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 + 1)
 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 + 1)
 224 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + 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 + 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                                 (1)
 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                                 1 /* possible XDR padding */)
 397 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 398                                 encode_stateid_maxsz)
 399 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 400                                 decode_stateid_maxsz + \
 401                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
 402 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 403                                 2 /* offset */ + \
 404                                 2 /* length */ + \
 405                                 1 /* reclaim */ + \
 406                                 encode_stateid_maxsz + \
 407                                 1 /* new offset (true) */ + \
 408                                 2 /* last byte written */ + \
 409                                 1 /* nt_timechanged (false) */ + \
 410                                 1 /* layoutupdate4 layout type */ + \
 411                                 1 /* layoutupdate4 opaqueue len */)
 412                                   /* the actual content of layoutupdate4 should
 413                                      be allocated by drivers and spliced in
 414                                      using xdr_write_pages */
 415 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 416 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 417                                 encode_stateid_maxsz + \
 418                                 1 + \
 419                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 420 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 421                                 1 + decode_stateid_maxsz)
 422 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 423 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 424 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 425                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 426 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 427 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 428                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 429 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 430 #else /* CONFIG_NFS_V4_1 */
 431 #define encode_sequence_maxsz   0
 432 #define decode_sequence_maxsz   0
 433 #define encode_layoutreturn_maxsz 0
 434 #define decode_layoutreturn_maxsz 0
 435 #define encode_layoutget_maxsz  0
 436 #define decode_layoutget_maxsz  0
 437 #endif /* CONFIG_NFS_V4_1 */
 438
 439 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 440 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 441 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_read_maxsz)
 445 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_read_maxsz)
 449 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_readlink_maxsz)
 453 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 454                                 decode_sequence_maxsz + \
 455                                 decode_putfh_maxsz + \
 456                                 decode_readlink_maxsz)
 457 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 458                                 encode_sequence_maxsz + \
 459                                 encode_putfh_maxsz + \
 460                                 encode_readdir_maxsz)
 461 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 462                                 decode_sequence_maxsz + \
 463                                 decode_putfh_maxsz + \
 464                                 decode_readdir_maxsz)
 465 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_write_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_write_maxsz + \
 474                                 decode_getattr_maxsz)
 475 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 476                                 encode_sequence_maxsz + \
 477                                 encode_putfh_maxsz + \
 478                                 encode_commit_maxsz)
 479 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 480                                 decode_sequence_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_commit_maxsz)
 483 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 484                                 encode_sequence_maxsz + \
 485                                 encode_putfh_maxsz + \
 486                                 encode_open_maxsz + \
 487                                 encode_access_maxsz + \
 488                                 encode_getfh_maxsz + \
 489                                 encode_getattr_maxsz + \
 490                                 encode_layoutget_maxsz)
 491 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_open_maxsz + \
 495                                 decode_access_maxsz + \
 496                                 decode_getfh_maxsz + \
 497                                 decode_getattr_maxsz + \
 498                                 decode_layoutget_maxsz)
 499 #define NFS4_enc_open_confirm_sz \
 500                                 (compound_encode_hdr_maxsz + \
 501                                  encode_putfh_maxsz + \
 502                                  encode_open_confirm_maxsz)
 503 #define NFS4_dec_open_confirm_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_open_confirm_maxsz)
 507 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 508                                         encode_sequence_maxsz + \
 509                                         encode_putfh_maxsz + \
 510                                         encode_open_maxsz + \
 511                                         encode_access_maxsz + \
 512                                         encode_getattr_maxsz + \
 513                                         encode_layoutget_maxsz)
 514 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 515                                         decode_sequence_maxsz + \
 516                                         decode_putfh_maxsz + \
 517                                         decode_open_maxsz + \
 518                                         decode_access_maxsz + \
 519                                         decode_getattr_maxsz + \
 520                                         decode_layoutget_maxsz)
 521 #define NFS4_enc_open_downgrade_sz \
 522                                 (compound_encode_hdr_maxsz + \
 523                                  encode_sequence_maxsz + \
 524                                  encode_putfh_maxsz + \
 525                                  encode_layoutreturn_maxsz + \
 526                                  encode_open_downgrade_maxsz)
 527 #define NFS4_dec_open_downgrade_sz \
 528                                 (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_layoutreturn_maxsz + \
 532                                  decode_open_downgrade_maxsz)
 533 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 534                                  encode_sequence_maxsz + \
 535                                  encode_putfh_maxsz + \
 536                                  encode_layoutreturn_maxsz + \
 537                                  encode_close_maxsz + \
 538                                  encode_getattr_maxsz)
 539 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 540                                  decode_sequence_maxsz + \
 541                                  decode_putfh_maxsz + \
 542                                  decode_layoutreturn_maxsz + \
 543                                  decode_close_maxsz + \
 544                                  decode_getattr_maxsz)
 545 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 546                                  encode_sequence_maxsz + \
 547                                  encode_putfh_maxsz + \
 548                                  encode_setattr_maxsz + \
 549                                  encode_getattr_maxsz)
 550 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 551                                  decode_sequence_maxsz + \
 552                                  decode_putfh_maxsz + \
 553                                  decode_setattr_maxsz + \
 554                                  decode_getattr_maxsz)
 555 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_fsinfo_maxsz)
 559 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_fsinfo_maxsz)
 563 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_renew_maxsz)
 565 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 566                                 decode_renew_maxsz)
 567 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 568                                 encode_setclientid_maxsz)
 569 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 570                                 decode_setclientid_maxsz)
 571 #define NFS4_enc_setclientid_confirm_sz \
 572                                 (compound_encode_hdr_maxsz + \
 573                                 encode_setclientid_confirm_maxsz)
 574 #define NFS4_dec_setclientid_confirm_sz \
 575                                 (compound_decode_hdr_maxsz + \
 576                                 decode_setclientid_confirm_maxsz)
 577 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_lock_maxsz)
 581 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_lock_maxsz)
 585 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_lockt_maxsz)
 589 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 590                                  decode_sequence_maxsz + \
 591                                  decode_putfh_maxsz + \
 592                                  decode_lockt_maxsz)
 593 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 594                                 encode_sequence_maxsz + \
 595                                 encode_putfh_maxsz + \
 596                                 encode_locku_maxsz)
 597 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 598                                 decode_sequence_maxsz + \
 599                                 decode_putfh_maxsz + \
 600                                 decode_locku_maxsz)
 601 #define NFS4_enc_release_lockowner_sz \
 602                                 (compound_encode_hdr_maxsz + \
 603                                  encode_lockowner_maxsz)
 604 #define NFS4_dec_release_lockowner_sz \
 605                                 (compound_decode_hdr_maxsz + \
 606                                  decode_lockowner_maxsz)
 607 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_access_maxsz + \
 611                                 encode_getattr_maxsz)
 612 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 613                                 decode_sequence_maxsz + \
 614                                 decode_putfh_maxsz + \
 615                                 decode_access_maxsz + \
 616                                 decode_getattr_maxsz)
 617 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 618                                 encode_sequence_maxsz + \
 619                                 encode_putfh_maxsz + \
 620                                 encode_getattr_maxsz + \
 621                                 encode_renew_maxsz)
 622 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_getattr_maxsz + \
 626                                 decode_renew_maxsz)
 627 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_lookup_maxsz + \
 631                                 encode_getattr_maxsz + \
 632                                 encode_getfh_maxsz)
 633 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_lookup_maxsz + \
 637                                 decode_getattr_maxsz + \
 638                                 decode_getfh_maxsz)
 639 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_lookupp_maxsz + \
 643                                 encode_getattr_maxsz + \
 644                                 encode_getfh_maxsz)
 645 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_lookupp_maxsz + \
 649                                 decode_getattr_maxsz + \
 650                                 decode_getfh_maxsz)
 651 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putrootfh_maxsz + \
 654                                 encode_getattr_maxsz + \
 655                                 encode_getfh_maxsz)
 656 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 657                                 decode_sequence_maxsz + \
 658                                 decode_putrootfh_maxsz + \
 659                                 decode_getattr_maxsz + \
 660                                 decode_getfh_maxsz)
 661 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_remove_maxsz)
 665 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_remove_maxsz)
 669 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_savefh_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_rename_maxsz)
 675 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_savefh_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_rename_maxsz)
 681 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_savefh_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_link_maxsz + \
 687                                 encode_restorefh_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_savefh_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_link_maxsz + \
 695                                 decode_restorefh_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_symlink_maxsz + \
 701                                 encode_getattr_maxsz + \
 702                                 encode_getfh_maxsz)
 703 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_symlink_maxsz + \
 707                                 decode_getattr_maxsz + \
 708                                 decode_getfh_maxsz)
 709 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_create_maxsz + \
 713                                 encode_getfh_maxsz + \
 714                                 encode_getattr_maxsz)
 715 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 716                                 decode_sequence_maxsz + \
 717                                 decode_putfh_maxsz + \
 718                                 decode_create_maxsz + \
 719                                 decode_getfh_maxsz + \
 720                                 decode_getattr_maxsz)
 721 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_getattr_maxsz)
 725 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_getattr_maxsz)
 729 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 730                                 encode_sequence_maxsz + \
 731                                 encode_putfh_maxsz + \
 732                                 encode_statfs_maxsz)
 733 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 734                                 decode_sequence_maxsz + \
 735                                 decode_putfh_maxsz + \
 736                                 decode_statfs_maxsz)
 737 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 738                                 encode_sequence_maxsz + \
 739                                 encode_putfh_maxsz + \
 740                                 encode_getattr_maxsz)
 741 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 742                                 decode_sequence_maxsz + \
 743                                 decode_putfh_maxsz + \
 744                                 decode_getattr_maxsz)
 745 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 746                                 encode_sequence_maxsz + \
 747                                 encode_putfh_maxsz + \
 748                                 encode_layoutreturn_maxsz + \
 749                                 encode_delegreturn_maxsz + \
 750                                 encode_getattr_maxsz)
 751 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 752                                 decode_sequence_maxsz + \
 753                                 decode_putfh_maxsz + \
 754                                 decode_layoutreturn_maxsz + \
 755                                 decode_delegreturn_maxsz + \
 756                                 decode_getattr_maxsz)
 757 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_getacl_maxsz)
 761 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_getacl_maxsz)
 765 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 766                                 encode_sequence_maxsz + \
 767                                 encode_putfh_maxsz + \
 768                                 encode_setacl_maxsz)
 769 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 770                                 decode_sequence_maxsz + \
 771                                 decode_putfh_maxsz + \
 772                                 decode_setacl_maxsz)
 773 #define NFS4_enc_fs_locations_sz \
 774                                 (compound_encode_hdr_maxsz + \
 775                                  encode_sequence_maxsz + \
 776                                  encode_putfh_maxsz + \
 777                                  encode_lookup_maxsz + \
 778                                  encode_fs_locations_maxsz + \
 779                                  encode_renew_maxsz)
 780 #define NFS4_dec_fs_locations_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_sequence_maxsz + \
 783                                  decode_putfh_maxsz + \
 784                                  decode_lookup_maxsz + \
 785                                  decode_fs_locations_maxsz + \
 786                                  decode_renew_maxsz)
 787 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 788                                 encode_sequence_maxsz + \
 789                                 encode_putfh_maxsz + \
 790                                 encode_secinfo_maxsz)
 791 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 792                                 decode_sequence_maxsz + \
 793                                 decode_putfh_maxsz + \
 794                                 decode_secinfo_maxsz)
 795 #define NFS4_enc_fsid_present_sz \
 796                                 (compound_encode_hdr_maxsz + \
 797                                  encode_sequence_maxsz + \
 798                                  encode_putfh_maxsz + \
 799                                  encode_getfh_maxsz + \
 800                                  encode_renew_maxsz)
 801 #define NFS4_dec_fsid_present_sz \
 802                                 (compound_decode_hdr_maxsz + \
 803                                  decode_sequence_maxsz + \
 804                                  decode_putfh_maxsz + \
 805                                  decode_getfh_maxsz + \
 806                                  decode_renew_maxsz)
 807 #if defined(CONFIG_NFS_V4_1)
 808 #define NFS4_enc_bind_conn_to_session_sz \
 809                                 (compound_encode_hdr_maxsz + \
 810                                  encode_bind_conn_to_session_maxsz)
 811 #define NFS4_dec_bind_conn_to_session_sz \
 812                                 (compound_decode_hdr_maxsz + \
 813                                  decode_bind_conn_to_session_maxsz)
 814 #define NFS4_enc_exchange_id_sz \
 815                                 (compound_encode_hdr_maxsz + \
 816                                  encode_exchange_id_maxsz)
 817 #define NFS4_dec_exchange_id_sz \
 818                                 (compound_decode_hdr_maxsz + \
 819                                  decode_exchange_id_maxsz)
 820 #define NFS4_enc_create_session_sz \
 821                                 (compound_encode_hdr_maxsz + \
 822                                  encode_create_session_maxsz)
 823 #define NFS4_dec_create_session_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_create_session_maxsz)
 826 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 827                                          encode_destroy_session_maxsz)
 828 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 829                                          decode_destroy_session_maxsz)
 830 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 831                                          encode_destroy_clientid_maxsz)
 832 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 833                                          decode_destroy_clientid_maxsz)
 834 #define NFS4_enc_sequence_sz \
 835                                 (compound_decode_hdr_maxsz + \
 836                                  encode_sequence_maxsz)
 837 #define NFS4_dec_sequence_sz \
 838                                 (compound_decode_hdr_maxsz + \
 839                                  decode_sequence_maxsz)
 840 #endif
 841 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 842                                          encode_sequence_maxsz + \
 843                                          encode_putrootfh_maxsz + \
 844                                          encode_fsinfo_maxsz)
 845 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 846                                          decode_sequence_maxsz + \
 847                                          decode_putrootfh_maxsz + \
 848                                          decode_fsinfo_maxsz)
 849 #if defined(CONFIG_NFS_V4_1)
 850 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 851                                          encode_sequence_maxsz + \
 852                                          encode_reclaim_complete_maxsz)
 853 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 854                                          decode_sequence_maxsz + \
 855                                          decode_reclaim_complete_maxsz)
 856 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 857                                 encode_sequence_maxsz +\
 858                                 encode_getdeviceinfo_maxsz)
 859 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 860                                 decode_sequence_maxsz + \
 861                                 decode_getdeviceinfo_maxsz)
 862 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 863                                 encode_sequence_maxsz + \
 864                                 encode_putfh_maxsz +        \
 865                                 encode_layoutget_maxsz)
 866 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 867                                 decode_sequence_maxsz + \
 868                                 decode_putfh_maxsz +        \
 869                                 decode_layoutget_maxsz)
 870 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 871                                 encode_sequence_maxsz +\
 872                                 encode_putfh_maxsz + \
 873                                 encode_layoutcommit_maxsz + \
 874                                 encode_getattr_maxsz)
 875 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 876                                 decode_sequence_maxsz + \
 877                                 decode_putfh_maxsz + \
 878                                 decode_layoutcommit_maxsz + \
 879                                 decode_getattr_maxsz)
 880 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 881                                 encode_sequence_maxsz + \
 882                                 encode_putfh_maxsz + \
 883                                 encode_layoutreturn_maxsz)
 884 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 885                                 decode_sequence_maxsz + \
 886                                 decode_putfh_maxsz + \
 887                                 decode_layoutreturn_maxsz)
 888 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 889                                         encode_sequence_maxsz + \
 890                                         encode_putrootfh_maxsz +\
 891                                         encode_secinfo_no_name_maxsz)
 892 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 893                                         decode_sequence_maxsz + \
 894                                         decode_putrootfh_maxsz + \
 895                                         decode_secinfo_no_name_maxsz)
 896 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 897                                          encode_sequence_maxsz + \
 898                                          encode_test_stateid_maxsz)
 899 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 900                                          decode_sequence_maxsz + \
 901                                          decode_test_stateid_maxsz)
 902 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 903                                          encode_sequence_maxsz + \
 904                                          encode_free_stateid_maxsz)
 905 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 906                                          decode_sequence_maxsz + \
 907                                          decode_free_stateid_maxsz)
 908
 909 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 910                                       compound_encode_hdr_maxsz +
 911                                       encode_sequence_maxsz +
 912                                       encode_putfh_maxsz +
 913                                       encode_getattr_maxsz) *
 914                                      XDR_UNIT);
 915
 916 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 917                                      compound_decode_hdr_maxsz +
 918                                      decode_sequence_maxsz +
 919                                      decode_putfh_maxsz) *
 920                                     XDR_UNIT);
 921
 922 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 923                                            compound_decode_hdr_maxsz +
 924                                            decode_sequence_maxsz) *
 925                                           XDR_UNIT);
 926 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 927 #endif /* CONFIG_NFS_V4_1 */
 928
 929 static const umode_t nfs_type2fmt[] = {
 930         [NF4BAD] = 0,
 931         [NF4REG] = S_IFREG,
 932         [NF4DIR] = S_IFDIR,
 933         [NF4BLK] = S_IFBLK,
 934         [NF4CHR] = S_IFCHR,
 935         [NF4LNK] = S_IFLNK,
 936         [NF4SOCK] = S_IFSOCK,
 937         [NF4FIFO] = S_IFIFO,
 938         [NF4ATTRDIR] = 0,
 939         [NF4NAMEDATTR] = 0,
 940 };
 941
 942 struct compound_hdr {
 943         int32_t         status;
 944         uint32_t        nops;
 945         __be32 *        nops_p;
 946         uint32_t        taglen;
 947         char *          tag;
 948         uint32_t        replen;         /* expected reply words */
 949         u32             minorversion;
 950 };
 951
 952 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 953 {
 954         __be32 *p = xdr_reserve_space(xdr, nbytes);
 955         BUG_ON(!p);
 956         return p;
 957 }
 958
 959 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 960 {
 961         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 962 }
 963
 964 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 965 {
 966         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 967 }
 968
 969 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 970 {
 971         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 972 }
 973
 974 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 975 {
 976         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 977 }
 978
 979 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 980                 const __u32 *bitmap, size_t len)
 981 {
 982         ssize_t ret;
 983
 984         /* Trim empty words */
 985         while (len > 0 && bitmap[len-1] == 0)
 986                 len--;
 987         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 988         if (WARN_ON_ONCE(ret < 0))
 989                 return ret;
 990         return len;
 991 }
 992
 993 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 994                 __u32 *res, size_t len)
 995 {
 996         size_t i;
 997         __u32 tmp;
 998
 999         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000                 len--;
1001         for (i = len; i-- > 0;) {
1002                 tmp = bitmap[i] & mask[i];
1003                 res[i] = tmp;
1004         }
1005         return len;
1006 }
1007
1008 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009                 const struct nfs_seqid *seqid)
1010 {
1011         if (seqid != NULL)
1012                 encode_uint32(xdr, seqid->sequence->counter);
1013         else
1014                 encode_uint32(xdr, 0);
1015 }
1016
1017 static void encode_compound_hdr(struct xdr_stream *xdr,
1018                                 struct rpc_rqst *req,
1019                                 struct compound_hdr *hdr)
1020 {
1021         __be32 *p;
1022
1023         /* initialize running count of expected bytes in reply.
1024          * NOTE: the replied tag SHOULD be the same is the one sent,
1025          * but this is not required as a MUST for the server to do so. */
1026         hdr->replen = 3 + hdr->taglen;
1027
1028         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029         encode_string(xdr, hdr->taglen, hdr->tag);
1030         p = reserve_space(xdr, 8);
1031         *p++ = cpu_to_be32(hdr->minorversion);
1032         hdr->nops_p = p;
1033         *p = cpu_to_be32(hdr->nops);
1034 }
1035
1036 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037                 uint32_t replen,
1038                 struct compound_hdr *hdr)
1039 {
1040         encode_uint32(xdr, op);
1041         hdr->nops++;
1042         hdr->replen += replen;
1043 }
1044
1045 static void encode_nops(struct compound_hdr *hdr)
1046 {
1047         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048         *hdr->nops_p = htonl(hdr->nops);
1049 }
1050
1051 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052 {
1053         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054 }
1055
1056 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057 {
1058         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059 }
1060
1061 static __be32 *
1062 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1063 {
1064         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1065         *p++ = cpu_to_be32(t->tv_nsec);
1066         return p;
1067 }
1068
1069 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070                                 const struct nfs4_label *label,
1071                                 const umode_t *umask,
1072                                 const struct nfs_server *server,
1073                                 const uint32_t attrmask[])
1074 {
1075         struct timespec ts;
1076         char owner_name[IDMAP_NAMESZ];
1077         char owner_group[IDMAP_NAMESZ];
1078         int owner_namelen = 0;
1079         int owner_grouplen = 0;
1080         __be32 *p;
1081         uint32_t len = 0;
1082         uint32_t bmval[3] = { 0 };
1083
1084         /*
1085          * We reserve enough space to write the entire attribute buffer at once.
1086          */
1087         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1088                 bmval[0] |= FATTR4_WORD0_SIZE;
1089                 len += 8;
1090         }
1091         if (iap->ia_valid & ATTR_MODE) {
1092                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1093                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1094                         len += 8;
1095                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1096                         bmval[1] |= FATTR4_WORD1_MODE;
1097                         len += 4;
1098                 }
1099         }
1100         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1101                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1102                 if (owner_namelen < 0) {
1103                         dprintk("nfs: couldn't resolve uid %d to string\n",
1104                                         from_kuid(&init_user_ns, iap->ia_uid));
1105                         /* XXX */
1106                         strcpy(owner_name, "nobody");
1107                         owner_namelen = sizeof("nobody") - 1;
1108                         /* goto out; */
1109                 }
1110                 bmval[1] |= FATTR4_WORD1_OWNER;
1111                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1112         }
1113         if ((iap->ia_valid & ATTR_GID) &&
1114            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1115                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1116                 if (owner_grouplen < 0) {
1117                         dprintk("nfs: couldn't resolve gid %d to string\n",
1118                                         from_kgid(&init_user_ns, iap->ia_gid));
1119                         strcpy(owner_group, "nobody");
1120                         owner_grouplen = sizeof("nobody") - 1;
1121                         /* goto out; */
1122                 }
1123                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1124                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1125         }
1126         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1127                 if (iap->ia_valid & ATTR_ATIME_SET) {
1128                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129                         len += 4 + (nfstime4_maxsz << 2);
1130                 } else if (iap->ia_valid & ATTR_ATIME) {
1131                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1132                         len += 4;
1133                 }
1134         }
1135         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1136                 if (iap->ia_valid & ATTR_MTIME_SET) {
1137                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138                         len += 4 + (nfstime4_maxsz << 2);
1139                 } else if (iap->ia_valid & ATTR_MTIME) {
1140                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1141                         len += 4;
1142                 }
1143         }
1144
1145         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1146                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1147                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1148         }
1149
1150         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1151         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1152
1153         if (bmval[0] & FATTR4_WORD0_SIZE)
1154                 p = xdr_encode_hyper(p, iap->ia_size);
1155         if (bmval[1] & FATTR4_WORD1_MODE)
1156                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1157         if (bmval[1] & FATTR4_WORD1_OWNER)
1158                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1159         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1160                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1161         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1162                 if (iap->ia_valid & ATTR_ATIME_SET) {
1163                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1164                         ts = timespec64_to_timespec(iap->ia_atime);
1165                         p = xdr_encode_nfstime4(p, &ts);
1166                 } else
1167                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168         }
1169         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170                 if (iap->ia_valid & ATTR_MTIME_SET) {
1171                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172                         ts = timespec64_to_timespec(iap->ia_mtime);
1173                         p = xdr_encode_nfstime4(p, &ts);
1174                 } else
1175                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1176         }
1177         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1178                 *p++ = cpu_to_be32(label->lfs);
1179                 *p++ = cpu_to_be32(label->pi);
1180                 *p++ = cpu_to_be32(label->len);
1181                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1182         }
1183         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1184                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1185                 *p++ = cpu_to_be32(*umask);
1186         }
1187
1188 /* out: */
1189 }
1190
1191 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1192 {
1193         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1194         encode_uint32(xdr, access);
1195 }
1196
1197 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1198 {
1199         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1200         encode_nfs4_seqid(xdr, arg->seqid);
1201         encode_nfs4_stateid(xdr, &arg->stateid);
1202 }
1203
1204 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1205 {
1206         __be32 *p;
1207
1208         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1209         p = reserve_space(xdr, 12);
1210         p = xdr_encode_hyper(p, args->offset);
1211         *p = cpu_to_be32(args->count);
1212 }
1213
1214 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1215 {
1216         __be32 *p;
1217
1218         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1219         encode_uint32(xdr, create->ftype);
1220
1221         switch (create->ftype) {
1222         case NF4LNK:
1223                 p = reserve_space(xdr, 4);
1224                 *p = cpu_to_be32(create->u.symlink.len);
1225                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1226                                 create->u.symlink.len);
1227                 xdr->buf->flags |= XDRBUF_WRITE;
1228                 break;
1229
1230         case NF4BLK: case NF4CHR:
1231                 p = reserve_space(xdr, 8);
1232                 *p++ = cpu_to_be32(create->u.device.specdata1);
1233                 *p = cpu_to_be32(create->u.device.specdata2);
1234                 break;
1235
1236         default:
1237                 break;
1238         }
1239
1240         encode_string(xdr, create->name->len, create->name->name);
1241         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1242                         create->server, create->server->attr_bitmask);
1243 }
1244
1245 static void encode_getattr(struct xdr_stream *xdr,
1246                 const __u32 *bitmap, const __u32 *mask, size_t len,
1247                 struct compound_hdr *hdr)
1248 {
1249         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1250
1251         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1252         if (mask) {
1253                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1254                         len = ARRAY_SIZE(masked_bitmap);
1255                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1256                 bitmap = masked_bitmap;
1257         }
1258         xdr_encode_bitmap4(xdr, bitmap, len);
1259 }
1260
1261 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1262 {
1263         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1264                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1265 }
1266
1267 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1268                                  const u32 *open_bitmap,
1269                                  struct compound_hdr *hdr)
1270 {
1271         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1272 }
1273
1274 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1275 {
1276         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1277                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1283                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294         encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299         if (fl->fl_type == F_RDLCK)
1300                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306         if (fl->fl_end == OFFSET_MAX)
1307                 return ~(uint64_t)0;
1308         return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313         __be32 *p;
1314
1315         p = reserve_space(xdr, 32);
1316         p = xdr_encode_hyper(p, lowner->clientid);
1317         *p++ = cpu_to_be32(20);
1318         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319         *p++ = cpu_to_be32(lowner->s_dev);
1320         xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326  */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329         __be32 *p;
1330
1331         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332         p = reserve_space(xdr, 28);
1333         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334         *p++ = cpu_to_be32(args->reclaim);
1335         p = xdr_encode_hyper(p, args->fl->fl_start);
1336         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337         *p = cpu_to_be32(args->new_lock_owner);
1338         if (args->new_lock_owner){
1339                 encode_nfs4_seqid(xdr, args->open_seqid);
1340                 encode_nfs4_stateid(xdr, &args->open_stateid);
1341                 encode_nfs4_seqid(xdr, args->lock_seqid);
1342                 encode_lockowner(xdr, &args->lock_owner);
1343         }
1344         else {
1345                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                 encode_nfs4_seqid(xdr, args->lock_seqid);
1347         }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352         __be32 *p;
1353
1354         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355         p = reserve_space(xdr, 20);
1356         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357         p = xdr_encode_hyper(p, args->fl->fl_start);
1358         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359         encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368         encode_nfs4_seqid(xdr, args->seqid);
1369         encode_nfs4_stateid(xdr, &args->stateid);
1370         p = reserve_space(xdr, 16);
1371         p = xdr_encode_hyper(p, args->fl->fl_start);
1372         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378         encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384         encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1388 {
1389         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1390 }
1391
1392 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1393 {
1394         __be32 *p;
1395
1396         p = reserve_space(xdr, 8);
1397         *p++ = cpu_to_be32(share_access);
1398         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1399 }
1400
1401 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402 {
1403         __be32 *p;
1404  /*
1405  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1406  * owner 4 = 32
1407  */
1408         encode_nfs4_seqid(xdr, arg->seqid);
1409         encode_share_access(xdr, arg->share_access);
1410         p = reserve_space(xdr, 36);
1411         p = xdr_encode_hyper(p, arg->clientid);
1412         *p++ = cpu_to_be32(24);
1413         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1414         *p++ = cpu_to_be32(arg->server->s_dev);
1415         *p++ = cpu_to_be32(arg->id.uniquifier);
1416         xdr_encode_hyper(p, arg->id.create_time);
1417 }
1418
1419 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1420 {
1421         __be32 *p;
1422
1423         p = reserve_space(xdr, 4);
1424         switch(arg->createmode) {
1425         case NFS4_CREATE_UNCHECKED:
1426                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1427                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1428                                 arg->server, arg->server->attr_bitmask);
1429                 break;
1430         case NFS4_CREATE_GUARDED:
1431                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1432                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1433                                 arg->server, arg->server->attr_bitmask);
1434                 break;
1435         case NFS4_CREATE_EXCLUSIVE:
1436                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1437                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1438                 break;
1439         case NFS4_CREATE_EXCLUSIVE4_1:
1440                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1441                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1442                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1443                                 arg->server, arg->server->exclcreat_bitmask);
1444         }
1445 }
1446
1447 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1448 {
1449         __be32 *p;
1450
1451         p = reserve_space(xdr, 4);
1452         switch (arg->open_flags & O_CREAT) {
1453         case 0:
1454                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1455                 break;
1456         default:
1457                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1458                 encode_createmode(xdr, arg);
1459         }
1460 }
1461
1462 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1463 {
1464         __be32 *p;
1465
1466         p = reserve_space(xdr, 4);
1467         switch (delegation_type) {
1468         case 0:
1469                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1470                 break;
1471         case FMODE_READ:
1472                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1473                 break;
1474         case FMODE_WRITE|FMODE_READ:
1475                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1476                 break;
1477         default:
1478                 BUG();
1479         }
1480 }
1481
1482 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1488         encode_string(xdr, name->len, name->name);
1489 }
1490
1491 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 4);
1496         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1497         encode_delegation_type(xdr, type);
1498 }
1499
1500 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4);
1505         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1506         encode_nfs4_stateid(xdr, stateid);
1507         encode_string(xdr, name->len, name->name);
1508 }
1509
1510 static inline void encode_claim_fh(struct xdr_stream *xdr)
1511 {
1512         __be32 *p;
1513
1514         p = reserve_space(xdr, 4);
1515         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1516 }
1517
1518 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1519 {
1520         __be32 *p;
1521
1522         p = reserve_space(xdr, 4);
1523         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524         encode_nfs4_stateid(xdr, stateid);
1525 }
1526
1527 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1528 {
1529         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1530         encode_openhdr(xdr, arg);
1531         encode_opentype(xdr, arg);
1532         switch (arg->claim) {
1533         case NFS4_OPEN_CLAIM_NULL:
1534                 encode_claim_null(xdr, arg->name);
1535                 break;
1536         case NFS4_OPEN_CLAIM_PREVIOUS:
1537                 encode_claim_previous(xdr, arg->u.delegation_type);
1538                 break;
1539         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1540                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1541                 break;
1542         case NFS4_OPEN_CLAIM_FH:
1543                 encode_claim_fh(xdr);
1544                 break;
1545         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1546                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1547                 break;
1548         default:
1549                 BUG();
1550         }
1551 }
1552
1553 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1554 {
1555         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1556         encode_nfs4_stateid(xdr, arg->stateid);
1557         encode_nfs4_seqid(xdr, arg->seqid);
1558 }
1559
1560 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1561 {
1562         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1563         encode_nfs4_stateid(xdr, &arg->stateid);
1564         encode_nfs4_seqid(xdr, arg->seqid);
1565         encode_share_access(xdr, arg->share_access);
1566 }
1567
1568 static void
1569 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1570 {
1571         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1572         encode_string(xdr, fh->size, fh->data);
1573 }
1574
1575 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1576 {
1577         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1578 }
1579
1580 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1581                         struct compound_hdr *hdr)
1582 {
1583         __be32 *p;
1584
1585         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1586         encode_nfs4_stateid(xdr, &args->stateid);
1587
1588         p = reserve_space(xdr, 12);
1589         p = xdr_encode_hyper(p, args->offset);
1590         *p = cpu_to_be32(args->count);
1591 }
1592
1593 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1594 {
1595         uint32_t attrs[3] = {
1596                 FATTR4_WORD0_RDATTR_ERROR,
1597                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1598         };
1599         uint32_t dircount = readdir->count >> 1;
1600         __be32 *p, verf[2];
1601         uint32_t attrlen = 0;
1602         unsigned int i;
1603
1604         if (readdir->plus) {
1605                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1606                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1607                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1608                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1609                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1610                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1611                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1612                 dircount >>= 1;
1613         }
1614         /* Use mounted_on_fileid only if the server supports it */
1615         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1616                 attrs[0] |= FATTR4_WORD0_FILEID;
1617         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1618                 attrs[i] &= readdir->bitmask[i];
1619                 if (attrs[i] != 0)
1620                         attrlen = i+1;
1621         }
1622
1623         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1624         encode_uint64(xdr, readdir->cookie);
1625         encode_nfs4_verifier(xdr, &readdir->verifier);
1626         p = reserve_space(xdr, 12 + (attrlen << 2));
1627         *p++ = cpu_to_be32(dircount);
1628         *p++ = cpu_to_be32(readdir->count);
1629         *p++ = cpu_to_be32(attrlen);
1630         for (i = 0; i < attrlen; i++)
1631                 *p++ = cpu_to_be32(attrs[i]);
1632         memcpy(verf, readdir->verifier.data, sizeof(verf));
1633
1634         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1635                         __func__,
1636                         (unsigned long long)readdir->cookie,
1637                         verf[0], verf[1],
1638                         attrs[0] & readdir->bitmask[0],
1639                         attrs[1] & readdir->bitmask[1],
1640                         attrs[2] & readdir->bitmask[2]);
1641 }
1642
1643 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1646 }
1647
1648 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1649 {
1650         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1651         encode_string(xdr, name->len, name->name);
1652 }
1653
1654 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1655 {
1656         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1657         encode_string(xdr, oldname->len, oldname->name);
1658         encode_string(xdr, newname->len, newname->name);
1659 }
1660
1661 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1662                          struct compound_hdr *hdr)
1663 {
1664         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1665         encode_uint64(xdr, clid);
1666 }
1667
1668 static void
1669 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1672 }
1673
1674 static void
1675 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1676                 struct compound_hdr *hdr)
1677 {
1678         __be32 *p;
1679
1680         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1681         encode_nfs4_stateid(xdr, &zero_stateid);
1682         p = reserve_space(xdr, 2*4);
1683         *p++ = cpu_to_be32(1);
1684         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1685         p = reserve_space(xdr, 4);
1686         *p = cpu_to_be32(arg->acl_len);
1687         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1688 }
1689
1690 static void
1691 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1692 {
1693         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1694 }
1695
1696 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1697 {
1698         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1699         encode_nfs4_stateid(xdr, &arg->stateid);
1700         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1701                         server->attr_bitmask);
1702 }
1703
1704 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1705 {
1706         __be32 *p;
1707
1708         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1709         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1710
1711         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1712                         setclientid->sc_clnt->cl_owner_id);
1713         p = reserve_space(xdr, 4);
1714         *p = cpu_to_be32(setclientid->sc_prog);
1715         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1716         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1717         p = reserve_space(xdr, 4);
1718         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1719 }
1720
1721 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1722 {
1723         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1724                         decode_setclientid_confirm_maxsz, hdr);
1725         encode_uint64(xdr, arg->clientid);
1726         encode_nfs4_verifier(xdr, &arg->confirm);
1727 }
1728
1729 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1730                          struct compound_hdr *hdr)
1731 {
1732         __be32 *p;
1733
1734         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1735         encode_nfs4_stateid(xdr, &args->stateid);
1736
1737         p = reserve_space(xdr, 16);
1738         p = xdr_encode_hyper(p, args->offset);
1739         *p++ = cpu_to_be32(args->stable);
1740         *p = cpu_to_be32(args->count);
1741
1742         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1743 }
1744
1745 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1746 {
1747         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1748         encode_nfs4_stateid(xdr, stateid);
1749 }
1750
1751 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1752 {
1753         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1754         encode_string(xdr, name->len, name->name);
1755 }
1756
1757 #if defined(CONFIG_NFS_V4_1)
1758 /* NFSv4.1 operations */
1759 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1760                                    const struct nfs41_bind_conn_to_session_args *args,
1761                                    struct compound_hdr *hdr)
1762 {
1763         __be32 *p;
1764
1765         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1766                 decode_bind_conn_to_session_maxsz, hdr);
1767         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1768         p = xdr_reserve_space(xdr, 8);
1769         *p++ = cpu_to_be32(args->dir);
1770         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1771 }
1772
1773 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1774 {
1775         unsigned int i;
1776         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1777         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1778                 encode_uint32(xdr, op_map->u.words[i]);
1779 }
1780
1781 static void encode_exchange_id(struct xdr_stream *xdr,
1782                                const struct nfs41_exchange_id_args *args,
1783                                struct compound_hdr *hdr)
1784 {
1785         __be32 *p;
1786         char impl_name[IMPL_NAME_LIMIT];
1787         int len = 0;
1788
1789         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1790         encode_nfs4_verifier(xdr, &args->verifier);
1791
1792         encode_string(xdr, strlen(args->client->cl_owner_id),
1793                         args->client->cl_owner_id);
1794
1795         encode_uint32(xdr, args->flags);
1796         encode_uint32(xdr, args->state_protect.how);
1797
1798         switch (args->state_protect.how) {
1799         case SP4_NONE:
1800                 break;
1801         case SP4_MACH_CRED:
1802                 encode_op_map(xdr, &args->state_protect.enforce);
1803                 encode_op_map(xdr, &args->state_protect.allow);
1804                 break;
1805         default:
1806                 WARN_ON_ONCE(1);
1807                 break;
1808         }
1809
1810         if (send_implementation_id &&
1811             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1812             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1813                 <= sizeof(impl_name) + 1)
1814                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1815                                utsname()->sysname, utsname()->release,
1816                                utsname()->version, utsname()->machine);
1817
1818         if (len > 0) {
1819                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1820
1821                 encode_string(xdr,
1822                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1823                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1824                 encode_string(xdr, len, impl_name);
1825                 /* just send zeros for nii_date - the date is in nii_name */
1826                 p = reserve_space(xdr, 12);
1827                 p = xdr_encode_hyper(p, 0);
1828                 *p = cpu_to_be32(0);
1829         } else
1830                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1831 }
1832
1833 static void encode_create_session(struct xdr_stream *xdr,
1834                                   const struct nfs41_create_session_args *args,
1835                                   struct compound_hdr *hdr)
1836 {
1837         __be32 *p;
1838         struct nfs_client *clp = args->client;
1839         struct rpc_clnt *clnt = clp->cl_rpcclient;
1840         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1841         u32 max_resp_sz_cached;
1842
1843         /*
1844          * Assumes OPEN is the biggest non-idempotent compound.
1845          * 2 is the verifier.
1846          */
1847         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1848                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1849
1850         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1851         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1852         p = xdr_encode_hyper(p, args->clientid);
1853         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1854         *p++ = cpu_to_be32(args->flags);                        /*flags */
1855
1856         /* Fore Channel */
1857         *p++ = cpu_to_be32(0);                          /* header padding size */
1858         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1859         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1860         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1861         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1862         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1863         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1864
1865         /* Back Channel */
1866         *p++ = cpu_to_be32(0);                          /* header padding size */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1869         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1870         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1871         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1872         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1873
1874         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1875         *p++ = cpu_to_be32(1);
1876         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1877
1878         /* authsys_parms rfc1831 */
1879         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1880         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1881         *p++ = cpu_to_be32(0);                          /* UID */
1882         *p++ = cpu_to_be32(0);                          /* GID */
1883         *p = cpu_to_be32(0);                            /* No more gids */
1884 }
1885
1886 static void encode_destroy_session(struct xdr_stream *xdr,
1887                                    const struct nfs4_session *session,
1888                                    struct compound_hdr *hdr)
1889 {
1890         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1891         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1892 }
1893
1894 static void encode_destroy_clientid(struct xdr_stream *xdr,
1895                                    uint64_t clientid,
1896                                    struct compound_hdr *hdr)
1897 {
1898         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1899         encode_uint64(xdr, clientid);
1900 }
1901
1902 static void encode_reclaim_complete(struct xdr_stream *xdr,
1903                                     const struct nfs41_reclaim_complete_args *args,
1904                                     struct compound_hdr *hdr)
1905 {
1906         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1907         encode_uint32(xdr, args->one_fs);
1908 }
1909 #endif /* CONFIG_NFS_V4_1 */
1910
1911 static void encode_sequence(struct xdr_stream *xdr,
1912                             const struct nfs4_sequence_args *args,
1913                             struct compound_hdr *hdr)
1914 {
1915 #if defined(CONFIG_NFS_V4_1)
1916         struct nfs4_session *session;
1917         struct nfs4_slot_table *tp;
1918         struct nfs4_slot *slot = args->sa_slot;
1919         __be32 *p;
1920
1921         tp = slot->table;
1922         session = tp->session;
1923         if (!session)
1924                 return;
1925
1926         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1927
1928         /*
1929          * Sessionid + seqid + slotid + max slotid + cache_this
1930          */
1931         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1932                 "max_slotid=%d cache_this=%d\n",
1933                 __func__,
1934                 ((u32 *)session->sess_id.data)[0],
1935                 ((u32 *)session->sess_id.data)[1],
1936                 ((u32 *)session->sess_id.data)[2],
1937                 ((u32 *)session->sess_id.data)[3],
1938                 slot->seq_nr, slot->slot_nr,
1939                 tp->highest_used_slotid, args->sa_cache_this);
1940         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1941         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1942         *p++ = cpu_to_be32(slot->seq_nr);
1943         *p++ = cpu_to_be32(slot->slot_nr);
1944         *p++ = cpu_to_be32(tp->highest_used_slotid);
1945         *p = cpu_to_be32(args->sa_cache_this);
1946 #endif /* CONFIG_NFS_V4_1 */
1947 }
1948
1949 #ifdef CONFIG_NFS_V4_1
1950 static void
1951 encode_getdeviceinfo(struct xdr_stream *xdr,
1952                      const struct nfs4_getdeviceinfo_args *args,
1953                      struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1958         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1959         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1960                                     NFS4_DEVICEID4_SIZE);
1961         *p++ = cpu_to_be32(args->pdev->layout_type);
1962         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1963
1964         p = reserve_space(xdr, 4 + 4);
1965         *p++ = cpu_to_be32(1);                  /* bitmap length */
1966         *p++ = cpu_to_be32(args->notify_types);
1967 }
1968
1969 static void
1970 encode_layoutget(struct xdr_stream *xdr,
1971                       const struct nfs4_layoutget_args *args,
1972                       struct compound_hdr *hdr)
1973 {
1974         __be32 *p;
1975
1976         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1977         p = reserve_space(xdr, 36);
1978         *p++ = cpu_to_be32(0);     /* Signal layout available */
1979         *p++ = cpu_to_be32(args->type);
1980         *p++ = cpu_to_be32(args->range.iomode);
1981         p = xdr_encode_hyper(p, args->range.offset);
1982         p = xdr_encode_hyper(p, args->range.length);
1983         p = xdr_encode_hyper(p, args->minlength);
1984         encode_nfs4_stateid(xdr, &args->stateid);
1985         encode_uint32(xdr, args->maxcount);
1986
1987         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1988                 __func__,
1989                 args->type,
1990                 args->range.iomode,
1991                 (unsigned long)args->range.offset,
1992                 (unsigned long)args->range.length,
1993                 args->maxcount);
1994 }
1995
1996 static int
1997 encode_layoutcommit(struct xdr_stream *xdr,
1998                     struct inode *inode,
1999                     const struct nfs4_layoutcommit_args *args,
2000                     struct compound_hdr *hdr)
2001 {
2002         __be32 *p;
2003
2004         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2005                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2006
2007         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2008         p = reserve_space(xdr, 20);
2009         /* Only whole file layouts */
2010         p = xdr_encode_hyper(p, 0); /* offset */
2011         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2012         *p = cpu_to_be32(0); /* reclaim */
2013         encode_nfs4_stateid(xdr, &args->stateid);
2014         if (args->lastbytewritten != U64_MAX) {
2015                 p = reserve_space(xdr, 20);
2016                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2017                 p = xdr_encode_hyper(p, args->lastbytewritten);
2018         } else {
2019                 p = reserve_space(xdr, 12);
2020                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2021         }
2022         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2023         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2024
2025         encode_uint32(xdr, args->layoutupdate_len);
2026         if (args->layoutupdate_pages)
2027                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2028                                 args->layoutupdate_len);
2029
2030         return 0;
2031 }
2032
2033 static void
2034 encode_layoutreturn(struct xdr_stream *xdr,
2035                     const struct nfs4_layoutreturn_args *args,
2036                     struct compound_hdr *hdr)
2037 {
2038         __be32 *p;
2039
2040         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041         p = reserve_space(xdr, 16);
2042         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043         *p++ = cpu_to_be32(args->layout_type);
2044         *p++ = cpu_to_be32(args->range.iomode);
2045         *p = cpu_to_be32(RETURN_FILE);
2046         p = reserve_space(xdr, 16);
2047         p = xdr_encode_hyper(p, args->range.offset);
2048         p = xdr_encode_hyper(p, args->range.length);
2049         spin_lock(&args->inode->i_lock);
2050         encode_nfs4_stateid(xdr, &args->stateid);
2051         spin_unlock(&args->inode->i_lock);
2052         if (args->ld_private->ops && args->ld_private->ops->encode)
2053                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054         else
2055                 encode_uint32(xdr, 0);
2056 }
2057
2058 static int
2059 encode_secinfo_no_name(struct xdr_stream *xdr,
2060                        const struct nfs41_secinfo_no_name_args *args,
2061                        struct compound_hdr *hdr)
2062 {
2063         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2064         encode_uint32(xdr, args->style);
2065         return 0;
2066 }
2067
2068 static void encode_test_stateid(struct xdr_stream *xdr,
2069                                 const struct nfs41_test_stateid_args *args,
2070                                 struct compound_hdr *hdr)
2071 {
2072         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2073         encode_uint32(xdr, 1);
2074         encode_nfs4_stateid(xdr, args->stateid);
2075 }
2076
2077 static void encode_free_stateid(struct xdr_stream *xdr,
2078                                 const struct nfs41_free_stateid_args *args,
2079                                 struct compound_hdr *hdr)
2080 {
2081         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2082         encode_nfs4_stateid(xdr, &args->stateid);
2083 }
2084 #else
2085 static inline void
2086 encode_layoutreturn(struct xdr_stream *xdr,
2087                     const struct nfs4_layoutreturn_args *args,
2088                     struct compound_hdr *hdr)
2089 {
2090 }
2091
2092 static void
2093 encode_layoutget(struct xdr_stream *xdr,
2094                       const struct nfs4_layoutget_args *args,
2095                       struct compound_hdr *hdr)
2096 {
2097 }
2098 #endif /* CONFIG_NFS_V4_1 */
2099
2100 /*
2101  * END OF "GENERIC" ENCODE ROUTINES.
2102  */
2103
2104 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2105 {
2106 #if defined(CONFIG_NFS_V4_1)
2107         struct nfs4_session *session = args->sa_slot->table->session;
2108         if (session)
2109                 return session->clp->cl_mvops->minor_version;
2110 #endif /* CONFIG_NFS_V4_1 */
2111         return 0;
2112 }
2113
2114 /*
2115  * Encode an ACCESS request
2116  */
2117 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2118                                 const void *data)
2119 {
2120         const struct nfs4_accessargs *args = data;
2121         struct compound_hdr hdr = {
2122                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123         };
2124
2125         encode_compound_hdr(xdr, req, &hdr);
2126         encode_sequence(xdr, &args->seq_args, &hdr);
2127         encode_putfh(xdr, args->fh, &hdr);
2128         encode_access(xdr, args->access, &hdr);
2129         if (args->bitmask)
2130                 encode_getfattr(xdr, args->bitmask, &hdr);
2131         encode_nops(&hdr);
2132 }
2133
2134 /*
2135  * Encode LOOKUP request
2136  */
2137 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2138                                 const void *data)
2139 {
2140         const struct nfs4_lookup_arg *args = data;
2141         struct compound_hdr hdr = {
2142                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2143         };
2144
2145         encode_compound_hdr(xdr, req, &hdr);
2146         encode_sequence(xdr, &args->seq_args, &hdr);
2147         encode_putfh(xdr, args->dir_fh, &hdr);
2148         encode_lookup(xdr, args->name, &hdr);
2149         encode_getfh(xdr, &hdr);
2150         encode_getfattr(xdr, args->bitmask, &hdr);
2151         encode_nops(&hdr);
2152 }
2153
2154 /*
2155  * Encode LOOKUPP request
2156  */
2157 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2158                 const void *data)
2159 {
2160         const struct nfs4_lookupp_arg *args = data;
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_lookupp(xdr, &hdr);
2169         encode_getfh(xdr, &hdr);
2170         encode_getfattr(xdr, args->bitmask, &hdr);
2171         encode_nops(&hdr);
2172 }
2173
2174 /*
2175  * Encode LOOKUP_ROOT request
2176  */
2177 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2178                                      struct xdr_stream *xdr,
2179                                      const void *data)
2180 {
2181         const struct nfs4_lookup_root_arg *args = data;
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         encode_compound_hdr(xdr, req, &hdr);
2187         encode_sequence(xdr, &args->seq_args, &hdr);
2188         encode_putrootfh(xdr, &hdr);
2189         encode_getfh(xdr, &hdr);
2190         encode_getfattr(xdr, args->bitmask, &hdr);
2191         encode_nops(&hdr);
2192 }
2193
2194 /*
2195  * Encode REMOVE request
2196  */
2197 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                                 const void *data)
2199 {
2200         const struct nfs_removeargs *args = data;
2201         struct compound_hdr hdr = {
2202                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_sequence(xdr, &args->seq_args, &hdr);
2207         encode_putfh(xdr, args->fh, &hdr);
2208         encode_remove(xdr, &args->name, &hdr);
2209         encode_nops(&hdr);
2210 }
2211
2212 /*
2213  * Encode RENAME request
2214  */
2215 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                                 const void *data)
2217 {
2218         const struct nfs_renameargs *args = data;
2219         struct compound_hdr hdr = {
2220                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221         };
2222
2223         encode_compound_hdr(xdr, req, &hdr);
2224         encode_sequence(xdr, &args->seq_args, &hdr);
2225         encode_putfh(xdr, args->old_dir, &hdr);
2226         encode_savefh(xdr, &hdr);
2227         encode_putfh(xdr, args->new_dir, &hdr);
2228         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2229         encode_nops(&hdr);
2230 }
2231
2232 /*
2233  * Encode LINK request
2234  */
2235 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2236                               const void *data)
2237 {
2238         const struct nfs4_link_arg *args = data;
2239         struct compound_hdr hdr = {
2240                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_sequence(xdr, &args->seq_args, &hdr);
2245         encode_putfh(xdr, args->fh, &hdr);
2246         encode_savefh(xdr, &hdr);
2247         encode_putfh(xdr, args->dir_fh, &hdr);
2248         encode_link(xdr, args->name, &hdr);
2249         encode_restorefh(xdr, &hdr);
2250         encode_getfattr(xdr, args->bitmask, &hdr);
2251         encode_nops(&hdr);
2252 }
2253
2254 /*
2255  * Encode CREATE request
2256  */
2257 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2258                                 const void *data)
2259 {
2260         const struct nfs4_create_arg *args = data;
2261         struct compound_hdr hdr = {
2262                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263         };
2264
2265         encode_compound_hdr(xdr, req, &hdr);
2266         encode_sequence(xdr, &args->seq_args, &hdr);
2267         encode_putfh(xdr, args->dir_fh, &hdr);
2268         encode_create(xdr, args, &hdr);
2269         encode_getfh(xdr, &hdr);
2270         encode_getfattr(xdr, args->bitmask, &hdr);
2271         encode_nops(&hdr);
2272 }
2273
2274 /*
2275  * Encode SYMLINK request
2276  */
2277 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2278                                  const void *data)
2279 {
2280         const struct nfs4_create_arg *args = data;
2281
2282         nfs4_xdr_enc_create(req, xdr, args);
2283 }
2284
2285 /*
2286  * Encode GETATTR request
2287  */
2288 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2289                                  const void *data)
2290 {
2291         const struct nfs4_getattr_arg *args = data;
2292         struct compound_hdr hdr = {
2293                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294         };
2295
2296         encode_compound_hdr(xdr, req, &hdr);
2297         encode_sequence(xdr, &args->seq_args, &hdr);
2298         encode_putfh(xdr, args->fh, &hdr);
2299         encode_getfattr(xdr, args->bitmask, &hdr);
2300         encode_nops(&hdr);
2301 }
2302
2303 /*
2304  * Encode a CLOSE request
2305  */
2306 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2307                                const void *data)
2308 {
2309         const struct nfs_closeargs *args = data;
2310         struct compound_hdr hdr = {
2311                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312         };
2313
2314         encode_compound_hdr(xdr, req, &hdr);
2315         encode_sequence(xdr, &args->seq_args, &hdr);
2316         encode_putfh(xdr, args->fh, &hdr);
2317         if (args->lr_args)
2318                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2319         if (args->bitmask != NULL)
2320                 encode_getfattr(xdr, args->bitmask, &hdr);
2321         encode_close(xdr, args, &hdr);
2322         encode_nops(&hdr);
2323 }
2324
2325 /*
2326  * Encode an OPEN request
2327  */
2328 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2329                               const void *data)
2330 {
2331         const struct nfs_openargs *args = data;
2332         struct compound_hdr hdr = {
2333                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334         };
2335
2336         encode_compound_hdr(xdr, req, &hdr);
2337         encode_sequence(xdr, &args->seq_args, &hdr);
2338         encode_putfh(xdr, args->fh, &hdr);
2339         encode_open(xdr, args, &hdr);
2340         encode_getfh(xdr, &hdr);
2341         if (args->access)
2342                 encode_access(xdr, args->access, &hdr);
2343         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344         if (args->lg_args) {
2345                 encode_layoutget(xdr, args->lg_args, &hdr);
2346                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2347                                         args->lg_args->layout.pglen,
2348                                         hdr.replen);
2349         }
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * Encode an OPEN_CONFIRM request
2355  */
2356 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2357                                       struct xdr_stream *xdr,
2358                                       const void *data)
2359 {
2360         const struct nfs_open_confirmargs *args = data;
2361         struct compound_hdr hdr = {
2362                 .nops   = 0,
2363         };
2364
2365         encode_compound_hdr(xdr, req, &hdr);
2366         encode_putfh(xdr, args->fh, &hdr);
2367         encode_open_confirm(xdr, args, &hdr);
2368         encode_nops(&hdr);
2369 }
2370
2371 /*
2372  * Encode an OPEN request with no attributes.
2373  */
2374 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2375                                      struct xdr_stream *xdr,
2376                                      const void *data)
2377 {
2378         const struct nfs_openargs *args = data;
2379         struct compound_hdr hdr = {
2380                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381         };
2382
2383         encode_compound_hdr(xdr, req, &hdr);
2384         encode_sequence(xdr, &args->seq_args, &hdr);
2385         encode_putfh(xdr, args->fh, &hdr);
2386         encode_open(xdr, args, &hdr);
2387         if (args->access)
2388                 encode_access(xdr, args->access, &hdr);
2389         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2390         if (args->lg_args) {
2391                 encode_layoutget(xdr, args->lg_args, &hdr);
2392                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2393                                         args->lg_args->layout.pglen,
2394                                         hdr.replen);
2395         }
2396         encode_nops(&hdr);
2397 }
2398
2399 /*
2400  * Encode an OPEN_DOWNGRADE request
2401  */
2402 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2403                                         struct xdr_stream *xdr,
2404                                         const void *data)
2405 {
2406         const struct nfs_closeargs *args = data;
2407         struct compound_hdr hdr = {
2408                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409         };
2410
2411         encode_compound_hdr(xdr, req, &hdr);
2412         encode_sequence(xdr, &args->seq_args, &hdr);
2413         encode_putfh(xdr, args->fh, &hdr);
2414         if (args->lr_args)
2415                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2416         encode_open_downgrade(xdr, args, &hdr);
2417         encode_nops(&hdr);
2418 }
2419
2420 /*
2421  * Encode a LOCK request
2422  */
2423 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2424                               const void *data)
2425 {
2426         const struct nfs_lock_args *args = data;
2427         struct compound_hdr hdr = {
2428                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429         };
2430
2431         encode_compound_hdr(xdr, req, &hdr);
2432         encode_sequence(xdr, &args->seq_args, &hdr);
2433         encode_putfh(xdr, args->fh, &hdr);
2434         encode_lock(xdr, args, &hdr);
2435         encode_nops(&hdr);
2436 }
2437
2438 /*
2439  * Encode a LOCKT request
2440  */
2441 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2442                                const void *data)
2443 {
2444         const struct nfs_lockt_args *args = data;
2445         struct compound_hdr hdr = {
2446                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2447         };
2448
2449         encode_compound_hdr(xdr, req, &hdr);
2450         encode_sequence(xdr, &args->seq_args, &hdr);
2451         encode_putfh(xdr, args->fh, &hdr);
2452         encode_lockt(xdr, args, &hdr);
2453         encode_nops(&hdr);
2454 }
2455
2456 /*
2457  * Encode a LOCKU request
2458  */
2459 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2460                                const void *data)
2461 {
2462         const struct nfs_locku_args *args = data;
2463         struct compound_hdr hdr = {
2464                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465         };
2466
2467         encode_compound_hdr(xdr, req, &hdr);
2468         encode_sequence(xdr, &args->seq_args, &hdr);
2469         encode_putfh(xdr, args->fh, &hdr);
2470         encode_locku(xdr, args, &hdr);
2471         encode_nops(&hdr);
2472 }
2473
2474 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2475                                            struct xdr_stream *xdr,
2476                                            const void *data)
2477 {
2478         const struct nfs_release_lockowner_args *args = data;
2479         struct compound_hdr hdr = {
2480                 .minorversion = 0,
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode a READLINK request
2490  */
2491 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                   const void *data)
2493 {
2494         const struct nfs4_readlink *args = data;
2495         struct compound_hdr hdr = {
2496                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497         };
2498
2499         encode_compound_hdr(xdr, req, &hdr);
2500         encode_sequence(xdr, &args->seq_args, &hdr);
2501         encode_putfh(xdr, args->fh, &hdr);
2502         encode_readlink(xdr, args, req, &hdr);
2503
2504         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2505                                 args->pglen, hdr.replen);
2506         encode_nops(&hdr);
2507 }
2508
2509 /*
2510  * Encode a READDIR request
2511  */
2512 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2513                                  const void *data)
2514 {
2515         const struct nfs4_readdir_arg *args = data;
2516         struct compound_hdr hdr = {
2517                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2518         };
2519
2520         encode_compound_hdr(xdr, req, &hdr);
2521         encode_sequence(xdr, &args->seq_args, &hdr);
2522         encode_putfh(xdr, args->fh, &hdr);
2523         encode_readdir(xdr, args, req, &hdr);
2524
2525         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2526                                 args->count, hdr.replen);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * Encode a READ request
2532  */
2533 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                               const void *data)
2535 {
2536         const struct nfs_pgio_args *args = data;
2537         struct compound_hdr hdr = {
2538                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539         };
2540
2541         encode_compound_hdr(xdr, req, &hdr);
2542         encode_sequence(xdr, &args->seq_args, &hdr);
2543         encode_putfh(xdr, args->fh, &hdr);
2544         encode_read(xdr, args, &hdr);
2545
2546         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2547                                 args->count, hdr.replen);
2548         req->rq_rcv_buf.flags |= XDRBUF_READ;
2549         encode_nops(&hdr);
2550 }
2551
2552 /*
2553  * Encode an SETATTR request
2554  */
2555 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                  const void *data)
2557 {
2558         const struct nfs_setattrargs *args = data;
2559         struct compound_hdr hdr = {
2560                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561         };
2562
2563         encode_compound_hdr(xdr, req, &hdr);
2564         encode_sequence(xdr, &args->seq_args, &hdr);
2565         encode_putfh(xdr, args->fh, &hdr);
2566         encode_setattr(xdr, args, args->server, &hdr);
2567         encode_getfattr(xdr, args->bitmask, &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * Encode a GETACL request
2573  */
2574 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                 const void *data)
2576 {
2577         const struct nfs_getaclargs *args = data;
2578         struct compound_hdr hdr = {
2579                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580         };
2581         const __u32 nfs4_acl_bitmap[1] = {
2582                 [0] = FATTR4_WORD0_ACL,
2583         };
2584         uint32_t replen;
2585
2586         encode_compound_hdr(xdr, req, &hdr);
2587         encode_sequence(xdr, &args->seq_args, &hdr);
2588         encode_putfh(xdr, args->fh, &hdr);
2589         replen = hdr.replen + op_decode_hdr_maxsz;
2590         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2594                                 args->acl_len, replen + 1);
2595         encode_nops(&hdr);
2596 }
2597
2598 /*
2599  * Encode a WRITE request
2600  */
2601 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2602                                const void *data)
2603 {
2604         const struct nfs_pgio_args *args = data;
2605         struct compound_hdr hdr = {
2606                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2607         };
2608
2609         encode_compound_hdr(xdr, req, &hdr);
2610         encode_sequence(xdr, &args->seq_args, &hdr);
2611         encode_putfh(xdr, args->fh, &hdr);
2612         encode_write(xdr, args, &hdr);
2613         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2614         if (args->bitmask)
2615                 encode_getfattr(xdr, args->bitmask, &hdr);
2616         encode_nops(&hdr);
2617 }
2618
2619 /*
2620  *  a COMMIT request
2621  */
2622 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2623                                 const void *data)
2624 {
2625         const struct nfs_commitargs *args = data;
2626         struct compound_hdr hdr = {
2627                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628         };
2629
2630         encode_compound_hdr(xdr, req, &hdr);
2631         encode_sequence(xdr, &args->seq_args, &hdr);
2632         encode_putfh(xdr, args->fh, &hdr);
2633         encode_commit(xdr, args, &hdr);
2634         encode_nops(&hdr);
2635 }
2636
2637 /*
2638  * FSINFO request
2639  */
2640 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2641                                 const void *data)
2642 {
2643         const struct nfs4_fsinfo_arg *args = data;
2644         struct compound_hdr hdr = {
2645                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2646         };
2647
2648         encode_compound_hdr(xdr, req, &hdr);
2649         encode_sequence(xdr, &args->seq_args, &hdr);
2650         encode_putfh(xdr, args->fh, &hdr);
2651         encode_fsinfo(xdr, args->bitmask, &hdr);
2652         encode_nops(&hdr);
2653 }
2654
2655 /*
2656  * a PATHCONF request
2657  */
2658 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2659                                   const void *data)
2660 {
2661         const struct nfs4_pathconf_arg *args = data;
2662         struct compound_hdr hdr = {
2663                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664         };
2665
2666         encode_compound_hdr(xdr, req, &hdr);
2667         encode_sequence(xdr, &args->seq_args, &hdr);
2668         encode_putfh(xdr, args->fh, &hdr);
2669         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2670                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * a STATFS request
2676  */
2677 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2678                                 const void *data)
2679 {
2680         const struct nfs4_statfs_arg *args = data;
2681         struct compound_hdr hdr = {
2682                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683         };
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_sequence(xdr, &args->seq_args, &hdr);
2687         encode_putfh(xdr, args->fh, &hdr);
2688         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2689                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2690         encode_nops(&hdr);
2691 }
2692
2693 /*
2694  * GETATTR_BITMAP request
2695  */
2696 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2697                                      struct xdr_stream *xdr,
2698                                      const void *data)
2699 {
2700         const struct nfs4_server_caps_arg *args = data;
2701         const u32 *bitmask = args->bitmask;
2702         struct compound_hdr hdr = {
2703                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2704         };
2705
2706         encode_compound_hdr(xdr, req, &hdr);
2707         encode_sequence(xdr, &args->seq_args, &hdr);
2708         encode_putfh(xdr, args->fhandle, &hdr);
2709         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2710         encode_nops(&hdr);
2711 }
2712
2713 /*
2714  * a RENEW request
2715  */
2716 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2717                                const void *data)
2718
2719 {
2720         const struct nfs_client *clp = data;
2721         struct compound_hdr hdr = {
2722                 .nops   = 0,
2723         };
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_renew(xdr, clp->cl_clientid, &hdr);
2727         encode_nops(&hdr);
2728 }
2729
2730 /*
2731  * a SETCLIENTID request
2732  */
2733 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2734                                      struct xdr_stream *xdr,
2735                                      const void *data)
2736 {
2737         const struct nfs4_setclientid *sc = data;
2738         struct compound_hdr hdr = {
2739                 .nops   = 0,
2740         };
2741
2742         encode_compound_hdr(xdr, req, &hdr);
2743         encode_setclientid(xdr, sc, &hdr);
2744         encode_nops(&hdr);
2745 }
2746
2747 /*
2748  * a SETCLIENTID_CONFIRM request
2749  */
2750 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2751                                              struct xdr_stream *xdr,
2752                                              const void *data)
2753 {
2754         const struct nfs4_setclientid_res *arg = data;
2755         struct compound_hdr hdr = {
2756                 .nops   = 0,
2757         };
2758
2759         encode_compound_hdr(xdr, req, &hdr);
2760         encode_setclientid_confirm(xdr, arg, &hdr);
2761         encode_nops(&hdr);
2762 }
2763
2764 /*
2765  * DELEGRETURN request
2766  */
2767 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2768                                      struct xdr_stream *xdr,
2769                                      const void *data)
2770 {
2771         const struct nfs4_delegreturnargs *args = data;
2772         struct compound_hdr hdr = {
2773                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774         };
2775
2776         encode_compound_hdr(xdr, req, &hdr);
2777         encode_sequence(xdr, &args->seq_args, &hdr);
2778         encode_putfh(xdr, args->fhandle, &hdr);
2779         if (args->lr_args)
2780                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2781         if (args->bitmask)
2782                 encode_getfattr(xdr, args->bitmask, &hdr);
2783         encode_delegreturn(xdr, args->stateid, &hdr);
2784         encode_nops(&hdr);
2785 }
2786
2787 /*
2788  * Encode FS_LOCATIONS request
2789  */
2790 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2791                                       struct xdr_stream *xdr,
2792                                       const void *data)
2793 {
2794         const struct nfs4_fs_locations_arg *args = data;
2795         struct compound_hdr hdr = {
2796                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2797         };
2798         uint32_t replen;
2799
2800         encode_compound_hdr(xdr, req, &hdr);
2801         encode_sequence(xdr, &args->seq_args, &hdr);
2802         if (args->migration) {
2803                 encode_putfh(xdr, args->fh, &hdr);
2804                 replen = hdr.replen;
2805                 encode_fs_locations(xdr, args->bitmask, &hdr);
2806                 if (args->renew)
2807                         encode_renew(xdr, args->clientid, &hdr);
2808         } else {
2809                 encode_putfh(xdr, args->dir_fh, &hdr);
2810                 encode_lookup(xdr, args->name, &hdr);
2811                 replen = hdr.replen;
2812                 encode_fs_locations(xdr, args->bitmask, &hdr);
2813         }
2814
2815         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2816                                 PAGE_SIZE, replen + 1);
2817         encode_nops(&hdr);
2818 }
2819
2820 /*
2821  * Encode SECINFO request
2822  */
2823 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2824                                 struct xdr_stream *xdr,
2825                                 const void *data)
2826 {
2827         const struct nfs4_secinfo_arg *args = data;
2828         struct compound_hdr hdr = {
2829                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2830         };
2831
2832         encode_compound_hdr(xdr, req, &hdr);
2833         encode_sequence(xdr, &args->seq_args, &hdr);
2834         encode_putfh(xdr, args->dir_fh, &hdr);
2835         encode_secinfo(xdr, args->name, &hdr);
2836         encode_nops(&hdr);
2837 }
2838
2839 /*
2840  * Encode FSID_PRESENT request
2841  */
2842 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2843                                       struct xdr_stream *xdr,
2844                                       const void *data)
2845 {
2846         const struct nfs4_fsid_present_arg *args = data;
2847         struct compound_hdr hdr = {
2848                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849         };
2850
2851         encode_compound_hdr(xdr, req, &hdr);
2852         encode_sequence(xdr, &args->seq_args, &hdr);
2853         encode_putfh(xdr, args->fh, &hdr);
2854         encode_getfh(xdr, &hdr);
2855         if (args->renew)
2856                 encode_renew(xdr, args->clientid, &hdr);
2857         encode_nops(&hdr);
2858 }
2859
2860 #if defined(CONFIG_NFS_V4_1)
2861 /*
2862  * BIND_CONN_TO_SESSION request
2863  */
2864 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2865                                 struct xdr_stream *xdr,
2866                                 const void *data)
2867 {
2868         const struct nfs41_bind_conn_to_session_args *args = data;
2869         struct compound_hdr hdr = {
2870                 .minorversion = args->client->cl_mvops->minor_version,
2871         };
2872
2873         encode_compound_hdr(xdr, req, &hdr);
2874         encode_bind_conn_to_session(xdr, args, &hdr);
2875         encode_nops(&hdr);
2876 }
2877
2878 /*
2879  * EXCHANGE_ID request
2880  */
2881 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2882                                      struct xdr_stream *xdr,
2883                                      const void *data)
2884 {
2885         const struct nfs41_exchange_id_args *args = data;
2886         struct compound_hdr hdr = {
2887                 .minorversion = args->client->cl_mvops->minor_version,
2888         };
2889
2890         encode_compound_hdr(xdr, req, &hdr);
2891         encode_exchange_id(xdr, args, &hdr);
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  * a CREATE_SESSION request
2897  */
2898 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2899                                         struct xdr_stream *xdr,
2900                                         const void *data)
2901 {
2902         const struct nfs41_create_session_args *args = data;
2903         struct compound_hdr hdr = {
2904                 .minorversion = args->client->cl_mvops->minor_version,
2905         };
2906
2907         encode_compound_hdr(xdr, req, &hdr);
2908         encode_create_session(xdr, args, &hdr);
2909         encode_nops(&hdr);
2910 }
2911
2912 /*
2913  * a DESTROY_SESSION request
2914  */
2915 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2916                                          struct xdr_stream *xdr,
2917                                          const void *data)
2918 {
2919         const struct nfs4_session *session = data;
2920         struct compound_hdr hdr = {
2921                 .minorversion = session->clp->cl_mvops->minor_version,
2922         };
2923
2924         encode_compound_hdr(xdr, req, &hdr);
2925         encode_destroy_session(xdr, session, &hdr);
2926         encode_nops(&hdr);
2927 }
2928
2929 /*
2930  * a DESTROY_CLIENTID request
2931  */
2932 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2933                                          struct xdr_stream *xdr,
2934                                          const void *data)
2935 {
2936         const struct nfs_client *clp = data;
2937         struct compound_hdr hdr = {
2938                 .minorversion = clp->cl_mvops->minor_version,
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2943         encode_nops(&hdr);
2944 }
2945
2946 /*
2947  * a SEQUENCE request
2948  */
2949 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2950                                   const void *data)
2951 {
2952         const struct nfs4_sequence_args *args = data;
2953         struct compound_hdr hdr = {
2954                 .minorversion = nfs4_xdr_minorversion(args),
2955         };
2956
2957         encode_compound_hdr(xdr, req, &hdr);
2958         encode_sequence(xdr, args, &hdr);
2959         encode_nops(&hdr);
2960 }
2961
2962 #endif
2963
2964 /*
2965  * a GET_LEASE_TIME request
2966  */
2967 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968                                         struct xdr_stream *xdr,
2969                                         const void *data)
2970 {
2971         const struct nfs4_get_lease_time_args *args = data;
2972         struct compound_hdr hdr = {
2973                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974         };
2975         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977         encode_compound_hdr(xdr, req, &hdr);
2978         encode_sequence(xdr, &args->la_seq_args, &hdr);
2979         encode_putrootfh(xdr, &hdr);
2980         encode_fsinfo(xdr, lease_bitmap, &hdr);
2981         encode_nops(&hdr);
2982 }
2983
2984 #ifdef CONFIG_NFS_V4_1
2985
2986 /*
2987  * a RECLAIM_COMPLETE request
2988  */
2989 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2990                                           struct xdr_stream *xdr,
2991                                           const void *data)
2992 {
2993         const struct nfs41_reclaim_complete_args *args = data;
2994         struct compound_hdr hdr = {
2995                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2996         };
2997
2998         encode_compound_hdr(xdr, req, &hdr);
2999         encode_sequence(xdr, &args->seq_args, &hdr);
3000         encode_reclaim_complete(xdr, args, &hdr);
3001         encode_nops(&hdr);
3002 }
3003
3004 /*
3005  * Encode GETDEVICEINFO request
3006  */
3007 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3008                                        struct xdr_stream *xdr,
3009                                        const void *data)
3010 {
3011         const struct nfs4_getdeviceinfo_args *args = data;
3012         struct compound_hdr hdr = {
3013                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014         };
3015         uint32_t replen;
3016
3017         encode_compound_hdr(xdr, req, &hdr);
3018         encode_sequence(xdr, &args->seq_args, &hdr);
3019
3020         replen = hdr.replen + op_decode_hdr_maxsz;
3021
3022         encode_getdeviceinfo(xdr, args, &hdr);
3023
3024         /* set up reply kvec. device_addr4 opaque data is read into the
3025          * pages */
3026         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3027                                 args->pdev->pglen, replen + 2 + 1);
3028         encode_nops(&hdr);
3029 }
3030
3031 /*
3032  *  Encode LAYOUTGET request
3033  */
3034 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3035                                    struct xdr_stream *xdr,
3036                                    const void *data)
3037 {
3038         const struct nfs4_layoutget_args *args = data;
3039         struct compound_hdr hdr = {
3040                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3041         };
3042
3043         encode_compound_hdr(xdr, req, &hdr);
3044         encode_sequence(xdr, &args->seq_args, &hdr);
3045         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3046         encode_layoutget(xdr, args, &hdr);
3047
3048         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3049                                 args->layout.pglen, hdr.replen);
3050         encode_nops(&hdr);
3051 }
3052
3053 /*
3054  *  Encode LAYOUTCOMMIT request
3055  */
3056 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3057                                       struct xdr_stream *xdr,
3058                                       const void *priv)
3059 {
3060         const struct nfs4_layoutcommit_args *args = priv;
3061         struct nfs4_layoutcommit_data *data =
3062                 container_of(args, struct nfs4_layoutcommit_data, args);
3063         struct compound_hdr hdr = {
3064                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3065         };
3066
3067         encode_compound_hdr(xdr, req, &hdr);
3068         encode_sequence(xdr, &args->seq_args, &hdr);
3069         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3070         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3071         encode_getfattr(xdr, args->bitmask, &hdr);
3072         encode_nops(&hdr);
3073 }
3074
3075 /*
3076  * Encode LAYOUTRETURN request
3077  */
3078 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3079                                       struct xdr_stream *xdr,
3080                                       const void *data)
3081 {
3082         const struct nfs4_layoutreturn_args *args = data;
3083         struct compound_hdr hdr = {
3084                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3085         };
3086
3087         encode_compound_hdr(xdr, req, &hdr);
3088         encode_sequence(xdr, &args->seq_args, &hdr);
3089         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3090         encode_layoutreturn(xdr, args, &hdr);
3091         encode_nops(&hdr);
3092 }
3093
3094 /*
3095  * Encode SECINFO_NO_NAME request
3096  */
3097 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3098                                         struct xdr_stream *xdr,
3099                                         const void *data)
3100 {
3101         const struct nfs41_secinfo_no_name_args *args = data;
3102         struct compound_hdr hdr = {
3103                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3104         };
3105
3106         encode_compound_hdr(xdr, req, &hdr);
3107         encode_sequence(xdr, &args->seq_args, &hdr);
3108         encode_putrootfh(xdr, &hdr);
3109         encode_secinfo_no_name(xdr, args, &hdr);
3110         encode_nops(&hdr);
3111 }
3112
3113 /*
3114  *  Encode TEST_STATEID request
3115  */
3116 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3117                                       struct xdr_stream *xdr,
3118                                       const void *data)
3119 {
3120         const struct nfs41_test_stateid_args *args = data;
3121         struct compound_hdr hdr = {
3122                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3123         };
3124
3125         encode_compound_hdr(xdr, req, &hdr);
3126         encode_sequence(xdr, &args->seq_args, &hdr);
3127         encode_test_stateid(xdr, args, &hdr);
3128         encode_nops(&hdr);
3129 }
3130
3131 /*
3132  *  Encode FREE_STATEID request
3133  */
3134 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3135                                      struct xdr_stream *xdr,
3136                                      const void *data)
3137 {
3138         const struct nfs41_free_stateid_args *args = data;
3139         struct compound_hdr hdr = {
3140                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3141         };
3142
3143         encode_compound_hdr(xdr, req, &hdr);
3144         encode_sequence(xdr, &args->seq_args, &hdr);
3145         encode_free_stateid(xdr, args, &hdr);
3146         encode_nops(&hdr);
3147 }
3148 #endif /* CONFIG_NFS_V4_1 */
3149
3150 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3151 {
3152         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3153                         NFS4_OPAQUE_LIMIT);
3154         if (unlikely(ret < 0))
3155                 return -EIO;
3156         *len = ret;
3157         return 0;
3158 }
3159
3160 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3161 {
3162         __be32 *p;
3163
3164         p = xdr_inline_decode(xdr, 8);
3165         if (unlikely(!p))
3166                 return -EIO;
3167         hdr->status = be32_to_cpup(p++);
3168         hdr->taglen = be32_to_cpup(p);
3169
3170         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3171         if (unlikely(!p))
3172                 return -EIO;
3173         hdr->tag = (char *)p;
3174         p += XDR_QUADLEN(hdr->taglen);
3175         hdr->nops = be32_to_cpup(p);
3176         if (unlikely(hdr->nops < 1))
3177                 return nfs4_stat_to_errno(hdr->status);
3178         return 0;
3179 }
3180
3181 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3182                 int *nfs_retval)
3183 {
3184         __be32 *p;
3185         uint32_t opnum;
3186         int32_t nfserr;
3187
3188         p = xdr_inline_decode(xdr, 8);
3189         if (unlikely(!p))
3190                 goto out_overflow;
3191         opnum = be32_to_cpup(p++);
3192         if (unlikely(opnum != expected))
3193                 goto out_bad_operation;
3194         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3195                 goto out_status;
3196         *nfs_retval = 0;
3197         return true;
3198 out_status:
3199         nfserr = be32_to_cpup(p);
3200         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3201         *nfs_retval = nfs4_stat_to_errno(nfserr);
3202         return true;
3203 out_bad_operation:
3204         dprintk("nfs: Server returned operation"
3205                 " %d but we issued a request for %d\n",
3206                         opnum, expected);
3207         *nfs_retval = -EREMOTEIO;
3208         return false;
3209 out_overflow:
3210         *nfs_retval = -EIO;
3211         return false;
3212 }
3213
3214 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3215 {
3216         int retval;
3217
3218         __decode_op_hdr(xdr, expected, &retval);
3219         return retval;
3220 }
3221
3222 /* Dummy routine */
3223 static int decode_ace(struct xdr_stream *xdr, void *ace)
3224 {
3225         __be32 *p;
3226         unsigned int strlen;
3227         char *str;
3228
3229         p = xdr_inline_decode(xdr, 12);
3230         if (unlikely(!p))
3231                 return -EIO;
3232         return decode_opaque_inline(xdr, &strlen, &str);
3233 }
3234
3235 static ssize_t
3236 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3237 {
3238         ssize_t ret;
3239
3240         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3241         if (likely(ret >= 0))
3242                 return ret;
3243         if (ret != -EMSGSIZE)
3244                 return -EIO;
3245         return sz;
3246 }
3247
3248 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3249 {
3250         ssize_t ret;
3251         ret = decode_bitmap4(xdr, bitmap, 3);
3252         return ret < 0 ? ret : 0;
3253 }
3254
3255 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3256 {
3257         __be32 *p;
3258
3259         p = xdr_inline_decode(xdr, 4);
3260         if (unlikely(!p))
3261                 return -EIO;
3262         *attrlen = be32_to_cpup(p);
3263         *savep = xdr_stream_pos(xdr);
3264         return 0;
3265 }
3266
3267 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3268 {
3269         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3270                 int ret;
3271                 ret = decode_attr_bitmap(xdr, bitmask);
3272                 if (unlikely(ret < 0))
3273                         return ret;
3274                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3275         } else
3276                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3277         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3278                 bitmask[0], bitmask[1], bitmask[2]);
3279         return 0;
3280 }
3281
3282 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3283 {
3284         __be32 *p;
3285         int ret = 0;
3286
3287         *type = 0;
3288         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3289                 return -EIO;
3290         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3291                 p = xdr_inline_decode(xdr, 4);
3292                 if (unlikely(!p))
3293                         return -EIO;
3294                 *type = be32_to_cpup(p);
3295                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3296                         dprintk("%s: bad type %d\n", __func__, *type);
3297                         return -EIO;
3298                 }
3299                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3300                 ret = NFS_ATTR_FATTR_TYPE;
3301         }
3302         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3303         return ret;
3304 }
3305
3306 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3307                                       uint32_t *bitmap, uint32_t *type)
3308 {
3309         __be32 *p;
3310
3311         *type = 0;
3312         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3313                 return -EIO;
3314         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3315                 p = xdr_inline_decode(xdr, 4);
3316                 if (unlikely(!p))
3317                         return -EIO;
3318                 *type = be32_to_cpup(p);
3319                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3320         }
3321         dprintk("%s: expire type=0x%x\n", __func__, *type);
3322         return 0;
3323 }
3324
3325 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3326 {
3327         __be32 *p;
3328         int ret = 0;
3329
3330         *change = 0;
3331         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3332                 return -EIO;
3333         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3334                 p = xdr_inline_decode(xdr, 8);
3335                 if (unlikely(!p))
3336                         return -EIO;
3337                 xdr_decode_hyper(p, change);
3338                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3339                 ret = NFS_ATTR_FATTR_CHANGE;
3340         }
3341         dprintk("%s: change attribute=%Lu\n", __func__,
3342                         (unsigned long long)*change);
3343         return ret;
3344 }
3345
3346 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3347 {
3348         __be32 *p;
3349         int ret = 0;
3350
3351         *size = 0;
3352         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3353                 return -EIO;
3354         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3355                 p = xdr_inline_decode(xdr, 8);
3356                 if (unlikely(!p))
3357                         return -EIO;
3358                 xdr_decode_hyper(p, size);
3359                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3360                 ret = NFS_ATTR_FATTR_SIZE;
3361         }
3362         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3363         return ret;
3364 }
3365
3366 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3367 {
3368         __be32 *p;
3369
3370         *res = 0;
3371         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3374                 p = xdr_inline_decode(xdr, 4);
3375                 if (unlikely(!p))
3376                         return -EIO;
3377                 *res = be32_to_cpup(p);
3378                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3379         }
3380         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3381         return 0;
3382 }
3383
3384 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3385 {
3386         __be32 *p;
3387
3388         *res = 0;
3389         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3390                 return -EIO;
3391         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3392                 p = xdr_inline_decode(xdr, 4);
3393                 if (unlikely(!p))
3394                         return -EIO;
3395                 *res = be32_to_cpup(p);
3396                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3397         }
3398         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3399         return 0;
3400 }
3401
3402 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3403 {
3404         __be32 *p;
3405         int ret = 0;
3406
3407         fsid->major = 0;
3408         fsid->minor = 0;
3409         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3410                 return -EIO;
3411         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3412                 p = xdr_inline_decode(xdr, 16);
3413                 if (unlikely(!p))
3414                         return -EIO;
3415                 p = xdr_decode_hyper(p, &fsid->major);
3416                 xdr_decode_hyper(p, &fsid->minor);
3417                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3418                 ret = NFS_ATTR_FATTR_FSID;
3419         }
3420         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3421                         (unsigned long long)fsid->major,
3422                         (unsigned long long)fsid->minor);
3423         return ret;
3424 }
3425
3426 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3427 {
3428         __be32 *p;
3429
3430         *res = 60;
3431         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3432                 return -EIO;
3433         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3434                 p = xdr_inline_decode(xdr, 4);
3435                 if (unlikely(!p))
3436                         return -EIO;
3437                 *res = be32_to_cpup(p);
3438                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3439         }
3440         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3441         return 0;
3442 }
3443
3444 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3445 {
3446         __be32 *p;
3447
3448         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3451                 p = xdr_inline_decode(xdr, 4);
3452                 if (unlikely(!p))
3453                         return -EIO;
3454                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3455                 *res = -be32_to_cpup(p);
3456         }
3457         return 0;
3458 }
3459
3460 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3461                                  uint32_t *bitmap, uint32_t *bitmask)
3462 {
3463         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3464                 int ret;
3465                 ret = decode_attr_bitmap(xdr, bitmask);
3466                 if (unlikely(ret < 0))
3467                         return ret;
3468                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3469         } else
3470                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3471         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3472                 bitmask[0], bitmask[1], bitmask[2]);
3473         return 0;
3474 }
3475
3476 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3477 {
3478         __be32 *p;
3479         u32 len;
3480
3481         if (fh != NULL)
3482                 memset(fh, 0, sizeof(*fh));
3483
3484         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3485                 return -EIO;
3486         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3487                 p = xdr_inline_decode(xdr, 4);
3488                 if (unlikely(!p))
3489                         return -EIO;
3490                 len = be32_to_cpup(p);
3491                 if (len > NFS4_FHSIZE)
3492                         return -EIO;
3493                 p = xdr_inline_decode(xdr, len);
3494                 if (unlikely(!p))
3495                         return -EIO;
3496                 if (fh != NULL) {
3497                         memcpy(fh->data, p, len);
3498                         fh->size = len;
3499                 }
3500                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3501         }
3502         return 0;
3503 }
3504
3505 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3506 {
3507         __be32 *p;
3508
3509         *res = 0;
3510         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3511                 return -EIO;
3512         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3513                 p = xdr_inline_decode(xdr, 4);
3514                 if (unlikely(!p))
3515                         return -EIO;
3516                 *res = be32_to_cpup(p);
3517                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3518         }
3519         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3520         return 0;
3521 }
3522
3523 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3524 {
3525         __be32 *p;
3526         int ret = 0;
3527
3528         *fileid = 0;
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3532                 p = xdr_inline_decode(xdr, 8);
3533                 if (unlikely(!p))
3534                         return -EIO;
3535                 xdr_decode_hyper(p, fileid);
3536                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3537                 ret = NFS_ATTR_FATTR_FILEID;
3538         }
3539         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3540         return ret;
3541 }
3542
3543 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3544 {
3545         __be32 *p;
3546         int ret = 0;
3547
3548         *fileid = 0;
3549         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3550                 return -EIO;
3551         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3552                 p = xdr_inline_decode(xdr, 8);
3553                 if (unlikely(!p))
3554                         return -EIO;
3555                 xdr_decode_hyper(p, fileid);
3556                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3557                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3558         }
3559         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3560         return ret;
3561 }
3562
3563 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3564 {
3565         __be32 *p;
3566         int status = 0;
3567
3568         *res = 0;
3569         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3570                 return -EIO;
3571         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3572                 p = xdr_inline_decode(xdr, 8);
3573                 if (unlikely(!p))
3574                         return -EIO;
3575                 xdr_decode_hyper(p, res);
3576                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3577         }
3578         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3579         return status;
3580 }
3581
3582 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3583 {
3584         __be32 *p;
3585         int status = 0;
3586
3587         *res = 0;
3588         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3589                 return -EIO;
3590         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3591                 p = xdr_inline_decode(xdr, 8);
3592                 if (unlikely(!p))
3593                         return -EIO;
3594                 xdr_decode_hyper(p, res);
3595                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3596         }
3597         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3598         return status;
3599 }
3600
3601 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3602 {
3603         __be32 *p;
3604         int status = 0;
3605
3606         *res = 0;
3607         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3608                 return -EIO;
3609         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3610                 p = xdr_inline_decode(xdr, 8);
3611                 if (unlikely(!p))
3612                         return -EIO;
3613                 xdr_decode_hyper(p, res);
3614                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3615         }
3616         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3617         return status;
3618 }
3619
3620 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3621 {
3622         u32 n;
3623         __be32 *p;
3624         int status = 0;
3625
3626         p = xdr_inline_decode(xdr, 4);
3627         if (unlikely(!p))
3628                 return -EIO;
3629         n = be32_to_cpup(p);
3630         if (n == 0)
3631                 goto root_path;
3632         dprintk("pathname4: ");
3633         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3634                 dprintk("cannot parse %d components in path\n", n);
3635                 goto out_eio;
3636         }
3637         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3638                 struct nfs4_string *component = &path->components[path->ncomponents];
3639                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3640                 if (unlikely(status != 0))
3641                         goto out_eio;
3642                 ifdebug (XDR)
3643                         pr_cont("%s%.*s ",
3644                                 (path->ncomponents != n ? "/ " : ""),
3645                                 component->len, component->data);
3646         }
3647 out:
3648         return status;
3649 root_path:
3650 /* a root pathname is sent as a zero component4 */
3651         path->ncomponents = 1;
3652         path->components[0].len=0;
3653         path->components[0].data=NULL;
3654         dprintk("pathname4: /\n");
3655         goto out;
3656 out_eio:
3657         dprintk(" status %d", status);
3658         status = -EIO;
3659         goto out;
3660 }
3661
3662 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3663 {
3664         int n;
3665         __be32 *p;
3666         int status = -EIO;
3667
3668         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3669                 goto out;
3670         status = 0;
3671         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3672                 goto out;
3673         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3674         status = -EIO;
3675         /* Ignore borken servers that return unrequested attrs */
3676         if (unlikely(res == NULL))
3677                 goto out;
3678         dprintk("%s: fsroot:\n", __func__);
3679         status = decode_pathname(xdr, &res->fs_path);
3680         if (unlikely(status != 0))
3681                 goto out;
3682         p = xdr_inline_decode(xdr, 4);
3683         if (unlikely(!p))
3684                 goto out_eio;
3685         n = be32_to_cpup(p);
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                 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4173                 if (len < NFS4_MAXLABELLEN) {
4174                         if (label && label->len) {
4175                                 if (label->len < len)
4176                                         return -ERANGE;
4177                                 memcpy(label->label, p, len);
4178                                 label->len = len;
4179                                 label->pi = pi;
4180                                 label->lfs = lfs;
4181                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4182                         }
4183                 } else
4184                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4185                                         __func__, len);
4186                 if (label && label->label)
4187                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4188                                 __func__, label->len, (char *)label->label,
4189                                 label->len, label->pi, label->lfs);
4190         }
4191         return status;
4192 }
4193
4194 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4195 {
4196         int status = 0;
4197
4198         time->tv_sec = 0;
4199         time->tv_nsec = 0;
4200         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4201                 return -EIO;
4202         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4203                 status = decode_attr_time(xdr, time);
4204                 if (status == 0)
4205                         status = NFS_ATTR_FATTR_MTIME;
4206                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4207         }
4208         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4209         return status;
4210 }
4211
4212 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4213 {
4214         unsigned int attrwords = XDR_QUADLEN(attrlen);
4215         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4216
4217         if (unlikely(attrwords != nwords)) {
4218                 dprintk("%s: server returned incorrect attribute length: "
4219                         "%u %c %u\n",
4220                                 __func__,
4221                                 attrwords << 2,
4222                                 (attrwords < nwords) ? '<' : '>',
4223                                 nwords << 2);
4224                 return -EIO;
4225         }
4226         return 0;
4227 }
4228
4229 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4230 {
4231         __be32 *p;
4232
4233         p = xdr_inline_decode(xdr, 20);
4234         if (unlikely(!p))
4235                 return -EIO;
4236         cinfo->atomic = be32_to_cpup(p++);
4237         p = xdr_decode_hyper(p, &cinfo->before);
4238         xdr_decode_hyper(p, &cinfo->after);
4239         return 0;
4240 }
4241
4242 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4243 {
4244         __be32 *p;
4245         uint32_t supp, acc;
4246         int status;
4247
4248         status = decode_op_hdr(xdr, OP_ACCESS);
4249         if (status)
4250                 return status;
4251         p = xdr_inline_decode(xdr, 8);
4252         if (unlikely(!p))
4253                 return -EIO;
4254         supp = be32_to_cpup(p++);
4255         acc = be32_to_cpup(p);
4256         *supported = supp;
4257         *access = acc;
4258         return 0;
4259 }
4260
4261 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4262 {
4263         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4264         if (unlikely(ret < 0))
4265                 return -EIO;
4266         return 0;
4267 }
4268
4269 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4270 {
4271         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4272 }
4273
4274 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4275 {
4276         stateid->type = NFS4_OPEN_STATEID_TYPE;
4277         return decode_stateid(xdr, stateid);
4278 }
4279
4280 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4281 {
4282         stateid->type = NFS4_LOCK_STATEID_TYPE;
4283         return decode_stateid(xdr, stateid);
4284 }
4285
4286 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4287 {
4288         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4289         return decode_stateid(xdr, stateid);
4290 }
4291
4292 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4293 {
4294         nfs4_stateid dummy;
4295
4296         nfs4_stateid_copy(stateid, &invalid_stateid);
4297         return decode_stateid(xdr, &dummy);
4298 }
4299
4300 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4301 {
4302         int status;
4303
4304         status = decode_op_hdr(xdr, OP_CLOSE);
4305         if (status != -EIO)
4306                 nfs_increment_open_seqid(status, res->seqid);
4307         if (!status)
4308                 status = decode_invalid_stateid(xdr, &res->stateid);
4309         return status;
4310 }
4311
4312 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4313 {
4314         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4315 }
4316
4317 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4318 {
4319         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4320 }
4321
4322 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4323 {
4324         struct nfs_writeverf *verf = res->verf;
4325         int status;
4326
4327         status = decode_op_hdr(xdr, OP_COMMIT);
4328         if (!status)
4329                 status = decode_write_verifier(xdr, &verf->verifier);
4330         if (!status)
4331                 verf->committed = NFS_FILE_SYNC;
4332         return status;
4333 }
4334
4335 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4336 {
4337         __be32 *p;
4338         uint32_t bmlen;
4339         int status;
4340
4341         status = decode_op_hdr(xdr, OP_CREATE);
4342         if (status)
4343                 return status;
4344         if ((status = decode_change_info(xdr, cinfo)))
4345                 return status;
4346         p = xdr_inline_decode(xdr, 4);
4347         if (unlikely(!p))
4348                 return -EIO;
4349         bmlen = be32_to_cpup(p);
4350         p = xdr_inline_decode(xdr, bmlen << 2);
4351         if (likely(p))
4352                 return 0;
4353         return -EIO;
4354 }
4355
4356 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4357 {
4358         unsigned int savep;
4359         uint32_t attrlen, bitmap[3] = {0};
4360         int status;
4361
4362         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4365                 goto xdr_error;
4366         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4369                 goto xdr_error;
4370         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4371                                                  &res->fh_expire_type)) != 0)
4372                 goto xdr_error;
4373         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4374                 goto xdr_error;
4375         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4376                 goto xdr_error;
4377         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4378                 goto xdr_error;
4379         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4380                                 res->exclcreat_bitmask)) != 0)
4381                 goto xdr_error;
4382         status = verify_attr_len(xdr, savep, attrlen);
4383 xdr_error:
4384         dprintk("%s: xdr returned %d!\n", __func__, -status);
4385         return status;
4386 }
4387
4388 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4389 {
4390         unsigned int savep;
4391         uint32_t attrlen, bitmap[3] = {0};
4392         int status;
4393
4394         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4399                 goto xdr_error;
4400
4401         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4406                 goto xdr_error;
4407
4408         status = -EIO;
4409         if (unlikely(bitmap[0]))
4410                 goto xdr_error;
4411
4412         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4413                 goto xdr_error;
4414         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4415                 goto xdr_error;
4416         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4417                 goto xdr_error;
4418
4419         status = verify_attr_len(xdr, savep, attrlen);
4420 xdr_error:
4421         dprintk("%s: xdr returned %d!\n", __func__, -status);
4422         return status;
4423 }
4424
4425 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4426 {
4427         unsigned int savep;
4428         uint32_t attrlen, bitmap[3] = {0};
4429         int status;
4430
4431         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4432                 goto xdr_error;
4433         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4436                 goto xdr_error;
4437
4438         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4439                 goto xdr_error;
4440         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4441                 goto xdr_error;
4442
4443         status = verify_attr_len(xdr, savep, attrlen);
4444 xdr_error:
4445         dprintk("%s: xdr returned %d!\n", __func__, -status);
4446         return status;
4447 }
4448
4449 static int decode_threshold_hint(struct xdr_stream *xdr,
4450                                   uint32_t *bitmap,
4451                                   uint64_t *res,
4452                                   uint32_t hint_bit)
4453 {
4454         __be32 *p;
4455
4456         *res = 0;
4457         if (likely(bitmap[0] & hint_bit)) {
4458                 p = xdr_inline_decode(xdr, 8);
4459                 if (unlikely(!p))
4460                         return -EIO;
4461                 xdr_decode_hyper(p, res);
4462         }
4463         return 0;
4464 }
4465
4466 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4467                                         struct nfs4_threshold *res)
4468 {
4469         __be32 *p;
4470         unsigned int savep;
4471         uint32_t bitmap[3] = {0,}, attrlen;
4472         int status;
4473
4474         /* layout type */
4475         p = xdr_inline_decode(xdr, 4);
4476         if (unlikely(!p))
4477                 return -EIO;
4478         res->l_type = be32_to_cpup(p);
4479
4480         /* thi_hintset bitmap */
4481         status = decode_attr_bitmap(xdr, bitmap);
4482         if (status < 0)
4483                 goto xdr_error;
4484
4485         /* thi_hintlist length */
4486         status = decode_attr_length(xdr, &attrlen, &savep);
4487         if (status < 0)
4488                 goto xdr_error;
4489         /* thi_hintlist */
4490         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4491         if (status < 0)
4492                 goto xdr_error;
4493         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4494         if (status < 0)
4495                 goto xdr_error;
4496         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4497                                        THRESHOLD_RD_IO);
4498         if (status < 0)
4499                 goto xdr_error;
4500         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4501                                        THRESHOLD_WR_IO);
4502         if (status < 0)
4503                 goto xdr_error;
4504
4505         status = verify_attr_len(xdr, savep, attrlen);
4506         res->bm = bitmap[0];
4507
4508         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4509                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4510                 res->wr_io_sz);
4511 xdr_error:
4512         dprintk("%s ret=%d!\n", __func__, status);
4513         return status;
4514 }
4515
4516 /*
4517  * Thresholds on pNFS direct I/O vrs MDS I/O
4518  */
4519 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4520                                     uint32_t *bitmap,
4521                                     struct nfs4_threshold *res)
4522 {
4523         __be32 *p;
4524         int status = 0;
4525         uint32_t num;
4526
4527         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4528                 return -EIO;
4529         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4530                 /* Did the server return an unrequested attribute? */
4531                 if (unlikely(res == NULL))
4532                         return -EREMOTEIO;
4533                 p = xdr_inline_decode(xdr, 4);
4534                 if (unlikely(!p))
4535                         return -EIO;
4536                 num = be32_to_cpup(p);
4537                 if (num == 0)
4538                         return 0;
4539                 if (num > 1)
4540                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4541                                 "drivers per filesystem not supported\n",
4542                                 __func__);
4543
4544                 status = decode_first_threshold_item4(xdr, res);
4545                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4546         }
4547         return status;
4548 }
4549
4550 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4551                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4552                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4553                 const struct nfs_server *server)
4554 {
4555         int status;
4556         umode_t fmode = 0;
4557         uint32_t type;
4558         int32_t err;
4559
4560         status = decode_attr_type(xdr, bitmap, &type);
4561         if (status < 0)
4562                 goto xdr_error;
4563         fattr->mode = 0;
4564         if (status != 0) {
4565                 fattr->mode |= nfs_type2fmt[type];
4566                 fattr->valid |= status;
4567         }
4568
4569         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4570         if (status < 0)
4571                 goto xdr_error;
4572         fattr->valid |= status;
4573
4574         status = decode_attr_size(xdr, bitmap, &fattr->size);
4575         if (status < 0)
4576                 goto xdr_error;
4577         fattr->valid |= status;
4578
4579         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4580         if (status < 0)
4581                 goto xdr_error;
4582         fattr->valid |= status;
4583
4584         err = 0;
4585         status = decode_attr_error(xdr, bitmap, &err);
4586         if (status < 0)
4587                 goto xdr_error;
4588
4589         status = decode_attr_filehandle(xdr, bitmap, fh);
4590         if (status < 0)
4591                 goto xdr_error;
4592
4593         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4594         if (status < 0)
4595                 goto xdr_error;
4596         fattr->valid |= status;
4597
4598         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->valid |= status;
4602
4603         status = -EIO;
4604         if (unlikely(bitmap[0]))
4605                 goto xdr_error;
4606
4607         status = decode_attr_mode(xdr, bitmap, &fmode);
4608         if (status < 0)
4609                 goto xdr_error;
4610         if (status != 0) {
4611                 fattr->mode |= fmode;
4612                 fattr->valid |= status;
4613         }
4614
4615         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4621         if (status < 0)
4622                 goto xdr_error;
4623         fattr->valid |= status;
4624
4625         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4626         if (status < 0)
4627                 goto xdr_error;
4628         fattr->valid |= status;
4629
4630         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4631         if (status < 0)
4632                 goto xdr_error;
4633         fattr->valid |= status;
4634
4635         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4636         if (status < 0)
4637                 goto xdr_error;
4638         fattr->valid |= status;
4639
4640         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4641         if (status < 0)
4642                 goto xdr_error;
4643         fattr->valid |= status;
4644
4645         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4646         if (status < 0)
4647                 goto xdr_error;
4648         fattr->valid |= status;
4649
4650         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4651         if (status < 0)
4652                 goto xdr_error;
4653         fattr->valid |= status;
4654
4655         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4656         if (status < 0)
4657                 goto xdr_error;
4658         fattr->valid |= status;
4659
4660         status = -EIO;
4661         if (unlikely(bitmap[1]))
4662                 goto xdr_error;
4663
4664         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4665         if (status < 0)
4666                 goto xdr_error;
4667
4668         if (label) {
4669                 status = decode_attr_security_label(xdr, bitmap, label);
4670                 if (status < 0)
4671                         goto xdr_error;
4672                 fattr->valid |= status;
4673         }
4674
4675 xdr_error:
4676         dprintk("%s: xdr returned %d\n", __func__, -status);
4677         return status;
4678 }
4679
4680 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4681                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4682                 struct nfs4_label *label, const struct nfs_server *server)
4683 {
4684         unsigned int savep;
4685         uint32_t attrlen,
4686                  bitmap[3] = {0};
4687         int status;
4688
4689         status = decode_op_hdr(xdr, OP_GETATTR);
4690         if (status < 0)
4691                 goto xdr_error;
4692
4693         status = decode_attr_bitmap(xdr, bitmap);
4694         if (status < 0)
4695                 goto xdr_error;
4696
4697         status = decode_attr_length(xdr, &attrlen, &savep);
4698         if (status < 0)
4699                 goto xdr_error;
4700
4701         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4702                                         label, server);
4703         if (status < 0)
4704                 goto xdr_error;
4705
4706         status = verify_attr_len(xdr, savep, attrlen);
4707 xdr_error:
4708         dprintk("%s: xdr returned %d\n", __func__, -status);
4709         return status;
4710 }
4711
4712 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4713                 struct nfs4_label *label, const struct nfs_server *server)
4714 {
4715         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4716 }
4717
4718 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719                 const struct nfs_server *server)
4720 {
4721         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4722 }
4723
4724 /*
4725  * Decode potentially multiple layout types.
4726  */
4727 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4728                                     struct nfs_fsinfo *fsinfo)
4729 {
4730         __be32 *p;
4731         uint32_t i;
4732
4733         p = xdr_inline_decode(xdr, 4);
4734         if (unlikely(!p))
4735                 return -EIO;
4736         fsinfo->nlayouttypes = be32_to_cpup(p);
4737
4738         /* pNFS is not supported by the underlying file system */
4739         if (fsinfo->nlayouttypes == 0)
4740                 return 0;
4741
4742         /* Decode and set first layout type, move xdr->p past unused types */
4743         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4744         if (unlikely(!p))
4745                 return -EIO;
4746
4747         /* If we get too many, then just cap it at the max */
4748         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4749                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4750                         __func__, fsinfo->nlayouttypes);
4751                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4752         }
4753
4754         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4755                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4756         return 0;
4757 }
4758
4759 /*
4760  * The type of file system exported.
4761  * Note we must ensure that layouttype is set in any non-error case.
4762  */
4763 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4764                                 struct nfs_fsinfo *fsinfo)
4765 {
4766         int status = 0;
4767
4768         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4769         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4770                 return -EIO;
4771         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4772                 status = decode_pnfs_layout_types(xdr, fsinfo);
4773                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4774         }
4775         return status;
4776 }
4777
4778 /*
4779  * The prefered block size for layout directed io
4780  */
4781 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4782                                       uint32_t *res)
4783 {
4784         __be32 *p;
4785
4786         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4787         *res = 0;
4788         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4789                 p = xdr_inline_decode(xdr, 4);
4790                 if (unlikely(!p))
4791                         return -EIO;
4792                 *res = be32_to_cpup(p);
4793                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4794         }
4795         return 0;
4796 }
4797
4798 /*
4799  * The granularity of a CLONE operation.
4800  */
4801 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4802                                      uint32_t *res)
4803 {
4804         __be32 *p;
4805
4806         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4807         *res = 0;
4808         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4809                 p = xdr_inline_decode(xdr, 4);
4810                 if (unlikely(!p))
4811                         return -EIO;
4812                 *res = be32_to_cpup(p);
4813                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4814         }
4815         return 0;
4816 }
4817
4818 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4819 {
4820         unsigned int savep;
4821         uint32_t attrlen, bitmap[3];
4822         int status;
4823
4824         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4825                 goto xdr_error;
4826         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4827                 goto xdr_error;
4828         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4829                 goto xdr_error;
4830
4831         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4832
4833         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4834                 goto xdr_error;
4835         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4836                 goto xdr_error;
4837         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4838                 goto xdr_error;
4839         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4840         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4841                 goto xdr_error;
4842         fsinfo->wtpref = fsinfo->wtmax;
4843
4844         status = -EIO;
4845         if (unlikely(bitmap[0]))
4846                 goto xdr_error;
4847
4848         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4849         if (status != 0)
4850                 goto xdr_error;
4851         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4852         if (status != 0)
4853                 goto xdr_error;
4854
4855         status = -EIO;
4856         if (unlikely(bitmap[1]))
4857                 goto xdr_error;
4858
4859         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4860         if (status)
4861                 goto xdr_error;
4862         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4863         if (status)
4864                 goto xdr_error;
4865
4866         status = verify_attr_len(xdr, savep, attrlen);
4867 xdr_error:
4868         dprintk("%s: xdr returned %d!\n", __func__, -status);
4869         return status;
4870 }
4871
4872 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4873 {
4874         __be32 *p;
4875         uint32_t len;
4876         int status;
4877
4878         /* Zero handle first to allow comparisons */
4879         memset(fh, 0, sizeof(*fh));
4880
4881         status = decode_op_hdr(xdr, OP_GETFH);
4882         if (status)
4883                 return status;
4884
4885         p = xdr_inline_decode(xdr, 4);
4886         if (unlikely(!p))
4887                 return -EIO;
4888         len = be32_to_cpup(p);
4889         if (len > NFS4_FHSIZE)
4890                 return -EIO;
4891         fh->size = len;
4892         p = xdr_inline_decode(xdr, len);
4893         if (unlikely(!p))
4894                 return -EIO;
4895         memcpy(fh->data, p, len);
4896         return 0;
4897 }
4898
4899 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4900 {
4901         int status;
4902
4903         status = decode_op_hdr(xdr, OP_LINK);
4904         if (status)
4905                 return status;
4906         return decode_change_info(xdr, cinfo);
4907 }
4908
4909 /*
4910  * We create the owner, so we know a proper owner.id length is 4.
4911  */
4912 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4913 {
4914         uint64_t offset, length, clientid;
4915         __be32 *p;
4916         uint32_t namelen, type;
4917
4918         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4919         if (unlikely(!p))
4920                 return -EIO;
4921         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4922         p = xdr_decode_hyper(p, &length);
4923         type = be32_to_cpup(p++); /* 4 byte read */
4924         if (fl != NULL) { /* manipulate file lock */
4925                 fl->fl_start = (loff_t)offset;
4926                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4927                 if (length == ~(uint64_t)0)
4928                         fl->fl_end = OFFSET_MAX;
4929                 fl->fl_type = F_WRLCK;
4930                 if (type & 1)
4931                         fl->fl_type = F_RDLCK;
4932                 fl->fl_pid = 0;
4933         }
4934         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4935         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4936         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4937         if (likely(!p))
4938                 return -EIO;
4939         return -NFS4ERR_DENIED;
4940 }
4941
4942 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4943 {
4944         int status;
4945
4946         status = decode_op_hdr(xdr, OP_LOCK);
4947         if (status == -EIO)
4948                 goto out;
4949         if (status == 0) {
4950                 status = decode_lock_stateid(xdr, &res->stateid);
4951                 if (unlikely(status))
4952                         goto out;
4953         } else if (status == -NFS4ERR_DENIED)
4954                 status = decode_lock_denied(xdr, NULL);
4955         if (res->open_seqid != NULL)
4956                 nfs_increment_open_seqid(status, res->open_seqid);
4957         nfs_increment_lock_seqid(status, res->lock_seqid);
4958 out:
4959         return status;
4960 }
4961
4962 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4963 {
4964         int status;
4965         status = decode_op_hdr(xdr, OP_LOCKT);
4966         if (status == -NFS4ERR_DENIED)
4967                 return decode_lock_denied(xdr, res->denied);
4968         return status;
4969 }
4970
4971 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4972 {
4973         int status;
4974
4975         status = decode_op_hdr(xdr, OP_LOCKU);
4976         if (status != -EIO)
4977                 nfs_increment_lock_seqid(status, res->seqid);
4978         if (status == 0)
4979                 status = decode_lock_stateid(xdr, &res->stateid);
4980         return status;
4981 }
4982
4983 static int decode_release_lockowner(struct xdr_stream *xdr)
4984 {
4985         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4986 }
4987
4988 static int decode_lookup(struct xdr_stream *xdr)
4989 {
4990         return decode_op_hdr(xdr, OP_LOOKUP);
4991 }
4992
4993 static int decode_lookupp(struct xdr_stream *xdr)
4994 {
4995         return decode_op_hdr(xdr, OP_LOOKUPP);
4996 }
4997
4998 /* This is too sick! */
4999 static int decode_space_limit(struct xdr_stream *xdr,
5000                 unsigned long *pagemod_limit)
5001 {
5002         __be32 *p;
5003         uint32_t limit_type, nblocks, blocksize;
5004         u64 maxsize = 0;
5005
5006         p = xdr_inline_decode(xdr, 12);
5007         if (unlikely(!p))
5008                 return -EIO;
5009         limit_type = be32_to_cpup(p++);
5010         switch (limit_type) {
5011         case NFS4_LIMIT_SIZE:
5012                 xdr_decode_hyper(p, &maxsize);
5013                 break;
5014         case NFS4_LIMIT_BLOCKS:
5015                 nblocks = be32_to_cpup(p++);
5016                 blocksize = be32_to_cpup(p);
5017                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5018         }
5019         maxsize >>= PAGE_SHIFT;
5020         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5021         return 0;
5022 }
5023
5024 static int decode_rw_delegation(struct xdr_stream *xdr,
5025                 uint32_t delegation_type,
5026                 struct nfs_openres *res)
5027 {
5028         __be32 *p;
5029         int status;
5030
5031         status = decode_delegation_stateid(xdr, &res->delegation);
5032         if (unlikely(status))
5033                 return status;
5034         p = xdr_inline_decode(xdr, 4);
5035         if (unlikely(!p))
5036                 return -EIO;
5037         res->do_recall = be32_to_cpup(p);
5038
5039         switch (delegation_type) {
5040         case NFS4_OPEN_DELEGATE_READ:
5041                 res->delegation_type = FMODE_READ;
5042                 break;
5043         case NFS4_OPEN_DELEGATE_WRITE:
5044                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5045                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5046                                 return -EIO;
5047         }
5048         return decode_ace(xdr, NULL);
5049 }
5050
5051 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5052 {
5053         __be32 *p;
5054         uint32_t why_no_delegation;
5055
5056         p = xdr_inline_decode(xdr, 4);
5057         if (unlikely(!p))
5058                 return -EIO;
5059         why_no_delegation = be32_to_cpup(p);
5060         switch (why_no_delegation) {
5061                 case WND4_CONTENTION:
5062                 case WND4_RESOURCE:
5063                         xdr_inline_decode(xdr, 4);
5064                         /* Ignore for now */
5065         }
5066         return 0;
5067 }
5068
5069 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5070 {
5071         __be32 *p;
5072         uint32_t delegation_type;
5073
5074         p = xdr_inline_decode(xdr, 4);
5075         if (unlikely(!p))
5076                 return -EIO;
5077         delegation_type = be32_to_cpup(p);
5078         res->delegation_type = 0;
5079         switch (delegation_type) {
5080         case NFS4_OPEN_DELEGATE_NONE:
5081                 return 0;
5082         case NFS4_OPEN_DELEGATE_READ:
5083         case NFS4_OPEN_DELEGATE_WRITE:
5084                 return decode_rw_delegation(xdr, delegation_type, res);
5085         case NFS4_OPEN_DELEGATE_NONE_EXT:
5086                 return decode_no_delegation(xdr, res);
5087         }
5088         return -EIO;
5089 }
5090
5091 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5092 {
5093         __be32 *p;
5094         uint32_t savewords, bmlen, i;
5095         int status;
5096
5097         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5098                 return status;
5099         nfs_increment_open_seqid(status, res->seqid);
5100         if (status)
5101                 return status;
5102         status = decode_open_stateid(xdr, &res->stateid);
5103         if (unlikely(status))
5104                 return status;
5105
5106         decode_change_info(xdr, &res->cinfo);
5107
5108         p = xdr_inline_decode(xdr, 8);
5109         if (unlikely(!p))
5110                 return -EIO;
5111         res->rflags = be32_to_cpup(p++);
5112         bmlen = be32_to_cpup(p);
5113         if (bmlen > 10)
5114                 goto xdr_error;
5115
5116         p = xdr_inline_decode(xdr, bmlen << 2);
5117         if (unlikely(!p))
5118                 return -EIO;
5119         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5120         for (i = 0; i < savewords; ++i)
5121                 res->attrset[i] = be32_to_cpup(p++);
5122         for (; i < NFS4_BITMAP_SIZE; i++)
5123                 res->attrset[i] = 0;
5124
5125         return decode_delegation(xdr, res);
5126 xdr_error:
5127         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5128         return -EIO;
5129 }
5130
5131 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5132 {
5133         int status;
5134
5135         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5136         if (status != -EIO)
5137                 nfs_increment_open_seqid(status, res->seqid);
5138         if (!status)
5139                 status = decode_open_stateid(xdr, &res->stateid);
5140         return status;
5141 }
5142
5143 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5144 {
5145         int status;
5146
5147         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5148         if (status != -EIO)
5149                 nfs_increment_open_seqid(status, res->seqid);
5150         if (!status)
5151                 status = decode_open_stateid(xdr, &res->stateid);
5152         return status;
5153 }
5154
5155 static int decode_putfh(struct xdr_stream *xdr)
5156 {
5157         return decode_op_hdr(xdr, OP_PUTFH);
5158 }
5159
5160 static int decode_putrootfh(struct xdr_stream *xdr)
5161 {
5162         return decode_op_hdr(xdr, OP_PUTROOTFH);
5163 }
5164
5165 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5166                        struct nfs_pgio_res *res)
5167 {
5168         __be32 *p;
5169         uint32_t count, eof, recvd;
5170         int status;
5171
5172         status = decode_op_hdr(xdr, OP_READ);
5173         if (status)
5174                 return status;
5175         p = xdr_inline_decode(xdr, 8);
5176         if (unlikely(!p))
5177                 return -EIO;
5178         eof = be32_to_cpup(p++);
5179         count = be32_to_cpup(p);
5180         recvd = xdr_read_pages(xdr, count);
5181         if (count > recvd) {
5182                 dprintk("NFS: server cheating in read reply: "
5183                                 "count %u > recvd %u\n", count, recvd);
5184                 count = recvd;
5185                 eof = 0;
5186         }
5187         res->eof = eof;
5188         res->count = count;
5189         return 0;
5190 }
5191
5192 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5193 {
5194         int             status;
5195         __be32          verf[2];
5196
5197         status = decode_op_hdr(xdr, OP_READDIR);
5198         if (!status)
5199                 status = decode_verifier(xdr, readdir->verifier.data);
5200         if (unlikely(status))
5201                 return status;
5202         memcpy(verf, readdir->verifier.data, sizeof(verf));
5203         dprintk("%s: verifier = %08x:%08x\n",
5204                         __func__, verf[0], verf[1]);
5205         return xdr_read_pages(xdr, xdr->buf->page_len);
5206 }
5207
5208 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5209 {
5210         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5211         u32 len, recvd;
5212         __be32 *p;
5213         int status;
5214
5215         status = decode_op_hdr(xdr, OP_READLINK);
5216         if (status)
5217                 return status;
5218
5219         /* Convert length of symlink */
5220         p = xdr_inline_decode(xdr, 4);
5221         if (unlikely(!p))
5222                 return -EIO;
5223         len = be32_to_cpup(p);
5224         if (len >= rcvbuf->page_len || len <= 0) {
5225                 dprintk("nfs: server returned giant symlink!\n");
5226                 return -ENAMETOOLONG;
5227         }
5228         recvd = xdr_read_pages(xdr, len);
5229         if (recvd < len) {
5230                 dprintk("NFS: server cheating in readlink reply: "
5231                                 "count %u > recvd %u\n", len, recvd);
5232                 return -EIO;
5233         }
5234         /*
5235          * The XDR encode routine has set things up so that
5236          * the link text will be copied directly into the
5237          * buffer.  We just have to do overflow-checking,
5238          * and and null-terminate the text (the VFS expects
5239          * null-termination).
5240          */
5241         xdr_terminate_string(rcvbuf, len);
5242         return 0;
5243 }
5244
5245 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5246 {
5247         int status;
5248
5249         status = decode_op_hdr(xdr, OP_REMOVE);
5250         if (status)
5251                 goto out;
5252         status = decode_change_info(xdr, cinfo);
5253 out:
5254         return status;
5255 }
5256
5257 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5258               struct nfs4_change_info *new_cinfo)
5259 {
5260         int status;
5261
5262         status = decode_op_hdr(xdr, OP_RENAME);
5263         if (status)
5264                 goto out;
5265         if ((status = decode_change_info(xdr, old_cinfo)))
5266                 goto out;
5267         status = decode_change_info(xdr, new_cinfo);
5268 out:
5269         return status;
5270 }
5271
5272 static int decode_renew(struct xdr_stream *xdr)
5273 {
5274         return decode_op_hdr(xdr, OP_RENEW);
5275 }
5276
5277 static int
5278 decode_restorefh(struct xdr_stream *xdr)
5279 {
5280         return decode_op_hdr(xdr, OP_RESTOREFH);
5281 }
5282
5283 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5284                          struct nfs_getaclres *res)
5285 {
5286         unsigned int savep;
5287         uint32_t attrlen,
5288                  bitmap[3] = {0};
5289         int status;
5290         unsigned int pg_offset;
5291
5292         res->acl_len = 0;
5293         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5294                 goto out;
5295
5296         xdr_enter_page(xdr, xdr->buf->page_len);
5297
5298         /* Calculate the offset of the page data */
5299         pg_offset = xdr->buf->head[0].iov_len;
5300
5301         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5302                 goto out;
5303         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5304                 goto out;
5305
5306         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5307                 return -EIO;
5308         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5309
5310                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5311                  * are stored with the acl data to handle the problem of
5312                  * variable length bitmaps.*/
5313                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5314                 res->acl_len = attrlen;
5315
5316                 /* Check for receive buffer overflow */
5317                 if (res->acl_len > (xdr->nwords << 2) ||
5318                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5319                         res->acl_flags |= NFS4_ACL_TRUNC;
5320                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5321                                         attrlen, xdr->nwords << 2);
5322                 }
5323         } else
5324                 status = -EOPNOTSUPP;
5325
5326 out:
5327         return status;
5328 }
5329
5330 static int
5331 decode_savefh(struct xdr_stream *xdr)
5332 {
5333         return decode_op_hdr(xdr, OP_SAVEFH);
5334 }
5335
5336 static int decode_setattr(struct xdr_stream *xdr)
5337 {
5338         int status;
5339
5340         status = decode_op_hdr(xdr, OP_SETATTR);
5341         if (status)
5342                 return status;
5343         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5344                 return 0;
5345         return -EIO;
5346 }
5347
5348 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5349 {
5350         __be32 *p;
5351         uint32_t opnum;
5352         int32_t nfserr;
5353
5354         p = xdr_inline_decode(xdr, 8);
5355         if (unlikely(!p))
5356                 return -EIO;
5357         opnum = be32_to_cpup(p++);
5358         if (opnum != OP_SETCLIENTID) {
5359                 dprintk("nfs: decode_setclientid: Server returned operation"
5360                         " %d\n", opnum);
5361                 return -EIO;
5362         }
5363         nfserr = be32_to_cpup(p);
5364         if (nfserr == NFS_OK) {
5365                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5366                 if (unlikely(!p))
5367                         return -EIO;
5368                 p = xdr_decode_hyper(p, &res->clientid);
5369                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5370         } else if (nfserr == NFSERR_CLID_INUSE) {
5371                 uint32_t len;
5372
5373                 /* skip netid string */
5374                 p = xdr_inline_decode(xdr, 4);
5375                 if (unlikely(!p))
5376                         return -EIO;
5377                 len = be32_to_cpup(p);
5378                 p = xdr_inline_decode(xdr, len);
5379                 if (unlikely(!p))
5380                         return -EIO;
5381
5382                 /* skip uaddr string */
5383                 p = xdr_inline_decode(xdr, 4);
5384                 if (unlikely(!p))
5385                         return -EIO;
5386                 len = be32_to_cpup(p);
5387                 p = xdr_inline_decode(xdr, len);
5388                 if (unlikely(!p))
5389                         return -EIO;
5390                 return -NFSERR_CLID_INUSE;
5391         } else
5392                 return nfs4_stat_to_errno(nfserr);
5393
5394         return 0;
5395 }
5396
5397 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5398 {
5399         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5400 }
5401
5402 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5403 {
5404         __be32 *p;
5405         int status;
5406
5407         status = decode_op_hdr(xdr, OP_WRITE);
5408         if (status)
5409                 return status;
5410
5411         p = xdr_inline_decode(xdr, 8);
5412         if (unlikely(!p))
5413                 return -EIO;
5414         res->count = be32_to_cpup(p++);
5415         res->verf->committed = be32_to_cpup(p++);
5416         return decode_write_verifier(xdr, &res->verf->verifier);
5417 }
5418
5419 static int decode_delegreturn(struct xdr_stream *xdr)
5420 {
5421         return decode_op_hdr(xdr, OP_DELEGRETURN);
5422 }
5423
5424 static int decode_secinfo_gss(struct xdr_stream *xdr,
5425                               struct nfs4_secinfo4 *flavor)
5426 {
5427         u32 oid_len;
5428         __be32 *p;
5429
5430         p = xdr_inline_decode(xdr, 4);
5431         if (unlikely(!p))
5432                 return -EIO;
5433         oid_len = be32_to_cpup(p);
5434         if (oid_len > GSS_OID_MAX_LEN)
5435                 return -EINVAL;
5436
5437         p = xdr_inline_decode(xdr, oid_len);
5438         if (unlikely(!p))
5439                 return -EIO;
5440         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5441         flavor->flavor_info.oid.len = oid_len;
5442
5443         p = xdr_inline_decode(xdr, 8);
5444         if (unlikely(!p))
5445                 return -EIO;
5446         flavor->flavor_info.qop = be32_to_cpup(p++);
5447         flavor->flavor_info.service = be32_to_cpup(p);
5448
5449         return 0;
5450 }
5451
5452 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5453 {
5454         struct nfs4_secinfo4 *sec_flavor;
5455         unsigned int i, num_flavors;
5456         int status;
5457         __be32 *p;
5458
5459         p = xdr_inline_decode(xdr, 4);
5460         if (unlikely(!p))
5461                 return -EIO;
5462
5463         res->flavors->num_flavors = 0;
5464         num_flavors = be32_to_cpup(p);
5465
5466         for (i = 0; i < num_flavors; i++) {
5467                 sec_flavor = &res->flavors->flavors[i];
5468                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5469                         break;
5470
5471                 p = xdr_inline_decode(xdr, 4);
5472                 if (unlikely(!p))
5473                         return -EIO;
5474                 sec_flavor->flavor = be32_to_cpup(p);
5475
5476                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5477                         status = decode_secinfo_gss(xdr, sec_flavor);
5478                         if (status)
5479                                 goto out;
5480                 }
5481                 res->flavors->num_flavors++;
5482         }
5483
5484         status = 0;
5485 out:
5486         return status;
5487 }
5488
5489 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5490 {
5491         int status = decode_op_hdr(xdr, OP_SECINFO);
5492         if (status)
5493                 return status;
5494         return decode_secinfo_common(xdr, res);
5495 }
5496
5497 #if defined(CONFIG_NFS_V4_1)
5498 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5499 {
5500         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5501         if (status)
5502                 return status;
5503         return decode_secinfo_common(xdr, res);
5504 }
5505
5506 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5507 {
5508         __be32 *p;
5509         uint32_t bitmap_words;
5510         unsigned int i;
5511
5512         p = xdr_inline_decode(xdr, 4);
5513         if (!p)
5514                 return -EIO;
5515         bitmap_words = be32_to_cpup(p++);
5516         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5517                 return -EIO;
5518         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5519         for (i = 0; i < bitmap_words; i++)
5520                 op_map->u.words[i] = be32_to_cpup(p++);
5521
5522         return 0;
5523 }
5524
5525 static int decode_exchange_id(struct xdr_stream *xdr,
5526                               struct nfs41_exchange_id_res *res)
5527 {
5528         __be32 *p;
5529         uint32_t dummy;
5530         char *dummy_str;
5531         int status;
5532         uint32_t impl_id_count;
5533
5534         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5535         if (status)
5536                 return status;
5537
5538         p = xdr_inline_decode(xdr, 8);
5539         if (unlikely(!p))
5540                 return -EIO;
5541         xdr_decode_hyper(p, &res->clientid);
5542         p = xdr_inline_decode(xdr, 12);
5543         if (unlikely(!p))
5544                 return -EIO;
5545         res->seqid = be32_to_cpup(p++);
5546         res->flags = be32_to_cpup(p++);
5547
5548         res->state_protect.how = be32_to_cpup(p);
5549         switch (res->state_protect.how) {
5550         case SP4_NONE:
5551                 break;
5552         case SP4_MACH_CRED:
5553                 status = decode_op_map(xdr, &res->state_protect.enforce);
5554                 if (status)
5555                         return status;
5556                 status = decode_op_map(xdr, &res->state_protect.allow);
5557                 if (status)
5558                         return status;
5559                 break;
5560         default:
5561                 WARN_ON_ONCE(1);
5562                 return -EIO;
5563         }
5564
5565         /* server_owner4.so_minor_id */
5566         p = xdr_inline_decode(xdr, 8);
5567         if (unlikely(!p))
5568                 return -EIO;
5569         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5570
5571         /* server_owner4.so_major_id */
5572         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5573         if (unlikely(status))
5574                 return status;
5575         memcpy(res->server_owner->major_id, dummy_str, dummy);
5576         res->server_owner->major_id_sz = dummy;
5577
5578         /* server_scope4 */
5579         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5580         if (unlikely(status))
5581                 return status;
5582         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5583         res->server_scope->server_scope_sz = dummy;
5584
5585         /* Implementation Id */
5586         p = xdr_inline_decode(xdr, 4);
5587         if (unlikely(!p))
5588                 return -EIO;
5589         impl_id_count = be32_to_cpup(p++);
5590
5591         if (impl_id_count) {
5592                 /* nii_domain */
5593                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5594                 if (unlikely(status))
5595                         return status;
5596                 memcpy(res->impl_id->domain, dummy_str, dummy);
5597
5598                 /* nii_name */
5599                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5600                 if (unlikely(status))
5601                         return status;
5602                 memcpy(res->impl_id->name, dummy_str, dummy);
5603
5604                 /* nii_date */
5605                 p = xdr_inline_decode(xdr, 12);
5606                 if (unlikely(!p))
5607                         return -EIO;
5608                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5609                 res->impl_id->date.nseconds = be32_to_cpup(p);
5610
5611                 /* if there's more than one entry, ignore the rest */
5612         }
5613         return 0;
5614 }
5615
5616 static int decode_chan_attrs(struct xdr_stream *xdr,
5617                              struct nfs4_channel_attrs *attrs)
5618 {
5619         __be32 *p;
5620         u32 nr_attrs, val;
5621
5622         p = xdr_inline_decode(xdr, 28);
5623         if (unlikely(!p))
5624                 return -EIO;
5625         val = be32_to_cpup(p++);        /* headerpadsz */
5626         if (val)
5627                 return -EINVAL;         /* no support for header padding yet */
5628         attrs->max_rqst_sz = be32_to_cpup(p++);
5629         attrs->max_resp_sz = be32_to_cpup(p++);
5630         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5631         attrs->max_ops = be32_to_cpup(p++);
5632         attrs->max_reqs = be32_to_cpup(p++);
5633         nr_attrs = be32_to_cpup(p);
5634         if (unlikely(nr_attrs > 1)) {
5635                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5636                         "count %u\n", __func__, nr_attrs);
5637                 return -EINVAL;
5638         }
5639         if (nr_attrs == 1) {
5640                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5641                 if (unlikely(!p))
5642                         return -EIO;
5643         }
5644         return 0;
5645 }
5646
5647 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5648 {
5649         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5650 }
5651
5652 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5653                                 struct nfs41_bind_conn_to_session_res *res)
5654 {
5655         __be32 *p;
5656         int status;
5657
5658         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5659         if (!status)
5660                 status = decode_sessionid(xdr, &res->sessionid);
5661         if (unlikely(status))
5662                 return status;
5663
5664         /* dir flags, rdma mode bool */
5665         p = xdr_inline_decode(xdr, 8);
5666         if (unlikely(!p))
5667                 return -EIO;
5668
5669         res->dir = be32_to_cpup(p++);
5670         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5671                 return -EIO;
5672         if (be32_to_cpup(p) == 0)
5673                 res->use_conn_in_rdma_mode = false;
5674         else
5675                 res->use_conn_in_rdma_mode = true;
5676
5677         return 0;
5678 }
5679
5680 static int decode_create_session(struct xdr_stream *xdr,
5681                                  struct nfs41_create_session_res *res)
5682 {
5683         __be32 *p;
5684         int status;
5685
5686         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5687         if (!status)
5688                 status = decode_sessionid(xdr, &res->sessionid);
5689         if (unlikely(status))
5690                 return status;
5691
5692         /* seqid, flags */
5693         p = xdr_inline_decode(xdr, 8);
5694         if (unlikely(!p))
5695                 return -EIO;
5696         res->seqid = be32_to_cpup(p++);
5697         res->flags = be32_to_cpup(p);
5698
5699         /* Channel attributes */
5700         status = decode_chan_attrs(xdr, &res->fc_attrs);
5701         if (!status)
5702                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5703         return status;
5704 }
5705
5706 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5707 {
5708         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5709 }
5710
5711 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5712 {
5713         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5714 }
5715
5716 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5717 {
5718         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5719 }
5720 #endif /* CONFIG_NFS_V4_1 */
5721
5722 static int decode_sequence(struct xdr_stream *xdr,
5723                            struct nfs4_sequence_res *res,
5724                            struct rpc_rqst *rqstp)
5725 {
5726 #if defined(CONFIG_NFS_V4_1)
5727         struct nfs4_session *session;
5728         struct nfs4_sessionid id;
5729         u32 dummy;
5730         int status;
5731         __be32 *p;
5732
5733         if (res->sr_slot == NULL)
5734                 return 0;
5735         if (!res->sr_slot->table->session)
5736                 return 0;
5737
5738         status = decode_op_hdr(xdr, OP_SEQUENCE);
5739         if (!status)
5740                 status = decode_sessionid(xdr, &id);
5741         if (unlikely(status))
5742                 goto out_err;
5743
5744         /*
5745          * If the server returns different values for sessionID, slotID or
5746          * sequence number, the server is looney tunes.
5747          */
5748         status = -EREMOTEIO;
5749         session = res->sr_slot->table->session;
5750
5751         if (memcmp(id.data, session->sess_id.data,
5752                    NFS4_MAX_SESSIONID_LEN)) {
5753                 dprintk("%s Invalid session id\n", __func__);
5754                 goto out_err;
5755         }
5756
5757         p = xdr_inline_decode(xdr, 20);
5758         if (unlikely(!p))
5759                 goto out_overflow;
5760
5761         /* seqid */
5762         dummy = be32_to_cpup(p++);
5763         if (dummy != res->sr_slot->seq_nr) {
5764                 dprintk("%s Invalid sequence number\n", __func__);
5765                 goto out_err;
5766         }
5767         /* slot id */
5768         dummy = be32_to_cpup(p++);
5769         if (dummy != res->sr_slot->slot_nr) {
5770                 dprintk("%s Invalid slot id\n", __func__);
5771                 goto out_err;
5772         }
5773         /* highest slot id */
5774         res->sr_highest_slotid = be32_to_cpup(p++);
5775         /* target highest slot id */
5776         res->sr_target_highest_slotid = be32_to_cpup(p++);
5777         /* result flags */
5778         res->sr_status_flags = be32_to_cpup(p);
5779         status = 0;
5780 out_err:
5781         res->sr_status = status;
5782         return status;
5783 out_overflow:
5784         status = -EIO;
5785         goto out_err;
5786 #else  /* CONFIG_NFS_V4_1 */
5787         return 0;
5788 #endif /* CONFIG_NFS_V4_1 */
5789 }
5790
5791 #if defined(CONFIG_NFS_V4_1)
5792 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5793 {
5794         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5795         return decode_stateid(xdr, stateid);
5796 }
5797
5798 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5799                                 struct nfs4_getdeviceinfo_res *res)
5800 {
5801         struct pnfs_device *pdev = res->pdev;
5802         __be32 *p;
5803         uint32_t len, type;
5804         int status;
5805
5806         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5807         if (status) {
5808                 if (status == -ETOOSMALL) {
5809                         p = xdr_inline_decode(xdr, 4);
5810                         if (unlikely(!p))
5811                                 return -EIO;
5812                         pdev->mincount = be32_to_cpup(p);
5813                         dprintk("%s: Min count too small. mincnt = %u\n",
5814                                 __func__, pdev->mincount);
5815                 }
5816                 return status;
5817         }
5818
5819         p = xdr_inline_decode(xdr, 8);
5820         if (unlikely(!p))
5821                 return -EIO;
5822         type = be32_to_cpup(p++);
5823         if (type != pdev->layout_type) {
5824                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5825                         __func__, pdev->layout_type, type);
5826                 return -EINVAL;
5827         }
5828         /*
5829          * Get the length of the opaque device_addr4. xdr_read_pages places
5830          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5831          * and places the remaining xdr data in xdr_buf->tail
5832          */
5833         pdev->mincount = be32_to_cpup(p);
5834         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5835                 return -EIO;
5836
5837         /* Parse notification bitmap, verifying that it is zero. */
5838         p = xdr_inline_decode(xdr, 4);
5839         if (unlikely(!p))
5840                 return -EIO;
5841         len = be32_to_cpup(p);
5842         if (len) {
5843                 uint32_t i;
5844
5845                 p = xdr_inline_decode(xdr, 4 * len);
5846                 if (unlikely(!p))
5847                         return -EIO;
5848
5849                 res->notification = be32_to_cpup(p++);
5850                 for (i = 1; i < len; i++) {
5851                         if (be32_to_cpup(p++)) {
5852                                 dprintk("%s: unsupported notification\n",
5853                                         __func__);
5854                                 return -EIO;
5855                         }
5856                 }
5857         }
5858         return 0;
5859 }
5860
5861 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5862                             struct nfs4_layoutget_res *res)
5863 {
5864         __be32 *p;
5865         int status;
5866         u32 layout_count;
5867         u32 recvd;
5868
5869         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5870         if (status)
5871                 goto out;
5872         p = xdr_inline_decode(xdr, 4);
5873         if (unlikely(!p))
5874                 goto out_overflow;
5875         res->return_on_close = be32_to_cpup(p);
5876         decode_layout_stateid(xdr, &res->stateid);
5877         p = xdr_inline_decode(xdr, 4);
5878         if (unlikely(!p))
5879                 goto out_overflow;
5880         layout_count = be32_to_cpup(p);
5881         if (!layout_count) {
5882                 dprintk("%s: server responded with empty layout array\n",
5883                         __func__);
5884                 status = -EINVAL;
5885                 goto out;
5886         }
5887
5888         p = xdr_inline_decode(xdr, 28);
5889         if (unlikely(!p))
5890                 goto out_overflow;
5891         p = xdr_decode_hyper(p, &res->range.offset);
5892         p = xdr_decode_hyper(p, &res->range.length);
5893         res->range.iomode = be32_to_cpup(p++);
5894         res->type = be32_to_cpup(p++);
5895         res->layoutp->len = be32_to_cpup(p);
5896
5897         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5898                 __func__,
5899                 (unsigned long)res->range.offset,
5900                 (unsigned long)res->range.length,
5901                 res->range.iomode,
5902                 res->type,
5903                 res->layoutp->len);
5904
5905         recvd = xdr_read_pages(xdr, res->layoutp->len);
5906         if (res->layoutp->len > recvd) {
5907                 dprintk("NFS: server cheating in layoutget reply: "
5908                                 "layout len %u > recvd %u\n",
5909                                 res->layoutp->len, recvd);
5910                 status = -EINVAL;
5911                 goto out;
5912         }
5913
5914         if (layout_count > 1) {
5915                 /* We only handle a length one array at the moment.  Any
5916                  * further entries are just ignored.  Note that this means
5917                  * the client may see a response that is less than the
5918                  * minimum it requested.
5919                  */
5920                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5921                         __func__, layout_count);
5922         }
5923
5924 out:
5925         res->status = status;
5926         return status;
5927 out_overflow:
5928         status = -EIO;
5929         goto out;
5930 }
5931
5932 static int decode_layoutreturn(struct xdr_stream *xdr,
5933                                struct nfs4_layoutreturn_res *res)
5934 {
5935         __be32 *p;
5936         int status;
5937
5938         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5939         if (status)
5940                 return status;
5941         p = xdr_inline_decode(xdr, 4);
5942         if (unlikely(!p))
5943                 return -EIO;
5944         res->lrs_present = be32_to_cpup(p);
5945         if (res->lrs_present)
5946                 status = decode_layout_stateid(xdr, &res->stateid);
5947         else
5948                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5949         return status;
5950 }
5951
5952 static int decode_layoutcommit(struct xdr_stream *xdr,
5953                                struct rpc_rqst *req,
5954                                struct nfs4_layoutcommit_res *res)
5955 {
5956         __be32 *p;
5957         __u32 sizechanged;
5958         int status;
5959
5960         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5961         res->status = status;
5962         if (status)
5963                 return status;
5964
5965         p = xdr_inline_decode(xdr, 4);
5966         if (unlikely(!p))
5967                 return -EIO;
5968         sizechanged = be32_to_cpup(p);
5969
5970         if (sizechanged) {
5971                 /* throw away new size */
5972                 p = xdr_inline_decode(xdr, 8);
5973                 if (unlikely(!p))
5974                         return -EIO;
5975         }
5976         return 0;
5977 }
5978
5979 static int decode_test_stateid(struct xdr_stream *xdr,
5980                                struct nfs41_test_stateid_res *res)
5981 {
5982         __be32 *p;
5983         int status;
5984         int num_res;
5985
5986         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5987         if (status)
5988                 return status;
5989
5990         p = xdr_inline_decode(xdr, 4);
5991         if (unlikely(!p))
5992                 return -EIO;
5993         num_res = be32_to_cpup(p++);
5994         if (num_res != 1)
5995                 return -EIO;
5996
5997         p = xdr_inline_decode(xdr, 4);
5998         if (unlikely(!p))
5999                 return -EIO;
6000         res->status = be32_to_cpup(p++);
6001
6002         return status;
6003 }
6004
6005 static int decode_free_stateid(struct xdr_stream *xdr,
6006                                struct nfs41_free_stateid_res *res)
6007 {
6008         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6009         return res->status;
6010 }
6011 #else
6012 static inline
6013 int decode_layoutreturn(struct xdr_stream *xdr,
6014                                struct nfs4_layoutreturn_res *res)
6015 {
6016         return 0;
6017 }
6018
6019 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6020                             struct nfs4_layoutget_res *res)
6021 {
6022         return 0;
6023 }
6024
6025 #endif /* CONFIG_NFS_V4_1 */
6026
6027 /*
6028  * END OF "GENERIC" DECODE ROUTINES.
6029  */
6030
6031 /*
6032  * Decode OPEN_DOWNGRADE response
6033  */
6034 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6035                                        struct xdr_stream *xdr,
6036                                        void *data)
6037 {
6038         struct nfs_closeres *res = data;
6039         struct compound_hdr hdr;
6040         int status;
6041
6042         status = decode_compound_hdr(xdr, &hdr);
6043         if (status)
6044                 goto out;
6045         status = decode_sequence(xdr, &res->seq_res, rqstp);
6046         if (status)
6047                 goto out;
6048         status = decode_putfh(xdr);
6049         if (status)
6050                 goto out;
6051         if (res->lr_res) {
6052                 status = decode_layoutreturn(xdr, res->lr_res);
6053                 res->lr_ret = status;
6054                 if (status)
6055                         goto out;
6056         }
6057         status = decode_open_downgrade(xdr, res);
6058 out:
6059         return status;
6060 }
6061
6062 /*
6063  * Decode ACCESS response
6064  */
6065 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6066                                void *data)
6067 {
6068         struct nfs4_accessres *res = data;
6069         struct compound_hdr hdr;
6070         int status;
6071
6072         status = decode_compound_hdr(xdr, &hdr);
6073         if (status)
6074                 goto out;
6075         status = decode_sequence(xdr, &res->seq_res, rqstp);
6076         if (status)
6077                 goto out;
6078         status = decode_putfh(xdr);
6079         if (status != 0)
6080                 goto out;
6081         status = decode_access(xdr, &res->supported, &res->access);
6082         if (status != 0)
6083                 goto out;
6084         if (res->fattr)
6085                 decode_getfattr(xdr, res->fattr, res->server);
6086 out:
6087         return status;
6088 }
6089
6090 /*
6091  * Decode LOOKUP response
6092  */
6093 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094                                void *data)
6095 {
6096         struct nfs4_lookup_res *res = data;
6097         struct compound_hdr hdr;
6098         int status;
6099
6100         status = decode_compound_hdr(xdr, &hdr);
6101         if (status)
6102                 goto out;
6103         status = decode_sequence(xdr, &res->seq_res, rqstp);
6104         if (status)
6105                 goto out;
6106         status = decode_putfh(xdr);
6107         if (status)
6108                 goto out;
6109         status = decode_lookup(xdr);
6110         if (status)
6111                 goto out;
6112         status = decode_getfh(xdr, res->fh);
6113         if (status)
6114                 goto out;
6115         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6116 out:
6117         return status;
6118 }
6119
6120 /*
6121  * Decode LOOKUPP response
6122  */
6123 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6124                 void *data)
6125 {
6126         struct nfs4_lookupp_res *res = data;
6127         struct compound_hdr hdr;
6128         int status;
6129
6130         status = decode_compound_hdr(xdr, &hdr);
6131         if (status)
6132                 goto out;
6133         status = decode_sequence(xdr, &res->seq_res, rqstp);
6134         if (status)
6135                 goto out;
6136         status = decode_putfh(xdr);
6137         if (status)
6138                 goto out;
6139         status = decode_lookupp(xdr);
6140         if (status)
6141                 goto out;
6142         status = decode_getfh(xdr, res->fh);
6143         if (status)
6144                 goto out;
6145         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6146 out:
6147         return status;
6148 }
6149
6150 /*
6151  * Decode LOOKUP_ROOT response
6152  */
6153 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6154                                     struct xdr_stream *xdr,
6155                                     void *data)
6156 {
6157         struct nfs4_lookup_res *res = data;
6158         struct compound_hdr hdr;
6159         int status;
6160
6161         status = decode_compound_hdr(xdr, &hdr);
6162         if (status)
6163                 goto out;
6164         status = decode_sequence(xdr, &res->seq_res, rqstp);
6165         if (status)
6166                 goto out;
6167         status = decode_putrootfh(xdr);
6168         if (status)
6169                 goto out;
6170         status = decode_getfh(xdr, res->fh);
6171         if (status == 0)
6172                 status = decode_getfattr_label(xdr, res->fattr,
6173                                                 res->label, res->server);
6174 out:
6175         return status;
6176 }
6177
6178 /*
6179  * Decode REMOVE response
6180  */
6181 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6182                                void *data)
6183 {
6184         struct nfs_removeres *res = data;
6185         struct compound_hdr hdr;
6186         int status;
6187
6188         status = decode_compound_hdr(xdr, &hdr);
6189         if (status)
6190                 goto out;
6191         status = decode_sequence(xdr, &res->seq_res, rqstp);
6192         if (status)
6193                 goto out;
6194         status = decode_putfh(xdr);
6195         if (status)
6196                 goto out;
6197         status = decode_remove(xdr, &res->cinfo);
6198 out:
6199         return status;
6200 }
6201
6202 /*
6203  * Decode RENAME response
6204  */
6205 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6206                                void *data)
6207 {
6208         struct nfs_renameres *res = data;
6209         struct compound_hdr hdr;
6210         int status;
6211
6212         status = decode_compound_hdr(xdr, &hdr);
6213         if (status)
6214                 goto out;
6215         status = decode_sequence(xdr, &res->seq_res, rqstp);
6216         if (status)
6217                 goto out;
6218         status = decode_putfh(xdr);
6219         if (status)
6220                 goto out;
6221         status = decode_savefh(xdr);
6222         if (status)
6223                 goto out;
6224         status = decode_putfh(xdr);
6225         if (status)
6226                 goto out;
6227         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6228 out:
6229         return status;
6230 }
6231
6232 /*
6233  * Decode LINK response
6234  */
6235 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6236                              void *data)
6237 {
6238         struct nfs4_link_res *res = data;
6239         struct compound_hdr hdr;
6240         int status;
6241
6242         status = decode_compound_hdr(xdr, &hdr);
6243         if (status)
6244                 goto out;
6245         status = decode_sequence(xdr, &res->seq_res, rqstp);
6246         if (status)
6247                 goto out;
6248         status = decode_putfh(xdr);
6249         if (status)
6250                 goto out;
6251         status = decode_savefh(xdr);
6252         if (status)
6253                 goto out;
6254         status = decode_putfh(xdr);
6255         if (status)
6256                 goto out;
6257         status = decode_link(xdr, &res->cinfo);
6258         if (status)
6259                 goto out;
6260         /*
6261          * Note order: OP_LINK leaves the directory as the current
6262          *             filehandle.
6263          */
6264         status = decode_restorefh(xdr);
6265         if (status)
6266                 goto out;
6267         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6268 out:
6269         return status;
6270 }
6271
6272 /*
6273  * Decode CREATE response
6274  */
6275 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6276                                void *data)
6277 {
6278         struct nfs4_create_res *res = data;
6279         struct compound_hdr hdr;
6280         int status;
6281
6282         status = decode_compound_hdr(xdr, &hdr);
6283         if (status)
6284                 goto out;
6285         status = decode_sequence(xdr, &res->seq_res, rqstp);
6286         if (status)
6287                 goto out;
6288         status = decode_putfh(xdr);
6289         if (status)
6290                 goto out;
6291         status = decode_create(xdr, &res->dir_cinfo);
6292         if (status)
6293                 goto out;
6294         status = decode_getfh(xdr, res->fh);
6295         if (status)
6296                 goto out;
6297         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6298 out:
6299         return status;
6300 }
6301
6302 /*
6303  * Decode SYMLINK response
6304  */
6305 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6306                                 void *res)
6307 {
6308         return nfs4_xdr_dec_create(rqstp, xdr, res);
6309 }
6310
6311 /*
6312  * Decode GETATTR response
6313  */
6314 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6315                                 void *data)
6316 {
6317         struct nfs4_getattr_res *res = data;
6318         struct compound_hdr hdr;
6319         int status;
6320
6321         status = decode_compound_hdr(xdr, &hdr);
6322         if (status)
6323                 goto out;
6324         status = decode_sequence(xdr, &res->seq_res, rqstp);
6325         if (status)
6326                 goto out;
6327         status = decode_putfh(xdr);
6328         if (status)
6329                 goto out;
6330         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6331 out:
6332         return status;
6333 }
6334
6335 /*
6336  * Encode an SETACL request
6337  */
6338 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6339                                 const void *data)
6340 {
6341         const struct nfs_setaclargs *args = data;
6342         struct compound_hdr hdr = {
6343                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6344         };
6345
6346         encode_compound_hdr(xdr, req, &hdr);
6347         encode_sequence(xdr, &args->seq_args, &hdr);
6348         encode_putfh(xdr, args->fh, &hdr);
6349         encode_setacl(xdr, args, &hdr);
6350         encode_nops(&hdr);
6351 }
6352
6353 /*
6354  * Decode SETACL response
6355  */
6356 static int
6357 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6358                     void *data)
6359 {
6360         struct nfs_setaclres *res = data;
6361         struct compound_hdr hdr;
6362         int status;
6363
6364         status = decode_compound_hdr(xdr, &hdr);
6365         if (status)
6366                 goto out;
6367         status = decode_sequence(xdr, &res->seq_res, rqstp);
6368         if (status)
6369                 goto out;
6370         status = decode_putfh(xdr);
6371         if (status)
6372                 goto out;
6373         status = decode_setattr(xdr);
6374 out:
6375         return status;
6376 }
6377
6378 /*
6379  * Decode GETACL response
6380  */
6381 static int
6382 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6383                     void *data)
6384 {
6385         struct nfs_getaclres *res = data;
6386         struct compound_hdr hdr;
6387         int status;
6388
6389         if (res->acl_scratch != NULL) {
6390                 void *p = page_address(res->acl_scratch);
6391                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6392         }
6393         status = decode_compound_hdr(xdr, &hdr);
6394         if (status)
6395                 goto out;
6396         status = decode_sequence(xdr, &res->seq_res, rqstp);
6397         if (status)
6398                 goto out;
6399         status = decode_putfh(xdr);
6400         if (status)
6401                 goto out;
6402         status = decode_getacl(xdr, rqstp, res);
6403
6404 out:
6405         return status;
6406 }
6407
6408 /*
6409  * Decode CLOSE response
6410  */
6411 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6412                               void *data)
6413 {
6414         struct nfs_closeres *res = data;
6415         struct compound_hdr hdr;
6416         int status;
6417
6418         status = decode_compound_hdr(xdr, &hdr);
6419         if (status)
6420                 goto out;
6421         status = decode_sequence(xdr, &res->seq_res, rqstp);
6422         if (status)
6423                 goto out;
6424         status = decode_putfh(xdr);
6425         if (status)
6426                 goto out;
6427         if (res->lr_res) {
6428                 status = decode_layoutreturn(xdr, res->lr_res);
6429                 res->lr_ret = status;
6430                 if (status)
6431                         goto out;
6432         }
6433         if (res->fattr != NULL) {
6434                 status = decode_getfattr(xdr, res->fattr, res->server);
6435                 if (status != 0)
6436                         goto out;
6437         }
6438         status = decode_close(xdr, res);
6439 out:
6440         return status;
6441 }
6442
6443 /*
6444  * Decode OPEN response
6445  */
6446 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6447                              void *data)
6448 {
6449         struct nfs_openres *res = data;
6450         struct compound_hdr hdr;
6451         int status;
6452
6453         status = decode_compound_hdr(xdr, &hdr);
6454         if (status)
6455                 goto out;
6456         status = decode_sequence(xdr, &res->seq_res, rqstp);
6457         if (status)
6458                 goto out;
6459         status = decode_putfh(xdr);
6460         if (status)
6461                 goto out;
6462         status = decode_open(xdr, res);
6463         if (status)
6464                 goto out;
6465         status = decode_getfh(xdr, &res->fh);
6466         if (status)
6467                 goto out;
6468         if (res->access_request)
6469                 decode_access(xdr, &res->access_supported, &res->access_result);
6470         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6471         if (res->lg_res)
6472                 decode_layoutget(xdr, rqstp, res->lg_res);
6473 out:
6474         return status;
6475 }
6476
6477 /*
6478  * Decode OPEN_CONFIRM response
6479  */
6480 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6481                                      struct xdr_stream *xdr,
6482                                      void *data)
6483 {
6484         struct nfs_open_confirmres *res = data;
6485         struct compound_hdr hdr;
6486         int status;
6487
6488         status = decode_compound_hdr(xdr, &hdr);
6489         if (status)
6490                 goto out;
6491         status = decode_putfh(xdr);
6492         if (status)
6493                 goto out;
6494         status = decode_open_confirm(xdr, res);
6495 out:
6496         return status;
6497 }
6498
6499 /*
6500  * Decode OPEN response
6501  */
6502 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6503                                     struct xdr_stream *xdr,
6504                                     void *data)
6505 {
6506         struct nfs_openres *res = data;
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (status)
6512                 goto out;
6513         status = decode_sequence(xdr, &res->seq_res, rqstp);
6514         if (status)
6515                 goto out;
6516         status = decode_putfh(xdr);
6517         if (status)
6518                 goto out;
6519         status = decode_open(xdr, res);
6520         if (status)
6521                 goto out;
6522         if (res->access_request)
6523                 decode_access(xdr, &res->access_supported, &res->access_result);
6524         decode_getfattr(xdr, res->f_attr, res->server);
6525         if (res->lg_res)
6526                 decode_layoutget(xdr, rqstp, res->lg_res);
6527 out:
6528         return status;
6529 }
6530
6531 /*
6532  * Decode SETATTR response
6533  */
6534 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6535                                 struct xdr_stream *xdr,
6536                                 void *data)
6537 {
6538         struct nfs_setattrres *res = data;
6539         struct compound_hdr hdr;
6540         int status;
6541
6542         status = decode_compound_hdr(xdr, &hdr);
6543         if (status)
6544                 goto out;
6545         status = decode_sequence(xdr, &res->seq_res, rqstp);
6546         if (status)
6547                 goto out;
6548         status = decode_putfh(xdr);
6549         if (status)
6550                 goto out;
6551         status = decode_setattr(xdr);
6552         if (status)
6553                 goto out;
6554         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6555 out:
6556         return status;
6557 }
6558
6559 /*
6560  * Decode LOCK response
6561  */
6562 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6563                              void *data)
6564 {
6565         struct nfs_lock_res *res = data;
6566         struct compound_hdr hdr;
6567         int status;
6568
6569         status = decode_compound_hdr(xdr, &hdr);
6570         if (status)
6571                 goto out;
6572         status = decode_sequence(xdr, &res->seq_res, rqstp);
6573         if (status)
6574                 goto out;
6575         status = decode_putfh(xdr);
6576         if (status)
6577                 goto out;
6578         status = decode_lock(xdr, res);
6579 out:
6580         return status;
6581 }
6582
6583 /*
6584  * Decode LOCKT response
6585  */
6586 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6587                               void *data)
6588 {
6589         struct nfs_lockt_res *res = data;
6590         struct compound_hdr hdr;
6591         int status;
6592
6593         status = decode_compound_hdr(xdr, &hdr);
6594         if (status)
6595                 goto out;
6596         status = decode_sequence(xdr, &res->seq_res, rqstp);
6597         if (status)
6598                 goto out;
6599         status = decode_putfh(xdr);
6600         if (status)
6601                 goto out;
6602         status = decode_lockt(xdr, res);
6603 out:
6604         return status;
6605 }
6606
6607 /*
6608  * Decode LOCKU response
6609  */
6610 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6611                               void *data)
6612 {
6613         struct nfs_locku_res *res = data;
6614         struct compound_hdr hdr;
6615         int status;
6616
6617         status = decode_compound_hdr(xdr, &hdr);
6618         if (status)
6619                 goto out;
6620         status = decode_sequence(xdr, &res->seq_res, rqstp);
6621         if (status)
6622                 goto out;
6623         status = decode_putfh(xdr);
6624         if (status)
6625                 goto out;
6626         status = decode_locku(xdr, res);
6627 out:
6628         return status;
6629 }
6630
6631 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6632                                           struct xdr_stream *xdr, void *dummy)
6633 {
6634         struct compound_hdr hdr;
6635         int status;
6636
6637         status = decode_compound_hdr(xdr, &hdr);
6638         if (!status)
6639                 status = decode_release_lockowner(xdr);
6640         return status;
6641 }
6642
6643 /*
6644  * Decode READLINK response
6645  */
6646 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6647                                  struct xdr_stream *xdr,
6648                                  void *data)
6649 {
6650         struct nfs4_readlink_res *res = data;
6651         struct compound_hdr hdr;
6652         int status;
6653
6654         status = decode_compound_hdr(xdr, &hdr);
6655         if (status)
6656                 goto out;
6657         status = decode_sequence(xdr, &res->seq_res, rqstp);
6658         if (status)
6659                 goto out;
6660         status = decode_putfh(xdr);
6661         if (status)
6662                 goto out;
6663         status = decode_readlink(xdr, rqstp);
6664 out:
6665         return status;
6666 }
6667
6668 /*
6669  * Decode READDIR response
6670  */
6671 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6672                                 void *data)
6673 {
6674         struct nfs4_readdir_res *res = data;
6675         struct compound_hdr hdr;
6676         int status;
6677
6678         status = decode_compound_hdr(xdr, &hdr);
6679         if (status)
6680                 goto out;
6681         status = decode_sequence(xdr, &res->seq_res, rqstp);
6682         if (status)
6683                 goto out;
6684         status = decode_putfh(xdr);
6685         if (status)
6686                 goto out;
6687         status = decode_readdir(xdr, rqstp, res);
6688 out:
6689         return status;
6690 }
6691
6692 /*
6693  * Decode Read response
6694  */
6695 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696                              void *data)
6697 {
6698         struct nfs_pgio_res *res = data;
6699         struct compound_hdr hdr;
6700         int status;
6701
6702         status = decode_compound_hdr(xdr, &hdr);
6703         res->op_status = hdr.status;
6704         if (status)
6705                 goto out;
6706         status = decode_sequence(xdr, &res->seq_res, rqstp);
6707         if (status)
6708                 goto out;
6709         status = decode_putfh(xdr);
6710         if (status)
6711                 goto out;
6712         status = decode_read(xdr, rqstp, res);
6713         if (!status)
6714                 status = res->count;
6715 out:
6716         return status;
6717 }
6718
6719 /*
6720  * Decode WRITE response
6721  */
6722 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6723                               void *data)
6724 {
6725         struct nfs_pgio_res *res = data;
6726         struct compound_hdr hdr;
6727         int status;
6728
6729         status = decode_compound_hdr(xdr, &hdr);
6730         res->op_status = hdr.status;
6731         if (status)
6732                 goto out;
6733         status = decode_sequence(xdr, &res->seq_res, rqstp);
6734         if (status)
6735                 goto out;
6736         status = decode_putfh(xdr);
6737         if (status)
6738                 goto out;
6739         status = decode_write(xdr, res);
6740         if (status)
6741                 goto out;
6742         if (res->fattr)
6743                 decode_getfattr(xdr, res->fattr, res->server);
6744         if (!status)
6745                 status = res->count;
6746 out:
6747         return status;
6748 }
6749
6750 /*
6751  * Decode COMMIT response
6752  */
6753 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6754                                void *data)
6755 {
6756         struct nfs_commitres *res = data;
6757         struct compound_hdr hdr;
6758         int status;
6759
6760         status = decode_compound_hdr(xdr, &hdr);
6761         res->op_status = hdr.status;
6762         if (status)
6763                 goto out;
6764         status = decode_sequence(xdr, &res->seq_res, rqstp);
6765         if (status)
6766                 goto out;
6767         status = decode_putfh(xdr);
6768         if (status)
6769                 goto out;
6770         status = decode_commit(xdr, res);
6771 out:
6772         return status;
6773 }
6774
6775 /*
6776  * Decode FSINFO response
6777  */
6778 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6779                                void *data)
6780 {
6781         struct nfs4_fsinfo_res *res = data;
6782         struct compound_hdr hdr;
6783         int status;
6784
6785         status = decode_compound_hdr(xdr, &hdr);
6786         if (!status)
6787                 status = decode_sequence(xdr, &res->seq_res, req);
6788         if (!status)
6789                 status = decode_putfh(xdr);
6790         if (!status)
6791                 status = decode_fsinfo(xdr, res->fsinfo);
6792         return status;
6793 }
6794
6795 /*
6796  * Decode PATHCONF response
6797  */
6798 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6799                                  void *data)
6800 {
6801         struct nfs4_pathconf_res *res = data;
6802         struct compound_hdr hdr;
6803         int status;
6804
6805         status = decode_compound_hdr(xdr, &hdr);
6806         if (!status)
6807                 status = decode_sequence(xdr, &res->seq_res, req);
6808         if (!status)
6809                 status = decode_putfh(xdr);
6810         if (!status)
6811                 status = decode_pathconf(xdr, res->pathconf);
6812         return status;
6813 }
6814
6815 /*
6816  * Decode STATFS response
6817  */
6818 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6819                                void *data)
6820 {
6821         struct nfs4_statfs_res *res = data;
6822         struct compound_hdr hdr;
6823         int status;
6824
6825         status = decode_compound_hdr(xdr, &hdr);
6826         if (!status)
6827                 status = decode_sequence(xdr, &res->seq_res, req);
6828         if (!status)
6829                 status = decode_putfh(xdr);
6830         if (!status)
6831                 status = decode_statfs(xdr, res->fsstat);
6832         return status;
6833 }
6834
6835 /*
6836  * Decode GETATTR_BITMAP response
6837  */
6838 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6839                                     struct xdr_stream *xdr,
6840                                     void *data)
6841 {
6842         struct nfs4_server_caps_res *res = data;
6843         struct compound_hdr hdr;
6844         int status;
6845
6846         status = decode_compound_hdr(xdr, &hdr);
6847         if (status)
6848                 goto out;
6849         status = decode_sequence(xdr, &res->seq_res, req);
6850         if (status)
6851                 goto out;
6852         status = decode_putfh(xdr);
6853         if (status)
6854                 goto out;
6855         status = decode_server_caps(xdr, res);
6856 out:
6857         return status;
6858 }
6859
6860 /*
6861  * Decode RENEW response
6862  */
6863 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6864                               void *__unused)
6865 {
6866         struct compound_hdr hdr;
6867         int status;
6868
6869         status = decode_compound_hdr(xdr, &hdr);
6870         if (!status)
6871                 status = decode_renew(xdr);
6872         return status;
6873 }
6874
6875 /*
6876  * Decode SETCLIENTID response
6877  */
6878 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6879                                     struct xdr_stream *xdr,
6880                                     void *data)
6881 {
6882         struct nfs4_setclientid_res *res = data;
6883         struct compound_hdr hdr;
6884         int status;
6885
6886         status = decode_compound_hdr(xdr, &hdr);
6887         if (!status)
6888                 status = decode_setclientid(xdr, res);
6889         return status;
6890 }
6891
6892 /*
6893  * Decode SETCLIENTID_CONFIRM response
6894  */
6895 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6896                                             struct xdr_stream *xdr,
6897                                             void *data)
6898 {
6899         struct compound_hdr hdr;
6900         int status;
6901
6902         status = decode_compound_hdr(xdr, &hdr);
6903         if (!status)
6904                 status = decode_setclientid_confirm(xdr);
6905         return status;
6906 }
6907
6908 /*
6909  * Decode DELEGRETURN response
6910  */
6911 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6912                                     struct xdr_stream *xdr,
6913                                     void *data)
6914 {
6915         struct nfs4_delegreturnres *res = data;
6916         struct compound_hdr hdr;
6917         int status;
6918
6919         status = decode_compound_hdr(xdr, &hdr);
6920         if (status)
6921                 goto out;
6922         status = decode_sequence(xdr, &res->seq_res, rqstp);
6923         if (status)
6924                 goto out;
6925         status = decode_putfh(xdr);
6926         if (status != 0)
6927                 goto out;
6928         if (res->lr_res) {
6929                 status = decode_layoutreturn(xdr, res->lr_res);
6930                 res->lr_ret = status;
6931                 if (status)
6932                         goto out;
6933         }
6934         if (res->fattr) {
6935                 status = decode_getfattr(xdr, res->fattr, res->server);
6936                 if (status != 0)
6937                         goto out;
6938         }
6939         status = decode_delegreturn(xdr);
6940 out:
6941         return status;
6942 }
6943
6944 /*
6945  * Decode FS_LOCATIONS response
6946  */
6947 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6948                                      struct xdr_stream *xdr,
6949                                      void *data)
6950 {
6951         struct nfs4_fs_locations_res *res = data;
6952         struct compound_hdr hdr;
6953         int status;
6954
6955         status = decode_compound_hdr(xdr, &hdr);
6956         if (status)
6957                 goto out;
6958         status = decode_sequence(xdr, &res->seq_res, req);
6959         if (status)
6960                 goto out;
6961         status = decode_putfh(xdr);
6962         if (status)
6963                 goto out;
6964         if (res->migration) {
6965                 xdr_enter_page(xdr, PAGE_SIZE);
6966                 status = decode_getfattr_generic(xdr,
6967                                         &res->fs_locations->fattr,
6968                                          NULL, res->fs_locations,
6969                                          NULL, res->fs_locations->server);
6970                 if (status)
6971                         goto out;
6972                 if (res->renew)
6973                         status = decode_renew(xdr);
6974         } else {
6975                 status = decode_lookup(xdr);
6976                 if (status)
6977                         goto out;
6978                 xdr_enter_page(xdr, PAGE_SIZE);
6979                 status = decode_getfattr_generic(xdr,
6980                                         &res->fs_locations->fattr,
6981                                          NULL, res->fs_locations,
6982                                          NULL, res->fs_locations->server);
6983         }
6984 out:
6985         return status;
6986 }
6987
6988 /*
6989  * Decode SECINFO response
6990  */
6991 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6992                                 struct xdr_stream *xdr,
6993                                 void *data)
6994 {
6995         struct nfs4_secinfo_res *res = data;
6996         struct compound_hdr hdr;
6997         int status;
6998
6999         status = decode_compound_hdr(xdr, &hdr);
7000         if (status)
7001                 goto out;
7002         status = decode_sequence(xdr, &res->seq_res, rqstp);
7003         if (status)
7004                 goto out;
7005         status = decode_putfh(xdr);
7006         if (status)
7007                 goto out;
7008         status = decode_secinfo(xdr, res);
7009 out:
7010         return status;
7011 }
7012
7013 /*
7014  * Decode FSID_PRESENT response
7015  */
7016 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7017                                      struct xdr_stream *xdr,
7018                                      void *data)
7019 {
7020         struct nfs4_fsid_present_res *res = data;
7021         struct compound_hdr hdr;
7022         int status;
7023
7024         status = decode_compound_hdr(xdr, &hdr);
7025         if (status)
7026                 goto out;
7027         status = decode_sequence(xdr, &res->seq_res, rqstp);
7028         if (status)
7029                 goto out;
7030         status = decode_putfh(xdr);
7031         if (status)
7032                 goto out;
7033         status = decode_getfh(xdr, res->fh);
7034         if (status)
7035                 goto out;
7036         if (res->renew)
7037                 status = decode_renew(xdr);
7038 out:
7039         return status;
7040 }
7041
7042 #if defined(CONFIG_NFS_V4_1)
7043 /*
7044  * Decode BIND_CONN_TO_SESSION response
7045  */
7046 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7047                                         struct xdr_stream *xdr,
7048                                         void *res)
7049 {
7050         struct compound_hdr hdr;
7051         int status;
7052
7053         status = decode_compound_hdr(xdr, &hdr);
7054         if (!status)
7055                 status = decode_bind_conn_to_session(xdr, res);
7056         return status;
7057 }
7058
7059 /*
7060  * Decode EXCHANGE_ID response
7061  */
7062 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7063                                     struct xdr_stream *xdr,
7064                                     void *res)
7065 {
7066         struct compound_hdr hdr;
7067         int status;
7068
7069         status = decode_compound_hdr(xdr, &hdr);
7070         if (!status)
7071                 status = decode_exchange_id(xdr, res);
7072         return status;
7073 }
7074
7075 /*
7076  * Decode CREATE_SESSION response
7077  */
7078 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7079                                        struct xdr_stream *xdr,
7080                                        void *res)
7081 {
7082         struct compound_hdr hdr;
7083         int status;
7084
7085         status = decode_compound_hdr(xdr, &hdr);
7086         if (!status)
7087                 status = decode_create_session(xdr, res);
7088         return status;
7089 }
7090
7091 /*
7092  * Decode DESTROY_SESSION response
7093  */
7094 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7095                                         struct xdr_stream *xdr,
7096                                         void *res)
7097 {
7098         struct compound_hdr hdr;
7099         int status;
7100
7101         status = decode_compound_hdr(xdr, &hdr);
7102         if (!status)
7103                 status = decode_destroy_session(xdr, res);
7104         return status;
7105 }
7106
7107 /*
7108  * Decode DESTROY_CLIENTID response
7109  */
7110 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7111                                         struct xdr_stream *xdr,
7112                                         void *res)
7113 {
7114         struct compound_hdr hdr;
7115         int status;
7116
7117         status = decode_compound_hdr(xdr, &hdr);
7118         if (!status)
7119                 status = decode_destroy_clientid(xdr, res);
7120         return status;
7121 }
7122
7123 /*
7124  * Decode SEQUENCE response
7125  */
7126 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7127                                  struct xdr_stream *xdr,
7128                                  void *res)
7129 {
7130         struct compound_hdr hdr;
7131         int status;
7132
7133         status = decode_compound_hdr(xdr, &hdr);
7134         if (!status)
7135                 status = decode_sequence(xdr, res, rqstp);
7136         return status;
7137 }
7138
7139 #endif
7140
7141 /*
7142  * Decode GET_LEASE_TIME response
7143  */
7144 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7145                                        struct xdr_stream *xdr,
7146                                        void *data)
7147 {
7148         struct nfs4_get_lease_time_res *res = data;
7149         struct compound_hdr hdr;
7150         int status;
7151
7152         status = decode_compound_hdr(xdr, &hdr);
7153         if (!status)
7154                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7155         if (!status)
7156                 status = decode_putrootfh(xdr);
7157         if (!status)
7158                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7159         return status;
7160 }
7161
7162 #ifdef CONFIG_NFS_V4_1
7163
7164 /*
7165  * Decode RECLAIM_COMPLETE response
7166  */
7167 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7168                                          struct xdr_stream *xdr,
7169                                          void *data)
7170 {
7171         struct nfs41_reclaim_complete_res *res = data;
7172         struct compound_hdr hdr;
7173         int status;
7174
7175         status = decode_compound_hdr(xdr, &hdr);
7176         if (!status)
7177                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7178         if (!status)
7179                 status = decode_reclaim_complete(xdr, NULL);
7180         return status;
7181 }
7182
7183 /*
7184  * Decode GETDEVINFO response
7185  */
7186 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7187                                       struct xdr_stream *xdr,
7188                                       void *data)
7189 {
7190         struct nfs4_getdeviceinfo_res *res = data;
7191         struct compound_hdr hdr;
7192         int status;
7193
7194         status = decode_compound_hdr(xdr, &hdr);
7195         if (status != 0)
7196                 goto out;
7197         status = decode_sequence(xdr, &res->seq_res, rqstp);
7198         if (status != 0)
7199                 goto out;
7200         status = decode_getdeviceinfo(xdr, res);
7201 out:
7202         return status;
7203 }
7204
7205 /*
7206  * Decode LAYOUTGET response
7207  */
7208 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7209                                   struct xdr_stream *xdr,
7210                                   void *data)
7211 {
7212         struct nfs4_layoutget_res *res = data;
7213         struct compound_hdr hdr;
7214         int status;
7215
7216         status = decode_compound_hdr(xdr, &hdr);
7217         if (status)
7218                 goto out;
7219         status = decode_sequence(xdr, &res->seq_res, rqstp);
7220         if (status)
7221                 goto out;
7222         status = decode_putfh(xdr);
7223         if (status)
7224                 goto out;
7225         status = decode_layoutget(xdr, rqstp, res);
7226 out:
7227         return status;
7228 }
7229
7230 /*
7231  * Decode LAYOUTRETURN response
7232  */
7233 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7234                                      struct xdr_stream *xdr,
7235                                      void *data)
7236 {
7237         struct nfs4_layoutreturn_res *res = data;
7238         struct compound_hdr hdr;
7239         int status;
7240
7241         status = decode_compound_hdr(xdr, &hdr);
7242         if (status)
7243                 goto out;
7244         status = decode_sequence(xdr, &res->seq_res, rqstp);
7245         if (status)
7246                 goto out;
7247         status = decode_putfh(xdr);
7248         if (status)
7249                 goto out;
7250         status = decode_layoutreturn(xdr, res);
7251 out:
7252         return status;
7253 }
7254
7255 /*
7256  * Decode LAYOUTCOMMIT response
7257  */
7258 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7259                                      struct xdr_stream *xdr,
7260                                      void *data)
7261 {
7262         struct nfs4_layoutcommit_res *res = data;
7263         struct compound_hdr hdr;
7264         int status;
7265
7266         status = decode_compound_hdr(xdr, &hdr);
7267         if (status)
7268                 goto out;
7269         status = decode_sequence(xdr, &res->seq_res, rqstp);
7270         if (status)
7271                 goto out;
7272         status = decode_putfh(xdr);
7273         if (status)
7274                 goto out;
7275         status = decode_layoutcommit(xdr, rqstp, res);
7276         if (status)
7277                 goto out;
7278         decode_getfattr(xdr, res->fattr, res->server);
7279 out:
7280         return status;
7281 }
7282
7283 /*
7284  * Decode SECINFO_NO_NAME response
7285  */
7286 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7287                                         struct xdr_stream *xdr,
7288                                         void *data)
7289 {
7290         struct nfs4_secinfo_res *res = data;
7291         struct compound_hdr hdr;
7292         int status;
7293
7294         status = decode_compound_hdr(xdr, &hdr);
7295         if (status)
7296                 goto out;
7297         status = decode_sequence(xdr, &res->seq_res, rqstp);
7298         if (status)
7299                 goto out;
7300         status = decode_putrootfh(xdr);
7301         if (status)
7302                 goto out;
7303         status = decode_secinfo_no_name(xdr, res);
7304 out:
7305         return status;
7306 }
7307
7308 /*
7309  * Decode TEST_STATEID response
7310  */
7311 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7312                                      struct xdr_stream *xdr,
7313                                      void *data)
7314 {
7315         struct nfs41_test_stateid_res *res = data;
7316         struct compound_hdr hdr;
7317         int status;
7318
7319         status = decode_compound_hdr(xdr, &hdr);
7320         if (status)
7321                 goto out;
7322         status = decode_sequence(xdr, &res->seq_res, rqstp);
7323         if (status)
7324                 goto out;
7325         status = decode_test_stateid(xdr, res);
7326 out:
7327         return status;
7328 }
7329
7330 /*
7331  * Decode FREE_STATEID response
7332  */
7333 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7334                                      struct xdr_stream *xdr,
7335                                      void *data)
7336 {
7337         struct nfs41_free_stateid_res *res = data;
7338         struct compound_hdr hdr;
7339         int status;
7340
7341         status = decode_compound_hdr(xdr, &hdr);
7342         if (status)
7343                 goto out;
7344         status = decode_sequence(xdr, &res->seq_res, rqstp);
7345         if (status)
7346                 goto out;
7347         status = decode_free_stateid(xdr, res);
7348 out:
7349         return status;
7350 }
7351 #endif /* CONFIG_NFS_V4_1 */
7352
7353 /**
7354  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7355  *                      the local page cache.
7356  * @xdr: XDR stream where entry resides
7357  * @entry: buffer to fill in with entry data
7358  * @plus: boolean indicating whether this should be a readdirplus entry
7359  *
7360  * Returns zero if successful, otherwise a negative errno value is
7361  * returned.
7362  *
7363  * This function is not invoked during READDIR reply decoding, but
7364  * rather whenever an application invokes the getdents(2) system call
7365  * on a directory already in our cache.
7366  */
7367 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7368                        bool plus)
7369 {
7370         unsigned int savep;
7371         uint32_t bitmap[3] = {0};
7372         uint32_t len;
7373         uint64_t new_cookie;
7374         __be32 *p = xdr_inline_decode(xdr, 4);
7375         if (unlikely(!p))
7376                 return -EAGAIN;
7377         if (*p == xdr_zero) {
7378                 p = xdr_inline_decode(xdr, 4);
7379                 if (unlikely(!p))
7380                         return -EAGAIN;
7381                 if (*p == xdr_zero)
7382                         return -EAGAIN;
7383                 entry->eof = 1;
7384                 return -EBADCOOKIE;
7385         }
7386
7387         p = xdr_inline_decode(xdr, 12);
7388         if (unlikely(!p))
7389                 return -EAGAIN;
7390         p = xdr_decode_hyper(p, &new_cookie);
7391         entry->len = be32_to_cpup(p);
7392
7393         p = xdr_inline_decode(xdr, entry->len);
7394         if (unlikely(!p))
7395                 return -EAGAIN;
7396         entry->name = (const char *) p;
7397
7398         /*
7399          * In case the server doesn't return an inode number,
7400          * we fake one here.  (We don't use inode number 0,
7401          * since glibc seems to choke on it...)
7402          */
7403         entry->ino = 1;
7404         entry->fattr->valid = 0;
7405
7406         if (decode_attr_bitmap(xdr, bitmap) < 0)
7407                 return -EAGAIN;
7408
7409         if (decode_attr_length(xdr, &len, &savep) < 0)
7410                 return -EAGAIN;
7411
7412         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7413                         NULL, entry->label, entry->server) < 0)
7414                 return -EAGAIN;
7415         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7416                 entry->ino = entry->fattr->mounted_on_fileid;
7417         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7418                 entry->ino = entry->fattr->fileid;
7419
7420         entry->d_type = DT_UNKNOWN;
7421         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7422                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7423
7424         entry->prev_cookie = entry->cookie;
7425         entry->cookie = new_cookie;
7426
7427         return 0;
7428 }
7429
7430 /*
7431  * We need to translate between nfs status return values and
7432  * the local errno values which may not be the same.
7433  */
7434 static struct {
7435         int stat;
7436         int errno;
7437 } nfs_errtbl[] = {
7438         { NFS4_OK,              0               },
7439         { NFS4ERR_PERM,         -EPERM          },
7440         { NFS4ERR_NOENT,        -ENOENT         },
7441         { NFS4ERR_IO,           -errno_NFSERR_IO},
7442         { NFS4ERR_NXIO,         -ENXIO          },
7443         { NFS4ERR_ACCESS,       -EACCES         },
7444         { NFS4ERR_EXIST,        -EEXIST         },
7445         { NFS4ERR_XDEV,         -EXDEV          },
7446         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7447         { NFS4ERR_ISDIR,        -EISDIR         },
7448         { NFS4ERR_INVAL,        -EINVAL         },
7449         { NFS4ERR_FBIG,         -EFBIG          },
7450         { NFS4ERR_NOSPC,        -ENOSPC         },
7451         { NFS4ERR_ROFS,         -EROFS          },
7452         { NFS4ERR_MLINK,        -EMLINK         },
7453         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7454         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7455         { NFS4ERR_DQUOT,        -EDQUOT         },
7456         { NFS4ERR_STALE,        -ESTALE         },
7457         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7458         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7459         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7460         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7461         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7462         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7463         { NFS4ERR_LOCKED,       -EAGAIN         },
7464         { NFS4ERR_SYMLINK,      -ELOOP          },
7465         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7466         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7467         { -1,                   -EIO            }
7468 };
7469
7470 /*
7471  * Convert an NFS error code to a local one.
7472  * This one is used jointly by NFSv2 and NFSv3.
7473  */
7474 static int
7475 nfs4_stat_to_errno(int stat)
7476 {
7477         int i;
7478         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7479                 if (nfs_errtbl[i].stat == stat)
7480                         return nfs_errtbl[i].errno;
7481         }
7482         if (stat <= 10000 || stat > 10100) {
7483                 /* The server is looney tunes. */
7484                 return -EREMOTEIO;
7485         }
7486         /* If we cannot translate the error, the recovery routines should
7487          * handle it.
7488          * Note: remaining NFSv4 error codes have values > 10000, so should
7489          * not conflict with native Linux error codes.
7490          */
7491         return -stat;
7492 }
7493
7494 #ifdef CONFIG_NFS_V4_2
7495 #include "nfs42xdr.c"
7496 #endif /* CONFIG_NFS_V4_2 */
7497
7498 #define PROC(proc, argtype, restype)                            \
7499 [NFSPROC4_CLNT_##proc] = {                                      \
7500         .p_proc   = NFSPROC4_COMPOUND,                          \
7501         .p_encode = nfs4_xdr_##argtype,                         \
7502         .p_decode = nfs4_xdr_##restype,                         \
7503         .p_arglen = NFS4_##argtype##_sz,                        \
7504         .p_replen = NFS4_##restype##_sz,                        \
7505         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7506         .p_name   = #proc,                                      \
7507 }
7508
7509 #define STUB(proc)              \
7510 [NFSPROC4_CLNT_##proc] = {      \
7511         .p_name = #proc,        \
7512 }
7513
7514 #if defined(CONFIG_NFS_V4_1)
7515 #define PROC41(proc, argtype, restype)                          \
7516         PROC(proc, argtype, restype)
7517 #else
7518 #define PROC41(proc, argtype, restype)                          \
7519         STUB(proc)
7520 #endif
7521
7522 #if defined(CONFIG_NFS_V4_2)
7523 #define PROC42(proc, argtype, restype)                          \
7524         PROC(proc, argtype, restype)
7525 #else
7526 #define PROC42(proc, argtype, restype)                          \
7527         STUB(proc)
7528 #endif
7529
7530 const struct rpc_procinfo nfs4_procedures[] = {
7531         PROC(READ,              enc_read,               dec_read),
7532         PROC(WRITE,             enc_write,              dec_write),
7533         PROC(COMMIT,            enc_commit,             dec_commit),
7534         PROC(OPEN,              enc_open,               dec_open),
7535         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7536         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7537         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7538         PROC(CLOSE,             enc_close,              dec_close),
7539         PROC(SETATTR,           enc_setattr,            dec_setattr),
7540         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7541         PROC(RENEW,             enc_renew,              dec_renew),
7542         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7543         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7544         PROC(LOCK,              enc_lock,               dec_lock),
7545         PROC(LOCKT,             enc_lockt,              dec_lockt),
7546         PROC(LOCKU,             enc_locku,              dec_locku),
7547         PROC(ACCESS,            enc_access,             dec_access),
7548         PROC(GETATTR,           enc_getattr,            dec_getattr),
7549         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7550         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7551         PROC(REMOVE,            enc_remove,             dec_remove),
7552         PROC(RENAME,            enc_rename,             dec_rename),
7553         PROC(LINK,              enc_link,               dec_link),
7554         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7555         PROC(CREATE,            enc_create,             dec_create),
7556         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7557         PROC(STATFS,            enc_statfs,             dec_statfs),
7558         PROC(READLINK,          enc_readlink,           dec_readlink),
7559         PROC(READDIR,           enc_readdir,            dec_readdir),
7560         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7561         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7562         PROC(GETACL,            enc_getacl,             dec_getacl),
7563         PROC(SETACL,            enc_setacl,             dec_setacl),
7564         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7565         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7566         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7567         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7568         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7569         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7570         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7571         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7572         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7573         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7574         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7575         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7576         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7577         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7578         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7579         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7580         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7581         STUB(GETDEVICELIST),
7582         PROC41(BIND_CONN_TO_SESSION,
7583                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7584         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7585         PROC42(SEEK,            enc_seek,               dec_seek),
7586         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7587         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7588         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7589         PROC42(CLONE,           enc_clone,              dec_clone),
7590         PROC42(COPY,            enc_copy,               dec_copy),
7591         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7592         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7593         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7594 };
7595
7596 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7597 const struct rpc_version nfs_version4 = {
7598         .number                 = 4,
7599         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7600         .procs                  = nfs4_procedures,
7601         .counts                 = nfs_version4_counts,
7602 };
7603
7604 /*
7605  * Local variables:
7606  *  c-basic-offset: 8
7607  * End:
7608  */