Pileus Git - ~andy/linux/blob - 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                                 encode_putrootfh_maxsz + \
 535                                 encode_fsinfo_maxsz)
 536 #define NFS4_dec_setclientid_confirm_sz \
 537                                 (compound_decode_hdr_maxsz + \
 538                                 decode_setclientid_confirm_maxsz + \
 539                                 decode_putrootfh_maxsz + \
 540                                 decode_fsinfo_maxsz)
 541 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 542                                 encode_sequence_maxsz + \
 543                                 encode_putfh_maxsz + \
 544                                 encode_lock_maxsz)
 545 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 546                                 decode_sequence_maxsz + \
 547                                 decode_putfh_maxsz + \
 548                                 decode_lock_maxsz)
 549 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 550                                 encode_sequence_maxsz + \
 551                                 encode_putfh_maxsz + \
 552                                 encode_lockt_maxsz)
 553 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 554                                  decode_sequence_maxsz + \
 555                                  decode_putfh_maxsz + \
 556                                  decode_lockt_maxsz)
 557 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_locku_maxsz)
 561 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_locku_maxsz)
 565 #define NFS4_enc_release_lockowner_sz \
 566                                 (compound_encode_hdr_maxsz + \
 567                                  encode_lockowner_maxsz)
 568 #define NFS4_dec_release_lockowner_sz \
 569                                 (compound_decode_hdr_maxsz + \
 570                                  decode_lockowner_maxsz)
 571 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_access_maxsz + \
 575                                 encode_getattr_maxsz)
 576 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 577                                 decode_sequence_maxsz + \
 578                                 decode_putfh_maxsz + \
 579                                 decode_access_maxsz + \
 580                                 decode_getattr_maxsz)
 581 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_getattr_maxsz)
 585 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 586                                 decode_sequence_maxsz + \
 587                                 decode_putfh_maxsz + \
 588                                 decode_getattr_maxsz)
 589 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_lookup_maxsz + \
 593                                 encode_getattr_maxsz + \
 594                                 encode_getfh_maxsz)
 595 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_lookup_maxsz + \
 599                                 decode_getattr_maxsz + \
 600                                 decode_getfh_maxsz)
 601 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 602                                 encode_sequence_maxsz + \
 603                                 encode_putrootfh_maxsz + \
 604                                 encode_getattr_maxsz + \
 605                                 encode_getfh_maxsz)
 606 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 607                                 decode_sequence_maxsz + \
 608                                 decode_putrootfh_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_getfh_maxsz)
 611 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putfh_maxsz + \
 614                                 encode_remove_maxsz)
 615 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 616                                 decode_sequence_maxsz + \
 617                                 decode_putfh_maxsz + \
 618                                 decode_remove_maxsz)
 619 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_savefh_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_rename_maxsz)
 625 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_savefh_maxsz + \
 629                                 decode_putfh_maxsz + \
 630                                 decode_rename_maxsz)
 631 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_savefh_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_link_maxsz + \
 637                                 encode_restorefh_maxsz + \
 638                                 encode_getattr_maxsz)
 639 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 640                                 decode_sequence_maxsz + \
 641                                 decode_putfh_maxsz + \
 642                                 decode_savefh_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_link_maxsz + \
 645                                 decode_restorefh_maxsz + \
 646                                 decode_getattr_maxsz)
 647 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 648                                 encode_sequence_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_symlink_maxsz + \
 651                                 encode_getattr_maxsz + \
 652                                 encode_getfh_maxsz)
 653 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_symlink_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_getfh_maxsz)
 659 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_create_maxsz + \
 663                                 encode_getfh_maxsz + \
 664                                 encode_getattr_maxsz)
 665 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_create_maxsz + \
 669                                 decode_getfh_maxsz + \
 670                                 decode_getattr_maxsz)
 671 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_getattr_maxsz)
 679 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_statfs_maxsz)
 683 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_statfs_maxsz)
 687 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 688                                 encode_sequence_maxsz + \
 689                                 encode_putfh_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_delegreturn_maxsz + \
 699                                 encode_getattr_maxsz)
 700 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 701                                 decode_sequence_maxsz + \
 702                                 decode_delegreturn_maxsz + \
 703                                 decode_getattr_maxsz)
 704 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 705                                 encode_sequence_maxsz + \
 706                                 encode_putfh_maxsz + \
 707                                 encode_getacl_maxsz)
 708 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 709                                 decode_sequence_maxsz + \
 710                                 decode_putfh_maxsz + \
 711                                 decode_getacl_maxsz)
 712 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 713                                 encode_sequence_maxsz + \
 714                                 encode_putfh_maxsz + \
 715                                 encode_setacl_maxsz)
 716 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 717                                 decode_sequence_maxsz + \
 718                                 decode_putfh_maxsz + \
 719                                 decode_setacl_maxsz)
 720 #define NFS4_enc_fs_locations_sz \
 721                                 (compound_encode_hdr_maxsz + \
 722                                  encode_sequence_maxsz + \
 723                                  encode_putfh_maxsz + \
 724                                  encode_lookup_maxsz + \
 725                                  encode_fs_locations_maxsz)
 726 #define NFS4_dec_fs_locations_sz \
 727                                 (compound_decode_hdr_maxsz + \
 728                                  decode_sequence_maxsz + \
 729                                  decode_putfh_maxsz + \
 730                                  decode_lookup_maxsz + \
 731                                  decode_fs_locations_maxsz)
 732 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 733                                 encode_sequence_maxsz + \
 734                                 encode_putfh_maxsz + \
 735                                 encode_secinfo_maxsz)
 736 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 737                                 decode_sequence_maxsz + \
 738                                 decode_putfh_maxsz + \
 739                                 decode_secinfo_maxsz)
 740 #if defined(CONFIG_NFS_V4_1)
 741 #define NFS4_enc_bind_conn_to_session_sz \
 742                                 (compound_encode_hdr_maxsz + \
 743                                  encode_bind_conn_to_session_maxsz)
 744 #define NFS4_dec_bind_conn_to_session_sz \
 745                                 (compound_decode_hdr_maxsz + \
 746                                  decode_bind_conn_to_session_maxsz)
 747 #define NFS4_enc_exchange_id_sz \
 748                                 (compound_encode_hdr_maxsz + \
 749                                  encode_exchange_id_maxsz)
 750 #define NFS4_dec_exchange_id_sz \
 751                                 (compound_decode_hdr_maxsz + \
 752                                  decode_exchange_id_maxsz)
 753 #define NFS4_enc_create_session_sz \
 754                                 (compound_encode_hdr_maxsz + \
 755                                  encode_create_session_maxsz)
 756 #define NFS4_dec_create_session_sz \
 757                                 (compound_decode_hdr_maxsz + \
 758                                  decode_create_session_maxsz)
 759 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 760                                          encode_destroy_session_maxsz)
 761 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 762                                          decode_destroy_session_maxsz)
 763 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 764                                          encode_destroy_clientid_maxsz)
 765 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 766                                          decode_destroy_clientid_maxsz)
 767 #define NFS4_enc_sequence_sz \
 768                                 (compound_decode_hdr_maxsz + \
 769                                  encode_sequence_maxsz)
 770 #define NFS4_dec_sequence_sz \
 771                                 (compound_decode_hdr_maxsz + \
 772                                  decode_sequence_maxsz)
 773 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 774                                          encode_sequence_maxsz + \
 775                                          encode_putrootfh_maxsz + \
 776                                          encode_fsinfo_maxsz)
 777 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 778                                          decode_sequence_maxsz + \
 779                                          decode_putrootfh_maxsz + \
 780                                          decode_fsinfo_maxsz)
 781 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 782                                          encode_sequence_maxsz + \
 783                                          encode_reclaim_complete_maxsz)
 784 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 785                                          decode_sequence_maxsz + \
 786                                          decode_reclaim_complete_maxsz)
 787 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 788                                 encode_sequence_maxsz + \
 789                                 encode_putfh_maxsz + \
 790                                 encode_getdevicelist_maxsz)
 791 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 792                                 decode_sequence_maxsz + \
 793                                 decode_putfh_maxsz + \
 794                                 decode_getdevicelist_maxsz)
 795 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 796                                 encode_sequence_maxsz +\
 797                                 encode_getdeviceinfo_maxsz)
 798 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 799                                 decode_sequence_maxsz + \
 800                                 decode_getdeviceinfo_maxsz)
 801 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 802                                 encode_sequence_maxsz + \
 803                                 encode_putfh_maxsz +        \
 804                                 encode_layoutget_maxsz)
 805 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 806                                 decode_sequence_maxsz + \
 807                                 decode_putfh_maxsz +        \
 808                                 decode_layoutget_maxsz)
 809 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 810                                 encode_sequence_maxsz +\
 811                                 encode_putfh_maxsz + \
 812                                 encode_layoutcommit_maxsz + \
 813                                 encode_getattr_maxsz)
 814 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 815                                 decode_sequence_maxsz + \
 816                                 decode_putfh_maxsz + \
 817                                 decode_layoutcommit_maxsz + \
 818                                 decode_getattr_maxsz)
 819 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 820                                 encode_sequence_maxsz + \
 821                                 encode_putfh_maxsz + \
 822                                 encode_layoutreturn_maxsz)
 823 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 824                                 decode_sequence_maxsz + \
 825                                 decode_putfh_maxsz + \
 826                                 decode_layoutreturn_maxsz)
 827 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 828                                         encode_sequence_maxsz + \
 829                                         encode_putrootfh_maxsz +\
 830                                         encode_secinfo_no_name_maxsz)
 831 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 832                                         decode_sequence_maxsz + \
 833                                         decode_putrootfh_maxsz + \
 834                                         decode_secinfo_no_name_maxsz)
 835 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 836                                          encode_sequence_maxsz + \
 837                                          encode_test_stateid_maxsz)
 838 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 839                                          decode_sequence_maxsz + \
 840                                          decode_test_stateid_maxsz)
 841 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 842                                          encode_sequence_maxsz + \
 843                                          encode_free_stateid_maxsz)
 844 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 845                                          decode_sequence_maxsz + \
 846                                          decode_free_stateid_maxsz)
 847
 848 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 849                                       compound_encode_hdr_maxsz +
 850                                       encode_sequence_maxsz +
 851                                       encode_putfh_maxsz +
 852                                       encode_getattr_maxsz) *
 853                                      XDR_UNIT);
 854
 855 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 856                                      compound_decode_hdr_maxsz +
 857                                      decode_sequence_maxsz +
 858                                      decode_putfh_maxsz) *
 859                                     XDR_UNIT);
 860 #endif /* CONFIG_NFS_V4_1 */
 861
 862 static const umode_t nfs_type2fmt[] = {
 863         [NF4BAD] = 0,
 864         [NF4REG] = S_IFREG,
 865         [NF4DIR] = S_IFDIR,
 866         [NF4BLK] = S_IFBLK,
 867         [NF4CHR] = S_IFCHR,
 868         [NF4LNK] = S_IFLNK,
 869         [NF4SOCK] = S_IFSOCK,
 870         [NF4FIFO] = S_IFIFO,
 871         [NF4ATTRDIR] = 0,
 872         [NF4NAMEDATTR] = 0,
 873 };
 874
 875 struct compound_hdr {
 876         int32_t         status;
 877         uint32_t        nops;
 878         __be32 *        nops_p;
 879         uint32_t        taglen;
 880         char *          tag;
 881         uint32_t        replen;         /* expected reply words */
 882         u32             minorversion;
 883 };
 884
 885 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 886 {
 887         __be32 *p = xdr_reserve_space(xdr, nbytes);
 888         BUG_ON(!p);
 889         return p;
 890 }
 891
 892 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 893 {
 894         __be32 *p;
 895
 896         p = xdr_reserve_space(xdr, len);
 897         xdr_encode_opaque_fixed(p, buf, len);
 898 }
 899
 900 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 901 {
 902         __be32 *p;
 903
 904         p = reserve_space(xdr, 4 + len);
 905         xdr_encode_opaque(p, str, len);
 906 }
 907
 908 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 909 {
 910         __be32 *p;
 911
 912         p = reserve_space(xdr, 4);
 913         *p = cpu_to_be32(n);
 914 }
 915
 916 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 917 {
 918         __be32 *p;
 919
 920         p = reserve_space(xdr, 8);
 921         xdr_encode_hyper(p, n);
 922 }
 923
 924 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 925                 const struct nfs_seqid *seqid)
 926 {
 927         encode_uint32(xdr, seqid->sequence->counter);
 928 }
 929
 930 static void encode_compound_hdr(struct xdr_stream *xdr,
 931                                 struct rpc_rqst *req,
 932                                 struct compound_hdr *hdr)
 933 {
 934         __be32 *p;
 935         struct rpc_auth *auth = req->rq_cred->cr_auth;
 936
 937         /* initialize running count of expected bytes in reply.
 938          * NOTE: the replied tag SHOULD be the same is the one sent,
 939          * but this is not required as a MUST for the server to do so. */
 940         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 941
 942         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 943         encode_string(xdr, hdr->taglen, hdr->tag);
 944         p = reserve_space(xdr, 8);
 945         *p++ = cpu_to_be32(hdr->minorversion);
 946         hdr->nops_p = p;
 947         *p = cpu_to_be32(hdr->nops);
 948 }
 949
 950 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 951                 uint32_t replen,
 952                 struct compound_hdr *hdr)
 953 {
 954         encode_uint32(xdr, op);
 955         hdr->nops++;
 956         hdr->replen += replen;
 957 }
 958
 959 static void encode_nops(struct compound_hdr *hdr)
 960 {
 961         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 962         *hdr->nops_p = htonl(hdr->nops);
 963 }
 964
 965 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 966 {
 967         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 968 }
 969
 970 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 971 {
 972         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 973 }
 974
 975 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 976 {
 977         char owner_name[IDMAP_NAMESZ];
 978         char owner_group[IDMAP_NAMESZ];
 979         int owner_namelen = 0;
 980         int owner_grouplen = 0;
 981         __be32 *p;
 982         __be32 *q;
 983         int len;
 984         uint32_t bmval0 = 0;
 985         uint32_t bmval1 = 0;
 986
 987         /*
 988          * We reserve enough space to write the entire attribute buffer at once.
 989          * In the worst-case, this would be
 990          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 991          *          = 36 bytes, plus any contribution from variable-length fields
 992          *            such as owner/group.
 993          */
 994         len = 16;
 995
 996         /* Sigh */
 997         if (iap->ia_valid & ATTR_SIZE)
 998                 len += 8;
 999         if (iap->ia_valid & ATTR_MODE)
1000                 len += 4;
1001         if (iap->ia_valid & ATTR_UID) {
1002                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1003                 if (owner_namelen < 0) {
1004                         dprintk("nfs: couldn't resolve uid %d to string\n",
1005                                         from_kuid(&init_user_ns, iap->ia_uid));
1006                         /* XXX */
1007                         strcpy(owner_name, "nobody");
1008                         owner_namelen = sizeof("nobody") - 1;
1009                         /* goto out; */
1010                 }
1011                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1012         }
1013         if (iap->ia_valid & ATTR_GID) {
1014                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1015                 if (owner_grouplen < 0) {
1016                         dprintk("nfs: couldn't resolve gid %d to string\n",
1017                                         from_kgid(&init_user_ns, iap->ia_gid));
1018                         strcpy(owner_group, "nobody");
1019                         owner_grouplen = sizeof("nobody") - 1;
1020                         /* goto out; */
1021                 }
1022                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1023         }
1024         if (iap->ia_valid & ATTR_ATIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_ATIME)
1027                 len += 4;
1028         if (iap->ia_valid & ATTR_MTIME_SET)
1029                 len += 16;
1030         else if (iap->ia_valid & ATTR_MTIME)
1031                 len += 4;
1032         p = reserve_space(xdr, len);
1033
1034         /*
1035          * We write the bitmap length now, but leave the bitmap and the attribute
1036          * buffer length to be backfilled at the end of this routine.
1037          */
1038         *p++ = cpu_to_be32(2);
1039         q = p;
1040         p += 3;
1041
1042         if (iap->ia_valid & ATTR_SIZE) {
1043                 bmval0 |= FATTR4_WORD0_SIZE;
1044                 p = xdr_encode_hyper(p, iap->ia_size);
1045         }
1046         if (iap->ia_valid & ATTR_MODE) {
1047                 bmval1 |= FATTR4_WORD1_MODE;
1048                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1049         }
1050         if (iap->ia_valid & ATTR_UID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER;
1052                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1053         }
1054         if (iap->ia_valid & ATTR_GID) {
1055                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1056                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1057         }
1058         if (iap->ia_valid & ATTR_ATIME_SET) {
1059                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1061                 *p++ = cpu_to_be32(0);
1062                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1063                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1064         }
1065         else if (iap->ia_valid & ATTR_ATIME) {
1066                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1068         }
1069         if (iap->ia_valid & ATTR_MTIME_SET) {
1070                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1072                 *p++ = cpu_to_be32(0);
1073                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1074                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1075         }
1076         else if (iap->ia_valid & ATTR_MTIME) {
1077                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1079         }
1080
1081         /*
1082          * Now we backfill the bitmap and the attribute buffer length.
1083          */
1084         if (len != ((char *)p - (char *)q) + 4) {
1085                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1086                                 len, ((char *)p - (char *)q) + 4);
1087                 BUG();
1088         }
1089         len = (char *)p - (char *)q - 12;
1090         *q++ = htonl(bmval0);
1091         *q++ = htonl(bmval1);
1092         *q = htonl(len);
1093
1094 /* out: */
1095 }
1096
1097 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1098 {
1099         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1100         encode_uint32(xdr, access);
1101 }
1102
1103 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1104 {
1105         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1106         encode_nfs4_seqid(xdr, arg->seqid);
1107         encode_nfs4_stateid(xdr, arg->stateid);
1108 }
1109
1110 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1111 {
1112         __be32 *p;
1113
1114         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1115         p = reserve_space(xdr, 12);
1116         p = xdr_encode_hyper(p, args->offset);
1117         *p = cpu_to_be32(args->count);
1118 }
1119
1120 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1121 {
1122         __be32 *p;
1123
1124         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1125         encode_uint32(xdr, create->ftype);
1126
1127         switch (create->ftype) {
1128         case NF4LNK:
1129                 p = reserve_space(xdr, 4);
1130                 *p = cpu_to_be32(create->u.symlink.len);
1131                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1132                 break;
1133
1134         case NF4BLK: case NF4CHR:
1135                 p = reserve_space(xdr, 8);
1136                 *p++ = cpu_to_be32(create->u.device.specdata1);
1137                 *p = cpu_to_be32(create->u.device.specdata2);
1138                 break;
1139
1140         default:
1141                 break;
1142         }
1143
1144         encode_string(xdr, create->name->len, create->name->name);
1145         encode_attrs(xdr, create->attrs, create->server);
1146 }
1147
1148 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1153         p = reserve_space(xdr, 8);
1154         *p++ = cpu_to_be32(1);
1155         *p = cpu_to_be32(bitmap);
1156 }
1157
1158 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1163         p = reserve_space(xdr, 12);
1164         *p++ = cpu_to_be32(2);
1165         *p++ = cpu_to_be32(bm0);
1166         *p = cpu_to_be32(bm1);
1167 }
1168
1169 static void
1170 encode_getattr_three(struct xdr_stream *xdr,
1171                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1172                      struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175
1176         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177         if (bm2) {
1178                 p = reserve_space(xdr, 16);
1179                 *p++ = cpu_to_be32(3);
1180                 *p++ = cpu_to_be32(bm0);
1181                 *p++ = cpu_to_be32(bm1);
1182                 *p = cpu_to_be32(bm2);
1183         } else if (bm1) {
1184                 p = reserve_space(xdr, 12);
1185                 *p++ = cpu_to_be32(2);
1186                 *p++ = cpu_to_be32(bm0);
1187                 *p = cpu_to_be32(bm1);
1188         } else {
1189                 p = reserve_space(xdr, 8);
1190                 *p++ = cpu_to_be32(1);
1191                 *p = cpu_to_be32(bm0);
1192         }
1193 }
1194
1195 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1196 {
1197         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1198                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1199 }
1200
1201 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1202                                  const u32 *open_bitmap,
1203                                  struct compound_hdr *hdr)
1204 {
1205         encode_getattr_three(xdr,
1206                              bitmask[0] & open_bitmap[0],
1207                              bitmask[1] & open_bitmap[1],
1208                              bitmask[2] & open_bitmap[2],
1209                              hdr);
1210 }
1211
1212 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1213 {
1214         encode_getattr_three(xdr,
1215                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1216                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1217                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1218                              hdr);
1219 }
1220
1221 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1222 {
1223         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1224                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1225 }
1226
1227 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1228 {
1229         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1230 }
1231
1232 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1233 {
1234         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1235         encode_string(xdr, name->len, name->name);
1236 }
1237
1238 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1239 {
1240         if (fl->fl_type == F_RDLCK)
1241                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1242         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1243 }
1244
1245 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1246 {
1247         if (fl->fl_end == OFFSET_MAX)
1248                 return ~(uint64_t)0;
1249         return fl->fl_end - fl->fl_start + 1;
1250 }
1251
1252 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1253 {
1254         __be32 *p;
1255
1256         p = reserve_space(xdr, 32);
1257         p = xdr_encode_hyper(p, lowner->clientid);
1258         *p++ = cpu_to_be32(20);
1259         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1260         *p++ = cpu_to_be32(lowner->s_dev);
1261         xdr_encode_hyper(p, lowner->id);
1262 }
1263
1264 /*
1265  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1266  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1267  */
1268 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1269 {
1270         __be32 *p;
1271
1272         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1273         p = reserve_space(xdr, 28);
1274         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1275         *p++ = cpu_to_be32(args->reclaim);
1276         p = xdr_encode_hyper(p, args->fl->fl_start);
1277         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1278         *p = cpu_to_be32(args->new_lock_owner);
1279         if (args->new_lock_owner){
1280                 encode_nfs4_seqid(xdr, args->open_seqid);
1281                 encode_nfs4_stateid(xdr, args->open_stateid);
1282                 encode_nfs4_seqid(xdr, args->lock_seqid);
1283                 encode_lockowner(xdr, &args->lock_owner);
1284         }
1285         else {
1286                 encode_nfs4_stateid(xdr, args->lock_stateid);
1287                 encode_nfs4_seqid(xdr, args->lock_seqid);
1288         }
1289 }
1290
1291 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1292 {
1293         __be32 *p;
1294
1295         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1296         p = reserve_space(xdr, 20);
1297         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1298         p = xdr_encode_hyper(p, args->fl->fl_start);
1299         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1300         encode_lockowner(xdr, &args->lock_owner);
1301 }
1302
1303 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1308         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1309         encode_nfs4_seqid(xdr, args->seqid);
1310         encode_nfs4_stateid(xdr, args->stateid);
1311         p = reserve_space(xdr, 16);
1312         p = xdr_encode_hyper(p, args->fl->fl_start);
1313         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1314 }
1315
1316 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1317 {
1318         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1319         encode_lockowner(xdr, lowner);
1320 }
1321
1322 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1323 {
1324         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1325         encode_string(xdr, name->len, name->name);
1326 }
1327
1328 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1329 {
1330         __be32 *p;
1331
1332         p = reserve_space(xdr, 8);
1333         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1334         case FMODE_READ:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1336                 break;
1337         case FMODE_WRITE:
1338                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1339                 break;
1340         case FMODE_READ|FMODE_WRITE:
1341                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1342                 break;
1343         default:
1344                 *p++ = cpu_to_be32(0);
1345         }
1346         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1347 }
1348
1349 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1350 {
1351         __be32 *p;
1352  /*
1353  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1354  * owner 4 = 32
1355  */
1356         encode_nfs4_seqid(xdr, arg->seqid);
1357         encode_share_access(xdr, arg->fmode);
1358         p = reserve_space(xdr, 36);
1359         p = xdr_encode_hyper(p, arg->clientid);
1360         *p++ = cpu_to_be32(24);
1361         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1362         *p++ = cpu_to_be32(arg->server->s_dev);
1363         *p++ = cpu_to_be32(arg->id.uniquifier);
1364         xdr_encode_hyper(p, arg->id.create_time);
1365 }
1366
1367 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1368 {
1369         __be32 *p;
1370         struct nfs_client *clp;
1371
1372         p = reserve_space(xdr, 4);
1373         switch(arg->open_flags & O_EXCL) {
1374         case 0:
1375                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1376                 encode_attrs(xdr, arg->u.attrs, arg->server);
1377                 break;
1378         default:
1379                 clp = arg->server->nfs_client;
1380                 if (clp->cl_mvops->minor_version > 0) {
1381                         if (nfs4_has_persistent_session(clp)) {
1382                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1383                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1384                         } else {
1385                                 struct iattr dummy;
1386
1387                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1388                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1389                                 dummy.ia_valid = 0;
1390                                 encode_attrs(xdr, &dummy, arg->server);
1391                         }
1392                 } else {
1393                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1394                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1395                 }
1396         }
1397 }
1398
1399 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         __be32 *p;
1402
1403         p = reserve_space(xdr, 4);
1404         switch (arg->open_flags & O_CREAT) {
1405         case 0:
1406                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1407                 break;
1408         default:
1409                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410                 encode_createmode(xdr, arg);
1411         }
1412 }
1413
1414 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch (delegation_type) {
1420         case 0:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422                 break;
1423         case FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425                 break;
1426         case FMODE_WRITE|FMODE_READ:
1427                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428                 break;
1429         default:
1430                 BUG();
1431         }
1432 }
1433
1434 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435 {
1436         __be32 *p;
1437
1438         p = reserve_space(xdr, 4);
1439         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440         encode_string(xdr, name->len, name->name);
1441 }
1442
1443 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449         encode_delegation_type(xdr, type);
1450 }
1451
1452 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458         encode_nfs4_stateid(xdr, stateid);
1459         encode_string(xdr, name->len, name->name);
1460 }
1461
1462 static inline void encode_claim_fh(struct xdr_stream *xdr)
1463 {
1464         __be32 *p;
1465
1466         p = reserve_space(xdr, 4);
1467         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1468 }
1469
1470 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1476         encode_nfs4_stateid(xdr, stateid);
1477 }
1478
1479 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1480 {
1481         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1482         encode_openhdr(xdr, arg);
1483         encode_opentype(xdr, arg);
1484         switch (arg->claim) {
1485         case NFS4_OPEN_CLAIM_NULL:
1486                 encode_claim_null(xdr, arg->name);
1487                 break;
1488         case NFS4_OPEN_CLAIM_PREVIOUS:
1489                 encode_claim_previous(xdr, arg->u.delegation_type);
1490                 break;
1491         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1492                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1493                 break;
1494         case NFS4_OPEN_CLAIM_FH:
1495                 encode_claim_fh(xdr);
1496                 break;
1497         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1498                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1499                 break;
1500         default:
1501                 BUG();
1502         }
1503 }
1504
1505 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1506 {
1507         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1508         encode_nfs4_stateid(xdr, arg->stateid);
1509         encode_nfs4_seqid(xdr, arg->seqid);
1510 }
1511
1512 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1513 {
1514         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1515         encode_nfs4_stateid(xdr, arg->stateid);
1516         encode_nfs4_seqid(xdr, arg->seqid);
1517         encode_share_access(xdr, arg->fmode);
1518 }
1519
1520 static void
1521 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1522 {
1523         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1524         encode_string(xdr, fh->size, fh->data);
1525 }
1526
1527 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1528 {
1529         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1530 }
1531
1532 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1533 {
1534         __be32 *p;
1535
1536         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1537         encode_nfs4_stateid(xdr, &args->stateid);
1538
1539         p = reserve_space(xdr, 12);
1540         p = xdr_encode_hyper(p, args->offset);
1541         *p = cpu_to_be32(args->count);
1542 }
1543
1544 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1545 {
1546         uint32_t attrs[2] = {
1547                 FATTR4_WORD0_RDATTR_ERROR,
1548                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1549         };
1550         uint32_t dircount = readdir->count >> 1;
1551         __be32 *p, verf[2];
1552
1553         if (readdir->plus) {
1554                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1555                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1556                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1557                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1558                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1559                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1560                 dircount >>= 1;
1561         }
1562         /* Use mounted_on_fileid only if the server supports it */
1563         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1564                 attrs[0] |= FATTR4_WORD0_FILEID;
1565
1566         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1567         encode_uint64(xdr, readdir->cookie);
1568         encode_nfs4_verifier(xdr, &readdir->verifier);
1569         p = reserve_space(xdr, 20);
1570         *p++ = cpu_to_be32(dircount);
1571         *p++ = cpu_to_be32(readdir->count);
1572         *p++ = cpu_to_be32(2);
1573
1574         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1575         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1576         memcpy(verf, readdir->verifier.data, sizeof(verf));
1577         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1578                         __func__,
1579                         (unsigned long long)readdir->cookie,
1580                         verf[0], verf[1],
1581                         attrs[0] & readdir->bitmask[0],
1582                         attrs[1] & readdir->bitmask[1]);
1583 }
1584
1585 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1588 }
1589
1590 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1591 {
1592         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1593         encode_string(xdr, name->len, name->name);
1594 }
1595
1596 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1597 {
1598         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1599         encode_string(xdr, oldname->len, oldname->name);
1600         encode_string(xdr, newname->len, newname->name);
1601 }
1602
1603 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1604                          struct compound_hdr *hdr)
1605 {
1606         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1607         encode_uint64(xdr, clid);
1608 }
1609
1610 static void
1611 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1612 {
1613         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1614 }
1615
1616 static void
1617 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1618 {
1619         __be32 *p;
1620
1621         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1622         encode_nfs4_stateid(xdr, &zero_stateid);
1623         p = reserve_space(xdr, 2*4);
1624         *p++ = cpu_to_be32(1);
1625         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1626         p = reserve_space(xdr, 4);
1627         *p = cpu_to_be32(arg->acl_len);
1628         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1629 }
1630
1631 static void
1632 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1633 {
1634         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1635 }
1636
1637 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1638 {
1639         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1640         encode_nfs4_stateid(xdr, &arg->stateid);
1641         encode_attrs(xdr, arg->iap, server);
1642 }
1643
1644 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1645 {
1646         __be32 *p;
1647
1648         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1649         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1650
1651         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_prog);
1654         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1655         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1656         p = reserve_space(xdr, 4);
1657         *p = cpu_to_be32(setclientid->sc_cb_ident);
1658 }
1659
1660 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1663                         decode_setclientid_confirm_maxsz, hdr);
1664         encode_uint64(xdr, arg->clientid);
1665         encode_nfs4_verifier(xdr, &arg->confirm);
1666 }
1667
1668 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1669 {
1670         __be32 *p;
1671
1672         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1673         encode_nfs4_stateid(xdr, &args->stateid);
1674
1675         p = reserve_space(xdr, 16);
1676         p = xdr_encode_hyper(p, args->offset);
1677         *p++ = cpu_to_be32(args->stable);
1678         *p = cpu_to_be32(args->count);
1679
1680         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1681 }
1682
1683 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1684 {
1685         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1686         encode_nfs4_stateid(xdr, stateid);
1687 }
1688
1689 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1690 {
1691         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1692         encode_string(xdr, name->len, name->name);
1693 }
1694
1695 #if defined(CONFIG_NFS_V4_1)
1696 /* NFSv4.1 operations */
1697 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1698                                    struct nfs4_session *session,
1699                                    struct compound_hdr *hdr)
1700 {
1701         __be32 *p;
1702
1703         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1704                 decode_bind_conn_to_session_maxsz, hdr);
1705         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1706         p = xdr_reserve_space(xdr, 8);
1707         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1708         *p = 0; /* use_conn_in_rdma_mode = False */
1709 }
1710
1711 static void encode_exchange_id(struct xdr_stream *xdr,
1712                                struct nfs41_exchange_id_args *args,
1713                                struct compound_hdr *hdr)
1714 {
1715         __be32 *p;
1716         char impl_name[IMPL_NAME_LIMIT];
1717         int len = 0;
1718
1719         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1720         encode_nfs4_verifier(xdr, args->verifier);
1721
1722         encode_string(xdr, args->id_len, args->id);
1723
1724         p = reserve_space(xdr, 12);
1725         *p++ = cpu_to_be32(args->flags);
1726         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1727
1728         if (send_implementation_id &&
1729             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1730             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1731                 <= sizeof(impl_name) + 1)
1732                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1733                                utsname()->sysname, utsname()->release,
1734                                utsname()->version, utsname()->machine);
1735
1736         if (len > 0) {
1737                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1738
1739                 encode_string(xdr,
1740                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1741                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1742                 encode_string(xdr, len, impl_name);
1743                 /* just send zeros for nii_date - the date is in nii_name */
1744                 p = reserve_space(xdr, 12);
1745                 p = xdr_encode_hyper(p, 0);
1746                 *p = cpu_to_be32(0);
1747         } else
1748                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1749 }
1750
1751 static void encode_create_session(struct xdr_stream *xdr,
1752                                   struct nfs41_create_session_args *args,
1753                                   struct compound_hdr *hdr)
1754 {
1755         __be32 *p;
1756         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1757         uint32_t len;
1758         struct nfs_client *clp = args->client;
1759         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1760         u32 max_resp_sz_cached;
1761
1762         /*
1763          * Assumes OPEN is the biggest non-idempotent compound.
1764          * 2 is the verifier.
1765          */
1766         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1767                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1768
1769         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1770                         clp->cl_ipaddr);
1771
1772         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1773         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1774         p = xdr_encode_hyper(p, clp->cl_clientid);
1775         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1776         *p++ = cpu_to_be32(args->flags);                        /*flags */
1777
1778         /* Fore Channel */
1779         *p++ = cpu_to_be32(0);                          /* header padding size */
1780         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1782         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1783         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1784         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1785         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1786
1787         /* Back Channel */
1788         *p++ = cpu_to_be32(0);                          /* header padding size */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1791         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1792         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1793         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1794         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1795
1796         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1797         *p++ = cpu_to_be32(1);
1798         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1799
1800         /* authsys_parms rfc1831 */
1801         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1802         p = xdr_encode_opaque(p, machine_name, len);
1803         *p++ = cpu_to_be32(0);                          /* UID */
1804         *p++ = cpu_to_be32(0);                          /* GID */
1805         *p = cpu_to_be32(0);                            /* No more gids */
1806 }
1807
1808 static void encode_destroy_session(struct xdr_stream *xdr,
1809                                    struct nfs4_session *session,
1810                                    struct compound_hdr *hdr)
1811 {
1812         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1813         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1814 }
1815
1816 static void encode_destroy_clientid(struct xdr_stream *xdr,
1817                                    uint64_t clientid,
1818                                    struct compound_hdr *hdr)
1819 {
1820         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1821         encode_uint64(xdr, clientid);
1822 }
1823
1824 static void encode_reclaim_complete(struct xdr_stream *xdr,
1825                                     struct nfs41_reclaim_complete_args *args,
1826                                     struct compound_hdr *hdr)
1827 {
1828         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1829         encode_uint32(xdr, args->one_fs);
1830 }
1831 #endif /* CONFIG_NFS_V4_1 */
1832
1833 static void encode_sequence(struct xdr_stream *xdr,
1834                             const struct nfs4_sequence_args *args,
1835                             struct compound_hdr *hdr)
1836 {
1837 #if defined(CONFIG_NFS_V4_1)
1838         struct nfs4_session *session;
1839         struct nfs4_slot_table *tp;
1840         struct nfs4_slot *slot = args->sa_slot;
1841         __be32 *p;
1842
1843         if (slot == NULL)
1844                 return;
1845
1846         tp = slot->table;
1847         session = tp->session;
1848
1849         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1850
1851         /*
1852          * Sessionid + seqid + slotid + max slotid + cache_this
1853          */
1854         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1855                 "max_slotid=%d cache_this=%d\n",
1856                 __func__,
1857                 ((u32 *)session->sess_id.data)[0],
1858                 ((u32 *)session->sess_id.data)[1],
1859                 ((u32 *)session->sess_id.data)[2],
1860                 ((u32 *)session->sess_id.data)[3],
1861                 slot->seq_nr, slot->slot_nr,
1862                 tp->highest_used_slotid, args->sa_cache_this);
1863         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1864         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865         *p++ = cpu_to_be32(slot->seq_nr);
1866         *p++ = cpu_to_be32(slot->slot_nr);
1867         *p++ = cpu_to_be32(tp->highest_used_slotid);
1868         *p = cpu_to_be32(args->sa_cache_this);
1869 #endif /* CONFIG_NFS_V4_1 */
1870 }
1871
1872 #ifdef CONFIG_NFS_V4_1
1873 static void
1874 encode_getdevicelist(struct xdr_stream *xdr,
1875                      const struct nfs4_getdevicelist_args *args,
1876                      struct compound_hdr *hdr)
1877 {
1878         __be32 *p;
1879         nfs4_verifier dummy = {
1880                 .data = "dummmmmy",
1881         };
1882
1883         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1884         p = reserve_space(xdr, 16);
1885         *p++ = cpu_to_be32(args->layoutclass);
1886         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1887         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1888         encode_nfs4_verifier(xdr, &dummy);
1889 }
1890
1891 static void
1892 encode_getdeviceinfo(struct xdr_stream *xdr,
1893                      const struct nfs4_getdeviceinfo_args *args,
1894                      struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897
1898         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1899         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1900         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1901                                     NFS4_DEVICEID4_SIZE);
1902         *p++ = cpu_to_be32(args->pdev->layout_type);
1903         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1904         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1905 }
1906
1907 static void
1908 encode_layoutget(struct xdr_stream *xdr,
1909                       const struct nfs4_layoutget_args *args,
1910                       struct compound_hdr *hdr)
1911 {
1912         __be32 *p;
1913
1914         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1915         p = reserve_space(xdr, 36);
1916         *p++ = cpu_to_be32(0);     /* Signal layout available */
1917         *p++ = cpu_to_be32(args->type);
1918         *p++ = cpu_to_be32(args->range.iomode);
1919         p = xdr_encode_hyper(p, args->range.offset);
1920         p = xdr_encode_hyper(p, args->range.length);
1921         p = xdr_encode_hyper(p, args->minlength);
1922         encode_nfs4_stateid(xdr, &args->stateid);
1923         encode_uint32(xdr, args->maxcount);
1924
1925         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1926                 __func__,
1927                 args->type,
1928                 args->range.iomode,
1929                 (unsigned long)args->range.offset,
1930                 (unsigned long)args->range.length,
1931                 args->maxcount);
1932 }
1933
1934 static int
1935 encode_layoutcommit(struct xdr_stream *xdr,
1936                     struct inode *inode,
1937                     const struct nfs4_layoutcommit_args *args,
1938                     struct compound_hdr *hdr)
1939 {
1940         __be32 *p;
1941
1942         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1943                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1944
1945         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1946         p = reserve_space(xdr, 20);
1947         /* Only whole file layouts */
1948         p = xdr_encode_hyper(p, 0); /* offset */
1949         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1950         *p = cpu_to_be32(0); /* reclaim */
1951         encode_nfs4_stateid(xdr, &args->stateid);
1952         p = reserve_space(xdr, 20);
1953         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1954         p = xdr_encode_hyper(p, args->lastbytewritten);
1955         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1956         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1957
1958         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1959                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1960                         NFS_I(inode)->layout, xdr, args);
1961         else
1962                 encode_uint32(xdr, 0); /* no layout-type payload */
1963
1964         return 0;
1965 }
1966
1967 static void
1968 encode_layoutreturn(struct xdr_stream *xdr,
1969                     const struct nfs4_layoutreturn_args *args,
1970                     struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1975         p = reserve_space(xdr, 16);
1976         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1977         *p++ = cpu_to_be32(args->layout_type);
1978         *p++ = cpu_to_be32(IOMODE_ANY);
1979         *p = cpu_to_be32(RETURN_FILE);
1980         p = reserve_space(xdr, 16);
1981         p = xdr_encode_hyper(p, 0);
1982         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1983         spin_lock(&args->inode->i_lock);
1984         encode_nfs4_stateid(xdr, &args->stateid);
1985         spin_unlock(&args->inode->i_lock);
1986         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1987                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1988                         NFS_I(args->inode)->layout, xdr, args);
1989         } else
1990                 encode_uint32(xdr, 0);
1991 }
1992
1993 static int
1994 encode_secinfo_no_name(struct xdr_stream *xdr,
1995                        const struct nfs41_secinfo_no_name_args *args,
1996                        struct compound_hdr *hdr)
1997 {
1998         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1999         encode_uint32(xdr, args->style);
2000         return 0;
2001 }
2002
2003 static void encode_test_stateid(struct xdr_stream *xdr,
2004                                 struct nfs41_test_stateid_args *args,
2005                                 struct compound_hdr *hdr)
2006 {
2007         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2008         encode_uint32(xdr, 1);
2009         encode_nfs4_stateid(xdr, args->stateid);
2010 }
2011
2012 static void encode_free_stateid(struct xdr_stream *xdr,
2013                                 struct nfs41_free_stateid_args *args,
2014                                 struct compound_hdr *hdr)
2015 {
2016         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2017         encode_nfs4_stateid(xdr, args->stateid);
2018 }
2019 #endif /* CONFIG_NFS_V4_1 */
2020
2021 /*
2022  * END OF "GENERIC" ENCODE ROUTINES.
2023  */
2024
2025 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2026 {
2027 #if defined(CONFIG_NFS_V4_1)
2028
2029         if (args->sa_slot)
2030                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2031 #endif /* CONFIG_NFS_V4_1 */
2032         return 0;
2033 }
2034
2035 /*
2036  * Encode an ACCESS request
2037  */
2038 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2039                                 const struct nfs4_accessargs *args)
2040 {
2041         struct compound_hdr hdr = {
2042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043         };
2044
2045         encode_compound_hdr(xdr, req, &hdr);
2046         encode_sequence(xdr, &args->seq_args, &hdr);
2047         encode_putfh(xdr, args->fh, &hdr);
2048         encode_access(xdr, args->access, &hdr);
2049         encode_getfattr(xdr, args->bitmask, &hdr);
2050         encode_nops(&hdr);
2051 }
2052
2053 /*
2054  * Encode LOOKUP request
2055  */
2056 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2057                                 const struct nfs4_lookup_arg *args)
2058 {
2059         struct compound_hdr hdr = {
2060                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2061         };
2062
2063         encode_compound_hdr(xdr, req, &hdr);
2064         encode_sequence(xdr, &args->seq_args, &hdr);
2065         encode_putfh(xdr, args->dir_fh, &hdr);
2066         encode_lookup(xdr, args->name, &hdr);
2067         encode_getfh(xdr, &hdr);
2068         encode_getfattr(xdr, args->bitmask, &hdr);
2069         encode_nops(&hdr);
2070 }
2071
2072 /*
2073  * Encode LOOKUP_ROOT request
2074  */
2075 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2076                                      struct xdr_stream *xdr,
2077                                      const struct nfs4_lookup_root_arg *args)
2078 {
2079         struct compound_hdr hdr = {
2080                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081         };
2082
2083         encode_compound_hdr(xdr, req, &hdr);
2084         encode_sequence(xdr, &args->seq_args, &hdr);
2085         encode_putrootfh(xdr, &hdr);
2086         encode_getfh(xdr, &hdr);
2087         encode_getfattr(xdr, args->bitmask, &hdr);
2088         encode_nops(&hdr);
2089 }
2090
2091 /*
2092  * Encode REMOVE request
2093  */
2094 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2095                                 const struct nfs_removeargs *args)
2096 {
2097         struct compound_hdr hdr = {
2098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099         };
2100
2101         encode_compound_hdr(xdr, req, &hdr);
2102         encode_sequence(xdr, &args->seq_args, &hdr);
2103         encode_putfh(xdr, args->fh, &hdr);
2104         encode_remove(xdr, &args->name, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode RENAME request
2110  */
2111 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2112                                 const struct nfs_renameargs *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putfh(xdr, args->old_dir, &hdr);
2121         encode_savefh(xdr, &hdr);
2122         encode_putfh(xdr, args->new_dir, &hdr);
2123         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode LINK request
2129  */
2130 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                              const struct nfs4_link_arg *args)
2132 {
2133         struct compound_hdr hdr = {
2134                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135         };
2136
2137         encode_compound_hdr(xdr, req, &hdr);
2138         encode_sequence(xdr, &args->seq_args, &hdr);
2139         encode_putfh(xdr, args->fh, &hdr);
2140         encode_savefh(xdr, &hdr);
2141         encode_putfh(xdr, args->dir_fh, &hdr);
2142         encode_link(xdr, args->name, &hdr);
2143         encode_restorefh(xdr, &hdr);
2144         encode_getfattr(xdr, args->bitmask, &hdr);
2145         encode_nops(&hdr);
2146 }
2147
2148 /*
2149  * Encode CREATE request
2150  */
2151 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                 const struct nfs4_create_arg *args)
2153 {
2154         struct compound_hdr hdr = {
2155                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156         };
2157
2158         encode_compound_hdr(xdr, req, &hdr);
2159         encode_sequence(xdr, &args->seq_args, &hdr);
2160         encode_putfh(xdr, args->dir_fh, &hdr);
2161         encode_create(xdr, args, &hdr);
2162         encode_getfh(xdr, &hdr);
2163         encode_getfattr(xdr, args->bitmask, &hdr);
2164         encode_nops(&hdr);
2165 }
2166
2167 /*
2168  * Encode SYMLINK request
2169  */
2170 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2171                                  const struct nfs4_create_arg *args)
2172 {
2173         nfs4_xdr_enc_create(req, xdr, args);
2174 }
2175
2176 /*
2177  * Encode GETATTR request
2178  */
2179 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2180                                  const struct nfs4_getattr_arg *args)
2181 {
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         encode_compound_hdr(xdr, req, &hdr);
2187         encode_sequence(xdr, &args->seq_args, &hdr);
2188         encode_putfh(xdr, args->fh, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_nops(&hdr);
2191 }
2192
2193 /*
2194  * Encode a CLOSE request
2195  */
2196 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2197                                struct nfs_closeargs *args)
2198 {
2199         struct compound_hdr hdr = {
2200                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201         };
2202
2203         encode_compound_hdr(xdr, req, &hdr);
2204         encode_sequence(xdr, &args->seq_args, &hdr);
2205         encode_putfh(xdr, args->fh, &hdr);
2206         encode_close(xdr, args, &hdr);
2207         encode_getfattr(xdr, args->bitmask, &hdr);
2208         encode_nops(&hdr);
2209 }
2210
2211 /*
2212  * Encode an OPEN request
2213  */
2214 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2215                               struct nfs_openargs *args)
2216 {
2217         struct compound_hdr hdr = {
2218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219         };
2220
2221         encode_compound_hdr(xdr, req, &hdr);
2222         encode_sequence(xdr, &args->seq_args, &hdr);
2223         encode_putfh(xdr, args->fh, &hdr);
2224         encode_open(xdr, args, &hdr);
2225         encode_getfh(xdr, &hdr);
2226         if (args->access)
2227                 encode_access(xdr, args->access, &hdr);
2228         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2229         encode_nops(&hdr);
2230 }
2231
2232 /*
2233  * Encode an OPEN_CONFIRM request
2234  */
2235 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2236                                       struct xdr_stream *xdr,
2237                                       struct nfs_open_confirmargs *args)
2238 {
2239         struct compound_hdr hdr = {
2240                 .nops   = 0,
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_putfh(xdr, args->fh, &hdr);
2245         encode_open_confirm(xdr, args, &hdr);
2246         encode_nops(&hdr);
2247 }
2248
2249 /*
2250  * Encode an OPEN request with no attributes.
2251  */
2252 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2253                                      struct xdr_stream *xdr,
2254                                      struct nfs_openargs *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_open(xdr, args, &hdr);
2264         if (args->access)
2265                 encode_access(xdr, args->access, &hdr);
2266         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2267         encode_nops(&hdr);
2268 }
2269
2270 /*
2271  * Encode an OPEN_DOWNGRADE request
2272  */
2273 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2274                                         struct xdr_stream *xdr,
2275                                         struct nfs_closeargs *args)
2276 {
2277         struct compound_hdr hdr = {
2278                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2279         };
2280
2281         encode_compound_hdr(xdr, req, &hdr);
2282         encode_sequence(xdr, &args->seq_args, &hdr);
2283         encode_putfh(xdr, args->fh, &hdr);
2284         encode_open_downgrade(xdr, args, &hdr);
2285         encode_getfattr(xdr, args->bitmask, &hdr);
2286         encode_nops(&hdr);
2287 }
2288
2289 /*
2290  * Encode a LOCK request
2291  */
2292 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2293                               struct nfs_lock_args *args)
2294 {
2295         struct compound_hdr hdr = {
2296                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2297         };
2298
2299         encode_compound_hdr(xdr, req, &hdr);
2300         encode_sequence(xdr, &args->seq_args, &hdr);
2301         encode_putfh(xdr, args->fh, &hdr);
2302         encode_lock(xdr, args, &hdr);
2303         encode_nops(&hdr);
2304 }
2305
2306 /*
2307  * Encode a LOCKT request
2308  */
2309 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2310                                struct nfs_lockt_args *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_sequence(xdr, &args->seq_args, &hdr);
2318         encode_putfh(xdr, args->fh, &hdr);
2319         encode_lockt(xdr, args, &hdr);
2320         encode_nops(&hdr);
2321 }
2322
2323 /*
2324  * Encode a LOCKU request
2325  */
2326 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2327                                struct nfs_locku_args *args)
2328 {
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_locku(xdr, args, &hdr);
2337         encode_nops(&hdr);
2338 }
2339
2340 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2341                                            struct xdr_stream *xdr,
2342                                         struct nfs_release_lockowner_args *args)
2343 {
2344         struct compound_hdr hdr = {
2345                 .minorversion = 0,
2346         };
2347
2348         encode_compound_hdr(xdr, req, &hdr);
2349         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * Encode a READLINK request
2355  */
2356 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2357                                   const struct nfs4_readlink *args)
2358 {
2359         struct compound_hdr hdr = {
2360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_sequence(xdr, &args->seq_args, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_readlink(xdr, args, req, &hdr);
2367
2368         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2369                         args->pgbase, args->pglen);
2370         encode_nops(&hdr);
2371 }
2372
2373 /*
2374  * Encode a READDIR request
2375  */
2376 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2377                                  const struct nfs4_readdir_arg *args)
2378 {
2379         struct compound_hdr hdr = {
2380                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381         };
2382
2383         encode_compound_hdr(xdr, req, &hdr);
2384         encode_sequence(xdr, &args->seq_args, &hdr);
2385         encode_putfh(xdr, args->fh, &hdr);
2386         encode_readdir(xdr, args, req, &hdr);
2387
2388         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2389                          args->pgbase, args->count);
2390         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2391                         __func__, hdr.replen << 2, args->pages,
2392                         args->pgbase, args->count);
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode a READ request
2398  */
2399 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2400                               struct nfs_readargs *args)
2401 {
2402         struct compound_hdr hdr = {
2403                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2404         };
2405
2406         encode_compound_hdr(xdr, req, &hdr);
2407         encode_sequence(xdr, &args->seq_args, &hdr);
2408         encode_putfh(xdr, args->fh, &hdr);
2409         encode_read(xdr, args, &hdr);
2410
2411         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2412                          args->pages, args->pgbase, args->count);
2413         req->rq_rcv_buf.flags |= XDRBUF_READ;
2414         encode_nops(&hdr);
2415 }
2416
2417 /*
2418  * Encode an SETATTR request
2419  */
2420 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2421                                  struct nfs_setattrargs *args)
2422 {
2423         struct compound_hdr hdr = {
2424                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425         };
2426
2427         encode_compound_hdr(xdr, req, &hdr);
2428         encode_sequence(xdr, &args->seq_args, &hdr);
2429         encode_putfh(xdr, args->fh, &hdr);
2430         encode_setattr(xdr, args, args->server, &hdr);
2431         encode_getfattr(xdr, args->bitmask, &hdr);
2432         encode_nops(&hdr);
2433 }
2434
2435 /*
2436  * Encode a GETACL request
2437  */
2438 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2439                                 struct nfs_getaclargs *args)
2440 {
2441         struct compound_hdr hdr = {
2442                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443         };
2444         uint32_t replen;
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2450         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2451
2452         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2453                 args->acl_pages, args->acl_pgbase, args->acl_len);
2454
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * Encode a WRITE request
2460  */
2461 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2462                                struct nfs_writeargs *args)
2463 {
2464         struct compound_hdr hdr = {
2465                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466         };
2467
2468         encode_compound_hdr(xdr, req, &hdr);
2469         encode_sequence(xdr, &args->seq_args, &hdr);
2470         encode_putfh(xdr, args->fh, &hdr);
2471         encode_write(xdr, args, &hdr);
2472         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2473         if (args->bitmask)
2474                 encode_getfattr(xdr, args->bitmask, &hdr);
2475         encode_nops(&hdr);
2476 }
2477
2478 /*
2479  *  a COMMIT request
2480  */
2481 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2482                                 struct nfs_commitargs *args)
2483 {
2484         struct compound_hdr hdr = {
2485                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2486         };
2487
2488         encode_compound_hdr(xdr, req, &hdr);
2489         encode_sequence(xdr, &args->seq_args, &hdr);
2490         encode_putfh(xdr, args->fh, &hdr);
2491         encode_commit(xdr, args, &hdr);
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * FSINFO request
2497  */
2498 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                 struct nfs4_fsinfo_arg *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_fsinfo(xdr, args->bitmask, &hdr);
2509         encode_nops(&hdr);
2510 }
2511
2512 /*
2513  * a PATHCONF request
2514  */
2515 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2516                                   const struct nfs4_pathconf_arg *args)
2517 {
2518         struct compound_hdr hdr = {
2519                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520         };
2521
2522         encode_compound_hdr(xdr, req, &hdr);
2523         encode_sequence(xdr, &args->seq_args, &hdr);
2524         encode_putfh(xdr, args->fh, &hdr);
2525         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2526                            &hdr);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * a STATFS request
2532  */
2533 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                 const struct nfs4_statfs_arg *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2544                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2545         encode_nops(&hdr);
2546 }
2547
2548 /*
2549  * GETATTR_BITMAP request
2550  */
2551 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2552                                      struct xdr_stream *xdr,
2553                                      struct nfs4_server_caps_arg *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fhandle, &hdr);
2562         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2563                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2564                            FATTR4_WORD0_LINK_SUPPORT|
2565                            FATTR4_WORD0_SYMLINK_SUPPORT|
2566                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * a RENEW request
2572  */
2573 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                struct nfs_client *clp)
2575 {
2576         struct compound_hdr hdr = {
2577                 .nops   = 0,
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_renew(xdr, clp->cl_clientid, &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a SETCLIENTID request
2587  */
2588 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2589                                      struct xdr_stream *xdr,
2590                                      struct nfs4_setclientid *sc)
2591 {
2592         struct compound_hdr hdr = {
2593                 .nops   = 0,
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_setclientid(xdr, sc, &hdr);
2598         encode_nops(&hdr);
2599 }
2600
2601 /*
2602  * a SETCLIENTID_CONFIRM request
2603  */
2604 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2605                                              struct xdr_stream *xdr,
2606                                              struct nfs4_setclientid_res *arg)
2607 {
2608         struct compound_hdr hdr = {
2609                 .nops   = 0,
2610         };
2611         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2612
2613         encode_compound_hdr(xdr, req, &hdr);
2614         encode_setclientid_confirm(xdr, arg, &hdr);
2615         encode_putrootfh(xdr, &hdr);
2616         encode_fsinfo(xdr, lease_bitmap, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * DELEGRETURN request
2622  */
2623 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2624                                      struct xdr_stream *xdr,
2625                                      const struct nfs4_delegreturnargs *args)
2626 {
2627         struct compound_hdr hdr = {
2628                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_sequence(xdr, &args->seq_args, &hdr);
2633         encode_putfh(xdr, args->fhandle, &hdr);
2634         encode_getfattr(xdr, args->bitmask, &hdr);
2635         encode_delegreturn(xdr, args->stateid, &hdr);
2636         encode_nops(&hdr);
2637 }
2638
2639 /*
2640  * Encode FS_LOCATIONS request
2641  */
2642 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2643                                       struct xdr_stream *xdr,
2644                                       struct nfs4_fs_locations_arg *args)
2645 {
2646         struct compound_hdr hdr = {
2647                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2648         };
2649         uint32_t replen;
2650
2651         encode_compound_hdr(xdr, req, &hdr);
2652         encode_sequence(xdr, &args->seq_args, &hdr);
2653         encode_putfh(xdr, args->dir_fh, &hdr);
2654         encode_lookup(xdr, args->name, &hdr);
2655         replen = hdr.replen;    /* get the attribute into args->page */
2656         encode_fs_locations(xdr, args->bitmask, &hdr);
2657
2658         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2659                         0, PAGE_SIZE);
2660         encode_nops(&hdr);
2661 }
2662
2663 /*
2664  * Encode SECINFO request
2665  */
2666 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2667                                 struct xdr_stream *xdr,
2668                                 struct nfs4_secinfo_arg *args)
2669 {
2670         struct compound_hdr hdr = {
2671                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2672         };
2673
2674         encode_compound_hdr(xdr, req, &hdr);
2675         encode_sequence(xdr, &args->seq_args, &hdr);
2676         encode_putfh(xdr, args->dir_fh, &hdr);
2677         encode_secinfo(xdr, args->name, &hdr);
2678         encode_nops(&hdr);
2679 }
2680
2681 #if defined(CONFIG_NFS_V4_1)
2682 /*
2683  * BIND_CONN_TO_SESSION request
2684  */
2685 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2686                                 struct xdr_stream *xdr,
2687                                 struct nfs_client *clp)
2688 {
2689         struct compound_hdr hdr = {
2690                 .minorversion = clp->cl_mvops->minor_version,
2691         };
2692
2693         encode_compound_hdr(xdr, req, &hdr);
2694         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2695         encode_nops(&hdr);
2696 }
2697
2698 /*
2699  * EXCHANGE_ID request
2700  */
2701 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2702                                      struct xdr_stream *xdr,
2703                                      struct nfs41_exchange_id_args *args)
2704 {
2705         struct compound_hdr hdr = {
2706                 .minorversion = args->client->cl_mvops->minor_version,
2707         };
2708
2709         encode_compound_hdr(xdr, req, &hdr);
2710         encode_exchange_id(xdr, args, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * a CREATE_SESSION request
2716  */
2717 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2718                                         struct xdr_stream *xdr,
2719                                         struct nfs41_create_session_args *args)
2720 {
2721         struct compound_hdr hdr = {
2722                 .minorversion = args->client->cl_mvops->minor_version,
2723         };
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_create_session(xdr, args, &hdr);
2727         encode_nops(&hdr);
2728 }
2729
2730 /*
2731  * a DESTROY_SESSION request
2732  */
2733 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2734                                          struct xdr_stream *xdr,
2735                                          struct nfs4_session *session)
2736 {
2737         struct compound_hdr hdr = {
2738                 .minorversion = session->clp->cl_mvops->minor_version,
2739         };
2740
2741         encode_compound_hdr(xdr, req, &hdr);
2742         encode_destroy_session(xdr, session, &hdr);
2743         encode_nops(&hdr);
2744 }
2745
2746 /*
2747  * a DESTROY_CLIENTID request
2748  */
2749 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2750                                          struct xdr_stream *xdr,
2751                                          struct nfs_client *clp)
2752 {
2753         struct compound_hdr hdr = {
2754                 .minorversion = clp->cl_mvops->minor_version,
2755         };
2756
2757         encode_compound_hdr(xdr, req, &hdr);
2758         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2759         encode_nops(&hdr);
2760 }
2761
2762 /*
2763  * a SEQUENCE request
2764  */
2765 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2766                                   struct nfs4_sequence_args *args)
2767 {
2768         struct compound_hdr hdr = {
2769                 .minorversion = nfs4_xdr_minorversion(args),
2770         };
2771
2772         encode_compound_hdr(xdr, req, &hdr);
2773         encode_sequence(xdr, args, &hdr);
2774         encode_nops(&hdr);
2775 }
2776
2777 /*
2778  * a GET_LEASE_TIME request
2779  */
2780 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2781                                         struct xdr_stream *xdr,
2782                                         struct nfs4_get_lease_time_args *args)
2783 {
2784         struct compound_hdr hdr = {
2785                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2786         };
2787         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2788
2789         encode_compound_hdr(xdr, req, &hdr);
2790         encode_sequence(xdr, &args->la_seq_args, &hdr);
2791         encode_putrootfh(xdr, &hdr);
2792         encode_fsinfo(xdr, lease_bitmap, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * a RECLAIM_COMPLETE request
2798  */
2799 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2800                                           struct xdr_stream *xdr,
2801                                 struct nfs41_reclaim_complete_args *args)
2802 {
2803         struct compound_hdr hdr = {
2804                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2805         };
2806
2807         encode_compound_hdr(xdr, req, &hdr);
2808         encode_sequence(xdr, &args->seq_args, &hdr);
2809         encode_reclaim_complete(xdr, args, &hdr);
2810         encode_nops(&hdr);
2811 }
2812
2813 /*
2814  * Encode GETDEVICELIST request
2815  */
2816 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2817                                        struct xdr_stream *xdr,
2818                                        struct nfs4_getdevicelist_args *args)
2819 {
2820         struct compound_hdr hdr = {
2821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2822         };
2823
2824         encode_compound_hdr(xdr, req, &hdr);
2825         encode_sequence(xdr, &args->seq_args, &hdr);
2826         encode_putfh(xdr, args->fh, &hdr);
2827         encode_getdevicelist(xdr, args, &hdr);
2828         encode_nops(&hdr);
2829 }
2830
2831 /*
2832  * Encode GETDEVICEINFO request
2833  */
2834 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2835                                        struct xdr_stream *xdr,
2836                                        struct nfs4_getdeviceinfo_args *args)
2837 {
2838         struct compound_hdr hdr = {
2839                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2840         };
2841
2842         encode_compound_hdr(xdr, req, &hdr);
2843         encode_sequence(xdr, &args->seq_args, &hdr);
2844         encode_getdeviceinfo(xdr, args, &hdr);
2845
2846         /* set up reply kvec. Subtract notification bitmap max size (2)
2847          * so that notification bitmap is put in xdr_buf tail */
2848         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2849                          args->pdev->pages, args->pdev->pgbase,
2850                          args->pdev->pglen);
2851
2852         encode_nops(&hdr);
2853 }
2854
2855 /*
2856  *  Encode LAYOUTGET request
2857  */
2858 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2859                                    struct xdr_stream *xdr,
2860                                    struct nfs4_layoutget_args *args)
2861 {
2862         struct compound_hdr hdr = {
2863                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2864         };
2865
2866         encode_compound_hdr(xdr, req, &hdr);
2867         encode_sequence(xdr, &args->seq_args, &hdr);
2868         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2869         encode_layoutget(xdr, args, &hdr);
2870
2871         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2872             args->layout.pages, 0, args->layout.pglen);
2873
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  *  Encode LAYOUTCOMMIT request
2879  */
2880 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2881                                       struct xdr_stream *xdr,
2882                                       struct nfs4_layoutcommit_args *args)
2883 {
2884         struct nfs4_layoutcommit_data *data =
2885                 container_of(args, struct nfs4_layoutcommit_data, args);
2886         struct compound_hdr hdr = {
2887                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2888         };
2889
2890         encode_compound_hdr(xdr, req, &hdr);
2891         encode_sequence(xdr, &args->seq_args, &hdr);
2892         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2893         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2894         encode_getfattr(xdr, args->bitmask, &hdr);
2895         encode_nops(&hdr);
2896 }
2897
2898 /*
2899  * Encode LAYOUTRETURN request
2900  */
2901 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2902                                       struct xdr_stream *xdr,
2903                                       struct nfs4_layoutreturn_args *args)
2904 {
2905         struct compound_hdr hdr = {
2906                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2907         };
2908
2909         encode_compound_hdr(xdr, req, &hdr);
2910         encode_sequence(xdr, &args->seq_args, &hdr);
2911         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2912         encode_layoutreturn(xdr, args, &hdr);
2913         encode_nops(&hdr);
2914 }
2915
2916 /*
2917  * Encode SECINFO_NO_NAME request
2918  */
2919 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2920                                         struct xdr_stream *xdr,
2921                                         struct nfs41_secinfo_no_name_args *args)
2922 {
2923         struct compound_hdr hdr = {
2924                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925         };
2926
2927         encode_compound_hdr(xdr, req, &hdr);
2928         encode_sequence(xdr, &args->seq_args, &hdr);
2929         encode_putrootfh(xdr, &hdr);
2930         encode_secinfo_no_name(xdr, args, &hdr);
2931         encode_nops(&hdr);
2932         return 0;
2933 }
2934
2935 /*
2936  *  Encode TEST_STATEID request
2937  */
2938 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2939                                       struct xdr_stream *xdr,
2940                                       struct nfs41_test_stateid_args *args)
2941 {
2942         struct compound_hdr hdr = {
2943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944         };
2945
2946         encode_compound_hdr(xdr, req, &hdr);
2947         encode_sequence(xdr, &args->seq_args, &hdr);
2948         encode_test_stateid(xdr, args, &hdr);
2949         encode_nops(&hdr);
2950 }
2951
2952 /*
2953  *  Encode FREE_STATEID request
2954  */
2955 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2956                                      struct xdr_stream *xdr,
2957                                      struct nfs41_free_stateid_args *args)
2958 {
2959         struct compound_hdr hdr = {
2960                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2961         };
2962
2963         encode_compound_hdr(xdr, req, &hdr);
2964         encode_sequence(xdr, &args->seq_args, &hdr);
2965         encode_free_stateid(xdr, args, &hdr);
2966         encode_nops(&hdr);
2967 }
2968 #endif /* CONFIG_NFS_V4_1 */
2969
2970 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2971 {
2972         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2973                 "Remaining buffer length is %tu words.\n",
2974                 func, xdr->end - xdr->p);
2975 }
2976
2977 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2978 {
2979         __be32 *p;
2980
2981         p = xdr_inline_decode(xdr, 4);
2982         if (unlikely(!p))
2983                 goto out_overflow;
2984         *len = be32_to_cpup(p);
2985         p = xdr_inline_decode(xdr, *len);
2986         if (unlikely(!p))
2987                 goto out_overflow;
2988         *string = (char *)p;
2989         return 0;
2990 out_overflow:
2991         print_overflow_msg(__func__, xdr);
2992         return -EIO;
2993 }
2994
2995 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2996 {
2997         __be32 *p;
2998
2999         p = xdr_inline_decode(xdr, 8);
3000         if (unlikely(!p))
3001                 goto out_overflow;
3002         hdr->status = be32_to_cpup(p++);
3003         hdr->taglen = be32_to_cpup(p);
3004
3005         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3006         if (unlikely(!p))
3007                 goto out_overflow;
3008         hdr->tag = (char *)p;
3009         p += XDR_QUADLEN(hdr->taglen);
3010         hdr->nops = be32_to_cpup(p);
3011         if (unlikely(hdr->nops < 1))
3012                 return nfs4_stat_to_errno(hdr->status);
3013         return 0;
3014 out_overflow:
3015         print_overflow_msg(__func__, xdr);
3016         return -EIO;
3017 }
3018
3019 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3020 {
3021         __be32 *p;
3022         uint32_t opnum;
3023         int32_t nfserr;
3024
3025         p = xdr_inline_decode(xdr, 8);
3026         if (unlikely(!p))
3027                 goto out_overflow;
3028         opnum = be32_to_cpup(p++);
3029         if (opnum != expected) {
3030                 dprintk("nfs: Server returned operation"
3031                         " %d but we issued a request for %d\n",
3032                                 opnum, expected);
3033                 return -EIO;
3034         }
3035         nfserr = be32_to_cpup(p);
3036         if (nfserr != NFS_OK)
3037                 return nfs4_stat_to_errno(nfserr);
3038         return 0;
3039 out_overflow:
3040         print_overflow_msg(__func__, xdr);
3041         return -EIO;
3042 }
3043
3044 /* Dummy routine */
3045 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3046 {
3047         __be32 *p;
3048         unsigned int strlen;
3049         char *str;
3050
3051         p = xdr_inline_decode(xdr, 12);
3052         if (likely(p))
3053                 return decode_opaque_inline(xdr, &strlen, &str);
3054         print_overflow_msg(__func__, xdr);
3055         return -EIO;
3056 }
3057
3058 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3059 {
3060         uint32_t bmlen;
3061         __be32 *p;
3062
3063         p = xdr_inline_decode(xdr, 4);
3064         if (unlikely(!p))
3065                 goto out_overflow;
3066         bmlen = be32_to_cpup(p);
3067
3068         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3069         p = xdr_inline_decode(xdr, (bmlen << 2));
3070         if (unlikely(!p))
3071                 goto out_overflow;
3072         if (bmlen > 0) {
3073                 bitmap[0] = be32_to_cpup(p++);
3074                 if (bmlen > 1) {
3075                         bitmap[1] = be32_to_cpup(p++);
3076                         if (bmlen > 2)
3077                                 bitmap[2] = be32_to_cpup(p);
3078                 }
3079         }
3080         return 0;
3081 out_overflow:
3082         print_overflow_msg(__func__, xdr);
3083         return -EIO;
3084 }
3085
3086 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3087 {
3088         __be32 *p;
3089
3090         p = xdr_inline_decode(xdr, 4);
3091         if (unlikely(!p))
3092                 goto out_overflow;
3093         *attrlen = be32_to_cpup(p);
3094         *savep = xdr_stream_pos(xdr);
3095         return 0;
3096 out_overflow:
3097         print_overflow_msg(__func__, xdr);
3098         return -EIO;
3099 }
3100
3101 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3102 {
3103         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3104                 int ret;
3105                 ret = decode_attr_bitmap(xdr, bitmask);
3106                 if (unlikely(ret < 0))
3107                         return ret;
3108                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3109         } else
3110                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3111         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3112                 bitmask[0], bitmask[1], bitmask[2]);
3113         return 0;
3114 }
3115
3116 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3117 {
3118         __be32 *p;
3119         int ret = 0;
3120
3121         *type = 0;
3122         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3123                 return -EIO;
3124         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3125                 p = xdr_inline_decode(xdr, 4);
3126                 if (unlikely(!p))
3127                         goto out_overflow;
3128                 *type = be32_to_cpup(p);
3129                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3130                         dprintk("%s: bad type %d\n", __func__, *type);
3131                         return -EIO;
3132                 }
3133                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3134                 ret = NFS_ATTR_FATTR_TYPE;
3135         }
3136         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3137         return ret;
3138 out_overflow:
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3144                                       uint32_t *bitmap, uint32_t *type)
3145 {
3146         __be32 *p;
3147
3148         *type = 0;
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3150                 return -EIO;
3151         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3152                 p = xdr_inline_decode(xdr, 4);
3153                 if (unlikely(!p))
3154                         goto out_overflow;
3155                 *type = be32_to_cpup(p);
3156                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3157         }
3158         dprintk("%s: expire type=0x%x\n", __func__, *type);
3159         return 0;
3160 out_overflow:
3161         print_overflow_msg(__func__, xdr);
3162         return -EIO;
3163 }
3164
3165 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3166 {
3167         __be32 *p;
3168         int ret = 0;
3169
3170         *change = 0;
3171         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3172                 return -EIO;
3173         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3174                 p = xdr_inline_decode(xdr, 8);
3175                 if (unlikely(!p))
3176                         goto out_overflow;
3177                 xdr_decode_hyper(p, change);
3178                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3179                 ret = NFS_ATTR_FATTR_CHANGE;
3180         }
3181         dprintk("%s: change attribute=%Lu\n", __func__,
3182                         (unsigned long long)*change);
3183         return ret;
3184 out_overflow:
3185         print_overflow_msg(__func__, xdr);
3186         return -EIO;
3187 }
3188
3189 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3190 {
3191         __be32 *p;
3192         int ret = 0;
3193
3194         *size = 0;
3195         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3196                 return -EIO;
3197         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3198                 p = xdr_inline_decode(xdr, 8);
3199                 if (unlikely(!p))
3200                         goto out_overflow;
3201                 xdr_decode_hyper(p, size);
3202                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3203                 ret = NFS_ATTR_FATTR_SIZE;
3204         }
3205         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3206         return ret;
3207 out_overflow:
3208         print_overflow_msg(__func__, xdr);
3209         return -EIO;
3210 }
3211
3212 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3213 {
3214         __be32 *p;
3215
3216         *res = 0;
3217         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3218                 return -EIO;
3219         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3220                 p = xdr_inline_decode(xdr, 4);
3221                 if (unlikely(!p))
3222                         goto out_overflow;
3223                 *res = be32_to_cpup(p);
3224                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3225         }
3226         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3227         return 0;
3228 out_overflow:
3229         print_overflow_msg(__func__, xdr);
3230         return -EIO;
3231 }
3232
3233 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3234 {
3235         __be32 *p;
3236
3237         *res = 0;
3238         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3241                 p = xdr_inline_decode(xdr, 4);
3242                 if (unlikely(!p))
3243                         goto out_overflow;
3244                 *res = be32_to_cpup(p);
3245                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3246         }
3247         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3248         return 0;
3249 out_overflow:
3250         print_overflow_msg(__func__, xdr);
3251         return -EIO;
3252 }
3253
3254 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3255 {
3256         __be32 *p;
3257         int ret = 0;
3258
3259         fsid->major = 0;
3260         fsid->minor = 0;
3261         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3262                 return -EIO;
3263         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3264                 p = xdr_inline_decode(xdr, 16);
3265                 if (unlikely(!p))
3266                         goto out_overflow;
3267                 p = xdr_decode_hyper(p, &fsid->major);
3268                 xdr_decode_hyper(p, &fsid->minor);
3269                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3270                 ret = NFS_ATTR_FATTR_FSID;
3271         }
3272         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3273                         (unsigned long long)fsid->major,
3274                         (unsigned long long)fsid->minor);
3275         return ret;
3276 out_overflow:
3277         print_overflow_msg(__func__, xdr);
3278         return -EIO;
3279 }
3280
3281 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3282 {
3283         __be32 *p;
3284
3285         *res = 60;
3286         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3287                 return -EIO;
3288         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3289                 p = xdr_inline_decode(xdr, 4);
3290                 if (unlikely(!p))
3291                         goto out_overflow;
3292                 *res = be32_to_cpup(p);
3293                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3294         }
3295         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3296         return 0;
3297 out_overflow:
3298         print_overflow_msg(__func__, xdr);
3299         return -EIO;
3300 }
3301
3302 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3303 {
3304         __be32 *p;
3305
3306         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3307                 return -EIO;
3308         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3309                 p = xdr_inline_decode(xdr, 4);
3310                 if (unlikely(!p))
3311                         goto out_overflow;
3312                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3313                 *res = -be32_to_cpup(p);
3314         }
3315         return 0;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3322 {
3323         __be32 *p;
3324         int len;
3325
3326         if (fh != NULL)
3327                 memset(fh, 0, sizeof(*fh));
3328
3329         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3330                 return -EIO;
3331         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3332                 p = xdr_inline_decode(xdr, 4);
3333                 if (unlikely(!p))
3334                         goto out_overflow;
3335                 len = be32_to_cpup(p);
3336                 if (len > NFS4_FHSIZE)
3337                         return -EIO;
3338                 p = xdr_inline_decode(xdr, len);
3339                 if (unlikely(!p))
3340                         goto out_overflow;
3341                 if (fh != NULL) {
3342                         memcpy(fh->data, p, len);
3343                         fh->size = len;
3344                 }
3345                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3346         }
3347         return 0;
3348 out_overflow:
3349         print_overflow_msg(__func__, xdr);
3350         return -EIO;
3351 }
3352
3353 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3354 {
3355         __be32 *p;
3356
3357         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3358         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3359                 return -EIO;
3360         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3361                 p = xdr_inline_decode(xdr, 4);
3362                 if (unlikely(!p))
3363                         goto out_overflow;
3364                 *res = be32_to_cpup(p);
3365                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3366         }
3367         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3368         return 0;
3369 out_overflow:
3370         print_overflow_msg(__func__, xdr);
3371         return -EIO;
3372 }
3373
3374 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3375 {
3376         __be32 *p;
3377         int ret = 0;
3378
3379         *fileid = 0;
3380         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3383                 p = xdr_inline_decode(xdr, 8);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 xdr_decode_hyper(p, fileid);
3387                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3388                 ret = NFS_ATTR_FATTR_FILEID;
3389         }
3390         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3391         return ret;
3392 out_overflow:
3393         print_overflow_msg(__func__, xdr);
3394         return -EIO;
3395 }
3396
3397 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3398 {
3399         __be32 *p;
3400         int ret = 0;
3401
3402         *fileid = 0;
3403         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3404                 return -EIO;
3405         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3406                 p = xdr_inline_decode(xdr, 8);
3407                 if (unlikely(!p))
3408                         goto out_overflow;
3409                 xdr_decode_hyper(p, fileid);
3410                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3411                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3412         }
3413         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3414         return ret;
3415 out_overflow:
3416         print_overflow_msg(__func__, xdr);
3417         return -EIO;
3418 }
3419
3420 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3421 {
3422         __be32 *p;
3423         int status = 0;
3424
3425         *res = 0;
3426         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3427                 return -EIO;
3428         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3429                 p = xdr_inline_decode(xdr, 8);
3430                 if (unlikely(!p))
3431                         goto out_overflow;
3432                 xdr_decode_hyper(p, res);
3433                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3434         }
3435         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3436         return status;
3437 out_overflow:
3438         print_overflow_msg(__func__, xdr);
3439         return -EIO;
3440 }
3441
3442 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3443 {
3444         __be32 *p;
3445         int status = 0;
3446
3447         *res = 0;
3448         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3451                 p = xdr_inline_decode(xdr, 8);
3452                 if (unlikely(!p))
3453                         goto out_overflow;
3454                 xdr_decode_hyper(p, res);
3455                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3456         }
3457         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3458         return status;
3459 out_overflow:
3460         print_overflow_msg(__func__, xdr);
3461         return -EIO;
3462 }
3463
3464 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3465 {
3466         __be32 *p;
3467         int status = 0;
3468
3469         *res = 0;
3470         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3471                 return -EIO;
3472         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3473                 p = xdr_inline_decode(xdr, 8);
3474                 if (unlikely(!p))
3475                         goto out_overflow;
3476                 xdr_decode_hyper(p, res);
3477                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3478         }
3479         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3480         return status;
3481 out_overflow:
3482         print_overflow_msg(__func__, xdr);
3483         return -EIO;
3484 }
3485
3486 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3487 {
3488         u32 n;
3489         __be32 *p;
3490         int status = 0;
3491
3492         p = xdr_inline_decode(xdr, 4);
3493         if (unlikely(!p))
3494                 goto out_overflow;
3495         n = be32_to_cpup(p);
3496         if (n == 0)
3497                 goto root_path;
3498         dprintk("pathname4: ");
3499         path->ncomponents = 0;
3500         while (path->ncomponents < n) {
3501                 struct nfs4_string *component = &path->components[path->ncomponents];
3502                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3503                 if (unlikely(status != 0))
3504                         goto out_eio;
3505                 ifdebug (XDR)
3506                         pr_cont("%s%.*s ",
3507                                 (path->ncomponents != n ? "/ " : ""),
3508                                 component->len, component->data);
3509                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3510                         path->ncomponents++;
3511                 else {
3512                         dprintk("cannot parse %d components in path\n", n);
3513                         goto out_eio;
3514                 }
3515         }
3516 out:
3517         return status;
3518 root_path:
3519 /* a root pathname is sent as a zero component4 */
3520         path->ncomponents = 1;
3521         path->components[0].len=0;
3522         path->components[0].data=NULL;
3523         dprintk("pathname4: /\n");
3524         goto out;
3525 out_eio:
3526         dprintk(" status %d", status);
3527         status = -EIO;
3528         goto out;
3529 out_overflow:
3530         print_overflow_msg(__func__, xdr);
3531         return -EIO;
3532 }
3533
3534 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3535 {
3536         int n;
3537         __be32 *p;
3538         int status = -EIO;
3539
3540         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3541                 goto out;
3542         status = 0;
3543         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3544                 goto out;
3545         status = -EIO;
3546         /* Ignore borken servers that return unrequested attrs */
3547         if (unlikely(res == NULL))
3548                 goto out;
3549         dprintk("%s: fsroot:\n", __func__);
3550         status = decode_pathname(xdr, &res->fs_path);
3551         if (unlikely(status != 0))
3552                 goto out;
3553         p = xdr_inline_decode(xdr, 4);
3554         if (unlikely(!p))
3555                 goto out_overflow;
3556         n = be32_to_cpup(p);
3557         if (n <= 0)
3558                 goto out_eio;
3559         res->nlocations = 0;
3560         while (res->nlocations < n) {
3561                 u32 m;
3562                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3563
3564                 p = xdr_inline_decode(xdr, 4);
3565                 if (unlikely(!p))
3566                         goto out_overflow;
3567                 m = be32_to_cpup(p);
3568
3569                 loc->nservers = 0;
3570                 dprintk("%s: servers:\n", __func__);
3571                 while (loc->nservers < m) {
3572                         struct nfs4_string *server = &loc->servers[loc->nservers];
3573                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3574                         if (unlikely(status != 0))
3575                                 goto out_eio;
3576                         dprintk("%s ", server->data);
3577                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3578                                 loc->nservers++;
3579                         else {
3580                                 unsigned int i;
3581                                 dprintk("%s: using first %u of %u servers "
3582                                         "returned for location %u\n",
3583                                                 __func__,
3584                                                 NFS4_FS_LOCATION_MAXSERVERS,
3585                                                 m, res->nlocations);
3586                                 for (i = loc->nservers; i < m; i++) {
3587                                         unsigned int len;
3588                                         char *data;
3589                                         status = decode_opaque_inline(xdr, &len, &data);
3590                                         if (unlikely(status != 0))
3591                                                 goto out_eio;
3592                                 }
3593                         }
3594                 }
3595                 status = decode_pathname(xdr, &loc->rootpath);
3596                 if (unlikely(status != 0))
3597                         goto out_eio;
3598                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3599                         res->nlocations++;
3600         }
3601         if (res->nlocations != 0)
3602                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3603 out:
3604         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3605         return status;
3606 out_overflow:
3607         print_overflow_msg(__func__, xdr);
3608 out_eio:
3609         status = -EIO;
3610         goto out;
3611 }
3612
3613 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3614 {
3615         __be32 *p;
3616         int status = 0;
3617
3618         *res = 0;
3619         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3620                 return -EIO;
3621         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3622                 p = xdr_inline_decode(xdr, 8);
3623                 if (unlikely(!p))
3624                         goto out_overflow;
3625                 xdr_decode_hyper(p, res);
3626                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3627         }
3628         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3629         return status;
3630 out_overflow:
3631         print_overflow_msg(__func__, xdr);
3632         return -EIO;
3633 }
3634
3635 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3636 {
3637         __be32 *p;
3638         int status = 0;
3639
3640         *maxlink = 1;
3641         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3642                 return -EIO;
3643         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3644                 p = xdr_inline_decode(xdr, 4);
3645                 if (unlikely(!p))
3646                         goto out_overflow;
3647                 *maxlink = be32_to_cpup(p);
3648                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3649         }
3650         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3651         return status;
3652 out_overflow:
3653         print_overflow_msg(__func__, xdr);
3654         return -EIO;
3655 }
3656
3657 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3658 {
3659         __be32 *p;
3660         int status = 0;
3661
3662         *maxname = 1024;
3663         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3664                 return -EIO;
3665         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3666                 p = xdr_inline_decode(xdr, 4);
3667                 if (unlikely(!p))
3668                         goto out_overflow;
3669                 *maxname = be32_to_cpup(p);
3670                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3671         }
3672         dprintk("%s: maxname=%u\n", __func__, *maxname);
3673         return status;
3674 out_overflow:
3675         print_overflow_msg(__func__, xdr);
3676         return -EIO;
3677 }
3678
3679 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3680 {
3681         __be32 *p;
3682         int status = 0;
3683
3684         *res = 1024;
3685         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3686                 return -EIO;
3687         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3688                 uint64_t maxread;
3689                 p = xdr_inline_decode(xdr, 8);
3690                 if (unlikely(!p))
3691                         goto out_overflow;
3692                 xdr_decode_hyper(p, &maxread);
3693                 if (maxread > 0x7FFFFFFF)
3694                         maxread = 0x7FFFFFFF;
3695                 *res = (uint32_t)maxread;
3696                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3697         }
3698         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3699         return status;
3700 out_overflow:
3701         print_overflow_msg(__func__, xdr);
3702         return -EIO;
3703 }
3704
3705 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3706 {
3707         __be32 *p;
3708         int status = 0;
3709
3710         *res = 1024;
3711         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3712                 return -EIO;
3713         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3714                 uint64_t maxwrite;
3715                 p = xdr_inline_decode(xdr, 8);
3716                 if (unlikely(!p))
3717                         goto out_overflow;
3718                 xdr_decode_hyper(p, &maxwrite);
3719                 if (maxwrite > 0x7FFFFFFF)
3720                         maxwrite = 0x7FFFFFFF;
3721                 *res = (uint32_t)maxwrite;
3722                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3723         }
3724         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3725         return status;
3726 out_overflow:
3727         print_overflow_msg(__func__, xdr);
3728         return -EIO;
3729 }
3730
3731 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3732 {
3733         uint32_t tmp;
3734         __be32 *p;
3735         int ret = 0;
3736
3737         *mode = 0;
3738         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3739                 return -EIO;
3740         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3741                 p = xdr_inline_decode(xdr, 4);
3742                 if (unlikely(!p))
3743                         goto out_overflow;
3744                 tmp = be32_to_cpup(p);
3745                 *mode = tmp & ~S_IFMT;
3746                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3747                 ret = NFS_ATTR_FATTR_MODE;
3748         }
3749         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3750         return ret;
3751 out_overflow:
3752         print_overflow_msg(__func__, xdr);
3753         return -EIO;
3754 }
3755
3756 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3757 {
3758         __be32 *p;
3759         int ret = 0;
3760
3761         *nlink = 1;
3762         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3763                 return -EIO;
3764         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3765                 p = xdr_inline_decode(xdr, 4);
3766                 if (unlikely(!p))
3767                         goto out_overflow;
3768                 *nlink = be32_to_cpup(p);
3769                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3770                 ret = NFS_ATTR_FATTR_NLINK;
3771         }
3772         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3773         return ret;
3774 out_overflow:
3775         print_overflow_msg(__func__, xdr);
3776         return -EIO;
3777 }
3778
3779 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3780                 const struct nfs_server *server, kuid_t *uid,
3781                 struct nfs4_string *owner_name)
3782 {
3783         uint32_t len;
3784         __be32 *p;
3785         int ret = 0;
3786
3787         *uid = make_kuid(&init_user_ns, -2);
3788         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3789                 return -EIO;
3790         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3791                 p = xdr_inline_decode(xdr, 4);
3792                 if (unlikely(!p))
3793                         goto out_overflow;
3794                 len = be32_to_cpup(p);
3795                 p = xdr_inline_decode(xdr, len);
3796                 if (unlikely(!p))
3797                         goto out_overflow;
3798                 if (owner_name != NULL) {
3799                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3800                         if (owner_name->data != NULL) {
3801                                 owner_name->len = len;
3802                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3803                         }
3804                 } else if (len < XDR_MAX_NETOBJ) {
3805                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3806                                 ret = NFS_ATTR_FATTR_OWNER;
3807                         else
3808                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3809                                                 __func__);
3810                 } else
3811                         dprintk("%s: name too long (%u)!\n",
3812                                         __func__, len);
3813                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3814         }
3815         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3816         return ret;
3817 out_overflow:
3818         print_overflow_msg(__func__, xdr);
3819         return -EIO;
3820 }
3821
3822 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3823                 const struct nfs_server *server, kgid_t *gid,
3824                 struct nfs4_string *group_name)
3825 {
3826         uint32_t len;
3827         __be32 *p;
3828         int ret = 0;
3829
3830         *gid = make_kgid(&init_user_ns, -2);
3831         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3832                 return -EIO;
3833         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3834                 p = xdr_inline_decode(xdr, 4);
3835                 if (unlikely(!p))
3836                         goto out_overflow;
3837                 len = be32_to_cpup(p);
3838                 p = xdr_inline_decode(xdr, len);
3839                 if (unlikely(!p))
3840                         goto out_overflow;
3841                 if (group_name != NULL) {
3842                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3843                         if (group_name->data != NULL) {
3844                                 group_name->len = len;
3845                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3846                         }
3847                 } else if (len < XDR_MAX_NETOBJ) {
3848                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3849                                 ret = NFS_ATTR_FATTR_GROUP;
3850                         else
3851                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3852                                                 __func__);
3853                 } else
3854                         dprintk("%s: name too long (%u)!\n",
3855                                         __func__, len);
3856                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3857         }
3858         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3859         return ret;
3860 out_overflow:
3861         print_overflow_msg(__func__, xdr);
3862         return -EIO;
3863 }
3864
3865 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3866 {
3867         uint32_t major = 0, minor = 0;
3868         __be32 *p;
3869         int ret = 0;
3870
3871         *rdev = MKDEV(0,0);
3872         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3873                 return -EIO;
3874         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3875                 dev_t tmp;
3876
3877                 p = xdr_inline_decode(xdr, 8);
3878                 if (unlikely(!p))
3879                         goto out_overflow;
3880                 major = be32_to_cpup(p++);
3881                 minor = be32_to_cpup(p);
3882                 tmp = MKDEV(major, minor);
3883                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3884                         *rdev = tmp;
3885                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3886                 ret = NFS_ATTR_FATTR_RDEV;
3887         }
3888         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3889         return ret;
3890 out_overflow:
3891         print_overflow_msg(__func__, xdr);
3892         return -EIO;
3893 }
3894
3895 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3896 {
3897         __be32 *p;
3898         int status = 0;
3899
3900         *res = 0;
3901         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3902                 return -EIO;
3903         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3904                 p = xdr_inline_decode(xdr, 8);
3905                 if (unlikely(!p))
3906                         goto out_overflow;
3907                 xdr_decode_hyper(p, res);
3908                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3909         }
3910         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3911         return status;
3912 out_overflow:
3913         print_overflow_msg(__func__, xdr);
3914         return -EIO;
3915 }
3916
3917 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3918 {
3919         __be32 *p;
3920         int status = 0;
3921
3922         *res = 0;
3923         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3924                 return -EIO;
3925         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3926                 p = xdr_inline_decode(xdr, 8);
3927                 if (unlikely(!p))
3928                         goto out_overflow;
3929                 xdr_decode_hyper(p, res);
3930                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3931         }
3932         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3933         return status;
3934 out_overflow:
3935         print_overflow_msg(__func__, xdr);
3936         return -EIO;
3937 }
3938
3939 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3940 {
3941         __be32 *p;
3942         int status = 0;
3943
3944         *res = 0;
3945         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3946                 return -EIO;
3947         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3948                 p = xdr_inline_decode(xdr, 8);
3949                 if (unlikely(!p))
3950                         goto out_overflow;
3951                 xdr_decode_hyper(p, res);
3952                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3953         }
3954         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3955         return status;
3956 out_overflow:
3957         print_overflow_msg(__func__, xdr);
3958         return -EIO;
3959 }
3960
3961 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3962 {
3963         __be32 *p;
3964         int ret = 0;
3965
3966         *used = 0;
3967         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3968                 return -EIO;
3969         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3970                 p = xdr_inline_decode(xdr, 8);
3971                 if (unlikely(!p))
3972                         goto out_overflow;
3973                 xdr_decode_hyper(p, used);
3974                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3975                 ret = NFS_ATTR_FATTR_SPACE_USED;
3976         }
3977         dprintk("%s: space used=%Lu\n", __func__,
3978                         (unsigned long long)*used);
3979         return ret;
3980 out_overflow:
3981         print_overflow_msg(__func__, xdr);
3982         return -EIO;
3983 }
3984
3985 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3986 {
3987         __be32 *p;
3988         uint64_t sec;
3989         uint32_t nsec;
3990
3991         p = xdr_inline_decode(xdr, 12);
3992         if (unlikely(!p))
3993                 goto out_overflow;
3994         p = xdr_decode_hyper(p, &sec);
3995         nsec = be32_to_cpup(p);
3996         time->tv_sec = (time_t)sec;
3997         time->tv_nsec = (long)nsec;
3998         return 0;
3999 out_overflow:
4000         print_overflow_msg(__func__, xdr);
4001         return -EIO;
4002 }
4003
4004 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4005 {
4006         int status = 0;
4007
4008         time->tv_sec = 0;
4009         time->tv_nsec = 0;
4010         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4011                 return -EIO;
4012         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4013                 status = decode_attr_time(xdr, time);
4014                 if (status == 0)
4015                         status = NFS_ATTR_FATTR_ATIME;
4016                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4017         }
4018         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4019         return status;
4020 }
4021
4022 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4023 {
4024         int status = 0;
4025
4026         time->tv_sec = 0;
4027         time->tv_nsec = 0;
4028         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4029                 return -EIO;
4030         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4031                 status = decode_attr_time(xdr, time);
4032                 if (status == 0)
4033                         status = NFS_ATTR_FATTR_CTIME;
4034                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4035         }
4036         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4037         return status;
4038 }
4039
4040 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4041                                   struct timespec *time)
4042 {
4043         int status = 0;
4044
4045         time->tv_sec = 0;
4046         time->tv_nsec = 0;
4047         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4048                 return -EIO;
4049         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4050                 status = decode_attr_time(xdr, time);
4051                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4052         }
4053         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4054                 (long)time->tv_nsec);
4055         return status;
4056 }
4057
4058 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4059 {
4060         int status = 0;
4061
4062         time->tv_sec = 0;
4063         time->tv_nsec = 0;
4064         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4065                 return -EIO;
4066         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4067                 status = decode_attr_time(xdr, time);
4068                 if (status == 0)
4069                         status = NFS_ATTR_FATTR_MTIME;
4070                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4071         }
4072         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4073         return status;
4074 }
4075
4076 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4077 {
4078         unsigned int attrwords = XDR_QUADLEN(attrlen);
4079         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4080
4081         if (unlikely(attrwords != nwords)) {
4082                 dprintk("%s: server returned incorrect attribute length: "
4083                         "%u %c %u\n",
4084                                 __func__,
4085                                 attrwords << 2,
4086                                 (attrwords < nwords) ? '<' : '>',
4087                                 nwords << 2);
4088                 return -EIO;
4089         }
4090         return 0;
4091 }
4092
4093 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4094 {
4095         __be32 *p;
4096
4097         p = xdr_inline_decode(xdr, 20);
4098         if (unlikely(!p))
4099                 goto out_overflow;
4100         cinfo->atomic = be32_to_cpup(p++);
4101         p = xdr_decode_hyper(p, &cinfo->before);
4102         xdr_decode_hyper(p, &cinfo->after);
4103         return 0;
4104 out_overflow:
4105         print_overflow_msg(__func__, xdr);
4106         return -EIO;
4107 }
4108
4109 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4110 {
4111         __be32 *p;
4112         uint32_t supp, acc;
4113         int status;
4114
4115         status = decode_op_hdr(xdr, OP_ACCESS);
4116         if (status)
4117                 return status;
4118         p = xdr_inline_decode(xdr, 8);
4119         if (unlikely(!p))
4120                 goto out_overflow;
4121         supp = be32_to_cpup(p++);
4122         acc = be32_to_cpup(p);
4123         *supported = supp;
4124         *access = acc;
4125         return 0;
4126 out_overflow:
4127         print_overflow_msg(__func__, xdr);
4128         return -EIO;
4129 }
4130
4131 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4132 {
4133         __be32 *p;
4134
4135         p = xdr_inline_decode(xdr, len);
4136         if (likely(p)) {
4137                 memcpy(buf, p, len);
4138                 return 0;
4139         }
4140         print_overflow_msg(__func__, xdr);
4141         return -EIO;
4142 }
4143
4144 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4145 {
4146         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4147 }
4148
4149 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4150 {
4151         int status;
4152
4153         status = decode_op_hdr(xdr, OP_CLOSE);
4154         if (status != -EIO)
4155                 nfs_increment_open_seqid(status, res->seqid);
4156         if (!status)
4157                 status = decode_stateid(xdr, &res->stateid);
4158         return status;
4159 }
4160
4161 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4162 {
4163         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4164 }
4165
4166 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4167 {
4168         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4169 }
4170
4171 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4172 {
4173         int status;
4174
4175         status = decode_op_hdr(xdr, OP_COMMIT);
4176         if (!status)
4177                 status = decode_write_verifier(xdr, &res->verf->verifier);
4178         return status;
4179 }
4180
4181 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4182 {
4183         __be32 *p;
4184         uint32_t bmlen;
4185         int status;
4186
4187         status = decode_op_hdr(xdr, OP_CREATE);
4188         if (status)
4189                 return status;
4190         if ((status = decode_change_info(xdr, cinfo)))
4191                 return status;
4192         p = xdr_inline_decode(xdr, 4);
4193         if (unlikely(!p))
4194                 goto out_overflow;
4195         bmlen = be32_to_cpup(p);
4196         p = xdr_inline_decode(xdr, bmlen << 2);
4197         if (likely(p))
4198                 return 0;
4199 out_overflow:
4200         print_overflow_msg(__func__, xdr);
4201         return -EIO;
4202 }
4203
4204 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4205 {
4206         unsigned int savep;
4207         uint32_t attrlen, bitmap[3] = {0};
4208         int status;
4209
4210         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4219                                                  &res->fh_expire_type)) != 0)
4220                 goto xdr_error;
4221         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4222                 goto xdr_error;
4223         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4224                 goto xdr_error;
4225         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4226                 goto xdr_error;
4227         status = verify_attr_len(xdr, savep, attrlen);
4228 xdr_error:
4229         dprintk("%s: xdr returned %d!\n", __func__, -status);
4230         return status;
4231 }
4232
4233 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4234 {
4235         unsigned int savep;
4236         uint32_t attrlen, bitmap[3] = {0};
4237         int status;
4238
4239         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4240                 goto xdr_error;
4241         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4244                 goto xdr_error;
4245
4246         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4247                 goto xdr_error;
4248         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4249                 goto xdr_error;
4250         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4251                 goto xdr_error;
4252         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4253                 goto xdr_error;
4254         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4255                 goto xdr_error;
4256         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4257                 goto xdr_error;
4258
4259         status = verify_attr_len(xdr, savep, attrlen);
4260 xdr_error:
4261         dprintk("%s: xdr returned %d!\n", __func__, -status);
4262         return status;
4263 }
4264
4265 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4266 {
4267         unsigned int savep;
4268         uint32_t attrlen, bitmap[3] = {0};
4269         int status;
4270
4271         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4272                 goto xdr_error;
4273         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4274                 goto xdr_error;
4275         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4276                 goto xdr_error;
4277
4278         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4279                 goto xdr_error;
4280         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4281                 goto xdr_error;
4282
4283         status = verify_attr_len(xdr, savep, attrlen);
4284 xdr_error:
4285         dprintk("%s: xdr returned %d!\n", __func__, -status);
4286         return status;
4287 }
4288
4289 static int decode_threshold_hint(struct xdr_stream *xdr,
4290                                   uint32_t *bitmap,
4291                                   uint64_t *res,
4292                                   uint32_t hint_bit)
4293 {
4294         __be32 *p;
4295
4296         *res = 0;
4297         if (likely(bitmap[0] & hint_bit)) {
4298                 p = xdr_inline_decode(xdr, 8);
4299                 if (unlikely(!p))
4300                         goto out_overflow;
4301                 xdr_decode_hyper(p, res);
4302         }
4303         return 0;
4304 out_overflow:
4305         print_overflow_msg(__func__, xdr);
4306         return -EIO;
4307 }
4308
4309 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4310                                         struct nfs4_threshold *res)
4311 {
4312         __be32 *p;
4313         unsigned int savep;
4314         uint32_t bitmap[3] = {0,}, attrlen;
4315         int status;
4316
4317         /* layout type */
4318         p = xdr_inline_decode(xdr, 4);
4319         if (unlikely(!p)) {
4320                 print_overflow_msg(__func__, xdr);
4321                 return -EIO;
4322         }
4323         res->l_type = be32_to_cpup(p);
4324
4325         /* thi_hintset bitmap */
4326         status = decode_attr_bitmap(xdr, bitmap);
4327         if (status < 0)
4328                 goto xdr_error;
4329
4330         /* thi_hintlist length */
4331         status = decode_attr_length(xdr, &attrlen, &savep);
4332         if (status < 0)
4333                 goto xdr_error;
4334         /* thi_hintlist */
4335         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4336         if (status < 0)
4337                 goto xdr_error;
4338         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4339         if (status < 0)
4340                 goto xdr_error;
4341         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4342                                        THRESHOLD_RD_IO);
4343         if (status < 0)
4344                 goto xdr_error;
4345         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4346                                        THRESHOLD_WR_IO);
4347         if (status < 0)
4348                 goto xdr_error;
4349
4350         status = verify_attr_len(xdr, savep, attrlen);
4351         res->bm = bitmap[0];
4352
4353         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4354                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4355                 res->wr_io_sz);
4356 xdr_error:
4357         dprintk("%s ret=%d!\n", __func__, status);
4358         return status;
4359 }
4360
4361 /*
4362  * Thresholds on pNFS direct I/O vrs MDS I/O
4363  */
4364 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4365                                     uint32_t *bitmap,
4366                                     struct nfs4_threshold *res)
4367 {
4368         __be32 *p;
4369         int status = 0;
4370         uint32_t num;
4371
4372         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4373                 return -EIO;
4374         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4375                 /* Did the server return an unrequested attribute? */
4376                 if (unlikely(res == NULL))
4377                         return -EREMOTEIO;
4378                 p = xdr_inline_decode(xdr, 4);
4379                 if (unlikely(!p))
4380                         goto out_overflow;
4381                 num = be32_to_cpup(p);
4382                 if (num == 0)
4383                         return 0;
4384                 if (num > 1)
4385                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4386                                 "drivers per filesystem not supported\n",
4387                                 __func__);
4388
4389                 status = decode_first_threshold_item4(xdr, res);
4390                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4391         }
4392         return status;
4393 out_overflow:
4394         print_overflow_msg(__func__, xdr);
4395         return -EIO;
4396 }
4397
4398 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4399                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4400                 struct nfs4_fs_locations *fs_loc,
4401                 const struct nfs_server *server)
4402 {
4403         int status;
4404         umode_t fmode = 0;
4405         uint32_t type;
4406         int32_t err;
4407
4408         status = decode_attr_type(xdr, bitmap, &type);
4409         if (status < 0)
4410                 goto xdr_error;
4411         fattr->mode = 0;
4412         if (status != 0) {
4413                 fattr->mode |= nfs_type2fmt[type];
4414                 fattr->valid |= status;
4415         }
4416
4417         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4418         if (status < 0)
4419                 goto xdr_error;
4420         fattr->valid |= status;
4421
4422         status = decode_attr_size(xdr, bitmap, &fattr->size);
4423         if (status < 0)
4424                 goto xdr_error;
4425         fattr->valid |= status;
4426
4427         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4428         if (status < 0)
4429                 goto xdr_error;
4430         fattr->valid |= status;
4431
4432         err = 0;
4433         status = decode_attr_error(xdr, bitmap, &err);
4434         if (status < 0)
4435                 goto xdr_error;
4436
4437         status = decode_attr_filehandle(xdr, bitmap, fh);
4438         if (status < 0)
4439                 goto xdr_error;
4440
4441         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4442         if (status < 0)
4443                 goto xdr_error;
4444         fattr->valid |= status;
4445
4446         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4447         if (status < 0)
4448                 goto xdr_error;
4449         fattr->valid |= status;
4450
4451         status = decode_attr_mode(xdr, bitmap, &fmode);
4452         if (status < 0)
4453                 goto xdr_error;
4454         if (status != 0) {
4455                 fattr->mode |= fmode;
4456                 fattr->valid |= status;
4457         }
4458
4459         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4460         if (status < 0)
4461                 goto xdr_error;
4462         fattr->valid |= status;
4463
4464         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4465         if (status < 0)
4466                 goto xdr_error;
4467         fattr->valid |= status;
4468
4469         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4470         if (status < 0)
4471                 goto xdr_error;
4472         fattr->valid |= status;
4473
4474         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4475         if (status < 0)
4476                 goto xdr_error;
4477         fattr->valid |= status;
4478
4479         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4480         if (status < 0)
4481                 goto xdr_error;
4482         fattr->valid |= status;
4483
4484         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4485         if (status < 0)
4486                 goto xdr_error;
4487         fattr->valid |= status;
4488
4489         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4490         if (status < 0)
4491                 goto xdr_error;
4492         fattr->valid |= status;
4493
4494         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4495         if (status < 0)
4496                 goto xdr_error;
4497         fattr->valid |= status;
4498
4499         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4500         if (status < 0)
4501                 goto xdr_error;
4502         fattr->valid |= status;
4503
4504         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4505         if (status < 0)
4506                 goto xdr_error;
4507
4508 xdr_error:
4509         dprintk("%s: xdr returned %d\n", __func__, -status);
4510         return status;
4511 }
4512
4513 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4514                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4515                 const struct nfs_server *server)
4516 {
4517         unsigned int savep;
4518         uint32_t attrlen,
4519                  bitmap[3] = {0};
4520         int status;
4521
4522         status = decode_op_hdr(xdr, OP_GETATTR);
4523         if (status < 0)
4524                 goto xdr_error;
4525
4526         status = decode_attr_bitmap(xdr, bitmap);
4527         if (status < 0)
4528                 goto xdr_error;
4529
4530         status = decode_attr_length(xdr, &attrlen, &savep);
4531         if (status < 0)
4532                 goto xdr_error;
4533
4534         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4535         if (status < 0)
4536                 goto xdr_error;
4537
4538         status = verify_attr_len(xdr, savep, attrlen);
4539 xdr_error:
4540         dprintk("%s: xdr returned %d\n", __func__, -status);
4541         return status;
4542 }
4543
4544 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4545                 const struct nfs_server *server)
4546 {
4547         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4548 }
4549
4550 /*
4551  * Decode potentially multiple layout types. Currently we only support
4552  * one layout driver per file system.
4553  */
4554 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4555                                          uint32_t *layouttype)
4556 {
4557         uint32_t *p;
4558         int num;
4559
4560         p = xdr_inline_decode(xdr, 4);
4561         if (unlikely(!p))
4562                 goto out_overflow;
4563         num = be32_to_cpup(p);
4564
4565         /* pNFS is not supported by the underlying file system */
4566         if (num == 0) {
4567                 *layouttype = 0;
4568                 return 0;
4569         }
4570         if (num > 1)
4571                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4572                         "drivers per filesystem not supported\n", __func__);
4573
4574         /* Decode and set first layout type, move xdr->p past unused types */
4575         p = xdr_inline_decode(xdr, num * 4);
4576         if (unlikely(!p))
4577                 goto out_overflow;
4578         *layouttype = be32_to_cpup(p);
4579         return 0;
4580 out_overflow:
4581         print_overflow_msg(__func__, xdr);
4582         return -EIO;
4583 }
4584
4585 /*
4586  * The type of file system exported.
4587  * Note we must ensure that layouttype is set in any non-error case.
4588  */
4589 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4590                                 uint32_t *layouttype)
4591 {
4592         int status = 0;
4593
4594         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4595         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4596                 return -EIO;
4597         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4598                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4599                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4600         } else
4601                 *layouttype = 0;
4602         return status;
4603 }
4604
4605 /*
4606  * The prefered block size for layout directed io
4607  */
4608 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4609                                       uint32_t *res)
4610 {
4611         __be32 *p;
4612
4613         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4614         *res = 0;
4615         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4616                 p = xdr_inline_decode(xdr, 4);
4617                 if (unlikely(!p)) {
4618                         print_overflow_msg(__func__, xdr);
4619                         return -EIO;
4620                 }
4621                 *res = be32_to_cpup(p);
4622                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4623         }
4624         return 0;
4625 }
4626
4627 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4628 {
4629         unsigned int savep;
4630         uint32_t attrlen, bitmap[3];
4631         int status;
4632
4633         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4634                 goto xdr_error;
4635         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4636                 goto xdr_error;
4637         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4638                 goto xdr_error;
4639
4640         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4641
4642         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4643                 goto xdr_error;
4644         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4645                 goto xdr_error;
4646         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4647                 goto xdr_error;
4648         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4649         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4650                 goto xdr_error;
4651         fsinfo->wtpref = fsinfo->wtmax;
4652         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4653         if (status != 0)
4654                 goto xdr_error;
4655         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4656         if (status != 0)
4657                 goto xdr_error;
4658         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4659         if (status)
4660                 goto xdr_error;
4661
4662         status = verify_attr_len(xdr, savep, attrlen);
4663 xdr_error:
4664         dprintk("%s: xdr returned %d!\n", __func__, -status);
4665         return status;
4666 }
4667
4668 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4669 {
4670         __be32 *p;
4671         uint32_t len;
4672         int status;
4673
4674         /* Zero handle first to allow comparisons */
4675         memset(fh, 0, sizeof(*fh));
4676
4677         status = decode_op_hdr(xdr, OP_GETFH);
4678         if (status)
4679                 return status;
4680
4681         p = xdr_inline_decode(xdr, 4);
4682         if (unlikely(!p))
4683                 goto out_overflow;
4684         len = be32_to_cpup(p);
4685         if (len > NFS4_FHSIZE)
4686                 return -EIO;
4687         fh->size = len;
4688         p = xdr_inline_decode(xdr, len);
4689         if (unlikely(!p))
4690                 goto out_overflow;
4691         memcpy(fh->data, p, len);
4692         return 0;
4693 out_overflow:
4694         print_overflow_msg(__func__, xdr);
4695         return -EIO;
4696 }
4697
4698 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4699 {
4700         int status;
4701
4702         status = decode_op_hdr(xdr, OP_LINK);
4703         if (status)
4704                 return status;
4705         return decode_change_info(xdr, cinfo);
4706 }
4707
4708 /*
4709  * We create the owner, so we know a proper owner.id length is 4.
4710  */
4711 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4712 {
4713         uint64_t offset, length, clientid;
4714         __be32 *p;
4715         uint32_t namelen, type;
4716
4717         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4718         if (unlikely(!p))
4719                 goto out_overflow;
4720         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4721         p = xdr_decode_hyper(p, &length);
4722         type = be32_to_cpup(p++); /* 4 byte read */
4723         if (fl != NULL) { /* manipulate file lock */
4724                 fl->fl_start = (loff_t)offset;
4725                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4726                 if (length == ~(uint64_t)0)
4727                         fl->fl_end = OFFSET_MAX;
4728                 fl->fl_type = F_WRLCK;
4729                 if (type & 1)
4730                         fl->fl_type = F_RDLCK;
4731                 fl->fl_pid = 0;
4732         }
4733         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4734         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4735         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4736         if (likely(p))
4737                 return -NFS4ERR_DENIED;
4738 out_overflow:
4739         print_overflow_msg(__func__, xdr);
4740         return -EIO;
4741 }
4742
4743 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4744 {
4745         int status;
4746
4747         status = decode_op_hdr(xdr, OP_LOCK);
4748         if (status == -EIO)
4749                 goto out;
4750         if (status == 0) {
4751                 status = decode_stateid(xdr, &res->stateid);
4752                 if (unlikely(status))
4753                         goto out;
4754         } else if (status == -NFS4ERR_DENIED)
4755                 status = decode_lock_denied(xdr, NULL);
4756         if (res->open_seqid != NULL)
4757                 nfs_increment_open_seqid(status, res->open_seqid);
4758         nfs_increment_lock_seqid(status, res->lock_seqid);
4759 out:
4760         return status;
4761 }
4762
4763 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4764 {
4765         int status;
4766         status = decode_op_hdr(xdr, OP_LOCKT);
4767         if (status == -NFS4ERR_DENIED)
4768                 return decode_lock_denied(xdr, res->denied);
4769         return status;
4770 }
4771
4772 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4773 {
4774         int status;
4775
4776         status = decode_op_hdr(xdr, OP_LOCKU);
4777         if (status != -EIO)
4778                 nfs_increment_lock_seqid(status, res->seqid);
4779         if (status == 0)
4780                 status = decode_stateid(xdr, &res->stateid);
4781         return status;
4782 }
4783
4784 static int decode_release_lockowner(struct xdr_stream *xdr)
4785 {
4786         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4787 }
4788
4789 static int decode_lookup(struct xdr_stream *xdr)
4790 {
4791         return decode_op_hdr(xdr, OP_LOOKUP);
4792 }
4793
4794 /* This is too sick! */
4795 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4796 {
4797         __be32 *p;
4798         uint32_t limit_type, nblocks, blocksize;
4799
4800         p = xdr_inline_decode(xdr, 12);
4801         if (unlikely(!p))
4802                 goto out_overflow;
4803         limit_type = be32_to_cpup(p++);
4804         switch (limit_type) {
4805         case 1:
4806                 xdr_decode_hyper(p, maxsize);
4807                 break;
4808         case 2:
4809                 nblocks = be32_to_cpup(p++);
4810                 blocksize = be32_to_cpup(p);
4811                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4812         }
4813         return 0;
4814 out_overflow:
4815         print_overflow_msg(__func__, xdr);
4816         return -EIO;
4817 }
4818
4819 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4820 {
4821         __be32 *p;
4822         uint32_t delegation_type;
4823         int status;
4824
4825         p = xdr_inline_decode(xdr, 4);
4826         if (unlikely(!p))
4827                 goto out_overflow;
4828         delegation_type = be32_to_cpup(p);
4829         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4830                 res->delegation_type = 0;
4831                 return 0;
4832         }
4833         status = decode_stateid(xdr, &res->delegation);
4834         if (unlikely(status))
4835                 return status;
4836         p = xdr_inline_decode(xdr, 4);
4837         if (unlikely(!p))
4838                 goto out_overflow;
4839         res->do_recall = be32_to_cpup(p);
4840
4841         switch (delegation_type) {
4842         case NFS4_OPEN_DELEGATE_READ:
4843                 res->delegation_type = FMODE_READ;
4844                 break;
4845         case NFS4_OPEN_DELEGATE_WRITE:
4846                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4847                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4848                                 return -EIO;
4849         }
4850         return decode_ace(xdr, NULL, res->server->nfs_client);
4851 out_overflow:
4852         print_overflow_msg(__func__, xdr);
4853         return -EIO;
4854 }
4855
4856 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4857 {
4858         __be32 *p;
4859         uint32_t savewords, bmlen, i;
4860         int status;
4861
4862         status = decode_op_hdr(xdr, OP_OPEN);
4863         if (status != -EIO)
4864                 nfs_increment_open_seqid(status, res->seqid);
4865         if (!status)
4866                 status = decode_stateid(xdr, &res->stateid);
4867         if (unlikely(status))
4868                 return status;
4869
4870         decode_change_info(xdr, &res->cinfo);
4871
4872         p = xdr_inline_decode(xdr, 8);
4873         if (unlikely(!p))
4874                 goto out_overflow;
4875         res->rflags = be32_to_cpup(p++);
4876         bmlen = be32_to_cpup(p);
4877         if (bmlen > 10)
4878                 goto xdr_error;
4879
4880         p = xdr_inline_decode(xdr, bmlen << 2);
4881         if (unlikely(!p))
4882                 goto out_overflow;
4883         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4884         for (i = 0; i < savewords; ++i)
4885                 res->attrset[i] = be32_to_cpup(p++);
4886         for (; i < NFS4_BITMAP_SIZE; i++)
4887                 res->attrset[i] = 0;
4888
4889         return decode_delegation(xdr, res);
4890 xdr_error:
4891         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4892         return -EIO;
4893 out_overflow:
4894         print_overflow_msg(__func__, xdr);
4895         return -EIO;
4896 }
4897
4898 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4899 {
4900         int status;
4901
4902         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4903         if (status != -EIO)
4904                 nfs_increment_open_seqid(status, res->seqid);
4905         if (!status)
4906                 status = decode_stateid(xdr, &res->stateid);
4907         return status;
4908 }
4909
4910 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4911 {
4912         int status;
4913
4914         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4915         if (status != -EIO)
4916                 nfs_increment_open_seqid(status, res->seqid);
4917         if (!status)
4918                 status = decode_stateid(xdr, &res->stateid);
4919         return status;
4920 }
4921
4922 static int decode_putfh(struct xdr_stream *xdr)
4923 {
4924         return decode_op_hdr(xdr, OP_PUTFH);
4925 }
4926
4927 static int decode_putrootfh(struct xdr_stream *xdr)
4928 {
4929         return decode_op_hdr(xdr, OP_PUTROOTFH);
4930 }
4931
4932 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4933 {
4934         __be32 *p;
4935         uint32_t count, eof, recvd;
4936         int status;
4937
4938         status = decode_op_hdr(xdr, OP_READ);
4939         if (status)
4940                 return status;
4941         p = xdr_inline_decode(xdr, 8);
4942         if (unlikely(!p))
4943                 goto out_overflow;
4944         eof = be32_to_cpup(p++);
4945         count = be32_to_cpup(p);
4946         recvd = xdr_read_pages(xdr, count);
4947         if (count > recvd) {
4948                 dprintk("NFS: server cheating in read reply: "
4949                                 "count %u > recvd %u\n", count, recvd);
4950                 count = recvd;
4951                 eof = 0;
4952         }
4953         res->eof = eof;
4954         res->count = count;
4955         return 0;
4956 out_overflow:
4957         print_overflow_msg(__func__, xdr);
4958         return -EIO;
4959 }
4960
4961 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4962 {
4963         int             status;
4964         __be32          verf[2];
4965
4966         status = decode_op_hdr(xdr, OP_READDIR);
4967         if (!status)
4968                 status = decode_verifier(xdr, readdir->verifier.data);
4969         if (unlikely(status))
4970                 return status;
4971         memcpy(verf, readdir->verifier.data, sizeof(verf));
4972         dprintk("%s: verifier = %08x:%08x\n",
4973                         __func__, verf[0], verf[1]);
4974         return xdr_read_pages(xdr, xdr->buf->page_len);
4975 }
4976
4977 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4978 {
4979         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4980         u32 len, recvd;
4981         __be32 *p;
4982         int status;
4983
4984         status = decode_op_hdr(xdr, OP_READLINK);
4985         if (status)
4986                 return status;
4987
4988         /* Convert length of symlink */
4989         p = xdr_inline_decode(xdr, 4);
4990         if (unlikely(!p))
4991                 goto out_overflow;
4992         len = be32_to_cpup(p);
4993         if (len >= rcvbuf->page_len || len <= 0) {
4994                 dprintk("nfs: server returned giant symlink!\n");
4995                 return -ENAMETOOLONG;
4996         }
4997         recvd = xdr_read_pages(xdr, len);
4998         if (recvd < len) {
4999                 dprintk("NFS: server cheating in readlink reply: "
5000                                 "count %u > recvd %u\n", len, recvd);
5001                 return -EIO;
5002         }
5003         /*
5004          * The XDR encode routine has set things up so that
5005          * the link text will be copied directly into the
5006          * buffer.  We just have to do overflow-checking,
5007          * and and null-terminate the text (the VFS expects
5008          * null-termination).
5009          */
5010         xdr_terminate_string(rcvbuf, len);
5011         return 0;
5012 out_overflow:
5013         print_overflow_msg(__func__, xdr);
5014         return -EIO;
5015 }
5016
5017 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5018 {
5019         int status;
5020
5021         status = decode_op_hdr(xdr, OP_REMOVE);
5022         if (status)
5023                 goto out;
5024         status = decode_change_info(xdr, cinfo);
5025 out:
5026         return status;
5027 }
5028
5029 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5030               struct nfs4_change_info *new_cinfo)
5031 {
5032         int status;
5033
5034         status = decode_op_hdr(xdr, OP_RENAME);
5035         if (status)
5036                 goto out;
5037         if ((status = decode_change_info(xdr, old_cinfo)))
5038                 goto out;
5039         status = decode_change_info(xdr, new_cinfo);
5040 out:
5041         return status;
5042 }
5043
5044 static int decode_renew(struct xdr_stream *xdr)
5045 {
5046         return decode_op_hdr(xdr, OP_RENEW);
5047 }
5048
5049 static int
5050 decode_restorefh(struct xdr_stream *xdr)
5051 {
5052         return decode_op_hdr(xdr, OP_RESTOREFH);
5053 }
5054
5055 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5056                          struct nfs_getaclres *res)
5057 {
5058         unsigned int savep;
5059         uint32_t attrlen,
5060                  bitmap[3] = {0};
5061         int status;
5062         unsigned int pg_offset;
5063
5064         res->acl_len = 0;
5065         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5066                 goto out;
5067
5068         xdr_enter_page(xdr, xdr->buf->page_len);
5069
5070         /* Calculate the offset of the page data */
5071         pg_offset = xdr->buf->head[0].iov_len;
5072
5073         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5074                 goto out;
5075         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5076                 goto out;
5077
5078         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5079                 return -EIO;
5080         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5081
5082                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5083                  * are stored with the acl data to handle the problem of
5084                  * variable length bitmaps.*/
5085                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5086                 res->acl_len = attrlen;
5087
5088                 /* Check for receive buffer overflow */
5089                 if (res->acl_len > (xdr->nwords << 2) ||
5090                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5091                         res->acl_flags |= NFS4_ACL_TRUNC;
5092                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5093                                         attrlen, xdr->nwords << 2);
5094                 }
5095         } else
5096                 status = -EOPNOTSUPP;
5097
5098 out:
5099         return status;
5100 }
5101
5102 static int
5103 decode_savefh(struct xdr_stream *xdr)
5104 {
5105         return decode_op_hdr(xdr, OP_SAVEFH);
5106 }
5107
5108 static int decode_setattr(struct xdr_stream *xdr)
5109 {
5110         __be32 *p;
5111         uint32_t bmlen;
5112         int status;
5113
5114         status = decode_op_hdr(xdr, OP_SETATTR);
5115         if (status)
5116                 return status;
5117         p = xdr_inline_decode(xdr, 4);
5118         if (unlikely(!p))
5119                 goto out_overflow;
5120         bmlen = be32_to_cpup(p);
5121         p = xdr_inline_decode(xdr, bmlen << 2);
5122         if (likely(p))
5123                 return 0;
5124 out_overflow:
5125         print_overflow_msg(__func__, xdr);
5126         return -EIO;
5127 }
5128
5129 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5130 {
5131         __be32 *p;
5132         uint32_t opnum;
5133         int32_t nfserr;
5134
5135         p = xdr_inline_decode(xdr, 8);
5136         if (unlikely(!p))
5137                 goto out_overflow;
5138         opnum = be32_to_cpup(p++);
5139         if (opnum != OP_SETCLIENTID) {
5140                 dprintk("nfs: decode_setclientid: Server returned operation"
5141                         " %d\n", opnum);
5142                 return -EIO;
5143         }
5144         nfserr = be32_to_cpup(p);
5145         if (nfserr == NFS_OK) {
5146                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5147                 if (unlikely(!p))
5148                         goto out_overflow;
5149                 p = xdr_decode_hyper(p, &res->clientid);
5150                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5151         } else if (nfserr == NFSERR_CLID_INUSE) {
5152                 uint32_t len;
5153
5154                 /* skip netid string */
5155                 p = xdr_inline_decode(xdr, 4);
5156                 if (unlikely(!p))
5157                         goto out_overflow;
5158                 len = be32_to_cpup(p);
5159                 p = xdr_inline_decode(xdr, len);
5160                 if (unlikely(!p))
5161                         goto out_overflow;
5162
5163                 /* skip uaddr string */
5164                 p = xdr_inline_decode(xdr, 4);
5165                 if (unlikely(!p))
5166                         goto out_overflow;
5167                 len = be32_to_cpup(p);
5168                 p = xdr_inline_decode(xdr, len);
5169                 if (unlikely(!p))
5170                         goto out_overflow;
5171                 return -NFSERR_CLID_INUSE;
5172         } else
5173                 return nfs4_stat_to_errno(nfserr);
5174
5175         return 0;
5176 out_overflow:
5177         print_overflow_msg(__func__, xdr);
5178         return -EIO;
5179 }
5180
5181 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5182 {
5183         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5184 }
5185
5186 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5187 {
5188         __be32 *p;
5189         int status;
5190
5191         status = decode_op_hdr(xdr, OP_WRITE);
5192         if (status)
5193                 return status;
5194
5195         p = xdr_inline_decode(xdr, 8);
5196         if (unlikely(!p))
5197                 goto out_overflow;
5198         res->count = be32_to_cpup(p++);
5199         res->verf->committed = be32_to_cpup(p++);
5200         return decode_write_verifier(xdr, &res->verf->verifier);
5201 out_overflow:
5202         print_overflow_msg(__func__, xdr);
5203         return -EIO;
5204 }
5205
5206 static int decode_delegreturn(struct xdr_stream *xdr)
5207 {
5208         return decode_op_hdr(xdr, OP_DELEGRETURN);
5209 }
5210
5211 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5212 {
5213         __be32 *p;
5214
5215         p = xdr_inline_decode(xdr, 4);
5216         if (unlikely(!p))
5217                 goto out_overflow;
5218         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5219         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5220                 goto out_err;
5221
5222         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5223         if (unlikely(!p))
5224                 goto out_overflow;
5225         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5226
5227         p = xdr_inline_decode(xdr, 8);
5228         if (unlikely(!p))
5229                 goto out_overflow;
5230         flavor->gss.qop4 = be32_to_cpup(p++);
5231         flavor->gss.service = be32_to_cpup(p);
5232
5233         return 0;
5234
5235 out_overflow:
5236         print_overflow_msg(__func__, xdr);
5237         return -EIO;
5238 out_err:
5239         return -EINVAL;
5240 }
5241
5242 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5243 {
5244         struct nfs4_secinfo_flavor *sec_flavor;
5245         int status;
5246         __be32 *p;
5247         int i, num_flavors;
5248
5249         p = xdr_inline_decode(xdr, 4);
5250         if (unlikely(!p))
5251                 goto out_overflow;
5252
5253         res->flavors->num_flavors = 0;
5254         num_flavors = be32_to_cpup(p);
5255
5256         for (i = 0; i < num_flavors; i++) {
5257                 sec_flavor = &res->flavors->flavors[i];
5258                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5259                         break;
5260
5261                 p = xdr_inline_decode(xdr, 4);
5262                 if (unlikely(!p))
5263                         goto out_overflow;
5264                 sec_flavor->flavor = be32_to_cpup(p);
5265
5266                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5267                         status = decode_secinfo_gss(xdr, sec_flavor);
5268                         if (status)
5269                                 goto out;
5270                 }
5271                 res->flavors->num_flavors++;
5272         }
5273
5274         status = 0;
5275 out:
5276         return status;
5277 out_overflow:
5278         print_overflow_msg(__func__, xdr);
5279         return -EIO;
5280 }
5281
5282 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5283 {
5284         int status = decode_op_hdr(xdr, OP_SECINFO);
5285         if (status)
5286                 return status;
5287         return decode_secinfo_common(xdr, res);
5288 }
5289
5290 #if defined(CONFIG_NFS_V4_1)
5291 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5292 {
5293         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5294         if (status)
5295                 return status;
5296         return decode_secinfo_common(xdr, res);
5297 }
5298
5299 static int decode_exchange_id(struct xdr_stream *xdr,
5300                               struct nfs41_exchange_id_res *res)
5301 {
5302         __be32 *p;
5303         uint32_t dummy;
5304         char *dummy_str;
5305         int status;
5306         uint32_t impl_id_count;
5307
5308         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5309         if (status)
5310                 return status;
5311
5312         p = xdr_inline_decode(xdr, 8);
5313         if (unlikely(!p))
5314                 goto out_overflow;
5315         xdr_decode_hyper(p, &res->clientid);
5316         p = xdr_inline_decode(xdr, 12);
5317         if (unlikely(!p))
5318                 goto out_overflow;
5319         res->seqid = be32_to_cpup(p++);
5320         res->flags = be32_to_cpup(p++);
5321
5322         /* We ask for SP4_NONE */
5323         dummy = be32_to_cpup(p);
5324         if (dummy != SP4_NONE)
5325                 return -EIO;
5326
5327         /* server_owner4.so_minor_id */
5328         p = xdr_inline_decode(xdr, 8);
5329         if (unlikely(!p))
5330                 goto out_overflow;
5331         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5332
5333         /* server_owner4.so_major_id */
5334         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5335         if (unlikely(status))
5336                 return status;
5337         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5338                 return -EIO;
5339         memcpy(res->server_owner->major_id, dummy_str, dummy);
5340         res->server_owner->major_id_sz = dummy;
5341
5342         /* server_scope4 */
5343         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5344         if (unlikely(status))
5345                 return status;
5346         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5347                 return -EIO;
5348         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5349         res->server_scope->server_scope_sz = dummy;
5350
5351         /* Implementation Id */
5352         p = xdr_inline_decode(xdr, 4);
5353         if (unlikely(!p))
5354                 goto out_overflow;
5355         impl_id_count = be32_to_cpup(p++);
5356
5357         if (impl_id_count) {
5358                 /* nii_domain */
5359                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5360                 if (unlikely(status))
5361                         return status;
5362                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5363                         return -EIO;
5364                 memcpy(res->impl_id->domain, dummy_str, dummy);
5365
5366                 /* nii_name */
5367                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5368                 if (unlikely(status))
5369                         return status;
5370                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5371                         return -EIO;
5372                 memcpy(res->impl_id->name, dummy_str, dummy);
5373
5374                 /* nii_date */
5375                 p = xdr_inline_decode(xdr, 12);
5376                 if (unlikely(!p))
5377                         goto out_overflow;
5378                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5379                 res->impl_id->date.nseconds = be32_to_cpup(p);
5380
5381                 /* if there's more than one entry, ignore the rest */
5382         }
5383         return 0;
5384 out_overflow:
5385         print_overflow_msg(__func__, xdr);
5386         return -EIO;
5387 }
5388
5389 static int decode_chan_attrs(struct xdr_stream *xdr,
5390                              struct nfs4_channel_attrs *attrs)
5391 {
5392         __be32 *p;
5393         u32 nr_attrs, val;
5394
5395         p = xdr_inline_decode(xdr, 28);
5396         if (unlikely(!p))
5397                 goto out_overflow;
5398         val = be32_to_cpup(p++);        /* headerpadsz */
5399         if (val)
5400                 return -EINVAL;         /* no support for header padding yet */
5401         attrs->max_rqst_sz = be32_to_cpup(p++);
5402         attrs->max_resp_sz = be32_to_cpup(p++);
5403         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5404         attrs->max_ops = be32_to_cpup(p++);
5405         attrs->max_reqs = be32_to_cpup(p++);
5406         nr_attrs = be32_to_cpup(p);
5407         if (unlikely(nr_attrs > 1)) {
5408                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5409                         "count %u\n", __func__, nr_attrs);
5410                 return -EINVAL;
5411         }
5412         if (nr_attrs == 1) {
5413                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5414                 if (unlikely(!p))
5415                         goto out_overflow;
5416         }
5417         return 0;
5418 out_overflow:
5419         print_overflow_msg(__func__, xdr);
5420         return -EIO;
5421 }
5422
5423 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5424 {
5425         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5426 }
5427
5428 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5429                                 struct nfs41_bind_conn_to_session_res *res)
5430 {
5431         __be32 *p;
5432         int status;
5433
5434         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5435         if (!status)
5436                 status = decode_sessionid(xdr, &res->session->sess_id);
5437         if (unlikely(status))
5438                 return status;
5439
5440         /* dir flags, rdma mode bool */
5441         p = xdr_inline_decode(xdr, 8);
5442         if (unlikely(!p))
5443                 goto out_overflow;
5444
5445         res->dir = be32_to_cpup(p++);
5446         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5447                 return -EIO;
5448         if (be32_to_cpup(p) == 0)
5449                 res->use_conn_in_rdma_mode = false;
5450         else
5451                 res->use_conn_in_rdma_mode = true;
5452
5453         return 0;
5454 out_overflow:
5455         print_overflow_msg(__func__, xdr);
5456         return -EIO;
5457 }
5458
5459 static int decode_create_session(struct xdr_stream *xdr,
5460                                  struct nfs41_create_session_res *res)
5461 {
5462         __be32 *p;
5463         int status;
5464         struct nfs_client *clp = res->client;
5465         struct nfs4_session *session = clp->cl_session;
5466
5467         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5468         if (!status)
5469                 status = decode_sessionid(xdr, &session->sess_id);
5470         if (unlikely(status))
5471                 return status;
5472
5473         /* seqid, flags */
5474         p = xdr_inline_decode(xdr, 8);
5475         if (unlikely(!p))
5476                 goto out_overflow;
5477         clp->cl_seqid = be32_to_cpup(p++);
5478         session->flags = be32_to_cpup(p);
5479
5480         /* Channel attributes */
5481         status = decode_chan_attrs(xdr, &session->fc_attrs);
5482         if (!status)
5483                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5484         return status;
5485 out_overflow:
5486         print_overflow_msg(__func__, xdr);
5487         return -EIO;
5488 }
5489
5490 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5491 {
5492         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5493 }
5494
5495 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5496 {
5497         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5498 }
5499
5500 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5501 {
5502         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5503 }
5504 #endif /* CONFIG_NFS_V4_1 */
5505
5506 static int decode_sequence(struct xdr_stream *xdr,
5507                            struct nfs4_sequence_res *res,
5508                            struct rpc_rqst *rqstp)
5509 {
5510 #if defined(CONFIG_NFS_V4_1)
5511         struct nfs4_session *session;
5512         struct nfs4_sessionid id;
5513         u32 dummy;
5514         int status;
5515         __be32 *p;
5516
5517         if (res->sr_slot == NULL)
5518                 return 0;
5519
5520         status = decode_op_hdr(xdr, OP_SEQUENCE);
5521         if (!status)
5522                 status = decode_sessionid(xdr, &id);
5523         if (unlikely(status))
5524                 goto out_err;
5525
5526         /*
5527          * If the server returns different values for sessionID, slotID or
5528          * sequence number, the server is looney tunes.
5529          */
5530         status = -EREMOTEIO;
5531         session = res->sr_slot->table->session;
5532
5533         if (memcmp(id.data, session->sess_id.data,
5534                    NFS4_MAX_SESSIONID_LEN)) {
5535                 dprintk("%s Invalid session id\n", __func__);
5536                 goto out_err;
5537         }
5538
5539         p = xdr_inline_decode(xdr, 20);
5540         if (unlikely(!p))
5541                 goto out_overflow;
5542
5543         /* seqid */
5544         dummy = be32_to_cpup(p++);
5545         if (dummy != res->sr_slot->seq_nr) {
5546                 dprintk("%s Invalid sequence number\n", __func__);
5547                 goto out_err;
5548         }
5549         /* slot id */
5550         dummy = be32_to_cpup(p++);
5551         if (dummy != res->sr_slot->slot_nr) {
5552                 dprintk("%s Invalid slot id\n", __func__);
5553                 goto out_err;
5554         }
5555         /* highest slot id */
5556         res->sr_highest_slotid = be32_to_cpup(p++);
5557         /* target highest slot id */
5558         res->sr_target_highest_slotid = be32_to_cpup(p++);
5559         /* result flags */
5560         res->sr_status_flags = be32_to_cpup(p);
5561         status = 0;
5562 out_err:
5563         res->sr_status = status;
5564         return status;
5565 out_overflow:
5566         print_overflow_msg(__func__, xdr);
5567         status = -EIO;
5568         goto out_err;
5569 #else  /* CONFIG_NFS_V4_1 */
5570         return 0;
5571 #endif /* CONFIG_NFS_V4_1 */
5572 }
5573
5574 #if defined(CONFIG_NFS_V4_1)
5575 /*
5576  * TODO: Need to handle case when EOF != true;
5577  */
5578 static int decode_getdevicelist(struct xdr_stream *xdr,
5579                                 struct pnfs_devicelist *res)
5580 {
5581         __be32 *p;
5582         int status, i;
5583         nfs4_verifier verftemp;
5584
5585         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5586         if (status)
5587                 return status;
5588
5589         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5590         if (unlikely(!p))
5591                 goto out_overflow;
5592
5593         /* TODO: Skip cookie for now */
5594         p += 2;
5595
5596         /* Read verifier */
5597         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5598
5599         res->num_devs = be32_to_cpup(p);
5600
5601         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5602
5603         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5604                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5605                                 __func__, res->num_devs);
5606                 return -EIO;
5607         }
5608
5609         p = xdr_inline_decode(xdr,
5610                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5611         if (unlikely(!p))
5612                 goto out_overflow;
5613         for (i = 0; i < res->num_devs; i++)
5614                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5615                                             NFS4_DEVICEID4_SIZE);
5616         res->eof = be32_to_cpup(p);
5617         return 0;
5618 out_overflow:
5619         print_overflow_msg(__func__, xdr);
5620         return -EIO;
5621 }
5622
5623 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5624                                 struct pnfs_device *pdev)
5625 {
5626         __be32 *p;
5627         uint32_t len, type;
5628         int status;
5629
5630         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5631         if (status) {
5632                 if (status == -ETOOSMALL) {
5633                         p = xdr_inline_decode(xdr, 4);
5634                         if (unlikely(!p))
5635                                 goto out_overflow;
5636                         pdev->mincount = be32_to_cpup(p);
5637                         dprintk("%s: Min count too small. mincnt = %u\n",
5638                                 __func__, pdev->mincount);
5639                 }
5640                 return status;
5641         }
5642
5643         p = xdr_inline_decode(xdr, 8);
5644         if (unlikely(!p))
5645                 goto out_overflow;
5646         type = be32_to_cpup(p++);
5647         if (type != pdev->layout_type) {
5648                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5649                         __func__, pdev->layout_type, type);
5650                 return -EINVAL;
5651         }
5652         /*
5653          * Get the length of the opaque device_addr4. xdr_read_pages places
5654          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5655          * and places the remaining xdr data in xdr_buf->tail
5656          */
5657         pdev->mincount = be32_to_cpup(p);
5658         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5659                 goto out_overflow;
5660
5661         /* Parse notification bitmap, verifying that it is zero. */
5662         p = xdr_inline_decode(xdr, 4);
5663         if (unlikely(!p))
5664                 goto out_overflow;
5665         len = be32_to_cpup(p);
5666         if (len) {
5667                 uint32_t i;
5668
5669                 p = xdr_inline_decode(xdr, 4 * len);
5670                 if (unlikely(!p))
5671                         goto out_overflow;
5672                 for (i = 0; i < len; i++, p++) {
5673                         if (be32_to_cpup(p)) {
5674                                 dprintk("%s: notifications not supported\n",
5675                                         __func__);
5676                                 return -EIO;
5677                         }
5678                 }
5679         }
5680         return 0;
5681 out_overflow:
5682         print_overflow_msg(__func__, xdr);
5683         return -EIO;
5684 }
5685
5686 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5687                             struct nfs4_layoutget_res *res)
5688 {
5689         __be32 *p;
5690         int status;
5691         u32 layout_count;
5692         u32 recvd;
5693
5694         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5695         if (status)
5696                 return status;
5697         p = xdr_inline_decode(xdr, 4);
5698         if (unlikely(!p))
5699                 goto out_overflow;
5700         res->return_on_close = be32_to_cpup(p);
5701         decode_stateid(xdr, &res->stateid);
5702         p = xdr_inline_decode(xdr, 4);
5703         if (unlikely(!p))
5704                 goto out_overflow;
5705         layout_count = be32_to_cpup(p);
5706         if (!layout_count) {
5707                 dprintk("%s: server responded with empty layout array\n",
5708                         __func__);
5709                 return -EINVAL;
5710         }
5711
5712         p = xdr_inline_decode(xdr, 28);
5713         if (unlikely(!p))
5714                 goto out_overflow;
5715         p = xdr_decode_hyper(p, &res->range.offset);
5716         p = xdr_decode_hyper(p, &res->range.length);
5717         res->range.iomode = be32_to_cpup(p++);
5718         res->type = be32_to_cpup(p++);
5719         res->layoutp->len = be32_to_cpup(p);
5720
5721         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5722                 __func__,
5723                 (unsigned long)res->range.offset,
5724                 (unsigned long)res->range.length,
5725                 res->range.iomode,
5726                 res->type,
5727                 res->layoutp->len);
5728
5729         recvd = xdr_read_pages(xdr, res->layoutp->len);
5730         if (res->layoutp->len > recvd) {
5731                 dprintk("NFS: server cheating in layoutget reply: "
5732                                 "layout len %u > recvd %u\n",
5733                                 res->layoutp->len, recvd);
5734                 return -EINVAL;
5735         }
5736
5737         if (layout_count > 1) {
5738                 /* We only handle a length one array at the moment.  Any
5739                  * further entries are just ignored.  Note that this means
5740                  * the client may see a response that is less than the
5741                  * minimum it requested.
5742                  */
5743                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5744                         __func__, layout_count);
5745         }
5746
5747         return 0;
5748 out_overflow:
5749         print_overflow_msg(__func__, xdr);
5750         return -EIO;
5751 }
5752
5753 static int decode_layoutreturn(struct xdr_stream *xdr,
5754                                struct nfs4_layoutreturn_res *res)
5755 {
5756         __be32 *p;
5757         int status;
5758
5759         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5760         if (status)
5761                 return status;
5762         p = xdr_inline_decode(xdr, 4);
5763         if (unlikely(!p))
5764                 goto out_overflow;
5765         res->lrs_present = be32_to_cpup(p);
5766         if (res->lrs_present)
5767                 status = decode_stateid(xdr, &res->stateid);
5768         return status;
5769 out_overflow:
5770         print_overflow_msg(__func__, xdr);
5771         return -EIO;
5772 }
5773
5774 static int decode_layoutcommit(struct xdr_stream *xdr,
5775                                struct rpc_rqst *req,
5776                                struct nfs4_layoutcommit_res *res)
5777 {
5778         __be32 *p;
5779         __u32 sizechanged;
5780         int status;
5781
5782         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5783         res->status = status;
5784         if (status)
5785                 return status;
5786
5787         p = xdr_inline_decode(xdr, 4);
5788         if (unlikely(!p))
5789                 goto out_overflow;
5790         sizechanged = be32_to_cpup(p);
5791
5792         if (sizechanged) {
5793                 /* throw away new size */
5794                 p = xdr_inline_decode(xdr, 8);
5795                 if (unlikely(!p))
5796                         goto out_overflow;
5797         }
5798         return 0;
5799 out_overflow:
5800         print_overflow_msg(__func__, xdr);
5801         return -EIO;
5802 }
5803
5804 static int decode_test_stateid(struct xdr_stream *xdr,
5805                                struct nfs41_test_stateid_res *res)
5806 {
5807         __be32 *p;
5808         int status;
5809         int num_res;
5810
5811         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5812         if (status)
5813                 return status;
5814
5815         p = xdr_inline_decode(xdr, 4);
5816         if (unlikely(!p))
5817                 goto out_overflow;
5818         num_res = be32_to_cpup(p++);
5819         if (num_res != 1)
5820                 goto out;
5821
5822         p = xdr_inline_decode(xdr, 4);
5823         if (unlikely(!p))
5824                 goto out_overflow;
5825         res->status = be32_to_cpup(p++);
5826
5827         return status;
5828 out_overflow:
5829         print_overflow_msg(__func__, xdr);
5830 out:
5831         return -EIO;
5832 }
5833
5834 static int decode_free_stateid(struct xdr_stream *xdr,
5835                                struct nfs41_free_stateid_res *res)
5836 {
5837         __be32 *p;
5838         int status;
5839
5840         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5841         if (status)
5842                 return status;
5843
5844         p = xdr_inline_decode(xdr, 4);
5845         if (unlikely(!p))
5846                 goto out_overflow;
5847         res->status = be32_to_cpup(p++);
5848         return res->status;
5849 out_overflow:
5850         print_overflow_msg(__func__, xdr);
5851         return -EIO;
5852 }
5853 #endif /* CONFIG_NFS_V4_1 */
5854
5855 /*
5856  * END OF "GENERIC" DECODE ROUTINES.
5857  */
5858
5859 /*
5860  * Decode OPEN_DOWNGRADE response
5861  */
5862 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5863                                        struct xdr_stream *xdr,
5864                                        struct nfs_closeres *res)
5865 {
5866         struct compound_hdr hdr;
5867         int status;
5868
5869         status = decode_compound_hdr(xdr, &hdr);
5870         if (status)
5871                 goto out;
5872         status = decode_sequence(xdr, &res->seq_res, rqstp);
5873         if (status)
5874                 goto out;
5875         status = decode_putfh(xdr);
5876         if (status)
5877                 goto out;
5878         status = decode_open_downgrade(xdr, res);
5879         if (status != 0)
5880                 goto out;
5881         decode_getfattr(xdr, res->fattr, res->server);
5882 out:
5883         return status;
5884 }
5885
5886 /*
5887  * Decode ACCESS response
5888  */
5889 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5890                                struct nfs4_accessres *res)
5891 {
5892         struct compound_hdr hdr;
5893         int status;
5894
5895         status = decode_compound_hdr(xdr, &hdr);
5896         if (status)
5897                 goto out;
5898         status = decode_sequence(xdr, &res->seq_res, rqstp);
5899         if (status)
5900                 goto out;
5901         status = decode_putfh(xdr);
5902         if (status != 0)
5903                 goto out;
5904         status = decode_access(xdr, &res->supported, &res->access);
5905         if (status != 0)
5906                 goto out;
5907         decode_getfattr(xdr, res->fattr, res->server);
5908 out:
5909         return status;
5910 }
5911
5912 /*
5913  * Decode LOOKUP response
5914  */
5915 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5916                                struct nfs4_lookup_res *res)
5917 {
5918         struct compound_hdr hdr;
5919         int status;
5920
5921         status = decode_compound_hdr(xdr, &hdr);
5922         if (status)
5923                 goto out;
5924         status = decode_sequence(xdr, &res->seq_res, rqstp);
5925         if (status)
5926                 goto out;
5927         status = decode_putfh(xdr);
5928         if (status)
5929                 goto out;
5930         status = decode_lookup(xdr);
5931         if (status)
5932                 goto out;
5933         status = decode_getfh(xdr, res->fh);
5934         if (status)
5935                 goto out;
5936         status = decode_getfattr(xdr, res->fattr, res->server);
5937 out:
5938         return status;
5939 }
5940
5941 /*
5942  * Decode LOOKUP_ROOT response
5943  */
5944 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5945                                     struct xdr_stream *xdr,
5946                                     struct nfs4_lookup_res *res)
5947 {
5948         struct compound_hdr hdr;
5949         int status;
5950
5951         status = decode_compound_hdr(xdr, &hdr);
5952         if (status)
5953                 goto out;
5954         status = decode_sequence(xdr, &res->seq_res, rqstp);
5955         if (status)
5956                 goto out;
5957         status = decode_putrootfh(xdr);
5958         if (status)
5959                 goto out;
5960         status = decode_getfh(xdr, res->fh);
5961         if (status == 0)
5962                 status = decode_getfattr(xdr, res->fattr, res->server);
5963 out:
5964         return status;
5965 }
5966
5967 /*
5968  * Decode REMOVE response
5969  */
5970 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5971                                struct nfs_removeres *res)
5972 {
5973         struct compound_hdr hdr;
5974         int status;
5975
5976         status = decode_compound_hdr(xdr, &hdr);
5977         if (status)
5978                 goto out;
5979         status = decode_sequence(xdr, &res->seq_res, rqstp);
5980         if (status)
5981                 goto out;
5982         status = decode_putfh(xdr);
5983         if (status)
5984                 goto out;
5985         status = decode_remove(xdr, &res->cinfo);
5986 out:
5987         return status;
5988 }
5989
5990 /*
5991  * Decode RENAME response
5992  */
5993 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5994                                struct nfs_renameres *res)
5995 {
5996         struct compound_hdr hdr;
5997         int status;
5998
5999         status = decode_compound_hdr(xdr, &hdr);
6000         if (status)
6001                 goto out;
6002         status = decode_sequence(xdr, &res->seq_res, rqstp);
6003         if (status)
6004                 goto out;
6005         status = decode_putfh(xdr);
6006         if (status)
6007                 goto out;
6008         status = decode_savefh(xdr);
6009         if (status)
6010                 goto out;
6011         status = decode_putfh(xdr);
6012         if (status)
6013                 goto out;
6014         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6015 out:
6016         return status;
6017 }
6018
6019 /*
6020  * Decode LINK response
6021  */
6022 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6023                              struct nfs4_link_res *res)
6024 {
6025         struct compound_hdr hdr;
6026         int status;
6027
6028         status = decode_compound_hdr(xdr, &hdr);
6029         if (status)
6030                 goto out;
6031         status = decode_sequence(xdr, &res->seq_res, rqstp);
6032         if (status)
6033                 goto out;
6034         status = decode_putfh(xdr);
6035         if (status)
6036                 goto out;
6037         status = decode_savefh(xdr);
6038         if (status)
6039                 goto out;
6040         status = decode_putfh(xdr);
6041         if (status)
6042                 goto out;
6043         status = decode_link(xdr, &res->cinfo);
6044         if (status)
6045                 goto out;
6046         /*
6047          * Note order: OP_LINK leaves the directory as the current
6048          *             filehandle.
6049          */
6050         status = decode_restorefh(xdr);
6051         if (status)
6052                 goto out;
6053         decode_getfattr(xdr, res->fattr, res->server);
6054 out:
6055         return status;
6056 }
6057
6058 /*
6059  * Decode CREATE response
6060  */
6061 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6062                                struct nfs4_create_res *res)
6063 {
6064         struct compound_hdr hdr;
6065         int status;
6066
6067         status = decode_compound_hdr(xdr, &hdr);
6068         if (status)
6069                 goto out;
6070         status = decode_sequence(xdr, &res->seq_res, rqstp);
6071         if (status)
6072                 goto out;
6073         status = decode_putfh(xdr);
6074         if (status)
6075                 goto out;
6076         status = decode_create(xdr, &res->dir_cinfo);
6077         if (status)
6078                 goto out;
6079         status = decode_getfh(xdr, res->fh);
6080         if (status)
6081                 goto out;
6082         decode_getfattr(xdr, res->fattr, res->server);
6083 out:
6084         return status;
6085 }
6086
6087 /*
6088  * Decode SYMLINK response
6089  */
6090 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6091                                 struct nfs4_create_res *res)
6092 {
6093         return nfs4_xdr_dec_create(rqstp, xdr, res);
6094 }
6095
6096 /*
6097  * Decode GETATTR response
6098  */
6099 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6100                                 struct nfs4_getattr_res *res)
6101 {
6102         struct compound_hdr hdr;
6103         int status;
6104
6105         status = decode_compound_hdr(xdr, &hdr);
6106         if (status)
6107                 goto out;
6108         status = decode_sequence(xdr, &res->seq_res, rqstp);
6109         if (status)
6110                 goto out;
6111         status = decode_putfh(xdr);
6112         if (status)
6113                 goto out;
6114         status = decode_getfattr(xdr, res->fattr, res->server);
6115 out:
6116         return status;
6117 }
6118
6119 /*
6120  * Encode an SETACL request
6121  */
6122 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6123                                 struct nfs_setaclargs *args)
6124 {
6125         struct compound_hdr hdr = {
6126                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6127         };
6128
6129         encode_compound_hdr(xdr, req, &hdr);
6130         encode_sequence(xdr, &args->seq_args, &hdr);
6131         encode_putfh(xdr, args->fh, &hdr);
6132         encode_setacl(xdr, args, &hdr);
6133         encode_nops(&hdr);
6134 }
6135
6136 /*
6137  * Decode SETACL response
6138  */
6139 static int
6140 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6141                     struct nfs_setaclres *res)
6142 {
6143         struct compound_hdr hdr;
6144         int status;
6145
6146         status = decode_compound_hdr(xdr, &hdr);
6147         if (status)
6148                 goto out;
6149         status = decode_sequence(xdr, &res->seq_res, rqstp);
6150         if (status)
6151                 goto out;
6152         status = decode_putfh(xdr);
6153         if (status)
6154                 goto out;
6155         status = decode_setattr(xdr);
6156 out:
6157         return status;
6158 }
6159
6160 /*
6161  * Decode GETACL response
6162  */
6163 static int
6164 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6165                     struct nfs_getaclres *res)
6166 {
6167         struct compound_hdr hdr;
6168         int status;
6169
6170         if (res->acl_scratch != NULL) {
6171                 void *p = page_address(res->acl_scratch);
6172                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6173         }
6174         status = decode_compound_hdr(xdr, &hdr);
6175         if (status)
6176                 goto out;
6177         status = decode_sequence(xdr, &res->seq_res, rqstp);
6178         if (status)
6179                 goto out;
6180         status = decode_putfh(xdr);
6181         if (status)
6182                 goto out;
6183         status = decode_getacl(xdr, rqstp, res);
6184
6185 out:
6186         return status;
6187 }
6188
6189 /*
6190  * Decode CLOSE response
6191  */
6192 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6193                               struct nfs_closeres *res)
6194 {
6195         struct compound_hdr hdr;
6196         int status;
6197
6198         status = decode_compound_hdr(xdr, &hdr);
6199         if (status)
6200                 goto out;
6201         status = decode_sequence(xdr, &res->seq_res, rqstp);
6202         if (status)
6203                 goto out;
6204         status = decode_putfh(xdr);
6205         if (status)
6206                 goto out;
6207         status = decode_close(xdr, res);
6208         if (status != 0)
6209                 goto out;
6210         /*
6211          * Note: Server may do delete on close for this file
6212          *      in which case the getattr call will fail with
6213          *      an ESTALE error. Shouldn't be a problem,
6214          *      though, since fattr->valid will remain unset.
6215          */
6216         decode_getfattr(xdr, res->fattr, res->server);
6217 out:
6218         return status;
6219 }
6220
6221 /*
6222  * Decode OPEN response
6223  */
6224 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6225                              struct nfs_openres *res)
6226 {
6227         struct compound_hdr hdr;
6228         int status;
6229
6230         status = decode_compound_hdr(xdr, &hdr);
6231         if (status)
6232                 goto out;
6233         status = decode_sequence(xdr, &res->seq_res, rqstp);
6234         if (status)
6235                 goto out;
6236         status = decode_putfh(xdr);
6237         if (status)
6238                 goto out;
6239         status = decode_open(xdr, res);
6240         if (status)
6241                 goto out;
6242         status = decode_getfh(xdr, &res->fh);
6243         if (status)
6244                 goto out;
6245         if (res->access_request)
6246                 decode_access(xdr, &res->access_supported, &res->access_result);
6247         decode_getfattr(xdr, res->f_attr, res->server);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode OPEN_CONFIRM response
6254  */
6255 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6256                                      struct xdr_stream *xdr,
6257                                      struct nfs_open_confirmres *res)
6258 {
6259         struct compound_hdr hdr;
6260         int status;
6261
6262         status = decode_compound_hdr(xdr, &hdr);
6263         if (status)
6264                 goto out;
6265         status = decode_putfh(xdr);
6266         if (status)
6267                 goto out;
6268         status = decode_open_confirm(xdr, res);
6269 out:
6270         return status;
6271 }
6272
6273 /*
6274  * Decode OPEN response
6275  */
6276 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6277                                     struct xdr_stream *xdr,
6278                                     struct nfs_openres *res)
6279 {
6280         struct compound_hdr hdr;
6281         int status;
6282
6283         status = decode_compound_hdr(xdr, &hdr);
6284         if (status)
6285                 goto out;
6286         status = decode_sequence(xdr, &res->seq_res, rqstp);
6287         if (status)
6288                 goto out;
6289         status = decode_putfh(xdr);
6290         if (status)
6291                 goto out;
6292         status = decode_open(xdr, res);
6293         if (status)
6294                 goto out;
6295         if (res->access_request)
6296                 decode_access(xdr, &res->access_supported, &res->access_result);
6297         decode_getfattr(xdr, res->f_attr, res->server);
6298 out:
6299         return status;
6300 }
6301
6302 /*
6303  * Decode SETATTR response
6304  */
6305 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6306                                 struct xdr_stream *xdr,
6307                                 struct nfs_setattrres *res)
6308 {
6309         struct compound_hdr hdr;
6310         int status;
6311
6312         status = decode_compound_hdr(xdr, &hdr);
6313         if (status)
6314                 goto out;
6315         status = decode_sequence(xdr, &res->seq_res, rqstp);
6316         if (status)
6317                 goto out;
6318         status = decode_putfh(xdr);
6319         if (status)
6320                 goto out;
6321         status = decode_setattr(xdr);
6322         if (status)
6323                 goto out;
6324         decode_getfattr(xdr, res->fattr, res->server);
6325 out:
6326         return status;
6327 }
6328
6329 /*
6330  * Decode LOCK response
6331  */
6332 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6333                              struct nfs_lock_res *res)
6334 {
6335         struct compound_hdr hdr;
6336         int status;
6337
6338         status = decode_compound_hdr(xdr, &hdr);
6339         if (status)
6340                 goto out;
6341         status = decode_sequence(xdr, &res->seq_res, rqstp);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_lock(xdr, res);
6348 out:
6349         return status;
6350 }
6351
6352 /*
6353  * Decode LOCKT response
6354  */
6355 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356                               struct nfs_lockt_res *res)
6357 {
6358         struct compound_hdr hdr;
6359         int status;
6360
6361         status = decode_compound_hdr(xdr, &hdr);
6362         if (status)
6363                 goto out;
6364         status = decode_sequence(xdr, &res->seq_res, rqstp);
6365         if (status)
6366                 goto out;
6367         status = decode_putfh(xdr);
6368         if (status)
6369                 goto out;
6370         status = decode_lockt(xdr, res);
6371 out:
6372         return status;
6373 }
6374
6375 /*
6376  * Decode LOCKU response
6377  */
6378 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379                               struct nfs_locku_res *res)
6380 {
6381         struct compound_hdr hdr;
6382         int status;
6383
6384         status = decode_compound_hdr(xdr, &hdr);
6385         if (status)
6386                 goto out;
6387         status = decode_sequence(xdr, &res->seq_res, rqstp);
6388         if (status)
6389                 goto out;
6390         status = decode_putfh(xdr);
6391         if (status)
6392                 goto out;
6393         status = decode_locku(xdr, res);
6394 out:
6395         return status;
6396 }
6397
6398 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6399                                           struct xdr_stream *xdr, void *dummy)
6400 {
6401         struct compound_hdr hdr;
6402         int status;
6403
6404         status = decode_compound_hdr(xdr, &hdr);
6405         if (!status)
6406                 status = decode_release_lockowner(xdr);
6407         return status;
6408 }
6409
6410 /*
6411  * Decode READLINK response
6412  */
6413 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6414                                  struct xdr_stream *xdr,
6415                                  struct nfs4_readlink_res *res)
6416 {
6417         struct compound_hdr hdr;
6418         int status;
6419
6420         status = decode_compound_hdr(xdr, &hdr);
6421         if (status)
6422                 goto out;
6423         status = decode_sequence(xdr, &res->seq_res, rqstp);
6424         if (status)
6425                 goto out;
6426         status = decode_putfh(xdr);
6427         if (status)
6428                 goto out;
6429         status = decode_readlink(xdr, rqstp);
6430 out:
6431         return status;
6432 }
6433
6434 /*
6435  * Decode READDIR response
6436  */
6437 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6438                                 struct nfs4_readdir_res *res)
6439 {
6440         struct compound_hdr hdr;
6441         int status;
6442
6443         status = decode_compound_hdr(xdr, &hdr);
6444         if (status)
6445                 goto out;
6446         status = decode_sequence(xdr, &res->seq_res, rqstp);
6447         if (status)
6448                 goto out;
6449         status = decode_putfh(xdr);
6450         if (status)
6451                 goto out;
6452         status = decode_readdir(xdr, rqstp, res);
6453 out:
6454         return status;
6455 }
6456
6457 /*
6458  * Decode Read response
6459  */
6460 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6461                              struct nfs_readres *res)
6462 {
6463         struct compound_hdr hdr;
6464         int status;
6465
6466         status = decode_compound_hdr(xdr, &hdr);
6467         if (status)
6468                 goto out;
6469         status = decode_sequence(xdr, &res->seq_res, rqstp);
6470         if (status)
6471                 goto out;
6472         status = decode_putfh(xdr);
6473         if (status)
6474                 goto out;
6475         status = decode_read(xdr, rqstp, res);
6476         if (!status)
6477                 status = res->count;
6478 out:
6479         return status;
6480 }
6481
6482 /*
6483  * Decode WRITE response
6484  */
6485 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6486                               struct nfs_writeres *res)
6487 {
6488         struct compound_hdr hdr;
6489         int status;
6490
6491         status = decode_compound_hdr(xdr, &hdr);
6492         if (status)
6493                 goto out;
6494         status = decode_sequence(xdr, &res->seq_res, rqstp);
6495         if (status)
6496                 goto out;
6497         status = decode_putfh(xdr);
6498         if (status)
6499                 goto out;
6500         status = decode_write(xdr, res);
6501         if (status)
6502                 goto out;
6503         if (res->fattr)
6504                 decode_getfattr(xdr, res->fattr, res->server);
6505         if (!status)
6506                 status = res->count;
6507 out:
6508         return status;
6509 }
6510
6511 /*
6512  * Decode COMMIT response
6513  */
6514 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6515                                struct nfs_commitres *res)
6516 {
6517         struct compound_hdr hdr;
6518         int status;
6519
6520         status = decode_compound_hdr(xdr, &hdr);
6521         if (status)
6522                 goto out;
6523         status = decode_sequence(xdr, &res->seq_res, rqstp);
6524         if (status)
6525                 goto out;
6526         status = decode_putfh(xdr);
6527         if (status)
6528                 goto out;
6529         status = decode_commit(xdr, res);
6530 out:
6531         return status;
6532 }
6533
6534 /*
6535  * Decode FSINFO response
6536  */
6537 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6538                                struct nfs4_fsinfo_res *res)
6539 {
6540         struct compound_hdr hdr;
6541         int status;
6542
6543         status = decode_compound_hdr(xdr, &hdr);
6544         if (!status)
6545                 status = decode_sequence(xdr, &res->seq_res, req);
6546         if (!status)
6547                 status = decode_putfh(xdr);
6548         if (!status)
6549                 status = decode_fsinfo(xdr, res->fsinfo);
6550         return status;
6551 }
6552
6553 /*
6554  * Decode PATHCONF response
6555  */
6556 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6557                                  struct nfs4_pathconf_res *res)
6558 {
6559         struct compound_hdr hdr;
6560         int status;
6561
6562         status = decode_compound_hdr(xdr, &hdr);
6563         if (!status)
6564                 status = decode_sequence(xdr, &res->seq_res, req);
6565         if (!status)
6566                 status = decode_putfh(xdr);
6567         if (!status)
6568                 status = decode_pathconf(xdr, res->pathconf);
6569         return status;
6570 }
6571
6572 /*
6573  * Decode STATFS response
6574  */
6575 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6576                                struct nfs4_statfs_res *res)
6577 {
6578         struct compound_hdr hdr;
6579         int status;
6580
6581         status = decode_compound_hdr(xdr, &hdr);
6582         if (!status)
6583                 status = decode_sequence(xdr, &res->seq_res, req);
6584         if (!status)
6585                 status = decode_putfh(xdr);
6586         if (!status)
6587                 status = decode_statfs(xdr, res->fsstat);
6588         return status;
6589 }
6590
6591 /*
6592  * Decode GETATTR_BITMAP response
6593  */
6594 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6595                                     struct xdr_stream *xdr,
6596                                     struct nfs4_server_caps_res *res)
6597 {
6598         struct compound_hdr hdr;
6599         int status;
6600
6601         status = decode_compound_hdr(xdr, &hdr);
6602         if (status)
6603                 goto out;
6604         status = decode_sequence(xdr, &res->seq_res, req);
6605         if (status)
6606                 goto out;
6607         status = decode_putfh(xdr);
6608         if (status)
6609                 goto out;
6610         status = decode_server_caps(xdr, res);
6611 out:
6612         return status;
6613 }
6614
6615 /*
6616  * Decode RENEW response
6617  */
6618 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6619                               void *__unused)
6620 {
6621         struct compound_hdr hdr;
6622         int status;
6623
6624         status = decode_compound_hdr(xdr, &hdr);
6625         if (!status)
6626                 status = decode_renew(xdr);
6627         return status;
6628 }
6629
6630 /*
6631  * Decode SETCLIENTID response
6632  */
6633 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6634                                     struct xdr_stream *xdr,
6635                                     struct nfs4_setclientid_res *res)
6636 {
6637         struct compound_hdr hdr;
6638         int status;
6639
6640         status = decode_compound_hdr(xdr, &hdr);
6641         if (!status)
6642                 status = decode_setclientid(xdr, res);
6643         return status;
6644 }
6645
6646 /*
6647  * Decode SETCLIENTID_CONFIRM response
6648  */
6649 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6650                                             struct xdr_stream *xdr,
6651                                             struct nfs_fsinfo *fsinfo)
6652 {
6653         struct compound_hdr hdr;
6654         int status;
6655
6656         status = decode_compound_hdr(xdr, &hdr);
6657         if (!status)
6658                 status = decode_setclientid_confirm(xdr);
6659         if (!status)
6660                 status = decode_putrootfh(xdr);
6661         if (!status)
6662                 status = decode_fsinfo(xdr, fsinfo);
6663         return status;
6664 }
6665
6666 /*
6667  * Decode DELEGRETURN response
6668  */
6669 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6670                                     struct xdr_stream *xdr,
6671                                     struct nfs4_delegreturnres *res)
6672 {
6673         struct compound_hdr hdr;
6674         int status;
6675
6676         status = decode_compound_hdr(xdr, &hdr);
6677         if (status)
6678                 goto out;
6679         status = decode_sequence(xdr, &res->seq_res, rqstp);
6680         if (status)
6681                 goto out;
6682         status = decode_putfh(xdr);
6683         if (status != 0)
6684                 goto out;
6685         status = decode_getfattr(xdr, res->fattr, res->server);
6686         if (status != 0)
6687                 goto out;
6688         status = decode_delegreturn(xdr);
6689 out:
6690         return status;
6691 }
6692
6693 /*
6694  * Decode FS_LOCATIONS response
6695  */
6696 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6697                                      struct xdr_stream *xdr,
6698                                      struct nfs4_fs_locations_res *res)
6699 {
6700         struct compound_hdr hdr;
6701         int status;
6702
6703         status = decode_compound_hdr(xdr, &hdr);
6704         if (status)
6705                 goto out;
6706         status = decode_sequence(xdr, &res->seq_res, req);
6707         if (status)
6708                 goto out;
6709         status = decode_putfh(xdr);
6710         if (status)
6711                 goto out;
6712         status = decode_lookup(xdr);
6713         if (status)
6714                 goto out;
6715         xdr_enter_page(xdr, PAGE_SIZE);
6716         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6717                                          NULL, res->fs_locations,
6718                                          res->fs_locations->server);
6719 out:
6720         return status;
6721 }
6722
6723 /*
6724  * Decode SECINFO response
6725  */
6726 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6727                                 struct xdr_stream *xdr,
6728                                 struct nfs4_secinfo_res *res)
6729 {
6730         struct compound_hdr hdr;
6731         int status;
6732
6733         status = decode_compound_hdr(xdr, &hdr);
6734         if (status)
6735                 goto out;
6736         status = decode_sequence(xdr, &res->seq_res, rqstp);
6737         if (status)
6738                 goto out;
6739         status = decode_putfh(xdr);
6740         if (status)
6741                 goto out;
6742         status = decode_secinfo(xdr, res);
6743 out:
6744         return status;
6745 }
6746
6747 #if defined(CONFIG_NFS_V4_1)
6748 /*
6749  * Decode BIND_CONN_TO_SESSION response
6750  */
6751 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6752                                         struct xdr_stream *xdr,
6753                                         void *res)
6754 {
6755         struct compound_hdr hdr;
6756         int status;
6757
6758         status = decode_compound_hdr(xdr, &hdr);
6759         if (!status)
6760                 status = decode_bind_conn_to_session(xdr, res);
6761         return status;
6762 }
6763
6764 /*
6765  * Decode EXCHANGE_ID response
6766  */
6767 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6768                                     struct xdr_stream *xdr,
6769                                     void *res)
6770 {
6771         struct compound_hdr hdr;
6772         int status;
6773
6774         status = decode_compound_hdr(xdr, &hdr);
6775         if (!status)
6776                 status = decode_exchange_id(xdr, res);
6777         return status;
6778 }
6779
6780 /*
6781  * Decode CREATE_SESSION response
6782  */
6783 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6784                                        struct xdr_stream *xdr,
6785                                        struct nfs41_create_session_res *res)
6786 {
6787         struct compound_hdr hdr;
6788         int status;
6789
6790         status = decode_compound_hdr(xdr, &hdr);
6791         if (!status)
6792                 status = decode_create_session(xdr, res);
6793         return status;
6794 }
6795
6796 /*
6797  * Decode DESTROY_SESSION response
6798  */
6799 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6800                                         struct xdr_stream *xdr,
6801                                         void *res)
6802 {
6803         struct compound_hdr hdr;
6804         int status;
6805
6806         status = decode_compound_hdr(xdr, &hdr);
6807         if (!status)
6808                 status = decode_destroy_session(xdr, res);
6809         return status;
6810 }
6811
6812 /*
6813  * Decode DESTROY_CLIENTID response
6814  */
6815 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6816                                         struct xdr_stream *xdr,
6817                                         void *res)
6818 {
6819         struct compound_hdr hdr;
6820         int status;
6821
6822         status = decode_compound_hdr(xdr, &hdr);
6823         if (!status)
6824                 status = decode_destroy_clientid(xdr, res);
6825         return status;
6826 }
6827
6828 /*
6829  * Decode SEQUENCE response
6830  */
6831 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6832                                  struct xdr_stream *xdr,
6833                                  struct nfs4_sequence_res *res)
6834 {
6835         struct compound_hdr hdr;
6836         int status;
6837
6838         status = decode_compound_hdr(xdr, &hdr);
6839         if (!status)
6840                 status = decode_sequence(xdr, res, rqstp);
6841         return status;
6842 }
6843
6844 /*
6845  * Decode GET_LEASE_TIME response
6846  */
6847 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6848                                        struct xdr_stream *xdr,
6849                                        struct nfs4_get_lease_time_res *res)
6850 {
6851         struct compound_hdr hdr;
6852         int status;
6853
6854         status = decode_compound_hdr(xdr, &hdr);
6855         if (!status)
6856                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6857         if (!status)
6858                 status = decode_putrootfh(xdr);
6859         if (!status)
6860                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6861         return status;
6862 }
6863
6864 /*
6865  * Decode RECLAIM_COMPLETE response
6866  */
6867 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6868                                          struct xdr_stream *xdr,
6869                                          struct nfs41_reclaim_complete_res *res)
6870 {
6871         struct compound_hdr hdr;
6872         int status;
6873
6874         status = decode_compound_hdr(xdr, &hdr);
6875         if (!status)
6876                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6877         if (!status)
6878                 status = decode_reclaim_complete(xdr, (void *)NULL);
6879         return status;
6880 }
6881
6882 /*
6883  * Decode GETDEVICELIST response
6884  */
6885 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6886                                       struct xdr_stream *xdr,
6887                                       struct nfs4_getdevicelist_res *res)
6888 {
6889         struct compound_hdr hdr;
6890         int status;
6891
6892         dprintk("encoding getdevicelist!\n");
6893
6894         status = decode_compound_hdr(xdr, &hdr);
6895         if (status != 0)
6896                 goto out;
6897         status = decode_sequence(xdr, &res->seq_res, rqstp);
6898         if (status != 0)
6899                 goto out;
6900         status = decode_putfh(xdr);
6901         if (status != 0)
6902                 goto out;
6903         status = decode_getdevicelist(xdr, res->devlist);
6904 out:
6905         return status;
6906 }
6907
6908 /*
6909  * Decode GETDEVINFO response
6910  */
6911 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6912                                       struct xdr_stream *xdr,
6913                                       struct nfs4_getdeviceinfo_res *res)
6914 {
6915         struct compound_hdr hdr;
6916         int status;
6917
6918         status = decode_compound_hdr(xdr, &hdr);
6919         if (status != 0)
6920                 goto out;
6921         status = decode_sequence(xdr, &res->seq_res, rqstp);
6922         if (status != 0)
6923                 goto out;
6924         status = decode_getdeviceinfo(xdr, res->pdev);
6925 out:
6926         return status;
6927 }
6928
6929 /*
6930  * Decode LAYOUTGET response
6931  */
6932 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6933                                   struct xdr_stream *xdr,
6934                                   struct nfs4_layoutget_res *res)
6935 {
6936         struct compound_hdr hdr;
6937         int status;
6938
6939         status = decode_compound_hdr(xdr, &hdr);
6940         if (status)
6941                 goto out;
6942         status = decode_sequence(xdr, &res->seq_res, rqstp);
6943         if (status)
6944                 goto out;
6945         status = decode_putfh(xdr);
6946         if (status)
6947                 goto out;
6948         status = decode_layoutget(xdr, rqstp, res);
6949 out:
6950         return status;
6951 }
6952
6953 /*
6954  * Decode LAYOUTRETURN response
6955  */
6956 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6957                                      struct xdr_stream *xdr,
6958                                      struct nfs4_layoutreturn_res *res)
6959 {
6960         struct compound_hdr hdr;
6961         int status;
6962
6963         status = decode_compound_hdr(xdr, &hdr);
6964         if (status)
6965                 goto out;
6966         status = decode_sequence(xdr, &res->seq_res, rqstp);
6967         if (status)
6968                 goto out;
6969         status = decode_putfh(xdr);
6970         if (status)
6971                 goto out;
6972         status = decode_layoutreturn(xdr, res);
6973 out:
6974         return status;
6975 }
6976
6977 /*
6978  * Decode LAYOUTCOMMIT response
6979  */
6980 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6981                                      struct xdr_stream *xdr,
6982                                      struct nfs4_layoutcommit_res *res)
6983 {
6984         struct compound_hdr hdr;
6985         int status;
6986
6987         status = decode_compound_hdr(xdr, &hdr);
6988         if (status)
6989                 goto out;
6990         status = decode_sequence(xdr, &res->seq_res, rqstp);
6991         if (status)
6992                 goto out;
6993         status = decode_putfh(xdr);
6994         if (status)
6995                 goto out;
6996         status = decode_layoutcommit(xdr, rqstp, res);
6997         if (status)
6998                 goto out;
6999         decode_getfattr(xdr, res->fattr, res->server);
7000 out:
7001         return status;
7002 }
7003
7004 /*
7005  * Decode SECINFO_NO_NAME response
7006  */
7007 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7008                                         struct xdr_stream *xdr,
7009                                         struct nfs4_secinfo_res *res)
7010 {
7011         struct compound_hdr hdr;
7012         int status;
7013
7014         status = decode_compound_hdr(xdr, &hdr);
7015         if (status)
7016                 goto out;
7017         status = decode_sequence(xdr, &res->seq_res, rqstp);
7018         if (status)
7019                 goto out;
7020         status = decode_putrootfh(xdr);
7021         if (status)
7022                 goto out;
7023         status = decode_secinfo_no_name(xdr, res);
7024 out:
7025         return status;
7026 }
7027
7028 /*
7029  * Decode TEST_STATEID response
7030  */
7031 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7032                                      struct xdr_stream *xdr,
7033                                      struct nfs41_test_stateid_res *res)
7034 {
7035         struct compound_hdr hdr;
7036         int status;
7037
7038         status = decode_compound_hdr(xdr, &hdr);
7039         if (status)
7040                 goto out;
7041         status = decode_sequence(xdr, &res->seq_res, rqstp);
7042         if (status)
7043                 goto out;
7044         status = decode_test_stateid(xdr, res);
7045 out:
7046         return status;
7047 }
7048
7049 /*
7050  * Decode FREE_STATEID response
7051  */
7052 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7053                                      struct xdr_stream *xdr,
7054                                      struct nfs41_free_stateid_res *res)
7055 {
7056         struct compound_hdr hdr;
7057         int status;
7058
7059         status = decode_compound_hdr(xdr, &hdr);
7060         if (status)
7061                 goto out;
7062         status = decode_sequence(xdr, &res->seq_res, rqstp);
7063         if (status)
7064                 goto out;
7065         status = decode_free_stateid(xdr, res);
7066 out:
7067         return status;
7068 }
7069 #endif /* CONFIG_NFS_V4_1 */
7070
7071 /**
7072  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7073  *                      the local page cache.
7074  * @xdr: XDR stream where entry resides
7075  * @entry: buffer to fill in with entry data
7076  * @plus: boolean indicating whether this should be a readdirplus entry
7077  *
7078  * Returns zero if successful, otherwise a negative errno value is
7079  * returned.
7080  *
7081  * This function is not invoked during READDIR reply decoding, but
7082  * rather whenever an application invokes the getdents(2) system call
7083  * on a directory already in our cache.
7084  */
7085 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7086                        int plus)
7087 {
7088         unsigned int savep;
7089         uint32_t bitmap[3] = {0};
7090         uint32_t len;
7091         __be32 *p = xdr_inline_decode(xdr, 4);
7092         if (unlikely(!p))
7093                 goto out_overflow;
7094         if (*p == xdr_zero) {
7095                 p = xdr_inline_decode(xdr, 4);
7096                 if (unlikely(!p))
7097                         goto out_overflow;
7098                 if (*p == xdr_zero)
7099                         return -EAGAIN;
7100                 entry->eof = 1;
7101                 return -EBADCOOKIE;
7102         }
7103
7104         p = xdr_inline_decode(xdr, 12);
7105         if (unlikely(!p))
7106                 goto out_overflow;
7107         entry->prev_cookie = entry->cookie;
7108         p = xdr_decode_hyper(p, &entry->cookie);
7109         entry->len = be32_to_cpup(p);
7110
7111         p = xdr_inline_decode(xdr, entry->len);
7112         if (unlikely(!p))
7113                 goto out_overflow;
7114         entry->name = (const char *) p;
7115
7116         /*
7117          * In case the server doesn't return an inode number,
7118          * we fake one here.  (We don't use inode number 0,
7119          * since glibc seems to choke on it...)
7120          */
7121         entry->ino = 1;
7122         entry->fattr->valid = 0;
7123
7124         if (decode_attr_bitmap(xdr, bitmap) < 0)
7125                 goto out_overflow;
7126
7127         if (decode_attr_length(xdr, &len, &savep) < 0)
7128                 goto out_overflow;
7129
7130         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7131                                   NULL, entry->server) < 0)
7132                 goto out_overflow;
7133         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7134                 entry->ino = entry->fattr->mounted_on_fileid;
7135         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7136                 entry->ino = entry->fattr->fileid;
7137
7138         entry->d_type = DT_UNKNOWN;
7139         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7140                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7141
7142         return 0;
7143
7144 out_overflow:
7145         print_overflow_msg(__func__, xdr);
7146         return -EAGAIN;
7147 }
7148
7149 /*
7150  * We need to translate between nfs status return values and
7151  * the local errno values which may not be the same.
7152  */
7153 static struct {
7154         int stat;
7155         int errno;
7156 } nfs_errtbl[] = {
7157         { NFS4_OK,              0               },
7158         { NFS4ERR_PERM,         -EPERM          },
7159         { NFS4ERR_NOENT,        -ENOENT         },
7160         { NFS4ERR_IO,           -errno_NFSERR_IO},
7161         { NFS4ERR_NXIO,         -ENXIO          },
7162         { NFS4ERR_ACCESS,       -EACCES         },
7163         { NFS4ERR_EXIST,        -EEXIST         },
7164         { NFS4ERR_XDEV,         -EXDEV          },
7165         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7166         { NFS4ERR_ISDIR,        -EISDIR         },
7167         { NFS4ERR_INVAL,        -EINVAL         },
7168         { NFS4ERR_FBIG,         -EFBIG          },
7169         { NFS4ERR_NOSPC,        -ENOSPC         },
7170         { NFS4ERR_ROFS,         -EROFS          },
7171         { NFS4ERR_MLINK,        -EMLINK         },
7172         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7173         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7174         { NFS4ERR_DQUOT,        -EDQUOT         },
7175         { NFS4ERR_STALE,        -ESTALE         },
7176         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7177         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7178         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7179         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7180         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7181         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7182         { NFS4ERR_LOCKED,       -EAGAIN         },
7183         { NFS4ERR_SYMLINK,      -ELOOP          },
7184         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7185         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7186         { -1,                   -EIO            }
7187 };
7188
7189 /*
7190  * Convert an NFS error code to a local one.
7191  * This one is used jointly by NFSv2 and NFSv3.
7192  */
7193 static int
7194 nfs4_stat_to_errno(int stat)
7195 {
7196         int i;
7197         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7198                 if (nfs_errtbl[i].stat == stat)
7199                         return nfs_errtbl[i].errno;
7200         }
7201         if (stat <= 10000 || stat > 10100) {
7202                 /* The server is looney tunes. */
7203                 return -EREMOTEIO;
7204         }
7205         /* If we cannot translate the error, the recovery routines should
7206          * handle it.
7207          * Note: remaining NFSv4 error codes have values > 10000, so should
7208          * not conflict with native Linux error codes.
7209          */
7210         return -stat;
7211 }
7212
7213 #define PROC(proc, argtype, restype)                            \
7214 [NFSPROC4_CLNT_##proc] = {                                      \
7215         .p_proc   = NFSPROC4_COMPOUND,                          \
7216         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7217         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7218         .p_arglen = NFS4_##argtype##_sz,                        \
7219         .p_replen = NFS4_##restype##_sz,                        \
7220         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7221         .p_name   = #proc,                                      \
7222 }
7223
7224 struct rpc_procinfo     nfs4_procedures[] = {
7225         PROC(READ,              enc_read,               dec_read),
7226         PROC(WRITE,             enc_write,              dec_write),
7227         PROC(COMMIT,            enc_commit,             dec_commit),
7228         PROC(OPEN,              enc_open,               dec_open),
7229         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7230         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7231         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7232         PROC(CLOSE,             enc_close,              dec_close),
7233         PROC(SETATTR,           enc_setattr,            dec_setattr),
7234         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7235         PROC(RENEW,             enc_renew,              dec_renew),
7236         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7237         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7238         PROC(LOCK,              enc_lock,               dec_lock),
7239         PROC(LOCKT,             enc_lockt,              dec_lockt),
7240         PROC(LOCKU,             enc_locku,              dec_locku),
7241         PROC(ACCESS,            enc_access,             dec_access),
7242         PROC(GETATTR,           enc_getattr,            dec_getattr),
7243         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7244         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7245         PROC(REMOVE,            enc_remove,             dec_remove),
7246         PROC(RENAME,            enc_rename,             dec_rename),
7247         PROC(LINK,              enc_link,               dec_link),
7248         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7249         PROC(CREATE,            enc_create,             dec_create),
7250         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7251         PROC(STATFS,            enc_statfs,             dec_statfs),
7252         PROC(READLINK,          enc_readlink,           dec_readlink),
7253         PROC(READDIR,           enc_readdir,            dec_readdir),
7254         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7255         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7256         PROC(GETACL,            enc_getacl,             dec_getacl),
7257         PROC(SETACL,            enc_setacl,             dec_setacl),
7258         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7259         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7260         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7261 #if defined(CONFIG_NFS_V4_1)
7262         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7263         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7264         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7265         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7266         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7267         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7268         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7269         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7270         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7271         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7272         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7273         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7274         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7275         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7276         PROC(BIND_CONN_TO_SESSION,
7277                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7278         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7279 #endif /* CONFIG_NFS_V4_1 */
7280 };
7281
7282 const struct rpc_version nfs_version4 = {
7283         .number                 = 4,
7284         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7285         .procs                  = nfs4_procedures
7286 };
7287
7288 /*
7289  * Local variables:
7290  *  c-basic-offset: 8
7291  * End:
7292  */