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         uint32_t bmval2 = 0;
 983
 984         /*
 985          * We reserve enough space to write the entire attribute buffer at once.
 986          * In the worst-case, this would be
 987          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 988          * = 40 bytes, plus any contribution from variable-length fields
 989          *            such as owner/group.
 990          */
 991         len = 20;
 992
 993         /* Sigh */
 994         if (iap->ia_valid & ATTR_SIZE)
 995                 len += 8;
 996         if (iap->ia_valid & ATTR_MODE)
 997                 len += 4;
 998         if (iap->ia_valid & ATTR_UID) {
 999                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1000                 if (owner_namelen < 0) {
1001                         dprintk("nfs: couldn't resolve uid %d to string\n",
1002                                         from_kuid(&init_user_ns, iap->ia_uid));
1003                         /* XXX */
1004                         strcpy(owner_name, "nobody");
1005                         owner_namelen = sizeof("nobody") - 1;
1006                         /* goto out; */
1007                 }
1008                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1009         }
1010         if (iap->ia_valid & ATTR_GID) {
1011                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1012                 if (owner_grouplen < 0) {
1013                         dprintk("nfs: couldn't resolve gid %d to string\n",
1014                                         from_kgid(&init_user_ns, iap->ia_gid));
1015                         strcpy(owner_group, "nobody");
1016                         owner_grouplen = sizeof("nobody") - 1;
1017                         /* goto out; */
1018                 }
1019                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1020         }
1021         if (iap->ia_valid & ATTR_ATIME_SET)
1022                 len += 16;
1023         else if (iap->ia_valid & ATTR_ATIME)
1024                 len += 4;
1025         if (iap->ia_valid & ATTR_MTIME_SET)
1026                 len += 16;
1027         else if (iap->ia_valid & ATTR_MTIME)
1028                 len += 4;
1029         p = reserve_space(xdr, len);
1030
1031         /*
1032          * We write the bitmap length now, but leave the bitmap and the attribute
1033          * buffer length to be backfilled at the end of this routine.
1034          */
1035         *p++ = cpu_to_be32(3);
1036         q = p;
1037         p += 4;
1038
1039         if (iap->ia_valid & ATTR_SIZE) {
1040                 bmval0 |= FATTR4_WORD0_SIZE;
1041                 p = xdr_encode_hyper(p, iap->ia_size);
1042         }
1043         if (iap->ia_valid & ATTR_MODE) {
1044                 bmval1 |= FATTR4_WORD1_MODE;
1045                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1046         }
1047         if (iap->ia_valid & ATTR_UID) {
1048                 bmval1 |= FATTR4_WORD1_OWNER;
1049                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1050         }
1051         if (iap->ia_valid & ATTR_GID) {
1052                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1053                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1054         }
1055         if (iap->ia_valid & ATTR_ATIME_SET) {
1056                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1057                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1058                 p = xdr_encode_hyper(p, (s64)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 = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1069                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1070         }
1071         else if (iap->ia_valid & ATTR_MTIME) {
1072                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1073                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1074         }
1075
1076         /*
1077          * Now we backfill the bitmap and the attribute buffer length.
1078          */
1079         if (len != ((char *)p - (char *)q) + 4) {
1080                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1081                                 len, ((char *)p - (char *)q) + 4);
1082                 BUG();
1083         }
1084         len = (char *)p - (char *)q - 16;
1085         *q++ = htonl(bmval0);
1086         *q++ = htonl(bmval1);
1087         *q++ = htonl(bmval2);
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_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1194                            bitmask[1] & nfs4_fattr_bitmap[1],
1195                            bitmask[2] & nfs4_fattr_bitmap[2],
1196                            hdr);
1197 }
1198
1199 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1200                                  const u32 *open_bitmap,
1201                                  struct compound_hdr *hdr)
1202 {
1203         encode_getattr_three(xdr,
1204                              bitmask[0] & open_bitmap[0],
1205                              bitmask[1] & open_bitmap[1],
1206                              bitmask[2] & open_bitmap[2],
1207                              hdr);
1208 }
1209
1210 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1211 {
1212         encode_getattr_three(xdr,
1213                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1214                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1215                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1216                              hdr);
1217 }
1218
1219 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1220 {
1221         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1222                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1223 }
1224
1225 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1226 {
1227         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1228 }
1229
1230 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1231 {
1232         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1233         encode_string(xdr, name->len, name->name);
1234 }
1235
1236 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1237 {
1238         if (fl->fl_type == F_RDLCK)
1239                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1240         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1241 }
1242
1243 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1244 {
1245         if (fl->fl_end == OFFSET_MAX)
1246                 return ~(uint64_t)0;
1247         return fl->fl_end - fl->fl_start + 1;
1248 }
1249
1250 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1251 {
1252         __be32 *p;
1253
1254         p = reserve_space(xdr, 32);
1255         p = xdr_encode_hyper(p, lowner->clientid);
1256         *p++ = cpu_to_be32(20);
1257         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1258         *p++ = cpu_to_be32(lowner->s_dev);
1259         xdr_encode_hyper(p, lowner->id);
1260 }
1261
1262 /*
1263  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1264  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1265  */
1266 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1271         p = reserve_space(xdr, 28);
1272         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1273         *p++ = cpu_to_be32(args->reclaim);
1274         p = xdr_encode_hyper(p, args->fl->fl_start);
1275         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1276         *p = cpu_to_be32(args->new_lock_owner);
1277         if (args->new_lock_owner){
1278                 encode_nfs4_seqid(xdr, args->open_seqid);
1279                 encode_nfs4_stateid(xdr, args->open_stateid);
1280                 encode_nfs4_seqid(xdr, args->lock_seqid);
1281                 encode_lockowner(xdr, &args->lock_owner);
1282         }
1283         else {
1284                 encode_nfs4_stateid(xdr, args->lock_stateid);
1285                 encode_nfs4_seqid(xdr, args->lock_seqid);
1286         }
1287 }
1288
1289 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1294         p = reserve_space(xdr, 20);
1295         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1296         p = xdr_encode_hyper(p, args->fl->fl_start);
1297         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1298         encode_lockowner(xdr, &args->lock_owner);
1299 }
1300
1301 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1302 {
1303         __be32 *p;
1304
1305         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1306         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1307         encode_nfs4_seqid(xdr, args->seqid);
1308         encode_nfs4_stateid(xdr, args->stateid);
1309         p = reserve_space(xdr, 16);
1310         p = xdr_encode_hyper(p, args->fl->fl_start);
1311         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1312 }
1313
1314 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1315 {
1316         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1317         encode_lockowner(xdr, lowner);
1318 }
1319
1320 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1321 {
1322         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1323         encode_string(xdr, name->len, name->name);
1324 }
1325
1326 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1327 {
1328         __be32 *p;
1329
1330         p = reserve_space(xdr, 8);
1331         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1332         case FMODE_READ:
1333                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1334                 break;
1335         case FMODE_WRITE:
1336                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1337                 break;
1338         case FMODE_READ|FMODE_WRITE:
1339                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1340                 break;
1341         default:
1342                 *p++ = cpu_to_be32(0);
1343         }
1344         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1345 }
1346
1347 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1348 {
1349         __be32 *p;
1350  /*
1351  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1352  * owner 4 = 32
1353  */
1354         encode_nfs4_seqid(xdr, arg->seqid);
1355         encode_share_access(xdr, arg->fmode);
1356         p = reserve_space(xdr, 36);
1357         p = xdr_encode_hyper(p, arg->clientid);
1358         *p++ = cpu_to_be32(24);
1359         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1360         *p++ = cpu_to_be32(arg->server->s_dev);
1361         *p++ = cpu_to_be32(arg->id.uniquifier);
1362         xdr_encode_hyper(p, arg->id.create_time);
1363 }
1364
1365 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1366 {
1367         struct iattr dummy;
1368         __be32 *p;
1369
1370         p = reserve_space(xdr, 4);
1371         switch(arg->createmode) {
1372         case NFS4_CREATE_UNCHECKED:
1373                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1374                 encode_attrs(xdr, arg->u.attrs, arg->server);
1375                 break;
1376         case NFS4_CREATE_GUARDED:
1377                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1378                 encode_attrs(xdr, arg->u.attrs, arg->server);
1379                 break;
1380         case NFS4_CREATE_EXCLUSIVE:
1381                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1382                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1383                 break;
1384         case NFS4_CREATE_EXCLUSIVE4_1:
1385                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1386                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1387                 dummy.ia_valid = 0;
1388                 encode_attrs(xdr, &dummy, arg->server);
1389         }
1390 }
1391
1392 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1393 {
1394         __be32 *p;
1395
1396         p = reserve_space(xdr, 4);
1397         switch (arg->open_flags & O_CREAT) {
1398         case 0:
1399                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1400                 break;
1401         default:
1402                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1403                 encode_createmode(xdr, arg);
1404         }
1405 }
1406
1407 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1408 {
1409         __be32 *p;
1410
1411         p = reserve_space(xdr, 4);
1412         switch (delegation_type) {
1413         case 0:
1414                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1415                 break;
1416         case FMODE_READ:
1417                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1418                 break;
1419         case FMODE_WRITE|FMODE_READ:
1420                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1421                 break;
1422         default:
1423                 BUG();
1424         }
1425 }
1426
1427 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1433         encode_string(xdr, name->len, name->name);
1434 }
1435
1436 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4);
1441         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1442         encode_delegation_type(xdr, type);
1443 }
1444
1445 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1446 {
1447         __be32 *p;
1448
1449         p = reserve_space(xdr, 4);
1450         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1451         encode_nfs4_stateid(xdr, stateid);
1452         encode_string(xdr, name->len, name->name);
1453 }
1454
1455 static inline void encode_claim_fh(struct xdr_stream *xdr)
1456 {
1457         __be32 *p;
1458
1459         p = reserve_space(xdr, 4);
1460         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1461 }
1462
1463 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1464 {
1465         __be32 *p;
1466
1467         p = reserve_space(xdr, 4);
1468         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1469         encode_nfs4_stateid(xdr, stateid);
1470 }
1471
1472 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1473 {
1474         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1475         encode_openhdr(xdr, arg);
1476         encode_opentype(xdr, arg);
1477         switch (arg->claim) {
1478         case NFS4_OPEN_CLAIM_NULL:
1479                 encode_claim_null(xdr, arg->name);
1480                 break;
1481         case NFS4_OPEN_CLAIM_PREVIOUS:
1482                 encode_claim_previous(xdr, arg->u.delegation_type);
1483                 break;
1484         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1485                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1486                 break;
1487         case NFS4_OPEN_CLAIM_FH:
1488                 encode_claim_fh(xdr);
1489                 break;
1490         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1491                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1492                 break;
1493         default:
1494                 BUG();
1495         }
1496 }
1497
1498 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1499 {
1500         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1501         encode_nfs4_stateid(xdr, arg->stateid);
1502         encode_nfs4_seqid(xdr, arg->seqid);
1503 }
1504
1505 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1506 {
1507         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1508         encode_nfs4_stateid(xdr, arg->stateid);
1509         encode_nfs4_seqid(xdr, arg->seqid);
1510         encode_share_access(xdr, arg->fmode);
1511 }
1512
1513 static void
1514 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1515 {
1516         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1517         encode_string(xdr, fh->size, fh->data);
1518 }
1519
1520 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1521 {
1522         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1523 }
1524
1525 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1526 {
1527         __be32 *p;
1528
1529         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1530         encode_nfs4_stateid(xdr, &args->stateid);
1531
1532         p = reserve_space(xdr, 12);
1533         p = xdr_encode_hyper(p, args->offset);
1534         *p = cpu_to_be32(args->count);
1535 }
1536
1537 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1538 {
1539         uint32_t attrs[2] = {
1540                 FATTR4_WORD0_RDATTR_ERROR,
1541                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1542         };
1543         uint32_t dircount = readdir->count >> 1;
1544         __be32 *p, verf[2];
1545
1546         if (readdir->plus) {
1547                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1548                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1549                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1550                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1551                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1552                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1553                 dircount >>= 1;
1554         }
1555         /* Use mounted_on_fileid only if the server supports it */
1556         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1557                 attrs[0] |= FATTR4_WORD0_FILEID;
1558
1559         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1560         encode_uint64(xdr, readdir->cookie);
1561         encode_nfs4_verifier(xdr, &readdir->verifier);
1562         p = reserve_space(xdr, 20);
1563         *p++ = cpu_to_be32(dircount);
1564         *p++ = cpu_to_be32(readdir->count);
1565         *p++ = cpu_to_be32(2);
1566
1567         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1568         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1569         memcpy(verf, readdir->verifier.data, sizeof(verf));
1570         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1571                         __func__,
1572                         (unsigned long long)readdir->cookie,
1573                         verf[0], verf[1],
1574                         attrs[0] & readdir->bitmask[0],
1575                         attrs[1] & readdir->bitmask[1]);
1576 }
1577
1578 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1579 {
1580         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1581 }
1582
1583 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1584 {
1585         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1586         encode_string(xdr, name->len, name->name);
1587 }
1588
1589 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1590 {
1591         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1592         encode_string(xdr, oldname->len, oldname->name);
1593         encode_string(xdr, newname->len, newname->name);
1594 }
1595
1596 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1597                          struct compound_hdr *hdr)
1598 {
1599         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1600         encode_uint64(xdr, clid);
1601 }
1602
1603 static void
1604 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1605 {
1606         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1607 }
1608
1609 static void
1610 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1611 {
1612         __be32 *p;
1613
1614         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1615         encode_nfs4_stateid(xdr, &zero_stateid);
1616         p = reserve_space(xdr, 2*4);
1617         *p++ = cpu_to_be32(1);
1618         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1619         p = reserve_space(xdr, 4);
1620         *p = cpu_to_be32(arg->acl_len);
1621         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1622 }
1623
1624 static void
1625 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1626 {
1627         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1628 }
1629
1630 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1633         encode_nfs4_stateid(xdr, &arg->stateid);
1634         encode_attrs(xdr, arg->iap, server);
1635 }
1636
1637 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1638 {
1639         __be32 *p;
1640
1641         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1642         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1643
1644         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1645         p = reserve_space(xdr, 4);
1646         *p = cpu_to_be32(setclientid->sc_prog);
1647         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1648         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1649         p = reserve_space(xdr, 4);
1650         *p = cpu_to_be32(setclientid->sc_cb_ident);
1651 }
1652
1653 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1654 {
1655         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1656                         decode_setclientid_confirm_maxsz, hdr);
1657         encode_uint64(xdr, arg->clientid);
1658         encode_nfs4_verifier(xdr, &arg->confirm);
1659 }
1660
1661 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1662 {
1663         __be32 *p;
1664
1665         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1666         encode_nfs4_stateid(xdr, &args->stateid);
1667
1668         p = reserve_space(xdr, 16);
1669         p = xdr_encode_hyper(p, args->offset);
1670         *p++ = cpu_to_be32(args->stable);
1671         *p = cpu_to_be32(args->count);
1672
1673         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1674 }
1675
1676 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1677 {
1678         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1679         encode_nfs4_stateid(xdr, stateid);
1680 }
1681
1682 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1683 {
1684         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1685         encode_string(xdr, name->len, name->name);
1686 }
1687
1688 #if defined(CONFIG_NFS_V4_1)
1689 /* NFSv4.1 operations */
1690 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1691                                    struct nfs4_session *session,
1692                                    struct compound_hdr *hdr)
1693 {
1694         __be32 *p;
1695
1696         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1697                 decode_bind_conn_to_session_maxsz, hdr);
1698         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1699         p = xdr_reserve_space(xdr, 8);
1700         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1701         *p = 0; /* use_conn_in_rdma_mode = False */
1702 }
1703
1704 static void encode_exchange_id(struct xdr_stream *xdr,
1705                                struct nfs41_exchange_id_args *args,
1706                                struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709         char impl_name[IMPL_NAME_LIMIT];
1710         int len = 0;
1711
1712         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1713         encode_nfs4_verifier(xdr, args->verifier);
1714
1715         encode_string(xdr, args->id_len, args->id);
1716
1717         p = reserve_space(xdr, 12);
1718         *p++ = cpu_to_be32(args->flags);
1719         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1720
1721         if (send_implementation_id &&
1722             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1723             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1724                 <= sizeof(impl_name) + 1)
1725                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1726                                utsname()->sysname, utsname()->release,
1727                                utsname()->version, utsname()->machine);
1728
1729         if (len > 0) {
1730                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1731
1732                 encode_string(xdr,
1733                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1734                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1735                 encode_string(xdr, len, impl_name);
1736                 /* just send zeros for nii_date - the date is in nii_name */
1737                 p = reserve_space(xdr, 12);
1738                 p = xdr_encode_hyper(p, 0);
1739                 *p = cpu_to_be32(0);
1740         } else
1741                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1742 }
1743
1744 static void encode_create_session(struct xdr_stream *xdr,
1745                                   struct nfs41_create_session_args *args,
1746                                   struct compound_hdr *hdr)
1747 {
1748         __be32 *p;
1749         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1750         uint32_t len;
1751         struct nfs_client *clp = args->client;
1752         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1753         u32 max_resp_sz_cached;
1754
1755         /*
1756          * Assumes OPEN is the biggest non-idempotent compound.
1757          * 2 is the verifier.
1758          */
1759         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1760                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1761
1762         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1763                         clp->cl_ipaddr);
1764
1765         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1766         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1767         p = xdr_encode_hyper(p, clp->cl_clientid);
1768         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1769         *p++ = cpu_to_be32(args->flags);                        /*flags */
1770
1771         /* Fore Channel */
1772         *p++ = cpu_to_be32(0);                          /* header padding size */
1773         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1774         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1775         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1776         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1777         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1778         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1779
1780         /* Back Channel */
1781         *p++ = cpu_to_be32(0);                          /* header padding size */
1782         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1783         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1784         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1785         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1786         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1787         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1788
1789         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1790         *p++ = cpu_to_be32(1);
1791         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1792
1793         /* authsys_parms rfc1831 */
1794         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1795         p = xdr_encode_opaque(p, machine_name, len);
1796         *p++ = cpu_to_be32(0);                          /* UID */
1797         *p++ = cpu_to_be32(0);                          /* GID */
1798         *p = cpu_to_be32(0);                            /* No more gids */
1799 }
1800
1801 static void encode_destroy_session(struct xdr_stream *xdr,
1802                                    struct nfs4_session *session,
1803                                    struct compound_hdr *hdr)
1804 {
1805         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1806         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1807 }
1808
1809 static void encode_destroy_clientid(struct xdr_stream *xdr,
1810                                    uint64_t clientid,
1811                                    struct compound_hdr *hdr)
1812 {
1813         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1814         encode_uint64(xdr, clientid);
1815 }
1816
1817 static void encode_reclaim_complete(struct xdr_stream *xdr,
1818                                     struct nfs41_reclaim_complete_args *args,
1819                                     struct compound_hdr *hdr)
1820 {
1821         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1822         encode_uint32(xdr, args->one_fs);
1823 }
1824 #endif /* CONFIG_NFS_V4_1 */
1825
1826 static void encode_sequence(struct xdr_stream *xdr,
1827                             const struct nfs4_sequence_args *args,
1828                             struct compound_hdr *hdr)
1829 {
1830 #if defined(CONFIG_NFS_V4_1)
1831         struct nfs4_session *session;
1832         struct nfs4_slot_table *tp;
1833         struct nfs4_slot *slot = args->sa_slot;
1834         __be32 *p;
1835
1836         if (slot == NULL)
1837                 return;
1838
1839         tp = slot->table;
1840         session = tp->session;
1841
1842         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1843
1844         /*
1845          * Sessionid + seqid + slotid + max slotid + cache_this
1846          */
1847         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1848                 "max_slotid=%d cache_this=%d\n",
1849                 __func__,
1850                 ((u32 *)session->sess_id.data)[0],
1851                 ((u32 *)session->sess_id.data)[1],
1852                 ((u32 *)session->sess_id.data)[2],
1853                 ((u32 *)session->sess_id.data)[3],
1854                 slot->seq_nr, slot->slot_nr,
1855                 tp->highest_used_slotid, args->sa_cache_this);
1856         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1857         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1858         *p++ = cpu_to_be32(slot->seq_nr);
1859         *p++ = cpu_to_be32(slot->slot_nr);
1860         *p++ = cpu_to_be32(tp->highest_used_slotid);
1861         *p = cpu_to_be32(args->sa_cache_this);
1862 #endif /* CONFIG_NFS_V4_1 */
1863 }
1864
1865 #ifdef CONFIG_NFS_V4_1
1866 static void
1867 encode_getdevicelist(struct xdr_stream *xdr,
1868                      const struct nfs4_getdevicelist_args *args,
1869                      struct compound_hdr *hdr)
1870 {
1871         __be32 *p;
1872         nfs4_verifier dummy = {
1873                 .data = "dummmmmy",
1874         };
1875
1876         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1877         p = reserve_space(xdr, 16);
1878         *p++ = cpu_to_be32(args->layoutclass);
1879         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1880         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1881         encode_nfs4_verifier(xdr, &dummy);
1882 }
1883
1884 static void
1885 encode_getdeviceinfo(struct xdr_stream *xdr,
1886                      const struct nfs4_getdeviceinfo_args *args,
1887                      struct compound_hdr *hdr)
1888 {
1889         __be32 *p;
1890
1891         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1892         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1893         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1894                                     NFS4_DEVICEID4_SIZE);
1895         *p++ = cpu_to_be32(args->pdev->layout_type);
1896         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1897         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1898 }
1899
1900 static void
1901 encode_layoutget(struct xdr_stream *xdr,
1902                       const struct nfs4_layoutget_args *args,
1903                       struct compound_hdr *hdr)
1904 {
1905         __be32 *p;
1906
1907         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1908         p = reserve_space(xdr, 36);
1909         *p++ = cpu_to_be32(0);     /* Signal layout available */
1910         *p++ = cpu_to_be32(args->type);
1911         *p++ = cpu_to_be32(args->range.iomode);
1912         p = xdr_encode_hyper(p, args->range.offset);
1913         p = xdr_encode_hyper(p, args->range.length);
1914         p = xdr_encode_hyper(p, args->minlength);
1915         encode_nfs4_stateid(xdr, &args->stateid);
1916         encode_uint32(xdr, args->maxcount);
1917
1918         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1919                 __func__,
1920                 args->type,
1921                 args->range.iomode,
1922                 (unsigned long)args->range.offset,
1923                 (unsigned long)args->range.length,
1924                 args->maxcount);
1925 }
1926
1927 static int
1928 encode_layoutcommit(struct xdr_stream *xdr,
1929                     struct inode *inode,
1930                     const struct nfs4_layoutcommit_args *args,
1931                     struct compound_hdr *hdr)
1932 {
1933         __be32 *p;
1934
1935         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1936                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1937
1938         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1939         p = reserve_space(xdr, 20);
1940         /* Only whole file layouts */
1941         p = xdr_encode_hyper(p, 0); /* offset */
1942         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1943         *p = cpu_to_be32(0); /* reclaim */
1944         encode_nfs4_stateid(xdr, &args->stateid);
1945         p = reserve_space(xdr, 20);
1946         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1947         p = xdr_encode_hyper(p, args->lastbytewritten);
1948         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1949         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1950
1951         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1952                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1953                         NFS_I(inode)->layout, xdr, args);
1954         else
1955                 encode_uint32(xdr, 0); /* no layout-type payload */
1956
1957         return 0;
1958 }
1959
1960 static void
1961 encode_layoutreturn(struct xdr_stream *xdr,
1962                     const struct nfs4_layoutreturn_args *args,
1963                     struct compound_hdr *hdr)
1964 {
1965         __be32 *p;
1966
1967         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1968         p = reserve_space(xdr, 16);
1969         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1970         *p++ = cpu_to_be32(args->layout_type);
1971         *p++ = cpu_to_be32(IOMODE_ANY);
1972         *p = cpu_to_be32(RETURN_FILE);
1973         p = reserve_space(xdr, 16);
1974         p = xdr_encode_hyper(p, 0);
1975         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1976         spin_lock(&args->inode->i_lock);
1977         encode_nfs4_stateid(xdr, &args->stateid);
1978         spin_unlock(&args->inode->i_lock);
1979         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1980                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1981                         NFS_I(args->inode)->layout, xdr, args);
1982         } else
1983                 encode_uint32(xdr, 0);
1984 }
1985
1986 static int
1987 encode_secinfo_no_name(struct xdr_stream *xdr,
1988                        const struct nfs41_secinfo_no_name_args *args,
1989                        struct compound_hdr *hdr)
1990 {
1991         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1992         encode_uint32(xdr, args->style);
1993         return 0;
1994 }
1995
1996 static void encode_test_stateid(struct xdr_stream *xdr,
1997                                 struct nfs41_test_stateid_args *args,
1998                                 struct compound_hdr *hdr)
1999 {
2000         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2001         encode_uint32(xdr, 1);
2002         encode_nfs4_stateid(xdr, args->stateid);
2003 }
2004
2005 static void encode_free_stateid(struct xdr_stream *xdr,
2006                                 struct nfs41_free_stateid_args *args,
2007                                 struct compound_hdr *hdr)
2008 {
2009         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2010         encode_nfs4_stateid(xdr, &args->stateid);
2011 }
2012 #endif /* CONFIG_NFS_V4_1 */
2013
2014 /*
2015  * END OF "GENERIC" ENCODE ROUTINES.
2016  */
2017
2018 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2019 {
2020 #if defined(CONFIG_NFS_V4_1)
2021
2022         if (args->sa_slot)
2023                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2024 #endif /* CONFIG_NFS_V4_1 */
2025         return 0;
2026 }
2027
2028 /*
2029  * Encode an ACCESS request
2030  */
2031 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2032                                 const struct nfs4_accessargs *args)
2033 {
2034         struct compound_hdr hdr = {
2035                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2036         };
2037
2038         encode_compound_hdr(xdr, req, &hdr);
2039         encode_sequence(xdr, &args->seq_args, &hdr);
2040         encode_putfh(xdr, args->fh, &hdr);
2041         encode_access(xdr, args->access, &hdr);
2042         encode_getfattr(xdr, args->bitmask, &hdr);
2043         encode_nops(&hdr);
2044 }
2045
2046 /*
2047  * Encode LOOKUP request
2048  */
2049 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2050                                 const struct nfs4_lookup_arg *args)
2051 {
2052         struct compound_hdr hdr = {
2053                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2054         };
2055
2056         encode_compound_hdr(xdr, req, &hdr);
2057         encode_sequence(xdr, &args->seq_args, &hdr);
2058         encode_putfh(xdr, args->dir_fh, &hdr);
2059         encode_lookup(xdr, args->name, &hdr);
2060         encode_getfh(xdr, &hdr);
2061         encode_getfattr(xdr, args->bitmask, &hdr);
2062         encode_nops(&hdr);
2063 }
2064
2065 /*
2066  * Encode LOOKUP_ROOT request
2067  */
2068 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2069                                      struct xdr_stream *xdr,
2070                                      const struct nfs4_lookup_root_arg *args)
2071 {
2072         struct compound_hdr hdr = {
2073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2074         };
2075
2076         encode_compound_hdr(xdr, req, &hdr);
2077         encode_sequence(xdr, &args->seq_args, &hdr);
2078         encode_putrootfh(xdr, &hdr);
2079         encode_getfh(xdr, &hdr);
2080         encode_getfattr(xdr, args->bitmask, &hdr);
2081         encode_nops(&hdr);
2082 }
2083
2084 /*
2085  * Encode REMOVE request
2086  */
2087 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2088                                 const struct nfs_removeargs *args)
2089 {
2090         struct compound_hdr hdr = {
2091                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2092         };
2093
2094         encode_compound_hdr(xdr, req, &hdr);
2095         encode_sequence(xdr, &args->seq_args, &hdr);
2096         encode_putfh(xdr, args->fh, &hdr);
2097         encode_remove(xdr, &args->name, &hdr);
2098         encode_nops(&hdr);
2099 }
2100
2101 /*
2102  * Encode RENAME request
2103  */
2104 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2105                                 const struct nfs_renameargs *args)
2106 {
2107         struct compound_hdr hdr = {
2108                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2109         };
2110
2111         encode_compound_hdr(xdr, req, &hdr);
2112         encode_sequence(xdr, &args->seq_args, &hdr);
2113         encode_putfh(xdr, args->old_dir, &hdr);
2114         encode_savefh(xdr, &hdr);
2115         encode_putfh(xdr, args->new_dir, &hdr);
2116         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2117         encode_nops(&hdr);
2118 }
2119
2120 /*
2121  * Encode LINK request
2122  */
2123 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2124                              const struct nfs4_link_arg *args)
2125 {
2126         struct compound_hdr hdr = {
2127                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2128         };
2129
2130         encode_compound_hdr(xdr, req, &hdr);
2131         encode_sequence(xdr, &args->seq_args, &hdr);
2132         encode_putfh(xdr, args->fh, &hdr);
2133         encode_savefh(xdr, &hdr);
2134         encode_putfh(xdr, args->dir_fh, &hdr);
2135         encode_link(xdr, args->name, &hdr);
2136         encode_restorefh(xdr, &hdr);
2137         encode_getfattr(xdr, args->bitmask, &hdr);
2138         encode_nops(&hdr);
2139 }
2140
2141 /*
2142  * Encode CREATE request
2143  */
2144 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2145                                 const struct nfs4_create_arg *args)
2146 {
2147         struct compound_hdr hdr = {
2148                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2149         };
2150
2151         encode_compound_hdr(xdr, req, &hdr);
2152         encode_sequence(xdr, &args->seq_args, &hdr);
2153         encode_putfh(xdr, args->dir_fh, &hdr);
2154         encode_create(xdr, args, &hdr);
2155         encode_getfh(xdr, &hdr);
2156         encode_getfattr(xdr, args->bitmask, &hdr);
2157         encode_nops(&hdr);
2158 }
2159
2160 /*
2161  * Encode SYMLINK request
2162  */
2163 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2164                                  const struct nfs4_create_arg *args)
2165 {
2166         nfs4_xdr_enc_create(req, xdr, args);
2167 }
2168
2169 /*
2170  * Encode GETATTR request
2171  */
2172 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2173                                  const struct nfs4_getattr_arg *args)
2174 {
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         encode_compound_hdr(xdr, req, &hdr);
2180         encode_sequence(xdr, &args->seq_args, &hdr);
2181         encode_putfh(xdr, args->fh, &hdr);
2182         encode_getfattr(xdr, args->bitmask, &hdr);
2183         encode_nops(&hdr);
2184 }
2185
2186 /*
2187  * Encode a CLOSE request
2188  */
2189 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2190                                struct nfs_closeargs *args)
2191 {
2192         struct compound_hdr hdr = {
2193                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2194         };
2195
2196         encode_compound_hdr(xdr, req, &hdr);
2197         encode_sequence(xdr, &args->seq_args, &hdr);
2198         encode_putfh(xdr, args->fh, &hdr);
2199         encode_close(xdr, args, &hdr);
2200         encode_getfattr(xdr, args->bitmask, &hdr);
2201         encode_nops(&hdr);
2202 }
2203
2204 /*
2205  * Encode an OPEN request
2206  */
2207 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                               struct nfs_openargs *args)
2209 {
2210         struct compound_hdr hdr = {
2211                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212         };
2213
2214         encode_compound_hdr(xdr, req, &hdr);
2215         encode_sequence(xdr, &args->seq_args, &hdr);
2216         encode_putfh(xdr, args->fh, &hdr);
2217         encode_open(xdr, args, &hdr);
2218         encode_getfh(xdr, &hdr);
2219         if (args->access)
2220                 encode_access(xdr, args->access, &hdr);
2221         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2222         encode_nops(&hdr);
2223 }
2224
2225 /*
2226  * Encode an OPEN_CONFIRM request
2227  */
2228 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2229                                       struct xdr_stream *xdr,
2230                                       struct nfs_open_confirmargs *args)
2231 {
2232         struct compound_hdr hdr = {
2233                 .nops   = 0,
2234         };
2235
2236         encode_compound_hdr(xdr, req, &hdr);
2237         encode_putfh(xdr, args->fh, &hdr);
2238         encode_open_confirm(xdr, args, &hdr);
2239         encode_nops(&hdr);
2240 }
2241
2242 /*
2243  * Encode an OPEN request with no attributes.
2244  */
2245 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2246                                      struct xdr_stream *xdr,
2247                                      struct nfs_openargs *args)
2248 {
2249         struct compound_hdr hdr = {
2250                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251         };
2252
2253         encode_compound_hdr(xdr, req, &hdr);
2254         encode_sequence(xdr, &args->seq_args, &hdr);
2255         encode_putfh(xdr, args->fh, &hdr);
2256         encode_open(xdr, args, &hdr);
2257         if (args->access)
2258                 encode_access(xdr, args->access, &hdr);
2259         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2260         encode_nops(&hdr);
2261 }
2262
2263 /*
2264  * Encode an OPEN_DOWNGRADE request
2265  */
2266 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2267                                         struct xdr_stream *xdr,
2268                                         struct nfs_closeargs *args)
2269 {
2270         struct compound_hdr hdr = {
2271                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272         };
2273
2274         encode_compound_hdr(xdr, req, &hdr);
2275         encode_sequence(xdr, &args->seq_args, &hdr);
2276         encode_putfh(xdr, args->fh, &hdr);
2277         encode_open_downgrade(xdr, args, &hdr);
2278         encode_getfattr(xdr, args->bitmask, &hdr);
2279         encode_nops(&hdr);
2280 }
2281
2282 /*
2283  * Encode a LOCK request
2284  */
2285 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2286                               struct nfs_lock_args *args)
2287 {
2288         struct compound_hdr hdr = {
2289                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2290         };
2291
2292         encode_compound_hdr(xdr, req, &hdr);
2293         encode_sequence(xdr, &args->seq_args, &hdr);
2294         encode_putfh(xdr, args->fh, &hdr);
2295         encode_lock(xdr, args, &hdr);
2296         encode_nops(&hdr);
2297 }
2298
2299 /*
2300  * Encode a LOCKT request
2301  */
2302 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2303                                struct nfs_lockt_args *args)
2304 {
2305         struct compound_hdr hdr = {
2306                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2307         };
2308
2309         encode_compound_hdr(xdr, req, &hdr);
2310         encode_sequence(xdr, &args->seq_args, &hdr);
2311         encode_putfh(xdr, args->fh, &hdr);
2312         encode_lockt(xdr, args, &hdr);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode a LOCKU request
2318  */
2319 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2320                                struct nfs_locku_args *args)
2321 {
2322         struct compound_hdr hdr = {
2323                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324         };
2325
2326         encode_compound_hdr(xdr, req, &hdr);
2327         encode_sequence(xdr, &args->seq_args, &hdr);
2328         encode_putfh(xdr, args->fh, &hdr);
2329         encode_locku(xdr, args, &hdr);
2330         encode_nops(&hdr);
2331 }
2332
2333 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2334                                            struct xdr_stream *xdr,
2335                                         struct nfs_release_lockowner_args *args)
2336 {
2337         struct compound_hdr hdr = {
2338                 .minorversion = 0,
2339         };
2340
2341         encode_compound_hdr(xdr, req, &hdr);
2342         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2343         encode_nops(&hdr);
2344 }
2345
2346 /*
2347  * Encode a READLINK request
2348  */
2349 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2350                                   const struct nfs4_readlink *args)
2351 {
2352         struct compound_hdr hdr = {
2353                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354         };
2355
2356         encode_compound_hdr(xdr, req, &hdr);
2357         encode_sequence(xdr, &args->seq_args, &hdr);
2358         encode_putfh(xdr, args->fh, &hdr);
2359         encode_readlink(xdr, args, req, &hdr);
2360
2361         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2362                         args->pgbase, args->pglen);
2363         encode_nops(&hdr);
2364 }
2365
2366 /*
2367  * Encode a READDIR request
2368  */
2369 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2370                                  const struct nfs4_readdir_arg *args)
2371 {
2372         struct compound_hdr hdr = {
2373                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2374         };
2375
2376         encode_compound_hdr(xdr, req, &hdr);
2377         encode_sequence(xdr, &args->seq_args, &hdr);
2378         encode_putfh(xdr, args->fh, &hdr);
2379         encode_readdir(xdr, args, req, &hdr);
2380
2381         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2382                          args->pgbase, args->count);
2383         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2384                         __func__, hdr.replen << 2, args->pages,
2385                         args->pgbase, args->count);
2386         encode_nops(&hdr);
2387 }
2388
2389 /*
2390  * Encode a READ request
2391  */
2392 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2393                               struct nfs_readargs *args)
2394 {
2395         struct compound_hdr hdr = {
2396                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2397         };
2398
2399         encode_compound_hdr(xdr, req, &hdr);
2400         encode_sequence(xdr, &args->seq_args, &hdr);
2401         encode_putfh(xdr, args->fh, &hdr);
2402         encode_read(xdr, args, &hdr);
2403
2404         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2405                          args->pages, args->pgbase, args->count);
2406         req->rq_rcv_buf.flags |= XDRBUF_READ;
2407         encode_nops(&hdr);
2408 }
2409
2410 /*
2411  * Encode an SETATTR request
2412  */
2413 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2414                                  struct nfs_setattrargs *args)
2415 {
2416         struct compound_hdr hdr = {
2417                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418         };
2419
2420         encode_compound_hdr(xdr, req, &hdr);
2421         encode_sequence(xdr, &args->seq_args, &hdr);
2422         encode_putfh(xdr, args->fh, &hdr);
2423         encode_setattr(xdr, args, args->server, &hdr);
2424         encode_getfattr(xdr, args->bitmask, &hdr);
2425         encode_nops(&hdr);
2426 }
2427
2428 /*
2429  * Encode a GETACL request
2430  */
2431 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2432                                 struct nfs_getaclargs *args)
2433 {
2434         struct compound_hdr hdr = {
2435                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2436         };
2437         uint32_t replen;
2438
2439         encode_compound_hdr(xdr, req, &hdr);
2440         encode_sequence(xdr, &args->seq_args, &hdr);
2441         encode_putfh(xdr, args->fh, &hdr);
2442         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2443         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2444
2445         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2446                 args->acl_pages, args->acl_pgbase, args->acl_len);
2447
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * Encode a WRITE request
2453  */
2454 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                struct nfs_writeargs *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_write(xdr, args, &hdr);
2465         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2466         if (args->bitmask)
2467                 encode_getfattr(xdr, args->bitmask, &hdr);
2468         encode_nops(&hdr);
2469 }
2470
2471 /*
2472  *  a COMMIT request
2473  */
2474 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2475                                 struct nfs_commitargs *args)
2476 {
2477         struct compound_hdr hdr = {
2478                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2479         };
2480
2481         encode_compound_hdr(xdr, req, &hdr);
2482         encode_sequence(xdr, &args->seq_args, &hdr);
2483         encode_putfh(xdr, args->fh, &hdr);
2484         encode_commit(xdr, args, &hdr);
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * FSINFO request
2490  */
2491 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                 struct nfs4_fsinfo_arg *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_fsinfo(xdr, args->bitmask, &hdr);
2502         encode_nops(&hdr);
2503 }
2504
2505 /*
2506  * a PATHCONF request
2507  */
2508 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2509                                   const struct nfs4_pathconf_arg *args)
2510 {
2511         struct compound_hdr hdr = {
2512                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2513         };
2514
2515         encode_compound_hdr(xdr, req, &hdr);
2516         encode_sequence(xdr, &args->seq_args, &hdr);
2517         encode_putfh(xdr, args->fh, &hdr);
2518         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2519                            &hdr);
2520         encode_nops(&hdr);
2521 }
2522
2523 /*
2524  * a STATFS request
2525  */
2526 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2527                                 const struct nfs4_statfs_arg *args)
2528 {
2529         struct compound_hdr hdr = {
2530                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2531         };
2532
2533         encode_compound_hdr(xdr, req, &hdr);
2534         encode_sequence(xdr, &args->seq_args, &hdr);
2535         encode_putfh(xdr, args->fh, &hdr);
2536         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2537                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2538         encode_nops(&hdr);
2539 }
2540
2541 /*
2542  * GETATTR_BITMAP request
2543  */
2544 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2545                                      struct xdr_stream *xdr,
2546                                      struct nfs4_server_caps_arg *args)
2547 {
2548         struct compound_hdr hdr = {
2549                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2550         };
2551
2552         encode_compound_hdr(xdr, req, &hdr);
2553         encode_sequence(xdr, &args->seq_args, &hdr);
2554         encode_putfh(xdr, args->fhandle, &hdr);
2555         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2556                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2557                            FATTR4_WORD0_LINK_SUPPORT|
2558                            FATTR4_WORD0_SYMLINK_SUPPORT|
2559                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2560         encode_nops(&hdr);
2561 }
2562
2563 /*
2564  * a RENEW request
2565  */
2566 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2567                                struct nfs_client *clp)
2568 {
2569         struct compound_hdr hdr = {
2570                 .nops   = 0,
2571         };
2572
2573         encode_compound_hdr(xdr, req, &hdr);
2574         encode_renew(xdr, clp->cl_clientid, &hdr);
2575         encode_nops(&hdr);
2576 }
2577
2578 /*
2579  * a SETCLIENTID request
2580  */
2581 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2582                                      struct xdr_stream *xdr,
2583                                      struct nfs4_setclientid *sc)
2584 {
2585         struct compound_hdr hdr = {
2586                 .nops   = 0,
2587         };
2588
2589         encode_compound_hdr(xdr, req, &hdr);
2590         encode_setclientid(xdr, sc, &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * a SETCLIENTID_CONFIRM request
2596  */
2597 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2598                                              struct xdr_stream *xdr,
2599                                              struct nfs4_setclientid_res *arg)
2600 {
2601         struct compound_hdr hdr = {
2602                 .nops   = 0,
2603         };
2604
2605         encode_compound_hdr(xdr, req, &hdr);
2606         encode_setclientid_confirm(xdr, arg, &hdr);
2607         encode_nops(&hdr);
2608 }
2609
2610 /*
2611  * DELEGRETURN request
2612  */
2613 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2614                                      struct xdr_stream *xdr,
2615                                      const struct nfs4_delegreturnargs *args)
2616 {
2617         struct compound_hdr hdr = {
2618                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2619         };
2620
2621         encode_compound_hdr(xdr, req, &hdr);
2622         encode_sequence(xdr, &args->seq_args, &hdr);
2623         encode_putfh(xdr, args->fhandle, &hdr);
2624         encode_getfattr(xdr, args->bitmask, &hdr);
2625         encode_delegreturn(xdr, args->stateid, &hdr);
2626         encode_nops(&hdr);
2627 }
2628
2629 /*
2630  * Encode FS_LOCATIONS request
2631  */
2632 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2633                                       struct xdr_stream *xdr,
2634                                       struct nfs4_fs_locations_arg *args)
2635 {
2636         struct compound_hdr hdr = {
2637                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2638         };
2639         uint32_t replen;
2640
2641         encode_compound_hdr(xdr, req, &hdr);
2642         encode_sequence(xdr, &args->seq_args, &hdr);
2643         encode_putfh(xdr, args->dir_fh, &hdr);
2644         encode_lookup(xdr, args->name, &hdr);
2645         replen = hdr.replen;    /* get the attribute into args->page */
2646         encode_fs_locations(xdr, args->bitmask, &hdr);
2647
2648         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2649                         0, PAGE_SIZE);
2650         encode_nops(&hdr);
2651 }
2652
2653 /*
2654  * Encode SECINFO request
2655  */
2656 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2657                                 struct xdr_stream *xdr,
2658                                 struct nfs4_secinfo_arg *args)
2659 {
2660         struct compound_hdr hdr = {
2661                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2662         };
2663
2664         encode_compound_hdr(xdr, req, &hdr);
2665         encode_sequence(xdr, &args->seq_args, &hdr);
2666         encode_putfh(xdr, args->dir_fh, &hdr);
2667         encode_secinfo(xdr, args->name, &hdr);
2668         encode_nops(&hdr);
2669 }
2670
2671 #if defined(CONFIG_NFS_V4_1)
2672 /*
2673  * BIND_CONN_TO_SESSION request
2674  */
2675 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2676                                 struct xdr_stream *xdr,
2677                                 struct nfs_client *clp)
2678 {
2679         struct compound_hdr hdr = {
2680                 .minorversion = clp->cl_mvops->minor_version,
2681         };
2682
2683         encode_compound_hdr(xdr, req, &hdr);
2684         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2685         encode_nops(&hdr);
2686 }
2687
2688 /*
2689  * EXCHANGE_ID request
2690  */
2691 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2692                                      struct xdr_stream *xdr,
2693                                      struct nfs41_exchange_id_args *args)
2694 {
2695         struct compound_hdr hdr = {
2696                 .minorversion = args->client->cl_mvops->minor_version,
2697         };
2698
2699         encode_compound_hdr(xdr, req, &hdr);
2700         encode_exchange_id(xdr, args, &hdr);
2701         encode_nops(&hdr);
2702 }
2703
2704 /*
2705  * a CREATE_SESSION request
2706  */
2707 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2708                                         struct xdr_stream *xdr,
2709                                         struct nfs41_create_session_args *args)
2710 {
2711         struct compound_hdr hdr = {
2712                 .minorversion = args->client->cl_mvops->minor_version,
2713         };
2714
2715         encode_compound_hdr(xdr, req, &hdr);
2716         encode_create_session(xdr, args, &hdr);
2717         encode_nops(&hdr);
2718 }
2719
2720 /*
2721  * a DESTROY_SESSION request
2722  */
2723 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2724                                          struct xdr_stream *xdr,
2725                                          struct nfs4_session *session)
2726 {
2727         struct compound_hdr hdr = {
2728                 .minorversion = session->clp->cl_mvops->minor_version,
2729         };
2730
2731         encode_compound_hdr(xdr, req, &hdr);
2732         encode_destroy_session(xdr, session, &hdr);
2733         encode_nops(&hdr);
2734 }
2735
2736 /*
2737  * a DESTROY_CLIENTID request
2738  */
2739 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2740                                          struct xdr_stream *xdr,
2741                                          struct nfs_client *clp)
2742 {
2743         struct compound_hdr hdr = {
2744                 .minorversion = clp->cl_mvops->minor_version,
2745         };
2746
2747         encode_compound_hdr(xdr, req, &hdr);
2748         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2749         encode_nops(&hdr);
2750 }
2751
2752 /*
2753  * a SEQUENCE request
2754  */
2755 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2756                                   struct nfs4_sequence_args *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = nfs4_xdr_minorversion(args),
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_sequence(xdr, args, &hdr);
2764         encode_nops(&hdr);
2765 }
2766
2767 /*
2768  * a GET_LEASE_TIME request
2769  */
2770 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2771                                         struct xdr_stream *xdr,
2772                                         struct nfs4_get_lease_time_args *args)
2773 {
2774         struct compound_hdr hdr = {
2775                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2776         };
2777         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2778
2779         encode_compound_hdr(xdr, req, &hdr);
2780         encode_sequence(xdr, &args->la_seq_args, &hdr);
2781         encode_putrootfh(xdr, &hdr);
2782         encode_fsinfo(xdr, lease_bitmap, &hdr);
2783         encode_nops(&hdr);
2784 }
2785
2786 /*
2787  * a RECLAIM_COMPLETE request
2788  */
2789 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2790                                           struct xdr_stream *xdr,
2791                                 struct nfs41_reclaim_complete_args *args)
2792 {
2793         struct compound_hdr hdr = {
2794                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2795         };
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_sequence(xdr, &args->seq_args, &hdr);
2799         encode_reclaim_complete(xdr, args, &hdr);
2800         encode_nops(&hdr);
2801 }
2802
2803 /*
2804  * Encode GETDEVICELIST request
2805  */
2806 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2807                                        struct xdr_stream *xdr,
2808                                        struct nfs4_getdevicelist_args *args)
2809 {
2810         struct compound_hdr hdr = {
2811                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2812         };
2813
2814         encode_compound_hdr(xdr, req, &hdr);
2815         encode_sequence(xdr, &args->seq_args, &hdr);
2816         encode_putfh(xdr, args->fh, &hdr);
2817         encode_getdevicelist(xdr, args, &hdr);
2818         encode_nops(&hdr);
2819 }
2820
2821 /*
2822  * Encode GETDEVICEINFO request
2823  */
2824 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2825                                        struct xdr_stream *xdr,
2826                                        struct nfs4_getdeviceinfo_args *args)
2827 {
2828         struct compound_hdr hdr = {
2829                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2830         };
2831
2832         encode_compound_hdr(xdr, req, &hdr);
2833         encode_sequence(xdr, &args->seq_args, &hdr);
2834         encode_getdeviceinfo(xdr, args, &hdr);
2835
2836         /* set up reply kvec. Subtract notification bitmap max size (2)
2837          * so that notification bitmap is put in xdr_buf tail */
2838         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2839                          args->pdev->pages, args->pdev->pgbase,
2840                          args->pdev->pglen);
2841
2842         encode_nops(&hdr);
2843 }
2844
2845 /*
2846  *  Encode LAYOUTGET request
2847  */
2848 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2849                                    struct xdr_stream *xdr,
2850                                    struct nfs4_layoutget_args *args)
2851 {
2852         struct compound_hdr hdr = {
2853                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2854         };
2855
2856         encode_compound_hdr(xdr, req, &hdr);
2857         encode_sequence(xdr, &args->seq_args, &hdr);
2858         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2859         encode_layoutget(xdr, args, &hdr);
2860
2861         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2862             args->layout.pages, 0, args->layout.pglen);
2863
2864         encode_nops(&hdr);
2865 }
2866
2867 /*
2868  *  Encode LAYOUTCOMMIT request
2869  */
2870 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2871                                       struct xdr_stream *xdr,
2872                                       struct nfs4_layoutcommit_args *args)
2873 {
2874         struct nfs4_layoutcommit_data *data =
2875                 container_of(args, struct nfs4_layoutcommit_data, args);
2876         struct compound_hdr hdr = {
2877                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2878         };
2879
2880         encode_compound_hdr(xdr, req, &hdr);
2881         encode_sequence(xdr, &args->seq_args, &hdr);
2882         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2883         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2884         encode_getfattr(xdr, args->bitmask, &hdr);
2885         encode_nops(&hdr);
2886 }
2887
2888 /*
2889  * Encode LAYOUTRETURN request
2890  */
2891 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2892                                       struct xdr_stream *xdr,
2893                                       struct nfs4_layoutreturn_args *args)
2894 {
2895         struct compound_hdr hdr = {
2896                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2897         };
2898
2899         encode_compound_hdr(xdr, req, &hdr);
2900         encode_sequence(xdr, &args->seq_args, &hdr);
2901         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2902         encode_layoutreturn(xdr, args, &hdr);
2903         encode_nops(&hdr);
2904 }
2905
2906 /*
2907  * Encode SECINFO_NO_NAME request
2908  */
2909 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2910                                         struct xdr_stream *xdr,
2911                                         struct nfs41_secinfo_no_name_args *args)
2912 {
2913         struct compound_hdr hdr = {
2914                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915         };
2916
2917         encode_compound_hdr(xdr, req, &hdr);
2918         encode_sequence(xdr, &args->seq_args, &hdr);
2919         encode_putrootfh(xdr, &hdr);
2920         encode_secinfo_no_name(xdr, args, &hdr);
2921         encode_nops(&hdr);
2922         return 0;
2923 }
2924
2925 /*
2926  *  Encode TEST_STATEID request
2927  */
2928 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2929                                       struct xdr_stream *xdr,
2930                                       struct nfs41_test_stateid_args *args)
2931 {
2932         struct compound_hdr hdr = {
2933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934         };
2935
2936         encode_compound_hdr(xdr, req, &hdr);
2937         encode_sequence(xdr, &args->seq_args, &hdr);
2938         encode_test_stateid(xdr, args, &hdr);
2939         encode_nops(&hdr);
2940 }
2941
2942 /*
2943  *  Encode FREE_STATEID request
2944  */
2945 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2946                                      struct xdr_stream *xdr,
2947                                      struct nfs41_free_stateid_args *args)
2948 {
2949         struct compound_hdr hdr = {
2950                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2951         };
2952
2953         encode_compound_hdr(xdr, req, &hdr);
2954         encode_sequence(xdr, &args->seq_args, &hdr);
2955         encode_free_stateid(xdr, args, &hdr);
2956         encode_nops(&hdr);
2957 }
2958 #endif /* CONFIG_NFS_V4_1 */
2959
2960 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2961 {
2962         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2963                 "Remaining buffer length is %tu words.\n",
2964                 func, xdr->end - xdr->p);
2965 }
2966
2967 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2968 {
2969         __be32 *p;
2970
2971         p = xdr_inline_decode(xdr, 4);
2972         if (unlikely(!p))
2973                 goto out_overflow;
2974         *len = be32_to_cpup(p);
2975         p = xdr_inline_decode(xdr, *len);
2976         if (unlikely(!p))
2977                 goto out_overflow;
2978         *string = (char *)p;
2979         return 0;
2980 out_overflow:
2981         print_overflow_msg(__func__, xdr);
2982         return -EIO;
2983 }
2984
2985 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2986 {
2987         __be32 *p;
2988
2989         p = xdr_inline_decode(xdr, 8);
2990         if (unlikely(!p))
2991                 goto out_overflow;
2992         hdr->status = be32_to_cpup(p++);
2993         hdr->taglen = be32_to_cpup(p);
2994
2995         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2996         if (unlikely(!p))
2997                 goto out_overflow;
2998         hdr->tag = (char *)p;
2999         p += XDR_QUADLEN(hdr->taglen);
3000         hdr->nops = be32_to_cpup(p);
3001         if (unlikely(hdr->nops < 1))
3002                 return nfs4_stat_to_errno(hdr->status);
3003         return 0;
3004 out_overflow:
3005         print_overflow_msg(__func__, xdr);
3006         return -EIO;
3007 }
3008
3009 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3010 {
3011         __be32 *p;
3012         uint32_t opnum;
3013         int32_t nfserr;
3014
3015         p = xdr_inline_decode(xdr, 8);
3016         if (unlikely(!p))
3017                 goto out_overflow;
3018         opnum = be32_to_cpup(p++);
3019         if (opnum != expected) {
3020                 dprintk("nfs: Server returned operation"
3021                         " %d but we issued a request for %d\n",
3022                                 opnum, expected);
3023                 return -EIO;
3024         }
3025         nfserr = be32_to_cpup(p);
3026         if (nfserr != NFS_OK)
3027                 return nfs4_stat_to_errno(nfserr);
3028         return 0;
3029 out_overflow:
3030         print_overflow_msg(__func__, xdr);
3031         return -EIO;
3032 }
3033
3034 /* Dummy routine */
3035 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3036 {
3037         __be32 *p;
3038         unsigned int strlen;
3039         char *str;
3040
3041         p = xdr_inline_decode(xdr, 12);
3042         if (likely(p))
3043                 return decode_opaque_inline(xdr, &strlen, &str);
3044         print_overflow_msg(__func__, xdr);
3045         return -EIO;
3046 }
3047
3048 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3049 {
3050         uint32_t bmlen;
3051         __be32 *p;
3052
3053         p = xdr_inline_decode(xdr, 4);
3054         if (unlikely(!p))
3055                 goto out_overflow;
3056         bmlen = be32_to_cpup(p);
3057
3058         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3059         p = xdr_inline_decode(xdr, (bmlen << 2));
3060         if (unlikely(!p))
3061                 goto out_overflow;
3062         if (bmlen > 0) {
3063                 bitmap[0] = be32_to_cpup(p++);
3064                 if (bmlen > 1) {
3065                         bitmap[1] = be32_to_cpup(p++);
3066                         if (bmlen > 2)
3067                                 bitmap[2] = be32_to_cpup(p);
3068                 }
3069         }
3070         return 0;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3077 {
3078         __be32 *p;
3079
3080         p = xdr_inline_decode(xdr, 4);
3081         if (unlikely(!p))
3082                 goto out_overflow;
3083         *attrlen = be32_to_cpup(p);
3084         *savep = xdr_stream_pos(xdr);
3085         return 0;
3086 out_overflow:
3087         print_overflow_msg(__func__, xdr);
3088         return -EIO;
3089 }
3090
3091 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3092 {
3093         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3094                 int ret;
3095                 ret = decode_attr_bitmap(xdr, bitmask);
3096                 if (unlikely(ret < 0))
3097                         return ret;
3098                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3099         } else
3100                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3101         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3102                 bitmask[0], bitmask[1], bitmask[2]);
3103         return 0;
3104 }
3105
3106 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3107 {
3108         __be32 *p;
3109         int ret = 0;
3110
3111         *type = 0;
3112         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3113                 return -EIO;
3114         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3115                 p = xdr_inline_decode(xdr, 4);
3116                 if (unlikely(!p))
3117                         goto out_overflow;
3118                 *type = be32_to_cpup(p);
3119                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3120                         dprintk("%s: bad type %d\n", __func__, *type);
3121                         return -EIO;
3122                 }
3123                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3124                 ret = NFS_ATTR_FATTR_TYPE;
3125         }
3126         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3127         return ret;
3128 out_overflow:
3129         print_overflow_msg(__func__, xdr);
3130         return -EIO;
3131 }
3132
3133 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3134                                       uint32_t *bitmap, uint32_t *type)
3135 {
3136         __be32 *p;
3137
3138         *type = 0;
3139         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3140                 return -EIO;
3141         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3142                 p = xdr_inline_decode(xdr, 4);
3143                 if (unlikely(!p))
3144                         goto out_overflow;
3145                 *type = be32_to_cpup(p);
3146                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3147         }
3148         dprintk("%s: expire type=0x%x\n", __func__, *type);
3149         return 0;
3150 out_overflow:
3151         print_overflow_msg(__func__, xdr);
3152         return -EIO;
3153 }
3154
3155 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3156 {
3157         __be32 *p;
3158         int ret = 0;
3159
3160         *change = 0;
3161         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3162                 return -EIO;
3163         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3164                 p = xdr_inline_decode(xdr, 8);
3165                 if (unlikely(!p))
3166                         goto out_overflow;
3167                 xdr_decode_hyper(p, change);
3168                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3169                 ret = NFS_ATTR_FATTR_CHANGE;
3170         }
3171         dprintk("%s: change attribute=%Lu\n", __func__,
3172                         (unsigned long long)*change);
3173         return ret;
3174 out_overflow:
3175         print_overflow_msg(__func__, xdr);
3176         return -EIO;
3177 }
3178
3179 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3180 {
3181         __be32 *p;
3182         int ret = 0;
3183
3184         *size = 0;
3185         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3186                 return -EIO;
3187         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3188                 p = xdr_inline_decode(xdr, 8);
3189                 if (unlikely(!p))
3190                         goto out_overflow;
3191                 xdr_decode_hyper(p, size);
3192                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3193                 ret = NFS_ATTR_FATTR_SIZE;
3194         }
3195         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3196         return ret;
3197 out_overflow:
3198         print_overflow_msg(__func__, xdr);
3199         return -EIO;
3200 }
3201
3202 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3203 {
3204         __be32 *p;
3205
3206         *res = 0;
3207         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3208                 return -EIO;
3209         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3210                 p = xdr_inline_decode(xdr, 4);
3211                 if (unlikely(!p))
3212                         goto out_overflow;
3213                 *res = be32_to_cpup(p);
3214                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3215         }
3216         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3217         return 0;
3218 out_overflow:
3219         print_overflow_msg(__func__, xdr);
3220         return -EIO;
3221 }
3222
3223 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3224 {
3225         __be32 *p;
3226
3227         *res = 0;
3228         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3229                 return -EIO;
3230         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3231                 p = xdr_inline_decode(xdr, 4);
3232                 if (unlikely(!p))
3233                         goto out_overflow;
3234                 *res = be32_to_cpup(p);
3235                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3236         }
3237         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3238         return 0;
3239 out_overflow:
3240         print_overflow_msg(__func__, xdr);
3241         return -EIO;
3242 }
3243
3244 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3245 {
3246         __be32 *p;
3247         int ret = 0;
3248
3249         fsid->major = 0;
3250         fsid->minor = 0;
3251         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3252                 return -EIO;
3253         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3254                 p = xdr_inline_decode(xdr, 16);
3255                 if (unlikely(!p))
3256                         goto out_overflow;
3257                 p = xdr_decode_hyper(p, &fsid->major);
3258                 xdr_decode_hyper(p, &fsid->minor);
3259                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3260                 ret = NFS_ATTR_FATTR_FSID;
3261         }
3262         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3263                         (unsigned long long)fsid->major,
3264                         (unsigned long long)fsid->minor);
3265         return ret;
3266 out_overflow:
3267         print_overflow_msg(__func__, xdr);
3268         return -EIO;
3269 }
3270
3271 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3272 {
3273         __be32 *p;
3274
3275         *res = 60;
3276         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3277                 return -EIO;
3278         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3279                 p = xdr_inline_decode(xdr, 4);
3280                 if (unlikely(!p))
3281                         goto out_overflow;
3282                 *res = be32_to_cpup(p);
3283                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3284         }
3285         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3286         return 0;
3287 out_overflow:
3288         print_overflow_msg(__func__, xdr);
3289         return -EIO;
3290 }
3291
3292 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3293 {
3294         __be32 *p;
3295
3296         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3297                 return -EIO;
3298         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3299                 p = xdr_inline_decode(xdr, 4);
3300                 if (unlikely(!p))
3301                         goto out_overflow;
3302                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3303                 *res = -be32_to_cpup(p);
3304         }
3305         return 0;
3306 out_overflow:
3307         print_overflow_msg(__func__, xdr);
3308         return -EIO;
3309 }
3310
3311 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3312 {
3313         __be32 *p;
3314         int len;
3315
3316         if (fh != NULL)
3317                 memset(fh, 0, sizeof(*fh));
3318
3319         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3320                 return -EIO;
3321         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3322                 p = xdr_inline_decode(xdr, 4);
3323                 if (unlikely(!p))
3324                         goto out_overflow;
3325                 len = be32_to_cpup(p);
3326                 if (len > NFS4_FHSIZE)
3327                         return -EIO;
3328                 p = xdr_inline_decode(xdr, len);
3329                 if (unlikely(!p))
3330                         goto out_overflow;
3331                 if (fh != NULL) {
3332                         memcpy(fh->data, p, len);
3333                         fh->size = len;
3334                 }
3335                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3336         }
3337         return 0;
3338 out_overflow:
3339         print_overflow_msg(__func__, xdr);
3340         return -EIO;
3341 }
3342
3343 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3344 {
3345         __be32 *p;
3346
3347         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3348         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3349                 return -EIO;
3350         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3351                 p = xdr_inline_decode(xdr, 4);
3352                 if (unlikely(!p))
3353                         goto out_overflow;
3354                 *res = be32_to_cpup(p);
3355                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3356         }
3357         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3358         return 0;
3359 out_overflow:
3360         print_overflow_msg(__func__, xdr);
3361         return -EIO;
3362 }
3363
3364 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3365 {
3366         __be32 *p;
3367         int ret = 0;
3368
3369         *fileid = 0;
3370         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3371                 return -EIO;
3372         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3373                 p = xdr_inline_decode(xdr, 8);
3374                 if (unlikely(!p))
3375                         goto out_overflow;
3376                 xdr_decode_hyper(p, fileid);
3377                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3378                 ret = NFS_ATTR_FATTR_FILEID;
3379         }
3380         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3381         return ret;
3382 out_overflow:
3383         print_overflow_msg(__func__, xdr);
3384         return -EIO;
3385 }
3386
3387 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3388 {
3389         __be32 *p;
3390         int ret = 0;
3391
3392         *fileid = 0;
3393         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3394                 return -EIO;
3395         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3396                 p = xdr_inline_decode(xdr, 8);
3397                 if (unlikely(!p))
3398                         goto out_overflow;
3399                 xdr_decode_hyper(p, fileid);
3400                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3401                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3402         }
3403         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3404         return ret;
3405 out_overflow:
3406         print_overflow_msg(__func__, xdr);
3407         return -EIO;
3408 }
3409
3410 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3411 {
3412         __be32 *p;
3413         int status = 0;
3414
3415         *res = 0;
3416         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3417                 return -EIO;
3418         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3419                 p = xdr_inline_decode(xdr, 8);
3420                 if (unlikely(!p))
3421                         goto out_overflow;
3422                 xdr_decode_hyper(p, res);
3423                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3424         }
3425         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3426         return status;
3427 out_overflow:
3428         print_overflow_msg(__func__, xdr);
3429         return -EIO;
3430 }
3431
3432 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3433 {
3434         __be32 *p;
3435         int status = 0;
3436
3437         *res = 0;
3438         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3439                 return -EIO;
3440         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3441                 p = xdr_inline_decode(xdr, 8);
3442                 if (unlikely(!p))
3443                         goto out_overflow;
3444                 xdr_decode_hyper(p, res);
3445                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3446         }
3447         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3448         return status;
3449 out_overflow:
3450         print_overflow_msg(__func__, xdr);
3451         return -EIO;
3452 }
3453
3454 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3455 {
3456         __be32 *p;
3457         int status = 0;
3458
3459         *res = 0;
3460         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3461                 return -EIO;
3462         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3463                 p = xdr_inline_decode(xdr, 8);
3464                 if (unlikely(!p))
3465                         goto out_overflow;
3466                 xdr_decode_hyper(p, res);
3467                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3468         }
3469         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3470         return status;
3471 out_overflow:
3472         print_overflow_msg(__func__, xdr);
3473         return -EIO;
3474 }
3475
3476 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3477 {
3478         u32 n;
3479         __be32 *p;
3480         int status = 0;
3481
3482         p = xdr_inline_decode(xdr, 4);
3483         if (unlikely(!p))
3484                 goto out_overflow;
3485         n = be32_to_cpup(p);
3486         if (n == 0)
3487                 goto root_path;
3488         dprintk("pathname4: ");
3489         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3490                 dprintk("cannot parse %d components in path\n", n);
3491                 goto out_eio;
3492         }
3493         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3494                 struct nfs4_string *component = &path->components[path->ncomponents];
3495                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3496                 if (unlikely(status != 0))
3497                         goto out_eio;
3498                 ifdebug (XDR)
3499                         pr_cont("%s%.*s ",
3500                                 (path->ncomponents != n ? "/ " : ""),
3501                                 component->len, component->data);
3502         }
3503 out:
3504         return status;
3505 root_path:
3506 /* a root pathname is sent as a zero component4 */
3507         path->ncomponents = 1;
3508         path->components[0].len=0;
3509         path->components[0].data=NULL;
3510         dprintk("pathname4: /\n");
3511         goto out;
3512 out_eio:
3513         dprintk(" status %d", status);
3514         status = -EIO;
3515         goto out;
3516 out_overflow:
3517         print_overflow_msg(__func__, xdr);
3518         return -EIO;
3519 }
3520
3521 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3522 {
3523         int n;
3524         __be32 *p;
3525         int status = -EIO;
3526
3527         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3528                 goto out;
3529         status = 0;
3530         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3531                 goto out;
3532         status = -EIO;
3533         /* Ignore borken servers that return unrequested attrs */
3534         if (unlikely(res == NULL))
3535                 goto out;
3536         dprintk("%s: fsroot:\n", __func__);
3537         status = decode_pathname(xdr, &res->fs_path);
3538         if (unlikely(status != 0))
3539                 goto out;
3540         p = xdr_inline_decode(xdr, 4);
3541         if (unlikely(!p))
3542                 goto out_overflow;
3543         n = be32_to_cpup(p);
3544         if (n <= 0)
3545                 goto out_eio;
3546         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3547                 u32 m;
3548                 struct nfs4_fs_location *loc;
3549
3550                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3551                         break;
3552                 loc = &res->locations[res->nlocations];
3553                 p = xdr_inline_decode(xdr, 4);
3554                 if (unlikely(!p))
3555                         goto out_overflow;
3556                 m = be32_to_cpup(p);
3557
3558                 dprintk("%s: servers:\n", __func__);
3559                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3560                         struct nfs4_string *server;
3561
3562                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3563                                 unsigned int i;
3564                                 dprintk("%s: using first %u of %u servers "
3565                                         "returned for location %u\n",
3566                                                 __func__,
3567                                                 NFS4_FS_LOCATION_MAXSERVERS,
3568                                                 m, res->nlocations);
3569                                 for (i = loc->nservers; i < m; i++) {
3570                                         unsigned int len;
3571                                         char *data;
3572                                         status = decode_opaque_inline(xdr, &len, &data);
3573                                         if (unlikely(status != 0))
3574                                                 goto out_eio;
3575                                 }
3576                                 break;
3577                         }
3578                         server = &loc->servers[loc->nservers];
3579                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3580                         if (unlikely(status != 0))
3581                                 goto out_eio;
3582                         dprintk("%s ", server->data);
3583                 }
3584                 status = decode_pathname(xdr, &loc->rootpath);
3585                 if (unlikely(status != 0))
3586                         goto out_eio;
3587         }
3588         if (res->nlocations != 0)
3589                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3590 out:
3591         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3592         return status;
3593 out_overflow:
3594         print_overflow_msg(__func__, xdr);
3595 out_eio:
3596         status = -EIO;
3597         goto out;
3598 }
3599
3600 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3601 {
3602         __be32 *p;
3603         int status = 0;
3604
3605         *res = 0;
3606         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3607                 return -EIO;
3608         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3609                 p = xdr_inline_decode(xdr, 8);
3610                 if (unlikely(!p))
3611                         goto out_overflow;
3612                 xdr_decode_hyper(p, res);
3613                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3614         }
3615         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3616         return status;
3617 out_overflow:
3618         print_overflow_msg(__func__, xdr);
3619         return -EIO;
3620 }
3621
3622 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3623 {
3624         __be32 *p;
3625         int status = 0;
3626
3627         *maxlink = 1;
3628         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3629                 return -EIO;
3630         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3631                 p = xdr_inline_decode(xdr, 4);
3632                 if (unlikely(!p))
3633                         goto out_overflow;
3634                 *maxlink = be32_to_cpup(p);
3635                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3636         }
3637         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3638         return status;
3639 out_overflow:
3640         print_overflow_msg(__func__, xdr);
3641         return -EIO;
3642 }
3643
3644 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3645 {
3646         __be32 *p;
3647         int status = 0;
3648
3649         *maxname = 1024;
3650         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3651                 return -EIO;
3652         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3653                 p = xdr_inline_decode(xdr, 4);
3654                 if (unlikely(!p))
3655                         goto out_overflow;
3656                 *maxname = be32_to_cpup(p);
3657                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3658         }
3659         dprintk("%s: maxname=%u\n", __func__, *maxname);
3660         return status;
3661 out_overflow:
3662         print_overflow_msg(__func__, xdr);
3663         return -EIO;
3664 }
3665
3666 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3667 {
3668         __be32 *p;
3669         int status = 0;
3670
3671         *res = 1024;
3672         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3673                 return -EIO;
3674         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3675                 uint64_t maxread;
3676                 p = xdr_inline_decode(xdr, 8);
3677                 if (unlikely(!p))
3678                         goto out_overflow;
3679                 xdr_decode_hyper(p, &maxread);
3680                 if (maxread > 0x7FFFFFFF)
3681                         maxread = 0x7FFFFFFF;
3682                 *res = (uint32_t)maxread;
3683                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3684         }
3685         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3686         return status;
3687 out_overflow:
3688         print_overflow_msg(__func__, xdr);
3689         return -EIO;
3690 }
3691
3692 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3693 {
3694         __be32 *p;
3695         int status = 0;
3696
3697         *res = 1024;
3698         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3699                 return -EIO;
3700         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3701                 uint64_t maxwrite;
3702                 p = xdr_inline_decode(xdr, 8);
3703                 if (unlikely(!p))
3704                         goto out_overflow;
3705                 xdr_decode_hyper(p, &maxwrite);
3706                 if (maxwrite > 0x7FFFFFFF)
3707                         maxwrite = 0x7FFFFFFF;
3708                 *res = (uint32_t)maxwrite;
3709                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3710         }
3711         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3712         return status;
3713 out_overflow:
3714         print_overflow_msg(__func__, xdr);
3715         return -EIO;
3716 }
3717
3718 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3719 {
3720         uint32_t tmp;
3721         __be32 *p;
3722         int ret = 0;
3723
3724         *mode = 0;
3725         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3726                 return -EIO;
3727         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3728                 p = xdr_inline_decode(xdr, 4);
3729                 if (unlikely(!p))
3730                         goto out_overflow;
3731                 tmp = be32_to_cpup(p);
3732                 *mode = tmp & ~S_IFMT;
3733                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3734                 ret = NFS_ATTR_FATTR_MODE;
3735         }
3736         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3737         return ret;
3738 out_overflow:
3739         print_overflow_msg(__func__, xdr);
3740         return -EIO;
3741 }
3742
3743 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3744 {
3745         __be32 *p;
3746         int ret = 0;
3747
3748         *nlink = 1;
3749         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3750                 return -EIO;
3751         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3752                 p = xdr_inline_decode(xdr, 4);
3753                 if (unlikely(!p))
3754                         goto out_overflow;
3755                 *nlink = be32_to_cpup(p);
3756                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3757                 ret = NFS_ATTR_FATTR_NLINK;
3758         }
3759         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3760         return ret;
3761 out_overflow:
3762         print_overflow_msg(__func__, xdr);
3763         return -EIO;
3764 }
3765
3766 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3767                 const struct nfs_server *server, kuid_t *uid,
3768                 struct nfs4_string *owner_name)
3769 {
3770         uint32_t len;
3771         __be32 *p;
3772         int ret = 0;
3773
3774         *uid = make_kuid(&init_user_ns, -2);
3775         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3776                 return -EIO;
3777         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3778                 p = xdr_inline_decode(xdr, 4);
3779                 if (unlikely(!p))
3780                         goto out_overflow;
3781                 len = be32_to_cpup(p);
3782                 p = xdr_inline_decode(xdr, len);
3783                 if (unlikely(!p))
3784                         goto out_overflow;
3785                 if (owner_name != NULL) {
3786                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3787                         if (owner_name->data != NULL) {
3788                                 owner_name->len = len;
3789                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3790                         }
3791                 } else if (len < XDR_MAX_NETOBJ) {
3792                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3793                                 ret = NFS_ATTR_FATTR_OWNER;
3794                         else
3795                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3796                                                 __func__);
3797                 } else
3798                         dprintk("%s: name too long (%u)!\n",
3799                                         __func__, len);
3800                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3801         }
3802         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3803         return ret;
3804 out_overflow:
3805         print_overflow_msg(__func__, xdr);
3806         return -EIO;
3807 }
3808
3809 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3810                 const struct nfs_server *server, kgid_t *gid,
3811                 struct nfs4_string *group_name)
3812 {
3813         uint32_t len;
3814         __be32 *p;
3815         int ret = 0;
3816
3817         *gid = make_kgid(&init_user_ns, -2);
3818         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3819                 return -EIO;
3820         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3821                 p = xdr_inline_decode(xdr, 4);
3822                 if (unlikely(!p))
3823                         goto out_overflow;
3824                 len = be32_to_cpup(p);
3825                 p = xdr_inline_decode(xdr, len);
3826                 if (unlikely(!p))
3827                         goto out_overflow;
3828                 if (group_name != NULL) {
3829                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3830                         if (group_name->data != NULL) {
3831                                 group_name->len = len;
3832                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3833                         }
3834                 } else if (len < XDR_MAX_NETOBJ) {
3835                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3836                                 ret = NFS_ATTR_FATTR_GROUP;
3837                         else
3838                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3839                                                 __func__);
3840                 } else
3841                         dprintk("%s: name too long (%u)!\n",
3842                                         __func__, len);
3843                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3844         }
3845         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3846         return ret;
3847 out_overflow:
3848         print_overflow_msg(__func__, xdr);
3849         return -EIO;
3850 }
3851
3852 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3853 {
3854         uint32_t major = 0, minor = 0;
3855         __be32 *p;
3856         int ret = 0;
3857
3858         *rdev = MKDEV(0,0);
3859         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3860                 return -EIO;
3861         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3862                 dev_t tmp;
3863
3864                 p = xdr_inline_decode(xdr, 8);
3865                 if (unlikely(!p))
3866                         goto out_overflow;
3867                 major = be32_to_cpup(p++);
3868                 minor = be32_to_cpup(p);
3869                 tmp = MKDEV(major, minor);
3870                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3871                         *rdev = tmp;
3872                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3873                 ret = NFS_ATTR_FATTR_RDEV;
3874         }
3875         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3876         return ret;
3877 out_overflow:
3878         print_overflow_msg(__func__, xdr);
3879         return -EIO;
3880 }
3881
3882 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3883 {
3884         __be32 *p;
3885         int status = 0;
3886
3887         *res = 0;
3888         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3889                 return -EIO;
3890         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3891                 p = xdr_inline_decode(xdr, 8);
3892                 if (unlikely(!p))
3893                         goto out_overflow;
3894                 xdr_decode_hyper(p, res);
3895                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3896         }
3897         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3898         return status;
3899 out_overflow:
3900         print_overflow_msg(__func__, xdr);
3901         return -EIO;
3902 }
3903
3904 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3905 {
3906         __be32 *p;
3907         int status = 0;
3908
3909         *res = 0;
3910         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3911                 return -EIO;
3912         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3913                 p = xdr_inline_decode(xdr, 8);
3914                 if (unlikely(!p))
3915                         goto out_overflow;
3916                 xdr_decode_hyper(p, res);
3917                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3918         }
3919         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3920         return status;
3921 out_overflow:
3922         print_overflow_msg(__func__, xdr);
3923         return -EIO;
3924 }
3925
3926 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3927 {
3928         __be32 *p;
3929         int status = 0;
3930
3931         *res = 0;
3932         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3933                 return -EIO;
3934         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3935                 p = xdr_inline_decode(xdr, 8);
3936                 if (unlikely(!p))
3937                         goto out_overflow;
3938                 xdr_decode_hyper(p, res);
3939                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3940         }
3941         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3942         return status;
3943 out_overflow:
3944         print_overflow_msg(__func__, xdr);
3945         return -EIO;
3946 }
3947
3948 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3949 {
3950         __be32 *p;
3951         int ret = 0;
3952
3953         *used = 0;
3954         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3955                 return -EIO;
3956         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3957                 p = xdr_inline_decode(xdr, 8);
3958                 if (unlikely(!p))
3959                         goto out_overflow;
3960                 xdr_decode_hyper(p, used);
3961                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3962                 ret = NFS_ATTR_FATTR_SPACE_USED;
3963         }
3964         dprintk("%s: space used=%Lu\n", __func__,
3965                         (unsigned long long)*used);
3966         return ret;
3967 out_overflow:
3968         print_overflow_msg(__func__, xdr);
3969         return -EIO;
3970 }
3971
3972 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3973 {
3974         __be32 *p;
3975         uint64_t sec;
3976         uint32_t nsec;
3977
3978         p = xdr_inline_decode(xdr, 12);
3979         if (unlikely(!p))
3980                 goto out_overflow;
3981         p = xdr_decode_hyper(p, &sec);
3982         nsec = be32_to_cpup(p);
3983         time->tv_sec = (time_t)sec;
3984         time->tv_nsec = (long)nsec;
3985         return 0;
3986 out_overflow:
3987         print_overflow_msg(__func__, xdr);
3988         return -EIO;
3989 }
3990
3991 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3992 {
3993         int status = 0;
3994
3995         time->tv_sec = 0;
3996         time->tv_nsec = 0;
3997         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3998                 return -EIO;
3999         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4000                 status = decode_attr_time(xdr, time);
4001                 if (status == 0)
4002                         status = NFS_ATTR_FATTR_ATIME;
4003                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4004         }
4005         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4006         return status;
4007 }
4008
4009 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4010 {
4011         int status = 0;
4012
4013         time->tv_sec = 0;
4014         time->tv_nsec = 0;
4015         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4016                 return -EIO;
4017         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4018                 status = decode_attr_time(xdr, time);
4019                 if (status == 0)
4020                         status = NFS_ATTR_FATTR_CTIME;
4021                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4022         }
4023         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4024         return status;
4025 }
4026
4027 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4028                                   struct timespec *time)
4029 {
4030         int status = 0;
4031
4032         time->tv_sec = 0;
4033         time->tv_nsec = 0;
4034         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4035                 return -EIO;
4036         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4037                 status = decode_attr_time(xdr, time);
4038                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4039         }
4040         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4041                 (long)time->tv_nsec);
4042         return status;
4043 }
4044
4045 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4046 {
4047         int status = 0;
4048
4049         time->tv_sec = 0;
4050         time->tv_nsec = 0;
4051         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4052                 return -EIO;
4053         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4054                 status = decode_attr_time(xdr, time);
4055                 if (status == 0)
4056                         status = NFS_ATTR_FATTR_MTIME;
4057                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4058         }
4059         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4060         return status;
4061 }
4062
4063 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4064 {
4065         unsigned int attrwords = XDR_QUADLEN(attrlen);
4066         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4067
4068         if (unlikely(attrwords != nwords)) {
4069                 dprintk("%s: server returned incorrect attribute length: "
4070                         "%u %c %u\n",
4071                                 __func__,
4072                                 attrwords << 2,
4073                                 (attrwords < nwords) ? '<' : '>',
4074                                 nwords << 2);
4075                 return -EIO;
4076         }
4077         return 0;
4078 }
4079
4080 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4081 {
4082         __be32 *p;
4083
4084         p = xdr_inline_decode(xdr, 20);
4085         if (unlikely(!p))
4086                 goto out_overflow;
4087         cinfo->atomic = be32_to_cpup(p++);
4088         p = xdr_decode_hyper(p, &cinfo->before);
4089         xdr_decode_hyper(p, &cinfo->after);
4090         return 0;
4091 out_overflow:
4092         print_overflow_msg(__func__, xdr);
4093         return -EIO;
4094 }
4095
4096 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4097 {
4098         __be32 *p;
4099         uint32_t supp, acc;
4100         int status;
4101
4102         status = decode_op_hdr(xdr, OP_ACCESS);
4103         if (status)
4104                 return status;
4105         p = xdr_inline_decode(xdr, 8);
4106         if (unlikely(!p))
4107                 goto out_overflow;
4108         supp = be32_to_cpup(p++);
4109         acc = be32_to_cpup(p);
4110         *supported = supp;
4111         *access = acc;
4112         return 0;
4113 out_overflow:
4114         print_overflow_msg(__func__, xdr);
4115         return -EIO;
4116 }
4117
4118 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4119 {
4120         __be32 *p;
4121
4122         p = xdr_inline_decode(xdr, len);
4123         if (likely(p)) {
4124                 memcpy(buf, p, len);
4125                 return 0;
4126         }
4127         print_overflow_msg(__func__, xdr);
4128         return -EIO;
4129 }
4130
4131 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4132 {
4133         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4134 }
4135
4136 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4137 {
4138         int status;
4139
4140         status = decode_op_hdr(xdr, OP_CLOSE);
4141         if (status != -EIO)
4142                 nfs_increment_open_seqid(status, res->seqid);
4143         if (!status)
4144                 status = decode_stateid(xdr, &res->stateid);
4145         return status;
4146 }
4147
4148 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4149 {
4150         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4151 }
4152
4153 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4154 {
4155         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4156 }
4157
4158 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4159 {
4160         int status;
4161
4162         status = decode_op_hdr(xdr, OP_COMMIT);
4163         if (!status)
4164                 status = decode_write_verifier(xdr, &res->verf->verifier);
4165         return status;
4166 }
4167
4168 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4169 {
4170         __be32 *p;
4171         uint32_t bmlen;
4172         int status;
4173
4174         status = decode_op_hdr(xdr, OP_CREATE);
4175         if (status)
4176                 return status;
4177         if ((status = decode_change_info(xdr, cinfo)))
4178                 return status;
4179         p = xdr_inline_decode(xdr, 4);
4180         if (unlikely(!p))
4181                 goto out_overflow;
4182         bmlen = be32_to_cpup(p);
4183         p = xdr_inline_decode(xdr, bmlen << 2);
4184         if (likely(p))
4185                 return 0;
4186 out_overflow:
4187         print_overflow_msg(__func__, xdr);
4188         return -EIO;
4189 }
4190
4191 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4192 {
4193         unsigned int savep;
4194         uint32_t attrlen, bitmap[3] = {0};
4195         int status;
4196
4197         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4198                 goto xdr_error;
4199         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4200                 goto xdr_error;
4201         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4202                 goto xdr_error;
4203         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4204                 goto xdr_error;
4205         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4206                                                  &res->fh_expire_type)) != 0)
4207                 goto xdr_error;
4208         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4209                 goto xdr_error;
4210         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4213                 goto xdr_error;
4214         status = verify_attr_len(xdr, savep, attrlen);
4215 xdr_error:
4216         dprintk("%s: xdr returned %d!\n", __func__, -status);
4217         return status;
4218 }
4219
4220 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4221 {
4222         unsigned int savep;
4223         uint32_t attrlen, bitmap[3] = {0};
4224         int status;
4225
4226         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4227                 goto xdr_error;
4228         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4229                 goto xdr_error;
4230         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4231                 goto xdr_error;
4232
4233         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4234                 goto xdr_error;
4235         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4236                 goto xdr_error;
4237         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4240                 goto xdr_error;
4241         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4244                 goto xdr_error;
4245
4246         status = verify_attr_len(xdr, savep, attrlen);
4247 xdr_error:
4248         dprintk("%s: xdr returned %d!\n", __func__, -status);
4249         return status;
4250 }
4251
4252 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4253 {
4254         unsigned int savep;
4255         uint32_t attrlen, bitmap[3] = {0};
4256         int status;
4257
4258         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4259                 goto xdr_error;
4260         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4261                 goto xdr_error;
4262         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4263                 goto xdr_error;
4264
4265         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4266                 goto xdr_error;
4267         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4268                 goto xdr_error;
4269
4270         status = verify_attr_len(xdr, savep, attrlen);
4271 xdr_error:
4272         dprintk("%s: xdr returned %d!\n", __func__, -status);
4273         return status;
4274 }
4275
4276 static int decode_threshold_hint(struct xdr_stream *xdr,
4277                                   uint32_t *bitmap,
4278                                   uint64_t *res,
4279                                   uint32_t hint_bit)
4280 {
4281         __be32 *p;
4282
4283         *res = 0;
4284         if (likely(bitmap[0] & hint_bit)) {
4285                 p = xdr_inline_decode(xdr, 8);
4286                 if (unlikely(!p))
4287                         goto out_overflow;
4288                 xdr_decode_hyper(p, res);
4289         }
4290         return 0;
4291 out_overflow:
4292         print_overflow_msg(__func__, xdr);
4293         return -EIO;
4294 }
4295
4296 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4297                                         struct nfs4_threshold *res)
4298 {
4299         __be32 *p;
4300         unsigned int savep;
4301         uint32_t bitmap[3] = {0,}, attrlen;
4302         int status;
4303
4304         /* layout type */
4305         p = xdr_inline_decode(xdr, 4);
4306         if (unlikely(!p)) {
4307                 print_overflow_msg(__func__, xdr);
4308                 return -EIO;
4309         }
4310         res->l_type = be32_to_cpup(p);
4311
4312         /* thi_hintset bitmap */
4313         status = decode_attr_bitmap(xdr, bitmap);
4314         if (status < 0)
4315                 goto xdr_error;
4316
4317         /* thi_hintlist length */
4318         status = decode_attr_length(xdr, &attrlen, &savep);
4319         if (status < 0)
4320                 goto xdr_error;
4321         /* thi_hintlist */
4322         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4323         if (status < 0)
4324                 goto xdr_error;
4325         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4326         if (status < 0)
4327                 goto xdr_error;
4328         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4329                                        THRESHOLD_RD_IO);
4330         if (status < 0)
4331                 goto xdr_error;
4332         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4333                                        THRESHOLD_WR_IO);
4334         if (status < 0)
4335                 goto xdr_error;
4336
4337         status = verify_attr_len(xdr, savep, attrlen);
4338         res->bm = bitmap[0];
4339
4340         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4341                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4342                 res->wr_io_sz);
4343 xdr_error:
4344         dprintk("%s ret=%d!\n", __func__, status);
4345         return status;
4346 }
4347
4348 /*
4349  * Thresholds on pNFS direct I/O vrs MDS I/O
4350  */
4351 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4352                                     uint32_t *bitmap,
4353                                     struct nfs4_threshold *res)
4354 {
4355         __be32 *p;
4356         int status = 0;
4357         uint32_t num;
4358
4359         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4360                 return -EIO;
4361         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4362                 /* Did the server return an unrequested attribute? */
4363                 if (unlikely(res == NULL))
4364                         return -EREMOTEIO;
4365                 p = xdr_inline_decode(xdr, 4);
4366                 if (unlikely(!p))
4367                         goto out_overflow;
4368                 num = be32_to_cpup(p);
4369                 if (num == 0)
4370                         return 0;
4371                 if (num > 1)
4372                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4373                                 "drivers per filesystem not supported\n",
4374                                 __func__);
4375
4376                 status = decode_first_threshold_item4(xdr, res);
4377                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4378         }
4379         return status;
4380 out_overflow:
4381         print_overflow_msg(__func__, xdr);
4382         return -EIO;
4383 }
4384
4385 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4386                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4387                 struct nfs4_fs_locations *fs_loc,
4388                 const struct nfs_server *server)
4389 {
4390         int status;
4391         umode_t fmode = 0;
4392         uint32_t type;
4393         int32_t err;
4394
4395         status = decode_attr_type(xdr, bitmap, &type);
4396         if (status < 0)
4397                 goto xdr_error;
4398         fattr->mode = 0;
4399         if (status != 0) {
4400                 fattr->mode |= nfs_type2fmt[type];
4401                 fattr->valid |= status;
4402         }
4403
4404         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4405         if (status < 0)
4406                 goto xdr_error;
4407         fattr->valid |= status;
4408
4409         status = decode_attr_size(xdr, bitmap, &fattr->size);
4410         if (status < 0)
4411                 goto xdr_error;
4412         fattr->valid |= status;
4413
4414         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4415         if (status < 0)
4416                 goto xdr_error;
4417         fattr->valid |= status;
4418
4419         err = 0;
4420         status = decode_attr_error(xdr, bitmap, &err);
4421         if (status < 0)
4422                 goto xdr_error;
4423
4424         status = decode_attr_filehandle(xdr, bitmap, fh);
4425         if (status < 0)
4426                 goto xdr_error;
4427
4428         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4429         if (status < 0)
4430                 goto xdr_error;
4431         fattr->valid |= status;
4432
4433         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4434         if (status < 0)
4435                 goto xdr_error;
4436         fattr->valid |= status;
4437
4438         status = decode_attr_mode(xdr, bitmap, &fmode);
4439         if (status < 0)
4440                 goto xdr_error;
4441         if (status != 0) {
4442                 fattr->mode |= fmode;
4443                 fattr->valid |= status;
4444         }
4445
4446         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4447         if (status < 0)
4448                 goto xdr_error;
4449         fattr->valid |= status;
4450
4451         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4452         if (status < 0)
4453                 goto xdr_error;
4454         fattr->valid |= status;
4455
4456         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4457         if (status < 0)
4458                 goto xdr_error;
4459         fattr->valid |= status;
4460
4461         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4462         if (status < 0)
4463                 goto xdr_error;
4464         fattr->valid |= status;
4465
4466         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4467         if (status < 0)
4468                 goto xdr_error;
4469         fattr->valid |= status;
4470
4471         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4472         if (status < 0)
4473                 goto xdr_error;
4474         fattr->valid |= status;
4475
4476         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4477         if (status < 0)
4478                 goto xdr_error;
4479         fattr->valid |= status;
4480
4481         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4482         if (status < 0)
4483                 goto xdr_error;
4484         fattr->valid |= status;
4485
4486         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4487         if (status < 0)
4488                 goto xdr_error;
4489         fattr->valid |= status;
4490
4491         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4492         if (status < 0)
4493                 goto xdr_error;
4494
4495 xdr_error:
4496         dprintk("%s: xdr returned %d\n", __func__, -status);
4497         return status;
4498 }
4499
4500 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4501                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4502                 const struct nfs_server *server)
4503 {
4504         unsigned int savep;
4505         uint32_t attrlen,
4506                  bitmap[3] = {0};
4507         int status;
4508
4509         status = decode_op_hdr(xdr, OP_GETATTR);
4510         if (status < 0)
4511                 goto xdr_error;
4512
4513         status = decode_attr_bitmap(xdr, bitmap);
4514         if (status < 0)
4515                 goto xdr_error;
4516
4517         status = decode_attr_length(xdr, &attrlen, &savep);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4522         if (status < 0)
4523                 goto xdr_error;
4524
4525         status = verify_attr_len(xdr, savep, attrlen);
4526 xdr_error:
4527         dprintk("%s: xdr returned %d\n", __func__, -status);
4528         return status;
4529 }
4530
4531 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4532                 const struct nfs_server *server)
4533 {
4534         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4535 }
4536
4537 /*
4538  * Decode potentially multiple layout types. Currently we only support
4539  * one layout driver per file system.
4540  */
4541 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4542                                          uint32_t *layouttype)
4543 {
4544         uint32_t *p;
4545         int num;
4546
4547         p = xdr_inline_decode(xdr, 4);
4548         if (unlikely(!p))
4549                 goto out_overflow;
4550         num = be32_to_cpup(p);
4551
4552         /* pNFS is not supported by the underlying file system */
4553         if (num == 0) {
4554                 *layouttype = 0;
4555                 return 0;
4556         }
4557         if (num > 1)
4558                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4559                         "drivers per filesystem not supported\n", __func__);
4560
4561         /* Decode and set first layout type, move xdr->p past unused types */
4562         p = xdr_inline_decode(xdr, num * 4);
4563         if (unlikely(!p))
4564                 goto out_overflow;
4565         *layouttype = be32_to_cpup(p);
4566         return 0;
4567 out_overflow:
4568         print_overflow_msg(__func__, xdr);
4569         return -EIO;
4570 }
4571
4572 /*
4573  * The type of file system exported.
4574  * Note we must ensure that layouttype is set in any non-error case.
4575  */
4576 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4577                                 uint32_t *layouttype)
4578 {
4579         int status = 0;
4580
4581         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4582         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4583                 return -EIO;
4584         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4585                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4586                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4587         } else
4588                 *layouttype = 0;
4589         return status;
4590 }
4591
4592 /*
4593  * The prefered block size for layout directed io
4594  */
4595 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4596                                       uint32_t *res)
4597 {
4598         __be32 *p;
4599
4600         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4601         *res = 0;
4602         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4603                 p = xdr_inline_decode(xdr, 4);
4604                 if (unlikely(!p)) {
4605                         print_overflow_msg(__func__, xdr);
4606                         return -EIO;
4607                 }
4608                 *res = be32_to_cpup(p);
4609                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4610         }
4611         return 0;
4612 }
4613
4614 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4615 {
4616         unsigned int savep;
4617         uint32_t attrlen, bitmap[3];
4618         int status;
4619
4620         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4621                 goto xdr_error;
4622         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4623                 goto xdr_error;
4624         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4625                 goto xdr_error;
4626
4627         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4628
4629         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4630                 goto xdr_error;
4631         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4632                 goto xdr_error;
4633         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4634                 goto xdr_error;
4635         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4636         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4637                 goto xdr_error;
4638         fsinfo->wtpref = fsinfo->wtmax;
4639         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4640         if (status != 0)
4641                 goto xdr_error;
4642         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4643         if (status != 0)
4644                 goto xdr_error;
4645         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4646         if (status)
4647                 goto xdr_error;
4648
4649         status = verify_attr_len(xdr, savep, attrlen);
4650 xdr_error:
4651         dprintk("%s: xdr returned %d!\n", __func__, -status);
4652         return status;
4653 }
4654
4655 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4656 {
4657         __be32 *p;
4658         uint32_t len;
4659         int status;
4660
4661         /* Zero handle first to allow comparisons */
4662         memset(fh, 0, sizeof(*fh));
4663
4664         status = decode_op_hdr(xdr, OP_GETFH);
4665         if (status)
4666                 return status;
4667
4668         p = xdr_inline_decode(xdr, 4);
4669         if (unlikely(!p))
4670                 goto out_overflow;
4671         len = be32_to_cpup(p);
4672         if (len > NFS4_FHSIZE)
4673                 return -EIO;
4674         fh->size = len;
4675         p = xdr_inline_decode(xdr, len);
4676         if (unlikely(!p))
4677                 goto out_overflow;
4678         memcpy(fh->data, p, len);
4679         return 0;
4680 out_overflow:
4681         print_overflow_msg(__func__, xdr);
4682         return -EIO;
4683 }
4684
4685 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4686 {
4687         int status;
4688
4689         status = decode_op_hdr(xdr, OP_LINK);
4690         if (status)
4691                 return status;
4692         return decode_change_info(xdr, cinfo);
4693 }
4694
4695 /*
4696  * We create the owner, so we know a proper owner.id length is 4.
4697  */
4698 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4699 {
4700         uint64_t offset, length, clientid;
4701         __be32 *p;
4702         uint32_t namelen, type;
4703
4704         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4705         if (unlikely(!p))
4706                 goto out_overflow;
4707         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4708         p = xdr_decode_hyper(p, &length);
4709         type = be32_to_cpup(p++); /* 4 byte read */
4710         if (fl != NULL) { /* manipulate file lock */
4711                 fl->fl_start = (loff_t)offset;
4712                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4713                 if (length == ~(uint64_t)0)
4714                         fl->fl_end = OFFSET_MAX;
4715                 fl->fl_type = F_WRLCK;
4716                 if (type & 1)
4717                         fl->fl_type = F_RDLCK;
4718                 fl->fl_pid = 0;
4719         }
4720         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4721         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4722         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4723         if (likely(p))
4724                 return -NFS4ERR_DENIED;
4725 out_overflow:
4726         print_overflow_msg(__func__, xdr);
4727         return -EIO;
4728 }
4729
4730 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4731 {
4732         int status;
4733
4734         status = decode_op_hdr(xdr, OP_LOCK);
4735         if (status == -EIO)
4736                 goto out;
4737         if (status == 0) {
4738                 status = decode_stateid(xdr, &res->stateid);
4739                 if (unlikely(status))
4740                         goto out;
4741         } else if (status == -NFS4ERR_DENIED)
4742                 status = decode_lock_denied(xdr, NULL);
4743         if (res->open_seqid != NULL)
4744                 nfs_increment_open_seqid(status, res->open_seqid);
4745         nfs_increment_lock_seqid(status, res->lock_seqid);
4746 out:
4747         return status;
4748 }
4749
4750 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4751 {
4752         int status;
4753         status = decode_op_hdr(xdr, OP_LOCKT);
4754         if (status == -NFS4ERR_DENIED)
4755                 return decode_lock_denied(xdr, res->denied);
4756         return status;
4757 }
4758
4759 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4760 {
4761         int status;
4762
4763         status = decode_op_hdr(xdr, OP_LOCKU);
4764         if (status != -EIO)
4765                 nfs_increment_lock_seqid(status, res->seqid);
4766         if (status == 0)
4767                 status = decode_stateid(xdr, &res->stateid);
4768         return status;
4769 }
4770
4771 static int decode_release_lockowner(struct xdr_stream *xdr)
4772 {
4773         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4774 }
4775
4776 static int decode_lookup(struct xdr_stream *xdr)
4777 {
4778         return decode_op_hdr(xdr, OP_LOOKUP);
4779 }
4780
4781 /* This is too sick! */
4782 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4783 {
4784         __be32 *p;
4785         uint32_t limit_type, nblocks, blocksize;
4786
4787         p = xdr_inline_decode(xdr, 12);
4788         if (unlikely(!p))
4789                 goto out_overflow;
4790         limit_type = be32_to_cpup(p++);
4791         switch (limit_type) {
4792         case 1:
4793                 xdr_decode_hyper(p, maxsize);
4794                 break;
4795         case 2:
4796                 nblocks = be32_to_cpup(p++);
4797                 blocksize = be32_to_cpup(p);
4798                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4799         }
4800         return 0;
4801 out_overflow:
4802         print_overflow_msg(__func__, xdr);
4803         return -EIO;
4804 }
4805
4806 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4807 {
4808         __be32 *p;
4809         uint32_t delegation_type;
4810         int status;
4811
4812         p = xdr_inline_decode(xdr, 4);
4813         if (unlikely(!p))
4814                 goto out_overflow;
4815         delegation_type = be32_to_cpup(p);
4816         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4817                 res->delegation_type = 0;
4818                 return 0;
4819         }
4820         status = decode_stateid(xdr, &res->delegation);
4821         if (unlikely(status))
4822                 return status;
4823         p = xdr_inline_decode(xdr, 4);
4824         if (unlikely(!p))
4825                 goto out_overflow;
4826         res->do_recall = be32_to_cpup(p);
4827
4828         switch (delegation_type) {
4829         case NFS4_OPEN_DELEGATE_READ:
4830                 res->delegation_type = FMODE_READ;
4831                 break;
4832         case NFS4_OPEN_DELEGATE_WRITE:
4833                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4834                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4835                                 return -EIO;
4836         }
4837         return decode_ace(xdr, NULL, res->server->nfs_client);
4838 out_overflow:
4839         print_overflow_msg(__func__, xdr);
4840         return -EIO;
4841 }
4842
4843 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4844 {
4845         __be32 *p;
4846         uint32_t savewords, bmlen, i;
4847         int status;
4848
4849         status = decode_op_hdr(xdr, OP_OPEN);
4850         if (status != -EIO)
4851                 nfs_increment_open_seqid(status, res->seqid);
4852         if (!status)
4853                 status = decode_stateid(xdr, &res->stateid);
4854         if (unlikely(status))
4855                 return status;
4856
4857         decode_change_info(xdr, &res->cinfo);
4858
4859         p = xdr_inline_decode(xdr, 8);
4860         if (unlikely(!p))
4861                 goto out_overflow;
4862         res->rflags = be32_to_cpup(p++);
4863         bmlen = be32_to_cpup(p);
4864         if (bmlen > 10)
4865                 goto xdr_error;
4866
4867         p = xdr_inline_decode(xdr, bmlen << 2);
4868         if (unlikely(!p))
4869                 goto out_overflow;
4870         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4871         for (i = 0; i < savewords; ++i)
4872                 res->attrset[i] = be32_to_cpup(p++);
4873         for (; i < NFS4_BITMAP_SIZE; i++)
4874                 res->attrset[i] = 0;
4875
4876         return decode_delegation(xdr, res);
4877 xdr_error:
4878         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4879         return -EIO;
4880 out_overflow:
4881         print_overflow_msg(__func__, xdr);
4882         return -EIO;
4883 }
4884
4885 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4886 {
4887         int status;
4888
4889         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4890         if (status != -EIO)
4891                 nfs_increment_open_seqid(status, res->seqid);
4892         if (!status)
4893                 status = decode_stateid(xdr, &res->stateid);
4894         return status;
4895 }
4896
4897 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4898 {
4899         int status;
4900
4901         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4902         if (status != -EIO)
4903                 nfs_increment_open_seqid(status, res->seqid);
4904         if (!status)
4905                 status = decode_stateid(xdr, &res->stateid);
4906         return status;
4907 }
4908
4909 static int decode_putfh(struct xdr_stream *xdr)
4910 {
4911         return decode_op_hdr(xdr, OP_PUTFH);
4912 }
4913
4914 static int decode_putrootfh(struct xdr_stream *xdr)
4915 {
4916         return decode_op_hdr(xdr, OP_PUTROOTFH);
4917 }
4918
4919 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4920 {
4921         __be32 *p;
4922         uint32_t count, eof, recvd;
4923         int status;
4924
4925         status = decode_op_hdr(xdr, OP_READ);
4926         if (status)
4927                 return status;
4928         p = xdr_inline_decode(xdr, 8);
4929         if (unlikely(!p))
4930                 goto out_overflow;
4931         eof = be32_to_cpup(p++);
4932         count = be32_to_cpup(p);
4933         recvd = xdr_read_pages(xdr, count);
4934         if (count > recvd) {
4935                 dprintk("NFS: server cheating in read reply: "
4936                                 "count %u > recvd %u\n", count, recvd);
4937                 count = recvd;
4938                 eof = 0;
4939         }
4940         res->eof = eof;
4941         res->count = count;
4942         return 0;
4943 out_overflow:
4944         print_overflow_msg(__func__, xdr);
4945         return -EIO;
4946 }
4947
4948 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4949 {
4950         int             status;
4951         __be32          verf[2];
4952
4953         status = decode_op_hdr(xdr, OP_READDIR);
4954         if (!status)
4955                 status = decode_verifier(xdr, readdir->verifier.data);
4956         if (unlikely(status))
4957                 return status;
4958         memcpy(verf, readdir->verifier.data, sizeof(verf));
4959         dprintk("%s: verifier = %08x:%08x\n",
4960                         __func__, verf[0], verf[1]);
4961         return xdr_read_pages(xdr, xdr->buf->page_len);
4962 }
4963
4964 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4965 {
4966         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4967         u32 len, recvd;
4968         __be32 *p;
4969         int status;
4970
4971         status = decode_op_hdr(xdr, OP_READLINK);
4972         if (status)
4973                 return status;
4974
4975         /* Convert length of symlink */
4976         p = xdr_inline_decode(xdr, 4);
4977         if (unlikely(!p))
4978                 goto out_overflow;
4979         len = be32_to_cpup(p);
4980         if (len >= rcvbuf->page_len || len <= 0) {
4981                 dprintk("nfs: server returned giant symlink!\n");
4982                 return -ENAMETOOLONG;
4983         }
4984         recvd = xdr_read_pages(xdr, len);
4985         if (recvd < len) {
4986                 dprintk("NFS: server cheating in readlink reply: "
4987                                 "count %u > recvd %u\n", len, recvd);
4988                 return -EIO;
4989         }
4990         /*
4991          * The XDR encode routine has set things up so that
4992          * the link text will be copied directly into the
4993          * buffer.  We just have to do overflow-checking,
4994          * and and null-terminate the text (the VFS expects
4995          * null-termination).
4996          */
4997         xdr_terminate_string(rcvbuf, len);
4998         return 0;
4999 out_overflow:
5000         print_overflow_msg(__func__, xdr);
5001         return -EIO;
5002 }
5003
5004 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5005 {
5006         int status;
5007
5008         status = decode_op_hdr(xdr, OP_REMOVE);
5009         if (status)
5010                 goto out;
5011         status = decode_change_info(xdr, cinfo);
5012 out:
5013         return status;
5014 }
5015
5016 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5017               struct nfs4_change_info *new_cinfo)
5018 {
5019         int status;
5020
5021         status = decode_op_hdr(xdr, OP_RENAME);
5022         if (status)
5023                 goto out;
5024         if ((status = decode_change_info(xdr, old_cinfo)))
5025                 goto out;
5026         status = decode_change_info(xdr, new_cinfo);
5027 out:
5028         return status;
5029 }
5030
5031 static int decode_renew(struct xdr_stream *xdr)
5032 {
5033         return decode_op_hdr(xdr, OP_RENEW);
5034 }
5035
5036 static int
5037 decode_restorefh(struct xdr_stream *xdr)
5038 {
5039         return decode_op_hdr(xdr, OP_RESTOREFH);
5040 }
5041
5042 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5043                          struct nfs_getaclres *res)
5044 {
5045         unsigned int savep;
5046         uint32_t attrlen,
5047                  bitmap[3] = {0};
5048         int status;
5049         unsigned int pg_offset;
5050
5051         res->acl_len = 0;
5052         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5053                 goto out;
5054
5055         xdr_enter_page(xdr, xdr->buf->page_len);
5056
5057         /* Calculate the offset of the page data */
5058         pg_offset = xdr->buf->head[0].iov_len;
5059
5060         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5061                 goto out;
5062         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5063                 goto out;
5064
5065         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5066                 return -EIO;
5067         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5068
5069                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5070                  * are stored with the acl data to handle the problem of
5071                  * variable length bitmaps.*/
5072                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5073                 res->acl_len = attrlen;
5074
5075                 /* Check for receive buffer overflow */
5076                 if (res->acl_len > (xdr->nwords << 2) ||
5077                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5078                         res->acl_flags |= NFS4_ACL_TRUNC;
5079                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5080                                         attrlen, xdr->nwords << 2);
5081                 }
5082         } else
5083                 status = -EOPNOTSUPP;
5084
5085 out:
5086         return status;
5087 }
5088
5089 static int
5090 decode_savefh(struct xdr_stream *xdr)
5091 {
5092         return decode_op_hdr(xdr, OP_SAVEFH);
5093 }
5094
5095 static int decode_setattr(struct xdr_stream *xdr)
5096 {
5097         __be32 *p;
5098         uint32_t bmlen;
5099         int status;
5100
5101         status = decode_op_hdr(xdr, OP_SETATTR);
5102         if (status)
5103                 return status;
5104         p = xdr_inline_decode(xdr, 4);
5105         if (unlikely(!p))
5106                 goto out_overflow;
5107         bmlen = be32_to_cpup(p);
5108         p = xdr_inline_decode(xdr, bmlen << 2);
5109         if (likely(p))
5110                 return 0;
5111 out_overflow:
5112         print_overflow_msg(__func__, xdr);
5113         return -EIO;
5114 }
5115
5116 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5117 {
5118         __be32 *p;
5119         uint32_t opnum;
5120         int32_t nfserr;
5121
5122         p = xdr_inline_decode(xdr, 8);
5123         if (unlikely(!p))
5124                 goto out_overflow;
5125         opnum = be32_to_cpup(p++);
5126         if (opnum != OP_SETCLIENTID) {
5127                 dprintk("nfs: decode_setclientid: Server returned operation"
5128                         " %d\n", opnum);
5129                 return -EIO;
5130         }
5131         nfserr = be32_to_cpup(p);
5132         if (nfserr == NFS_OK) {
5133                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5134                 if (unlikely(!p))
5135                         goto out_overflow;
5136                 p = xdr_decode_hyper(p, &res->clientid);
5137                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5138         } else if (nfserr == NFSERR_CLID_INUSE) {
5139                 uint32_t len;
5140
5141                 /* skip netid string */
5142                 p = xdr_inline_decode(xdr, 4);
5143                 if (unlikely(!p))
5144                         goto out_overflow;
5145                 len = be32_to_cpup(p);
5146                 p = xdr_inline_decode(xdr, len);
5147                 if (unlikely(!p))
5148                         goto out_overflow;
5149
5150                 /* skip uaddr string */
5151                 p = xdr_inline_decode(xdr, 4);
5152                 if (unlikely(!p))
5153                         goto out_overflow;
5154                 len = be32_to_cpup(p);
5155                 p = xdr_inline_decode(xdr, len);
5156                 if (unlikely(!p))
5157                         goto out_overflow;
5158                 return -NFSERR_CLID_INUSE;
5159         } else
5160                 return nfs4_stat_to_errno(nfserr);
5161
5162         return 0;
5163 out_overflow:
5164         print_overflow_msg(__func__, xdr);
5165         return -EIO;
5166 }
5167
5168 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5169 {
5170         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5171 }
5172
5173 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5174 {
5175         __be32 *p;
5176         int status;
5177
5178         status = decode_op_hdr(xdr, OP_WRITE);
5179         if (status)
5180                 return status;
5181
5182         p = xdr_inline_decode(xdr, 8);
5183         if (unlikely(!p))
5184                 goto out_overflow;
5185         res->count = be32_to_cpup(p++);
5186         res->verf->committed = be32_to_cpup(p++);
5187         return decode_write_verifier(xdr, &res->verf->verifier);
5188 out_overflow:
5189         print_overflow_msg(__func__, xdr);
5190         return -EIO;
5191 }
5192
5193 static int decode_delegreturn(struct xdr_stream *xdr)
5194 {
5195         return decode_op_hdr(xdr, OP_DELEGRETURN);
5196 }
5197
5198 static int decode_secinfo_gss(struct xdr_stream *xdr,
5199                               struct nfs4_secinfo4 *flavor)
5200 {
5201         u32 oid_len;
5202         __be32 *p;
5203
5204         p = xdr_inline_decode(xdr, 4);
5205         if (unlikely(!p))
5206                 goto out_overflow;
5207         oid_len = be32_to_cpup(p);
5208         if (oid_len > GSS_OID_MAX_LEN)
5209                 goto out_err;
5210
5211         p = xdr_inline_decode(xdr, oid_len);
5212         if (unlikely(!p))
5213                 goto out_overflow;
5214         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5215         flavor->flavor_info.oid.len = oid_len;
5216
5217         p = xdr_inline_decode(xdr, 8);
5218         if (unlikely(!p))
5219                 goto out_overflow;
5220         flavor->flavor_info.qop = be32_to_cpup(p++);
5221         flavor->flavor_info.service = be32_to_cpup(p);
5222
5223         return 0;
5224
5225 out_overflow:
5226         print_overflow_msg(__func__, xdr);
5227         return -EIO;
5228 out_err:
5229         return -EINVAL;
5230 }
5231
5232 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5233 {
5234         struct nfs4_secinfo4 *sec_flavor;
5235         unsigned int i, num_flavors;
5236         int status;
5237         __be32 *p;
5238
5239         p = xdr_inline_decode(xdr, 4);
5240         if (unlikely(!p))
5241                 goto out_overflow;
5242
5243         res->flavors->num_flavors = 0;
5244         num_flavors = be32_to_cpup(p);
5245
5246         for (i = 0; i < num_flavors; i++) {
5247                 sec_flavor = &res->flavors->flavors[i];
5248                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5249                         break;
5250
5251                 p = xdr_inline_decode(xdr, 4);
5252                 if (unlikely(!p))
5253                         goto out_overflow;
5254                 sec_flavor->flavor = be32_to_cpup(p);
5255
5256                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5257                         status = decode_secinfo_gss(xdr, sec_flavor);
5258                         if (status)
5259                                 goto out;
5260                 }
5261                 res->flavors->num_flavors++;
5262         }
5263
5264         status = 0;
5265 out:
5266         return status;
5267 out_overflow:
5268         print_overflow_msg(__func__, xdr);
5269         return -EIO;
5270 }
5271
5272 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5273 {
5274         int status = decode_op_hdr(xdr, OP_SECINFO);
5275         if (status)
5276                 return status;
5277         return decode_secinfo_common(xdr, res);
5278 }
5279
5280 #if defined(CONFIG_NFS_V4_1)
5281 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5282 {
5283         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5284         if (status)
5285                 return status;
5286         return decode_secinfo_common(xdr, res);
5287 }
5288
5289 static int decode_exchange_id(struct xdr_stream *xdr,
5290                               struct nfs41_exchange_id_res *res)
5291 {
5292         __be32 *p;
5293         uint32_t dummy;
5294         char *dummy_str;
5295         int status;
5296         uint32_t impl_id_count;
5297
5298         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5299         if (status)
5300                 return status;
5301
5302         p = xdr_inline_decode(xdr, 8);
5303         if (unlikely(!p))
5304                 goto out_overflow;
5305         xdr_decode_hyper(p, &res->clientid);
5306         p = xdr_inline_decode(xdr, 12);
5307         if (unlikely(!p))
5308                 goto out_overflow;
5309         res->seqid = be32_to_cpup(p++);
5310         res->flags = be32_to_cpup(p++);
5311
5312         /* We ask for SP4_NONE */
5313         dummy = be32_to_cpup(p);
5314         if (dummy != SP4_NONE)
5315                 return -EIO;
5316
5317         /* server_owner4.so_minor_id */
5318         p = xdr_inline_decode(xdr, 8);
5319         if (unlikely(!p))
5320                 goto out_overflow;
5321         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5322
5323         /* server_owner4.so_major_id */
5324         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5325         if (unlikely(status))
5326                 return status;
5327         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5328                 return -EIO;
5329         memcpy(res->server_owner->major_id, dummy_str, dummy);
5330         res->server_owner->major_id_sz = dummy;
5331
5332         /* server_scope4 */
5333         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5334         if (unlikely(status))
5335                 return status;
5336         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5337                 return -EIO;
5338         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5339         res->server_scope->server_scope_sz = dummy;
5340
5341         /* Implementation Id */
5342         p = xdr_inline_decode(xdr, 4);
5343         if (unlikely(!p))
5344                 goto out_overflow;
5345         impl_id_count = be32_to_cpup(p++);
5346
5347         if (impl_id_count) {
5348                 /* nii_domain */
5349                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5350                 if (unlikely(status))
5351                         return status;
5352                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5353                         return -EIO;
5354                 memcpy(res->impl_id->domain, dummy_str, dummy);
5355
5356                 /* nii_name */
5357                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5358                 if (unlikely(status))
5359                         return status;
5360                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5361                         return -EIO;
5362                 memcpy(res->impl_id->name, dummy_str, dummy);
5363
5364                 /* nii_date */
5365                 p = xdr_inline_decode(xdr, 12);
5366                 if (unlikely(!p))
5367                         goto out_overflow;
5368                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5369                 res->impl_id->date.nseconds = be32_to_cpup(p);
5370
5371                 /* if there's more than one entry, ignore the rest */
5372         }
5373         return 0;
5374 out_overflow:
5375         print_overflow_msg(__func__, xdr);
5376         return -EIO;
5377 }
5378
5379 static int decode_chan_attrs(struct xdr_stream *xdr,
5380                              struct nfs4_channel_attrs *attrs)
5381 {
5382         __be32 *p;
5383         u32 nr_attrs, val;
5384
5385         p = xdr_inline_decode(xdr, 28);
5386         if (unlikely(!p))
5387                 goto out_overflow;
5388         val = be32_to_cpup(p++);        /* headerpadsz */
5389         if (val)
5390                 return -EINVAL;         /* no support for header padding yet */
5391         attrs->max_rqst_sz = be32_to_cpup(p++);
5392         attrs->max_resp_sz = be32_to_cpup(p++);
5393         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5394         attrs->max_ops = be32_to_cpup(p++);
5395         attrs->max_reqs = be32_to_cpup(p++);
5396         nr_attrs = be32_to_cpup(p);
5397         if (unlikely(nr_attrs > 1)) {
5398                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5399                         "count %u\n", __func__, nr_attrs);
5400                 return -EINVAL;
5401         }
5402         if (nr_attrs == 1) {
5403                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5404                 if (unlikely(!p))
5405                         goto out_overflow;
5406         }
5407         return 0;
5408 out_overflow:
5409         print_overflow_msg(__func__, xdr);
5410         return -EIO;
5411 }
5412
5413 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5414 {
5415         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5416 }
5417
5418 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5419                                 struct nfs41_bind_conn_to_session_res *res)
5420 {
5421         __be32 *p;
5422         int status;
5423
5424         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5425         if (!status)
5426                 status = decode_sessionid(xdr, &res->session->sess_id);
5427         if (unlikely(status))
5428                 return status;
5429
5430         /* dir flags, rdma mode bool */
5431         p = xdr_inline_decode(xdr, 8);
5432         if (unlikely(!p))
5433                 goto out_overflow;
5434
5435         res->dir = be32_to_cpup(p++);
5436         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5437                 return -EIO;
5438         if (be32_to_cpup(p) == 0)
5439                 res->use_conn_in_rdma_mode = false;
5440         else
5441                 res->use_conn_in_rdma_mode = true;
5442
5443         return 0;
5444 out_overflow:
5445         print_overflow_msg(__func__, xdr);
5446         return -EIO;
5447 }
5448
5449 static int decode_create_session(struct xdr_stream *xdr,
5450                                  struct nfs41_create_session_res *res)
5451 {
5452         __be32 *p;
5453         int status;
5454         struct nfs_client *clp = res->client;
5455         struct nfs4_session *session = clp->cl_session;
5456
5457         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5458         if (!status)
5459                 status = decode_sessionid(xdr, &session->sess_id);
5460         if (unlikely(status))
5461                 return status;
5462
5463         /* seqid, flags */
5464         p = xdr_inline_decode(xdr, 8);
5465         if (unlikely(!p))
5466                 goto out_overflow;
5467         clp->cl_seqid = be32_to_cpup(p++);
5468         session->flags = be32_to_cpup(p);
5469
5470         /* Channel attributes */
5471         status = decode_chan_attrs(xdr, &session->fc_attrs);
5472         if (!status)
5473                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5474         return status;
5475 out_overflow:
5476         print_overflow_msg(__func__, xdr);
5477         return -EIO;
5478 }
5479
5480 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5481 {
5482         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5483 }
5484
5485 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5486 {
5487         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5488 }
5489
5490 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5491 {
5492         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5493 }
5494 #endif /* CONFIG_NFS_V4_1 */
5495
5496 static int decode_sequence(struct xdr_stream *xdr,
5497                            struct nfs4_sequence_res *res,
5498                            struct rpc_rqst *rqstp)
5499 {
5500 #if defined(CONFIG_NFS_V4_1)
5501         struct nfs4_session *session;
5502         struct nfs4_sessionid id;
5503         u32 dummy;
5504         int status;
5505         __be32 *p;
5506
5507         if (res->sr_slot == NULL)
5508                 return 0;
5509
5510         status = decode_op_hdr(xdr, OP_SEQUENCE);
5511         if (!status)
5512                 status = decode_sessionid(xdr, &id);
5513         if (unlikely(status))
5514                 goto out_err;
5515
5516         /*
5517          * If the server returns different values for sessionID, slotID or
5518          * sequence number, the server is looney tunes.
5519          */
5520         status = -EREMOTEIO;
5521         session = res->sr_slot->table->session;
5522
5523         if (memcmp(id.data, session->sess_id.data,
5524                    NFS4_MAX_SESSIONID_LEN)) {
5525                 dprintk("%s Invalid session id\n", __func__);
5526                 goto out_err;
5527         }
5528
5529         p = xdr_inline_decode(xdr, 20);
5530         if (unlikely(!p))
5531                 goto out_overflow;
5532
5533         /* seqid */
5534         dummy = be32_to_cpup(p++);
5535         if (dummy != res->sr_slot->seq_nr) {
5536                 dprintk("%s Invalid sequence number\n", __func__);
5537                 goto out_err;
5538         }
5539         /* slot id */
5540         dummy = be32_to_cpup(p++);
5541         if (dummy != res->sr_slot->slot_nr) {
5542                 dprintk("%s Invalid slot id\n", __func__);
5543                 goto out_err;
5544         }
5545         /* highest slot id */
5546         res->sr_highest_slotid = be32_to_cpup(p++);
5547         /* target highest slot id */
5548         res->sr_target_highest_slotid = be32_to_cpup(p++);
5549         /* result flags */
5550         res->sr_status_flags = be32_to_cpup(p);
5551         status = 0;
5552 out_err:
5553         res->sr_status = status;
5554         return status;
5555 out_overflow:
5556         print_overflow_msg(__func__, xdr);
5557         status = -EIO;
5558         goto out_err;
5559 #else  /* CONFIG_NFS_V4_1 */
5560         return 0;
5561 #endif /* CONFIG_NFS_V4_1 */
5562 }
5563
5564 #if defined(CONFIG_NFS_V4_1)
5565 /*
5566  * TODO: Need to handle case when EOF != true;
5567  */
5568 static int decode_getdevicelist(struct xdr_stream *xdr,
5569                                 struct pnfs_devicelist *res)
5570 {
5571         __be32 *p;
5572         int status, i;
5573         nfs4_verifier verftemp;
5574
5575         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5576         if (status)
5577                 return status;
5578
5579         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5580         if (unlikely(!p))
5581                 goto out_overflow;
5582
5583         /* TODO: Skip cookie for now */
5584         p += 2;
5585
5586         /* Read verifier */
5587         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5588
5589         res->num_devs = be32_to_cpup(p);
5590
5591         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5592
5593         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5594                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5595                                 __func__, res->num_devs);
5596                 return -EIO;
5597         }
5598
5599         p = xdr_inline_decode(xdr,
5600                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5601         if (unlikely(!p))
5602                 goto out_overflow;
5603         for (i = 0; i < res->num_devs; i++)
5604                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5605                                             NFS4_DEVICEID4_SIZE);
5606         res->eof = be32_to_cpup(p);
5607         return 0;
5608 out_overflow:
5609         print_overflow_msg(__func__, xdr);
5610         return -EIO;
5611 }
5612
5613 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5614                                 struct pnfs_device *pdev)
5615 {
5616         __be32 *p;
5617         uint32_t len, type;
5618         int status;
5619
5620         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5621         if (status) {
5622                 if (status == -ETOOSMALL) {
5623                         p = xdr_inline_decode(xdr, 4);
5624                         if (unlikely(!p))
5625                                 goto out_overflow;
5626                         pdev->mincount = be32_to_cpup(p);
5627                         dprintk("%s: Min count too small. mincnt = %u\n",
5628                                 __func__, pdev->mincount);
5629                 }
5630                 return status;
5631         }
5632
5633         p = xdr_inline_decode(xdr, 8);
5634         if (unlikely(!p))
5635                 goto out_overflow;
5636         type = be32_to_cpup(p++);
5637         if (type != pdev->layout_type) {
5638                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5639                         __func__, pdev->layout_type, type);
5640                 return -EINVAL;
5641         }
5642         /*
5643          * Get the length of the opaque device_addr4. xdr_read_pages places
5644          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5645          * and places the remaining xdr data in xdr_buf->tail
5646          */
5647         pdev->mincount = be32_to_cpup(p);
5648         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5649                 goto out_overflow;
5650
5651         /* Parse notification bitmap, verifying that it is zero. */
5652         p = xdr_inline_decode(xdr, 4);
5653         if (unlikely(!p))
5654                 goto out_overflow;
5655         len = be32_to_cpup(p);
5656         if (len) {
5657                 uint32_t i;
5658
5659                 p = xdr_inline_decode(xdr, 4 * len);
5660                 if (unlikely(!p))
5661                         goto out_overflow;
5662                 for (i = 0; i < len; i++, p++) {
5663                         if (be32_to_cpup(p)) {
5664                                 dprintk("%s: notifications not supported\n",
5665                                         __func__);
5666                                 return -EIO;
5667                         }
5668                 }
5669         }
5670         return 0;
5671 out_overflow:
5672         print_overflow_msg(__func__, xdr);
5673         return -EIO;
5674 }
5675
5676 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5677                             struct nfs4_layoutget_res *res)
5678 {
5679         __be32 *p;
5680         int status;
5681         u32 layout_count;
5682         u32 recvd;
5683
5684         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5685         if (status)
5686                 return status;
5687         p = xdr_inline_decode(xdr, 4);
5688         if (unlikely(!p))
5689                 goto out_overflow;
5690         res->return_on_close = be32_to_cpup(p);
5691         decode_stateid(xdr, &res->stateid);
5692         p = xdr_inline_decode(xdr, 4);
5693         if (unlikely(!p))
5694                 goto out_overflow;
5695         layout_count = be32_to_cpup(p);
5696         if (!layout_count) {
5697                 dprintk("%s: server responded with empty layout array\n",
5698                         __func__);
5699                 return -EINVAL;
5700         }
5701
5702         p = xdr_inline_decode(xdr, 28);
5703         if (unlikely(!p))
5704                 goto out_overflow;
5705         p = xdr_decode_hyper(p, &res->range.offset);
5706         p = xdr_decode_hyper(p, &res->range.length);
5707         res->range.iomode = be32_to_cpup(p++);
5708         res->type = be32_to_cpup(p++);
5709         res->layoutp->len = be32_to_cpup(p);
5710
5711         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5712                 __func__,
5713                 (unsigned long)res->range.offset,
5714                 (unsigned long)res->range.length,
5715                 res->range.iomode,
5716                 res->type,
5717                 res->layoutp->len);
5718
5719         recvd = xdr_read_pages(xdr, res->layoutp->len);
5720         if (res->layoutp->len > recvd) {
5721                 dprintk("NFS: server cheating in layoutget reply: "
5722                                 "layout len %u > recvd %u\n",
5723                                 res->layoutp->len, recvd);
5724                 return -EINVAL;
5725         }
5726
5727         if (layout_count > 1) {
5728                 /* We only handle a length one array at the moment.  Any
5729                  * further entries are just ignored.  Note that this means
5730                  * the client may see a response that is less than the
5731                  * minimum it requested.
5732                  */
5733                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5734                         __func__, layout_count);
5735         }
5736
5737         return 0;
5738 out_overflow:
5739         print_overflow_msg(__func__, xdr);
5740         return -EIO;
5741 }
5742
5743 static int decode_layoutreturn(struct xdr_stream *xdr,
5744                                struct nfs4_layoutreturn_res *res)
5745 {
5746         __be32 *p;
5747         int status;
5748
5749         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5750         if (status)
5751                 return status;
5752         p = xdr_inline_decode(xdr, 4);
5753         if (unlikely(!p))
5754                 goto out_overflow;
5755         res->lrs_present = be32_to_cpup(p);
5756         if (res->lrs_present)
5757                 status = decode_stateid(xdr, &res->stateid);
5758         return status;
5759 out_overflow:
5760         print_overflow_msg(__func__, xdr);
5761         return -EIO;
5762 }
5763
5764 static int decode_layoutcommit(struct xdr_stream *xdr,
5765                                struct rpc_rqst *req,
5766                                struct nfs4_layoutcommit_res *res)
5767 {
5768         __be32 *p;
5769         __u32 sizechanged;
5770         int status;
5771
5772         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5773         res->status = status;
5774         if (status)
5775                 return status;
5776
5777         p = xdr_inline_decode(xdr, 4);
5778         if (unlikely(!p))
5779                 goto out_overflow;
5780         sizechanged = be32_to_cpup(p);
5781
5782         if (sizechanged) {
5783                 /* throw away new size */
5784                 p = xdr_inline_decode(xdr, 8);
5785                 if (unlikely(!p))
5786                         goto out_overflow;
5787         }
5788         return 0;
5789 out_overflow:
5790         print_overflow_msg(__func__, xdr);
5791         return -EIO;
5792 }
5793
5794 static int decode_test_stateid(struct xdr_stream *xdr,
5795                                struct nfs41_test_stateid_res *res)
5796 {
5797         __be32 *p;
5798         int status;
5799         int num_res;
5800
5801         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5802         if (status)
5803                 return status;
5804
5805         p = xdr_inline_decode(xdr, 4);
5806         if (unlikely(!p))
5807                 goto out_overflow;
5808         num_res = be32_to_cpup(p++);
5809         if (num_res != 1)
5810                 goto out;
5811
5812         p = xdr_inline_decode(xdr, 4);
5813         if (unlikely(!p))
5814                 goto out_overflow;
5815         res->status = be32_to_cpup(p++);
5816
5817         return status;
5818 out_overflow:
5819         print_overflow_msg(__func__, xdr);
5820 out:
5821         return -EIO;
5822 }
5823
5824 static int decode_free_stateid(struct xdr_stream *xdr,
5825                                struct nfs41_free_stateid_res *res)
5826 {
5827         __be32 *p;
5828         int status;
5829
5830         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5831         if (status)
5832                 return status;
5833
5834         p = xdr_inline_decode(xdr, 4);
5835         if (unlikely(!p))
5836                 goto out_overflow;
5837         res->status = be32_to_cpup(p++);
5838         return res->status;
5839 out_overflow:
5840         print_overflow_msg(__func__, xdr);
5841         return -EIO;
5842 }
5843 #endif /* CONFIG_NFS_V4_1 */
5844
5845 /*
5846  * END OF "GENERIC" DECODE ROUTINES.
5847  */
5848
5849 /*
5850  * Decode OPEN_DOWNGRADE response
5851  */
5852 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5853                                        struct xdr_stream *xdr,
5854                                        struct nfs_closeres *res)
5855 {
5856         struct compound_hdr hdr;
5857         int status;
5858
5859         status = decode_compound_hdr(xdr, &hdr);
5860         if (status)
5861                 goto out;
5862         status = decode_sequence(xdr, &res->seq_res, rqstp);
5863         if (status)
5864                 goto out;
5865         status = decode_putfh(xdr);
5866         if (status)
5867                 goto out;
5868         status = decode_open_downgrade(xdr, res);
5869         if (status != 0)
5870                 goto out;
5871         decode_getfattr(xdr, res->fattr, res->server);
5872 out:
5873         return status;
5874 }
5875
5876 /*
5877  * Decode ACCESS response
5878  */
5879 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5880                                struct nfs4_accessres *res)
5881 {
5882         struct compound_hdr hdr;
5883         int status;
5884
5885         status = decode_compound_hdr(xdr, &hdr);
5886         if (status)
5887                 goto out;
5888         status = decode_sequence(xdr, &res->seq_res, rqstp);
5889         if (status)
5890                 goto out;
5891         status = decode_putfh(xdr);
5892         if (status != 0)
5893                 goto out;
5894         status = decode_access(xdr, &res->supported, &res->access);
5895         if (status != 0)
5896                 goto out;
5897         decode_getfattr(xdr, res->fattr, res->server);
5898 out:
5899         return status;
5900 }
5901
5902 /*
5903  * Decode LOOKUP response
5904  */
5905 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5906                                struct nfs4_lookup_res *res)
5907 {
5908         struct compound_hdr hdr;
5909         int status;
5910
5911         status = decode_compound_hdr(xdr, &hdr);
5912         if (status)
5913                 goto out;
5914         status = decode_sequence(xdr, &res->seq_res, rqstp);
5915         if (status)
5916                 goto out;
5917         status = decode_putfh(xdr);
5918         if (status)
5919                 goto out;
5920         status = decode_lookup(xdr);
5921         if (status)
5922                 goto out;
5923         status = decode_getfh(xdr, res->fh);
5924         if (status)
5925                 goto out;
5926         status = decode_getfattr(xdr, res->fattr, res->server);
5927 out:
5928         return status;
5929 }
5930
5931 /*
5932  * Decode LOOKUP_ROOT response
5933  */
5934 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5935                                     struct xdr_stream *xdr,
5936                                     struct nfs4_lookup_res *res)
5937 {
5938         struct compound_hdr hdr;
5939         int status;
5940
5941         status = decode_compound_hdr(xdr, &hdr);
5942         if (status)
5943                 goto out;
5944         status = decode_sequence(xdr, &res->seq_res, rqstp);
5945         if (status)
5946                 goto out;
5947         status = decode_putrootfh(xdr);
5948         if (status)
5949                 goto out;
5950         status = decode_getfh(xdr, res->fh);
5951         if (status == 0)
5952                 status = decode_getfattr(xdr, res->fattr, res->server);
5953 out:
5954         return status;
5955 }
5956
5957 /*
5958  * Decode REMOVE response
5959  */
5960 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5961                                struct nfs_removeres *res)
5962 {
5963         struct compound_hdr hdr;
5964         int status;
5965
5966         status = decode_compound_hdr(xdr, &hdr);
5967         if (status)
5968                 goto out;
5969         status = decode_sequence(xdr, &res->seq_res, rqstp);
5970         if (status)
5971                 goto out;
5972         status = decode_putfh(xdr);
5973         if (status)
5974                 goto out;
5975         status = decode_remove(xdr, &res->cinfo);
5976 out:
5977         return status;
5978 }
5979
5980 /*
5981  * Decode RENAME response
5982  */
5983 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5984                                struct nfs_renameres *res)
5985 {
5986         struct compound_hdr hdr;
5987         int status;
5988
5989         status = decode_compound_hdr(xdr, &hdr);
5990         if (status)
5991                 goto out;
5992         status = decode_sequence(xdr, &res->seq_res, rqstp);
5993         if (status)
5994                 goto out;
5995         status = decode_putfh(xdr);
5996         if (status)
5997                 goto out;
5998         status = decode_savefh(xdr);
5999         if (status)
6000                 goto out;
6001         status = decode_putfh(xdr);
6002         if (status)
6003                 goto out;
6004         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6005 out:
6006         return status;
6007 }
6008
6009 /*
6010  * Decode LINK response
6011  */
6012 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6013                              struct nfs4_link_res *res)
6014 {
6015         struct compound_hdr hdr;
6016         int status;
6017
6018         status = decode_compound_hdr(xdr, &hdr);
6019         if (status)
6020                 goto out;
6021         status = decode_sequence(xdr, &res->seq_res, rqstp);
6022         if (status)
6023                 goto out;
6024         status = decode_putfh(xdr);
6025         if (status)
6026                 goto out;
6027         status = decode_savefh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_putfh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_link(xdr, &res->cinfo);
6034         if (status)
6035                 goto out;
6036         /*
6037          * Note order: OP_LINK leaves the directory as the current
6038          *             filehandle.
6039          */
6040         status = decode_restorefh(xdr);
6041         if (status)
6042                 goto out;
6043         decode_getfattr(xdr, res->fattr, res->server);
6044 out:
6045         return status;
6046 }
6047
6048 /*
6049  * Decode CREATE response
6050  */
6051 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6052                                struct nfs4_create_res *res)
6053 {
6054         struct compound_hdr hdr;
6055         int status;
6056
6057         status = decode_compound_hdr(xdr, &hdr);
6058         if (status)
6059                 goto out;
6060         status = decode_sequence(xdr, &res->seq_res, rqstp);
6061         if (status)
6062                 goto out;
6063         status = decode_putfh(xdr);
6064         if (status)
6065                 goto out;
6066         status = decode_create(xdr, &res->dir_cinfo);
6067         if (status)
6068                 goto out;
6069         status = decode_getfh(xdr, res->fh);
6070         if (status)
6071                 goto out;
6072         decode_getfattr(xdr, res->fattr, res->server);
6073 out:
6074         return status;
6075 }
6076
6077 /*
6078  * Decode SYMLINK response
6079  */
6080 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6081                                 struct nfs4_create_res *res)
6082 {
6083         return nfs4_xdr_dec_create(rqstp, xdr, res);
6084 }
6085
6086 /*
6087  * Decode GETATTR response
6088  */
6089 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6090                                 struct nfs4_getattr_res *res)
6091 {
6092         struct compound_hdr hdr;
6093         int status;
6094
6095         status = decode_compound_hdr(xdr, &hdr);
6096         if (status)
6097                 goto out;
6098         status = decode_sequence(xdr, &res->seq_res, rqstp);
6099         if (status)
6100                 goto out;
6101         status = decode_putfh(xdr);
6102         if (status)
6103                 goto out;
6104         status = decode_getfattr(xdr, res->fattr, res->server);
6105 out:
6106         return status;
6107 }
6108
6109 /*
6110  * Encode an SETACL request
6111  */
6112 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6113                                 struct nfs_setaclargs *args)
6114 {
6115         struct compound_hdr hdr = {
6116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6117         };
6118
6119         encode_compound_hdr(xdr, req, &hdr);
6120         encode_sequence(xdr, &args->seq_args, &hdr);
6121         encode_putfh(xdr, args->fh, &hdr);
6122         encode_setacl(xdr, args, &hdr);
6123         encode_nops(&hdr);
6124 }
6125
6126 /*
6127  * Decode SETACL response
6128  */
6129 static int
6130 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6131                     struct nfs_setaclres *res)
6132 {
6133         struct compound_hdr hdr;
6134         int status;
6135
6136         status = decode_compound_hdr(xdr, &hdr);
6137         if (status)
6138                 goto out;
6139         status = decode_sequence(xdr, &res->seq_res, rqstp);
6140         if (status)
6141                 goto out;
6142         status = decode_putfh(xdr);
6143         if (status)
6144                 goto out;
6145         status = decode_setattr(xdr);
6146 out:
6147         return status;
6148 }
6149
6150 /*
6151  * Decode GETACL response
6152  */
6153 static int
6154 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6155                     struct nfs_getaclres *res)
6156 {
6157         struct compound_hdr hdr;
6158         int status;
6159
6160         if (res->acl_scratch != NULL) {
6161                 void *p = page_address(res->acl_scratch);
6162                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6163         }
6164         status = decode_compound_hdr(xdr, &hdr);
6165         if (status)
6166                 goto out;
6167         status = decode_sequence(xdr, &res->seq_res, rqstp);
6168         if (status)
6169                 goto out;
6170         status = decode_putfh(xdr);
6171         if (status)
6172                 goto out;
6173         status = decode_getacl(xdr, rqstp, res);
6174
6175 out:
6176         return status;
6177 }
6178
6179 /*
6180  * Decode CLOSE response
6181  */
6182 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6183                               struct nfs_closeres *res)
6184 {
6185         struct compound_hdr hdr;
6186         int status;
6187
6188         status = decode_compound_hdr(xdr, &hdr);
6189         if (status)
6190                 goto out;
6191         status = decode_sequence(xdr, &res->seq_res, rqstp);
6192         if (status)
6193                 goto out;
6194         status = decode_putfh(xdr);
6195         if (status)
6196                 goto out;
6197         status = decode_close(xdr, res);
6198         if (status != 0)
6199                 goto out;
6200         /*
6201          * Note: Server may do delete on close for this file
6202          *      in which case the getattr call will fail with
6203          *      an ESTALE error. Shouldn't be a problem,
6204          *      though, since fattr->valid will remain unset.
6205          */
6206         decode_getfattr(xdr, res->fattr, res->server);
6207 out:
6208         return status;
6209 }
6210
6211 /*
6212  * Decode OPEN response
6213  */
6214 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6215                              struct nfs_openres *res)
6216 {
6217         struct compound_hdr hdr;
6218         int status;
6219
6220         status = decode_compound_hdr(xdr, &hdr);
6221         if (status)
6222                 goto out;
6223         status = decode_sequence(xdr, &res->seq_res, rqstp);
6224         if (status)
6225                 goto out;
6226         status = decode_putfh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_open(xdr, res);
6230         if (status)
6231                 goto out;
6232         status = decode_getfh(xdr, &res->fh);
6233         if (status)
6234                 goto out;
6235         if (res->access_request)
6236                 decode_access(xdr, &res->access_supported, &res->access_result);
6237         decode_getfattr(xdr, res->f_attr, res->server);
6238 out:
6239         return status;
6240 }
6241
6242 /*
6243  * Decode OPEN_CONFIRM response
6244  */
6245 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6246                                      struct xdr_stream *xdr,
6247                                      struct nfs_open_confirmres *res)
6248 {
6249         struct compound_hdr hdr;
6250         int status;
6251
6252         status = decode_compound_hdr(xdr, &hdr);
6253         if (status)
6254                 goto out;
6255         status = decode_putfh(xdr);
6256         if (status)
6257                 goto out;
6258         status = decode_open_confirm(xdr, res);
6259 out:
6260         return status;
6261 }
6262
6263 /*
6264  * Decode OPEN response
6265  */
6266 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6267                                     struct xdr_stream *xdr,
6268                                     struct nfs_openres *res)
6269 {
6270         struct compound_hdr hdr;
6271         int status;
6272
6273         status = decode_compound_hdr(xdr, &hdr);
6274         if (status)
6275                 goto out;
6276         status = decode_sequence(xdr, &res->seq_res, rqstp);
6277         if (status)
6278                 goto out;
6279         status = decode_putfh(xdr);
6280         if (status)
6281                 goto out;
6282         status = decode_open(xdr, res);
6283         if (status)
6284                 goto out;
6285         if (res->access_request)
6286                 decode_access(xdr, &res->access_supported, &res->access_result);
6287         decode_getfattr(xdr, res->f_attr, res->server);
6288 out:
6289         return status;
6290 }
6291
6292 /*
6293  * Decode SETATTR response
6294  */
6295 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6296                                 struct xdr_stream *xdr,
6297                                 struct nfs_setattrres *res)
6298 {
6299         struct compound_hdr hdr;
6300         int status;
6301
6302         status = decode_compound_hdr(xdr, &hdr);
6303         if (status)
6304                 goto out;
6305         status = decode_sequence(xdr, &res->seq_res, rqstp);
6306         if (status)
6307                 goto out;
6308         status = decode_putfh(xdr);
6309         if (status)
6310                 goto out;
6311         status = decode_setattr(xdr);
6312         if (status)
6313                 goto out;
6314         decode_getfattr(xdr, res->fattr, res->server);
6315 out:
6316         return status;
6317 }
6318
6319 /*
6320  * Decode LOCK response
6321  */
6322 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6323                              struct nfs_lock_res *res)
6324 {
6325         struct compound_hdr hdr;
6326         int status;
6327
6328         status = decode_compound_hdr(xdr, &hdr);
6329         if (status)
6330                 goto out;
6331         status = decode_sequence(xdr, &res->seq_res, rqstp);
6332         if (status)
6333                 goto out;
6334         status = decode_putfh(xdr);
6335         if (status)
6336                 goto out;
6337         status = decode_lock(xdr, res);
6338 out:
6339         return status;
6340 }
6341
6342 /*
6343  * Decode LOCKT response
6344  */
6345 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346                               struct nfs_lockt_res *res)
6347 {
6348         struct compound_hdr hdr;
6349         int status;
6350
6351         status = decode_compound_hdr(xdr, &hdr);
6352         if (status)
6353                 goto out;
6354         status = decode_sequence(xdr, &res->seq_res, rqstp);
6355         if (status)
6356                 goto out;
6357         status = decode_putfh(xdr);
6358         if (status)
6359                 goto out;
6360         status = decode_lockt(xdr, res);
6361 out:
6362         return status;
6363 }
6364
6365 /*
6366  * Decode LOCKU response
6367  */
6368 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6369                               struct nfs_locku_res *res)
6370 {
6371         struct compound_hdr hdr;
6372         int status;
6373
6374         status = decode_compound_hdr(xdr, &hdr);
6375         if (status)
6376                 goto out;
6377         status = decode_sequence(xdr, &res->seq_res, rqstp);
6378         if (status)
6379                 goto out;
6380         status = decode_putfh(xdr);
6381         if (status)
6382                 goto out;
6383         status = decode_locku(xdr, res);
6384 out:
6385         return status;
6386 }
6387
6388 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6389                                           struct xdr_stream *xdr, void *dummy)
6390 {
6391         struct compound_hdr hdr;
6392         int status;
6393
6394         status = decode_compound_hdr(xdr, &hdr);
6395         if (!status)
6396                 status = decode_release_lockowner(xdr);
6397         return status;
6398 }
6399
6400 /*
6401  * Decode READLINK response
6402  */
6403 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6404                                  struct xdr_stream *xdr,
6405                                  struct nfs4_readlink_res *res)
6406 {
6407         struct compound_hdr hdr;
6408         int status;
6409
6410         status = decode_compound_hdr(xdr, &hdr);
6411         if (status)
6412                 goto out;
6413         status = decode_sequence(xdr, &res->seq_res, rqstp);
6414         if (status)
6415                 goto out;
6416         status = decode_putfh(xdr);
6417         if (status)
6418                 goto out;
6419         status = decode_readlink(xdr, rqstp);
6420 out:
6421         return status;
6422 }
6423
6424 /*
6425  * Decode READDIR response
6426  */
6427 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6428                                 struct nfs4_readdir_res *res)
6429 {
6430         struct compound_hdr hdr;
6431         int status;
6432
6433         status = decode_compound_hdr(xdr, &hdr);
6434         if (status)
6435                 goto out;
6436         status = decode_sequence(xdr, &res->seq_res, rqstp);
6437         if (status)
6438                 goto out;
6439         status = decode_putfh(xdr);
6440         if (status)
6441                 goto out;
6442         status = decode_readdir(xdr, rqstp, res);
6443 out:
6444         return status;
6445 }
6446
6447 /*
6448  * Decode Read response
6449  */
6450 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6451                              struct nfs_readres *res)
6452 {
6453         struct compound_hdr hdr;
6454         int status;
6455
6456         status = decode_compound_hdr(xdr, &hdr);
6457         if (status)
6458                 goto out;
6459         status = decode_sequence(xdr, &res->seq_res, rqstp);
6460         if (status)
6461                 goto out;
6462         status = decode_putfh(xdr);
6463         if (status)
6464                 goto out;
6465         status = decode_read(xdr, rqstp, res);
6466         if (!status)
6467                 status = res->count;
6468 out:
6469         return status;
6470 }
6471
6472 /*
6473  * Decode WRITE response
6474  */
6475 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6476                               struct nfs_writeres *res)
6477 {
6478         struct compound_hdr hdr;
6479         int status;
6480
6481         status = decode_compound_hdr(xdr, &hdr);
6482         if (status)
6483                 goto out;
6484         status = decode_sequence(xdr, &res->seq_res, rqstp);
6485         if (status)
6486                 goto out;
6487         status = decode_putfh(xdr);
6488         if (status)
6489                 goto out;
6490         status = decode_write(xdr, res);
6491         if (status)
6492                 goto out;
6493         if (res->fattr)
6494                 decode_getfattr(xdr, res->fattr, res->server);
6495         if (!status)
6496                 status = res->count;
6497 out:
6498         return status;
6499 }
6500
6501 /*
6502  * Decode COMMIT response
6503  */
6504 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6505                                struct nfs_commitres *res)
6506 {
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (status)
6512                 goto out;
6513         status = decode_sequence(xdr, &res->seq_res, rqstp);
6514         if (status)
6515                 goto out;
6516         status = decode_putfh(xdr);
6517         if (status)
6518                 goto out;
6519         status = decode_commit(xdr, res);
6520 out:
6521         return status;
6522 }
6523
6524 /*
6525  * Decode FSINFO response
6526  */
6527 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6528                                struct nfs4_fsinfo_res *res)
6529 {
6530         struct compound_hdr hdr;
6531         int status;
6532
6533         status = decode_compound_hdr(xdr, &hdr);
6534         if (!status)
6535                 status = decode_sequence(xdr, &res->seq_res, req);
6536         if (!status)
6537                 status = decode_putfh(xdr);
6538         if (!status)
6539                 status = decode_fsinfo(xdr, res->fsinfo);
6540         return status;
6541 }
6542
6543 /*
6544  * Decode PATHCONF response
6545  */
6546 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6547                                  struct nfs4_pathconf_res *res)
6548 {
6549         struct compound_hdr hdr;
6550         int status;
6551
6552         status = decode_compound_hdr(xdr, &hdr);
6553         if (!status)
6554                 status = decode_sequence(xdr, &res->seq_res, req);
6555         if (!status)
6556                 status = decode_putfh(xdr);
6557         if (!status)
6558                 status = decode_pathconf(xdr, res->pathconf);
6559         return status;
6560 }
6561
6562 /*
6563  * Decode STATFS response
6564  */
6565 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6566                                struct nfs4_statfs_res *res)
6567 {
6568         struct compound_hdr hdr;
6569         int status;
6570
6571         status = decode_compound_hdr(xdr, &hdr);
6572         if (!status)
6573                 status = decode_sequence(xdr, &res->seq_res, req);
6574         if (!status)
6575                 status = decode_putfh(xdr);
6576         if (!status)
6577                 status = decode_statfs(xdr, res->fsstat);
6578         return status;
6579 }
6580
6581 /*
6582  * Decode GETATTR_BITMAP response
6583  */
6584 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6585                                     struct xdr_stream *xdr,
6586                                     struct nfs4_server_caps_res *res)
6587 {
6588         struct compound_hdr hdr;
6589         int status;
6590
6591         status = decode_compound_hdr(xdr, &hdr);
6592         if (status)
6593                 goto out;
6594         status = decode_sequence(xdr, &res->seq_res, req);
6595         if (status)
6596                 goto out;
6597         status = decode_putfh(xdr);
6598         if (status)
6599                 goto out;
6600         status = decode_server_caps(xdr, res);
6601 out:
6602         return status;
6603 }
6604
6605 /*
6606  * Decode RENEW response
6607  */
6608 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6609                               void *__unused)
6610 {
6611         struct compound_hdr hdr;
6612         int status;
6613
6614         status = decode_compound_hdr(xdr, &hdr);
6615         if (!status)
6616                 status = decode_renew(xdr);
6617         return status;
6618 }
6619
6620 /*
6621  * Decode SETCLIENTID response
6622  */
6623 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6624                                     struct xdr_stream *xdr,
6625                                     struct nfs4_setclientid_res *res)
6626 {
6627         struct compound_hdr hdr;
6628         int status;
6629
6630         status = decode_compound_hdr(xdr, &hdr);
6631         if (!status)
6632                 status = decode_setclientid(xdr, res);
6633         return status;
6634 }
6635
6636 /*
6637  * Decode SETCLIENTID_CONFIRM response
6638  */
6639 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6640                                             struct xdr_stream *xdr)
6641 {
6642         struct compound_hdr hdr;
6643         int status;
6644
6645         status = decode_compound_hdr(xdr, &hdr);
6646         if (!status)
6647                 status = decode_setclientid_confirm(xdr);
6648         return status;
6649 }
6650
6651 /*
6652  * Decode DELEGRETURN response
6653  */
6654 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6655                                     struct xdr_stream *xdr,
6656                                     struct nfs4_delegreturnres *res)
6657 {
6658         struct compound_hdr hdr;
6659         int status;
6660
6661         status = decode_compound_hdr(xdr, &hdr);
6662         if (status)
6663                 goto out;
6664         status = decode_sequence(xdr, &res->seq_res, rqstp);
6665         if (status)
6666                 goto out;
6667         status = decode_putfh(xdr);
6668         if (status != 0)
6669                 goto out;
6670         status = decode_getfattr(xdr, res->fattr, res->server);
6671         if (status != 0)
6672                 goto out;
6673         status = decode_delegreturn(xdr);
6674 out:
6675         return status;
6676 }
6677
6678 /*
6679  * Decode FS_LOCATIONS response
6680  */
6681 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6682                                      struct xdr_stream *xdr,
6683                                      struct nfs4_fs_locations_res *res)
6684 {
6685         struct compound_hdr hdr;
6686         int status;
6687
6688         status = decode_compound_hdr(xdr, &hdr);
6689         if (status)
6690                 goto out;
6691         status = decode_sequence(xdr, &res->seq_res, req);
6692         if (status)
6693                 goto out;
6694         status = decode_putfh(xdr);
6695         if (status)
6696                 goto out;
6697         status = decode_lookup(xdr);
6698         if (status)
6699                 goto out;
6700         xdr_enter_page(xdr, PAGE_SIZE);
6701         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6702                                          NULL, res->fs_locations,
6703                                          res->fs_locations->server);
6704 out:
6705         return status;
6706 }
6707
6708 /*
6709  * Decode SECINFO response
6710  */
6711 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6712                                 struct xdr_stream *xdr,
6713                                 struct nfs4_secinfo_res *res)
6714 {
6715         struct compound_hdr hdr;
6716         int status;
6717
6718         status = decode_compound_hdr(xdr, &hdr);
6719         if (status)
6720                 goto out;
6721         status = decode_sequence(xdr, &res->seq_res, rqstp);
6722         if (status)
6723                 goto out;
6724         status = decode_putfh(xdr);
6725         if (status)
6726                 goto out;
6727         status = decode_secinfo(xdr, res);
6728 out:
6729         return status;
6730 }
6731
6732 #if defined(CONFIG_NFS_V4_1)
6733 /*
6734  * Decode BIND_CONN_TO_SESSION response
6735  */
6736 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6737                                         struct xdr_stream *xdr,
6738                                         void *res)
6739 {
6740         struct compound_hdr hdr;
6741         int status;
6742
6743         status = decode_compound_hdr(xdr, &hdr);
6744         if (!status)
6745                 status = decode_bind_conn_to_session(xdr, res);
6746         return status;
6747 }
6748
6749 /*
6750  * Decode EXCHANGE_ID response
6751  */
6752 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6753                                     struct xdr_stream *xdr,
6754                                     void *res)
6755 {
6756         struct compound_hdr hdr;
6757         int status;
6758
6759         status = decode_compound_hdr(xdr, &hdr);
6760         if (!status)
6761                 status = decode_exchange_id(xdr, res);
6762         return status;
6763 }
6764
6765 /*
6766  * Decode CREATE_SESSION response
6767  */
6768 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6769                                        struct xdr_stream *xdr,
6770                                        struct nfs41_create_session_res *res)
6771 {
6772         struct compound_hdr hdr;
6773         int status;
6774
6775         status = decode_compound_hdr(xdr, &hdr);
6776         if (!status)
6777                 status = decode_create_session(xdr, res);
6778         return status;
6779 }
6780
6781 /*
6782  * Decode DESTROY_SESSION response
6783  */
6784 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6785                                         struct xdr_stream *xdr,
6786                                         void *res)
6787 {
6788         struct compound_hdr hdr;
6789         int status;
6790
6791         status = decode_compound_hdr(xdr, &hdr);
6792         if (!status)
6793                 status = decode_destroy_session(xdr, res);
6794         return status;
6795 }
6796
6797 /*
6798  * Decode DESTROY_CLIENTID response
6799  */
6800 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6801                                         struct xdr_stream *xdr,
6802                                         void *res)
6803 {
6804         struct compound_hdr hdr;
6805         int status;
6806
6807         status = decode_compound_hdr(xdr, &hdr);
6808         if (!status)
6809                 status = decode_destroy_clientid(xdr, res);
6810         return status;
6811 }
6812
6813 /*
6814  * Decode SEQUENCE response
6815  */
6816 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6817                                  struct xdr_stream *xdr,
6818                                  struct nfs4_sequence_res *res)
6819 {
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         if (!status)
6825                 status = decode_sequence(xdr, res, rqstp);
6826         return status;
6827 }
6828
6829 /*
6830  * Decode GET_LEASE_TIME response
6831  */
6832 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6833                                        struct xdr_stream *xdr,
6834                                        struct nfs4_get_lease_time_res *res)
6835 {
6836         struct compound_hdr hdr;
6837         int status;
6838
6839         status = decode_compound_hdr(xdr, &hdr);
6840         if (!status)
6841                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6842         if (!status)
6843                 status = decode_putrootfh(xdr);
6844         if (!status)
6845                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6846         return status;
6847 }
6848
6849 /*
6850  * Decode RECLAIM_COMPLETE response
6851  */
6852 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6853                                          struct xdr_stream *xdr,
6854                                          struct nfs41_reclaim_complete_res *res)
6855 {
6856         struct compound_hdr hdr;
6857         int status;
6858
6859         status = decode_compound_hdr(xdr, &hdr);
6860         if (!status)
6861                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6862         if (!status)
6863                 status = decode_reclaim_complete(xdr, (void *)NULL);
6864         return status;
6865 }
6866
6867 /*
6868  * Decode GETDEVICELIST response
6869  */
6870 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6871                                       struct xdr_stream *xdr,
6872                                       struct nfs4_getdevicelist_res *res)
6873 {
6874         struct compound_hdr hdr;
6875         int status;
6876
6877         dprintk("encoding getdevicelist!\n");
6878
6879         status = decode_compound_hdr(xdr, &hdr);
6880         if (status != 0)
6881                 goto out;
6882         status = decode_sequence(xdr, &res->seq_res, rqstp);
6883         if (status != 0)
6884                 goto out;
6885         status = decode_putfh(xdr);
6886         if (status != 0)
6887                 goto out;
6888         status = decode_getdevicelist(xdr, res->devlist);
6889 out:
6890         return status;
6891 }
6892
6893 /*
6894  * Decode GETDEVINFO response
6895  */
6896 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6897                                       struct xdr_stream *xdr,
6898                                       struct nfs4_getdeviceinfo_res *res)
6899 {
6900         struct compound_hdr hdr;
6901         int status;
6902
6903         status = decode_compound_hdr(xdr, &hdr);
6904         if (status != 0)
6905                 goto out;
6906         status = decode_sequence(xdr, &res->seq_res, rqstp);
6907         if (status != 0)
6908                 goto out;
6909         status = decode_getdeviceinfo(xdr, res->pdev);
6910 out:
6911         return status;
6912 }
6913
6914 /*
6915  * Decode LAYOUTGET response
6916  */
6917 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6918                                   struct xdr_stream *xdr,
6919                                   struct nfs4_layoutget_res *res)
6920 {
6921         struct compound_hdr hdr;
6922         int status;
6923
6924         status = decode_compound_hdr(xdr, &hdr);
6925         if (status)
6926                 goto out;
6927         status = decode_sequence(xdr, &res->seq_res, rqstp);
6928         if (status)
6929                 goto out;
6930         status = decode_putfh(xdr);
6931         if (status)
6932                 goto out;
6933         status = decode_layoutget(xdr, rqstp, res);
6934 out:
6935         return status;
6936 }
6937
6938 /*
6939  * Decode LAYOUTRETURN response
6940  */
6941 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6942                                      struct xdr_stream *xdr,
6943                                      struct nfs4_layoutreturn_res *res)
6944 {
6945         struct compound_hdr hdr;
6946         int status;
6947
6948         status = decode_compound_hdr(xdr, &hdr);
6949         if (status)
6950                 goto out;
6951         status = decode_sequence(xdr, &res->seq_res, rqstp);
6952         if (status)
6953                 goto out;
6954         status = decode_putfh(xdr);
6955         if (status)
6956                 goto out;
6957         status = decode_layoutreturn(xdr, res);
6958 out:
6959         return status;
6960 }
6961
6962 /*
6963  * Decode LAYOUTCOMMIT response
6964  */
6965 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6966                                      struct xdr_stream *xdr,
6967                                      struct nfs4_layoutcommit_res *res)
6968 {
6969         struct compound_hdr hdr;
6970         int status;
6971
6972         status = decode_compound_hdr(xdr, &hdr);
6973         if (status)
6974                 goto out;
6975         status = decode_sequence(xdr, &res->seq_res, rqstp);
6976         if (status)
6977                 goto out;
6978         status = decode_putfh(xdr);
6979         if (status)
6980                 goto out;
6981         status = decode_layoutcommit(xdr, rqstp, res);
6982         if (status)
6983                 goto out;
6984         decode_getfattr(xdr, res->fattr, res->server);
6985 out:
6986         return status;
6987 }
6988
6989 /*
6990  * Decode SECINFO_NO_NAME response
6991  */
6992 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6993                                         struct xdr_stream *xdr,
6994                                         struct nfs4_secinfo_res *res)
6995 {
6996         struct compound_hdr hdr;
6997         int status;
6998
6999         status = decode_compound_hdr(xdr, &hdr);
7000         if (status)
7001                 goto out;
7002         status = decode_sequence(xdr, &res->seq_res, rqstp);
7003         if (status)
7004                 goto out;
7005         status = decode_putrootfh(xdr);
7006         if (status)
7007                 goto out;
7008         status = decode_secinfo_no_name(xdr, res);
7009 out:
7010         return status;
7011 }
7012
7013 /*
7014  * Decode TEST_STATEID response
7015  */
7016 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7017                                      struct xdr_stream *xdr,
7018                                      struct nfs41_test_stateid_res *res)
7019 {
7020         struct compound_hdr hdr;
7021         int status;
7022
7023         status = decode_compound_hdr(xdr, &hdr);
7024         if (status)
7025                 goto out;
7026         status = decode_sequence(xdr, &res->seq_res, rqstp);
7027         if (status)
7028                 goto out;
7029         status = decode_test_stateid(xdr, res);
7030 out:
7031         return status;
7032 }
7033
7034 /*
7035  * Decode FREE_STATEID response
7036  */
7037 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7038                                      struct xdr_stream *xdr,
7039                                      struct nfs41_free_stateid_res *res)
7040 {
7041         struct compound_hdr hdr;
7042         int status;
7043
7044         status = decode_compound_hdr(xdr, &hdr);
7045         if (status)
7046                 goto out;
7047         status = decode_sequence(xdr, &res->seq_res, rqstp);
7048         if (status)
7049                 goto out;
7050         status = decode_free_stateid(xdr, res);
7051 out:
7052         return status;
7053 }
7054 #endif /* CONFIG_NFS_V4_1 */
7055
7056 /**
7057  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7058  *                      the local page cache.
7059  * @xdr: XDR stream where entry resides
7060  * @entry: buffer to fill in with entry data
7061  * @plus: boolean indicating whether this should be a readdirplus entry
7062  *
7063  * Returns zero if successful, otherwise a negative errno value is
7064  * returned.
7065  *
7066  * This function is not invoked during READDIR reply decoding, but
7067  * rather whenever an application invokes the getdents(2) system call
7068  * on a directory already in our cache.
7069  */
7070 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7071                        int plus)
7072 {
7073         unsigned int savep;
7074         uint32_t bitmap[3] = {0};
7075         uint32_t len;
7076         __be32 *p = xdr_inline_decode(xdr, 4);
7077         if (unlikely(!p))
7078                 goto out_overflow;
7079         if (*p == xdr_zero) {
7080                 p = xdr_inline_decode(xdr, 4);
7081                 if (unlikely(!p))
7082                         goto out_overflow;
7083                 if (*p == xdr_zero)
7084                         return -EAGAIN;
7085                 entry->eof = 1;
7086                 return -EBADCOOKIE;
7087         }
7088
7089         p = xdr_inline_decode(xdr, 12);
7090         if (unlikely(!p))
7091                 goto out_overflow;
7092         entry->prev_cookie = entry->cookie;
7093         p = xdr_decode_hyper(p, &entry->cookie);
7094         entry->len = be32_to_cpup(p);
7095
7096         p = xdr_inline_decode(xdr, entry->len);
7097         if (unlikely(!p))
7098                 goto out_overflow;
7099         entry->name = (const char *) p;
7100
7101         /*
7102          * In case the server doesn't return an inode number,
7103          * we fake one here.  (We don't use inode number 0,
7104          * since glibc seems to choke on it...)
7105          */
7106         entry->ino = 1;
7107         entry->fattr->valid = 0;
7108
7109         if (decode_attr_bitmap(xdr, bitmap) < 0)
7110                 goto out_overflow;
7111
7112         if (decode_attr_length(xdr, &len, &savep) < 0)
7113                 goto out_overflow;
7114
7115         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7116                                   NULL, entry->server) < 0)
7117                 goto out_overflow;
7118         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7119                 entry->ino = entry->fattr->mounted_on_fileid;
7120         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7121                 entry->ino = entry->fattr->fileid;
7122
7123         entry->d_type = DT_UNKNOWN;
7124         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7125                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7126
7127         return 0;
7128
7129 out_overflow:
7130         print_overflow_msg(__func__, xdr);
7131         return -EAGAIN;
7132 }
7133
7134 /*
7135  * We need to translate between nfs status return values and
7136  * the local errno values which may not be the same.
7137  */
7138 static struct {
7139         int stat;
7140         int errno;
7141 } nfs_errtbl[] = {
7142         { NFS4_OK,              0               },
7143         { NFS4ERR_PERM,         -EPERM          },
7144         { NFS4ERR_NOENT,        -ENOENT         },
7145         { NFS4ERR_IO,           -errno_NFSERR_IO},
7146         { NFS4ERR_NXIO,         -ENXIO          },
7147         { NFS4ERR_ACCESS,       -EACCES         },
7148         { NFS4ERR_EXIST,        -EEXIST         },
7149         { NFS4ERR_XDEV,         -EXDEV          },
7150         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7151         { NFS4ERR_ISDIR,        -EISDIR         },
7152         { NFS4ERR_INVAL,        -EINVAL         },
7153         { NFS4ERR_FBIG,         -EFBIG          },
7154         { NFS4ERR_NOSPC,        -ENOSPC         },
7155         { NFS4ERR_ROFS,         -EROFS          },
7156         { NFS4ERR_MLINK,        -EMLINK         },
7157         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7158         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7159         { NFS4ERR_DQUOT,        -EDQUOT         },
7160         { NFS4ERR_STALE,        -ESTALE         },
7161         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7162         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7163         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7164         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7165         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7166         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7167         { NFS4ERR_LOCKED,       -EAGAIN         },
7168         { NFS4ERR_SYMLINK,      -ELOOP          },
7169         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7170         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7171         { -1,                   -EIO            }
7172 };
7173
7174 /*
7175  * Convert an NFS error code to a local one.
7176  * This one is used jointly by NFSv2 and NFSv3.
7177  */
7178 static int
7179 nfs4_stat_to_errno(int stat)
7180 {
7181         int i;
7182         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7183                 if (nfs_errtbl[i].stat == stat)
7184                         return nfs_errtbl[i].errno;
7185         }
7186         if (stat <= 10000 || stat > 10100) {
7187                 /* The server is looney tunes. */
7188                 return -EREMOTEIO;
7189         }
7190         /* If we cannot translate the error, the recovery routines should
7191          * handle it.
7192          * Note: remaining NFSv4 error codes have values > 10000, so should
7193          * not conflict with native Linux error codes.
7194          */
7195         return -stat;
7196 }
7197
7198 #define PROC(proc, argtype, restype)                            \
7199 [NFSPROC4_CLNT_##proc] = {                                      \
7200         .p_proc   = NFSPROC4_COMPOUND,                          \
7201         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7202         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7203         .p_arglen = NFS4_##argtype##_sz,                        \
7204         .p_replen = NFS4_##restype##_sz,                        \
7205         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7206         .p_name   = #proc,                                      \
7207 }
7208
7209 struct rpc_procinfo     nfs4_procedures[] = {
7210         PROC(READ,              enc_read,               dec_read),
7211         PROC(WRITE,             enc_write,              dec_write),
7212         PROC(COMMIT,            enc_commit,             dec_commit),
7213         PROC(OPEN,              enc_open,               dec_open),
7214         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7215         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7216         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7217         PROC(CLOSE,             enc_close,              dec_close),
7218         PROC(SETATTR,           enc_setattr,            dec_setattr),
7219         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7220         PROC(RENEW,             enc_renew,              dec_renew),
7221         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7222         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7223         PROC(LOCK,              enc_lock,               dec_lock),
7224         PROC(LOCKT,             enc_lockt,              dec_lockt),
7225         PROC(LOCKU,             enc_locku,              dec_locku),
7226         PROC(ACCESS,            enc_access,             dec_access),
7227         PROC(GETATTR,           enc_getattr,            dec_getattr),
7228         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7229         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7230         PROC(REMOVE,            enc_remove,             dec_remove),
7231         PROC(RENAME,            enc_rename,             dec_rename),
7232         PROC(LINK,              enc_link,               dec_link),
7233         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7234         PROC(CREATE,            enc_create,             dec_create),
7235         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7236         PROC(STATFS,            enc_statfs,             dec_statfs),
7237         PROC(READLINK,          enc_readlink,           dec_readlink),
7238         PROC(READDIR,           enc_readdir,            dec_readdir),
7239         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7240         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7241         PROC(GETACL,            enc_getacl,             dec_getacl),
7242         PROC(SETACL,            enc_setacl,             dec_setacl),
7243         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7244         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7245         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7246 #if defined(CONFIG_NFS_V4_1)
7247         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7248         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7249         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7250         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7251         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7252         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7253         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7254         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7255         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7256         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7257         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7258         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7259         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7260         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7261         PROC(BIND_CONN_TO_SESSION,
7262                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7263         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7264 #endif /* CONFIG_NFS_V4_1 */
7265 };
7266
7267 const struct rpc_version nfs_version4 = {
7268         .number                 = 4,
7269         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7270         .procs                  = nfs4_procedures
7271 };
7272
7273 /*
7274  * Local variables:
7275  *  c-basic-offset: 8
7276  * End:
7277  */