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 "nfs4trace.h"
  58#include "internal.h"
  59#include "nfs4idmap.h"
  60#include "nfs4session.h"
  61#include "pnfs.h"
  62#include "netns.h"
  63
  64#define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66/* Mapping from NFS error code to "errno" error code. */
  67#define errno_NFSERR_IO         EIO
  68
  69struct compound_hdr;
  70static int nfs4_stat_to_errno(int);
  71static void encode_layoutget(struct xdr_stream *xdr,
  72                             const struct nfs4_layoutget_args *args,
  73                             struct compound_hdr *hdr);
  74static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  75                             struct nfs4_layoutget_res *res);
  76
  77/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  78#ifdef DEBUG
  79#define NFS4_MAXTAGLEN          20
  80#else
  81#define NFS4_MAXTAGLEN          0
  82#endif
  83
  84/* lock,open owner id:
  85 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  86 */
  87#define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  88#define lock_owner_id_maxsz     (1 + 1 + 4)
  89#define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  90#define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  91#define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92#define op_encode_hdr_maxsz     (1)
  93#define op_decode_hdr_maxsz     (2)
  94#define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  95#define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96#define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  97#define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98#define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  99                                (NFS4_FHSIZE >> 2))
 100#define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 101#define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 102#define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 103#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 104#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 105                                ((3+NFS4_FHSIZE) >> 2))
 106#define nfs4_fattr_bitmap_maxsz 4
 107#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 108#define nfstime4_maxsz          (3)
 109#define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 110#define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 111#define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 112#define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113#ifdef CONFIG_NFS_V4_SECURITY_LABEL
 114/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 115#define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 116#else
 117#define nfs4_label_maxsz        0
 118#endif
 119/* We support only one layout type per file system */
 120#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 121/* This is based on getfattr, which uses the most attributes: */
 122#define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 123                                3*nfstime4_maxsz + \
 124                                nfs4_owner_maxsz + \
 125                                nfs4_group_maxsz + nfs4_label_maxsz + \
 126                                 decode_mdsthreshold_maxsz))
 127#define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 128                                nfs4_fattr_value_maxsz)
 129#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 130#define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 131                                 1 + 2 + 1 + \
 132                                nfs4_owner_maxsz + \
 133                                nfs4_group_maxsz + \
 134                                nfs4_label_maxsz + \
 135                                1 + nfstime4_maxsz + \
 136                                1 + nfstime4_maxsz)
 137#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 138#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 139#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 140#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 141#define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 142/* The 5 accounts for the PNFS attributes, and assumes that at most three
 143 * layout types will be returned.
 144 */
 145#define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 146                                 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 147#define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 148#define decode_renew_maxsz      (op_decode_hdr_maxsz)
 149#define encode_setclientid_maxsz \
 150                                (op_encode_hdr_maxsz + \
 151                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                /* client name */ \
 153                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 154                                1 /* sc_prog */ + \
 155                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 157                                1) /* sc_cb_ident */
 158#define decode_setclientid_maxsz \
 159                                (op_decode_hdr_maxsz + \
 160                                2 /* clientid */ + \
 161                                XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 162                                1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 163                                1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 164#define encode_setclientid_confirm_maxsz \
 165                                (op_encode_hdr_maxsz + \
 166                                3 + (NFS4_VERIFIER_SIZE >> 2))
 167#define decode_setclientid_confirm_maxsz \
 168                                (op_decode_hdr_maxsz)
 169#define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 170#define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 171#define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 172#define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 173#define encode_share_access_maxsz \
 174                                (2)
 175#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 176#define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 177#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 178#define encode_open_maxsz       (op_encode_hdr_maxsz + \
 179                                2 + encode_share_access_maxsz + 2 + \
 180                                open_owner_id_maxsz + \
 181                                encode_opentype_maxsz + \
 182                                encode_claim_null_maxsz)
 183#define decode_space_limit_maxsz        (3)
 184#define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 185#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 186                                decode_space_limit_maxsz + \
 187                                decode_ace_maxsz)
 188#define decode_change_info_maxsz        (5)
 189#define decode_open_maxsz       (op_decode_hdr_maxsz + \
 190                                decode_stateid_maxsz + \
 191                                decode_change_info_maxsz + 1 + \
 192                                nfs4_fattr_bitmap_maxsz + \
 193                                decode_delegation_maxsz)
 194#define encode_open_confirm_maxsz \
 195                                (op_encode_hdr_maxsz + \
 196                                 encode_stateid_maxsz + 1)
 197#define decode_open_confirm_maxsz \
 198                                (op_decode_hdr_maxsz + \
 199                                 decode_stateid_maxsz)
 200#define encode_open_downgrade_maxsz \
 201                                (op_encode_hdr_maxsz + \
 202                                 encode_stateid_maxsz + 1 + \
 203                                 encode_share_access_maxsz)
 204#define decode_open_downgrade_maxsz \
 205                                (op_decode_hdr_maxsz + \
 206                                 decode_stateid_maxsz)
 207#define encode_close_maxsz      (op_encode_hdr_maxsz + \
 208                                 1 + encode_stateid_maxsz)
 209#define decode_close_maxsz      (op_decode_hdr_maxsz + \
 210                                 decode_stateid_maxsz)
 211#define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 212                                 encode_stateid_maxsz + \
 213                                 encode_attrs_maxsz)
 214#define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 215                                 nfs4_fattr_bitmap_maxsz)
 216#define encode_read_maxsz       (op_encode_hdr_maxsz + \
 217                                 encode_stateid_maxsz + 3)
 218#define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 219#define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 220                                 2 + encode_verifier_maxsz + 5 + \
 221                                nfs4_label_maxsz)
 222#define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 223                                 decode_verifier_maxsz + 1)
 224#define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225#define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + 1)
 226#define encode_write_maxsz      (op_encode_hdr_maxsz + \
 227                                 encode_stateid_maxsz + 4)
 228#define decode_write_maxsz      (op_decode_hdr_maxsz + \
 229                                 2 + decode_verifier_maxsz)
 230#define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 231#define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 232                                 decode_verifier_maxsz)
 233#define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 234                                nfs4_name_maxsz)
 235#define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 236                                 decode_change_info_maxsz)
 237#define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 238                                2 * nfs4_name_maxsz)
 239#define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 240                                 decode_change_info_maxsz + \
 241                                 decode_change_info_maxsz)
 242#define encode_link_maxsz       (op_encode_hdr_maxsz + \
 243                                nfs4_name_maxsz)
 244#define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 245#define encode_lockowner_maxsz  (7)
 246#define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 247                                 7 + \
 248                                 1 + encode_stateid_maxsz + 1 + \
 249                                 encode_lockowner_maxsz)
 250#define decode_lock_denied_maxsz \
 251                                (8 + decode_lockowner_maxsz)
 252#define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 253                                 decode_lock_denied_maxsz)
 254#define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 255                                encode_lockowner_maxsz)
 256#define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 257                                 decode_lock_denied_maxsz)
 258#define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 259                                 encode_stateid_maxsz + \
 260                                 4)
 261#define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 262                                 decode_stateid_maxsz)
 263#define encode_release_lockowner_maxsz \
 264                                (op_encode_hdr_maxsz + \
 265                                 encode_lockowner_maxsz)
 266#define decode_release_lockowner_maxsz \
 267                                (op_decode_hdr_maxsz)
 268#define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 269#define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 270#define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 271                                1 + nfs4_name_maxsz + \
 272                                1 + \
 273                                nfs4_fattr_maxsz)
 274#define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 275#define encode_create_maxsz     (op_encode_hdr_maxsz + \
 276                                1 + 2 + nfs4_name_maxsz + \
 277                                encode_attrs_maxsz)
 278#define decode_create_maxsz     (op_decode_hdr_maxsz + \
 279                                decode_change_info_maxsz + \
 280                                nfs4_fattr_bitmap_maxsz)
 281#define encode_statfs_maxsz     (encode_getattr_maxsz)
 282#define decode_statfs_maxsz     (decode_getattr_maxsz)
 283#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 284#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 285#define encode_getacl_maxsz     (encode_getattr_maxsz)
 286#define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 287                                 nfs4_fattr_bitmap_maxsz + 1 + 1)
 288#define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 289                                 encode_stateid_maxsz + 3)
 290#define decode_setacl_maxsz     (decode_setattr_maxsz)
 291#define encode_fs_locations_maxsz \
 292                                (encode_getattr_maxsz)
 293#define decode_fs_locations_maxsz \
 294                                (1)
 295#define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 296#define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 297
 298#if defined(CONFIG_NFS_V4_1)
 299#define NFS4_MAX_MACHINE_NAME_LEN (64)
 300#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 301                         sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 302
 303#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 304                                encode_verifier_maxsz + \
 305                                1 /* co_ownerid.len */ + \
 306                                /* eia_clientowner */ \
 307                                1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 308                                1 /* flags */ + \
 309                                1 /* spa_how */ + \
 310                                /* max is SP4_MACH_CRED (for now) */ + \
 311                                1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                1 /* implementation id array of size 1 */ + \
 314                                1 /* nii_domain */ + \
 315                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 316                                1 /* nii_name */ + \
 317                                XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 318                                3 /* nii_date */)
 319#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 320                                2 /* eir_clientid */ + \
 321                                1 /* eir_sequenceid */ + \
 322                                1 /* eir_flags */ + \
 323                                1 /* spr_how */ + \
 324                                  /* max is SP4_MACH_CRED (for now) */ + \
 325                                1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                1 + NFS4_OP_MAP_NUM_WORDS + \
 327                                2 /* eir_server_owner.so_minor_id */ + \
 328                                /* eir_server_owner.so_major_id<> */ \
 329                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 330                                /* eir_server_scope<> */ \
 331                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 332                                1 /* eir_server_impl_id array length */ + \
 333                                1 /* nii_domain */ + \
 334                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 335                                1 /* nii_name */ + \
 336                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 337                                3 /* nii_date */)
 338#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 339#define decode_channel_attrs_maxsz  (6 + \
 340                                     1 /* ca_rdma_ird.len */ + \
 341                                     1 /* ca_rdma_ird */)
 342#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 343                                     2 /* csa_clientid */ + \
 344                                     1 /* csa_sequence */ + \
 345                                     1 /* csa_flags */ + \
 346                                     encode_channel_attrs_maxsz + \
 347                                     encode_channel_attrs_maxsz + \
 348                                     1 /* csa_cb_program */ + \
 349                                     1 /* csa_sec_parms.len (1) */ + \
 350                                     1 /* cb_secflavor (AUTH_SYS) */ + \
 351                                     1 /* stamp */ + \
 352                                     1 /* machinename.len */ + \
 353                                     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 354                                     1 /* uid */ + \
 355                                     1 /* gid */ + \
 356                                     1 /* gids.len (0) */)
 357#define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 358                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                     1 /* csr_sequence */ + \
 360                                     1 /* csr_flags */ + \
 361                                     decode_channel_attrs_maxsz + \
 362                                     decode_channel_attrs_maxsz)
 363#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 364                                     /* bctsa_sessid */ \
 365                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 366                                     1 /* bctsa_dir */ + \
 367                                     1 /* bctsa_use_conn_in_rdma_mode */)
 368#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 369                                     /* bctsr_sessid */ \
 370                                     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 371                                     1 /* bctsr_dir */ + \
 372                                     1 /* bctsr_use_conn_in_rdma_mode */)
 373#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 374#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 375#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 376#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 377#define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 378                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 379#define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 380                                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 381#define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 382#define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 383#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 384                                XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 385                                1 /* layout type */ + \
 386                                1 /* maxcount */ + \
 387                                1 /* bitmap size */ + \
 388                                1 /* notification bitmap length */ + \
 389                                1 /* notification bitmap, word 0 */)
 390#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 391                                1 /* layout type */ + \
 392                                1 /* opaque devaddr4 length */ + \
 393                                  /* devaddr4 payload is read into page */ \
 394                                1 /* notification bitmap length */ + \
 395                                1 /* notification bitmap, word 0 */ + \
 396                                1 /* possible XDR padding */)
 397#define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 398                                encode_stateid_maxsz)
 399#define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 400                                decode_stateid_maxsz + \
 401                                XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
 402#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 403                                2 /* offset */ + \
 404                                2 /* length */ + \
 405                                1 /* reclaim */ + \
 406                                encode_stateid_maxsz + \
 407                                1 /* new offset (true) */ + \
 408                                2 /* last byte written */ + \
 409                                1 /* nt_timechanged (false) */ + \
 410                                1 /* layoutupdate4 layout type */ + \
 411                                1 /* layoutupdate4 opaqueue len */)
 412                                  /* the actual content of layoutupdate4 should
 413                                     be allocated by drivers and spliced in
 414                                     using xdr_write_pages */
 415#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 416#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 417                                encode_stateid_maxsz + \
 418                                1 + \
 419                                XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 420#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 421                                1 + decode_stateid_maxsz)
 422#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 423#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 424#define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 425                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 426#define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 427#define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 428                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
 429#define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 430#else /* CONFIG_NFS_V4_1 */
 431#define encode_sequence_maxsz   0
 432#define decode_sequence_maxsz   0
 433#define encode_layoutreturn_maxsz 0
 434#define decode_layoutreturn_maxsz 0
 435#define encode_layoutget_maxsz  0
 436#define decode_layoutget_maxsz  0
 437#endif /* CONFIG_NFS_V4_1 */
 438
 439#define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 440#define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 441#define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 442                                encode_sequence_maxsz + \
 443                                encode_putfh_maxsz + \
 444                                encode_read_maxsz)
 445#define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 446                                decode_sequence_maxsz + \
 447                                decode_putfh_maxsz + \
 448                                decode_read_maxsz)
 449#define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 450                                encode_sequence_maxsz + \
 451                                encode_putfh_maxsz + \
 452                                encode_readlink_maxsz)
 453#define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 454                                decode_sequence_maxsz + \
 455                                decode_putfh_maxsz + \
 456                                decode_readlink_maxsz)
 457#define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 458                                encode_sequence_maxsz + \
 459                                encode_putfh_maxsz + \
 460                                encode_readdir_maxsz)
 461#define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 462                                decode_sequence_maxsz + \
 463                                decode_putfh_maxsz + \
 464                                decode_readdir_maxsz)
 465#define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 466                                encode_sequence_maxsz + \
 467                                encode_putfh_maxsz + \
 468                                encode_write_maxsz + \
 469                                encode_getattr_maxsz)
 470#define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 471                                decode_sequence_maxsz + \
 472                                decode_putfh_maxsz + \
 473                                decode_write_maxsz + \
 474                                decode_getattr_maxsz)
 475#define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 476                                encode_sequence_maxsz + \
 477                                encode_putfh_maxsz + \
 478                                encode_commit_maxsz)
 479#define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 480                                decode_sequence_maxsz + \
 481                                decode_putfh_maxsz + \
 482                                decode_commit_maxsz)
 483#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 484                                encode_sequence_maxsz + \
 485                                encode_putfh_maxsz + \
 486                                encode_open_maxsz + \
 487                                encode_access_maxsz + \
 488                                encode_getfh_maxsz + \
 489                                encode_getattr_maxsz + \
 490                                encode_layoutget_maxsz)
 491#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 492                                decode_sequence_maxsz + \
 493                                decode_putfh_maxsz + \
 494                                decode_open_maxsz + \
 495                                decode_access_maxsz + \
 496                                decode_getfh_maxsz + \
 497                                decode_getattr_maxsz + \
 498                                decode_layoutget_maxsz)
 499#define NFS4_enc_open_confirm_sz \
 500                                (compound_encode_hdr_maxsz + \
 501                                 encode_putfh_maxsz + \
 502                                 encode_open_confirm_maxsz)
 503#define NFS4_dec_open_confirm_sz \
 504                                (compound_decode_hdr_maxsz + \
 505                                 decode_putfh_maxsz + \
 506                                 decode_open_confirm_maxsz)
 507#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 508                                        encode_sequence_maxsz + \
 509                                        encode_putfh_maxsz + \
 510                                        encode_open_maxsz + \
 511                                        encode_access_maxsz + \
 512                                        encode_getattr_maxsz + \
 513                                        encode_layoutget_maxsz)
 514#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 515                                        decode_sequence_maxsz + \
 516                                        decode_putfh_maxsz + \
 517                                        decode_open_maxsz + \
 518                                        decode_access_maxsz + \
 519                                        decode_getattr_maxsz + \
 520                                        decode_layoutget_maxsz)
 521#define NFS4_enc_open_downgrade_sz \
 522                                (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_layoutreturn_maxsz + \
 526                                 encode_open_downgrade_maxsz)
 527#define NFS4_dec_open_downgrade_sz \
 528                                (compound_decode_hdr_maxsz + \
 529                                 decode_sequence_maxsz + \
 530                                 decode_putfh_maxsz + \
 531                                 decode_layoutreturn_maxsz + \
 532                                 decode_open_downgrade_maxsz)
 533#define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 534                                 encode_sequence_maxsz + \
 535                                 encode_putfh_maxsz + \
 536                                 encode_layoutreturn_maxsz + \
 537                                 encode_close_maxsz + \
 538                                 encode_getattr_maxsz)
 539#define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 540                                 decode_sequence_maxsz + \
 541                                 decode_putfh_maxsz + \
 542                                 decode_layoutreturn_maxsz + \
 543                                 decode_close_maxsz + \
 544                                 decode_getattr_maxsz)
 545#define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 546                                 encode_sequence_maxsz + \
 547                                 encode_putfh_maxsz + \
 548                                 encode_setattr_maxsz + \
 549                                 encode_getattr_maxsz)
 550#define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 551                                 decode_sequence_maxsz + \
 552                                 decode_putfh_maxsz + \
 553                                 decode_setattr_maxsz + \
 554                                 decode_getattr_maxsz)
 555#define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 556                                encode_sequence_maxsz + \
 557                                encode_putfh_maxsz + \
 558                                encode_fsinfo_maxsz)
 559#define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 560                                decode_sequence_maxsz + \
 561                                decode_putfh_maxsz + \
 562                                decode_fsinfo_maxsz)
 563#define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 564                                encode_renew_maxsz)
 565#define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 566                                decode_renew_maxsz)
 567#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 568                                encode_setclientid_maxsz)
 569#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 570                                decode_setclientid_maxsz)
 571#define NFS4_enc_setclientid_confirm_sz \
 572                                (compound_encode_hdr_maxsz + \
 573                                encode_setclientid_confirm_maxsz)
 574#define NFS4_dec_setclientid_confirm_sz \
 575                                (compound_decode_hdr_maxsz + \
 576                                decode_setclientid_confirm_maxsz)
 577#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 578                                encode_sequence_maxsz + \
 579                                encode_putfh_maxsz + \
 580                                encode_lock_maxsz)
 581#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 582                                decode_sequence_maxsz + \
 583                                decode_putfh_maxsz + \
 584                                decode_lock_maxsz)
 585#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 586                                encode_sequence_maxsz + \
 587                                encode_putfh_maxsz + \
 588                                encode_lockt_maxsz)
 589#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 590                                 decode_sequence_maxsz + \
 591                                 decode_putfh_maxsz + \
 592                                 decode_lockt_maxsz)
 593#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 594                                encode_sequence_maxsz + \
 595                                encode_putfh_maxsz + \
 596                                encode_locku_maxsz)
 597#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 598                                decode_sequence_maxsz + \
 599                                decode_putfh_maxsz + \
 600                                decode_locku_maxsz)
 601#define NFS4_enc_release_lockowner_sz \
 602                                (compound_encode_hdr_maxsz + \
 603                                 encode_lockowner_maxsz)
 604#define NFS4_dec_release_lockowner_sz \
 605                                (compound_decode_hdr_maxsz + \
 606                                 decode_lockowner_maxsz)
 607#define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 608                                encode_sequence_maxsz + \
 609                                encode_putfh_maxsz + \
 610                                encode_access_maxsz + \
 611                                encode_getattr_maxsz)
 612#define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 613                                decode_sequence_maxsz + \
 614                                decode_putfh_maxsz + \
 615                                decode_access_maxsz + \
 616                                decode_getattr_maxsz)
 617#define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 618                                encode_sequence_maxsz + \
 619                                encode_putfh_maxsz + \
 620                                encode_getattr_maxsz + \
 621                                encode_renew_maxsz)
 622#define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 623                                decode_sequence_maxsz + \
 624                                decode_putfh_maxsz + \
 625                                decode_getattr_maxsz + \
 626                                decode_renew_maxsz)
 627#define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 628                                encode_sequence_maxsz + \
 629                                encode_putfh_maxsz + \
 630                                encode_lookup_maxsz + \
 631                                encode_getattr_maxsz + \
 632                                encode_getfh_maxsz)
 633#define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 634                                decode_sequence_maxsz + \
 635                                decode_putfh_maxsz + \
 636                                decode_lookup_maxsz + \
 637                                decode_getattr_maxsz + \
 638                                decode_getfh_maxsz)
 639#define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 640                                encode_sequence_maxsz + \
 641                                encode_putfh_maxsz + \
 642                                encode_lookupp_maxsz + \
 643                                encode_getattr_maxsz + \
 644                                encode_getfh_maxsz)
 645#define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 646                                decode_sequence_maxsz + \
 647                                decode_putfh_maxsz + \
 648                                decode_lookupp_maxsz + \
 649                                decode_getattr_maxsz + \
 650                                decode_getfh_maxsz)
 651#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 652                                encode_sequence_maxsz + \
 653                                encode_putrootfh_maxsz + \
 654                                encode_getattr_maxsz + \
 655                                encode_getfh_maxsz)
 656#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 657                                decode_sequence_maxsz + \
 658                                decode_putrootfh_maxsz + \
 659                                decode_getattr_maxsz + \
 660                                decode_getfh_maxsz)
 661#define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 662                                encode_sequence_maxsz + \
 663                                encode_putfh_maxsz + \
 664                                encode_remove_maxsz)
 665#define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 666                                decode_sequence_maxsz + \
 667                                decode_putfh_maxsz + \
 668                                decode_remove_maxsz)
 669#define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 670                                encode_sequence_maxsz + \
 671                                encode_putfh_maxsz + \
 672                                encode_savefh_maxsz + \
 673                                encode_putfh_maxsz + \
 674                                encode_rename_maxsz)
 675#define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 676                                decode_sequence_maxsz + \
 677                                decode_putfh_maxsz + \
 678                                decode_savefh_maxsz + \
 679                                decode_putfh_maxsz + \
 680                                decode_rename_maxsz)
 681#define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 682                                encode_sequence_maxsz + \
 683                                encode_putfh_maxsz + \
 684                                encode_savefh_maxsz + \
 685                                encode_putfh_maxsz + \
 686                                encode_link_maxsz + \
 687                                encode_restorefh_maxsz + \
 688                                encode_getattr_maxsz)
 689#define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 690                                decode_sequence_maxsz + \
 691                                decode_putfh_maxsz + \
 692                                decode_savefh_maxsz + \
 693                                decode_putfh_maxsz + \
 694                                decode_link_maxsz + \
 695                                decode_restorefh_maxsz + \
 696                                decode_getattr_maxsz)
 697#define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 698                                encode_sequence_maxsz + \
 699                                encode_putfh_maxsz + \
 700                                encode_symlink_maxsz + \
 701                                encode_getattr_maxsz + \
 702                                encode_getfh_maxsz)
 703#define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 704                                decode_sequence_maxsz + \
 705                                decode_putfh_maxsz + \
 706                                decode_symlink_maxsz + \
 707                                decode_getattr_maxsz + \
 708                                decode_getfh_maxsz)
 709#define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 710                                encode_sequence_maxsz + \
 711                                encode_putfh_maxsz + \
 712                                encode_create_maxsz + \
 713                                encode_getfh_maxsz + \
 714                                encode_getattr_maxsz)
 715#define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 716                                decode_sequence_maxsz + \
 717                                decode_putfh_maxsz + \
 718                                decode_create_maxsz + \
 719                                decode_getfh_maxsz + \
 720                                decode_getattr_maxsz)
 721#define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 722                                encode_sequence_maxsz + \
 723                                encode_putfh_maxsz + \
 724                                encode_getattr_maxsz)
 725#define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 726                                decode_sequence_maxsz + \
 727                                decode_putfh_maxsz + \
 728                                decode_getattr_maxsz)
 729#define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 730                                encode_sequence_maxsz + \
 731                                encode_putfh_maxsz + \
 732                                encode_statfs_maxsz)
 733#define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 734                                decode_sequence_maxsz + \
 735                                decode_putfh_maxsz + \
 736                                decode_statfs_maxsz)
 737#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 738                                encode_sequence_maxsz + \
 739                                encode_putfh_maxsz + \
 740                                encode_getattr_maxsz)
 741#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 742                                decode_sequence_maxsz + \
 743                                decode_putfh_maxsz + \
 744                                decode_getattr_maxsz)
 745#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 746                                encode_sequence_maxsz + \
 747                                encode_putfh_maxsz + \
 748                                encode_layoutreturn_maxsz + \
 749                                encode_delegreturn_maxsz + \
 750                                encode_getattr_maxsz)
 751#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 752                                decode_sequence_maxsz + \
 753                                decode_putfh_maxsz + \
 754                                decode_layoutreturn_maxsz + \
 755                                decode_delegreturn_maxsz + \
 756                                decode_getattr_maxsz)
 757#define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 758                                encode_sequence_maxsz + \
 759                                encode_putfh_maxsz + \
 760                                encode_getacl_maxsz)
 761#define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 762                                decode_sequence_maxsz + \
 763                                decode_putfh_maxsz + \
 764                                decode_getacl_maxsz)
 765#define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 766                                encode_sequence_maxsz + \
 767                                encode_putfh_maxsz + \
 768                                encode_setacl_maxsz)
 769#define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 770                                decode_sequence_maxsz + \
 771                                decode_putfh_maxsz + \
 772                                decode_setacl_maxsz)
 773#define NFS4_enc_fs_locations_sz \
 774                                (compound_encode_hdr_maxsz + \
 775                                 encode_sequence_maxsz + \
 776                                 encode_putfh_maxsz + \
 777                                 encode_lookup_maxsz + \
 778                                 encode_fs_locations_maxsz + \
 779                                 encode_renew_maxsz)
 780#define NFS4_dec_fs_locations_sz \
 781                                (compound_decode_hdr_maxsz + \
 782                                 decode_sequence_maxsz + \
 783                                 decode_putfh_maxsz + \
 784                                 decode_lookup_maxsz + \
 785                                 decode_fs_locations_maxsz + \
 786                                 decode_renew_maxsz)
 787#define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 788                                encode_sequence_maxsz + \
 789                                encode_putfh_maxsz + \
 790                                encode_secinfo_maxsz)
 791#define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 792                                decode_sequence_maxsz + \
 793                                decode_putfh_maxsz + \
 794                                decode_secinfo_maxsz)
 795#define NFS4_enc_fsid_present_sz \
 796                                (compound_encode_hdr_maxsz + \
 797                                 encode_sequence_maxsz + \
 798                                 encode_putfh_maxsz + \
 799                                 encode_getfh_maxsz + \
 800                                 encode_renew_maxsz)
 801#define NFS4_dec_fsid_present_sz \
 802                                (compound_decode_hdr_maxsz + \
 803                                 decode_sequence_maxsz + \
 804                                 decode_putfh_maxsz + \
 805                                 decode_getfh_maxsz + \
 806                                 decode_renew_maxsz)
 807#if defined(CONFIG_NFS_V4_1)
 808#define NFS4_enc_bind_conn_to_session_sz \
 809                                (compound_encode_hdr_maxsz + \
 810                                 encode_bind_conn_to_session_maxsz)
 811#define NFS4_dec_bind_conn_to_session_sz \
 812                                (compound_decode_hdr_maxsz + \
 813                                 decode_bind_conn_to_session_maxsz)
 814#define NFS4_enc_exchange_id_sz \
 815                                (compound_encode_hdr_maxsz + \
 816                                 encode_exchange_id_maxsz)
 817#define NFS4_dec_exchange_id_sz \
 818                                (compound_decode_hdr_maxsz + \
 819                                 decode_exchange_id_maxsz)
 820#define NFS4_enc_create_session_sz \
 821                                (compound_encode_hdr_maxsz + \
 822                                 encode_create_session_maxsz)
 823#define NFS4_dec_create_session_sz \
 824                                (compound_decode_hdr_maxsz + \
 825                                 decode_create_session_maxsz)
 826#define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 827                                         encode_destroy_session_maxsz)
 828#define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 829                                         decode_destroy_session_maxsz)
 830#define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 831                                         encode_destroy_clientid_maxsz)
 832#define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 833                                         decode_destroy_clientid_maxsz)
 834#define NFS4_enc_sequence_sz \
 835                                (compound_decode_hdr_maxsz + \
 836                                 encode_sequence_maxsz)
 837#define NFS4_dec_sequence_sz \
 838                                (compound_decode_hdr_maxsz + \
 839                                 decode_sequence_maxsz)
 840#endif
 841#define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 842                                         encode_sequence_maxsz + \
 843                                         encode_putrootfh_maxsz + \
 844                                         encode_fsinfo_maxsz)
 845#define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 846                                         decode_sequence_maxsz + \
 847                                         decode_putrootfh_maxsz + \
 848                                         decode_fsinfo_maxsz)
 849#if defined(CONFIG_NFS_V4_1)
 850#define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 851                                         encode_sequence_maxsz + \
 852                                         encode_reclaim_complete_maxsz)
 853#define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 854                                         decode_sequence_maxsz + \
 855                                         decode_reclaim_complete_maxsz)
 856#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 857                                encode_sequence_maxsz +\
 858                                encode_getdeviceinfo_maxsz)
 859#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 860                                decode_sequence_maxsz + \
 861                                decode_getdeviceinfo_maxsz)
 862#define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 863                                encode_sequence_maxsz + \
 864                                encode_putfh_maxsz +        \
 865                                encode_layoutget_maxsz)
 866#define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 867                                decode_sequence_maxsz + \
 868                                decode_putfh_maxsz +        \
 869                                decode_layoutget_maxsz)
 870#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 871                                encode_sequence_maxsz +\
 872                                encode_putfh_maxsz + \
 873                                encode_layoutcommit_maxsz + \
 874                                encode_getattr_maxsz)
 875#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 876                                decode_sequence_maxsz + \
 877                                decode_putfh_maxsz + \
 878                                decode_layoutcommit_maxsz + \
 879                                decode_getattr_maxsz)
 880#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 881                                encode_sequence_maxsz + \
 882                                encode_putfh_maxsz + \
 883                                encode_layoutreturn_maxsz)
 884#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 885                                decode_sequence_maxsz + \
 886                                decode_putfh_maxsz + \
 887                                decode_layoutreturn_maxsz)
 888#define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 889                                        encode_sequence_maxsz + \
 890                                        encode_putrootfh_maxsz +\
 891                                        encode_secinfo_no_name_maxsz)
 892#define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 893                                        decode_sequence_maxsz + \
 894                                        decode_putrootfh_maxsz + \
 895                                        decode_secinfo_no_name_maxsz)
 896#define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 897                                         encode_sequence_maxsz + \
 898                                         encode_test_stateid_maxsz)
 899#define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 900                                         decode_sequence_maxsz + \
 901                                         decode_test_stateid_maxsz)
 902#define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 903                                         encode_sequence_maxsz + \
 904                                         encode_free_stateid_maxsz)
 905#define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 906                                         decode_sequence_maxsz + \
 907                                         decode_free_stateid_maxsz)
 908
 909const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 910                                      compound_encode_hdr_maxsz +
 911                                      encode_sequence_maxsz +
 912                                      encode_putfh_maxsz +
 913                                      encode_getattr_maxsz) *
 914                                     XDR_UNIT);
 915
 916const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 917                                     compound_decode_hdr_maxsz +
 918                                     decode_sequence_maxsz +
 919                                     decode_putfh_maxsz) *
 920                                    XDR_UNIT);
 921
 922const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 923                                           compound_decode_hdr_maxsz +
 924                                           decode_sequence_maxsz) *
 925                                          XDR_UNIT);
 926EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 927#endif /* CONFIG_NFS_V4_1 */
 928
 929static const umode_t nfs_type2fmt[] = {
 930        [NF4BAD] = 0,
 931        [NF4REG] = S_IFREG,
 932        [NF4DIR] = S_IFDIR,
 933        [NF4BLK] = S_IFBLK,
 934        [NF4CHR] = S_IFCHR,
 935        [NF4LNK] = S_IFLNK,
 936        [NF4SOCK] = S_IFSOCK,
 937        [NF4FIFO] = S_IFIFO,
 938        [NF4ATTRDIR] = 0,
 939        [NF4NAMEDATTR] = 0,
 940};
 941
 942struct compound_hdr {
 943        int32_t         status;
 944        uint32_t        nops;
 945        __be32 *        nops_p;
 946        uint32_t        taglen;
 947        char *          tag;
 948        uint32_t        replen;         /* expected reply words */
 949        u32             minorversion;
 950};
 951
 952static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 953{
 954        __be32 *p = xdr_reserve_space(xdr, nbytes);
 955        BUG_ON(!p);
 956        return p;
 957}
 958
 959static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 960{
 961        WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 962}
 963
 964static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 965{
 966        WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 967}
 968
 969static void encode_uint32(struct xdr_stream *xdr, u32 n)
 970{
 971        WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 972}
 973
 974static void encode_uint64(struct xdr_stream *xdr, u64 n)
 975{
 976        WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 977}
 978
 979static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 980                const __u32 *bitmap, size_t len)
 981{
 982        ssize_t ret;
 983
 984        /* Trim empty words */
 985        while (len > 0 && bitmap[len-1] == 0)
 986                len--;
 987        ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 988        if (WARN_ON_ONCE(ret < 0))
 989                return ret;
 990        return len;
 991}
 992
 993static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 994                __u32 *res, size_t len)
 995{
 996        size_t i;
 997        __u32 tmp;
 998
 999        while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000                len--;

1001        for (i = len; i-- > 0;) {
1002                tmp = bitmap[i] & mask[i];
1003                res[i] = tmp;
1004        }
1005        return len;
1006}
1007
1008static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009                const struct nfs_seqid *seqid)
1010{
1011        if (seqid != NULL)
1012                encode_uint32(xdr, seqid->sequence->counter);
1013        else
1014                encode_uint32(xdr, 0);
1015}
1016
1017static void encode_compound_hdr(struct xdr_stream *xdr,
1018                                struct rpc_rqst *req,
1019                                struct compound_hdr *hdr)
1020{
1021        __be32 *p;
1022
1023        /* initialize running count of expected bytes in reply.
1024         * NOTE: the replied tag SHOULD be the same is the one sent,
1025         * but this is not required as a MUST for the server to do so. */
1026        hdr->replen = 3 + hdr->taglen;
1027
1028        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029        encode_string(xdr, hdr->taglen, hdr->tag);
1030        p = reserve_space(xdr, 8);
1031        *p++ = cpu_to_be32(hdr->minorversion);
1032        hdr->nops_p = p;
1033        *p = cpu_to_be32(hdr->nops);
1034}
1035
1036static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037                uint32_t replen,
1038                struct compound_hdr *hdr)
1039{
1040        encode_uint32(xdr, op);
1041        hdr->nops++;
1042        hdr->replen += replen;
1043}
1044
1045static void encode_nops(struct compound_hdr *hdr)
1046{
1047        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048        *hdr->nops_p = htonl(hdr->nops);
1049}
1050
1051static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052{
1053        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054}
1055
1056static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057{
1058        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059}
1060
1061static __be32 *
1062xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1063{
1064        p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1065        *p++ = cpu_to_be32(t->tv_nsec);
1066        return p;
1067}
1068
1069static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070                                const struct nfs4_label *label,
1071                                const umode_t *umask,
1072                                const struct nfs_server *server,
1073                                const uint32_t attrmask[])
1074{
1075        struct timespec ts;
1076        char owner_name[IDMAP_NAMESZ];
1077        char owner_group[IDMAP_NAMESZ];
1078        int owner_namelen = 0;
1079        int owner_grouplen = 0;
1080        __be32 *p;
1081        uint32_t len = 0;
1082        uint32_t bmval[3] = { 0 };
1083
1084        /*
1085         * We reserve enough space to write the entire attribute buffer at once.
1086         */
1087        if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1088                bmval[0] |= FATTR4_WORD0_SIZE;
1089                len += 8;
1090        }
1091        if (iap->ia_valid & ATTR_MODE) {
1092                if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1093                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1094                        len += 8;
1095                } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1096                        bmval[1] |= FATTR4_WORD1_MODE;
1097                        len += 4;
1098                }
1099        }
1100        if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1101                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1102                if (owner_namelen < 0) {
1103                        dprintk("nfs: couldn't resolve uid %d to string\n",
1104                                        from_kuid(&init_user_ns, iap->ia_uid));
1105                        /* XXX */
1106                        strcpy(owner_name, "nobody");
1107                        owner_namelen = sizeof("nobody") - 1;
1108                        /* goto out; */
1109                }
1110                bmval[1] |= FATTR4_WORD1_OWNER;
1111                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1112        }
1113        if ((iap->ia_valid & ATTR_GID) &&
1114           (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1115                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1116                if (owner_grouplen < 0) {
1117                        dprintk("nfs: couldn't resolve gid %d to string\n",
1118                                        from_kgid(&init_user_ns, iap->ia_gid));
1119                        strcpy(owner_group, "nobody");
1120                        owner_grouplen = sizeof("nobody") - 1;
1121                        /* goto out; */
1122                }
1123                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1124                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1125        }
1126        if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1127                if (iap->ia_valid & ATTR_ATIME_SET) {
1128                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129                        len += 4 + (nfstime4_maxsz << 2);
1130                } else if (iap->ia_valid & ATTR_ATIME) {
1131                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1132                        len += 4;
1133                }
1134        }
1135        if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1136                if (iap->ia_valid & ATTR_MTIME_SET) {
1137                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138                        len += 4 + (nfstime4_maxsz << 2);
1139                } else if (iap->ia_valid & ATTR_MTIME) {
1140                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1141                        len += 4;
1142                }
1143        }
1144
1145        if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1146                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1147                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1148        }
1149
1150        xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1151        xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1152
1153        if (bmval[0] & FATTR4_WORD0_SIZE)
1154                p = xdr_encode_hyper(p, iap->ia_size);
1155        if (bmval[1] & FATTR4_WORD1_MODE)
1156                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1157        if (bmval[1] & FATTR4_WORD1_OWNER)
1158                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1159        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1160                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1161        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1162                if (iap->ia_valid & ATTR_ATIME_SET) {
1163                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1164                        ts = timespec64_to_timespec(iap->ia_atime);
1165                        p = xdr_encode_nfstime4(p, &ts);
1166                } else
1167                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168        }
1169        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170                if (iap->ia_valid & ATTR_MTIME_SET) {
1171                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172                        ts = timespec64_to_timespec(iap->ia_mtime);
1173                        p = xdr_encode_nfstime4(p, &ts);
1174                } else
1175                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1176        }
1177        if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1178                *p++ = cpu_to_be32(label->lfs);
1179                *p++ = cpu_to_be32(label->pi);
1180                *p++ = cpu_to_be32(label->len);
1181                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1182        }
1183        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1184                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1185                *p++ = cpu_to_be32(*umask);
1186        }
1187
1188/* out: */
1189}
1190
1191static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1192{
1193        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1194        encode_uint32(xdr, access);
1195}
1196
1197static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1198{
1199        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1200        encode_nfs4_seqid(xdr, arg->seqid);
1201        encode_nfs4_stateid(xdr, &arg->stateid);
1202}
1203
1204static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1205{
1206        __be32 *p;
1207
1208        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1209        p = reserve_space(xdr, 12);
1210        p = xdr_encode_hyper(p, args->offset);
1211        *p = cpu_to_be32(args->count);
1212}
1213
1214static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1215{
1216        __be32 *p;
1217
1218        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1219        encode_uint32(xdr, create->ftype);
1220
1221        switch (create->ftype) {
1222        case NF4LNK:
1223                p = reserve_space(xdr, 4);
1224                *p = cpu_to_be32(create->u.symlink.len);
1225                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1226                                create->u.symlink.len);
1227                xdr->buf->flags |= XDRBUF_WRITE;
1228                break;
1229
1230        case NF4BLK: case NF4CHR:
1231                p = reserve_space(xdr, 8);
1232                *p++ = cpu_to_be32(create->u.device.specdata1);
1233                *p = cpu_to_be32(create->u.device.specdata2);
1234                break;
1235
1236        default:
1237                break;
1238        }
1239
1240        encode_string(xdr, create->name->len, create->name->name);
1241        encode_attrs(xdr, create->attrs, create->label, &create->umask,
1242                        create->server, create->server->attr_bitmask);
1243}
1244
1245static void encode_getattr(struct xdr_stream *xdr,
1246                const __u32 *bitmap, const __u32 *mask, size_t len,
1247                struct compound_hdr *hdr)
1248{
1249        __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1250
1251        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1252        if (mask) {
1253                if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1254                        len = ARRAY_SIZE(masked_bitmap);
1255                len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1256                bitmap = masked_bitmap;
1257        }
1258        xdr_encode_bitmap4(xdr, bitmap, len);
1259}
1260
1261static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1262{
1263        encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1264                        ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1265}
1266
1267static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1268                                 const u32 *open_bitmap,
1269                                 struct compound_hdr *hdr)
1270{
1271        encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1272}
1273
1274static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1275{
1276        encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1277                        ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1278}
1279
1280static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281{
1282        encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1283                        ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1284}
1285
1286static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287{
1288        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289}
1290
1291static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292{
1293        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294        encode_string(xdr, name->len, name->name);
1295}
1296
1297static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298{
1299        if (fl->fl_type == F_RDLCK)
1300                return block ? NFS4_READW_LT : NFS4_READ_LT;
1301        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302}
1303
1304static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305{
1306        if (fl->fl_end == OFFSET_MAX)
1307                return ~(uint64_t)0;
1308        return fl->fl_end - fl->fl_start + 1;
1309}
1310
1311static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312{
1313        __be32 *p;
1314
1315        p = reserve_space(xdr, 32);
1316        p = xdr_encode_hyper(p, lowner->clientid);
1317        *p++ = cpu_to_be32(20);
1318        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319        *p++ = cpu_to_be32(lowner->s_dev);
1320        xdr_encode_hyper(p, lowner->id);
1321}
1322
1323/*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328{
1329        __be32 *p;
1330
1331        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332        p = reserve_space(xdr, 28);
1333        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334        *p++ = cpu_to_be32(args->reclaim);
1335        p = xdr_encode_hyper(p, args->fl->fl_start);
1336        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337        *p = cpu_to_be32(args->new_lock_owner);
1338        if (args->new_lock_owner){
1339                encode_nfs4_seqid(xdr, args->open_seqid);
1340                encode_nfs4_stateid(xdr, &args->open_stateid);
1341                encode_nfs4_seqid(xdr, args->lock_seqid);
1342                encode_lockowner(xdr, &args->lock_owner);
1343        }
1344        else {
1345                encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                encode_nfs4_seqid(xdr, args->lock_seqid);
1347        }
1348}
1349
1350static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351{
1352        __be32 *p;
1353
1354        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355        p = reserve_space(xdr, 20);
1356        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357        p = xdr_encode_hyper(p, args->fl->fl_start);
1358        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359        encode_lockowner(xdr, &args->lock_owner);
1360}
1361
1362static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363{
1364        __be32 *p;
1365
1366        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368        encode_nfs4_seqid(xdr, args->seqid);
1369        encode_nfs4_stateid(xdr, &args->stateid);
1370        p = reserve_space(xdr, 16);
1371        p = xdr_encode_hyper(p, args->fl->fl_start);
1372        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373}
1374
1375static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376{
1377        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378        encode_lockowner(xdr, lowner);
1379}
1380
1381static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382{
1383        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384        encode_string(xdr, name->len, name->name);
1385}
1386
1387static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1388{
1389        encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1390}
1391
1392static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1393{
1394        __be32 *p;
1395
1396        p = reserve_space(xdr, 8);
1397        *p++ = cpu_to_be32(share_access);
1398        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1399}
1400
1401static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402{
1403        __be32 *p;
1404 /*
1405 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1406 * owner 4 = 32
1407 */
1408        encode_nfs4_seqid(xdr, arg->seqid);
1409        encode_share_access(xdr, arg->share_access);
1410        p = reserve_space(xdr, 36);
1411        p = xdr_encode_hyper(p, arg->clientid);
1412        *p++ = cpu_to_be32(24);
1413        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1414        *p++ = cpu_to_be32(arg->server->s_dev);
1415        *p++ = cpu_to_be32(arg->id.uniquifier);
1416        xdr_encode_hyper(p, arg->id.create_time);
1417}
1418
1419static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1420{
1421        __be32 *p;
1422
1423        p = reserve_space(xdr, 4);
1424        switch(arg->createmode) {
1425        case NFS4_CREATE_UNCHECKED:
1426                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1427                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1428                                arg->server, arg->server->attr_bitmask);
1429                break;
1430        case NFS4_CREATE_GUARDED:
1431                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1432                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1433                                arg->server, arg->server->attr_bitmask);
1434                break;
1435        case NFS4_CREATE_EXCLUSIVE:
1436                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1437                encode_nfs4_verifier(xdr, &arg->u.verifier);
1438                break;
1439        case NFS4_CREATE_EXCLUSIVE4_1:
1440                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1441                encode_nfs4_verifier(xdr, &arg->u.verifier);
1442                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1443                                arg->server, arg->server->exclcreat_bitmask);
1444        }
1445}
1446
1447static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1448{
1449        __be32 *p;
1450
1451        p = reserve_space(xdr, 4);
1452        switch (arg->open_flags & O_CREAT) {
1453        case 0:
1454                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1455                break;
1456        default:
1457                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1458                encode_createmode(xdr, arg);
1459        }
1460}
1461
1462static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1463{
1464        __be32 *p;
1465
1466        p = reserve_space(xdr, 4);
1467        switch (delegation_type) {
1468        case 0:
1469                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1470                break;
1471        case FMODE_READ:
1472                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1473                break;
1474        case FMODE_WRITE|FMODE_READ:
1475                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1476                break;
1477        default:
1478                BUG();
1479        }
1480}
1481
1482static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1483{
1484        __be32 *p;
1485
1486        p = reserve_space(xdr, 4);
1487        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1488        encode_string(xdr, name->len, name->name);
1489}
1490
1491static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1492{
1493        __be32 *p;
1494
1495        p = reserve_space(xdr, 4);
1496        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1497        encode_delegation_type(xdr, type);
1498}
1499
1500static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1501{
1502        __be32 *p;
1503
1504        p = reserve_space(xdr, 4);
1505        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1506        encode_nfs4_stateid(xdr, stateid);
1507        encode_string(xdr, name->len, name->name);
1508}
1509
1510static inline void encode_claim_fh(struct xdr_stream *xdr)
1511{
1512        __be32 *p;
1513
1514        p = reserve_space(xdr, 4);
1515        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1516}
1517
1518static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1519{
1520        __be32 *p;
1521
1522        p = reserve_space(xdr, 4);
1523        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524        encode_nfs4_stateid(xdr, stateid);
1525}
1526
1527static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1528{
1529        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1530        encode_openhdr(xdr, arg);
1531        encode_opentype(xdr, arg);
1532        switch (arg->claim) {
1533        case NFS4_OPEN_CLAIM_NULL:
1534                encode_claim_null(xdr, arg->name);
1535                break;
1536        case NFS4_OPEN_CLAIM_PREVIOUS:
1537                encode_claim_previous(xdr, arg->u.delegation_type);
1538                break;
1539        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1540                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1541                break;
1542        case NFS4_OPEN_CLAIM_FH:
1543                encode_claim_fh(xdr);
1544                break;
1545        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1546                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1547                break;
1548        default:
1549                BUG();
1550        }
1551}
1552
1553static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1554{
1555        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1556        encode_nfs4_stateid(xdr, arg->stateid);
1557        encode_nfs4_seqid(xdr, arg->seqid);
1558}
1559
1560static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1561{
1562        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1563        encode_nfs4_stateid(xdr, &arg->stateid);
1564        encode_nfs4_seqid(xdr, arg->seqid);
1565        encode_share_access(xdr, arg->share_access);
1566}
1567
1568static void
1569encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1570{
1571        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1572        encode_string(xdr, fh->size, fh->data);
1573}
1574
1575static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1576{
1577        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1578}
1579
1580static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1581                        struct compound_hdr *hdr)
1582{
1583        __be32 *p;
1584
1585        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1586        encode_nfs4_stateid(xdr, &args->stateid);
1587
1588        p = reserve_space(xdr, 12);
1589        p = xdr_encode_hyper(p, args->offset);
1590        *p = cpu_to_be32(args->count);
1591}
1592
1593static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1594{
1595        uint32_t attrs[3] = {
1596                FATTR4_WORD0_RDATTR_ERROR,
1597                FATTR4_WORD1_MOUNTED_ON_FILEID,
1598        };
1599        uint32_t dircount = readdir->count >> 1;
1600        __be32 *p, verf[2];
1601        uint32_t attrlen = 0;
1602        unsigned int i;
1603
1604        if (readdir->plus) {
1605                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1606                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1607                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1608                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1609                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1610                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1611                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1612                dircount >>= 1;
1613        }
1614        /* Use mounted_on_fileid only if the server supports it */
1615        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1616                attrs[0] |= FATTR4_WORD0_FILEID;
1617        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1618                attrs[i] &= readdir->bitmask[i];
1619                if (attrs[i] != 0)
1620                        attrlen = i+1;
1621        }
1622
1623        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1624        encode_uint64(xdr, readdir->cookie);
1625        encode_nfs4_verifier(xdr, &readdir->verifier);
1626        p = reserve_space(xdr, 12 + (attrlen << 2));
1627        *p++ = cpu_to_be32(dircount);
1628        *p++ = cpu_to_be32(readdir->count);
1629        *p++ = cpu_to_be32(attrlen);
1630        for (i = 0; i < attrlen; i++)
1631                *p++ = cpu_to_be32(attrs[i]);
1632        memcpy(verf, readdir->verifier.data, sizeof(verf));
1633
1634        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1635                        __func__,
1636                        (unsigned long long)readdir->cookie,
1637                        verf[0], verf[1],
1638                        attrs[0] & readdir->bitmask[0],
1639                        attrs[1] & readdir->bitmask[1],
1640                        attrs[2] & readdir->bitmask[2]);
1641}
1642
1643static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1644{
1645        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1646}
1647
1648static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1649{
1650        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1651        encode_string(xdr, name->len, name->name);
1652}
1653
1654static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1655{
1656        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1657        encode_string(xdr, oldname->len, oldname->name);
1658        encode_string(xdr, newname->len, newname->name);
1659}
1660
1661static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1662                         struct compound_hdr *hdr)
1663{
1664        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1665        encode_uint64(xdr, clid);
1666}
1667
1668static void
1669encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670{
1671        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1672}
1673
1674static void
1675encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1676                struct compound_hdr *hdr)
1677{
1678        __be32 *p;
1679
1680        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1681        encode_nfs4_stateid(xdr, &zero_stateid);
1682        p = reserve_space(xdr, 2*4);
1683        *p++ = cpu_to_be32(1);
1684        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1685        p = reserve_space(xdr, 4);
1686        *p = cpu_to_be32(arg->acl_len);
1687        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1688}
1689
1690static void
1691encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1692{
1693        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1694}
1695
1696static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1697{
1698        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1699        encode_nfs4_stateid(xdr, &arg->stateid);
1700        encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1701                        server->attr_bitmask);
1702}
1703
1704static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1705{
1706        __be32 *p;
1707
1708        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1709        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1710
1711        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1712                        setclientid->sc_clnt->cl_owner_id);
1713        p = reserve_space(xdr, 4);
1714        *p = cpu_to_be32(setclientid->sc_prog);
1715        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1716        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1717        p = reserve_space(xdr, 4);
1718        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1719}
1720
1721static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1722{
1723        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1724                        decode_setclientid_confirm_maxsz, hdr);
1725        encode_uint64(xdr, arg->clientid);
1726        encode_nfs4_verifier(xdr, &arg->confirm);
1727}
1728
1729static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1730                         struct compound_hdr *hdr)
1731{
1732        __be32 *p;
1733
1734        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1735        encode_nfs4_stateid(xdr, &args->stateid);
1736
1737        p = reserve_space(xdr, 16);
1738        p = xdr_encode_hyper(p, args->offset);
1739        *p++ = cpu_to_be32(args->stable);
1740        *p = cpu_to_be32(args->count);
1741
1742        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1743}
1744
1745static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1746{
1747        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1748        encode_nfs4_stateid(xdr, stateid);
1749}
1750
1751static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1752{
1753        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1754        encode_string(xdr, name->len, name->name);
1755}
1756
1757#if defined(CONFIG_NFS_V4_1)
1758/* NFSv4.1 operations */
1759static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1760                                   const struct nfs41_bind_conn_to_session_args *args,
1761                                   struct compound_hdr *hdr)
1762{
1763        __be32 *p;
1764
1765        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1766                decode_bind_conn_to_session_maxsz, hdr);
1767        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1768        p = xdr_reserve_space(xdr, 8);
1769        *p++ = cpu_to_be32(args->dir);
1770        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1771}
1772
1773static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1774{
1775        unsigned int i;
1776        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1777        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1778                encode_uint32(xdr, op_map->u.words[i]);
1779}
1780
1781static void encode_exchange_id(struct xdr_stream *xdr,
1782                               const struct nfs41_exchange_id_args *args,
1783                               struct compound_hdr *hdr)
1784{
1785        __be32 *p;
1786        char impl_name[IMPL_NAME_LIMIT];
1787        int len = 0;
1788
1789        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1790        encode_nfs4_verifier(xdr, &args->verifier);
1791
1792        encode_string(xdr, strlen(args->client->cl_owner_id),
1793                        args->client->cl_owner_id);
1794
1795        encode_uint32(xdr, args->flags);
1796        encode_uint32(xdr, args->state_protect.how);
1797
1798        switch (args->state_protect.how) {
1799        case SP4_NONE:
1800                break;
1801        case SP4_MACH_CRED:
1802                encode_op_map(xdr, &args->state_protect.enforce);
1803                encode_op_map(xdr, &args->state_protect.allow);
1804                break;
1805        default:
1806                WARN_ON_ONCE(1);
1807                break;
1808        }
1809
1810        if (send_implementation_id &&
1811            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1812            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1813                <= sizeof(impl_name) + 1)
1814                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1815                               utsname()->sysname, utsname()->release,
1816                               utsname()->version, utsname()->machine);
1817
1818        if (len > 0) {
1819                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1820
1821                encode_string(xdr,
1822                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1823                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1824                encode_string(xdr, len, impl_name);
1825                /* just send zeros for nii_date - the date is in nii_name */
1826                p = reserve_space(xdr, 12);
1827                p = xdr_encode_hyper(p, 0);
1828                *p = cpu_to_be32(0);
1829        } else
1830                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1831}
1832
1833static void encode_create_session(struct xdr_stream *xdr,
1834                                  const struct nfs41_create_session_args *args,
1835                                  struct compound_hdr *hdr)
1836{
1837        __be32 *p;
1838        struct nfs_client *clp = args->client;
1839        struct rpc_clnt *clnt = clp->cl_rpcclient;
1840        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1841        u32 max_resp_sz_cached;
1842
1843        /*
1844         * Assumes OPEN is the biggest non-idempotent compound.
1845         * 2 is the verifier.
1846         */
1847        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1848                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1849
1850        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1851        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1852        p = xdr_encode_hyper(p, args->clientid);
1853        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1854        *p++ = cpu_to_be32(args->flags);                        /*flags */
1855
1856        /* Fore Channel */
1857        *p++ = cpu_to_be32(0);                          /* header padding size */
1858        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1859        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1860        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1861        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1862        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1863        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1864
1865        /* Back Channel */
1866        *p++ = cpu_to_be32(0);                          /* header padding size */
1867        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1868        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1869        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1870        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1871        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1872        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1873
1874        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1875        *p++ = cpu_to_be32(1);
1876        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1877
1878        /* authsys_parms rfc1831 */
1879        *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1880        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1881        *p++ = cpu_to_be32(0);                          /* UID */
1882        *p++ = cpu_to_be32(0);                          /* GID */
1883        *p = cpu_to_be32(0);                            /* No more gids */
1884}
1885
1886static void encode_destroy_session(struct xdr_stream *xdr,
1887                                   const struct nfs4_session *session,
1888                                   struct compound_hdr *hdr)
1889{
1890        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1891        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1892}
1893
1894static void encode_destroy_clientid(struct xdr_stream *xdr,
1895                                   uint64_t clientid,
1896                                   struct compound_hdr *hdr)
1897{
1898        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1899        encode_uint64(xdr, clientid);
1900}
1901
1902static void encode_reclaim_complete(struct xdr_stream *xdr,
1903                                    const struct nfs41_reclaim_complete_args *args,
1904                                    struct compound_hdr *hdr)
1905{
1906        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1907        encode_uint32(xdr, args->one_fs);
1908}
1909#endif /* CONFIG_NFS_V4_1 */
1910
1911static void encode_sequence(struct xdr_stream *xdr,
1912                            const struct nfs4_sequence_args *args,
1913                            struct compound_hdr *hdr)
1914{
1915#if defined(CONFIG_NFS_V4_1)
1916        struct nfs4_session *session;
1917        struct nfs4_slot_table *tp;
1918        struct nfs4_slot *slot = args->sa_slot;
1919        __be32 *p;
1920
1921        tp = slot->table;
1922        session = tp->session;
1923        if (!session)
1924                return;
1925
1926        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1927
1928        /*
1929         * Sessionid + seqid + slotid + max slotid + cache_this
1930         */
1931        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1932                "max_slotid=%d cache_this=%d\n",
1933                __func__,
1934                ((u32 *)session->sess_id.data)[0],
1935                ((u32 *)session->sess_id.data)[1],
1936                ((u32 *)session->sess_id.data)[2],
1937                ((u32 *)session->sess_id.data)[3],
1938                slot->seq_nr, slot->slot_nr,
1939                tp->highest_used_slotid, args->sa_cache_this);
1940        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1941        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1942        *p++ = cpu_to_be32(slot->seq_nr);
1943        *p++ = cpu_to_be32(slot->slot_nr);
1944        *p++ = cpu_to_be32(tp->highest_used_slotid);
1945        *p = cpu_to_be32(args->sa_cache_this);
1946#endif /* CONFIG_NFS_V4_1 */
1947}
1948
1949#ifdef CONFIG_NFS_V4_1
1950static void
1951encode_getdeviceinfo(struct xdr_stream *xdr,
1952                     const struct nfs4_getdeviceinfo_args *args,
1953                     struct compound_hdr *hdr)
1954{
1955        __be32 *p;
1956
1957        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1958        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1959        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1960                                    NFS4_DEVICEID4_SIZE);
1961        *p++ = cpu_to_be32(args->pdev->layout_type);
1962        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1963
1964        p = reserve_space(xdr, 4 + 4);
1965        *p++ = cpu_to_be32(1);                  /* bitmap length */
1966        *p++ = cpu_to_be32(args->notify_types);
1967}
1968
1969static void
1970encode_layoutget(struct xdr_stream *xdr,
1971                      const struct nfs4_layoutget_args *args,
1972                      struct compound_hdr *hdr)
1973{
1974        __be32 *p;
1975
1976        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1977        p = reserve_space(xdr, 36);
1978        *p++ = cpu_to_be32(0);     /* Signal layout available */
1979        *p++ = cpu_to_be32(args->type);
1980        *p++ = cpu_to_be32(args->range.iomode);
1981        p = xdr_encode_hyper(p, args->range.offset);
1982        p = xdr_encode_hyper(p, args->range.length);
1983        p = xdr_encode_hyper(p, args->minlength);
1984        encode_nfs4_stateid(xdr, &args->stateid);
1985        encode_uint32(xdr, args->maxcount);
1986
1987        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1988                __func__,
1989                args->type,
1990                args->range.iomode,
1991                (unsigned long)args->range.offset,
1992                (unsigned long)args->range.length,
1993                args->maxcount);
1994}
1995
1996static int
1997encode_layoutcommit(struct xdr_stream *xdr,
1998                    struct inode *inode,
1999                    const struct nfs4_layoutcommit_args *args,
2000                    struct compound_hdr *hdr)

2001{
2002        __be32 *p;
2003
2004        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2005                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2006
2007        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2008        p = reserve_space(xdr, 20);
2009        /* Only whole file layouts */
2010        p = xdr_encode_hyper(p, 0); /* offset */
2011        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2012        *p = cpu_to_be32(0); /* reclaim */
2013        encode_nfs4_stateid(xdr, &args->stateid);
2014        if (args->lastbytewritten != U64_MAX) {
2015                p = reserve_space(xdr, 20);
2016                *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2017                p = xdr_encode_hyper(p, args->lastbytewritten);
2018        } else {
2019                p = reserve_space(xdr, 12);
2020                *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2021        }
2022        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2023        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2024
2025        encode_uint32(xdr, args->layoutupdate_len);
2026        if (args->layoutupdate_pages)
2027                xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2028                                args->layoutupdate_len);
2029
2030        return 0;
2031}
2032
2033static void
2034encode_layoutreturn(struct xdr_stream *xdr,
2035                    const struct nfs4_layoutreturn_args *args,
2036                    struct compound_hdr *hdr)
2037{
2038        __be32 *p;
2039
2040        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041        p = reserve_space(xdr, 16);
2042        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043        *p++ = cpu_to_be32(args->layout_type);
2044        *p++ = cpu_to_be32(args->range.iomode);
2045        *p = cpu_to_be32(RETURN_FILE);
2046        p = reserve_space(xdr, 16);
2047        p = xdr_encode_hyper(p, args->range.offset);
2048        p = xdr_encode_hyper(p, args->range.length);
2049        spin_lock(&args->inode->i_lock);
2050        encode_nfs4_stateid(xdr, &args->stateid);
2051        spin_unlock(&args->inode->i_lock);
2052        if (args->ld_private->ops && args->ld_private->ops->encode)
2053                args->ld_private->ops->encode(xdr, args, args->ld_private);
2054        else
2055                encode_uint32(xdr, 0);
2056}
2057
2058static int
2059encode_secinfo_no_name(struct xdr_stream *xdr,
2060                       const struct nfs41_secinfo_no_name_args *args,
2061                       struct compound_hdr *hdr)
2062{
2063        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2064        encode_uint32(xdr, args->style);
2065        return 0;
2066}
2067
2068static void encode_test_stateid(struct xdr_stream *xdr,
2069                                const struct nfs41_test_stateid_args *args,
2070                                struct compound_hdr *hdr)
2071{
2072        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2073        encode_uint32(xdr, 1);
2074        encode_nfs4_stateid(xdr, args->stateid);
2075}
2076
2077static void encode_free_stateid(struct xdr_stream *xdr,
2078                                const struct nfs41_free_stateid_args *args,
2079                                struct compound_hdr *hdr)
2080{
2081        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2082        encode_nfs4_stateid(xdr, &args->stateid);
2083}
2084#else
2085static inline void
2086encode_layoutreturn(struct xdr_stream *xdr,
2087                    const struct nfs4_layoutreturn_args *args,
2088                    struct compound_hdr *hdr)
2089{
2090}
2091
2092static void
2093encode_layoutget(struct xdr_stream *xdr,
2094                      const struct nfs4_layoutget_args *args,
2095                      struct compound_hdr *hdr)
2096{
2097}
2098#endif /* CONFIG_NFS_V4_1 */
2099
2100/*
2101 * END OF "GENERIC" ENCODE ROUTINES.
2102 */
2103
2104static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2105{
2106#if defined(CONFIG_NFS_V4_1)
2107        struct nfs4_session *session = args->sa_slot->table->session;
2108        if (session)
2109                return session->clp->cl_mvops->minor_version;
2110#endif /* CONFIG_NFS_V4_1 */
2111        return 0;
2112}
2113
2114/*
2115 * Encode an ACCESS request
2116 */
2117static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2118                                const void *data)
2119{
2120        const struct nfs4_accessargs *args = data;
2121        struct compound_hdr hdr = {
2122                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123        };
2124
2125        encode_compound_hdr(xdr, req, &hdr);
2126        encode_sequence(xdr, &args->seq_args, &hdr);
2127        encode_putfh(xdr, args->fh, &hdr);
2128        encode_access(xdr, args->access, &hdr);
2129        if (args->bitmask)
2130                encode_getfattr(xdr, args->bitmask, &hdr);
2131        encode_nops(&hdr);
2132}
2133
2134/*
2135 * Encode LOOKUP request
2136 */
2137static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2138                                const void *data)
2139{
2140        const struct nfs4_lookup_arg *args = data;
2141        struct compound_hdr hdr = {
2142                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2143        };
2144
2145        encode_compound_hdr(xdr, req, &hdr);
2146        encode_sequence(xdr, &args->seq_args, &hdr);
2147        encode_putfh(xdr, args->dir_fh, &hdr);
2148        encode_lookup(xdr, args->name, &hdr);
2149        encode_getfh(xdr, &hdr);
2150        encode_getfattr(xdr, args->bitmask, &hdr);
2151        encode_nops(&hdr);
2152}
2153
2154/*
2155 * Encode LOOKUPP request
2156 */
2157static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2158                const void *data)
2159{
2160        const struct nfs4_lookupp_arg *args = data;
2161        struct compound_hdr hdr = {
2162                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163        };
2164
2165        encode_compound_hdr(xdr, req, &hdr);
2166        encode_sequence(xdr, &args->seq_args, &hdr);
2167        encode_putfh(xdr, args->fh, &hdr);
2168        encode_lookupp(xdr, &hdr);
2169        encode_getfh(xdr, &hdr);
2170        encode_getfattr(xdr, args->bitmask, &hdr);
2171        encode_nops(&hdr);
2172}
2173
2174/*
2175 * Encode LOOKUP_ROOT request
2176 */
2177static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2178                                     struct xdr_stream *xdr,
2179                                     const void *data)
2180{
2181        const struct nfs4_lookup_root_arg *args = data;
2182        struct compound_hdr hdr = {
2183                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184        };
2185
2186        encode_compound_hdr(xdr, req, &hdr);
2187        encode_sequence(xdr, &args->seq_args, &hdr);
2188        encode_putrootfh(xdr, &hdr);
2189        encode_getfh(xdr, &hdr);
2190        encode_getfattr(xdr, args->bitmask, &hdr);
2191        encode_nops(&hdr);
2192}
2193
2194/*
2195 * Encode REMOVE request
2196 */
2197static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                                const void *data)
2199{
2200        const struct nfs_removeargs *args = data;
2201        struct compound_hdr hdr = {
2202                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203        };
2204
2205        encode_compound_hdr(xdr, req, &hdr);
2206        encode_sequence(xdr, &args->seq_args, &hdr);
2207        encode_putfh(xdr, args->fh, &hdr);
2208        encode_remove(xdr, &args->name, &hdr);
2209        encode_nops(&hdr);
2210}
2211
2212/*
2213 * Encode RENAME request
2214 */
2215static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                                const void *data)
2217{
2218        const struct nfs_renameargs *args = data;
2219        struct compound_hdr hdr = {
2220                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221        };
2222
2223        encode_compound_hdr(xdr, req, &hdr);
2224        encode_sequence(xdr, &args->seq_args, &hdr);
2225        encode_putfh(xdr, args->old_dir, &hdr);
2226        encode_savefh(xdr, &hdr);
2227        encode_putfh(xdr, args->new_dir, &hdr);
2228        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2229        encode_nops(&hdr);
2230}
2231
2232/*
2233 * Encode LINK request
2234 */
2235static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2236                              const void *data)
2237{
2238        const struct nfs4_link_arg *args = data;
2239        struct compound_hdr hdr = {
2240                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241        };
2242
2243        encode_compound_hdr(xdr, req, &hdr);
2244        encode_sequence(xdr, &args->seq_args, &hdr);
2245        encode_putfh(xdr, args->fh, &hdr);
2246        encode_savefh(xdr, &hdr);
2247        encode_putfh(xdr, args->dir_fh, &hdr);
2248        encode_link(xdr, args->name, &hdr);
2249        encode_restorefh(xdr, &hdr);
2250        encode_getfattr(xdr, args->bitmask, &hdr);
2251        encode_nops(&hdr);
2252}
2253
2254/*
2255 * Encode CREATE request
2256 */
2257static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2258                                const void *data)
2259{
2260        const struct nfs4_create_arg *args = data;
2261        struct compound_hdr hdr = {
2262                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263        };
2264
2265        encode_compound_hdr(xdr, req, &hdr);
2266        encode_sequence(xdr, &args->seq_args, &hdr);
2267        encode_putfh(xdr, args->dir_fh, &hdr);
2268        encode_create(xdr, args, &hdr);
2269        encode_getfh(xdr, &hdr);
2270        encode_getfattr(xdr, args->bitmask, &hdr);
2271        encode_nops(&hdr);
2272}
2273
2274/*
2275 * Encode SYMLINK request
2276 */
2277static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2278                                 const void *data)
2279{
2280        const struct nfs4_create_arg *args = data;
2281
2282        nfs4_xdr_enc_create(req, xdr, args);
2283}
2284
2285/*
2286 * Encode GETATTR request
2287 */
2288static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2289                                 const void *data)
2290{
2291        const struct nfs4_getattr_arg *args = data;
2292        struct compound_hdr hdr = {
2293                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294        };
2295
2296        encode_compound_hdr(xdr, req, &hdr);
2297        encode_sequence(xdr, &args->seq_args, &hdr);
2298        encode_putfh(xdr, args->fh, &hdr);
2299        encode_getfattr(xdr, args->bitmask, &hdr);
2300        encode_nops(&hdr);
2301}
2302
2303/*
2304 * Encode a CLOSE request
2305 */
2306static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2307                               const void *data)
2308{
2309        const struct nfs_closeargs *args = data;
2310        struct compound_hdr hdr = {
2311                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312        };
2313
2314        encode_compound_hdr(xdr, req, &hdr);
2315        encode_sequence(xdr, &args->seq_args, &hdr);
2316        encode_putfh(xdr, args->fh, &hdr);
2317        if (args->lr_args)
2318                encode_layoutreturn(xdr, args->lr_args, &hdr);
2319        if (args->bitmask != NULL)
2320                encode_getfattr(xdr, args->bitmask, &hdr);
2321        encode_close(xdr, args, &hdr);
2322        encode_nops(&hdr);
2323}
2324
2325/*
2326 * Encode an OPEN request
2327 */
2328static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2329                              const void *data)
2330{
2331        const struct nfs_openargs *args = data;
2332        struct compound_hdr hdr = {
2333                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334        };
2335
2336        encode_compound_hdr(xdr, req, &hdr);
2337        encode_sequence(xdr, &args->seq_args, &hdr);
2338        encode_putfh(xdr, args->fh, &hdr);
2339        encode_open(xdr, args, &hdr);
2340        encode_getfh(xdr, &hdr);
2341        if (args->access)
2342                encode_access(xdr, args->access, &hdr);
2343        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344        if (args->lg_args) {
2345                encode_layoutget(xdr, args->lg_args, &hdr);
2346                rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2347                                        args->lg_args->layout.pglen,
2348                                        hdr.replen);
2349        }
2350        encode_nops(&hdr);
2351}
2352
2353/*
2354 * Encode an OPEN_CONFIRM request
2355 */
2356static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2357                                      struct xdr_stream *xdr,
2358                                      const void *data)
2359{
2360        const struct nfs_open_confirmargs *args = data;
2361        struct compound_hdr hdr = {
2362                .nops   = 0,
2363        };
2364
2365        encode_compound_hdr(xdr, req, &hdr);
2366        encode_putfh(xdr, args->fh, &hdr);
2367        encode_open_confirm(xdr, args, &hdr);
2368        encode_nops(&hdr);
2369}
2370
2371/*
2372 * Encode an OPEN request with no attributes.
2373 */
2374static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2375                                     struct xdr_stream *xdr,
2376                                     const void *data)
2377{
2378        const struct nfs_openargs *args = data;
2379        struct compound_hdr hdr = {
2380                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381        };
2382
2383        encode_compound_hdr(xdr, req, &hdr);
2384        encode_sequence(xdr, &args->seq_args, &hdr);
2385        encode_putfh(xdr, args->fh, &hdr);
2386        encode_open(xdr, args, &hdr);
2387        if (args->access)
2388                encode_access(xdr, args->access, &hdr);
2389        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2390        if (args->lg_args) {
2391                encode_layoutget(xdr, args->lg_args, &hdr);
2392                rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2393                                        args->lg_args->layout.pglen,
2394                                        hdr.replen);
2395        }
2396        encode_nops(&hdr);
2397}
2398
2399/*
2400 * Encode an OPEN_DOWNGRADE request
2401 */
2402static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2403                                        struct xdr_stream *xdr,
2404                                        const void *data)
2405{
2406        const struct nfs_closeargs *args = data;
2407        struct compound_hdr hdr = {
2408                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409        };
2410
2411        encode_compound_hdr(xdr, req, &hdr);
2412        encode_sequence(xdr, &args->seq_args, &hdr);
2413        encode_putfh(xdr, args->fh, &hdr);
2414        if (args->lr_args)
2415                encode_layoutreturn(xdr, args->lr_args, &hdr);
2416        encode_open_downgrade(xdr, args, &hdr);
2417        encode_nops(&hdr);
2418}
2419
2420/*
2421 * Encode a LOCK request
2422 */
2423static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2424                              const void *data)
2425{
2426        const struct nfs_lock_args *args = data;
2427        struct compound_hdr hdr = {
2428                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429        };
2430
2431        encode_compound_hdr(xdr, req, &hdr);
2432        encode_sequence(xdr, &args->seq_args, &hdr);
2433        encode_putfh(xdr, args->fh, &hdr);
2434        encode_lock(xdr, args, &hdr);
2435        encode_nops(&hdr);
2436}
2437
2438/*
2439 * Encode a LOCKT request
2440 */
2441static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2442                               const void *data)
2443{
2444        const struct nfs_lockt_args *args = data;
2445        struct compound_hdr hdr = {
2446                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2447        };
2448
2449        encode_compound_hdr(xdr, req, &hdr);
2450        encode_sequence(xdr, &args->seq_args, &hdr);
2451        encode_putfh(xdr, args->fh, &hdr);
2452        encode_lockt(xdr, args, &hdr);
2453        encode_nops(&hdr);
2454}
2455
2456/*
2457 * Encode a LOCKU request
2458 */
2459static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2460                               const void *data)
2461{
2462        const struct nfs_locku_args *args = data;
2463        struct compound_hdr hdr = {
2464                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465        };
2466
2467        encode_compound_hdr(xdr, req, &hdr);
2468        encode_sequence(xdr, &args->seq_args, &hdr);
2469        encode_putfh(xdr, args->fh, &hdr);
2470        encode_locku(xdr, args, &hdr);
2471        encode_nops(&hdr);
2472}
2473
2474static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2475                                           struct xdr_stream *xdr,
2476                                           const void *data)
2477{
2478        const struct nfs_release_lockowner_args *args = data;
2479        struct compound_hdr hdr = {
2480                .minorversion = 0,
2481        };
2482
2483        encode_compound_hdr(xdr, req, &hdr);
2484        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2485        encode_nops(&hdr);
2486}
2487
2488/*
2489 * Encode a READLINK request
2490 */
2491static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                  const void *data)
2493{
2494        const struct nfs4_readlink *args = data;
2495        struct compound_hdr hdr = {
2496                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497        };
2498
2499        encode_compound_hdr(xdr, req, &hdr);
2500        encode_sequence(xdr, &args->seq_args, &hdr);
2501        encode_putfh(xdr, args->fh, &hdr);
2502        encode_readlink(xdr, args, req, &hdr);
2503
2504        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2505                                args->pglen, hdr.replen);
2506        encode_nops(&hdr);
2507}
2508
2509/*
2510 * Encode a READDIR request
2511 */
2512static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2513                                 const void *data)
2514{
2515        const struct nfs4_readdir_arg *args = data;
2516        struct compound_hdr hdr = {
2517                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2518        };
2519
2520        encode_compound_hdr(xdr, req, &hdr);
2521        encode_sequence(xdr, &args->seq_args, &hdr);
2522        encode_putfh(xdr, args->fh, &hdr);
2523        encode_readdir(xdr, args, req, &hdr);
2524
2525        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2526                                args->count, hdr.replen);
2527        encode_nops(&hdr);
2528}
2529
2530/*
2531 * Encode a READ request
2532 */
2533static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                              const void *data)
2535{
2536        const struct nfs_pgio_args *args = data;
2537        struct compound_hdr hdr = {
2538                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539        };
2540
2541        encode_compound_hdr(xdr, req, &hdr);
2542        encode_sequence(xdr, &args->seq_args, &hdr);
2543        encode_putfh(xdr, args->fh, &hdr);
2544        encode_read(xdr, args, &hdr);
2545
2546        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2547                                args->count, hdr.replen);
2548        req->rq_rcv_buf.flags |= XDRBUF_READ;
2549        encode_nops(&hdr);
2550}
2551
2552/*
2553 * Encode an SETATTR request
2554 */
2555static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                 const void *data)
2557{
2558        const struct nfs_setattrargs *args = data;
2559        struct compound_hdr hdr = {
2560                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561        };
2562
2563        encode_compound_hdr(xdr, req, &hdr);
2564        encode_sequence(xdr, &args->seq_args, &hdr);
2565        encode_putfh(xdr, args->fh, &hdr);
2566        encode_setattr(xdr, args, args->server, &hdr);
2567        encode_getfattr(xdr, args->bitmask, &hdr);
2568        encode_nops(&hdr);
2569}
2570
2571/*
2572 * Encode a GETACL request
2573 */
2574static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                const void *data)
2576{
2577        const struct nfs_getaclargs *args = data;
2578        struct compound_hdr hdr = {
2579                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580        };
2581        const __u32 nfs4_acl_bitmap[1] = {
2582                [0] = FATTR4_WORD0_ACL,
2583        };
2584        uint32_t replen;
2585
2586        encode_compound_hdr(xdr, req, &hdr);
2587        encode_sequence(xdr, &args->seq_args, &hdr);
2588        encode_putfh(xdr, args->fh, &hdr);
2589        replen = hdr.replen + op_decode_hdr_maxsz;
2590        encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591                        ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593        rpc_prepare_reply_pages(req, args->acl_pages, 0,
2594                                args->acl_len, replen + 1);
2595        encode_nops(&hdr);
2596}
2597
2598/*
2599 * Encode a WRITE request
2600 */
2601static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2602                               const void *data)
2603{
2604        const struct nfs_pgio_args *args = data;
2605        struct compound_hdr hdr = {
2606                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2607        };
2608
2609        encode_compound_hdr(xdr, req, &hdr);
2610        encode_sequence(xdr, &args->seq_args, &hdr);
2611        encode_putfh(xdr, args->fh, &hdr);
2612        encode_write(xdr, args, &hdr);
2613        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2614        if (args->bitmask)
2615                encode_getfattr(xdr, args->bitmask, &hdr);
2616        encode_nops(&hdr);
2617}
2618
2619/*
2620 *  a COMMIT request
2621 */
2622static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2623                                const void *data)
2624{
2625        const struct nfs_commitargs *args = data;
2626        struct compound_hdr hdr = {
2627                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628        };
2629
2630        encode_compound_hdr(xdr, req, &hdr);
2631        encode_sequence(xdr, &args->seq_args, &hdr);
2632        encode_putfh(xdr, args->fh, &hdr);
2633        encode_commit(xdr, args, &hdr);
2634        encode_nops(&hdr);
2635}
2636
2637/*
2638 * FSINFO request
2639 */
2640static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2641                                const void *data)
2642{
2643        const struct nfs4_fsinfo_arg *args = data;
2644        struct compound_hdr hdr = {
2645                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2646        };
2647
2648        encode_compound_hdr(xdr, req, &hdr);
2649        encode_sequence(xdr, &args->seq_args, &hdr);
2650        encode_putfh(xdr, args->fh, &hdr);
2651        encode_fsinfo(xdr, args->bitmask, &hdr);
2652        encode_nops(&hdr);
2653}
2654
2655/*
2656 * a PATHCONF request
2657 */
2658static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2659                                  const void *data)
2660{
2661        const struct nfs4_pathconf_arg *args = data;
2662        struct compound_hdr hdr = {
2663                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664        };
2665
2666        encode_compound_hdr(xdr, req, &hdr);
2667        encode_sequence(xdr, &args->seq_args, &hdr);
2668        encode_putfh(xdr, args->fh, &hdr);
2669        encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2670                        ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2671        encode_nops(&hdr);
2672}
2673
2674/*
2675 * a STATFS request
2676 */
2677static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2678                                const void *data)
2679{
2680        const struct nfs4_statfs_arg *args = data;
2681        struct compound_hdr hdr = {
2682                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683        };
2684
2685        encode_compound_hdr(xdr, req, &hdr);
2686        encode_sequence(xdr, &args->seq_args, &hdr);
2687        encode_putfh(xdr, args->fh, &hdr);
2688        encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2689                        ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2690        encode_nops(&hdr);
2691}
2692
2693/*
2694 * GETATTR_BITMAP request
2695 */
2696static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2697                                     struct xdr_stream *xdr,
2698                                     const void *data)
2699{
2700        const struct nfs4_server_caps_arg *args = data;
2701        const u32 *bitmask = args->bitmask;
2702        struct compound_hdr hdr = {
2703                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2704        };
2705
2706        encode_compound_hdr(xdr, req, &hdr);
2707        encode_sequence(xdr, &args->seq_args, &hdr);
2708        encode_putfh(xdr, args->fhandle, &hdr);
2709        encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2710        encode_nops(&hdr);
2711}
2712
2713/*
2714 * a RENEW request
2715 */
2716static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2717                               const void *data)
2718
2719{
2720        const struct nfs_client *clp = data;
2721        struct compound_hdr hdr = {
2722                .nops   = 0,
2723        };
2724
2725        encode_compound_hdr(xdr, req, &hdr);
2726        encode_renew(xdr, clp->cl_clientid, &hdr);
2727        encode_nops(&hdr);
2728}
2729
2730/*
2731 * a SETCLIENTID request
2732 */
2733static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2734                                     struct xdr_stream *xdr,
2735                                     const void *data)
2736{
2737        const struct nfs4_setclientid *sc = data;
2738        struct compound_hdr hdr = {
2739                .nops   = 0,
2740        };
2741
2742        encode_compound_hdr(xdr, req, &hdr);
2743        encode_setclientid(xdr, sc, &hdr);
2744        encode_nops(&hdr);
2745}
2746
2747/*
2748 * a SETCLIENTID_CONFIRM request
2749 */
2750static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2751                                             struct xdr_stream *xdr,
2752                                             const void *data)
2753{
2754        const struct nfs4_setclientid_res *arg = data;
2755        struct compound_hdr hdr = {
2756                .nops   = 0,
2757        };
2758
2759        encode_compound_hdr(xdr, req, &hdr);
2760        encode_setclientid_confirm(xdr, arg, &hdr);
2761        encode_nops(&hdr);
2762}
2763
2764/*
2765 * DELEGRETURN request
2766 */
2767static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2768                                     struct xdr_stream *xdr,
2769                                     const void *data)
2770{
2771        const struct nfs4_delegreturnargs *args = data;
2772        struct compound_hdr hdr = {
2773                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774        };
2775
2776        encode_compound_hdr(xdr, req, &hdr);
2777        encode_sequence(xdr, &args->seq_args, &hdr);
2778        encode_putfh(xdr, args->fhandle, &hdr);
2779        if (args->lr_args)
2780                encode_layoutreturn(xdr, args->lr_args, &hdr);
2781        if (args->bitmask)
2782                encode_getfattr(xdr, args->bitmask, &hdr);
2783        encode_delegreturn(xdr, args->stateid, &hdr);
2784        encode_nops(&hdr);
2785}
2786
2787/*
2788 * Encode FS_LOCATIONS request
2789 */
2790static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2791                                      struct xdr_stream *xdr,
2792                                      const void *data)
2793{
2794        const struct nfs4_fs_locations_arg *args = data;
2795        struct compound_hdr hdr = {
2796                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2797        };
2798        uint32_t replen;
2799
2800        encode_compound_hdr(xdr, req, &hdr);
2801        encode_sequence(xdr, &args->seq_args, &hdr);
2802        if (args->migration) {
2803                encode_putfh(xdr, args->fh, &hdr);
2804                replen = hdr.replen;
2805                encode_fs_locations(xdr, args->bitmask, &hdr);
2806                if (args->renew)
2807                        encode_renew(xdr, args->clientid, &hdr);
2808        } else {
2809                encode_putfh(xdr, args->dir_fh, &hdr);
2810                encode_lookup(xdr, args->name, &hdr);
2811                replen = hdr.replen;
2812                encode_fs_locations(xdr, args->bitmask, &hdr);
2813        }
2814
2815        rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2816                                PAGE_SIZE, replen + 1);
2817        encode_nops(&hdr);
2818}
2819
2820/*
2821 * Encode SECINFO request
2822 */
2823static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2824                                struct xdr_stream *xdr,
2825                                const void *data)
2826{
2827        const struct nfs4_secinfo_arg *args = data;
2828        struct compound_hdr hdr = {
2829                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2830        };
2831
2832        encode_compound_hdr(xdr, req, &hdr);
2833        encode_sequence(xdr, &args->seq_args, &hdr);
2834        encode_putfh(xdr, args->dir_fh, &hdr);
2835        encode_secinfo(xdr, args->name, &hdr);
2836        encode_nops(&hdr);
2837}
2838
2839/*
2840 * Encode FSID_PRESENT request
2841 */
2842static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2843                                      struct xdr_stream *xdr,
2844                                      const void *data)
2845{
2846        const struct nfs4_fsid_present_arg *args = data;
2847        struct compound_hdr hdr = {
2848                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849        };
2850
2851        encode_compound_hdr(xdr, req, &hdr);
2852        encode_sequence(xdr, &args->seq_args, &hdr);
2853        encode_putfh(xdr, args->fh, &hdr);
2854        encode_getfh(xdr, &hdr);
2855        if (args->renew)
2856                encode_renew(xdr, args->clientid, &hdr);
2857        encode_nops(&hdr);
2858}
2859
2860#if defined(CONFIG_NFS_V4_1)
2861/*
2862 * BIND_CONN_TO_SESSION request
2863 */
2864static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2865                                struct xdr_stream *xdr,
2866                                const void *data)
2867{
2868        const struct nfs41_bind_conn_to_session_args *args = data;
2869        struct compound_hdr hdr = {
2870                .minorversion = args->client->cl_mvops->minor_version,
2871        };
2872
2873        encode_compound_hdr(xdr, req, &hdr);
2874        encode_bind_conn_to_session(xdr, args, &hdr);
2875        encode_nops(&hdr);
2876}
2877
2878/*
2879 * EXCHANGE_ID request
2880 */
2881static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2882                                     struct xdr_stream *xdr,
2883                                     const void *data)
2884{
2885        const struct nfs41_exchange_id_args *args = data;
2886        struct compound_hdr hdr = {
2887                .minorversion = args->client->cl_mvops->minor_version,
2888        };
2889
2890        encode_compound_hdr(xdr, req, &hdr);
2891        encode_exchange_id(xdr, args, &hdr);
2892        encode_nops(&hdr);
2893}
2894
2895/*
2896 * a CREATE_SESSION request
2897 */
2898static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2899                                        struct xdr_stream *xdr,
2900                                        const void *data)
2901{
2902        const struct nfs41_create_session_args *args = data;
2903        struct compound_hdr hdr = {
2904                .minorversion = args->client->cl_mvops->minor_version,
2905        };
2906
2907        encode_compound_hdr(xdr, req, &hdr);
2908        encode_create_session(xdr, args, &hdr);
2909        encode_nops(&hdr);
2910}
2911
2912/*
2913 * a DESTROY_SESSION request
2914 */
2915static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2916                                         struct xdr_stream *xdr,
2917                                         const void *data)
2918{
2919        const struct nfs4_session *session = data;
2920        struct compound_hdr hdr = {
2921                .minorversion = session->clp->cl_mvops->minor_version,
2922        };
2923
2924        encode_compound_hdr(xdr, req, &hdr);
2925        encode_destroy_session(xdr, session, &hdr);
2926        encode_nops(&hdr);
2927}
2928
2929/*
2930 * a DESTROY_CLIENTID request
2931 */
2932static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2933                                         struct xdr_stream *xdr,
2934                                         const void *data)
2935{
2936        const struct nfs_client *clp = data;
2937        struct compound_hdr hdr = {
2938                .minorversion = clp->cl_mvops->minor_version,
2939        };
2940
2941        encode_compound_hdr(xdr, req, &hdr);
2942        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2943        encode_nops(&hdr);
2944}
2945
2946/*
2947 * a SEQUENCE request
2948 */
2949static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2950                                  const void *data)
2951{
2952        const struct nfs4_sequence_args *args = data;
2953        struct compound_hdr hdr = {
2954                .minorversion = nfs4_xdr_minorversion(args),
2955        };
2956
2957        encode_compound_hdr(xdr, req, &hdr);
2958        encode_sequence(xdr, args, &hdr);
2959        encode_nops(&hdr);
2960}
2961
2962#endif
2963
2964/*
2965 * a GET_LEASE_TIME request
2966 */
2967static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968                                        struct xdr_stream *xdr,
2969                                        const void *data)
2970{
2971        const struct nfs4_get_lease_time_args *args = data;
2972        struct compound_hdr hdr = {
2973                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974        };
2975        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977        encode_compound_hdr(xdr, req, &hdr);
2978        encode_sequence(xdr, &args->la_seq_args, &hdr);
2979        encode_putrootfh(xdr, &hdr);
2980        encode_fsinfo(xdr, lease_bitmap, &hdr);
2981        encode_nops(&hdr);
2982}
2983
2984#ifdef CONFIG_NFS_V4_1
2985
2986/*
2987 * a RECLAIM_COMPLETE request
2988 */
2989static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2990                                          struct xdr_stream *xdr,
2991                                          const void *data)
2992{
2993        const struct nfs41_reclaim_complete_args *args = data;
2994        struct compound_hdr hdr = {
2995                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2996        };
2997
2998        encode_compound_hdr(xdr, req, &hdr);
2999        encode_sequence(xdr, &args->seq_args, &hdr);
3000        encode_reclaim_complete(xdr, args, &hdr);

3001        encode_nops(&hdr);
3002}
3003
3004/*
3005 * Encode GETDEVICEINFO request
3006 */
3007static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3008                                       struct xdr_stream *xdr,
3009                                       const void *data)
3010{
3011        const struct nfs4_getdeviceinfo_args *args = data;
3012        struct compound_hdr hdr = {
3013                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014        };
3015
3016        encode_compound_hdr(xdr, req, &hdr);
3017        encode_sequence(xdr, &args->seq_args, &hdr);
3018        encode_getdeviceinfo(xdr, args, &hdr);
3019
3020        /* set up reply kvec. Subtract notification bitmap max size (2)
3021         * so that notification bitmap is put in xdr_buf tail */
3022        rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3023                                args->pdev->pglen, hdr.replen - 2);
3024        encode_nops(&hdr);
3025}
3026
3027/*
3028 *  Encode LAYOUTGET request
3029 */
3030static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031                                   struct xdr_stream *xdr,
3032                                   const void *data)
3033{
3034        const struct nfs4_layoutget_args *args = data;
3035        struct compound_hdr hdr = {
3036                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037        };
3038
3039        encode_compound_hdr(xdr, req, &hdr);
3040        encode_sequence(xdr, &args->seq_args, &hdr);
3041        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042        encode_layoutget(xdr, args, &hdr);
3043
3044        rpc_prepare_reply_pages(req, args->layout.pages, 0,
3045                                args->layout.pglen, hdr.replen);
3046        encode_nops(&hdr);
3047}
3048
3049/*
3050 *  Encode LAYOUTCOMMIT request
3051 */
3052static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3053                                      struct xdr_stream *xdr,
3054                                      const void *priv)
3055{
3056        const struct nfs4_layoutcommit_args *args = priv;
3057        struct nfs4_layoutcommit_data *data =
3058                container_of(args, struct nfs4_layoutcommit_data, args);
3059        struct compound_hdr hdr = {
3060                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3061        };
3062
3063        encode_compound_hdr(xdr, req, &hdr);
3064        encode_sequence(xdr, &args->seq_args, &hdr);
3065        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3066        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3067        encode_getfattr(xdr, args->bitmask, &hdr);
3068        encode_nops(&hdr);
3069}
3070
3071/*
3072 * Encode LAYOUTRETURN request
3073 */
3074static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3075                                      struct xdr_stream *xdr,
3076                                      const void *data)
3077{
3078        const struct nfs4_layoutreturn_args *args = data;
3079        struct compound_hdr hdr = {
3080                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3081        };
3082
3083        encode_compound_hdr(xdr, req, &hdr);
3084        encode_sequence(xdr, &args->seq_args, &hdr);
3085        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3086        encode_layoutreturn(xdr, args, &hdr);
3087        encode_nops(&hdr);
3088}
3089
3090/*
3091 * Encode SECINFO_NO_NAME request
3092 */
3093static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3094                                        struct xdr_stream *xdr,
3095                                        const void *data)
3096{
3097        const struct nfs41_secinfo_no_name_args *args = data;
3098        struct compound_hdr hdr = {
3099                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3100        };
3101
3102        encode_compound_hdr(xdr, req, &hdr);
3103        encode_sequence(xdr, &args->seq_args, &hdr);
3104        encode_putrootfh(xdr, &hdr);
3105        encode_secinfo_no_name(xdr, args, &hdr);
3106        encode_nops(&hdr);
3107}
3108
3109/*
3110 *  Encode TEST_STATEID request
3111 */
3112static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3113                                      struct xdr_stream *xdr,
3114                                      const void *data)
3115{
3116        const struct nfs41_test_stateid_args *args = data;
3117        struct compound_hdr hdr = {
3118                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3119        };
3120
3121        encode_compound_hdr(xdr, req, &hdr);
3122        encode_sequence(xdr, &args->seq_args, &hdr);
3123        encode_test_stateid(xdr, args, &hdr);
3124        encode_nops(&hdr);
3125}
3126
3127/*
3128 *  Encode FREE_STATEID request
3129 */
3130static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3131                                     struct xdr_stream *xdr,
3132                                     const void *data)
3133{
3134        const struct nfs41_free_stateid_args *args = data;
3135        struct compound_hdr hdr = {
3136                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3137        };
3138
3139        encode_compound_hdr(xdr, req, &hdr);
3140        encode_sequence(xdr, &args->seq_args, &hdr);
3141        encode_free_stateid(xdr, args, &hdr);
3142        encode_nops(&hdr);
3143}
3144#endif /* CONFIG_NFS_V4_1 */
3145
3146static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3147{
3148        ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3149                        NFS4_OPAQUE_LIMIT);
3150        if (unlikely(ret < 0))
3151                return -EIO;
3152        *len = ret;
3153        return 0;
3154}
3155
3156static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3157{
3158        __be32 *p;
3159
3160        p = xdr_inline_decode(xdr, 8);
3161        if (unlikely(!p))
3162                return -EIO;
3163        hdr->status = be32_to_cpup(p++);
3164        hdr->taglen = be32_to_cpup(p);
3165
3166        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3167        if (unlikely(!p))
3168                return -EIO;
3169        hdr->tag = (char *)p;
3170        p += XDR_QUADLEN(hdr->taglen);
3171        hdr->nops = be32_to_cpup(p);
3172        if (unlikely(hdr->nops < 1))
3173                return nfs4_stat_to_errno(hdr->status);
3174        return 0;
3175}
3176
3177static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3178                int *nfs_retval)
3179{
3180        __be32 *p;
3181        uint32_t opnum;
3182        int32_t nfserr;
3183
3184        p = xdr_inline_decode(xdr, 8);
3185        if (unlikely(!p))
3186                goto out_overflow;
3187        opnum = be32_to_cpup(p++);
3188        if (unlikely(opnum != expected))
3189                goto out_bad_operation;
3190        if (unlikely(*p != cpu_to_be32(NFS_OK)))
3191                goto out_status;
3192        *nfs_retval = 0;
3193        return true;
3194out_status:
3195        nfserr = be32_to_cpup(p);
3196        trace_nfs4_xdr_status(xdr, opnum, nfserr);
3197        *nfs_retval = nfs4_stat_to_errno(nfserr);
3198        return true;
3199out_bad_operation:
3200        dprintk("nfs: Server returned operation"
3201                " %d but we issued a request for %d\n",
3202                        opnum, expected);
3203        *nfs_retval = -EREMOTEIO;
3204        return false;
3205out_overflow:
3206        *nfs_retval = -EIO;
3207        return false;
3208}
3209
3210static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3211{
3212        int retval;
3213
3214        __decode_op_hdr(xdr, expected, &retval);
3215        return retval;
3216}
3217
3218/* Dummy routine */
3219static int decode_ace(struct xdr_stream *xdr, void *ace)
3220{
3221        __be32 *p;
3222        unsigned int strlen;
3223        char *str;
3224
3225        p = xdr_inline_decode(xdr, 12);
3226        if (unlikely(!p))
3227                return -EIO;
3228        return decode_opaque_inline(xdr, &strlen, &str);
3229}
3230
3231static ssize_t
3232decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3233{
3234        ssize_t ret;
3235
3236        ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3237        if (likely(ret >= 0))
3238                return ret;
3239        if (ret != -EMSGSIZE)
3240                return -EIO;
3241        return sz;
3242}
3243
3244static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3245{
3246        ssize_t ret;
3247        ret = decode_bitmap4(xdr, bitmap, 3);
3248        return ret < 0 ? ret : 0;
3249}
3250
3251static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3252{
3253        __be32 *p;
3254
3255        p = xdr_inline_decode(xdr, 4);
3256        if (unlikely(!p))
3257                return -EIO;
3258        *attrlen = be32_to_cpup(p);
3259        *savep = xdr_stream_pos(xdr);
3260        return 0;
3261}
3262
3263static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3264{
3265        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3266                int ret;
3267                ret = decode_attr_bitmap(xdr, bitmask);
3268                if (unlikely(ret < 0))
3269                        return ret;
3270                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3271        } else
3272                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3273        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3274                bitmask[0], bitmask[1], bitmask[2]);
3275        return 0;
3276}
3277
3278static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3279{
3280        __be32 *p;
3281        int ret = 0;
3282
3283        *type = 0;
3284        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3285                return -EIO;
3286        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3287                p = xdr_inline_decode(xdr, 4);
3288                if (unlikely(!p))
3289                        return -EIO;
3290                *type = be32_to_cpup(p);
3291                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3292                        dprintk("%s: bad type %d\n", __func__, *type);
3293                        return -EIO;
3294                }
3295                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3296                ret = NFS_ATTR_FATTR_TYPE;
3297        }
3298        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3299        return ret;
3300}
3301
3302static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3303                                      uint32_t *bitmap, uint32_t *type)
3304{
3305        __be32 *p;
3306
3307        *type = 0;
3308        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3309                return -EIO;
3310        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3311                p = xdr_inline_decode(xdr, 4);
3312                if (unlikely(!p))
3313                        return -EIO;
3314                *type = be32_to_cpup(p);
3315                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3316        }
3317        dprintk("%s: expire type=0x%x\n", __func__, *type);
3318        return 0;
3319}
3320
3321static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3322{
3323        __be32 *p;
3324        int ret = 0;
3325
3326        *change = 0;
3327        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3328                return -EIO;
3329        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3330                p = xdr_inline_decode(xdr, 8);
3331                if (unlikely(!p))
3332                        return -EIO;
3333                xdr_decode_hyper(p, change);
3334                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3335                ret = NFS_ATTR_FATTR_CHANGE;
3336        }
3337        dprintk("%s: change attribute=%Lu\n", __func__,
3338                        (unsigned long long)*change);
3339        return ret;
3340}
3341
3342static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3343{
3344        __be32 *p;
3345        int ret = 0;
3346
3347        *size = 0;
3348        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3349                return -EIO;
3350        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3351                p = xdr_inline_decode(xdr, 8);
3352                if (unlikely(!p))
3353                        return -EIO;
3354                xdr_decode_hyper(p, size);
3355                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3356                ret = NFS_ATTR_FATTR_SIZE;
3357        }
3358        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3359        return ret;
3360}
3361
3362static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363{
3364        __be32 *p;
3365
3366        *res = 0;
3367        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3368                return -EIO;
3369        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3370                p = xdr_inline_decode(xdr, 4);
3371                if (unlikely(!p))
3372                        return -EIO;
3373                *res = be32_to_cpup(p);
3374                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3375        }
3376        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3377        return 0;
3378}
3379
3380static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381{
3382        __be32 *p;
3383
3384        *res = 0;
3385        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3386                return -EIO;
3387        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3388                p = xdr_inline_decode(xdr, 4);
3389                if (unlikely(!p))
3390                        return -EIO;
3391                *res = be32_to_cpup(p);
3392                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3393        }
3394        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3395        return 0;
3396}
3397
3398static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3399{
3400        __be32 *p;
3401        int ret = 0;
3402
3403        fsid->major = 0;
3404        fsid->minor = 0;
3405        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3406                return -EIO;
3407        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3408                p = xdr_inline_decode(xdr, 16);
3409                if (unlikely(!p))
3410                        return -EIO;
3411                p = xdr_decode_hyper(p, &fsid->major);
3412                xdr_decode_hyper(p, &fsid->minor);
3413                bitmap[0] &= ~FATTR4_WORD0_FSID;
3414                ret = NFS_ATTR_FATTR_FSID;
3415        }
3416        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3417                        (unsigned long long)fsid->major,
3418                        (unsigned long long)fsid->minor);
3419        return ret;
3420}
3421
3422static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3423{
3424        __be32 *p;
3425
3426        *res = 60;
3427        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3428                return -EIO;
3429        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3430                p = xdr_inline_decode(xdr, 4);
3431                if (unlikely(!p))
3432                        return -EIO;
3433                *res = be32_to_cpup(p);
3434                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3435        }
3436        dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3437        return 0;
3438}
3439
3440static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3441{
3442        __be32 *p;
3443
3444        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3445                return -EIO;
3446        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3447                p = xdr_inline_decode(xdr, 4);
3448                if (unlikely(!p))
3449                        return -EIO;
3450                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3451                *res = -be32_to_cpup(p);
3452        }
3453        return 0;
3454}
3455
3456static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3457                                 uint32_t *bitmap, uint32_t *bitmask)
3458{
3459        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3460                int ret;
3461                ret = decode_attr_bitmap(xdr, bitmask);
3462                if (unlikely(ret < 0))
3463                        return ret;
3464                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3465        } else
3466                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3467        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3468                bitmask[0], bitmask[1], bitmask[2]);
3469        return 0;
3470}
3471
3472static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3473{
3474        __be32 *p;
3475        u32 len;
3476
3477        if (fh != NULL)
3478                memset(fh, 0, sizeof(*fh));
3479
3480        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3481                return -EIO;
3482        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3483                p = xdr_inline_decode(xdr, 4);
3484                if (unlikely(!p))
3485                        return -EIO;
3486                len = be32_to_cpup(p);
3487                if (len > NFS4_FHSIZE)
3488                        return -EIO;
3489                p = xdr_inline_decode(xdr, len);
3490                if (unlikely(!p))
3491                        return -EIO;
3492                if (fh != NULL) {
3493                        memcpy(fh->data, p, len);
3494                        fh->size = len;
3495                }
3496                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3497        }
3498        return 0;
3499}
3500
3501static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3502{
3503        __be32 *p;
3504
3505        *res = 0;
3506        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3507                return -EIO;
3508        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3509                p = xdr_inline_decode(xdr, 4);
3510                if (unlikely(!p))
3511                        return -EIO;
3512                *res = be32_to_cpup(p);
3513                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3514        }
3515        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3516        return 0;
3517}
3518
3519static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3520{
3521        __be32 *p;
3522        int ret = 0;
3523
3524        *fileid = 0;
3525        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3526                return -EIO;
3527        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3528                p = xdr_inline_decode(xdr, 8);
3529                if (unlikely(!p))
3530                        return -EIO;
3531                xdr_decode_hyper(p, fileid);
3532                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3533                ret = NFS_ATTR_FATTR_FILEID;
3534        }
3535        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3536        return ret;
3537}
3538
3539static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3540{
3541        __be32 *p;
3542        int ret = 0;
3543
3544        *fileid = 0;
3545        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3546                return -EIO;
3547        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3548                p = xdr_inline_decode(xdr, 8);
3549                if (unlikely(!p))
3550                        return -EIO;
3551                xdr_decode_hyper(p, fileid);
3552                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3553                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3554        }
3555        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3556        return ret;
3557}
3558
3559static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3560{
3561        __be32 *p;
3562        int status = 0;
3563
3564        *res = 0;
3565        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3566                return -EIO;
3567        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3568                p = xdr_inline_decode(xdr, 8);
3569                if (unlikely(!p))
3570                        return -EIO;
3571                xdr_decode_hyper(p, res);
3572                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3573        }
3574        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3575        return status;
3576}
3577
3578static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3579{
3580        __be32 *p;
3581        int status = 0;
3582
3583        *res = 0;
3584        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3585                return -EIO;
3586        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3587                p = xdr_inline_decode(xdr, 8);
3588                if (unlikely(!p))
3589                        return -EIO;
3590                xdr_decode_hyper(p, res);
3591                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3592        }
3593        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3594        return status;
3595}
3596
3597static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3598{
3599        __be32 *p;
3600        int status = 0;
3601
3602        *res = 0;
3603        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3604                return -EIO;
3605        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3606                p = xdr_inline_decode(xdr, 8);
3607                if (unlikely(!p))
3608                        return -EIO;
3609                xdr_decode_hyper(p, res);
3610                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3611        }
3612        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3613        return status;
3614}
3615
3616static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3617{
3618        u32 n;
3619        __be32 *p;
3620        int status = 0;
3621
3622        p = xdr_inline_decode(xdr, 4);
3623        if (unlikely(!p))
3624                return -EIO;
3625        n = be32_to_cpup(p);
3626        if (n == 0)
3627                goto root_path;
3628        dprintk("pathname4: ");
3629        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3630                dprintk("cannot parse %d components in path\n", n);
3631                goto out_eio;
3632        }
3633        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3634                struct nfs4_string *component = &path->components[path->ncomponents];
3635                status = decode_opaque_inline(xdr, &component->len, &component->data);
3636                if (unlikely(status != 0))
3637                        goto out_eio;
3638                ifdebug (XDR)
3639                        pr_cont("%s%.*s ",
3640                                (path->ncomponents != n ? "/ " : ""),
3641                                component->len, component->data);
3642        }
3643out:
3644        return status;
3645root_path:
3646/* a root pathname is sent as a zero component4 */
3647        path->ncomponents = 1;
3648        path->components[0].len=0;
3649        path->components[0].data=NULL;
3650        dprintk("pathname4: /\n");
3651        goto out;
3652out_eio:
3653        dprintk(" status %d", status);
3654        status = -EIO;
3655        goto out;
3656}
3657
3658static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3659{
3660        int n;
3661        __be32 *p;
3662        int status = -EIO;
3663
3664        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3665                goto out;
3666        status = 0;
3667        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3668                goto out;
3669        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3670        status = -EIO;
3671        /* Ignore borken servers that return unrequested attrs */
3672        if (unlikely(res == NULL))
3673                goto out;
3674        dprintk("%s: fsroot:\n", __func__);
3675        status = decode_pathname(xdr, &res->fs_path);
3676        if (unlikely(status != 0))
3677                goto out;
3678        p = xdr_inline_decode(xdr, 4);
3679        if (unlikely(!p))
3680                goto out_eio;
3681        n = be32_to_cpup(p);
3682        if (n <= 0)
3683                goto out_eio;
3684        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3685                u32 m;
3686                struct nfs4_fs_location *loc;
3687
3688                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3689                        break;
3690                loc = &res->locations[res->nlocations];
3691                p = xdr_inline_decode(xdr, 4);
3692                if (unlikely(!p))
3693                        goto out_eio;
3694                m = be32_to_cpup(p);
3695
3696                dprintk("%s: servers:\n", __func__);
3697                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3698                        struct nfs4_string *server;
3699
3700                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3701                                unsigned int i;
3702                                dprintk("%s: using first %u of %u servers "
3703                                        "returned for location %u\n",
3704                                                __func__,
3705                                                NFS4_FS_LOCATION_MAXSERVERS,
3706                                                m, res->nlocations);
3707                                for (i = loc->nservers; i < m; i++) {
3708                                        unsigned int len;
3709                                        char *data;
3710                                        status = decode_opaque_inline(xdr, &len, &data);
3711                                        if (unlikely(status != 0))
3712                                                goto out_eio;
3713                                }
3714                                break;
3715                        }
3716                        server = &loc->servers[loc->nservers];
3717                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3718                        if (unlikely(status != 0))
3719                                goto out_eio;
3720                        dprintk("%s ", server->data);
3721                }
3722                status = decode_pathname(xdr, &loc->rootpath);
3723                if (unlikely(status != 0))
3724                        goto out_eio;
3725        }
3726        if (res->nlocations != 0)
3727                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3728out:
3729        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3730        return status;
3731out_eio:
3732        status = -EIO;
3733        goto out;
3734}
3735
3736static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3737{
3738        __be32 *p;
3739        int status = 0;
3740
3741        *res = 0;
3742        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3743                return -EIO;
3744        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3745                p = xdr_inline_decode(xdr, 8);
3746                if (unlikely(!p))
3747                        return -EIO;
3748                xdr_decode_hyper(p, res);
3749                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3750        }
3751        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3752        return status;
3753}
3754
3755static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3756{
3757        __be32 *p;
3758        int status = 0;
3759
3760        *maxlink = 1;
3761        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3762                return -EIO;
3763        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3764                p = xdr_inline_decode(xdr, 4);
3765                if (unlikely(!p))
3766                        return -EIO;
3767                *maxlink = be32_to_cpup(p);
3768                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3769        }
3770        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3771        return status;
3772}
3773
3774static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3775{
3776        __be32 *p;
3777        int status = 0;
3778
3779        *maxname = 1024;
3780        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3781                return -EIO;
3782        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3783                p = xdr_inline_decode(xdr, 4);
3784                if (unlikely(!p))
3785                        return -EIO;
3786                *maxname = be32_to_cpup(p);
3787                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3788        }
3789        dprintk("%s: maxname=%u\n", __func__, *maxname);
3790        return status;
3791}
3792
3793static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794{
3795        __be32 *p;
3796        int status = 0;
3797
3798        *res = 1024;
3799        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800                return -EIO;
3801        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802                uint64_t maxread;
3803                p = xdr_inline_decode(xdr, 8);
3804                if (unlikely(!p))
3805                        return -EIO;
3806                xdr_decode_hyper(p, &maxread);
3807                if (maxread > 0x7FFFFFFF)
3808                        maxread = 0x7FFFFFFF;
3809                *res = (uint32_t)maxread;
3810                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811        }
3812        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813        return status;
3814}
3815
3816static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3817{
3818        __be32 *p;
3819        int status = 0;
3820
3821        *res = 1024;
3822        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3823                return -EIO;
3824        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3825                uint64_t maxwrite;
3826                p = xdr_inline_decode(xdr, 8);
3827                if (unlikely(!p))
3828                        return -EIO;
3829                xdr_decode_hyper(p, &maxwrite);
3830                if (maxwrite > 0x7FFFFFFF)
3831                        maxwrite = 0x7FFFFFFF;
3832                *res = (uint32_t)maxwrite;
3833                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3834        }
3835        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3836        return status;
3837}
3838
3839static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3840{
3841        uint32_t tmp;
3842        __be32 *p;
3843        int ret = 0;
3844
3845        *mode = 0;
3846        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3847                return -EIO;
3848        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3849                p = xdr_inline_decode(xdr, 4);
3850                if (unlikely(!p))
3851                        return -EIO;
3852                tmp = be32_to_cpup(p);
3853                *mode = tmp & ~S_IFMT;
3854                bitmap[1] &= ~FATTR4_WORD1_MODE;
3855                ret = NFS_ATTR_FATTR_MODE;
3856        }
3857        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3858        return ret;
3859}
3860
3861static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3862{
3863        __be32 *p;
3864        int ret = 0;
3865
3866        *nlink = 1;
3867        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3868                return -EIO;
3869        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3870                p = xdr_inline_decode(xdr, 4);
3871                if (unlikely(!p))
3872                        return -EIO;
3873                *nlink = be32_to_cpup(p);
3874                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3875                ret = NFS_ATTR_FATTR_NLINK;
3876        }
3877        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3878        return ret;
3879}
3880
3881static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3882                struct nfs4_string *name, gfp_t gfp_flags)
3883{
3884        ssize_t ret;
3885
3886        ret = xdr_stream_decode_string_dup(xdr, &name->data,
3887                        XDR_MAX_NETOBJ, gfp_flags);
3888        name->len = 0;
3889        if (ret > 0)
3890                name->len = ret;
3891        return ret;
3892}
3893
3894static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3895                const struct nfs_server *server, kuid_t *uid,
3896                struct nfs4_string *owner_name)
3897{
3898        ssize_t len;
3899        char *p;
3900
3901        *uid = make_kuid(&init_user_ns, -2);
3902        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903                return -EIO;
3904        if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3905                return 0;
3906        bitmap[1] &= ~FATTR4_WORD1_OWNER;
3907
3908        if (owner_name != NULL) {
3909                len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3910                if (len <= 0)
3911                        goto out;
3912                dprintk("%s: name=%s\n", __func__, owner_name->data);
3913                return NFS_ATTR_FATTR_OWNER_NAME;
3914        } else {
3915                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3916                                XDR_MAX_NETOBJ);
3917                if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3918                        goto out;
3919                dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3920                return NFS_ATTR_FATTR_OWNER;
3921        }
3922out:
3923        if (len == -EBADMSG)
3924                return -EIO;
3925        return 0;
3926}
3927
3928static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3929                const struct nfs_server *server, kgid_t *gid,
3930                struct nfs4_string *group_name)
3931{
3932        ssize_t len;
3933        char *p;
3934
3935        *gid = make_kgid(&init_user_ns, -2);
3936        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3937                return -EIO;
3938        if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3939                return 0;
3940        bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3941
3942        if (group_name != NULL) {
3943                len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3944                if (len <= 0)
3945                        goto out;
3946                dprintk("%s: name=%s\n", __func__, group_name->data);
3947                return NFS_ATTR_FATTR_GROUP_NAME;
3948        } else {
3949                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3950                                XDR_MAX_NETOBJ);
3951                if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3952                        goto out;
3953                dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3954                return NFS_ATTR_FATTR_GROUP;
3955        }
3956out:
3957        if (len == -EBADMSG)
3958                return -EIO;
3959        return 0;
3960}
3961
3962static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3963{
3964        uint32_t major = 0, minor = 0;
3965        __be32 *p;
3966        int ret = 0;
3967
3968        *rdev = MKDEV(0,0);
3969        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3970                return -EIO;
3971        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3972                dev_t tmp;
3973
3974                p = xdr_inline_decode(xdr, 8);
3975                if (unlikely(!p))
3976                        return -EIO;
3977                major = be32_to_cpup(p++);
3978                minor = be32_to_cpup(p);
3979                tmp = MKDEV(major, minor);
3980                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3981                        *rdev = tmp;
3982                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3983                ret = NFS_ATTR_FATTR_RDEV;
3984        }
3985        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3986        return ret;
3987}
3988
3989static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3990{
3991        __be32 *p;
3992        int status = 0;
3993
3994        *res = 0;
3995        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3996                return -EIO;
3997        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3998                p = xdr_inline_decode(xdr, 8);
3999                if (unlikely(!p))
4000                        return -EIO;

4001                xdr_decode_hyper(p, res);
4002                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4003        }
4004        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4005        return status;
4006}
4007
4008static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009{
4010        __be32 *p;
4011        int status = 0;
4012
4013        *res = 0;
4014        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4015                return -EIO;
4016        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4017                p = xdr_inline_decode(xdr, 8);
4018                if (unlikely(!p))
4019                        return -EIO;
4020                xdr_decode_hyper(p, res);
4021                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4022        }
4023        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4024        return status;
4025}
4026
4027static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4028{
4029        __be32 *p;
4030        int status = 0;
4031
4032        *res = 0;
4033        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4034                return -EIO;
4035        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4036                p = xdr_inline_decode(xdr, 8);
4037                if (unlikely(!p))
4038                        return -EIO;
4039                xdr_decode_hyper(p, res);
4040                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4041        }
4042        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4043        return status;
4044}
4045
4046static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4047{
4048        __be32 *p;
4049        int ret = 0;
4050
4051        *used = 0;
4052        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4053                return -EIO;
4054        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4055                p = xdr_inline_decode(xdr, 8);
4056                if (unlikely(!p))
4057                        return -EIO;
4058                xdr_decode_hyper(p, used);
4059                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4060                ret = NFS_ATTR_FATTR_SPACE_USED;
4061        }
4062        dprintk("%s: space used=%Lu\n", __func__,
4063                        (unsigned long long)*used);
4064        return ret;
4065}
4066
4067static __be32 *
4068xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4069{
4070        __u64 sec;
4071
4072        p = xdr_decode_hyper(p, &sec);
4073        t-> tv_sec = (time_t)sec;
4074        t->tv_nsec = be32_to_cpup(p++);
4075        return p;
4076}
4077
4078static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4079{
4080        __be32 *p;
4081
4082        p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4083        if (unlikely(!p))
4084                return -EIO;
4085        xdr_decode_nfstime4(p, time);
4086        return 0;
4087}
4088
4089static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4090{
4091        int status = 0;
4092
4093        time->tv_sec = 0;
4094        time->tv_nsec = 0;
4095        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4096                return -EIO;
4097        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4098                status = decode_attr_time(xdr, time);
4099                if (status == 0)
4100                        status = NFS_ATTR_FATTR_ATIME;
4101                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4102        }
4103        dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4104        return status;
4105}
4106
4107static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4108{
4109        int status = 0;
4110
4111        time->tv_sec = 0;
4112        time->tv_nsec = 0;
4113        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4114                return -EIO;
4115        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4116                status = decode_attr_time(xdr, time);
4117                if (status == 0)
4118                        status = NFS_ATTR_FATTR_CTIME;
4119                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4120        }
4121        dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4122        return status;
4123}
4124
4125static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4126                                  struct timespec *time)
4127{
4128        int status = 0;
4129
4130        time->tv_sec = 0;
4131        time->tv_nsec = 0;
4132        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4133                return -EIO;
4134        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4135                status = decode_attr_time(xdr, time);
4136                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4137        }
4138        dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4139                (long)time->tv_nsec);
4140        return status;
4141}
4142
4143static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4144                                        struct nfs4_label *label)
4145{
4146        uint32_t pi = 0;
4147        uint32_t lfs = 0;
4148        __u32 len;
4149        __be32 *p;
4150        int status = 0;
4151
4152        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4153                return -EIO;
4154        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4155                p = xdr_inline_decode(xdr, 4);
4156                if (unlikely(!p))
4157                        return -EIO;
4158                lfs = be32_to_cpup(p++);
4159                p = xdr_inline_decode(xdr, 4);
4160                if (unlikely(!p))
4161                        return -EIO;
4162                pi = be32_to_cpup(p++);
4163                p = xdr_inline_decode(xdr, 4);
4164                if (unlikely(!p))
4165                        return -EIO;
4166                len = be32_to_cpup(p++);
4167                p = xdr_inline_decode(xdr, len);
4168                if (unlikely(!p))
4169                        return -EIO;
4170                if (len < NFS4_MAXLABELLEN) {
4171                        if (label) {
4172                                memcpy(label->label, p, len);
4173                                label->len = len;
4174                                label->pi = pi;
4175                                label->lfs = lfs;
4176                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4177                        }
4178                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4179                } else
4180                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4181                                        __func__, len);
4182        }
4183        if (label && label->label)
4184                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4185                        (char *)label->label, label->len, label->pi, label->lfs);
4186        return status;
4187}
4188
4189static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4190{
4191        int status = 0;
4192
4193        time->tv_sec = 0;
4194        time->tv_nsec = 0;
4195        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4196                return -EIO;
4197        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4198                status = decode_attr_time(xdr, time);
4199                if (status == 0)
4200                        status = NFS_ATTR_FATTR_MTIME;
4201                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4202        }
4203        dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4204        return status;
4205}
4206
4207static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4208{
4209        unsigned int attrwords = XDR_QUADLEN(attrlen);
4210        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4211
4212        if (unlikely(attrwords != nwords)) {
4213                dprintk("%s: server returned incorrect attribute length: "
4214                        "%u %c %u\n",
4215                                __func__,
4216                                attrwords << 2,
4217                                (attrwords < nwords) ? '<' : '>',
4218                                nwords << 2);
4219                return -EIO;
4220        }
4221        return 0;
4222}
4223
4224static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4225{
4226        __be32 *p;
4227
4228        p = xdr_inline_decode(xdr, 20);
4229        if (unlikely(!p))
4230                return -EIO;
4231        cinfo->atomic = be32_to_cpup(p++);
4232        p = xdr_decode_hyper(p, &cinfo->before);
4233        xdr_decode_hyper(p, &cinfo->after);
4234        return 0;
4235}
4236
4237static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238{
4239        __be32 *p;
4240        uint32_t supp, acc;
4241        int status;
4242
4243        status = decode_op_hdr(xdr, OP_ACCESS);
4244        if (status)
4245                return status;
4246        p = xdr_inline_decode(xdr, 8);
4247        if (unlikely(!p))
4248                return -EIO;
4249        supp = be32_to_cpup(p++);
4250        acc = be32_to_cpup(p);
4251        *supported = supp;
4252        *access = acc;
4253        return 0;
4254}
4255
4256static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4257{
4258        ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4259        if (unlikely(ret < 0))
4260                return -EIO;
4261        return 0;
4262}
4263
4264static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4265{
4266        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4267}
4268
4269static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4270{
4271        stateid->type = NFS4_OPEN_STATEID_TYPE;
4272        return decode_stateid(xdr, stateid);
4273}
4274
4275static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4276{
4277        stateid->type = NFS4_LOCK_STATEID_TYPE;
4278        return decode_stateid(xdr, stateid);
4279}
4280
4281static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4282{
4283        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4284        return decode_stateid(xdr, stateid);
4285}
4286
4287static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288{
4289        nfs4_stateid dummy;
4290
4291        nfs4_stateid_copy(stateid, &invalid_stateid);
4292        return decode_stateid(xdr, &dummy);
4293}
4294
4295static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4296{
4297        int status;
4298
4299        status = decode_op_hdr(xdr, OP_CLOSE);
4300        if (status != -EIO)
4301                nfs_increment_open_seqid(status, res->seqid);
4302        if (!status)
4303                status = decode_invalid_stateid(xdr, &res->stateid);
4304        return status;
4305}
4306
4307static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4308{
4309        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4310}
4311
4312static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4313{
4314        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4315}
4316
4317static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4318{
4319        int status;
4320
4321        status = decode_op_hdr(xdr, OP_COMMIT);
4322        if (!status)
4323                status = decode_write_verifier(xdr, &res->verf->verifier);
4324        return status;
4325}
4326
4327static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4328{
4329        __be32 *p;
4330        uint32_t bmlen;
4331        int status;
4332
4333        status = decode_op_hdr(xdr, OP_CREATE);
4334        if (status)
4335                return status;
4336        if ((status = decode_change_info(xdr, cinfo)))
4337                return status;
4338        p = xdr_inline_decode(xdr, 4);
4339        if (unlikely(!p))
4340                return -EIO;
4341        bmlen = be32_to_cpup(p);
4342        p = xdr_inline_decode(xdr, bmlen << 2);
4343        if (likely(p))
4344                return 0;
4345        return -EIO;
4346}
4347
4348static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4349{
4350        unsigned int savep;
4351        uint32_t attrlen, bitmap[3] = {0};
4352        int status;
4353
4354        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4355                goto xdr_error;
4356        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4357                goto xdr_error;
4358        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4359                goto xdr_error;
4360        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4361                goto xdr_error;
4362        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4363                                                 &res->fh_expire_type)) != 0)
4364                goto xdr_error;
4365        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4366                goto xdr_error;
4367        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4368                goto xdr_error;
4369        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4370                goto xdr_error;
4371        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4372                                res->exclcreat_bitmask)) != 0)
4373                goto xdr_error;
4374        status = verify_attr_len(xdr, savep, attrlen);
4375xdr_error:
4376        dprintk("%s: xdr returned %d!\n", __func__, -status);
4377        return status;
4378}
4379
4380static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4381{
4382        unsigned int savep;
4383        uint32_t attrlen, bitmap[3] = {0};
4384        int status;
4385
4386        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4387                goto xdr_error;
4388        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4389                goto xdr_error;
4390        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4391                goto xdr_error;
4392
4393        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4394                goto xdr_error;
4395        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4396                goto xdr_error;
4397        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4398                goto xdr_error;
4399
4400        status = -EIO;
4401        if (unlikely(bitmap[0]))
4402                goto xdr_error;
4403
4404        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4405                goto xdr_error;
4406        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4407                goto xdr_error;
4408        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4409                goto xdr_error;
4410
4411        status = verify_attr_len(xdr, savep, attrlen);
4412xdr_error:
4413        dprintk("%s: xdr returned %d!\n", __func__, -status);
4414        return status;
4415}
4416
4417static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4418{
4419        unsigned int savep;
4420        uint32_t attrlen, bitmap[3] = {0};
4421        int status;
4422
4423        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424                goto xdr_error;
4425        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426                goto xdr_error;
4427        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428                goto xdr_error;
4429
4430        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4431                goto xdr_error;
4432        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4433                goto xdr_error;
4434
4435        status = verify_attr_len(xdr, savep, attrlen);
4436xdr_error:
4437        dprintk("%s: xdr returned %d!\n", __func__, -status);
4438        return status;
4439}
4440
4441static int decode_threshold_hint(struct xdr_stream *xdr,
4442                                  uint32_t *bitmap,
4443                                  uint64_t *res,
4444                                  uint32_t hint_bit)
4445{
4446        __be32 *p;
4447
4448        *res = 0;
4449        if (likely(bitmap[0] & hint_bit)) {
4450                p = xdr_inline_decode(xdr, 8);
4451                if (unlikely(!p))
4452                        return -EIO;
4453                xdr_decode_hyper(p, res);
4454        }
4455        return 0;
4456}
4457
4458static int decode_first_threshold_item4(struct xdr_stream *xdr,
4459                                        struct nfs4_threshold *res)
4460{
4461        __be32 *p;
4462        unsigned int savep;
4463        uint32_t bitmap[3] = {0,}, attrlen;
4464        int status;
4465
4466        /* layout type */
4467        p = xdr_inline_decode(xdr, 4);
4468        if (unlikely(!p))
4469                return -EIO;
4470        res->l_type = be32_to_cpup(p);
4471
4472        /* thi_hintset bitmap */
4473        status = decode_attr_bitmap(xdr, bitmap);
4474        if (status < 0)
4475                goto xdr_error;
4476
4477        /* thi_hintlist length */
4478        status = decode_attr_length(xdr, &attrlen, &savep);
4479        if (status < 0)
4480                goto xdr_error;
4481        /* thi_hintlist */
4482        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4483        if (status < 0)
4484                goto xdr_error;
4485        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4486        if (status < 0)
4487                goto xdr_error;
4488        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4489                                       THRESHOLD_RD_IO);
4490        if (status < 0)
4491                goto xdr_error;
4492        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4493                                       THRESHOLD_WR_IO);
4494        if (status < 0)
4495                goto xdr_error;
4496
4497        status = verify_attr_len(xdr, savep, attrlen);
4498        res->bm = bitmap[0];
4499
4500        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4501                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4502                res->wr_io_sz);
4503xdr_error:
4504        dprintk("%s ret=%d!\n", __func__, status);
4505        return status;
4506}
4507
4508/*
4509 * Thresholds on pNFS direct I/O vrs MDS I/O
4510 */
4511static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4512                                    uint32_t *bitmap,
4513                                    struct nfs4_threshold *res)
4514{
4515        __be32 *p;
4516        int status = 0;
4517        uint32_t num;
4518
4519        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4520                return -EIO;
4521        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4522                /* Did the server return an unrequested attribute? */
4523                if (unlikely(res == NULL))
4524                        return -EREMOTEIO;
4525                p = xdr_inline_decode(xdr, 4);
4526                if (unlikely(!p))
4527                        return -EIO;
4528                num = be32_to_cpup(p);
4529                if (num == 0)
4530                        return 0;
4531                if (num > 1)
4532                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4533                                "drivers per filesystem not supported\n",
4534                                __func__);
4535
4536                status = decode_first_threshold_item4(xdr, res);
4537                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4538        }
4539        return status;
4540}
4541
4542static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4543                struct nfs_fattr *fattr, struct nfs_fh *fh,
4544                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4545                const struct nfs_server *server)
4546{
4547        int status;
4548        umode_t fmode = 0;
4549        uint32_t type;
4550        int32_t err;
4551
4552        status = decode_attr_type(xdr, bitmap, &type);
4553        if (status < 0)
4554                goto xdr_error;
4555        fattr->mode = 0;
4556        if (status != 0) {
4557                fattr->mode |= nfs_type2fmt[type];
4558                fattr->valid |= status;
4559        }
4560
4561        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4562        if (status < 0)
4563                goto xdr_error;
4564        fattr->valid |= status;
4565
4566        status = decode_attr_size(xdr, bitmap, &fattr->size);
4567        if (status < 0)
4568                goto xdr_error;
4569        fattr->valid |= status;
4570
4571        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4572        if (status < 0)
4573                goto xdr_error;
4574        fattr->valid |= status;
4575
4576        err = 0;
4577        status = decode_attr_error(xdr, bitmap, &err);
4578        if (status < 0)
4579                goto xdr_error;
4580
4581        status = decode_attr_filehandle(xdr, bitmap, fh);
4582        if (status < 0)
4583                goto xdr_error;
4584
4585        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4586        if (status < 0)
4587                goto xdr_error;
4588        fattr->valid |= status;
4589
4590        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4591        if (status < 0)
4592                goto xdr_error;
4593        fattr->valid |= status;
4594
4595        status = -EIO;
4596        if (unlikely(bitmap[0]))
4597                goto xdr_error;
4598
4599        status = decode_attr_mode(xdr, bitmap, &fmode);
4600        if (status < 0)
4601                goto xdr_error;
4602        if (status != 0) {
4603                fattr->mode |= fmode;
4604                fattr->valid |= status;
4605        }
4606
4607        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4608        if (status < 0)
4609                goto xdr_error;
4610        fattr->valid |= status;
4611
4612        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4613        if (status < 0)
4614                goto xdr_error;
4615        fattr->valid |= status;
4616
4617        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4618        if (status < 0)
4619                goto xdr_error;
4620        fattr->valid |= status;
4621
4622        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4623        if (status < 0)
4624                goto xdr_error;
4625        fattr->valid |= status;
4626
4627        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4628        if (status < 0)
4629                goto xdr_error;
4630        fattr->valid |= status;
4631
4632        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4633        if (status < 0)
4634                goto xdr_error;
4635        fattr->valid |= status;
4636
4637        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4638        if (status < 0)
4639                goto xdr_error;
4640        fattr->valid |= status;
4641
4642        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4643        if (status < 0)
4644                goto xdr_error;
4645        fattr->valid |= status;
4646
4647        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4648        if (status < 0)
4649                goto xdr_error;
4650        fattr->valid |= status;
4651
4652        status = -EIO;
4653        if (unlikely(bitmap[1]))
4654                goto xdr_error;
4655
4656        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4657        if (status < 0)
4658                goto xdr_error;
4659
4660        if (label) {
4661                status = decode_attr_security_label(xdr, bitmap, label);
4662                if (status < 0)
4663                        goto xdr_error;
4664                fattr->valid |= status;
4665        }
4666
4667xdr_error:
4668        dprintk("%s: xdr returned %d\n", __func__, -status);
4669        return status;
4670}
4671
4672static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4673                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4674                struct nfs4_label *label, const struct nfs_server *server)
4675{
4676        unsigned int savep;
4677        uint32_t attrlen,
4678                 bitmap[3] = {0};
4679        int status;
4680
4681        status = decode_op_hdr(xdr, OP_GETATTR);
4682        if (status < 0)
4683                goto xdr_error;
4684
4685        status = decode_attr_bitmap(xdr, bitmap);
4686        if (status < 0)
4687                goto xdr_error;
4688
4689        status = decode_attr_length(xdr, &attrlen, &savep);
4690        if (status < 0)
4691                goto xdr_error;
4692
4693        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4694                                        label, server);
4695        if (status < 0)
4696                goto xdr_error;
4697
4698        status = verify_attr_len(xdr, savep, attrlen);
4699xdr_error:
4700        dprintk("%s: xdr returned %d\n", __func__, -status);
4701        return status;
4702}
4703
4704static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4705                struct nfs4_label *label, const struct nfs_server *server)
4706{
4707        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4708}
4709
4710static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4711                const struct nfs_server *server)
4712{
4713        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4714}
4715
4716/*
4717 * Decode potentially multiple layout types.
4718 */
4719static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4720                                    struct nfs_fsinfo *fsinfo)
4721{
4722        __be32 *p;
4723        uint32_t i;
4724
4725        p = xdr_inline_decode(xdr, 4);
4726        if (unlikely(!p))
4727                return -EIO;
4728        fsinfo->nlayouttypes = be32_to_cpup(p);
4729
4730        /* pNFS is not supported by the underlying file system */
4731        if (fsinfo->nlayouttypes == 0)
4732                return 0;
4733
4734        /* Decode and set first layout type, move xdr->p past unused types */
4735        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4736        if (unlikely(!p))
4737                return -EIO;
4738
4739        /* If we get too many, then just cap it at the max */
4740        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4741                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4742                        __func__, fsinfo->nlayouttypes);
4743                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4744        }
4745
4746        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4747                fsinfo->layouttype[i] = be32_to_cpup(p++);
4748        return 0;
4749}
4750
4751/*
4752 * The type of file system exported.
4753 * Note we must ensure that layouttype is set in any non-error case.
4754 */
4755static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4756                                struct nfs_fsinfo *fsinfo)
4757{
4758        int status = 0;
4759
4760        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4761        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4762                return -EIO;
4763        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4764                status = decode_pnfs_layout_types(xdr, fsinfo);
4765                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4766        }
4767        return status;
4768}
4769
4770/*
4771 * The prefered block size for layout directed io
4772 */
4773static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4774                                      uint32_t *res)
4775{
4776        __be32 *p;
4777
4778        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4779        *res = 0;
4780        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4781                p = xdr_inline_decode(xdr, 4);
4782                if (unlikely(!p))
4783                        return -EIO;
4784                *res = be32_to_cpup(p);
4785                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4786        }
4787        return 0;
4788}
4789
4790/*
4791 * The granularity of a CLONE operation.
4792 */
4793static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4794                                     uint32_t *res)
4795{
4796        __be32 *p;
4797
4798        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4799        *res = 0;
4800        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4801                p = xdr_inline_decode(xdr, 4);
4802                if (unlikely(!p))
4803                        return -EIO;
4804                *res = be32_to_cpup(p);
4805                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4806        }
4807        return 0;
4808}
4809
4810static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4811{
4812        unsigned int savep;
4813        uint32_t attrlen, bitmap[3];
4814        int status;
4815
4816        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4817                goto xdr_error;
4818        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4819                goto xdr_error;
4820        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4821                goto xdr_error;
4822
4823        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4824
4825        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4826                goto xdr_error;
4827        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4828                goto xdr_error;
4829        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4830                goto xdr_error;
4831        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4832        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4833                goto xdr_error;
4834        fsinfo->wtpref = fsinfo->wtmax;
4835
4836        status = -EIO;
4837        if (unlikely(bitmap[0]))
4838                goto xdr_error;
4839
4840        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4841        if (status != 0)
4842                goto xdr_error;
4843        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4844        if (status != 0)
4845                goto xdr_error;
4846
4847        status = -EIO;
4848        if (unlikely(bitmap[1]))
4849                goto xdr_error;
4850
4851        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4852        if (status)
4853                goto xdr_error;
4854        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4855        if (status)
4856                goto xdr_error;
4857
4858        status = verify_attr_len(xdr, savep, attrlen);
4859xdr_error:
4860        dprintk("%s: xdr returned %d!\n", __func__, -status);
4861        return status;
4862}
4863
4864static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4865{
4866        __be32 *p;
4867        uint32_t len;
4868        int status;
4869
4870        /* Zero handle first to allow comparisons */
4871        memset(fh, 0, sizeof(*fh));
4872
4873        status = decode_op_hdr(xdr, OP_GETFH);
4874        if (status)
4875                return status;
4876
4877        p = xdr_inline_decode(xdr, 4);
4878        if (unlikely(!p))
4879                return -EIO;
4880        len = be32_to_cpup(p);
4881        if (len > NFS4_FHSIZE)
4882                return -EIO;
4883        fh->size = len;
4884        p = xdr_inline_decode(xdr, len);
4885        if (unlikely(!p))
4886                return -EIO;
4887        memcpy(fh->data, p, len);
4888        return 0;
4889}
4890
4891static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4892{
4893        int status;
4894
4895        status = decode_op_hdr(xdr, OP_LINK);
4896        if (status)
4897                return status;
4898        return decode_change_info(xdr, cinfo);
4899}
4900
4901/*
4902 * We create the owner, so we know a proper owner.id length is 4.
4903 */
4904static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4905{
4906        uint64_t offset, length, clientid;
4907        __be32 *p;
4908        uint32_t namelen, type;
4909
4910        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4911        if (unlikely(!p))
4912                return -EIO;
4913        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4914        p = xdr_decode_hyper(p, &length);
4915        type = be32_to_cpup(p++); /* 4 byte read */
4916        if (fl != NULL) { /* manipulate file lock */
4917                fl->fl_start = (loff_t)offset;
4918                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4919                if (length == ~(uint64_t)0)
4920                        fl->fl_end = OFFSET_MAX;
4921                fl->fl_type = F_WRLCK;
4922                if (type & 1)
4923                        fl->fl_type = F_RDLCK;
4924                fl->fl_pid = 0;
4925        }
4926        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4927        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4928        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4929        if (likely(!p))
4930                return -EIO;
4931        return -NFS4ERR_DENIED;
4932}
4933
4934static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4935{
4936        int status;
4937
4938        status = decode_op_hdr(xdr, OP_LOCK);
4939        if (status == -EIO)
4940                goto out;
4941        if (status == 0) {
4942                status = decode_lock_stateid(xdr, &res->stateid);
4943                if (unlikely(status))
4944                        goto out;
4945        } else if (status == -NFS4ERR_DENIED)
4946                status = decode_lock_denied(xdr, NULL);
4947        if (res->open_seqid != NULL)
4948                nfs_increment_open_seqid(status, res->open_seqid);
4949        nfs_increment_lock_seqid(status, res->lock_seqid);
4950out:
4951        return status;
4952}
4953
4954static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4955{
4956        int status;
4957        status = decode_op_hdr(xdr, OP_LOCKT);
4958        if (status == -NFS4ERR_DENIED)
4959                return decode_lock_denied(xdr, res->denied);
4960        return status;
4961}
4962
4963static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4964{
4965        int status;
4966
4967        status = decode_op_hdr(xdr, OP_LOCKU);
4968        if (status != -EIO)
4969                nfs_increment_lock_seqid(status, res->seqid);
4970        if (status == 0)
4971                status = decode_lock_stateid(xdr, &res->stateid);
4972        return status;
4973}
4974
4975static int decode_release_lockowner(struct xdr_stream *xdr)
4976{
4977        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4978}
4979
4980static int decode_lookup(struct xdr_stream *xdr)
4981{
4982        return decode_op_hdr(xdr, OP_LOOKUP);
4983}
4984
4985static int decode_lookupp(struct xdr_stream *xdr)
4986{
4987        return decode_op_hdr(xdr, OP_LOOKUPP);
4988}
4989
4990/* This is too sick! */
4991static int decode_space_limit(struct xdr_stream *xdr,
4992                unsigned long *pagemod_limit)
4993{
4994        __be32 *p;
4995        uint32_t limit_type, nblocks, blocksize;
4996        u64 maxsize = 0;
4997
4998        p = xdr_inline_decode(xdr, 12);
4999        if (unlikely(!p))
5000                return -EIO;

5001        limit_type = be32_to_cpup(p++);
5002        switch (limit_type) {
5003        case NFS4_LIMIT_SIZE:
5004                xdr_decode_hyper(p, &maxsize);
5005                break;
5006        case NFS4_LIMIT_BLOCKS:
5007                nblocks = be32_to_cpup(p++);
5008                blocksize = be32_to_cpup(p);
5009                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5010        }
5011        maxsize >>= PAGE_SHIFT;
5012        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5013        return 0;
5014}
5015
5016static int decode_rw_delegation(struct xdr_stream *xdr,
5017                uint32_t delegation_type,
5018                struct nfs_openres *res)
5019{
5020        __be32 *p;
5021        int status;
5022
5023        status = decode_delegation_stateid(xdr, &res->delegation);
5024        if (unlikely(status))
5025                return status;
5026        p = xdr_inline_decode(xdr, 4);
5027        if (unlikely(!p))
5028                return -EIO;
5029        res->do_recall = be32_to_cpup(p);
5030
5031        switch (delegation_type) {
5032        case NFS4_OPEN_DELEGATE_READ:
5033                res->delegation_type = FMODE_READ;
5034                break;
5035        case NFS4_OPEN_DELEGATE_WRITE:
5036                res->delegation_type = FMODE_WRITE|FMODE_READ;
5037                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5038                                return -EIO;
5039        }
5040        return decode_ace(xdr, NULL);
5041}
5042
5043static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5044{
5045        __be32 *p;
5046        uint32_t why_no_delegation;
5047
5048        p = xdr_inline_decode(xdr, 4);
5049        if (unlikely(!p))
5050                return -EIO;
5051        why_no_delegation = be32_to_cpup(p);
5052        switch (why_no_delegation) {
5053                case WND4_CONTENTION:
5054                case WND4_RESOURCE:
5055                        xdr_inline_decode(xdr, 4);
5056                        /* Ignore for now */
5057        }
5058        return 0;
5059}
5060
5061static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5062{
5063        __be32 *p;
5064        uint32_t delegation_type;
5065
5066        p = xdr_inline_decode(xdr, 4);
5067        if (unlikely(!p))
5068                return -EIO;
5069        delegation_type = be32_to_cpup(p);
5070        res->delegation_type = 0;
5071        switch (delegation_type) {
5072        case NFS4_OPEN_DELEGATE_NONE:
5073                return 0;
5074        case NFS4_OPEN_DELEGATE_READ:
5075        case NFS4_OPEN_DELEGATE_WRITE:
5076                return decode_rw_delegation(xdr, delegation_type, res);
5077        case NFS4_OPEN_DELEGATE_NONE_EXT:
5078                return decode_no_delegation(xdr, res);
5079        }
5080        return -EIO;
5081}
5082
5083static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5084{
5085        __be32 *p;
5086        uint32_t savewords, bmlen, i;
5087        int status;
5088
5089        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5090                return status;
5091        nfs_increment_open_seqid(status, res->seqid);
5092        if (status)
5093                return status;
5094        status = decode_open_stateid(xdr, &res->stateid);
5095        if (unlikely(status))
5096                return status;
5097
5098        decode_change_info(xdr, &res->cinfo);
5099
5100        p = xdr_inline_decode(xdr, 8);
5101        if (unlikely(!p))
5102                return -EIO;
5103        res->rflags = be32_to_cpup(p++);
5104        bmlen = be32_to_cpup(p);
5105        if (bmlen > 10)
5106                goto xdr_error;
5107
5108        p = xdr_inline_decode(xdr, bmlen << 2);
5109        if (unlikely(!p))
5110                return -EIO;
5111        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5112        for (i = 0; i < savewords; ++i)
5113                res->attrset[i] = be32_to_cpup(p++);
5114        for (; i < NFS4_BITMAP_SIZE; i++)
5115                res->attrset[i] = 0;
5116
5117        return decode_delegation(xdr, res);
5118xdr_error:
5119        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5120        return -EIO;
5121}
5122
5123static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5124{
5125        int status;
5126
5127        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5128        if (status != -EIO)
5129                nfs_increment_open_seqid(status, res->seqid);
5130        if (!status)
5131                status = decode_open_stateid(xdr, &res->stateid);
5132        return status;
5133}
5134
5135static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5136{
5137        int status;
5138
5139        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5140        if (status != -EIO)
5141                nfs_increment_open_seqid(status, res->seqid);
5142        if (!status)
5143                status = decode_open_stateid(xdr, &res->stateid);
5144        return status;
5145}
5146
5147static int decode_putfh(struct xdr_stream *xdr)
5148{
5149        return decode_op_hdr(xdr, OP_PUTFH);
5150}
5151
5152static int decode_putrootfh(struct xdr_stream *xdr)
5153{
5154        return decode_op_hdr(xdr, OP_PUTROOTFH);
5155}
5156
5157static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5158                       struct nfs_pgio_res *res)
5159{
5160        __be32 *p;
5161        uint32_t count, eof, recvd;
5162        int status;
5163
5164        status = decode_op_hdr(xdr, OP_READ);
5165        if (status)
5166                return status;
5167        p = xdr_inline_decode(xdr, 8);
5168        if (unlikely(!p))
5169                return -EIO;
5170        eof = be32_to_cpup(p++);
5171        count = be32_to_cpup(p);
5172        recvd = xdr_read_pages(xdr, count);
5173        if (count > recvd) {
5174                dprintk("NFS: server cheating in read reply: "
5175                                "count %u > recvd %u\n", count, recvd);
5176                count = recvd;
5177                eof = 0;
5178        }
5179        res->eof = eof;
5180        res->count = count;
5181        return 0;
5182}
5183
5184static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5185{
5186        int             status;
5187        __be32          verf[2];
5188
5189        status = decode_op_hdr(xdr, OP_READDIR);
5190        if (!status)
5191                status = decode_verifier(xdr, readdir->verifier.data);
5192        if (unlikely(status))
5193                return status;
5194        memcpy(verf, readdir->verifier.data, sizeof(verf));
5195        dprintk("%s: verifier = %08x:%08x\n",
5196                        __func__, verf[0], verf[1]);
5197        return xdr_read_pages(xdr, xdr->buf->page_len);
5198}
5199
5200static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5201{
5202        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5203        u32 len, recvd;
5204        __be32 *p;
5205        int status;
5206
5207        status = decode_op_hdr(xdr, OP_READLINK);
5208        if (status)
5209                return status;
5210
5211        /* Convert length of symlink */
5212        p = xdr_inline_decode(xdr, 4);
5213        if (unlikely(!p))
5214                return -EIO;
5215        len = be32_to_cpup(p);
5216        if (len >= rcvbuf->page_len || len <= 0) {
5217                dprintk("nfs: server returned giant symlink!\n");
5218                return -ENAMETOOLONG;
5219        }
5220        recvd = xdr_read_pages(xdr, len);
5221        if (recvd < len) {
5222                dprintk("NFS: server cheating in readlink reply: "
5223                                "count %u > recvd %u\n", len, recvd);
5224                return -EIO;
5225        }
5226        /*
5227         * The XDR encode routine has set things up so that
5228         * the link text will be copied directly into the
5229         * buffer.  We just have to do overflow-checking,
5230         * and and null-terminate the text (the VFS expects
5231         * null-termination).
5232         */
5233        xdr_terminate_string(rcvbuf, len);
5234        return 0;
5235}
5236
5237static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5238{
5239        int status;
5240
5241        status = decode_op_hdr(xdr, OP_REMOVE);
5242        if (status)
5243                goto out;
5244        status = decode_change_info(xdr, cinfo);
5245out:
5246        return status;
5247}
5248
5249static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5250              struct nfs4_change_info *new_cinfo)
5251{
5252        int status;
5253
5254        status = decode_op_hdr(xdr, OP_RENAME);
5255        if (status)
5256                goto out;
5257        if ((status = decode_change_info(xdr, old_cinfo)))
5258                goto out;
5259        status = decode_change_info(xdr, new_cinfo);
5260out:
5261        return status;
5262}
5263
5264static int decode_renew(struct xdr_stream *xdr)
5265{
5266        return decode_op_hdr(xdr, OP_RENEW);
5267}
5268
5269static int
5270decode_restorefh(struct xdr_stream *xdr)
5271{
5272        return decode_op_hdr(xdr, OP_RESTOREFH);
5273}
5274
5275static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5276                         struct nfs_getaclres *res)
5277{
5278        unsigned int savep;
5279        uint32_t attrlen,
5280                 bitmap[3] = {0};
5281        int status;
5282        unsigned int pg_offset;
5283
5284        res->acl_len = 0;
5285        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5286                goto out;
5287
5288        xdr_enter_page(xdr, xdr->buf->page_len);
5289
5290        /* Calculate the offset of the page data */
5291        pg_offset = xdr->buf->head[0].iov_len;
5292
5293        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5294                goto out;
5295        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5296                goto out;
5297
5298        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5299                return -EIO;
5300        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5301
5302                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5303                 * are stored with the acl data to handle the problem of
5304                 * variable length bitmaps.*/
5305                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5306                res->acl_len = attrlen;
5307
5308                /* Check for receive buffer overflow */
5309                if (res->acl_len > (xdr->nwords << 2) ||
5310                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5311                        res->acl_flags |= NFS4_ACL_TRUNC;
5312                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5313                                        attrlen, xdr->nwords << 2);
5314                }
5315        } else
5316                status = -EOPNOTSUPP;
5317
5318out:
5319        return status;
5320}
5321
5322static int
5323decode_savefh(struct xdr_stream *xdr)
5324{
5325        return decode_op_hdr(xdr, OP_SAVEFH);
5326}
5327
5328static int decode_setattr(struct xdr_stream *xdr)
5329{
5330        int status;
5331
5332        status = decode_op_hdr(xdr, OP_SETATTR);
5333        if (status)
5334                return status;
5335        if (decode_bitmap4(xdr, NULL, 0) >= 0)
5336                return 0;
5337        return -EIO;
5338}
5339
5340static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5341{
5342        __be32 *p;
5343        uint32_t opnum;
5344        int32_t nfserr;
5345
5346        p = xdr_inline_decode(xdr, 8);
5347        if (unlikely(!p))
5348                return -EIO;
5349        opnum = be32_to_cpup(p++);
5350        if (opnum != OP_SETCLIENTID) {
5351                dprintk("nfs: decode_setclientid: Server returned operation"
5352                        " %d\n", opnum);
5353                return -EIO;
5354        }
5355        nfserr = be32_to_cpup(p);
5356        if (nfserr == NFS_OK) {
5357                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5358                if (unlikely(!p))
5359                        return -EIO;
5360                p = xdr_decode_hyper(p, &res->clientid);
5361                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5362        } else if (nfserr == NFSERR_CLID_INUSE) {
5363                uint32_t len;
5364
5365                /* skip netid string */
5366                p = xdr_inline_decode(xdr, 4);
5367                if (unlikely(!p))
5368                        return -EIO;
5369                len = be32_to_cpup(p);
5370                p = xdr_inline_decode(xdr, len);
5371                if (unlikely(!p))
5372                        return -EIO;
5373
5374                /* skip uaddr string */
5375                p = xdr_inline_decode(xdr, 4);
5376                if (unlikely(!p))
5377                        return -EIO;
5378                len = be32_to_cpup(p);
5379                p = xdr_inline_decode(xdr, len);
5380                if (unlikely(!p))
5381                        return -EIO;
5382                return -NFSERR_CLID_INUSE;
5383        } else
5384                return nfs4_stat_to_errno(nfserr);
5385
5386        return 0;
5387}
5388
5389static int decode_setclientid_confirm(struct xdr_stream *xdr)
5390{
5391        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5392}
5393
5394static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5395{
5396        __be32 *p;
5397        int status;
5398
5399        status = decode_op_hdr(xdr, OP_WRITE);
5400        if (status)
5401                return status;
5402
5403        p = xdr_inline_decode(xdr, 8);
5404        if (unlikely(!p))
5405                return -EIO;
5406        res->count = be32_to_cpup(p++);
5407        res->verf->committed = be32_to_cpup(p++);
5408        return decode_write_verifier(xdr, &res->verf->verifier);
5409}
5410
5411static int decode_delegreturn(struct xdr_stream *xdr)
5412{
5413        return decode_op_hdr(xdr, OP_DELEGRETURN);
5414}
5415
5416static int decode_secinfo_gss(struct xdr_stream *xdr,
5417                              struct nfs4_secinfo4 *flavor)
5418{
5419        u32 oid_len;
5420        __be32 *p;
5421
5422        p = xdr_inline_decode(xdr, 4);
5423        if (unlikely(!p))
5424                return -EIO;
5425        oid_len = be32_to_cpup(p);
5426        if (oid_len > GSS_OID_MAX_LEN)
5427                return -EINVAL;
5428
5429        p = xdr_inline_decode(xdr, oid_len);
5430        if (unlikely(!p))
5431                return -EIO;
5432        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5433        flavor->flavor_info.oid.len = oid_len;
5434
5435        p = xdr_inline_decode(xdr, 8);
5436        if (unlikely(!p))
5437                return -EIO;
5438        flavor->flavor_info.qop = be32_to_cpup(p++);
5439        flavor->flavor_info.service = be32_to_cpup(p);
5440
5441        return 0;
5442}
5443
5444static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445{
5446        struct nfs4_secinfo4 *sec_flavor;
5447        unsigned int i, num_flavors;
5448        int status;
5449        __be32 *p;
5450
5451        p = xdr_inline_decode(xdr, 4);
5452        if (unlikely(!p))
5453                return -EIO;
5454
5455        res->flavors->num_flavors = 0;
5456        num_flavors = be32_to_cpup(p);
5457
5458        for (i = 0; i < num_flavors; i++) {
5459                sec_flavor = &res->flavors->flavors[i];
5460                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5461                        break;
5462
5463                p = xdr_inline_decode(xdr, 4);
5464                if (unlikely(!p))
5465                        return -EIO;
5466                sec_flavor->flavor = be32_to_cpup(p);
5467
5468                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5469                        status = decode_secinfo_gss(xdr, sec_flavor);
5470                        if (status)
5471                                goto out;
5472                }
5473                res->flavors->num_flavors++;
5474        }
5475
5476        status = 0;
5477out:
5478        return status;
5479}
5480
5481static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5482{
5483        int status = decode_op_hdr(xdr, OP_SECINFO);
5484        if (status)
5485                return status;
5486        return decode_secinfo_common(xdr, res);
5487}
5488
5489#if defined(CONFIG_NFS_V4_1)
5490static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5491{
5492        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5493        if (status)
5494                return status;
5495        return decode_secinfo_common(xdr, res);
5496}
5497
5498static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5499{
5500        __be32 *p;
5501        uint32_t bitmap_words;
5502        unsigned int i;
5503
5504        p = xdr_inline_decode(xdr, 4);
5505        if (!p)
5506                return -EIO;
5507        bitmap_words = be32_to_cpup(p++);
5508        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5509                return -EIO;
5510        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5511        for (i = 0; i < bitmap_words; i++)
5512                op_map->u.words[i] = be32_to_cpup(p++);
5513
5514        return 0;
5515}
5516
5517static int decode_exchange_id(struct xdr_stream *xdr,
5518                              struct nfs41_exchange_id_res *res)
5519{
5520        __be32 *p;
5521        uint32_t dummy;
5522        char *dummy_str;
5523        int status;
5524        uint32_t impl_id_count;
5525
5526        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5527        if (status)
5528                return status;
5529
5530        p = xdr_inline_decode(xdr, 8);
5531        if (unlikely(!p))
5532                return -EIO;
5533        xdr_decode_hyper(p, &res->clientid);
5534        p = xdr_inline_decode(xdr, 12);
5535        if (unlikely(!p))
5536                return -EIO;
5537        res->seqid = be32_to_cpup(p++);
5538        res->flags = be32_to_cpup(p++);
5539
5540        res->state_protect.how = be32_to_cpup(p);
5541        switch (res->state_protect.how) {
5542        case SP4_NONE:
5543                break;
5544        case SP4_MACH_CRED:
5545                status = decode_op_map(xdr, &res->state_protect.enforce);
5546                if (status)
5547                        return status;
5548                status = decode_op_map(xdr, &res->state_protect.allow);
5549                if (status)
5550                        return status;
5551                break;
5552        default:
5553                WARN_ON_ONCE(1);
5554                return -EIO;
5555        }
5556
5557        /* server_owner4.so_minor_id */
5558        p = xdr_inline_decode(xdr, 8);
5559        if (unlikely(!p))
5560                return -EIO;
5561        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5562
5563        /* server_owner4.so_major_id */
5564        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5565        if (unlikely(status))
5566                return status;
5567        memcpy(res->server_owner->major_id, dummy_str, dummy);
5568        res->server_owner->major_id_sz = dummy;
5569
5570        /* server_scope4 */
5571        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5572        if (unlikely(status))
5573                return status;
5574        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5575        res->server_scope->server_scope_sz = dummy;
5576
5577        /* Implementation Id */
5578        p = xdr_inline_decode(xdr, 4);
5579        if (unlikely(!p))
5580                return -EIO;
5581        impl_id_count = be32_to_cpup(p++);
5582
5583        if (impl_id_count) {
5584                /* nii_domain */
5585                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5586                if (unlikely(status))
5587                        return status;
5588                memcpy(res->impl_id->domain, dummy_str, dummy);
5589
5590                /* nii_name */
5591                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5592                if (unlikely(status))
5593                        return status;
5594                memcpy(res->impl_id->name, dummy_str, dummy);
5595
5596                /* nii_date */
5597                p = xdr_inline_decode(xdr, 12);
5598                if (unlikely(!p))
5599                        return -EIO;
5600                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5601                res->impl_id->date.nseconds = be32_to_cpup(p);
5602
5603                /* if there's more than one entry, ignore the rest */
5604        }
5605        return 0;
5606}
5607
5608static int decode_chan_attrs(struct xdr_stream *xdr,
5609                             struct nfs4_channel_attrs *attrs)
5610{
5611        __be32 *p;
5612        u32 nr_attrs, val;
5613
5614        p = xdr_inline_decode(xdr, 28);
5615        if (unlikely(!p))
5616                return -EIO;
5617        val = be32_to_cpup(p++);        /* headerpadsz */
5618        if (val)
5619                return -EINVAL;         /* no support for header padding yet */
5620        attrs->max_rqst_sz = be32_to_cpup(p++);
5621        attrs->max_resp_sz = be32_to_cpup(p++);
5622        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5623        attrs->max_ops = be32_to_cpup(p++);
5624        attrs->max_reqs = be32_to_cpup(p++);
5625        nr_attrs = be32_to_cpup(p);
5626        if (unlikely(nr_attrs > 1)) {
5627                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5628                        "count %u\n", __func__, nr_attrs);
5629                return -EINVAL;
5630        }
5631        if (nr_attrs == 1) {
5632                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5633                if (unlikely(!p))
5634                        return -EIO;
5635        }
5636        return 0;
5637}
5638
5639static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5640{
5641        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5642}
5643
5644static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5645                                struct nfs41_bind_conn_to_session_res *res)
5646{
5647        __be32 *p;
5648        int status;
5649
5650        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5651        if (!status)
5652                status = decode_sessionid(xdr, &res->sessionid);
5653        if (unlikely(status))
5654                return status;
5655
5656        /* dir flags, rdma mode bool */
5657        p = xdr_inline_decode(xdr, 8);
5658        if (unlikely(!p))
5659                return -EIO;
5660
5661        res->dir = be32_to_cpup(p++);
5662        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5663                return -EIO;
5664        if (be32_to_cpup(p) == 0)
5665                res->use_conn_in_rdma_mode = false;
5666        else
5667                res->use_conn_in_rdma_mode = true;
5668
5669        return 0;
5670}
5671
5672static int decode_create_session(struct xdr_stream *xdr,
5673                                 struct nfs41_create_session_res *res)
5674{
5675        __be32 *p;
5676        int status;
5677
5678        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5679        if (!status)
5680                status = decode_sessionid(xdr, &res->sessionid);
5681        if (unlikely(status))
5682                return status;
5683
5684        /* seqid, flags */
5685        p = xdr_inline_decode(xdr, 8);
5686        if (unlikely(!p))
5687                return -EIO;
5688        res->seqid = be32_to_cpup(p++);
5689        res->flags = be32_to_cpup(p);
5690
5691        /* Channel attributes */
5692        status = decode_chan_attrs(xdr, &res->fc_attrs);
5693        if (!status)
5694                status = decode_chan_attrs(xdr, &res->bc_attrs);
5695        return status;
5696}
5697
5698static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5699{
5700        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5701}
5702
5703static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5704{
5705        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5706}
5707
5708static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5709{
5710        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5711}
5712#endif /* CONFIG_NFS_V4_1 */
5713
5714static int decode_sequence(struct xdr_stream *xdr,
5715                           struct nfs4_sequence_res *res,
5716                           struct rpc_rqst *rqstp)
5717{
5718#if defined(CONFIG_NFS_V4_1)
5719        struct nfs4_session *session;
5720        struct nfs4_sessionid id;
5721        u32 dummy;
5722        int status;
5723        __be32 *p;
5724
5725        if (res->sr_slot == NULL)
5726                return 0;
5727        if (!res->sr_slot->table->session)
5728                return 0;
5729
5730        status = decode_op_hdr(xdr, OP_SEQUENCE);
5731        if (!status)
5732                status = decode_sessionid(xdr, &id);
5733        if (unlikely(status))
5734                goto out_err;
5735
5736        /*
5737         * If the server returns different values for sessionID, slotID or
5738         * sequence number, the server is looney tunes.
5739         */
5740        status = -EREMOTEIO;
5741        session = res->sr_slot->table->session;
5742
5743        if (memcmp(id.data, session->sess_id.data,
5744                   NFS4_MAX_SESSIONID_LEN)) {
5745                dprintk("%s Invalid session id\n", __func__);
5746                goto out_err;
5747        }
5748
5749        p = xdr_inline_decode(xdr, 20);
5750        if (unlikely(!p))
5751                goto out_overflow;
5752
5753        /* seqid */
5754        dummy = be32_to_cpup(p++);
5755        if (dummy != res->sr_slot->seq_nr) {
5756                dprintk("%s Invalid sequence number\n", __func__);
5757                goto out_err;
5758        }
5759        /* slot id */
5760        dummy = be32_to_cpup(p++);
5761        if (dummy != res->sr_slot->slot_nr) {
5762                dprintk("%s Invalid slot id\n", __func__);
5763                goto out_err;
5764        }
5765        /* highest slot id */
5766        res->sr_highest_slotid = be32_to_cpup(p++);
5767        /* target highest slot id */
5768        res->sr_target_highest_slotid = be32_to_cpup(p++);
5769        /* result flags */
5770        res->sr_status_flags = be32_to_cpup(p);
5771        status = 0;
5772out_err:
5773        res->sr_status = status;
5774        return status;
5775out_overflow:
5776        status = -EIO;
5777        goto out_err;
5778#else  /* CONFIG_NFS_V4_1 */
5779        return 0;
5780#endif /* CONFIG_NFS_V4_1 */
5781}
5782
5783#if defined(CONFIG_NFS_V4_1)
5784static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5785{
5786        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5787        return decode_stateid(xdr, stateid);
5788}
5789
5790static int decode_getdeviceinfo(struct xdr_stream *xdr,
5791                                struct nfs4_getdeviceinfo_res *res)
5792{
5793        struct pnfs_device *pdev = res->pdev;
5794        __be32 *p;
5795        uint32_t len, type;
5796        int status;
5797
5798        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5799        if (status) {
5800                if (status == -ETOOSMALL) {
5801                        p = xdr_inline_decode(xdr, 4);
5802                        if (unlikely(!p))
5803                                return -EIO;
5804                        pdev->mincount = be32_to_cpup(p);
5805                        dprintk("%s: Min count too small. mincnt = %u\n",
5806                                __func__, pdev->mincount);
5807                }
5808                return status;
5809        }
5810
5811        p = xdr_inline_decode(xdr, 8);
5812        if (unlikely(!p))
5813                return -EIO;
5814        type = be32_to_cpup(p++);
5815        if (type != pdev->layout_type) {
5816                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5817                        __func__, pdev->layout_type, type);
5818                return -EINVAL;
5819        }
5820        /*
5821         * Get the length of the opaque device_addr4. xdr_read_pages places
5822         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5823         * and places the remaining xdr data in xdr_buf->tail
5824         */
5825        pdev->mincount = be32_to_cpup(p);
5826        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5827                return -EIO;
5828
5829        /* Parse notification bitmap, verifying that it is zero. */
5830        p = xdr_inline_decode(xdr, 4);
5831        if (unlikely(!p))
5832                return -EIO;
5833        len = be32_to_cpup(p);
5834        if (len) {
5835                uint32_t i;
5836
5837                p = xdr_inline_decode(xdr, 4 * len);
5838                if (unlikely(!p))
5839                        return -EIO;
5840
5841                res->notification = be32_to_cpup(p++);
5842                for (i = 1; i < len; i++) {
5843                        if (be32_to_cpup(p++)) {
5844                                dprintk("%s: unsupported notification\n",
5845                                        __func__);
5846                                return -EIO;
5847                        }
5848                }
5849        }
5850        return 0;
5851}
5852
5853static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5854                            struct nfs4_layoutget_res *res)
5855{
5856        __be32 *p;
5857        int status;
5858        u32 layout_count;
5859        u32 recvd;
5860
5861        status = decode_op_hdr(xdr, OP_LAYOUTGET);
5862        if (status)
5863                goto out;
5864        p = xdr_inline_decode(xdr, 4);
5865        if (unlikely(!p))
5866                goto out_overflow;
5867        res->return_on_close = be32_to_cpup(p);
5868        decode_layout_stateid(xdr, &res->stateid);
5869        p = xdr_inline_decode(xdr, 4);
5870        if (unlikely(!p))
5871                goto out_overflow;
5872        layout_count = be32_to_cpup(p);
5873        if (!layout_count) {
5874                dprintk("%s: server responded with empty layout array\n",
5875                        __func__);
5876                status = -EINVAL;
5877                goto out;
5878        }
5879
5880        p = xdr_inline_decode(xdr, 28);
5881        if (unlikely(!p))
5882                goto out_overflow;
5883        p = xdr_decode_hyper(p, &res->range.offset);
5884        p = xdr_decode_hyper(p, &res->range.length);
5885        res->range.iomode = be32_to_cpup(p++);
5886        res->type = be32_to_cpup(p++);
5887        res->layoutp->len = be32_to_cpup(p);
5888
5889        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5890                __func__,
5891                (unsigned long)res->range.offset,
5892                (unsigned long)res->range.length,
5893                res->range.iomode,
5894                res->type,
5895                res->layoutp->len);
5896
5897        recvd = xdr_read_pages(xdr, res->layoutp->len);
5898        if (res->layoutp->len > recvd) {
5899                dprintk("NFS: server cheating in layoutget reply: "
5900                                "layout len %u > recvd %u\n",
5901                                res->layoutp->len, recvd);
5902                status = -EINVAL;
5903                goto out;
5904        }
5905
5906        if (layout_count > 1) {
5907                /* We only handle a length one array at the moment.  Any
5908                 * further entries are just ignored.  Note that this means
5909                 * the client may see a response that is less than the
5910                 * minimum it requested.
5911                 */
5912                dprintk("%s: server responded with %d layouts, dropping tail\n",
5913                        __func__, layout_count);
5914        }
5915
5916out:
5917        res->status = status;
5918        return status;
5919out_overflow:
5920        status = -EIO;
5921        goto out;
5922}
5923
5924static int decode_layoutreturn(struct xdr_stream *xdr,
5925                               struct nfs4_layoutreturn_res *res)
5926{
5927        __be32 *p;
5928        int status;
5929
5930        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5931        if (status)
5932                return status;
5933        p = xdr_inline_decode(xdr, 4);
5934        if (unlikely(!p))
5935                return -EIO;
5936        res->lrs_present = be32_to_cpup(p);
5937        if (res->lrs_present)
5938                status = decode_layout_stateid(xdr, &res->stateid);
5939        else
5940                nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5941        return status;
5942}
5943
5944static int decode_layoutcommit(struct xdr_stream *xdr,
5945                               struct rpc_rqst *req,
5946                               struct nfs4_layoutcommit_res *res)
5947{
5948        __be32 *p;
5949        __u32 sizechanged;
5950        int status;
5951
5952        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5953        res->status = status;
5954        if (status)
5955                return status;
5956
5957        p = xdr_inline_decode(xdr, 4);
5958        if (unlikely(!p))
5959                return -EIO;
5960        sizechanged = be32_to_cpup(p);
5961
5962        if (sizechanged) {
5963                /* throw away new size */
5964                p = xdr_inline_decode(xdr, 8);
5965                if (unlikely(!p))
5966                        return -EIO;
5967        }
5968        return 0;
5969}
5970
5971static int decode_test_stateid(struct xdr_stream *xdr,
5972                               struct nfs41_test_stateid_res *res)
5973{
5974        __be32 *p;
5975        int status;
5976        int num_res;
5977
5978        status = decode_op_hdr(xdr, OP_TEST_STATEID);
5979        if (status)
5980                return status;
5981
5982        p = xdr_inline_decode(xdr, 4);
5983        if (unlikely(!p))
5984                return -EIO;
5985        num_res = be32_to_cpup(p++);
5986        if (num_res != 1)
5987                return -EIO;
5988
5989        p = xdr_inline_decode(xdr, 4);
5990        if (unlikely(!p))
5991                return -EIO;
5992        res->status = be32_to_cpup(p++);
5993
5994        return status;
5995}
5996
5997static int decode_free_stateid(struct xdr_stream *xdr,
5998                               struct nfs41_free_stateid_res *res)
5999{
6000        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);

6001        return res->status;
6002}
6003#else
6004static inline
6005int decode_layoutreturn(struct xdr_stream *xdr,
6006                               struct nfs4_layoutreturn_res *res)
6007{
6008        return 0;
6009}
6010
6011static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6012                            struct nfs4_layoutget_res *res)
6013{
6014        return 0;
6015}
6016
6017#endif /* CONFIG_NFS_V4_1 */
6018
6019/*
6020 * END OF "GENERIC" DECODE ROUTINES.
6021 */
6022
6023/*
6024 * Decode OPEN_DOWNGRADE response
6025 */
6026static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6027                                       struct xdr_stream *xdr,
6028                                       void *data)
6029{
6030        struct nfs_closeres *res = data;
6031        struct compound_hdr hdr;
6032        int status;
6033
6034        status = decode_compound_hdr(xdr, &hdr);
6035        if (status)
6036                goto out;
6037        status = decode_sequence(xdr, &res->seq_res, rqstp);
6038        if (status)
6039                goto out;
6040        status = decode_putfh(xdr);
6041        if (status)
6042                goto out;
6043        if (res->lr_res) {
6044                status = decode_layoutreturn(xdr, res->lr_res);
6045                res->lr_ret = status;
6046                if (status)
6047                        goto out;
6048        }
6049        status = decode_open_downgrade(xdr, res);
6050out:
6051        return status;
6052}
6053
6054/*
6055 * Decode ACCESS response
6056 */
6057static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6058                               void *data)
6059{
6060        struct nfs4_accessres *res = data;
6061        struct compound_hdr hdr;
6062        int status;
6063
6064        status = decode_compound_hdr(xdr, &hdr);
6065        if (status)
6066                goto out;
6067        status = decode_sequence(xdr, &res->seq_res, rqstp);
6068        if (status)
6069                goto out;
6070        status = decode_putfh(xdr);
6071        if (status != 0)
6072                goto out;
6073        status = decode_access(xdr, &res->supported, &res->access);
6074        if (status != 0)
6075                goto out;
6076        if (res->fattr)
6077                decode_getfattr(xdr, res->fattr, res->server);
6078out:
6079        return status;
6080}
6081
6082/*
6083 * Decode LOOKUP response
6084 */
6085static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086                               void *data)
6087{
6088        struct nfs4_lookup_res *res = data;
6089        struct compound_hdr hdr;
6090        int status;
6091
6092        status = decode_compound_hdr(xdr, &hdr);
6093        if (status)
6094                goto out;
6095        status = decode_sequence(xdr, &res->seq_res, rqstp);
6096        if (status)
6097                goto out;
6098        status = decode_putfh(xdr);
6099        if (status)
6100                goto out;
6101        status = decode_lookup(xdr);
6102        if (status)
6103                goto out;
6104        status = decode_getfh(xdr, res->fh);
6105        if (status)
6106                goto out;
6107        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6108out:
6109        return status;
6110}
6111
6112/*
6113 * Decode LOOKUPP response
6114 */
6115static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6116                void *data)
6117{
6118        struct nfs4_lookupp_res *res = data;
6119        struct compound_hdr hdr;
6120        int status;
6121
6122        status = decode_compound_hdr(xdr, &hdr);
6123        if (status)
6124                goto out;
6125        status = decode_sequence(xdr, &res->seq_res, rqstp);
6126        if (status)
6127                goto out;
6128        status = decode_putfh(xdr);
6129        if (status)
6130                goto out;
6131        status = decode_lookupp(xdr);
6132        if (status)
6133                goto out;
6134        status = decode_getfh(xdr, res->fh);
6135        if (status)
6136                goto out;
6137        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6138out:
6139        return status;
6140}
6141
6142/*
6143 * Decode LOOKUP_ROOT response
6144 */
6145static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6146                                    struct xdr_stream *xdr,
6147                                    void *data)
6148{
6149        struct nfs4_lookup_res *res = data;
6150        struct compound_hdr hdr;
6151        int status;
6152
6153        status = decode_compound_hdr(xdr, &hdr);
6154        if (status)
6155                goto out;
6156        status = decode_sequence(xdr, &res->seq_res, rqstp);
6157        if (status)
6158                goto out;
6159        status = decode_putrootfh(xdr);
6160        if (status)
6161                goto out;
6162        status = decode_getfh(xdr, res->fh);
6163        if (status == 0)
6164                status = decode_getfattr_label(xdr, res->fattr,
6165                                                res->label, res->server);
6166out:
6167        return status;
6168}
6169
6170/*
6171 * Decode REMOVE response
6172 */
6173static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174                               void *data)
6175{
6176        struct nfs_removeres *res = data;
6177        struct compound_hdr hdr;
6178        int status;
6179
6180        status = decode_compound_hdr(xdr, &hdr);
6181        if (status)
6182                goto out;
6183        status = decode_sequence(xdr, &res->seq_res, rqstp);
6184        if (status)
6185                goto out;
6186        status = decode_putfh(xdr);
6187        if (status)
6188                goto out;
6189        status = decode_remove(xdr, &res->cinfo);
6190out:
6191        return status;
6192}
6193
6194/*
6195 * Decode RENAME response
6196 */
6197static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6198                               void *data)
6199{
6200        struct nfs_renameres *res = data;
6201        struct compound_hdr hdr;
6202        int status;
6203
6204        status = decode_compound_hdr(xdr, &hdr);
6205        if (status)
6206                goto out;
6207        status = decode_sequence(xdr, &res->seq_res, rqstp);
6208        if (status)
6209                goto out;
6210        status = decode_putfh(xdr);
6211        if (status)
6212                goto out;
6213        status = decode_savefh(xdr);
6214        if (status)
6215                goto out;
6216        status = decode_putfh(xdr);
6217        if (status)
6218                goto out;
6219        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6220out:
6221        return status;
6222}
6223
6224/*
6225 * Decode LINK response
6226 */
6227static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6228                             void *data)
6229{
6230        struct nfs4_link_res *res = data;
6231        struct compound_hdr hdr;
6232        int status;
6233
6234        status = decode_compound_hdr(xdr, &hdr);
6235        if (status)
6236                goto out;
6237        status = decode_sequence(xdr, &res->seq_res, rqstp);
6238        if (status)
6239                goto out;
6240        status = decode_putfh(xdr);
6241        if (status)
6242                goto out;
6243        status = decode_savefh(xdr);
6244        if (status)
6245                goto out;
6246        status = decode_putfh(xdr);
6247        if (status)
6248                goto out;
6249        status = decode_link(xdr, &res->cinfo);
6250        if (status)
6251                goto out;
6252        /*
6253         * Note order: OP_LINK leaves the directory as the current
6254         *             filehandle.
6255         */
6256        status = decode_restorefh(xdr);
6257        if (status)
6258                goto out;
6259        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6260out:
6261        return status;
6262}
6263
6264/*
6265 * Decode CREATE response
6266 */
6267static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                               void *data)
6269{
6270        struct nfs4_create_res *res = data;
6271        struct compound_hdr hdr;
6272        int status;
6273
6274        status = decode_compound_hdr(xdr, &hdr);
6275        if (status)
6276                goto out;
6277        status = decode_sequence(xdr, &res->seq_res, rqstp);
6278        if (status)
6279                goto out;
6280        status = decode_putfh(xdr);
6281        if (status)
6282                goto out;
6283        status = decode_create(xdr, &res->dir_cinfo);
6284        if (status)
6285                goto out;
6286        status = decode_getfh(xdr, res->fh);
6287        if (status)
6288                goto out;
6289        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290out:
6291        return status;
6292}
6293
6294/*
6295 * Decode SYMLINK response
6296 */
6297static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298                                void *res)
6299{
6300        return nfs4_xdr_dec_create(rqstp, xdr, res);
6301}
6302
6303/*
6304 * Decode GETATTR response
6305 */
6306static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307                                void *data)
6308{
6309        struct nfs4_getattr_res *res = data;
6310        struct compound_hdr hdr;
6311        int status;
6312
6313        status = decode_compound_hdr(xdr, &hdr);
6314        if (status)
6315                goto out;
6316        status = decode_sequence(xdr, &res->seq_res, rqstp);
6317        if (status)
6318                goto out;
6319        status = decode_putfh(xdr);
6320        if (status)
6321                goto out;
6322        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6323out:
6324        return status;
6325}
6326
6327/*
6328 * Encode an SETACL request
6329 */
6330static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6331                                const void *data)
6332{
6333        const struct nfs_setaclargs *args = data;
6334        struct compound_hdr hdr = {
6335                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336        };
6337
6338        encode_compound_hdr(xdr, req, &hdr);
6339        encode_sequence(xdr, &args->seq_args, &hdr);
6340        encode_putfh(xdr, args->fh, &hdr);
6341        encode_setacl(xdr, args, &hdr);
6342        encode_nops(&hdr);
6343}
6344
6345/*
6346 * Decode SETACL response
6347 */
6348static int
6349nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350                    void *data)
6351{
6352        struct nfs_setaclres *res = data;
6353        struct compound_hdr hdr;
6354        int status;
6355
6356        status = decode_compound_hdr(xdr, &hdr);
6357        if (status)
6358                goto out;
6359        status = decode_sequence(xdr, &res->seq_res, rqstp);
6360        if (status)
6361                goto out;
6362        status = decode_putfh(xdr);
6363        if (status)
6364                goto out;
6365        status = decode_setattr(xdr);
6366out:
6367        return status;
6368}
6369
6370/*
6371 * Decode GETACL response
6372 */
6373static int
6374nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375                    void *data)
6376{
6377        struct nfs_getaclres *res = data;
6378        struct compound_hdr hdr;
6379        int status;
6380
6381        if (res->acl_scratch != NULL) {
6382                void *p = page_address(res->acl_scratch);
6383                xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6384        }
6385        status = decode_compound_hdr(xdr, &hdr);
6386        if (status)
6387                goto out;
6388        status = decode_sequence(xdr, &res->seq_res, rqstp);
6389        if (status)
6390                goto out;
6391        status = decode_putfh(xdr);
6392        if (status)
6393                goto out;
6394        status = decode_getacl(xdr, rqstp, res);
6395
6396out:
6397        return status;
6398}
6399
6400/*
6401 * Decode CLOSE response
6402 */
6403static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404                              void *data)
6405{
6406        struct nfs_closeres *res = data;
6407        struct compound_hdr hdr;
6408        int status;
6409
6410        status = decode_compound_hdr(xdr, &hdr);
6411        if (status)
6412                goto out;
6413        status = decode_sequence(xdr, &res->seq_res, rqstp);
6414        if (status)
6415                goto out;
6416        status = decode_putfh(xdr);
6417        if (status)
6418                goto out;
6419        if (res->lr_res) {
6420                status = decode_layoutreturn(xdr, res->lr_res);
6421                res->lr_ret = status;
6422                if (status)
6423                        goto out;
6424        }
6425        if (res->fattr != NULL) {
6426                status = decode_getfattr(xdr, res->fattr, res->server);
6427                if (status != 0)
6428                        goto out;
6429        }
6430        status = decode_close(xdr, res);
6431out:
6432        return status;
6433}
6434
6435/*
6436 * Decode OPEN response
6437 */
6438static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439                             void *data)
6440{
6441        struct nfs_openres *res = data;
6442        struct compound_hdr hdr;
6443        int status;
6444
6445        status = decode_compound_hdr(xdr, &hdr);
6446        if (status)
6447                goto out;
6448        status = decode_sequence(xdr, &res->seq_res, rqstp);
6449        if (status)
6450                goto out;
6451        status = decode_putfh(xdr);
6452        if (status)
6453                goto out;
6454        status = decode_open(xdr, res);
6455        if (status)
6456                goto out;
6457        status = decode_getfh(xdr, &res->fh);
6458        if (status)
6459                goto out;
6460        if (res->access_request)
6461                decode_access(xdr, &res->access_supported, &res->access_result);
6462        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6463        if (res->lg_res)
6464                decode_layoutget(xdr, rqstp, res->lg_res);
6465out:
6466        return status;
6467}
6468
6469/*
6470 * Decode OPEN_CONFIRM response
6471 */
6472static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6473                                     struct xdr_stream *xdr,
6474                                     void *data)
6475{
6476        struct nfs_open_confirmres *res = data;
6477        struct compound_hdr hdr;
6478        int status;
6479
6480        status = decode_compound_hdr(xdr, &hdr);
6481        if (status)
6482                goto out;
6483        status = decode_putfh(xdr);
6484        if (status)
6485                goto out;
6486        status = decode_open_confirm(xdr, res);
6487out:
6488        return status;
6489}
6490
6491/*
6492 * Decode OPEN response
6493 */
6494static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6495                                    struct xdr_stream *xdr,
6496                                    void *data)
6497{
6498        struct nfs_openres *res = data;
6499        struct compound_hdr hdr;
6500        int status;
6501
6502        status = decode_compound_hdr(xdr, &hdr);
6503        if (status)
6504                goto out;
6505        status = decode_sequence(xdr, &res->seq_res, rqstp);
6506        if (status)
6507                goto out;
6508        status = decode_putfh(xdr);
6509        if (status)
6510                goto out;
6511        status = decode_open(xdr, res);
6512        if (status)
6513                goto out;
6514        if (res->access_request)
6515                decode_access(xdr, &res->access_supported, &res->access_result);
6516        decode_getfattr(xdr, res->f_attr, res->server);
6517        if (res->lg_res)
6518                decode_layoutget(xdr, rqstp, res->lg_res);
6519out:
6520        return status;
6521}
6522
6523/*
6524 * Decode SETATTR response
6525 */
6526static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6527                                struct xdr_stream *xdr,
6528                                void *data)
6529{
6530        struct nfs_setattrres *res = data;
6531        struct compound_hdr hdr;
6532        int status;
6533
6534        status = decode_compound_hdr(xdr, &hdr);
6535        if (status)
6536                goto out;
6537        status = decode_sequence(xdr, &res->seq_res, rqstp);
6538        if (status)
6539                goto out;
6540        status = decode_putfh(xdr);
6541        if (status)
6542                goto out;
6543        status = decode_setattr(xdr);
6544        if (status)
6545                goto out;
6546        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6547out:
6548        return status;
6549}
6550
6551/*
6552 * Decode LOCK response
6553 */
6554static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6555                             void *data)
6556{
6557        struct nfs_lock_res *res = data;
6558        struct compound_hdr hdr;
6559        int status;
6560
6561        status = decode_compound_hdr(xdr, &hdr);
6562        if (status)
6563                goto out;
6564        status = decode_sequence(xdr, &res->seq_res, rqstp);
6565        if (status)
6566                goto out;
6567        status = decode_putfh(xdr);
6568        if (status)
6569                goto out;
6570        status = decode_lock(xdr, res);
6571out:
6572        return status;
6573}
6574
6575/*
6576 * Decode LOCKT response
6577 */
6578static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579                              void *data)
6580{
6581        struct nfs_lockt_res *res = data;
6582        struct compound_hdr hdr;
6583        int status;
6584
6585        status = decode_compound_hdr(xdr, &hdr);
6586        if (status)
6587                goto out;
6588        status = decode_sequence(xdr, &res->seq_res, rqstp);
6589        if (status)
6590                goto out;
6591        status = decode_putfh(xdr);
6592        if (status)
6593                goto out;
6594        status = decode_lockt(xdr, res);
6595out:
6596        return status;
6597}
6598
6599/*
6600 * Decode LOCKU response
6601 */
6602static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6603                              void *data)
6604{
6605        struct nfs_locku_res *res = data;
6606        struct compound_hdr hdr;
6607        int status;
6608
6609        status = decode_compound_hdr(xdr, &hdr);
6610        if (status)
6611                goto out;
6612        status = decode_sequence(xdr, &res->seq_res, rqstp);
6613        if (status)
6614                goto out;
6615        status = decode_putfh(xdr);
6616        if (status)
6617                goto out;
6618        status = decode_locku(xdr, res);
6619out:
6620        return status;
6621}
6622
6623static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6624                                          struct xdr_stream *xdr, void *dummy)
6625{
6626        struct compound_hdr hdr;
6627        int status;
6628
6629        status = decode_compound_hdr(xdr, &hdr);
6630        if (!status)
6631                status = decode_release_lockowner(xdr);
6632        return status;
6633}
6634
6635/*
6636 * Decode READLINK response
6637 */
6638static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6639                                 struct xdr_stream *xdr,
6640                                 void *data)
6641{
6642        struct nfs4_readlink_res *res = data;
6643        struct compound_hdr hdr;
6644        int status;
6645
6646        status = decode_compound_hdr(xdr, &hdr);
6647        if (status)
6648                goto out;
6649        status = decode_sequence(xdr, &res->seq_res, rqstp);
6650        if (status)
6651                goto out;
6652        status = decode_putfh(xdr);
6653        if (status)
6654                goto out;
6655        status = decode_readlink(xdr, rqstp);
6656out:
6657        return status;
6658}
6659
6660/*
6661 * Decode READDIR response
6662 */
6663static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6664                                void *data)
6665{
6666        struct nfs4_readdir_res *res = data;
6667        struct compound_hdr hdr;
6668        int status;
6669
6670        status = decode_compound_hdr(xdr, &hdr);
6671        if (status)
6672                goto out;
6673        status = decode_sequence(xdr, &res->seq_res, rqstp);
6674        if (status)
6675                goto out;
6676        status = decode_putfh(xdr);
6677        if (status)
6678                goto out;
6679        status = decode_readdir(xdr, rqstp, res);
6680out:
6681        return status;
6682}
6683
6684/*
6685 * Decode Read response
6686 */
6687static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6688                             void *data)
6689{
6690        struct nfs_pgio_res *res = data;
6691        struct compound_hdr hdr;
6692        int status;
6693
6694        status = decode_compound_hdr(xdr, &hdr);
6695        res->op_status = hdr.status;
6696        if (status)
6697                goto out;
6698        status = decode_sequence(xdr, &res->seq_res, rqstp);
6699        if (status)
6700                goto out;
6701        status = decode_putfh(xdr);
6702        if (status)
6703                goto out;
6704        status = decode_read(xdr, rqstp, res);
6705        if (!status)
6706                status = res->count;
6707out:
6708        return status;
6709}
6710
6711/*
6712 * Decode WRITE response
6713 */
6714static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6715                              void *data)
6716{
6717        struct nfs_pgio_res *res = data;
6718        struct compound_hdr hdr;
6719        int status;
6720
6721        status = decode_compound_hdr(xdr, &hdr);
6722        res->op_status = hdr.status;
6723        if (status)
6724                goto out;
6725        status = decode_sequence(xdr, &res->seq_res, rqstp);
6726        if (status)
6727                goto out;
6728        status = decode_putfh(xdr);
6729        if (status)
6730                goto out;
6731        status = decode_write(xdr, res);
6732        if (status)
6733                goto out;
6734        if (res->fattr)
6735                decode_getfattr(xdr, res->fattr, res->server);
6736        if (!status)
6737                status = res->count;
6738out:
6739        return status;
6740}
6741
6742/*
6743 * Decode COMMIT response
6744 */
6745static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6746                               void *data)
6747{
6748        struct nfs_commitres *res = data;
6749        struct compound_hdr hdr;
6750        int status;
6751
6752        status = decode_compound_hdr(xdr, &hdr);
6753        res->op_status = hdr.status;
6754        if (status)
6755                goto out;
6756        status = decode_sequence(xdr, &res->seq_res, rqstp);
6757        if (status)
6758                goto out;
6759        status = decode_putfh(xdr);
6760        if (status)
6761                goto out;
6762        status = decode_commit(xdr, res);
6763out:
6764        return status;
6765}
6766
6767/*
6768 * Decode FSINFO response
6769 */
6770static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6771                               void *data)
6772{
6773        struct nfs4_fsinfo_res *res = data;
6774        struct compound_hdr hdr;
6775        int status;
6776
6777        status = decode_compound_hdr(xdr, &hdr);
6778        if (!status)
6779                status = decode_sequence(xdr, &res->seq_res, req);
6780        if (!status)
6781                status = decode_putfh(xdr);
6782        if (!status)
6783                status = decode_fsinfo(xdr, res->fsinfo);
6784        return status;
6785}
6786
6787/*
6788 * Decode PATHCONF response
6789 */
6790static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6791                                 void *data)
6792{
6793        struct nfs4_pathconf_res *res = data;
6794        struct compound_hdr hdr;
6795        int status;
6796
6797        status = decode_compound_hdr(xdr, &hdr);
6798        if (!status)
6799                status = decode_sequence(xdr, &res->seq_res, req);
6800        if (!status)
6801                status = decode_putfh(xdr);
6802        if (!status)
6803                status = decode_pathconf(xdr, res->pathconf);
6804        return status;
6805}
6806
6807/*
6808 * Decode STATFS response
6809 */
6810static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6811                               void *data)
6812{
6813        struct nfs4_statfs_res *res = data;
6814        struct compound_hdr hdr;
6815        int status;
6816
6817        status = decode_compound_hdr(xdr, &hdr);
6818        if (!status)
6819                status = decode_sequence(xdr, &res->seq_res, req);
6820        if (!status)
6821                status = decode_putfh(xdr);
6822        if (!status)
6823                status = decode_statfs(xdr, res->fsstat);
6824        return status;
6825}
6826
6827/*
6828 * Decode GETATTR_BITMAP response
6829 */
6830static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6831                                    struct xdr_stream *xdr,
6832                                    void *data)
6833{
6834        struct nfs4_server_caps_res *res = data;
6835        struct compound_hdr hdr;
6836        int status;
6837
6838        status = decode_compound_hdr(xdr, &hdr);
6839        if (status)
6840                goto out;
6841        status = decode_sequence(xdr, &res->seq_res, req);
6842        if (status)
6843                goto out;
6844        status = decode_putfh(xdr);
6845        if (status)
6846                goto out;
6847        status = decode_server_caps(xdr, res);
6848out:
6849        return status;
6850}
6851
6852/*
6853 * Decode RENEW response
6854 */
6855static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856                              void *__unused)
6857{
6858        struct compound_hdr hdr;
6859        int status;
6860
6861        status = decode_compound_hdr(xdr, &hdr);
6862        if (!status)
6863                status = decode_renew(xdr);
6864        return status;
6865}
6866
6867/*
6868 * Decode SETCLIENTID response
6869 */
6870static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6871                                    struct xdr_stream *xdr,
6872                                    void *data)
6873{
6874        struct nfs4_setclientid_res *res = data;
6875        struct compound_hdr hdr;
6876        int status;
6877
6878        status = decode_compound_hdr(xdr, &hdr);
6879        if (!status)
6880                status = decode_setclientid(xdr, res);
6881        return status;
6882}
6883
6884/*
6885 * Decode SETCLIENTID_CONFIRM response
6886 */
6887static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6888                                            struct xdr_stream *xdr,
6889                                            void *data)
6890{
6891        struct compound_hdr hdr;
6892        int status;
6893
6894        status = decode_compound_hdr(xdr, &hdr);
6895        if (!status)
6896                status = decode_setclientid_confirm(xdr);
6897        return status;
6898}
6899
6900/*
6901 * Decode DELEGRETURN response
6902 */
6903static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6904                                    struct xdr_stream *xdr,
6905                                    void *data)
6906{
6907        struct nfs4_delegreturnres *res = data;
6908        struct compound_hdr hdr;
6909        int status;
6910
6911        status = decode_compound_hdr(xdr, &hdr);
6912        if (status)
6913                goto out;
6914        status = decode_sequence(xdr, &res->seq_res, rqstp);
6915        if (status)
6916                goto out;
6917        status = decode_putfh(xdr);
6918        if (status != 0)
6919                goto out;
6920        if (res->lr_res) {
6921                status = decode_layoutreturn(xdr, res->lr_res);
6922                res->lr_ret = status;
6923                if (status)
6924                        goto out;
6925        }
6926        if (res->fattr) {
6927                status = decode_getfattr(xdr, res->fattr, res->server);
6928                if (status != 0)
6929                        goto out;
6930        }
6931        status = decode_delegreturn(xdr);
6932out:
6933        return status;
6934}
6935
6936/*
6937 * Decode FS_LOCATIONS response
6938 */
6939static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6940                                     struct xdr_stream *xdr,
6941                                     void *data)
6942{
6943        struct nfs4_fs_locations_res *res = data;
6944        struct compound_hdr hdr;
6945        int status;
6946
6947        status = decode_compound_hdr(xdr, &hdr);
6948        if (status)
6949                goto out;
6950        status = decode_sequence(xdr, &res->seq_res, req);
6951        if (status)
6952                goto out;
6953        status = decode_putfh(xdr);
6954        if (status)
6955                goto out;
6956        if (res->migration) {
6957                xdr_enter_page(xdr, PAGE_SIZE);
6958                status = decode_getfattr_generic(xdr,
6959                                        &res->fs_locations->fattr,
6960                                         NULL, res->fs_locations,
6961                                         NULL, res->fs_locations->server);
6962                if (status)
6963                        goto out;
6964                if (res->renew)
6965                        status = decode_renew(xdr);
6966        } else {
6967                status = decode_lookup(xdr);
6968                if (status)
6969                        goto out;
6970                xdr_enter_page(xdr, PAGE_SIZE);
6971                status = decode_getfattr_generic(xdr,
6972                                        &res->fs_locations->fattr,
6973                                         NULL, res->fs_locations,
6974                                         NULL, res->fs_locations->server);
6975        }
6976out:
6977        return status;
6978}
6979
6980/*
6981 * Decode SECINFO response
6982 */
6983static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6984                                struct xdr_stream *xdr,
6985                                void *data)
6986{
6987        struct nfs4_secinfo_res *res = data;
6988        struct compound_hdr hdr;
6989        int status;
6990
6991        status = decode_compound_hdr(xdr, &hdr);
6992        if (status)
6993                goto out;
6994        status = decode_sequence(xdr, &res->seq_res, rqstp);
6995        if (status)
6996                goto out;
6997        status = decode_putfh(xdr);
6998        if (status)
6999                goto out;
7000        status = decode_secinfo(xdr, res);

7001out:
7002        return status;
7003}
7004
7005/*
7006 * Decode FSID_PRESENT response
7007 */
7008static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7009                                     struct xdr_stream *xdr,
7010                                     void *data)
7011{
7012        struct nfs4_fsid_present_res *res = data;
7013        struct compound_hdr hdr;
7014        int status;
7015
7016        status = decode_compound_hdr(xdr, &hdr);
7017        if (status)
7018                goto out;
7019        status = decode_sequence(xdr, &res->seq_res, rqstp);
7020        if (status)
7021                goto out;
7022        status = decode_putfh(xdr);
7023        if (status)
7024                goto out;
7025        status = decode_getfh(xdr, res->fh);
7026        if (status)
7027                goto out;
7028        if (res->renew)
7029                status = decode_renew(xdr);
7030out:
7031        return status;
7032}
7033
7034#if defined(CONFIG_NFS_V4_1)
7035/*
7036 * Decode BIND_CONN_TO_SESSION response
7037 */
7038static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7039                                        struct xdr_stream *xdr,
7040                                        void *res)
7041{
7042        struct compound_hdr hdr;
7043        int status;
7044
7045        status = decode_compound_hdr(xdr, &hdr);
7046        if (!status)
7047                status = decode_bind_conn_to_session(xdr, res);
7048        return status;
7049}
7050
7051/*
7052 * Decode EXCHANGE_ID response
7053 */
7054static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7055                                    struct xdr_stream *xdr,
7056                                    void *res)
7057{
7058        struct compound_hdr hdr;
7059        int status;
7060
7061        status = decode_compound_hdr(xdr, &hdr);
7062        if (!status)
7063                status = decode_exchange_id(xdr, res);
7064        return status;
7065}
7066
7067/*
7068 * Decode CREATE_SESSION response
7069 */
7070static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7071                                       struct xdr_stream *xdr,
7072                                       void *res)
7073{
7074        struct compound_hdr hdr;
7075        int status;
7076
7077        status = decode_compound_hdr(xdr, &hdr);
7078        if (!status)
7079                status = decode_create_session(xdr, res);
7080        return status;
7081}
7082
7083/*
7084 * Decode DESTROY_SESSION response
7085 */
7086static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7087                                        struct xdr_stream *xdr,
7088                                        void *res)
7089{
7090        struct compound_hdr hdr;
7091        int status;
7092
7093        status = decode_compound_hdr(xdr, &hdr);
7094        if (!status)
7095                status = decode_destroy_session(xdr, res);
7096        return status;
7097}
7098
7099/*
7100 * Decode DESTROY_CLIENTID response
7101 */
7102static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7103                                        struct xdr_stream *xdr,
7104                                        void *res)
7105{
7106        struct compound_hdr hdr;
7107        int status;
7108
7109        status = decode_compound_hdr(xdr, &hdr);
7110        if (!status)
7111                status = decode_destroy_clientid(xdr, res);
7112        return status;
7113}
7114
7115/*
7116 * Decode SEQUENCE response
7117 */
7118static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7119                                 struct xdr_stream *xdr,
7120                                 void *res)
7121{
7122        struct compound_hdr hdr;
7123        int status;
7124
7125        status = decode_compound_hdr(xdr, &hdr);
7126        if (!status)
7127                status = decode_sequence(xdr, res, rqstp);
7128        return status;
7129}
7130
7131#endif
7132
7133/*
7134 * Decode GET_LEASE_TIME response
7135 */
7136static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7137                                       struct xdr_stream *xdr,
7138                                       void *data)
7139{
7140        struct nfs4_get_lease_time_res *res = data;
7141        struct compound_hdr hdr;
7142        int status;
7143
7144        status = decode_compound_hdr(xdr, &hdr);
7145        if (!status)
7146                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7147        if (!status)
7148                status = decode_putrootfh(xdr);
7149        if (!status)
7150                status = decode_fsinfo(xdr, res->lr_fsinfo);
7151        return status;
7152}
7153
7154#ifdef CONFIG_NFS_V4_1
7155
7156/*
7157 * Decode RECLAIM_COMPLETE response
7158 */
7159static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7160                                         struct xdr_stream *xdr,
7161                                         void *data)
7162{
7163        struct nfs41_reclaim_complete_res *res = data;
7164        struct compound_hdr hdr;
7165        int status;
7166
7167        status = decode_compound_hdr(xdr, &hdr);
7168        if (!status)
7169                status = decode_sequence(xdr, &res->seq_res, rqstp);
7170        if (!status)
7171                status = decode_reclaim_complete(xdr, NULL);
7172        return status;
7173}
7174
7175/*
7176 * Decode GETDEVINFO response
7177 */
7178static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179                                      struct xdr_stream *xdr,
7180                                      void *data)
7181{
7182        struct nfs4_getdeviceinfo_res *res = data;
7183        struct compound_hdr hdr;
7184        int status;
7185
7186        status = decode_compound_hdr(xdr, &hdr);
7187        if (status != 0)
7188                goto out;
7189        status = decode_sequence(xdr, &res->seq_res, rqstp);
7190        if (status != 0)
7191                goto out;
7192        status = decode_getdeviceinfo(xdr, res);
7193out:
7194        return status;
7195}
7196
7197/*
7198 * Decode LAYOUTGET response
7199 */
7200static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7201                                  struct xdr_stream *xdr,
7202                                  void *data)
7203{
7204        struct nfs4_layoutget_res *res = data;
7205        struct compound_hdr hdr;
7206        int status;
7207
7208        status = decode_compound_hdr(xdr, &hdr);
7209        if (status)
7210                goto out;
7211        status = decode_sequence(xdr, &res->seq_res, rqstp);
7212        if (status)
7213                goto out;
7214        status = decode_putfh(xdr);
7215        if (status)
7216                goto out;
7217        status = decode_layoutget(xdr, rqstp, res);
7218out:
7219        return status;
7220}
7221
7222/*
7223 * Decode LAYOUTRETURN response
7224 */
7225static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7226                                     struct xdr_stream *xdr,
7227                                     void *data)
7228{
7229        struct nfs4_layoutreturn_res *res = data;
7230        struct compound_hdr hdr;
7231        int status;
7232
7233        status = decode_compound_hdr(xdr, &hdr);
7234        if (status)
7235                goto out;
7236        status = decode_sequence(xdr, &res->seq_res, rqstp);
7237        if (status)
7238                goto out;
7239        status = decode_putfh(xdr);
7240        if (status)
7241                goto out;
7242        status = decode_layoutreturn(xdr, res);
7243out:
7244        return status;
7245}
7246
7247/*
7248 * Decode LAYOUTCOMMIT response
7249 */
7250static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7251                                     struct xdr_stream *xdr,
7252                                     void *data)
7253{
7254        struct nfs4_layoutcommit_res *res = data;
7255        struct compound_hdr hdr;
7256        int status;
7257
7258        status = decode_compound_hdr(xdr, &hdr);
7259        if (status)
7260                goto out;
7261        status = decode_sequence(xdr, &res->seq_res, rqstp);
7262        if (status)
7263                goto out;
7264        status = decode_putfh(xdr);
7265        if (status)
7266                goto out;
7267        status = decode_layoutcommit(xdr, rqstp, res);
7268        if (status)
7269                goto out;
7270        decode_getfattr(xdr, res->fattr, res->server);
7271out:
7272        return status;
7273}
7274
7275/*
7276 * Decode SECINFO_NO_NAME response
7277 */
7278static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7279                                        struct xdr_stream *xdr,
7280                                        void *data)
7281{
7282        struct nfs4_secinfo_res *res = data;
7283        struct compound_hdr hdr;
7284        int status;
7285
7286        status = decode_compound_hdr(xdr, &hdr);
7287        if (status)
7288                goto out;
7289        status = decode_sequence(xdr, &res->seq_res, rqstp);
7290        if (status)
7291                goto out;
7292        status = decode_putrootfh(xdr);
7293        if (status)
7294                goto out;
7295        status = decode_secinfo_no_name(xdr, res);
7296out:
7297        return status;
7298}
7299
7300/*
7301 * Decode TEST_STATEID response
7302 */
7303static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7304                                     struct xdr_stream *xdr,
7305                                     void *data)
7306{
7307        struct nfs41_test_stateid_res *res = data;
7308        struct compound_hdr hdr;
7309        int status;
7310
7311        status = decode_compound_hdr(xdr, &hdr);
7312        if (status)
7313                goto out;
7314        status = decode_sequence(xdr, &res->seq_res, rqstp);
7315        if (status)
7316                goto out;
7317        status = decode_test_stateid(xdr, res);
7318out:
7319        return status;
7320}
7321
7322/*
7323 * Decode FREE_STATEID response
7324 */
7325static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7326                                     struct xdr_stream *xdr,
7327                                     void *data)
7328{
7329        struct nfs41_free_stateid_res *res = data;
7330        struct compound_hdr hdr;
7331        int status;
7332
7333        status = decode_compound_hdr(xdr, &hdr);
7334        if (status)
7335                goto out;
7336        status = decode_sequence(xdr, &res->seq_res, rqstp);
7337        if (status)
7338                goto out;
7339        status = decode_free_stateid(xdr, res);
7340out:
7341        return status;
7342}
7343#endif /* CONFIG_NFS_V4_1 */
7344
7345/**
7346 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7347 *                      the local page cache.
7348 * @xdr: XDR stream where entry resides
7349 * @entry: buffer to fill in with entry data
7350 * @plus: boolean indicating whether this should be a readdirplus entry
7351 *
7352 * Returns zero if successful, otherwise a negative errno value is
7353 * returned.
7354 *
7355 * This function is not invoked during READDIR reply decoding, but
7356 * rather whenever an application invokes the getdents(2) system call
7357 * on a directory already in our cache.
7358 */
7359int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7360                       bool plus)
7361{
7362        unsigned int savep;
7363        uint32_t bitmap[3] = {0};
7364        uint32_t len;
7365        uint64_t new_cookie;
7366        __be32 *p = xdr_inline_decode(xdr, 4);
7367        if (unlikely(!p))
7368                return -EAGAIN;
7369        if (*p == xdr_zero) {
7370                p = xdr_inline_decode(xdr, 4);
7371                if (unlikely(!p))
7372                        return -EAGAIN;
7373                if (*p == xdr_zero)
7374                        return -EAGAIN;
7375                entry->eof = 1;
7376                return -EBADCOOKIE;
7377        }
7378
7379        p = xdr_inline_decode(xdr, 12);
7380        if (unlikely(!p))
7381                return -EAGAIN;
7382        p = xdr_decode_hyper(p, &new_cookie);
7383        entry->len = be32_to_cpup(p);
7384
7385        p = xdr_inline_decode(xdr, entry->len);
7386        if (unlikely(!p))
7387                return -EAGAIN;
7388        entry->name = (const char *) p;
7389
7390        /*
7391         * In case the server doesn't return an inode number,
7392         * we fake one here.  (We don't use inode number 0,
7393         * since glibc seems to choke on it...)
7394         */
7395        entry->ino = 1;
7396        entry->fattr->valid = 0;
7397
7398        if (decode_attr_bitmap(xdr, bitmap) < 0)
7399                return -EAGAIN;
7400
7401        if (decode_attr_length(xdr, &len, &savep) < 0)
7402                return -EAGAIN;
7403
7404        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7405                        NULL, entry->label, entry->server) < 0)
7406                return -EAGAIN;
7407        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7408                entry->ino = entry->fattr->mounted_on_fileid;
7409        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7410                entry->ino = entry->fattr->fileid;
7411
7412        entry->d_type = DT_UNKNOWN;
7413        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7414                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7415
7416        entry->prev_cookie = entry->cookie;
7417        entry->cookie = new_cookie;
7418
7419        return 0;
7420}
7421
7422/*
7423 * We need to translate between nfs status return values and
7424 * the local errno values which may not be the same.
7425 */
7426static struct {
7427        int stat;
7428        int errno;
7429} nfs_errtbl[] = {
7430        { NFS4_OK,              0               },
7431        { NFS4ERR_PERM,         -EPERM          },
7432        { NFS4ERR_NOENT,        -ENOENT         },
7433        { NFS4ERR_IO,           -errno_NFSERR_IO},
7434        { NFS4ERR_NXIO,         -ENXIO          },
7435        { NFS4ERR_ACCESS,       -EACCES         },
7436        { NFS4ERR_EXIST,        -EEXIST         },
7437        { NFS4ERR_XDEV,         -EXDEV          },
7438        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7439        { NFS4ERR_ISDIR,        -EISDIR         },
7440        { NFS4ERR_INVAL,        -EINVAL         },
7441        { NFS4ERR_FBIG,         -EFBIG          },
7442        { NFS4ERR_NOSPC,        -ENOSPC         },
7443        { NFS4ERR_ROFS,         -EROFS          },
7444        { NFS4ERR_MLINK,        -EMLINK         },
7445        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7446        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7447        { NFS4ERR_DQUOT,        -EDQUOT         },
7448        { NFS4ERR_STALE,        -ESTALE         },
7449        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7450        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7451        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7452        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7453        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7454        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7455        { NFS4ERR_LOCKED,       -EAGAIN         },
7456        { NFS4ERR_SYMLINK,      -ELOOP          },
7457        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7458        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7459        { -1,                   -EIO            }
7460};
7461
7462/*
7463 * Convert an NFS error code to a local one.
7464 * This one is used jointly by NFSv2 and NFSv3.
7465 */
7466static int
7467nfs4_stat_to_errno(int stat)
7468{
7469        int i;
7470        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7471                if (nfs_errtbl[i].stat == stat)
7472                        return nfs_errtbl[i].errno;
7473        }
7474        if (stat <= 10000 || stat > 10100) {
7475                /* The server is looney tunes. */
7476                return -EREMOTEIO;
7477        }
7478        /* If we cannot translate the error, the recovery routines should
7479         * handle it.
7480         * Note: remaining NFSv4 error codes have values > 10000, so should
7481         * not conflict with native Linux error codes.
7482         */
7483        return -stat;
7484}
7485
7486#ifdef CONFIG_NFS_V4_2
7487#include "nfs42xdr.c"
7488#endif /* CONFIG_NFS_V4_2 */
7489
7490#define PROC(proc, argtype, restype)                            \
7491[NFSPROC4_CLNT_##proc] = {                                      \
7492        .p_proc   = NFSPROC4_COMPOUND,                          \
7493        .p_encode = nfs4_xdr_##argtype,                         \
7494        .p_decode = nfs4_xdr_##restype,                         \
7495        .p_arglen = NFS4_##argtype##_sz,                        \
7496        .p_replen = NFS4_##restype##_sz,                        \
7497        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7498        .p_name   = #proc,                                      \
7499}
7500
7501#define STUB(proc)              \
7502[NFSPROC4_CLNT_##proc] = {      \
7503        .p_name = #proc,        \
7504}
7505
7506#if defined(CONFIG_NFS_V4_1)
7507#define PROC41(proc, argtype, restype)                          \
7508        PROC(proc, argtype, restype)
7509#else
7510#define PROC41(proc, argtype, restype)                          \
7511        STUB(proc)
7512#endif
7513
7514#if defined(CONFIG_NFS_V4_2)
7515#define PROC42(proc, argtype, restype)                          \
7516        PROC(proc, argtype, restype)
7517#else
7518#define PROC42(proc, argtype, restype)                          \
7519        STUB(proc)
7520#endif
7521
7522const struct rpc_procinfo nfs4_procedures[] = {
7523        PROC(READ,              enc_read,               dec_read),
7524        PROC(WRITE,             enc_write,              dec_write),
7525        PROC(COMMIT,            enc_commit,             dec_commit),
7526        PROC(OPEN,              enc_open,               dec_open),
7527        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7528        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7529        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7530        PROC(CLOSE,             enc_close,              dec_close),
7531        PROC(SETATTR,           enc_setattr,            dec_setattr),
7532        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7533        PROC(RENEW,             enc_renew,              dec_renew),
7534        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7535        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7536        PROC(LOCK,              enc_lock,               dec_lock),
7537        PROC(LOCKT,             enc_lockt,              dec_lockt),
7538        PROC(LOCKU,             enc_locku,              dec_locku),
7539        PROC(ACCESS,            enc_access,             dec_access),
7540        PROC(GETATTR,           enc_getattr,            dec_getattr),
7541        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7542        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7543        PROC(REMOVE,            enc_remove,             dec_remove),
7544        PROC(RENAME,            enc_rename,             dec_rename),
7545        PROC(LINK,              enc_link,               dec_link),
7546        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7547        PROC(CREATE,            enc_create,             dec_create),
7548        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7549        PROC(STATFS,            enc_statfs,             dec_statfs),
7550        PROC(READLINK,          enc_readlink,           dec_readlink),
7551        PROC(READDIR,           enc_readdir,            dec_readdir),
7552        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7553        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7554        PROC(GETACL,            enc_getacl,             dec_getacl),
7555        PROC(SETACL,            enc_setacl,             dec_setacl),
7556        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7557        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7558        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7559        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7560        PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7561        PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7562        PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7563        PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7564        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7565        PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7566        PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7567        PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7568        PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7569        PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7570        PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7571        PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7572        PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7573        STUB(GETDEVICELIST),
7574        PROC41(BIND_CONN_TO_SESSION,
7575                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7576        PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7577        PROC42(SEEK,            enc_seek,               dec_seek),
7578        PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7579        PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7580        PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7581        PROC42(CLONE,           enc_clone,              dec_clone),
7582        PROC42(COPY,            enc_copy,               dec_copy),
7583        PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7584        PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7585        PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7586};
7587
7588static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7589const struct rpc_version nfs_version4 = {
7590        .number                 = 4,
7591        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7592        .procs                  = nfs4_procedures,
7593        .counts                 = nfs_version4_counts,
7594};
7595
7596/*
7597 * Local variables:
7598 *  c-basic-offset: 8
7599 * End:
7600 */
7601