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
  56 #include "nfs4_fs.h"
  57 #include "internal.h"
  58 #include "nfs4idmap.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #else
 109 #define nfs4_label_maxsz        0
 110 #endif
 111 /* We support only one layout type per file system */
 112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113 /* This is based on getfattr, which uses the most attributes: */
 114 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                  decode_mdsthreshold_maxsz))
 118 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                 nfs4_fattr_value_maxsz)
 120 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                  1 + 2 + 1 + \
 123                                 nfs4_owner_maxsz + \
 124                                 nfs4_group_maxsz + \
 125                                 nfs4_label_maxsz + \
 126                                 4 + 4)
 127 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 133  * layout types will be returned.
 134  */
 135 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139 #define encode_setclientid_maxsz \
 140                                 (op_encode_hdr_maxsz + \
 141                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                 /* client name */ \
 143                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 144                                 1 /* sc_prog */ + \
 145                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 147                                 1) /* sc_cb_ident */
 148 #define decode_setclientid_maxsz \
 149                                 (op_decode_hdr_maxsz + \
 150                                 2 /* clientid */ + \
 151                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 154 #define encode_setclientid_confirm_maxsz \
 155                                 (op_encode_hdr_maxsz + \
 156                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 157 #define decode_setclientid_confirm_maxsz \
 158                                 (op_decode_hdr_maxsz)
 159 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 160 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 161 #define encode_share_access_maxsz \
 162                                 (2)
 163 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 164 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 165 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 166 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 167                                 2 + encode_share_access_maxsz + 2 + \
 168                                 open_owner_id_maxsz + \
 169                                 encode_opentype_maxsz + \
 170                                 encode_claim_null_maxsz)
 171 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 172 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 173                                 decode_ace_maxsz)
 174 #define decode_change_info_maxsz        (5)
 175 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 176                                 decode_stateid_maxsz + \
 177                                 decode_change_info_maxsz + 1 + \
 178                                 nfs4_fattr_bitmap_maxsz + \
 179                                 decode_delegation_maxsz)
 180 #define encode_open_confirm_maxsz \
 181                                 (op_encode_hdr_maxsz + \
 182                                  encode_stateid_maxsz + 1)
 183 #define decode_open_confirm_maxsz \
 184                                 (op_decode_hdr_maxsz + \
 185                                  decode_stateid_maxsz)
 186 #define encode_open_downgrade_maxsz \
 187                                 (op_encode_hdr_maxsz + \
 188                                  encode_stateid_maxsz + 1 + \
 189                                  encode_share_access_maxsz)
 190 #define decode_open_downgrade_maxsz \
 191                                 (op_decode_hdr_maxsz + \
 192                                  decode_stateid_maxsz)
 193 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 194                                  1 + encode_stateid_maxsz)
 195 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 196                                  decode_stateid_maxsz)
 197 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 198                                  encode_stateid_maxsz + \
 199                                  encode_attrs_maxsz)
 200 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 201                                  nfs4_fattr_bitmap_maxsz)
 202 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 203                                  encode_stateid_maxsz + 3)
 204 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 205 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 206                                  2 + encode_verifier_maxsz + 5 + \
 207                                 nfs4_label_maxsz)
 208 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 209                                  decode_verifier_maxsz)
 210 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 211 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 212 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 213                                  encode_stateid_maxsz + 4)
 214 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 215                                  2 + decode_verifier_maxsz)
 216 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 217 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 218                                  decode_verifier_maxsz)
 219 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 220                                 nfs4_name_maxsz)
 221 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 222                                  decode_change_info_maxsz)
 223 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 224                                 2 * nfs4_name_maxsz)
 225 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 226                                  decode_change_info_maxsz + \
 227                                  decode_change_info_maxsz)
 228 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 229                                 nfs4_name_maxsz)
 230 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 231 #define encode_lockowner_maxsz  (7)
 232 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 233                                  7 + \
 234                                  1 + encode_stateid_maxsz + 1 + \
 235                                  encode_lockowner_maxsz)
 236 #define decode_lock_denied_maxsz \
 237                                 (8 + decode_lockowner_maxsz)
 238 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 239                                  decode_lock_denied_maxsz)
 240 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 241                                 encode_lockowner_maxsz)
 242 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 243                                  decode_lock_denied_maxsz)
 244 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 245                                  encode_stateid_maxsz + \
 246                                  4)
 247 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 248                                  decode_stateid_maxsz)
 249 #define encode_release_lockowner_maxsz \
 250                                 (op_encode_hdr_maxsz + \
 251                                  encode_lockowner_maxsz)
 252 #define decode_release_lockowner_maxsz \
 253                                 (op_decode_hdr_maxsz)
 254 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 255 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 256 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 257                                 1 + nfs4_name_maxsz + \
 258                                 1 + \
 259                                 nfs4_fattr_maxsz)
 260 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 261 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 262                                 1 + 2 + nfs4_name_maxsz + \
 263                                 encode_attrs_maxsz)
 264 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 265                                 decode_change_info_maxsz + \
 266                                 nfs4_fattr_bitmap_maxsz)
 267 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 268 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 269 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 270 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 271 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 272 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 273                                  nfs4_fattr_bitmap_maxsz + 1)
 274 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 275                                  encode_stateid_maxsz + 3)
 276 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 277 #define encode_fs_locations_maxsz \
 278                                 (encode_getattr_maxsz)
 279 #define decode_fs_locations_maxsz \
 280                                 (0)
 281 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 282 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 283
 284 #if defined(CONFIG_NFS_V4_1)
 285 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 286 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 287                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 288
 289 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 290                                 encode_verifier_maxsz + \
 291                                 1 /* co_ownerid.len */ + \
 292                                 /* eia_clientowner */ \
 293                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 294                                 1 /* flags */ + \
 295                                 1 /* spa_how */ + \
 296                                 /* max is SP4_MACH_CRED (for now) */ + \
 297                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 /* implementation id array of size 1 */ + \
 300                                 1 /* nii_domain */ + \
 301                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 302                                 1 /* nii_name */ + \
 303                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 304                                 3 /* nii_date */)
 305 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 306                                 2 /* eir_clientid */ + \
 307                                 1 /* eir_sequenceid */ + \
 308                                 1 /* eir_flags */ + \
 309                                 1 /* spr_how */ + \
 310                                   /* max is SP4_MACH_CRED (for now) */ + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 2 /* eir_server_owner.so_minor_id */ + \
 314                                 /* eir_server_owner.so_major_id<> */ \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                 /* eir_server_scope<> */ \
 317                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 318                                 1 /* eir_server_impl_id array length */ + \
 319                                 1 /* nii_domain */ + \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                 1 /* nii_name */ + \
 322                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 323                                 3 /* nii_date */)
 324 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 325 #define decode_channel_attrs_maxsz  (6 + \
 326                                      1 /* ca_rdma_ird.len */ + \
 327                                      1 /* ca_rdma_ird */)
 328 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 329                                      2 /* csa_clientid */ + \
 330                                      1 /* csa_sequence */ + \
 331                                      1 /* csa_flags */ + \
 332                                      encode_channel_attrs_maxsz + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      1 /* csa_cb_program */ + \
 335                                      1 /* csa_sec_parms.len (1) */ + \
 336                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 337                                      1 /* stamp */ + \
 338                                      1 /* machinename.len */ + \
 339                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 340                                      1 /* uid */ + \
 341                                      1 /* gid */ + \
 342                                      1 /* gids.len (0) */)
 343 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 344                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 345                                      1 /* csr_sequence */ + \
 346                                      1 /* csr_flags */ + \
 347                                      decode_channel_attrs_maxsz + \
 348                                      decode_channel_attrs_maxsz)
 349 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 350                                      /* bctsa_sessid */ \
 351                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 352                                      1 /* bctsa_dir */ + \
 353                                      1 /* bctsa_use_conn_in_rdma_mode */)
 354 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 355                                      /* bctsr_sessid */ \
 356                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 357                                      1 /* bctsr_dir */ + \
 358                                      1 /* bctsr_use_conn_in_rdma_mode */)
 359 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 360 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 361 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 362 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 363 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 364                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 365 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 366                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 367 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 368 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 369 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 370                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 371                                 1 /* layout type */ + \
 372                                 1 /* maxcount */ + \
 373                                 1 /* bitmap size */ + \
 374                                 1 /* notification bitmap length */ + \
 375                                 1 /* notification bitmap, word 0 */)
 376 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 377                                 1 /* layout type */ + \
 378                                 1 /* opaque devaddr4 length */ + \
 379                                   /* devaddr4 payload is read into page */ \
 380                                 1 /* notification bitmap length */ + \
 381                                 1 /* notification bitmap, word 0 */)
 382 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 383                                 encode_stateid_maxsz)
 384 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 385                                 decode_stateid_maxsz + \
 386                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 387 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 388                                 2 /* offset */ + \
 389                                 2 /* length */ + \
 390                                 1 /* reclaim */ + \
 391                                 encode_stateid_maxsz + \
 392                                 1 /* new offset (true) */ + \
 393                                 2 /* last byte written */ + \
 394                                 1 /* nt_timechanged (false) */ + \
 395                                 1 /* layoutupdate4 layout type */ + \
 396                                 1 /* layoutupdate4 opaqueue len */)
 397                                   /* the actual content of layoutupdate4 should
 398                                      be allocated by drivers and spliced in
 399                                      using xdr_write_pages */
 400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                 encode_stateid_maxsz + \
 403                                 1 + \
 404                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 405 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 406                                 1 + decode_stateid_maxsz)
 407 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 408 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 409 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 410                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 411 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 412 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 413                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 414 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 415 #else /* CONFIG_NFS_V4_1 */
 416 #define encode_sequence_maxsz   0
 417 #define decode_sequence_maxsz   0
 418 #endif /* CONFIG_NFS_V4_1 */
 419
 420 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 421 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 422 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_read_maxsz)
 426 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_read_maxsz)
 430 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 431                                 encode_sequence_maxsz + \
 432                                 encode_putfh_maxsz + \
 433                                 encode_readlink_maxsz)
 434 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 435                                 decode_sequence_maxsz + \
 436                                 decode_putfh_maxsz + \
 437                                 decode_readlink_maxsz)
 438 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 439                                 encode_sequence_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_readdir_maxsz)
 442 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 443                                 decode_sequence_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_readdir_maxsz)
 446 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_write_maxsz + \
 450                                 encode_getattr_maxsz)
 451 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 452                                 decode_sequence_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_write_maxsz + \
 455                                 decode_getattr_maxsz)
 456 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_commit_maxsz)
 460 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 461                                 decode_sequence_maxsz + \
 462                                 decode_putfh_maxsz + \
 463                                 decode_commit_maxsz)
 464 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_open_maxsz + \
 468                                 encode_access_maxsz + \
 469                                 encode_getfh_maxsz + \
 470                                 encode_getattr_maxsz)
 471 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 472                                 decode_sequence_maxsz + \
 473                                 decode_putfh_maxsz + \
 474                                 decode_open_maxsz + \
 475                                 decode_access_maxsz + \
 476                                 decode_getfh_maxsz + \
 477                                 decode_getattr_maxsz)
 478 #define NFS4_enc_open_confirm_sz \
 479                                 (compound_encode_hdr_maxsz + \
 480                                  encode_putfh_maxsz + \
 481                                  encode_open_confirm_maxsz)
 482 #define NFS4_dec_open_confirm_sz \
 483                                 (compound_decode_hdr_maxsz + \
 484                                  decode_putfh_maxsz + \
 485                                  decode_open_confirm_maxsz)
 486 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 487                                         encode_sequence_maxsz + \
 488                                         encode_putfh_maxsz + \
 489                                         encode_open_maxsz + \
 490                                         encode_access_maxsz + \
 491                                         encode_getattr_maxsz)
 492 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 493                                         decode_sequence_maxsz + \
 494                                         decode_putfh_maxsz + \
 495                                         decode_open_maxsz + \
 496                                         decode_access_maxsz + \
 497                                         decode_getattr_maxsz)
 498 #define NFS4_enc_open_downgrade_sz \
 499                                 (compound_encode_hdr_maxsz + \
 500                                  encode_sequence_maxsz + \
 501                                  encode_putfh_maxsz + \
 502                                  encode_open_downgrade_maxsz + \
 503                                  encode_getattr_maxsz)
 504 #define NFS4_dec_open_downgrade_sz \
 505                                 (compound_decode_hdr_maxsz + \
 506                                  decode_sequence_maxsz + \
 507                                  decode_putfh_maxsz + \
 508                                  decode_open_downgrade_maxsz + \
 509                                  decode_getattr_maxsz)
 510 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 511                                  encode_sequence_maxsz + \
 512                                  encode_putfh_maxsz + \
 513                                  encode_close_maxsz + \
 514                                  encode_getattr_maxsz)
 515 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 516                                  decode_sequence_maxsz + \
 517                                  decode_putfh_maxsz + \
 518                                  decode_close_maxsz + \
 519                                  decode_getattr_maxsz)
 520 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 521                                  encode_sequence_maxsz + \
 522                                  encode_putfh_maxsz + \
 523                                  encode_setattr_maxsz + \
 524                                  encode_getattr_maxsz)
 525 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 526                                  decode_sequence_maxsz + \
 527                                  decode_putfh_maxsz + \
 528                                  decode_setattr_maxsz + \
 529                                  decode_getattr_maxsz)
 530 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 531                                 encode_sequence_maxsz + \
 532                                 encode_putfh_maxsz + \
 533                                 encode_fsinfo_maxsz)
 534 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_fsinfo_maxsz)
 538 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 539                                 encode_renew_maxsz)
 540 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 541                                 decode_renew_maxsz)
 542 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 543                                 encode_setclientid_maxsz)
 544 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 545                                 decode_setclientid_maxsz)
 546 #define NFS4_enc_setclientid_confirm_sz \
 547                                 (compound_encode_hdr_maxsz + \
 548                                 encode_setclientid_confirm_maxsz)
 549 #define NFS4_dec_setclientid_confirm_sz \
 550                                 (compound_decode_hdr_maxsz + \
 551                                 decode_setclientid_confirm_maxsz)
 552 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 553                                 encode_sequence_maxsz + \
 554                                 encode_putfh_maxsz + \
 555                                 encode_lock_maxsz)
 556 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 557                                 decode_sequence_maxsz + \
 558                                 decode_putfh_maxsz + \
 559                                 decode_lock_maxsz)
 560 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 561                                 encode_sequence_maxsz + \
 562                                 encode_putfh_maxsz + \
 563                                 encode_lockt_maxsz)
 564 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 565                                  decode_sequence_maxsz + \
 566                                  decode_putfh_maxsz + \
 567                                  decode_lockt_maxsz)
 568 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 569                                 encode_sequence_maxsz + \
 570                                 encode_putfh_maxsz + \
 571                                 encode_locku_maxsz)
 572 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 573                                 decode_sequence_maxsz + \
 574                                 decode_putfh_maxsz + \
 575                                 decode_locku_maxsz)
 576 #define NFS4_enc_release_lockowner_sz \
 577                                 (compound_encode_hdr_maxsz + \
 578                                  encode_lockowner_maxsz)
 579 #define NFS4_dec_release_lockowner_sz \
 580                                 (compound_decode_hdr_maxsz + \
 581                                  decode_lockowner_maxsz)
 582 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 583                                 encode_sequence_maxsz + \
 584                                 encode_putfh_maxsz + \
 585                                 encode_access_maxsz + \
 586                                 encode_getattr_maxsz)
 587 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 588                                 decode_sequence_maxsz + \
 589                                 decode_putfh_maxsz + \
 590                                 decode_access_maxsz + \
 591                                 decode_getattr_maxsz)
 592 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 593                                 encode_sequence_maxsz + \
 594                                 encode_putfh_maxsz + \
 595                                 encode_getattr_maxsz + \
 596                                 encode_renew_maxsz)
 597 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 598                                 decode_sequence_maxsz + \
 599                                 decode_putfh_maxsz + \
 600                                 decode_getattr_maxsz + \
 601                                 decode_renew_maxsz)
 602 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 603                                 encode_sequence_maxsz + \
 604                                 encode_putfh_maxsz + \
 605                                 encode_lookup_maxsz + \
 606                                 encode_getattr_maxsz + \
 607                                 encode_getfh_maxsz)
 608 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_lookup_maxsz + \
 612                                 decode_getattr_maxsz + \
 613                                 decode_getfh_maxsz)
 614 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 615                                 encode_sequence_maxsz + \
 616                                 encode_putrootfh_maxsz + \
 617                                 encode_getattr_maxsz + \
 618                                 encode_getfh_maxsz)
 619 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 620                                 decode_sequence_maxsz + \
 621                                 decode_putrootfh_maxsz + \
 622                                 decode_getattr_maxsz + \
 623                                 decode_getfh_maxsz)
 624 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 625                                 encode_sequence_maxsz + \
 626                                 encode_putfh_maxsz + \
 627                                 encode_remove_maxsz)
 628 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 629                                 decode_sequence_maxsz + \
 630                                 decode_putfh_maxsz + \
 631                                 decode_remove_maxsz)
 632 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 633                                 encode_sequence_maxsz + \
 634                                 encode_putfh_maxsz + \
 635                                 encode_savefh_maxsz + \
 636                                 encode_putfh_maxsz + \
 637                                 encode_rename_maxsz)
 638 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 639                                 decode_sequence_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_savefh_maxsz + \
 642                                 decode_putfh_maxsz + \
 643                                 decode_rename_maxsz)
 644 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 645                                 encode_sequence_maxsz + \
 646                                 encode_putfh_maxsz + \
 647                                 encode_savefh_maxsz + \
 648                                 encode_putfh_maxsz + \
 649                                 encode_link_maxsz + \
 650                                 encode_restorefh_maxsz + \
 651                                 encode_getattr_maxsz)
 652 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 653                                 decode_sequence_maxsz + \
 654                                 decode_putfh_maxsz + \
 655                                 decode_savefh_maxsz + \
 656                                 decode_putfh_maxsz + \
 657                                 decode_link_maxsz + \
 658                                 decode_restorefh_maxsz + \
 659                                 decode_getattr_maxsz)
 660 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_symlink_maxsz + \
 664                                 encode_getattr_maxsz + \
 665                                 encode_getfh_maxsz)
 666 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 667                                 decode_sequence_maxsz + \
 668                                 decode_putfh_maxsz + \
 669                                 decode_symlink_maxsz + \
 670                                 decode_getattr_maxsz + \
 671                                 decode_getfh_maxsz)
 672 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 673                                 encode_sequence_maxsz + \
 674                                 encode_putfh_maxsz + \
 675                                 encode_create_maxsz + \
 676                                 encode_getfh_maxsz + \
 677                                 encode_getattr_maxsz)
 678 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 679                                 decode_sequence_maxsz + \
 680                                 decode_putfh_maxsz + \
 681                                 decode_create_maxsz + \
 682                                 decode_getfh_maxsz + \
 683                                 decode_getattr_maxsz)
 684 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_getattr_maxsz)
 688 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 689                                 decode_sequence_maxsz + \
 690                                 decode_putfh_maxsz + \
 691                                 decode_getattr_maxsz)
 692 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 693                                 encode_sequence_maxsz + \
 694                                 encode_putfh_maxsz + \
 695                                 encode_statfs_maxsz)
 696 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 697                                 decode_sequence_maxsz + \
 698                                 decode_putfh_maxsz + \
 699                                 decode_statfs_maxsz)
 700 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 701                                 encode_sequence_maxsz + \
 702                                 encode_putfh_maxsz + \
 703                                 encode_getattr_maxsz)
 704 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 705                                 decode_sequence_maxsz + \
 706                                 decode_putfh_maxsz + \
 707                                 decode_getattr_maxsz)
 708 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_delegreturn_maxsz + \
 712                                 encode_getattr_maxsz)
 713 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 714                                 decode_sequence_maxsz + \
 715                                 decode_delegreturn_maxsz + \
 716                                 decode_getattr_maxsz)
 717 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 718                                 encode_sequence_maxsz + \
 719                                 encode_putfh_maxsz + \
 720                                 encode_getacl_maxsz)
 721 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 722                                 decode_sequence_maxsz + \
 723                                 decode_putfh_maxsz + \
 724                                 decode_getacl_maxsz)
 725 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_setacl_maxsz)
 729 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_setacl_maxsz)
 733 #define NFS4_enc_fs_locations_sz \
 734                                 (compound_encode_hdr_maxsz + \
 735                                  encode_sequence_maxsz + \
 736                                  encode_putfh_maxsz + \
 737                                  encode_lookup_maxsz + \
 738                                  encode_fs_locations_maxsz + \
 739                                  encode_renew_maxsz)
 740 #define NFS4_dec_fs_locations_sz \
 741                                 (compound_decode_hdr_maxsz + \
 742                                  decode_sequence_maxsz + \
 743                                  decode_putfh_maxsz + \
 744                                  decode_lookup_maxsz + \
 745                                  decode_fs_locations_maxsz + \
 746                                  decode_renew_maxsz)
 747 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 748                                 encode_sequence_maxsz + \
 749                                 encode_putfh_maxsz + \
 750                                 encode_secinfo_maxsz)
 751 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 752                                 decode_sequence_maxsz + \
 753                                 decode_putfh_maxsz + \
 754                                 decode_secinfo_maxsz)
 755 #define NFS4_enc_fsid_present_sz \
 756                                 (compound_encode_hdr_maxsz + \
 757                                  encode_sequence_maxsz + \
 758                                  encode_putfh_maxsz + \
 759                                  encode_getfh_maxsz + \
 760                                  encode_renew_maxsz)
 761 #define NFS4_dec_fsid_present_sz \
 762                                 (compound_decode_hdr_maxsz + \
 763                                  decode_sequence_maxsz + \
 764                                  decode_putfh_maxsz + \
 765                                  decode_getfh_maxsz + \
 766                                  decode_renew_maxsz)
 767 #if defined(CONFIG_NFS_V4_1)
 768 #define NFS4_enc_bind_conn_to_session_sz \
 769                                 (compound_encode_hdr_maxsz + \
 770                                  encode_bind_conn_to_session_maxsz)
 771 #define NFS4_dec_bind_conn_to_session_sz \
 772                                 (compound_decode_hdr_maxsz + \
 773                                  decode_bind_conn_to_session_maxsz)
 774 #define NFS4_enc_exchange_id_sz \
 775                                 (compound_encode_hdr_maxsz + \
 776                                  encode_exchange_id_maxsz)
 777 #define NFS4_dec_exchange_id_sz \
 778                                 (compound_decode_hdr_maxsz + \
 779                                  decode_exchange_id_maxsz)
 780 #define NFS4_enc_create_session_sz \
 781                                 (compound_encode_hdr_maxsz + \
 782                                  encode_create_session_maxsz)
 783 #define NFS4_dec_create_session_sz \
 784                                 (compound_decode_hdr_maxsz + \
 785                                  decode_create_session_maxsz)
 786 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 787                                          encode_destroy_session_maxsz)
 788 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 789                                          decode_destroy_session_maxsz)
 790 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 791                                          encode_destroy_clientid_maxsz)
 792 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 793                                          decode_destroy_clientid_maxsz)
 794 #define NFS4_enc_sequence_sz \
 795                                 (compound_decode_hdr_maxsz + \
 796                                  encode_sequence_maxsz)
 797 #define NFS4_dec_sequence_sz \
 798                                 (compound_decode_hdr_maxsz + \
 799                                  decode_sequence_maxsz)
 800 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 801                                          encode_sequence_maxsz + \
 802                                          encode_putrootfh_maxsz + \
 803                                          encode_fsinfo_maxsz)
 804 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 805                                          decode_sequence_maxsz + \
 806                                          decode_putrootfh_maxsz + \
 807                                          decode_fsinfo_maxsz)
 808 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 809                                          encode_sequence_maxsz + \
 810                                          encode_reclaim_complete_maxsz)
 811 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 812                                          decode_sequence_maxsz + \
 813                                          decode_reclaim_complete_maxsz)
 814 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 815                                 encode_sequence_maxsz +\
 816                                 encode_getdeviceinfo_maxsz)
 817 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 818                                 decode_sequence_maxsz + \
 819                                 decode_getdeviceinfo_maxsz)
 820 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 821                                 encode_sequence_maxsz + \
 822                                 encode_putfh_maxsz +        \
 823                                 encode_layoutget_maxsz)
 824 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 825                                 decode_sequence_maxsz + \
 826                                 decode_putfh_maxsz +        \
 827                                 decode_layoutget_maxsz)
 828 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 829                                 encode_sequence_maxsz +\
 830                                 encode_putfh_maxsz + \
 831                                 encode_layoutcommit_maxsz + \
 832                                 encode_getattr_maxsz)
 833 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 834                                 decode_sequence_maxsz + \
 835                                 decode_putfh_maxsz + \
 836                                 decode_layoutcommit_maxsz + \
 837                                 decode_getattr_maxsz)
 838 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 839                                 encode_sequence_maxsz + \
 840                                 encode_putfh_maxsz + \
 841                                 encode_layoutreturn_maxsz)
 842 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 843                                 decode_sequence_maxsz + \
 844                                 decode_putfh_maxsz + \
 845                                 decode_layoutreturn_maxsz)
 846 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 847                                         encode_sequence_maxsz + \
 848                                         encode_putrootfh_maxsz +\
 849                                         encode_secinfo_no_name_maxsz)
 850 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 851                                         decode_sequence_maxsz + \
 852                                         decode_putrootfh_maxsz + \
 853                                         decode_secinfo_no_name_maxsz)
 854 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 855                                          encode_sequence_maxsz + \
 856                                          encode_test_stateid_maxsz)
 857 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 858                                          decode_sequence_maxsz + \
 859                                          decode_test_stateid_maxsz)
 860 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 861                                          encode_sequence_maxsz + \
 862                                          encode_free_stateid_maxsz)
 863 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 864                                          decode_sequence_maxsz + \
 865                                          decode_free_stateid_maxsz)
 866
 867 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 868                                       compound_encode_hdr_maxsz +
 869                                       encode_sequence_maxsz +
 870                                       encode_putfh_maxsz +
 871                                       encode_getattr_maxsz) *
 872                                      XDR_UNIT);
 873
 874 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 875                                      compound_decode_hdr_maxsz +
 876                                      decode_sequence_maxsz +
 877                                      decode_putfh_maxsz) *
 878                                     XDR_UNIT);
 879
 880 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 881                                            compound_decode_hdr_maxsz +
 882                                            decode_sequence_maxsz) *
 883                                           XDR_UNIT);
 884 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 885 #endif /* CONFIG_NFS_V4_1 */
 886
 887 static const umode_t nfs_type2fmt[] = {
 888         [NF4BAD] = 0,
 889         [NF4REG] = S_IFREG,
 890         [NF4DIR] = S_IFDIR,
 891         [NF4BLK] = S_IFBLK,
 892         [NF4CHR] = S_IFCHR,
 893         [NF4LNK] = S_IFLNK,
 894         [NF4SOCK] = S_IFSOCK,
 895         [NF4FIFO] = S_IFIFO,
 896         [NF4ATTRDIR] = 0,
 897         [NF4NAMEDATTR] = 0,
 898 };
 899
 900 struct compound_hdr {
 901         int32_t         status;
 902         uint32_t        nops;
 903         __be32 *        nops_p;
 904         uint32_t        taglen;
 905         char *          tag;
 906         uint32_t        replen;         /* expected reply words */
 907         u32             minorversion;
 908 };
 909
 910 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 911 {
 912         __be32 *p = xdr_reserve_space(xdr, nbytes);
 913         BUG_ON(!p);
 914         return p;
 915 }
 916
 917 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 918 {
 919         __be32 *p;
 920
 921         p = xdr_reserve_space(xdr, len);
 922         xdr_encode_opaque_fixed(p, buf, len);
 923 }
 924
 925 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 926 {
 927         __be32 *p;
 928
 929         p = reserve_space(xdr, 4 + len);
 930         xdr_encode_opaque(p, str, len);
 931 }
 932
 933 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 934 {
 935         __be32 *p;
 936
 937         p = reserve_space(xdr, 4);
 938         *p = cpu_to_be32(n);
 939 }
 940
 941 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 942 {
 943         __be32 *p;
 944
 945         p = reserve_space(xdr, 8);
 946         xdr_encode_hyper(p, n);
 947 }
 948
 949 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 950                 const struct nfs_seqid *seqid)
 951 {
 952         if (seqid != NULL)
 953                 encode_uint32(xdr, seqid->sequence->counter);
 954         else
 955                 encode_uint32(xdr, 0);
 956 }
 957
 958 static void encode_compound_hdr(struct xdr_stream *xdr,
 959                                 struct rpc_rqst *req,
 960                                 struct compound_hdr *hdr)
 961 {
 962         __be32 *p;
 963         struct rpc_auth *auth = req->rq_cred->cr_auth;
 964
 965         /* initialize running count of expected bytes in reply.
 966          * NOTE: the replied tag SHOULD be the same is the one sent,
 967          * but this is not required as a MUST for the server to do so. */
 968         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 969
 970         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 971         encode_string(xdr, hdr->taglen, hdr->tag);
 972         p = reserve_space(xdr, 8);
 973         *p++ = cpu_to_be32(hdr->minorversion);
 974         hdr->nops_p = p;
 975         *p = cpu_to_be32(hdr->nops);
 976 }
 977
 978 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 979                 uint32_t replen,
 980                 struct compound_hdr *hdr)
 981 {
 982         encode_uint32(xdr, op);
 983         hdr->nops++;
 984         hdr->replen += replen;
 985 }
 986
 987 static void encode_nops(struct compound_hdr *hdr)
 988 {
 989         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 990         *hdr->nops_p = htonl(hdr->nops);
 991 }
 992
 993 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 994 {
 995         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 996 }
 997
 998 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 999 {
1000         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1001 }
1002
1003 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1004                                 const struct nfs4_label *label,
1005                                 const struct nfs_server *server,
1006                                 bool excl_check)
1007 {
1008         char owner_name[IDMAP_NAMESZ];
1009         char owner_group[IDMAP_NAMESZ];
1010         int owner_namelen = 0;
1011         int owner_grouplen = 0;
1012         __be32 *p;
1013         unsigned i;
1014         uint32_t len = 0;
1015         uint32_t bmval_len;
1016         uint32_t bmval[3] = { 0 };
1017
1018         /*
1019          * We reserve enough space to write the entire attribute buffer at once.
1020          * In the worst-case, this would be
1021          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1022          * = 40 bytes, plus any contribution from variable-length fields
1023          *            such as owner/group.
1024          */
1025         if (iap->ia_valid & ATTR_SIZE) {
1026                 bmval[0] |= FATTR4_WORD0_SIZE;
1027                 len += 8;
1028         }
1029         if (iap->ia_valid & ATTR_MODE) {
1030                 bmval[1] |= FATTR4_WORD1_MODE;
1031                 len += 4;
1032         }
1033         if (iap->ia_valid & ATTR_UID) {
1034                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035                 if (owner_namelen < 0) {
1036                         dprintk("nfs: couldn't resolve uid %d to string\n",
1037                                         from_kuid(&init_user_ns, iap->ia_uid));
1038                         /* XXX */
1039                         strcpy(owner_name, "nobody");
1040                         owner_namelen = sizeof("nobody") - 1;
1041                         /* goto out; */
1042                 }
1043                 bmval[1] |= FATTR4_WORD1_OWNER;
1044                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045         }
1046         if (iap->ia_valid & ATTR_GID) {
1047                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1048                 if (owner_grouplen < 0) {
1049                         dprintk("nfs: couldn't resolve gid %d to string\n",
1050                                         from_kgid(&init_user_ns, iap->ia_gid));
1051                         strcpy(owner_group, "nobody");
1052                         owner_grouplen = sizeof("nobody") - 1;
1053                         /* goto out; */
1054                 }
1055                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1056                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1057         }
1058         if (iap->ia_valid & ATTR_ATIME_SET) {
1059                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 len += 16;
1061         } else if (iap->ia_valid & ATTR_ATIME) {
1062                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 len += 4;
1064         }
1065         if (iap->ia_valid & ATTR_MTIME_SET) {
1066                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1067                 len += 16;
1068         } else if (iap->ia_valid & ATTR_MTIME) {
1069                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070                 len += 4;
1071         }
1072
1073         if (excl_check) {
1074                 const u32 *excl_bmval = server->exclcreat_bitmask;
1075                 bmval[0] &= excl_bmval[0];
1076                 bmval[1] &= excl_bmval[1];
1077                 bmval[2] &= excl_bmval[2];
1078
1079                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1080                         label = NULL;
1081         }
1082
1083         if (label) {
1084                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1085                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1086         }
1087
1088         if (bmval[2] != 0)
1089                 bmval_len = 3;
1090         else if (bmval[1] != 0)
1091                 bmval_len = 2;
1092         else
1093                 bmval_len = 1;
1094
1095         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1096
1097         *p++ = cpu_to_be32(bmval_len);
1098         for (i = 0; i < bmval_len; i++)
1099                 *p++ = cpu_to_be32(bmval[i]);
1100         *p++ = cpu_to_be32(len);
1101
1102         if (bmval[0] & FATTR4_WORD0_SIZE)
1103                 p = xdr_encode_hyper(p, iap->ia_size);
1104         if (bmval[1] & FATTR4_WORD1_MODE)
1105                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1106         if (bmval[1] & FATTR4_WORD1_OWNER)
1107                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1108         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1109                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1110         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111                 if (iap->ia_valid & ATTR_ATIME_SET) {
1112                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1114                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1115                 } else
1116                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117         }
1118         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1119                 if (iap->ia_valid & ATTR_MTIME_SET) {
1120                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1121                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1122                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1123                 } else
1124                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1125         }
1126         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1127                 *p++ = cpu_to_be32(label->lfs);
1128                 *p++ = cpu_to_be32(label->pi);
1129                 *p++ = cpu_to_be32(label->len);
1130                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1131         }
1132
1133 /* out: */
1134 }
1135
1136 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1137 {
1138         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1139         encode_uint32(xdr, access);
1140 }
1141
1142 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1143 {
1144         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1145         encode_nfs4_seqid(xdr, arg->seqid);
1146         encode_nfs4_stateid(xdr, &arg->stateid);
1147 }
1148
1149 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1150 {
1151         __be32 *p;
1152
1153         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1154         p = reserve_space(xdr, 12);
1155         p = xdr_encode_hyper(p, args->offset);
1156         *p = cpu_to_be32(args->count);
1157 }
1158
1159 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1160 {
1161         __be32 *p;
1162
1163         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1164         encode_uint32(xdr, create->ftype);
1165
1166         switch (create->ftype) {
1167         case NF4LNK:
1168                 p = reserve_space(xdr, 4);
1169                 *p = cpu_to_be32(create->u.symlink.len);
1170                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1171                                 create->u.symlink.len);
1172                 xdr->buf->flags |= XDRBUF_WRITE;
1173                 break;
1174
1175         case NF4BLK: case NF4CHR:
1176                 p = reserve_space(xdr, 8);
1177                 *p++ = cpu_to_be32(create->u.device.specdata1);
1178                 *p = cpu_to_be32(create->u.device.specdata2);
1179                 break;
1180
1181         default:
1182                 break;
1183         }
1184
1185         encode_string(xdr, create->name->len, create->name->name);
1186         encode_attrs(xdr, create->attrs, create->label, create->server, false);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194         p = reserve_space(xdr, 8);
1195         *p++ = cpu_to_be32(1);
1196         *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204         p = reserve_space(xdr, 12);
1205         *p++ = cpu_to_be32(2);
1206         *p++ = cpu_to_be32(bm0);
1207         *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213                      struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         if (bm2) {
1219                 p = reserve_space(xdr, 16);
1220                 *p++ = cpu_to_be32(3);
1221                 *p++ = cpu_to_be32(bm0);
1222                 *p++ = cpu_to_be32(bm1);
1223                 *p = cpu_to_be32(bm2);
1224         } else if (bm1) {
1225                 p = reserve_space(xdr, 12);
1226                 *p++ = cpu_to_be32(2);
1227                 *p++ = cpu_to_be32(bm0);
1228                 *p = cpu_to_be32(bm1);
1229         } else {
1230                 p = reserve_space(xdr, 8);
1231                 *p++ = cpu_to_be32(1);
1232                 *p = cpu_to_be32(bm0);
1233         }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239                            bitmask[1] & nfs4_fattr_bitmap[1],
1240                            bitmask[2] & nfs4_fattr_bitmap[2],
1241                            hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245                                  const u32 *open_bitmap,
1246                                  struct compound_hdr *hdr)
1247 {
1248         encode_getattr_three(xdr,
1249                              bitmask[0] & open_bitmap[0],
1250                              bitmask[1] & open_bitmap[1],
1251                              bitmask[2] & open_bitmap[2],
1252                              hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257         encode_getattr_three(xdr,
1258                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1259                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1260                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1261                              hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278         encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283         if (fl->fl_type == F_RDLCK)
1284                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290         if (fl->fl_end == OFFSET_MAX)
1291                 return ~(uint64_t)0;
1292         return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297         __be32 *p;
1298
1299         p = reserve_space(xdr, 32);
1300         p = xdr_encode_hyper(p, lowner->clientid);
1301         *p++ = cpu_to_be32(20);
1302         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303         *p++ = cpu_to_be32(lowner->s_dev);
1304         xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310  */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313         __be32 *p;
1314
1315         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316         p = reserve_space(xdr, 28);
1317         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318         *p++ = cpu_to_be32(args->reclaim);
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         *p = cpu_to_be32(args->new_lock_owner);
1322         if (args->new_lock_owner){
1323                 encode_nfs4_seqid(xdr, args->open_seqid);
1324                 encode_nfs4_stateid(xdr, &args->open_stateid);
1325                 encode_nfs4_seqid(xdr, args->lock_seqid);
1326                 encode_lockowner(xdr, &args->lock_owner);
1327         }
1328         else {
1329                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330                 encode_nfs4_seqid(xdr, args->lock_seqid);
1331         }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336         __be32 *p;
1337
1338         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339         p = reserve_space(xdr, 20);
1340         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341         p = xdr_encode_hyper(p, args->fl->fl_start);
1342         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343         encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348         __be32 *p;
1349
1350         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352         encode_nfs4_seqid(xdr, args->seqid);
1353         encode_nfs4_stateid(xdr, &args->stateid);
1354         p = reserve_space(xdr, 16);
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362         encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368         encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373         __be32 *p;
1374
1375         p = reserve_space(xdr, 8);
1376         *p++ = cpu_to_be32(share_access);
1377         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382         __be32 *p;
1383  /*
1384  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385  * owner 4 = 32
1386  */
1387         encode_nfs4_seqid(xdr, arg->seqid);
1388         encode_share_access(xdr, arg->share_access);
1389         p = reserve_space(xdr, 36);
1390         p = xdr_encode_hyper(p, arg->clientid);
1391         *p++ = cpu_to_be32(24);
1392         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393         *p++ = cpu_to_be32(arg->server->s_dev);
1394         *p++ = cpu_to_be32(arg->id.uniquifier);
1395         xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch(arg->createmode) {
1404         case NFS4_CREATE_UNCHECKED:
1405                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1407                 break;
1408         case NFS4_CREATE_GUARDED:
1409                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1410                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1411                 break;
1412         case NFS4_CREATE_EXCLUSIVE:
1413                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1414                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415                 break;
1416         case NFS4_CREATE_EXCLUSIVE4_1:
1417                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1418                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1419                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true);
1420         }
1421 }
1422
1423 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 4);
1428         switch (arg->open_flags & O_CREAT) {
1429         case 0:
1430                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431                 break;
1432         default:
1433                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434                 encode_createmode(xdr, arg);
1435         }
1436 }
1437
1438 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4);
1443         switch (delegation_type) {
1444         case 0:
1445                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446                 break;
1447         case FMODE_READ:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449                 break;
1450         case FMODE_WRITE|FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452                 break;
1453         default:
1454                 BUG();
1455         }
1456 }
1457
1458 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459 {
1460         __be32 *p;
1461
1462         p = reserve_space(xdr, 4);
1463         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464         encode_string(xdr, name->len, name->name);
1465 }
1466
1467 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4);
1472         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473         encode_delegation_type(xdr, type);
1474 }
1475
1476 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477 {
1478         __be32 *p;
1479
1480         p = reserve_space(xdr, 4);
1481         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482         encode_nfs4_stateid(xdr, stateid);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_fh(struct xdr_stream *xdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492 }
1493
1494 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495 {
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500         encode_nfs4_stateid(xdr, stateid);
1501 }
1502
1503 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504 {
1505         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506         encode_openhdr(xdr, arg);
1507         encode_opentype(xdr, arg);
1508         switch (arg->claim) {
1509         case NFS4_OPEN_CLAIM_NULL:
1510                 encode_claim_null(xdr, arg->name);
1511                 break;
1512         case NFS4_OPEN_CLAIM_PREVIOUS:
1513                 encode_claim_previous(xdr, arg->u.delegation_type);
1514                 break;
1515         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517                 break;
1518         case NFS4_OPEN_CLAIM_FH:
1519                 encode_claim_fh(xdr);
1520                 break;
1521         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523                 break;
1524         default:
1525                 BUG();
1526         }
1527 }
1528
1529 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530 {
1531         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532         encode_nfs4_stateid(xdr, arg->stateid);
1533         encode_nfs4_seqid(xdr, arg->seqid);
1534 }
1535
1536 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539         encode_nfs4_stateid(xdr, &arg->stateid);
1540         encode_nfs4_seqid(xdr, arg->seqid);
1541         encode_share_access(xdr, arg->share_access);
1542 }
1543
1544 static void
1545 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546 {
1547         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548         encode_string(xdr, fh->size, fh->data);
1549 }
1550
1551 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554 }
1555
1556 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1557                         struct compound_hdr *hdr)
1558 {
1559         __be32 *p;
1560
1561         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1562         encode_nfs4_stateid(xdr, &args->stateid);
1563
1564         p = reserve_space(xdr, 12);
1565         p = xdr_encode_hyper(p, args->offset);
1566         *p = cpu_to_be32(args->count);
1567 }
1568
1569 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1570 {
1571         uint32_t attrs[3] = {
1572                 FATTR4_WORD0_RDATTR_ERROR,
1573                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1574         };
1575         uint32_t dircount = readdir->count >> 1;
1576         __be32 *p, verf[2];
1577         uint32_t attrlen = 0;
1578         unsigned int i;
1579
1580         if (readdir->plus) {
1581                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1582                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1583                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1584                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1585                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1586                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1587                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1588                 dircount >>= 1;
1589         }
1590         /* Use mounted_on_fileid only if the server supports it */
1591         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1592                 attrs[0] |= FATTR4_WORD0_FILEID;
1593         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1594                 attrs[i] &= readdir->bitmask[i];
1595                 if (attrs[i] != 0)
1596                         attrlen = i+1;
1597         }
1598
1599         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1600         encode_uint64(xdr, readdir->cookie);
1601         encode_nfs4_verifier(xdr, &readdir->verifier);
1602         p = reserve_space(xdr, 12 + (attrlen << 2));
1603         *p++ = cpu_to_be32(dircount);
1604         *p++ = cpu_to_be32(readdir->count);
1605         *p++ = cpu_to_be32(attrlen);
1606         for (i = 0; i < attrlen; i++)
1607                 *p++ = cpu_to_be32(attrs[i]);
1608         memcpy(verf, readdir->verifier.data, sizeof(verf));
1609
1610         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1611                         __func__,
1612                         (unsigned long long)readdir->cookie,
1613                         verf[0], verf[1],
1614                         attrs[0] & readdir->bitmask[0],
1615                         attrs[1] & readdir->bitmask[1],
1616                         attrs[2] & readdir->bitmask[2]);
1617 }
1618
1619 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1620 {
1621         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1622 }
1623
1624 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1625 {
1626         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1627         encode_string(xdr, name->len, name->name);
1628 }
1629
1630 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1633         encode_string(xdr, oldname->len, oldname->name);
1634         encode_string(xdr, newname->len, newname->name);
1635 }
1636
1637 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1638                          struct compound_hdr *hdr)
1639 {
1640         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1641         encode_uint64(xdr, clid);
1642 }
1643
1644 static void
1645 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1646 {
1647         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1648 }
1649
1650 static void
1651 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1652 {
1653         __be32 *p;
1654
1655         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1656         encode_nfs4_stateid(xdr, &zero_stateid);
1657         p = reserve_space(xdr, 2*4);
1658         *p++ = cpu_to_be32(1);
1659         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1660         p = reserve_space(xdr, 4);
1661         *p = cpu_to_be32(arg->acl_len);
1662         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1663 }
1664
1665 static void
1666 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1669 }
1670
1671 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1672 {
1673         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1674         encode_nfs4_stateid(xdr, &arg->stateid);
1675         encode_attrs(xdr, arg->iap, arg->label, server, false);
1676 }
1677
1678 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1679 {
1680         __be32 *p;
1681
1682         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1683         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1684
1685         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1686                         setclientid->sc_clnt->cl_owner_id);
1687         p = reserve_space(xdr, 4);
1688         *p = cpu_to_be32(setclientid->sc_prog);
1689         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1690         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1691         p = reserve_space(xdr, 4);
1692         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1693 }
1694
1695 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1696 {
1697         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1698                         decode_setclientid_confirm_maxsz, hdr);
1699         encode_uint64(xdr, arg->clientid);
1700         encode_nfs4_verifier(xdr, &arg->confirm);
1701 }
1702
1703 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1704                          struct compound_hdr *hdr)
1705 {
1706         __be32 *p;
1707
1708         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1709         encode_nfs4_stateid(xdr, &args->stateid);
1710
1711         p = reserve_space(xdr, 16);
1712         p = xdr_encode_hyper(p, args->offset);
1713         *p++ = cpu_to_be32(args->stable);
1714         *p = cpu_to_be32(args->count);
1715
1716         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1717 }
1718
1719 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1720 {
1721         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1722         encode_nfs4_stateid(xdr, stateid);
1723 }
1724
1725 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1726 {
1727         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1728         encode_string(xdr, name->len, name->name);
1729 }
1730
1731 #if defined(CONFIG_NFS_V4_1)
1732 /* NFSv4.1 operations */
1733 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1734                                    struct nfs41_bind_conn_to_session_args *args,
1735                                    struct compound_hdr *hdr)
1736 {
1737         __be32 *p;
1738
1739         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1740                 decode_bind_conn_to_session_maxsz, hdr);
1741         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1742         p = xdr_reserve_space(xdr, 8);
1743         *p++ = cpu_to_be32(args->dir);
1744         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1745 }
1746
1747 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1748 {
1749         unsigned int i;
1750         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1751         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1752                 encode_uint32(xdr, op_map->u.words[i]);
1753 }
1754
1755 static void encode_exchange_id(struct xdr_stream *xdr,
1756                                struct nfs41_exchange_id_args *args,
1757                                struct compound_hdr *hdr)
1758 {
1759         __be32 *p;
1760         char impl_name[IMPL_NAME_LIMIT];
1761         int len = 0;
1762
1763         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1764         encode_nfs4_verifier(xdr, args->verifier);
1765
1766         encode_string(xdr, strlen(args->client->cl_owner_id),
1767                         args->client->cl_owner_id);
1768
1769         encode_uint32(xdr, args->flags);
1770         encode_uint32(xdr, args->state_protect.how);
1771
1772         switch (args->state_protect.how) {
1773         case SP4_NONE:
1774                 break;
1775         case SP4_MACH_CRED:
1776                 encode_op_map(xdr, &args->state_protect.enforce);
1777                 encode_op_map(xdr, &args->state_protect.allow);
1778                 break;
1779         default:
1780                 WARN_ON_ONCE(1);
1781                 break;
1782         }
1783
1784         if (send_implementation_id &&
1785             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787                 <= sizeof(impl_name) + 1)
1788                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789                                utsname()->sysname, utsname()->release,
1790                                utsname()->version, utsname()->machine);
1791
1792         if (len > 0) {
1793                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1794
1795                 encode_string(xdr,
1796                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798                 encode_string(xdr, len, impl_name);
1799                 /* just send zeros for nii_date - the date is in nii_name */
1800                 p = reserve_space(xdr, 12);
1801                 p = xdr_encode_hyper(p, 0);
1802                 *p = cpu_to_be32(0);
1803         } else
1804                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808                                   struct nfs41_create_session_args *args,
1809                                   struct compound_hdr *hdr)
1810 {
1811         __be32 *p;
1812         struct nfs_client *clp = args->client;
1813         struct rpc_clnt *clnt = clp->cl_rpcclient;
1814         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1815         u32 max_resp_sz_cached;
1816
1817         /*
1818          * Assumes OPEN is the biggest non-idempotent compound.
1819          * 2 is the verifier.
1820          */
1821         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1822                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1823
1824         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1825         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1826         p = xdr_encode_hyper(p, args->clientid);
1827         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1828         *p++ = cpu_to_be32(args->flags);                        /*flags */
1829
1830         /* Fore Channel */
1831         *p++ = cpu_to_be32(0);                          /* header padding size */
1832         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1833         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1834         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1835         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1836         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1837         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1838
1839         /* Back Channel */
1840         *p++ = cpu_to_be32(0);                          /* header padding size */
1841         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1842         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1843         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1844         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1845         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1846         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1847
1848         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1849         *p++ = cpu_to_be32(1);
1850         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1851
1852         /* authsys_parms rfc1831 */
1853         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1854         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1855         *p++ = cpu_to_be32(0);                          /* UID */
1856         *p++ = cpu_to_be32(0);                          /* GID */
1857         *p = cpu_to_be32(0);                            /* No more gids */
1858 }
1859
1860 static void encode_destroy_session(struct xdr_stream *xdr,
1861                                    struct nfs4_session *session,
1862                                    struct compound_hdr *hdr)
1863 {
1864         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1865         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866 }
1867
1868 static void encode_destroy_clientid(struct xdr_stream *xdr,
1869                                    uint64_t clientid,
1870                                    struct compound_hdr *hdr)
1871 {
1872         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1873         encode_uint64(xdr, clientid);
1874 }
1875
1876 static void encode_reclaim_complete(struct xdr_stream *xdr,
1877                                     struct nfs41_reclaim_complete_args *args,
1878                                     struct compound_hdr *hdr)
1879 {
1880         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1881         encode_uint32(xdr, args->one_fs);
1882 }
1883 #endif /* CONFIG_NFS_V4_1 */
1884
1885 static void encode_sequence(struct xdr_stream *xdr,
1886                             const struct nfs4_sequence_args *args,
1887                             struct compound_hdr *hdr)
1888 {
1889 #if defined(CONFIG_NFS_V4_1)
1890         struct nfs4_session *session;
1891         struct nfs4_slot_table *tp;
1892         struct nfs4_slot *slot = args->sa_slot;
1893         __be32 *p;
1894
1895         tp = slot->table;
1896         session = tp->session;
1897         if (!session)
1898                 return;
1899
1900         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1901
1902         /*
1903          * Sessionid + seqid + slotid + max slotid + cache_this
1904          */
1905         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1906                 "max_slotid=%d cache_this=%d\n",
1907                 __func__,
1908                 ((u32 *)session->sess_id.data)[0],
1909                 ((u32 *)session->sess_id.data)[1],
1910                 ((u32 *)session->sess_id.data)[2],
1911                 ((u32 *)session->sess_id.data)[3],
1912                 slot->seq_nr, slot->slot_nr,
1913                 tp->highest_used_slotid, args->sa_cache_this);
1914         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1915         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1916         *p++ = cpu_to_be32(slot->seq_nr);
1917         *p++ = cpu_to_be32(slot->slot_nr);
1918         *p++ = cpu_to_be32(tp->highest_used_slotid);
1919         *p = cpu_to_be32(args->sa_cache_this);
1920 #endif /* CONFIG_NFS_V4_1 */
1921 }
1922
1923 #ifdef CONFIG_NFS_V4_1
1924 static void
1925 encode_getdeviceinfo(struct xdr_stream *xdr,
1926                      const struct nfs4_getdeviceinfo_args *args,
1927                      struct compound_hdr *hdr)
1928 {
1929         __be32 *p;
1930
1931         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1932         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1933         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1934                                     NFS4_DEVICEID4_SIZE);
1935         *p++ = cpu_to_be32(args->pdev->layout_type);
1936         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1937
1938         p = reserve_space(xdr, 4 + 4);
1939         *p++ = cpu_to_be32(1);                  /* bitmap length */
1940         *p++ = cpu_to_be32(args->notify_types);
1941 }
1942
1943 static void
1944 encode_layoutget(struct xdr_stream *xdr,
1945                       const struct nfs4_layoutget_args *args,
1946                       struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949
1950         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1951         p = reserve_space(xdr, 36);
1952         *p++ = cpu_to_be32(0);     /* Signal layout available */
1953         *p++ = cpu_to_be32(args->type);
1954         *p++ = cpu_to_be32(args->range.iomode);
1955         p = xdr_encode_hyper(p, args->range.offset);
1956         p = xdr_encode_hyper(p, args->range.length);
1957         p = xdr_encode_hyper(p, args->minlength);
1958         encode_nfs4_stateid(xdr, &args->stateid);
1959         encode_uint32(xdr, args->maxcount);
1960
1961         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1962                 __func__,
1963                 args->type,
1964                 args->range.iomode,
1965                 (unsigned long)args->range.offset,
1966                 (unsigned long)args->range.length,
1967                 args->maxcount);
1968 }
1969
1970 static int
1971 encode_layoutcommit(struct xdr_stream *xdr,
1972                     struct inode *inode,
1973                     struct nfs4_layoutcommit_args *args,
1974                     struct compound_hdr *hdr)
1975 {
1976         __be32 *p;
1977
1978         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1979                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1980
1981         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1982         p = reserve_space(xdr, 20);
1983         /* Only whole file layouts */
1984         p = xdr_encode_hyper(p, 0); /* offset */
1985         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1986         *p = cpu_to_be32(0); /* reclaim */
1987         encode_nfs4_stateid(xdr, &args->stateid);
1988         if (args->lastbytewritten != U64_MAX) {
1989                 p = reserve_space(xdr, 20);
1990                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1991                 p = xdr_encode_hyper(p, args->lastbytewritten);
1992         } else {
1993                 p = reserve_space(xdr, 12);
1994                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
1995         }
1996         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1997         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1998
1999         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2000                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2001                         NFS_I(inode)->layout, xdr, args);
2002         } else {
2003                 encode_uint32(xdr, args->layoutupdate_len);
2004                 if (args->layoutupdate_pages) {
2005                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2006                                         args->layoutupdate_len);
2007                 }
2008         }
2009
2010         return 0;
2011 }
2012
2013 static void
2014 encode_layoutreturn(struct xdr_stream *xdr,
2015                     const struct nfs4_layoutreturn_args *args,
2016                     struct compound_hdr *hdr)
2017 {
2018         __be32 *p;
2019
2020         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2021         p = reserve_space(xdr, 16);
2022         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2023         *p++ = cpu_to_be32(args->layout_type);
2024         *p++ = cpu_to_be32(args->range.iomode);
2025         *p = cpu_to_be32(RETURN_FILE);
2026         p = reserve_space(xdr, 16);
2027         p = xdr_encode_hyper(p, args->range.offset);
2028         p = xdr_encode_hyper(p, args->range.length);
2029         spin_lock(&args->inode->i_lock);
2030         encode_nfs4_stateid(xdr, &args->stateid);
2031         spin_unlock(&args->inode->i_lock);
2032         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2033                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2034                         NFS_I(args->inode)->layout, xdr, args);
2035         } else
2036                 encode_uint32(xdr, 0);
2037 }
2038
2039 static int
2040 encode_secinfo_no_name(struct xdr_stream *xdr,
2041                        const struct nfs41_secinfo_no_name_args *args,
2042                        struct compound_hdr *hdr)
2043 {
2044         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2045         encode_uint32(xdr, args->style);
2046         return 0;
2047 }
2048
2049 static void encode_test_stateid(struct xdr_stream *xdr,
2050                                 struct nfs41_test_stateid_args *args,
2051                                 struct compound_hdr *hdr)
2052 {
2053         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2054         encode_uint32(xdr, 1);
2055         encode_nfs4_stateid(xdr, args->stateid);
2056 }
2057
2058 static void encode_free_stateid(struct xdr_stream *xdr,
2059                                 struct nfs41_free_stateid_args *args,
2060                                 struct compound_hdr *hdr)
2061 {
2062         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2063         encode_nfs4_stateid(xdr, &args->stateid);
2064 }
2065 #endif /* CONFIG_NFS_V4_1 */
2066
2067 /*
2068  * END OF "GENERIC" ENCODE ROUTINES.
2069  */
2070
2071 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2072 {
2073 #if defined(CONFIG_NFS_V4_1)
2074         struct nfs4_session *session = args->sa_slot->table->session;
2075         if (session)
2076                 return session->clp->cl_mvops->minor_version;
2077 #endif /* CONFIG_NFS_V4_1 */
2078         return 0;
2079 }
2080
2081 /*
2082  * Encode an ACCESS request
2083  */
2084 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2085                                 const struct nfs4_accessargs *args)
2086 {
2087         struct compound_hdr hdr = {
2088                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2089         };
2090
2091         encode_compound_hdr(xdr, req, &hdr);
2092         encode_sequence(xdr, &args->seq_args, &hdr);
2093         encode_putfh(xdr, args->fh, &hdr);
2094         encode_access(xdr, args->access, &hdr);
2095         encode_getfattr(xdr, args->bitmask, &hdr);
2096         encode_nops(&hdr);
2097 }
2098
2099 /*
2100  * Encode LOOKUP request
2101  */
2102 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_lookup_arg *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->dir_fh, &hdr);
2112         encode_lookup(xdr, args->name, &hdr);
2113         encode_getfh(xdr, &hdr);
2114         encode_getfattr(xdr, args->bitmask, &hdr);
2115         encode_nops(&hdr);
2116 }
2117
2118 /*
2119  * Encode LOOKUP_ROOT request
2120  */
2121 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2122                                      struct xdr_stream *xdr,
2123                                      const struct nfs4_lookup_root_arg *args)
2124 {
2125         struct compound_hdr hdr = {
2126                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127         };
2128
2129         encode_compound_hdr(xdr, req, &hdr);
2130         encode_sequence(xdr, &args->seq_args, &hdr);
2131         encode_putrootfh(xdr, &hdr);
2132         encode_getfh(xdr, &hdr);
2133         encode_getfattr(xdr, args->bitmask, &hdr);
2134         encode_nops(&hdr);
2135 }
2136
2137 /*
2138  * Encode REMOVE request
2139  */
2140 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2141                                 const struct nfs_removeargs *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putfh(xdr, args->fh, &hdr);
2150         encode_remove(xdr, &args->name, &hdr);
2151         encode_nops(&hdr);
2152 }
2153
2154 /*
2155  * Encode RENAME request
2156  */
2157 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2158                                 const struct nfs_renameargs *args)
2159 {
2160         struct compound_hdr hdr = {
2161                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2162         };
2163
2164         encode_compound_hdr(xdr, req, &hdr);
2165         encode_sequence(xdr, &args->seq_args, &hdr);
2166         encode_putfh(xdr, args->old_dir, &hdr);
2167         encode_savefh(xdr, &hdr);
2168         encode_putfh(xdr, args->new_dir, &hdr);
2169         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode LINK request
2175  */
2176 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                              const struct nfs4_link_arg *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->fh, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->dir_fh, &hdr);
2188         encode_link(xdr, args->name, &hdr);
2189         encode_restorefh(xdr, &hdr);
2190         encode_getfattr(xdr, args->bitmask, &hdr);
2191         encode_nops(&hdr);
2192 }
2193
2194 /*
2195  * Encode CREATE request
2196  */
2197 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                                 const struct nfs4_create_arg *args)
2199 {
2200         struct compound_hdr hdr = {
2201                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202         };
2203
2204         encode_compound_hdr(xdr, req, &hdr);
2205         encode_sequence(xdr, &args->seq_args, &hdr);
2206         encode_putfh(xdr, args->dir_fh, &hdr);
2207         encode_create(xdr, args, &hdr);
2208         encode_getfh(xdr, &hdr);
2209         encode_getfattr(xdr, args->bitmask, &hdr);
2210         encode_nops(&hdr);
2211 }
2212
2213 /*
2214  * Encode SYMLINK request
2215  */
2216 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2217                                  const struct nfs4_create_arg *args)
2218 {
2219         nfs4_xdr_enc_create(req, xdr, args);
2220 }
2221
2222 /*
2223  * Encode GETATTR request
2224  */
2225 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                  const struct nfs4_getattr_arg *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->fh, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode a CLOSE request
2241  */
2242 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                struct nfs_closeargs *args)
2244 {
2245         struct compound_hdr hdr = {
2246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247         };
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         encode_close(xdr, args, &hdr);
2253         encode_getfattr(xdr, args->bitmask, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode an OPEN request
2259  */
2260 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                               struct nfs_openargs *args)
2262 {
2263         struct compound_hdr hdr = {
2264                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265         };
2266
2267         encode_compound_hdr(xdr, req, &hdr);
2268         encode_sequence(xdr, &args->seq_args, &hdr);
2269         encode_putfh(xdr, args->fh, &hdr);
2270         encode_open(xdr, args, &hdr);
2271         encode_getfh(xdr, &hdr);
2272         if (args->access)
2273                 encode_access(xdr, args->access, &hdr);
2274         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode an OPEN_CONFIRM request
2280  */
2281 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2282                                       struct xdr_stream *xdr,
2283                                       struct nfs_open_confirmargs *args)
2284 {
2285         struct compound_hdr hdr = {
2286                 .nops   = 0,
2287         };
2288
2289         encode_compound_hdr(xdr, req, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_open_confirm(xdr, args, &hdr);
2292         encode_nops(&hdr);
2293 }
2294
2295 /*
2296  * Encode an OPEN request with no attributes.
2297  */
2298 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2299                                      struct xdr_stream *xdr,
2300                                      struct nfs_openargs *args)
2301 {
2302         struct compound_hdr hdr = {
2303                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2304         };
2305
2306         encode_compound_hdr(xdr, req, &hdr);
2307         encode_sequence(xdr, &args->seq_args, &hdr);
2308         encode_putfh(xdr, args->fh, &hdr);
2309         encode_open(xdr, args, &hdr);
2310         if (args->access)
2311                 encode_access(xdr, args->access, &hdr);
2312         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode an OPEN_DOWNGRADE request
2318  */
2319 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2320                                         struct xdr_stream *xdr,
2321                                         struct nfs_closeargs *args)
2322 {
2323         struct compound_hdr hdr = {
2324                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325         };
2326
2327         encode_compound_hdr(xdr, req, &hdr);
2328         encode_sequence(xdr, &args->seq_args, &hdr);
2329         encode_putfh(xdr, args->fh, &hdr);
2330         encode_open_downgrade(xdr, args, &hdr);
2331         encode_getfattr(xdr, args->bitmask, &hdr);
2332         encode_nops(&hdr);
2333 }
2334
2335 /*
2336  * Encode a LOCK request
2337  */
2338 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2339                               struct nfs_lock_args *args)
2340 {
2341         struct compound_hdr hdr = {
2342                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343         };
2344
2345         encode_compound_hdr(xdr, req, &hdr);
2346         encode_sequence(xdr, &args->seq_args, &hdr);
2347         encode_putfh(xdr, args->fh, &hdr);
2348         encode_lock(xdr, args, &hdr);
2349         encode_nops(&hdr);
2350 }
2351
2352 /*
2353  * Encode a LOCKT request
2354  */
2355 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2356                                struct nfs_lockt_args *args)
2357 {
2358         struct compound_hdr hdr = {
2359                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2360         };
2361
2362         encode_compound_hdr(xdr, req, &hdr);
2363         encode_sequence(xdr, &args->seq_args, &hdr);
2364         encode_putfh(xdr, args->fh, &hdr);
2365         encode_lockt(xdr, args, &hdr);
2366         encode_nops(&hdr);
2367 }
2368
2369 /*
2370  * Encode a LOCKU request
2371  */
2372 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2373                                struct nfs_locku_args *args)
2374 {
2375         struct compound_hdr hdr = {
2376                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2377         };
2378
2379         encode_compound_hdr(xdr, req, &hdr);
2380         encode_sequence(xdr, &args->seq_args, &hdr);
2381         encode_putfh(xdr, args->fh, &hdr);
2382         encode_locku(xdr, args, &hdr);
2383         encode_nops(&hdr);
2384 }
2385
2386 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2387                                            struct xdr_stream *xdr,
2388                                         struct nfs_release_lockowner_args *args)
2389 {
2390         struct compound_hdr hdr = {
2391                 .minorversion = 0,
2392         };
2393
2394         encode_compound_hdr(xdr, req, &hdr);
2395         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2396         encode_nops(&hdr);
2397 }
2398
2399 /*
2400  * Encode a READLINK request
2401  */
2402 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2403                                   const struct nfs4_readlink *args)
2404 {
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408
2409         encode_compound_hdr(xdr, req, &hdr);
2410         encode_sequence(xdr, &args->seq_args, &hdr);
2411         encode_putfh(xdr, args->fh, &hdr);
2412         encode_readlink(xdr, args, req, &hdr);
2413
2414         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2415                         args->pgbase, args->pglen);
2416         encode_nops(&hdr);
2417 }
2418
2419 /*
2420  * Encode a READDIR request
2421  */
2422 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2423                                  const struct nfs4_readdir_arg *args)
2424 {
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427         };
2428
2429         encode_compound_hdr(xdr, req, &hdr);
2430         encode_sequence(xdr, &args->seq_args, &hdr);
2431         encode_putfh(xdr, args->fh, &hdr);
2432         encode_readdir(xdr, args, req, &hdr);
2433
2434         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2435                          args->pgbase, args->count);
2436         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2437                         __func__, hdr.replen << 2, args->pages,
2438                         args->pgbase, args->count);
2439         encode_nops(&hdr);
2440 }
2441
2442 /*
2443  * Encode a READ request
2444  */
2445 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2446                               struct nfs_pgio_args *args)
2447 {
2448         struct compound_hdr hdr = {
2449                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2450         };
2451
2452         encode_compound_hdr(xdr, req, &hdr);
2453         encode_sequence(xdr, &args->seq_args, &hdr);
2454         encode_putfh(xdr, args->fh, &hdr);
2455         encode_read(xdr, args, &hdr);
2456
2457         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2458                          args->pages, args->pgbase, args->count);
2459         req->rq_rcv_buf.flags |= XDRBUF_READ;
2460         encode_nops(&hdr);
2461 }
2462
2463 /*
2464  * Encode an SETATTR request
2465  */
2466 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2467                                  struct nfs_setattrargs *args)
2468 {
2469         struct compound_hdr hdr = {
2470                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2471         };
2472
2473         encode_compound_hdr(xdr, req, &hdr);
2474         encode_sequence(xdr, &args->seq_args, &hdr);
2475         encode_putfh(xdr, args->fh, &hdr);
2476         encode_setattr(xdr, args, args->server, &hdr);
2477         encode_getfattr(xdr, args->bitmask, &hdr);
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * Encode a GETACL request
2483  */
2484 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2485                                 struct nfs_getaclargs *args)
2486 {
2487         struct compound_hdr hdr = {
2488                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2489         };
2490         uint32_t replen;
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_sequence(xdr, &args->seq_args, &hdr);
2494         encode_putfh(xdr, args->fh, &hdr);
2495         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2496         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2497
2498         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2499                 args->acl_pages, 0, args->acl_len);
2500
2501         encode_nops(&hdr);
2502 }
2503
2504 /*
2505  * Encode a WRITE request
2506  */
2507 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2508                                struct nfs_pgio_args *args)
2509 {
2510         struct compound_hdr hdr = {
2511                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2512         };
2513
2514         encode_compound_hdr(xdr, req, &hdr);
2515         encode_sequence(xdr, &args->seq_args, &hdr);
2516         encode_putfh(xdr, args->fh, &hdr);
2517         encode_write(xdr, args, &hdr);
2518         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2519         if (args->bitmask)
2520                 encode_getfattr(xdr, args->bitmask, &hdr);
2521         encode_nops(&hdr);
2522 }
2523
2524 /*
2525  *  a COMMIT request
2526  */
2527 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2528                                 struct nfs_commitargs *args)
2529 {
2530         struct compound_hdr hdr = {
2531                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2532         };
2533
2534         encode_compound_hdr(xdr, req, &hdr);
2535         encode_sequence(xdr, &args->seq_args, &hdr);
2536         encode_putfh(xdr, args->fh, &hdr);
2537         encode_commit(xdr, args, &hdr);
2538         encode_nops(&hdr);
2539 }
2540
2541 /*
2542  * FSINFO request
2543  */
2544 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2545                                 struct nfs4_fsinfo_arg *args)
2546 {
2547         struct compound_hdr hdr = {
2548                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2549         };
2550
2551         encode_compound_hdr(xdr, req, &hdr);
2552         encode_sequence(xdr, &args->seq_args, &hdr);
2553         encode_putfh(xdr, args->fh, &hdr);
2554         encode_fsinfo(xdr, args->bitmask, &hdr);
2555         encode_nops(&hdr);
2556 }
2557
2558 /*
2559  * a PATHCONF request
2560  */
2561 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2562                                   const struct nfs4_pathconf_arg *args)
2563 {
2564         struct compound_hdr hdr = {
2565                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2566         };
2567
2568         encode_compound_hdr(xdr, req, &hdr);
2569         encode_sequence(xdr, &args->seq_args, &hdr);
2570         encode_putfh(xdr, args->fh, &hdr);
2571         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2572                            &hdr);
2573         encode_nops(&hdr);
2574 }
2575
2576 /*
2577  * a STATFS request
2578  */
2579 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                                 const struct nfs4_statfs_arg *args)
2581 {
2582         struct compound_hdr hdr = {
2583                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2584         };
2585
2586         encode_compound_hdr(xdr, req, &hdr);
2587         encode_sequence(xdr, &args->seq_args, &hdr);
2588         encode_putfh(xdr, args->fh, &hdr);
2589         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2590                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * GETATTR_BITMAP request
2596  */
2597 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2598                                      struct xdr_stream *xdr,
2599                                      struct nfs4_server_caps_arg *args)
2600 {
2601         const u32 *bitmask = args->bitmask;
2602         struct compound_hdr hdr = {
2603                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604         };
2605
2606         encode_compound_hdr(xdr, req, &hdr);
2607         encode_sequence(xdr, &args->seq_args, &hdr);
2608         encode_putfh(xdr, args->fhandle, &hdr);
2609         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2610         encode_nops(&hdr);
2611 }
2612
2613 /*
2614  * a RENEW request
2615  */
2616 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2617                                struct nfs_client *clp)
2618 {
2619         struct compound_hdr hdr = {
2620                 .nops   = 0,
2621         };
2622
2623         encode_compound_hdr(xdr, req, &hdr);
2624         encode_renew(xdr, clp->cl_clientid, &hdr);
2625         encode_nops(&hdr);
2626 }
2627
2628 /*
2629  * a SETCLIENTID request
2630  */
2631 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2632                                      struct xdr_stream *xdr,
2633                                      struct nfs4_setclientid *sc)
2634 {
2635         struct compound_hdr hdr = {
2636                 .nops   = 0,
2637         };
2638
2639         encode_compound_hdr(xdr, req, &hdr);
2640         encode_setclientid(xdr, sc, &hdr);
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  * a SETCLIENTID_CONFIRM request
2646  */
2647 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2648                                              struct xdr_stream *xdr,
2649                                              struct nfs4_setclientid_res *arg)
2650 {
2651         struct compound_hdr hdr = {
2652                 .nops   = 0,
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_setclientid_confirm(xdr, arg, &hdr);
2657         encode_nops(&hdr);
2658 }
2659
2660 /*
2661  * DELEGRETURN request
2662  */
2663 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      const struct nfs4_delegreturnargs *args)
2666 {
2667         struct compound_hdr hdr = {
2668                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669         };
2670
2671         encode_compound_hdr(xdr, req, &hdr);
2672         encode_sequence(xdr, &args->seq_args, &hdr);
2673         encode_putfh(xdr, args->fhandle, &hdr);
2674         encode_getfattr(xdr, args->bitmask, &hdr);
2675         encode_delegreturn(xdr, args->stateid, &hdr);
2676         encode_nops(&hdr);
2677 }
2678
2679 /*
2680  * Encode FS_LOCATIONS request
2681  */
2682 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2683                                       struct xdr_stream *xdr,
2684                                       struct nfs4_fs_locations_arg *args)
2685 {
2686         struct compound_hdr hdr = {
2687                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2688         };
2689         uint32_t replen;
2690
2691         encode_compound_hdr(xdr, req, &hdr);
2692         encode_sequence(xdr, &args->seq_args, &hdr);
2693         if (args->migration) {
2694                 encode_putfh(xdr, args->fh, &hdr);
2695                 replen = hdr.replen;
2696                 encode_fs_locations(xdr, args->bitmask, &hdr);
2697                 if (args->renew)
2698                         encode_renew(xdr, args->clientid, &hdr);
2699         } else {
2700                 encode_putfh(xdr, args->dir_fh, &hdr);
2701                 encode_lookup(xdr, args->name, &hdr);
2702                 replen = hdr.replen;
2703                 encode_fs_locations(xdr, args->bitmask, &hdr);
2704         }
2705
2706         /* Set up reply kvec to capture returned fs_locations array. */
2707         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2708                         0, PAGE_SIZE);
2709         encode_nops(&hdr);
2710 }
2711
2712 /*
2713  * Encode SECINFO request
2714  */
2715 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2716                                 struct xdr_stream *xdr,
2717                                 struct nfs4_secinfo_arg *args)
2718 {
2719         struct compound_hdr hdr = {
2720                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721         };
2722
2723         encode_compound_hdr(xdr, req, &hdr);
2724         encode_sequence(xdr, &args->seq_args, &hdr);
2725         encode_putfh(xdr, args->dir_fh, &hdr);
2726         encode_secinfo(xdr, args->name, &hdr);
2727         encode_nops(&hdr);
2728 }
2729
2730 /*
2731  * Encode FSID_PRESENT request
2732  */
2733 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2734                                       struct xdr_stream *xdr,
2735                                       struct nfs4_fsid_present_arg *args)
2736 {
2737         struct compound_hdr hdr = {
2738                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2739         };
2740
2741         encode_compound_hdr(xdr, req, &hdr);
2742         encode_sequence(xdr, &args->seq_args, &hdr);
2743         encode_putfh(xdr, args->fh, &hdr);
2744         encode_getfh(xdr, &hdr);
2745         if (args->renew)
2746                 encode_renew(xdr, args->clientid, &hdr);
2747         encode_nops(&hdr);
2748 }
2749
2750 #if defined(CONFIG_NFS_V4_1)
2751 /*
2752  * BIND_CONN_TO_SESSION request
2753  */
2754 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2755                                 struct xdr_stream *xdr,
2756                                 struct nfs41_bind_conn_to_session_args *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = args->client->cl_mvops->minor_version,
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_bind_conn_to_session(xdr, args, &hdr);
2764         encode_nops(&hdr);
2765 }
2766
2767 /*
2768  * EXCHANGE_ID request
2769  */
2770 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2771                                      struct xdr_stream *xdr,
2772                                      struct nfs41_exchange_id_args *args)
2773 {
2774         struct compound_hdr hdr = {
2775                 .minorversion = args->client->cl_mvops->minor_version,
2776         };
2777
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_exchange_id(xdr, args, &hdr);
2780         encode_nops(&hdr);
2781 }
2782
2783 /*
2784  * a CREATE_SESSION request
2785  */
2786 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2787                                         struct xdr_stream *xdr,
2788                                         struct nfs41_create_session_args *args)
2789 {
2790         struct compound_hdr hdr = {
2791                 .minorversion = args->client->cl_mvops->minor_version,
2792         };
2793
2794         encode_compound_hdr(xdr, req, &hdr);
2795         encode_create_session(xdr, args, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * a DESTROY_SESSION request
2801  */
2802 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2803                                          struct xdr_stream *xdr,
2804                                          struct nfs4_session *session)
2805 {
2806         struct compound_hdr hdr = {
2807                 .minorversion = session->clp->cl_mvops->minor_version,
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_destroy_session(xdr, session, &hdr);
2812         encode_nops(&hdr);
2813 }
2814
2815 /*
2816  * a DESTROY_CLIENTID request
2817  */
2818 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2819                                          struct xdr_stream *xdr,
2820                                          struct nfs_client *clp)
2821 {
2822         struct compound_hdr hdr = {
2823                 .minorversion = clp->cl_mvops->minor_version,
2824         };
2825
2826         encode_compound_hdr(xdr, req, &hdr);
2827         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2828         encode_nops(&hdr);
2829 }
2830
2831 /*
2832  * a SEQUENCE request
2833  */
2834 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2835                                   struct nfs4_sequence_args *args)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(args),
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, args, &hdr);
2843         encode_nops(&hdr);
2844 }
2845
2846 /*
2847  * a GET_LEASE_TIME request
2848  */
2849 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2850                                         struct xdr_stream *xdr,
2851                                         struct nfs4_get_lease_time_args *args)
2852 {
2853         struct compound_hdr hdr = {
2854                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2855         };
2856         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2857
2858         encode_compound_hdr(xdr, req, &hdr);
2859         encode_sequence(xdr, &args->la_seq_args, &hdr);
2860         encode_putrootfh(xdr, &hdr);
2861         encode_fsinfo(xdr, lease_bitmap, &hdr);
2862         encode_nops(&hdr);
2863 }
2864
2865 /*
2866  * a RECLAIM_COMPLETE request
2867  */
2868 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2869                                           struct xdr_stream *xdr,
2870                                 struct nfs41_reclaim_complete_args *args)
2871 {
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_reclaim_complete(xdr, args, &hdr);
2879         encode_nops(&hdr);
2880 }
2881
2882 /*
2883  * Encode GETDEVICEINFO request
2884  */
2885 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2886                                        struct xdr_stream *xdr,
2887                                        struct nfs4_getdeviceinfo_args *args)
2888 {
2889         struct compound_hdr hdr = {
2890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->seq_args, &hdr);
2895         encode_getdeviceinfo(xdr, args, &hdr);
2896
2897         /* set up reply kvec. Subtract notification bitmap max size (2)
2898          * so that notification bitmap is put in xdr_buf tail */
2899         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2900                          args->pdev->pages, args->pdev->pgbase,
2901                          args->pdev->pglen);
2902
2903         encode_nops(&hdr);
2904 }
2905
2906 /*
2907  *  Encode LAYOUTGET request
2908  */
2909 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2910                                    struct xdr_stream *xdr,
2911                                    struct nfs4_layoutget_args *args)
2912 {
2913         struct compound_hdr hdr = {
2914                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915         };
2916
2917         encode_compound_hdr(xdr, req, &hdr);
2918         encode_sequence(xdr, &args->seq_args, &hdr);
2919         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2920         encode_layoutget(xdr, args, &hdr);
2921
2922         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2923             args->layout.pages, 0, args->layout.pglen);
2924
2925         encode_nops(&hdr);
2926 }
2927
2928 /*
2929  *  Encode LAYOUTCOMMIT request
2930  */
2931 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2932                                       struct xdr_stream *xdr,
2933                                       struct nfs4_layoutcommit_args *args)
2934 {
2935         struct nfs4_layoutcommit_data *data =
2936                 container_of(args, struct nfs4_layoutcommit_data, args);
2937         struct compound_hdr hdr = {
2938                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_sequence(xdr, &args->seq_args, &hdr);
2943         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2945         encode_getfattr(xdr, args->bitmask, &hdr);
2946         encode_nops(&hdr);
2947 }
2948
2949 /*
2950  * Encode LAYOUTRETURN request
2951  */
2952 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2953                                       struct xdr_stream *xdr,
2954                                       struct nfs4_layoutreturn_args *args)
2955 {
2956         struct compound_hdr hdr = {
2957                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2958         };
2959
2960         encode_compound_hdr(xdr, req, &hdr);
2961         encode_sequence(xdr, &args->seq_args, &hdr);
2962         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2963         encode_layoutreturn(xdr, args, &hdr);
2964         encode_nops(&hdr);
2965 }
2966
2967 /*
2968  * Encode SECINFO_NO_NAME request
2969  */
2970 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2971                                         struct xdr_stream *xdr,
2972                                         struct nfs41_secinfo_no_name_args *args)
2973 {
2974         struct compound_hdr hdr = {
2975                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976         };
2977
2978         encode_compound_hdr(xdr, req, &hdr);
2979         encode_sequence(xdr, &args->seq_args, &hdr);
2980         encode_putrootfh(xdr, &hdr);
2981         encode_secinfo_no_name(xdr, args, &hdr);
2982         encode_nops(&hdr);
2983         return 0;
2984 }
2985
2986 /*
2987  *  Encode TEST_STATEID request
2988  */
2989 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2990                                       struct xdr_stream *xdr,
2991                                       struct nfs41_test_stateid_args *args)
2992 {
2993         struct compound_hdr hdr = {
2994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2995         };
2996
2997         encode_compound_hdr(xdr, req, &hdr);
2998         encode_sequence(xdr, &args->seq_args, &hdr);
2999         encode_test_stateid(xdr, args, &hdr);
3000         encode_nops(&hdr);
3001 }
3002
3003 /*
3004  *  Encode FREE_STATEID request
3005  */
3006 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3007                                      struct xdr_stream *xdr,
3008                                      struct nfs41_free_stateid_args *args)
3009 {
3010         struct compound_hdr hdr = {
3011                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012         };
3013
3014         encode_compound_hdr(xdr, req, &hdr);
3015         encode_sequence(xdr, &args->seq_args, &hdr);
3016         encode_free_stateid(xdr, args, &hdr);
3017         encode_nops(&hdr);
3018 }
3019 #endif /* CONFIG_NFS_V4_1 */
3020
3021 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3022 {
3023         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3024                 "Remaining buffer length is %tu words.\n",
3025                 func, xdr->end - xdr->p);
3026 }
3027
3028 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3029 {
3030         __be32 *p;
3031
3032         p = xdr_inline_decode(xdr, 4);
3033         if (unlikely(!p))
3034                 goto out_overflow;
3035         *len = be32_to_cpup(p);
3036         p = xdr_inline_decode(xdr, *len);
3037         if (unlikely(!p))
3038                 goto out_overflow;
3039         *string = (char *)p;
3040         return 0;
3041 out_overflow:
3042         print_overflow_msg(__func__, xdr);
3043         return -EIO;
3044 }
3045
3046 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3047 {
3048         __be32 *p;
3049
3050         p = xdr_inline_decode(xdr, 8);
3051         if (unlikely(!p))
3052                 goto out_overflow;
3053         hdr->status = be32_to_cpup(p++);
3054         hdr->taglen = be32_to_cpup(p);
3055
3056         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3057         if (unlikely(!p))
3058                 goto out_overflow;
3059         hdr->tag = (char *)p;
3060         p += XDR_QUADLEN(hdr->taglen);
3061         hdr->nops = be32_to_cpup(p);
3062         if (unlikely(hdr->nops < 1))
3063                 return nfs4_stat_to_errno(hdr->status);
3064         return 0;
3065 out_overflow:
3066         print_overflow_msg(__func__, xdr);
3067         return -EIO;
3068 }
3069
3070 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3071                 int *nfs_retval)
3072 {
3073         __be32 *p;
3074         uint32_t opnum;
3075         int32_t nfserr;
3076
3077         p = xdr_inline_decode(xdr, 8);
3078         if (unlikely(!p))
3079                 goto out_overflow;
3080         opnum = be32_to_cpup(p++);
3081         if (unlikely(opnum != expected))
3082                 goto out_bad_operation;
3083         nfserr = be32_to_cpup(p);
3084         if (nfserr == NFS_OK)
3085                 *nfs_retval = 0;
3086         else
3087                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3088         return true;
3089 out_bad_operation:
3090         dprintk("nfs: Server returned operation"
3091                 " %d but we issued a request for %d\n",
3092                         opnum, expected);
3093         *nfs_retval = -EREMOTEIO;
3094         return false;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         *nfs_retval = -EIO;
3098         return false;
3099 }
3100
3101 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3102 {
3103         int retval;
3104
3105         __decode_op_hdr(xdr, expected, &retval);
3106         return retval;
3107 }
3108
3109 /* Dummy routine */
3110 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3111 {
3112         __be32 *p;
3113         unsigned int strlen;
3114         char *str;
3115
3116         p = xdr_inline_decode(xdr, 12);
3117         if (likely(p))
3118                 return decode_opaque_inline(xdr, &strlen, &str);
3119         print_overflow_msg(__func__, xdr);
3120         return -EIO;
3121 }
3122
3123 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3124 {
3125         uint32_t bmlen;
3126         __be32 *p;
3127
3128         p = xdr_inline_decode(xdr, 4);
3129         if (unlikely(!p))
3130                 goto out_overflow;
3131         bmlen = be32_to_cpup(p);
3132
3133         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3134         p = xdr_inline_decode(xdr, (bmlen << 2));
3135         if (unlikely(!p))
3136                 goto out_overflow;
3137         if (bmlen > 0) {
3138                 bitmap[0] = be32_to_cpup(p++);
3139                 if (bmlen > 1) {
3140                         bitmap[1] = be32_to_cpup(p++);
3141                         if (bmlen > 2)
3142                                 bitmap[2] = be32_to_cpup(p);
3143                 }
3144         }
3145         return 0;
3146 out_overflow:
3147         print_overflow_msg(__func__, xdr);
3148         return -EIO;
3149 }
3150
3151 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3152 {
3153         __be32 *p;
3154
3155         p = xdr_inline_decode(xdr, 4);
3156         if (unlikely(!p))
3157                 goto out_overflow;
3158         *attrlen = be32_to_cpup(p);
3159         *savep = xdr_stream_pos(xdr);
3160         return 0;
3161 out_overflow:
3162         print_overflow_msg(__func__, xdr);
3163         return -EIO;
3164 }
3165
3166 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3167 {
3168         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3169                 int ret;
3170                 ret = decode_attr_bitmap(xdr, bitmask);
3171                 if (unlikely(ret < 0))
3172                         return ret;
3173                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3174         } else
3175                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3176         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3177                 bitmask[0], bitmask[1], bitmask[2]);
3178         return 0;
3179 }
3180
3181 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3182 {
3183         __be32 *p;
3184         int ret = 0;
3185
3186         *type = 0;
3187         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3188                 return -EIO;
3189         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3190                 p = xdr_inline_decode(xdr, 4);
3191                 if (unlikely(!p))
3192                         goto out_overflow;
3193                 *type = be32_to_cpup(p);
3194                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3195                         dprintk("%s: bad type %d\n", __func__, *type);
3196                         return -EIO;
3197                 }
3198                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3199                 ret = NFS_ATTR_FATTR_TYPE;
3200         }
3201         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3202         return ret;
3203 out_overflow:
3204         print_overflow_msg(__func__, xdr);
3205         return -EIO;
3206 }
3207
3208 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3209                                       uint32_t *bitmap, uint32_t *type)
3210 {
3211         __be32 *p;
3212
3213         *type = 0;
3214         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3215                 return -EIO;
3216         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3217                 p = xdr_inline_decode(xdr, 4);
3218                 if (unlikely(!p))
3219                         goto out_overflow;
3220                 *type = be32_to_cpup(p);
3221                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3222         }
3223         dprintk("%s: expire type=0x%x\n", __func__, *type);
3224         return 0;
3225 out_overflow:
3226         print_overflow_msg(__func__, xdr);
3227         return -EIO;
3228 }
3229
3230 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3231 {
3232         __be32 *p;
3233         int ret = 0;
3234
3235         *change = 0;
3236         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3237                 return -EIO;
3238         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3239                 p = xdr_inline_decode(xdr, 8);
3240                 if (unlikely(!p))
3241                         goto out_overflow;
3242                 xdr_decode_hyper(p, change);
3243                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3244                 ret = NFS_ATTR_FATTR_CHANGE;
3245         }
3246         dprintk("%s: change attribute=%Lu\n", __func__,
3247                         (unsigned long long)*change);
3248         return ret;
3249 out_overflow:
3250         print_overflow_msg(__func__, xdr);
3251         return -EIO;
3252 }
3253
3254 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3255 {
3256         __be32 *p;
3257         int ret = 0;
3258
3259         *size = 0;
3260         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3261                 return -EIO;
3262         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3263                 p = xdr_inline_decode(xdr, 8);
3264                 if (unlikely(!p))
3265                         goto out_overflow;
3266                 xdr_decode_hyper(p, size);
3267                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3268                 ret = NFS_ATTR_FATTR_SIZE;
3269         }
3270         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3271         return ret;
3272 out_overflow:
3273         print_overflow_msg(__func__, xdr);
3274         return -EIO;
3275 }
3276
3277 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3278 {
3279         __be32 *p;
3280
3281         *res = 0;
3282         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3283                 return -EIO;
3284         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3285                 p = xdr_inline_decode(xdr, 4);
3286                 if (unlikely(!p))
3287                         goto out_overflow;
3288                 *res = be32_to_cpup(p);
3289                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3290         }
3291         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3292         return 0;
3293 out_overflow:
3294         print_overflow_msg(__func__, xdr);
3295         return -EIO;
3296 }
3297
3298 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3299 {
3300         __be32 *p;
3301
3302         *res = 0;
3303         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3304                 return -EIO;
3305         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3306                 p = xdr_inline_decode(xdr, 4);
3307                 if (unlikely(!p))
3308                         goto out_overflow;
3309                 *res = be32_to_cpup(p);
3310                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3311         }
3312         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3313         return 0;
3314 out_overflow:
3315         print_overflow_msg(__func__, xdr);
3316         return -EIO;
3317 }
3318
3319 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3320 {
3321         __be32 *p;
3322         int ret = 0;
3323
3324         fsid->major = 0;
3325         fsid->minor = 0;
3326         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3327                 return -EIO;
3328         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3329                 p = xdr_inline_decode(xdr, 16);
3330                 if (unlikely(!p))
3331                         goto out_overflow;
3332                 p = xdr_decode_hyper(p, &fsid->major);
3333                 xdr_decode_hyper(p, &fsid->minor);
3334                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3335                 ret = NFS_ATTR_FATTR_FSID;
3336         }
3337         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3338                         (unsigned long long)fsid->major,
3339                         (unsigned long long)fsid->minor);
3340         return ret;
3341 out_overflow:
3342         print_overflow_msg(__func__, xdr);
3343         return -EIO;
3344 }
3345
3346 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3347 {
3348         __be32 *p;
3349
3350         *res = 60;
3351         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3352                 return -EIO;
3353         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3354                 p = xdr_inline_decode(xdr, 4);
3355                 if (unlikely(!p))
3356                         goto out_overflow;
3357                 *res = be32_to_cpup(p);
3358                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3359         }
3360         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3361         return 0;
3362 out_overflow:
3363         print_overflow_msg(__func__, xdr);
3364         return -EIO;
3365 }
3366
3367 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3368 {
3369         __be32 *p;
3370
3371         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3374                 p = xdr_inline_decode(xdr, 4);
3375                 if (unlikely(!p))
3376                         goto out_overflow;
3377                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3378                 *res = -be32_to_cpup(p);
3379         }
3380         return 0;
3381 out_overflow:
3382         print_overflow_msg(__func__, xdr);
3383         return -EIO;
3384 }
3385
3386 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3387                                  uint32_t *bitmap, uint32_t *bitmask)
3388 {
3389         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3390                 int ret;
3391                 ret = decode_attr_bitmap(xdr, bitmask);
3392                 if (unlikely(ret < 0))
3393                         return ret;
3394                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3395         } else
3396                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3397         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3398                 bitmask[0], bitmask[1], bitmask[2]);
3399         return 0;
3400 }
3401
3402 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3403 {
3404         __be32 *p;
3405         int len;
3406
3407         if (fh != NULL)
3408                 memset(fh, 0, sizeof(*fh));
3409
3410         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3411                 return -EIO;
3412         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3413                 p = xdr_inline_decode(xdr, 4);
3414                 if (unlikely(!p))
3415                         goto out_overflow;
3416                 len = be32_to_cpup(p);
3417                 if (len > NFS4_FHSIZE)
3418                         return -EIO;
3419                 p = xdr_inline_decode(xdr, len);
3420                 if (unlikely(!p))
3421                         goto out_overflow;
3422                 if (fh != NULL) {
3423                         memcpy(fh->data, p, len);
3424                         fh->size = len;
3425                 }
3426                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3427         }
3428         return 0;
3429 out_overflow:
3430         print_overflow_msg(__func__, xdr);
3431         return -EIO;
3432 }
3433
3434 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3435 {
3436         __be32 *p;
3437
3438         *res = 0;
3439         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3440                 return -EIO;
3441         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3442                 p = xdr_inline_decode(xdr, 4);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 *res = be32_to_cpup(p);
3446                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3447         }
3448         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3449         return 0;
3450 out_overflow:
3451         print_overflow_msg(__func__, xdr);
3452         return -EIO;
3453 }
3454
3455 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3456 {
3457         __be32 *p;
3458         int ret = 0;
3459
3460         *fileid = 0;
3461         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3462                 return -EIO;
3463         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3464                 p = xdr_inline_decode(xdr, 8);
3465                 if (unlikely(!p))
3466                         goto out_overflow;
3467                 xdr_decode_hyper(p, fileid);
3468                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3469                 ret = NFS_ATTR_FATTR_FILEID;
3470         }
3471         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3472         return ret;
3473 out_overflow:
3474         print_overflow_msg(__func__, xdr);
3475         return -EIO;
3476 }
3477
3478 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480         __be32 *p;
3481         int ret = 0;
3482
3483         *fileid = 0;
3484         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3485                 return -EIO;
3486         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3487                 p = xdr_inline_decode(xdr, 8);
3488                 if (unlikely(!p))
3489                         goto out_overflow;
3490                 xdr_decode_hyper(p, fileid);
3491                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3492                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3493         }
3494         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495         return ret;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503         __be32 *p;
3504         int status = 0;
3505
3506         *res = 0;
3507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3510                 p = xdr_inline_decode(xdr, 8);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 xdr_decode_hyper(p, res);
3514                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3515         }
3516         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3517         return status;
3518 out_overflow:
3519         print_overflow_msg(__func__, xdr);
3520         return -EIO;
3521 }
3522
3523 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525         __be32 *p;
3526         int status = 0;
3527
3528         *res = 0;
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3532                 p = xdr_inline_decode(xdr, 8);
3533                 if (unlikely(!p))
3534                         goto out_overflow;
3535                 xdr_decode_hyper(p, res);
3536                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3537         }
3538         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3539         return status;
3540 out_overflow:
3541         print_overflow_msg(__func__, xdr);
3542         return -EIO;
3543 }
3544
3545 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547         __be32 *p;
3548         int status = 0;
3549
3550         *res = 0;
3551         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3552                 return -EIO;
3553         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3554                 p = xdr_inline_decode(xdr, 8);
3555                 if (unlikely(!p))
3556                         goto out_overflow;
3557                 xdr_decode_hyper(p, res);
3558                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3559         }
3560         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3561         return status;
3562 out_overflow:
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3568 {
3569         u32 n;
3570         __be32 *p;
3571         int status = 0;
3572
3573         p = xdr_inline_decode(xdr, 4);
3574         if (unlikely(!p))
3575                 goto out_overflow;
3576         n = be32_to_cpup(p);
3577         if (n == 0)
3578                 goto root_path;
3579         dprintk("pathname4: ");
3580         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3581                 dprintk("cannot parse %d components in path\n", n);
3582                 goto out_eio;
3583         }
3584         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3585                 struct nfs4_string *component = &path->components[path->ncomponents];
3586                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3587                 if (unlikely(status != 0))
3588                         goto out_eio;
3589                 ifdebug (XDR)
3590                         pr_cont("%s%.*s ",
3591                                 (path->ncomponents != n ? "/ " : ""),
3592                                 component->len, component->data);
3593         }
3594 out:
3595         return status;
3596 root_path:
3597 /* a root pathname is sent as a zero component4 */
3598         path->ncomponents = 1;
3599         path->components[0].len=0;
3600         path->components[0].data=NULL;
3601         dprintk("pathname4: /\n");
3602         goto out;
3603 out_eio:
3604         dprintk(" status %d", status);
3605         status = -EIO;
3606         goto out;
3607 out_overflow:
3608         print_overflow_msg(__func__, xdr);
3609         return -EIO;
3610 }
3611
3612 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3613 {
3614         int n;
3615         __be32 *p;
3616         int status = -EIO;
3617
3618         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3619                 goto out;
3620         status = 0;
3621         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3622                 goto out;
3623         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3624         status = -EIO;
3625         /* Ignore borken servers that return unrequested attrs */
3626         if (unlikely(res == NULL))
3627                 goto out;
3628         dprintk("%s: fsroot:\n", __func__);
3629         status = decode_pathname(xdr, &res->fs_path);
3630         if (unlikely(status != 0))
3631                 goto out;
3632         p = xdr_inline_decode(xdr, 4);
3633         if (unlikely(!p))
3634                 goto out_overflow;
3635         n = be32_to_cpup(p);
3636         if (n <= 0)
3637                 goto out_eio;
3638         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3639                 u32 m;
3640                 struct nfs4_fs_location *loc;
3641
3642                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3643                         break;
3644                 loc = &res->locations[res->nlocations];
3645                 p = xdr_inline_decode(xdr, 4);
3646                 if (unlikely(!p))
3647                         goto out_overflow;
3648                 m = be32_to_cpup(p);
3649
3650                 dprintk("%s: servers:\n", __func__);
3651                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3652                         struct nfs4_string *server;
3653
3654                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3655                                 unsigned int i;
3656                                 dprintk("%s: using first %u of %u servers "
3657                                         "returned for location %u\n",
3658                                                 __func__,
3659                                                 NFS4_FS_LOCATION_MAXSERVERS,
3660                                                 m, res->nlocations);
3661                                 for (i = loc->nservers; i < m; i++) {
3662                                         unsigned int len;
3663                                         char *data;
3664                                         status = decode_opaque_inline(xdr, &len, &data);
3665                                         if (unlikely(status != 0))
3666                                                 goto out_eio;
3667                                 }
3668                                 break;
3669                         }
3670                         server = &loc->servers[loc->nservers];
3671                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3672                         if (unlikely(status != 0))
3673                                 goto out_eio;
3674                         dprintk("%s ", server->data);
3675                 }
3676                 status = decode_pathname(xdr, &loc->rootpath);
3677                 if (unlikely(status != 0))
3678                         goto out_eio;
3679         }
3680         if (res->nlocations != 0)
3681                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3682 out:
3683         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3684         return status;
3685 out_overflow:
3686         print_overflow_msg(__func__, xdr);
3687 out_eio:
3688         status = -EIO;
3689         goto out;
3690 }
3691
3692 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3693 {
3694         __be32 *p;
3695         int status = 0;
3696
3697         *res = 0;
3698         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3699                 return -EIO;
3700         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3701                 p = xdr_inline_decode(xdr, 8);
3702                 if (unlikely(!p))
3703                         goto out_overflow;
3704                 xdr_decode_hyper(p, res);
3705                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3706         }
3707         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3708         return status;
3709 out_overflow:
3710         print_overflow_msg(__func__, xdr);
3711         return -EIO;
3712 }
3713
3714 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3715 {
3716         __be32 *p;
3717         int status = 0;
3718
3719         *maxlink = 1;
3720         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3721                 return -EIO;
3722         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3723                 p = xdr_inline_decode(xdr, 4);
3724                 if (unlikely(!p))
3725                         goto out_overflow;
3726                 *maxlink = be32_to_cpup(p);
3727                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3728         }
3729         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3730         return status;
3731 out_overflow:
3732         print_overflow_msg(__func__, xdr);
3733         return -EIO;
3734 }
3735
3736 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3737 {
3738         __be32 *p;
3739         int status = 0;
3740
3741         *maxname = 1024;
3742         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3743                 return -EIO;
3744         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3745                 p = xdr_inline_decode(xdr, 4);
3746                 if (unlikely(!p))
3747                         goto out_overflow;
3748                 *maxname = be32_to_cpup(p);
3749                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3750         }
3751         dprintk("%s: maxname=%u\n", __func__, *maxname);
3752         return status;
3753 out_overflow:
3754         print_overflow_msg(__func__, xdr);
3755         return -EIO;
3756 }
3757
3758 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3759 {
3760         __be32 *p;
3761         int status = 0;
3762
3763         *res = 1024;
3764         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3765                 return -EIO;
3766         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3767                 uint64_t maxread;
3768                 p = xdr_inline_decode(xdr, 8);
3769                 if (unlikely(!p))
3770                         goto out_overflow;
3771                 xdr_decode_hyper(p, &maxread);
3772                 if (maxread > 0x7FFFFFFF)
3773                         maxread = 0x7FFFFFFF;
3774                 *res = (uint32_t)maxread;
3775                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3776         }
3777         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3778         return status;
3779 out_overflow:
3780         print_overflow_msg(__func__, xdr);
3781         return -EIO;
3782 }
3783
3784 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3785 {
3786         __be32 *p;
3787         int status = 0;
3788
3789         *res = 1024;
3790         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3791                 return -EIO;
3792         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3793                 uint64_t maxwrite;
3794                 p = xdr_inline_decode(xdr, 8);
3795                 if (unlikely(!p))
3796                         goto out_overflow;
3797                 xdr_decode_hyper(p, &maxwrite);
3798                 if (maxwrite > 0x7FFFFFFF)
3799                         maxwrite = 0x7FFFFFFF;
3800                 *res = (uint32_t)maxwrite;
3801                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3802         }
3803         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3804         return status;
3805 out_overflow:
3806         print_overflow_msg(__func__, xdr);
3807         return -EIO;
3808 }
3809
3810 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3811 {
3812         uint32_t tmp;
3813         __be32 *p;
3814         int ret = 0;
3815
3816         *mode = 0;
3817         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3818                 return -EIO;
3819         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3820                 p = xdr_inline_decode(xdr, 4);
3821                 if (unlikely(!p))
3822                         goto out_overflow;
3823                 tmp = be32_to_cpup(p);
3824                 *mode = tmp & ~S_IFMT;
3825                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3826                 ret = NFS_ATTR_FATTR_MODE;
3827         }
3828         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3829         return ret;
3830 out_overflow:
3831         print_overflow_msg(__func__, xdr);
3832         return -EIO;
3833 }
3834
3835 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3836 {
3837         __be32 *p;
3838         int ret = 0;
3839
3840         *nlink = 1;
3841         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3842                 return -EIO;
3843         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3844                 p = xdr_inline_decode(xdr, 4);
3845                 if (unlikely(!p))
3846                         goto out_overflow;
3847                 *nlink = be32_to_cpup(p);
3848                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3849                 ret = NFS_ATTR_FATTR_NLINK;
3850         }
3851         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3852         return ret;
3853 out_overflow:
3854         print_overflow_msg(__func__, xdr);
3855         return -EIO;
3856 }
3857
3858 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3859                 const struct nfs_server *server, kuid_t *uid,
3860                 struct nfs4_string *owner_name)
3861 {
3862         uint32_t len;
3863         __be32 *p;
3864         int ret = 0;
3865
3866         *uid = make_kuid(&init_user_ns, -2);
3867         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3868                 return -EIO;
3869         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3870                 p = xdr_inline_decode(xdr, 4);
3871                 if (unlikely(!p))
3872                         goto out_overflow;
3873                 len = be32_to_cpup(p);
3874                 p = xdr_inline_decode(xdr, len);
3875                 if (unlikely(!p))
3876                         goto out_overflow;
3877                 if (owner_name != NULL) {
3878                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3879                         if (owner_name->data != NULL) {
3880                                 owner_name->len = len;
3881                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3882                         }
3883                 } else if (len < XDR_MAX_NETOBJ) {
3884                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3885                                 ret = NFS_ATTR_FATTR_OWNER;
3886                         else
3887                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3888                                                 __func__);
3889                 } else
3890                         dprintk("%s: name too long (%u)!\n",
3891                                         __func__, len);
3892                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3893         }
3894         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3895         return ret;
3896 out_overflow:
3897         print_overflow_msg(__func__, xdr);
3898         return -EIO;
3899 }
3900
3901 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3902                 const struct nfs_server *server, kgid_t *gid,
3903                 struct nfs4_string *group_name)
3904 {
3905         uint32_t len;
3906         __be32 *p;
3907         int ret = 0;
3908
3909         *gid = make_kgid(&init_user_ns, -2);
3910         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3911                 return -EIO;
3912         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3913                 p = xdr_inline_decode(xdr, 4);
3914                 if (unlikely(!p))
3915                         goto out_overflow;
3916                 len = be32_to_cpup(p);
3917                 p = xdr_inline_decode(xdr, len);
3918                 if (unlikely(!p))
3919                         goto out_overflow;
3920                 if (group_name != NULL) {
3921                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3922                         if (group_name->data != NULL) {
3923                                 group_name->len = len;
3924                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3925                         }
3926                 } else if (len < XDR_MAX_NETOBJ) {
3927                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3928                                 ret = NFS_ATTR_FATTR_GROUP;
3929                         else
3930                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3931                                                 __func__);
3932                 } else
3933                         dprintk("%s: name too long (%u)!\n",
3934                                         __func__, len);
3935                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3936         }
3937         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3938         return ret;
3939 out_overflow:
3940         print_overflow_msg(__func__, xdr);
3941         return -EIO;
3942 }
3943
3944 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3945 {
3946         uint32_t major = 0, minor = 0;
3947         __be32 *p;
3948         int ret = 0;
3949
3950         *rdev = MKDEV(0,0);
3951         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3952                 return -EIO;
3953         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3954                 dev_t tmp;
3955
3956                 p = xdr_inline_decode(xdr, 8);
3957                 if (unlikely(!p))
3958                         goto out_overflow;
3959                 major = be32_to_cpup(p++);
3960                 minor = be32_to_cpup(p);
3961                 tmp = MKDEV(major, minor);
3962                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3963                         *rdev = tmp;
3964                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3965                 ret = NFS_ATTR_FATTR_RDEV;
3966         }
3967         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3968         return ret;
3969 out_overflow:
3970         print_overflow_msg(__func__, xdr);
3971         return -EIO;
3972 }
3973
3974 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3975 {
3976         __be32 *p;
3977         int status = 0;
3978
3979         *res = 0;
3980         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3981                 return -EIO;
3982         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3983                 p = xdr_inline_decode(xdr, 8);
3984                 if (unlikely(!p))
3985                         goto out_overflow;
3986                 xdr_decode_hyper(p, res);
3987                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3988         }
3989         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3990         return status;
3991 out_overflow:
3992         print_overflow_msg(__func__, xdr);
3993         return -EIO;
3994 }
3995
3996 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3997 {
3998         __be32 *p;
3999         int status = 0;
4000
4001         *res = 0;
4002         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4003                 return -EIO;
4004         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4005                 p = xdr_inline_decode(xdr, 8);
4006                 if (unlikely(!p))
4007                         goto out_overflow;
4008                 xdr_decode_hyper(p, res);
4009                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4010         }
4011         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4012         return status;
4013 out_overflow:
4014         print_overflow_msg(__func__, xdr);
4015         return -EIO;
4016 }
4017
4018 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4019 {
4020         __be32 *p;
4021         int status = 0;
4022
4023         *res = 0;
4024         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4025                 return -EIO;
4026         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4027                 p = xdr_inline_decode(xdr, 8);
4028                 if (unlikely(!p))
4029                         goto out_overflow;
4030                 xdr_decode_hyper(p, res);
4031                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4032         }
4033         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4034         return status;
4035 out_overflow:
4036         print_overflow_msg(__func__, xdr);
4037         return -EIO;
4038 }
4039
4040 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4041 {
4042         __be32 *p;
4043         int ret = 0;
4044
4045         *used = 0;
4046         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4047                 return -EIO;
4048         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4049                 p = xdr_inline_decode(xdr, 8);
4050                 if (unlikely(!p))
4051                         goto out_overflow;
4052                 xdr_decode_hyper(p, used);
4053                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4054                 ret = NFS_ATTR_FATTR_SPACE_USED;
4055         }
4056         dprintk("%s: space used=%Lu\n", __func__,
4057                         (unsigned long long)*used);
4058         return ret;
4059 out_overflow:
4060         print_overflow_msg(__func__, xdr);
4061         return -EIO;
4062 }
4063
4064 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4065 {
4066         __be32 *p;
4067         uint64_t sec;
4068         uint32_t nsec;
4069
4070         p = xdr_inline_decode(xdr, 12);
4071         if (unlikely(!p))
4072                 goto out_overflow;
4073         p = xdr_decode_hyper(p, &sec);
4074         nsec = be32_to_cpup(p);
4075         time->tv_sec = (time_t)sec;
4076         time->tv_nsec = (long)nsec;
4077         return 0;
4078 out_overflow:
4079         print_overflow_msg(__func__, xdr);
4080         return -EIO;
4081 }
4082
4083 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4084 {
4085         int status = 0;
4086
4087         time->tv_sec = 0;
4088         time->tv_nsec = 0;
4089         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4090                 return -EIO;
4091         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4092                 status = decode_attr_time(xdr, time);
4093                 if (status == 0)
4094                         status = NFS_ATTR_FATTR_ATIME;
4095                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4096         }
4097         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4098         return status;
4099 }
4100
4101 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4102 {
4103         int status = 0;
4104
4105         time->tv_sec = 0;
4106         time->tv_nsec = 0;
4107         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4108                 return -EIO;
4109         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4110                 status = decode_attr_time(xdr, time);
4111                 if (status == 0)
4112                         status = NFS_ATTR_FATTR_CTIME;
4113                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4114         }
4115         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4116         return status;
4117 }
4118
4119 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4120                                   struct timespec *time)
4121 {
4122         int status = 0;
4123
4124         time->tv_sec = 0;
4125         time->tv_nsec = 0;
4126         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4127                 return -EIO;
4128         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4129                 status = decode_attr_time(xdr, time);
4130                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4131         }
4132         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4133                 (long)time->tv_nsec);
4134         return status;
4135 }
4136
4137 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4138                                         struct nfs4_label *label)
4139 {
4140         uint32_t pi = 0;
4141         uint32_t lfs = 0;
4142         __u32 len;
4143         __be32 *p;
4144         int status = 0;
4145
4146         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4147                 return -EIO;
4148         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4149                 p = xdr_inline_decode(xdr, 4);
4150                 if (unlikely(!p))
4151                         goto out_overflow;
4152                 lfs = be32_to_cpup(p++);
4153                 p = xdr_inline_decode(xdr, 4);
4154                 if (unlikely(!p))
4155                         goto out_overflow;
4156                 pi = be32_to_cpup(p++);
4157                 p = xdr_inline_decode(xdr, 4);
4158                 if (unlikely(!p))
4159                         goto out_overflow;
4160                 len = be32_to_cpup(p++);
4161                 p = xdr_inline_decode(xdr, len);
4162                 if (unlikely(!p))
4163                         goto out_overflow;
4164                 if (len < NFS4_MAXLABELLEN) {
4165                         if (label) {
4166                                 memcpy(label->label, p, len);
4167                                 label->len = len;
4168                                 label->pi = pi;
4169                                 label->lfs = lfs;
4170                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4171                         }
4172                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4173                 } else
4174                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4175                                         __func__, len);
4176         }
4177         if (label && label->label)
4178                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4179                         (char *)label->label, label->len, label->pi, label->lfs);
4180         return status;
4181
4182 out_overflow:
4183         print_overflow_msg(__func__, xdr);
4184         return -EIO;
4185 }
4186
4187 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4188 {
4189         int status = 0;
4190
4191         time->tv_sec = 0;
4192         time->tv_nsec = 0;
4193         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4194                 return -EIO;
4195         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4196                 status = decode_attr_time(xdr, time);
4197                 if (status == 0)
4198                         status = NFS_ATTR_FATTR_MTIME;
4199                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4200         }
4201         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4202         return status;
4203 }
4204
4205 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4206 {
4207         unsigned int attrwords = XDR_QUADLEN(attrlen);
4208         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4209
4210         if (unlikely(attrwords != nwords)) {
4211                 dprintk("%s: server returned incorrect attribute length: "
4212                         "%u %c %u\n",
4213                                 __func__,
4214                                 attrwords << 2,
4215                                 (attrwords < nwords) ? '<' : '>',
4216                                 nwords << 2);
4217                 return -EIO;
4218         }
4219         return 0;
4220 }
4221
4222 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4223 {
4224         __be32 *p;
4225
4226         p = xdr_inline_decode(xdr, 20);
4227         if (unlikely(!p))
4228                 goto out_overflow;
4229         cinfo->atomic = be32_to_cpup(p++);
4230         p = xdr_decode_hyper(p, &cinfo->before);
4231         xdr_decode_hyper(p, &cinfo->after);
4232         return 0;
4233 out_overflow:
4234         print_overflow_msg(__func__, xdr);
4235         return -EIO;
4236 }
4237
4238 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4239 {
4240         __be32 *p;
4241         uint32_t supp, acc;
4242         int status;
4243
4244         status = decode_op_hdr(xdr, OP_ACCESS);
4245         if (status)
4246                 return status;
4247         p = xdr_inline_decode(xdr, 8);
4248         if (unlikely(!p))
4249                 goto out_overflow;
4250         supp = be32_to_cpup(p++);
4251         acc = be32_to_cpup(p);
4252         *supported = supp;
4253         *access = acc;
4254         return 0;
4255 out_overflow:
4256         print_overflow_msg(__func__, xdr);
4257         return -EIO;
4258 }
4259
4260 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4261 {
4262         __be32 *p;
4263
4264         p = xdr_inline_decode(xdr, len);
4265         if (likely(p)) {
4266                 memcpy(buf, p, len);
4267                 return 0;
4268         }
4269         print_overflow_msg(__func__, xdr);
4270         return -EIO;
4271 }
4272
4273 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4274 {
4275         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4276 }
4277
4278 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280         stateid->type = NFS4_OPEN_STATEID_TYPE;
4281         return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286         stateid->type = NFS4_LOCK_STATEID_TYPE;
4287         return decode_stateid(xdr, stateid);
4288 }
4289
4290 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291 {
4292         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4293         return decode_stateid(xdr, stateid);
4294 }
4295
4296 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4297 {
4298         int status;
4299
4300         status = decode_op_hdr(xdr, OP_CLOSE);
4301         if (status != -EIO)
4302                 nfs_increment_open_seqid(status, res->seqid);
4303         if (!status)
4304                 status = decode_open_stateid(xdr, &res->stateid);
4305         return status;
4306 }
4307
4308 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4309 {
4310         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4314 {
4315         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4316 }
4317
4318 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4319 {
4320         int status;
4321
4322         status = decode_op_hdr(xdr, OP_COMMIT);
4323         if (!status)
4324                 status = decode_write_verifier(xdr, &res->verf->verifier);
4325         return status;
4326 }
4327
4328 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4329 {
4330         __be32 *p;
4331         uint32_t bmlen;
4332         int status;
4333
4334         status = decode_op_hdr(xdr, OP_CREATE);
4335         if (status)
4336                 return status;
4337         if ((status = decode_change_info(xdr, cinfo)))
4338                 return status;
4339         p = xdr_inline_decode(xdr, 4);
4340         if (unlikely(!p))
4341                 goto out_overflow;
4342         bmlen = be32_to_cpup(p);
4343         p = xdr_inline_decode(xdr, bmlen << 2);
4344         if (likely(p))
4345                 return 0;
4346 out_overflow:
4347         print_overflow_msg(__func__, xdr);
4348         return -EIO;
4349 }
4350
4351 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4352 {
4353         unsigned int savep;
4354         uint32_t attrlen, bitmap[3] = {0};
4355         int status;
4356
4357         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4366                                                  &res->fh_expire_type)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4369                 goto xdr_error;
4370         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4371                 goto xdr_error;
4372         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4373                 goto xdr_error;
4374         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4375                                 res->exclcreat_bitmask)) != 0)
4376                 goto xdr_error;
4377         status = verify_attr_len(xdr, savep, attrlen);
4378 xdr_error:
4379         dprintk("%s: xdr returned %d!\n", __func__, -status);
4380         return status;
4381 }
4382
4383 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4384 {
4385         unsigned int savep;
4386         uint32_t attrlen, bitmap[3] = {0};
4387         int status;
4388
4389         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4390                 goto xdr_error;
4391         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4394                 goto xdr_error;
4395
4396         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4401                 goto xdr_error;
4402
4403         status = -EIO;
4404         if (unlikely(bitmap[0]))
4405                 goto xdr_error;
4406
4407         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4410                 goto xdr_error;
4411         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4412                 goto xdr_error;
4413
4414         status = verify_attr_len(xdr, savep, attrlen);
4415 xdr_error:
4416         dprintk("%s: xdr returned %d!\n", __func__, -status);
4417         return status;
4418 }
4419
4420 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4421 {
4422         unsigned int savep;
4423         uint32_t attrlen, bitmap[3] = {0};
4424         int status;
4425
4426         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4427                 goto xdr_error;
4428         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4429                 goto xdr_error;
4430         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4431                 goto xdr_error;
4432
4433         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4436                 goto xdr_error;
4437
4438         status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440         dprintk("%s: xdr returned %d!\n", __func__, -status);
4441         return status;
4442 }
4443
4444 static int decode_threshold_hint(struct xdr_stream *xdr,
4445                                   uint32_t *bitmap,
4446                                   uint64_t *res,
4447                                   uint32_t hint_bit)
4448 {
4449         __be32 *p;
4450
4451         *res = 0;
4452         if (likely(bitmap[0] & hint_bit)) {
4453                 p = xdr_inline_decode(xdr, 8);
4454                 if (unlikely(!p))
4455                         goto out_overflow;
4456                 xdr_decode_hyper(p, res);
4457         }
4458         return 0;
4459 out_overflow:
4460         print_overflow_msg(__func__, xdr);
4461         return -EIO;
4462 }
4463
4464 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4465                                         struct nfs4_threshold *res)
4466 {
4467         __be32 *p;
4468         unsigned int savep;
4469         uint32_t bitmap[3] = {0,}, attrlen;
4470         int status;
4471
4472         /* layout type */
4473         p = xdr_inline_decode(xdr, 4);
4474         if (unlikely(!p)) {
4475                 print_overflow_msg(__func__, xdr);
4476                 return -EIO;
4477         }
4478         res->l_type = be32_to_cpup(p);
4479
4480         /* thi_hintset bitmap */
4481         status = decode_attr_bitmap(xdr, bitmap);
4482         if (status < 0)
4483                 goto xdr_error;
4484
4485         /* thi_hintlist length */
4486         status = decode_attr_length(xdr, &attrlen, &savep);
4487         if (status < 0)
4488                 goto xdr_error;
4489         /* thi_hintlist */
4490         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4491         if (status < 0)
4492                 goto xdr_error;
4493         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4494         if (status < 0)
4495                 goto xdr_error;
4496         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4497                                        THRESHOLD_RD_IO);
4498         if (status < 0)
4499                 goto xdr_error;
4500         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4501                                        THRESHOLD_WR_IO);
4502         if (status < 0)
4503                 goto xdr_error;
4504
4505         status = verify_attr_len(xdr, savep, attrlen);
4506         res->bm = bitmap[0];
4507
4508         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4509                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4510                 res->wr_io_sz);
4511 xdr_error:
4512         dprintk("%s ret=%d!\n", __func__, status);
4513         return status;
4514 }
4515
4516 /*
4517  * Thresholds on pNFS direct I/O vrs MDS I/O
4518  */
4519 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4520                                     uint32_t *bitmap,
4521                                     struct nfs4_threshold *res)
4522 {
4523         __be32 *p;
4524         int status = 0;
4525         uint32_t num;
4526
4527         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4528                 return -EIO;
4529         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4530                 /* Did the server return an unrequested attribute? */
4531                 if (unlikely(res == NULL))
4532                         return -EREMOTEIO;
4533                 p = xdr_inline_decode(xdr, 4);
4534                 if (unlikely(!p))
4535                         goto out_overflow;
4536                 num = be32_to_cpup(p);
4537                 if (num == 0)
4538                         return 0;
4539                 if (num > 1)
4540                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4541                                 "drivers per filesystem not supported\n",
4542                                 __func__);
4543
4544                 status = decode_first_threshold_item4(xdr, res);
4545                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4546         }
4547         return status;
4548 out_overflow:
4549         print_overflow_msg(__func__, xdr);
4550         return -EIO;
4551 }
4552
4553 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4554                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4555                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4556                 const struct nfs_server *server)
4557 {
4558         int status;
4559         umode_t fmode = 0;
4560         uint32_t type;
4561         int32_t err;
4562
4563         status = decode_attr_type(xdr, bitmap, &type);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->mode = 0;
4567         if (status != 0) {
4568                 fattr->mode |= nfs_type2fmt[type];
4569                 fattr->valid |= status;
4570         }
4571
4572         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4573         if (status < 0)
4574                 goto xdr_error;
4575         fattr->valid |= status;
4576
4577         status = decode_attr_size(xdr, bitmap, &fattr->size);
4578         if (status < 0)
4579                 goto xdr_error;
4580         fattr->valid |= status;
4581
4582         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4583         if (status < 0)
4584                 goto xdr_error;
4585         fattr->valid |= status;
4586
4587         err = 0;
4588         status = decode_attr_error(xdr, bitmap, &err);
4589         if (status < 0)
4590                 goto xdr_error;
4591
4592         status = decode_attr_filehandle(xdr, bitmap, fh);
4593         if (status < 0)
4594                 goto xdr_error;
4595
4596         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->valid |= status;
4600
4601         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4602         if (status < 0)
4603                 goto xdr_error;
4604         fattr->valid |= status;
4605
4606         status = -EIO;
4607         if (unlikely(bitmap[0]))
4608                 goto xdr_error;
4609
4610         status = decode_attr_mode(xdr, bitmap, &fmode);
4611         if (status < 0)
4612                 goto xdr_error;
4613         if (status != 0) {
4614                 fattr->mode |= fmode;
4615                 fattr->valid |= status;
4616         }
4617
4618         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4619         if (status < 0)
4620                 goto xdr_error;
4621         fattr->valid |= status;
4622
4623         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4624         if (status < 0)
4625                 goto xdr_error;
4626         fattr->valid |= status;
4627
4628         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4629         if (status < 0)
4630                 goto xdr_error;
4631         fattr->valid |= status;
4632
4633         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4634         if (status < 0)
4635                 goto xdr_error;
4636         fattr->valid |= status;
4637
4638         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4639         if (status < 0)
4640                 goto xdr_error;
4641         fattr->valid |= status;
4642
4643         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4644         if (status < 0)
4645                 goto xdr_error;
4646         fattr->valid |= status;
4647
4648         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4649         if (status < 0)
4650                 goto xdr_error;
4651         fattr->valid |= status;
4652
4653         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657
4658         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4659         if (status < 0)
4660                 goto xdr_error;
4661         fattr->valid |= status;
4662
4663         status = -EIO;
4664         if (unlikely(bitmap[1]))
4665                 goto xdr_error;
4666
4667         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4668         if (status < 0)
4669                 goto xdr_error;
4670
4671         if (label) {
4672                 status = decode_attr_security_label(xdr, bitmap, label);
4673                 if (status < 0)
4674                         goto xdr_error;
4675                 fattr->valid |= status;
4676         }
4677
4678 xdr_error:
4679         dprintk("%s: xdr returned %d\n", __func__, -status);
4680         return status;
4681 }
4682
4683 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4684                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4685                 struct nfs4_label *label, const struct nfs_server *server)
4686 {
4687         unsigned int savep;
4688         uint32_t attrlen,
4689                  bitmap[3] = {0};
4690         int status;
4691
4692         status = decode_op_hdr(xdr, OP_GETATTR);
4693         if (status < 0)
4694                 goto xdr_error;
4695
4696         status = decode_attr_bitmap(xdr, bitmap);
4697         if (status < 0)
4698                 goto xdr_error;
4699
4700         status = decode_attr_length(xdr, &attrlen, &savep);
4701         if (status < 0)
4702                 goto xdr_error;
4703
4704         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4705                                         label, server);
4706         if (status < 0)
4707                 goto xdr_error;
4708
4709         status = verify_attr_len(xdr, savep, attrlen);
4710 xdr_error:
4711         dprintk("%s: xdr returned %d\n", __func__, -status);
4712         return status;
4713 }
4714
4715 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4716                 struct nfs4_label *label, const struct nfs_server *server)
4717 {
4718         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4719 }
4720
4721 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4722                 const struct nfs_server *server)
4723 {
4724         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4725 }
4726
4727 /*
4728  * Decode potentially multiple layout types. Currently we only support
4729  * one layout driver per file system.
4730  */
4731 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4732                                          uint32_t *layouttype)
4733 {
4734         __be32 *p;
4735         int num;
4736
4737         p = xdr_inline_decode(xdr, 4);
4738         if (unlikely(!p))
4739                 goto out_overflow;
4740         num = be32_to_cpup(p);
4741
4742         /* pNFS is not supported by the underlying file system */
4743         if (num == 0) {
4744                 *layouttype = 0;
4745                 return 0;
4746         }
4747         if (num > 1)
4748                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4749                         "drivers per filesystem not supported\n", __func__);
4750
4751         /* Decode and set first layout type, move xdr->p past unused types */
4752         p = xdr_inline_decode(xdr, num * 4);
4753         if (unlikely(!p))
4754                 goto out_overflow;
4755         *layouttype = be32_to_cpup(p);
4756         return 0;
4757 out_overflow:
4758         print_overflow_msg(__func__, xdr);
4759         return -EIO;
4760 }
4761
4762 /*
4763  * The type of file system exported.
4764  * Note we must ensure that layouttype is set in any non-error case.
4765  */
4766 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4767                                 uint32_t *layouttype)
4768 {
4769         int status = 0;
4770
4771         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4772         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4773                 return -EIO;
4774         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4775                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4776                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4777         } else
4778                 *layouttype = 0;
4779         return status;
4780 }
4781
4782 /*
4783  * The prefered block size for layout directed io
4784  */
4785 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4786                                       uint32_t *res)
4787 {
4788         __be32 *p;
4789
4790         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4791         *res = 0;
4792         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4793                 p = xdr_inline_decode(xdr, 4);
4794                 if (unlikely(!p)) {
4795                         print_overflow_msg(__func__, xdr);
4796                         return -EIO;
4797                 }
4798                 *res = be32_to_cpup(p);
4799                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4800         }
4801         return 0;
4802 }
4803
4804 /*
4805  * The granularity of a CLONE operation.
4806  */
4807 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4808                                      uint32_t *res)
4809 {
4810         __be32 *p;
4811
4812         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4813         *res = 0;
4814         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4815                 p = xdr_inline_decode(xdr, 4);
4816                 if (unlikely(!p)) {
4817                         print_overflow_msg(__func__, xdr);
4818                         return -EIO;
4819                 }
4820                 *res = be32_to_cpup(p);
4821                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4822         }
4823         return 0;
4824 }
4825
4826 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4827 {
4828         unsigned int savep;
4829         uint32_t attrlen, bitmap[3];
4830         int status;
4831
4832         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4833                 goto xdr_error;
4834         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4835                 goto xdr_error;
4836         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4837                 goto xdr_error;
4838
4839         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4840
4841         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4842                 goto xdr_error;
4843         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4844                 goto xdr_error;
4845         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4846                 goto xdr_error;
4847         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4848         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4849                 goto xdr_error;
4850         fsinfo->wtpref = fsinfo->wtmax;
4851
4852         status = -EIO;
4853         if (unlikely(bitmap[0]))
4854                 goto xdr_error;
4855
4856         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4857         if (status != 0)
4858                 goto xdr_error;
4859         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4860         if (status != 0)
4861                 goto xdr_error;
4862
4863         status = -EIO;
4864         if (unlikely(bitmap[1]))
4865                 goto xdr_error;
4866
4867         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4868         if (status)
4869                 goto xdr_error;
4870         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4871         if (status)
4872                 goto xdr_error;
4873
4874         status = verify_attr_len(xdr, savep, attrlen);
4875 xdr_error:
4876         dprintk("%s: xdr returned %d!\n", __func__, -status);
4877         return status;
4878 }
4879
4880 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4881 {
4882         __be32 *p;
4883         uint32_t len;
4884         int status;
4885
4886         /* Zero handle first to allow comparisons */
4887         memset(fh, 0, sizeof(*fh));
4888
4889         status = decode_op_hdr(xdr, OP_GETFH);
4890         if (status)
4891                 return status;
4892
4893         p = xdr_inline_decode(xdr, 4);
4894         if (unlikely(!p))
4895                 goto out_overflow;
4896         len = be32_to_cpup(p);
4897         if (len > NFS4_FHSIZE)
4898                 return -EIO;
4899         fh->size = len;
4900         p = xdr_inline_decode(xdr, len);
4901         if (unlikely(!p))
4902                 goto out_overflow;
4903         memcpy(fh->data, p, len);
4904         return 0;
4905 out_overflow:
4906         print_overflow_msg(__func__, xdr);
4907         return -EIO;
4908 }
4909
4910 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4911 {
4912         int status;
4913
4914         status = decode_op_hdr(xdr, OP_LINK);
4915         if (status)
4916                 return status;
4917         return decode_change_info(xdr, cinfo);
4918 }
4919
4920 /*
4921  * We create the owner, so we know a proper owner.id length is 4.
4922  */
4923 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4924 {
4925         uint64_t offset, length, clientid;
4926         __be32 *p;
4927         uint32_t namelen, type;
4928
4929         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4930         if (unlikely(!p))
4931                 goto out_overflow;
4932         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4933         p = xdr_decode_hyper(p, &length);
4934         type = be32_to_cpup(p++); /* 4 byte read */
4935         if (fl != NULL) { /* manipulate file lock */
4936                 fl->fl_start = (loff_t)offset;
4937                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4938                 if (length == ~(uint64_t)0)
4939                         fl->fl_end = OFFSET_MAX;
4940                 fl->fl_type = F_WRLCK;
4941                 if (type & 1)
4942                         fl->fl_type = F_RDLCK;
4943                 fl->fl_pid = 0;
4944         }
4945         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4946         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4947         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4948         if (likely(p))
4949                 return -NFS4ERR_DENIED;
4950 out_overflow:
4951         print_overflow_msg(__func__, xdr);
4952         return -EIO;
4953 }
4954
4955 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4956 {
4957         int status;
4958
4959         status = decode_op_hdr(xdr, OP_LOCK);
4960         if (status == -EIO)
4961                 goto out;
4962         if (status == 0) {
4963                 status = decode_lock_stateid(xdr, &res->stateid);
4964                 if (unlikely(status))
4965                         goto out;
4966         } else if (status == -NFS4ERR_DENIED)
4967                 status = decode_lock_denied(xdr, NULL);
4968         if (res->open_seqid != NULL)
4969                 nfs_increment_open_seqid(status, res->open_seqid);
4970         nfs_increment_lock_seqid(status, res->lock_seqid);
4971 out:
4972         return status;
4973 }
4974
4975 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4976 {
4977         int status;
4978         status = decode_op_hdr(xdr, OP_LOCKT);
4979         if (status == -NFS4ERR_DENIED)
4980                 return decode_lock_denied(xdr, res->denied);
4981         return status;
4982 }
4983
4984 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4985 {
4986         int status;
4987
4988         status = decode_op_hdr(xdr, OP_LOCKU);
4989         if (status != -EIO)
4990                 nfs_increment_lock_seqid(status, res->seqid);
4991         if (status == 0)
4992                 status = decode_lock_stateid(xdr, &res->stateid);
4993         return status;
4994 }
4995
4996 static int decode_release_lockowner(struct xdr_stream *xdr)
4997 {
4998         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4999 }
5000
5001 static int decode_lookup(struct xdr_stream *xdr)
5002 {
5003         return decode_op_hdr(xdr, OP_LOOKUP);
5004 }
5005
5006 /* This is too sick! */
5007 static int decode_space_limit(struct xdr_stream *xdr,
5008                 unsigned long *pagemod_limit)
5009 {
5010         __be32 *p;
5011         uint32_t limit_type, nblocks, blocksize;
5012         u64 maxsize = 0;
5013
5014         p = xdr_inline_decode(xdr, 12);
5015         if (unlikely(!p))
5016                 goto out_overflow;
5017         limit_type = be32_to_cpup(p++);
5018         switch (limit_type) {
5019         case NFS4_LIMIT_SIZE:
5020                 xdr_decode_hyper(p, &maxsize);
5021                 break;
5022         case NFS4_LIMIT_BLOCKS:
5023                 nblocks = be32_to_cpup(p++);
5024                 blocksize = be32_to_cpup(p);
5025                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5026         }
5027         maxsize >>= PAGE_SHIFT;
5028         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5029         return 0;
5030 out_overflow:
5031         print_overflow_msg(__func__, xdr);
5032         return -EIO;
5033 }
5034
5035 static int decode_rw_delegation(struct xdr_stream *xdr,
5036                 uint32_t delegation_type,
5037                 struct nfs_openres *res)
5038 {
5039         __be32 *p;
5040         int status;
5041
5042         status = decode_delegation_stateid(xdr, &res->delegation);
5043         if (unlikely(status))
5044                 return status;
5045         p = xdr_inline_decode(xdr, 4);
5046         if (unlikely(!p))
5047                 goto out_overflow;
5048         res->do_recall = be32_to_cpup(p);
5049
5050         switch (delegation_type) {
5051         case NFS4_OPEN_DELEGATE_READ:
5052                 res->delegation_type = FMODE_READ;
5053                 break;
5054         case NFS4_OPEN_DELEGATE_WRITE:
5055                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5056                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5057                                 return -EIO;
5058         }
5059         return decode_ace(xdr, NULL, res->server->nfs_client);
5060 out_overflow:
5061         print_overflow_msg(__func__, xdr);
5062         return -EIO;
5063 }
5064
5065 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5066 {
5067         __be32 *p;
5068         uint32_t why_no_delegation;
5069
5070         p = xdr_inline_decode(xdr, 4);
5071         if (unlikely(!p))
5072                 goto out_overflow;
5073         why_no_delegation = be32_to_cpup(p);
5074         switch (why_no_delegation) {
5075                 case WND4_CONTENTION:
5076                 case WND4_RESOURCE:
5077                         xdr_inline_decode(xdr, 4);
5078                         /* Ignore for now */
5079         }
5080         return 0;
5081 out_overflow:
5082         print_overflow_msg(__func__, xdr);
5083         return -EIO;
5084 }
5085
5086 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5087 {
5088         __be32 *p;
5089         uint32_t delegation_type;
5090
5091         p = xdr_inline_decode(xdr, 4);
5092         if (unlikely(!p))
5093                 goto out_overflow;
5094         delegation_type = be32_to_cpup(p);
5095         res->delegation_type = 0;
5096         switch (delegation_type) {
5097         case NFS4_OPEN_DELEGATE_NONE:
5098                 return 0;
5099         case NFS4_OPEN_DELEGATE_READ:
5100         case NFS4_OPEN_DELEGATE_WRITE:
5101                 return decode_rw_delegation(xdr, delegation_type, res);
5102         case NFS4_OPEN_DELEGATE_NONE_EXT:
5103                 return decode_no_delegation(xdr, res);
5104         }
5105         return -EIO;
5106 out_overflow:
5107         print_overflow_msg(__func__, xdr);
5108         return -EIO;
5109 }
5110
5111 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5112 {
5113         __be32 *p;
5114         uint32_t savewords, bmlen, i;
5115         int status;
5116
5117         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5118                 return status;
5119         nfs_increment_open_seqid(status, res->seqid);
5120         if (status)
5121                 return status;
5122         status = decode_open_stateid(xdr, &res->stateid);
5123         if (unlikely(status))
5124                 return status;
5125
5126         decode_change_info(xdr, &res->cinfo);
5127
5128         p = xdr_inline_decode(xdr, 8);
5129         if (unlikely(!p))
5130                 goto out_overflow;
5131         res->rflags = be32_to_cpup(p++);
5132         bmlen = be32_to_cpup(p);
5133         if (bmlen > 10)
5134                 goto xdr_error;
5135
5136         p = xdr_inline_decode(xdr, bmlen << 2);
5137         if (unlikely(!p))
5138                 goto out_overflow;
5139         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5140         for (i = 0; i < savewords; ++i)
5141                 res->attrset[i] = be32_to_cpup(p++);
5142         for (; i < NFS4_BITMAP_SIZE; i++)
5143                 res->attrset[i] = 0;
5144
5145         return decode_delegation(xdr, res);
5146 xdr_error:
5147         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5148         return -EIO;
5149 out_overflow:
5150         print_overflow_msg(__func__, xdr);
5151         return -EIO;
5152 }
5153
5154 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5155 {
5156         int status;
5157
5158         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5159         if (status != -EIO)
5160                 nfs_increment_open_seqid(status, res->seqid);
5161         if (!status)
5162                 status = decode_open_stateid(xdr, &res->stateid);
5163         return status;
5164 }
5165
5166 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5167 {
5168         int status;
5169
5170         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5171         if (status != -EIO)
5172                 nfs_increment_open_seqid(status, res->seqid);
5173         if (!status)
5174                 status = decode_open_stateid(xdr, &res->stateid);
5175         return status;
5176 }
5177
5178 static int decode_putfh(struct xdr_stream *xdr)
5179 {
5180         return decode_op_hdr(xdr, OP_PUTFH);
5181 }
5182
5183 static int decode_putrootfh(struct xdr_stream *xdr)
5184 {
5185         return decode_op_hdr(xdr, OP_PUTROOTFH);
5186 }
5187
5188 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5189                        struct nfs_pgio_res *res)
5190 {
5191         __be32 *p;
5192         uint32_t count, eof, recvd;
5193         int status;
5194
5195         status = decode_op_hdr(xdr, OP_READ);
5196         if (status)
5197                 return status;
5198         p = xdr_inline_decode(xdr, 8);
5199         if (unlikely(!p))
5200                 goto out_overflow;
5201         eof = be32_to_cpup(p++);
5202         count = be32_to_cpup(p);
5203         recvd = xdr_read_pages(xdr, count);
5204         if (count > recvd) {
5205                 dprintk("NFS: server cheating in read reply: "
5206                                 "count %u > recvd %u\n", count, recvd);
5207                 count = recvd;
5208                 eof = 0;
5209         }
5210         res->eof = eof;
5211         res->count = count;
5212         return 0;
5213 out_overflow:
5214         print_overflow_msg(__func__, xdr);
5215         return -EIO;
5216 }
5217
5218 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5219 {
5220         int             status;
5221         __be32          verf[2];
5222
5223         status = decode_op_hdr(xdr, OP_READDIR);
5224         if (!status)
5225                 status = decode_verifier(xdr, readdir->verifier.data);
5226         if (unlikely(status))
5227                 return status;
5228         memcpy(verf, readdir->verifier.data, sizeof(verf));
5229         dprintk("%s: verifier = %08x:%08x\n",
5230                         __func__, verf[0], verf[1]);
5231         return xdr_read_pages(xdr, xdr->buf->page_len);
5232 }
5233
5234 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5235 {
5236         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5237         u32 len, recvd;
5238         __be32 *p;
5239         int status;
5240
5241         status = decode_op_hdr(xdr, OP_READLINK);
5242         if (status)
5243                 return status;
5244
5245         /* Convert length of symlink */
5246         p = xdr_inline_decode(xdr, 4);
5247         if (unlikely(!p))
5248                 goto out_overflow;
5249         len = be32_to_cpup(p);
5250         if (len >= rcvbuf->page_len || len <= 0) {
5251                 dprintk("nfs: server returned giant symlink!\n");
5252                 return -ENAMETOOLONG;
5253         }
5254         recvd = xdr_read_pages(xdr, len);
5255         if (recvd < len) {
5256                 dprintk("NFS: server cheating in readlink reply: "
5257                                 "count %u > recvd %u\n", len, recvd);
5258                 return -EIO;
5259         }
5260         /*
5261          * The XDR encode routine has set things up so that
5262          * the link text will be copied directly into the
5263          * buffer.  We just have to do overflow-checking,
5264          * and and null-terminate the text (the VFS expects
5265          * null-termination).
5266          */
5267         xdr_terminate_string(rcvbuf, len);
5268         return 0;
5269 out_overflow:
5270         print_overflow_msg(__func__, xdr);
5271         return -EIO;
5272 }
5273
5274 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5275 {
5276         int status;
5277
5278         status = decode_op_hdr(xdr, OP_REMOVE);
5279         if (status)
5280                 goto out;
5281         status = decode_change_info(xdr, cinfo);
5282 out:
5283         return status;
5284 }
5285
5286 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5287               struct nfs4_change_info *new_cinfo)
5288 {
5289         int status;
5290
5291         status = decode_op_hdr(xdr, OP_RENAME);
5292         if (status)
5293                 goto out;
5294         if ((status = decode_change_info(xdr, old_cinfo)))
5295                 goto out;
5296         status = decode_change_info(xdr, new_cinfo);
5297 out:
5298         return status;
5299 }
5300
5301 static int decode_renew(struct xdr_stream *xdr)
5302 {
5303         return decode_op_hdr(xdr, OP_RENEW);
5304 }
5305
5306 static int
5307 decode_restorefh(struct xdr_stream *xdr)
5308 {
5309         return decode_op_hdr(xdr, OP_RESTOREFH);
5310 }
5311
5312 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5313                          struct nfs_getaclres *res)
5314 {
5315         unsigned int savep;
5316         uint32_t attrlen,
5317                  bitmap[3] = {0};
5318         int status;
5319         unsigned int pg_offset;
5320
5321         res->acl_len = 0;
5322         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5323                 goto out;
5324
5325         xdr_enter_page(xdr, xdr->buf->page_len);
5326
5327         /* Calculate the offset of the page data */
5328         pg_offset = xdr->buf->head[0].iov_len;
5329
5330         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5331                 goto out;
5332         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5333                 goto out;
5334
5335         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5336                 return -EIO;
5337         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5338
5339                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5340                  * are stored with the acl data to handle the problem of
5341                  * variable length bitmaps.*/
5342                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5343                 res->acl_len = attrlen;
5344
5345                 /* Check for receive buffer overflow */
5346                 if (res->acl_len > (xdr->nwords << 2) ||
5347                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5348                         res->acl_flags |= NFS4_ACL_TRUNC;
5349                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5350                                         attrlen, xdr->nwords << 2);
5351                 }
5352         } else
5353                 status = -EOPNOTSUPP;
5354
5355 out:
5356         return status;
5357 }
5358
5359 static int
5360 decode_savefh(struct xdr_stream *xdr)
5361 {
5362         return decode_op_hdr(xdr, OP_SAVEFH);
5363 }
5364
5365 static int decode_setattr(struct xdr_stream *xdr)
5366 {
5367         __be32 *p;
5368         uint32_t bmlen;
5369         int status;
5370
5371         status = decode_op_hdr(xdr, OP_SETATTR);
5372         if (status)
5373                 return status;
5374         p = xdr_inline_decode(xdr, 4);
5375         if (unlikely(!p))
5376                 goto out_overflow;
5377         bmlen = be32_to_cpup(p);
5378         p = xdr_inline_decode(xdr, bmlen << 2);
5379         if (likely(p))
5380                 return 0;
5381 out_overflow:
5382         print_overflow_msg(__func__, xdr);
5383         return -EIO;
5384 }
5385
5386 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5387 {
5388         __be32 *p;
5389         uint32_t opnum;
5390         int32_t nfserr;
5391
5392         p = xdr_inline_decode(xdr, 8);
5393         if (unlikely(!p))
5394                 goto out_overflow;
5395         opnum = be32_to_cpup(p++);
5396         if (opnum != OP_SETCLIENTID) {
5397                 dprintk("nfs: decode_setclientid: Server returned operation"
5398                         " %d\n", opnum);
5399                 return -EIO;
5400         }
5401         nfserr = be32_to_cpup(p);
5402         if (nfserr == NFS_OK) {
5403                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5404                 if (unlikely(!p))
5405                         goto out_overflow;
5406                 p = xdr_decode_hyper(p, &res->clientid);
5407                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5408         } else if (nfserr == NFSERR_CLID_INUSE) {
5409                 uint32_t len;
5410
5411                 /* skip netid string */
5412                 p = xdr_inline_decode(xdr, 4);
5413                 if (unlikely(!p))
5414                         goto out_overflow;
5415                 len = be32_to_cpup(p);
5416                 p = xdr_inline_decode(xdr, len);
5417                 if (unlikely(!p))
5418                         goto out_overflow;
5419
5420                 /* skip uaddr string */
5421                 p = xdr_inline_decode(xdr, 4);
5422                 if (unlikely(!p))
5423                         goto out_overflow;
5424                 len = be32_to_cpup(p);
5425                 p = xdr_inline_decode(xdr, len);
5426                 if (unlikely(!p))
5427                         goto out_overflow;
5428                 return -NFSERR_CLID_INUSE;
5429         } else
5430                 return nfs4_stat_to_errno(nfserr);
5431
5432         return 0;
5433 out_overflow:
5434         print_overflow_msg(__func__, xdr);
5435         return -EIO;
5436 }
5437
5438 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5439 {
5440         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5441 }
5442
5443 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5444 {
5445         __be32 *p;
5446         int status;
5447
5448         status = decode_op_hdr(xdr, OP_WRITE);
5449         if (status)
5450                 return status;
5451
5452         p = xdr_inline_decode(xdr, 8);
5453         if (unlikely(!p))
5454                 goto out_overflow;
5455         res->count = be32_to_cpup(p++);
5456         res->verf->committed = be32_to_cpup(p++);
5457         return decode_write_verifier(xdr, &res->verf->verifier);
5458 out_overflow:
5459         print_overflow_msg(__func__, xdr);
5460         return -EIO;
5461 }
5462
5463 static int decode_delegreturn(struct xdr_stream *xdr)
5464 {
5465         return decode_op_hdr(xdr, OP_DELEGRETURN);
5466 }
5467
5468 static int decode_secinfo_gss(struct xdr_stream *xdr,
5469                               struct nfs4_secinfo4 *flavor)
5470 {
5471         u32 oid_len;
5472         __be32 *p;
5473
5474         p = xdr_inline_decode(xdr, 4);
5475         if (unlikely(!p))
5476                 goto out_overflow;
5477         oid_len = be32_to_cpup(p);
5478         if (oid_len > GSS_OID_MAX_LEN)
5479                 goto out_err;
5480
5481         p = xdr_inline_decode(xdr, oid_len);
5482         if (unlikely(!p))
5483                 goto out_overflow;
5484         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5485         flavor->flavor_info.oid.len = oid_len;
5486
5487         p = xdr_inline_decode(xdr, 8);
5488         if (unlikely(!p))
5489                 goto out_overflow;
5490         flavor->flavor_info.qop = be32_to_cpup(p++);
5491         flavor->flavor_info.service = be32_to_cpup(p);
5492
5493         return 0;
5494
5495 out_overflow:
5496         print_overflow_msg(__func__, xdr);
5497         return -EIO;
5498 out_err:
5499         return -EINVAL;
5500 }
5501
5502 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5503 {
5504         struct nfs4_secinfo4 *sec_flavor;
5505         unsigned int i, num_flavors;
5506         int status;
5507         __be32 *p;
5508
5509         p = xdr_inline_decode(xdr, 4);
5510         if (unlikely(!p))
5511                 goto out_overflow;
5512
5513         res->flavors->num_flavors = 0;
5514         num_flavors = be32_to_cpup(p);
5515
5516         for (i = 0; i < num_flavors; i++) {
5517                 sec_flavor = &res->flavors->flavors[i];
5518                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5519                         break;
5520
5521                 p = xdr_inline_decode(xdr, 4);
5522                 if (unlikely(!p))
5523                         goto out_overflow;
5524                 sec_flavor->flavor = be32_to_cpup(p);
5525
5526                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5527                         status = decode_secinfo_gss(xdr, sec_flavor);
5528                         if (status)
5529                                 goto out;
5530                 }
5531                 res->flavors->num_flavors++;
5532         }
5533
5534         status = 0;
5535 out:
5536         return status;
5537 out_overflow:
5538         print_overflow_msg(__func__, xdr);
5539         return -EIO;
5540 }
5541
5542 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5543 {
5544         int status = decode_op_hdr(xdr, OP_SECINFO);
5545         if (status)
5546                 return status;
5547         return decode_secinfo_common(xdr, res);
5548 }
5549
5550 #if defined(CONFIG_NFS_V4_1)
5551 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5552 {
5553         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5554         if (status)
5555                 return status;
5556         return decode_secinfo_common(xdr, res);
5557 }
5558
5559 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5560 {
5561         __be32 *p;
5562         uint32_t bitmap_words;
5563         unsigned int i;
5564
5565         p = xdr_inline_decode(xdr, 4);
5566         bitmap_words = be32_to_cpup(p++);
5567         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5568                 return -EIO;
5569         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5570         for (i = 0; i < bitmap_words; i++)
5571                 op_map->u.words[i] = be32_to_cpup(p++);
5572
5573         return 0;
5574 }
5575
5576 static int decode_exchange_id(struct xdr_stream *xdr,
5577                               struct nfs41_exchange_id_res *res)
5578 {
5579         __be32 *p;
5580         uint32_t dummy;
5581         char *dummy_str;
5582         int status;
5583         uint32_t impl_id_count;
5584
5585         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5586         if (status)
5587                 return status;
5588
5589         p = xdr_inline_decode(xdr, 8);
5590         if (unlikely(!p))
5591                 goto out_overflow;
5592         xdr_decode_hyper(p, &res->clientid);
5593         p = xdr_inline_decode(xdr, 12);
5594         if (unlikely(!p))
5595                 goto out_overflow;
5596         res->seqid = be32_to_cpup(p++);
5597         res->flags = be32_to_cpup(p++);
5598
5599         res->state_protect.how = be32_to_cpup(p);
5600         switch (res->state_protect.how) {
5601         case SP4_NONE:
5602                 break;
5603         case SP4_MACH_CRED:
5604                 status = decode_op_map(xdr, &res->state_protect.enforce);
5605                 if (status)
5606                         return status;
5607                 status = decode_op_map(xdr, &res->state_protect.allow);
5608                 if (status)
5609                         return status;
5610                 break;
5611         default:
5612                 WARN_ON_ONCE(1);
5613                 return -EIO;
5614         }
5615
5616         /* server_owner4.so_minor_id */
5617         p = xdr_inline_decode(xdr, 8);
5618         if (unlikely(!p))
5619                 goto out_overflow;
5620         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5621
5622         /* server_owner4.so_major_id */
5623         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5624         if (unlikely(status))
5625                 return status;
5626         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5627                 return -EIO;
5628         memcpy(res->server_owner->major_id, dummy_str, dummy);
5629         res->server_owner->major_id_sz = dummy;
5630
5631         /* server_scope4 */
5632         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5633         if (unlikely(status))
5634                 return status;
5635         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5636                 return -EIO;
5637         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5638         res->server_scope->server_scope_sz = dummy;
5639
5640         /* Implementation Id */
5641         p = xdr_inline_decode(xdr, 4);
5642         if (unlikely(!p))
5643                 goto out_overflow;
5644         impl_id_count = be32_to_cpup(p++);
5645
5646         if (impl_id_count) {
5647                 /* nii_domain */
5648                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5649                 if (unlikely(status))
5650                         return status;
5651                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5652                         return -EIO;
5653                 memcpy(res->impl_id->domain, dummy_str, dummy);
5654
5655                 /* nii_name */
5656                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5657                 if (unlikely(status))
5658                         return status;
5659                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5660                         return -EIO;
5661                 memcpy(res->impl_id->name, dummy_str, dummy);
5662
5663                 /* nii_date */
5664                 p = xdr_inline_decode(xdr, 12);
5665                 if (unlikely(!p))
5666                         goto out_overflow;
5667                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5668                 res->impl_id->date.nseconds = be32_to_cpup(p);
5669
5670                 /* if there's more than one entry, ignore the rest */
5671         }
5672         return 0;
5673 out_overflow:
5674         print_overflow_msg(__func__, xdr);
5675         return -EIO;
5676 }
5677
5678 static int decode_chan_attrs(struct xdr_stream *xdr,
5679                              struct nfs4_channel_attrs *attrs)
5680 {
5681         __be32 *p;
5682         u32 nr_attrs, val;
5683
5684         p = xdr_inline_decode(xdr, 28);
5685         if (unlikely(!p))
5686                 goto out_overflow;
5687         val = be32_to_cpup(p++);        /* headerpadsz */
5688         if (val)
5689                 return -EINVAL;         /* no support for header padding yet */
5690         attrs->max_rqst_sz = be32_to_cpup(p++);
5691         attrs->max_resp_sz = be32_to_cpup(p++);
5692         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5693         attrs->max_ops = be32_to_cpup(p++);
5694         attrs->max_reqs = be32_to_cpup(p++);
5695         nr_attrs = be32_to_cpup(p);
5696         if (unlikely(nr_attrs > 1)) {
5697                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5698                         "count %u\n", __func__, nr_attrs);
5699                 return -EINVAL;
5700         }
5701         if (nr_attrs == 1) {
5702                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5703                 if (unlikely(!p))
5704                         goto out_overflow;
5705         }
5706         return 0;
5707 out_overflow:
5708         print_overflow_msg(__func__, xdr);
5709         return -EIO;
5710 }
5711
5712 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5713 {
5714         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5715 }
5716
5717 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5718                                 struct nfs41_bind_conn_to_session_res *res)
5719 {
5720         __be32 *p;
5721         int status;
5722
5723         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5724         if (!status)
5725                 status = decode_sessionid(xdr, &res->sessionid);
5726         if (unlikely(status))
5727                 return status;
5728
5729         /* dir flags, rdma mode bool */
5730         p = xdr_inline_decode(xdr, 8);
5731         if (unlikely(!p))
5732                 goto out_overflow;
5733
5734         res->dir = be32_to_cpup(p++);
5735         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5736                 return -EIO;
5737         if (be32_to_cpup(p) == 0)
5738                 res->use_conn_in_rdma_mode = false;
5739         else
5740                 res->use_conn_in_rdma_mode = true;
5741
5742         return 0;
5743 out_overflow:
5744         print_overflow_msg(__func__, xdr);
5745         return -EIO;
5746 }
5747
5748 static int decode_create_session(struct xdr_stream *xdr,
5749                                  struct nfs41_create_session_res *res)
5750 {
5751         __be32 *p;
5752         int status;
5753
5754         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5755         if (!status)
5756                 status = decode_sessionid(xdr, &res->sessionid);
5757         if (unlikely(status))
5758                 return status;
5759
5760         /* seqid, flags */
5761         p = xdr_inline_decode(xdr, 8);
5762         if (unlikely(!p))
5763                 goto out_overflow;
5764         res->seqid = be32_to_cpup(p++);
5765         res->flags = be32_to_cpup(p);
5766
5767         /* Channel attributes */
5768         status = decode_chan_attrs(xdr, &res->fc_attrs);
5769         if (!status)
5770                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5771         return status;
5772 out_overflow:
5773         print_overflow_msg(__func__, xdr);
5774         return -EIO;
5775 }
5776
5777 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5778 {
5779         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5780 }
5781
5782 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5783 {
5784         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5785 }
5786
5787 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5788 {
5789         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5790 }
5791 #endif /* CONFIG_NFS_V4_1 */
5792
5793 static int decode_sequence(struct xdr_stream *xdr,
5794                            struct nfs4_sequence_res *res,
5795                            struct rpc_rqst *rqstp)
5796 {
5797 #if defined(CONFIG_NFS_V4_1)
5798         struct nfs4_session *session;
5799         struct nfs4_sessionid id;
5800         u32 dummy;
5801         int status;
5802         __be32 *p;
5803
5804         if (res->sr_slot == NULL)
5805                 return 0;
5806         if (!res->sr_slot->table->session)
5807                 return 0;
5808
5809         status = decode_op_hdr(xdr, OP_SEQUENCE);
5810         if (!status)
5811                 status = decode_sessionid(xdr, &id);
5812         if (unlikely(status))
5813                 goto out_err;
5814
5815         /*
5816          * If the server returns different values for sessionID, slotID or
5817          * sequence number, the server is looney tunes.
5818          */
5819         status = -EREMOTEIO;
5820         session = res->sr_slot->table->session;
5821
5822         if (memcmp(id.data, session->sess_id.data,
5823                    NFS4_MAX_SESSIONID_LEN)) {
5824                 dprintk("%s Invalid session id\n", __func__);
5825                 goto out_err;
5826         }
5827
5828         p = xdr_inline_decode(xdr, 20);
5829         if (unlikely(!p))
5830                 goto out_overflow;
5831
5832         /* seqid */
5833         dummy = be32_to_cpup(p++);
5834         if (dummy != res->sr_slot->seq_nr) {
5835                 dprintk("%s Invalid sequence number\n", __func__);
5836                 goto out_err;
5837         }
5838         /* slot id */
5839         dummy = be32_to_cpup(p++);
5840         if (dummy != res->sr_slot->slot_nr) {
5841                 dprintk("%s Invalid slot id\n", __func__);
5842                 goto out_err;
5843         }
5844         /* highest slot id */
5845         res->sr_highest_slotid = be32_to_cpup(p++);
5846         /* target highest slot id */
5847         res->sr_target_highest_slotid = be32_to_cpup(p++);
5848         /* result flags */
5849         res->sr_status_flags = be32_to_cpup(p);
5850         status = 0;
5851 out_err:
5852         res->sr_status = status;
5853         return status;
5854 out_overflow:
5855         print_overflow_msg(__func__, xdr);
5856         status = -EIO;
5857         goto out_err;
5858 #else  /* CONFIG_NFS_V4_1 */
5859         return 0;
5860 #endif /* CONFIG_NFS_V4_1 */
5861 }
5862
5863 #if defined(CONFIG_NFS_V4_1)
5864 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5865 {
5866         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5867         return decode_stateid(xdr, stateid);
5868 }
5869
5870 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5871                                 struct nfs4_getdeviceinfo_res *res)
5872 {
5873         struct pnfs_device *pdev = res->pdev;
5874         __be32 *p;
5875         uint32_t len, type;
5876         int status;
5877
5878         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5879         if (status) {
5880                 if (status == -ETOOSMALL) {
5881                         p = xdr_inline_decode(xdr, 4);
5882                         if (unlikely(!p))
5883                                 goto out_overflow;
5884                         pdev->mincount = be32_to_cpup(p);
5885                         dprintk("%s: Min count too small. mincnt = %u\n",
5886                                 __func__, pdev->mincount);
5887                 }
5888                 return status;
5889         }
5890
5891         p = xdr_inline_decode(xdr, 8);
5892         if (unlikely(!p))
5893                 goto out_overflow;
5894         type = be32_to_cpup(p++);
5895         if (type != pdev->layout_type) {
5896                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5897                         __func__, pdev->layout_type, type);
5898                 return -EINVAL;
5899         }
5900         /*
5901          * Get the length of the opaque device_addr4. xdr_read_pages places
5902          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5903          * and places the remaining xdr data in xdr_buf->tail
5904          */
5905         pdev->mincount = be32_to_cpup(p);
5906         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5907                 goto out_overflow;
5908
5909         /* Parse notification bitmap, verifying that it is zero. */
5910         p = xdr_inline_decode(xdr, 4);
5911         if (unlikely(!p))
5912                 goto out_overflow;
5913         len = be32_to_cpup(p);
5914         if (len) {
5915                 uint32_t i;
5916
5917                 p = xdr_inline_decode(xdr, 4 * len);
5918                 if (unlikely(!p))
5919                         goto out_overflow;
5920
5921                 res->notification = be32_to_cpup(p++);
5922                 for (i = 1; i < len; i++) {
5923                         if (be32_to_cpup(p++)) {
5924                                 dprintk("%s: unsupported notification\n",
5925                                         __func__);
5926                                 return -EIO;
5927                         }
5928                 }
5929         }
5930         return 0;
5931 out_overflow:
5932         print_overflow_msg(__func__, xdr);
5933         return -EIO;
5934 }
5935
5936 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5937                             struct nfs4_layoutget_res *res)
5938 {
5939         __be32 *p;
5940         int status;
5941         u32 layout_count;
5942         u32 recvd;
5943
5944         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5945         if (status)
5946                 return status;
5947         p = xdr_inline_decode(xdr, 4);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         res->return_on_close = be32_to_cpup(p);
5951         decode_layout_stateid(xdr, &res->stateid);
5952         p = xdr_inline_decode(xdr, 4);
5953         if (unlikely(!p))
5954                 goto out_overflow;
5955         layout_count = be32_to_cpup(p);
5956         if (!layout_count) {
5957                 dprintk("%s: server responded with empty layout array\n",
5958                         __func__);
5959                 return -EINVAL;
5960         }
5961
5962         p = xdr_inline_decode(xdr, 28);
5963         if (unlikely(!p))
5964                 goto out_overflow;
5965         p = xdr_decode_hyper(p, &res->range.offset);
5966         p = xdr_decode_hyper(p, &res->range.length);
5967         res->range.iomode = be32_to_cpup(p++);
5968         res->type = be32_to_cpup(p++);
5969         res->layoutp->len = be32_to_cpup(p);
5970
5971         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5972                 __func__,
5973                 (unsigned long)res->range.offset,
5974                 (unsigned long)res->range.length,
5975                 res->range.iomode,
5976                 res->type,
5977                 res->layoutp->len);
5978
5979         recvd = xdr_read_pages(xdr, res->layoutp->len);
5980         if (res->layoutp->len > recvd) {
5981                 dprintk("NFS: server cheating in layoutget reply: "
5982                                 "layout len %u > recvd %u\n",
5983                                 res->layoutp->len, recvd);
5984                 return -EINVAL;
5985         }
5986
5987         if (layout_count > 1) {
5988                 /* We only handle a length one array at the moment.  Any
5989                  * further entries are just ignored.  Note that this means
5990                  * the client may see a response that is less than the
5991                  * minimum it requested.
5992                  */
5993                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5994                         __func__, layout_count);
5995         }
5996
5997         return 0;
5998 out_overflow:
5999         print_overflow_msg(__func__, xdr);
6000         return -EIO;
6001 }
6002
6003 static int decode_layoutreturn(struct xdr_stream *xdr,
6004                                struct nfs4_layoutreturn_res *res)
6005 {
6006         __be32 *p;
6007         int status;
6008
6009         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6010         if (status)
6011                 return status;
6012         p = xdr_inline_decode(xdr, 4);
6013         if (unlikely(!p))
6014                 goto out_overflow;
6015         res->lrs_present = be32_to_cpup(p);
6016         if (res->lrs_present)
6017                 status = decode_layout_stateid(xdr, &res->stateid);
6018         return status;
6019 out_overflow:
6020         print_overflow_msg(__func__, xdr);
6021         return -EIO;
6022 }
6023
6024 static int decode_layoutcommit(struct xdr_stream *xdr,
6025                                struct rpc_rqst *req,
6026                                struct nfs4_layoutcommit_res *res)
6027 {
6028         __be32 *p;
6029         __u32 sizechanged;
6030         int status;
6031
6032         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6033         res->status = status;
6034         if (status)
6035                 return status;
6036
6037         p = xdr_inline_decode(xdr, 4);
6038         if (unlikely(!p))
6039                 goto out_overflow;
6040         sizechanged = be32_to_cpup(p);
6041
6042         if (sizechanged) {
6043                 /* throw away new size */
6044                 p = xdr_inline_decode(xdr, 8);
6045                 if (unlikely(!p))
6046                         goto out_overflow;
6047         }
6048         return 0;
6049 out_overflow:
6050         print_overflow_msg(__func__, xdr);
6051         return -EIO;
6052 }
6053
6054 static int decode_test_stateid(struct xdr_stream *xdr,
6055                                struct nfs41_test_stateid_res *res)
6056 {
6057         __be32 *p;
6058         int status;
6059         int num_res;
6060
6061         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6062         if (status)
6063                 return status;
6064
6065         p = xdr_inline_decode(xdr, 4);
6066         if (unlikely(!p))
6067                 goto out_overflow;
6068         num_res = be32_to_cpup(p++);
6069         if (num_res != 1)
6070                 goto out;
6071
6072         p = xdr_inline_decode(xdr, 4);
6073         if (unlikely(!p))
6074                 goto out_overflow;
6075         res->status = be32_to_cpup(p++);
6076
6077         return status;
6078 out_overflow:
6079         print_overflow_msg(__func__, xdr);
6080 out:
6081         return -EIO;
6082 }
6083
6084 static int decode_free_stateid(struct xdr_stream *xdr,
6085                                struct nfs41_free_stateid_res *res)
6086 {
6087         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6088         return res->status;
6089 }
6090 #endif /* CONFIG_NFS_V4_1 */
6091
6092 /*
6093  * END OF "GENERIC" DECODE ROUTINES.
6094  */
6095
6096 /*
6097  * Decode OPEN_DOWNGRADE response
6098  */
6099 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6100                                        struct xdr_stream *xdr,
6101                                        struct nfs_closeres *res)
6102 {
6103         struct compound_hdr hdr;
6104         int status;
6105
6106         status = decode_compound_hdr(xdr, &hdr);
6107         if (status)
6108                 goto out;
6109         status = decode_sequence(xdr, &res->seq_res, rqstp);
6110         if (status)
6111                 goto out;
6112         status = decode_putfh(xdr);
6113         if (status)
6114                 goto out;
6115         status = decode_open_downgrade(xdr, res);
6116         if (status != 0)
6117                 goto out;
6118         decode_getfattr(xdr, res->fattr, res->server);
6119 out:
6120         return status;
6121 }
6122
6123 /*
6124  * Decode ACCESS response
6125  */
6126 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6127                                struct nfs4_accessres *res)
6128 {
6129         struct compound_hdr hdr;
6130         int status;
6131
6132         status = decode_compound_hdr(xdr, &hdr);
6133         if (status)
6134                 goto out;
6135         status = decode_sequence(xdr, &res->seq_res, rqstp);
6136         if (status)
6137                 goto out;
6138         status = decode_putfh(xdr);
6139         if (status != 0)
6140                 goto out;
6141         status = decode_access(xdr, &res->supported, &res->access);
6142         if (status != 0)
6143                 goto out;
6144         decode_getfattr(xdr, res->fattr, res->server);
6145 out:
6146         return status;
6147 }
6148
6149 /*
6150  * Decode LOOKUP response
6151  */
6152 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6153                                struct nfs4_lookup_res *res)
6154 {
6155         struct compound_hdr hdr;
6156         int status;
6157
6158         status = decode_compound_hdr(xdr, &hdr);
6159         if (status)
6160                 goto out;
6161         status = decode_sequence(xdr, &res->seq_res, rqstp);
6162         if (status)
6163                 goto out;
6164         status = decode_putfh(xdr);
6165         if (status)
6166                 goto out;
6167         status = decode_lookup(xdr);
6168         if (status)
6169                 goto out;
6170         status = decode_getfh(xdr, res->fh);
6171         if (status)
6172                 goto out;
6173         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6174 out:
6175         return status;
6176 }
6177
6178 /*
6179  * Decode LOOKUP_ROOT response
6180  */
6181 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6182                                     struct xdr_stream *xdr,
6183                                     struct nfs4_lookup_res *res)
6184 {
6185         struct compound_hdr hdr;
6186         int status;
6187
6188         status = decode_compound_hdr(xdr, &hdr);
6189         if (status)
6190                 goto out;
6191         status = decode_sequence(xdr, &res->seq_res, rqstp);
6192         if (status)
6193                 goto out;
6194         status = decode_putrootfh(xdr);
6195         if (status)
6196                 goto out;
6197         status = decode_getfh(xdr, res->fh);
6198         if (status == 0)
6199                 status = decode_getfattr_label(xdr, res->fattr,
6200                                                 res->label, res->server);
6201 out:
6202         return status;
6203 }
6204
6205 /*
6206  * Decode REMOVE response
6207  */
6208 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6209                                struct nfs_removeres *res)
6210 {
6211         struct compound_hdr hdr;
6212         int status;
6213
6214         status = decode_compound_hdr(xdr, &hdr);
6215         if (status)
6216                 goto out;
6217         status = decode_sequence(xdr, &res->seq_res, rqstp);
6218         if (status)
6219                 goto out;
6220         status = decode_putfh(xdr);
6221         if (status)
6222                 goto out;
6223         status = decode_remove(xdr, &res->cinfo);
6224 out:
6225         return status;
6226 }
6227
6228 /*
6229  * Decode RENAME response
6230  */
6231 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6232                                struct nfs_renameres *res)
6233 {
6234         struct compound_hdr hdr;
6235         int status;
6236
6237         status = decode_compound_hdr(xdr, &hdr);
6238         if (status)
6239                 goto out;
6240         status = decode_sequence(xdr, &res->seq_res, rqstp);
6241         if (status)
6242                 goto out;
6243         status = decode_putfh(xdr);
6244         if (status)
6245                 goto out;
6246         status = decode_savefh(xdr);
6247         if (status)
6248                 goto out;
6249         status = decode_putfh(xdr);
6250         if (status)
6251                 goto out;
6252         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6253 out:
6254         return status;
6255 }
6256
6257 /*
6258  * Decode LINK response
6259  */
6260 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261                              struct nfs4_link_res *res)
6262 {
6263         struct compound_hdr hdr;
6264         int status;
6265
6266         status = decode_compound_hdr(xdr, &hdr);
6267         if (status)
6268                 goto out;
6269         status = decode_sequence(xdr, &res->seq_res, rqstp);
6270         if (status)
6271                 goto out;
6272         status = decode_putfh(xdr);
6273         if (status)
6274                 goto out;
6275         status = decode_savefh(xdr);
6276         if (status)
6277                 goto out;
6278         status = decode_putfh(xdr);
6279         if (status)
6280                 goto out;
6281         status = decode_link(xdr, &res->cinfo);
6282         if (status)
6283                 goto out;
6284         /*
6285          * Note order: OP_LINK leaves the directory as the current
6286          *             filehandle.
6287          */
6288         status = decode_restorefh(xdr);
6289         if (status)
6290                 goto out;
6291         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6292 out:
6293         return status;
6294 }
6295
6296 /*
6297  * Decode CREATE response
6298  */
6299 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300                                struct nfs4_create_res *res)
6301 {
6302         struct compound_hdr hdr;
6303         int status;
6304
6305         status = decode_compound_hdr(xdr, &hdr);
6306         if (status)
6307                 goto out;
6308         status = decode_sequence(xdr, &res->seq_res, rqstp);
6309         if (status)
6310                 goto out;
6311         status = decode_putfh(xdr);
6312         if (status)
6313                 goto out;
6314         status = decode_create(xdr, &res->dir_cinfo);
6315         if (status)
6316                 goto out;
6317         status = decode_getfh(xdr, res->fh);
6318         if (status)
6319                 goto out;
6320         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6321 out:
6322         return status;
6323 }
6324
6325 /*
6326  * Decode SYMLINK response
6327  */
6328 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329                                 struct nfs4_create_res *res)
6330 {
6331         return nfs4_xdr_dec_create(rqstp, xdr, res);
6332 }
6333
6334 /*
6335  * Decode GETATTR response
6336  */
6337 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6338                                 struct nfs4_getattr_res *res)
6339 {
6340         struct compound_hdr hdr;
6341         int status;
6342
6343         status = decode_compound_hdr(xdr, &hdr);
6344         if (status)
6345                 goto out;
6346         status = decode_sequence(xdr, &res->seq_res, rqstp);
6347         if (status)
6348                 goto out;
6349         status = decode_putfh(xdr);
6350         if (status)
6351                 goto out;
6352         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6353 out:
6354         return status;
6355 }
6356
6357 /*
6358  * Encode an SETACL request
6359  */
6360 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6361                                 struct nfs_setaclargs *args)
6362 {
6363         struct compound_hdr hdr = {
6364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6365         };
6366
6367         encode_compound_hdr(xdr, req, &hdr);
6368         encode_sequence(xdr, &args->seq_args, &hdr);
6369         encode_putfh(xdr, args->fh, &hdr);
6370         encode_setacl(xdr, args, &hdr);
6371         encode_nops(&hdr);
6372 }
6373
6374 /*
6375  * Decode SETACL response
6376  */
6377 static int
6378 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379                     struct nfs_setaclres *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_setattr(xdr);
6394 out:
6395         return status;
6396 }
6397
6398 /*
6399  * Decode GETACL response
6400  */
6401 static int
6402 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6403                     struct nfs_getaclres *res)
6404 {
6405         struct compound_hdr hdr;
6406         int status;
6407
6408         if (res->acl_scratch != NULL) {
6409                 void *p = page_address(res->acl_scratch);
6410                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6411         }
6412         status = decode_compound_hdr(xdr, &hdr);
6413         if (status)
6414                 goto out;
6415         status = decode_sequence(xdr, &res->seq_res, rqstp);
6416         if (status)
6417                 goto out;
6418         status = decode_putfh(xdr);
6419         if (status)
6420                 goto out;
6421         status = decode_getacl(xdr, rqstp, res);
6422
6423 out:
6424         return status;
6425 }
6426
6427 /*
6428  * Decode CLOSE response
6429  */
6430 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431                               struct nfs_closeres *res)
6432 {
6433         struct compound_hdr hdr;
6434         int status;
6435
6436         status = decode_compound_hdr(xdr, &hdr);
6437         if (status)
6438                 goto out;
6439         status = decode_sequence(xdr, &res->seq_res, rqstp);
6440         if (status)
6441                 goto out;
6442         status = decode_putfh(xdr);
6443         if (status)
6444                 goto out;
6445         status = decode_close(xdr, res);
6446         if (status != 0)
6447                 goto out;
6448         /*
6449          * Note: Server may do delete on close for this file
6450          *      in which case the getattr call will fail with
6451          *      an ESTALE error. Shouldn't be a problem,
6452          *      though, since fattr->valid will remain unset.
6453          */
6454         decode_getfattr(xdr, res->fattr, res->server);
6455 out:
6456         return status;
6457 }
6458
6459 /*
6460  * Decode OPEN response
6461  */
6462 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6463                              struct nfs_openres *res)
6464 {
6465         struct compound_hdr hdr;
6466         int status;
6467
6468         status = decode_compound_hdr(xdr, &hdr);
6469         if (status)
6470                 goto out;
6471         status = decode_sequence(xdr, &res->seq_res, rqstp);
6472         if (status)
6473                 goto out;
6474         status = decode_putfh(xdr);
6475         if (status)
6476                 goto out;
6477         status = decode_open(xdr, res);
6478         if (status)
6479                 goto out;
6480         status = decode_getfh(xdr, &res->fh);
6481         if (status)
6482                 goto out;
6483         if (res->access_request)
6484                 decode_access(xdr, &res->access_supported, &res->access_result);
6485         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6486 out:
6487         return status;
6488 }
6489
6490 /*
6491  * Decode OPEN_CONFIRM response
6492  */
6493 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6494                                      struct xdr_stream *xdr,
6495                                      struct nfs_open_confirmres *res)
6496 {
6497         struct compound_hdr hdr;
6498         int status;
6499
6500         status = decode_compound_hdr(xdr, &hdr);
6501         if (status)
6502                 goto out;
6503         status = decode_putfh(xdr);
6504         if (status)
6505                 goto out;
6506         status = decode_open_confirm(xdr, res);
6507 out:
6508         return status;
6509 }
6510
6511 /*
6512  * Decode OPEN response
6513  */
6514 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6515                                     struct xdr_stream *xdr,
6516                                     struct nfs_openres *res)
6517 {
6518         struct compound_hdr hdr;
6519         int status;
6520
6521         status = decode_compound_hdr(xdr, &hdr);
6522         if (status)
6523                 goto out;
6524         status = decode_sequence(xdr, &res->seq_res, rqstp);
6525         if (status)
6526                 goto out;
6527         status = decode_putfh(xdr);
6528         if (status)
6529                 goto out;
6530         status = decode_open(xdr, res);
6531         if (status)
6532                 goto out;
6533         if (res->access_request)
6534                 decode_access(xdr, &res->access_supported, &res->access_result);
6535         decode_getfattr(xdr, res->f_attr, res->server);
6536 out:
6537         return status;
6538 }
6539
6540 /*
6541  * Decode SETATTR response
6542  */
6543 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6544                                 struct xdr_stream *xdr,
6545                                 struct nfs_setattrres *res)
6546 {
6547         struct compound_hdr hdr;
6548         int status;
6549
6550         status = decode_compound_hdr(xdr, &hdr);
6551         if (status)
6552                 goto out;
6553         status = decode_sequence(xdr, &res->seq_res, rqstp);
6554         if (status)
6555                 goto out;
6556         status = decode_putfh(xdr);
6557         if (status)
6558                 goto out;
6559         status = decode_setattr(xdr);
6560         if (status)
6561                 goto out;
6562         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6563 out:
6564         return status;
6565 }
6566
6567 /*
6568  * Decode LOCK response
6569  */
6570 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6571                              struct nfs_lock_res *res)
6572 {
6573         struct compound_hdr hdr;
6574         int status;
6575
6576         status = decode_compound_hdr(xdr, &hdr);
6577         if (status)
6578                 goto out;
6579         status = decode_sequence(xdr, &res->seq_res, rqstp);
6580         if (status)
6581                 goto out;
6582         status = decode_putfh(xdr);
6583         if (status)
6584                 goto out;
6585         status = decode_lock(xdr, res);
6586 out:
6587         return status;
6588 }
6589
6590 /*
6591  * Decode LOCKT response
6592  */
6593 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6594                               struct nfs_lockt_res *res)
6595 {
6596         struct compound_hdr hdr;
6597         int status;
6598
6599         status = decode_compound_hdr(xdr, &hdr);
6600         if (status)
6601                 goto out;
6602         status = decode_sequence(xdr, &res->seq_res, rqstp);
6603         if (status)
6604                 goto out;
6605         status = decode_putfh(xdr);
6606         if (status)
6607                 goto out;
6608         status = decode_lockt(xdr, res);
6609 out:
6610         return status;
6611 }
6612
6613 /*
6614  * Decode LOCKU response
6615  */
6616 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6617                               struct nfs_locku_res *res)
6618 {
6619         struct compound_hdr hdr;
6620         int status;
6621
6622         status = decode_compound_hdr(xdr, &hdr);
6623         if (status)
6624                 goto out;
6625         status = decode_sequence(xdr, &res->seq_res, rqstp);
6626         if (status)
6627                 goto out;
6628         status = decode_putfh(xdr);
6629         if (status)
6630                 goto out;
6631         status = decode_locku(xdr, res);
6632 out:
6633         return status;
6634 }
6635
6636 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6637                                           struct xdr_stream *xdr, void *dummy)
6638 {
6639         struct compound_hdr hdr;
6640         int status;
6641
6642         status = decode_compound_hdr(xdr, &hdr);
6643         if (!status)
6644                 status = decode_release_lockowner(xdr);
6645         return status;
6646 }
6647
6648 /*
6649  * Decode READLINK response
6650  */
6651 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6652                                  struct xdr_stream *xdr,
6653                                  struct nfs4_readlink_res *res)
6654 {
6655         struct compound_hdr hdr;
6656         int status;
6657
6658         status = decode_compound_hdr(xdr, &hdr);
6659         if (status)
6660                 goto out;
6661         status = decode_sequence(xdr, &res->seq_res, rqstp);
6662         if (status)
6663                 goto out;
6664         status = decode_putfh(xdr);
6665         if (status)
6666                 goto out;
6667         status = decode_readlink(xdr, rqstp);
6668 out:
6669         return status;
6670 }
6671
6672 /*
6673  * Decode READDIR response
6674  */
6675 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6676                                 struct nfs4_readdir_res *res)
6677 {
6678         struct compound_hdr hdr;
6679         int status;
6680
6681         status = decode_compound_hdr(xdr, &hdr);
6682         if (status)
6683                 goto out;
6684         status = decode_sequence(xdr, &res->seq_res, rqstp);
6685         if (status)
6686                 goto out;
6687         status = decode_putfh(xdr);
6688         if (status)
6689                 goto out;
6690         status = decode_readdir(xdr, rqstp, res);
6691 out:
6692         return status;
6693 }
6694
6695 /*
6696  * Decode Read response
6697  */
6698 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6699                              struct nfs_pgio_res *res)
6700 {
6701         struct compound_hdr hdr;
6702         int status;
6703
6704         status = decode_compound_hdr(xdr, &hdr);
6705         res->op_status = hdr.status;
6706         if (status)
6707                 goto out;
6708         status = decode_sequence(xdr, &res->seq_res, rqstp);
6709         if (status)
6710                 goto out;
6711         status = decode_putfh(xdr);
6712         if (status)
6713                 goto out;
6714         status = decode_read(xdr, rqstp, res);
6715         if (!status)
6716                 status = res->count;
6717 out:
6718         return status;
6719 }
6720
6721 /*
6722  * Decode WRITE response
6723  */
6724 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725                               struct nfs_pgio_res *res)
6726 {
6727         struct compound_hdr hdr;
6728         int status;
6729
6730         status = decode_compound_hdr(xdr, &hdr);
6731         res->op_status = hdr.status;
6732         if (status)
6733                 goto out;
6734         status = decode_sequence(xdr, &res->seq_res, rqstp);
6735         if (status)
6736                 goto out;
6737         status = decode_putfh(xdr);
6738         if (status)
6739                 goto out;
6740         status = decode_write(xdr, res);
6741         if (status)
6742                 goto out;
6743         if (res->fattr)
6744                 decode_getfattr(xdr, res->fattr, res->server);
6745         if (!status)
6746                 status = res->count;
6747 out:
6748         return status;
6749 }
6750
6751 /*
6752  * Decode COMMIT response
6753  */
6754 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6755                                struct nfs_commitres *res)
6756 {
6757         struct compound_hdr hdr;
6758         int status;
6759
6760         status = decode_compound_hdr(xdr, &hdr);
6761         res->op_status = hdr.status;
6762         if (status)
6763                 goto out;
6764         status = decode_sequence(xdr, &res->seq_res, rqstp);
6765         if (status)
6766                 goto out;
6767         status = decode_putfh(xdr);
6768         if (status)
6769                 goto out;
6770         status = decode_commit(xdr, res);
6771 out:
6772         return status;
6773 }
6774
6775 /*
6776  * Decode FSINFO response
6777  */
6778 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6779                                struct nfs4_fsinfo_res *res)
6780 {
6781         struct compound_hdr hdr;
6782         int status;
6783
6784         status = decode_compound_hdr(xdr, &hdr);
6785         if (!status)
6786                 status = decode_sequence(xdr, &res->seq_res, req);
6787         if (!status)
6788                 status = decode_putfh(xdr);
6789         if (!status)
6790                 status = decode_fsinfo(xdr, res->fsinfo);
6791         return status;
6792 }
6793
6794 /*
6795  * Decode PATHCONF response
6796  */
6797 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6798                                  struct nfs4_pathconf_res *res)
6799 {
6800         struct compound_hdr hdr;
6801         int status;
6802
6803         status = decode_compound_hdr(xdr, &hdr);
6804         if (!status)
6805                 status = decode_sequence(xdr, &res->seq_res, req);
6806         if (!status)
6807                 status = decode_putfh(xdr);
6808         if (!status)
6809                 status = decode_pathconf(xdr, res->pathconf);
6810         return status;
6811 }
6812
6813 /*
6814  * Decode STATFS response
6815  */
6816 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6817                                struct nfs4_statfs_res *res)
6818 {
6819         struct compound_hdr hdr;
6820         int status;
6821
6822         status = decode_compound_hdr(xdr, &hdr);
6823         if (!status)
6824                 status = decode_sequence(xdr, &res->seq_res, req);
6825         if (!status)
6826                 status = decode_putfh(xdr);
6827         if (!status)
6828                 status = decode_statfs(xdr, res->fsstat);
6829         return status;
6830 }
6831
6832 /*
6833  * Decode GETATTR_BITMAP response
6834  */
6835 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6836                                     struct xdr_stream *xdr,
6837                                     struct nfs4_server_caps_res *res)
6838 {
6839         struct compound_hdr hdr;
6840         int status;
6841
6842         status = decode_compound_hdr(xdr, &hdr);
6843         if (status)
6844                 goto out;
6845         status = decode_sequence(xdr, &res->seq_res, req);
6846         if (status)
6847                 goto out;
6848         status = decode_putfh(xdr);
6849         if (status)
6850                 goto out;
6851         status = decode_server_caps(xdr, res);
6852 out:
6853         return status;
6854 }
6855
6856 /*
6857  * Decode RENEW response
6858  */
6859 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6860                               void *__unused)
6861 {
6862         struct compound_hdr hdr;
6863         int status;
6864
6865         status = decode_compound_hdr(xdr, &hdr);
6866         if (!status)
6867                 status = decode_renew(xdr);
6868         return status;
6869 }
6870
6871 /*
6872  * Decode SETCLIENTID response
6873  */
6874 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6875                                     struct xdr_stream *xdr,
6876                                     struct nfs4_setclientid_res *res)
6877 {
6878         struct compound_hdr hdr;
6879         int status;
6880
6881         status = decode_compound_hdr(xdr, &hdr);
6882         if (!status)
6883                 status = decode_setclientid(xdr, res);
6884         return status;
6885 }
6886
6887 /*
6888  * Decode SETCLIENTID_CONFIRM response
6889  */
6890 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6891                                             struct xdr_stream *xdr)
6892 {
6893         struct compound_hdr hdr;
6894         int status;
6895
6896         status = decode_compound_hdr(xdr, &hdr);
6897         if (!status)
6898                 status = decode_setclientid_confirm(xdr);
6899         return status;
6900 }
6901
6902 /*
6903  * Decode DELEGRETURN response
6904  */
6905 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6906                                     struct xdr_stream *xdr,
6907                                     struct nfs4_delegreturnres *res)
6908 {
6909         struct compound_hdr hdr;
6910         int status;
6911
6912         status = decode_compound_hdr(xdr, &hdr);
6913         if (status)
6914                 goto out;
6915         status = decode_sequence(xdr, &res->seq_res, rqstp);
6916         if (status)
6917                 goto out;
6918         status = decode_putfh(xdr);
6919         if (status != 0)
6920                 goto out;
6921         status = decode_getfattr(xdr, res->fattr, res->server);
6922         if (status != 0)
6923                 goto out;
6924         status = decode_delegreturn(xdr);
6925 out:
6926         return status;
6927 }
6928
6929 /*
6930  * Decode FS_LOCATIONS response
6931  */
6932 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6933                                      struct xdr_stream *xdr,
6934                                      struct nfs4_fs_locations_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, req);
6943         if (status)
6944                 goto out;
6945         status = decode_putfh(xdr);
6946         if (status)
6947                 goto out;
6948         if (res->migration) {
6949                 xdr_enter_page(xdr, PAGE_SIZE);
6950                 status = decode_getfattr_generic(xdr,
6951                                         &res->fs_locations->fattr,
6952                                          NULL, res->fs_locations,
6953                                          NULL, res->fs_locations->server);
6954                 if (status)
6955                         goto out;
6956                 if (res->renew)
6957                         status = decode_renew(xdr);
6958         } else {
6959                 status = decode_lookup(xdr);
6960                 if (status)
6961                         goto out;
6962                 xdr_enter_page(xdr, PAGE_SIZE);
6963                 status = decode_getfattr_generic(xdr,
6964                                         &res->fs_locations->fattr,
6965                                          NULL, res->fs_locations,
6966                                          NULL, res->fs_locations->server);
6967         }
6968 out:
6969         return status;
6970 }
6971
6972 /*
6973  * Decode SECINFO response
6974  */
6975 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6976                                 struct xdr_stream *xdr,
6977                                 struct nfs4_secinfo_res *res)
6978 {
6979         struct compound_hdr hdr;
6980         int status;
6981
6982         status = decode_compound_hdr(xdr, &hdr);
6983         if (status)
6984                 goto out;
6985         status = decode_sequence(xdr, &res->seq_res, rqstp);
6986         if (status)
6987                 goto out;
6988         status = decode_putfh(xdr);
6989         if (status)
6990                 goto out;
6991         status = decode_secinfo(xdr, res);
6992 out:
6993         return status;
6994 }
6995
6996 /*
6997  * Decode FSID_PRESENT response
6998  */
6999 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7000                                      struct xdr_stream *xdr,
7001                                      struct nfs4_fsid_present_res *res)
7002 {
7003         struct compound_hdr hdr;
7004         int status;
7005
7006         status = decode_compound_hdr(xdr, &hdr);
7007         if (status)
7008                 goto out;
7009         status = decode_sequence(xdr, &res->seq_res, rqstp);
7010         if (status)
7011                 goto out;
7012         status = decode_putfh(xdr);
7013         if (status)
7014                 goto out;
7015         status = decode_getfh(xdr, res->fh);
7016         if (status)
7017                 goto out;
7018         if (res->renew)
7019                 status = decode_renew(xdr);
7020 out:
7021         return status;
7022 }
7023
7024 #if defined(CONFIG_NFS_V4_1)
7025 /*
7026  * Decode BIND_CONN_TO_SESSION response
7027  */
7028 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7029                                         struct xdr_stream *xdr,
7030                                         void *res)
7031 {
7032         struct compound_hdr hdr;
7033         int status;
7034
7035         status = decode_compound_hdr(xdr, &hdr);
7036         if (!status)
7037                 status = decode_bind_conn_to_session(xdr, res);
7038         return status;
7039 }
7040
7041 /*
7042  * Decode EXCHANGE_ID response
7043  */
7044 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7045                                     struct xdr_stream *xdr,
7046                                     void *res)
7047 {
7048         struct compound_hdr hdr;
7049         int status;
7050
7051         status = decode_compound_hdr(xdr, &hdr);
7052         if (!status)
7053                 status = decode_exchange_id(xdr, res);
7054         return status;
7055 }
7056
7057 /*
7058  * Decode CREATE_SESSION response
7059  */
7060 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7061                                        struct xdr_stream *xdr,
7062                                        struct nfs41_create_session_res *res)
7063 {
7064         struct compound_hdr hdr;
7065         int status;
7066
7067         status = decode_compound_hdr(xdr, &hdr);
7068         if (!status)
7069                 status = decode_create_session(xdr, res);
7070         return status;
7071 }
7072
7073 /*
7074  * Decode DESTROY_SESSION response
7075  */
7076 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7077                                         struct xdr_stream *xdr,
7078                                         void *res)
7079 {
7080         struct compound_hdr hdr;
7081         int status;
7082
7083         status = decode_compound_hdr(xdr, &hdr);
7084         if (!status)
7085                 status = decode_destroy_session(xdr, res);
7086         return status;
7087 }
7088
7089 /*
7090  * Decode DESTROY_CLIENTID response
7091  */
7092 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7093                                         struct xdr_stream *xdr,
7094                                         void *res)
7095 {
7096         struct compound_hdr hdr;
7097         int status;
7098
7099         status = decode_compound_hdr(xdr, &hdr);
7100         if (!status)
7101                 status = decode_destroy_clientid(xdr, res);
7102         return status;
7103 }
7104
7105 /*
7106  * Decode SEQUENCE response
7107  */
7108 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7109                                  struct xdr_stream *xdr,
7110                                  struct nfs4_sequence_res *res)
7111 {
7112         struct compound_hdr hdr;
7113         int status;
7114
7115         status = decode_compound_hdr(xdr, &hdr);
7116         if (!status)
7117                 status = decode_sequence(xdr, res, rqstp);
7118         return status;
7119 }
7120
7121 /*
7122  * Decode GET_LEASE_TIME response
7123  */
7124 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7125                                        struct xdr_stream *xdr,
7126                                        struct nfs4_get_lease_time_res *res)
7127 {
7128         struct compound_hdr hdr;
7129         int status;
7130
7131         status = decode_compound_hdr(xdr, &hdr);
7132         if (!status)
7133                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7134         if (!status)
7135                 status = decode_putrootfh(xdr);
7136         if (!status)
7137                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7138         return status;
7139 }
7140
7141 /*
7142  * Decode RECLAIM_COMPLETE response
7143  */
7144 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7145                                          struct xdr_stream *xdr,
7146                                          struct nfs41_reclaim_complete_res *res)
7147 {
7148         struct compound_hdr hdr;
7149         int status;
7150
7151         status = decode_compound_hdr(xdr, &hdr);
7152         if (!status)
7153                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7154         if (!status)
7155                 status = decode_reclaim_complete(xdr, NULL);
7156         return status;
7157 }
7158
7159 /*
7160  * Decode GETDEVINFO response
7161  */
7162 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7163                                       struct xdr_stream *xdr,
7164                                       struct nfs4_getdeviceinfo_res *res)
7165 {
7166         struct compound_hdr hdr;
7167         int status;
7168
7169         status = decode_compound_hdr(xdr, &hdr);
7170         if (status != 0)
7171                 goto out;
7172         status = decode_sequence(xdr, &res->seq_res, rqstp);
7173         if (status != 0)
7174                 goto out;
7175         status = decode_getdeviceinfo(xdr, res);
7176 out:
7177         return status;
7178 }
7179
7180 /*
7181  * Decode LAYOUTGET response
7182  */
7183 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7184                                   struct xdr_stream *xdr,
7185                                   struct nfs4_layoutget_res *res)
7186 {
7187         struct compound_hdr hdr;
7188         int status;
7189
7190         status = decode_compound_hdr(xdr, &hdr);
7191         if (status)
7192                 goto out;
7193         status = decode_sequence(xdr, &res->seq_res, rqstp);
7194         if (status)
7195                 goto out;
7196         status = decode_putfh(xdr);
7197         if (status)
7198                 goto out;
7199         status = decode_layoutget(xdr, rqstp, res);
7200 out:
7201         return status;
7202 }
7203
7204 /*
7205  * Decode LAYOUTRETURN response
7206  */
7207 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7208                                      struct xdr_stream *xdr,
7209                                      struct nfs4_layoutreturn_res *res)
7210 {
7211         struct compound_hdr hdr;
7212         int status;
7213
7214         status = decode_compound_hdr(xdr, &hdr);
7215         if (status)
7216                 goto out;
7217         status = decode_sequence(xdr, &res->seq_res, rqstp);
7218         if (status)
7219                 goto out;
7220         status = decode_putfh(xdr);
7221         if (status)
7222                 goto out;
7223         status = decode_layoutreturn(xdr, res);
7224 out:
7225         return status;
7226 }
7227
7228 /*
7229  * Decode LAYOUTCOMMIT response
7230  */
7231 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7232                                      struct xdr_stream *xdr,
7233                                      struct nfs4_layoutcommit_res *res)
7234 {
7235         struct compound_hdr hdr;
7236         int status;
7237
7238         status = decode_compound_hdr(xdr, &hdr);
7239         if (status)
7240                 goto out;
7241         status = decode_sequence(xdr, &res->seq_res, rqstp);
7242         if (status)
7243                 goto out;
7244         status = decode_putfh(xdr);
7245         if (status)
7246                 goto out;
7247         status = decode_layoutcommit(xdr, rqstp, res);
7248         if (status)
7249                 goto out;
7250         decode_getfattr(xdr, res->fattr, res->server);
7251 out:
7252         return status;
7253 }
7254
7255 /*
7256  * Decode SECINFO_NO_NAME response
7257  */
7258 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7259                                         struct xdr_stream *xdr,
7260                                         struct nfs4_secinfo_res *res)
7261 {
7262         struct compound_hdr hdr;
7263         int status;
7264
7265         status = decode_compound_hdr(xdr, &hdr);
7266         if (status)
7267                 goto out;
7268         status = decode_sequence(xdr, &res->seq_res, rqstp);
7269         if (status)
7270                 goto out;
7271         status = decode_putrootfh(xdr);
7272         if (status)
7273                 goto out;
7274         status = decode_secinfo_no_name(xdr, res);
7275 out:
7276         return status;
7277 }
7278
7279 /*
7280  * Decode TEST_STATEID response
7281  */
7282 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7283                                      struct xdr_stream *xdr,
7284                                      struct nfs41_test_stateid_res *res)
7285 {
7286         struct compound_hdr hdr;
7287         int status;
7288
7289         status = decode_compound_hdr(xdr, &hdr);
7290         if (status)
7291                 goto out;
7292         status = decode_sequence(xdr, &res->seq_res, rqstp);
7293         if (status)
7294                 goto out;
7295         status = decode_test_stateid(xdr, res);
7296 out:
7297         return status;
7298 }
7299
7300 /*
7301  * Decode FREE_STATEID response
7302  */
7303 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7304                                      struct xdr_stream *xdr,
7305                                      struct nfs41_free_stateid_res *res)
7306 {
7307         struct compound_hdr hdr;
7308         int status;
7309
7310         status = decode_compound_hdr(xdr, &hdr);
7311         if (status)
7312                 goto out;
7313         status = decode_sequence(xdr, &res->seq_res, rqstp);
7314         if (status)
7315                 goto out;
7316         status = decode_free_stateid(xdr, res);
7317 out:
7318         return status;
7319 }
7320 #endif /* CONFIG_NFS_V4_1 */
7321
7322 /**
7323  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7324  *                      the local page cache.
7325  * @xdr: XDR stream where entry resides
7326  * @entry: buffer to fill in with entry data
7327  * @plus: boolean indicating whether this should be a readdirplus entry
7328  *
7329  * Returns zero if successful, otherwise a negative errno value is
7330  * returned.
7331  *
7332  * This function is not invoked during READDIR reply decoding, but
7333  * rather whenever an application invokes the getdents(2) system call
7334  * on a directory already in our cache.
7335  */
7336 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7337                        int plus)
7338 {
7339         unsigned int savep;
7340         uint32_t bitmap[3] = {0};
7341         uint32_t len;
7342         __be32 *p = xdr_inline_decode(xdr, 4);
7343         if (unlikely(!p))
7344                 goto out_overflow;
7345         if (*p == xdr_zero) {
7346                 p = xdr_inline_decode(xdr, 4);
7347                 if (unlikely(!p))
7348                         goto out_overflow;
7349                 if (*p == xdr_zero)
7350                         return -EAGAIN;
7351                 entry->eof = 1;
7352                 return -EBADCOOKIE;
7353         }
7354
7355         p = xdr_inline_decode(xdr, 12);
7356         if (unlikely(!p))
7357                 goto out_overflow;
7358         entry->prev_cookie = entry->cookie;
7359         p = xdr_decode_hyper(p, &entry->cookie);
7360         entry->len = be32_to_cpup(p);
7361
7362         p = xdr_inline_decode(xdr, entry->len);
7363         if (unlikely(!p))
7364                 goto out_overflow;
7365         entry->name = (const char *) p;
7366
7367         /*
7368          * In case the server doesn't return an inode number,
7369          * we fake one here.  (We don't use inode number 0,
7370          * since glibc seems to choke on it...)
7371          */
7372         entry->ino = 1;
7373         entry->fattr->valid = 0;
7374
7375         if (decode_attr_bitmap(xdr, bitmap) < 0)
7376                 goto out_overflow;
7377
7378         if (decode_attr_length(xdr, &len, &savep) < 0)
7379                 goto out_overflow;
7380
7381         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7382                         NULL, entry->label, entry->server) < 0)
7383                 goto out_overflow;
7384         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7385                 entry->ino = entry->fattr->mounted_on_fileid;
7386         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7387                 entry->ino = entry->fattr->fileid;
7388
7389         entry->d_type = DT_UNKNOWN;
7390         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7391                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7392
7393         return 0;
7394
7395 out_overflow:
7396         print_overflow_msg(__func__, xdr);
7397         return -EAGAIN;
7398 }
7399
7400 /*
7401  * We need to translate between nfs status return values and
7402  * the local errno values which may not be the same.
7403  */
7404 static struct {
7405         int stat;
7406         int errno;
7407 } nfs_errtbl[] = {
7408         { NFS4_OK,              0               },
7409         { NFS4ERR_PERM,         -EPERM          },
7410         { NFS4ERR_NOENT,        -ENOENT         },
7411         { NFS4ERR_IO,           -errno_NFSERR_IO},
7412         { NFS4ERR_NXIO,         -ENXIO          },
7413         { NFS4ERR_ACCESS,       -EACCES         },
7414         { NFS4ERR_EXIST,        -EEXIST         },
7415         { NFS4ERR_XDEV,         -EXDEV          },
7416         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7417         { NFS4ERR_ISDIR,        -EISDIR         },
7418         { NFS4ERR_INVAL,        -EINVAL         },
7419         { NFS4ERR_FBIG,         -EFBIG          },
7420         { NFS4ERR_NOSPC,        -ENOSPC         },
7421         { NFS4ERR_ROFS,         -EROFS          },
7422         { NFS4ERR_MLINK,        -EMLINK         },
7423         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7424         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7425         { NFS4ERR_DQUOT,        -EDQUOT         },
7426         { NFS4ERR_STALE,        -ESTALE         },
7427         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7428         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7429         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7430         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7431         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7432         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7433         { NFS4ERR_LOCKED,       -EAGAIN         },
7434         { NFS4ERR_SYMLINK,      -ELOOP          },
7435         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7436         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7437         { -1,                   -EIO            }
7438 };
7439
7440 /*
7441  * Convert an NFS error code to a local one.
7442  * This one is used jointly by NFSv2 and NFSv3.
7443  */
7444 static int
7445 nfs4_stat_to_errno(int stat)
7446 {
7447         int i;
7448         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7449                 if (nfs_errtbl[i].stat == stat)
7450                         return nfs_errtbl[i].errno;
7451         }
7452         if (stat <= 10000 || stat > 10100) {
7453                 /* The server is looney tunes. */
7454                 return -EREMOTEIO;
7455         }
7456         /* If we cannot translate the error, the recovery routines should
7457          * handle it.
7458          * Note: remaining NFSv4 error codes have values > 10000, so should
7459          * not conflict with native Linux error codes.
7460          */
7461         return -stat;
7462 }
7463
7464 #ifdef CONFIG_NFS_V4_2
7465 #include "nfs42xdr.c"
7466 #endif /* CONFIG_NFS_V4_2 */
7467
7468 #define PROC(proc, argtype, restype)                            \
7469 [NFSPROC4_CLNT_##proc] = {                                      \
7470         .p_proc   = NFSPROC4_COMPOUND,                          \
7471         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7472         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7473         .p_arglen = NFS4_##argtype##_sz,                        \
7474         .p_replen = NFS4_##restype##_sz,                        \
7475         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7476         .p_name   = #proc,                                      \
7477 }
7478
7479 #define STUB(proc)              \
7480 [NFSPROC4_CLNT_##proc] = {      \
7481         .p_name = #proc,        \
7482 }
7483
7484 struct rpc_procinfo     nfs4_procedures[] = {
7485         PROC(READ,              enc_read,               dec_read),
7486         PROC(WRITE,             enc_write,              dec_write),
7487         PROC(COMMIT,            enc_commit,             dec_commit),
7488         PROC(OPEN,              enc_open,               dec_open),
7489         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7490         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7491         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7492         PROC(CLOSE,             enc_close,              dec_close),
7493         PROC(SETATTR,           enc_setattr,            dec_setattr),
7494         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7495         PROC(RENEW,             enc_renew,              dec_renew),
7496         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7497         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7498         PROC(LOCK,              enc_lock,               dec_lock),
7499         PROC(LOCKT,             enc_lockt,              dec_lockt),
7500         PROC(LOCKU,             enc_locku,              dec_locku),
7501         PROC(ACCESS,            enc_access,             dec_access),
7502         PROC(GETATTR,           enc_getattr,            dec_getattr),
7503         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7504         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7505         PROC(REMOVE,            enc_remove,             dec_remove),
7506         PROC(RENAME,            enc_rename,             dec_rename),
7507         PROC(LINK,              enc_link,               dec_link),
7508         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7509         PROC(CREATE,            enc_create,             dec_create),
7510         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7511         PROC(STATFS,            enc_statfs,             dec_statfs),
7512         PROC(READLINK,          enc_readlink,           dec_readlink),
7513         PROC(READDIR,           enc_readdir,            dec_readdir),
7514         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7515         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7516         PROC(GETACL,            enc_getacl,             dec_getacl),
7517         PROC(SETACL,            enc_setacl,             dec_setacl),
7518         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7519         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7520         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7521         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7522 #if defined(CONFIG_NFS_V4_1)
7523         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7524         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7525         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7526         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7527         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7528         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7529         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7530         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7531         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7532         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7533         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7534         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7535         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7536         STUB(GETDEVICELIST),
7537         PROC(BIND_CONN_TO_SESSION,
7538                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7539         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7540 #endif /* CONFIG_NFS_V4_1 */
7541 #ifdef CONFIG_NFS_V4_2
7542         PROC(SEEK,              enc_seek,               dec_seek),
7543         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7544         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7545         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7546         PROC(CLONE,             enc_clone,              dec_clone),
7547         PROC(COPY,              enc_copy,               dec_copy),
7548 #endif /* CONFIG_NFS_V4_2 */
7549 };
7550
7551 const struct rpc_version nfs_version4 = {
7552         .number                 = 4,
7553         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7554         .procs                  = nfs4_procedures
7555 };
7556
7557 /*
7558  * Local variables:
7559  *  c-basic-offset: 8
7560  * End:
7561  */