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 open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  88 #define lock_owner_id_maxsz     (1 + 1 + 4)
  89 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  90 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  91 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define op_encode_hdr_maxsz     (1)
  93 #define op_decode_hdr_maxsz     (2)
  94 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  95 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  97 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  99                                 (NFS4_FHSIZE >> 2))
 100 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 101 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 102 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 103 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 104 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 105                                 ((3+NFS4_FHSIZE) >> 2))
 106 #define nfs4_fattr_bitmap_maxsz 4
 107 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 108 #define nfstime4_maxsz          (3)
 109 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 110 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 111 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 112 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 114 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 115 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 116 #else
 117 #define nfs4_label_maxsz        0
 118 #endif
 119 /* We support only one layout type per file system */
 120 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 121 /* This is based on getfattr, which uses the most attributes: */
 122 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 123                                 3*nfstime4_maxsz + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 126                                  decode_mdsthreshold_maxsz))
 127 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 128                                 nfs4_fattr_value_maxsz)
 129 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 130 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 131                                  1 + 2 + 1 + \
 132                                 nfs4_owner_maxsz + \
 133                                 nfs4_group_maxsz + \
 134                                 nfs4_label_maxsz + \
 135                                 1 + nfstime4_maxsz + \
 136                                 1 + nfstime4_maxsz)
 137 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 138 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 139 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 140 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 141 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 142 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 143  * layout types will be returned.
 144  */
 145 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 146                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 147 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 148 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 149 #define encode_setclientid_maxsz \
 150                                 (op_encode_hdr_maxsz + \
 151                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                 /* client name */ \
 153                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 154                                 1 /* sc_prog */ + \
 155                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 157                                 1) /* sc_cb_ident */
 158 #define decode_setclientid_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                 2 /* clientid */ + \
 161                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 162                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 163                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 164 #define encode_setclientid_confirm_maxsz \
 165                                 (op_encode_hdr_maxsz + \
 166                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 167 #define decode_setclientid_confirm_maxsz \
 168                                 (op_decode_hdr_maxsz)
 169 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 170 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 171 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 172 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 173 #define encode_share_access_maxsz \
 174                                 (2)
 175 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 176 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 177 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 178 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 179                                 2 + encode_share_access_maxsz + 2 + \
 180                                 open_owner_id_maxsz + \
 181                                 encode_opentype_maxsz + \
 182                                 encode_claim_null_maxsz)
 183 #define decode_space_limit_maxsz        (3)
 184 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 185 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 186                                 decode_space_limit_maxsz + \
 187                                 decode_ace_maxsz)
 188 #define decode_change_info_maxsz        (5)
 189 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 190                                 decode_stateid_maxsz + \
 191                                 decode_change_info_maxsz + 1 + \
 192                                 nfs4_fattr_bitmap_maxsz + \
 193                                 decode_delegation_maxsz)
 194 #define encode_open_confirm_maxsz \
 195                                 (op_encode_hdr_maxsz + \
 196                                  encode_stateid_maxsz + 1)
 197 #define decode_open_confirm_maxsz \
 198                                 (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_open_downgrade_maxsz \
 201                                 (op_encode_hdr_maxsz + \
 202                                  encode_stateid_maxsz + 1 + \
 203                                  encode_share_access_maxsz)
 204 #define decode_open_downgrade_maxsz \
 205                                 (op_decode_hdr_maxsz + \
 206                                  decode_stateid_maxsz)
 207 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 208                                  1 + encode_stateid_maxsz)
 209 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_stateid_maxsz)
 211 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 212                                  encode_stateid_maxsz + \
 213                                  encode_attrs_maxsz)
 214 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 215                                  nfs4_fattr_bitmap_maxsz)
 216 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 217                                  encode_stateid_maxsz + 3)
 218 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 219 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 220                                  2 + encode_verifier_maxsz + 5 + \
 221                                 nfs4_label_maxsz)
 222 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 223                                  decode_verifier_maxsz)
 224 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 226 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 227                                  encode_stateid_maxsz + 4)
 228 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 229                                  2 + decode_verifier_maxsz)
 230 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 231 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 232                                  decode_verifier_maxsz)
 233 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 234                                 nfs4_name_maxsz)
 235 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 236                                  decode_change_info_maxsz)
 237 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 238                                 2 * nfs4_name_maxsz)
 239 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 240                                  decode_change_info_maxsz + \
 241                                  decode_change_info_maxsz)
 242 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 243                                 nfs4_name_maxsz)
 244 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 245 #define encode_lockowner_maxsz  (7)
 246 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 247                                  7 + \
 248                                  1 + encode_stateid_maxsz + 1 + \
 249                                  encode_lockowner_maxsz)
 250 #define decode_lock_denied_maxsz \
 251                                 (8 + decode_lockowner_maxsz)
 252 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 253                                  decode_lock_denied_maxsz)
 254 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 255                                 encode_lockowner_maxsz)
 256 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 257                                  decode_lock_denied_maxsz)
 258 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 259                                  encode_stateid_maxsz + \
 260                                  4)
 261 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 262                                  decode_stateid_maxsz)
 263 #define encode_release_lockowner_maxsz \
 264                                 (op_encode_hdr_maxsz + \
 265                                  encode_lockowner_maxsz)
 266 #define decode_release_lockowner_maxsz \
 267                                 (op_decode_hdr_maxsz)
 268 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 269 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 270 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 271                                 1 + nfs4_name_maxsz + \
 272                                 1 + \
 273                                 nfs4_fattr_maxsz)
 274 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 275 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 276                                 1 + 2 + nfs4_name_maxsz + \
 277                                 encode_attrs_maxsz)
 278 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 279                                 decode_change_info_maxsz + \
 280                                 nfs4_fattr_bitmap_maxsz)
 281 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 282 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 283 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 284 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 285 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 286 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 287                                  nfs4_fattr_bitmap_maxsz + 1)
 288 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 289                                  encode_stateid_maxsz + 3)
 290 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 291 #define encode_fs_locations_maxsz \
 292                                 (encode_getattr_maxsz)
 293 #define decode_fs_locations_maxsz \
 294                                 (0)
 295 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 296 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 297
 298 #if defined(CONFIG_NFS_V4_1)
 299 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 300 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 301                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 302
 303 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 304                                 encode_verifier_maxsz + \
 305                                 1 /* co_ownerid.len */ + \
 306                                 /* eia_clientowner */ \
 307                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 308                                 1 /* flags */ + \
 309                                 1 /* spa_how */ + \
 310                                 /* max is SP4_MACH_CRED (for now) */ + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 /* implementation id array of size 1 */ + \
 314                                 1 /* nii_domain */ + \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 316                                 1 /* nii_name */ + \
 317                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 318                                 3 /* nii_date */)
 319 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 320                                 2 /* eir_clientid */ + \
 321                                 1 /* eir_sequenceid */ + \
 322                                 1 /* eir_flags */ + \
 323                                 1 /* spr_how */ + \
 324                                   /* max is SP4_MACH_CRED (for now) */ + \
 325                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 327                                 2 /* eir_server_owner.so_minor_id */ + \
 328                                 /* eir_server_owner.so_major_id<> */ \
 329                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 330                                 /* eir_server_scope<> */ \
 331                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 332                                 1 /* eir_server_impl_id array length */ + \
 333                                 1 /* nii_domain */ + \
 334                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 335                                 1 /* nii_name */ + \
 336                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 337                                 3 /* nii_date */)
 338 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 339 #define decode_channel_attrs_maxsz  (6 + \
 340                                      1 /* ca_rdma_ird.len */ + \
 341                                      1 /* ca_rdma_ird */)
 342 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 343                                      2 /* csa_clientid */ + \
 344                                      1 /* csa_sequence */ + \
 345                                      1 /* csa_flags */ + \
 346                                      encode_channel_attrs_maxsz + \
 347                                      encode_channel_attrs_maxsz + \
 348                                      1 /* csa_cb_program */ + \
 349                                      1 /* csa_sec_parms.len (1) */ + \
 350                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 351                                      1 /* stamp */ + \
 352                                      1 /* machinename.len */ + \
 353                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 354                                      1 /* uid */ + \
 355                                      1 /* gid */ + \
 356                                      1 /* gids.len (0) */)
 357 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 358                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                      1 /* csr_sequence */ + \
 360                                      1 /* csr_flags */ + \
 361                                      decode_channel_attrs_maxsz + \
 362                                      decode_channel_attrs_maxsz)
 363 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 364                                      /* bctsa_sessid */ \
 365                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 366                                      1 /* bctsa_dir */ + \
 367                                      1 /* bctsa_use_conn_in_rdma_mode */)
 368 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 369                                      /* bctsr_sessid */ \
 370                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 371                                      1 /* bctsr_dir */ + \
 372                                      1 /* bctsr_use_conn_in_rdma_mode */)
 373 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 374 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 375 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 376 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 377 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 378                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 379 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 380                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 381 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 382 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 383 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 384                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 385                                 1 /* layout type */ + \
 386                                 1 /* maxcount */ + \
 387                                 1 /* bitmap size */ + \
 388                                 1 /* notification bitmap length */ + \
 389                                 1 /* notification bitmap, word 0 */)
 390 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 391                                 1 /* layout type */ + \
 392                                 1 /* opaque devaddr4 length */ + \
 393                                   /* devaddr4 payload is read into page */ \
 394                                 1 /* notification bitmap length */ + \
 395                                 1 /* notification bitmap, word 0 */)
 396 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 397                                 encode_stateid_maxsz)
 398 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 399                                 decode_stateid_maxsz + \
 400                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 401 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 402                                 2 /* offset */ + \
 403                                 2 /* length */ + \
 404                                 1 /* reclaim */ + \
 405                                 encode_stateid_maxsz + \
 406                                 1 /* new offset (true) */ + \
 407                                 2 /* last byte written */ + \
 408                                 1 /* nt_timechanged (false) */ + \
 409                                 1 /* layoutupdate4 layout type */ + \
 410                                 1 /* layoutupdate4 opaqueue len */)
 411                                   /* the actual content of layoutupdate4 should
 412                                      be allocated by drivers and spliced in
 413                                      using xdr_write_pages */
 414 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 415 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 416                                 encode_stateid_maxsz + \
 417                                 1 + \
 418                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 419 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 420                                 1 + decode_stateid_maxsz)
 421 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 422 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 423 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 424                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 425 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 426 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 427                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 428 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 429 #else /* CONFIG_NFS_V4_1 */
 430 #define encode_sequence_maxsz   0
 431 #define decode_sequence_maxsz   0
 432 #define encode_layoutreturn_maxsz 0
 433 #define decode_layoutreturn_maxsz 0
 434 #define encode_layoutget_maxsz  0
 435 #define decode_layoutget_maxsz  0
 436 #endif /* CONFIG_NFS_V4_1 */
 437
 438 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 439 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 440 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 441                                 encode_sequence_maxsz + \
 442                                 encode_putfh_maxsz + \
 443                                 encode_read_maxsz)
 444 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 445                                 decode_sequence_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_read_maxsz)
 448 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_readlink_maxsz)
 452 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_readlink_maxsz)
 456 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_readdir_maxsz)
 460 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 461                                 decode_sequence_maxsz + \
 462                                 decode_putfh_maxsz + \
 463                                 decode_readdir_maxsz)
 464 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_write_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 470                                 decode_sequence_maxsz + \
 471                                 decode_putfh_maxsz + \
 472                                 decode_write_maxsz + \
 473                                 decode_getattr_maxsz)
 474 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 475                                 encode_sequence_maxsz + \
 476                                 encode_putfh_maxsz + \
 477                                 encode_commit_maxsz)
 478 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 479                                 decode_sequence_maxsz + \
 480                                 decode_putfh_maxsz + \
 481                                 decode_commit_maxsz)
 482 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_open_maxsz + \
 486                                 encode_access_maxsz + \
 487                                 encode_getfh_maxsz + \
 488                                 encode_getattr_maxsz + \
 489                                 encode_layoutget_maxsz)
 490 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 491                                 decode_sequence_maxsz + \
 492                                 decode_putfh_maxsz + \
 493                                 decode_open_maxsz + \
 494                                 decode_access_maxsz + \
 495                                 decode_getfh_maxsz + \
 496                                 decode_getattr_maxsz + \
 497                                 decode_layoutget_maxsz)
 498 #define NFS4_enc_open_confirm_sz \
 499                                 (compound_encode_hdr_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_open_confirm_maxsz)
 502 #define NFS4_dec_open_confirm_sz \
 503                                 (compound_decode_hdr_maxsz + \
 504                                  decode_putfh_maxsz + \
 505                                  decode_open_confirm_maxsz)
 506 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 507                                         encode_sequence_maxsz + \
 508                                         encode_putfh_maxsz + \
 509                                         encode_open_maxsz + \
 510                                         encode_access_maxsz + \
 511                                         encode_getattr_maxsz + \
 512                                         encode_layoutget_maxsz)
 513 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 514                                         decode_sequence_maxsz + \
 515                                         decode_putfh_maxsz + \
 516                                         decode_open_maxsz + \
 517                                         decode_access_maxsz + \
 518                                         decode_getattr_maxsz + \
 519                                         decode_layoutget_maxsz)
 520 #define NFS4_enc_open_downgrade_sz \
 521                                 (compound_encode_hdr_maxsz + \
 522                                  encode_sequence_maxsz + \
 523                                  encode_putfh_maxsz + \
 524                                  encode_layoutreturn_maxsz + \
 525                                  encode_open_downgrade_maxsz)
 526 #define NFS4_dec_open_downgrade_sz \
 527                                 (compound_decode_hdr_maxsz + \
 528                                  decode_sequence_maxsz + \
 529                                  decode_putfh_maxsz + \
 530                                  decode_layoutreturn_maxsz + \
 531                                  decode_open_downgrade_maxsz)
 532 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 533                                  encode_sequence_maxsz + \
 534                                  encode_putfh_maxsz + \
 535                                  encode_layoutreturn_maxsz + \
 536                                  encode_close_maxsz + \
 537                                  encode_getattr_maxsz)
 538 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 539                                  decode_sequence_maxsz + \
 540                                  decode_putfh_maxsz + \
 541                                  decode_layoutreturn_maxsz + \
 542                                  decode_close_maxsz + \
 543                                  decode_getattr_maxsz)
 544 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 545                                  encode_sequence_maxsz + \
 546                                  encode_putfh_maxsz + \
 547                                  encode_setattr_maxsz + \
 548                                  encode_getattr_maxsz)
 549 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 550                                  decode_sequence_maxsz + \
 551                                  decode_putfh_maxsz + \
 552                                  decode_setattr_maxsz + \
 553                                  decode_getattr_maxsz)
 554 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_fsinfo_maxsz)
 558 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_fsinfo_maxsz)
 562 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 563                                 encode_renew_maxsz)
 564 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 565                                 decode_renew_maxsz)
 566 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 567                                 encode_setclientid_maxsz)
 568 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 569                                 decode_setclientid_maxsz)
 570 #define NFS4_enc_setclientid_confirm_sz \
 571                                 (compound_encode_hdr_maxsz + \
 572                                 encode_setclientid_confirm_maxsz)
 573 #define NFS4_dec_setclientid_confirm_sz \
 574                                 (compound_decode_hdr_maxsz + \
 575                                 decode_setclientid_confirm_maxsz)
 576 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 577                                 encode_sequence_maxsz + \
 578                                 encode_putfh_maxsz + \
 579                                 encode_lock_maxsz)
 580 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_lock_maxsz)
 584 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 585                                 encode_sequence_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_lockt_maxsz)
 588 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 589                                  decode_sequence_maxsz + \
 590                                  decode_putfh_maxsz + \
 591                                  decode_lockt_maxsz)
 592 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 593                                 encode_sequence_maxsz + \
 594                                 encode_putfh_maxsz + \
 595                                 encode_locku_maxsz)
 596 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 597                                 decode_sequence_maxsz + \
 598                                 decode_putfh_maxsz + \
 599                                 decode_locku_maxsz)
 600 #define NFS4_enc_release_lockowner_sz \
 601                                 (compound_encode_hdr_maxsz + \
 602                                  encode_lockowner_maxsz)
 603 #define NFS4_dec_release_lockowner_sz \
 604                                 (compound_decode_hdr_maxsz + \
 605                                  decode_lockowner_maxsz)
 606 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 607                                 encode_sequence_maxsz + \
 608                                 encode_putfh_maxsz + \
 609                                 encode_access_maxsz + \
 610                                 encode_getattr_maxsz)
 611 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_access_maxsz + \
 615                                 decode_getattr_maxsz)
 616 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 617                                 encode_sequence_maxsz + \
 618                                 encode_putfh_maxsz + \
 619                                 encode_getattr_maxsz + \
 620                                 encode_renew_maxsz)
 621 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_getattr_maxsz + \
 625                                 decode_renew_maxsz)
 626 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 627                                 encode_sequence_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_lookup_maxsz + \
 630                                 encode_getattr_maxsz + \
 631                                 encode_getfh_maxsz)
 632 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_lookup_maxsz + \
 636                                 decode_getattr_maxsz + \
 637                                 decode_getfh_maxsz)
 638 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 639                                 encode_sequence_maxsz + \
 640                                 encode_putfh_maxsz + \
 641                                 encode_lookupp_maxsz + \
 642                                 encode_getattr_maxsz + \
 643                                 encode_getfh_maxsz)
 644 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 645                                 decode_sequence_maxsz + \
 646                                 decode_putfh_maxsz + \
 647                                 decode_lookupp_maxsz + \
 648                                 decode_getattr_maxsz + \
 649                                 decode_getfh_maxsz)
 650 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 651                                 encode_sequence_maxsz + \
 652                                 encode_putrootfh_maxsz + \
 653                                 encode_getattr_maxsz + \
 654                                 encode_getfh_maxsz)
 655 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 656                                 decode_sequence_maxsz + \
 657                                 decode_putrootfh_maxsz + \
 658                                 decode_getattr_maxsz + \
 659                                 decode_getfh_maxsz)
 660 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_remove_maxsz)
 664 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_remove_maxsz)
 668 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_savefh_maxsz + \
 672                                 encode_putfh_maxsz + \
 673                                 encode_rename_maxsz)
 674 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 675                                 decode_sequence_maxsz + \
 676                                 decode_putfh_maxsz + \
 677                                 decode_savefh_maxsz + \
 678                                 decode_putfh_maxsz + \
 679                                 decode_rename_maxsz)
 680 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 681                                 encode_sequence_maxsz + \
 682                                 encode_putfh_maxsz + \
 683                                 encode_savefh_maxsz + \
 684                                 encode_putfh_maxsz + \
 685                                 encode_link_maxsz + \
 686                                 encode_restorefh_maxsz + \
 687                                 encode_getattr_maxsz)
 688 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 689                                 decode_sequence_maxsz + \
 690                                 decode_putfh_maxsz + \
 691                                 decode_savefh_maxsz + \
 692                                 decode_putfh_maxsz + \
 693                                 decode_link_maxsz + \
 694                                 decode_restorefh_maxsz + \
 695                                 decode_getattr_maxsz)
 696 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 697                                 encode_sequence_maxsz + \
 698                                 encode_putfh_maxsz + \
 699                                 encode_symlink_maxsz + \
 700                                 encode_getattr_maxsz + \
 701                                 encode_getfh_maxsz)
 702 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 703                                 decode_sequence_maxsz + \
 704                                 decode_putfh_maxsz + \
 705                                 decode_symlink_maxsz + \
 706                                 decode_getattr_maxsz + \
 707                                 decode_getfh_maxsz)
 708 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_create_maxsz + \
 712                                 encode_getfh_maxsz + \
 713                                 encode_getattr_maxsz)
 714 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 715                                 decode_sequence_maxsz + \
 716                                 decode_putfh_maxsz + \
 717                                 decode_create_maxsz + \
 718                                 decode_getfh_maxsz + \
 719                                 decode_getattr_maxsz)
 720 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 721                                 encode_sequence_maxsz + \
 722                                 encode_putfh_maxsz + \
 723                                 encode_getattr_maxsz)
 724 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 725                                 decode_sequence_maxsz + \
 726                                 decode_putfh_maxsz + \
 727                                 decode_getattr_maxsz)
 728 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 729                                 encode_sequence_maxsz + \
 730                                 encode_putfh_maxsz + \
 731                                 encode_statfs_maxsz)
 732 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 733                                 decode_sequence_maxsz + \
 734                                 decode_putfh_maxsz + \
 735                                 decode_statfs_maxsz)
 736 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 737                                 encode_sequence_maxsz + \
 738                                 encode_putfh_maxsz + \
 739                                 encode_getattr_maxsz)
 740 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 741                                 decode_sequence_maxsz + \
 742                                 decode_putfh_maxsz + \
 743                                 decode_getattr_maxsz)
 744 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 745                                 encode_sequence_maxsz + \
 746                                 encode_putfh_maxsz + \
 747                                 encode_layoutreturn_maxsz + \
 748                                 encode_delegreturn_maxsz + \
 749                                 encode_getattr_maxsz)
 750 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 751                                 decode_sequence_maxsz + \
 752                                 decode_putfh_maxsz + \
 753                                 decode_layoutreturn_maxsz + \
 754                                 decode_delegreturn_maxsz + \
 755                                 decode_getattr_maxsz)
 756 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 757                                 encode_sequence_maxsz + \
 758                                 encode_putfh_maxsz + \
 759                                 encode_getacl_maxsz)
 760 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 761                                 decode_sequence_maxsz + \
 762                                 decode_putfh_maxsz + \
 763                                 decode_getacl_maxsz)
 764 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 765                                 encode_sequence_maxsz + \
 766                                 encode_putfh_maxsz + \
 767                                 encode_setacl_maxsz)
 768 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 769                                 decode_sequence_maxsz + \
 770                                 decode_putfh_maxsz + \
 771                                 decode_setacl_maxsz)
 772 #define NFS4_enc_fs_locations_sz \
 773                                 (compound_encode_hdr_maxsz + \
 774                                  encode_sequence_maxsz + \
 775                                  encode_putfh_maxsz + \
 776                                  encode_lookup_maxsz + \
 777                                  encode_fs_locations_maxsz + \
 778                                  encode_renew_maxsz)
 779 #define NFS4_dec_fs_locations_sz \
 780                                 (compound_decode_hdr_maxsz + \
 781                                  decode_sequence_maxsz + \
 782                                  decode_putfh_maxsz + \
 783                                  decode_lookup_maxsz + \
 784                                  decode_fs_locations_maxsz + \
 785                                  decode_renew_maxsz)
 786 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 787                                 encode_sequence_maxsz + \
 788                                 encode_putfh_maxsz + \
 789                                 encode_secinfo_maxsz)
 790 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 791                                 decode_sequence_maxsz + \
 792                                 decode_putfh_maxsz + \
 793                                 decode_secinfo_maxsz)
 794 #define NFS4_enc_fsid_present_sz \
 795                                 (compound_encode_hdr_maxsz + \
 796                                  encode_sequence_maxsz + \
 797                                  encode_putfh_maxsz + \
 798                                  encode_getfh_maxsz + \
 799                                  encode_renew_maxsz)
 800 #define NFS4_dec_fsid_present_sz \
 801                                 (compound_decode_hdr_maxsz + \
 802                                  decode_sequence_maxsz + \
 803                                  decode_putfh_maxsz + \
 804                                  decode_getfh_maxsz + \
 805                                  decode_renew_maxsz)
 806 #if defined(CONFIG_NFS_V4_1)
 807 #define NFS4_enc_bind_conn_to_session_sz \
 808                                 (compound_encode_hdr_maxsz + \
 809                                  encode_bind_conn_to_session_maxsz)
 810 #define NFS4_dec_bind_conn_to_session_sz \
 811                                 (compound_decode_hdr_maxsz + \
 812                                  decode_bind_conn_to_session_maxsz)
 813 #define NFS4_enc_exchange_id_sz \
 814                                 (compound_encode_hdr_maxsz + \
 815                                  encode_exchange_id_maxsz)
 816 #define NFS4_dec_exchange_id_sz \
 817                                 (compound_decode_hdr_maxsz + \
 818                                  decode_exchange_id_maxsz)
 819 #define NFS4_enc_create_session_sz \
 820                                 (compound_encode_hdr_maxsz + \
 821                                  encode_create_session_maxsz)
 822 #define NFS4_dec_create_session_sz \
 823                                 (compound_decode_hdr_maxsz + \
 824                                  decode_create_session_maxsz)
 825 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 826                                          encode_destroy_session_maxsz)
 827 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 828                                          decode_destroy_session_maxsz)
 829 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 830                                          encode_destroy_clientid_maxsz)
 831 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 832                                          decode_destroy_clientid_maxsz)
 833 #define NFS4_enc_sequence_sz \
 834                                 (compound_decode_hdr_maxsz + \
 835                                  encode_sequence_maxsz)
 836 #define NFS4_dec_sequence_sz \
 837                                 (compound_decode_hdr_maxsz + \
 838                                  decode_sequence_maxsz)
 839 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 840                                          encode_sequence_maxsz + \
 841                                          encode_putrootfh_maxsz + \
 842                                          encode_fsinfo_maxsz)
 843 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 844                                          decode_sequence_maxsz + \
 845                                          decode_putrootfh_maxsz + \
 846                                          decode_fsinfo_maxsz)
 847 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 848                                          encode_sequence_maxsz + \
 849                                          encode_reclaim_complete_maxsz)
 850 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 851                                          decode_sequence_maxsz + \
 852                                          decode_reclaim_complete_maxsz)
 853 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 854                                 encode_sequence_maxsz +\
 855                                 encode_getdeviceinfo_maxsz)
 856 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 857                                 decode_sequence_maxsz + \
 858                                 decode_getdeviceinfo_maxsz)
 859 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 860                                 encode_sequence_maxsz + \
 861                                 encode_putfh_maxsz +        \
 862                                 encode_layoutget_maxsz)
 863 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 864                                 decode_sequence_maxsz + \
 865                                 decode_putfh_maxsz +        \
 866                                 decode_layoutget_maxsz)
 867 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 868                                 encode_sequence_maxsz +\
 869                                 encode_putfh_maxsz + \
 870                                 encode_layoutcommit_maxsz + \
 871                                 encode_getattr_maxsz)
 872 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 873                                 decode_sequence_maxsz + \
 874                                 decode_putfh_maxsz + \
 875                                 decode_layoutcommit_maxsz + \
 876                                 decode_getattr_maxsz)
 877 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 878                                 encode_sequence_maxsz + \
 879                                 encode_putfh_maxsz + \
 880                                 encode_layoutreturn_maxsz)
 881 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 882                                 decode_sequence_maxsz + \
 883                                 decode_putfh_maxsz + \
 884                                 decode_layoutreturn_maxsz)
 885 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 886                                         encode_sequence_maxsz + \
 887                                         encode_putrootfh_maxsz +\
 888                                         encode_secinfo_no_name_maxsz)
 889 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 890                                         decode_sequence_maxsz + \
 891                                         decode_putrootfh_maxsz + \
 892                                         decode_secinfo_no_name_maxsz)
 893 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 894                                          encode_sequence_maxsz + \
 895                                          encode_test_stateid_maxsz)
 896 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 897                                          decode_sequence_maxsz + \
 898                                          decode_test_stateid_maxsz)
 899 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 900                                          encode_sequence_maxsz + \
 901                                          encode_free_stateid_maxsz)
 902 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 903                                          decode_sequence_maxsz + \
 904                                          decode_free_stateid_maxsz)
 905
 906 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 907                                       compound_encode_hdr_maxsz +
 908                                       encode_sequence_maxsz +
 909                                       encode_putfh_maxsz +
 910                                       encode_getattr_maxsz) *
 911                                      XDR_UNIT);
 912
 913 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 914                                      compound_decode_hdr_maxsz +
 915                                      decode_sequence_maxsz +
 916                                      decode_putfh_maxsz) *
 917                                     XDR_UNIT);
 918
 919 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 920                                            compound_decode_hdr_maxsz +
 921                                            decode_sequence_maxsz) *
 922                                           XDR_UNIT);
 923 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 924 #endif /* CONFIG_NFS_V4_1 */
 925
 926 static const umode_t nfs_type2fmt[] = {
 927         [NF4BAD] = 0,
 928         [NF4REG] = S_IFREG,
 929         [NF4DIR] = S_IFDIR,
 930         [NF4BLK] = S_IFBLK,
 931         [NF4CHR] = S_IFCHR,
 932         [NF4LNK] = S_IFLNK,
 933         [NF4SOCK] = S_IFSOCK,
 934         [NF4FIFO] = S_IFIFO,
 935         [NF4ATTRDIR] = 0,
 936         [NF4NAMEDATTR] = 0,
 937 };
 938
 939 struct compound_hdr {
 940         int32_t         status;
 941         uint32_t        nops;
 942         __be32 *        nops_p;
 943         uint32_t        taglen;
 944         char *          tag;
 945         uint32_t        replen;         /* expected reply words */
 946         u32             minorversion;
 947 };
 948
 949 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 950 {
 951         __be32 *p = xdr_reserve_space(xdr, nbytes);
 952         BUG_ON(!p);
 953         return p;
 954 }
 955
 956 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 957 {
 958         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 959 }
 960
 961 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 962 {
 963         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 964 }
 965
 966 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 967 {
 968         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 969 }
 970
 971 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 972 {
 973         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 974 }
 975
 976 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 977                 const __u32 *bitmap, size_t len)
 978 {
 979         ssize_t ret;
 980
 981         /* Trim empty words */
 982         while (len > 0 && bitmap[len-1] == 0)
 983                 len--;
 984         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 985         if (WARN_ON_ONCE(ret < 0))
 986                 return ret;
 987         return len;
 988 }
 989
 990 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 991                 __u32 *res, size_t len)
 992 {
 993         size_t i;
 994         __u32 tmp;
 995
 996         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
 997                 len--;
 998         for (i = len; i-- > 0;) {
 999                 tmp = bitmap[i] & mask[i];
1000                 res[i] = tmp;
1001         }
1002         return len;
1003 }
1004
1005 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1006                 const struct nfs_seqid *seqid)
1007 {
1008         if (seqid != NULL)
1009                 encode_uint32(xdr, seqid->sequence->counter);
1010         else
1011                 encode_uint32(xdr, 0);
1012 }
1013
1014 static void encode_compound_hdr(struct xdr_stream *xdr,
1015                                 struct rpc_rqst *req,
1016                                 struct compound_hdr *hdr)
1017 {
1018         __be32 *p;
1019         struct rpc_auth *auth = req->rq_cred->cr_auth;
1020
1021         /* initialize running count of expected bytes in reply.
1022          * NOTE: the replied tag SHOULD be the same is the one sent,
1023          * but this is not required as a MUST for the server to do so. */
1024         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1025
1026         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1027         encode_string(xdr, hdr->taglen, hdr->tag);
1028         p = reserve_space(xdr, 8);
1029         *p++ = cpu_to_be32(hdr->minorversion);
1030         hdr->nops_p = p;
1031         *p = cpu_to_be32(hdr->nops);
1032 }
1033
1034 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1035                 uint32_t replen,
1036                 struct compound_hdr *hdr)
1037 {
1038         encode_uint32(xdr, op);
1039         hdr->nops++;
1040         hdr->replen += replen;
1041 }
1042
1043 static void encode_nops(struct compound_hdr *hdr)
1044 {
1045         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1046         *hdr->nops_p = htonl(hdr->nops);
1047 }
1048
1049 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1050 {
1051         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1052 }
1053
1054 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1055 {
1056         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1057 }
1058
1059 static __be32 *
1060 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1061 {
1062         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1063         *p++ = cpu_to_be32(t->tv_nsec);
1064         return p;
1065 }
1066
1067 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1068                                 const struct nfs4_label *label,
1069                                 const umode_t *umask,
1070                                 const struct nfs_server *server,
1071                                 const uint32_t attrmask[])
1072 {
1073         struct timespec ts;
1074         char owner_name[IDMAP_NAMESZ];
1075         char owner_group[IDMAP_NAMESZ];
1076         int owner_namelen = 0;
1077         int owner_grouplen = 0;
1078         __be32 *p;
1079         uint32_t len = 0;
1080         uint32_t bmval[3] = { 0 };
1081
1082         /*
1083          * We reserve enough space to write the entire attribute buffer at once.
1084          */
1085         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1086                 bmval[0] |= FATTR4_WORD0_SIZE;
1087                 len += 8;
1088         }
1089         if (iap->ia_valid & ATTR_MODE) {
1090                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1091                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1092                         len += 8;
1093                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1094                         bmval[1] |= FATTR4_WORD1_MODE;
1095                         len += 4;
1096                 }
1097         }
1098         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1099                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1100                 if (owner_namelen < 0) {
1101                         dprintk("nfs: couldn't resolve uid %d to string\n",
1102                                         from_kuid(&init_user_ns, iap->ia_uid));
1103                         /* XXX */
1104                         strcpy(owner_name, "nobody");
1105                         owner_namelen = sizeof("nobody") - 1;
1106                         /* goto out; */
1107                 }
1108                 bmval[1] |= FATTR4_WORD1_OWNER;
1109                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1110         }
1111         if ((iap->ia_valid & ATTR_GID) &&
1112            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1113                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1114                 if (owner_grouplen < 0) {
1115                         dprintk("nfs: couldn't resolve gid %d to string\n",
1116                                         from_kgid(&init_user_ns, iap->ia_gid));
1117                         strcpy(owner_group, "nobody");
1118                         owner_grouplen = sizeof("nobody") - 1;
1119                         /* goto out; */
1120                 }
1121                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1122                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1123         }
1124         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1125                 if (iap->ia_valid & ATTR_ATIME_SET) {
1126                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1127                         len += 4 + (nfstime4_maxsz << 2);
1128                 } else if (iap->ia_valid & ATTR_ATIME) {
1129                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1130                         len += 4;
1131                 }
1132         }
1133         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1134                 if (iap->ia_valid & ATTR_MTIME_SET) {
1135                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1136                         len += 4 + (nfstime4_maxsz << 2);
1137                 } else if (iap->ia_valid & ATTR_MTIME) {
1138                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1139                         len += 4;
1140                 }
1141         }
1142
1143         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1144                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1145                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1146         }
1147
1148         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1149         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1150
1151         if (bmval[0] & FATTR4_WORD0_SIZE)
1152                 p = xdr_encode_hyper(p, iap->ia_size);
1153         if (bmval[1] & FATTR4_WORD1_MODE)
1154                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1155         if (bmval[1] & FATTR4_WORD1_OWNER)
1156                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1157         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1158                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1159         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1160                 if (iap->ia_valid & ATTR_ATIME_SET) {
1161                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1162                         ts = timespec64_to_timespec(iap->ia_atime);
1163                         p = xdr_encode_nfstime4(p, &ts);
1164                 } else
1165                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166         }
1167         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168                 if (iap->ia_valid & ATTR_MTIME_SET) {
1169                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170                         ts = timespec64_to_timespec(iap->ia_mtime);
1171                         p = xdr_encode_nfstime4(p, &ts);
1172                 } else
1173                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1174         }
1175         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1176                 *p++ = cpu_to_be32(label->lfs);
1177                 *p++ = cpu_to_be32(label->pi);
1178                 *p++ = cpu_to_be32(label->len);
1179                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1180         }
1181         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1182                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1183                 *p++ = cpu_to_be32(*umask);
1184         }
1185
1186 /* out: */
1187 }
1188
1189 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1190 {
1191         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1192         encode_uint32(xdr, access);
1193 }
1194
1195 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1196 {
1197         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1198         encode_nfs4_seqid(xdr, arg->seqid);
1199         encode_nfs4_stateid(xdr, &arg->stateid);
1200 }
1201
1202 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1203 {
1204         __be32 *p;
1205
1206         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1207         p = reserve_space(xdr, 12);
1208         p = xdr_encode_hyper(p, args->offset);
1209         *p = cpu_to_be32(args->count);
1210 }
1211
1212 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1213 {
1214         __be32 *p;
1215
1216         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1217         encode_uint32(xdr, create->ftype);
1218
1219         switch (create->ftype) {
1220         case NF4LNK:
1221                 p = reserve_space(xdr, 4);
1222                 *p = cpu_to_be32(create->u.symlink.len);
1223                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1224                                 create->u.symlink.len);
1225                 xdr->buf->flags |= XDRBUF_WRITE;
1226                 break;
1227
1228         case NF4BLK: case NF4CHR:
1229                 p = reserve_space(xdr, 8);
1230                 *p++ = cpu_to_be32(create->u.device.specdata1);
1231                 *p = cpu_to_be32(create->u.device.specdata2);
1232                 break;
1233
1234         default:
1235                 break;
1236         }
1237
1238         encode_string(xdr, create->name->len, create->name->name);
1239         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1240                         create->server, create->server->attr_bitmask);
1241 }
1242
1243 static void encode_getattr(struct xdr_stream *xdr,
1244                 const __u32 *bitmap, const __u32 *mask, size_t len,
1245                 struct compound_hdr *hdr)
1246 {
1247         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1248
1249         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1250         if (mask) {
1251                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1252                         len = ARRAY_SIZE(masked_bitmap);
1253                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1254                 bitmap = masked_bitmap;
1255         }
1256         xdr_encode_bitmap4(xdr, bitmap, len);
1257 }
1258
1259 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1260 {
1261         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1262                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1263 }
1264
1265 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1266                                  const u32 *open_bitmap,
1267                                  struct compound_hdr *hdr)
1268 {
1269         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1270 }
1271
1272 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1273 {
1274         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1275                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1276 }
1277
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1281                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1282 }
1283
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292         encode_string(xdr, name->len, name->name);
1293 }
1294
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297         if (fl->fl_type == F_RDLCK)
1298                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304         if (fl->fl_end == OFFSET_MAX)
1305                 return ~(uint64_t)0;
1306         return fl->fl_end - fl->fl_start + 1;
1307 }
1308
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311         __be32 *p;
1312
1313         p = reserve_space(xdr, 32);
1314         p = xdr_encode_hyper(p, lowner->clientid);
1315         *p++ = cpu_to_be32(20);
1316         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317         *p++ = cpu_to_be32(lowner->s_dev);
1318         xdr_encode_hyper(p, lowner->id);
1319 }
1320
1321 /*
1322  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324  */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327         __be32 *p;
1328
1329         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330         p = reserve_space(xdr, 28);
1331         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332         *p++ = cpu_to_be32(args->reclaim);
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335         *p = cpu_to_be32(args->new_lock_owner);
1336         if (args->new_lock_owner){
1337                 encode_nfs4_seqid(xdr, args->open_seqid);
1338                 encode_nfs4_stateid(xdr, &args->open_stateid);
1339                 encode_nfs4_seqid(xdr, args->lock_seqid);
1340                 encode_lockowner(xdr, &args->lock_owner);
1341         }
1342         else {
1343                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344                 encode_nfs4_seqid(xdr, args->lock_seqid);
1345         }
1346 }
1347
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350         __be32 *p;
1351
1352         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353         p = reserve_space(xdr, 20);
1354         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357         encode_lockowner(xdr, &args->lock_owner);
1358 }
1359
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362         __be32 *p;
1363
1364         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366         encode_nfs4_seqid(xdr, args->seqid);
1367         encode_nfs4_stateid(xdr, &args->stateid);
1368         p = reserve_space(xdr, 16);
1369         p = xdr_encode_hyper(p, args->fl->fl_start);
1370         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376         encode_lockowner(xdr, lowner);
1377 }
1378
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382         encode_string(xdr, name->len, name->name);
1383 }
1384
1385 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386 {
1387         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388 }
1389
1390 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391 {
1392         __be32 *p;
1393
1394         p = reserve_space(xdr, 8);
1395         *p++ = cpu_to_be32(share_access);
1396         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1397 }
1398
1399 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         __be32 *p;
1402  /*
1403  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404  * owner 4 = 32
1405  */
1406         encode_nfs4_seqid(xdr, arg->seqid);
1407         encode_share_access(xdr, arg->share_access);
1408         p = reserve_space(xdr, 36);
1409         p = xdr_encode_hyper(p, arg->clientid);
1410         *p++ = cpu_to_be32(24);
1411         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412         *p++ = cpu_to_be32(arg->server->s_dev);
1413         *p++ = cpu_to_be32(arg->id.uniquifier);
1414         xdr_encode_hyper(p, arg->id.create_time);
1415 }
1416
1417 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419         __be32 *p;
1420
1421         p = reserve_space(xdr, 4);
1422         switch(arg->createmode) {
1423         case NFS4_CREATE_UNCHECKED:
1424                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426                                 arg->server, arg->server->attr_bitmask);
1427                 break;
1428         case NFS4_CREATE_GUARDED:
1429                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431                                 arg->server, arg->server->attr_bitmask);
1432                 break;
1433         case NFS4_CREATE_EXCLUSIVE:
1434                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1436                 break;
1437         case NFS4_CREATE_EXCLUSIVE4_1:
1438                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1440                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441                                 arg->server, arg->server->exclcreat_bitmask);
1442         }
1443 }
1444
1445 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446 {
1447         __be32 *p;
1448
1449         p = reserve_space(xdr, 4);
1450         switch (arg->open_flags & O_CREAT) {
1451         case 0:
1452                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453                 break;
1454         default:
1455                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456                 encode_createmode(xdr, arg);
1457         }
1458 }
1459
1460 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461 {
1462         __be32 *p;
1463
1464         p = reserve_space(xdr, 4);
1465         switch (delegation_type) {
1466         case 0:
1467                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468                 break;
1469         case FMODE_READ:
1470                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471                 break;
1472         case FMODE_WRITE|FMODE_READ:
1473                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474                 break;
1475         default:
1476                 BUG();
1477         }
1478 }
1479
1480 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481 {
1482         __be32 *p;
1483
1484         p = reserve_space(xdr, 4);
1485         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486         encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495         encode_delegation_type(xdr, type);
1496 }
1497
1498 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499 {
1500         __be32 *p;
1501
1502         p = reserve_space(xdr, 4);
1503         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504         encode_nfs4_stateid(xdr, stateid);
1505         encode_string(xdr, name->len, name->name);
1506 }
1507
1508 static inline void encode_claim_fh(struct xdr_stream *xdr)
1509 {
1510         __be32 *p;
1511
1512         p = reserve_space(xdr, 4);
1513         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514 }
1515
1516 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517 {
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, 4);
1521         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522         encode_nfs4_stateid(xdr, stateid);
1523 }
1524
1525 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526 {
1527         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528         encode_openhdr(xdr, arg);
1529         encode_opentype(xdr, arg);
1530         switch (arg->claim) {
1531         case NFS4_OPEN_CLAIM_NULL:
1532                 encode_claim_null(xdr, arg->name);
1533                 break;
1534         case NFS4_OPEN_CLAIM_PREVIOUS:
1535                 encode_claim_previous(xdr, arg->u.delegation_type);
1536                 break;
1537         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539                 break;
1540         case NFS4_OPEN_CLAIM_FH:
1541                 encode_claim_fh(xdr);
1542                 break;
1543         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545                 break;
1546         default:
1547                 BUG();
1548         }
1549 }
1550
1551 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554         encode_nfs4_stateid(xdr, arg->stateid);
1555         encode_nfs4_seqid(xdr, arg->seqid);
1556 }
1557
1558 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559 {
1560         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561         encode_nfs4_stateid(xdr, &arg->stateid);
1562         encode_nfs4_seqid(xdr, arg->seqid);
1563         encode_share_access(xdr, arg->share_access);
1564 }
1565
1566 static void
1567 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568 {
1569         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570         encode_string(xdr, fh->size, fh->data);
1571 }
1572
1573 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574 {
1575         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576 }
1577
1578 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579                         struct compound_hdr *hdr)
1580 {
1581         __be32 *p;
1582
1583         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584         encode_nfs4_stateid(xdr, &args->stateid);
1585
1586         p = reserve_space(xdr, 12);
1587         p = xdr_encode_hyper(p, args->offset);
1588         *p = cpu_to_be32(args->count);
1589 }
1590
1591 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592 {
1593         uint32_t attrs[3] = {
1594                 FATTR4_WORD0_RDATTR_ERROR,
1595                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1596         };
1597         uint32_t dircount = readdir->count >> 1;
1598         __be32 *p, verf[2];
1599         uint32_t attrlen = 0;
1600         unsigned int i;
1601
1602         if (readdir->plus) {
1603                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610                 dircount >>= 1;
1611         }
1612         /* Use mounted_on_fileid only if the server supports it */
1613         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614                 attrs[0] |= FATTR4_WORD0_FILEID;
1615         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616                 attrs[i] &= readdir->bitmask[i];
1617                 if (attrs[i] != 0)
1618                         attrlen = i+1;
1619         }
1620
1621         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622         encode_uint64(xdr, readdir->cookie);
1623         encode_nfs4_verifier(xdr, &readdir->verifier);
1624         p = reserve_space(xdr, 12 + (attrlen << 2));
1625         *p++ = cpu_to_be32(dircount);
1626         *p++ = cpu_to_be32(readdir->count);
1627         *p++ = cpu_to_be32(attrlen);
1628         for (i = 0; i < attrlen; i++)
1629                 *p++ = cpu_to_be32(attrs[i]);
1630         memcpy(verf, readdir->verifier.data, sizeof(verf));
1631
1632         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633                         __func__,
1634                         (unsigned long long)readdir->cookie,
1635                         verf[0], verf[1],
1636                         attrs[0] & readdir->bitmask[0],
1637                         attrs[1] & readdir->bitmask[1],
1638                         attrs[2] & readdir->bitmask[2]);
1639 }
1640
1641 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644 }
1645
1646 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647 {
1648         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649         encode_string(xdr, name->len, name->name);
1650 }
1651
1652 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653 {
1654         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655         encode_string(xdr, oldname->len, oldname->name);
1656         encode_string(xdr, newname->len, newname->name);
1657 }
1658
1659 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660                          struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663         encode_uint64(xdr, clid);
1664 }
1665
1666 static void
1667 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670 }
1671
1672 static void
1673 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674                 struct compound_hdr *hdr)
1675 {
1676         __be32 *p;
1677
1678         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679         encode_nfs4_stateid(xdr, &zero_stateid);
1680         p = reserve_space(xdr, 2*4);
1681         *p++ = cpu_to_be32(1);
1682         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683         p = reserve_space(xdr, 4);
1684         *p = cpu_to_be32(arg->acl_len);
1685         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686 }
1687
1688 static void
1689 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690 {
1691         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692 }
1693
1694 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695 {
1696         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697         encode_nfs4_stateid(xdr, &arg->stateid);
1698         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699                         server->attr_bitmask);
1700 }
1701
1702 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703 {
1704         __be32 *p;
1705
1706         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708
1709         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710                         setclientid->sc_clnt->cl_owner_id);
1711         p = reserve_space(xdr, 4);
1712         *p = cpu_to_be32(setclientid->sc_prog);
1713         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715         p = reserve_space(xdr, 4);
1716         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717 }
1718
1719 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720 {
1721         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722                         decode_setclientid_confirm_maxsz, hdr);
1723         encode_uint64(xdr, arg->clientid);
1724         encode_nfs4_verifier(xdr, &arg->confirm);
1725 }
1726
1727 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728                          struct compound_hdr *hdr)
1729 {
1730         __be32 *p;
1731
1732         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733         encode_nfs4_stateid(xdr, &args->stateid);
1734
1735         p = reserve_space(xdr, 16);
1736         p = xdr_encode_hyper(p, args->offset);
1737         *p++ = cpu_to_be32(args->stable);
1738         *p = cpu_to_be32(args->count);
1739
1740         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741 }
1742
1743 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744 {
1745         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746         encode_nfs4_stateid(xdr, stateid);
1747 }
1748
1749 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750 {
1751         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752         encode_string(xdr, name->len, name->name);
1753 }
1754
1755 #if defined(CONFIG_NFS_V4_1)
1756 /* NFSv4.1 operations */
1757 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758                                    const struct nfs41_bind_conn_to_session_args *args,
1759                                    struct compound_hdr *hdr)
1760 {
1761         __be32 *p;
1762
1763         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764                 decode_bind_conn_to_session_maxsz, hdr);
1765         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766         p = xdr_reserve_space(xdr, 8);
1767         *p++ = cpu_to_be32(args->dir);
1768         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769 }
1770
1771 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772 {
1773         unsigned int i;
1774         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776                 encode_uint32(xdr, op_map->u.words[i]);
1777 }
1778
1779 static void encode_exchange_id(struct xdr_stream *xdr,
1780                                const struct nfs41_exchange_id_args *args,
1781                                struct compound_hdr *hdr)
1782 {
1783         __be32 *p;
1784         char impl_name[IMPL_NAME_LIMIT];
1785         int len = 0;
1786
1787         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788         encode_nfs4_verifier(xdr, &args->verifier);
1789
1790         encode_string(xdr, strlen(args->client->cl_owner_id),
1791                         args->client->cl_owner_id);
1792
1793         encode_uint32(xdr, args->flags);
1794         encode_uint32(xdr, args->state_protect.how);
1795
1796         switch (args->state_protect.how) {
1797         case SP4_NONE:
1798                 break;
1799         case SP4_MACH_CRED:
1800                 encode_op_map(xdr, &args->state_protect.enforce);
1801                 encode_op_map(xdr, &args->state_protect.allow);
1802                 break;
1803         default:
1804                 WARN_ON_ONCE(1);
1805                 break;
1806         }
1807
1808         if (send_implementation_id &&
1809             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811                 <= sizeof(impl_name) + 1)
1812                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813                                utsname()->sysname, utsname()->release,
1814                                utsname()->version, utsname()->machine);
1815
1816         if (len > 0) {
1817                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1818
1819                 encode_string(xdr,
1820                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822                 encode_string(xdr, len, impl_name);
1823                 /* just send zeros for nii_date - the date is in nii_name */
1824                 p = reserve_space(xdr, 12);
1825                 p = xdr_encode_hyper(p, 0);
1826                 *p = cpu_to_be32(0);
1827         } else
1828                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1829 }
1830
1831 static void encode_create_session(struct xdr_stream *xdr,
1832                                   const struct nfs41_create_session_args *args,
1833                                   struct compound_hdr *hdr)
1834 {
1835         __be32 *p;
1836         struct nfs_client *clp = args->client;
1837         struct rpc_clnt *clnt = clp->cl_rpcclient;
1838         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839         u32 max_resp_sz_cached;
1840
1841         /*
1842          * Assumes OPEN is the biggest non-idempotent compound.
1843          * 2 is the verifier.
1844          */
1845         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1846                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1847
1848         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850         p = xdr_encode_hyper(p, args->clientid);
1851         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1852         *p++ = cpu_to_be32(args->flags);                        /*flags */
1853
1854         /* Fore Channel */
1855         *p++ = cpu_to_be32(0);                          /* header padding size */
1856         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1859         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1860         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1861         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1862
1863         /* Back Channel */
1864         *p++ = cpu_to_be32(0);                          /* header padding size */
1865         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1869         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1870         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1871
1872         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1873         *p++ = cpu_to_be32(1);
1874         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1875
1876         /* authsys_parms rfc1831 */
1877         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879         *p++ = cpu_to_be32(0);                          /* UID */
1880         *p++ = cpu_to_be32(0);                          /* GID */
1881         *p = cpu_to_be32(0);                            /* No more gids */
1882 }
1883
1884 static void encode_destroy_session(struct xdr_stream *xdr,
1885                                    const struct nfs4_session *session,
1886                                    struct compound_hdr *hdr)
1887 {
1888         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890 }
1891
1892 static void encode_destroy_clientid(struct xdr_stream *xdr,
1893                                    uint64_t clientid,
1894                                    struct compound_hdr *hdr)
1895 {
1896         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897         encode_uint64(xdr, clientid);
1898 }
1899
1900 static void encode_reclaim_complete(struct xdr_stream *xdr,
1901                                     const struct nfs41_reclaim_complete_args *args,
1902                                     struct compound_hdr *hdr)
1903 {
1904         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905         encode_uint32(xdr, args->one_fs);
1906 }
1907 #endif /* CONFIG_NFS_V4_1 */
1908
1909 static void encode_sequence(struct xdr_stream *xdr,
1910                             const struct nfs4_sequence_args *args,
1911                             struct compound_hdr *hdr)
1912 {
1913 #if defined(CONFIG_NFS_V4_1)
1914         struct nfs4_session *session;
1915         struct nfs4_slot_table *tp;
1916         struct nfs4_slot *slot = args->sa_slot;
1917         __be32 *p;
1918
1919         tp = slot->table;
1920         session = tp->session;
1921         if (!session)
1922                 return;
1923
1924         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925
1926         /*
1927          * Sessionid + seqid + slotid + max slotid + cache_this
1928          */
1929         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930                 "max_slotid=%d cache_this=%d\n",
1931                 __func__,
1932                 ((u32 *)session->sess_id.data)[0],
1933                 ((u32 *)session->sess_id.data)[1],
1934                 ((u32 *)session->sess_id.data)[2],
1935                 ((u32 *)session->sess_id.data)[3],
1936                 slot->seq_nr, slot->slot_nr,
1937                 tp->highest_used_slotid, args->sa_cache_this);
1938         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940         *p++ = cpu_to_be32(slot->seq_nr);
1941         *p++ = cpu_to_be32(slot->slot_nr);
1942         *p++ = cpu_to_be32(tp->highest_used_slotid);
1943         *p = cpu_to_be32(args->sa_cache_this);
1944 #endif /* CONFIG_NFS_V4_1 */
1945 }
1946
1947 #ifdef CONFIG_NFS_V4_1
1948 static void
1949 encode_getdeviceinfo(struct xdr_stream *xdr,
1950                      const struct nfs4_getdeviceinfo_args *args,
1951                      struct compound_hdr *hdr)
1952 {
1953         __be32 *p;
1954
1955         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958                                     NFS4_DEVICEID4_SIZE);
1959         *p++ = cpu_to_be32(args->pdev->layout_type);
1960         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1961
1962         p = reserve_space(xdr, 4 + 4);
1963         *p++ = cpu_to_be32(1);                  /* bitmap length */
1964         *p++ = cpu_to_be32(args->notify_types);
1965 }
1966
1967 static void
1968 encode_layoutget(struct xdr_stream *xdr,
1969                       const struct nfs4_layoutget_args *args,
1970                       struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975         p = reserve_space(xdr, 36);
1976         *p++ = cpu_to_be32(0);     /* Signal layout available */
1977         *p++ = cpu_to_be32(args->type);
1978         *p++ = cpu_to_be32(args->range.iomode);
1979         p = xdr_encode_hyper(p, args->range.offset);
1980         p = xdr_encode_hyper(p, args->range.length);
1981         p = xdr_encode_hyper(p, args->minlength);
1982         encode_nfs4_stateid(xdr, &args->stateid);
1983         encode_uint32(xdr, args->maxcount);
1984
1985         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986                 __func__,
1987                 args->type,
1988                 args->range.iomode,
1989                 (unsigned long)args->range.offset,
1990                 (unsigned long)args->range.length,
1991                 args->maxcount);
1992 }
1993
1994 static int
1995 encode_layoutcommit(struct xdr_stream *xdr,
1996                     struct inode *inode,
1997                     const struct nfs4_layoutcommit_args *args,
1998                     struct compound_hdr *hdr)
1999 {
2000         __be32 *p;
2001
2002         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004
2005         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006         p = reserve_space(xdr, 20);
2007         /* Only whole file layouts */
2008         p = xdr_encode_hyper(p, 0); /* offset */
2009         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2010         *p = cpu_to_be32(0); /* reclaim */
2011         encode_nfs4_stateid(xdr, &args->stateid);
2012         if (args->lastbytewritten != U64_MAX) {
2013                 p = reserve_space(xdr, 20);
2014                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015                 p = xdr_encode_hyper(p, args->lastbytewritten);
2016         } else {
2017                 p = reserve_space(xdr, 12);
2018                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019         }
2020         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022
2023         encode_uint32(xdr, args->layoutupdate_len);
2024         if (args->layoutupdate_pages)
2025                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026                                 args->layoutupdate_len);
2027
2028         return 0;
2029 }
2030
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033                     const struct nfs4_layoutreturn_args *args,
2034                     struct compound_hdr *hdr)
2035 {
2036         __be32 *p;
2037
2038         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039         p = reserve_space(xdr, 16);
2040         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2041         *p++ = cpu_to_be32(args->layout_type);
2042         *p++ = cpu_to_be32(args->range.iomode);
2043         *p = cpu_to_be32(RETURN_FILE);
2044         p = reserve_space(xdr, 16);
2045         p = xdr_encode_hyper(p, args->range.offset);
2046         p = xdr_encode_hyper(p, args->range.length);
2047         spin_lock(&args->inode->i_lock);
2048         encode_nfs4_stateid(xdr, &args->stateid);
2049         spin_unlock(&args->inode->i_lock);
2050         if (args->ld_private->ops && args->ld_private->ops->encode)
2051                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052         else
2053                 encode_uint32(xdr, 0);
2054 }
2055
2056 static int
2057 encode_secinfo_no_name(struct xdr_stream *xdr,
2058                        const struct nfs41_secinfo_no_name_args *args,
2059                        struct compound_hdr *hdr)
2060 {
2061         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062         encode_uint32(xdr, args->style);
2063         return 0;
2064 }
2065
2066 static void encode_test_stateid(struct xdr_stream *xdr,
2067                                 const struct nfs41_test_stateid_args *args,
2068                                 struct compound_hdr *hdr)
2069 {
2070         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071         encode_uint32(xdr, 1);
2072         encode_nfs4_stateid(xdr, args->stateid);
2073 }
2074
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076                                 const struct nfs41_free_stateid_args *args,
2077                                 struct compound_hdr *hdr)
2078 {
2079         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080         encode_nfs4_stateid(xdr, &args->stateid);
2081 }
2082 #else
2083 static inline void
2084 encode_layoutreturn(struct xdr_stream *xdr,
2085                     const struct nfs4_layoutreturn_args *args,
2086                     struct compound_hdr *hdr)
2087 {
2088 }
2089
2090 static void
2091 encode_layoutget(struct xdr_stream *xdr,
2092                       const struct nfs4_layoutget_args *args,
2093                       struct compound_hdr *hdr)
2094 {
2095 }
2096 #endif /* CONFIG_NFS_V4_1 */
2097
2098 /*
2099  * END OF "GENERIC" ENCODE ROUTINES.
2100  */
2101
2102 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2103 {
2104 #if defined(CONFIG_NFS_V4_1)
2105         struct nfs4_session *session = args->sa_slot->table->session;
2106         if (session)
2107                 return session->clp->cl_mvops->minor_version;
2108 #endif /* CONFIG_NFS_V4_1 */
2109         return 0;
2110 }
2111
2112 /*
2113  * Encode an ACCESS request
2114  */
2115 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2116                                 const void *data)
2117 {
2118         const struct nfs4_accessargs *args = data;
2119         struct compound_hdr hdr = {
2120                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121         };
2122
2123         encode_compound_hdr(xdr, req, &hdr);
2124         encode_sequence(xdr, &args->seq_args, &hdr);
2125         encode_putfh(xdr, args->fh, &hdr);
2126         encode_access(xdr, args->access, &hdr);
2127         if (args->bitmask)
2128                 encode_getfattr(xdr, args->bitmask, &hdr);
2129         encode_nops(&hdr);
2130 }
2131
2132 /*
2133  * Encode LOOKUP request
2134  */
2135 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2136                                 const void *data)
2137 {
2138         const struct nfs4_lookup_arg *args = data;
2139         struct compound_hdr hdr = {
2140                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2141         };
2142
2143         encode_compound_hdr(xdr, req, &hdr);
2144         encode_sequence(xdr, &args->seq_args, &hdr);
2145         encode_putfh(xdr, args->dir_fh, &hdr);
2146         encode_lookup(xdr, args->name, &hdr);
2147         encode_getfh(xdr, &hdr);
2148         encode_getfattr(xdr, args->bitmask, &hdr);
2149         encode_nops(&hdr);
2150 }
2151
2152 /*
2153  * Encode LOOKUPP request
2154  */
2155 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2156                 const void *data)
2157 {
2158         const struct nfs4_lookupp_arg *args = data;
2159         struct compound_hdr hdr = {
2160                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2161         };
2162
2163         encode_compound_hdr(xdr, req, &hdr);
2164         encode_sequence(xdr, &args->seq_args, &hdr);
2165         encode_putfh(xdr, args->fh, &hdr);
2166         encode_lookupp(xdr, &hdr);
2167         encode_getfh(xdr, &hdr);
2168         encode_getfattr(xdr, args->bitmask, &hdr);
2169         encode_nops(&hdr);
2170 }
2171
2172 /*
2173  * Encode LOOKUP_ROOT request
2174  */
2175 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2176                                      struct xdr_stream *xdr,
2177                                      const void *data)
2178 {
2179         const struct nfs4_lookup_root_arg *args = data;
2180         struct compound_hdr hdr = {
2181                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2182         };
2183
2184         encode_compound_hdr(xdr, req, &hdr);
2185         encode_sequence(xdr, &args->seq_args, &hdr);
2186         encode_putrootfh(xdr, &hdr);
2187         encode_getfh(xdr, &hdr);
2188         encode_getfattr(xdr, args->bitmask, &hdr);
2189         encode_nops(&hdr);
2190 }
2191
2192 /*
2193  * Encode REMOVE request
2194  */
2195 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2196                                 const void *data)
2197 {
2198         const struct nfs_removeargs *args = data;
2199         struct compound_hdr hdr = {
2200                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201         };
2202
2203         encode_compound_hdr(xdr, req, &hdr);
2204         encode_sequence(xdr, &args->seq_args, &hdr);
2205         encode_putfh(xdr, args->fh, &hdr);
2206         encode_remove(xdr, &args->name, &hdr);
2207         encode_nops(&hdr);
2208 }
2209
2210 /*
2211  * Encode RENAME request
2212  */
2213 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2214                                 const void *data)
2215 {
2216         const struct nfs_renameargs *args = data;
2217         struct compound_hdr hdr = {
2218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219         };
2220
2221         encode_compound_hdr(xdr, req, &hdr);
2222         encode_sequence(xdr, &args->seq_args, &hdr);
2223         encode_putfh(xdr, args->old_dir, &hdr);
2224         encode_savefh(xdr, &hdr);
2225         encode_putfh(xdr, args->new_dir, &hdr);
2226         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2227         encode_nops(&hdr);
2228 }
2229
2230 /*
2231  * Encode LINK request
2232  */
2233 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2234                               const void *data)
2235 {
2236         const struct nfs4_link_arg *args = data;
2237         struct compound_hdr hdr = {
2238                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2239         };
2240
2241         encode_compound_hdr(xdr, req, &hdr);
2242         encode_sequence(xdr, &args->seq_args, &hdr);
2243         encode_putfh(xdr, args->fh, &hdr);
2244         encode_savefh(xdr, &hdr);
2245         encode_putfh(xdr, args->dir_fh, &hdr);
2246         encode_link(xdr, args->name, &hdr);
2247         encode_restorefh(xdr, &hdr);
2248         encode_getfattr(xdr, args->bitmask, &hdr);
2249         encode_nops(&hdr);
2250 }
2251
2252 /*
2253  * Encode CREATE request
2254  */
2255 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2256                                 const void *data)
2257 {
2258         const struct nfs4_create_arg *args = data;
2259         struct compound_hdr hdr = {
2260                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261         };
2262
2263         encode_compound_hdr(xdr, req, &hdr);
2264         encode_sequence(xdr, &args->seq_args, &hdr);
2265         encode_putfh(xdr, args->dir_fh, &hdr);
2266         encode_create(xdr, args, &hdr);
2267         encode_getfh(xdr, &hdr);
2268         encode_getfattr(xdr, args->bitmask, &hdr);
2269         encode_nops(&hdr);
2270 }
2271
2272 /*
2273  * Encode SYMLINK request
2274  */
2275 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2276                                  const void *data)
2277 {
2278         const struct nfs4_create_arg *args = data;
2279
2280         nfs4_xdr_enc_create(req, xdr, args);
2281 }
2282
2283 /*
2284  * Encode GETATTR request
2285  */
2286 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                                  const void *data)
2288 {
2289         const struct nfs4_getattr_arg *args = data;
2290         struct compound_hdr hdr = {
2291                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2292         };
2293
2294         encode_compound_hdr(xdr, req, &hdr);
2295         encode_sequence(xdr, &args->seq_args, &hdr);
2296         encode_putfh(xdr, args->fh, &hdr);
2297         encode_getfattr(xdr, args->bitmask, &hdr);
2298         encode_nops(&hdr);
2299 }
2300
2301 /*
2302  * Encode a CLOSE request
2303  */
2304 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2305                                const void *data)
2306 {
2307         const struct nfs_closeargs *args = data;
2308         struct compound_hdr hdr = {
2309                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310         };
2311
2312         encode_compound_hdr(xdr, req, &hdr);
2313         encode_sequence(xdr, &args->seq_args, &hdr);
2314         encode_putfh(xdr, args->fh, &hdr);
2315         if (args->lr_args)
2316                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2317         if (args->bitmask != NULL)
2318                 encode_getfattr(xdr, args->bitmask, &hdr);
2319         encode_close(xdr, args, &hdr);
2320         encode_nops(&hdr);
2321 }
2322
2323 /*
2324  * Encode an OPEN request
2325  */
2326 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2327                               const void *data)
2328 {
2329         const struct nfs_openargs *args = data;
2330         struct compound_hdr hdr = {
2331                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332         };
2333
2334         encode_compound_hdr(xdr, req, &hdr);
2335         encode_sequence(xdr, &args->seq_args, &hdr);
2336         encode_putfh(xdr, args->fh, &hdr);
2337         encode_open(xdr, args, &hdr);
2338         encode_getfh(xdr, &hdr);
2339         if (args->access)
2340                 encode_access(xdr, args->access, &hdr);
2341         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2342         if (args->lg_args) {
2343                 encode_layoutget(xdr, args->lg_args, &hdr);
2344                 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2345                                  args->lg_args->layout.pages,
2346                                  0, args->lg_args->layout.pglen);
2347         }
2348         encode_nops(&hdr);
2349 }
2350
2351 /*
2352  * Encode an OPEN_CONFIRM request
2353  */
2354 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2355                                       struct xdr_stream *xdr,
2356                                       const void *data)
2357 {
2358         const struct nfs_open_confirmargs *args = data;
2359         struct compound_hdr hdr = {
2360                 .nops   = 0,
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_putfh(xdr, args->fh, &hdr);
2365         encode_open_confirm(xdr, args, &hdr);
2366         encode_nops(&hdr);
2367 }
2368
2369 /*
2370  * Encode an OPEN request with no attributes.
2371  */
2372 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2373                                      struct xdr_stream *xdr,
2374                                      const void *data)
2375 {
2376         const struct nfs_openargs *args = data;
2377         struct compound_hdr hdr = {
2378                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2379         };
2380
2381         encode_compound_hdr(xdr, req, &hdr);
2382         encode_sequence(xdr, &args->seq_args, &hdr);
2383         encode_putfh(xdr, args->fh, &hdr);
2384         encode_open(xdr, args, &hdr);
2385         if (args->access)
2386                 encode_access(xdr, args->access, &hdr);
2387         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2388         if (args->lg_args) {
2389                 encode_layoutget(xdr, args->lg_args, &hdr);
2390                 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2391                                  args->lg_args->layout.pages,
2392                                  0, args->lg_args->layout.pglen);
2393         }
2394         encode_nops(&hdr);
2395 }
2396
2397 /*
2398  * Encode an OPEN_DOWNGRADE request
2399  */
2400 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2401                                         struct xdr_stream *xdr,
2402                                         const void *data)
2403 {
2404         const struct nfs_closeargs *args = data;
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408
2409         encode_compound_hdr(xdr, req, &hdr);
2410         encode_sequence(xdr, &args->seq_args, &hdr);
2411         encode_putfh(xdr, args->fh, &hdr);
2412         if (args->lr_args)
2413                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2414         encode_open_downgrade(xdr, args, &hdr);
2415         encode_nops(&hdr);
2416 }
2417
2418 /*
2419  * Encode a LOCK request
2420  */
2421 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2422                               const void *data)
2423 {
2424         const struct nfs_lock_args *args = data;
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427         };
2428
2429         encode_compound_hdr(xdr, req, &hdr);
2430         encode_sequence(xdr, &args->seq_args, &hdr);
2431         encode_putfh(xdr, args->fh, &hdr);
2432         encode_lock(xdr, args, &hdr);
2433         encode_nops(&hdr);
2434 }
2435
2436 /*
2437  * Encode a LOCKT request
2438  */
2439 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                                const void *data)
2441 {
2442         const struct nfs_lockt_args *args = data;
2443         struct compound_hdr hdr = {
2444                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445         };
2446
2447         encode_compound_hdr(xdr, req, &hdr);
2448         encode_sequence(xdr, &args->seq_args, &hdr);
2449         encode_putfh(xdr, args->fh, &hdr);
2450         encode_lockt(xdr, args, &hdr);
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode a LOCKU request
2456  */
2457 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                                const void *data)
2459 {
2460         const struct nfs_locku_args *args = data;
2461         struct compound_hdr hdr = {
2462                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2463         };
2464
2465         encode_compound_hdr(xdr, req, &hdr);
2466         encode_sequence(xdr, &args->seq_args, &hdr);
2467         encode_putfh(xdr, args->fh, &hdr);
2468         encode_locku(xdr, args, &hdr);
2469         encode_nops(&hdr);
2470 }
2471
2472 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2473                                            struct xdr_stream *xdr,
2474                                            const void *data)
2475 {
2476         const struct nfs_release_lockowner_args *args = data;
2477         struct compound_hdr hdr = {
2478                 .minorversion = 0,
2479         };
2480
2481         encode_compound_hdr(xdr, req, &hdr);
2482         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2483         encode_nops(&hdr);
2484 }
2485
2486 /*
2487  * Encode a READLINK request
2488  */
2489 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2490                                   const void *data)
2491 {
2492         const struct nfs4_readlink *args = data;
2493         struct compound_hdr hdr = {
2494                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2495         };
2496
2497         encode_compound_hdr(xdr, req, &hdr);
2498         encode_sequence(xdr, &args->seq_args, &hdr);
2499         encode_putfh(xdr, args->fh, &hdr);
2500         encode_readlink(xdr, args, req, &hdr);
2501
2502         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2503                         args->pgbase, args->pglen);
2504         encode_nops(&hdr);
2505 }
2506
2507 /*
2508  * Encode a READDIR request
2509  */
2510 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2511                                  const void *data)
2512 {
2513         const struct nfs4_readdir_arg *args = data;
2514         struct compound_hdr hdr = {
2515                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516         };
2517
2518         encode_compound_hdr(xdr, req, &hdr);
2519         encode_sequence(xdr, &args->seq_args, &hdr);
2520         encode_putfh(xdr, args->fh, &hdr);
2521         encode_readdir(xdr, args, req, &hdr);
2522
2523         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2524                          args->pgbase, args->count);
2525         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2526                         __func__, hdr.replen << 2, args->pages,
2527                         args->pgbase, args->count);
2528         encode_nops(&hdr);
2529 }
2530
2531 /*
2532  * Encode a READ request
2533  */
2534 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2535                               const void *data)
2536 {
2537         const struct nfs_pgio_args *args = data;
2538         struct compound_hdr hdr = {
2539                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_sequence(xdr, &args->seq_args, &hdr);
2544         encode_putfh(xdr, args->fh, &hdr);
2545         encode_read(xdr, args, &hdr);
2546
2547         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2548                          args->pages, args->pgbase, args->count);
2549         req->rq_rcv_buf.flags |= XDRBUF_READ;
2550         encode_nops(&hdr);
2551 }
2552
2553 /*
2554  * Encode an SETATTR request
2555  */
2556 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2557                                  const void *data)
2558 {
2559         const struct nfs_setattrargs *args = data;
2560         struct compound_hdr hdr = {
2561                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2562         };
2563
2564         encode_compound_hdr(xdr, req, &hdr);
2565         encode_sequence(xdr, &args->seq_args, &hdr);
2566         encode_putfh(xdr, args->fh, &hdr);
2567         encode_setattr(xdr, args, args->server, &hdr);
2568         encode_getfattr(xdr, args->bitmask, &hdr);
2569         encode_nops(&hdr);
2570 }
2571
2572 /*
2573  * Encode a GETACL request
2574  */
2575 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2576                                 const void *data)
2577 {
2578         const struct nfs_getaclargs *args = data;
2579         struct compound_hdr hdr = {
2580                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581         };
2582         const __u32 nfs4_acl_bitmap[1] = {
2583                 [0] = FATTR4_WORD0_ACL,
2584         };
2585         uint32_t replen;
2586
2587         encode_compound_hdr(xdr, req, &hdr);
2588         encode_sequence(xdr, &args->seq_args, &hdr);
2589         encode_putfh(xdr, args->fh, &hdr);
2590         replen = hdr.replen + op_decode_hdr_maxsz;
2591         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2592                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2593
2594         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2595                 args->acl_pages, 0, args->acl_len);
2596
2597         encode_nops(&hdr);
2598 }
2599
2600 /*
2601  * Encode a WRITE request
2602  */
2603 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2604                                const void *data)
2605 {
2606         const struct nfs_pgio_args *args = data;
2607         struct compound_hdr hdr = {
2608                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2609         };
2610
2611         encode_compound_hdr(xdr, req, &hdr);
2612         encode_sequence(xdr, &args->seq_args, &hdr);
2613         encode_putfh(xdr, args->fh, &hdr);
2614         encode_write(xdr, args, &hdr);
2615         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2616         if (args->bitmask)
2617                 encode_getfattr(xdr, args->bitmask, &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  *  a COMMIT request
2623  */
2624 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2625                                 const void *data)
2626 {
2627         const struct nfs_commitargs *args = data;
2628         struct compound_hdr hdr = {
2629                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630         };
2631
2632         encode_compound_hdr(xdr, req, &hdr);
2633         encode_sequence(xdr, &args->seq_args, &hdr);
2634         encode_putfh(xdr, args->fh, &hdr);
2635         encode_commit(xdr, args, &hdr);
2636         encode_nops(&hdr);
2637 }
2638
2639 /*
2640  * FSINFO request
2641  */
2642 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2643                                 const void *data)
2644 {
2645         const struct nfs4_fsinfo_arg *args = data;
2646         struct compound_hdr hdr = {
2647                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2648         };
2649
2650         encode_compound_hdr(xdr, req, &hdr);
2651         encode_sequence(xdr, &args->seq_args, &hdr);
2652         encode_putfh(xdr, args->fh, &hdr);
2653         encode_fsinfo(xdr, args->bitmask, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * a PATHCONF request
2659  */
2660 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2661                                   const void *data)
2662 {
2663         const struct nfs4_pathconf_arg *args = data;
2664         struct compound_hdr hdr = {
2665                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_sequence(xdr, &args->seq_args, &hdr);
2670         encode_putfh(xdr, args->fh, &hdr);
2671         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2672                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 /*
2677  * a STATFS request
2678  */
2679 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2680                                 const void *data)
2681 {
2682         const struct nfs4_statfs_arg *args = data;
2683         struct compound_hdr hdr = {
2684                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685         };
2686
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_sequence(xdr, &args->seq_args, &hdr);
2689         encode_putfh(xdr, args->fh, &hdr);
2690         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2691                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2692         encode_nops(&hdr);
2693 }
2694
2695 /*
2696  * GETATTR_BITMAP request
2697  */
2698 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2699                                      struct xdr_stream *xdr,
2700                                      const void *data)
2701 {
2702         const struct nfs4_server_caps_arg *args = data;
2703         const u32 *bitmask = args->bitmask;
2704         struct compound_hdr hdr = {
2705                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2706         };
2707
2708         encode_compound_hdr(xdr, req, &hdr);
2709         encode_sequence(xdr, &args->seq_args, &hdr);
2710         encode_putfh(xdr, args->fhandle, &hdr);
2711         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2712         encode_nops(&hdr);
2713 }
2714
2715 /*
2716  * a RENEW request
2717  */
2718 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2719                                const void *data)
2720
2721 {
2722         const struct nfs_client *clp = data;
2723         struct compound_hdr hdr = {
2724                 .nops   = 0,
2725         };
2726
2727         encode_compound_hdr(xdr, req, &hdr);
2728         encode_renew(xdr, clp->cl_clientid, &hdr);
2729         encode_nops(&hdr);
2730 }
2731
2732 /*
2733  * a SETCLIENTID request
2734  */
2735 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2736                                      struct xdr_stream *xdr,
2737                                      const void *data)
2738 {
2739         const struct nfs4_setclientid *sc = data;
2740         struct compound_hdr hdr = {
2741                 .nops   = 0,
2742         };
2743
2744         encode_compound_hdr(xdr, req, &hdr);
2745         encode_setclientid(xdr, sc, &hdr);
2746         encode_nops(&hdr);
2747 }
2748
2749 /*
2750  * a SETCLIENTID_CONFIRM request
2751  */
2752 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2753                                              struct xdr_stream *xdr,
2754                                              const void *data)
2755 {
2756         const struct nfs4_setclientid_res *arg = data;
2757         struct compound_hdr hdr = {
2758                 .nops   = 0,
2759         };
2760
2761         encode_compound_hdr(xdr, req, &hdr);
2762         encode_setclientid_confirm(xdr, arg, &hdr);
2763         encode_nops(&hdr);
2764 }
2765
2766 /*
2767  * DELEGRETURN request
2768  */
2769 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2770                                      struct xdr_stream *xdr,
2771                                      const void *data)
2772 {
2773         const struct nfs4_delegreturnargs *args = data;
2774         struct compound_hdr hdr = {
2775                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2776         };
2777
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_sequence(xdr, &args->seq_args, &hdr);
2780         encode_putfh(xdr, args->fhandle, &hdr);
2781         if (args->lr_args)
2782                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2783         if (args->bitmask)
2784                 encode_getfattr(xdr, args->bitmask, &hdr);
2785         encode_delegreturn(xdr, args->stateid, &hdr);
2786         encode_nops(&hdr);
2787 }
2788
2789 /*
2790  * Encode FS_LOCATIONS request
2791  */
2792 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2793                                       struct xdr_stream *xdr,
2794                                       const void *data)
2795 {
2796         const struct nfs4_fs_locations_arg *args = data;
2797         struct compound_hdr hdr = {
2798                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2799         };
2800         uint32_t replen;
2801
2802         encode_compound_hdr(xdr, req, &hdr);
2803         encode_sequence(xdr, &args->seq_args, &hdr);
2804         if (args->migration) {
2805                 encode_putfh(xdr, args->fh, &hdr);
2806                 replen = hdr.replen;
2807                 encode_fs_locations(xdr, args->bitmask, &hdr);
2808                 if (args->renew)
2809                         encode_renew(xdr, args->clientid, &hdr);
2810         } else {
2811                 encode_putfh(xdr, args->dir_fh, &hdr);
2812                 encode_lookup(xdr, args->name, &hdr);
2813                 replen = hdr.replen;
2814                 encode_fs_locations(xdr, args->bitmask, &hdr);
2815         }
2816
2817         /* Set up reply kvec to capture returned fs_locations array. */
2818         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2819                          (struct page **)&args->page, 0, PAGE_SIZE);
2820         encode_nops(&hdr);
2821 }
2822
2823 /*
2824  * Encode SECINFO request
2825  */
2826 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2827                                 struct xdr_stream *xdr,
2828                                 const void *data)
2829 {
2830         const struct nfs4_secinfo_arg *args = data;
2831         struct compound_hdr hdr = {
2832                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2833         };
2834
2835         encode_compound_hdr(xdr, req, &hdr);
2836         encode_sequence(xdr, &args->seq_args, &hdr);
2837         encode_putfh(xdr, args->dir_fh, &hdr);
2838         encode_secinfo(xdr, args->name, &hdr);
2839         encode_nops(&hdr);
2840 }
2841
2842 /*
2843  * Encode FSID_PRESENT request
2844  */
2845 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2846                                       struct xdr_stream *xdr,
2847                                       const void *data)
2848 {
2849         const struct nfs4_fsid_present_arg *args = data;
2850         struct compound_hdr hdr = {
2851                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2852         };
2853
2854         encode_compound_hdr(xdr, req, &hdr);
2855         encode_sequence(xdr, &args->seq_args, &hdr);
2856         encode_putfh(xdr, args->fh, &hdr);
2857         encode_getfh(xdr, &hdr);
2858         if (args->renew)
2859                 encode_renew(xdr, args->clientid, &hdr);
2860         encode_nops(&hdr);
2861 }
2862
2863 #if defined(CONFIG_NFS_V4_1)
2864 /*
2865  * BIND_CONN_TO_SESSION request
2866  */
2867 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2868                                 struct xdr_stream *xdr,
2869                                 const void *data)
2870 {
2871         const struct nfs41_bind_conn_to_session_args *args = data;
2872         struct compound_hdr hdr = {
2873                 .minorversion = args->client->cl_mvops->minor_version,
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_bind_conn_to_session(xdr, args, &hdr);
2878         encode_nops(&hdr);
2879 }
2880
2881 /*
2882  * EXCHANGE_ID request
2883  */
2884 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2885                                      struct xdr_stream *xdr,
2886                                      const void *data)
2887 {
2888         const struct nfs41_exchange_id_args *args = data;
2889         struct compound_hdr hdr = {
2890                 .minorversion = args->client->cl_mvops->minor_version,
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_exchange_id(xdr, args, &hdr);
2895         encode_nops(&hdr);
2896 }
2897
2898 /*
2899  * a CREATE_SESSION request
2900  */
2901 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2902                                         struct xdr_stream *xdr,
2903                                         const void *data)
2904 {
2905         const struct nfs41_create_session_args *args = data;
2906         struct compound_hdr hdr = {
2907                 .minorversion = args->client->cl_mvops->minor_version,
2908         };
2909
2910         encode_compound_hdr(xdr, req, &hdr);
2911         encode_create_session(xdr, args, &hdr);
2912         encode_nops(&hdr);
2913 }
2914
2915 /*
2916  * a DESTROY_SESSION request
2917  */
2918 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2919                                          struct xdr_stream *xdr,
2920                                          const void *data)
2921 {
2922         const struct nfs4_session *session = data;
2923         struct compound_hdr hdr = {
2924                 .minorversion = session->clp->cl_mvops->minor_version,
2925         };
2926
2927         encode_compound_hdr(xdr, req, &hdr);
2928         encode_destroy_session(xdr, session, &hdr);
2929         encode_nops(&hdr);
2930 }
2931
2932 /*
2933  * a DESTROY_CLIENTID request
2934  */
2935 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2936                                          struct xdr_stream *xdr,
2937                                          const void *data)
2938 {
2939         const struct nfs_client *clp = data;
2940         struct compound_hdr hdr = {
2941                 .minorversion = clp->cl_mvops->minor_version,
2942         };
2943
2944         encode_compound_hdr(xdr, req, &hdr);
2945         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2946         encode_nops(&hdr);
2947 }
2948
2949 /*
2950  * a SEQUENCE request
2951  */
2952 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2953                                   const void *data)
2954 {
2955         const struct nfs4_sequence_args *args = data;
2956         struct compound_hdr hdr = {
2957                 .minorversion = nfs4_xdr_minorversion(args),
2958         };
2959
2960         encode_compound_hdr(xdr, req, &hdr);
2961         encode_sequence(xdr, args, &hdr);
2962         encode_nops(&hdr);
2963 }
2964
2965 /*
2966  * a GET_LEASE_TIME request
2967  */
2968 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2969                                         struct xdr_stream *xdr,
2970                                         const void *data)
2971 {
2972         const struct nfs4_get_lease_time_args *args = data;
2973         struct compound_hdr hdr = {
2974                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2975         };
2976         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2977
2978         encode_compound_hdr(xdr, req, &hdr);
2979         encode_sequence(xdr, &args->la_seq_args, &hdr);
2980         encode_putrootfh(xdr, &hdr);
2981         encode_fsinfo(xdr, lease_bitmap, &hdr);
2982         encode_nops(&hdr);
2983 }
2984
2985 /*
2986  * a RECLAIM_COMPLETE request
2987  */
2988 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2989                                           struct xdr_stream *xdr,
2990                                           const void *data)
2991 {
2992         const struct nfs41_reclaim_complete_args *args = data;
2993         struct compound_hdr hdr = {
2994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2995         };
2996
2997         encode_compound_hdr(xdr, req, &hdr);
2998         encode_sequence(xdr, &args->seq_args, &hdr);
2999         encode_reclaim_complete(xdr, args, &hdr);
3000         encode_nops(&hdr);
3001 }
3002
3003 /*
3004  * Encode GETDEVICEINFO request
3005  */
3006 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3007                                        struct xdr_stream *xdr,
3008                                        const void *data)
3009 {
3010         const struct nfs4_getdeviceinfo_args *args = data;
3011         struct compound_hdr hdr = {
3012                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3013         };
3014
3015         encode_compound_hdr(xdr, req, &hdr);
3016         encode_sequence(xdr, &args->seq_args, &hdr);
3017         encode_getdeviceinfo(xdr, args, &hdr);
3018
3019         /* set up reply kvec. Subtract notification bitmap max size (2)
3020          * so that notification bitmap is put in xdr_buf tail */
3021         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
3022                          args->pdev->pages, args->pdev->pgbase,
3023                          args->pdev->pglen);
3024
3025         encode_nops(&hdr);
3026 }
3027
3028 /*
3029  *  Encode LAYOUTGET request
3030  */
3031 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3032                                    struct xdr_stream *xdr,
3033                                    const void *data)
3034 {
3035         const struct nfs4_layoutget_args *args = data;
3036         struct compound_hdr hdr = {
3037                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3038         };
3039
3040         encode_compound_hdr(xdr, req, &hdr);
3041         encode_sequence(xdr, &args->seq_args, &hdr);
3042         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3043         encode_layoutget(xdr, args, &hdr);
3044
3045         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3046             args->layout.pages, 0, args->layout.pglen);
3047
3048         encode_nops(&hdr);
3049 }
3050
3051 /*
3052  *  Encode LAYOUTCOMMIT request
3053  */
3054 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3055                                       struct xdr_stream *xdr,
3056                                       const void *priv)
3057 {
3058         const struct nfs4_layoutcommit_args *args = priv;
3059         struct nfs4_layoutcommit_data *data =
3060                 container_of(args, struct nfs4_layoutcommit_data, args);
3061         struct compound_hdr hdr = {
3062                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3063         };
3064
3065         encode_compound_hdr(xdr, req, &hdr);
3066         encode_sequence(xdr, &args->seq_args, &hdr);
3067         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3068         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3069         encode_getfattr(xdr, args->bitmask, &hdr);
3070         encode_nops(&hdr);
3071 }
3072
3073 /*
3074  * Encode LAYOUTRETURN request
3075  */
3076 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3077                                       struct xdr_stream *xdr,
3078                                       const void *data)
3079 {
3080         const struct nfs4_layoutreturn_args *args = data;
3081         struct compound_hdr hdr = {
3082                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3083         };
3084
3085         encode_compound_hdr(xdr, req, &hdr);
3086         encode_sequence(xdr, &args->seq_args, &hdr);
3087         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3088         encode_layoutreturn(xdr, args, &hdr);
3089         encode_nops(&hdr);
3090 }
3091
3092 /*
3093  * Encode SECINFO_NO_NAME request
3094  */
3095 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3096                                         struct xdr_stream *xdr,
3097                                         const void *data)
3098 {
3099         const struct nfs41_secinfo_no_name_args *args = data;
3100         struct compound_hdr hdr = {
3101                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3102         };
3103
3104         encode_compound_hdr(xdr, req, &hdr);
3105         encode_sequence(xdr, &args->seq_args, &hdr);
3106         encode_putrootfh(xdr, &hdr);
3107         encode_secinfo_no_name(xdr, args, &hdr);
3108         encode_nops(&hdr);
3109 }
3110
3111 /*
3112  *  Encode TEST_STATEID request
3113  */
3114 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3115                                       struct xdr_stream *xdr,
3116                                       const void *data)
3117 {
3118         const struct nfs41_test_stateid_args *args = data;
3119         struct compound_hdr hdr = {
3120                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3121         };
3122
3123         encode_compound_hdr(xdr, req, &hdr);
3124         encode_sequence(xdr, &args->seq_args, &hdr);
3125         encode_test_stateid(xdr, args, &hdr);
3126         encode_nops(&hdr);
3127 }
3128
3129 /*
3130  *  Encode FREE_STATEID request
3131  */
3132 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3133                                      struct xdr_stream *xdr,
3134                                      const void *data)
3135 {
3136         const struct nfs41_free_stateid_args *args = data;
3137         struct compound_hdr hdr = {
3138                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3139         };
3140
3141         encode_compound_hdr(xdr, req, &hdr);
3142         encode_sequence(xdr, &args->seq_args, &hdr);
3143         encode_free_stateid(xdr, args, &hdr);
3144         encode_nops(&hdr);
3145 }
3146 #endif /* CONFIG_NFS_V4_1 */
3147
3148 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3149 {
3150         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3151                         NFS4_OPAQUE_LIMIT);
3152         if (unlikely(ret < 0))
3153                 return -EIO;
3154         *len = ret;
3155         return 0;
3156 }
3157
3158 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3159 {
3160         __be32 *p;
3161
3162         p = xdr_inline_decode(xdr, 8);
3163         if (unlikely(!p))
3164                 return -EIO;
3165         hdr->status = be32_to_cpup(p++);
3166         hdr->taglen = be32_to_cpup(p);
3167
3168         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3169         if (unlikely(!p))
3170                 return -EIO;
3171         hdr->tag = (char *)p;
3172         p += XDR_QUADLEN(hdr->taglen);
3173         hdr->nops = be32_to_cpup(p);
3174         if (unlikely(hdr->nops < 1))
3175                 return nfs4_stat_to_errno(hdr->status);
3176         return 0;
3177 }
3178
3179 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3180                 int *nfs_retval)
3181 {
3182         __be32 *p;
3183         uint32_t opnum;
3184         int32_t nfserr;
3185
3186         p = xdr_inline_decode(xdr, 8);
3187         if (unlikely(!p))
3188                 goto out_overflow;
3189         opnum = be32_to_cpup(p++);
3190         if (unlikely(opnum != expected))
3191                 goto out_bad_operation;
3192         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3193                 goto out_status;
3194         *nfs_retval = 0;
3195         return true;
3196 out_status:
3197         nfserr = be32_to_cpup(p);
3198         trace_nfs4_xdr_status(opnum, nfserr);
3199         *nfs_retval = nfs4_stat_to_errno(nfserr);
3200         return true;
3201 out_bad_operation:
3202         dprintk("nfs: Server returned operation"
3203                 " %d but we issued a request for %d\n",
3204                         opnum, expected);
3205         *nfs_retval = -EREMOTEIO;
3206         return false;
3207 out_overflow:
3208         *nfs_retval = -EIO;
3209         return false;
3210 }
3211
3212 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3213 {
3214         int retval;
3215
3216         __decode_op_hdr(xdr, expected, &retval);
3217         return retval;
3218 }
3219
3220 /* Dummy routine */
3221 static int decode_ace(struct xdr_stream *xdr, void *ace)
3222 {
3223         __be32 *p;
3224         unsigned int strlen;
3225         char *str;
3226
3227         p = xdr_inline_decode(xdr, 12);
3228         if (unlikely(!p))
3229                 return -EIO;
3230         return decode_opaque_inline(xdr, &strlen, &str);
3231 }
3232
3233 static ssize_t
3234 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3235 {
3236         ssize_t ret;
3237
3238         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3239         if (likely(ret >= 0))
3240                 return ret;
3241         if (ret != -EMSGSIZE)
3242                 return -EIO;
3243         return sz;
3244 }
3245
3246 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3247 {
3248         ssize_t ret;
3249         ret = decode_bitmap4(xdr, bitmap, 3);
3250         return ret < 0 ? ret : 0;
3251 }
3252
3253 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3254 {
3255         __be32 *p;
3256
3257         p = xdr_inline_decode(xdr, 4);
3258         if (unlikely(!p))
3259                 return -EIO;
3260         *attrlen = be32_to_cpup(p);
3261         *savep = xdr_stream_pos(xdr);
3262         return 0;
3263 }
3264
3265 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3266 {
3267         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3268                 int ret;
3269                 ret = decode_attr_bitmap(xdr, bitmask);
3270                 if (unlikely(ret < 0))
3271                         return ret;
3272                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3273         } else
3274                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3275         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3276                 bitmask[0], bitmask[1], bitmask[2]);
3277         return 0;
3278 }
3279
3280 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3281 {
3282         __be32 *p;
3283         int ret = 0;
3284
3285         *type = 0;
3286         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3287                 return -EIO;
3288         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3289                 p = xdr_inline_decode(xdr, 4);
3290                 if (unlikely(!p))
3291                         return -EIO;
3292                 *type = be32_to_cpup(p);
3293                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3294                         dprintk("%s: bad type %d\n", __func__, *type);
3295                         return -EIO;
3296                 }
3297                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3298                 ret = NFS_ATTR_FATTR_TYPE;
3299         }
3300         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3301         return ret;
3302 }
3303
3304 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3305                                       uint32_t *bitmap, uint32_t *type)
3306 {
3307         __be32 *p;
3308
3309         *type = 0;
3310         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3311                 return -EIO;
3312         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3313                 p = xdr_inline_decode(xdr, 4);
3314                 if (unlikely(!p))
3315                         return -EIO;
3316                 *type = be32_to_cpup(p);
3317                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3318         }
3319         dprintk("%s: expire type=0x%x\n", __func__, *type);
3320         return 0;
3321 }
3322
3323 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3324 {
3325         __be32 *p;
3326         int ret = 0;
3327
3328         *change = 0;
3329         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3330                 return -EIO;
3331         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3332                 p = xdr_inline_decode(xdr, 8);
3333                 if (unlikely(!p))
3334                         return -EIO;
3335                 xdr_decode_hyper(p, change);
3336                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3337                 ret = NFS_ATTR_FATTR_CHANGE;
3338         }
3339         dprintk("%s: change attribute=%Lu\n", __func__,
3340                         (unsigned long long)*change);
3341         return ret;
3342 }
3343
3344 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3345 {
3346         __be32 *p;
3347         int ret = 0;
3348
3349         *size = 0;
3350         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3351                 return -EIO;
3352         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3353                 p = xdr_inline_decode(xdr, 8);
3354                 if (unlikely(!p))
3355                         return -EIO;
3356                 xdr_decode_hyper(p, size);
3357                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3358                 ret = NFS_ATTR_FATTR_SIZE;
3359         }
3360         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3361         return ret;
3362 }
3363
3364 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3365 {
3366         __be32 *p;
3367
3368         *res = 0;
3369         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3370                 return -EIO;
3371         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3372                 p = xdr_inline_decode(xdr, 4);
3373                 if (unlikely(!p))
3374                         return -EIO;
3375                 *res = be32_to_cpup(p);
3376                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3377         }
3378         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3379         return 0;
3380 }
3381
3382 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3383 {
3384         __be32 *p;
3385
3386         *res = 0;
3387         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3388                 return -EIO;
3389         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3390                 p = xdr_inline_decode(xdr, 4);
3391                 if (unlikely(!p))
3392                         return -EIO;
3393                 *res = be32_to_cpup(p);
3394                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3395         }
3396         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3397         return 0;
3398 }
3399
3400 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3401 {
3402         __be32 *p;
3403         int ret = 0;
3404
3405         fsid->major = 0;
3406         fsid->minor = 0;
3407         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3408                 return -EIO;
3409         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3410                 p = xdr_inline_decode(xdr, 16);
3411                 if (unlikely(!p))
3412                         return -EIO;
3413                 p = xdr_decode_hyper(p, &fsid->major);
3414                 xdr_decode_hyper(p, &fsid->minor);
3415                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3416                 ret = NFS_ATTR_FATTR_FSID;
3417         }
3418         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3419                         (unsigned long long)fsid->major,
3420                         (unsigned long long)fsid->minor);
3421         return ret;
3422 }
3423
3424 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3425 {
3426         __be32 *p;
3427
3428         *res = 60;
3429         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3430                 return -EIO;
3431         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3432                 p = xdr_inline_decode(xdr, 4);
3433                 if (unlikely(!p))
3434                         return -EIO;
3435                 *res = be32_to_cpup(p);
3436                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3437         }
3438         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3439         return 0;
3440 }
3441
3442 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3443 {
3444         __be32 *p;
3445
3446         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3447                 return -EIO;
3448         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3449                 p = xdr_inline_decode(xdr, 4);
3450                 if (unlikely(!p))
3451                         return -EIO;
3452                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3453                 *res = -be32_to_cpup(p);
3454         }
3455         return 0;
3456 }
3457
3458 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3459                                  uint32_t *bitmap, uint32_t *bitmask)
3460 {
3461         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3462                 int ret;
3463                 ret = decode_attr_bitmap(xdr, bitmask);
3464                 if (unlikely(ret < 0))
3465                         return ret;
3466                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3467         } else
3468                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3469         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3470                 bitmask[0], bitmask[1], bitmask[2]);
3471         return 0;
3472 }
3473
3474 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3475 {
3476         __be32 *p;
3477         u32 len;
3478
3479         if (fh != NULL)
3480                 memset(fh, 0, sizeof(*fh));
3481
3482         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3483                 return -EIO;
3484         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3485                 p = xdr_inline_decode(xdr, 4);
3486                 if (unlikely(!p))
3487                         return -EIO;
3488                 len = be32_to_cpup(p);
3489                 if (len > NFS4_FHSIZE)
3490                         return -EIO;
3491                 p = xdr_inline_decode(xdr, len);
3492                 if (unlikely(!p))
3493                         return -EIO;
3494                 if (fh != NULL) {
3495                         memcpy(fh->data, p, len);
3496                         fh->size = len;
3497                 }
3498                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3499         }
3500         return 0;
3501 }
3502
3503 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3504 {
3505         __be32 *p;
3506
3507         *res = 0;
3508         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3509                 return -EIO;
3510         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3511                 p = xdr_inline_decode(xdr, 4);
3512                 if (unlikely(!p))
3513                         return -EIO;
3514                 *res = be32_to_cpup(p);
3515                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3516         }
3517         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3518         return 0;
3519 }
3520
3521 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3522 {
3523         __be32 *p;
3524         int ret = 0;
3525
3526         *fileid = 0;
3527         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3528                 return -EIO;
3529         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3530                 p = xdr_inline_decode(xdr, 8);
3531                 if (unlikely(!p))
3532                         return -EIO;
3533                 xdr_decode_hyper(p, fileid);
3534                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3535                 ret = NFS_ATTR_FATTR_FILEID;
3536         }
3537         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3538         return ret;
3539 }
3540
3541 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3542 {
3543         __be32 *p;
3544         int ret = 0;
3545
3546         *fileid = 0;
3547         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3548                 return -EIO;
3549         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3550                 p = xdr_inline_decode(xdr, 8);
3551                 if (unlikely(!p))
3552                         return -EIO;
3553                 xdr_decode_hyper(p, fileid);
3554                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3555                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3556         }
3557         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3558         return ret;
3559 }
3560
3561 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3562 {
3563         __be32 *p;
3564         int status = 0;
3565
3566         *res = 0;
3567         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3568                 return -EIO;
3569         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3570                 p = xdr_inline_decode(xdr, 8);
3571                 if (unlikely(!p))
3572                         return -EIO;
3573                 xdr_decode_hyper(p, res);
3574                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3575         }
3576         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3577         return status;
3578 }
3579
3580 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3581 {
3582         __be32 *p;
3583         int status = 0;
3584
3585         *res = 0;
3586         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3587                 return -EIO;
3588         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3589                 p = xdr_inline_decode(xdr, 8);
3590                 if (unlikely(!p))
3591                         return -EIO;
3592                 xdr_decode_hyper(p, res);
3593                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3594         }
3595         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3596         return status;
3597 }
3598
3599 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3600 {
3601         __be32 *p;
3602         int status = 0;
3603
3604         *res = 0;
3605         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3606                 return -EIO;
3607         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3608                 p = xdr_inline_decode(xdr, 8);
3609                 if (unlikely(!p))
3610                         return -EIO;
3611                 xdr_decode_hyper(p, res);
3612                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3613         }
3614         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3615         return status;
3616 }
3617
3618 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3619 {
3620         u32 n;
3621         __be32 *p;
3622         int status = 0;
3623
3624         p = xdr_inline_decode(xdr, 4);
3625         if (unlikely(!p))
3626                 return -EIO;
3627         n = be32_to_cpup(p);
3628         if (n == 0)
3629                 goto root_path;
3630         dprintk("pathname4: ");
3631         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3632                 dprintk("cannot parse %d components in path\n", n);
3633                 goto out_eio;
3634         }
3635         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3636                 struct nfs4_string *component = &path->components[path->ncomponents];
3637                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3638                 if (unlikely(status != 0))
3639                         goto out_eio;
3640                 ifdebug (XDR)
3641                         pr_cont("%s%.*s ",
3642                                 (path->ncomponents != n ? "/ " : ""),
3643                                 component->len, component->data);
3644         }
3645 out:
3646         return status;
3647 root_path:
3648 /* a root pathname is sent as a zero component4 */
3649         path->ncomponents = 1;
3650         path->components[0].len=0;
3651         path->components[0].data=NULL;
3652         dprintk("pathname4: /\n");
3653         goto out;
3654 out_eio:
3655         dprintk(" status %d", status);
3656         status = -EIO;
3657         goto out;
3658 }
3659
3660 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3661 {
3662         int n;
3663         __be32 *p;
3664         int status = -EIO;
3665
3666         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3667                 goto out;
3668         status = 0;
3669         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3670                 goto out;
3671         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3672         status = -EIO;
3673         /* Ignore borken servers that return unrequested attrs */
3674         if (unlikely(res == NULL))
3675                 goto out;
3676         dprintk("%s: fsroot:\n", __func__);
3677         status = decode_pathname(xdr, &res->fs_path);
3678         if (unlikely(status != 0))
3679                 goto out;
3680         p = xdr_inline_decode(xdr, 4);
3681         if (unlikely(!p))
3682                 goto out_eio;
3683         n = be32_to_cpup(p);
3684         if (n <= 0)
3685                 goto out_eio;
3686         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3687                 u32 m;
3688                 struct nfs4_fs_location *loc;
3689
3690                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3691                         break;
3692                 loc = &res->locations[res->nlocations];
3693                 p = xdr_inline_decode(xdr, 4);
3694                 if (unlikely(!p))
3695                         goto out_eio;
3696                 m = be32_to_cpup(p);
3697
3698                 dprintk("%s: servers:\n", __func__);
3699                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3700                         struct nfs4_string *server;
3701
3702                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3703                                 unsigned int i;
3704                                 dprintk("%s: using first %u of %u servers "
3705                                         "returned for location %u\n",
3706                                                 __func__,
3707                                                 NFS4_FS_LOCATION_MAXSERVERS,
3708                                                 m, res->nlocations);
3709                                 for (i = loc->nservers; i < m; i++) {
3710                                         unsigned int len;
3711                                         char *data;
3712                                         status = decode_opaque_inline(xdr, &len, &data);
3713                                         if (unlikely(status != 0))
3714                                                 goto out_eio;
3715                                 }
3716                                 break;
3717                         }
3718                         server = &loc->servers[loc->nservers];
3719                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3720                         if (unlikely(status != 0))
3721                                 goto out_eio;
3722                         dprintk("%s ", server->data);
3723                 }
3724                 status = decode_pathname(xdr, &loc->rootpath);
3725                 if (unlikely(status != 0))
3726                         goto out_eio;
3727         }
3728         if (res->nlocations != 0)
3729                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3730 out:
3731         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3732         return status;
3733 out_eio:
3734         status = -EIO;
3735         goto out;
3736 }
3737
3738 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3739 {
3740         __be32 *p;
3741         int status = 0;
3742
3743         *res = 0;
3744         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3745                 return -EIO;
3746         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3747                 p = xdr_inline_decode(xdr, 8);
3748                 if (unlikely(!p))
3749                         return -EIO;
3750                 xdr_decode_hyper(p, res);
3751                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3752         }
3753         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3754         return status;
3755 }
3756
3757 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3758 {
3759         __be32 *p;
3760         int status = 0;
3761
3762         *maxlink = 1;
3763         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3764                 return -EIO;
3765         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3766                 p = xdr_inline_decode(xdr, 4);
3767                 if (unlikely(!p))
3768                         return -EIO;
3769                 *maxlink = be32_to_cpup(p);
3770                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3771         }
3772         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3773         return status;
3774 }
3775
3776 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3777 {
3778         __be32 *p;
3779         int status = 0;
3780
3781         *maxname = 1024;
3782         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3783                 return -EIO;
3784         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3785                 p = xdr_inline_decode(xdr, 4);
3786                 if (unlikely(!p))
3787                         return -EIO;
3788                 *maxname = be32_to_cpup(p);
3789                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3790         }
3791         dprintk("%s: maxname=%u\n", __func__, *maxname);
3792         return status;
3793 }
3794
3795 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3796 {
3797         __be32 *p;
3798         int status = 0;
3799
3800         *res = 1024;
3801         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3802                 return -EIO;
3803         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3804                 uint64_t maxread;
3805                 p = xdr_inline_decode(xdr, 8);
3806                 if (unlikely(!p))
3807                         return -EIO;
3808                 xdr_decode_hyper(p, &maxread);
3809                 if (maxread > 0x7FFFFFFF)
3810                         maxread = 0x7FFFFFFF;
3811                 *res = (uint32_t)maxread;
3812                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3813         }
3814         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3815         return status;
3816 }
3817
3818 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3819 {
3820         __be32 *p;
3821         int status = 0;
3822
3823         *res = 1024;
3824         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3825                 return -EIO;
3826         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3827                 uint64_t maxwrite;
3828                 p = xdr_inline_decode(xdr, 8);
3829                 if (unlikely(!p))
3830                         return -EIO;
3831                 xdr_decode_hyper(p, &maxwrite);
3832                 if (maxwrite > 0x7FFFFFFF)
3833                         maxwrite = 0x7FFFFFFF;
3834                 *res = (uint32_t)maxwrite;
3835                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3836         }
3837         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3838         return status;
3839 }
3840
3841 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3842 {
3843         uint32_t tmp;
3844         __be32 *p;
3845         int ret = 0;
3846
3847         *mode = 0;
3848         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3849                 return -EIO;
3850         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3851                 p = xdr_inline_decode(xdr, 4);
3852                 if (unlikely(!p))
3853                         return -EIO;
3854                 tmp = be32_to_cpup(p);
3855                 *mode = tmp & ~S_IFMT;
3856                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3857                 ret = NFS_ATTR_FATTR_MODE;
3858         }
3859         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3860         return ret;
3861 }
3862
3863 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3864 {
3865         __be32 *p;
3866         int ret = 0;
3867
3868         *nlink = 1;
3869         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3870                 return -EIO;
3871         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3872                 p = xdr_inline_decode(xdr, 4);
3873                 if (unlikely(!p))
3874                         return -EIO;
3875                 *nlink = be32_to_cpup(p);
3876                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3877                 ret = NFS_ATTR_FATTR_NLINK;
3878         }
3879         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3880         return ret;
3881 }
3882
3883 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3884                 struct nfs4_string *name, gfp_t gfp_flags)
3885 {
3886         ssize_t ret;
3887
3888         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3889                         XDR_MAX_NETOBJ, gfp_flags);
3890         name->len = 0;
3891         if (ret > 0)
3892                 name->len = ret;
3893         return ret;
3894 }
3895
3896 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3897                 const struct nfs_server *server, kuid_t *uid,
3898                 struct nfs4_string *owner_name)
3899 {
3900         ssize_t len;
3901         char *p;
3902
3903         *uid = make_kuid(&init_user_ns, -2);
3904         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3905                 return -EIO;
3906         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3907                 return 0;
3908         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3909
3910         if (owner_name != NULL) {
3911                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3912                 if (len <= 0)
3913                         goto out;
3914                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3915                 return NFS_ATTR_FATTR_OWNER_NAME;
3916         } else {
3917                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3918                                 XDR_MAX_NETOBJ);
3919                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3920                         goto out;
3921                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3922                 return NFS_ATTR_FATTR_OWNER;
3923         }
3924 out:
3925         if (len == -EBADMSG)
3926                 return -EIO;
3927         return 0;
3928 }
3929
3930 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3931                 const struct nfs_server *server, kgid_t *gid,
3932                 struct nfs4_string *group_name)
3933 {
3934         ssize_t len;
3935         char *p;
3936
3937         *gid = make_kgid(&init_user_ns, -2);
3938         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3939                 return -EIO;
3940         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3941                 return 0;
3942         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3943
3944         if (group_name != NULL) {
3945                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3946                 if (len <= 0)
3947                         goto out;
3948                 dprintk("%s: name=%s\n", __func__, group_name->data);
3949                 return NFS_ATTR_FATTR_GROUP_NAME;
3950         } else {
3951                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3952                                 XDR_MAX_NETOBJ);
3953                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3954                         goto out;
3955                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3956                 return NFS_ATTR_FATTR_GROUP;
3957         }
3958 out:
3959         if (len == -EBADMSG)
3960                 return -EIO;
3961         return 0;
3962 }
3963
3964 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3965 {
3966         uint32_t major = 0, minor = 0;
3967         __be32 *p;
3968         int ret = 0;
3969
3970         *rdev = MKDEV(0,0);
3971         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3972                 return -EIO;
3973         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3974                 dev_t tmp;
3975
3976                 p = xdr_inline_decode(xdr, 8);
3977                 if (unlikely(!p))
3978                         return -EIO;
3979                 major = be32_to_cpup(p++);
3980                 minor = be32_to_cpup(p);
3981                 tmp = MKDEV(major, minor);
3982                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3983                         *rdev = tmp;
3984                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3985                 ret = NFS_ATTR_FATTR_RDEV;
3986         }
3987         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3988         return ret;
3989 }
3990
3991 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3992 {
3993         __be32 *p;
3994         int status = 0;
3995
3996         *res = 0;
3997         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3998                 return -EIO;
3999         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4000                 p = xdr_inline_decode(xdr, 8);
4001                 if (unlikely(!p))
4002                         return -EIO;
4003                 xdr_decode_hyper(p, res);
4004                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4005         }
4006         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4007         return status;
4008 }
4009
4010 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4011 {
4012         __be32 *p;
4013         int status = 0;
4014
4015         *res = 0;
4016         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4017                 return -EIO;
4018         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4019                 p = xdr_inline_decode(xdr, 8);
4020                 if (unlikely(!p))
4021                         return -EIO;
4022                 xdr_decode_hyper(p, res);
4023                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4024         }
4025         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4026         return status;
4027 }
4028
4029 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4030 {
4031         __be32 *p;
4032         int status = 0;
4033
4034         *res = 0;
4035         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4036                 return -EIO;
4037         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4038                 p = xdr_inline_decode(xdr, 8);
4039                 if (unlikely(!p))
4040                         return -EIO;
4041                 xdr_decode_hyper(p, res);
4042                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4043         }
4044         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4045         return status;
4046 }
4047
4048 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4049 {
4050         __be32 *p;
4051         int ret = 0;
4052
4053         *used = 0;
4054         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4055                 return -EIO;
4056         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4057                 p = xdr_inline_decode(xdr, 8);
4058                 if (unlikely(!p))
4059                         return -EIO;
4060                 xdr_decode_hyper(p, used);
4061                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4062                 ret = NFS_ATTR_FATTR_SPACE_USED;
4063         }
4064         dprintk("%s: space used=%Lu\n", __func__,
4065                         (unsigned long long)*used);
4066         return ret;
4067 }
4068
4069 static __be32 *
4070 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4071 {
4072         __u64 sec;
4073
4074         p = xdr_decode_hyper(p, &sec);
4075         t-> tv_sec = (time_t)sec;
4076         t->tv_nsec = be32_to_cpup(p++);
4077         return p;
4078 }
4079
4080 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4081 {
4082         __be32 *p;
4083
4084         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4085         if (unlikely(!p))
4086                 return -EIO;
4087         xdr_decode_nfstime4(p, time);
4088         return 0;
4089 }
4090
4091 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4092 {
4093         int status = 0;
4094
4095         time->tv_sec = 0;
4096         time->tv_nsec = 0;
4097         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4098                 return -EIO;
4099         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4100                 status = decode_attr_time(xdr, time);
4101                 if (status == 0)
4102                         status = NFS_ATTR_FATTR_ATIME;
4103                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4104         }
4105         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4106         return status;
4107 }
4108
4109 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4110 {
4111         int status = 0;
4112
4113         time->tv_sec = 0;
4114         time->tv_nsec = 0;
4115         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4116                 return -EIO;
4117         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4118                 status = decode_attr_time(xdr, time);
4119                 if (status == 0)
4120                         status = NFS_ATTR_FATTR_CTIME;
4121                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4122         }
4123         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4124         return status;
4125 }
4126
4127 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4128                                   struct timespec *time)
4129 {
4130         int status = 0;
4131
4132         time->tv_sec = 0;
4133         time->tv_nsec = 0;
4134         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4135                 return -EIO;
4136         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4137                 status = decode_attr_time(xdr, time);
4138                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4139         }
4140         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4141                 (long)time->tv_nsec);
4142         return status;
4143 }
4144
4145 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4146                                         struct nfs4_label *label)
4147 {
4148         uint32_t pi = 0;
4149         uint32_t lfs = 0;
4150         __u32 len;
4151         __be32 *p;
4152         int status = 0;
4153
4154         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4155                 return -EIO;
4156         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4157                 p = xdr_inline_decode(xdr, 4);
4158                 if (unlikely(!p))
4159                         return -EIO;
4160                 lfs = be32_to_cpup(p++);
4161                 p = xdr_inline_decode(xdr, 4);
4162                 if (unlikely(!p))
4163                         return -EIO;
4164                 pi = be32_to_cpup(p++);
4165                 p = xdr_inline_decode(xdr, 4);
4166                 if (unlikely(!p))
4167                         return -EIO;
4168                 len = be32_to_cpup(p++);
4169                 p = xdr_inline_decode(xdr, len);
4170                 if (unlikely(!p))
4171                         return -EIO;
4172                 if (len < NFS4_MAXLABELLEN) {
4173                         if (label) {
4174                                 memcpy(label->label, p, len);
4175                                 label->len = len;
4176                                 label->pi = pi;
4177                                 label->lfs = lfs;
4178                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4179                         }
4180                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4181                 } else
4182                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4183                                         __func__, len);
4184         }
4185         if (label && label->label)
4186                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4187                         (char *)label->label, label->len, label->pi, label->lfs);
4188         return status;
4189 }
4190
4191 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4192 {
4193         int status = 0;
4194
4195         time->tv_sec = 0;
4196         time->tv_nsec = 0;
4197         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4198                 return -EIO;
4199         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4200                 status = decode_attr_time(xdr, time);
4201                 if (status == 0)
4202                         status = NFS_ATTR_FATTR_MTIME;
4203                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4204         }
4205         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4206         return status;
4207 }
4208
4209 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4210 {
4211         unsigned int attrwords = XDR_QUADLEN(attrlen);
4212         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4213
4214         if (unlikely(attrwords != nwords)) {
4215                 dprintk("%s: server returned incorrect attribute length: "
4216                         "%u %c %u\n",
4217                                 __func__,
4218                                 attrwords << 2,
4219                                 (attrwords < nwords) ? '<' : '>',
4220                                 nwords << 2);
4221                 return -EIO;
4222         }
4223         return 0;
4224 }
4225
4226 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4227 {
4228         __be32 *p;
4229
4230         p = xdr_inline_decode(xdr, 20);
4231         if (unlikely(!p))
4232                 return -EIO;
4233         cinfo->atomic = be32_to_cpup(p++);
4234         p = xdr_decode_hyper(p, &cinfo->before);
4235         xdr_decode_hyper(p, &cinfo->after);
4236         return 0;
4237 }
4238
4239 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4240 {
4241         __be32 *p;
4242         uint32_t supp, acc;
4243         int status;
4244
4245         status = decode_op_hdr(xdr, OP_ACCESS);
4246         if (status)
4247                 return status;
4248         p = xdr_inline_decode(xdr, 8);
4249         if (unlikely(!p))
4250                 return -EIO;
4251         supp = be32_to_cpup(p++);
4252         acc = be32_to_cpup(p);
4253         *supported = supp;
4254         *access = acc;
4255         return 0;
4256 }
4257
4258 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4259 {
4260         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4261         if (unlikely(ret < 0))
4262                 return -EIO;
4263         return 0;
4264 }
4265
4266 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4267 {
4268         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4269 }
4270
4271 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4272 {
4273         stateid->type = NFS4_OPEN_STATEID_TYPE;
4274         return decode_stateid(xdr, stateid);
4275 }
4276
4277 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4278 {
4279         stateid->type = NFS4_LOCK_STATEID_TYPE;
4280         return decode_stateid(xdr, stateid);
4281 }
4282
4283 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4284 {
4285         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4286         return decode_stateid(xdr, stateid);
4287 }
4288
4289 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4290 {
4291         nfs4_stateid dummy;
4292
4293         nfs4_stateid_copy(stateid, &invalid_stateid);
4294         return decode_stateid(xdr, &dummy);
4295 }
4296
4297 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4298 {
4299         int status;
4300
4301         status = decode_op_hdr(xdr, OP_CLOSE);
4302         if (status != -EIO)
4303                 nfs_increment_open_seqid(status, res->seqid);
4304         if (!status)
4305                 status = decode_invalid_stateid(xdr, &res->stateid);
4306         return status;
4307 }
4308
4309 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4310 {
4311         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4312 }
4313
4314 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4315 {
4316         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4317 }
4318
4319 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4320 {
4321         int status;
4322
4323         status = decode_op_hdr(xdr, OP_COMMIT);
4324         if (!status)
4325                 status = decode_write_verifier(xdr, &res->verf->verifier);
4326         return status;
4327 }
4328
4329 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4330 {
4331         __be32 *p;
4332         uint32_t bmlen;
4333         int status;
4334
4335         status = decode_op_hdr(xdr, OP_CREATE);
4336         if (status)
4337                 return status;
4338         if ((status = decode_change_info(xdr, cinfo)))
4339                 return status;
4340         p = xdr_inline_decode(xdr, 4);
4341         if (unlikely(!p))
4342                 return -EIO;
4343         bmlen = be32_to_cpup(p);
4344         p = xdr_inline_decode(xdr, bmlen << 2);
4345         if (likely(p))
4346                 return 0;
4347         return -EIO;
4348 }
4349
4350 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4351 {
4352         unsigned int savep;
4353         uint32_t attrlen, bitmap[3] = {0};
4354         int status;
4355
4356         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4361                 goto xdr_error;
4362         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4365                                                  &res->fh_expire_type)) != 0)
4366                 goto xdr_error;
4367         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4368                 goto xdr_error;
4369         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4370                 goto xdr_error;
4371         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4372                 goto xdr_error;
4373         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4374                                 res->exclcreat_bitmask)) != 0)
4375                 goto xdr_error;
4376         status = verify_attr_len(xdr, savep, attrlen);
4377 xdr_error:
4378         dprintk("%s: xdr returned %d!\n", __func__, -status);
4379         return status;
4380 }
4381
4382 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4383 {
4384         unsigned int savep;
4385         uint32_t attrlen, bitmap[3] = {0};
4386         int status;
4387
4388         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4389                 goto xdr_error;
4390         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4393                 goto xdr_error;
4394
4395         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4400                 goto xdr_error;
4401
4402         status = -EIO;
4403         if (unlikely(bitmap[0]))
4404                 goto xdr_error;
4405
4406         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4407                 goto xdr_error;
4408         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4409                 goto xdr_error;
4410         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4411                 goto xdr_error;
4412
4413         status = verify_attr_len(xdr, savep, attrlen);
4414 xdr_error:
4415         dprintk("%s: xdr returned %d!\n", __func__, -status);
4416         return status;
4417 }
4418
4419 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4420 {
4421         unsigned int savep;
4422         uint32_t attrlen, bitmap[3] = {0};
4423         int status;
4424
4425         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4426                 goto xdr_error;
4427         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4428                 goto xdr_error;
4429         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4430                 goto xdr_error;
4431
4432         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4433                 goto xdr_error;
4434         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4435                 goto xdr_error;
4436
4437         status = verify_attr_len(xdr, savep, attrlen);
4438 xdr_error:
4439         dprintk("%s: xdr returned %d!\n", __func__, -status);
4440         return status;
4441 }
4442
4443 static int decode_threshold_hint(struct xdr_stream *xdr,
4444                                   uint32_t *bitmap,
4445                                   uint64_t *res,
4446                                   uint32_t hint_bit)
4447 {
4448         __be32 *p;
4449
4450         *res = 0;
4451         if (likely(bitmap[0] & hint_bit)) {
4452                 p = xdr_inline_decode(xdr, 8);
4453                 if (unlikely(!p))
4454                         return -EIO;
4455                 xdr_decode_hyper(p, res);
4456         }
4457         return 0;
4458 }
4459
4460 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4461                                         struct nfs4_threshold *res)
4462 {
4463         __be32 *p;
4464         unsigned int savep;
4465         uint32_t bitmap[3] = {0,}, attrlen;
4466         int status;
4467
4468         /* layout type */
4469         p = xdr_inline_decode(xdr, 4);
4470         if (unlikely(!p))
4471                 return -EIO;
4472         res->l_type = be32_to_cpup(p);
4473
4474         /* thi_hintset bitmap */
4475         status = decode_attr_bitmap(xdr, bitmap);
4476         if (status < 0)
4477                 goto xdr_error;
4478
4479         /* thi_hintlist length */
4480         status = decode_attr_length(xdr, &attrlen, &savep);
4481         if (status < 0)
4482                 goto xdr_error;
4483         /* thi_hintlist */
4484         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4485         if (status < 0)
4486                 goto xdr_error;
4487         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4488         if (status < 0)
4489                 goto xdr_error;
4490         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4491                                        THRESHOLD_RD_IO);
4492         if (status < 0)
4493                 goto xdr_error;
4494         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4495                                        THRESHOLD_WR_IO);
4496         if (status < 0)
4497                 goto xdr_error;
4498
4499         status = verify_attr_len(xdr, savep, attrlen);
4500         res->bm = bitmap[0];
4501
4502         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4503                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4504                 res->wr_io_sz);
4505 xdr_error:
4506         dprintk("%s ret=%d!\n", __func__, status);
4507         return status;
4508 }
4509
4510 /*
4511  * Thresholds on pNFS direct I/O vrs MDS I/O
4512  */
4513 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4514                                     uint32_t *bitmap,
4515                                     struct nfs4_threshold *res)
4516 {
4517         __be32 *p;
4518         int status = 0;
4519         uint32_t num;
4520
4521         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4522                 return -EIO;
4523         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4524                 /* Did the server return an unrequested attribute? */
4525                 if (unlikely(res == NULL))
4526                         return -EREMOTEIO;
4527                 p = xdr_inline_decode(xdr, 4);
4528                 if (unlikely(!p))
4529                         return -EIO;
4530                 num = be32_to_cpup(p);
4531                 if (num == 0)
4532                         return 0;
4533                 if (num > 1)
4534                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4535                                 "drivers per filesystem not supported\n",
4536                                 __func__);
4537
4538                 status = decode_first_threshold_item4(xdr, res);
4539                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4540         }
4541         return status;
4542 }
4543
4544 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4545                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4546                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4547                 const struct nfs_server *server)
4548 {
4549         int status;
4550         umode_t fmode = 0;
4551         uint32_t type;
4552         int32_t err;
4553
4554         status = decode_attr_type(xdr, bitmap, &type);
4555         if (status < 0)
4556                 goto xdr_error;
4557         fattr->mode = 0;
4558         if (status != 0) {
4559                 fattr->mode |= nfs_type2fmt[type];
4560                 fattr->valid |= status;
4561         }
4562
4563         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         status = decode_attr_size(xdr, bitmap, &fattr->size);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         err = 0;
4579         status = decode_attr_error(xdr, bitmap, &err);
4580         if (status < 0)
4581                 goto xdr_error;
4582
4583         status = decode_attr_filehandle(xdr, bitmap, fh);
4584         if (status < 0)
4585                 goto xdr_error;
4586
4587         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4588         if (status < 0)
4589                 goto xdr_error;
4590         fattr->valid |= status;
4591
4592         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4593         if (status < 0)
4594                 goto xdr_error;
4595         fattr->valid |= status;
4596
4597         status = -EIO;
4598         if (unlikely(bitmap[0]))
4599                 goto xdr_error;
4600
4601         status = decode_attr_mode(xdr, bitmap, &fmode);
4602         if (status < 0)
4603                 goto xdr_error;
4604         if (status != 0) {
4605                 fattr->mode |= fmode;
4606                 fattr->valid |= status;
4607         }
4608
4609         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4610         if (status < 0)
4611                 goto xdr_error;
4612         fattr->valid |= status;
4613
4614         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4615         if (status < 0)
4616                 goto xdr_error;
4617         fattr->valid |= status;
4618
4619         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4620         if (status < 0)
4621                 goto xdr_error;
4622         fattr->valid |= status;
4623
4624         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4625         if (status < 0)
4626                 goto xdr_error;
4627         fattr->valid |= status;
4628
4629         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4630         if (status < 0)
4631                 goto xdr_error;
4632         fattr->valid |= status;
4633
4634         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4640         if (status < 0)
4641                 goto xdr_error;
4642         fattr->valid |= status;
4643
4644         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4645         if (status < 0)
4646                 goto xdr_error;
4647         fattr->valid |= status;
4648
4649         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4650         if (status < 0)
4651                 goto xdr_error;
4652         fattr->valid |= status;
4653
4654         status = -EIO;
4655         if (unlikely(bitmap[1]))
4656                 goto xdr_error;
4657
4658         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4659         if (status < 0)
4660                 goto xdr_error;
4661
4662         if (label) {
4663                 status = decode_attr_security_label(xdr, bitmap, label);
4664                 if (status < 0)
4665                         goto xdr_error;
4666                 fattr->valid |= status;
4667         }
4668
4669 xdr_error:
4670         dprintk("%s: xdr returned %d\n", __func__, -status);
4671         return status;
4672 }
4673
4674 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4675                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4676                 struct nfs4_label *label, const struct nfs_server *server)
4677 {
4678         unsigned int savep;
4679         uint32_t attrlen,
4680                  bitmap[3] = {0};
4681         int status;
4682
4683         status = decode_op_hdr(xdr, OP_GETATTR);
4684         if (status < 0)
4685                 goto xdr_error;
4686
4687         status = decode_attr_bitmap(xdr, bitmap);
4688         if (status < 0)
4689                 goto xdr_error;
4690
4691         status = decode_attr_length(xdr, &attrlen, &savep);
4692         if (status < 0)
4693                 goto xdr_error;
4694
4695         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4696                                         label, server);
4697         if (status < 0)
4698                 goto xdr_error;
4699
4700         status = verify_attr_len(xdr, savep, attrlen);
4701 xdr_error:
4702         dprintk("%s: xdr returned %d\n", __func__, -status);
4703         return status;
4704 }
4705
4706 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4707                 struct nfs4_label *label, const struct nfs_server *server)
4708 {
4709         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4710 }
4711
4712 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4713                 const struct nfs_server *server)
4714 {
4715         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4716 }
4717
4718 /*
4719  * Decode potentially multiple layout types.
4720  */
4721 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4722                                     struct nfs_fsinfo *fsinfo)
4723 {
4724         __be32 *p;
4725         uint32_t i;
4726
4727         p = xdr_inline_decode(xdr, 4);
4728         if (unlikely(!p))
4729                 return -EIO;
4730         fsinfo->nlayouttypes = be32_to_cpup(p);
4731
4732         /* pNFS is not supported by the underlying file system */
4733         if (fsinfo->nlayouttypes == 0)
4734                 return 0;
4735
4736         /* Decode and set first layout type, move xdr->p past unused types */
4737         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4738         if (unlikely(!p))
4739                 return -EIO;
4740
4741         /* If we get too many, then just cap it at the max */
4742         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4743                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4744                         __func__, fsinfo->nlayouttypes);
4745                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4746         }
4747
4748         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4749                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4750         return 0;
4751 }
4752
4753 /*
4754  * The type of file system exported.
4755  * Note we must ensure that layouttype is set in any non-error case.
4756  */
4757 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4758                                 struct nfs_fsinfo *fsinfo)
4759 {
4760         int status = 0;
4761
4762         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4763         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4764                 return -EIO;
4765         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4766                 status = decode_pnfs_layout_types(xdr, fsinfo);
4767                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4768         }
4769         return status;
4770 }
4771
4772 /*
4773  * The prefered block size for layout directed io
4774  */
4775 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4776                                       uint32_t *res)
4777 {
4778         __be32 *p;
4779
4780         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4781         *res = 0;
4782         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4783                 p = xdr_inline_decode(xdr, 4);
4784                 if (unlikely(!p))
4785                         return -EIO;
4786                 *res = be32_to_cpup(p);
4787                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4788         }
4789         return 0;
4790 }
4791
4792 /*
4793  * The granularity of a CLONE operation.
4794  */
4795 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4796                                      uint32_t *res)
4797 {
4798         __be32 *p;
4799
4800         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4801         *res = 0;
4802         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4803                 p = xdr_inline_decode(xdr, 4);
4804                 if (unlikely(!p))
4805                         return -EIO;
4806                 *res = be32_to_cpup(p);
4807                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4808         }
4809         return 0;
4810 }
4811
4812 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4813 {
4814         unsigned int savep;
4815         uint32_t attrlen, bitmap[3];
4816         int status;
4817
4818         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4819                 goto xdr_error;
4820         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4821                 goto xdr_error;
4822         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4823                 goto xdr_error;
4824
4825         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4826
4827         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4828                 goto xdr_error;
4829         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4830                 goto xdr_error;
4831         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4832                 goto xdr_error;
4833         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4834         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4835                 goto xdr_error;
4836         fsinfo->wtpref = fsinfo->wtmax;
4837
4838         status = -EIO;
4839         if (unlikely(bitmap[0]))
4840                 goto xdr_error;
4841
4842         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4843         if (status != 0)
4844                 goto xdr_error;
4845         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4846         if (status != 0)
4847                 goto xdr_error;
4848
4849         status = -EIO;
4850         if (unlikely(bitmap[1]))
4851                 goto xdr_error;
4852
4853         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4854         if (status)
4855                 goto xdr_error;
4856         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4857         if (status)
4858                 goto xdr_error;
4859
4860         status = verify_attr_len(xdr, savep, attrlen);
4861 xdr_error:
4862         dprintk("%s: xdr returned %d!\n", __func__, -status);
4863         return status;
4864 }
4865
4866 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4867 {
4868         __be32 *p;
4869         uint32_t len;
4870         int status;
4871
4872         /* Zero handle first to allow comparisons */
4873         memset(fh, 0, sizeof(*fh));
4874
4875         status = decode_op_hdr(xdr, OP_GETFH);
4876         if (status)
4877                 return status;
4878
4879         p = xdr_inline_decode(xdr, 4);
4880         if (unlikely(!p))
4881                 return -EIO;
4882         len = be32_to_cpup(p);
4883         if (len > NFS4_FHSIZE)
4884                 return -EIO;
4885         fh->size = len;
4886         p = xdr_inline_decode(xdr, len);
4887         if (unlikely(!p))
4888                 return -EIO;
4889         memcpy(fh->data, p, len);
4890         return 0;
4891 }
4892
4893 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4894 {
4895         int status;
4896
4897         status = decode_op_hdr(xdr, OP_LINK);
4898         if (status)
4899                 return status;
4900         return decode_change_info(xdr, cinfo);
4901 }
4902
4903 /*
4904  * We create the owner, so we know a proper owner.id length is 4.
4905  */
4906 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4907 {
4908         uint64_t offset, length, clientid;
4909         __be32 *p;
4910         uint32_t namelen, type;
4911
4912         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4913         if (unlikely(!p))
4914                 return -EIO;
4915         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4916         p = xdr_decode_hyper(p, &length);
4917         type = be32_to_cpup(p++); /* 4 byte read */
4918         if (fl != NULL) { /* manipulate file lock */
4919                 fl->fl_start = (loff_t)offset;
4920                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4921                 if (length == ~(uint64_t)0)
4922                         fl->fl_end = OFFSET_MAX;
4923                 fl->fl_type = F_WRLCK;
4924                 if (type & 1)
4925                         fl->fl_type = F_RDLCK;
4926                 fl->fl_pid = 0;
4927         }
4928         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4929         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4930         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4931         if (likely(!p))
4932                 return -EIO;
4933         return -NFS4ERR_DENIED;
4934 }
4935
4936 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4937 {
4938         int status;
4939
4940         status = decode_op_hdr(xdr, OP_LOCK);
4941         if (status == -EIO)
4942                 goto out;
4943         if (status == 0) {
4944                 status = decode_lock_stateid(xdr, &res->stateid);
4945                 if (unlikely(status))
4946                         goto out;
4947         } else if (status == -NFS4ERR_DENIED)
4948                 status = decode_lock_denied(xdr, NULL);
4949         if (res->open_seqid != NULL)
4950                 nfs_increment_open_seqid(status, res->open_seqid);
4951         nfs_increment_lock_seqid(status, res->lock_seqid);
4952 out:
4953         return status;
4954 }
4955
4956 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4957 {
4958         int status;
4959         status = decode_op_hdr(xdr, OP_LOCKT);
4960         if (status == -NFS4ERR_DENIED)
4961                 return decode_lock_denied(xdr, res->denied);
4962         return status;
4963 }
4964
4965 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4966 {
4967         int status;
4968
4969         status = decode_op_hdr(xdr, OP_LOCKU);
4970         if (status != -EIO)
4971                 nfs_increment_lock_seqid(status, res->seqid);
4972         if (status == 0)
4973                 status = decode_lock_stateid(xdr, &res->stateid);
4974         return status;
4975 }
4976
4977 static int decode_release_lockowner(struct xdr_stream *xdr)
4978 {
4979         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4980 }
4981
4982 static int decode_lookup(struct xdr_stream *xdr)
4983 {
4984         return decode_op_hdr(xdr, OP_LOOKUP);
4985 }
4986
4987 static int decode_lookupp(struct xdr_stream *xdr)
4988 {
4989         return decode_op_hdr(xdr, OP_LOOKUPP);
4990 }
4991
4992 /* This is too sick! */
4993 static int decode_space_limit(struct xdr_stream *xdr,
4994                 unsigned long *pagemod_limit)
4995 {
4996         __be32 *p;
4997         uint32_t limit_type, nblocks, blocksize;
4998         u64 maxsize = 0;
4999
5000         p = xdr_inline_decode(xdr, 12);
5001         if (unlikely(!p))
5002                 return -EIO;
5003         limit_type = be32_to_cpup(p++);
5004         switch (limit_type) {
5005         case NFS4_LIMIT_SIZE:
5006                 xdr_decode_hyper(p, &maxsize);
5007                 break;
5008         case NFS4_LIMIT_BLOCKS:
5009                 nblocks = be32_to_cpup(p++);
5010                 blocksize = be32_to_cpup(p);
5011                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5012         }
5013         maxsize >>= PAGE_SHIFT;
5014         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5015         return 0;
5016 }
5017
5018 static int decode_rw_delegation(struct xdr_stream *xdr,
5019                 uint32_t delegation_type,
5020                 struct nfs_openres *res)
5021 {
5022         __be32 *p;
5023         int status;
5024
5025         status = decode_delegation_stateid(xdr, &res->delegation);
5026         if (unlikely(status))
5027                 return status;
5028         p = xdr_inline_decode(xdr, 4);
5029         if (unlikely(!p))
5030                 return -EIO;
5031         res->do_recall = be32_to_cpup(p);
5032
5033         switch (delegation_type) {
5034         case NFS4_OPEN_DELEGATE_READ:
5035                 res->delegation_type = FMODE_READ;
5036                 break;
5037         case NFS4_OPEN_DELEGATE_WRITE:
5038                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5039                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5040                                 return -EIO;
5041         }
5042         return decode_ace(xdr, NULL);
5043 }
5044
5045 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5046 {
5047         __be32 *p;
5048         uint32_t why_no_delegation;
5049
5050         p = xdr_inline_decode(xdr, 4);
5051         if (unlikely(!p))
5052                 return -EIO;
5053         why_no_delegation = be32_to_cpup(p);
5054         switch (why_no_delegation) {
5055                 case WND4_CONTENTION:
5056                 case WND4_RESOURCE:
5057                         xdr_inline_decode(xdr, 4);
5058                         /* Ignore for now */
5059         }
5060         return 0;
5061 }
5062
5063 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5064 {
5065         __be32 *p;
5066         uint32_t delegation_type;
5067
5068         p = xdr_inline_decode(xdr, 4);
5069         if (unlikely(!p))
5070                 return -EIO;
5071         delegation_type = be32_to_cpup(p);
5072         res->delegation_type = 0;
5073         switch (delegation_type) {
5074         case NFS4_OPEN_DELEGATE_NONE:
5075                 return 0;
5076         case NFS4_OPEN_DELEGATE_READ:
5077         case NFS4_OPEN_DELEGATE_WRITE:
5078                 return decode_rw_delegation(xdr, delegation_type, res);
5079         case NFS4_OPEN_DELEGATE_NONE_EXT:
5080                 return decode_no_delegation(xdr, res);
5081         }
5082         return -EIO;
5083 }
5084
5085 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5086 {
5087         __be32 *p;
5088         uint32_t savewords, bmlen, i;
5089         int status;
5090
5091         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5092                 return status;
5093         nfs_increment_open_seqid(status, res->seqid);
5094         if (status)
5095                 return status;
5096         status = decode_open_stateid(xdr, &res->stateid);
5097         if (unlikely(status))
5098                 return status;
5099
5100         decode_change_info(xdr, &res->cinfo);
5101
5102         p = xdr_inline_decode(xdr, 8);
5103         if (unlikely(!p))
5104                 return -EIO;
5105         res->rflags = be32_to_cpup(p++);
5106         bmlen = be32_to_cpup(p);
5107         if (bmlen > 10)
5108                 goto xdr_error;
5109
5110         p = xdr_inline_decode(xdr, bmlen << 2);
5111         if (unlikely(!p))
5112                 return -EIO;
5113         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5114         for (i = 0; i < savewords; ++i)
5115                 res->attrset[i] = be32_to_cpup(p++);
5116         for (; i < NFS4_BITMAP_SIZE; i++)
5117                 res->attrset[i] = 0;
5118
5119         return decode_delegation(xdr, res);
5120 xdr_error:
5121         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5122         return -EIO;
5123 }
5124
5125 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5126 {
5127         int status;
5128
5129         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5130         if (status != -EIO)
5131                 nfs_increment_open_seqid(status, res->seqid);
5132         if (!status)
5133                 status = decode_open_stateid(xdr, &res->stateid);
5134         return status;
5135 }
5136
5137 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5138 {
5139         int status;
5140
5141         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5142         if (status != -EIO)
5143                 nfs_increment_open_seqid(status, res->seqid);
5144         if (!status)
5145                 status = decode_open_stateid(xdr, &res->stateid);
5146         return status;
5147 }
5148
5149 static int decode_putfh(struct xdr_stream *xdr)
5150 {
5151         return decode_op_hdr(xdr, OP_PUTFH);
5152 }
5153
5154 static int decode_putrootfh(struct xdr_stream *xdr)
5155 {
5156         return decode_op_hdr(xdr, OP_PUTROOTFH);
5157 }
5158
5159 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5160                        struct nfs_pgio_res *res)
5161 {
5162         __be32 *p;
5163         uint32_t count, eof, recvd;
5164         int status;
5165
5166         status = decode_op_hdr(xdr, OP_READ);
5167         if (status)
5168                 return status;
5169         p = xdr_inline_decode(xdr, 8);
5170         if (unlikely(!p))
5171                 return -EIO;
5172         eof = be32_to_cpup(p++);
5173         count = be32_to_cpup(p);
5174         recvd = xdr_read_pages(xdr, count);
5175         if (count > recvd) {
5176                 dprintk("NFS: server cheating in read reply: "
5177                                 "count %u > recvd %u\n", count, recvd);
5178                 count = recvd;
5179                 eof = 0;
5180         }
5181         res->eof = eof;
5182         res->count = count;
5183         return 0;
5184 }
5185
5186 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5187 {
5188         int             status;
5189         __be32          verf[2];
5190
5191         status = decode_op_hdr(xdr, OP_READDIR);
5192         if (!status)
5193                 status = decode_verifier(xdr, readdir->verifier.data);
5194         if (unlikely(status))
5195                 return status;
5196         memcpy(verf, readdir->verifier.data, sizeof(verf));
5197         dprintk("%s: verifier = %08x:%08x\n",
5198                         __func__, verf[0], verf[1]);
5199         return xdr_read_pages(xdr, xdr->buf->page_len);
5200 }
5201
5202 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5203 {
5204         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5205         u32 len, recvd;
5206         __be32 *p;
5207         int status;
5208
5209         status = decode_op_hdr(xdr, OP_READLINK);
5210         if (status)
5211                 return status;
5212
5213         /* Convert length of symlink */
5214         p = xdr_inline_decode(xdr, 4);
5215         if (unlikely(!p))
5216                 return -EIO;
5217         len = be32_to_cpup(p);
5218         if (len >= rcvbuf->page_len || len <= 0) {
5219                 dprintk("nfs: server returned giant symlink!\n");
5220                 return -ENAMETOOLONG;
5221         }
5222         recvd = xdr_read_pages(xdr, len);
5223         if (recvd < len) {
5224                 dprintk("NFS: server cheating in readlink reply: "
5225                                 "count %u > recvd %u\n", len, recvd);
5226                 return -EIO;
5227         }
5228         /*
5229          * The XDR encode routine has set things up so that
5230          * the link text will be copied directly into the
5231          * buffer.  We just have to do overflow-checking,
5232          * and and null-terminate the text (the VFS expects
5233          * null-termination).
5234          */
5235         xdr_terminate_string(rcvbuf, len);
5236         return 0;
5237 }
5238
5239 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5240 {
5241         int status;
5242
5243         status = decode_op_hdr(xdr, OP_REMOVE);
5244         if (status)
5245                 goto out;
5246         status = decode_change_info(xdr, cinfo);
5247 out:
5248         return status;
5249 }
5250
5251 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5252               struct nfs4_change_info *new_cinfo)
5253 {
5254         int status;
5255
5256         status = decode_op_hdr(xdr, OP_RENAME);
5257         if (status)
5258                 goto out;
5259         if ((status = decode_change_info(xdr, old_cinfo)))
5260                 goto out;
5261         status = decode_change_info(xdr, new_cinfo);
5262 out:
5263         return status;
5264 }
5265
5266 static int decode_renew(struct xdr_stream *xdr)
5267 {
5268         return decode_op_hdr(xdr, OP_RENEW);
5269 }
5270
5271 static int
5272 decode_restorefh(struct xdr_stream *xdr)
5273 {
5274         return decode_op_hdr(xdr, OP_RESTOREFH);
5275 }
5276
5277 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5278                          struct nfs_getaclres *res)
5279 {
5280         unsigned int savep;
5281         uint32_t attrlen,
5282                  bitmap[3] = {0};
5283         int status;
5284         unsigned int pg_offset;
5285
5286         res->acl_len = 0;
5287         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5288                 goto out;
5289
5290         xdr_enter_page(xdr, xdr->buf->page_len);
5291
5292         /* Calculate the offset of the page data */
5293         pg_offset = xdr->buf->head[0].iov_len;
5294
5295         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5296                 goto out;
5297         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5298                 goto out;
5299
5300         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5301                 return -EIO;
5302         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5303
5304                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5305                  * are stored with the acl data to handle the problem of
5306                  * variable length bitmaps.*/
5307                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5308                 res->acl_len = attrlen;
5309
5310                 /* Check for receive buffer overflow */
5311                 if (res->acl_len > (xdr->nwords << 2) ||
5312                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5313                         res->acl_flags |= NFS4_ACL_TRUNC;
5314                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5315                                         attrlen, xdr->nwords << 2);
5316                 }
5317         } else
5318                 status = -EOPNOTSUPP;
5319
5320 out:
5321         return status;
5322 }
5323
5324 static int
5325 decode_savefh(struct xdr_stream *xdr)
5326 {
5327         return decode_op_hdr(xdr, OP_SAVEFH);
5328 }
5329
5330 static int decode_setattr(struct xdr_stream *xdr)
5331 {
5332         int status;
5333
5334         status = decode_op_hdr(xdr, OP_SETATTR);
5335         if (status)
5336                 return status;
5337         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5338                 return 0;
5339         return -EIO;
5340 }
5341
5342 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5343 {
5344         __be32 *p;
5345         uint32_t opnum;
5346         int32_t nfserr;
5347
5348         p = xdr_inline_decode(xdr, 8);
5349         if (unlikely(!p))
5350                 return -EIO;
5351         opnum = be32_to_cpup(p++);
5352         if (opnum != OP_SETCLIENTID) {
5353                 dprintk("nfs: decode_setclientid: Server returned operation"
5354                         " %d\n", opnum);
5355                 return -EIO;
5356         }
5357         nfserr = be32_to_cpup(p);
5358         if (nfserr == NFS_OK) {
5359                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5360                 if (unlikely(!p))
5361                         return -EIO;
5362                 p = xdr_decode_hyper(p, &res->clientid);
5363                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5364         } else if (nfserr == NFSERR_CLID_INUSE) {
5365                 uint32_t len;
5366
5367                 /* skip netid string */
5368                 p = xdr_inline_decode(xdr, 4);
5369                 if (unlikely(!p))
5370                         return -EIO;
5371                 len = be32_to_cpup(p);
5372                 p = xdr_inline_decode(xdr, len);
5373                 if (unlikely(!p))
5374                         return -EIO;
5375
5376                 /* skip uaddr string */
5377                 p = xdr_inline_decode(xdr, 4);
5378                 if (unlikely(!p))
5379                         return -EIO;
5380                 len = be32_to_cpup(p);
5381                 p = xdr_inline_decode(xdr, len);
5382                 if (unlikely(!p))
5383                         return -EIO;
5384                 return -NFSERR_CLID_INUSE;
5385         } else
5386                 return nfs4_stat_to_errno(nfserr);
5387
5388         return 0;
5389 }
5390
5391 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5392 {
5393         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5394 }
5395
5396 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5397 {
5398         __be32 *p;
5399         int status;
5400
5401         status = decode_op_hdr(xdr, OP_WRITE);
5402         if (status)
5403                 return status;
5404
5405         p = xdr_inline_decode(xdr, 8);
5406         if (unlikely(!p))
5407                 return -EIO;
5408         res->count = be32_to_cpup(p++);
5409         res->verf->committed = be32_to_cpup(p++);
5410         return decode_write_verifier(xdr, &res->verf->verifier);
5411 }
5412
5413 static int decode_delegreturn(struct xdr_stream *xdr)
5414 {
5415         return decode_op_hdr(xdr, OP_DELEGRETURN);
5416 }
5417
5418 static int decode_secinfo_gss(struct xdr_stream *xdr,
5419                               struct nfs4_secinfo4 *flavor)
5420 {
5421         u32 oid_len;
5422         __be32 *p;
5423
5424         p = xdr_inline_decode(xdr, 4);
5425         if (unlikely(!p))
5426                 return -EIO;
5427         oid_len = be32_to_cpup(p);
5428         if (oid_len > GSS_OID_MAX_LEN)
5429                 return -EINVAL;
5430
5431         p = xdr_inline_decode(xdr, oid_len);
5432         if (unlikely(!p))
5433                 return -EIO;
5434         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5435         flavor->flavor_info.oid.len = oid_len;
5436
5437         p = xdr_inline_decode(xdr, 8);
5438         if (unlikely(!p))
5439                 return -EIO;
5440         flavor->flavor_info.qop = be32_to_cpup(p++);
5441         flavor->flavor_info.service = be32_to_cpup(p);
5442
5443         return 0;
5444 }
5445
5446 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5447 {
5448         struct nfs4_secinfo4 *sec_flavor;
5449         unsigned int i, num_flavors;
5450         int status;
5451         __be32 *p;
5452
5453         p = xdr_inline_decode(xdr, 4);
5454         if (unlikely(!p))
5455                 return -EIO;
5456
5457         res->flavors->num_flavors = 0;
5458         num_flavors = be32_to_cpup(p);
5459
5460         for (i = 0; i < num_flavors; i++) {
5461                 sec_flavor = &res->flavors->flavors[i];
5462                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5463                         break;
5464
5465                 p = xdr_inline_decode(xdr, 4);
5466                 if (unlikely(!p))
5467                         return -EIO;
5468                 sec_flavor->flavor = be32_to_cpup(p);
5469
5470                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5471                         status = decode_secinfo_gss(xdr, sec_flavor);
5472                         if (status)
5473                                 goto out;
5474                 }
5475                 res->flavors->num_flavors++;
5476         }
5477
5478         status = 0;
5479 out:
5480         return status;
5481 }
5482
5483 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5484 {
5485         int status = decode_op_hdr(xdr, OP_SECINFO);
5486         if (status)
5487                 return status;
5488         return decode_secinfo_common(xdr, res);
5489 }
5490
5491 #if defined(CONFIG_NFS_V4_1)
5492 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5493 {
5494         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5495         if (status)
5496                 return status;
5497         return decode_secinfo_common(xdr, res);
5498 }
5499
5500 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5501 {
5502         __be32 *p;
5503         uint32_t bitmap_words;
5504         unsigned int i;
5505
5506         p = xdr_inline_decode(xdr, 4);
5507         if (!p)
5508                 return -EIO;
5509         bitmap_words = be32_to_cpup(p++);
5510         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5511                 return -EIO;
5512         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5513         for (i = 0; i < bitmap_words; i++)
5514                 op_map->u.words[i] = be32_to_cpup(p++);
5515
5516         return 0;
5517 }
5518
5519 static int decode_exchange_id(struct xdr_stream *xdr,
5520                               struct nfs41_exchange_id_res *res)
5521 {
5522         __be32 *p;
5523         uint32_t dummy;
5524         char *dummy_str;
5525         int status;
5526         uint32_t impl_id_count;
5527
5528         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5529         if (status)
5530                 return status;
5531
5532         p = xdr_inline_decode(xdr, 8);
5533         if (unlikely(!p))
5534                 return -EIO;
5535         xdr_decode_hyper(p, &res->clientid);
5536         p = xdr_inline_decode(xdr, 12);
5537         if (unlikely(!p))
5538                 return -EIO;
5539         res->seqid = be32_to_cpup(p++);
5540         res->flags = be32_to_cpup(p++);
5541
5542         res->state_protect.how = be32_to_cpup(p);
5543         switch (res->state_protect.how) {
5544         case SP4_NONE:
5545                 break;
5546         case SP4_MACH_CRED:
5547                 status = decode_op_map(xdr, &res->state_protect.enforce);
5548                 if (status)
5549                         return status;
5550                 status = decode_op_map(xdr, &res->state_protect.allow);
5551                 if (status)
5552                         return status;
5553                 break;
5554         default:
5555                 WARN_ON_ONCE(1);
5556                 return -EIO;
5557         }
5558
5559         /* server_owner4.so_minor_id */
5560         p = xdr_inline_decode(xdr, 8);
5561         if (unlikely(!p))
5562                 return -EIO;
5563         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5564
5565         /* server_owner4.so_major_id */
5566         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5567         if (unlikely(status))
5568                 return status;
5569         memcpy(res->server_owner->major_id, dummy_str, dummy);
5570         res->server_owner->major_id_sz = dummy;
5571
5572         /* server_scope4 */
5573         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5574         if (unlikely(status))
5575                 return status;
5576         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5577         res->server_scope->server_scope_sz = dummy;
5578
5579         /* Implementation Id */
5580         p = xdr_inline_decode(xdr, 4);
5581         if (unlikely(!p))
5582                 return -EIO;
5583         impl_id_count = be32_to_cpup(p++);
5584
5585         if (impl_id_count) {
5586                 /* nii_domain */
5587                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5588                 if (unlikely(status))
5589                         return status;
5590                 memcpy(res->impl_id->domain, dummy_str, dummy);
5591
5592                 /* nii_name */
5593                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5594                 if (unlikely(status))
5595                         return status;
5596                 memcpy(res->impl_id->name, dummy_str, dummy);
5597
5598                 /* nii_date */
5599                 p = xdr_inline_decode(xdr, 12);
5600                 if (unlikely(!p))
5601                         return -EIO;
5602                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5603                 res->impl_id->date.nseconds = be32_to_cpup(p);
5604
5605                 /* if there's more than one entry, ignore the rest */
5606         }
5607         return 0;
5608 }
5609
5610 static int decode_chan_attrs(struct xdr_stream *xdr,
5611                              struct nfs4_channel_attrs *attrs)
5612 {
5613         __be32 *p;
5614         u32 nr_attrs, val;
5615
5616         p = xdr_inline_decode(xdr, 28);
5617         if (unlikely(!p))
5618                 return -EIO;
5619         val = be32_to_cpup(p++);        /* headerpadsz */
5620         if (val)
5621                 return -EINVAL;         /* no support for header padding yet */
5622         attrs->max_rqst_sz = be32_to_cpup(p++);
5623         attrs->max_resp_sz = be32_to_cpup(p++);
5624         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5625         attrs->max_ops = be32_to_cpup(p++);
5626         attrs->max_reqs = be32_to_cpup(p++);
5627         nr_attrs = be32_to_cpup(p);
5628         if (unlikely(nr_attrs > 1)) {
5629                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5630                         "count %u\n", __func__, nr_attrs);
5631                 return -EINVAL;
5632         }
5633         if (nr_attrs == 1) {
5634                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5635                 if (unlikely(!p))
5636                         return -EIO;
5637         }
5638         return 0;
5639 }
5640
5641 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5642 {
5643         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5644 }
5645
5646 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5647                                 struct nfs41_bind_conn_to_session_res *res)
5648 {
5649         __be32 *p;
5650         int status;
5651
5652         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5653         if (!status)
5654                 status = decode_sessionid(xdr, &res->sessionid);
5655         if (unlikely(status))
5656                 return status;
5657
5658         /* dir flags, rdma mode bool */
5659         p = xdr_inline_decode(xdr, 8);
5660         if (unlikely(!p))
5661                 return -EIO;
5662
5663         res->dir = be32_to_cpup(p++);
5664         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5665                 return -EIO;
5666         if (be32_to_cpup(p) == 0)
5667                 res->use_conn_in_rdma_mode = false;
5668         else
5669                 res->use_conn_in_rdma_mode = true;
5670
5671         return 0;
5672 }
5673
5674 static int decode_create_session(struct xdr_stream *xdr,
5675                                  struct nfs41_create_session_res *res)
5676 {
5677         __be32 *p;
5678         int status;
5679
5680         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5681         if (!status)
5682                 status = decode_sessionid(xdr, &res->sessionid);
5683         if (unlikely(status))
5684                 return status;
5685
5686         /* seqid, flags */
5687         p = xdr_inline_decode(xdr, 8);
5688         if (unlikely(!p))
5689                 return -EIO;
5690         res->seqid = be32_to_cpup(p++);
5691         res->flags = be32_to_cpup(p);
5692
5693         /* Channel attributes */
5694         status = decode_chan_attrs(xdr, &res->fc_attrs);
5695         if (!status)
5696                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5697         return status;
5698 }
5699
5700 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5701 {
5702         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5703 }
5704
5705 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5706 {
5707         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5708 }
5709
5710 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5711 {
5712         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5713 }
5714 #endif /* CONFIG_NFS_V4_1 */
5715
5716 static int decode_sequence(struct xdr_stream *xdr,
5717                            struct nfs4_sequence_res *res,
5718                            struct rpc_rqst *rqstp)
5719 {
5720 #if defined(CONFIG_NFS_V4_1)
5721         struct nfs4_session *session;
5722         struct nfs4_sessionid id;
5723         u32 dummy;
5724         int status;
5725         __be32 *p;
5726
5727         if (res->sr_slot == NULL)
5728                 return 0;
5729         if (!res->sr_slot->table->session)
5730                 return 0;
5731
5732         status = decode_op_hdr(xdr, OP_SEQUENCE);
5733         if (!status)
5734                 status = decode_sessionid(xdr, &id);
5735         if (unlikely(status))
5736                 goto out_err;
5737
5738         /*
5739          * If the server returns different values for sessionID, slotID or
5740          * sequence number, the server is looney tunes.
5741          */
5742         status = -EREMOTEIO;
5743         session = res->sr_slot->table->session;
5744
5745         if (memcmp(id.data, session->sess_id.data,
5746                    NFS4_MAX_SESSIONID_LEN)) {
5747                 dprintk("%s Invalid session id\n", __func__);
5748                 goto out_err;
5749         }
5750
5751         p = xdr_inline_decode(xdr, 20);
5752         if (unlikely(!p))
5753                 goto out_overflow;
5754
5755         /* seqid */
5756         dummy = be32_to_cpup(p++);
5757         if (dummy != res->sr_slot->seq_nr) {
5758                 dprintk("%s Invalid sequence number\n", __func__);
5759                 goto out_err;
5760         }
5761         /* slot id */
5762         dummy = be32_to_cpup(p++);
5763         if (dummy != res->sr_slot->slot_nr) {
5764                 dprintk("%s Invalid slot id\n", __func__);
5765                 goto out_err;
5766         }
5767         /* highest slot id */
5768         res->sr_highest_slotid = be32_to_cpup(p++);
5769         /* target highest slot id */
5770         res->sr_target_highest_slotid = be32_to_cpup(p++);
5771         /* result flags */
5772         res->sr_status_flags = be32_to_cpup(p);
5773         status = 0;
5774 out_err:
5775         res->sr_status = status;
5776         return status;
5777 out_overflow:
5778         status = -EIO;
5779         goto out_err;
5780 #else  /* CONFIG_NFS_V4_1 */
5781         return 0;
5782 #endif /* CONFIG_NFS_V4_1 */
5783 }
5784
5785 #if defined(CONFIG_NFS_V4_1)
5786 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5787 {
5788         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5789         return decode_stateid(xdr, stateid);
5790 }
5791
5792 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5793                                 struct nfs4_getdeviceinfo_res *res)
5794 {
5795         struct pnfs_device *pdev = res->pdev;
5796         __be32 *p;
5797         uint32_t len, type;
5798         int status;
5799
5800         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5801         if (status) {
5802                 if (status == -ETOOSMALL) {
5803                         p = xdr_inline_decode(xdr, 4);
5804                         if (unlikely(!p))
5805                                 return -EIO;
5806                         pdev->mincount = be32_to_cpup(p);
5807                         dprintk("%s: Min count too small. mincnt = %u\n",
5808                                 __func__, pdev->mincount);
5809                 }
5810                 return status;
5811         }
5812
5813         p = xdr_inline_decode(xdr, 8);
5814         if (unlikely(!p))
5815                 return -EIO;
5816         type = be32_to_cpup(p++);
5817         if (type != pdev->layout_type) {
5818                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5819                         __func__, pdev->layout_type, type);
5820                 return -EINVAL;
5821         }
5822         /*
5823          * Get the length of the opaque device_addr4. xdr_read_pages places
5824          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5825          * and places the remaining xdr data in xdr_buf->tail
5826          */
5827         pdev->mincount = be32_to_cpup(p);
5828         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5829                 return -EIO;
5830
5831         /* Parse notification bitmap, verifying that it is zero. */
5832         p = xdr_inline_decode(xdr, 4);
5833         if (unlikely(!p))
5834                 return -EIO;
5835         len = be32_to_cpup(p);
5836         if (len) {
5837                 uint32_t i;
5838
5839                 p = xdr_inline_decode(xdr, 4 * len);
5840                 if (unlikely(!p))
5841                         return -EIO;
5842
5843                 res->notification = be32_to_cpup(p++);
5844                 for (i = 1; i < len; i++) {
5845                         if (be32_to_cpup(p++)) {
5846                                 dprintk("%s: unsupported notification\n",
5847                                         __func__);
5848                                 return -EIO;
5849                         }
5850                 }
5851         }
5852         return 0;
5853 }
5854
5855 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5856                             struct nfs4_layoutget_res *res)
5857 {
5858         __be32 *p;
5859         int status;
5860         u32 layout_count;
5861         u32 recvd;
5862
5863         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5864         if (status)
5865                 goto out;
5866         p = xdr_inline_decode(xdr, 4);
5867         if (unlikely(!p))
5868                 goto out_overflow;
5869         res->return_on_close = be32_to_cpup(p);
5870         decode_layout_stateid(xdr, &res->stateid);
5871         p = xdr_inline_decode(xdr, 4);
5872         if (unlikely(!p))
5873                 goto out_overflow;
5874         layout_count = be32_to_cpup(p);
5875         if (!layout_count) {
5876                 dprintk("%s: server responded with empty layout array\n",
5877                         __func__);
5878                 status = -EINVAL;
5879                 goto out;
5880         }
5881
5882         p = xdr_inline_decode(xdr, 28);
5883         if (unlikely(!p))
5884                 goto out_overflow;
5885         p = xdr_decode_hyper(p, &res->range.offset);
5886         p = xdr_decode_hyper(p, &res->range.length);
5887         res->range.iomode = be32_to_cpup(p++);
5888         res->type = be32_to_cpup(p++);
5889         res->layoutp->len = be32_to_cpup(p);
5890
5891         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5892                 __func__,
5893                 (unsigned long)res->range.offset,
5894                 (unsigned long)res->range.length,
5895                 res->range.iomode,
5896                 res->type,
5897                 res->layoutp->len);
5898
5899         recvd = xdr_read_pages(xdr, res->layoutp->len);
5900         if (res->layoutp->len > recvd) {
5901                 dprintk("NFS: server cheating in layoutget reply: "
5902                                 "layout len %u > recvd %u\n",
5903                                 res->layoutp->len, recvd);
5904                 status = -EINVAL;
5905                 goto out;
5906         }
5907
5908         if (layout_count > 1) {
5909                 /* We only handle a length one array at the moment.  Any
5910                  * further entries are just ignored.  Note that this means
5911                  * the client may see a response that is less than the
5912                  * minimum it requested.
5913                  */
5914                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5915                         __func__, layout_count);
5916         }
5917
5918 out:
5919         res->status = status;
5920         return status;
5921 out_overflow:
5922         status = -EIO;
5923         goto out;
5924 }
5925
5926 static int decode_layoutreturn(struct xdr_stream *xdr,
5927                                struct nfs4_layoutreturn_res *res)
5928 {
5929         __be32 *p;
5930         int status;
5931
5932         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5933         if (status)
5934                 return status;
5935         p = xdr_inline_decode(xdr, 4);
5936         if (unlikely(!p))
5937                 return -EIO;
5938         res->lrs_present = be32_to_cpup(p);
5939         if (res->lrs_present)
5940                 status = decode_layout_stateid(xdr, &res->stateid);
5941         else
5942                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5943         return status;
5944 }
5945
5946 static int decode_layoutcommit(struct xdr_stream *xdr,
5947                                struct rpc_rqst *req,
5948                                struct nfs4_layoutcommit_res *res)
5949 {
5950         __be32 *p;
5951         __u32 sizechanged;
5952         int status;
5953
5954         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5955         res->status = status;
5956         if (status)
5957                 return status;
5958
5959         p = xdr_inline_decode(xdr, 4);
5960         if (unlikely(!p))
5961                 return -EIO;
5962         sizechanged = be32_to_cpup(p);
5963
5964         if (sizechanged) {
5965                 /* throw away new size */
5966                 p = xdr_inline_decode(xdr, 8);
5967                 if (unlikely(!p))
5968                         return -EIO;
5969         }
5970         return 0;
5971 }
5972
5973 static int decode_test_stateid(struct xdr_stream *xdr,
5974                                struct nfs41_test_stateid_res *res)
5975 {
5976         __be32 *p;
5977         int status;
5978         int num_res;
5979
5980         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5981         if (status)
5982                 return status;
5983
5984         p = xdr_inline_decode(xdr, 4);
5985         if (unlikely(!p))
5986                 return -EIO;
5987         num_res = be32_to_cpup(p++);
5988         if (num_res != 1)
5989                 return -EIO;
5990
5991         p = xdr_inline_decode(xdr, 4);
5992         if (unlikely(!p))
5993                 return -EIO;
5994         res->status = be32_to_cpup(p++);
5995
5996         return status;
5997 }
5998
5999 static int decode_free_stateid(struct xdr_stream *xdr,
6000                                struct nfs41_free_stateid_res *res)
6001 {
6002         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6003         return res->status;
6004 }
6005 #else
6006 static inline
6007 int decode_layoutreturn(struct xdr_stream *xdr,
6008                                struct nfs4_layoutreturn_res *res)
6009 {
6010         return 0;
6011 }
6012
6013 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6014                             struct nfs4_layoutget_res *res)
6015 {
6016         return 0;
6017 }
6018
6019 #endif /* CONFIG_NFS_V4_1 */
6020
6021 /*
6022  * END OF "GENERIC" DECODE ROUTINES.
6023  */
6024
6025 /*
6026  * Decode OPEN_DOWNGRADE response
6027  */
6028 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6029                                        struct xdr_stream *xdr,
6030                                        void *data)
6031 {
6032         struct nfs_closeres *res = data;
6033         struct compound_hdr hdr;
6034         int status;
6035
6036         status = decode_compound_hdr(xdr, &hdr);
6037         if (status)
6038                 goto out;
6039         status = decode_sequence(xdr, &res->seq_res, rqstp);
6040         if (status)
6041                 goto out;
6042         status = decode_putfh(xdr);
6043         if (status)
6044                 goto out;
6045         if (res->lr_res) {
6046                 status = decode_layoutreturn(xdr, res->lr_res);
6047                 res->lr_ret = status;
6048                 if (status)
6049                         goto out;
6050         }
6051         status = decode_open_downgrade(xdr, res);
6052 out:
6053         return status;
6054 }
6055
6056 /*
6057  * Decode ACCESS response
6058  */
6059 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6060                                void *data)
6061 {
6062         struct nfs4_accessres *res = data;
6063         struct compound_hdr hdr;
6064         int status;
6065
6066         status = decode_compound_hdr(xdr, &hdr);
6067         if (status)
6068                 goto out;
6069         status = decode_sequence(xdr, &res->seq_res, rqstp);
6070         if (status)
6071                 goto out;
6072         status = decode_putfh(xdr);
6073         if (status != 0)
6074                 goto out;
6075         status = decode_access(xdr, &res->supported, &res->access);
6076         if (status != 0)
6077                 goto out;
6078         if (res->fattr)
6079                 decode_getfattr(xdr, res->fattr, res->server);
6080 out:
6081         return status;
6082 }
6083
6084 /*
6085  * Decode LOOKUP response
6086  */
6087 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6088                                void *data)
6089 {
6090         struct nfs4_lookup_res *res = data;
6091         struct compound_hdr hdr;
6092         int status;
6093
6094         status = decode_compound_hdr(xdr, &hdr);
6095         if (status)
6096                 goto out;
6097         status = decode_sequence(xdr, &res->seq_res, rqstp);
6098         if (status)
6099                 goto out;
6100         status = decode_putfh(xdr);
6101         if (status)
6102                 goto out;
6103         status = decode_lookup(xdr);
6104         if (status)
6105                 goto out;
6106         status = decode_getfh(xdr, res->fh);
6107         if (status)
6108                 goto out;
6109         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6110 out:
6111         return status;
6112 }
6113
6114 /*
6115  * Decode LOOKUPP response
6116  */
6117 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6118                 void *data)
6119 {
6120         struct nfs4_lookupp_res *res = data;
6121         struct compound_hdr hdr;
6122         int status;
6123
6124         status = decode_compound_hdr(xdr, &hdr);
6125         if (status)
6126                 goto out;
6127         status = decode_sequence(xdr, &res->seq_res, rqstp);
6128         if (status)
6129                 goto out;
6130         status = decode_putfh(xdr);
6131         if (status)
6132                 goto out;
6133         status = decode_lookupp(xdr);
6134         if (status)
6135                 goto out;
6136         status = decode_getfh(xdr, res->fh);
6137         if (status)
6138                 goto out;
6139         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6140 out:
6141         return status;
6142 }
6143
6144 /*
6145  * Decode LOOKUP_ROOT response
6146  */
6147 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6148                                     struct xdr_stream *xdr,
6149                                     void *data)
6150 {
6151         struct nfs4_lookup_res *res = data;
6152         struct compound_hdr hdr;
6153         int status;
6154
6155         status = decode_compound_hdr(xdr, &hdr);
6156         if (status)
6157                 goto out;
6158         status = decode_sequence(xdr, &res->seq_res, rqstp);
6159         if (status)
6160                 goto out;
6161         status = decode_putrootfh(xdr);
6162         if (status)
6163                 goto out;
6164         status = decode_getfh(xdr, res->fh);
6165         if (status == 0)
6166                 status = decode_getfattr_label(xdr, res->fattr,
6167                                                 res->label, res->server);
6168 out:
6169         return status;
6170 }
6171
6172 /*
6173  * Decode REMOVE response
6174  */
6175 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6176                                void *data)
6177 {
6178         struct nfs_removeres *res = data;
6179         struct compound_hdr hdr;
6180         int status;
6181
6182         status = decode_compound_hdr(xdr, &hdr);
6183         if (status)
6184                 goto out;
6185         status = decode_sequence(xdr, &res->seq_res, rqstp);
6186         if (status)
6187                 goto out;
6188         status = decode_putfh(xdr);
6189         if (status)
6190                 goto out;
6191         status = decode_remove(xdr, &res->cinfo);
6192 out:
6193         return status;
6194 }
6195
6196 /*
6197  * Decode RENAME response
6198  */
6199 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6200                                void *data)
6201 {
6202         struct nfs_renameres *res = data;
6203         struct compound_hdr hdr;
6204         int status;
6205
6206         status = decode_compound_hdr(xdr, &hdr);
6207         if (status)
6208                 goto out;
6209         status = decode_sequence(xdr, &res->seq_res, rqstp);
6210         if (status)
6211                 goto out;
6212         status = decode_putfh(xdr);
6213         if (status)
6214                 goto out;
6215         status = decode_savefh(xdr);
6216         if (status)
6217                 goto out;
6218         status = decode_putfh(xdr);
6219         if (status)
6220                 goto out;
6221         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6222 out:
6223         return status;
6224 }
6225
6226 /*
6227  * Decode LINK response
6228  */
6229 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6230                              void *data)
6231 {
6232         struct nfs4_link_res *res = data;
6233         struct compound_hdr hdr;
6234         int status;
6235
6236         status = decode_compound_hdr(xdr, &hdr);
6237         if (status)
6238                 goto out;
6239         status = decode_sequence(xdr, &res->seq_res, rqstp);
6240         if (status)
6241                 goto out;
6242         status = decode_putfh(xdr);
6243         if (status)
6244                 goto out;
6245         status = decode_savefh(xdr);
6246         if (status)
6247                 goto out;
6248         status = decode_putfh(xdr);
6249         if (status)
6250                 goto out;
6251         status = decode_link(xdr, &res->cinfo);
6252         if (status)
6253                 goto out;
6254         /*
6255          * Note order: OP_LINK leaves the directory as the current
6256          *             filehandle.
6257          */
6258         status = decode_restorefh(xdr);
6259         if (status)
6260                 goto out;
6261         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6262 out:
6263         return status;
6264 }
6265
6266 /*
6267  * Decode CREATE response
6268  */
6269 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6270                                void *data)
6271 {
6272         struct nfs4_create_res *res = data;
6273         struct compound_hdr hdr;
6274         int status;
6275
6276         status = decode_compound_hdr(xdr, &hdr);
6277         if (status)
6278                 goto out;
6279         status = decode_sequence(xdr, &res->seq_res, rqstp);
6280         if (status)
6281                 goto out;
6282         status = decode_putfh(xdr);
6283         if (status)
6284                 goto out;
6285         status = decode_create(xdr, &res->dir_cinfo);
6286         if (status)
6287                 goto out;
6288         status = decode_getfh(xdr, res->fh);
6289         if (status)
6290                 goto out;
6291         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6292 out:
6293         return status;
6294 }
6295
6296 /*
6297  * Decode SYMLINK response
6298  */
6299 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300                                 void *res)
6301 {
6302         return nfs4_xdr_dec_create(rqstp, xdr, res);
6303 }
6304
6305 /*
6306  * Decode GETATTR response
6307  */
6308 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6309                                 void *data)
6310 {
6311         struct nfs4_getattr_res *res = data;
6312         struct compound_hdr hdr;
6313         int status;
6314
6315         status = decode_compound_hdr(xdr, &hdr);
6316         if (status)
6317                 goto out;
6318         status = decode_sequence(xdr, &res->seq_res, rqstp);
6319         if (status)
6320                 goto out;
6321         status = decode_putfh(xdr);
6322         if (status)
6323                 goto out;
6324         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6325 out:
6326         return status;
6327 }
6328
6329 /*
6330  * Encode an SETACL request
6331  */
6332 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6333                                 const void *data)
6334 {
6335         const struct nfs_setaclargs *args = data;
6336         struct compound_hdr hdr = {
6337                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6338         };
6339
6340         encode_compound_hdr(xdr, req, &hdr);
6341         encode_sequence(xdr, &args->seq_args, &hdr);
6342         encode_putfh(xdr, args->fh, &hdr);
6343         encode_setacl(xdr, args, &hdr);
6344         encode_nops(&hdr);
6345 }
6346
6347 /*
6348  * Decode SETACL response
6349  */
6350 static int
6351 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6352                     void *data)
6353 {
6354         struct nfs_setaclres *res = data;
6355         struct compound_hdr hdr;
6356         int status;
6357
6358         status = decode_compound_hdr(xdr, &hdr);
6359         if (status)
6360                 goto out;
6361         status = decode_sequence(xdr, &res->seq_res, rqstp);
6362         if (status)
6363                 goto out;
6364         status = decode_putfh(xdr);
6365         if (status)
6366                 goto out;
6367         status = decode_setattr(xdr);
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode GETACL response
6374  */
6375 static int
6376 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6377                     void *data)
6378 {
6379         struct nfs_getaclres *res = data;
6380         struct compound_hdr hdr;
6381         int status;
6382
6383         if (res->acl_scratch != NULL) {
6384                 void *p = page_address(res->acl_scratch);
6385                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6386         }
6387         status = decode_compound_hdr(xdr, &hdr);
6388         if (status)
6389                 goto out;
6390         status = decode_sequence(xdr, &res->seq_res, rqstp);
6391         if (status)
6392                 goto out;
6393         status = decode_putfh(xdr);
6394         if (status)
6395                 goto out;
6396         status = decode_getacl(xdr, rqstp, res);
6397
6398 out:
6399         return status;
6400 }
6401
6402 /*
6403  * Decode CLOSE response
6404  */
6405 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406                               void *data)
6407 {
6408         struct nfs_closeres *res = data;
6409         struct compound_hdr hdr;
6410         int status;
6411
6412         status = decode_compound_hdr(xdr, &hdr);
6413         if (status)
6414                 goto out;
6415         status = decode_sequence(xdr, &res->seq_res, rqstp);
6416         if (status)
6417                 goto out;
6418         status = decode_putfh(xdr);
6419         if (status)
6420                 goto out;
6421         if (res->lr_res) {
6422                 status = decode_layoutreturn(xdr, res->lr_res);
6423                 res->lr_ret = status;
6424                 if (status)
6425                         goto out;
6426         }
6427         if (res->fattr != NULL) {
6428                 status = decode_getfattr(xdr, res->fattr, res->server);
6429                 if (status != 0)
6430                         goto out;
6431         }
6432         status = decode_close(xdr, res);
6433 out:
6434         return status;
6435 }
6436
6437 /*
6438  * Decode OPEN response
6439  */
6440 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6441                              void *data)
6442 {
6443         struct nfs_openres *res = data;
6444         struct compound_hdr hdr;
6445         int status;
6446
6447         status = decode_compound_hdr(xdr, &hdr);
6448         if (status)
6449                 goto out;
6450         status = decode_sequence(xdr, &res->seq_res, rqstp);
6451         if (status)
6452                 goto out;
6453         status = decode_putfh(xdr);
6454         if (status)
6455                 goto out;
6456         status = decode_open(xdr, res);
6457         if (status)
6458                 goto out;
6459         status = decode_getfh(xdr, &res->fh);
6460         if (status)
6461                 goto out;
6462         if (res->access_request)
6463                 decode_access(xdr, &res->access_supported, &res->access_result);
6464         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6465         if (res->lg_res)
6466                 decode_layoutget(xdr, rqstp, res->lg_res);
6467 out:
6468         return status;
6469 }
6470
6471 /*
6472  * Decode OPEN_CONFIRM response
6473  */
6474 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6475                                      struct xdr_stream *xdr,
6476                                      void *data)
6477 {
6478         struct nfs_open_confirmres *res = data;
6479         struct compound_hdr hdr;
6480         int status;
6481
6482         status = decode_compound_hdr(xdr, &hdr);
6483         if (status)
6484                 goto out;
6485         status = decode_putfh(xdr);
6486         if (status)
6487                 goto out;
6488         status = decode_open_confirm(xdr, res);
6489 out:
6490         return status;
6491 }
6492
6493 /*
6494  * Decode OPEN response
6495  */
6496 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6497                                     struct xdr_stream *xdr,
6498                                     void *data)
6499 {
6500         struct nfs_openres *res = data;
6501         struct compound_hdr hdr;
6502         int status;
6503
6504         status = decode_compound_hdr(xdr, &hdr);
6505         if (status)
6506                 goto out;
6507         status = decode_sequence(xdr, &res->seq_res, rqstp);
6508         if (status)
6509                 goto out;
6510         status = decode_putfh(xdr);
6511         if (status)
6512                 goto out;
6513         status = decode_open(xdr, res);
6514         if (status)
6515                 goto out;
6516         if (res->access_request)
6517                 decode_access(xdr, &res->access_supported, &res->access_result);
6518         decode_getfattr(xdr, res->f_attr, res->server);
6519         if (res->lg_res)
6520                 decode_layoutget(xdr, rqstp, res->lg_res);
6521 out:
6522         return status;
6523 }
6524
6525 /*
6526  * Decode SETATTR response
6527  */
6528 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6529                                 struct xdr_stream *xdr,
6530                                 void *data)
6531 {
6532         struct nfs_setattrres *res = data;
6533         struct compound_hdr hdr;
6534         int status;
6535
6536         status = decode_compound_hdr(xdr, &hdr);
6537         if (status)
6538                 goto out;
6539         status = decode_sequence(xdr, &res->seq_res, rqstp);
6540         if (status)
6541                 goto out;
6542         status = decode_putfh(xdr);
6543         if (status)
6544                 goto out;
6545         status = decode_setattr(xdr);
6546         if (status)
6547                 goto out;
6548         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6549 out:
6550         return status;
6551 }
6552
6553 /*
6554  * Decode LOCK response
6555  */
6556 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6557                              void *data)
6558 {
6559         struct nfs_lock_res *res = data;
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_lock(xdr, res);
6573 out:
6574         return status;
6575 }
6576
6577 /*
6578  * Decode LOCKT response
6579  */
6580 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6581                               void *data)
6582 {
6583         struct nfs_lockt_res *res = data;
6584         struct compound_hdr hdr;
6585         int status;
6586
6587         status = decode_compound_hdr(xdr, &hdr);
6588         if (status)
6589                 goto out;
6590         status = decode_sequence(xdr, &res->seq_res, rqstp);
6591         if (status)
6592                 goto out;
6593         status = decode_putfh(xdr);
6594         if (status)
6595                 goto out;
6596         status = decode_lockt(xdr, res);
6597 out:
6598         return status;
6599 }
6600
6601 /*
6602  * Decode LOCKU response
6603  */
6604 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6605                               void *data)
6606 {
6607         struct nfs_locku_res *res = data;
6608         struct compound_hdr hdr;
6609         int status;
6610
6611         status = decode_compound_hdr(xdr, &hdr);
6612         if (status)
6613                 goto out;
6614         status = decode_sequence(xdr, &res->seq_res, rqstp);
6615         if (status)
6616                 goto out;
6617         status = decode_putfh(xdr);
6618         if (status)
6619                 goto out;
6620         status = decode_locku(xdr, res);
6621 out:
6622         return status;
6623 }
6624
6625 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6626                                           struct xdr_stream *xdr, void *dummy)
6627 {
6628         struct compound_hdr hdr;
6629         int status;
6630
6631         status = decode_compound_hdr(xdr, &hdr);
6632         if (!status)
6633                 status = decode_release_lockowner(xdr);
6634         return status;
6635 }
6636
6637 /*
6638  * Decode READLINK response
6639  */
6640 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6641                                  struct xdr_stream *xdr,
6642                                  void *data)
6643 {
6644         struct nfs4_readlink_res *res = data;
6645         struct compound_hdr hdr;
6646         int status;
6647
6648         status = decode_compound_hdr(xdr, &hdr);
6649         if (status)
6650                 goto out;
6651         status = decode_sequence(xdr, &res->seq_res, rqstp);
6652         if (status)
6653                 goto out;
6654         status = decode_putfh(xdr);
6655         if (status)
6656                 goto out;
6657         status = decode_readlink(xdr, rqstp);
6658 out:
6659         return status;
6660 }
6661
6662 /*
6663  * Decode READDIR response
6664  */
6665 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6666                                 void *data)
6667 {
6668         struct nfs4_readdir_res *res = data;
6669         struct compound_hdr hdr;
6670         int status;
6671
6672         status = decode_compound_hdr(xdr, &hdr);
6673         if (status)
6674                 goto out;
6675         status = decode_sequence(xdr, &res->seq_res, rqstp);
6676         if (status)
6677                 goto out;
6678         status = decode_putfh(xdr);
6679         if (status)
6680                 goto out;
6681         status = decode_readdir(xdr, rqstp, res);
6682 out:
6683         return status;
6684 }
6685
6686 /*
6687  * Decode Read response
6688  */
6689 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6690                              void *data)
6691 {
6692         struct nfs_pgio_res *res = data;
6693         struct compound_hdr hdr;
6694         int status;
6695
6696         status = decode_compound_hdr(xdr, &hdr);
6697         res->op_status = hdr.status;
6698         if (status)
6699                 goto out;
6700         status = decode_sequence(xdr, &res->seq_res, rqstp);
6701         if (status)
6702                 goto out;
6703         status = decode_putfh(xdr);
6704         if (status)
6705                 goto out;
6706         status = decode_read(xdr, rqstp, res);
6707         if (!status)
6708                 status = res->count;
6709 out:
6710         return status;
6711 }
6712
6713 /*
6714  * Decode WRITE response
6715  */
6716 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717                               void *data)
6718 {
6719         struct nfs_pgio_res *res = data;
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         res->op_status = hdr.status;
6725         if (status)
6726                 goto out;
6727         status = decode_sequence(xdr, &res->seq_res, rqstp);
6728         if (status)
6729                 goto out;
6730         status = decode_putfh(xdr);
6731         if (status)
6732                 goto out;
6733         status = decode_write(xdr, res);
6734         if (status)
6735                 goto out;
6736         if (res->fattr)
6737                 decode_getfattr(xdr, res->fattr, res->server);
6738         if (!status)
6739                 status = res->count;
6740 out:
6741         return status;
6742 }
6743
6744 /*
6745  * Decode COMMIT response
6746  */
6747 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6748                                void *data)
6749 {
6750         struct nfs_commitres *res = data;
6751         struct compound_hdr hdr;
6752         int status;
6753
6754         status = decode_compound_hdr(xdr, &hdr);
6755         res->op_status = hdr.status;
6756         if (status)
6757                 goto out;
6758         status = decode_sequence(xdr, &res->seq_res, rqstp);
6759         if (status)
6760                 goto out;
6761         status = decode_putfh(xdr);
6762         if (status)
6763                 goto out;
6764         status = decode_commit(xdr, res);
6765 out:
6766         return status;
6767 }
6768
6769 /*
6770  * Decode FSINFO response
6771  */
6772 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6773                                void *data)
6774 {
6775         struct nfs4_fsinfo_res *res = data;
6776         struct compound_hdr hdr;
6777         int status;
6778
6779         status = decode_compound_hdr(xdr, &hdr);
6780         if (!status)
6781                 status = decode_sequence(xdr, &res->seq_res, req);
6782         if (!status)
6783                 status = decode_putfh(xdr);
6784         if (!status)
6785                 status = decode_fsinfo(xdr, res->fsinfo);
6786         return status;
6787 }
6788
6789 /*
6790  * Decode PATHCONF response
6791  */
6792 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6793                                  void *data)
6794 {
6795         struct nfs4_pathconf_res *res = data;
6796         struct compound_hdr hdr;
6797         int status;
6798
6799         status = decode_compound_hdr(xdr, &hdr);
6800         if (!status)
6801                 status = decode_sequence(xdr, &res->seq_res, req);
6802         if (!status)
6803                 status = decode_putfh(xdr);
6804         if (!status)
6805                 status = decode_pathconf(xdr, res->pathconf);
6806         return status;
6807 }
6808
6809 /*
6810  * Decode STATFS response
6811  */
6812 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6813                                void *data)
6814 {
6815         struct nfs4_statfs_res *res = data;
6816         struct compound_hdr hdr;
6817         int status;
6818
6819         status = decode_compound_hdr(xdr, &hdr);
6820         if (!status)
6821                 status = decode_sequence(xdr, &res->seq_res, req);
6822         if (!status)
6823                 status = decode_putfh(xdr);
6824         if (!status)
6825                 status = decode_statfs(xdr, res->fsstat);
6826         return status;
6827 }
6828
6829 /*
6830  * Decode GETATTR_BITMAP response
6831  */
6832 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6833                                     struct xdr_stream *xdr,
6834                                     void *data)
6835 {
6836         struct nfs4_server_caps_res *res = data;
6837         struct compound_hdr hdr;
6838         int status;
6839
6840         status = decode_compound_hdr(xdr, &hdr);
6841         if (status)
6842                 goto out;
6843         status = decode_sequence(xdr, &res->seq_res, req);
6844         if (status)
6845                 goto out;
6846         status = decode_putfh(xdr);
6847         if (status)
6848                 goto out;
6849         status = decode_server_caps(xdr, res);
6850 out:
6851         return status;
6852 }
6853
6854 /*
6855  * Decode RENEW response
6856  */
6857 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6858                               void *__unused)
6859 {
6860         struct compound_hdr hdr;
6861         int status;
6862
6863         status = decode_compound_hdr(xdr, &hdr);
6864         if (!status)
6865                 status = decode_renew(xdr);
6866         return status;
6867 }
6868
6869 /*
6870  * Decode SETCLIENTID response
6871  */
6872 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6873                                     struct xdr_stream *xdr,
6874                                     void *data)
6875 {
6876         struct nfs4_setclientid_res *res = data;
6877         struct compound_hdr hdr;
6878         int status;
6879
6880         status = decode_compound_hdr(xdr, &hdr);
6881         if (!status)
6882                 status = decode_setclientid(xdr, res);
6883         return status;
6884 }
6885
6886 /*
6887  * Decode SETCLIENTID_CONFIRM response
6888  */
6889 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6890                                             struct xdr_stream *xdr,
6891                                             void *data)
6892 {
6893         struct compound_hdr hdr;
6894         int status;
6895
6896         status = decode_compound_hdr(xdr, &hdr);
6897         if (!status)
6898                 status = decode_setclientid_confirm(xdr);
6899         return status;
6900 }
6901
6902 /*
6903  * Decode DELEGRETURN response
6904  */
6905 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6906                                     struct xdr_stream *xdr,
6907                                     void *data)
6908 {
6909         struct nfs4_delegreturnres *res = data;
6910         struct compound_hdr hdr;
6911         int status;
6912
6913         status = decode_compound_hdr(xdr, &hdr);
6914         if (status)
6915                 goto out;
6916         status = decode_sequence(xdr, &res->seq_res, rqstp);
6917         if (status)
6918                 goto out;
6919         status = decode_putfh(xdr);
6920         if (status != 0)
6921                 goto out;
6922         if (res->lr_res) {
6923                 status = decode_layoutreturn(xdr, res->lr_res);
6924                 res->lr_ret = status;
6925                 if (status)
6926                         goto out;
6927         }
6928         if (res->fattr) {
6929                 status = decode_getfattr(xdr, res->fattr, res->server);
6930                 if (status != 0)
6931                         goto out;
6932         }
6933         status = decode_delegreturn(xdr);
6934 out:
6935         return status;
6936 }
6937
6938 /*
6939  * Decode FS_LOCATIONS response
6940  */
6941 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6942                                      struct xdr_stream *xdr,
6943                                      void *data)
6944 {
6945         struct nfs4_fs_locations_res *res = data;
6946         struct compound_hdr hdr;
6947         int status;
6948
6949         status = decode_compound_hdr(xdr, &hdr);
6950         if (status)
6951                 goto out;
6952         status = decode_sequence(xdr, &res->seq_res, req);
6953         if (status)
6954                 goto out;
6955         status = decode_putfh(xdr);
6956         if (status)
6957                 goto out;
6958         if (res->migration) {
6959                 xdr_enter_page(xdr, PAGE_SIZE);
6960                 status = decode_getfattr_generic(xdr,
6961                                         &res->fs_locations->fattr,
6962                                          NULL, res->fs_locations,
6963                                          NULL, res->fs_locations->server);
6964                 if (status)
6965                         goto out;
6966                 if (res->renew)
6967                         status = decode_renew(xdr);
6968         } else {
6969                 status = decode_lookup(xdr);
6970                 if (status)
6971                         goto out;
6972                 xdr_enter_page(xdr, PAGE_SIZE);
6973                 status = decode_getfattr_generic(xdr,
6974                                         &res->fs_locations->fattr,
6975                                          NULL, res->fs_locations,
6976                                          NULL, res->fs_locations->server);
6977         }
6978 out:
6979         return status;
6980 }
6981
6982 /*
6983  * Decode SECINFO response
6984  */
6985 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6986                                 struct xdr_stream *xdr,
6987                                 void *data)
6988 {
6989         struct nfs4_secinfo_res *res = data;
6990         struct compound_hdr hdr;
6991         int status;
6992
6993         status = decode_compound_hdr(xdr, &hdr);
6994         if (status)
6995                 goto out;
6996         status = decode_sequence(xdr, &res->seq_res, rqstp);
6997         if (status)
6998                 goto out;
6999         status = decode_putfh(xdr);
7000         if (status)
7001                 goto out;
7002         status = decode_secinfo(xdr, res);
7003 out:
7004         return status;
7005 }
7006
7007 /*
7008  * Decode FSID_PRESENT response
7009  */
7010 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7011                                      struct xdr_stream *xdr,
7012                                      void *data)
7013 {
7014         struct nfs4_fsid_present_res *res = data;
7015         struct compound_hdr hdr;
7016         int status;
7017
7018         status = decode_compound_hdr(xdr, &hdr);
7019         if (status)
7020                 goto out;
7021         status = decode_sequence(xdr, &res->seq_res, rqstp);
7022         if (status)
7023                 goto out;
7024         status = decode_putfh(xdr);
7025         if (status)
7026                 goto out;
7027         status = decode_getfh(xdr, res->fh);
7028         if (status)
7029                 goto out;
7030         if (res->renew)
7031                 status = decode_renew(xdr);
7032 out:
7033         return status;
7034 }
7035
7036 #if defined(CONFIG_NFS_V4_1)
7037 /*
7038  * Decode BIND_CONN_TO_SESSION response
7039  */
7040 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7041                                         struct xdr_stream *xdr,
7042                                         void *res)
7043 {
7044         struct compound_hdr hdr;
7045         int status;
7046
7047         status = decode_compound_hdr(xdr, &hdr);
7048         if (!status)
7049                 status = decode_bind_conn_to_session(xdr, res);
7050         return status;
7051 }
7052
7053 /*
7054  * Decode EXCHANGE_ID response
7055  */
7056 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7057                                     struct xdr_stream *xdr,
7058                                     void *res)
7059 {
7060         struct compound_hdr hdr;
7061         int status;
7062
7063         status = decode_compound_hdr(xdr, &hdr);
7064         if (!status)
7065                 status = decode_exchange_id(xdr, res);
7066         return status;
7067 }
7068
7069 /*
7070  * Decode CREATE_SESSION response
7071  */
7072 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7073                                        struct xdr_stream *xdr,
7074                                        void *res)
7075 {
7076         struct compound_hdr hdr;
7077         int status;
7078
7079         status = decode_compound_hdr(xdr, &hdr);
7080         if (!status)
7081                 status = decode_create_session(xdr, res);
7082         return status;
7083 }
7084
7085 /*
7086  * Decode DESTROY_SESSION response
7087  */
7088 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7089                                         struct xdr_stream *xdr,
7090                                         void *res)
7091 {
7092         struct compound_hdr hdr;
7093         int status;
7094
7095         status = decode_compound_hdr(xdr, &hdr);
7096         if (!status)
7097                 status = decode_destroy_session(xdr, res);
7098         return status;
7099 }
7100
7101 /*
7102  * Decode DESTROY_CLIENTID response
7103  */
7104 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7105                                         struct xdr_stream *xdr,
7106                                         void *res)
7107 {
7108         struct compound_hdr hdr;
7109         int status;
7110
7111         status = decode_compound_hdr(xdr, &hdr);
7112         if (!status)
7113                 status = decode_destroy_clientid(xdr, res);
7114         return status;
7115 }
7116
7117 /*
7118  * Decode SEQUENCE response
7119  */
7120 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7121                                  struct xdr_stream *xdr,
7122                                  void *res)
7123 {
7124         struct compound_hdr hdr;
7125         int status;
7126
7127         status = decode_compound_hdr(xdr, &hdr);
7128         if (!status)
7129                 status = decode_sequence(xdr, res, rqstp);
7130         return status;
7131 }
7132
7133 /*
7134  * Decode GET_LEASE_TIME response
7135  */
7136 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7137                                        struct xdr_stream *xdr,
7138                                        void *data)
7139 {
7140         struct nfs4_get_lease_time_res *res = data;
7141         struct compound_hdr hdr;
7142         int status;
7143
7144         status = decode_compound_hdr(xdr, &hdr);
7145         if (!status)
7146                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7147         if (!status)
7148                 status = decode_putrootfh(xdr);
7149         if (!status)
7150                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7151         return status;
7152 }
7153
7154 /*
7155  * Decode RECLAIM_COMPLETE response
7156  */
7157 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7158                                          struct xdr_stream *xdr,
7159                                          void *data)
7160 {
7161         struct nfs41_reclaim_complete_res *res = data;
7162         struct compound_hdr hdr;
7163         int status;
7164
7165         status = decode_compound_hdr(xdr, &hdr);
7166         if (!status)
7167                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7168         if (!status)
7169                 status = decode_reclaim_complete(xdr, NULL);
7170         return status;
7171 }
7172
7173 /*
7174  * Decode GETDEVINFO response
7175  */
7176 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7177                                       struct xdr_stream *xdr,
7178                                       void *data)
7179 {
7180         struct nfs4_getdeviceinfo_res *res = data;
7181         struct compound_hdr hdr;
7182         int status;
7183
7184         status = decode_compound_hdr(xdr, &hdr);
7185         if (status != 0)
7186                 goto out;
7187         status = decode_sequence(xdr, &res->seq_res, rqstp);
7188         if (status != 0)
7189                 goto out;
7190         status = decode_getdeviceinfo(xdr, res);
7191 out:
7192         return status;
7193 }
7194
7195 /*
7196  * Decode LAYOUTGET response
7197  */
7198 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7199                                   struct xdr_stream *xdr,
7200                                   void *data)
7201 {
7202         struct nfs4_layoutget_res *res = data;
7203         struct compound_hdr hdr;
7204         int status;
7205
7206         status = decode_compound_hdr(xdr, &hdr);
7207         if (status)
7208                 goto out;
7209         status = decode_sequence(xdr, &res->seq_res, rqstp);
7210         if (status)
7211                 goto out;
7212         status = decode_putfh(xdr);
7213         if (status)
7214                 goto out;
7215         status = decode_layoutget(xdr, rqstp, res);
7216 out:
7217         return status;
7218 }
7219
7220 /*
7221  * Decode LAYOUTRETURN response
7222  */
7223 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7224                                      struct xdr_stream *xdr,
7225                                      void *data)
7226 {
7227         struct nfs4_layoutreturn_res *res = data;
7228         struct compound_hdr hdr;
7229         int status;
7230
7231         status = decode_compound_hdr(xdr, &hdr);
7232         if (status)
7233                 goto out;
7234         status = decode_sequence(xdr, &res->seq_res, rqstp);
7235         if (status)
7236                 goto out;
7237         status = decode_putfh(xdr);
7238         if (status)
7239                 goto out;
7240         status = decode_layoutreturn(xdr, res);
7241 out:
7242         return status;
7243 }
7244
7245 /*
7246  * Decode LAYOUTCOMMIT response
7247  */
7248 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7249                                      struct xdr_stream *xdr,
7250                                      void *data)
7251 {
7252         struct nfs4_layoutcommit_res *res = data;
7253         struct compound_hdr hdr;
7254         int status;
7255
7256         status = decode_compound_hdr(xdr, &hdr);
7257         if (status)
7258                 goto out;
7259         status = decode_sequence(xdr, &res->seq_res, rqstp);
7260         if (status)
7261                 goto out;
7262         status = decode_putfh(xdr);
7263         if (status)
7264                 goto out;
7265         status = decode_layoutcommit(xdr, rqstp, res);
7266         if (status)
7267                 goto out;
7268         decode_getfattr(xdr, res->fattr, res->server);
7269 out:
7270         return status;
7271 }
7272
7273 /*
7274  * Decode SECINFO_NO_NAME response
7275  */
7276 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7277                                         struct xdr_stream *xdr,
7278                                         void *data)
7279 {
7280         struct nfs4_secinfo_res *res = data;
7281         struct compound_hdr hdr;
7282         int status;
7283
7284         status = decode_compound_hdr(xdr, &hdr);
7285         if (status)
7286                 goto out;
7287         status = decode_sequence(xdr, &res->seq_res, rqstp);
7288         if (status)
7289                 goto out;
7290         status = decode_putrootfh(xdr);
7291         if (status)
7292                 goto out;
7293         status = decode_secinfo_no_name(xdr, res);
7294 out:
7295         return status;
7296 }
7297
7298 /*
7299  * Decode TEST_STATEID response
7300  */
7301 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7302                                      struct xdr_stream *xdr,
7303                                      void *data)
7304 {
7305         struct nfs41_test_stateid_res *res = data;
7306         struct compound_hdr hdr;
7307         int status;
7308
7309         status = decode_compound_hdr(xdr, &hdr);
7310         if (status)
7311                 goto out;
7312         status = decode_sequence(xdr, &res->seq_res, rqstp);
7313         if (status)
7314                 goto out;
7315         status = decode_test_stateid(xdr, res);
7316 out:
7317         return status;
7318 }
7319
7320 /*
7321  * Decode FREE_STATEID response
7322  */
7323 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7324                                      struct xdr_stream *xdr,
7325                                      void *data)
7326 {
7327         struct nfs41_free_stateid_res *res = data;
7328         struct compound_hdr hdr;
7329         int status;
7330
7331         status = decode_compound_hdr(xdr, &hdr);
7332         if (status)
7333                 goto out;
7334         status = decode_sequence(xdr, &res->seq_res, rqstp);
7335         if (status)
7336                 goto out;
7337         status = decode_free_stateid(xdr, res);
7338 out:
7339         return status;
7340 }
7341 #endif /* CONFIG_NFS_V4_1 */
7342
7343 /**
7344  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7345  *                      the local page cache.
7346  * @xdr: XDR stream where entry resides
7347  * @entry: buffer to fill in with entry data
7348  * @plus: boolean indicating whether this should be a readdirplus entry
7349  *
7350  * Returns zero if successful, otherwise a negative errno value is
7351  * returned.
7352  *
7353  * This function is not invoked during READDIR reply decoding, but
7354  * rather whenever an application invokes the getdents(2) system call
7355  * on a directory already in our cache.
7356  */
7357 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7358                        bool plus)
7359 {
7360         unsigned int savep;
7361         uint32_t bitmap[3] = {0};
7362         uint32_t len;
7363         uint64_t new_cookie;
7364         __be32 *p = xdr_inline_decode(xdr, 4);
7365         if (unlikely(!p))
7366                 return -EAGAIN;
7367         if (*p == xdr_zero) {
7368                 p = xdr_inline_decode(xdr, 4);
7369                 if (unlikely(!p))
7370                         return -EAGAIN;
7371                 if (*p == xdr_zero)
7372                         return -EAGAIN;
7373                 entry->eof = 1;
7374                 return -EBADCOOKIE;
7375         }
7376
7377         p = xdr_inline_decode(xdr, 12);
7378         if (unlikely(!p))
7379                 return -EAGAIN;
7380         p = xdr_decode_hyper(p, &new_cookie);
7381         entry->len = be32_to_cpup(p);
7382
7383         p = xdr_inline_decode(xdr, entry->len);
7384         if (unlikely(!p))
7385                 return -EAGAIN;
7386         entry->name = (const char *) p;
7387
7388         /*
7389          * In case the server doesn't return an inode number,
7390          * we fake one here.  (We don't use inode number 0,
7391          * since glibc seems to choke on it...)
7392          */
7393         entry->ino = 1;
7394         entry->fattr->valid = 0;
7395
7396         if (decode_attr_bitmap(xdr, bitmap) < 0)
7397                 return -EAGAIN;
7398
7399         if (decode_attr_length(xdr, &len, &savep) < 0)
7400                 return -EAGAIN;
7401
7402         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7403                         NULL, entry->label, entry->server) < 0)
7404                 return -EAGAIN;
7405         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7406                 entry->ino = entry->fattr->mounted_on_fileid;
7407         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7408                 entry->ino = entry->fattr->fileid;
7409
7410         entry->d_type = DT_UNKNOWN;
7411         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7412                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7413
7414         entry->prev_cookie = entry->cookie;
7415         entry->cookie = new_cookie;
7416
7417         return 0;
7418 }
7419
7420 /*
7421  * We need to translate between nfs status return values and
7422  * the local errno values which may not be the same.
7423  */
7424 static struct {
7425         int stat;
7426         int errno;
7427 } nfs_errtbl[] = {
7428         { NFS4_OK,              0               },
7429         { NFS4ERR_PERM,         -EPERM          },
7430         { NFS4ERR_NOENT,        -ENOENT         },
7431         { NFS4ERR_IO,           -errno_NFSERR_IO},
7432         { NFS4ERR_NXIO,         -ENXIO          },
7433         { NFS4ERR_ACCESS,       -EACCES         },
7434         { NFS4ERR_EXIST,        -EEXIST         },
7435         { NFS4ERR_XDEV,         -EXDEV          },
7436         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7437         { NFS4ERR_ISDIR,        -EISDIR         },
7438         { NFS4ERR_INVAL,        -EINVAL         },
7439         { NFS4ERR_FBIG,         -EFBIG          },
7440         { NFS4ERR_NOSPC,        -ENOSPC         },
7441         { NFS4ERR_ROFS,         -EROFS          },
7442         { NFS4ERR_MLINK,        -EMLINK         },
7443         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7444         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7445         { NFS4ERR_DQUOT,        -EDQUOT         },
7446         { NFS4ERR_STALE,        -ESTALE         },
7447         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7448         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7449         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7450         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7451         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7452         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7453         { NFS4ERR_LOCKED,       -EAGAIN         },
7454         { NFS4ERR_SYMLINK,      -ELOOP          },
7455         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7456         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7457         { -1,                   -EIO            }
7458 };
7459
7460 /*
7461  * Convert an NFS error code to a local one.
7462  * This one is used jointly by NFSv2 and NFSv3.
7463  */
7464 static int
7465 nfs4_stat_to_errno(int stat)
7466 {
7467         int i;
7468         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7469                 if (nfs_errtbl[i].stat == stat)
7470                         return nfs_errtbl[i].errno;
7471         }
7472         if (stat <= 10000 || stat > 10100) {
7473                 /* The server is looney tunes. */
7474                 return -EREMOTEIO;
7475         }
7476         /* If we cannot translate the error, the recovery routines should
7477          * handle it.
7478          * Note: remaining NFSv4 error codes have values > 10000, so should
7479          * not conflict with native Linux error codes.
7480          */
7481         return -stat;
7482 }
7483
7484 #ifdef CONFIG_NFS_V4_2
7485 #include "nfs42xdr.c"
7486 #endif /* CONFIG_NFS_V4_2 */
7487
7488 #define PROC(proc, argtype, restype)                            \
7489 [NFSPROC4_CLNT_##proc] = {                                      \
7490         .p_proc   = NFSPROC4_COMPOUND,                          \
7491         .p_encode = nfs4_xdr_##argtype,                         \
7492         .p_decode = nfs4_xdr_##restype,                         \
7493         .p_arglen = NFS4_##argtype##_sz,                        \
7494         .p_replen = NFS4_##restype##_sz,                        \
7495         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7496         .p_name   = #proc,                                      \
7497 }
7498
7499 #define STUB(proc)              \
7500 [NFSPROC4_CLNT_##proc] = {      \
7501         .p_name = #proc,        \
7502 }
7503
7504 #if defined(CONFIG_NFS_V4_1)
7505 #define PROC41(proc, argtype, restype)                          \
7506         PROC(proc, argtype, restype)
7507 #else
7508 #define PROC41(proc, argtype, restype)                          \
7509         STUB(proc)
7510 #endif
7511
7512 #if defined(CONFIG_NFS_V4_2)
7513 #define PROC42(proc, argtype, restype)                          \
7514         PROC(proc, argtype, restype)
7515 #else
7516 #define PROC42(proc, argtype, restype)                          \
7517         STUB(proc)
7518 #endif
7519
7520 const struct rpc_procinfo nfs4_procedures[] = {
7521         PROC(READ,              enc_read,               dec_read),
7522         PROC(WRITE,             enc_write,              dec_write),
7523         PROC(COMMIT,            enc_commit,             dec_commit),
7524         PROC(OPEN,              enc_open,               dec_open),
7525         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7526         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7527         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7528         PROC(CLOSE,             enc_close,              dec_close),
7529         PROC(SETATTR,           enc_setattr,            dec_setattr),
7530         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7531         PROC(RENEW,             enc_renew,              dec_renew),
7532         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7533         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7534         PROC(LOCK,              enc_lock,               dec_lock),
7535         PROC(LOCKT,             enc_lockt,              dec_lockt),
7536         PROC(LOCKU,             enc_locku,              dec_locku),
7537         PROC(ACCESS,            enc_access,             dec_access),
7538         PROC(GETATTR,           enc_getattr,            dec_getattr),
7539         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7540         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7541         PROC(REMOVE,            enc_remove,             dec_remove),
7542         PROC(RENAME,            enc_rename,             dec_rename),
7543         PROC(LINK,              enc_link,               dec_link),
7544         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7545         PROC(CREATE,            enc_create,             dec_create),
7546         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7547         PROC(STATFS,            enc_statfs,             dec_statfs),
7548         PROC(READLINK,          enc_readlink,           dec_readlink),
7549         PROC(READDIR,           enc_readdir,            dec_readdir),
7550         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7551         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7552         PROC(GETACL,            enc_getacl,             dec_getacl),
7553         PROC(SETACL,            enc_setacl,             dec_setacl),
7554         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7555         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7556         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7557         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7558         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7559         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7560         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7561         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7562         PROC41(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
7563         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7564         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7565         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7566         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7567         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7568         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7569         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7570         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7571         STUB(GETDEVICELIST),
7572         PROC41(BIND_CONN_TO_SESSION,
7573                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7574         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7575         PROC42(SEEK,            enc_seek,               dec_seek),
7576         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7577         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7578         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7579         PROC42(CLONE,           enc_clone,              dec_clone),
7580         PROC42(COPY,            enc_copy,               dec_copy),
7581         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7582         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7583 };
7584
7585 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7586 const struct rpc_version nfs_version4 = {
7587         .number                 = 4,
7588         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7589         .procs                  = nfs4_procedures,
7590         .counts                 = nfs_version4_counts,
7591 };
7592
7593 /*
7594  * Local variables:
7595  *  c-basic-offset: 8
7596  * End:
7597  */