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 (label && (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(ktime_to_ns(nn->boot_time)); /* stamp */
1854         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1855         *p++ = cpu_to_be32(0);                          /* UID */
1856         *p++ = cpu_to_be32(0);                          /* GID */
1857         *p = cpu_to_be32(0);                            /* No more gids */
1858 }
1859
1860 static void encode_destroy_session(struct xdr_stream *xdr,
1861                                    struct nfs4_session *session,
1862                                    struct compound_hdr *hdr)
1863 {
1864         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1865         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866 }
1867
1868 static void encode_destroy_clientid(struct xdr_stream *xdr,
1869                                    uint64_t clientid,
1870                                    struct compound_hdr *hdr)
1871 {
1872         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1873         encode_uint64(xdr, clientid);
1874 }
1875
1876 static void encode_reclaim_complete(struct xdr_stream *xdr,
1877                                     struct nfs41_reclaim_complete_args *args,
1878                                     struct compound_hdr *hdr)
1879 {
1880         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1881         encode_uint32(xdr, args->one_fs);
1882 }
1883 #endif /* CONFIG_NFS_V4_1 */
1884
1885 static void encode_sequence(struct xdr_stream *xdr,
1886                             const struct nfs4_sequence_args *args,
1887                             struct compound_hdr *hdr)
1888 {
1889 #if defined(CONFIG_NFS_V4_1)
1890         struct nfs4_session *session;
1891         struct nfs4_slot_table *tp;
1892         struct nfs4_slot *slot = args->sa_slot;
1893         __be32 *p;
1894
1895         tp = slot->table;
1896         session = tp->session;
1897         if (!session)
1898                 return;
1899
1900         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1901
1902         /*
1903          * Sessionid + seqid + slotid + max slotid + cache_this
1904          */
1905         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1906                 "max_slotid=%d cache_this=%d\n",
1907                 __func__,
1908                 ((u32 *)session->sess_id.data)[0],
1909                 ((u32 *)session->sess_id.data)[1],
1910                 ((u32 *)session->sess_id.data)[2],
1911                 ((u32 *)session->sess_id.data)[3],
1912                 slot->seq_nr, slot->slot_nr,
1913                 tp->highest_used_slotid, args->sa_cache_this);
1914         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1915         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1916         *p++ = cpu_to_be32(slot->seq_nr);
1917         *p++ = cpu_to_be32(slot->slot_nr);
1918         *p++ = cpu_to_be32(tp->highest_used_slotid);
1919         *p = cpu_to_be32(args->sa_cache_this);
1920 #endif /* CONFIG_NFS_V4_1 */
1921 }
1922
1923 #ifdef CONFIG_NFS_V4_1
1924 static void
1925 encode_getdeviceinfo(struct xdr_stream *xdr,
1926                      const struct nfs4_getdeviceinfo_args *args,
1927                      struct compound_hdr *hdr)
1928 {
1929         __be32 *p;
1930
1931         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1932         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1933         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1934                                     NFS4_DEVICEID4_SIZE);
1935         *p++ = cpu_to_be32(args->pdev->layout_type);
1936         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1937
1938         p = reserve_space(xdr, 4 + 4);
1939         *p++ = cpu_to_be32(1);                  /* bitmap length */
1940         *p++ = cpu_to_be32(args->notify_types);
1941 }
1942
1943 static void
1944 encode_layoutget(struct xdr_stream *xdr,
1945                       const struct nfs4_layoutget_args *args,
1946                       struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949
1950         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1951         p = reserve_space(xdr, 36);
1952         *p++ = cpu_to_be32(0);     /* Signal layout available */
1953         *p++ = cpu_to_be32(args->type);
1954         *p++ = cpu_to_be32(args->range.iomode);
1955         p = xdr_encode_hyper(p, args->range.offset);
1956         p = xdr_encode_hyper(p, args->range.length);
1957         p = xdr_encode_hyper(p, args->minlength);
1958         encode_nfs4_stateid(xdr, &args->stateid);
1959         encode_uint32(xdr, args->maxcount);
1960
1961         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1962                 __func__,
1963                 args->type,
1964                 args->range.iomode,
1965                 (unsigned long)args->range.offset,
1966                 (unsigned long)args->range.length,
1967                 args->maxcount);
1968 }
1969
1970 static int
1971 encode_layoutcommit(struct xdr_stream *xdr,
1972                     struct inode *inode,
1973                     struct nfs4_layoutcommit_args *args,
1974                     struct compound_hdr *hdr)
1975 {
1976         __be32 *p;
1977
1978         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1979                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1980
1981         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1982         p = reserve_space(xdr, 20);
1983         /* Only whole file layouts */
1984         p = xdr_encode_hyper(p, 0); /* offset */
1985         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1986         *p = cpu_to_be32(0); /* reclaim */
1987         encode_nfs4_stateid(xdr, &args->stateid);
1988         if (args->lastbytewritten != U64_MAX) {
1989                 p = reserve_space(xdr, 20);
1990                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1991                 p = xdr_encode_hyper(p, args->lastbytewritten);
1992         } else {
1993                 p = reserve_space(xdr, 12);
1994                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
1995         }
1996         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1997         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1998
1999         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2000                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2001                         NFS_I(inode)->layout, xdr, args);
2002         } else {
2003                 encode_uint32(xdr, args->layoutupdate_len);
2004                 if (args->layoutupdate_pages) {
2005                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2006                                         args->layoutupdate_len);
2007                 }
2008         }
2009
2010         return 0;
2011 }
2012
2013 static void
2014 encode_layoutreturn(struct xdr_stream *xdr,
2015                     const struct nfs4_layoutreturn_args *args,
2016                     struct compound_hdr *hdr)
2017 {
2018         __be32 *p;
2019
2020         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2021         p = reserve_space(xdr, 16);
2022         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2023         *p++ = cpu_to_be32(args->layout_type);
2024         *p++ = cpu_to_be32(args->range.iomode);
2025         *p = cpu_to_be32(RETURN_FILE);
2026         p = reserve_space(xdr, 16);
2027         p = xdr_encode_hyper(p, args->range.offset);
2028         p = xdr_encode_hyper(p, args->range.length);
2029         spin_lock(&args->inode->i_lock);
2030         encode_nfs4_stateid(xdr, &args->stateid);
2031         spin_unlock(&args->inode->i_lock);
2032         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2033                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2034                         NFS_I(args->inode)->layout, xdr, args);
2035         } else
2036                 encode_uint32(xdr, 0);
2037 }
2038
2039 static int
2040 encode_secinfo_no_name(struct xdr_stream *xdr,
2041                        const struct nfs41_secinfo_no_name_args *args,
2042                        struct compound_hdr *hdr)
2043 {
2044         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2045         encode_uint32(xdr, args->style);
2046         return 0;
2047 }
2048
2049 static void encode_test_stateid(struct xdr_stream *xdr,
2050                                 struct nfs41_test_stateid_args *args,
2051                                 struct compound_hdr *hdr)
2052 {
2053         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2054         encode_uint32(xdr, 1);
2055         encode_nfs4_stateid(xdr, args->stateid);
2056 }
2057
2058 static void encode_free_stateid(struct xdr_stream *xdr,
2059                                 struct nfs41_free_stateid_args *args,
2060                                 struct compound_hdr *hdr)
2061 {
2062         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2063         encode_nfs4_stateid(xdr, &args->stateid);
2064 }
2065 #endif /* CONFIG_NFS_V4_1 */
2066
2067 /*
2068  * END OF "GENERIC" ENCODE ROUTINES.
2069  */
2070
2071 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2072 {
2073 #if defined(CONFIG_NFS_V4_1)
2074         struct nfs4_session *session = args->sa_slot->table->session;
2075         if (session)
2076                 return session->clp->cl_mvops->minor_version;
2077 #endif /* CONFIG_NFS_V4_1 */
2078         return 0;
2079 }
2080
2081 /*
2082  * Encode an ACCESS request
2083  */
2084 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2085                                 const struct nfs4_accessargs *args)
2086 {
2087         struct compound_hdr hdr = {
2088                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2089         };
2090
2091         encode_compound_hdr(xdr, req, &hdr);
2092         encode_sequence(xdr, &args->seq_args, &hdr);
2093         encode_putfh(xdr, args->fh, &hdr);
2094         encode_access(xdr, args->access, &hdr);
2095         encode_getfattr(xdr, args->bitmask, &hdr);
2096         encode_nops(&hdr);
2097 }
2098
2099 /*
2100  * Encode LOOKUP request
2101  */
2102 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_lookup_arg *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->dir_fh, &hdr);
2112         encode_lookup(xdr, args->name, &hdr);
2113         encode_getfh(xdr, &hdr);
2114         encode_getfattr(xdr, args->bitmask, &hdr);
2115         encode_nops(&hdr);
2116 }
2117
2118 /*
2119  * Encode LOOKUP_ROOT request
2120  */
2121 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2122                                      struct xdr_stream *xdr,
2123                                      const struct nfs4_lookup_root_arg *args)
2124 {
2125         struct compound_hdr hdr = {
2126                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127         };
2128
2129         encode_compound_hdr(xdr, req, &hdr);
2130         encode_sequence(xdr, &args->seq_args, &hdr);
2131         encode_putrootfh(xdr, &hdr);
2132         encode_getfh(xdr, &hdr);
2133         encode_getfattr(xdr, args->bitmask, &hdr);
2134         encode_nops(&hdr);
2135 }
2136
2137 /*
2138  * Encode REMOVE request
2139  */
2140 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2141                                 const struct nfs_removeargs *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putfh(xdr, args->fh, &hdr);
2150         encode_remove(xdr, &args->name, &hdr);
2151         encode_nops(&hdr);
2152 }
2153
2154 /*
2155  * Encode RENAME request
2156  */
2157 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2158                                 const struct nfs_renameargs *args)
2159 {
2160         struct compound_hdr hdr = {
2161                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2162         };
2163
2164         encode_compound_hdr(xdr, req, &hdr);
2165         encode_sequence(xdr, &args->seq_args, &hdr);
2166         encode_putfh(xdr, args->old_dir, &hdr);
2167         encode_savefh(xdr, &hdr);
2168         encode_putfh(xdr, args->new_dir, &hdr);
2169         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode LINK request
2175  */
2176 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2177                              const struct nfs4_link_arg *args)
2178 {
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putfh(xdr, args->fh, &hdr);
2186         encode_savefh(xdr, &hdr);
2187         encode_putfh(xdr, args->dir_fh, &hdr);
2188         encode_link(xdr, args->name, &hdr);
2189         encode_restorefh(xdr, &hdr);
2190         encode_getfattr(xdr, args->bitmask, &hdr);
2191         encode_nops(&hdr);
2192 }
2193
2194 /*
2195  * Encode CREATE request
2196  */
2197 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                                 const struct nfs4_create_arg *args)
2199 {
2200         struct compound_hdr hdr = {
2201                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202         };
2203
2204         encode_compound_hdr(xdr, req, &hdr);
2205         encode_sequence(xdr, &args->seq_args, &hdr);
2206         encode_putfh(xdr, args->dir_fh, &hdr);
2207         encode_create(xdr, args, &hdr);
2208         encode_getfh(xdr, &hdr);
2209         encode_getfattr(xdr, args->bitmask, &hdr);
2210         encode_nops(&hdr);
2211 }
2212
2213 /*
2214  * Encode SYMLINK request
2215  */
2216 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2217                                  const struct nfs4_create_arg *args)
2218 {
2219         nfs4_xdr_enc_create(req, xdr, args);
2220 }
2221
2222 /*
2223  * Encode GETATTR request
2224  */
2225 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                  const struct nfs4_getattr_arg *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->fh, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode a CLOSE request
2241  */
2242 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                struct nfs_closeargs *args)
2244 {
2245         struct compound_hdr hdr = {
2246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247         };
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         encode_close(xdr, args, &hdr);
2253         encode_getfattr(xdr, args->bitmask, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode an OPEN request
2259  */
2260 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                               struct nfs_openargs *args)
2262 {
2263         struct compound_hdr hdr = {
2264                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265         };
2266
2267         encode_compound_hdr(xdr, req, &hdr);
2268         encode_sequence(xdr, &args->seq_args, &hdr);
2269         encode_putfh(xdr, args->fh, &hdr);
2270         encode_open(xdr, args, &hdr);
2271         encode_getfh(xdr, &hdr);
2272         if (args->access)
2273                 encode_access(xdr, args->access, &hdr);
2274         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode an OPEN_CONFIRM request
2280  */
2281 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2282                                       struct xdr_stream *xdr,
2283                                       struct nfs_open_confirmargs *args)
2284 {
2285         struct compound_hdr hdr = {
2286                 .nops   = 0,
2287         };
2288
2289         encode_compound_hdr(xdr, req, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_open_confirm(xdr, args, &hdr);
2292         encode_nops(&hdr);
2293 }
2294
2295 /*
2296  * Encode an OPEN request with no attributes.
2297  */
2298 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2299                                      struct xdr_stream *xdr,
2300                                      struct nfs_openargs *args)
2301 {
2302         struct compound_hdr hdr = {
2303                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2304         };
2305
2306         encode_compound_hdr(xdr, req, &hdr);
2307         encode_sequence(xdr, &args->seq_args, &hdr);
2308         encode_putfh(xdr, args->fh, &hdr);
2309         encode_open(xdr, args, &hdr);
2310         if (args->access)
2311                 encode_access(xdr, args->access, &hdr);
2312         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode an OPEN_DOWNGRADE request
2318  */
2319 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2320                                         struct xdr_stream *xdr,
2321                                         struct nfs_closeargs *args)
2322 {
2323         struct compound_hdr hdr = {
2324                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325         };
2326
2327         encode_compound_hdr(xdr, req, &hdr);
2328         encode_sequence(xdr, &args->seq_args, &hdr);
2329         encode_putfh(xdr, args->fh, &hdr);
2330         encode_open_downgrade(xdr, args, &hdr);
2331         encode_getfattr(xdr, args->bitmask, &hdr);
2332         encode_nops(&hdr);
2333 }
2334
2335 /*
2336  * Encode a LOCK request
2337  */
2338 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2339                               struct nfs_lock_args *args)
2340 {
2341         struct compound_hdr hdr = {
2342                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343         };
2344
2345         encode_compound_hdr(xdr, req, &hdr);
2346         encode_sequence(xdr, &args->seq_args, &hdr);
2347         encode_putfh(xdr, args->fh, &hdr);
2348         encode_lock(xdr, args, &hdr);
2349         encode_nops(&hdr);
2350 }
2351
2352 /*
2353  * Encode a LOCKT request
2354  */
2355 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2356                                struct nfs_lockt_args *args)
2357 {
2358         struct compound_hdr hdr = {
2359                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2360         };
2361
2362         encode_compound_hdr(xdr, req, &hdr);
2363         encode_sequence(xdr, &args->seq_args, &hdr);
2364         encode_putfh(xdr, args->fh, &hdr);
2365         encode_lockt(xdr, args, &hdr);
2366         encode_nops(&hdr);
2367 }
2368
2369 /*
2370  * Encode a LOCKU request
2371  */
2372 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2373                                struct nfs_locku_args *args)
2374 {
2375         struct compound_hdr hdr = {
2376                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2377         };
2378
2379         encode_compound_hdr(xdr, req, &hdr);
2380         encode_sequence(xdr, &args->seq_args, &hdr);
2381         encode_putfh(xdr, args->fh, &hdr);
2382         encode_locku(xdr, args, &hdr);
2383         encode_nops(&hdr);
2384 }
2385
2386 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2387                                            struct xdr_stream *xdr,
2388                                         struct nfs_release_lockowner_args *args)
2389 {
2390         struct compound_hdr hdr = {
2391                 .minorversion = 0,
2392         };
2393
2394         encode_compound_hdr(xdr, req, &hdr);
2395         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2396         encode_nops(&hdr);
2397 }
2398
2399 /*
2400  * Encode a READLINK request
2401  */
2402 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2403                                   const struct nfs4_readlink *args)
2404 {
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408
2409         encode_compound_hdr(xdr, req, &hdr);
2410         encode_sequence(xdr, &args->seq_args, &hdr);
2411         encode_putfh(xdr, args->fh, &hdr);
2412         encode_readlink(xdr, args, req, &hdr);
2413
2414         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2415                         args->pgbase, args->pglen);
2416         encode_nops(&hdr);
2417 }
2418
2419 /*
2420  * Encode a READDIR request
2421  */
2422 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2423                                  const struct nfs4_readdir_arg *args)
2424 {
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427         };
2428
2429         encode_compound_hdr(xdr, req, &hdr);
2430         encode_sequence(xdr, &args->seq_args, &hdr);
2431         encode_putfh(xdr, args->fh, &hdr);
2432         encode_readdir(xdr, args, req, &hdr);
2433
2434         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2435                          args->pgbase, args->count);
2436         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2437                         __func__, hdr.replen << 2, args->pages,
2438                         args->pgbase, args->count);
2439         encode_nops(&hdr);
2440 }
2441
2442 /*
2443  * Encode a READ request
2444  */
2445 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2446                               struct nfs_pgio_args *args)
2447 {
2448         struct compound_hdr hdr = {
2449                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2450         };
2451
2452         encode_compound_hdr(xdr, req, &hdr);
2453         encode_sequence(xdr, &args->seq_args, &hdr);
2454         encode_putfh(xdr, args->fh, &hdr);
2455         encode_read(xdr, args, &hdr);
2456
2457         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2458                          args->pages, args->pgbase, args->count);
2459         req->rq_rcv_buf.flags |= XDRBUF_READ;
2460         encode_nops(&hdr);
2461 }
2462
2463 /*
2464  * Encode an SETATTR request
2465  */
2466 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2467                                  struct nfs_setattrargs *args)
2468 {
2469         struct compound_hdr hdr = {
2470                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2471         };
2472
2473         encode_compound_hdr(xdr, req, &hdr);
2474         encode_sequence(xdr, &args->seq_args, &hdr);
2475         encode_putfh(xdr, args->fh, &hdr);
2476         encode_setattr(xdr, args, args->server, &hdr);
2477         encode_getfattr(xdr, args->bitmask, &hdr);
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * Encode a GETACL request
2483  */
2484 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2485                                 struct nfs_getaclargs *args)
2486 {
2487         struct compound_hdr hdr = {
2488                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2489         };
2490         uint32_t replen;
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_sequence(xdr, &args->seq_args, &hdr);
2494         encode_putfh(xdr, args->fh, &hdr);
2495         replen = hdr.replen + op_decode_hdr_maxsz;
2496         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2497
2498         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2499                 args->acl_pages, 0, args->acl_len);
2500
2501         encode_nops(&hdr);
2502 }
2503
2504 /*
2505  * Encode a WRITE request
2506  */
2507 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2508                                struct nfs_pgio_args *args)
2509 {
2510         struct compound_hdr hdr = {
2511                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2512         };
2513
2514         encode_compound_hdr(xdr, req, &hdr);
2515         encode_sequence(xdr, &args->seq_args, &hdr);
2516         encode_putfh(xdr, args->fh, &hdr);
2517         encode_write(xdr, args, &hdr);
2518         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2519         if (args->bitmask)
2520                 encode_getfattr(xdr, args->bitmask, &hdr);
2521         encode_nops(&hdr);
2522 }
2523
2524 /*
2525  *  a COMMIT request
2526  */
2527 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2528                                 struct nfs_commitargs *args)
2529 {
2530         struct compound_hdr hdr = {
2531                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2532         };
2533
2534         encode_compound_hdr(xdr, req, &hdr);
2535         encode_sequence(xdr, &args->seq_args, &hdr);
2536         encode_putfh(xdr, args->fh, &hdr);
2537         encode_commit(xdr, args, &hdr);
2538         encode_nops(&hdr);
2539 }
2540
2541 /*
2542  * FSINFO request
2543  */
2544 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2545                                 struct nfs4_fsinfo_arg *args)
2546 {
2547         struct compound_hdr hdr = {
2548                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2549         };
2550
2551         encode_compound_hdr(xdr, req, &hdr);
2552         encode_sequence(xdr, &args->seq_args, &hdr);
2553         encode_putfh(xdr, args->fh, &hdr);
2554         encode_fsinfo(xdr, args->bitmask, &hdr);
2555         encode_nops(&hdr);
2556 }
2557
2558 /*
2559  * a PATHCONF request
2560  */
2561 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2562                                   const struct nfs4_pathconf_arg *args)
2563 {
2564         struct compound_hdr hdr = {
2565                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2566         };
2567
2568         encode_compound_hdr(xdr, req, &hdr);
2569         encode_sequence(xdr, &args->seq_args, &hdr);
2570         encode_putfh(xdr, args->fh, &hdr);
2571         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2572                            &hdr);
2573         encode_nops(&hdr);
2574 }
2575
2576 /*
2577  * a STATFS request
2578  */
2579 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                                 const struct nfs4_statfs_arg *args)
2581 {
2582         struct compound_hdr hdr = {
2583                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2584         };
2585
2586         encode_compound_hdr(xdr, req, &hdr);
2587         encode_sequence(xdr, &args->seq_args, &hdr);
2588         encode_putfh(xdr, args->fh, &hdr);
2589         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2590                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * GETATTR_BITMAP request
2596  */
2597 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2598                                      struct xdr_stream *xdr,
2599                                      struct nfs4_server_caps_arg *args)
2600 {
2601         const u32 *bitmask = args->bitmask;
2602         struct compound_hdr hdr = {
2603                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604         };
2605
2606         encode_compound_hdr(xdr, req, &hdr);
2607         encode_sequence(xdr, &args->seq_args, &hdr);
2608         encode_putfh(xdr, args->fhandle, &hdr);
2609         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2610         encode_nops(&hdr);
2611 }
2612
2613 /*
2614  * a RENEW request
2615  */
2616 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2617                                struct nfs_client *clp)
2618 {
2619         struct compound_hdr hdr = {
2620                 .nops   = 0,
2621         };
2622
2623         encode_compound_hdr(xdr, req, &hdr);
2624         encode_renew(xdr, clp->cl_clientid, &hdr);
2625         encode_nops(&hdr);
2626 }
2627
2628 /*
2629  * a SETCLIENTID request
2630  */
2631 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2632                                      struct xdr_stream *xdr,
2633                                      struct nfs4_setclientid *sc)
2634 {
2635         struct compound_hdr hdr = {
2636                 .nops   = 0,
2637         };
2638
2639         encode_compound_hdr(xdr, req, &hdr);
2640         encode_setclientid(xdr, sc, &hdr);
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  * a SETCLIENTID_CONFIRM request
2646  */
2647 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2648                                              struct xdr_stream *xdr,
2649                                              struct nfs4_setclientid_res *arg)
2650 {
2651         struct compound_hdr hdr = {
2652                 .nops   = 0,
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_setclientid_confirm(xdr, arg, &hdr);
2657         encode_nops(&hdr);
2658 }
2659
2660 /*
2661  * DELEGRETURN request
2662  */
2663 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      const struct nfs4_delegreturnargs *args)
2666 {
2667         struct compound_hdr hdr = {
2668                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669         };
2670
2671         encode_compound_hdr(xdr, req, &hdr);
2672         encode_sequence(xdr, &args->seq_args, &hdr);
2673         encode_putfh(xdr, args->fhandle, &hdr);
2674         encode_getfattr(xdr, args->bitmask, &hdr);
2675         encode_delegreturn(xdr, args->stateid, &hdr);
2676         encode_nops(&hdr);
2677 }
2678
2679 /*
2680  * Encode FS_LOCATIONS request
2681  */
2682 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2683                                       struct xdr_stream *xdr,
2684                                       struct nfs4_fs_locations_arg *args)
2685 {
2686         struct compound_hdr hdr = {
2687                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2688         };
2689         uint32_t replen;
2690
2691         encode_compound_hdr(xdr, req, &hdr);
2692         encode_sequence(xdr, &args->seq_args, &hdr);
2693         if (args->migration) {
2694                 encode_putfh(xdr, args->fh, &hdr);
2695                 replen = hdr.replen;
2696                 encode_fs_locations(xdr, args->bitmask, &hdr);
2697                 if (args->renew)
2698                         encode_renew(xdr, args->clientid, &hdr);
2699         } else {
2700                 encode_putfh(xdr, args->dir_fh, &hdr);
2701                 encode_lookup(xdr, args->name, &hdr);
2702                 replen = hdr.replen;
2703                 encode_fs_locations(xdr, args->bitmask, &hdr);
2704         }
2705
2706         /* Set up reply kvec to capture returned fs_locations array. */
2707         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2708                         0, PAGE_SIZE);
2709         encode_nops(&hdr);
2710 }
2711
2712 /*
2713  * Encode SECINFO request
2714  */
2715 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2716                                 struct xdr_stream *xdr,
2717                                 struct nfs4_secinfo_arg *args)
2718 {
2719         struct compound_hdr hdr = {
2720                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721         };
2722
2723         encode_compound_hdr(xdr, req, &hdr);
2724         encode_sequence(xdr, &args->seq_args, &hdr);
2725         encode_putfh(xdr, args->dir_fh, &hdr);
2726         encode_secinfo(xdr, args->name, &hdr);
2727         encode_nops(&hdr);
2728 }
2729
2730 /*
2731  * Encode FSID_PRESENT request
2732  */
2733 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2734                                       struct xdr_stream *xdr,
2735                                       struct nfs4_fsid_present_arg *args)
2736 {
2737         struct compound_hdr hdr = {
2738                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2739         };
2740
2741         encode_compound_hdr(xdr, req, &hdr);
2742         encode_sequence(xdr, &args->seq_args, &hdr);
2743         encode_putfh(xdr, args->fh, &hdr);
2744         encode_getfh(xdr, &hdr);
2745         if (args->renew)
2746                 encode_renew(xdr, args->clientid, &hdr);
2747         encode_nops(&hdr);
2748 }
2749
2750 #if defined(CONFIG_NFS_V4_1)
2751 /*
2752  * BIND_CONN_TO_SESSION request
2753  */
2754 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2755                                 struct xdr_stream *xdr,
2756                                 struct nfs41_bind_conn_to_session_args *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = args->client->cl_mvops->minor_version,
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_bind_conn_to_session(xdr, args, &hdr);
2764         encode_nops(&hdr);
2765 }
2766
2767 /*
2768  * EXCHANGE_ID request
2769  */
2770 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2771                                      struct xdr_stream *xdr,
2772                                      struct nfs41_exchange_id_args *args)
2773 {
2774         struct compound_hdr hdr = {
2775                 .minorversion = args->client->cl_mvops->minor_version,
2776         };
2777
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_exchange_id(xdr, args, &hdr);
2780         encode_nops(&hdr);
2781 }
2782
2783 /*
2784  * a CREATE_SESSION request
2785  */
2786 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2787                                         struct xdr_stream *xdr,
2788                                         struct nfs41_create_session_args *args)
2789 {
2790         struct compound_hdr hdr = {
2791                 .minorversion = args->client->cl_mvops->minor_version,
2792         };
2793
2794         encode_compound_hdr(xdr, req, &hdr);
2795         encode_create_session(xdr, args, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * a DESTROY_SESSION request
2801  */
2802 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2803                                          struct xdr_stream *xdr,
2804                                          struct nfs4_session *session)
2805 {
2806         struct compound_hdr hdr = {
2807                 .minorversion = session->clp->cl_mvops->minor_version,
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_destroy_session(xdr, session, &hdr);
2812         encode_nops(&hdr);
2813 }
2814
2815 /*
2816  * a DESTROY_CLIENTID request
2817  */
2818 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2819                                          struct xdr_stream *xdr,
2820                                          struct nfs_client *clp)
2821 {
2822         struct compound_hdr hdr = {
2823                 .minorversion = clp->cl_mvops->minor_version,
2824         };
2825
2826         encode_compound_hdr(xdr, req, &hdr);
2827         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2828         encode_nops(&hdr);
2829 }
2830
2831 /*
2832  * a SEQUENCE request
2833  */
2834 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2835                                   struct nfs4_sequence_args *args)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(args),
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, args, &hdr);
2843         encode_nops(&hdr);
2844 }
2845
2846 /*
2847  * a GET_LEASE_TIME request
2848  */
2849 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2850                                         struct xdr_stream *xdr,
2851                                         struct nfs4_get_lease_time_args *args)
2852 {
2853         struct compound_hdr hdr = {
2854                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2855         };
2856         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2857
2858         encode_compound_hdr(xdr, req, &hdr);
2859         encode_sequence(xdr, &args->la_seq_args, &hdr);
2860         encode_putrootfh(xdr, &hdr);
2861         encode_fsinfo(xdr, lease_bitmap, &hdr);
2862         encode_nops(&hdr);
2863 }
2864
2865 /*
2866  * a RECLAIM_COMPLETE request
2867  */
2868 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2869                                           struct xdr_stream *xdr,
2870                                 struct nfs41_reclaim_complete_args *args)
2871 {
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_reclaim_complete(xdr, args, &hdr);
2879         encode_nops(&hdr);
2880 }
2881
2882 /*
2883  * Encode GETDEVICEINFO request
2884  */
2885 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2886                                        struct xdr_stream *xdr,
2887                                        struct nfs4_getdeviceinfo_args *args)
2888 {
2889         struct compound_hdr hdr = {
2890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->seq_args, &hdr);
2895         encode_getdeviceinfo(xdr, args, &hdr);
2896
2897         /* set up reply kvec. Subtract notification bitmap max size (2)
2898          * so that notification bitmap is put in xdr_buf tail */
2899         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2900                          args->pdev->pages, args->pdev->pgbase,
2901                          args->pdev->pglen);
2902
2903         encode_nops(&hdr);
2904 }
2905
2906 /*
2907  *  Encode LAYOUTGET request
2908  */
2909 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2910                                    struct xdr_stream *xdr,
2911                                    struct nfs4_layoutget_args *args)
2912 {
2913         struct compound_hdr hdr = {
2914                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915         };
2916
2917         encode_compound_hdr(xdr, req, &hdr);
2918         encode_sequence(xdr, &args->seq_args, &hdr);
2919         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2920         encode_layoutget(xdr, args, &hdr);
2921
2922         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2923             args->layout.pages, 0, args->layout.pglen);
2924
2925         encode_nops(&hdr);
2926 }
2927
2928 /*
2929  *  Encode LAYOUTCOMMIT request
2930  */
2931 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2932                                       struct xdr_stream *xdr,
2933                                       struct nfs4_layoutcommit_args *args)
2934 {
2935         struct nfs4_layoutcommit_data *data =
2936                 container_of(args, struct nfs4_layoutcommit_data, args);
2937         struct compound_hdr hdr = {
2938                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_sequence(xdr, &args->seq_args, &hdr);
2943         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2945         encode_getfattr(xdr, args->bitmask, &hdr);
2946         encode_nops(&hdr);
2947 }
2948
2949 /*
2950  * Encode LAYOUTRETURN request
2951  */
2952 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2953                                       struct xdr_stream *xdr,
2954                                       struct nfs4_layoutreturn_args *args)
2955 {
2956         struct compound_hdr hdr = {
2957                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2958         };
2959
2960         encode_compound_hdr(xdr, req, &hdr);
2961         encode_sequence(xdr, &args->seq_args, &hdr);
2962         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2963         encode_layoutreturn(xdr, args, &hdr);
2964         encode_nops(&hdr);
2965 }
2966
2967 /*
2968  * Encode SECINFO_NO_NAME request
2969  */
2970 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2971                                         struct xdr_stream *xdr,
2972                                         struct nfs41_secinfo_no_name_args *args)
2973 {
2974         struct compound_hdr hdr = {
2975                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976         };
2977
2978         encode_compound_hdr(xdr, req, &hdr);
2979         encode_sequence(xdr, &args->seq_args, &hdr);
2980         encode_putrootfh(xdr, &hdr);
2981         encode_secinfo_no_name(xdr, args, &hdr);
2982         encode_nops(&hdr);
2983         return 0;
2984 }
2985
2986 /*
2987  *  Encode TEST_STATEID request
2988  */
2989 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2990                                       struct xdr_stream *xdr,
2991                                       struct nfs41_test_stateid_args *args)
2992 {
2993         struct compound_hdr hdr = {
2994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2995         };
2996
2997         encode_compound_hdr(xdr, req, &hdr);
2998         encode_sequence(xdr, &args->seq_args, &hdr);
2999         encode_test_stateid(xdr, args, &hdr);
3000         encode_nops(&hdr);
3001 }
3002
3003 /*
3004  *  Encode FREE_STATEID request
3005  */
3006 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3007                                      struct xdr_stream *xdr,
3008                                      struct nfs41_free_stateid_args *args)
3009 {
3010         struct compound_hdr hdr = {
3011                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012         };
3013
3014         encode_compound_hdr(xdr, req, &hdr);
3015         encode_sequence(xdr, &args->seq_args, &hdr);
3016         encode_free_stateid(xdr, args, &hdr);
3017         encode_nops(&hdr);
3018 }
3019 #endif /* CONFIG_NFS_V4_1 */
3020
3021 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3022 {
3023         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3024                 "Remaining buffer length is %tu words.\n",
3025                 func, xdr->end - xdr->p);
3026 }
3027
3028 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3029 {
3030         __be32 *p;
3031
3032         p = xdr_inline_decode(xdr, 4);
3033         if (unlikely(!p))
3034                 goto out_overflow;
3035         *len = be32_to_cpup(p);
3036         p = xdr_inline_decode(xdr, *len);
3037         if (unlikely(!p))
3038                 goto out_overflow;
3039         *string = (char *)p;
3040         return 0;
3041 out_overflow:
3042         print_overflow_msg(__func__, xdr);
3043         return -EIO;
3044 }
3045
3046 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3047 {
3048         __be32 *p;
3049
3050         p = xdr_inline_decode(xdr, 8);
3051         if (unlikely(!p))
3052                 goto out_overflow;
3053         hdr->status = be32_to_cpup(p++);
3054         hdr->taglen = be32_to_cpup(p);
3055
3056         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3057         if (unlikely(!p))
3058                 goto out_overflow;
3059         hdr->tag = (char *)p;
3060         p += XDR_QUADLEN(hdr->taglen);
3061         hdr->nops = be32_to_cpup(p);
3062         if (unlikely(hdr->nops < 1))
3063                 return nfs4_stat_to_errno(hdr->status);
3064         return 0;
3065 out_overflow:
3066         print_overflow_msg(__func__, xdr);
3067         return -EIO;
3068 }
3069
3070 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3071                 int *nfs_retval)
3072 {
3073         __be32 *p;
3074         uint32_t opnum;
3075         int32_t nfserr;
3076
3077         p = xdr_inline_decode(xdr, 8);
3078         if (unlikely(!p))
3079                 goto out_overflow;
3080         opnum = be32_to_cpup(p++);
3081         if (unlikely(opnum != expected))
3082                 goto out_bad_operation;
3083         nfserr = be32_to_cpup(p);
3084         if (nfserr == NFS_OK)
3085                 *nfs_retval = 0;
3086         else
3087                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3088         return true;
3089 out_bad_operation:
3090         dprintk("nfs: Server returned operation"
3091                 " %d but we issued a request for %d\n",
3092                         opnum, expected);
3093         *nfs_retval = -EREMOTEIO;
3094         return false;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         *nfs_retval = -EIO;
3098         return false;
3099 }
3100
3101 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3102 {
3103         int retval;
3104
3105         __decode_op_hdr(xdr, expected, &retval);
3106         return retval;
3107 }
3108
3109 /* Dummy routine */
3110 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3111 {
3112         __be32 *p;
3113         unsigned int strlen;
3114         char *str;
3115
3116         p = xdr_inline_decode(xdr, 12);
3117         if (likely(p))
3118                 return decode_opaque_inline(xdr, &strlen, &str);
3119         print_overflow_msg(__func__, xdr);
3120         return -EIO;
3121 }
3122
3123 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3124 {
3125         uint32_t bmlen;
3126         __be32 *p;
3127
3128         p = xdr_inline_decode(xdr, 4);
3129         if (unlikely(!p))
3130                 goto out_overflow;
3131         bmlen = be32_to_cpup(p);
3132
3133         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3134         p = xdr_inline_decode(xdr, (bmlen << 2));
3135         if (unlikely(!p))
3136                 goto out_overflow;
3137         if (bmlen > 0) {
3138                 bitmap[0] = be32_to_cpup(p++);
3139                 if (bmlen > 1) {
3140                         bitmap[1] = be32_to_cpup(p++);
3141                         if (bmlen > 2)
3142                                 bitmap[2] = be32_to_cpup(p);
3143                 }
3144         }
3145         return 0;
3146 out_overflow:
3147         print_overflow_msg(__func__, xdr);
3148         return -EIO;
3149 }
3150
3151 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3152 {
3153         __be32 *p;
3154
3155         p = xdr_inline_decode(xdr, 4);
3156         if (unlikely(!p))
3157                 goto out_overflow;
3158         *attrlen = be32_to_cpup(p);
3159         *savep = xdr_stream_pos(xdr);
3160         return 0;
3161 out_overflow:
3162         print_overflow_msg(__func__, xdr);
3163         return -EIO;
3164 }
3165
3166 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3167 {
3168         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3169                 int ret;
3170                 ret = decode_attr_bitmap(xdr, bitmask);
3171                 if (unlikely(ret < 0))
3172                         return ret;
3173                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3174         } else
3175                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3176         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3177                 bitmask[0], bitmask[1], bitmask[2]);
3178         return 0;
3179 }
3180
3181 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3182 {
3183         __be32 *p;
3184         int ret = 0;
3185
3186         *type = 0;
3187         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3188                 return -EIO;
3189         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3190                 p = xdr_inline_decode(xdr, 4);
3191                 if (unlikely(!p))
3192                         goto out_overflow;
3193                 *type = be32_to_cpup(p);
3194                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3195                         dprintk("%s: bad type %d\n", __func__, *type);
3196                         return -EIO;
3197                 }
3198                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3199                 ret = NFS_ATTR_FATTR_TYPE;
3200         }
3201         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3202         return ret;
3203 out_overflow:
3204         print_overflow_msg(__func__, xdr);
3205         return -EIO;
3206 }
3207
3208 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3209                                       uint32_t *bitmap, uint32_t *type)
3210 {
3211         __be32 *p;
3212
3213         *type = 0;
3214         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3215                 return -EIO;
3216         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3217                 p = xdr_inline_decode(xdr, 4);
3218                 if (unlikely(!p))
3219                         goto out_overflow;
3220                 *type = be32_to_cpup(p);
3221                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3222         }
3223         dprintk("%s: expire type=0x%x\n", __func__, *type);
3224         return 0;
3225 out_overflow:
3226         print_overflow_msg(__func__, xdr);
3227         return -EIO;
3228 }
3229
3230 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3231 {
3232         __be32 *p;
3233         int ret = 0;
3234
3235         *change = 0;
3236         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3237                 return -EIO;
3238         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3239                 p = xdr_inline_decode(xdr, 8);
3240                 if (unlikely(!p))
3241                         goto out_overflow;
3242                 xdr_decode_hyper(p, change);
3243                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3244                 ret = NFS_ATTR_FATTR_CHANGE;
3245         }
3246         dprintk("%s: change attribute=%Lu\n", __func__,
3247                         (unsigned long long)*change);
3248         return ret;
3249 out_overflow:
3250         print_overflow_msg(__func__, xdr);
3251         return -EIO;
3252 }
3253
3254 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3255 {
3256         __be32 *p;
3257         int ret = 0;
3258
3259         *size = 0;
3260         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3261                 return -EIO;
3262         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3263                 p = xdr_inline_decode(xdr, 8);
3264                 if (unlikely(!p))
3265                         goto out_overflow;
3266                 xdr_decode_hyper(p, size);
3267                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3268                 ret = NFS_ATTR_FATTR_SIZE;
3269         }
3270         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3271         return ret;
3272 out_overflow:
3273         print_overflow_msg(__func__, xdr);
3274         return -EIO;
3275 }
3276
3277 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3278 {
3279         __be32 *p;
3280
3281         *res = 0;
3282         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3283                 return -EIO;
3284         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3285                 p = xdr_inline_decode(xdr, 4);
3286                 if (unlikely(!p))
3287                         goto out_overflow;
3288                 *res = be32_to_cpup(p);
3289                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3290         }
3291         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3292         return 0;
3293 out_overflow:
3294         print_overflow_msg(__func__, xdr);
3295         return -EIO;
3296 }
3297
3298 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3299 {
3300         __be32 *p;
3301
3302         *res = 0;
3303         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3304                 return -EIO;
3305         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3306                 p = xdr_inline_decode(xdr, 4);
3307                 if (unlikely(!p))
3308                         goto out_overflow;
3309                 *res = be32_to_cpup(p);
3310                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3311         }
3312         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3313         return 0;
3314 out_overflow:
3315         print_overflow_msg(__func__, xdr);
3316         return -EIO;
3317 }
3318
3319 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3320 {
3321         __be32 *p;
3322         int ret = 0;
3323
3324         fsid->major = 0;
3325         fsid->minor = 0;
3326         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3327                 return -EIO;
3328         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3329                 p = xdr_inline_decode(xdr, 16);
3330                 if (unlikely(!p))
3331                         goto out_overflow;
3332                 p = xdr_decode_hyper(p, &fsid->major);
3333                 xdr_decode_hyper(p, &fsid->minor);
3334                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3335                 ret = NFS_ATTR_FATTR_FSID;
3336         }
3337         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3338                         (unsigned long long)fsid->major,
3339                         (unsigned long long)fsid->minor);
3340         return ret;
3341 out_overflow:
3342         print_overflow_msg(__func__, xdr);
3343         return -EIO;
3344 }
3345
3346 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3347 {
3348         __be32 *p;
3349
3350         *res = 60;
3351         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3352                 return -EIO;
3353         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3354                 p = xdr_inline_decode(xdr, 4);
3355                 if (unlikely(!p))
3356                         goto out_overflow;
3357                 *res = be32_to_cpup(p);
3358                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3359         }
3360         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3361         return 0;
3362 out_overflow:
3363         print_overflow_msg(__func__, xdr);
3364         return -EIO;
3365 }
3366
3367 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3368 {
3369         __be32 *p;
3370
3371         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3374                 p = xdr_inline_decode(xdr, 4);
3375                 if (unlikely(!p))
3376                         goto out_overflow;
3377                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3378                 *res = -be32_to_cpup(p);
3379         }
3380         return 0;
3381 out_overflow:
3382         print_overflow_msg(__func__, xdr);
3383         return -EIO;
3384 }
3385
3386 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3387                                  uint32_t *bitmap, uint32_t *bitmask)
3388 {
3389         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3390                 int ret;
3391                 ret = decode_attr_bitmap(xdr, bitmask);
3392                 if (unlikely(ret < 0))
3393                         return ret;
3394                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3395         } else
3396                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3397         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3398                 bitmask[0], bitmask[1], bitmask[2]);
3399         return 0;
3400 }
3401
3402 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3403 {
3404         __be32 *p;
3405         int len;
3406
3407         if (fh != NULL)
3408                 memset(fh, 0, sizeof(*fh));
3409
3410         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3411                 return -EIO;
3412         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3413                 p = xdr_inline_decode(xdr, 4);
3414                 if (unlikely(!p))
3415                         goto out_overflow;
3416                 len = be32_to_cpup(p);
3417                 if (len > NFS4_FHSIZE)
3418                         return -EIO;
3419                 p = xdr_inline_decode(xdr, len);
3420                 if (unlikely(!p))
3421                         goto out_overflow;
3422                 if (fh != NULL) {
3423                         memcpy(fh->data, p, len);
3424                         fh->size = len;
3425                 }
3426                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3427         }
3428         return 0;
3429 out_overflow:
3430         print_overflow_msg(__func__, xdr);
3431         return -EIO;
3432 }
3433
3434 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3435 {
3436         __be32 *p;
3437
3438         *res = 0;
3439         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3440                 return -EIO;
3441         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3442                 p = xdr_inline_decode(xdr, 4);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 *res = be32_to_cpup(p);
3446                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3447         }
3448         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3449         return 0;
3450 out_overflow:
3451         print_overflow_msg(__func__, xdr);
3452         return -EIO;
3453 }
3454
3455 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3456 {
3457         __be32 *p;
3458         int ret = 0;
3459
3460         *fileid = 0;
3461         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3462                 return -EIO;
3463         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3464                 p = xdr_inline_decode(xdr, 8);
3465                 if (unlikely(!p))
3466                         goto out_overflow;
3467                 xdr_decode_hyper(p, fileid);
3468                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3469                 ret = NFS_ATTR_FATTR_FILEID;
3470         }
3471         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3472         return ret;
3473 out_overflow:
3474         print_overflow_msg(__func__, xdr);
3475         return -EIO;
3476 }
3477
3478 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480         __be32 *p;
3481         int ret = 0;
3482
3483         *fileid = 0;
3484         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3485                 return -EIO;
3486         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3487                 p = xdr_inline_decode(xdr, 8);
3488                 if (unlikely(!p))
3489                         goto out_overflow;
3490                 xdr_decode_hyper(p, fileid);
3491                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3492                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3493         }
3494         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495         return ret;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503         __be32 *p;
3504         int status = 0;
3505
3506         *res = 0;
3507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3510                 p = xdr_inline_decode(xdr, 8);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 xdr_decode_hyper(p, res);
3514                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3515         }
3516         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3517         return status;
3518 out_overflow:
3519         print_overflow_msg(__func__, xdr);
3520         return -EIO;
3521 }
3522
3523 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525         __be32 *p;
3526         int status = 0;
3527
3528         *res = 0;
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3532                 p = xdr_inline_decode(xdr, 8);
3533                 if (unlikely(!p))
3534                         goto out_overflow;
3535                 xdr_decode_hyper(p, res);
3536                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3537         }
3538         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3539         return status;
3540 out_overflow:
3541         print_overflow_msg(__func__, xdr);
3542         return -EIO;
3543 }
3544
3545 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547         __be32 *p;
3548         int status = 0;
3549
3550         *res = 0;
3551         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3552                 return -EIO;
3553         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3554                 p = xdr_inline_decode(xdr, 8);
3555                 if (unlikely(!p))
3556                         goto out_overflow;
3557                 xdr_decode_hyper(p, res);
3558                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3559         }
3560         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3561         return status;
3562 out_overflow:
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3568 {
3569         u32 n;
3570         __be32 *p;
3571         int status = 0;
3572
3573         p = xdr_inline_decode(xdr, 4);
3574         if (unlikely(!p))
3575                 goto out_overflow;
3576         n = be32_to_cpup(p);
3577         if (n == 0)
3578                 goto root_path;
3579         dprintk("pathname4: ");
3580         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3581                 dprintk("cannot parse %d components in path\n", n);
3582                 goto out_eio;
3583         }
3584         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3585                 struct nfs4_string *component = &path->components[path->ncomponents];
3586                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3587                 if (unlikely(status != 0))
3588                         goto out_eio;
3589                 ifdebug (XDR)
3590                         pr_cont("%s%.*s ",
3591                                 (path->ncomponents != n ? "/ " : ""),
3592                                 component->len, component->data);
3593         }
3594 out:
3595         return status;
3596 root_path:
3597 /* a root pathname is sent as a zero component4 */
3598         path->ncomponents = 1;
3599         path->components[0].len=0;
3600         path->components[0].data=NULL;
3601         dprintk("pathname4: /\n");
3602         goto out;
3603 out_eio:
3604         dprintk(" status %d", status);
3605         status = -EIO;
3606         goto out;
3607 out_overflow:
3608         print_overflow_msg(__func__, xdr);
3609         return -EIO;
3610 }
3611
3612 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3613 {
3614         int n;
3615         __be32 *p;
3616         int status = -EIO;
3617
3618         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3619                 goto out;
3620         status = 0;
3621         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3622                 goto out;
3623         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3624         status = -EIO;
3625         /* Ignore borken servers that return unrequested attrs */
3626         if (unlikely(res == NULL))
3627                 goto out;
3628         dprintk("%s: fsroot:\n", __func__);
3629         status = decode_pathname(xdr, &res->fs_path);
3630         if (unlikely(status != 0))
3631                 goto out;
3632         p = xdr_inline_decode(xdr, 4);
3633         if (unlikely(!p))
3634                 goto out_overflow;
3635         n = be32_to_cpup(p);
3636         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3637                 u32 m;
3638                 struct nfs4_fs_location *loc;
3639
3640                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3641                         break;
3642                 loc = &res->locations[res->nlocations];
3643                 p = xdr_inline_decode(xdr, 4);
3644                 if (unlikely(!p))
3645                         goto out_overflow;
3646                 m = be32_to_cpup(p);
3647
3648                 dprintk("%s: servers:\n", __func__);
3649                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3650                         struct nfs4_string *server;
3651
3652                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3653                                 unsigned int i;
3654                                 dprintk("%s: using first %u of %u servers "
3655                                         "returned for location %u\n",
3656                                                 __func__,
3657                                                 NFS4_FS_LOCATION_MAXSERVERS,
3658                                                 m, res->nlocations);
3659                                 for (i = loc->nservers; i < m; i++) {
3660                                         unsigned int len;
3661                                         char *data;
3662                                         status = decode_opaque_inline(xdr, &len, &data);
3663                                         if (unlikely(status != 0))
3664                                                 goto out_eio;
3665                                 }
3666                                 break;
3667                         }
3668                         server = &loc->servers[loc->nservers];
3669                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3670                         if (unlikely(status != 0))
3671                                 goto out_eio;
3672                         dprintk("%s ", server->data);
3673                 }
3674                 status = decode_pathname(xdr, &loc->rootpath);
3675                 if (unlikely(status != 0))
3676                         goto out_eio;
3677         }
3678         if (res->nlocations != 0)
3679                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3680 out:
3681         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3682         return status;
3683 out_overflow:
3684         print_overflow_msg(__func__, xdr);
3685 out_eio:
3686         status = -EIO;
3687         goto out;
3688 }
3689
3690 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3691 {
3692         __be32 *p;
3693         int status = 0;
3694
3695         *res = 0;
3696         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3697                 return -EIO;
3698         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3699                 p = xdr_inline_decode(xdr, 8);
3700                 if (unlikely(!p))
3701                         goto out_overflow;
3702                 xdr_decode_hyper(p, res);
3703                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3704         }
3705         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3706         return status;
3707 out_overflow:
3708         print_overflow_msg(__func__, xdr);
3709         return -EIO;
3710 }
3711
3712 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3713 {
3714         __be32 *p;
3715         int status = 0;
3716
3717         *maxlink = 1;
3718         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3719                 return -EIO;
3720         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3721                 p = xdr_inline_decode(xdr, 4);
3722                 if (unlikely(!p))
3723                         goto out_overflow;
3724                 *maxlink = be32_to_cpup(p);
3725                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3726         }
3727         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3728         return status;
3729 out_overflow:
3730         print_overflow_msg(__func__, xdr);
3731         return -EIO;
3732 }
3733
3734 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3735 {
3736         __be32 *p;
3737         int status = 0;
3738
3739         *maxname = 1024;
3740         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3741                 return -EIO;
3742         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3743                 p = xdr_inline_decode(xdr, 4);
3744                 if (unlikely(!p))
3745                         goto out_overflow;
3746                 *maxname = be32_to_cpup(p);
3747                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3748         }
3749         dprintk("%s: maxname=%u\n", __func__, *maxname);
3750         return status;
3751 out_overflow:
3752         print_overflow_msg(__func__, xdr);
3753         return -EIO;
3754 }
3755
3756 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3757 {
3758         __be32 *p;
3759         int status = 0;
3760
3761         *res = 1024;
3762         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3763                 return -EIO;
3764         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3765                 uint64_t maxread;
3766                 p = xdr_inline_decode(xdr, 8);
3767                 if (unlikely(!p))
3768                         goto out_overflow;
3769                 xdr_decode_hyper(p, &maxread);
3770                 if (maxread > 0x7FFFFFFF)
3771                         maxread = 0x7FFFFFFF;
3772                 *res = (uint32_t)maxread;
3773                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3774         }
3775         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3776         return status;
3777 out_overflow:
3778         print_overflow_msg(__func__, xdr);
3779         return -EIO;
3780 }
3781
3782 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3783 {
3784         __be32 *p;
3785         int status = 0;
3786
3787         *res = 1024;
3788         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3789                 return -EIO;
3790         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3791                 uint64_t maxwrite;
3792                 p = xdr_inline_decode(xdr, 8);
3793                 if (unlikely(!p))
3794                         goto out_overflow;
3795                 xdr_decode_hyper(p, &maxwrite);
3796                 if (maxwrite > 0x7FFFFFFF)
3797                         maxwrite = 0x7FFFFFFF;
3798                 *res = (uint32_t)maxwrite;
3799                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3800         }
3801         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3802         return status;
3803 out_overflow:
3804         print_overflow_msg(__func__, xdr);
3805         return -EIO;
3806 }
3807
3808 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3809 {
3810         uint32_t tmp;
3811         __be32 *p;
3812         int ret = 0;
3813
3814         *mode = 0;
3815         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3816                 return -EIO;
3817         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3818                 p = xdr_inline_decode(xdr, 4);
3819                 if (unlikely(!p))
3820                         goto out_overflow;
3821                 tmp = be32_to_cpup(p);
3822                 *mode = tmp & ~S_IFMT;
3823                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3824                 ret = NFS_ATTR_FATTR_MODE;
3825         }
3826         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3827         return ret;
3828 out_overflow:
3829         print_overflow_msg(__func__, xdr);
3830         return -EIO;
3831 }
3832
3833 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3834 {
3835         __be32 *p;
3836         int ret = 0;
3837
3838         *nlink = 1;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3842                 p = xdr_inline_decode(xdr, 4);
3843                 if (unlikely(!p))
3844                         goto out_overflow;
3845                 *nlink = be32_to_cpup(p);
3846                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3847                 ret = NFS_ATTR_FATTR_NLINK;
3848         }
3849         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3850         return ret;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855
3856 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3857                 const struct nfs_server *server, kuid_t *uid,
3858                 struct nfs4_string *owner_name)
3859 {
3860         uint32_t len;
3861         __be32 *p;
3862         int ret = 0;
3863
3864         *uid = make_kuid(&init_user_ns, -2);
3865         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3866                 return -EIO;
3867         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3868                 p = xdr_inline_decode(xdr, 4);
3869                 if (unlikely(!p))
3870                         goto out_overflow;
3871                 len = be32_to_cpup(p);
3872                 p = xdr_inline_decode(xdr, len);
3873                 if (unlikely(!p))
3874                         goto out_overflow;
3875                 if (owner_name != NULL) {
3876                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3877                         if (owner_name->data != NULL) {
3878                                 owner_name->len = len;
3879                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3880                         }
3881                 } else if (len < XDR_MAX_NETOBJ) {
3882                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3883                                 ret = NFS_ATTR_FATTR_OWNER;
3884                         else
3885                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3886                                                 __func__);
3887                 } else
3888                         dprintk("%s: name too long (%u)!\n",
3889                                         __func__, len);
3890                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3891         }
3892         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3893         return ret;
3894 out_overflow:
3895         print_overflow_msg(__func__, xdr);
3896         return -EIO;
3897 }
3898
3899 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3900                 const struct nfs_server *server, kgid_t *gid,
3901                 struct nfs4_string *group_name)
3902 {
3903         uint32_t len;
3904         __be32 *p;
3905         int ret = 0;
3906
3907         *gid = make_kgid(&init_user_ns, -2);
3908         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3909                 return -EIO;
3910         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3911                 p = xdr_inline_decode(xdr, 4);
3912                 if (unlikely(!p))
3913                         goto out_overflow;
3914                 len = be32_to_cpup(p);
3915                 p = xdr_inline_decode(xdr, len);
3916                 if (unlikely(!p))
3917                         goto out_overflow;
3918                 if (group_name != NULL) {
3919                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3920                         if (group_name->data != NULL) {
3921                                 group_name->len = len;
3922                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3923                         }
3924                 } else if (len < XDR_MAX_NETOBJ) {
3925                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3926                                 ret = NFS_ATTR_FATTR_GROUP;
3927                         else
3928                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3929                                                 __func__);
3930                 } else
3931                         dprintk("%s: name too long (%u)!\n",
3932                                         __func__, len);
3933                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3934         }
3935         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3936         return ret;
3937 out_overflow:
3938         print_overflow_msg(__func__, xdr);
3939         return -EIO;
3940 }
3941
3942 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3943 {
3944         uint32_t major = 0, minor = 0;
3945         __be32 *p;
3946         int ret = 0;
3947
3948         *rdev = MKDEV(0,0);
3949         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3950                 return -EIO;
3951         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3952                 dev_t tmp;
3953
3954                 p = xdr_inline_decode(xdr, 8);
3955                 if (unlikely(!p))
3956                         goto out_overflow;
3957                 major = be32_to_cpup(p++);
3958                 minor = be32_to_cpup(p);
3959                 tmp = MKDEV(major, minor);
3960                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3961                         *rdev = tmp;
3962                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3963                 ret = NFS_ATTR_FATTR_RDEV;
3964         }
3965         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3966         return ret;
3967 out_overflow:
3968         print_overflow_msg(__func__, xdr);
3969         return -EIO;
3970 }
3971
3972 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3973 {
3974         __be32 *p;
3975         int status = 0;
3976
3977         *res = 0;
3978         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3979                 return -EIO;
3980         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3981                 p = xdr_inline_decode(xdr, 8);
3982                 if (unlikely(!p))
3983                         goto out_overflow;
3984                 xdr_decode_hyper(p, res);
3985                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3986         }
3987         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3988         return status;
3989 out_overflow:
3990         print_overflow_msg(__func__, xdr);
3991         return -EIO;
3992 }
3993
3994 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3995 {
3996         __be32 *p;
3997         int status = 0;
3998
3999         *res = 0;
4000         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4001                 return -EIO;
4002         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4003                 p = xdr_inline_decode(xdr, 8);
4004                 if (unlikely(!p))
4005                         goto out_overflow;
4006                 xdr_decode_hyper(p, res);
4007                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4008         }
4009         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4010         return status;
4011 out_overflow:
4012         print_overflow_msg(__func__, xdr);
4013         return -EIO;
4014 }
4015
4016 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4017 {
4018         __be32 *p;
4019         int status = 0;
4020
4021         *res = 0;
4022         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4023                 return -EIO;
4024         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4025                 p = xdr_inline_decode(xdr, 8);
4026                 if (unlikely(!p))
4027                         goto out_overflow;
4028                 xdr_decode_hyper(p, res);
4029                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4030         }
4031         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4032         return status;
4033 out_overflow:
4034         print_overflow_msg(__func__, xdr);
4035         return -EIO;
4036 }
4037
4038 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4039 {
4040         __be32 *p;
4041         int ret = 0;
4042
4043         *used = 0;
4044         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4045                 return -EIO;
4046         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4047                 p = xdr_inline_decode(xdr, 8);
4048                 if (unlikely(!p))
4049                         goto out_overflow;
4050                 xdr_decode_hyper(p, used);
4051                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4052                 ret = NFS_ATTR_FATTR_SPACE_USED;
4053         }
4054         dprintk("%s: space used=%Lu\n", __func__,
4055                         (unsigned long long)*used);
4056         return ret;
4057 out_overflow:
4058         print_overflow_msg(__func__, xdr);
4059         return -EIO;
4060 }
4061
4062 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4063 {
4064         __be32 *p;
4065         uint64_t sec;
4066         uint32_t nsec;
4067
4068         p = xdr_inline_decode(xdr, 12);
4069         if (unlikely(!p))
4070                 goto out_overflow;
4071         p = xdr_decode_hyper(p, &sec);
4072         nsec = be32_to_cpup(p);
4073         time->tv_sec = (time_t)sec;
4074         time->tv_nsec = (long)nsec;
4075         return 0;
4076 out_overflow:
4077         print_overflow_msg(__func__, xdr);
4078         return -EIO;
4079 }
4080
4081 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4082 {
4083         int status = 0;
4084
4085         time->tv_sec = 0;
4086         time->tv_nsec = 0;
4087         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4088                 return -EIO;
4089         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4090                 status = decode_attr_time(xdr, time);
4091                 if (status == 0)
4092                         status = NFS_ATTR_FATTR_ATIME;
4093                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4094         }
4095         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4096         return status;
4097 }
4098
4099 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4100 {
4101         int status = 0;
4102
4103         time->tv_sec = 0;
4104         time->tv_nsec = 0;
4105         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4106                 return -EIO;
4107         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4108                 status = decode_attr_time(xdr, time);
4109                 if (status == 0)
4110                         status = NFS_ATTR_FATTR_CTIME;
4111                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4112         }
4113         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4114         return status;
4115 }
4116
4117 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4118                                   struct timespec *time)
4119 {
4120         int status = 0;
4121
4122         time->tv_sec = 0;
4123         time->tv_nsec = 0;
4124         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4125                 return -EIO;
4126         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4127                 status = decode_attr_time(xdr, time);
4128                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4129         }
4130         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4131                 (long)time->tv_nsec);
4132         return status;
4133 }
4134
4135 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4136                                         struct nfs4_label *label)
4137 {
4138         uint32_t pi = 0;
4139         uint32_t lfs = 0;
4140         __u32 len;
4141         __be32 *p;
4142         int status = 0;
4143
4144         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4145                 return -EIO;
4146         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4147                 p = xdr_inline_decode(xdr, 4);
4148                 if (unlikely(!p))
4149                         goto out_overflow;
4150                 lfs = be32_to_cpup(p++);
4151                 p = xdr_inline_decode(xdr, 4);
4152                 if (unlikely(!p))
4153                         goto out_overflow;
4154                 pi = be32_to_cpup(p++);
4155                 p = xdr_inline_decode(xdr, 4);
4156                 if (unlikely(!p))
4157                         goto out_overflow;
4158                 len = be32_to_cpup(p++);
4159                 p = xdr_inline_decode(xdr, len);
4160                 if (unlikely(!p))
4161                         goto out_overflow;
4162                 if (len < NFS4_MAXLABELLEN) {
4163                         if (label) {
4164                                 if (label->len) {
4165                                         if (label->len < len)
4166                                                 return -ERANGE;
4167                                         memcpy(label->label, p, len);
4168                                 }
4169                                 label->len = len;
4170                                 label->pi = pi;
4171                                 label->lfs = lfs;
4172                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4173                         }
4174                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4175                 } else
4176                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4177                                         __func__, len);
4178                 if (label && label->label)
4179                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4180                                 __func__, label->len, (char *)label->label,
4181                                 label->len, label->pi, label->lfs);
4182         }
4183         return status;
4184
4185 out_overflow:
4186         print_overflow_msg(__func__, xdr);
4187         return -EIO;
4188 }
4189
4190 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4191 {
4192         int status = 0;
4193
4194         time->tv_sec = 0;
4195         time->tv_nsec = 0;
4196         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4197                 return -EIO;
4198         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4199                 status = decode_attr_time(xdr, time);
4200                 if (status == 0)
4201                         status = NFS_ATTR_FATTR_MTIME;
4202                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4203         }
4204         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4205         return status;
4206 }
4207
4208 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4209 {
4210         unsigned int attrwords = XDR_QUADLEN(attrlen);
4211         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4212
4213         if (unlikely(attrwords != nwords)) {
4214                 dprintk("%s: server returned incorrect attribute length: "
4215                         "%u %c %u\n",
4216                                 __func__,
4217                                 attrwords << 2,
4218                                 (attrwords < nwords) ? '<' : '>',
4219                                 nwords << 2);
4220                 return -EIO;
4221         }
4222         return 0;
4223 }
4224
4225 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4226 {
4227         __be32 *p;
4228
4229         p = xdr_inline_decode(xdr, 20);
4230         if (unlikely(!p))
4231                 goto out_overflow;
4232         cinfo->atomic = be32_to_cpup(p++);
4233         p = xdr_decode_hyper(p, &cinfo->before);
4234         xdr_decode_hyper(p, &cinfo->after);
4235         return 0;
4236 out_overflow:
4237         print_overflow_msg(__func__, xdr);
4238         return -EIO;
4239 }
4240
4241 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4242 {
4243         __be32 *p;
4244         uint32_t supp, acc;
4245         int status;
4246
4247         status = decode_op_hdr(xdr, OP_ACCESS);
4248         if (status)
4249                 return status;
4250         p = xdr_inline_decode(xdr, 8);
4251         if (unlikely(!p))
4252                 goto out_overflow;
4253         supp = be32_to_cpup(p++);
4254         acc = be32_to_cpup(p);
4255         *supported = supp;
4256         *access = acc;
4257         return 0;
4258 out_overflow:
4259         print_overflow_msg(__func__, xdr);
4260         return -EIO;
4261 }
4262
4263 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4264 {
4265         __be32 *p;
4266
4267         p = xdr_inline_decode(xdr, len);
4268         if (likely(p)) {
4269                 memcpy(buf, p, len);
4270                 return 0;
4271         }
4272         print_overflow_msg(__func__, xdr);
4273         return -EIO;
4274 }
4275
4276 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4277 {
4278         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4279 }
4280
4281 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4282 {
4283         stateid->type = NFS4_OPEN_STATEID_TYPE;
4284         return decode_stateid(xdr, stateid);
4285 }
4286
4287 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288 {
4289         stateid->type = NFS4_LOCK_STATEID_TYPE;
4290         return decode_stateid(xdr, stateid);
4291 }
4292
4293 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4294 {
4295         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4296         return decode_stateid(xdr, stateid);
4297 }
4298
4299 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4300 {
4301         int status;
4302
4303         status = decode_op_hdr(xdr, OP_CLOSE);
4304         if (status != -EIO)
4305                 nfs_increment_open_seqid(status, res->seqid);
4306         if (!status)
4307                 status = decode_open_stateid(xdr, &res->stateid);
4308         return status;
4309 }
4310
4311 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4312 {
4313         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4314 }
4315
4316 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4317 {
4318         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4319 }
4320
4321 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4322 {
4323         int status;
4324
4325         status = decode_op_hdr(xdr, OP_COMMIT);
4326         if (!status)
4327                 status = decode_write_verifier(xdr, &res->verf->verifier);
4328         return status;
4329 }
4330
4331 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4332 {
4333         __be32 *p;
4334         uint32_t bmlen;
4335         int status;
4336
4337         status = decode_op_hdr(xdr, OP_CREATE);
4338         if (status)
4339                 return status;
4340         if ((status = decode_change_info(xdr, cinfo)))
4341                 return status;
4342         p = xdr_inline_decode(xdr, 4);
4343         if (unlikely(!p))
4344                 goto out_overflow;
4345         bmlen = be32_to_cpup(p);
4346         p = xdr_inline_decode(xdr, bmlen << 2);
4347         if (likely(p))
4348                 return 0;
4349 out_overflow:
4350         print_overflow_msg(__func__, xdr);
4351         return -EIO;
4352 }
4353
4354 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4355 {
4356         unsigned int savep;
4357         uint32_t attrlen, bitmap[3] = {0};
4358         int status;
4359
4360         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4361                 goto xdr_error;
4362         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4365                 goto xdr_error;
4366         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4369                                                  &res->fh_expire_type)) != 0)
4370                 goto xdr_error;
4371         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4372                 goto xdr_error;
4373         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4374                 goto xdr_error;
4375         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4376                 goto xdr_error;
4377         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4378                                 res->exclcreat_bitmask)) != 0)
4379                 goto xdr_error;
4380         status = verify_attr_len(xdr, savep, attrlen);
4381 xdr_error:
4382         dprintk("%s: xdr returned %d!\n", __func__, -status);
4383         return status;
4384 }
4385
4386 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4387 {
4388         unsigned int savep;
4389         uint32_t attrlen, bitmap[3] = {0};
4390         int status;
4391
4392         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4397                 goto xdr_error;
4398
4399         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4404                 goto xdr_error;
4405
4406         status = -EIO;
4407         if (unlikely(bitmap[0]))
4408                 goto xdr_error;
4409
4410         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4411                 goto xdr_error;
4412         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4413                 goto xdr_error;
4414         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4415                 goto xdr_error;
4416
4417         status = verify_attr_len(xdr, savep, attrlen);
4418 xdr_error:
4419         dprintk("%s: xdr returned %d!\n", __func__, -status);
4420         return status;
4421 }
4422
4423 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4424 {
4425         unsigned int savep;
4426         uint32_t attrlen, bitmap[3] = {0};
4427         int status;
4428
4429         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4430                 goto xdr_error;
4431         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4432                 goto xdr_error;
4433         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4434                 goto xdr_error;
4435
4436         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4437                 goto xdr_error;
4438         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4439                 goto xdr_error;
4440
4441         status = verify_attr_len(xdr, savep, attrlen);
4442 xdr_error:
4443         dprintk("%s: xdr returned %d!\n", __func__, -status);
4444         return status;
4445 }
4446
4447 static int decode_threshold_hint(struct xdr_stream *xdr,
4448                                   uint32_t *bitmap,
4449                                   uint64_t *res,
4450                                   uint32_t hint_bit)
4451 {
4452         __be32 *p;
4453
4454         *res = 0;
4455         if (likely(bitmap[0] & hint_bit)) {
4456                 p = xdr_inline_decode(xdr, 8);
4457                 if (unlikely(!p))
4458                         goto out_overflow;
4459                 xdr_decode_hyper(p, res);
4460         }
4461         return 0;
4462 out_overflow:
4463         print_overflow_msg(__func__, xdr);
4464         return -EIO;
4465 }
4466
4467 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4468                                         struct nfs4_threshold *res)
4469 {
4470         __be32 *p;
4471         unsigned int savep;
4472         uint32_t bitmap[3] = {0,}, attrlen;
4473         int status;
4474
4475         /* layout type */
4476         p = xdr_inline_decode(xdr, 4);
4477         if (unlikely(!p)) {
4478                 print_overflow_msg(__func__, xdr);
4479                 return -EIO;
4480         }
4481         res->l_type = be32_to_cpup(p);
4482
4483         /* thi_hintset bitmap */
4484         status = decode_attr_bitmap(xdr, bitmap);
4485         if (status < 0)
4486                 goto xdr_error;
4487
4488         /* thi_hintlist length */
4489         status = decode_attr_length(xdr, &attrlen, &savep);
4490         if (status < 0)
4491                 goto xdr_error;
4492         /* thi_hintlist */
4493         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4494         if (status < 0)
4495                 goto xdr_error;
4496         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4497         if (status < 0)
4498                 goto xdr_error;
4499         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4500                                        THRESHOLD_RD_IO);
4501         if (status < 0)
4502                 goto xdr_error;
4503         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4504                                        THRESHOLD_WR_IO);
4505         if (status < 0)
4506                 goto xdr_error;
4507
4508         status = verify_attr_len(xdr, savep, attrlen);
4509         res->bm = bitmap[0];
4510
4511         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4512                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4513                 res->wr_io_sz);
4514 xdr_error:
4515         dprintk("%s ret=%d!\n", __func__, status);
4516         return status;
4517 }
4518
4519 /*
4520  * Thresholds on pNFS direct I/O vrs MDS I/O
4521  */
4522 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4523                                     uint32_t *bitmap,
4524                                     struct nfs4_threshold *res)
4525 {
4526         __be32 *p;
4527         int status = 0;
4528         uint32_t num;
4529
4530         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4531                 return -EIO;
4532         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4533                 /* Did the server return an unrequested attribute? */
4534                 if (unlikely(res == NULL))
4535                         return -EREMOTEIO;
4536                 p = xdr_inline_decode(xdr, 4);
4537                 if (unlikely(!p))
4538                         goto out_overflow;
4539                 num = be32_to_cpup(p);
4540                 if (num == 0)
4541                         return 0;
4542                 if (num > 1)
4543                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4544                                 "drivers per filesystem not supported\n",
4545                                 __func__);
4546
4547                 status = decode_first_threshold_item4(xdr, res);
4548                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4549         }
4550         return status;
4551 out_overflow:
4552         print_overflow_msg(__func__, xdr);
4553         return -EIO;
4554 }
4555
4556 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4557                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4558                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4559                 const struct nfs_server *server)
4560 {
4561         int status;
4562         umode_t fmode = 0;
4563         uint32_t type;
4564         int32_t err;
4565
4566         status = decode_attr_type(xdr, bitmap, &type);
4567         if (status < 0)
4568                 goto xdr_error;
4569         fattr->mode = 0;
4570         if (status != 0) {
4571                 fattr->mode |= nfs_type2fmt[type];
4572                 fattr->valid |= status;
4573         }
4574
4575         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4576         if (status < 0)
4577                 goto xdr_error;
4578         fattr->valid |= status;
4579
4580         status = decode_attr_size(xdr, bitmap, &fattr->size);
4581         if (status < 0)
4582                 goto xdr_error;
4583         fattr->valid |= status;
4584
4585         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4586         if (status < 0)
4587                 goto xdr_error;
4588         fattr->valid |= status;
4589
4590         err = 0;
4591         status = decode_attr_error(xdr, bitmap, &err);
4592         if (status < 0)
4593                 goto xdr_error;
4594
4595         status = decode_attr_filehandle(xdr, bitmap, fh);
4596         if (status < 0)
4597                 goto xdr_error;
4598
4599         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4600         if (status < 0)
4601                 goto xdr_error;
4602         fattr->valid |= status;
4603
4604         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4605         if (status < 0)
4606                 goto xdr_error;
4607         fattr->valid |= status;
4608
4609         status = -EIO;
4610         if (unlikely(bitmap[0]))
4611                 goto xdr_error;
4612
4613         status = decode_attr_mode(xdr, bitmap, &fmode);
4614         if (status < 0)
4615                 goto xdr_error;
4616         if (status != 0) {
4617                 fattr->mode |= fmode;
4618                 fattr->valid |= status;
4619         }
4620
4621         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4622         if (status < 0)
4623                 goto xdr_error;
4624         fattr->valid |= status;
4625
4626         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4627         if (status < 0)
4628                 goto xdr_error;
4629         fattr->valid |= status;
4630
4631         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635
4636         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4637         if (status < 0)
4638                 goto xdr_error;
4639         fattr->valid |= status;
4640
4641         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4642         if (status < 0)
4643                 goto xdr_error;
4644         fattr->valid |= status;
4645
4646         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4647         if (status < 0)
4648                 goto xdr_error;
4649         fattr->valid |= status;
4650
4651         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4652         if (status < 0)
4653                 goto xdr_error;
4654         fattr->valid |= status;
4655
4656         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4657         if (status < 0)
4658                 goto xdr_error;
4659         fattr->valid |= status;
4660
4661         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4662         if (status < 0)
4663                 goto xdr_error;
4664         fattr->valid |= status;
4665
4666         status = -EIO;
4667         if (unlikely(bitmap[1]))
4668                 goto xdr_error;
4669
4670         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4671         if (status < 0)
4672                 goto xdr_error;
4673
4674         if (label) {
4675                 status = decode_attr_security_label(xdr, bitmap, label);
4676                 if (status < 0)
4677                         goto xdr_error;
4678                 fattr->valid |= status;
4679         }
4680
4681 xdr_error:
4682         dprintk("%s: xdr returned %d\n", __func__, -status);
4683         return status;
4684 }
4685
4686 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4687                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4688                 struct nfs4_label *label, const struct nfs_server *server)
4689 {
4690         unsigned int savep;
4691         uint32_t attrlen,
4692                  bitmap[3] = {0};
4693         int status;
4694
4695         status = decode_op_hdr(xdr, OP_GETATTR);
4696         if (status < 0)
4697                 goto xdr_error;
4698
4699         status = decode_attr_bitmap(xdr, bitmap);
4700         if (status < 0)
4701                 goto xdr_error;
4702
4703         status = decode_attr_length(xdr, &attrlen, &savep);
4704         if (status < 0)
4705                 goto xdr_error;
4706
4707         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4708                                         label, server);
4709         if (status < 0)
4710                 goto xdr_error;
4711
4712         status = verify_attr_len(xdr, savep, attrlen);
4713 xdr_error:
4714         dprintk("%s: xdr returned %d\n", __func__, -status);
4715         return status;
4716 }
4717
4718 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719                 struct nfs4_label *label, const struct nfs_server *server)
4720 {
4721         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4722 }
4723
4724 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4725                 const struct nfs_server *server)
4726 {
4727         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4728 }
4729
4730 /*
4731  * Decode potentially multiple layout types.
4732  */
4733 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4734                                     struct nfs_fsinfo *fsinfo)
4735 {
4736         __be32 *p;
4737         uint32_t i;
4738
4739         p = xdr_inline_decode(xdr, 4);
4740         if (unlikely(!p))
4741                 goto out_overflow;
4742         fsinfo->nlayouttypes = be32_to_cpup(p);
4743
4744         /* pNFS is not supported by the underlying file system */
4745         if (fsinfo->nlayouttypes == 0)
4746                 return 0;
4747
4748         /* Decode and set first layout type, move xdr->p past unused types */
4749         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4750         if (unlikely(!p))
4751                 goto out_overflow;
4752
4753         /* If we get too many, then just cap it at the max */
4754         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4755                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4756                         __func__, fsinfo->nlayouttypes);
4757                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4758         }
4759
4760         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4761                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4762         return 0;
4763 out_overflow:
4764         print_overflow_msg(__func__, xdr);
4765         return -EIO;
4766 }
4767
4768 /*
4769  * The type of file system exported.
4770  * Note we must ensure that layouttype is set in any non-error case.
4771  */
4772 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4773                                 struct nfs_fsinfo *fsinfo)
4774 {
4775         int status = 0;
4776
4777         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4778         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4779                 return -EIO;
4780         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4781                 status = decode_pnfs_layout_types(xdr, fsinfo);
4782                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4783         }
4784         return status;
4785 }
4786
4787 /*
4788  * The prefered block size for layout directed io
4789  */
4790 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4791                                       uint32_t *res)
4792 {
4793         __be32 *p;
4794
4795         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4796         *res = 0;
4797         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4798                 p = xdr_inline_decode(xdr, 4);
4799                 if (unlikely(!p)) {
4800                         print_overflow_msg(__func__, xdr);
4801                         return -EIO;
4802                 }
4803                 *res = be32_to_cpup(p);
4804                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4805         }
4806         return 0;
4807 }
4808
4809 /*
4810  * The granularity of a CLONE operation.
4811  */
4812 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4813                                      uint32_t *res)
4814 {
4815         __be32 *p;
4816
4817         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4818         *res = 0;
4819         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4820                 p = xdr_inline_decode(xdr, 4);
4821                 if (unlikely(!p)) {
4822                         print_overflow_msg(__func__, xdr);
4823                         return -EIO;
4824                 }
4825                 *res = be32_to_cpup(p);
4826                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4827         }
4828         return 0;
4829 }
4830
4831 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4832 {
4833         unsigned int savep;
4834         uint32_t attrlen, bitmap[3];
4835         int status;
4836
4837         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4838                 goto xdr_error;
4839         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4840                 goto xdr_error;
4841         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4842                 goto xdr_error;
4843
4844         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4845
4846         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4847                 goto xdr_error;
4848         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4849                 goto xdr_error;
4850         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4851                 goto xdr_error;
4852         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4853         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4854                 goto xdr_error;
4855         fsinfo->wtpref = fsinfo->wtmax;
4856
4857         status = -EIO;
4858         if (unlikely(bitmap[0]))
4859                 goto xdr_error;
4860
4861         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4862         if (status != 0)
4863                 goto xdr_error;
4864         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4865         if (status != 0)
4866                 goto xdr_error;
4867
4868         status = -EIO;
4869         if (unlikely(bitmap[1]))
4870                 goto xdr_error;
4871
4872         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4873         if (status)
4874                 goto xdr_error;
4875         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4876         if (status)
4877                 goto xdr_error;
4878
4879         status = verify_attr_len(xdr, savep, attrlen);
4880 xdr_error:
4881         dprintk("%s: xdr returned %d!\n", __func__, -status);
4882         return status;
4883 }
4884
4885 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4886 {
4887         __be32 *p;
4888         uint32_t len;
4889         int status;
4890
4891         /* Zero handle first to allow comparisons */
4892         memset(fh, 0, sizeof(*fh));
4893
4894         status = decode_op_hdr(xdr, OP_GETFH);
4895         if (status)
4896                 return status;
4897
4898         p = xdr_inline_decode(xdr, 4);
4899         if (unlikely(!p))
4900                 goto out_overflow;
4901         len = be32_to_cpup(p);
4902         if (len > NFS4_FHSIZE)
4903                 return -EIO;
4904         fh->size = len;
4905         p = xdr_inline_decode(xdr, len);
4906         if (unlikely(!p))
4907                 goto out_overflow;
4908         memcpy(fh->data, p, len);
4909         return 0;
4910 out_overflow:
4911         print_overflow_msg(__func__, xdr);
4912         return -EIO;
4913 }
4914
4915 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4916 {
4917         int status;
4918
4919         status = decode_op_hdr(xdr, OP_LINK);
4920         if (status)
4921                 return status;
4922         return decode_change_info(xdr, cinfo);
4923 }
4924
4925 /*
4926  * We create the owner, so we know a proper owner.id length is 4.
4927  */
4928 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4929 {
4930         uint64_t offset, length, clientid;
4931         __be32 *p;
4932         uint32_t namelen, type;
4933
4934         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4935         if (unlikely(!p))
4936                 goto out_overflow;
4937         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4938         p = xdr_decode_hyper(p, &length);
4939         type = be32_to_cpup(p++); /* 4 byte read */
4940         if (fl != NULL) { /* manipulate file lock */
4941                 fl->fl_start = (loff_t)offset;
4942                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4943                 if (length == ~(uint64_t)0)
4944                         fl->fl_end = OFFSET_MAX;
4945                 fl->fl_type = F_WRLCK;
4946                 if (type & 1)
4947                         fl->fl_type = F_RDLCK;
4948                 fl->fl_pid = 0;
4949         }
4950         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4951         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4952         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4953         if (likely(p))
4954                 return -NFS4ERR_DENIED;
4955 out_overflow:
4956         print_overflow_msg(__func__, xdr);
4957         return -EIO;
4958 }
4959
4960 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4961 {
4962         int status;
4963
4964         status = decode_op_hdr(xdr, OP_LOCK);
4965         if (status == -EIO)
4966                 goto out;
4967         if (status == 0) {
4968                 status = decode_lock_stateid(xdr, &res->stateid);
4969                 if (unlikely(status))
4970                         goto out;
4971         } else if (status == -NFS4ERR_DENIED)
4972                 status = decode_lock_denied(xdr, NULL);
4973         if (res->open_seqid != NULL)
4974                 nfs_increment_open_seqid(status, res->open_seqid);
4975         nfs_increment_lock_seqid(status, res->lock_seqid);
4976 out:
4977         return status;
4978 }
4979
4980 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4981 {
4982         int status;
4983         status = decode_op_hdr(xdr, OP_LOCKT);
4984         if (status == -NFS4ERR_DENIED)
4985                 return decode_lock_denied(xdr, res->denied);
4986         return status;
4987 }
4988
4989 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4990 {
4991         int status;
4992
4993         status = decode_op_hdr(xdr, OP_LOCKU);
4994         if (status != -EIO)
4995                 nfs_increment_lock_seqid(status, res->seqid);
4996         if (status == 0)
4997                 status = decode_lock_stateid(xdr, &res->stateid);
4998         return status;
4999 }
5000
5001 static int decode_release_lockowner(struct xdr_stream *xdr)
5002 {
5003         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5004 }
5005
5006 static int decode_lookup(struct xdr_stream *xdr)
5007 {
5008         return decode_op_hdr(xdr, OP_LOOKUP);
5009 }
5010
5011 /* This is too sick! */
5012 static int decode_space_limit(struct xdr_stream *xdr,
5013                 unsigned long *pagemod_limit)
5014 {
5015         __be32 *p;
5016         uint32_t limit_type, nblocks, blocksize;
5017         u64 maxsize = 0;
5018
5019         p = xdr_inline_decode(xdr, 12);
5020         if (unlikely(!p))
5021                 goto out_overflow;
5022         limit_type = be32_to_cpup(p++);
5023         switch (limit_type) {
5024         case NFS4_LIMIT_SIZE:
5025                 xdr_decode_hyper(p, &maxsize);
5026                 break;
5027         case NFS4_LIMIT_BLOCKS:
5028                 nblocks = be32_to_cpup(p++);
5029                 blocksize = be32_to_cpup(p);
5030                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5031         }
5032         maxsize >>= PAGE_SHIFT;
5033         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5034         return 0;
5035 out_overflow:
5036         print_overflow_msg(__func__, xdr);
5037         return -EIO;
5038 }
5039
5040 static int decode_rw_delegation(struct xdr_stream *xdr,
5041                 uint32_t delegation_type,
5042                 struct nfs_openres *res)
5043 {
5044         __be32 *p;
5045         int status;
5046
5047         status = decode_delegation_stateid(xdr, &res->delegation);
5048         if (unlikely(status))
5049                 return status;
5050         p = xdr_inline_decode(xdr, 4);
5051         if (unlikely(!p))
5052                 goto out_overflow;
5053         res->do_recall = be32_to_cpup(p);
5054
5055         switch (delegation_type) {
5056         case NFS4_OPEN_DELEGATE_READ:
5057                 res->delegation_type = FMODE_READ;
5058                 break;
5059         case NFS4_OPEN_DELEGATE_WRITE:
5060                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5061                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5062                                 return -EIO;
5063         }
5064         return decode_ace(xdr, NULL, res->server->nfs_client);
5065 out_overflow:
5066         print_overflow_msg(__func__, xdr);
5067         return -EIO;
5068 }
5069
5070 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5071 {
5072         __be32 *p;
5073         uint32_t why_no_delegation;
5074
5075         p = xdr_inline_decode(xdr, 4);
5076         if (unlikely(!p))
5077                 goto out_overflow;
5078         why_no_delegation = be32_to_cpup(p);
5079         switch (why_no_delegation) {
5080                 case WND4_CONTENTION:
5081                 case WND4_RESOURCE:
5082                         xdr_inline_decode(xdr, 4);
5083                         /* Ignore for now */
5084         }
5085         return 0;
5086 out_overflow:
5087         print_overflow_msg(__func__, xdr);
5088         return -EIO;
5089 }
5090
5091 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5092 {
5093         __be32 *p;
5094         uint32_t delegation_type;
5095
5096         p = xdr_inline_decode(xdr, 4);
5097         if (unlikely(!p))
5098                 goto out_overflow;
5099         delegation_type = be32_to_cpup(p);
5100         res->delegation_type = 0;
5101         switch (delegation_type) {
5102         case NFS4_OPEN_DELEGATE_NONE:
5103                 return 0;
5104         case NFS4_OPEN_DELEGATE_READ:
5105         case NFS4_OPEN_DELEGATE_WRITE:
5106                 return decode_rw_delegation(xdr, delegation_type, res);
5107         case NFS4_OPEN_DELEGATE_NONE_EXT:
5108                 return decode_no_delegation(xdr, res);
5109         }
5110         return -EIO;
5111 out_overflow:
5112         print_overflow_msg(__func__, xdr);
5113         return -EIO;
5114 }
5115
5116 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5117 {
5118         __be32 *p;
5119         uint32_t savewords, bmlen, i;
5120         int status;
5121
5122         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5123                 return status;
5124         nfs_increment_open_seqid(status, res->seqid);
5125         if (status)
5126                 return status;
5127         status = decode_open_stateid(xdr, &res->stateid);
5128         if (unlikely(status))
5129                 return status;
5130
5131         decode_change_info(xdr, &res->cinfo);
5132
5133         p = xdr_inline_decode(xdr, 8);
5134         if (unlikely(!p))
5135                 goto out_overflow;
5136         res->rflags = be32_to_cpup(p++);
5137         bmlen = be32_to_cpup(p);
5138         if (bmlen > 10)
5139                 goto xdr_error;
5140
5141         p = xdr_inline_decode(xdr, bmlen << 2);
5142         if (unlikely(!p))
5143                 goto out_overflow;
5144         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5145         for (i = 0; i < savewords; ++i)
5146                 res->attrset[i] = be32_to_cpup(p++);
5147         for (; i < NFS4_BITMAP_SIZE; i++)
5148                 res->attrset[i] = 0;
5149
5150         return decode_delegation(xdr, res);
5151 xdr_error:
5152         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5153         return -EIO;
5154 out_overflow:
5155         print_overflow_msg(__func__, xdr);
5156         return -EIO;
5157 }
5158
5159 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5160 {
5161         int status;
5162
5163         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5164         if (status != -EIO)
5165                 nfs_increment_open_seqid(status, res->seqid);
5166         if (!status)
5167                 status = decode_open_stateid(xdr, &res->stateid);
5168         return status;
5169 }
5170
5171 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5172 {
5173         int status;
5174
5175         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5176         if (status != -EIO)
5177                 nfs_increment_open_seqid(status, res->seqid);
5178         if (!status)
5179                 status = decode_open_stateid(xdr, &res->stateid);
5180         return status;
5181 }
5182
5183 static int decode_putfh(struct xdr_stream *xdr)
5184 {
5185         return decode_op_hdr(xdr, OP_PUTFH);
5186 }
5187
5188 static int decode_putrootfh(struct xdr_stream *xdr)
5189 {
5190         return decode_op_hdr(xdr, OP_PUTROOTFH);
5191 }
5192
5193 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5194                        struct nfs_pgio_res *res)
5195 {
5196         __be32 *p;
5197         uint32_t count, eof, recvd;
5198         int status;
5199
5200         status = decode_op_hdr(xdr, OP_READ);
5201         if (status)
5202                 return status;
5203         p = xdr_inline_decode(xdr, 8);
5204         if (unlikely(!p))
5205                 goto out_overflow;
5206         eof = be32_to_cpup(p++);
5207         count = be32_to_cpup(p);
5208         recvd = xdr_read_pages(xdr, count);
5209         if (count > recvd) {
5210                 dprintk("NFS: server cheating in read reply: "
5211                                 "count %u > recvd %u\n", count, recvd);
5212                 count = recvd;
5213                 eof = 0;
5214         }
5215         res->eof = eof;
5216         res->count = count;
5217         return 0;
5218 out_overflow:
5219         print_overflow_msg(__func__, xdr);
5220         return -EIO;
5221 }
5222
5223 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5224 {
5225         int             status;
5226         __be32          verf[2];
5227
5228         status = decode_op_hdr(xdr, OP_READDIR);
5229         if (!status)
5230                 status = decode_verifier(xdr, readdir->verifier.data);
5231         if (unlikely(status))
5232                 return status;
5233         memcpy(verf, readdir->verifier.data, sizeof(verf));
5234         dprintk("%s: verifier = %08x:%08x\n",
5235                         __func__, verf[0], verf[1]);
5236         return xdr_read_pages(xdr, xdr->buf->page_len);
5237 }
5238
5239 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5240 {
5241         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5242         u32 len, recvd;
5243         __be32 *p;
5244         int status;
5245
5246         status = decode_op_hdr(xdr, OP_READLINK);
5247         if (status)
5248                 return status;
5249
5250         /* Convert length of symlink */
5251         p = xdr_inline_decode(xdr, 4);
5252         if (unlikely(!p))
5253                 goto out_overflow;
5254         len = be32_to_cpup(p);
5255         if (len >= rcvbuf->page_len || len <= 0) {
5256                 dprintk("nfs: server returned giant symlink!\n");
5257                 return -ENAMETOOLONG;
5258         }
5259         recvd = xdr_read_pages(xdr, len);
5260         if (recvd < len) {
5261                 dprintk("NFS: server cheating in readlink reply: "
5262                                 "count %u > recvd %u\n", len, recvd);
5263                 return -EIO;
5264         }
5265         /*
5266          * The XDR encode routine has set things up so that
5267          * the link text will be copied directly into the
5268          * buffer.  We just have to do overflow-checking,
5269          * and and null-terminate the text (the VFS expects
5270          * null-termination).
5271          */
5272         xdr_terminate_string(rcvbuf, len);
5273         return 0;
5274 out_overflow:
5275         print_overflow_msg(__func__, xdr);
5276         return -EIO;
5277 }
5278
5279 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5280 {
5281         int status;
5282
5283         status = decode_op_hdr(xdr, OP_REMOVE);
5284         if (status)
5285                 goto out;
5286         status = decode_change_info(xdr, cinfo);
5287 out:
5288         return status;
5289 }
5290
5291 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5292               struct nfs4_change_info *new_cinfo)
5293 {
5294         int status;
5295
5296         status = decode_op_hdr(xdr, OP_RENAME);
5297         if (status)
5298                 goto out;
5299         if ((status = decode_change_info(xdr, old_cinfo)))
5300                 goto out;
5301         status = decode_change_info(xdr, new_cinfo);
5302 out:
5303         return status;
5304 }
5305
5306 static int decode_renew(struct xdr_stream *xdr)
5307 {
5308         return decode_op_hdr(xdr, OP_RENEW);
5309 }
5310
5311 static int
5312 decode_restorefh(struct xdr_stream *xdr)
5313 {
5314         return decode_op_hdr(xdr, OP_RESTOREFH);
5315 }
5316
5317 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5318                          struct nfs_getaclres *res)
5319 {
5320         unsigned int savep;
5321         uint32_t attrlen,
5322                  bitmap[3] = {0};
5323         int status;
5324         unsigned int pg_offset;
5325
5326         res->acl_len = 0;
5327         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5328                 goto out;
5329
5330         xdr_enter_page(xdr, xdr->buf->page_len);
5331
5332         /* Calculate the offset of the page data */
5333         pg_offset = xdr->buf->head[0].iov_len;
5334
5335         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5336                 goto out;
5337         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5338                 goto out;
5339
5340         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5341                 return -EIO;
5342         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5343
5344                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5345                  * are stored with the acl data to handle the problem of
5346                  * variable length bitmaps.*/
5347                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5348                 res->acl_len = attrlen;
5349
5350                 /* Check for receive buffer overflow */
5351                 if (res->acl_len > (xdr->nwords << 2) ||
5352                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5353                         res->acl_flags |= NFS4_ACL_TRUNC;
5354                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5355                                         attrlen, xdr->nwords << 2);
5356                 }
5357         } else
5358                 status = -EOPNOTSUPP;
5359
5360 out:
5361         return status;
5362 }
5363
5364 static int
5365 decode_savefh(struct xdr_stream *xdr)
5366 {
5367         return decode_op_hdr(xdr, OP_SAVEFH);
5368 }
5369
5370 static int decode_setattr(struct xdr_stream *xdr)
5371 {
5372         __be32 *p;
5373         uint32_t bmlen;
5374         int status;
5375
5376         status = decode_op_hdr(xdr, OP_SETATTR);
5377         if (status)
5378                 return status;
5379         p = xdr_inline_decode(xdr, 4);
5380         if (unlikely(!p))
5381                 goto out_overflow;
5382         bmlen = be32_to_cpup(p);
5383         p = xdr_inline_decode(xdr, bmlen << 2);
5384         if (likely(p))
5385                 return 0;
5386 out_overflow:
5387         print_overflow_msg(__func__, xdr);
5388         return -EIO;
5389 }
5390
5391 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5392 {
5393         __be32 *p;
5394         uint32_t opnum;
5395         int32_t nfserr;
5396
5397         p = xdr_inline_decode(xdr, 8);
5398         if (unlikely(!p))
5399                 goto out_overflow;
5400         opnum = be32_to_cpup(p++);
5401         if (opnum != OP_SETCLIENTID) {
5402                 dprintk("nfs: decode_setclientid: Server returned operation"
5403                         " %d\n", opnum);
5404                 return -EIO;
5405         }
5406         nfserr = be32_to_cpup(p);
5407         if (nfserr == NFS_OK) {
5408                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5409                 if (unlikely(!p))
5410                         goto out_overflow;
5411                 p = xdr_decode_hyper(p, &res->clientid);
5412                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5413         } else if (nfserr == NFSERR_CLID_INUSE) {
5414                 uint32_t len;
5415
5416                 /* skip netid string */
5417                 p = xdr_inline_decode(xdr, 4);
5418                 if (unlikely(!p))
5419                         goto out_overflow;
5420                 len = be32_to_cpup(p);
5421                 p = xdr_inline_decode(xdr, len);
5422                 if (unlikely(!p))
5423                         goto out_overflow;
5424
5425                 /* skip uaddr string */
5426                 p = xdr_inline_decode(xdr, 4);
5427                 if (unlikely(!p))
5428                         goto out_overflow;
5429                 len = be32_to_cpup(p);
5430                 p = xdr_inline_decode(xdr, len);
5431                 if (unlikely(!p))
5432                         goto out_overflow;
5433                 return -NFSERR_CLID_INUSE;
5434         } else
5435                 return nfs4_stat_to_errno(nfserr);
5436
5437         return 0;
5438 out_overflow:
5439         print_overflow_msg(__func__, xdr);
5440         return -EIO;
5441 }
5442
5443 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5444 {
5445         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5446 }
5447
5448 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5449 {
5450         __be32 *p;
5451         int status;
5452
5453         status = decode_op_hdr(xdr, OP_WRITE);
5454         if (status)
5455                 return status;
5456
5457         p = xdr_inline_decode(xdr, 8);
5458         if (unlikely(!p))
5459                 goto out_overflow;
5460         res->count = be32_to_cpup(p++);
5461         res->verf->committed = be32_to_cpup(p++);
5462         return decode_write_verifier(xdr, &res->verf->verifier);
5463 out_overflow:
5464         print_overflow_msg(__func__, xdr);
5465         return -EIO;
5466 }
5467
5468 static int decode_delegreturn(struct xdr_stream *xdr)
5469 {
5470         return decode_op_hdr(xdr, OP_DELEGRETURN);
5471 }
5472
5473 static int decode_secinfo_gss(struct xdr_stream *xdr,
5474                               struct nfs4_secinfo4 *flavor)
5475 {
5476         u32 oid_len;
5477         __be32 *p;
5478
5479         p = xdr_inline_decode(xdr, 4);
5480         if (unlikely(!p))
5481                 goto out_overflow;
5482         oid_len = be32_to_cpup(p);
5483         if (oid_len > GSS_OID_MAX_LEN)
5484                 goto out_err;
5485
5486         p = xdr_inline_decode(xdr, oid_len);
5487         if (unlikely(!p))
5488                 goto out_overflow;
5489         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5490         flavor->flavor_info.oid.len = oid_len;
5491
5492         p = xdr_inline_decode(xdr, 8);
5493         if (unlikely(!p))
5494                 goto out_overflow;
5495         flavor->flavor_info.qop = be32_to_cpup(p++);
5496         flavor->flavor_info.service = be32_to_cpup(p);
5497
5498         return 0;
5499
5500 out_overflow:
5501         print_overflow_msg(__func__, xdr);
5502         return -EIO;
5503 out_err:
5504         return -EINVAL;
5505 }
5506
5507 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5508 {
5509         struct nfs4_secinfo4 *sec_flavor;
5510         unsigned int i, num_flavors;
5511         int status;
5512         __be32 *p;
5513
5514         p = xdr_inline_decode(xdr, 4);
5515         if (unlikely(!p))
5516                 goto out_overflow;
5517
5518         res->flavors->num_flavors = 0;
5519         num_flavors = be32_to_cpup(p);
5520
5521         for (i = 0; i < num_flavors; i++) {
5522                 sec_flavor = &res->flavors->flavors[i];
5523                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5524                         break;
5525
5526                 p = xdr_inline_decode(xdr, 4);
5527                 if (unlikely(!p))
5528                         goto out_overflow;
5529                 sec_flavor->flavor = be32_to_cpup(p);
5530
5531                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5532                         status = decode_secinfo_gss(xdr, sec_flavor);
5533                         if (status)
5534                                 goto out;
5535                 }
5536                 res->flavors->num_flavors++;
5537         }
5538
5539         status = 0;
5540 out:
5541         return status;
5542 out_overflow:
5543         print_overflow_msg(__func__, xdr);
5544         return -EIO;
5545 }
5546
5547 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5548 {
5549         int status = decode_op_hdr(xdr, OP_SECINFO);
5550         if (status)
5551                 return status;
5552         return decode_secinfo_common(xdr, res);
5553 }
5554
5555 #if defined(CONFIG_NFS_V4_1)
5556 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5557 {
5558         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5559         if (status)
5560                 return status;
5561         return decode_secinfo_common(xdr, res);
5562 }
5563
5564 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5565 {
5566         __be32 *p;
5567         uint32_t bitmap_words;
5568         unsigned int i;
5569
5570         p = xdr_inline_decode(xdr, 4);
5571         bitmap_words = be32_to_cpup(p++);
5572         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5573                 return -EIO;
5574         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5575         for (i = 0; i < bitmap_words; i++)
5576                 op_map->u.words[i] = be32_to_cpup(p++);
5577
5578         return 0;
5579 }
5580
5581 static int decode_exchange_id(struct xdr_stream *xdr,
5582                               struct nfs41_exchange_id_res *res)
5583 {
5584         __be32 *p;
5585         uint32_t dummy;
5586         char *dummy_str;
5587         int status;
5588         uint32_t impl_id_count;
5589
5590         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5591         if (status)
5592                 return status;
5593
5594         p = xdr_inline_decode(xdr, 8);
5595         if (unlikely(!p))
5596                 goto out_overflow;
5597         xdr_decode_hyper(p, &res->clientid);
5598         p = xdr_inline_decode(xdr, 12);
5599         if (unlikely(!p))
5600                 goto out_overflow;
5601         res->seqid = be32_to_cpup(p++);
5602         res->flags = be32_to_cpup(p++);
5603
5604         res->state_protect.how = be32_to_cpup(p);
5605         switch (res->state_protect.how) {
5606         case SP4_NONE:
5607                 break;
5608         case SP4_MACH_CRED:
5609                 status = decode_op_map(xdr, &res->state_protect.enforce);
5610                 if (status)
5611                         return status;
5612                 status = decode_op_map(xdr, &res->state_protect.allow);
5613                 if (status)
5614                         return status;
5615                 break;
5616         default:
5617                 WARN_ON_ONCE(1);
5618                 return -EIO;
5619         }
5620
5621         /* server_owner4.so_minor_id */
5622         p = xdr_inline_decode(xdr, 8);
5623         if (unlikely(!p))
5624                 goto out_overflow;
5625         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5626
5627         /* server_owner4.so_major_id */
5628         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5629         if (unlikely(status))
5630                 return status;
5631         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5632                 return -EIO;
5633         memcpy(res->server_owner->major_id, dummy_str, dummy);
5634         res->server_owner->major_id_sz = dummy;
5635
5636         /* server_scope4 */
5637         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5638         if (unlikely(status))
5639                 return status;
5640         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5641                 return -EIO;
5642         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5643         res->server_scope->server_scope_sz = dummy;
5644
5645         /* Implementation Id */
5646         p = xdr_inline_decode(xdr, 4);
5647         if (unlikely(!p))
5648                 goto out_overflow;
5649         impl_id_count = be32_to_cpup(p++);
5650
5651         if (impl_id_count) {
5652                 /* nii_domain */
5653                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5654                 if (unlikely(status))
5655                         return status;
5656                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5657                         return -EIO;
5658                 memcpy(res->impl_id->domain, dummy_str, dummy);
5659
5660                 /* nii_name */
5661                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5662                 if (unlikely(status))
5663                         return status;
5664                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5665                         return -EIO;
5666                 memcpy(res->impl_id->name, dummy_str, dummy);
5667
5668                 /* nii_date */
5669                 p = xdr_inline_decode(xdr, 12);
5670                 if (unlikely(!p))
5671                         goto out_overflow;
5672                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5673                 res->impl_id->date.nseconds = be32_to_cpup(p);
5674
5675                 /* if there's more than one entry, ignore the rest */
5676         }
5677         return 0;
5678 out_overflow:
5679         print_overflow_msg(__func__, xdr);
5680         return -EIO;
5681 }
5682
5683 static int decode_chan_attrs(struct xdr_stream *xdr,
5684                              struct nfs4_channel_attrs *attrs)
5685 {
5686         __be32 *p;
5687         u32 nr_attrs, val;
5688
5689         p = xdr_inline_decode(xdr, 28);
5690         if (unlikely(!p))
5691                 goto out_overflow;
5692         val = be32_to_cpup(p++);        /* headerpadsz */
5693         if (val)
5694                 return -EINVAL;         /* no support for header padding yet */
5695         attrs->max_rqst_sz = be32_to_cpup(p++);
5696         attrs->max_resp_sz = be32_to_cpup(p++);
5697         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5698         attrs->max_ops = be32_to_cpup(p++);
5699         attrs->max_reqs = be32_to_cpup(p++);
5700         nr_attrs = be32_to_cpup(p);
5701         if (unlikely(nr_attrs > 1)) {
5702                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5703                         "count %u\n", __func__, nr_attrs);
5704                 return -EINVAL;
5705         }
5706         if (nr_attrs == 1) {
5707                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5708                 if (unlikely(!p))
5709                         goto out_overflow;
5710         }
5711         return 0;
5712 out_overflow:
5713         print_overflow_msg(__func__, xdr);
5714         return -EIO;
5715 }
5716
5717 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5718 {
5719         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5720 }
5721
5722 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5723                                 struct nfs41_bind_conn_to_session_res *res)
5724 {
5725         __be32 *p;
5726         int status;
5727
5728         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5729         if (!status)
5730                 status = decode_sessionid(xdr, &res->sessionid);
5731         if (unlikely(status))
5732                 return status;
5733
5734         /* dir flags, rdma mode bool */
5735         p = xdr_inline_decode(xdr, 8);
5736         if (unlikely(!p))
5737                 goto out_overflow;
5738
5739         res->dir = be32_to_cpup(p++);
5740         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5741                 return -EIO;
5742         if (be32_to_cpup(p) == 0)
5743                 res->use_conn_in_rdma_mode = false;
5744         else
5745                 res->use_conn_in_rdma_mode = true;
5746
5747         return 0;
5748 out_overflow:
5749         print_overflow_msg(__func__, xdr);
5750         return -EIO;
5751 }
5752
5753 static int decode_create_session(struct xdr_stream *xdr,
5754                                  struct nfs41_create_session_res *res)
5755 {
5756         __be32 *p;
5757         int status;
5758
5759         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5760         if (!status)
5761                 status = decode_sessionid(xdr, &res->sessionid);
5762         if (unlikely(status))
5763                 return status;
5764
5765         /* seqid, flags */
5766         p = xdr_inline_decode(xdr, 8);
5767         if (unlikely(!p))
5768                 goto out_overflow;
5769         res->seqid = be32_to_cpup(p++);
5770         res->flags = be32_to_cpup(p);
5771
5772         /* Channel attributes */
5773         status = decode_chan_attrs(xdr, &res->fc_attrs);
5774         if (!status)
5775                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5776         return status;
5777 out_overflow:
5778         print_overflow_msg(__func__, xdr);
5779         return -EIO;
5780 }
5781
5782 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5783 {
5784         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5785 }
5786
5787 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5788 {
5789         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5790 }
5791
5792 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5793 {
5794         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5795 }
5796 #endif /* CONFIG_NFS_V4_1 */
5797
5798 static int decode_sequence(struct xdr_stream *xdr,
5799                            struct nfs4_sequence_res *res,
5800                            struct rpc_rqst *rqstp)
5801 {
5802 #if defined(CONFIG_NFS_V4_1)
5803         struct nfs4_session *session;
5804         struct nfs4_sessionid id;
5805         u32 dummy;
5806         int status;
5807         __be32 *p;
5808
5809         if (res->sr_slot == NULL)
5810                 return 0;
5811         if (!res->sr_slot->table->session)
5812                 return 0;
5813
5814         status = decode_op_hdr(xdr, OP_SEQUENCE);
5815         if (!status)
5816                 status = decode_sessionid(xdr, &id);
5817         if (unlikely(status))
5818                 goto out_err;
5819
5820         /*
5821          * If the server returns different values for sessionID, slotID or
5822          * sequence number, the server is looney tunes.
5823          */
5824         status = -EREMOTEIO;
5825         session = res->sr_slot->table->session;
5826
5827         if (memcmp(id.data, session->sess_id.data,
5828                    NFS4_MAX_SESSIONID_LEN)) {
5829                 dprintk("%s Invalid session id\n", __func__);
5830                 goto out_err;
5831         }
5832
5833         p = xdr_inline_decode(xdr, 20);
5834         if (unlikely(!p))
5835                 goto out_overflow;
5836
5837         /* seqid */
5838         dummy = be32_to_cpup(p++);
5839         if (dummy != res->sr_slot->seq_nr) {
5840                 dprintk("%s Invalid sequence number\n", __func__);
5841                 goto out_err;
5842         }
5843         /* slot id */
5844         dummy = be32_to_cpup(p++);
5845         if (dummy != res->sr_slot->slot_nr) {
5846                 dprintk("%s Invalid slot id\n", __func__);
5847                 goto out_err;
5848         }
5849         /* highest slot id */
5850         res->sr_highest_slotid = be32_to_cpup(p++);
5851         /* target highest slot id */
5852         res->sr_target_highest_slotid = be32_to_cpup(p++);
5853         /* result flags */
5854         res->sr_status_flags = be32_to_cpup(p);
5855         status = 0;
5856 out_err:
5857         res->sr_status = status;
5858         return status;
5859 out_overflow:
5860         print_overflow_msg(__func__, xdr);
5861         status = -EIO;
5862         goto out_err;
5863 #else  /* CONFIG_NFS_V4_1 */
5864         return 0;
5865 #endif /* CONFIG_NFS_V4_1 */
5866 }
5867
5868 #if defined(CONFIG_NFS_V4_1)
5869 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5870 {
5871         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5872         return decode_stateid(xdr, stateid);
5873 }
5874
5875 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5876                                 struct nfs4_getdeviceinfo_res *res)
5877 {
5878         struct pnfs_device *pdev = res->pdev;
5879         __be32 *p;
5880         uint32_t len, type;
5881         int status;
5882
5883         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5884         if (status) {
5885                 if (status == -ETOOSMALL) {
5886                         p = xdr_inline_decode(xdr, 4);
5887                         if (unlikely(!p))
5888                                 goto out_overflow;
5889                         pdev->mincount = be32_to_cpup(p);
5890                         dprintk("%s: Min count too small. mincnt = %u\n",
5891                                 __func__, pdev->mincount);
5892                 }
5893                 return status;
5894         }
5895
5896         p = xdr_inline_decode(xdr, 8);
5897         if (unlikely(!p))
5898                 goto out_overflow;
5899         type = be32_to_cpup(p++);
5900         if (type != pdev->layout_type) {
5901                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5902                         __func__, pdev->layout_type, type);
5903                 return -EINVAL;
5904         }
5905         /*
5906          * Get the length of the opaque device_addr4. xdr_read_pages places
5907          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5908          * and places the remaining xdr data in xdr_buf->tail
5909          */
5910         pdev->mincount = be32_to_cpup(p);
5911         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5912                 goto out_overflow;
5913
5914         /* Parse notification bitmap, verifying that it is zero. */
5915         p = xdr_inline_decode(xdr, 4);
5916         if (unlikely(!p))
5917                 goto out_overflow;
5918         len = be32_to_cpup(p);
5919         if (len) {
5920                 uint32_t i;
5921
5922                 p = xdr_inline_decode(xdr, 4 * len);
5923                 if (unlikely(!p))
5924                         goto out_overflow;
5925
5926                 res->notification = be32_to_cpup(p++);
5927                 for (i = 1; i < len; i++) {
5928                         if (be32_to_cpup(p++)) {
5929                                 dprintk("%s: unsupported notification\n",
5930                                         __func__);
5931                                 return -EIO;
5932                         }
5933                 }
5934         }
5935         return 0;
5936 out_overflow:
5937         print_overflow_msg(__func__, xdr);
5938         return -EIO;
5939 }
5940
5941 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5942                             struct nfs4_layoutget_res *res)
5943 {
5944         __be32 *p;
5945         int status;
5946         u32 layout_count;
5947         u32 recvd;
5948
5949         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5950         if (status)
5951                 return status;
5952         p = xdr_inline_decode(xdr, 4);
5953         if (unlikely(!p))
5954                 goto out_overflow;
5955         res->return_on_close = be32_to_cpup(p);
5956         decode_layout_stateid(xdr, &res->stateid);
5957         p = xdr_inline_decode(xdr, 4);
5958         if (unlikely(!p))
5959                 goto out_overflow;
5960         layout_count = be32_to_cpup(p);
5961         if (!layout_count) {
5962                 dprintk("%s: server responded with empty layout array\n",
5963                         __func__);
5964                 return -EINVAL;
5965         }
5966
5967         p = xdr_inline_decode(xdr, 28);
5968         if (unlikely(!p))
5969                 goto out_overflow;
5970         p = xdr_decode_hyper(p, &res->range.offset);
5971         p = xdr_decode_hyper(p, &res->range.length);
5972         res->range.iomode = be32_to_cpup(p++);
5973         res->type = be32_to_cpup(p++);
5974         res->layoutp->len = be32_to_cpup(p);
5975
5976         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5977                 __func__,
5978                 (unsigned long)res->range.offset,
5979                 (unsigned long)res->range.length,
5980                 res->range.iomode,
5981                 res->type,
5982                 res->layoutp->len);
5983
5984         recvd = xdr_read_pages(xdr, res->layoutp->len);
5985         if (res->layoutp->len > recvd) {
5986                 dprintk("NFS: server cheating in layoutget reply: "
5987                                 "layout len %u > recvd %u\n",
5988                                 res->layoutp->len, recvd);
5989                 return -EINVAL;
5990         }
5991
5992         if (layout_count > 1) {
5993                 /* We only handle a length one array at the moment.  Any
5994                  * further entries are just ignored.  Note that this means
5995                  * the client may see a response that is less than the
5996                  * minimum it requested.
5997                  */
5998                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5999                         __func__, layout_count);
6000         }
6001
6002         return 0;
6003 out_overflow:
6004         print_overflow_msg(__func__, xdr);
6005         return -EIO;
6006 }
6007
6008 static int decode_layoutreturn(struct xdr_stream *xdr,
6009                                struct nfs4_layoutreturn_res *res)
6010 {
6011         __be32 *p;
6012         int status;
6013
6014         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6015         if (status)
6016                 return status;
6017         p = xdr_inline_decode(xdr, 4);
6018         if (unlikely(!p))
6019                 goto out_overflow;
6020         res->lrs_present = be32_to_cpup(p);
6021         if (res->lrs_present)
6022                 status = decode_layout_stateid(xdr, &res->stateid);
6023         return status;
6024 out_overflow:
6025         print_overflow_msg(__func__, xdr);
6026         return -EIO;
6027 }
6028
6029 static int decode_layoutcommit(struct xdr_stream *xdr,
6030                                struct rpc_rqst *req,
6031                                struct nfs4_layoutcommit_res *res)
6032 {
6033         __be32 *p;
6034         __u32 sizechanged;
6035         int status;
6036
6037         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6038         res->status = status;
6039         if (status)
6040                 return status;
6041
6042         p = xdr_inline_decode(xdr, 4);
6043         if (unlikely(!p))
6044                 goto out_overflow;
6045         sizechanged = be32_to_cpup(p);
6046
6047         if (sizechanged) {
6048                 /* throw away new size */
6049                 p = xdr_inline_decode(xdr, 8);
6050                 if (unlikely(!p))
6051                         goto out_overflow;
6052         }
6053         return 0;
6054 out_overflow:
6055         print_overflow_msg(__func__, xdr);
6056         return -EIO;
6057 }
6058
6059 static int decode_test_stateid(struct xdr_stream *xdr,
6060                                struct nfs41_test_stateid_res *res)
6061 {
6062         __be32 *p;
6063         int status;
6064         int num_res;
6065
6066         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6067         if (status)
6068                 return status;
6069
6070         p = xdr_inline_decode(xdr, 4);
6071         if (unlikely(!p))
6072                 goto out_overflow;
6073         num_res = be32_to_cpup(p++);
6074         if (num_res != 1)
6075                 goto out;
6076
6077         p = xdr_inline_decode(xdr, 4);
6078         if (unlikely(!p))
6079                 goto out_overflow;
6080         res->status = be32_to_cpup(p++);
6081
6082         return status;
6083 out_overflow:
6084         print_overflow_msg(__func__, xdr);
6085 out:
6086         return -EIO;
6087 }
6088
6089 static int decode_free_stateid(struct xdr_stream *xdr,
6090                                struct nfs41_free_stateid_res *res)
6091 {
6092         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6093         return res->status;
6094 }
6095 #endif /* CONFIG_NFS_V4_1 */
6096
6097 /*
6098  * END OF "GENERIC" DECODE ROUTINES.
6099  */
6100
6101 /*
6102  * Decode OPEN_DOWNGRADE response
6103  */
6104 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6105                                        struct xdr_stream *xdr,
6106                                        struct nfs_closeres *res)
6107 {
6108         struct compound_hdr hdr;
6109         int status;
6110
6111         status = decode_compound_hdr(xdr, &hdr);
6112         if (status)
6113                 goto out;
6114         status = decode_sequence(xdr, &res->seq_res, rqstp);
6115         if (status)
6116                 goto out;
6117         status = decode_putfh(xdr);
6118         if (status)
6119                 goto out;
6120         status = decode_open_downgrade(xdr, res);
6121         if (status != 0)
6122                 goto out;
6123         decode_getfattr(xdr, res->fattr, res->server);
6124 out:
6125         return status;
6126 }
6127
6128 /*
6129  * Decode ACCESS response
6130  */
6131 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6132                                struct nfs4_accessres *res)
6133 {
6134         struct compound_hdr hdr;
6135         int status;
6136
6137         status = decode_compound_hdr(xdr, &hdr);
6138         if (status)
6139                 goto out;
6140         status = decode_sequence(xdr, &res->seq_res, rqstp);
6141         if (status)
6142                 goto out;
6143         status = decode_putfh(xdr);
6144         if (status != 0)
6145                 goto out;
6146         status = decode_access(xdr, &res->supported, &res->access);
6147         if (status != 0)
6148                 goto out;
6149         decode_getfattr(xdr, res->fattr, res->server);
6150 out:
6151         return status;
6152 }
6153
6154 /*
6155  * Decode LOOKUP response
6156  */
6157 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6158                                struct nfs4_lookup_res *res)
6159 {
6160         struct compound_hdr hdr;
6161         int status;
6162
6163         status = decode_compound_hdr(xdr, &hdr);
6164         if (status)
6165                 goto out;
6166         status = decode_sequence(xdr, &res->seq_res, rqstp);
6167         if (status)
6168                 goto out;
6169         status = decode_putfh(xdr);
6170         if (status)
6171                 goto out;
6172         status = decode_lookup(xdr);
6173         if (status)
6174                 goto out;
6175         status = decode_getfh(xdr, res->fh);
6176         if (status)
6177                 goto out;
6178         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6179 out:
6180         return status;
6181 }
6182
6183 /*
6184  * Decode LOOKUP_ROOT response
6185  */
6186 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6187                                     struct xdr_stream *xdr,
6188                                     struct nfs4_lookup_res *res)
6189 {
6190         struct compound_hdr hdr;
6191         int status;
6192
6193         status = decode_compound_hdr(xdr, &hdr);
6194         if (status)
6195                 goto out;
6196         status = decode_sequence(xdr, &res->seq_res, rqstp);
6197         if (status)
6198                 goto out;
6199         status = decode_putrootfh(xdr);
6200         if (status)
6201                 goto out;
6202         status = decode_getfh(xdr, res->fh);
6203         if (status == 0)
6204                 status = decode_getfattr_label(xdr, res->fattr,
6205                                                 res->label, res->server);
6206 out:
6207         return status;
6208 }
6209
6210 /*
6211  * Decode REMOVE response
6212  */
6213 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6214                                struct nfs_removeres *res)
6215 {
6216         struct compound_hdr hdr;
6217         int status;
6218
6219         status = decode_compound_hdr(xdr, &hdr);
6220         if (status)
6221                 goto out;
6222         status = decode_sequence(xdr, &res->seq_res, rqstp);
6223         if (status)
6224                 goto out;
6225         status = decode_putfh(xdr);
6226         if (status)
6227                 goto out;
6228         status = decode_remove(xdr, &res->cinfo);
6229 out:
6230         return status;
6231 }
6232
6233 /*
6234  * Decode RENAME response
6235  */
6236 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6237                                struct nfs_renameres *res)
6238 {
6239         struct compound_hdr hdr;
6240         int status;
6241
6242         status = decode_compound_hdr(xdr, &hdr);
6243         if (status)
6244                 goto out;
6245         status = decode_sequence(xdr, &res->seq_res, rqstp);
6246         if (status)
6247                 goto out;
6248         status = decode_putfh(xdr);
6249         if (status)
6250                 goto out;
6251         status = decode_savefh(xdr);
6252         if (status)
6253                 goto out;
6254         status = decode_putfh(xdr);
6255         if (status)
6256                 goto out;
6257         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6258 out:
6259         return status;
6260 }
6261
6262 /*
6263  * Decode LINK response
6264  */
6265 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6266                              struct nfs4_link_res *res)
6267 {
6268         struct compound_hdr hdr;
6269         int status;
6270
6271         status = decode_compound_hdr(xdr, &hdr);
6272         if (status)
6273                 goto out;
6274         status = decode_sequence(xdr, &res->seq_res, rqstp);
6275         if (status)
6276                 goto out;
6277         status = decode_putfh(xdr);
6278         if (status)
6279                 goto out;
6280         status = decode_savefh(xdr);
6281         if (status)
6282                 goto out;
6283         status = decode_putfh(xdr);
6284         if (status)
6285                 goto out;
6286         status = decode_link(xdr, &res->cinfo);
6287         if (status)
6288                 goto out;
6289         /*
6290          * Note order: OP_LINK leaves the directory as the current
6291          *             filehandle.
6292          */
6293         status = decode_restorefh(xdr);
6294         if (status)
6295                 goto out;
6296         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6297 out:
6298         return status;
6299 }
6300
6301 /*
6302  * Decode CREATE response
6303  */
6304 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6305                                struct nfs4_create_res *res)
6306 {
6307         struct compound_hdr hdr;
6308         int status;
6309
6310         status = decode_compound_hdr(xdr, &hdr);
6311         if (status)
6312                 goto out;
6313         status = decode_sequence(xdr, &res->seq_res, rqstp);
6314         if (status)
6315                 goto out;
6316         status = decode_putfh(xdr);
6317         if (status)
6318                 goto out;
6319         status = decode_create(xdr, &res->dir_cinfo);
6320         if (status)
6321                 goto out;
6322         status = decode_getfh(xdr, res->fh);
6323         if (status)
6324                 goto out;
6325         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6326 out:
6327         return status;
6328 }
6329
6330 /*
6331  * Decode SYMLINK response
6332  */
6333 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6334                                 struct nfs4_create_res *res)
6335 {
6336         return nfs4_xdr_dec_create(rqstp, xdr, res);
6337 }
6338
6339 /*
6340  * Decode GETATTR response
6341  */
6342 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6343                                 struct nfs4_getattr_res *res)
6344 {
6345         struct compound_hdr hdr;
6346         int status;
6347
6348         status = decode_compound_hdr(xdr, &hdr);
6349         if (status)
6350                 goto out;
6351         status = decode_sequence(xdr, &res->seq_res, rqstp);
6352         if (status)
6353                 goto out;
6354         status = decode_putfh(xdr);
6355         if (status)
6356                 goto out;
6357         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6358 out:
6359         return status;
6360 }
6361
6362 /*
6363  * Encode an SETACL request
6364  */
6365 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6366                                 struct nfs_setaclargs *args)
6367 {
6368         struct compound_hdr hdr = {
6369                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6370         };
6371
6372         encode_compound_hdr(xdr, req, &hdr);
6373         encode_sequence(xdr, &args->seq_args, &hdr);
6374         encode_putfh(xdr, args->fh, &hdr);
6375         encode_setacl(xdr, args, &hdr);
6376         encode_nops(&hdr);
6377 }
6378
6379 /*
6380  * Decode SETACL response
6381  */
6382 static int
6383 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6384                     struct nfs_setaclres *res)
6385 {
6386         struct compound_hdr hdr;
6387         int status;
6388
6389         status = decode_compound_hdr(xdr, &hdr);
6390         if (status)
6391                 goto out;
6392         status = decode_sequence(xdr, &res->seq_res, rqstp);
6393         if (status)
6394                 goto out;
6395         status = decode_putfh(xdr);
6396         if (status)
6397                 goto out;
6398         status = decode_setattr(xdr);
6399 out:
6400         return status;
6401 }
6402
6403 /*
6404  * Decode GETACL response
6405  */
6406 static int
6407 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6408                     struct nfs_getaclres *res)
6409 {
6410         struct compound_hdr hdr;
6411         int status;
6412
6413         if (res->acl_scratch != NULL) {
6414                 void *p = page_address(res->acl_scratch);
6415                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6416         }
6417         status = decode_compound_hdr(xdr, &hdr);
6418         if (status)
6419                 goto out;
6420         status = decode_sequence(xdr, &res->seq_res, rqstp);
6421         if (status)
6422                 goto out;
6423         status = decode_putfh(xdr);
6424         if (status)
6425                 goto out;
6426         status = decode_getacl(xdr, rqstp, res);
6427
6428 out:
6429         return status;
6430 }
6431
6432 /*
6433  * Decode CLOSE response
6434  */
6435 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6436                               struct nfs_closeres *res)
6437 {
6438         struct compound_hdr hdr;
6439         int status;
6440
6441         status = decode_compound_hdr(xdr, &hdr);
6442         if (status)
6443                 goto out;
6444         status = decode_sequence(xdr, &res->seq_res, rqstp);
6445         if (status)
6446                 goto out;
6447         status = decode_putfh(xdr);
6448         if (status)
6449                 goto out;
6450         status = decode_close(xdr, res);
6451         if (status != 0)
6452                 goto out;
6453         /*
6454          * Note: Server may do delete on close for this file
6455          *      in which case the getattr call will fail with
6456          *      an ESTALE error. Shouldn't be a problem,
6457          *      though, since fattr->valid will remain unset.
6458          */
6459         decode_getfattr(xdr, res->fattr, res->server);
6460 out:
6461         return status;
6462 }
6463
6464 /*
6465  * Decode OPEN response
6466  */
6467 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468                              struct nfs_openres *res)
6469 {
6470         struct compound_hdr hdr;
6471         int status;
6472
6473         status = decode_compound_hdr(xdr, &hdr);
6474         if (status)
6475                 goto out;
6476         status = decode_sequence(xdr, &res->seq_res, rqstp);
6477         if (status)
6478                 goto out;
6479         status = decode_putfh(xdr);
6480         if (status)
6481                 goto out;
6482         status = decode_open(xdr, res);
6483         if (status)
6484                 goto out;
6485         status = decode_getfh(xdr, &res->fh);
6486         if (status)
6487                 goto out;
6488         if (res->access_request)
6489                 decode_access(xdr, &res->access_supported, &res->access_result);
6490         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6491 out:
6492         return status;
6493 }
6494
6495 /*
6496  * Decode OPEN_CONFIRM response
6497  */
6498 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6499                                      struct xdr_stream *xdr,
6500                                      struct nfs_open_confirmres *res)
6501 {
6502         struct compound_hdr hdr;
6503         int status;
6504
6505         status = decode_compound_hdr(xdr, &hdr);
6506         if (status)
6507                 goto out;
6508         status = decode_putfh(xdr);
6509         if (status)
6510                 goto out;
6511         status = decode_open_confirm(xdr, res);
6512 out:
6513         return status;
6514 }
6515
6516 /*
6517  * Decode OPEN response
6518  */
6519 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6520                                     struct xdr_stream *xdr,
6521                                     struct nfs_openres *res)
6522 {
6523         struct compound_hdr hdr;
6524         int status;
6525
6526         status = decode_compound_hdr(xdr, &hdr);
6527         if (status)
6528                 goto out;
6529         status = decode_sequence(xdr, &res->seq_res, rqstp);
6530         if (status)
6531                 goto out;
6532         status = decode_putfh(xdr);
6533         if (status)
6534                 goto out;
6535         status = decode_open(xdr, res);
6536         if (status)
6537                 goto out;
6538         if (res->access_request)
6539                 decode_access(xdr, &res->access_supported, &res->access_result);
6540         decode_getfattr(xdr, res->f_attr, res->server);
6541 out:
6542         return status;
6543 }
6544
6545 /*
6546  * Decode SETATTR response
6547  */
6548 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6549                                 struct xdr_stream *xdr,
6550                                 struct nfs_setattrres *res)
6551 {
6552         struct compound_hdr hdr;
6553         int status;
6554
6555         status = decode_compound_hdr(xdr, &hdr);
6556         if (status)
6557                 goto out;
6558         status = decode_sequence(xdr, &res->seq_res, rqstp);
6559         if (status)
6560                 goto out;
6561         status = decode_putfh(xdr);
6562         if (status)
6563                 goto out;
6564         status = decode_setattr(xdr);
6565         if (status)
6566                 goto out;
6567         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6568 out:
6569         return status;
6570 }
6571
6572 /*
6573  * Decode LOCK response
6574  */
6575 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6576                              struct nfs_lock_res *res)
6577 {
6578         struct compound_hdr hdr;
6579         int status;
6580
6581         status = decode_compound_hdr(xdr, &hdr);
6582         if (status)
6583                 goto out;
6584         status = decode_sequence(xdr, &res->seq_res, rqstp);
6585         if (status)
6586                 goto out;
6587         status = decode_putfh(xdr);
6588         if (status)
6589                 goto out;
6590         status = decode_lock(xdr, res);
6591 out:
6592         return status;
6593 }
6594
6595 /*
6596  * Decode LOCKT response
6597  */
6598 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6599                               struct nfs_lockt_res *res)
6600 {
6601         struct compound_hdr hdr;
6602         int status;
6603
6604         status = decode_compound_hdr(xdr, &hdr);
6605         if (status)
6606                 goto out;
6607         status = decode_sequence(xdr, &res->seq_res, rqstp);
6608         if (status)
6609                 goto out;
6610         status = decode_putfh(xdr);
6611         if (status)
6612                 goto out;
6613         status = decode_lockt(xdr, res);
6614 out:
6615         return status;
6616 }
6617
6618 /*
6619  * Decode LOCKU response
6620  */
6621 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6622                               struct nfs_locku_res *res)
6623 {
6624         struct compound_hdr hdr;
6625         int status;
6626
6627         status = decode_compound_hdr(xdr, &hdr);
6628         if (status)
6629                 goto out;
6630         status = decode_sequence(xdr, &res->seq_res, rqstp);
6631         if (status)
6632                 goto out;
6633         status = decode_putfh(xdr);
6634         if (status)
6635                 goto out;
6636         status = decode_locku(xdr, res);
6637 out:
6638         return status;
6639 }
6640
6641 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6642                                           struct xdr_stream *xdr, void *dummy)
6643 {
6644         struct compound_hdr hdr;
6645         int status;
6646
6647         status = decode_compound_hdr(xdr, &hdr);
6648         if (!status)
6649                 status = decode_release_lockowner(xdr);
6650         return status;
6651 }
6652
6653 /*
6654  * Decode READLINK response
6655  */
6656 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6657                                  struct xdr_stream *xdr,
6658                                  struct nfs4_readlink_res *res)
6659 {
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (status)
6665                 goto out;
6666         status = decode_sequence(xdr, &res->seq_res, rqstp);
6667         if (status)
6668                 goto out;
6669         status = decode_putfh(xdr);
6670         if (status)
6671                 goto out;
6672         status = decode_readlink(xdr, rqstp);
6673 out:
6674         return status;
6675 }
6676
6677 /*
6678  * Decode READDIR response
6679  */
6680 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6681                                 struct nfs4_readdir_res *res)
6682 {
6683         struct compound_hdr hdr;
6684         int status;
6685
6686         status = decode_compound_hdr(xdr, &hdr);
6687         if (status)
6688                 goto out;
6689         status = decode_sequence(xdr, &res->seq_res, rqstp);
6690         if (status)
6691                 goto out;
6692         status = decode_putfh(xdr);
6693         if (status)
6694                 goto out;
6695         status = decode_readdir(xdr, rqstp, res);
6696 out:
6697         return status;
6698 }
6699
6700 /*
6701  * Decode Read response
6702  */
6703 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6704                              struct nfs_pgio_res *res)
6705 {
6706         struct compound_hdr hdr;
6707         int status;
6708
6709         status = decode_compound_hdr(xdr, &hdr);
6710         res->op_status = hdr.status;
6711         if (status)
6712                 goto out;
6713         status = decode_sequence(xdr, &res->seq_res, rqstp);
6714         if (status)
6715                 goto out;
6716         status = decode_putfh(xdr);
6717         if (status)
6718                 goto out;
6719         status = decode_read(xdr, rqstp, res);
6720         if (!status)
6721                 status = res->count;
6722 out:
6723         return status;
6724 }
6725
6726 /*
6727  * Decode WRITE response
6728  */
6729 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6730                               struct nfs_pgio_res *res)
6731 {
6732         struct compound_hdr hdr;
6733         int status;
6734
6735         status = decode_compound_hdr(xdr, &hdr);
6736         res->op_status = hdr.status;
6737         if (status)
6738                 goto out;
6739         status = decode_sequence(xdr, &res->seq_res, rqstp);
6740         if (status)
6741                 goto out;
6742         status = decode_putfh(xdr);
6743         if (status)
6744                 goto out;
6745         status = decode_write(xdr, res);
6746         if (status)
6747                 goto out;
6748         if (res->fattr)
6749                 decode_getfattr(xdr, res->fattr, res->server);
6750         if (!status)
6751                 status = res->count;
6752 out:
6753         return status;
6754 }
6755
6756 /*
6757  * Decode COMMIT response
6758  */
6759 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6760                                struct nfs_commitres *res)
6761 {
6762         struct compound_hdr hdr;
6763         int status;
6764
6765         status = decode_compound_hdr(xdr, &hdr);
6766         res->op_status = hdr.status;
6767         if (status)
6768                 goto out;
6769         status = decode_sequence(xdr, &res->seq_res, rqstp);
6770         if (status)
6771                 goto out;
6772         status = decode_putfh(xdr);
6773         if (status)
6774                 goto out;
6775         status = decode_commit(xdr, res);
6776 out:
6777         return status;
6778 }
6779
6780 /*
6781  * Decode FSINFO response
6782  */
6783 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6784                                struct nfs4_fsinfo_res *res)
6785 {
6786         struct compound_hdr hdr;
6787         int status;
6788
6789         status = decode_compound_hdr(xdr, &hdr);
6790         if (!status)
6791                 status = decode_sequence(xdr, &res->seq_res, req);
6792         if (!status)
6793                 status = decode_putfh(xdr);
6794         if (!status)
6795                 status = decode_fsinfo(xdr, res->fsinfo);
6796         return status;
6797 }
6798
6799 /*
6800  * Decode PATHCONF response
6801  */
6802 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6803                                  struct nfs4_pathconf_res *res)
6804 {
6805         struct compound_hdr hdr;
6806         int status;
6807
6808         status = decode_compound_hdr(xdr, &hdr);
6809         if (!status)
6810                 status = decode_sequence(xdr, &res->seq_res, req);
6811         if (!status)
6812                 status = decode_putfh(xdr);
6813         if (!status)
6814                 status = decode_pathconf(xdr, res->pathconf);
6815         return status;
6816 }
6817
6818 /*
6819  * Decode STATFS response
6820  */
6821 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6822                                struct nfs4_statfs_res *res)
6823 {
6824         struct compound_hdr hdr;
6825         int status;
6826
6827         status = decode_compound_hdr(xdr, &hdr);
6828         if (!status)
6829                 status = decode_sequence(xdr, &res->seq_res, req);
6830         if (!status)
6831                 status = decode_putfh(xdr);
6832         if (!status)
6833                 status = decode_statfs(xdr, res->fsstat);
6834         return status;
6835 }
6836
6837 /*
6838  * Decode GETATTR_BITMAP response
6839  */
6840 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6841                                     struct xdr_stream *xdr,
6842                                     struct nfs4_server_caps_res *res)
6843 {
6844         struct compound_hdr hdr;
6845         int status;
6846
6847         status = decode_compound_hdr(xdr, &hdr);
6848         if (status)
6849                 goto out;
6850         status = decode_sequence(xdr, &res->seq_res, req);
6851         if (status)
6852                 goto out;
6853         status = decode_putfh(xdr);
6854         if (status)
6855                 goto out;
6856         status = decode_server_caps(xdr, res);
6857 out:
6858         return status;
6859 }
6860
6861 /*
6862  * Decode RENEW response
6863  */
6864 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6865                               void *__unused)
6866 {
6867         struct compound_hdr hdr;
6868         int status;
6869
6870         status = decode_compound_hdr(xdr, &hdr);
6871         if (!status)
6872                 status = decode_renew(xdr);
6873         return status;
6874 }
6875
6876 /*
6877  * Decode SETCLIENTID response
6878  */
6879 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6880                                     struct xdr_stream *xdr,
6881                                     struct nfs4_setclientid_res *res)
6882 {
6883         struct compound_hdr hdr;
6884         int status;
6885
6886         status = decode_compound_hdr(xdr, &hdr);
6887         if (!status)
6888                 status = decode_setclientid(xdr, res);
6889         return status;
6890 }
6891
6892 /*
6893  * Decode SETCLIENTID_CONFIRM response
6894  */
6895 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6896                                             struct xdr_stream *xdr)
6897 {
6898         struct compound_hdr hdr;
6899         int status;
6900
6901         status = decode_compound_hdr(xdr, &hdr);
6902         if (!status)
6903                 status = decode_setclientid_confirm(xdr);
6904         return status;
6905 }
6906
6907 /*
6908  * Decode DELEGRETURN response
6909  */
6910 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6911                                     struct xdr_stream *xdr,
6912                                     struct nfs4_delegreturnres *res)
6913 {
6914         struct compound_hdr hdr;
6915         int status;
6916
6917         status = decode_compound_hdr(xdr, &hdr);
6918         if (status)
6919                 goto out;
6920         status = decode_sequence(xdr, &res->seq_res, rqstp);
6921         if (status)
6922                 goto out;
6923         status = decode_putfh(xdr);
6924         if (status != 0)
6925                 goto out;
6926         status = decode_getfattr(xdr, res->fattr, res->server);
6927         if (status != 0)
6928                 goto out;
6929         status = decode_delegreturn(xdr);
6930 out:
6931         return status;
6932 }
6933
6934 /*
6935  * Decode FS_LOCATIONS response
6936  */
6937 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6938                                      struct xdr_stream *xdr,
6939                                      struct nfs4_fs_locations_res *res)
6940 {
6941         struct compound_hdr hdr;
6942         int status;
6943
6944         status = decode_compound_hdr(xdr, &hdr);
6945         if (status)
6946                 goto out;
6947         status = decode_sequence(xdr, &res->seq_res, req);
6948         if (status)
6949                 goto out;
6950         status = decode_putfh(xdr);
6951         if (status)
6952                 goto out;
6953         if (res->migration) {
6954                 xdr_enter_page(xdr, PAGE_SIZE);
6955                 status = decode_getfattr_generic(xdr,
6956                                         &res->fs_locations->fattr,
6957                                          NULL, res->fs_locations,
6958                                          NULL, res->fs_locations->server);
6959                 if (status)
6960                         goto out;
6961                 if (res->renew)
6962                         status = decode_renew(xdr);
6963         } else {
6964                 status = decode_lookup(xdr);
6965                 if (status)
6966                         goto out;
6967                 xdr_enter_page(xdr, PAGE_SIZE);
6968                 status = decode_getfattr_generic(xdr,
6969                                         &res->fs_locations->fattr,
6970                                          NULL, res->fs_locations,
6971                                          NULL, res->fs_locations->server);
6972         }
6973 out:
6974         return status;
6975 }
6976
6977 /*
6978  * Decode SECINFO response
6979  */
6980 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6981                                 struct xdr_stream *xdr,
6982                                 struct nfs4_secinfo_res *res)
6983 {
6984         struct compound_hdr hdr;
6985         int status;
6986
6987         status = decode_compound_hdr(xdr, &hdr);
6988         if (status)
6989                 goto out;
6990         status = decode_sequence(xdr, &res->seq_res, rqstp);
6991         if (status)
6992                 goto out;
6993         status = decode_putfh(xdr);
6994         if (status)
6995                 goto out;
6996         status = decode_secinfo(xdr, res);
6997 out:
6998         return status;
6999 }
7000
7001 /*
7002  * Decode FSID_PRESENT response
7003  */
7004 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7005                                      struct xdr_stream *xdr,
7006                                      struct nfs4_fsid_present_res *res)
7007 {
7008         struct compound_hdr hdr;
7009         int status;
7010
7011         status = decode_compound_hdr(xdr, &hdr);
7012         if (status)
7013                 goto out;
7014         status = decode_sequence(xdr, &res->seq_res, rqstp);
7015         if (status)
7016                 goto out;
7017         status = decode_putfh(xdr);
7018         if (status)
7019                 goto out;
7020         status = decode_getfh(xdr, res->fh);
7021         if (status)
7022                 goto out;
7023         if (res->renew)
7024                 status = decode_renew(xdr);
7025 out:
7026         return status;
7027 }
7028
7029 #if defined(CONFIG_NFS_V4_1)
7030 /*
7031  * Decode BIND_CONN_TO_SESSION response
7032  */
7033 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7034                                         struct xdr_stream *xdr,
7035                                         void *res)
7036 {
7037         struct compound_hdr hdr;
7038         int status;
7039
7040         status = decode_compound_hdr(xdr, &hdr);
7041         if (!status)
7042                 status = decode_bind_conn_to_session(xdr, res);
7043         return status;
7044 }
7045
7046 /*
7047  * Decode EXCHANGE_ID response
7048  */
7049 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7050                                     struct xdr_stream *xdr,
7051                                     void *res)
7052 {
7053         struct compound_hdr hdr;
7054         int status;
7055
7056         status = decode_compound_hdr(xdr, &hdr);
7057         if (!status)
7058                 status = decode_exchange_id(xdr, res);
7059         return status;
7060 }
7061
7062 /*
7063  * Decode CREATE_SESSION response
7064  */
7065 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7066                                        struct xdr_stream *xdr,
7067                                        struct nfs41_create_session_res *res)
7068 {
7069         struct compound_hdr hdr;
7070         int status;
7071
7072         status = decode_compound_hdr(xdr, &hdr);
7073         if (!status)
7074                 status = decode_create_session(xdr, res);
7075         return status;
7076 }
7077
7078 /*
7079  * Decode DESTROY_SESSION response
7080  */
7081 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7082                                         struct xdr_stream *xdr,
7083                                         void *res)
7084 {
7085         struct compound_hdr hdr;
7086         int status;
7087
7088         status = decode_compound_hdr(xdr, &hdr);
7089         if (!status)
7090                 status = decode_destroy_session(xdr, res);
7091         return status;
7092 }
7093
7094 /*
7095  * Decode DESTROY_CLIENTID response
7096  */
7097 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7098                                         struct xdr_stream *xdr,
7099                                         void *res)
7100 {
7101         struct compound_hdr hdr;
7102         int status;
7103
7104         status = decode_compound_hdr(xdr, &hdr);
7105         if (!status)
7106                 status = decode_destroy_clientid(xdr, res);
7107         return status;
7108 }
7109
7110 /*
7111  * Decode SEQUENCE response
7112  */
7113 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7114                                  struct xdr_stream *xdr,
7115                                  struct nfs4_sequence_res *res)
7116 {
7117         struct compound_hdr hdr;
7118         int status;
7119
7120         status = decode_compound_hdr(xdr, &hdr);
7121         if (!status)
7122                 status = decode_sequence(xdr, res, rqstp);
7123         return status;
7124 }
7125
7126 /*
7127  * Decode GET_LEASE_TIME response
7128  */
7129 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7130                                        struct xdr_stream *xdr,
7131                                        struct nfs4_get_lease_time_res *res)
7132 {
7133         struct compound_hdr hdr;
7134         int status;
7135
7136         status = decode_compound_hdr(xdr, &hdr);
7137         if (!status)
7138                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7139         if (!status)
7140                 status = decode_putrootfh(xdr);
7141         if (!status)
7142                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7143         return status;
7144 }
7145
7146 /*
7147  * Decode RECLAIM_COMPLETE response
7148  */
7149 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7150                                          struct xdr_stream *xdr,
7151                                          struct nfs41_reclaim_complete_res *res)
7152 {
7153         struct compound_hdr hdr;
7154         int status;
7155
7156         status = decode_compound_hdr(xdr, &hdr);
7157         if (!status)
7158                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7159         if (!status)
7160                 status = decode_reclaim_complete(xdr, NULL);
7161         return status;
7162 }
7163
7164 /*
7165  * Decode GETDEVINFO response
7166  */
7167 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7168                                       struct xdr_stream *xdr,
7169                                       struct nfs4_getdeviceinfo_res *res)
7170 {
7171         struct compound_hdr hdr;
7172         int status;
7173
7174         status = decode_compound_hdr(xdr, &hdr);
7175         if (status != 0)
7176                 goto out;
7177         status = decode_sequence(xdr, &res->seq_res, rqstp);
7178         if (status != 0)
7179                 goto out;
7180         status = decode_getdeviceinfo(xdr, res);
7181 out:
7182         return status;
7183 }
7184
7185 /*
7186  * Decode LAYOUTGET response
7187  */
7188 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7189                                   struct xdr_stream *xdr,
7190                                   struct nfs4_layoutget_res *res)
7191 {
7192         struct compound_hdr hdr;
7193         int status;
7194
7195         status = decode_compound_hdr(xdr, &hdr);
7196         if (status)
7197                 goto out;
7198         status = decode_sequence(xdr, &res->seq_res, rqstp);
7199         if (status)
7200                 goto out;
7201         status = decode_putfh(xdr);
7202         if (status)
7203                 goto out;
7204         status = decode_layoutget(xdr, rqstp, res);
7205 out:
7206         return status;
7207 }
7208
7209 /*
7210  * Decode LAYOUTRETURN response
7211  */
7212 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7213                                      struct xdr_stream *xdr,
7214                                      struct nfs4_layoutreturn_res *res)
7215 {
7216         struct compound_hdr hdr;
7217         int status;
7218
7219         status = decode_compound_hdr(xdr, &hdr);
7220         if (status)
7221                 goto out;
7222         status = decode_sequence(xdr, &res->seq_res, rqstp);
7223         if (status)
7224                 goto out;
7225         status = decode_putfh(xdr);
7226         if (status)
7227                 goto out;
7228         status = decode_layoutreturn(xdr, res);
7229 out:
7230         return status;
7231 }
7232
7233 /*
7234  * Decode LAYOUTCOMMIT response
7235  */
7236 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7237                                      struct xdr_stream *xdr,
7238                                      struct nfs4_layoutcommit_res *res)
7239 {
7240         struct compound_hdr hdr;
7241         int status;
7242
7243         status = decode_compound_hdr(xdr, &hdr);
7244         if (status)
7245                 goto out;
7246         status = decode_sequence(xdr, &res->seq_res, rqstp);
7247         if (status)
7248                 goto out;
7249         status = decode_putfh(xdr);
7250         if (status)
7251                 goto out;
7252         status = decode_layoutcommit(xdr, rqstp, res);
7253         if (status)
7254                 goto out;
7255         decode_getfattr(xdr, res->fattr, res->server);
7256 out:
7257         return status;
7258 }
7259
7260 /*
7261  * Decode SECINFO_NO_NAME response
7262  */
7263 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7264                                         struct xdr_stream *xdr,
7265                                         struct nfs4_secinfo_res *res)
7266 {
7267         struct compound_hdr hdr;
7268         int status;
7269
7270         status = decode_compound_hdr(xdr, &hdr);
7271         if (status)
7272                 goto out;
7273         status = decode_sequence(xdr, &res->seq_res, rqstp);
7274         if (status)
7275                 goto out;
7276         status = decode_putrootfh(xdr);
7277         if (status)
7278                 goto out;
7279         status = decode_secinfo_no_name(xdr, res);
7280 out:
7281         return status;
7282 }
7283
7284 /*
7285  * Decode TEST_STATEID response
7286  */
7287 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7288                                      struct xdr_stream *xdr,
7289                                      struct nfs41_test_stateid_res *res)
7290 {
7291         struct compound_hdr hdr;
7292         int status;
7293
7294         status = decode_compound_hdr(xdr, &hdr);
7295         if (status)
7296                 goto out;
7297         status = decode_sequence(xdr, &res->seq_res, rqstp);
7298         if (status)
7299                 goto out;
7300         status = decode_test_stateid(xdr, res);
7301 out:
7302         return status;
7303 }
7304
7305 /*
7306  * Decode FREE_STATEID response
7307  */
7308 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7309                                      struct xdr_stream *xdr,
7310                                      struct nfs41_free_stateid_res *res)
7311 {
7312         struct compound_hdr hdr;
7313         int status;
7314
7315         status = decode_compound_hdr(xdr, &hdr);
7316         if (status)
7317                 goto out;
7318         status = decode_sequence(xdr, &res->seq_res, rqstp);
7319         if (status)
7320                 goto out;
7321         status = decode_free_stateid(xdr, res);
7322 out:
7323         return status;
7324 }
7325 #endif /* CONFIG_NFS_V4_1 */
7326
7327 /**
7328  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7329  *                      the local page cache.
7330  * @xdr: XDR stream where entry resides
7331  * @entry: buffer to fill in with entry data
7332  * @plus: boolean indicating whether this should be a readdirplus entry
7333  *
7334  * Returns zero if successful, otherwise a negative errno value is
7335  * returned.
7336  *
7337  * This function is not invoked during READDIR reply decoding, but
7338  * rather whenever an application invokes the getdents(2) system call
7339  * on a directory already in our cache.
7340  */
7341 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7342                        int plus)
7343 {
7344         unsigned int savep;
7345         uint32_t bitmap[3] = {0};
7346         uint32_t len;
7347         __be32 *p = xdr_inline_decode(xdr, 4);
7348         if (unlikely(!p))
7349                 goto out_overflow;
7350         if (*p == xdr_zero) {
7351                 p = xdr_inline_decode(xdr, 4);
7352                 if (unlikely(!p))
7353                         goto out_overflow;
7354                 if (*p == xdr_zero)
7355                         return -EAGAIN;
7356                 entry->eof = 1;
7357                 return -EBADCOOKIE;
7358         }
7359
7360         p = xdr_inline_decode(xdr, 12);
7361         if (unlikely(!p))
7362                 goto out_overflow;
7363         entry->prev_cookie = entry->cookie;
7364         p = xdr_decode_hyper(p, &entry->cookie);
7365         entry->len = be32_to_cpup(p);
7366
7367         p = xdr_inline_decode(xdr, entry->len);
7368         if (unlikely(!p))
7369                 goto out_overflow;
7370         entry->name = (const char *) p;
7371
7372         /*
7373          * In case the server doesn't return an inode number,
7374          * we fake one here.  (We don't use inode number 0,
7375          * since glibc seems to choke on it...)
7376          */
7377         entry->ino = 1;
7378         entry->fattr->valid = 0;
7379
7380         if (decode_attr_bitmap(xdr, bitmap) < 0)
7381                 goto out_overflow;
7382
7383         if (decode_attr_length(xdr, &len, &savep) < 0)
7384                 goto out_overflow;
7385
7386         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7387                         NULL, entry->label, entry->server) < 0)
7388                 goto out_overflow;
7389         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7390                 entry->ino = entry->fattr->mounted_on_fileid;
7391         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7392                 entry->ino = entry->fattr->fileid;
7393
7394         entry->d_type = DT_UNKNOWN;
7395         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7396                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7397
7398         return 0;
7399
7400 out_overflow:
7401         print_overflow_msg(__func__, xdr);
7402         return -EAGAIN;
7403 }
7404
7405 /*
7406  * We need to translate between nfs status return values and
7407  * the local errno values which may not be the same.
7408  */
7409 static struct {
7410         int stat;
7411         int errno;
7412 } nfs_errtbl[] = {
7413         { NFS4_OK,              0               },
7414         { NFS4ERR_PERM,         -EPERM          },
7415         { NFS4ERR_NOENT,        -ENOENT         },
7416         { NFS4ERR_IO,           -errno_NFSERR_IO},
7417         { NFS4ERR_NXIO,         -ENXIO          },
7418         { NFS4ERR_ACCESS,       -EACCES         },
7419         { NFS4ERR_EXIST,        -EEXIST         },
7420         { NFS4ERR_XDEV,         -EXDEV          },
7421         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7422         { NFS4ERR_ISDIR,        -EISDIR         },
7423         { NFS4ERR_INVAL,        -EINVAL         },
7424         { NFS4ERR_FBIG,         -EFBIG          },
7425         { NFS4ERR_NOSPC,        -ENOSPC         },
7426         { NFS4ERR_ROFS,         -EROFS          },
7427         { NFS4ERR_MLINK,        -EMLINK         },
7428         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7429         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7430         { NFS4ERR_DQUOT,        -EDQUOT         },
7431         { NFS4ERR_STALE,        -ESTALE         },
7432         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7433         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7434         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7435         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7436         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7437         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7438         { NFS4ERR_LOCKED,       -EAGAIN         },
7439         { NFS4ERR_SYMLINK,      -ELOOP          },
7440         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7441         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7442         { -1,                   -EIO            }
7443 };
7444
7445 /*
7446  * Convert an NFS error code to a local one.
7447  * This one is used jointly by NFSv2 and NFSv3.
7448  */
7449 static int
7450 nfs4_stat_to_errno(int stat)
7451 {
7452         int i;
7453         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7454                 if (nfs_errtbl[i].stat == stat)
7455                         return nfs_errtbl[i].errno;
7456         }
7457         if (stat <= 10000 || stat > 10100) {
7458                 /* The server is looney tunes. */
7459                 return -EREMOTEIO;
7460         }
7461         /* If we cannot translate the error, the recovery routines should
7462          * handle it.
7463          * Note: remaining NFSv4 error codes have values > 10000, so should
7464          * not conflict with native Linux error codes.
7465          */
7466         return -stat;
7467 }
7468
7469 #ifdef CONFIG_NFS_V4_2
7470 #include "nfs42xdr.c"
7471 #endif /* CONFIG_NFS_V4_2 */
7472
7473 #define PROC(proc, argtype, restype)                            \
7474 [NFSPROC4_CLNT_##proc] = {                                      \
7475         .p_proc   = NFSPROC4_COMPOUND,                          \
7476         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7477         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7478         .p_arglen = NFS4_##argtype##_sz,                        \
7479         .p_replen = NFS4_##restype##_sz,                        \
7480         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7481         .p_name   = #proc,                                      \
7482 }
7483
7484 #define STUB(proc)              \
7485 [NFSPROC4_CLNT_##proc] = {      \
7486         .p_name = #proc,        \
7487 }
7488
7489 struct rpc_procinfo     nfs4_procedures[] = {
7490         PROC(READ,              enc_read,               dec_read),
7491         PROC(WRITE,             enc_write,              dec_write),
7492         PROC(COMMIT,            enc_commit,             dec_commit),
7493         PROC(OPEN,              enc_open,               dec_open),
7494         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7495         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7496         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7497         PROC(CLOSE,             enc_close,              dec_close),
7498         PROC(SETATTR,           enc_setattr,            dec_setattr),
7499         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7500         PROC(RENEW,             enc_renew,              dec_renew),
7501         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7502         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7503         PROC(LOCK,              enc_lock,               dec_lock),
7504         PROC(LOCKT,             enc_lockt,              dec_lockt),
7505         PROC(LOCKU,             enc_locku,              dec_locku),
7506         PROC(ACCESS,            enc_access,             dec_access),
7507         PROC(GETATTR,           enc_getattr,            dec_getattr),
7508         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7509         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7510         PROC(REMOVE,            enc_remove,             dec_remove),
7511         PROC(RENAME,            enc_rename,             dec_rename),
7512         PROC(LINK,              enc_link,               dec_link),
7513         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7514         PROC(CREATE,            enc_create,             dec_create),
7515         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7516         PROC(STATFS,            enc_statfs,             dec_statfs),
7517         PROC(READLINK,          enc_readlink,           dec_readlink),
7518         PROC(READDIR,           enc_readdir,            dec_readdir),
7519         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7520         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7521         PROC(GETACL,            enc_getacl,             dec_getacl),
7522         PROC(SETACL,            enc_setacl,             dec_setacl),
7523         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7524         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7525         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7526         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7527 #if defined(CONFIG_NFS_V4_1)
7528         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7529         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7530         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7531         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7532         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7533         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7534         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7535         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7536         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7537         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7538         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7539         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7540         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7541         STUB(GETDEVICELIST),
7542         PROC(BIND_CONN_TO_SESSION,
7543                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7544         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7545 #endif /* CONFIG_NFS_V4_1 */
7546 #ifdef CONFIG_NFS_V4_2
7547         PROC(SEEK,              enc_seek,               dec_seek),
7548         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7549         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7550         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7551         PROC(CLONE,             enc_clone,              dec_clone),
7552         PROC(COPY,              enc_copy,               dec_copy),
7553 #endif /* CONFIG_NFS_V4_2 */
7554 };
7555
7556 const struct rpc_version nfs_version4 = {
7557         .number                 = 4,
7558         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7559         .procs                  = nfs4_procedures
7560 };
7561
7562 /*
7563  * Local variables:
7564  *  c-basic-offset: 8
7565  * End:
7566  */