fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #define encode_readdir_space 24
 109 #define encode_readdir_bitmask_sz 3
 110 #else
 111 #define nfs4_label_maxsz        0
 112 #define encode_readdir_space 20
 113 #define encode_readdir_bitmask_sz 2
 114 #endif
 115 /* We support only one layout type per file system */
 116 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 117 /* This is based on getfattr, which uses the most attributes: */
 118 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 119                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 120                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 121                                  decode_mdsthreshold_maxsz))
 122 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 123                                 nfs4_fattr_value_maxsz)
 124 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 125 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 126                                  1 + 2 + 1 + \
 127                                 nfs4_owner_maxsz + \
 128                                 nfs4_group_maxsz + \
 129                                 nfs4_label_maxsz + \
 130                                 4 + 4)
 131 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 132 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 133 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 134 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 135 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 136 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 137  * layout types will be returned.
 138  */
 139 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 140                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 141 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 142 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 143 #define encode_setclientid_maxsz \
 144                                 (op_encode_hdr_maxsz + \
 145                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 146                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 147                                 1 /* sc_prog */ + \
 148                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                 1) /* sc_cb_ident */
 151 #define decode_setclientid_maxsz \
 152                                 (op_decode_hdr_maxsz + \
 153                                 2 + \
 154                                 1024) /* large value for CLID_INUSE */
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz + \
 211                                 nfs4_label_maxsz + nfs4_fattr_maxsz)
 212 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 213 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 214 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 215                                  encode_stateid_maxsz + 4)
 216 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 217                                  2 + decode_verifier_maxsz)
 218 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 219 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 220                                  decode_verifier_maxsz)
 221 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 222                                 nfs4_name_maxsz)
 223 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 226                                 2 * nfs4_name_maxsz)
 227 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 228                                  decode_change_info_maxsz + \
 229                                  decode_change_info_maxsz)
 230 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 231                                 nfs4_name_maxsz)
 232 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 233 #define encode_lockowner_maxsz  (7)
 234 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 235                                  7 + \
 236                                  1 + encode_stateid_maxsz + 1 + \
 237                                  encode_lockowner_maxsz)
 238 #define decode_lock_denied_maxsz \
 239                                 (8 + decode_lockowner_maxsz)
 240 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 241                                  decode_lock_denied_maxsz)
 242 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 243                                 encode_lockowner_maxsz)
 244 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_lock_denied_maxsz)
 246 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 247                                  encode_stateid_maxsz + \
 248                                  4)
 249 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 250                                  decode_stateid_maxsz)
 251 #define encode_release_lockowner_maxsz \
 252                                 (op_encode_hdr_maxsz + \
 253                                  encode_lockowner_maxsz)
 254 #define decode_release_lockowner_maxsz \
 255                                 (op_decode_hdr_maxsz)
 256 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 257 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 258 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 259                                 1 + nfs4_name_maxsz + \
 260                                 1 + \
 261                                 nfs4_fattr_maxsz)
 262 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 263 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 264                                 1 + 2 + nfs4_name_maxsz + \
 265                                 encode_attrs_maxsz)
 266 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 267                                 decode_change_info_maxsz + \
 268                                 nfs4_fattr_bitmap_maxsz)
 269 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 270 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 271 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 272 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 273 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 274 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 275                                  nfs4_fattr_bitmap_maxsz + 1)
 276 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 277                                  encode_stateid_maxsz + 3)
 278 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 279 #define encode_fs_locations_maxsz \
 280                                 (encode_getattr_maxsz)
 281 #define decode_fs_locations_maxsz \
 282                                 (0)
 283 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 284 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 285
 286 #if defined(CONFIG_NFS_V4_1)
 287 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 288 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 289                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 290
 291 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 292                                 encode_verifier_maxsz + \
 293                                 1 /* co_ownerid.len */ + \
 294                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 /* max is SP4_MACH_CRED (for now) */ + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 300                                 1 /* implementation id array of size 1 */ + \
 301                                 1 /* nii_domain */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 1 /* nii_name */ + \
 304                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 305                                 3 /* nii_date */)
 306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 307                                 2 /* eir_clientid */ + \
 308                                 1 /* eir_sequenceid */ + \
 309                                 1 /* eir_flags */ + \
 310                                 1 /* spr_how */ + \
 311                                   /* max is SP4_MACH_CRED (for now) */ + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                 2 /* eir_server_owner.so_minor_id */ + \
 315                                 /* eir_server_owner.so_major_id<> */ \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 317                                 /* eir_server_scope<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 1 /* eir_server_impl_id array length */ + \
 320                                 1 /* nii_domain */ + \
 321                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 322                                 1 /* nii_name */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 3 /* nii_date */)
 325 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 326 #define decode_channel_attrs_maxsz  (6 + \
 327                                      1 /* ca_rdma_ird.len */ + \
 328                                      1 /* ca_rdma_ird */)
 329 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      2 /* csa_clientid */ + \
 331                                      1 /* csa_sequence */ + \
 332                                      1 /* csa_flags */ + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      encode_channel_attrs_maxsz + \
 335                                      1 /* csa_cb_program */ + \
 336                                      1 /* csa_sec_parms.len (1) */ + \
 337                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 338                                      1 /* stamp */ + \
 339                                      1 /* machinename.len */ + \
 340                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 341                                      1 /* uid */ + \
 342                                      1 /* gid */ + \
 343                                      1 /* gids.len (0) */)
 344 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 345                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 346                                      1 /* csr_sequence */ + \
 347                                      1 /* csr_flags */ + \
 348                                      decode_channel_attrs_maxsz + \
 349                                      decode_channel_attrs_maxsz)
 350 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 351                                      /* bctsa_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsa_dir */ + \
 354                                      1 /* bctsa_use_conn_in_rdma_mode */)
 355 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 356                                      /* bctsr_sessid */ \
 357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                      1 /* bctsr_dir */ + \
 359                                      1 /* bctsr_use_conn_in_rdma_mode */)
 360 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 361 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 362 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 363 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 364 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 365                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 366 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 368 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 369 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 370 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 371                                 encode_verifier_maxsz)
 372 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 373                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 374                                 decode_verifier_maxsz \
 375                                   /* verifier4 gdlr_verifier */ + \
 376                                 1 /* gdlr_deviceid_list count */ + \
 377                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 378                                             NFS4_DEVICEID4_SIZE) \
 379                                   /* gdlr_deviceid_list */ + \
 380                                 1 /* bool gdlr_eof */)
 381 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 382                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 383 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 384                                 1 /* layout type */ + \
 385                                 1 /* opaque devaddr4 length */ + \
 386                                   /* devaddr4 payload is read into page */ \
 387                                 1 /* notification bitmap length */ + \
 388                                 1 /* notification bitmap */)
 389 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 390                                 encode_stateid_maxsz)
 391 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 392                                 decode_stateid_maxsz + \
 393                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 394 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 395                                 2 /* offset */ + \
 396                                 2 /* length */ + \
 397                                 1 /* reclaim */ + \
 398                                 encode_stateid_maxsz + \
 399                                 1 /* new offset (true) */ + \
 400                                 2 /* last byte written */ + \
 401                                 1 /* nt_timechanged (false) */ + \
 402                                 1 /* layoutupdate4 layout type */ + \
 403                                 1 /* NULL filelayout layoutupdate4 payload */)
 404 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 405 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 406                                 encode_stateid_maxsz + \
 407                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 408 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 409                                 1 + decode_stateid_maxsz)
 410 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 411 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 412 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 413                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 414 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 415 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 416                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 417 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 418 #else /* CONFIG_NFS_V4_1 */
 419 #define encode_sequence_maxsz   0
 420 #define decode_sequence_maxsz   0
 421 #endif /* CONFIG_NFS_V4_1 */
 422
 423 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 424 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 425 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_read_maxsz)
 429 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_read_maxsz)
 433 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_readlink_maxsz)
 437 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_readlink_maxsz)
 441 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_readdir_maxsz)
 445 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_readdir_maxsz)
 449 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_write_maxsz + \
 453                                 encode_getattr_maxsz)
 454 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 455                                 decode_sequence_maxsz + \
 456                                 decode_putfh_maxsz + \
 457                                 decode_write_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_commit_maxsz)
 463 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 464                                 decode_sequence_maxsz + \
 465                                 decode_putfh_maxsz + \
 466                                 decode_commit_maxsz)
 467 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_open_maxsz + \
 471                                 encode_access_maxsz + \
 472                                 encode_getfh_maxsz + \
 473                                 encode_getattr_maxsz)
 474 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 475                                 decode_sequence_maxsz + \
 476                                 decode_putfh_maxsz + \
 477                                 decode_open_maxsz + \
 478                                 decode_access_maxsz + \
 479                                 decode_getfh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_open_confirm_sz \
 482                                 (compound_encode_hdr_maxsz + \
 483                                  encode_putfh_maxsz + \
 484                                  encode_open_confirm_maxsz)
 485 #define NFS4_dec_open_confirm_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_putfh_maxsz + \
 488                                  decode_open_confirm_maxsz)
 489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 490                                         encode_sequence_maxsz + \
 491                                         encode_putfh_maxsz + \
 492                                         encode_open_maxsz + \
 493                                         encode_access_maxsz + \
 494                                         encode_getattr_maxsz)
 495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 496                                         decode_sequence_maxsz + \
 497                                         decode_putfh_maxsz + \
 498                                         decode_open_maxsz + \
 499                                         decode_access_maxsz + \
 500                                         decode_getattr_maxsz)
 501 #define NFS4_enc_open_downgrade_sz \
 502                                 (compound_encode_hdr_maxsz + \
 503                                  encode_sequence_maxsz + \
 504                                  encode_putfh_maxsz + \
 505                                  encode_open_downgrade_maxsz + \
 506                                  encode_getattr_maxsz)
 507 #define NFS4_dec_open_downgrade_sz \
 508                                 (compound_decode_hdr_maxsz + \
 509                                  decode_sequence_maxsz + \
 510                                  decode_putfh_maxsz + \
 511                                  decode_open_downgrade_maxsz + \
 512                                  decode_getattr_maxsz)
 513 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 514                                  encode_sequence_maxsz + \
 515                                  encode_putfh_maxsz + \
 516                                  encode_close_maxsz + \
 517                                  encode_getattr_maxsz)
 518 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 519                                  decode_sequence_maxsz + \
 520                                  decode_putfh_maxsz + \
 521                                  decode_close_maxsz + \
 522                                  decode_getattr_maxsz)
 523 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 524                                  encode_sequence_maxsz + \
 525                                  encode_putfh_maxsz + \
 526                                  encode_setattr_maxsz + \
 527                                  encode_getattr_maxsz)
 528 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_setattr_maxsz + \
 532                                  decode_getattr_maxsz)
 533 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 534                                 encode_sequence_maxsz + \
 535                                 encode_putfh_maxsz + \
 536                                 encode_fsinfo_maxsz)
 537 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 538                                 decode_sequence_maxsz + \
 539                                 decode_putfh_maxsz + \
 540                                 decode_fsinfo_maxsz)
 541 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 542                                 encode_renew_maxsz)
 543 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 544                                 decode_renew_maxsz)
 545 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 546                                 encode_setclientid_maxsz)
 547 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 548                                 decode_setclientid_maxsz)
 549 #define NFS4_enc_setclientid_confirm_sz \
 550                                 (compound_encode_hdr_maxsz + \
 551                                 encode_setclientid_confirm_maxsz)
 552 #define NFS4_dec_setclientid_confirm_sz \
 553                                 (compound_decode_hdr_maxsz + \
 554                                 decode_setclientid_confirm_maxsz)
 555 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_lock_maxsz)
 559 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_lock_maxsz)
 563 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_sequence_maxsz + \
 565                                 encode_putfh_maxsz + \
 566                                 encode_lockt_maxsz)
 567 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 568                                  decode_sequence_maxsz + \
 569                                  decode_putfh_maxsz + \
 570                                  decode_lockt_maxsz)
 571 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_locku_maxsz)
 575 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 576                                 decode_sequence_maxsz + \
 577                                 decode_putfh_maxsz + \
 578                                 decode_locku_maxsz)
 579 #define NFS4_enc_release_lockowner_sz \
 580                                 (compound_encode_hdr_maxsz + \
 581                                  encode_lockowner_maxsz)
 582 #define NFS4_dec_release_lockowner_sz \
 583                                 (compound_decode_hdr_maxsz + \
 584                                  decode_lockowner_maxsz)
 585 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_access_maxsz + \
 589                                 encode_getattr_maxsz)
 590 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 591                                 decode_sequence_maxsz + \
 592                                 decode_putfh_maxsz + \
 593                                 decode_access_maxsz + \
 594                                 decode_getattr_maxsz)
 595 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 596                                 encode_sequence_maxsz + \
 597                                 encode_putfh_maxsz + \
 598                                 encode_getattr_maxsz)
 599 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 600                                 decode_sequence_maxsz + \
 601                                 decode_putfh_maxsz + \
 602                                 decode_getattr_maxsz)
 603 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 604                                 encode_sequence_maxsz + \
 605                                 encode_putfh_maxsz + \
 606                                 encode_lookup_maxsz + \
 607                                 encode_getattr_maxsz + \
 608                                 encode_getfh_maxsz)
 609 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_lookup_maxsz + \
 613                                 decode_getattr_maxsz + \
 614                                 decode_getfh_maxsz)
 615 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putrootfh_maxsz + \
 618                                 encode_getattr_maxsz + \
 619                                 encode_getfh_maxsz)
 620 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 621                                 decode_sequence_maxsz + \
 622                                 decode_putrootfh_maxsz + \
 623                                 decode_getattr_maxsz + \
 624                                 decode_getfh_maxsz)
 625 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 626                                 encode_sequence_maxsz + \
 627                                 encode_putfh_maxsz + \
 628                                 encode_remove_maxsz)
 629 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 630                                 decode_sequence_maxsz + \
 631                                 decode_putfh_maxsz + \
 632                                 decode_remove_maxsz)
 633 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 634                                 encode_sequence_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_savefh_maxsz + \
 637                                 encode_putfh_maxsz + \
 638                                 encode_rename_maxsz)
 639 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 640                                 decode_sequence_maxsz + \
 641                                 decode_putfh_maxsz + \
 642                                 decode_savefh_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_rename_maxsz)
 645 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_savefh_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_link_maxsz + \
 651                                 encode_restorefh_maxsz + \
 652                                 encode_getattr_maxsz)
 653 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_savefh_maxsz + \
 657                                 decode_putfh_maxsz + \
 658                                 decode_link_maxsz + \
 659                                 decode_restorefh_maxsz + \
 660                                 decode_getattr_maxsz)
 661 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_symlink_maxsz + \
 665                                 encode_getattr_maxsz + \
 666                                 encode_getfh_maxsz)
 667 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 668                                 decode_sequence_maxsz + \
 669                                 decode_putfh_maxsz + \
 670                                 decode_symlink_maxsz + \
 671                                 decode_getattr_maxsz + \
 672                                 decode_getfh_maxsz)
 673 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 674                                 encode_sequence_maxsz + \
 675                                 encode_putfh_maxsz + \
 676                                 encode_create_maxsz + \
 677                                 encode_getfh_maxsz + \
 678                                 encode_getattr_maxsz)
 679 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 680                                 decode_sequence_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_create_maxsz + \
 683                                 decode_getfh_maxsz + \
 684                                 decode_getattr_maxsz)
 685 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 686                                 encode_sequence_maxsz + \
 687                                 encode_putfh_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_getattr_maxsz)
 693 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_statfs_maxsz)
 697 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_putfh_maxsz + \
 700                                 decode_statfs_maxsz)
 701 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_getattr_maxsz)
 705 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_getattr_maxsz)
 709 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_delegreturn_maxsz + \
 713                                 encode_getattr_maxsz)
 714 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 715                                 decode_sequence_maxsz + \
 716                                 decode_delegreturn_maxsz + \
 717                                 decode_getattr_maxsz)
 718 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 719                                 encode_sequence_maxsz + \
 720                                 encode_putfh_maxsz + \
 721                                 encode_getacl_maxsz)
 722 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 723                                 decode_sequence_maxsz + \
 724                                 decode_putfh_maxsz + \
 725                                 decode_getacl_maxsz)
 726 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 727                                 encode_sequence_maxsz + \
 728                                 encode_putfh_maxsz + \
 729                                 encode_setacl_maxsz)
 730 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 731                                 decode_sequence_maxsz + \
 732                                 decode_putfh_maxsz + \
 733                                 decode_setacl_maxsz)
 734 #define NFS4_enc_fs_locations_sz \
 735                                 (compound_encode_hdr_maxsz + \
 736                                  encode_sequence_maxsz + \
 737                                  encode_putfh_maxsz + \
 738                                  encode_lookup_maxsz + \
 739                                  encode_fs_locations_maxsz)
 740 #define NFS4_dec_fs_locations_sz \
 741                                 (compound_decode_hdr_maxsz + \
 742                                  decode_sequence_maxsz + \
 743                                  decode_putfh_maxsz + \
 744                                  decode_lookup_maxsz + \
 745                                  decode_fs_locations_maxsz)
 746 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 747                                 encode_sequence_maxsz + \
 748                                 encode_putfh_maxsz + \
 749                                 encode_secinfo_maxsz)
 750 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 751                                 decode_sequence_maxsz + \
 752                                 decode_putfh_maxsz + \
 753                                 decode_secinfo_maxsz)
 754 #if defined(CONFIG_NFS_V4_1)
 755 #define NFS4_enc_bind_conn_to_session_sz \
 756                                 (compound_encode_hdr_maxsz + \
 757                                  encode_bind_conn_to_session_maxsz)
 758 #define NFS4_dec_bind_conn_to_session_sz \
 759                                 (compound_decode_hdr_maxsz + \
 760                                  decode_bind_conn_to_session_maxsz)
 761 #define NFS4_enc_exchange_id_sz \
 762                                 (compound_encode_hdr_maxsz + \
 763                                  encode_exchange_id_maxsz)
 764 #define NFS4_dec_exchange_id_sz \
 765                                 (compound_decode_hdr_maxsz + \
 766                                  decode_exchange_id_maxsz)
 767 #define NFS4_enc_create_session_sz \
 768                                 (compound_encode_hdr_maxsz + \
 769                                  encode_create_session_maxsz)
 770 #define NFS4_dec_create_session_sz \
 771                                 (compound_decode_hdr_maxsz + \
 772                                  decode_create_session_maxsz)
 773 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 774                                          encode_destroy_session_maxsz)
 775 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 776                                          decode_destroy_session_maxsz)
 777 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 778                                          encode_destroy_clientid_maxsz)
 779 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 780                                          decode_destroy_clientid_maxsz)
 781 #define NFS4_enc_sequence_sz \
 782                                 (compound_decode_hdr_maxsz + \
 783                                  encode_sequence_maxsz)
 784 #define NFS4_dec_sequence_sz \
 785                                 (compound_decode_hdr_maxsz + \
 786                                  decode_sequence_maxsz)
 787 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 788                                          encode_sequence_maxsz + \
 789                                          encode_putrootfh_maxsz + \
 790                                          encode_fsinfo_maxsz)
 791 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 792                                          decode_sequence_maxsz + \
 793                                          decode_putrootfh_maxsz + \
 794                                          decode_fsinfo_maxsz)
 795 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 796                                          encode_sequence_maxsz + \
 797                                          encode_reclaim_complete_maxsz)
 798 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 799                                          decode_sequence_maxsz + \
 800                                          decode_reclaim_complete_maxsz)
 801 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 802                                 encode_sequence_maxsz + \
 803                                 encode_putfh_maxsz + \
 804                                 encode_getdevicelist_maxsz)
 805 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 806                                 decode_sequence_maxsz + \
 807                                 decode_putfh_maxsz + \
 808                                 decode_getdevicelist_maxsz)
 809 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 810                                 encode_sequence_maxsz +\
 811                                 encode_getdeviceinfo_maxsz)
 812 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 813                                 decode_sequence_maxsz + \
 814                                 decode_getdeviceinfo_maxsz)
 815 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 816                                 encode_sequence_maxsz + \
 817                                 encode_putfh_maxsz +        \
 818                                 encode_layoutget_maxsz)
 819 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 820                                 decode_sequence_maxsz + \
 821                                 decode_putfh_maxsz +        \
 822                                 decode_layoutget_maxsz)
 823 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 824                                 encode_sequence_maxsz +\
 825                                 encode_putfh_maxsz + \
 826                                 encode_layoutcommit_maxsz + \
 827                                 encode_getattr_maxsz)
 828 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 829                                 decode_sequence_maxsz + \
 830                                 decode_putfh_maxsz + \
 831                                 decode_layoutcommit_maxsz + \
 832                                 decode_getattr_maxsz)
 833 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 834                                 encode_sequence_maxsz + \
 835                                 encode_putfh_maxsz + \
 836                                 encode_layoutreturn_maxsz)
 837 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 838                                 decode_sequence_maxsz + \
 839                                 decode_putfh_maxsz + \
 840                                 decode_layoutreturn_maxsz)
 841 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 842                                         encode_sequence_maxsz + \
 843                                         encode_putrootfh_maxsz +\
 844                                         encode_secinfo_no_name_maxsz)
 845 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 846                                         decode_sequence_maxsz + \
 847                                         decode_putrootfh_maxsz + \
 848                                         decode_secinfo_no_name_maxsz)
 849 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 850                                          encode_sequence_maxsz + \
 851                                          encode_test_stateid_maxsz)
 852 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 853                                          decode_sequence_maxsz + \
 854                                          decode_test_stateid_maxsz)
 855 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 856                                          encode_sequence_maxsz + \
 857                                          encode_free_stateid_maxsz)
 858 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 859                                          decode_sequence_maxsz + \
 860                                          decode_free_stateid_maxsz)
 861
 862 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 863                                       compound_encode_hdr_maxsz +
 864                                       encode_sequence_maxsz +
 865                                       encode_putfh_maxsz +
 866                                       encode_getattr_maxsz) *
 867                                      XDR_UNIT);
 868
 869 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 870                                      compound_decode_hdr_maxsz +
 871                                      decode_sequence_maxsz +
 872                                      decode_putfh_maxsz) *
 873                                     XDR_UNIT);
 874
 875 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 876                                            compound_decode_hdr_maxsz +
 877                                            decode_sequence_maxsz) *
 878                                           XDR_UNIT);
 879 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 880 #endif /* CONFIG_NFS_V4_1 */
 881
 882 static const umode_t nfs_type2fmt[] = {
 883         [NF4BAD] = 0,
 884         [NF4REG] = S_IFREG,
 885         [NF4DIR] = S_IFDIR,
 886         [NF4BLK] = S_IFBLK,
 887         [NF4CHR] = S_IFCHR,
 888         [NF4LNK] = S_IFLNK,
 889         [NF4SOCK] = S_IFSOCK,
 890         [NF4FIFO] = S_IFIFO,
 891         [NF4ATTRDIR] = 0,
 892         [NF4NAMEDATTR] = 0,
 893 };
 894
 895 struct compound_hdr {
 896         int32_t         status;
 897         uint32_t        nops;
 898         __be32 *        nops_p;
 899         uint32_t        taglen;
 900         char *          tag;
 901         uint32_t        replen;         /* expected reply words */
 902         u32             minorversion;
 903 };
 904
 905 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 906 {
 907         __be32 *p = xdr_reserve_space(xdr, nbytes);
 908         BUG_ON(!p);
 909         return p;
 910 }
 911
 912 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 913 {
 914         __be32 *p;
 915
 916         p = xdr_reserve_space(xdr, len);
 917         xdr_encode_opaque_fixed(p, buf, len);
 918 }
 919
 920 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 921 {
 922         __be32 *p;
 923
 924         p = reserve_space(xdr, 4 + len);
 925         xdr_encode_opaque(p, str, len);
 926 }
 927
 928 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 929 {
 930         __be32 *p;
 931
 932         p = reserve_space(xdr, 4);
 933         *p = cpu_to_be32(n);
 934 }
 935
 936 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 937 {
 938         __be32 *p;
 939
 940         p = reserve_space(xdr, 8);
 941         xdr_encode_hyper(p, n);
 942 }
 943
 944 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 945                 const struct nfs_seqid *seqid)
 946 {
 947         encode_uint32(xdr, seqid->sequence->counter);
 948 }
 949
 950 static void encode_compound_hdr(struct xdr_stream *xdr,
 951                                 struct rpc_rqst *req,
 952                                 struct compound_hdr *hdr)
 953 {
 954         __be32 *p;
 955         struct rpc_auth *auth = req->rq_cred->cr_auth;
 956
 957         /* initialize running count of expected bytes in reply.
 958          * NOTE: the replied tag SHOULD be the same is the one sent,
 959          * but this is not required as a MUST for the server to do so. */
 960         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 961
 962         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 963         encode_string(xdr, hdr->taglen, hdr->tag);
 964         p = reserve_space(xdr, 8);
 965         *p++ = cpu_to_be32(hdr->minorversion);
 966         hdr->nops_p = p;
 967         *p = cpu_to_be32(hdr->nops);
 968 }
 969
 970 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 971                 uint32_t replen,
 972                 struct compound_hdr *hdr)
 973 {
 974         encode_uint32(xdr, op);
 975         hdr->nops++;
 976         hdr->replen += replen;
 977 }
 978
 979 static void encode_nops(struct compound_hdr *hdr)
 980 {
 981         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 982         *hdr->nops_p = htonl(hdr->nops);
 983 }
 984
 985 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 986 {
 987         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 988 }
 989
 990 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 991 {
 992         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 993 }
 994
 995 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 996                                 const struct nfs4_label *label,
 997                                 const struct nfs_server *server)
 998 {
 999         char owner_name[IDMAP_NAMESZ];
1000         char owner_group[IDMAP_NAMESZ];
1001         int owner_namelen = 0;
1002         int owner_grouplen = 0;
1003         __be32 *p;
1004         unsigned i;
1005         uint32_t len = 0;
1006         uint32_t bmval_len;
1007         uint32_t bmval[3] = { 0 };
1008
1009         /*
1010          * We reserve enough space to write the entire attribute buffer at once.
1011          * In the worst-case, this would be
1012          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1013          * = 40 bytes, plus any contribution from variable-length fields
1014          *            such as owner/group.
1015          */
1016         if (iap->ia_valid & ATTR_SIZE) {
1017                 bmval[0] |= FATTR4_WORD0_SIZE;
1018                 len += 8;
1019         }
1020         if (iap->ia_valid & ATTR_MODE) {
1021                 bmval[1] |= FATTR4_WORD1_MODE;
1022                 len += 4;
1023         }
1024         if (iap->ia_valid & ATTR_UID) {
1025                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1026                 if (owner_namelen < 0) {
1027                         dprintk("nfs: couldn't resolve uid %d to string\n",
1028                                         from_kuid(&init_user_ns, iap->ia_uid));
1029                         /* XXX */
1030                         strcpy(owner_name, "nobody");
1031                         owner_namelen = sizeof("nobody") - 1;
1032                         /* goto out; */
1033                 }
1034                 bmval[1] |= FATTR4_WORD1_OWNER;
1035                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1036         }
1037         if (iap->ia_valid & ATTR_GID) {
1038                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1039                 if (owner_grouplen < 0) {
1040                         dprintk("nfs: couldn't resolve gid %d to string\n",
1041                                         from_kgid(&init_user_ns, iap->ia_gid));
1042                         strcpy(owner_group, "nobody");
1043                         owner_grouplen = sizeof("nobody") - 1;
1044                         /* goto out; */
1045                 }
1046                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1047                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1048         }
1049         if (iap->ia_valid & ATTR_ATIME_SET) {
1050                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1051                 len += 16;
1052         } else if (iap->ia_valid & ATTR_ATIME) {
1053                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1054                 len += 4;
1055         }
1056         if (iap->ia_valid & ATTR_MTIME_SET) {
1057                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1058                 len += 16;
1059         } else if (iap->ia_valid & ATTR_MTIME) {
1060                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1061                 len += 4;
1062         }
1063         if (label) {
1064                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066         }
1067
1068         if (bmval[2] != 0)
1069                 bmval_len = 3;
1070         else if (bmval[1] != 0)
1071                 bmval_len = 2;
1072         else
1073                 bmval_len = 1;
1074
1075         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1076
1077         *p++ = cpu_to_be32(bmval_len);
1078         for (i = 0; i < bmval_len; i++)
1079                 *p++ = cpu_to_be32(bmval[i]);
1080         *p++ = cpu_to_be32(len);
1081
1082         if (bmval[0] & FATTR4_WORD0_SIZE)
1083                 p = xdr_encode_hyper(p, iap->ia_size);
1084         if (bmval[1] & FATTR4_WORD1_MODE)
1085                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086         if (bmval[1] & FATTR4_WORD1_OWNER)
1087                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1091                 if (iap->ia_valid & ATTR_ATIME_SET) {
1092                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1093                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1094                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1095                 } else
1096                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1097         }
1098         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1099                 if (iap->ia_valid & ATTR_MTIME_SET) {
1100                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1101                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1102                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1103                 } else
1104                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1105         }
1106         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107                 *p++ = cpu_to_be32(label->lfs);
1108                 *p++ = cpu_to_be32(label->pi);
1109                 *p++ = cpu_to_be32(label->len);
1110                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111         }
1112
1113 /* out: */
1114 }
1115
1116 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1117 {
1118         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1119         encode_uint32(xdr, access);
1120 }
1121
1122 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1123 {
1124         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125         encode_nfs4_seqid(xdr, arg->seqid);
1126         encode_nfs4_stateid(xdr, arg->stateid);
1127 }
1128
1129 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1130 {
1131         __be32 *p;
1132
1133         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1134         p = reserve_space(xdr, 12);
1135         p = xdr_encode_hyper(p, args->offset);
1136         *p = cpu_to_be32(args->count);
1137 }
1138
1139 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1140 {
1141         __be32 *p;
1142
1143         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1144         encode_uint32(xdr, create->ftype);
1145
1146         switch (create->ftype) {
1147         case NF4LNK:
1148                 p = reserve_space(xdr, 4);
1149                 *p = cpu_to_be32(create->u.symlink.len);
1150                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1151                 break;
1152
1153         case NF4BLK: case NF4CHR:
1154                 p = reserve_space(xdr, 8);
1155                 *p++ = cpu_to_be32(create->u.device.specdata1);
1156                 *p = cpu_to_be32(create->u.device.specdata2);
1157                 break;
1158
1159         default:
1160                 break;
1161         }
1162
1163         encode_string(xdr, create->name->len, create->name->name);
1164         encode_attrs(xdr, create->attrs, create->label, create->server);
1165 }
1166
1167 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1168 {
1169         __be32 *p;
1170
1171         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1172         p = reserve_space(xdr, 8);
1173         *p++ = cpu_to_be32(1);
1174         *p = cpu_to_be32(bitmap);
1175 }
1176
1177 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1178 {
1179         __be32 *p;
1180
1181         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1182         p = reserve_space(xdr, 12);
1183         *p++ = cpu_to_be32(2);
1184         *p++ = cpu_to_be32(bm0);
1185         *p = cpu_to_be32(bm1);
1186 }
1187
1188 static void
1189 encode_getattr_three(struct xdr_stream *xdr,
1190                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1191                      struct compound_hdr *hdr)
1192 {
1193         __be32 *p;
1194
1195         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196         if (bm2) {
1197                 p = reserve_space(xdr, 16);
1198                 *p++ = cpu_to_be32(3);
1199                 *p++ = cpu_to_be32(bm0);
1200                 *p++ = cpu_to_be32(bm1);
1201                 *p = cpu_to_be32(bm2);
1202         } else if (bm1) {
1203                 p = reserve_space(xdr, 12);
1204                 *p++ = cpu_to_be32(2);
1205                 *p++ = cpu_to_be32(bm0);
1206                 *p = cpu_to_be32(bm1);
1207         } else {
1208                 p = reserve_space(xdr, 8);
1209                 *p++ = cpu_to_be32(1);
1210                 *p = cpu_to_be32(bm0);
1211         }
1212 }
1213
1214 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215 {
1216         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1217                            bitmask[1] & nfs4_fattr_bitmap[1],
1218                            bitmask[2] & nfs4_fattr_bitmap[2],
1219                            hdr);
1220 }
1221
1222 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223                                  const u32 *open_bitmap,
1224                                  struct compound_hdr *hdr)
1225 {
1226         encode_getattr_three(xdr,
1227                              bitmask[0] & open_bitmap[0],
1228                              bitmask[1] & open_bitmap[1],
1229                              bitmask[2] & open_bitmap[2],
1230                              hdr);
1231 }
1232
1233 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1234 {
1235         encode_getattr_three(xdr,
1236                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1237                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1238                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1239                              hdr);
1240 }
1241
1242 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243 {
1244         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1245                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246 }
1247
1248 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1249 {
1250         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1251 }
1252
1253 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1254 {
1255         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256         encode_string(xdr, name->len, name->name);
1257 }
1258
1259 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1260 {
1261         if (fl->fl_type == F_RDLCK)
1262                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1263         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1264 }
1265
1266 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1267 {
1268         if (fl->fl_end == OFFSET_MAX)
1269                 return ~(uint64_t)0;
1270         return fl->fl_end - fl->fl_start + 1;
1271 }
1272
1273 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1274 {
1275         __be32 *p;
1276
1277         p = reserve_space(xdr, 32);
1278         p = xdr_encode_hyper(p, lowner->clientid);
1279         *p++ = cpu_to_be32(20);
1280         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281         *p++ = cpu_to_be32(lowner->s_dev);
1282         xdr_encode_hyper(p, lowner->id);
1283 }
1284
1285 /*
1286  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1287  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1288  */
1289 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1294         p = reserve_space(xdr, 28);
1295         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1296         *p++ = cpu_to_be32(args->reclaim);
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299         *p = cpu_to_be32(args->new_lock_owner);
1300         if (args->new_lock_owner){
1301                 encode_nfs4_seqid(xdr, args->open_seqid);
1302                 encode_nfs4_stateid(xdr, args->open_stateid);
1303                 encode_nfs4_seqid(xdr, args->lock_seqid);
1304                 encode_lockowner(xdr, &args->lock_owner);
1305         }
1306         else {
1307                 encode_nfs4_stateid(xdr, args->lock_stateid);
1308                 encode_nfs4_seqid(xdr, args->lock_seqid);
1309         }
1310 }
1311
1312 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1313 {
1314         __be32 *p;
1315
1316         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1317         p = reserve_space(xdr, 20);
1318         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         encode_lockowner(xdr, &args->lock_owner);
1322 }
1323
1324 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1325 {
1326         __be32 *p;
1327
1328         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1329         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330         encode_nfs4_seqid(xdr, args->seqid);
1331         encode_nfs4_stateid(xdr, args->stateid);
1332         p = reserve_space(xdr, 16);
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 }
1336
1337 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1338 {
1339         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340         encode_lockowner(xdr, lowner);
1341 }
1342
1343 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1344 {
1345         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346         encode_string(xdr, name->len, name->name);
1347 }
1348
1349 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1350 {
1351         __be32 *p;
1352
1353         p = reserve_space(xdr, 8);
1354         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1355         case FMODE_READ:
1356                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1357                 break;
1358         case FMODE_WRITE:
1359                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1360                 break;
1361         case FMODE_READ|FMODE_WRITE:
1362                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1363                 break;
1364         default:
1365                 *p++ = cpu_to_be32(0);
1366         }
1367         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1368 }
1369
1370 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1371 {
1372         __be32 *p;
1373  /*
1374  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1375  * owner 4 = 32
1376  */
1377         encode_nfs4_seqid(xdr, arg->seqid);
1378         encode_share_access(xdr, arg->fmode);
1379         p = reserve_space(xdr, 36);
1380         p = xdr_encode_hyper(p, arg->clientid);
1381         *p++ = cpu_to_be32(24);
1382         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383         *p++ = cpu_to_be32(arg->server->s_dev);
1384         *p++ = cpu_to_be32(arg->id.uniquifier);
1385         xdr_encode_hyper(p, arg->id.create_time);
1386 }
1387
1388 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390         struct iattr dummy;
1391         __be32 *p;
1392
1393         p = reserve_space(xdr, 4);
1394         switch(arg->createmode) {
1395         case NFS4_CREATE_UNCHECKED:
1396                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1398                 break;
1399         case NFS4_CREATE_GUARDED:
1400                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402                 break;
1403         case NFS4_CREATE_EXCLUSIVE:
1404                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1405                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1406                 break;
1407         case NFS4_CREATE_EXCLUSIVE4_1:
1408                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1409                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1410                 dummy.ia_valid = 0;
1411                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1412         }
1413 }
1414
1415 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1416 {
1417         __be32 *p;
1418
1419         p = reserve_space(xdr, 4);
1420         switch (arg->open_flags & O_CREAT) {
1421         case 0:
1422                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1423                 break;
1424         default:
1425                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1426                 encode_createmode(xdr, arg);
1427         }
1428 }
1429
1430 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         switch (delegation_type) {
1436         case 0:
1437                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1438                 break;
1439         case FMODE_READ:
1440                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1441                 break;
1442         case FMODE_WRITE|FMODE_READ:
1443                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1444                 break;
1445         default:
1446                 BUG();
1447         }
1448 }
1449
1450 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1451 {
1452         __be32 *p;
1453
1454         p = reserve_space(xdr, 4);
1455         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1456         encode_string(xdr, name->len, name->name);
1457 }
1458
1459 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1465         encode_delegation_type(xdr, type);
1466 }
1467
1468 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1469 {
1470         __be32 *p;
1471
1472         p = reserve_space(xdr, 4);
1473         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1474         encode_nfs4_stateid(xdr, stateid);
1475         encode_string(xdr, name->len, name->name);
1476 }
1477
1478 static inline void encode_claim_fh(struct xdr_stream *xdr)
1479 {
1480         __be32 *p;
1481
1482         p = reserve_space(xdr, 4);
1483         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1484 }
1485
1486 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1492         encode_nfs4_stateid(xdr, stateid);
1493 }
1494
1495 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1496 {
1497         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1498         encode_openhdr(xdr, arg);
1499         encode_opentype(xdr, arg);
1500         switch (arg->claim) {
1501         case NFS4_OPEN_CLAIM_NULL:
1502                 encode_claim_null(xdr, arg->name);
1503                 break;
1504         case NFS4_OPEN_CLAIM_PREVIOUS:
1505                 encode_claim_previous(xdr, arg->u.delegation_type);
1506                 break;
1507         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1508                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1509                 break;
1510         case NFS4_OPEN_CLAIM_FH:
1511                 encode_claim_fh(xdr);
1512                 break;
1513         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1514                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1515                 break;
1516         default:
1517                 BUG();
1518         }
1519 }
1520
1521 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1522 {
1523         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524         encode_nfs4_stateid(xdr, arg->stateid);
1525         encode_nfs4_seqid(xdr, arg->seqid);
1526 }
1527
1528 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1529 {
1530         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531         encode_nfs4_stateid(xdr, arg->stateid);
1532         encode_nfs4_seqid(xdr, arg->seqid);
1533         encode_share_access(xdr, arg->fmode);
1534 }
1535
1536 static void
1537 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1538 {
1539         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540         encode_string(xdr, fh->size, fh->data);
1541 }
1542
1543 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1544 {
1545         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1546 }
1547
1548 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1549 {
1550         __be32 *p;
1551
1552         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1553         encode_nfs4_stateid(xdr, &args->stateid);
1554
1555         p = reserve_space(xdr, 12);
1556         p = xdr_encode_hyper(p, args->offset);
1557         *p = cpu_to_be32(args->count);
1558 }
1559
1560 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1561 {
1562         uint32_t attrs[3] = {
1563                 FATTR4_WORD0_RDATTR_ERROR,
1564                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1565         };
1566         uint32_t dircount = readdir->count >> 1;
1567         __be32 *p, verf[2];
1568
1569         if (readdir->plus) {
1570                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1571                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1572                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1573                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1574                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1575                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1576                 dircount >>= 1;
1577         }
1578         /* Use mounted_on_fileid only if the server supports it */
1579         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1580                 attrs[0] |= FATTR4_WORD0_FILEID;
1581
1582         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1583         encode_uint64(xdr, readdir->cookie);
1584         encode_nfs4_verifier(xdr, &readdir->verifier);
1585         p = reserve_space(xdr, encode_readdir_space);
1586         *p++ = cpu_to_be32(dircount);
1587         *p++ = cpu_to_be32(readdir->count);
1588         *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1589         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1590         *p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1591         if (encode_readdir_bitmask_sz > 2) {
1592                 if (hdr->minorversion > 1)
1593                         attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594                 p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1595         }
1596         memcpy(verf, readdir->verifier.data, sizeof(verf));
1597
1598         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1599                         __func__,
1600                         (unsigned long long)readdir->cookie,
1601                         verf[0], verf[1],
1602                         attrs[0] & readdir->bitmask[0],
1603                         attrs[1] & readdir->bitmask[1],
1604                         attrs[2] & readdir->bitmask[2]);
1605 }
1606
1607 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1608 {
1609         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1610 }
1611
1612 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1613 {
1614         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1615         encode_string(xdr, name->len, name->name);
1616 }
1617
1618 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1619 {
1620         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1621         encode_string(xdr, oldname->len, oldname->name);
1622         encode_string(xdr, newname->len, newname->name);
1623 }
1624
1625 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1626                          struct compound_hdr *hdr)
1627 {
1628         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1629         encode_uint64(xdr, clid);
1630 }
1631
1632 static void
1633 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1636 }
1637
1638 static void
1639 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1640 {
1641         __be32 *p;
1642
1643         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1644         encode_nfs4_stateid(xdr, &zero_stateid);
1645         p = reserve_space(xdr, 2*4);
1646         *p++ = cpu_to_be32(1);
1647         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1648         p = reserve_space(xdr, 4);
1649         *p = cpu_to_be32(arg->acl_len);
1650         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1651 }
1652
1653 static void
1654 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1655 {
1656         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1657 }
1658
1659 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1660 {
1661         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1662         encode_nfs4_stateid(xdr, &arg->stateid);
1663         encode_attrs(xdr, arg->iap, arg->label, server);
1664 }
1665
1666 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1667 {
1668         __be32 *p;
1669
1670         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1671         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1672
1673         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1674         p = reserve_space(xdr, 4);
1675         *p = cpu_to_be32(setclientid->sc_prog);
1676         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1677         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1678         p = reserve_space(xdr, 4);
1679         *p = cpu_to_be32(setclientid->sc_cb_ident);
1680 }
1681
1682 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1683 {
1684         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1685                         decode_setclientid_confirm_maxsz, hdr);
1686         encode_uint64(xdr, arg->clientid);
1687         encode_nfs4_verifier(xdr, &arg->confirm);
1688 }
1689
1690 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1691 {
1692         __be32 *p;
1693
1694         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1695         encode_nfs4_stateid(xdr, &args->stateid);
1696
1697         p = reserve_space(xdr, 16);
1698         p = xdr_encode_hyper(p, args->offset);
1699         *p++ = cpu_to_be32(args->stable);
1700         *p = cpu_to_be32(args->count);
1701
1702         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1703 }
1704
1705 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1706 {
1707         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1708         encode_nfs4_stateid(xdr, stateid);
1709 }
1710
1711 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1712 {
1713         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1714         encode_string(xdr, name->len, name->name);
1715 }
1716
1717 #if defined(CONFIG_NFS_V4_1)
1718 /* NFSv4.1 operations */
1719 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1720                                    struct nfs4_session *session,
1721                                    struct compound_hdr *hdr)
1722 {
1723         __be32 *p;
1724
1725         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1726                 decode_bind_conn_to_session_maxsz, hdr);
1727         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1728         p = xdr_reserve_space(xdr, 8);
1729         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1730         *p = 0; /* use_conn_in_rdma_mode = False */
1731 }
1732
1733 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1734 {
1735         unsigned int i;
1736         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1737         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1738                 encode_uint32(xdr, op_map->u.words[i]);
1739 }
1740
1741 static void encode_exchange_id(struct xdr_stream *xdr,
1742                                struct nfs41_exchange_id_args *args,
1743                                struct compound_hdr *hdr)
1744 {
1745         __be32 *p;
1746         char impl_name[IMPL_NAME_LIMIT];
1747         int len = 0;
1748
1749         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1750         encode_nfs4_verifier(xdr, args->verifier);
1751
1752         encode_string(xdr, args->id_len, args->id);
1753
1754         encode_uint32(xdr, args->flags);
1755         encode_uint32(xdr, args->state_protect.how);
1756
1757         switch (args->state_protect.how) {
1758         case SP4_NONE:
1759                 break;
1760         case SP4_MACH_CRED:
1761                 encode_op_map(xdr, &args->state_protect.enforce);
1762                 encode_op_map(xdr, &args->state_protect.allow);
1763                 break;
1764         default:
1765                 WARN_ON_ONCE(1);
1766                 break;
1767         }
1768
1769         if (send_implementation_id &&
1770             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1771             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1772                 <= sizeof(impl_name) + 1)
1773                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1774                                utsname()->sysname, utsname()->release,
1775                                utsname()->version, utsname()->machine);
1776
1777         if (len > 0) {
1778                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1779
1780                 encode_string(xdr,
1781                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1782                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1783                 encode_string(xdr, len, impl_name);
1784                 /* just send zeros for nii_date - the date is in nii_name */
1785                 p = reserve_space(xdr, 12);
1786                 p = xdr_encode_hyper(p, 0);
1787                 *p = cpu_to_be32(0);
1788         } else
1789                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1790 }
1791
1792 static void encode_create_session(struct xdr_stream *xdr,
1793                                   struct nfs41_create_session_args *args,
1794                                   struct compound_hdr *hdr)
1795 {
1796         __be32 *p;
1797         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1798         uint32_t len;
1799         struct nfs_client *clp = args->client;
1800         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1801         u32 max_resp_sz_cached;
1802
1803         /*
1804          * Assumes OPEN is the biggest non-idempotent compound.
1805          * 2 is the verifier.
1806          */
1807         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1808                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1809
1810         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1811                         clp->cl_ipaddr);
1812
1813         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1814         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1815         p = xdr_encode_hyper(p, clp->cl_clientid);
1816         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1817         *p++ = cpu_to_be32(args->flags);                        /*flags */
1818
1819         /* Fore Channel */
1820         *p++ = cpu_to_be32(0);                          /* header padding size */
1821         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1822         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1823         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1824         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1825         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1826         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1827
1828         /* Back Channel */
1829         *p++ = cpu_to_be32(0);                          /* header padding size */
1830         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1831         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1832         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1833         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1834         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1835         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1836
1837         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1838         *p++ = cpu_to_be32(1);
1839         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1840
1841         /* authsys_parms rfc1831 */
1842         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1843         p = xdr_encode_opaque(p, machine_name, len);
1844         *p++ = cpu_to_be32(0);                          /* UID */
1845         *p++ = cpu_to_be32(0);                          /* GID */
1846         *p = cpu_to_be32(0);                            /* No more gids */
1847 }
1848
1849 static void encode_destroy_session(struct xdr_stream *xdr,
1850                                    struct nfs4_session *session,
1851                                    struct compound_hdr *hdr)
1852 {
1853         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1854         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1855 }
1856
1857 static void encode_destroy_clientid(struct xdr_stream *xdr,
1858                                    uint64_t clientid,
1859                                    struct compound_hdr *hdr)
1860 {
1861         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1862         encode_uint64(xdr, clientid);
1863 }
1864
1865 static void encode_reclaim_complete(struct xdr_stream *xdr,
1866                                     struct nfs41_reclaim_complete_args *args,
1867                                     struct compound_hdr *hdr)
1868 {
1869         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1870         encode_uint32(xdr, args->one_fs);
1871 }
1872 #endif /* CONFIG_NFS_V4_1 */
1873
1874 static void encode_sequence(struct xdr_stream *xdr,
1875                             const struct nfs4_sequence_args *args,
1876                             struct compound_hdr *hdr)
1877 {
1878 #if defined(CONFIG_NFS_V4_1)
1879         struct nfs4_session *session;
1880         struct nfs4_slot_table *tp;
1881         struct nfs4_slot *slot = args->sa_slot;
1882         __be32 *p;
1883
1884         tp = slot->table;
1885         session = tp->session;
1886         if (!session)
1887                 return;
1888
1889         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1890
1891         /*
1892          * Sessionid + seqid + slotid + max slotid + cache_this
1893          */
1894         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1895                 "max_slotid=%d cache_this=%d\n",
1896                 __func__,
1897                 ((u32 *)session->sess_id.data)[0],
1898                 ((u32 *)session->sess_id.data)[1],
1899                 ((u32 *)session->sess_id.data)[2],
1900                 ((u32 *)session->sess_id.data)[3],
1901                 slot->seq_nr, slot->slot_nr,
1902                 tp->highest_used_slotid, args->sa_cache_this);
1903         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1904         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1905         *p++ = cpu_to_be32(slot->seq_nr);
1906         *p++ = cpu_to_be32(slot->slot_nr);
1907         *p++ = cpu_to_be32(tp->highest_used_slotid);
1908         *p = cpu_to_be32(args->sa_cache_this);
1909 #endif /* CONFIG_NFS_V4_1 */
1910 }
1911
1912 #ifdef CONFIG_NFS_V4_1
1913 static void
1914 encode_getdevicelist(struct xdr_stream *xdr,
1915                      const struct nfs4_getdevicelist_args *args,
1916                      struct compound_hdr *hdr)
1917 {
1918         __be32 *p;
1919         nfs4_verifier dummy = {
1920                 .data = "dummmmmy",
1921         };
1922
1923         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1924         p = reserve_space(xdr, 16);
1925         *p++ = cpu_to_be32(args->layoutclass);
1926         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1927         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1928         encode_nfs4_verifier(xdr, &dummy);
1929 }
1930
1931 static void
1932 encode_getdeviceinfo(struct xdr_stream *xdr,
1933                      const struct nfs4_getdeviceinfo_args *args,
1934                      struct compound_hdr *hdr)
1935 {
1936         __be32 *p;
1937
1938         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1939         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1940         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1941                                     NFS4_DEVICEID4_SIZE);
1942         *p++ = cpu_to_be32(args->pdev->layout_type);
1943         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1944         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1945 }
1946
1947 static void
1948 encode_layoutget(struct xdr_stream *xdr,
1949                       const struct nfs4_layoutget_args *args,
1950                       struct compound_hdr *hdr)
1951 {
1952         __be32 *p;
1953
1954         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1955         p = reserve_space(xdr, 36);
1956         *p++ = cpu_to_be32(0);     /* Signal layout available */
1957         *p++ = cpu_to_be32(args->type);
1958         *p++ = cpu_to_be32(args->range.iomode);
1959         p = xdr_encode_hyper(p, args->range.offset);
1960         p = xdr_encode_hyper(p, args->range.length);
1961         p = xdr_encode_hyper(p, args->minlength);
1962         encode_nfs4_stateid(xdr, &args->stateid);
1963         encode_uint32(xdr, args->maxcount);
1964
1965         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1966                 __func__,
1967                 args->type,
1968                 args->range.iomode,
1969                 (unsigned long)args->range.offset,
1970                 (unsigned long)args->range.length,
1971                 args->maxcount);
1972 }
1973
1974 static int
1975 encode_layoutcommit(struct xdr_stream *xdr,
1976                     struct inode *inode,
1977                     const struct nfs4_layoutcommit_args *args,
1978                     struct compound_hdr *hdr)
1979 {
1980         __be32 *p;
1981
1982         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1983                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1984
1985         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1986         p = reserve_space(xdr, 20);
1987         /* Only whole file layouts */
1988         p = xdr_encode_hyper(p, 0); /* offset */
1989         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1990         *p = cpu_to_be32(0); /* reclaim */
1991         encode_nfs4_stateid(xdr, &args->stateid);
1992         p = reserve_space(xdr, 20);
1993         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1994         p = xdr_encode_hyper(p, args->lastbytewritten);
1995         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1996         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1997
1998         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1999                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2000                         NFS_I(inode)->layout, xdr, args);
2001         else
2002                 encode_uint32(xdr, 0); /* no layout-type payload */
2003
2004         return 0;
2005 }
2006
2007 static void
2008 encode_layoutreturn(struct xdr_stream *xdr,
2009                     const struct nfs4_layoutreturn_args *args,
2010                     struct compound_hdr *hdr)
2011 {
2012         __be32 *p;
2013
2014         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2015         p = reserve_space(xdr, 16);
2016         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2017         *p++ = cpu_to_be32(args->layout_type);
2018         *p++ = cpu_to_be32(IOMODE_ANY);
2019         *p = cpu_to_be32(RETURN_FILE);
2020         p = reserve_space(xdr, 16);
2021         p = xdr_encode_hyper(p, 0);
2022         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2023         spin_lock(&args->inode->i_lock);
2024         encode_nfs4_stateid(xdr, &args->stateid);
2025         spin_unlock(&args->inode->i_lock);
2026         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2027                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2028                         NFS_I(args->inode)->layout, xdr, args);
2029         } else
2030                 encode_uint32(xdr, 0);
2031 }
2032
2033 static int
2034 encode_secinfo_no_name(struct xdr_stream *xdr,
2035                        const struct nfs41_secinfo_no_name_args *args,
2036                        struct compound_hdr *hdr)
2037 {
2038         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2039         encode_uint32(xdr, args->style);
2040         return 0;
2041 }
2042
2043 static void encode_test_stateid(struct xdr_stream *xdr,
2044                                 struct nfs41_test_stateid_args *args,
2045                                 struct compound_hdr *hdr)
2046 {
2047         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2048         encode_uint32(xdr, 1);
2049         encode_nfs4_stateid(xdr, args->stateid);
2050 }
2051
2052 static void encode_free_stateid(struct xdr_stream *xdr,
2053                                 struct nfs41_free_stateid_args *args,
2054                                 struct compound_hdr *hdr)
2055 {
2056         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057         encode_nfs4_stateid(xdr, &args->stateid);
2058 }
2059 #endif /* CONFIG_NFS_V4_1 */
2060
2061 /*
2062  * END OF "GENERIC" ENCODE ROUTINES.
2063  */
2064
2065 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2066 {
2067 #if defined(CONFIG_NFS_V4_1)
2068         struct nfs4_session *session = args->sa_slot->table->session;
2069         if (session)
2070                 return session->clp->cl_mvops->minor_version;
2071 #endif /* CONFIG_NFS_V4_1 */
2072         return 0;
2073 }
2074
2075 /*
2076  * Encode an ACCESS request
2077  */
2078 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2079                                 const struct nfs4_accessargs *args)
2080 {
2081         struct compound_hdr hdr = {
2082                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083         };
2084
2085         encode_compound_hdr(xdr, req, &hdr);
2086         encode_sequence(xdr, &args->seq_args, &hdr);
2087         encode_putfh(xdr, args->fh, &hdr);
2088         encode_access(xdr, args->access, &hdr);
2089         encode_getfattr(xdr, args->bitmask, &hdr);
2090         encode_nops(&hdr);
2091 }
2092
2093 /*
2094  * Encode LOOKUP request
2095  */
2096 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2097                                 const struct nfs4_lookup_arg *args)
2098 {
2099         struct compound_hdr hdr = {
2100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101         };
2102
2103         encode_compound_hdr(xdr, req, &hdr);
2104         encode_sequence(xdr, &args->seq_args, &hdr);
2105         encode_putfh(xdr, args->dir_fh, &hdr);
2106         encode_lookup(xdr, args->name, &hdr);
2107         encode_getfh(xdr, &hdr);
2108         encode_getfattr(xdr, args->bitmask, &hdr);
2109         encode_nops(&hdr);
2110 }
2111
2112 /*
2113  * Encode LOOKUP_ROOT request
2114  */
2115 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2116                                      struct xdr_stream *xdr,
2117                                      const struct nfs4_lookup_root_arg *args)
2118 {
2119         struct compound_hdr hdr = {
2120                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121         };
2122
2123         encode_compound_hdr(xdr, req, &hdr);
2124         encode_sequence(xdr, &args->seq_args, &hdr);
2125         encode_putrootfh(xdr, &hdr);
2126         encode_getfh(xdr, &hdr);
2127         encode_getfattr(xdr, args->bitmask, &hdr);
2128         encode_nops(&hdr);
2129 }
2130
2131 /*
2132  * Encode REMOVE request
2133  */
2134 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2135                                 const struct nfs_removeargs *args)
2136 {
2137         struct compound_hdr hdr = {
2138                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139         };
2140
2141         encode_compound_hdr(xdr, req, &hdr);
2142         encode_sequence(xdr, &args->seq_args, &hdr);
2143         encode_putfh(xdr, args->fh, &hdr);
2144         encode_remove(xdr, &args->name, &hdr);
2145         encode_nops(&hdr);
2146 }
2147
2148 /*
2149  * Encode RENAME request
2150  */
2151 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                 const struct nfs_renameargs *args)
2153 {
2154         struct compound_hdr hdr = {
2155                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156         };
2157
2158         encode_compound_hdr(xdr, req, &hdr);
2159         encode_sequence(xdr, &args->seq_args, &hdr);
2160         encode_putfh(xdr, args->old_dir, &hdr);
2161         encode_savefh(xdr, &hdr);
2162         encode_putfh(xdr, args->new_dir, &hdr);
2163         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164         encode_nops(&hdr);
2165 }
2166
2167 /*
2168  * Encode LINK request
2169  */
2170 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2171                              const struct nfs4_link_arg *args)
2172 {
2173         struct compound_hdr hdr = {
2174                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175         };
2176
2177         encode_compound_hdr(xdr, req, &hdr);
2178         encode_sequence(xdr, &args->seq_args, &hdr);
2179         encode_putfh(xdr, args->fh, &hdr);
2180         encode_savefh(xdr, &hdr);
2181         encode_putfh(xdr, args->dir_fh, &hdr);
2182         encode_link(xdr, args->name, &hdr);
2183         encode_restorefh(xdr, &hdr);
2184         encode_getfattr(xdr, args->bitmask, &hdr);
2185         encode_nops(&hdr);
2186 }
2187
2188 /*
2189  * Encode CREATE request
2190  */
2191 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2192                                 const struct nfs4_create_arg *args)
2193 {
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         encode_compound_hdr(xdr, req, &hdr);
2199         encode_sequence(xdr, &args->seq_args, &hdr);
2200         encode_putfh(xdr, args->dir_fh, &hdr);
2201         encode_create(xdr, args, &hdr);
2202         encode_getfh(xdr, &hdr);
2203         encode_getfattr(xdr, args->bitmask, &hdr);
2204         encode_nops(&hdr);
2205 }
2206
2207 /*
2208  * Encode SYMLINK request
2209  */
2210 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                                  const struct nfs4_create_arg *args)
2212 {
2213         nfs4_xdr_enc_create(req, xdr, args);
2214 }
2215
2216 /*
2217  * Encode GETATTR request
2218  */
2219 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2220                                  const struct nfs4_getattr_arg *args)
2221 {
2222         struct compound_hdr hdr = {
2223                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224         };
2225
2226         encode_compound_hdr(xdr, req, &hdr);
2227         encode_sequence(xdr, &args->seq_args, &hdr);
2228         encode_putfh(xdr, args->fh, &hdr);
2229         encode_getfattr(xdr, args->bitmask, &hdr);
2230         encode_nops(&hdr);
2231 }
2232
2233 /*
2234  * Encode a CLOSE request
2235  */
2236 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2237                                struct nfs_closeargs *args)
2238 {
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_close(xdr, args, &hdr);
2247         encode_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode an OPEN request
2253  */
2254 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                               struct nfs_openargs *args)
2256 {
2257         struct compound_hdr hdr = {
2258                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259         };
2260
2261         encode_compound_hdr(xdr, req, &hdr);
2262         encode_sequence(xdr, &args->seq_args, &hdr);
2263         encode_putfh(xdr, args->fh, &hdr);
2264         encode_open(xdr, args, &hdr);
2265         encode_getfh(xdr, &hdr);
2266         if (args->access)
2267                 encode_access(xdr, args->access, &hdr);
2268         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269         encode_nops(&hdr);
2270 }
2271
2272 /*
2273  * Encode an OPEN_CONFIRM request
2274  */
2275 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2276                                       struct xdr_stream *xdr,
2277                                       struct nfs_open_confirmargs *args)
2278 {
2279         struct compound_hdr hdr = {
2280                 .nops   = 0,
2281         };
2282
2283         encode_compound_hdr(xdr, req, &hdr);
2284         encode_putfh(xdr, args->fh, &hdr);
2285         encode_open_confirm(xdr, args, &hdr);
2286         encode_nops(&hdr);
2287 }
2288
2289 /*
2290  * Encode an OPEN request with no attributes.
2291  */
2292 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2293                                      struct xdr_stream *xdr,
2294                                      struct nfs_openargs *args)
2295 {
2296         struct compound_hdr hdr = {
2297                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298         };
2299
2300         encode_compound_hdr(xdr, req, &hdr);
2301         encode_sequence(xdr, &args->seq_args, &hdr);
2302         encode_putfh(xdr, args->fh, &hdr);
2303         encode_open(xdr, args, &hdr);
2304         if (args->access)
2305                 encode_access(xdr, args->access, &hdr);
2306         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307         encode_nops(&hdr);
2308 }
2309
2310 /*
2311  * Encode an OPEN_DOWNGRADE request
2312  */
2313 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2314                                         struct xdr_stream *xdr,
2315                                         struct nfs_closeargs *args)
2316 {
2317         struct compound_hdr hdr = {
2318                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319         };
2320
2321         encode_compound_hdr(xdr, req, &hdr);
2322         encode_sequence(xdr, &args->seq_args, &hdr);
2323         encode_putfh(xdr, args->fh, &hdr);
2324         encode_open_downgrade(xdr, args, &hdr);
2325         encode_getfattr(xdr, args->bitmask, &hdr);
2326         encode_nops(&hdr);
2327 }
2328
2329 /*
2330  * Encode a LOCK request
2331  */
2332 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2333                               struct nfs_lock_args *args)
2334 {
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         encode_compound_hdr(xdr, req, &hdr);
2340         encode_sequence(xdr, &args->seq_args, &hdr);
2341         encode_putfh(xdr, args->fh, &hdr);
2342         encode_lock(xdr, args, &hdr);
2343         encode_nops(&hdr);
2344 }
2345
2346 /*
2347  * Encode a LOCKT request
2348  */
2349 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2350                                struct nfs_lockt_args *args)
2351 {
2352         struct compound_hdr hdr = {
2353                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354         };
2355
2356         encode_compound_hdr(xdr, req, &hdr);
2357         encode_sequence(xdr, &args->seq_args, &hdr);
2358         encode_putfh(xdr, args->fh, &hdr);
2359         encode_lockt(xdr, args, &hdr);
2360         encode_nops(&hdr);
2361 }
2362
2363 /*
2364  * Encode a LOCKU request
2365  */
2366 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2367                                struct nfs_locku_args *args)
2368 {
2369         struct compound_hdr hdr = {
2370                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371         };
2372
2373         encode_compound_hdr(xdr, req, &hdr);
2374         encode_sequence(xdr, &args->seq_args, &hdr);
2375         encode_putfh(xdr, args->fh, &hdr);
2376         encode_locku(xdr, args, &hdr);
2377         encode_nops(&hdr);
2378 }
2379
2380 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2381                                            struct xdr_stream *xdr,
2382                                         struct nfs_release_lockowner_args *args)
2383 {
2384         struct compound_hdr hdr = {
2385                 .minorversion = 0,
2386         };
2387
2388         encode_compound_hdr(xdr, req, &hdr);
2389         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390         encode_nops(&hdr);
2391 }
2392
2393 /*
2394  * Encode a READLINK request
2395  */
2396 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2397                                   const struct nfs4_readlink *args)
2398 {
2399         struct compound_hdr hdr = {
2400                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401         };
2402
2403         encode_compound_hdr(xdr, req, &hdr);
2404         encode_sequence(xdr, &args->seq_args, &hdr);
2405         encode_putfh(xdr, args->fh, &hdr);
2406         encode_readlink(xdr, args, req, &hdr);
2407
2408         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409                         args->pgbase, args->pglen);
2410         encode_nops(&hdr);
2411 }
2412
2413 /*
2414  * Encode a READDIR request
2415  */
2416 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2417                                  const struct nfs4_readdir_arg *args)
2418 {
2419         struct compound_hdr hdr = {
2420                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2421         };
2422
2423         encode_compound_hdr(xdr, req, &hdr);
2424         encode_sequence(xdr, &args->seq_args, &hdr);
2425         encode_putfh(xdr, args->fh, &hdr);
2426         encode_readdir(xdr, args, req, &hdr);
2427
2428         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429                          args->pgbase, args->count);
2430         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431                         __func__, hdr.replen << 2, args->pages,
2432                         args->pgbase, args->count);
2433         encode_nops(&hdr);
2434 }
2435
2436 /*
2437  * Encode a READ request
2438  */
2439 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                               struct nfs_readargs *args)
2441 {
2442         struct compound_hdr hdr = {
2443                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444         };
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         encode_read(xdr, args, &hdr);
2450
2451         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2452                          args->pages, args->pgbase, args->count);
2453         req->rq_rcv_buf.flags |= XDRBUF_READ;
2454         encode_nops(&hdr);
2455 }
2456
2457 /*
2458  * Encode an SETATTR request
2459  */
2460 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2461                                  struct nfs_setattrargs *args)
2462 {
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_setattr(xdr, args, args->server, &hdr);
2471         encode_getfattr(xdr, args->bitmask, &hdr);
2472         encode_nops(&hdr);
2473 }
2474
2475 /*
2476  * Encode a GETACL request
2477  */
2478 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2479                                 struct nfs_getaclargs *args)
2480 {
2481         struct compound_hdr hdr = {
2482                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483         };
2484         uint32_t replen;
2485
2486         encode_compound_hdr(xdr, req, &hdr);
2487         encode_sequence(xdr, &args->seq_args, &hdr);
2488         encode_putfh(xdr, args->fh, &hdr);
2489         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491
2492         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493                 args->acl_pages, args->acl_pgbase, args->acl_len);
2494
2495         encode_nops(&hdr);
2496 }
2497
2498 /*
2499  * Encode a WRITE request
2500  */
2501 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2502                                struct nfs_writeargs *args)
2503 {
2504         struct compound_hdr hdr = {
2505                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_sequence(xdr, &args->seq_args, &hdr);
2510         encode_putfh(xdr, args->fh, &hdr);
2511         encode_write(xdr, args, &hdr);
2512         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513         if (args->bitmask)
2514                 encode_getfattr(xdr, args->bitmask, &hdr);
2515         encode_nops(&hdr);
2516 }
2517
2518 /*
2519  *  a COMMIT request
2520  */
2521 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                 struct nfs_commitargs *args)
2523 {
2524         struct compound_hdr hdr = {
2525                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2526         };
2527
2528         encode_compound_hdr(xdr, req, &hdr);
2529         encode_sequence(xdr, &args->seq_args, &hdr);
2530         encode_putfh(xdr, args->fh, &hdr);
2531         encode_commit(xdr, args, &hdr);
2532         encode_nops(&hdr);
2533 }
2534
2535 /*
2536  * FSINFO request
2537  */
2538 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2539                                 struct nfs4_fsinfo_arg *args)
2540 {
2541         struct compound_hdr hdr = {
2542                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543         };
2544
2545         encode_compound_hdr(xdr, req, &hdr);
2546         encode_sequence(xdr, &args->seq_args, &hdr);
2547         encode_putfh(xdr, args->fh, &hdr);
2548         encode_fsinfo(xdr, args->bitmask, &hdr);
2549         encode_nops(&hdr);
2550 }
2551
2552 /*
2553  * a PATHCONF request
2554  */
2555 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                   const struct nfs4_pathconf_arg *args)
2557 {
2558         struct compound_hdr hdr = {
2559                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560         };
2561
2562         encode_compound_hdr(xdr, req, &hdr);
2563         encode_sequence(xdr, &args->seq_args, &hdr);
2564         encode_putfh(xdr, args->fh, &hdr);
2565         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566                            &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * a STATFS request
2572  */
2573 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                 const struct nfs4_statfs_arg *args)
2575 {
2576         struct compound_hdr hdr = {
2577                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_sequence(xdr, &args->seq_args, &hdr);
2582         encode_putfh(xdr, args->fh, &hdr);
2583         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585         encode_nops(&hdr);
2586 }
2587
2588 /*
2589  * GETATTR_BITMAP request
2590  */
2591 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2592                                      struct xdr_stream *xdr,
2593                                      struct nfs4_server_caps_arg *args)
2594 {
2595         struct compound_hdr hdr = {
2596                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597         };
2598
2599         encode_compound_hdr(xdr, req, &hdr);
2600         encode_sequence(xdr, &args->seq_args, &hdr);
2601         encode_putfh(xdr, args->fhandle, &hdr);
2602         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2604                            FATTR4_WORD0_LINK_SUPPORT|
2605                            FATTR4_WORD0_SYMLINK_SUPPORT|
2606                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2607         encode_nops(&hdr);
2608 }
2609
2610 /*
2611  * a RENEW request
2612  */
2613 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2614                                struct nfs_client *clp)
2615 {
2616         struct compound_hdr hdr = {
2617                 .nops   = 0,
2618         };
2619
2620         encode_compound_hdr(xdr, req, &hdr);
2621         encode_renew(xdr, clp->cl_clientid, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * a SETCLIENTID request
2627  */
2628 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2629                                      struct xdr_stream *xdr,
2630                                      struct nfs4_setclientid *sc)
2631 {
2632         struct compound_hdr hdr = {
2633                 .nops   = 0,
2634         };
2635
2636         encode_compound_hdr(xdr, req, &hdr);
2637         encode_setclientid(xdr, sc, &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a SETCLIENTID_CONFIRM request
2643  */
2644 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2645                                              struct xdr_stream *xdr,
2646                                              struct nfs4_setclientid_res *arg)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_setclientid_confirm(xdr, arg, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * DELEGRETURN request
2659  */
2660 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2661                                      struct xdr_stream *xdr,
2662                                      const struct nfs4_delegreturnargs *args)
2663 {
2664         struct compound_hdr hdr = {
2665                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_sequence(xdr, &args->seq_args, &hdr);
2670         encode_putfh(xdr, args->fhandle, &hdr);
2671         encode_getfattr(xdr, args->bitmask, &hdr);
2672         encode_delegreturn(xdr, args->stateid, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 /*
2677  * Encode FS_LOCATIONS request
2678  */
2679 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2680                                       struct xdr_stream *xdr,
2681                                       struct nfs4_fs_locations_arg *args)
2682 {
2683         struct compound_hdr hdr = {
2684                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685         };
2686         uint32_t replen;
2687
2688         encode_compound_hdr(xdr, req, &hdr);
2689         encode_sequence(xdr, &args->seq_args, &hdr);
2690         encode_putfh(xdr, args->dir_fh, &hdr);
2691         encode_lookup(xdr, args->name, &hdr);
2692         replen = hdr.replen;    /* get the attribute into args->page */
2693         encode_fs_locations(xdr, args->bitmask, &hdr);
2694
2695         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2696                         0, PAGE_SIZE);
2697         encode_nops(&hdr);
2698 }
2699
2700 /*
2701  * Encode SECINFO request
2702  */
2703 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2704                                 struct xdr_stream *xdr,
2705                                 struct nfs4_secinfo_arg *args)
2706 {
2707         struct compound_hdr hdr = {
2708                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2709         };
2710
2711         encode_compound_hdr(xdr, req, &hdr);
2712         encode_sequence(xdr, &args->seq_args, &hdr);
2713         encode_putfh(xdr, args->dir_fh, &hdr);
2714         encode_secinfo(xdr, args->name, &hdr);
2715         encode_nops(&hdr);
2716 }
2717
2718 #if defined(CONFIG_NFS_V4_1)
2719 /*
2720  * BIND_CONN_TO_SESSION request
2721  */
2722 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2723                                 struct xdr_stream *xdr,
2724                                 struct nfs_client *clp)
2725 {
2726         struct compound_hdr hdr = {
2727                 .minorversion = clp->cl_mvops->minor_version,
2728         };
2729
2730         encode_compound_hdr(xdr, req, &hdr);
2731         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * EXCHANGE_ID request
2737  */
2738 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2739                                      struct xdr_stream *xdr,
2740                                      struct nfs41_exchange_id_args *args)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = args->client->cl_mvops->minor_version,
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_exchange_id(xdr, args, &hdr);
2748         encode_nops(&hdr);
2749 }
2750
2751 /*
2752  * a CREATE_SESSION request
2753  */
2754 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2755                                         struct xdr_stream *xdr,
2756                                         struct nfs41_create_session_args *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = args->client->cl_mvops->minor_version,
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_create_session(xdr, args, &hdr);
2764         encode_nops(&hdr);
2765 }
2766
2767 /*
2768  * a DESTROY_SESSION request
2769  */
2770 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2771                                          struct xdr_stream *xdr,
2772                                          struct nfs4_session *session)
2773 {
2774         struct compound_hdr hdr = {
2775                 .minorversion = session->clp->cl_mvops->minor_version,
2776         };
2777
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_destroy_session(xdr, session, &hdr);
2780         encode_nops(&hdr);
2781 }
2782
2783 /*
2784  * a DESTROY_CLIENTID request
2785  */
2786 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2787                                          struct xdr_stream *xdr,
2788                                          struct nfs_client *clp)
2789 {
2790         struct compound_hdr hdr = {
2791                 .minorversion = clp->cl_mvops->minor_version,
2792         };
2793
2794         encode_compound_hdr(xdr, req, &hdr);
2795         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * a SEQUENCE request
2801  */
2802 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2803                                   struct nfs4_sequence_args *args)
2804 {
2805         struct compound_hdr hdr = {
2806                 .minorversion = nfs4_xdr_minorversion(args),
2807         };
2808
2809         encode_compound_hdr(xdr, req, &hdr);
2810         encode_sequence(xdr, args, &hdr);
2811         encode_nops(&hdr);
2812 }
2813
2814 /*
2815  * a GET_LEASE_TIME request
2816  */
2817 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2818                                         struct xdr_stream *xdr,
2819                                         struct nfs4_get_lease_time_args *args)
2820 {
2821         struct compound_hdr hdr = {
2822                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2823         };
2824         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2825
2826         encode_compound_hdr(xdr, req, &hdr);
2827         encode_sequence(xdr, &args->la_seq_args, &hdr);
2828         encode_putrootfh(xdr, &hdr);
2829         encode_fsinfo(xdr, lease_bitmap, &hdr);
2830         encode_nops(&hdr);
2831 }
2832
2833 /*
2834  * a RECLAIM_COMPLETE request
2835  */
2836 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2837                                           struct xdr_stream *xdr,
2838                                 struct nfs41_reclaim_complete_args *args)
2839 {
2840         struct compound_hdr hdr = {
2841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2842         };
2843
2844         encode_compound_hdr(xdr, req, &hdr);
2845         encode_sequence(xdr, &args->seq_args, &hdr);
2846         encode_reclaim_complete(xdr, args, &hdr);
2847         encode_nops(&hdr);
2848 }
2849
2850 /*
2851  * Encode GETDEVICELIST request
2852  */
2853 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2854                                        struct xdr_stream *xdr,
2855                                        struct nfs4_getdevicelist_args *args)
2856 {
2857         struct compound_hdr hdr = {
2858                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859         };
2860
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_sequence(xdr, &args->seq_args, &hdr);
2863         encode_putfh(xdr, args->fh, &hdr);
2864         encode_getdevicelist(xdr, args, &hdr);
2865         encode_nops(&hdr);
2866 }
2867
2868 /*
2869  * Encode GETDEVICEINFO request
2870  */
2871 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2872                                        struct xdr_stream *xdr,
2873                                        struct nfs4_getdeviceinfo_args *args)
2874 {
2875         struct compound_hdr hdr = {
2876                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2877         };
2878
2879         encode_compound_hdr(xdr, req, &hdr);
2880         encode_sequence(xdr, &args->seq_args, &hdr);
2881         encode_getdeviceinfo(xdr, args, &hdr);
2882
2883         /* set up reply kvec. Subtract notification bitmap max size (2)
2884          * so that notification bitmap is put in xdr_buf tail */
2885         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2886                          args->pdev->pages, args->pdev->pgbase,
2887                          args->pdev->pglen);
2888
2889         encode_nops(&hdr);
2890 }
2891
2892 /*
2893  *  Encode LAYOUTGET request
2894  */
2895 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2896                                    struct xdr_stream *xdr,
2897                                    struct nfs4_layoutget_args *args)
2898 {
2899         struct compound_hdr hdr = {
2900                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2901         };
2902
2903         encode_compound_hdr(xdr, req, &hdr);
2904         encode_sequence(xdr, &args->seq_args, &hdr);
2905         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2906         encode_layoutget(xdr, args, &hdr);
2907
2908         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2909             args->layout.pages, 0, args->layout.pglen);
2910
2911         encode_nops(&hdr);
2912 }
2913
2914 /*
2915  *  Encode LAYOUTCOMMIT request
2916  */
2917 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2918                                       struct xdr_stream *xdr,
2919                                       struct nfs4_layoutcommit_args *args)
2920 {
2921         struct nfs4_layoutcommit_data *data =
2922                 container_of(args, struct nfs4_layoutcommit_data, args);
2923         struct compound_hdr hdr = {
2924                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925         };
2926
2927         encode_compound_hdr(xdr, req, &hdr);
2928         encode_sequence(xdr, &args->seq_args, &hdr);
2929         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2930         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2931         encode_getfattr(xdr, args->bitmask, &hdr);
2932         encode_nops(&hdr);
2933 }
2934
2935 /*
2936  * Encode LAYOUTRETURN request
2937  */
2938 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2939                                       struct xdr_stream *xdr,
2940                                       struct nfs4_layoutreturn_args *args)
2941 {
2942         struct compound_hdr hdr = {
2943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944         };
2945
2946         encode_compound_hdr(xdr, req, &hdr);
2947         encode_sequence(xdr, &args->seq_args, &hdr);
2948         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2949         encode_layoutreturn(xdr, args, &hdr);
2950         encode_nops(&hdr);
2951 }
2952
2953 /*
2954  * Encode SECINFO_NO_NAME request
2955  */
2956 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2957                                         struct xdr_stream *xdr,
2958                                         struct nfs41_secinfo_no_name_args *args)
2959 {
2960         struct compound_hdr hdr = {
2961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2962         };
2963
2964         encode_compound_hdr(xdr, req, &hdr);
2965         encode_sequence(xdr, &args->seq_args, &hdr);
2966         encode_putrootfh(xdr, &hdr);
2967         encode_secinfo_no_name(xdr, args, &hdr);
2968         encode_nops(&hdr);
2969         return 0;
2970 }
2971
2972 /*
2973  *  Encode TEST_STATEID request
2974  */
2975 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2976                                       struct xdr_stream *xdr,
2977                                       struct nfs41_test_stateid_args *args)
2978 {
2979         struct compound_hdr hdr = {
2980                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2981         };
2982
2983         encode_compound_hdr(xdr, req, &hdr);
2984         encode_sequence(xdr, &args->seq_args, &hdr);
2985         encode_test_stateid(xdr, args, &hdr);
2986         encode_nops(&hdr);
2987 }
2988
2989 /*
2990  *  Encode FREE_STATEID request
2991  */
2992 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2993                                      struct xdr_stream *xdr,
2994                                      struct nfs41_free_stateid_args *args)
2995 {
2996         struct compound_hdr hdr = {
2997                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2998         };
2999
3000         encode_compound_hdr(xdr, req, &hdr);
3001         encode_sequence(xdr, &args->seq_args, &hdr);
3002         encode_free_stateid(xdr, args, &hdr);
3003         encode_nops(&hdr);
3004 }
3005 #endif /* CONFIG_NFS_V4_1 */
3006
3007 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3008 {
3009         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3010                 "Remaining buffer length is %tu words.\n",
3011                 func, xdr->end - xdr->p);
3012 }
3013
3014 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3015 {
3016         __be32 *p;
3017
3018         p = xdr_inline_decode(xdr, 4);
3019         if (unlikely(!p))
3020                 goto out_overflow;
3021         *len = be32_to_cpup(p);
3022         p = xdr_inline_decode(xdr, *len);
3023         if (unlikely(!p))
3024                 goto out_overflow;
3025         *string = (char *)p;
3026         return 0;
3027 out_overflow:
3028         print_overflow_msg(__func__, xdr);
3029         return -EIO;
3030 }
3031
3032 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3033 {
3034         __be32 *p;
3035
3036         p = xdr_inline_decode(xdr, 8);
3037         if (unlikely(!p))
3038                 goto out_overflow;
3039         hdr->status = be32_to_cpup(p++);
3040         hdr->taglen = be32_to_cpup(p);
3041
3042         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3043         if (unlikely(!p))
3044                 goto out_overflow;
3045         hdr->tag = (char *)p;
3046         p += XDR_QUADLEN(hdr->taglen);
3047         hdr->nops = be32_to_cpup(p);
3048         if (unlikely(hdr->nops < 1))
3049                 return nfs4_stat_to_errno(hdr->status);
3050         return 0;
3051 out_overflow:
3052         print_overflow_msg(__func__, xdr);
3053         return -EIO;
3054 }
3055
3056 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3057 {
3058         __be32 *p;
3059         uint32_t opnum;
3060         int32_t nfserr;
3061
3062         p = xdr_inline_decode(xdr, 8);
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         opnum = be32_to_cpup(p++);
3066         if (opnum != expected) {
3067                 dprintk("nfs: Server returned operation"
3068                         " %d but we issued a request for %d\n",
3069                                 opnum, expected);
3070                 return -EIO;
3071         }
3072         nfserr = be32_to_cpup(p);
3073         if (nfserr != NFS_OK)
3074                 return nfs4_stat_to_errno(nfserr);
3075         return 0;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080
3081 /* Dummy routine */
3082 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3083 {
3084         __be32 *p;
3085         unsigned int strlen;
3086         char *str;
3087
3088         p = xdr_inline_decode(xdr, 12);
3089         if (likely(p))
3090                 return decode_opaque_inline(xdr, &strlen, &str);
3091         print_overflow_msg(__func__, xdr);
3092         return -EIO;
3093 }
3094
3095 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3096 {
3097         uint32_t bmlen;
3098         __be32 *p;
3099
3100         p = xdr_inline_decode(xdr, 4);
3101         if (unlikely(!p))
3102                 goto out_overflow;
3103         bmlen = be32_to_cpup(p);
3104
3105         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3106         p = xdr_inline_decode(xdr, (bmlen << 2));
3107         if (unlikely(!p))
3108                 goto out_overflow;
3109         if (bmlen > 0) {
3110                 bitmap[0] = be32_to_cpup(p++);
3111                 if (bmlen > 1) {
3112                         bitmap[1] = be32_to_cpup(p++);
3113                         if (bmlen > 2)
3114                                 bitmap[2] = be32_to_cpup(p);
3115                 }
3116         }
3117         return 0;
3118 out_overflow:
3119         print_overflow_msg(__func__, xdr);
3120         return -EIO;
3121 }
3122
3123 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3124 {
3125         __be32 *p;
3126
3127         p = xdr_inline_decode(xdr, 4);
3128         if (unlikely(!p))
3129                 goto out_overflow;
3130         *attrlen = be32_to_cpup(p);
3131         *savep = xdr_stream_pos(xdr);
3132         return 0;
3133 out_overflow:
3134         print_overflow_msg(__func__, xdr);
3135         return -EIO;
3136 }
3137
3138 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3139 {
3140         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3141                 int ret;
3142                 ret = decode_attr_bitmap(xdr, bitmask);
3143                 if (unlikely(ret < 0))
3144                         return ret;
3145                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3146         } else
3147                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3148         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3149                 bitmask[0], bitmask[1], bitmask[2]);
3150         return 0;
3151 }
3152
3153 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3154 {
3155         __be32 *p;
3156         int ret = 0;
3157
3158         *type = 0;
3159         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3160                 return -EIO;
3161         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3162                 p = xdr_inline_decode(xdr, 4);
3163                 if (unlikely(!p))
3164                         goto out_overflow;
3165                 *type = be32_to_cpup(p);
3166                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3167                         dprintk("%s: bad type %d\n", __func__, *type);
3168                         return -EIO;
3169                 }
3170                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3171                 ret = NFS_ATTR_FATTR_TYPE;
3172         }
3173         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3174         return ret;
3175 out_overflow:
3176         print_overflow_msg(__func__, xdr);
3177         return -EIO;
3178 }
3179
3180 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3181                                       uint32_t *bitmap, uint32_t *type)
3182 {
3183         __be32 *p;
3184
3185         *type = 0;
3186         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3187                 return -EIO;
3188         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3189                 p = xdr_inline_decode(xdr, 4);
3190                 if (unlikely(!p))
3191                         goto out_overflow;
3192                 *type = be32_to_cpup(p);
3193                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3194         }
3195         dprintk("%s: expire type=0x%x\n", __func__, *type);
3196         return 0;
3197 out_overflow:
3198         print_overflow_msg(__func__, xdr);
3199         return -EIO;
3200 }
3201
3202 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3203 {
3204         __be32 *p;
3205         int ret = 0;
3206
3207         *change = 0;
3208         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3209                 return -EIO;
3210         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3211                 p = xdr_inline_decode(xdr, 8);
3212                 if (unlikely(!p))
3213                         goto out_overflow;
3214                 xdr_decode_hyper(p, change);
3215                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3216                 ret = NFS_ATTR_FATTR_CHANGE;
3217         }
3218         dprintk("%s: change attribute=%Lu\n", __func__,
3219                         (unsigned long long)*change);
3220         return ret;
3221 out_overflow:
3222         print_overflow_msg(__func__, xdr);
3223         return -EIO;
3224 }
3225
3226 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3227 {
3228         __be32 *p;
3229         int ret = 0;
3230
3231         *size = 0;
3232         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3233                 return -EIO;
3234         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3235                 p = xdr_inline_decode(xdr, 8);
3236                 if (unlikely(!p))
3237                         goto out_overflow;
3238                 xdr_decode_hyper(p, size);
3239                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3240                 ret = NFS_ATTR_FATTR_SIZE;
3241         }
3242         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3243         return ret;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248
3249 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3250 {
3251         __be32 *p;
3252
3253         *res = 0;
3254         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3255                 return -EIO;
3256         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3257                 p = xdr_inline_decode(xdr, 4);
3258                 if (unlikely(!p))
3259                         goto out_overflow;
3260                 *res = be32_to_cpup(p);
3261                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3262         }
3263         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3264         return 0;
3265 out_overflow:
3266         print_overflow_msg(__func__, xdr);
3267         return -EIO;
3268 }
3269
3270 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3271 {
3272         __be32 *p;
3273
3274         *res = 0;
3275         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3276                 return -EIO;
3277         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3278                 p = xdr_inline_decode(xdr, 4);
3279                 if (unlikely(!p))
3280                         goto out_overflow;
3281                 *res = be32_to_cpup(p);
3282                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3283         }
3284         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3285         return 0;
3286 out_overflow:
3287         print_overflow_msg(__func__, xdr);
3288         return -EIO;
3289 }
3290
3291 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3292 {
3293         __be32 *p;
3294         int ret = 0;
3295
3296         fsid->major = 0;
3297         fsid->minor = 0;
3298         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3299                 return -EIO;
3300         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3301                 p = xdr_inline_decode(xdr, 16);
3302                 if (unlikely(!p))
3303                         goto out_overflow;
3304                 p = xdr_decode_hyper(p, &fsid->major);
3305                 xdr_decode_hyper(p, &fsid->minor);
3306                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3307                 ret = NFS_ATTR_FATTR_FSID;
3308         }
3309         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3310                         (unsigned long long)fsid->major,
3311                         (unsigned long long)fsid->minor);
3312         return ret;
3313 out_overflow:
3314         print_overflow_msg(__func__, xdr);
3315         return -EIO;
3316 }
3317
3318 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3319 {
3320         __be32 *p;
3321
3322         *res = 60;
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 *res = be32_to_cpup(p);
3330                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3331         }
3332         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3333         return 0;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3340 {
3341         __be32 *p;
3342
3343         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3344                 return -EIO;
3345         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3346                 p = xdr_inline_decode(xdr, 4);
3347                 if (unlikely(!p))
3348                         goto out_overflow;
3349                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3350                 *res = -be32_to_cpup(p);
3351         }
3352         return 0;
3353 out_overflow:
3354         print_overflow_msg(__func__, xdr);
3355         return -EIO;
3356 }
3357
3358 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3359 {
3360         __be32 *p;
3361         int len;
3362
3363         if (fh != NULL)
3364                 memset(fh, 0, sizeof(*fh));
3365
3366         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3367                 return -EIO;
3368         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3369                 p = xdr_inline_decode(xdr, 4);
3370                 if (unlikely(!p))
3371                         goto out_overflow;
3372                 len = be32_to_cpup(p);
3373                 if (len > NFS4_FHSIZE)
3374                         return -EIO;
3375                 p = xdr_inline_decode(xdr, len);
3376                 if (unlikely(!p))
3377                         goto out_overflow;
3378                 if (fh != NULL) {
3379                         memcpy(fh->data, p, len);
3380                         fh->size = len;
3381                 }
3382                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3383         }
3384         return 0;
3385 out_overflow:
3386         print_overflow_msg(__func__, xdr);
3387         return -EIO;
3388 }
3389
3390 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3391 {
3392         __be32 *p;
3393
3394         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3395         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3396                 return -EIO;
3397         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3398                 p = xdr_inline_decode(xdr, 4);
3399                 if (unlikely(!p))
3400                         goto out_overflow;
3401                 *res = be32_to_cpup(p);
3402                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3403         }
3404         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3405         return 0;
3406 out_overflow:
3407         print_overflow_msg(__func__, xdr);
3408         return -EIO;
3409 }
3410
3411 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3412 {
3413         __be32 *p;
3414         int ret = 0;
3415
3416         *fileid = 0;
3417         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3418                 return -EIO;
3419         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3420                 p = xdr_inline_decode(xdr, 8);
3421                 if (unlikely(!p))
3422                         goto out_overflow;
3423                 xdr_decode_hyper(p, fileid);
3424                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3425                 ret = NFS_ATTR_FATTR_FILEID;
3426         }
3427         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3428         return ret;
3429 out_overflow:
3430         print_overflow_msg(__func__, xdr);
3431         return -EIO;
3432 }
3433
3434 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3435 {
3436         __be32 *p;
3437         int ret = 0;
3438
3439         *fileid = 0;
3440         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3441                 return -EIO;
3442         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3443                 p = xdr_inline_decode(xdr, 8);
3444                 if (unlikely(!p))
3445                         goto out_overflow;
3446                 xdr_decode_hyper(p, fileid);
3447                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3448                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3449         }
3450         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3451         return ret;
3452 out_overflow:
3453         print_overflow_msg(__func__, xdr);
3454         return -EIO;
3455 }
3456
3457 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3458 {
3459         __be32 *p;
3460         int status = 0;
3461
3462         *res = 0;
3463         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3464                 return -EIO;
3465         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3466                 p = xdr_inline_decode(xdr, 8);
3467                 if (unlikely(!p))
3468                         goto out_overflow;
3469                 xdr_decode_hyper(p, res);
3470                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3471         }
3472         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3473         return status;
3474 out_overflow:
3475         print_overflow_msg(__func__, xdr);
3476         return -EIO;
3477 }
3478
3479 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3480 {
3481         __be32 *p;
3482         int status = 0;
3483
3484         *res = 0;
3485         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3486                 return -EIO;
3487         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3488                 p = xdr_inline_decode(xdr, 8);
3489                 if (unlikely(!p))
3490                         goto out_overflow;
3491                 xdr_decode_hyper(p, res);
3492                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3493         }
3494         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3495         return status;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503         __be32 *p;
3504         int status = 0;
3505
3506         *res = 0;
3507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3510                 p = xdr_inline_decode(xdr, 8);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 xdr_decode_hyper(p, res);
3514                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3515         }
3516         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3517         return status;
3518 out_overflow:
3519         print_overflow_msg(__func__, xdr);
3520         return -EIO;
3521 }
3522
3523 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3524 {
3525         u32 n;
3526         __be32 *p;
3527         int status = 0;
3528
3529         p = xdr_inline_decode(xdr, 4);
3530         if (unlikely(!p))
3531                 goto out_overflow;
3532         n = be32_to_cpup(p);
3533         if (n == 0)
3534                 goto root_path;
3535         dprintk("pathname4: ");
3536         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3537                 dprintk("cannot parse %d components in path\n", n);
3538                 goto out_eio;
3539         }
3540         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3541                 struct nfs4_string *component = &path->components[path->ncomponents];
3542                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3543                 if (unlikely(status != 0))
3544                         goto out_eio;
3545                 ifdebug (XDR)
3546                         pr_cont("%s%.*s ",
3547                                 (path->ncomponents != n ? "/ " : ""),
3548                                 component->len, component->data);
3549         }
3550 out:
3551         return status;
3552 root_path:
3553 /* a root pathname is sent as a zero component4 */
3554         path->ncomponents = 1;
3555         path->components[0].len=0;
3556         path->components[0].data=NULL;
3557         dprintk("pathname4: /\n");
3558         goto out;
3559 out_eio:
3560         dprintk(" status %d", status);
3561         status = -EIO;
3562         goto out;
3563 out_overflow:
3564         print_overflow_msg(__func__, xdr);
3565         return -EIO;
3566 }
3567
3568 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3569 {
3570         int n;
3571         __be32 *p;
3572         int status = -EIO;
3573
3574         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3575                 goto out;
3576         status = 0;
3577         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3578                 goto out;
3579         status = -EIO;
3580         /* Ignore borken servers that return unrequested attrs */
3581         if (unlikely(res == NULL))
3582                 goto out;
3583         dprintk("%s: fsroot:\n", __func__);
3584         status = decode_pathname(xdr, &res->fs_path);
3585         if (unlikely(status != 0))
3586                 goto out;
3587         p = xdr_inline_decode(xdr, 4);
3588         if (unlikely(!p))
3589                 goto out_overflow;
3590         n = be32_to_cpup(p);
3591         if (n <= 0)
3592                 goto out_eio;
3593         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3594                 u32 m;
3595                 struct nfs4_fs_location *loc;
3596
3597                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3598                         break;
3599                 loc = &res->locations[res->nlocations];
3600                 p = xdr_inline_decode(xdr, 4);
3601                 if (unlikely(!p))
3602                         goto out_overflow;
3603                 m = be32_to_cpup(p);
3604
3605                 dprintk("%s: servers:\n", __func__);
3606                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3607                         struct nfs4_string *server;
3608
3609                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3610                                 unsigned int i;
3611                                 dprintk("%s: using first %u of %u servers "
3612                                         "returned for location %u\n",
3613                                                 __func__,
3614                                                 NFS4_FS_LOCATION_MAXSERVERS,
3615                                                 m, res->nlocations);
3616                                 for (i = loc->nservers; i < m; i++) {
3617                                         unsigned int len;
3618                                         char *data;
3619                                         status = decode_opaque_inline(xdr, &len, &data);
3620                                         if (unlikely(status != 0))
3621                                                 goto out_eio;
3622                                 }
3623                                 break;
3624                         }
3625                         server = &loc->servers[loc->nservers];
3626                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3627                         if (unlikely(status != 0))
3628                                 goto out_eio;
3629                         dprintk("%s ", server->data);
3630                 }
3631                 status = decode_pathname(xdr, &loc->rootpath);
3632                 if (unlikely(status != 0))
3633                         goto out_eio;
3634         }
3635         if (res->nlocations != 0)
3636                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3637 out:
3638         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3639         return status;
3640 out_overflow:
3641         print_overflow_msg(__func__, xdr);
3642 out_eio:
3643         status = -EIO;
3644         goto out;
3645 }
3646
3647 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3648 {
3649         __be32 *p;
3650         int status = 0;
3651
3652         *res = 0;
3653         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3654                 return -EIO;
3655         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3656                 p = xdr_inline_decode(xdr, 8);
3657                 if (unlikely(!p))
3658                         goto out_overflow;
3659                 xdr_decode_hyper(p, res);
3660                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3661         }
3662         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3663         return status;
3664 out_overflow:
3665         print_overflow_msg(__func__, xdr);
3666         return -EIO;
3667 }
3668
3669 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3670 {
3671         __be32 *p;
3672         int status = 0;
3673
3674         *maxlink = 1;
3675         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3676                 return -EIO;
3677         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3678                 p = xdr_inline_decode(xdr, 4);
3679                 if (unlikely(!p))
3680                         goto out_overflow;
3681                 *maxlink = be32_to_cpup(p);
3682                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3683         }
3684         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3685         return status;
3686 out_overflow:
3687         print_overflow_msg(__func__, xdr);
3688         return -EIO;
3689 }
3690
3691 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3692 {
3693         __be32 *p;
3694         int status = 0;
3695
3696         *maxname = 1024;
3697         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3698                 return -EIO;
3699         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3700                 p = xdr_inline_decode(xdr, 4);
3701                 if (unlikely(!p))
3702                         goto out_overflow;
3703                 *maxname = be32_to_cpup(p);
3704                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3705         }
3706         dprintk("%s: maxname=%u\n", __func__, *maxname);
3707         return status;
3708 out_overflow:
3709         print_overflow_msg(__func__, xdr);
3710         return -EIO;
3711 }
3712
3713 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3714 {
3715         __be32 *p;
3716         int status = 0;
3717
3718         *res = 1024;
3719         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3720                 return -EIO;
3721         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3722                 uint64_t maxread;
3723                 p = xdr_inline_decode(xdr, 8);
3724                 if (unlikely(!p))
3725                         goto out_overflow;
3726                 xdr_decode_hyper(p, &maxread);
3727                 if (maxread > 0x7FFFFFFF)
3728                         maxread = 0x7FFFFFFF;
3729                 *res = (uint32_t)maxread;
3730                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3731         }
3732         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3733         return status;
3734 out_overflow:
3735         print_overflow_msg(__func__, xdr);
3736         return -EIO;
3737 }
3738
3739 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3740 {
3741         __be32 *p;
3742         int status = 0;
3743
3744         *res = 1024;
3745         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3746                 return -EIO;
3747         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3748                 uint64_t maxwrite;
3749                 p = xdr_inline_decode(xdr, 8);
3750                 if (unlikely(!p))
3751                         goto out_overflow;
3752                 xdr_decode_hyper(p, &maxwrite);
3753                 if (maxwrite > 0x7FFFFFFF)
3754                         maxwrite = 0x7FFFFFFF;
3755                 *res = (uint32_t)maxwrite;
3756                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3757         }
3758         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3759         return status;
3760 out_overflow:
3761         print_overflow_msg(__func__, xdr);
3762         return -EIO;
3763 }
3764
3765 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3766 {
3767         uint32_t tmp;
3768         __be32 *p;
3769         int ret = 0;
3770
3771         *mode = 0;
3772         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3773                 return -EIO;
3774         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3775                 p = xdr_inline_decode(xdr, 4);
3776                 if (unlikely(!p))
3777                         goto out_overflow;
3778                 tmp = be32_to_cpup(p);
3779                 *mode = tmp & ~S_IFMT;
3780                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3781                 ret = NFS_ATTR_FATTR_MODE;
3782         }
3783         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3784         return ret;
3785 out_overflow:
3786         print_overflow_msg(__func__, xdr);
3787         return -EIO;
3788 }
3789
3790 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3791 {
3792         __be32 *p;
3793         int ret = 0;
3794
3795         *nlink = 1;
3796         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3797                 return -EIO;
3798         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3799                 p = xdr_inline_decode(xdr, 4);
3800                 if (unlikely(!p))
3801                         goto out_overflow;
3802                 *nlink = be32_to_cpup(p);
3803                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3804                 ret = NFS_ATTR_FATTR_NLINK;
3805         }
3806         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3807         return ret;
3808 out_overflow:
3809         print_overflow_msg(__func__, xdr);
3810         return -EIO;
3811 }
3812
3813 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3814                 const struct nfs_server *server, kuid_t *uid,
3815                 struct nfs4_string *owner_name)
3816 {
3817         uint32_t len;
3818         __be32 *p;
3819         int ret = 0;
3820
3821         *uid = make_kuid(&init_user_ns, -2);
3822         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3823                 return -EIO;
3824         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3825                 p = xdr_inline_decode(xdr, 4);
3826                 if (unlikely(!p))
3827                         goto out_overflow;
3828                 len = be32_to_cpup(p);
3829                 p = xdr_inline_decode(xdr, len);
3830                 if (unlikely(!p))
3831                         goto out_overflow;
3832                 if (owner_name != NULL) {
3833                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3834                         if (owner_name->data != NULL) {
3835                                 owner_name->len = len;
3836                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3837                         }
3838                 } else if (len < XDR_MAX_NETOBJ) {
3839                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3840                                 ret = NFS_ATTR_FATTR_OWNER;
3841                         else
3842                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3843                                                 __func__);
3844                 } else
3845                         dprintk("%s: name too long (%u)!\n",
3846                                         __func__, len);
3847                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3848         }
3849         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3850         return ret;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855
3856 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3857                 const struct nfs_server *server, kgid_t *gid,
3858                 struct nfs4_string *group_name)
3859 {
3860         uint32_t len;
3861         __be32 *p;
3862         int ret = 0;
3863
3864         *gid = make_kgid(&init_user_ns, -2);
3865         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3866                 return -EIO;
3867         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3868                 p = xdr_inline_decode(xdr, 4);
3869                 if (unlikely(!p))
3870                         goto out_overflow;
3871                 len = be32_to_cpup(p);
3872                 p = xdr_inline_decode(xdr, len);
3873                 if (unlikely(!p))
3874                         goto out_overflow;
3875                 if (group_name != NULL) {
3876                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3877                         if (group_name->data != NULL) {
3878                                 group_name->len = len;
3879                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3880                         }
3881                 } else if (len < XDR_MAX_NETOBJ) {
3882                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3883                                 ret = NFS_ATTR_FATTR_GROUP;
3884                         else
3885                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3886                                                 __func__);
3887                 } else
3888                         dprintk("%s: name too long (%u)!\n",
3889                                         __func__, len);
3890                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3891         }
3892         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3893         return ret;
3894 out_overflow:
3895         print_overflow_msg(__func__, xdr);
3896         return -EIO;
3897 }
3898
3899 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3900 {
3901         uint32_t major = 0, minor = 0;
3902         __be32 *p;
3903         int ret = 0;
3904
3905         *rdev = MKDEV(0,0);
3906         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3907                 return -EIO;
3908         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3909                 dev_t tmp;
3910
3911                 p = xdr_inline_decode(xdr, 8);
3912                 if (unlikely(!p))
3913                         goto out_overflow;
3914                 major = be32_to_cpup(p++);
3915                 minor = be32_to_cpup(p);
3916                 tmp = MKDEV(major, minor);
3917                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3918                         *rdev = tmp;
3919                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3920                 ret = NFS_ATTR_FATTR_RDEV;
3921         }
3922         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3923         return ret;
3924 out_overflow:
3925         print_overflow_msg(__func__, xdr);
3926         return -EIO;
3927 }
3928
3929 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3930 {
3931         __be32 *p;
3932         int status = 0;
3933
3934         *res = 0;
3935         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3936                 return -EIO;
3937         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3938                 p = xdr_inline_decode(xdr, 8);
3939                 if (unlikely(!p))
3940                         goto out_overflow;
3941                 xdr_decode_hyper(p, res);
3942                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3943         }
3944         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3945         return status;
3946 out_overflow:
3947         print_overflow_msg(__func__, xdr);
3948         return -EIO;
3949 }
3950
3951 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3952 {
3953         __be32 *p;
3954         int status = 0;
3955
3956         *res = 0;
3957         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3958                 return -EIO;
3959         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3960                 p = xdr_inline_decode(xdr, 8);
3961                 if (unlikely(!p))
3962                         goto out_overflow;
3963                 xdr_decode_hyper(p, res);
3964                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3965         }
3966         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3967         return status;
3968 out_overflow:
3969         print_overflow_msg(__func__, xdr);
3970         return -EIO;
3971 }
3972
3973 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975         __be32 *p;
3976         int status = 0;
3977
3978         *res = 0;
3979         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3980                 return -EIO;
3981         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3982                 p = xdr_inline_decode(xdr, 8);
3983                 if (unlikely(!p))
3984                         goto out_overflow;
3985                 xdr_decode_hyper(p, res);
3986                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3987         }
3988         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3989         return status;
3990 out_overflow:
3991         print_overflow_msg(__func__, xdr);
3992         return -EIO;
3993 }
3994
3995 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3996 {
3997         __be32 *p;
3998         int ret = 0;
3999
4000         *used = 0;
4001         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4002                 return -EIO;
4003         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4004                 p = xdr_inline_decode(xdr, 8);
4005                 if (unlikely(!p))
4006                         goto out_overflow;
4007                 xdr_decode_hyper(p, used);
4008                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4009                 ret = NFS_ATTR_FATTR_SPACE_USED;
4010         }
4011         dprintk("%s: space used=%Lu\n", __func__,
4012                         (unsigned long long)*used);
4013         return ret;
4014 out_overflow:
4015         print_overflow_msg(__func__, xdr);
4016         return -EIO;
4017 }
4018
4019 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4020 {
4021         __be32 *p;
4022         uint64_t sec;
4023         uint32_t nsec;
4024
4025         p = xdr_inline_decode(xdr, 12);
4026         if (unlikely(!p))
4027                 goto out_overflow;
4028         p = xdr_decode_hyper(p, &sec);
4029         nsec = be32_to_cpup(p);
4030         time->tv_sec = (time_t)sec;
4031         time->tv_nsec = (long)nsec;
4032         return 0;
4033 out_overflow:
4034         print_overflow_msg(__func__, xdr);
4035         return -EIO;
4036 }
4037
4038 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4039 {
4040         int status = 0;
4041
4042         time->tv_sec = 0;
4043         time->tv_nsec = 0;
4044         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4045                 return -EIO;
4046         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4047                 status = decode_attr_time(xdr, time);
4048                 if (status == 0)
4049                         status = NFS_ATTR_FATTR_ATIME;
4050                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4051         }
4052         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4053         return status;
4054 }
4055
4056 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4057 {
4058         int status = 0;
4059
4060         time->tv_sec = 0;
4061         time->tv_nsec = 0;
4062         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4063                 return -EIO;
4064         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4065                 status = decode_attr_time(xdr, time);
4066                 if (status == 0)
4067                         status = NFS_ATTR_FATTR_CTIME;
4068                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4069         }
4070         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4071         return status;
4072 }
4073
4074 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4075                                   struct timespec *time)
4076 {
4077         int status = 0;
4078
4079         time->tv_sec = 0;
4080         time->tv_nsec = 0;
4081         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4082                 return -EIO;
4083         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4084                 status = decode_attr_time(xdr, time);
4085                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4086         }
4087         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4088                 (long)time->tv_nsec);
4089         return status;
4090 }
4091
4092 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4093                                         struct nfs4_label *label)
4094 {
4095         uint32_t pi = 0;
4096         uint32_t lfs = 0;
4097         __u32 len;
4098         __be32 *p;
4099         int status = 0;
4100
4101         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4102                 return -EIO;
4103         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4104                 p = xdr_inline_decode(xdr, 4);
4105                 if (unlikely(!p))
4106                         goto out_overflow;
4107                 lfs = be32_to_cpup(p++);
4108                 p = xdr_inline_decode(xdr, 4);
4109                 if (unlikely(!p))
4110                         goto out_overflow;
4111                 pi = be32_to_cpup(p++);
4112                 p = xdr_inline_decode(xdr, 4);
4113                 if (unlikely(!p))
4114                         goto out_overflow;
4115                 len = be32_to_cpup(p++);
4116                 p = xdr_inline_decode(xdr, len);
4117                 if (unlikely(!p))
4118                         goto out_overflow;
4119                 if (len < NFS4_MAXLABELLEN) {
4120                         if (label) {
4121                                 memcpy(label->label, p, len);
4122                                 label->len = len;
4123                                 label->pi = pi;
4124                                 label->lfs = lfs;
4125                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4126                         }
4127                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4128                 } else
4129                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4130                                         __func__, len);
4131         }
4132         if (label && label->label)
4133                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4134                         (char *)label->label, label->len, label->pi, label->lfs);
4135         return status;
4136
4137 out_overflow:
4138         print_overflow_msg(__func__, xdr);
4139         return -EIO;
4140 }
4141
4142 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4143 {
4144         int status = 0;
4145
4146         time->tv_sec = 0;
4147         time->tv_nsec = 0;
4148         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4149                 return -EIO;
4150         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4151                 status = decode_attr_time(xdr, time);
4152                 if (status == 0)
4153                         status = NFS_ATTR_FATTR_MTIME;
4154                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4155         }
4156         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4157         return status;
4158 }
4159
4160 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4161 {
4162         unsigned int attrwords = XDR_QUADLEN(attrlen);
4163         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4164
4165         if (unlikely(attrwords != nwords)) {
4166                 dprintk("%s: server returned incorrect attribute length: "
4167                         "%u %c %u\n",
4168                                 __func__,
4169                                 attrwords << 2,
4170                                 (attrwords < nwords) ? '<' : '>',
4171                                 nwords << 2);
4172                 return -EIO;
4173         }
4174         return 0;
4175 }
4176
4177 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4178 {
4179         __be32 *p;
4180
4181         p = xdr_inline_decode(xdr, 20);
4182         if (unlikely(!p))
4183                 goto out_overflow;
4184         cinfo->atomic = be32_to_cpup(p++);
4185         p = xdr_decode_hyper(p, &cinfo->before);
4186         xdr_decode_hyper(p, &cinfo->after);
4187         return 0;
4188 out_overflow:
4189         print_overflow_msg(__func__, xdr);
4190         return -EIO;
4191 }
4192
4193 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4194 {
4195         __be32 *p;
4196         uint32_t supp, acc;
4197         int status;
4198
4199         status = decode_op_hdr(xdr, OP_ACCESS);
4200         if (status)
4201                 return status;
4202         p = xdr_inline_decode(xdr, 8);
4203         if (unlikely(!p))
4204                 goto out_overflow;
4205         supp = be32_to_cpup(p++);
4206         acc = be32_to_cpup(p);
4207         *supported = supp;
4208         *access = acc;
4209         return 0;
4210 out_overflow:
4211         print_overflow_msg(__func__, xdr);
4212         return -EIO;
4213 }
4214
4215 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4216 {
4217         __be32 *p;
4218
4219         p = xdr_inline_decode(xdr, len);
4220         if (likely(p)) {
4221                 memcpy(buf, p, len);
4222                 return 0;
4223         }
4224         print_overflow_msg(__func__, xdr);
4225         return -EIO;
4226 }
4227
4228 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4229 {
4230         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4231 }
4232
4233 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4234 {
4235         int status;
4236
4237         status = decode_op_hdr(xdr, OP_CLOSE);
4238         if (status != -EIO)
4239                 nfs_increment_open_seqid(status, res->seqid);
4240         if (!status)
4241                 status = decode_stateid(xdr, &res->stateid);
4242         return status;
4243 }
4244
4245 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4246 {
4247         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4248 }
4249
4250 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4251 {
4252         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4253 }
4254
4255 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4256 {
4257         int status;
4258
4259         status = decode_op_hdr(xdr, OP_COMMIT);
4260         if (!status)
4261                 status = decode_write_verifier(xdr, &res->verf->verifier);
4262         return status;
4263 }
4264
4265 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4266 {
4267         __be32 *p;
4268         uint32_t bmlen;
4269         int status;
4270
4271         status = decode_op_hdr(xdr, OP_CREATE);
4272         if (status)
4273                 return status;
4274         if ((status = decode_change_info(xdr, cinfo)))
4275                 return status;
4276         p = xdr_inline_decode(xdr, 4);
4277         if (unlikely(!p))
4278                 goto out_overflow;
4279         bmlen = be32_to_cpup(p);
4280         p = xdr_inline_decode(xdr, bmlen << 2);
4281         if (likely(p))
4282                 return 0;
4283 out_overflow:
4284         print_overflow_msg(__func__, xdr);
4285         return -EIO;
4286 }
4287
4288 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4289 {
4290         unsigned int savep;
4291         uint32_t attrlen, bitmap[3] = {0};
4292         int status;
4293
4294         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4295                 goto xdr_error;
4296         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4297                 goto xdr_error;
4298         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4299                 goto xdr_error;
4300         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4301                 goto xdr_error;
4302         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4303                                                  &res->fh_expire_type)) != 0)
4304                 goto xdr_error;
4305         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4306                 goto xdr_error;
4307         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4308                 goto xdr_error;
4309         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4310                 goto xdr_error;
4311         status = verify_attr_len(xdr, savep, attrlen);
4312 xdr_error:
4313         dprintk("%s: xdr returned %d!\n", __func__, -status);
4314         return status;
4315 }
4316
4317 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4318 {
4319         unsigned int savep;
4320         uint32_t attrlen, bitmap[3] = {0};
4321         int status;
4322
4323         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4324                 goto xdr_error;
4325         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4326                 goto xdr_error;
4327         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4328                 goto xdr_error;
4329
4330         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4331                 goto xdr_error;
4332         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4333                 goto xdr_error;
4334         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4335                 goto xdr_error;
4336         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4337                 goto xdr_error;
4338         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4339                 goto xdr_error;
4340         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4341                 goto xdr_error;
4342
4343         status = verify_attr_len(xdr, savep, attrlen);
4344 xdr_error:
4345         dprintk("%s: xdr returned %d!\n", __func__, -status);
4346         return status;
4347 }
4348
4349 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4350 {
4351         unsigned int savep;
4352         uint32_t attrlen, bitmap[3] = {0};
4353         int status;
4354
4355         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4356                 goto xdr_error;
4357         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4360                 goto xdr_error;
4361
4362         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4365                 goto xdr_error;
4366
4367         status = verify_attr_len(xdr, savep, attrlen);
4368 xdr_error:
4369         dprintk("%s: xdr returned %d!\n", __func__, -status);
4370         return status;
4371 }
4372
4373 static int decode_threshold_hint(struct xdr_stream *xdr,
4374                                   uint32_t *bitmap,
4375                                   uint64_t *res,
4376                                   uint32_t hint_bit)
4377 {
4378         __be32 *p;
4379
4380         *res = 0;
4381         if (likely(bitmap[0] & hint_bit)) {
4382                 p = xdr_inline_decode(xdr, 8);
4383                 if (unlikely(!p))
4384                         goto out_overflow;
4385                 xdr_decode_hyper(p, res);
4386         }
4387         return 0;
4388 out_overflow:
4389         print_overflow_msg(__func__, xdr);
4390         return -EIO;
4391 }
4392
4393 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4394                                         struct nfs4_threshold *res)
4395 {
4396         __be32 *p;
4397         unsigned int savep;
4398         uint32_t bitmap[3] = {0,}, attrlen;
4399         int status;
4400
4401         /* layout type */
4402         p = xdr_inline_decode(xdr, 4);
4403         if (unlikely(!p)) {
4404                 print_overflow_msg(__func__, xdr);
4405                 return -EIO;
4406         }
4407         res->l_type = be32_to_cpup(p);
4408
4409         /* thi_hintset bitmap */
4410         status = decode_attr_bitmap(xdr, bitmap);
4411         if (status < 0)
4412                 goto xdr_error;
4413
4414         /* thi_hintlist length */
4415         status = decode_attr_length(xdr, &attrlen, &savep);
4416         if (status < 0)
4417                 goto xdr_error;
4418         /* thi_hintlist */
4419         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4420         if (status < 0)
4421                 goto xdr_error;
4422         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4423         if (status < 0)
4424                 goto xdr_error;
4425         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4426                                        THRESHOLD_RD_IO);
4427         if (status < 0)
4428                 goto xdr_error;
4429         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4430                                        THRESHOLD_WR_IO);
4431         if (status < 0)
4432                 goto xdr_error;
4433
4434         status = verify_attr_len(xdr, savep, attrlen);
4435         res->bm = bitmap[0];
4436
4437         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4438                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4439                 res->wr_io_sz);
4440 xdr_error:
4441         dprintk("%s ret=%d!\n", __func__, status);
4442         return status;
4443 }
4444
4445 /*
4446  * Thresholds on pNFS direct I/O vrs MDS I/O
4447  */
4448 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4449                                     uint32_t *bitmap,
4450                                     struct nfs4_threshold *res)
4451 {
4452         __be32 *p;
4453         int status = 0;
4454         uint32_t num;
4455
4456         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4457                 return -EIO;
4458         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4459                 /* Did the server return an unrequested attribute? */
4460                 if (unlikely(res == NULL))
4461                         return -EREMOTEIO;
4462                 p = xdr_inline_decode(xdr, 4);
4463                 if (unlikely(!p))
4464                         goto out_overflow;
4465                 num = be32_to_cpup(p);
4466                 if (num == 0)
4467                         return 0;
4468                 if (num > 1)
4469                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4470                                 "drivers per filesystem not supported\n",
4471                                 __func__);
4472
4473                 status = decode_first_threshold_item4(xdr, res);
4474                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4475         }
4476         return status;
4477 out_overflow:
4478         print_overflow_msg(__func__, xdr);
4479         return -EIO;
4480 }
4481
4482 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4483                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4484                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4485                 const struct nfs_server *server)
4486 {
4487         int status;
4488         umode_t fmode = 0;
4489         uint32_t type;
4490         int32_t err;
4491
4492         status = decode_attr_type(xdr, bitmap, &type);
4493         if (status < 0)
4494                 goto xdr_error;
4495         fattr->mode = 0;
4496         if (status != 0) {
4497                 fattr->mode |= nfs_type2fmt[type];
4498                 fattr->valid |= status;
4499         }
4500
4501         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4502         if (status < 0)
4503                 goto xdr_error;
4504         fattr->valid |= status;
4505
4506         status = decode_attr_size(xdr, bitmap, &fattr->size);
4507         if (status < 0)
4508                 goto xdr_error;
4509         fattr->valid |= status;
4510
4511         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4512         if (status < 0)
4513                 goto xdr_error;
4514         fattr->valid |= status;
4515
4516         err = 0;
4517         status = decode_attr_error(xdr, bitmap, &err);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         status = decode_attr_filehandle(xdr, bitmap, fh);
4522         if (status < 0)
4523                 goto xdr_error;
4524
4525         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4526         if (status < 0)
4527                 goto xdr_error;
4528         fattr->valid |= status;
4529
4530         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4531         if (status < 0)
4532                 goto xdr_error;
4533         fattr->valid |= status;
4534
4535         status = decode_attr_mode(xdr, bitmap, &fmode);
4536         if (status < 0)
4537                 goto xdr_error;
4538         if (status != 0) {
4539                 fattr->mode |= fmode;
4540                 fattr->valid |= status;
4541         }
4542
4543         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4544         if (status < 0)
4545                 goto xdr_error;
4546         fattr->valid |= status;
4547
4548         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4549         if (status < 0)
4550                 goto xdr_error;
4551         fattr->valid |= status;
4552
4553         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4554         if (status < 0)
4555                 goto xdr_error;
4556         fattr->valid |= status;
4557
4558         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4559         if (status < 0)
4560                 goto xdr_error;
4561         fattr->valid |= status;
4562
4563         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4579         if (status < 0)
4580                 goto xdr_error;
4581         fattr->valid |= status;
4582
4583         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4584         if (status < 0)
4585                 goto xdr_error;
4586         fattr->valid |= status;
4587
4588         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4589         if (status < 0)
4590                 goto xdr_error;
4591
4592         if (label) {
4593                 status = decode_attr_security_label(xdr, bitmap, label);
4594                 if (status < 0)
4595                         goto xdr_error;
4596                 fattr->valid |= status;
4597         }
4598
4599 xdr_error:
4600         dprintk("%s: xdr returned %d\n", __func__, -status);
4601         return status;
4602 }
4603
4604 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4605                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4606                 struct nfs4_label *label, const struct nfs_server *server)
4607 {
4608         unsigned int savep;
4609         uint32_t attrlen,
4610                  bitmap[3] = {0};
4611         int status;
4612
4613         status = decode_op_hdr(xdr, OP_GETATTR);
4614         if (status < 0)
4615                 goto xdr_error;
4616
4617         status = decode_attr_bitmap(xdr, bitmap);
4618         if (status < 0)
4619                 goto xdr_error;
4620
4621         status = decode_attr_length(xdr, &attrlen, &savep);
4622         if (status < 0)
4623                 goto xdr_error;
4624
4625         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4626                                         label, server);
4627         if (status < 0)
4628                 goto xdr_error;
4629
4630         status = verify_attr_len(xdr, savep, attrlen);
4631 xdr_error:
4632         dprintk("%s: xdr returned %d\n", __func__, -status);
4633         return status;
4634 }
4635
4636 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4637                 struct nfs4_label *label, const struct nfs_server *server)
4638 {
4639         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4640 }
4641
4642 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4643                 const struct nfs_server *server)
4644 {
4645         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4646 }
4647
4648 /*
4649  * Decode potentially multiple layout types. Currently we only support
4650  * one layout driver per file system.
4651  */
4652 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4653                                          uint32_t *layouttype)
4654 {
4655         __be32 *p;
4656         int num;
4657
4658         p = xdr_inline_decode(xdr, 4);
4659         if (unlikely(!p))
4660                 goto out_overflow;
4661         num = be32_to_cpup(p);
4662
4663         /* pNFS is not supported by the underlying file system */
4664         if (num == 0) {
4665                 *layouttype = 0;
4666                 return 0;
4667         }
4668         if (num > 1)
4669                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4670                         "drivers per filesystem not supported\n", __func__);
4671
4672         /* Decode and set first layout type, move xdr->p past unused types */
4673         p = xdr_inline_decode(xdr, num * 4);
4674         if (unlikely(!p))
4675                 goto out_overflow;
4676         *layouttype = be32_to_cpup(p);
4677         return 0;
4678 out_overflow:
4679         print_overflow_msg(__func__, xdr);
4680         return -EIO;
4681 }
4682
4683 /*
4684  * The type of file system exported.
4685  * Note we must ensure that layouttype is set in any non-error case.
4686  */
4687 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4688                                 uint32_t *layouttype)
4689 {
4690         int status = 0;
4691
4692         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4693         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4694                 return -EIO;
4695         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4696                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4697                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4698         } else
4699                 *layouttype = 0;
4700         return status;
4701 }
4702
4703 /*
4704  * The prefered block size for layout directed io
4705  */
4706 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4707                                       uint32_t *res)
4708 {
4709         __be32 *p;
4710
4711         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4712         *res = 0;
4713         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4714                 p = xdr_inline_decode(xdr, 4);
4715                 if (unlikely(!p)) {
4716                         print_overflow_msg(__func__, xdr);
4717                         return -EIO;
4718                 }
4719                 *res = be32_to_cpup(p);
4720                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4721         }
4722         return 0;
4723 }
4724
4725 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4726 {
4727         unsigned int savep;
4728         uint32_t attrlen, bitmap[3];
4729         int status;
4730
4731         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4732                 goto xdr_error;
4733         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4734                 goto xdr_error;
4735         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4736                 goto xdr_error;
4737
4738         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4739
4740         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4741                 goto xdr_error;
4742         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4743                 goto xdr_error;
4744         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4745                 goto xdr_error;
4746         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4747         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4748                 goto xdr_error;
4749         fsinfo->wtpref = fsinfo->wtmax;
4750         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4751         if (status != 0)
4752                 goto xdr_error;
4753         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4754         if (status != 0)
4755                 goto xdr_error;
4756         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4757         if (status)
4758                 goto xdr_error;
4759
4760         status = verify_attr_len(xdr, savep, attrlen);
4761 xdr_error:
4762         dprintk("%s: xdr returned %d!\n", __func__, -status);
4763         return status;
4764 }
4765
4766 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4767 {
4768         __be32 *p;
4769         uint32_t len;
4770         int status;
4771
4772         /* Zero handle first to allow comparisons */
4773         memset(fh, 0, sizeof(*fh));
4774
4775         status = decode_op_hdr(xdr, OP_GETFH);
4776         if (status)
4777                 return status;
4778
4779         p = xdr_inline_decode(xdr, 4);
4780         if (unlikely(!p))
4781                 goto out_overflow;
4782         len = be32_to_cpup(p);
4783         if (len > NFS4_FHSIZE)
4784                 return -EIO;
4785         fh->size = len;
4786         p = xdr_inline_decode(xdr, len);
4787         if (unlikely(!p))
4788                 goto out_overflow;
4789         memcpy(fh->data, p, len);
4790         return 0;
4791 out_overflow:
4792         print_overflow_msg(__func__, xdr);
4793         return -EIO;
4794 }
4795
4796 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4797 {
4798         int status;
4799
4800         status = decode_op_hdr(xdr, OP_LINK);
4801         if (status)
4802                 return status;
4803         return decode_change_info(xdr, cinfo);
4804 }
4805
4806 /*
4807  * We create the owner, so we know a proper owner.id length is 4.
4808  */
4809 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4810 {
4811         uint64_t offset, length, clientid;
4812         __be32 *p;
4813         uint32_t namelen, type;
4814
4815         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4816         if (unlikely(!p))
4817                 goto out_overflow;
4818         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4819         p = xdr_decode_hyper(p, &length);
4820         type = be32_to_cpup(p++); /* 4 byte read */
4821         if (fl != NULL) { /* manipulate file lock */
4822                 fl->fl_start = (loff_t)offset;
4823                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4824                 if (length == ~(uint64_t)0)
4825                         fl->fl_end = OFFSET_MAX;
4826                 fl->fl_type = F_WRLCK;
4827                 if (type & 1)
4828                         fl->fl_type = F_RDLCK;
4829                 fl->fl_pid = 0;
4830         }
4831         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4832         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4833         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4834         if (likely(p))
4835                 return -NFS4ERR_DENIED;
4836 out_overflow:
4837         print_overflow_msg(__func__, xdr);
4838         return -EIO;
4839 }
4840
4841 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4842 {
4843         int status;
4844
4845         status = decode_op_hdr(xdr, OP_LOCK);
4846         if (status == -EIO)
4847                 goto out;
4848         if (status == 0) {
4849                 status = decode_stateid(xdr, &res->stateid);
4850                 if (unlikely(status))
4851                         goto out;
4852         } else if (status == -NFS4ERR_DENIED)
4853                 status = decode_lock_denied(xdr, NULL);
4854         if (res->open_seqid != NULL)
4855                 nfs_increment_open_seqid(status, res->open_seqid);
4856         nfs_increment_lock_seqid(status, res->lock_seqid);
4857 out:
4858         return status;
4859 }
4860
4861 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4862 {
4863         int status;
4864         status = decode_op_hdr(xdr, OP_LOCKT);
4865         if (status == -NFS4ERR_DENIED)
4866                 return decode_lock_denied(xdr, res->denied);
4867         return status;
4868 }
4869
4870 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4871 {
4872         int status;
4873
4874         status = decode_op_hdr(xdr, OP_LOCKU);
4875         if (status != -EIO)
4876                 nfs_increment_lock_seqid(status, res->seqid);
4877         if (status == 0)
4878                 status = decode_stateid(xdr, &res->stateid);
4879         return status;
4880 }
4881
4882 static int decode_release_lockowner(struct xdr_stream *xdr)
4883 {
4884         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4885 }
4886
4887 static int decode_lookup(struct xdr_stream *xdr)
4888 {
4889         return decode_op_hdr(xdr, OP_LOOKUP);
4890 }
4891
4892 /* This is too sick! */
4893 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4894 {
4895         __be32 *p;
4896         uint32_t limit_type, nblocks, blocksize;
4897
4898         p = xdr_inline_decode(xdr, 12);
4899         if (unlikely(!p))
4900                 goto out_overflow;
4901         limit_type = be32_to_cpup(p++);
4902         switch (limit_type) {
4903         case 1:
4904                 xdr_decode_hyper(p, maxsize);
4905                 break;
4906         case 2:
4907                 nblocks = be32_to_cpup(p++);
4908                 blocksize = be32_to_cpup(p);
4909                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4910         }
4911         return 0;
4912 out_overflow:
4913         print_overflow_msg(__func__, xdr);
4914         return -EIO;
4915 }
4916
4917 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4918 {
4919         __be32 *p;
4920         uint32_t delegation_type;
4921         int status;
4922
4923         p = xdr_inline_decode(xdr, 4);
4924         if (unlikely(!p))
4925                 goto out_overflow;
4926         delegation_type = be32_to_cpup(p);
4927         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4928                 res->delegation_type = 0;
4929                 return 0;
4930         }
4931         status = decode_stateid(xdr, &res->delegation);
4932         if (unlikely(status))
4933                 return status;
4934         p = xdr_inline_decode(xdr, 4);
4935         if (unlikely(!p))
4936                 goto out_overflow;
4937         res->do_recall = be32_to_cpup(p);
4938
4939         switch (delegation_type) {
4940         case NFS4_OPEN_DELEGATE_READ:
4941                 res->delegation_type = FMODE_READ;
4942                 break;
4943         case NFS4_OPEN_DELEGATE_WRITE:
4944                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4945                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4946                                 return -EIO;
4947         }
4948         return decode_ace(xdr, NULL, res->server->nfs_client);
4949 out_overflow:
4950         print_overflow_msg(__func__, xdr);
4951         return -EIO;
4952 }
4953
4954 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4955 {
4956         __be32 *p;
4957         uint32_t savewords, bmlen, i;
4958         int status;
4959
4960         status = decode_op_hdr(xdr, OP_OPEN);
4961         if (status != -EIO)
4962                 nfs_increment_open_seqid(status, res->seqid);
4963         if (!status)
4964                 status = decode_stateid(xdr, &res->stateid);
4965         if (unlikely(status))
4966                 return status;
4967
4968         decode_change_info(xdr, &res->cinfo);
4969
4970         p = xdr_inline_decode(xdr, 8);
4971         if (unlikely(!p))
4972                 goto out_overflow;
4973         res->rflags = be32_to_cpup(p++);
4974         bmlen = be32_to_cpup(p);
4975         if (bmlen > 10)
4976                 goto xdr_error;
4977
4978         p = xdr_inline_decode(xdr, bmlen << 2);
4979         if (unlikely(!p))
4980                 goto out_overflow;
4981         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4982         for (i = 0; i < savewords; ++i)
4983                 res->attrset[i] = be32_to_cpup(p++);
4984         for (; i < NFS4_BITMAP_SIZE; i++)
4985                 res->attrset[i] = 0;
4986
4987         return decode_delegation(xdr, res);
4988 xdr_error:
4989         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4990         return -EIO;
4991 out_overflow:
4992         print_overflow_msg(__func__, xdr);
4993         return -EIO;
4994 }
4995
4996 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4997 {
4998         int status;
4999
5000         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5001         if (status != -EIO)
5002                 nfs_increment_open_seqid(status, res->seqid);
5003         if (!status)
5004                 status = decode_stateid(xdr, &res->stateid);
5005         return status;
5006 }
5007
5008 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5009 {
5010         int status;
5011
5012         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5013         if (status != -EIO)
5014                 nfs_increment_open_seqid(status, res->seqid);
5015         if (!status)
5016                 status = decode_stateid(xdr, &res->stateid);
5017         return status;
5018 }
5019
5020 static int decode_putfh(struct xdr_stream *xdr)
5021 {
5022         return decode_op_hdr(xdr, OP_PUTFH);
5023 }
5024
5025 static int decode_putrootfh(struct xdr_stream *xdr)
5026 {
5027         return decode_op_hdr(xdr, OP_PUTROOTFH);
5028 }
5029
5030 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5031 {
5032         __be32 *p;
5033         uint32_t count, eof, recvd;
5034         int status;
5035
5036         status = decode_op_hdr(xdr, OP_READ);
5037         if (status)
5038                 return status;
5039         p = xdr_inline_decode(xdr, 8);
5040         if (unlikely(!p))
5041                 goto out_overflow;
5042         eof = be32_to_cpup(p++);
5043         count = be32_to_cpup(p);
5044         recvd = xdr_read_pages(xdr, count);
5045         if (count > recvd) {
5046                 dprintk("NFS: server cheating in read reply: "
5047                                 "count %u > recvd %u\n", count, recvd);
5048                 count = recvd;
5049                 eof = 0;
5050         }
5051         res->eof = eof;
5052         res->count = count;
5053         return 0;
5054 out_overflow:
5055         print_overflow_msg(__func__, xdr);
5056         return -EIO;
5057 }
5058
5059 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5060 {
5061         int             status;
5062         __be32          verf[2];
5063
5064         status = decode_op_hdr(xdr, OP_READDIR);
5065         if (!status)
5066                 status = decode_verifier(xdr, readdir->verifier.data);
5067         if (unlikely(status))
5068                 return status;
5069         memcpy(verf, readdir->verifier.data, sizeof(verf));
5070         dprintk("%s: verifier = %08x:%08x\n",
5071                         __func__, verf[0], verf[1]);
5072         return xdr_read_pages(xdr, xdr->buf->page_len);
5073 }
5074
5075 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5076 {
5077         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5078         u32 len, recvd;
5079         __be32 *p;
5080         int status;
5081
5082         status = decode_op_hdr(xdr, OP_READLINK);
5083         if (status)
5084                 return status;
5085
5086         /* Convert length of symlink */
5087         p = xdr_inline_decode(xdr, 4);
5088         if (unlikely(!p))
5089                 goto out_overflow;
5090         len = be32_to_cpup(p);
5091         if (len >= rcvbuf->page_len || len <= 0) {
5092                 dprintk("nfs: server returned giant symlink!\n");
5093                 return -ENAMETOOLONG;
5094         }
5095         recvd = xdr_read_pages(xdr, len);
5096         if (recvd < len) {
5097                 dprintk("NFS: server cheating in readlink reply: "
5098                                 "count %u > recvd %u\n", len, recvd);
5099                 return -EIO;
5100         }
5101         /*
5102          * The XDR encode routine has set things up so that
5103          * the link text will be copied directly into the
5104          * buffer.  We just have to do overflow-checking,
5105          * and and null-terminate the text (the VFS expects
5106          * null-termination).
5107          */
5108         xdr_terminate_string(rcvbuf, len);
5109         return 0;
5110 out_overflow:
5111         print_overflow_msg(__func__, xdr);
5112         return -EIO;
5113 }
5114
5115 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5116 {
5117         int status;
5118
5119         status = decode_op_hdr(xdr, OP_REMOVE);
5120         if (status)
5121                 goto out;
5122         status = decode_change_info(xdr, cinfo);
5123 out:
5124         return status;
5125 }
5126
5127 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5128               struct nfs4_change_info *new_cinfo)
5129 {
5130         int status;
5131
5132         status = decode_op_hdr(xdr, OP_RENAME);
5133         if (status)
5134                 goto out;
5135         if ((status = decode_change_info(xdr, old_cinfo)))
5136                 goto out;
5137         status = decode_change_info(xdr, new_cinfo);
5138 out:
5139         return status;
5140 }
5141
5142 static int decode_renew(struct xdr_stream *xdr)
5143 {
5144         return decode_op_hdr(xdr, OP_RENEW);
5145 }
5146
5147 static int
5148 decode_restorefh(struct xdr_stream *xdr)
5149 {
5150         return decode_op_hdr(xdr, OP_RESTOREFH);
5151 }
5152
5153 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5154                          struct nfs_getaclres *res)
5155 {
5156         unsigned int savep;
5157         uint32_t attrlen,
5158                  bitmap[3] = {0};
5159         int status;
5160         unsigned int pg_offset;
5161
5162         res->acl_len = 0;
5163         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5164                 goto out;
5165
5166         xdr_enter_page(xdr, xdr->buf->page_len);
5167
5168         /* Calculate the offset of the page data */
5169         pg_offset = xdr->buf->head[0].iov_len;
5170
5171         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5172                 goto out;
5173         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5174                 goto out;
5175
5176         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5177                 return -EIO;
5178         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5179
5180                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5181                  * are stored with the acl data to handle the problem of
5182                  * variable length bitmaps.*/
5183                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5184                 res->acl_len = attrlen;
5185
5186                 /* Check for receive buffer overflow */
5187                 if (res->acl_len > (xdr->nwords << 2) ||
5188                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5189                         res->acl_flags |= NFS4_ACL_TRUNC;
5190                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5191                                         attrlen, xdr->nwords << 2);
5192                 }
5193         } else
5194                 status = -EOPNOTSUPP;
5195
5196 out:
5197         return status;
5198 }
5199
5200 static int
5201 decode_savefh(struct xdr_stream *xdr)
5202 {
5203         return decode_op_hdr(xdr, OP_SAVEFH);
5204 }
5205
5206 static int decode_setattr(struct xdr_stream *xdr)
5207 {
5208         __be32 *p;
5209         uint32_t bmlen;
5210         int status;
5211
5212         status = decode_op_hdr(xdr, OP_SETATTR);
5213         if (status)
5214                 return status;
5215         p = xdr_inline_decode(xdr, 4);
5216         if (unlikely(!p))
5217                 goto out_overflow;
5218         bmlen = be32_to_cpup(p);
5219         p = xdr_inline_decode(xdr, bmlen << 2);
5220         if (likely(p))
5221                 return 0;
5222 out_overflow:
5223         print_overflow_msg(__func__, xdr);
5224         return -EIO;
5225 }
5226
5227 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5228 {
5229         __be32 *p;
5230         uint32_t opnum;
5231         int32_t nfserr;
5232
5233         p = xdr_inline_decode(xdr, 8);
5234         if (unlikely(!p))
5235                 goto out_overflow;
5236         opnum = be32_to_cpup(p++);
5237         if (opnum != OP_SETCLIENTID) {
5238                 dprintk("nfs: decode_setclientid: Server returned operation"
5239                         " %d\n", opnum);
5240                 return -EIO;
5241         }
5242         nfserr = be32_to_cpup(p);
5243         if (nfserr == NFS_OK) {
5244                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5245                 if (unlikely(!p))
5246                         goto out_overflow;
5247                 p = xdr_decode_hyper(p, &res->clientid);
5248                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5249         } else if (nfserr == NFSERR_CLID_INUSE) {
5250                 uint32_t len;
5251
5252                 /* skip netid string */
5253                 p = xdr_inline_decode(xdr, 4);
5254                 if (unlikely(!p))
5255                         goto out_overflow;
5256                 len = be32_to_cpup(p);
5257                 p = xdr_inline_decode(xdr, len);
5258                 if (unlikely(!p))
5259                         goto out_overflow;
5260
5261                 /* skip uaddr string */
5262                 p = xdr_inline_decode(xdr, 4);
5263                 if (unlikely(!p))
5264                         goto out_overflow;
5265                 len = be32_to_cpup(p);
5266                 p = xdr_inline_decode(xdr, len);
5267                 if (unlikely(!p))
5268                         goto out_overflow;
5269                 return -NFSERR_CLID_INUSE;
5270         } else
5271                 return nfs4_stat_to_errno(nfserr);
5272
5273         return 0;
5274 out_overflow:
5275         print_overflow_msg(__func__, xdr);
5276         return -EIO;
5277 }
5278
5279 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5280 {
5281         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5282 }
5283
5284 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5285 {
5286         __be32 *p;
5287         int status;
5288
5289         status = decode_op_hdr(xdr, OP_WRITE);
5290         if (status)
5291                 return status;
5292
5293         p = xdr_inline_decode(xdr, 8);
5294         if (unlikely(!p))
5295                 goto out_overflow;
5296         res->count = be32_to_cpup(p++);
5297         res->verf->committed = be32_to_cpup(p++);
5298         return decode_write_verifier(xdr, &res->verf->verifier);
5299 out_overflow:
5300         print_overflow_msg(__func__, xdr);
5301         return -EIO;
5302 }
5303
5304 static int decode_delegreturn(struct xdr_stream *xdr)
5305 {
5306         return decode_op_hdr(xdr, OP_DELEGRETURN);
5307 }
5308
5309 static int decode_secinfo_gss(struct xdr_stream *xdr,
5310                               struct nfs4_secinfo4 *flavor)
5311 {
5312         u32 oid_len;
5313         __be32 *p;
5314
5315         p = xdr_inline_decode(xdr, 4);
5316         if (unlikely(!p))
5317                 goto out_overflow;
5318         oid_len = be32_to_cpup(p);
5319         if (oid_len > GSS_OID_MAX_LEN)
5320                 goto out_err;
5321
5322         p = xdr_inline_decode(xdr, oid_len);
5323         if (unlikely(!p))
5324                 goto out_overflow;
5325         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5326         flavor->flavor_info.oid.len = oid_len;
5327
5328         p = xdr_inline_decode(xdr, 8);
5329         if (unlikely(!p))
5330                 goto out_overflow;
5331         flavor->flavor_info.qop = be32_to_cpup(p++);
5332         flavor->flavor_info.service = be32_to_cpup(p);
5333
5334         return 0;
5335
5336 out_overflow:
5337         print_overflow_msg(__func__, xdr);
5338         return -EIO;
5339 out_err:
5340         return -EINVAL;
5341 }
5342
5343 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5344 {
5345         struct nfs4_secinfo4 *sec_flavor;
5346         unsigned int i, num_flavors;
5347         int status;
5348         __be32 *p;
5349
5350         p = xdr_inline_decode(xdr, 4);
5351         if (unlikely(!p))
5352                 goto out_overflow;
5353
5354         res->flavors->num_flavors = 0;
5355         num_flavors = be32_to_cpup(p);
5356
5357         for (i = 0; i < num_flavors; i++) {
5358                 sec_flavor = &res->flavors->flavors[i];
5359                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5360                         break;
5361
5362                 p = xdr_inline_decode(xdr, 4);
5363                 if (unlikely(!p))
5364                         goto out_overflow;
5365                 sec_flavor->flavor = be32_to_cpup(p);
5366
5367                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5368                         status = decode_secinfo_gss(xdr, sec_flavor);
5369                         if (status)
5370                                 goto out;
5371                 }
5372                 res->flavors->num_flavors++;
5373         }
5374
5375         status = 0;
5376 out:
5377         return status;
5378 out_overflow:
5379         print_overflow_msg(__func__, xdr);
5380         return -EIO;
5381 }
5382
5383 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5384 {
5385         int status = decode_op_hdr(xdr, OP_SECINFO);
5386         if (status)
5387                 return status;
5388         return decode_secinfo_common(xdr, res);
5389 }
5390
5391 #if defined(CONFIG_NFS_V4_1)
5392 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5393 {
5394         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5395         if (status)
5396                 return status;
5397         return decode_secinfo_common(xdr, res);
5398 }
5399
5400 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5401 {
5402         __be32 *p;
5403         uint32_t bitmap_words;
5404         unsigned int i;
5405
5406         p = xdr_inline_decode(xdr, 4);
5407         bitmap_words = be32_to_cpup(p++);
5408         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5409                 return -EIO;
5410         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5411         for (i = 0; i < bitmap_words; i++)
5412                 op_map->u.words[i] = be32_to_cpup(p++);
5413
5414         return 0;
5415 }
5416
5417 static int decode_exchange_id(struct xdr_stream *xdr,
5418                               struct nfs41_exchange_id_res *res)
5419 {
5420         __be32 *p;
5421         uint32_t dummy;
5422         char *dummy_str;
5423         int status;
5424         uint32_t impl_id_count;
5425
5426         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5427         if (status)
5428                 return status;
5429
5430         p = xdr_inline_decode(xdr, 8);
5431         if (unlikely(!p))
5432                 goto out_overflow;
5433         xdr_decode_hyper(p, &res->clientid);
5434         p = xdr_inline_decode(xdr, 12);
5435         if (unlikely(!p))
5436                 goto out_overflow;
5437         res->seqid = be32_to_cpup(p++);
5438         res->flags = be32_to_cpup(p++);
5439
5440         res->state_protect.how = be32_to_cpup(p);
5441         switch (res->state_protect.how) {
5442         case SP4_NONE:
5443                 break;
5444         case SP4_MACH_CRED:
5445                 status = decode_op_map(xdr, &res->state_protect.enforce);
5446                 if (status)
5447                         return status;
5448                 status = decode_op_map(xdr, &res->state_protect.allow);
5449                 if (status)
5450                         return status;
5451                 break;
5452         default:
5453                 WARN_ON_ONCE(1);
5454                 return -EIO;
5455         }
5456
5457         /* server_owner4.so_minor_id */
5458         p = xdr_inline_decode(xdr, 8);
5459         if (unlikely(!p))
5460                 goto out_overflow;
5461         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5462
5463         /* server_owner4.so_major_id */
5464         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5465         if (unlikely(status))
5466                 return status;
5467         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5468                 return -EIO;
5469         memcpy(res->server_owner->major_id, dummy_str, dummy);
5470         res->server_owner->major_id_sz = dummy;
5471
5472         /* server_scope4 */
5473         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5474         if (unlikely(status))
5475                 return status;
5476         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5477                 return -EIO;
5478         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5479         res->server_scope->server_scope_sz = dummy;
5480
5481         /* Implementation Id */
5482         p = xdr_inline_decode(xdr, 4);
5483         if (unlikely(!p))
5484                 goto out_overflow;
5485         impl_id_count = be32_to_cpup(p++);
5486
5487         if (impl_id_count) {
5488                 /* nii_domain */
5489                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5490                 if (unlikely(status))
5491                         return status;
5492                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5493                         return -EIO;
5494                 memcpy(res->impl_id->domain, dummy_str, dummy);
5495
5496                 /* nii_name */
5497                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5498                 if (unlikely(status))
5499                         return status;
5500                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5501                         return -EIO;
5502                 memcpy(res->impl_id->name, dummy_str, dummy);
5503
5504                 /* nii_date */
5505                 p = xdr_inline_decode(xdr, 12);
5506                 if (unlikely(!p))
5507                         goto out_overflow;
5508                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5509                 res->impl_id->date.nseconds = be32_to_cpup(p);
5510
5511                 /* if there's more than one entry, ignore the rest */
5512         }
5513         return 0;
5514 out_overflow:
5515         print_overflow_msg(__func__, xdr);
5516         return -EIO;
5517 }
5518
5519 static int decode_chan_attrs(struct xdr_stream *xdr,
5520                              struct nfs4_channel_attrs *attrs)
5521 {
5522         __be32 *p;
5523         u32 nr_attrs, val;
5524
5525         p = xdr_inline_decode(xdr, 28);
5526         if (unlikely(!p))
5527                 goto out_overflow;
5528         val = be32_to_cpup(p++);        /* headerpadsz */
5529         if (val)
5530                 return -EINVAL;         /* no support for header padding yet */
5531         attrs->max_rqst_sz = be32_to_cpup(p++);
5532         attrs->max_resp_sz = be32_to_cpup(p++);
5533         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5534         attrs->max_ops = be32_to_cpup(p++);
5535         attrs->max_reqs = be32_to_cpup(p++);
5536         nr_attrs = be32_to_cpup(p);
5537         if (unlikely(nr_attrs > 1)) {
5538                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5539                         "count %u\n", __func__, nr_attrs);
5540                 return -EINVAL;
5541         }
5542         if (nr_attrs == 1) {
5543                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5544                 if (unlikely(!p))
5545                         goto out_overflow;
5546         }
5547         return 0;
5548 out_overflow:
5549         print_overflow_msg(__func__, xdr);
5550         return -EIO;
5551 }
5552
5553 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5554 {
5555         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5556 }
5557
5558 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5559                                 struct nfs41_bind_conn_to_session_res *res)
5560 {
5561         __be32 *p;
5562         int status;
5563
5564         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5565         if (!status)
5566                 status = decode_sessionid(xdr, &res->session->sess_id);
5567         if (unlikely(status))
5568                 return status;
5569
5570         /* dir flags, rdma mode bool */
5571         p = xdr_inline_decode(xdr, 8);
5572         if (unlikely(!p))
5573                 goto out_overflow;
5574
5575         res->dir = be32_to_cpup(p++);
5576         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5577                 return -EIO;
5578         if (be32_to_cpup(p) == 0)
5579                 res->use_conn_in_rdma_mode = false;
5580         else
5581                 res->use_conn_in_rdma_mode = true;
5582
5583         return 0;
5584 out_overflow:
5585         print_overflow_msg(__func__, xdr);
5586         return -EIO;
5587 }
5588
5589 static int decode_create_session(struct xdr_stream *xdr,
5590                                  struct nfs41_create_session_res *res)
5591 {
5592         __be32 *p;
5593         int status;
5594         struct nfs_client *clp = res->client;
5595         struct nfs4_session *session = clp->cl_session;
5596
5597         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5598         if (!status)
5599                 status = decode_sessionid(xdr, &session->sess_id);
5600         if (unlikely(status))
5601                 return status;
5602
5603         /* seqid, flags */
5604         p = xdr_inline_decode(xdr, 8);
5605         if (unlikely(!p))
5606                 goto out_overflow;
5607         clp->cl_seqid = be32_to_cpup(p++);
5608         session->flags = be32_to_cpup(p);
5609
5610         /* Channel attributes */
5611         status = decode_chan_attrs(xdr, &session->fc_attrs);
5612         if (!status)
5613                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5614         return status;
5615 out_overflow:
5616         print_overflow_msg(__func__, xdr);
5617         return -EIO;
5618 }
5619
5620 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5621 {
5622         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5623 }
5624
5625 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5626 {
5627         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5628 }
5629
5630 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5631 {
5632         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5633 }
5634 #endif /* CONFIG_NFS_V4_1 */
5635
5636 static int decode_sequence(struct xdr_stream *xdr,
5637                            struct nfs4_sequence_res *res,
5638                            struct rpc_rqst *rqstp)
5639 {
5640 #if defined(CONFIG_NFS_V4_1)
5641         struct nfs4_session *session;
5642         struct nfs4_sessionid id;
5643         u32 dummy;
5644         int status;
5645         __be32 *p;
5646
5647         if (res->sr_slot == NULL)
5648                 return 0;
5649         if (!res->sr_slot->table->session)
5650                 return 0;
5651
5652         status = decode_op_hdr(xdr, OP_SEQUENCE);
5653         if (!status)
5654                 status = decode_sessionid(xdr, &id);
5655         if (unlikely(status))
5656                 goto out_err;
5657
5658         /*
5659          * If the server returns different values for sessionID, slotID or
5660          * sequence number, the server is looney tunes.
5661          */
5662         status = -EREMOTEIO;
5663         session = res->sr_slot->table->session;
5664
5665         if (memcmp(id.data, session->sess_id.data,
5666                    NFS4_MAX_SESSIONID_LEN)) {
5667                 dprintk("%s Invalid session id\n", __func__);
5668                 goto out_err;
5669         }
5670
5671         p = xdr_inline_decode(xdr, 20);
5672         if (unlikely(!p))
5673                 goto out_overflow;
5674
5675         /* seqid */
5676         dummy = be32_to_cpup(p++);
5677         if (dummy != res->sr_slot->seq_nr) {
5678                 dprintk("%s Invalid sequence number\n", __func__);
5679                 goto out_err;
5680         }
5681         /* slot id */
5682         dummy = be32_to_cpup(p++);
5683         if (dummy != res->sr_slot->slot_nr) {
5684                 dprintk("%s Invalid slot id\n", __func__);
5685                 goto out_err;
5686         }
5687         /* highest slot id */
5688         res->sr_highest_slotid = be32_to_cpup(p++);
5689         /* target highest slot id */
5690         res->sr_target_highest_slotid = be32_to_cpup(p++);
5691         /* result flags */
5692         res->sr_status_flags = be32_to_cpup(p);
5693         status = 0;
5694 out_err:
5695         res->sr_status = status;
5696         return status;
5697 out_overflow:
5698         print_overflow_msg(__func__, xdr);
5699         status = -EIO;
5700         goto out_err;
5701 #else  /* CONFIG_NFS_V4_1 */
5702         return 0;
5703 #endif /* CONFIG_NFS_V4_1 */
5704 }
5705
5706 #if defined(CONFIG_NFS_V4_1)
5707 /*
5708  * TODO: Need to handle case when EOF != true;
5709  */
5710 static int decode_getdevicelist(struct xdr_stream *xdr,
5711                                 struct pnfs_devicelist *res)
5712 {
5713         __be32 *p;
5714         int status, i;
5715         nfs4_verifier verftemp;
5716
5717         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5718         if (status)
5719                 return status;
5720
5721         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5722         if (unlikely(!p))
5723                 goto out_overflow;
5724
5725         /* TODO: Skip cookie for now */
5726         p += 2;
5727
5728         /* Read verifier */
5729         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5730
5731         res->num_devs = be32_to_cpup(p);
5732
5733         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5734
5735         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5736                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5737                                 __func__, res->num_devs);
5738                 return -EIO;
5739         }
5740
5741         p = xdr_inline_decode(xdr,
5742                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5743         if (unlikely(!p))
5744                 goto out_overflow;
5745         for (i = 0; i < res->num_devs; i++)
5746                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5747                                             NFS4_DEVICEID4_SIZE);
5748         res->eof = be32_to_cpup(p);
5749         return 0;
5750 out_overflow:
5751         print_overflow_msg(__func__, xdr);
5752         return -EIO;
5753 }
5754
5755 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5756                                 struct pnfs_device *pdev)
5757 {
5758         __be32 *p;
5759         uint32_t len, type;
5760         int status;
5761
5762         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5763         if (status) {
5764                 if (status == -ETOOSMALL) {
5765                         p = xdr_inline_decode(xdr, 4);
5766                         if (unlikely(!p))
5767                                 goto out_overflow;
5768                         pdev->mincount = be32_to_cpup(p);
5769                         dprintk("%s: Min count too small. mincnt = %u\n",
5770                                 __func__, pdev->mincount);
5771                 }
5772                 return status;
5773         }
5774
5775         p = xdr_inline_decode(xdr, 8);
5776         if (unlikely(!p))
5777                 goto out_overflow;
5778         type = be32_to_cpup(p++);
5779         if (type != pdev->layout_type) {
5780                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5781                         __func__, pdev->layout_type, type);
5782                 return -EINVAL;
5783         }
5784         /*
5785          * Get the length of the opaque device_addr4. xdr_read_pages places
5786          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5787          * and places the remaining xdr data in xdr_buf->tail
5788          */
5789         pdev->mincount = be32_to_cpup(p);
5790         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5791                 goto out_overflow;
5792
5793         /* Parse notification bitmap, verifying that it is zero. */
5794         p = xdr_inline_decode(xdr, 4);
5795         if (unlikely(!p))
5796                 goto out_overflow;
5797         len = be32_to_cpup(p);
5798         if (len) {
5799                 uint32_t i;
5800
5801                 p = xdr_inline_decode(xdr, 4 * len);
5802                 if (unlikely(!p))
5803                         goto out_overflow;
5804                 for (i = 0; i < len; i++, p++) {
5805                         if (be32_to_cpup(p)) {
5806                                 dprintk("%s: notifications not supported\n",
5807                                         __func__);
5808                                 return -EIO;
5809                         }
5810                 }
5811         }
5812         return 0;
5813 out_overflow:
5814         print_overflow_msg(__func__, xdr);
5815         return -EIO;
5816 }
5817
5818 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5819                             struct nfs4_layoutget_res *res)
5820 {
5821         __be32 *p;
5822         int status;
5823         u32 layout_count;
5824         u32 recvd;
5825
5826         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5827         if (status)
5828                 return status;
5829         p = xdr_inline_decode(xdr, 4);
5830         if (unlikely(!p))
5831                 goto out_overflow;
5832         res->return_on_close = be32_to_cpup(p);
5833         decode_stateid(xdr, &res->stateid);
5834         p = xdr_inline_decode(xdr, 4);
5835         if (unlikely(!p))
5836                 goto out_overflow;
5837         layout_count = be32_to_cpup(p);
5838         if (!layout_count) {
5839                 dprintk("%s: server responded with empty layout array\n",
5840                         __func__);
5841                 return -EINVAL;
5842         }
5843
5844         p = xdr_inline_decode(xdr, 28);
5845         if (unlikely(!p))
5846                 goto out_overflow;
5847         p = xdr_decode_hyper(p, &res->range.offset);
5848         p = xdr_decode_hyper(p, &res->range.length);
5849         res->range.iomode = be32_to_cpup(p++);
5850         res->type = be32_to_cpup(p++);
5851         res->layoutp->len = be32_to_cpup(p);
5852
5853         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5854                 __func__,
5855                 (unsigned long)res->range.offset,
5856                 (unsigned long)res->range.length,
5857                 res->range.iomode,
5858                 res->type,
5859                 res->layoutp->len);
5860
5861         recvd = xdr_read_pages(xdr, res->layoutp->len);
5862         if (res->layoutp->len > recvd) {
5863                 dprintk("NFS: server cheating in layoutget reply: "
5864                                 "layout len %u > recvd %u\n",
5865                                 res->layoutp->len, recvd);
5866                 return -EINVAL;
5867         }
5868
5869         if (layout_count > 1) {
5870                 /* We only handle a length one array at the moment.  Any
5871                  * further entries are just ignored.  Note that this means
5872                  * the client may see a response that is less than the
5873                  * minimum it requested.
5874                  */
5875                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5876                         __func__, layout_count);
5877         }
5878
5879         return 0;
5880 out_overflow:
5881         print_overflow_msg(__func__, xdr);
5882         return -EIO;
5883 }
5884
5885 static int decode_layoutreturn(struct xdr_stream *xdr,
5886                                struct nfs4_layoutreturn_res *res)
5887 {
5888         __be32 *p;
5889         int status;
5890
5891         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5892         if (status)
5893                 return status;
5894         p = xdr_inline_decode(xdr, 4);
5895         if (unlikely(!p))
5896                 goto out_overflow;
5897         res->lrs_present = be32_to_cpup(p);
5898         if (res->lrs_present)
5899                 status = decode_stateid(xdr, &res->stateid);
5900         return status;
5901 out_overflow:
5902         print_overflow_msg(__func__, xdr);
5903         return -EIO;
5904 }
5905
5906 static int decode_layoutcommit(struct xdr_stream *xdr,
5907                                struct rpc_rqst *req,
5908                                struct nfs4_layoutcommit_res *res)
5909 {
5910         __be32 *p;
5911         __u32 sizechanged;
5912         int status;
5913
5914         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5915         res->status = status;
5916         if (status)
5917                 return status;
5918
5919         p = xdr_inline_decode(xdr, 4);
5920         if (unlikely(!p))
5921                 goto out_overflow;
5922         sizechanged = be32_to_cpup(p);
5923
5924         if (sizechanged) {
5925                 /* throw away new size */
5926                 p = xdr_inline_decode(xdr, 8);
5927                 if (unlikely(!p))
5928                         goto out_overflow;
5929         }
5930         return 0;
5931 out_overflow:
5932         print_overflow_msg(__func__, xdr);
5933         return -EIO;
5934 }
5935
5936 static int decode_test_stateid(struct xdr_stream *xdr,
5937                                struct nfs41_test_stateid_res *res)
5938 {
5939         __be32 *p;
5940         int status;
5941         int num_res;
5942
5943         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5944         if (status)
5945                 return status;
5946
5947         p = xdr_inline_decode(xdr, 4);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         num_res = be32_to_cpup(p++);
5951         if (num_res != 1)
5952                 goto out;
5953
5954         p = xdr_inline_decode(xdr, 4);
5955         if (unlikely(!p))
5956                 goto out_overflow;
5957         res->status = be32_to_cpup(p++);
5958
5959         return status;
5960 out_overflow:
5961         print_overflow_msg(__func__, xdr);
5962 out:
5963         return -EIO;
5964 }
5965
5966 static int decode_free_stateid(struct xdr_stream *xdr,
5967                                struct nfs41_free_stateid_res *res)
5968 {
5969         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5970         return res->status;
5971 }
5972 #endif /* CONFIG_NFS_V4_1 */
5973
5974 /*
5975  * END OF "GENERIC" DECODE ROUTINES.
5976  */
5977
5978 /*
5979  * Decode OPEN_DOWNGRADE response
5980  */
5981 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5982                                        struct xdr_stream *xdr,
5983                                        struct nfs_closeres *res)
5984 {
5985         struct compound_hdr hdr;
5986         int status;
5987
5988         status = decode_compound_hdr(xdr, &hdr);
5989         if (status)
5990                 goto out;
5991         status = decode_sequence(xdr, &res->seq_res, rqstp);
5992         if (status)
5993                 goto out;
5994         status = decode_putfh(xdr);
5995         if (status)
5996                 goto out;
5997         status = decode_open_downgrade(xdr, res);
5998         if (status != 0)
5999                 goto out;
6000         decode_getfattr(xdr, res->fattr, res->server);
6001 out:
6002         return status;
6003 }
6004
6005 /*
6006  * Decode ACCESS response
6007  */
6008 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009                                struct nfs4_accessres *res)
6010 {
6011         struct compound_hdr hdr;
6012         int status;
6013
6014         status = decode_compound_hdr(xdr, &hdr);
6015         if (status)
6016                 goto out;
6017         status = decode_sequence(xdr, &res->seq_res, rqstp);
6018         if (status)
6019                 goto out;
6020         status = decode_putfh(xdr);
6021         if (status != 0)
6022                 goto out;
6023         status = decode_access(xdr, &res->supported, &res->access);
6024         if (status != 0)
6025                 goto out;
6026         decode_getfattr(xdr, res->fattr, res->server);
6027 out:
6028         return status;
6029 }
6030
6031 /*
6032  * Decode LOOKUP response
6033  */
6034 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6035                                struct nfs4_lookup_res *res)
6036 {
6037         struct compound_hdr hdr;
6038         int status;
6039
6040         status = decode_compound_hdr(xdr, &hdr);
6041         if (status)
6042                 goto out;
6043         status = decode_sequence(xdr, &res->seq_res, rqstp);
6044         if (status)
6045                 goto out;
6046         status = decode_putfh(xdr);
6047         if (status)
6048                 goto out;
6049         status = decode_lookup(xdr);
6050         if (status)
6051                 goto out;
6052         status = decode_getfh(xdr, res->fh);
6053         if (status)
6054                 goto out;
6055         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6056 out:
6057         return status;
6058 }
6059
6060 /*
6061  * Decode LOOKUP_ROOT response
6062  */
6063 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6064                                     struct xdr_stream *xdr,
6065                                     struct nfs4_lookup_res *res)
6066 {
6067         struct compound_hdr hdr;
6068         int status;
6069
6070         status = decode_compound_hdr(xdr, &hdr);
6071         if (status)
6072                 goto out;
6073         status = decode_sequence(xdr, &res->seq_res, rqstp);
6074         if (status)
6075                 goto out;
6076         status = decode_putrootfh(xdr);
6077         if (status)
6078                 goto out;
6079         status = decode_getfh(xdr, res->fh);
6080         if (status == 0)
6081                 status = decode_getfattr_label(xdr, res->fattr,
6082                                                 res->label, res->server);
6083 out:
6084         return status;
6085 }
6086
6087 /*
6088  * Decode REMOVE response
6089  */
6090 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6091                                struct nfs_removeres *res)
6092 {
6093         struct compound_hdr hdr;
6094         int status;
6095
6096         status = decode_compound_hdr(xdr, &hdr);
6097         if (status)
6098                 goto out;
6099         status = decode_sequence(xdr, &res->seq_res, rqstp);
6100         if (status)
6101                 goto out;
6102         status = decode_putfh(xdr);
6103         if (status)
6104                 goto out;
6105         status = decode_remove(xdr, &res->cinfo);
6106 out:
6107         return status;
6108 }
6109
6110 /*
6111  * Decode RENAME response
6112  */
6113 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6114                                struct nfs_renameres *res)
6115 {
6116         struct compound_hdr hdr;
6117         int status;
6118
6119         status = decode_compound_hdr(xdr, &hdr);
6120         if (status)
6121                 goto out;
6122         status = decode_sequence(xdr, &res->seq_res, rqstp);
6123         if (status)
6124                 goto out;
6125         status = decode_putfh(xdr);
6126         if (status)
6127                 goto out;
6128         status = decode_savefh(xdr);
6129         if (status)
6130                 goto out;
6131         status = decode_putfh(xdr);
6132         if (status)
6133                 goto out;
6134         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6135 out:
6136         return status;
6137 }
6138
6139 /*
6140  * Decode LINK response
6141  */
6142 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6143                              struct nfs4_link_res *res)
6144 {
6145         struct compound_hdr hdr;
6146         int status;
6147
6148         status = decode_compound_hdr(xdr, &hdr);
6149         if (status)
6150                 goto out;
6151         status = decode_sequence(xdr, &res->seq_res, rqstp);
6152         if (status)
6153                 goto out;
6154         status = decode_putfh(xdr);
6155         if (status)
6156                 goto out;
6157         status = decode_savefh(xdr);
6158         if (status)
6159                 goto out;
6160         status = decode_putfh(xdr);
6161         if (status)
6162                 goto out;
6163         status = decode_link(xdr, &res->cinfo);
6164         if (status)
6165                 goto out;
6166         /*
6167          * Note order: OP_LINK leaves the directory as the current
6168          *             filehandle.
6169          */
6170         status = decode_restorefh(xdr);
6171         if (status)
6172                 goto out;
6173         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6174 out:
6175         return status;
6176 }
6177
6178 /*
6179  * Decode CREATE response
6180  */
6181 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6182                                struct nfs4_create_res *res)
6183 {
6184         struct compound_hdr hdr;
6185         int status;
6186
6187         status = decode_compound_hdr(xdr, &hdr);
6188         if (status)
6189                 goto out;
6190         status = decode_sequence(xdr, &res->seq_res, rqstp);
6191         if (status)
6192                 goto out;
6193         status = decode_putfh(xdr);
6194         if (status)
6195                 goto out;
6196         status = decode_create(xdr, &res->dir_cinfo);
6197         if (status)
6198                 goto out;
6199         status = decode_getfh(xdr, res->fh);
6200         if (status)
6201                 goto out;
6202         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6203 out:
6204         return status;
6205 }
6206
6207 /*
6208  * Decode SYMLINK response
6209  */
6210 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6211                                 struct nfs4_create_res *res)
6212 {
6213         return nfs4_xdr_dec_create(rqstp, xdr, res);
6214 }
6215
6216 /*
6217  * Decode GETATTR response
6218  */
6219 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6220                                 struct nfs4_getattr_res *res)
6221 {
6222         struct compound_hdr hdr;
6223         int status;
6224
6225         status = decode_compound_hdr(xdr, &hdr);
6226         if (status)
6227                 goto out;
6228         status = decode_sequence(xdr, &res->seq_res, rqstp);
6229         if (status)
6230                 goto out;
6231         status = decode_putfh(xdr);
6232         if (status)
6233                 goto out;
6234         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6235 out:
6236         return status;
6237 }
6238
6239 /*
6240  * Encode an SETACL request
6241  */
6242 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6243                                 struct nfs_setaclargs *args)
6244 {
6245         struct compound_hdr hdr = {
6246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6247         };
6248
6249         encode_compound_hdr(xdr, req, &hdr);
6250         encode_sequence(xdr, &args->seq_args, &hdr);
6251         encode_putfh(xdr, args->fh, &hdr);
6252         encode_setacl(xdr, args, &hdr);
6253         encode_nops(&hdr);
6254 }
6255
6256 /*
6257  * Decode SETACL response
6258  */
6259 static int
6260 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261                     struct nfs_setaclres *res)
6262 {
6263         struct compound_hdr hdr;
6264         int status;
6265
6266         status = decode_compound_hdr(xdr, &hdr);
6267         if (status)
6268                 goto out;
6269         status = decode_sequence(xdr, &res->seq_res, rqstp);
6270         if (status)
6271                 goto out;
6272         status = decode_putfh(xdr);
6273         if (status)
6274                 goto out;
6275         status = decode_setattr(xdr);
6276 out:
6277         return status;
6278 }
6279
6280 /*
6281  * Decode GETACL response
6282  */
6283 static int
6284 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285                     struct nfs_getaclres *res)
6286 {
6287         struct compound_hdr hdr;
6288         int status;
6289
6290         if (res->acl_scratch != NULL) {
6291                 void *p = page_address(res->acl_scratch);
6292                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6293         }
6294         status = decode_compound_hdr(xdr, &hdr);
6295         if (status)
6296                 goto out;
6297         status = decode_sequence(xdr, &res->seq_res, rqstp);
6298         if (status)
6299                 goto out;
6300         status = decode_putfh(xdr);
6301         if (status)
6302                 goto out;
6303         status = decode_getacl(xdr, rqstp, res);
6304
6305 out:
6306         return status;
6307 }
6308
6309 /*
6310  * Decode CLOSE response
6311  */
6312 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6313                               struct nfs_closeres *res)
6314 {
6315         struct compound_hdr hdr;
6316         int status;
6317
6318         status = decode_compound_hdr(xdr, &hdr);
6319         if (status)
6320                 goto out;
6321         status = decode_sequence(xdr, &res->seq_res, rqstp);
6322         if (status)
6323                 goto out;
6324         status = decode_putfh(xdr);
6325         if (status)
6326                 goto out;
6327         status = decode_close(xdr, res);
6328         if (status != 0)
6329                 goto out;
6330         /*
6331          * Note: Server may do delete on close for this file
6332          *      in which case the getattr call will fail with
6333          *      an ESTALE error. Shouldn't be a problem,
6334          *      though, since fattr->valid will remain unset.
6335          */
6336         decode_getfattr(xdr, res->fattr, res->server);
6337 out:
6338         return status;
6339 }
6340
6341 /*
6342  * Decode OPEN response
6343  */
6344 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6345                              struct nfs_openres *res)
6346 {
6347         struct compound_hdr hdr;
6348         int status;
6349
6350         status = decode_compound_hdr(xdr, &hdr);
6351         if (status)
6352                 goto out;
6353         status = decode_sequence(xdr, &res->seq_res, rqstp);
6354         if (status)
6355                 goto out;
6356         status = decode_putfh(xdr);
6357         if (status)
6358                 goto out;
6359         status = decode_open(xdr, res);
6360         if (status)
6361                 goto out;
6362         status = decode_getfh(xdr, &res->fh);
6363         if (status)
6364                 goto out;
6365         if (res->access_request)
6366                 decode_access(xdr, &res->access_supported, &res->access_result);
6367         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode OPEN_CONFIRM response
6374  */
6375 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6376                                      struct xdr_stream *xdr,
6377                                      struct nfs_open_confirmres *res)
6378 {
6379         struct compound_hdr hdr;
6380         int status;
6381
6382         status = decode_compound_hdr(xdr, &hdr);
6383         if (status)
6384                 goto out;
6385         status = decode_putfh(xdr);
6386         if (status)
6387                 goto out;
6388         status = decode_open_confirm(xdr, res);
6389 out:
6390         return status;
6391 }
6392
6393 /*
6394  * Decode OPEN response
6395  */
6396 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6397                                     struct xdr_stream *xdr,
6398                                     struct nfs_openres *res)
6399 {
6400         struct compound_hdr hdr;
6401         int status;
6402
6403         status = decode_compound_hdr(xdr, &hdr);
6404         if (status)
6405                 goto out;
6406         status = decode_sequence(xdr, &res->seq_res, rqstp);
6407         if (status)
6408                 goto out;
6409         status = decode_putfh(xdr);
6410         if (status)
6411                 goto out;
6412         status = decode_open(xdr, res);
6413         if (status)
6414                 goto out;
6415         if (res->access_request)
6416                 decode_access(xdr, &res->access_supported, &res->access_result);
6417         decode_getfattr(xdr, res->f_attr, res->server);
6418 out:
6419         return status;
6420 }
6421
6422 /*
6423  * Decode SETATTR response
6424  */
6425 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6426                                 struct xdr_stream *xdr,
6427                                 struct nfs_setattrres *res)
6428 {
6429         struct compound_hdr hdr;
6430         int status;
6431
6432         status = decode_compound_hdr(xdr, &hdr);
6433         if (status)
6434                 goto out;
6435         status = decode_sequence(xdr, &res->seq_res, rqstp);
6436         if (status)
6437                 goto out;
6438         status = decode_putfh(xdr);
6439         if (status)
6440                 goto out;
6441         status = decode_setattr(xdr);
6442         if (status)
6443                 goto out;
6444         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6445 out:
6446         return status;
6447 }
6448
6449 /*
6450  * Decode LOCK response
6451  */
6452 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6453                              struct nfs_lock_res *res)
6454 {
6455         struct compound_hdr hdr;
6456         int status;
6457
6458         status = decode_compound_hdr(xdr, &hdr);
6459         if (status)
6460                 goto out;
6461         status = decode_sequence(xdr, &res->seq_res, rqstp);
6462         if (status)
6463                 goto out;
6464         status = decode_putfh(xdr);
6465         if (status)
6466                 goto out;
6467         status = decode_lock(xdr, res);
6468 out:
6469         return status;
6470 }
6471
6472 /*
6473  * Decode LOCKT response
6474  */
6475 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6476                               struct nfs_lockt_res *res)
6477 {
6478         struct compound_hdr hdr;
6479         int status;
6480
6481         status = decode_compound_hdr(xdr, &hdr);
6482         if (status)
6483                 goto out;
6484         status = decode_sequence(xdr, &res->seq_res, rqstp);
6485         if (status)
6486                 goto out;
6487         status = decode_putfh(xdr);
6488         if (status)
6489                 goto out;
6490         status = decode_lockt(xdr, res);
6491 out:
6492         return status;
6493 }
6494
6495 /*
6496  * Decode LOCKU response
6497  */
6498 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6499                               struct nfs_locku_res *res)
6500 {
6501         struct compound_hdr hdr;
6502         int status;
6503
6504         status = decode_compound_hdr(xdr, &hdr);
6505         if (status)
6506                 goto out;
6507         status = decode_sequence(xdr, &res->seq_res, rqstp);
6508         if (status)
6509                 goto out;
6510         status = decode_putfh(xdr);
6511         if (status)
6512                 goto out;
6513         status = decode_locku(xdr, res);
6514 out:
6515         return status;
6516 }
6517
6518 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6519                                           struct xdr_stream *xdr, void *dummy)
6520 {
6521         struct compound_hdr hdr;
6522         int status;
6523
6524         status = decode_compound_hdr(xdr, &hdr);
6525         if (!status)
6526                 status = decode_release_lockowner(xdr);
6527         return status;
6528 }
6529
6530 /*
6531  * Decode READLINK response
6532  */
6533 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6534                                  struct xdr_stream *xdr,
6535                                  struct nfs4_readlink_res *res)
6536 {
6537         struct compound_hdr hdr;
6538         int status;
6539
6540         status = decode_compound_hdr(xdr, &hdr);
6541         if (status)
6542                 goto out;
6543         status = decode_sequence(xdr, &res->seq_res, rqstp);
6544         if (status)
6545                 goto out;
6546         status = decode_putfh(xdr);
6547         if (status)
6548                 goto out;
6549         status = decode_readlink(xdr, rqstp);
6550 out:
6551         return status;
6552 }
6553
6554 /*
6555  * Decode READDIR response
6556  */
6557 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6558                                 struct nfs4_readdir_res *res)
6559 {
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_readdir(xdr, rqstp, res);
6573 out:
6574         return status;
6575 }
6576
6577 /*
6578  * Decode Read response
6579  */
6580 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6581                              struct nfs_readres *res)
6582 {
6583         struct compound_hdr hdr;
6584         int status;
6585
6586         status = decode_compound_hdr(xdr, &hdr);
6587         if (status)
6588                 goto out;
6589         status = decode_sequence(xdr, &res->seq_res, rqstp);
6590         if (status)
6591                 goto out;
6592         status = decode_putfh(xdr);
6593         if (status)
6594                 goto out;
6595         status = decode_read(xdr, rqstp, res);
6596         if (!status)
6597                 status = res->count;
6598 out:
6599         return status;
6600 }
6601
6602 /*
6603  * Decode WRITE response
6604  */
6605 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6606                               struct nfs_writeres *res)
6607 {
6608         struct compound_hdr hdr;
6609         int status;
6610
6611         status = decode_compound_hdr(xdr, &hdr);
6612         if (status)
6613                 goto out;
6614         status = decode_sequence(xdr, &res->seq_res, rqstp);
6615         if (status)
6616                 goto out;
6617         status = decode_putfh(xdr);
6618         if (status)
6619                 goto out;
6620         status = decode_write(xdr, res);
6621         if (status)
6622                 goto out;
6623         if (res->fattr)
6624                 decode_getfattr(xdr, res->fattr, res->server);
6625         if (!status)
6626                 status = res->count;
6627 out:
6628         return status;
6629 }
6630
6631 /*
6632  * Decode COMMIT response
6633  */
6634 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6635                                struct nfs_commitres *res)
6636 {
6637         struct compound_hdr hdr;
6638         int status;
6639
6640         status = decode_compound_hdr(xdr, &hdr);
6641         if (status)
6642                 goto out;
6643         status = decode_sequence(xdr, &res->seq_res, rqstp);
6644         if (status)
6645                 goto out;
6646         status = decode_putfh(xdr);
6647         if (status)
6648                 goto out;
6649         status = decode_commit(xdr, res);
6650 out:
6651         return status;
6652 }
6653
6654 /*
6655  * Decode FSINFO response
6656  */
6657 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6658                                struct nfs4_fsinfo_res *res)
6659 {
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (!status)
6665                 status = decode_sequence(xdr, &res->seq_res, req);
6666         if (!status)
6667                 status = decode_putfh(xdr);
6668         if (!status)
6669                 status = decode_fsinfo(xdr, res->fsinfo);
6670         return status;
6671 }
6672
6673 /*
6674  * Decode PATHCONF response
6675  */
6676 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6677                                  struct nfs4_pathconf_res *res)
6678 {
6679         struct compound_hdr hdr;
6680         int status;
6681
6682         status = decode_compound_hdr(xdr, &hdr);
6683         if (!status)
6684                 status = decode_sequence(xdr, &res->seq_res, req);
6685         if (!status)
6686                 status = decode_putfh(xdr);
6687         if (!status)
6688                 status = decode_pathconf(xdr, res->pathconf);
6689         return status;
6690 }
6691
6692 /*
6693  * Decode STATFS response
6694  */
6695 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6696                                struct nfs4_statfs_res *res)
6697 {
6698         struct compound_hdr hdr;
6699         int status;
6700
6701         status = decode_compound_hdr(xdr, &hdr);
6702         if (!status)
6703                 status = decode_sequence(xdr, &res->seq_res, req);
6704         if (!status)
6705                 status = decode_putfh(xdr);
6706         if (!status)
6707                 status = decode_statfs(xdr, res->fsstat);
6708         return status;
6709 }
6710
6711 /*
6712  * Decode GETATTR_BITMAP response
6713  */
6714 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6715                                     struct xdr_stream *xdr,
6716                                     struct nfs4_server_caps_res *res)
6717 {
6718         struct compound_hdr hdr;
6719         int status;
6720
6721         status = decode_compound_hdr(xdr, &hdr);
6722         if (status)
6723                 goto out;
6724         status = decode_sequence(xdr, &res->seq_res, req);
6725         if (status)
6726                 goto out;
6727         status = decode_putfh(xdr);
6728         if (status)
6729                 goto out;
6730         status = decode_server_caps(xdr, res);
6731 out:
6732         return status;
6733 }
6734
6735 /*
6736  * Decode RENEW response
6737  */
6738 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6739                               void *__unused)
6740 {
6741         struct compound_hdr hdr;
6742         int status;
6743
6744         status = decode_compound_hdr(xdr, &hdr);
6745         if (!status)
6746                 status = decode_renew(xdr);
6747         return status;
6748 }
6749
6750 /*
6751  * Decode SETCLIENTID response
6752  */
6753 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6754                                     struct xdr_stream *xdr,
6755                                     struct nfs4_setclientid_res *res)
6756 {
6757         struct compound_hdr hdr;
6758         int status;
6759
6760         status = decode_compound_hdr(xdr, &hdr);
6761         if (!status)
6762                 status = decode_setclientid(xdr, res);
6763         return status;
6764 }
6765
6766 /*
6767  * Decode SETCLIENTID_CONFIRM response
6768  */
6769 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6770                                             struct xdr_stream *xdr)
6771 {
6772         struct compound_hdr hdr;
6773         int status;
6774
6775         status = decode_compound_hdr(xdr, &hdr);
6776         if (!status)
6777                 status = decode_setclientid_confirm(xdr);
6778         return status;
6779 }
6780
6781 /*
6782  * Decode DELEGRETURN response
6783  */
6784 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6785                                     struct xdr_stream *xdr,
6786                                     struct nfs4_delegreturnres *res)
6787 {
6788         struct compound_hdr hdr;
6789         int status;
6790
6791         status = decode_compound_hdr(xdr, &hdr);
6792         if (status)
6793                 goto out;
6794         status = decode_sequence(xdr, &res->seq_res, rqstp);
6795         if (status)
6796                 goto out;
6797         status = decode_putfh(xdr);
6798         if (status != 0)
6799                 goto out;
6800         status = decode_getfattr(xdr, res->fattr, res->server);
6801         if (status != 0)
6802                 goto out;
6803         status = decode_delegreturn(xdr);
6804 out:
6805         return status;
6806 }
6807
6808 /*
6809  * Decode FS_LOCATIONS response
6810  */
6811 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6812                                      struct xdr_stream *xdr,
6813                                      struct nfs4_fs_locations_res *res)
6814 {
6815         struct compound_hdr hdr;
6816         int status;
6817
6818         status = decode_compound_hdr(xdr, &hdr);
6819         if (status)
6820                 goto out;
6821         status = decode_sequence(xdr, &res->seq_res, req);
6822         if (status)
6823                 goto out;
6824         status = decode_putfh(xdr);
6825         if (status)
6826                 goto out;
6827         status = decode_lookup(xdr);
6828         if (status)
6829                 goto out;
6830         xdr_enter_page(xdr, PAGE_SIZE);
6831         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6832                                          NULL, res->fs_locations,
6833                                          NULL, res->fs_locations->server);
6834 out:
6835         return status;
6836 }
6837
6838 /*
6839  * Decode SECINFO response
6840  */
6841 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6842                                 struct xdr_stream *xdr,
6843                                 struct nfs4_secinfo_res *res)
6844 {
6845         struct compound_hdr hdr;
6846         int status;
6847
6848         status = decode_compound_hdr(xdr, &hdr);
6849         if (status)
6850                 goto out;
6851         status = decode_sequence(xdr, &res->seq_res, rqstp);
6852         if (status)
6853                 goto out;
6854         status = decode_putfh(xdr);
6855         if (status)
6856                 goto out;
6857         status = decode_secinfo(xdr, res);
6858 out:
6859         return status;
6860 }
6861
6862 #if defined(CONFIG_NFS_V4_1)
6863 /*
6864  * Decode BIND_CONN_TO_SESSION response
6865  */
6866 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6867                                         struct xdr_stream *xdr,
6868                                         void *res)
6869 {
6870         struct compound_hdr hdr;
6871         int status;
6872
6873         status = decode_compound_hdr(xdr, &hdr);
6874         if (!status)
6875                 status = decode_bind_conn_to_session(xdr, res);
6876         return status;
6877 }
6878
6879 /*
6880  * Decode EXCHANGE_ID response
6881  */
6882 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6883                                     struct xdr_stream *xdr,
6884                                     void *res)
6885 {
6886         struct compound_hdr hdr;
6887         int status;
6888
6889         status = decode_compound_hdr(xdr, &hdr);
6890         if (!status)
6891                 status = decode_exchange_id(xdr, res);
6892         return status;
6893 }
6894
6895 /*
6896  * Decode CREATE_SESSION response
6897  */
6898 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6899                                        struct xdr_stream *xdr,
6900                                        struct nfs41_create_session_res *res)
6901 {
6902         struct compound_hdr hdr;
6903         int status;
6904
6905         status = decode_compound_hdr(xdr, &hdr);
6906         if (!status)
6907                 status = decode_create_session(xdr, res);
6908         return status;
6909 }
6910
6911 /*
6912  * Decode DESTROY_SESSION response
6913  */
6914 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6915                                         struct xdr_stream *xdr,
6916                                         void *res)
6917 {
6918         struct compound_hdr hdr;
6919         int status;
6920
6921         status = decode_compound_hdr(xdr, &hdr);
6922         if (!status)
6923                 status = decode_destroy_session(xdr, res);
6924         return status;
6925 }
6926
6927 /*
6928  * Decode DESTROY_CLIENTID response
6929  */
6930 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6931                                         struct xdr_stream *xdr,
6932                                         void *res)
6933 {
6934         struct compound_hdr hdr;
6935         int status;
6936
6937         status = decode_compound_hdr(xdr, &hdr);
6938         if (!status)
6939                 status = decode_destroy_clientid(xdr, res);
6940         return status;
6941 }
6942
6943 /*
6944  * Decode SEQUENCE response
6945  */
6946 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6947                                  struct xdr_stream *xdr,
6948                                  struct nfs4_sequence_res *res)
6949 {
6950         struct compound_hdr hdr;
6951         int status;
6952
6953         status = decode_compound_hdr(xdr, &hdr);
6954         if (!status)
6955                 status = decode_sequence(xdr, res, rqstp);
6956         return status;
6957 }
6958
6959 /*
6960  * Decode GET_LEASE_TIME response
6961  */
6962 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6963                                        struct xdr_stream *xdr,
6964                                        struct nfs4_get_lease_time_res *res)
6965 {
6966         struct compound_hdr hdr;
6967         int status;
6968
6969         status = decode_compound_hdr(xdr, &hdr);
6970         if (!status)
6971                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6972         if (!status)
6973                 status = decode_putrootfh(xdr);
6974         if (!status)
6975                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6976         return status;
6977 }
6978
6979 /*
6980  * Decode RECLAIM_COMPLETE response
6981  */
6982 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6983                                          struct xdr_stream *xdr,
6984                                          struct nfs41_reclaim_complete_res *res)
6985 {
6986         struct compound_hdr hdr;
6987         int status;
6988
6989         status = decode_compound_hdr(xdr, &hdr);
6990         if (!status)
6991                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6992         if (!status)
6993                 status = decode_reclaim_complete(xdr, (void *)NULL);
6994         return status;
6995 }
6996
6997 /*
6998  * Decode GETDEVICELIST response
6999  */
7000 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7001                                       struct xdr_stream *xdr,
7002                                       struct nfs4_getdevicelist_res *res)
7003 {
7004         struct compound_hdr hdr;
7005         int status;
7006
7007         dprintk("encoding getdevicelist!\n");
7008
7009         status = decode_compound_hdr(xdr, &hdr);
7010         if (status != 0)
7011                 goto out;
7012         status = decode_sequence(xdr, &res->seq_res, rqstp);
7013         if (status != 0)
7014                 goto out;
7015         status = decode_putfh(xdr);
7016         if (status != 0)
7017                 goto out;
7018         status = decode_getdevicelist(xdr, res->devlist);
7019 out:
7020         return status;
7021 }
7022
7023 /*
7024  * Decode GETDEVINFO response
7025  */
7026 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7027                                       struct xdr_stream *xdr,
7028                                       struct nfs4_getdeviceinfo_res *res)
7029 {
7030         struct compound_hdr hdr;
7031         int status;
7032
7033         status = decode_compound_hdr(xdr, &hdr);
7034         if (status != 0)
7035                 goto out;
7036         status = decode_sequence(xdr, &res->seq_res, rqstp);
7037         if (status != 0)
7038                 goto out;
7039         status = decode_getdeviceinfo(xdr, res->pdev);
7040 out:
7041         return status;
7042 }
7043
7044 /*
7045  * Decode LAYOUTGET response
7046  */
7047 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7048                                   struct xdr_stream *xdr,
7049                                   struct nfs4_layoutget_res *res)
7050 {
7051         struct compound_hdr hdr;
7052         int status;
7053
7054         status = decode_compound_hdr(xdr, &hdr);
7055         if (status)
7056                 goto out;
7057         status = decode_sequence(xdr, &res->seq_res, rqstp);
7058         if (status)
7059                 goto out;
7060         status = decode_putfh(xdr);
7061         if (status)
7062                 goto out;
7063         status = decode_layoutget(xdr, rqstp, res);
7064 out:
7065         return status;
7066 }
7067
7068 /*
7069  * Decode LAYOUTRETURN response
7070  */
7071 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7072                                      struct xdr_stream *xdr,
7073                                      struct nfs4_layoutreturn_res *res)
7074 {
7075         struct compound_hdr hdr;
7076         int status;
7077
7078         status = decode_compound_hdr(xdr, &hdr);
7079         if (status)
7080                 goto out;
7081         status = decode_sequence(xdr, &res->seq_res, rqstp);
7082         if (status)
7083                 goto out;
7084         status = decode_putfh(xdr);
7085         if (status)
7086                 goto out;
7087         status = decode_layoutreturn(xdr, res);
7088 out:
7089         return status;
7090 }
7091
7092 /*
7093  * Decode LAYOUTCOMMIT response
7094  */
7095 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7096                                      struct xdr_stream *xdr,
7097                                      struct nfs4_layoutcommit_res *res)
7098 {
7099         struct compound_hdr hdr;
7100         int status;
7101
7102         status = decode_compound_hdr(xdr, &hdr);
7103         if (status)
7104                 goto out;
7105         status = decode_sequence(xdr, &res->seq_res, rqstp);
7106         if (status)
7107                 goto out;
7108         status = decode_putfh(xdr);
7109         if (status)
7110                 goto out;
7111         status = decode_layoutcommit(xdr, rqstp, res);
7112         if (status)
7113                 goto out;
7114         decode_getfattr(xdr, res->fattr, res->server);
7115 out:
7116         return status;
7117 }
7118
7119 /*
7120  * Decode SECINFO_NO_NAME response
7121  */
7122 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7123                                         struct xdr_stream *xdr,
7124                                         struct nfs4_secinfo_res *res)
7125 {
7126         struct compound_hdr hdr;
7127         int status;
7128
7129         status = decode_compound_hdr(xdr, &hdr);
7130         if (status)
7131                 goto out;
7132         status = decode_sequence(xdr, &res->seq_res, rqstp);
7133         if (status)
7134                 goto out;
7135         status = decode_putrootfh(xdr);
7136         if (status)
7137                 goto out;
7138         status = decode_secinfo_no_name(xdr, res);
7139 out:
7140         return status;
7141 }
7142
7143 /*
7144  * Decode TEST_STATEID response
7145  */
7146 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7147                                      struct xdr_stream *xdr,
7148                                      struct nfs41_test_stateid_res *res)
7149 {
7150         struct compound_hdr hdr;
7151         int status;
7152
7153         status = decode_compound_hdr(xdr, &hdr);
7154         if (status)
7155                 goto out;
7156         status = decode_sequence(xdr, &res->seq_res, rqstp);
7157         if (status)
7158                 goto out;
7159         status = decode_test_stateid(xdr, res);
7160 out:
7161         return status;
7162 }
7163
7164 /*
7165  * Decode FREE_STATEID response
7166  */
7167 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7168                                      struct xdr_stream *xdr,
7169                                      struct nfs41_free_stateid_res *res)
7170 {
7171         struct compound_hdr hdr;
7172         int status;
7173
7174         status = decode_compound_hdr(xdr, &hdr);
7175         if (status)
7176                 goto out;
7177         status = decode_sequence(xdr, &res->seq_res, rqstp);
7178         if (status)
7179                 goto out;
7180         status = decode_free_stateid(xdr, res);
7181 out:
7182         return status;
7183 }
7184 #endif /* CONFIG_NFS_V4_1 */
7185
7186 /**
7187  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7188  *                      the local page cache.
7189  * @xdr: XDR stream where entry resides
7190  * @entry: buffer to fill in with entry data
7191  * @plus: boolean indicating whether this should be a readdirplus entry
7192  *
7193  * Returns zero if successful, otherwise a negative errno value is
7194  * returned.
7195  *
7196  * This function is not invoked during READDIR reply decoding, but
7197  * rather whenever an application invokes the getdents(2) system call
7198  * on a directory already in our cache.
7199  */
7200 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7201                        int plus)
7202 {
7203         unsigned int savep;
7204         uint32_t bitmap[3] = {0};
7205         uint32_t len;
7206         __be32 *p = xdr_inline_decode(xdr, 4);
7207         if (unlikely(!p))
7208                 goto out_overflow;
7209         if (*p == xdr_zero) {
7210                 p = xdr_inline_decode(xdr, 4);
7211                 if (unlikely(!p))
7212                         goto out_overflow;
7213                 if (*p == xdr_zero)
7214                         return -EAGAIN;
7215                 entry->eof = 1;
7216                 return -EBADCOOKIE;
7217         }
7218
7219         p = xdr_inline_decode(xdr, 12);
7220         if (unlikely(!p))
7221                 goto out_overflow;
7222         entry->prev_cookie = entry->cookie;
7223         p = xdr_decode_hyper(p, &entry->cookie);
7224         entry->len = be32_to_cpup(p);
7225
7226         p = xdr_inline_decode(xdr, entry->len);
7227         if (unlikely(!p))
7228                 goto out_overflow;
7229         entry->name = (const char *) p;
7230
7231         /*
7232          * In case the server doesn't return an inode number,
7233          * we fake one here.  (We don't use inode number 0,
7234          * since glibc seems to choke on it...)
7235          */
7236         entry->ino = 1;
7237         entry->fattr->valid = 0;
7238
7239         if (decode_attr_bitmap(xdr, bitmap) < 0)
7240                 goto out_overflow;
7241
7242         if (decode_attr_length(xdr, &len, &savep) < 0)
7243                 goto out_overflow;
7244
7245         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7246                         NULL, entry->label, entry->server) < 0)
7247                 goto out_overflow;
7248         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7249                 entry->ino = entry->fattr->mounted_on_fileid;
7250         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7251                 entry->ino = entry->fattr->fileid;
7252
7253         entry->d_type = DT_UNKNOWN;
7254         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7255                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7256
7257         return 0;
7258
7259 out_overflow:
7260         print_overflow_msg(__func__, xdr);
7261         return -EAGAIN;
7262 }
7263
7264 /*
7265  * We need to translate between nfs status return values and
7266  * the local errno values which may not be the same.
7267  */
7268 static struct {
7269         int stat;
7270         int errno;
7271 } nfs_errtbl[] = {
7272         { NFS4_OK,              0               },
7273         { NFS4ERR_PERM,         -EPERM          },
7274         { NFS4ERR_NOENT,        -ENOENT         },
7275         { NFS4ERR_IO,           -errno_NFSERR_IO},
7276         { NFS4ERR_NXIO,         -ENXIO          },
7277         { NFS4ERR_ACCESS,       -EACCES         },
7278         { NFS4ERR_EXIST,        -EEXIST         },
7279         { NFS4ERR_XDEV,         -EXDEV          },
7280         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7281         { NFS4ERR_ISDIR,        -EISDIR         },
7282         { NFS4ERR_INVAL,        -EINVAL         },
7283         { NFS4ERR_FBIG,         -EFBIG          },
7284         { NFS4ERR_NOSPC,        -ENOSPC         },
7285         { NFS4ERR_ROFS,         -EROFS          },
7286         { NFS4ERR_MLINK,        -EMLINK         },
7287         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7288         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7289         { NFS4ERR_DQUOT,        -EDQUOT         },
7290         { NFS4ERR_STALE,        -ESTALE         },
7291         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7292         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7293         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7294         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7295         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7296         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7297         { NFS4ERR_LOCKED,       -EAGAIN         },
7298         { NFS4ERR_SYMLINK,      -ELOOP          },
7299         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7300         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7301         { -1,                   -EIO            }
7302 };
7303
7304 /*
7305  * Convert an NFS error code to a local one.
7306  * This one is used jointly by NFSv2 and NFSv3.
7307  */
7308 static int
7309 nfs4_stat_to_errno(int stat)
7310 {
7311         int i;
7312         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7313                 if (nfs_errtbl[i].stat == stat)
7314                         return nfs_errtbl[i].errno;
7315         }
7316         if (stat <= 10000 || stat > 10100) {
7317                 /* The server is looney tunes. */
7318                 return -EREMOTEIO;
7319         }
7320         /* If we cannot translate the error, the recovery routines should
7321          * handle it.
7322          * Note: remaining NFSv4 error codes have values > 10000, so should
7323          * not conflict with native Linux error codes.
7324          */
7325         return -stat;
7326 }
7327
7328 #define PROC(proc, argtype, restype)                            \
7329 [NFSPROC4_CLNT_##proc] = {                                      \
7330         .p_proc   = NFSPROC4_COMPOUND,                          \
7331         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7332         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7333         .p_arglen = NFS4_##argtype##_sz,                        \
7334         .p_replen = NFS4_##restype##_sz,                        \
7335         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7336         .p_name   = #proc,                                      \
7337 }
7338
7339 struct rpc_procinfo     nfs4_procedures[] = {
7340         PROC(READ,              enc_read,               dec_read),
7341         PROC(WRITE,             enc_write,              dec_write),
7342         PROC(COMMIT,            enc_commit,             dec_commit),
7343         PROC(OPEN,              enc_open,               dec_open),
7344         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7345         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7346         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7347         PROC(CLOSE,             enc_close,              dec_close),
7348         PROC(SETATTR,           enc_setattr,            dec_setattr),
7349         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7350         PROC(RENEW,             enc_renew,              dec_renew),
7351         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7352         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7353         PROC(LOCK,              enc_lock,               dec_lock),
7354         PROC(LOCKT,             enc_lockt,              dec_lockt),
7355         PROC(LOCKU,             enc_locku,              dec_locku),
7356         PROC(ACCESS,            enc_access,             dec_access),
7357         PROC(GETATTR,           enc_getattr,            dec_getattr),
7358         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7359         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7360         PROC(REMOVE,            enc_remove,             dec_remove),
7361         PROC(RENAME,            enc_rename,             dec_rename),
7362         PROC(LINK,              enc_link,               dec_link),
7363         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7364         PROC(CREATE,            enc_create,             dec_create),
7365         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7366         PROC(STATFS,            enc_statfs,             dec_statfs),
7367         PROC(READLINK,          enc_readlink,           dec_readlink),
7368         PROC(READDIR,           enc_readdir,            dec_readdir),
7369         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7370         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7371         PROC(GETACL,            enc_getacl,             dec_getacl),
7372         PROC(SETACL,            enc_setacl,             dec_setacl),
7373         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7374         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7375         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7376 #if defined(CONFIG_NFS_V4_1)
7377         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7378         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7379         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7380         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7381         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7382         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7383         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7384         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7385         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7386         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7387         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7388         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7389         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7390         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7391         PROC(BIND_CONN_TO_SESSION,
7392                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7393         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7394 #endif /* CONFIG_NFS_V4_1 */
7395 };
7396
7397 const struct rpc_version nfs_version4 = {
7398         .number                 = 4,
7399         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7400         .procs                  = nfs4_procedures
7401 };
7402
7403 /*
7404  * Local variables:
7405  *  c-basic-offset: 8
7406  * End:
7407  */