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

1001                return ret;
1002        return len;
1003}
1004
1005static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
1006                __u32 *res, size_t len)
1007{
1008        size_t i;
1009        __u32 tmp;
1010
1011        while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1012                len--;
1013        for (i = len; i-- > 0;) {
1014                tmp = bitmap[i] & mask[i];
1015                res[i] = tmp;
1016        }
1017        return len;
1018}
1019
1020static void encode_nfs4_seqid(struct xdr_stream *xdr,
1021                const struct nfs_seqid *seqid)
1022{
1023        if (seqid != NULL)
1024                encode_uint32(xdr, seqid->sequence->counter);
1025        else
1026                encode_uint32(xdr, 0);
1027}
1028
1029static void encode_compound_hdr(struct xdr_stream *xdr,
1030                                struct rpc_rqst *req,
1031                                struct compound_hdr *hdr)
1032{
1033        __be32 *p;
1034
1035        /* initialize running count of expected bytes in reply.
1036         * NOTE: the replied tag SHOULD be the same is the one sent,
1037         * but this is not required as a MUST for the server to do so. */
1038        hdr->replen = 3 + hdr->taglen;
1039
1040        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1041        encode_string(xdr, hdr->taglen, hdr->tag);
1042        p = reserve_space(xdr, 8);
1043        *p++ = cpu_to_be32(hdr->minorversion);
1044        hdr->nops_p = p;
1045        *p = cpu_to_be32(hdr->nops);
1046}
1047
1048static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1049                uint32_t replen,
1050                struct compound_hdr *hdr)
1051{
1052        encode_uint32(xdr, op);
1053        hdr->nops++;
1054        hdr->replen += replen;
1055}
1056
1057static void encode_nops(struct compound_hdr *hdr)
1058{
1059        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1060        *hdr->nops_p = htonl(hdr->nops);
1061}
1062
1063static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1064{
1065        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1066}
1067
1068static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1069{
1070        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1071}
1072
1073static __be32 *
1074xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1075{
1076        p = xdr_encode_hyper(p, t->tv_sec);
1077        *p++ = cpu_to_be32(t->tv_nsec);
1078        return p;
1079}
1080
1081static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1082                                const struct nfs4_label *label,
1083                                const umode_t *umask,
1084                                const struct nfs_server *server,
1085                                const uint32_t attrmask[])
1086{
1087        char owner_name[IDMAP_NAMESZ];
1088        char owner_group[IDMAP_NAMESZ];
1089        int owner_namelen = 0;
1090        int owner_grouplen = 0;
1091        __be32 *p;
1092        uint32_t len = 0;
1093        uint32_t bmval[3] = { 0 };
1094
1095        /*
1096         * We reserve enough space to write the entire attribute buffer at once.
1097         */
1098        if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1099                bmval[0] |= FATTR4_WORD0_SIZE;
1100                len += 8;
1101        }
1102        if (iap->ia_valid & ATTR_MODE) {
1103                if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1104                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1105                        len += 8;
1106                } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1107                        bmval[1] |= FATTR4_WORD1_MODE;
1108                        len += 4;
1109                }
1110        }
1111        if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1112                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1113                if (owner_namelen < 0) {
1114                        dprintk("nfs: couldn't resolve uid %d to string\n",
1115                                        from_kuid(&init_user_ns, iap->ia_uid));
1116                        /* XXX */
1117                        strcpy(owner_name, "nobody");
1118                        owner_namelen = sizeof("nobody") - 1;
1119                        /* goto out; */
1120                }
1121                bmval[1] |= FATTR4_WORD1_OWNER;
1122                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1123        }
1124        if ((iap->ia_valid & ATTR_GID) &&
1125           (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1126                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1127                if (owner_grouplen < 0) {
1128                        dprintk("nfs: couldn't resolve gid %d to string\n",
1129                                        from_kgid(&init_user_ns, iap->ia_gid));
1130                        strcpy(owner_group, "nobody");
1131                        owner_grouplen = sizeof("nobody") - 1;
1132                        /* goto out; */
1133                }
1134                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1135                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1136        }
1137        if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1138                if (iap->ia_valid & ATTR_ATIME_SET) {
1139                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1140                        len += 4 + (nfstime4_maxsz << 2);
1141                } else if (iap->ia_valid & ATTR_ATIME) {
1142                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1143                        len += 4;
1144                }
1145        }
1146        if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1147                if (iap->ia_valid & ATTR_MTIME_SET) {
1148                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1149                        len += 4 + (nfstime4_maxsz << 2);
1150                } else if (iap->ia_valid & ATTR_MTIME) {
1151                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1152                        len += 4;
1153                }
1154        }
1155
1156        if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1157                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1158                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1159        }
1160
1161        xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1162        xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1163
1164        if (bmval[0] & FATTR4_WORD0_SIZE)
1165                p = xdr_encode_hyper(p, iap->ia_size);
1166        if (bmval[1] & FATTR4_WORD1_MODE)
1167                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1168        if (bmval[1] & FATTR4_WORD1_OWNER)
1169                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1170        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1171                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1172        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1173                if (iap->ia_valid & ATTR_ATIME_SET) {
1174                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1175                        p = xdr_encode_nfstime4(p, &iap->ia_atime);
1176                } else
1177                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1178        }
1179        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1180                if (iap->ia_valid & ATTR_MTIME_SET) {
1181                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1182                        p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1183                } else
1184                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1185        }
1186        if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1187                *p++ = cpu_to_be32(label->lfs);
1188                *p++ = cpu_to_be32(label->pi);
1189                *p++ = cpu_to_be32(label->len);
1190                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1191        }
1192        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1193                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1194                *p++ = cpu_to_be32(*umask);
1195        }
1196
1197/* out: */
1198}
1199
1200static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1201{
1202        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1203        encode_uint32(xdr, access);
1204}
1205
1206static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1207{
1208        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1209        encode_nfs4_seqid(xdr, arg->seqid);
1210        encode_nfs4_stateid(xdr, &arg->stateid);
1211}
1212
1213static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1214{
1215        __be32 *p;
1216
1217        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1218        p = reserve_space(xdr, 12);
1219        p = xdr_encode_hyper(p, args->offset);
1220        *p = cpu_to_be32(args->count);
1221}
1222
1223static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1224{
1225        __be32 *p;
1226
1227        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1228        encode_uint32(xdr, create->ftype);
1229
1230        switch (create->ftype) {
1231        case NF4LNK:
1232                p = reserve_space(xdr, 4);
1233                *p = cpu_to_be32(create->u.symlink.len);
1234                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1235                                create->u.symlink.len);
1236                xdr->buf->flags |= XDRBUF_WRITE;
1237                break;
1238
1239        case NF4BLK: case NF4CHR:
1240                p = reserve_space(xdr, 8);
1241                *p++ = cpu_to_be32(create->u.device.specdata1);
1242                *p = cpu_to_be32(create->u.device.specdata2);
1243                break;
1244
1245        default:
1246                break;
1247        }
1248
1249        encode_string(xdr, create->name->len, create->name->name);
1250        encode_attrs(xdr, create->attrs, create->label, &create->umask,
1251                        create->server, create->server->attr_bitmask);
1252}
1253
1254static void encode_getattr(struct xdr_stream *xdr,
1255                const __u32 *bitmap, const __u32 *mask, size_t len,
1256                struct compound_hdr *hdr)
1257{
1258        __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1259
1260        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1261        if (mask) {
1262                if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1263                        len = ARRAY_SIZE(masked_bitmap);
1264                len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1265                bitmap = masked_bitmap;
1266        }
1267        xdr_encode_bitmap4(xdr, bitmap, len);
1268}
1269
1270static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1271{
1272        encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1273                        ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1274}
1275
1276static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1277                                 const u32 *open_bitmap,
1278                                 struct compound_hdr *hdr)
1279{
1280        encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1281}
1282
1283static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1284{
1285        encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1286                        ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1287}
1288
1289static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1290{
1291        encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1292                        ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1293}
1294
1295static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1296{
1297        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1298}
1299
1300static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1301{
1302        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1303        encode_string(xdr, name->len, name->name);
1304}
1305
1306static inline int nfs4_lock_type(struct file_lock *fl, int block)
1307{
1308        if (fl->fl_type == F_RDLCK)
1309                return block ? NFS4_READW_LT : NFS4_READ_LT;
1310        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1311}
1312
1313static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1314{
1315        if (fl->fl_end == OFFSET_MAX)
1316                return ~(uint64_t)0;
1317        return fl->fl_end - fl->fl_start + 1;
1318}
1319
1320static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1321{
1322        __be32 *p;
1323
1324        p = reserve_space(xdr, 32);
1325        p = xdr_encode_hyper(p, lowner->clientid);
1326        *p++ = cpu_to_be32(20);
1327        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1328        *p++ = cpu_to_be32(lowner->s_dev);
1329        xdr_encode_hyper(p, lowner->id);
1330}
1331
1332/*
1333 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1334 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1335 */
1336static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1337{
1338        __be32 *p;
1339
1340        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1341        p = reserve_space(xdr, 28);
1342        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1343        *p++ = cpu_to_be32(args->reclaim);
1344        p = xdr_encode_hyper(p, args->fl->fl_start);
1345        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1346        *p = cpu_to_be32(args->new_lock_owner);
1347        if (args->new_lock_owner){
1348                encode_nfs4_seqid(xdr, args->open_seqid);
1349                encode_nfs4_stateid(xdr, &args->open_stateid);
1350                encode_nfs4_seqid(xdr, args->lock_seqid);
1351                encode_lockowner(xdr, &args->lock_owner);
1352        }
1353        else {
1354                encode_nfs4_stateid(xdr, &args->lock_stateid);
1355                encode_nfs4_seqid(xdr, args->lock_seqid);
1356        }
1357}
1358
1359static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1360{
1361        __be32 *p;
1362
1363        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1364        p = reserve_space(xdr, 20);
1365        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1366        p = xdr_encode_hyper(p, args->fl->fl_start);
1367        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1368        encode_lockowner(xdr, &args->lock_owner);
1369}
1370
1371static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1372{
1373        __be32 *p;
1374
1375        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1376        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1377        encode_nfs4_seqid(xdr, args->seqid);
1378        encode_nfs4_stateid(xdr, &args->stateid);
1379        p = reserve_space(xdr, 16);
1380        p = xdr_encode_hyper(p, args->fl->fl_start);
1381        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1382}
1383
1384static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1385{
1386        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1387        encode_lockowner(xdr, lowner);
1388}
1389
1390static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1391{
1392        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1393        encode_string(xdr, name->len, name->name);
1394}
1395
1396static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397{
1398        encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1399}
1400
1401static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1402{
1403        __be32 *p;
1404
1405        p = reserve_space(xdr, 8);
1406        *p++ = cpu_to_be32(share_access);
1407        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1408}
1409
1410static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1411{
1412        __be32 *p;
1413 /*
1414 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1415 * owner 4 = 32
1416 */
1417        encode_nfs4_seqid(xdr, arg->seqid);
1418        encode_share_access(xdr, arg->share_access);
1419        p = reserve_space(xdr, 36);
1420        p = xdr_encode_hyper(p, arg->clientid);
1421        *p++ = cpu_to_be32(24);
1422        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1423        *p++ = cpu_to_be32(arg->server->s_dev);
1424        *p++ = cpu_to_be32(arg->id.uniquifier);
1425        xdr_encode_hyper(p, arg->id.create_time);
1426}
1427
1428static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1429{
1430        __be32 *p;
1431
1432        p = reserve_space(xdr, 4);
1433        switch(arg->createmode) {
1434        case NFS4_CREATE_UNCHECKED:
1435                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1436                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1437                                arg->server, arg->server->attr_bitmask);
1438                break;
1439        case NFS4_CREATE_GUARDED:
1440                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1441                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1442                                arg->server, arg->server->attr_bitmask);
1443                break;
1444        case NFS4_CREATE_EXCLUSIVE:
1445                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1446                encode_nfs4_verifier(xdr, &arg->u.verifier);
1447                break;
1448        case NFS4_CREATE_EXCLUSIVE4_1:
1449                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1450                encode_nfs4_verifier(xdr, &arg->u.verifier);
1451                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1452                                arg->server, arg->server->exclcreat_bitmask);
1453        }
1454}
1455
1456static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1457{
1458        __be32 *p;
1459
1460        p = reserve_space(xdr, 4);
1461        switch (arg->open_flags & O_CREAT) {
1462        case 0:
1463                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1464                break;
1465        default:
1466                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1467                encode_createmode(xdr, arg);
1468        }
1469}
1470
1471static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1472{
1473        __be32 *p;
1474
1475        p = reserve_space(xdr, 4);
1476        switch (delegation_type) {
1477        case 0:
1478                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1479                break;
1480        case FMODE_READ:
1481                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1482                break;
1483        case FMODE_WRITE|FMODE_READ:
1484                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1485                break;
1486        default:
1487                BUG();
1488        }
1489}
1490
1491static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1492{
1493        __be32 *p;
1494
1495        p = reserve_space(xdr, 4);
1496        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1497        encode_string(xdr, name->len, name->name);
1498}
1499
1500static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1501{
1502        __be32 *p;
1503
1504        p = reserve_space(xdr, 4);
1505        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1506        encode_delegation_type(xdr, type);
1507}
1508
1509static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1510{
1511        __be32 *p;
1512
1513        p = reserve_space(xdr, 4);
1514        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1515        encode_nfs4_stateid(xdr, stateid);
1516        encode_string(xdr, name->len, name->name);
1517}
1518
1519static inline void encode_claim_fh(struct xdr_stream *xdr)
1520{
1521        __be32 *p;
1522
1523        p = reserve_space(xdr, 4);
1524        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1525}
1526
1527static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1528{
1529        __be32 *p;
1530
1531        p = reserve_space(xdr, 4);
1532        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1533        encode_nfs4_stateid(xdr, stateid);
1534}
1535
1536static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1537{
1538        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1539        encode_openhdr(xdr, arg);
1540        encode_opentype(xdr, arg);
1541        switch (arg->claim) {
1542        case NFS4_OPEN_CLAIM_NULL:
1543                encode_claim_null(xdr, arg->name);
1544                break;
1545        case NFS4_OPEN_CLAIM_PREVIOUS:
1546                encode_claim_previous(xdr, arg->u.delegation_type);
1547                break;
1548        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1549                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1550                break;
1551        case NFS4_OPEN_CLAIM_FH:
1552                encode_claim_fh(xdr);
1553                break;
1554        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1556                break;
1557        default:
1558                BUG();
1559        }
1560}
1561
1562static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1563{
1564        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1565        encode_nfs4_stateid(xdr, arg->stateid);
1566        encode_nfs4_seqid(xdr, arg->seqid);
1567}
1568
1569static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1570{
1571        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1572        encode_nfs4_stateid(xdr, &arg->stateid);
1573        encode_nfs4_seqid(xdr, arg->seqid);
1574        encode_share_access(xdr, arg->share_access);
1575}
1576
1577static void
1578encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1579{
1580        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1581        encode_string(xdr, fh->size, fh->data);
1582}
1583
1584static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1585{
1586        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1587}
1588
1589static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1590                        struct compound_hdr *hdr)
1591{
1592        __be32 *p;
1593
1594        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1595        encode_nfs4_stateid(xdr, &args->stateid);
1596
1597        p = reserve_space(xdr, 12);
1598        p = xdr_encode_hyper(p, args->offset);
1599        *p = cpu_to_be32(args->count);
1600}
1601
1602static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1603{
1604        uint32_t attrs[3] = {
1605                FATTR4_WORD0_RDATTR_ERROR,
1606                FATTR4_WORD1_MOUNTED_ON_FILEID,
1607        };
1608        uint32_t dircount = readdir->count >> 1;
1609        __be32 *p, verf[2];
1610        uint32_t attrlen = 0;
1611        unsigned int i;
1612
1613        if (readdir->plus) {
1614                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1615                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1616                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1617                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1618                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1619                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1620                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1621                dircount >>= 1;
1622        }
1623        /* Use mounted_on_fileid only if the server supports it */
1624        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1625                attrs[0] |= FATTR4_WORD0_FILEID;
1626        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1627                attrs[i] &= readdir->bitmask[i];
1628                if (attrs[i] != 0)
1629                        attrlen = i+1;
1630        }
1631
1632        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1633        encode_uint64(xdr, readdir->cookie);
1634        encode_nfs4_verifier(xdr, &readdir->verifier);
1635        p = reserve_space(xdr, 12 + (attrlen << 2));
1636        *p++ = cpu_to_be32(dircount);
1637        *p++ = cpu_to_be32(readdir->count);
1638        *p++ = cpu_to_be32(attrlen);
1639        for (i = 0; i < attrlen; i++)
1640                *p++ = cpu_to_be32(attrs[i]);
1641        memcpy(verf, readdir->verifier.data, sizeof(verf));
1642
1643        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1644                        __func__,
1645                        (unsigned long long)readdir->cookie,
1646                        verf[0], verf[1],
1647                        attrs[0] & readdir->bitmask[0],
1648                        attrs[1] & readdir->bitmask[1],
1649                        attrs[2] & readdir->bitmask[2]);
1650}
1651
1652static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1653{
1654        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1655}
1656
1657static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1658{
1659        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1660        encode_string(xdr, name->len, name->name);
1661}
1662
1663static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1664{
1665        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1666        encode_string(xdr, oldname->len, oldname->name);
1667        encode_string(xdr, newname->len, newname->name);
1668}
1669
1670static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1671                         struct compound_hdr *hdr)
1672{
1673        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1674        encode_uint64(xdr, clid);
1675}
1676
1677static void
1678encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1679{
1680        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1681}
1682
1683static void
1684encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1685                struct compound_hdr *hdr)
1686{
1687        __be32 *p;
1688
1689        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1690        encode_nfs4_stateid(xdr, &zero_stateid);
1691        p = reserve_space(xdr, 2*4);
1692        *p++ = cpu_to_be32(1);
1693        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1694        p = reserve_space(xdr, 4);
1695        *p = cpu_to_be32(arg->acl_len);
1696        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1697}
1698
1699static void
1700encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1701{
1702        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1703}
1704
1705static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1706{
1707        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1708        encode_nfs4_stateid(xdr, &arg->stateid);
1709        encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1710                        server->attr_bitmask);
1711}
1712
1713static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1714{
1715        __be32 *p;
1716
1717        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1718        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1719
1720        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1721                        setclientid->sc_clnt->cl_owner_id);
1722        p = reserve_space(xdr, 4);
1723        *p = cpu_to_be32(setclientid->sc_prog);
1724        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1725        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1726        p = reserve_space(xdr, 4);
1727        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1728}
1729
1730static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1731{
1732        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1733                        decode_setclientid_confirm_maxsz, hdr);
1734        encode_uint64(xdr, arg->clientid);
1735        encode_nfs4_verifier(xdr, &arg->confirm);
1736}
1737
1738static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1739                         struct compound_hdr *hdr)
1740{
1741        __be32 *p;
1742
1743        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1744        encode_nfs4_stateid(xdr, &args->stateid);
1745
1746        p = reserve_space(xdr, 16);
1747        p = xdr_encode_hyper(p, args->offset);
1748        *p++ = cpu_to_be32(args->stable);
1749        *p = cpu_to_be32(args->count);
1750
1751        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1752}
1753
1754static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1755{
1756        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1757        encode_nfs4_stateid(xdr, stateid);
1758}
1759
1760static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1761{
1762        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1763        encode_string(xdr, name->len, name->name);
1764}
1765
1766#if defined(CONFIG_NFS_V4_1)
1767/* NFSv4.1 operations */
1768static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1769                                   const struct nfs41_bind_conn_to_session_args *args,
1770                                   struct compound_hdr *hdr)
1771{
1772        __be32 *p;
1773
1774        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1775                decode_bind_conn_to_session_maxsz, hdr);
1776        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1777        p = xdr_reserve_space(xdr, 8);
1778        *p++ = cpu_to_be32(args->dir);
1779        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1780}
1781
1782static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1783{
1784        unsigned int i;
1785        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1786        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1787                encode_uint32(xdr, op_map->u.words[i]);
1788}
1789
1790static void encode_exchange_id(struct xdr_stream *xdr,
1791                               const struct nfs41_exchange_id_args *args,
1792                               struct compound_hdr *hdr)
1793{
1794        __be32 *p;
1795        char impl_name[IMPL_NAME_LIMIT];
1796        int len = 0;
1797
1798        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1799        encode_nfs4_verifier(xdr, &args->verifier);
1800
1801        encode_string(xdr, strlen(args->client->cl_owner_id),
1802                        args->client->cl_owner_id);
1803
1804        encode_uint32(xdr, args->flags);
1805        encode_uint32(xdr, args->state_protect.how);
1806
1807        switch (args->state_protect.how) {
1808        case SP4_NONE:
1809                break;
1810        case SP4_MACH_CRED:
1811                encode_op_map(xdr, &args->state_protect.enforce);
1812                encode_op_map(xdr, &args->state_protect.allow);
1813                break;
1814        default:
1815                WARN_ON_ONCE(1);
1816                break;
1817        }
1818
1819        if (send_implementation_id &&
1820            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1821            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1822                <= sizeof(impl_name) + 1)
1823                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1824                               utsname()->sysname, utsname()->release,
1825                               utsname()->version, utsname()->machine);
1826
1827        if (len > 0) {
1828                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1829
1830                encode_string(xdr,
1831                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1832                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1833                encode_string(xdr, len, impl_name);
1834                /* just send zeros for nii_date - the date is in nii_name */
1835                p = reserve_space(xdr, 12);
1836                p = xdr_encode_hyper(p, 0);
1837                *p = cpu_to_be32(0);
1838        } else
1839                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1840}
1841
1842static void encode_create_session(struct xdr_stream *xdr,
1843                                  const struct nfs41_create_session_args *args,
1844                                  struct compound_hdr *hdr)
1845{
1846        __be32 *p;
1847        struct nfs_client *clp = args->client;
1848        struct rpc_clnt *clnt = clp->cl_rpcclient;
1849        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1850        u32 max_resp_sz_cached;
1851
1852        /*
1853         * Assumes OPEN is the biggest non-idempotent compound.
1854         * 2 is the verifier.
1855         */
1856        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1857                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1858
1859        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1860        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1861        p = xdr_encode_hyper(p, args->clientid);
1862        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1863        *p++ = cpu_to_be32(args->flags);                        /*flags */
1864
1865        /* Fore Channel */
1866        *p++ = cpu_to_be32(0);                          /* header padding size */
1867        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1868        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1869        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1870        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1871        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1872        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1873
1874        /* Back Channel */
1875        *p++ = cpu_to_be32(0);                          /* header padding size */
1876        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1877        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1878        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1879        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1880        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1881        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1882
1883        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1884        *p++ = cpu_to_be32(1);
1885        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1886
1887        /* authsys_parms rfc1831 */
1888        *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1889        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1890        *p++ = cpu_to_be32(0);                          /* UID */
1891        *p++ = cpu_to_be32(0);                          /* GID */
1892        *p = cpu_to_be32(0);                            /* No more gids */
1893}
1894
1895static void encode_destroy_session(struct xdr_stream *xdr,
1896                                   const struct nfs4_session *session,
1897                                   struct compound_hdr *hdr)
1898{
1899        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1900        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1901}
1902
1903static void encode_destroy_clientid(struct xdr_stream *xdr,
1904                                   uint64_t clientid,
1905                                   struct compound_hdr *hdr)
1906{
1907        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1908        encode_uint64(xdr, clientid);
1909}
1910
1911static void encode_reclaim_complete(struct xdr_stream *xdr,
1912                                    const struct nfs41_reclaim_complete_args *args,
1913                                    struct compound_hdr *hdr)
1914{
1915        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1916        encode_uint32(xdr, args->one_fs);
1917}
1918#endif /* CONFIG_NFS_V4_1 */
1919
1920static void encode_sequence(struct xdr_stream *xdr,
1921                            const struct nfs4_sequence_args *args,
1922                            struct compound_hdr *hdr)
1923{
1924#if defined(CONFIG_NFS_V4_1)
1925        struct nfs4_session *session;
1926        struct nfs4_slot_table *tp;
1927        struct nfs4_slot *slot = args->sa_slot;
1928        __be32 *p;
1929
1930        tp = slot->table;
1931        session = tp->session;
1932        if (!session)
1933                return;
1934
1935        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1936
1937        /*
1938         * Sessionid + seqid + slotid + max slotid + cache_this
1939         */
1940        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1941                "max_slotid=%d cache_this=%d\n",
1942                __func__,
1943                ((u32 *)session->sess_id.data)[0],
1944                ((u32 *)session->sess_id.data)[1],
1945                ((u32 *)session->sess_id.data)[2],
1946                ((u32 *)session->sess_id.data)[3],
1947                slot->seq_nr, slot->slot_nr,
1948                tp->highest_used_slotid, args->sa_cache_this);
1949        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1950        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1951        *p++ = cpu_to_be32(slot->seq_nr);
1952        *p++ = cpu_to_be32(slot->slot_nr);
1953        *p++ = cpu_to_be32(tp->highest_used_slotid);
1954        *p = cpu_to_be32(args->sa_cache_this);
1955#endif /* CONFIG_NFS_V4_1 */
1956}
1957
1958#ifdef CONFIG_NFS_V4_1
1959static void
1960encode_getdeviceinfo(struct xdr_stream *xdr,
1961                     const struct nfs4_getdeviceinfo_args *args,
1962                     struct compound_hdr *hdr)
1963{
1964        __be32 *p;
1965
1966        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1967        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1968        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1969                                    NFS4_DEVICEID4_SIZE);
1970        *p++ = cpu_to_be32(args->pdev->layout_type);
1971        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1972
1973        p = reserve_space(xdr, 4 + 4);
1974        *p++ = cpu_to_be32(1);                  /* bitmap length */
1975        *p++ = cpu_to_be32(args->notify_types);
1976}
1977
1978static void
1979encode_layoutget(struct xdr_stream *xdr,
1980                      const struct nfs4_layoutget_args *args,
1981                      struct compound_hdr *hdr)
1982{
1983        __be32 *p;
1984
1985        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1986        p = reserve_space(xdr, 36);
1987        *p++ = cpu_to_be32(0);     /* Signal layout available */
1988        *p++ = cpu_to_be32(args->type);
1989        *p++ = cpu_to_be32(args->range.iomode);
1990        p = xdr_encode_hyper(p, args->range.offset);
1991        p = xdr_encode_hyper(p, args->range.length);
1992        p = xdr_encode_hyper(p, args->minlength);
1993        encode_nfs4_stateid(xdr, &args->stateid);
1994        encode_uint32(xdr, args->maxcount);
1995
1996        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1997                __func__,
1998                args->type,
1999                args->range.iomode,
2000                (unsigned long)args->range.offset,

2001                (unsigned long)args->range.length,
2002                args->maxcount);
2003}
2004
2005static int
2006encode_layoutcommit(struct xdr_stream *xdr,
2007                    struct inode *inode,
2008                    const struct nfs4_layoutcommit_args *args,
2009                    struct compound_hdr *hdr)
2010{
2011        __be32 *p;
2012
2013        dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2014                NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2015
2016        encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2017        p = reserve_space(xdr, 20);
2018        /* Only whole file layouts */
2019        p = xdr_encode_hyper(p, 0); /* offset */
2020        p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2021        *p = cpu_to_be32(0); /* reclaim */
2022        encode_nfs4_stateid(xdr, &args->stateid);
2023        if (args->lastbytewritten != U64_MAX) {
2024                p = reserve_space(xdr, 20);
2025                *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2026                p = xdr_encode_hyper(p, args->lastbytewritten);
2027        } else {
2028                p = reserve_space(xdr, 12);
2029                *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2030        }
2031        *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2032        *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2033
2034        encode_uint32(xdr, args->layoutupdate_len);
2035        if (args->layoutupdate_pages)
2036                xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2037                                args->layoutupdate_len);
2038
2039        return 0;
2040}
2041
2042static void
2043encode_layoutreturn(struct xdr_stream *xdr,
2044                    const struct nfs4_layoutreturn_args *args,
2045                    struct compound_hdr *hdr)
2046{
2047        __be32 *p;
2048
2049        encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2050        p = reserve_space(xdr, 16);
2051        *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2052        *p++ = cpu_to_be32(args->layout_type);
2053        *p++ = cpu_to_be32(args->range.iomode);
2054        *p = cpu_to_be32(RETURN_FILE);
2055        p = reserve_space(xdr, 16);
2056        p = xdr_encode_hyper(p, args->range.offset);
2057        p = xdr_encode_hyper(p, args->range.length);
2058        spin_lock(&args->inode->i_lock);
2059        encode_nfs4_stateid(xdr, &args->stateid);
2060        spin_unlock(&args->inode->i_lock);
2061        if (args->ld_private->ops && args->ld_private->ops->encode)
2062                args->ld_private->ops->encode(xdr, args, args->ld_private);
2063        else
2064                encode_uint32(xdr, 0);
2065}
2066
2067static int
2068encode_secinfo_no_name(struct xdr_stream *xdr,
2069                       const struct nfs41_secinfo_no_name_args *args,
2070                       struct compound_hdr *hdr)
2071{
2072        encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2073        encode_uint32(xdr, args->style);
2074        return 0;
2075}
2076
2077static void encode_test_stateid(struct xdr_stream *xdr,
2078                                const struct nfs41_test_stateid_args *args,
2079                                struct compound_hdr *hdr)
2080{
2081        encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2082        encode_uint32(xdr, 1);
2083        encode_nfs4_stateid(xdr, args->stateid);
2084}
2085
2086static void encode_free_stateid(struct xdr_stream *xdr,
2087                                const struct nfs41_free_stateid_args *args,
2088                                struct compound_hdr *hdr)
2089{
2090        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2091        encode_nfs4_stateid(xdr, &args->stateid);
2092}
2093#else
2094static inline void
2095encode_layoutreturn(struct xdr_stream *xdr,
2096                    const struct nfs4_layoutreturn_args *args,
2097                    struct compound_hdr *hdr)
2098{
2099}
2100
2101static void
2102encode_layoutget(struct xdr_stream *xdr,
2103                      const struct nfs4_layoutget_args *args,
2104                      struct compound_hdr *hdr)
2105{
2106}
2107#endif /* CONFIG_NFS_V4_1 */
2108
2109/*
2110 * END OF "GENERIC" ENCODE ROUTINES.
2111 */
2112
2113static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2114{
2115#if defined(CONFIG_NFS_V4_1)
2116        struct nfs4_session *session = args->sa_slot->table->session;
2117        if (session)
2118                return session->clp->cl_mvops->minor_version;
2119#endif /* CONFIG_NFS_V4_1 */
2120        return 0;
2121}
2122
2123/*
2124 * Encode an ACCESS request
2125 */
2126static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2127                                const void *data)
2128{
2129        const struct nfs4_accessargs *args = data;
2130        struct compound_hdr hdr = {
2131                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2132        };
2133
2134        encode_compound_hdr(xdr, req, &hdr);
2135        encode_sequence(xdr, &args->seq_args, &hdr);
2136        encode_putfh(xdr, args->fh, &hdr);
2137        encode_access(xdr, args->access, &hdr);
2138        if (args->bitmask)
2139                encode_getfattr(xdr, args->bitmask, &hdr);
2140        encode_nops(&hdr);
2141}
2142
2143/*
2144 * Encode LOOKUP request
2145 */
2146static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2147                                const void *data)
2148{
2149        const struct nfs4_lookup_arg *args = data;
2150        struct compound_hdr hdr = {
2151                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152        };
2153
2154        encode_compound_hdr(xdr, req, &hdr);
2155        encode_sequence(xdr, &args->seq_args, &hdr);
2156        encode_putfh(xdr, args->dir_fh, &hdr);
2157        encode_lookup(xdr, args->name, &hdr);
2158        encode_getfh(xdr, &hdr);
2159        encode_getfattr(xdr, args->bitmask, &hdr);
2160        encode_nops(&hdr);
2161}
2162
2163/*
2164 * Encode LOOKUPP request
2165 */
2166static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                const void *data)
2168{
2169        const struct nfs4_lookupp_arg *args = data;
2170        struct compound_hdr hdr = {
2171                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172        };
2173
2174        encode_compound_hdr(xdr, req, &hdr);
2175        encode_sequence(xdr, &args->seq_args, &hdr);
2176        encode_putfh(xdr, args->fh, &hdr);
2177        encode_lookupp(xdr, &hdr);
2178        encode_getfh(xdr, &hdr);
2179        encode_getfattr(xdr, args->bitmask, &hdr);
2180        encode_nops(&hdr);
2181}
2182
2183/*
2184 * Encode LOOKUP_ROOT request
2185 */
2186static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2187                                     struct xdr_stream *xdr,
2188                                     const void *data)
2189{
2190        const struct nfs4_lookup_root_arg *args = data;
2191        struct compound_hdr hdr = {
2192                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193        };
2194
2195        encode_compound_hdr(xdr, req, &hdr);
2196        encode_sequence(xdr, &args->seq_args, &hdr);
2197        encode_putrootfh(xdr, &hdr);
2198        encode_getfh(xdr, &hdr);
2199        encode_getfattr(xdr, args->bitmask, &hdr);
2200        encode_nops(&hdr);
2201}
2202
2203/*
2204 * Encode REMOVE request
2205 */
2206static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2207                                const void *data)
2208{
2209        const struct nfs_removeargs *args = data;
2210        struct compound_hdr hdr = {
2211                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212        };
2213
2214        encode_compound_hdr(xdr, req, &hdr);
2215        encode_sequence(xdr, &args->seq_args, &hdr);
2216        encode_putfh(xdr, args->fh, &hdr);
2217        encode_remove(xdr, &args->name, &hdr);
2218        encode_nops(&hdr);
2219}
2220
2221/*
2222 * Encode RENAME request
2223 */
2224static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2225                                const void *data)
2226{
2227        const struct nfs_renameargs *args = data;
2228        struct compound_hdr hdr = {
2229                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230        };
2231
2232        encode_compound_hdr(xdr, req, &hdr);
2233        encode_sequence(xdr, &args->seq_args, &hdr);
2234        encode_putfh(xdr, args->old_dir, &hdr);
2235        encode_savefh(xdr, &hdr);
2236        encode_putfh(xdr, args->new_dir, &hdr);
2237        encode_rename(xdr, args->old_name, args->new_name, &hdr);
2238        encode_nops(&hdr);
2239}
2240
2241/*
2242 * Encode LINK request
2243 */
2244static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                              const void *data)
2246{
2247        const struct nfs4_link_arg *args = data;
2248        struct compound_hdr hdr = {
2249                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2250        };
2251
2252        encode_compound_hdr(xdr, req, &hdr);
2253        encode_sequence(xdr, &args->seq_args, &hdr);
2254        encode_putfh(xdr, args->fh, &hdr);
2255        encode_savefh(xdr, &hdr);
2256        encode_putfh(xdr, args->dir_fh, &hdr);
2257        encode_link(xdr, args->name, &hdr);
2258        encode_restorefh(xdr, &hdr);
2259        encode_getfattr(xdr, args->bitmask, &hdr);
2260        encode_nops(&hdr);
2261}
2262
2263/*
2264 * Encode CREATE request
2265 */
2266static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2267                                const void *data)
2268{
2269        const struct nfs4_create_arg *args = data;
2270        struct compound_hdr hdr = {
2271                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272        };
2273
2274        encode_compound_hdr(xdr, req, &hdr);
2275        encode_sequence(xdr, &args->seq_args, &hdr);
2276        encode_putfh(xdr, args->dir_fh, &hdr);
2277        encode_create(xdr, args, &hdr);
2278        encode_getfh(xdr, &hdr);
2279        encode_getfattr(xdr, args->bitmask, &hdr);
2280        encode_nops(&hdr);
2281}
2282
2283/*
2284 * Encode SYMLINK request
2285 */
2286static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                                 const void *data)
2288{
2289        const struct nfs4_create_arg *args = data;
2290
2291        nfs4_xdr_enc_create(req, xdr, args);
2292}
2293
2294/*
2295 * Encode GETATTR request
2296 */
2297static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2298                                 const void *data)
2299{
2300        const struct nfs4_getattr_arg *args = data;
2301        struct compound_hdr hdr = {
2302                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303        };
2304
2305        encode_compound_hdr(xdr, req, &hdr);
2306        encode_sequence(xdr, &args->seq_args, &hdr);
2307        encode_putfh(xdr, args->fh, &hdr);
2308        encode_getfattr(xdr, args->bitmask, &hdr);
2309        encode_nops(&hdr);
2310}
2311
2312/*
2313 * Encode a CLOSE request
2314 */
2315static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2316                               const void *data)
2317{
2318        const struct nfs_closeargs *args = data;
2319        struct compound_hdr hdr = {
2320                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321        };
2322
2323        encode_compound_hdr(xdr, req, &hdr);
2324        encode_sequence(xdr, &args->seq_args, &hdr);
2325        encode_putfh(xdr, args->fh, &hdr);
2326        if (args->lr_args)
2327                encode_layoutreturn(xdr, args->lr_args, &hdr);
2328        if (args->bitmask != NULL)
2329                encode_getfattr(xdr, args->bitmask, &hdr);
2330        encode_close(xdr, args, &hdr);
2331        encode_nops(&hdr);
2332}
2333
2334/*
2335 * Encode an OPEN request
2336 */
2337static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2338                              const void *data)
2339{
2340        const struct nfs_openargs *args = data;
2341        struct compound_hdr hdr = {
2342                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343        };
2344
2345        encode_compound_hdr(xdr, req, &hdr);
2346        encode_sequence(xdr, &args->seq_args, &hdr);
2347        encode_putfh(xdr, args->fh, &hdr);
2348        encode_open(xdr, args, &hdr);
2349        encode_getfh(xdr, &hdr);
2350        if (args->access)
2351                encode_access(xdr, args->access, &hdr);
2352        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2353        if (args->lg_args) {
2354                encode_layoutget(xdr, args->lg_args, &hdr);
2355                rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2356                                        args->lg_args->layout.pglen,
2357                                        hdr.replen - pagepad_maxsz);
2358        }
2359        encode_nops(&hdr);
2360}
2361
2362/*
2363 * Encode an OPEN_CONFIRM request
2364 */
2365static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2366                                      struct xdr_stream *xdr,
2367                                      const void *data)
2368{
2369        const struct nfs_open_confirmargs *args = data;
2370        struct compound_hdr hdr = {
2371                .nops   = 0,
2372        };
2373
2374        encode_compound_hdr(xdr, req, &hdr);
2375        encode_putfh(xdr, args->fh, &hdr);
2376        encode_open_confirm(xdr, args, &hdr);
2377        encode_nops(&hdr);
2378}
2379
2380/*
2381 * Encode an OPEN request with no attributes.
2382 */
2383static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2384                                     struct xdr_stream *xdr,
2385                                     const void *data)
2386{
2387        const struct nfs_openargs *args = data;
2388        struct compound_hdr hdr = {
2389                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2390        };
2391
2392        encode_compound_hdr(xdr, req, &hdr);
2393        encode_sequence(xdr, &args->seq_args, &hdr);
2394        encode_putfh(xdr, args->fh, &hdr);
2395        encode_open(xdr, args, &hdr);
2396        if (args->access)
2397                encode_access(xdr, args->access, &hdr);
2398        encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2399        if (args->lg_args) {
2400                encode_layoutget(xdr, args->lg_args, &hdr);
2401                rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2402                                        args->lg_args->layout.pglen,
2403                                        hdr.replen - pagepad_maxsz);
2404        }
2405        encode_nops(&hdr);
2406}
2407
2408/*
2409 * Encode an OPEN_DOWNGRADE request
2410 */
2411static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2412                                        struct xdr_stream *xdr,
2413                                        const void *data)
2414{
2415        const struct nfs_closeargs *args = data;
2416        struct compound_hdr hdr = {
2417                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418        };
2419
2420        encode_compound_hdr(xdr, req, &hdr);
2421        encode_sequence(xdr, &args->seq_args, &hdr);
2422        encode_putfh(xdr, args->fh, &hdr);
2423        if (args->lr_args)
2424                encode_layoutreturn(xdr, args->lr_args, &hdr);
2425        encode_open_downgrade(xdr, args, &hdr);
2426        encode_nops(&hdr);
2427}
2428
2429/*
2430 * Encode a LOCK request
2431 */
2432static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2433                              const void *data)
2434{
2435        const struct nfs_lock_args *args = data;
2436        struct compound_hdr hdr = {
2437                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438        };
2439
2440        encode_compound_hdr(xdr, req, &hdr);
2441        encode_sequence(xdr, &args->seq_args, &hdr);
2442        encode_putfh(xdr, args->fh, &hdr);
2443        encode_lock(xdr, args, &hdr);
2444        encode_nops(&hdr);
2445}
2446
2447/*
2448 * Encode a LOCKT request
2449 */
2450static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                               const void *data)
2452{
2453        const struct nfs_lockt_args *args = data;
2454        struct compound_hdr hdr = {
2455                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2456        };
2457
2458        encode_compound_hdr(xdr, req, &hdr);
2459        encode_sequence(xdr, &args->seq_args, &hdr);
2460        encode_putfh(xdr, args->fh, &hdr);
2461        encode_lockt(xdr, args, &hdr);
2462        encode_nops(&hdr);
2463}
2464
2465/*
2466 * Encode a LOCKU request
2467 */
2468static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2469                               const void *data)
2470{
2471        const struct nfs_locku_args *args = data;
2472        struct compound_hdr hdr = {
2473                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2474        };
2475
2476        encode_compound_hdr(xdr, req, &hdr);
2477        encode_sequence(xdr, &args->seq_args, &hdr);
2478        encode_putfh(xdr, args->fh, &hdr);
2479        encode_locku(xdr, args, &hdr);
2480        encode_nops(&hdr);
2481}
2482
2483static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2484                                           struct xdr_stream *xdr,
2485                                           const void *data)
2486{
2487        const struct nfs_release_lockowner_args *args = data;
2488        struct compound_hdr hdr = {
2489                .minorversion = 0,
2490        };
2491
2492        encode_compound_hdr(xdr, req, &hdr);
2493        encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2494        encode_nops(&hdr);
2495}
2496
2497/*
2498 * Encode a READLINK request
2499 */
2500static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2501                                  const void *data)
2502{
2503        const struct nfs4_readlink *args = data;
2504        struct compound_hdr hdr = {
2505                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506        };
2507
2508        encode_compound_hdr(xdr, req, &hdr);
2509        encode_sequence(xdr, &args->seq_args, &hdr);
2510        encode_putfh(xdr, args->fh, &hdr);
2511        encode_readlink(xdr, args, req, &hdr);
2512
2513        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2514                                args->pglen, hdr.replen - pagepad_maxsz);
2515        encode_nops(&hdr);
2516}
2517
2518/*
2519 * Encode a READDIR request
2520 */
2521static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                 const void *data)
2523{
2524        const struct nfs4_readdir_arg *args = data;
2525        struct compound_hdr hdr = {
2526                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527        };
2528
2529        encode_compound_hdr(xdr, req, &hdr);
2530        encode_sequence(xdr, &args->seq_args, &hdr);
2531        encode_putfh(xdr, args->fh, &hdr);
2532        encode_readdir(xdr, args, req, &hdr);
2533
2534        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2535                                args->count, hdr.replen - pagepad_maxsz);
2536        encode_nops(&hdr);
2537}
2538
2539/*
2540 * Encode a READ request
2541 */
2542static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2543                              const void *data)
2544{
2545        const struct nfs_pgio_args *args = data;
2546        struct compound_hdr hdr = {
2547                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2548        };
2549
2550        encode_compound_hdr(xdr, req, &hdr);
2551        encode_sequence(xdr, &args->seq_args, &hdr);
2552        encode_putfh(xdr, args->fh, &hdr);
2553        encode_read(xdr, args, &hdr);
2554
2555        rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2556                                args->count, hdr.replen - pagepad_maxsz);
2557        req->rq_rcv_buf.flags |= XDRBUF_READ;
2558        encode_nops(&hdr);
2559}
2560
2561/*
2562 * Encode an SETATTR request
2563 */
2564static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2565                                 const void *data)
2566{
2567        const struct nfs_setattrargs *args = data;
2568        struct compound_hdr hdr = {
2569                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2570        };
2571
2572        encode_compound_hdr(xdr, req, &hdr);
2573        encode_sequence(xdr, &args->seq_args, &hdr);
2574        encode_putfh(xdr, args->fh, &hdr);
2575        encode_setattr(xdr, args, args->server, &hdr);
2576        encode_getfattr(xdr, args->bitmask, &hdr);
2577        encode_nops(&hdr);
2578}
2579
2580/*
2581 * Encode a GETACL request
2582 */
2583static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2584                                const void *data)
2585{
2586        const struct nfs_getaclargs *args = data;
2587        struct compound_hdr hdr = {
2588                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2589        };
2590        const __u32 nfs4_acl_bitmap[1] = {
2591                [0] = FATTR4_WORD0_ACL,
2592        };
2593        uint32_t replen;
2594
2595        encode_compound_hdr(xdr, req, &hdr);
2596        encode_sequence(xdr, &args->seq_args, &hdr);
2597        encode_putfh(xdr, args->fh, &hdr);
2598        replen = hdr.replen + op_decode_hdr_maxsz;
2599        encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2600                        ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2601
2602        rpc_prepare_reply_pages(req, args->acl_pages, 0,
2603                                args->acl_len, replen);
2604        encode_nops(&hdr);
2605}
2606
2607/*
2608 * Encode a WRITE request
2609 */
2610static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2611                               const void *data)
2612{
2613        const struct nfs_pgio_args *args = data;
2614        struct compound_hdr hdr = {
2615                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616        };
2617
2618        encode_compound_hdr(xdr, req, &hdr);
2619        encode_sequence(xdr, &args->seq_args, &hdr);
2620        encode_putfh(xdr, args->fh, &hdr);
2621        encode_write(xdr, args, &hdr);
2622        req->rq_snd_buf.flags |= XDRBUF_WRITE;
2623        if (args->bitmask)
2624                encode_getfattr(xdr, args->bitmask, &hdr);
2625        encode_nops(&hdr);
2626}
2627
2628/*
2629 *  a COMMIT request
2630 */
2631static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2632                                const void *data)
2633{
2634        const struct nfs_commitargs *args = data;
2635        struct compound_hdr hdr = {
2636                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2637        };
2638
2639        encode_compound_hdr(xdr, req, &hdr);
2640        encode_sequence(xdr, &args->seq_args, &hdr);
2641        encode_putfh(xdr, args->fh, &hdr);
2642        encode_commit(xdr, args, &hdr);
2643        encode_nops(&hdr);
2644}
2645
2646/*
2647 * FSINFO request
2648 */
2649static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2650                                const void *data)
2651{
2652        const struct nfs4_fsinfo_arg *args = data;
2653        struct compound_hdr hdr = {
2654                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2655        };
2656
2657        encode_compound_hdr(xdr, req, &hdr);
2658        encode_sequence(xdr, &args->seq_args, &hdr);
2659        encode_putfh(xdr, args->fh, &hdr);
2660        encode_fsinfo(xdr, args->bitmask, &hdr);
2661        encode_nops(&hdr);
2662}
2663
2664/*
2665 * a PATHCONF request
2666 */
2667static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2668                                  const void *data)
2669{
2670        const struct nfs4_pathconf_arg *args = data;
2671        struct compound_hdr hdr = {
2672                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2673        };
2674
2675        encode_compound_hdr(xdr, req, &hdr);
2676        encode_sequence(xdr, &args->seq_args, &hdr);
2677        encode_putfh(xdr, args->fh, &hdr);
2678        encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2679                        ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2680        encode_nops(&hdr);
2681}
2682
2683/*
2684 * a STATFS request
2685 */
2686static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2687                                const void *data)
2688{
2689        const struct nfs4_statfs_arg *args = data;
2690        struct compound_hdr hdr = {
2691                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2692        };
2693
2694        encode_compound_hdr(xdr, req, &hdr);
2695        encode_sequence(xdr, &args->seq_args, &hdr);
2696        encode_putfh(xdr, args->fh, &hdr);
2697        encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2698                        ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2699        encode_nops(&hdr);
2700}
2701
2702/*
2703 * GETATTR_BITMAP request
2704 */
2705static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2706                                     struct xdr_stream *xdr,
2707                                     const void *data)
2708{
2709        const struct nfs4_server_caps_arg *args = data;
2710        const u32 *bitmask = args->bitmask;
2711        struct compound_hdr hdr = {
2712                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713        };
2714
2715        encode_compound_hdr(xdr, req, &hdr);
2716        encode_sequence(xdr, &args->seq_args, &hdr);
2717        encode_putfh(xdr, args->fhandle, &hdr);
2718        encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2719        encode_nops(&hdr);
2720}
2721
2722/*
2723 * a RENEW request
2724 */
2725static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2726                               const void *data)
2727
2728{
2729        const struct nfs_client *clp = data;
2730        struct compound_hdr hdr = {
2731                .nops   = 0,
2732        };
2733
2734        encode_compound_hdr(xdr, req, &hdr);
2735        encode_renew(xdr, clp->cl_clientid, &hdr);
2736        encode_nops(&hdr);
2737}
2738
2739/*
2740 * a SETCLIENTID request
2741 */
2742static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2743                                     struct xdr_stream *xdr,
2744                                     const void *data)
2745{
2746        const struct nfs4_setclientid *sc = data;
2747        struct compound_hdr hdr = {
2748                .nops   = 0,
2749        };
2750
2751        encode_compound_hdr(xdr, req, &hdr);
2752        encode_setclientid(xdr, sc, &hdr);
2753        encode_nops(&hdr);
2754}
2755
2756/*
2757 * a SETCLIENTID_CONFIRM request
2758 */
2759static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2760                                             struct xdr_stream *xdr,
2761                                             const void *data)
2762{
2763        const struct nfs4_setclientid_res *arg = data;
2764        struct compound_hdr hdr = {
2765                .nops   = 0,
2766        };
2767
2768        encode_compound_hdr(xdr, req, &hdr);
2769        encode_setclientid_confirm(xdr, arg, &hdr);
2770        encode_nops(&hdr);
2771}
2772
2773/*
2774 * DELEGRETURN request
2775 */
2776static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2777                                     struct xdr_stream *xdr,
2778                                     const void *data)
2779{
2780        const struct nfs4_delegreturnargs *args = data;
2781        struct compound_hdr hdr = {
2782                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2783        };
2784
2785        encode_compound_hdr(xdr, req, &hdr);
2786        encode_sequence(xdr, &args->seq_args, &hdr);
2787        encode_putfh(xdr, args->fhandle, &hdr);
2788        if (args->lr_args)
2789                encode_layoutreturn(xdr, args->lr_args, &hdr);
2790        if (args->bitmask)
2791                encode_getfattr(xdr, args->bitmask, &hdr);
2792        encode_delegreturn(xdr, args->stateid, &hdr);
2793        encode_nops(&hdr);
2794}
2795
2796/*
2797 * Encode FS_LOCATIONS request
2798 */
2799static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2800                                      struct xdr_stream *xdr,
2801                                      const void *data)
2802{
2803        const struct nfs4_fs_locations_arg *args = data;
2804        struct compound_hdr hdr = {
2805                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2806        };
2807        uint32_t replen;
2808
2809        encode_compound_hdr(xdr, req, &hdr);
2810        encode_sequence(xdr, &args->seq_args, &hdr);
2811        if (args->migration) {
2812                encode_putfh(xdr, args->fh, &hdr);
2813                replen = hdr.replen;
2814                encode_fs_locations(xdr, args->bitmask, &hdr);
2815                if (args->renew)
2816                        encode_renew(xdr, args->clientid, &hdr);
2817        } else {
2818                encode_putfh(xdr, args->dir_fh, &hdr);
2819                encode_lookup(xdr, args->name, &hdr);
2820                replen = hdr.replen;
2821                encode_fs_locations(xdr, args->bitmask, &hdr);
2822        }
2823
2824        rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2825                                PAGE_SIZE, replen);
2826        encode_nops(&hdr);
2827}
2828
2829/*
2830 * Encode SECINFO request
2831 */
2832static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2833                                struct xdr_stream *xdr,
2834                                const void *data)
2835{
2836        const struct nfs4_secinfo_arg *args = data;
2837        struct compound_hdr hdr = {
2838                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2839        };
2840
2841        encode_compound_hdr(xdr, req, &hdr);
2842        encode_sequence(xdr, &args->seq_args, &hdr);
2843        encode_putfh(xdr, args->dir_fh, &hdr);
2844        encode_secinfo(xdr, args->name, &hdr);
2845        encode_nops(&hdr);
2846}
2847
2848/*
2849 * Encode FSID_PRESENT request
2850 */
2851static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2852                                      struct xdr_stream *xdr,
2853                                      const void *data)
2854{
2855        const struct nfs4_fsid_present_arg *args = data;
2856        struct compound_hdr hdr = {
2857                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2858        };
2859
2860        encode_compound_hdr(xdr, req, &hdr);
2861        encode_sequence(xdr, &args->seq_args, &hdr);
2862        encode_putfh(xdr, args->fh, &hdr);
2863        encode_getfh(xdr, &hdr);
2864        if (args->renew)
2865                encode_renew(xdr, args->clientid, &hdr);
2866        encode_nops(&hdr);
2867}
2868
2869#if defined(CONFIG_NFS_V4_1)
2870/*
2871 * BIND_CONN_TO_SESSION request
2872 */
2873static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2874                                struct xdr_stream *xdr,
2875                                const void *data)
2876{
2877        const struct nfs41_bind_conn_to_session_args *args = data;
2878        struct compound_hdr hdr = {
2879                .minorversion = args->client->cl_mvops->minor_version,
2880        };
2881
2882        encode_compound_hdr(xdr, req, &hdr);
2883        encode_bind_conn_to_session(xdr, args, &hdr);
2884        encode_nops(&hdr);
2885}
2886
2887/*
2888 * EXCHANGE_ID request
2889 */
2890static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2891                                     struct xdr_stream *xdr,
2892                                     const void *data)
2893{
2894        const struct nfs41_exchange_id_args *args = data;
2895        struct compound_hdr hdr = {
2896                .minorversion = args->client->cl_mvops->minor_version,
2897        };
2898
2899        encode_compound_hdr(xdr, req, &hdr);
2900        encode_exchange_id(xdr, args, &hdr);
2901        encode_nops(&hdr);
2902}
2903
2904/*
2905 * a CREATE_SESSION request
2906 */
2907static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2908                                        struct xdr_stream *xdr,
2909                                        const void *data)
2910{
2911        const struct nfs41_create_session_args *args = data;
2912        struct compound_hdr hdr = {
2913                .minorversion = args->client->cl_mvops->minor_version,
2914        };
2915
2916        encode_compound_hdr(xdr, req, &hdr);
2917        encode_create_session(xdr, args, &hdr);
2918        encode_nops(&hdr);
2919}
2920
2921/*
2922 * a DESTROY_SESSION request
2923 */
2924static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2925                                         struct xdr_stream *xdr,
2926                                         const void *data)
2927{
2928        const struct nfs4_session *session = data;
2929        struct compound_hdr hdr = {
2930                .minorversion = session->clp->cl_mvops->minor_version,
2931        };
2932
2933        encode_compound_hdr(xdr, req, &hdr);
2934        encode_destroy_session(xdr, session, &hdr);
2935        encode_nops(&hdr);
2936}
2937
2938/*
2939 * a DESTROY_CLIENTID request
2940 */
2941static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2942                                         struct xdr_stream *xdr,
2943                                         const void *data)
2944{
2945        const struct nfs_client *clp = data;
2946        struct compound_hdr hdr = {
2947                .minorversion = clp->cl_mvops->minor_version,
2948        };
2949
2950        encode_compound_hdr(xdr, req, &hdr);
2951        encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2952        encode_nops(&hdr);
2953}
2954
2955/*
2956 * a SEQUENCE request
2957 */
2958static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2959                                  const void *data)
2960{
2961        const struct nfs4_sequence_args *args = data;
2962        struct compound_hdr hdr = {
2963                .minorversion = nfs4_xdr_minorversion(args),
2964        };
2965
2966        encode_compound_hdr(xdr, req, &hdr);
2967        encode_sequence(xdr, args, &hdr);
2968        encode_nops(&hdr);
2969}
2970
2971#endif
2972
2973/*
2974 * a GET_LEASE_TIME request
2975 */
2976static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2977                                        struct xdr_stream *xdr,
2978                                        const void *data)
2979{
2980        const struct nfs4_get_lease_time_args *args = data;
2981        struct compound_hdr hdr = {
2982                .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2983        };
2984        const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2985
2986        encode_compound_hdr(xdr, req, &hdr);
2987        encode_sequence(xdr, &args->la_seq_args, &hdr);
2988        encode_putrootfh(xdr, &hdr);
2989        encode_fsinfo(xdr, lease_bitmap, &hdr);
2990        encode_nops(&hdr);
2991}
2992
2993#ifdef CONFIG_NFS_V4_1
2994
2995/*
2996 * a RECLAIM_COMPLETE request
2997 */
2998static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2999                                          struct xdr_stream *xdr,
3000                                          const void *data)

3001{
3002        const struct nfs41_reclaim_complete_args *args = data;
3003        struct compound_hdr hdr = {
3004                .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3005        };
3006
3007        encode_compound_hdr(xdr, req, &hdr);
3008        encode_sequence(xdr, &args->seq_args, &hdr);
3009        encode_reclaim_complete(xdr, args, &hdr);
3010        encode_nops(&hdr);
3011}
3012
3013/*
3014 * Encode GETDEVICEINFO request
3015 */
3016static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3017                                       struct xdr_stream *xdr,
3018                                       const void *data)
3019{
3020        const struct nfs4_getdeviceinfo_args *args = data;
3021        struct compound_hdr hdr = {
3022                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3023        };
3024        uint32_t replen;
3025
3026        encode_compound_hdr(xdr, req, &hdr);
3027        encode_sequence(xdr, &args->seq_args, &hdr);
3028
3029        replen = hdr.replen + op_decode_hdr_maxsz + 2;
3030
3031        encode_getdeviceinfo(xdr, args, &hdr);
3032
3033        /* set up reply kvec. device_addr4 opaque data is read into the
3034         * pages */
3035        rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3036                                args->pdev->pglen, replen);
3037        encode_nops(&hdr);
3038}
3039
3040/*
3041 *  Encode LAYOUTGET request
3042 */
3043static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3044                                   struct xdr_stream *xdr,
3045                                   const void *data)
3046{
3047        const struct nfs4_layoutget_args *args = data;
3048        struct compound_hdr hdr = {
3049                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3050        };
3051
3052        encode_compound_hdr(xdr, req, &hdr);
3053        encode_sequence(xdr, &args->seq_args, &hdr);
3054        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3055        encode_layoutget(xdr, args, &hdr);
3056
3057        rpc_prepare_reply_pages(req, args->layout.pages, 0,
3058                                args->layout.pglen, hdr.replen - pagepad_maxsz);
3059        encode_nops(&hdr);
3060}
3061
3062/*
3063 *  Encode LAYOUTCOMMIT request
3064 */
3065static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3066                                      struct xdr_stream *xdr,
3067                                      const void *priv)
3068{
3069        const struct nfs4_layoutcommit_args *args = priv;
3070        struct nfs4_layoutcommit_data *data =
3071                container_of(args, struct nfs4_layoutcommit_data, args);
3072        struct compound_hdr hdr = {
3073                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3074        };
3075
3076        encode_compound_hdr(xdr, req, &hdr);
3077        encode_sequence(xdr, &args->seq_args, &hdr);
3078        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3079        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3080        encode_getfattr(xdr, args->bitmask, &hdr);
3081        encode_nops(&hdr);
3082}
3083
3084/*
3085 * Encode LAYOUTRETURN request
3086 */
3087static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3088                                      struct xdr_stream *xdr,
3089                                      const void *data)
3090{
3091        const struct nfs4_layoutreturn_args *args = data;
3092        struct compound_hdr hdr = {
3093                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3094        };
3095
3096        encode_compound_hdr(xdr, req, &hdr);
3097        encode_sequence(xdr, &args->seq_args, &hdr);
3098        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3099        encode_layoutreturn(xdr, args, &hdr);
3100        encode_nops(&hdr);
3101}
3102
3103/*
3104 * Encode SECINFO_NO_NAME request
3105 */
3106static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3107                                        struct xdr_stream *xdr,
3108                                        const void *data)
3109{
3110        const struct nfs41_secinfo_no_name_args *args = data;
3111        struct compound_hdr hdr = {
3112                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3113        };
3114
3115        encode_compound_hdr(xdr, req, &hdr);
3116        encode_sequence(xdr, &args->seq_args, &hdr);
3117        encode_putrootfh(xdr, &hdr);
3118        encode_secinfo_no_name(xdr, args, &hdr);
3119        encode_nops(&hdr);
3120}
3121
3122/*
3123 *  Encode TEST_STATEID request
3124 */
3125static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3126                                      struct xdr_stream *xdr,
3127                                      const void *data)
3128{
3129        const struct nfs41_test_stateid_args *args = data;
3130        struct compound_hdr hdr = {
3131                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3132        };
3133
3134        encode_compound_hdr(xdr, req, &hdr);
3135        encode_sequence(xdr, &args->seq_args, &hdr);
3136        encode_test_stateid(xdr, args, &hdr);
3137        encode_nops(&hdr);
3138}
3139
3140/*
3141 *  Encode FREE_STATEID request
3142 */
3143static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3144                                     struct xdr_stream *xdr,
3145                                     const void *data)
3146{
3147        const struct nfs41_free_stateid_args *args = data;
3148        struct compound_hdr hdr = {
3149                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3150        };
3151
3152        encode_compound_hdr(xdr, req, &hdr);
3153        encode_sequence(xdr, &args->seq_args, &hdr);
3154        encode_free_stateid(xdr, args, &hdr);
3155        encode_nops(&hdr);
3156}
3157#endif /* CONFIG_NFS_V4_1 */
3158
3159static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3160{
3161        ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3162                        NFS4_OPAQUE_LIMIT);
3163        if (unlikely(ret < 0))
3164                return -EIO;
3165        *len = ret;
3166        return 0;
3167}
3168
3169static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3170{
3171        __be32 *p;
3172
3173        p = xdr_inline_decode(xdr, 8);
3174        if (unlikely(!p))
3175                return -EIO;
3176        hdr->status = be32_to_cpup(p++);
3177        hdr->taglen = be32_to_cpup(p);
3178
3179        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3180        if (unlikely(!p))
3181                return -EIO;
3182        hdr->tag = (char *)p;
3183        p += XDR_QUADLEN(hdr->taglen);
3184        hdr->nops = be32_to_cpup(p);
3185        if (unlikely(hdr->nops < 1))
3186                return nfs4_stat_to_errno(hdr->status);
3187        return 0;
3188}
3189
3190static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3191                int *nfs_retval)
3192{
3193        __be32 *p;
3194        uint32_t opnum;
3195        int32_t nfserr;
3196
3197        p = xdr_inline_decode(xdr, 8);
3198        if (unlikely(!p))
3199                goto out_overflow;
3200        opnum = be32_to_cpup(p++);
3201        if (unlikely(opnum != expected))
3202                goto out_bad_operation;
3203        if (unlikely(*p != cpu_to_be32(NFS_OK)))
3204                goto out_status;
3205        *nfs_retval = 0;
3206        return true;
3207out_status:
3208        nfserr = be32_to_cpup(p);
3209        trace_nfs4_xdr_status(xdr, opnum, nfserr);
3210        *nfs_retval = nfs4_stat_to_errno(nfserr);
3211        return true;
3212out_bad_operation:
3213        trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3214        *nfs_retval = -EREMOTEIO;
3215        return false;
3216out_overflow:
3217        *nfs_retval = -EIO;
3218        return false;
3219}
3220
3221static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3222{
3223        int retval;
3224
3225        __decode_op_hdr(xdr, expected, &retval);
3226        return retval;
3227}
3228
3229/* Dummy routine */
3230static int decode_ace(struct xdr_stream *xdr, void *ace)
3231{
3232        __be32 *p;
3233        unsigned int strlen;
3234        char *str;
3235
3236        p = xdr_inline_decode(xdr, 12);
3237        if (unlikely(!p))
3238                return -EIO;
3239        return decode_opaque_inline(xdr, &strlen, &str);
3240}
3241
3242static ssize_t
3243decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3244{
3245        ssize_t ret;
3246
3247        ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3248        if (likely(ret >= 0))
3249                return ret;
3250        if (ret != -EMSGSIZE)
3251                return -EIO;
3252        return sz;
3253}
3254
3255static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3256{
3257        ssize_t ret;
3258        ret = decode_bitmap4(xdr, bitmap, 3);
3259        return ret < 0 ? ret : 0;
3260}
3261
3262static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3263{
3264        __be32 *p;
3265
3266        p = xdr_inline_decode(xdr, 4);
3267        if (unlikely(!p))
3268                return -EIO;
3269        *attrlen = be32_to_cpup(p);
3270        *savep = xdr_stream_pos(xdr);
3271        return 0;
3272}
3273
3274static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3275{
3276        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3277                int ret;
3278                ret = decode_attr_bitmap(xdr, bitmask);
3279                if (unlikely(ret < 0))
3280                        return ret;
3281                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3282        } else
3283                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3284        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3285                bitmask[0], bitmask[1], bitmask[2]);
3286        return 0;
3287}
3288
3289static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3290{
3291        __be32 *p;
3292        int ret = 0;
3293
3294        *type = 0;
3295        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3296                return -EIO;
3297        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3298                p = xdr_inline_decode(xdr, 4);
3299                if (unlikely(!p))
3300                        return -EIO;
3301                *type = be32_to_cpup(p);
3302                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3303                        dprintk("%s: bad type %d\n", __func__, *type);
3304                        return -EIO;
3305                }
3306                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3307                ret = NFS_ATTR_FATTR_TYPE;
3308        }
3309        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3310        return ret;
3311}
3312
3313static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3314                                      uint32_t *bitmap, uint32_t *type)
3315{
3316        __be32 *p;
3317
3318        *type = 0;
3319        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3320                return -EIO;
3321        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3322                p = xdr_inline_decode(xdr, 4);
3323                if (unlikely(!p))
3324                        return -EIO;
3325                *type = be32_to_cpup(p);
3326                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3327        }
3328        dprintk("%s: expire type=0x%x\n", __func__, *type);
3329        return 0;
3330}
3331
3332static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3333{
3334        __be32 *p;
3335        int ret = 0;
3336
3337        *change = 0;
3338        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3339                return -EIO;
3340        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3341                p = xdr_inline_decode(xdr, 8);
3342                if (unlikely(!p))
3343                        return -EIO;
3344                xdr_decode_hyper(p, change);
3345                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3346                ret = NFS_ATTR_FATTR_CHANGE;
3347        }
3348        dprintk("%s: change attribute=%Lu\n", __func__,
3349                        (unsigned long long)*change);
3350        return ret;
3351}
3352
3353static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3354{
3355        __be32 *p;
3356        int ret = 0;
3357
3358        *size = 0;
3359        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3360                return -EIO;
3361        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3362                p = xdr_inline_decode(xdr, 8);
3363                if (unlikely(!p))
3364                        return -EIO;
3365                xdr_decode_hyper(p, size);
3366                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3367                ret = NFS_ATTR_FATTR_SIZE;
3368        }
3369        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3370        return ret;
3371}
3372
3373static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3374{
3375        __be32 *p;
3376
3377        *res = 0;
3378        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3379                return -EIO;
3380        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3381                p = xdr_inline_decode(xdr, 4);
3382                if (unlikely(!p))
3383                        return -EIO;
3384                *res = be32_to_cpup(p);
3385                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3386        }
3387        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3388        return 0;
3389}
3390
3391static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392{
3393        __be32 *p;
3394
3395        *res = 0;
3396        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3397                return -EIO;
3398        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3399                p = xdr_inline_decode(xdr, 4);
3400                if (unlikely(!p))
3401                        return -EIO;
3402                *res = be32_to_cpup(p);
3403                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3404        }
3405        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3406        return 0;
3407}
3408
3409static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3410{
3411        __be32 *p;
3412        int ret = 0;
3413
3414        fsid->major = 0;
3415        fsid->minor = 0;
3416        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3417                return -EIO;
3418        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3419                p = xdr_inline_decode(xdr, 16);
3420                if (unlikely(!p))
3421                        return -EIO;
3422                p = xdr_decode_hyper(p, &fsid->major);
3423                xdr_decode_hyper(p, &fsid->minor);
3424                bitmap[0] &= ~FATTR4_WORD0_FSID;
3425                ret = NFS_ATTR_FATTR_FSID;
3426        }
3427        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3428                        (unsigned long long)fsid->major,
3429                        (unsigned long long)fsid->minor);
3430        return ret;
3431}
3432
3433static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3434{
3435        __be32 *p;
3436
3437        *res = 60;
3438        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3439                return -EIO;
3440        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3441                p = xdr_inline_decode(xdr, 4);
3442                if (unlikely(!p))
3443                        return -EIO;
3444                *res = be32_to_cpup(p);
3445                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3446        }
3447        dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3448        return 0;
3449}
3450
3451static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3452{
3453        __be32 *p;
3454
3455        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3456                return -EIO;
3457        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3458                p = xdr_inline_decode(xdr, 4);
3459                if (unlikely(!p))
3460                        return -EIO;
3461                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3462                *res = -be32_to_cpup(p);
3463        }
3464        return 0;
3465}
3466
3467static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3468                                 uint32_t *bitmap, uint32_t *bitmask)
3469{
3470        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3471                int ret;
3472                ret = decode_attr_bitmap(xdr, bitmask);
3473                if (unlikely(ret < 0))
3474                        return ret;
3475                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3476        } else
3477                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3478        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3479                bitmask[0], bitmask[1], bitmask[2]);
3480        return 0;
3481}
3482
3483static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3484{
3485        __be32 *p;
3486        u32 len;
3487
3488        if (fh != NULL)
3489                memset(fh, 0, sizeof(*fh));
3490
3491        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3492                return -EIO;
3493        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3494                p = xdr_inline_decode(xdr, 4);
3495                if (unlikely(!p))
3496                        return -EIO;
3497                len = be32_to_cpup(p);
3498                if (len > NFS4_FHSIZE || len == 0) {
3499                        trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3500                                                      NFS4ERR_BADHANDLE);
3501                        return -EREMOTEIO;
3502                }
3503                p = xdr_inline_decode(xdr, len);
3504                if (unlikely(!p))
3505                        return -EIO;
3506                if (fh != NULL) {
3507                        memcpy(fh->data, p, len);
3508                        fh->size = len;
3509                }
3510                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3511        }
3512        return 0;
3513}
3514
3515static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3516{
3517        __be32 *p;
3518
3519        *res = 0;
3520        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3521                return -EIO;
3522        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3523                p = xdr_inline_decode(xdr, 4);
3524                if (unlikely(!p))
3525                        return -EIO;
3526                *res = be32_to_cpup(p);
3527                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3528        }
3529        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3530        return 0;
3531}
3532
3533static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3534{
3535        __be32 *p;
3536        int ret = 0;
3537
3538        *fileid = 0;
3539        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3540                return -EIO;
3541        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3542                p = xdr_inline_decode(xdr, 8);
3543                if (unlikely(!p))
3544                        return -EIO;
3545                xdr_decode_hyper(p, fileid);
3546                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3547                ret = NFS_ATTR_FATTR_FILEID;
3548        }
3549        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3550        return ret;
3551}
3552
3553static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554{
3555        __be32 *p;
3556        int ret = 0;
3557
3558        *fileid = 0;
3559        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3560                return -EIO;
3561        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3562                p = xdr_inline_decode(xdr, 8);
3563                if (unlikely(!p))
3564                        return -EIO;
3565                xdr_decode_hyper(p, fileid);
3566                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3567                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3568        }
3569        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570        return ret;
3571}
3572
3573static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3574{
3575        __be32 *p;
3576        int status = 0;
3577
3578        *res = 0;
3579        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3580                return -EIO;
3581        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3582                p = xdr_inline_decode(xdr, 8);
3583                if (unlikely(!p))
3584                        return -EIO;
3585                xdr_decode_hyper(p, res);
3586                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3587        }
3588        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3589        return status;
3590}
3591
3592static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3593{
3594        __be32 *p;
3595        int status = 0;
3596
3597        *res = 0;
3598        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3599                return -EIO;
3600        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3601                p = xdr_inline_decode(xdr, 8);
3602                if (unlikely(!p))
3603                        return -EIO;
3604                xdr_decode_hyper(p, res);
3605                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3606        }
3607        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3608        return status;
3609}
3610
3611static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3612{
3613        __be32 *p;
3614        int status = 0;
3615
3616        *res = 0;
3617        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3618                return -EIO;
3619        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3620                p = xdr_inline_decode(xdr, 8);
3621                if (unlikely(!p))
3622                        return -EIO;
3623                xdr_decode_hyper(p, res);
3624                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3625        }
3626        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3627        return status;
3628}
3629
3630static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3631{
3632        u32 n;
3633        __be32 *p;
3634        int status = 0;
3635
3636        p = xdr_inline_decode(xdr, 4);
3637        if (unlikely(!p))
3638                return -EIO;
3639        n = be32_to_cpup(p);
3640        if (n == 0)
3641                goto root_path;
3642        dprintk("pathname4: ");
3643        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3644                dprintk("cannot parse %d components in path\n", n);
3645                goto out_eio;
3646        }
3647        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3648                struct nfs4_string *component = &path->components[path->ncomponents];
3649                status = decode_opaque_inline(xdr, &component->len, &component->data);
3650                if (unlikely(status != 0))
3651                        goto out_eio;
3652                ifdebug (XDR)
3653                        pr_cont("%s%.*s ",
3654                                (path->ncomponents != n ? "/ " : ""),
3655                                component->len, component->data);
3656        }
3657out:
3658        return status;
3659root_path:
3660/* a root pathname is sent as a zero component4 */
3661        path->ncomponents = 1;
3662        path->components[0].len=0;
3663        path->components[0].data=NULL;
3664        dprintk("pathname4: /\n");
3665        goto out;
3666out_eio:
3667        dprintk(" status %d", status);
3668        status = -EIO;
3669        goto out;
3670}
3671
3672static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3673{
3674        int n;
3675        __be32 *p;
3676        int status = -EIO;
3677
3678        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3679                goto out;
3680        status = 0;
3681        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3682                goto out;
3683        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3684        status = -EIO;
3685        /* Ignore borken servers that return unrequested attrs */
3686        if (unlikely(res == NULL))
3687                goto out;
3688        dprintk("%s: fsroot:\n", __func__);
3689        status = decode_pathname(xdr, &res->fs_path);
3690        if (unlikely(status != 0))
3691                goto out;
3692        p = xdr_inline_decode(xdr, 4);
3693        if (unlikely(!p))
3694                goto out_eio;
3695        n = be32_to_cpup(p);
3696        if (n <= 0)
3697                goto out_eio;
3698        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3699                u32 m;
3700                struct nfs4_fs_location *loc;
3701
3702                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3703                        break;
3704                loc = &res->locations[res->nlocations];
3705                p = xdr_inline_decode(xdr, 4);
3706                if (unlikely(!p))
3707                        goto out_eio;
3708                m = be32_to_cpup(p);
3709
3710                dprintk("%s: servers:\n", __func__);
3711                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3712                        struct nfs4_string *server;
3713
3714                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3715                                unsigned int i;
3716                                dprintk("%s: using first %u of %u servers "
3717                                        "returned for location %u\n",
3718                                                __func__,
3719                                                NFS4_FS_LOCATION_MAXSERVERS,
3720                                                m, res->nlocations);
3721                                for (i = loc->nservers; i < m; i++) {
3722                                        unsigned int len;
3723                                        char *data;
3724                                        status = decode_opaque_inline(xdr, &len, &data);
3725                                        if (unlikely(status != 0))
3726                                                goto out_eio;
3727                                }
3728                                break;
3729                        }
3730                        server = &loc->servers[loc->nservers];
3731                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3732                        if (unlikely(status != 0))
3733                                goto out_eio;
3734                        dprintk("%s ", server->data);
3735                }
3736                status = decode_pathname(xdr, &loc->rootpath);
3737                if (unlikely(status != 0))
3738                        goto out_eio;
3739        }
3740        if (res->nlocations != 0)
3741                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3742out:
3743        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3744        return status;
3745out_eio:
3746        status = -EIO;
3747        goto out;
3748}
3749
3750static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3751{
3752        __be32 *p;
3753        int status = 0;
3754
3755        *res = 0;
3756        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3757                return -EIO;
3758        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3759                p = xdr_inline_decode(xdr, 8);
3760                if (unlikely(!p))
3761                        return -EIO;
3762                xdr_decode_hyper(p, res);
3763                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3764        }
3765        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3766        return status;
3767}
3768
3769static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3770{
3771        __be32 *p;
3772        int status = 0;
3773
3774        *maxlink = 1;
3775        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3776                return -EIO;
3777        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3778                p = xdr_inline_decode(xdr, 4);
3779                if (unlikely(!p))
3780                        return -EIO;
3781                *maxlink = be32_to_cpup(p);
3782                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3783        }
3784        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3785        return status;
3786}
3787
3788static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3789{
3790        __be32 *p;
3791        int status = 0;
3792
3793        *maxname = 1024;
3794        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3795                return -EIO;
3796        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3797                p = xdr_inline_decode(xdr, 4);
3798                if (unlikely(!p))
3799                        return -EIO;
3800                *maxname = be32_to_cpup(p);
3801                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3802        }
3803        dprintk("%s: maxname=%u\n", __func__, *maxname);
3804        return status;
3805}
3806
3807static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3808{
3809        __be32 *p;
3810        int status = 0;
3811
3812        *res = 1024;
3813        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3814                return -EIO;
3815        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3816                uint64_t maxread;
3817                p = xdr_inline_decode(xdr, 8);
3818                if (unlikely(!p))
3819                        return -EIO;
3820                xdr_decode_hyper(p, &maxread);
3821                if (maxread > 0x7FFFFFFF)
3822                        maxread = 0x7FFFFFFF;
3823                *res = (uint32_t)maxread;
3824                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3825        }
3826        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3827        return status;
3828}
3829
3830static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3831{
3832        __be32 *p;
3833        int status = 0;
3834
3835        *res = 1024;
3836        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3837                return -EIO;
3838        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3839                uint64_t maxwrite;
3840                p = xdr_inline_decode(xdr, 8);
3841                if (unlikely(!p))
3842                        return -EIO;
3843                xdr_decode_hyper(p, &maxwrite);
3844                if (maxwrite > 0x7FFFFFFF)
3845                        maxwrite = 0x7FFFFFFF;
3846                *res = (uint32_t)maxwrite;
3847                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3848        }
3849        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3850        return status;
3851}
3852
3853static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3854{
3855        uint32_t tmp;
3856        __be32 *p;
3857        int ret = 0;
3858
3859        *mode = 0;
3860        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3861                return -EIO;
3862        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3863                p = xdr_inline_decode(xdr, 4);
3864                if (unlikely(!p))
3865                        return -EIO;
3866                tmp = be32_to_cpup(p);
3867                *mode = tmp & ~S_IFMT;
3868                bitmap[1] &= ~FATTR4_WORD1_MODE;
3869                ret = NFS_ATTR_FATTR_MODE;
3870        }
3871        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3872        return ret;
3873}
3874
3875static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3876{
3877        __be32 *p;
3878        int ret = 0;
3879
3880        *nlink = 1;
3881        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3882                return -EIO;
3883        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3884                p = xdr_inline_decode(xdr, 4);
3885                if (unlikely(!p))
3886                        return -EIO;
3887                *nlink = be32_to_cpup(p);
3888                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3889                ret = NFS_ATTR_FATTR_NLINK;
3890        }
3891        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3892        return ret;
3893}
3894
3895static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3896                struct nfs4_string *name, gfp_t gfp_flags)
3897{
3898        ssize_t ret;
3899
3900        ret = xdr_stream_decode_string_dup(xdr, &name->data,
3901                        XDR_MAX_NETOBJ, gfp_flags);
3902        name->len = 0;
3903        if (ret > 0)
3904                name->len = ret;
3905        return ret;
3906}
3907
3908static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3909                const struct nfs_server *server, kuid_t *uid,
3910                struct nfs4_string *owner_name)
3911{
3912        ssize_t len;
3913        char *p;
3914
3915        *uid = make_kuid(&init_user_ns, -2);
3916        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3917                return -EIO;
3918        if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3919                return 0;
3920        bitmap[1] &= ~FATTR4_WORD1_OWNER;
3921
3922        if (owner_name != NULL) {
3923                len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3924                if (len <= 0)
3925                        goto out;
3926                dprintk("%s: name=%s\n", __func__, owner_name->data);
3927                return NFS_ATTR_FATTR_OWNER_NAME;
3928        } else {
3929                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3930                                XDR_MAX_NETOBJ);
3931                if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3932                        goto out;
3933                dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3934                return NFS_ATTR_FATTR_OWNER;
3935        }
3936out:
3937        if (len == -EBADMSG)
3938                return -EIO;
3939        return 0;
3940}
3941
3942static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3943                const struct nfs_server *server, kgid_t *gid,
3944                struct nfs4_string *group_name)
3945{
3946        ssize_t len;
3947        char *p;
3948
3949        *gid = make_kgid(&init_user_ns, -2);
3950        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3951                return -EIO;
3952        if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3953                return 0;
3954        bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3955
3956        if (group_name != NULL) {
3957                len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3958                if (len <= 0)
3959                        goto out;
3960                dprintk("%s: name=%s\n", __func__, group_name->data);
3961                return NFS_ATTR_FATTR_GROUP_NAME;
3962        } else {
3963                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3964                                XDR_MAX_NETOBJ);
3965                if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3966                        goto out;
3967                dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3968                return NFS_ATTR_FATTR_GROUP;
3969        }
3970out:
3971        if (len == -EBADMSG)
3972                return -EIO;
3973        return 0;
3974}
3975
3976static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3977{
3978        uint32_t major = 0, minor = 0;
3979        __be32 *p;
3980        int ret = 0;
3981
3982        *rdev = MKDEV(0,0);
3983        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3984                return -EIO;
3985        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3986                dev_t tmp;
3987
3988                p = xdr_inline_decode(xdr, 8);
3989                if (unlikely(!p))
3990                        return -EIO;
3991                major = be32_to_cpup(p++);
3992                minor = be32_to_cpup(p);
3993                tmp = MKDEV(major, minor);
3994                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3995                        *rdev = tmp;
3996                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3997                ret = NFS_ATTR_FATTR_RDEV;
3998        }
3999        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4000        return ret;

4001}
4002
4003static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4004{
4005        __be32 *p;
4006        int status = 0;
4007
4008        *res = 0;
4009        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4010                return -EIO;
4011        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4012                p = xdr_inline_decode(xdr, 8);
4013                if (unlikely(!p))
4014                        return -EIO;
4015                xdr_decode_hyper(p, res);
4016                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4017        }
4018        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4019        return status;
4020}
4021
4022static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4023{
4024        __be32 *p;
4025        int status = 0;
4026
4027        *res = 0;
4028        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4029                return -EIO;
4030        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4031                p = xdr_inline_decode(xdr, 8);
4032                if (unlikely(!p))
4033                        return -EIO;
4034                xdr_decode_hyper(p, res);
4035                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4036        }
4037        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4038        return status;
4039}
4040
4041static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4042{
4043        __be32 *p;
4044        int status = 0;
4045
4046        *res = 0;
4047        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4048                return -EIO;
4049        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4050                p = xdr_inline_decode(xdr, 8);
4051                if (unlikely(!p))
4052                        return -EIO;
4053                xdr_decode_hyper(p, res);
4054                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4055        }
4056        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4057        return status;
4058}
4059
4060static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4061{
4062        __be32 *p;
4063        int ret = 0;
4064
4065        *used = 0;
4066        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4067                return -EIO;
4068        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4069                p = xdr_inline_decode(xdr, 8);
4070                if (unlikely(!p))
4071                        return -EIO;
4072                xdr_decode_hyper(p, used);
4073                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4074                ret = NFS_ATTR_FATTR_SPACE_USED;
4075        }
4076        dprintk("%s: space used=%Lu\n", __func__,
4077                        (unsigned long long)*used);
4078        return ret;
4079}
4080
4081static __be32 *
4082xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4083{
4084        __u64 sec;
4085
4086        p = xdr_decode_hyper(p, &sec);
4087        t-> tv_sec = sec;
4088        t->tv_nsec = be32_to_cpup(p++);
4089        return p;
4090}
4091
4092static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4093{
4094        __be32 *p;
4095
4096        p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4097        if (unlikely(!p))
4098                return -EIO;
4099        xdr_decode_nfstime4(p, time);
4100        return 0;
4101}
4102
4103static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4104{
4105        int status = 0;
4106
4107        time->tv_sec = 0;
4108        time->tv_nsec = 0;
4109        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4110                return -EIO;
4111        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4112                status = decode_attr_time(xdr, time);
4113                if (status == 0)
4114                        status = NFS_ATTR_FATTR_ATIME;
4115                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4116        }
4117        dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4118        return status;
4119}
4120
4121static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4122{
4123        int status = 0;
4124
4125        time->tv_sec = 0;
4126        time->tv_nsec = 0;
4127        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4128                return -EIO;
4129        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4130                status = decode_attr_time(xdr, time);
4131                if (status == 0)
4132                        status = NFS_ATTR_FATTR_CTIME;
4133                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4134        }
4135        dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4136        return status;
4137}
4138
4139static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4140                                  struct timespec64 *time)
4141{
4142        int status = 0;
4143
4144        time->tv_sec = 0;
4145        time->tv_nsec = 0;
4146        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4147                return -EIO;
4148        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4149                status = decode_attr_time(xdr, time);
4150                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4151        }
4152        dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4153                time->tv_nsec);
4154        return status;
4155}
4156
4157static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4158                                        struct nfs4_label *label)
4159{
4160        uint32_t pi = 0;
4161        uint32_t lfs = 0;
4162        __u32 len;
4163        __be32 *p;
4164        int status = 0;
4165
4166        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4167                return -EIO;
4168        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4169                p = xdr_inline_decode(xdr, 4);
4170                if (unlikely(!p))
4171                        return -EIO;
4172                lfs = be32_to_cpup(p++);
4173                p = xdr_inline_decode(xdr, 4);
4174                if (unlikely(!p))
4175                        return -EIO;
4176                pi = be32_to_cpup(p++);
4177                p = xdr_inline_decode(xdr, 4);
4178                if (unlikely(!p))
4179                        return -EIO;
4180                len = be32_to_cpup(p++);
4181                p = xdr_inline_decode(xdr, len);
4182                if (unlikely(!p))
4183                        return -EIO;
4184                if (len < NFS4_MAXLABELLEN) {
4185                        if (label) {
4186                                if (label->len) {
4187                                        if (label->len < len)
4188                                                return -ERANGE;
4189                                        memcpy(label->label, p, len);
4190                                }
4191                                label->len = len;
4192                                label->pi = pi;
4193                                label->lfs = lfs;
4194                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4195                        }
4196                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4197                } else
4198                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4199                                        __func__, len);
4200        }
4201        if (label && label->label)
4202                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4203                        (char *)label->label, label->len, label->pi, label->lfs);
4204        return status;
4205}
4206
4207static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4208{
4209        int status = 0;
4210
4211        time->tv_sec = 0;
4212        time->tv_nsec = 0;
4213        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4214                return -EIO;
4215        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4216                status = decode_attr_time(xdr, time);
4217                if (status == 0)
4218                        status = NFS_ATTR_FATTR_MTIME;
4219                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4220        }
4221        dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4222        return status;
4223}
4224
4225static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4226                                    uint32_t *res)
4227{
4228        __be32 *p;
4229
4230        *res = 0;
4231        if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4232                return -EIO;
4233        if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4234                p = xdr_inline_decode(xdr, 4);
4235                if (unlikely(!p))
4236                        return -EIO;
4237                *res = be32_to_cpup(p);
4238                bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4239        }
4240        dprintk("%s: XATTR support=%s\n", __func__,
4241                *res == 0 ? "false" : "true");
4242        return 0;
4243}
4244
4245static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4246{
4247        unsigned int attrwords = XDR_QUADLEN(attrlen);
4248        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4249
4250        if (unlikely(attrwords != nwords)) {
4251                dprintk("%s: server returned incorrect attribute length: "
4252                        "%u %c %u\n",
4253                                __func__,
4254                                attrwords << 2,
4255                                (attrwords < nwords) ? '<' : '>',
4256                                nwords << 2);
4257                return -EIO;
4258        }
4259        return 0;
4260}
4261
4262static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4263{
4264        __be32 *p;
4265
4266        p = xdr_inline_decode(xdr, 20);
4267        if (unlikely(!p))
4268                return -EIO;
4269        cinfo->atomic = be32_to_cpup(p++);
4270        p = xdr_decode_hyper(p, &cinfo->before);
4271        xdr_decode_hyper(p, &cinfo->after);
4272        return 0;
4273}
4274
4275static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4276{
4277        __be32 *p;
4278        uint32_t supp, acc;
4279        int status;
4280
4281        status = decode_op_hdr(xdr, OP_ACCESS);
4282        if (status)
4283                return status;
4284        p = xdr_inline_decode(xdr, 8);
4285        if (unlikely(!p))
4286                return -EIO;
4287        supp = be32_to_cpup(p++);
4288        acc = be32_to_cpup(p);
4289        *supported = supp;
4290        *access = acc;
4291        return 0;
4292}
4293
4294static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4295{
4296        ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4297        if (unlikely(ret < 0))
4298                return -EIO;
4299        return 0;
4300}
4301
4302static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303{
4304        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4305}
4306
4307static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4308{
4309        stateid->type = NFS4_OPEN_STATEID_TYPE;
4310        return decode_stateid(xdr, stateid);
4311}
4312
4313static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314{
4315        stateid->type = NFS4_LOCK_STATEID_TYPE;
4316        return decode_stateid(xdr, stateid);
4317}
4318
4319static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320{
4321        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4322        return decode_stateid(xdr, stateid);
4323}
4324
4325static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326{
4327        nfs4_stateid dummy;
4328
4329        nfs4_stateid_copy(stateid, &invalid_stateid);
4330        return decode_stateid(xdr, &dummy);
4331}
4332
4333static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4334{
4335        int status;
4336
4337        status = decode_op_hdr(xdr, OP_CLOSE);
4338        if (status != -EIO)
4339                nfs_increment_open_seqid(status, res->seqid);
4340        if (!status)
4341                status = decode_invalid_stateid(xdr, &res->stateid);
4342        return status;
4343}
4344
4345static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4346{
4347        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4348}
4349
4350static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4351{
4352        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4353}
4354
4355static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4356{
4357        struct nfs_writeverf *verf = res->verf;
4358        int status;
4359
4360        status = decode_op_hdr(xdr, OP_COMMIT);
4361        if (!status)
4362                status = decode_write_verifier(xdr, &verf->verifier);
4363        if (!status)
4364                verf->committed = NFS_FILE_SYNC;
4365        return status;
4366}
4367
4368static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4369{
4370        __be32 *p;
4371        uint32_t bmlen;
4372        int status;
4373
4374        status = decode_op_hdr(xdr, OP_CREATE);
4375        if (status)
4376                return status;
4377        if ((status = decode_change_info(xdr, cinfo)))
4378                return status;
4379        p = xdr_inline_decode(xdr, 4);
4380        if (unlikely(!p))
4381                return -EIO;
4382        bmlen = be32_to_cpup(p);
4383        p = xdr_inline_decode(xdr, bmlen << 2);
4384        if (likely(p))
4385                return 0;
4386        return -EIO;
4387}
4388
4389static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4390{
4391        unsigned int savep;
4392        uint32_t attrlen, bitmap[3] = {0};
4393        int status;
4394
4395        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4396                goto xdr_error;
4397        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4398                goto xdr_error;
4399        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4400                goto xdr_error;
4401        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4402                goto xdr_error;
4403        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4404                                                 &res->fh_expire_type)) != 0)
4405                goto xdr_error;
4406        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4407                goto xdr_error;
4408        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4409                goto xdr_error;
4410        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4411                goto xdr_error;
4412        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4413                                res->exclcreat_bitmask)) != 0)
4414                goto xdr_error;
4415        status = verify_attr_len(xdr, savep, attrlen);
4416xdr_error:
4417        dprintk("%s: xdr returned %d!\n", __func__, -status);
4418        return status;
4419}
4420
4421static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4422{
4423        unsigned int savep;
4424        uint32_t attrlen, bitmap[3] = {0};
4425        int status;
4426
4427        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4428                goto xdr_error;
4429        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4430                goto xdr_error;
4431        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4432                goto xdr_error;
4433
4434        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4435                goto xdr_error;
4436        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4437                goto xdr_error;
4438        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4439                goto xdr_error;
4440
4441        status = -EIO;
4442        if (unlikely(bitmap[0]))
4443                goto xdr_error;
4444
4445        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4446                goto xdr_error;
4447        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4448                goto xdr_error;
4449        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4450                goto xdr_error;
4451
4452        status = verify_attr_len(xdr, savep, attrlen);
4453xdr_error:
4454        dprintk("%s: xdr returned %d!\n", __func__, -status);
4455        return status;
4456}
4457
4458static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4459{
4460        unsigned int savep;
4461        uint32_t attrlen, bitmap[3] = {0};
4462        int status;
4463
4464        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4465                goto xdr_error;
4466        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4467                goto xdr_error;
4468        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4469                goto xdr_error;
4470
4471        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4472                goto xdr_error;
4473        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4474                goto xdr_error;
4475
4476        status = verify_attr_len(xdr, savep, attrlen);
4477xdr_error:
4478        dprintk("%s: xdr returned %d!\n", __func__, -status);
4479        return status;
4480}
4481
4482static int decode_threshold_hint(struct xdr_stream *xdr,
4483                                  uint32_t *bitmap,
4484                                  uint64_t *res,
4485                                  uint32_t hint_bit)
4486{
4487        __be32 *p;
4488
4489        *res = 0;
4490        if (likely(bitmap[0] & hint_bit)) {
4491                p = xdr_inline_decode(xdr, 8);
4492                if (unlikely(!p))
4493                        return -EIO;
4494                xdr_decode_hyper(p, res);
4495        }
4496        return 0;
4497}
4498
4499static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500                                        struct nfs4_threshold *res)
4501{
4502        __be32 *p;
4503        unsigned int savep;
4504        uint32_t bitmap[3] = {0,}, attrlen;
4505        int status;
4506
4507        /* layout type */
4508        p = xdr_inline_decode(xdr, 4);
4509        if (unlikely(!p))
4510                return -EIO;
4511        res->l_type = be32_to_cpup(p);
4512
4513        /* thi_hintset bitmap */
4514        status = decode_attr_bitmap(xdr, bitmap);
4515        if (status < 0)
4516                goto xdr_error;
4517
4518        /* thi_hintlist length */
4519        status = decode_attr_length(xdr, &attrlen, &savep);
4520        if (status < 0)
4521                goto xdr_error;
4522        /* thi_hintlist */
4523        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4524        if (status < 0)
4525                goto xdr_error;
4526        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4527        if (status < 0)
4528                goto xdr_error;
4529        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4530                                       THRESHOLD_RD_IO);
4531        if (status < 0)
4532                goto xdr_error;
4533        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4534                                       THRESHOLD_WR_IO);
4535        if (status < 0)
4536                goto xdr_error;
4537
4538        status = verify_attr_len(xdr, savep, attrlen);
4539        res->bm = bitmap[0];
4540
4541        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4542                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4543                res->wr_io_sz);
4544xdr_error:
4545        dprintk("%s ret=%d!\n", __func__, status);
4546        return status;
4547}
4548
4549/*
4550 * Thresholds on pNFS direct I/O vrs MDS I/O
4551 */
4552static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4553                                    uint32_t *bitmap,
4554                                    struct nfs4_threshold *res)
4555{
4556        __be32 *p;
4557        int status = 0;
4558        uint32_t num;
4559
4560        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4561                return -EIO;
4562        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4563                /* Did the server return an unrequested attribute? */
4564                if (unlikely(res == NULL))
4565                        return -EREMOTEIO;
4566                p = xdr_inline_decode(xdr, 4);
4567                if (unlikely(!p))
4568                        return -EIO;
4569                num = be32_to_cpup(p);
4570                if (num == 0)
4571                        return 0;
4572                if (num > 1)
4573                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4574                                "drivers per filesystem not supported\n",
4575                                __func__);
4576
4577                status = decode_first_threshold_item4(xdr, res);
4578                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4579        }
4580        return status;
4581}
4582
4583static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4584                struct nfs_fattr *fattr, struct nfs_fh *fh,
4585                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4586                const struct nfs_server *server)
4587{
4588        int status;
4589        umode_t fmode = 0;
4590        uint32_t type;
4591        int32_t err;
4592
4593        status = decode_attr_type(xdr, bitmap, &type);
4594        if (status < 0)
4595                goto xdr_error;
4596        fattr->mode = 0;
4597        if (status != 0) {
4598                fattr->mode |= nfs_type2fmt[type];
4599                fattr->valid |= status;
4600        }
4601
4602        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4603        if (status < 0)
4604                goto xdr_error;
4605        fattr->valid |= status;
4606
4607        status = decode_attr_size(xdr, bitmap, &fattr->size);
4608        if (status < 0)
4609                goto xdr_error;
4610        fattr->valid |= status;
4611
4612        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4613        if (status < 0)
4614                goto xdr_error;
4615        fattr->valid |= status;
4616
4617        err = 0;
4618        status = decode_attr_error(xdr, bitmap, &err);
4619        if (status < 0)
4620                goto xdr_error;
4621
4622        status = decode_attr_filehandle(xdr, bitmap, fh);
4623        if (status < 0)
4624                goto xdr_error;
4625
4626        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4627        if (status < 0)
4628                goto xdr_error;
4629        fattr->valid |= status;
4630
4631        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4632        if (status < 0)
4633                goto xdr_error;
4634        fattr->valid |= status;
4635
4636        status = -EIO;
4637        if (unlikely(bitmap[0]))
4638                goto xdr_error;
4639
4640        status = decode_attr_mode(xdr, bitmap, &fmode);
4641        if (status < 0)
4642                goto xdr_error;
4643        if (status != 0) {
4644                fattr->mode |= fmode;
4645                fattr->valid |= status;
4646        }
4647
4648        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4649        if (status < 0)
4650                goto xdr_error;
4651        fattr->valid |= status;
4652
4653        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4654        if (status < 0)
4655                goto xdr_error;
4656        fattr->valid |= status;
4657
4658        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4659        if (status < 0)
4660                goto xdr_error;
4661        fattr->valid |= status;
4662
4663        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4664        if (status < 0)
4665                goto xdr_error;
4666        fattr->valid |= status;
4667
4668        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4669        if (status < 0)
4670                goto xdr_error;
4671        fattr->valid |= status;
4672
4673        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4674        if (status < 0)
4675                goto xdr_error;
4676        fattr->valid |= status;
4677
4678        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4679        if (status < 0)
4680                goto xdr_error;
4681        fattr->valid |= status;
4682
4683        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4684        if (status < 0)
4685                goto xdr_error;
4686        fattr->valid |= status;
4687
4688        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4689        if (status < 0)
4690                goto xdr_error;
4691        fattr->valid |= status;
4692
4693        status = -EIO;
4694        if (unlikely(bitmap[1]))
4695                goto xdr_error;
4696
4697        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4698        if (status < 0)
4699                goto xdr_error;
4700
4701        if (label) {
4702                status = decode_attr_security_label(xdr, bitmap, label);
4703                if (status < 0)
4704                        goto xdr_error;
4705                fattr->valid |= status;
4706        }
4707
4708xdr_error:
4709        dprintk("%s: xdr returned %d\n", __func__, -status);
4710        return status;
4711}
4712
4713static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4714                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4715                struct nfs4_label *label, const struct nfs_server *server)
4716{
4717        unsigned int savep;
4718        uint32_t attrlen,
4719                 bitmap[3] = {0};
4720        int status;
4721
4722        status = decode_op_hdr(xdr, OP_GETATTR);
4723        if (status < 0)
4724                goto xdr_error;
4725
4726        status = decode_attr_bitmap(xdr, bitmap);
4727        if (status < 0)
4728                goto xdr_error;
4729
4730        status = decode_attr_length(xdr, &attrlen, &savep);
4731        if (status < 0)
4732                goto xdr_error;
4733
4734        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4735                                        label, server);
4736        if (status < 0)
4737                goto xdr_error;
4738
4739        status = verify_attr_len(xdr, savep, attrlen);
4740xdr_error:
4741        dprintk("%s: xdr returned %d\n", __func__, -status);
4742        return status;
4743}
4744
4745static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4746                struct nfs4_label *label, const struct nfs_server *server)
4747{
4748        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4749}
4750
4751static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4752                const struct nfs_server *server)
4753{
4754        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4755}
4756
4757/*
4758 * Decode potentially multiple layout types.
4759 */
4760static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4761                                    struct nfs_fsinfo *fsinfo)
4762{
4763        __be32 *p;
4764        uint32_t i;
4765
4766        p = xdr_inline_decode(xdr, 4);
4767        if (unlikely(!p))
4768                return -EIO;
4769        fsinfo->nlayouttypes = be32_to_cpup(p);
4770
4771        /* pNFS is not supported by the underlying file system */
4772        if (fsinfo->nlayouttypes == 0)
4773                return 0;
4774
4775        /* Decode and set first layout type, move xdr->p past unused types */
4776        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4777        if (unlikely(!p))
4778                return -EIO;
4779
4780        /* If we get too many, then just cap it at the max */
4781        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4782                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4783                        __func__, fsinfo->nlayouttypes);
4784                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4785        }
4786
4787        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4788                fsinfo->layouttype[i] = be32_to_cpup(p++);
4789        return 0;
4790}
4791
4792/*
4793 * The type of file system exported.
4794 * Note we must ensure that layouttype is set in any non-error case.
4795 */
4796static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4797                                struct nfs_fsinfo *fsinfo)
4798{
4799        int status = 0;
4800
4801        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4802        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4803                return -EIO;
4804        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4805                status = decode_pnfs_layout_types(xdr, fsinfo);
4806                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4807        }
4808        return status;
4809}
4810
4811/*
4812 * The prefered block size for layout directed io
4813 */
4814static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4815                                      uint32_t *res)
4816{
4817        __be32 *p;
4818
4819        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4820        *res = 0;
4821        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4822                p = xdr_inline_decode(xdr, 4);
4823                if (unlikely(!p))
4824                        return -EIO;
4825                *res = be32_to_cpup(p);
4826                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4827        }
4828        return 0;
4829}
4830
4831/*
4832 * The granularity of a CLONE operation.
4833 */
4834static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4835                                     uint32_t *res)
4836{
4837        __be32 *p;
4838
4839        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4840        *res = 0;
4841        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4842                p = xdr_inline_decode(xdr, 4);
4843                if (unlikely(!p))
4844                        return -EIO;
4845                *res = be32_to_cpup(p);
4846                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4847        }
4848        return 0;
4849}
4850
4851static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4852                                        uint32_t *bitmap,
4853                                        enum nfs4_change_attr_type *res)
4854{
4855        u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4856
4857        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4858        if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4859                if (xdr_stream_decode_u32(xdr, &tmp))
4860                        return -EIO;
4861                bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4862        }
4863
4864        switch(tmp) {
4865        case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4866        case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4867        case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4868        case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4869                *res = tmp;
4870                break;
4871        default:
4872                *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4873        }
4874        return 0;
4875}
4876
4877static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4878{
4879        unsigned int savep;
4880        uint32_t attrlen, bitmap[3];
4881        int status;
4882
4883        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4884                goto xdr_error;
4885        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4886                goto xdr_error;
4887        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4888                goto xdr_error;
4889
4890        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4891
4892        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4893                goto xdr_error;
4894        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4895                goto xdr_error;
4896        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4897                goto xdr_error;
4898        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4899        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4900                goto xdr_error;
4901        fsinfo->wtpref = fsinfo->wtmax;
4902
4903        status = -EIO;
4904        if (unlikely(bitmap[0]))
4905                goto xdr_error;
4906
4907        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4908        if (status != 0)
4909                goto xdr_error;
4910        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4911        if (status != 0)
4912                goto xdr_error;
4913
4914        status = -EIO;
4915        if (unlikely(bitmap[1]))
4916                goto xdr_error;
4917
4918        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4919        if (status)
4920                goto xdr_error;
4921        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4922        if (status)
4923                goto xdr_error;
4924
4925        status = decode_attr_change_attr_type(xdr, bitmap,
4926                                              &fsinfo->change_attr_type);
4927        if (status)
4928                goto xdr_error;
4929
4930        status = decode_attr_xattrsupport(xdr, bitmap,
4931                                          &fsinfo->xattr_support);
4932        if (status)
4933                goto xdr_error;
4934
4935        status = verify_attr_len(xdr, savep, attrlen);
4936xdr_error:
4937        dprintk("%s: xdr returned %d!\n", __func__, -status);
4938        return status;
4939}
4940
4941static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4942{
4943        __be32 *p;
4944        uint32_t len;
4945        int status;
4946
4947        /* Zero handle first to allow comparisons */
4948        memset(fh, 0, sizeof(*fh));
4949
4950        status = decode_op_hdr(xdr, OP_GETFH);
4951        if (status)
4952                return status;
4953
4954        p = xdr_inline_decode(xdr, 4);
4955        if (unlikely(!p))
4956                return -EIO;
4957        len = be32_to_cpup(p);
4958        if (len > NFS4_FHSIZE || len == 0) {
4959                trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
4960                return -EREMOTEIO;
4961        }
4962        fh->size = len;
4963        p = xdr_inline_decode(xdr, len);
4964        if (unlikely(!p))
4965                return -EIO;
4966        memcpy(fh->data, p, len);
4967        return 0;
4968}
4969
4970static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4971{
4972        int status;
4973
4974        status = decode_op_hdr(xdr, OP_LINK);
4975        if (status)
4976                return status;
4977        return decode_change_info(xdr, cinfo);
4978}
4979
4980/*
4981 * We create the owner, so we know a proper owner.id length is 4.
4982 */
4983static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4984{
4985        uint64_t offset, length, clientid;
4986        __be32 *p;
4987        uint32_t namelen, type;
4988
4989        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4990        if (unlikely(!p))
4991                return -EIO;
4992        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4993        p = xdr_decode_hyper(p, &length);
4994        type = be32_to_cpup(p++); /* 4 byte read */
4995        if (fl != NULL) { /* manipulate file lock */
4996                fl->fl_start = (loff_t)offset;
4997                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4998                if (length == ~(uint64_t)0)
4999                        fl->fl_end = OFFSET_MAX;
5000                fl->fl_type = F_WRLCK;

5001                if (type & 1)
5002                        fl->fl_type = F_RDLCK;
5003                fl->fl_pid = 0;
5004        }
5005        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5006        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5007        p = xdr_inline_decode(xdr, namelen); /* variable size field */
5008        if (likely(!p))
5009                return -EIO;
5010        return -NFS4ERR_DENIED;
5011}
5012
5013static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5014{
5015        int status;
5016
5017        status = decode_op_hdr(xdr, OP_LOCK);
5018        if (status == -EIO)
5019                goto out;
5020        if (status == 0) {
5021                status = decode_lock_stateid(xdr, &res->stateid);
5022                if (unlikely(status))
5023                        goto out;
5024        } else if (status == -NFS4ERR_DENIED)
5025                status = decode_lock_denied(xdr, NULL);
5026        if (res->open_seqid != NULL)
5027                nfs_increment_open_seqid(status, res->open_seqid);
5028        nfs_increment_lock_seqid(status, res->lock_seqid);
5029out:
5030        return status;
5031}
5032
5033static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5034{
5035        int status;
5036        status = decode_op_hdr(xdr, OP_LOCKT);
5037        if (status == -NFS4ERR_DENIED)
5038                return decode_lock_denied(xdr, res->denied);
5039        return status;
5040}
5041
5042static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5043{
5044        int status;
5045
5046        status = decode_op_hdr(xdr, OP_LOCKU);
5047        if (status != -EIO)
5048                nfs_increment_lock_seqid(status, res->seqid);
5049        if (status == 0)
5050                status = decode_lock_stateid(xdr, &res->stateid);
5051        return status;
5052}
5053
5054static int decode_release_lockowner(struct xdr_stream *xdr)
5055{
5056        return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5057}
5058
5059static int decode_lookup(struct xdr_stream *xdr)
5060{
5061        return decode_op_hdr(xdr, OP_LOOKUP);
5062}
5063
5064static int decode_lookupp(struct xdr_stream *xdr)
5065{
5066        return decode_op_hdr(xdr, OP_LOOKUPP);
5067}
5068
5069/* This is too sick! */
5070static int decode_space_limit(struct xdr_stream *xdr,
5071                unsigned long *pagemod_limit)
5072{
5073        __be32 *p;
5074        uint32_t limit_type, nblocks, blocksize;
5075        u64 maxsize = 0;
5076
5077        p = xdr_inline_decode(xdr, 12);
5078        if (unlikely(!p))
5079                return -EIO;
5080        limit_type = be32_to_cpup(p++);
5081        switch (limit_type) {
5082        case NFS4_LIMIT_SIZE:
5083                xdr_decode_hyper(p, &maxsize);
5084                break;
5085        case NFS4_LIMIT_BLOCKS:
5086                nblocks = be32_to_cpup(p++);
5087                blocksize = be32_to_cpup(p);
5088                maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5089        }
5090        maxsize >>= PAGE_SHIFT;
5091        *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5092        return 0;
5093}
5094
5095static int decode_rw_delegation(struct xdr_stream *xdr,
5096                uint32_t delegation_type,
5097                struct nfs_openres *res)
5098{
5099        __be32 *p;
5100        int status;
5101
5102        status = decode_delegation_stateid(xdr, &res->delegation);
5103        if (unlikely(status))
5104                return status;
5105        p = xdr_inline_decode(xdr, 4);
5106        if (unlikely(!p))
5107                return -EIO;
5108        res->do_recall = be32_to_cpup(p);
5109
5110        switch (delegation_type) {
5111        case NFS4_OPEN_DELEGATE_READ:
5112                res->delegation_type = FMODE_READ;
5113                break;
5114        case NFS4_OPEN_DELEGATE_WRITE:
5115                res->delegation_type = FMODE_WRITE|FMODE_READ;
5116                if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5117                                return -EIO;
5118        }
5119        return decode_ace(xdr, NULL);
5120}
5121
5122static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5123{
5124        __be32 *p;
5125        uint32_t why_no_delegation;
5126
5127        p = xdr_inline_decode(xdr, 4);
5128        if (unlikely(!p))
5129                return -EIO;
5130        why_no_delegation = be32_to_cpup(p);
5131        switch (why_no_delegation) {
5132                case WND4_CONTENTION:
5133                case WND4_RESOURCE:
5134                        xdr_inline_decode(xdr, 4);
5135                        /* Ignore for now */
5136        }
5137        return 0;
5138}
5139
5140static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5141{
5142        __be32 *p;
5143        uint32_t delegation_type;
5144
5145        p = xdr_inline_decode(xdr, 4);
5146        if (unlikely(!p))
5147                return -EIO;
5148        delegation_type = be32_to_cpup(p);
5149        res->delegation_type = 0;
5150        switch (delegation_type) {
5151        case NFS4_OPEN_DELEGATE_NONE:
5152                return 0;
5153        case NFS4_OPEN_DELEGATE_READ:
5154        case NFS4_OPEN_DELEGATE_WRITE:
5155                return decode_rw_delegation(xdr, delegation_type, res);
5156        case NFS4_OPEN_DELEGATE_NONE_EXT:
5157                return decode_no_delegation(xdr, res);
5158        }
5159        return -EIO;
5160}
5161
5162static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5163{
5164        __be32 *p;
5165        uint32_t savewords, bmlen, i;
5166        int status;
5167
5168        if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5169                return status;
5170        nfs_increment_open_seqid(status, res->seqid);
5171        if (status)
5172                return status;
5173        status = decode_open_stateid(xdr, &res->stateid);
5174        if (unlikely(status))
5175                return status;
5176
5177        decode_change_info(xdr, &res->cinfo);
5178
5179        p = xdr_inline_decode(xdr, 8);
5180        if (unlikely(!p))
5181                return -EIO;
5182        res->rflags = be32_to_cpup(p++);
5183        bmlen = be32_to_cpup(p);
5184        if (bmlen > 10)
5185                goto xdr_error;
5186
5187        p = xdr_inline_decode(xdr, bmlen << 2);
5188        if (unlikely(!p))
5189                return -EIO;
5190        savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5191        for (i = 0; i < savewords; ++i)
5192                res->attrset[i] = be32_to_cpup(p++);
5193        for (; i < NFS4_BITMAP_SIZE; i++)
5194                res->attrset[i] = 0;
5195
5196        return decode_delegation(xdr, res);
5197xdr_error:
5198        dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5199        return -EIO;
5200}
5201
5202static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5203{
5204        int status;
5205
5206        status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5207        if (status != -EIO)
5208                nfs_increment_open_seqid(status, res->seqid);
5209        if (!status)
5210                status = decode_open_stateid(xdr, &res->stateid);
5211        return status;
5212}
5213
5214static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5215{
5216        int status;
5217
5218        status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5219        if (status != -EIO)
5220                nfs_increment_open_seqid(status, res->seqid);
5221        if (!status)
5222                status = decode_open_stateid(xdr, &res->stateid);
5223        return status;
5224}
5225
5226static int decode_putfh(struct xdr_stream *xdr)
5227{
5228        return decode_op_hdr(xdr, OP_PUTFH);
5229}
5230
5231static int decode_putrootfh(struct xdr_stream *xdr)
5232{
5233        return decode_op_hdr(xdr, OP_PUTROOTFH);
5234}
5235
5236static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5237                       struct nfs_pgio_res *res)
5238{
5239        __be32 *p;
5240        uint32_t count, eof, recvd;
5241        int status;
5242
5243        status = decode_op_hdr(xdr, OP_READ);
5244        if (status)
5245                return status;
5246        p = xdr_inline_decode(xdr, 8);
5247        if (unlikely(!p))
5248                return -EIO;
5249        eof = be32_to_cpup(p++);
5250        count = be32_to_cpup(p);
5251        recvd = xdr_read_pages(xdr, count);
5252        if (count > recvd) {
5253                dprintk("NFS: server cheating in read reply: "
5254                                "count %u > recvd %u\n", count, recvd);
5255                count = recvd;
5256                eof = 0;
5257        }
5258        res->eof = eof;
5259        res->count = count;
5260        return 0;
5261}
5262
5263static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5264{
5265        int             status;
5266        __be32          verf[2];
5267
5268        status = decode_op_hdr(xdr, OP_READDIR);
5269        if (!status)
5270                status = decode_verifier(xdr, readdir->verifier.data);
5271        if (unlikely(status))
5272                return status;
5273        memcpy(verf, readdir->verifier.data, sizeof(verf));
5274        dprintk("%s: verifier = %08x:%08x\n",
5275                        __func__, verf[0], verf[1]);
5276        return xdr_read_pages(xdr, xdr->buf->page_len);
5277}
5278
5279static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5280{
5281        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5282        u32 len, recvd;
5283        __be32 *p;
5284        int status;
5285
5286        status = decode_op_hdr(xdr, OP_READLINK);
5287        if (status)
5288                return status;
5289
5290        /* Convert length of symlink */
5291        p = xdr_inline_decode(xdr, 4);
5292        if (unlikely(!p))
5293                return -EIO;
5294        len = be32_to_cpup(p);
5295        if (len >= rcvbuf->page_len || len <= 0) {
5296                dprintk("nfs: server returned giant symlink!\n");
5297                return -ENAMETOOLONG;
5298        }
5299        recvd = xdr_read_pages(xdr, len);
5300        if (recvd < len) {
5301                dprintk("NFS: server cheating in readlink reply: "
5302                                "count %u > recvd %u\n", len, recvd);
5303                return -EIO;
5304        }
5305        /*
5306         * The XDR encode routine has set things up so that
5307         * the link text will be copied directly into the
5308         * buffer.  We just have to do overflow-checking,
5309         * and null-terminate the text (the VFS expects
5310         * null-termination).
5311         */
5312        xdr_terminate_string(rcvbuf, len);
5313        return 0;
5314}
5315
5316static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5317{
5318        int status;
5319
5320        status = decode_op_hdr(xdr, OP_REMOVE);
5321        if (status)
5322                goto out;
5323        status = decode_change_info(xdr, cinfo);
5324out:
5325        return status;
5326}
5327
5328static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5329              struct nfs4_change_info *new_cinfo)
5330{
5331        int status;
5332
5333        status = decode_op_hdr(xdr, OP_RENAME);
5334        if (status)
5335                goto out;
5336        if ((status = decode_change_info(xdr, old_cinfo)))
5337                goto out;
5338        status = decode_change_info(xdr, new_cinfo);
5339out:
5340        return status;
5341}
5342
5343static int decode_renew(struct xdr_stream *xdr)
5344{
5345        return decode_op_hdr(xdr, OP_RENEW);
5346}
5347
5348static int
5349decode_restorefh(struct xdr_stream *xdr)
5350{
5351        return decode_op_hdr(xdr, OP_RESTOREFH);
5352}
5353
5354static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5355                         struct nfs_getaclres *res)
5356{
5357        unsigned int savep;
5358        uint32_t attrlen,
5359                 bitmap[3] = {0};
5360        int status;
5361
5362        res->acl_len = 0;
5363        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5364                goto out;
5365
5366        xdr_enter_page(xdr, xdr->buf->page_len);
5367
5368        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5369                goto out;
5370        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5371                goto out;
5372
5373        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5374                return -EIO;
5375        if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5376
5377                /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5378                 * are stored with the acl data to handle the problem of
5379                 * variable length bitmaps.*/
5380                res->acl_data_offset = xdr_page_pos(xdr);
5381                res->acl_len = attrlen;
5382
5383                /* Check for receive buffer overflow */
5384                if (res->acl_len > xdr_stream_remaining(xdr) ||
5385                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5386                        res->acl_flags |= NFS4_ACL_TRUNC;
5387                        dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5388                                attrlen, xdr_stream_remaining(xdr));
5389                }
5390        } else
5391                status = -EOPNOTSUPP;
5392
5393out:
5394        return status;
5395}
5396
5397static int
5398decode_savefh(struct xdr_stream *xdr)
5399{
5400        return decode_op_hdr(xdr, OP_SAVEFH);
5401}
5402
5403static int decode_setattr(struct xdr_stream *xdr)
5404{
5405        int status;
5406
5407        status = decode_op_hdr(xdr, OP_SETATTR);
5408        if (status)
5409                return status;
5410        if (decode_bitmap4(xdr, NULL, 0) >= 0)
5411                return 0;
5412        return -EIO;
5413}
5414
5415static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5416{
5417        __be32 *p;
5418        uint32_t opnum;
5419        int32_t nfserr;
5420
5421        p = xdr_inline_decode(xdr, 8);
5422        if (unlikely(!p))
5423                return -EIO;
5424        opnum = be32_to_cpup(p++);
5425        if (opnum != OP_SETCLIENTID) {
5426                dprintk("nfs: decode_setclientid: Server returned operation"
5427                        " %d\n", opnum);
5428                return -EIO;
5429        }
5430        nfserr = be32_to_cpup(p);
5431        if (nfserr == NFS_OK) {
5432                p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5433                if (unlikely(!p))
5434                        return -EIO;
5435                p = xdr_decode_hyper(p, &res->clientid);
5436                memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5437        } else if (nfserr == NFSERR_CLID_INUSE) {
5438                uint32_t len;
5439
5440                /* skip netid string */
5441                p = xdr_inline_decode(xdr, 4);
5442                if (unlikely(!p))
5443                        return -EIO;
5444                len = be32_to_cpup(p);
5445                p = xdr_inline_decode(xdr, len);
5446                if (unlikely(!p))
5447                        return -EIO;
5448
5449                /* skip uaddr string */
5450                p = xdr_inline_decode(xdr, 4);
5451                if (unlikely(!p))
5452                        return -EIO;
5453                len = be32_to_cpup(p);
5454                p = xdr_inline_decode(xdr, len);
5455                if (unlikely(!p))
5456                        return -EIO;
5457                return -NFSERR_CLID_INUSE;
5458        } else
5459                return nfs4_stat_to_errno(nfserr);
5460
5461        return 0;
5462}
5463
5464static int decode_setclientid_confirm(struct xdr_stream *xdr)
5465{
5466        return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5467}
5468
5469static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5470{
5471        __be32 *p;
5472        int status;
5473
5474        status = decode_op_hdr(xdr, OP_WRITE);
5475        if (status)
5476                return status;
5477
5478        p = xdr_inline_decode(xdr, 8);
5479        if (unlikely(!p))
5480                return -EIO;
5481        res->count = be32_to_cpup(p++);
5482        res->verf->committed = be32_to_cpup(p++);
5483        return decode_write_verifier(xdr, &res->verf->verifier);
5484}
5485
5486static int decode_delegreturn(struct xdr_stream *xdr)
5487{
5488        return decode_op_hdr(xdr, OP_DELEGRETURN);
5489}
5490
5491static int decode_secinfo_gss(struct xdr_stream *xdr,
5492                              struct nfs4_secinfo4 *flavor)
5493{
5494        u32 oid_len;
5495        __be32 *p;
5496
5497        p = xdr_inline_decode(xdr, 4);
5498        if (unlikely(!p))
5499                return -EIO;
5500        oid_len = be32_to_cpup(p);
5501        if (oid_len > GSS_OID_MAX_LEN)
5502                return -EINVAL;
5503
5504        p = xdr_inline_decode(xdr, oid_len);
5505        if (unlikely(!p))
5506                return -EIO;
5507        memcpy(flavor->flavor_info.oid.data, p, oid_len);
5508        flavor->flavor_info.oid.len = oid_len;
5509
5510        p = xdr_inline_decode(xdr, 8);
5511        if (unlikely(!p))
5512                return -EIO;
5513        flavor->flavor_info.qop = be32_to_cpup(p++);
5514        flavor->flavor_info.service = be32_to_cpup(p);
5515
5516        return 0;
5517}
5518
5519static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520{
5521        struct nfs4_secinfo4 *sec_flavor;
5522        unsigned int i, num_flavors;
5523        int status;
5524        __be32 *p;
5525
5526        p = xdr_inline_decode(xdr, 4);
5527        if (unlikely(!p))
5528                return -EIO;
5529
5530        res->flavors->num_flavors = 0;
5531        num_flavors = be32_to_cpup(p);
5532
5533        for (i = 0; i < num_flavors; i++) {
5534                sec_flavor = &res->flavors->flavors[i];
5535                if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5536                        break;
5537
5538                p = xdr_inline_decode(xdr, 4);
5539                if (unlikely(!p))
5540                        return -EIO;
5541                sec_flavor->flavor = be32_to_cpup(p);
5542
5543                if (sec_flavor->flavor == RPC_AUTH_GSS) {
5544                        status = decode_secinfo_gss(xdr, sec_flavor);
5545                        if (status)
5546                                goto out;
5547                }
5548                res->flavors->num_flavors++;
5549        }
5550
5551        status = 0;
5552out:
5553        return status;
5554}
5555
5556static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5557{
5558        int status = decode_op_hdr(xdr, OP_SECINFO);
5559        if (status)
5560                return status;
5561        return decode_secinfo_common(xdr, res);
5562}
5563
5564#if defined(CONFIG_NFS_V4_1)
5565static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5566{
5567        int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5568        if (status)
5569                return status;
5570        return decode_secinfo_common(xdr, res);
5571}
5572
5573static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5574{
5575        __be32 *p;
5576        uint32_t bitmap_words;
5577        unsigned int i;
5578
5579        p = xdr_inline_decode(xdr, 4);
5580        if (!p)
5581                return -EIO;
5582        bitmap_words = be32_to_cpup(p++);
5583        if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5584                return -EIO;
5585        p = xdr_inline_decode(xdr, 4 * bitmap_words);
5586        for (i = 0; i < bitmap_words; i++)
5587                op_map->u.words[i] = be32_to_cpup(p++);
5588
5589        return 0;
5590}
5591
5592static int decode_exchange_id(struct xdr_stream *xdr,
5593                              struct nfs41_exchange_id_res *res)
5594{
5595        __be32 *p;
5596        uint32_t dummy;
5597        char *dummy_str;
5598        int status;
5599        uint32_t impl_id_count;
5600
5601        status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5602        if (status)
5603                return status;
5604
5605        p = xdr_inline_decode(xdr, 8);
5606        if (unlikely(!p))
5607                return -EIO;
5608        xdr_decode_hyper(p, &res->clientid);
5609        p = xdr_inline_decode(xdr, 12);
5610        if (unlikely(!p))
5611                return -EIO;
5612        res->seqid = be32_to_cpup(p++);
5613        res->flags = be32_to_cpup(p++);
5614
5615        res->state_protect.how = be32_to_cpup(p);
5616        switch (res->state_protect.how) {
5617        case SP4_NONE:
5618                break;
5619        case SP4_MACH_CRED:
5620                status = decode_op_map(xdr, &res->state_protect.enforce);
5621                if (status)
5622                        return status;
5623                status = decode_op_map(xdr, &res->state_protect.allow);
5624                if (status)
5625                        return status;
5626                break;
5627        default:
5628                WARN_ON_ONCE(1);
5629                return -EIO;
5630        }
5631
5632        /* server_owner4.so_minor_id */
5633        p = xdr_inline_decode(xdr, 8);
5634        if (unlikely(!p))
5635                return -EIO;
5636        p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5637
5638        /* server_owner4.so_major_id */
5639        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5640        if (unlikely(status))
5641                return status;
5642        memcpy(res->server_owner->major_id, dummy_str, dummy);
5643        res->server_owner->major_id_sz = dummy;
5644
5645        /* server_scope4 */
5646        status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5647        if (unlikely(status))
5648                return status;
5649        memcpy(res->server_scope->server_scope, dummy_str, dummy);
5650        res->server_scope->server_scope_sz = dummy;
5651
5652        /* Implementation Id */
5653        p = xdr_inline_decode(xdr, 4);
5654        if (unlikely(!p))
5655                return -EIO;
5656        impl_id_count = be32_to_cpup(p++);
5657
5658        if (impl_id_count) {
5659                /* nii_domain */
5660                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661                if (unlikely(status))
5662                        return status;
5663                memcpy(res->impl_id->domain, dummy_str, dummy);
5664
5665                /* nii_name */
5666                status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5667                if (unlikely(status))
5668                        return status;
5669                memcpy(res->impl_id->name, dummy_str, dummy);
5670
5671                /* nii_date */
5672                p = xdr_inline_decode(xdr, 12);
5673                if (unlikely(!p))
5674                        return -EIO;
5675                p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5676                res->impl_id->date.nseconds = be32_to_cpup(p);
5677
5678                /* if there's more than one entry, ignore the rest */
5679        }
5680        return 0;
5681}
5682
5683static int decode_chan_attrs(struct xdr_stream *xdr,
5684                             struct nfs4_channel_attrs *attrs)
5685{
5686        __be32 *p;
5687        u32 nr_attrs, val;
5688
5689        p = xdr_inline_decode(xdr, 28);
5690        if (unlikely(!p))
5691                return -EIO;
5692        val = be32_to_cpup(p++);        /* headerpadsz */
5693        if (val)
5694                return -EINVAL;         /* no support for header padding yet */
5695        attrs->max_rqst_sz = be32_to_cpup(p++);
5696        attrs->max_resp_sz = be32_to_cpup(p++);
5697        attrs->max_resp_sz_cached = be32_to_cpup(p++);
5698        attrs->max_ops = be32_to_cpup(p++);
5699        attrs->max_reqs = be32_to_cpup(p++);
5700        nr_attrs = be32_to_cpup(p);
5701        if (unlikely(nr_attrs > 1)) {
5702                printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5703                        "count %u\n", __func__, nr_attrs);
5704                return -EINVAL;
5705        }
5706        if (nr_attrs == 1) {
5707                p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5708                if (unlikely(!p))
5709                        return -EIO;
5710        }
5711        return 0;
5712}
5713
5714static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5715{
5716        return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5717}
5718
5719static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5720                                struct nfs41_bind_conn_to_session_res *res)
5721{
5722        __be32 *p;
5723        int status;
5724
5725        status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5726        if (!status)
5727                status = decode_sessionid(xdr, &res->sessionid);
5728        if (unlikely(status))
5729                return status;
5730
5731        /* dir flags, rdma mode bool */
5732        p = xdr_inline_decode(xdr, 8);
5733        if (unlikely(!p))
5734                return -EIO;
5735
5736        res->dir = be32_to_cpup(p++);
5737        if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5738                return -EIO;
5739        if (be32_to_cpup(p) == 0)
5740                res->use_conn_in_rdma_mode = false;
5741        else
5742                res->use_conn_in_rdma_mode = true;
5743
5744        return 0;
5745}
5746
5747static int decode_create_session(struct xdr_stream *xdr,
5748                                 struct nfs41_create_session_res *res)
5749{
5750        __be32 *p;
5751        int status;
5752
5753        status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5754        if (!status)
5755                status = decode_sessionid(xdr, &res->sessionid);
5756        if (unlikely(status))
5757                return status;
5758
5759        /* seqid, flags */
5760        p = xdr_inline_decode(xdr, 8);
5761        if (unlikely(!p))
5762                return -EIO;
5763        res->seqid = be32_to_cpup(p++);
5764        res->flags = be32_to_cpup(p);
5765
5766        /* Channel attributes */
5767        status = decode_chan_attrs(xdr, &res->fc_attrs);
5768        if (!status)
5769                status = decode_chan_attrs(xdr, &res->bc_attrs);
5770        return status;
5771}
5772
5773static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5774{
5775        return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5776}
5777
5778static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5779{
5780        return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5781}
5782
5783static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5784{
5785        return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5786}
5787#endif /* CONFIG_NFS_V4_1 */
5788
5789static int decode_sequence(struct xdr_stream *xdr,
5790                           struct nfs4_sequence_res *res,
5791                           struct rpc_rqst *rqstp)
5792{
5793#if defined(CONFIG_NFS_V4_1)
5794        struct nfs4_session *session;
5795        struct nfs4_sessionid id;
5796        u32 dummy;
5797        int status;
5798        __be32 *p;
5799
5800        if (res->sr_slot == NULL)
5801                return 0;
5802        if (!res->sr_slot->table->session)
5803                return 0;
5804
5805        status = decode_op_hdr(xdr, OP_SEQUENCE);
5806        if (!status)
5807                status = decode_sessionid(xdr, &id);
5808        if (unlikely(status))
5809                goto out_err;
5810
5811        /*
5812         * If the server returns different values for sessionID, slotID or
5813         * sequence number, the server is looney tunes.
5814         */
5815        status = -EREMOTEIO;
5816        session = res->sr_slot->table->session;
5817
5818        if (memcmp(id.data, session->sess_id.data,
5819                   NFS4_MAX_SESSIONID_LEN)) {
5820                dprintk("%s Invalid session id\n", __func__);
5821                goto out_err;
5822        }
5823
5824        p = xdr_inline_decode(xdr, 20);
5825        if (unlikely(!p))
5826                goto out_overflow;
5827
5828        /* seqid */
5829        dummy = be32_to_cpup(p++);
5830        if (dummy != res->sr_slot->seq_nr) {
5831                dprintk("%s Invalid sequence number\n", __func__);
5832                goto out_err;
5833        }
5834        /* slot id */
5835        dummy = be32_to_cpup(p++);
5836        if (dummy != res->sr_slot->slot_nr) {
5837                dprintk("%s Invalid slot id\n", __func__);
5838                goto out_err;
5839        }
5840        /* highest slot id */
5841        res->sr_highest_slotid = be32_to_cpup(p++);
5842        /* target highest slot id */
5843        res->sr_target_highest_slotid = be32_to_cpup(p++);
5844        /* result flags */
5845        res->sr_status_flags = be32_to_cpup(p);
5846        status = 0;
5847out_err:
5848        res->sr_status = status;
5849        return status;
5850out_overflow:
5851        status = -EIO;
5852        goto out_err;
5853#else  /* CONFIG_NFS_V4_1 */
5854        return 0;
5855#endif /* CONFIG_NFS_V4_1 */
5856}
5857
5858#if defined(CONFIG_NFS_V4_1)
5859static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5860{
5861        stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5862        return decode_stateid(xdr, stateid);
5863}
5864
5865static int decode_getdeviceinfo(struct xdr_stream *xdr,
5866                                struct nfs4_getdeviceinfo_res *res)
5867{
5868        struct pnfs_device *pdev = res->pdev;
5869        __be32 *p;
5870        uint32_t len, type;
5871        int status;
5872
5873        status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5874        if (status) {
5875                if (status == -ETOOSMALL) {
5876                        p = xdr_inline_decode(xdr, 4);
5877                        if (unlikely(!p))
5878                                return -EIO;
5879                        pdev->mincount = be32_to_cpup(p);
5880                        dprintk("%s: Min count too small. mincnt = %u\n",
5881                                __func__, pdev->mincount);
5882                }
5883                return status;
5884        }
5885
5886        p = xdr_inline_decode(xdr, 8);
5887        if (unlikely(!p))
5888                return -EIO;
5889        type = be32_to_cpup(p++);
5890        if (type != pdev->layout_type) {
5891                dprintk("%s: layout mismatch req: %u pdev: %u\n",
5892                        __func__, pdev->layout_type, type);
5893                return -EINVAL;
5894        }
5895        /*
5896         * Get the length of the opaque device_addr4. xdr_read_pages places
5897         * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5898         * and places the remaining xdr data in xdr_buf->tail
5899         */
5900        pdev->mincount = be32_to_cpup(p);
5901        if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5902                return -EIO;
5903
5904        /* Parse notification bitmap, verifying that it is zero. */
5905        p = xdr_inline_decode(xdr, 4);
5906        if (unlikely(!p))
5907                return -EIO;
5908        len = be32_to_cpup(p);
5909        if (len) {
5910                uint32_t i;
5911
5912                p = xdr_inline_decode(xdr, 4 * len);
5913                if (unlikely(!p))
5914                        return -EIO;
5915
5916                res->notification = be32_to_cpup(p++);
5917                for (i = 1; i < len; i++) {
5918                        if (be32_to_cpup(p++)) {
5919                                dprintk("%s: unsupported notification\n",
5920                                        __func__);
5921                                return -EIO;
5922                        }
5923                }
5924        }
5925        return 0;
5926}
5927
5928static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5929                            struct nfs4_layoutget_res *res)
5930{
5931        __be32 *p;
5932        int status;
5933        u32 layout_count;
5934        u32 recvd;
5935
5936        status = decode_op_hdr(xdr, OP_LAYOUTGET);
5937        if (status)
5938                goto out;
5939        p = xdr_inline_decode(xdr, 4);
5940        if (unlikely(!p))
5941                goto out_overflow;
5942        res->return_on_close = be32_to_cpup(p);
5943        decode_layout_stateid(xdr, &res->stateid);
5944        p = xdr_inline_decode(xdr, 4);
5945        if (unlikely(!p))
5946                goto out_overflow;
5947        layout_count = be32_to_cpup(p);
5948        if (!layout_count) {
5949                dprintk("%s: server responded with empty layout array\n",
5950                        __func__);
5951                status = -EINVAL;
5952                goto out;
5953        }
5954
5955        p = xdr_inline_decode(xdr, 28);
5956        if (unlikely(!p))
5957                goto out_overflow;
5958        p = xdr_decode_hyper(p, &res->range.offset);
5959        p = xdr_decode_hyper(p, &res->range.length);
5960        res->range.iomode = be32_to_cpup(p++);
5961        res->type = be32_to_cpup(p++);
5962        res->layoutp->len = be32_to_cpup(p);
5963
5964        dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5965                __func__,
5966                (unsigned long)res->range.offset,
5967                (unsigned long)res->range.length,
5968                res->range.iomode,
5969                res->type,
5970                res->layoutp->len);
5971
5972        recvd = xdr_read_pages(xdr, res->layoutp->len);
5973        if (res->layoutp->len > recvd) {
5974                dprintk("NFS: server cheating in layoutget reply: "
5975                                "layout len %u > recvd %u\n",
5976                                res->layoutp->len, recvd);
5977                status = -EINVAL;
5978                goto out;
5979        }
5980
5981        if (layout_count > 1) {
5982                /* We only handle a length one array at the moment.  Any
5983                 * further entries are just ignored.  Note that this means
5984                 * the client may see a response that is less than the
5985                 * minimum it requested.
5986                 */
5987                dprintk("%s: server responded with %d layouts, dropping tail\n",
5988                        __func__, layout_count);
5989        }
5990
5991out:
5992        res->status = status;
5993        return status;
5994out_overflow:
5995        status = -EIO;
5996        goto out;
5997}
5998
5999static int decode_layoutreturn(struct xdr_stream *xdr,
6000                               struct nfs4_layoutreturn_res *res)

6001{
6002        __be32 *p;
6003        int status;
6004
6005        status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6006        if (status)
6007                return status;
6008        p = xdr_inline_decode(xdr, 4);
6009        if (unlikely(!p))
6010                return -EIO;
6011        res->lrs_present = be32_to_cpup(p);
6012        if (res->lrs_present)
6013                status = decode_layout_stateid(xdr, &res->stateid);
6014        else
6015                nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6016        return status;
6017}
6018
6019static int decode_layoutcommit(struct xdr_stream *xdr,
6020                               struct rpc_rqst *req,
6021                               struct nfs4_layoutcommit_res *res)
6022{
6023        __be32 *p;
6024        __u32 sizechanged;
6025        int status;
6026
6027        status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6028        res->status = status;
6029        if (status)
6030                return status;
6031
6032        p = xdr_inline_decode(xdr, 4);
6033        if (unlikely(!p))
6034                return -EIO;
6035        sizechanged = be32_to_cpup(p);
6036
6037        if (sizechanged) {
6038                /* throw away new size */
6039                p = xdr_inline_decode(xdr, 8);
6040                if (unlikely(!p))
6041                        return -EIO;
6042        }
6043        return 0;
6044}
6045
6046static int decode_test_stateid(struct xdr_stream *xdr,
6047                               struct nfs41_test_stateid_res *res)
6048{
6049        __be32 *p;
6050        int status;
6051        int num_res;
6052
6053        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6054        if (status)
6055                return status;
6056
6057        p = xdr_inline_decode(xdr, 4);
6058        if (unlikely(!p))
6059                return -EIO;
6060        num_res = be32_to_cpup(p++);
6061        if (num_res != 1)
6062                return -EIO;
6063
6064        p = xdr_inline_decode(xdr, 4);
6065        if (unlikely(!p))
6066                return -EIO;
6067        res->status = be32_to_cpup(p++);
6068
6069        return status;
6070}
6071
6072static int decode_free_stateid(struct xdr_stream *xdr,
6073                               struct nfs41_free_stateid_res *res)
6074{
6075        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6076        return res->status;
6077}
6078#else
6079static inline
6080int decode_layoutreturn(struct xdr_stream *xdr,
6081                               struct nfs4_layoutreturn_res *res)
6082{
6083        return 0;
6084}
6085
6086static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6087                            struct nfs4_layoutget_res *res)
6088{
6089        return 0;
6090}
6091
6092#endif /* CONFIG_NFS_V4_1 */
6093
6094/*
6095 * END OF "GENERIC" DECODE ROUTINES.
6096 */
6097
6098/*
6099 * Decode OPEN_DOWNGRADE response
6100 */
6101static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6102                                       struct xdr_stream *xdr,
6103                                       void *data)
6104{
6105        struct nfs_closeres *res = data;
6106        struct compound_hdr hdr;
6107        int status;
6108
6109        status = decode_compound_hdr(xdr, &hdr);
6110        if (status)
6111                goto out;
6112        status = decode_sequence(xdr, &res->seq_res, rqstp);
6113        if (status)
6114                goto out;
6115        status = decode_putfh(xdr);
6116        if (status)
6117                goto out;
6118        if (res->lr_res) {
6119                status = decode_layoutreturn(xdr, res->lr_res);
6120                res->lr_ret = status;
6121                if (status)
6122                        goto out;
6123        }
6124        status = decode_open_downgrade(xdr, res);
6125out:
6126        return status;
6127}
6128
6129/*
6130 * Decode ACCESS response
6131 */
6132static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6133                               void *data)
6134{
6135        struct nfs4_accessres *res = data;
6136        struct compound_hdr hdr;
6137        int status;
6138
6139        status = decode_compound_hdr(xdr, &hdr);
6140        if (status)
6141                goto out;
6142        status = decode_sequence(xdr, &res->seq_res, rqstp);
6143        if (status)
6144                goto out;
6145        status = decode_putfh(xdr);
6146        if (status != 0)
6147                goto out;
6148        status = decode_access(xdr, &res->supported, &res->access);
6149        if (status != 0)
6150                goto out;
6151        if (res->fattr)
6152                decode_getfattr(xdr, res->fattr, res->server);
6153out:
6154        return status;
6155}
6156
6157/*
6158 * Decode LOOKUP response
6159 */
6160static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6161                               void *data)
6162{
6163        struct nfs4_lookup_res *res = data;
6164        struct compound_hdr hdr;
6165        int status;
6166
6167        status = decode_compound_hdr(xdr, &hdr);
6168        if (status)
6169                goto out;
6170        status = decode_sequence(xdr, &res->seq_res, rqstp);
6171        if (status)
6172                goto out;
6173        status = decode_putfh(xdr);
6174        if (status)
6175                goto out;
6176        status = decode_lookup(xdr);
6177        if (status)
6178                goto out;
6179        status = decode_getfh(xdr, res->fh);
6180        if (status)
6181                goto out;
6182        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6183out:
6184        return status;
6185}
6186
6187/*
6188 * Decode LOOKUPP response
6189 */
6190static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6191                void *data)
6192{
6193        struct nfs4_lookupp_res *res = data;
6194        struct compound_hdr hdr;
6195        int status;
6196
6197        status = decode_compound_hdr(xdr, &hdr);
6198        if (status)
6199                goto out;
6200        status = decode_sequence(xdr, &res->seq_res, rqstp);
6201        if (status)
6202                goto out;
6203        status = decode_putfh(xdr);
6204        if (status)
6205                goto out;
6206        status = decode_lookupp(xdr);
6207        if (status)
6208                goto out;
6209        status = decode_getfh(xdr, res->fh);
6210        if (status)
6211                goto out;
6212        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6213out:
6214        return status;
6215}
6216
6217/*
6218 * Decode LOOKUP_ROOT response
6219 */
6220static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6221                                    struct xdr_stream *xdr,
6222                                    void *data)
6223{
6224        struct nfs4_lookup_res *res = data;
6225        struct compound_hdr hdr;
6226        int status;
6227
6228        status = decode_compound_hdr(xdr, &hdr);
6229        if (status)
6230                goto out;
6231        status = decode_sequence(xdr, &res->seq_res, rqstp);
6232        if (status)
6233                goto out;
6234        status = decode_putrootfh(xdr);
6235        if (status)
6236                goto out;
6237        status = decode_getfh(xdr, res->fh);
6238        if (status == 0)
6239                status = decode_getfattr_label(xdr, res->fattr,
6240                                                res->label, res->server);
6241out:
6242        return status;
6243}
6244
6245/*
6246 * Decode REMOVE response
6247 */
6248static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249                               void *data)
6250{
6251        struct nfs_removeres *res = data;
6252        struct compound_hdr hdr;
6253        int status;
6254
6255        status = decode_compound_hdr(xdr, &hdr);
6256        if (status)
6257                goto out;
6258        status = decode_sequence(xdr, &res->seq_res, rqstp);
6259        if (status)
6260                goto out;
6261        status = decode_putfh(xdr);
6262        if (status)
6263                goto out;
6264        status = decode_remove(xdr, &res->cinfo);
6265out:
6266        return status;
6267}
6268
6269/*
6270 * Decode RENAME response
6271 */
6272static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6273                               void *data)
6274{
6275        struct nfs_renameres *res = data;
6276        struct compound_hdr hdr;
6277        int status;
6278
6279        status = decode_compound_hdr(xdr, &hdr);
6280        if (status)
6281                goto out;
6282        status = decode_sequence(xdr, &res->seq_res, rqstp);
6283        if (status)
6284                goto out;
6285        status = decode_putfh(xdr);
6286        if (status)
6287                goto out;
6288        status = decode_savefh(xdr);
6289        if (status)
6290                goto out;
6291        status = decode_putfh(xdr);
6292        if (status)
6293                goto out;
6294        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6295out:
6296        return status;
6297}
6298
6299/*
6300 * Decode LINK response
6301 */
6302static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6303                             void *data)
6304{
6305        struct nfs4_link_res *res = data;
6306        struct compound_hdr hdr;
6307        int status;
6308
6309        status = decode_compound_hdr(xdr, &hdr);
6310        if (status)
6311                goto out;
6312        status = decode_sequence(xdr, &res->seq_res, rqstp);
6313        if (status)
6314                goto out;
6315        status = decode_putfh(xdr);
6316        if (status)
6317                goto out;
6318        status = decode_savefh(xdr);
6319        if (status)
6320                goto out;
6321        status = decode_putfh(xdr);
6322        if (status)
6323                goto out;
6324        status = decode_link(xdr, &res->cinfo);
6325        if (status)
6326                goto out;
6327        /*
6328         * Note order: OP_LINK leaves the directory as the current
6329         *             filehandle.
6330         */
6331        status = decode_restorefh(xdr);
6332        if (status)
6333                goto out;
6334        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6335out:
6336        return status;
6337}
6338
6339/*
6340 * Decode CREATE response
6341 */
6342static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6343                               void *data)
6344{
6345        struct nfs4_create_res *res = data;
6346        struct compound_hdr hdr;
6347        int status;
6348
6349        status = decode_compound_hdr(xdr, &hdr);
6350        if (status)
6351                goto out;
6352        status = decode_sequence(xdr, &res->seq_res, rqstp);
6353        if (status)
6354                goto out;
6355        status = decode_putfh(xdr);
6356        if (status)
6357                goto out;
6358        status = decode_create(xdr, &res->dir_cinfo);
6359        if (status)
6360                goto out;
6361        status = decode_getfh(xdr, res->fh);
6362        if (status)
6363                goto out;
6364        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6365out:
6366        return status;
6367}
6368
6369/*
6370 * Decode SYMLINK response
6371 */
6372static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6373                                void *res)
6374{
6375        return nfs4_xdr_dec_create(rqstp, xdr, res);
6376}
6377
6378/*
6379 * Decode GETATTR response
6380 */
6381static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6382                                void *data)
6383{
6384        struct nfs4_getattr_res *res = data;
6385        struct compound_hdr hdr;
6386        int status;
6387
6388        status = decode_compound_hdr(xdr, &hdr);
6389        if (status)
6390                goto out;
6391        status = decode_sequence(xdr, &res->seq_res, rqstp);
6392        if (status)
6393                goto out;
6394        status = decode_putfh(xdr);
6395        if (status)
6396                goto out;
6397        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6398out:
6399        return status;
6400}
6401
6402/*
6403 * Encode an SETACL request
6404 */
6405static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6406                                const void *data)
6407{
6408        const struct nfs_setaclargs *args = data;
6409        struct compound_hdr hdr = {
6410                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6411        };
6412
6413        encode_compound_hdr(xdr, req, &hdr);
6414        encode_sequence(xdr, &args->seq_args, &hdr);
6415        encode_putfh(xdr, args->fh, &hdr);
6416        encode_setacl(xdr, args, &hdr);
6417        encode_nops(&hdr);
6418}
6419
6420/*
6421 * Decode SETACL response
6422 */
6423static int
6424nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425                    void *data)
6426{
6427        struct nfs_setaclres *res = data;
6428        struct compound_hdr hdr;
6429        int status;
6430
6431        status = decode_compound_hdr(xdr, &hdr);
6432        if (status)
6433                goto out;
6434        status = decode_sequence(xdr, &res->seq_res, rqstp);
6435        if (status)
6436                goto out;
6437        status = decode_putfh(xdr);
6438        if (status)
6439                goto out;
6440        status = decode_setattr(xdr);
6441out:
6442        return status;
6443}
6444
6445/*
6446 * Decode GETACL response
6447 */
6448static int
6449nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450                    void *data)
6451{
6452        struct nfs_getaclres *res = data;
6453        struct compound_hdr hdr;
6454        int status;
6455
6456        if (res->acl_scratch != NULL)
6457                xdr_set_scratch_page(xdr, res->acl_scratch);
6458        status = decode_compound_hdr(xdr, &hdr);
6459        if (status)
6460                goto out;
6461        status = decode_sequence(xdr, &res->seq_res, rqstp);
6462        if (status)
6463                goto out;
6464        status = decode_putfh(xdr);
6465        if (status)
6466                goto out;
6467        status = decode_getacl(xdr, rqstp, res);
6468
6469out:
6470        return status;
6471}
6472
6473/*
6474 * Decode CLOSE response
6475 */
6476static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477                              void *data)
6478{
6479        struct nfs_closeres *res = data;
6480        struct compound_hdr hdr;
6481        int status;
6482
6483        status = decode_compound_hdr(xdr, &hdr);
6484        if (status)
6485                goto out;
6486        status = decode_sequence(xdr, &res->seq_res, rqstp);
6487        if (status)
6488                goto out;
6489        status = decode_putfh(xdr);
6490        if (status)
6491                goto out;
6492        if (res->lr_res) {
6493                status = decode_layoutreturn(xdr, res->lr_res);
6494                res->lr_ret = status;
6495                if (status)
6496                        goto out;
6497        }
6498        if (res->fattr != NULL) {
6499                status = decode_getfattr(xdr, res->fattr, res->server);
6500                if (status != 0)
6501                        goto out;
6502        }
6503        status = decode_close(xdr, res);
6504out:
6505        return status;
6506}
6507
6508/*
6509 * Decode OPEN response
6510 */
6511static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                             void *data)
6513{
6514        struct nfs_openres *res = data;
6515        struct compound_hdr hdr;
6516        int status;
6517
6518        status = decode_compound_hdr(xdr, &hdr);
6519        if (status)
6520                goto out;
6521        status = decode_sequence(xdr, &res->seq_res, rqstp);
6522        if (status)
6523                goto out;
6524        status = decode_putfh(xdr);
6525        if (status)
6526                goto out;
6527        status = decode_open(xdr, res);
6528        if (status)
6529                goto out;
6530        status = decode_getfh(xdr, &res->fh);
6531        if (status)
6532                goto out;
6533        if (res->access_request)
6534                decode_access(xdr, &res->access_supported, &res->access_result);
6535        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6536        if (res->lg_res)
6537                decode_layoutget(xdr, rqstp, res->lg_res);
6538out:
6539        return status;
6540}
6541
6542/*
6543 * Decode OPEN_CONFIRM response
6544 */
6545static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6546                                     struct xdr_stream *xdr,
6547                                     void *data)
6548{
6549        struct nfs_open_confirmres *res = data;
6550        struct compound_hdr hdr;
6551        int status;
6552
6553        status = decode_compound_hdr(xdr, &hdr);
6554        if (status)
6555                goto out;
6556        status = decode_putfh(xdr);
6557        if (status)
6558                goto out;
6559        status = decode_open_confirm(xdr, res);
6560out:
6561        return status;
6562}
6563
6564/*
6565 * Decode OPEN response
6566 */
6567static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6568                                    struct xdr_stream *xdr,
6569                                    void *data)
6570{
6571        struct nfs_openres *res = data;
6572        struct compound_hdr hdr;
6573        int status;
6574
6575        status = decode_compound_hdr(xdr, &hdr);
6576        if (status)
6577                goto out;
6578        status = decode_sequence(xdr, &res->seq_res, rqstp);
6579        if (status)
6580                goto out;
6581        status = decode_putfh(xdr);
6582        if (status)
6583                goto out;
6584        status = decode_open(xdr, res);
6585        if (status)
6586                goto out;
6587        if (res->access_request)
6588                decode_access(xdr, &res->access_supported, &res->access_result);
6589        decode_getfattr(xdr, res->f_attr, res->server);
6590        if (res->lg_res)
6591                decode_layoutget(xdr, rqstp, res->lg_res);
6592out:
6593        return status;
6594}
6595
6596/*
6597 * Decode SETATTR response
6598 */
6599static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6600                                struct xdr_stream *xdr,
6601                                void *data)
6602{
6603        struct nfs_setattrres *res = data;
6604        struct compound_hdr hdr;
6605        int status;
6606
6607        status = decode_compound_hdr(xdr, &hdr);
6608        if (status)
6609                goto out;
6610        status = decode_sequence(xdr, &res->seq_res, rqstp);
6611        if (status)
6612                goto out;
6613        status = decode_putfh(xdr);
6614        if (status)
6615                goto out;
6616        status = decode_setattr(xdr);
6617        if (status)
6618                goto out;
6619        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6620out:
6621        return status;
6622}
6623
6624/*
6625 * Decode LOCK response
6626 */
6627static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6628                             void *data)
6629{
6630        struct nfs_lock_res *res = data;
6631        struct compound_hdr hdr;
6632        int status;
6633
6634        status = decode_compound_hdr(xdr, &hdr);
6635        if (status)
6636                goto out;
6637        status = decode_sequence(xdr, &res->seq_res, rqstp);
6638        if (status)
6639                goto out;
6640        status = decode_putfh(xdr);
6641        if (status)
6642                goto out;
6643        status = decode_lock(xdr, res);
6644out:
6645        return status;
6646}
6647
6648/*
6649 * Decode LOCKT response
6650 */
6651static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6652                              void *data)
6653{
6654        struct nfs_lockt_res *res = data;
6655        struct compound_hdr hdr;
6656        int status;
6657
6658        status = decode_compound_hdr(xdr, &hdr);
6659        if (status)
6660                goto out;
6661        status = decode_sequence(xdr, &res->seq_res, rqstp);
6662        if (status)
6663                goto out;
6664        status = decode_putfh(xdr);
6665        if (status)
6666                goto out;
6667        status = decode_lockt(xdr, res);
6668out:
6669        return status;
6670}
6671
6672/*
6673 * Decode LOCKU response
6674 */
6675static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6676                              void *data)
6677{
6678        struct nfs_locku_res *res = data;
6679        struct compound_hdr hdr;
6680        int status;
6681
6682        status = decode_compound_hdr(xdr, &hdr);
6683        if (status)
6684                goto out;
6685        status = decode_sequence(xdr, &res->seq_res, rqstp);
6686        if (status)
6687                goto out;
6688        status = decode_putfh(xdr);
6689        if (status)
6690                goto out;
6691        status = decode_locku(xdr, res);
6692out:
6693        return status;
6694}
6695
6696static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6697                                          struct xdr_stream *xdr, void *dummy)
6698{
6699        struct compound_hdr hdr;
6700        int status;
6701
6702        status = decode_compound_hdr(xdr, &hdr);
6703        if (!status)
6704                status = decode_release_lockowner(xdr);
6705        return status;
6706}
6707
6708/*
6709 * Decode READLINK response
6710 */
6711static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6712                                 struct xdr_stream *xdr,
6713                                 void *data)
6714{
6715        struct nfs4_readlink_res *res = data;
6716        struct compound_hdr hdr;
6717        int status;
6718
6719        status = decode_compound_hdr(xdr, &hdr);
6720        if (status)
6721                goto out;
6722        status = decode_sequence(xdr, &res->seq_res, rqstp);
6723        if (status)
6724                goto out;
6725        status = decode_putfh(xdr);
6726        if (status)
6727                goto out;
6728        status = decode_readlink(xdr, rqstp);
6729out:
6730        return status;
6731}
6732
6733/*
6734 * Decode READDIR response
6735 */
6736static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6737                                void *data)
6738{
6739        struct nfs4_readdir_res *res = data;
6740        struct compound_hdr hdr;
6741        int status;
6742
6743        status = decode_compound_hdr(xdr, &hdr);
6744        if (status)
6745                goto out;
6746        status = decode_sequence(xdr, &res->seq_res, rqstp);
6747        if (status)
6748                goto out;
6749        status = decode_putfh(xdr);
6750        if (status)
6751                goto out;
6752        status = decode_readdir(xdr, rqstp, res);
6753out:
6754        return status;
6755}
6756
6757/*
6758 * Decode Read response
6759 */
6760static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6761                             void *data)
6762{
6763        struct nfs_pgio_res *res = data;
6764        struct compound_hdr hdr;
6765        int status;
6766
6767        status = decode_compound_hdr(xdr, &hdr);
6768        res->op_status = hdr.status;
6769        if (status)
6770                goto out;
6771        status = decode_sequence(xdr, &res->seq_res, rqstp);
6772        if (status)
6773                goto out;
6774        status = decode_putfh(xdr);
6775        if (status)
6776                goto out;
6777        status = decode_read(xdr, rqstp, res);
6778        if (!status)
6779                status = res->count;
6780out:
6781        return status;
6782}
6783
6784/*
6785 * Decode WRITE response
6786 */
6787static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6788                              void *data)
6789{
6790        struct nfs_pgio_res *res = data;
6791        struct compound_hdr hdr;
6792        int status;
6793
6794        status = decode_compound_hdr(xdr, &hdr);
6795        res->op_status = hdr.status;
6796        if (status)
6797                goto out;
6798        status = decode_sequence(xdr, &res->seq_res, rqstp);
6799        if (status)
6800                goto out;
6801        status = decode_putfh(xdr);
6802        if (status)
6803                goto out;
6804        status = decode_write(xdr, res);
6805        if (status)
6806                goto out;
6807        if (res->fattr)
6808                decode_getfattr(xdr, res->fattr, res->server);
6809        if (!status)
6810                status = res->count;
6811out:
6812        return status;
6813}
6814
6815/*
6816 * Decode COMMIT response
6817 */
6818static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6819                               void *data)
6820{
6821        struct nfs_commitres *res = data;
6822        struct compound_hdr hdr;
6823        int status;
6824
6825        status = decode_compound_hdr(xdr, &hdr);
6826        res->op_status = hdr.status;
6827        if (status)
6828                goto out;
6829        status = decode_sequence(xdr, &res->seq_res, rqstp);
6830        if (status)
6831                goto out;
6832        status = decode_putfh(xdr);
6833        if (status)
6834                goto out;
6835        status = decode_commit(xdr, res);
6836out:
6837        return status;
6838}
6839
6840/*
6841 * Decode FSINFO response
6842 */
6843static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6844                               void *data)
6845{
6846        struct nfs4_fsinfo_res *res = data;
6847        struct compound_hdr hdr;
6848        int status;
6849
6850        status = decode_compound_hdr(xdr, &hdr);
6851        if (!status)
6852                status = decode_sequence(xdr, &res->seq_res, req);
6853        if (!status)
6854                status = decode_putfh(xdr);
6855        if (!status)
6856                status = decode_fsinfo(xdr, res->fsinfo);
6857        return status;
6858}
6859
6860/*
6861 * Decode PATHCONF response
6862 */
6863static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6864                                 void *data)
6865{
6866        struct nfs4_pathconf_res *res = data;
6867        struct compound_hdr hdr;
6868        int status;
6869
6870        status = decode_compound_hdr(xdr, &hdr);
6871        if (!status)
6872                status = decode_sequence(xdr, &res->seq_res, req);
6873        if (!status)
6874                status = decode_putfh(xdr);
6875        if (!status)
6876                status = decode_pathconf(xdr, res->pathconf);
6877        return status;
6878}
6879
6880/*
6881 * Decode STATFS response
6882 */
6883static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6884                               void *data)
6885{
6886        struct nfs4_statfs_res *res = data;
6887        struct compound_hdr hdr;
6888        int status;
6889
6890        status = decode_compound_hdr(xdr, &hdr);
6891        if (!status)
6892                status = decode_sequence(xdr, &res->seq_res, req);
6893        if (!status)
6894                status = decode_putfh(xdr);
6895        if (!status)
6896                status = decode_statfs(xdr, res->fsstat);
6897        return status;
6898}
6899
6900/*
6901 * Decode GETATTR_BITMAP response
6902 */
6903static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6904                                    struct xdr_stream *xdr,
6905                                    void *data)
6906{
6907        struct nfs4_server_caps_res *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, req);
6915        if (status)
6916                goto out;
6917        status = decode_putfh(xdr);
6918        if (status)
6919                goto out;
6920        status = decode_server_caps(xdr, res);
6921out:
6922        return status;
6923}
6924
6925/*
6926 * Decode RENEW response
6927 */
6928static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6929                              void *__unused)
6930{
6931        struct compound_hdr hdr;
6932        int status;
6933
6934        status = decode_compound_hdr(xdr, &hdr);
6935        if (!status)
6936                status = decode_renew(xdr);
6937        return status;
6938}
6939
6940/*
6941 * Decode SETCLIENTID response
6942 */
6943static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6944                                    struct xdr_stream *xdr,
6945                                    void *data)
6946{
6947        struct nfs4_setclientid_res *res = data;
6948        struct compound_hdr hdr;
6949        int status;
6950
6951        status = decode_compound_hdr(xdr, &hdr);
6952        if (!status)
6953                status = decode_setclientid(xdr, res);
6954        return status;
6955}
6956
6957/*
6958 * Decode SETCLIENTID_CONFIRM response
6959 */
6960static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6961                                            struct xdr_stream *xdr,
6962                                            void *data)
6963{
6964        struct compound_hdr hdr;
6965        int status;
6966
6967        status = decode_compound_hdr(xdr, &hdr);
6968        if (!status)
6969                status = decode_setclientid_confirm(xdr);
6970        return status;
6971}
6972
6973/*
6974 * Decode DELEGRETURN response
6975 */
6976static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6977                                    struct xdr_stream *xdr,
6978                                    void *data)
6979{
6980        struct nfs4_delegreturnres *res = data;
6981        struct compound_hdr hdr;
6982        int status;
6983
6984        status = decode_compound_hdr(xdr, &hdr);
6985        if (status)
6986                goto out;
6987        status = decode_sequence(xdr, &res->seq_res, rqstp);
6988        if (status)
6989                goto out;
6990        status = decode_putfh(xdr);
6991        if (status != 0)
6992                goto out;
6993        if (res->lr_res) {
6994                status = decode_layoutreturn(xdr, res->lr_res);
6995                res->lr_ret = status;
6996                if (status)
6997                        goto out;
6998        }
6999        if (res->fattr) {
7000                status = decode_getfattr(xdr, res->fattr, res->server);

7001                if (status != 0)
7002                        goto out;
7003        }
7004        status = decode_delegreturn(xdr);
7005out:
7006        return status;
7007}
7008
7009/*
7010 * Decode FS_LOCATIONS response
7011 */
7012static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7013                                     struct xdr_stream *xdr,
7014                                     void *data)
7015{
7016        struct nfs4_fs_locations_res *res = data;
7017        struct compound_hdr hdr;
7018        int status;
7019
7020        status = decode_compound_hdr(xdr, &hdr);
7021        if (status)
7022                goto out;
7023        status = decode_sequence(xdr, &res->seq_res, req);
7024        if (status)
7025                goto out;
7026        status = decode_putfh(xdr);
7027        if (status)
7028                goto out;
7029        if (res->migration) {
7030                xdr_enter_page(xdr, PAGE_SIZE);
7031                status = decode_getfattr_generic(xdr,
7032                                        &res->fs_locations->fattr,
7033                                         NULL, res->fs_locations,
7034                                         NULL, res->fs_locations->server);
7035                if (status)
7036                        goto out;
7037                if (res->renew)
7038                        status = decode_renew(xdr);
7039        } else {
7040                status = decode_lookup(xdr);
7041                if (status)
7042                        goto out;
7043                xdr_enter_page(xdr, PAGE_SIZE);
7044                status = decode_getfattr_generic(xdr,
7045                                        &res->fs_locations->fattr,
7046                                         NULL, res->fs_locations,
7047                                         NULL, res->fs_locations->server);
7048        }
7049out:
7050        return status;
7051}
7052
7053/*
7054 * Decode SECINFO response
7055 */
7056static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7057                                struct xdr_stream *xdr,
7058                                void *data)
7059{
7060        struct nfs4_secinfo_res *res = data;
7061        struct compound_hdr hdr;
7062        int status;
7063
7064        status = decode_compound_hdr(xdr, &hdr);
7065        if (status)
7066                goto out;
7067        status = decode_sequence(xdr, &res->seq_res, rqstp);
7068        if (status)
7069                goto out;
7070        status = decode_putfh(xdr);
7071        if (status)
7072                goto out;
7073        status = decode_secinfo(xdr, res);
7074out:
7075        return status;
7076}
7077
7078/*
7079 * Decode FSID_PRESENT response
7080 */
7081static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7082                                     struct xdr_stream *xdr,
7083                                     void *data)
7084{
7085        struct nfs4_fsid_present_res *res = data;
7086        struct compound_hdr hdr;
7087        int status;
7088
7089        status = decode_compound_hdr(xdr, &hdr);
7090        if (status)
7091                goto out;
7092        status = decode_sequence(xdr, &res->seq_res, rqstp);
7093        if (status)
7094                goto out;
7095        status = decode_putfh(xdr);
7096        if (status)
7097                goto out;
7098        status = decode_getfh(xdr, res->fh);
7099        if (status)
7100                goto out;
7101        if (res->renew)
7102                status = decode_renew(xdr);
7103out:
7104        return status;
7105}
7106
7107#if defined(CONFIG_NFS_V4_1)
7108/*
7109 * Decode BIND_CONN_TO_SESSION response
7110 */
7111static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7112                                        struct xdr_stream *xdr,
7113                                        void *res)
7114{
7115        struct compound_hdr hdr;
7116        int status;
7117
7118        status = decode_compound_hdr(xdr, &hdr);
7119        if (!status)
7120                status = decode_bind_conn_to_session(xdr, res);
7121        return status;
7122}
7123
7124/*
7125 * Decode EXCHANGE_ID response
7126 */
7127static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7128                                    struct xdr_stream *xdr,
7129                                    void *res)
7130{
7131        struct compound_hdr hdr;
7132        int status;
7133
7134        status = decode_compound_hdr(xdr, &hdr);
7135        if (!status)
7136                status = decode_exchange_id(xdr, res);
7137        return status;
7138}
7139
7140/*
7141 * Decode CREATE_SESSION response
7142 */
7143static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7144                                       struct xdr_stream *xdr,
7145                                       void *res)
7146{
7147        struct compound_hdr hdr;
7148        int status;
7149
7150        status = decode_compound_hdr(xdr, &hdr);
7151        if (!status)
7152                status = decode_create_session(xdr, res);
7153        return status;
7154}
7155
7156/*
7157 * Decode DESTROY_SESSION response
7158 */
7159static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7160                                        struct xdr_stream *xdr,
7161                                        void *res)
7162{
7163        struct compound_hdr hdr;
7164        int status;
7165
7166        status = decode_compound_hdr(xdr, &hdr);
7167        if (!status)
7168                status = decode_destroy_session(xdr, res);
7169        return status;
7170}
7171
7172/*
7173 * Decode DESTROY_CLIENTID response
7174 */
7175static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7176                                        struct xdr_stream *xdr,
7177                                        void *res)
7178{
7179        struct compound_hdr hdr;
7180        int status;
7181
7182        status = decode_compound_hdr(xdr, &hdr);
7183        if (!status)
7184                status = decode_destroy_clientid(xdr, res);
7185        return status;
7186}
7187
7188/*
7189 * Decode SEQUENCE response
7190 */
7191static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7192                                 struct xdr_stream *xdr,
7193                                 void *res)
7194{
7195        struct compound_hdr hdr;
7196        int status;
7197
7198        status = decode_compound_hdr(xdr, &hdr);
7199        if (!status)
7200                status = decode_sequence(xdr, res, rqstp);
7201        return status;
7202}
7203
7204#endif
7205
7206/*
7207 * Decode GET_LEASE_TIME response
7208 */
7209static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7210                                       struct xdr_stream *xdr,
7211                                       void *data)
7212{
7213        struct nfs4_get_lease_time_res *res = data;
7214        struct compound_hdr hdr;
7215        int status;
7216
7217        status = decode_compound_hdr(xdr, &hdr);
7218        if (!status)
7219                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7220        if (!status)
7221                status = decode_putrootfh(xdr);
7222        if (!status)
7223                status = decode_fsinfo(xdr, res->lr_fsinfo);
7224        return status;
7225}
7226
7227#ifdef CONFIG_NFS_V4_1
7228
7229/*
7230 * Decode RECLAIM_COMPLETE response
7231 */
7232static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7233                                         struct xdr_stream *xdr,
7234                                         void *data)
7235{
7236        struct nfs41_reclaim_complete_res *res = data;
7237        struct compound_hdr hdr;
7238        int status;
7239
7240        status = decode_compound_hdr(xdr, &hdr);
7241        if (!status)
7242                status = decode_sequence(xdr, &res->seq_res, rqstp);
7243        if (!status)
7244                status = decode_reclaim_complete(xdr, NULL);
7245        return status;
7246}
7247
7248/*
7249 * Decode GETDEVINFO response
7250 */
7251static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7252                                      struct xdr_stream *xdr,
7253                                      void *data)
7254{
7255        struct nfs4_getdeviceinfo_res *res = data;
7256        struct compound_hdr hdr;
7257        int status;
7258
7259        status = decode_compound_hdr(xdr, &hdr);
7260        if (status != 0)
7261                goto out;
7262        status = decode_sequence(xdr, &res->seq_res, rqstp);
7263        if (status != 0)
7264                goto out;
7265        status = decode_getdeviceinfo(xdr, res);
7266out:
7267        return status;
7268}
7269
7270/*
7271 * Decode LAYOUTGET response
7272 */
7273static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7274                                  struct xdr_stream *xdr,
7275                                  void *data)
7276{
7277        struct nfs4_layoutget_res *res = data;
7278        struct compound_hdr hdr;
7279        int status;
7280
7281        status = decode_compound_hdr(xdr, &hdr);
7282        if (status)
7283                goto out;
7284        status = decode_sequence(xdr, &res->seq_res, rqstp);
7285        if (status)
7286                goto out;
7287        status = decode_putfh(xdr);
7288        if (status)
7289                goto out;
7290        status = decode_layoutget(xdr, rqstp, res);
7291out:
7292        return status;
7293}
7294
7295/*
7296 * Decode LAYOUTRETURN response
7297 */
7298static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7299                                     struct xdr_stream *xdr,
7300                                     void *data)
7301{
7302        struct nfs4_layoutreturn_res *res = data;
7303        struct compound_hdr hdr;
7304        int status;
7305
7306        status = decode_compound_hdr(xdr, &hdr);
7307        if (status)
7308                goto out;
7309        status = decode_sequence(xdr, &res->seq_res, rqstp);
7310        if (status)
7311                goto out;
7312        status = decode_putfh(xdr);
7313        if (status)
7314                goto out;
7315        status = decode_layoutreturn(xdr, res);
7316out:
7317        return status;
7318}
7319
7320/*
7321 * Decode LAYOUTCOMMIT response
7322 */
7323static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7324                                     struct xdr_stream *xdr,
7325                                     void *data)
7326{
7327        struct nfs4_layoutcommit_res *res = data;
7328        struct compound_hdr hdr;
7329        int status;
7330
7331        status = decode_compound_hdr(xdr, &hdr);
7332        if (status)
7333                goto out;
7334        status = decode_sequence(xdr, &res->seq_res, rqstp);
7335        if (status)
7336                goto out;
7337        status = decode_putfh(xdr);
7338        if (status)
7339                goto out;
7340        status = decode_layoutcommit(xdr, rqstp, res);
7341        if (status)
7342                goto out;
7343        decode_getfattr(xdr, res->fattr, res->server);
7344out:
7345        return status;
7346}
7347
7348/*
7349 * Decode SECINFO_NO_NAME response
7350 */
7351static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7352                                        struct xdr_stream *xdr,
7353                                        void *data)
7354{
7355        struct nfs4_secinfo_res *res = data;
7356        struct compound_hdr hdr;
7357        int status;
7358
7359        status = decode_compound_hdr(xdr, &hdr);
7360        if (status)
7361                goto out;
7362        status = decode_sequence(xdr, &res->seq_res, rqstp);
7363        if (status)
7364                goto out;
7365        status = decode_putrootfh(xdr);
7366        if (status)
7367                goto out;
7368        status = decode_secinfo_no_name(xdr, res);
7369out:
7370        return status;
7371}
7372
7373/*
7374 * Decode TEST_STATEID response
7375 */
7376static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7377                                     struct xdr_stream *xdr,
7378                                     void *data)
7379{
7380        struct nfs41_test_stateid_res *res = data;
7381        struct compound_hdr hdr;
7382        int status;
7383
7384        status = decode_compound_hdr(xdr, &hdr);
7385        if (status)
7386                goto out;
7387        status = decode_sequence(xdr, &res->seq_res, rqstp);
7388        if (status)
7389                goto out;
7390        status = decode_test_stateid(xdr, res);
7391out:
7392        return status;
7393}
7394
7395/*
7396 * Decode FREE_STATEID response
7397 */
7398static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7399                                     struct xdr_stream *xdr,
7400                                     void *data)
7401{
7402        struct nfs41_free_stateid_res *res = data;
7403        struct compound_hdr hdr;
7404        int status;
7405
7406        status = decode_compound_hdr(xdr, &hdr);
7407        if (status)
7408                goto out;
7409        status = decode_sequence(xdr, &res->seq_res, rqstp);
7410        if (status)
7411                goto out;
7412        status = decode_free_stateid(xdr, res);
7413out:
7414        return status;
7415}
7416#endif /* CONFIG_NFS_V4_1 */
7417
7418/**
7419 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7420 *                      the local page cache.
7421 * @xdr: XDR stream where entry resides
7422 * @entry: buffer to fill in with entry data
7423 * @plus: boolean indicating whether this should be a readdirplus entry
7424 *
7425 * Returns zero if successful, otherwise a negative errno value is
7426 * returned.
7427 *
7428 * This function is not invoked during READDIR reply decoding, but
7429 * rather whenever an application invokes the getdents(2) system call
7430 * on a directory already in our cache.
7431 */
7432int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7433                       bool plus)
7434{
7435        unsigned int savep;
7436        uint32_t bitmap[3] = {0};
7437        uint32_t len;
7438        uint64_t new_cookie;
7439        __be32 *p = xdr_inline_decode(xdr, 4);
7440        if (unlikely(!p))
7441                return -EAGAIN;
7442        if (*p == xdr_zero) {
7443                p = xdr_inline_decode(xdr, 4);
7444                if (unlikely(!p))
7445                        return -EAGAIN;
7446                if (*p == xdr_zero)
7447                        return -EAGAIN;
7448                entry->eof = 1;
7449                return -EBADCOOKIE;
7450        }
7451
7452        p = xdr_inline_decode(xdr, 12);
7453        if (unlikely(!p))
7454                return -EAGAIN;
7455        p = xdr_decode_hyper(p, &new_cookie);
7456        entry->len = be32_to_cpup(p);
7457
7458        p = xdr_inline_decode(xdr, entry->len);
7459        if (unlikely(!p))
7460                return -EAGAIN;
7461        entry->name = (const char *) p;
7462
7463        /*
7464         * In case the server doesn't return an inode number,
7465         * we fake one here.  (We don't use inode number 0,
7466         * since glibc seems to choke on it...)
7467         */
7468        entry->ino = 1;
7469        entry->fattr->valid = 0;
7470
7471        if (decode_attr_bitmap(xdr, bitmap) < 0)
7472                return -EAGAIN;
7473
7474        if (decode_attr_length(xdr, &len, &savep) < 0)
7475                return -EAGAIN;
7476
7477        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7478                        NULL, entry->label, entry->server) < 0)
7479                return -EAGAIN;
7480        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7481                entry->ino = entry->fattr->mounted_on_fileid;
7482        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7483                entry->ino = entry->fattr->fileid;
7484
7485        entry->d_type = DT_UNKNOWN;
7486        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7487                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7488
7489        entry->prev_cookie = entry->cookie;
7490        entry->cookie = new_cookie;
7491
7492        return 0;
7493}
7494
7495/*
7496 * We need to translate between nfs status return values and
7497 * the local errno values which may not be the same.
7498 */
7499static struct {
7500        int stat;
7501        int errno;
7502} nfs_errtbl[] = {
7503        { NFS4_OK,              0               },
7504        { NFS4ERR_PERM,         -EPERM          },
7505        { NFS4ERR_NOENT,        -ENOENT         },
7506        { NFS4ERR_IO,           -errno_NFSERR_IO},
7507        { NFS4ERR_NXIO,         -ENXIO          },
7508        { NFS4ERR_ACCESS,       -EACCES         },
7509        { NFS4ERR_EXIST,        -EEXIST         },
7510        { NFS4ERR_XDEV,         -EXDEV          },
7511        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7512        { NFS4ERR_ISDIR,        -EISDIR         },
7513        { NFS4ERR_INVAL,        -EINVAL         },
7514        { NFS4ERR_FBIG,         -EFBIG          },
7515        { NFS4ERR_NOSPC,        -ENOSPC         },
7516        { NFS4ERR_ROFS,         -EROFS          },
7517        { NFS4ERR_MLINK,        -EMLINK         },
7518        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7519        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7520        { NFS4ERR_DQUOT,        -EDQUOT         },
7521        { NFS4ERR_STALE,        -ESTALE         },
7522        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7523        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7524        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7525        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7526        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7527        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7528        { NFS4ERR_LOCKED,       -EAGAIN         },
7529        { NFS4ERR_SYMLINK,      -ELOOP          },
7530        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7531        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7532        { NFS4ERR_NOXATTR,      -ENODATA        },
7533        { NFS4ERR_XATTR2BIG,    -E2BIG          },
7534        { -1,                   -EIO            }
7535};
7536
7537/*
7538 * Convert an NFS error code to a local one.
7539 * This one is used jointly by NFSv2 and NFSv3.
7540 */
7541static int
7542nfs4_stat_to_errno(int stat)
7543{
7544        int i;
7545        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7546                if (nfs_errtbl[i].stat == stat)
7547                        return nfs_errtbl[i].errno;
7548        }
7549        if (stat <= 10000 || stat > 10100) {
7550                /* The server is looney tunes. */
7551                return -EREMOTEIO;
7552        }
7553        /* If we cannot translate the error, the recovery routines should
7554         * handle it.
7555         * Note: remaining NFSv4 error codes have values > 10000, so should
7556         * not conflict with native Linux error codes.
7557         */
7558        return -stat;
7559}
7560
7561#ifdef CONFIG_NFS_V4_2
7562#include "nfs42xdr.c"
7563#endif /* CONFIG_NFS_V4_2 */
7564
7565#define PROC(proc, argtype, restype)                            \
7566[NFSPROC4_CLNT_##proc] = {                                      \
7567        .p_proc   = NFSPROC4_COMPOUND,                          \
7568        .p_encode = nfs4_xdr_##argtype,                         \
7569        .p_decode = nfs4_xdr_##restype,                         \
7570        .p_arglen = NFS4_##argtype##_sz,                        \
7571        .p_replen = NFS4_##restype##_sz,                        \
7572        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7573        .p_name   = #proc,                                      \
7574}
7575
7576#define STUB(proc)              \
7577[NFSPROC4_CLNT_##proc] = {      \
7578        .p_name = #proc,        \
7579}
7580
7581#if defined(CONFIG_NFS_V4_1)
7582#define PROC41(proc, argtype, restype)                          \
7583        PROC(proc, argtype, restype)
7584#else
7585#define PROC41(proc, argtype, restype)                          \
7586        STUB(proc)
7587#endif
7588
7589#if defined(CONFIG_NFS_V4_2)
7590#define PROC42(proc, argtype, restype)                          \
7591        PROC(proc, argtype, restype)
7592#else
7593#define PROC42(proc, argtype, restype)                          \
7594        STUB(proc)
7595#endif
7596
7597const struct rpc_procinfo nfs4_procedures[] = {
7598        PROC(READ,              enc_read,               dec_read),
7599        PROC(WRITE,             enc_write,              dec_write),
7600        PROC(COMMIT,            enc_commit,             dec_commit),
7601        PROC(OPEN,              enc_open,               dec_open),
7602        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7603        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7604        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7605        PROC(CLOSE,             enc_close,              dec_close),
7606        PROC(SETATTR,           enc_setattr,            dec_setattr),
7607        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7608        PROC(RENEW,             enc_renew,              dec_renew),
7609        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7610        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7611        PROC(LOCK,              enc_lock,               dec_lock),
7612        PROC(LOCKT,             enc_lockt,              dec_lockt),
7613        PROC(LOCKU,             enc_locku,              dec_locku),
7614        PROC(ACCESS,            enc_access,             dec_access),
7615        PROC(GETATTR,           enc_getattr,            dec_getattr),
7616        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7617        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7618        PROC(REMOVE,            enc_remove,             dec_remove),
7619        PROC(RENAME,            enc_rename,             dec_rename),
7620        PROC(LINK,              enc_link,               dec_link),
7621        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7622        PROC(CREATE,            enc_create,             dec_create),
7623        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7624        PROC(STATFS,            enc_statfs,             dec_statfs),
7625        PROC(READLINK,          enc_readlink,           dec_readlink),
7626        PROC(READDIR,           enc_readdir,            dec_readdir),
7627        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7628        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7629        PROC(GETACL,            enc_getacl,             dec_getacl),
7630        PROC(SETACL,            enc_setacl,             dec_setacl),
7631        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7632        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7633        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7634        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7635        PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7636        PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7637        PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7638        PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7639        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7640        PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7641        PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7642        PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7643        PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7644        PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7645        PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7646        PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7647        PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7648        STUB(GETDEVICELIST),
7649        PROC41(BIND_CONN_TO_SESSION,
7650                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7651        PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7652        PROC42(SEEK,            enc_seek,               dec_seek),
7653        PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7654        PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7655        PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7656        PROC42(CLONE,           enc_clone,              dec_clone),
7657        PROC42(COPY,            enc_copy,               dec_copy),
7658        PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7659        PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7660        PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7661        PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7662        PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7663        PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7664        PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7665        PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7666        PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7667};
7668
7669static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7670const struct rpc_version nfs_version4 = {
7671        .number                 = 4,
7672        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7673        .procs                  = nfs4_procedures,
7674        .counts                 = nfs_version4_counts,
7675};
7676