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 /* We support only one layout type per file system */
 106 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 107 /* This is based on getfattr, which uses the most attributes: */
 108 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 109                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 110                                 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
 111 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 112                                 nfs4_fattr_value_maxsz)
 113 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 114 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 115                                  1 + 2 + 1 + \
 116                                 nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + \
 118                                 4 + 4)
 119 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 120 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 121 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 122 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 123 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 124 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 125  * layout types will be returned.
 126  */
 127 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 128                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 129 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 130 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 131 #define encode_setclientid_maxsz \
 132                                 (op_encode_hdr_maxsz + \
 133                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 134                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 135                                 1 /* sc_prog */ + \
 136                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 137                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 138                                 1) /* sc_cb_ident */
 139 #define decode_setclientid_maxsz \
 140                                 (op_decode_hdr_maxsz + \
 141                                 2 + \
 142                                 1024) /* large value for CLID_INUSE */
 143 #define encode_setclientid_confirm_maxsz \
 144                                 (op_encode_hdr_maxsz + \
 145                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 146 #define decode_setclientid_confirm_maxsz \
 147                                 (op_decode_hdr_maxsz)
 148 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 149 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 150 #define encode_share_access_maxsz \
 151                                 (2)
 152 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 153 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 154 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 155 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 156                                 2 + encode_share_access_maxsz + 2 + \
 157                                 open_owner_id_maxsz + \
 158                                 encode_opentype_maxsz + \
 159                                 encode_claim_null_maxsz)
 160 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 161 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 162                                 decode_ace_maxsz)
 163 #define decode_change_info_maxsz        (5)
 164 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 165                                 decode_stateid_maxsz + \
 166                                 decode_change_info_maxsz + 1 + \
 167                                 nfs4_fattr_bitmap_maxsz + \
 168                                 decode_delegation_maxsz)
 169 #define encode_open_confirm_maxsz \
 170                                 (op_encode_hdr_maxsz + \
 171                                  encode_stateid_maxsz + 1)
 172 #define decode_open_confirm_maxsz \
 173                                 (op_decode_hdr_maxsz + \
 174                                  decode_stateid_maxsz)
 175 #define encode_open_downgrade_maxsz \
 176                                 (op_encode_hdr_maxsz + \
 177                                  encode_stateid_maxsz + 1 + \
 178                                  encode_share_access_maxsz)
 179 #define decode_open_downgrade_maxsz \
 180                                 (op_decode_hdr_maxsz + \
 181                                  decode_stateid_maxsz)
 182 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 183                                  1 + encode_stateid_maxsz)
 184 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 185                                  decode_stateid_maxsz)
 186 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + \
 188                                  encode_attrs_maxsz)
 189 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 190                                  nfs4_fattr_bitmap_maxsz)
 191 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 192                                  encode_stateid_maxsz + 3)
 193 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 194 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 195                                  2 + encode_verifier_maxsz + 5)
 196 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 197                                  decode_verifier_maxsz)
 198 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 199 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 200 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 201                                  encode_stateid_maxsz + 4)
 202 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 203                                  2 + decode_verifier_maxsz)
 204 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 205 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 206                                  decode_verifier_maxsz)
 207 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 208                                 nfs4_name_maxsz)
 209 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 210                                  decode_change_info_maxsz)
 211 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 212                                 2 * nfs4_name_maxsz)
 213 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 214                                  decode_change_info_maxsz + \
 215                                  decode_change_info_maxsz)
 216 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 217                                 nfs4_name_maxsz)
 218 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 219 #define encode_lockowner_maxsz  (7)
 220 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 221                                  7 + \
 222                                  1 + encode_stateid_maxsz + 1 + \
 223                                  encode_lockowner_maxsz)
 224 #define decode_lock_denied_maxsz \
 225                                 (8 + decode_lockowner_maxsz)
 226 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 227                                  decode_lock_denied_maxsz)
 228 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 229                                 encode_lockowner_maxsz)
 230 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 231                                  decode_lock_denied_maxsz)
 232 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 233                                  encode_stateid_maxsz + \
 234                                  4)
 235 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 236                                  decode_stateid_maxsz)
 237 #define encode_release_lockowner_maxsz \
 238                                 (op_encode_hdr_maxsz + \
 239                                  encode_lockowner_maxsz)
 240 #define decode_release_lockowner_maxsz \
 241                                 (op_decode_hdr_maxsz)
 242 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 243 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 244 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 245                                 1 + nfs4_name_maxsz + \
 246                                 1 + \
 247                                 nfs4_fattr_maxsz)
 248 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 249 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 250                                 1 + 2 + nfs4_name_maxsz + \
 251                                 encode_attrs_maxsz)
 252 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 253                                 decode_change_info_maxsz + \
 254                                 nfs4_fattr_bitmap_maxsz)
 255 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 256 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 257 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 258 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 259 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 260 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 261                                  nfs4_fattr_bitmap_maxsz + 1)
 262 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 263                                  encode_stateid_maxsz + 3)
 264 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 265 #define encode_fs_locations_maxsz \
 266                                 (encode_getattr_maxsz)
 267 #define decode_fs_locations_maxsz \
 268                                 (0)
 269 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 270 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 271
 272 #if defined(CONFIG_NFS_V4_1)
 273 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 274 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 275                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 276
 277 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 278                                 encode_verifier_maxsz + \
 279                                 1 /* co_ownerid.len */ + \
 280                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 281                                 1 /* flags */ + \
 282                                 1 /* spa_how */ + \
 283                                 0 /* SP4_NONE (for now) */ + \
 284                                 1 /* implementation id array of size 1 */ + \
 285                                 1 /* nii_domain */ + \
 286                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 287                                 1 /* nii_name */ + \
 288                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 289                                 3 /* nii_date */)
 290 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 291                                 2 /* eir_clientid */ + \
 292                                 1 /* eir_sequenceid */ + \
 293                                 1 /* eir_flags */ + \
 294                                 1 /* spr_how */ + \
 295                                 0 /* SP4_NONE (for now) */ + \
 296                                 2 /* eir_server_owner.so_minor_id */ + \
 297                                 /* eir_server_owner.so_major_id<> */ \
 298                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 299                                 /* eir_server_scope<> */ \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 301                                 1 /* eir_server_impl_id array length */ + \
 302                                 1 /* nii_domain */ + \
 303                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 304                                 1 /* nii_name */ + \
 305                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 306                                 3 /* nii_date */)
 307 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 308 #define decode_channel_attrs_maxsz  (6 + \
 309                                      1 /* ca_rdma_ird.len */ + \
 310                                      1 /* ca_rdma_ird */)
 311 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 312                                      2 /* csa_clientid */ + \
 313                                      1 /* csa_sequence */ + \
 314                                      1 /* csa_flags */ + \
 315                                      encode_channel_attrs_maxsz + \
 316                                      encode_channel_attrs_maxsz + \
 317                                      1 /* csa_cb_program */ + \
 318                                      1 /* csa_sec_parms.len (1) */ + \
 319                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 320                                      1 /* stamp */ + \
 321                                      1 /* machinename.len */ + \
 322                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 323                                      1 /* uid */ + \
 324                                      1 /* gid */ + \
 325                                      1 /* gids.len (0) */)
 326 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 327                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 328                                      1 /* csr_sequence */ + \
 329                                      1 /* csr_flags */ + \
 330                                      decode_channel_attrs_maxsz + \
 331                                      decode_channel_attrs_maxsz)
 332 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 333                                      /* bctsa_sessid */ \
 334                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 335                                      1 /* bctsa_dir */ + \
 336                                      1 /* bctsa_use_conn_in_rdma_mode */)
 337 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 338                                      /* bctsr_sessid */ \
 339                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 340                                      1 /* bctsr_dir */ + \
 341                                      1 /* bctsr_use_conn_in_rdma_mode */)
 342 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 343 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 344 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 345 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 346 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 347                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 348 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 349                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 350 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 351 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 352 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 353                                 encode_verifier_maxsz)
 354 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 355                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 356                                 decode_verifier_maxsz \
 357                                   /* verifier4 gdlr_verifier */ + \
 358                                 1 /* gdlr_deviceid_list count */ + \
 359                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 360                                             NFS4_DEVICEID4_SIZE) \
 361                                   /* gdlr_deviceid_list */ + \
 362                                 1 /* bool gdlr_eof */)
 363 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 364                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 365 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 366                                 1 /* layout type */ + \
 367                                 1 /* opaque devaddr4 length */ + \
 368                                   /* devaddr4 payload is read into page */ \
 369                                 1 /* notification bitmap length */ + \
 370                                 1 /* notification bitmap */)
 371 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 372                                 encode_stateid_maxsz)
 373 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 374                                 decode_stateid_maxsz + \
 375                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 376 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 377                                 2 /* offset */ + \
 378                                 2 /* length */ + \
 379                                 1 /* reclaim */ + \
 380                                 encode_stateid_maxsz + \
 381                                 1 /* new offset (true) */ + \
 382                                 2 /* last byte written */ + \
 383                                 1 /* nt_timechanged (false) */ + \
 384                                 1 /* layoutupdate4 layout type */ + \
 385                                 1 /* NULL filelayout layoutupdate4 payload */)
 386 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 387 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 388                                 encode_stateid_maxsz + \
 389                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 390 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 391                                 1 + decode_stateid_maxsz)
 392 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 393 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 394 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 395                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 396 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 397 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 398                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 399 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 400 #else /* CONFIG_NFS_V4_1 */
 401 #define encode_sequence_maxsz   0
 402 #define decode_sequence_maxsz   0
 403 #endif /* CONFIG_NFS_V4_1 */
 404
 405 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 406 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 407 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 408                                 encode_sequence_maxsz + \
 409                                 encode_putfh_maxsz + \
 410                                 encode_read_maxsz)
 411 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 412                                 decode_sequence_maxsz + \
 413                                 decode_putfh_maxsz + \
 414                                 decode_read_maxsz)
 415 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 416                                 encode_sequence_maxsz + \
 417                                 encode_putfh_maxsz + \
 418                                 encode_readlink_maxsz)
 419 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 420                                 decode_sequence_maxsz + \
 421                                 decode_putfh_maxsz + \
 422                                 decode_readlink_maxsz)
 423 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 424                                 encode_sequence_maxsz + \
 425                                 encode_putfh_maxsz + \
 426                                 encode_readdir_maxsz)
 427 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 428                                 decode_sequence_maxsz + \
 429                                 decode_putfh_maxsz + \
 430                                 decode_readdir_maxsz)
 431 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 432                                 encode_sequence_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_write_maxsz + \
 435                                 encode_getattr_maxsz)
 436 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 437                                 decode_sequence_maxsz + \
 438                                 decode_putfh_maxsz + \
 439                                 decode_write_maxsz + \
 440                                 decode_getattr_maxsz)
 441 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_commit_maxsz)
 445 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_commit_maxsz)
 449 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_open_maxsz + \
 453                                 encode_access_maxsz + \
 454                                 encode_getfh_maxsz + \
 455                                 encode_getattr_maxsz)
 456 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 457                                 decode_sequence_maxsz + \
 458                                 decode_putfh_maxsz + \
 459                                 decode_open_maxsz + \
 460                                 decode_access_maxsz + \
 461                                 decode_getfh_maxsz + \
 462                                 decode_getattr_maxsz)
 463 #define NFS4_enc_open_confirm_sz \
 464                                 (compound_encode_hdr_maxsz + \
 465                                  encode_putfh_maxsz + \
 466                                  encode_open_confirm_maxsz)
 467 #define NFS4_dec_open_confirm_sz \
 468                                 (compound_decode_hdr_maxsz + \
 469                                  decode_putfh_maxsz + \
 470                                  decode_open_confirm_maxsz)
 471 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 472                                         encode_sequence_maxsz + \
 473                                         encode_putfh_maxsz + \
 474                                         encode_open_maxsz + \
 475                                         encode_access_maxsz + \
 476                                         encode_getattr_maxsz)
 477 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 478                                         decode_sequence_maxsz + \
 479                                         decode_putfh_maxsz + \
 480                                         decode_open_maxsz + \
 481                                         decode_access_maxsz + \
 482                                         decode_getattr_maxsz)
 483 #define NFS4_enc_open_downgrade_sz \
 484                                 (compound_encode_hdr_maxsz + \
 485                                  encode_sequence_maxsz + \
 486                                  encode_putfh_maxsz + \
 487                                  encode_open_downgrade_maxsz + \
 488                                  encode_getattr_maxsz)
 489 #define NFS4_dec_open_downgrade_sz \
 490                                 (compound_decode_hdr_maxsz + \
 491                                  decode_sequence_maxsz + \
 492                                  decode_putfh_maxsz + \
 493                                  decode_open_downgrade_maxsz + \
 494                                  decode_getattr_maxsz)
 495 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 496                                  encode_sequence_maxsz + \
 497                                  encode_putfh_maxsz + \
 498                                  encode_close_maxsz + \
 499                                  encode_getattr_maxsz)
 500 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 501                                  decode_sequence_maxsz + \
 502                                  decode_putfh_maxsz + \
 503                                  decode_close_maxsz + \
 504                                  decode_getattr_maxsz)
 505 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 506                                  encode_sequence_maxsz + \
 507                                  encode_putfh_maxsz + \
 508                                  encode_setattr_maxsz + \
 509                                  encode_getattr_maxsz)
 510 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 511                                  decode_sequence_maxsz + \
 512                                  decode_putfh_maxsz + \
 513                                  decode_setattr_maxsz + \
 514                                  decode_getattr_maxsz)
 515 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 516                                 encode_sequence_maxsz + \
 517                                 encode_putfh_maxsz + \
 518                                 encode_fsinfo_maxsz)
 519 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 520                                 decode_sequence_maxsz + \
 521                                 decode_putfh_maxsz + \
 522                                 decode_fsinfo_maxsz)
 523 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 524                                 encode_renew_maxsz)
 525 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 526                                 decode_renew_maxsz)
 527 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 528                                 encode_setclientid_maxsz)
 529 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 530                                 decode_setclientid_maxsz)
 531 #define NFS4_enc_setclientid_confirm_sz \
 532                                 (compound_encode_hdr_maxsz + \
 533                                 encode_setclientid_confirm_maxsz)
 534 #define NFS4_dec_setclientid_confirm_sz \
 535                                 (compound_decode_hdr_maxsz + \
 536                                 decode_setclientid_confirm_maxsz)
 537 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 538                                 encode_sequence_maxsz + \
 539                                 encode_putfh_maxsz + \
 540                                 encode_lock_maxsz)
 541 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 542                                 decode_sequence_maxsz + \
 543                                 decode_putfh_maxsz + \
 544                                 decode_lock_maxsz)
 545 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 546                                 encode_sequence_maxsz + \
 547                                 encode_putfh_maxsz + \
 548                                 encode_lockt_maxsz)
 549 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 550                                  decode_sequence_maxsz + \
 551                                  decode_putfh_maxsz + \
 552                                  decode_lockt_maxsz)
 553 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 554                                 encode_sequence_maxsz + \
 555                                 encode_putfh_maxsz + \
 556                                 encode_locku_maxsz)
 557 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 558                                 decode_sequence_maxsz + \
 559                                 decode_putfh_maxsz + \
 560                                 decode_locku_maxsz)
 561 #define NFS4_enc_release_lockowner_sz \
 562                                 (compound_encode_hdr_maxsz + \
 563                                  encode_lockowner_maxsz)
 564 #define NFS4_dec_release_lockowner_sz \
 565                                 (compound_decode_hdr_maxsz + \
 566                                  decode_lockowner_maxsz)
 567 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_access_maxsz + \
 571                                 encode_getattr_maxsz)
 572 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 573                                 decode_sequence_maxsz + \
 574                                 decode_putfh_maxsz + \
 575                                 decode_access_maxsz + \
 576                                 decode_getattr_maxsz)
 577 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_getattr_maxsz)
 581 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_getattr_maxsz)
 585 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_lookup_maxsz + \
 589                                 encode_getattr_maxsz + \
 590                                 encode_getfh_maxsz)
 591 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 592                                 decode_sequence_maxsz + \
 593                                 decode_putfh_maxsz + \
 594                                 decode_lookup_maxsz + \
 595                                 decode_getattr_maxsz + \
 596                                 decode_getfh_maxsz)
 597 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putrootfh_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_getfh_maxsz)
 602 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putrootfh_maxsz + \
 605                                 decode_getattr_maxsz + \
 606                                 decode_getfh_maxsz)
 607 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_remove_maxsz)
 611 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_remove_maxsz)
 615 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putfh_maxsz + \
 618                                 encode_savefh_maxsz + \
 619                                 encode_putfh_maxsz + \
 620                                 encode_rename_maxsz)
 621 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_rename_maxsz)
 627 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_savefh_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_link_maxsz + \
 633                                 encode_restorefh_maxsz + \
 634                                 encode_getattr_maxsz)
 635 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_savefh_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_link_maxsz + \
 641                                 decode_restorefh_maxsz + \
 642                                 decode_getattr_maxsz)
 643 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 644                                 encode_sequence_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_symlink_maxsz + \
 647                                 encode_getattr_maxsz + \
 648                                 encode_getfh_maxsz)
 649 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_symlink_maxsz + \
 653                                 decode_getattr_maxsz + \
 654                                 decode_getfh_maxsz)
 655 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 656                                 encode_sequence_maxsz + \
 657                                 encode_putfh_maxsz + \
 658                                 encode_create_maxsz + \
 659                                 encode_getfh_maxsz + \
 660                                 encode_getattr_maxsz)
 661 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 662                                 decode_sequence_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_create_maxsz + \
 665                                 decode_getfh_maxsz + \
 666                                 decode_getattr_maxsz)
 667 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_getattr_maxsz)
 671 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 672                                 decode_sequence_maxsz + \
 673                                 decode_putfh_maxsz + \
 674                                 decode_getattr_maxsz)
 675 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 676                                 encode_sequence_maxsz + \
 677                                 encode_putfh_maxsz + \
 678                                 encode_statfs_maxsz)
 679 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 680                                 decode_sequence_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_statfs_maxsz)
 683 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_getattr_maxsz)
 687 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_getattr_maxsz)
 691 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 692                                 encode_sequence_maxsz + \
 693                                 encode_putfh_maxsz + \
 694                                 encode_delegreturn_maxsz + \
 695                                 encode_getattr_maxsz)
 696 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 697                                 decode_sequence_maxsz + \
 698                                 decode_delegreturn_maxsz + \
 699                                 decode_getattr_maxsz)
 700 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 701                                 encode_sequence_maxsz + \
 702                                 encode_putfh_maxsz + \
 703                                 encode_getacl_maxsz)
 704 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 705                                 decode_sequence_maxsz + \
 706                                 decode_putfh_maxsz + \
 707                                 decode_getacl_maxsz)
 708 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_setacl_maxsz)
 712 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 713                                 decode_sequence_maxsz + \
 714                                 decode_putfh_maxsz + \
 715                                 decode_setacl_maxsz)
 716 #define NFS4_enc_fs_locations_sz \
 717                                 (compound_encode_hdr_maxsz + \
 718                                  encode_sequence_maxsz + \
 719                                  encode_putfh_maxsz + \
 720                                  encode_lookup_maxsz + \
 721                                  encode_fs_locations_maxsz)
 722 #define NFS4_dec_fs_locations_sz \
 723                                 (compound_decode_hdr_maxsz + \
 724                                  decode_sequence_maxsz + \
 725                                  decode_putfh_maxsz + \
 726                                  decode_lookup_maxsz + \
 727                                  decode_fs_locations_maxsz)
 728 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 729                                 encode_sequence_maxsz + \
 730                                 encode_putfh_maxsz + \
 731                                 encode_secinfo_maxsz)
 732 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 733                                 decode_sequence_maxsz + \
 734                                 decode_putfh_maxsz + \
 735                                 decode_secinfo_maxsz)
 736 #if defined(CONFIG_NFS_V4_1)
 737 #define NFS4_enc_bind_conn_to_session_sz \
 738                                 (compound_encode_hdr_maxsz + \
 739                                  encode_bind_conn_to_session_maxsz)
 740 #define NFS4_dec_bind_conn_to_session_sz \
 741                                 (compound_decode_hdr_maxsz + \
 742                                  decode_bind_conn_to_session_maxsz)
 743 #define NFS4_enc_exchange_id_sz \
 744                                 (compound_encode_hdr_maxsz + \
 745                                  encode_exchange_id_maxsz)
 746 #define NFS4_dec_exchange_id_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  decode_exchange_id_maxsz)
 749 #define NFS4_enc_create_session_sz \
 750                                 (compound_encode_hdr_maxsz + \
 751                                  encode_create_session_maxsz)
 752 #define NFS4_dec_create_session_sz \
 753                                 (compound_decode_hdr_maxsz + \
 754                                  decode_create_session_maxsz)
 755 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 756                                          encode_destroy_session_maxsz)
 757 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 758                                          decode_destroy_session_maxsz)
 759 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 760                                          encode_destroy_clientid_maxsz)
 761 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 762                                          decode_destroy_clientid_maxsz)
 763 #define NFS4_enc_sequence_sz \
 764                                 (compound_decode_hdr_maxsz + \
 765                                  encode_sequence_maxsz)
 766 #define NFS4_dec_sequence_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_sequence_maxsz)
 769 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 770                                          encode_sequence_maxsz + \
 771                                          encode_putrootfh_maxsz + \
 772                                          encode_fsinfo_maxsz)
 773 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 774                                          decode_sequence_maxsz + \
 775                                          decode_putrootfh_maxsz + \
 776                                          decode_fsinfo_maxsz)
 777 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 778                                          encode_sequence_maxsz + \
 779                                          encode_reclaim_complete_maxsz)
 780 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 781                                          decode_sequence_maxsz + \
 782                                          decode_reclaim_complete_maxsz)
 783 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 784                                 encode_sequence_maxsz + \
 785                                 encode_putfh_maxsz + \
 786                                 encode_getdevicelist_maxsz)
 787 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 788                                 decode_sequence_maxsz + \
 789                                 decode_putfh_maxsz + \
 790                                 decode_getdevicelist_maxsz)
 791 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 792                                 encode_sequence_maxsz +\
 793                                 encode_getdeviceinfo_maxsz)
 794 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 795                                 decode_sequence_maxsz + \
 796                                 decode_getdeviceinfo_maxsz)
 797 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 798                                 encode_sequence_maxsz + \
 799                                 encode_putfh_maxsz +        \
 800                                 encode_layoutget_maxsz)
 801 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 802                                 decode_sequence_maxsz + \
 803                                 decode_putfh_maxsz +        \
 804                                 decode_layoutget_maxsz)
 805 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 806                                 encode_sequence_maxsz +\
 807                                 encode_putfh_maxsz + \
 808                                 encode_layoutcommit_maxsz + \
 809                                 encode_getattr_maxsz)
 810 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 811                                 decode_sequence_maxsz + \
 812                                 decode_putfh_maxsz + \
 813                                 decode_layoutcommit_maxsz + \
 814                                 decode_getattr_maxsz)
 815 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 816                                 encode_sequence_maxsz + \
 817                                 encode_putfh_maxsz + \
 818                                 encode_layoutreturn_maxsz)
 819 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 820                                 decode_sequence_maxsz + \
 821                                 decode_putfh_maxsz + \
 822                                 decode_layoutreturn_maxsz)
 823 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 824                                         encode_sequence_maxsz + \
 825                                         encode_putrootfh_maxsz +\
 826                                         encode_secinfo_no_name_maxsz)
 827 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 828                                         decode_sequence_maxsz + \
 829                                         decode_putrootfh_maxsz + \
 830                                         decode_secinfo_no_name_maxsz)
 831 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 832                                          encode_sequence_maxsz + \
 833                                          encode_test_stateid_maxsz)
 834 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 835                                          decode_sequence_maxsz + \
 836                                          decode_test_stateid_maxsz)
 837 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 838                                          encode_sequence_maxsz + \
 839                                          encode_free_stateid_maxsz)
 840 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 841                                          decode_sequence_maxsz + \
 842                                          decode_free_stateid_maxsz)
 843
 844 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 845                                       compound_encode_hdr_maxsz +
 846                                       encode_sequence_maxsz +
 847                                       encode_putfh_maxsz +
 848                                       encode_getattr_maxsz) *
 849                                      XDR_UNIT);
 850
 851 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 852                                      compound_decode_hdr_maxsz +
 853                                      decode_sequence_maxsz +
 854                                      decode_putfh_maxsz) *
 855                                     XDR_UNIT);
 856 #endif /* CONFIG_NFS_V4_1 */
 857
 858 static const umode_t nfs_type2fmt[] = {
 859         [NF4BAD] = 0,
 860         [NF4REG] = S_IFREG,
 861         [NF4DIR] = S_IFDIR,
 862         [NF4BLK] = S_IFBLK,
 863         [NF4CHR] = S_IFCHR,
 864         [NF4LNK] = S_IFLNK,
 865         [NF4SOCK] = S_IFSOCK,
 866         [NF4FIFO] = S_IFIFO,
 867         [NF4ATTRDIR] = 0,
 868         [NF4NAMEDATTR] = 0,
 869 };
 870
 871 struct compound_hdr {
 872         int32_t         status;
 873         uint32_t        nops;
 874         __be32 *        nops_p;
 875         uint32_t        taglen;
 876         char *          tag;
 877         uint32_t        replen;         /* expected reply words */
 878         u32             minorversion;
 879 };
 880
 881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 882 {
 883         __be32 *p = xdr_reserve_space(xdr, nbytes);
 884         BUG_ON(!p);
 885         return p;
 886 }
 887
 888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 889 {
 890         __be32 *p;
 891
 892         p = xdr_reserve_space(xdr, len);
 893         xdr_encode_opaque_fixed(p, buf, len);
 894 }
 895
 896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 897 {
 898         __be32 *p;
 899
 900         p = reserve_space(xdr, 4 + len);
 901         xdr_encode_opaque(p, str, len);
 902 }
 903
 904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 905 {
 906         __be32 *p;
 907
 908         p = reserve_space(xdr, 4);
 909         *p = cpu_to_be32(n);
 910 }
 911
 912 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 913 {
 914         __be32 *p;
 915
 916         p = reserve_space(xdr, 8);
 917         xdr_encode_hyper(p, n);
 918 }
 919
 920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 921                 const struct nfs_seqid *seqid)
 922 {
 923         encode_uint32(xdr, seqid->sequence->counter);
 924 }
 925
 926 static void encode_compound_hdr(struct xdr_stream *xdr,
 927                                 struct rpc_rqst *req,
 928                                 struct compound_hdr *hdr)
 929 {
 930         __be32 *p;
 931         struct rpc_auth *auth = req->rq_cred->cr_auth;
 932
 933         /* initialize running count of expected bytes in reply.
 934          * NOTE: the replied tag SHOULD be the same is the one sent,
 935          * but this is not required as a MUST for the server to do so. */
 936         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 937
 938         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 939         encode_string(xdr, hdr->taglen, hdr->tag);
 940         p = reserve_space(xdr, 8);
 941         *p++ = cpu_to_be32(hdr->minorversion);
 942         hdr->nops_p = p;
 943         *p = cpu_to_be32(hdr->nops);
 944 }
 945
 946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 947                 uint32_t replen,
 948                 struct compound_hdr *hdr)
 949 {
 950         encode_uint32(xdr, op);
 951         hdr->nops++;
 952         hdr->replen += replen;
 953 }
 954
 955 static void encode_nops(struct compound_hdr *hdr)
 956 {
 957         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 958         *hdr->nops_p = htonl(hdr->nops);
 959 }
 960
 961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 962 {
 963         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 964 }
 965
 966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 967 {
 968         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 969 }
 970
 971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 972 {
 973         char owner_name[IDMAP_NAMESZ];
 974         char owner_group[IDMAP_NAMESZ];
 975         int owner_namelen = 0;
 976         int owner_grouplen = 0;
 977         __be32 *p;
 978         __be32 *q;
 979         int len;
 980         uint32_t bmval0 = 0;
 981         uint32_t bmval1 = 0;
 982
 983         /*
 984          * We reserve enough space to write the entire attribute buffer at once.
 985          * In the worst-case, this would be
 986          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 987          *          = 36 bytes, plus any contribution from variable-length fields
 988          *            such as owner/group.
 989          */
 990         len = 16;
 991
 992         /* Sigh */
 993         if (iap->ia_valid & ATTR_SIZE)
 994                 len += 8;
 995         if (iap->ia_valid & ATTR_MODE)
 996                 len += 4;
 997         if (iap->ia_valid & ATTR_UID) {
 998                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 999                 if (owner_namelen < 0) {
1000                         dprintk("nfs: couldn't resolve uid %d to string\n",
1001                                         from_kuid(&init_user_ns, iap->ia_uid));
1002                         /* XXX */
1003                         strcpy(owner_name, "nobody");
1004                         owner_namelen = sizeof("nobody") - 1;
1005                         /* goto out; */
1006                 }
1007                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008         }
1009         if (iap->ia_valid & ATTR_GID) {
1010                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011                 if (owner_grouplen < 0) {
1012                         dprintk("nfs: couldn't resolve gid %d to string\n",
1013                                         from_kgid(&init_user_ns, iap->ia_gid));
1014                         strcpy(owner_group, "nobody");
1015                         owner_grouplen = sizeof("nobody") - 1;
1016                         /* goto out; */
1017                 }
1018                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019         }
1020         if (iap->ia_valid & ATTR_ATIME_SET)
1021                 len += 16;
1022         else if (iap->ia_valid & ATTR_ATIME)
1023                 len += 4;
1024         if (iap->ia_valid & ATTR_MTIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_MTIME)
1027                 len += 4;
1028         p = reserve_space(xdr, len);
1029
1030         /*
1031          * We write the bitmap length now, but leave the bitmap and the attribute
1032          * buffer length to be backfilled at the end of this routine.
1033          */
1034         *p++ = cpu_to_be32(2);
1035         q = p;
1036         p += 3;
1037
1038         if (iap->ia_valid & ATTR_SIZE) {
1039                 bmval0 |= FATTR4_WORD0_SIZE;
1040                 p = xdr_encode_hyper(p, iap->ia_size);
1041         }
1042         if (iap->ia_valid & ATTR_MODE) {
1043                 bmval1 |= FATTR4_WORD1_MODE;
1044                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045         }
1046         if (iap->ia_valid & ATTR_UID) {
1047                 bmval1 |= FATTR4_WORD1_OWNER;
1048                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057                 *p++ = cpu_to_be32(0);
1058                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1059                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1060         }
1061         else if (iap->ia_valid & ATTR_ATIME) {
1062                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1064         }
1065         if (iap->ia_valid & ATTR_MTIME_SET) {
1066                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1068                 *p++ = cpu_to_be32(0);
1069                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1070                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1071         }
1072         else if (iap->ia_valid & ATTR_MTIME) {
1073                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1075         }
1076
1077         /*
1078          * Now we backfill the bitmap and the attribute buffer length.
1079          */
1080         if (len != ((char *)p - (char *)q) + 4) {
1081                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1082                                 len, ((char *)p - (char *)q) + 4);
1083                 BUG();
1084         }
1085         len = (char *)p - (char *)q - 12;
1086         *q++ = htonl(bmval0);
1087         *q++ = htonl(bmval1);
1088         *q = htonl(len);
1089
1090 /* out: */
1091 }
1092
1093 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1094 {
1095         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1096         encode_uint32(xdr, access);
1097 }
1098
1099 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1100 {
1101         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1102         encode_nfs4_seqid(xdr, arg->seqid);
1103         encode_nfs4_stateid(xdr, arg->stateid);
1104 }
1105
1106 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1107 {
1108         __be32 *p;
1109
1110         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1111         p = reserve_space(xdr, 12);
1112         p = xdr_encode_hyper(p, args->offset);
1113         *p = cpu_to_be32(args->count);
1114 }
1115
1116 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1117 {
1118         __be32 *p;
1119
1120         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1121         encode_uint32(xdr, create->ftype);
1122
1123         switch (create->ftype) {
1124         case NF4LNK:
1125                 p = reserve_space(xdr, 4);
1126                 *p = cpu_to_be32(create->u.symlink.len);
1127                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1128                 break;
1129
1130         case NF4BLK: case NF4CHR:
1131                 p = reserve_space(xdr, 8);
1132                 *p++ = cpu_to_be32(create->u.device.specdata1);
1133                 *p = cpu_to_be32(create->u.device.specdata2);
1134                 break;
1135
1136         default:
1137                 break;
1138         }
1139
1140         encode_string(xdr, create->name->len, create->name->name);
1141         encode_attrs(xdr, create->attrs, create->server);
1142 }
1143
1144 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1149         p = reserve_space(xdr, 8);
1150         *p++ = cpu_to_be32(1);
1151         *p = cpu_to_be32(bitmap);
1152 }
1153
1154 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1155 {
1156         __be32 *p;
1157
1158         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1159         p = reserve_space(xdr, 12);
1160         *p++ = cpu_to_be32(2);
1161         *p++ = cpu_to_be32(bm0);
1162         *p = cpu_to_be32(bm1);
1163 }
1164
1165 static void
1166 encode_getattr_three(struct xdr_stream *xdr,
1167                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1168                      struct compound_hdr *hdr)
1169 {
1170         __be32 *p;
1171
1172         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1173         if (bm2) {
1174                 p = reserve_space(xdr, 16);
1175                 *p++ = cpu_to_be32(3);
1176                 *p++ = cpu_to_be32(bm0);
1177                 *p++ = cpu_to_be32(bm1);
1178                 *p = cpu_to_be32(bm2);
1179         } else if (bm1) {
1180                 p = reserve_space(xdr, 12);
1181                 *p++ = cpu_to_be32(2);
1182                 *p++ = cpu_to_be32(bm0);
1183                 *p = cpu_to_be32(bm1);
1184         } else {
1185                 p = reserve_space(xdr, 8);
1186                 *p++ = cpu_to_be32(1);
1187                 *p = cpu_to_be32(bm0);
1188         }
1189 }
1190
1191 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1192 {
1193         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1194                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1195 }
1196
1197 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1198                                  const u32 *open_bitmap,
1199                                  struct compound_hdr *hdr)
1200 {
1201         encode_getattr_three(xdr,
1202                              bitmask[0] & open_bitmap[0],
1203                              bitmask[1] & open_bitmap[1],
1204                              bitmask[2] & open_bitmap[2],
1205                              hdr);
1206 }
1207
1208 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1209 {
1210         encode_getattr_three(xdr,
1211                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1212                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1213                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1214                              hdr);
1215 }
1216
1217 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1218 {
1219         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1220                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1221 }
1222
1223 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1224 {
1225         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1226 }
1227
1228 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1229 {
1230         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1231         encode_string(xdr, name->len, name->name);
1232 }
1233
1234 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1235 {
1236         if (fl->fl_type == F_RDLCK)
1237                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1238         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1239 }
1240
1241 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1242 {
1243         if (fl->fl_end == OFFSET_MAX)
1244                 return ~(uint64_t)0;
1245         return fl->fl_end - fl->fl_start + 1;
1246 }
1247
1248 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1249 {
1250         __be32 *p;
1251
1252         p = reserve_space(xdr, 32);
1253         p = xdr_encode_hyper(p, lowner->clientid);
1254         *p++ = cpu_to_be32(20);
1255         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1256         *p++ = cpu_to_be32(lowner->s_dev);
1257         xdr_encode_hyper(p, lowner->id);
1258 }
1259
1260 /*
1261  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1262  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1263  */
1264 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1265 {
1266         __be32 *p;
1267
1268         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1269         p = reserve_space(xdr, 28);
1270         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1271         *p++ = cpu_to_be32(args->reclaim);
1272         p = xdr_encode_hyper(p, args->fl->fl_start);
1273         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1274         *p = cpu_to_be32(args->new_lock_owner);
1275         if (args->new_lock_owner){
1276                 encode_nfs4_seqid(xdr, args->open_seqid);
1277                 encode_nfs4_stateid(xdr, args->open_stateid);
1278                 encode_nfs4_seqid(xdr, args->lock_seqid);
1279                 encode_lockowner(xdr, &args->lock_owner);
1280         }
1281         else {
1282                 encode_nfs4_stateid(xdr, args->lock_stateid);
1283                 encode_nfs4_seqid(xdr, args->lock_seqid);
1284         }
1285 }
1286
1287 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1288 {
1289         __be32 *p;
1290
1291         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1292         p = reserve_space(xdr, 20);
1293         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1294         p = xdr_encode_hyper(p, args->fl->fl_start);
1295         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1296         encode_lockowner(xdr, &args->lock_owner);
1297 }
1298
1299 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1300 {
1301         __be32 *p;
1302
1303         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1304         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1305         encode_nfs4_seqid(xdr, args->seqid);
1306         encode_nfs4_stateid(xdr, args->stateid);
1307         p = reserve_space(xdr, 16);
1308         p = xdr_encode_hyper(p, args->fl->fl_start);
1309         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1310 }
1311
1312 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1313 {
1314         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1315         encode_lockowner(xdr, lowner);
1316 }
1317
1318 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1319 {
1320         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1321         encode_string(xdr, name->len, name->name);
1322 }
1323
1324 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1325 {
1326         __be32 *p;
1327
1328         p = reserve_space(xdr, 8);
1329         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1330         case FMODE_READ:
1331                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1332                 break;
1333         case FMODE_WRITE:
1334                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1335                 break;
1336         case FMODE_READ|FMODE_WRITE:
1337                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1338                 break;
1339         default:
1340                 *p++ = cpu_to_be32(0);
1341         }
1342         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1343 }
1344
1345 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1346 {
1347         __be32 *p;
1348  /*
1349  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1350  * owner 4 = 32
1351  */
1352         encode_nfs4_seqid(xdr, arg->seqid);
1353         encode_share_access(xdr, arg->fmode);
1354         p = reserve_space(xdr, 36);
1355         p = xdr_encode_hyper(p, arg->clientid);
1356         *p++ = cpu_to_be32(24);
1357         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1358         *p++ = cpu_to_be32(arg->server->s_dev);
1359         *p++ = cpu_to_be32(arg->id.uniquifier);
1360         xdr_encode_hyper(p, arg->id.create_time);
1361 }
1362
1363 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1364 {
1365         __be32 *p;
1366         struct nfs_client *clp;
1367
1368         p = reserve_space(xdr, 4);
1369         switch(arg->open_flags & O_EXCL) {
1370         case 0:
1371                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1372                 encode_attrs(xdr, arg->u.attrs, arg->server);
1373                 break;
1374         default:
1375                 clp = arg->server->nfs_client;
1376                 if (clp->cl_mvops->minor_version > 0) {
1377                         if (nfs4_has_persistent_session(clp)) {
1378                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1379                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1380                         } else {
1381                                 struct iattr dummy;
1382
1383                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1384                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1385                                 dummy.ia_valid = 0;
1386                                 encode_attrs(xdr, &dummy, arg->server);
1387                         }
1388                 } else {
1389                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1390                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1391                 }
1392         }
1393 }
1394
1395 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1396 {
1397         __be32 *p;
1398
1399         p = reserve_space(xdr, 4);
1400         switch (arg->open_flags & O_CREAT) {
1401         case 0:
1402                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1403                 break;
1404         default:
1405                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1406                 encode_createmode(xdr, arg);
1407         }
1408 }
1409
1410 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1411 {
1412         __be32 *p;
1413
1414         p = reserve_space(xdr, 4);
1415         switch (delegation_type) {
1416         case 0:
1417                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1418                 break;
1419         case FMODE_READ:
1420                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1421                 break;
1422         case FMODE_WRITE|FMODE_READ:
1423                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1424                 break;
1425         default:
1426                 BUG();
1427         }
1428 }
1429
1430 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1436         encode_string(xdr, name->len, name->name);
1437 }
1438
1439 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1440 {
1441         __be32 *p;
1442
1443         p = reserve_space(xdr, 4);
1444         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1445         encode_delegation_type(xdr, type);
1446 }
1447
1448 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1449 {
1450         __be32 *p;
1451
1452         p = reserve_space(xdr, 4);
1453         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1454         encode_nfs4_stateid(xdr, stateid);
1455         encode_string(xdr, name->len, name->name);
1456 }
1457
1458 static inline void encode_claim_fh(struct xdr_stream *xdr)
1459 {
1460         __be32 *p;
1461
1462         p = reserve_space(xdr, 4);
1463         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1464 }
1465
1466 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1467 {
1468         __be32 *p;
1469
1470         p = reserve_space(xdr, 4);
1471         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1472         encode_nfs4_stateid(xdr, stateid);
1473 }
1474
1475 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1476 {
1477         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1478         encode_openhdr(xdr, arg);
1479         encode_opentype(xdr, arg);
1480         switch (arg->claim) {
1481         case NFS4_OPEN_CLAIM_NULL:
1482                 encode_claim_null(xdr, arg->name);
1483                 break;
1484         case NFS4_OPEN_CLAIM_PREVIOUS:
1485                 encode_claim_previous(xdr, arg->u.delegation_type);
1486                 break;
1487         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1488                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1489                 break;
1490         case NFS4_OPEN_CLAIM_FH:
1491                 encode_claim_fh(xdr);
1492                 break;
1493         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1494                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1495                 break;
1496         default:
1497                 BUG();
1498         }
1499 }
1500
1501 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1502 {
1503         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1504         encode_nfs4_stateid(xdr, arg->stateid);
1505         encode_nfs4_seqid(xdr, arg->seqid);
1506 }
1507
1508 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1509 {
1510         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1511         encode_nfs4_stateid(xdr, arg->stateid);
1512         encode_nfs4_seqid(xdr, arg->seqid);
1513         encode_share_access(xdr, arg->fmode);
1514 }
1515
1516 static void
1517 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1518 {
1519         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1520         encode_string(xdr, fh->size, fh->data);
1521 }
1522
1523 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1524 {
1525         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1526 }
1527
1528 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1529 {
1530         __be32 *p;
1531
1532         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1533         encode_nfs4_stateid(xdr, &args->stateid);
1534
1535         p = reserve_space(xdr, 12);
1536         p = xdr_encode_hyper(p, args->offset);
1537         *p = cpu_to_be32(args->count);
1538 }
1539
1540 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1541 {
1542         uint32_t attrs[2] = {
1543                 FATTR4_WORD0_RDATTR_ERROR,
1544                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1545         };
1546         uint32_t dircount = readdir->count >> 1;
1547         __be32 *p, verf[2];
1548
1549         if (readdir->plus) {
1550                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1551                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1552                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1553                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1554                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1555                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1556                 dircount >>= 1;
1557         }
1558         /* Use mounted_on_fileid only if the server supports it */
1559         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1560                 attrs[0] |= FATTR4_WORD0_FILEID;
1561
1562         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1563         encode_uint64(xdr, readdir->cookie);
1564         encode_nfs4_verifier(xdr, &readdir->verifier);
1565         p = reserve_space(xdr, 20);
1566         *p++ = cpu_to_be32(dircount);
1567         *p++ = cpu_to_be32(readdir->count);
1568         *p++ = cpu_to_be32(2);
1569
1570         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1571         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1572         memcpy(verf, readdir->verifier.data, sizeof(verf));
1573         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1574                         __func__,
1575                         (unsigned long long)readdir->cookie,
1576                         verf[0], verf[1],
1577                         attrs[0] & readdir->bitmask[0],
1578                         attrs[1] & readdir->bitmask[1]);
1579 }
1580
1581 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1582 {
1583         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1584 }
1585
1586 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1587 {
1588         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1589         encode_string(xdr, name->len, name->name);
1590 }
1591
1592 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1593 {
1594         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1595         encode_string(xdr, oldname->len, oldname->name);
1596         encode_string(xdr, newname->len, newname->name);
1597 }
1598
1599 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1600                          struct compound_hdr *hdr)
1601 {
1602         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1603         encode_uint64(xdr, clid);
1604 }
1605
1606 static void
1607 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1608 {
1609         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1610 }
1611
1612 static void
1613 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1614 {
1615         __be32 *p;
1616
1617         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1618         encode_nfs4_stateid(xdr, &zero_stateid);
1619         p = reserve_space(xdr, 2*4);
1620         *p++ = cpu_to_be32(1);
1621         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1622         p = reserve_space(xdr, 4);
1623         *p = cpu_to_be32(arg->acl_len);
1624         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1625 }
1626
1627 static void
1628 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1629 {
1630         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1631 }
1632
1633 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1636         encode_nfs4_stateid(xdr, &arg->stateid);
1637         encode_attrs(xdr, arg->iap, server);
1638 }
1639
1640 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1641 {
1642         __be32 *p;
1643
1644         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1645         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1646
1647         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1648         p = reserve_space(xdr, 4);
1649         *p = cpu_to_be32(setclientid->sc_prog);
1650         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1651         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_cb_ident);
1654 }
1655
1656 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1657 {
1658         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1659                         decode_setclientid_confirm_maxsz, hdr);
1660         encode_uint64(xdr, arg->clientid);
1661         encode_nfs4_verifier(xdr, &arg->confirm);
1662 }
1663
1664 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1665 {
1666         __be32 *p;
1667
1668         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1669         encode_nfs4_stateid(xdr, &args->stateid);
1670
1671         p = reserve_space(xdr, 16);
1672         p = xdr_encode_hyper(p, args->offset);
1673         *p++ = cpu_to_be32(args->stable);
1674         *p = cpu_to_be32(args->count);
1675
1676         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1677 }
1678
1679 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1680 {
1681         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1682         encode_nfs4_stateid(xdr, stateid);
1683 }
1684
1685 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1686 {
1687         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1688         encode_string(xdr, name->len, name->name);
1689 }
1690
1691 #if defined(CONFIG_NFS_V4_1)
1692 /* NFSv4.1 operations */
1693 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1694                                    struct nfs4_session *session,
1695                                    struct compound_hdr *hdr)
1696 {
1697         __be32 *p;
1698
1699         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1700                 decode_bind_conn_to_session_maxsz, hdr);
1701         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1702         p = xdr_reserve_space(xdr, 8);
1703         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1704         *p = 0; /* use_conn_in_rdma_mode = False */
1705 }
1706
1707 static void encode_exchange_id(struct xdr_stream *xdr,
1708                                struct nfs41_exchange_id_args *args,
1709                                struct compound_hdr *hdr)
1710 {
1711         __be32 *p;
1712         char impl_name[IMPL_NAME_LIMIT];
1713         int len = 0;
1714
1715         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1716         encode_nfs4_verifier(xdr, args->verifier);
1717
1718         encode_string(xdr, args->id_len, args->id);
1719
1720         p = reserve_space(xdr, 12);
1721         *p++ = cpu_to_be32(args->flags);
1722         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1723
1724         if (send_implementation_id &&
1725             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1726             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1727                 <= sizeof(impl_name) + 1)
1728                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1729                                utsname()->sysname, utsname()->release,
1730                                utsname()->version, utsname()->machine);
1731
1732         if (len > 0) {
1733                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1734
1735                 encode_string(xdr,
1736                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1737                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1738                 encode_string(xdr, len, impl_name);
1739                 /* just send zeros for nii_date - the date is in nii_name */
1740                 p = reserve_space(xdr, 12);
1741                 p = xdr_encode_hyper(p, 0);
1742                 *p = cpu_to_be32(0);
1743         } else
1744                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1745 }
1746
1747 static void encode_create_session(struct xdr_stream *xdr,
1748                                   struct nfs41_create_session_args *args,
1749                                   struct compound_hdr *hdr)
1750 {
1751         __be32 *p;
1752         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1753         uint32_t len;
1754         struct nfs_client *clp = args->client;
1755         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1756         u32 max_resp_sz_cached;
1757
1758         /*
1759          * Assumes OPEN is the biggest non-idempotent compound.
1760          * 2 is the verifier.
1761          */
1762         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1763                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1764
1765         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1766                         clp->cl_ipaddr);
1767
1768         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1769         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1770         p = xdr_encode_hyper(p, clp->cl_clientid);
1771         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1772         *p++ = cpu_to_be32(args->flags);                        /*flags */
1773
1774         /* Fore Channel */
1775         *p++ = cpu_to_be32(0);                          /* header padding size */
1776         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1777         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1778         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1779         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1780         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1781         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1782
1783         /* Back Channel */
1784         *p++ = cpu_to_be32(0);                          /* header padding size */
1785         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1786         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1787         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1788         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1790         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1791
1792         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1793         *p++ = cpu_to_be32(1);
1794         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1795
1796         /* authsys_parms rfc1831 */
1797         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1798         p = xdr_encode_opaque(p, machine_name, len);
1799         *p++ = cpu_to_be32(0);                          /* UID */
1800         *p++ = cpu_to_be32(0);                          /* GID */
1801         *p = cpu_to_be32(0);                            /* No more gids */
1802 }
1803
1804 static void encode_destroy_session(struct xdr_stream *xdr,
1805                                    struct nfs4_session *session,
1806                                    struct compound_hdr *hdr)
1807 {
1808         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1809         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1810 }
1811
1812 static void encode_destroy_clientid(struct xdr_stream *xdr,
1813                                    uint64_t clientid,
1814                                    struct compound_hdr *hdr)
1815 {
1816         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1817         encode_uint64(xdr, clientid);
1818 }
1819
1820 static void encode_reclaim_complete(struct xdr_stream *xdr,
1821                                     struct nfs41_reclaim_complete_args *args,
1822                                     struct compound_hdr *hdr)
1823 {
1824         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1825         encode_uint32(xdr, args->one_fs);
1826 }
1827 #endif /* CONFIG_NFS_V4_1 */
1828
1829 static void encode_sequence(struct xdr_stream *xdr,
1830                             const struct nfs4_sequence_args *args,
1831                             struct compound_hdr *hdr)
1832 {
1833 #if defined(CONFIG_NFS_V4_1)
1834         struct nfs4_session *session;
1835         struct nfs4_slot_table *tp;
1836         struct nfs4_slot *slot = args->sa_slot;
1837         __be32 *p;
1838
1839         if (slot == NULL)
1840                 return;
1841
1842         tp = slot->table;
1843         session = tp->session;
1844
1845         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1846
1847         /*
1848          * Sessionid + seqid + slotid + max slotid + cache_this
1849          */
1850         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1851                 "max_slotid=%d cache_this=%d\n",
1852                 __func__,
1853                 ((u32 *)session->sess_id.data)[0],
1854                 ((u32 *)session->sess_id.data)[1],
1855                 ((u32 *)session->sess_id.data)[2],
1856                 ((u32 *)session->sess_id.data)[3],
1857                 slot->seq_nr, slot->slot_nr,
1858                 tp->highest_used_slotid, args->sa_cache_this);
1859         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1860         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1861         *p++ = cpu_to_be32(slot->seq_nr);
1862         *p++ = cpu_to_be32(slot->slot_nr);
1863         *p++ = cpu_to_be32(tp->highest_used_slotid);
1864         *p = cpu_to_be32(args->sa_cache_this);
1865 #endif /* CONFIG_NFS_V4_1 */
1866 }
1867
1868 #ifdef CONFIG_NFS_V4_1
1869 static void
1870 encode_getdevicelist(struct xdr_stream *xdr,
1871                      const struct nfs4_getdevicelist_args *args,
1872                      struct compound_hdr *hdr)
1873 {
1874         __be32 *p;
1875         nfs4_verifier dummy = {
1876                 .data = "dummmmmy",
1877         };
1878
1879         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1880         p = reserve_space(xdr, 16);
1881         *p++ = cpu_to_be32(args->layoutclass);
1882         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1883         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1884         encode_nfs4_verifier(xdr, &dummy);
1885 }
1886
1887 static void
1888 encode_getdeviceinfo(struct xdr_stream *xdr,
1889                      const struct nfs4_getdeviceinfo_args *args,
1890                      struct compound_hdr *hdr)
1891 {
1892         __be32 *p;
1893
1894         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1895         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1896         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1897                                     NFS4_DEVICEID4_SIZE);
1898         *p++ = cpu_to_be32(args->pdev->layout_type);
1899         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1900         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1901 }
1902
1903 static void
1904 encode_layoutget(struct xdr_stream *xdr,
1905                       const struct nfs4_layoutget_args *args,
1906                       struct compound_hdr *hdr)
1907 {
1908         __be32 *p;
1909
1910         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1911         p = reserve_space(xdr, 36);
1912         *p++ = cpu_to_be32(0);     /* Signal layout available */
1913         *p++ = cpu_to_be32(args->type);
1914         *p++ = cpu_to_be32(args->range.iomode);
1915         p = xdr_encode_hyper(p, args->range.offset);
1916         p = xdr_encode_hyper(p, args->range.length);
1917         p = xdr_encode_hyper(p, args->minlength);
1918         encode_nfs4_stateid(xdr, &args->stateid);
1919         encode_uint32(xdr, args->maxcount);
1920
1921         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1922                 __func__,
1923                 args->type,
1924                 args->range.iomode,
1925                 (unsigned long)args->range.offset,
1926                 (unsigned long)args->range.length,
1927                 args->maxcount);
1928 }
1929
1930 static int
1931 encode_layoutcommit(struct xdr_stream *xdr,
1932                     struct inode *inode,
1933                     const struct nfs4_layoutcommit_args *args,
1934                     struct compound_hdr *hdr)
1935 {
1936         __be32 *p;
1937
1938         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1939                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1940
1941         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1942         p = reserve_space(xdr, 20);
1943         /* Only whole file layouts */
1944         p = xdr_encode_hyper(p, 0); /* offset */
1945         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1946         *p = cpu_to_be32(0); /* reclaim */
1947         encode_nfs4_stateid(xdr, &args->stateid);
1948         p = reserve_space(xdr, 20);
1949         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1950         p = xdr_encode_hyper(p, args->lastbytewritten);
1951         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1952         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1953
1954         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1955                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1956                         NFS_I(inode)->layout, xdr, args);
1957         else
1958                 encode_uint32(xdr, 0); /* no layout-type payload */
1959
1960         return 0;
1961 }
1962
1963 static void
1964 encode_layoutreturn(struct xdr_stream *xdr,
1965                     const struct nfs4_layoutreturn_args *args,
1966                     struct compound_hdr *hdr)
1967 {
1968         __be32 *p;
1969
1970         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1971         p = reserve_space(xdr, 16);
1972         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1973         *p++ = cpu_to_be32(args->layout_type);
1974         *p++ = cpu_to_be32(IOMODE_ANY);
1975         *p = cpu_to_be32(RETURN_FILE);
1976         p = reserve_space(xdr, 16);
1977         p = xdr_encode_hyper(p, 0);
1978         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1979         spin_lock(&args->inode->i_lock);
1980         encode_nfs4_stateid(xdr, &args->stateid);
1981         spin_unlock(&args->inode->i_lock);
1982         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1983                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1984                         NFS_I(args->inode)->layout, xdr, args);
1985         } else
1986                 encode_uint32(xdr, 0);
1987 }
1988
1989 static int
1990 encode_secinfo_no_name(struct xdr_stream *xdr,
1991                        const struct nfs41_secinfo_no_name_args *args,
1992                        struct compound_hdr *hdr)
1993 {
1994         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1995         encode_uint32(xdr, args->style);
1996         return 0;
1997 }
1998
1999 static void encode_test_stateid(struct xdr_stream *xdr,
2000                                 struct nfs41_test_stateid_args *args,
2001                                 struct compound_hdr *hdr)
2002 {
2003         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2004         encode_uint32(xdr, 1);
2005         encode_nfs4_stateid(xdr, args->stateid);
2006 }
2007
2008 static void encode_free_stateid(struct xdr_stream *xdr,
2009                                 struct nfs41_free_stateid_args *args,
2010                                 struct compound_hdr *hdr)
2011 {
2012         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2013         encode_nfs4_stateid(xdr, args->stateid);
2014 }
2015 #endif /* CONFIG_NFS_V4_1 */
2016
2017 /*
2018  * END OF "GENERIC" ENCODE ROUTINES.
2019  */
2020
2021 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2022 {
2023 #if defined(CONFIG_NFS_V4_1)
2024
2025         if (args->sa_slot)
2026                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2027 #endif /* CONFIG_NFS_V4_1 */
2028         return 0;
2029 }
2030
2031 /*
2032  * Encode an ACCESS request
2033  */
2034 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2035                                 const struct nfs4_accessargs *args)
2036 {
2037         struct compound_hdr hdr = {
2038                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2039         };
2040
2041         encode_compound_hdr(xdr, req, &hdr);
2042         encode_sequence(xdr, &args->seq_args, &hdr);
2043         encode_putfh(xdr, args->fh, &hdr);
2044         encode_access(xdr, args->access, &hdr);
2045         encode_getfattr(xdr, args->bitmask, &hdr);
2046         encode_nops(&hdr);
2047 }
2048
2049 /*
2050  * Encode LOOKUP request
2051  */
2052 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2053                                 const struct nfs4_lookup_arg *args)
2054 {
2055         struct compound_hdr hdr = {
2056                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2057         };
2058
2059         encode_compound_hdr(xdr, req, &hdr);
2060         encode_sequence(xdr, &args->seq_args, &hdr);
2061         encode_putfh(xdr, args->dir_fh, &hdr);
2062         encode_lookup(xdr, args->name, &hdr);
2063         encode_getfh(xdr, &hdr);
2064         encode_getfattr(xdr, args->bitmask, &hdr);
2065         encode_nops(&hdr);
2066 }
2067
2068 /*
2069  * Encode LOOKUP_ROOT request
2070  */
2071 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2072                                      struct xdr_stream *xdr,
2073                                      const struct nfs4_lookup_root_arg *args)
2074 {
2075         struct compound_hdr hdr = {
2076                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2077         };
2078
2079         encode_compound_hdr(xdr, req, &hdr);
2080         encode_sequence(xdr, &args->seq_args, &hdr);
2081         encode_putrootfh(xdr, &hdr);
2082         encode_getfh(xdr, &hdr);
2083         encode_getfattr(xdr, args->bitmask, &hdr);
2084         encode_nops(&hdr);
2085 }
2086
2087 /*
2088  * Encode REMOVE request
2089  */
2090 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2091                                 const struct nfs_removeargs *args)
2092 {
2093         struct compound_hdr hdr = {
2094                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2095         };
2096
2097         encode_compound_hdr(xdr, req, &hdr);
2098         encode_sequence(xdr, &args->seq_args, &hdr);
2099         encode_putfh(xdr, args->fh, &hdr);
2100         encode_remove(xdr, &args->name, &hdr);
2101         encode_nops(&hdr);
2102 }
2103
2104 /*
2105  * Encode RENAME request
2106  */
2107 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2108                                 const struct nfs_renameargs *args)
2109 {
2110         struct compound_hdr hdr = {
2111                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2112         };
2113
2114         encode_compound_hdr(xdr, req, &hdr);
2115         encode_sequence(xdr, &args->seq_args, &hdr);
2116         encode_putfh(xdr, args->old_dir, &hdr);
2117         encode_savefh(xdr, &hdr);
2118         encode_putfh(xdr, args->new_dir, &hdr);
2119         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2120         encode_nops(&hdr);
2121 }
2122
2123 /*
2124  * Encode LINK request
2125  */
2126 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2127                              const struct nfs4_link_arg *args)
2128 {
2129         struct compound_hdr hdr = {
2130                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2131         };
2132
2133         encode_compound_hdr(xdr, req, &hdr);
2134         encode_sequence(xdr, &args->seq_args, &hdr);
2135         encode_putfh(xdr, args->fh, &hdr);
2136         encode_savefh(xdr, &hdr);
2137         encode_putfh(xdr, args->dir_fh, &hdr);
2138         encode_link(xdr, args->name, &hdr);
2139         encode_restorefh(xdr, &hdr);
2140         encode_getfattr(xdr, args->bitmask, &hdr);
2141         encode_nops(&hdr);
2142 }
2143
2144 /*
2145  * Encode CREATE request
2146  */
2147 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2148                                 const struct nfs4_create_arg *args)
2149 {
2150         struct compound_hdr hdr = {
2151                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152         };
2153
2154         encode_compound_hdr(xdr, req, &hdr);
2155         encode_sequence(xdr, &args->seq_args, &hdr);
2156         encode_putfh(xdr, args->dir_fh, &hdr);
2157         encode_create(xdr, args, &hdr);
2158         encode_getfh(xdr, &hdr);
2159         encode_getfattr(xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode SYMLINK request
2165  */
2166 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                  const struct nfs4_create_arg *args)
2168 {
2169         nfs4_xdr_enc_create(req, xdr, args);
2170 }
2171
2172 /*
2173  * Encode GETATTR request
2174  */
2175 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2176                                  const struct nfs4_getattr_arg *args)
2177 {
2178         struct compound_hdr hdr = {
2179                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180         };
2181
2182         encode_compound_hdr(xdr, req, &hdr);
2183         encode_sequence(xdr, &args->seq_args, &hdr);
2184         encode_putfh(xdr, args->fh, &hdr);
2185         encode_getfattr(xdr, args->bitmask, &hdr);
2186         encode_nops(&hdr);
2187 }
2188
2189 /*
2190  * Encode a CLOSE request
2191  */
2192 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2193                                struct nfs_closeargs *args)
2194 {
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         encode_compound_hdr(xdr, req, &hdr);
2200         encode_sequence(xdr, &args->seq_args, &hdr);
2201         encode_putfh(xdr, args->fh, &hdr);
2202         encode_close(xdr, args, &hdr);
2203         encode_getfattr(xdr, args->bitmask, &hdr);
2204         encode_nops(&hdr);
2205 }
2206
2207 /*
2208  * Encode an OPEN request
2209  */
2210 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                               struct nfs_openargs *args)
2212 {
2213         struct compound_hdr hdr = {
2214                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2215         };
2216
2217         encode_compound_hdr(xdr, req, &hdr);
2218         encode_sequence(xdr, &args->seq_args, &hdr);
2219         encode_putfh(xdr, args->fh, &hdr);
2220         encode_open(xdr, args, &hdr);
2221         encode_getfh(xdr, &hdr);
2222         if (args->access)
2223                 encode_access(xdr, args->access, &hdr);
2224         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2225         encode_nops(&hdr);
2226 }
2227
2228 /*
2229  * Encode an OPEN_CONFIRM request
2230  */
2231 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2232                                       struct xdr_stream *xdr,
2233                                       struct nfs_open_confirmargs *args)
2234 {
2235         struct compound_hdr hdr = {
2236                 .nops   = 0,
2237         };
2238
2239         encode_compound_hdr(xdr, req, &hdr);
2240         encode_putfh(xdr, args->fh, &hdr);
2241         encode_open_confirm(xdr, args, &hdr);
2242         encode_nops(&hdr);
2243 }
2244
2245 /*
2246  * Encode an OPEN request with no attributes.
2247  */
2248 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2249                                      struct xdr_stream *xdr,
2250                                      struct nfs_openargs *args)
2251 {
2252         struct compound_hdr hdr = {
2253                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2254         };
2255
2256         encode_compound_hdr(xdr, req, &hdr);
2257         encode_sequence(xdr, &args->seq_args, &hdr);
2258         encode_putfh(xdr, args->fh, &hdr);
2259         encode_open(xdr, args, &hdr);
2260         if (args->access)
2261                 encode_access(xdr, args->access, &hdr);
2262         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2263         encode_nops(&hdr);
2264 }
2265
2266 /*
2267  * Encode an OPEN_DOWNGRADE request
2268  */
2269 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2270                                         struct xdr_stream *xdr,
2271                                         struct nfs_closeargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_open_downgrade(xdr, args, &hdr);
2281         encode_getfattr(xdr, args->bitmask, &hdr);
2282         encode_nops(&hdr);
2283 }
2284
2285 /*
2286  * Encode a LOCK request
2287  */
2288 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2289                               struct nfs_lock_args *args)
2290 {
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         encode_compound_hdr(xdr, req, &hdr);
2296         encode_sequence(xdr, &args->seq_args, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_lock(xdr, args, &hdr);
2299         encode_nops(&hdr);
2300 }
2301
2302 /*
2303  * Encode a LOCKT request
2304  */
2305 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2306                                struct nfs_lockt_args *args)
2307 {
2308         struct compound_hdr hdr = {
2309                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310         };
2311
2312         encode_compound_hdr(xdr, req, &hdr);
2313         encode_sequence(xdr, &args->seq_args, &hdr);
2314         encode_putfh(xdr, args->fh, &hdr);
2315         encode_lockt(xdr, args, &hdr);
2316         encode_nops(&hdr);
2317 }
2318
2319 /*
2320  * Encode a LOCKU request
2321  */
2322 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2323                                struct nfs_locku_args *args)
2324 {
2325         struct compound_hdr hdr = {
2326                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2327         };
2328
2329         encode_compound_hdr(xdr, req, &hdr);
2330         encode_sequence(xdr, &args->seq_args, &hdr);
2331         encode_putfh(xdr, args->fh, &hdr);
2332         encode_locku(xdr, args, &hdr);
2333         encode_nops(&hdr);
2334 }
2335
2336 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2337                                            struct xdr_stream *xdr,
2338                                         struct nfs_release_lockowner_args *args)
2339 {
2340         struct compound_hdr hdr = {
2341                 .minorversion = 0,
2342         };
2343
2344         encode_compound_hdr(xdr, req, &hdr);
2345         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2346         encode_nops(&hdr);
2347 }
2348
2349 /*
2350  * Encode a READLINK request
2351  */
2352 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2353                                   const struct nfs4_readlink *args)
2354 {
2355         struct compound_hdr hdr = {
2356                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2357         };
2358
2359         encode_compound_hdr(xdr, req, &hdr);
2360         encode_sequence(xdr, &args->seq_args, &hdr);
2361         encode_putfh(xdr, args->fh, &hdr);
2362         encode_readlink(xdr, args, req, &hdr);
2363
2364         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2365                         args->pgbase, args->pglen);
2366         encode_nops(&hdr);
2367 }
2368
2369 /*
2370  * Encode a READDIR request
2371  */
2372 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2373                                  const struct nfs4_readdir_arg *args)
2374 {
2375         struct compound_hdr hdr = {
2376                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2377         };
2378
2379         encode_compound_hdr(xdr, req, &hdr);
2380         encode_sequence(xdr, &args->seq_args, &hdr);
2381         encode_putfh(xdr, args->fh, &hdr);
2382         encode_readdir(xdr, args, req, &hdr);
2383
2384         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2385                          args->pgbase, args->count);
2386         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2387                         __func__, hdr.replen << 2, args->pages,
2388                         args->pgbase, args->count);
2389         encode_nops(&hdr);
2390 }
2391
2392 /*
2393  * Encode a READ request
2394  */
2395 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2396                               struct nfs_readargs *args)
2397 {
2398         struct compound_hdr hdr = {
2399                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2400         };
2401
2402         encode_compound_hdr(xdr, req, &hdr);
2403         encode_sequence(xdr, &args->seq_args, &hdr);
2404         encode_putfh(xdr, args->fh, &hdr);
2405         encode_read(xdr, args, &hdr);
2406
2407         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2408                          args->pages, args->pgbase, args->count);
2409         req->rq_rcv_buf.flags |= XDRBUF_READ;
2410         encode_nops(&hdr);
2411 }
2412
2413 /*
2414  * Encode an SETATTR request
2415  */
2416 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2417                                  struct nfs_setattrargs *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_setattr(xdr, args, args->server, &hdr);
2427         encode_getfattr(xdr, args->bitmask, &hdr);
2428         encode_nops(&hdr);
2429 }
2430
2431 /*
2432  * Encode a GETACL request
2433  */
2434 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                 struct nfs_getaclargs *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440         uint32_t replen;
2441
2442         encode_compound_hdr(xdr, req, &hdr);
2443         encode_sequence(xdr, &args->seq_args, &hdr);
2444         encode_putfh(xdr, args->fh, &hdr);
2445         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2446         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2447
2448         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2449                 args->acl_pages, args->acl_pgbase, args->acl_len);
2450
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode a WRITE request
2456  */
2457 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                                struct nfs_writeargs *args)
2459 {
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_write(xdr, args, &hdr);
2468         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2469         if (args->bitmask)
2470                 encode_getfattr(xdr, args->bitmask, &hdr);
2471         encode_nops(&hdr);
2472 }
2473
2474 /*
2475  *  a COMMIT request
2476  */
2477 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2478                                 struct nfs_commitargs *args)
2479 {
2480         struct compound_hdr hdr = {
2481                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482         };
2483
2484         encode_compound_hdr(xdr, req, &hdr);
2485         encode_sequence(xdr, &args->seq_args, &hdr);
2486         encode_putfh(xdr, args->fh, &hdr);
2487         encode_commit(xdr, args, &hdr);
2488         encode_nops(&hdr);
2489 }
2490
2491 /*
2492  * FSINFO request
2493  */
2494 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2495                                 struct nfs4_fsinfo_arg *args)
2496 {
2497         struct compound_hdr hdr = {
2498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499         };
2500
2501         encode_compound_hdr(xdr, req, &hdr);
2502         encode_sequence(xdr, &args->seq_args, &hdr);
2503         encode_putfh(xdr, args->fh, &hdr);
2504         encode_fsinfo(xdr, args->bitmask, &hdr);
2505         encode_nops(&hdr);
2506 }
2507
2508 /*
2509  * a PATHCONF request
2510  */
2511 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2512                                   const struct nfs4_pathconf_arg *args)
2513 {
2514         struct compound_hdr hdr = {
2515                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516         };
2517
2518         encode_compound_hdr(xdr, req, &hdr);
2519         encode_sequence(xdr, &args->seq_args, &hdr);
2520         encode_putfh(xdr, args->fh, &hdr);
2521         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2522                            &hdr);
2523         encode_nops(&hdr);
2524 }
2525
2526 /*
2527  * a STATFS request
2528  */
2529 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2530                                 const struct nfs4_statfs_arg *args)
2531 {
2532         struct compound_hdr hdr = {
2533                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2534         };
2535
2536         encode_compound_hdr(xdr, req, &hdr);
2537         encode_sequence(xdr, &args->seq_args, &hdr);
2538         encode_putfh(xdr, args->fh, &hdr);
2539         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2540                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2541         encode_nops(&hdr);
2542 }
2543
2544 /*
2545  * GETATTR_BITMAP request
2546  */
2547 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2548                                      struct xdr_stream *xdr,
2549                                      struct nfs4_server_caps_arg *args)
2550 {
2551         struct compound_hdr hdr = {
2552                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2553         };
2554
2555         encode_compound_hdr(xdr, req, &hdr);
2556         encode_sequence(xdr, &args->seq_args, &hdr);
2557         encode_putfh(xdr, args->fhandle, &hdr);
2558         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2559                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2560                            FATTR4_WORD0_LINK_SUPPORT|
2561                            FATTR4_WORD0_SYMLINK_SUPPORT|
2562                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2563         encode_nops(&hdr);
2564 }
2565
2566 /*
2567  * a RENEW request
2568  */
2569 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2570                                struct nfs_client *clp)
2571 {
2572         struct compound_hdr hdr = {
2573                 .nops   = 0,
2574         };
2575
2576         encode_compound_hdr(xdr, req, &hdr);
2577         encode_renew(xdr, clp->cl_clientid, &hdr);
2578         encode_nops(&hdr);
2579 }
2580
2581 /*
2582  * a SETCLIENTID request
2583  */
2584 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2585                                      struct xdr_stream *xdr,
2586                                      struct nfs4_setclientid *sc)
2587 {
2588         struct compound_hdr hdr = {
2589                 .nops   = 0,
2590         };
2591
2592         encode_compound_hdr(xdr, req, &hdr);
2593         encode_setclientid(xdr, sc, &hdr);
2594         encode_nops(&hdr);
2595 }
2596
2597 /*
2598  * a SETCLIENTID_CONFIRM request
2599  */
2600 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2601                                              struct xdr_stream *xdr,
2602                                              struct nfs4_setclientid_res *arg)
2603 {
2604         struct compound_hdr hdr = {
2605                 .nops   = 0,
2606         };
2607
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_setclientid_confirm(xdr, arg, &hdr);
2610         encode_nops(&hdr);
2611 }
2612
2613 /*
2614  * DELEGRETURN request
2615  */
2616 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2617                                      struct xdr_stream *xdr,
2618                                      const struct nfs4_delegreturnargs *args)
2619 {
2620         struct compound_hdr hdr = {
2621                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2622         };
2623
2624         encode_compound_hdr(xdr, req, &hdr);
2625         encode_sequence(xdr, &args->seq_args, &hdr);
2626         encode_putfh(xdr, args->fhandle, &hdr);
2627         encode_getfattr(xdr, args->bitmask, &hdr);
2628         encode_delegreturn(xdr, args->stateid, &hdr);
2629         encode_nops(&hdr);
2630 }
2631
2632 /*
2633  * Encode FS_LOCATIONS request
2634  */
2635 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2636                                       struct xdr_stream *xdr,
2637                                       struct nfs4_fs_locations_arg *args)
2638 {
2639         struct compound_hdr hdr = {
2640                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2641         };
2642         uint32_t replen;
2643
2644         encode_compound_hdr(xdr, req, &hdr);
2645         encode_sequence(xdr, &args->seq_args, &hdr);
2646         encode_putfh(xdr, args->dir_fh, &hdr);
2647         encode_lookup(xdr, args->name, &hdr);
2648         replen = hdr.replen;    /* get the attribute into args->page */
2649         encode_fs_locations(xdr, args->bitmask, &hdr);
2650
2651         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2652                         0, PAGE_SIZE);
2653         encode_nops(&hdr);
2654 }
2655
2656 /*
2657  * Encode SECINFO request
2658  */
2659 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2660                                 struct xdr_stream *xdr,
2661                                 struct nfs4_secinfo_arg *args)
2662 {
2663         struct compound_hdr hdr = {
2664                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2665         };
2666
2667         encode_compound_hdr(xdr, req, &hdr);
2668         encode_sequence(xdr, &args->seq_args, &hdr);
2669         encode_putfh(xdr, args->dir_fh, &hdr);
2670         encode_secinfo(xdr, args->name, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 #if defined(CONFIG_NFS_V4_1)
2675 /*
2676  * BIND_CONN_TO_SESSION request
2677  */
2678 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2679                                 struct xdr_stream *xdr,
2680                                 struct nfs_client *clp)
2681 {
2682         struct compound_hdr hdr = {
2683                 .minorversion = clp->cl_mvops->minor_version,
2684         };
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2688         encode_nops(&hdr);
2689 }
2690
2691 /*
2692  * EXCHANGE_ID request
2693  */
2694 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2695                                      struct xdr_stream *xdr,
2696                                      struct nfs41_exchange_id_args *args)
2697 {
2698         struct compound_hdr hdr = {
2699                 .minorversion = args->client->cl_mvops->minor_version,
2700         };
2701
2702         encode_compound_hdr(xdr, req, &hdr);
2703         encode_exchange_id(xdr, args, &hdr);
2704         encode_nops(&hdr);
2705 }
2706
2707 /*
2708  * a CREATE_SESSION request
2709  */
2710 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2711                                         struct xdr_stream *xdr,
2712                                         struct nfs41_create_session_args *args)
2713 {
2714         struct compound_hdr hdr = {
2715                 .minorversion = args->client->cl_mvops->minor_version,
2716         };
2717
2718         encode_compound_hdr(xdr, req, &hdr);
2719         encode_create_session(xdr, args, &hdr);
2720         encode_nops(&hdr);
2721 }
2722
2723 /*
2724  * a DESTROY_SESSION request
2725  */
2726 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2727                                          struct xdr_stream *xdr,
2728                                          struct nfs4_session *session)
2729 {
2730         struct compound_hdr hdr = {
2731                 .minorversion = session->clp->cl_mvops->minor_version,
2732         };
2733
2734         encode_compound_hdr(xdr, req, &hdr);
2735         encode_destroy_session(xdr, session, &hdr);
2736         encode_nops(&hdr);
2737 }
2738
2739 /*
2740  * a DESTROY_CLIENTID request
2741  */
2742 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2743                                          struct xdr_stream *xdr,
2744                                          struct nfs_client *clp)
2745 {
2746         struct compound_hdr hdr = {
2747                 .minorversion = clp->cl_mvops->minor_version,
2748         };
2749
2750         encode_compound_hdr(xdr, req, &hdr);
2751         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2752         encode_nops(&hdr);
2753 }
2754
2755 /*
2756  * a SEQUENCE request
2757  */
2758 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2759                                   struct nfs4_sequence_args *args)
2760 {
2761         struct compound_hdr hdr = {
2762                 .minorversion = nfs4_xdr_minorversion(args),
2763         };
2764
2765         encode_compound_hdr(xdr, req, &hdr);
2766         encode_sequence(xdr, args, &hdr);
2767         encode_nops(&hdr);
2768 }
2769
2770 /*
2771  * a GET_LEASE_TIME request
2772  */
2773 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2774                                         struct xdr_stream *xdr,
2775                                         struct nfs4_get_lease_time_args *args)
2776 {
2777         struct compound_hdr hdr = {
2778                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2779         };
2780         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2781
2782         encode_compound_hdr(xdr, req, &hdr);
2783         encode_sequence(xdr, &args->la_seq_args, &hdr);
2784         encode_putrootfh(xdr, &hdr);
2785         encode_fsinfo(xdr, lease_bitmap, &hdr);
2786         encode_nops(&hdr);
2787 }
2788
2789 /*
2790  * a RECLAIM_COMPLETE request
2791  */
2792 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2793                                           struct xdr_stream *xdr,
2794                                 struct nfs41_reclaim_complete_args *args)
2795 {
2796         struct compound_hdr hdr = {
2797                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2798         };
2799
2800         encode_compound_hdr(xdr, req, &hdr);
2801         encode_sequence(xdr, &args->seq_args, &hdr);
2802         encode_reclaim_complete(xdr, args, &hdr);
2803         encode_nops(&hdr);
2804 }
2805
2806 /*
2807  * Encode GETDEVICELIST request
2808  */
2809 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2810                                        struct xdr_stream *xdr,
2811                                        struct nfs4_getdevicelist_args *args)
2812 {
2813         struct compound_hdr hdr = {
2814                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2815         };
2816
2817         encode_compound_hdr(xdr, req, &hdr);
2818         encode_sequence(xdr, &args->seq_args, &hdr);
2819         encode_putfh(xdr, args->fh, &hdr);
2820         encode_getdevicelist(xdr, args, &hdr);
2821         encode_nops(&hdr);
2822 }
2823
2824 /*
2825  * Encode GETDEVICEINFO request
2826  */
2827 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2828                                        struct xdr_stream *xdr,
2829                                        struct nfs4_getdeviceinfo_args *args)
2830 {
2831         struct compound_hdr hdr = {
2832                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2833         };
2834
2835         encode_compound_hdr(xdr, req, &hdr);
2836         encode_sequence(xdr, &args->seq_args, &hdr);
2837         encode_getdeviceinfo(xdr, args, &hdr);
2838
2839         /* set up reply kvec. Subtract notification bitmap max size (2)
2840          * so that notification bitmap is put in xdr_buf tail */
2841         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2842                          args->pdev->pages, args->pdev->pgbase,
2843                          args->pdev->pglen);
2844
2845         encode_nops(&hdr);
2846 }
2847
2848 /*
2849  *  Encode LAYOUTGET request
2850  */
2851 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2852                                    struct xdr_stream *xdr,
2853                                    struct nfs4_layoutget_args *args)
2854 {
2855         struct compound_hdr hdr = {
2856                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2857         };
2858
2859         encode_compound_hdr(xdr, req, &hdr);
2860         encode_sequence(xdr, &args->seq_args, &hdr);
2861         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2862         encode_layoutget(xdr, args, &hdr);
2863
2864         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2865             args->layout.pages, 0, args->layout.pglen);
2866
2867         encode_nops(&hdr);
2868 }
2869
2870 /*
2871  *  Encode LAYOUTCOMMIT request
2872  */
2873 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2874                                       struct xdr_stream *xdr,
2875                                       struct nfs4_layoutcommit_args *args)
2876 {
2877         struct nfs4_layoutcommit_data *data =
2878                 container_of(args, struct nfs4_layoutcommit_data, args);
2879         struct compound_hdr hdr = {
2880                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2881         };
2882
2883         encode_compound_hdr(xdr, req, &hdr);
2884         encode_sequence(xdr, &args->seq_args, &hdr);
2885         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2886         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2887         encode_getfattr(xdr, args->bitmask, &hdr);
2888         encode_nops(&hdr);
2889 }
2890
2891 /*
2892  * Encode LAYOUTRETURN request
2893  */
2894 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2895                                       struct xdr_stream *xdr,
2896                                       struct nfs4_layoutreturn_args *args)
2897 {
2898         struct compound_hdr hdr = {
2899                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2900         };
2901
2902         encode_compound_hdr(xdr, req, &hdr);
2903         encode_sequence(xdr, &args->seq_args, &hdr);
2904         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2905         encode_layoutreturn(xdr, args, &hdr);
2906         encode_nops(&hdr);
2907 }
2908
2909 /*
2910  * Encode SECINFO_NO_NAME request
2911  */
2912 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2913                                         struct xdr_stream *xdr,
2914                                         struct nfs41_secinfo_no_name_args *args)
2915 {
2916         struct compound_hdr hdr = {
2917                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2918         };
2919
2920         encode_compound_hdr(xdr, req, &hdr);
2921         encode_sequence(xdr, &args->seq_args, &hdr);
2922         encode_putrootfh(xdr, &hdr);
2923         encode_secinfo_no_name(xdr, args, &hdr);
2924         encode_nops(&hdr);
2925         return 0;
2926 }
2927
2928 /*
2929  *  Encode TEST_STATEID request
2930  */
2931 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2932                                       struct xdr_stream *xdr,
2933                                       struct nfs41_test_stateid_args *args)
2934 {
2935         struct compound_hdr hdr = {
2936                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2937         };
2938
2939         encode_compound_hdr(xdr, req, &hdr);
2940         encode_sequence(xdr, &args->seq_args, &hdr);
2941         encode_test_stateid(xdr, args, &hdr);
2942         encode_nops(&hdr);
2943 }
2944
2945 /*
2946  *  Encode FREE_STATEID request
2947  */
2948 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2949                                      struct xdr_stream *xdr,
2950                                      struct nfs41_free_stateid_args *args)
2951 {
2952         struct compound_hdr hdr = {
2953                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2954         };
2955
2956         encode_compound_hdr(xdr, req, &hdr);
2957         encode_sequence(xdr, &args->seq_args, &hdr);
2958         encode_free_stateid(xdr, args, &hdr);
2959         encode_nops(&hdr);
2960 }
2961 #endif /* CONFIG_NFS_V4_1 */
2962
2963 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2964 {
2965         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2966                 "Remaining buffer length is %tu words.\n",
2967                 func, xdr->end - xdr->p);
2968 }
2969
2970 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2971 {
2972         __be32 *p;
2973
2974         p = xdr_inline_decode(xdr, 4);
2975         if (unlikely(!p))
2976                 goto out_overflow;
2977         *len = be32_to_cpup(p);
2978         p = xdr_inline_decode(xdr, *len);
2979         if (unlikely(!p))
2980                 goto out_overflow;
2981         *string = (char *)p;
2982         return 0;
2983 out_overflow:
2984         print_overflow_msg(__func__, xdr);
2985         return -EIO;
2986 }
2987
2988 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2989 {
2990         __be32 *p;
2991
2992         p = xdr_inline_decode(xdr, 8);
2993         if (unlikely(!p))
2994                 goto out_overflow;
2995         hdr->status = be32_to_cpup(p++);
2996         hdr->taglen = be32_to_cpup(p);
2997
2998         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2999         if (unlikely(!p))
3000                 goto out_overflow;
3001         hdr->tag = (char *)p;
3002         p += XDR_QUADLEN(hdr->taglen);
3003         hdr->nops = be32_to_cpup(p);
3004         if (unlikely(hdr->nops < 1))
3005                 return nfs4_stat_to_errno(hdr->status);
3006         return 0;
3007 out_overflow:
3008         print_overflow_msg(__func__, xdr);
3009         return -EIO;
3010 }
3011
3012 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3013 {
3014         __be32 *p;
3015         uint32_t opnum;
3016         int32_t nfserr;
3017
3018         p = xdr_inline_decode(xdr, 8);
3019         if (unlikely(!p))
3020                 goto out_overflow;
3021         opnum = be32_to_cpup(p++);
3022         if (opnum != expected) {
3023                 dprintk("nfs: Server returned operation"
3024                         " %d but we issued a request for %d\n",
3025                                 opnum, expected);
3026                 return -EIO;
3027         }
3028         nfserr = be32_to_cpup(p);
3029         if (nfserr != NFS_OK)
3030                 return nfs4_stat_to_errno(nfserr);
3031         return 0;
3032 out_overflow:
3033         print_overflow_msg(__func__, xdr);
3034         return -EIO;
3035 }
3036
3037 /* Dummy routine */
3038 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3039 {
3040         __be32 *p;
3041         unsigned int strlen;
3042         char *str;
3043
3044         p = xdr_inline_decode(xdr, 12);
3045         if (likely(p))
3046                 return decode_opaque_inline(xdr, &strlen, &str);
3047         print_overflow_msg(__func__, xdr);
3048         return -EIO;
3049 }
3050
3051 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3052 {
3053         uint32_t bmlen;
3054         __be32 *p;
3055
3056         p = xdr_inline_decode(xdr, 4);
3057         if (unlikely(!p))
3058                 goto out_overflow;
3059         bmlen = be32_to_cpup(p);
3060
3061         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3062         p = xdr_inline_decode(xdr, (bmlen << 2));
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         if (bmlen > 0) {
3066                 bitmap[0] = be32_to_cpup(p++);
3067                 if (bmlen > 1) {
3068                         bitmap[1] = be32_to_cpup(p++);
3069                         if (bmlen > 2)
3070                                 bitmap[2] = be32_to_cpup(p);
3071                 }
3072         }
3073         return 0;
3074 out_overflow:
3075         print_overflow_msg(__func__, xdr);
3076         return -EIO;
3077 }
3078
3079 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3080 {
3081         __be32 *p;
3082
3083         p = xdr_inline_decode(xdr, 4);
3084         if (unlikely(!p))
3085                 goto out_overflow;
3086         *attrlen = be32_to_cpup(p);
3087         *savep = xdr_stream_pos(xdr);
3088         return 0;
3089 out_overflow:
3090         print_overflow_msg(__func__, xdr);
3091         return -EIO;
3092 }
3093
3094 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3095 {
3096         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3097                 int ret;
3098                 ret = decode_attr_bitmap(xdr, bitmask);
3099                 if (unlikely(ret < 0))
3100                         return ret;
3101                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3102         } else
3103                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3104         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3105                 bitmask[0], bitmask[1], bitmask[2]);
3106         return 0;
3107 }
3108
3109 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3110 {
3111         __be32 *p;
3112         int ret = 0;
3113
3114         *type = 0;
3115         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3116                 return -EIO;
3117         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3118                 p = xdr_inline_decode(xdr, 4);
3119                 if (unlikely(!p))
3120                         goto out_overflow;
3121                 *type = be32_to_cpup(p);
3122                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3123                         dprintk("%s: bad type %d\n", __func__, *type);
3124                         return -EIO;
3125                 }
3126                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3127                 ret = NFS_ATTR_FATTR_TYPE;
3128         }
3129         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3130         return ret;
3131 out_overflow:
3132         print_overflow_msg(__func__, xdr);
3133         return -EIO;
3134 }
3135
3136 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3137                                       uint32_t *bitmap, uint32_t *type)
3138 {
3139         __be32 *p;
3140
3141         *type = 0;
3142         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3143                 return -EIO;
3144         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3145                 p = xdr_inline_decode(xdr, 4);
3146                 if (unlikely(!p))
3147                         goto out_overflow;
3148                 *type = be32_to_cpup(p);
3149                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3150         }
3151         dprintk("%s: expire type=0x%x\n", __func__, *type);
3152         return 0;
3153 out_overflow:
3154         print_overflow_msg(__func__, xdr);
3155         return -EIO;
3156 }
3157
3158 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3159 {
3160         __be32 *p;
3161         int ret = 0;
3162
3163         *change = 0;
3164         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3165                 return -EIO;
3166         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3167                 p = xdr_inline_decode(xdr, 8);
3168                 if (unlikely(!p))
3169                         goto out_overflow;
3170                 xdr_decode_hyper(p, change);
3171                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3172                 ret = NFS_ATTR_FATTR_CHANGE;
3173         }
3174         dprintk("%s: change attribute=%Lu\n", __func__,
3175                         (unsigned long long)*change);
3176         return ret;
3177 out_overflow:
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3183 {
3184         __be32 *p;
3185         int ret = 0;
3186
3187         *size = 0;
3188         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3189                 return -EIO;
3190         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3191                 p = xdr_inline_decode(xdr, 8);
3192                 if (unlikely(!p))
3193                         goto out_overflow;
3194                 xdr_decode_hyper(p, size);
3195                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3196                 ret = NFS_ATTR_FATTR_SIZE;
3197         }
3198         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3199         return ret;
3200 out_overflow:
3201         print_overflow_msg(__func__, xdr);
3202         return -EIO;
3203 }
3204
3205 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3206 {
3207         __be32 *p;
3208
3209         *res = 0;
3210         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3211                 return -EIO;
3212         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3213                 p = xdr_inline_decode(xdr, 4);
3214                 if (unlikely(!p))
3215                         goto out_overflow;
3216                 *res = be32_to_cpup(p);
3217                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3218         }
3219         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3220         return 0;
3221 out_overflow:
3222         print_overflow_msg(__func__, xdr);
3223         return -EIO;
3224 }
3225
3226 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3227 {
3228         __be32 *p;
3229
3230         *res = 0;
3231         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3232                 return -EIO;
3233         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3234                 p = xdr_inline_decode(xdr, 4);
3235                 if (unlikely(!p))
3236                         goto out_overflow;
3237                 *res = be32_to_cpup(p);
3238                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3239         }
3240         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3241         return 0;
3242 out_overflow:
3243         print_overflow_msg(__func__, xdr);
3244         return -EIO;
3245 }
3246
3247 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3248 {
3249         __be32 *p;
3250         int ret = 0;
3251
3252         fsid->major = 0;
3253         fsid->minor = 0;
3254         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3255                 return -EIO;
3256         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3257                 p = xdr_inline_decode(xdr, 16);
3258                 if (unlikely(!p))
3259                         goto out_overflow;
3260                 p = xdr_decode_hyper(p, &fsid->major);
3261                 xdr_decode_hyper(p, &fsid->minor);
3262                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3263                 ret = NFS_ATTR_FATTR_FSID;
3264         }
3265         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3266                         (unsigned long long)fsid->major,
3267                         (unsigned long long)fsid->minor);
3268         return ret;
3269 out_overflow:
3270         print_overflow_msg(__func__, xdr);
3271         return -EIO;
3272 }
3273
3274 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3275 {
3276         __be32 *p;
3277
3278         *res = 60;
3279         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3280                 return -EIO;
3281         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3282                 p = xdr_inline_decode(xdr, 4);
3283                 if (unlikely(!p))
3284                         goto out_overflow;
3285                 *res = be32_to_cpup(p);
3286                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3287         }
3288         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3289         return 0;
3290 out_overflow:
3291         print_overflow_msg(__func__, xdr);
3292         return -EIO;
3293 }
3294
3295 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3296 {
3297         __be32 *p;
3298
3299         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3300                 return -EIO;
3301         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3302                 p = xdr_inline_decode(xdr, 4);
3303                 if (unlikely(!p))
3304                         goto out_overflow;
3305                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3306                 *res = -be32_to_cpup(p);
3307         }
3308         return 0;
3309 out_overflow:
3310         print_overflow_msg(__func__, xdr);
3311         return -EIO;
3312 }
3313
3314 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3315 {
3316         __be32 *p;
3317         int len;
3318
3319         if (fh != NULL)
3320                 memset(fh, 0, sizeof(*fh));
3321
3322         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3323                 return -EIO;
3324         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3325                 p = xdr_inline_decode(xdr, 4);
3326                 if (unlikely(!p))
3327                         goto out_overflow;
3328                 len = be32_to_cpup(p);
3329                 if (len > NFS4_FHSIZE)
3330                         return -EIO;
3331                 p = xdr_inline_decode(xdr, len);
3332                 if (unlikely(!p))
3333                         goto out_overflow;
3334                 if (fh != NULL) {
3335                         memcpy(fh->data, p, len);
3336                         fh->size = len;
3337                 }
3338                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3339         }
3340         return 0;
3341 out_overflow:
3342         print_overflow_msg(__func__, xdr);
3343         return -EIO;
3344 }
3345
3346 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3347 {
3348         __be32 *p;
3349
3350         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3351         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3352                 return -EIO;
3353         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3354                 p = xdr_inline_decode(xdr, 4);
3355                 if (unlikely(!p))
3356                         goto out_overflow;
3357                 *res = be32_to_cpup(p);
3358                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3359         }
3360         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3361         return 0;
3362 out_overflow:
3363         print_overflow_msg(__func__, xdr);
3364         return -EIO;
3365 }
3366
3367 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3368 {
3369         __be32 *p;
3370         int ret = 0;
3371
3372         *fileid = 0;
3373         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3374                 return -EIO;
3375         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3376                 p = xdr_inline_decode(xdr, 8);
3377                 if (unlikely(!p))
3378                         goto out_overflow;
3379                 xdr_decode_hyper(p, fileid);
3380                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3381                 ret = NFS_ATTR_FATTR_FILEID;
3382         }
3383         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3384         return ret;
3385 out_overflow:
3386         print_overflow_msg(__func__, xdr);
3387         return -EIO;
3388 }
3389
3390 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3391 {
3392         __be32 *p;
3393         int ret = 0;
3394
3395         *fileid = 0;
3396         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3397                 return -EIO;
3398         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3399                 p = xdr_inline_decode(xdr, 8);
3400                 if (unlikely(!p))
3401                         goto out_overflow;
3402                 xdr_decode_hyper(p, fileid);
3403                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3404                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3405         }
3406         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3407         return ret;
3408 out_overflow:
3409         print_overflow_msg(__func__, xdr);
3410         return -EIO;
3411 }
3412
3413 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3414 {
3415         __be32 *p;
3416         int status = 0;
3417
3418         *res = 0;
3419         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3420                 return -EIO;
3421         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3422                 p = xdr_inline_decode(xdr, 8);
3423                 if (unlikely(!p))
3424                         goto out_overflow;
3425                 xdr_decode_hyper(p, res);
3426                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3427         }
3428         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3429         return status;
3430 out_overflow:
3431         print_overflow_msg(__func__, xdr);
3432         return -EIO;
3433 }
3434
3435 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3436 {
3437         __be32 *p;
3438         int status = 0;
3439
3440         *res = 0;
3441         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3442                 return -EIO;
3443         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3444                 p = xdr_inline_decode(xdr, 8);
3445                 if (unlikely(!p))
3446                         goto out_overflow;
3447                 xdr_decode_hyper(p, res);
3448                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3449         }
3450         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3451         return status;
3452 out_overflow:
3453         print_overflow_msg(__func__, xdr);
3454         return -EIO;
3455 }
3456
3457 static int decode_attr_files_total(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_TOTAL - 1U)))
3464                 return -EIO;
3465         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
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_TOTAL;
3471         }
3472         dprintk("%s: files total=%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_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3480 {
3481         u32 n;
3482         __be32 *p;
3483         int status = 0;
3484
3485         p = xdr_inline_decode(xdr, 4);
3486         if (unlikely(!p))
3487                 goto out_overflow;
3488         n = be32_to_cpup(p);
3489         if (n == 0)
3490                 goto root_path;
3491         dprintk("pathname4: ");
3492         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3493                 dprintk("cannot parse %d components in path\n", n);
3494                 goto out_eio;
3495         }
3496         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3497                 struct nfs4_string *component = &path->components[path->ncomponents];
3498                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3499                 if (unlikely(status != 0))
3500                         goto out_eio;
3501                 ifdebug (XDR)
3502                         pr_cont("%s%.*s ",
3503                                 (path->ncomponents != n ? "/ " : ""),
3504                                 component->len, component->data);
3505         }
3506 out:
3507         return status;
3508 root_path:
3509 /* a root pathname is sent as a zero component4 */
3510         path->ncomponents = 1;
3511         path->components[0].len=0;
3512         path->components[0].data=NULL;
3513         dprintk("pathname4: /\n");
3514         goto out;
3515 out_eio:
3516         dprintk(" status %d", status);
3517         status = -EIO;
3518         goto out;
3519 out_overflow:
3520         print_overflow_msg(__func__, xdr);
3521         return -EIO;
3522 }
3523
3524 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3525 {
3526         int n;
3527         __be32 *p;
3528         int status = -EIO;
3529
3530         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3531                 goto out;
3532         status = 0;
3533         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3534                 goto out;
3535         status = -EIO;
3536         /* Ignore borken servers that return unrequested attrs */
3537         if (unlikely(res == NULL))
3538                 goto out;
3539         dprintk("%s: fsroot:\n", __func__);
3540         status = decode_pathname(xdr, &res->fs_path);
3541         if (unlikely(status != 0))
3542                 goto out;
3543         p = xdr_inline_decode(xdr, 4);
3544         if (unlikely(!p))
3545                 goto out_overflow;
3546         n = be32_to_cpup(p);
3547         if (n <= 0)
3548                 goto out_eio;
3549         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3550                 u32 m;
3551                 struct nfs4_fs_location *loc;
3552
3553                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3554                         break;
3555                 loc = &res->locations[res->nlocations];
3556                 p = xdr_inline_decode(xdr, 4);
3557                 if (unlikely(!p))
3558                         goto out_overflow;
3559                 m = be32_to_cpup(p);
3560
3561                 dprintk("%s: servers:\n", __func__);
3562                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3563                         struct nfs4_string *server;
3564
3565                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3566                                 unsigned int i;
3567                                 dprintk("%s: using first %u of %u servers "
3568                                         "returned for location %u\n",
3569                                                 __func__,
3570                                                 NFS4_FS_LOCATION_MAXSERVERS,
3571                                                 m, res->nlocations);
3572                                 for (i = loc->nservers; i < m; i++) {
3573                                         unsigned int len;
3574                                         char *data;
3575                                         status = decode_opaque_inline(xdr, &len, &data);
3576                                         if (unlikely(status != 0))
3577                                                 goto out_eio;
3578                                 }
3579                                 break;
3580                         }
3581                         server = &loc->servers[loc->nservers];
3582                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3583                         if (unlikely(status != 0))
3584                                 goto out_eio;
3585                         dprintk("%s ", server->data);
3586                 }
3587                 status = decode_pathname(xdr, &loc->rootpath);
3588                 if (unlikely(status != 0))
3589                         goto out_eio;
3590         }
3591         if (res->nlocations != 0)
3592                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3593 out:
3594         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3595         return status;
3596 out_overflow:
3597         print_overflow_msg(__func__, xdr);
3598 out_eio:
3599         status = -EIO;
3600         goto out;
3601 }
3602
3603 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3604 {
3605         __be32 *p;
3606         int status = 0;
3607
3608         *res = 0;
3609         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3610                 return -EIO;
3611         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3612                 p = xdr_inline_decode(xdr, 8);
3613                 if (unlikely(!p))
3614                         goto out_overflow;
3615                 xdr_decode_hyper(p, res);
3616                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3617         }
3618         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3619         return status;
3620 out_overflow:
3621         print_overflow_msg(__func__, xdr);
3622         return -EIO;
3623 }
3624
3625 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3626 {
3627         __be32 *p;
3628         int status = 0;
3629
3630         *maxlink = 1;
3631         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3632                 return -EIO;
3633         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3634                 p = xdr_inline_decode(xdr, 4);
3635                 if (unlikely(!p))
3636                         goto out_overflow;
3637                 *maxlink = be32_to_cpup(p);
3638                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3639         }
3640         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3641         return status;
3642 out_overflow:
3643         print_overflow_msg(__func__, xdr);
3644         return -EIO;
3645 }
3646
3647 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3648 {
3649         __be32 *p;
3650         int status = 0;
3651
3652         *maxname = 1024;
3653         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3654                 return -EIO;
3655         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3656                 p = xdr_inline_decode(xdr, 4);
3657                 if (unlikely(!p))
3658                         goto out_overflow;
3659                 *maxname = be32_to_cpup(p);
3660                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3661         }
3662         dprintk("%s: maxname=%u\n", __func__, *maxname);
3663         return status;
3664 out_overflow:
3665         print_overflow_msg(__func__, xdr);
3666         return -EIO;
3667 }
3668
3669 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3670 {
3671         __be32 *p;
3672         int status = 0;
3673
3674         *res = 1024;
3675         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3676                 return -EIO;
3677         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3678                 uint64_t maxread;
3679                 p = xdr_inline_decode(xdr, 8);
3680                 if (unlikely(!p))
3681                         goto out_overflow;
3682                 xdr_decode_hyper(p, &maxread);
3683                 if (maxread > 0x7FFFFFFF)
3684                         maxread = 0x7FFFFFFF;
3685                 *res = (uint32_t)maxread;
3686                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3687         }
3688         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3689         return status;
3690 out_overflow:
3691         print_overflow_msg(__func__, xdr);
3692         return -EIO;
3693 }
3694
3695 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3696 {
3697         __be32 *p;
3698         int status = 0;
3699
3700         *res = 1024;
3701         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3702                 return -EIO;
3703         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3704                 uint64_t maxwrite;
3705                 p = xdr_inline_decode(xdr, 8);
3706                 if (unlikely(!p))
3707                         goto out_overflow;
3708                 xdr_decode_hyper(p, &maxwrite);
3709                 if (maxwrite > 0x7FFFFFFF)
3710                         maxwrite = 0x7FFFFFFF;
3711                 *res = (uint32_t)maxwrite;
3712                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3713         }
3714         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3715         return status;
3716 out_overflow:
3717         print_overflow_msg(__func__, xdr);
3718         return -EIO;
3719 }
3720
3721 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3722 {
3723         uint32_t tmp;
3724         __be32 *p;
3725         int ret = 0;
3726
3727         *mode = 0;
3728         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3729                 return -EIO;
3730         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3731                 p = xdr_inline_decode(xdr, 4);
3732                 if (unlikely(!p))
3733                         goto out_overflow;
3734                 tmp = be32_to_cpup(p);
3735                 *mode = tmp & ~S_IFMT;
3736                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3737                 ret = NFS_ATTR_FATTR_MODE;
3738         }
3739         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3740         return ret;
3741 out_overflow:
3742         print_overflow_msg(__func__, xdr);
3743         return -EIO;
3744 }
3745
3746 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3747 {
3748         __be32 *p;
3749         int ret = 0;
3750
3751         *nlink = 1;
3752         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3753                 return -EIO;
3754         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3755                 p = xdr_inline_decode(xdr, 4);
3756                 if (unlikely(!p))
3757                         goto out_overflow;
3758                 *nlink = be32_to_cpup(p);
3759                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3760                 ret = NFS_ATTR_FATTR_NLINK;
3761         }
3762         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3763         return ret;
3764 out_overflow:
3765         print_overflow_msg(__func__, xdr);
3766         return -EIO;
3767 }
3768
3769 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3770                 const struct nfs_server *server, kuid_t *uid,
3771                 struct nfs4_string *owner_name)
3772 {
3773         uint32_t len;
3774         __be32 *p;
3775         int ret = 0;
3776
3777         *uid = make_kuid(&init_user_ns, -2);
3778         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3779                 return -EIO;
3780         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3781                 p = xdr_inline_decode(xdr, 4);
3782                 if (unlikely(!p))
3783                         goto out_overflow;
3784                 len = be32_to_cpup(p);
3785                 p = xdr_inline_decode(xdr, len);
3786                 if (unlikely(!p))
3787                         goto out_overflow;
3788                 if (owner_name != NULL) {
3789                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3790                         if (owner_name->data != NULL) {
3791                                 owner_name->len = len;
3792                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3793                         }
3794                 } else if (len < XDR_MAX_NETOBJ) {
3795                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3796                                 ret = NFS_ATTR_FATTR_OWNER;
3797                         else
3798                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3799                                                 __func__);
3800                 } else
3801                         dprintk("%s: name too long (%u)!\n",
3802                                         __func__, len);
3803                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3804         }
3805         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3806         return ret;
3807 out_overflow:
3808         print_overflow_msg(__func__, xdr);
3809         return -EIO;
3810 }
3811
3812 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3813                 const struct nfs_server *server, kgid_t *gid,
3814                 struct nfs4_string *group_name)
3815 {
3816         uint32_t len;
3817         __be32 *p;
3818         int ret = 0;
3819
3820         *gid = make_kgid(&init_user_ns, -2);
3821         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3822                 return -EIO;
3823         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3824                 p = xdr_inline_decode(xdr, 4);
3825                 if (unlikely(!p))
3826                         goto out_overflow;
3827                 len = be32_to_cpup(p);
3828                 p = xdr_inline_decode(xdr, len);
3829                 if (unlikely(!p))
3830                         goto out_overflow;
3831                 if (group_name != NULL) {
3832                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3833                         if (group_name->data != NULL) {
3834                                 group_name->len = len;
3835                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3836                         }
3837                 } else if (len < XDR_MAX_NETOBJ) {
3838                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3839                                 ret = NFS_ATTR_FATTR_GROUP;
3840                         else
3841                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3842                                                 __func__);
3843                 } else
3844                         dprintk("%s: name too long (%u)!\n",
3845                                         __func__, len);
3846                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3847         }
3848         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3849         return ret;
3850 out_overflow:
3851         print_overflow_msg(__func__, xdr);
3852         return -EIO;
3853 }
3854
3855 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3856 {
3857         uint32_t major = 0, minor = 0;
3858         __be32 *p;
3859         int ret = 0;
3860
3861         *rdev = MKDEV(0,0);
3862         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3865                 dev_t tmp;
3866
3867                 p = xdr_inline_decode(xdr, 8);
3868                 if (unlikely(!p))
3869                         goto out_overflow;
3870                 major = be32_to_cpup(p++);
3871                 minor = be32_to_cpup(p);
3872                 tmp = MKDEV(major, minor);
3873                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3874                         *rdev = tmp;
3875                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3876                 ret = NFS_ATTR_FATTR_RDEV;
3877         }
3878         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3879         return ret;
3880 out_overflow:
3881         print_overflow_msg(__func__, xdr);
3882         return -EIO;
3883 }
3884
3885 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3886 {
3887         __be32 *p;
3888         int status = 0;
3889
3890         *res = 0;
3891         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3892                 return -EIO;
3893         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3894                 p = xdr_inline_decode(xdr, 8);
3895                 if (unlikely(!p))
3896                         goto out_overflow;
3897                 xdr_decode_hyper(p, res);
3898                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3899         }
3900         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3901         return status;
3902 out_overflow:
3903         print_overflow_msg(__func__, xdr);
3904         return -EIO;
3905 }
3906
3907 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3908 {
3909         __be32 *p;
3910         int status = 0;
3911
3912         *res = 0;
3913         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3914                 return -EIO;
3915         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3916                 p = xdr_inline_decode(xdr, 8);
3917                 if (unlikely(!p))
3918                         goto out_overflow;
3919                 xdr_decode_hyper(p, res);
3920                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3921         }
3922         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3923         return status;
3924 out_overflow:
3925         print_overflow_msg(__func__, xdr);
3926         return -EIO;
3927 }
3928
3929 static int decode_attr_space_total(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_TOTAL - 1U)))
3936                 return -EIO;
3937         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
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_TOTAL;
3943         }
3944         dprintk("%s: space total=%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_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3952 {
3953         __be32 *p;
3954         int ret = 0;
3955
3956         *used = 0;
3957         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3958                 return -EIO;
3959         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3960                 p = xdr_inline_decode(xdr, 8);
3961                 if (unlikely(!p))
3962                         goto out_overflow;
3963                 xdr_decode_hyper(p, used);
3964                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3965                 ret = NFS_ATTR_FATTR_SPACE_USED;
3966         }
3967         dprintk("%s: space used=%Lu\n", __func__,
3968                         (unsigned long long)*used);
3969         return ret;
3970 out_overflow:
3971         print_overflow_msg(__func__, xdr);
3972         return -EIO;
3973 }
3974
3975 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3976 {
3977         __be32 *p;
3978         uint64_t sec;
3979         uint32_t nsec;
3980
3981         p = xdr_inline_decode(xdr, 12);
3982         if (unlikely(!p))
3983                 goto out_overflow;
3984         p = xdr_decode_hyper(p, &sec);
3985         nsec = be32_to_cpup(p);
3986         time->tv_sec = (time_t)sec;
3987         time->tv_nsec = (long)nsec;
3988         return 0;
3989 out_overflow:
3990         print_overflow_msg(__func__, xdr);
3991         return -EIO;
3992 }
3993
3994 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3995 {
3996         int status = 0;
3997
3998         time->tv_sec = 0;
3999         time->tv_nsec = 0;
4000         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4001                 return -EIO;
4002         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4003                 status = decode_attr_time(xdr, time);
4004                 if (status == 0)
4005                         status = NFS_ATTR_FATTR_ATIME;
4006                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4007         }
4008         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4009         return status;
4010 }
4011
4012 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4013 {
4014         int status = 0;
4015
4016         time->tv_sec = 0;
4017         time->tv_nsec = 0;
4018         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4019                 return -EIO;
4020         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4021                 status = decode_attr_time(xdr, time);
4022                 if (status == 0)
4023                         status = NFS_ATTR_FATTR_CTIME;
4024                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4025         }
4026         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4027         return status;
4028 }
4029
4030 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4031                                   struct timespec *time)
4032 {
4033         int status = 0;
4034
4035         time->tv_sec = 0;
4036         time->tv_nsec = 0;
4037         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4038                 return -EIO;
4039         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4040                 status = decode_attr_time(xdr, time);
4041                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4042         }
4043         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4044                 (long)time->tv_nsec);
4045         return status;
4046 }
4047
4048 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4049 {
4050         int status = 0;
4051
4052         time->tv_sec = 0;
4053         time->tv_nsec = 0;
4054         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4055                 return -EIO;
4056         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4057                 status = decode_attr_time(xdr, time);
4058                 if (status == 0)
4059                         status = NFS_ATTR_FATTR_MTIME;
4060                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4061         }
4062         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4063         return status;
4064 }
4065
4066 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4067 {
4068         unsigned int attrwords = XDR_QUADLEN(attrlen);
4069         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4070
4071         if (unlikely(attrwords != nwords)) {
4072                 dprintk("%s: server returned incorrect attribute length: "
4073                         "%u %c %u\n",
4074                                 __func__,
4075                                 attrwords << 2,
4076                                 (attrwords < nwords) ? '<' : '>',
4077                                 nwords << 2);
4078                 return -EIO;
4079         }
4080         return 0;
4081 }
4082
4083 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4084 {
4085         __be32 *p;
4086
4087         p = xdr_inline_decode(xdr, 20);
4088         if (unlikely(!p))
4089                 goto out_overflow;
4090         cinfo->atomic = be32_to_cpup(p++);
4091         p = xdr_decode_hyper(p, &cinfo->before);
4092         xdr_decode_hyper(p, &cinfo->after);
4093         return 0;
4094 out_overflow:
4095         print_overflow_msg(__func__, xdr);
4096         return -EIO;
4097 }
4098
4099 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4100 {
4101         __be32 *p;
4102         uint32_t supp, acc;
4103         int status;
4104
4105         status = decode_op_hdr(xdr, OP_ACCESS);
4106         if (status)
4107                 return status;
4108         p = xdr_inline_decode(xdr, 8);
4109         if (unlikely(!p))
4110                 goto out_overflow;
4111         supp = be32_to_cpup(p++);
4112         acc = be32_to_cpup(p);
4113         *supported = supp;
4114         *access = acc;
4115         return 0;
4116 out_overflow:
4117         print_overflow_msg(__func__, xdr);
4118         return -EIO;
4119 }
4120
4121 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4122 {
4123         __be32 *p;
4124
4125         p = xdr_inline_decode(xdr, len);
4126         if (likely(p)) {
4127                 memcpy(buf, p, len);
4128                 return 0;
4129         }
4130         print_overflow_msg(__func__, xdr);
4131         return -EIO;
4132 }
4133
4134 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4135 {
4136         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4137 }
4138
4139 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4140 {
4141         int status;
4142
4143         status = decode_op_hdr(xdr, OP_CLOSE);
4144         if (status != -EIO)
4145                 nfs_increment_open_seqid(status, res->seqid);
4146         if (!status)
4147                 status = decode_stateid(xdr, &res->stateid);
4148         return status;
4149 }
4150
4151 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4152 {
4153         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4154 }
4155
4156 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4157 {
4158         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4159 }
4160
4161 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4162 {
4163         int status;
4164
4165         status = decode_op_hdr(xdr, OP_COMMIT);
4166         if (!status)
4167                 status = decode_write_verifier(xdr, &res->verf->verifier);
4168         return status;
4169 }
4170
4171 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4172 {
4173         __be32 *p;
4174         uint32_t bmlen;
4175         int status;
4176
4177         status = decode_op_hdr(xdr, OP_CREATE);
4178         if (status)
4179                 return status;
4180         if ((status = decode_change_info(xdr, cinfo)))
4181                 return status;
4182         p = xdr_inline_decode(xdr, 4);
4183         if (unlikely(!p))
4184                 goto out_overflow;
4185         bmlen = be32_to_cpup(p);
4186         p = xdr_inline_decode(xdr, bmlen << 2);
4187         if (likely(p))
4188                 return 0;
4189 out_overflow:
4190         print_overflow_msg(__func__, xdr);
4191         return -EIO;
4192 }
4193
4194 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4195 {
4196         unsigned int savep;
4197         uint32_t attrlen, bitmap[3] = {0};
4198         int status;
4199
4200         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4201                 goto xdr_error;
4202         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4203                 goto xdr_error;
4204         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4205                 goto xdr_error;
4206         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4207                 goto xdr_error;
4208         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4209                                                  &res->fh_expire_type)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4216                 goto xdr_error;
4217         status = verify_attr_len(xdr, savep, attrlen);
4218 xdr_error:
4219         dprintk("%s: xdr returned %d!\n", __func__, -status);
4220         return status;
4221 }
4222
4223 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4224 {
4225         unsigned int savep;
4226         uint32_t attrlen, bitmap[3] = {0};
4227         int status;
4228
4229         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4230                 goto xdr_error;
4231         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4232                 goto xdr_error;
4233         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4234                 goto xdr_error;
4235
4236         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4241                 goto xdr_error;
4242         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4243                 goto xdr_error;
4244         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4245                 goto xdr_error;
4246         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4247                 goto xdr_error;
4248
4249         status = verify_attr_len(xdr, savep, attrlen);
4250 xdr_error:
4251         dprintk("%s: xdr returned %d!\n", __func__, -status);
4252         return status;
4253 }
4254
4255 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4256 {
4257         unsigned int savep;
4258         uint32_t attrlen, bitmap[3] = {0};
4259         int status;
4260
4261         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4262                 goto xdr_error;
4263         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4264                 goto xdr_error;
4265         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4266                 goto xdr_error;
4267
4268         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4271                 goto xdr_error;
4272
4273         status = verify_attr_len(xdr, savep, attrlen);
4274 xdr_error:
4275         dprintk("%s: xdr returned %d!\n", __func__, -status);
4276         return status;
4277 }
4278
4279 static int decode_threshold_hint(struct xdr_stream *xdr,
4280                                   uint32_t *bitmap,
4281                                   uint64_t *res,
4282                                   uint32_t hint_bit)
4283 {
4284         __be32 *p;
4285
4286         *res = 0;
4287         if (likely(bitmap[0] & hint_bit)) {
4288                 p = xdr_inline_decode(xdr, 8);
4289                 if (unlikely(!p))
4290                         goto out_overflow;
4291                 xdr_decode_hyper(p, res);
4292         }
4293         return 0;
4294 out_overflow:
4295         print_overflow_msg(__func__, xdr);
4296         return -EIO;
4297 }
4298
4299 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4300                                         struct nfs4_threshold *res)
4301 {
4302         __be32 *p;
4303         unsigned int savep;
4304         uint32_t bitmap[3] = {0,}, attrlen;
4305         int status;
4306
4307         /* layout type */
4308         p = xdr_inline_decode(xdr, 4);
4309         if (unlikely(!p)) {
4310                 print_overflow_msg(__func__, xdr);
4311                 return -EIO;
4312         }
4313         res->l_type = be32_to_cpup(p);
4314
4315         /* thi_hintset bitmap */
4316         status = decode_attr_bitmap(xdr, bitmap);
4317         if (status < 0)
4318                 goto xdr_error;
4319
4320         /* thi_hintlist length */
4321         status = decode_attr_length(xdr, &attrlen, &savep);
4322         if (status < 0)
4323                 goto xdr_error;
4324         /* thi_hintlist */
4325         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4326         if (status < 0)
4327                 goto xdr_error;
4328         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4329         if (status < 0)
4330                 goto xdr_error;
4331         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4332                                        THRESHOLD_RD_IO);
4333         if (status < 0)
4334                 goto xdr_error;
4335         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4336                                        THRESHOLD_WR_IO);
4337         if (status < 0)
4338                 goto xdr_error;
4339
4340         status = verify_attr_len(xdr, savep, attrlen);
4341         res->bm = bitmap[0];
4342
4343         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4344                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4345                 res->wr_io_sz);
4346 xdr_error:
4347         dprintk("%s ret=%d!\n", __func__, status);
4348         return status;
4349 }
4350
4351 /*
4352  * Thresholds on pNFS direct I/O vrs MDS I/O
4353  */
4354 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4355                                     uint32_t *bitmap,
4356                                     struct nfs4_threshold *res)
4357 {
4358         __be32 *p;
4359         int status = 0;
4360         uint32_t num;
4361
4362         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4363                 return -EIO;
4364         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4365                 /* Did the server return an unrequested attribute? */
4366                 if (unlikely(res == NULL))
4367                         return -EREMOTEIO;
4368                 p = xdr_inline_decode(xdr, 4);
4369                 if (unlikely(!p))
4370                         goto out_overflow;
4371                 num = be32_to_cpup(p);
4372                 if (num == 0)
4373                         return 0;
4374                 if (num > 1)
4375                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4376                                 "drivers per filesystem not supported\n",
4377                                 __func__);
4378
4379                 status = decode_first_threshold_item4(xdr, res);
4380                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4381         }
4382         return status;
4383 out_overflow:
4384         print_overflow_msg(__func__, xdr);
4385         return -EIO;
4386 }
4387
4388 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4389                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4390                 struct nfs4_fs_locations *fs_loc,
4391                 const struct nfs_server *server)
4392 {
4393         int status;
4394         umode_t fmode = 0;
4395         uint32_t type;
4396         int32_t err;
4397
4398         status = decode_attr_type(xdr, bitmap, &type);
4399         if (status < 0)
4400                 goto xdr_error;
4401         fattr->mode = 0;
4402         if (status != 0) {
4403                 fattr->mode |= nfs_type2fmt[type];
4404                 fattr->valid |= status;
4405         }
4406
4407         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4408         if (status < 0)
4409                 goto xdr_error;
4410         fattr->valid |= status;
4411
4412         status = decode_attr_size(xdr, bitmap, &fattr->size);
4413         if (status < 0)
4414                 goto xdr_error;
4415         fattr->valid |= status;
4416
4417         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4418         if (status < 0)
4419                 goto xdr_error;
4420         fattr->valid |= status;
4421
4422         err = 0;
4423         status = decode_attr_error(xdr, bitmap, &err);
4424         if (status < 0)
4425                 goto xdr_error;
4426
4427         status = decode_attr_filehandle(xdr, bitmap, fh);
4428         if (status < 0)
4429                 goto xdr_error;
4430
4431         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4432         if (status < 0)
4433                 goto xdr_error;
4434         fattr->valid |= status;
4435
4436         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4437         if (status < 0)
4438                 goto xdr_error;
4439         fattr->valid |= status;
4440
4441         status = decode_attr_mode(xdr, bitmap, &fmode);
4442         if (status < 0)
4443                 goto xdr_error;
4444         if (status != 0) {
4445                 fattr->mode |= fmode;
4446                 fattr->valid |= status;
4447         }
4448
4449         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4450         if (status < 0)
4451                 goto xdr_error;
4452         fattr->valid |= status;
4453
4454         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4455         if (status < 0)
4456                 goto xdr_error;
4457         fattr->valid |= status;
4458
4459         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4460         if (status < 0)
4461                 goto xdr_error;
4462         fattr->valid |= status;
4463
4464         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4465         if (status < 0)
4466                 goto xdr_error;
4467         fattr->valid |= status;
4468
4469         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4470         if (status < 0)
4471                 goto xdr_error;
4472         fattr->valid |= status;
4473
4474         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4475         if (status < 0)
4476                 goto xdr_error;
4477         fattr->valid |= status;
4478
4479         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4480         if (status < 0)
4481                 goto xdr_error;
4482         fattr->valid |= status;
4483
4484         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4485         if (status < 0)
4486                 goto xdr_error;
4487         fattr->valid |= status;
4488
4489         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4490         if (status < 0)
4491                 goto xdr_error;
4492         fattr->valid |= status;
4493
4494         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4495         if (status < 0)
4496                 goto xdr_error;
4497
4498 xdr_error:
4499         dprintk("%s: xdr returned %d\n", __func__, -status);
4500         return status;
4501 }
4502
4503 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4504                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4505                 const struct nfs_server *server)
4506 {
4507         unsigned int savep;
4508         uint32_t attrlen,
4509                  bitmap[3] = {0};
4510         int status;
4511
4512         status = decode_op_hdr(xdr, OP_GETATTR);
4513         if (status < 0)
4514                 goto xdr_error;
4515
4516         status = decode_attr_bitmap(xdr, bitmap);
4517         if (status < 0)
4518                 goto xdr_error;
4519
4520         status = decode_attr_length(xdr, &attrlen, &savep);
4521         if (status < 0)
4522                 goto xdr_error;
4523
4524         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4525         if (status < 0)
4526                 goto xdr_error;
4527
4528         status = verify_attr_len(xdr, savep, attrlen);
4529 xdr_error:
4530         dprintk("%s: xdr returned %d\n", __func__, -status);
4531         return status;
4532 }
4533
4534 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4535                 const struct nfs_server *server)
4536 {
4537         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4538 }
4539
4540 /*
4541  * Decode potentially multiple layout types. Currently we only support
4542  * one layout driver per file system.
4543  */
4544 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4545                                          uint32_t *layouttype)
4546 {
4547         uint32_t *p;
4548         int num;
4549
4550         p = xdr_inline_decode(xdr, 4);
4551         if (unlikely(!p))
4552                 goto out_overflow;
4553         num = be32_to_cpup(p);
4554
4555         /* pNFS is not supported by the underlying file system */
4556         if (num == 0) {
4557                 *layouttype = 0;
4558                 return 0;
4559         }
4560         if (num > 1)
4561                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4562                         "drivers per filesystem not supported\n", __func__);
4563
4564         /* Decode and set first layout type, move xdr->p past unused types */
4565         p = xdr_inline_decode(xdr, num * 4);
4566         if (unlikely(!p))
4567                 goto out_overflow;
4568         *layouttype = be32_to_cpup(p);
4569         return 0;
4570 out_overflow:
4571         print_overflow_msg(__func__, xdr);
4572         return -EIO;
4573 }
4574
4575 /*
4576  * The type of file system exported.
4577  * Note we must ensure that layouttype is set in any non-error case.
4578  */
4579 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4580                                 uint32_t *layouttype)
4581 {
4582         int status = 0;
4583
4584         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4585         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4586                 return -EIO;
4587         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4588                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4589                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4590         } else
4591                 *layouttype = 0;
4592         return status;
4593 }
4594
4595 /*
4596  * The prefered block size for layout directed io
4597  */
4598 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4599                                       uint32_t *res)
4600 {
4601         __be32 *p;
4602
4603         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4604         *res = 0;
4605         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4606                 p = xdr_inline_decode(xdr, 4);
4607                 if (unlikely(!p)) {
4608                         print_overflow_msg(__func__, xdr);
4609                         return -EIO;
4610                 }
4611                 *res = be32_to_cpup(p);
4612                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4613         }
4614         return 0;
4615 }
4616
4617 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4618 {
4619         unsigned int savep;
4620         uint32_t attrlen, bitmap[3];
4621         int status;
4622
4623         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4624                 goto xdr_error;
4625         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4626                 goto xdr_error;
4627         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4628                 goto xdr_error;
4629
4630         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4631
4632         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4633                 goto xdr_error;
4634         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4635                 goto xdr_error;
4636         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4637                 goto xdr_error;
4638         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4639         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4640                 goto xdr_error;
4641         fsinfo->wtpref = fsinfo->wtmax;
4642         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4643         if (status != 0)
4644                 goto xdr_error;
4645         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4646         if (status != 0)
4647                 goto xdr_error;
4648         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4649         if (status)
4650                 goto xdr_error;
4651
4652         status = verify_attr_len(xdr, savep, attrlen);
4653 xdr_error:
4654         dprintk("%s: xdr returned %d!\n", __func__, -status);
4655         return status;
4656 }
4657
4658 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4659 {
4660         __be32 *p;
4661         uint32_t len;
4662         int status;
4663
4664         /* Zero handle first to allow comparisons */
4665         memset(fh, 0, sizeof(*fh));
4666
4667         status = decode_op_hdr(xdr, OP_GETFH);
4668         if (status)
4669                 return status;
4670
4671         p = xdr_inline_decode(xdr, 4);
4672         if (unlikely(!p))
4673                 goto out_overflow;
4674         len = be32_to_cpup(p);
4675         if (len > NFS4_FHSIZE)
4676                 return -EIO;
4677         fh->size = len;
4678         p = xdr_inline_decode(xdr, len);
4679         if (unlikely(!p))
4680                 goto out_overflow;
4681         memcpy(fh->data, p, len);
4682         return 0;
4683 out_overflow:
4684         print_overflow_msg(__func__, xdr);
4685         return -EIO;
4686 }
4687
4688 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4689 {
4690         int status;
4691
4692         status = decode_op_hdr(xdr, OP_LINK);
4693         if (status)
4694                 return status;
4695         return decode_change_info(xdr, cinfo);
4696 }
4697
4698 /*
4699  * We create the owner, so we know a proper owner.id length is 4.
4700  */
4701 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4702 {
4703         uint64_t offset, length, clientid;
4704         __be32 *p;
4705         uint32_t namelen, type;
4706
4707         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4708         if (unlikely(!p))
4709                 goto out_overflow;
4710         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4711         p = xdr_decode_hyper(p, &length);
4712         type = be32_to_cpup(p++); /* 4 byte read */
4713         if (fl != NULL) { /* manipulate file lock */
4714                 fl->fl_start = (loff_t)offset;
4715                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4716                 if (length == ~(uint64_t)0)
4717                         fl->fl_end = OFFSET_MAX;
4718                 fl->fl_type = F_WRLCK;
4719                 if (type & 1)
4720                         fl->fl_type = F_RDLCK;
4721                 fl->fl_pid = 0;
4722         }
4723         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4724         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4725         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4726         if (likely(p))
4727                 return -NFS4ERR_DENIED;
4728 out_overflow:
4729         print_overflow_msg(__func__, xdr);
4730         return -EIO;
4731 }
4732
4733 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4734 {
4735         int status;
4736
4737         status = decode_op_hdr(xdr, OP_LOCK);
4738         if (status == -EIO)
4739                 goto out;
4740         if (status == 0) {
4741                 status = decode_stateid(xdr, &res->stateid);
4742                 if (unlikely(status))
4743                         goto out;
4744         } else if (status == -NFS4ERR_DENIED)
4745                 status = decode_lock_denied(xdr, NULL);
4746         if (res->open_seqid != NULL)
4747                 nfs_increment_open_seqid(status, res->open_seqid);
4748         nfs_increment_lock_seqid(status, res->lock_seqid);
4749 out:
4750         return status;
4751 }
4752
4753 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4754 {
4755         int status;
4756         status = decode_op_hdr(xdr, OP_LOCKT);
4757         if (status == -NFS4ERR_DENIED)
4758                 return decode_lock_denied(xdr, res->denied);
4759         return status;
4760 }
4761
4762 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4763 {
4764         int status;
4765
4766         status = decode_op_hdr(xdr, OP_LOCKU);
4767         if (status != -EIO)
4768                 nfs_increment_lock_seqid(status, res->seqid);
4769         if (status == 0)
4770                 status = decode_stateid(xdr, &res->stateid);
4771         return status;
4772 }
4773
4774 static int decode_release_lockowner(struct xdr_stream *xdr)
4775 {
4776         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4777 }
4778
4779 static int decode_lookup(struct xdr_stream *xdr)
4780 {
4781         return decode_op_hdr(xdr, OP_LOOKUP);
4782 }
4783
4784 /* This is too sick! */
4785 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4786 {
4787         __be32 *p;
4788         uint32_t limit_type, nblocks, blocksize;
4789
4790         p = xdr_inline_decode(xdr, 12);
4791         if (unlikely(!p))
4792                 goto out_overflow;
4793         limit_type = be32_to_cpup(p++);
4794         switch (limit_type) {
4795         case 1:
4796                 xdr_decode_hyper(p, maxsize);
4797                 break;
4798         case 2:
4799                 nblocks = be32_to_cpup(p++);
4800                 blocksize = be32_to_cpup(p);
4801                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4802         }
4803         return 0;
4804 out_overflow:
4805         print_overflow_msg(__func__, xdr);
4806         return -EIO;
4807 }
4808
4809 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4810 {
4811         __be32 *p;
4812         uint32_t delegation_type;
4813         int status;
4814
4815         p = xdr_inline_decode(xdr, 4);
4816         if (unlikely(!p))
4817                 goto out_overflow;
4818         delegation_type = be32_to_cpup(p);
4819         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4820                 res->delegation_type = 0;
4821                 return 0;
4822         }
4823         status = decode_stateid(xdr, &res->delegation);
4824         if (unlikely(status))
4825                 return status;
4826         p = xdr_inline_decode(xdr, 4);
4827         if (unlikely(!p))
4828                 goto out_overflow;
4829         res->do_recall = be32_to_cpup(p);
4830
4831         switch (delegation_type) {
4832         case NFS4_OPEN_DELEGATE_READ:
4833                 res->delegation_type = FMODE_READ;
4834                 break;
4835         case NFS4_OPEN_DELEGATE_WRITE:
4836                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4837                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4838                                 return -EIO;
4839         }
4840         return decode_ace(xdr, NULL, res->server->nfs_client);
4841 out_overflow:
4842         print_overflow_msg(__func__, xdr);
4843         return -EIO;
4844 }
4845
4846 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4847 {
4848         __be32 *p;
4849         uint32_t savewords, bmlen, i;
4850         int status;
4851
4852         status = decode_op_hdr(xdr, OP_OPEN);
4853         if (status != -EIO)
4854                 nfs_increment_open_seqid(status, res->seqid);
4855         if (!status)
4856                 status = decode_stateid(xdr, &res->stateid);
4857         if (unlikely(status))
4858                 return status;
4859
4860         decode_change_info(xdr, &res->cinfo);
4861
4862         p = xdr_inline_decode(xdr, 8);
4863         if (unlikely(!p))
4864                 goto out_overflow;
4865         res->rflags = be32_to_cpup(p++);
4866         bmlen = be32_to_cpup(p);
4867         if (bmlen > 10)
4868                 goto xdr_error;
4869
4870         p = xdr_inline_decode(xdr, bmlen << 2);
4871         if (unlikely(!p))
4872                 goto out_overflow;
4873         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4874         for (i = 0; i < savewords; ++i)
4875                 res->attrset[i] = be32_to_cpup(p++);
4876         for (; i < NFS4_BITMAP_SIZE; i++)
4877                 res->attrset[i] = 0;
4878
4879         return decode_delegation(xdr, res);
4880 xdr_error:
4881         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4882         return -EIO;
4883 out_overflow:
4884         print_overflow_msg(__func__, xdr);
4885         return -EIO;
4886 }
4887
4888 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4889 {
4890         int status;
4891
4892         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4893         if (status != -EIO)
4894                 nfs_increment_open_seqid(status, res->seqid);
4895         if (!status)
4896                 status = decode_stateid(xdr, &res->stateid);
4897         return status;
4898 }
4899
4900 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4901 {
4902         int status;
4903
4904         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4905         if (status != -EIO)
4906                 nfs_increment_open_seqid(status, res->seqid);
4907         if (!status)
4908                 status = decode_stateid(xdr, &res->stateid);
4909         return status;
4910 }
4911
4912 static int decode_putfh(struct xdr_stream *xdr)
4913 {
4914         return decode_op_hdr(xdr, OP_PUTFH);
4915 }
4916
4917 static int decode_putrootfh(struct xdr_stream *xdr)
4918 {
4919         return decode_op_hdr(xdr, OP_PUTROOTFH);
4920 }
4921
4922 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4923 {
4924         __be32 *p;
4925         uint32_t count, eof, recvd;
4926         int status;
4927
4928         status = decode_op_hdr(xdr, OP_READ);
4929         if (status)
4930                 return status;
4931         p = xdr_inline_decode(xdr, 8);
4932         if (unlikely(!p))
4933                 goto out_overflow;
4934         eof = be32_to_cpup(p++);
4935         count = be32_to_cpup(p);
4936         recvd = xdr_read_pages(xdr, count);
4937         if (count > recvd) {
4938                 dprintk("NFS: server cheating in read reply: "
4939                                 "count %u > recvd %u\n", count, recvd);
4940                 count = recvd;
4941                 eof = 0;
4942         }
4943         res->eof = eof;
4944         res->count = count;
4945         return 0;
4946 out_overflow:
4947         print_overflow_msg(__func__, xdr);
4948         return -EIO;
4949 }
4950
4951 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4952 {
4953         int             status;
4954         __be32          verf[2];
4955
4956         status = decode_op_hdr(xdr, OP_READDIR);
4957         if (!status)
4958                 status = decode_verifier(xdr, readdir->verifier.data);
4959         if (unlikely(status))
4960                 return status;
4961         memcpy(verf, readdir->verifier.data, sizeof(verf));
4962         dprintk("%s: verifier = %08x:%08x\n",
4963                         __func__, verf[0], verf[1]);
4964         return xdr_read_pages(xdr, xdr->buf->page_len);
4965 }
4966
4967 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4968 {
4969         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4970         u32 len, recvd;
4971         __be32 *p;
4972         int status;
4973
4974         status = decode_op_hdr(xdr, OP_READLINK);
4975         if (status)
4976                 return status;
4977
4978         /* Convert length of symlink */
4979         p = xdr_inline_decode(xdr, 4);
4980         if (unlikely(!p))
4981                 goto out_overflow;
4982         len = be32_to_cpup(p);
4983         if (len >= rcvbuf->page_len || len <= 0) {
4984                 dprintk("nfs: server returned giant symlink!\n");
4985                 return -ENAMETOOLONG;
4986         }
4987         recvd = xdr_read_pages(xdr, len);
4988         if (recvd < len) {
4989                 dprintk("NFS: server cheating in readlink reply: "
4990                                 "count %u > recvd %u\n", len, recvd);
4991                 return -EIO;
4992         }
4993         /*
4994          * The XDR encode routine has set things up so that
4995          * the link text will be copied directly into the
4996          * buffer.  We just have to do overflow-checking,
4997          * and and null-terminate the text (the VFS expects
4998          * null-termination).
4999          */
5000         xdr_terminate_string(rcvbuf, len);
5001         return 0;
5002 out_overflow:
5003         print_overflow_msg(__func__, xdr);
5004         return -EIO;
5005 }
5006
5007 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5008 {
5009         int status;
5010
5011         status = decode_op_hdr(xdr, OP_REMOVE);
5012         if (status)
5013                 goto out;
5014         status = decode_change_info(xdr, cinfo);
5015 out:
5016         return status;
5017 }
5018
5019 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5020               struct nfs4_change_info *new_cinfo)
5021 {
5022         int status;
5023
5024         status = decode_op_hdr(xdr, OP_RENAME);
5025         if (status)
5026                 goto out;
5027         if ((status = decode_change_info(xdr, old_cinfo)))
5028                 goto out;
5029         status = decode_change_info(xdr, new_cinfo);
5030 out:
5031         return status;
5032 }
5033
5034 static int decode_renew(struct xdr_stream *xdr)
5035 {
5036         return decode_op_hdr(xdr, OP_RENEW);
5037 }
5038
5039 static int
5040 decode_restorefh(struct xdr_stream *xdr)
5041 {
5042         return decode_op_hdr(xdr, OP_RESTOREFH);
5043 }
5044
5045 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5046                          struct nfs_getaclres *res)
5047 {
5048         unsigned int savep;
5049         uint32_t attrlen,
5050                  bitmap[3] = {0};
5051         int status;
5052         unsigned int pg_offset;
5053
5054         res->acl_len = 0;
5055         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5056                 goto out;
5057
5058         xdr_enter_page(xdr, xdr->buf->page_len);
5059
5060         /* Calculate the offset of the page data */
5061         pg_offset = xdr->buf->head[0].iov_len;
5062
5063         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5064                 goto out;
5065         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5066                 goto out;
5067
5068         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5069                 return -EIO;
5070         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5071
5072                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5073                  * are stored with the acl data to handle the problem of
5074                  * variable length bitmaps.*/
5075                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5076                 res->acl_len = attrlen;
5077
5078                 /* Check for receive buffer overflow */
5079                 if (res->acl_len > (xdr->nwords << 2) ||
5080                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5081                         res->acl_flags |= NFS4_ACL_TRUNC;
5082                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5083                                         attrlen, xdr->nwords << 2);
5084                 }
5085         } else
5086                 status = -EOPNOTSUPP;
5087
5088 out:
5089         return status;
5090 }
5091
5092 static int
5093 decode_savefh(struct xdr_stream *xdr)
5094 {
5095         return decode_op_hdr(xdr, OP_SAVEFH);
5096 }
5097
5098 static int decode_setattr(struct xdr_stream *xdr)
5099 {
5100         __be32 *p;
5101         uint32_t bmlen;
5102         int status;
5103
5104         status = decode_op_hdr(xdr, OP_SETATTR);
5105         if (status)
5106                 return status;
5107         p = xdr_inline_decode(xdr, 4);
5108         if (unlikely(!p))
5109                 goto out_overflow;
5110         bmlen = be32_to_cpup(p);
5111         p = xdr_inline_decode(xdr, bmlen << 2);
5112         if (likely(p))
5113                 return 0;
5114 out_overflow:
5115         print_overflow_msg(__func__, xdr);
5116         return -EIO;
5117 }
5118
5119 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5120 {
5121         __be32 *p;
5122         uint32_t opnum;
5123         int32_t nfserr;
5124
5125         p = xdr_inline_decode(xdr, 8);
5126         if (unlikely(!p))
5127                 goto out_overflow;
5128         opnum = be32_to_cpup(p++);
5129         if (opnum != OP_SETCLIENTID) {
5130                 dprintk("nfs: decode_setclientid: Server returned operation"
5131                         " %d\n", opnum);
5132                 return -EIO;
5133         }
5134         nfserr = be32_to_cpup(p);
5135         if (nfserr == NFS_OK) {
5136                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5137                 if (unlikely(!p))
5138                         goto out_overflow;
5139                 p = xdr_decode_hyper(p, &res->clientid);
5140                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5141         } else if (nfserr == NFSERR_CLID_INUSE) {
5142                 uint32_t len;
5143
5144                 /* skip netid string */
5145                 p = xdr_inline_decode(xdr, 4);
5146                 if (unlikely(!p))
5147                         goto out_overflow;
5148                 len = be32_to_cpup(p);
5149                 p = xdr_inline_decode(xdr, len);
5150                 if (unlikely(!p))
5151                         goto out_overflow;
5152
5153                 /* skip uaddr string */
5154                 p = xdr_inline_decode(xdr, 4);
5155                 if (unlikely(!p))
5156                         goto out_overflow;
5157                 len = be32_to_cpup(p);
5158                 p = xdr_inline_decode(xdr, len);
5159                 if (unlikely(!p))
5160                         goto out_overflow;
5161                 return -NFSERR_CLID_INUSE;
5162         } else
5163                 return nfs4_stat_to_errno(nfserr);
5164
5165         return 0;
5166 out_overflow:
5167         print_overflow_msg(__func__, xdr);
5168         return -EIO;
5169 }
5170
5171 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5172 {
5173         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5174 }
5175
5176 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5177 {
5178         __be32 *p;
5179         int status;
5180
5181         status = decode_op_hdr(xdr, OP_WRITE);
5182         if (status)
5183                 return status;
5184
5185         p = xdr_inline_decode(xdr, 8);
5186         if (unlikely(!p))
5187                 goto out_overflow;
5188         res->count = be32_to_cpup(p++);
5189         res->verf->committed = be32_to_cpup(p++);
5190         return decode_write_verifier(xdr, &res->verf->verifier);
5191 out_overflow:
5192         print_overflow_msg(__func__, xdr);
5193         return -EIO;
5194 }
5195
5196 static int decode_delegreturn(struct xdr_stream *xdr)
5197 {
5198         return decode_op_hdr(xdr, OP_DELEGRETURN);
5199 }
5200
5201 static int decode_secinfo_gss(struct xdr_stream *xdr,
5202                               struct nfs4_secinfo4 *flavor)
5203 {
5204         u32 oid_len;
5205         __be32 *p;
5206
5207         p = xdr_inline_decode(xdr, 4);
5208         if (unlikely(!p))
5209                 goto out_overflow;
5210         oid_len = be32_to_cpup(p);
5211         if (oid_len > GSS_OID_MAX_LEN)
5212                 goto out_err;
5213
5214         p = xdr_inline_decode(xdr, oid_len);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5218         flavor->flavor_info.oid.len = oid_len;
5219
5220         p = xdr_inline_decode(xdr, 8);
5221         if (unlikely(!p))
5222                 goto out_overflow;
5223         flavor->flavor_info.qop = be32_to_cpup(p++);
5224         flavor->flavor_info.service = be32_to_cpup(p);
5225
5226         return 0;
5227
5228 out_overflow:
5229         print_overflow_msg(__func__, xdr);
5230         return -EIO;
5231 out_err:
5232         return -EINVAL;
5233 }
5234
5235 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5236 {
5237         struct nfs4_secinfo4 *sec_flavor;
5238         unsigned int i, num_flavors;
5239         int status;
5240         __be32 *p;
5241
5242         p = xdr_inline_decode(xdr, 4);
5243         if (unlikely(!p))
5244                 goto out_overflow;
5245
5246         res->flavors->num_flavors = 0;
5247         num_flavors = be32_to_cpup(p);
5248
5249         for (i = 0; i < num_flavors; i++) {
5250                 sec_flavor = &res->flavors->flavors[i];
5251                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5252                         break;
5253
5254                 p = xdr_inline_decode(xdr, 4);
5255                 if (unlikely(!p))
5256                         goto out_overflow;
5257                 sec_flavor->flavor = be32_to_cpup(p);
5258
5259                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5260                         status = decode_secinfo_gss(xdr, sec_flavor);
5261                         if (status)
5262                                 goto out;
5263                 }
5264                 res->flavors->num_flavors++;
5265         }
5266
5267         status = 0;
5268 out:
5269         return status;
5270 out_overflow:
5271         print_overflow_msg(__func__, xdr);
5272         return -EIO;
5273 }
5274
5275 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5276 {
5277         int status = decode_op_hdr(xdr, OP_SECINFO);
5278         if (status)
5279                 return status;
5280         return decode_secinfo_common(xdr, res);
5281 }
5282
5283 #if defined(CONFIG_NFS_V4_1)
5284 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5285 {
5286         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5287         if (status)
5288                 return status;
5289         return decode_secinfo_common(xdr, res);
5290 }
5291
5292 static int decode_exchange_id(struct xdr_stream *xdr,
5293                               struct nfs41_exchange_id_res *res)
5294 {
5295         __be32 *p;
5296         uint32_t dummy;
5297         char *dummy_str;
5298         int status;
5299         uint32_t impl_id_count;
5300
5301         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5302         if (status)
5303                 return status;
5304
5305         p = xdr_inline_decode(xdr, 8);
5306         if (unlikely(!p))
5307                 goto out_overflow;
5308         xdr_decode_hyper(p, &res->clientid);
5309         p = xdr_inline_decode(xdr, 12);
5310         if (unlikely(!p))
5311                 goto out_overflow;
5312         res->seqid = be32_to_cpup(p++);
5313         res->flags = be32_to_cpup(p++);
5314
5315         /* We ask for SP4_NONE */
5316         dummy = be32_to_cpup(p);
5317         if (dummy != SP4_NONE)
5318                 return -EIO;
5319
5320         /* server_owner4.so_minor_id */
5321         p = xdr_inline_decode(xdr, 8);
5322         if (unlikely(!p))
5323                 goto out_overflow;
5324         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5325
5326         /* server_owner4.so_major_id */
5327         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5328         if (unlikely(status))
5329                 return status;
5330         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5331                 return -EIO;
5332         memcpy(res->server_owner->major_id, dummy_str, dummy);
5333         res->server_owner->major_id_sz = dummy;
5334
5335         /* server_scope4 */
5336         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5337         if (unlikely(status))
5338                 return status;
5339         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5340                 return -EIO;
5341         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5342         res->server_scope->server_scope_sz = dummy;
5343
5344         /* Implementation Id */
5345         p = xdr_inline_decode(xdr, 4);
5346         if (unlikely(!p))
5347                 goto out_overflow;
5348         impl_id_count = be32_to_cpup(p++);
5349
5350         if (impl_id_count) {
5351                 /* nii_domain */
5352                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5353                 if (unlikely(status))
5354                         return status;
5355                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5356                         return -EIO;
5357                 memcpy(res->impl_id->domain, dummy_str, dummy);
5358
5359                 /* nii_name */
5360                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5361                 if (unlikely(status))
5362                         return status;
5363                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5364                         return -EIO;
5365                 memcpy(res->impl_id->name, dummy_str, dummy);
5366
5367                 /* nii_date */
5368                 p = xdr_inline_decode(xdr, 12);
5369                 if (unlikely(!p))
5370                         goto out_overflow;
5371                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5372                 res->impl_id->date.nseconds = be32_to_cpup(p);
5373
5374                 /* if there's more than one entry, ignore the rest */
5375         }
5376         return 0;
5377 out_overflow:
5378         print_overflow_msg(__func__, xdr);
5379         return -EIO;
5380 }
5381
5382 static int decode_chan_attrs(struct xdr_stream *xdr,
5383                              struct nfs4_channel_attrs *attrs)
5384 {
5385         __be32 *p;
5386         u32 nr_attrs, val;
5387
5388         p = xdr_inline_decode(xdr, 28);
5389         if (unlikely(!p))
5390                 goto out_overflow;
5391         val = be32_to_cpup(p++);        /* headerpadsz */
5392         if (val)
5393                 return -EINVAL;         /* no support for header padding yet */
5394         attrs->max_rqst_sz = be32_to_cpup(p++);
5395         attrs->max_resp_sz = be32_to_cpup(p++);
5396         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5397         attrs->max_ops = be32_to_cpup(p++);
5398         attrs->max_reqs = be32_to_cpup(p++);
5399         nr_attrs = be32_to_cpup(p);
5400         if (unlikely(nr_attrs > 1)) {
5401                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5402                         "count %u\n", __func__, nr_attrs);
5403                 return -EINVAL;
5404         }
5405         if (nr_attrs == 1) {
5406                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5407                 if (unlikely(!p))
5408                         goto out_overflow;
5409         }
5410         return 0;
5411 out_overflow:
5412         print_overflow_msg(__func__, xdr);
5413         return -EIO;
5414 }
5415
5416 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5417 {
5418         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5419 }
5420
5421 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5422                                 struct nfs41_bind_conn_to_session_res *res)
5423 {
5424         __be32 *p;
5425         int status;
5426
5427         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5428         if (!status)
5429                 status = decode_sessionid(xdr, &res->session->sess_id);
5430         if (unlikely(status))
5431                 return status;
5432
5433         /* dir flags, rdma mode bool */
5434         p = xdr_inline_decode(xdr, 8);
5435         if (unlikely(!p))
5436                 goto out_overflow;
5437
5438         res->dir = be32_to_cpup(p++);
5439         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5440                 return -EIO;
5441         if (be32_to_cpup(p) == 0)
5442                 res->use_conn_in_rdma_mode = false;
5443         else
5444                 res->use_conn_in_rdma_mode = true;
5445
5446         return 0;
5447 out_overflow:
5448         print_overflow_msg(__func__, xdr);
5449         return -EIO;
5450 }
5451
5452 static int decode_create_session(struct xdr_stream *xdr,
5453                                  struct nfs41_create_session_res *res)
5454 {
5455         __be32 *p;
5456         int status;
5457         struct nfs_client *clp = res->client;
5458         struct nfs4_session *session = clp->cl_session;
5459
5460         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5461         if (!status)
5462                 status = decode_sessionid(xdr, &session->sess_id);
5463         if (unlikely(status))
5464                 return status;
5465
5466         /* seqid, flags */
5467         p = xdr_inline_decode(xdr, 8);
5468         if (unlikely(!p))
5469                 goto out_overflow;
5470         clp->cl_seqid = be32_to_cpup(p++);
5471         session->flags = be32_to_cpup(p);
5472
5473         /* Channel attributes */
5474         status = decode_chan_attrs(xdr, &session->fc_attrs);
5475         if (!status)
5476                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5477         return status;
5478 out_overflow:
5479         print_overflow_msg(__func__, xdr);
5480         return -EIO;
5481 }
5482
5483 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5484 {
5485         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5486 }
5487
5488 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5489 {
5490         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5491 }
5492
5493 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5494 {
5495         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5496 }
5497 #endif /* CONFIG_NFS_V4_1 */
5498
5499 static int decode_sequence(struct xdr_stream *xdr,
5500                            struct nfs4_sequence_res *res,
5501                            struct rpc_rqst *rqstp)
5502 {
5503 #if defined(CONFIG_NFS_V4_1)
5504         struct nfs4_session *session;
5505         struct nfs4_sessionid id;
5506         u32 dummy;
5507         int status;
5508         __be32 *p;
5509
5510         if (res->sr_slot == NULL)
5511                 return 0;
5512
5513         status = decode_op_hdr(xdr, OP_SEQUENCE);
5514         if (!status)
5515                 status = decode_sessionid(xdr, &id);
5516         if (unlikely(status))
5517                 goto out_err;
5518
5519         /*
5520          * If the server returns different values for sessionID, slotID or
5521          * sequence number, the server is looney tunes.
5522          */
5523         status = -EREMOTEIO;
5524         session = res->sr_slot->table->session;
5525
5526         if (memcmp(id.data, session->sess_id.data,
5527                    NFS4_MAX_SESSIONID_LEN)) {
5528                 dprintk("%s Invalid session id\n", __func__);
5529                 goto out_err;
5530         }
5531
5532         p = xdr_inline_decode(xdr, 20);
5533         if (unlikely(!p))
5534                 goto out_overflow;
5535
5536         /* seqid */
5537         dummy = be32_to_cpup(p++);
5538         if (dummy != res->sr_slot->seq_nr) {
5539                 dprintk("%s Invalid sequence number\n", __func__);
5540                 goto out_err;
5541         }
5542         /* slot id */
5543         dummy = be32_to_cpup(p++);
5544         if (dummy != res->sr_slot->slot_nr) {
5545                 dprintk("%s Invalid slot id\n", __func__);
5546                 goto out_err;
5547         }
5548         /* highest slot id */
5549         res->sr_highest_slotid = be32_to_cpup(p++);
5550         /* target highest slot id */
5551         res->sr_target_highest_slotid = be32_to_cpup(p++);
5552         /* result flags */
5553         res->sr_status_flags = be32_to_cpup(p);
5554         status = 0;
5555 out_err:
5556         res->sr_status = status;
5557         return status;
5558 out_overflow:
5559         print_overflow_msg(__func__, xdr);
5560         status = -EIO;
5561         goto out_err;
5562 #else  /* CONFIG_NFS_V4_1 */
5563         return 0;
5564 #endif /* CONFIG_NFS_V4_1 */
5565 }
5566
5567 #if defined(CONFIG_NFS_V4_1)
5568 /*
5569  * TODO: Need to handle case when EOF != true;
5570  */
5571 static int decode_getdevicelist(struct xdr_stream *xdr,
5572                                 struct pnfs_devicelist *res)
5573 {
5574         __be32 *p;
5575         int status, i;
5576         nfs4_verifier verftemp;
5577
5578         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5579         if (status)
5580                 return status;
5581
5582         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5583         if (unlikely(!p))
5584                 goto out_overflow;
5585
5586         /* TODO: Skip cookie for now */
5587         p += 2;
5588
5589         /* Read verifier */
5590         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5591
5592         res->num_devs = be32_to_cpup(p);
5593
5594         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5595
5596         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5597                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5598                                 __func__, res->num_devs);
5599                 return -EIO;
5600         }
5601
5602         p = xdr_inline_decode(xdr,
5603                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5604         if (unlikely(!p))
5605                 goto out_overflow;
5606         for (i = 0; i < res->num_devs; i++)
5607                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5608                                             NFS4_DEVICEID4_SIZE);
5609         res->eof = be32_to_cpup(p);
5610         return 0;
5611 out_overflow:
5612         print_overflow_msg(__func__, xdr);
5613         return -EIO;
5614 }
5615
5616 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5617                                 struct pnfs_device *pdev)
5618 {
5619         __be32 *p;
5620         uint32_t len, type;
5621         int status;
5622
5623         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5624         if (status) {
5625                 if (status == -ETOOSMALL) {
5626                         p = xdr_inline_decode(xdr, 4);
5627                         if (unlikely(!p))
5628                                 goto out_overflow;
5629                         pdev->mincount = be32_to_cpup(p);
5630                         dprintk("%s: Min count too small. mincnt = %u\n",
5631                                 __func__, pdev->mincount);
5632                 }
5633                 return status;
5634         }
5635
5636         p = xdr_inline_decode(xdr, 8);
5637         if (unlikely(!p))
5638                 goto out_overflow;
5639         type = be32_to_cpup(p++);
5640         if (type != pdev->layout_type) {
5641                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5642                         __func__, pdev->layout_type, type);
5643                 return -EINVAL;
5644         }
5645         /*
5646          * Get the length of the opaque device_addr4. xdr_read_pages places
5647          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5648          * and places the remaining xdr data in xdr_buf->tail
5649          */
5650         pdev->mincount = be32_to_cpup(p);
5651         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5652                 goto out_overflow;
5653
5654         /* Parse notification bitmap, verifying that it is zero. */
5655         p = xdr_inline_decode(xdr, 4);
5656         if (unlikely(!p))
5657                 goto out_overflow;
5658         len = be32_to_cpup(p);
5659         if (len) {
5660                 uint32_t i;
5661
5662                 p = xdr_inline_decode(xdr, 4 * len);
5663                 if (unlikely(!p))
5664                         goto out_overflow;
5665                 for (i = 0; i < len; i++, p++) {
5666                         if (be32_to_cpup(p)) {
5667                                 dprintk("%s: notifications not supported\n",
5668                                         __func__);
5669                                 return -EIO;
5670                         }
5671                 }
5672         }
5673         return 0;
5674 out_overflow:
5675         print_overflow_msg(__func__, xdr);
5676         return -EIO;
5677 }
5678
5679 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5680                             struct nfs4_layoutget_res *res)
5681 {
5682         __be32 *p;
5683         int status;
5684         u32 layout_count;
5685         u32 recvd;
5686
5687         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5688         if (status)
5689                 return status;
5690         p = xdr_inline_decode(xdr, 4);
5691         if (unlikely(!p))
5692                 goto out_overflow;
5693         res->return_on_close = be32_to_cpup(p);
5694         decode_stateid(xdr, &res->stateid);
5695         p = xdr_inline_decode(xdr, 4);
5696         if (unlikely(!p))
5697                 goto out_overflow;
5698         layout_count = be32_to_cpup(p);
5699         if (!layout_count) {
5700                 dprintk("%s: server responded with empty layout array\n",
5701                         __func__);
5702                 return -EINVAL;
5703         }
5704
5705         p = xdr_inline_decode(xdr, 28);
5706         if (unlikely(!p))
5707                 goto out_overflow;
5708         p = xdr_decode_hyper(p, &res->range.offset);
5709         p = xdr_decode_hyper(p, &res->range.length);
5710         res->range.iomode = be32_to_cpup(p++);
5711         res->type = be32_to_cpup(p++);
5712         res->layoutp->len = be32_to_cpup(p);
5713
5714         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5715                 __func__,
5716                 (unsigned long)res->range.offset,
5717                 (unsigned long)res->range.length,
5718                 res->range.iomode,
5719                 res->type,
5720                 res->layoutp->len);
5721
5722         recvd = xdr_read_pages(xdr, res->layoutp->len);
5723         if (res->layoutp->len > recvd) {
5724                 dprintk("NFS: server cheating in layoutget reply: "
5725                                 "layout len %u > recvd %u\n",
5726                                 res->layoutp->len, recvd);
5727                 return -EINVAL;
5728         }
5729
5730         if (layout_count > 1) {
5731                 /* We only handle a length one array at the moment.  Any
5732                  * further entries are just ignored.  Note that this means
5733                  * the client may see a response that is less than the
5734                  * minimum it requested.
5735                  */
5736                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5737                         __func__, layout_count);
5738         }
5739
5740         return 0;
5741 out_overflow:
5742         print_overflow_msg(__func__, xdr);
5743         return -EIO;
5744 }
5745
5746 static int decode_layoutreturn(struct xdr_stream *xdr,
5747                                struct nfs4_layoutreturn_res *res)
5748 {
5749         __be32 *p;
5750         int status;
5751
5752         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5753         if (status)
5754                 return status;
5755         p = xdr_inline_decode(xdr, 4);
5756         if (unlikely(!p))
5757                 goto out_overflow;
5758         res->lrs_present = be32_to_cpup(p);
5759         if (res->lrs_present)
5760                 status = decode_stateid(xdr, &res->stateid);
5761         return status;
5762 out_overflow:
5763         print_overflow_msg(__func__, xdr);
5764         return -EIO;
5765 }
5766
5767 static int decode_layoutcommit(struct xdr_stream *xdr,
5768                                struct rpc_rqst *req,
5769                                struct nfs4_layoutcommit_res *res)
5770 {
5771         __be32 *p;
5772         __u32 sizechanged;
5773         int status;
5774
5775         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5776         res->status = status;
5777         if (status)
5778                 return status;
5779
5780         p = xdr_inline_decode(xdr, 4);
5781         if (unlikely(!p))
5782                 goto out_overflow;
5783         sizechanged = be32_to_cpup(p);
5784
5785         if (sizechanged) {
5786                 /* throw away new size */
5787                 p = xdr_inline_decode(xdr, 8);
5788                 if (unlikely(!p))
5789                         goto out_overflow;
5790         }
5791         return 0;
5792 out_overflow:
5793         print_overflow_msg(__func__, xdr);
5794         return -EIO;
5795 }
5796
5797 static int decode_test_stateid(struct xdr_stream *xdr,
5798                                struct nfs41_test_stateid_res *res)
5799 {
5800         __be32 *p;
5801         int status;
5802         int num_res;
5803
5804         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5805         if (status)
5806                 return status;
5807
5808         p = xdr_inline_decode(xdr, 4);
5809         if (unlikely(!p))
5810                 goto out_overflow;
5811         num_res = be32_to_cpup(p++);
5812         if (num_res != 1)
5813                 goto out;
5814
5815         p = xdr_inline_decode(xdr, 4);
5816         if (unlikely(!p))
5817                 goto out_overflow;
5818         res->status = be32_to_cpup(p++);
5819
5820         return status;
5821 out_overflow:
5822         print_overflow_msg(__func__, xdr);
5823 out:
5824         return -EIO;
5825 }
5826
5827 static int decode_free_stateid(struct xdr_stream *xdr,
5828                                struct nfs41_free_stateid_res *res)
5829 {
5830         __be32 *p;
5831         int status;
5832
5833         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5834         if (status)
5835                 return status;
5836
5837         p = xdr_inline_decode(xdr, 4);
5838         if (unlikely(!p))
5839                 goto out_overflow;
5840         res->status = be32_to_cpup(p++);
5841         return res->status;
5842 out_overflow:
5843         print_overflow_msg(__func__, xdr);
5844         return -EIO;
5845 }
5846 #endif /* CONFIG_NFS_V4_1 */
5847
5848 /*
5849  * END OF "GENERIC" DECODE ROUTINES.
5850  */
5851
5852 /*
5853  * Decode OPEN_DOWNGRADE response
5854  */
5855 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5856                                        struct xdr_stream *xdr,
5857                                        struct nfs_closeres *res)
5858 {
5859         struct compound_hdr hdr;
5860         int status;
5861
5862         status = decode_compound_hdr(xdr, &hdr);
5863         if (status)
5864                 goto out;
5865         status = decode_sequence(xdr, &res->seq_res, rqstp);
5866         if (status)
5867                 goto out;
5868         status = decode_putfh(xdr);
5869         if (status)
5870                 goto out;
5871         status = decode_open_downgrade(xdr, res);
5872         if (status != 0)
5873                 goto out;
5874         decode_getfattr(xdr, res->fattr, res->server);
5875 out:
5876         return status;
5877 }
5878
5879 /*
5880  * Decode ACCESS response
5881  */
5882 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5883                                struct nfs4_accessres *res)
5884 {
5885         struct compound_hdr hdr;
5886         int status;
5887
5888         status = decode_compound_hdr(xdr, &hdr);
5889         if (status)
5890                 goto out;
5891         status = decode_sequence(xdr, &res->seq_res, rqstp);
5892         if (status)
5893                 goto out;
5894         status = decode_putfh(xdr);
5895         if (status != 0)
5896                 goto out;
5897         status = decode_access(xdr, &res->supported, &res->access);
5898         if (status != 0)
5899                 goto out;
5900         decode_getfattr(xdr, res->fattr, res->server);
5901 out:
5902         return status;
5903 }
5904
5905 /*
5906  * Decode LOOKUP response
5907  */
5908 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5909                                struct nfs4_lookup_res *res)
5910 {
5911         struct compound_hdr hdr;
5912         int status;
5913
5914         status = decode_compound_hdr(xdr, &hdr);
5915         if (status)
5916                 goto out;
5917         status = decode_sequence(xdr, &res->seq_res, rqstp);
5918         if (status)
5919                 goto out;
5920         status = decode_putfh(xdr);
5921         if (status)
5922                 goto out;
5923         status = decode_lookup(xdr);
5924         if (status)
5925                 goto out;
5926         status = decode_getfh(xdr, res->fh);
5927         if (status)
5928                 goto out;
5929         status = decode_getfattr(xdr, res->fattr, res->server);
5930 out:
5931         return status;
5932 }
5933
5934 /*
5935  * Decode LOOKUP_ROOT response
5936  */
5937 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5938                                     struct xdr_stream *xdr,
5939                                     struct nfs4_lookup_res *res)
5940 {
5941         struct compound_hdr hdr;
5942         int status;
5943
5944         status = decode_compound_hdr(xdr, &hdr);
5945         if (status)
5946                 goto out;
5947         status = decode_sequence(xdr, &res->seq_res, rqstp);
5948         if (status)
5949                 goto out;
5950         status = decode_putrootfh(xdr);
5951         if (status)
5952                 goto out;
5953         status = decode_getfh(xdr, res->fh);
5954         if (status == 0)
5955                 status = decode_getfattr(xdr, res->fattr, res->server);
5956 out:
5957         return status;
5958 }
5959
5960 /*
5961  * Decode REMOVE response
5962  */
5963 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5964                                struct nfs_removeres *res)
5965 {
5966         struct compound_hdr hdr;
5967         int status;
5968
5969         status = decode_compound_hdr(xdr, &hdr);
5970         if (status)
5971                 goto out;
5972         status = decode_sequence(xdr, &res->seq_res, rqstp);
5973         if (status)
5974                 goto out;
5975         status = decode_putfh(xdr);
5976         if (status)
5977                 goto out;
5978         status = decode_remove(xdr, &res->cinfo);
5979 out:
5980         return status;
5981 }
5982
5983 /*
5984  * Decode RENAME response
5985  */
5986 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5987                                struct nfs_renameres *res)
5988 {
5989         struct compound_hdr hdr;
5990         int status;
5991
5992         status = decode_compound_hdr(xdr, &hdr);
5993         if (status)
5994                 goto out;
5995         status = decode_sequence(xdr, &res->seq_res, rqstp);
5996         if (status)
5997                 goto out;
5998         status = decode_putfh(xdr);
5999         if (status)
6000                 goto out;
6001         status = decode_savefh(xdr);
6002         if (status)
6003                 goto out;
6004         status = decode_putfh(xdr);
6005         if (status)
6006                 goto out;
6007         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6008 out:
6009         return status;
6010 }
6011
6012 /*
6013  * Decode LINK response
6014  */
6015 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016                              struct nfs4_link_res *res)
6017 {
6018         struct compound_hdr hdr;
6019         int status;
6020
6021         status = decode_compound_hdr(xdr, &hdr);
6022         if (status)
6023                 goto out;
6024         status = decode_sequence(xdr, &res->seq_res, rqstp);
6025         if (status)
6026                 goto out;
6027         status = decode_putfh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_savefh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_putfh(xdr);
6034         if (status)
6035                 goto out;
6036         status = decode_link(xdr, &res->cinfo);
6037         if (status)
6038                 goto out;
6039         /*
6040          * Note order: OP_LINK leaves the directory as the current
6041          *             filehandle.
6042          */
6043         status = decode_restorefh(xdr);
6044         if (status)
6045                 goto out;
6046         decode_getfattr(xdr, res->fattr, res->server);
6047 out:
6048         return status;
6049 }
6050
6051 /*
6052  * Decode CREATE response
6053  */
6054 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6055                                struct nfs4_create_res *res)
6056 {
6057         struct compound_hdr hdr;
6058         int status;
6059
6060         status = decode_compound_hdr(xdr, &hdr);
6061         if (status)
6062                 goto out;
6063         status = decode_sequence(xdr, &res->seq_res, rqstp);
6064         if (status)
6065                 goto out;
6066         status = decode_putfh(xdr);
6067         if (status)
6068                 goto out;
6069         status = decode_create(xdr, &res->dir_cinfo);
6070         if (status)
6071                 goto out;
6072         status = decode_getfh(xdr, res->fh);
6073         if (status)
6074                 goto out;
6075         decode_getfattr(xdr, res->fattr, res->server);
6076 out:
6077         return status;
6078 }
6079
6080 /*
6081  * Decode SYMLINK response
6082  */
6083 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6084                                 struct nfs4_create_res *res)
6085 {
6086         return nfs4_xdr_dec_create(rqstp, xdr, res);
6087 }
6088
6089 /*
6090  * Decode GETATTR response
6091  */
6092 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6093                                 struct nfs4_getattr_res *res)
6094 {
6095         struct compound_hdr hdr;
6096         int status;
6097
6098         status = decode_compound_hdr(xdr, &hdr);
6099         if (status)
6100                 goto out;
6101         status = decode_sequence(xdr, &res->seq_res, rqstp);
6102         if (status)
6103                 goto out;
6104         status = decode_putfh(xdr);
6105         if (status)
6106                 goto out;
6107         status = decode_getfattr(xdr, res->fattr, res->server);
6108 out:
6109         return status;
6110 }
6111
6112 /*
6113  * Encode an SETACL request
6114  */
6115 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6116                                 struct nfs_setaclargs *args)
6117 {
6118         struct compound_hdr hdr = {
6119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6120         };
6121
6122         encode_compound_hdr(xdr, req, &hdr);
6123         encode_sequence(xdr, &args->seq_args, &hdr);
6124         encode_putfh(xdr, args->fh, &hdr);
6125         encode_setacl(xdr, args, &hdr);
6126         encode_nops(&hdr);
6127 }
6128
6129 /*
6130  * Decode SETACL response
6131  */
6132 static int
6133 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6134                     struct nfs_setaclres *res)
6135 {
6136         struct compound_hdr hdr;
6137         int status;
6138
6139         status = decode_compound_hdr(xdr, &hdr);
6140         if (status)
6141                 goto out;
6142         status = decode_sequence(xdr, &res->seq_res, rqstp);
6143         if (status)
6144                 goto out;
6145         status = decode_putfh(xdr);
6146         if (status)
6147                 goto out;
6148         status = decode_setattr(xdr);
6149 out:
6150         return status;
6151 }
6152
6153 /*
6154  * Decode GETACL response
6155  */
6156 static int
6157 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6158                     struct nfs_getaclres *res)
6159 {
6160         struct compound_hdr hdr;
6161         int status;
6162
6163         if (res->acl_scratch != NULL) {
6164                 void *p = page_address(res->acl_scratch);
6165                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6166         }
6167         status = decode_compound_hdr(xdr, &hdr);
6168         if (status)
6169                 goto out;
6170         status = decode_sequence(xdr, &res->seq_res, rqstp);
6171         if (status)
6172                 goto out;
6173         status = decode_putfh(xdr);
6174         if (status)
6175                 goto out;
6176         status = decode_getacl(xdr, rqstp, res);
6177
6178 out:
6179         return status;
6180 }
6181
6182 /*
6183  * Decode CLOSE response
6184  */
6185 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6186                               struct nfs_closeres *res)
6187 {
6188         struct compound_hdr hdr;
6189         int status;
6190
6191         status = decode_compound_hdr(xdr, &hdr);
6192         if (status)
6193                 goto out;
6194         status = decode_sequence(xdr, &res->seq_res, rqstp);
6195         if (status)
6196                 goto out;
6197         status = decode_putfh(xdr);
6198         if (status)
6199                 goto out;
6200         status = decode_close(xdr, res);
6201         if (status != 0)
6202                 goto out;
6203         /*
6204          * Note: Server may do delete on close for this file
6205          *      in which case the getattr call will fail with
6206          *      an ESTALE error. Shouldn't be a problem,
6207          *      though, since fattr->valid will remain unset.
6208          */
6209         decode_getfattr(xdr, res->fattr, res->server);
6210 out:
6211         return status;
6212 }
6213
6214 /*
6215  * Decode OPEN response
6216  */
6217 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6218                              struct nfs_openres *res)
6219 {
6220         struct compound_hdr hdr;
6221         int status;
6222
6223         status = decode_compound_hdr(xdr, &hdr);
6224         if (status)
6225                 goto out;
6226         status = decode_sequence(xdr, &res->seq_res, rqstp);
6227         if (status)
6228                 goto out;
6229         status = decode_putfh(xdr);
6230         if (status)
6231                 goto out;
6232         status = decode_open(xdr, res);
6233         if (status)
6234                 goto out;
6235         status = decode_getfh(xdr, &res->fh);
6236         if (status)
6237                 goto out;
6238         if (res->access_request)
6239                 decode_access(xdr, &res->access_supported, &res->access_result);
6240         decode_getfattr(xdr, res->f_attr, res->server);
6241 out:
6242         return status;
6243 }
6244
6245 /*
6246  * Decode OPEN_CONFIRM response
6247  */
6248 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6249                                      struct xdr_stream *xdr,
6250                                      struct nfs_open_confirmres *res)
6251 {
6252         struct compound_hdr hdr;
6253         int status;
6254
6255         status = decode_compound_hdr(xdr, &hdr);
6256         if (status)
6257                 goto out;
6258         status = decode_putfh(xdr);
6259         if (status)
6260                 goto out;
6261         status = decode_open_confirm(xdr, res);
6262 out:
6263         return status;
6264 }
6265
6266 /*
6267  * Decode OPEN response
6268  */
6269 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6270                                     struct xdr_stream *xdr,
6271                                     struct nfs_openres *res)
6272 {
6273         struct compound_hdr hdr;
6274         int status;
6275
6276         status = decode_compound_hdr(xdr, &hdr);
6277         if (status)
6278                 goto out;
6279         status = decode_sequence(xdr, &res->seq_res, rqstp);
6280         if (status)
6281                 goto out;
6282         status = decode_putfh(xdr);
6283         if (status)
6284                 goto out;
6285         status = decode_open(xdr, res);
6286         if (status)
6287                 goto out;
6288         if (res->access_request)
6289                 decode_access(xdr, &res->access_supported, &res->access_result);
6290         decode_getfattr(xdr, res->f_attr, res->server);
6291 out:
6292         return status;
6293 }
6294
6295 /*
6296  * Decode SETATTR response
6297  */
6298 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6299                                 struct xdr_stream *xdr,
6300                                 struct nfs_setattrres *res)
6301 {
6302         struct compound_hdr hdr;
6303         int status;
6304
6305         status = decode_compound_hdr(xdr, &hdr);
6306         if (status)
6307                 goto out;
6308         status = decode_sequence(xdr, &res->seq_res, rqstp);
6309         if (status)
6310                 goto out;
6311         status = decode_putfh(xdr);
6312         if (status)
6313                 goto out;
6314         status = decode_setattr(xdr);
6315         if (status)
6316                 goto out;
6317         decode_getfattr(xdr, res->fattr, res->server);
6318 out:
6319         return status;
6320 }
6321
6322 /*
6323  * Decode LOCK response
6324  */
6325 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6326                              struct nfs_lock_res *res)
6327 {
6328         struct compound_hdr hdr;
6329         int status;
6330
6331         status = decode_compound_hdr(xdr, &hdr);
6332         if (status)
6333                 goto out;
6334         status = decode_sequence(xdr, &res->seq_res, rqstp);
6335         if (status)
6336                 goto out;
6337         status = decode_putfh(xdr);
6338         if (status)
6339                 goto out;
6340         status = decode_lock(xdr, res);
6341 out:
6342         return status;
6343 }
6344
6345 /*
6346  * Decode LOCKT response
6347  */
6348 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6349                               struct nfs_lockt_res *res)
6350 {
6351         struct compound_hdr hdr;
6352         int status;
6353
6354         status = decode_compound_hdr(xdr, &hdr);
6355         if (status)
6356                 goto out;
6357         status = decode_sequence(xdr, &res->seq_res, rqstp);
6358         if (status)
6359                 goto out;
6360         status = decode_putfh(xdr);
6361         if (status)
6362                 goto out;
6363         status = decode_lockt(xdr, res);
6364 out:
6365         return status;
6366 }
6367
6368 /*
6369  * Decode LOCKU response
6370  */
6371 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6372                               struct nfs_locku_res *res)
6373 {
6374         struct compound_hdr hdr;
6375         int status;
6376
6377         status = decode_compound_hdr(xdr, &hdr);
6378         if (status)
6379                 goto out;
6380         status = decode_sequence(xdr, &res->seq_res, rqstp);
6381         if (status)
6382                 goto out;
6383         status = decode_putfh(xdr);
6384         if (status)
6385                 goto out;
6386         status = decode_locku(xdr, res);
6387 out:
6388         return status;
6389 }
6390
6391 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6392                                           struct xdr_stream *xdr, void *dummy)
6393 {
6394         struct compound_hdr hdr;
6395         int status;
6396
6397         status = decode_compound_hdr(xdr, &hdr);
6398         if (!status)
6399                 status = decode_release_lockowner(xdr);
6400         return status;
6401 }
6402
6403 /*
6404  * Decode READLINK response
6405  */
6406 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6407                                  struct xdr_stream *xdr,
6408                                  struct nfs4_readlink_res *res)
6409 {
6410         struct compound_hdr hdr;
6411         int status;
6412
6413         status = decode_compound_hdr(xdr, &hdr);
6414         if (status)
6415                 goto out;
6416         status = decode_sequence(xdr, &res->seq_res, rqstp);
6417         if (status)
6418                 goto out;
6419         status = decode_putfh(xdr);
6420         if (status)
6421                 goto out;
6422         status = decode_readlink(xdr, rqstp);
6423 out:
6424         return status;
6425 }
6426
6427 /*
6428  * Decode READDIR response
6429  */
6430 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431                                 struct nfs4_readdir_res *res)
6432 {
6433         struct compound_hdr hdr;
6434         int status;
6435
6436         status = decode_compound_hdr(xdr, &hdr);
6437         if (status)
6438                 goto out;
6439         status = decode_sequence(xdr, &res->seq_res, rqstp);
6440         if (status)
6441                 goto out;
6442         status = decode_putfh(xdr);
6443         if (status)
6444                 goto out;
6445         status = decode_readdir(xdr, rqstp, res);
6446 out:
6447         return status;
6448 }
6449
6450 /*
6451  * Decode Read response
6452  */
6453 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6454                              struct nfs_readres *res)
6455 {
6456         struct compound_hdr hdr;
6457         int status;
6458
6459         status = decode_compound_hdr(xdr, &hdr);
6460         if (status)
6461                 goto out;
6462         status = decode_sequence(xdr, &res->seq_res, rqstp);
6463         if (status)
6464                 goto out;
6465         status = decode_putfh(xdr);
6466         if (status)
6467                 goto out;
6468         status = decode_read(xdr, rqstp, res);
6469         if (!status)
6470                 status = res->count;
6471 out:
6472         return status;
6473 }
6474
6475 /*
6476  * Decode WRITE response
6477  */
6478 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479                               struct nfs_writeres *res)
6480 {
6481         struct compound_hdr hdr;
6482         int status;
6483
6484         status = decode_compound_hdr(xdr, &hdr);
6485         if (status)
6486                 goto out;
6487         status = decode_sequence(xdr, &res->seq_res, rqstp);
6488         if (status)
6489                 goto out;
6490         status = decode_putfh(xdr);
6491         if (status)
6492                 goto out;
6493         status = decode_write(xdr, res);
6494         if (status)
6495                 goto out;
6496         if (res->fattr)
6497                 decode_getfattr(xdr, res->fattr, res->server);
6498         if (!status)
6499                 status = res->count;
6500 out:
6501         return status;
6502 }
6503
6504 /*
6505  * Decode COMMIT response
6506  */
6507 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6508                                struct nfs_commitres *res)
6509 {
6510         struct compound_hdr hdr;
6511         int status;
6512
6513         status = decode_compound_hdr(xdr, &hdr);
6514         if (status)
6515                 goto out;
6516         status = decode_sequence(xdr, &res->seq_res, rqstp);
6517         if (status)
6518                 goto out;
6519         status = decode_putfh(xdr);
6520         if (status)
6521                 goto out;
6522         status = decode_commit(xdr, res);
6523 out:
6524         return status;
6525 }
6526
6527 /*
6528  * Decode FSINFO response
6529  */
6530 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6531                                struct nfs4_fsinfo_res *res)
6532 {
6533         struct compound_hdr hdr;
6534         int status;
6535
6536         status = decode_compound_hdr(xdr, &hdr);
6537         if (!status)
6538                 status = decode_sequence(xdr, &res->seq_res, req);
6539         if (!status)
6540                 status = decode_putfh(xdr);
6541         if (!status)
6542                 status = decode_fsinfo(xdr, res->fsinfo);
6543         return status;
6544 }
6545
6546 /*
6547  * Decode PATHCONF response
6548  */
6549 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6550                                  struct nfs4_pathconf_res *res)
6551 {
6552         struct compound_hdr hdr;
6553         int status;
6554
6555         status = decode_compound_hdr(xdr, &hdr);
6556         if (!status)
6557                 status = decode_sequence(xdr, &res->seq_res, req);
6558         if (!status)
6559                 status = decode_putfh(xdr);
6560         if (!status)
6561                 status = decode_pathconf(xdr, res->pathconf);
6562         return status;
6563 }
6564
6565 /*
6566  * Decode STATFS response
6567  */
6568 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6569                                struct nfs4_statfs_res *res)
6570 {
6571         struct compound_hdr hdr;
6572         int status;
6573
6574         status = decode_compound_hdr(xdr, &hdr);
6575         if (!status)
6576                 status = decode_sequence(xdr, &res->seq_res, req);
6577         if (!status)
6578                 status = decode_putfh(xdr);
6579         if (!status)
6580                 status = decode_statfs(xdr, res->fsstat);
6581         return status;
6582 }
6583
6584 /*
6585  * Decode GETATTR_BITMAP response
6586  */
6587 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6588                                     struct xdr_stream *xdr,
6589                                     struct nfs4_server_caps_res *res)
6590 {
6591         struct compound_hdr hdr;
6592         int status;
6593
6594         status = decode_compound_hdr(xdr, &hdr);
6595         if (status)
6596                 goto out;
6597         status = decode_sequence(xdr, &res->seq_res, req);
6598         if (status)
6599                 goto out;
6600         status = decode_putfh(xdr);
6601         if (status)
6602                 goto out;
6603         status = decode_server_caps(xdr, res);
6604 out:
6605         return status;
6606 }
6607
6608 /*
6609  * Decode RENEW response
6610  */
6611 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6612                               void *__unused)
6613 {
6614         struct compound_hdr hdr;
6615         int status;
6616
6617         status = decode_compound_hdr(xdr, &hdr);
6618         if (!status)
6619                 status = decode_renew(xdr);
6620         return status;
6621 }
6622
6623 /*
6624  * Decode SETCLIENTID response
6625  */
6626 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6627                                     struct xdr_stream *xdr,
6628                                     struct nfs4_setclientid_res *res)
6629 {
6630         struct compound_hdr hdr;
6631         int status;
6632
6633         status = decode_compound_hdr(xdr, &hdr);
6634         if (!status)
6635                 status = decode_setclientid(xdr, res);
6636         return status;
6637 }
6638
6639 /*
6640  * Decode SETCLIENTID_CONFIRM response
6641  */
6642 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6643                                             struct xdr_stream *xdr)
6644 {
6645         struct compound_hdr hdr;
6646         int status;
6647
6648         status = decode_compound_hdr(xdr, &hdr);
6649         if (!status)
6650                 status = decode_setclientid_confirm(xdr);
6651         return status;
6652 }
6653
6654 /*
6655  * Decode DELEGRETURN response
6656  */
6657 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6658                                     struct xdr_stream *xdr,
6659                                     struct nfs4_delegreturnres *res)
6660 {
6661         struct compound_hdr hdr;
6662         int status;
6663
6664         status = decode_compound_hdr(xdr, &hdr);
6665         if (status)
6666                 goto out;
6667         status = decode_sequence(xdr, &res->seq_res, rqstp);
6668         if (status)
6669                 goto out;
6670         status = decode_putfh(xdr);
6671         if (status != 0)
6672                 goto out;
6673         status = decode_getfattr(xdr, res->fattr, res->server);
6674         if (status != 0)
6675                 goto out;
6676         status = decode_delegreturn(xdr);
6677 out:
6678         return status;
6679 }
6680
6681 /*
6682  * Decode FS_LOCATIONS response
6683  */
6684 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6685                                      struct xdr_stream *xdr,
6686                                      struct nfs4_fs_locations_res *res)
6687 {
6688         struct compound_hdr hdr;
6689         int status;
6690
6691         status = decode_compound_hdr(xdr, &hdr);
6692         if (status)
6693                 goto out;
6694         status = decode_sequence(xdr, &res->seq_res, req);
6695         if (status)
6696                 goto out;
6697         status = decode_putfh(xdr);
6698         if (status)
6699                 goto out;
6700         status = decode_lookup(xdr);
6701         if (status)
6702                 goto out;
6703         xdr_enter_page(xdr, PAGE_SIZE);
6704         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6705                                          NULL, res->fs_locations,
6706                                          res->fs_locations->server);
6707 out:
6708         return status;
6709 }
6710
6711 /*
6712  * Decode SECINFO response
6713  */
6714 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6715                                 struct xdr_stream *xdr,
6716                                 struct nfs4_secinfo_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, rqstp);
6725         if (status)
6726                 goto out;
6727         status = decode_putfh(xdr);
6728         if (status)
6729                 goto out;
6730         status = decode_secinfo(xdr, res);
6731 out:
6732         return status;
6733 }
6734
6735 #if defined(CONFIG_NFS_V4_1)
6736 /*
6737  * Decode BIND_CONN_TO_SESSION response
6738  */
6739 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6740                                         struct xdr_stream *xdr,
6741                                         void *res)
6742 {
6743         struct compound_hdr hdr;
6744         int status;
6745
6746         status = decode_compound_hdr(xdr, &hdr);
6747         if (!status)
6748                 status = decode_bind_conn_to_session(xdr, res);
6749         return status;
6750 }
6751
6752 /*
6753  * Decode EXCHANGE_ID response
6754  */
6755 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6756                                     struct xdr_stream *xdr,
6757                                     void *res)
6758 {
6759         struct compound_hdr hdr;
6760         int status;
6761
6762         status = decode_compound_hdr(xdr, &hdr);
6763         if (!status)
6764                 status = decode_exchange_id(xdr, res);
6765         return status;
6766 }
6767
6768 /*
6769  * Decode CREATE_SESSION response
6770  */
6771 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6772                                        struct xdr_stream *xdr,
6773                                        struct nfs41_create_session_res *res)
6774 {
6775         struct compound_hdr hdr;
6776         int status;
6777
6778         status = decode_compound_hdr(xdr, &hdr);
6779         if (!status)
6780                 status = decode_create_session(xdr, res);
6781         return status;
6782 }
6783
6784 /*
6785  * Decode DESTROY_SESSION response
6786  */
6787 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6788                                         struct xdr_stream *xdr,
6789                                         void *res)
6790 {
6791         struct compound_hdr hdr;
6792         int status;
6793
6794         status = decode_compound_hdr(xdr, &hdr);
6795         if (!status)
6796                 status = decode_destroy_session(xdr, res);
6797         return status;
6798 }
6799
6800 /*
6801  * Decode DESTROY_CLIENTID response
6802  */
6803 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6804                                         struct xdr_stream *xdr,
6805                                         void *res)
6806 {
6807         struct compound_hdr hdr;
6808         int status;
6809
6810         status = decode_compound_hdr(xdr, &hdr);
6811         if (!status)
6812                 status = decode_destroy_clientid(xdr, res);
6813         return status;
6814 }
6815
6816 /*
6817  * Decode SEQUENCE response
6818  */
6819 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6820                                  struct xdr_stream *xdr,
6821                                  struct nfs4_sequence_res *res)
6822 {
6823         struct compound_hdr hdr;
6824         int status;
6825
6826         status = decode_compound_hdr(xdr, &hdr);
6827         if (!status)
6828                 status = decode_sequence(xdr, res, rqstp);
6829         return status;
6830 }
6831
6832 /*
6833  * Decode GET_LEASE_TIME response
6834  */
6835 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6836                                        struct xdr_stream *xdr,
6837                                        struct nfs4_get_lease_time_res *res)
6838 {
6839         struct compound_hdr hdr;
6840         int status;
6841
6842         status = decode_compound_hdr(xdr, &hdr);
6843         if (!status)
6844                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6845         if (!status)
6846                 status = decode_putrootfh(xdr);
6847         if (!status)
6848                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6849         return status;
6850 }
6851
6852 /*
6853  * Decode RECLAIM_COMPLETE response
6854  */
6855 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6856                                          struct xdr_stream *xdr,
6857                                          struct nfs41_reclaim_complete_res *res)
6858 {
6859         struct compound_hdr hdr;
6860         int status;
6861
6862         status = decode_compound_hdr(xdr, &hdr);
6863         if (!status)
6864                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6865         if (!status)
6866                 status = decode_reclaim_complete(xdr, (void *)NULL);
6867         return status;
6868 }
6869
6870 /*
6871  * Decode GETDEVICELIST response
6872  */
6873 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6874                                       struct xdr_stream *xdr,
6875                                       struct nfs4_getdevicelist_res *res)
6876 {
6877         struct compound_hdr hdr;
6878         int status;
6879
6880         dprintk("encoding getdevicelist!\n");
6881
6882         status = decode_compound_hdr(xdr, &hdr);
6883         if (status != 0)
6884                 goto out;
6885         status = decode_sequence(xdr, &res->seq_res, rqstp);
6886         if (status != 0)
6887                 goto out;
6888         status = decode_putfh(xdr);
6889         if (status != 0)
6890                 goto out;
6891         status = decode_getdevicelist(xdr, res->devlist);
6892 out:
6893         return status;
6894 }
6895
6896 /*
6897  * Decode GETDEVINFO response
6898  */
6899 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6900                                       struct xdr_stream *xdr,
6901                                       struct nfs4_getdeviceinfo_res *res)
6902 {
6903         struct compound_hdr hdr;
6904         int status;
6905
6906         status = decode_compound_hdr(xdr, &hdr);
6907         if (status != 0)
6908                 goto out;
6909         status = decode_sequence(xdr, &res->seq_res, rqstp);
6910         if (status != 0)
6911                 goto out;
6912         status = decode_getdeviceinfo(xdr, res->pdev);
6913 out:
6914         return status;
6915 }
6916
6917 /*
6918  * Decode LAYOUTGET response
6919  */
6920 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6921                                   struct xdr_stream *xdr,
6922                                   struct nfs4_layoutget_res *res)
6923 {
6924         struct compound_hdr hdr;
6925         int status;
6926
6927         status = decode_compound_hdr(xdr, &hdr);
6928         if (status)
6929                 goto out;
6930         status = decode_sequence(xdr, &res->seq_res, rqstp);
6931         if (status)
6932                 goto out;
6933         status = decode_putfh(xdr);
6934         if (status)
6935                 goto out;
6936         status = decode_layoutget(xdr, rqstp, res);
6937 out:
6938         return status;
6939 }
6940
6941 /*
6942  * Decode LAYOUTRETURN response
6943  */
6944 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6945                                      struct xdr_stream *xdr,
6946                                      struct nfs4_layoutreturn_res *res)
6947 {
6948         struct compound_hdr hdr;
6949         int status;
6950
6951         status = decode_compound_hdr(xdr, &hdr);
6952         if (status)
6953                 goto out;
6954         status = decode_sequence(xdr, &res->seq_res, rqstp);
6955         if (status)
6956                 goto out;
6957         status = decode_putfh(xdr);
6958         if (status)
6959                 goto out;
6960         status = decode_layoutreturn(xdr, res);
6961 out:
6962         return status;
6963 }
6964
6965 /*
6966  * Decode LAYOUTCOMMIT response
6967  */
6968 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6969                                      struct xdr_stream *xdr,
6970                                      struct nfs4_layoutcommit_res *res)
6971 {
6972         struct compound_hdr hdr;
6973         int status;
6974
6975         status = decode_compound_hdr(xdr, &hdr);
6976         if (status)
6977                 goto out;
6978         status = decode_sequence(xdr, &res->seq_res, rqstp);
6979         if (status)
6980                 goto out;
6981         status = decode_putfh(xdr);
6982         if (status)
6983                 goto out;
6984         status = decode_layoutcommit(xdr, rqstp, res);
6985         if (status)
6986                 goto out;
6987         decode_getfattr(xdr, res->fattr, res->server);
6988 out:
6989         return status;
6990 }
6991
6992 /*
6993  * Decode SECINFO_NO_NAME response
6994  */
6995 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6996                                         struct xdr_stream *xdr,
6997                                         struct nfs4_secinfo_res *res)
6998 {
6999         struct compound_hdr hdr;
7000         int status;
7001
7002         status = decode_compound_hdr(xdr, &hdr);
7003         if (status)
7004                 goto out;
7005         status = decode_sequence(xdr, &res->seq_res, rqstp);
7006         if (status)
7007                 goto out;
7008         status = decode_putrootfh(xdr);
7009         if (status)
7010                 goto out;
7011         status = decode_secinfo_no_name(xdr, res);
7012 out:
7013         return status;
7014 }
7015
7016 /*
7017  * Decode TEST_STATEID response
7018  */
7019 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7020                                      struct xdr_stream *xdr,
7021                                      struct nfs41_test_stateid_res *res)
7022 {
7023         struct compound_hdr hdr;
7024         int status;
7025
7026         status = decode_compound_hdr(xdr, &hdr);
7027         if (status)
7028                 goto out;
7029         status = decode_sequence(xdr, &res->seq_res, rqstp);
7030         if (status)
7031                 goto out;
7032         status = decode_test_stateid(xdr, res);
7033 out:
7034         return status;
7035 }
7036
7037 /*
7038  * Decode FREE_STATEID response
7039  */
7040 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7041                                      struct xdr_stream *xdr,
7042                                      struct nfs41_free_stateid_res *res)
7043 {
7044         struct compound_hdr hdr;
7045         int status;
7046
7047         status = decode_compound_hdr(xdr, &hdr);
7048         if (status)
7049                 goto out;
7050         status = decode_sequence(xdr, &res->seq_res, rqstp);
7051         if (status)
7052                 goto out;
7053         status = decode_free_stateid(xdr, res);
7054 out:
7055         return status;
7056 }
7057 #endif /* CONFIG_NFS_V4_1 */
7058
7059 /**
7060  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7061  *                      the local page cache.
7062  * @xdr: XDR stream where entry resides
7063  * @entry: buffer to fill in with entry data
7064  * @plus: boolean indicating whether this should be a readdirplus entry
7065  *
7066  * Returns zero if successful, otherwise a negative errno value is
7067  * returned.
7068  *
7069  * This function is not invoked during READDIR reply decoding, but
7070  * rather whenever an application invokes the getdents(2) system call
7071  * on a directory already in our cache.
7072  */
7073 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7074                        int plus)
7075 {
7076         unsigned int savep;
7077         uint32_t bitmap[3] = {0};
7078         uint32_t len;
7079         __be32 *p = xdr_inline_decode(xdr, 4);
7080         if (unlikely(!p))
7081                 goto out_overflow;
7082         if (*p == xdr_zero) {
7083                 p = xdr_inline_decode(xdr, 4);
7084                 if (unlikely(!p))
7085                         goto out_overflow;
7086                 if (*p == xdr_zero)
7087                         return -EAGAIN;
7088                 entry->eof = 1;
7089                 return -EBADCOOKIE;
7090         }
7091
7092         p = xdr_inline_decode(xdr, 12);
7093         if (unlikely(!p))
7094                 goto out_overflow;
7095         entry->prev_cookie = entry->cookie;
7096         p = xdr_decode_hyper(p, &entry->cookie);
7097         entry->len = be32_to_cpup(p);
7098
7099         p = xdr_inline_decode(xdr, entry->len);
7100         if (unlikely(!p))
7101                 goto out_overflow;
7102         entry->name = (const char *) p;
7103
7104         /*
7105          * In case the server doesn't return an inode number,
7106          * we fake one here.  (We don't use inode number 0,
7107          * since glibc seems to choke on it...)
7108          */
7109         entry->ino = 1;
7110         entry->fattr->valid = 0;
7111
7112         if (decode_attr_bitmap(xdr, bitmap) < 0)
7113                 goto out_overflow;
7114
7115         if (decode_attr_length(xdr, &len, &savep) < 0)
7116                 goto out_overflow;
7117
7118         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7119                                   NULL, entry->server) < 0)
7120                 goto out_overflow;
7121         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7122                 entry->ino = entry->fattr->mounted_on_fileid;
7123         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7124                 entry->ino = entry->fattr->fileid;
7125
7126         entry->d_type = DT_UNKNOWN;
7127         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7128                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7129
7130         return 0;
7131
7132 out_overflow:
7133         print_overflow_msg(__func__, xdr);
7134         return -EAGAIN;
7135 }
7136
7137 /*
7138  * We need to translate between nfs status return values and
7139  * the local errno values which may not be the same.
7140  */
7141 static struct {
7142         int stat;
7143         int errno;
7144 } nfs_errtbl[] = {
7145         { NFS4_OK,              0               },
7146         { NFS4ERR_PERM,         -EPERM          },
7147         { NFS4ERR_NOENT,        -ENOENT         },
7148         { NFS4ERR_IO,           -errno_NFSERR_IO},
7149         { NFS4ERR_NXIO,         -ENXIO          },
7150         { NFS4ERR_ACCESS,       -EACCES         },
7151         { NFS4ERR_EXIST,        -EEXIST         },
7152         { NFS4ERR_XDEV,         -EXDEV          },
7153         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7154         { NFS4ERR_ISDIR,        -EISDIR         },
7155         { NFS4ERR_INVAL,        -EINVAL         },
7156         { NFS4ERR_FBIG,         -EFBIG          },
7157         { NFS4ERR_NOSPC,        -ENOSPC         },
7158         { NFS4ERR_ROFS,         -EROFS          },
7159         { NFS4ERR_MLINK,        -EMLINK         },
7160         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7161         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7162         { NFS4ERR_DQUOT,        -EDQUOT         },
7163         { NFS4ERR_STALE,        -ESTALE         },
7164         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7165         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7166         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7167         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7168         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7169         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7170         { NFS4ERR_LOCKED,       -EAGAIN         },
7171         { NFS4ERR_SYMLINK,      -ELOOP          },
7172         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7173         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7174         { -1,                   -EIO            }
7175 };
7176
7177 /*
7178  * Convert an NFS error code to a local one.
7179  * This one is used jointly by NFSv2 and NFSv3.
7180  */
7181 static int
7182 nfs4_stat_to_errno(int stat)
7183 {
7184         int i;
7185         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7186                 if (nfs_errtbl[i].stat == stat)
7187                         return nfs_errtbl[i].errno;
7188         }
7189         if (stat <= 10000 || stat > 10100) {
7190                 /* The server is looney tunes. */
7191                 return -EREMOTEIO;
7192         }
7193         /* If we cannot translate the error, the recovery routines should
7194          * handle it.
7195          * Note: remaining NFSv4 error codes have values > 10000, so should
7196          * not conflict with native Linux error codes.
7197          */
7198         return -stat;
7199 }
7200
7201 #define PROC(proc, argtype, restype)                            \
7202 [NFSPROC4_CLNT_##proc] = {                                      \
7203         .p_proc   = NFSPROC4_COMPOUND,                          \
7204         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7205         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7206         .p_arglen = NFS4_##argtype##_sz,                        \
7207         .p_replen = NFS4_##restype##_sz,                        \
7208         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7209         .p_name   = #proc,                                      \
7210 }
7211
7212 struct rpc_procinfo     nfs4_procedures[] = {
7213         PROC(READ,              enc_read,               dec_read),
7214         PROC(WRITE,             enc_write,              dec_write),
7215         PROC(COMMIT,            enc_commit,             dec_commit),
7216         PROC(OPEN,              enc_open,               dec_open),
7217         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7218         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7219         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7220         PROC(CLOSE,             enc_close,              dec_close),
7221         PROC(SETATTR,           enc_setattr,            dec_setattr),
7222         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7223         PROC(RENEW,             enc_renew,              dec_renew),
7224         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7225         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7226         PROC(LOCK,              enc_lock,               dec_lock),
7227         PROC(LOCKT,             enc_lockt,              dec_lockt),
7228         PROC(LOCKU,             enc_locku,              dec_locku),
7229         PROC(ACCESS,            enc_access,             dec_access),
7230         PROC(GETATTR,           enc_getattr,            dec_getattr),
7231         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7232         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7233         PROC(REMOVE,            enc_remove,             dec_remove),
7234         PROC(RENAME,            enc_rename,             dec_rename),
7235         PROC(LINK,              enc_link,               dec_link),
7236         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7237         PROC(CREATE,            enc_create,             dec_create),
7238         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7239         PROC(STATFS,            enc_statfs,             dec_statfs),
7240         PROC(READLINK,          enc_readlink,           dec_readlink),
7241         PROC(READDIR,           enc_readdir,            dec_readdir),
7242         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7243         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7244         PROC(GETACL,            enc_getacl,             dec_getacl),
7245         PROC(SETACL,            enc_setacl,             dec_setacl),
7246         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7247         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7248         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7249 #if defined(CONFIG_NFS_V4_1)
7250         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7251         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7252         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7253         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7254         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7255         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7256         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7257         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7258         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7259         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7260         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7261         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7262         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7263         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7264         PROC(BIND_CONN_TO_SESSION,
7265                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7266         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7267 #endif /* CONFIG_NFS_V4_1 */
7268 };
7269
7270 const struct rpc_version nfs_version4 = {
7271         .number                 = 4,
7272         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7273         .procs                  = nfs4_procedures
7274 };
7275
7276 /*
7277  * Local variables:
7278  *  c-basic-offset: 8
7279  * End:
7280  */