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         p = reserve_space(xdr, 20);
1989         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1990         p = xdr_encode_hyper(p, args->lastbytewritten);
1991         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1992         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1993
1994         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1995                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1996                         NFS_I(inode)->layout, xdr, args);
1997         } else {
1998                 encode_uint32(xdr, args->layoutupdate_len);
1999                 if (args->layoutupdate_pages) {
2000                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2001                                         args->layoutupdate_len);
2002                 }
2003         }
2004
2005         return 0;
2006 }
2007
2008 static void
2009 encode_layoutreturn(struct xdr_stream *xdr,
2010                     const struct nfs4_layoutreturn_args *args,
2011                     struct compound_hdr *hdr)
2012 {
2013         __be32 *p;
2014
2015         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2016         p = reserve_space(xdr, 16);
2017         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2018         *p++ = cpu_to_be32(args->layout_type);
2019         *p++ = cpu_to_be32(args->range.iomode);
2020         *p = cpu_to_be32(RETURN_FILE);
2021         p = reserve_space(xdr, 16);
2022         p = xdr_encode_hyper(p, args->range.offset);
2023         p = xdr_encode_hyper(p, args->range.length);
2024         spin_lock(&args->inode->i_lock);
2025         encode_nfs4_stateid(xdr, &args->stateid);
2026         spin_unlock(&args->inode->i_lock);
2027         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2028                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2029                         NFS_I(args->inode)->layout, xdr, args);
2030         } else
2031                 encode_uint32(xdr, 0);
2032 }
2033
2034 static int
2035 encode_secinfo_no_name(struct xdr_stream *xdr,
2036                        const struct nfs41_secinfo_no_name_args *args,
2037                        struct compound_hdr *hdr)
2038 {
2039         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2040         encode_uint32(xdr, args->style);
2041         return 0;
2042 }
2043
2044 static void encode_test_stateid(struct xdr_stream *xdr,
2045                                 struct nfs41_test_stateid_args *args,
2046                                 struct compound_hdr *hdr)
2047 {
2048         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2049         encode_uint32(xdr, 1);
2050         encode_nfs4_stateid(xdr, args->stateid);
2051 }
2052
2053 static void encode_free_stateid(struct xdr_stream *xdr,
2054                                 struct nfs41_free_stateid_args *args,
2055                                 struct compound_hdr *hdr)
2056 {
2057         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2058         encode_nfs4_stateid(xdr, &args->stateid);
2059 }
2060 #endif /* CONFIG_NFS_V4_1 */
2061
2062 /*
2063  * END OF "GENERIC" ENCODE ROUTINES.
2064  */
2065
2066 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2067 {
2068 #if defined(CONFIG_NFS_V4_1)
2069         struct nfs4_session *session = args->sa_slot->table->session;
2070         if (session)
2071                 return session->clp->cl_mvops->minor_version;
2072 #endif /* CONFIG_NFS_V4_1 */
2073         return 0;
2074 }
2075
2076 /*
2077  * Encode an ACCESS request
2078  */
2079 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2080                                 const struct nfs4_accessargs *args)
2081 {
2082         struct compound_hdr hdr = {
2083                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2084         };
2085
2086         encode_compound_hdr(xdr, req, &hdr);
2087         encode_sequence(xdr, &args->seq_args, &hdr);
2088         encode_putfh(xdr, args->fh, &hdr);
2089         encode_access(xdr, args->access, &hdr);
2090         encode_getfattr(xdr, args->bitmask, &hdr);
2091         encode_nops(&hdr);
2092 }
2093
2094 /*
2095  * Encode LOOKUP request
2096  */
2097 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2098                                 const struct nfs4_lookup_arg *args)
2099 {
2100         struct compound_hdr hdr = {
2101                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2102         };
2103
2104         encode_compound_hdr(xdr, req, &hdr);
2105         encode_sequence(xdr, &args->seq_args, &hdr);
2106         encode_putfh(xdr, args->dir_fh, &hdr);
2107         encode_lookup(xdr, args->name, &hdr);
2108         encode_getfh(xdr, &hdr);
2109         encode_getfattr(xdr, args->bitmask, &hdr);
2110         encode_nops(&hdr);
2111 }
2112
2113 /*
2114  * Encode LOOKUP_ROOT request
2115  */
2116 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2117                                      struct xdr_stream *xdr,
2118                                      const struct nfs4_lookup_root_arg *args)
2119 {
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         encode_compound_hdr(xdr, req, &hdr);
2125         encode_sequence(xdr, &args->seq_args, &hdr);
2126         encode_putrootfh(xdr, &hdr);
2127         encode_getfh(xdr, &hdr);
2128         encode_getfattr(xdr, args->bitmask, &hdr);
2129         encode_nops(&hdr);
2130 }
2131
2132 /*
2133  * Encode REMOVE request
2134  */
2135 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2136                                 const struct nfs_removeargs *args)
2137 {
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->fh, &hdr);
2145         encode_remove(xdr, &args->name, &hdr);
2146         encode_nops(&hdr);
2147 }
2148
2149 /*
2150  * Encode RENAME request
2151  */
2152 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2153                                 const struct nfs_renameargs *args)
2154 {
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         encode_compound_hdr(xdr, req, &hdr);
2160         encode_sequence(xdr, &args->seq_args, &hdr);
2161         encode_putfh(xdr, args->old_dir, &hdr);
2162         encode_savefh(xdr, &hdr);
2163         encode_putfh(xdr, args->new_dir, &hdr);
2164         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2165         encode_nops(&hdr);
2166 }
2167
2168 /*
2169  * Encode LINK request
2170  */
2171 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2172                              const struct nfs4_link_arg *args)
2173 {
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         encode_compound_hdr(xdr, req, &hdr);
2179         encode_sequence(xdr, &args->seq_args, &hdr);
2180         encode_putfh(xdr, args->fh, &hdr);
2181         encode_savefh(xdr, &hdr);
2182         encode_putfh(xdr, args->dir_fh, &hdr);
2183         encode_link(xdr, args->name, &hdr);
2184         encode_restorefh(xdr, &hdr);
2185         encode_getfattr(xdr, args->bitmask, &hdr);
2186         encode_nops(&hdr);
2187 }
2188
2189 /*
2190  * Encode CREATE request
2191  */
2192 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2193                                 const struct nfs4_create_arg *args)
2194 {
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         encode_compound_hdr(xdr, req, &hdr);
2200         encode_sequence(xdr, &args->seq_args, &hdr);
2201         encode_putfh(xdr, args->dir_fh, &hdr);
2202         encode_create(xdr, args, &hdr);
2203         encode_getfh(xdr, &hdr);
2204         encode_getfattr(xdr, args->bitmask, &hdr);
2205         encode_nops(&hdr);
2206 }
2207
2208 /*
2209  * Encode SYMLINK request
2210  */
2211 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2212                                  const struct nfs4_create_arg *args)
2213 {
2214         nfs4_xdr_enc_create(req, xdr, args);
2215 }
2216
2217 /*
2218  * Encode GETATTR request
2219  */
2220 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                  const struct nfs4_getattr_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->fh, &hdr);
2230         encode_getfattr(xdr, args->bitmask, &hdr);
2231         encode_nops(&hdr);
2232 }
2233
2234 /*
2235  * Encode a CLOSE request
2236  */
2237 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2238                                struct nfs_closeargs *args)
2239 {
2240         struct compound_hdr hdr = {
2241                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2242         };
2243
2244         encode_compound_hdr(xdr, req, &hdr);
2245         encode_sequence(xdr, &args->seq_args, &hdr);
2246         encode_putfh(xdr, args->fh, &hdr);
2247         encode_close(xdr, args, &hdr);
2248         encode_getfattr(xdr, args->bitmask, &hdr);
2249         encode_nops(&hdr);
2250 }
2251
2252 /*
2253  * Encode an OPEN request
2254  */
2255 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2256                               struct nfs_openargs *args)
2257 {
2258         struct compound_hdr hdr = {
2259                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260         };
2261
2262         encode_compound_hdr(xdr, req, &hdr);
2263         encode_sequence(xdr, &args->seq_args, &hdr);
2264         encode_putfh(xdr, args->fh, &hdr);
2265         encode_open(xdr, args, &hdr);
2266         encode_getfh(xdr, &hdr);
2267         if (args->access)
2268                 encode_access(xdr, args->access, &hdr);
2269         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2270         encode_nops(&hdr);
2271 }
2272
2273 /*
2274  * Encode an OPEN_CONFIRM request
2275  */
2276 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2277                                       struct xdr_stream *xdr,
2278                                       struct nfs_open_confirmargs *args)
2279 {
2280         struct compound_hdr hdr = {
2281                 .nops   = 0,
2282         };
2283
2284         encode_compound_hdr(xdr, req, &hdr);
2285         encode_putfh(xdr, args->fh, &hdr);
2286         encode_open_confirm(xdr, args, &hdr);
2287         encode_nops(&hdr);
2288 }
2289
2290 /*
2291  * Encode an OPEN request with no attributes.
2292  */
2293 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2294                                      struct xdr_stream *xdr,
2295                                      struct nfs_openargs *args)
2296 {
2297         struct compound_hdr hdr = {
2298                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2299         };
2300
2301         encode_compound_hdr(xdr, req, &hdr);
2302         encode_sequence(xdr, &args->seq_args, &hdr);
2303         encode_putfh(xdr, args->fh, &hdr);
2304         encode_open(xdr, args, &hdr);
2305         if (args->access)
2306                 encode_access(xdr, args->access, &hdr);
2307         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2308         encode_nops(&hdr);
2309 }
2310
2311 /*
2312  * Encode an OPEN_DOWNGRADE request
2313  */
2314 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2315                                         struct xdr_stream *xdr,
2316                                         struct nfs_closeargs *args)
2317 {
2318         struct compound_hdr hdr = {
2319                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320         };
2321
2322         encode_compound_hdr(xdr, req, &hdr);
2323         encode_sequence(xdr, &args->seq_args, &hdr);
2324         encode_putfh(xdr, args->fh, &hdr);
2325         encode_open_downgrade(xdr, args, &hdr);
2326         encode_getfattr(xdr, args->bitmask, &hdr);
2327         encode_nops(&hdr);
2328 }
2329
2330 /*
2331  * Encode a LOCK request
2332  */
2333 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2334                               struct nfs_lock_args *args)
2335 {
2336         struct compound_hdr hdr = {
2337                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338         };
2339
2340         encode_compound_hdr(xdr, req, &hdr);
2341         encode_sequence(xdr, &args->seq_args, &hdr);
2342         encode_putfh(xdr, args->fh, &hdr);
2343         encode_lock(xdr, args, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode a LOCKT request
2349  */
2350 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2351                                struct nfs_lockt_args *args)
2352 {
2353         struct compound_hdr hdr = {
2354                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355         };
2356
2357         encode_compound_hdr(xdr, req, &hdr);
2358         encode_sequence(xdr, &args->seq_args, &hdr);
2359         encode_putfh(xdr, args->fh, &hdr);
2360         encode_lockt(xdr, args, &hdr);
2361         encode_nops(&hdr);
2362 }
2363
2364 /*
2365  * Encode a LOCKU request
2366  */
2367 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2368                                struct nfs_locku_args *args)
2369 {
2370         struct compound_hdr hdr = {
2371                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372         };
2373
2374         encode_compound_hdr(xdr, req, &hdr);
2375         encode_sequence(xdr, &args->seq_args, &hdr);
2376         encode_putfh(xdr, args->fh, &hdr);
2377         encode_locku(xdr, args, &hdr);
2378         encode_nops(&hdr);
2379 }
2380
2381 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2382                                            struct xdr_stream *xdr,
2383                                         struct nfs_release_lockowner_args *args)
2384 {
2385         struct compound_hdr hdr = {
2386                 .minorversion = 0,
2387         };
2388
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a READLINK request
2396  */
2397 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                   const struct nfs4_readlink *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_readlink(xdr, args, req, &hdr);
2408
2409         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2410                         args->pgbase, args->pglen);
2411         encode_nops(&hdr);
2412 }
2413
2414 /*
2415  * Encode a READDIR request
2416  */
2417 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2418                                  const struct nfs4_readdir_arg *args)
2419 {
2420         struct compound_hdr hdr = {
2421                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2422         };
2423
2424         encode_compound_hdr(xdr, req, &hdr);
2425         encode_sequence(xdr, &args->seq_args, &hdr);
2426         encode_putfh(xdr, args->fh, &hdr);
2427         encode_readdir(xdr, args, req, &hdr);
2428
2429         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2430                          args->pgbase, args->count);
2431         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2432                         __func__, hdr.replen << 2, args->pages,
2433                         args->pgbase, args->count);
2434         encode_nops(&hdr);
2435 }
2436
2437 /*
2438  * Encode a READ request
2439  */
2440 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2441                               struct nfs_pgio_args *args)
2442 {
2443         struct compound_hdr hdr = {
2444                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445         };
2446
2447         encode_compound_hdr(xdr, req, &hdr);
2448         encode_sequence(xdr, &args->seq_args, &hdr);
2449         encode_putfh(xdr, args->fh, &hdr);
2450         encode_read(xdr, args, &hdr);
2451
2452         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2453                          args->pages, args->pgbase, args->count);
2454         req->rq_rcv_buf.flags |= XDRBUF_READ;
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * Encode an SETATTR request
2460  */
2461 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2462                                  struct nfs_setattrargs *args)
2463 {
2464         struct compound_hdr hdr = {
2465                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466         };
2467
2468         encode_compound_hdr(xdr, req, &hdr);
2469         encode_sequence(xdr, &args->seq_args, &hdr);
2470         encode_putfh(xdr, args->fh, &hdr);
2471         encode_setattr(xdr, args, args->server, &hdr);
2472         encode_getfattr(xdr, args->bitmask, &hdr);
2473         encode_nops(&hdr);
2474 }
2475
2476 /*
2477  * Encode a GETACL request
2478  */
2479 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2480                                 struct nfs_getaclargs *args)
2481 {
2482         struct compound_hdr hdr = {
2483                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2484         };
2485         uint32_t replen;
2486
2487         encode_compound_hdr(xdr, req, &hdr);
2488         encode_sequence(xdr, &args->seq_args, &hdr);
2489         encode_putfh(xdr, args->fh, &hdr);
2490         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2491         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2492
2493         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2494                 args->acl_pages, 0, args->acl_len);
2495
2496         encode_nops(&hdr);
2497 }
2498
2499 /*
2500  * Encode a WRITE request
2501  */
2502 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2503                                struct nfs_pgio_args *args)
2504 {
2505         struct compound_hdr hdr = {
2506                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507         };
2508
2509         encode_compound_hdr(xdr, req, &hdr);
2510         encode_sequence(xdr, &args->seq_args, &hdr);
2511         encode_putfh(xdr, args->fh, &hdr);
2512         encode_write(xdr, args, &hdr);
2513         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2514         if (args->bitmask)
2515                 encode_getfattr(xdr, args->bitmask, &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  *  a COMMIT request
2521  */
2522 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2523                                 struct nfs_commitargs *args)
2524 {
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_commit(xdr, args, &hdr);
2533         encode_nops(&hdr);
2534 }
2535
2536 /*
2537  * FSINFO request
2538  */
2539 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                 struct nfs4_fsinfo_arg *args)
2541 {
2542         struct compound_hdr hdr = {
2543                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544         };
2545
2546         encode_compound_hdr(xdr, req, &hdr);
2547         encode_sequence(xdr, &args->seq_args, &hdr);
2548         encode_putfh(xdr, args->fh, &hdr);
2549         encode_fsinfo(xdr, args->bitmask, &hdr);
2550         encode_nops(&hdr);
2551 }
2552
2553 /*
2554  * a PATHCONF request
2555  */
2556 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2557                                   const struct nfs4_pathconf_arg *args)
2558 {
2559         struct compound_hdr hdr = {
2560                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561         };
2562
2563         encode_compound_hdr(xdr, req, &hdr);
2564         encode_sequence(xdr, &args->seq_args, &hdr);
2565         encode_putfh(xdr, args->fh, &hdr);
2566         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2567                            &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * a STATFS request
2573  */
2574 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                 const struct nfs4_statfs_arg *args)
2576 {
2577         struct compound_hdr hdr = {
2578                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2579         };
2580
2581         encode_compound_hdr(xdr, req, &hdr);
2582         encode_sequence(xdr, &args->seq_args, &hdr);
2583         encode_putfh(xdr, args->fh, &hdr);
2584         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2585                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2586         encode_nops(&hdr);
2587 }
2588
2589 /*
2590  * GETATTR_BITMAP request
2591  */
2592 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2593                                      struct xdr_stream *xdr,
2594                                      struct nfs4_server_caps_arg *args)
2595 {
2596         const u32 *bitmask = args->bitmask;
2597         struct compound_hdr hdr = {
2598                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2599         };
2600
2601         encode_compound_hdr(xdr, req, &hdr);
2602         encode_sequence(xdr, &args->seq_args, &hdr);
2603         encode_putfh(xdr, args->fhandle, &hdr);
2604         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2605         encode_nops(&hdr);
2606 }
2607
2608 /*
2609  * a RENEW request
2610  */
2611 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                struct nfs_client *clp)
2613 {
2614         struct compound_hdr hdr = {
2615                 .nops   = 0,
2616         };
2617
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_renew(xdr, clp->cl_clientid, &hdr);
2620         encode_nops(&hdr);
2621 }
2622
2623 /*
2624  * a SETCLIENTID request
2625  */
2626 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2627                                      struct xdr_stream *xdr,
2628                                      struct nfs4_setclientid *sc)
2629 {
2630         struct compound_hdr hdr = {
2631                 .nops   = 0,
2632         };
2633
2634         encode_compound_hdr(xdr, req, &hdr);
2635         encode_setclientid(xdr, sc, &hdr);
2636         encode_nops(&hdr);
2637 }
2638
2639 /*
2640  * a SETCLIENTID_CONFIRM request
2641  */
2642 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2643                                              struct xdr_stream *xdr,
2644                                              struct nfs4_setclientid_res *arg)
2645 {
2646         struct compound_hdr hdr = {
2647                 .nops   = 0,
2648         };
2649
2650         encode_compound_hdr(xdr, req, &hdr);
2651         encode_setclientid_confirm(xdr, arg, &hdr);
2652         encode_nops(&hdr);
2653 }
2654
2655 /*
2656  * DELEGRETURN request
2657  */
2658 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2659                                      struct xdr_stream *xdr,
2660                                      const struct nfs4_delegreturnargs *args)
2661 {
2662         struct compound_hdr hdr = {
2663                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664         };
2665
2666         encode_compound_hdr(xdr, req, &hdr);
2667         encode_sequence(xdr, &args->seq_args, &hdr);
2668         encode_putfh(xdr, args->fhandle, &hdr);
2669         encode_getfattr(xdr, args->bitmask, &hdr);
2670         encode_delegreturn(xdr, args->stateid, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * Encode FS_LOCATIONS request
2676  */
2677 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2678                                       struct xdr_stream *xdr,
2679                                       struct nfs4_fs_locations_arg *args)
2680 {
2681         struct compound_hdr hdr = {
2682                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683         };
2684         uint32_t replen;
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_sequence(xdr, &args->seq_args, &hdr);
2688         if (args->migration) {
2689                 encode_putfh(xdr, args->fh, &hdr);
2690                 replen = hdr.replen;
2691                 encode_fs_locations(xdr, args->bitmask, &hdr);
2692                 if (args->renew)
2693                         encode_renew(xdr, args->clientid, &hdr);
2694         } else {
2695                 encode_putfh(xdr, args->dir_fh, &hdr);
2696                 encode_lookup(xdr, args->name, &hdr);
2697                 replen = hdr.replen;
2698                 encode_fs_locations(xdr, args->bitmask, &hdr);
2699         }
2700
2701         /* Set up reply kvec to capture returned fs_locations array. */
2702         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2703                         0, PAGE_SIZE);
2704         encode_nops(&hdr);
2705 }
2706
2707 /*
2708  * Encode SECINFO request
2709  */
2710 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2711                                 struct xdr_stream *xdr,
2712                                 struct nfs4_secinfo_arg *args)
2713 {
2714         struct compound_hdr hdr = {
2715                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716         };
2717
2718         encode_compound_hdr(xdr, req, &hdr);
2719         encode_sequence(xdr, &args->seq_args, &hdr);
2720         encode_putfh(xdr, args->dir_fh, &hdr);
2721         encode_secinfo(xdr, args->name, &hdr);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * Encode FSID_PRESENT request
2727  */
2728 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2729                                       struct xdr_stream *xdr,
2730                                       struct nfs4_fsid_present_arg *args)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_sequence(xdr, &args->seq_args, &hdr);
2738         encode_putfh(xdr, args->fh, &hdr);
2739         encode_getfh(xdr, &hdr);
2740         if (args->renew)
2741                 encode_renew(xdr, args->clientid, &hdr);
2742         encode_nops(&hdr);
2743 }
2744
2745 #if defined(CONFIG_NFS_V4_1)
2746 /*
2747  * BIND_CONN_TO_SESSION request
2748  */
2749 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2750                                 struct xdr_stream *xdr,
2751                                 struct nfs41_bind_conn_to_session_args *args)
2752 {
2753         struct compound_hdr hdr = {
2754                 .minorversion = args->client->cl_mvops->minor_version,
2755         };
2756
2757         encode_compound_hdr(xdr, req, &hdr);
2758         encode_bind_conn_to_session(xdr, args, &hdr);
2759         encode_nops(&hdr);
2760 }
2761
2762 /*
2763  * EXCHANGE_ID request
2764  */
2765 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2766                                      struct xdr_stream *xdr,
2767                                      struct nfs41_exchange_id_args *args)
2768 {
2769         struct compound_hdr hdr = {
2770                 .minorversion = args->client->cl_mvops->minor_version,
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_exchange_id(xdr, args, &hdr);
2775         encode_nops(&hdr);
2776 }
2777
2778 /*
2779  * a CREATE_SESSION request
2780  */
2781 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2782                                         struct xdr_stream *xdr,
2783                                         struct nfs41_create_session_args *args)
2784 {
2785         struct compound_hdr hdr = {
2786                 .minorversion = args->client->cl_mvops->minor_version,
2787         };
2788
2789         encode_compound_hdr(xdr, req, &hdr);
2790         encode_create_session(xdr, args, &hdr);
2791         encode_nops(&hdr);
2792 }
2793
2794 /*
2795  * a DESTROY_SESSION request
2796  */
2797 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2798                                          struct xdr_stream *xdr,
2799                                          struct nfs4_session *session)
2800 {
2801         struct compound_hdr hdr = {
2802                 .minorversion = session->clp->cl_mvops->minor_version,
2803         };
2804
2805         encode_compound_hdr(xdr, req, &hdr);
2806         encode_destroy_session(xdr, session, &hdr);
2807         encode_nops(&hdr);
2808 }
2809
2810 /*
2811  * a DESTROY_CLIENTID request
2812  */
2813 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2814                                          struct xdr_stream *xdr,
2815                                          struct nfs_client *clp)
2816 {
2817         struct compound_hdr hdr = {
2818                 .minorversion = clp->cl_mvops->minor_version,
2819         };
2820
2821         encode_compound_hdr(xdr, req, &hdr);
2822         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2823         encode_nops(&hdr);
2824 }
2825
2826 /*
2827  * a SEQUENCE request
2828  */
2829 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2830                                   struct nfs4_sequence_args *args)
2831 {
2832         struct compound_hdr hdr = {
2833                 .minorversion = nfs4_xdr_minorversion(args),
2834         };
2835
2836         encode_compound_hdr(xdr, req, &hdr);
2837         encode_sequence(xdr, args, &hdr);
2838         encode_nops(&hdr);
2839 }
2840
2841 /*
2842  * a GET_LEASE_TIME request
2843  */
2844 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2845                                         struct xdr_stream *xdr,
2846                                         struct nfs4_get_lease_time_args *args)
2847 {
2848         struct compound_hdr hdr = {
2849                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2850         };
2851         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2852
2853         encode_compound_hdr(xdr, req, &hdr);
2854         encode_sequence(xdr, &args->la_seq_args, &hdr);
2855         encode_putrootfh(xdr, &hdr);
2856         encode_fsinfo(xdr, lease_bitmap, &hdr);
2857         encode_nops(&hdr);
2858 }
2859
2860 /*
2861  * a RECLAIM_COMPLETE request
2862  */
2863 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2864                                           struct xdr_stream *xdr,
2865                                 struct nfs41_reclaim_complete_args *args)
2866 {
2867         struct compound_hdr hdr = {
2868                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2869         };
2870
2871         encode_compound_hdr(xdr, req, &hdr);
2872         encode_sequence(xdr, &args->seq_args, &hdr);
2873         encode_reclaim_complete(xdr, args, &hdr);
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  * Encode GETDEVICEINFO request
2879  */
2880 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2881                                        struct xdr_stream *xdr,
2882                                        struct nfs4_getdeviceinfo_args *args)
2883 {
2884         struct compound_hdr hdr = {
2885                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2886         };
2887
2888         encode_compound_hdr(xdr, req, &hdr);
2889         encode_sequence(xdr, &args->seq_args, &hdr);
2890         encode_getdeviceinfo(xdr, args, &hdr);
2891
2892         /* set up reply kvec. Subtract notification bitmap max size (2)
2893          * so that notification bitmap is put in xdr_buf tail */
2894         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2895                          args->pdev->pages, args->pdev->pgbase,
2896                          args->pdev->pglen);
2897
2898         encode_nops(&hdr);
2899 }
2900
2901 /*
2902  *  Encode LAYOUTGET request
2903  */
2904 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2905                                    struct xdr_stream *xdr,
2906                                    struct nfs4_layoutget_args *args)
2907 {
2908         struct compound_hdr hdr = {
2909                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910         };
2911
2912         encode_compound_hdr(xdr, req, &hdr);
2913         encode_sequence(xdr, &args->seq_args, &hdr);
2914         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2915         encode_layoutget(xdr, args, &hdr);
2916
2917         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2918             args->layout.pages, 0, args->layout.pglen);
2919
2920         encode_nops(&hdr);
2921 }
2922
2923 /*
2924  *  Encode LAYOUTCOMMIT request
2925  */
2926 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2927                                       struct xdr_stream *xdr,
2928                                       struct nfs4_layoutcommit_args *args)
2929 {
2930         struct nfs4_layoutcommit_data *data =
2931                 container_of(args, struct nfs4_layoutcommit_data, args);
2932         struct compound_hdr hdr = {
2933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934         };
2935
2936         encode_compound_hdr(xdr, req, &hdr);
2937         encode_sequence(xdr, &args->seq_args, &hdr);
2938         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2940         encode_getfattr(xdr, args->bitmask, &hdr);
2941         encode_nops(&hdr);
2942 }
2943
2944 /*
2945  * Encode LAYOUTRETURN request
2946  */
2947 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2948                                       struct xdr_stream *xdr,
2949                                       struct nfs4_layoutreturn_args *args)
2950 {
2951         struct compound_hdr hdr = {
2952                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2953         };
2954
2955         encode_compound_hdr(xdr, req, &hdr);
2956         encode_sequence(xdr, &args->seq_args, &hdr);
2957         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2958         encode_layoutreturn(xdr, args, &hdr);
2959         encode_nops(&hdr);
2960 }
2961
2962 /*
2963  * Encode SECINFO_NO_NAME request
2964  */
2965 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2966                                         struct xdr_stream *xdr,
2967                                         struct nfs41_secinfo_no_name_args *args)
2968 {
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971         };
2972
2973         encode_compound_hdr(xdr, req, &hdr);
2974         encode_sequence(xdr, &args->seq_args, &hdr);
2975         encode_putrootfh(xdr, &hdr);
2976         encode_secinfo_no_name(xdr, args, &hdr);
2977         encode_nops(&hdr);
2978         return 0;
2979 }
2980
2981 /*
2982  *  Encode TEST_STATEID request
2983  */
2984 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2985                                       struct xdr_stream *xdr,
2986                                       struct nfs41_test_stateid_args *args)
2987 {
2988         struct compound_hdr hdr = {
2989                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2990         };
2991
2992         encode_compound_hdr(xdr, req, &hdr);
2993         encode_sequence(xdr, &args->seq_args, &hdr);
2994         encode_test_stateid(xdr, args, &hdr);
2995         encode_nops(&hdr);
2996 }
2997
2998 /*
2999  *  Encode FREE_STATEID request
3000  */
3001 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3002                                      struct xdr_stream *xdr,
3003                                      struct nfs41_free_stateid_args *args)
3004 {
3005         struct compound_hdr hdr = {
3006                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007         };
3008
3009         encode_compound_hdr(xdr, req, &hdr);
3010         encode_sequence(xdr, &args->seq_args, &hdr);
3011         encode_free_stateid(xdr, args, &hdr);
3012         encode_nops(&hdr);
3013 }
3014 #endif /* CONFIG_NFS_V4_1 */
3015
3016 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3017 {
3018         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3019                 "Remaining buffer length is %tu words.\n",
3020                 func, xdr->end - xdr->p);
3021 }
3022
3023 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3024 {
3025         __be32 *p;
3026
3027         p = xdr_inline_decode(xdr, 4);
3028         if (unlikely(!p))
3029                 goto out_overflow;
3030         *len = be32_to_cpup(p);
3031         p = xdr_inline_decode(xdr, *len);
3032         if (unlikely(!p))
3033                 goto out_overflow;
3034         *string = (char *)p;
3035         return 0;
3036 out_overflow:
3037         print_overflow_msg(__func__, xdr);
3038         return -EIO;
3039 }
3040
3041 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3042 {
3043         __be32 *p;
3044
3045         p = xdr_inline_decode(xdr, 8);
3046         if (unlikely(!p))
3047                 goto out_overflow;
3048         hdr->status = be32_to_cpup(p++);
3049         hdr->taglen = be32_to_cpup(p);
3050
3051         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3052         if (unlikely(!p))
3053                 goto out_overflow;
3054         hdr->tag = (char *)p;
3055         p += XDR_QUADLEN(hdr->taglen);
3056         hdr->nops = be32_to_cpup(p);
3057         if (unlikely(hdr->nops < 1))
3058                 return nfs4_stat_to_errno(hdr->status);
3059         return 0;
3060 out_overflow:
3061         print_overflow_msg(__func__, xdr);
3062         return -EIO;
3063 }
3064
3065 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3066                 int *nfs_retval)
3067 {
3068         __be32 *p;
3069         uint32_t opnum;
3070         int32_t nfserr;
3071
3072         p = xdr_inline_decode(xdr, 8);
3073         if (unlikely(!p))
3074                 goto out_overflow;
3075         opnum = be32_to_cpup(p++);
3076         if (unlikely(opnum != expected))
3077                 goto out_bad_operation;
3078         nfserr = be32_to_cpup(p);
3079         if (nfserr == NFS_OK)
3080                 *nfs_retval = 0;
3081         else
3082                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3083         return true;
3084 out_bad_operation:
3085         dprintk("nfs: Server returned operation"
3086                 " %d but we issued a request for %d\n",
3087                         opnum, expected);
3088         *nfs_retval = -EREMOTEIO;
3089         return false;
3090 out_overflow:
3091         print_overflow_msg(__func__, xdr);
3092         *nfs_retval = -EIO;
3093         return false;
3094 }
3095
3096 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3097 {
3098         int retval;
3099
3100         __decode_op_hdr(xdr, expected, &retval);
3101         return retval;
3102 }
3103
3104 /* Dummy routine */
3105 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3106 {
3107         __be32 *p;
3108         unsigned int strlen;
3109         char *str;
3110
3111         p = xdr_inline_decode(xdr, 12);
3112         if (likely(p))
3113                 return decode_opaque_inline(xdr, &strlen, &str);
3114         print_overflow_msg(__func__, xdr);
3115         return -EIO;
3116 }
3117
3118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3119 {
3120         uint32_t bmlen;
3121         __be32 *p;
3122
3123         p = xdr_inline_decode(xdr, 4);
3124         if (unlikely(!p))
3125                 goto out_overflow;
3126         bmlen = be32_to_cpup(p);
3127
3128         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3129         p = xdr_inline_decode(xdr, (bmlen << 2));
3130         if (unlikely(!p))
3131                 goto out_overflow;
3132         if (bmlen > 0) {
3133                 bitmap[0] = be32_to_cpup(p++);
3134                 if (bmlen > 1) {
3135                         bitmap[1] = be32_to_cpup(p++);
3136                         if (bmlen > 2)
3137                                 bitmap[2] = be32_to_cpup(p);
3138                 }
3139         }
3140         return 0;
3141 out_overflow:
3142         print_overflow_msg(__func__, xdr);
3143         return -EIO;
3144 }
3145
3146 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3147 {
3148         __be32 *p;
3149
3150         p = xdr_inline_decode(xdr, 4);
3151         if (unlikely(!p))
3152                 goto out_overflow;
3153         *attrlen = be32_to_cpup(p);
3154         *savep = xdr_stream_pos(xdr);
3155         return 0;
3156 out_overflow:
3157         print_overflow_msg(__func__, xdr);
3158         return -EIO;
3159 }
3160
3161 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3162 {
3163         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3164                 int ret;
3165                 ret = decode_attr_bitmap(xdr, bitmask);
3166                 if (unlikely(ret < 0))
3167                         return ret;
3168                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3169         } else
3170                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3171         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3172                 bitmask[0], bitmask[1], bitmask[2]);
3173         return 0;
3174 }
3175
3176 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3177 {
3178         __be32 *p;
3179         int ret = 0;
3180
3181         *type = 0;
3182         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3183                 return -EIO;
3184         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3185                 p = xdr_inline_decode(xdr, 4);
3186                 if (unlikely(!p))
3187                         goto out_overflow;
3188                 *type = be32_to_cpup(p);
3189                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3190                         dprintk("%s: bad type %d\n", __func__, *type);
3191                         return -EIO;
3192                 }
3193                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3194                 ret = NFS_ATTR_FATTR_TYPE;
3195         }
3196         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3197         return ret;
3198 out_overflow:
3199         print_overflow_msg(__func__, xdr);
3200         return -EIO;
3201 }
3202
3203 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3204                                       uint32_t *bitmap, uint32_t *type)
3205 {
3206         __be32 *p;
3207
3208         *type = 0;
3209         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3210                 return -EIO;
3211         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3212                 p = xdr_inline_decode(xdr, 4);
3213                 if (unlikely(!p))
3214                         goto out_overflow;
3215                 *type = be32_to_cpup(p);
3216                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3217         }
3218         dprintk("%s: expire type=0x%x\n", __func__, *type);
3219         return 0;
3220 out_overflow:
3221         print_overflow_msg(__func__, xdr);
3222         return -EIO;
3223 }
3224
3225 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3226 {
3227         __be32 *p;
3228         int ret = 0;
3229
3230         *change = 0;
3231         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3232                 return -EIO;
3233         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3234                 p = xdr_inline_decode(xdr, 8);
3235                 if (unlikely(!p))
3236                         goto out_overflow;
3237                 xdr_decode_hyper(p, change);
3238                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3239                 ret = NFS_ATTR_FATTR_CHANGE;
3240         }
3241         dprintk("%s: change attribute=%Lu\n", __func__,
3242                         (unsigned long long)*change);
3243         return ret;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248
3249 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3250 {
3251         __be32 *p;
3252         int ret = 0;
3253
3254         *size = 0;
3255         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3256                 return -EIO;
3257         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3258                 p = xdr_inline_decode(xdr, 8);
3259                 if (unlikely(!p))
3260                         goto out_overflow;
3261                 xdr_decode_hyper(p, size);
3262                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3263                 ret = NFS_ATTR_FATTR_SIZE;
3264         }
3265         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3266         return ret;
3267 out_overflow:
3268         print_overflow_msg(__func__, xdr);
3269         return -EIO;
3270 }
3271
3272 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3273 {
3274         __be32 *p;
3275
3276         *res = 0;
3277         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3278                 return -EIO;
3279         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3280                 p = xdr_inline_decode(xdr, 4);
3281                 if (unlikely(!p))
3282                         goto out_overflow;
3283                 *res = be32_to_cpup(p);
3284                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3285         }
3286         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3287         return 0;
3288 out_overflow:
3289         print_overflow_msg(__func__, xdr);
3290         return -EIO;
3291 }
3292
3293 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294 {
3295         __be32 *p;
3296
3297         *res = 0;
3298         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3299                 return -EIO;
3300         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3301                 p = xdr_inline_decode(xdr, 4);
3302                 if (unlikely(!p))
3303                         goto out_overflow;
3304                 *res = be32_to_cpup(p);
3305                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3306         }
3307         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3308         return 0;
3309 out_overflow:
3310         print_overflow_msg(__func__, xdr);
3311         return -EIO;
3312 }
3313
3314 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3315 {
3316         __be32 *p;
3317         int ret = 0;
3318
3319         fsid->major = 0;
3320         fsid->minor = 0;
3321         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3322                 return -EIO;
3323         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3324                 p = xdr_inline_decode(xdr, 16);
3325                 if (unlikely(!p))
3326                         goto out_overflow;
3327                 p = xdr_decode_hyper(p, &fsid->major);
3328                 xdr_decode_hyper(p, &fsid->minor);
3329                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3330                 ret = NFS_ATTR_FATTR_FSID;
3331         }
3332         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3333                         (unsigned long long)fsid->major,
3334                         (unsigned long long)fsid->minor);
3335         return ret;
3336 out_overflow:
3337         print_overflow_msg(__func__, xdr);
3338         return -EIO;
3339 }
3340
3341 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3342 {
3343         __be32 *p;
3344
3345         *res = 60;
3346         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3347                 return -EIO;
3348         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3349                 p = xdr_inline_decode(xdr, 4);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 *res = be32_to_cpup(p);
3353                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3354         }
3355         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3356         return 0;
3357 out_overflow:
3358         print_overflow_msg(__func__, xdr);
3359         return -EIO;
3360 }
3361
3362 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3363 {
3364         __be32 *p;
3365
3366         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3367                 return -EIO;
3368         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3369                 p = xdr_inline_decode(xdr, 4);
3370                 if (unlikely(!p))
3371                         goto out_overflow;
3372                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3373                 *res = -be32_to_cpup(p);
3374         }
3375         return 0;
3376 out_overflow:
3377         print_overflow_msg(__func__, xdr);
3378         return -EIO;
3379 }
3380
3381 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3382                                  uint32_t *bitmap, uint32_t *bitmask)
3383 {
3384         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3385                 int ret;
3386                 ret = decode_attr_bitmap(xdr, bitmask);
3387                 if (unlikely(ret < 0))
3388                         return ret;
3389                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3390         } else
3391                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3392         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3393                 bitmask[0], bitmask[1], bitmask[2]);
3394         return 0;
3395 }
3396
3397 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3398 {
3399         __be32 *p;
3400         int len;
3401
3402         if (fh != NULL)
3403                 memset(fh, 0, sizeof(*fh));
3404
3405         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3406                 return -EIO;
3407         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3408                 p = xdr_inline_decode(xdr, 4);
3409                 if (unlikely(!p))
3410                         goto out_overflow;
3411                 len = be32_to_cpup(p);
3412                 if (len > NFS4_FHSIZE)
3413                         return -EIO;
3414                 p = xdr_inline_decode(xdr, len);
3415                 if (unlikely(!p))
3416                         goto out_overflow;
3417                 if (fh != NULL) {
3418                         memcpy(fh->data, p, len);
3419                         fh->size = len;
3420                 }
3421                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3422         }
3423         return 0;
3424 out_overflow:
3425         print_overflow_msg(__func__, xdr);
3426         return -EIO;
3427 }
3428
3429 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3430 {
3431         __be32 *p;
3432
3433         *res = 0;
3434         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3435                 return -EIO;
3436         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3437                 p = xdr_inline_decode(xdr, 4);
3438                 if (unlikely(!p))
3439                         goto out_overflow;
3440                 *res = be32_to_cpup(p);
3441                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3442         }
3443         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3444         return 0;
3445 out_overflow:
3446         print_overflow_msg(__func__, xdr);
3447         return -EIO;
3448 }
3449
3450 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3451 {
3452         __be32 *p;
3453         int ret = 0;
3454
3455         *fileid = 0;
3456         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3457                 return -EIO;
3458         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3459                 p = xdr_inline_decode(xdr, 8);
3460                 if (unlikely(!p))
3461                         goto out_overflow;
3462                 xdr_decode_hyper(p, fileid);
3463                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3464                 ret = NFS_ATTR_FATTR_FILEID;
3465         }
3466         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3467         return ret;
3468 out_overflow:
3469         print_overflow_msg(__func__, xdr);
3470         return -EIO;
3471 }
3472
3473 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3474 {
3475         __be32 *p;
3476         int ret = 0;
3477
3478         *fileid = 0;
3479         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3480                 return -EIO;
3481         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3482                 p = xdr_inline_decode(xdr, 8);
3483                 if (unlikely(!p))
3484                         goto out_overflow;
3485                 xdr_decode_hyper(p, fileid);
3486                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3487                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3488         }
3489         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3490         return ret;
3491 out_overflow:
3492         print_overflow_msg(__func__, xdr);
3493         return -EIO;
3494 }
3495
3496 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3497 {
3498         __be32 *p;
3499         int status = 0;
3500
3501         *res = 0;
3502         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3503                 return -EIO;
3504         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3505                 p = xdr_inline_decode(xdr, 8);
3506                 if (unlikely(!p))
3507                         goto out_overflow;
3508                 xdr_decode_hyper(p, res);
3509                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3510         }
3511         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3512         return status;
3513 out_overflow:
3514         print_overflow_msg(__func__, xdr);
3515         return -EIO;
3516 }
3517
3518 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3519 {
3520         __be32 *p;
3521         int status = 0;
3522
3523         *res = 0;
3524         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3525                 return -EIO;
3526         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3527                 p = xdr_inline_decode(xdr, 8);
3528                 if (unlikely(!p))
3529                         goto out_overflow;
3530                 xdr_decode_hyper(p, res);
3531                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3532         }
3533         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3534         return status;
3535 out_overflow:
3536         print_overflow_msg(__func__, xdr);
3537         return -EIO;
3538 }
3539
3540 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3541 {
3542         __be32 *p;
3543         int status = 0;
3544
3545         *res = 0;
3546         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3547                 return -EIO;
3548         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3549                 p = xdr_inline_decode(xdr, 8);
3550                 if (unlikely(!p))
3551                         goto out_overflow;
3552                 xdr_decode_hyper(p, res);
3553                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3554         }
3555         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3556         return status;
3557 out_overflow:
3558         print_overflow_msg(__func__, xdr);
3559         return -EIO;
3560 }
3561
3562 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3563 {
3564         u32 n;
3565         __be32 *p;
3566         int status = 0;
3567
3568         p = xdr_inline_decode(xdr, 4);
3569         if (unlikely(!p))
3570                 goto out_overflow;
3571         n = be32_to_cpup(p);
3572         if (n == 0)
3573                 goto root_path;
3574         dprintk("pathname4: ");
3575         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3576                 dprintk("cannot parse %d components in path\n", n);
3577                 goto out_eio;
3578         }
3579         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3580                 struct nfs4_string *component = &path->components[path->ncomponents];
3581                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3582                 if (unlikely(status != 0))
3583                         goto out_eio;
3584                 ifdebug (XDR)
3585                         pr_cont("%s%.*s ",
3586                                 (path->ncomponents != n ? "/ " : ""),
3587                                 component->len, component->data);
3588         }
3589 out:
3590         return status;
3591 root_path:
3592 /* a root pathname is sent as a zero component4 */
3593         path->ncomponents = 1;
3594         path->components[0].len=0;
3595         path->components[0].data=NULL;
3596         dprintk("pathname4: /\n");
3597         goto out;
3598 out_eio:
3599         dprintk(" status %d", status);
3600         status = -EIO;
3601         goto out;
3602 out_overflow:
3603         print_overflow_msg(__func__, xdr);
3604         return -EIO;
3605 }
3606
3607 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3608 {
3609         int n;
3610         __be32 *p;
3611         int status = -EIO;
3612
3613         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3614                 goto out;
3615         status = 0;
3616         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3617                 goto out;
3618         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3619         status = -EIO;
3620         /* Ignore borken servers that return unrequested attrs */
3621         if (unlikely(res == NULL))
3622                 goto out;
3623         dprintk("%s: fsroot:\n", __func__);
3624         status = decode_pathname(xdr, &res->fs_path);
3625         if (unlikely(status != 0))
3626                 goto out;
3627         p = xdr_inline_decode(xdr, 4);
3628         if (unlikely(!p))
3629                 goto out_overflow;
3630         n = be32_to_cpup(p);
3631         if (n <= 0)
3632                 goto out_eio;
3633         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3634                 u32 m;
3635                 struct nfs4_fs_location *loc;
3636
3637                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3638                         break;
3639                 loc = &res->locations[res->nlocations];
3640                 p = xdr_inline_decode(xdr, 4);
3641                 if (unlikely(!p))
3642                         goto out_overflow;
3643                 m = be32_to_cpup(p);
3644
3645                 dprintk("%s: servers:\n", __func__);
3646                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3647                         struct nfs4_string *server;
3648
3649                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3650                                 unsigned int i;
3651                                 dprintk("%s: using first %u of %u servers "
3652                                         "returned for location %u\n",
3653                                                 __func__,
3654                                                 NFS4_FS_LOCATION_MAXSERVERS,
3655                                                 m, res->nlocations);
3656                                 for (i = loc->nservers; i < m; i++) {
3657                                         unsigned int len;
3658                                         char *data;
3659                                         status = decode_opaque_inline(xdr, &len, &data);
3660                                         if (unlikely(status != 0))
3661                                                 goto out_eio;
3662                                 }
3663                                 break;
3664                         }
3665                         server = &loc->servers[loc->nservers];
3666                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3667                         if (unlikely(status != 0))
3668                                 goto out_eio;
3669                         dprintk("%s ", server->data);
3670                 }
3671                 status = decode_pathname(xdr, &loc->rootpath);
3672                 if (unlikely(status != 0))
3673                         goto out_eio;
3674         }
3675         if (res->nlocations != 0)
3676                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3677 out:
3678         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3679         return status;
3680 out_overflow:
3681         print_overflow_msg(__func__, xdr);
3682 out_eio:
3683         status = -EIO;
3684         goto out;
3685 }
3686
3687 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3688 {
3689         __be32 *p;
3690         int status = 0;
3691
3692         *res = 0;
3693         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3694                 return -EIO;
3695         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3696                 p = xdr_inline_decode(xdr, 8);
3697                 if (unlikely(!p))
3698                         goto out_overflow;
3699                 xdr_decode_hyper(p, res);
3700                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3701         }
3702         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3703         return status;
3704 out_overflow:
3705         print_overflow_msg(__func__, xdr);
3706         return -EIO;
3707 }
3708
3709 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3710 {
3711         __be32 *p;
3712         int status = 0;
3713
3714         *maxlink = 1;
3715         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3716                 return -EIO;
3717         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3718                 p = xdr_inline_decode(xdr, 4);
3719                 if (unlikely(!p))
3720                         goto out_overflow;
3721                 *maxlink = be32_to_cpup(p);
3722                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3723         }
3724         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3725         return status;
3726 out_overflow:
3727         print_overflow_msg(__func__, xdr);
3728         return -EIO;
3729 }
3730
3731 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3732 {
3733         __be32 *p;
3734         int status = 0;
3735
3736         *maxname = 1024;
3737         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3738                 return -EIO;
3739         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3740                 p = xdr_inline_decode(xdr, 4);
3741                 if (unlikely(!p))
3742                         goto out_overflow;
3743                 *maxname = be32_to_cpup(p);
3744                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3745         }
3746         dprintk("%s: maxname=%u\n", __func__, *maxname);
3747         return status;
3748 out_overflow:
3749         print_overflow_msg(__func__, xdr);
3750         return -EIO;
3751 }
3752
3753 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3754 {
3755         __be32 *p;
3756         int status = 0;
3757
3758         *res = 1024;
3759         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3762                 uint64_t maxread;
3763                 p = xdr_inline_decode(xdr, 8);
3764                 if (unlikely(!p))
3765                         goto out_overflow;
3766                 xdr_decode_hyper(p, &maxread);
3767                 if (maxread > 0x7FFFFFFF)
3768                         maxread = 0x7FFFFFFF;
3769                 *res = (uint32_t)maxread;
3770                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3771         }
3772         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3773         return status;
3774 out_overflow:
3775         print_overflow_msg(__func__, xdr);
3776         return -EIO;
3777 }
3778
3779 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3780 {
3781         __be32 *p;
3782         int status = 0;
3783
3784         *res = 1024;
3785         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3786                 return -EIO;
3787         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3788                 uint64_t maxwrite;
3789                 p = xdr_inline_decode(xdr, 8);
3790                 if (unlikely(!p))
3791                         goto out_overflow;
3792                 xdr_decode_hyper(p, &maxwrite);
3793                 if (maxwrite > 0x7FFFFFFF)
3794                         maxwrite = 0x7FFFFFFF;
3795                 *res = (uint32_t)maxwrite;
3796                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3797         }
3798         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3799         return status;
3800 out_overflow:
3801         print_overflow_msg(__func__, xdr);
3802         return -EIO;
3803 }
3804
3805 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3806 {
3807         uint32_t tmp;
3808         __be32 *p;
3809         int ret = 0;
3810
3811         *mode = 0;
3812         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3813                 return -EIO;
3814         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3815                 p = xdr_inline_decode(xdr, 4);
3816                 if (unlikely(!p))
3817                         goto out_overflow;
3818                 tmp = be32_to_cpup(p);
3819                 *mode = tmp & ~S_IFMT;
3820                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3821                 ret = NFS_ATTR_FATTR_MODE;
3822         }
3823         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3824         return ret;
3825 out_overflow:
3826         print_overflow_msg(__func__, xdr);
3827         return -EIO;
3828 }
3829
3830 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3831 {
3832         __be32 *p;
3833         int ret = 0;
3834
3835         *nlink = 1;
3836         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3837                 return -EIO;
3838         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3839                 p = xdr_inline_decode(xdr, 4);
3840                 if (unlikely(!p))
3841                         goto out_overflow;
3842                 *nlink = be32_to_cpup(p);
3843                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3844                 ret = NFS_ATTR_FATTR_NLINK;
3845         }
3846         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3847         return ret;
3848 out_overflow:
3849         print_overflow_msg(__func__, xdr);
3850         return -EIO;
3851 }
3852
3853 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3854                 const struct nfs_server *server, kuid_t *uid,
3855                 struct nfs4_string *owner_name)
3856 {
3857         uint32_t len;
3858         __be32 *p;
3859         int ret = 0;
3860
3861         *uid = make_kuid(&init_user_ns, -2);
3862         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3865                 p = xdr_inline_decode(xdr, 4);
3866                 if (unlikely(!p))
3867                         goto out_overflow;
3868                 len = be32_to_cpup(p);
3869                 p = xdr_inline_decode(xdr, len);
3870                 if (unlikely(!p))
3871                         goto out_overflow;
3872                 if (owner_name != NULL) {
3873                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3874                         if (owner_name->data != NULL) {
3875                                 owner_name->len = len;
3876                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3877                         }
3878                 } else if (len < XDR_MAX_NETOBJ) {
3879                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3880                                 ret = NFS_ATTR_FATTR_OWNER;
3881                         else
3882                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3883                                                 __func__);
3884                 } else
3885                         dprintk("%s: name too long (%u)!\n",
3886                                         __func__, len);
3887                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3888         }
3889         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3890         return ret;
3891 out_overflow:
3892         print_overflow_msg(__func__, xdr);
3893         return -EIO;
3894 }
3895
3896 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3897                 const struct nfs_server *server, kgid_t *gid,
3898                 struct nfs4_string *group_name)
3899 {
3900         uint32_t len;
3901         __be32 *p;
3902         int ret = 0;
3903
3904         *gid = make_kgid(&init_user_ns, -2);
3905         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3906                 return -EIO;
3907         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3908                 p = xdr_inline_decode(xdr, 4);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 len = be32_to_cpup(p);
3912                 p = xdr_inline_decode(xdr, len);
3913                 if (unlikely(!p))
3914                         goto out_overflow;
3915                 if (group_name != NULL) {
3916                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3917                         if (group_name->data != NULL) {
3918                                 group_name->len = len;
3919                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3920                         }
3921                 } else if (len < XDR_MAX_NETOBJ) {
3922                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3923                                 ret = NFS_ATTR_FATTR_GROUP;
3924                         else
3925                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3926                                                 __func__);
3927                 } else
3928                         dprintk("%s: name too long (%u)!\n",
3929                                         __func__, len);
3930                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3931         }
3932         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3933         return ret;
3934 out_overflow:
3935         print_overflow_msg(__func__, xdr);
3936         return -EIO;
3937 }
3938
3939 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3940 {
3941         uint32_t major = 0, minor = 0;
3942         __be32 *p;
3943         int ret = 0;
3944
3945         *rdev = MKDEV(0,0);
3946         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3947                 return -EIO;
3948         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3949                 dev_t tmp;
3950
3951                 p = xdr_inline_decode(xdr, 8);
3952                 if (unlikely(!p))
3953                         goto out_overflow;
3954                 major = be32_to_cpup(p++);
3955                 minor = be32_to_cpup(p);
3956                 tmp = MKDEV(major, minor);
3957                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3958                         *rdev = tmp;
3959                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3960                 ret = NFS_ATTR_FATTR_RDEV;
3961         }
3962         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3963         return ret;
3964 out_overflow:
3965         print_overflow_msg(__func__, xdr);
3966         return -EIO;
3967 }
3968
3969 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3970 {
3971         __be32 *p;
3972         int status = 0;
3973
3974         *res = 0;
3975         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3976                 return -EIO;
3977         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3978                 p = xdr_inline_decode(xdr, 8);
3979                 if (unlikely(!p))
3980                         goto out_overflow;
3981                 xdr_decode_hyper(p, res);
3982                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3983         }
3984         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3985         return status;
3986 out_overflow:
3987         print_overflow_msg(__func__, xdr);
3988         return -EIO;
3989 }
3990
3991 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3992 {
3993         __be32 *p;
3994         int status = 0;
3995
3996         *res = 0;
3997         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3998                 return -EIO;
3999         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4000                 p = xdr_inline_decode(xdr, 8);
4001                 if (unlikely(!p))
4002                         goto out_overflow;
4003                 xdr_decode_hyper(p, res);
4004                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4005         }
4006         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4007         return status;
4008 out_overflow:
4009         print_overflow_msg(__func__, xdr);
4010         return -EIO;
4011 }
4012
4013 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4014 {
4015         __be32 *p;
4016         int status = 0;
4017
4018         *res = 0;
4019         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4020                 return -EIO;
4021         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4022                 p = xdr_inline_decode(xdr, 8);
4023                 if (unlikely(!p))
4024                         goto out_overflow;
4025                 xdr_decode_hyper(p, res);
4026                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4027         }
4028         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4029         return status;
4030 out_overflow:
4031         print_overflow_msg(__func__, xdr);
4032         return -EIO;
4033 }
4034
4035 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4036 {
4037         __be32 *p;
4038         int ret = 0;
4039
4040         *used = 0;
4041         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4042                 return -EIO;
4043         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4044                 p = xdr_inline_decode(xdr, 8);
4045                 if (unlikely(!p))
4046                         goto out_overflow;
4047                 xdr_decode_hyper(p, used);
4048                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4049                 ret = NFS_ATTR_FATTR_SPACE_USED;
4050         }
4051         dprintk("%s: space used=%Lu\n", __func__,
4052                         (unsigned long long)*used);
4053         return ret;
4054 out_overflow:
4055         print_overflow_msg(__func__, xdr);
4056         return -EIO;
4057 }
4058
4059 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4060 {
4061         __be32 *p;
4062         uint64_t sec;
4063         uint32_t nsec;
4064
4065         p = xdr_inline_decode(xdr, 12);
4066         if (unlikely(!p))
4067                 goto out_overflow;
4068         p = xdr_decode_hyper(p, &sec);
4069         nsec = be32_to_cpup(p);
4070         time->tv_sec = (time_t)sec;
4071         time->tv_nsec = (long)nsec;
4072         return 0;
4073 out_overflow:
4074         print_overflow_msg(__func__, xdr);
4075         return -EIO;
4076 }
4077
4078 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4079 {
4080         int status = 0;
4081
4082         time->tv_sec = 0;
4083         time->tv_nsec = 0;
4084         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4085                 return -EIO;
4086         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4087                 status = decode_attr_time(xdr, time);
4088                 if (status == 0)
4089                         status = NFS_ATTR_FATTR_ATIME;
4090                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4091         }
4092         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4093         return status;
4094 }
4095
4096 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097 {
4098         int status = 0;
4099
4100         time->tv_sec = 0;
4101         time->tv_nsec = 0;
4102         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4103                 return -EIO;
4104         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4105                 status = decode_attr_time(xdr, time);
4106                 if (status == 0)
4107                         status = NFS_ATTR_FATTR_CTIME;
4108                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4109         }
4110         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4111         return status;
4112 }
4113
4114 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4115                                   struct timespec *time)
4116 {
4117         int status = 0;
4118
4119         time->tv_sec = 0;
4120         time->tv_nsec = 0;
4121         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4122                 return -EIO;
4123         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4124                 status = decode_attr_time(xdr, time);
4125                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4126         }
4127         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4128                 (long)time->tv_nsec);
4129         return status;
4130 }
4131
4132 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4133                                         struct nfs4_label *label)
4134 {
4135         uint32_t pi = 0;
4136         uint32_t lfs = 0;
4137         __u32 len;
4138         __be32 *p;
4139         int status = 0;
4140
4141         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4142                 return -EIO;
4143         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4144                 p = xdr_inline_decode(xdr, 4);
4145                 if (unlikely(!p))
4146                         goto out_overflow;
4147                 lfs = be32_to_cpup(p++);
4148                 p = xdr_inline_decode(xdr, 4);
4149                 if (unlikely(!p))
4150                         goto out_overflow;
4151                 pi = be32_to_cpup(p++);
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         goto out_overflow;
4155                 len = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, len);
4157                 if (unlikely(!p))
4158                         goto out_overflow;
4159                 if (len < NFS4_MAXLABELLEN) {
4160                         if (label) {
4161                                 memcpy(label->label, p, len);
4162                                 label->len = len;
4163                                 label->pi = pi;
4164                                 label->lfs = lfs;
4165                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4166                         }
4167                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4168                 } else
4169                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4170                                         __func__, len);
4171         }
4172         if (label && label->label)
4173                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4174                         (char *)label->label, label->len, label->pi, label->lfs);
4175         return status;
4176
4177 out_overflow:
4178         print_overflow_msg(__func__, xdr);
4179         return -EIO;
4180 }
4181
4182 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4183 {
4184         int status = 0;
4185
4186         time->tv_sec = 0;
4187         time->tv_nsec = 0;
4188         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4189                 return -EIO;
4190         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4191                 status = decode_attr_time(xdr, time);
4192                 if (status == 0)
4193                         status = NFS_ATTR_FATTR_MTIME;
4194                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4195         }
4196         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4197         return status;
4198 }
4199
4200 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4201 {
4202         unsigned int attrwords = XDR_QUADLEN(attrlen);
4203         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4204
4205         if (unlikely(attrwords != nwords)) {
4206                 dprintk("%s: server returned incorrect attribute length: "
4207                         "%u %c %u\n",
4208                                 __func__,
4209                                 attrwords << 2,
4210                                 (attrwords < nwords) ? '<' : '>',
4211                                 nwords << 2);
4212                 return -EIO;
4213         }
4214         return 0;
4215 }
4216
4217 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4218 {
4219         __be32 *p;
4220
4221         p = xdr_inline_decode(xdr, 20);
4222         if (unlikely(!p))
4223                 goto out_overflow;
4224         cinfo->atomic = be32_to_cpup(p++);
4225         p = xdr_decode_hyper(p, &cinfo->before);
4226         xdr_decode_hyper(p, &cinfo->after);
4227         return 0;
4228 out_overflow:
4229         print_overflow_msg(__func__, xdr);
4230         return -EIO;
4231 }
4232
4233 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4234 {
4235         __be32 *p;
4236         uint32_t supp, acc;
4237         int status;
4238
4239         status = decode_op_hdr(xdr, OP_ACCESS);
4240         if (status)
4241                 return status;
4242         p = xdr_inline_decode(xdr, 8);
4243         if (unlikely(!p))
4244                 goto out_overflow;
4245         supp = be32_to_cpup(p++);
4246         acc = be32_to_cpup(p);
4247         *supported = supp;
4248         *access = acc;
4249         return 0;
4250 out_overflow:
4251         print_overflow_msg(__func__, xdr);
4252         return -EIO;
4253 }
4254
4255 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4256 {
4257         __be32 *p;
4258
4259         p = xdr_inline_decode(xdr, len);
4260         if (likely(p)) {
4261                 memcpy(buf, p, len);
4262                 return 0;
4263         }
4264         print_overflow_msg(__func__, xdr);
4265         return -EIO;
4266 }
4267
4268 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4269 {
4270         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4271 }
4272
4273 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4274 {
4275         stateid->type = NFS4_OPEN_STATEID_TYPE;
4276         return decode_stateid(xdr, stateid);
4277 }
4278
4279 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4280 {
4281         stateid->type = NFS4_LOCK_STATEID_TYPE;
4282         return decode_stateid(xdr, stateid);
4283 }
4284
4285 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4286 {
4287         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4288         return decode_stateid(xdr, stateid);
4289 }
4290
4291 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4292 {
4293         int status;
4294
4295         status = decode_op_hdr(xdr, OP_CLOSE);
4296         if (status != -EIO)
4297                 nfs_increment_open_seqid(status, res->seqid);
4298         if (!status)
4299                 status = decode_open_stateid(xdr, &res->stateid);
4300         return status;
4301 }
4302
4303 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4304 {
4305         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4306 }
4307
4308 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4309 {
4310         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4314 {
4315         int status;
4316
4317         status = decode_op_hdr(xdr, OP_COMMIT);
4318         if (!status)
4319                 status = decode_write_verifier(xdr, &res->verf->verifier);
4320         return status;
4321 }
4322
4323 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4324 {
4325         __be32 *p;
4326         uint32_t bmlen;
4327         int status;
4328
4329         status = decode_op_hdr(xdr, OP_CREATE);
4330         if (status)
4331                 return status;
4332         if ((status = decode_change_info(xdr, cinfo)))
4333                 return status;
4334         p = xdr_inline_decode(xdr, 4);
4335         if (unlikely(!p))
4336                 goto out_overflow;
4337         bmlen = be32_to_cpup(p);
4338         p = xdr_inline_decode(xdr, bmlen << 2);
4339         if (likely(p))
4340                 return 0;
4341 out_overflow:
4342         print_overflow_msg(__func__, xdr);
4343         return -EIO;
4344 }
4345
4346 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4347 {
4348         unsigned int savep;
4349         uint32_t attrlen, bitmap[3] = {0};
4350         int status;
4351
4352         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4355                 goto xdr_error;
4356         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4361                                                  &res->fh_expire_type)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4366                 goto xdr_error;
4367         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4368                 goto xdr_error;
4369         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4370                                 res->exclcreat_bitmask)) != 0)
4371                 goto xdr_error;
4372         status = verify_attr_len(xdr, savep, attrlen);
4373 xdr_error:
4374         dprintk("%s: xdr returned %d!\n", __func__, -status);
4375         return status;
4376 }
4377
4378 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4379 {
4380         unsigned int savep;
4381         uint32_t attrlen, bitmap[3] = {0};
4382         int status;
4383
4384         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4387                 goto xdr_error;
4388         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4389                 goto xdr_error;
4390
4391         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4396                 goto xdr_error;
4397
4398         status = -EIO;
4399         if (unlikely(bitmap[0]))
4400                 goto xdr_error;
4401
4402         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4403                 goto xdr_error;
4404         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4405                 goto xdr_error;
4406         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4407                 goto xdr_error;
4408
4409         status = verify_attr_len(xdr, savep, attrlen);
4410 xdr_error:
4411         dprintk("%s: xdr returned %d!\n", __func__, -status);
4412         return status;
4413 }
4414
4415 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4416 {
4417         unsigned int savep;
4418         uint32_t attrlen, bitmap[3] = {0};
4419         int status;
4420
4421         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4422                 goto xdr_error;
4423         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4426                 goto xdr_error;
4427
4428         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4429                 goto xdr_error;
4430         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4431                 goto xdr_error;
4432
4433         status = verify_attr_len(xdr, savep, attrlen);
4434 xdr_error:
4435         dprintk("%s: xdr returned %d!\n", __func__, -status);
4436         return status;
4437 }
4438
4439 static int decode_threshold_hint(struct xdr_stream *xdr,
4440                                   uint32_t *bitmap,
4441                                   uint64_t *res,
4442                                   uint32_t hint_bit)
4443 {
4444         __be32 *p;
4445
4446         *res = 0;
4447         if (likely(bitmap[0] & hint_bit)) {
4448                 p = xdr_inline_decode(xdr, 8);
4449                 if (unlikely(!p))
4450                         goto out_overflow;
4451                 xdr_decode_hyper(p, res);
4452         }
4453         return 0;
4454 out_overflow:
4455         print_overflow_msg(__func__, xdr);
4456         return -EIO;
4457 }
4458
4459 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4460                                         struct nfs4_threshold *res)
4461 {
4462         __be32 *p;
4463         unsigned int savep;
4464         uint32_t bitmap[3] = {0,}, attrlen;
4465         int status;
4466
4467         /* layout type */
4468         p = xdr_inline_decode(xdr, 4);
4469         if (unlikely(!p)) {
4470                 print_overflow_msg(__func__, xdr);
4471                 return -EIO;
4472         }
4473         res->l_type = be32_to_cpup(p);
4474
4475         /* thi_hintset bitmap */
4476         status = decode_attr_bitmap(xdr, bitmap);
4477         if (status < 0)
4478                 goto xdr_error;
4479
4480         /* thi_hintlist length */
4481         status = decode_attr_length(xdr, &attrlen, &savep);
4482         if (status < 0)
4483                 goto xdr_error;
4484         /* thi_hintlist */
4485         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4486         if (status < 0)
4487                 goto xdr_error;
4488         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4489         if (status < 0)
4490                 goto xdr_error;
4491         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4492                                        THRESHOLD_RD_IO);
4493         if (status < 0)
4494                 goto xdr_error;
4495         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4496                                        THRESHOLD_WR_IO);
4497         if (status < 0)
4498                 goto xdr_error;
4499
4500         status = verify_attr_len(xdr, savep, attrlen);
4501         res->bm = bitmap[0];
4502
4503         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4504                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4505                 res->wr_io_sz);
4506 xdr_error:
4507         dprintk("%s ret=%d!\n", __func__, status);
4508         return status;
4509 }
4510
4511 /*
4512  * Thresholds on pNFS direct I/O vrs MDS I/O
4513  */
4514 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4515                                     uint32_t *bitmap,
4516                                     struct nfs4_threshold *res)
4517 {
4518         __be32 *p;
4519         int status = 0;
4520         uint32_t num;
4521
4522         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4523                 return -EIO;
4524         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4525                 /* Did the server return an unrequested attribute? */
4526                 if (unlikely(res == NULL))
4527                         return -EREMOTEIO;
4528                 p = xdr_inline_decode(xdr, 4);
4529                 if (unlikely(!p))
4530                         goto out_overflow;
4531                 num = be32_to_cpup(p);
4532                 if (num == 0)
4533                         return 0;
4534                 if (num > 1)
4535                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4536                                 "drivers per filesystem not supported\n",
4537                                 __func__);
4538
4539                 status = decode_first_threshold_item4(xdr, res);
4540                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4541         }
4542         return status;
4543 out_overflow:
4544         print_overflow_msg(__func__, xdr);
4545         return -EIO;
4546 }
4547
4548 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4549                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4550                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4551                 const struct nfs_server *server)
4552 {
4553         int status;
4554         umode_t fmode = 0;
4555         uint32_t type;
4556         int32_t err;
4557
4558         status = decode_attr_type(xdr, bitmap, &type);
4559         if (status < 0)
4560                 goto xdr_error;
4561         fattr->mode = 0;
4562         if (status != 0) {
4563                 fattr->mode |= nfs_type2fmt[type];
4564                 fattr->valid |= status;
4565         }
4566
4567         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4568         if (status < 0)
4569                 goto xdr_error;
4570         fattr->valid |= status;
4571
4572         status = decode_attr_size(xdr, bitmap, &fattr->size);
4573         if (status < 0)
4574                 goto xdr_error;
4575         fattr->valid |= status;
4576
4577         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4578         if (status < 0)
4579                 goto xdr_error;
4580         fattr->valid |= status;
4581
4582         err = 0;
4583         status = decode_attr_error(xdr, bitmap, &err);
4584         if (status < 0)
4585                 goto xdr_error;
4586
4587         status = decode_attr_filehandle(xdr, bitmap, fh);
4588         if (status < 0)
4589                 goto xdr_error;
4590
4591         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4592         if (status < 0)
4593                 goto xdr_error;
4594         fattr->valid |= status;
4595
4596         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->valid |= status;
4600
4601         status = -EIO;
4602         if (unlikely(bitmap[0]))
4603                 goto xdr_error;
4604
4605         status = decode_attr_mode(xdr, bitmap, &fmode);
4606         if (status < 0)
4607                 goto xdr_error;
4608         if (status != 0) {
4609                 fattr->mode |= fmode;
4610                 fattr->valid |= status;
4611         }
4612
4613         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4614         if (status < 0)
4615                 goto xdr_error;
4616         fattr->valid |= status;
4617
4618         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4619         if (status < 0)
4620                 goto xdr_error;
4621         fattr->valid |= status;
4622
4623         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4624         if (status < 0)
4625                 goto xdr_error;
4626         fattr->valid |= status;
4627
4628         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4629         if (status < 0)
4630                 goto xdr_error;
4631         fattr->valid |= status;
4632
4633         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4634         if (status < 0)
4635                 goto xdr_error;
4636         fattr->valid |= status;
4637
4638         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4639         if (status < 0)
4640                 goto xdr_error;
4641         fattr->valid |= status;
4642
4643         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4644         if (status < 0)
4645                 goto xdr_error;
4646         fattr->valid |= status;
4647
4648         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4649         if (status < 0)
4650                 goto xdr_error;
4651         fattr->valid |= status;
4652
4653         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657
4658         status = -EIO;
4659         if (unlikely(bitmap[1]))
4660                 goto xdr_error;
4661
4662         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4663         if (status < 0)
4664                 goto xdr_error;
4665
4666         if (label) {
4667                 status = decode_attr_security_label(xdr, bitmap, label);
4668                 if (status < 0)
4669                         goto xdr_error;
4670                 fattr->valid |= status;
4671         }
4672
4673 xdr_error:
4674         dprintk("%s: xdr returned %d\n", __func__, -status);
4675         return status;
4676 }
4677
4678 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4679                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4680                 struct nfs4_label *label, const struct nfs_server *server)
4681 {
4682         unsigned int savep;
4683         uint32_t attrlen,
4684                  bitmap[3] = {0};
4685         int status;
4686
4687         status = decode_op_hdr(xdr, OP_GETATTR);
4688         if (status < 0)
4689                 goto xdr_error;
4690
4691         status = decode_attr_bitmap(xdr, bitmap);
4692         if (status < 0)
4693                 goto xdr_error;
4694
4695         status = decode_attr_length(xdr, &attrlen, &savep);
4696         if (status < 0)
4697                 goto xdr_error;
4698
4699         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4700                                         label, server);
4701         if (status < 0)
4702                 goto xdr_error;
4703
4704         status = verify_attr_len(xdr, savep, attrlen);
4705 xdr_error:
4706         dprintk("%s: xdr returned %d\n", __func__, -status);
4707         return status;
4708 }
4709
4710 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4711                 struct nfs4_label *label, const struct nfs_server *server)
4712 {
4713         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4714 }
4715
4716 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4717                 const struct nfs_server *server)
4718 {
4719         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4720 }
4721
4722 /*
4723  * Decode potentially multiple layout types. Currently we only support
4724  * one layout driver per file system.
4725  */
4726 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4727                                          uint32_t *layouttype)
4728 {
4729         __be32 *p;
4730         int num;
4731
4732         p = xdr_inline_decode(xdr, 4);
4733         if (unlikely(!p))
4734                 goto out_overflow;
4735         num = be32_to_cpup(p);
4736
4737         /* pNFS is not supported by the underlying file system */
4738         if (num == 0) {
4739                 *layouttype = 0;
4740                 return 0;
4741         }
4742         if (num > 1)
4743                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4744                         "drivers per filesystem not supported\n", __func__);
4745
4746         /* Decode and set first layout type, move xdr->p past unused types */
4747         p = xdr_inline_decode(xdr, num * 4);
4748         if (unlikely(!p))
4749                 goto out_overflow;
4750         *layouttype = be32_to_cpup(p);
4751         return 0;
4752 out_overflow:
4753         print_overflow_msg(__func__, xdr);
4754         return -EIO;
4755 }
4756
4757 /*
4758  * The type of file system exported.
4759  * Note we must ensure that layouttype is set in any non-error case.
4760  */
4761 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4762                                 uint32_t *layouttype)
4763 {
4764         int status = 0;
4765
4766         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4767         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4768                 return -EIO;
4769         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4770                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4771                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4772         } else
4773                 *layouttype = 0;
4774         return status;
4775 }
4776
4777 /*
4778  * The prefered block size for layout directed io
4779  */
4780 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4781                                       uint32_t *res)
4782 {
4783         __be32 *p;
4784
4785         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4786         *res = 0;
4787         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4788                 p = xdr_inline_decode(xdr, 4);
4789                 if (unlikely(!p)) {
4790                         print_overflow_msg(__func__, xdr);
4791                         return -EIO;
4792                 }
4793                 *res = be32_to_cpup(p);
4794                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4795         }
4796         return 0;
4797 }
4798
4799 /*
4800  * The granularity of a CLONE operation.
4801  */
4802 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4803                                      uint32_t *res)
4804 {
4805         __be32 *p;
4806
4807         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4808         *res = 0;
4809         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4810                 p = xdr_inline_decode(xdr, 4);
4811                 if (unlikely(!p)) {
4812                         print_overflow_msg(__func__, xdr);
4813                         return -EIO;
4814                 }
4815                 *res = be32_to_cpup(p);
4816                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4817         }
4818         return 0;
4819 }
4820
4821 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4822 {
4823         unsigned int savep;
4824         uint32_t attrlen, bitmap[3];
4825         int status;
4826
4827         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4828                 goto xdr_error;
4829         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4830                 goto xdr_error;
4831         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4832                 goto xdr_error;
4833
4834         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4835
4836         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4837                 goto xdr_error;
4838         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4839                 goto xdr_error;
4840         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4841                 goto xdr_error;
4842         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4843         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4844                 goto xdr_error;
4845         fsinfo->wtpref = fsinfo->wtmax;
4846
4847         status = -EIO;
4848         if (unlikely(bitmap[0]))
4849                 goto xdr_error;
4850
4851         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4852         if (status != 0)
4853                 goto xdr_error;
4854         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4855         if (status != 0)
4856                 goto xdr_error;
4857
4858         status = -EIO;
4859         if (unlikely(bitmap[1]))
4860                 goto xdr_error;
4861
4862         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4863         if (status)
4864                 goto xdr_error;
4865         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4866         if (status)
4867                 goto xdr_error;
4868
4869         status = verify_attr_len(xdr, savep, attrlen);
4870 xdr_error:
4871         dprintk("%s: xdr returned %d!\n", __func__, -status);
4872         return status;
4873 }
4874
4875 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4876 {
4877         __be32 *p;
4878         uint32_t len;
4879         int status;
4880
4881         /* Zero handle first to allow comparisons */
4882         memset(fh, 0, sizeof(*fh));
4883
4884         status = decode_op_hdr(xdr, OP_GETFH);
4885         if (status)
4886                 return status;
4887
4888         p = xdr_inline_decode(xdr, 4);
4889         if (unlikely(!p))
4890                 goto out_overflow;
4891         len = be32_to_cpup(p);
4892         if (len > NFS4_FHSIZE)
4893                 return -EIO;
4894         fh->size = len;
4895         p = xdr_inline_decode(xdr, len);
4896         if (unlikely(!p))
4897                 goto out_overflow;
4898         memcpy(fh->data, p, len);
4899         return 0;
4900 out_overflow:
4901         print_overflow_msg(__func__, xdr);
4902         return -EIO;
4903 }
4904
4905 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4906 {
4907         int status;
4908
4909         status = decode_op_hdr(xdr, OP_LINK);
4910         if (status)
4911                 return status;
4912         return decode_change_info(xdr, cinfo);
4913 }
4914
4915 /*
4916  * We create the owner, so we know a proper owner.id length is 4.
4917  */
4918 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4919 {
4920         uint64_t offset, length, clientid;
4921         __be32 *p;
4922         uint32_t namelen, type;
4923
4924         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4925         if (unlikely(!p))
4926                 goto out_overflow;
4927         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4928         p = xdr_decode_hyper(p, &length);
4929         type = be32_to_cpup(p++); /* 4 byte read */
4930         if (fl != NULL) { /* manipulate file lock */
4931                 fl->fl_start = (loff_t)offset;
4932                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4933                 if (length == ~(uint64_t)0)
4934                         fl->fl_end = OFFSET_MAX;
4935                 fl->fl_type = F_WRLCK;
4936                 if (type & 1)
4937                         fl->fl_type = F_RDLCK;
4938                 fl->fl_pid = 0;
4939         }
4940         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4941         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4942         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4943         if (likely(p))
4944                 return -NFS4ERR_DENIED;
4945 out_overflow:
4946         print_overflow_msg(__func__, xdr);
4947         return -EIO;
4948 }
4949
4950 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4951 {
4952         int status;
4953
4954         status = decode_op_hdr(xdr, OP_LOCK);
4955         if (status == -EIO)
4956                 goto out;
4957         if (status == 0) {
4958                 status = decode_lock_stateid(xdr, &res->stateid);
4959                 if (unlikely(status))
4960                         goto out;
4961         } else if (status == -NFS4ERR_DENIED)
4962                 status = decode_lock_denied(xdr, NULL);
4963         if (res->open_seqid != NULL)
4964                 nfs_increment_open_seqid(status, res->open_seqid);
4965         nfs_increment_lock_seqid(status, res->lock_seqid);
4966 out:
4967         return status;
4968 }
4969
4970 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4971 {
4972         int status;
4973         status = decode_op_hdr(xdr, OP_LOCKT);
4974         if (status == -NFS4ERR_DENIED)
4975                 return decode_lock_denied(xdr, res->denied);
4976         return status;
4977 }
4978
4979 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4980 {
4981         int status;
4982
4983         status = decode_op_hdr(xdr, OP_LOCKU);
4984         if (status != -EIO)
4985                 nfs_increment_lock_seqid(status, res->seqid);
4986         if (status == 0)
4987                 status = decode_lock_stateid(xdr, &res->stateid);
4988         return status;
4989 }
4990
4991 static int decode_release_lockowner(struct xdr_stream *xdr)
4992 {
4993         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4994 }
4995
4996 static int decode_lookup(struct xdr_stream *xdr)
4997 {
4998         return decode_op_hdr(xdr, OP_LOOKUP);
4999 }
5000
5001 /* This is too sick! */
5002 static int decode_space_limit(struct xdr_stream *xdr,
5003                 unsigned long *pagemod_limit)
5004 {
5005         __be32 *p;
5006         uint32_t limit_type, nblocks, blocksize;
5007         u64 maxsize = 0;
5008
5009         p = xdr_inline_decode(xdr, 12);
5010         if (unlikely(!p))
5011                 goto out_overflow;
5012         limit_type = be32_to_cpup(p++);
5013         switch (limit_type) {
5014         case NFS4_LIMIT_SIZE:
5015                 xdr_decode_hyper(p, &maxsize);
5016                 break;
5017         case NFS4_LIMIT_BLOCKS:
5018                 nblocks = be32_to_cpup(p++);
5019                 blocksize = be32_to_cpup(p);
5020                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5021         }
5022         maxsize >>= PAGE_SHIFT;
5023         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5024         return 0;
5025 out_overflow:
5026         print_overflow_msg(__func__, xdr);
5027         return -EIO;
5028 }
5029
5030 static int decode_rw_delegation(struct xdr_stream *xdr,
5031                 uint32_t delegation_type,
5032                 struct nfs_openres *res)
5033 {
5034         __be32 *p;
5035         int status;
5036
5037         status = decode_delegation_stateid(xdr, &res->delegation);
5038         if (unlikely(status))
5039                 return status;
5040         p = xdr_inline_decode(xdr, 4);
5041         if (unlikely(!p))
5042                 goto out_overflow;
5043         res->do_recall = be32_to_cpup(p);
5044
5045         switch (delegation_type) {
5046         case NFS4_OPEN_DELEGATE_READ:
5047                 res->delegation_type = FMODE_READ;
5048                 break;
5049         case NFS4_OPEN_DELEGATE_WRITE:
5050                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5051                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5052                                 return -EIO;
5053         }
5054         return decode_ace(xdr, NULL, res->server->nfs_client);
5055 out_overflow:
5056         print_overflow_msg(__func__, xdr);
5057         return -EIO;
5058 }
5059
5060 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5061 {
5062         __be32 *p;
5063         uint32_t why_no_delegation;
5064
5065         p = xdr_inline_decode(xdr, 4);
5066         if (unlikely(!p))
5067                 goto out_overflow;
5068         why_no_delegation = be32_to_cpup(p);
5069         switch (why_no_delegation) {
5070                 case WND4_CONTENTION:
5071                 case WND4_RESOURCE:
5072                         xdr_inline_decode(xdr, 4);
5073                         /* Ignore for now */
5074         }
5075         return 0;
5076 out_overflow:
5077         print_overflow_msg(__func__, xdr);
5078         return -EIO;
5079 }
5080
5081 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5082 {
5083         __be32 *p;
5084         uint32_t delegation_type;
5085
5086         p = xdr_inline_decode(xdr, 4);
5087         if (unlikely(!p))
5088                 goto out_overflow;
5089         delegation_type = be32_to_cpup(p);
5090         res->delegation_type = 0;
5091         switch (delegation_type) {
5092         case NFS4_OPEN_DELEGATE_NONE:
5093                 return 0;
5094         case NFS4_OPEN_DELEGATE_READ:
5095         case NFS4_OPEN_DELEGATE_WRITE:
5096                 return decode_rw_delegation(xdr, delegation_type, res);
5097         case NFS4_OPEN_DELEGATE_NONE_EXT:
5098                 return decode_no_delegation(xdr, res);
5099         }
5100         return -EIO;
5101 out_overflow:
5102         print_overflow_msg(__func__, xdr);
5103         return -EIO;
5104 }
5105
5106 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5107 {
5108         __be32 *p;
5109         uint32_t savewords, bmlen, i;
5110         int status;
5111
5112         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5113                 return status;
5114         nfs_increment_open_seqid(status, res->seqid);
5115         if (status)
5116                 return status;
5117         status = decode_open_stateid(xdr, &res->stateid);
5118         if (unlikely(status))
5119                 return status;
5120
5121         decode_change_info(xdr, &res->cinfo);
5122
5123         p = xdr_inline_decode(xdr, 8);
5124         if (unlikely(!p))
5125                 goto out_overflow;
5126         res->rflags = be32_to_cpup(p++);
5127         bmlen = be32_to_cpup(p);
5128         if (bmlen > 10)
5129                 goto xdr_error;
5130
5131         p = xdr_inline_decode(xdr, bmlen << 2);
5132         if (unlikely(!p))
5133                 goto out_overflow;
5134         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5135         for (i = 0; i < savewords; ++i)
5136                 res->attrset[i] = be32_to_cpup(p++);
5137         for (; i < NFS4_BITMAP_SIZE; i++)
5138                 res->attrset[i] = 0;
5139
5140         return decode_delegation(xdr, res);
5141 xdr_error:
5142         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5143         return -EIO;
5144 out_overflow:
5145         print_overflow_msg(__func__, xdr);
5146         return -EIO;
5147 }
5148
5149 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5150 {
5151         int status;
5152
5153         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5154         if (status != -EIO)
5155                 nfs_increment_open_seqid(status, res->seqid);
5156         if (!status)
5157                 status = decode_open_stateid(xdr, &res->stateid);
5158         return status;
5159 }
5160
5161 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5162 {
5163         int status;
5164
5165         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5166         if (status != -EIO)
5167                 nfs_increment_open_seqid(status, res->seqid);
5168         if (!status)
5169                 status = decode_open_stateid(xdr, &res->stateid);
5170         return status;
5171 }
5172
5173 static int decode_putfh(struct xdr_stream *xdr)
5174 {
5175         return decode_op_hdr(xdr, OP_PUTFH);
5176 }
5177
5178 static int decode_putrootfh(struct xdr_stream *xdr)
5179 {
5180         return decode_op_hdr(xdr, OP_PUTROOTFH);
5181 }
5182
5183 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5184                        struct nfs_pgio_res *res)
5185 {
5186         __be32 *p;
5187         uint32_t count, eof, recvd;
5188         int status;
5189
5190         status = decode_op_hdr(xdr, OP_READ);
5191         if (status)
5192                 return status;
5193         p = xdr_inline_decode(xdr, 8);
5194         if (unlikely(!p))
5195                 goto out_overflow;
5196         eof = be32_to_cpup(p++);
5197         count = be32_to_cpup(p);
5198         recvd = xdr_read_pages(xdr, count);
5199         if (count > recvd) {
5200                 dprintk("NFS: server cheating in read reply: "
5201                                 "count %u > recvd %u\n", count, recvd);
5202                 count = recvd;
5203                 eof = 0;
5204         }
5205         res->eof = eof;
5206         res->count = count;
5207         return 0;
5208 out_overflow:
5209         print_overflow_msg(__func__, xdr);
5210         return -EIO;
5211 }
5212
5213 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5214 {
5215         int             status;
5216         __be32          verf[2];
5217
5218         status = decode_op_hdr(xdr, OP_READDIR);
5219         if (!status)
5220                 status = decode_verifier(xdr, readdir->verifier.data);
5221         if (unlikely(status))
5222                 return status;
5223         memcpy(verf, readdir->verifier.data, sizeof(verf));
5224         dprintk("%s: verifier = %08x:%08x\n",
5225                         __func__, verf[0], verf[1]);
5226         return xdr_read_pages(xdr, xdr->buf->page_len);
5227 }
5228
5229 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5230 {
5231         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5232         u32 len, recvd;
5233         __be32 *p;
5234         int status;
5235
5236         status = decode_op_hdr(xdr, OP_READLINK);
5237         if (status)
5238                 return status;
5239
5240         /* Convert length of symlink */
5241         p = xdr_inline_decode(xdr, 4);
5242         if (unlikely(!p))
5243                 goto out_overflow;
5244         len = be32_to_cpup(p);
5245         if (len >= rcvbuf->page_len || len <= 0) {
5246                 dprintk("nfs: server returned giant symlink!\n");
5247                 return -ENAMETOOLONG;
5248         }
5249         recvd = xdr_read_pages(xdr, len);
5250         if (recvd < len) {
5251                 dprintk("NFS: server cheating in readlink reply: "
5252                                 "count %u > recvd %u\n", len, recvd);
5253                 return -EIO;
5254         }
5255         /*
5256          * The XDR encode routine has set things up so that
5257          * the link text will be copied directly into the
5258          * buffer.  We just have to do overflow-checking,
5259          * and and null-terminate the text (the VFS expects
5260          * null-termination).
5261          */
5262         xdr_terminate_string(rcvbuf, len);
5263         return 0;
5264 out_overflow:
5265         print_overflow_msg(__func__, xdr);
5266         return -EIO;
5267 }
5268
5269 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5270 {
5271         int status;
5272
5273         status = decode_op_hdr(xdr, OP_REMOVE);
5274         if (status)
5275                 goto out;
5276         status = decode_change_info(xdr, cinfo);
5277 out:
5278         return status;
5279 }
5280
5281 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5282               struct nfs4_change_info *new_cinfo)
5283 {
5284         int status;
5285
5286         status = decode_op_hdr(xdr, OP_RENAME);
5287         if (status)
5288                 goto out;
5289         if ((status = decode_change_info(xdr, old_cinfo)))
5290                 goto out;
5291         status = decode_change_info(xdr, new_cinfo);
5292 out:
5293         return status;
5294 }
5295
5296 static int decode_renew(struct xdr_stream *xdr)
5297 {
5298         return decode_op_hdr(xdr, OP_RENEW);
5299 }
5300
5301 static int
5302 decode_restorefh(struct xdr_stream *xdr)
5303 {
5304         return decode_op_hdr(xdr, OP_RESTOREFH);
5305 }
5306
5307 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5308                          struct nfs_getaclres *res)
5309 {
5310         unsigned int savep;
5311         uint32_t attrlen,
5312                  bitmap[3] = {0};
5313         int status;
5314         unsigned int pg_offset;
5315
5316         res->acl_len = 0;
5317         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5318                 goto out;
5319
5320         xdr_enter_page(xdr, xdr->buf->page_len);
5321
5322         /* Calculate the offset of the page data */
5323         pg_offset = xdr->buf->head[0].iov_len;
5324
5325         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5326                 goto out;
5327         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5328                 goto out;
5329
5330         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5331                 return -EIO;
5332         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5333
5334                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5335                  * are stored with the acl data to handle the problem of
5336                  * variable length bitmaps.*/
5337                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5338                 res->acl_len = attrlen;
5339
5340                 /* Check for receive buffer overflow */
5341                 if (res->acl_len > (xdr->nwords << 2) ||
5342                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5343                         res->acl_flags |= NFS4_ACL_TRUNC;
5344                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5345                                         attrlen, xdr->nwords << 2);
5346                 }
5347         } else
5348                 status = -EOPNOTSUPP;
5349
5350 out:
5351         return status;
5352 }
5353
5354 static int
5355 decode_savefh(struct xdr_stream *xdr)
5356 {
5357         return decode_op_hdr(xdr, OP_SAVEFH);
5358 }
5359
5360 static int decode_setattr(struct xdr_stream *xdr)
5361 {
5362         __be32 *p;
5363         uint32_t bmlen;
5364         int status;
5365
5366         status = decode_op_hdr(xdr, OP_SETATTR);
5367         if (status)
5368                 return status;
5369         p = xdr_inline_decode(xdr, 4);
5370         if (unlikely(!p))
5371                 goto out_overflow;
5372         bmlen = be32_to_cpup(p);
5373         p = xdr_inline_decode(xdr, bmlen << 2);
5374         if (likely(p))
5375                 return 0;
5376 out_overflow:
5377         print_overflow_msg(__func__, xdr);
5378         return -EIO;
5379 }
5380
5381 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5382 {
5383         __be32 *p;
5384         uint32_t opnum;
5385         int32_t nfserr;
5386
5387         p = xdr_inline_decode(xdr, 8);
5388         if (unlikely(!p))
5389                 goto out_overflow;
5390         opnum = be32_to_cpup(p++);
5391         if (opnum != OP_SETCLIENTID) {
5392                 dprintk("nfs: decode_setclientid: Server returned operation"
5393                         " %d\n", opnum);
5394                 return -EIO;
5395         }
5396         nfserr = be32_to_cpup(p);
5397         if (nfserr == NFS_OK) {
5398                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5399                 if (unlikely(!p))
5400                         goto out_overflow;
5401                 p = xdr_decode_hyper(p, &res->clientid);
5402                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5403         } else if (nfserr == NFSERR_CLID_INUSE) {
5404                 uint32_t len;
5405
5406                 /* skip netid string */
5407                 p = xdr_inline_decode(xdr, 4);
5408                 if (unlikely(!p))
5409                         goto out_overflow;
5410                 len = be32_to_cpup(p);
5411                 p = xdr_inline_decode(xdr, len);
5412                 if (unlikely(!p))
5413                         goto out_overflow;
5414
5415                 /* skip uaddr string */
5416                 p = xdr_inline_decode(xdr, 4);
5417                 if (unlikely(!p))
5418                         goto out_overflow;
5419                 len = be32_to_cpup(p);
5420                 p = xdr_inline_decode(xdr, len);
5421                 if (unlikely(!p))
5422                         goto out_overflow;
5423                 return -NFSERR_CLID_INUSE;
5424         } else
5425                 return nfs4_stat_to_errno(nfserr);
5426
5427         return 0;
5428 out_overflow:
5429         print_overflow_msg(__func__, xdr);
5430         return -EIO;
5431 }
5432
5433 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5434 {
5435         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5436 }
5437
5438 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5439 {
5440         __be32 *p;
5441         int status;
5442
5443         status = decode_op_hdr(xdr, OP_WRITE);
5444         if (status)
5445                 return status;
5446
5447         p = xdr_inline_decode(xdr, 8);
5448         if (unlikely(!p))
5449                 goto out_overflow;
5450         res->count = be32_to_cpup(p++);
5451         res->verf->committed = be32_to_cpup(p++);
5452         return decode_write_verifier(xdr, &res->verf->verifier);
5453 out_overflow:
5454         print_overflow_msg(__func__, xdr);
5455         return -EIO;
5456 }
5457
5458 static int decode_delegreturn(struct xdr_stream *xdr)
5459 {
5460         return decode_op_hdr(xdr, OP_DELEGRETURN);
5461 }
5462
5463 static int decode_secinfo_gss(struct xdr_stream *xdr,
5464                               struct nfs4_secinfo4 *flavor)
5465 {
5466         u32 oid_len;
5467         __be32 *p;
5468
5469         p = xdr_inline_decode(xdr, 4);
5470         if (unlikely(!p))
5471                 goto out_overflow;
5472         oid_len = be32_to_cpup(p);
5473         if (oid_len > GSS_OID_MAX_LEN)
5474                 goto out_err;
5475
5476         p = xdr_inline_decode(xdr, oid_len);
5477         if (unlikely(!p))
5478                 goto out_overflow;
5479         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5480         flavor->flavor_info.oid.len = oid_len;
5481
5482         p = xdr_inline_decode(xdr, 8);
5483         if (unlikely(!p))
5484                 goto out_overflow;
5485         flavor->flavor_info.qop = be32_to_cpup(p++);
5486         flavor->flavor_info.service = be32_to_cpup(p);
5487
5488         return 0;
5489
5490 out_overflow:
5491         print_overflow_msg(__func__, xdr);
5492         return -EIO;
5493 out_err:
5494         return -EINVAL;
5495 }
5496
5497 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5498 {
5499         struct nfs4_secinfo4 *sec_flavor;
5500         unsigned int i, num_flavors;
5501         int status;
5502         __be32 *p;
5503
5504         p = xdr_inline_decode(xdr, 4);
5505         if (unlikely(!p))
5506                 goto out_overflow;
5507
5508         res->flavors->num_flavors = 0;
5509         num_flavors = be32_to_cpup(p);
5510
5511         for (i = 0; i < num_flavors; i++) {
5512                 sec_flavor = &res->flavors->flavors[i];
5513                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5514                         break;
5515
5516                 p = xdr_inline_decode(xdr, 4);
5517                 if (unlikely(!p))
5518                         goto out_overflow;
5519                 sec_flavor->flavor = be32_to_cpup(p);
5520
5521                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5522                         status = decode_secinfo_gss(xdr, sec_flavor);
5523                         if (status)
5524                                 goto out;
5525                 }
5526                 res->flavors->num_flavors++;
5527         }
5528
5529         status = 0;
5530 out:
5531         return status;
5532 out_overflow:
5533         print_overflow_msg(__func__, xdr);
5534         return -EIO;
5535 }
5536
5537 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5538 {
5539         int status = decode_op_hdr(xdr, OP_SECINFO);
5540         if (status)
5541                 return status;
5542         return decode_secinfo_common(xdr, res);
5543 }
5544
5545 #if defined(CONFIG_NFS_V4_1)
5546 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5547 {
5548         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5549         if (status)
5550                 return status;
5551         return decode_secinfo_common(xdr, res);
5552 }
5553
5554 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5555 {
5556         __be32 *p;
5557         uint32_t bitmap_words;
5558         unsigned int i;
5559
5560         p = xdr_inline_decode(xdr, 4);
5561         bitmap_words = be32_to_cpup(p++);
5562         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5563                 return -EIO;
5564         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5565         for (i = 0; i < bitmap_words; i++)
5566                 op_map->u.words[i] = be32_to_cpup(p++);
5567
5568         return 0;
5569 }
5570
5571 static int decode_exchange_id(struct xdr_stream *xdr,
5572                               struct nfs41_exchange_id_res *res)
5573 {
5574         __be32 *p;
5575         uint32_t dummy;
5576         char *dummy_str;
5577         int status;
5578         uint32_t impl_id_count;
5579
5580         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5581         if (status)
5582                 return status;
5583
5584         p = xdr_inline_decode(xdr, 8);
5585         if (unlikely(!p))
5586                 goto out_overflow;
5587         xdr_decode_hyper(p, &res->clientid);
5588         p = xdr_inline_decode(xdr, 12);
5589         if (unlikely(!p))
5590                 goto out_overflow;
5591         res->seqid = be32_to_cpup(p++);
5592         res->flags = be32_to_cpup(p++);
5593
5594         res->state_protect.how = be32_to_cpup(p);
5595         switch (res->state_protect.how) {
5596         case SP4_NONE:
5597                 break;
5598         case SP4_MACH_CRED:
5599                 status = decode_op_map(xdr, &res->state_protect.enforce);
5600                 if (status)
5601                         return status;
5602                 status = decode_op_map(xdr, &res->state_protect.allow);
5603                 if (status)
5604                         return status;
5605                 break;
5606         default:
5607                 WARN_ON_ONCE(1);
5608                 return -EIO;
5609         }
5610
5611         /* server_owner4.so_minor_id */
5612         p = xdr_inline_decode(xdr, 8);
5613         if (unlikely(!p))
5614                 goto out_overflow;
5615         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5616
5617         /* server_owner4.so_major_id */
5618         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5619         if (unlikely(status))
5620                 return status;
5621         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5622                 return -EIO;
5623         memcpy(res->server_owner->major_id, dummy_str, dummy);
5624         res->server_owner->major_id_sz = dummy;
5625
5626         /* server_scope4 */
5627         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5628         if (unlikely(status))
5629                 return status;
5630         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5631                 return -EIO;
5632         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5633         res->server_scope->server_scope_sz = dummy;
5634
5635         /* Implementation Id */
5636         p = xdr_inline_decode(xdr, 4);
5637         if (unlikely(!p))
5638                 goto out_overflow;
5639         impl_id_count = be32_to_cpup(p++);
5640
5641         if (impl_id_count) {
5642                 /* nii_domain */
5643                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5644                 if (unlikely(status))
5645                         return status;
5646                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5647                         return -EIO;
5648                 memcpy(res->impl_id->domain, dummy_str, dummy);
5649
5650                 /* nii_name */
5651                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5652                 if (unlikely(status))
5653                         return status;
5654                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5655                         return -EIO;
5656                 memcpy(res->impl_id->name, dummy_str, dummy);
5657
5658                 /* nii_date */
5659                 p = xdr_inline_decode(xdr, 12);
5660                 if (unlikely(!p))
5661                         goto out_overflow;
5662                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5663                 res->impl_id->date.nseconds = be32_to_cpup(p);
5664
5665                 /* if there's more than one entry, ignore the rest */
5666         }
5667         return 0;
5668 out_overflow:
5669         print_overflow_msg(__func__, xdr);
5670         return -EIO;
5671 }
5672
5673 static int decode_chan_attrs(struct xdr_stream *xdr,
5674                              struct nfs4_channel_attrs *attrs)
5675 {
5676         __be32 *p;
5677         u32 nr_attrs, val;
5678
5679         p = xdr_inline_decode(xdr, 28);
5680         if (unlikely(!p))
5681                 goto out_overflow;
5682         val = be32_to_cpup(p++);        /* headerpadsz */
5683         if (val)
5684                 return -EINVAL;         /* no support for header padding yet */
5685         attrs->max_rqst_sz = be32_to_cpup(p++);
5686         attrs->max_resp_sz = be32_to_cpup(p++);
5687         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5688         attrs->max_ops = be32_to_cpup(p++);
5689         attrs->max_reqs = be32_to_cpup(p++);
5690         nr_attrs = be32_to_cpup(p);
5691         if (unlikely(nr_attrs > 1)) {
5692                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5693                         "count %u\n", __func__, nr_attrs);
5694                 return -EINVAL;
5695         }
5696         if (nr_attrs == 1) {
5697                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5698                 if (unlikely(!p))
5699                         goto out_overflow;
5700         }
5701         return 0;
5702 out_overflow:
5703         print_overflow_msg(__func__, xdr);
5704         return -EIO;
5705 }
5706
5707 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5708 {
5709         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5710 }
5711
5712 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5713                                 struct nfs41_bind_conn_to_session_res *res)
5714 {
5715         __be32 *p;
5716         int status;
5717
5718         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5719         if (!status)
5720                 status = decode_sessionid(xdr, &res->sessionid);
5721         if (unlikely(status))
5722                 return status;
5723
5724         /* dir flags, rdma mode bool */
5725         p = xdr_inline_decode(xdr, 8);
5726         if (unlikely(!p))
5727                 goto out_overflow;
5728
5729         res->dir = be32_to_cpup(p++);
5730         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5731                 return -EIO;
5732         if (be32_to_cpup(p) == 0)
5733                 res->use_conn_in_rdma_mode = false;
5734         else
5735                 res->use_conn_in_rdma_mode = true;
5736
5737         return 0;
5738 out_overflow:
5739         print_overflow_msg(__func__, xdr);
5740         return -EIO;
5741 }
5742
5743 static int decode_create_session(struct xdr_stream *xdr,
5744                                  struct nfs41_create_session_res *res)
5745 {
5746         __be32 *p;
5747         int status;
5748
5749         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5750         if (!status)
5751                 status = decode_sessionid(xdr, &res->sessionid);
5752         if (unlikely(status))
5753                 return status;
5754
5755         /* seqid, flags */
5756         p = xdr_inline_decode(xdr, 8);
5757         if (unlikely(!p))
5758                 goto out_overflow;
5759         res->seqid = be32_to_cpup(p++);
5760         res->flags = be32_to_cpup(p);
5761
5762         /* Channel attributes */
5763         status = decode_chan_attrs(xdr, &res->fc_attrs);
5764         if (!status)
5765                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5766         return status;
5767 out_overflow:
5768         print_overflow_msg(__func__, xdr);
5769         return -EIO;
5770 }
5771
5772 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5773 {
5774         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5775 }
5776
5777 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5778 {
5779         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5780 }
5781
5782 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5783 {
5784         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5785 }
5786 #endif /* CONFIG_NFS_V4_1 */
5787
5788 static int decode_sequence(struct xdr_stream *xdr,
5789                            struct nfs4_sequence_res *res,
5790                            struct rpc_rqst *rqstp)
5791 {
5792 #if defined(CONFIG_NFS_V4_1)
5793         struct nfs4_session *session;
5794         struct nfs4_sessionid id;
5795         u32 dummy;
5796         int status;
5797         __be32 *p;
5798
5799         if (res->sr_slot == NULL)
5800                 return 0;
5801         if (!res->sr_slot->table->session)
5802                 return 0;
5803
5804         status = decode_op_hdr(xdr, OP_SEQUENCE);
5805         if (!status)
5806                 status = decode_sessionid(xdr, &id);
5807         if (unlikely(status))
5808                 goto out_err;
5809
5810         /*
5811          * If the server returns different values for sessionID, slotID or
5812          * sequence number, the server is looney tunes.
5813          */
5814         status = -EREMOTEIO;
5815         session = res->sr_slot->table->session;
5816
5817         if (memcmp(id.data, session->sess_id.data,
5818                    NFS4_MAX_SESSIONID_LEN)) {
5819                 dprintk("%s Invalid session id\n", __func__);
5820                 goto out_err;
5821         }
5822
5823         p = xdr_inline_decode(xdr, 20);
5824         if (unlikely(!p))
5825                 goto out_overflow;
5826
5827         /* seqid */
5828         dummy = be32_to_cpup(p++);
5829         if (dummy != res->sr_slot->seq_nr) {
5830                 dprintk("%s Invalid sequence number\n", __func__);
5831                 goto out_err;
5832         }
5833         /* slot id */
5834         dummy = be32_to_cpup(p++);
5835         if (dummy != res->sr_slot->slot_nr) {
5836                 dprintk("%s Invalid slot id\n", __func__);
5837                 goto out_err;
5838         }
5839         /* highest slot id */
5840         res->sr_highest_slotid = be32_to_cpup(p++);
5841         /* target highest slot id */
5842         res->sr_target_highest_slotid = be32_to_cpup(p++);
5843         /* result flags */
5844         res->sr_status_flags = be32_to_cpup(p);
5845         status = 0;
5846 out_err:
5847         res->sr_status = status;
5848         return status;
5849 out_overflow:
5850         print_overflow_msg(__func__, xdr);
5851         status = -EIO;
5852         goto out_err;
5853 #else  /* CONFIG_NFS_V4_1 */
5854         return 0;
5855 #endif /* CONFIG_NFS_V4_1 */
5856 }
5857
5858 #if defined(CONFIG_NFS_V4_1)
5859 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5860 {
5861         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5862         return decode_stateid(xdr, stateid);
5863 }
5864
5865 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5866                                 struct nfs4_getdeviceinfo_res *res)
5867 {
5868         struct pnfs_device *pdev = res->pdev;
5869         __be32 *p;
5870         uint32_t len, type;
5871         int status;
5872
5873         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5874         if (status) {
5875                 if (status == -ETOOSMALL) {
5876                         p = xdr_inline_decode(xdr, 4);
5877                         if (unlikely(!p))
5878                                 goto out_overflow;
5879                         pdev->mincount = be32_to_cpup(p);
5880                         dprintk("%s: Min count too small. mincnt = %u\n",
5881                                 __func__, pdev->mincount);
5882                 }
5883                 return status;
5884         }
5885
5886         p = xdr_inline_decode(xdr, 8);
5887         if (unlikely(!p))
5888                 goto out_overflow;
5889         type = be32_to_cpup(p++);
5890         if (type != pdev->layout_type) {
5891                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5892                         __func__, pdev->layout_type, type);
5893                 return -EINVAL;
5894         }
5895         /*
5896          * Get the length of the opaque device_addr4. xdr_read_pages places
5897          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5898          * and places the remaining xdr data in xdr_buf->tail
5899          */
5900         pdev->mincount = be32_to_cpup(p);
5901         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5902                 goto out_overflow;
5903
5904         /* Parse notification bitmap, verifying that it is zero. */
5905         p = xdr_inline_decode(xdr, 4);
5906         if (unlikely(!p))
5907                 goto out_overflow;
5908         len = be32_to_cpup(p);
5909         if (len) {
5910                 uint32_t i;
5911
5912                 p = xdr_inline_decode(xdr, 4 * len);
5913                 if (unlikely(!p))
5914                         goto out_overflow;
5915
5916                 res->notification = be32_to_cpup(p++);
5917                 for (i = 1; i < len; i++) {
5918                         if (be32_to_cpup(p++)) {
5919                                 dprintk("%s: unsupported notification\n",
5920                                         __func__);
5921                                 return -EIO;
5922                         }
5923                 }
5924         }
5925         return 0;
5926 out_overflow:
5927         print_overflow_msg(__func__, xdr);
5928         return -EIO;
5929 }
5930
5931 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5932                             struct nfs4_layoutget_res *res)
5933 {
5934         __be32 *p;
5935         int status;
5936         u32 layout_count;
5937         u32 recvd;
5938
5939         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5940         if (status)
5941                 return status;
5942         p = xdr_inline_decode(xdr, 4);
5943         if (unlikely(!p))
5944                 goto out_overflow;
5945         res->return_on_close = be32_to_cpup(p);
5946         decode_layout_stateid(xdr, &res->stateid);
5947         p = xdr_inline_decode(xdr, 4);
5948         if (unlikely(!p))
5949                 goto out_overflow;
5950         layout_count = be32_to_cpup(p);
5951         if (!layout_count) {
5952                 dprintk("%s: server responded with empty layout array\n",
5953                         __func__);
5954                 return -EINVAL;
5955         }
5956
5957         p = xdr_inline_decode(xdr, 28);
5958         if (unlikely(!p))
5959                 goto out_overflow;
5960         p = xdr_decode_hyper(p, &res->range.offset);
5961         p = xdr_decode_hyper(p, &res->range.length);
5962         res->range.iomode = be32_to_cpup(p++);
5963         res->type = be32_to_cpup(p++);
5964         res->layoutp->len = be32_to_cpup(p);
5965
5966         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5967                 __func__,
5968                 (unsigned long)res->range.offset,
5969                 (unsigned long)res->range.length,
5970                 res->range.iomode,
5971                 res->type,
5972                 res->layoutp->len);
5973
5974         recvd = xdr_read_pages(xdr, res->layoutp->len);
5975         if (res->layoutp->len > recvd) {
5976                 dprintk("NFS: server cheating in layoutget reply: "
5977                                 "layout len %u > recvd %u\n",
5978                                 res->layoutp->len, recvd);
5979                 return -EINVAL;
5980         }
5981
5982         if (layout_count > 1) {
5983                 /* We only handle a length one array at the moment.  Any
5984                  * further entries are just ignored.  Note that this means
5985                  * the client may see a response that is less than the
5986                  * minimum it requested.
5987                  */
5988                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5989                         __func__, layout_count);
5990         }
5991
5992         return 0;
5993 out_overflow:
5994         print_overflow_msg(__func__, xdr);
5995         return -EIO;
5996 }
5997
5998 static int decode_layoutreturn(struct xdr_stream *xdr,
5999                                struct nfs4_layoutreturn_res *res)
6000 {
6001         __be32 *p;
6002         int status;
6003
6004         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6005         if (status)
6006                 return status;
6007         p = xdr_inline_decode(xdr, 4);
6008         if (unlikely(!p))
6009                 goto out_overflow;
6010         res->lrs_present = be32_to_cpup(p);
6011         if (res->lrs_present)
6012                 status = decode_layout_stateid(xdr, &res->stateid);
6013         return status;
6014 out_overflow:
6015         print_overflow_msg(__func__, xdr);
6016         return -EIO;
6017 }
6018
6019 static int decode_layoutcommit(struct xdr_stream *xdr,
6020                                struct rpc_rqst *req,
6021                                struct nfs4_layoutcommit_res *res)
6022 {
6023         __be32 *p;
6024         __u32 sizechanged;
6025         int status;
6026
6027         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6028         res->status = status;
6029         if (status)
6030                 return status;
6031
6032         p = xdr_inline_decode(xdr, 4);
6033         if (unlikely(!p))
6034                 goto out_overflow;
6035         sizechanged = be32_to_cpup(p);
6036
6037         if (sizechanged) {
6038                 /* throw away new size */
6039                 p = xdr_inline_decode(xdr, 8);
6040                 if (unlikely(!p))
6041                         goto out_overflow;
6042         }
6043         return 0;
6044 out_overflow:
6045         print_overflow_msg(__func__, xdr);
6046         return -EIO;
6047 }
6048
6049 static int decode_test_stateid(struct xdr_stream *xdr,
6050                                struct nfs41_test_stateid_res *res)
6051 {
6052         __be32 *p;
6053         int status;
6054         int num_res;
6055
6056         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6057         if (status)
6058                 return status;
6059
6060         p = xdr_inline_decode(xdr, 4);
6061         if (unlikely(!p))
6062                 goto out_overflow;
6063         num_res = be32_to_cpup(p++);
6064         if (num_res != 1)
6065                 goto out;
6066
6067         p = xdr_inline_decode(xdr, 4);
6068         if (unlikely(!p))
6069                 goto out_overflow;
6070         res->status = be32_to_cpup(p++);
6071
6072         return status;
6073 out_overflow:
6074         print_overflow_msg(__func__, xdr);
6075 out:
6076         return -EIO;
6077 }
6078
6079 static int decode_free_stateid(struct xdr_stream *xdr,
6080                                struct nfs41_free_stateid_res *res)
6081 {
6082         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6083         return res->status;
6084 }
6085 #endif /* CONFIG_NFS_V4_1 */
6086
6087 /*
6088  * END OF "GENERIC" DECODE ROUTINES.
6089  */
6090
6091 /*
6092  * Decode OPEN_DOWNGRADE response
6093  */
6094 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6095                                        struct xdr_stream *xdr,
6096                                        struct nfs_closeres *res)
6097 {
6098         struct compound_hdr hdr;
6099         int status;
6100
6101         status = decode_compound_hdr(xdr, &hdr);
6102         if (status)
6103                 goto out;
6104         status = decode_sequence(xdr, &res->seq_res, rqstp);
6105         if (status)
6106                 goto out;
6107         status = decode_putfh(xdr);
6108         if (status)
6109                 goto out;
6110         status = decode_open_downgrade(xdr, res);
6111         if (status != 0)
6112                 goto out;
6113         decode_getfattr(xdr, res->fattr, res->server);
6114 out:
6115         return status;
6116 }
6117
6118 /*
6119  * Decode ACCESS response
6120  */
6121 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6122                                struct nfs4_accessres *res)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (status)
6129                 goto out;
6130         status = decode_sequence(xdr, &res->seq_res, rqstp);
6131         if (status)
6132                 goto out;
6133         status = decode_putfh(xdr);
6134         if (status != 0)
6135                 goto out;
6136         status = decode_access(xdr, &res->supported, &res->access);
6137         if (status != 0)
6138                 goto out;
6139         decode_getfattr(xdr, res->fattr, res->server);
6140 out:
6141         return status;
6142 }
6143
6144 /*
6145  * Decode LOOKUP response
6146  */
6147 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6148                                struct nfs4_lookup_res *res)
6149 {
6150         struct compound_hdr hdr;
6151         int status;
6152
6153         status = decode_compound_hdr(xdr, &hdr);
6154         if (status)
6155                 goto out;
6156         status = decode_sequence(xdr, &res->seq_res, rqstp);
6157         if (status)
6158                 goto out;
6159         status = decode_putfh(xdr);
6160         if (status)
6161                 goto out;
6162         status = decode_lookup(xdr);
6163         if (status)
6164                 goto out;
6165         status = decode_getfh(xdr, res->fh);
6166         if (status)
6167                 goto out;
6168         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6169 out:
6170         return status;
6171 }
6172
6173 /*
6174  * Decode LOOKUP_ROOT response
6175  */
6176 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6177                                     struct xdr_stream *xdr,
6178                                     struct nfs4_lookup_res *res)
6179 {
6180         struct compound_hdr hdr;
6181         int status;
6182
6183         status = decode_compound_hdr(xdr, &hdr);
6184         if (status)
6185                 goto out;
6186         status = decode_sequence(xdr, &res->seq_res, rqstp);
6187         if (status)
6188                 goto out;
6189         status = decode_putrootfh(xdr);
6190         if (status)
6191                 goto out;
6192         status = decode_getfh(xdr, res->fh);
6193         if (status == 0)
6194                 status = decode_getfattr_label(xdr, res->fattr,
6195                                                 res->label, res->server);
6196 out:
6197         return status;
6198 }
6199
6200 /*
6201  * Decode REMOVE response
6202  */
6203 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6204                                struct nfs_removeres *res)
6205 {
6206         struct compound_hdr hdr;
6207         int status;
6208
6209         status = decode_compound_hdr(xdr, &hdr);
6210         if (status)
6211                 goto out;
6212         status = decode_sequence(xdr, &res->seq_res, rqstp);
6213         if (status)
6214                 goto out;
6215         status = decode_putfh(xdr);
6216         if (status)
6217                 goto out;
6218         status = decode_remove(xdr, &res->cinfo);
6219 out:
6220         return status;
6221 }
6222
6223 /*
6224  * Decode RENAME response
6225  */
6226 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227                                struct nfs_renameres *res)
6228 {
6229         struct compound_hdr hdr;
6230         int status;
6231
6232         status = decode_compound_hdr(xdr, &hdr);
6233         if (status)
6234                 goto out;
6235         status = decode_sequence(xdr, &res->seq_res, rqstp);
6236         if (status)
6237                 goto out;
6238         status = decode_putfh(xdr);
6239         if (status)
6240                 goto out;
6241         status = decode_savefh(xdr);
6242         if (status)
6243                 goto out;
6244         status = decode_putfh(xdr);
6245         if (status)
6246                 goto out;
6247         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode LINK response
6254  */
6255 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256                              struct nfs4_link_res *res)
6257 {
6258         struct compound_hdr hdr;
6259         int status;
6260
6261         status = decode_compound_hdr(xdr, &hdr);
6262         if (status)
6263                 goto out;
6264         status = decode_sequence(xdr, &res->seq_res, rqstp);
6265         if (status)
6266                 goto out;
6267         status = decode_putfh(xdr);
6268         if (status)
6269                 goto out;
6270         status = decode_savefh(xdr);
6271         if (status)
6272                 goto out;
6273         status = decode_putfh(xdr);
6274         if (status)
6275                 goto out;
6276         status = decode_link(xdr, &res->cinfo);
6277         if (status)
6278                 goto out;
6279         /*
6280          * Note order: OP_LINK leaves the directory as the current
6281          *             filehandle.
6282          */
6283         status = decode_restorefh(xdr);
6284         if (status)
6285                 goto out;
6286         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6287 out:
6288         return status;
6289 }
6290
6291 /*
6292  * Decode CREATE response
6293  */
6294 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6295                                struct nfs4_create_res *res)
6296 {
6297         struct compound_hdr hdr;
6298         int status;
6299
6300         status = decode_compound_hdr(xdr, &hdr);
6301         if (status)
6302                 goto out;
6303         status = decode_sequence(xdr, &res->seq_res, rqstp);
6304         if (status)
6305                 goto out;
6306         status = decode_putfh(xdr);
6307         if (status)
6308                 goto out;
6309         status = decode_create(xdr, &res->dir_cinfo);
6310         if (status)
6311                 goto out;
6312         status = decode_getfh(xdr, res->fh);
6313         if (status)
6314                 goto out;
6315         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Decode SYMLINK response
6322  */
6323 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                                 struct nfs4_create_res *res)
6325 {
6326         return nfs4_xdr_dec_create(rqstp, xdr, res);
6327 }
6328
6329 /*
6330  * Decode GETATTR response
6331  */
6332 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6333                                 struct nfs4_getattr_res *res)
6334 {
6335         struct compound_hdr hdr;
6336         int status;
6337
6338         status = decode_compound_hdr(xdr, &hdr);
6339         if (status)
6340                 goto out;
6341         status = decode_sequence(xdr, &res->seq_res, rqstp);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6348 out:
6349         return status;
6350 }
6351
6352 /*
6353  * Encode an SETACL request
6354  */
6355 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6356                                 struct nfs_setaclargs *args)
6357 {
6358         struct compound_hdr hdr = {
6359                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6360         };
6361
6362         encode_compound_hdr(xdr, req, &hdr);
6363         encode_sequence(xdr, &args->seq_args, &hdr);
6364         encode_putfh(xdr, args->fh, &hdr);
6365         encode_setacl(xdr, args, &hdr);
6366         encode_nops(&hdr);
6367 }
6368
6369 /*
6370  * Decode SETACL response
6371  */
6372 static int
6373 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374                     struct nfs_setaclres *res)
6375 {
6376         struct compound_hdr hdr;
6377         int status;
6378
6379         status = decode_compound_hdr(xdr, &hdr);
6380         if (status)
6381                 goto out;
6382         status = decode_sequence(xdr, &res->seq_res, rqstp);
6383         if (status)
6384                 goto out;
6385         status = decode_putfh(xdr);
6386         if (status)
6387                 goto out;
6388         status = decode_setattr(xdr);
6389 out:
6390         return status;
6391 }
6392
6393 /*
6394  * Decode GETACL response
6395  */
6396 static int
6397 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6398                     struct nfs_getaclres *res)
6399 {
6400         struct compound_hdr hdr;
6401         int status;
6402
6403         if (res->acl_scratch != NULL) {
6404                 void *p = page_address(res->acl_scratch);
6405                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6406         }
6407         status = decode_compound_hdr(xdr, &hdr);
6408         if (status)
6409                 goto out;
6410         status = decode_sequence(xdr, &res->seq_res, rqstp);
6411         if (status)
6412                 goto out;
6413         status = decode_putfh(xdr);
6414         if (status)
6415                 goto out;
6416         status = decode_getacl(xdr, rqstp, res);
6417
6418 out:
6419         return status;
6420 }
6421
6422 /*
6423  * Decode CLOSE response
6424  */
6425 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6426                               struct nfs_closeres *res)
6427 {
6428         struct compound_hdr hdr;
6429         int status;
6430
6431         status = decode_compound_hdr(xdr, &hdr);
6432         if (status)
6433                 goto out;
6434         status = decode_sequence(xdr, &res->seq_res, rqstp);
6435         if (status)
6436                 goto out;
6437         status = decode_putfh(xdr);
6438         if (status)
6439                 goto out;
6440         status = decode_close(xdr, res);
6441         if (status != 0)
6442                 goto out;
6443         /*
6444          * Note: Server may do delete on close for this file
6445          *      in which case the getattr call will fail with
6446          *      an ESTALE error. Shouldn't be a problem,
6447          *      though, since fattr->valid will remain unset.
6448          */
6449         decode_getfattr(xdr, res->fattr, res->server);
6450 out:
6451         return status;
6452 }
6453
6454 /*
6455  * Decode OPEN response
6456  */
6457 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6458                              struct nfs_openres *res)
6459 {
6460         struct compound_hdr hdr;
6461         int status;
6462
6463         status = decode_compound_hdr(xdr, &hdr);
6464         if (status)
6465                 goto out;
6466         status = decode_sequence(xdr, &res->seq_res, rqstp);
6467         if (status)
6468                 goto out;
6469         status = decode_putfh(xdr);
6470         if (status)
6471                 goto out;
6472         status = decode_open(xdr, res);
6473         if (status)
6474                 goto out;
6475         status = decode_getfh(xdr, &res->fh);
6476         if (status)
6477                 goto out;
6478         if (res->access_request)
6479                 decode_access(xdr, &res->access_supported, &res->access_result);
6480         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6481 out:
6482         return status;
6483 }
6484
6485 /*
6486  * Decode OPEN_CONFIRM response
6487  */
6488 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6489                                      struct xdr_stream *xdr,
6490                                      struct nfs_open_confirmres *res)
6491 {
6492         struct compound_hdr hdr;
6493         int status;
6494
6495         status = decode_compound_hdr(xdr, &hdr);
6496         if (status)
6497                 goto out;
6498         status = decode_putfh(xdr);
6499         if (status)
6500                 goto out;
6501         status = decode_open_confirm(xdr, res);
6502 out:
6503         return status;
6504 }
6505
6506 /*
6507  * Decode OPEN response
6508  */
6509 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6510                                     struct xdr_stream *xdr,
6511                                     struct nfs_openres *res)
6512 {
6513         struct compound_hdr hdr;
6514         int status;
6515
6516         status = decode_compound_hdr(xdr, &hdr);
6517         if (status)
6518                 goto out;
6519         status = decode_sequence(xdr, &res->seq_res, rqstp);
6520         if (status)
6521                 goto out;
6522         status = decode_putfh(xdr);
6523         if (status)
6524                 goto out;
6525         status = decode_open(xdr, res);
6526         if (status)
6527                 goto out;
6528         if (res->access_request)
6529                 decode_access(xdr, &res->access_supported, &res->access_result);
6530         decode_getfattr(xdr, res->f_attr, res->server);
6531 out:
6532         return status;
6533 }
6534
6535 /*
6536  * Decode SETATTR response
6537  */
6538 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6539                                 struct xdr_stream *xdr,
6540                                 struct nfs_setattrres *res)
6541 {
6542         struct compound_hdr hdr;
6543         int status;
6544
6545         status = decode_compound_hdr(xdr, &hdr);
6546         if (status)
6547                 goto out;
6548         status = decode_sequence(xdr, &res->seq_res, rqstp);
6549         if (status)
6550                 goto out;
6551         status = decode_putfh(xdr);
6552         if (status)
6553                 goto out;
6554         status = decode_setattr(xdr);
6555         if (status)
6556                 goto out;
6557         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6558 out:
6559         return status;
6560 }
6561
6562 /*
6563  * Decode LOCK response
6564  */
6565 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6566                              struct nfs_lock_res *res)
6567 {
6568         struct compound_hdr hdr;
6569         int status;
6570
6571         status = decode_compound_hdr(xdr, &hdr);
6572         if (status)
6573                 goto out;
6574         status = decode_sequence(xdr, &res->seq_res, rqstp);
6575         if (status)
6576                 goto out;
6577         status = decode_putfh(xdr);
6578         if (status)
6579                 goto out;
6580         status = decode_lock(xdr, res);
6581 out:
6582         return status;
6583 }
6584
6585 /*
6586  * Decode LOCKT response
6587  */
6588 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6589                               struct nfs_lockt_res *res)
6590 {
6591         struct compound_hdr hdr;
6592         int status;
6593
6594         status = decode_compound_hdr(xdr, &hdr);
6595         if (status)
6596                 goto out;
6597         status = decode_sequence(xdr, &res->seq_res, rqstp);
6598         if (status)
6599                 goto out;
6600         status = decode_putfh(xdr);
6601         if (status)
6602                 goto out;
6603         status = decode_lockt(xdr, res);
6604 out:
6605         return status;
6606 }
6607
6608 /*
6609  * Decode LOCKU response
6610  */
6611 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6612                               struct nfs_locku_res *res)
6613 {
6614         struct compound_hdr hdr;
6615         int status;
6616
6617         status = decode_compound_hdr(xdr, &hdr);
6618         if (status)
6619                 goto out;
6620         status = decode_sequence(xdr, &res->seq_res, rqstp);
6621         if (status)
6622                 goto out;
6623         status = decode_putfh(xdr);
6624         if (status)
6625                 goto out;
6626         status = decode_locku(xdr, res);
6627 out:
6628         return status;
6629 }
6630
6631 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6632                                           struct xdr_stream *xdr, void *dummy)
6633 {
6634         struct compound_hdr hdr;
6635         int status;
6636
6637         status = decode_compound_hdr(xdr, &hdr);
6638         if (!status)
6639                 status = decode_release_lockowner(xdr);
6640         return status;
6641 }
6642
6643 /*
6644  * Decode READLINK response
6645  */
6646 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6647                                  struct xdr_stream *xdr,
6648                                  struct nfs4_readlink_res *res)
6649 {
6650         struct compound_hdr hdr;
6651         int status;
6652
6653         status = decode_compound_hdr(xdr, &hdr);
6654         if (status)
6655                 goto out;
6656         status = decode_sequence(xdr, &res->seq_res, rqstp);
6657         if (status)
6658                 goto out;
6659         status = decode_putfh(xdr);
6660         if (status)
6661                 goto out;
6662         status = decode_readlink(xdr, rqstp);
6663 out:
6664         return status;
6665 }
6666
6667 /*
6668  * Decode READDIR response
6669  */
6670 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6671                                 struct nfs4_readdir_res *res)
6672 {
6673         struct compound_hdr hdr;
6674         int status;
6675
6676         status = decode_compound_hdr(xdr, &hdr);
6677         if (status)
6678                 goto out;
6679         status = decode_sequence(xdr, &res->seq_res, rqstp);
6680         if (status)
6681                 goto out;
6682         status = decode_putfh(xdr);
6683         if (status)
6684                 goto out;
6685         status = decode_readdir(xdr, rqstp, res);
6686 out:
6687         return status;
6688 }
6689
6690 /*
6691  * Decode Read response
6692  */
6693 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6694                              struct nfs_pgio_res *res)
6695 {
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         res->op_status = hdr.status;
6701         if (status)
6702                 goto out;
6703         status = decode_sequence(xdr, &res->seq_res, rqstp);
6704         if (status)
6705                 goto out;
6706         status = decode_putfh(xdr);
6707         if (status)
6708                 goto out;
6709         status = decode_read(xdr, rqstp, res);
6710         if (!status)
6711                 status = res->count;
6712 out:
6713         return status;
6714 }
6715
6716 /*
6717  * Decode WRITE response
6718  */
6719 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6720                               struct nfs_pgio_res *res)
6721 {
6722         struct compound_hdr hdr;
6723         int status;
6724
6725         status = decode_compound_hdr(xdr, &hdr);
6726         res->op_status = hdr.status;
6727         if (status)
6728                 goto out;
6729         status = decode_sequence(xdr, &res->seq_res, rqstp);
6730         if (status)
6731                 goto out;
6732         status = decode_putfh(xdr);
6733         if (status)
6734                 goto out;
6735         status = decode_write(xdr, res);
6736         if (status)
6737                 goto out;
6738         if (res->fattr)
6739                 decode_getfattr(xdr, res->fattr, res->server);
6740         if (!status)
6741                 status = res->count;
6742 out:
6743         return status;
6744 }
6745
6746 /*
6747  * Decode COMMIT response
6748  */
6749 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6750                                struct nfs_commitres *res)
6751 {
6752         struct compound_hdr hdr;
6753         int status;
6754
6755         status = decode_compound_hdr(xdr, &hdr);
6756         res->op_status = hdr.status;
6757         if (status)
6758                 goto out;
6759         status = decode_sequence(xdr, &res->seq_res, rqstp);
6760         if (status)
6761                 goto out;
6762         status = decode_putfh(xdr);
6763         if (status)
6764                 goto out;
6765         status = decode_commit(xdr, res);
6766 out:
6767         return status;
6768 }
6769
6770 /*
6771  * Decode FSINFO response
6772  */
6773 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6774                                struct nfs4_fsinfo_res *res)
6775 {
6776         struct compound_hdr hdr;
6777         int status;
6778
6779         status = decode_compound_hdr(xdr, &hdr);
6780         if (!status)
6781                 status = decode_sequence(xdr, &res->seq_res, req);
6782         if (!status)
6783                 status = decode_putfh(xdr);
6784         if (!status)
6785                 status = decode_fsinfo(xdr, res->fsinfo);
6786         return status;
6787 }
6788
6789 /*
6790  * Decode PATHCONF response
6791  */
6792 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6793                                  struct nfs4_pathconf_res *res)
6794 {
6795         struct compound_hdr hdr;
6796         int status;
6797
6798         status = decode_compound_hdr(xdr, &hdr);
6799         if (!status)
6800                 status = decode_sequence(xdr, &res->seq_res, req);
6801         if (!status)
6802                 status = decode_putfh(xdr);
6803         if (!status)
6804                 status = decode_pathconf(xdr, res->pathconf);
6805         return status;
6806 }
6807
6808 /*
6809  * Decode STATFS response
6810  */
6811 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6812                                struct nfs4_statfs_res *res)
6813 {
6814         struct compound_hdr hdr;
6815         int status;
6816
6817         status = decode_compound_hdr(xdr, &hdr);
6818         if (!status)
6819                 status = decode_sequence(xdr, &res->seq_res, req);
6820         if (!status)
6821                 status = decode_putfh(xdr);
6822         if (!status)
6823                 status = decode_statfs(xdr, res->fsstat);
6824         return status;
6825 }
6826
6827 /*
6828  * Decode GETATTR_BITMAP response
6829  */
6830 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6831                                     struct xdr_stream *xdr,
6832                                     struct nfs4_server_caps_res *res)
6833 {
6834         struct compound_hdr hdr;
6835         int status;
6836
6837         status = decode_compound_hdr(xdr, &hdr);
6838         if (status)
6839                 goto out;
6840         status = decode_sequence(xdr, &res->seq_res, req);
6841         if (status)
6842                 goto out;
6843         status = decode_putfh(xdr);
6844         if (status)
6845                 goto out;
6846         status = decode_server_caps(xdr, res);
6847 out:
6848         return status;
6849 }
6850
6851 /*
6852  * Decode RENEW response
6853  */
6854 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6855                               void *__unused)
6856 {
6857         struct compound_hdr hdr;
6858         int status;
6859
6860         status = decode_compound_hdr(xdr, &hdr);
6861         if (!status)
6862                 status = decode_renew(xdr);
6863         return status;
6864 }
6865
6866 /*
6867  * Decode SETCLIENTID response
6868  */
6869 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6870                                     struct xdr_stream *xdr,
6871                                     struct nfs4_setclientid_res *res)
6872 {
6873         struct compound_hdr hdr;
6874         int status;
6875
6876         status = decode_compound_hdr(xdr, &hdr);
6877         if (!status)
6878                 status = decode_setclientid(xdr, res);
6879         return status;
6880 }
6881
6882 /*
6883  * Decode SETCLIENTID_CONFIRM response
6884  */
6885 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6886                                             struct xdr_stream *xdr)
6887 {
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (!status)
6893                 status = decode_setclientid_confirm(xdr);
6894         return status;
6895 }
6896
6897 /*
6898  * Decode DELEGRETURN response
6899  */
6900 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6901                                     struct xdr_stream *xdr,
6902                                     struct nfs4_delegreturnres *res)
6903 {
6904         struct compound_hdr hdr;
6905         int status;
6906
6907         status = decode_compound_hdr(xdr, &hdr);
6908         if (status)
6909                 goto out;
6910         status = decode_sequence(xdr, &res->seq_res, rqstp);
6911         if (status)
6912                 goto out;
6913         status = decode_putfh(xdr);
6914         if (status != 0)
6915                 goto out;
6916         status = decode_getfattr(xdr, res->fattr, res->server);
6917         if (status != 0)
6918                 goto out;
6919         status = decode_delegreturn(xdr);
6920 out:
6921         return status;
6922 }
6923
6924 /*
6925  * Decode FS_LOCATIONS response
6926  */
6927 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6928                                      struct xdr_stream *xdr,
6929                                      struct nfs4_fs_locations_res *res)
6930 {
6931         struct compound_hdr hdr;
6932         int status;
6933
6934         status = decode_compound_hdr(xdr, &hdr);
6935         if (status)
6936                 goto out;
6937         status = decode_sequence(xdr, &res->seq_res, req);
6938         if (status)
6939                 goto out;
6940         status = decode_putfh(xdr);
6941         if (status)
6942                 goto out;
6943         if (res->migration) {
6944                 xdr_enter_page(xdr, PAGE_SIZE);
6945                 status = decode_getfattr_generic(xdr,
6946                                         &res->fs_locations->fattr,
6947                                          NULL, res->fs_locations,
6948                                          NULL, res->fs_locations->server);
6949                 if (status)
6950                         goto out;
6951                 if (res->renew)
6952                         status = decode_renew(xdr);
6953         } else {
6954                 status = decode_lookup(xdr);
6955                 if (status)
6956                         goto out;
6957                 xdr_enter_page(xdr, PAGE_SIZE);
6958                 status = decode_getfattr_generic(xdr,
6959                                         &res->fs_locations->fattr,
6960                                          NULL, res->fs_locations,
6961                                          NULL, res->fs_locations->server);
6962         }
6963 out:
6964         return status;
6965 }
6966
6967 /*
6968  * Decode SECINFO response
6969  */
6970 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6971                                 struct xdr_stream *xdr,
6972                                 struct nfs4_secinfo_res *res)
6973 {
6974         struct compound_hdr hdr;
6975         int status;
6976
6977         status = decode_compound_hdr(xdr, &hdr);
6978         if (status)
6979                 goto out;
6980         status = decode_sequence(xdr, &res->seq_res, rqstp);
6981         if (status)
6982                 goto out;
6983         status = decode_putfh(xdr);
6984         if (status)
6985                 goto out;
6986         status = decode_secinfo(xdr, res);
6987 out:
6988         return status;
6989 }
6990
6991 /*
6992  * Decode FSID_PRESENT response
6993  */
6994 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6995                                      struct xdr_stream *xdr,
6996                                      struct nfs4_fsid_present_res *res)
6997 {
6998         struct compound_hdr hdr;
6999         int status;
7000
7001         status = decode_compound_hdr(xdr, &hdr);
7002         if (status)
7003                 goto out;
7004         status = decode_sequence(xdr, &res->seq_res, rqstp);
7005         if (status)
7006                 goto out;
7007         status = decode_putfh(xdr);
7008         if (status)
7009                 goto out;
7010         status = decode_getfh(xdr, res->fh);
7011         if (status)
7012                 goto out;
7013         if (res->renew)
7014                 status = decode_renew(xdr);
7015 out:
7016         return status;
7017 }
7018
7019 #if defined(CONFIG_NFS_V4_1)
7020 /*
7021  * Decode BIND_CONN_TO_SESSION response
7022  */
7023 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7024                                         struct xdr_stream *xdr,
7025                                         void *res)
7026 {
7027         struct compound_hdr hdr;
7028         int status;
7029
7030         status = decode_compound_hdr(xdr, &hdr);
7031         if (!status)
7032                 status = decode_bind_conn_to_session(xdr, res);
7033         return status;
7034 }
7035
7036 /*
7037  * Decode EXCHANGE_ID response
7038  */
7039 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7040                                     struct xdr_stream *xdr,
7041                                     void *res)
7042 {
7043         struct compound_hdr hdr;
7044         int status;
7045
7046         status = decode_compound_hdr(xdr, &hdr);
7047         if (!status)
7048                 status = decode_exchange_id(xdr, res);
7049         return status;
7050 }
7051
7052 /*
7053  * Decode CREATE_SESSION response
7054  */
7055 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7056                                        struct xdr_stream *xdr,
7057                                        struct nfs41_create_session_res *res)
7058 {
7059         struct compound_hdr hdr;
7060         int status;
7061
7062         status = decode_compound_hdr(xdr, &hdr);
7063         if (!status)
7064                 status = decode_create_session(xdr, res);
7065         return status;
7066 }
7067
7068 /*
7069  * Decode DESTROY_SESSION response
7070  */
7071 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7072                                         struct xdr_stream *xdr,
7073                                         void *res)
7074 {
7075         struct compound_hdr hdr;
7076         int status;
7077
7078         status = decode_compound_hdr(xdr, &hdr);
7079         if (!status)
7080                 status = decode_destroy_session(xdr, res);
7081         return status;
7082 }
7083
7084 /*
7085  * Decode DESTROY_CLIENTID response
7086  */
7087 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7088                                         struct xdr_stream *xdr,
7089                                         void *res)
7090 {
7091         struct compound_hdr hdr;
7092         int status;
7093
7094         status = decode_compound_hdr(xdr, &hdr);
7095         if (!status)
7096                 status = decode_destroy_clientid(xdr, res);
7097         return status;
7098 }
7099
7100 /*
7101  * Decode SEQUENCE response
7102  */
7103 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7104                                  struct xdr_stream *xdr,
7105                                  struct nfs4_sequence_res *res)
7106 {
7107         struct compound_hdr hdr;
7108         int status;
7109
7110         status = decode_compound_hdr(xdr, &hdr);
7111         if (!status)
7112                 status = decode_sequence(xdr, res, rqstp);
7113         return status;
7114 }
7115
7116 /*
7117  * Decode GET_LEASE_TIME response
7118  */
7119 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7120                                        struct xdr_stream *xdr,
7121                                        struct nfs4_get_lease_time_res *res)
7122 {
7123         struct compound_hdr hdr;
7124         int status;
7125
7126         status = decode_compound_hdr(xdr, &hdr);
7127         if (!status)
7128                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7129         if (!status)
7130                 status = decode_putrootfh(xdr);
7131         if (!status)
7132                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7133         return status;
7134 }
7135
7136 /*
7137  * Decode RECLAIM_COMPLETE response
7138  */
7139 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7140                                          struct xdr_stream *xdr,
7141                                          struct nfs41_reclaim_complete_res *res)
7142 {
7143         struct compound_hdr hdr;
7144         int status;
7145
7146         status = decode_compound_hdr(xdr, &hdr);
7147         if (!status)
7148                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7149         if (!status)
7150                 status = decode_reclaim_complete(xdr, NULL);
7151         return status;
7152 }
7153
7154 /*
7155  * Decode GETDEVINFO response
7156  */
7157 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7158                                       struct xdr_stream *xdr,
7159                                       struct nfs4_getdeviceinfo_res *res)
7160 {
7161         struct compound_hdr hdr;
7162         int status;
7163
7164         status = decode_compound_hdr(xdr, &hdr);
7165         if (status != 0)
7166                 goto out;
7167         status = decode_sequence(xdr, &res->seq_res, rqstp);
7168         if (status != 0)
7169                 goto out;
7170         status = decode_getdeviceinfo(xdr, res);
7171 out:
7172         return status;
7173 }
7174
7175 /*
7176  * Decode LAYOUTGET response
7177  */
7178 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7179                                   struct xdr_stream *xdr,
7180                                   struct nfs4_layoutget_res *res)
7181 {
7182         struct compound_hdr hdr;
7183         int status;
7184
7185         status = decode_compound_hdr(xdr, &hdr);
7186         if (status)
7187                 goto out;
7188         status = decode_sequence(xdr, &res->seq_res, rqstp);
7189         if (status)
7190                 goto out;
7191         status = decode_putfh(xdr);
7192         if (status)
7193                 goto out;
7194         status = decode_layoutget(xdr, rqstp, res);
7195 out:
7196         return status;
7197 }
7198
7199 /*
7200  * Decode LAYOUTRETURN response
7201  */
7202 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7203                                      struct xdr_stream *xdr,
7204                                      struct nfs4_layoutreturn_res *res)
7205 {
7206         struct compound_hdr hdr;
7207         int status;
7208
7209         status = decode_compound_hdr(xdr, &hdr);
7210         if (status)
7211                 goto out;
7212         status = decode_sequence(xdr, &res->seq_res, rqstp);
7213         if (status)
7214                 goto out;
7215         status = decode_putfh(xdr);
7216         if (status)
7217                 goto out;
7218         status = decode_layoutreturn(xdr, res);
7219 out:
7220         return status;
7221 }
7222
7223 /*
7224  * Decode LAYOUTCOMMIT response
7225  */
7226 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7227                                      struct xdr_stream *xdr,
7228                                      struct nfs4_layoutcommit_res *res)
7229 {
7230         struct compound_hdr hdr;
7231         int status;
7232
7233         status = decode_compound_hdr(xdr, &hdr);
7234         if (status)
7235                 goto out;
7236         status = decode_sequence(xdr, &res->seq_res, rqstp);
7237         if (status)
7238                 goto out;
7239         status = decode_putfh(xdr);
7240         if (status)
7241                 goto out;
7242         status = decode_layoutcommit(xdr, rqstp, res);
7243         if (status)
7244                 goto out;
7245         decode_getfattr(xdr, res->fattr, res->server);
7246 out:
7247         return status;
7248 }
7249
7250 /*
7251  * Decode SECINFO_NO_NAME response
7252  */
7253 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7254                                         struct xdr_stream *xdr,
7255                                         struct nfs4_secinfo_res *res)
7256 {
7257         struct compound_hdr hdr;
7258         int status;
7259
7260         status = decode_compound_hdr(xdr, &hdr);
7261         if (status)
7262                 goto out;
7263         status = decode_sequence(xdr, &res->seq_res, rqstp);
7264         if (status)
7265                 goto out;
7266         status = decode_putrootfh(xdr);
7267         if (status)
7268                 goto out;
7269         status = decode_secinfo_no_name(xdr, res);
7270 out:
7271         return status;
7272 }
7273
7274 /*
7275  * Decode TEST_STATEID response
7276  */
7277 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7278                                      struct xdr_stream *xdr,
7279                                      struct nfs41_test_stateid_res *res)
7280 {
7281         struct compound_hdr hdr;
7282         int status;
7283
7284         status = decode_compound_hdr(xdr, &hdr);
7285         if (status)
7286                 goto out;
7287         status = decode_sequence(xdr, &res->seq_res, rqstp);
7288         if (status)
7289                 goto out;
7290         status = decode_test_stateid(xdr, res);
7291 out:
7292         return status;
7293 }
7294
7295 /*
7296  * Decode FREE_STATEID response
7297  */
7298 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7299                                      struct xdr_stream *xdr,
7300                                      struct nfs41_free_stateid_res *res)
7301 {
7302         struct compound_hdr hdr;
7303         int status;
7304
7305         status = decode_compound_hdr(xdr, &hdr);
7306         if (status)
7307                 goto out;
7308         status = decode_sequence(xdr, &res->seq_res, rqstp);
7309         if (status)
7310                 goto out;
7311         status = decode_free_stateid(xdr, res);
7312 out:
7313         return status;
7314 }
7315 #endif /* CONFIG_NFS_V4_1 */
7316
7317 /**
7318  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7319  *                      the local page cache.
7320  * @xdr: XDR stream where entry resides
7321  * @entry: buffer to fill in with entry data
7322  * @plus: boolean indicating whether this should be a readdirplus entry
7323  *
7324  * Returns zero if successful, otherwise a negative errno value is
7325  * returned.
7326  *
7327  * This function is not invoked during READDIR reply decoding, but
7328  * rather whenever an application invokes the getdents(2) system call
7329  * on a directory already in our cache.
7330  */
7331 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7332                        int plus)
7333 {
7334         unsigned int savep;
7335         uint32_t bitmap[3] = {0};
7336         uint32_t len;
7337         __be32 *p = xdr_inline_decode(xdr, 4);
7338         if (unlikely(!p))
7339                 goto out_overflow;
7340         if (*p == xdr_zero) {
7341                 p = xdr_inline_decode(xdr, 4);
7342                 if (unlikely(!p))
7343                         goto out_overflow;
7344                 if (*p == xdr_zero)
7345                         return -EAGAIN;
7346                 entry->eof = 1;
7347                 return -EBADCOOKIE;
7348         }
7349
7350         p = xdr_inline_decode(xdr, 12);
7351         if (unlikely(!p))
7352                 goto out_overflow;
7353         entry->prev_cookie = entry->cookie;
7354         p = xdr_decode_hyper(p, &entry->cookie);
7355         entry->len = be32_to_cpup(p);
7356
7357         p = xdr_inline_decode(xdr, entry->len);
7358         if (unlikely(!p))
7359                 goto out_overflow;
7360         entry->name = (const char *) p;
7361
7362         /*
7363          * In case the server doesn't return an inode number,
7364          * we fake one here.  (We don't use inode number 0,
7365          * since glibc seems to choke on it...)
7366          */
7367         entry->ino = 1;
7368         entry->fattr->valid = 0;
7369
7370         if (decode_attr_bitmap(xdr, bitmap) < 0)
7371                 goto out_overflow;
7372
7373         if (decode_attr_length(xdr, &len, &savep) < 0)
7374                 goto out_overflow;
7375
7376         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7377                         NULL, entry->label, entry->server) < 0)
7378                 goto out_overflow;
7379         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7380                 entry->ino = entry->fattr->mounted_on_fileid;
7381         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7382                 entry->ino = entry->fattr->fileid;
7383
7384         entry->d_type = DT_UNKNOWN;
7385         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7386                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7387
7388         return 0;
7389
7390 out_overflow:
7391         print_overflow_msg(__func__, xdr);
7392         return -EAGAIN;
7393 }
7394
7395 /*
7396  * We need to translate between nfs status return values and
7397  * the local errno values which may not be the same.
7398  */
7399 static struct {
7400         int stat;
7401         int errno;
7402 } nfs_errtbl[] = {
7403         { NFS4_OK,              0               },
7404         { NFS4ERR_PERM,         -EPERM          },
7405         { NFS4ERR_NOENT,        -ENOENT         },
7406         { NFS4ERR_IO,           -errno_NFSERR_IO},
7407         { NFS4ERR_NXIO,         -ENXIO          },
7408         { NFS4ERR_ACCESS,       -EACCES         },
7409         { NFS4ERR_EXIST,        -EEXIST         },
7410         { NFS4ERR_XDEV,         -EXDEV          },
7411         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7412         { NFS4ERR_ISDIR,        -EISDIR         },
7413         { NFS4ERR_INVAL,        -EINVAL         },
7414         { NFS4ERR_FBIG,         -EFBIG          },
7415         { NFS4ERR_NOSPC,        -ENOSPC         },
7416         { NFS4ERR_ROFS,         -EROFS          },
7417         { NFS4ERR_MLINK,        -EMLINK         },
7418         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7419         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7420         { NFS4ERR_DQUOT,        -EDQUOT         },
7421         { NFS4ERR_STALE,        -ESTALE         },
7422         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7423         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7424         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7425         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7426         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7427         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7428         { NFS4ERR_LOCKED,       -EAGAIN         },
7429         { NFS4ERR_SYMLINK,      -ELOOP          },
7430         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7431         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7432         { -1,                   -EIO            }
7433 };
7434
7435 /*
7436  * Convert an NFS error code to a local one.
7437  * This one is used jointly by NFSv2 and NFSv3.
7438  */
7439 static int
7440 nfs4_stat_to_errno(int stat)
7441 {
7442         int i;
7443         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7444                 if (nfs_errtbl[i].stat == stat)
7445                         return nfs_errtbl[i].errno;
7446         }
7447         if (stat <= 10000 || stat > 10100) {
7448                 /* The server is looney tunes. */
7449                 return -EREMOTEIO;
7450         }
7451         /* If we cannot translate the error, the recovery routines should
7452          * handle it.
7453          * Note: remaining NFSv4 error codes have values > 10000, so should
7454          * not conflict with native Linux error codes.
7455          */
7456         return -stat;
7457 }
7458
7459 #ifdef CONFIG_NFS_V4_2
7460 #include "nfs42xdr.c"
7461 #endif /* CONFIG_NFS_V4_2 */
7462
7463 #define PROC(proc, argtype, restype)                            \
7464 [NFSPROC4_CLNT_##proc] = {                                      \
7465         .p_proc   = NFSPROC4_COMPOUND,                          \
7466         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7467         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7468         .p_arglen = NFS4_##argtype##_sz,                        \
7469         .p_replen = NFS4_##restype##_sz,                        \
7470         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7471         .p_name   = #proc,                                      \
7472 }
7473
7474 #define STUB(proc)              \
7475 [NFSPROC4_CLNT_##proc] = {      \
7476         .p_name = #proc,        \
7477 }
7478
7479 struct rpc_procinfo     nfs4_procedures[] = {
7480         PROC(READ,              enc_read,               dec_read),
7481         PROC(WRITE,             enc_write,              dec_write),
7482         PROC(COMMIT,            enc_commit,             dec_commit),
7483         PROC(OPEN,              enc_open,               dec_open),
7484         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7485         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7486         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7487         PROC(CLOSE,             enc_close,              dec_close),
7488         PROC(SETATTR,           enc_setattr,            dec_setattr),
7489         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7490         PROC(RENEW,             enc_renew,              dec_renew),
7491         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7492         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7493         PROC(LOCK,              enc_lock,               dec_lock),
7494         PROC(LOCKT,             enc_lockt,              dec_lockt),
7495         PROC(LOCKU,             enc_locku,              dec_locku),
7496         PROC(ACCESS,            enc_access,             dec_access),
7497         PROC(GETATTR,           enc_getattr,            dec_getattr),
7498         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7499         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7500         PROC(REMOVE,            enc_remove,             dec_remove),
7501         PROC(RENAME,            enc_rename,             dec_rename),
7502         PROC(LINK,              enc_link,               dec_link),
7503         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7504         PROC(CREATE,            enc_create,             dec_create),
7505         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7506         PROC(STATFS,            enc_statfs,             dec_statfs),
7507         PROC(READLINK,          enc_readlink,           dec_readlink),
7508         PROC(READDIR,           enc_readdir,            dec_readdir),
7509         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7510         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7511         PROC(GETACL,            enc_getacl,             dec_getacl),
7512         PROC(SETACL,            enc_setacl,             dec_setacl),
7513         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7514         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7515         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7516         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7517 #if defined(CONFIG_NFS_V4_1)
7518         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7519         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7520         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7521         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7522         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7523         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7524         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7525         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7526         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7527         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7528         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7529         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7530         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7531         STUB(GETDEVICELIST),
7532         PROC(BIND_CONN_TO_SESSION,
7533                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7534         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7535 #endif /* CONFIG_NFS_V4_1 */
7536 #ifdef CONFIG_NFS_V4_2
7537         PROC(SEEK,              enc_seek,               dec_seek),
7538         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7539         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7540         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7541         PROC(CLONE,             enc_clone,              dec_clone),
7542         PROC(COPY,              enc_copy,               dec_copy),
7543 #endif /* CONFIG_NFS_V4_2 */
7544 };
7545
7546 const struct rpc_version nfs_version4 = {
7547         .number                 = 4,
7548         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7549         .procs                  = nfs4_procedures
7550 };
7551
7552 /*
7553  * Local variables:
7554  *  c-basic-offset: 8
7555  * End:
7556  */