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

1001        while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1002                len--;
1003        for (i = len; i-- > 0;) {
1004                tmp = bitmap[i] & mask[i];
1005                res[i] = tmp;
1006        }
1007        return len;
1008}
1009
1010static void encode_nfs4_seqid(struct xdr_stream *xdr,
1011                const struct nfs_seqid *seqid)
1012{
1013        if (seqid != NULL)
1014                encode_uint32(xdr, seqid->sequence->counter);
1015        else
1016                encode_uint32(xdr, 0);
1017}
1018
1019static void encode_compound_hdr(struct xdr_stream *xdr,
1020                                struct rpc_rqst *req,
1021                                struct compound_hdr *hdr)
1022{
1023        __be32 *p;
1024
1025        /* initialize running count of expected bytes in reply.
1026         * NOTE: the replied tag SHOULD be the same is the one sent,
1027         * but this is not required as a MUST for the server to do so. */
1028        hdr->replen = 3 + hdr->taglen;
1029
1030        WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1031        encode_string(xdr, hdr->taglen, hdr->tag);
1032        p = reserve_space(xdr, 8);
1033        *p++ = cpu_to_be32(hdr->minorversion);
1034        hdr->nops_p = p;
1035        *p = cpu_to_be32(hdr->nops);
1036}
1037
1038static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1039                uint32_t replen,
1040                struct compound_hdr *hdr)
1041{
1042        encode_uint32(xdr, op);
1043        hdr->nops++;
1044        hdr->replen += replen;
1045}
1046
1047static void encode_nops(struct compound_hdr *hdr)
1048{
1049        WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1050        *hdr->nops_p = htonl(hdr->nops);
1051}
1052
1053static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1054{
1055        encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1056}
1057
1058static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1059{
1060        encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1061}
1062
1063static __be32 *
1064xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1065{
1066        p = xdr_encode_hyper(p, t->tv_sec);
1067        *p++ = cpu_to_be32(t->tv_nsec);
1068        return p;
1069}
1070
1071static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1072                                const struct nfs4_label *label,
1073                                const umode_t *umask,
1074                                const struct nfs_server *server,
1075                                const uint32_t attrmask[])
1076{
1077        char owner_name[IDMAP_NAMESZ];
1078        char owner_group[IDMAP_NAMESZ];
1079        int owner_namelen = 0;
1080        int owner_grouplen = 0;
1081        __be32 *p;
1082        uint32_t len = 0;
1083        uint32_t bmval[3] = { 0 };
1084
1085        /*
1086         * We reserve enough space to write the entire attribute buffer at once.
1087         */
1088        if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1089                bmval[0] |= FATTR4_WORD0_SIZE;
1090                len += 8;
1091        }
1092        if (iap->ia_valid & ATTR_MODE) {
1093                if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1094                        bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1095                        len += 8;
1096                } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1097                        bmval[1] |= FATTR4_WORD1_MODE;
1098                        len += 4;
1099                }
1100        }
1101        if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1102                owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1103                if (owner_namelen < 0) {
1104                        dprintk("nfs: couldn't resolve uid %d to string\n",
1105                                        from_kuid(&init_user_ns, iap->ia_uid));
1106                        /* XXX */
1107                        strcpy(owner_name, "nobody");
1108                        owner_namelen = sizeof("nobody") - 1;
1109                        /* goto out; */
1110                }
1111                bmval[1] |= FATTR4_WORD1_OWNER;
1112                len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1113        }
1114        if ((iap->ia_valid & ATTR_GID) &&
1115           (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1116                owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1117                if (owner_grouplen < 0) {
1118                        dprintk("nfs: couldn't resolve gid %d to string\n",
1119                                        from_kgid(&init_user_ns, iap->ia_gid));
1120                        strcpy(owner_group, "nobody");
1121                        owner_grouplen = sizeof("nobody") - 1;
1122                        /* goto out; */
1123                }
1124                bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1125                len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1126        }
1127        if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1128                if (iap->ia_valid & ATTR_ATIME_SET) {
1129                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1130                        len += 4 + (nfstime4_maxsz << 2);
1131                } else if (iap->ia_valid & ATTR_ATIME) {
1132                        bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1133                        len += 4;
1134                }
1135        }
1136        if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1137                if (iap->ia_valid & ATTR_MTIME_SET) {
1138                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1139                        len += 4 + (nfstime4_maxsz << 2);
1140                } else if (iap->ia_valid & ATTR_MTIME) {
1141                        bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1142                        len += 4;
1143                }
1144        }
1145
1146        if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1147                len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1148                bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1149        }
1150
1151        xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1152        xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1153
1154        if (bmval[0] & FATTR4_WORD0_SIZE)
1155                p = xdr_encode_hyper(p, iap->ia_size);
1156        if (bmval[1] & FATTR4_WORD1_MODE)
1157                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1158        if (bmval[1] & FATTR4_WORD1_OWNER)
1159                p = xdr_encode_opaque(p, owner_name, owner_namelen);
1160        if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1161                p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1162        if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1163                if (iap->ia_valid & ATTR_ATIME_SET) {
1164                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1165                        p = xdr_encode_nfstime4(p, &iap->ia_atime);
1166                } else
1167                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168        }
1169        if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170                if (iap->ia_valid & ATTR_MTIME_SET) {
1171                        *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172                        p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1173                } else
1174                        *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1175        }
1176        if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1177                *p++ = cpu_to_be32(label->lfs);
1178                *p++ = cpu_to_be32(label->pi);
1179                *p++ = cpu_to_be32(label->len);
1180                p = xdr_encode_opaque_fixed(p, label->label, label->len);
1181        }
1182        if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1183                *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1184                *p++ = cpu_to_be32(*umask);
1185        }
1186
1187/* out: */
1188}
1189
1190static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1191{
1192        encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1193        encode_uint32(xdr, access);
1194}
1195
1196static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1197{
1198        encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1199        encode_nfs4_seqid(xdr, arg->seqid);
1200        encode_nfs4_stateid(xdr, &arg->stateid);
1201}
1202
1203static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1204{
1205        __be32 *p;
1206
1207        encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1208        p = reserve_space(xdr, 12);
1209        p = xdr_encode_hyper(p, args->offset);
1210        *p = cpu_to_be32(args->count);
1211}
1212
1213static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1214{
1215        __be32 *p;
1216
1217        encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1218        encode_uint32(xdr, create->ftype);
1219
1220        switch (create->ftype) {
1221        case NF4LNK:
1222                p = reserve_space(xdr, 4);
1223                *p = cpu_to_be32(create->u.symlink.len);
1224                xdr_write_pages(xdr, create->u.symlink.pages, 0,
1225                                create->u.symlink.len);
1226                xdr->buf->flags |= XDRBUF_WRITE;
1227                break;
1228
1229        case NF4BLK: case NF4CHR:
1230                p = reserve_space(xdr, 8);
1231                *p++ = cpu_to_be32(create->u.device.specdata1);
1232                *p = cpu_to_be32(create->u.device.specdata2);
1233                break;
1234
1235        default:
1236                break;
1237        }
1238
1239        encode_string(xdr, create->name->len, create->name->name);
1240        encode_attrs(xdr, create->attrs, create->label, &create->umask,
1241                        create->server, create->server->attr_bitmask);
1242}
1243
1244static void encode_getattr(struct xdr_stream *xdr,
1245                const __u32 *bitmap, const __u32 *mask, size_t len,
1246                struct compound_hdr *hdr)
1247{
1248        __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1249
1250        encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1251        if (mask) {
1252                if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1253                        len = ARRAY_SIZE(masked_bitmap);
1254                len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1255                bitmap = masked_bitmap;
1256        }
1257        xdr_encode_bitmap4(xdr, bitmap, len);
1258}
1259
1260static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1261{
1262        encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1263                        ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1264}
1265
1266static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1267                                 const u32 *open_bitmap,
1268                                 struct compound_hdr *hdr)
1269{
1270        encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1271}
1272
1273static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1274{
1275        encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1276                        ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1277}
1278
1279static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1280{
1281        encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1282                        ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1283}
1284
1285static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1286{
1287        encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1288}
1289
1290static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1291{
1292        encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1293        encode_string(xdr, name->len, name->name);
1294}
1295
1296static inline int nfs4_lock_type(struct file_lock *fl, int block)
1297{
1298        if (fl->fl_type == F_RDLCK)
1299                return block ? NFS4_READW_LT : NFS4_READ_LT;
1300        return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1301}
1302
1303static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1304{
1305        if (fl->fl_end == OFFSET_MAX)
1306                return ~(uint64_t)0;
1307        return fl->fl_end - fl->fl_start + 1;
1308}
1309
1310static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1311{
1312        __be32 *p;
1313
1314        p = reserve_space(xdr, 32);
1315        p = xdr_encode_hyper(p, lowner->clientid);
1316        *p++ = cpu_to_be32(20);
1317        p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1318        *p++ = cpu_to_be32(lowner->s_dev);
1319        xdr_encode_hyper(p, lowner->id);
1320}
1321
1322/*
1323 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1324 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1325 */
1326static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1327{
1328        __be32 *p;
1329
1330        encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1331        p = reserve_space(xdr, 28);
1332        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1333        *p++ = cpu_to_be32(args->reclaim);
1334        p = xdr_encode_hyper(p, args->fl->fl_start);
1335        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1336        *p = cpu_to_be32(args->new_lock_owner);
1337        if (args->new_lock_owner){
1338                encode_nfs4_seqid(xdr, args->open_seqid);
1339                encode_nfs4_stateid(xdr, &args->open_stateid);
1340                encode_nfs4_seqid(xdr, args->lock_seqid);
1341                encode_lockowner(xdr, &args->lock_owner);
1342        }
1343        else {
1344                encode_nfs4_stateid(xdr, &args->lock_stateid);
1345                encode_nfs4_seqid(xdr, args->lock_seqid);
1346        }
1347}
1348
1349static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1350{
1351        __be32 *p;
1352
1353        encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1354        p = reserve_space(xdr, 20);
1355        *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1356        p = xdr_encode_hyper(p, args->fl->fl_start);
1357        p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1358        encode_lockowner(xdr, &args->lock_owner);
1359}
1360
1361static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1362{
1363        __be32 *p;
1364
1365        encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1366        encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1367        encode_nfs4_seqid(xdr, args->seqid);
1368        encode_nfs4_stateid(xdr, &args->stateid);
1369        p = reserve_space(xdr, 16);
1370        p = xdr_encode_hyper(p, args->fl->fl_start);
1371        xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1372}
1373
1374static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1375{
1376        encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1377        encode_lockowner(xdr, lowner);
1378}
1379
1380static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1381{
1382        encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1383        encode_string(xdr, name->len, name->name);
1384}
1385
1386static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1387{
1388        encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1389}
1390
1391static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1392{
1393        __be32 *p;
1394
1395        p = reserve_space(xdr, 8);
1396        *p++ = cpu_to_be32(share_access);
1397        *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1398}
1399
1400static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1401{
1402        __be32 *p;
1403 /*
1404 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1405 * owner 4 = 32
1406 */
1407        encode_nfs4_seqid(xdr, arg->seqid);
1408        encode_share_access(xdr, arg->share_access);
1409        p = reserve_space(xdr, 36);
1410        p = xdr_encode_hyper(p, arg->clientid);
1411        *p++ = cpu_to_be32(24);
1412        p = xdr_encode_opaque_fixed(p, "open id:", 8);
1413        *p++ = cpu_to_be32(arg->server->s_dev);
1414        *p++ = cpu_to_be32(arg->id.uniquifier);
1415        xdr_encode_hyper(p, arg->id.create_time);
1416}
1417
1418static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1419{
1420        __be32 *p;
1421
1422        p = reserve_space(xdr, 4);
1423        switch(arg->createmode) {
1424        case NFS4_CREATE_UNCHECKED:
1425                *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1426                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1427                                arg->server, arg->server->attr_bitmask);
1428                break;
1429        case NFS4_CREATE_GUARDED:
1430                *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1431                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1432                                arg->server, arg->server->attr_bitmask);
1433                break;
1434        case NFS4_CREATE_EXCLUSIVE:
1435                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1436                encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                break;
1438        case NFS4_CREATE_EXCLUSIVE4_1:
1439                *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1440                encode_nfs4_verifier(xdr, &arg->u.verifier);
1441                encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1442                                arg->server, arg->server->exclcreat_bitmask);
1443        }
1444}
1445
1446static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1447{
1448        __be32 *p;
1449
1450        p = reserve_space(xdr, 4);
1451        switch (arg->open_flags & O_CREAT) {
1452        case 0:
1453                *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1454                break;
1455        default:
1456                *p = cpu_to_be32(NFS4_OPEN_CREATE);
1457                encode_createmode(xdr, arg);
1458        }
1459}
1460
1461static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1462{
1463        __be32 *p;
1464
1465        p = reserve_space(xdr, 4);
1466        switch (delegation_type) {
1467        case 0:
1468                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1469                break;
1470        case FMODE_READ:
1471                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1472                break;
1473        case FMODE_WRITE|FMODE_READ:
1474                *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1475                break;
1476        default:
1477                BUG();
1478        }
1479}
1480
1481static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1482{
1483        __be32 *p;
1484
1485        p = reserve_space(xdr, 4);
1486        *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1487        encode_string(xdr, name->len, name->name);
1488}
1489
1490static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1491{
1492        __be32 *p;
1493
1494        p = reserve_space(xdr, 4);
1495        *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1496        encode_delegation_type(xdr, type);
1497}
1498
1499static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1500{
1501        __be32 *p;
1502
1503        p = reserve_space(xdr, 4);
1504        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1505        encode_nfs4_stateid(xdr, stateid);
1506        encode_string(xdr, name->len, name->name);
1507}
1508
1509static inline void encode_claim_fh(struct xdr_stream *xdr)
1510{
1511        __be32 *p;
1512
1513        p = reserve_space(xdr, 4);
1514        *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1515}
1516
1517static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1518{
1519        __be32 *p;
1520
1521        p = reserve_space(xdr, 4);
1522        *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1523        encode_nfs4_stateid(xdr, stateid);
1524}
1525
1526static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1527{
1528        encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1529        encode_openhdr(xdr, arg);
1530        encode_opentype(xdr, arg);
1531        switch (arg->claim) {
1532        case NFS4_OPEN_CLAIM_NULL:
1533                encode_claim_null(xdr, arg->name);
1534                break;
1535        case NFS4_OPEN_CLAIM_PREVIOUS:
1536                encode_claim_previous(xdr, arg->u.delegation_type);
1537                break;
1538        case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1539                encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1540                break;
1541        case NFS4_OPEN_CLAIM_FH:
1542                encode_claim_fh(xdr);
1543                break;
1544        case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1545                encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1546                break;
1547        default:
1548                BUG();
1549        }
1550}
1551
1552static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1553{
1554        encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1555        encode_nfs4_stateid(xdr, arg->stateid);
1556        encode_nfs4_seqid(xdr, arg->seqid);
1557}
1558
1559static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1560{
1561        encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1562        encode_nfs4_stateid(xdr, &arg->stateid);
1563        encode_nfs4_seqid(xdr, arg->seqid);
1564        encode_share_access(xdr, arg->share_access);
1565}
1566
1567static void
1568encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1569{
1570        encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1571        encode_string(xdr, fh->size, fh->data);
1572}
1573
1574static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1575{
1576        encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1577}
1578
1579static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1580                        struct compound_hdr *hdr)
1581{
1582        __be32 *p;
1583
1584        encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1585        encode_nfs4_stateid(xdr, &args->stateid);
1586
1587        p = reserve_space(xdr, 12);
1588        p = xdr_encode_hyper(p, args->offset);
1589        *p = cpu_to_be32(args->count);
1590}
1591
1592static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1593{
1594        uint32_t attrs[3] = {
1595                FATTR4_WORD0_RDATTR_ERROR,
1596                FATTR4_WORD1_MOUNTED_ON_FILEID,
1597        };
1598        uint32_t dircount = readdir->count >> 1;
1599        __be32 *p, verf[2];
1600        uint32_t attrlen = 0;
1601        unsigned int i;
1602
1603        if (readdir->plus) {
1604                attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1605                        FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1606                attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1607                        FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1608                        FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1609                        FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1610                attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1611                dircount >>= 1;
1612        }
1613        /* Use mounted_on_fileid only if the server supports it */
1614        if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1615                attrs[0] |= FATTR4_WORD0_FILEID;
1616        for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1617                attrs[i] &= readdir->bitmask[i];
1618                if (attrs[i] != 0)
1619                        attrlen = i+1;
1620        }
1621
1622        encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1623        encode_uint64(xdr, readdir->cookie);
1624        encode_nfs4_verifier(xdr, &readdir->verifier);
1625        p = reserve_space(xdr, 12 + (attrlen << 2));
1626        *p++ = cpu_to_be32(dircount);
1627        *p++ = cpu_to_be32(readdir->count);
1628        *p++ = cpu_to_be32(attrlen);
1629        for (i = 0; i < attrlen; i++)
1630                *p++ = cpu_to_be32(attrs[i]);
1631        memcpy(verf, readdir->verifier.data, sizeof(verf));
1632
1633        dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1634                        __func__,
1635                        (unsigned long long)readdir->cookie,
1636                        verf[0], verf[1],
1637                        attrs[0] & readdir->bitmask[0],
1638                        attrs[1] & readdir->bitmask[1],
1639                        attrs[2] & readdir->bitmask[2]);
1640}
1641
1642static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1643{
1644        encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1645}
1646
1647static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1648{
1649        encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1650        encode_string(xdr, name->len, name->name);
1651}
1652
1653static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1654{
1655        encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1656        encode_string(xdr, oldname->len, oldname->name);
1657        encode_string(xdr, newname->len, newname->name);
1658}
1659
1660static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1661                         struct compound_hdr *hdr)
1662{
1663        encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1664        encode_uint64(xdr, clid);
1665}
1666
1667static void
1668encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1669{
1670        encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1671}
1672
1673static void
1674encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1675                struct compound_hdr *hdr)
1676{
1677        __be32 *p;
1678
1679        encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1680        encode_nfs4_stateid(xdr, &zero_stateid);
1681        p = reserve_space(xdr, 2*4);
1682        *p++ = cpu_to_be32(1);
1683        *p = cpu_to_be32(FATTR4_WORD0_ACL);
1684        p = reserve_space(xdr, 4);
1685        *p = cpu_to_be32(arg->acl_len);
1686        xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1687}
1688
1689static void
1690encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1691{
1692        encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1693}
1694
1695static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1696{
1697        encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1698        encode_nfs4_stateid(xdr, &arg->stateid);
1699        encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1700                        server->attr_bitmask);
1701}
1702
1703static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1704{
1705        __be32 *p;
1706
1707        encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1708        encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1709
1710        encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1711                        setclientid->sc_clnt->cl_owner_id);
1712        p = reserve_space(xdr, 4);
1713        *p = cpu_to_be32(setclientid->sc_prog);
1714        encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1715        encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1716        p = reserve_space(xdr, 4);
1717        *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1718}
1719
1720static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1721{
1722        encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1723                        decode_setclientid_confirm_maxsz, hdr);
1724        encode_uint64(xdr, arg->clientid);
1725        encode_nfs4_verifier(xdr, &arg->confirm);
1726}
1727
1728static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1729                         struct compound_hdr *hdr)
1730{
1731        __be32 *p;
1732
1733        encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1734        encode_nfs4_stateid(xdr, &args->stateid);
1735
1736        p = reserve_space(xdr, 16);
1737        p = xdr_encode_hyper(p, args->offset);
1738        *p++ = cpu_to_be32(args->stable);
1739        *p = cpu_to_be32(args->count);
1740
1741        xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1742}
1743
1744static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1745{
1746        encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1747        encode_nfs4_stateid(xdr, stateid);
1748}
1749
1750static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751{
1752        encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1753        encode_string(xdr, name->len, name->name);
1754}
1755
1756#if defined(CONFIG_NFS_V4_1)
1757/* NFSv4.1 operations */
1758static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1759                                   const struct nfs41_bind_conn_to_session_args *args,
1760                                   struct compound_hdr *hdr)
1761{
1762        __be32 *p;
1763
1764        encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1765                decode_bind_conn_to_session_maxsz, hdr);
1766        encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1767        p = xdr_reserve_space(xdr, 8);
1768        *p++ = cpu_to_be32(args->dir);
1769        *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1770}
1771
1772static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1773{
1774        unsigned int i;
1775        encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1776        for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1777                encode_uint32(xdr, op_map->u.words[i]);
1778}
1779
1780static void encode_exchange_id(struct xdr_stream *xdr,
1781                               const struct nfs41_exchange_id_args *args,
1782                               struct compound_hdr *hdr)
1783{
1784        __be32 *p;
1785        char impl_name[IMPL_NAME_LIMIT];
1786        int len = 0;
1787
1788        encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1789        encode_nfs4_verifier(xdr, &args->verifier);
1790
1791        encode_string(xdr, strlen(args->client->cl_owner_id),
1792                        args->client->cl_owner_id);
1793
1794        encode_uint32(xdr, args->flags);
1795        encode_uint32(xdr, args->state_protect.how);
1796
1797        switch (args->state_protect.how) {
1798        case SP4_NONE:
1799                break;
1800        case SP4_MACH_CRED:
1801                encode_op_map(xdr, &args->state_protect.enforce);
1802                encode_op_map(xdr, &args->state_protect.allow);
1803                break;
1804        default:
1805                WARN_ON_ONCE(1);
1806                break;
1807        }
1808
1809        if (send_implementation_id &&
1810            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1811            sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1812                <= sizeof(impl_name) + 1)
1813                len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1814                               utsname()->sysname, utsname()->release,
1815                               utsname()->version, utsname()->machine);
1816
1817        if (len > 0) {
1818                encode_uint32(xdr, 1);  /* implementation id array length=1 */
1819
1820                encode_string(xdr,
1821                        sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1822                        CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1823                encode_string(xdr, len, impl_name);
1824                /* just send zeros for nii_date - the date is in nii_name */
1825                p = reserve_space(xdr, 12);
1826                p = xdr_encode_hyper(p, 0);
1827                *p = cpu_to_be32(0);
1828        } else
1829                encode_uint32(xdr, 0);  /* implementation id array length=0 */
1830}
1831
1832static void encode_create_session(struct xdr_stream *xdr,
1833                                  const struct nfs41_create_session_args *args,
1834                                  struct compound_hdr *hdr)
1835{
1836        __be32 *p;
1837        struct nfs_client *clp = args->client;
1838        struct rpc_clnt *clnt = clp->cl_rpcclient;
1839        struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1840        u32 max_resp_sz_cached;
1841
1842        /*
1843         * Assumes OPEN is the biggest non-idempotent compound.
1844         * 2 is the verifier.
1845         */
1846        max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1847                                * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1848
1849        encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1850        p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1851        p = xdr_encode_hyper(p, args->clientid);
1852        *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1853        *p++ = cpu_to_be32(args->flags);                        /*flags */
1854
1855        /* Fore Channel */
1856        *p++ = cpu_to_be32(0);                          /* header padding size */
1857        *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1858        *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1859        *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1860        *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1861        *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1862        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1863
1864        /* Back Channel */
1865        *p++ = cpu_to_be32(0);                          /* header padding size */
1866        *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1867        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1868        *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1869        *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1870        *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1871        *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1872
1873        *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1874        *p++ = cpu_to_be32(1);
1875        *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1876
1877        /* authsys_parms rfc1831 */
1878        *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1879        p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1880        *p++ = cpu_to_be32(0);                          /* UID */
1881        *p++ = cpu_to_be32(0);                          /* GID */
1882        *p = cpu_to_be32(0);                            /* No more gids */
1883}
1884
1885static void encode_destroy_session(struct xdr_stream *xdr,
1886                                   const struct nfs4_session *session,
1887                                   struct compound_hdr *hdr)
1888{
1889        encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1890        encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1891}
1892
1893static void encode_destroy_clientid(struct xdr_stream *xdr,
1894                                   uint64_t clientid,
1895                                   struct compound_hdr *hdr)
1896{
1897        encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1898        encode_uint64(xdr, clientid);
1899}
1900
1901static void encode_reclaim_complete(struct xdr_stream *xdr,
1902                                    const struct nfs41_reclaim_complete_args *args,
1903                                    struct compound_hdr *hdr)
1904{
1905        encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1906        encode_uint32(xdr, args->one_fs);
1907}
1908#endif /* CONFIG_NFS_V4_1 */
1909
1910static void encode_sequence(struct xdr_stream *xdr,
1911                            const struct nfs4_sequence_args *args,
1912                            struct compound_hdr *hdr)
1913{
1914#if defined(CONFIG_NFS_V4_1)
1915        struct nfs4_session *session;
1916        struct nfs4_slot_table *tp;
1917        struct nfs4_slot *slot = args->sa_slot;
1918        __be32 *p;
1919
1920        tp = slot->table;
1921        session = tp->session;
1922        if (!session)
1923                return;
1924
1925        encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1926
1927        /*
1928         * Sessionid + seqid + slotid + max slotid + cache_this
1929         */
1930        dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1931                "max_slotid=%d cache_this=%d\n",
1932                __func__,
1933                ((u32 *)session->sess_id.data)[0],
1934                ((u32 *)session->sess_id.data)[1],
1935                ((u32 *)session->sess_id.data)[2],
1936                ((u32 *)session->sess_id.data)[3],
1937                slot->seq_nr, slot->slot_nr,
1938                tp->highest_used_slotid, args->sa_cache_this);
1939        p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1940        p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1941        *p++ = cpu_to_be32(slot->seq_nr);
1942        *p++ = cpu_to_be32(slot->slot_nr);
1943        *p++ = cpu_to_be32(tp->highest_used_slotid);
1944        *p = cpu_to_be32(args->sa_cache_this);
1945#endif /* CONFIG_NFS_V4_1 */
1946}
1947
1948#ifdef CONFIG_NFS_V4_1
1949static void
1950encode_getdeviceinfo(struct xdr_stream *xdr,
1951                     const struct nfs4_getdeviceinfo_args *args,
1952                     struct compound_hdr *hdr)
1953{
1954        __be32 *p;
1955
1956        encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1957        p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1958        p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1959                                    NFS4_DEVICEID4_SIZE);
1960        *p++ = cpu_to_be32(args->pdev->layout_type);
1961        *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1962
1963        p = reserve_space(xdr, 4 + 4);
1964        *p++ = cpu_to_be32(1);                  /* bitmap length */
1965        *p++ = cpu_to_be32(args->notify_types);
1966}
1967
1968static void
1969encode_layoutget(struct xdr_stream *xdr,
1970                      const struct nfs4_layoutget_args *args,
1971                      struct compound_hdr *hdr)
1972{
1973        __be32 *p;
1974
1975        encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1976        p = reserve_space(xdr, 36);
1977        *p++ = cpu_to_be32(0);     /* Signal layout available */
1978        *p++ = cpu_to_be32(args->type);
1979        *p++ = cpu_to_be32(args->range.iomode);
1980        p = xdr_encode_hyper(p, args->range.offset);
1981        p = xdr_encode_hyper(p, args->range.length);
1982        p = xdr_encode_hyper(p, args->minlength);
1983        encode_nfs4_stateid(xdr, &args->stateid);
1984        encode_uint32(xdr, args->maxcount);
1985
1986        dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1987                __func__,
1988                args->type,
1989                args->range.iomode,
1990                (unsigned long)args->range.offset,
1991                (unsigned long)args->range.length,
1992                args->maxcount);
1993}
1994
1995static int
1996encode_layoutcommit(struct xdr_stream *xdr,
1997                    struct inode *inode,
1998                    const struct nfs4_layoutcommit_args *args,
1999                    struct compound_hdr *hdr)
2000{

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

3001}
3002
3003/*
3004 * Encode GETDEVICEINFO request
3005 */
3006static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3007                                       struct xdr_stream *xdr,
3008                                       const void *data)
3009{
3010        const struct nfs4_getdeviceinfo_args *args = data;
3011        struct compound_hdr hdr = {
3012                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3013        };
3014        uint32_t replen;
3015
3016        encode_compound_hdr(xdr, req, &hdr);
3017        encode_sequence(xdr, &args->seq_args, &hdr);
3018
3019        replen = hdr.replen + op_decode_hdr_maxsz + 2;
3020
3021        encode_getdeviceinfo(xdr, args, &hdr);
3022
3023        /* set up reply kvec. device_addr4 opaque data is read into the
3024         * pages */
3025        rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3026                                args->pdev->pglen, replen);
3027        encode_nops(&hdr);
3028}
3029
3030/*
3031 *  Encode LAYOUTGET request
3032 */
3033static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3034                                   struct xdr_stream *xdr,
3035                                   const void *data)
3036{
3037        const struct nfs4_layoutget_args *args = data;
3038        struct compound_hdr hdr = {
3039                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3040        };
3041
3042        encode_compound_hdr(xdr, req, &hdr);
3043        encode_sequence(xdr, &args->seq_args, &hdr);
3044        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3045        encode_layoutget(xdr, args, &hdr);
3046
3047        rpc_prepare_reply_pages(req, args->layout.pages, 0,
3048                                args->layout.pglen, hdr.replen - pagepad_maxsz);
3049        encode_nops(&hdr);
3050}
3051
3052/*
3053 *  Encode LAYOUTCOMMIT request
3054 */
3055static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3056                                      struct xdr_stream *xdr,
3057                                      const void *priv)
3058{
3059        const struct nfs4_layoutcommit_args *args = priv;
3060        struct nfs4_layoutcommit_data *data =
3061                container_of(args, struct nfs4_layoutcommit_data, args);
3062        struct compound_hdr hdr = {
3063                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3064        };
3065
3066        encode_compound_hdr(xdr, req, &hdr);
3067        encode_sequence(xdr, &args->seq_args, &hdr);
3068        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3069        encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3070        encode_getfattr(xdr, args->bitmask, &hdr);
3071        encode_nops(&hdr);
3072}
3073
3074/*
3075 * Encode LAYOUTRETURN request
3076 */
3077static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3078                                      struct xdr_stream *xdr,
3079                                      const void *data)
3080{
3081        const struct nfs4_layoutreturn_args *args = data;
3082        struct compound_hdr hdr = {
3083                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3084        };
3085
3086        encode_compound_hdr(xdr, req, &hdr);
3087        encode_sequence(xdr, &args->seq_args, &hdr);
3088        encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3089        encode_layoutreturn(xdr, args, &hdr);
3090        encode_nops(&hdr);
3091}
3092
3093/*
3094 * Encode SECINFO_NO_NAME request
3095 */
3096static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3097                                        struct xdr_stream *xdr,
3098                                        const void *data)
3099{
3100        const struct nfs41_secinfo_no_name_args *args = data;
3101        struct compound_hdr hdr = {
3102                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3103        };
3104
3105        encode_compound_hdr(xdr, req, &hdr);
3106        encode_sequence(xdr, &args->seq_args, &hdr);
3107        encode_putrootfh(xdr, &hdr);
3108        encode_secinfo_no_name(xdr, args, &hdr);
3109        encode_nops(&hdr);
3110}
3111
3112/*
3113 *  Encode TEST_STATEID request
3114 */
3115static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3116                                      struct xdr_stream *xdr,
3117                                      const void *data)
3118{
3119        const struct nfs41_test_stateid_args *args = data;
3120        struct compound_hdr hdr = {
3121                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3122        };
3123
3124        encode_compound_hdr(xdr, req, &hdr);
3125        encode_sequence(xdr, &args->seq_args, &hdr);
3126        encode_test_stateid(xdr, args, &hdr);
3127        encode_nops(&hdr);
3128}
3129
3130/*
3131 *  Encode FREE_STATEID request
3132 */
3133static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3134                                     struct xdr_stream *xdr,
3135                                     const void *data)
3136{
3137        const struct nfs41_free_stateid_args *args = data;
3138        struct compound_hdr hdr = {
3139                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3140        };
3141
3142        encode_compound_hdr(xdr, req, &hdr);
3143        encode_sequence(xdr, &args->seq_args, &hdr);
3144        encode_free_stateid(xdr, args, &hdr);
3145        encode_nops(&hdr);
3146}
3147#endif /* CONFIG_NFS_V4_1 */
3148
3149static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3150{
3151        ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3152                        NFS4_OPAQUE_LIMIT);
3153        if (unlikely(ret < 0))
3154                return -EIO;
3155        *len = ret;
3156        return 0;
3157}
3158
3159static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3160{
3161        __be32 *p;
3162
3163        p = xdr_inline_decode(xdr, 8);
3164        if (unlikely(!p))
3165                return -EIO;
3166        hdr->status = be32_to_cpup(p++);
3167        hdr->taglen = be32_to_cpup(p);
3168
3169        p = xdr_inline_decode(xdr, hdr->taglen + 4);
3170        if (unlikely(!p))
3171                return -EIO;
3172        hdr->tag = (char *)p;
3173        p += XDR_QUADLEN(hdr->taglen);
3174        hdr->nops = be32_to_cpup(p);
3175        if (unlikely(hdr->nops < 1))
3176                return nfs4_stat_to_errno(hdr->status);
3177        return 0;
3178}
3179
3180static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3181                int *nfs_retval)
3182{
3183        __be32 *p;
3184        uint32_t opnum;
3185        int32_t nfserr;
3186
3187        p = xdr_inline_decode(xdr, 8);
3188        if (unlikely(!p))
3189                goto out_overflow;
3190        opnum = be32_to_cpup(p++);
3191        if (unlikely(opnum != expected))
3192                goto out_bad_operation;
3193        if (unlikely(*p != cpu_to_be32(NFS_OK)))
3194                goto out_status;
3195        *nfs_retval = 0;
3196        return true;
3197out_status:
3198        nfserr = be32_to_cpup(p);
3199        trace_nfs4_xdr_status(xdr, opnum, nfserr);
3200        *nfs_retval = nfs4_stat_to_errno(nfserr);
3201        return true;
3202out_bad_operation:
3203        dprintk("nfs: Server returned operation"
3204                " %d but we issued a request for %d\n",
3205                        opnum, expected);
3206        *nfs_retval = -EREMOTEIO;
3207        return false;
3208out_overflow:
3209        *nfs_retval = -EIO;
3210        return false;
3211}
3212
3213static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3214{
3215        int retval;
3216
3217        __decode_op_hdr(xdr, expected, &retval);
3218        return retval;
3219}
3220
3221/* Dummy routine */
3222static int decode_ace(struct xdr_stream *xdr, void *ace)
3223{
3224        __be32 *p;
3225        unsigned int strlen;
3226        char *str;
3227
3228        p = xdr_inline_decode(xdr, 12);
3229        if (unlikely(!p))
3230                return -EIO;
3231        return decode_opaque_inline(xdr, &strlen, &str);
3232}
3233
3234static ssize_t
3235decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3236{
3237        ssize_t ret;
3238
3239        ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3240        if (likely(ret >= 0))
3241                return ret;
3242        if (ret != -EMSGSIZE)
3243                return -EIO;
3244        return sz;
3245}
3246
3247static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3248{
3249        ssize_t ret;
3250        ret = decode_bitmap4(xdr, bitmap, 3);
3251        return ret < 0 ? ret : 0;
3252}
3253
3254static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3255{
3256        __be32 *p;
3257
3258        p = xdr_inline_decode(xdr, 4);
3259        if (unlikely(!p))
3260                return -EIO;
3261        *attrlen = be32_to_cpup(p);
3262        *savep = xdr_stream_pos(xdr);
3263        return 0;
3264}
3265
3266static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3267{
3268        if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3269                int ret;
3270                ret = decode_attr_bitmap(xdr, bitmask);
3271                if (unlikely(ret < 0))
3272                        return ret;
3273                bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3274        } else
3275                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3276        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3277                bitmask[0], bitmask[1], bitmask[2]);
3278        return 0;
3279}
3280
3281static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3282{
3283        __be32 *p;
3284        int ret = 0;
3285
3286        *type = 0;
3287        if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3288                return -EIO;
3289        if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3290                p = xdr_inline_decode(xdr, 4);
3291                if (unlikely(!p))
3292                        return -EIO;
3293                *type = be32_to_cpup(p);
3294                if (*type < NF4REG || *type > NF4NAMEDATTR) {
3295                        dprintk("%s: bad type %d\n", __func__, *type);
3296                        return -EIO;
3297                }
3298                bitmap[0] &= ~FATTR4_WORD0_TYPE;
3299                ret = NFS_ATTR_FATTR_TYPE;
3300        }
3301        dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3302        return ret;
3303}
3304
3305static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3306                                      uint32_t *bitmap, uint32_t *type)
3307{
3308        __be32 *p;
3309
3310        *type = 0;
3311        if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3312                return -EIO;
3313        if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3314                p = xdr_inline_decode(xdr, 4);
3315                if (unlikely(!p))
3316                        return -EIO;
3317                *type = be32_to_cpup(p);
3318                bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3319        }
3320        dprintk("%s: expire type=0x%x\n", __func__, *type);
3321        return 0;
3322}
3323
3324static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3325{
3326        __be32 *p;
3327        int ret = 0;
3328
3329        *change = 0;
3330        if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3331                return -EIO;
3332        if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3333                p = xdr_inline_decode(xdr, 8);
3334                if (unlikely(!p))
3335                        return -EIO;
3336                xdr_decode_hyper(p, change);
3337                bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3338                ret = NFS_ATTR_FATTR_CHANGE;
3339        }
3340        dprintk("%s: change attribute=%Lu\n", __func__,
3341                        (unsigned long long)*change);
3342        return ret;
3343}
3344
3345static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3346{
3347        __be32 *p;
3348        int ret = 0;
3349
3350        *size = 0;
3351        if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3352                return -EIO;
3353        if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3354                p = xdr_inline_decode(xdr, 8);
3355                if (unlikely(!p))
3356                        return -EIO;
3357                xdr_decode_hyper(p, size);
3358                bitmap[0] &= ~FATTR4_WORD0_SIZE;
3359                ret = NFS_ATTR_FATTR_SIZE;
3360        }
3361        dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3362        return ret;
3363}
3364
3365static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3366{
3367        __be32 *p;
3368
3369        *res = 0;
3370        if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3371                return -EIO;
3372        if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3373                p = xdr_inline_decode(xdr, 4);
3374                if (unlikely(!p))
3375                        return -EIO;
3376                *res = be32_to_cpup(p);
3377                bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3378        }
3379        dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3380        return 0;
3381}
3382
3383static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3384{
3385        __be32 *p;
3386
3387        *res = 0;
3388        if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3389                return -EIO;
3390        if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3391                p = xdr_inline_decode(xdr, 4);
3392                if (unlikely(!p))
3393                        return -EIO;
3394                *res = be32_to_cpup(p);
3395                bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3396        }
3397        dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3398        return 0;
3399}
3400
3401static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3402{
3403        __be32 *p;
3404        int ret = 0;
3405
3406        fsid->major = 0;
3407        fsid->minor = 0;
3408        if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3409                return -EIO;
3410        if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3411                p = xdr_inline_decode(xdr, 16);
3412                if (unlikely(!p))
3413                        return -EIO;
3414                p = xdr_decode_hyper(p, &fsid->major);
3415                xdr_decode_hyper(p, &fsid->minor);
3416                bitmap[0] &= ~FATTR4_WORD0_FSID;
3417                ret = NFS_ATTR_FATTR_FSID;
3418        }
3419        dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3420                        (unsigned long long)fsid->major,
3421                        (unsigned long long)fsid->minor);
3422        return ret;
3423}
3424
3425static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3426{
3427        __be32 *p;
3428
3429        *res = 60;
3430        if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3431                return -EIO;
3432        if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3433                p = xdr_inline_decode(xdr, 4);
3434                if (unlikely(!p))
3435                        return -EIO;
3436                *res = be32_to_cpup(p);
3437                bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3438        }
3439        dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3440        return 0;
3441}
3442
3443static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3444{
3445        __be32 *p;
3446
3447        if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3448                return -EIO;
3449        if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3450                p = xdr_inline_decode(xdr, 4);
3451                if (unlikely(!p))
3452                        return -EIO;
3453                bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3454                *res = -be32_to_cpup(p);
3455        }
3456        return 0;
3457}
3458
3459static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3460                                 uint32_t *bitmap, uint32_t *bitmask)
3461{
3462        if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3463                int ret;
3464                ret = decode_attr_bitmap(xdr, bitmask);
3465                if (unlikely(ret < 0))
3466                        return ret;
3467                bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3468        } else
3469                bitmask[0] = bitmask[1] = bitmask[2] = 0;
3470        dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3471                bitmask[0], bitmask[1], bitmask[2]);
3472        return 0;
3473}
3474
3475static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3476{
3477        __be32 *p;
3478        u32 len;
3479
3480        if (fh != NULL)
3481                memset(fh, 0, sizeof(*fh));
3482
3483        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3484                return -EIO;
3485        if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3486                p = xdr_inline_decode(xdr, 4);
3487                if (unlikely(!p))
3488                        return -EIO;
3489                len = be32_to_cpup(p);
3490                if (len > NFS4_FHSIZE)
3491                        return -EIO;
3492                p = xdr_inline_decode(xdr, len);
3493                if (unlikely(!p))
3494                        return -EIO;
3495                if (fh != NULL) {
3496                        memcpy(fh->data, p, len);
3497                        fh->size = len;
3498                }
3499                bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3500        }
3501        return 0;
3502}
3503
3504static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3505{
3506        __be32 *p;
3507
3508        *res = 0;
3509        if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3510                return -EIO;
3511        if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3512                p = xdr_inline_decode(xdr, 4);
3513                if (unlikely(!p))
3514                        return -EIO;
3515                *res = be32_to_cpup(p);
3516                bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3517        }
3518        dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3519        return 0;
3520}
3521
3522static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3523{
3524        __be32 *p;
3525        int ret = 0;
3526
3527        *fileid = 0;
3528        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3529                return -EIO;
3530        if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3531                p = xdr_inline_decode(xdr, 8);
3532                if (unlikely(!p))
3533                        return -EIO;
3534                xdr_decode_hyper(p, fileid);
3535                bitmap[0] &= ~FATTR4_WORD0_FILEID;
3536                ret = NFS_ATTR_FATTR_FILEID;
3537        }
3538        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3539        return ret;
3540}
3541
3542static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3543{
3544        __be32 *p;
3545        int ret = 0;
3546
3547        *fileid = 0;
3548        if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3549                return -EIO;
3550        if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3551                p = xdr_inline_decode(xdr, 8);
3552                if (unlikely(!p))
3553                        return -EIO;
3554                xdr_decode_hyper(p, fileid);
3555                bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3556                ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3557        }
3558        dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3559        return ret;
3560}
3561
3562static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3563{
3564        __be32 *p;
3565        int status = 0;
3566
3567        *res = 0;
3568        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3569                return -EIO;
3570        if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3571                p = xdr_inline_decode(xdr, 8);
3572                if (unlikely(!p))
3573                        return -EIO;
3574                xdr_decode_hyper(p, res);
3575                bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3576        }
3577        dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3578        return status;
3579}
3580
3581static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3582{
3583        __be32 *p;
3584        int status = 0;
3585
3586        *res = 0;
3587        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3588                return -EIO;
3589        if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3590                p = xdr_inline_decode(xdr, 8);
3591                if (unlikely(!p))
3592                        return -EIO;
3593                xdr_decode_hyper(p, res);
3594                bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3595        }
3596        dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3597        return status;
3598}
3599
3600static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3601{
3602        __be32 *p;
3603        int status = 0;
3604
3605        *res = 0;
3606        if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3607                return -EIO;
3608        if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3609                p = xdr_inline_decode(xdr, 8);
3610                if (unlikely(!p))
3611                        return -EIO;
3612                xdr_decode_hyper(p, res);
3613                bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3614        }
3615        dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3616        return status;
3617}
3618
3619static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3620{
3621        u32 n;
3622        __be32 *p;
3623        int status = 0;
3624
3625        p = xdr_inline_decode(xdr, 4);
3626        if (unlikely(!p))
3627                return -EIO;
3628        n = be32_to_cpup(p);
3629        if (n == 0)
3630                goto root_path;
3631        dprintk("pathname4: ");
3632        if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3633                dprintk("cannot parse %d components in path\n", n);
3634                goto out_eio;
3635        }
3636        for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3637                struct nfs4_string *component = &path->components[path->ncomponents];
3638                status = decode_opaque_inline(xdr, &component->len, &component->data);
3639                if (unlikely(status != 0))
3640                        goto out_eio;
3641                ifdebug (XDR)
3642                        pr_cont("%s%.*s ",
3643                                (path->ncomponents != n ? "/ " : ""),
3644                                component->len, component->data);
3645        }
3646out:
3647        return status;
3648root_path:
3649/* a root pathname is sent as a zero component4 */
3650        path->ncomponents = 1;
3651        path->components[0].len=0;
3652        path->components[0].data=NULL;
3653        dprintk("pathname4: /\n");
3654        goto out;
3655out_eio:
3656        dprintk(" status %d", status);
3657        status = -EIO;
3658        goto out;
3659}
3660
3661static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3662{
3663        int n;
3664        __be32 *p;
3665        int status = -EIO;
3666
3667        if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3668                goto out;
3669        status = 0;
3670        if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3671                goto out;
3672        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3673        status = -EIO;
3674        /* Ignore borken servers that return unrequested attrs */
3675        if (unlikely(res == NULL))
3676                goto out;
3677        dprintk("%s: fsroot:\n", __func__);
3678        status = decode_pathname(xdr, &res->fs_path);
3679        if (unlikely(status != 0))
3680                goto out;
3681        p = xdr_inline_decode(xdr, 4);
3682        if (unlikely(!p))
3683                goto out_eio;
3684        n = be32_to_cpup(p);
3685        if (n <= 0)
3686                goto out_eio;
3687        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3688                u32 m;
3689                struct nfs4_fs_location *loc;
3690
3691                if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3692                        break;
3693                loc = &res->locations[res->nlocations];
3694                p = xdr_inline_decode(xdr, 4);
3695                if (unlikely(!p))
3696                        goto out_eio;
3697                m = be32_to_cpup(p);
3698
3699                dprintk("%s: servers:\n", __func__);
3700                for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3701                        struct nfs4_string *server;
3702
3703                        if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3704                                unsigned int i;
3705                                dprintk("%s: using first %u of %u servers "
3706                                        "returned for location %u\n",
3707                                                __func__,
3708                                                NFS4_FS_LOCATION_MAXSERVERS,
3709                                                m, res->nlocations);
3710                                for (i = loc->nservers; i < m; i++) {
3711                                        unsigned int len;
3712                                        char *data;
3713                                        status = decode_opaque_inline(xdr, &len, &data);
3714                                        if (unlikely(status != 0))
3715                                                goto out_eio;
3716                                }
3717                                break;
3718                        }
3719                        server = &loc->servers[loc->nservers];
3720                        status = decode_opaque_inline(xdr, &server->len, &server->data);
3721                        if (unlikely(status != 0))
3722                                goto out_eio;
3723                        dprintk("%s ", server->data);
3724                }
3725                status = decode_pathname(xdr, &loc->rootpath);
3726                if (unlikely(status != 0))
3727                        goto out_eio;
3728        }
3729        if (res->nlocations != 0)
3730                status = NFS_ATTR_FATTR_V4_LOCATIONS;
3731out:
3732        dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3733        return status;
3734out_eio:
3735        status = -EIO;
3736        goto out;
3737}
3738
3739static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3740{
3741        __be32 *p;
3742        int status = 0;
3743
3744        *res = 0;
3745        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3746                return -EIO;
3747        if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3748                p = xdr_inline_decode(xdr, 8);
3749                if (unlikely(!p))
3750                        return -EIO;
3751                xdr_decode_hyper(p, res);
3752                bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3753        }
3754        dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3755        return status;
3756}
3757
3758static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3759{
3760        __be32 *p;
3761        int status = 0;
3762
3763        *maxlink = 1;
3764        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3765                return -EIO;
3766        if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3767                p = xdr_inline_decode(xdr, 4);
3768                if (unlikely(!p))
3769                        return -EIO;
3770                *maxlink = be32_to_cpup(p);
3771                bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3772        }
3773        dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3774        return status;
3775}
3776
3777static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3778{
3779        __be32 *p;
3780        int status = 0;
3781
3782        *maxname = 1024;
3783        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3784                return -EIO;
3785        if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3786                p = xdr_inline_decode(xdr, 4);
3787                if (unlikely(!p))
3788                        return -EIO;
3789                *maxname = be32_to_cpup(p);
3790                bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3791        }
3792        dprintk("%s: maxname=%u\n", __func__, *maxname);
3793        return status;
3794}
3795
3796static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3797{
3798        __be32 *p;
3799        int status = 0;
3800
3801        *res = 1024;
3802        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3803                return -EIO;
3804        if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3805                uint64_t maxread;
3806                p = xdr_inline_decode(xdr, 8);
3807                if (unlikely(!p))
3808                        return -EIO;
3809                xdr_decode_hyper(p, &maxread);
3810                if (maxread > 0x7FFFFFFF)
3811                        maxread = 0x7FFFFFFF;
3812                *res = (uint32_t)maxread;
3813                bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3814        }
3815        dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3816        return status;
3817}
3818
3819static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820{
3821        __be32 *p;
3822        int status = 0;
3823
3824        *res = 1024;
3825        if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826                return -EIO;
3827        if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828                uint64_t maxwrite;
3829                p = xdr_inline_decode(xdr, 8);
3830                if (unlikely(!p))
3831                        return -EIO;
3832                xdr_decode_hyper(p, &maxwrite);
3833                if (maxwrite > 0x7FFFFFFF)
3834                        maxwrite = 0x7FFFFFFF;
3835                *res = (uint32_t)maxwrite;
3836                bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837        }
3838        dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839        return status;
3840}
3841
3842static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3843{
3844        uint32_t tmp;
3845        __be32 *p;
3846        int ret = 0;
3847
3848        *mode = 0;
3849        if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3850                return -EIO;
3851        if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3852                p = xdr_inline_decode(xdr, 4);
3853                if (unlikely(!p))
3854                        return -EIO;
3855                tmp = be32_to_cpup(p);
3856                *mode = tmp & ~S_IFMT;
3857                bitmap[1] &= ~FATTR4_WORD1_MODE;
3858                ret = NFS_ATTR_FATTR_MODE;
3859        }
3860        dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3861        return ret;
3862}
3863
3864static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3865{
3866        __be32 *p;
3867        int ret = 0;
3868
3869        *nlink = 1;
3870        if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3871                return -EIO;
3872        if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3873                p = xdr_inline_decode(xdr, 4);
3874                if (unlikely(!p))
3875                        return -EIO;
3876                *nlink = be32_to_cpup(p);
3877                bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3878                ret = NFS_ATTR_FATTR_NLINK;
3879        }
3880        dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3881        return ret;
3882}
3883
3884static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3885                struct nfs4_string *name, gfp_t gfp_flags)
3886{
3887        ssize_t ret;
3888
3889        ret = xdr_stream_decode_string_dup(xdr, &name->data,
3890                        XDR_MAX_NETOBJ, gfp_flags);
3891        name->len = 0;
3892        if (ret > 0)
3893                name->len = ret;
3894        return ret;
3895}
3896
3897static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3898                const struct nfs_server *server, kuid_t *uid,
3899                struct nfs4_string *owner_name)
3900{
3901        ssize_t len;
3902        char *p;
3903
3904        *uid = make_kuid(&init_user_ns, -2);
3905        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3906                return -EIO;
3907        if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3908                return 0;
3909        bitmap[1] &= ~FATTR4_WORD1_OWNER;
3910
3911        if (owner_name != NULL) {
3912                len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3913                if (len <= 0)
3914                        goto out;
3915                dprintk("%s: name=%s\n", __func__, owner_name->data);
3916                return NFS_ATTR_FATTR_OWNER_NAME;
3917        } else {
3918                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3919                                XDR_MAX_NETOBJ);
3920                if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3921                        goto out;
3922                dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3923                return NFS_ATTR_FATTR_OWNER;
3924        }
3925out:
3926        if (len == -EBADMSG)
3927                return -EIO;
3928        return 0;
3929}
3930
3931static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3932                const struct nfs_server *server, kgid_t *gid,
3933                struct nfs4_string *group_name)
3934{
3935        ssize_t len;
3936        char *p;
3937
3938        *gid = make_kgid(&init_user_ns, -2);
3939        if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3940                return -EIO;
3941        if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3942                return 0;
3943        bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3944
3945        if (group_name != NULL) {
3946                len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3947                if (len <= 0)
3948                        goto out;
3949                dprintk("%s: name=%s\n", __func__, group_name->data);
3950                return NFS_ATTR_FATTR_GROUP_NAME;
3951        } else {
3952                len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3953                                XDR_MAX_NETOBJ);
3954                if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3955                        goto out;
3956                dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3957                return NFS_ATTR_FATTR_GROUP;
3958        }
3959out:
3960        if (len == -EBADMSG)
3961                return -EIO;
3962        return 0;
3963}
3964
3965static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3966{
3967        uint32_t major = 0, minor = 0;
3968        __be32 *p;
3969        int ret = 0;
3970
3971        *rdev = MKDEV(0,0);
3972        if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3973                return -EIO;
3974        if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3975                dev_t tmp;
3976
3977                p = xdr_inline_decode(xdr, 8);
3978                if (unlikely(!p))
3979                        return -EIO;
3980                major = be32_to_cpup(p++);
3981                minor = be32_to_cpup(p);
3982                tmp = MKDEV(major, minor);
3983                if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3984                        *rdev = tmp;
3985                bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3986                ret = NFS_ATTR_FATTR_RDEV;
3987        }
3988        dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3989        return ret;
3990}
3991
3992static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3993{
3994        __be32 *p;
3995        int status = 0;
3996
3997        *res = 0;
3998        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3999                return -EIO;
4000        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {

4001                p = xdr_inline_decode(xdr, 8);
4002                if (unlikely(!p))
4003                        return -EIO;
4004                xdr_decode_hyper(p, res);
4005                bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4006        }
4007        dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4008        return status;
4009}
4010
4011static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4012{
4013        __be32 *p;
4014        int status = 0;
4015
4016        *res = 0;
4017        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4018                return -EIO;
4019        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4020                p = xdr_inline_decode(xdr, 8);
4021                if (unlikely(!p))
4022                        return -EIO;
4023                xdr_decode_hyper(p, res);
4024                bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4025        }
4026        dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4027        return status;
4028}
4029
4030static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031{
4032        __be32 *p;
4033        int status = 0;
4034
4035        *res = 0;
4036        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4037                return -EIO;
4038        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4039                p = xdr_inline_decode(xdr, 8);
4040                if (unlikely(!p))
4041                        return -EIO;
4042                xdr_decode_hyper(p, res);
4043                bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4044        }
4045        dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4046        return status;
4047}
4048
4049static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4050{
4051        __be32 *p;
4052        int ret = 0;
4053
4054        *used = 0;
4055        if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4056                return -EIO;
4057        if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4058                p = xdr_inline_decode(xdr, 8);
4059                if (unlikely(!p))
4060                        return -EIO;
4061                xdr_decode_hyper(p, used);
4062                bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4063                ret = NFS_ATTR_FATTR_SPACE_USED;
4064        }
4065        dprintk("%s: space used=%Lu\n", __func__,
4066                        (unsigned long long)*used);
4067        return ret;
4068}
4069
4070static __be32 *
4071xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4072{
4073        __u64 sec;
4074
4075        p = xdr_decode_hyper(p, &sec);
4076        t-> tv_sec = sec;
4077        t->tv_nsec = be32_to_cpup(p++);
4078        return p;
4079}
4080
4081static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4082{
4083        __be32 *p;
4084
4085        p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4086        if (unlikely(!p))
4087                return -EIO;
4088        xdr_decode_nfstime4(p, time);
4089        return 0;
4090}
4091
4092static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4093{
4094        int status = 0;
4095
4096        time->tv_sec = 0;
4097        time->tv_nsec = 0;
4098        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4099                return -EIO;
4100        if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4101                status = decode_attr_time(xdr, time);
4102                if (status == 0)
4103                        status = NFS_ATTR_FATTR_ATIME;
4104                bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4105        }
4106        dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4107        return status;
4108}
4109
4110static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4111{
4112        int status = 0;
4113
4114        time->tv_sec = 0;
4115        time->tv_nsec = 0;
4116        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4117                return -EIO;
4118        if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4119                status = decode_attr_time(xdr, time);
4120                if (status == 0)
4121                        status = NFS_ATTR_FATTR_CTIME;
4122                bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4123        }
4124        dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4125        return status;
4126}
4127
4128static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4129                                  struct timespec64 *time)
4130{
4131        int status = 0;
4132
4133        time->tv_sec = 0;
4134        time->tv_nsec = 0;
4135        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4136                return -EIO;
4137        if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4138                status = decode_attr_time(xdr, time);
4139                bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4140        }
4141        dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4142                time->tv_nsec);
4143        return status;
4144}
4145
4146static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4147                                        struct nfs4_label *label)
4148{
4149        uint32_t pi = 0;
4150        uint32_t lfs = 0;
4151        __u32 len;
4152        __be32 *p;
4153        int status = 0;
4154
4155        if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4156                return -EIO;
4157        if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4158                p = xdr_inline_decode(xdr, 4);
4159                if (unlikely(!p))
4160                        return -EIO;
4161                lfs = be32_to_cpup(p++);
4162                p = xdr_inline_decode(xdr, 4);
4163                if (unlikely(!p))
4164                        return -EIO;
4165                pi = be32_to_cpup(p++);
4166                p = xdr_inline_decode(xdr, 4);
4167                if (unlikely(!p))
4168                        return -EIO;
4169                len = be32_to_cpup(p++);
4170                p = xdr_inline_decode(xdr, len);
4171                if (unlikely(!p))
4172                        return -EIO;
4173                if (len < NFS4_MAXLABELLEN) {
4174                        if (label) {
4175                                if (label->len) {
4176                                        if (label->len < len)
4177                                                return -ERANGE;
4178                                        memcpy(label->label, p, len);
4179                                }
4180                                label->len = len;
4181                                label->pi = pi;
4182                                label->lfs = lfs;
4183                                status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4184                        }
4185                        bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4186                } else
4187                        printk(KERN_WARNING "%s: label too long (%u)!\n",
4188                                        __func__, len);
4189        }
4190        if (label && label->label)
4191                dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4192                        (char *)label->label, label->len, label->pi, label->lfs);
4193        return status;
4194}
4195
4196static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4197{
4198        int status = 0;
4199
4200        time->tv_sec = 0;
4201        time->tv_nsec = 0;
4202        if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4203                return -EIO;
4204        if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4205                status = decode_attr_time(xdr, time);
4206                if (status == 0)
4207                        status = NFS_ATTR_FATTR_MTIME;
4208                bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4209        }
4210        dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4211        return status;
4212}
4213
4214static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4215                                    uint32_t *res)
4216{
4217        __be32 *p;
4218
4219        *res = 0;
4220        if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4221                return -EIO;
4222        if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4223                p = xdr_inline_decode(xdr, 4);
4224                if (unlikely(!p))
4225                        return -EIO;
4226                *res = be32_to_cpup(p);
4227                bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4228        }
4229        dprintk("%s: XATTR support=%s\n", __func__,
4230                *res == 0 ? "false" : "true");
4231        return 0;
4232}
4233
4234static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4235{
4236        unsigned int attrwords = XDR_QUADLEN(attrlen);
4237        unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4238
4239        if (unlikely(attrwords != nwords)) {
4240                dprintk("%s: server returned incorrect attribute length: "
4241                        "%u %c %u\n",
4242                                __func__,
4243                                attrwords << 2,
4244                                (attrwords < nwords) ? '<' : '>',
4245                                nwords << 2);
4246                return -EIO;
4247        }
4248        return 0;
4249}
4250
4251static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4252{
4253        __be32 *p;
4254
4255        p = xdr_inline_decode(xdr, 20);
4256        if (unlikely(!p))
4257                return -EIO;
4258        cinfo->atomic = be32_to_cpup(p++);
4259        p = xdr_decode_hyper(p, &cinfo->before);
4260        xdr_decode_hyper(p, &cinfo->after);
4261        return 0;
4262}
4263
4264static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4265{
4266        __be32 *p;
4267        uint32_t supp, acc;
4268        int status;
4269
4270        status = decode_op_hdr(xdr, OP_ACCESS);
4271        if (status)
4272                return status;
4273        p = xdr_inline_decode(xdr, 8);
4274        if (unlikely(!p))
4275                return -EIO;
4276        supp = be32_to_cpup(p++);
4277        acc = be32_to_cpup(p);
4278        *supported = supp;
4279        *access = acc;
4280        return 0;
4281}
4282
4283static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4284{
4285        ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4286        if (unlikely(ret < 0))
4287                return -EIO;
4288        return 0;
4289}
4290
4291static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4292{
4293        return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4294}
4295
4296static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4297{
4298        stateid->type = NFS4_OPEN_STATEID_TYPE;
4299        return decode_stateid(xdr, stateid);
4300}
4301
4302static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303{
4304        stateid->type = NFS4_LOCK_STATEID_TYPE;
4305        return decode_stateid(xdr, stateid);
4306}
4307
4308static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309{
4310        stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4311        return decode_stateid(xdr, stateid);
4312}
4313
4314static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4315{
4316        nfs4_stateid dummy;
4317
4318        nfs4_stateid_copy(stateid, &invalid_stateid);
4319        return decode_stateid(xdr, &dummy);
4320}
4321
4322static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4323{
4324        int status;
4325
4326        status = decode_op_hdr(xdr, OP_CLOSE);
4327        if (status != -EIO)
4328                nfs_increment_open_seqid(status, res->seqid);
4329        if (!status)
4330                status = decode_invalid_stateid(xdr, &res->stateid);
4331        return status;
4332}
4333
4334static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4335{
4336        return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4337}
4338
4339static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4340{
4341        return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4342}
4343
4344static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4345{
4346        struct nfs_writeverf *verf = res->verf;
4347        int status;
4348
4349        status = decode_op_hdr(xdr, OP_COMMIT);
4350        if (!status)
4351                status = decode_write_verifier(xdr, &verf->verifier);
4352        if (!status)
4353                verf->committed = NFS_FILE_SYNC;
4354        return status;
4355}
4356
4357static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4358{
4359        __be32 *p;
4360        uint32_t bmlen;
4361        int status;
4362
4363        status = decode_op_hdr(xdr, OP_CREATE);
4364        if (status)
4365                return status;
4366        if ((status = decode_change_info(xdr, cinfo)))
4367                return status;
4368        p = xdr_inline_decode(xdr, 4);
4369        if (unlikely(!p))
4370                return -EIO;
4371        bmlen = be32_to_cpup(p);
4372        p = xdr_inline_decode(xdr, bmlen << 2);
4373        if (likely(p))
4374                return 0;
4375        return -EIO;
4376}
4377
4378static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4379{
4380        unsigned int savep;
4381        uint32_t attrlen, bitmap[3] = {0};
4382        int status;
4383
4384        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4385                goto xdr_error;
4386        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4387                goto xdr_error;
4388        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4389                goto xdr_error;
4390        if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4391                goto xdr_error;
4392        if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4393                                                 &res->fh_expire_type)) != 0)
4394                goto xdr_error;
4395        if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4396                goto xdr_error;
4397        if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4398                goto xdr_error;
4399        if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4400                goto xdr_error;
4401        if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4402                                res->exclcreat_bitmask)) != 0)
4403                goto xdr_error;
4404        status = verify_attr_len(xdr, savep, attrlen);
4405xdr_error:
4406        dprintk("%s: xdr returned %d!\n", __func__, -status);
4407        return status;
4408}
4409
4410static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4411{
4412        unsigned int savep;
4413        uint32_t attrlen, bitmap[3] = {0};
4414        int status;
4415
4416        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4417                goto xdr_error;
4418        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4419                goto xdr_error;
4420        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4421                goto xdr_error;
4422
4423        if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4424                goto xdr_error;
4425        if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4426                goto xdr_error;
4427        if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4428                goto xdr_error;
4429
4430        status = -EIO;
4431        if (unlikely(bitmap[0]))
4432                goto xdr_error;
4433
4434        if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4435                goto xdr_error;
4436        if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4437                goto xdr_error;
4438        if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4439                goto xdr_error;
4440
4441        status = verify_attr_len(xdr, savep, attrlen);
4442xdr_error:
4443        dprintk("%s: xdr returned %d!\n", __func__, -status);
4444        return status;
4445}
4446
4447static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4448{
4449        unsigned int savep;
4450        uint32_t attrlen, bitmap[3] = {0};
4451        int status;
4452
4453        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4454                goto xdr_error;
4455        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4456                goto xdr_error;
4457        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4458                goto xdr_error;
4459
4460        if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4461                goto xdr_error;
4462        if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4463                goto xdr_error;
4464
4465        status = verify_attr_len(xdr, savep, attrlen);
4466xdr_error:
4467        dprintk("%s: xdr returned %d!\n", __func__, -status);
4468        return status;
4469}
4470
4471static int decode_threshold_hint(struct xdr_stream *xdr,
4472                                  uint32_t *bitmap,
4473                                  uint64_t *res,
4474                                  uint32_t hint_bit)
4475{
4476        __be32 *p;
4477
4478        *res = 0;
4479        if (likely(bitmap[0] & hint_bit)) {
4480                p = xdr_inline_decode(xdr, 8);
4481                if (unlikely(!p))
4482                        return -EIO;
4483                xdr_decode_hyper(p, res);
4484        }
4485        return 0;
4486}
4487
4488static int decode_first_threshold_item4(struct xdr_stream *xdr,
4489                                        struct nfs4_threshold *res)
4490{
4491        __be32 *p;
4492        unsigned int savep;
4493        uint32_t bitmap[3] = {0,}, attrlen;
4494        int status;
4495
4496        /* layout type */
4497        p = xdr_inline_decode(xdr, 4);
4498        if (unlikely(!p))
4499                return -EIO;
4500        res->l_type = be32_to_cpup(p);
4501
4502        /* thi_hintset bitmap */
4503        status = decode_attr_bitmap(xdr, bitmap);
4504        if (status < 0)
4505                goto xdr_error;
4506
4507        /* thi_hintlist length */
4508        status = decode_attr_length(xdr, &attrlen, &savep);
4509        if (status < 0)
4510                goto xdr_error;
4511        /* thi_hintlist */
4512        status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4513        if (status < 0)
4514                goto xdr_error;
4515        status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4516        if (status < 0)
4517                goto xdr_error;
4518        status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4519                                       THRESHOLD_RD_IO);
4520        if (status < 0)
4521                goto xdr_error;
4522        status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4523                                       THRESHOLD_WR_IO);
4524        if (status < 0)
4525                goto xdr_error;
4526
4527        status = verify_attr_len(xdr, savep, attrlen);
4528        res->bm = bitmap[0];
4529
4530        dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4531                 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4532                res->wr_io_sz);
4533xdr_error:
4534        dprintk("%s ret=%d!\n", __func__, status);
4535        return status;
4536}
4537
4538/*
4539 * Thresholds on pNFS direct I/O vrs MDS I/O
4540 */
4541static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4542                                    uint32_t *bitmap,
4543                                    struct nfs4_threshold *res)
4544{
4545        __be32 *p;
4546        int status = 0;
4547        uint32_t num;
4548
4549        if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4550                return -EIO;
4551        if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4552                /* Did the server return an unrequested attribute? */
4553                if (unlikely(res == NULL))
4554                        return -EREMOTEIO;
4555                p = xdr_inline_decode(xdr, 4);
4556                if (unlikely(!p))
4557                        return -EIO;
4558                num = be32_to_cpup(p);
4559                if (num == 0)
4560                        return 0;
4561                if (num > 1)
4562                        printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4563                                "drivers per filesystem not supported\n",
4564                                __func__);
4565
4566                status = decode_first_threshold_item4(xdr, res);
4567                bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4568        }
4569        return status;
4570}
4571
4572static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4573                struct nfs_fattr *fattr, struct nfs_fh *fh,
4574                struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4575                const struct nfs_server *server)
4576{
4577        int status;
4578        umode_t fmode = 0;
4579        uint32_t type;
4580        int32_t err;
4581
4582        status = decode_attr_type(xdr, bitmap, &type);
4583        if (status < 0)
4584                goto xdr_error;
4585        fattr->mode = 0;
4586        if (status != 0) {
4587                fattr->mode |= nfs_type2fmt[type];
4588                fattr->valid |= status;
4589        }
4590
4591        status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4592        if (status < 0)
4593                goto xdr_error;
4594        fattr->valid |= status;
4595
4596        status = decode_attr_size(xdr, bitmap, &fattr->size);
4597        if (status < 0)
4598                goto xdr_error;
4599        fattr->valid |= status;
4600
4601        status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4602        if (status < 0)
4603                goto xdr_error;
4604        fattr->valid |= status;
4605
4606        err = 0;
4607        status = decode_attr_error(xdr, bitmap, &err);
4608        if (status < 0)
4609                goto xdr_error;
4610
4611        status = decode_attr_filehandle(xdr, bitmap, fh);
4612        if (status < 0)
4613                goto xdr_error;
4614
4615        status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4616        if (status < 0)
4617                goto xdr_error;
4618        fattr->valid |= status;
4619
4620        status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4621        if (status < 0)
4622                goto xdr_error;
4623        fattr->valid |= status;
4624
4625        status = -EIO;
4626        if (unlikely(bitmap[0]))
4627                goto xdr_error;
4628
4629        status = decode_attr_mode(xdr, bitmap, &fmode);
4630        if (status < 0)
4631                goto xdr_error;
4632        if (status != 0) {
4633                fattr->mode |= fmode;
4634                fattr->valid |= status;
4635        }
4636
4637        status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4638        if (status < 0)
4639                goto xdr_error;
4640        fattr->valid |= status;
4641
4642        status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4643        if (status < 0)
4644                goto xdr_error;
4645        fattr->valid |= status;
4646
4647        status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4648        if (status < 0)
4649                goto xdr_error;
4650        fattr->valid |= status;
4651
4652        status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4653        if (status < 0)
4654                goto xdr_error;
4655        fattr->valid |= status;
4656
4657        status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4658        if (status < 0)
4659                goto xdr_error;
4660        fattr->valid |= status;
4661
4662        status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4663        if (status < 0)
4664                goto xdr_error;
4665        fattr->valid |= status;
4666
4667        status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4668        if (status < 0)
4669                goto xdr_error;
4670        fattr->valid |= status;
4671
4672        status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4673        if (status < 0)
4674                goto xdr_error;
4675        fattr->valid |= status;
4676
4677        status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4678        if (status < 0)
4679                goto xdr_error;
4680        fattr->valid |= status;
4681
4682        status = -EIO;
4683        if (unlikely(bitmap[1]))
4684                goto xdr_error;
4685
4686        status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4687        if (status < 0)
4688                goto xdr_error;
4689
4690        if (label) {
4691                status = decode_attr_security_label(xdr, bitmap, label);
4692                if (status < 0)
4693                        goto xdr_error;
4694                fattr->valid |= status;
4695        }
4696
4697xdr_error:
4698        dprintk("%s: xdr returned %d\n", __func__, -status);
4699        return status;
4700}
4701
4702static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4703                struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4704                struct nfs4_label *label, const struct nfs_server *server)
4705{
4706        unsigned int savep;
4707        uint32_t attrlen,
4708                 bitmap[3] = {0};
4709        int status;
4710
4711        status = decode_op_hdr(xdr, OP_GETATTR);
4712        if (status < 0)
4713                goto xdr_error;
4714
4715        status = decode_attr_bitmap(xdr, bitmap);
4716        if (status < 0)
4717                goto xdr_error;
4718
4719        status = decode_attr_length(xdr, &attrlen, &savep);
4720        if (status < 0)
4721                goto xdr_error;
4722
4723        status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4724                                        label, server);
4725        if (status < 0)
4726                goto xdr_error;
4727
4728        status = verify_attr_len(xdr, savep, attrlen);
4729xdr_error:
4730        dprintk("%s: xdr returned %d\n", __func__, -status);
4731        return status;
4732}
4733
4734static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4735                struct nfs4_label *label, const struct nfs_server *server)
4736{
4737        return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4738}
4739
4740static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4741                const struct nfs_server *server)
4742{
4743        return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4744}
4745
4746/*
4747 * Decode potentially multiple layout types.
4748 */
4749static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4750                                    struct nfs_fsinfo *fsinfo)
4751{
4752        __be32 *p;
4753        uint32_t i;
4754
4755        p = xdr_inline_decode(xdr, 4);
4756        if (unlikely(!p))
4757                return -EIO;
4758        fsinfo->nlayouttypes = be32_to_cpup(p);
4759
4760        /* pNFS is not supported by the underlying file system */
4761        if (fsinfo->nlayouttypes == 0)
4762                return 0;
4763
4764        /* Decode and set first layout type, move xdr->p past unused types */
4765        p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4766        if (unlikely(!p))
4767                return -EIO;
4768
4769        /* If we get too many, then just cap it at the max */
4770        if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4771                printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4772                        __func__, fsinfo->nlayouttypes);
4773                fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4774        }
4775
4776        for(i = 0; i < fsinfo->nlayouttypes; ++i)
4777                fsinfo->layouttype[i] = be32_to_cpup(p++);
4778        return 0;
4779}
4780
4781/*
4782 * The type of file system exported.
4783 * Note we must ensure that layouttype is set in any non-error case.
4784 */
4785static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4786                                struct nfs_fsinfo *fsinfo)
4787{
4788        int status = 0;
4789
4790        dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4791        if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4792                return -EIO;
4793        if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4794                status = decode_pnfs_layout_types(xdr, fsinfo);
4795                bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4796        }
4797        return status;
4798}
4799
4800/*
4801 * The prefered block size for layout directed io
4802 */
4803static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4804                                      uint32_t *res)
4805{
4806        __be32 *p;
4807
4808        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4809        *res = 0;
4810        if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4811                p = xdr_inline_decode(xdr, 4);
4812                if (unlikely(!p))
4813                        return -EIO;
4814                *res = be32_to_cpup(p);
4815                bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4816        }
4817        return 0;
4818}
4819
4820/*
4821 * The granularity of a CLONE operation.
4822 */
4823static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4824                                     uint32_t *res)
4825{
4826        __be32 *p;
4827
4828        dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4829        *res = 0;
4830        if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4831                p = xdr_inline_decode(xdr, 4);
4832                if (unlikely(!p))
4833                        return -EIO;
4834                *res = be32_to_cpup(p);
4835                bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4836        }
4837        return 0;
4838}
4839
4840static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4841{
4842        unsigned int savep;
4843        uint32_t attrlen, bitmap[3];
4844        int status;
4845
4846        if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4847                goto xdr_error;
4848        if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4849                goto xdr_error;
4850        if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4851                goto xdr_error;
4852
4853        fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4854
4855        if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4856                goto xdr_error;
4857        if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4858                goto xdr_error;
4859        if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4860                goto xdr_error;
4861        fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4862        if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4863                goto xdr_error;
4864        fsinfo->wtpref = fsinfo->wtmax;
4865
4866        status = -EIO;
4867        if (unlikely(bitmap[0]))
4868                goto xdr_error;
4869
4870        status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4871        if (status != 0)
4872                goto xdr_error;
4873        status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4874        if (status != 0)
4875                goto xdr_error;
4876
4877        status = -EIO;
4878        if (unlikely(bitmap[1]))
4879                goto xdr_error;
4880
4881        status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4882        if (status)
4883                goto xdr_error;
4884        status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4885        if (status)
4886                goto xdr_error;
4887
4888        status = decode_attr_xattrsupport(xdr, bitmap,
4889                                          &fsinfo->xattr_support);
4890        if (status)
4891                goto xdr_error;
4892
4893        status = verify_attr_len(xdr, savep, attrlen);
4894xdr_error:
4895        dprintk("%s: xdr returned %d!\n", __func__, -status);
4896        return status;
4897}
4898
4899static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4900{
4901        __be32 *p;
4902        uint32_t len;
4903        int status;
4904
4905        /* Zero handle first to allow comparisons */
4906        memset(fh, 0, sizeof(*fh));
4907
4908        status = decode_op_hdr(xdr, OP_GETFH);
4909        if (status)
4910                return status;
4911
4912        p = xdr_inline_decode(xdr, 4);
4913        if (unlikely(!p))
4914                return -EIO;
4915        len = be32_to_cpup(p);
4916        if (len > NFS4_FHSIZE)
4917                return -EIO;
4918        fh->size = len;
4919        p = xdr_inline_decode(xdr, len);
4920        if (unlikely(!p))
4921                return -EIO;
4922        memcpy(fh->data, p, len);
4923        return 0;
4924}
4925
4926static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4927{
4928        int status;
4929
4930        status = decode_op_hdr(xdr, OP_LINK);
4931        if (status)
4932                return status;
4933        return decode_change_info(xdr, cinfo);
4934}
4935
4936/*
4937 * We create the owner, so we know a proper owner.id length is 4.
4938 */
4939static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4940{
4941        uint64_t offset, length, clientid;
4942        __be32 *p;
4943        uint32_t namelen, type;
4944
4945        p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4946        if (unlikely(!p))
4947                return -EIO;
4948        p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4949        p = xdr_decode_hyper(p, &length);
4950        type = be32_to_cpup(p++); /* 4 byte read */
4951        if (fl != NULL) { /* manipulate file lock */
4952                fl->fl_start = (loff_t)offset;
4953                fl->fl_end = fl->fl_start + (loff_t)length - 1;
4954                if (length == ~(uint64_t)0)
4955                        fl->fl_end = OFFSET_MAX;
4956                fl->fl_type = F_WRLCK;
4957                if (type & 1)
4958                        fl->fl_type = F_RDLCK;
4959                fl->fl_pid = 0;
4960        }
4961        p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4962        namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4963        p = xdr_inline_decode(xdr, namelen); /* variable size field */
4964        if (likely(!p))
4965                return -EIO;
4966        return -NFS4ERR_DENIED;
4967}
4968
4969static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4970{
4971        int status;
4972
4973        status = decode_op_hdr(xdr, OP_LOCK);
4974        if (status == -EIO)
4975                goto out;
4976        if (status == 0) {
4977                status = decode_lock_stateid(xdr, &res->stateid);
4978                if (unlikely(status))
4979                        goto out;
4980        } else if (status == -NFS4ERR_DENIED)
4981                status = decode_lock_denied(xdr, NULL);
4982        if (res->open_seqid != NULL)
4983                nfs_increment_open_seqid(status, res->open_seqid);
4984        nfs_increment_lock_seqid(status, res->lock_seqid);
4985out:
4986        return status;
4987}
4988
4989static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4990{
4991        int status;
4992        status = decode_op_hdr(xdr, OP_LOCKT);
4993        if (status == -NFS4ERR_DENIED)
4994                return decode_lock_denied(xdr, res->denied);
4995        return status;
4996}
4997
4998static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4999{
5000        int status;

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

6001
6002static int decode_test_stateid(struct xdr_stream *xdr,
6003                               struct nfs41_test_stateid_res *res)
6004{
6005        __be32 *p;
6006        int status;
6007        int num_res;
6008
6009        status = decode_op_hdr(xdr, OP_TEST_STATEID);
6010        if (status)
6011                return status;
6012
6013        p = xdr_inline_decode(xdr, 4);
6014        if (unlikely(!p))
6015                return -EIO;
6016        num_res = be32_to_cpup(p++);
6017        if (num_res != 1)
6018                return -EIO;
6019
6020        p = xdr_inline_decode(xdr, 4);
6021        if (unlikely(!p))
6022                return -EIO;
6023        res->status = be32_to_cpup(p++);
6024
6025        return status;
6026}
6027
6028static int decode_free_stateid(struct xdr_stream *xdr,
6029                               struct nfs41_free_stateid_res *res)
6030{
6031        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6032        return res->status;
6033}
6034#else
6035static inline
6036int decode_layoutreturn(struct xdr_stream *xdr,
6037                               struct nfs4_layoutreturn_res *res)
6038{
6039        return 0;
6040}
6041
6042static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6043                            struct nfs4_layoutget_res *res)
6044{
6045        return 0;
6046}
6047
6048#endif /* CONFIG_NFS_V4_1 */
6049
6050/*
6051 * END OF "GENERIC" DECODE ROUTINES.
6052 */
6053
6054/*
6055 * Decode OPEN_DOWNGRADE response
6056 */
6057static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6058                                       struct xdr_stream *xdr,
6059                                       void *data)
6060{
6061        struct nfs_closeres *res = data;
6062        struct compound_hdr hdr;
6063        int status;
6064
6065        status = decode_compound_hdr(xdr, &hdr);
6066        if (status)
6067                goto out;
6068        status = decode_sequence(xdr, &res->seq_res, rqstp);
6069        if (status)
6070                goto out;
6071        status = decode_putfh(xdr);
6072        if (status)
6073                goto out;
6074        if (res->lr_res) {
6075                status = decode_layoutreturn(xdr, res->lr_res);
6076                res->lr_ret = status;
6077                if (status)
6078                        goto out;
6079        }
6080        status = decode_open_downgrade(xdr, res);
6081out:
6082        return status;
6083}
6084
6085/*
6086 * Decode ACCESS response
6087 */
6088static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6089                               void *data)
6090{
6091        struct nfs4_accessres *res = data;
6092        struct compound_hdr hdr;
6093        int status;
6094
6095        status = decode_compound_hdr(xdr, &hdr);
6096        if (status)
6097                goto out;
6098        status = decode_sequence(xdr, &res->seq_res, rqstp);
6099        if (status)
6100                goto out;
6101        status = decode_putfh(xdr);
6102        if (status != 0)
6103                goto out;
6104        status = decode_access(xdr, &res->supported, &res->access);
6105        if (status != 0)
6106                goto out;
6107        if (res->fattr)
6108                decode_getfattr(xdr, res->fattr, res->server);
6109out:
6110        return status;
6111}
6112
6113/*
6114 * Decode LOOKUP response
6115 */
6116static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6117                               void *data)
6118{
6119        struct nfs4_lookup_res *res = data;
6120        struct compound_hdr hdr;
6121        int status;
6122
6123        status = decode_compound_hdr(xdr, &hdr);
6124        if (status)
6125                goto out;
6126        status = decode_sequence(xdr, &res->seq_res, rqstp);
6127        if (status)
6128                goto out;
6129        status = decode_putfh(xdr);
6130        if (status)
6131                goto out;
6132        status = decode_lookup(xdr);
6133        if (status)
6134                goto out;
6135        status = decode_getfh(xdr, res->fh);
6136        if (status)
6137                goto out;
6138        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6139out:
6140        return status;
6141}
6142
6143/*
6144 * Decode LOOKUPP response
6145 */
6146static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6147                void *data)
6148{
6149        struct nfs4_lookupp_res *res = data;
6150        struct compound_hdr hdr;
6151        int status;
6152
6153        status = decode_compound_hdr(xdr, &hdr);
6154        if (status)
6155                goto out;
6156        status = decode_sequence(xdr, &res->seq_res, rqstp);
6157        if (status)
6158                goto out;
6159        status = decode_putfh(xdr);
6160        if (status)
6161                goto out;
6162        status = decode_lookupp(xdr);
6163        if (status)
6164                goto out;
6165        status = decode_getfh(xdr, res->fh);
6166        if (status)
6167                goto out;
6168        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6169out:
6170        return status;
6171}
6172
6173/*
6174 * Decode LOOKUP_ROOT response
6175 */
6176static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6177                                    struct xdr_stream *xdr,
6178                                    void *data)
6179{
6180        struct nfs4_lookup_res *res = data;
6181        struct compound_hdr hdr;
6182        int status;
6183
6184        status = decode_compound_hdr(xdr, &hdr);
6185        if (status)
6186                goto out;
6187        status = decode_sequence(xdr, &res->seq_res, rqstp);
6188        if (status)
6189                goto out;
6190        status = decode_putrootfh(xdr);
6191        if (status)
6192                goto out;
6193        status = decode_getfh(xdr, res->fh);
6194        if (status == 0)
6195                status = decode_getfattr_label(xdr, res->fattr,
6196                                                res->label, res->server);
6197out:
6198        return status;
6199}
6200
6201/*
6202 * Decode REMOVE response
6203 */
6204static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6205                               void *data)
6206{
6207        struct nfs_removeres *res = data;
6208        struct compound_hdr hdr;
6209        int status;
6210
6211        status = decode_compound_hdr(xdr, &hdr);
6212        if (status)
6213                goto out;
6214        status = decode_sequence(xdr, &res->seq_res, rqstp);
6215        if (status)
6216                goto out;
6217        status = decode_putfh(xdr);
6218        if (status)
6219                goto out;
6220        status = decode_remove(xdr, &res->cinfo);
6221out:
6222        return status;
6223}
6224
6225/*
6226 * Decode RENAME response
6227 */
6228static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6229                               void *data)
6230{
6231        struct nfs_renameres *res = data;
6232        struct compound_hdr hdr;
6233        int status;
6234
6235        status = decode_compound_hdr(xdr, &hdr);
6236        if (status)
6237                goto out;
6238        status = decode_sequence(xdr, &res->seq_res, rqstp);
6239        if (status)
6240                goto out;
6241        status = decode_putfh(xdr);
6242        if (status)
6243                goto out;
6244        status = decode_savefh(xdr);
6245        if (status)
6246                goto out;
6247        status = decode_putfh(xdr);
6248        if (status)
6249                goto out;
6250        status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6251out:
6252        return status;
6253}
6254
6255/*
6256 * Decode LINK response
6257 */
6258static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6259                             void *data)
6260{
6261        struct nfs4_link_res *res = data;
6262        struct compound_hdr hdr;
6263        int status;
6264
6265        status = decode_compound_hdr(xdr, &hdr);
6266        if (status)
6267                goto out;
6268        status = decode_sequence(xdr, &res->seq_res, rqstp);
6269        if (status)
6270                goto out;
6271        status = decode_putfh(xdr);
6272        if (status)
6273                goto out;
6274        status = decode_savefh(xdr);
6275        if (status)
6276                goto out;
6277        status = decode_putfh(xdr);
6278        if (status)
6279                goto out;
6280        status = decode_link(xdr, &res->cinfo);
6281        if (status)
6282                goto out;
6283        /*
6284         * Note order: OP_LINK leaves the directory as the current
6285         *             filehandle.
6286         */
6287        status = decode_restorefh(xdr);
6288        if (status)
6289                goto out;
6290        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6291out:
6292        return status;
6293}
6294
6295/*
6296 * Decode CREATE response
6297 */
6298static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299                               void *data)
6300{
6301        struct nfs4_create_res *res = data;
6302        struct compound_hdr hdr;
6303        int status;
6304
6305        status = decode_compound_hdr(xdr, &hdr);
6306        if (status)
6307                goto out;
6308        status = decode_sequence(xdr, &res->seq_res, rqstp);
6309        if (status)
6310                goto out;
6311        status = decode_putfh(xdr);
6312        if (status)
6313                goto out;
6314        status = decode_create(xdr, &res->dir_cinfo);
6315        if (status)
6316                goto out;
6317        status = decode_getfh(xdr, res->fh);
6318        if (status)
6319                goto out;
6320        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6321out:
6322        return status;
6323}
6324
6325/*
6326 * Decode SYMLINK response
6327 */
6328static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329                                void *res)
6330{
6331        return nfs4_xdr_dec_create(rqstp, xdr, res);
6332}
6333
6334/*
6335 * Decode GETATTR response
6336 */
6337static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6338                                void *data)
6339{
6340        struct nfs4_getattr_res *res = data;
6341        struct compound_hdr hdr;
6342        int status;
6343
6344        status = decode_compound_hdr(xdr, &hdr);
6345        if (status)
6346                goto out;
6347        status = decode_sequence(xdr, &res->seq_res, rqstp);
6348        if (status)
6349                goto out;
6350        status = decode_putfh(xdr);
6351        if (status)
6352                goto out;
6353        status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6354out:
6355        return status;
6356}
6357
6358/*
6359 * Encode an SETACL request
6360 */
6361static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6362                                const void *data)
6363{
6364        const struct nfs_setaclargs *args = data;
6365        struct compound_hdr hdr = {
6366                .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6367        };
6368
6369        encode_compound_hdr(xdr, req, &hdr);
6370        encode_sequence(xdr, &args->seq_args, &hdr);
6371        encode_putfh(xdr, args->fh, &hdr);
6372        encode_setacl(xdr, args, &hdr);
6373        encode_nops(&hdr);
6374}
6375
6376/*
6377 * Decode SETACL response
6378 */
6379static int
6380nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6381                    void *data)
6382{
6383        struct nfs_setaclres *res = data;
6384        struct compound_hdr hdr;
6385        int status;
6386
6387        status = decode_compound_hdr(xdr, &hdr);
6388        if (status)
6389                goto out;
6390        status = decode_sequence(xdr, &res->seq_res, rqstp);
6391        if (status)
6392                goto out;
6393        status = decode_putfh(xdr);
6394        if (status)
6395                goto out;
6396        status = decode_setattr(xdr);
6397out:
6398        return status;
6399}
6400
6401/*
6402 * Decode GETACL response
6403 */
6404static int
6405nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406                    void *data)
6407{
6408        struct nfs_getaclres *res = data;
6409        struct compound_hdr hdr;
6410        int status;
6411
6412        if (res->acl_scratch != NULL)
6413                xdr_set_scratch_page(xdr, res->acl_scratch);
6414        status = decode_compound_hdr(xdr, &hdr);
6415        if (status)
6416                goto out;
6417        status = decode_sequence(xdr, &res->seq_res, rqstp);
6418        if (status)
6419                goto out;
6420        status = decode_putfh(xdr);
6421        if (status)
6422                goto out;
6423        status = decode_getacl(xdr, rqstp, res);
6424
6425out:
6426        return status;
6427}
6428
6429/*
6430 * Decode CLOSE response
6431 */
6432static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433                              void *data)
6434{
6435        struct nfs_closeres *res = data;
6436        struct compound_hdr hdr;
6437        int status;
6438
6439        status = decode_compound_hdr(xdr, &hdr);
6440        if (status)
6441                goto out;
6442        status = decode_sequence(xdr, &res->seq_res, rqstp);
6443        if (status)
6444                goto out;
6445        status = decode_putfh(xdr);
6446        if (status)
6447                goto out;
6448        if (res->lr_res) {
6449                status = decode_layoutreturn(xdr, res->lr_res);
6450                res->lr_ret = status;
6451                if (status)
6452                        goto out;
6453        }
6454        if (res->fattr != NULL) {
6455                status = decode_getfattr(xdr, res->fattr, res->server);
6456                if (status != 0)
6457                        goto out;
6458        }
6459        status = decode_close(xdr, res);
6460out:
6461        return status;
6462}
6463
6464/*
6465 * Decode OPEN response
6466 */
6467static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468                             void *data)
6469{
6470        struct nfs_openres *res = data;
6471        struct compound_hdr hdr;
6472        int status;
6473
6474        status = decode_compound_hdr(xdr, &hdr);
6475        if (status)
6476                goto out;
6477        status = decode_sequence(xdr, &res->seq_res, rqstp);
6478        if (status)
6479                goto out;
6480        status = decode_putfh(xdr);
6481        if (status)
6482                goto out;
6483        status = decode_open(xdr, res);
6484        if (status)
6485                goto out;
6486        status = decode_getfh(xdr, &res->fh);
6487        if (status)
6488                goto out;
6489        if (res->access_request)
6490                decode_access(xdr, &res->access_supported, &res->access_result);
6491        decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6492        if (res->lg_res)
6493                decode_layoutget(xdr, rqstp, res->lg_res);
6494out:
6495        return status;
6496}
6497
6498/*
6499 * Decode OPEN_CONFIRM response
6500 */
6501static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502                                     struct xdr_stream *xdr,
6503                                     void *data)
6504{
6505        struct nfs_open_confirmres *res = data;
6506        struct compound_hdr hdr;
6507        int status;
6508
6509        status = decode_compound_hdr(xdr, &hdr);
6510        if (status)
6511                goto out;
6512        status = decode_putfh(xdr);
6513        if (status)
6514                goto out;
6515        status = decode_open_confirm(xdr, res);
6516out:
6517        return status;
6518}
6519
6520/*
6521 * Decode OPEN response
6522 */
6523static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6524                                    struct xdr_stream *xdr,
6525                                    void *data)
6526{
6527        struct nfs_openres *res = data;
6528        struct compound_hdr hdr;
6529        int status;
6530
6531        status = decode_compound_hdr(xdr, &hdr);
6532        if (status)
6533                goto out;
6534        status = decode_sequence(xdr, &res->seq_res, rqstp);
6535        if (status)
6536                goto out;
6537        status = decode_putfh(xdr);
6538        if (status)
6539                goto out;
6540        status = decode_open(xdr, res);
6541        if (status)
6542                goto out;
6543        if (res->access_request)
6544                decode_access(xdr, &res->access_supported, &res->access_result);
6545        decode_getfattr(xdr, res->f_attr, res->server);
6546        if (res->lg_res)
6547                decode_layoutget(xdr, rqstp, res->lg_res);
6548out:
6549        return status;
6550}
6551
6552/*
6553 * Decode SETATTR response
6554 */
6555static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6556                                struct xdr_stream *xdr,
6557                                void *data)
6558{
6559        struct nfs_setattrres *res = data;
6560        struct compound_hdr hdr;
6561        int status;
6562
6563        status = decode_compound_hdr(xdr, &hdr);
6564        if (status)
6565                goto out;
6566        status = decode_sequence(xdr, &res->seq_res, rqstp);
6567        if (status)
6568                goto out;
6569        status = decode_putfh(xdr);
6570        if (status)
6571                goto out;
6572        status = decode_setattr(xdr);
6573        if (status)
6574                goto out;
6575        decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6576out:
6577        return status;
6578}
6579
6580/*
6581 * Decode LOCK response
6582 */
6583static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584                             void *data)
6585{
6586        struct nfs_lock_res *res = data;
6587        struct compound_hdr hdr;
6588        int status;
6589
6590        status = decode_compound_hdr(xdr, &hdr);
6591        if (status)
6592                goto out;
6593        status = decode_sequence(xdr, &res->seq_res, rqstp);
6594        if (status)
6595                goto out;
6596        status = decode_putfh(xdr);
6597        if (status)
6598                goto out;
6599        status = decode_lock(xdr, res);
6600out:
6601        return status;
6602}
6603
6604/*
6605 * Decode LOCKT response
6606 */
6607static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6608                              void *data)
6609{
6610        struct nfs_lockt_res *res = data;
6611        struct compound_hdr hdr;
6612        int status;
6613
6614        status = decode_compound_hdr(xdr, &hdr);
6615        if (status)
6616                goto out;
6617        status = decode_sequence(xdr, &res->seq_res, rqstp);
6618        if (status)
6619                goto out;
6620        status = decode_putfh(xdr);
6621        if (status)
6622                goto out;
6623        status = decode_lockt(xdr, res);
6624out:
6625        return status;
6626}
6627
6628/*
6629 * Decode LOCKU response
6630 */
6631static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6632                              void *data)
6633{
6634        struct nfs_locku_res *res = data;
6635        struct compound_hdr hdr;
6636        int status;
6637
6638        status = decode_compound_hdr(xdr, &hdr);
6639        if (status)
6640                goto out;
6641        status = decode_sequence(xdr, &res->seq_res, rqstp);
6642        if (status)
6643                goto out;
6644        status = decode_putfh(xdr);
6645        if (status)
6646                goto out;
6647        status = decode_locku(xdr, res);
6648out:
6649        return status;
6650}
6651
6652static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6653                                          struct xdr_stream *xdr, void *dummy)
6654{
6655        struct compound_hdr hdr;
6656        int status;
6657
6658        status = decode_compound_hdr(xdr, &hdr);
6659        if (!status)
6660                status = decode_release_lockowner(xdr);
6661        return status;
6662}
6663
6664/*
6665 * Decode READLINK response
6666 */
6667static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6668                                 struct xdr_stream *xdr,
6669                                 void *data)
6670{
6671        struct nfs4_readlink_res *res = data;
6672        struct compound_hdr hdr;
6673        int status;
6674
6675        status = decode_compound_hdr(xdr, &hdr);
6676        if (status)
6677                goto out;
6678        status = decode_sequence(xdr, &res->seq_res, rqstp);
6679        if (status)
6680                goto out;
6681        status = decode_putfh(xdr);
6682        if (status)
6683                goto out;
6684        status = decode_readlink(xdr, rqstp);
6685out:
6686        return status;
6687}
6688
6689/*
6690 * Decode READDIR response
6691 */
6692static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693                                void *data)
6694{
6695        struct nfs4_readdir_res *res = data;
6696        struct compound_hdr hdr;
6697        int status;
6698
6699        status = decode_compound_hdr(xdr, &hdr);
6700        if (status)
6701                goto out;
6702        status = decode_sequence(xdr, &res->seq_res, rqstp);
6703        if (status)
6704                goto out;
6705        status = decode_putfh(xdr);
6706        if (status)
6707                goto out;
6708        status = decode_readdir(xdr, rqstp, res);
6709out:
6710        return status;
6711}
6712
6713/*
6714 * Decode Read response
6715 */
6716static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717                             void *data)
6718{
6719        struct nfs_pgio_res *res = data;
6720        struct compound_hdr hdr;
6721        int status;
6722
6723        status = decode_compound_hdr(xdr, &hdr);
6724        res->op_status = hdr.status;
6725        if (status)
6726                goto out;
6727        status = decode_sequence(xdr, &res->seq_res, rqstp);
6728        if (status)
6729                goto out;
6730        status = decode_putfh(xdr);
6731        if (status)
6732                goto out;
6733        status = decode_read(xdr, rqstp, res);
6734        if (!status)
6735                status = res->count;
6736out:
6737        return status;
6738}
6739
6740/*
6741 * Decode WRITE response
6742 */
6743static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6744                              void *data)
6745{
6746        struct nfs_pgio_res *res = data;
6747        struct compound_hdr hdr;
6748        int status;
6749
6750        status = decode_compound_hdr(xdr, &hdr);
6751        res->op_status = hdr.status;
6752        if (status)
6753                goto out;
6754        status = decode_sequence(xdr, &res->seq_res, rqstp);
6755        if (status)
6756                goto out;
6757        status = decode_putfh(xdr);
6758        if (status)
6759                goto out;
6760        status = decode_write(xdr, res);
6761        if (status)
6762                goto out;
6763        if (res->fattr)
6764                decode_getfattr(xdr, res->fattr, res->server);
6765        if (!status)
6766                status = res->count;
6767out:
6768        return status;
6769}
6770
6771/*
6772 * Decode COMMIT response
6773 */
6774static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775                               void *data)
6776{
6777        struct nfs_commitres *res = data;
6778        struct compound_hdr hdr;
6779        int status;
6780
6781        status = decode_compound_hdr(xdr, &hdr);
6782        res->op_status = hdr.status;
6783        if (status)
6784                goto out;
6785        status = decode_sequence(xdr, &res->seq_res, rqstp);
6786        if (status)
6787                goto out;
6788        status = decode_putfh(xdr);
6789        if (status)
6790                goto out;
6791        status = decode_commit(xdr, res);
6792out:
6793        return status;
6794}
6795
6796/*
6797 * Decode FSINFO response
6798 */
6799static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6800                               void *data)
6801{
6802        struct nfs4_fsinfo_res *res = data;
6803        struct compound_hdr hdr;
6804        int status;
6805
6806        status = decode_compound_hdr(xdr, &hdr);
6807        if (!status)
6808                status = decode_sequence(xdr, &res->seq_res, req);
6809        if (!status)
6810                status = decode_putfh(xdr);
6811        if (!status)
6812                status = decode_fsinfo(xdr, res->fsinfo);
6813        return status;
6814}
6815
6816/*
6817 * Decode PATHCONF response
6818 */
6819static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6820                                 void *data)
6821{
6822        struct nfs4_pathconf_res *res = data;
6823        struct compound_hdr hdr;
6824        int status;
6825
6826        status = decode_compound_hdr(xdr, &hdr);
6827        if (!status)
6828                status = decode_sequence(xdr, &res->seq_res, req);
6829        if (!status)
6830                status = decode_putfh(xdr);
6831        if (!status)
6832                status = decode_pathconf(xdr, res->pathconf);
6833        return status;
6834}
6835
6836/*
6837 * Decode STATFS response
6838 */
6839static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6840                               void *data)
6841{
6842        struct nfs4_statfs_res *res = data;
6843        struct compound_hdr hdr;
6844        int status;
6845
6846        status = decode_compound_hdr(xdr, &hdr);
6847        if (!status)
6848                status = decode_sequence(xdr, &res->seq_res, req);
6849        if (!status)
6850                status = decode_putfh(xdr);
6851        if (!status)
6852                status = decode_statfs(xdr, res->fsstat);
6853        return status;
6854}
6855
6856/*
6857 * Decode GETATTR_BITMAP response
6858 */
6859static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6860                                    struct xdr_stream *xdr,
6861                                    void *data)
6862{
6863        struct nfs4_server_caps_res *res = data;
6864        struct compound_hdr hdr;
6865        int status;
6866
6867        status = decode_compound_hdr(xdr, &hdr);
6868        if (status)
6869                goto out;
6870        status = decode_sequence(xdr, &res->seq_res, req);
6871        if (status)
6872                goto out;
6873        status = decode_putfh(xdr);
6874        if (status)
6875                goto out;
6876        status = decode_server_caps(xdr, res);
6877out:
6878        return status;
6879}
6880
6881/*
6882 * Decode RENEW response
6883 */
6884static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885                              void *__unused)
6886{
6887        struct compound_hdr hdr;
6888        int status;
6889
6890        status = decode_compound_hdr(xdr, &hdr);
6891        if (!status)
6892                status = decode_renew(xdr);
6893        return status;
6894}
6895
6896/*
6897 * Decode SETCLIENTID response
6898 */
6899static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6900                                    struct xdr_stream *xdr,
6901                                    void *data)
6902{
6903        struct nfs4_setclientid_res *res = data;
6904        struct compound_hdr hdr;
6905        int status;
6906
6907        status = decode_compound_hdr(xdr, &hdr);
6908        if (!status)
6909                status = decode_setclientid(xdr, res);
6910        return status;
6911}
6912
6913/*
6914 * Decode SETCLIENTID_CONFIRM response
6915 */
6916static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6917                                            struct xdr_stream *xdr,
6918                                            void *data)
6919{
6920        struct compound_hdr hdr;
6921        int status;
6922
6923        status = decode_compound_hdr(xdr, &hdr);
6924        if (!status)
6925                status = decode_setclientid_confirm(xdr);
6926        return status;
6927}
6928
6929/*
6930 * Decode DELEGRETURN response
6931 */
6932static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6933                                    struct xdr_stream *xdr,
6934                                    void *data)
6935{
6936        struct nfs4_delegreturnres *res = data;
6937        struct compound_hdr hdr;
6938        int status;
6939
6940        status = decode_compound_hdr(xdr, &hdr);
6941        if (status)
6942                goto out;
6943        status = decode_sequence(xdr, &res->seq_res, rqstp);
6944        if (status)
6945                goto out;
6946        status = decode_putfh(xdr);
6947        if (status != 0)
6948                goto out;
6949        if (res->lr_res) {
6950                status = decode_layoutreturn(xdr, res->lr_res);
6951                res->lr_ret = status;
6952                if (status)
6953                        goto out;
6954        }
6955        if (res->fattr) {
6956                status = decode_getfattr(xdr, res->fattr, res->server);
6957                if (status != 0)
6958                        goto out;
6959        }
6960        status = decode_delegreturn(xdr);
6961out:
6962        return status;
6963}
6964
6965/*
6966 * Decode FS_LOCATIONS response
6967 */
6968static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6969                                     struct xdr_stream *xdr,
6970                                     void *data)
6971{
6972        struct nfs4_fs_locations_res *res = data;
6973        struct compound_hdr hdr;
6974        int status;
6975
6976        status = decode_compound_hdr(xdr, &hdr);
6977        if (status)
6978                goto out;
6979        status = decode_sequence(xdr, &res->seq_res, req);
6980        if (status)
6981                goto out;
6982        status = decode_putfh(xdr);
6983        if (status)
6984                goto out;
6985        if (res->migration) {
6986                xdr_enter_page(xdr, PAGE_SIZE);
6987                status = decode_getfattr_generic(xdr,
6988                                        &res->fs_locations->fattr,
6989                                         NULL, res->fs_locations,
6990                                         NULL, res->fs_locations->server);
6991                if (status)
6992                        goto out;
6993                if (res->renew)
6994                        status = decode_renew(xdr);
6995        } else {
6996                status = decode_lookup(xdr);
6997                if (status)
6998                        goto out;
6999                xdr_enter_page(xdr, PAGE_SIZE);
7000                status = decode_getfattr_generic(xdr,

7001                                        &res->fs_locations->fattr,
7002                                         NULL, res->fs_locations,
7003                                         NULL, res->fs_locations->server);
7004        }
7005out:
7006        return status;
7007}
7008
7009/*
7010 * Decode SECINFO response
7011 */
7012static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7013                                struct xdr_stream *xdr,
7014                                void *data)
7015{
7016        struct nfs4_secinfo_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, rqstp);
7024        if (status)
7025                goto out;
7026        status = decode_putfh(xdr);
7027        if (status)
7028                goto out;
7029        status = decode_secinfo(xdr, res);
7030out:
7031        return status;
7032}
7033
7034/*
7035 * Decode FSID_PRESENT response
7036 */
7037static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7038                                     struct xdr_stream *xdr,
7039                                     void *data)
7040{
7041        struct nfs4_fsid_present_res *res = data;
7042        struct compound_hdr hdr;
7043        int status;
7044
7045        status = decode_compound_hdr(xdr, &hdr);
7046        if (status)
7047                goto out;
7048        status = decode_sequence(xdr, &res->seq_res, rqstp);
7049        if (status)
7050                goto out;
7051        status = decode_putfh(xdr);
7052        if (status)
7053                goto out;
7054        status = decode_getfh(xdr, res->fh);
7055        if (status)
7056                goto out;
7057        if (res->renew)
7058                status = decode_renew(xdr);
7059out:
7060        return status;
7061}
7062
7063#if defined(CONFIG_NFS_V4_1)
7064/*
7065 * Decode BIND_CONN_TO_SESSION response
7066 */
7067static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7068                                        struct xdr_stream *xdr,
7069                                        void *res)
7070{
7071        struct compound_hdr hdr;
7072        int status;
7073
7074        status = decode_compound_hdr(xdr, &hdr);
7075        if (!status)
7076                status = decode_bind_conn_to_session(xdr, res);
7077        return status;
7078}
7079
7080/*
7081 * Decode EXCHANGE_ID response
7082 */
7083static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7084                                    struct xdr_stream *xdr,
7085                                    void *res)
7086{
7087        struct compound_hdr hdr;
7088        int status;
7089
7090        status = decode_compound_hdr(xdr, &hdr);
7091        if (!status)
7092                status = decode_exchange_id(xdr, res);
7093        return status;
7094}
7095
7096/*
7097 * Decode CREATE_SESSION response
7098 */
7099static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7100                                       struct xdr_stream *xdr,
7101                                       void *res)
7102{
7103        struct compound_hdr hdr;
7104        int status;
7105
7106        status = decode_compound_hdr(xdr, &hdr);
7107        if (!status)
7108                status = decode_create_session(xdr, res);
7109        return status;
7110}
7111
7112/*
7113 * Decode DESTROY_SESSION response
7114 */
7115static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7116                                        struct xdr_stream *xdr,
7117                                        void *res)
7118{
7119        struct compound_hdr hdr;
7120        int status;
7121
7122        status = decode_compound_hdr(xdr, &hdr);
7123        if (!status)
7124                status = decode_destroy_session(xdr, res);
7125        return status;
7126}
7127
7128/*
7129 * Decode DESTROY_CLIENTID response
7130 */
7131static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7132                                        struct xdr_stream *xdr,
7133                                        void *res)
7134{
7135        struct compound_hdr hdr;
7136        int status;
7137
7138        status = decode_compound_hdr(xdr, &hdr);
7139        if (!status)
7140                status = decode_destroy_clientid(xdr, res);
7141        return status;
7142}
7143
7144/*
7145 * Decode SEQUENCE response
7146 */
7147static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7148                                 struct xdr_stream *xdr,
7149                                 void *res)
7150{
7151        struct compound_hdr hdr;
7152        int status;
7153
7154        status = decode_compound_hdr(xdr, &hdr);
7155        if (!status)
7156                status = decode_sequence(xdr, res, rqstp);
7157        return status;
7158}
7159
7160#endif
7161
7162/*
7163 * Decode GET_LEASE_TIME response
7164 */
7165static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7166                                       struct xdr_stream *xdr,
7167                                       void *data)
7168{
7169        struct nfs4_get_lease_time_res *res = data;
7170        struct compound_hdr hdr;
7171        int status;
7172
7173        status = decode_compound_hdr(xdr, &hdr);
7174        if (!status)
7175                status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7176        if (!status)
7177                status = decode_putrootfh(xdr);
7178        if (!status)
7179                status = decode_fsinfo(xdr, res->lr_fsinfo);
7180        return status;
7181}
7182
7183#ifdef CONFIG_NFS_V4_1
7184
7185/*
7186 * Decode RECLAIM_COMPLETE response
7187 */
7188static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7189                                         struct xdr_stream *xdr,
7190                                         void *data)
7191{
7192        struct nfs41_reclaim_complete_res *res = data;
7193        struct compound_hdr hdr;
7194        int status;
7195
7196        status = decode_compound_hdr(xdr, &hdr);
7197        if (!status)
7198                status = decode_sequence(xdr, &res->seq_res, rqstp);
7199        if (!status)
7200                status = decode_reclaim_complete(xdr, NULL);
7201        return status;
7202}
7203
7204/*
7205 * Decode GETDEVINFO response
7206 */
7207static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7208                                      struct xdr_stream *xdr,
7209                                      void *data)
7210{
7211        struct nfs4_getdeviceinfo_res *res = data;
7212        struct compound_hdr hdr;
7213        int status;
7214
7215        status = decode_compound_hdr(xdr, &hdr);
7216        if (status != 0)
7217                goto out;
7218        status = decode_sequence(xdr, &res->seq_res, rqstp);
7219        if (status != 0)
7220                goto out;
7221        status = decode_getdeviceinfo(xdr, res);
7222out:
7223        return status;
7224}
7225
7226/*
7227 * Decode LAYOUTGET response
7228 */
7229static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7230                                  struct xdr_stream *xdr,
7231                                  void *data)
7232{
7233        struct nfs4_layoutget_res *res = data;
7234        struct compound_hdr hdr;
7235        int status;
7236
7237        status = decode_compound_hdr(xdr, &hdr);
7238        if (status)
7239                goto out;
7240        status = decode_sequence(xdr, &res->seq_res, rqstp);
7241        if (status)
7242                goto out;
7243        status = decode_putfh(xdr);
7244        if (status)
7245                goto out;
7246        status = decode_layoutget(xdr, rqstp, res);
7247out:
7248        return status;
7249}
7250
7251/*
7252 * Decode LAYOUTRETURN response
7253 */
7254static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7255                                     struct xdr_stream *xdr,
7256                                     void *data)
7257{
7258        struct nfs4_layoutreturn_res *res = data;
7259        struct compound_hdr hdr;
7260        int status;
7261
7262        status = decode_compound_hdr(xdr, &hdr);
7263        if (status)
7264                goto out;
7265        status = decode_sequence(xdr, &res->seq_res, rqstp);
7266        if (status)
7267                goto out;
7268        status = decode_putfh(xdr);
7269        if (status)
7270                goto out;
7271        status = decode_layoutreturn(xdr, res);
7272out:
7273        return status;
7274}
7275
7276/*
7277 * Decode LAYOUTCOMMIT response
7278 */
7279static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280                                     struct xdr_stream *xdr,
7281                                     void *data)
7282{
7283        struct nfs4_layoutcommit_res *res = data;
7284        struct compound_hdr hdr;
7285        int status;
7286
7287        status = decode_compound_hdr(xdr, &hdr);
7288        if (status)
7289                goto out;
7290        status = decode_sequence(xdr, &res->seq_res, rqstp);
7291        if (status)
7292                goto out;
7293        status = decode_putfh(xdr);
7294        if (status)
7295                goto out;
7296        status = decode_layoutcommit(xdr, rqstp, res);
7297        if (status)
7298                goto out;
7299        decode_getfattr(xdr, res->fattr, res->server);
7300out:
7301        return status;
7302}
7303
7304/*
7305 * Decode SECINFO_NO_NAME response
7306 */
7307static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7308                                        struct xdr_stream *xdr,
7309                                        void *data)
7310{
7311        struct nfs4_secinfo_res *res = data;
7312        struct compound_hdr hdr;
7313        int status;
7314
7315        status = decode_compound_hdr(xdr, &hdr);
7316        if (status)
7317                goto out;
7318        status = decode_sequence(xdr, &res->seq_res, rqstp);
7319        if (status)
7320                goto out;
7321        status = decode_putrootfh(xdr);
7322        if (status)
7323                goto out;
7324        status = decode_secinfo_no_name(xdr, res);
7325out:
7326        return status;
7327}
7328
7329/*
7330 * Decode TEST_STATEID response
7331 */
7332static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7333                                     struct xdr_stream *xdr,
7334                                     void *data)
7335{
7336        struct nfs41_test_stateid_res *res = data;
7337        struct compound_hdr hdr;
7338        int status;
7339
7340        status = decode_compound_hdr(xdr, &hdr);
7341        if (status)
7342                goto out;
7343        status = decode_sequence(xdr, &res->seq_res, rqstp);
7344        if (status)
7345                goto out;
7346        status = decode_test_stateid(xdr, res);
7347out:
7348        return status;
7349}
7350
7351/*
7352 * Decode FREE_STATEID response
7353 */
7354static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7355                                     struct xdr_stream *xdr,
7356                                     void *data)
7357{
7358        struct nfs41_free_stateid_res *res = data;
7359        struct compound_hdr hdr;
7360        int status;
7361
7362        status = decode_compound_hdr(xdr, &hdr);
7363        if (status)
7364                goto out;
7365        status = decode_sequence(xdr, &res->seq_res, rqstp);
7366        if (status)
7367                goto out;
7368        status = decode_free_stateid(xdr, res);
7369out:
7370        return status;
7371}
7372#endif /* CONFIG_NFS_V4_1 */
7373
7374/**
7375 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7376 *                      the local page cache.
7377 * @xdr: XDR stream where entry resides
7378 * @entry: buffer to fill in with entry data
7379 * @plus: boolean indicating whether this should be a readdirplus entry
7380 *
7381 * Returns zero if successful, otherwise a negative errno value is
7382 * returned.
7383 *
7384 * This function is not invoked during READDIR reply decoding, but
7385 * rather whenever an application invokes the getdents(2) system call
7386 * on a directory already in our cache.
7387 */
7388int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7389                       bool plus)
7390{
7391        unsigned int savep;
7392        uint32_t bitmap[3] = {0};
7393        uint32_t len;
7394        uint64_t new_cookie;
7395        __be32 *p = xdr_inline_decode(xdr, 4);
7396        if (unlikely(!p))
7397                return -EAGAIN;
7398        if (*p == xdr_zero) {
7399                p = xdr_inline_decode(xdr, 4);
7400                if (unlikely(!p))
7401                        return -EAGAIN;
7402                if (*p == xdr_zero)
7403                        return -EAGAIN;
7404                entry->eof = 1;
7405                return -EBADCOOKIE;
7406        }
7407
7408        p = xdr_inline_decode(xdr, 12);
7409        if (unlikely(!p))
7410                return -EAGAIN;
7411        p = xdr_decode_hyper(p, &new_cookie);
7412        entry->len = be32_to_cpup(p);
7413
7414        p = xdr_inline_decode(xdr, entry->len);
7415        if (unlikely(!p))
7416                return -EAGAIN;
7417        entry->name = (const char *) p;
7418
7419        /*
7420         * In case the server doesn't return an inode number,
7421         * we fake one here.  (We don't use inode number 0,
7422         * since glibc seems to choke on it...)
7423         */
7424        entry->ino = 1;
7425        entry->fattr->valid = 0;
7426
7427        if (decode_attr_bitmap(xdr, bitmap) < 0)
7428                return -EAGAIN;
7429
7430        if (decode_attr_length(xdr, &len, &savep) < 0)
7431                return -EAGAIN;
7432
7433        if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7434                        NULL, entry->label, entry->server) < 0)
7435                return -EAGAIN;
7436        if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7437                entry->ino = entry->fattr->mounted_on_fileid;
7438        else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7439                entry->ino = entry->fattr->fileid;
7440
7441        entry->d_type = DT_UNKNOWN;
7442        if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7443                entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7444
7445        entry->prev_cookie = entry->cookie;
7446        entry->cookie = new_cookie;
7447
7448        return 0;
7449}
7450
7451/*
7452 * We need to translate between nfs status return values and
7453 * the local errno values which may not be the same.
7454 */
7455static struct {
7456        int stat;
7457        int errno;
7458} nfs_errtbl[] = {
7459        { NFS4_OK,              0               },
7460        { NFS4ERR_PERM,         -EPERM          },
7461        { NFS4ERR_NOENT,        -ENOENT         },
7462        { NFS4ERR_IO,           -errno_NFSERR_IO},
7463        { NFS4ERR_NXIO,         -ENXIO          },
7464        { NFS4ERR_ACCESS,       -EACCES         },
7465        { NFS4ERR_EXIST,        -EEXIST         },
7466        { NFS4ERR_XDEV,         -EXDEV          },
7467        { NFS4ERR_NOTDIR,       -ENOTDIR        },
7468        { NFS4ERR_ISDIR,        -EISDIR         },
7469        { NFS4ERR_INVAL,        -EINVAL         },
7470        { NFS4ERR_FBIG,         -EFBIG          },
7471        { NFS4ERR_NOSPC,        -ENOSPC         },
7472        { NFS4ERR_ROFS,         -EROFS          },
7473        { NFS4ERR_MLINK,        -EMLINK         },
7474        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7475        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7476        { NFS4ERR_DQUOT,        -EDQUOT         },
7477        { NFS4ERR_STALE,        -ESTALE         },
7478        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7479        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7480        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7481        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7482        { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7483        { NFS4ERR_BADTYPE,      -EBADTYPE       },
7484        { NFS4ERR_LOCKED,       -EAGAIN         },
7485        { NFS4ERR_SYMLINK,      -ELOOP          },
7486        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7487        { NFS4ERR_DEADLOCK,     -EDEADLK        },
7488        { NFS4ERR_NOXATTR,      -ENODATA        },
7489        { NFS4ERR_XATTR2BIG,    -E2BIG          },
7490        { -1,                   -EIO            }
7491};
7492
7493/*
7494 * Convert an NFS error code to a local one.
7495 * This one is used jointly by NFSv2 and NFSv3.
7496 */
7497static int
7498nfs4_stat_to_errno(int stat)
7499{
7500        int i;
7501        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7502                if (nfs_errtbl[i].stat == stat)
7503                        return nfs_errtbl[i].errno;
7504        }
7505        if (stat <= 10000 || stat > 10100) {
7506                /* The server is looney tunes. */
7507                return -EREMOTEIO;
7508        }
7509        /* If we cannot translate the error, the recovery routines should
7510         * handle it.
7511         * Note: remaining NFSv4 error codes have values > 10000, so should
7512         * not conflict with native Linux error codes.
7513         */
7514        return -stat;
7515}
7516
7517#ifdef CONFIG_NFS_V4_2
7518#include "nfs42xdr.c"
7519#endif /* CONFIG_NFS_V4_2 */
7520
7521#define PROC(proc, argtype, restype)                            \
7522[NFSPROC4_CLNT_##proc] = {                                      \
7523        .p_proc   = NFSPROC4_COMPOUND,                          \
7524        .p_encode = nfs4_xdr_##argtype,                         \
7525        .p_decode = nfs4_xdr_##restype,                         \
7526        .p_arglen = NFS4_##argtype##_sz,                        \
7527        .p_replen = NFS4_##restype##_sz,                        \
7528        .p_statidx = NFSPROC4_CLNT_##proc,                      \
7529        .p_name   = #proc,                                      \
7530}
7531
7532#define STUB(proc)              \
7533[NFSPROC4_CLNT_##proc] = {      \
7534        .p_name = #proc,        \
7535}
7536
7537#if defined(CONFIG_NFS_V4_1)
7538#define PROC41(proc, argtype, restype)                          \
7539        PROC(proc, argtype, restype)
7540#else
7541#define PROC41(proc, argtype, restype)                          \
7542        STUB(proc)
7543#endif
7544
7545#if defined(CONFIG_NFS_V4_2)
7546#define PROC42(proc, argtype, restype)                          \
7547        PROC(proc, argtype, restype)
7548#else
7549#define PROC42(proc, argtype, restype)                          \
7550        STUB(proc)
7551#endif
7552
7553const struct rpc_procinfo nfs4_procedures[] = {
7554        PROC(READ,              enc_read,               dec_read),
7555        PROC(WRITE,             enc_write,              dec_write),
7556        PROC(COMMIT,            enc_commit,             dec_commit),
7557        PROC(OPEN,              enc_open,               dec_open),
7558        PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7559        PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7560        PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7561        PROC(CLOSE,             enc_close,              dec_close),
7562        PROC(SETATTR,           enc_setattr,            dec_setattr),
7563        PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7564        PROC(RENEW,             enc_renew,              dec_renew),
7565        PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7566        PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7567        PROC(LOCK,              enc_lock,               dec_lock),
7568        PROC(LOCKT,             enc_lockt,              dec_lockt),
7569        PROC(LOCKU,             enc_locku,              dec_locku),
7570        PROC(ACCESS,            enc_access,             dec_access),
7571        PROC(GETATTR,           enc_getattr,            dec_getattr),
7572        PROC(LOOKUP,            enc_lookup,             dec_lookup),
7573        PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7574        PROC(REMOVE,            enc_remove,             dec_remove),
7575        PROC(RENAME,            enc_rename,             dec_rename),
7576        PROC(LINK,              enc_link,               dec_link),
7577        PROC(SYMLINK,           enc_symlink,            dec_symlink),
7578        PROC(CREATE,            enc_create,             dec_create),
7579        PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7580        PROC(STATFS,            enc_statfs,             dec_statfs),
7581        PROC(READLINK,          enc_readlink,           dec_readlink),
7582        PROC(READDIR,           enc_readdir,            dec_readdir),
7583        PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7584        PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7585        PROC(GETACL,            enc_getacl,             dec_getacl),
7586        PROC(SETACL,            enc_setacl,             dec_setacl),
7587        PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7588        PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7589        PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7590        PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7591        PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7592        PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7593        PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7594        PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7595        PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7596        PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7597        PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7598        PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7599        PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7600        PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7601        PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7602        PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7603        PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7604        STUB(GETDEVICELIST),
7605        PROC41(BIND_CONN_TO_SESSION,
7606                        enc_bind_conn_to_session, dec_bind_conn_to_session),
7607        PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7608        PROC42(SEEK,            enc_seek,               dec_seek),
7609        PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7610        PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7611        PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7612        PROC42(CLONE,           enc_clone,              dec_clone),
7613        PROC42(COPY,            enc_copy,               dec_copy),
7614        PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7615        PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7616        PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7617        PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7618        PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7619        PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7620        PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7621        PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7622        PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7623};
7624
7625static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7626const struct rpc_version nfs_version4 = {
7627        .number                 = 4,
7628        .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7629        .procs                  = nfs4_procedures,
7630        .counts                 = nfs_version4_counts,
7631};
7632
7633/*
7634 * Local variables:
7635 *  c-basic-offset: 8
7636 * End:
7637 */
7638