fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55
  56 #include "nfs4_fs.h"
  57 #include "nfs4trace.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 struct compound_hdr;
  70 static int nfs4_stat_to_errno(int);
  71 static void encode_layoutget(struct xdr_stream *xdr,
  72                              const struct nfs4_layoutget_args *args,
  73                              struct compound_hdr *hdr);
  74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  75                              struct nfs4_layoutget_res *res);
  76
  77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  78 #ifdef DEBUG
  79 #define NFS4_MAXTAGLEN          20
  80 #else
  81 #define NFS4_MAXTAGLEN          0
  82 #endif
  83
  84 /* lock,open owner id:
  85  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  86  */
  87 #define pagepad_maxsz           (1)
  88 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  89 #define lock_owner_id_maxsz     (1 + 1 + 4)
  90 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  91 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  93 #define op_encode_hdr_maxsz     (1)
  94 #define op_decode_hdr_maxsz     (2)
  95 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  97 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  99 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
 100                                 (NFS4_FHSIZE >> 2))
 101 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 102 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 103 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 104 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 105 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 106                                 ((3+NFS4_FHSIZE) >> 2))
 107 #define nfs4_fattr_bitmap_maxsz 4
 108 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 109 #define nfstime4_maxsz          (3)
 110 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 111 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 112 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 114 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 115 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 116 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 117 #else
 118 #define nfs4_label_maxsz        0
 119 #endif
 120 /* We support only one layout type per file system */
 121 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 122 /* This is based on getfattr, which uses the most attributes: */
 123 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 124                                 3*nfstime4_maxsz + \
 125                                 nfs4_owner_maxsz + \
 126                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 127                                  decode_mdsthreshold_maxsz))
 128 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 129                                 nfs4_fattr_value_maxsz)
 130 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 131 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 132                                  1 + 2 + 1 + \
 133                                 nfs4_owner_maxsz + \
 134                                 nfs4_group_maxsz + \
 135                                 nfs4_label_maxsz + \
 136                                 1 + nfstime4_maxsz + \
 137                                 1 + nfstime4_maxsz)
 138 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 139 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 140 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 141 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 142 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 143 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 144  * layout types will be returned.
 145  */
 146 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 147                                  nfs4_fattr_bitmap_maxsz + 1 + \
 148                                  1 /* lease time */ + \
 149                                  2 /* max filesize */ + \
 150                                  2 /* max read */ + \
 151                                  2 /* max write */ + \
 152                                  nfstime4_maxsz /* time delta */ + \
 153                                  5 /* fs layout types */ + \
 154                                  1 /* layout blksize */ + \
 155                                  1 /* clone blksize */ + \
 156                                  1 /* change attr type */ + \
 157                                  1 /* xattr support */)
 158 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 159 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 160 #define encode_setclientid_maxsz \
 161                                 (op_encode_hdr_maxsz + \
 162                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 163                                 /* client name */ \
 164                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 165                                 1 /* sc_prog */ + \
 166                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 167                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 168                                 1) /* sc_cb_ident */
 169 #define decode_setclientid_maxsz \
 170                                 (op_decode_hdr_maxsz + \
 171                                 2 /* clientid */ + \
 172                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 173                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 174                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 175 #define encode_setclientid_confirm_maxsz \
 176                                 (op_encode_hdr_maxsz + \
 177                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 178 #define decode_setclientid_confirm_maxsz \
 179                                 (op_decode_hdr_maxsz)
 180 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 181 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 182 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 183 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 184 #define encode_share_access_maxsz \
 185                                 (2)
 186 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 187 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 188 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 189 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 190                                 2 + encode_share_access_maxsz + 2 + \
 191                                 open_owner_id_maxsz + \
 192                                 encode_opentype_maxsz + \
 193                                 encode_claim_null_maxsz)
 194 #define decode_space_limit_maxsz        (3)
 195 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 196 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 197                                 decode_space_limit_maxsz + \
 198                                 decode_ace_maxsz)
 199 #define decode_change_info_maxsz        (5)
 200 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 201                                 decode_stateid_maxsz + \
 202                                 decode_change_info_maxsz + 1 + \
 203                                 nfs4_fattr_bitmap_maxsz + \
 204                                 decode_delegation_maxsz)
 205 #define encode_open_confirm_maxsz \
 206                                 (op_encode_hdr_maxsz + \
 207                                  encode_stateid_maxsz + 1)
 208 #define decode_open_confirm_maxsz \
 209                                 (op_decode_hdr_maxsz + \
 210                                  decode_stateid_maxsz)
 211 #define encode_open_downgrade_maxsz \
 212                                 (op_encode_hdr_maxsz + \
 213                                  encode_stateid_maxsz + 1 + \
 214                                  encode_share_access_maxsz)
 215 #define decode_open_downgrade_maxsz \
 216                                 (op_decode_hdr_maxsz + \
 217                                  decode_stateid_maxsz)
 218 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 219                                  1 + encode_stateid_maxsz)
 220 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 221                                  decode_stateid_maxsz)
 222 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 223                                  encode_stateid_maxsz + \
 224                                  encode_attrs_maxsz)
 225 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 226                                  nfs4_fattr_bitmap_maxsz)
 227 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 228                                  encode_stateid_maxsz + 3)
 229 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + pagepad_maxsz)
 230 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 231                                  2 + encode_verifier_maxsz + 5 + \
 232                                 nfs4_label_maxsz)
 233 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 234                                  decode_verifier_maxsz + pagepad_maxsz)
 235 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 236 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
 237 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 238                                  encode_stateid_maxsz + 4)
 239 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 240                                  2 + decode_verifier_maxsz)
 241 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 242 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 243                                  decode_verifier_maxsz)
 244 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 245                                 nfs4_name_maxsz)
 246 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 247                                  decode_change_info_maxsz)
 248 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 249                                 2 * nfs4_name_maxsz)
 250 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 251                                  decode_change_info_maxsz + \
 252                                  decode_change_info_maxsz)
 253 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 254                                 nfs4_name_maxsz)
 255 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 256 #define encode_lockowner_maxsz  (7)
 257 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 258                                  7 + \
 259                                  1 + encode_stateid_maxsz + 1 + \
 260                                  encode_lockowner_maxsz)
 261 #define decode_lock_denied_maxsz \
 262                                 (8 + decode_lockowner_maxsz)
 263 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 264                                  decode_lock_denied_maxsz)
 265 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 266                                 encode_lockowner_maxsz)
 267 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 268                                  decode_lock_denied_maxsz)
 269 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 270                                  encode_stateid_maxsz + \
 271                                  4)
 272 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 273                                  decode_stateid_maxsz)
 274 #define encode_release_lockowner_maxsz \
 275                                 (op_encode_hdr_maxsz + \
 276                                  encode_lockowner_maxsz)
 277 #define decode_release_lockowner_maxsz \
 278                                 (op_decode_hdr_maxsz)
 279 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 280 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 281 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 282                                 1 + nfs4_name_maxsz + \
 283                                 1 + \
 284                                 nfs4_fattr_maxsz)
 285 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 286 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 287                                 1 + 2 + nfs4_name_maxsz + \
 288                                 encode_attrs_maxsz)
 289 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 290                                 decode_change_info_maxsz + \
 291                                 nfs4_fattr_bitmap_maxsz)
 292 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 293 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 294 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 295 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 296 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 297 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 298                                  nfs4_fattr_bitmap_maxsz + 1 + pagepad_maxsz)
 299 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 300                                  encode_stateid_maxsz + 3)
 301 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 302 #define encode_fs_locations_maxsz \
 303                                 (encode_getattr_maxsz)
 304 #define decode_fs_locations_maxsz \
 305                                 (pagepad_maxsz)
 306 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 307 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 308
 309 #if defined(CONFIG_NFS_V4_1)
 310 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 311 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 312                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 313
 314 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 315                                 encode_verifier_maxsz + \
 316                                 1 /* co_ownerid.len */ + \
 317                                 /* eia_clientowner */ \
 318                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 1 /* flags */ + \
 320                                 1 /* spa_how */ + \
 321                                 /* max is SP4_MACH_CRED (for now) */ + \
 322                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 323                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 324                                 1 /* implementation id array of size 1 */ + \
 325                                 1 /* nii_domain */ + \
 326                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 327                                 1 /* nii_name */ + \
 328                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 329                                 3 /* nii_date */)
 330 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 331                                 2 /* eir_clientid */ + \
 332                                 1 /* eir_sequenceid */ + \
 333                                 1 /* eir_flags */ + \
 334                                 1 /* spr_how */ + \
 335                                   /* max is SP4_MACH_CRED (for now) */ + \
 336                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 337                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 338                                 2 /* eir_server_owner.so_minor_id */ + \
 339                                 /* eir_server_owner.so_major_id<> */ \
 340                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 341                                 /* eir_server_scope<> */ \
 342                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 343                                 1 /* eir_server_impl_id array length */ + \
 344                                 1 /* nii_domain */ + \
 345                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 346                                 1 /* nii_name */ + \
 347                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 348                                 3 /* nii_date */)
 349 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 350 #define decode_channel_attrs_maxsz  (6 + \
 351                                      1 /* ca_rdma_ird.len */ + \
 352                                      1 /* ca_rdma_ird */)
 353 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 354                                      2 /* csa_clientid */ + \
 355                                      1 /* csa_sequence */ + \
 356                                      1 /* csa_flags */ + \
 357                                      encode_channel_attrs_maxsz + \
 358                                      encode_channel_attrs_maxsz + \
 359                                      1 /* csa_cb_program */ + \
 360                                      1 /* csa_sec_parms.len (1) */ + \
 361                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 362                                      1 /* stamp */ + \
 363                                      1 /* machinename.len */ + \
 364                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 365                                      1 /* uid */ + \
 366                                      1 /* gid */ + \
 367                                      1 /* gids.len (0) */)
 368 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 369                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 370                                      1 /* csr_sequence */ + \
 371                                      1 /* csr_flags */ + \
 372                                      decode_channel_attrs_maxsz + \
 373                                      decode_channel_attrs_maxsz)
 374 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 375                                      /* bctsa_sessid */ \
 376                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 377                                      1 /* bctsa_dir */ + \
 378                                      1 /* bctsa_use_conn_in_rdma_mode */)
 379 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 380                                      /* bctsr_sessid */ \
 381                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 382                                      1 /* bctsr_dir */ + \
 383                                      1 /* bctsr_use_conn_in_rdma_mode */)
 384 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 385 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 386 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 387 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 388 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 389                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 390 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 391                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 392 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 393 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 394 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 395                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 396                                 1 /* layout type */ + \
 397                                 1 /* maxcount */ + \
 398                                 1 /* bitmap size */ + \
 399                                 1 /* notification bitmap length */ + \
 400                                 1 /* notification bitmap, word 0 */)
 401 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 402                                 1 /* layout type */ + \
 403                                 1 /* opaque devaddr4 length */ + \
 404                                   /* devaddr4 payload is read into page */ \
 405                                 1 /* notification bitmap length */ + \
 406                                 1 /* notification bitmap, word 0 */ + \
 407                                 pagepad_maxsz /* possible XDR padding */)
 408 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 409                                 encode_stateid_maxsz)
 410 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 411                                 decode_stateid_maxsz + \
 412                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + \
 413                                 pagepad_maxsz)
 414 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 415                                 2 /* offset */ + \
 416                                 2 /* length */ + \
 417                                 1 /* reclaim */ + \
 418                                 encode_stateid_maxsz + \
 419                                 1 /* new offset (true) */ + \
 420                                 2 /* last byte written */ + \
 421                                 1 /* nt_timechanged (false) */ + \
 422                                 1 /* layoutupdate4 layout type */ + \
 423                                 1 /* layoutupdate4 opaqueue len */)
 424                                   /* the actual content of layoutupdate4 should
 425                                      be allocated by drivers and spliced in
 426                                      using xdr_write_pages */
 427 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 428 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 429                                 encode_stateid_maxsz + \
 430                                 1 + \
 431                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 432 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 433                                 1 + decode_stateid_maxsz)
 434 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 435 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 436 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 437                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 438 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 439 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 440                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 441 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 442 #else /* CONFIG_NFS_V4_1 */
 443 #define encode_sequence_maxsz   0
 444 #define decode_sequence_maxsz   0
 445 #define encode_layoutreturn_maxsz 0
 446 #define decode_layoutreturn_maxsz 0
 447 #define encode_layoutget_maxsz  0
 448 #define decode_layoutget_maxsz  0
 449 #endif /* CONFIG_NFS_V4_1 */
 450
 451 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 452 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 453 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 454                                 encode_sequence_maxsz + \
 455                                 encode_putfh_maxsz + \
 456                                 encode_read_maxsz)
 457 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 458                                 decode_sequence_maxsz + \
 459                                 decode_putfh_maxsz + \
 460                                 decode_read_maxsz)
 461 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_readlink_maxsz)
 465 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_readlink_maxsz)
 469 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 470                                 encode_sequence_maxsz + \
 471                                 encode_putfh_maxsz + \
 472                                 encode_readdir_maxsz)
 473 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 474                                 decode_sequence_maxsz + \
 475                                 decode_putfh_maxsz + \
 476                                 decode_readdir_maxsz)
 477 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 478                                 encode_sequence_maxsz + \
 479                                 encode_putfh_maxsz + \
 480                                 encode_write_maxsz + \
 481                                 encode_getattr_maxsz)
 482 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 483                                 decode_sequence_maxsz + \
 484                                 decode_putfh_maxsz + \
 485                                 decode_write_maxsz + \
 486                                 decode_getattr_maxsz)
 487 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 488                                 encode_sequence_maxsz + \
 489                                 encode_putfh_maxsz + \
 490                                 encode_commit_maxsz)
 491 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_commit_maxsz)
 495 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 496                                 encode_sequence_maxsz + \
 497                                 encode_putfh_maxsz + \
 498                                 encode_open_maxsz + \
 499                                 encode_access_maxsz + \
 500                                 encode_getfh_maxsz + \
 501                                 encode_getattr_maxsz + \
 502                                 encode_layoutget_maxsz)
 503 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 504                                 decode_sequence_maxsz + \
 505                                 decode_putfh_maxsz + \
 506                                 decode_open_maxsz + \
 507                                 decode_access_maxsz + \
 508                                 decode_getfh_maxsz + \
 509                                 decode_getattr_maxsz + \
 510                                 decode_layoutget_maxsz)
 511 #define NFS4_enc_open_confirm_sz \
 512                                 (compound_encode_hdr_maxsz + \
 513                                  encode_putfh_maxsz + \
 514                                  encode_open_confirm_maxsz)
 515 #define NFS4_dec_open_confirm_sz \
 516                                 (compound_decode_hdr_maxsz + \
 517                                  decode_putfh_maxsz + \
 518                                  decode_open_confirm_maxsz)
 519 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 520                                         encode_sequence_maxsz + \
 521                                         encode_putfh_maxsz + \
 522                                         encode_open_maxsz + \
 523                                         encode_access_maxsz + \
 524                                         encode_getattr_maxsz + \
 525                                         encode_layoutget_maxsz)
 526 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 527                                         decode_sequence_maxsz + \
 528                                         decode_putfh_maxsz + \
 529                                         decode_open_maxsz + \
 530                                         decode_access_maxsz + \
 531                                         decode_getattr_maxsz + \
 532                                         decode_layoutget_maxsz)
 533 #define NFS4_enc_open_downgrade_sz \
 534                                 (compound_encode_hdr_maxsz + \
 535                                  encode_sequence_maxsz + \
 536                                  encode_putfh_maxsz + \
 537                                  encode_layoutreturn_maxsz + \
 538                                  encode_open_downgrade_maxsz)
 539 #define NFS4_dec_open_downgrade_sz \
 540                                 (compound_decode_hdr_maxsz + \
 541                                  decode_sequence_maxsz + \
 542                                  decode_putfh_maxsz + \
 543                                  decode_layoutreturn_maxsz + \
 544                                  decode_open_downgrade_maxsz)
 545 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 546                                  encode_sequence_maxsz + \
 547                                  encode_putfh_maxsz + \
 548                                  encode_layoutreturn_maxsz + \
 549                                  encode_close_maxsz + \
 550                                  encode_getattr_maxsz)
 551 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 552                                  decode_sequence_maxsz + \
 553                                  decode_putfh_maxsz + \
 554                                  decode_layoutreturn_maxsz + \
 555                                  decode_close_maxsz + \
 556                                  decode_getattr_maxsz)
 557 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 558                                  encode_sequence_maxsz + \
 559                                  encode_putfh_maxsz + \
 560                                  encode_setattr_maxsz + \
 561                                  encode_getattr_maxsz)
 562 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 563                                  decode_sequence_maxsz + \
 564                                  decode_putfh_maxsz + \
 565                                  decode_setattr_maxsz + \
 566                                  decode_getattr_maxsz)
 567 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_fsinfo_maxsz)
 571 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 572                                 decode_sequence_maxsz + \
 573                                 decode_putfh_maxsz + \
 574                                 decode_fsinfo_maxsz)
 575 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 576                                 encode_renew_maxsz)
 577 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 578                                 decode_renew_maxsz)
 579 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 580                                 encode_setclientid_maxsz)
 581 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 582                                 decode_setclientid_maxsz)
 583 #define NFS4_enc_setclientid_confirm_sz \
 584                                 (compound_encode_hdr_maxsz + \
 585                                 encode_setclientid_confirm_maxsz)
 586 #define NFS4_dec_setclientid_confirm_sz \
 587                                 (compound_decode_hdr_maxsz + \
 588                                 decode_setclientid_confirm_maxsz)
 589 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_lock_maxsz)
 593 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 594                                 decode_sequence_maxsz + \
 595                                 decode_putfh_maxsz + \
 596                                 decode_lock_maxsz)
 597 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putfh_maxsz + \
 600                                 encode_lockt_maxsz)
 601 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 602                                  decode_sequence_maxsz + \
 603                                  decode_putfh_maxsz + \
 604                                  decode_lockt_maxsz)
 605 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 606                                 encode_sequence_maxsz + \
 607                                 encode_putfh_maxsz + \
 608                                 encode_locku_maxsz)
 609 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_locku_maxsz)
 613 #define NFS4_enc_release_lockowner_sz \
 614                                 (compound_encode_hdr_maxsz + \
 615                                  encode_lockowner_maxsz)
 616 #define NFS4_dec_release_lockowner_sz \
 617                                 (compound_decode_hdr_maxsz + \
 618                                  decode_lockowner_maxsz)
 619 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_access_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_access_maxsz + \
 628                                 decode_getattr_maxsz)
 629 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_getattr_maxsz + \
 633                                 encode_renew_maxsz)
 634 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 635                                 decode_sequence_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_getattr_maxsz + \
 638                                 decode_renew_maxsz)
 639 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_lookup_maxsz + \
 643                                 encode_getattr_maxsz + \
 644                                 encode_getfh_maxsz)
 645 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_lookup_maxsz + \
 649                                 decode_getattr_maxsz + \
 650                                 decode_getfh_maxsz)
 651 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_lookupp_maxsz + \
 655                                 encode_getattr_maxsz + \
 656                                 encode_getfh_maxsz)
 657 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 658                                 decode_sequence_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_lookupp_maxsz + \
 661                                 decode_getattr_maxsz + \
 662                                 decode_getfh_maxsz)
 663 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 664                                 encode_sequence_maxsz + \
 665                                 encode_putrootfh_maxsz + \
 666                                 encode_getattr_maxsz + \
 667                                 encode_getfh_maxsz)
 668 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 669                                 decode_sequence_maxsz + \
 670                                 decode_putrootfh_maxsz + \
 671                                 decode_getattr_maxsz + \
 672                                 decode_getfh_maxsz)
 673 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 674                                 encode_sequence_maxsz + \
 675                                 encode_putfh_maxsz + \
 676                                 encode_remove_maxsz)
 677 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 678                                 decode_sequence_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_remove_maxsz)
 681 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_savefh_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_rename_maxsz)
 687 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_savefh_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_rename_maxsz)
 693 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_savefh_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_link_maxsz + \
 699                                 encode_restorefh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_savefh_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_link_maxsz + \
 707                                 decode_restorefh_maxsz + \
 708                                 decode_getattr_maxsz)
 709 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_symlink_maxsz + \
 713                                 encode_getattr_maxsz + \
 714                                 encode_getfh_maxsz)
 715 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 716                                 decode_sequence_maxsz + \
 717                                 decode_putfh_maxsz + \
 718                                 decode_symlink_maxsz + \
 719                                 decode_getattr_maxsz + \
 720                                 decode_getfh_maxsz)
 721 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_create_maxsz + \
 725                                 encode_getfh_maxsz + \
 726                                 encode_getattr_maxsz)
 727 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_create_maxsz + \
 731                                 decode_getfh_maxsz + \
 732                                 decode_getattr_maxsz)
 733 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 734                                 encode_sequence_maxsz + \
 735                                 encode_putfh_maxsz + \
 736                                 encode_getattr_maxsz)
 737 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 738                                 decode_sequence_maxsz + \
 739                                 decode_putfh_maxsz + \
 740                                 decode_getattr_maxsz)
 741 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 742                                 encode_sequence_maxsz + \
 743                                 encode_putfh_maxsz + \
 744                                 encode_statfs_maxsz)
 745 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 746                                 decode_sequence_maxsz + \
 747                                 decode_putfh_maxsz + \
 748                                 decode_statfs_maxsz)
 749 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 750                                 encode_sequence_maxsz + \
 751                                 encode_putfh_maxsz + \
 752                                 encode_getattr_maxsz)
 753 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 754                                 decode_sequence_maxsz + \
 755                                 decode_putfh_maxsz + \
 756                                 decode_getattr_maxsz)
 757 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_layoutreturn_maxsz + \
 761                                 encode_delegreturn_maxsz + \
 762                                 encode_getattr_maxsz)
 763 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 764                                 decode_sequence_maxsz + \
 765                                 decode_putfh_maxsz + \
 766                                 decode_layoutreturn_maxsz + \
 767                                 decode_delegreturn_maxsz + \
 768                                 decode_getattr_maxsz)
 769 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 770                                 encode_sequence_maxsz + \
 771                                 encode_putfh_maxsz + \
 772                                 encode_getacl_maxsz)
 773 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 774                                 decode_sequence_maxsz + \
 775                                 decode_putfh_maxsz + \
 776                                 decode_getacl_maxsz)
 777 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 778                                 encode_sequence_maxsz + \
 779                                 encode_putfh_maxsz + \
 780                                 encode_setacl_maxsz)
 781 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 782                                 decode_sequence_maxsz + \
 783                                 decode_putfh_maxsz + \
 784                                 decode_setacl_maxsz)
 785 #define NFS4_enc_fs_locations_sz \
 786                                 (compound_encode_hdr_maxsz + \
 787                                  encode_sequence_maxsz + \
 788                                  encode_putfh_maxsz + \
 789                                  encode_lookup_maxsz + \
 790                                  encode_fs_locations_maxsz + \
 791                                  encode_renew_maxsz)
 792 #define NFS4_dec_fs_locations_sz \
 793                                 (compound_decode_hdr_maxsz + \
 794                                  decode_sequence_maxsz + \
 795                                  decode_putfh_maxsz + \
 796                                  decode_lookup_maxsz + \
 797                                  decode_fs_locations_maxsz + \
 798                                  decode_renew_maxsz)
 799 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 800                                 encode_sequence_maxsz + \
 801                                 encode_putfh_maxsz + \
 802                                 encode_secinfo_maxsz)
 803 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 804                                 decode_sequence_maxsz + \
 805                                 decode_putfh_maxsz + \
 806                                 decode_secinfo_maxsz)
 807 #define NFS4_enc_fsid_present_sz \
 808                                 (compound_encode_hdr_maxsz + \
 809                                  encode_sequence_maxsz + \
 810                                  encode_putfh_maxsz + \
 811                                  encode_getfh_maxsz + \
 812                                  encode_renew_maxsz)
 813 #define NFS4_dec_fsid_present_sz \
 814                                 (compound_decode_hdr_maxsz + \
 815                                  decode_sequence_maxsz + \
 816                                  decode_putfh_maxsz + \
 817                                  decode_getfh_maxsz + \
 818                                  decode_renew_maxsz)
 819 #if defined(CONFIG_NFS_V4_1)
 820 #define NFS4_enc_bind_conn_to_session_sz \
 821                                 (compound_encode_hdr_maxsz + \
 822                                  encode_bind_conn_to_session_maxsz)
 823 #define NFS4_dec_bind_conn_to_session_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_bind_conn_to_session_maxsz)
 826 #define NFS4_enc_exchange_id_sz \
 827                                 (compound_encode_hdr_maxsz + \
 828                                  encode_exchange_id_maxsz)
 829 #define NFS4_dec_exchange_id_sz \
 830                                 (compound_decode_hdr_maxsz + \
 831                                  decode_exchange_id_maxsz)
 832 #define NFS4_enc_create_session_sz \
 833                                 (compound_encode_hdr_maxsz + \
 834                                  encode_create_session_maxsz)
 835 #define NFS4_dec_create_session_sz \
 836                                 (compound_decode_hdr_maxsz + \
 837                                  decode_create_session_maxsz)
 838 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 839                                          encode_destroy_session_maxsz)
 840 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 841                                          decode_destroy_session_maxsz)
 842 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 843                                          encode_destroy_clientid_maxsz)
 844 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 845                                          decode_destroy_clientid_maxsz)
 846 #define NFS4_enc_sequence_sz \
 847                                 (compound_decode_hdr_maxsz + \
 848                                  encode_sequence_maxsz)
 849 #define NFS4_dec_sequence_sz \
 850                                 (compound_decode_hdr_maxsz + \
 851                                  decode_sequence_maxsz)
 852 #endif
 853 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 854                                          encode_sequence_maxsz + \
 855                                          encode_putrootfh_maxsz + \
 856                                          encode_fsinfo_maxsz)
 857 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 858                                          decode_sequence_maxsz + \
 859                                          decode_putrootfh_maxsz + \
 860                                          decode_fsinfo_maxsz)
 861 #if defined(CONFIG_NFS_V4_1)
 862 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 863                                          encode_sequence_maxsz + \
 864                                          encode_reclaim_complete_maxsz)
 865 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 866                                          decode_sequence_maxsz + \
 867                                          decode_reclaim_complete_maxsz)
 868 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 869                                 encode_sequence_maxsz +\
 870                                 encode_getdeviceinfo_maxsz)
 871 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 872                                 decode_sequence_maxsz + \
 873                                 decode_getdeviceinfo_maxsz)
 874 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 875                                 encode_sequence_maxsz + \
 876                                 encode_putfh_maxsz +        \
 877                                 encode_layoutget_maxsz)
 878 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 879                                 decode_sequence_maxsz + \
 880                                 decode_putfh_maxsz +        \
 881                                 decode_layoutget_maxsz)
 882 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 883                                 encode_sequence_maxsz +\
 884                                 encode_putfh_maxsz + \
 885                                 encode_layoutcommit_maxsz + \
 886                                 encode_getattr_maxsz)
 887 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 888                                 decode_sequence_maxsz + \
 889                                 decode_putfh_maxsz + \
 890                                 decode_layoutcommit_maxsz + \
 891                                 decode_getattr_maxsz)
 892 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 893                                 encode_sequence_maxsz + \
 894                                 encode_putfh_maxsz + \
 895                                 encode_layoutreturn_maxsz)
 896 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 897                                 decode_sequence_maxsz + \
 898                                 decode_putfh_maxsz + \
 899                                 decode_layoutreturn_maxsz)
 900 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 901                                         encode_sequence_maxsz + \
 902                                         encode_putrootfh_maxsz +\
 903                                         encode_secinfo_no_name_maxsz)
 904 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 905                                         decode_sequence_maxsz + \
 906                                         decode_putrootfh_maxsz + \
 907                                         decode_secinfo_no_name_maxsz)
 908 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 909                                          encode_sequence_maxsz + \
 910                                          encode_test_stateid_maxsz)
 911 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 912                                          decode_sequence_maxsz + \
 913                                          decode_test_stateid_maxsz)
 914 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 915                                          encode_sequence_maxsz + \
 916                                          encode_free_stateid_maxsz)
 917 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 918                                          decode_sequence_maxsz + \
 919                                          decode_free_stateid_maxsz)
 920
 921 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 922                                       compound_encode_hdr_maxsz +
 923                                       encode_sequence_maxsz +
 924                                       encode_putfh_maxsz +
 925                                       encode_getattr_maxsz) *
 926                                      XDR_UNIT);
 927
 928 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 929                                      compound_decode_hdr_maxsz +
 930                                      decode_sequence_maxsz +
 931                                      decode_putfh_maxsz) *
 932                                     XDR_UNIT);
 933
 934 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 935                                            compound_decode_hdr_maxsz +
 936                                            decode_sequence_maxsz) *
 937                                           XDR_UNIT);
 938 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 939 #endif /* CONFIG_NFS_V4_1 */
 940
 941 static const umode_t nfs_type2fmt[] = {
 942         [NF4BAD] = 0,
 943         [NF4REG] = S_IFREG,
 944         [NF4DIR] = S_IFDIR,
 945         [NF4BLK] = S_IFBLK,
 946         [NF4CHR] = S_IFCHR,
 947         [NF4LNK] = S_IFLNK,
 948         [NF4SOCK] = S_IFSOCK,
 949         [NF4FIFO] = S_IFIFO,
 950         [NF4ATTRDIR] = 0,
 951         [NF4NAMEDATTR] = 0,
 952 };
 953
 954 struct compound_hdr {
 955         int32_t         status;
 956         uint32_t        nops;
 957         __be32 *        nops_p;
 958         uint32_t        taglen;
 959         char *          tag;
 960         uint32_t        replen;         /* expected reply words */
 961         u32             minorversion;
 962 };
 963
 964 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 965 {
 966         __be32 *p = xdr_reserve_space(xdr, nbytes);
 967         BUG_ON(!p);
 968         return p;
 969 }
 970
 971 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 972 {
 973         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 974 }
 975
 976 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 977 {
 978         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 979 }
 980
 981 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 982 {
 983         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 984 }
 985
 986 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 987 {
 988         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 989 }
 990
 991 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 992                 const __u32 *bitmap, size_t len)
 993 {
 994         ssize_t ret;
 995
 996         /* Trim empty words */
 997         while (len > 0 && bitmap[len-1] == 0)
 998                 len--;
 999         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
1000         if (WARN_ON_ONCE(ret < 0))
1001                 return ret;
1002         return len;
1003 }
1004
1005 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
1006                 __u32 *res, size_t len)
1007 {
1008         size_t i;
1009         __u32 tmp;
1010
1011         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1012                 len--;
1013         for (i = len; i-- > 0;) {
1014                 tmp = bitmap[i] & mask[i];
1015                 res[i] = tmp;
1016         }
1017         return len;
1018 }
1019
1020 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1021                 const struct nfs_seqid *seqid)
1022 {
1023         if (seqid != NULL)
1024                 encode_uint32(xdr, seqid->sequence->counter);
1025         else
1026                 encode_uint32(xdr, 0);
1027 }
1028
1029 static void encode_compound_hdr(struct xdr_stream *xdr,
1030                                 struct rpc_rqst *req,
1031                                 struct compound_hdr *hdr)
1032 {
1033         __be32 *p;
1034
1035         /* initialize running count of expected bytes in reply.
1036          * NOTE: the replied tag SHOULD be the same is the one sent,
1037          * but this is not required as a MUST for the server to do so. */
1038         hdr->replen = 3 + hdr->taglen;
1039
1040         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1041         encode_string(xdr, hdr->taglen, hdr->tag);
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(hdr->minorversion);
1044         hdr->nops_p = p;
1045         *p = cpu_to_be32(hdr->nops);
1046 }
1047
1048 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1049                 uint32_t replen,
1050                 struct compound_hdr *hdr)
1051 {
1052         encode_uint32(xdr, op);
1053         hdr->nops++;
1054         hdr->replen += replen;
1055 }
1056
1057 static void encode_nops(struct compound_hdr *hdr)
1058 {
1059         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1060         *hdr->nops_p = htonl(hdr->nops);
1061 }
1062
1063 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1064 {
1065         encode_opaque_fixed(xdr, stateid, 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 (fl->fl_type == F_RDLCK)
1309                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1310         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1311 }
1312
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, 36);
1420         p = xdr_encode_hyper(p, arg->clientid);
1421         *p++ = cpu_to_be32(24);
1422         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1423         *p++ = cpu_to_be32(arg->server->s_dev);
1424         *p++ = cpu_to_be32(arg->id.uniquifier);
1425         xdr_encode_hyper(p, arg->id.create_time);
1426 }
1427
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, fmode_t delegation_type)
1472 {
1473         __be32 *p;
1474
1475         p = reserve_space(xdr, 4);
1476         switch (delegation_type) {
1477         case 0:
1478                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1479                 break;
1480         case FMODE_READ:
1481                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1482                 break;
1483         case FMODE_WRITE|FMODE_READ:
1484                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1485                 break;
1486         default:
1487                 BUG();
1488         }
1489 }
1490
1491 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 4);
1496         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1497         encode_string(xdr, name->len, name->name);
1498 }
1499
1500 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4);
1505         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1506         encode_delegation_type(xdr, type);
1507 }
1508
1509 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1510 {
1511         __be32 *p;
1512
1513         p = reserve_space(xdr, 4);
1514         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1515         encode_nfs4_stateid(xdr, stateid);
1516         encode_string(xdr, name->len, name->name);
1517 }
1518
1519 static inline void encode_claim_fh(struct xdr_stream *xdr)
1520 {
1521         __be32 *p;
1522
1523         p = reserve_space(xdr, 4);
1524         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1525 }
1526
1527 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1528 {
1529         __be32 *p;
1530
1531         p = reserve_space(xdr, 4);
1532         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1533         encode_nfs4_stateid(xdr, stateid);
1534 }
1535
1536 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1539         encode_openhdr(xdr, arg);
1540         encode_opentype(xdr, arg);
1541         switch (arg->claim) {
1542         case NFS4_OPEN_CLAIM_NULL:
1543                 encode_claim_null(xdr, arg->name);
1544                 break;
1545         case NFS4_OPEN_CLAIM_PREVIOUS:
1546                 encode_claim_previous(xdr, arg->u.delegation_type);
1547                 break;
1548         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1549                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1550                 break;
1551         case NFS4_OPEN_CLAIM_FH:
1552                 encode_claim_fh(xdr);
1553                 break;
1554         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1556                 break;
1557         default:
1558                 BUG();
1559         }
1560 }
1561
1562 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1563 {
1564         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1565         encode_nfs4_stateid(xdr, arg->stateid);
1566         encode_nfs4_seqid(xdr, arg->seqid);
1567 }
1568
1569 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1570 {
1571         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1572         encode_nfs4_stateid(xdr, &arg->stateid);
1573         encode_nfs4_seqid(xdr, arg->seqid);
1574         encode_share_access(xdr, arg->share_access);
1575 }
1576
1577 static void
1578 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1579 {
1580         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1581         encode_string(xdr, fh->size, fh->data);
1582 }
1583
1584 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1585 {
1586         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1587 }
1588
1589 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1590                         struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1595         encode_nfs4_stateid(xdr, &args->stateid);
1596
1597         p = reserve_space(xdr, 12);
1598         p = xdr_encode_hyper(p, args->offset);
1599         *p = cpu_to_be32(args->count);
1600 }
1601
1602 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1603 {
1604         uint32_t attrs[3] = {
1605                 FATTR4_WORD0_RDATTR_ERROR,
1606                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1607         };
1608         uint32_t dircount = readdir->count >> 1;
1609         __be32 *p, verf[2];
1610         uint32_t attrlen = 0;
1611         unsigned int i;
1612
1613         if (readdir->plus) {
1614                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1615                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1616                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1617                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1618                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1619                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1620                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1621                 dircount >>= 1;
1622         }
1623         /* Use mounted_on_fileid only if the server supports it */
1624         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1625                 attrs[0] |= FATTR4_WORD0_FILEID;
1626         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1627                 attrs[i] &= readdir->bitmask[i];
1628                 if (attrs[i] != 0)
1629                         attrlen = i+1;
1630         }
1631
1632         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1633         encode_uint64(xdr, readdir->cookie);
1634         encode_nfs4_verifier(xdr, &readdir->verifier);
1635         p = reserve_space(xdr, 12 + (attrlen << 2));
1636         *p++ = cpu_to_be32(dircount);
1637         *p++ = cpu_to_be32(readdir->count);
1638         *p++ = cpu_to_be32(attrlen);
1639         for (i = 0; i < attrlen; i++)
1640                 *p++ = cpu_to_be32(attrs[i]);
1641         memcpy(verf, readdir->verifier.data, sizeof(verf));
1642
1643         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1644                         __func__,
1645                         (unsigned long long)readdir->cookie,
1646                         verf[0], verf[1],
1647                         attrs[0] & readdir->bitmask[0],
1648                         attrs[1] & readdir->bitmask[1],
1649                         attrs[2] & readdir->bitmask[2]);
1650 }
1651
1652 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1653 {
1654         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1655 }
1656
1657 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1660         encode_string(xdr, name->len, name->name);
1661 }
1662
1663 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1664 {
1665         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1666         encode_string(xdr, oldname->len, oldname->name);
1667         encode_string(xdr, newname->len, newname->name);
1668 }
1669
1670 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1671                          struct compound_hdr *hdr)
1672 {
1673         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1674         encode_uint64(xdr, clid);
1675 }
1676
1677 static void
1678 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1681 }
1682
1683 static void
1684 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1685                 struct compound_hdr *hdr)
1686 {
1687         __be32 *p;
1688
1689         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1690         encode_nfs4_stateid(xdr, &zero_stateid);
1691         p = reserve_space(xdr, 2*4);
1692         *p++ = cpu_to_be32(1);
1693         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1694         p = reserve_space(xdr, 4);
1695         *p = cpu_to_be32(arg->acl_len);
1696         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1697 }
1698
1699 static void
1700 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1701 {
1702         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1703 }
1704
1705 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1706 {
1707         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1708         encode_nfs4_stateid(xdr, &arg->stateid);
1709         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1710                         server->attr_bitmask);
1711 }
1712
1713 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1714 {
1715         __be32 *p;
1716
1717         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1718         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1719
1720         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1721                         setclientid->sc_clnt->cl_owner_id);
1722         p = reserve_space(xdr, 4);
1723         *p = cpu_to_be32(setclientid->sc_prog);
1724         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1725         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1726         p = reserve_space(xdr, 4);
1727         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1728 }
1729
1730 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1731 {
1732         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1733                         decode_setclientid_confirm_maxsz, hdr);
1734         encode_uint64(xdr, arg->clientid);
1735         encode_nfs4_verifier(xdr, &arg->confirm);
1736 }
1737
1738 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1739                          struct compound_hdr *hdr)
1740 {
1741         __be32 *p;
1742
1743         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1744         encode_nfs4_stateid(xdr, &args->stateid);
1745
1746         p = reserve_space(xdr, 16);
1747         p = xdr_encode_hyper(p, args->offset);
1748         *p++ = cpu_to_be32(args->stable);
1749         *p = cpu_to_be32(args->count);
1750
1751         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1752 }
1753
1754 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1755 {
1756         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1757         encode_nfs4_stateid(xdr, stateid);
1758 }
1759
1760 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1761 {
1762         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1763         encode_string(xdr, name->len, name->name);
1764 }
1765
1766 #if defined(CONFIG_NFS_V4_1)
1767 /* NFSv4.1 operations */
1768 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1769                                    const struct nfs41_bind_conn_to_session_args *args,
1770                                    struct compound_hdr *hdr)
1771 {
1772         __be32 *p;
1773
1774         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1775                 decode_bind_conn_to_session_maxsz, hdr);
1776         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1777         p = xdr_reserve_space(xdr, 8);
1778         *p++ = cpu_to_be32(args->dir);
1779         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1780 }
1781
1782 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1783 {
1784         unsigned int i;
1785         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1786         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1787                 encode_uint32(xdr, op_map->u.words[i]);
1788 }
1789
1790 static void encode_exchange_id(struct xdr_stream *xdr,
1791                                const struct nfs41_exchange_id_args *args,
1792                                struct compound_hdr *hdr)
1793 {
1794         __be32 *p;
1795         char impl_name[IMPL_NAME_LIMIT];
1796         int len = 0;
1797
1798         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1799         encode_nfs4_verifier(xdr, &args->verifier);
1800
1801         encode_string(xdr, strlen(args->client->cl_owner_id),
1802                         args->client->cl_owner_id);
1803
1804         encode_uint32(xdr, args->flags);
1805         encode_uint32(xdr, args->state_protect.how);
1806
1807         switch (args->state_protect.how) {
1808         case SP4_NONE:
1809                 break;
1810         case SP4_MACH_CRED:
1811                 encode_op_map(xdr, &args->state_protect.enforce);
1812                 encode_op_map(xdr, &args->state_protect.allow);
1813                 break;
1814         default:
1815                 WARN_ON_ONCE(1);
1816                 break;
1817         }
1818
1819         if (send_implementation_id &&
1820             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1821             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1822                 <= sizeof(impl_name) + 1)
1823                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1824                                utsname()->sysname, utsname()->release,
1825                                utsname()->version, utsname()->machine);
1826
1827         if (len > 0) {
1828                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1829
1830                 encode_string(xdr,
1831                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1832                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1833                 encode_string(xdr, len, impl_name);
1834                 /* just send zeros for nii_date - the date is in nii_name */
1835                 p = reserve_space(xdr, 12);
1836                 p = xdr_encode_hyper(p, 0);
1837                 *p = cpu_to_be32(0);
1838         } else
1839                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1840 }
1841
1842 static void encode_create_session(struct xdr_stream *xdr,
1843                                   const struct nfs41_create_session_args *args,
1844                                   struct compound_hdr *hdr)
1845 {
1846         __be32 *p;
1847         struct nfs_client *clp = args->client;
1848         struct rpc_clnt *clnt = clp->cl_rpcclient;
1849         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1850         u32 max_resp_sz_cached;
1851
1852         /*
1853          * Assumes OPEN is the biggest non-idempotent compound.
1854          * 2 is the verifier.
1855          */
1856         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1857                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1858
1859         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1860         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1861         p = xdr_encode_hyper(p, args->clientid);
1862         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1863         *p++ = cpu_to_be32(args->flags);                        /*flags */
1864
1865         /* Fore Channel */
1866         *p++ = cpu_to_be32(0);                          /* header padding size */
1867         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1868         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1869         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1870         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1871         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1872         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1873
1874         /* Back Channel */
1875         *p++ = cpu_to_be32(0);                          /* header padding size */
1876         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1877         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1878         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1879         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1880         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1881         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1882
1883         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1884         *p++ = cpu_to_be32(1);
1885         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1886
1887         /* authsys_parms rfc1831 */
1888         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1889         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1890         *p++ = cpu_to_be32(0);                          /* UID */
1891         *p++ = cpu_to_be32(0);                          /* GID */
1892         *p = cpu_to_be32(0);                            /* No more gids */
1893 }
1894
1895 static void encode_destroy_session(struct xdr_stream *xdr,
1896                                    const struct nfs4_session *session,
1897                                    struct compound_hdr *hdr)
1898 {
1899         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1900         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1901 }
1902
1903 static void encode_destroy_clientid(struct xdr_stream *xdr,
1904                                    uint64_t clientid,
1905                                    struct compound_hdr *hdr)
1906 {
1907         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1908         encode_uint64(xdr, clientid);
1909 }
1910
1911 static void encode_reclaim_complete(struct xdr_stream *xdr,
1912                                     const struct nfs41_reclaim_complete_args *args,
1913                                     struct compound_hdr *hdr)
1914 {
1915         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1916         encode_uint32(xdr, args->one_fs);
1917 }
1918 #endif /* CONFIG_NFS_V4_1 */
1919
1920 static void encode_sequence(struct xdr_stream *xdr,
1921                             const struct nfs4_sequence_args *args,
1922                             struct compound_hdr *hdr)
1923 {
1924 #if defined(CONFIG_NFS_V4_1)
1925         struct nfs4_session *session;
1926         struct nfs4_slot_table *tp;
1927         struct nfs4_slot *slot = args->sa_slot;
1928         __be32 *p;
1929
1930         tp = slot->table;
1931         session = tp->session;
1932         if (!session)
1933                 return;
1934
1935         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1936
1937         /*
1938          * Sessionid + seqid + slotid + max slotid + cache_this
1939          */
1940         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1941                 "max_slotid=%d cache_this=%d\n",
1942                 __func__,
1943                 ((u32 *)session->sess_id.data)[0],
1944                 ((u32 *)session->sess_id.data)[1],
1945                 ((u32 *)session->sess_id.data)[2],
1946                 ((u32 *)session->sess_id.data)[3],
1947                 slot->seq_nr, slot->slot_nr,
1948                 tp->highest_used_slotid, args->sa_cache_this);
1949         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1950         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1951         *p++ = cpu_to_be32(slot->seq_nr);
1952         *p++ = cpu_to_be32(slot->slot_nr);
1953         *p++ = cpu_to_be32(tp->highest_used_slotid);
1954         *p = cpu_to_be32(args->sa_cache_this);
1955 #endif /* CONFIG_NFS_V4_1 */
1956 }
1957
1958 #ifdef CONFIG_NFS_V4_1
1959 static void
1960 encode_getdeviceinfo(struct xdr_stream *xdr,
1961                      const struct nfs4_getdeviceinfo_args *args,
1962                      struct compound_hdr *hdr)
1963 {
1964         __be32 *p;
1965
1966         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1967         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1968         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1969                                     NFS4_DEVICEID4_SIZE);
1970         *p++ = cpu_to_be32(args->pdev->layout_type);
1971         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1972
1973         p = reserve_space(xdr, 4 + 4);
1974         *p++ = cpu_to_be32(1);                  /* bitmap length */
1975         *p++ = cpu_to_be32(args->notify_types);
1976 }
1977
1978 static void
1979 encode_layoutget(struct xdr_stream *xdr,
1980                       const struct nfs4_layoutget_args *args,
1981                       struct compound_hdr *hdr)
1982 {
1983         __be32 *p;
1984
1985         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1986         p = reserve_space(xdr, 36);
1987         *p++ = cpu_to_be32(0);     /* Signal layout available */
1988         *p++ = cpu_to_be32(args->type);
1989         *p++ = cpu_to_be32(args->range.iomode);
1990         p = xdr_encode_hyper(p, args->range.offset);
1991         p = xdr_encode_hyper(p, args->range.length);
1992         p = xdr_encode_hyper(p, args->minlength);
1993         encode_nfs4_stateid(xdr, &args->stateid);
1994         encode_uint32(xdr, args->maxcount);
1995
1996         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1997                 __func__,
1998                 args->type,
1999                 args->range.iomode,
2000                 (unsigned long)args->range.offset,
2001                 (unsigned long)args->range.length,
2002                 args->maxcount);
2003 }
2004
2005 static int
2006 encode_layoutcommit(struct xdr_stream *xdr,
2007                     struct inode *inode,
2008                     const struct nfs4_layoutcommit_args *args,
2009                     struct compound_hdr *hdr)
2010 {
2011         __be32 *p;
2012
2013         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2014                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2015
2016         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2017         p = reserve_space(xdr, 20);
2018         /* Only whole file layouts */
2019         p = xdr_encode_hyper(p, 0); /* offset */
2020         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2021         *p = cpu_to_be32(0); /* reclaim */
2022         encode_nfs4_stateid(xdr, &args->stateid);
2023         if (args->lastbytewritten != U64_MAX) {
2024                 p = reserve_space(xdr, 20);
2025                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2026                 p = xdr_encode_hyper(p, args->lastbytewritten);
2027         } else {
2028                 p = reserve_space(xdr, 12);
2029                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2030         }
2031         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2032         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2033
2034         encode_uint32(xdr, args->layoutupdate_len);
2035         if (args->layoutupdate_pages)
2036                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2037                                 args->layoutupdate_len);
2038
2039         return 0;
2040 }
2041
2042 static void
2043 encode_layoutreturn(struct xdr_stream *xdr,
2044                     const struct nfs4_layoutreturn_args *args,
2045                     struct compound_hdr *hdr)
2046 {
2047         __be32 *p;
2048
2049         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2050         p = reserve_space(xdr, 16);
2051         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2052         *p++ = cpu_to_be32(args->layout_type);
2053         *p++ = cpu_to_be32(args->range.iomode);
2054         *p = cpu_to_be32(RETURN_FILE);
2055         p = reserve_space(xdr, 16);
2056         p = xdr_encode_hyper(p, args->range.offset);
2057         p = xdr_encode_hyper(p, args->range.length);
2058         spin_lock(&args->inode->i_lock);
2059         encode_nfs4_stateid(xdr, &args->stateid);
2060         spin_unlock(&args->inode->i_lock);
2061         if (args->ld_private->ops && args->ld_private->ops->encode)
2062                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2063         else
2064                 encode_uint32(xdr, 0);
2065 }
2066
2067 static int
2068 encode_secinfo_no_name(struct xdr_stream *xdr,
2069                        const struct nfs41_secinfo_no_name_args *args,
2070                        struct compound_hdr *hdr)
2071 {
2072         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2073         encode_uint32(xdr, args->style);
2074         return 0;
2075 }
2076
2077 static void encode_test_stateid(struct xdr_stream *xdr,
2078                                 const struct nfs41_test_stateid_args *args,
2079                                 struct compound_hdr *hdr)
2080 {
2081         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2082         encode_uint32(xdr, 1);
2083         encode_nfs4_stateid(xdr, args->stateid);
2084 }
2085
2086 static void encode_free_stateid(struct xdr_stream *xdr,
2087                                 const struct nfs41_free_stateid_args *args,
2088                                 struct compound_hdr *hdr)
2089 {
2090         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2091         encode_nfs4_stateid(xdr, &args->stateid);
2092 }
2093 #else
2094 static inline void
2095 encode_layoutreturn(struct xdr_stream *xdr,
2096                     const struct nfs4_layoutreturn_args *args,
2097                     struct compound_hdr *hdr)
2098 {
2099 }
2100
2101 static void
2102 encode_layoutget(struct xdr_stream *xdr,
2103                       const struct nfs4_layoutget_args *args,
2104                       struct compound_hdr *hdr)
2105 {
2106 }
2107 #endif /* CONFIG_NFS_V4_1 */
2108
2109 /*
2110  * END OF "GENERIC" ENCODE ROUTINES.
2111  */
2112
2113 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2114 {
2115 #if defined(CONFIG_NFS_V4_1)
2116         struct nfs4_session *session = args->sa_slot->table->session;
2117         if (session)
2118                 return session->clp->cl_mvops->minor_version;
2119 #endif /* CONFIG_NFS_V4_1 */
2120         return 0;
2121 }
2122
2123 /*
2124  * Encode an ACCESS request
2125  */
2126 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2127                                 const void *data)
2128 {
2129         const struct nfs4_accessargs *args = data;
2130         struct compound_hdr hdr = {
2131                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2132         };
2133
2134         encode_compound_hdr(xdr, req, &hdr);
2135         encode_sequence(xdr, &args->seq_args, &hdr);
2136         encode_putfh(xdr, args->fh, &hdr);
2137         encode_access(xdr, args->access, &hdr);
2138         if (args->bitmask)
2139                 encode_getfattr(xdr, args->bitmask, &hdr);
2140         encode_nops(&hdr);
2141 }
2142
2143 /*
2144  * Encode LOOKUP request
2145  */
2146 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2147                                 const void *data)
2148 {
2149         const struct nfs4_lookup_arg *args = data;
2150         struct compound_hdr hdr = {
2151                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152         };
2153
2154         encode_compound_hdr(xdr, req, &hdr);
2155         encode_sequence(xdr, &args->seq_args, &hdr);
2156         encode_putfh(xdr, args->dir_fh, &hdr);
2157         encode_lookup(xdr, args->name, &hdr);
2158         encode_getfh(xdr, &hdr);
2159         encode_getfattr(xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode LOOKUPP request
2165  */
2166 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                 const void *data)
2168 {
2169         const struct nfs4_lookupp_arg *args = data;
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         encode_compound_hdr(xdr, req, &hdr);
2175         encode_sequence(xdr, &args->seq_args, &hdr);
2176         encode_putfh(xdr, args->fh, &hdr);
2177         encode_lookupp(xdr, &hdr);
2178         encode_getfh(xdr, &hdr);
2179         encode_getfattr(xdr, args->bitmask, &hdr);
2180         encode_nops(&hdr);
2181 }
2182
2183 /*
2184  * Encode LOOKUP_ROOT request
2185  */
2186 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2187                                      struct xdr_stream *xdr,
2188                                      const void *data)
2189 {
2190         const struct nfs4_lookup_root_arg *args = data;
2191         struct compound_hdr hdr = {
2192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193         };
2194
2195         encode_compound_hdr(xdr, req, &hdr);
2196         encode_sequence(xdr, &args->seq_args, &hdr);
2197         encode_putrootfh(xdr, &hdr);
2198         encode_getfh(xdr, &hdr);
2199         encode_getfattr(xdr, args->bitmask, &hdr);
2200         encode_nops(&hdr);
2201 }
2202
2203 /*
2204  * Encode REMOVE request
2205  */
2206 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2207                                 const void *data)
2208 {
2209         const struct nfs_removeargs *args = data;
2210         struct compound_hdr hdr = {
2211                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212         };
2213
2214         encode_compound_hdr(xdr, req, &hdr);
2215         encode_sequence(xdr, &args->seq_args, &hdr);
2216         encode_putfh(xdr, args->fh, &hdr);
2217         encode_remove(xdr, &args->name, &hdr);
2218         encode_nops(&hdr);
2219 }
2220
2221 /*
2222  * Encode RENAME request
2223  */
2224 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2225                                 const void *data)
2226 {
2227         const struct nfs_renameargs *args = data;
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->old_dir, &hdr);
2235         encode_savefh(xdr, &hdr);
2236         encode_putfh(xdr, args->new_dir, &hdr);
2237         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode LINK request
2243  */
2244 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                               const void *data)
2246 {
2247         const struct nfs4_link_arg *args = data;
2248         struct compound_hdr hdr = {
2249                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2250         };
2251
2252         encode_compound_hdr(xdr, req, &hdr);
2253         encode_sequence(xdr, &args->seq_args, &hdr);
2254         encode_putfh(xdr, args->fh, &hdr);
2255         encode_savefh(xdr, &hdr);
2256         encode_putfh(xdr, args->dir_fh, &hdr);
2257         encode_link(xdr, args->name, &hdr);
2258         encode_restorefh(xdr, &hdr);
2259         encode_getfattr(xdr, args->bitmask, &hdr);
2260         encode_nops(&hdr);
2261 }
2262
2263 /*
2264  * Encode CREATE request
2265  */
2266 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2267                                 const void *data)
2268 {
2269         const struct nfs4_create_arg *args = data;
2270         struct compound_hdr hdr = {
2271                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272         };
2273
2274         encode_compound_hdr(xdr, req, &hdr);
2275         encode_sequence(xdr, &args->seq_args, &hdr);
2276         encode_putfh(xdr, args->dir_fh, &hdr);
2277         encode_create(xdr, args, &hdr);
2278         encode_getfh(xdr, &hdr);
2279         encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  * Encode SYMLINK request
2285  */
2286 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                                  const void *data)
2288 {
2289         const struct nfs4_create_arg *args = data;
2290
2291         nfs4_xdr_enc_create(req, xdr, args);
2292 }
2293
2294 /*
2295  * Encode GETATTR request
2296  */
2297 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2298                                  const void *data)
2299 {
2300         const struct nfs4_getattr_arg *args = data;
2301         struct compound_hdr hdr = {
2302                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303         };
2304
2305         encode_compound_hdr(xdr, req, &hdr);
2306         encode_sequence(xdr, &args->seq_args, &hdr);
2307         encode_putfh(xdr, args->fh, &hdr);
2308         encode_getfattr(xdr, args->bitmask, &hdr);
2309         encode_nops(&hdr);
2310 }
2311
2312 /*
2313  * Encode a CLOSE request
2314  */
2315 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2316                                const void *data)
2317 {
2318         const struct nfs_closeargs *args = data;
2319         struct compound_hdr hdr = {
2320                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321         };
2322
2323         encode_compound_hdr(xdr, req, &hdr);
2324         encode_sequence(xdr, &args->seq_args, &hdr);
2325         encode_putfh(xdr, args->fh, &hdr);
2326         if (args->lr_args)
2327                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2328         if (args->bitmask != NULL)
2329                 encode_getfattr(xdr, args->bitmask, &hdr);
2330         encode_close(xdr, args, &hdr);
2331         encode_nops(&hdr);
2332 }
2333
2334 /*
2335  * Encode an OPEN request
2336  */
2337 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2338                               const void *data)
2339 {
2340         const struct nfs_openargs *args = data;
2341         struct compound_hdr hdr = {
2342                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343         };
2344
2345         encode_compound_hdr(xdr, req, &hdr);
2346         encode_sequence(xdr, &args->seq_args, &hdr);
2347         encode_putfh(xdr, args->fh, &hdr);
2348         encode_open(xdr, args, &hdr);
2349         encode_getfh(xdr, &hdr);
2350         if (args->access)
2351                 encode_access(xdr, args->access, &hdr);
2352         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2353         if (args->lg_args) {
2354                 encode_layoutget(xdr, args->lg_args, &hdr);
2355                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2356                                         args->lg_args->layout.pglen,
2357                                         hdr.replen - pagepad_maxsz);
2358         }
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode an OPEN_CONFIRM request
2364  */
2365 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2366                                       struct xdr_stream *xdr,
2367                                       const void *data)
2368 {
2369         const struct nfs_open_confirmargs *args = data;
2370         struct compound_hdr hdr = {
2371                 .nops   = 0,
2372         };
2373
2374         encode_compound_hdr(xdr, req, &hdr);
2375         encode_putfh(xdr, args->fh, &hdr);
2376         encode_open_confirm(xdr, args, &hdr);
2377         encode_nops(&hdr);
2378 }
2379
2380 /*
2381  * Encode an OPEN request with no attributes.
2382  */
2383 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2384                                      struct xdr_stream *xdr,
2385                                      const void *data)
2386 {
2387         const struct nfs_openargs *args = data;
2388         struct compound_hdr hdr = {
2389                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2390         };
2391
2392         encode_compound_hdr(xdr, req, &hdr);
2393         encode_sequence(xdr, &args->seq_args, &hdr);
2394         encode_putfh(xdr, args->fh, &hdr);
2395         encode_open(xdr, args, &hdr);
2396         if (args->access)
2397                 encode_access(xdr, args->access, &hdr);
2398         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2399         if (args->lg_args) {
2400                 encode_layoutget(xdr, args->lg_args, &hdr);
2401                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2402                                         args->lg_args->layout.pglen,
2403                                         hdr.replen - pagepad_maxsz);
2404         }
2405         encode_nops(&hdr);
2406 }
2407
2408 /*
2409  * Encode an OPEN_DOWNGRADE request
2410  */
2411 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2412                                         struct xdr_stream *xdr,
2413                                         const void *data)
2414 {
2415         const struct nfs_closeargs *args = data;
2416         struct compound_hdr hdr = {
2417                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418         };
2419
2420         encode_compound_hdr(xdr, req, &hdr);
2421         encode_sequence(xdr, &args->seq_args, &hdr);
2422         encode_putfh(xdr, args->fh, &hdr);
2423         if (args->lr_args)
2424                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2425         encode_open_downgrade(xdr, args, &hdr);
2426         encode_nops(&hdr);
2427 }
2428
2429 /*
2430  * Encode a LOCK request
2431  */
2432 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2433                               const void *data)
2434 {
2435         const struct nfs_lock_args *args = data;
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438         };
2439
2440         encode_compound_hdr(xdr, req, &hdr);
2441         encode_sequence(xdr, &args->seq_args, &hdr);
2442         encode_putfh(xdr, args->fh, &hdr);
2443         encode_lock(xdr, args, &hdr);
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  * Encode a LOCKT request
2449  */
2450 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                const void *data)
2452 {
2453         const struct nfs_lockt_args *args = data;
2454         struct compound_hdr hdr = {
2455                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2456         };
2457
2458         encode_compound_hdr(xdr, req, &hdr);
2459         encode_sequence(xdr, &args->seq_args, &hdr);
2460         encode_putfh(xdr, args->fh, &hdr);
2461         encode_lockt(xdr, args, &hdr);
2462         encode_nops(&hdr);
2463 }
2464
2465 /*
2466  * Encode a LOCKU request
2467  */
2468 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2469                                const void *data)
2470 {
2471         const struct nfs_locku_args *args = data;
2472         struct compound_hdr hdr = {
2473                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2474         };
2475
2476         encode_compound_hdr(xdr, req, &hdr);
2477         encode_sequence(xdr, &args->seq_args, &hdr);
2478         encode_putfh(xdr, args->fh, &hdr);
2479         encode_locku(xdr, args, &hdr);
2480         encode_nops(&hdr);
2481 }
2482
2483 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2484                                            struct xdr_stream *xdr,
2485                                            const void *data)
2486 {
2487         const struct nfs_release_lockowner_args *args = data;
2488         struct compound_hdr hdr = {
2489                 .minorversion = 0,
2490         };
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2494         encode_nops(&hdr);
2495 }
2496
2497 /*
2498  * Encode a READLINK request
2499  */
2500 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2501                                   const void *data)
2502 {
2503         const struct nfs4_readlink *args = data;
2504         struct compound_hdr hdr = {
2505                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_sequence(xdr, &args->seq_args, &hdr);
2510         encode_putfh(xdr, args->fh, &hdr);
2511         encode_readlink(xdr, args, req, &hdr);
2512
2513         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2514                                 args->pglen, hdr.replen - pagepad_maxsz);
2515         encode_nops(&hdr);
2516 }
2517
2518 /*
2519  * Encode a READDIR request
2520  */
2521 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                  const void *data)
2523 {
2524         const struct nfs4_readdir_arg *args = data;
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_readdir(xdr, args, req, &hdr);
2533
2534         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2535                                 args->count, hdr.replen - pagepad_maxsz);
2536         encode_nops(&hdr);
2537 }
2538
2539 /*
2540  * Encode a READ request
2541  */
2542 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2543                               const void *data)
2544 {
2545         const struct nfs_pgio_args *args = data;
2546         struct compound_hdr hdr = {
2547                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2548         };
2549
2550         encode_compound_hdr(xdr, req, &hdr);
2551         encode_sequence(xdr, &args->seq_args, &hdr);
2552         encode_putfh(xdr, args->fh, &hdr);
2553         encode_read(xdr, args, &hdr);
2554
2555         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2556                                 args->count, hdr.replen - pagepad_maxsz);
2557         req->rq_rcv_buf.flags |= XDRBUF_READ;
2558         encode_nops(&hdr);
2559 }
2560
2561 /*
2562  * Encode an SETATTR request
2563  */
2564 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2565                                  const void *data)
2566 {
2567         const struct nfs_setattrargs *args = data;
2568         struct compound_hdr hdr = {
2569                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2570         };
2571
2572         encode_compound_hdr(xdr, req, &hdr);
2573         encode_sequence(xdr, &args->seq_args, &hdr);
2574         encode_putfh(xdr, args->fh, &hdr);
2575         encode_setattr(xdr, args, args->server, &hdr);
2576         encode_getfattr(xdr, args->bitmask, &hdr);
2577         encode_nops(&hdr);
2578 }
2579
2580 /*
2581  * Encode a GETACL request
2582  */
2583 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2584                                 const void *data)
2585 {
2586         const struct nfs_getaclargs *args = data;
2587         struct compound_hdr hdr = {
2588                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2589         };
2590         const __u32 nfs4_acl_bitmap[1] = {
2591                 [0] = FATTR4_WORD0_ACL,
2592         };
2593         uint32_t replen;
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fh, &hdr);
2598         replen = hdr.replen + op_decode_hdr_maxsz;
2599         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2600                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2601
2602         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2603                                 args->acl_len, replen);
2604         encode_nops(&hdr);
2605 }
2606
2607 /*
2608  * Encode a WRITE request
2609  */
2610 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2611                                const void *data)
2612 {
2613         const struct nfs_pgio_args *args = data;
2614         struct compound_hdr hdr = {
2615                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616         };
2617
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_sequence(xdr, &args->seq_args, &hdr);
2620         encode_putfh(xdr, args->fh, &hdr);
2621         encode_write(xdr, args, &hdr);
2622         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2623         if (args->bitmask)
2624                 encode_getfattr(xdr, args->bitmask, &hdr);
2625         encode_nops(&hdr);
2626 }
2627
2628 /*
2629  *  a COMMIT request
2630  */
2631 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2632                                 const void *data)
2633 {
2634         const struct nfs_commitargs *args = data;
2635         struct compound_hdr hdr = {
2636                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2637         };
2638
2639         encode_compound_hdr(xdr, req, &hdr);
2640         encode_sequence(xdr, &args->seq_args, &hdr);
2641         encode_putfh(xdr, args->fh, &hdr);
2642         encode_commit(xdr, args, &hdr);
2643         encode_nops(&hdr);
2644 }
2645
2646 /*
2647  * FSINFO request
2648  */
2649 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2650                                 const void *data)
2651 {
2652         const struct nfs4_fsinfo_arg *args = data;
2653         struct compound_hdr hdr = {
2654                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2655         };
2656
2657         encode_compound_hdr(xdr, req, &hdr);
2658         encode_sequence(xdr, &args->seq_args, &hdr);
2659         encode_putfh(xdr, args->fh, &hdr);
2660         encode_fsinfo(xdr, args->bitmask, &hdr);
2661         encode_nops(&hdr);
2662 }
2663
2664 /*
2665  * a PATHCONF request
2666  */
2667 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2668                                   const void *data)
2669 {
2670         const struct nfs4_pathconf_arg *args = data;
2671         struct compound_hdr hdr = {
2672                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2673         };
2674
2675         encode_compound_hdr(xdr, req, &hdr);
2676         encode_sequence(xdr, &args->seq_args, &hdr);
2677         encode_putfh(xdr, args->fh, &hdr);
2678         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2679                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2680         encode_nops(&hdr);
2681 }
2682
2683 /*
2684  * a STATFS request
2685  */
2686 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2687                                 const void *data)
2688 {
2689         const struct nfs4_statfs_arg *args = data;
2690         struct compound_hdr hdr = {
2691                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2692         };
2693
2694         encode_compound_hdr(xdr, req, &hdr);
2695         encode_sequence(xdr, &args->seq_args, &hdr);
2696         encode_putfh(xdr, args->fh, &hdr);
2697         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2698                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2699         encode_nops(&hdr);
2700 }
2701
2702 /*
2703  * GETATTR_BITMAP request
2704  */
2705 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2706                                      struct xdr_stream *xdr,
2707                                      const void *data)
2708 {
2709         const struct nfs4_server_caps_arg *args = data;
2710         const u32 *bitmask = args->bitmask;
2711         struct compound_hdr hdr = {
2712                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713         };
2714
2715         encode_compound_hdr(xdr, req, &hdr);
2716         encode_sequence(xdr, &args->seq_args, &hdr);
2717         encode_putfh(xdr, args->fhandle, &hdr);
2718         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2719         encode_nops(&hdr);
2720 }
2721
2722 /*
2723  * a RENEW request
2724  */
2725 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2726                                const void *data)
2727
2728 {
2729         const struct nfs_client *clp = data;
2730         struct compound_hdr hdr = {
2731                 .nops   = 0,
2732         };
2733
2734         encode_compound_hdr(xdr, req, &hdr);
2735         encode_renew(xdr, clp->cl_clientid, &hdr);
2736         encode_nops(&hdr);
2737 }
2738
2739 /*
2740  * a SETCLIENTID request
2741  */
2742 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2743                                      struct xdr_stream *xdr,
2744                                      const void *data)
2745 {
2746         const struct nfs4_setclientid *sc = data;
2747         struct compound_hdr hdr = {
2748                 .nops   = 0,
2749         };
2750
2751         encode_compound_hdr(xdr, req, &hdr);
2752         encode_setclientid(xdr, sc, &hdr);
2753         encode_nops(&hdr);
2754 }
2755
2756 /*
2757  * a SETCLIENTID_CONFIRM request
2758  */
2759 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2760                                              struct xdr_stream *xdr,
2761                                              const void *data)
2762 {
2763         const struct nfs4_setclientid_res *arg = data;
2764         struct compound_hdr hdr = {
2765                 .nops   = 0,
2766         };
2767
2768         encode_compound_hdr(xdr, req, &hdr);
2769         encode_setclientid_confirm(xdr, arg, &hdr);
2770         encode_nops(&hdr);
2771 }
2772
2773 /*
2774  * DELEGRETURN request
2775  */
2776 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2777                                      struct xdr_stream *xdr,
2778                                      const void *data)
2779 {
2780         const struct nfs4_delegreturnargs *args = data;
2781         struct compound_hdr hdr = {
2782                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2783         };
2784
2785         encode_compound_hdr(xdr, req, &hdr);
2786         encode_sequence(xdr, &args->seq_args, &hdr);
2787         encode_putfh(xdr, args->fhandle, &hdr);
2788         if (args->lr_args)
2789                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2790         if (args->bitmask)
2791                 encode_getfattr(xdr, args->bitmask, &hdr);
2792         encode_delegreturn(xdr, args->stateid, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * Encode FS_LOCATIONS request
2798  */
2799 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2800                                       struct xdr_stream *xdr,
2801                                       const void *data)
2802 {
2803         const struct nfs4_fs_locations_arg *args = data;
2804         struct compound_hdr hdr = {
2805                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2806         };
2807         uint32_t replen;
2808
2809         encode_compound_hdr(xdr, req, &hdr);
2810         encode_sequence(xdr, &args->seq_args, &hdr);
2811         if (args->migration) {
2812                 encode_putfh(xdr, args->fh, &hdr);
2813                 replen = hdr.replen;
2814                 encode_fs_locations(xdr, args->bitmask, &hdr);
2815                 if (args->renew)
2816                         encode_renew(xdr, args->clientid, &hdr);
2817         } else {
2818                 encode_putfh(xdr, args->dir_fh, &hdr);
2819                 encode_lookup(xdr, args->name, &hdr);
2820                 replen = hdr.replen;
2821                 encode_fs_locations(xdr, args->bitmask, &hdr);
2822         }
2823
2824         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2825                                 PAGE_SIZE, replen);
2826         encode_nops(&hdr);
2827 }
2828
2829 /*
2830  * Encode SECINFO request
2831  */
2832 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2833                                 struct xdr_stream *xdr,
2834                                 const void *data)
2835 {
2836         const struct nfs4_secinfo_arg *args = data;
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, &args->seq_args, &hdr);
2843         encode_putfh(xdr, args->dir_fh, &hdr);
2844         encode_secinfo(xdr, args->name, &hdr);
2845         encode_nops(&hdr);
2846 }
2847
2848 /*
2849  * Encode FSID_PRESENT request
2850  */
2851 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2852                                       struct xdr_stream *xdr,
2853                                       const void *data)
2854 {
2855         const struct nfs4_fsid_present_arg *args = data;
2856         struct compound_hdr hdr = {
2857                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2858         };
2859
2860         encode_compound_hdr(xdr, req, &hdr);
2861         encode_sequence(xdr, &args->seq_args, &hdr);
2862         encode_putfh(xdr, args->fh, &hdr);
2863         encode_getfh(xdr, &hdr);
2864         if (args->renew)
2865                 encode_renew(xdr, args->clientid, &hdr);
2866         encode_nops(&hdr);
2867 }
2868
2869 #if defined(CONFIG_NFS_V4_1)
2870 /*
2871  * BIND_CONN_TO_SESSION request
2872  */
2873 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2874                                 struct xdr_stream *xdr,
2875                                 const void *data)
2876 {
2877         const struct nfs41_bind_conn_to_session_args *args = data;
2878         struct compound_hdr hdr = {
2879                 .minorversion = args->client->cl_mvops->minor_version,
2880         };
2881
2882         encode_compound_hdr(xdr, req, &hdr);
2883         encode_bind_conn_to_session(xdr, args, &hdr);
2884         encode_nops(&hdr);
2885 }
2886
2887 /*
2888  * EXCHANGE_ID request
2889  */
2890 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2891                                      struct xdr_stream *xdr,
2892                                      const void *data)
2893 {
2894         const struct nfs41_exchange_id_args *args = data;
2895         struct compound_hdr hdr = {
2896                 .minorversion = args->client->cl_mvops->minor_version,
2897         };
2898
2899         encode_compound_hdr(xdr, req, &hdr);
2900         encode_exchange_id(xdr, args, &hdr);
2901         encode_nops(&hdr);
2902 }
2903
2904 /*
2905  * a CREATE_SESSION request
2906  */
2907 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2908                                         struct xdr_stream *xdr,
2909                                         const void *data)
2910 {
2911         const struct nfs41_create_session_args *args = data;
2912         struct compound_hdr hdr = {
2913                 .minorversion = args->client->cl_mvops->minor_version,
2914         };
2915
2916         encode_compound_hdr(xdr, req, &hdr);
2917         encode_create_session(xdr, args, &hdr);
2918         encode_nops(&hdr);
2919 }
2920
2921 /*
2922  * a DESTROY_SESSION request
2923  */
2924 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2925                                          struct xdr_stream *xdr,
2926                                          const void *data)
2927 {
2928         const struct nfs4_session *session = data;
2929         struct compound_hdr hdr = {
2930                 .minorversion = session->clp->cl_mvops->minor_version,
2931         };
2932
2933         encode_compound_hdr(xdr, req, &hdr);
2934         encode_destroy_session(xdr, session, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  * a DESTROY_CLIENTID request
2940  */
2941 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2942                                          struct xdr_stream *xdr,
2943                                          const void *data)
2944 {
2945         const struct nfs_client *clp = data;
2946         struct compound_hdr hdr = {
2947                 .minorversion = clp->cl_mvops->minor_version,
2948         };
2949
2950         encode_compound_hdr(xdr, req, &hdr);
2951         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2952         encode_nops(&hdr);
2953 }
2954
2955 /*
2956  * a SEQUENCE request
2957  */
2958 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2959                                   const void *data)
2960 {
2961         const struct nfs4_sequence_args *args = data;
2962         struct compound_hdr hdr = {
2963                 .minorversion = nfs4_xdr_minorversion(args),
2964         };
2965
2966         encode_compound_hdr(xdr, req, &hdr);
2967         encode_sequence(xdr, args, &hdr);
2968         encode_nops(&hdr);
2969 }
2970
2971 #endif
2972
2973 /*
2974  * a GET_LEASE_TIME request
2975  */
2976 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2977                                         struct xdr_stream *xdr,
2978                                         const void *data)
2979 {
2980         const struct nfs4_get_lease_time_args *args = data;
2981         struct compound_hdr hdr = {
2982                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2983         };
2984         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2985
2986         encode_compound_hdr(xdr, req, &hdr);
2987         encode_sequence(xdr, &args->la_seq_args, &hdr);
2988         encode_putrootfh(xdr, &hdr);
2989         encode_fsinfo(xdr, lease_bitmap, &hdr);
2990         encode_nops(&hdr);
2991 }
2992
2993 #ifdef CONFIG_NFS_V4_1
2994
2995 /*
2996  * a RECLAIM_COMPLETE request
2997  */
2998 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2999                                           struct xdr_stream *xdr,
3000                                           const void *data)
3001 {
3002         const struct nfs41_reclaim_complete_args *args = data;
3003         struct compound_hdr hdr = {
3004                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3005         };
3006
3007         encode_compound_hdr(xdr, req, &hdr);
3008         encode_sequence(xdr, &args->seq_args, &hdr);
3009         encode_reclaim_complete(xdr, args, &hdr);
3010         encode_nops(&hdr);
3011 }
3012
3013 /*
3014  * Encode GETDEVICEINFO request
3015  */
3016 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3017                                        struct xdr_stream *xdr,
3018                                        const void *data)
3019 {
3020         const struct nfs4_getdeviceinfo_args *args = data;
3021         struct compound_hdr hdr = {
3022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3023         };
3024         uint32_t replen;
3025
3026         encode_compound_hdr(xdr, req, &hdr);
3027         encode_sequence(xdr, &args->seq_args, &hdr);
3028
3029         replen = hdr.replen + op_decode_hdr_maxsz + 2;
3030
3031         encode_getdeviceinfo(xdr, args, &hdr);
3032
3033         /* set up reply kvec. device_addr4 opaque data is read into the
3034          * pages */
3035         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3036                                 args->pdev->pglen, replen);
3037         encode_nops(&hdr);
3038 }
3039
3040 /*
3041  *  Encode LAYOUTGET request
3042  */
3043 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3044                                    struct xdr_stream *xdr,
3045                                    const void *data)
3046 {
3047         const struct nfs4_layoutget_args *args = data;
3048         struct compound_hdr hdr = {
3049                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3050         };
3051
3052         encode_compound_hdr(xdr, req, &hdr);
3053         encode_sequence(xdr, &args->seq_args, &hdr);
3054         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3055         encode_layoutget(xdr, args, &hdr);
3056
3057         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3058                                 args->layout.pglen, hdr.replen - pagepad_maxsz);
3059         encode_nops(&hdr);
3060 }
3061
3062 /*
3063  *  Encode LAYOUTCOMMIT request
3064  */
3065 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3066                                       struct xdr_stream *xdr,
3067                                       const void *priv)
3068 {
3069         const struct nfs4_layoutcommit_args *args = priv;
3070         struct nfs4_layoutcommit_data *data =
3071                 container_of(args, struct nfs4_layoutcommit_data, args);
3072         struct compound_hdr hdr = {
3073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3074         };
3075
3076         encode_compound_hdr(xdr, req, &hdr);
3077         encode_sequence(xdr, &args->seq_args, &hdr);
3078         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3079         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3080         encode_getfattr(xdr, args->bitmask, &hdr);
3081         encode_nops(&hdr);
3082 }
3083
3084 /*
3085  * Encode LAYOUTRETURN request
3086  */
3087 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3088                                       struct xdr_stream *xdr,
3089                                       const void *data)
3090 {
3091         const struct nfs4_layoutreturn_args *args = data;
3092         struct compound_hdr hdr = {
3093                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3094         };
3095
3096         encode_compound_hdr(xdr, req, &hdr);
3097         encode_sequence(xdr, &args->seq_args, &hdr);
3098         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3099         encode_layoutreturn(xdr, args, &hdr);
3100         encode_nops(&hdr);
3101 }
3102
3103 /*
3104  * Encode SECINFO_NO_NAME request
3105  */
3106 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3107                                         struct xdr_stream *xdr,
3108                                         const void *data)
3109 {
3110         const struct nfs41_secinfo_no_name_args *args = data;
3111         struct compound_hdr hdr = {
3112                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3113         };
3114
3115         encode_compound_hdr(xdr, req, &hdr);
3116         encode_sequence(xdr, &args->seq_args, &hdr);
3117         encode_putrootfh(xdr, &hdr);
3118         encode_secinfo_no_name(xdr, args, &hdr);
3119         encode_nops(&hdr);
3120 }
3121
3122 /*
3123  *  Encode TEST_STATEID request
3124  */
3125 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3126                                       struct xdr_stream *xdr,
3127                                       const void *data)
3128 {
3129         const struct nfs41_test_stateid_args *args = data;
3130         struct compound_hdr hdr = {
3131                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3132         };
3133
3134         encode_compound_hdr(xdr, req, &hdr);
3135         encode_sequence(xdr, &args->seq_args, &hdr);
3136         encode_test_stateid(xdr, args, &hdr);
3137         encode_nops(&hdr);
3138 }
3139
3140 /*
3141  *  Encode FREE_STATEID request
3142  */
3143 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3144                                      struct xdr_stream *xdr,
3145                                      const void *data)
3146 {
3147         const struct nfs41_free_stateid_args *args = data;
3148         struct compound_hdr hdr = {
3149                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3150         };
3151
3152         encode_compound_hdr(xdr, req, &hdr);
3153         encode_sequence(xdr, &args->seq_args, &hdr);
3154         encode_free_stateid(xdr, args, &hdr);
3155         encode_nops(&hdr);
3156 }
3157 #endif /* CONFIG_NFS_V4_1 */
3158
3159 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3160 {
3161         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3162                         NFS4_OPAQUE_LIMIT);
3163         if (unlikely(ret < 0))
3164                 return -EIO;
3165         *len = ret;
3166         return 0;
3167 }
3168
3169 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3170 {
3171         ssize_t ret;
3172         void *ptr;
3173         u32 tmp;
3174
3175         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3176                 return -EIO;
3177         hdr->status = tmp;
3178
3179         ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT);
3180         if (ret < 0)
3181                 return -EIO;
3182         hdr->taglen = ret;
3183         hdr->tag = ptr;
3184
3185         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3186                 return -EIO;
3187         hdr->nops = tmp;
3188         if (unlikely(hdr->nops < 1))
3189                 return nfs4_stat_to_errno(hdr->status);
3190         return 0;
3191 }
3192
3193 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3194                 int *nfs_retval)
3195 {
3196         __be32 *p;
3197         uint32_t opnum;
3198         int32_t nfserr;
3199
3200         p = xdr_inline_decode(xdr, 8);
3201         if (unlikely(!p))
3202                 goto out_overflow;
3203         opnum = be32_to_cpup(p++);
3204         if (unlikely(opnum != expected))
3205                 goto out_bad_operation;
3206         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3207                 goto out_status;
3208         *nfs_retval = 0;
3209         return true;
3210 out_status:
3211         nfserr = be32_to_cpup(p);
3212         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3213         *nfs_retval = nfs4_stat_to_errno(nfserr);
3214         return true;
3215 out_bad_operation:
3216         trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3217         *nfs_retval = -EREMOTEIO;
3218         return false;
3219 out_overflow:
3220         *nfs_retval = -EIO;
3221         return false;
3222 }
3223
3224 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3225 {
3226         int retval;
3227
3228         __decode_op_hdr(xdr, expected, &retval);
3229         return retval;
3230 }
3231
3232 /* Dummy routine */
3233 static int decode_ace(struct xdr_stream *xdr, void *ace)
3234 {
3235         __be32 *p;
3236         unsigned int strlen;
3237         char *str;
3238
3239         p = xdr_inline_decode(xdr, 12);
3240         if (unlikely(!p))
3241                 return -EIO;
3242         return decode_opaque_inline(xdr, &strlen, &str);
3243 }
3244
3245 static ssize_t
3246 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3247 {
3248         ssize_t ret;
3249
3250         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3251         if (likely(ret >= 0))
3252                 return ret;
3253         if (ret != -EMSGSIZE)
3254                 return -EIO;
3255         return sz;
3256 }
3257
3258 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3259 {
3260         ssize_t ret;
3261         ret = decode_bitmap4(xdr, bitmap, 3);
3262         return ret < 0 ? ret : 0;
3263 }
3264
3265 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3266 {
3267         __be32 *p;
3268
3269         p = xdr_inline_decode(xdr, 4);
3270         if (unlikely(!p))
3271                 return -EIO;
3272         *attrlen = be32_to_cpup(p);
3273         *savep = xdr_stream_pos(xdr);
3274         return 0;
3275 }
3276
3277 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3278 {
3279         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3280                 int ret;
3281                 ret = decode_attr_bitmap(xdr, bitmask);
3282                 if (unlikely(ret < 0))
3283                         return ret;
3284                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3285         } else
3286                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3287         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3288                 bitmask[0], bitmask[1], bitmask[2]);
3289         return 0;
3290 }
3291
3292 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3293 {
3294         __be32 *p;
3295         int ret = 0;
3296
3297         *type = 0;
3298         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3299                 return -EIO;
3300         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3301                 p = xdr_inline_decode(xdr, 4);
3302                 if (unlikely(!p))
3303                         return -EIO;
3304                 *type = be32_to_cpup(p);
3305                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3306                         dprintk("%s: bad type %d\n", __func__, *type);
3307                         return -EIO;
3308                 }
3309                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3310                 ret = NFS_ATTR_FATTR_TYPE;
3311         }
3312         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3313         return ret;
3314 }
3315
3316 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3317                                       uint32_t *bitmap, uint32_t *type)
3318 {
3319         __be32 *p;
3320
3321         *type = 0;
3322         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3323                 return -EIO;
3324         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3325                 p = xdr_inline_decode(xdr, 4);
3326                 if (unlikely(!p))
3327                         return -EIO;
3328                 *type = be32_to_cpup(p);
3329                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3330         }
3331         dprintk("%s: expire type=0x%x\n", __func__, *type);
3332         return 0;
3333 }
3334
3335 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3336 {
3337         __be32 *p;
3338         int ret = 0;
3339
3340         *change = 0;
3341         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3342                 return -EIO;
3343         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3344                 p = xdr_inline_decode(xdr, 8);
3345                 if (unlikely(!p))
3346                         return -EIO;
3347                 xdr_decode_hyper(p, change);
3348                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3349                 ret = NFS_ATTR_FATTR_CHANGE;
3350         }
3351         dprintk("%s: change attribute=%Lu\n", __func__,
3352                         (unsigned long long)*change);
3353         return ret;
3354 }
3355
3356 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3357 {
3358         __be32 *p;
3359         int ret = 0;
3360
3361         *size = 0;
3362         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3363                 return -EIO;
3364         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3365                 p = xdr_inline_decode(xdr, 8);
3366                 if (unlikely(!p))
3367                         return -EIO;
3368                 xdr_decode_hyper(p, size);
3369                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3370                 ret = NFS_ATTR_FATTR_SIZE;
3371         }
3372         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3373         return ret;
3374 }
3375
3376 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3377 {
3378         __be32 *p;
3379
3380         *res = 0;
3381         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3382                 return -EIO;
3383         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3384                 p = xdr_inline_decode(xdr, 4);
3385                 if (unlikely(!p))
3386                         return -EIO;
3387                 *res = be32_to_cpup(p);
3388                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3389         }
3390         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3391         return 0;
3392 }
3393
3394 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3395 {
3396         __be32 *p;
3397
3398         *res = 0;
3399         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3400                 return -EIO;
3401         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3402                 p = xdr_inline_decode(xdr, 4);
3403                 if (unlikely(!p))
3404                         return -EIO;
3405                 *res = be32_to_cpup(p);
3406                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3407         }
3408         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3409         return 0;
3410 }
3411
3412 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3413 {
3414         __be32 *p;
3415         int ret = 0;
3416
3417         fsid->major = 0;
3418         fsid->minor = 0;
3419         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3420                 return -EIO;
3421         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3422                 p = xdr_inline_decode(xdr, 16);
3423                 if (unlikely(!p))
3424                         return -EIO;
3425                 p = xdr_decode_hyper(p, &fsid->major);
3426                 xdr_decode_hyper(p, &fsid->minor);
3427                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3428                 ret = NFS_ATTR_FATTR_FSID;
3429         }
3430         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3431                         (unsigned long long)fsid->major,
3432                         (unsigned long long)fsid->minor);
3433         return ret;
3434 }
3435
3436 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3437 {
3438         __be32 *p;
3439
3440         *res = 60;
3441         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3442                 return -EIO;
3443         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3444                 p = xdr_inline_decode(xdr, 4);
3445                 if (unlikely(!p))
3446                         return -EIO;
3447                 *res = be32_to_cpup(p);
3448                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3449         }
3450         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3451         return 0;
3452 }
3453
3454 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3455 {
3456         __be32 *p;
3457
3458         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3459                 return -EIO;
3460         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3461                 p = xdr_inline_decode(xdr, 4);
3462                 if (unlikely(!p))
3463                         return -EIO;
3464                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3465                 *res = -be32_to_cpup(p);
3466         }
3467         return 0;
3468 }
3469
3470 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3471                                  uint32_t *bitmap, uint32_t *bitmask)
3472 {
3473         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3474                 int ret;
3475                 ret = decode_attr_bitmap(xdr, bitmask);
3476                 if (unlikely(ret < 0))
3477                         return ret;
3478                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3479         } else
3480                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3481         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3482                 bitmask[0], bitmask[1], bitmask[2]);
3483         return 0;
3484 }
3485
3486 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3487 {
3488         __be32 *p;
3489         u32 len;
3490
3491         if (fh != NULL)
3492                 memset(fh, 0, sizeof(*fh));
3493
3494         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3495                 return -EIO;
3496         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3497                 p = xdr_inline_decode(xdr, 4);
3498                 if (unlikely(!p))
3499                         return -EIO;
3500                 len = be32_to_cpup(p);
3501                 if (len > NFS4_FHSIZE || len == 0) {
3502                         trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3503                                                       NFS4ERR_BADHANDLE);
3504                         return -EREMOTEIO;
3505                 }
3506                 p = xdr_inline_decode(xdr, len);
3507                 if (unlikely(!p))
3508                         return -EIO;
3509                 if (fh != NULL) {
3510                         memcpy(fh->data, p, len);
3511                         fh->size = len;
3512                 }
3513                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3514         }
3515         return 0;
3516 }
3517
3518 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3519 {
3520         __be32 *p;
3521
3522         *res = 0;
3523         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3524                 return -EIO;
3525         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3526                 p = xdr_inline_decode(xdr, 4);
3527                 if (unlikely(!p))
3528                         return -EIO;
3529                 *res = be32_to_cpup(p);
3530                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3531         }
3532         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3533         return 0;
3534 }
3535
3536 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3537 {
3538         __be32 *p;
3539         int ret = 0;
3540
3541         *fileid = 0;
3542         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3543                 return -EIO;
3544         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3545                 p = xdr_inline_decode(xdr, 8);
3546                 if (unlikely(!p))
3547                         return -EIO;
3548                 xdr_decode_hyper(p, fileid);
3549                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3550                 ret = NFS_ATTR_FATTR_FILEID;
3551         }
3552         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3553         return ret;
3554 }
3555
3556 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3557 {
3558         __be32 *p;
3559         int ret = 0;
3560
3561         *fileid = 0;
3562         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3563                 return -EIO;
3564         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3565                 p = xdr_inline_decode(xdr, 8);
3566                 if (unlikely(!p))
3567                         return -EIO;
3568                 xdr_decode_hyper(p, fileid);
3569                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3570                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3571         }
3572         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3573         return ret;
3574 }
3575
3576 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3577 {
3578         __be32 *p;
3579         int status = 0;
3580
3581         *res = 0;
3582         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3583                 return -EIO;
3584         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3585                 p = xdr_inline_decode(xdr, 8);
3586                 if (unlikely(!p))
3587                         return -EIO;
3588                 xdr_decode_hyper(p, res);
3589                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3590         }
3591         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3592         return status;
3593 }
3594
3595 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3596 {
3597         __be32 *p;
3598         int status = 0;
3599
3600         *res = 0;
3601         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3602                 return -EIO;
3603         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3604                 p = xdr_inline_decode(xdr, 8);
3605                 if (unlikely(!p))
3606                         return -EIO;
3607                 xdr_decode_hyper(p, res);
3608                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3609         }
3610         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3611         return status;
3612 }
3613
3614 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3615 {
3616         __be32 *p;
3617         int status = 0;
3618
3619         *res = 0;
3620         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3621                 return -EIO;
3622         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3623                 p = xdr_inline_decode(xdr, 8);
3624                 if (unlikely(!p))
3625                         return -EIO;
3626                 xdr_decode_hyper(p, res);
3627                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3628         }
3629         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3630         return status;
3631 }
3632
3633 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3634 {
3635         u32 n;
3636         __be32 *p;
3637         int status = 0;
3638
3639         p = xdr_inline_decode(xdr, 4);
3640         if (unlikely(!p))
3641                 return -EIO;
3642         n = be32_to_cpup(p);
3643         if (n == 0)
3644                 goto root_path;
3645         dprintk("pathname4: ");
3646         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3647                 dprintk("cannot parse %d components in path\n", n);
3648                 goto out_eio;
3649         }
3650         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3651                 struct nfs4_string *component = &path->components[path->ncomponents];
3652                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3653                 if (unlikely(status != 0))
3654                         goto out_eio;
3655                 ifdebug (XDR)
3656                         pr_cont("%s%.*s ",
3657                                 (path->ncomponents != n ? "/ " : ""),
3658                                 component->len, component->data);
3659         }
3660 out:
3661         return status;
3662 root_path:
3663 /* a root pathname is sent as a zero component4 */
3664         path->ncomponents = 1;
3665         path->components[0].len=0;
3666         path->components[0].data=NULL;
3667         dprintk("pathname4: /\n");
3668         goto out;
3669 out_eio:
3670         dprintk(" status %d", status);
3671         status = -EIO;
3672         goto out;
3673 }
3674
3675 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3676 {
3677         int n;
3678         __be32 *p;
3679         int status = -EIO;
3680
3681         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3682                 goto out;
3683         status = 0;
3684         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3685                 goto out;
3686         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3687         status = -EIO;
3688         /* Ignore borken servers that return unrequested attrs */
3689         if (unlikely(res == NULL))
3690                 goto out;
3691         dprintk("%s: fsroot:\n", __func__);
3692         status = decode_pathname(xdr, &res->fs_path);
3693         if (unlikely(status != 0))
3694                 goto out;
3695         p = xdr_inline_decode(xdr, 4);
3696         if (unlikely(!p))
3697                 goto out_eio;
3698         n = be32_to_cpup(p);
3699         if (n <= 0)
3700                 goto out_eio;
3701         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3702                 u32 m;
3703                 struct nfs4_fs_location *loc;
3704
3705                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3706                         break;
3707                 loc = &res->locations[res->nlocations];
3708                 p = xdr_inline_decode(xdr, 4);
3709                 if (unlikely(!p))
3710                         goto out_eio;
3711                 m = be32_to_cpup(p);
3712
3713                 dprintk("%s: servers:\n", __func__);
3714                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3715                         struct nfs4_string *server;
3716
3717                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3718                                 unsigned int i;
3719                                 dprintk("%s: using first %u of %u servers "
3720                                         "returned for location %u\n",
3721                                                 __func__,
3722                                                 NFS4_FS_LOCATION_MAXSERVERS,
3723                                                 m, res->nlocations);
3724                                 for (i = loc->nservers; i < m; i++) {
3725                                         unsigned int len;
3726                                         char *data;
3727                                         status = decode_opaque_inline(xdr, &len, &data);
3728                                         if (unlikely(status != 0))
3729                                                 goto out_eio;
3730                                 }
3731                                 break;
3732                         }
3733                         server = &loc->servers[loc->nservers];
3734                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3735                         if (unlikely(status != 0))
3736                                 goto out_eio;
3737                         dprintk("%s ", server->data);
3738                 }
3739                 status = decode_pathname(xdr, &loc->rootpath);
3740                 if (unlikely(status != 0))
3741                         goto out_eio;
3742         }
3743         if (res->nlocations != 0)
3744                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3745 out:
3746         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3747         return status;
3748 out_eio:
3749         status = -EIO;
3750         goto out;
3751 }
3752
3753 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3754 {
3755         __be32 *p;
3756         int status = 0;
3757
3758         *res = 0;
3759         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3762                 p = xdr_inline_decode(xdr, 8);
3763                 if (unlikely(!p))
3764                         return -EIO;
3765                 xdr_decode_hyper(p, res);
3766                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3767         }
3768         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3769         return status;
3770 }
3771
3772 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3773 {
3774         __be32 *p;
3775         int status = 0;
3776
3777         *maxlink = 1;
3778         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3779                 return -EIO;
3780         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3781                 p = xdr_inline_decode(xdr, 4);
3782                 if (unlikely(!p))
3783                         return -EIO;
3784                 *maxlink = be32_to_cpup(p);
3785                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3786         }
3787         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3788         return status;
3789 }
3790
3791 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3792 {
3793         __be32 *p;
3794         int status = 0;
3795
3796         *maxname = 1024;
3797         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3798                 return -EIO;
3799         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3800                 p = xdr_inline_decode(xdr, 4);
3801                 if (unlikely(!p))
3802                         return -EIO;
3803                 *maxname = be32_to_cpup(p);
3804                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3805         }
3806         dprintk("%s: maxname=%u\n", __func__, *maxname);
3807         return status;
3808 }
3809
3810 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3811 {
3812         __be32 *p;
3813         int status = 0;
3814
3815         *res = 1024;
3816         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3817                 return -EIO;
3818         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3819                 uint64_t maxread;
3820                 p = xdr_inline_decode(xdr, 8);
3821                 if (unlikely(!p))
3822                         return -EIO;
3823                 xdr_decode_hyper(p, &maxread);
3824                 if (maxread > 0x7FFFFFFF)
3825                         maxread = 0x7FFFFFFF;
3826                 *res = (uint32_t)maxread;
3827                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3828         }
3829         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3830         return status;
3831 }
3832
3833 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3834 {
3835         __be32 *p;
3836         int status = 0;
3837
3838         *res = 1024;
3839         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3842                 uint64_t maxwrite;
3843                 p = xdr_inline_decode(xdr, 8);
3844                 if (unlikely(!p))
3845                         return -EIO;
3846                 xdr_decode_hyper(p, &maxwrite);
3847                 if (maxwrite > 0x7FFFFFFF)
3848                         maxwrite = 0x7FFFFFFF;
3849                 *res = (uint32_t)maxwrite;
3850                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3851         }
3852         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3853         return status;
3854 }
3855
3856 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3857 {
3858         uint32_t tmp;
3859         __be32 *p;
3860         int ret = 0;
3861
3862         *mode = 0;
3863         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3864                 return -EIO;
3865         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3866                 p = xdr_inline_decode(xdr, 4);
3867                 if (unlikely(!p))
3868                         return -EIO;
3869                 tmp = be32_to_cpup(p);
3870                 *mode = tmp & ~S_IFMT;
3871                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3872                 ret = NFS_ATTR_FATTR_MODE;
3873         }
3874         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3875         return ret;
3876 }
3877
3878 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3879 {
3880         __be32 *p;
3881         int ret = 0;
3882
3883         *nlink = 1;
3884         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3885                 return -EIO;
3886         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3887                 p = xdr_inline_decode(xdr, 4);
3888                 if (unlikely(!p))
3889                         return -EIO;
3890                 *nlink = be32_to_cpup(p);
3891                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3892                 ret = NFS_ATTR_FATTR_NLINK;
3893         }
3894         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3895         return ret;
3896 }
3897
3898 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3899                 struct nfs4_string *name, gfp_t gfp_flags)
3900 {
3901         ssize_t ret;
3902
3903         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3904                         XDR_MAX_NETOBJ, gfp_flags);
3905         name->len = 0;
3906         if (ret > 0)
3907                 name->len = ret;
3908         return ret;
3909 }
3910
3911 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3912                 const struct nfs_server *server, kuid_t *uid,
3913                 struct nfs4_string *owner_name)
3914 {
3915         ssize_t len;
3916         char *p;
3917
3918         *uid = make_kuid(&init_user_ns, -2);
3919         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3920                 return -EIO;
3921         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3922                 return 0;
3923         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3924
3925         if (owner_name != NULL) {
3926                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3927                 if (len <= 0)
3928                         goto out;
3929                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3930                 return NFS_ATTR_FATTR_OWNER_NAME;
3931         } else {
3932                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3933                                 XDR_MAX_NETOBJ);
3934                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3935                         goto out;
3936                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3937                 return NFS_ATTR_FATTR_OWNER;
3938         }
3939 out:
3940         if (len == -EBADMSG)
3941                 return -EIO;
3942         return 0;
3943 }
3944
3945 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3946                 const struct nfs_server *server, kgid_t *gid,
3947                 struct nfs4_string *group_name)
3948 {
3949         ssize_t len;
3950         char *p;
3951
3952         *gid = make_kgid(&init_user_ns, -2);
3953         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3954                 return -EIO;
3955         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3956                 return 0;
3957         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3958
3959         if (group_name != NULL) {
3960                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3961                 if (len <= 0)
3962                         goto out;
3963                 dprintk("%s: name=%s\n", __func__, group_name->data);
3964                 return NFS_ATTR_FATTR_GROUP_NAME;
3965         } else {
3966                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3967                                 XDR_MAX_NETOBJ);
3968                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3969                         goto out;
3970                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3971                 return NFS_ATTR_FATTR_GROUP;
3972         }
3973 out:
3974         if (len == -EBADMSG)
3975                 return -EIO;
3976         return 0;
3977 }
3978
3979 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3980 {
3981         uint32_t major = 0, minor = 0;
3982         __be32 *p;
3983         int ret = 0;
3984
3985         *rdev = MKDEV(0,0);
3986         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3987                 return -EIO;
3988         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3989                 dev_t tmp;
3990
3991                 p = xdr_inline_decode(xdr, 8);
3992                 if (unlikely(!p))
3993                         return -EIO;
3994                 major = be32_to_cpup(p++);
3995                 minor = be32_to_cpup(p);
3996                 tmp = MKDEV(major, minor);
3997                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3998                         *rdev = tmp;
3999                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4000                 ret = NFS_ATTR_FATTR_RDEV;
4001         }
4002         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4003         return ret;
4004 }
4005
4006 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4007 {
4008         __be32 *p;
4009         int status = 0;
4010
4011         *res = 0;
4012         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4013                 return -EIO;
4014         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4015                 p = xdr_inline_decode(xdr, 8);
4016                 if (unlikely(!p))
4017                         return -EIO;
4018                 xdr_decode_hyper(p, res);
4019                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4020         }
4021         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4022         return status;
4023 }
4024
4025 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4026 {
4027         __be32 *p;
4028         int status = 0;
4029
4030         *res = 0;
4031         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4032                 return -EIO;
4033         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4034                 p = xdr_inline_decode(xdr, 8);
4035                 if (unlikely(!p))
4036                         return -EIO;
4037                 xdr_decode_hyper(p, res);
4038                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4039         }
4040         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4041         return status;
4042 }
4043
4044 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4045 {
4046         __be32 *p;
4047         int status = 0;
4048
4049         *res = 0;
4050         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4051                 return -EIO;
4052         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4053                 p = xdr_inline_decode(xdr, 8);
4054                 if (unlikely(!p))
4055                         return -EIO;
4056                 xdr_decode_hyper(p, res);
4057                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4058         }
4059         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4060         return status;
4061 }
4062
4063 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4064 {
4065         __be32 *p;
4066         int ret = 0;
4067
4068         *used = 0;
4069         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4070                 return -EIO;
4071         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4072                 p = xdr_inline_decode(xdr, 8);
4073                 if (unlikely(!p))
4074                         return -EIO;
4075                 xdr_decode_hyper(p, used);
4076                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4077                 ret = NFS_ATTR_FATTR_SPACE_USED;
4078         }
4079         dprintk("%s: space used=%Lu\n", __func__,
4080                         (unsigned long long)*used);
4081         return ret;
4082 }
4083
4084 static __be32 *
4085 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4086 {
4087         __u64 sec;
4088
4089         p = xdr_decode_hyper(p, &sec);
4090         t-> tv_sec = sec;
4091         t->tv_nsec = be32_to_cpup(p++);
4092         return p;
4093 }
4094
4095 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4096 {
4097         __be32 *p;
4098
4099         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4100         if (unlikely(!p))
4101                 return -EIO;
4102         xdr_decode_nfstime4(p, time);
4103         return 0;
4104 }
4105
4106 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4107 {
4108         int status = 0;
4109
4110         time->tv_sec = 0;
4111         time->tv_nsec = 0;
4112         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4113                 return -EIO;
4114         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4115                 status = decode_attr_time(xdr, time);
4116                 if (status == 0)
4117                         status = NFS_ATTR_FATTR_ATIME;
4118                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4119         }
4120         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4121         return status;
4122 }
4123
4124 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4125 {
4126         int status = 0;
4127
4128         time->tv_sec = 0;
4129         time->tv_nsec = 0;
4130         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4131                 return -EIO;
4132         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4133                 status = decode_attr_time(xdr, time);
4134                 if (status == 0)
4135                         status = NFS_ATTR_FATTR_CTIME;
4136                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4137         }
4138         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4139         return status;
4140 }
4141
4142 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4143                                   struct timespec64 *time)
4144 {
4145         int status = 0;
4146
4147         time->tv_sec = 0;
4148         time->tv_nsec = 0;
4149         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4150                 return -EIO;
4151         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4152                 status = decode_attr_time(xdr, time);
4153                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4154         }
4155         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4156                 time->tv_nsec);
4157         return status;
4158 }
4159
4160 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4161                                         struct nfs4_label *label)
4162 {
4163         uint32_t pi = 0;
4164         uint32_t lfs = 0;
4165         __u32 len;
4166         __be32 *p;
4167         int status = 0;
4168
4169         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4170                 return -EIO;
4171         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4172                 p = xdr_inline_decode(xdr, 4);
4173                 if (unlikely(!p))
4174                         return -EIO;
4175                 lfs = be32_to_cpup(p++);
4176                 p = xdr_inline_decode(xdr, 4);
4177                 if (unlikely(!p))
4178                         return -EIO;
4179                 pi = be32_to_cpup(p++);
4180                 p = xdr_inline_decode(xdr, 4);
4181                 if (unlikely(!p))
4182                         return -EIO;
4183                 len = be32_to_cpup(p++);
4184                 p = xdr_inline_decode(xdr, len);
4185                 if (unlikely(!p))
4186                         return -EIO;
4187                 if (len < NFS4_MAXLABELLEN) {
4188                         if (label) {
4189                                 if (label->len) {
4190                                         if (label->len < len)
4191                                                 return -ERANGE;
4192                                         memcpy(label->label, p, len);
4193                                 }
4194                                 label->len = len;
4195                                 label->pi = pi;
4196                                 label->lfs = lfs;
4197                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4198                         }
4199                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4200                 } else
4201                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4202                                         __func__, len);
4203         }
4204         if (label && label->label)
4205                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4206                         (char *)label->label, label->len, label->pi, label->lfs);
4207         return status;
4208 }
4209
4210 static int decode_attr_time_modify(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_MODIFY - 1U)))
4217                 return -EIO;
4218         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4219                 status = decode_attr_time(xdr, time);
4220                 if (status == 0)
4221                         status = NFS_ATTR_FATTR_MTIME;
4222                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4223         }
4224         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4225         return status;
4226 }
4227
4228 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4229                                     uint32_t *res)
4230 {
4231         __be32 *p;
4232
4233         *res = 0;
4234         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4235                 return -EIO;
4236         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4237                 p = xdr_inline_decode(xdr, 4);
4238                 if (unlikely(!p))
4239                         return -EIO;
4240                 *res = be32_to_cpup(p);
4241                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4242         }
4243         dprintk("%s: XATTR support=%s\n", __func__,
4244                 *res == 0 ? "false" : "true");
4245         return 0;
4246 }
4247
4248 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4249 {
4250         unsigned int attrwords = XDR_QUADLEN(attrlen);
4251         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4252
4253         if (unlikely(attrwords != nwords)) {
4254                 dprintk("%s: server returned incorrect attribute length: "
4255                         "%u %c %u\n",
4256                                 __func__,
4257                                 attrwords << 2,
4258                                 (attrwords < nwords) ? '<' : '>',
4259                                 nwords << 2);
4260                 return -EIO;
4261         }
4262         return 0;
4263 }
4264
4265 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4266 {
4267         __be32 *p;
4268
4269         p = xdr_inline_decode(xdr, 20);
4270         if (unlikely(!p))
4271                 return -EIO;
4272         cinfo->atomic = be32_to_cpup(p++);
4273         p = xdr_decode_hyper(p, &cinfo->before);
4274         xdr_decode_hyper(p, &cinfo->after);
4275         return 0;
4276 }
4277
4278 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4279 {
4280         __be32 *p;
4281         uint32_t supp, acc;
4282         int status;
4283
4284         status = decode_op_hdr(xdr, OP_ACCESS);
4285         if (status)
4286                 return status;
4287         p = xdr_inline_decode(xdr, 8);
4288         if (unlikely(!p))
4289                 return -EIO;
4290         supp = be32_to_cpup(p++);
4291         acc = be32_to_cpup(p);
4292         *supported = supp;
4293         *access = acc;
4294         return 0;
4295 }
4296
4297 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4298 {
4299         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4300         if (unlikely(ret < 0))
4301                 return -EIO;
4302         return 0;
4303 }
4304
4305 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4306 {
4307         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4308 }
4309
4310 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4311 {
4312         stateid->type = NFS4_OPEN_STATEID_TYPE;
4313         return decode_stateid(xdr, stateid);
4314 }
4315
4316 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4317 {
4318         stateid->type = NFS4_LOCK_STATEID_TYPE;
4319         return decode_stateid(xdr, stateid);
4320 }
4321
4322 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4323 {
4324         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4325         return decode_stateid(xdr, stateid);
4326 }
4327
4328 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4329 {
4330         nfs4_stateid dummy;
4331
4332         nfs4_stateid_copy(stateid, &invalid_stateid);
4333         return decode_stateid(xdr, &dummy);
4334 }
4335
4336 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4337 {
4338         int status;
4339
4340         status = decode_op_hdr(xdr, OP_CLOSE);
4341         if (status != -EIO)
4342                 nfs_increment_open_seqid(status, res->seqid);
4343         if (!status)
4344                 status = decode_invalid_stateid(xdr, &res->stateid);
4345         return status;
4346 }
4347
4348 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4349 {
4350         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4351 }
4352
4353 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4354 {
4355         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4356 }
4357
4358 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4359 {
4360         struct nfs_writeverf *verf = res->verf;
4361         int status;
4362
4363         status = decode_op_hdr(xdr, OP_COMMIT);
4364         if (!status)
4365                 status = decode_write_verifier(xdr, &verf->verifier);
4366         if (!status)
4367                 verf->committed = NFS_FILE_SYNC;
4368         return status;
4369 }
4370
4371 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4372 {
4373         __be32 *p;
4374         uint32_t bmlen;
4375         int status;
4376
4377         status = decode_op_hdr(xdr, OP_CREATE);
4378         if (status)
4379                 return status;
4380         if ((status = decode_change_info(xdr, cinfo)))
4381                 return status;
4382         p = xdr_inline_decode(xdr, 4);
4383         if (unlikely(!p))
4384                 return -EIO;
4385         bmlen = be32_to_cpup(p);
4386         p = xdr_inline_decode(xdr, bmlen << 2);
4387         if (likely(p))
4388                 return 0;
4389         return -EIO;
4390 }
4391
4392 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4393 {
4394         unsigned int savep;
4395         uint32_t attrlen, bitmap[3] = {0};
4396         int status;
4397
4398         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4401                 goto xdr_error;
4402         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4403                 goto xdr_error;
4404         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4405                 goto xdr_error;
4406         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4407                                                  &res->fh_expire_type)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4410                 goto xdr_error;
4411         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4412                 goto xdr_error;
4413         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4414                 goto xdr_error;
4415         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4416                                 res->exclcreat_bitmask)) != 0)
4417                 goto xdr_error;
4418         status = verify_attr_len(xdr, savep, attrlen);
4419 xdr_error:
4420         dprintk("%s: xdr returned %d!\n", __func__, -status);
4421         return status;
4422 }
4423
4424 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4425 {
4426         unsigned int savep;
4427         uint32_t attrlen, bitmap[3] = {0};
4428         int status;
4429
4430         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4431                 goto xdr_error;
4432         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4433                 goto xdr_error;
4434         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4435                 goto xdr_error;
4436
4437         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4438                 goto xdr_error;
4439         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4440                 goto xdr_error;
4441         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4442                 goto xdr_error;
4443
4444         status = -EIO;
4445         if (unlikely(bitmap[0]))
4446                 goto xdr_error;
4447
4448         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4449                 goto xdr_error;
4450         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4451                 goto xdr_error;
4452         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4453                 goto xdr_error;
4454
4455         status = verify_attr_len(xdr, savep, attrlen);
4456 xdr_error:
4457         dprintk("%s: xdr returned %d!\n", __func__, -status);
4458         return status;
4459 }
4460
4461 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4462 {
4463         unsigned int savep;
4464         uint32_t attrlen, bitmap[3] = {0};
4465         int status;
4466
4467         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4468                 goto xdr_error;
4469         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4470                 goto xdr_error;
4471         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4472                 goto xdr_error;
4473
4474         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4475                 goto xdr_error;
4476         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4477                 goto xdr_error;
4478
4479         status = verify_attr_len(xdr, savep, attrlen);
4480 xdr_error:
4481         dprintk("%s: xdr returned %d!\n", __func__, -status);
4482         return status;
4483 }
4484
4485 static int decode_threshold_hint(struct xdr_stream *xdr,
4486                                   uint32_t *bitmap,
4487                                   uint64_t *res,
4488                                   uint32_t hint_bit)
4489 {
4490         __be32 *p;
4491
4492         *res = 0;
4493         if (likely(bitmap[0] & hint_bit)) {
4494                 p = xdr_inline_decode(xdr, 8);
4495                 if (unlikely(!p))
4496                         return -EIO;
4497                 xdr_decode_hyper(p, res);
4498         }
4499         return 0;
4500 }
4501
4502 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4503                                         struct nfs4_threshold *res)
4504 {
4505         __be32 *p;
4506         unsigned int savep;
4507         uint32_t bitmap[3] = {0,}, attrlen;
4508         int status;
4509
4510         /* layout type */
4511         p = xdr_inline_decode(xdr, 4);
4512         if (unlikely(!p))
4513                 return -EIO;
4514         res->l_type = be32_to_cpup(p);
4515
4516         /* thi_hintset bitmap */
4517         status = decode_attr_bitmap(xdr, bitmap);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         /* thi_hintlist length */
4522         status = decode_attr_length(xdr, &attrlen, &savep);
4523         if (status < 0)
4524                 goto xdr_error;
4525         /* thi_hintlist */
4526         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4527         if (status < 0)
4528                 goto xdr_error;
4529         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4530         if (status < 0)
4531                 goto xdr_error;
4532         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4533                                        THRESHOLD_RD_IO);
4534         if (status < 0)
4535                 goto xdr_error;
4536         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4537                                        THRESHOLD_WR_IO);
4538         if (status < 0)
4539                 goto xdr_error;
4540
4541         status = verify_attr_len(xdr, savep, attrlen);
4542         res->bm = bitmap[0];
4543
4544         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4545                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4546                 res->wr_io_sz);
4547 xdr_error:
4548         dprintk("%s ret=%d!\n", __func__, status);
4549         return status;
4550 }
4551
4552 /*
4553  * Thresholds on pNFS direct I/O vrs MDS I/O
4554  */
4555 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4556                                     uint32_t *bitmap,
4557                                     struct nfs4_threshold *res)
4558 {
4559         __be32 *p;
4560         int status = 0;
4561         uint32_t num;
4562
4563         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4564                 return -EIO;
4565         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4566                 /* Did the server return an unrequested attribute? */
4567                 if (unlikely(res == NULL))
4568                         return -EREMOTEIO;
4569                 p = xdr_inline_decode(xdr, 4);
4570                 if (unlikely(!p))
4571                         return -EIO;
4572                 num = be32_to_cpup(p);
4573                 if (num == 0)
4574                         return 0;
4575                 if (num > 1)
4576                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4577                                 "drivers per filesystem not supported\n",
4578                                 __func__);
4579
4580                 status = decode_first_threshold_item4(xdr, res);
4581                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4582         }
4583         return status;
4584 }
4585
4586 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4587                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4588                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4589                 const struct nfs_server *server)
4590 {
4591         int status;
4592         umode_t fmode = 0;
4593         uint32_t type;
4594         int32_t err;
4595
4596         status = decode_attr_type(xdr, bitmap, &type);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->mode = 0;
4600         if (status != 0) {
4601                 fattr->mode |= nfs_type2fmt[type];
4602                 fattr->valid |= status;
4603         }
4604
4605         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4606         if (status < 0)
4607                 goto xdr_error;
4608         fattr->valid |= status;
4609
4610         status = decode_attr_size(xdr, bitmap, &fattr->size);
4611         if (status < 0)
4612                 goto xdr_error;
4613         fattr->valid |= status;
4614
4615         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         err = 0;
4621         status = decode_attr_error(xdr, bitmap, &err);
4622         if (status < 0)
4623                 goto xdr_error;
4624
4625         status = decode_attr_filehandle(xdr, bitmap, fh);
4626         if (status < 0)
4627                 goto xdr_error;
4628
4629         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4630         if (status < 0)
4631                 goto xdr_error;
4632         fattr->valid |= status;
4633
4634         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = -EIO;
4640         if (unlikely(bitmap[0]))
4641                 goto xdr_error;
4642
4643         status = decode_attr_mode(xdr, bitmap, &fmode);
4644         if (status < 0)
4645                 goto xdr_error;
4646         if (status != 0) {
4647                 fattr->mode |= fmode;
4648                 fattr->valid |= status;
4649         }
4650
4651         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4652         if (status < 0)
4653                 goto xdr_error;
4654         fattr->valid |= status;
4655
4656         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4657         if (status < 0)
4658                 goto xdr_error;
4659         fattr->valid |= status;
4660
4661         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4662         if (status < 0)
4663                 goto xdr_error;
4664         fattr->valid |= status;
4665
4666         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4667         if (status < 0)
4668                 goto xdr_error;
4669         fattr->valid |= status;
4670
4671         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4672         if (status < 0)
4673                 goto xdr_error;
4674         fattr->valid |= status;
4675
4676         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4677         if (status < 0)
4678                 goto xdr_error;
4679         fattr->valid |= status;
4680
4681         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4682         if (status < 0)
4683                 goto xdr_error;
4684         fattr->valid |= status;
4685
4686         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4687         if (status < 0)
4688                 goto xdr_error;
4689         fattr->valid |= status;
4690
4691         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4692         if (status < 0)
4693                 goto xdr_error;
4694         fattr->valid |= status;
4695
4696         status = -EIO;
4697         if (unlikely(bitmap[1]))
4698                 goto xdr_error;
4699
4700         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4701         if (status < 0)
4702                 goto xdr_error;
4703
4704         if (label) {
4705                 status = decode_attr_security_label(xdr, bitmap, label);
4706                 if (status < 0)
4707                         goto xdr_error;
4708                 fattr->valid |= status;
4709         }
4710
4711 xdr_error:
4712         dprintk("%s: xdr returned %d\n", __func__, -status);
4713         return status;
4714 }
4715
4716 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4717                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4718                 struct nfs4_label *label, const struct nfs_server *server)
4719 {
4720         unsigned int savep;
4721         uint32_t attrlen,
4722                  bitmap[3] = {0};
4723         int status;
4724
4725         status = decode_op_hdr(xdr, OP_GETATTR);
4726         if (status < 0)
4727                 goto xdr_error;
4728
4729         status = decode_attr_bitmap(xdr, bitmap);
4730         if (status < 0)
4731                 goto xdr_error;
4732
4733         status = decode_attr_length(xdr, &attrlen, &savep);
4734         if (status < 0)
4735                 goto xdr_error;
4736
4737         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4738                                         label, server);
4739         if (status < 0)
4740                 goto xdr_error;
4741
4742         status = verify_attr_len(xdr, savep, attrlen);
4743 xdr_error:
4744         dprintk("%s: xdr returned %d\n", __func__, -status);
4745         return status;
4746 }
4747
4748 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4749                 struct nfs4_label *label, const struct nfs_server *server)
4750 {
4751         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4752 }
4753
4754 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4755                 const struct nfs_server *server)
4756 {
4757         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4758 }
4759
4760 /*
4761  * Decode potentially multiple layout types.
4762  */
4763 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4764                                     struct nfs_fsinfo *fsinfo)
4765 {
4766         __be32 *p;
4767         uint32_t i;
4768
4769         p = xdr_inline_decode(xdr, 4);
4770         if (unlikely(!p))
4771                 return -EIO;
4772         fsinfo->nlayouttypes = be32_to_cpup(p);
4773
4774         /* pNFS is not supported by the underlying file system */
4775         if (fsinfo->nlayouttypes == 0)
4776                 return 0;
4777
4778         /* Decode and set first layout type, move xdr->p past unused types */
4779         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4780         if (unlikely(!p))
4781                 return -EIO;
4782
4783         /* If we get too many, then just cap it at the max */
4784         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4785                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4786                         __func__, fsinfo->nlayouttypes);
4787                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4788         }
4789
4790         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4791                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4792         return 0;
4793 }
4794
4795 /*
4796  * The type of file system exported.
4797  * Note we must ensure that layouttype is set in any non-error case.
4798  */
4799 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4800                                 struct nfs_fsinfo *fsinfo)
4801 {
4802         int status = 0;
4803
4804         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4805         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4806                 return -EIO;
4807         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4808                 status = decode_pnfs_layout_types(xdr, fsinfo);
4809                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4810         }
4811         return status;
4812 }
4813
4814 /*
4815  * The prefered block size for layout directed io
4816  */
4817 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4818                                       uint32_t *res)
4819 {
4820         __be32 *p;
4821
4822         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4823         *res = 0;
4824         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4825                 p = xdr_inline_decode(xdr, 4);
4826                 if (unlikely(!p))
4827                         return -EIO;
4828                 *res = be32_to_cpup(p);
4829                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4830         }
4831         return 0;
4832 }
4833
4834 /*
4835  * The granularity of a CLONE operation.
4836  */
4837 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4838                                      uint32_t *res)
4839 {
4840         __be32 *p;
4841
4842         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4843         *res = 0;
4844         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4845                 p = xdr_inline_decode(xdr, 4);
4846                 if (unlikely(!p))
4847                         return -EIO;
4848                 *res = be32_to_cpup(p);
4849                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4850         }
4851         return 0;
4852 }
4853
4854 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4855                                         uint32_t *bitmap,
4856                                         enum nfs4_change_attr_type *res)
4857 {
4858         u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4859
4860         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4861         if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4862                 if (xdr_stream_decode_u32(xdr, &tmp))
4863                         return -EIO;
4864                 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4865         }
4866
4867         switch(tmp) {
4868         case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4869         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4870         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4871         case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4872                 *res = tmp;
4873                 break;
4874         default:
4875                 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4876         }
4877         return 0;
4878 }
4879
4880 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4881 {
4882         unsigned int savep;
4883         uint32_t attrlen, bitmap[3];
4884         int status;
4885
4886         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4887                 goto xdr_error;
4888         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4889                 goto xdr_error;
4890         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4891                 goto xdr_error;
4892
4893         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4894
4895         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4896                 goto xdr_error;
4897         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4898                 goto xdr_error;
4899         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4900                 goto xdr_error;
4901         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4902         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4903                 goto xdr_error;
4904         fsinfo->wtpref = fsinfo->wtmax;
4905
4906         status = -EIO;
4907         if (unlikely(bitmap[0]))
4908                 goto xdr_error;
4909
4910         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4911         if (status != 0)
4912                 goto xdr_error;
4913         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4914         if (status != 0)
4915                 goto xdr_error;
4916
4917         status = -EIO;
4918         if (unlikely(bitmap[1]))
4919                 goto xdr_error;
4920
4921         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4922         if (status)
4923                 goto xdr_error;
4924         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4925         if (status)
4926                 goto xdr_error;
4927
4928         status = decode_attr_change_attr_type(xdr, bitmap,
4929                                               &fsinfo->change_attr_type);
4930         if (status)
4931                 goto xdr_error;
4932
4933         status = decode_attr_xattrsupport(xdr, bitmap,
4934                                           &fsinfo->xattr_support);
4935         if (status)
4936                 goto xdr_error;
4937
4938         status = verify_attr_len(xdr, savep, attrlen);
4939 xdr_error:
4940         dprintk("%s: xdr returned %d!\n", __func__, -status);
4941         return status;
4942 }
4943
4944 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4945 {
4946         __be32 *p;
4947         uint32_t len;
4948         int status;
4949
4950         /* Zero handle first to allow comparisons */
4951         memset(fh, 0, sizeof(*fh));
4952
4953         status = decode_op_hdr(xdr, OP_GETFH);
4954         if (status)
4955                 return status;
4956
4957         p = xdr_inline_decode(xdr, 4);
4958         if (unlikely(!p))
4959                 return -EIO;
4960         len = be32_to_cpup(p);
4961         if (len > NFS4_FHSIZE || len == 0) {
4962                 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
4963                 return -EREMOTEIO;
4964         }
4965         fh->size = len;
4966         p = xdr_inline_decode(xdr, len);
4967         if (unlikely(!p))
4968                 return -EIO;
4969         memcpy(fh->data, p, len);
4970         return 0;
4971 }
4972
4973 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4974 {
4975         int status;
4976
4977         status = decode_op_hdr(xdr, OP_LINK);
4978         if (status)
4979                 return status;
4980         return decode_change_info(xdr, cinfo);
4981 }
4982
4983 /*
4984  * We create the owner, so we know a proper owner.id length is 4.
4985  */
4986 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4987 {
4988         uint64_t offset, length, clientid;
4989         __be32 *p;
4990         uint32_t namelen, type;
4991
4992         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4993         if (unlikely(!p))
4994                 return -EIO;
4995         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4996         p = xdr_decode_hyper(p, &length);
4997         type = be32_to_cpup(p++); /* 4 byte read */
4998         if (fl != NULL) { /* manipulate file lock */
4999                 fl->fl_start = (loff_t)offset;
5000                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5001                 if (length == ~(uint64_t)0)
5002                         fl->fl_end = OFFSET_MAX;
5003                 fl->fl_type = F_WRLCK;
5004                 if (type & 1)
5005                         fl->fl_type = F_RDLCK;
5006                 fl->fl_pid = 0;
5007         }
5008         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5009         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5010         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5011         if (likely(!p))
5012                 return -EIO;
5013         return -NFS4ERR_DENIED;
5014 }
5015
5016 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5017 {
5018         int status;
5019
5020         status = decode_op_hdr(xdr, OP_LOCK);
5021         if (status == -EIO)
5022                 goto out;
5023         if (status == 0) {
5024                 status = decode_lock_stateid(xdr, &res->stateid);
5025                 if (unlikely(status))
5026                         goto out;
5027         } else if (status == -NFS4ERR_DENIED)
5028                 status = decode_lock_denied(xdr, NULL);
5029         if (res->open_seqid != NULL)
5030                 nfs_increment_open_seqid(status, res->open_seqid);
5031         nfs_increment_lock_seqid(status, res->lock_seqid);
5032 out:
5033         return status;
5034 }
5035
5036 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5037 {
5038         int status;
5039         status = decode_op_hdr(xdr, OP_LOCKT);
5040         if (status == -NFS4ERR_DENIED)
5041                 return decode_lock_denied(xdr, res->denied);
5042         return status;
5043 }
5044
5045 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5046 {
5047         int status;
5048
5049         status = decode_op_hdr(xdr, OP_LOCKU);
5050         if (status != -EIO)
5051                 nfs_increment_lock_seqid(status, res->seqid);
5052         if (status == 0)
5053                 status = decode_lock_stateid(xdr, &res->stateid);
5054         return status;
5055 }
5056
5057 static int decode_release_lockowner(struct xdr_stream *xdr)
5058 {
5059         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5060 }
5061
5062 static int decode_lookup(struct xdr_stream *xdr)
5063 {
5064         return decode_op_hdr(xdr, OP_LOOKUP);
5065 }
5066
5067 static int decode_lookupp(struct xdr_stream *xdr)
5068 {
5069         return decode_op_hdr(xdr, OP_LOOKUPP);
5070 }
5071
5072 /* This is too sick! */
5073 static int decode_space_limit(struct xdr_stream *xdr,
5074                 unsigned long *pagemod_limit)
5075 {
5076         __be32 *p;
5077         uint32_t limit_type, nblocks, blocksize;
5078         u64 maxsize = 0;
5079
5080         p = xdr_inline_decode(xdr, 12);
5081         if (unlikely(!p))
5082                 return -EIO;
5083         limit_type = be32_to_cpup(p++);
5084         switch (limit_type) {
5085         case NFS4_LIMIT_SIZE:
5086                 xdr_decode_hyper(p, &maxsize);
5087                 break;
5088         case NFS4_LIMIT_BLOCKS:
5089                 nblocks = be32_to_cpup(p++);
5090                 blocksize = be32_to_cpup(p);
5091                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5092         }
5093         maxsize >>= PAGE_SHIFT;
5094         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5095         return 0;
5096 }
5097
5098 static int decode_rw_delegation(struct xdr_stream *xdr,
5099                 uint32_t delegation_type,
5100                 struct nfs_openres *res)
5101 {
5102         __be32 *p;
5103         int status;
5104
5105         status = decode_delegation_stateid(xdr, &res->delegation);
5106         if (unlikely(status))
5107                 return status;
5108         p = xdr_inline_decode(xdr, 4);
5109         if (unlikely(!p))
5110                 return -EIO;
5111         res->do_recall = be32_to_cpup(p);
5112
5113         switch (delegation_type) {
5114         case NFS4_OPEN_DELEGATE_READ:
5115                 res->delegation_type = FMODE_READ;
5116                 break;
5117         case NFS4_OPEN_DELEGATE_WRITE:
5118                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5119                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5120                                 return -EIO;
5121         }
5122         return decode_ace(xdr, NULL);
5123 }
5124
5125 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5126 {
5127         __be32 *p;
5128         uint32_t why_no_delegation;
5129
5130         p = xdr_inline_decode(xdr, 4);
5131         if (unlikely(!p))
5132                 return -EIO;
5133         why_no_delegation = be32_to_cpup(p);
5134         switch (why_no_delegation) {
5135                 case WND4_CONTENTION:
5136                 case WND4_RESOURCE:
5137                         xdr_inline_decode(xdr, 4);
5138                         /* Ignore for now */
5139         }
5140         return 0;
5141 }
5142
5143 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5144 {
5145         __be32 *p;
5146         uint32_t delegation_type;
5147
5148         p = xdr_inline_decode(xdr, 4);
5149         if (unlikely(!p))
5150                 return -EIO;
5151         delegation_type = be32_to_cpup(p);
5152         res->delegation_type = 0;
5153         switch (delegation_type) {
5154         case NFS4_OPEN_DELEGATE_NONE:
5155                 return 0;
5156         case NFS4_OPEN_DELEGATE_READ:
5157         case NFS4_OPEN_DELEGATE_WRITE:
5158                 return decode_rw_delegation(xdr, delegation_type, res);
5159         case NFS4_OPEN_DELEGATE_NONE_EXT:
5160                 return decode_no_delegation(xdr, res);
5161         }
5162         return -EIO;
5163 }
5164
5165 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5166 {
5167         __be32 *p;
5168         uint32_t savewords, bmlen, i;
5169         int status;
5170
5171         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5172                 return status;
5173         nfs_increment_open_seqid(status, res->seqid);
5174         if (status)
5175                 return status;
5176         status = decode_open_stateid(xdr, &res->stateid);
5177         if (unlikely(status))
5178                 return status;
5179
5180         decode_change_info(xdr, &res->cinfo);
5181
5182         p = xdr_inline_decode(xdr, 8);
5183         if (unlikely(!p))
5184                 return -EIO;
5185         res->rflags = be32_to_cpup(p++);
5186         bmlen = be32_to_cpup(p);
5187         if (bmlen > 10)
5188                 goto xdr_error;
5189
5190         p = xdr_inline_decode(xdr, bmlen << 2);
5191         if (unlikely(!p))
5192                 return -EIO;
5193         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5194         for (i = 0; i < savewords; ++i)
5195                 res->attrset[i] = be32_to_cpup(p++);
5196         for (; i < NFS4_BITMAP_SIZE; i++)
5197                 res->attrset[i] = 0;
5198
5199         return decode_delegation(xdr, res);
5200 xdr_error:
5201         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5202         return -EIO;
5203 }
5204
5205 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5206 {
5207         int status;
5208
5209         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5210         if (status != -EIO)
5211                 nfs_increment_open_seqid(status, res->seqid);
5212         if (!status)
5213                 status = decode_open_stateid(xdr, &res->stateid);
5214         return status;
5215 }
5216
5217 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5218 {
5219         int status;
5220
5221         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5222         if (status != -EIO)
5223                 nfs_increment_open_seqid(status, res->seqid);
5224         if (!status)
5225                 status = decode_open_stateid(xdr, &res->stateid);
5226         return status;
5227 }
5228
5229 static int decode_putfh(struct xdr_stream *xdr)
5230 {
5231         return decode_op_hdr(xdr, OP_PUTFH);
5232 }
5233
5234 static int decode_putrootfh(struct xdr_stream *xdr)
5235 {
5236         return decode_op_hdr(xdr, OP_PUTROOTFH);
5237 }
5238
5239 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5240                        struct nfs_pgio_res *res)
5241 {
5242         __be32 *p;
5243         uint32_t count, eof, recvd;
5244         int status;
5245
5246         status = decode_op_hdr(xdr, OP_READ);
5247         if (status)
5248                 return status;
5249         p = xdr_inline_decode(xdr, 8);
5250         if (unlikely(!p))
5251                 return -EIO;
5252         eof = be32_to_cpup(p++);
5253         count = be32_to_cpup(p);
5254         recvd = xdr_read_pages(xdr, count);
5255         if (count > recvd) {
5256                 dprintk("NFS: server cheating in read reply: "
5257                                 "count %u > recvd %u\n", count, recvd);
5258                 count = recvd;
5259                 eof = 0;
5260         }
5261         res->eof = eof;
5262         res->count = count;
5263         return 0;
5264 }
5265
5266 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5267 {
5268         int             status;
5269         __be32          verf[2];
5270
5271         status = decode_op_hdr(xdr, OP_READDIR);
5272         if (!status)
5273                 status = decode_verifier(xdr, readdir->verifier.data);
5274         if (unlikely(status))
5275                 return status;
5276         memcpy(verf, readdir->verifier.data, sizeof(verf));
5277         dprintk("%s: verifier = %08x:%08x\n",
5278                         __func__, verf[0], verf[1]);
5279         return xdr_read_pages(xdr, xdr->buf->page_len);
5280 }
5281
5282 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5283 {
5284         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5285         u32 len, recvd;
5286         __be32 *p;
5287         int status;
5288
5289         status = decode_op_hdr(xdr, OP_READLINK);
5290         if (status)
5291                 return status;
5292
5293         /* Convert length of symlink */
5294         p = xdr_inline_decode(xdr, 4);
5295         if (unlikely(!p))
5296                 return -EIO;
5297         len = be32_to_cpup(p);
5298         if (len >= rcvbuf->page_len || len <= 0) {
5299                 dprintk("nfs: server returned giant symlink!\n");
5300                 return -ENAMETOOLONG;
5301         }
5302         recvd = xdr_read_pages(xdr, len);
5303         if (recvd < len) {
5304                 dprintk("NFS: server cheating in readlink reply: "
5305                                 "count %u > recvd %u\n", len, recvd);
5306                 return -EIO;
5307         }
5308         /*
5309          * The XDR encode routine has set things up so that
5310          * the link text will be copied directly into the
5311          * buffer.  We just have to do overflow-checking,
5312          * and null-terminate the text (the VFS expects
5313          * null-termination).
5314          */
5315         xdr_terminate_string(rcvbuf, len);
5316         return 0;
5317 }
5318
5319 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5320 {
5321         int status;
5322
5323         status = decode_op_hdr(xdr, OP_REMOVE);
5324         if (status)
5325                 goto out;
5326         status = decode_change_info(xdr, cinfo);
5327 out:
5328         return status;
5329 }
5330
5331 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5332               struct nfs4_change_info *new_cinfo)
5333 {
5334         int status;
5335
5336         status = decode_op_hdr(xdr, OP_RENAME);
5337         if (status)
5338                 goto out;
5339         if ((status = decode_change_info(xdr, old_cinfo)))
5340                 goto out;
5341         status = decode_change_info(xdr, new_cinfo);
5342 out:
5343         return status;
5344 }
5345
5346 static int decode_renew(struct xdr_stream *xdr)
5347 {
5348         return decode_op_hdr(xdr, OP_RENEW);
5349 }
5350
5351 static int
5352 decode_restorefh(struct xdr_stream *xdr)
5353 {
5354         return decode_op_hdr(xdr, OP_RESTOREFH);
5355 }
5356
5357 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5358                          struct nfs_getaclres *res)
5359 {
5360         unsigned int savep;
5361         uint32_t attrlen,
5362                  bitmap[3] = {0};
5363         int status;
5364
5365         res->acl_len = 0;
5366         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5367                 goto out;
5368
5369         xdr_enter_page(xdr, xdr->buf->page_len);
5370
5371         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5372                 goto out;
5373         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5374                 goto out;
5375
5376         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5377                 return -EIO;
5378         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5379
5380                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5381                  * are stored with the acl data to handle the problem of
5382                  * variable length bitmaps.*/
5383                 res->acl_data_offset = xdr_page_pos(xdr);
5384                 res->acl_len = attrlen;
5385
5386                 /* Check for receive buffer overflow */
5387                 if (res->acl_len > xdr_stream_remaining(xdr) ||
5388                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5389                         res->acl_flags |= NFS4_ACL_TRUNC;
5390                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5391                                 attrlen, xdr_stream_remaining(xdr));
5392                 }
5393         } else
5394                 status = -EOPNOTSUPP;
5395
5396 out:
5397         return status;
5398 }
5399
5400 static int
5401 decode_savefh(struct xdr_stream *xdr)
5402 {
5403         return decode_op_hdr(xdr, OP_SAVEFH);
5404 }
5405
5406 static int decode_setattr(struct xdr_stream *xdr)
5407 {
5408         int status;
5409
5410         status = decode_op_hdr(xdr, OP_SETATTR);
5411         if (status)
5412                 return status;
5413         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5414                 return 0;
5415         return -EIO;
5416 }
5417
5418 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5419 {
5420         __be32 *p;
5421         uint32_t opnum;
5422         int32_t nfserr;
5423
5424         p = xdr_inline_decode(xdr, 8);
5425         if (unlikely(!p))
5426                 return -EIO;
5427         opnum = be32_to_cpup(p++);
5428         if (opnum != OP_SETCLIENTID) {
5429                 dprintk("nfs: decode_setclientid: Server returned operation"
5430                         " %d\n", opnum);
5431                 return -EIO;
5432         }
5433         nfserr = be32_to_cpup(p);
5434         if (nfserr == NFS_OK) {
5435                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5436                 if (unlikely(!p))
5437                         return -EIO;
5438                 p = xdr_decode_hyper(p, &res->clientid);
5439                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5440         } else if (nfserr == NFSERR_CLID_INUSE) {
5441                 uint32_t len;
5442
5443                 /* skip netid string */
5444                 p = xdr_inline_decode(xdr, 4);
5445                 if (unlikely(!p))
5446                         return -EIO;
5447                 len = be32_to_cpup(p);
5448                 p = xdr_inline_decode(xdr, len);
5449                 if (unlikely(!p))
5450                         return -EIO;
5451
5452                 /* skip uaddr string */
5453                 p = xdr_inline_decode(xdr, 4);
5454                 if (unlikely(!p))
5455                         return -EIO;
5456                 len = be32_to_cpup(p);
5457                 p = xdr_inline_decode(xdr, len);
5458                 if (unlikely(!p))
5459                         return -EIO;
5460                 return -NFSERR_CLID_INUSE;
5461         } else
5462                 return nfs4_stat_to_errno(nfserr);
5463
5464         return 0;
5465 }
5466
5467 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5468 {
5469         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5470 }
5471
5472 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5473 {
5474         __be32 *p;
5475         int status;
5476
5477         status = decode_op_hdr(xdr, OP_WRITE);
5478         if (status)
5479                 return status;
5480
5481         p = xdr_inline_decode(xdr, 8);
5482         if (unlikely(!p))
5483                 return -EIO;
5484         res->count = be32_to_cpup(p++);
5485         res->verf->committed = be32_to_cpup(p++);
5486         return decode_write_verifier(xdr, &res->verf->verifier);
5487 }
5488
5489 static int decode_delegreturn(struct xdr_stream *xdr)
5490 {
5491         return decode_op_hdr(xdr, OP_DELEGRETURN);
5492 }
5493
5494 static int decode_secinfo_gss(struct xdr_stream *xdr,
5495                               struct nfs4_secinfo4 *flavor)
5496 {
5497         u32 oid_len;
5498         __be32 *p;
5499
5500         p = xdr_inline_decode(xdr, 4);
5501         if (unlikely(!p))
5502                 return -EIO;
5503         oid_len = be32_to_cpup(p);
5504         if (oid_len > GSS_OID_MAX_LEN)
5505                 return -EINVAL;
5506
5507         p = xdr_inline_decode(xdr, oid_len);
5508         if (unlikely(!p))
5509                 return -EIO;
5510         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5511         flavor->flavor_info.oid.len = oid_len;
5512
5513         p = xdr_inline_decode(xdr, 8);
5514         if (unlikely(!p))
5515                 return -EIO;
5516         flavor->flavor_info.qop = be32_to_cpup(p++);
5517         flavor->flavor_info.service = be32_to_cpup(p);
5518
5519         return 0;
5520 }
5521
5522 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5523 {
5524         struct nfs4_secinfo4 *sec_flavor;
5525         unsigned int i, num_flavors;
5526         int status;
5527         __be32 *p;
5528
5529         p = xdr_inline_decode(xdr, 4);
5530         if (unlikely(!p))
5531                 return -EIO;
5532
5533         res->flavors->num_flavors = 0;
5534         num_flavors = be32_to_cpup(p);
5535
5536         for (i = 0; i < num_flavors; i++) {
5537                 sec_flavor = &res->flavors->flavors[i];
5538                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5539                         break;
5540
5541                 p = xdr_inline_decode(xdr, 4);
5542                 if (unlikely(!p))
5543                         return -EIO;
5544                 sec_flavor->flavor = be32_to_cpup(p);
5545
5546                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5547                         status = decode_secinfo_gss(xdr, sec_flavor);
5548                         if (status)
5549                                 goto out;
5550                 }
5551                 res->flavors->num_flavors++;
5552         }
5553
5554         status = 0;
5555 out:
5556         return status;
5557 }
5558
5559 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5560 {
5561         int status = decode_op_hdr(xdr, OP_SECINFO);
5562         if (status)
5563                 return status;
5564         return decode_secinfo_common(xdr, res);
5565 }
5566
5567 #if defined(CONFIG_NFS_V4_1)
5568 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5569 {
5570         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5571         if (status)
5572                 return status;
5573         return decode_secinfo_common(xdr, res);
5574 }
5575
5576 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5577 {
5578         if (xdr_stream_decode_uint32_array(xdr, op_map->u.words,
5579                                            ARRAY_SIZE(op_map->u.words)) < 0)
5580                 return -EIO;
5581         return 0;
5582 }
5583
5584 static int decode_exchange_id(struct xdr_stream *xdr,
5585                               struct nfs41_exchange_id_res *res)
5586 {
5587         __be32 *p;
5588         uint32_t dummy;
5589         char *dummy_str;
5590         int status;
5591         uint32_t impl_id_count;
5592
5593         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5594         if (status)
5595                 return status;
5596
5597         p = xdr_inline_decode(xdr, 8);
5598         if (unlikely(!p))
5599                 return -EIO;
5600         xdr_decode_hyper(p, &res->clientid);
5601         p = xdr_inline_decode(xdr, 12);
5602         if (unlikely(!p))
5603                 return -EIO;
5604         res->seqid = be32_to_cpup(p++);
5605         res->flags = be32_to_cpup(p++);
5606
5607         res->state_protect.how = be32_to_cpup(p);
5608         switch (res->state_protect.how) {
5609         case SP4_NONE:
5610                 break;
5611         case SP4_MACH_CRED:
5612                 status = decode_op_map(xdr, &res->state_protect.enforce);
5613                 if (status)
5614                         return status;
5615                 status = decode_op_map(xdr, &res->state_protect.allow);
5616                 if (status)
5617                         return status;
5618                 break;
5619         default:
5620                 WARN_ON_ONCE(1);
5621                 return -EIO;
5622         }
5623
5624         /* server_owner4.so_minor_id */
5625         p = xdr_inline_decode(xdr, 8);
5626         if (unlikely(!p))
5627                 return -EIO;
5628         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5629
5630         /* server_owner4.so_major_id */
5631         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5632         if (unlikely(status))
5633                 return status;
5634         memcpy(res->server_owner->major_id, dummy_str, dummy);
5635         res->server_owner->major_id_sz = dummy;
5636
5637         /* server_scope4 */
5638         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5639         if (unlikely(status))
5640                 return status;
5641         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5642         res->server_scope->server_scope_sz = dummy;
5643
5644         /* Implementation Id */
5645         p = xdr_inline_decode(xdr, 4);
5646         if (unlikely(!p))
5647                 return -EIO;
5648         impl_id_count = be32_to_cpup(p++);
5649
5650         if (impl_id_count) {
5651                 /* nii_domain */
5652                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5653                 if (unlikely(status))
5654                         return status;
5655                 memcpy(res->impl_id->domain, dummy_str, dummy);
5656
5657                 /* nii_name */
5658                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5659                 if (unlikely(status))
5660                         return status;
5661                 memcpy(res->impl_id->name, dummy_str, dummy);
5662
5663                 /* nii_date */
5664                 p = xdr_inline_decode(xdr, 12);
5665                 if (unlikely(!p))
5666                         return -EIO;
5667                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5668                 res->impl_id->date.nseconds = be32_to_cpup(p);
5669
5670                 /* if there's more than one entry, ignore the rest */
5671         }
5672         return 0;
5673 }
5674
5675 static int decode_chan_attrs(struct xdr_stream *xdr,
5676                              struct nfs4_channel_attrs *attrs)
5677 {
5678         __be32 *p;
5679         u32 nr_attrs, val;
5680
5681         p = xdr_inline_decode(xdr, 28);
5682         if (unlikely(!p))
5683                 return -EIO;
5684         val = be32_to_cpup(p++);        /* headerpadsz */
5685         if (val)
5686                 return -EINVAL;         /* no support for header padding yet */
5687         attrs->max_rqst_sz = be32_to_cpup(p++);
5688         attrs->max_resp_sz = be32_to_cpup(p++);
5689         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5690         attrs->max_ops = be32_to_cpup(p++);
5691         attrs->max_reqs = be32_to_cpup(p++);
5692         nr_attrs = be32_to_cpup(p);
5693         if (unlikely(nr_attrs > 1)) {
5694                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5695                         "count %u\n", __func__, nr_attrs);
5696                 return -EINVAL;
5697         }
5698         if (nr_attrs == 1) {
5699                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5700                 if (unlikely(!p))
5701                         return -EIO;
5702         }
5703         return 0;
5704 }
5705
5706 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5707 {
5708         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5709 }
5710
5711 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5712                                 struct nfs41_bind_conn_to_session_res *res)
5713 {
5714         __be32 *p;
5715         int status;
5716
5717         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5718         if (!status)
5719                 status = decode_sessionid(xdr, &res->sessionid);
5720         if (unlikely(status))
5721                 return status;
5722
5723         /* dir flags, rdma mode bool */
5724         p = xdr_inline_decode(xdr, 8);
5725         if (unlikely(!p))
5726                 return -EIO;
5727
5728         res->dir = be32_to_cpup(p++);
5729         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5730                 return -EIO;
5731         if (be32_to_cpup(p) == 0)
5732                 res->use_conn_in_rdma_mode = false;
5733         else
5734                 res->use_conn_in_rdma_mode = true;
5735
5736         return 0;
5737 }
5738
5739 static int decode_create_session(struct xdr_stream *xdr,
5740                                  struct nfs41_create_session_res *res)
5741 {
5742         __be32 *p;
5743         int status;
5744
5745         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5746         if (!status)
5747                 status = decode_sessionid(xdr, &res->sessionid);
5748         if (unlikely(status))
5749                 return status;
5750
5751         /* seqid, flags */
5752         p = xdr_inline_decode(xdr, 8);
5753         if (unlikely(!p))
5754                 return -EIO;
5755         res->seqid = be32_to_cpup(p++);
5756         res->flags = be32_to_cpup(p);
5757
5758         /* Channel attributes */
5759         status = decode_chan_attrs(xdr, &res->fc_attrs);
5760         if (!status)
5761                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5762         return status;
5763 }
5764
5765 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5766 {
5767         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5768 }
5769
5770 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5771 {
5772         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5773 }
5774
5775 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5776 {
5777         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5778 }
5779 #endif /* CONFIG_NFS_V4_1 */
5780
5781 static int decode_sequence(struct xdr_stream *xdr,
5782                            struct nfs4_sequence_res *res,
5783                            struct rpc_rqst *rqstp)
5784 {
5785 #if defined(CONFIG_NFS_V4_1)
5786         struct nfs4_session *session;
5787         struct nfs4_sessionid id;
5788         u32 dummy;
5789         int status;
5790         __be32 *p;
5791
5792         if (res->sr_slot == NULL)
5793                 return 0;
5794         if (!res->sr_slot->table->session)
5795                 return 0;
5796
5797         status = decode_op_hdr(xdr, OP_SEQUENCE);
5798         if (!status)
5799                 status = decode_sessionid(xdr, &id);
5800         if (unlikely(status))
5801                 goto out_err;
5802
5803         /*
5804          * If the server returns different values for sessionID, slotID or
5805          * sequence number, the server is looney tunes.
5806          */
5807         status = -EREMOTEIO;
5808         session = res->sr_slot->table->session;
5809
5810         if (memcmp(id.data, session->sess_id.data,
5811                    NFS4_MAX_SESSIONID_LEN)) {
5812                 dprintk("%s Invalid session id\n", __func__);
5813                 goto out_err;
5814         }
5815
5816         p = xdr_inline_decode(xdr, 20);
5817         if (unlikely(!p))
5818                 goto out_overflow;
5819
5820         /* seqid */
5821         dummy = be32_to_cpup(p++);
5822         if (dummy != res->sr_slot->seq_nr) {
5823                 dprintk("%s Invalid sequence number\n", __func__);
5824                 goto out_err;
5825         }
5826         /* slot id */
5827         dummy = be32_to_cpup(p++);
5828         if (dummy != res->sr_slot->slot_nr) {
5829                 dprintk("%s Invalid slot id\n", __func__);
5830                 goto out_err;
5831         }
5832         /* highest slot id */
5833         res->sr_highest_slotid = be32_to_cpup(p++);
5834         /* target highest slot id */
5835         res->sr_target_highest_slotid = be32_to_cpup(p++);
5836         /* result flags */
5837         res->sr_status_flags = be32_to_cpup(p);
5838         status = 0;
5839 out_err:
5840         res->sr_status = status;
5841         return status;
5842 out_overflow:
5843         status = -EIO;
5844         goto out_err;
5845 #else  /* CONFIG_NFS_V4_1 */
5846         return 0;
5847 #endif /* CONFIG_NFS_V4_1 */
5848 }
5849
5850 #if defined(CONFIG_NFS_V4_1)
5851 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5852 {
5853         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5854         return decode_stateid(xdr, stateid);
5855 }
5856
5857 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5858                                 struct nfs4_getdeviceinfo_res *res)
5859 {
5860         struct pnfs_device *pdev = res->pdev;
5861         __be32 *p;
5862         uint32_t len, type;
5863         int status;
5864
5865         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5866         if (status) {
5867                 if (status == -ETOOSMALL) {
5868                         p = xdr_inline_decode(xdr, 4);
5869                         if (unlikely(!p))
5870                                 return -EIO;
5871                         pdev->mincount = be32_to_cpup(p);
5872                         dprintk("%s: Min count too small. mincnt = %u\n",
5873                                 __func__, pdev->mincount);
5874                 }
5875                 return status;
5876         }
5877
5878         p = xdr_inline_decode(xdr, 8);
5879         if (unlikely(!p))
5880                 return -EIO;
5881         type = be32_to_cpup(p++);
5882         if (type != pdev->layout_type) {
5883                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5884                         __func__, pdev->layout_type, type);
5885                 return -EINVAL;
5886         }
5887         /*
5888          * Get the length of the opaque device_addr4. xdr_read_pages places
5889          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5890          * and places the remaining xdr data in xdr_buf->tail
5891          */
5892         pdev->mincount = be32_to_cpup(p);
5893         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5894                 return -EIO;
5895
5896         /* Parse notification bitmap, verifying that it is zero. */
5897         p = xdr_inline_decode(xdr, 4);
5898         if (unlikely(!p))
5899                 return -EIO;
5900         len = be32_to_cpup(p);
5901         if (len) {
5902                 uint32_t i;
5903
5904                 p = xdr_inline_decode(xdr, 4 * len);
5905                 if (unlikely(!p))
5906                         return -EIO;
5907
5908                 res->notification = be32_to_cpup(p++);
5909                 for (i = 1; i < len; i++) {
5910                         if (be32_to_cpup(p++)) {
5911                                 dprintk("%s: unsupported notification\n",
5912                                         __func__);
5913                                 return -EIO;
5914                         }
5915                 }
5916         }
5917         return 0;
5918 }
5919
5920 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5921                             struct nfs4_layoutget_res *res)
5922 {
5923         __be32 *p;
5924         int status;
5925         u32 layout_count;
5926         u32 recvd;
5927
5928         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5929         if (status)
5930                 goto out;
5931         p = xdr_inline_decode(xdr, 4);
5932         if (unlikely(!p))
5933                 goto out_overflow;
5934         res->return_on_close = be32_to_cpup(p);
5935         decode_layout_stateid(xdr, &res->stateid);
5936         p = xdr_inline_decode(xdr, 4);
5937         if (unlikely(!p))
5938                 goto out_overflow;
5939         layout_count = be32_to_cpup(p);
5940         if (!layout_count) {
5941                 dprintk("%s: server responded with empty layout array\n",
5942                         __func__);
5943                 status = -EINVAL;
5944                 goto out;
5945         }
5946
5947         p = xdr_inline_decode(xdr, 28);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         p = xdr_decode_hyper(p, &res->range.offset);
5951         p = xdr_decode_hyper(p, &res->range.length);
5952         res->range.iomode = be32_to_cpup(p++);
5953         res->type = be32_to_cpup(p++);
5954         res->layoutp->len = be32_to_cpup(p);
5955
5956         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5957                 __func__,
5958                 (unsigned long)res->range.offset,
5959                 (unsigned long)res->range.length,
5960                 res->range.iomode,
5961                 res->type,
5962                 res->layoutp->len);
5963
5964         recvd = xdr_read_pages(xdr, res->layoutp->len);
5965         if (res->layoutp->len > recvd) {
5966                 dprintk("NFS: server cheating in layoutget reply: "
5967                                 "layout len %u > recvd %u\n",
5968                                 res->layoutp->len, recvd);
5969                 status = -EINVAL;
5970                 goto out;
5971         }
5972
5973         if (layout_count > 1) {
5974                 /* We only handle a length one array at the moment.  Any
5975                  * further entries are just ignored.  Note that this means
5976                  * the client may see a response that is less than the
5977                  * minimum it requested.
5978                  */
5979                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5980                         __func__, layout_count);
5981         }
5982
5983 out:
5984         res->status = status;
5985         return status;
5986 out_overflow:
5987         status = -EIO;
5988         goto out;
5989 }
5990
5991 static int decode_layoutreturn(struct xdr_stream *xdr,
5992                                struct nfs4_layoutreturn_res *res)
5993 {
5994         __be32 *p;
5995         int status;
5996
5997         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5998         if (status)
5999                 return status;
6000         p = xdr_inline_decode(xdr, 4);
6001         if (unlikely(!p))
6002                 return -EIO;
6003         res->lrs_present = be32_to_cpup(p);
6004         if (res->lrs_present)
6005                 status = decode_layout_stateid(xdr, &res->stateid);
6006         else
6007                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6008         return status;
6009 }
6010
6011 static int decode_layoutcommit(struct xdr_stream *xdr,
6012                                struct rpc_rqst *req,
6013                                struct nfs4_layoutcommit_res *res)
6014 {
6015         __be32 *p;
6016         __u32 sizechanged;
6017         int status;
6018
6019         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6020         res->status = status;
6021         if (status)
6022                 return status;
6023
6024         p = xdr_inline_decode(xdr, 4);
6025         if (unlikely(!p))
6026                 return -EIO;
6027         sizechanged = be32_to_cpup(p);
6028
6029         if (sizechanged) {
6030                 /* throw away new size */
6031                 p = xdr_inline_decode(xdr, 8);
6032                 if (unlikely(!p))
6033                         return -EIO;
6034         }
6035         return 0;
6036 }
6037
6038 static int decode_test_stateid(struct xdr_stream *xdr,
6039                                struct nfs41_test_stateid_res *res)
6040 {
6041         __be32 *p;
6042         int status;
6043         int num_res;
6044
6045         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6046         if (status)
6047                 return status;
6048
6049         p = xdr_inline_decode(xdr, 4);
6050         if (unlikely(!p))
6051                 return -EIO;
6052         num_res = be32_to_cpup(p++);
6053         if (num_res != 1)
6054                 return -EIO;
6055
6056         p = xdr_inline_decode(xdr, 4);
6057         if (unlikely(!p))
6058                 return -EIO;
6059         res->status = be32_to_cpup(p++);
6060
6061         return status;
6062 }
6063
6064 static int decode_free_stateid(struct xdr_stream *xdr,
6065                                struct nfs41_free_stateid_res *res)
6066 {
6067         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6068         return res->status;
6069 }
6070 #else
6071 static inline
6072 int decode_layoutreturn(struct xdr_stream *xdr,
6073                                struct nfs4_layoutreturn_res *res)
6074 {
6075         return 0;
6076 }
6077
6078 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6079                             struct nfs4_layoutget_res *res)
6080 {
6081         return 0;
6082 }
6083
6084 #endif /* CONFIG_NFS_V4_1 */
6085
6086 /*
6087  * END OF "GENERIC" DECODE ROUTINES.
6088  */
6089
6090 /*
6091  * Decode OPEN_DOWNGRADE response
6092  */
6093 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6094                                        struct xdr_stream *xdr,
6095                                        void *data)
6096 {
6097         struct nfs_closeres *res = data;
6098         struct compound_hdr hdr;
6099         int status;
6100
6101         status = decode_compound_hdr(xdr, &hdr);
6102         if (status)
6103                 goto out;
6104         status = decode_sequence(xdr, &res->seq_res, rqstp);
6105         if (status)
6106                 goto out;
6107         status = decode_putfh(xdr);
6108         if (status)
6109                 goto out;
6110         if (res->lr_res) {
6111                 status = decode_layoutreturn(xdr, res->lr_res);
6112                 res->lr_ret = status;
6113                 if (status)
6114                         goto out;
6115         }
6116         status = decode_open_downgrade(xdr, res);
6117 out:
6118         return status;
6119 }
6120
6121 /*
6122  * Decode ACCESS response
6123  */
6124 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6125                                void *data)
6126 {
6127         struct nfs4_accessres *res = data;
6128         struct compound_hdr hdr;
6129         int status;
6130
6131         status = decode_compound_hdr(xdr, &hdr);
6132         if (status)
6133                 goto out;
6134         status = decode_sequence(xdr, &res->seq_res, rqstp);
6135         if (status)
6136                 goto out;
6137         status = decode_putfh(xdr);
6138         if (status != 0)
6139                 goto out;
6140         status = decode_access(xdr, &res->supported, &res->access);
6141         if (status != 0)
6142                 goto out;
6143         if (res->fattr)
6144                 decode_getfattr(xdr, res->fattr, res->server);
6145 out:
6146         return status;
6147 }
6148
6149 /*
6150  * Decode LOOKUP response
6151  */
6152 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6153                                void *data)
6154 {
6155         struct nfs4_lookup_res *res = data;
6156         struct compound_hdr hdr;
6157         int status;
6158
6159         status = decode_compound_hdr(xdr, &hdr);
6160         if (status)
6161                 goto out;
6162         status = decode_sequence(xdr, &res->seq_res, rqstp);
6163         if (status)
6164                 goto out;
6165         status = decode_putfh(xdr);
6166         if (status)
6167                 goto out;
6168         status = decode_lookup(xdr);
6169         if (status)
6170                 goto out;
6171         status = decode_getfh(xdr, res->fh);
6172         if (status)
6173                 goto out;
6174         status = decode_getfattr_label(xdr, res->fattr, res->fattr->label, res->server);
6175 out:
6176         return status;
6177 }
6178
6179 /*
6180  * Decode LOOKUPP response
6181  */
6182 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6183                 void *data)
6184 {
6185         struct nfs4_lookupp_res *res = data;
6186         struct compound_hdr hdr;
6187         int status;
6188
6189         status = decode_compound_hdr(xdr, &hdr);
6190         if (status)
6191                 goto out;
6192         status = decode_sequence(xdr, &res->seq_res, rqstp);
6193         if (status)
6194                 goto out;
6195         status = decode_putfh(xdr);
6196         if (status)
6197                 goto out;
6198         status = decode_lookupp(xdr);
6199         if (status)
6200                 goto out;
6201         status = decode_getfh(xdr, res->fh);
6202         if (status)
6203                 goto out;
6204         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6205 out:
6206         return status;
6207 }
6208
6209 /*
6210  * Decode LOOKUP_ROOT response
6211  */
6212 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6213                                     struct xdr_stream *xdr,
6214                                     void *data)
6215 {
6216         struct nfs4_lookup_res *res = data;
6217         struct compound_hdr hdr;
6218         int status;
6219
6220         status = decode_compound_hdr(xdr, &hdr);
6221         if (status)
6222                 goto out;
6223         status = decode_sequence(xdr, &res->seq_res, rqstp);
6224         if (status)
6225                 goto out;
6226         status = decode_putrootfh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_getfh(xdr, res->fh);
6230         if (status == 0)
6231                 status = decode_getfattr_label(xdr, res->fattr,
6232                                                 res->fattr->label, res->server);
6233 out:
6234         return status;
6235 }
6236
6237 /*
6238  * Decode REMOVE response
6239  */
6240 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241                                void *data)
6242 {
6243         struct nfs_removeres *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)
6255                 goto out;
6256         status = decode_remove(xdr, &res->cinfo);
6257 out:
6258         return status;
6259 }
6260
6261 /*
6262  * Decode RENAME response
6263  */
6264 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6265                                void *data)
6266 {
6267         struct nfs_renameres *res = data;
6268         struct compound_hdr hdr;
6269         int status;
6270
6271         status = decode_compound_hdr(xdr, &hdr);
6272         if (status)
6273                 goto out;
6274         status = decode_sequence(xdr, &res->seq_res, rqstp);
6275         if (status)
6276                 goto out;
6277         status = decode_putfh(xdr);
6278         if (status)
6279                 goto out;
6280         status = decode_savefh(xdr);
6281         if (status)
6282                 goto out;
6283         status = decode_putfh(xdr);
6284         if (status)
6285                 goto out;
6286         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6287 out:
6288         return status;
6289 }
6290
6291 /*
6292  * Decode LINK response
6293  */
6294 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6295                              void *data)
6296 {
6297         struct nfs4_link_res *res = data;
6298         struct compound_hdr hdr;
6299         int status;
6300
6301         status = decode_compound_hdr(xdr, &hdr);
6302         if (status)
6303                 goto out;
6304         status = decode_sequence(xdr, &res->seq_res, rqstp);
6305         if (status)
6306                 goto out;
6307         status = decode_putfh(xdr);
6308         if (status)
6309                 goto out;
6310         status = decode_savefh(xdr);
6311         if (status)
6312                 goto out;
6313         status = decode_putfh(xdr);
6314         if (status)
6315                 goto out;
6316         status = decode_link(xdr, &res->cinfo);
6317         if (status)
6318                 goto out;
6319         /*
6320          * Note order: OP_LINK leaves the directory as the current
6321          *             filehandle.
6322          */
6323         status = decode_restorefh(xdr);
6324         if (status)
6325                 goto out;
6326         decode_getfattr_label(xdr, res->fattr, res->fattr->label, res->server);
6327 out:
6328         return status;
6329 }
6330
6331 /*
6332  * Decode CREATE response
6333  */
6334 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6335                                void *data)
6336 {
6337         struct nfs4_create_res *res = data;
6338         struct compound_hdr hdr;
6339         int status;
6340
6341         status = decode_compound_hdr(xdr, &hdr);
6342         if (status)
6343                 goto out;
6344         status = decode_sequence(xdr, &res->seq_res, rqstp);
6345         if (status)
6346                 goto out;
6347         status = decode_putfh(xdr);
6348         if (status)
6349                 goto out;
6350         status = decode_create(xdr, &res->dir_cinfo);
6351         if (status)
6352                 goto out;
6353         status = decode_getfh(xdr, res->fh);
6354         if (status)
6355                 goto out;
6356         decode_getfattr_label(xdr, res->fattr, res->fattr->label, res->server);
6357 out:
6358         return status;
6359 }
6360
6361 /*
6362  * Decode SYMLINK response
6363  */
6364 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6365                                 void *res)
6366 {
6367         return nfs4_xdr_dec_create(rqstp, xdr, res);
6368 }
6369
6370 /*
6371  * Decode GETATTR response
6372  */
6373 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374                                 void *data)
6375 {
6376         struct nfs4_getattr_res *res = data;
6377         struct compound_hdr hdr;
6378         int status;
6379
6380         status = decode_compound_hdr(xdr, &hdr);
6381         if (status)
6382                 goto out;
6383         status = decode_sequence(xdr, &res->seq_res, rqstp);
6384         if (status)
6385                 goto out;
6386         status = decode_putfh(xdr);
6387         if (status)
6388                 goto out;
6389         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6390 out:
6391         return status;
6392 }
6393
6394 /*
6395  * Encode an SETACL request
6396  */
6397 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6398                                 const void *data)
6399 {
6400         const struct nfs_setaclargs *args = data;
6401         struct compound_hdr hdr = {
6402                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6403         };
6404
6405         encode_compound_hdr(xdr, req, &hdr);
6406         encode_sequence(xdr, &args->seq_args, &hdr);
6407         encode_putfh(xdr, args->fh, &hdr);
6408         encode_setacl(xdr, args, &hdr);
6409         encode_nops(&hdr);
6410 }
6411
6412 /*
6413  * Decode SETACL response
6414  */
6415 static int
6416 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6417                     void *data)
6418 {
6419         struct nfs_setaclres *res = data;
6420         struct compound_hdr hdr;
6421         int status;
6422
6423         status = decode_compound_hdr(xdr, &hdr);
6424         if (status)
6425                 goto out;
6426         status = decode_sequence(xdr, &res->seq_res, rqstp);
6427         if (status)
6428                 goto out;
6429         status = decode_putfh(xdr);
6430         if (status)
6431                 goto out;
6432         status = decode_setattr(xdr);
6433 out:
6434         return status;
6435 }
6436
6437 /*
6438  * Decode GETACL response
6439  */
6440 static int
6441 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6442                     void *data)
6443 {
6444         struct nfs_getaclres *res = data;
6445         struct compound_hdr hdr;
6446         int status;
6447
6448         if (res->acl_scratch != NULL)
6449                 xdr_set_scratch_page(xdr, res->acl_scratch);
6450         status = decode_compound_hdr(xdr, &hdr);
6451         if (status)
6452                 goto out;
6453         status = decode_sequence(xdr, &res->seq_res, rqstp);
6454         if (status)
6455                 goto out;
6456         status = decode_putfh(xdr);
6457         if (status)
6458                 goto out;
6459         status = decode_getacl(xdr, rqstp, res);
6460
6461 out:
6462         return status;
6463 }
6464
6465 /*
6466  * Decode CLOSE response
6467  */
6468 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6469                               void *data)
6470 {
6471         struct nfs_closeres *res = data;
6472         struct compound_hdr hdr;
6473         int status;
6474
6475         status = decode_compound_hdr(xdr, &hdr);
6476         if (status)
6477                 goto out;
6478         status = decode_sequence(xdr, &res->seq_res, rqstp);
6479         if (status)
6480                 goto out;
6481         status = decode_putfh(xdr);
6482         if (status)
6483                 goto out;
6484         if (res->lr_res) {
6485                 status = decode_layoutreturn(xdr, res->lr_res);
6486                 res->lr_ret = status;
6487                 if (status)
6488                         goto out;
6489         }
6490         if (res->fattr != NULL) {
6491                 status = decode_getfattr(xdr, res->fattr, res->server);
6492                 if (status != 0)
6493                         goto out;
6494         }
6495         status = decode_close(xdr, res);
6496 out:
6497         return status;
6498 }
6499
6500 /*
6501  * Decode OPEN response
6502  */
6503 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6504                              void *data)
6505 {
6506         struct nfs_openres *res = data;
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (status)
6512                 goto out;
6513         status = decode_sequence(xdr, &res->seq_res, rqstp);
6514         if (status)
6515                 goto out;
6516         status = decode_putfh(xdr);
6517         if (status)
6518                 goto out;
6519         status = decode_open(xdr, res);
6520         if (status)
6521                 goto out;
6522         status = decode_getfh(xdr, &res->fh);
6523         if (status)
6524                 goto out;
6525         if (res->access_request)
6526                 decode_access(xdr, &res->access_supported, &res->access_result);
6527         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6528         if (res->lg_res)
6529                 decode_layoutget(xdr, rqstp, res->lg_res);
6530 out:
6531         return status;
6532 }
6533
6534 /*
6535  * Decode OPEN_CONFIRM response
6536  */
6537 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6538                                      struct xdr_stream *xdr,
6539                                      void *data)
6540 {
6541         struct nfs_open_confirmres *res = data;
6542         struct compound_hdr hdr;
6543         int status;
6544
6545         status = decode_compound_hdr(xdr, &hdr);
6546         if (status)
6547                 goto out;
6548         status = decode_putfh(xdr);
6549         if (status)
6550                 goto out;
6551         status = decode_open_confirm(xdr, res);
6552 out:
6553         return status;
6554 }
6555
6556 /*
6557  * Decode OPEN response
6558  */
6559 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6560                                     struct xdr_stream *xdr,
6561                                     void *data)
6562 {
6563         struct nfs_openres *res = data;
6564         struct compound_hdr hdr;
6565         int status;
6566
6567         status = decode_compound_hdr(xdr, &hdr);
6568         if (status)
6569                 goto out;
6570         status = decode_sequence(xdr, &res->seq_res, rqstp);
6571         if (status)
6572                 goto out;
6573         status = decode_putfh(xdr);
6574         if (status)
6575                 goto out;
6576         status = decode_open(xdr, res);
6577         if (status)
6578                 goto out;
6579         if (res->access_request)
6580                 decode_access(xdr, &res->access_supported, &res->access_result);
6581         decode_getfattr(xdr, res->f_attr, res->server);
6582         if (res->lg_res)
6583                 decode_layoutget(xdr, rqstp, res->lg_res);
6584 out:
6585         return status;
6586 }
6587
6588 /*
6589  * Decode SETATTR response
6590  */
6591 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6592                                 struct xdr_stream *xdr,
6593                                 void *data)
6594 {
6595         struct nfs_setattrres *res = data;
6596         struct compound_hdr hdr;
6597         int status;
6598
6599         status = decode_compound_hdr(xdr, &hdr);
6600         if (status)
6601                 goto out;
6602         status = decode_sequence(xdr, &res->seq_res, rqstp);
6603         if (status)
6604                 goto out;
6605         status = decode_putfh(xdr);
6606         if (status)
6607                 goto out;
6608         status = decode_setattr(xdr);
6609         if (status)
6610                 goto out;
6611         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6612 out:
6613         return status;
6614 }
6615
6616 /*
6617  * Decode LOCK response
6618  */
6619 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620                              void *data)
6621 {
6622         struct nfs_lock_res *res = data;
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         status = decode_lock(xdr, res);
6636 out:
6637         return status;
6638 }
6639
6640 /*
6641  * Decode LOCKT response
6642  */
6643 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6644                               void *data)
6645 {
6646         struct nfs_lockt_res *res = data;
6647         struct compound_hdr hdr;
6648         int status;
6649
6650         status = decode_compound_hdr(xdr, &hdr);
6651         if (status)
6652                 goto out;
6653         status = decode_sequence(xdr, &res->seq_res, rqstp);
6654         if (status)
6655                 goto out;
6656         status = decode_putfh(xdr);
6657         if (status)
6658                 goto out;
6659         status = decode_lockt(xdr, res);
6660 out:
6661         return status;
6662 }
6663
6664 /*
6665  * Decode LOCKU response
6666  */
6667 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6668                               void *data)
6669 {
6670         struct nfs_locku_res *res = data;
6671         struct compound_hdr hdr;
6672         int status;
6673
6674         status = decode_compound_hdr(xdr, &hdr);
6675         if (status)
6676                 goto out;
6677         status = decode_sequence(xdr, &res->seq_res, rqstp);
6678         if (status)
6679                 goto out;
6680         status = decode_putfh(xdr);
6681         if (status)
6682                 goto out;
6683         status = decode_locku(xdr, res);
6684 out:
6685         return status;
6686 }
6687
6688 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6689                                           struct xdr_stream *xdr, void *dummy)
6690 {
6691         struct compound_hdr hdr;
6692         int status;
6693
6694         status = decode_compound_hdr(xdr, &hdr);
6695         if (!status)
6696                 status = decode_release_lockowner(xdr);
6697         return status;
6698 }
6699
6700 /*
6701  * Decode READLINK response
6702  */
6703 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6704                                  struct xdr_stream *xdr,
6705                                  void *data)
6706 {
6707         struct nfs4_readlink_res *res = data;
6708         struct compound_hdr hdr;
6709         int status;
6710
6711         status = decode_compound_hdr(xdr, &hdr);
6712         if (status)
6713                 goto out;
6714         status = decode_sequence(xdr, &res->seq_res, rqstp);
6715         if (status)
6716                 goto out;
6717         status = decode_putfh(xdr);
6718         if (status)
6719                 goto out;
6720         status = decode_readlink(xdr, rqstp);
6721 out:
6722         return status;
6723 }
6724
6725 /*
6726  * Decode READDIR response
6727  */
6728 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6729                                 void *data)
6730 {
6731         struct nfs4_readdir_res *res = data;
6732         struct compound_hdr hdr;
6733         int status;
6734
6735         status = decode_compound_hdr(xdr, &hdr);
6736         if (status)
6737                 goto out;
6738         status = decode_sequence(xdr, &res->seq_res, rqstp);
6739         if (status)
6740                 goto out;
6741         status = decode_putfh(xdr);
6742         if (status)
6743                 goto out;
6744         status = decode_readdir(xdr, rqstp, res);
6745 out:
6746         return status;
6747 }
6748
6749 /*
6750  * Decode Read response
6751  */
6752 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6753                              void *data)
6754 {
6755         struct nfs_pgio_res *res = data;
6756         struct compound_hdr hdr;
6757         int status;
6758
6759         status = decode_compound_hdr(xdr, &hdr);
6760         res->op_status = hdr.status;
6761         if (status)
6762                 goto out;
6763         status = decode_sequence(xdr, &res->seq_res, rqstp);
6764         if (status)
6765                 goto out;
6766         status = decode_putfh(xdr);
6767         if (status)
6768                 goto out;
6769         status = decode_read(xdr, rqstp, res);
6770         if (!status)
6771                 status = res->count;
6772 out:
6773         return status;
6774 }
6775
6776 /*
6777  * Decode WRITE response
6778  */
6779 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6780                               void *data)
6781 {
6782         struct nfs_pgio_res *res = data;
6783         struct compound_hdr hdr;
6784         int status;
6785
6786         status = decode_compound_hdr(xdr, &hdr);
6787         res->op_status = hdr.status;
6788         if (status)
6789                 goto out;
6790         status = decode_sequence(xdr, &res->seq_res, rqstp);
6791         if (status)
6792                 goto out;
6793         status = decode_putfh(xdr);
6794         if (status)
6795                 goto out;
6796         status = decode_write(xdr, res);
6797         if (status)
6798                 goto out;
6799         if (res->fattr)
6800                 decode_getfattr(xdr, res->fattr, res->server);
6801         if (!status)
6802                 status = res->count;
6803 out:
6804         return status;
6805 }
6806
6807 /*
6808  * Decode COMMIT response
6809  */
6810 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6811                                void *data)
6812 {
6813         struct nfs_commitres *res = data;
6814         struct compound_hdr hdr;
6815         int status;
6816
6817         status = decode_compound_hdr(xdr, &hdr);
6818         res->op_status = hdr.status;
6819         if (status)
6820                 goto out;
6821         status = decode_sequence(xdr, &res->seq_res, rqstp);
6822         if (status)
6823                 goto out;
6824         status = decode_putfh(xdr);
6825         if (status)
6826                 goto out;
6827         status = decode_commit(xdr, res);
6828 out:
6829         return status;
6830 }
6831
6832 /*
6833  * Decode FSINFO response
6834  */
6835 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6836                                void *data)
6837 {
6838         struct nfs4_fsinfo_res *res = data;
6839         struct compound_hdr hdr;
6840         int status;
6841
6842         status = decode_compound_hdr(xdr, &hdr);
6843         if (!status)
6844                 status = decode_sequence(xdr, &res->seq_res, req);
6845         if (!status)
6846                 status = decode_putfh(xdr);
6847         if (!status)
6848                 status = decode_fsinfo(xdr, res->fsinfo);
6849         return status;
6850 }
6851
6852 /*
6853  * Decode PATHCONF response
6854  */
6855 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6856                                  void *data)
6857 {
6858         struct nfs4_pathconf_res *res = data;
6859         struct compound_hdr hdr;
6860         int status;
6861
6862         status = decode_compound_hdr(xdr, &hdr);
6863         if (!status)
6864                 status = decode_sequence(xdr, &res->seq_res, req);
6865         if (!status)
6866                 status = decode_putfh(xdr);
6867         if (!status)
6868                 status = decode_pathconf(xdr, res->pathconf);
6869         return status;
6870 }
6871
6872 /*
6873  * Decode STATFS response
6874  */
6875 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6876                                void *data)
6877 {
6878         struct nfs4_statfs_res *res = data;
6879         struct compound_hdr hdr;
6880         int status;
6881
6882         status = decode_compound_hdr(xdr, &hdr);
6883         if (!status)
6884                 status = decode_sequence(xdr, &res->seq_res, req);
6885         if (!status)
6886                 status = decode_putfh(xdr);
6887         if (!status)
6888                 status = decode_statfs(xdr, res->fsstat);
6889         return status;
6890 }
6891
6892 /*
6893  * Decode GETATTR_BITMAP response
6894  */
6895 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6896                                     struct xdr_stream *xdr,
6897                                     void *data)
6898 {
6899         struct nfs4_server_caps_res *res = data;
6900         struct compound_hdr hdr;
6901         int status;
6902
6903         status = decode_compound_hdr(xdr, &hdr);
6904         if (status)
6905                 goto out;
6906         status = decode_sequence(xdr, &res->seq_res, req);
6907         if (status)
6908                 goto out;
6909         status = decode_putfh(xdr);
6910         if (status)
6911                 goto out;
6912         status = decode_server_caps(xdr, res);
6913 out:
6914         return status;
6915 }
6916
6917 /*
6918  * Decode RENEW response
6919  */
6920 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6921                               void *__unused)
6922 {
6923         struct compound_hdr hdr;
6924         int status;
6925
6926         status = decode_compound_hdr(xdr, &hdr);
6927         if (!status)
6928                 status = decode_renew(xdr);
6929         return status;
6930 }
6931
6932 /*
6933  * Decode SETCLIENTID response
6934  */
6935 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6936                                     struct xdr_stream *xdr,
6937                                     void *data)
6938 {
6939         struct nfs4_setclientid_res *res = data;
6940         struct compound_hdr hdr;
6941         int status;
6942
6943         status = decode_compound_hdr(xdr, &hdr);
6944         if (!status)
6945                 status = decode_setclientid(xdr, res);
6946         return status;
6947 }
6948
6949 /*
6950  * Decode SETCLIENTID_CONFIRM response
6951  */
6952 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6953                                             struct xdr_stream *xdr,
6954                                             void *data)
6955 {
6956         struct compound_hdr hdr;
6957         int status;
6958
6959         status = decode_compound_hdr(xdr, &hdr);
6960         if (!status)
6961                 status = decode_setclientid_confirm(xdr);
6962         return status;
6963 }
6964
6965 /*
6966  * Decode DELEGRETURN response
6967  */
6968 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6969                                     struct xdr_stream *xdr,
6970                                     void *data)
6971 {
6972         struct nfs4_delegreturnres *res = data;
6973         struct compound_hdr hdr;
6974         int status;
6975
6976         status = decode_compound_hdr(xdr, &hdr);
6977         if (status)
6978                 goto out;
6979         status = decode_sequence(xdr, &res->seq_res, rqstp);
6980         if (status)
6981                 goto out;
6982         status = decode_putfh(xdr);
6983         if (status != 0)
6984                 goto out;
6985         if (res->lr_res) {
6986                 status = decode_layoutreturn(xdr, res->lr_res);
6987                 res->lr_ret = status;
6988                 if (status)
6989                         goto out;
6990         }
6991         if (res->fattr) {
6992                 status = decode_getfattr(xdr, res->fattr, res->server);
6993                 if (status != 0)
6994                         goto out;
6995         }
6996         status = decode_delegreturn(xdr);
6997 out:
6998         return status;
6999 }
7000
7001 /*
7002  * Decode FS_LOCATIONS response
7003  */
7004 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7005                                      struct xdr_stream *xdr,
7006                                      void *data)
7007 {
7008         struct nfs4_fs_locations_res *res = data;
7009         struct compound_hdr hdr;
7010         int status;
7011
7012         status = decode_compound_hdr(xdr, &hdr);
7013         if (status)
7014                 goto out;
7015         status = decode_sequence(xdr, &res->seq_res, req);
7016         if (status)
7017                 goto out;
7018         status = decode_putfh(xdr);
7019         if (status)
7020                 goto out;
7021         if (res->migration) {
7022                 xdr_enter_page(xdr, PAGE_SIZE);
7023                 status = decode_getfattr_generic(xdr,
7024                                         &res->fs_locations->fattr,
7025                                          NULL, res->fs_locations,
7026                                          NULL, res->fs_locations->server);
7027                 if (status)
7028                         goto out;
7029                 if (res->renew)
7030                         status = decode_renew(xdr);
7031         } else {
7032                 status = decode_lookup(xdr);
7033                 if (status)
7034                         goto out;
7035                 xdr_enter_page(xdr, PAGE_SIZE);
7036                 status = decode_getfattr_generic(xdr,
7037                                         &res->fs_locations->fattr,
7038                                          NULL, res->fs_locations,
7039                                          NULL, res->fs_locations->server);
7040         }
7041 out:
7042         return status;
7043 }
7044
7045 /*
7046  * Decode SECINFO response
7047  */
7048 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7049                                 struct xdr_stream *xdr,
7050                                 void *data)
7051 {
7052         struct nfs4_secinfo_res *res = data;
7053         struct compound_hdr hdr;
7054         int status;
7055
7056         status = decode_compound_hdr(xdr, &hdr);
7057         if (status)
7058                 goto out;
7059         status = decode_sequence(xdr, &res->seq_res, rqstp);
7060         if (status)
7061                 goto out;
7062         status = decode_putfh(xdr);
7063         if (status)
7064                 goto out;
7065         status = decode_secinfo(xdr, res);
7066 out:
7067         return status;
7068 }
7069
7070 /*
7071  * Decode FSID_PRESENT response
7072  */
7073 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7074                                      struct xdr_stream *xdr,
7075                                      void *data)
7076 {
7077         struct nfs4_fsid_present_res *res = data;
7078         struct compound_hdr hdr;
7079         int status;
7080
7081         status = decode_compound_hdr(xdr, &hdr);
7082         if (status)
7083                 goto out;
7084         status = decode_sequence(xdr, &res->seq_res, rqstp);
7085         if (status)
7086                 goto out;
7087         status = decode_putfh(xdr);
7088         if (status)
7089                 goto out;
7090         status = decode_getfh(xdr, res->fh);
7091         if (status)
7092                 goto out;
7093         if (res->renew)
7094                 status = decode_renew(xdr);
7095 out:
7096         return status;
7097 }
7098
7099 #if defined(CONFIG_NFS_V4_1)
7100 /*
7101  * Decode BIND_CONN_TO_SESSION response
7102  */
7103 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7104                                         struct xdr_stream *xdr,
7105                                         void *res)
7106 {
7107         struct compound_hdr hdr;
7108         int status;
7109
7110         status = decode_compound_hdr(xdr, &hdr);
7111         if (!status)
7112                 status = decode_bind_conn_to_session(xdr, res);
7113         return status;
7114 }
7115
7116 /*
7117  * Decode EXCHANGE_ID response
7118  */
7119 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7120                                     struct xdr_stream *xdr,
7121                                     void *res)
7122 {
7123         struct compound_hdr hdr;
7124         int status;
7125
7126         status = decode_compound_hdr(xdr, &hdr);
7127         if (!status)
7128                 status = decode_exchange_id(xdr, res);
7129         return status;
7130 }
7131
7132 /*
7133  * Decode CREATE_SESSION response
7134  */
7135 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7136                                        struct xdr_stream *xdr,
7137                                        void *res)
7138 {
7139         struct compound_hdr hdr;
7140         int status;
7141
7142         status = decode_compound_hdr(xdr, &hdr);
7143         if (!status)
7144                 status = decode_create_session(xdr, res);
7145         return status;
7146 }
7147
7148 /*
7149  * Decode DESTROY_SESSION response
7150  */
7151 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7152                                         struct xdr_stream *xdr,
7153                                         void *res)
7154 {
7155         struct compound_hdr hdr;
7156         int status;
7157
7158         status = decode_compound_hdr(xdr, &hdr);
7159         if (!status)
7160                 status = decode_destroy_session(xdr, res);
7161         return status;
7162 }
7163
7164 /*
7165  * Decode DESTROY_CLIENTID response
7166  */
7167 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7168                                         struct xdr_stream *xdr,
7169                                         void *res)
7170 {
7171         struct compound_hdr hdr;
7172         int status;
7173
7174         status = decode_compound_hdr(xdr, &hdr);
7175         if (!status)
7176                 status = decode_destroy_clientid(xdr, res);
7177         return status;
7178 }
7179
7180 /*
7181  * Decode SEQUENCE response
7182  */
7183 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7184                                  struct xdr_stream *xdr,
7185                                  void *res)
7186 {
7187         struct compound_hdr hdr;
7188         int status;
7189
7190         status = decode_compound_hdr(xdr, &hdr);
7191         if (!status)
7192                 status = decode_sequence(xdr, res, rqstp);
7193         return status;
7194 }
7195
7196 #endif
7197
7198 /*
7199  * Decode GET_LEASE_TIME response
7200  */
7201 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7202                                        struct xdr_stream *xdr,
7203                                        void *data)
7204 {
7205         struct nfs4_get_lease_time_res *res = data;
7206         struct compound_hdr hdr;
7207         int status;
7208
7209         status = decode_compound_hdr(xdr, &hdr);
7210         if (!status)
7211                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7212         if (!status)
7213                 status = decode_putrootfh(xdr);
7214         if (!status)
7215                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7216         return status;
7217 }
7218
7219 #ifdef CONFIG_NFS_V4_1
7220
7221 /*
7222  * Decode RECLAIM_COMPLETE response
7223  */
7224 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7225                                          struct xdr_stream *xdr,
7226                                          void *data)
7227 {
7228         struct nfs41_reclaim_complete_res *res = data;
7229         struct compound_hdr hdr;
7230         int status;
7231
7232         status = decode_compound_hdr(xdr, &hdr);
7233         if (!status)
7234                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7235         if (!status)
7236                 status = decode_reclaim_complete(xdr, NULL);
7237         return status;
7238 }
7239
7240 /*
7241  * Decode GETDEVINFO response
7242  */
7243 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7244                                       struct xdr_stream *xdr,
7245                                       void *data)
7246 {
7247         struct nfs4_getdeviceinfo_res *res = data;
7248         struct compound_hdr hdr;
7249         int status;
7250
7251         status = decode_compound_hdr(xdr, &hdr);
7252         if (status != 0)
7253                 goto out;
7254         status = decode_sequence(xdr, &res->seq_res, rqstp);
7255         if (status != 0)
7256                 goto out;
7257         status = decode_getdeviceinfo(xdr, res);
7258 out:
7259         return status;
7260 }
7261
7262 /*
7263  * Decode LAYOUTGET response
7264  */
7265 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7266                                   struct xdr_stream *xdr,
7267                                   void *data)
7268 {
7269         struct nfs4_layoutget_res *res = data;
7270         struct compound_hdr hdr;
7271         int status;
7272
7273         status = decode_compound_hdr(xdr, &hdr);
7274         if (status)
7275                 goto out;
7276         status = decode_sequence(xdr, &res->seq_res, rqstp);
7277         if (status)
7278                 goto out;
7279         status = decode_putfh(xdr);
7280         if (status)
7281                 goto out;
7282         status = decode_layoutget(xdr, rqstp, res);
7283 out:
7284         return status;
7285 }
7286
7287 /*
7288  * Decode LAYOUTRETURN response
7289  */
7290 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7291                                      struct xdr_stream *xdr,
7292                                      void *data)
7293 {
7294         struct nfs4_layoutreturn_res *res = data;
7295         struct compound_hdr hdr;
7296         int status;
7297
7298         status = decode_compound_hdr(xdr, &hdr);
7299         if (status)
7300                 goto out;
7301         status = decode_sequence(xdr, &res->seq_res, rqstp);
7302         if (status)
7303                 goto out;
7304         status = decode_putfh(xdr);
7305         if (status)
7306                 goto out;
7307         status = decode_layoutreturn(xdr, res);
7308 out:
7309         return status;
7310 }
7311
7312 /*
7313  * Decode LAYOUTCOMMIT response
7314  */
7315 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7316                                      struct xdr_stream *xdr,
7317                                      void *data)
7318 {
7319         struct nfs4_layoutcommit_res *res = data;
7320         struct compound_hdr hdr;
7321         int status;
7322
7323         status = decode_compound_hdr(xdr, &hdr);
7324         if (status)
7325                 goto out;
7326         status = decode_sequence(xdr, &res->seq_res, rqstp);
7327         if (status)
7328                 goto out;
7329         status = decode_putfh(xdr);
7330         if (status)
7331                 goto out;
7332         status = decode_layoutcommit(xdr, rqstp, res);
7333         if (status)
7334                 goto out;
7335         decode_getfattr(xdr, res->fattr, res->server);
7336 out:
7337         return status;
7338 }
7339
7340 /*
7341  * Decode SECINFO_NO_NAME response
7342  */
7343 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7344                                         struct xdr_stream *xdr,
7345                                         void *data)
7346 {
7347         struct nfs4_secinfo_res *res = data;
7348         struct compound_hdr hdr;
7349         int status;
7350
7351         status = decode_compound_hdr(xdr, &hdr);
7352         if (status)
7353                 goto out;
7354         status = decode_sequence(xdr, &res->seq_res, rqstp);
7355         if (status)
7356                 goto out;
7357         status = decode_putrootfh(xdr);
7358         if (status)
7359                 goto out;
7360         status = decode_secinfo_no_name(xdr, res);
7361 out:
7362         return status;
7363 }
7364
7365 /*
7366  * Decode TEST_STATEID response
7367  */
7368 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7369                                      struct xdr_stream *xdr,
7370                                      void *data)
7371 {
7372         struct nfs41_test_stateid_res *res = data;
7373         struct compound_hdr hdr;
7374         int status;
7375
7376         status = decode_compound_hdr(xdr, &hdr);
7377         if (status)
7378                 goto out;
7379         status = decode_sequence(xdr, &res->seq_res, rqstp);
7380         if (status)
7381                 goto out;
7382         status = decode_test_stateid(xdr, res);
7383 out:
7384         return status;
7385 }
7386
7387 /*
7388  * Decode FREE_STATEID response
7389  */
7390 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7391                                      struct xdr_stream *xdr,
7392                                      void *data)
7393 {
7394         struct nfs41_free_stateid_res *res = data;
7395         struct compound_hdr hdr;
7396         int status;
7397
7398         status = decode_compound_hdr(xdr, &hdr);
7399         if (status)
7400                 goto out;
7401         status = decode_sequence(xdr, &res->seq_res, rqstp);
7402         if (status)
7403                 goto out;
7404         status = decode_free_stateid(xdr, res);
7405 out:
7406         return status;
7407 }
7408 #endif /* CONFIG_NFS_V4_1 */
7409
7410 /**
7411  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7412  *                      the local page cache.
7413  * @xdr: XDR stream where entry resides
7414  * @entry: buffer to fill in with entry data
7415  * @plus: boolean indicating whether this should be a readdirplus entry
7416  *
7417  * Returns zero if successful, otherwise a negative errno value is
7418  * returned.
7419  *
7420  * This function is not invoked during READDIR reply decoding, but
7421  * rather whenever an application invokes the getdents(2) system call
7422  * on a directory already in our cache.
7423  */
7424 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7425                        bool plus)
7426 {
7427         unsigned int savep;
7428         uint32_t bitmap[3] = {0};
7429         uint32_t len;
7430         uint64_t new_cookie;
7431         __be32 *p = xdr_inline_decode(xdr, 4);
7432         if (unlikely(!p))
7433                 return -EAGAIN;
7434         if (*p == xdr_zero) {
7435                 p = xdr_inline_decode(xdr, 4);
7436                 if (unlikely(!p))
7437                         return -EAGAIN;
7438                 if (*p == xdr_zero)
7439                         return -EAGAIN;
7440                 entry->eof = 1;
7441                 return -EBADCOOKIE;
7442         }
7443
7444         p = xdr_inline_decode(xdr, 12);
7445         if (unlikely(!p))
7446                 return -EAGAIN;
7447         p = xdr_decode_hyper(p, &new_cookie);
7448         entry->len = be32_to_cpup(p);
7449
7450         p = xdr_inline_decode(xdr, entry->len);
7451         if (unlikely(!p))
7452                 return -EAGAIN;
7453         entry->name = (const char *) p;
7454
7455         /*
7456          * In case the server doesn't return an inode number,
7457          * we fake one here.  (We don't use inode number 0,
7458          * since glibc seems to choke on it...)
7459          */
7460         entry->ino = 1;
7461         entry->fattr->valid = 0;
7462
7463         if (decode_attr_bitmap(xdr, bitmap) < 0)
7464                 return -EAGAIN;
7465
7466         if (decode_attr_length(xdr, &len, &savep) < 0)
7467                 return -EAGAIN;
7468
7469         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7470                         NULL, entry->fattr->label, entry->server) < 0)
7471                 return -EAGAIN;
7472         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7473                 entry->ino = entry->fattr->mounted_on_fileid;
7474         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7475                 entry->ino = entry->fattr->fileid;
7476
7477         entry->d_type = DT_UNKNOWN;
7478         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7479                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7480
7481         entry->prev_cookie = entry->cookie;
7482         entry->cookie = new_cookie;
7483
7484         return 0;
7485 }
7486
7487 /*
7488  * We need to translate between nfs status return values and
7489  * the local errno values which may not be the same.
7490  */
7491 static struct {
7492         int stat;
7493         int errno;
7494 } nfs_errtbl[] = {
7495         { NFS4_OK,              0               },
7496         { NFS4ERR_PERM,         -EPERM          },
7497         { NFS4ERR_NOENT,        -ENOENT         },
7498         { NFS4ERR_IO,           -errno_NFSERR_IO},
7499         { NFS4ERR_NXIO,         -ENXIO          },
7500         { NFS4ERR_ACCESS,       -EACCES         },
7501         { NFS4ERR_EXIST,        -EEXIST         },
7502         { NFS4ERR_XDEV,         -EXDEV          },
7503         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7504         { NFS4ERR_ISDIR,        -EISDIR         },
7505         { NFS4ERR_INVAL,        -EINVAL         },
7506         { NFS4ERR_FBIG,         -EFBIG          },
7507         { NFS4ERR_NOSPC,        -ENOSPC         },
7508         { NFS4ERR_ROFS,         -EROFS          },
7509         { NFS4ERR_MLINK,        -EMLINK         },
7510         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7511         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7512         { NFS4ERR_DQUOT,        -EDQUOT         },
7513         { NFS4ERR_STALE,        -ESTALE         },
7514         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7515         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7516         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7517         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7518         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7519         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7520         { NFS4ERR_LOCKED,       -EAGAIN         },
7521         { NFS4ERR_SYMLINK,      -ELOOP          },
7522         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7523         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7524         { NFS4ERR_NOXATTR,      -ENODATA        },
7525         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7526         { -1,                   -EIO            }
7527 };
7528
7529 /*
7530  * Convert an NFS error code to a local one.
7531  * This one is used jointly by NFSv2 and NFSv3.
7532  */
7533 static int
7534 nfs4_stat_to_errno(int stat)
7535 {
7536         int i;
7537         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7538                 if (nfs_errtbl[i].stat == stat)
7539                         return nfs_errtbl[i].errno;
7540         }
7541         if (stat <= 10000 || stat > 10100) {
7542                 /* The server is looney tunes. */
7543                 return -EREMOTEIO;
7544         }
7545         /* If we cannot translate the error, the recovery routines should
7546          * handle it.
7547          * Note: remaining NFSv4 error codes have values > 10000, so should
7548          * not conflict with native Linux error codes.
7549          */
7550         return -stat;
7551 }
7552
7553 #ifdef CONFIG_NFS_V4_2
7554 #include "nfs42xdr.c"
7555 #endif /* CONFIG_NFS_V4_2 */
7556
7557 #define PROC(proc, argtype, restype)                            \
7558 [NFSPROC4_CLNT_##proc] = {                                      \
7559         .p_proc   = NFSPROC4_COMPOUND,                          \
7560         .p_encode = nfs4_xdr_##argtype,                         \
7561         .p_decode = nfs4_xdr_##restype,                         \
7562         .p_arglen = NFS4_##argtype##_sz,                        \
7563         .p_replen = NFS4_##restype##_sz,                        \
7564         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7565         .p_name   = #proc,                                      \
7566 }
7567
7568 #define STUB(proc)              \
7569 [NFSPROC4_CLNT_##proc] = {      \
7570         .p_name = #proc,        \
7571 }
7572
7573 #if defined(CONFIG_NFS_V4_1)
7574 #define PROC41(proc, argtype, restype)                          \
7575         PROC(proc, argtype, restype)
7576 #else
7577 #define PROC41(proc, argtype, restype)                          \
7578         STUB(proc)
7579 #endif
7580
7581 #if defined(CONFIG_NFS_V4_2)
7582 #define PROC42(proc, argtype, restype)                          \
7583         PROC(proc, argtype, restype)
7584 #else
7585 #define PROC42(proc, argtype, restype)                          \
7586         STUB(proc)
7587 #endif
7588
7589 const struct rpc_procinfo nfs4_procedures[] = {
7590         PROC(READ,              enc_read,               dec_read),
7591         PROC(WRITE,             enc_write,              dec_write),
7592         PROC(COMMIT,            enc_commit,             dec_commit),
7593         PROC(OPEN,              enc_open,               dec_open),
7594         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7595         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7596         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7597         PROC(CLOSE,             enc_close,              dec_close),
7598         PROC(SETATTR,           enc_setattr,            dec_setattr),
7599         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7600         PROC(RENEW,             enc_renew,              dec_renew),
7601         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7602         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7603         PROC(LOCK,              enc_lock,               dec_lock),
7604         PROC(LOCKT,             enc_lockt,              dec_lockt),
7605         PROC(LOCKU,             enc_locku,              dec_locku),
7606         PROC(ACCESS,            enc_access,             dec_access),
7607         PROC(GETATTR,           enc_getattr,            dec_getattr),
7608         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7609         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7610         PROC(REMOVE,            enc_remove,             dec_remove),
7611         PROC(RENAME,            enc_rename,             dec_rename),
7612         PROC(LINK,              enc_link,               dec_link),
7613         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7614         PROC(CREATE,            enc_create,             dec_create),
7615         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7616         PROC(STATFS,            enc_statfs,             dec_statfs),
7617         PROC(READLINK,          enc_readlink,           dec_readlink),
7618         PROC(READDIR,           enc_readdir,            dec_readdir),
7619         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7620         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7621         PROC(GETACL,            enc_getacl,             dec_getacl),
7622         PROC(SETACL,            enc_setacl,             dec_setacl),
7623         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7624         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7625         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7626         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7627         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7628         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7629         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7630         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7631         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7632         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7633         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7634         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7635         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7636         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7637         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7638         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7639         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7640         STUB(GETDEVICELIST),
7641         PROC41(BIND_CONN_TO_SESSION,
7642                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7643         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7644         PROC42(SEEK,            enc_seek,               dec_seek),
7645         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7646         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7647         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7648         PROC42(CLONE,           enc_clone,              dec_clone),
7649         PROC42(COPY,            enc_copy,               dec_copy),
7650         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7651         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7652         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7653         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7654         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7655         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7656         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7657         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7658         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7659 };
7660
7661 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7662 const struct rpc_version nfs_version4 = {
7663         .number                 = 4,
7664         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7665         .procs                  = nfs4_procedures,
7666         .counts                 = nfs_version4_counts,
7667 };