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 <[email protected]>
  10  *  Andy Adamson   <[email protected]>
  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 #include <linux/nfs_common.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "nfs4trace.h"
  59 #include "internal.h"
  60 #include "nfs4idmap.h"
  61 #include "nfs4session.h"
  62 #include "pnfs.h"
  63 #include "netns.h"
  64
  65 #define NFSDBG_FACILITY         NFSDBG_XDR
  66
  67 struct compound_hdr;
  68 static void encode_layoutget(struct xdr_stream *xdr,
  69                              const struct nfs4_layoutget_args *args,
  70                              struct compound_hdr *hdr);
  71 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  72                              struct nfs4_layoutget_res *res);
  73
  74 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  75 #ifdef DEBUG
  76 #define NFS4_MAXTAGLEN          20
  77 #else
  78 #define NFS4_MAXTAGLEN          0
  79 #endif
  80
  81 /* lock,open owner id:
  82  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  83  */
  84 #define pagepad_maxsz           (1)
  85 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  86 #define lock_owner_id_maxsz     (1 + 1 + 4)
  87 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  88 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  89 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  90 #define op_encode_hdr_maxsz     (1)
  91 #define op_decode_hdr_maxsz     (2)
  92 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  93 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  94 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  95 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  96 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  97                                 (NFS4_FHSIZE >> 2))
  98 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  99 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 100 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 101 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 102 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 103                                 ((3+NFS4_FHSIZE) >> 2))
 104 #define nfs4_fattr_bitmap_maxsz 4
 105 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 106 #define nfstime4_maxsz          (3)
 107 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 108 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 109 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 110 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 111 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 112 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 113 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 114 #else
 115 #define nfs4_label_maxsz        0
 116 #endif
 117 /* We support only one layout type per file system */
 118 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 119 /* This is based on getfattr, which uses the most attributes: */
 120 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 121                                 3*nfstime4_maxsz + \
 122                                 nfs4_owner_maxsz + \
 123                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 124                                  decode_mdsthreshold_maxsz))
 125 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 126                                 nfs4_fattr_value_maxsz)
 127 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 128 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 129                                  1 + 2 + 1 + \
 130                                 nfs4_owner_maxsz + \
 131                                 nfs4_group_maxsz + \
 132                                 nfs4_label_maxsz + \
 133                                 1 + nfstime4_maxsz + \
 134                                 1 + nfstime4_maxsz)
 135 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 136 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 137 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 138 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 139 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 140 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 141  * layout types will be returned.
 142  */
 143 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 144                                  nfs4_fattr_bitmap_maxsz + 1 + \
 145                                  1 /* lease time */ + \
 146                                  2 /* max filesize */ + \
 147                                  2 /* max read */ + \
 148                                  2 /* max write */ + \
 149                                  nfstime4_maxsz /* time delta */ + \
 150                                  5 /* fs layout types */ + \
 151                                  1 /* layout blksize */ + \
 152                                  1 /* clone blksize */ + \
 153                                  1 /* change attr type */ + \
 154                                  1 /* xattr support */)
 155 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 156 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 157 #define encode_setclientid_maxsz \
 158                                 (op_encode_hdr_maxsz + \
 159                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 160                                 /* client name */ \
 161                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 162                                 1 /* sc_prog */ + \
 163                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 164                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 165                                 1) /* sc_cb_ident */
 166 #define decode_setclientid_maxsz \
 167                                 (op_decode_hdr_maxsz + \
 168                                 2 /* clientid */ + \
 169                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 170                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 171                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 172 #define encode_setclientid_confirm_maxsz \
 173                                 (op_encode_hdr_maxsz + \
 174                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 175 #define decode_setclientid_confirm_maxsz \
 176                                 (op_decode_hdr_maxsz)
 177 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 178 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 179 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 180 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 181 #define encode_share_access_maxsz \
 182                                 (2)
 183 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 184 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 185 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 186 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 187                                 2 + encode_share_access_maxsz + 2 + \
 188                                 open_owner_id_maxsz + \
 189                                 encode_opentype_maxsz + \
 190                                 encode_claim_null_maxsz)
 191 #define decode_space_limit_maxsz        (3)
 192 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 193 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 194                                 decode_space_limit_maxsz + \
 195                                 decode_ace_maxsz)
 196 #define decode_change_info_maxsz        (5)
 197 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 198                                 decode_stateid_maxsz + \
 199                                 decode_change_info_maxsz + 1 + \
 200                                 nfs4_fattr_bitmap_maxsz + \
 201                                 decode_delegation_maxsz)
 202 #define encode_open_confirm_maxsz \
 203                                 (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 1)
 205 #define decode_open_confirm_maxsz \
 206                                 (op_decode_hdr_maxsz + \
 207                                  decode_stateid_maxsz)
 208 #define encode_open_downgrade_maxsz \
 209                                 (op_encode_hdr_maxsz + \
 210                                  encode_stateid_maxsz + 1 + \
 211                                  encode_share_access_maxsz)
 212 #define decode_open_downgrade_maxsz \
 213                                 (op_decode_hdr_maxsz + \
 214                                  decode_stateid_maxsz)
 215 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 216                                  1 + encode_stateid_maxsz)
 217 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 218                                  decode_stateid_maxsz)
 219 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 220                                  encode_stateid_maxsz + \
 221                                  encode_attrs_maxsz)
 222 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 223                                  nfs4_fattr_bitmap_maxsz)
 224 #define encode_delegattr_maxsz  (op_encode_hdr_maxsz + \
 225                                  encode_stateid_maxsz + \
 226                                 nfs4_fattr_bitmap_maxsz + \
 227                                 2*nfstime4_maxsz)
 228 #define decode_delegattr_maxsz  (decode_setattr_maxsz)
 229 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 230                                  encode_stateid_maxsz + 3)
 231 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + pagepad_maxsz)
 232 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 233                                  2 + encode_verifier_maxsz + 5 + \
 234                                 nfs4_label_maxsz)
 235 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 236                                  decode_verifier_maxsz + pagepad_maxsz)
 237 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 238 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
 239 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 240                                  encode_stateid_maxsz + 4)
 241 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 242                                  2 + decode_verifier_maxsz)
 243 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 244 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 245                                  decode_verifier_maxsz)
 246 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 247                                 nfs4_name_maxsz)
 248 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 249                                  decode_change_info_maxsz)
 250 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 251                                 2 * nfs4_name_maxsz)
 252 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 253                                  decode_change_info_maxsz + \
 254                                  decode_change_info_maxsz)
 255 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 256                                 nfs4_name_maxsz)
 257 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 258 #define encode_lockowner_maxsz  (7)
 259 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 260                                  7 + \
 261                                  1 + encode_stateid_maxsz + 1 + \
 262                                  encode_lockowner_maxsz)
 263 #define decode_lock_denied_maxsz \
 264                                 (8 + decode_lockowner_maxsz)
 265 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 266                                  decode_lock_denied_maxsz)
 267 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 268                                 encode_lockowner_maxsz)
 269 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 270                                  decode_lock_denied_maxsz)
 271 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 272                                  encode_stateid_maxsz + \
 273                                  4)
 274 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 275                                  decode_stateid_maxsz)
 276 #define encode_release_lockowner_maxsz \
 277                                 (op_encode_hdr_maxsz + \
 278                                  encode_lockowner_maxsz)
 279 #define decode_release_lockowner_maxsz \
 280                                 (op_decode_hdr_maxsz)
 281 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 282 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 283 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 284                                 1 + nfs4_name_maxsz + \
 285                                 1 + \
 286                                 nfs4_fattr_maxsz)
 287 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 288 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 289                                 1 + 2 + nfs4_name_maxsz + \
 290                                 encode_attrs_maxsz)
 291 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 292                                 decode_change_info_maxsz + \
 293                                 nfs4_fattr_bitmap_maxsz)
 294 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 295 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 296 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 297 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 298 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 299 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 300                                  nfs4_fattr_bitmap_maxsz + 1 + pagepad_maxsz)
 301 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 302                                  encode_stateid_maxsz + 3)
 303 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 304 #define encode_fs_locations_maxsz \
 305                                 (encode_getattr_maxsz)
 306 #define decode_fs_locations_maxsz \
 307                                 (pagepad_maxsz)
 308 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 309 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 310
 311 #if defined(CONFIG_NFS_V4_1)
 312 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 313 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 314                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 315
 316 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 317                                 encode_verifier_maxsz + \
 318                                 1 /* co_ownerid.len */ + \
 319                                 /* eia_clientowner */ \
 320                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                 1 /* flags */ + \
 322                                 1 /* spa_how */ + \
 323                                 /* max is SP4_MACH_CRED (for now) */ + \
 324                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 325                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                 1 /* implementation id array of size 1 */ + \
 327                                 1 /* nii_domain */ + \
 328                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 329                                 1 /* nii_name */ + \
 330                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 331                                 3 /* nii_date */)
 332 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 333                                 2 /* eir_clientid */ + \
 334                                 1 /* eir_sequenceid */ + \
 335                                 1 /* eir_flags */ + \
 336                                 1 /* spr_how */ + \
 337                                   /* max is SP4_MACH_CRED (for now) */ + \
 338                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 339                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 340                                 2 /* eir_server_owner.so_minor_id */ + \
 341                                 /* eir_server_owner.so_major_id<> */ \
 342                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 343                                 /* eir_server_scope<> */ \
 344                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 345                                 1 /* eir_server_impl_id array length */ + \
 346                                 1 /* nii_domain */ + \
 347                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 348                                 1 /* nii_name */ + \
 349                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 350                                 3 /* nii_date */)
 351 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 352 #define decode_channel_attrs_maxsz  (6 + \
 353                                      1 /* ca_rdma_ird.len */ + \
 354                                      1 /* ca_rdma_ird */)
 355 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 356                                      2 /* csa_clientid */ + \
 357                                      1 /* csa_sequence */ + \
 358                                      1 /* csa_flags */ + \
 359                                      encode_channel_attrs_maxsz + \
 360                                      encode_channel_attrs_maxsz + \
 361                                      1 /* csa_cb_program */ + \
 362                                      1 /* csa_sec_parms.len (1) */ + \
 363                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 364                                      1 /* stamp */ + \
 365                                      1 /* machinename.len */ + \
 366                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 367                                      1 /* uid */ + \
 368                                      1 /* gid */ + \
 369                                      1 /* gids.len (0) */)
 370 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 371                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 372                                      1 /* csr_sequence */ + \
 373                                      1 /* csr_flags */ + \
 374                                      decode_channel_attrs_maxsz + \
 375                                      decode_channel_attrs_maxsz)
 376 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 377                                      /* bctsa_sessid */ \
 378                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 379                                      1 /* bctsa_dir */ + \
 380                                      1 /* bctsa_use_conn_in_rdma_mode */)
 381 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 382                                      /* bctsr_sessid */ \
 383                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 384                                      1 /* bctsr_dir */ + \
 385                                      1 /* bctsr_use_conn_in_rdma_mode */)
 386 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 387 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 388 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 389 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 390 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 391                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 392 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 393                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 394 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 395 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 396 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 397                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 398                                 1 /* layout type */ + \
 399                                 1 /* maxcount */ + \
 400                                 1 /* bitmap size */ + \
 401                                 1 /* notification bitmap length */ + \
 402                                 1 /* notification bitmap, word 0 */)
 403 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 404                                 1 /* layout type */ + \
 405                                 1 /* opaque devaddr4 length */ + \
 406                                   /* devaddr4 payload is read into page */ \
 407                                 1 /* notification bitmap length */ + \
 408                                 1 /* notification bitmap, word 0 */ + \
 409                                 pagepad_maxsz /* possible XDR padding */)
 410 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 411                                 encode_stateid_maxsz)
 412 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 413                                 decode_stateid_maxsz + \
 414                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + \
 415                                 pagepad_maxsz)
 416 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 417                                 2 /* offset */ + \
 418                                 2 /* length */ + \
 419                                 1 /* reclaim */ + \
 420                                 encode_stateid_maxsz + \
 421                                 1 /* new offset (true) */ + \
 422                                 2 /* last byte written */ + \
 423                                 1 /* nt_timechanged (false) */ + \
 424                                 1 /* layoutupdate4 layout type */ + \
 425                                 1 /* layoutupdate4 opaqueue len */)
 426                                   /* the actual content of layoutupdate4 should
 427                                      be allocated by drivers and spliced in
 428                                      using xdr_write_pages */
 429 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 430 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 431                                 encode_stateid_maxsz + \
 432                                 1 + \
 433                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 434 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 435                                 1 + decode_stateid_maxsz)
 436 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 437 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 438 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 439                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 440 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 441 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 442                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 443 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 444 #else /* CONFIG_NFS_V4_1 */
 445 #define encode_sequence_maxsz   0
 446 #define decode_sequence_maxsz   0
 447 #define encode_layoutreturn_maxsz 0
 448 #define decode_layoutreturn_maxsz 0
 449 #define encode_layoutget_maxsz  0
 450 #define decode_layoutget_maxsz  0
 451 #endif /* CONFIG_NFS_V4_1 */
 452
 453 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 454 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 455 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_read_maxsz)
 459 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 460                                 decode_sequence_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_read_maxsz)
 463 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_readlink_maxsz)
 467 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 468                                 decode_sequence_maxsz + \
 469                                 decode_putfh_maxsz + \
 470                                 decode_readlink_maxsz)
 471 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 472                                 encode_sequence_maxsz + \
 473                                 encode_putfh_maxsz + \
 474                                 encode_readdir_maxsz)
 475 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 476                                 decode_sequence_maxsz + \
 477                                 decode_putfh_maxsz + \
 478                                 decode_readdir_maxsz)
 479 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 480                                 encode_sequence_maxsz + \
 481                                 encode_putfh_maxsz + \
 482                                 encode_write_maxsz + \
 483                                 encode_getattr_maxsz)
 484 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 485                                 decode_sequence_maxsz + \
 486                                 decode_putfh_maxsz + \
 487                                 decode_write_maxsz + \
 488                                 decode_getattr_maxsz)
 489 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 490                                 encode_sequence_maxsz + \
 491                                 encode_putfh_maxsz + \
 492                                 encode_commit_maxsz)
 493 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 494                                 decode_sequence_maxsz + \
 495                                 decode_putfh_maxsz + \
 496                                 decode_commit_maxsz)
 497 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 498                                 encode_sequence_maxsz + \
 499                                 encode_putfh_maxsz + \
 500                                 encode_open_maxsz + \
 501                                 encode_access_maxsz + \
 502                                 encode_getfh_maxsz + \
 503                                 encode_getattr_maxsz + \
 504                                 encode_layoutget_maxsz)
 505 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 506                                 decode_sequence_maxsz + \
 507                                 decode_putfh_maxsz + \
 508                                 decode_open_maxsz + \
 509                                 decode_access_maxsz + \
 510                                 decode_getfh_maxsz + \
 511                                 decode_getattr_maxsz + \
 512                                 decode_layoutget_maxsz)
 513 #define NFS4_enc_open_confirm_sz \
 514                                 (compound_encode_hdr_maxsz + \
 515                                  encode_putfh_maxsz + \
 516                                  encode_open_confirm_maxsz)
 517 #define NFS4_dec_open_confirm_sz \
 518                                 (compound_decode_hdr_maxsz + \
 519                                  decode_putfh_maxsz + \
 520                                  decode_open_confirm_maxsz)
 521 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 522                                         encode_sequence_maxsz + \
 523                                         encode_putfh_maxsz + \
 524                                         encode_open_maxsz + \
 525                                         encode_access_maxsz + \
 526                                         encode_getattr_maxsz + \
 527                                         encode_layoutget_maxsz)
 528 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 529                                         decode_sequence_maxsz + \
 530                                         decode_putfh_maxsz + \
 531                                         decode_open_maxsz + \
 532                                         decode_access_maxsz + \
 533                                         decode_getattr_maxsz + \
 534                                         decode_layoutget_maxsz)
 535 #define NFS4_enc_open_downgrade_sz \
 536                                 (compound_encode_hdr_maxsz + \
 537                                  encode_sequence_maxsz + \
 538                                  encode_putfh_maxsz + \
 539                                  encode_layoutreturn_maxsz + \
 540                                  encode_open_downgrade_maxsz)
 541 #define NFS4_dec_open_downgrade_sz \
 542                                 (compound_decode_hdr_maxsz + \
 543                                  decode_sequence_maxsz + \
 544                                  decode_putfh_maxsz + \
 545                                  decode_layoutreturn_maxsz + \
 546                                  decode_open_downgrade_maxsz)
 547 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 548                                  encode_sequence_maxsz + \
 549                                  encode_putfh_maxsz + \
 550                                  encode_layoutreturn_maxsz + \
 551                                  encode_close_maxsz + \
 552                                  encode_getattr_maxsz)
 553 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 554                                  decode_sequence_maxsz + \
 555                                  decode_putfh_maxsz + \
 556                                  decode_layoutreturn_maxsz + \
 557                                  decode_close_maxsz + \
 558                                  decode_getattr_maxsz)
 559 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 560                                  encode_sequence_maxsz + \
 561                                  encode_putfh_maxsz + \
 562                                  encode_setattr_maxsz + \
 563                                  encode_getattr_maxsz)
 564 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 565                                  decode_sequence_maxsz + \
 566                                  decode_putfh_maxsz + \
 567                                  decode_setattr_maxsz + \
 568                                  decode_getattr_maxsz)
 569 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 570                                 encode_sequence_maxsz + \
 571                                 encode_putfh_maxsz + \
 572                                 encode_fsinfo_maxsz)
 573 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 574                                 decode_sequence_maxsz + \
 575                                 decode_putfh_maxsz + \
 576                                 decode_fsinfo_maxsz)
 577 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 578                                 encode_renew_maxsz)
 579 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 580                                 decode_renew_maxsz)
 581 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 582                                 encode_setclientid_maxsz)
 583 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 584                                 decode_setclientid_maxsz)
 585 #define NFS4_enc_setclientid_confirm_sz \
 586                                 (compound_encode_hdr_maxsz + \
 587                                 encode_setclientid_confirm_maxsz)
 588 #define NFS4_dec_setclientid_confirm_sz \
 589                                 (compound_decode_hdr_maxsz + \
 590                                 decode_setclientid_confirm_maxsz)
 591 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_lock_maxsz)
 595 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_lock_maxsz)
 599 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_lockt_maxsz)
 603 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 604                                  decode_sequence_maxsz + \
 605                                  decode_putfh_maxsz + \
 606                                  decode_lockt_maxsz)
 607 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_locku_maxsz)
 611 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_locku_maxsz)
 615 #define NFS4_enc_release_lockowner_sz \
 616                                 (compound_encode_hdr_maxsz + \
 617                                  encode_lockowner_maxsz)
 618 #define NFS4_dec_release_lockowner_sz \
 619                                 (compound_decode_hdr_maxsz + \
 620                                  decode_lockowner_maxsz)
 621 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_access_maxsz + \
 625                                 encode_getattr_maxsz)
 626 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 627                                 decode_sequence_maxsz + \
 628                                 decode_putfh_maxsz + \
 629                                 decode_access_maxsz + \
 630                                 decode_getattr_maxsz)
 631 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_getattr_maxsz + \
 635                                 encode_renew_maxsz)
 636 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_getattr_maxsz + \
 640                                 decode_renew_maxsz)
 641 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_lookup_maxsz + \
 645                                 encode_getattr_maxsz + \
 646                                 encode_getfh_maxsz)
 647 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_lookup_maxsz + \
 651                                 decode_getattr_maxsz + \
 652                                 decode_getfh_maxsz)
 653 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 654                                 encode_sequence_maxsz + \
 655                                 encode_putfh_maxsz + \
 656                                 encode_lookupp_maxsz + \
 657                                 encode_getattr_maxsz + \
 658                                 encode_getfh_maxsz)
 659 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 660                                 decode_sequence_maxsz + \
 661                                 decode_putfh_maxsz + \
 662                                 decode_lookupp_maxsz + \
 663                                 decode_getattr_maxsz + \
 664                                 decode_getfh_maxsz)
 665 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 666                                 encode_sequence_maxsz + \
 667                                 encode_putrootfh_maxsz + \
 668                                 encode_getattr_maxsz + \
 669                                 encode_getfh_maxsz)
 670 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 671                                 decode_sequence_maxsz + \
 672                                 decode_putrootfh_maxsz + \
 673                                 decode_getattr_maxsz + \
 674                                 decode_getfh_maxsz)
 675 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 676                                 encode_sequence_maxsz + \
 677                                 encode_putfh_maxsz + \
 678                                 encode_remove_maxsz)
 679 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 680                                 decode_sequence_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_remove_maxsz)
 683 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_savefh_maxsz + \
 687                                 encode_putfh_maxsz + \
 688                                 encode_rename_maxsz)
 689 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_savefh_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_rename_maxsz)
 695 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_savefh_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_link_maxsz + \
 701                                 encode_restorefh_maxsz + \
 702                                 encode_getattr_maxsz)
 703 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_savefh_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_link_maxsz + \
 709                                 decode_restorefh_maxsz + \
 710                                 decode_getattr_maxsz)
 711 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 712                                 encode_sequence_maxsz + \
 713                                 encode_putfh_maxsz + \
 714                                 encode_symlink_maxsz + \
 715                                 encode_getattr_maxsz + \
 716                                 encode_getfh_maxsz)
 717 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 718                                 decode_sequence_maxsz + \
 719                                 decode_putfh_maxsz + \
 720                                 decode_symlink_maxsz + \
 721                                 decode_getattr_maxsz + \
 722                                 decode_getfh_maxsz)
 723 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_create_maxsz + \
 727                                 encode_getfh_maxsz + \
 728                                 encode_getattr_maxsz)
 729 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_create_maxsz + \
 733                                 decode_getfh_maxsz + \
 734                                 decode_getattr_maxsz)
 735 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 736                                 encode_sequence_maxsz + \
 737                                 encode_putfh_maxsz + \
 738                                 encode_getattr_maxsz)
 739 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 740                                 decode_sequence_maxsz + \
 741                                 decode_putfh_maxsz + \
 742                                 decode_getattr_maxsz)
 743 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 744                                 encode_sequence_maxsz + \
 745                                 encode_putfh_maxsz + \
 746                                 encode_statfs_maxsz)
 747 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 748                                 decode_sequence_maxsz + \
 749                                 decode_putfh_maxsz + \
 750                                 decode_statfs_maxsz)
 751 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 752                                 encode_sequence_maxsz + \
 753                                 encode_putfh_maxsz + \
 754                                 encode_getattr_maxsz)
 755 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 756                                 decode_sequence_maxsz + \
 757                                 decode_putfh_maxsz + \
 758                                 decode_getattr_maxsz)
 759 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 760                                 encode_sequence_maxsz + \
 761                                 encode_putfh_maxsz + \
 762                                 encode_layoutreturn_maxsz + \
 763                                 encode_delegattr_maxsz + \
 764                                 encode_delegreturn_maxsz + \
 765                                 encode_getattr_maxsz)
 766 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 767                                 decode_sequence_maxsz + \
 768                                 decode_putfh_maxsz + \
 769                                 decode_layoutreturn_maxsz + \
 770                                 decode_delegattr_maxsz + \
 771                                 decode_delegreturn_maxsz + \
 772                                 decode_getattr_maxsz)
 773 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 774                                 encode_sequence_maxsz + \
 775                                 encode_putfh_maxsz + \
 776                                 encode_getacl_maxsz)
 777 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 778                                 decode_sequence_maxsz + \
 779                                 decode_putfh_maxsz + \
 780                                 decode_getacl_maxsz)
 781 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 782                                 encode_sequence_maxsz + \
 783                                 encode_putfh_maxsz + \
 784                                 encode_setacl_maxsz)
 785 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 786                                 decode_sequence_maxsz + \
 787                                 decode_putfh_maxsz + \
 788                                 decode_setacl_maxsz)
 789 #define NFS4_enc_fs_locations_sz \
 790                                 (compound_encode_hdr_maxsz + \
 791                                  encode_sequence_maxsz + \
 792                                  encode_putfh_maxsz + \
 793                                  encode_lookup_maxsz + \
 794                                  encode_fs_locations_maxsz + \
 795                                  encode_renew_maxsz)
 796 #define NFS4_dec_fs_locations_sz \
 797                                 (compound_decode_hdr_maxsz + \
 798                                  decode_sequence_maxsz + \
 799                                  decode_putfh_maxsz + \
 800                                  decode_lookup_maxsz + \
 801                                  decode_fs_locations_maxsz + \
 802                                  decode_renew_maxsz)
 803 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 804                                 encode_sequence_maxsz + \
 805                                 encode_putfh_maxsz + \
 806                                 encode_secinfo_maxsz)
 807 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 808                                 decode_sequence_maxsz + \
 809                                 decode_putfh_maxsz + \
 810                                 decode_secinfo_maxsz)
 811 #define NFS4_enc_fsid_present_sz \
 812                                 (compound_encode_hdr_maxsz + \
 813                                  encode_sequence_maxsz + \
 814                                  encode_putfh_maxsz + \
 815                                  encode_getfh_maxsz + \
 816                                  encode_renew_maxsz)
 817 #define NFS4_dec_fsid_present_sz \
 818                                 (compound_decode_hdr_maxsz + \
 819                                  decode_sequence_maxsz + \
 820                                  decode_putfh_maxsz + \
 821                                  decode_getfh_maxsz + \
 822                                  decode_renew_maxsz)
 823 #if defined(CONFIG_NFS_V4_1)
 824 #define NFS4_enc_bind_conn_to_session_sz \
 825                                 (compound_encode_hdr_maxsz + \
 826                                  encode_bind_conn_to_session_maxsz)
 827 #define NFS4_dec_bind_conn_to_session_sz \
 828                                 (compound_decode_hdr_maxsz + \
 829                                  decode_bind_conn_to_session_maxsz)
 830 #define NFS4_enc_exchange_id_sz \
 831                                 (compound_encode_hdr_maxsz + \
 832                                  encode_exchange_id_maxsz)
 833 #define NFS4_dec_exchange_id_sz \
 834                                 (compound_decode_hdr_maxsz + \
 835                                  decode_exchange_id_maxsz)
 836 #define NFS4_enc_create_session_sz \
 837                                 (compound_encode_hdr_maxsz + \
 838                                  encode_create_session_maxsz)
 839 #define NFS4_dec_create_session_sz \
 840                                 (compound_decode_hdr_maxsz + \
 841                                  decode_create_session_maxsz)
 842 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 843                                          encode_destroy_session_maxsz)
 844 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 845                                          decode_destroy_session_maxsz)
 846 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 847                                          encode_destroy_clientid_maxsz)
 848 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 849                                          decode_destroy_clientid_maxsz)
 850 #define NFS4_enc_sequence_sz \
 851                                 (compound_decode_hdr_maxsz + \
 852                                  encode_sequence_maxsz)
 853 #define NFS4_dec_sequence_sz \
 854                                 (compound_decode_hdr_maxsz + \
 855                                  decode_sequence_maxsz)
 856 #endif
 857 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 858                                          encode_sequence_maxsz + \
 859                                          encode_putrootfh_maxsz + \
 860                                          encode_fsinfo_maxsz)
 861 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 862                                          decode_sequence_maxsz + \
 863                                          decode_putrootfh_maxsz + \
 864                                          decode_fsinfo_maxsz)
 865 #if defined(CONFIG_NFS_V4_1)
 866 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 867                                          encode_sequence_maxsz + \
 868                                          encode_reclaim_complete_maxsz)
 869 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 870                                          decode_sequence_maxsz + \
 871                                          decode_reclaim_complete_maxsz)
 872 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 873                                 encode_sequence_maxsz +\
 874                                 encode_getdeviceinfo_maxsz)
 875 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 876                                 decode_sequence_maxsz + \
 877                                 decode_getdeviceinfo_maxsz)
 878 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 879                                 encode_sequence_maxsz + \
 880                                 encode_putfh_maxsz +        \
 881                                 encode_layoutget_maxsz)
 882 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 883                                 decode_sequence_maxsz + \
 884                                 decode_putfh_maxsz +        \
 885                                 decode_layoutget_maxsz)
 886 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 887                                 encode_sequence_maxsz +\
 888                                 encode_putfh_maxsz + \
 889                                 encode_layoutcommit_maxsz + \
 890                                 encode_getattr_maxsz)
 891 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 892                                 decode_sequence_maxsz + \
 893                                 decode_putfh_maxsz + \
 894                                 decode_layoutcommit_maxsz + \
 895                                 decode_getattr_maxsz)
 896 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 897                                 encode_sequence_maxsz + \
 898                                 encode_putfh_maxsz + \
 899                                 encode_layoutreturn_maxsz)
 900 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 901                                 decode_sequence_maxsz + \
 902                                 decode_putfh_maxsz + \
 903                                 decode_layoutreturn_maxsz)
 904 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 905                                         encode_sequence_maxsz + \
 906                                         encode_putrootfh_maxsz +\
 907                                         encode_secinfo_no_name_maxsz)
 908 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 909                                         decode_sequence_maxsz + \
 910                                         decode_putrootfh_maxsz + \
 911                                         decode_secinfo_no_name_maxsz)
 912 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 913                                          encode_sequence_maxsz + \
 914                                          encode_test_stateid_maxsz)
 915 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 916                                          decode_sequence_maxsz + \
 917                                          decode_test_stateid_maxsz)
 918 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 919                                          encode_sequence_maxsz + \
 920                                          encode_free_stateid_maxsz)
 921 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 922                                          decode_sequence_maxsz + \
 923                                          decode_free_stateid_maxsz)
 924
 925 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 926                                       compound_encode_hdr_maxsz +
 927                                       encode_sequence_maxsz +
 928                                       encode_putfh_maxsz +
 929                                       encode_getattr_maxsz) *
 930                                      XDR_UNIT);
 931
 932 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 933                                      compound_decode_hdr_maxsz +
 934                                      decode_sequence_maxsz +
 935                                      decode_putfh_maxsz) *
 936                                     XDR_UNIT);
 937
 938 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 939                                            compound_decode_hdr_maxsz +
 940                                            decode_sequence_maxsz) *
 941                                           XDR_UNIT);
 942 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 943 #endif /* CONFIG_NFS_V4_1 */
 944
 945 static const umode_t nfs_type2fmt[] = {
 946         [NF4BAD] = 0,
 947         [NF4REG] = S_IFREG,
 948         [NF4DIR] = S_IFDIR,
 949         [NF4BLK] = S_IFBLK,
 950         [NF4CHR] = S_IFCHR,
 951         [NF4LNK] = S_IFLNK,
 952         [NF4SOCK] = S_IFSOCK,
 953         [NF4FIFO] = S_IFIFO,
 954         [NF4ATTRDIR] = 0,
 955         [NF4NAMEDATTR] = 0,
 956 };
 957
 958 struct compound_hdr {
 959         int32_t         status;
 960         uint32_t        nops;
 961         __be32 *        nops_p;
 962         uint32_t        taglen;
 963         char *          tag;
 964         uint32_t        replen;         /* expected reply words */
 965         u32             minorversion;
 966 };
 967
 968 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 969 {
 970         __be32 *p = xdr_reserve_space(xdr, nbytes);
 971         BUG_ON(!p);
 972         return p;
 973 }
 974
 975 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 976 {
 977         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 978 }
 979
 980 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 981 {
 982         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 983 }
 984
 985 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 986 {
 987         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 988 }
 989
 990 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 991                 const __u32 *bitmap, size_t len)
 992 {
 993         ssize_t ret;
 994
 995         /* Trim empty words */
 996         while (len > 0 && bitmap[len-1] == 0)
 997                 len--;
 998         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 999         if (WARN_ON_ONCE(ret < 0))
1000                 return ret;
1001         return len;
1002 }
1003
1004 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
1005                 __u32 *res, size_t len)
1006 {
1007         size_t i;
1008         __u32 tmp;
1009
1010         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1011                 len--;
1012         for (i = len; i-- > 0;) {
1013                 tmp = bitmap[i] & mask[i];
1014                 res[i] = tmp;
1015         }
1016         return len;
1017 }
1018
1019 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1020                 const struct nfs_seqid *seqid)
1021 {
1022         if (seqid != NULL)
1023                 encode_uint32(xdr, seqid->sequence->counter);
1024         else
1025                 encode_uint32(xdr, 0);
1026 }
1027
1028 static void encode_compound_hdr(struct xdr_stream *xdr,
1029                                 struct rpc_rqst *req,
1030                                 struct compound_hdr *hdr)
1031 {
1032         __be32 *p;
1033
1034         /* initialize running count of expected bytes in reply.
1035          * NOTE: the replied tag SHOULD be the same is the one sent,
1036          * but this is not required as a MUST for the server to do so. */
1037         hdr->replen = 3 + hdr->taglen;
1038
1039         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1040         encode_string(xdr, hdr->taglen, hdr->tag);
1041         p = reserve_space(xdr, 8);
1042         *p++ = cpu_to_be32(hdr->minorversion);
1043         hdr->nops_p = p;
1044         *p = cpu_to_be32(hdr->nops);
1045 }
1046
1047 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1048                 uint32_t replen,
1049                 struct compound_hdr *hdr)
1050 {
1051         encode_uint32(xdr, op);
1052         hdr->nops++;
1053         hdr->replen += replen;
1054 }
1055
1056 static void encode_nops(struct compound_hdr *hdr)
1057 {
1058         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1059         *hdr->nops_p = htonl(hdr->nops);
1060 }
1061
1062 static void encode_nfs4_stateid(struct xdr_stream *xdr,
1063                                 const nfs4_stateid *stateid)
1064 {
1065         encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
1066 }
1067
1068 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1069 {
1070         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1071 }
1072
1073 static __be32 *
1074 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1075 {
1076         p = xdr_encode_hyper(p, t->tv_sec);
1077         *p++ = cpu_to_be32(t->tv_nsec);
1078         return p;
1079 }
1080
1081 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1082                                 const struct nfs4_label *label,
1083                                 const umode_t *umask,
1084                                 const struct nfs_server *server,
1085                                 const uint32_t attrmask[])
1086 {
1087         char owner_name[IDMAP_NAMESZ];
1088         char owner_group[IDMAP_NAMESZ];
1089         int owner_namelen = 0;
1090         int owner_grouplen = 0;
1091         __be32 *p;
1092         uint32_t len = 0;
1093         uint32_t bmval[3] = { 0 };
1094
1095         /*
1096          * We reserve enough space to write the entire attribute buffer at once.
1097          */
1098         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1099                 bmval[0] |= FATTR4_WORD0_SIZE;
1100                 len += 8;
1101         }
1102         if (iap->ia_valid & ATTR_MODE) {
1103                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1104                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1105                         len += 8;
1106                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1107                         bmval[1] |= FATTR4_WORD1_MODE;
1108                         len += 4;
1109                 }
1110         }
1111         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1112                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1113                 if (owner_namelen < 0) {
1114                         dprintk("nfs: couldn't resolve uid %d to string\n",
1115                                         from_kuid(&init_user_ns, iap->ia_uid));
1116                         /* XXX */
1117                         strcpy(owner_name, "nobody");
1118                         owner_namelen = sizeof("nobody") - 1;
1119                         /* goto out; */
1120                 }
1121                 bmval[1] |= FATTR4_WORD1_OWNER;
1122                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1123         }
1124         if ((iap->ia_valid & ATTR_GID) &&
1125            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1126                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1127                 if (owner_grouplen < 0) {
1128                         dprintk("nfs: couldn't resolve gid %d to string\n",
1129                                         from_kgid(&init_user_ns, iap->ia_gid));
1130                         strcpy(owner_group, "nobody");
1131                         owner_grouplen = sizeof("nobody") - 1;
1132                         /* goto out; */
1133                 }
1134                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1135                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1136         }
1137         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1138                 if (iap->ia_valid & ATTR_ATIME_SET) {
1139                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1140                         len += 4 + (nfstime4_maxsz << 2);
1141                 } else if (iap->ia_valid & ATTR_ATIME) {
1142                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1143                         len += 4;
1144                 }
1145         }
1146         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1147                 if (iap->ia_valid & ATTR_MTIME_SET) {
1148                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1149                         len += 4 + (nfstime4_maxsz << 2);
1150                 } else if (iap->ia_valid & ATTR_MTIME) {
1151                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1152                         len += 4;
1153                 }
1154         }
1155
1156         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1157                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1158                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1159         }
1160
1161         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1162         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1163
1164         if (bmval[0] & FATTR4_WORD0_SIZE)
1165                 p = xdr_encode_hyper(p, iap->ia_size);
1166         if (bmval[1] & FATTR4_WORD1_MODE)
1167                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1168         if (bmval[1] & FATTR4_WORD1_OWNER)
1169                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1170         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1171                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1172         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1173                 if (iap->ia_valid & ATTR_ATIME_SET) {
1174                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1175                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1176                 } else
1177                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1178         }
1179         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1180                 if (iap->ia_valid & ATTR_MTIME_SET) {
1181                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1182                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1183                 } else
1184                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1185         }
1186         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1187                 *p++ = cpu_to_be32(label->lfs);
1188                 *p++ = cpu_to_be32(label->pi);
1189                 *p++ = cpu_to_be32(label->len);
1190                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1191         }
1192         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1193                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1194                 *p++ = cpu_to_be32(*umask);
1195         }
1196
1197 /* out: */
1198 }
1199
1200 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1201 {
1202         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1203         encode_uint32(xdr, access);
1204 }
1205
1206 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1207 {
1208         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1209         encode_nfs4_seqid(xdr, arg->seqid);
1210         encode_nfs4_stateid(xdr, &arg->stateid);
1211 }
1212
1213 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1218         p = reserve_space(xdr, 12);
1219         p = xdr_encode_hyper(p, args->offset);
1220         *p = cpu_to_be32(args->count);
1221 }
1222
1223 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1224 {
1225         __be32 *p;
1226
1227         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1228         encode_uint32(xdr, create->ftype);
1229
1230         switch (create->ftype) {
1231         case NF4LNK:
1232                 p = reserve_space(xdr, 4);
1233                 *p = cpu_to_be32(create->u.symlink.len);
1234                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1235                                 create->u.symlink.len);
1236                 xdr->buf->flags |= XDRBUF_WRITE;
1237                 break;
1238
1239         case NF4BLK: case NF4CHR:
1240                 p = reserve_space(xdr, 8);
1241                 *p++ = cpu_to_be32(create->u.device.specdata1);
1242                 *p = cpu_to_be32(create->u.device.specdata2);
1243                 break;
1244
1245         default:
1246                 break;
1247         }
1248
1249         encode_string(xdr, create->name->len, create->name->name);
1250         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1251                         create->server, create->server->attr_bitmask);
1252 }
1253
1254 static void encode_getattr(struct xdr_stream *xdr,
1255                 const __u32 *bitmap, const __u32 *mask, size_t len,
1256                 struct compound_hdr *hdr)
1257 {
1258         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1259
1260         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1261         if (mask) {
1262                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1263                         len = ARRAY_SIZE(masked_bitmap);
1264                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1265                 bitmap = masked_bitmap;
1266         }
1267         xdr_encode_bitmap4(xdr, bitmap, len);
1268 }
1269
1270 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1271 {
1272         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1273                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1274 }
1275
1276 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1277                                  const u32 *open_bitmap,
1278                                  struct compound_hdr *hdr)
1279 {
1280         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1281 }
1282
1283 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1284 {
1285         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1286                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1287 }
1288
1289 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1290 {
1291         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1292                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1293 }
1294
1295 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1296 {
1297         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1298 }
1299
1300 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1301 {
1302         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1303         encode_string(xdr, name->len, name->name);
1304 }
1305
1306 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1307 {
1308         if (lock_is_read(fl))
1309                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1310         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1311 }
1312
1313 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1314 {
1315         if (fl->fl_end == OFFSET_MAX)
1316                 return ~(uint64_t)0;
1317         return fl->fl_end - fl->fl_start + 1;
1318 }
1319
1320 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1321 {
1322         __be32 *p;
1323
1324         p = reserve_space(xdr, 32);
1325         p = xdr_encode_hyper(p, lowner->clientid);
1326         *p++ = cpu_to_be32(20);
1327         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1328         *p++ = cpu_to_be32(lowner->s_dev);
1329         xdr_encode_hyper(p, lowner->id);
1330 }
1331
1332 /*
1333  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1334  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1335  */
1336 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1337 {
1338         __be32 *p;
1339
1340         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1341         p = reserve_space(xdr, 28);
1342         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1343         *p++ = cpu_to_be32(args->reclaim);
1344         p = xdr_encode_hyper(p, args->fl->fl_start);
1345         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1346         *p = cpu_to_be32(args->new_lock_owner);
1347         if (args->new_lock_owner){
1348                 encode_nfs4_seqid(xdr, args->open_seqid);
1349                 encode_nfs4_stateid(xdr, &args->open_stateid);
1350                 encode_nfs4_seqid(xdr, args->lock_seqid);
1351                 encode_lockowner(xdr, &args->lock_owner);
1352         }
1353         else {
1354                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1355                 encode_nfs4_seqid(xdr, args->lock_seqid);
1356         }
1357 }
1358
1359 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1360 {
1361         __be32 *p;
1362
1363         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1364         p = reserve_space(xdr, 20);
1365         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1366         p = xdr_encode_hyper(p, args->fl->fl_start);
1367         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1368         encode_lockowner(xdr, &args->lock_owner);
1369 }
1370
1371 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1372 {
1373         __be32 *p;
1374
1375         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1376         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1377         encode_nfs4_seqid(xdr, args->seqid);
1378         encode_nfs4_stateid(xdr, &args->stateid);
1379         p = reserve_space(xdr, 16);
1380         p = xdr_encode_hyper(p, args->fl->fl_start);
1381         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1382 }
1383
1384 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1385 {
1386         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1387         encode_lockowner(xdr, lowner);
1388 }
1389
1390 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1391 {
1392         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1393         encode_string(xdr, name->len, name->name);
1394 }
1395
1396 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397 {
1398         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1399 }
1400
1401 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1402 {
1403         __be32 *p;
1404
1405         p = reserve_space(xdr, 8);
1406         *p++ = cpu_to_be32(share_access);
1407         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1408 }
1409
1410 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1411 {
1412         __be32 *p;
1413  /*
1414  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1415  * owner 4 = 32
1416  */
1417         encode_nfs4_seqid(xdr, arg->seqid);
1418         encode_share_access(xdr, arg->share_access);
1419         p = reserve_space(xdr, 40);
1420         p = xdr_encode_hyper(p, arg->clientid);
1421         *p++ = cpu_to_be32(28);
1422         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1423         *p++ = cpu_to_be32(arg->server->s_dev);
1424         p = xdr_encode_hyper(p, arg->id.uniquifier);
1425         xdr_encode_hyper(p, arg->id.create_time);
1426 }
1427
1428 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         switch(arg->createmode) {
1434         case NFS4_CREATE_UNCHECKED:
1435                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1436                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1437                                 arg->server, arg->server->attr_bitmask);
1438                 break;
1439         case NFS4_CREATE_GUARDED:
1440                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1441                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1442                                 arg->server, arg->server->attr_bitmask);
1443                 break;
1444         case NFS4_CREATE_EXCLUSIVE:
1445                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1446                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1447                 break;
1448         case NFS4_CREATE_EXCLUSIVE4_1:
1449                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1450                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1451                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1452                                 arg->server, arg->server->exclcreat_bitmask);
1453         }
1454 }
1455
1456 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1457 {
1458         __be32 *p;
1459
1460         p = reserve_space(xdr, 4);
1461         switch (arg->open_flags & O_CREAT) {
1462         case 0:
1463                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1464                 break;
1465         default:
1466                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1467                 encode_createmode(xdr, arg);
1468         }
1469 }
1470
1471 static inline void encode_delegation_type(struct xdr_stream *xdr, u32 delegation_type)
1472 {
1473         __be32 *p;
1474
1475         p = reserve_space(xdr, 4);
1476         switch (delegation_type) {
1477         case NFS4_OPEN_DELEGATE_NONE:
1478         case NFS4_OPEN_DELEGATE_READ:
1479         case NFS4_OPEN_DELEGATE_WRITE:
1480         case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
1481         case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
1482                 *p = cpu_to_be32(delegation_type);
1483                 break;
1484         default:
1485                 BUG();
1486         }
1487 }
1488
1489 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1495         encode_string(xdr, name->len, name->name);
1496 }
1497
1498 static inline void encode_claim_previous(struct xdr_stream *xdr, u32 type)
1499 {
1500         __be32 *p;
1501
1502         p = reserve_space(xdr, 4);
1503         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1504         encode_delegation_type(xdr, type);
1505 }
1506
1507 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1513         encode_nfs4_stateid(xdr, stateid);
1514         encode_string(xdr, name->len, name->name);
1515 }
1516
1517 static inline void encode_claim_fh(struct xdr_stream *xdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4);
1522         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1523 }
1524
1525 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1526 {
1527         __be32 *p;
1528
1529         p = reserve_space(xdr, 4);
1530         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1531         encode_nfs4_stateid(xdr, stateid);
1532 }
1533
1534 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1535 {
1536         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1537         encode_openhdr(xdr, arg);
1538         encode_opentype(xdr, arg);
1539         switch (arg->claim) {
1540         case NFS4_OPEN_CLAIM_NULL:
1541                 encode_claim_null(xdr, arg->name);
1542                 break;
1543         case NFS4_OPEN_CLAIM_PREVIOUS:
1544                 encode_claim_previous(xdr, arg->u.delegation_type);
1545                 break;
1546         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1547                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1548                 break;
1549         case NFS4_OPEN_CLAIM_FH:
1550                 encode_claim_fh(xdr);
1551                 break;
1552         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1553                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1554                 break;
1555         default:
1556                 BUG();
1557         }
1558 }
1559
1560 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1561 {
1562         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1563         encode_nfs4_stateid(xdr, arg->stateid);
1564         encode_nfs4_seqid(xdr, arg->seqid);
1565 }
1566
1567 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1568 {
1569         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1570         encode_nfs4_stateid(xdr, &arg->stateid);
1571         encode_nfs4_seqid(xdr, arg->seqid);
1572         encode_share_access(xdr, arg->share_access);
1573 }
1574
1575 static void
1576 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1577 {
1578         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1579         encode_string(xdr, fh->size, fh->data);
1580 }
1581
1582 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1583 {
1584         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1585 }
1586
1587 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1588                         struct compound_hdr *hdr)
1589 {
1590         __be32 *p;
1591
1592         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1593         encode_nfs4_stateid(xdr, &args->stateid);
1594
1595         p = reserve_space(xdr, 12);
1596         p = xdr_encode_hyper(p, args->offset);
1597         *p = cpu_to_be32(args->count);
1598 }
1599
1600 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1601 {
1602         uint32_t attrs[3] = {
1603                 FATTR4_WORD0_TYPE
1604                 | FATTR4_WORD0_RDATTR_ERROR,
1605                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1606         };
1607         uint32_t dircount = readdir->count;
1608         uint32_t maxcount = readdir->count;
1609         __be32 *p, verf[2];
1610         uint32_t attrlen = 0;
1611         unsigned int i;
1612
1613         if (readdir->plus) {
1614                 attrs[0] |= FATTR4_WORD0_CHANGE
1615                         | FATTR4_WORD0_SIZE
1616                         | FATTR4_WORD0_FSID
1617                         | FATTR4_WORD0_FILEHANDLE
1618                         | FATTR4_WORD0_FILEID;
1619                 attrs[1] |= FATTR4_WORD1_MODE
1620                         | FATTR4_WORD1_NUMLINKS
1621                         | FATTR4_WORD1_OWNER
1622                         | FATTR4_WORD1_OWNER_GROUP
1623                         | FATTR4_WORD1_RAWDEV
1624                         | FATTR4_WORD1_SPACE_USED
1625                         | FATTR4_WORD1_TIME_ACCESS
1626                         | FATTR4_WORD1_TIME_METADATA
1627                         | FATTR4_WORD1_TIME_MODIFY;
1628                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1629         }
1630         /* Use mounted_on_fileid only if the server supports it */
1631         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1632                 attrs[0] |= FATTR4_WORD0_FILEID;
1633         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1634                 attrs[i] &= readdir->bitmask[i];
1635                 if (attrs[i] != 0)
1636                         attrlen = i+1;
1637         }
1638
1639         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1640         encode_uint64(xdr, readdir->cookie);
1641         encode_nfs4_verifier(xdr, &readdir->verifier);
1642         p = reserve_space(xdr, 12 + (attrlen << 2));
1643         *p++ = cpu_to_be32(dircount);
1644         *p++ = cpu_to_be32(maxcount);
1645         *p++ = cpu_to_be32(attrlen);
1646         for (i = 0; i < attrlen; i++)
1647                 *p++ = cpu_to_be32(attrs[i]);
1648         memcpy(verf, readdir->verifier.data, sizeof(verf));
1649
1650         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1651                         __func__,
1652                         (unsigned long long)readdir->cookie,
1653                         verf[0], verf[1],
1654                         attrs[0] & readdir->bitmask[0],
1655                         attrs[1] & readdir->bitmask[1],
1656                         attrs[2] & readdir->bitmask[2]);
1657 }
1658
1659 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1660 {
1661         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1662 }
1663
1664 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1665 {
1666         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1667         encode_string(xdr, name->len, name->name);
1668 }
1669
1670 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1671 {
1672         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1673         encode_string(xdr, oldname->len, oldname->name);
1674         encode_string(xdr, newname->len, newname->name);
1675 }
1676
1677 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1678                          struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1681         encode_uint64(xdr, clid);
1682 }
1683
1684 static void
1685 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1688 }
1689
1690 static void nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2])
1691 {
1692         switch (type) {
1693         default:
1694                 bitmap[0] = FATTR4_WORD0_ACL;
1695                 bitmap[1] = 0;
1696                 break;
1697         case NFS4ACL_DACL:
1698                 bitmap[0] = 0;
1699                 bitmap[1] = FATTR4_WORD1_DACL;
1700                 break;
1701         case NFS4ACL_SACL:
1702                 bitmap[0] = 0;
1703                 bitmap[1] = FATTR4_WORD1_SACL;
1704         }
1705 }
1706
1707 static void encode_setacl(struct xdr_stream *xdr,
1708                           const struct nfs_setaclargs *arg,
1709                           struct compound_hdr *hdr)
1710 {
1711         __u32 bitmap[2];
1712
1713         nfs4_acltype_to_bitmap(arg->acl_type, bitmap);
1714
1715         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1716         encode_nfs4_stateid(xdr, &zero_stateid);
1717         xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1718         encode_uint32(xdr, arg->acl_len);
1719         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1720 }
1721
1722 static void
1723 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1724 {
1725         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1726 }
1727
1728 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1729 {
1730         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1731         encode_nfs4_stateid(xdr, &arg->stateid);
1732         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1733                         server->attr_bitmask);
1734 }
1735
1736 static void encode_delegattr(struct xdr_stream *xdr,
1737                 const nfs4_stateid *stateid,
1738                 const struct nfs4_delegattr *attr,
1739                 struct compound_hdr *hdr)
1740 {
1741         uint32_t bitmap[3] = { 0 };
1742         uint32_t len = 0;
1743         __be32 *p;
1744
1745         encode_op_hdr(xdr, OP_SETATTR, encode_delegattr_maxsz, hdr);
1746         encode_nfs4_stateid(xdr, stateid);
1747         if (attr->atime_set) {
1748                 bitmap[2] |= FATTR4_WORD2_TIME_DELEG_ACCESS;
1749                 len += (nfstime4_maxsz << 2);
1750         }
1751         if (attr->mtime_set) {
1752                 bitmap[2] |= FATTR4_WORD2_TIME_DELEG_MODIFY;
1753                 len += (nfstime4_maxsz << 2);
1754         }
1755         xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1756         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1757         if (bitmap[2] & FATTR4_WORD2_TIME_DELEG_ACCESS)
1758                 p = xdr_encode_nfstime4(p, &attr->atime);
1759         if (bitmap[2] & FATTR4_WORD2_TIME_DELEG_MODIFY)
1760                 p = xdr_encode_nfstime4(p, &attr->mtime);
1761 }
1762
1763 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1764 {
1765         __be32 *p;
1766
1767         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1768         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1769
1770         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1771                         setclientid->sc_clnt->cl_owner_id);
1772         p = reserve_space(xdr, 4);
1773         *p = cpu_to_be32(setclientid->sc_prog);
1774         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1775         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1776         p = reserve_space(xdr, 4);
1777         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1778 }
1779
1780 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1781 {
1782         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1783                         decode_setclientid_confirm_maxsz, hdr);
1784         encode_uint64(xdr, arg->clientid);
1785         encode_nfs4_verifier(xdr, &arg->confirm);
1786 }
1787
1788 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1789                          struct compound_hdr *hdr)
1790 {
1791         __be32 *p;
1792
1793         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1794         encode_nfs4_stateid(xdr, &args->stateid);
1795
1796         p = reserve_space(xdr, 16);
1797         p = xdr_encode_hyper(p, args->offset);
1798         *p++ = cpu_to_be32(args->stable);
1799         *p = cpu_to_be32(args->count);
1800
1801         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1802 }
1803
1804 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1805 {
1806         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1807         encode_nfs4_stateid(xdr, stateid);
1808 }
1809
1810 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1811 {
1812         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1813         encode_string(xdr, name->len, name->name);
1814 }
1815
1816 #if defined(CONFIG_NFS_V4_1)
1817 /* NFSv4.1 operations */
1818 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1819                                    const struct nfs41_bind_conn_to_session_args *args,
1820                                    struct compound_hdr *hdr)
1821 {
1822         __be32 *p;
1823
1824         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1825                 decode_bind_conn_to_session_maxsz, hdr);
1826         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1827         p = xdr_reserve_space(xdr, 8);
1828         *p++ = cpu_to_be32(args->dir);
1829         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1830 }
1831
1832 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1833 {
1834         unsigned int i;
1835         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1836         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1837                 encode_uint32(xdr, op_map->u.words[i]);
1838 }
1839
1840 static void encode_exchange_id(struct xdr_stream *xdr,
1841                                const struct nfs41_exchange_id_args *args,
1842                                struct compound_hdr *hdr)
1843 {
1844         __be32 *p;
1845         char impl_name[IMPL_NAME_LIMIT];
1846         int len = 0;
1847
1848         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1849         encode_nfs4_verifier(xdr, &args->verifier);
1850
1851         encode_string(xdr, strlen(args->client->cl_owner_id),
1852                         args->client->cl_owner_id);
1853
1854         encode_uint32(xdr, args->flags);
1855         encode_uint32(xdr, args->state_protect.how);
1856
1857         switch (args->state_protect.how) {
1858         case SP4_NONE:
1859                 break;
1860         case SP4_MACH_CRED:
1861                 encode_op_map(xdr, &args->state_protect.enforce);
1862                 encode_op_map(xdr, &args->state_protect.allow);
1863                 break;
1864         default:
1865                 WARN_ON_ONCE(1);
1866                 break;
1867         }
1868
1869         if (send_implementation_id &&
1870             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1871             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1872                 <= sizeof(impl_name) + 1)
1873                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1874                                utsname()->sysname, utsname()->release,
1875                                utsname()->version, utsname()->machine);
1876
1877         if (len > 0) {
1878                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1879
1880                 encode_string(xdr,
1881                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1882                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1883                 encode_string(xdr, len, impl_name);
1884                 /* just send zeros for nii_date - the date is in nii_name */
1885                 p = reserve_space(xdr, 12);
1886                 p = xdr_encode_hyper(p, 0);
1887                 *p = cpu_to_be32(0);
1888         } else
1889                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1890 }
1891
1892 static void encode_create_session(struct xdr_stream *xdr,
1893                                   const struct nfs41_create_session_args *args,
1894                                   struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897         struct nfs_client *clp = args->client;
1898         struct rpc_clnt *clnt = clp->cl_rpcclient;
1899         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1900         u32 max_resp_sz_cached;
1901
1902         /*
1903          * Assumes OPEN is the biggest non-idempotent compound.
1904          * 2 is the verifier.
1905          */
1906         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1907                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1908
1909         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1910         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1911         p = xdr_encode_hyper(p, args->clientid);
1912         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1913         *p++ = cpu_to_be32(args->flags);                        /*flags */
1914
1915         /* Fore Channel */
1916         *p++ = cpu_to_be32(0);                          /* header padding size */
1917         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1918         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1919         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1920         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1921         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1922         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1923
1924         /* Back Channel */
1925         *p++ = cpu_to_be32(0);                          /* header padding size */
1926         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1927         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1928         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1929         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1930         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1931         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1932
1933         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1934         *p++ = cpu_to_be32(1);
1935         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1936
1937         /* authsys_parms rfc1831 */
1938         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1939         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1940         *p++ = cpu_to_be32(0);                          /* UID */
1941         *p++ = cpu_to_be32(0);                          /* GID */
1942         *p = cpu_to_be32(0);                            /* No more gids */
1943 }
1944
1945 static void encode_destroy_session(struct xdr_stream *xdr,
1946                                    const struct nfs4_session *session,
1947                                    struct compound_hdr *hdr)
1948 {
1949         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1950         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1951 }
1952
1953 static void encode_destroy_clientid(struct xdr_stream *xdr,
1954                                    uint64_t clientid,
1955                                    struct compound_hdr *hdr)
1956 {
1957         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1958         encode_uint64(xdr, clientid);
1959 }
1960
1961 static void encode_reclaim_complete(struct xdr_stream *xdr,
1962                                     const struct nfs41_reclaim_complete_args *args,
1963                                     struct compound_hdr *hdr)
1964 {
1965         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1966         encode_uint32(xdr, args->one_fs);
1967 }
1968 #endif /* CONFIG_NFS_V4_1 */
1969
1970 static void encode_sequence(struct xdr_stream *xdr,
1971                             const struct nfs4_sequence_args *args,
1972                             struct compound_hdr *hdr)
1973 {
1974 #if defined(CONFIG_NFS_V4_1)
1975         struct nfs4_session *session;
1976         struct nfs4_slot_table *tp;
1977         struct nfs4_slot *slot = args->sa_slot;
1978         __be32 *p;
1979
1980         tp = slot->table;
1981         session = tp->session;
1982         if (!session)
1983                 return;
1984
1985         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1986
1987         /*
1988          * Sessionid + seqid + slotid + max slotid + cache_this
1989          */
1990         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1991                 "max_slotid=%d cache_this=%d\n",
1992                 __func__,
1993                 ((u32 *)session->sess_id.data)[0],
1994                 ((u32 *)session->sess_id.data)[1],
1995                 ((u32 *)session->sess_id.data)[2],
1996                 ((u32 *)session->sess_id.data)[3],
1997                 slot->seq_nr, slot->slot_nr,
1998                 tp->highest_used_slotid, args->sa_cache_this);
1999         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
2000         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
2001         *p++ = cpu_to_be32(slot->seq_nr);
2002         *p++ = cpu_to_be32(slot->slot_nr);
2003         *p++ = cpu_to_be32(tp->highest_used_slotid);
2004         *p = cpu_to_be32(args->sa_cache_this);
2005 #endif /* CONFIG_NFS_V4_1 */
2006 }
2007
2008 #ifdef CONFIG_NFS_V4_1
2009 static void
2010 encode_getdeviceinfo(struct xdr_stream *xdr,
2011                      const struct nfs4_getdeviceinfo_args *args,
2012                      struct compound_hdr *hdr)
2013 {
2014         __be32 *p;
2015
2016         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
2017         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
2018         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
2019                                     NFS4_DEVICEID4_SIZE);
2020         *p++ = cpu_to_be32(args->pdev->layout_type);
2021         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
2022
2023         p = reserve_space(xdr, 4 + 4);
2024         *p++ = cpu_to_be32(1);                  /* bitmap length */
2025         *p++ = cpu_to_be32(args->notify_types);
2026 }
2027
2028 static void
2029 encode_layoutget(struct xdr_stream *xdr,
2030                       const struct nfs4_layoutget_args *args,
2031                       struct compound_hdr *hdr)
2032 {
2033         __be32 *p;
2034
2035         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
2036         p = reserve_space(xdr, 36);
2037         *p++ = cpu_to_be32(0);     /* Signal layout available */
2038         *p++ = cpu_to_be32(args->type);
2039         *p++ = cpu_to_be32(args->range.iomode);
2040         p = xdr_encode_hyper(p, args->range.offset);
2041         p = xdr_encode_hyper(p, args->range.length);
2042         p = xdr_encode_hyper(p, args->minlength);
2043         encode_nfs4_stateid(xdr, &args->stateid);
2044         encode_uint32(xdr, args->maxcount);
2045
2046         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
2047                 __func__,
2048                 args->type,
2049                 args->range.iomode,
2050                 (unsigned long)args->range.offset,
2051                 (unsigned long)args->range.length,
2052                 args->maxcount);
2053 }
2054
2055 static int
2056 encode_layoutcommit(struct xdr_stream *xdr,
2057                     struct inode *inode,
2058                     const struct nfs4_layoutcommit_args *args,
2059                     struct compound_hdr *hdr)
2060 {
2061         __be32 *p;
2062
2063         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2064                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2065
2066         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2067         p = reserve_space(xdr, 20);
2068         /* Only whole file layouts */
2069         p = xdr_encode_hyper(p, 0); /* offset */
2070         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2071         *p = cpu_to_be32(0); /* reclaim */
2072         encode_nfs4_stateid(xdr, &args->stateid);
2073         if (args->lastbytewritten != U64_MAX) {
2074                 p = reserve_space(xdr, 20);
2075                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2076                 p = xdr_encode_hyper(p, args->lastbytewritten);
2077         } else {
2078                 p = reserve_space(xdr, 12);
2079                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2080         }
2081         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2082         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2083
2084         encode_uint32(xdr, args->layoutupdate_len);
2085         if (args->layoutupdate_pages)
2086                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2087                                 args->layoutupdate_len);
2088
2089         return 0;
2090 }
2091
2092 static void
2093 encode_layoutreturn(struct xdr_stream *xdr,
2094                     const struct nfs4_layoutreturn_args *args,
2095                     struct compound_hdr *hdr)
2096 {
2097         __be32 *p;
2098
2099         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2100         p = reserve_space(xdr, 16);
2101         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2102         *p++ = cpu_to_be32(args->layout_type);
2103         *p++ = cpu_to_be32(args->range.iomode);
2104         *p = cpu_to_be32(RETURN_FILE);
2105         p = reserve_space(xdr, 16);
2106         p = xdr_encode_hyper(p, args->range.offset);
2107         p = xdr_encode_hyper(p, args->range.length);
2108         spin_lock(&args->inode->i_lock);
2109         encode_nfs4_stateid(xdr, &args->stateid);
2110         spin_unlock(&args->inode->i_lock);
2111         if (args->ld_private->ops && args->ld_private->ops->encode)
2112                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2113         else
2114                 encode_uint32(xdr, 0);
2115 }
2116
2117 static int
2118 encode_secinfo_no_name(struct xdr_stream *xdr,
2119                        const struct nfs41_secinfo_no_name_args *args,
2120                        struct compound_hdr *hdr)
2121 {
2122         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2123         encode_uint32(xdr, args->style);
2124         return 0;
2125 }
2126
2127 static void encode_test_stateid(struct xdr_stream *xdr,
2128                                 const struct nfs41_test_stateid_args *args,
2129                                 struct compound_hdr *hdr)
2130 {
2131         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2132         encode_uint32(xdr, 1);
2133         encode_nfs4_stateid(xdr, &args->stateid);
2134 }
2135
2136 static void encode_free_stateid(struct xdr_stream *xdr,
2137                                 const struct nfs41_free_stateid_args *args,
2138                                 struct compound_hdr *hdr)
2139 {
2140         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2141         encode_nfs4_stateid(xdr, &args->stateid);
2142 }
2143 #else
2144 static inline void
2145 encode_layoutreturn(struct xdr_stream *xdr,
2146                     const struct nfs4_layoutreturn_args *args,
2147                     struct compound_hdr *hdr)
2148 {
2149 }
2150
2151 static void
2152 encode_layoutget(struct xdr_stream *xdr,
2153                       const struct nfs4_layoutget_args *args,
2154                       struct compound_hdr *hdr)
2155 {
2156 }
2157 #endif /* CONFIG_NFS_V4_1 */
2158
2159 /*
2160  * END OF "GENERIC" ENCODE ROUTINES.
2161  */
2162
2163 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2164 {
2165 #if defined(CONFIG_NFS_V4_1)
2166         struct nfs4_session *session = args->sa_slot->table->session;
2167         if (session)
2168                 return session->clp->cl_mvops->minor_version;
2169 #endif /* CONFIG_NFS_V4_1 */
2170         return 0;
2171 }
2172
2173 /*
2174  * Encode an ACCESS request
2175  */
2176 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                                 const void *data)
2178 {
2179         const struct nfs4_accessargs *args = data;
2180         struct compound_hdr hdr = {
2181                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2182         };
2183
2184         encode_compound_hdr(xdr, req, &hdr);
2185         encode_sequence(xdr, &args->seq_args, &hdr);
2186         encode_putfh(xdr, args->fh, &hdr);
2187         encode_access(xdr, args->access, &hdr);
2188         if (args->bitmask)
2189                 encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_nops(&hdr);
2191 }
2192
2193 /*
2194  * Encode LOOKUP request
2195  */
2196 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2197                                 const void *data)
2198 {
2199         const struct nfs4_lookup_arg *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->dir_fh, &hdr);
2207         encode_lookup(xdr, args->name, &hdr);
2208         encode_getfh(xdr, &hdr);
2209         encode_getfattr(xdr, args->bitmask, &hdr);
2210         encode_nops(&hdr);
2211 }
2212
2213 /*
2214  * Encode LOOKUPP request
2215  */
2216 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2217                 const void *data)
2218 {
2219         const struct nfs4_lookupp_arg *args = data;
2220         struct compound_hdr hdr = {
2221                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2222         };
2223
2224         encode_compound_hdr(xdr, req, &hdr);
2225         encode_sequence(xdr, &args->seq_args, &hdr);
2226         encode_putfh(xdr, args->fh, &hdr);
2227         encode_lookupp(xdr, &hdr);
2228         encode_getfh(xdr, &hdr);
2229         encode_getfattr(xdr, args->bitmask, &hdr);
2230         encode_nops(&hdr);
2231 }
2232
2233 /*
2234  * Encode LOOKUP_ROOT request
2235  */
2236 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2237                                      struct xdr_stream *xdr,
2238                                      const void *data)
2239 {
2240         const struct nfs4_lookup_root_arg *args = data;
2241         struct compound_hdr hdr = {
2242                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243         };
2244
2245         encode_compound_hdr(xdr, req, &hdr);
2246         encode_sequence(xdr, &args->seq_args, &hdr);
2247         encode_putrootfh(xdr, &hdr);
2248         encode_getfh(xdr, &hdr);
2249         encode_getfattr(xdr, args->bitmask, &hdr);
2250         encode_nops(&hdr);
2251 }
2252
2253 /*
2254  * Encode REMOVE request
2255  */
2256 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2257                                 const void *data)
2258 {
2259         const struct nfs_removeargs *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->fh, &hdr);
2267         encode_remove(xdr, &args->name, &hdr);
2268         encode_nops(&hdr);
2269 }
2270
2271 /*
2272  * Encode RENAME request
2273  */
2274 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2275                                 const void *data)
2276 {
2277         const struct nfs_renameargs *args = data;
2278         struct compound_hdr hdr = {
2279                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2280         };
2281
2282         encode_compound_hdr(xdr, req, &hdr);
2283         encode_sequence(xdr, &args->seq_args, &hdr);
2284         encode_putfh(xdr, args->old_dir, &hdr);
2285         encode_savefh(xdr, &hdr);
2286         encode_putfh(xdr, args->new_dir, &hdr);
2287         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2288         encode_nops(&hdr);
2289 }
2290
2291 /*
2292  * Encode LINK request
2293  */
2294 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2295                               const void *data)
2296 {
2297         const struct nfs4_link_arg *args = data;
2298         struct compound_hdr hdr = {
2299                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2300         };
2301
2302         encode_compound_hdr(xdr, req, &hdr);
2303         encode_sequence(xdr, &args->seq_args, &hdr);
2304         encode_putfh(xdr, args->fh, &hdr);
2305         encode_savefh(xdr, &hdr);
2306         encode_putfh(xdr, args->dir_fh, &hdr);
2307         encode_link(xdr, args->name, &hdr);
2308         encode_restorefh(xdr, &hdr);
2309         encode_getfattr(xdr, args->bitmask, &hdr);
2310         encode_nops(&hdr);
2311 }
2312
2313 /*
2314  * Encode CREATE request
2315  */
2316 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2317                                 const void *data)
2318 {
2319         const struct nfs4_create_arg *args = data;
2320         struct compound_hdr hdr = {
2321                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2322         };
2323
2324         encode_compound_hdr(xdr, req, &hdr);
2325         encode_sequence(xdr, &args->seq_args, &hdr);
2326         encode_putfh(xdr, args->dir_fh, &hdr);
2327         encode_create(xdr, args, &hdr);
2328         encode_getfh(xdr, &hdr);
2329         encode_getfattr(xdr, args->bitmask, &hdr);
2330         encode_nops(&hdr);
2331 }
2332
2333 /*
2334  * Encode SYMLINK request
2335  */
2336 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2337                                  const void *data)
2338 {
2339         const struct nfs4_create_arg *args = data;
2340
2341         nfs4_xdr_enc_create(req, xdr, args);
2342 }
2343
2344 /*
2345  * Encode GETATTR request
2346  */
2347 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2348                                  const void *data)
2349 {
2350         const struct nfs4_getattr_arg *args = data;
2351         struct compound_hdr hdr = {
2352                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2353         };
2354
2355         encode_compound_hdr(xdr, req, &hdr);
2356         encode_sequence(xdr, &args->seq_args, &hdr);
2357         encode_putfh(xdr, args->fh, &hdr);
2358         encode_getfattr(xdr, args->bitmask, &hdr);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode a CLOSE request
2364  */
2365 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2366                                const void *data)
2367 {
2368         const struct nfs_closeargs *args = data;
2369         struct compound_hdr hdr = {
2370                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371         };
2372
2373         encode_compound_hdr(xdr, req, &hdr);
2374         encode_sequence(xdr, &args->seq_args, &hdr);
2375         encode_putfh(xdr, args->fh, &hdr);
2376         if (args->lr_args)
2377                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2378         if (args->bitmask != NULL)
2379                 encode_getfattr(xdr, args->bitmask, &hdr);
2380         encode_close(xdr, args, &hdr);
2381         encode_nops(&hdr);
2382 }
2383
2384 /*
2385  * Encode an OPEN request
2386  */
2387 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2388                               const void *data)
2389 {
2390         const struct nfs_openargs *args = data;
2391         struct compound_hdr hdr = {
2392                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2393         };
2394
2395         encode_compound_hdr(xdr, req, &hdr);
2396         encode_sequence(xdr, &args->seq_args, &hdr);
2397         encode_putfh(xdr, args->fh, &hdr);
2398         encode_open(xdr, args, &hdr);
2399         encode_getfh(xdr, &hdr);
2400         if (args->access)
2401                 encode_access(xdr, args->access, &hdr);
2402         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2403         if (args->lg_args) {
2404                 encode_layoutget(xdr, args->lg_args, &hdr);
2405                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2406                                         args->lg_args->layout.pglen,
2407                                         hdr.replen - pagepad_maxsz);
2408         }
2409         encode_nops(&hdr);
2410 }
2411
2412 /*
2413  * Encode an OPEN_CONFIRM request
2414  */
2415 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2416                                       struct xdr_stream *xdr,
2417                                       const void *data)
2418 {
2419         const struct nfs_open_confirmargs *args = data;
2420         struct compound_hdr hdr = {
2421                 .nops   = 0,
2422         };
2423
2424         encode_compound_hdr(xdr, req, &hdr);
2425         encode_putfh(xdr, args->fh, &hdr);
2426         encode_open_confirm(xdr, args, &hdr);
2427         encode_nops(&hdr);
2428 }
2429
2430 /*
2431  * Encode an OPEN request with no attributes.
2432  */
2433 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2434                                      struct xdr_stream *xdr,
2435                                      const void *data)
2436 {
2437         const struct nfs_openargs *args = data;
2438         struct compound_hdr hdr = {
2439                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2440         };
2441
2442         encode_compound_hdr(xdr, req, &hdr);
2443         encode_sequence(xdr, &args->seq_args, &hdr);
2444         encode_putfh(xdr, args->fh, &hdr);
2445         encode_open(xdr, args, &hdr);
2446         if (args->access)
2447                 encode_access(xdr, args->access, &hdr);
2448         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2449         if (args->lg_args) {
2450                 encode_layoutget(xdr, args->lg_args, &hdr);
2451                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2452                                         args->lg_args->layout.pglen,
2453                                         hdr.replen - pagepad_maxsz);
2454         }
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * Encode an OPEN_DOWNGRADE request
2460  */
2461 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2462                                         struct xdr_stream *xdr,
2463                                         const void *data)
2464 {
2465         const struct nfs_closeargs *args = data;
2466         struct compound_hdr hdr = {
2467                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2468         };
2469
2470         encode_compound_hdr(xdr, req, &hdr);
2471         encode_sequence(xdr, &args->seq_args, &hdr);
2472         encode_putfh(xdr, args->fh, &hdr);
2473         if (args->lr_args)
2474                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2475         encode_open_downgrade(xdr, args, &hdr);
2476         encode_nops(&hdr);
2477 }
2478
2479 /*
2480  * Encode a LOCK request
2481  */
2482 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2483                               const void *data)
2484 {
2485         const struct nfs_lock_args *args = data;
2486         struct compound_hdr hdr = {
2487                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2488         };
2489
2490         encode_compound_hdr(xdr, req, &hdr);
2491         encode_sequence(xdr, &args->seq_args, &hdr);
2492         encode_putfh(xdr, args->fh, &hdr);
2493         encode_lock(xdr, args, &hdr);
2494         encode_nops(&hdr);
2495 }
2496
2497 /*
2498  * Encode a LOCKT request
2499  */
2500 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2501                                const void *data)
2502 {
2503         const struct nfs_lockt_args *args = data;
2504         struct compound_hdr hdr = {
2505                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_sequence(xdr, &args->seq_args, &hdr);
2510         encode_putfh(xdr, args->fh, &hdr);
2511         encode_lockt(xdr, args, &hdr);
2512         encode_nops(&hdr);
2513 }
2514
2515 /*
2516  * Encode a LOCKU request
2517  */
2518 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2519                                const void *data)
2520 {
2521         const struct nfs_locku_args *args = data;
2522         struct compound_hdr hdr = {
2523                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2524         };
2525
2526         encode_compound_hdr(xdr, req, &hdr);
2527         encode_sequence(xdr, &args->seq_args, &hdr);
2528         encode_putfh(xdr, args->fh, &hdr);
2529         encode_locku(xdr, args, &hdr);
2530         encode_nops(&hdr);
2531 }
2532
2533 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2534                                            struct xdr_stream *xdr,
2535                                            const void *data)
2536 {
2537         const struct nfs_release_lockowner_args *args = data;
2538         struct compound_hdr hdr = {
2539                 .minorversion = 0,
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2544         encode_nops(&hdr);
2545 }
2546
2547 /*
2548  * Encode a READLINK request
2549  */
2550 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2551                                   const void *data)
2552 {
2553         const struct nfs4_readlink *args = data;
2554         struct compound_hdr hdr = {
2555                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2556         };
2557
2558         encode_compound_hdr(xdr, req, &hdr);
2559         encode_sequence(xdr, &args->seq_args, &hdr);
2560         encode_putfh(xdr, args->fh, &hdr);
2561         encode_readlink(xdr, args, req, &hdr);
2562
2563         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2564                                 args->pglen, hdr.replen - pagepad_maxsz);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * Encode a READDIR request
2570  */
2571 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                  const void *data)
2573 {
2574         const struct nfs4_readdir_arg *args = data;
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, &args->seq_args, &hdr);
2581         encode_putfh(xdr, args->fh, &hdr);
2582         encode_readdir(xdr, args, req, &hdr);
2583
2584         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2585                                 args->count, hdr.replen - pagepad_maxsz);
2586         encode_nops(&hdr);
2587 }
2588
2589 /*
2590  * Encode a READ request
2591  */
2592 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2593                               const void *data)
2594 {
2595         const struct nfs_pgio_args *args = data;
2596         struct compound_hdr hdr = {
2597                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598         };
2599
2600         encode_compound_hdr(xdr, req, &hdr);
2601         encode_sequence(xdr, &args->seq_args, &hdr);
2602         encode_putfh(xdr, args->fh, &hdr);
2603         encode_read(xdr, args, &hdr);
2604
2605         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2606                                 args->count, hdr.replen - pagepad_maxsz);
2607         req->rq_rcv_buf.flags |= XDRBUF_READ;
2608         encode_nops(&hdr);
2609 }
2610
2611 /*
2612  * Encode an SETATTR request
2613  */
2614 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2615                                  const void *data)
2616 {
2617         const struct nfs_setattrargs *args = data;
2618         struct compound_hdr hdr = {
2619                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2620         };
2621
2622         encode_compound_hdr(xdr, req, &hdr);
2623         encode_sequence(xdr, &args->seq_args, &hdr);
2624         encode_putfh(xdr, args->fh, &hdr);
2625         encode_setattr(xdr, args, args->server, &hdr);
2626         encode_getfattr(xdr, args->bitmask, &hdr);
2627         encode_nops(&hdr);
2628 }
2629
2630 /*
2631  * Encode a GETACL request
2632  */
2633 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2634                                 const void *data)
2635 {
2636         const struct nfs_getaclargs *args = data;
2637         struct compound_hdr hdr = {
2638                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2639         };
2640         __u32 nfs4_acl_bitmap[2];
2641         uint32_t replen;
2642
2643         nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap);
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->fh, &hdr);
2648         replen = hdr.replen + op_decode_hdr_maxsz;
2649         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2650                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2651
2652         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2653                                 args->acl_len, replen);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * Encode a WRITE request
2659  */
2660 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2661                                const void *data)
2662 {
2663         const struct nfs_pgio_args *args = data;
2664         struct compound_hdr hdr = {
2665                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_sequence(xdr, &args->seq_args, &hdr);
2670         encode_putfh(xdr, args->fh, &hdr);
2671         encode_write(xdr, args, &hdr);
2672         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2673         if (args->bitmask)
2674                 encode_getfattr(xdr, args->bitmask, &hdr);
2675         encode_nops(&hdr);
2676 }
2677
2678 /*
2679  *  a COMMIT request
2680  */
2681 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2682                                 const void *data)
2683 {
2684         const struct nfs_commitargs *args = data;
2685         struct compound_hdr hdr = {
2686                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2687         };
2688
2689         encode_compound_hdr(xdr, req, &hdr);
2690         encode_sequence(xdr, &args->seq_args, &hdr);
2691         encode_putfh(xdr, args->fh, &hdr);
2692         encode_commit(xdr, args, &hdr);
2693         encode_nops(&hdr);
2694 }
2695
2696 /*
2697  * FSINFO request
2698  */
2699 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2700                                 const void *data)
2701 {
2702         const struct nfs4_fsinfo_arg *args = data;
2703         struct compound_hdr hdr = {
2704                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2705         };
2706
2707         encode_compound_hdr(xdr, req, &hdr);
2708         encode_sequence(xdr, &args->seq_args, &hdr);
2709         encode_putfh(xdr, args->fh, &hdr);
2710         encode_fsinfo(xdr, args->bitmask, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * a PATHCONF request
2716  */
2717 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2718                                   const void *data)
2719 {
2720         const struct nfs4_pathconf_arg *args = data;
2721         struct compound_hdr hdr = {
2722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2723         };
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_sequence(xdr, &args->seq_args, &hdr);
2727         encode_putfh(xdr, args->fh, &hdr);
2728         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2729                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2730         encode_nops(&hdr);
2731 }
2732
2733 /*
2734  * a STATFS request
2735  */
2736 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2737                                 const void *data)
2738 {
2739         const struct nfs4_statfs_arg *args = data;
2740         struct compound_hdr hdr = {
2741                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2742         };
2743
2744         encode_compound_hdr(xdr, req, &hdr);
2745         encode_sequence(xdr, &args->seq_args, &hdr);
2746         encode_putfh(xdr, args->fh, &hdr);
2747         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2748                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2749         encode_nops(&hdr);
2750 }
2751
2752 /*
2753  * GETATTR_BITMAP request
2754  */
2755 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2756                                      struct xdr_stream *xdr,
2757                                      const void *data)
2758 {
2759         const struct nfs4_server_caps_arg *args = data;
2760         const u32 *bitmask = args->bitmask;
2761         struct compound_hdr hdr = {
2762                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2763         };
2764
2765         encode_compound_hdr(xdr, req, &hdr);
2766         encode_sequence(xdr, &args->seq_args, &hdr);
2767         encode_putfh(xdr, args->fhandle, &hdr);
2768         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2769         encode_nops(&hdr);
2770 }
2771
2772 /*
2773  * a RENEW request
2774  */
2775 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2776                                const void *data)
2777
2778 {
2779         const struct nfs_client *clp = data;
2780         struct compound_hdr hdr = {
2781                 .nops   = 0,
2782         };
2783
2784         encode_compound_hdr(xdr, req, &hdr);
2785         encode_renew(xdr, clp->cl_clientid, &hdr);
2786         encode_nops(&hdr);
2787 }
2788
2789 /*
2790  * a SETCLIENTID request
2791  */
2792 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2793                                      struct xdr_stream *xdr,
2794                                      const void *data)
2795 {
2796         const struct nfs4_setclientid *sc = data;
2797         struct compound_hdr hdr = {
2798                 .nops   = 0,
2799         };
2800
2801         encode_compound_hdr(xdr, req, &hdr);
2802         encode_setclientid(xdr, sc, &hdr);
2803         encode_nops(&hdr);
2804 }
2805
2806 /*
2807  * a SETCLIENTID_CONFIRM request
2808  */
2809 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2810                                              struct xdr_stream *xdr,
2811                                              const void *data)
2812 {
2813         const struct nfs4_setclientid_res *arg = data;
2814         struct compound_hdr hdr = {
2815                 .nops   = 0,
2816         };
2817
2818         encode_compound_hdr(xdr, req, &hdr);
2819         encode_setclientid_confirm(xdr, arg, &hdr);
2820         encode_nops(&hdr);
2821 }
2822
2823 /*
2824  * DELEGRETURN request
2825  */
2826 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2827                                      struct xdr_stream *xdr,
2828                                      const void *data)
2829 {
2830         const struct nfs4_delegreturnargs *args = data;
2831         struct compound_hdr hdr = {
2832                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2833         };
2834
2835         encode_compound_hdr(xdr, req, &hdr);
2836         encode_sequence(xdr, &args->seq_args, &hdr);
2837         encode_putfh(xdr, args->fhandle, &hdr);
2838         if (args->lr_args)
2839                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2840         if (args->sattr_args)
2841                 encode_delegattr(xdr, args->stateid, args->sattr_args, &hdr);
2842         if (args->bitmask)
2843                 encode_getfattr(xdr, args->bitmask, &hdr);
2844         encode_delegreturn(xdr, args->stateid, &hdr);
2845         encode_nops(&hdr);
2846 }
2847
2848 /*
2849  * Encode FS_LOCATIONS request
2850  */
2851 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2852                                       struct xdr_stream *xdr,
2853                                       const void *data)
2854 {
2855         const struct nfs4_fs_locations_arg *args = data;
2856         struct compound_hdr hdr = {
2857                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2858         };
2859         uint32_t replen;
2860
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_sequence(xdr, &args->seq_args, &hdr);
2863         if (args->migration) {
2864                 encode_putfh(xdr, args->fh, &hdr);
2865                 replen = hdr.replen;
2866                 encode_fs_locations(xdr, args->bitmask, &hdr);
2867                 if (args->renew)
2868                         encode_renew(xdr, args->clientid, &hdr);
2869         } else {
2870                 encode_putfh(xdr, args->dir_fh, &hdr);
2871                 encode_lookup(xdr, args->name, &hdr);
2872                 replen = hdr.replen;
2873                 encode_fs_locations(xdr, args->bitmask, &hdr);
2874         }
2875
2876         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2877                                 PAGE_SIZE, replen);
2878         encode_nops(&hdr);
2879 }
2880
2881 /*
2882  * Encode SECINFO request
2883  */
2884 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2885                                 struct xdr_stream *xdr,
2886                                 const void *data)
2887 {
2888         const struct nfs4_secinfo_arg *args = data;
2889         struct compound_hdr hdr = {
2890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->seq_args, &hdr);
2895         encode_putfh(xdr, args->dir_fh, &hdr);
2896         encode_secinfo(xdr, args->name, &hdr);
2897         encode_nops(&hdr);
2898 }
2899
2900 /*
2901  * Encode FSID_PRESENT request
2902  */
2903 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2904                                       struct xdr_stream *xdr,
2905                                       const void *data)
2906 {
2907         const struct nfs4_fsid_present_arg *args = data;
2908         struct compound_hdr hdr = {
2909                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910         };
2911
2912         encode_compound_hdr(xdr, req, &hdr);
2913         encode_sequence(xdr, &args->seq_args, &hdr);
2914         encode_putfh(xdr, args->fh, &hdr);
2915         encode_getfh(xdr, &hdr);
2916         if (args->renew)
2917                 encode_renew(xdr, args->clientid, &hdr);
2918         encode_nops(&hdr);
2919 }
2920
2921 #if defined(CONFIG_NFS_V4_1)
2922 /*
2923  * BIND_CONN_TO_SESSION request
2924  */
2925 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2926                                 struct xdr_stream *xdr,
2927                                 const void *data)
2928 {
2929         const struct nfs41_bind_conn_to_session_args *args = data;
2930         struct compound_hdr hdr = {
2931                 .minorversion = args->client->cl_mvops->minor_version,
2932         };
2933
2934         encode_compound_hdr(xdr, req, &hdr);
2935         encode_bind_conn_to_session(xdr, args, &hdr);
2936         encode_nops(&hdr);
2937 }
2938
2939 /*
2940  * EXCHANGE_ID request
2941  */
2942 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2943                                      struct xdr_stream *xdr,
2944                                      const void *data)
2945 {
2946         const struct nfs41_exchange_id_args *args = data;
2947         struct compound_hdr hdr = {
2948                 .minorversion = args->client->cl_mvops->minor_version,
2949         };
2950
2951         encode_compound_hdr(xdr, req, &hdr);
2952         encode_exchange_id(xdr, args, &hdr);
2953         encode_nops(&hdr);
2954 }
2955
2956 /*
2957  * a CREATE_SESSION request
2958  */
2959 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2960                                         struct xdr_stream *xdr,
2961                                         const void *data)
2962 {
2963         const struct nfs41_create_session_args *args = data;
2964         struct compound_hdr hdr = {
2965                 .minorversion = args->client->cl_mvops->minor_version,
2966         };
2967
2968         encode_compound_hdr(xdr, req, &hdr);
2969         encode_create_session(xdr, args, &hdr);
2970         encode_nops(&hdr);
2971 }
2972
2973 /*
2974  * a DESTROY_SESSION request
2975  */
2976 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2977                                          struct xdr_stream *xdr,
2978                                          const void *data)
2979 {
2980         const struct nfs4_session *session = data;
2981         struct compound_hdr hdr = {
2982                 .minorversion = session->clp->cl_mvops->minor_version,
2983         };
2984
2985         encode_compound_hdr(xdr, req, &hdr);
2986         encode_destroy_session(xdr, session, &hdr);
2987         encode_nops(&hdr);
2988 }
2989
2990 /*
2991  * a DESTROY_CLIENTID request
2992  */
2993 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2994                                          struct xdr_stream *xdr,
2995                                          const void *data)
2996 {
2997         const struct nfs_client *clp = data;
2998         struct compound_hdr hdr = {
2999                 .minorversion = clp->cl_mvops->minor_version,
3000         };
3001
3002         encode_compound_hdr(xdr, req, &hdr);
3003         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
3004         encode_nops(&hdr);
3005 }
3006
3007 /*
3008  * a SEQUENCE request
3009  */
3010 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
3011                                   const void *data)
3012 {
3013         const struct nfs4_sequence_args *args = data;
3014         struct compound_hdr hdr = {
3015                 .minorversion = nfs4_xdr_minorversion(args),
3016         };
3017
3018         encode_compound_hdr(xdr, req, &hdr);
3019         encode_sequence(xdr, args, &hdr);
3020         encode_nops(&hdr);
3021 }
3022
3023 #endif
3024
3025 /*
3026  * a GET_LEASE_TIME request
3027  */
3028 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
3029                                         struct xdr_stream *xdr,
3030                                         const void *data)
3031 {
3032         const struct nfs4_get_lease_time_args *args = data;
3033         struct compound_hdr hdr = {
3034                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
3035         };
3036         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
3037
3038         encode_compound_hdr(xdr, req, &hdr);
3039         encode_sequence(xdr, &args->la_seq_args, &hdr);
3040         encode_putrootfh(xdr, &hdr);
3041         encode_fsinfo(xdr, lease_bitmap, &hdr);
3042         encode_nops(&hdr);
3043 }
3044
3045 #ifdef CONFIG_NFS_V4_1
3046
3047 /*
3048  * a RECLAIM_COMPLETE request
3049  */
3050 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
3051                                           struct xdr_stream *xdr,
3052                                           const void *data)
3053 {
3054         const struct nfs41_reclaim_complete_args *args = data;
3055         struct compound_hdr hdr = {
3056                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3057         };
3058
3059         encode_compound_hdr(xdr, req, &hdr);
3060         encode_sequence(xdr, &args->seq_args, &hdr);
3061         encode_reclaim_complete(xdr, args, &hdr);
3062         encode_nops(&hdr);
3063 }
3064
3065 /*
3066  * Encode GETDEVICEINFO request
3067  */
3068 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3069                                        struct xdr_stream *xdr,
3070                                        const void *data)
3071 {
3072         const struct nfs4_getdeviceinfo_args *args = data;
3073         struct compound_hdr hdr = {
3074                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3075         };
3076         uint32_t replen;
3077
3078         encode_compound_hdr(xdr, req, &hdr);
3079         encode_sequence(xdr, &args->seq_args, &hdr);
3080
3081         replen = hdr.replen + op_decode_hdr_maxsz + 2;
3082
3083         encode_getdeviceinfo(xdr, args, &hdr);
3084
3085         /* set up reply kvec. device_addr4 opaque data is read into the
3086          * pages */
3087         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3088                                 args->pdev->pglen, replen);
3089         encode_nops(&hdr);
3090 }
3091
3092 /*
3093  *  Encode LAYOUTGET request
3094  */
3095 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3096                                    struct xdr_stream *xdr,
3097                                    const void *data)
3098 {
3099         const struct nfs4_layoutget_args *args = data;
3100         struct compound_hdr hdr = {
3101                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3102         };
3103
3104         encode_compound_hdr(xdr, req, &hdr);
3105         encode_sequence(xdr, &args->seq_args, &hdr);
3106         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3107         encode_layoutget(xdr, args, &hdr);
3108
3109         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3110                                 args->layout.pglen, hdr.replen - pagepad_maxsz);
3111         encode_nops(&hdr);
3112 }
3113
3114 /*
3115  *  Encode LAYOUTCOMMIT request
3116  */
3117 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3118                                       struct xdr_stream *xdr,
3119                                       const void *priv)
3120 {
3121         const struct nfs4_layoutcommit_args *args = priv;
3122         struct nfs4_layoutcommit_data *data =
3123                 container_of(args, struct nfs4_layoutcommit_data, args);
3124         struct compound_hdr hdr = {
3125                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3126         };
3127
3128         encode_compound_hdr(xdr, req, &hdr);
3129         encode_sequence(xdr, &args->seq_args, &hdr);
3130         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3131         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3132         encode_getfattr(xdr, args->bitmask, &hdr);
3133         encode_nops(&hdr);
3134 }
3135
3136 /*
3137  * Encode LAYOUTRETURN request
3138  */
3139 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3140                                       struct xdr_stream *xdr,
3141                                       const void *data)
3142 {
3143         const struct nfs4_layoutreturn_args *args = data;
3144         struct compound_hdr hdr = {
3145                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3146         };
3147
3148         encode_compound_hdr(xdr, req, &hdr);
3149         encode_sequence(xdr, &args->seq_args, &hdr);
3150         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3151         encode_layoutreturn(xdr, args, &hdr);
3152         encode_nops(&hdr);
3153 }
3154
3155 /*
3156  * Encode SECINFO_NO_NAME request
3157  */
3158 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3159                                         struct xdr_stream *xdr,
3160                                         const void *data)
3161 {
3162         const struct nfs41_secinfo_no_name_args *args = data;
3163         struct compound_hdr hdr = {
3164                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3165         };
3166
3167         encode_compound_hdr(xdr, req, &hdr);
3168         encode_sequence(xdr, &args->seq_args, &hdr);
3169         encode_putrootfh(xdr, &hdr);
3170         encode_secinfo_no_name(xdr, args, &hdr);
3171         encode_nops(&hdr);
3172 }
3173
3174 /*
3175  *  Encode TEST_STATEID request
3176  */
3177 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3178                                       struct xdr_stream *xdr,
3179                                       const void *data)
3180 {
3181         const struct nfs41_test_stateid_args *args = data;
3182         struct compound_hdr hdr = {
3183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3184         };
3185
3186         encode_compound_hdr(xdr, req, &hdr);
3187         encode_sequence(xdr, &args->seq_args, &hdr);
3188         encode_test_stateid(xdr, args, &hdr);
3189         encode_nops(&hdr);
3190 }
3191
3192 /*
3193  *  Encode FREE_STATEID request
3194  */
3195 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3196                                      struct xdr_stream *xdr,
3197                                      const void *data)
3198 {
3199         const struct nfs41_free_stateid_args *args = data;
3200         struct compound_hdr hdr = {
3201                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3202         };
3203
3204         encode_compound_hdr(xdr, req, &hdr);
3205         encode_sequence(xdr, &args->seq_args, &hdr);
3206         encode_free_stateid(xdr, args, &hdr);
3207         encode_nops(&hdr);
3208 }
3209 #endif /* CONFIG_NFS_V4_1 */
3210
3211 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3212 {
3213         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3214                         NFS4_OPAQUE_LIMIT);
3215         if (unlikely(ret < 0))
3216                 return -EIO;
3217         *len = ret;
3218         return 0;
3219 }
3220
3221 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3222 {
3223         ssize_t ret;
3224         void *ptr;
3225         u32 tmp;
3226
3227         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3228                 return -EIO;
3229         hdr->status = tmp;
3230
3231         ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT);
3232         if (ret < 0)
3233                 return -EIO;
3234         hdr->taglen = ret;
3235         hdr->tag = ptr;
3236
3237         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3238                 return -EIO;
3239         hdr->nops = tmp;
3240         if (unlikely(hdr->nops < 1))
3241                 return nfs4_stat_to_errno(hdr->status);
3242         return 0;
3243 }
3244
3245 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3246                 int *nfs_retval)
3247 {
3248         __be32 *p;
3249         uint32_t opnum;
3250         int32_t nfserr;
3251
3252         p = xdr_inline_decode(xdr, 8);
3253         if (unlikely(!p))
3254                 goto out_overflow;
3255         opnum = be32_to_cpup(p++);
3256         if (unlikely(opnum != expected))
3257                 goto out_bad_operation;
3258         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3259                 goto out_status;
3260         *nfs_retval = 0;
3261         return true;
3262 out_status:
3263         nfserr = be32_to_cpup(p);
3264         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3265         *nfs_retval = nfs4_stat_to_errno(nfserr);
3266         return true;
3267 out_bad_operation:
3268         trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3269         *nfs_retval = -EREMOTEIO;
3270         return false;
3271 out_overflow:
3272         *nfs_retval = -EIO;
3273         return false;
3274 }
3275
3276 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3277 {
3278         int retval;
3279
3280         __decode_op_hdr(xdr, expected, &retval);
3281         return retval;
3282 }
3283
3284 /* Dummy routine */
3285 static int decode_ace(struct xdr_stream *xdr, void *ace)
3286 {
3287         __be32 *p;
3288         unsigned int strlen;
3289         char *str;
3290
3291         p = xdr_inline_decode(xdr, 12);
3292         if (unlikely(!p))
3293                 return -EIO;
3294         return decode_opaque_inline(xdr, &strlen, &str);
3295 }
3296
3297 static ssize_t
3298 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3299 {
3300         ssize_t ret;
3301
3302         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3303         if (likely(ret >= 0))
3304                 return ret;
3305         if (ret != -EMSGSIZE)
3306                 return -EIO;
3307         return sz;
3308 }
3309
3310 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3311 {
3312         ssize_t ret;
3313         ret = decode_bitmap4(xdr, bitmap, 3);
3314         return ret < 0 ? ret : 0;
3315 }
3316
3317 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3318 {
3319         __be32 *p;
3320
3321         p = xdr_inline_decode(xdr, 4);
3322         if (unlikely(!p))
3323                 return -EIO;
3324         *attrlen = be32_to_cpup(p);
3325         *savep = xdr_stream_pos(xdr);
3326         return 0;
3327 }
3328
3329 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3330 {
3331         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3332                 int ret;
3333                 ret = decode_attr_bitmap(xdr, bitmask);
3334                 if (unlikely(ret < 0))
3335                         return ret;
3336                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3337         } else
3338                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3339         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3340                 bitmask[0], bitmask[1], bitmask[2]);
3341         return 0;
3342 }
3343
3344 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3345 {
3346         __be32 *p;
3347         int ret = 0;
3348
3349         *type = 0;
3350         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3351                 return -EIO;
3352         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3353                 p = xdr_inline_decode(xdr, 4);
3354                 if (unlikely(!p))
3355                         return -EIO;
3356                 *type = be32_to_cpup(p);
3357                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3358                         dprintk("%s: bad type %d\n", __func__, *type);
3359                         return -EIO;
3360                 }
3361                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3362                 ret = NFS_ATTR_FATTR_TYPE;
3363         }
3364         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3365         return ret;
3366 }
3367
3368 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3369                                       uint32_t *bitmap, uint32_t *type)
3370 {
3371         __be32 *p;
3372
3373         *type = 0;
3374         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3375                 return -EIO;
3376         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3377                 p = xdr_inline_decode(xdr, 4);
3378                 if (unlikely(!p))
3379                         return -EIO;
3380                 *type = be32_to_cpup(p);
3381                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3382         }
3383         dprintk("%s: expire type=0x%x\n", __func__, *type);
3384         return 0;
3385 }
3386
3387 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3388 {
3389         __be32 *p;
3390         int ret = 0;
3391
3392         *change = 0;
3393         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3394                 return -EIO;
3395         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3396                 p = xdr_inline_decode(xdr, 8);
3397                 if (unlikely(!p))
3398                         return -EIO;
3399                 xdr_decode_hyper(p, change);
3400                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3401                 ret = NFS_ATTR_FATTR_CHANGE;
3402         }
3403         dprintk("%s: change attribute=%Lu\n", __func__,
3404                         (unsigned long long)*change);
3405         return ret;
3406 }
3407
3408 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3409 {
3410         __be32 *p;
3411         int ret = 0;
3412
3413         *size = 0;
3414         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3415                 return -EIO;
3416         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3417                 p = xdr_inline_decode(xdr, 8);
3418                 if (unlikely(!p))
3419                         return -EIO;
3420                 xdr_decode_hyper(p, size);
3421                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3422                 ret = NFS_ATTR_FATTR_SIZE;
3423         }
3424         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3425         return ret;
3426 }
3427
3428 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3429 {
3430         __be32 *p;
3431
3432         *res = 0;
3433         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3434                 return -EIO;
3435         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3436                 p = xdr_inline_decode(xdr, 4);
3437                 if (unlikely(!p))
3438                         return -EIO;
3439                 *res = be32_to_cpup(p);
3440                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3441         }
3442         dprintk("%s: link support=%s\n", __func__, str_false_true(*res == 0));
3443         return 0;
3444 }
3445
3446 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3447 {
3448         __be32 *p;
3449
3450         *res = 0;
3451         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3452                 return -EIO;
3453         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3454                 p = xdr_inline_decode(xdr, 4);
3455                 if (unlikely(!p))
3456                         return -EIO;
3457                 *res = be32_to_cpup(p);
3458                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3459         }
3460         dprintk("%s: symlink support=%s\n", __func__, str_false_true(*res == 0));
3461         return 0;
3462 }
3463
3464 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3465 {
3466         __be32 *p;
3467         int ret = 0;
3468
3469         fsid->major = 0;
3470         fsid->minor = 0;
3471         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3472                 return -EIO;
3473         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3474                 p = xdr_inline_decode(xdr, 16);
3475                 if (unlikely(!p))
3476                         return -EIO;
3477                 p = xdr_decode_hyper(p, &fsid->major);
3478                 xdr_decode_hyper(p, &fsid->minor);
3479                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3480                 ret = NFS_ATTR_FATTR_FSID;
3481         }
3482         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3483                         (unsigned long long)fsid->major,
3484                         (unsigned long long)fsid->minor);
3485         return ret;
3486 }
3487
3488 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3489 {
3490         __be32 *p;
3491
3492         *res = 60;
3493         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3494                 return -EIO;
3495         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3496                 p = xdr_inline_decode(xdr, 4);
3497                 if (unlikely(!p))
3498                         return -EIO;
3499                 *res = be32_to_cpup(p);
3500                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3501         }
3502         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3503         return 0;
3504 }
3505
3506 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3507 {
3508         __be32 *p;
3509
3510         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3511                 return -EIO;
3512         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3513                 p = xdr_inline_decode(xdr, 4);
3514                 if (unlikely(!p))
3515                         return -EIO;
3516                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3517                 *res = -be32_to_cpup(p);
3518         }
3519         return 0;
3520 }
3521
3522 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3523                                  uint32_t *bitmap, uint32_t *bitmask)
3524 {
3525         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3526                 int ret;
3527                 ret = decode_attr_bitmap(xdr, bitmask);
3528                 if (unlikely(ret < 0))
3529                         return ret;
3530                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3531         } else
3532                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3533         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3534                 bitmask[0], bitmask[1], bitmask[2]);
3535         return 0;
3536 }
3537
3538 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3539 {
3540         __be32 *p;
3541         u32 len;
3542
3543         if (fh != NULL)
3544                 memset(fh, 0, sizeof(*fh));
3545
3546         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3547                 return -EIO;
3548         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3549                 p = xdr_inline_decode(xdr, 4);
3550                 if (unlikely(!p))
3551                         return -EIO;
3552                 len = be32_to_cpup(p);
3553                 if (len > NFS4_FHSIZE || len == 0) {
3554                         trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3555                                                       NFS4ERR_BADHANDLE);
3556                         return -EREMOTEIO;
3557                 }
3558                 p = xdr_inline_decode(xdr, len);
3559                 if (unlikely(!p))
3560                         return -EIO;
3561                 if (fh != NULL) {
3562                         memcpy(fh->data, p, len);
3563                         fh->size = len;
3564                 }
3565                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3566         }
3567         return 0;
3568 }
3569
3570 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3571 {
3572         __be32 *p;
3573
3574         *res = 0;
3575         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3576                 return -EIO;
3577         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3578                 p = xdr_inline_decode(xdr, 4);
3579                 if (unlikely(!p))
3580                         return -EIO;
3581                 *res = be32_to_cpup(p);
3582                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3583         }
3584         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3585         return 0;
3586 }
3587
3588 static int decode_attr_case_insensitive(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3589 {
3590         __be32 *p;
3591
3592         *res = 0;
3593         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_INSENSITIVE - 1U)))
3594                 return -EIO;
3595         if (likely(bitmap[0] & FATTR4_WORD0_CASE_INSENSITIVE)) {
3596                 p = xdr_inline_decode(xdr, 4);
3597                 if (unlikely(!p))
3598                         return -EIO;
3599                 *res = be32_to_cpup(p);
3600                 bitmap[0] &= ~FATTR4_WORD0_CASE_INSENSITIVE;
3601         }
3602         dprintk("%s: case_insensitive=%s\n", __func__, str_false_true(*res == 0));
3603         return 0;
3604 }
3605
3606 static int decode_attr_case_preserving(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3607 {
3608         __be32 *p;
3609
3610         *res = 0;
3611         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_PRESERVING - 1U)))
3612                 return -EIO;
3613         if (likely(bitmap[0] & FATTR4_WORD0_CASE_PRESERVING)) {
3614                 p = xdr_inline_decode(xdr, 4);
3615                 if (unlikely(!p))
3616                         return -EIO;
3617                 *res = be32_to_cpup(p);
3618                 bitmap[0] &= ~FATTR4_WORD0_CASE_PRESERVING;
3619         }
3620         dprintk("%s: case_preserving=%s\n", __func__, str_false_true(*res == 0));
3621         return 0;
3622 }
3623
3624 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3625 {
3626         __be32 *p;
3627         int ret = 0;
3628
3629         *fileid = 0;
3630         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3631                 return -EIO;
3632         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3633                 p = xdr_inline_decode(xdr, 8);
3634                 if (unlikely(!p))
3635                         return -EIO;
3636                 xdr_decode_hyper(p, fileid);
3637                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3638                 ret = NFS_ATTR_FATTR_FILEID;
3639         }
3640         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3641         return ret;
3642 }
3643
3644 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3645 {
3646         __be32 *p;
3647         int ret = 0;
3648
3649         *fileid = 0;
3650         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3651                 return -EIO;
3652         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3653                 p = xdr_inline_decode(xdr, 8);
3654                 if (unlikely(!p))
3655                         return -EIO;
3656                 xdr_decode_hyper(p, fileid);
3657                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3658                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3659         }
3660         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3661         return ret;
3662 }
3663
3664 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3665 {
3666         __be32 *p;
3667         int status = 0;
3668
3669         *res = 0;
3670         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3671                 return -EIO;
3672         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3673                 p = xdr_inline_decode(xdr, 8);
3674                 if (unlikely(!p))
3675                         return -EIO;
3676                 xdr_decode_hyper(p, res);
3677                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3678         }
3679         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3680         return status;
3681 }
3682
3683 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3684 {
3685         __be32 *p;
3686         int status = 0;
3687
3688         *res = 0;
3689         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3690                 return -EIO;
3691         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3692                 p = xdr_inline_decode(xdr, 8);
3693                 if (unlikely(!p))
3694                         return -EIO;
3695                 xdr_decode_hyper(p, res);
3696                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3697         }
3698         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3699         return status;
3700 }
3701
3702 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3703 {
3704         __be32 *p;
3705         int status = 0;
3706
3707         *res = 0;
3708         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3709                 return -EIO;
3710         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3711                 p = xdr_inline_decode(xdr, 8);
3712                 if (unlikely(!p))
3713                         return -EIO;
3714                 xdr_decode_hyper(p, res);
3715                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3716         }
3717         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3718         return status;
3719 }
3720
3721 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3722 {
3723         u32 n;
3724         __be32 *p;
3725         int status = 0;
3726
3727         p = xdr_inline_decode(xdr, 4);
3728         if (unlikely(!p))
3729                 return -EIO;
3730         n = be32_to_cpup(p);
3731         if (n == 0)
3732                 goto root_path;
3733         dprintk("pathname4: ");
3734         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3735                 dprintk("cannot parse %d components in path\n", n);
3736                 goto out_eio;
3737         }
3738         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3739                 struct nfs4_string *component = &path->components[path->ncomponents];
3740                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3741                 if (unlikely(status != 0))
3742                         goto out_eio;
3743                 ifdebug (XDR)
3744                         pr_cont("%s%.*s ",
3745                                 (path->ncomponents != n ? "/ " : ""),
3746                                 component->len, component->data);
3747         }
3748 out:
3749         return status;
3750 root_path:
3751 /* a root pathname is sent as a zero component4 */
3752         path->ncomponents = 1;
3753         path->components[0].len=0;
3754         path->components[0].data=NULL;
3755         dprintk("pathname4: /\n");
3756         goto out;
3757 out_eio:
3758         dprintk(" status %d", status);
3759         status = -EIO;
3760         goto out;
3761 }
3762
3763 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3764 {
3765         int n;
3766         __be32 *p;
3767         int status = -EIO;
3768
3769         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3770                 goto out;
3771         status = 0;
3772         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3773                 goto out;
3774         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3775         status = -EIO;
3776         /* Ignore borken servers that return unrequested attrs */
3777         if (unlikely(res == NULL))
3778                 goto out;
3779         dprintk("%s: fsroot:\n", __func__);
3780         status = decode_pathname(xdr, &res->fs_path);
3781         if (unlikely(status != 0))
3782                 goto out;
3783         p = xdr_inline_decode(xdr, 4);
3784         if (unlikely(!p))
3785                 goto out_eio;
3786         n = be32_to_cpup(p);
3787         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3788                 u32 m;
3789                 struct nfs4_fs_location *loc;
3790
3791                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3792                         break;
3793                 loc = &res->locations[res->nlocations];
3794                 p = xdr_inline_decode(xdr, 4);
3795                 if (unlikely(!p))
3796                         goto out_eio;
3797                 m = be32_to_cpup(p);
3798
3799                 dprintk("%s: servers:\n", __func__);
3800                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3801                         struct nfs4_string *server;
3802
3803                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3804                                 unsigned int i;
3805                                 dprintk("%s: using first %u of %u servers "
3806                                         "returned for location %u\n",
3807                                                 __func__,
3808                                                 NFS4_FS_LOCATION_MAXSERVERS,
3809                                                 m, res->nlocations);
3810                                 for (i = loc->nservers; i < m; i++) {
3811                                         unsigned int len;
3812                                         char *data;
3813                                         status = decode_opaque_inline(xdr, &len, &data);
3814                                         if (unlikely(status != 0))
3815                                                 goto out_eio;
3816                                 }
3817                                 break;
3818                         }
3819                         server = &loc->servers[loc->nservers];
3820                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3821                         if (unlikely(status != 0))
3822                                 goto out_eio;
3823                         dprintk("%s ", server->data);
3824                 }
3825                 status = decode_pathname(xdr, &loc->rootpath);
3826                 if (unlikely(status != 0))
3827                         goto out_eio;
3828         }
3829         if (res->nlocations != 0)
3830                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3831 out:
3832         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3833         return status;
3834 out_eio:
3835         status = -EIO;
3836         goto out;
3837 }
3838
3839 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3840 {
3841         __be32 *p;
3842         int status = 0;
3843
3844         *res = 0;
3845         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3846                 return -EIO;
3847         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3848                 p = xdr_inline_decode(xdr, 8);
3849                 if (unlikely(!p))
3850                         return -EIO;
3851                 xdr_decode_hyper(p, res);
3852                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3853         }
3854         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3855         return status;
3856 }
3857
3858 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3859 {
3860         __be32 *p;
3861         int status = 0;
3862
3863         *maxlink = 1;
3864         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3865                 return -EIO;
3866         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3867                 p = xdr_inline_decode(xdr, 4);
3868                 if (unlikely(!p))
3869                         return -EIO;
3870                 *maxlink = be32_to_cpup(p);
3871                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3872         }
3873         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3874         return status;
3875 }
3876
3877 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3878 {
3879         __be32 *p;
3880         int status = 0;
3881
3882         *maxname = 1024;
3883         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3884                 return -EIO;
3885         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3886                 p = xdr_inline_decode(xdr, 4);
3887                 if (unlikely(!p))
3888                         return -EIO;
3889                 *maxname = be32_to_cpup(p);
3890                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3891         }
3892         dprintk("%s: maxname=%u\n", __func__, *maxname);
3893         return status;
3894 }
3895
3896 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3897 {
3898         __be32 *p;
3899         int status = 0;
3900
3901         *res = 1024;
3902         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3903                 return -EIO;
3904         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3905                 uint64_t maxread;
3906                 p = xdr_inline_decode(xdr, 8);
3907                 if (unlikely(!p))
3908                         return -EIO;
3909                 xdr_decode_hyper(p, &maxread);
3910                 if (maxread > 0x7FFFFFFF)
3911                         maxread = 0x7FFFFFFF;
3912                 *res = (uint32_t)maxread;
3913                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3914         }
3915         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3916         return status;
3917 }
3918
3919 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3920 {
3921         __be32 *p;
3922         int status = 0;
3923
3924         *res = 1024;
3925         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3926                 return -EIO;
3927         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3928                 uint64_t maxwrite;
3929                 p = xdr_inline_decode(xdr, 8);
3930                 if (unlikely(!p))
3931                         return -EIO;
3932                 xdr_decode_hyper(p, &maxwrite);
3933                 if (maxwrite > 0x7FFFFFFF)
3934                         maxwrite = 0x7FFFFFFF;
3935                 *res = (uint32_t)maxwrite;
3936                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3937         }
3938         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3939         return status;
3940 }
3941
3942 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3943 {
3944         uint32_t tmp;
3945         __be32 *p;
3946         int ret = 0;
3947
3948         *mode = 0;
3949         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3950                 return -EIO;
3951         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3952                 p = xdr_inline_decode(xdr, 4);
3953                 if (unlikely(!p))
3954                         return -EIO;
3955                 tmp = be32_to_cpup(p);
3956                 *mode = tmp & ~S_IFMT;
3957                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3958                 ret = NFS_ATTR_FATTR_MODE;
3959         }
3960         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3961         return ret;
3962 }
3963
3964 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3965 {
3966         __be32 *p;
3967         int ret = 0;
3968
3969         *nlink = 1;
3970         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3971                 return -EIO;
3972         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3973                 p = xdr_inline_decode(xdr, 4);
3974                 if (unlikely(!p))
3975                         return -EIO;
3976                 *nlink = be32_to_cpup(p);
3977                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3978                 ret = NFS_ATTR_FATTR_NLINK;
3979         }
3980         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3981         return ret;
3982 }
3983
3984 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3985                 struct nfs4_string *name, gfp_t gfp_flags)
3986 {
3987         ssize_t ret;
3988
3989         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3990                         XDR_MAX_NETOBJ, gfp_flags);
3991         name->len = 0;
3992         if (ret > 0)
3993                 name->len = ret;
3994         return ret;
3995 }
3996
3997 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3998                 const struct nfs_server *server, kuid_t *uid,
3999                 struct nfs4_string *owner_name)
4000 {
4001         ssize_t len;
4002         char *p;
4003
4004         *uid = make_kuid(&init_user_ns, -2);
4005         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
4006                 return -EIO;
4007         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
4008                 return 0;
4009         bitmap[1] &= ~FATTR4_WORD1_OWNER;
4010
4011         if (owner_name != NULL) {
4012                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
4013                 if (len <= 0)
4014                         goto out;
4015                 dprintk("%s: name=%s\n", __func__, owner_name->data);
4016                 return NFS_ATTR_FATTR_OWNER_NAME;
4017         } else {
4018                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4019                                 XDR_MAX_NETOBJ);
4020                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
4021                         goto out;
4022                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
4023                 return NFS_ATTR_FATTR_OWNER;
4024         }
4025 out:
4026         if (len == -EBADMSG)
4027                 return -EIO;
4028         return 0;
4029 }
4030
4031 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4032                 const struct nfs_server *server, kgid_t *gid,
4033                 struct nfs4_string *group_name)
4034 {
4035         ssize_t len;
4036         char *p;
4037
4038         *gid = make_kgid(&init_user_ns, -2);
4039         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4040                 return -EIO;
4041         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4042                 return 0;
4043         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4044
4045         if (group_name != NULL) {
4046                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4047                 if (len <= 0)
4048                         goto out;
4049                 dprintk("%s: name=%s\n", __func__, group_name->data);
4050                 return NFS_ATTR_FATTR_GROUP_NAME;
4051         } else {
4052                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4053                                 XDR_MAX_NETOBJ);
4054                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4055                         goto out;
4056                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4057                 return NFS_ATTR_FATTR_GROUP;
4058         }
4059 out:
4060         if (len == -EBADMSG)
4061                 return -EIO;
4062         return 0;
4063 }
4064
4065 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4066 {
4067         uint32_t major = 0, minor = 0;
4068         __be32 *p;
4069         int ret = 0;
4070
4071         *rdev = MKDEV(0,0);
4072         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4073                 return -EIO;
4074         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4075                 dev_t tmp;
4076
4077                 p = xdr_inline_decode(xdr, 8);
4078                 if (unlikely(!p))
4079                         return -EIO;
4080                 major = be32_to_cpup(p++);
4081                 minor = be32_to_cpup(p);
4082                 tmp = MKDEV(major, minor);
4083                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4084                         *rdev = tmp;
4085                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4086                 ret = NFS_ATTR_FATTR_RDEV;
4087         }
4088         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4089         return ret;
4090 }
4091
4092 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4093 {
4094         __be32 *p;
4095         int status = 0;
4096
4097         *res = 0;
4098         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4099                 return -EIO;
4100         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4101                 p = xdr_inline_decode(xdr, 8);
4102                 if (unlikely(!p))
4103                         return -EIO;
4104                 xdr_decode_hyper(p, res);
4105                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4106         }
4107         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4108         return status;
4109 }
4110
4111 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4112 {
4113         __be32 *p;
4114         int status = 0;
4115
4116         *res = 0;
4117         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4118                 return -EIO;
4119         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4120                 p = xdr_inline_decode(xdr, 8);
4121                 if (unlikely(!p))
4122                         return -EIO;
4123                 xdr_decode_hyper(p, res);
4124                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4125         }
4126         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4127         return status;
4128 }
4129
4130 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4131 {
4132         __be32 *p;
4133         int status = 0;
4134
4135         *res = 0;
4136         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4137                 return -EIO;
4138         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4139                 p = xdr_inline_decode(xdr, 8);
4140                 if (unlikely(!p))
4141                         return -EIO;
4142                 xdr_decode_hyper(p, res);
4143                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4144         }
4145         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4146         return status;
4147 }
4148
4149 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4150 {
4151         __be32 *p;
4152         int ret = 0;
4153
4154         *used = 0;
4155         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4156                 return -EIO;
4157         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4158                 p = xdr_inline_decode(xdr, 8);
4159                 if (unlikely(!p))
4160                         return -EIO;
4161                 xdr_decode_hyper(p, used);
4162                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4163                 ret = NFS_ATTR_FATTR_SPACE_USED;
4164         }
4165         dprintk("%s: space used=%Lu\n", __func__,
4166                         (unsigned long long)*used);
4167         return ret;
4168 }
4169
4170 static __be32 *
4171 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4172 {
4173         __u64 sec;
4174
4175         p = xdr_decode_hyper(p, &sec);
4176         t-> tv_sec = sec;
4177         t->tv_nsec = be32_to_cpup(p++);
4178         return p;
4179 }
4180
4181 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4182 {
4183         __be32 *p;
4184
4185         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4186         if (unlikely(!p))
4187                 return -EIO;
4188         xdr_decode_nfstime4(p, time);
4189         return 0;
4190 }
4191
4192 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4193 {
4194         int status = 0;
4195
4196         time->tv_sec = 0;
4197         time->tv_nsec = 0;
4198         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4199                 return -EIO;
4200         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4201                 status = decode_attr_time(xdr, time);
4202                 if (status == 0)
4203                         status = NFS_ATTR_FATTR_ATIME;
4204                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4205         }
4206         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4207         return status;
4208 }
4209
4210 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4211 {
4212         int status = 0;
4213
4214         time->tv_sec = 0;
4215         time->tv_nsec = 0;
4216         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4217                 return -EIO;
4218         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4219                 status = decode_attr_time(xdr, time);
4220                 if (status == 0)
4221                         status = NFS_ATTR_FATTR_CTIME;
4222                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4223         }
4224         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4225         return status;
4226 }
4227
4228 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4229                                   struct timespec64 *time)
4230 {
4231         int status = 0;
4232
4233         time->tv_sec = 0;
4234         time->tv_nsec = 0;
4235         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4236                 return -EIO;
4237         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4238                 status = decode_attr_time(xdr, time);
4239                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4240         }
4241         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4242                 time->tv_nsec);
4243         return status;
4244 }
4245
4246 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4247                                         struct nfs4_label *label)
4248 {
4249         uint32_t pi = 0;
4250         uint32_t lfs = 0;
4251         __u32 len;
4252         __be32 *p;
4253         int status = 0;
4254
4255         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4256                 return -EIO;
4257         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4258                 p = xdr_inline_decode(xdr, 4);
4259                 if (unlikely(!p))
4260                         return -EIO;
4261                 lfs = be32_to_cpup(p++);
4262                 p = xdr_inline_decode(xdr, 4);
4263                 if (unlikely(!p))
4264                         return -EIO;
4265                 pi = be32_to_cpup(p++);
4266                 p = xdr_inline_decode(xdr, 4);
4267                 if (unlikely(!p))
4268                         return -EIO;
4269                 len = be32_to_cpup(p++);
4270                 p = xdr_inline_decode(xdr, len);
4271                 if (unlikely(!p))
4272                         return -EIO;
4273                 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4274                 if (len < NFS4_MAXLABELLEN) {
4275                         if (label && label->len) {
4276                                 if (label->len < len)
4277                                         return -ERANGE;
4278                                 memcpy(label->label, p, len);
4279                                 label->len = len;
4280                                 label->pi = pi;
4281                                 label->lfs = lfs;
4282                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4283                         }
4284                 } else
4285                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4286                                         __func__, len);
4287                 if (label && label->label)
4288                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4289                                 __func__, label->len, (char *)label->label,
4290                                 label->len, label->pi, label->lfs);
4291         }
4292         return status;
4293 }
4294
4295 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4296 {
4297         int status = 0;
4298
4299         time->tv_sec = 0;
4300         time->tv_nsec = 0;
4301         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4302                 return -EIO;
4303         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4304                 status = decode_attr_time(xdr, time);
4305                 if (status == 0)
4306                         status = NFS_ATTR_FATTR_MTIME;
4307                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4308         }
4309         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4310         return status;
4311 }
4312
4313 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4314                                     uint32_t *res)
4315 {
4316         __be32 *p;
4317
4318         *res = 0;
4319         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4320                 return -EIO;
4321         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4322                 p = xdr_inline_decode(xdr, 4);
4323                 if (unlikely(!p))
4324                         return -EIO;
4325                 *res = be32_to_cpup(p);
4326                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4327         }
4328         dprintk("%s: XATTR support=%s\n", __func__, str_false_true(*res == 0));
4329         return 0;
4330 }
4331
4332 static int decode_attr_open_arguments(struct xdr_stream *xdr, uint32_t *bitmap,
4333                 struct nfs4_open_caps *res)
4334 {
4335         memset(res, 0, sizeof(*res));
4336         if (unlikely(bitmap[2] & (FATTR4_WORD2_OPEN_ARGUMENTS - 1U)))
4337                 return -EIO;
4338         if (likely(bitmap[2] & FATTR4_WORD2_OPEN_ARGUMENTS)) {
4339                 if (decode_bitmap4(xdr, res->oa_share_access, ARRAY_SIZE(res->oa_share_access)) < 0)
4340                         return -EIO;
4341                 if (decode_bitmap4(xdr, res->oa_share_deny, ARRAY_SIZE(res->oa_share_deny)) < 0)
4342                         return -EIO;
4343                 if (decode_bitmap4(xdr, res->oa_share_access_want, ARRAY_SIZE(res->oa_share_access_want)) < 0)
4344                         return -EIO;
4345                 if (decode_bitmap4(xdr, res->oa_open_claim, ARRAY_SIZE(res->oa_open_claim)) < 0)
4346                         return -EIO;
4347                 if (decode_bitmap4(xdr, res->oa_createmode, ARRAY_SIZE(res->oa_createmode)) < 0)
4348                         return -EIO;
4349                 bitmap[2] &= ~FATTR4_WORD2_OPEN_ARGUMENTS;
4350         }
4351         return 0;
4352 }
4353
4354 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4355 {
4356         unsigned int attrwords = XDR_QUADLEN(attrlen);
4357         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4358
4359         if (unlikely(attrwords != nwords)) {
4360                 dprintk("%s: server returned incorrect attribute length: "
4361                         "%u %c %u\n",
4362                                 __func__,
4363                                 attrwords << 2,
4364                                 (attrwords < nwords) ? '<' : '>',
4365                                 nwords << 2);
4366                 return -EIO;
4367         }
4368         return 0;
4369 }
4370
4371 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4372 {
4373         __be32 *p;
4374
4375         p = xdr_inline_decode(xdr, 20);
4376         if (unlikely(!p))
4377                 return -EIO;
4378         cinfo->atomic = be32_to_cpup(p++);
4379         p = xdr_decode_hyper(p, &cinfo->before);
4380         xdr_decode_hyper(p, &cinfo->after);
4381         return 0;
4382 }
4383
4384 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4385 {
4386         __be32 *p;
4387         uint32_t supp, acc;
4388         int status;
4389
4390         status = decode_op_hdr(xdr, OP_ACCESS);
4391         if (status)
4392                 return status;
4393         p = xdr_inline_decode(xdr, 8);
4394         if (unlikely(!p))
4395                 return -EIO;
4396         supp = be32_to_cpup(p++);
4397         acc = be32_to_cpup(p);
4398         *supported = supp;
4399         *access = acc;
4400         return 0;
4401 }
4402
4403 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4404 {
4405         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4406 }
4407
4408 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4409 {
4410         stateid->type = NFS4_OPEN_STATEID_TYPE;
4411         return decode_stateid(xdr, stateid);
4412 }
4413
4414 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4415 {
4416         stateid->type = NFS4_LOCK_STATEID_TYPE;
4417         return decode_stateid(xdr, stateid);
4418 }
4419
4420 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4421 {
4422         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4423         return decode_stateid(xdr, stateid);
4424 }
4425
4426 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4427 {
4428         nfs4_stateid dummy;
4429
4430         nfs4_stateid_copy(stateid, &invalid_stateid);
4431         return decode_stateid(xdr, &dummy);
4432 }
4433
4434 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4435 {
4436         int status;
4437
4438         status = decode_op_hdr(xdr, OP_CLOSE);
4439         if (status != -EIO)
4440                 nfs_increment_open_seqid(status, res->seqid);
4441         if (!status)
4442                 status = decode_invalid_stateid(xdr, &res->stateid);
4443         return status;
4444 }
4445
4446 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4447 {
4448         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4449 }
4450
4451 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4452 {
4453         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4454 }
4455
4456 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4457 {
4458         struct nfs_writeverf *verf = res->verf;
4459         int status;
4460
4461         status = decode_op_hdr(xdr, OP_COMMIT);
4462         if (!status)
4463                 status = decode_write_verifier(xdr, &verf->verifier);
4464         if (!status)
4465                 verf->committed = NFS_FILE_SYNC;
4466         return status;
4467 }
4468
4469 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4470 {
4471         __be32 *p;
4472         uint32_t bmlen;
4473         int status;
4474
4475         status = decode_op_hdr(xdr, OP_CREATE);
4476         if (status)
4477                 return status;
4478         if ((status = decode_change_info(xdr, cinfo)))
4479                 return status;
4480         p = xdr_inline_decode(xdr, 4);
4481         if (unlikely(!p))
4482                 return -EIO;
4483         bmlen = be32_to_cpup(p);
4484         p = xdr_inline_decode(xdr, bmlen << 2);
4485         if (likely(p))
4486                 return 0;
4487         return -EIO;
4488 }
4489
4490 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4491 {
4492         unsigned int savep;
4493         uint32_t attrlen, bitmap[3] = {0};
4494         int status;
4495
4496         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4497                 goto xdr_error;
4498         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4499                 goto xdr_error;
4500         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4501                 goto xdr_error;
4502         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4503                 goto xdr_error;
4504         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4505                                                  &res->fh_expire_type)) != 0)
4506                 goto xdr_error;
4507         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4508                 goto xdr_error;
4509         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4510                 goto xdr_error;
4511         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4512                 goto xdr_error;
4513         if ((status = decode_attr_case_insensitive(xdr, bitmap, &res->case_insensitive)) != 0)
4514                 goto xdr_error;
4515         if ((status = decode_attr_case_preserving(xdr, bitmap, &res->case_preserving)) != 0)
4516                 goto xdr_error;
4517         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4518                                 res->exclcreat_bitmask)) != 0)
4519                 goto xdr_error;
4520         if ((status = decode_attr_open_arguments(xdr, bitmap, &res->open_caps)) != 0)
4521                 goto xdr_error;
4522         status = verify_attr_len(xdr, savep, attrlen);
4523 xdr_error:
4524         dprintk("%s: xdr returned %d!\n", __func__, -status);
4525         return status;
4526 }
4527
4528 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4529 {
4530         unsigned int savep;
4531         uint32_t attrlen, bitmap[3] = {0};
4532         int status;
4533
4534         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4535                 goto xdr_error;
4536         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4537                 goto xdr_error;
4538         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4539                 goto xdr_error;
4540
4541         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4542                 goto xdr_error;
4543         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4544                 goto xdr_error;
4545         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4546                 goto xdr_error;
4547
4548         status = -EIO;
4549         if (unlikely(bitmap[0]))
4550                 goto xdr_error;
4551
4552         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4553                 goto xdr_error;
4554         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4555                 goto xdr_error;
4556         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4557                 goto xdr_error;
4558
4559         status = verify_attr_len(xdr, savep, attrlen);
4560 xdr_error:
4561         dprintk("%s: xdr returned %d!\n", __func__, -status);
4562         return status;
4563 }
4564
4565 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4566 {
4567         unsigned int savep;
4568         uint32_t attrlen, bitmap[3] = {0};
4569         int status;
4570
4571         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4572                 goto xdr_error;
4573         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4574                 goto xdr_error;
4575         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4576                 goto xdr_error;
4577
4578         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4579                 goto xdr_error;
4580         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4581                 goto xdr_error;
4582
4583         status = verify_attr_len(xdr, savep, attrlen);
4584 xdr_error:
4585         dprintk("%s: xdr returned %d!\n", __func__, -status);
4586         return status;
4587 }
4588
4589 static int decode_threshold_hint(struct xdr_stream *xdr,
4590                                   uint32_t *bitmap,
4591                                   uint64_t *res,
4592                                   uint32_t hint_bit)
4593 {
4594         __be32 *p;
4595
4596         *res = 0;
4597         if (likely(bitmap[0] & hint_bit)) {
4598                 p = xdr_inline_decode(xdr, 8);
4599                 if (unlikely(!p))
4600                         return -EIO;
4601                 xdr_decode_hyper(p, res);
4602         }
4603         return 0;
4604 }
4605
4606 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4607                                         struct nfs4_threshold *res)
4608 {
4609         __be32 *p;
4610         unsigned int savep;
4611         uint32_t bitmap[3] = {0,}, attrlen;
4612         int status;
4613
4614         /* layout type */
4615         p = xdr_inline_decode(xdr, 4);
4616         if (unlikely(!p))
4617                 return -EIO;
4618         res->l_type = be32_to_cpup(p);
4619
4620         /* thi_hintset bitmap */
4621         status = decode_attr_bitmap(xdr, bitmap);
4622         if (status < 0)
4623                 goto xdr_error;
4624
4625         /* thi_hintlist length */
4626         status = decode_attr_length(xdr, &attrlen, &savep);
4627         if (status < 0)
4628                 goto xdr_error;
4629         /* thi_hintlist */
4630         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4631         if (status < 0)
4632                 goto xdr_error;
4633         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4634         if (status < 0)
4635                 goto xdr_error;
4636         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4637                                        THRESHOLD_RD_IO);
4638         if (status < 0)
4639                 goto xdr_error;
4640         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4641                                        THRESHOLD_WR_IO);
4642         if (status < 0)
4643                 goto xdr_error;
4644
4645         status = verify_attr_len(xdr, savep, attrlen);
4646         res->bm = bitmap[0];
4647
4648         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4649                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4650                 res->wr_io_sz);
4651 xdr_error:
4652         dprintk("%s ret=%d!\n", __func__, status);
4653         return status;
4654 }
4655
4656 /*
4657  * Thresholds on pNFS direct I/O vrs MDS I/O
4658  */
4659 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4660                                     uint32_t *bitmap,
4661                                     struct nfs4_threshold *res)
4662 {
4663         __be32 *p;
4664         int status = 0;
4665         uint32_t num;
4666
4667         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4668                 return -EIO;
4669         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4670                 /* Did the server return an unrequested attribute? */
4671                 if (unlikely(res == NULL))
4672                         return -EREMOTEIO;
4673                 p = xdr_inline_decode(xdr, 4);
4674                 if (unlikely(!p))
4675                         return -EIO;
4676                 num = be32_to_cpup(p);
4677                 if (num == 0)
4678                         return 0;
4679                 if (num > 1)
4680                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4681                                 "drivers per filesystem not supported\n",
4682                                 __func__);
4683
4684                 status = decode_first_threshold_item4(xdr, res);
4685                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4686         }
4687         return status;
4688 }
4689
4690 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4691                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4692                 struct nfs4_fs_locations *fs_loc, const struct nfs_server *server)
4693 {
4694         int status;
4695         umode_t fmode = 0;
4696         uint32_t type;
4697         int32_t err;
4698
4699         status = decode_attr_type(xdr, bitmap, &type);
4700         if (status < 0)
4701                 goto xdr_error;
4702         fattr->mode = 0;
4703         if (status != 0) {
4704                 fattr->mode |= nfs_type2fmt[type];
4705                 fattr->valid |= status;
4706         }
4707
4708         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4709         if (status < 0)
4710                 goto xdr_error;
4711         fattr->valid |= status;
4712
4713         status = decode_attr_size(xdr, bitmap, &fattr->size);
4714         if (status < 0)
4715                 goto xdr_error;
4716         fattr->valid |= status;
4717
4718         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4719         if (status < 0)
4720                 goto xdr_error;
4721         fattr->valid |= status;
4722
4723         err = 0;
4724         status = decode_attr_error(xdr, bitmap, &err);
4725         if (status < 0)
4726                 goto xdr_error;
4727
4728         status = decode_attr_filehandle(xdr, bitmap, fh);
4729         if (status < 0)
4730                 goto xdr_error;
4731
4732         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4733         if (status < 0)
4734                 goto xdr_error;
4735         fattr->valid |= status;
4736
4737         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4738         if (status < 0)
4739                 goto xdr_error;
4740         fattr->valid |= status;
4741
4742         status = -EIO;
4743         if (unlikely(bitmap[0]))
4744                 goto xdr_error;
4745
4746         status = decode_attr_mode(xdr, bitmap, &fmode);
4747         if (status < 0)
4748                 goto xdr_error;
4749         if (status != 0) {
4750                 fattr->mode |= fmode;
4751                 fattr->valid |= status;
4752         }
4753
4754         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4755         if (status < 0)
4756                 goto xdr_error;
4757         fattr->valid |= status;
4758
4759         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4760         if (status < 0)
4761                 goto xdr_error;
4762         fattr->valid |= status;
4763
4764         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4765         if (status < 0)
4766                 goto xdr_error;
4767         fattr->valid |= status;
4768
4769         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4770         if (status < 0)
4771                 goto xdr_error;
4772         fattr->valid |= status;
4773
4774         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4775         if (status < 0)
4776                 goto xdr_error;
4777         fattr->valid |= status;
4778
4779         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4780         if (status < 0)
4781                 goto xdr_error;
4782         fattr->valid |= status;
4783
4784         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4785         if (status < 0)
4786                 goto xdr_error;
4787         fattr->valid |= status;
4788
4789         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4790         if (status < 0)
4791                 goto xdr_error;
4792         fattr->valid |= status;
4793
4794         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4795         if (status < 0)
4796                 goto xdr_error;
4797         fattr->valid |= status;
4798
4799         status = -EIO;
4800         if (unlikely(bitmap[1]))
4801                 goto xdr_error;
4802
4803         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4804         if (status < 0)
4805                 goto xdr_error;
4806
4807         status = decode_attr_security_label(xdr, bitmap, fattr->label);
4808         if (status < 0)
4809                 goto xdr_error;
4810         fattr->valid |= status;
4811
4812 xdr_error:
4813         dprintk("%s: xdr returned %d\n", __func__, -status);
4814         return status;
4815 }
4816
4817 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4818                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4819                 const struct nfs_server *server)
4820 {
4821         unsigned int savep;
4822         uint32_t attrlen,
4823                  bitmap[3] = {0};
4824         int status;
4825
4826         status = decode_op_hdr(xdr, OP_GETATTR);
4827         if (status < 0)
4828                 goto xdr_error;
4829
4830         status = decode_attr_bitmap(xdr, bitmap);
4831         if (status < 0)
4832                 goto xdr_error;
4833
4834         status = decode_attr_length(xdr, &attrlen, &savep);
4835         if (status < 0)
4836                 goto xdr_error;
4837
4838         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4839         if (status < 0)
4840                 goto xdr_error;
4841
4842         status = verify_attr_len(xdr, savep, attrlen);
4843 xdr_error:
4844         dprintk("%s: xdr returned %d\n", __func__, -status);
4845         return status;
4846 }
4847
4848 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4849                 const struct nfs_server *server)
4850 {
4851         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4852 }
4853
4854 /*
4855  * Decode potentially multiple layout types.
4856  */
4857 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4858                                     struct nfs_fsinfo *fsinfo)
4859 {
4860         __be32 *p;
4861         uint32_t i;
4862
4863         p = xdr_inline_decode(xdr, 4);
4864         if (unlikely(!p))
4865                 return -EIO;
4866         fsinfo->nlayouttypes = be32_to_cpup(p);
4867
4868         /* pNFS is not supported by the underlying file system */
4869         if (fsinfo->nlayouttypes == 0)
4870                 return 0;
4871
4872         /* Decode and set first layout type, move xdr->p past unused types */
4873         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4874         if (unlikely(!p))
4875                 return -EIO;
4876
4877         /* If we get too many, then just cap it at the max */
4878         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4879                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4880                         __func__, fsinfo->nlayouttypes);
4881                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4882         }
4883
4884         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4885                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4886         return 0;
4887 }
4888
4889 /*
4890  * The type of file system exported.
4891  * Note we must ensure that layouttype is set in any non-error case.
4892  */
4893 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4894                                 struct nfs_fsinfo *fsinfo)
4895 {
4896         int status = 0;
4897
4898         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4899         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4900                 return -EIO;
4901         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4902                 status = decode_pnfs_layout_types(xdr, fsinfo);
4903                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4904         }
4905         return status;
4906 }
4907
4908 /*
4909  * The prefered block size for layout directed io
4910  */
4911 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4912                                       uint32_t *res)
4913 {
4914         __be32 *p;
4915
4916         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4917         *res = 0;
4918         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4919                 p = xdr_inline_decode(xdr, 4);
4920                 if (unlikely(!p))
4921                         return -EIO;
4922                 *res = be32_to_cpup(p);
4923                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4924         }
4925         return 0;
4926 }
4927
4928 /*
4929  * The granularity of a CLONE operation.
4930  */
4931 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4932                                      uint32_t *res)
4933 {
4934         __be32 *p;
4935
4936         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4937         *res = 0;
4938         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4939                 p = xdr_inline_decode(xdr, 4);
4940                 if (unlikely(!p))
4941                         return -EIO;
4942                 *res = be32_to_cpup(p);
4943                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4944         }
4945         return 0;
4946 }
4947
4948 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4949                                         uint32_t *bitmap,
4950                                         enum nfs4_change_attr_type *res)
4951 {
4952         u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4953
4954         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4955         if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4956                 if (xdr_stream_decode_u32(xdr, &tmp))
4957                         return -EIO;
4958                 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4959         }
4960
4961         switch(tmp) {
4962         case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4963         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4964         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4965         case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4966                 *res = tmp;
4967                 break;
4968         default:
4969                 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4970         }
4971         return 0;
4972 }
4973
4974 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4975 {
4976         unsigned int savep;
4977         uint32_t attrlen, bitmap[3];
4978         int status;
4979
4980         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4981                 goto xdr_error;
4982         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4983                 goto xdr_error;
4984         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4985                 goto xdr_error;
4986
4987         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4988
4989         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4990                 goto xdr_error;
4991         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4992                 goto xdr_error;
4993         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4994                 goto xdr_error;
4995         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4996         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4997                 goto xdr_error;
4998         fsinfo->wtpref = fsinfo->wtmax;
4999
5000         status = -EIO;
5001         if (unlikely(bitmap[0]))
5002                 goto xdr_error;
5003
5004         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
5005         if (status != 0)
5006                 goto xdr_error;
5007         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
5008         if (status != 0)
5009                 goto xdr_error;
5010
5011         status = -EIO;
5012         if (unlikely(bitmap[1]))
5013                 goto xdr_error;
5014
5015         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
5016         if (status)
5017                 goto xdr_error;
5018         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
5019         if (status)
5020                 goto xdr_error;
5021
5022         status = decode_attr_change_attr_type(xdr, bitmap,
5023                                               &fsinfo->change_attr_type);
5024         if (status)
5025                 goto xdr_error;
5026
5027         status = decode_attr_xattrsupport(xdr, bitmap,
5028                                           &fsinfo->xattr_support);
5029         if (status)
5030                 goto xdr_error;
5031
5032         status = verify_attr_len(xdr, savep, attrlen);
5033 xdr_error:
5034         dprintk("%s: xdr returned %d!\n", __func__, -status);
5035         return status;
5036 }
5037
5038 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
5039 {
5040         __be32 *p;
5041         uint32_t len;
5042         int status;
5043
5044         /* Zero handle first to allow comparisons */
5045         memset(fh, 0, sizeof(*fh));
5046
5047         status = decode_op_hdr(xdr, OP_GETFH);
5048         if (status)
5049                 return status;
5050
5051         p = xdr_inline_decode(xdr, 4);
5052         if (unlikely(!p))
5053                 return -EIO;
5054         len = be32_to_cpup(p);
5055         if (len > NFS4_FHSIZE || len == 0) {
5056                 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
5057                 return -EREMOTEIO;
5058         }
5059         fh->size = len;
5060         p = xdr_inline_decode(xdr, len);
5061         if (unlikely(!p))
5062                 return -EIO;
5063         memcpy(fh->data, p, len);
5064         return 0;
5065 }
5066
5067 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5068 {
5069         int status;
5070
5071         status = decode_op_hdr(xdr, OP_LINK);
5072         if (status)
5073                 return status;
5074         return decode_change_info(xdr, cinfo);
5075 }
5076
5077 /*
5078  * We create the owner, so we know a proper owner.id length is 4.
5079  */
5080 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5081 {
5082         uint64_t offset, length, clientid;
5083         __be32 *p;
5084         uint32_t namelen, type;
5085
5086         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5087         if (unlikely(!p))
5088                 return -EIO;
5089         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5090         p = xdr_decode_hyper(p, &length);
5091         type = be32_to_cpup(p++); /* 4 byte read */
5092         if (fl != NULL) { /* manipulate file lock */
5093                 fl->fl_start = (loff_t)offset;
5094                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5095                 if (length == ~(uint64_t)0)
5096                         fl->fl_end = OFFSET_MAX;
5097                 fl->c.flc_type = F_WRLCK;
5098                 if (type & 1)
5099                         fl->c.flc_type = F_RDLCK;
5100                 fl->c.flc_pid = 0;
5101         }
5102         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5103         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5104         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5105         if (likely(!p))
5106                 return -EIO;
5107         return -NFS4ERR_DENIED;
5108 }
5109
5110 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5111 {
5112         int status;
5113
5114         status = decode_op_hdr(xdr, OP_LOCK);
5115         if (status == -EIO)
5116                 goto out;
5117         if (status == 0) {
5118                 status = decode_lock_stateid(xdr, &res->stateid);
5119                 if (unlikely(status))
5120                         goto out;
5121         } else if (status == -NFS4ERR_DENIED)
5122                 status = decode_lock_denied(xdr, NULL);
5123         if (res->open_seqid != NULL)
5124                 nfs_increment_open_seqid(status, res->open_seqid);
5125         nfs_increment_lock_seqid(status, res->lock_seqid);
5126 out:
5127         return status;
5128 }
5129
5130 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5131 {
5132         int status;
5133         status = decode_op_hdr(xdr, OP_LOCKT);
5134         if (status == -NFS4ERR_DENIED)
5135                 return decode_lock_denied(xdr, res->denied);
5136         return status;
5137 }
5138
5139 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5140 {
5141         int status;
5142
5143         status = decode_op_hdr(xdr, OP_LOCKU);
5144         if (status != -EIO)
5145                 nfs_increment_lock_seqid(status, res->seqid);
5146         if (status == 0)
5147                 status = decode_lock_stateid(xdr, &res->stateid);
5148         return status;
5149 }
5150
5151 static int decode_release_lockowner(struct xdr_stream *xdr)
5152 {
5153         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5154 }
5155
5156 static int decode_lookup(struct xdr_stream *xdr)
5157 {
5158         return decode_op_hdr(xdr, OP_LOOKUP);
5159 }
5160
5161 static int decode_lookupp(struct xdr_stream *xdr)
5162 {
5163         return decode_op_hdr(xdr, OP_LOOKUPP);
5164 }
5165
5166 /* This is too sick! */
5167 static int decode_space_limit(struct xdr_stream *xdr,
5168                 unsigned long *pagemod_limit)
5169 {
5170         __be32 *p;
5171         uint32_t limit_type, nblocks, blocksize;
5172         u64 maxsize = 0;
5173
5174         p = xdr_inline_decode(xdr, 12);
5175         if (unlikely(!p))
5176                 return -EIO;
5177         limit_type = be32_to_cpup(p++);
5178         switch (limit_type) {
5179         case NFS4_LIMIT_SIZE:
5180                 xdr_decode_hyper(p, &maxsize);
5181                 break;
5182         case NFS4_LIMIT_BLOCKS:
5183                 nblocks = be32_to_cpup(p++);
5184                 blocksize = be32_to_cpup(p);
5185                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5186         }
5187         maxsize >>= PAGE_SHIFT;
5188         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5189         return 0;
5190 }
5191
5192 static int decode_rw_delegation(struct xdr_stream *xdr,
5193                 struct nfs4_open_delegation *res)
5194 {
5195         __be32 *p;
5196         int status;
5197
5198         status = decode_delegation_stateid(xdr, &res->stateid);
5199         if (unlikely(status))
5200                 return status;
5201         p = xdr_inline_decode(xdr, 4);
5202         if (unlikely(!p))
5203                 return -EIO;
5204         res->do_recall = be32_to_cpup(p);
5205
5206         switch (res->open_delegation_type) {
5207         case NFS4_OPEN_DELEGATE_READ:
5208         case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
5209                 res->type = FMODE_READ;
5210                 break;
5211         case NFS4_OPEN_DELEGATE_WRITE:
5212         case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
5213                 res->type = FMODE_WRITE|FMODE_READ;
5214                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5215                                 return -EIO;
5216         }
5217         return decode_ace(xdr, NULL);
5218 }
5219
5220 static int decode_no_delegation(struct xdr_stream *xdr,
5221                 struct nfs4_open_delegation *res)
5222 {
5223         __be32 *p;
5224
5225         p = xdr_inline_decode(xdr, 4);
5226         if (unlikely(!p))
5227                 return -EIO;
5228         res->why_no_delegation = be32_to_cpup(p);
5229         switch (res->why_no_delegation) {
5230                 case WND4_CONTENTION:
5231                 case WND4_RESOURCE:
5232                         p = xdr_inline_decode(xdr, 4);
5233                         if (unlikely(!p))
5234                                 return -EIO;
5235                         res->will_notify = be32_to_cpup(p);
5236         }
5237         return 0;
5238 }
5239
5240 static int decode_delegation(struct xdr_stream *xdr,
5241                 struct nfs4_open_delegation *res)
5242 {
5243         __be32 *p;
5244
5245         p = xdr_inline_decode(xdr, 4);
5246         if (unlikely(!p))
5247                 return -EIO;
5248         res->open_delegation_type = be32_to_cpup(p);
5249         switch (res->open_delegation_type) {
5250         case NFS4_OPEN_DELEGATE_NONE:
5251                 return 0;
5252         case NFS4_OPEN_DELEGATE_READ:
5253         case NFS4_OPEN_DELEGATE_WRITE:
5254         case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
5255         case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
5256                 return decode_rw_delegation(xdr, res);
5257         case NFS4_OPEN_DELEGATE_NONE_EXT:
5258                 return decode_no_delegation(xdr, res);
5259         }
5260         return -EIO;
5261 }
5262
5263 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5264 {
5265         __be32 *p;
5266         uint32_t savewords, bmlen, i;
5267         int status;
5268
5269         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5270                 return status;
5271         nfs_increment_open_seqid(status, res->seqid);
5272         if (status)
5273                 return status;
5274         status = decode_open_stateid(xdr, &res->stateid);
5275         if (unlikely(status))
5276                 return status;
5277
5278         decode_change_info(xdr, &res->cinfo);
5279
5280         p = xdr_inline_decode(xdr, 8);
5281         if (unlikely(!p))
5282                 return -EIO;
5283         res->rflags = be32_to_cpup(p++);
5284         bmlen = be32_to_cpup(p);
5285         if (bmlen > 10)
5286                 goto xdr_error;
5287
5288         p = xdr_inline_decode(xdr, bmlen << 2);
5289         if (unlikely(!p))
5290                 return -EIO;
5291         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5292         for (i = 0; i < savewords; ++i)
5293                 res->attrset[i] = be32_to_cpup(p++);
5294         for (; i < NFS4_BITMAP_SIZE; i++)
5295                 res->attrset[i] = 0;
5296
5297         return decode_delegation(xdr, &res->delegation);
5298 xdr_error:
5299         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5300         return -EIO;
5301 }
5302
5303 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5304 {
5305         int status;
5306
5307         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5308         if (status != -EIO)
5309                 nfs_increment_open_seqid(status, res->seqid);
5310         if (!status)
5311                 status = decode_open_stateid(xdr, &res->stateid);
5312         return status;
5313 }
5314
5315 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5316 {
5317         int status;
5318
5319         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5320         if (status != -EIO)
5321                 nfs_increment_open_seqid(status, res->seqid);
5322         if (!status)
5323                 status = decode_open_stateid(xdr, &res->stateid);
5324         return status;
5325 }
5326
5327 static int decode_putfh(struct xdr_stream *xdr)
5328 {
5329         return decode_op_hdr(xdr, OP_PUTFH);
5330 }
5331
5332 static int decode_putrootfh(struct xdr_stream *xdr)
5333 {
5334         return decode_op_hdr(xdr, OP_PUTROOTFH);
5335 }
5336
5337 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5338                        struct nfs_pgio_res *res)
5339 {
5340         __be32 *p;
5341         uint32_t count, eof, recvd;
5342         int status;
5343
5344         status = decode_op_hdr(xdr, OP_READ);
5345         if (status)
5346                 return status;
5347         p = xdr_inline_decode(xdr, 8);
5348         if (unlikely(!p))
5349                 return -EIO;
5350         eof = be32_to_cpup(p++);
5351         count = be32_to_cpup(p);
5352         recvd = xdr_read_pages(xdr, count);
5353         if (count > recvd) {
5354                 dprintk("NFS: server cheating in read reply: "
5355                                 "count %u > recvd %u\n", count, recvd);
5356                 count = recvd;
5357                 eof = 0;
5358         }
5359         res->eof = eof;
5360         res->count = count;
5361         return 0;
5362 }
5363
5364 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5365 {
5366         int             status;
5367         __be32          verf[2];
5368
5369         status = decode_op_hdr(xdr, OP_READDIR);
5370         if (!status)
5371                 status = decode_verifier(xdr, readdir->verifier.data);
5372         if (unlikely(status))
5373                 return status;
5374         memcpy(verf, readdir->verifier.data, sizeof(verf));
5375         dprintk("%s: verifier = %08x:%08x\n",
5376                         __func__, verf[0], verf[1]);
5377         return xdr_read_pages(xdr, xdr->buf->page_len);
5378 }
5379
5380 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5381 {
5382         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5383         u32 len, recvd;
5384         __be32 *p;
5385         int status;
5386
5387         status = decode_op_hdr(xdr, OP_READLINK);
5388         if (status)
5389                 return status;
5390
5391         /* Convert length of symlink */
5392         p = xdr_inline_decode(xdr, 4);
5393         if (unlikely(!p))
5394                 return -EIO;
5395         len = be32_to_cpup(p);
5396         if (len >= rcvbuf->page_len || len <= 0) {
5397                 dprintk("nfs: server returned giant symlink!\n");
5398                 return -ENAMETOOLONG;
5399         }
5400         recvd = xdr_read_pages(xdr, len);
5401         if (recvd < len) {
5402                 dprintk("NFS: server cheating in readlink reply: "
5403                                 "count %u > recvd %u\n", len, recvd);
5404                 return -EIO;
5405         }
5406         /*
5407          * The XDR encode routine has set things up so that
5408          * the link text will be copied directly into the
5409          * buffer.  We just have to do overflow-checking,
5410          * and null-terminate the text (the VFS expects
5411          * null-termination).
5412          */
5413         xdr_terminate_string(rcvbuf, len);
5414         return 0;
5415 }
5416
5417 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5418 {
5419         int status;
5420
5421         status = decode_op_hdr(xdr, OP_REMOVE);
5422         if (status)
5423                 goto out;
5424         status = decode_change_info(xdr, cinfo);
5425 out:
5426         return status;
5427 }
5428
5429 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5430               struct nfs4_change_info *new_cinfo)
5431 {
5432         int status;
5433
5434         status = decode_op_hdr(xdr, OP_RENAME);
5435         if (status)
5436                 goto out;
5437         if ((status = decode_change_info(xdr, old_cinfo)))
5438                 goto out;
5439         status = decode_change_info(xdr, new_cinfo);
5440 out:
5441         return status;
5442 }
5443
5444 static int decode_renew(struct xdr_stream *xdr)
5445 {
5446         return decode_op_hdr(xdr, OP_RENEW);
5447 }
5448
5449 static int
5450 decode_restorefh(struct xdr_stream *xdr)
5451 {
5452         return decode_op_hdr(xdr, OP_RESTOREFH);
5453 }
5454
5455 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5456                          struct nfs_getaclres *res, enum nfs4_acl_type type)
5457 {
5458         unsigned int savep;
5459         uint32_t attrlen,
5460                  bitmap[3] = {0};
5461         int status;
5462
5463         res->acl_len = 0;
5464         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5465                 goto out;
5466
5467         xdr_enter_page(xdr, xdr->buf->page_len);
5468
5469         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5470                 goto out;
5471         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5472                 goto out;
5473
5474         switch (type) {
5475         default:
5476                 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5477                         return -EIO;
5478                 if (!(bitmap[0] & FATTR4_WORD0_ACL))
5479                         return -EOPNOTSUPP;
5480                 break;
5481         case NFS4ACL_DACL:
5482                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U)))
5483                         return -EIO;
5484                 if (!(bitmap[1] & FATTR4_WORD1_DACL))
5485                         return -EOPNOTSUPP;
5486                 break;
5487         case NFS4ACL_SACL:
5488                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U)))
5489                         return -EIO;
5490                 if (!(bitmap[1] & FATTR4_WORD1_SACL))
5491                         return -EOPNOTSUPP;
5492         }
5493
5494         /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5495          * are stored with the acl data to handle the problem of
5496          * variable length bitmaps.*/
5497         res->acl_data_offset = xdr_page_pos(xdr);
5498         res->acl_len = attrlen;
5499
5500         /* Check for receive buffer overflow */
5501         if (res->acl_len > xdr_stream_remaining(xdr) ||
5502             res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5503                 res->acl_flags |= NFS4_ACL_TRUNC;
5504                 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5505                         attrlen, xdr_stream_remaining(xdr));
5506         }
5507 out:
5508         return status;
5509 }
5510
5511 static int
5512 decode_savefh(struct xdr_stream *xdr)
5513 {
5514         return decode_op_hdr(xdr, OP_SAVEFH);
5515 }
5516
5517 static int decode_setattr(struct xdr_stream *xdr)
5518 {
5519         int status;
5520
5521         status = decode_op_hdr(xdr, OP_SETATTR);
5522         if (status)
5523                 return status;
5524         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5525                 return 0;
5526         return -EIO;
5527 }
5528
5529 static int decode_delegattr(struct xdr_stream *xdr)
5530 {
5531         return decode_setattr(xdr);
5532 }
5533
5534 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5535 {
5536         __be32 *p;
5537         uint32_t opnum;
5538         int32_t nfserr;
5539
5540         p = xdr_inline_decode(xdr, 8);
5541         if (unlikely(!p))
5542                 return -EIO;
5543         opnum = be32_to_cpup(p++);
5544         if (opnum != OP_SETCLIENTID) {
5545                 dprintk("nfs: decode_setclientid: Server returned operation"
5546                         " %d\n", opnum);
5547                 return -EIO;
5548         }
5549         nfserr = be32_to_cpup(p);
5550         if (nfserr == NFS_OK) {
5551                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5552                 if (unlikely(!p))
5553                         return -EIO;
5554                 p = xdr_decode_hyper(p, &res->clientid);
5555                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5556         } else if (nfserr == NFSERR_CLID_INUSE) {
5557                 uint32_t len;
5558
5559                 /* skip netid string */
5560                 p = xdr_inline_decode(xdr, 4);
5561                 if (unlikely(!p))
5562                         return -EIO;
5563                 len = be32_to_cpup(p);
5564                 p = xdr_inline_decode(xdr, len);
5565                 if (unlikely(!p))
5566                         return -EIO;
5567
5568                 /* skip uaddr string */
5569                 p = xdr_inline_decode(xdr, 4);
5570                 if (unlikely(!p))
5571                         return -EIO;
5572                 len = be32_to_cpup(p);
5573                 p = xdr_inline_decode(xdr, len);
5574                 if (unlikely(!p))
5575                         return -EIO;
5576                 return -NFSERR_CLID_INUSE;
5577         } else
5578                 return nfs4_stat_to_errno(nfserr);
5579
5580         return 0;
5581 }
5582
5583 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5584 {
5585         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5586 }
5587
5588 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5589 {
5590         __be32 *p;
5591         int status;
5592
5593         status = decode_op_hdr(xdr, OP_WRITE);
5594         if (status)
5595                 return status;
5596
5597         p = xdr_inline_decode(xdr, 8);
5598         if (unlikely(!p))
5599                 return -EIO;
5600         res->count = be32_to_cpup(p++);
5601         res->verf->committed = be32_to_cpup(p++);
5602         return decode_write_verifier(xdr, &res->verf->verifier);
5603 }
5604
5605 static int decode_delegreturn(struct xdr_stream *xdr)
5606 {
5607         return decode_op_hdr(xdr, OP_DELEGRETURN);
5608 }
5609
5610 static int decode_secinfo_gss(struct xdr_stream *xdr,
5611                               struct nfs4_secinfo4 *flavor)
5612 {
5613         u32 oid_len;
5614         __be32 *p;
5615
5616         p = xdr_inline_decode(xdr, 4);
5617         if (unlikely(!p))
5618                 return -EIO;
5619         oid_len = be32_to_cpup(p);
5620         if (oid_len > GSS_OID_MAX_LEN)
5621                 return -EINVAL;
5622
5623         p = xdr_inline_decode(xdr, oid_len);
5624         if (unlikely(!p))
5625                 return -EIO;
5626         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5627         flavor->flavor_info.oid.len = oid_len;
5628
5629         p = xdr_inline_decode(xdr, 8);
5630         if (unlikely(!p))
5631                 return -EIO;
5632         flavor->flavor_info.qop = be32_to_cpup(p++);
5633         flavor->flavor_info.service = be32_to_cpup(p);
5634
5635         return 0;
5636 }
5637
5638 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5639 {
5640         struct nfs4_secinfo4 *sec_flavor;
5641         unsigned int i, num_flavors;
5642         int status;
5643         __be32 *p;
5644
5645         p = xdr_inline_decode(xdr, 4);
5646         if (unlikely(!p))
5647                 return -EIO;
5648
5649         res->flavors->num_flavors = 0;
5650         num_flavors = be32_to_cpup(p);
5651
5652         for (i = 0; i < num_flavors; i++) {
5653                 sec_flavor = &res->flavors->flavors[i];
5654                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5655                         break;
5656
5657                 p = xdr_inline_decode(xdr, 4);
5658                 if (unlikely(!p))
5659                         return -EIO;
5660                 sec_flavor->flavor = be32_to_cpup(p);
5661
5662                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5663                         status = decode_secinfo_gss(xdr, sec_flavor);
5664                         if (status)
5665                                 goto out;
5666                 }
5667                 res->flavors->num_flavors++;
5668         }
5669
5670         status = 0;
5671 out:
5672         return status;
5673 }
5674
5675 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5676 {
5677         int status = decode_op_hdr(xdr, OP_SECINFO);
5678         if (status)
5679                 return status;
5680         return decode_secinfo_common(xdr, res);
5681 }
5682
5683 #if defined(CONFIG_NFS_V4_1)
5684 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5685 {
5686         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5687         if (status)
5688                 return status;
5689         return decode_secinfo_common(xdr, res);
5690 }
5691
5692 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5693 {
5694         if (xdr_stream_decode_uint32_array(xdr, op_map->u.words,
5695                                            ARRAY_SIZE(op_map->u.words)) < 0)
5696                 return -EIO;
5697         return 0;
5698 }
5699
5700 static int decode_exchange_id(struct xdr_stream *xdr,
5701                               struct nfs41_exchange_id_res *res)
5702 {
5703         __be32 *p;
5704         uint32_t dummy;
5705         char *dummy_str;
5706         int status;
5707         uint32_t impl_id_count;
5708
5709         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5710         if (status)
5711                 return status;
5712
5713         p = xdr_inline_decode(xdr, 8);
5714         if (unlikely(!p))
5715                 return -EIO;
5716         xdr_decode_hyper(p, &res->clientid);
5717         p = xdr_inline_decode(xdr, 12);
5718         if (unlikely(!p))
5719                 return -EIO;
5720         res->seqid = be32_to_cpup(p++);
5721         res->flags = be32_to_cpup(p++);
5722
5723         res->state_protect.how = be32_to_cpup(p);
5724         switch (res->state_protect.how) {
5725         case SP4_NONE:
5726                 break;
5727         case SP4_MACH_CRED:
5728                 status = decode_op_map(xdr, &res->state_protect.enforce);
5729                 if (status)
5730                         return status;
5731                 status = decode_op_map(xdr, &res->state_protect.allow);
5732                 if (status)
5733                         return status;
5734                 break;
5735         default:
5736                 WARN_ON_ONCE(1);
5737                 return -EIO;
5738         }
5739
5740         /* server_owner4.so_minor_id */
5741         p = xdr_inline_decode(xdr, 8);
5742         if (unlikely(!p))
5743                 return -EIO;
5744         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5745
5746         /* server_owner4.so_major_id */
5747         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5748         if (unlikely(status))
5749                 return status;
5750         memcpy(res->server_owner->major_id, dummy_str, dummy);
5751         res->server_owner->major_id_sz = dummy;
5752
5753         /* server_scope4 */
5754         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5755         if (unlikely(status))
5756                 return status;
5757         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5758         res->server_scope->server_scope_sz = dummy;
5759
5760         /* Implementation Id */
5761         p = xdr_inline_decode(xdr, 4);
5762         if (unlikely(!p))
5763                 return -EIO;
5764         impl_id_count = be32_to_cpup(p++);
5765
5766         if (impl_id_count) {
5767                 /* nii_domain */
5768                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5769                 if (unlikely(status))
5770                         return status;
5771                 memcpy(res->impl_id->domain, dummy_str, dummy);
5772
5773                 /* nii_name */
5774                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5775                 if (unlikely(status))
5776                         return status;
5777                 memcpy(res->impl_id->name, dummy_str, dummy);
5778
5779                 /* nii_date */
5780                 p = xdr_inline_decode(xdr, 12);
5781                 if (unlikely(!p))
5782                         return -EIO;
5783                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5784                 res->impl_id->date.nseconds = be32_to_cpup(p);
5785
5786                 /* if there's more than one entry, ignore the rest */
5787         }
5788         return 0;
5789 }
5790
5791 static int decode_chan_attrs(struct xdr_stream *xdr,
5792                              struct nfs4_channel_attrs *attrs)
5793 {
5794         __be32 *p;
5795         u32 nr_attrs, val;
5796
5797         p = xdr_inline_decode(xdr, 28);
5798         if (unlikely(!p))
5799                 return -EIO;
5800         val = be32_to_cpup(p++);        /* headerpadsz */
5801         if (val)
5802                 return -EINVAL;         /* no support for header padding yet */
5803         attrs->max_rqst_sz = be32_to_cpup(p++);
5804         attrs->max_resp_sz = be32_to_cpup(p++);
5805         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5806         attrs->max_ops = be32_to_cpup(p++);
5807         attrs->max_reqs = be32_to_cpup(p++);
5808         nr_attrs = be32_to_cpup(p);
5809         if (unlikely(nr_attrs > 1)) {
5810                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5811                         "count %u\n", __func__, nr_attrs);
5812                 return -EINVAL;
5813         }
5814         if (nr_attrs == 1) {
5815                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5816                 if (unlikely(!p))
5817                         return -EIO;
5818         }
5819         return 0;
5820 }
5821
5822 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5823 {
5824         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5825 }
5826
5827 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5828                                 struct nfs41_bind_conn_to_session_res *res)
5829 {
5830         __be32 *p;
5831         int status;
5832
5833         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5834         if (!status)
5835                 status = decode_sessionid(xdr, &res->sessionid);
5836         if (unlikely(status))
5837                 return status;
5838
5839         /* dir flags, rdma mode bool */
5840         p = xdr_inline_decode(xdr, 8);
5841         if (unlikely(!p))
5842                 return -EIO;
5843
5844         res->dir = be32_to_cpup(p++);
5845         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5846                 return -EIO;
5847         if (be32_to_cpup(p) == 0)
5848                 res->use_conn_in_rdma_mode = false;
5849         else
5850                 res->use_conn_in_rdma_mode = true;
5851
5852         return 0;
5853 }
5854
5855 static int decode_create_session(struct xdr_stream *xdr,
5856                                  struct nfs41_create_session_res *res)
5857 {
5858         __be32 *p;
5859         int status;
5860
5861         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5862         if (!status)
5863                 status = decode_sessionid(xdr, &res->sessionid);
5864         if (unlikely(status))
5865                 return status;
5866
5867         /* seqid, flags */
5868         p = xdr_inline_decode(xdr, 8);
5869         if (unlikely(!p))
5870                 return -EIO;
5871         res->seqid = be32_to_cpup(p++);
5872         res->flags = be32_to_cpup(p);
5873
5874         /* Channel attributes */
5875         status = decode_chan_attrs(xdr, &res->fc_attrs);
5876         if (!status)
5877                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5878         return status;
5879 }
5880
5881 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5882 {
5883         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5884 }
5885
5886 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5887 {
5888         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5889 }
5890
5891 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5892 {
5893         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5894 }
5895 #endif /* CONFIG_NFS_V4_1 */
5896
5897 static int decode_sequence(struct xdr_stream *xdr,
5898                            struct nfs4_sequence_res *res,
5899                            struct rpc_rqst *rqstp)
5900 {
5901 #if defined(CONFIG_NFS_V4_1)
5902         struct nfs4_session *session;
5903         struct nfs4_sessionid id;
5904         u32 dummy;
5905         int status;
5906         __be32 *p;
5907
5908         if (res->sr_slot == NULL)
5909                 return 0;
5910         if (!res->sr_slot->table->session)
5911                 return 0;
5912
5913         status = decode_op_hdr(xdr, OP_SEQUENCE);
5914         if (!status)
5915                 status = decode_sessionid(xdr, &id);
5916         if (unlikely(status))
5917                 goto out_err;
5918
5919         /*
5920          * If the server returns different values for sessionID, slotID or
5921          * sequence number, the server is looney tunes.
5922          */
5923         status = -EREMOTEIO;
5924         session = res->sr_slot->table->session;
5925
5926         if (memcmp(id.data, session->sess_id.data,
5927                    NFS4_MAX_SESSIONID_LEN)) {
5928                 dprintk("%s Invalid session id\n", __func__);
5929                 goto out_err;
5930         }
5931
5932         p = xdr_inline_decode(xdr, 20);
5933         if (unlikely(!p))
5934                 goto out_overflow;
5935
5936         /* seqid */
5937         dummy = be32_to_cpup(p++);
5938         if (dummy != res->sr_slot->seq_nr) {
5939                 dprintk("%s Invalid sequence number\n", __func__);
5940                 goto out_err;
5941         }
5942         /* slot id */
5943         dummy = be32_to_cpup(p++);
5944         if (dummy != res->sr_slot->slot_nr) {
5945                 dprintk("%s Invalid slot id\n", __func__);
5946                 goto out_err;
5947         }
5948         /* highest slot id */
5949         res->sr_highest_slotid = be32_to_cpup(p++);
5950         /* target highest slot id */
5951         res->sr_target_highest_slotid = be32_to_cpup(p++);
5952         /* result flags */
5953         res->sr_status_flags = be32_to_cpup(p);
5954         status = 0;
5955 out_err:
5956         res->sr_status = status;
5957         return status;
5958 out_overflow:
5959         status = -EIO;
5960         goto out_err;
5961 #else  /* CONFIG_NFS_V4_1 */
5962         return 0;
5963 #endif /* CONFIG_NFS_V4_1 */
5964 }
5965
5966 #if defined(CONFIG_NFS_V4_1)
5967 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5968 {
5969         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5970         return decode_stateid(xdr, stateid);
5971 }
5972
5973 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5974                                 struct nfs4_getdeviceinfo_res *res)
5975 {
5976         struct pnfs_device *pdev = res->pdev;
5977         __be32 *p;
5978         uint32_t len, type;
5979         int status;
5980
5981         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5982         if (status) {
5983                 if (status == -ETOOSMALL) {
5984                         p = xdr_inline_decode(xdr, 4);
5985                         if (unlikely(!p))
5986                                 return -EIO;
5987                         pdev->mincount = be32_to_cpup(p);
5988                         dprintk("%s: Min count too small. mincnt = %u\n",
5989                                 __func__, pdev->mincount);
5990                 }
5991                 return status;
5992         }
5993
5994         p = xdr_inline_decode(xdr, 8);
5995         if (unlikely(!p))
5996                 return -EIO;
5997         type = be32_to_cpup(p++);
5998         if (type != pdev->layout_type) {
5999                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
6000                         __func__, pdev->layout_type, type);
6001                 return -EINVAL;
6002         }
6003         /*
6004          * Get the length of the opaque device_addr4. xdr_read_pages places
6005          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6006          * and places the remaining xdr data in xdr_buf->tail
6007          */
6008         pdev->mincount = be32_to_cpup(p);
6009         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6010                 return -EIO;
6011
6012         /* Parse notification bitmap, verifying that it is zero. */
6013         p = xdr_inline_decode(xdr, 4);
6014         if (unlikely(!p))
6015                 return -EIO;
6016         len = be32_to_cpup(p);
6017         if (len) {
6018                 uint32_t i;
6019
6020                 p = xdr_inline_decode(xdr, 4 * len);
6021                 if (unlikely(!p))
6022                         return -EIO;
6023
6024                 res->notification = be32_to_cpup(p++);
6025                 for (i = 1; i < len; i++) {
6026                         if (be32_to_cpup(p++)) {
6027                                 dprintk("%s: unsupported notification\n",
6028                                         __func__);
6029                                 return -EIO;
6030                         }
6031                 }
6032         }
6033         return 0;
6034 }
6035
6036 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6037                             struct nfs4_layoutget_res *res)
6038 {
6039         __be32 *p;
6040         int status;
6041         u32 layout_count;
6042         u32 recvd;
6043
6044         status = decode_op_hdr(xdr, OP_LAYOUTGET);
6045         if (status)
6046                 goto out;
6047         p = xdr_inline_decode(xdr, 4);
6048         if (unlikely(!p))
6049                 goto out_overflow;
6050         res->return_on_close = be32_to_cpup(p);
6051         decode_layout_stateid(xdr, &res->stateid);
6052         p = xdr_inline_decode(xdr, 4);
6053         if (unlikely(!p))
6054                 goto out_overflow;
6055         layout_count = be32_to_cpup(p);
6056         if (!layout_count) {
6057                 dprintk("%s: server responded with empty layout array\n",
6058                         __func__);
6059                 status = -EINVAL;
6060                 goto out;
6061         }
6062
6063         p = xdr_inline_decode(xdr, 28);
6064         if (unlikely(!p))
6065                 goto out_overflow;
6066         p = xdr_decode_hyper(p, &res->range.offset);
6067         p = xdr_decode_hyper(p, &res->range.length);
6068         res->range.iomode = be32_to_cpup(p++);
6069         res->type = be32_to_cpup(p++);
6070         res->layoutp->len = be32_to_cpup(p);
6071
6072         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6073                 __func__,
6074                 (unsigned long)res->range.offset,
6075                 (unsigned long)res->range.length,
6076                 res->range.iomode,
6077                 res->type,
6078                 res->layoutp->len);
6079
6080         recvd = xdr_read_pages(xdr, res->layoutp->len);
6081         if (res->layoutp->len > recvd) {
6082                 dprintk("NFS: server cheating in layoutget reply: "
6083                                 "layout len %u > recvd %u\n",
6084                                 res->layoutp->len, recvd);
6085                 status = -EINVAL;
6086                 goto out;
6087         }
6088
6089         if (layout_count > 1) {
6090                 /* We only handle a length one array at the moment.  Any
6091                  * further entries are just ignored.  Note that this means
6092                  * the client may see a response that is less than the
6093                  * minimum it requested.
6094                  */
6095                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6096                         __func__, layout_count);
6097         }
6098
6099 out:
6100         res->status = status;
6101         return status;
6102 out_overflow:
6103         status = -EIO;
6104         goto out;
6105 }
6106
6107 static int decode_layoutreturn(struct xdr_stream *xdr,
6108                                struct nfs4_layoutreturn_res *res)
6109 {
6110         __be32 *p;
6111         int status;
6112
6113         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6114         if (status)
6115                 return status;
6116         p = xdr_inline_decode(xdr, 4);
6117         if (unlikely(!p))
6118                 return -EIO;
6119         res->lrs_present = be32_to_cpup(p);
6120         if (res->lrs_present)
6121                 status = decode_layout_stateid(xdr, &res->stateid);
6122         else
6123                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6124         return status;
6125 }
6126
6127 static int decode_layoutcommit(struct xdr_stream *xdr,
6128                                struct rpc_rqst *req,
6129                                struct nfs4_layoutcommit_res *res)
6130 {
6131         __be32 *p;
6132         __u32 sizechanged;
6133         int status;
6134
6135         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6136         res->status = status;
6137         if (status)
6138                 return status;
6139
6140         p = xdr_inline_decode(xdr, 4);
6141         if (unlikely(!p))
6142                 return -EIO;
6143         sizechanged = be32_to_cpup(p);
6144
6145         if (sizechanged) {
6146                 /* throw away new size */
6147                 p = xdr_inline_decode(xdr, 8);
6148                 if (unlikely(!p))
6149                         return -EIO;
6150         }
6151         return 0;
6152 }
6153
6154 static int decode_test_stateid(struct xdr_stream *xdr,
6155                                struct nfs41_test_stateid_res *res)
6156 {
6157         __be32 *p;
6158         int status;
6159         int num_res;
6160
6161         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6162         if (status)
6163                 return status;
6164
6165         p = xdr_inline_decode(xdr, 4);
6166         if (unlikely(!p))
6167                 return -EIO;
6168         num_res = be32_to_cpup(p++);
6169         if (num_res != 1)
6170                 return -EIO;
6171
6172         p = xdr_inline_decode(xdr, 4);
6173         if (unlikely(!p))
6174                 return -EIO;
6175         res->status = be32_to_cpup(p++);
6176
6177         return status;
6178 }
6179
6180 static int decode_free_stateid(struct xdr_stream *xdr,
6181                                struct nfs41_free_stateid_res *res)
6182 {
6183         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6184         return res->status;
6185 }
6186 #else
6187 static inline
6188 int decode_layoutreturn(struct xdr_stream *xdr,
6189                                struct nfs4_layoutreturn_res *res)
6190 {
6191         return 0;
6192 }
6193
6194 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6195                             struct nfs4_layoutget_res *res)
6196 {
6197         return 0;
6198 }
6199
6200 #endif /* CONFIG_NFS_V4_1 */
6201
6202 /*
6203  * END OF "GENERIC" DECODE ROUTINES.
6204  */
6205
6206 /*
6207  * Decode OPEN_DOWNGRADE response
6208  */
6209 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6210                                        struct xdr_stream *xdr,
6211                                        void *data)
6212 {
6213         struct nfs_closeres *res = data;
6214         struct compound_hdr hdr;
6215         int status;
6216
6217         status = decode_compound_hdr(xdr, &hdr);
6218         if (status)
6219                 goto out;
6220         status = decode_sequence(xdr, &res->seq_res, rqstp);
6221         if (status)
6222                 goto out;
6223         status = decode_putfh(xdr);
6224         if (status)
6225                 goto out;
6226         if (res->lr_res) {
6227                 status = decode_layoutreturn(xdr, res->lr_res);
6228                 res->lr_ret = status;
6229                 if (status)
6230                         goto out;
6231         }
6232         status = decode_open_downgrade(xdr, res);
6233 out:
6234         return status;
6235 }
6236
6237 /*
6238  * Decode ACCESS response
6239  */
6240 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241                                void *data)
6242 {
6243         struct nfs4_accessres *res = data;
6244         struct compound_hdr hdr;
6245         int status;
6246
6247         status = decode_compound_hdr(xdr, &hdr);
6248         if (status)
6249                 goto out;
6250         status = decode_sequence(xdr, &res->seq_res, rqstp);
6251         if (status)
6252                 goto out;
6253         status = decode_putfh(xdr);
6254         if (status != 0)
6255                 goto out;
6256         status = decode_access(xdr, &res->supported, &res->access);
6257         if (status != 0)
6258                 goto out;
6259         if (res->fattr)
6260                 decode_getfattr(xdr, res->fattr, res->server);
6261 out:
6262         return status;
6263 }
6264
6265 /*
6266  * Decode LOOKUP response
6267  */
6268 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6269                                void *data)
6270 {
6271         struct nfs4_lookup_res *res = data;
6272         struct compound_hdr hdr;
6273         int status;
6274
6275         status = decode_compound_hdr(xdr, &hdr);
6276         if (status)
6277                 goto out;
6278         status = decode_sequence(xdr, &res->seq_res, rqstp);
6279         if (status)
6280                 goto out;
6281         status = decode_putfh(xdr);
6282         if (status)
6283                 goto out;
6284         status = decode_lookup(xdr);
6285         if (status)
6286                 goto out;
6287         status = decode_getfh(xdr, res->fh);
6288         if (status)
6289                 goto out;
6290         status = decode_getfattr(xdr, res->fattr, res->server);
6291 out:
6292         return status;
6293 }
6294
6295 /*
6296  * Decode LOOKUPP response
6297  */
6298 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299                 void *data)
6300 {
6301         struct nfs4_lookupp_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_lookupp(xdr);
6315         if (status)
6316                 goto out;
6317         status = decode_getfh(xdr, res->fh);
6318         if (status)
6319                 goto out;
6320         status = decode_getfattr(xdr, res->fattr, res->server);
6321 out:
6322         return status;
6323 }
6324
6325 /*
6326  * Decode LOOKUP_ROOT response
6327  */
6328 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6329                                     struct xdr_stream *xdr,
6330                                     void *data)
6331 {
6332         struct nfs4_lookup_res *res = data;
6333         struct compound_hdr hdr;
6334         int status;
6335
6336         status = decode_compound_hdr(xdr, &hdr);
6337         if (status)
6338                 goto out;
6339         status = decode_sequence(xdr, &res->seq_res, rqstp);
6340         if (status)
6341                 goto out;
6342         status = decode_putrootfh(xdr);
6343         if (status)
6344                 goto out;
6345         status = decode_getfh(xdr, res->fh);
6346         if (status == 0)
6347                 status = decode_getfattr(xdr, res->fattr, res->server);
6348 out:
6349         return status;
6350 }
6351
6352 /*
6353  * Decode REMOVE response
6354  */
6355 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356                                void *data)
6357 {
6358         struct nfs_removeres *res = data;
6359         struct compound_hdr hdr;
6360         int status;
6361
6362         status = decode_compound_hdr(xdr, &hdr);
6363         if (status)
6364                 goto out;
6365         status = decode_sequence(xdr, &res->seq_res, rqstp);
6366         if (status)
6367                 goto out;
6368         status = decode_putfh(xdr);
6369         if (status)
6370                 goto out;
6371         status = decode_remove(xdr, &res->cinfo);
6372 out:
6373         return status;
6374 }
6375
6376 /*
6377  * Decode RENAME response
6378  */
6379 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6380                                void *data)
6381 {
6382         struct nfs_renameres *res = data;
6383         struct compound_hdr hdr;
6384         int status;
6385
6386         status = decode_compound_hdr(xdr, &hdr);
6387         if (status)
6388                 goto out;
6389         status = decode_sequence(xdr, &res->seq_res, rqstp);
6390         if (status)
6391                 goto out;
6392         status = decode_putfh(xdr);
6393         if (status)
6394                 goto out;
6395         status = decode_savefh(xdr);
6396         if (status)
6397                 goto out;
6398         status = decode_putfh(xdr);
6399         if (status)
6400                 goto out;
6401         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6402 out:
6403         return status;
6404 }
6405
6406 /*
6407  * Decode LINK response
6408  */
6409 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6410                              void *data)
6411 {
6412         struct nfs4_link_res *res = data;
6413         struct compound_hdr hdr;
6414         int status;
6415
6416         status = decode_compound_hdr(xdr, &hdr);
6417         if (status)
6418                 goto out;
6419         status = decode_sequence(xdr, &res->seq_res, rqstp);
6420         if (status)
6421                 goto out;
6422         status = decode_putfh(xdr);
6423         if (status)
6424                 goto out;
6425         status = decode_savefh(xdr);
6426         if (status)
6427                 goto out;
6428         status = decode_putfh(xdr);
6429         if (status)
6430                 goto out;
6431         status = decode_link(xdr, &res->cinfo);
6432         if (status)
6433                 goto out;
6434         /*
6435          * Note order: OP_LINK leaves the directory as the current
6436          *             filehandle.
6437          */
6438         status = decode_restorefh(xdr);
6439         if (status)
6440                 goto out;
6441         decode_getfattr(xdr, res->fattr, res->server);
6442 out:
6443         return status;
6444 }
6445
6446 /*
6447  * Decode CREATE response
6448  */
6449 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450                                void *data)
6451 {
6452         struct nfs4_create_res *res = data;
6453         struct compound_hdr hdr;
6454         int status;
6455
6456         status = decode_compound_hdr(xdr, &hdr);
6457         if (status)
6458                 goto out;
6459         status = decode_sequence(xdr, &res->seq_res, rqstp);
6460         if (status)
6461                 goto out;
6462         status = decode_putfh(xdr);
6463         if (status)
6464                 goto out;
6465         status = decode_create(xdr, &res->dir_cinfo);
6466         if (status)
6467                 goto out;
6468         status = decode_getfh(xdr, res->fh);
6469         if (status)
6470                 goto out;
6471         decode_getfattr(xdr, res->fattr, res->server);
6472 out:
6473         return status;
6474 }
6475
6476 /*
6477  * Decode SYMLINK response
6478  */
6479 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480                                 void *res)
6481 {
6482         return nfs4_xdr_dec_create(rqstp, xdr, res);
6483 }
6484
6485 /*
6486  * Decode GETATTR response
6487  */
6488 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6489                                 void *data)
6490 {
6491         struct nfs4_getattr_res *res = data;
6492         struct compound_hdr hdr;
6493         int status;
6494
6495         status = decode_compound_hdr(xdr, &hdr);
6496         if (status)
6497                 goto out;
6498         status = decode_sequence(xdr, &res->seq_res, rqstp);
6499         if (status)
6500                 goto out;
6501         status = decode_putfh(xdr);
6502         if (status)
6503                 goto out;
6504         status = decode_getfattr(xdr, res->fattr, res->server);
6505 out:
6506         return status;
6507 }
6508
6509 /*
6510  * Encode an SETACL request
6511  */
6512 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6513                                 const void *data)
6514 {
6515         const struct nfs_setaclargs *args = data;
6516         struct compound_hdr hdr = {
6517                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6518         };
6519
6520         encode_compound_hdr(xdr, req, &hdr);
6521         encode_sequence(xdr, &args->seq_args, &hdr);
6522         encode_putfh(xdr, args->fh, &hdr);
6523         encode_setacl(xdr, args, &hdr);
6524         encode_nops(&hdr);
6525 }
6526
6527 /*
6528  * Decode SETACL response
6529  */
6530 static int
6531 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6532                     void *data)
6533 {
6534         struct nfs_setaclres *res = data;
6535         struct compound_hdr hdr;
6536         int status;
6537
6538         status = decode_compound_hdr(xdr, &hdr);
6539         if (status)
6540                 goto out;
6541         status = decode_sequence(xdr, &res->seq_res, rqstp);
6542         if (status)
6543                 goto out;
6544         status = decode_putfh(xdr);
6545         if (status)
6546                 goto out;
6547         status = decode_setattr(xdr);
6548 out:
6549         return status;
6550 }
6551
6552 /*
6553  * Decode GETACL response
6554  */
6555 static int
6556 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6557                     void *data)
6558 {
6559         struct nfs_getaclres *res = data;
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         if (res->acl_scratch != NULL)
6564                 xdr_set_scratch_page(xdr, res->acl_scratch);
6565         status = decode_compound_hdr(xdr, &hdr);
6566         if (status)
6567                 goto out;
6568         status = decode_sequence(xdr, &res->seq_res, rqstp);
6569         if (status)
6570                 goto out;
6571         status = decode_putfh(xdr);
6572         if (status)
6573                 goto out;
6574         status = decode_getacl(xdr, rqstp, res, res->acl_type);
6575
6576 out:
6577         return status;
6578 }
6579
6580 /*
6581  * Decode CLOSE response
6582  */
6583 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584                               void *data)
6585 {
6586         struct nfs_closeres *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         if (res->lr_res) {
6600                 status = decode_layoutreturn(xdr, res->lr_res);
6601                 res->lr_ret = status;
6602                 if (status)
6603                         goto out;
6604         }
6605         if (res->fattr != NULL) {
6606                 status = decode_getfattr(xdr, res->fattr, res->server);
6607                 if (status != 0)
6608                         goto out;
6609         }
6610         status = decode_close(xdr, res);
6611 out:
6612         return status;
6613 }
6614
6615 /*
6616  * Decode OPEN response
6617  */
6618 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6619                              void *data)
6620 {
6621         struct nfs_openres *res = data;
6622         struct compound_hdr hdr;
6623         int status;
6624
6625         status = decode_compound_hdr(xdr, &hdr);
6626         if (status)
6627                 goto out;
6628         status = decode_sequence(xdr, &res->seq_res, rqstp);
6629         if (status)
6630                 goto out;
6631         status = decode_putfh(xdr);
6632         if (status)
6633                 goto out;
6634         status = decode_open(xdr, res);
6635         if (status)
6636                 goto out;
6637         status = decode_getfh(xdr, &res->fh);
6638         if (status)
6639                 goto out;
6640         if (res->access_request)
6641                 decode_access(xdr, &res->access_supported, &res->access_result);
6642         decode_getfattr(xdr, res->f_attr, res->server);
6643         if (res->lg_res)
6644                 decode_layoutget(xdr, rqstp, res->lg_res);
6645 out:
6646         return status;
6647 }
6648
6649 /*
6650  * Decode OPEN_CONFIRM response
6651  */
6652 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6653                                      struct xdr_stream *xdr,
6654                                      void *data)
6655 {
6656         struct nfs_open_confirmres *res = data;
6657         struct compound_hdr hdr;
6658         int status;
6659
6660         status = decode_compound_hdr(xdr, &hdr);
6661         if (status)
6662                 goto out;
6663         status = decode_putfh(xdr);
6664         if (status)
6665                 goto out;
6666         status = decode_open_confirm(xdr, res);
6667 out:
6668         return status;
6669 }
6670
6671 /*
6672  * Decode OPEN response
6673  */
6674 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6675                                     struct xdr_stream *xdr,
6676                                     void *data)
6677 {
6678         struct nfs_openres *res = data;
6679         struct compound_hdr hdr;
6680         int status;
6681
6682         status = decode_compound_hdr(xdr, &hdr);
6683         if (status)
6684                 goto out;
6685         status = decode_sequence(xdr, &res->seq_res, rqstp);
6686         if (status)
6687                 goto out;
6688         status = decode_putfh(xdr);
6689         if (status)
6690                 goto out;
6691         status = decode_open(xdr, res);
6692         if (status)
6693                 goto out;
6694         if (res->access_request)
6695                 decode_access(xdr, &res->access_supported, &res->access_result);
6696         decode_getfattr(xdr, res->f_attr, res->server);
6697         if (res->lg_res)
6698                 decode_layoutget(xdr, rqstp, res->lg_res);
6699 out:
6700         return status;
6701 }
6702
6703 /*
6704  * Decode SETATTR response
6705  */
6706 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6707                                 struct xdr_stream *xdr,
6708                                 void *data)
6709 {
6710         struct nfs_setattrres *res = data;
6711         struct compound_hdr hdr;
6712         int status;
6713
6714         status = decode_compound_hdr(xdr, &hdr);
6715         if (status)
6716                 goto out;
6717         status = decode_sequence(xdr, &res->seq_res, rqstp);
6718         if (status)
6719                 goto out;
6720         status = decode_putfh(xdr);
6721         if (status)
6722                 goto out;
6723         status = decode_setattr(xdr);
6724         if (status)
6725                 goto out;
6726         decode_getfattr(xdr, res->fattr, res->server);
6727 out:
6728         return status;
6729 }
6730
6731 /*
6732  * Decode LOCK response
6733  */
6734 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6735                              void *data)
6736 {
6737         struct nfs_lock_res *res = data;
6738         struct compound_hdr hdr;
6739         int status;
6740
6741         status = decode_compound_hdr(xdr, &hdr);
6742         if (status)
6743                 goto out;
6744         status = decode_sequence(xdr, &res->seq_res, rqstp);
6745         if (status)
6746                 goto out;
6747         status = decode_putfh(xdr);
6748         if (status)
6749                 goto out;
6750         status = decode_lock(xdr, res);
6751 out:
6752         return status;
6753 }
6754
6755 /*
6756  * Decode LOCKT response
6757  */
6758 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6759                               void *data)
6760 {
6761         struct nfs_lockt_res *res = data;
6762         struct compound_hdr hdr;
6763         int status;
6764
6765         status = decode_compound_hdr(xdr, &hdr);
6766         if (status)
6767                 goto out;
6768         status = decode_sequence(xdr, &res->seq_res, rqstp);
6769         if (status)
6770                 goto out;
6771         status = decode_putfh(xdr);
6772         if (status)
6773                 goto out;
6774         status = decode_lockt(xdr, res);
6775 out:
6776         return status;
6777 }
6778
6779 /*
6780  * Decode LOCKU response
6781  */
6782 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6783                               void *data)
6784 {
6785         struct nfs_locku_res *res = data;
6786         struct compound_hdr hdr;
6787         int status;
6788
6789         status = decode_compound_hdr(xdr, &hdr);
6790         if (status)
6791                 goto out;
6792         status = decode_sequence(xdr, &res->seq_res, rqstp);
6793         if (status)
6794                 goto out;
6795         status = decode_putfh(xdr);
6796         if (status)
6797                 goto out;
6798         status = decode_locku(xdr, res);
6799 out:
6800         return status;
6801 }
6802
6803 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6804                                           struct xdr_stream *xdr, void *dummy)
6805 {
6806         struct compound_hdr hdr;
6807         int status;
6808
6809         status = decode_compound_hdr(xdr, &hdr);
6810         if (!status)
6811                 status = decode_release_lockowner(xdr);
6812         return status;
6813 }
6814
6815 /*
6816  * Decode READLINK response
6817  */
6818 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6819                                  struct xdr_stream *xdr,
6820                                  void *data)
6821 {
6822         struct nfs4_readlink_res *res = data;
6823         struct compound_hdr hdr;
6824         int status;
6825
6826         status = decode_compound_hdr(xdr, &hdr);
6827         if (status)
6828                 goto out;
6829         status = decode_sequence(xdr, &res->seq_res, rqstp);
6830         if (status)
6831                 goto out;
6832         status = decode_putfh(xdr);
6833         if (status)
6834                 goto out;
6835         status = decode_readlink(xdr, rqstp);
6836 out:
6837         return status;
6838 }
6839
6840 /*
6841  * Decode READDIR response
6842  */
6843 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6844                                 void *data)
6845 {
6846         struct nfs4_readdir_res *res = data;
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         if (status)
6852                 goto out;
6853         status = decode_sequence(xdr, &res->seq_res, rqstp);
6854         if (status)
6855                 goto out;
6856         status = decode_putfh(xdr);
6857         if (status)
6858                 goto out;
6859         status = decode_readdir(xdr, rqstp, res);
6860 out:
6861         return status;
6862 }
6863
6864 /*
6865  * Decode Read response
6866  */
6867 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6868                              void *data)
6869 {
6870         struct nfs_pgio_res *res = data;
6871         struct compound_hdr hdr;
6872         int status;
6873
6874         status = decode_compound_hdr(xdr, &hdr);
6875         res->op_status = hdr.status;
6876         if (status)
6877                 goto out;
6878         status = decode_sequence(xdr, &res->seq_res, rqstp);
6879         if (status)
6880                 goto out;
6881         status = decode_putfh(xdr);
6882         if (status)
6883                 goto out;
6884         status = decode_read(xdr, rqstp, res);
6885         if (!status)
6886                 status = res->count;
6887 out:
6888         return status;
6889 }
6890
6891 /*
6892  * Decode WRITE response
6893  */
6894 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6895                               void *data)
6896 {
6897         struct nfs_pgio_res *res = data;
6898         struct compound_hdr hdr;
6899         int status;
6900
6901         status = decode_compound_hdr(xdr, &hdr);
6902         res->op_status = hdr.status;
6903         if (status)
6904                 goto out;
6905         status = decode_sequence(xdr, &res->seq_res, rqstp);
6906         if (status)
6907                 goto out;
6908         status = decode_putfh(xdr);
6909         if (status)
6910                 goto out;
6911         status = decode_write(xdr, res);
6912         if (status)
6913                 goto out;
6914         if (res->fattr)
6915                 decode_getfattr(xdr, res->fattr, res->server);
6916         if (!status)
6917                 status = res->count;
6918 out:
6919         return status;
6920 }
6921
6922 /*
6923  * Decode COMMIT response
6924  */
6925 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6926                                void *data)
6927 {
6928         struct nfs_commitres *res = data;
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         res->op_status = hdr.status;
6934         if (status)
6935                 goto out;
6936         status = decode_sequence(xdr, &res->seq_res, rqstp);
6937         if (status)
6938                 goto out;
6939         status = decode_putfh(xdr);
6940         if (status)
6941                 goto out;
6942         status = decode_commit(xdr, res);
6943 out:
6944         return status;
6945 }
6946
6947 /*
6948  * Decode FSINFO response
6949  */
6950 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6951                                void *data)
6952 {
6953         struct nfs4_fsinfo_res *res = data;
6954         struct compound_hdr hdr;
6955         int status;
6956
6957         status = decode_compound_hdr(xdr, &hdr);
6958         if (!status)
6959                 status = decode_sequence(xdr, &res->seq_res, req);
6960         if (!status)
6961                 status = decode_putfh(xdr);
6962         if (!status)
6963                 status = decode_fsinfo(xdr, res->fsinfo);
6964         return status;
6965 }
6966
6967 /*
6968  * Decode PATHCONF response
6969  */
6970 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6971                                  void *data)
6972 {
6973         struct nfs4_pathconf_res *res = data;
6974         struct compound_hdr hdr;
6975         int status;
6976
6977         status = decode_compound_hdr(xdr, &hdr);
6978         if (!status)
6979                 status = decode_sequence(xdr, &res->seq_res, req);
6980         if (!status)
6981                 status = decode_putfh(xdr);
6982         if (!status)
6983                 status = decode_pathconf(xdr, res->pathconf);
6984         return status;
6985 }
6986
6987 /*
6988  * Decode STATFS response
6989  */
6990 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6991                                void *data)
6992 {
6993         struct nfs4_statfs_res *res = data;
6994         struct compound_hdr hdr;
6995         int status;
6996
6997         status = decode_compound_hdr(xdr, &hdr);
6998         if (!status)
6999                 status = decode_sequence(xdr, &res->seq_res, req);
7000         if (!status)
7001                 status = decode_putfh(xdr);
7002         if (!status)
7003                 status = decode_statfs(xdr, res->fsstat);
7004         return status;
7005 }
7006
7007 /*
7008  * Decode GETATTR_BITMAP response
7009  */
7010 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7011                                     struct xdr_stream *xdr,
7012                                     void *data)
7013 {
7014         struct nfs4_server_caps_res *res = data;
7015         struct compound_hdr hdr;
7016         int status;
7017
7018         status = decode_compound_hdr(xdr, &hdr);
7019         if (status)
7020                 goto out;
7021         status = decode_sequence(xdr, &res->seq_res, req);
7022         if (status)
7023                 goto out;
7024         status = decode_putfh(xdr);
7025         if (status)
7026                 goto out;
7027         status = decode_server_caps(xdr, res);
7028 out:
7029         return status;
7030 }
7031
7032 /*
7033  * Decode RENEW response
7034  */
7035 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7036                               void *__unused)
7037 {
7038         struct compound_hdr hdr;
7039         int status;
7040
7041         status = decode_compound_hdr(xdr, &hdr);
7042         if (!status)
7043                 status = decode_renew(xdr);
7044         return status;
7045 }
7046
7047 /*
7048  * Decode SETCLIENTID response
7049  */
7050 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7051                                     struct xdr_stream *xdr,
7052                                     void *data)
7053 {
7054         struct nfs4_setclientid_res *res = data;
7055         struct compound_hdr hdr;
7056         int status;
7057
7058         status = decode_compound_hdr(xdr, &hdr);
7059         if (!status)
7060                 status = decode_setclientid(xdr, res);
7061         return status;
7062 }
7063
7064 /*
7065  * Decode SETCLIENTID_CONFIRM response
7066  */
7067 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7068                                             struct xdr_stream *xdr,
7069                                             void *data)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_setclientid_confirm(xdr);
7077         return status;
7078 }
7079
7080 /*
7081  * Decode DELEGRETURN response
7082  */
7083 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7084                                     struct xdr_stream *xdr,
7085                                     void *data)
7086 {
7087         struct nfs4_delegreturnres *res = data;
7088         struct compound_hdr hdr;
7089         int status;
7090
7091         status = decode_compound_hdr(xdr, &hdr);
7092         if (status)
7093                 goto out;
7094         status = decode_sequence(xdr, &res->seq_res, rqstp);
7095         if (status)
7096                 goto out;
7097         status = decode_putfh(xdr);
7098         if (status != 0)
7099                 goto out;
7100         if (res->lr_res) {
7101                 status = decode_layoutreturn(xdr, res->lr_res);
7102                 res->lr_ret = status;
7103                 if (status)
7104                         goto out;
7105         }
7106         if (res->sattr_res) {
7107                 status = decode_delegattr(xdr);
7108                 res->sattr_ret = status;
7109                 if (status)
7110                         goto out;
7111         }
7112         if (res->fattr) {
7113                 status = decode_getfattr(xdr, res->fattr, res->server);
7114                 if (status != 0)
7115                         goto out;
7116         }
7117         status = decode_delegreturn(xdr);
7118 out:
7119         return status;
7120 }
7121
7122 /*
7123  * Decode FS_LOCATIONS response
7124  */
7125 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7126                                      struct xdr_stream *xdr,
7127                                      void *data)
7128 {
7129         struct nfs4_fs_locations_res *res = data;
7130         struct compound_hdr hdr;
7131         int status;
7132
7133         status = decode_compound_hdr(xdr, &hdr);
7134         if (status)
7135                 goto out;
7136         status = decode_sequence(xdr, &res->seq_res, req);
7137         if (status)
7138                 goto out;
7139         status = decode_putfh(xdr);
7140         if (status)
7141                 goto out;
7142         if (res->migration) {
7143                 xdr_enter_page(xdr, PAGE_SIZE);
7144                 status = decode_getfattr_generic(xdr,
7145                                         res->fs_locations->fattr,
7146                                          NULL, res->fs_locations,
7147                                          res->fs_locations->server);
7148                 if (status)
7149                         goto out;
7150                 if (res->renew)
7151                         status = decode_renew(xdr);
7152         } else {
7153                 status = decode_lookup(xdr);
7154                 if (status)
7155                         goto out;
7156                 xdr_enter_page(xdr, PAGE_SIZE);
7157                 status = decode_getfattr_generic(xdr,
7158                                         res->fs_locations->fattr,
7159                                          NULL, res->fs_locations,
7160                                          res->fs_locations->server);
7161         }
7162 out:
7163         return status;
7164 }
7165
7166 /*
7167  * Decode SECINFO response
7168  */
7169 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7170                                 struct xdr_stream *xdr,
7171                                 void *data)
7172 {
7173         struct nfs4_secinfo_res *res = data;
7174         struct compound_hdr hdr;
7175         int status;
7176
7177         status = decode_compound_hdr(xdr, &hdr);
7178         if (status)
7179                 goto out;
7180         status = decode_sequence(xdr, &res->seq_res, rqstp);
7181         if (status)
7182                 goto out;
7183         status = decode_putfh(xdr);
7184         if (status)
7185                 goto out;
7186         status = decode_secinfo(xdr, res);
7187 out:
7188         return status;
7189 }
7190
7191 /*
7192  * Decode FSID_PRESENT response
7193  */
7194 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7195                                      struct xdr_stream *xdr,
7196                                      void *data)
7197 {
7198         struct nfs4_fsid_present_res *res = data;
7199         struct compound_hdr hdr;
7200         int status;
7201
7202         status = decode_compound_hdr(xdr, &hdr);
7203         if (status)
7204                 goto out;
7205         status = decode_sequence(xdr, &res->seq_res, rqstp);
7206         if (status)
7207                 goto out;
7208         status = decode_putfh(xdr);
7209         if (status)
7210                 goto out;
7211         status = decode_getfh(xdr, res->fh);
7212         if (status)
7213                 goto out;
7214         if (res->renew)
7215                 status = decode_renew(xdr);
7216 out:
7217         return status;
7218 }
7219
7220 #if defined(CONFIG_NFS_V4_1)
7221 /*
7222  * Decode BIND_CONN_TO_SESSION response
7223  */
7224 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7225                                         struct xdr_stream *xdr,
7226                                         void *res)
7227 {
7228         struct compound_hdr hdr;
7229         int status;
7230
7231         status = decode_compound_hdr(xdr, &hdr);
7232         if (!status)
7233                 status = decode_bind_conn_to_session(xdr, res);
7234         return status;
7235 }
7236
7237 /*
7238  * Decode EXCHANGE_ID response
7239  */
7240 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7241                                     struct xdr_stream *xdr,
7242                                     void *res)
7243 {
7244         struct compound_hdr hdr;
7245         int status;
7246
7247         status = decode_compound_hdr(xdr, &hdr);
7248         if (!status)
7249                 status = decode_exchange_id(xdr, res);
7250         return status;
7251 }
7252
7253 /*
7254  * Decode CREATE_SESSION response
7255  */
7256 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7257                                        struct xdr_stream *xdr,
7258                                        void *res)
7259 {
7260         struct compound_hdr hdr;
7261         int status;
7262
7263         status = decode_compound_hdr(xdr, &hdr);
7264         if (!status)
7265                 status = decode_create_session(xdr, res);
7266         return status;
7267 }
7268
7269 /*
7270  * Decode DESTROY_SESSION response
7271  */
7272 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7273                                         struct xdr_stream *xdr,
7274                                         void *res)
7275 {
7276         struct compound_hdr hdr;
7277         int status;
7278
7279         status = decode_compound_hdr(xdr, &hdr);
7280         if (!status)
7281                 status = decode_destroy_session(xdr, res);
7282         return status;
7283 }
7284
7285 /*
7286  * Decode DESTROY_CLIENTID response
7287  */
7288 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7289                                         struct xdr_stream *xdr,
7290                                         void *res)
7291 {
7292         struct compound_hdr hdr;
7293         int status;
7294
7295         status = decode_compound_hdr(xdr, &hdr);
7296         if (!status)
7297                 status = decode_destroy_clientid(xdr, res);
7298         return status;
7299 }
7300
7301 /*
7302  * Decode SEQUENCE response
7303  */
7304 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7305                                  struct xdr_stream *xdr,
7306                                  void *res)
7307 {
7308         struct compound_hdr hdr;
7309         int status;
7310
7311         status = decode_compound_hdr(xdr, &hdr);
7312         if (!status)
7313                 status = decode_sequence(xdr, res, rqstp);
7314         return status;
7315 }
7316
7317 #endif
7318
7319 /*
7320  * Decode GET_LEASE_TIME response
7321  */
7322 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7323                                        struct xdr_stream *xdr,
7324                                        void *data)
7325 {
7326         struct nfs4_get_lease_time_res *res = data;
7327         struct compound_hdr hdr;
7328         int status;
7329
7330         status = decode_compound_hdr(xdr, &hdr);
7331         if (!status)
7332                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7333         if (!status)
7334                 status = decode_putrootfh(xdr);
7335         if (!status)
7336                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7337         return status;
7338 }
7339
7340 #ifdef CONFIG_NFS_V4_1
7341
7342 /*
7343  * Decode RECLAIM_COMPLETE response
7344  */
7345 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7346                                          struct xdr_stream *xdr,
7347                                          void *data)
7348 {
7349         struct nfs41_reclaim_complete_res *res = data;
7350         struct compound_hdr hdr;
7351         int status;
7352
7353         status = decode_compound_hdr(xdr, &hdr);
7354         if (!status)
7355                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7356         if (!status)
7357                 status = decode_reclaim_complete(xdr, NULL);
7358         return status;
7359 }
7360
7361 /*
7362  * Decode GETDEVINFO response
7363  */
7364 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7365                                       struct xdr_stream *xdr,
7366                                       void *data)
7367 {
7368         struct nfs4_getdeviceinfo_res *res = data;
7369         struct compound_hdr hdr;
7370         int status;
7371
7372         status = decode_compound_hdr(xdr, &hdr);
7373         if (status != 0)
7374                 goto out;
7375         status = decode_sequence(xdr, &res->seq_res, rqstp);
7376         if (status != 0)
7377                 goto out;
7378         status = decode_getdeviceinfo(xdr, res);
7379 out:
7380         return status;
7381 }
7382
7383 /*
7384  * Decode LAYOUTGET response
7385  */
7386 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7387                                   struct xdr_stream *xdr,
7388                                   void *data)
7389 {
7390         struct nfs4_layoutget_res *res = data;
7391         struct compound_hdr hdr;
7392         int status;
7393
7394         status = decode_compound_hdr(xdr, &hdr);
7395         if (status)
7396                 goto out;
7397         status = decode_sequence(xdr, &res->seq_res, rqstp);
7398         if (status)
7399                 goto out;
7400         status = decode_putfh(xdr);
7401         if (status)
7402                 goto out;
7403         status = decode_layoutget(xdr, rqstp, res);
7404 out:
7405         return status;
7406 }
7407
7408 /*
7409  * Decode LAYOUTRETURN response
7410  */
7411 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7412                                      struct xdr_stream *xdr,
7413                                      void *data)
7414 {
7415         struct nfs4_layoutreturn_res *res = data;
7416         struct compound_hdr hdr;
7417         int status;
7418
7419         status = decode_compound_hdr(xdr, &hdr);
7420         if (status)
7421                 goto out;
7422         status = decode_sequence(xdr, &res->seq_res, rqstp);
7423         if (status)
7424                 goto out;
7425         status = decode_putfh(xdr);
7426         if (status)
7427                 goto out;
7428         status = decode_layoutreturn(xdr, res);
7429 out:
7430         return status;
7431 }
7432
7433 /*
7434  * Decode LAYOUTCOMMIT response
7435  */
7436 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7437                                      struct xdr_stream *xdr,
7438                                      void *data)
7439 {
7440         struct nfs4_layoutcommit_res *res = data;
7441         struct compound_hdr hdr;
7442         int status;
7443
7444         status = decode_compound_hdr(xdr, &hdr);
7445         if (status)
7446                 goto out;
7447         status = decode_sequence(xdr, &res->seq_res, rqstp);
7448         if (status)
7449                 goto out;
7450         status = decode_putfh(xdr);
7451         if (status)
7452                 goto out;
7453         status = decode_layoutcommit(xdr, rqstp, res);
7454         if (status)
7455                 goto out;
7456         decode_getfattr(xdr, res->fattr, res->server);
7457 out:
7458         return status;
7459 }
7460
7461 /*
7462  * Decode SECINFO_NO_NAME response
7463  */
7464 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7465                                         struct xdr_stream *xdr,
7466                                         void *data)
7467 {
7468         struct nfs4_secinfo_res *res = data;
7469         struct compound_hdr hdr;
7470         int status;
7471
7472         status = decode_compound_hdr(xdr, &hdr);
7473         if (status)
7474                 goto out;
7475         status = decode_sequence(xdr, &res->seq_res, rqstp);
7476         if (status)
7477                 goto out;
7478         status = decode_putrootfh(xdr);
7479         if (status)
7480                 goto out;
7481         status = decode_secinfo_no_name(xdr, res);
7482 out:
7483         return status;
7484 }
7485
7486 /*
7487  * Decode TEST_STATEID response
7488  */
7489 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7490                                      struct xdr_stream *xdr,
7491                                      void *data)
7492 {
7493         struct nfs41_test_stateid_res *res = data;
7494         struct compound_hdr hdr;
7495         int status;
7496
7497         status = decode_compound_hdr(xdr, &hdr);
7498         if (status)
7499                 goto out;
7500         status = decode_sequence(xdr, &res->seq_res, rqstp);
7501         if (status)
7502                 goto out;
7503         status = decode_test_stateid(xdr, res);
7504 out:
7505         return status;
7506 }
7507
7508 /*
7509  * Decode FREE_STATEID response
7510  */
7511 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7512                                      struct xdr_stream *xdr,
7513                                      void *data)
7514 {
7515         struct nfs41_free_stateid_res *res = data;
7516         struct compound_hdr hdr;
7517         int status;
7518
7519         status = decode_compound_hdr(xdr, &hdr);
7520         if (status)
7521                 goto out;
7522         status = decode_sequence(xdr, &res->seq_res, rqstp);
7523         if (status)
7524                 goto out;
7525         status = decode_free_stateid(xdr, res);
7526 out:
7527         return status;
7528 }
7529 #endif /* CONFIG_NFS_V4_1 */
7530
7531 /**
7532  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7533  *                      the local page cache.
7534  * @xdr: XDR stream where entry resides
7535  * @entry: buffer to fill in with entry data
7536  * @plus: boolean indicating whether this should be a readdirplus entry
7537  *
7538  * Returns zero if successful, otherwise a negative errno value is
7539  * returned.
7540  *
7541  * This function is not invoked during READDIR reply decoding, but
7542  * rather whenever an application invokes the getdents(2) system call
7543  * on a directory already in our cache.
7544  */
7545 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7546                        bool plus)
7547 {
7548         unsigned int savep;
7549         uint32_t bitmap[3] = {0};
7550         uint32_t len;
7551         uint64_t new_cookie;
7552         __be32 *p = xdr_inline_decode(xdr, 4);
7553         if (unlikely(!p))
7554                 return -EAGAIN;
7555         if (*p == xdr_zero) {
7556                 p = xdr_inline_decode(xdr, 4);
7557                 if (unlikely(!p))
7558                         return -EAGAIN;
7559                 if (*p == xdr_zero)
7560                         return -EAGAIN;
7561                 entry->eof = 1;
7562                 return -EBADCOOKIE;
7563         }
7564
7565         p = xdr_inline_decode(xdr, 12);
7566         if (unlikely(!p))
7567                 return -EAGAIN;
7568         p = xdr_decode_hyper(p, &new_cookie);
7569         entry->len = be32_to_cpup(p);
7570
7571         p = xdr_inline_decode(xdr, entry->len);
7572         if (unlikely(!p))
7573                 return -EAGAIN;
7574         entry->name = (const char *) p;
7575
7576         /*
7577          * In case the server doesn't return an inode number,
7578          * we fake one here.  (We don't use inode number 0,
7579          * since glibc seems to choke on it...)
7580          */
7581         entry->ino = 1;
7582         entry->fattr->valid = 0;
7583
7584         if (decode_attr_bitmap(xdr, bitmap) < 0)
7585                 return -EAGAIN;
7586
7587         if (decode_attr_length(xdr, &len, &savep) < 0)
7588                 return -EAGAIN;
7589
7590         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7591                         NULL, entry->server) < 0)
7592                 return -EAGAIN;
7593         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7594                 entry->ino = entry->fattr->mounted_on_fileid;
7595         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7596                 entry->ino = entry->fattr->fileid;
7597
7598         entry->d_type = DT_UNKNOWN;
7599         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7600                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7601
7602         entry->cookie = new_cookie;
7603
7604         return 0;
7605 }
7606
7607 #ifdef CONFIG_NFS_V4_2
7608 #include "nfs42xdr.c"
7609 #endif /* CONFIG_NFS_V4_2 */
7610
7611 #define PROC(proc, argtype, restype)                            \
7612 [NFSPROC4_CLNT_##proc] = {                                      \
7613         .p_proc   = NFSPROC4_COMPOUND,                          \
7614         .p_encode = nfs4_xdr_##argtype,                         \
7615         .p_decode = nfs4_xdr_##restype,                         \
7616         .p_arglen = NFS4_##argtype##_sz,                        \
7617         .p_replen = NFS4_##restype##_sz,                        \
7618         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7619         .p_name   = #proc,                                      \
7620 }
7621
7622 #define STUB(proc)              \
7623 [NFSPROC4_CLNT_##proc] = {      \
7624         .p_name = #proc,        \
7625 }
7626
7627 #if defined(CONFIG_NFS_V4_1)
7628 #define PROC41(proc, argtype, restype)                          \
7629         PROC(proc, argtype, restype)
7630 #else
7631 #define PROC41(proc, argtype, restype)                          \
7632         STUB(proc)
7633 #endif
7634
7635 #if defined(CONFIG_NFS_V4_2)
7636 #define PROC42(proc, argtype, restype)                          \
7637         PROC(proc, argtype, restype)
7638 #else
7639 #define PROC42(proc, argtype, restype)                          \
7640         STUB(proc)
7641 #endif
7642
7643 const struct rpc_procinfo nfs4_procedures[] = {
7644         PROC(READ,              enc_read,               dec_read),
7645         PROC(WRITE,             enc_write,              dec_write),
7646         PROC(COMMIT,            enc_commit,             dec_commit),
7647         PROC(OPEN,              enc_open,               dec_open),
7648         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7649         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7650         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7651         PROC(CLOSE,             enc_close,              dec_close),
7652         PROC(SETATTR,           enc_setattr,            dec_setattr),
7653         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7654         PROC(RENEW,             enc_renew,              dec_renew),
7655         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7656         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7657         PROC(LOCK,              enc_lock,               dec_lock),
7658         PROC(LOCKT,             enc_lockt,              dec_lockt),
7659         PROC(LOCKU,             enc_locku,              dec_locku),
7660         PROC(ACCESS,            enc_access,             dec_access),
7661         PROC(GETATTR,           enc_getattr,            dec_getattr),
7662         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7663         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7664         PROC(REMOVE,            enc_remove,             dec_remove),
7665         PROC(RENAME,            enc_rename,             dec_rename),
7666         PROC(LINK,              enc_link,               dec_link),
7667         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7668         PROC(CREATE,            enc_create,             dec_create),
7669         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7670         PROC(STATFS,            enc_statfs,             dec_statfs),
7671         PROC(READLINK,          enc_readlink,           dec_readlink),
7672         PROC(READDIR,           enc_readdir,            dec_readdir),
7673         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7674         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7675         PROC(GETACL,            enc_getacl,             dec_getacl),
7676         PROC(SETACL,            enc_setacl,             dec_setacl),
7677         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7678         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7679         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7680         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7681         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7682         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7683         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7684         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7685         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7686         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7687         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7688         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7689         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7690         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7691         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7692         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7693         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7694         STUB(GETDEVICELIST),
7695         PROC41(BIND_CONN_TO_SESSION,
7696                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7697         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7698         PROC42(SEEK,            enc_seek,               dec_seek),
7699         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7700         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7701         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7702         PROC42(CLONE,           enc_clone,              dec_clone),
7703         PROC42(COPY,            enc_copy,               dec_copy),
7704         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7705         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7706         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7707         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7708         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7709         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7710         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7711         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7712         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7713 };
7714
7715 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7716 const struct rpc_version nfs_version4 = {
7717         .number                 = 4,
7718         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7719         .procs                  = nfs4_procedures,
7720         .counts                 = nfs_version4_counts,
7721 };