fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #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                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 143                                 1 /* sc_prog */ + \
 144                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                 1) /* sc_cb_ident */
 147 #define decode_setclientid_maxsz \
 148                                 (op_decode_hdr_maxsz + \
 149                                 2 /* clientid */ + \
 150                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 151                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 152                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 153 #define encode_setclientid_confirm_maxsz \
 154                                 (op_encode_hdr_maxsz + \
 155                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 156 #define decode_setclientid_confirm_maxsz \
 157                                 (op_decode_hdr_maxsz)
 158 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 159 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 160 #define encode_share_access_maxsz \
 161                                 (2)
 162 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 163 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 164 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 165 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 166                                 2 + encode_share_access_maxsz + 2 + \
 167                                 open_owner_id_maxsz + \
 168                                 encode_opentype_maxsz + \
 169                                 encode_claim_null_maxsz)
 170 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 171 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 172                                 decode_ace_maxsz)
 173 #define decode_change_info_maxsz        (5)
 174 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 175                                 decode_stateid_maxsz + \
 176                                 decode_change_info_maxsz + 1 + \
 177                                 nfs4_fattr_bitmap_maxsz + \
 178                                 decode_delegation_maxsz)
 179 #define encode_open_confirm_maxsz \
 180                                 (op_encode_hdr_maxsz + \
 181                                  encode_stateid_maxsz + 1)
 182 #define decode_open_confirm_maxsz \
 183                                 (op_decode_hdr_maxsz + \
 184                                  decode_stateid_maxsz)
 185 #define encode_open_downgrade_maxsz \
 186                                 (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 1 + \
 188                                  encode_share_access_maxsz)
 189 #define decode_open_downgrade_maxsz \
 190                                 (op_decode_hdr_maxsz + \
 191                                  decode_stateid_maxsz)
 192 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 193                                  1 + encode_stateid_maxsz)
 194 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 195                                  decode_stateid_maxsz)
 196 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 197                                  encode_stateid_maxsz + \
 198                                  encode_attrs_maxsz)
 199 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 200                                  nfs4_fattr_bitmap_maxsz)
 201 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 202                                  encode_stateid_maxsz + 3)
 203 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 204 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 205                                  2 + encode_verifier_maxsz + 5 + \
 206                                 nfs4_label_maxsz)
 207 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 208                                  decode_verifier_maxsz)
 209 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 210 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 211 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 212                                  encode_stateid_maxsz + 4)
 213 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 214                                  2 + decode_verifier_maxsz)
 215 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 216 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 217                                  decode_verifier_maxsz)
 218 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 219                                 nfs4_name_maxsz)
 220 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 221                                  decode_change_info_maxsz)
 222 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 223                                 2 * nfs4_name_maxsz)
 224 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 225                                  decode_change_info_maxsz + \
 226                                  decode_change_info_maxsz)
 227 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 228                                 nfs4_name_maxsz)
 229 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 230 #define encode_lockowner_maxsz  (7)
 231 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 232                                  7 + \
 233                                  1 + encode_stateid_maxsz + 1 + \
 234                                  encode_lockowner_maxsz)
 235 #define decode_lock_denied_maxsz \
 236                                 (8 + decode_lockowner_maxsz)
 237 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 238                                  decode_lock_denied_maxsz)
 239 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 240                                 encode_lockowner_maxsz)
 241 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 242                                  decode_lock_denied_maxsz)
 243 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 244                                  encode_stateid_maxsz + \
 245                                  4)
 246 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 247                                  decode_stateid_maxsz)
 248 #define encode_release_lockowner_maxsz \
 249                                 (op_encode_hdr_maxsz + \
 250                                  encode_lockowner_maxsz)
 251 #define decode_release_lockowner_maxsz \
 252                                 (op_decode_hdr_maxsz)
 253 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 254 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 255 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 256                                 1 + nfs4_name_maxsz + \
 257                                 1 + \
 258                                 nfs4_fattr_maxsz)
 259 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 260 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 261                                 1 + 2 + nfs4_name_maxsz + \
 262                                 encode_attrs_maxsz)
 263 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 264                                 decode_change_info_maxsz + \
 265                                 nfs4_fattr_bitmap_maxsz)
 266 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 267 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 268 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 269 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 270 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 271 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 272                                  nfs4_fattr_bitmap_maxsz + 1)
 273 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 274                                  encode_stateid_maxsz + 3)
 275 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 276 #define encode_fs_locations_maxsz \
 277                                 (encode_getattr_maxsz)
 278 #define decode_fs_locations_maxsz \
 279                                 (0)
 280 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 281 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 282
 283 #if defined(CONFIG_NFS_V4_1)
 284 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 285 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 286                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 287
 288 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 289                                 encode_verifier_maxsz + \
 290                                 1 /* co_ownerid.len */ + \
 291                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 292                                 1 /* flags */ + \
 293                                 1 /* spa_how */ + \
 294                                 /* max is SP4_MACH_CRED (for now) */ + \
 295                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 296                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 297                                 1 /* implementation id array of size 1 */ + \
 298                                 1 /* nii_domain */ + \
 299                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 300                                 1 /* nii_name */ + \
 301                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 302                                 3 /* nii_date */)
 303 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 304                                 2 /* eir_clientid */ + \
 305                                 1 /* eir_sequenceid */ + \
 306                                 1 /* eir_flags */ + \
 307                                 1 /* spr_how */ + \
 308                                   /* max is SP4_MACH_CRED (for now) */ + \
 309                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 310                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 311                                 2 /* eir_server_owner.so_minor_id */ + \
 312                                 /* eir_server_owner.so_major_id<> */ \
 313                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                 /* eir_server_scope<> */ \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                 1 /* eir_server_impl_id array length */ + \
 317                                 1 /* nii_domain */ + \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 1 /* nii_name */ + \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                 3 /* nii_date */)
 322 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 323 #define decode_channel_attrs_maxsz  (6 + \
 324                                      1 /* ca_rdma_ird.len */ + \
 325                                      1 /* ca_rdma_ird */)
 326 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 327                                      2 /* csa_clientid */ + \
 328                                      1 /* csa_sequence */ + \
 329                                      1 /* csa_flags */ + \
 330                                      encode_channel_attrs_maxsz + \
 331                                      encode_channel_attrs_maxsz + \
 332                                      1 /* csa_cb_program */ + \
 333                                      1 /* csa_sec_parms.len (1) */ + \
 334                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 335                                      1 /* stamp */ + \
 336                                      1 /* machinename.len */ + \
 337                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 338                                      1 /* uid */ + \
 339                                      1 /* gid */ + \
 340                                      1 /* gids.len (0) */)
 341 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 342                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 343                                      1 /* csr_sequence */ + \
 344                                      1 /* csr_flags */ + \
 345                                      decode_channel_attrs_maxsz + \
 346                                      decode_channel_attrs_maxsz)
 347 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 348                                      /* bctsa_sessid */ \
 349                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 350                                      1 /* bctsa_dir */ + \
 351                                      1 /* bctsa_use_conn_in_rdma_mode */)
 352 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 353                                      /* bctsr_sessid */ \
 354                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 355                                      1 /* bctsr_dir */ + \
 356                                      1 /* bctsr_use_conn_in_rdma_mode */)
 357 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 358 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 359 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 360 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 361 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 362                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 363 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 364                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 365 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 366 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 367 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 368                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 369                                 1 /* layout type */ + \
 370                                 1 /* maxcount */ + \
 371                                 1 /* bitmap size */ + \
 372                                 1 /* notification bitmap length */ + \
 373                                 1 /* notification bitmap, word 0 */)
 374 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 375                                 1 /* layout type */ + \
 376                                 1 /* opaque devaddr4 length */ + \
 377                                   /* devaddr4 payload is read into page */ \
 378                                 1 /* notification bitmap length */ + \
 379                                 1 /* notification bitmap, word 0 */)
 380 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 381                                 encode_stateid_maxsz)
 382 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 383                                 decode_stateid_maxsz + \
 384                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 385 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 386                                 2 /* offset */ + \
 387                                 2 /* length */ + \
 388                                 1 /* reclaim */ + \
 389                                 encode_stateid_maxsz + \
 390                                 1 /* new offset (true) */ + \
 391                                 2 /* last byte written */ + \
 392                                 1 /* nt_timechanged (false) */ + \
 393                                 1 /* layoutupdate4 layout type */ + \
 394                                 1 /* layoutupdate4 opaqueue len */)
 395                                   /* the actual content of layoutupdate4 should
 396                                      be allocated by drivers and spliced in
 397                                      using xdr_write_pages */
 398 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 399 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 400                                 encode_stateid_maxsz + \
 401                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 402 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 403                                 1 + decode_stateid_maxsz)
 404 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 405 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 406 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 407                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 408 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 409 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 410                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 411 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 412 #else /* CONFIG_NFS_V4_1 */
 413 #define encode_sequence_maxsz   0
 414 #define decode_sequence_maxsz   0
 415 #endif /* CONFIG_NFS_V4_1 */
 416
 417 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 418 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 419 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 420                                 encode_sequence_maxsz + \
 421                                 encode_putfh_maxsz + \
 422                                 encode_read_maxsz)
 423 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 424                                 decode_sequence_maxsz + \
 425                                 decode_putfh_maxsz + \
 426                                 decode_read_maxsz)
 427 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 428                                 encode_sequence_maxsz + \
 429                                 encode_putfh_maxsz + \
 430                                 encode_readlink_maxsz)
 431 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 432                                 decode_sequence_maxsz + \
 433                                 decode_putfh_maxsz + \
 434                                 decode_readlink_maxsz)
 435 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 436                                 encode_sequence_maxsz + \
 437                                 encode_putfh_maxsz + \
 438                                 encode_readdir_maxsz)
 439 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 440                                 decode_sequence_maxsz + \
 441                                 decode_putfh_maxsz + \
 442                                 decode_readdir_maxsz)
 443 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 444                                 encode_sequence_maxsz + \
 445                                 encode_putfh_maxsz + \
 446                                 encode_write_maxsz + \
 447                                 encode_getattr_maxsz)
 448 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 449                                 decode_sequence_maxsz + \
 450                                 decode_putfh_maxsz + \
 451                                 decode_write_maxsz + \
 452                                 decode_getattr_maxsz)
 453 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 454                                 encode_sequence_maxsz + \
 455                                 encode_putfh_maxsz + \
 456                                 encode_commit_maxsz)
 457 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 458                                 decode_sequence_maxsz + \
 459                                 decode_putfh_maxsz + \
 460                                 decode_commit_maxsz)
 461 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_open_maxsz + \
 465                                 encode_access_maxsz + \
 466                                 encode_getfh_maxsz + \
 467                                 encode_getattr_maxsz)
 468 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_open_maxsz + \
 472                                 decode_access_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz)
 475 #define NFS4_enc_open_confirm_sz \
 476                                 (compound_encode_hdr_maxsz + \
 477                                  encode_putfh_maxsz + \
 478                                  encode_open_confirm_maxsz)
 479 #define NFS4_dec_open_confirm_sz \
 480                                 (compound_decode_hdr_maxsz + \
 481                                  decode_putfh_maxsz + \
 482                                  decode_open_confirm_maxsz)
 483 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 484                                         encode_sequence_maxsz + \
 485                                         encode_putfh_maxsz + \
 486                                         encode_open_maxsz + \
 487                                         encode_access_maxsz + \
 488                                         encode_getattr_maxsz)
 489 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 490                                         decode_sequence_maxsz + \
 491                                         decode_putfh_maxsz + \
 492                                         decode_open_maxsz + \
 493                                         decode_access_maxsz + \
 494                                         decode_getattr_maxsz)
 495 #define NFS4_enc_open_downgrade_sz \
 496                                 (compound_encode_hdr_maxsz + \
 497                                  encode_sequence_maxsz + \
 498                                  encode_putfh_maxsz + \
 499                                  encode_open_downgrade_maxsz + \
 500                                  encode_getattr_maxsz)
 501 #define NFS4_dec_open_downgrade_sz \
 502                                 (compound_decode_hdr_maxsz + \
 503                                  decode_sequence_maxsz + \
 504                                  decode_putfh_maxsz + \
 505                                  decode_open_downgrade_maxsz + \
 506                                  decode_getattr_maxsz)
 507 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 508                                  encode_sequence_maxsz + \
 509                                  encode_putfh_maxsz + \
 510                                  encode_close_maxsz + \
 511                                  encode_getattr_maxsz)
 512 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 513                                  decode_sequence_maxsz + \
 514                                  decode_putfh_maxsz + \
 515                                  decode_close_maxsz + \
 516                                  decode_getattr_maxsz)
 517 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 518                                  encode_sequence_maxsz + \
 519                                  encode_putfh_maxsz + \
 520                                  encode_setattr_maxsz + \
 521                                  encode_getattr_maxsz)
 522 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 523                                  decode_sequence_maxsz + \
 524                                  decode_putfh_maxsz + \
 525                                  decode_setattr_maxsz + \
 526                                  decode_getattr_maxsz)
 527 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 528                                 encode_sequence_maxsz + \
 529                                 encode_putfh_maxsz + \
 530                                 encode_fsinfo_maxsz)
 531 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_fsinfo_maxsz)
 535 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 536                                 encode_renew_maxsz)
 537 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 538                                 decode_renew_maxsz)
 539 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 540                                 encode_setclientid_maxsz)
 541 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 542                                 decode_setclientid_maxsz)
 543 #define NFS4_enc_setclientid_confirm_sz \
 544                                 (compound_encode_hdr_maxsz + \
 545                                 encode_setclientid_confirm_maxsz)
 546 #define NFS4_dec_setclientid_confirm_sz \
 547                                 (compound_decode_hdr_maxsz + \
 548                                 decode_setclientid_confirm_maxsz)
 549 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 550                                 encode_sequence_maxsz + \
 551                                 encode_putfh_maxsz + \
 552                                 encode_lock_maxsz)
 553 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 554                                 decode_sequence_maxsz + \
 555                                 decode_putfh_maxsz + \
 556                                 decode_lock_maxsz)
 557 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_lockt_maxsz)
 561 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 562                                  decode_sequence_maxsz + \
 563                                  decode_putfh_maxsz + \
 564                                  decode_lockt_maxsz)
 565 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_locku_maxsz)
 569 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_locku_maxsz)
 573 #define NFS4_enc_release_lockowner_sz \
 574                                 (compound_encode_hdr_maxsz + \
 575                                  encode_lockowner_maxsz)
 576 #define NFS4_dec_release_lockowner_sz \
 577                                 (compound_decode_hdr_maxsz + \
 578                                  decode_lockowner_maxsz)
 579 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 580                                 encode_sequence_maxsz + \
 581                                 encode_putfh_maxsz + \
 582                                 encode_access_maxsz + \
 583                                 encode_getattr_maxsz)
 584 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 585                                 decode_sequence_maxsz + \
 586                                 decode_putfh_maxsz + \
 587                                 decode_access_maxsz + \
 588                                 decode_getattr_maxsz)
 589 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_renew_maxsz)
 594 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_getattr_maxsz + \
 598                                 decode_renew_maxsz)
 599 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_lookup_maxsz + \
 603                                 encode_getattr_maxsz + \
 604                                 encode_getfh_maxsz)
 605 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 606                                 decode_sequence_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_lookup_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_getfh_maxsz)
 611 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putrootfh_maxsz + \
 614                                 encode_getattr_maxsz + \
 615                                 encode_getfh_maxsz)
 616 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putrootfh_maxsz + \
 619                                 decode_getattr_maxsz + \
 620                                 decode_getfh_maxsz)
 621 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_remove_maxsz)
 625 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_remove_maxsz)
 629 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_savefh_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_rename_maxsz)
 635 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_savefh_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_rename_maxsz)
 641 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_savefh_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_link_maxsz + \
 647                                 encode_restorefh_maxsz + \
 648                                 encode_getattr_maxsz)
 649 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_savefh_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_link_maxsz + \
 655                                 decode_restorefh_maxsz + \
 656                                 decode_getattr_maxsz)
 657 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 658                                 encode_sequence_maxsz + \
 659                                 encode_putfh_maxsz + \
 660                                 encode_symlink_maxsz + \
 661                                 encode_getattr_maxsz + \
 662                                 encode_getfh_maxsz)
 663 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_symlink_maxsz + \
 667                                 decode_getattr_maxsz + \
 668                                 decode_getfh_maxsz)
 669 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_create_maxsz + \
 673                                 encode_getfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_create_maxsz + \
 679                                 decode_getfh_maxsz + \
 680                                 decode_getattr_maxsz)
 681 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_getattr_maxsz)
 685 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 686                                 decode_sequence_maxsz + \
 687                                 decode_putfh_maxsz + \
 688                                 decode_getattr_maxsz)
 689 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 690                                 encode_sequence_maxsz + \
 691                                 encode_putfh_maxsz + \
 692                                 encode_statfs_maxsz)
 693 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_statfs_maxsz)
 697 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_getattr_maxsz)
 705 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_delegreturn_maxsz + \
 709                                 encode_getattr_maxsz)
 710 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 711                                 decode_sequence_maxsz + \
 712                                 decode_delegreturn_maxsz + \
 713                                 decode_getattr_maxsz)
 714 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 715                                 encode_sequence_maxsz + \
 716                                 encode_putfh_maxsz + \
 717                                 encode_getacl_maxsz)
 718 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 719                                 decode_sequence_maxsz + \
 720                                 decode_putfh_maxsz + \
 721                                 decode_getacl_maxsz)
 722 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 723                                 encode_sequence_maxsz + \
 724                                 encode_putfh_maxsz + \
 725                                 encode_setacl_maxsz)
 726 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 727                                 decode_sequence_maxsz + \
 728                                 decode_putfh_maxsz + \
 729                                 decode_setacl_maxsz)
 730 #define NFS4_enc_fs_locations_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_sequence_maxsz + \
 733                                  encode_putfh_maxsz + \
 734                                  encode_lookup_maxsz + \
 735                                  encode_fs_locations_maxsz + \
 736                                  encode_renew_maxsz)
 737 #define NFS4_dec_fs_locations_sz \
 738                                 (compound_decode_hdr_maxsz + \
 739                                  decode_sequence_maxsz + \
 740                                  decode_putfh_maxsz + \
 741                                  decode_lookup_maxsz + \
 742                                  decode_fs_locations_maxsz + \
 743                                  decode_renew_maxsz)
 744 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 745                                 encode_sequence_maxsz + \
 746                                 encode_putfh_maxsz + \
 747                                 encode_secinfo_maxsz)
 748 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 749                                 decode_sequence_maxsz + \
 750                                 decode_putfh_maxsz + \
 751                                 decode_secinfo_maxsz)
 752 #define NFS4_enc_fsid_present_sz \
 753                                 (compound_encode_hdr_maxsz + \
 754                                  encode_sequence_maxsz + \
 755                                  encode_putfh_maxsz + \
 756                                  encode_getfh_maxsz + \
 757                                  encode_renew_maxsz)
 758 #define NFS4_dec_fsid_present_sz \
 759                                 (compound_decode_hdr_maxsz + \
 760                                  decode_sequence_maxsz + \
 761                                  decode_putfh_maxsz + \
 762                                  decode_getfh_maxsz + \
 763                                  decode_renew_maxsz)
 764 #if defined(CONFIG_NFS_V4_1)
 765 #define NFS4_enc_bind_conn_to_session_sz \
 766                                 (compound_encode_hdr_maxsz + \
 767                                  encode_bind_conn_to_session_maxsz)
 768 #define NFS4_dec_bind_conn_to_session_sz \
 769                                 (compound_decode_hdr_maxsz + \
 770                                  decode_bind_conn_to_session_maxsz)
 771 #define NFS4_enc_exchange_id_sz \
 772                                 (compound_encode_hdr_maxsz + \
 773                                  encode_exchange_id_maxsz)
 774 #define NFS4_dec_exchange_id_sz \
 775                                 (compound_decode_hdr_maxsz + \
 776                                  decode_exchange_id_maxsz)
 777 #define NFS4_enc_create_session_sz \
 778                                 (compound_encode_hdr_maxsz + \
 779                                  encode_create_session_maxsz)
 780 #define NFS4_dec_create_session_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_create_session_maxsz)
 783 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 784                                          encode_destroy_session_maxsz)
 785 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 786                                          decode_destroy_session_maxsz)
 787 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 788                                          encode_destroy_clientid_maxsz)
 789 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 790                                          decode_destroy_clientid_maxsz)
 791 #define NFS4_enc_sequence_sz \
 792                                 (compound_decode_hdr_maxsz + \
 793                                  encode_sequence_maxsz)
 794 #define NFS4_dec_sequence_sz \
 795                                 (compound_decode_hdr_maxsz + \
 796                                  decode_sequence_maxsz)
 797 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 798                                          encode_sequence_maxsz + \
 799                                          encode_putrootfh_maxsz + \
 800                                          encode_fsinfo_maxsz)
 801 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 802                                          decode_sequence_maxsz + \
 803                                          decode_putrootfh_maxsz + \
 804                                          decode_fsinfo_maxsz)
 805 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 806                                          encode_sequence_maxsz + \
 807                                          encode_reclaim_complete_maxsz)
 808 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 809                                          decode_sequence_maxsz + \
 810                                          decode_reclaim_complete_maxsz)
 811 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 812                                 encode_sequence_maxsz +\
 813                                 encode_getdeviceinfo_maxsz)
 814 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 815                                 decode_sequence_maxsz + \
 816                                 decode_getdeviceinfo_maxsz)
 817 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 818                                 encode_sequence_maxsz + \
 819                                 encode_putfh_maxsz +        \
 820                                 encode_layoutget_maxsz)
 821 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 822                                 decode_sequence_maxsz + \
 823                                 decode_putfh_maxsz +        \
 824                                 decode_layoutget_maxsz)
 825 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 826                                 encode_sequence_maxsz +\
 827                                 encode_putfh_maxsz + \
 828                                 encode_layoutcommit_maxsz + \
 829                                 encode_getattr_maxsz)
 830 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 831                                 decode_sequence_maxsz + \
 832                                 decode_putfh_maxsz + \
 833                                 decode_layoutcommit_maxsz + \
 834                                 decode_getattr_maxsz)
 835 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 836                                 encode_sequence_maxsz + \
 837                                 encode_putfh_maxsz + \
 838                                 encode_layoutreturn_maxsz)
 839 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 840                                 decode_sequence_maxsz + \
 841                                 decode_putfh_maxsz + \
 842                                 decode_layoutreturn_maxsz)
 843 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 844                                         encode_sequence_maxsz + \
 845                                         encode_putrootfh_maxsz +\
 846                                         encode_secinfo_no_name_maxsz)
 847 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 848                                         decode_sequence_maxsz + \
 849                                         decode_putrootfh_maxsz + \
 850                                         decode_secinfo_no_name_maxsz)
 851 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 852                                          encode_sequence_maxsz + \
 853                                          encode_test_stateid_maxsz)
 854 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 855                                          decode_sequence_maxsz + \
 856                                          decode_test_stateid_maxsz)
 857 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 858                                          encode_sequence_maxsz + \
 859                                          encode_free_stateid_maxsz)
 860 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 861                                          decode_sequence_maxsz + \
 862                                          decode_free_stateid_maxsz)
 863
 864 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 865                                       compound_encode_hdr_maxsz +
 866                                       encode_sequence_maxsz +
 867                                       encode_putfh_maxsz +
 868                                       encode_getattr_maxsz) *
 869                                      XDR_UNIT);
 870
 871 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 872                                      compound_decode_hdr_maxsz +
 873                                      decode_sequence_maxsz +
 874                                      decode_putfh_maxsz) *
 875                                     XDR_UNIT);
 876
 877 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 878                                            compound_decode_hdr_maxsz +
 879                                            decode_sequence_maxsz) *
 880                                           XDR_UNIT);
 881 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 882 #endif /* CONFIG_NFS_V4_1 */
 883
 884 static const umode_t nfs_type2fmt[] = {
 885         [NF4BAD] = 0,
 886         [NF4REG] = S_IFREG,
 887         [NF4DIR] = S_IFDIR,
 888         [NF4BLK] = S_IFBLK,
 889         [NF4CHR] = S_IFCHR,
 890         [NF4LNK] = S_IFLNK,
 891         [NF4SOCK] = S_IFSOCK,
 892         [NF4FIFO] = S_IFIFO,
 893         [NF4ATTRDIR] = 0,
 894         [NF4NAMEDATTR] = 0,
 895 };
 896
 897 struct compound_hdr {
 898         int32_t         status;
 899         uint32_t        nops;
 900         __be32 *        nops_p;
 901         uint32_t        taglen;
 902         char *          tag;
 903         uint32_t        replen;         /* expected reply words */
 904         u32             minorversion;
 905 };
 906
 907 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 908 {
 909         __be32 *p = xdr_reserve_space(xdr, nbytes);
 910         BUG_ON(!p);
 911         return p;
 912 }
 913
 914 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 915 {
 916         __be32 *p;
 917
 918         p = xdr_reserve_space(xdr, len);
 919         xdr_encode_opaque_fixed(p, buf, len);
 920 }
 921
 922 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 923 {
 924         __be32 *p;
 925
 926         p = reserve_space(xdr, 4 + len);
 927         xdr_encode_opaque(p, str, len);
 928 }
 929
 930 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 931 {
 932         __be32 *p;
 933
 934         p = reserve_space(xdr, 4);
 935         *p = cpu_to_be32(n);
 936 }
 937
 938 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 939 {
 940         __be32 *p;
 941
 942         p = reserve_space(xdr, 8);
 943         xdr_encode_hyper(p, n);
 944 }
 945
 946 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 947                 const struct nfs_seqid *seqid)
 948 {
 949         encode_uint32(xdr, seqid->sequence->counter);
 950 }
 951
 952 static void encode_compound_hdr(struct xdr_stream *xdr,
 953                                 struct rpc_rqst *req,
 954                                 struct compound_hdr *hdr)
 955 {
 956         __be32 *p;
 957         struct rpc_auth *auth = req->rq_cred->cr_auth;
 958
 959         /* initialize running count of expected bytes in reply.
 960          * NOTE: the replied tag SHOULD be the same is the one sent,
 961          * but this is not required as a MUST for the server to do so. */
 962         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 963
 964         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 965         encode_string(xdr, hdr->taglen, hdr->tag);
 966         p = reserve_space(xdr, 8);
 967         *p++ = cpu_to_be32(hdr->minorversion);
 968         hdr->nops_p = p;
 969         *p = cpu_to_be32(hdr->nops);
 970 }
 971
 972 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 973                 uint32_t replen,
 974                 struct compound_hdr *hdr)
 975 {
 976         encode_uint32(xdr, op);
 977         hdr->nops++;
 978         hdr->replen += replen;
 979 }
 980
 981 static void encode_nops(struct compound_hdr *hdr)
 982 {
 983         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 984         *hdr->nops_p = htonl(hdr->nops);
 985 }
 986
 987 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 988 {
 989         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 990 }
 991
 992 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 993 {
 994         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 995 }
 996
 997 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 998                                 const struct nfs4_label *label,
 999                                 const struct nfs_server *server)
1000 {
1001         char owner_name[IDMAP_NAMESZ];
1002         char owner_group[IDMAP_NAMESZ];
1003         int owner_namelen = 0;
1004         int owner_grouplen = 0;
1005         __be32 *p;
1006         unsigned i;
1007         uint32_t len = 0;
1008         uint32_t bmval_len;
1009         uint32_t bmval[3] = { 0 };
1010
1011         /*
1012          * We reserve enough space to write the entire attribute buffer at once.
1013          * In the worst-case, this would be
1014          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1015          * = 40 bytes, plus any contribution from variable-length fields
1016          *            such as owner/group.
1017          */
1018         if (iap->ia_valid & ATTR_SIZE) {
1019                 bmval[0] |= FATTR4_WORD0_SIZE;
1020                 len += 8;
1021         }
1022         if (iap->ia_valid & ATTR_MODE) {
1023                 bmval[1] |= FATTR4_WORD1_MODE;
1024                 len += 4;
1025         }
1026         if (iap->ia_valid & ATTR_UID) {
1027                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1028                 if (owner_namelen < 0) {
1029                         dprintk("nfs: couldn't resolve uid %d to string\n",
1030                                         from_kuid(&init_user_ns, iap->ia_uid));
1031                         /* XXX */
1032                         strcpy(owner_name, "nobody");
1033                         owner_namelen = sizeof("nobody") - 1;
1034                         /* goto out; */
1035                 }
1036                 bmval[1] |= FATTR4_WORD1_OWNER;
1037                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1038         }
1039         if (iap->ia_valid & ATTR_GID) {
1040                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1041                 if (owner_grouplen < 0) {
1042                         dprintk("nfs: couldn't resolve gid %d to string\n",
1043                                         from_kgid(&init_user_ns, iap->ia_gid));
1044                         strcpy(owner_group, "nobody");
1045                         owner_grouplen = sizeof("nobody") - 1;
1046                         /* goto out; */
1047                 }
1048                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1049                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1050         }
1051         if (iap->ia_valid & ATTR_ATIME_SET) {
1052                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1053                 len += 16;
1054         } else if (iap->ia_valid & ATTR_ATIME) {
1055                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 len += 4;
1057         }
1058         if (iap->ia_valid & ATTR_MTIME_SET) {
1059                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1060                 len += 16;
1061         } else if (iap->ia_valid & ATTR_MTIME) {
1062                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1063                 len += 4;
1064         }
1065         if (label) {
1066                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1067                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1068         }
1069
1070         if (bmval[2] != 0)
1071                 bmval_len = 3;
1072         else if (bmval[1] != 0)
1073                 bmval_len = 2;
1074         else
1075                 bmval_len = 1;
1076
1077         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1078
1079         *p++ = cpu_to_be32(bmval_len);
1080         for (i = 0; i < bmval_len; i++)
1081                 *p++ = cpu_to_be32(bmval[i]);
1082         *p++ = cpu_to_be32(len);
1083
1084         if (bmval[0] & FATTR4_WORD0_SIZE)
1085                 p = xdr_encode_hyper(p, iap->ia_size);
1086         if (bmval[1] & FATTR4_WORD1_MODE)
1087                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1088         if (bmval[1] & FATTR4_WORD1_OWNER)
1089                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1090         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1091                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1092         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1093                 if (iap->ia_valid & ATTR_ATIME_SET) {
1094                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1095                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1096                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1097                 } else
1098                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1099         }
1100         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1101                 if (iap->ia_valid & ATTR_MTIME_SET) {
1102                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1103                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1104                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1105                 } else
1106                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1107         }
1108         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1109                 *p++ = cpu_to_be32(label->lfs);
1110                 *p++ = cpu_to_be32(label->pi);
1111                 *p++ = cpu_to_be32(label->len);
1112                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1113         }
1114
1115 /* out: */
1116 }
1117
1118 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1119 {
1120         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1121         encode_uint32(xdr, access);
1122 }
1123
1124 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1125 {
1126         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1127         encode_nfs4_seqid(xdr, arg->seqid);
1128         encode_nfs4_stateid(xdr, arg->stateid);
1129 }
1130
1131 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1132 {
1133         __be32 *p;
1134
1135         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1136         p = reserve_space(xdr, 12);
1137         p = xdr_encode_hyper(p, args->offset);
1138         *p = cpu_to_be32(args->count);
1139 }
1140
1141 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1142 {
1143         __be32 *p;
1144
1145         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1146         encode_uint32(xdr, create->ftype);
1147
1148         switch (create->ftype) {
1149         case NF4LNK:
1150                 p = reserve_space(xdr, 4);
1151                 *p = cpu_to_be32(create->u.symlink.len);
1152                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1153                 break;
1154
1155         case NF4BLK: case NF4CHR:
1156                 p = reserve_space(xdr, 8);
1157                 *p++ = cpu_to_be32(create->u.device.specdata1);
1158                 *p = cpu_to_be32(create->u.device.specdata2);
1159                 break;
1160
1161         default:
1162                 break;
1163         }
1164
1165         encode_string(xdr, create->name->len, create->name->name);
1166         encode_attrs(xdr, create->attrs, create->label, create->server);
1167 }
1168
1169 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1170 {
1171         __be32 *p;
1172
1173         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1174         p = reserve_space(xdr, 8);
1175         *p++ = cpu_to_be32(1);
1176         *p = cpu_to_be32(bitmap);
1177 }
1178
1179 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1180 {
1181         __be32 *p;
1182
1183         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1184         p = reserve_space(xdr, 12);
1185         *p++ = cpu_to_be32(2);
1186         *p++ = cpu_to_be32(bm0);
1187         *p = cpu_to_be32(bm1);
1188 }
1189
1190 static void
1191 encode_getattr_three(struct xdr_stream *xdr,
1192                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1193                      struct compound_hdr *hdr)
1194 {
1195         __be32 *p;
1196
1197         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1198         if (bm2) {
1199                 p = reserve_space(xdr, 16);
1200                 *p++ = cpu_to_be32(3);
1201                 *p++ = cpu_to_be32(bm0);
1202                 *p++ = cpu_to_be32(bm1);
1203                 *p = cpu_to_be32(bm2);
1204         } else if (bm1) {
1205                 p = reserve_space(xdr, 12);
1206                 *p++ = cpu_to_be32(2);
1207                 *p++ = cpu_to_be32(bm0);
1208                 *p = cpu_to_be32(bm1);
1209         } else {
1210                 p = reserve_space(xdr, 8);
1211                 *p++ = cpu_to_be32(1);
1212                 *p = cpu_to_be32(bm0);
1213         }
1214 }
1215
1216 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1217 {
1218         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1219                            bitmask[1] & nfs4_fattr_bitmap[1],
1220                            bitmask[2] & nfs4_fattr_bitmap[2],
1221                            hdr);
1222 }
1223
1224 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1225                                  const u32 *open_bitmap,
1226                                  struct compound_hdr *hdr)
1227 {
1228         encode_getattr_three(xdr,
1229                              bitmask[0] & open_bitmap[0],
1230                              bitmask[1] & open_bitmap[1],
1231                              bitmask[2] & open_bitmap[2],
1232                              hdr);
1233 }
1234
1235 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1236 {
1237         encode_getattr_three(xdr,
1238                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1239                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1240                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1241                              hdr);
1242 }
1243
1244 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1245 {
1246         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1247                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1248 }
1249
1250 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1251 {
1252         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1253 }
1254
1255 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1256 {
1257         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1258         encode_string(xdr, name->len, name->name);
1259 }
1260
1261 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1262 {
1263         if (fl->fl_type == F_RDLCK)
1264                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1265         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1266 }
1267
1268 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1269 {
1270         if (fl->fl_end == OFFSET_MAX)
1271                 return ~(uint64_t)0;
1272         return fl->fl_end - fl->fl_start + 1;
1273 }
1274
1275 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1276 {
1277         __be32 *p;
1278
1279         p = reserve_space(xdr, 32);
1280         p = xdr_encode_hyper(p, lowner->clientid);
1281         *p++ = cpu_to_be32(20);
1282         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1283         *p++ = cpu_to_be32(lowner->s_dev);
1284         xdr_encode_hyper(p, lowner->id);
1285 }
1286
1287 /*
1288  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1289  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1290  */
1291 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1292 {
1293         __be32 *p;
1294
1295         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1296         p = reserve_space(xdr, 28);
1297         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1298         *p++ = cpu_to_be32(args->reclaim);
1299         p = xdr_encode_hyper(p, args->fl->fl_start);
1300         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1301         *p = cpu_to_be32(args->new_lock_owner);
1302         if (args->new_lock_owner){
1303                 encode_nfs4_seqid(xdr, args->open_seqid);
1304                 encode_nfs4_stateid(xdr, args->open_stateid);
1305                 encode_nfs4_seqid(xdr, args->lock_seqid);
1306                 encode_lockowner(xdr, &args->lock_owner);
1307         }
1308         else {
1309                 encode_nfs4_stateid(xdr, args->lock_stateid);
1310                 encode_nfs4_seqid(xdr, args->lock_seqid);
1311         }
1312 }
1313
1314 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1315 {
1316         __be32 *p;
1317
1318         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1319         p = reserve_space(xdr, 20);
1320         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1321         p = xdr_encode_hyper(p, args->fl->fl_start);
1322         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1323         encode_lockowner(xdr, &args->lock_owner);
1324 }
1325
1326 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1327 {
1328         __be32 *p;
1329
1330         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1331         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1332         encode_nfs4_seqid(xdr, args->seqid);
1333         encode_nfs4_stateid(xdr, args->stateid);
1334         p = reserve_space(xdr, 16);
1335         p = xdr_encode_hyper(p, args->fl->fl_start);
1336         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 }
1338
1339 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1340 {
1341         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1342         encode_lockowner(xdr, lowner);
1343 }
1344
1345 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1346 {
1347         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1348         encode_string(xdr, name->len, name->name);
1349 }
1350
1351 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1352 {
1353         __be32 *p;
1354
1355         p = reserve_space(xdr, 8);
1356         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1357         case FMODE_READ:
1358                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1359                 break;
1360         case FMODE_WRITE:
1361                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1362                 break;
1363         case FMODE_READ|FMODE_WRITE:
1364                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1365                 break;
1366         default:
1367                 *p++ = cpu_to_be32(0);
1368         }
1369         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1370 }
1371
1372 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1373 {
1374         __be32 *p;
1375  /*
1376  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1377  * owner 4 = 32
1378  */
1379         encode_nfs4_seqid(xdr, arg->seqid);
1380         encode_share_access(xdr, arg->fmode);
1381         p = reserve_space(xdr, 36);
1382         p = xdr_encode_hyper(p, arg->clientid);
1383         *p++ = cpu_to_be32(24);
1384         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1385         *p++ = cpu_to_be32(arg->server->s_dev);
1386         *p++ = cpu_to_be32(arg->id.uniquifier);
1387         xdr_encode_hyper(p, arg->id.create_time);
1388 }
1389
1390 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1391 {
1392         struct iattr dummy;
1393         __be32 *p;
1394
1395         p = reserve_space(xdr, 4);
1396         switch(arg->createmode) {
1397         case NFS4_CREATE_UNCHECKED:
1398                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1399                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1400                 break;
1401         case NFS4_CREATE_GUARDED:
1402                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1403                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1404                 break;
1405         case NFS4_CREATE_EXCLUSIVE:
1406                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1407                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1408                 break;
1409         case NFS4_CREATE_EXCLUSIVE4_1:
1410                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1411                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1412                 dummy.ia_valid = 0;
1413                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1414         }
1415 }
1416
1417 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419         __be32 *p;
1420
1421         p = reserve_space(xdr, 4);
1422         switch (arg->open_flags & O_CREAT) {
1423         case 0:
1424                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1425                 break;
1426         default:
1427                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1428                 encode_createmode(xdr, arg);
1429         }
1430 }
1431
1432 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1433 {
1434         __be32 *p;
1435
1436         p = reserve_space(xdr, 4);
1437         switch (delegation_type) {
1438         case 0:
1439                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1440                 break;
1441         case FMODE_READ:
1442                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1443                 break;
1444         case FMODE_WRITE|FMODE_READ:
1445                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1446                 break;
1447         default:
1448                 BUG();
1449         }
1450 }
1451
1452 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1458         encode_string(xdr, name->len, name->name);
1459 }
1460
1461 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1462 {
1463         __be32 *p;
1464
1465         p = reserve_space(xdr, 4);
1466         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1467         encode_delegation_type(xdr, type);
1468 }
1469
1470 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1476         encode_nfs4_stateid(xdr, stateid);
1477         encode_string(xdr, name->len, name->name);
1478 }
1479
1480 static inline void encode_claim_fh(struct xdr_stream *xdr)
1481 {
1482         __be32 *p;
1483
1484         p = reserve_space(xdr, 4);
1485         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1486 }
1487
1488 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1489 {
1490         __be32 *p;
1491
1492         p = reserve_space(xdr, 4);
1493         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1494         encode_nfs4_stateid(xdr, stateid);
1495 }
1496
1497 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1498 {
1499         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1500         encode_openhdr(xdr, arg);
1501         encode_opentype(xdr, arg);
1502         switch (arg->claim) {
1503         case NFS4_OPEN_CLAIM_NULL:
1504                 encode_claim_null(xdr, arg->name);
1505                 break;
1506         case NFS4_OPEN_CLAIM_PREVIOUS:
1507                 encode_claim_previous(xdr, arg->u.delegation_type);
1508                 break;
1509         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1510                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1511                 break;
1512         case NFS4_OPEN_CLAIM_FH:
1513                 encode_claim_fh(xdr);
1514                 break;
1515         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1516                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1517                 break;
1518         default:
1519                 BUG();
1520         }
1521 }
1522
1523 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1524 {
1525         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1526         encode_nfs4_stateid(xdr, arg->stateid);
1527         encode_nfs4_seqid(xdr, arg->seqid);
1528 }
1529
1530 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1531 {
1532         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1533         encode_nfs4_stateid(xdr, arg->stateid);
1534         encode_nfs4_seqid(xdr, arg->seqid);
1535         encode_share_access(xdr, arg->fmode);
1536 }
1537
1538 static void
1539 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1540 {
1541         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1542         encode_string(xdr, fh->size, fh->data);
1543 }
1544
1545 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1546 {
1547         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1548 }
1549
1550 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1551                         struct compound_hdr *hdr)
1552 {
1553         __be32 *p;
1554
1555         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1556         encode_nfs4_stateid(xdr, &args->stateid);
1557
1558         p = reserve_space(xdr, 12);
1559         p = xdr_encode_hyper(p, args->offset);
1560         *p = cpu_to_be32(args->count);
1561 }
1562
1563 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1564 {
1565         uint32_t attrs[3] = {
1566                 FATTR4_WORD0_RDATTR_ERROR,
1567                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1568         };
1569         uint32_t dircount = readdir->count >> 1;
1570         __be32 *p, verf[2];
1571         uint32_t attrlen = 0;
1572         unsigned int i;
1573
1574         if (readdir->plus) {
1575                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1576                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1577                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1578                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1579                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1580                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1581                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1582                 dircount >>= 1;
1583         }
1584         /* Use mounted_on_fileid only if the server supports it */
1585         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1586                 attrs[0] |= FATTR4_WORD0_FILEID;
1587         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1588                 attrs[i] &= readdir->bitmask[i];
1589                 if (attrs[i] != 0)
1590                         attrlen = i+1;
1591         }
1592
1593         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1594         encode_uint64(xdr, readdir->cookie);
1595         encode_nfs4_verifier(xdr, &readdir->verifier);
1596         p = reserve_space(xdr, 12 + (attrlen << 2));
1597         *p++ = cpu_to_be32(dircount);
1598         *p++ = cpu_to_be32(readdir->count);
1599         *p++ = cpu_to_be32(attrlen);
1600         for (i = 0; i < attrlen; i++)
1601                 *p++ = cpu_to_be32(attrs[i]);
1602         memcpy(verf, readdir->verifier.data, sizeof(verf));
1603
1604         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1605                         __func__,
1606                         (unsigned long long)readdir->cookie,
1607                         verf[0], verf[1],
1608                         attrs[0] & readdir->bitmask[0],
1609                         attrs[1] & readdir->bitmask[1],
1610                         attrs[2] & readdir->bitmask[2]);
1611 }
1612
1613 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1614 {
1615         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1616 }
1617
1618 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1619 {
1620         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1621         encode_string(xdr, name->len, name->name);
1622 }
1623
1624 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1625 {
1626         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1627         encode_string(xdr, oldname->len, oldname->name);
1628         encode_string(xdr, newname->len, newname->name);
1629 }
1630
1631 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1632                          struct compound_hdr *hdr)
1633 {
1634         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1635         encode_uint64(xdr, clid);
1636 }
1637
1638 static void
1639 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1640 {
1641         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1642 }
1643
1644 static void
1645 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1646 {
1647         __be32 *p;
1648
1649         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1650         encode_nfs4_stateid(xdr, &zero_stateid);
1651         p = reserve_space(xdr, 2*4);
1652         *p++ = cpu_to_be32(1);
1653         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1654         p = reserve_space(xdr, 4);
1655         *p = cpu_to_be32(arg->acl_len);
1656         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1657 }
1658
1659 static void
1660 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1663 }
1664
1665 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1666 {
1667         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1668         encode_nfs4_stateid(xdr, &arg->stateid);
1669         encode_attrs(xdr, arg->iap, arg->label, server);
1670 }
1671
1672 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1673 {
1674         __be32 *p;
1675
1676         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1677         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1678
1679         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1680         p = reserve_space(xdr, 4);
1681         *p = cpu_to_be32(setclientid->sc_prog);
1682         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1683         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1684         p = reserve_space(xdr, 4);
1685         *p = cpu_to_be32(setclientid->sc_cb_ident);
1686 }
1687
1688 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1689 {
1690         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1691                         decode_setclientid_confirm_maxsz, hdr);
1692         encode_uint64(xdr, arg->clientid);
1693         encode_nfs4_verifier(xdr, &arg->confirm);
1694 }
1695
1696 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1697                          struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700
1701         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1702         encode_nfs4_stateid(xdr, &args->stateid);
1703
1704         p = reserve_space(xdr, 16);
1705         p = xdr_encode_hyper(p, args->offset);
1706         *p++ = cpu_to_be32(args->stable);
1707         *p = cpu_to_be32(args->count);
1708
1709         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1710 }
1711
1712 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1713 {
1714         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1715         encode_nfs4_stateid(xdr, stateid);
1716 }
1717
1718 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1719 {
1720         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1721         encode_string(xdr, name->len, name->name);
1722 }
1723
1724 #if defined(CONFIG_NFS_V4_1)
1725 /* NFSv4.1 operations */
1726 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1727                                    struct nfs4_session *session,
1728                                    struct compound_hdr *hdr)
1729 {
1730         __be32 *p;
1731
1732         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1733                 decode_bind_conn_to_session_maxsz, hdr);
1734         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1735         p = xdr_reserve_space(xdr, 8);
1736         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1737         *p = 0; /* use_conn_in_rdma_mode = False */
1738 }
1739
1740 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1741 {
1742         unsigned int i;
1743         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1744         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1745                 encode_uint32(xdr, op_map->u.words[i]);
1746 }
1747
1748 static void encode_exchange_id(struct xdr_stream *xdr,
1749                                struct nfs41_exchange_id_args *args,
1750                                struct compound_hdr *hdr)
1751 {
1752         __be32 *p;
1753         char impl_name[IMPL_NAME_LIMIT];
1754         int len = 0;
1755
1756         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1757         encode_nfs4_verifier(xdr, args->verifier);
1758
1759         encode_string(xdr, args->id_len, args->id);
1760
1761         encode_uint32(xdr, args->flags);
1762         encode_uint32(xdr, args->state_protect.how);
1763
1764         switch (args->state_protect.how) {
1765         case SP4_NONE:
1766                 break;
1767         case SP4_MACH_CRED:
1768                 encode_op_map(xdr, &args->state_protect.enforce);
1769                 encode_op_map(xdr, &args->state_protect.allow);
1770                 break;
1771         default:
1772                 WARN_ON_ONCE(1);
1773                 break;
1774         }
1775
1776         if (send_implementation_id &&
1777             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1778             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1779                 <= sizeof(impl_name) + 1)
1780                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1781                                utsname()->sysname, utsname()->release,
1782                                utsname()->version, utsname()->machine);
1783
1784         if (len > 0) {
1785                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1786
1787                 encode_string(xdr,
1788                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1789                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1790                 encode_string(xdr, len, impl_name);
1791                 /* just send zeros for nii_date - the date is in nii_name */
1792                 p = reserve_space(xdr, 12);
1793                 p = xdr_encode_hyper(p, 0);
1794                 *p = cpu_to_be32(0);
1795         } else
1796                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1797 }
1798
1799 static void encode_create_session(struct xdr_stream *xdr,
1800                                   struct nfs41_create_session_args *args,
1801                                   struct compound_hdr *hdr)
1802 {
1803         __be32 *p;
1804         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1805         uint32_t len;
1806         struct nfs_client *clp = args->client;
1807         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1808         u32 max_resp_sz_cached;
1809
1810         /*
1811          * Assumes OPEN is the biggest non-idempotent compound.
1812          * 2 is the verifier.
1813          */
1814         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1815                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1816
1817         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1818                         clp->cl_ipaddr);
1819
1820         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1821         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1822         p = xdr_encode_hyper(p, clp->cl_clientid);
1823         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1824         *p++ = cpu_to_be32(args->flags);                        /*flags */
1825
1826         /* Fore Channel */
1827         *p++ = cpu_to_be32(0);                          /* header padding size */
1828         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1829         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1830         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1831         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1832         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1833         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1834
1835         /* Back Channel */
1836         *p++ = cpu_to_be32(0);                          /* header padding size */
1837         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1838         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1839         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1840         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1841         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1842         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1843
1844         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1845         *p++ = cpu_to_be32(1);
1846         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1847
1848         /* authsys_parms rfc1831 */
1849         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1850         p = xdr_encode_opaque(p, machine_name, len);
1851         *p++ = cpu_to_be32(0);                          /* UID */
1852         *p++ = cpu_to_be32(0);                          /* GID */
1853         *p = cpu_to_be32(0);                            /* No more gids */
1854 }
1855
1856 static void encode_destroy_session(struct xdr_stream *xdr,
1857                                    struct nfs4_session *session,
1858                                    struct compound_hdr *hdr)
1859 {
1860         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1861         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1862 }
1863
1864 static void encode_destroy_clientid(struct xdr_stream *xdr,
1865                                    uint64_t clientid,
1866                                    struct compound_hdr *hdr)
1867 {
1868         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1869         encode_uint64(xdr, clientid);
1870 }
1871
1872 static void encode_reclaim_complete(struct xdr_stream *xdr,
1873                                     struct nfs41_reclaim_complete_args *args,
1874                                     struct compound_hdr *hdr)
1875 {
1876         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1877         encode_uint32(xdr, args->one_fs);
1878 }
1879 #endif /* CONFIG_NFS_V4_1 */
1880
1881 static void encode_sequence(struct xdr_stream *xdr,
1882                             const struct nfs4_sequence_args *args,
1883                             struct compound_hdr *hdr)
1884 {
1885 #if defined(CONFIG_NFS_V4_1)
1886         struct nfs4_session *session;
1887         struct nfs4_slot_table *tp;
1888         struct nfs4_slot *slot = args->sa_slot;
1889         __be32 *p;
1890
1891         tp = slot->table;
1892         session = tp->session;
1893         if (!session)
1894                 return;
1895
1896         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1897
1898         /*
1899          * Sessionid + seqid + slotid + max slotid + cache_this
1900          */
1901         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1902                 "max_slotid=%d cache_this=%d\n",
1903                 __func__,
1904                 ((u32 *)session->sess_id.data)[0],
1905                 ((u32 *)session->sess_id.data)[1],
1906                 ((u32 *)session->sess_id.data)[2],
1907                 ((u32 *)session->sess_id.data)[3],
1908                 slot->seq_nr, slot->slot_nr,
1909                 tp->highest_used_slotid, args->sa_cache_this);
1910         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1911         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1912         *p++ = cpu_to_be32(slot->seq_nr);
1913         *p++ = cpu_to_be32(slot->slot_nr);
1914         *p++ = cpu_to_be32(tp->highest_used_slotid);
1915         *p = cpu_to_be32(args->sa_cache_this);
1916 #endif /* CONFIG_NFS_V4_1 */
1917 }
1918
1919 #ifdef CONFIG_NFS_V4_1
1920 static void
1921 encode_getdeviceinfo(struct xdr_stream *xdr,
1922                      const struct nfs4_getdeviceinfo_args *args,
1923                      struct compound_hdr *hdr)
1924 {
1925         __be32 *p;
1926
1927         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1928         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1929         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1930                                     NFS4_DEVICEID4_SIZE);
1931         *p++ = cpu_to_be32(args->pdev->layout_type);
1932         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1933
1934         p = reserve_space(xdr, 4 + 4);
1935         *p++ = cpu_to_be32(1);                  /* bitmap length */
1936         *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1937 }
1938
1939 static void
1940 encode_layoutget(struct xdr_stream *xdr,
1941                       const struct nfs4_layoutget_args *args,
1942                       struct compound_hdr *hdr)
1943 {
1944         __be32 *p;
1945
1946         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1947         p = reserve_space(xdr, 36);
1948         *p++ = cpu_to_be32(0);     /* Signal layout available */
1949         *p++ = cpu_to_be32(args->type);
1950         *p++ = cpu_to_be32(args->range.iomode);
1951         p = xdr_encode_hyper(p, args->range.offset);
1952         p = xdr_encode_hyper(p, args->range.length);
1953         p = xdr_encode_hyper(p, args->minlength);
1954         encode_nfs4_stateid(xdr, &args->stateid);
1955         encode_uint32(xdr, args->maxcount);
1956
1957         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1958                 __func__,
1959                 args->type,
1960                 args->range.iomode,
1961                 (unsigned long)args->range.offset,
1962                 (unsigned long)args->range.length,
1963                 args->maxcount);
1964 }
1965
1966 static int
1967 encode_layoutcommit(struct xdr_stream *xdr,
1968                     struct inode *inode,
1969                     struct nfs4_layoutcommit_args *args,
1970                     struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1975                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1976
1977         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1978         p = reserve_space(xdr, 20);
1979         /* Only whole file layouts */
1980         p = xdr_encode_hyper(p, 0); /* offset */
1981         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1982         *p = cpu_to_be32(0); /* reclaim */
1983         encode_nfs4_stateid(xdr, &args->stateid);
1984         p = reserve_space(xdr, 20);
1985         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1986         p = xdr_encode_hyper(p, args->lastbytewritten);
1987         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1988         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1989
1990         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1991                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1992                         NFS_I(inode)->layout, xdr, args);
1993         } else {
1994                 encode_uint32(xdr, args->layoutupdate_len);
1995                 if (args->layoutupdate_pages) {
1996                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1997                                         args->layoutupdate_len);
1998                 }
1999         }
2000
2001         return 0;
2002 }
2003
2004 static void
2005 encode_layoutreturn(struct xdr_stream *xdr,
2006                     const struct nfs4_layoutreturn_args *args,
2007                     struct compound_hdr *hdr)
2008 {
2009         __be32 *p;
2010
2011         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2012         p = reserve_space(xdr, 16);
2013         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2014         *p++ = cpu_to_be32(args->layout_type);
2015         *p++ = cpu_to_be32(IOMODE_ANY);
2016         *p = cpu_to_be32(RETURN_FILE);
2017         p = reserve_space(xdr, 16);
2018         p = xdr_encode_hyper(p, 0);
2019         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2020         spin_lock(&args->inode->i_lock);
2021         encode_nfs4_stateid(xdr, &args->stateid);
2022         spin_unlock(&args->inode->i_lock);
2023         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2024                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2025                         NFS_I(args->inode)->layout, xdr, args);
2026         } else
2027                 encode_uint32(xdr, 0);
2028 }
2029
2030 static int
2031 encode_secinfo_no_name(struct xdr_stream *xdr,
2032                        const struct nfs41_secinfo_no_name_args *args,
2033                        struct compound_hdr *hdr)
2034 {
2035         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2036         encode_uint32(xdr, args->style);
2037         return 0;
2038 }
2039
2040 static void encode_test_stateid(struct xdr_stream *xdr,
2041                                 struct nfs41_test_stateid_args *args,
2042                                 struct compound_hdr *hdr)
2043 {
2044         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2045         encode_uint32(xdr, 1);
2046         encode_nfs4_stateid(xdr, args->stateid);
2047 }
2048
2049 static void encode_free_stateid(struct xdr_stream *xdr,
2050                                 struct nfs41_free_stateid_args *args,
2051                                 struct compound_hdr *hdr)
2052 {
2053         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2054         encode_nfs4_stateid(xdr, &args->stateid);
2055 }
2056 #endif /* CONFIG_NFS_V4_1 */
2057
2058 /*
2059  * END OF "GENERIC" ENCODE ROUTINES.
2060  */
2061
2062 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2063 {
2064 #if defined(CONFIG_NFS_V4_1)
2065         struct nfs4_session *session = args->sa_slot->table->session;
2066         if (session)
2067                 return session->clp->cl_mvops->minor_version;
2068 #endif /* CONFIG_NFS_V4_1 */
2069         return 0;
2070 }
2071
2072 /*
2073  * Encode an ACCESS request
2074  */
2075 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2076                                 const struct nfs4_accessargs *args)
2077 {
2078         struct compound_hdr hdr = {
2079                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080         };
2081
2082         encode_compound_hdr(xdr, req, &hdr);
2083         encode_sequence(xdr, &args->seq_args, &hdr);
2084         encode_putfh(xdr, args->fh, &hdr);
2085         encode_access(xdr, args->access, &hdr);
2086         encode_getfattr(xdr, args->bitmask, &hdr);
2087         encode_nops(&hdr);
2088 }
2089
2090 /*
2091  * Encode LOOKUP request
2092  */
2093 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2094                                 const struct nfs4_lookup_arg *args)
2095 {
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->dir_fh, &hdr);
2103         encode_lookup(xdr, args->name, &hdr);
2104         encode_getfh(xdr, &hdr);
2105         encode_getfattr(xdr, args->bitmask, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode LOOKUP_ROOT request
2111  */
2112 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2113                                      struct xdr_stream *xdr,
2114                                      const struct nfs4_lookup_root_arg *args)
2115 {
2116         struct compound_hdr hdr = {
2117                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118         };
2119
2120         encode_compound_hdr(xdr, req, &hdr);
2121         encode_sequence(xdr, &args->seq_args, &hdr);
2122         encode_putrootfh(xdr, &hdr);
2123         encode_getfh(xdr, &hdr);
2124         encode_getfattr(xdr, args->bitmask, &hdr);
2125         encode_nops(&hdr);
2126 }
2127
2128 /*
2129  * Encode REMOVE request
2130  */
2131 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2132                                 const struct nfs_removeargs *args)
2133 {
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         encode_compound_hdr(xdr, req, &hdr);
2139         encode_sequence(xdr, &args->seq_args, &hdr);
2140         encode_putfh(xdr, args->fh, &hdr);
2141         encode_remove(xdr, &args->name, &hdr);
2142         encode_nops(&hdr);
2143 }
2144
2145 /*
2146  * Encode RENAME request
2147  */
2148 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2149                                 const struct nfs_renameargs *args)
2150 {
2151         struct compound_hdr hdr = {
2152                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153         };
2154
2155         encode_compound_hdr(xdr, req, &hdr);
2156         encode_sequence(xdr, &args->seq_args, &hdr);
2157         encode_putfh(xdr, args->old_dir, &hdr);
2158         encode_savefh(xdr, &hdr);
2159         encode_putfh(xdr, args->new_dir, &hdr);
2160         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2161         encode_nops(&hdr);
2162 }
2163
2164 /*
2165  * Encode LINK request
2166  */
2167 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2168                              const struct nfs4_link_arg *args)
2169 {
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         encode_compound_hdr(xdr, req, &hdr);
2175         encode_sequence(xdr, &args->seq_args, &hdr);
2176         encode_putfh(xdr, args->fh, &hdr);
2177         encode_savefh(xdr, &hdr);
2178         encode_putfh(xdr, args->dir_fh, &hdr);
2179         encode_link(xdr, args->name, &hdr);
2180         encode_restorefh(xdr, &hdr);
2181         encode_getfattr(xdr, args->bitmask, &hdr);
2182         encode_nops(&hdr);
2183 }
2184
2185 /*
2186  * Encode CREATE request
2187  */
2188 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2189                                 const struct nfs4_create_arg *args)
2190 {
2191         struct compound_hdr hdr = {
2192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193         };
2194
2195         encode_compound_hdr(xdr, req, &hdr);
2196         encode_sequence(xdr, &args->seq_args, &hdr);
2197         encode_putfh(xdr, args->dir_fh, &hdr);
2198         encode_create(xdr, args, &hdr);
2199         encode_getfh(xdr, &hdr);
2200         encode_getfattr(xdr, args->bitmask, &hdr);
2201         encode_nops(&hdr);
2202 }
2203
2204 /*
2205  * Encode SYMLINK request
2206  */
2207 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                                  const struct nfs4_create_arg *args)
2209 {
2210         nfs4_xdr_enc_create(req, xdr, args);
2211 }
2212
2213 /*
2214  * Encode GETATTR request
2215  */
2216 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2217                                  const struct nfs4_getattr_arg *args)
2218 {
2219         struct compound_hdr hdr = {
2220                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221         };
2222
2223         encode_compound_hdr(xdr, req, &hdr);
2224         encode_sequence(xdr, &args->seq_args, &hdr);
2225         encode_putfh(xdr, args->fh, &hdr);
2226         encode_getfattr(xdr, args->bitmask, &hdr);
2227         encode_nops(&hdr);
2228 }
2229
2230 /*
2231  * Encode a CLOSE request
2232  */
2233 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2234                                struct nfs_closeargs *args)
2235 {
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->fh, &hdr);
2243         encode_close(xdr, args, &hdr);
2244         encode_getfattr(xdr, args->bitmask, &hdr);
2245         encode_nops(&hdr);
2246 }
2247
2248 /*
2249  * Encode an OPEN request
2250  */
2251 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                               struct nfs_openargs *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_open(xdr, args, &hdr);
2262         encode_getfh(xdr, &hdr);
2263         if (args->access)
2264                 encode_access(xdr, args->access, &hdr);
2265         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2266         encode_nops(&hdr);
2267 }
2268
2269 /*
2270  * Encode an OPEN_CONFIRM request
2271  */
2272 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2273                                       struct xdr_stream *xdr,
2274                                       struct nfs_open_confirmargs *args)
2275 {
2276         struct compound_hdr hdr = {
2277                 .nops   = 0,
2278         };
2279
2280         encode_compound_hdr(xdr, req, &hdr);
2281         encode_putfh(xdr, args->fh, &hdr);
2282         encode_open_confirm(xdr, args, &hdr);
2283         encode_nops(&hdr);
2284 }
2285
2286 /*
2287  * Encode an OPEN request with no attributes.
2288  */
2289 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2290                                      struct xdr_stream *xdr,
2291                                      struct nfs_openargs *args)
2292 {
2293         struct compound_hdr hdr = {
2294                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2295         };
2296
2297         encode_compound_hdr(xdr, req, &hdr);
2298         encode_sequence(xdr, &args->seq_args, &hdr);
2299         encode_putfh(xdr, args->fh, &hdr);
2300         encode_open(xdr, args, &hdr);
2301         if (args->access)
2302                 encode_access(xdr, args->access, &hdr);
2303         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode an OPEN_DOWNGRADE request
2309  */
2310 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2311                                         struct xdr_stream *xdr,
2312                                         struct nfs_closeargs *args)
2313 {
2314         struct compound_hdr hdr = {
2315                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2316         };
2317
2318         encode_compound_hdr(xdr, req, &hdr);
2319         encode_sequence(xdr, &args->seq_args, &hdr);
2320         encode_putfh(xdr, args->fh, &hdr);
2321         encode_open_downgrade(xdr, args, &hdr);
2322         encode_getfattr(xdr, args->bitmask, &hdr);
2323         encode_nops(&hdr);
2324 }
2325
2326 /*
2327  * Encode a LOCK request
2328  */
2329 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2330                               struct nfs_lock_args *args)
2331 {
2332         struct compound_hdr hdr = {
2333                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334         };
2335
2336         encode_compound_hdr(xdr, req, &hdr);
2337         encode_sequence(xdr, &args->seq_args, &hdr);
2338         encode_putfh(xdr, args->fh, &hdr);
2339         encode_lock(xdr, args, &hdr);
2340         encode_nops(&hdr);
2341 }
2342
2343 /*
2344  * Encode a LOCKT request
2345  */
2346 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2347                                struct nfs_lockt_args *args)
2348 {
2349         struct compound_hdr hdr = {
2350                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351         };
2352
2353         encode_compound_hdr(xdr, req, &hdr);
2354         encode_sequence(xdr, &args->seq_args, &hdr);
2355         encode_putfh(xdr, args->fh, &hdr);
2356         encode_lockt(xdr, args, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCKU request
2362  */
2363 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                                struct nfs_locku_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_locku(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2378                                            struct xdr_stream *xdr,
2379                                         struct nfs_release_lockowner_args *args)
2380 {
2381         struct compound_hdr hdr = {
2382                 .minorversion = 0,
2383         };
2384
2385         encode_compound_hdr(xdr, req, &hdr);
2386         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2387         encode_nops(&hdr);
2388 }
2389
2390 /*
2391  * Encode a READLINK request
2392  */
2393 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2394                                   const struct nfs4_readlink *args)
2395 {
2396         struct compound_hdr hdr = {
2397                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2398         };
2399
2400         encode_compound_hdr(xdr, req, &hdr);
2401         encode_sequence(xdr, &args->seq_args, &hdr);
2402         encode_putfh(xdr, args->fh, &hdr);
2403         encode_readlink(xdr, args, req, &hdr);
2404
2405         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2406                         args->pgbase, args->pglen);
2407         encode_nops(&hdr);
2408 }
2409
2410 /*
2411  * Encode a READDIR request
2412  */
2413 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2414                                  const struct nfs4_readdir_arg *args)
2415 {
2416         struct compound_hdr hdr = {
2417                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418         };
2419
2420         encode_compound_hdr(xdr, req, &hdr);
2421         encode_sequence(xdr, &args->seq_args, &hdr);
2422         encode_putfh(xdr, args->fh, &hdr);
2423         encode_readdir(xdr, args, req, &hdr);
2424
2425         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2426                          args->pgbase, args->count);
2427         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2428                         __func__, hdr.replen << 2, args->pages,
2429                         args->pgbase, args->count);
2430         encode_nops(&hdr);
2431 }
2432
2433 /*
2434  * Encode a READ request
2435  */
2436 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2437                               struct nfs_pgio_args *args)
2438 {
2439         struct compound_hdr hdr = {
2440                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2441         };
2442
2443         encode_compound_hdr(xdr, req, &hdr);
2444         encode_sequence(xdr, &args->seq_args, &hdr);
2445         encode_putfh(xdr, args->fh, &hdr);
2446         encode_read(xdr, args, &hdr);
2447
2448         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2449                          args->pages, args->pgbase, args->count);
2450         req->rq_rcv_buf.flags |= XDRBUF_READ;
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode an SETATTR request
2456  */
2457 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                                  struct nfs_setattrargs *args)
2459 {
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_setattr(xdr, args, args->server, &hdr);
2468         encode_getfattr(xdr, args->bitmask, &hdr);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode a GETACL request
2474  */
2475 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                 struct nfs_getaclargs *args)
2477 {
2478         struct compound_hdr hdr = {
2479                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480         };
2481         uint32_t replen;
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2487         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2488
2489         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2490                 args->acl_pages, args->acl_pgbase, args->acl_len);
2491
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * Encode a WRITE request
2497  */
2498 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                struct nfs_pgio_args *args)
2500 {
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_write(xdr, args, &hdr);
2509         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2510         if (args->bitmask)
2511                 encode_getfattr(xdr, args->bitmask, &hdr);
2512         encode_nops(&hdr);
2513 }
2514
2515 /*
2516  *  a COMMIT request
2517  */
2518 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2519                                 struct nfs_commitargs *args)
2520 {
2521         struct compound_hdr hdr = {
2522                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2523         };
2524
2525         encode_compound_hdr(xdr, req, &hdr);
2526         encode_sequence(xdr, &args->seq_args, &hdr);
2527         encode_putfh(xdr, args->fh, &hdr);
2528         encode_commit(xdr, args, &hdr);
2529         encode_nops(&hdr);
2530 }
2531
2532 /*
2533  * FSINFO request
2534  */
2535 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2536                                 struct nfs4_fsinfo_arg *args)
2537 {
2538         struct compound_hdr hdr = {
2539                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_sequence(xdr, &args->seq_args, &hdr);
2544         encode_putfh(xdr, args->fh, &hdr);
2545         encode_fsinfo(xdr, args->bitmask, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * a PATHCONF request
2551  */
2552 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                   const struct nfs4_pathconf_arg *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2563                            &hdr);
2564         encode_nops(&hdr);
2565 }
2566
2567 /*
2568  * a STATFS request
2569  */
2570 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2571                                 const struct nfs4_statfs_arg *args)
2572 {
2573         struct compound_hdr hdr = {
2574                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575         };
2576
2577         encode_compound_hdr(xdr, req, &hdr);
2578         encode_sequence(xdr, &args->seq_args, &hdr);
2579         encode_putfh(xdr, args->fh, &hdr);
2580         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2581                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * GETATTR_BITMAP request
2587  */
2588 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2589                                      struct xdr_stream *xdr,
2590                                      struct nfs4_server_caps_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fhandle, &hdr);
2599         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2600                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2601                            FATTR4_WORD0_LINK_SUPPORT|
2602                            FATTR4_WORD0_SYMLINK_SUPPORT|
2603                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2604         encode_nops(&hdr);
2605 }
2606
2607 /*
2608  * a RENEW request
2609  */
2610 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2611                                struct nfs_client *clp)
2612 {
2613         struct compound_hdr hdr = {
2614                 .nops   = 0,
2615         };
2616
2617         encode_compound_hdr(xdr, req, &hdr);
2618         encode_renew(xdr, clp->cl_clientid, &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * a SETCLIENTID request
2624  */
2625 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2626                                      struct xdr_stream *xdr,
2627                                      struct nfs4_setclientid *sc)
2628 {
2629         struct compound_hdr hdr = {
2630                 .nops   = 0,
2631         };
2632
2633         encode_compound_hdr(xdr, req, &hdr);
2634         encode_setclientid(xdr, sc, &hdr);
2635         encode_nops(&hdr);
2636 }
2637
2638 /*
2639  * a SETCLIENTID_CONFIRM request
2640  */
2641 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2642                                              struct xdr_stream *xdr,
2643                                              struct nfs4_setclientid_res *arg)
2644 {
2645         struct compound_hdr hdr = {
2646                 .nops   = 0,
2647         };
2648
2649         encode_compound_hdr(xdr, req, &hdr);
2650         encode_setclientid_confirm(xdr, arg, &hdr);
2651         encode_nops(&hdr);
2652 }
2653
2654 /*
2655  * DELEGRETURN request
2656  */
2657 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2658                                      struct xdr_stream *xdr,
2659                                      const struct nfs4_delegreturnargs *args)
2660 {
2661         struct compound_hdr hdr = {
2662                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2663         };
2664
2665         encode_compound_hdr(xdr, req, &hdr);
2666         encode_sequence(xdr, &args->seq_args, &hdr);
2667         encode_putfh(xdr, args->fhandle, &hdr);
2668         encode_getfattr(xdr, args->bitmask, &hdr);
2669         encode_delegreturn(xdr, args->stateid, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * Encode FS_LOCATIONS request
2675  */
2676 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2677                                       struct xdr_stream *xdr,
2678                                       struct nfs4_fs_locations_arg *args)
2679 {
2680         struct compound_hdr hdr = {
2681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682         };
2683         uint32_t replen;
2684
2685         encode_compound_hdr(xdr, req, &hdr);
2686         encode_sequence(xdr, &args->seq_args, &hdr);
2687         if (args->migration) {
2688                 encode_putfh(xdr, args->fh, &hdr);
2689                 replen = hdr.replen;
2690                 encode_fs_locations(xdr, args->bitmask, &hdr);
2691                 if (args->renew)
2692                         encode_renew(xdr, args->clientid, &hdr);
2693         } else {
2694                 encode_putfh(xdr, args->dir_fh, &hdr);
2695                 encode_lookup(xdr, args->name, &hdr);
2696                 replen = hdr.replen;
2697                 encode_fs_locations(xdr, args->bitmask, &hdr);
2698         }
2699
2700         /* Set up reply kvec to capture returned fs_locations array. */
2701         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2702                         0, PAGE_SIZE);
2703         encode_nops(&hdr);
2704 }
2705
2706 /*
2707  * Encode SECINFO request
2708  */
2709 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2710                                 struct xdr_stream *xdr,
2711                                 struct nfs4_secinfo_arg *args)
2712 {
2713         struct compound_hdr hdr = {
2714                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2715         };
2716
2717         encode_compound_hdr(xdr, req, &hdr);
2718         encode_sequence(xdr, &args->seq_args, &hdr);
2719         encode_putfh(xdr, args->dir_fh, &hdr);
2720         encode_secinfo(xdr, args->name, &hdr);
2721         encode_nops(&hdr);
2722 }
2723
2724 /*
2725  * Encode FSID_PRESENT request
2726  */
2727 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2728                                       struct xdr_stream *xdr,
2729                                       struct nfs4_fsid_present_arg *args)
2730 {
2731         struct compound_hdr hdr = {
2732                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2733         };
2734
2735         encode_compound_hdr(xdr, req, &hdr);
2736         encode_sequence(xdr, &args->seq_args, &hdr);
2737         encode_putfh(xdr, args->fh, &hdr);
2738         encode_getfh(xdr, &hdr);
2739         if (args->renew)
2740                 encode_renew(xdr, args->clientid, &hdr);
2741         encode_nops(&hdr);
2742 }
2743
2744 #if defined(CONFIG_NFS_V4_1)
2745 /*
2746  * BIND_CONN_TO_SESSION request
2747  */
2748 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2749                                 struct xdr_stream *xdr,
2750                                 struct nfs_client *clp)
2751 {
2752         struct compound_hdr hdr = {
2753                 .minorversion = clp->cl_mvops->minor_version,
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2758         encode_nops(&hdr);
2759 }
2760
2761 /*
2762  * EXCHANGE_ID request
2763  */
2764 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2765                                      struct xdr_stream *xdr,
2766                                      struct nfs41_exchange_id_args *args)
2767 {
2768         struct compound_hdr hdr = {
2769                 .minorversion = args->client->cl_mvops->minor_version,
2770         };
2771
2772         encode_compound_hdr(xdr, req, &hdr);
2773         encode_exchange_id(xdr, args, &hdr);
2774         encode_nops(&hdr);
2775 }
2776
2777 /*
2778  * a CREATE_SESSION request
2779  */
2780 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2781                                         struct xdr_stream *xdr,
2782                                         struct nfs41_create_session_args *args)
2783 {
2784         struct compound_hdr hdr = {
2785                 .minorversion = args->client->cl_mvops->minor_version,
2786         };
2787
2788         encode_compound_hdr(xdr, req, &hdr);
2789         encode_create_session(xdr, args, &hdr);
2790         encode_nops(&hdr);
2791 }
2792
2793 /*
2794  * a DESTROY_SESSION request
2795  */
2796 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2797                                          struct xdr_stream *xdr,
2798                                          struct nfs4_session *session)
2799 {
2800         struct compound_hdr hdr = {
2801                 .minorversion = session->clp->cl_mvops->minor_version,
2802         };
2803
2804         encode_compound_hdr(xdr, req, &hdr);
2805         encode_destroy_session(xdr, session, &hdr);
2806         encode_nops(&hdr);
2807 }
2808
2809 /*
2810  * a DESTROY_CLIENTID request
2811  */
2812 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2813                                          struct xdr_stream *xdr,
2814                                          struct nfs_client *clp)
2815 {
2816         struct compound_hdr hdr = {
2817                 .minorversion = clp->cl_mvops->minor_version,
2818         };
2819
2820         encode_compound_hdr(xdr, req, &hdr);
2821         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2822         encode_nops(&hdr);
2823 }
2824
2825 /*
2826  * a SEQUENCE request
2827  */
2828 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2829                                   struct nfs4_sequence_args *args)
2830 {
2831         struct compound_hdr hdr = {
2832                 .minorversion = nfs4_xdr_minorversion(args),
2833         };
2834
2835         encode_compound_hdr(xdr, req, &hdr);
2836         encode_sequence(xdr, args, &hdr);
2837         encode_nops(&hdr);
2838 }
2839
2840 /*
2841  * a GET_LEASE_TIME request
2842  */
2843 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2844                                         struct xdr_stream *xdr,
2845                                         struct nfs4_get_lease_time_args *args)
2846 {
2847         struct compound_hdr hdr = {
2848                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2849         };
2850         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2851
2852         encode_compound_hdr(xdr, req, &hdr);
2853         encode_sequence(xdr, &args->la_seq_args, &hdr);
2854         encode_putrootfh(xdr, &hdr);
2855         encode_fsinfo(xdr, lease_bitmap, &hdr);
2856         encode_nops(&hdr);
2857 }
2858
2859 /*
2860  * a RECLAIM_COMPLETE request
2861  */
2862 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2863                                           struct xdr_stream *xdr,
2864                                 struct nfs41_reclaim_complete_args *args)
2865 {
2866         struct compound_hdr hdr = {
2867                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2868         };
2869
2870         encode_compound_hdr(xdr, req, &hdr);
2871         encode_sequence(xdr, &args->seq_args, &hdr);
2872         encode_reclaim_complete(xdr, args, &hdr);
2873         encode_nops(&hdr);
2874 }
2875
2876 /*
2877  * Encode GETDEVICEINFO request
2878  */
2879 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2880                                        struct xdr_stream *xdr,
2881                                        struct nfs4_getdeviceinfo_args *args)
2882 {
2883         struct compound_hdr hdr = {
2884                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2885         };
2886
2887         encode_compound_hdr(xdr, req, &hdr);
2888         encode_sequence(xdr, &args->seq_args, &hdr);
2889         encode_getdeviceinfo(xdr, args, &hdr);
2890
2891         /* set up reply kvec. Subtract notification bitmap max size (2)
2892          * so that notification bitmap is put in xdr_buf tail */
2893         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2894                          args->pdev->pages, args->pdev->pgbase,
2895                          args->pdev->pglen);
2896
2897         encode_nops(&hdr);
2898 }
2899
2900 /*
2901  *  Encode LAYOUTGET request
2902  */
2903 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2904                                    struct xdr_stream *xdr,
2905                                    struct nfs4_layoutget_args *args)
2906 {
2907         struct compound_hdr hdr = {
2908                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2909         };
2910
2911         encode_compound_hdr(xdr, req, &hdr);
2912         encode_sequence(xdr, &args->seq_args, &hdr);
2913         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2914         encode_layoutget(xdr, args, &hdr);
2915
2916         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2917             args->layout.pages, 0, args->layout.pglen);
2918
2919         encode_nops(&hdr);
2920 }
2921
2922 /*
2923  *  Encode LAYOUTCOMMIT request
2924  */
2925 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2926                                       struct xdr_stream *xdr,
2927                                       struct nfs4_layoutcommit_args *args)
2928 {
2929         struct nfs4_layoutcommit_data *data =
2930                 container_of(args, struct nfs4_layoutcommit_data, args);
2931         struct compound_hdr hdr = {
2932                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2933         };
2934
2935         encode_compound_hdr(xdr, req, &hdr);
2936         encode_sequence(xdr, &args->seq_args, &hdr);
2937         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2938         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2939         encode_getfattr(xdr, args->bitmask, &hdr);
2940         encode_nops(&hdr);
2941 }
2942
2943 /*
2944  * Encode LAYOUTRETURN request
2945  */
2946 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2947                                       struct xdr_stream *xdr,
2948                                       struct nfs4_layoutreturn_args *args)
2949 {
2950         struct compound_hdr hdr = {
2951                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2952         };
2953
2954         encode_compound_hdr(xdr, req, &hdr);
2955         encode_sequence(xdr, &args->seq_args, &hdr);
2956         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2957         encode_layoutreturn(xdr, args, &hdr);
2958         encode_nops(&hdr);
2959 }
2960
2961 /*
2962  * Encode SECINFO_NO_NAME request
2963  */
2964 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2965                                         struct xdr_stream *xdr,
2966                                         struct nfs41_secinfo_no_name_args *args)
2967 {
2968         struct compound_hdr hdr = {
2969                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2970         };
2971
2972         encode_compound_hdr(xdr, req, &hdr);
2973         encode_sequence(xdr, &args->seq_args, &hdr);
2974         encode_putrootfh(xdr, &hdr);
2975         encode_secinfo_no_name(xdr, args, &hdr);
2976         encode_nops(&hdr);
2977         return 0;
2978 }
2979
2980 /*
2981  *  Encode TEST_STATEID request
2982  */
2983 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2984                                       struct xdr_stream *xdr,
2985                                       struct nfs41_test_stateid_args *args)
2986 {
2987         struct compound_hdr hdr = {
2988                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989         };
2990
2991         encode_compound_hdr(xdr, req, &hdr);
2992         encode_sequence(xdr, &args->seq_args, &hdr);
2993         encode_test_stateid(xdr, args, &hdr);
2994         encode_nops(&hdr);
2995 }
2996
2997 /*
2998  *  Encode FREE_STATEID request
2999  */
3000 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3001                                      struct xdr_stream *xdr,
3002                                      struct nfs41_free_stateid_args *args)
3003 {
3004         struct compound_hdr hdr = {
3005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006         };
3007
3008         encode_compound_hdr(xdr, req, &hdr);
3009         encode_sequence(xdr, &args->seq_args, &hdr);
3010         encode_free_stateid(xdr, args, &hdr);
3011         encode_nops(&hdr);
3012 }
3013 #endif /* CONFIG_NFS_V4_1 */
3014
3015 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3016 {
3017         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3018                 "Remaining buffer length is %tu words.\n",
3019                 func, xdr->end - xdr->p);
3020 }
3021
3022 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3023 {
3024         __be32 *p;
3025
3026         p = xdr_inline_decode(xdr, 4);
3027         if (unlikely(!p))
3028                 goto out_overflow;
3029         *len = be32_to_cpup(p);
3030         p = xdr_inline_decode(xdr, *len);
3031         if (unlikely(!p))
3032                 goto out_overflow;
3033         *string = (char *)p;
3034         return 0;
3035 out_overflow:
3036         print_overflow_msg(__func__, xdr);
3037         return -EIO;
3038 }
3039
3040 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3041 {
3042         __be32 *p;
3043
3044         p = xdr_inline_decode(xdr, 8);
3045         if (unlikely(!p))
3046                 goto out_overflow;
3047         hdr->status = be32_to_cpup(p++);
3048         hdr->taglen = be32_to_cpup(p);
3049
3050         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3051         if (unlikely(!p))
3052                 goto out_overflow;
3053         hdr->tag = (char *)p;
3054         p += XDR_QUADLEN(hdr->taglen);
3055         hdr->nops = be32_to_cpup(p);
3056         if (unlikely(hdr->nops < 1))
3057                 return nfs4_stat_to_errno(hdr->status);
3058         return 0;
3059 out_overflow:
3060         print_overflow_msg(__func__, xdr);
3061         return -EIO;
3062 }
3063
3064 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3065                 int *nfs_retval)
3066 {
3067         __be32 *p;
3068         uint32_t opnum;
3069         int32_t nfserr;
3070
3071         p = xdr_inline_decode(xdr, 8);
3072         if (unlikely(!p))
3073                 goto out_overflow;
3074         opnum = be32_to_cpup(p++);
3075         if (unlikely(opnum != expected))
3076                 goto out_bad_operation;
3077         nfserr = be32_to_cpup(p);
3078         if (nfserr == NFS_OK)
3079                 *nfs_retval = 0;
3080         else
3081                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3082         return true;
3083 out_bad_operation:
3084         dprintk("nfs: Server returned operation"
3085                 " %d but we issued a request for %d\n",
3086                         opnum, expected);
3087         *nfs_retval = -EREMOTEIO;
3088         return false;
3089 out_overflow:
3090         print_overflow_msg(__func__, xdr);
3091         *nfs_retval = -EIO;
3092         return false;
3093 }
3094
3095 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3096 {
3097         int retval;
3098
3099         __decode_op_hdr(xdr, expected, &retval);
3100         return retval;
3101 }
3102
3103 /* Dummy routine */
3104 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3105 {
3106         __be32 *p;
3107         unsigned int strlen;
3108         char *str;
3109
3110         p = xdr_inline_decode(xdr, 12);
3111         if (likely(p))
3112                 return decode_opaque_inline(xdr, &strlen, &str);
3113         print_overflow_msg(__func__, xdr);
3114         return -EIO;
3115 }
3116
3117 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3118 {
3119         uint32_t bmlen;
3120         __be32 *p;
3121
3122         p = xdr_inline_decode(xdr, 4);
3123         if (unlikely(!p))
3124                 goto out_overflow;
3125         bmlen = be32_to_cpup(p);
3126
3127         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3128         p = xdr_inline_decode(xdr, (bmlen << 2));
3129         if (unlikely(!p))
3130                 goto out_overflow;
3131         if (bmlen > 0) {
3132                 bitmap[0] = be32_to_cpup(p++);
3133                 if (bmlen > 1) {
3134                         bitmap[1] = be32_to_cpup(p++);
3135                         if (bmlen > 2)
3136                                 bitmap[2] = be32_to_cpup(p);
3137                 }
3138         }
3139         return 0;
3140 out_overflow:
3141         print_overflow_msg(__func__, xdr);
3142         return -EIO;
3143 }
3144
3145 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3146 {
3147         __be32 *p;
3148
3149         p = xdr_inline_decode(xdr, 4);
3150         if (unlikely(!p))
3151                 goto out_overflow;
3152         *attrlen = be32_to_cpup(p);
3153         *savep = xdr_stream_pos(xdr);
3154         return 0;
3155 out_overflow:
3156         print_overflow_msg(__func__, xdr);
3157         return -EIO;
3158 }
3159
3160 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3161 {
3162         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3163                 int ret;
3164                 ret = decode_attr_bitmap(xdr, bitmask);
3165                 if (unlikely(ret < 0))
3166                         return ret;
3167                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3168         } else
3169                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3170         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3171                 bitmask[0], bitmask[1], bitmask[2]);
3172         return 0;
3173 }
3174
3175 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3176 {
3177         __be32 *p;
3178         int ret = 0;
3179
3180         *type = 0;
3181         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3182                 return -EIO;
3183         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3184                 p = xdr_inline_decode(xdr, 4);
3185                 if (unlikely(!p))
3186                         goto out_overflow;
3187                 *type = be32_to_cpup(p);
3188                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3189                         dprintk("%s: bad type %d\n", __func__, *type);
3190                         return -EIO;
3191                 }
3192                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3193                 ret = NFS_ATTR_FATTR_TYPE;
3194         }
3195         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3196         return ret;
3197 out_overflow:
3198         print_overflow_msg(__func__, xdr);
3199         return -EIO;
3200 }
3201
3202 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3203                                       uint32_t *bitmap, uint32_t *type)
3204 {
3205         __be32 *p;
3206
3207         *type = 0;
3208         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3209                 return -EIO;
3210         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3211                 p = xdr_inline_decode(xdr, 4);
3212                 if (unlikely(!p))
3213                         goto out_overflow;
3214                 *type = be32_to_cpup(p);
3215                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3216         }
3217         dprintk("%s: expire type=0x%x\n", __func__, *type);
3218         return 0;
3219 out_overflow:
3220         print_overflow_msg(__func__, xdr);
3221         return -EIO;
3222 }
3223
3224 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3225 {
3226         __be32 *p;
3227         int ret = 0;
3228
3229         *change = 0;
3230         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3231                 return -EIO;
3232         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3233                 p = xdr_inline_decode(xdr, 8);
3234                 if (unlikely(!p))
3235                         goto out_overflow;
3236                 xdr_decode_hyper(p, change);
3237                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3238                 ret = NFS_ATTR_FATTR_CHANGE;
3239         }
3240         dprintk("%s: change attribute=%Lu\n", __func__,
3241                         (unsigned long long)*change);
3242         return ret;
3243 out_overflow:
3244         print_overflow_msg(__func__, xdr);
3245         return -EIO;
3246 }
3247
3248 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3249 {
3250         __be32 *p;
3251         int ret = 0;
3252
3253         *size = 0;
3254         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3255                 return -EIO;
3256         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3257                 p = xdr_inline_decode(xdr, 8);
3258                 if (unlikely(!p))
3259                         goto out_overflow;
3260                 xdr_decode_hyper(p, size);
3261                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3262                 ret = NFS_ATTR_FATTR_SIZE;
3263         }
3264         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3265         return ret;
3266 out_overflow:
3267         print_overflow_msg(__func__, xdr);
3268         return -EIO;
3269 }
3270
3271 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3272 {
3273         __be32 *p;
3274
3275         *res = 0;
3276         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3277                 return -EIO;
3278         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3279                 p = xdr_inline_decode(xdr, 4);
3280                 if (unlikely(!p))
3281                         goto out_overflow;
3282                 *res = be32_to_cpup(p);
3283                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3284         }
3285         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3286         return 0;
3287 out_overflow:
3288         print_overflow_msg(__func__, xdr);
3289         return -EIO;
3290 }
3291
3292 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3293 {
3294         __be32 *p;
3295
3296         *res = 0;
3297         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3298                 return -EIO;
3299         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3300                 p = xdr_inline_decode(xdr, 4);
3301                 if (unlikely(!p))
3302                         goto out_overflow;
3303                 *res = be32_to_cpup(p);
3304                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3305         }
3306         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3307         return 0;
3308 out_overflow:
3309         print_overflow_msg(__func__, xdr);
3310         return -EIO;
3311 }
3312
3313 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3314 {
3315         __be32 *p;
3316         int ret = 0;
3317
3318         fsid->major = 0;
3319         fsid->minor = 0;
3320         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3321                 return -EIO;
3322         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3323                 p = xdr_inline_decode(xdr, 16);
3324                 if (unlikely(!p))
3325                         goto out_overflow;
3326                 p = xdr_decode_hyper(p, &fsid->major);
3327                 xdr_decode_hyper(p, &fsid->minor);
3328                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3329                 ret = NFS_ATTR_FATTR_FSID;
3330         }
3331         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3332                         (unsigned long long)fsid->major,
3333                         (unsigned long long)fsid->minor);
3334         return ret;
3335 out_overflow:
3336         print_overflow_msg(__func__, xdr);
3337         return -EIO;
3338 }
3339
3340 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3341 {
3342         __be32 *p;
3343
3344         *res = 60;
3345         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3346                 return -EIO;
3347         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3348                 p = xdr_inline_decode(xdr, 4);
3349                 if (unlikely(!p))
3350                         goto out_overflow;
3351                 *res = be32_to_cpup(p);
3352                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3353         }
3354         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3355         return 0;
3356 out_overflow:
3357         print_overflow_msg(__func__, xdr);
3358         return -EIO;
3359 }
3360
3361 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3362 {
3363         __be32 *p;
3364
3365         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3366                 return -EIO;
3367         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3368                 p = xdr_inline_decode(xdr, 4);
3369                 if (unlikely(!p))
3370                         goto out_overflow;
3371                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3372                 *res = -be32_to_cpup(p);
3373         }
3374         return 0;
3375 out_overflow:
3376         print_overflow_msg(__func__, xdr);
3377         return -EIO;
3378 }
3379
3380 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3381 {
3382         __be32 *p;
3383         int len;
3384
3385         if (fh != NULL)
3386                 memset(fh, 0, sizeof(*fh));
3387
3388         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3389                 return -EIO;
3390         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3391                 p = xdr_inline_decode(xdr, 4);
3392                 if (unlikely(!p))
3393                         goto out_overflow;
3394                 len = be32_to_cpup(p);
3395                 if (len > NFS4_FHSIZE)
3396                         return -EIO;
3397                 p = xdr_inline_decode(xdr, len);
3398                 if (unlikely(!p))
3399                         goto out_overflow;
3400                 if (fh != NULL) {
3401                         memcpy(fh->data, p, len);
3402                         fh->size = len;
3403                 }
3404                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3405         }
3406         return 0;
3407 out_overflow:
3408         print_overflow_msg(__func__, xdr);
3409         return -EIO;
3410 }
3411
3412 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3413 {
3414         __be32 *p;
3415
3416         *res = 0;
3417         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3418                 return -EIO;
3419         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3420                 p = xdr_inline_decode(xdr, 4);
3421                 if (unlikely(!p))
3422                         goto out_overflow;
3423                 *res = be32_to_cpup(p);
3424                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3425         }
3426         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3427         return 0;
3428 out_overflow:
3429         print_overflow_msg(__func__, xdr);
3430         return -EIO;
3431 }
3432
3433 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3434 {
3435         __be32 *p;
3436         int ret = 0;
3437
3438         *fileid = 0;
3439         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3440                 return -EIO;
3441         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3442                 p = xdr_inline_decode(xdr, 8);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 xdr_decode_hyper(p, fileid);
3446                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3447                 ret = NFS_ATTR_FATTR_FILEID;
3448         }
3449         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3450         return ret;
3451 out_overflow:
3452         print_overflow_msg(__func__, xdr);
3453         return -EIO;
3454 }
3455
3456 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3457 {
3458         __be32 *p;
3459         int ret = 0;
3460
3461         *fileid = 0;
3462         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3463                 return -EIO;
3464         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3465                 p = xdr_inline_decode(xdr, 8);
3466                 if (unlikely(!p))
3467                         goto out_overflow;
3468                 xdr_decode_hyper(p, fileid);
3469                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3470                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3471         }
3472         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3473         return ret;
3474 out_overflow:
3475         print_overflow_msg(__func__, xdr);
3476         return -EIO;
3477 }
3478
3479 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3480 {
3481         __be32 *p;
3482         int status = 0;
3483
3484         *res = 0;
3485         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3486                 return -EIO;
3487         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3488                 p = xdr_inline_decode(xdr, 8);
3489                 if (unlikely(!p))
3490                         goto out_overflow;
3491                 xdr_decode_hyper(p, res);
3492                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3493         }
3494         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3495         return status;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_files_free(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_FREE - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
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_FREE;
3515         }
3516         dprintk("%s: files free=%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_total(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_TOTAL - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
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_TOTAL;
3537         }
3538         dprintk("%s: files total=%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_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3546 {
3547         u32 n;
3548         __be32 *p;
3549         int status = 0;
3550
3551         p = xdr_inline_decode(xdr, 4);
3552         if (unlikely(!p))
3553                 goto out_overflow;
3554         n = be32_to_cpup(p);
3555         if (n == 0)
3556                 goto root_path;
3557         dprintk("pathname4: ");
3558         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3559                 dprintk("cannot parse %d components in path\n", n);
3560                 goto out_eio;
3561         }
3562         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3563                 struct nfs4_string *component = &path->components[path->ncomponents];
3564                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3565                 if (unlikely(status != 0))
3566                         goto out_eio;
3567                 ifdebug (XDR)
3568                         pr_cont("%s%.*s ",
3569                                 (path->ncomponents != n ? "/ " : ""),
3570                                 component->len, component->data);
3571         }
3572 out:
3573         return status;
3574 root_path:
3575 /* a root pathname is sent as a zero component4 */
3576         path->ncomponents = 1;
3577         path->components[0].len=0;
3578         path->components[0].data=NULL;
3579         dprintk("pathname4: /\n");
3580         goto out;
3581 out_eio:
3582         dprintk(" status %d", status);
3583         status = -EIO;
3584         goto out;
3585 out_overflow:
3586         print_overflow_msg(__func__, xdr);
3587         return -EIO;
3588 }
3589
3590 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3591 {
3592         int n;
3593         __be32 *p;
3594         int status = -EIO;
3595
3596         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3597                 goto out;
3598         status = 0;
3599         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3600                 goto out;
3601         status = -EIO;
3602         /* Ignore borken servers that return unrequested attrs */
3603         if (unlikely(res == NULL))
3604                 goto out;
3605         dprintk("%s: fsroot:\n", __func__);
3606         status = decode_pathname(xdr, &res->fs_path);
3607         if (unlikely(status != 0))
3608                 goto out;
3609         p = xdr_inline_decode(xdr, 4);
3610         if (unlikely(!p))
3611                 goto out_overflow;
3612         n = be32_to_cpup(p);
3613         if (n <= 0)
3614                 goto out_eio;
3615         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3616                 u32 m;
3617                 struct nfs4_fs_location *loc;
3618
3619                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3620                         break;
3621                 loc = &res->locations[res->nlocations];
3622                 p = xdr_inline_decode(xdr, 4);
3623                 if (unlikely(!p))
3624                         goto out_overflow;
3625                 m = be32_to_cpup(p);
3626
3627                 dprintk("%s: servers:\n", __func__);
3628                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3629                         struct nfs4_string *server;
3630
3631                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3632                                 unsigned int i;
3633                                 dprintk("%s: using first %u of %u servers "
3634                                         "returned for location %u\n",
3635                                                 __func__,
3636                                                 NFS4_FS_LOCATION_MAXSERVERS,
3637                                                 m, res->nlocations);
3638                                 for (i = loc->nservers; i < m; i++) {
3639                                         unsigned int len;
3640                                         char *data;
3641                                         status = decode_opaque_inline(xdr, &len, &data);
3642                                         if (unlikely(status != 0))
3643                                                 goto out_eio;
3644                                 }
3645                                 break;
3646                         }
3647                         server = &loc->servers[loc->nservers];
3648                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3649                         if (unlikely(status != 0))
3650                                 goto out_eio;
3651                         dprintk("%s ", server->data);
3652                 }
3653                 status = decode_pathname(xdr, &loc->rootpath);
3654                 if (unlikely(status != 0))
3655                         goto out_eio;
3656         }
3657         if (res->nlocations != 0)
3658                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3659 out:
3660         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3661         return status;
3662 out_overflow:
3663         print_overflow_msg(__func__, xdr);
3664 out_eio:
3665         status = -EIO;
3666         goto out;
3667 }
3668
3669 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3670 {
3671         __be32 *p;
3672         int status = 0;
3673
3674         *res = 0;
3675         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3676                 return -EIO;
3677         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3678                 p = xdr_inline_decode(xdr, 8);
3679                 if (unlikely(!p))
3680                         goto out_overflow;
3681                 xdr_decode_hyper(p, res);
3682                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3683         }
3684         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3685         return status;
3686 out_overflow:
3687         print_overflow_msg(__func__, xdr);
3688         return -EIO;
3689 }
3690
3691 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3692 {
3693         __be32 *p;
3694         int status = 0;
3695
3696         *maxlink = 1;
3697         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3698                 return -EIO;
3699         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3700                 p = xdr_inline_decode(xdr, 4);
3701                 if (unlikely(!p))
3702                         goto out_overflow;
3703                 *maxlink = be32_to_cpup(p);
3704                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3705         }
3706         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3707         return status;
3708 out_overflow:
3709         print_overflow_msg(__func__, xdr);
3710         return -EIO;
3711 }
3712
3713 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3714 {
3715         __be32 *p;
3716         int status = 0;
3717
3718         *maxname = 1024;
3719         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3720                 return -EIO;
3721         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3722                 p = xdr_inline_decode(xdr, 4);
3723                 if (unlikely(!p))
3724                         goto out_overflow;
3725                 *maxname = be32_to_cpup(p);
3726                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3727         }
3728         dprintk("%s: maxname=%u\n", __func__, *maxname);
3729         return status;
3730 out_overflow:
3731         print_overflow_msg(__func__, xdr);
3732         return -EIO;
3733 }
3734
3735 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3736 {
3737         __be32 *p;
3738         int status = 0;
3739
3740         *res = 1024;
3741         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3742                 return -EIO;
3743         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3744                 uint64_t maxread;
3745                 p = xdr_inline_decode(xdr, 8);
3746                 if (unlikely(!p))
3747                         goto out_overflow;
3748                 xdr_decode_hyper(p, &maxread);
3749                 if (maxread > 0x7FFFFFFF)
3750                         maxread = 0x7FFFFFFF;
3751                 *res = (uint32_t)maxread;
3752                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3753         }
3754         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3755         return status;
3756 out_overflow:
3757         print_overflow_msg(__func__, xdr);
3758         return -EIO;
3759 }
3760
3761 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3762 {
3763         __be32 *p;
3764         int status = 0;
3765
3766         *res = 1024;
3767         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3768                 return -EIO;
3769         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3770                 uint64_t maxwrite;
3771                 p = xdr_inline_decode(xdr, 8);
3772                 if (unlikely(!p))
3773                         goto out_overflow;
3774                 xdr_decode_hyper(p, &maxwrite);
3775                 if (maxwrite > 0x7FFFFFFF)
3776                         maxwrite = 0x7FFFFFFF;
3777                 *res = (uint32_t)maxwrite;
3778                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3779         }
3780         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3781         return status;
3782 out_overflow:
3783         print_overflow_msg(__func__, xdr);
3784         return -EIO;
3785 }
3786
3787 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3788 {
3789         uint32_t tmp;
3790         __be32 *p;
3791         int ret = 0;
3792
3793         *mode = 0;
3794         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3795                 return -EIO;
3796         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3797                 p = xdr_inline_decode(xdr, 4);
3798                 if (unlikely(!p))
3799                         goto out_overflow;
3800                 tmp = be32_to_cpup(p);
3801                 *mode = tmp & ~S_IFMT;
3802                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3803                 ret = NFS_ATTR_FATTR_MODE;
3804         }
3805         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3806         return ret;
3807 out_overflow:
3808         print_overflow_msg(__func__, xdr);
3809         return -EIO;
3810 }
3811
3812 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3813 {
3814         __be32 *p;
3815         int ret = 0;
3816
3817         *nlink = 1;
3818         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3819                 return -EIO;
3820         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3821                 p = xdr_inline_decode(xdr, 4);
3822                 if (unlikely(!p))
3823                         goto out_overflow;
3824                 *nlink = be32_to_cpup(p);
3825                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3826                 ret = NFS_ATTR_FATTR_NLINK;
3827         }
3828         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3829         return ret;
3830 out_overflow:
3831         print_overflow_msg(__func__, xdr);
3832         return -EIO;
3833 }
3834
3835 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3836                 const struct nfs_server *server, kuid_t *uid,
3837                 struct nfs4_string *owner_name)
3838 {
3839         uint32_t len;
3840         __be32 *p;
3841         int ret = 0;
3842
3843         *uid = make_kuid(&init_user_ns, -2);
3844         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3845                 return -EIO;
3846         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3847                 p = xdr_inline_decode(xdr, 4);
3848                 if (unlikely(!p))
3849                         goto out_overflow;
3850                 len = be32_to_cpup(p);
3851                 p = xdr_inline_decode(xdr, len);
3852                 if (unlikely(!p))
3853                         goto out_overflow;
3854                 if (owner_name != NULL) {
3855                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3856                         if (owner_name->data != NULL) {
3857                                 owner_name->len = len;
3858                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3859                         }
3860                 } else if (len < XDR_MAX_NETOBJ) {
3861                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3862                                 ret = NFS_ATTR_FATTR_OWNER;
3863                         else
3864                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3865                                                 __func__);
3866                 } else
3867                         dprintk("%s: name too long (%u)!\n",
3868                                         __func__, len);
3869                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3870         }
3871         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3872         return ret;
3873 out_overflow:
3874         print_overflow_msg(__func__, xdr);
3875         return -EIO;
3876 }
3877
3878 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3879                 const struct nfs_server *server, kgid_t *gid,
3880                 struct nfs4_string *group_name)
3881 {
3882         uint32_t len;
3883         __be32 *p;
3884         int ret = 0;
3885
3886         *gid = make_kgid(&init_user_ns, -2);
3887         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3888                 return -EIO;
3889         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3890                 p = xdr_inline_decode(xdr, 4);
3891                 if (unlikely(!p))
3892                         goto out_overflow;
3893                 len = be32_to_cpup(p);
3894                 p = xdr_inline_decode(xdr, len);
3895                 if (unlikely(!p))
3896                         goto out_overflow;
3897                 if (group_name != NULL) {
3898                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3899                         if (group_name->data != NULL) {
3900                                 group_name->len = len;
3901                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3902                         }
3903                 } else if (len < XDR_MAX_NETOBJ) {
3904                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3905                                 ret = NFS_ATTR_FATTR_GROUP;
3906                         else
3907                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3908                                                 __func__);
3909                 } else
3910                         dprintk("%s: name too long (%u)!\n",
3911                                         __func__, len);
3912                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3913         }
3914         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3915         return ret;
3916 out_overflow:
3917         print_overflow_msg(__func__, xdr);
3918         return -EIO;
3919 }
3920
3921 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3922 {
3923         uint32_t major = 0, minor = 0;
3924         __be32 *p;
3925         int ret = 0;
3926
3927         *rdev = MKDEV(0,0);
3928         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3929                 return -EIO;
3930         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3931                 dev_t tmp;
3932
3933                 p = xdr_inline_decode(xdr, 8);
3934                 if (unlikely(!p))
3935                         goto out_overflow;
3936                 major = be32_to_cpup(p++);
3937                 minor = be32_to_cpup(p);
3938                 tmp = MKDEV(major, minor);
3939                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3940                         *rdev = tmp;
3941                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3942                 ret = NFS_ATTR_FATTR_RDEV;
3943         }
3944         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3945         return ret;
3946 out_overflow:
3947         print_overflow_msg(__func__, xdr);
3948         return -EIO;
3949 }
3950
3951 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3952 {
3953         __be32 *p;
3954         int status = 0;
3955
3956         *res = 0;
3957         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3958                 return -EIO;
3959         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3960                 p = xdr_inline_decode(xdr, 8);
3961                 if (unlikely(!p))
3962                         goto out_overflow;
3963                 xdr_decode_hyper(p, res);
3964                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3965         }
3966         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3967         return status;
3968 out_overflow:
3969         print_overflow_msg(__func__, xdr);
3970         return -EIO;
3971 }
3972
3973 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975         __be32 *p;
3976         int status = 0;
3977
3978         *res = 0;
3979         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3980                 return -EIO;
3981         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3982                 p = xdr_inline_decode(xdr, 8);
3983                 if (unlikely(!p))
3984                         goto out_overflow;
3985                 xdr_decode_hyper(p, res);
3986                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3987         }
3988         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3989         return status;
3990 out_overflow:
3991         print_overflow_msg(__func__, xdr);
3992         return -EIO;
3993 }
3994
3995 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3996 {
3997         __be32 *p;
3998         int status = 0;
3999
4000         *res = 0;
4001         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4002                 return -EIO;
4003         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4004                 p = xdr_inline_decode(xdr, 8);
4005                 if (unlikely(!p))
4006                         goto out_overflow;
4007                 xdr_decode_hyper(p, res);
4008                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4009         }
4010         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4011         return status;
4012 out_overflow:
4013         print_overflow_msg(__func__, xdr);
4014         return -EIO;
4015 }
4016
4017 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4018 {
4019         __be32 *p;
4020         int ret = 0;
4021
4022         *used = 0;
4023         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4024                 return -EIO;
4025         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4026                 p = xdr_inline_decode(xdr, 8);
4027                 if (unlikely(!p))
4028                         goto out_overflow;
4029                 xdr_decode_hyper(p, used);
4030                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4031                 ret = NFS_ATTR_FATTR_SPACE_USED;
4032         }
4033         dprintk("%s: space used=%Lu\n", __func__,
4034                         (unsigned long long)*used);
4035         return ret;
4036 out_overflow:
4037         print_overflow_msg(__func__, xdr);
4038         return -EIO;
4039 }
4040
4041 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4042 {
4043         __be32 *p;
4044         uint64_t sec;
4045         uint32_t nsec;
4046
4047         p = xdr_inline_decode(xdr, 12);
4048         if (unlikely(!p))
4049                 goto out_overflow;
4050         p = xdr_decode_hyper(p, &sec);
4051         nsec = be32_to_cpup(p);
4052         time->tv_sec = (time_t)sec;
4053         time->tv_nsec = (long)nsec;
4054         return 0;
4055 out_overflow:
4056         print_overflow_msg(__func__, xdr);
4057         return -EIO;
4058 }
4059
4060 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4061 {
4062         int status = 0;
4063
4064         time->tv_sec = 0;
4065         time->tv_nsec = 0;
4066         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4067                 return -EIO;
4068         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4069                 status = decode_attr_time(xdr, time);
4070                 if (status == 0)
4071                         status = NFS_ATTR_FATTR_ATIME;
4072                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4073         }
4074         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4075         return status;
4076 }
4077
4078 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4079 {
4080         int status = 0;
4081
4082         time->tv_sec = 0;
4083         time->tv_nsec = 0;
4084         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4085                 return -EIO;
4086         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4087                 status = decode_attr_time(xdr, time);
4088                 if (status == 0)
4089                         status = NFS_ATTR_FATTR_CTIME;
4090                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4091         }
4092         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4093         return status;
4094 }
4095
4096 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4097                                   struct timespec *time)
4098 {
4099         int status = 0;
4100
4101         time->tv_sec = 0;
4102         time->tv_nsec = 0;
4103         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4104                 return -EIO;
4105         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4106                 status = decode_attr_time(xdr, time);
4107                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4108         }
4109         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4110                 (long)time->tv_nsec);
4111         return status;
4112 }
4113
4114 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4115                                         struct nfs4_label *label)
4116 {
4117         uint32_t pi = 0;
4118         uint32_t lfs = 0;
4119         __u32 len;
4120         __be32 *p;
4121         int status = 0;
4122
4123         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4124                 return -EIO;
4125         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4126                 p = xdr_inline_decode(xdr, 4);
4127                 if (unlikely(!p))
4128                         goto out_overflow;
4129                 lfs = be32_to_cpup(p++);
4130                 p = xdr_inline_decode(xdr, 4);
4131                 if (unlikely(!p))
4132                         goto out_overflow;
4133                 pi = be32_to_cpup(p++);
4134                 p = xdr_inline_decode(xdr, 4);
4135                 if (unlikely(!p))
4136                         goto out_overflow;
4137                 len = be32_to_cpup(p++);
4138                 p = xdr_inline_decode(xdr, len);
4139                 if (unlikely(!p))
4140                         goto out_overflow;
4141                 if (len < NFS4_MAXLABELLEN) {
4142                         if (label) {
4143                                 memcpy(label->label, p, len);
4144                                 label->len = len;
4145                                 label->pi = pi;
4146                                 label->lfs = lfs;
4147                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4148                         }
4149                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4150                 } else
4151                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4152                                         __func__, len);
4153         }
4154         if (label && label->label)
4155                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4156                         (char *)label->label, label->len, label->pi, label->lfs);
4157         return status;
4158
4159 out_overflow:
4160         print_overflow_msg(__func__, xdr);
4161         return -EIO;
4162 }
4163
4164 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4165 {
4166         int status = 0;
4167
4168         time->tv_sec = 0;
4169         time->tv_nsec = 0;
4170         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4171                 return -EIO;
4172         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4173                 status = decode_attr_time(xdr, time);
4174                 if (status == 0)
4175                         status = NFS_ATTR_FATTR_MTIME;
4176                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4177         }
4178         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4179         return status;
4180 }
4181
4182 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4183 {
4184         unsigned int attrwords = XDR_QUADLEN(attrlen);
4185         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4186
4187         if (unlikely(attrwords != nwords)) {
4188                 dprintk("%s: server returned incorrect attribute length: "
4189                         "%u %c %u\n",
4190                                 __func__,
4191                                 attrwords << 2,
4192                                 (attrwords < nwords) ? '<' : '>',
4193                                 nwords << 2);
4194                 return -EIO;
4195         }
4196         return 0;
4197 }
4198
4199 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4200 {
4201         __be32 *p;
4202
4203         p = xdr_inline_decode(xdr, 20);
4204         if (unlikely(!p))
4205                 goto out_overflow;
4206         cinfo->atomic = be32_to_cpup(p++);
4207         p = xdr_decode_hyper(p, &cinfo->before);
4208         xdr_decode_hyper(p, &cinfo->after);
4209         return 0;
4210 out_overflow:
4211         print_overflow_msg(__func__, xdr);
4212         return -EIO;
4213 }
4214
4215 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4216 {
4217         __be32 *p;
4218         uint32_t supp, acc;
4219         int status;
4220
4221         status = decode_op_hdr(xdr, OP_ACCESS);
4222         if (status)
4223                 return status;
4224         p = xdr_inline_decode(xdr, 8);
4225         if (unlikely(!p))
4226                 goto out_overflow;
4227         supp = be32_to_cpup(p++);
4228         acc = be32_to_cpup(p);
4229         *supported = supp;
4230         *access = acc;
4231         return 0;
4232 out_overflow:
4233         print_overflow_msg(__func__, xdr);
4234         return -EIO;
4235 }
4236
4237 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4238 {
4239         __be32 *p;
4240
4241         p = xdr_inline_decode(xdr, len);
4242         if (likely(p)) {
4243                 memcpy(buf, p, len);
4244                 return 0;
4245         }
4246         print_overflow_msg(__func__, xdr);
4247         return -EIO;
4248 }
4249
4250 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4251 {
4252         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4253 }
4254
4255 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4256 {
4257         int status;
4258
4259         status = decode_op_hdr(xdr, OP_CLOSE);
4260         if (status != -EIO)
4261                 nfs_increment_open_seqid(status, res->seqid);
4262         if (!status)
4263                 status = decode_stateid(xdr, &res->stateid);
4264         return status;
4265 }
4266
4267 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4268 {
4269         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4270 }
4271
4272 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4273 {
4274         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4275 }
4276
4277 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4278 {
4279         int status;
4280
4281         status = decode_op_hdr(xdr, OP_COMMIT);
4282         if (!status)
4283                 status = decode_write_verifier(xdr, &res->verf->verifier);
4284         return status;
4285 }
4286
4287 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4288 {
4289         __be32 *p;
4290         uint32_t bmlen;
4291         int status;
4292
4293         status = decode_op_hdr(xdr, OP_CREATE);
4294         if (status)
4295                 return status;
4296         if ((status = decode_change_info(xdr, cinfo)))
4297                 return status;
4298         p = xdr_inline_decode(xdr, 4);
4299         if (unlikely(!p))
4300                 goto out_overflow;
4301         bmlen = be32_to_cpup(p);
4302         p = xdr_inline_decode(xdr, bmlen << 2);
4303         if (likely(p))
4304                 return 0;
4305 out_overflow:
4306         print_overflow_msg(__func__, xdr);
4307         return -EIO;
4308 }
4309
4310 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4311 {
4312         unsigned int savep;
4313         uint32_t attrlen, bitmap[3] = {0};
4314         int status;
4315
4316         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4317                 goto xdr_error;
4318         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4319                 goto xdr_error;
4320         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4321                 goto xdr_error;
4322         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4323                 goto xdr_error;
4324         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4325                                                  &res->fh_expire_type)) != 0)
4326                 goto xdr_error;
4327         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4328                 goto xdr_error;
4329         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4330                 goto xdr_error;
4331         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4332                 goto xdr_error;
4333         status = verify_attr_len(xdr, savep, attrlen);
4334 xdr_error:
4335         dprintk("%s: xdr returned %d!\n", __func__, -status);
4336         return status;
4337 }
4338
4339 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4340 {
4341         unsigned int savep;
4342         uint32_t attrlen, bitmap[3] = {0};
4343         int status;
4344
4345         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4346                 goto xdr_error;
4347         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4348                 goto xdr_error;
4349         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4350                 goto xdr_error;
4351
4352         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4355                 goto xdr_error;
4356         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4361                 goto xdr_error;
4362         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4363                 goto xdr_error;
4364
4365         status = verify_attr_len(xdr, savep, attrlen);
4366 xdr_error:
4367         dprintk("%s: xdr returned %d!\n", __func__, -status);
4368         return status;
4369 }
4370
4371 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4372 {
4373         unsigned int savep;
4374         uint32_t attrlen, bitmap[3] = {0};
4375         int status;
4376
4377         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4378                 goto xdr_error;
4379         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4380                 goto xdr_error;
4381         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4382                 goto xdr_error;
4383
4384         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4387                 goto xdr_error;
4388
4389         status = verify_attr_len(xdr, savep, attrlen);
4390 xdr_error:
4391         dprintk("%s: xdr returned %d!\n", __func__, -status);
4392         return status;
4393 }
4394
4395 static int decode_threshold_hint(struct xdr_stream *xdr,
4396                                   uint32_t *bitmap,
4397                                   uint64_t *res,
4398                                   uint32_t hint_bit)
4399 {
4400         __be32 *p;
4401
4402         *res = 0;
4403         if (likely(bitmap[0] & hint_bit)) {
4404                 p = xdr_inline_decode(xdr, 8);
4405                 if (unlikely(!p))
4406                         goto out_overflow;
4407                 xdr_decode_hyper(p, res);
4408         }
4409         return 0;
4410 out_overflow:
4411         print_overflow_msg(__func__, xdr);
4412         return -EIO;
4413 }
4414
4415 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4416                                         struct nfs4_threshold *res)
4417 {
4418         __be32 *p;
4419         unsigned int savep;
4420         uint32_t bitmap[3] = {0,}, attrlen;
4421         int status;
4422
4423         /* layout type */
4424         p = xdr_inline_decode(xdr, 4);
4425         if (unlikely(!p)) {
4426                 print_overflow_msg(__func__, xdr);
4427                 return -EIO;
4428         }
4429         res->l_type = be32_to_cpup(p);
4430
4431         /* thi_hintset bitmap */
4432         status = decode_attr_bitmap(xdr, bitmap);
4433         if (status < 0)
4434                 goto xdr_error;
4435
4436         /* thi_hintlist length */
4437         status = decode_attr_length(xdr, &attrlen, &savep);
4438         if (status < 0)
4439                 goto xdr_error;
4440         /* thi_hintlist */
4441         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4442         if (status < 0)
4443                 goto xdr_error;
4444         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4445         if (status < 0)
4446                 goto xdr_error;
4447         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4448                                        THRESHOLD_RD_IO);
4449         if (status < 0)
4450                 goto xdr_error;
4451         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4452                                        THRESHOLD_WR_IO);
4453         if (status < 0)
4454                 goto xdr_error;
4455
4456         status = verify_attr_len(xdr, savep, attrlen);
4457         res->bm = bitmap[0];
4458
4459         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4460                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4461                 res->wr_io_sz);
4462 xdr_error:
4463         dprintk("%s ret=%d!\n", __func__, status);
4464         return status;
4465 }
4466
4467 /*
4468  * Thresholds on pNFS direct I/O vrs MDS I/O
4469  */
4470 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4471                                     uint32_t *bitmap,
4472                                     struct nfs4_threshold *res)
4473 {
4474         __be32 *p;
4475         int status = 0;
4476         uint32_t num;
4477
4478         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4479                 return -EIO;
4480         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4481                 /* Did the server return an unrequested attribute? */
4482                 if (unlikely(res == NULL))
4483                         return -EREMOTEIO;
4484                 p = xdr_inline_decode(xdr, 4);
4485                 if (unlikely(!p))
4486                         goto out_overflow;
4487                 num = be32_to_cpup(p);
4488                 if (num == 0)
4489                         return 0;
4490                 if (num > 1)
4491                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4492                                 "drivers per filesystem not supported\n",
4493                                 __func__);
4494
4495                 status = decode_first_threshold_item4(xdr, res);
4496                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4497         }
4498         return status;
4499 out_overflow:
4500         print_overflow_msg(__func__, xdr);
4501         return -EIO;
4502 }
4503
4504 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4505                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4506                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4507                 const struct nfs_server *server)
4508 {
4509         int status;
4510         umode_t fmode = 0;
4511         uint32_t type;
4512         int32_t err;
4513
4514         status = decode_attr_type(xdr, bitmap, &type);
4515         if (status < 0)
4516                 goto xdr_error;
4517         fattr->mode = 0;
4518         if (status != 0) {
4519                 fattr->mode |= nfs_type2fmt[type];
4520                 fattr->valid |= status;
4521         }
4522
4523         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4524         if (status < 0)
4525                 goto xdr_error;
4526         fattr->valid |= status;
4527
4528         status = decode_attr_size(xdr, bitmap, &fattr->size);
4529         if (status < 0)
4530                 goto xdr_error;
4531         fattr->valid |= status;
4532
4533         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4534         if (status < 0)
4535                 goto xdr_error;
4536         fattr->valid |= status;
4537
4538         err = 0;
4539         status = decode_attr_error(xdr, bitmap, &err);
4540         if (status < 0)
4541                 goto xdr_error;
4542
4543         status = decode_attr_filehandle(xdr, bitmap, fh);
4544         if (status < 0)
4545                 goto xdr_error;
4546
4547         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4548         if (status < 0)
4549                 goto xdr_error;
4550         fattr->valid |= status;
4551
4552         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4553         if (status < 0)
4554                 goto xdr_error;
4555         fattr->valid |= status;
4556
4557         status = decode_attr_mode(xdr, bitmap, &fmode);
4558         if (status < 0)
4559                 goto xdr_error;
4560         if (status != 0) {
4561                 fattr->mode |= fmode;
4562                 fattr->valid |= status;
4563         }
4564
4565         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4566         if (status < 0)
4567                 goto xdr_error;
4568         fattr->valid |= status;
4569
4570         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4571         if (status < 0)
4572                 goto xdr_error;
4573         fattr->valid |= status;
4574
4575         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4576         if (status < 0)
4577                 goto xdr_error;
4578         fattr->valid |= status;
4579
4580         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4581         if (status < 0)
4582                 goto xdr_error;
4583         fattr->valid |= status;
4584
4585         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4586         if (status < 0)
4587                 goto xdr_error;
4588         fattr->valid |= status;
4589
4590         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4591         if (status < 0)
4592                 goto xdr_error;
4593         fattr->valid |= status;
4594
4595         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4596         if (status < 0)
4597                 goto xdr_error;
4598         fattr->valid |= status;
4599
4600         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4601         if (status < 0)
4602                 goto xdr_error;
4603         fattr->valid |= status;
4604
4605         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4606         if (status < 0)
4607                 goto xdr_error;
4608         fattr->valid |= status;
4609
4610         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4611         if (status < 0)
4612                 goto xdr_error;
4613
4614         if (label) {
4615                 status = decode_attr_security_label(xdr, bitmap, label);
4616                 if (status < 0)
4617                         goto xdr_error;
4618                 fattr->valid |= status;
4619         }
4620
4621 xdr_error:
4622         dprintk("%s: xdr returned %d\n", __func__, -status);
4623         return status;
4624 }
4625
4626 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4627                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4628                 struct nfs4_label *label, const struct nfs_server *server)
4629 {
4630         unsigned int savep;
4631         uint32_t attrlen,
4632                  bitmap[3] = {0};
4633         int status;
4634
4635         status = decode_op_hdr(xdr, OP_GETATTR);
4636         if (status < 0)
4637                 goto xdr_error;
4638
4639         status = decode_attr_bitmap(xdr, bitmap);
4640         if (status < 0)
4641                 goto xdr_error;
4642
4643         status = decode_attr_length(xdr, &attrlen, &savep);
4644         if (status < 0)
4645                 goto xdr_error;
4646
4647         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4648                                         label, server);
4649         if (status < 0)
4650                 goto xdr_error;
4651
4652         status = verify_attr_len(xdr, savep, attrlen);
4653 xdr_error:
4654         dprintk("%s: xdr returned %d\n", __func__, -status);
4655         return status;
4656 }
4657
4658 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4659                 struct nfs4_label *label, const struct nfs_server *server)
4660 {
4661         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4662 }
4663
4664 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4665                 const struct nfs_server *server)
4666 {
4667         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4668 }
4669
4670 /*
4671  * Decode potentially multiple layout types. Currently we only support
4672  * one layout driver per file system.
4673  */
4674 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4675                                          uint32_t *layouttype)
4676 {
4677         __be32 *p;
4678         int num;
4679
4680         p = xdr_inline_decode(xdr, 4);
4681         if (unlikely(!p))
4682                 goto out_overflow;
4683         num = be32_to_cpup(p);
4684
4685         /* pNFS is not supported by the underlying file system */
4686         if (num == 0) {
4687                 *layouttype = 0;
4688                 return 0;
4689         }
4690         if (num > 1)
4691                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4692                         "drivers per filesystem not supported\n", __func__);
4693
4694         /* Decode and set first layout type, move xdr->p past unused types */
4695         p = xdr_inline_decode(xdr, num * 4);
4696         if (unlikely(!p))
4697                 goto out_overflow;
4698         *layouttype = be32_to_cpup(p);
4699         return 0;
4700 out_overflow:
4701         print_overflow_msg(__func__, xdr);
4702         return -EIO;
4703 }
4704
4705 /*
4706  * The type of file system exported.
4707  * Note we must ensure that layouttype is set in any non-error case.
4708  */
4709 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4710                                 uint32_t *layouttype)
4711 {
4712         int status = 0;
4713
4714         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4715         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4716                 return -EIO;
4717         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4718                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4719                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4720         } else
4721                 *layouttype = 0;
4722         return status;
4723 }
4724
4725 /*
4726  * The prefered block size for layout directed io
4727  */
4728 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4729                                       uint32_t *res)
4730 {
4731         __be32 *p;
4732
4733         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4734         *res = 0;
4735         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4736                 p = xdr_inline_decode(xdr, 4);
4737                 if (unlikely(!p)) {
4738                         print_overflow_msg(__func__, xdr);
4739                         return -EIO;
4740                 }
4741                 *res = be32_to_cpup(p);
4742                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4743         }
4744         return 0;
4745 }
4746
4747 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4748 {
4749         unsigned int savep;
4750         uint32_t attrlen, bitmap[3];
4751         int status;
4752
4753         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4754                 goto xdr_error;
4755         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4756                 goto xdr_error;
4757         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4758                 goto xdr_error;
4759
4760         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4761
4762         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4763                 goto xdr_error;
4764         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4765                 goto xdr_error;
4766         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4767                 goto xdr_error;
4768         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4769         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4770                 goto xdr_error;
4771         fsinfo->wtpref = fsinfo->wtmax;
4772         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4773         if (status != 0)
4774                 goto xdr_error;
4775         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4776         if (status != 0)
4777                 goto xdr_error;
4778         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4779         if (status)
4780                 goto xdr_error;
4781
4782         status = verify_attr_len(xdr, savep, attrlen);
4783 xdr_error:
4784         dprintk("%s: xdr returned %d!\n", __func__, -status);
4785         return status;
4786 }
4787
4788 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4789 {
4790         __be32 *p;
4791         uint32_t len;
4792         int status;
4793
4794         /* Zero handle first to allow comparisons */
4795         memset(fh, 0, sizeof(*fh));
4796
4797         status = decode_op_hdr(xdr, OP_GETFH);
4798         if (status)
4799                 return status;
4800
4801         p = xdr_inline_decode(xdr, 4);
4802         if (unlikely(!p))
4803                 goto out_overflow;
4804         len = be32_to_cpup(p);
4805         if (len > NFS4_FHSIZE)
4806                 return -EIO;
4807         fh->size = len;
4808         p = xdr_inline_decode(xdr, len);
4809         if (unlikely(!p))
4810                 goto out_overflow;
4811         memcpy(fh->data, p, len);
4812         return 0;
4813 out_overflow:
4814         print_overflow_msg(__func__, xdr);
4815         return -EIO;
4816 }
4817
4818 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4819 {
4820         int status;
4821
4822         status = decode_op_hdr(xdr, OP_LINK);
4823         if (status)
4824                 return status;
4825         return decode_change_info(xdr, cinfo);
4826 }
4827
4828 /*
4829  * We create the owner, so we know a proper owner.id length is 4.
4830  */
4831 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4832 {
4833         uint64_t offset, length, clientid;
4834         __be32 *p;
4835         uint32_t namelen, type;
4836
4837         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4838         if (unlikely(!p))
4839                 goto out_overflow;
4840         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4841         p = xdr_decode_hyper(p, &length);
4842         type = be32_to_cpup(p++); /* 4 byte read */
4843         if (fl != NULL) { /* manipulate file lock */
4844                 fl->fl_start = (loff_t)offset;
4845                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4846                 if (length == ~(uint64_t)0)
4847                         fl->fl_end = OFFSET_MAX;
4848                 fl->fl_type = F_WRLCK;
4849                 if (type & 1)
4850                         fl->fl_type = F_RDLCK;
4851                 fl->fl_pid = 0;
4852         }
4853         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4854         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4855         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4856         if (likely(p))
4857                 return -NFS4ERR_DENIED;
4858 out_overflow:
4859         print_overflow_msg(__func__, xdr);
4860         return -EIO;
4861 }
4862
4863 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4864 {
4865         int status;
4866
4867         status = decode_op_hdr(xdr, OP_LOCK);
4868         if (status == -EIO)
4869                 goto out;
4870         if (status == 0) {
4871                 status = decode_stateid(xdr, &res->stateid);
4872                 if (unlikely(status))
4873                         goto out;
4874         } else if (status == -NFS4ERR_DENIED)
4875                 status = decode_lock_denied(xdr, NULL);
4876         if (res->open_seqid != NULL)
4877                 nfs_increment_open_seqid(status, res->open_seqid);
4878         nfs_increment_lock_seqid(status, res->lock_seqid);
4879 out:
4880         return status;
4881 }
4882
4883 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4884 {
4885         int status;
4886         status = decode_op_hdr(xdr, OP_LOCKT);
4887         if (status == -NFS4ERR_DENIED)
4888                 return decode_lock_denied(xdr, res->denied);
4889         return status;
4890 }
4891
4892 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4893 {
4894         int status;
4895
4896         status = decode_op_hdr(xdr, OP_LOCKU);
4897         if (status != -EIO)
4898                 nfs_increment_lock_seqid(status, res->seqid);
4899         if (status == 0)
4900                 status = decode_stateid(xdr, &res->stateid);
4901         return status;
4902 }
4903
4904 static int decode_release_lockowner(struct xdr_stream *xdr)
4905 {
4906         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4907 }
4908
4909 static int decode_lookup(struct xdr_stream *xdr)
4910 {
4911         return decode_op_hdr(xdr, OP_LOOKUP);
4912 }
4913
4914 /* This is too sick! */
4915 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4916 {
4917         __be32 *p;
4918         uint32_t limit_type, nblocks, blocksize;
4919
4920         p = xdr_inline_decode(xdr, 12);
4921         if (unlikely(!p))
4922                 goto out_overflow;
4923         limit_type = be32_to_cpup(p++);
4924         switch (limit_type) {
4925         case 1:
4926                 xdr_decode_hyper(p, maxsize);
4927                 break;
4928         case 2:
4929                 nblocks = be32_to_cpup(p++);
4930                 blocksize = be32_to_cpup(p);
4931                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4932         }
4933         return 0;
4934 out_overflow:
4935         print_overflow_msg(__func__, xdr);
4936         return -EIO;
4937 }
4938
4939 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4940 {
4941         __be32 *p;
4942         uint32_t delegation_type;
4943         int status;
4944
4945         p = xdr_inline_decode(xdr, 4);
4946         if (unlikely(!p))
4947                 goto out_overflow;
4948         delegation_type = be32_to_cpup(p);
4949         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4950                 res->delegation_type = 0;
4951                 return 0;
4952         }
4953         status = decode_stateid(xdr, &res->delegation);
4954         if (unlikely(status))
4955                 return status;
4956         p = xdr_inline_decode(xdr, 4);
4957         if (unlikely(!p))
4958                 goto out_overflow;
4959         res->do_recall = be32_to_cpup(p);
4960
4961         switch (delegation_type) {
4962         case NFS4_OPEN_DELEGATE_READ:
4963                 res->delegation_type = FMODE_READ;
4964                 break;
4965         case NFS4_OPEN_DELEGATE_WRITE:
4966                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4967                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4968                                 return -EIO;
4969         }
4970         return decode_ace(xdr, NULL, res->server->nfs_client);
4971 out_overflow:
4972         print_overflow_msg(__func__, xdr);
4973         return -EIO;
4974 }
4975
4976 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4977 {
4978         __be32 *p;
4979         uint32_t savewords, bmlen, i;
4980         int status;
4981
4982         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4983                 return status;
4984         nfs_increment_open_seqid(status, res->seqid);
4985         if (status)
4986                 return status;
4987         status = decode_stateid(xdr, &res->stateid);
4988         if (unlikely(status))
4989                 return status;
4990
4991         decode_change_info(xdr, &res->cinfo);
4992
4993         p = xdr_inline_decode(xdr, 8);
4994         if (unlikely(!p))
4995                 goto out_overflow;
4996         res->rflags = be32_to_cpup(p++);
4997         bmlen = be32_to_cpup(p);
4998         if (bmlen > 10)
4999                 goto xdr_error;
5000
5001         p = xdr_inline_decode(xdr, bmlen << 2);
5002         if (unlikely(!p))
5003                 goto out_overflow;
5004         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5005         for (i = 0; i < savewords; ++i)
5006                 res->attrset[i] = be32_to_cpup(p++);
5007         for (; i < NFS4_BITMAP_SIZE; i++)
5008                 res->attrset[i] = 0;
5009
5010         return decode_delegation(xdr, res);
5011 xdr_error:
5012         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5013         return -EIO;
5014 out_overflow:
5015         print_overflow_msg(__func__, xdr);
5016         return -EIO;
5017 }
5018
5019 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5020 {
5021         int status;
5022
5023         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5024         if (status != -EIO)
5025                 nfs_increment_open_seqid(status, res->seqid);
5026         if (!status)
5027                 status = decode_stateid(xdr, &res->stateid);
5028         return status;
5029 }
5030
5031 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5032 {
5033         int status;
5034
5035         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5036         if (status != -EIO)
5037                 nfs_increment_open_seqid(status, res->seqid);
5038         if (!status)
5039                 status = decode_stateid(xdr, &res->stateid);
5040         return status;
5041 }
5042
5043 static int decode_putfh(struct xdr_stream *xdr)
5044 {
5045         return decode_op_hdr(xdr, OP_PUTFH);
5046 }
5047
5048 static int decode_putrootfh(struct xdr_stream *xdr)
5049 {
5050         return decode_op_hdr(xdr, OP_PUTROOTFH);
5051 }
5052
5053 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5054                        struct nfs_pgio_res *res)
5055 {
5056         __be32 *p;
5057         uint32_t count, eof, recvd;
5058         int status;
5059
5060         status = decode_op_hdr(xdr, OP_READ);
5061         if (status)
5062                 return status;
5063         p = xdr_inline_decode(xdr, 8);
5064         if (unlikely(!p))
5065                 goto out_overflow;
5066         eof = be32_to_cpup(p++);
5067         count = be32_to_cpup(p);
5068         recvd = xdr_read_pages(xdr, count);
5069         if (count > recvd) {
5070                 dprintk("NFS: server cheating in read reply: "
5071                                 "count %u > recvd %u\n", count, recvd);
5072                 count = recvd;
5073                 eof = 0;
5074         }
5075         res->eof = eof;
5076         res->count = count;
5077         return 0;
5078 out_overflow:
5079         print_overflow_msg(__func__, xdr);
5080         return -EIO;
5081 }
5082
5083 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5084 {
5085         int             status;
5086         __be32          verf[2];
5087
5088         status = decode_op_hdr(xdr, OP_READDIR);
5089         if (!status)
5090                 status = decode_verifier(xdr, readdir->verifier.data);
5091         if (unlikely(status))
5092                 return status;
5093         memcpy(verf, readdir->verifier.data, sizeof(verf));
5094         dprintk("%s: verifier = %08x:%08x\n",
5095                         __func__, verf[0], verf[1]);
5096         return xdr_read_pages(xdr, xdr->buf->page_len);
5097 }
5098
5099 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5100 {
5101         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5102         u32 len, recvd;
5103         __be32 *p;
5104         int status;
5105
5106         status = decode_op_hdr(xdr, OP_READLINK);
5107         if (status)
5108                 return status;
5109
5110         /* Convert length of symlink */
5111         p = xdr_inline_decode(xdr, 4);
5112         if (unlikely(!p))
5113                 goto out_overflow;
5114         len = be32_to_cpup(p);
5115         if (len >= rcvbuf->page_len || len <= 0) {
5116                 dprintk("nfs: server returned giant symlink!\n");
5117                 return -ENAMETOOLONG;
5118         }
5119         recvd = xdr_read_pages(xdr, len);
5120         if (recvd < len) {
5121                 dprintk("NFS: server cheating in readlink reply: "
5122                                 "count %u > recvd %u\n", len, recvd);
5123                 return -EIO;
5124         }
5125         /*
5126          * The XDR encode routine has set things up so that
5127          * the link text will be copied directly into the
5128          * buffer.  We just have to do overflow-checking,
5129          * and and null-terminate the text (the VFS expects
5130          * null-termination).
5131          */
5132         xdr_terminate_string(rcvbuf, len);
5133         return 0;
5134 out_overflow:
5135         print_overflow_msg(__func__, xdr);
5136         return -EIO;
5137 }
5138
5139 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5140 {
5141         int status;
5142
5143         status = decode_op_hdr(xdr, OP_REMOVE);
5144         if (status)
5145                 goto out;
5146         status = decode_change_info(xdr, cinfo);
5147 out:
5148         return status;
5149 }
5150
5151 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5152               struct nfs4_change_info *new_cinfo)
5153 {
5154         int status;
5155
5156         status = decode_op_hdr(xdr, OP_RENAME);
5157         if (status)
5158                 goto out;
5159         if ((status = decode_change_info(xdr, old_cinfo)))
5160                 goto out;
5161         status = decode_change_info(xdr, new_cinfo);
5162 out:
5163         return status;
5164 }
5165
5166 static int decode_renew(struct xdr_stream *xdr)
5167 {
5168         return decode_op_hdr(xdr, OP_RENEW);
5169 }
5170
5171 static int
5172 decode_restorefh(struct xdr_stream *xdr)
5173 {
5174         return decode_op_hdr(xdr, OP_RESTOREFH);
5175 }
5176
5177 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5178                          struct nfs_getaclres *res)
5179 {
5180         unsigned int savep;
5181         uint32_t attrlen,
5182                  bitmap[3] = {0};
5183         int status;
5184         unsigned int pg_offset;
5185
5186         res->acl_len = 0;
5187         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5188                 goto out;
5189
5190         xdr_enter_page(xdr, xdr->buf->page_len);
5191
5192         /* Calculate the offset of the page data */
5193         pg_offset = xdr->buf->head[0].iov_len;
5194
5195         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5196                 goto out;
5197         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5198                 goto out;
5199
5200         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5201                 return -EIO;
5202         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5203
5204                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5205                  * are stored with the acl data to handle the problem of
5206                  * variable length bitmaps.*/
5207                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5208                 res->acl_len = attrlen;
5209
5210                 /* Check for receive buffer overflow */
5211                 if (res->acl_len > (xdr->nwords << 2) ||
5212                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5213                         res->acl_flags |= NFS4_ACL_TRUNC;
5214                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5215                                         attrlen, xdr->nwords << 2);
5216                 }
5217         } else
5218                 status = -EOPNOTSUPP;
5219
5220 out:
5221         return status;
5222 }
5223
5224 static int
5225 decode_savefh(struct xdr_stream *xdr)
5226 {
5227         return decode_op_hdr(xdr, OP_SAVEFH);
5228 }
5229
5230 static int decode_setattr(struct xdr_stream *xdr)
5231 {
5232         __be32 *p;
5233         uint32_t bmlen;
5234         int status;
5235
5236         status = decode_op_hdr(xdr, OP_SETATTR);
5237         if (status)
5238                 return status;
5239         p = xdr_inline_decode(xdr, 4);
5240         if (unlikely(!p))
5241                 goto out_overflow;
5242         bmlen = be32_to_cpup(p);
5243         p = xdr_inline_decode(xdr, bmlen << 2);
5244         if (likely(p))
5245                 return 0;
5246 out_overflow:
5247         print_overflow_msg(__func__, xdr);
5248         return -EIO;
5249 }
5250
5251 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5252 {
5253         __be32 *p;
5254         uint32_t opnum;
5255         int32_t nfserr;
5256
5257         p = xdr_inline_decode(xdr, 8);
5258         if (unlikely(!p))
5259                 goto out_overflow;
5260         opnum = be32_to_cpup(p++);
5261         if (opnum != OP_SETCLIENTID) {
5262                 dprintk("nfs: decode_setclientid: Server returned operation"
5263                         " %d\n", opnum);
5264                 return -EIO;
5265         }
5266         nfserr = be32_to_cpup(p);
5267         if (nfserr == NFS_OK) {
5268                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5269                 if (unlikely(!p))
5270                         goto out_overflow;
5271                 p = xdr_decode_hyper(p, &res->clientid);
5272                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5273         } else if (nfserr == NFSERR_CLID_INUSE) {
5274                 uint32_t len;
5275
5276                 /* skip netid string */
5277                 p = xdr_inline_decode(xdr, 4);
5278                 if (unlikely(!p))
5279                         goto out_overflow;
5280                 len = be32_to_cpup(p);
5281                 p = xdr_inline_decode(xdr, len);
5282                 if (unlikely(!p))
5283                         goto out_overflow;
5284
5285                 /* skip uaddr string */
5286                 p = xdr_inline_decode(xdr, 4);
5287                 if (unlikely(!p))
5288                         goto out_overflow;
5289                 len = be32_to_cpup(p);
5290                 p = xdr_inline_decode(xdr, len);
5291                 if (unlikely(!p))
5292                         goto out_overflow;
5293                 return -NFSERR_CLID_INUSE;
5294         } else
5295                 return nfs4_stat_to_errno(nfserr);
5296
5297         return 0;
5298 out_overflow:
5299         print_overflow_msg(__func__, xdr);
5300         return -EIO;
5301 }
5302
5303 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5304 {
5305         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5306 }
5307
5308 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5309 {
5310         __be32 *p;
5311         int status;
5312
5313         status = decode_op_hdr(xdr, OP_WRITE);
5314         if (status)
5315                 return status;
5316
5317         p = xdr_inline_decode(xdr, 8);
5318         if (unlikely(!p))
5319                 goto out_overflow;
5320         res->count = be32_to_cpup(p++);
5321         res->verf->committed = be32_to_cpup(p++);
5322         return decode_write_verifier(xdr, &res->verf->verifier);
5323 out_overflow:
5324         print_overflow_msg(__func__, xdr);
5325         return -EIO;
5326 }
5327
5328 static int decode_delegreturn(struct xdr_stream *xdr)
5329 {
5330         return decode_op_hdr(xdr, OP_DELEGRETURN);
5331 }
5332
5333 static int decode_secinfo_gss(struct xdr_stream *xdr,
5334                               struct nfs4_secinfo4 *flavor)
5335 {
5336         u32 oid_len;
5337         __be32 *p;
5338
5339         p = xdr_inline_decode(xdr, 4);
5340         if (unlikely(!p))
5341                 goto out_overflow;
5342         oid_len = be32_to_cpup(p);
5343         if (oid_len > GSS_OID_MAX_LEN)
5344                 goto out_err;
5345
5346         p = xdr_inline_decode(xdr, oid_len);
5347         if (unlikely(!p))
5348                 goto out_overflow;
5349         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5350         flavor->flavor_info.oid.len = oid_len;
5351
5352         p = xdr_inline_decode(xdr, 8);
5353         if (unlikely(!p))
5354                 goto out_overflow;
5355         flavor->flavor_info.qop = be32_to_cpup(p++);
5356         flavor->flavor_info.service = be32_to_cpup(p);
5357
5358         return 0;
5359
5360 out_overflow:
5361         print_overflow_msg(__func__, xdr);
5362         return -EIO;
5363 out_err:
5364         return -EINVAL;
5365 }
5366
5367 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5368 {
5369         struct nfs4_secinfo4 *sec_flavor;
5370         unsigned int i, num_flavors;
5371         int status;
5372         __be32 *p;
5373
5374         p = xdr_inline_decode(xdr, 4);
5375         if (unlikely(!p))
5376                 goto out_overflow;
5377
5378         res->flavors->num_flavors = 0;
5379         num_flavors = be32_to_cpup(p);
5380
5381         for (i = 0; i < num_flavors; i++) {
5382                 sec_flavor = &res->flavors->flavors[i];
5383                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5384                         break;
5385
5386                 p = xdr_inline_decode(xdr, 4);
5387                 if (unlikely(!p))
5388                         goto out_overflow;
5389                 sec_flavor->flavor = be32_to_cpup(p);
5390
5391                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5392                         status = decode_secinfo_gss(xdr, sec_flavor);
5393                         if (status)
5394                                 goto out;
5395                 }
5396                 res->flavors->num_flavors++;
5397         }
5398
5399         status = 0;
5400 out:
5401         return status;
5402 out_overflow:
5403         print_overflow_msg(__func__, xdr);
5404         return -EIO;
5405 }
5406
5407 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5408 {
5409         int status = decode_op_hdr(xdr, OP_SECINFO);
5410         if (status)
5411                 return status;
5412         return decode_secinfo_common(xdr, res);
5413 }
5414
5415 #if defined(CONFIG_NFS_V4_1)
5416 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5417 {
5418         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5419         if (status)
5420                 return status;
5421         return decode_secinfo_common(xdr, res);
5422 }
5423
5424 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5425 {
5426         __be32 *p;
5427         uint32_t bitmap_words;
5428         unsigned int i;
5429
5430         p = xdr_inline_decode(xdr, 4);
5431         bitmap_words = be32_to_cpup(p++);
5432         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5433                 return -EIO;
5434         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5435         for (i = 0; i < bitmap_words; i++)
5436                 op_map->u.words[i] = be32_to_cpup(p++);
5437
5438         return 0;
5439 }
5440
5441 static int decode_exchange_id(struct xdr_stream *xdr,
5442                               struct nfs41_exchange_id_res *res)
5443 {
5444         __be32 *p;
5445         uint32_t dummy;
5446         char *dummy_str;
5447         int status;
5448         uint32_t impl_id_count;
5449
5450         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5451         if (status)
5452                 return status;
5453
5454         p = xdr_inline_decode(xdr, 8);
5455         if (unlikely(!p))
5456                 goto out_overflow;
5457         xdr_decode_hyper(p, &res->clientid);
5458         p = xdr_inline_decode(xdr, 12);
5459         if (unlikely(!p))
5460                 goto out_overflow;
5461         res->seqid = be32_to_cpup(p++);
5462         res->flags = be32_to_cpup(p++);
5463
5464         res->state_protect.how = be32_to_cpup(p);
5465         switch (res->state_protect.how) {
5466         case SP4_NONE:
5467                 break;
5468         case SP4_MACH_CRED:
5469                 status = decode_op_map(xdr, &res->state_protect.enforce);
5470                 if (status)
5471                         return status;
5472                 status = decode_op_map(xdr, &res->state_protect.allow);
5473                 if (status)
5474                         return status;
5475                 break;
5476         default:
5477                 WARN_ON_ONCE(1);
5478                 return -EIO;
5479         }
5480
5481         /* server_owner4.so_minor_id */
5482         p = xdr_inline_decode(xdr, 8);
5483         if (unlikely(!p))
5484                 goto out_overflow;
5485         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5486
5487         /* server_owner4.so_major_id */
5488         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5489         if (unlikely(status))
5490                 return status;
5491         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5492                 return -EIO;
5493         memcpy(res->server_owner->major_id, dummy_str, dummy);
5494         res->server_owner->major_id_sz = dummy;
5495
5496         /* server_scope4 */
5497         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5498         if (unlikely(status))
5499                 return status;
5500         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5501                 return -EIO;
5502         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5503         res->server_scope->server_scope_sz = dummy;
5504
5505         /* Implementation Id */
5506         p = xdr_inline_decode(xdr, 4);
5507         if (unlikely(!p))
5508                 goto out_overflow;
5509         impl_id_count = be32_to_cpup(p++);
5510
5511         if (impl_id_count) {
5512                 /* nii_domain */
5513                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5514                 if (unlikely(status))
5515                         return status;
5516                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5517                         return -EIO;
5518                 memcpy(res->impl_id->domain, dummy_str, dummy);
5519
5520                 /* nii_name */
5521                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5522                 if (unlikely(status))
5523                         return status;
5524                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5525                         return -EIO;
5526                 memcpy(res->impl_id->name, dummy_str, dummy);
5527
5528                 /* nii_date */
5529                 p = xdr_inline_decode(xdr, 12);
5530                 if (unlikely(!p))
5531                         goto out_overflow;
5532                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5533                 res->impl_id->date.nseconds = be32_to_cpup(p);
5534
5535                 /* if there's more than one entry, ignore the rest */
5536         }
5537         return 0;
5538 out_overflow:
5539         print_overflow_msg(__func__, xdr);
5540         return -EIO;
5541 }
5542
5543 static int decode_chan_attrs(struct xdr_stream *xdr,
5544                              struct nfs4_channel_attrs *attrs)
5545 {
5546         __be32 *p;
5547         u32 nr_attrs, val;
5548
5549         p = xdr_inline_decode(xdr, 28);
5550         if (unlikely(!p))
5551                 goto out_overflow;
5552         val = be32_to_cpup(p++);        /* headerpadsz */
5553         if (val)
5554                 return -EINVAL;         /* no support for header padding yet */
5555         attrs->max_rqst_sz = be32_to_cpup(p++);
5556         attrs->max_resp_sz = be32_to_cpup(p++);
5557         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5558         attrs->max_ops = be32_to_cpup(p++);
5559         attrs->max_reqs = be32_to_cpup(p++);
5560         nr_attrs = be32_to_cpup(p);
5561         if (unlikely(nr_attrs > 1)) {
5562                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5563                         "count %u\n", __func__, nr_attrs);
5564                 return -EINVAL;
5565         }
5566         if (nr_attrs == 1) {
5567                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5568                 if (unlikely(!p))
5569                         goto out_overflow;
5570         }
5571         return 0;
5572 out_overflow:
5573         print_overflow_msg(__func__, xdr);
5574         return -EIO;
5575 }
5576
5577 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5578 {
5579         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5580 }
5581
5582 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5583                                 struct nfs41_bind_conn_to_session_res *res)
5584 {
5585         __be32 *p;
5586         int status;
5587
5588         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5589         if (!status)
5590                 status = decode_sessionid(xdr, &res->session->sess_id);
5591         if (unlikely(status))
5592                 return status;
5593
5594         /* dir flags, rdma mode bool */
5595         p = xdr_inline_decode(xdr, 8);
5596         if (unlikely(!p))
5597                 goto out_overflow;
5598
5599         res->dir = be32_to_cpup(p++);
5600         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5601                 return -EIO;
5602         if (be32_to_cpup(p) == 0)
5603                 res->use_conn_in_rdma_mode = false;
5604         else
5605                 res->use_conn_in_rdma_mode = true;
5606
5607         return 0;
5608 out_overflow:
5609         print_overflow_msg(__func__, xdr);
5610         return -EIO;
5611 }
5612
5613 static int decode_create_session(struct xdr_stream *xdr,
5614                                  struct nfs41_create_session_res *res)
5615 {
5616         __be32 *p;
5617         int status;
5618         struct nfs_client *clp = res->client;
5619         struct nfs4_session *session = clp->cl_session;
5620
5621         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5622         if (!status)
5623                 status = decode_sessionid(xdr, &session->sess_id);
5624         if (unlikely(status))
5625                 return status;
5626
5627         /* seqid, flags */
5628         p = xdr_inline_decode(xdr, 8);
5629         if (unlikely(!p))
5630                 goto out_overflow;
5631         clp->cl_seqid = be32_to_cpup(p++);
5632         session->flags = be32_to_cpup(p);
5633
5634         /* Channel attributes */
5635         status = decode_chan_attrs(xdr, &session->fc_attrs);
5636         if (!status)
5637                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5638         return status;
5639 out_overflow:
5640         print_overflow_msg(__func__, xdr);
5641         return -EIO;
5642 }
5643
5644 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5645 {
5646         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5647 }
5648
5649 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5650 {
5651         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5652 }
5653
5654 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5655 {
5656         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5657 }
5658 #endif /* CONFIG_NFS_V4_1 */
5659
5660 static int decode_sequence(struct xdr_stream *xdr,
5661                            struct nfs4_sequence_res *res,
5662                            struct rpc_rqst *rqstp)
5663 {
5664 #if defined(CONFIG_NFS_V4_1)
5665         struct nfs4_session *session;
5666         struct nfs4_sessionid id;
5667         u32 dummy;
5668         int status;
5669         __be32 *p;
5670
5671         if (res->sr_slot == NULL)
5672                 return 0;
5673         if (!res->sr_slot->table->session)
5674                 return 0;
5675
5676         status = decode_op_hdr(xdr, OP_SEQUENCE);
5677         if (!status)
5678                 status = decode_sessionid(xdr, &id);
5679         if (unlikely(status))
5680                 goto out_err;
5681
5682         /*
5683          * If the server returns different values for sessionID, slotID or
5684          * sequence number, the server is looney tunes.
5685          */
5686         status = -EREMOTEIO;
5687         session = res->sr_slot->table->session;
5688
5689         if (memcmp(id.data, session->sess_id.data,
5690                    NFS4_MAX_SESSIONID_LEN)) {
5691                 dprintk("%s Invalid session id\n", __func__);
5692                 goto out_err;
5693         }
5694
5695         p = xdr_inline_decode(xdr, 20);
5696         if (unlikely(!p))
5697                 goto out_overflow;
5698
5699         /* seqid */
5700         dummy = be32_to_cpup(p++);
5701         if (dummy != res->sr_slot->seq_nr) {
5702                 dprintk("%s Invalid sequence number\n", __func__);
5703                 goto out_err;
5704         }
5705         /* slot id */
5706         dummy = be32_to_cpup(p++);
5707         if (dummy != res->sr_slot->slot_nr) {
5708                 dprintk("%s Invalid slot id\n", __func__);
5709                 goto out_err;
5710         }
5711         /* highest slot id */
5712         res->sr_highest_slotid = be32_to_cpup(p++);
5713         /* target highest slot id */
5714         res->sr_target_highest_slotid = be32_to_cpup(p++);
5715         /* result flags */
5716         res->sr_status_flags = be32_to_cpup(p);
5717         status = 0;
5718 out_err:
5719         res->sr_status = status;
5720         return status;
5721 out_overflow:
5722         print_overflow_msg(__func__, xdr);
5723         status = -EIO;
5724         goto out_err;
5725 #else  /* CONFIG_NFS_V4_1 */
5726         return 0;
5727 #endif /* CONFIG_NFS_V4_1 */
5728 }
5729
5730 #if defined(CONFIG_NFS_V4_1)
5731 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5732                                 struct pnfs_device *pdev)
5733 {
5734         __be32 *p;
5735         uint32_t len, type;
5736         int status;
5737
5738         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5739         if (status) {
5740                 if (status == -ETOOSMALL) {
5741                         p = xdr_inline_decode(xdr, 4);
5742                         if (unlikely(!p))
5743                                 goto out_overflow;
5744                         pdev->mincount = be32_to_cpup(p);
5745                         dprintk("%s: Min count too small. mincnt = %u\n",
5746                                 __func__, pdev->mincount);
5747                 }
5748                 return status;
5749         }
5750
5751         p = xdr_inline_decode(xdr, 8);
5752         if (unlikely(!p))
5753                 goto out_overflow;
5754         type = be32_to_cpup(p++);
5755         if (type != pdev->layout_type) {
5756                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5757                         __func__, pdev->layout_type, type);
5758                 return -EINVAL;
5759         }
5760         /*
5761          * Get the length of the opaque device_addr4. xdr_read_pages places
5762          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5763          * and places the remaining xdr data in xdr_buf->tail
5764          */
5765         pdev->mincount = be32_to_cpup(p);
5766         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5767                 goto out_overflow;
5768
5769         /* Parse notification bitmap, verifying that it is zero. */
5770         p = xdr_inline_decode(xdr, 4);
5771         if (unlikely(!p))
5772                 goto out_overflow;
5773         len = be32_to_cpup(p);
5774         if (len) {
5775                 uint32_t i;
5776
5777                 p = xdr_inline_decode(xdr, 4 * len);
5778                 if (unlikely(!p))
5779                         goto out_overflow;
5780
5781                 if (be32_to_cpup(p++) &
5782                     ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5783                         dprintk("%s: unsupported notification\n",
5784                                 __func__);
5785                 }
5786
5787                 for (i = 1; i < len; i++) {
5788                         if (be32_to_cpup(p++)) {
5789                                 dprintk("%s: unsupported notification\n",
5790                                         __func__);
5791                                 return -EIO;
5792                         }
5793                 }
5794         }
5795         return 0;
5796 out_overflow:
5797         print_overflow_msg(__func__, xdr);
5798         return -EIO;
5799 }
5800
5801 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5802                             struct nfs4_layoutget_res *res)
5803 {
5804         __be32 *p;
5805         int status;
5806         u32 layout_count;
5807         u32 recvd;
5808
5809         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5810         if (status)
5811                 return status;
5812         p = xdr_inline_decode(xdr, 4);
5813         if (unlikely(!p))
5814                 goto out_overflow;
5815         res->return_on_close = be32_to_cpup(p);
5816         decode_stateid(xdr, &res->stateid);
5817         p = xdr_inline_decode(xdr, 4);
5818         if (unlikely(!p))
5819                 goto out_overflow;
5820         layout_count = be32_to_cpup(p);
5821         if (!layout_count) {
5822                 dprintk("%s: server responded with empty layout array\n",
5823                         __func__);
5824                 return -EINVAL;
5825         }
5826
5827         p = xdr_inline_decode(xdr, 28);
5828         if (unlikely(!p))
5829                 goto out_overflow;
5830         p = xdr_decode_hyper(p, &res->range.offset);
5831         p = xdr_decode_hyper(p, &res->range.length);
5832         res->range.iomode = be32_to_cpup(p++);
5833         res->type = be32_to_cpup(p++);
5834         res->layoutp->len = be32_to_cpup(p);
5835
5836         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5837                 __func__,
5838                 (unsigned long)res->range.offset,
5839                 (unsigned long)res->range.length,
5840                 res->range.iomode,
5841                 res->type,
5842                 res->layoutp->len);
5843
5844         recvd = xdr_read_pages(xdr, res->layoutp->len);
5845         if (res->layoutp->len > recvd) {
5846                 dprintk("NFS: server cheating in layoutget reply: "
5847                                 "layout len %u > recvd %u\n",
5848                                 res->layoutp->len, recvd);
5849                 return -EINVAL;
5850         }
5851
5852         if (layout_count > 1) {
5853                 /* We only handle a length one array at the moment.  Any
5854                  * further entries are just ignored.  Note that this means
5855                  * the client may see a response that is less than the
5856                  * minimum it requested.
5857                  */
5858                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5859                         __func__, layout_count);
5860         }
5861
5862         return 0;
5863 out_overflow:
5864         print_overflow_msg(__func__, xdr);
5865         return -EIO;
5866 }
5867
5868 static int decode_layoutreturn(struct xdr_stream *xdr,
5869                                struct nfs4_layoutreturn_res *res)
5870 {
5871         __be32 *p;
5872         int status;
5873
5874         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5875         if (status)
5876                 return status;
5877         p = xdr_inline_decode(xdr, 4);
5878         if (unlikely(!p))
5879                 goto out_overflow;
5880         res->lrs_present = be32_to_cpup(p);
5881         if (res->lrs_present)
5882                 status = decode_stateid(xdr, &res->stateid);
5883         return status;
5884 out_overflow:
5885         print_overflow_msg(__func__, xdr);
5886         return -EIO;
5887 }
5888
5889 static int decode_layoutcommit(struct xdr_stream *xdr,
5890                                struct rpc_rqst *req,
5891                                struct nfs4_layoutcommit_res *res)
5892 {
5893         __be32 *p;
5894         __u32 sizechanged;
5895         int status;
5896
5897         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5898         res->status = status;
5899         if (status)
5900                 return status;
5901
5902         p = xdr_inline_decode(xdr, 4);
5903         if (unlikely(!p))
5904                 goto out_overflow;
5905         sizechanged = be32_to_cpup(p);
5906
5907         if (sizechanged) {
5908                 /* throw away new size */
5909                 p = xdr_inline_decode(xdr, 8);
5910                 if (unlikely(!p))
5911                         goto out_overflow;
5912         }
5913         return 0;
5914 out_overflow:
5915         print_overflow_msg(__func__, xdr);
5916         return -EIO;
5917 }
5918
5919 static int decode_test_stateid(struct xdr_stream *xdr,
5920                                struct nfs41_test_stateid_res *res)
5921 {
5922         __be32 *p;
5923         int status;
5924         int num_res;
5925
5926         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5927         if (status)
5928                 return status;
5929
5930         p = xdr_inline_decode(xdr, 4);
5931         if (unlikely(!p))
5932                 goto out_overflow;
5933         num_res = be32_to_cpup(p++);
5934         if (num_res != 1)
5935                 goto out;
5936
5937         p = xdr_inline_decode(xdr, 4);
5938         if (unlikely(!p))
5939                 goto out_overflow;
5940         res->status = be32_to_cpup(p++);
5941
5942         return status;
5943 out_overflow:
5944         print_overflow_msg(__func__, xdr);
5945 out:
5946         return -EIO;
5947 }
5948
5949 static int decode_free_stateid(struct xdr_stream *xdr,
5950                                struct nfs41_free_stateid_res *res)
5951 {
5952         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5953         return res->status;
5954 }
5955 #endif /* CONFIG_NFS_V4_1 */
5956
5957 /*
5958  * END OF "GENERIC" DECODE ROUTINES.
5959  */
5960
5961 /*
5962  * Decode OPEN_DOWNGRADE response
5963  */
5964 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5965                                        struct xdr_stream *xdr,
5966                                        struct nfs_closeres *res)
5967 {
5968         struct compound_hdr hdr;
5969         int status;
5970
5971         status = decode_compound_hdr(xdr, &hdr);
5972         if (status)
5973                 goto out;
5974         status = decode_sequence(xdr, &res->seq_res, rqstp);
5975         if (status)
5976                 goto out;
5977         status = decode_putfh(xdr);
5978         if (status)
5979                 goto out;
5980         status = decode_open_downgrade(xdr, res);
5981         if (status != 0)
5982                 goto out;
5983         decode_getfattr(xdr, res->fattr, res->server);
5984 out:
5985         return status;
5986 }
5987
5988 /*
5989  * Decode ACCESS response
5990  */
5991 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5992                                struct nfs4_accessres *res)
5993 {
5994         struct compound_hdr hdr;
5995         int status;
5996
5997         status = decode_compound_hdr(xdr, &hdr);
5998         if (status)
5999                 goto out;
6000         status = decode_sequence(xdr, &res->seq_res, rqstp);
6001         if (status)
6002                 goto out;
6003         status = decode_putfh(xdr);
6004         if (status != 0)
6005                 goto out;
6006         status = decode_access(xdr, &res->supported, &res->access);
6007         if (status != 0)
6008                 goto out;
6009         decode_getfattr(xdr, res->fattr, res->server);
6010 out:
6011         return status;
6012 }
6013
6014 /*
6015  * Decode LOOKUP response
6016  */
6017 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6018                                struct nfs4_lookup_res *res)
6019 {
6020         struct compound_hdr hdr;
6021         int status;
6022
6023         status = decode_compound_hdr(xdr, &hdr);
6024         if (status)
6025                 goto out;
6026         status = decode_sequence(xdr, &res->seq_res, rqstp);
6027         if (status)
6028                 goto out;
6029         status = decode_putfh(xdr);
6030         if (status)
6031                 goto out;
6032         status = decode_lookup(xdr);
6033         if (status)
6034                 goto out;
6035         status = decode_getfh(xdr, res->fh);
6036         if (status)
6037                 goto out;
6038         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6039 out:
6040         return status;
6041 }
6042
6043 /*
6044  * Decode LOOKUP_ROOT response
6045  */
6046 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6047                                     struct xdr_stream *xdr,
6048                                     struct nfs4_lookup_res *res)
6049 {
6050         struct compound_hdr hdr;
6051         int status;
6052
6053         status = decode_compound_hdr(xdr, &hdr);
6054         if (status)
6055                 goto out;
6056         status = decode_sequence(xdr, &res->seq_res, rqstp);
6057         if (status)
6058                 goto out;
6059         status = decode_putrootfh(xdr);
6060         if (status)
6061                 goto out;
6062         status = decode_getfh(xdr, res->fh);
6063         if (status == 0)
6064                 status = decode_getfattr_label(xdr, res->fattr,
6065                                                 res->label, res->server);
6066 out:
6067         return status;
6068 }
6069
6070 /*
6071  * Decode REMOVE response
6072  */
6073 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6074                                struct nfs_removeres *res)
6075 {
6076         struct compound_hdr hdr;
6077         int status;
6078
6079         status = decode_compound_hdr(xdr, &hdr);
6080         if (status)
6081                 goto out;
6082         status = decode_sequence(xdr, &res->seq_res, rqstp);
6083         if (status)
6084                 goto out;
6085         status = decode_putfh(xdr);
6086         if (status)
6087                 goto out;
6088         status = decode_remove(xdr, &res->cinfo);
6089 out:
6090         return status;
6091 }
6092
6093 /*
6094  * Decode RENAME response
6095  */
6096 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6097                                struct nfs_renameres *res)
6098 {
6099         struct compound_hdr hdr;
6100         int status;
6101
6102         status = decode_compound_hdr(xdr, &hdr);
6103         if (status)
6104                 goto out;
6105         status = decode_sequence(xdr, &res->seq_res, rqstp);
6106         if (status)
6107                 goto out;
6108         status = decode_putfh(xdr);
6109         if (status)
6110                 goto out;
6111         status = decode_savefh(xdr);
6112         if (status)
6113                 goto out;
6114         status = decode_putfh(xdr);
6115         if (status)
6116                 goto out;
6117         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6118 out:
6119         return status;
6120 }
6121
6122 /*
6123  * Decode LINK response
6124  */
6125 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6126                              struct nfs4_link_res *res)
6127 {
6128         struct compound_hdr hdr;
6129         int status;
6130
6131         status = decode_compound_hdr(xdr, &hdr);
6132         if (status)
6133                 goto out;
6134         status = decode_sequence(xdr, &res->seq_res, rqstp);
6135         if (status)
6136                 goto out;
6137         status = decode_putfh(xdr);
6138         if (status)
6139                 goto out;
6140         status = decode_savefh(xdr);
6141         if (status)
6142                 goto out;
6143         status = decode_putfh(xdr);
6144         if (status)
6145                 goto out;
6146         status = decode_link(xdr, &res->cinfo);
6147         if (status)
6148                 goto out;
6149         /*
6150          * Note order: OP_LINK leaves the directory as the current
6151          *             filehandle.
6152          */
6153         status = decode_restorefh(xdr);
6154         if (status)
6155                 goto out;
6156         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6157 out:
6158         return status;
6159 }
6160
6161 /*
6162  * Decode CREATE response
6163  */
6164 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6165                                struct nfs4_create_res *res)
6166 {
6167         struct compound_hdr hdr;
6168         int status;
6169
6170         status = decode_compound_hdr(xdr, &hdr);
6171         if (status)
6172                 goto out;
6173         status = decode_sequence(xdr, &res->seq_res, rqstp);
6174         if (status)
6175                 goto out;
6176         status = decode_putfh(xdr);
6177         if (status)
6178                 goto out;
6179         status = decode_create(xdr, &res->dir_cinfo);
6180         if (status)
6181                 goto out;
6182         status = decode_getfh(xdr, res->fh);
6183         if (status)
6184                 goto out;
6185         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6186 out:
6187         return status;
6188 }
6189
6190 /*
6191  * Decode SYMLINK response
6192  */
6193 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6194                                 struct nfs4_create_res *res)
6195 {
6196         return nfs4_xdr_dec_create(rqstp, xdr, res);
6197 }
6198
6199 /*
6200  * Decode GETATTR response
6201  */
6202 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203                                 struct nfs4_getattr_res *res)
6204 {
6205         struct compound_hdr hdr;
6206         int status;
6207
6208         status = decode_compound_hdr(xdr, &hdr);
6209         if (status)
6210                 goto out;
6211         status = decode_sequence(xdr, &res->seq_res, rqstp);
6212         if (status)
6213                 goto out;
6214         status = decode_putfh(xdr);
6215         if (status)
6216                 goto out;
6217         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6218 out:
6219         return status;
6220 }
6221
6222 /*
6223  * Encode an SETACL request
6224  */
6225 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6226                                 struct nfs_setaclargs *args)
6227 {
6228         struct compound_hdr hdr = {
6229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6230         };
6231
6232         encode_compound_hdr(xdr, req, &hdr);
6233         encode_sequence(xdr, &args->seq_args, &hdr);
6234         encode_putfh(xdr, args->fh, &hdr);
6235         encode_setacl(xdr, args, &hdr);
6236         encode_nops(&hdr);
6237 }
6238
6239 /*
6240  * Decode SETACL response
6241  */
6242 static int
6243 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6244                     struct nfs_setaclres *res)
6245 {
6246         struct compound_hdr hdr;
6247         int status;
6248
6249         status = decode_compound_hdr(xdr, &hdr);
6250         if (status)
6251                 goto out;
6252         status = decode_sequence(xdr, &res->seq_res, rqstp);
6253         if (status)
6254                 goto out;
6255         status = decode_putfh(xdr);
6256         if (status)
6257                 goto out;
6258         status = decode_setattr(xdr);
6259 out:
6260         return status;
6261 }
6262
6263 /*
6264  * Decode GETACL response
6265  */
6266 static int
6267 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                     struct nfs_getaclres *res)
6269 {
6270         struct compound_hdr hdr;
6271         int status;
6272
6273         if (res->acl_scratch != NULL) {
6274                 void *p = page_address(res->acl_scratch);
6275                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6276         }
6277         status = decode_compound_hdr(xdr, &hdr);
6278         if (status)
6279                 goto out;
6280         status = decode_sequence(xdr, &res->seq_res, rqstp);
6281         if (status)
6282                 goto out;
6283         status = decode_putfh(xdr);
6284         if (status)
6285                 goto out;
6286         status = decode_getacl(xdr, rqstp, res);
6287
6288 out:
6289         return status;
6290 }
6291
6292 /*
6293  * Decode CLOSE response
6294  */
6295 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6296                               struct nfs_closeres *res)
6297 {
6298         struct compound_hdr hdr;
6299         int status;
6300
6301         status = decode_compound_hdr(xdr, &hdr);
6302         if (status)
6303                 goto out;
6304         status = decode_sequence(xdr, &res->seq_res, rqstp);
6305         if (status)
6306                 goto out;
6307         status = decode_putfh(xdr);
6308         if (status)
6309                 goto out;
6310         status = decode_close(xdr, res);
6311         if (status != 0)
6312                 goto out;
6313         /*
6314          * Note: Server may do delete on close for this file
6315          *      in which case the getattr call will fail with
6316          *      an ESTALE error. Shouldn't be a problem,
6317          *      though, since fattr->valid will remain unset.
6318          */
6319         decode_getfattr(xdr, res->fattr, res->server);
6320 out:
6321         return status;
6322 }
6323
6324 /*
6325  * Decode OPEN response
6326  */
6327 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6328                              struct nfs_openres *res)
6329 {
6330         struct compound_hdr hdr;
6331         int status;
6332
6333         status = decode_compound_hdr(xdr, &hdr);
6334         if (status)
6335                 goto out;
6336         status = decode_sequence(xdr, &res->seq_res, rqstp);
6337         if (status)
6338                 goto out;
6339         status = decode_putfh(xdr);
6340         if (status)
6341                 goto out;
6342         status = decode_open(xdr, res);
6343         if (status)
6344                 goto out;
6345         status = decode_getfh(xdr, &res->fh);
6346         if (status)
6347                 goto out;
6348         if (res->access_request)
6349                 decode_access(xdr, &res->access_supported, &res->access_result);
6350         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6351 out:
6352         return status;
6353 }
6354
6355 /*
6356  * Decode OPEN_CONFIRM response
6357  */
6358 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6359                                      struct xdr_stream *xdr,
6360                                      struct nfs_open_confirmres *res)
6361 {
6362         struct compound_hdr hdr;
6363         int status;
6364
6365         status = decode_compound_hdr(xdr, &hdr);
6366         if (status)
6367                 goto out;
6368         status = decode_putfh(xdr);
6369         if (status)
6370                 goto out;
6371         status = decode_open_confirm(xdr, res);
6372 out:
6373         return status;
6374 }
6375
6376 /*
6377  * Decode OPEN response
6378  */
6379 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6380                                     struct xdr_stream *xdr,
6381                                     struct nfs_openres *res)
6382 {
6383         struct compound_hdr hdr;
6384         int status;
6385
6386         status = decode_compound_hdr(xdr, &hdr);
6387         if (status)
6388                 goto out;
6389         status = decode_sequence(xdr, &res->seq_res, rqstp);
6390         if (status)
6391                 goto out;
6392         status = decode_putfh(xdr);
6393         if (status)
6394                 goto out;
6395         status = decode_open(xdr, res);
6396         if (status)
6397                 goto out;
6398         if (res->access_request)
6399                 decode_access(xdr, &res->access_supported, &res->access_result);
6400         decode_getfattr(xdr, res->f_attr, res->server);
6401 out:
6402         return status;
6403 }
6404
6405 /*
6406  * Decode SETATTR response
6407  */
6408 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6409                                 struct xdr_stream *xdr,
6410                                 struct nfs_setattrres *res)
6411 {
6412         struct compound_hdr hdr;
6413         int status;
6414
6415         status = decode_compound_hdr(xdr, &hdr);
6416         if (status)
6417                 goto out;
6418         status = decode_sequence(xdr, &res->seq_res, rqstp);
6419         if (status)
6420                 goto out;
6421         status = decode_putfh(xdr);
6422         if (status)
6423                 goto out;
6424         status = decode_setattr(xdr);
6425         if (status)
6426                 goto out;
6427         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6428 out:
6429         return status;
6430 }
6431
6432 /*
6433  * Decode LOCK response
6434  */
6435 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6436                              struct nfs_lock_res *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_lock(xdr, res);
6451 out:
6452         return status;
6453 }
6454
6455 /*
6456  * Decode LOCKT response
6457  */
6458 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6459                               struct nfs_lockt_res *res)
6460 {
6461         struct compound_hdr hdr;
6462         int status;
6463
6464         status = decode_compound_hdr(xdr, &hdr);
6465         if (status)
6466                 goto out;
6467         status = decode_sequence(xdr, &res->seq_res, rqstp);
6468         if (status)
6469                 goto out;
6470         status = decode_putfh(xdr);
6471         if (status)
6472                 goto out;
6473         status = decode_lockt(xdr, res);
6474 out:
6475         return status;
6476 }
6477
6478 /*
6479  * Decode LOCKU response
6480  */
6481 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6482                               struct nfs_locku_res *res)
6483 {
6484         struct compound_hdr hdr;
6485         int status;
6486
6487         status = decode_compound_hdr(xdr, &hdr);
6488         if (status)
6489                 goto out;
6490         status = decode_sequence(xdr, &res->seq_res, rqstp);
6491         if (status)
6492                 goto out;
6493         status = decode_putfh(xdr);
6494         if (status)
6495                 goto out;
6496         status = decode_locku(xdr, res);
6497 out:
6498         return status;
6499 }
6500
6501 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6502                                           struct xdr_stream *xdr, void *dummy)
6503 {
6504         struct compound_hdr hdr;
6505         int status;
6506
6507         status = decode_compound_hdr(xdr, &hdr);
6508         if (!status)
6509                 status = decode_release_lockowner(xdr);
6510         return status;
6511 }
6512
6513 /*
6514  * Decode READLINK response
6515  */
6516 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6517                                  struct xdr_stream *xdr,
6518                                  struct nfs4_readlink_res *res)
6519 {
6520         struct compound_hdr hdr;
6521         int status;
6522
6523         status = decode_compound_hdr(xdr, &hdr);
6524         if (status)
6525                 goto out;
6526         status = decode_sequence(xdr, &res->seq_res, rqstp);
6527         if (status)
6528                 goto out;
6529         status = decode_putfh(xdr);
6530         if (status)
6531                 goto out;
6532         status = decode_readlink(xdr, rqstp);
6533 out:
6534         return status;
6535 }
6536
6537 /*
6538  * Decode READDIR response
6539  */
6540 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6541                                 struct nfs4_readdir_res *res)
6542 {
6543         struct compound_hdr hdr;
6544         int status;
6545
6546         status = decode_compound_hdr(xdr, &hdr);
6547         if (status)
6548                 goto out;
6549         status = decode_sequence(xdr, &res->seq_res, rqstp);
6550         if (status)
6551                 goto out;
6552         status = decode_putfh(xdr);
6553         if (status)
6554                 goto out;
6555         status = decode_readdir(xdr, rqstp, res);
6556 out:
6557         return status;
6558 }
6559
6560 /*
6561  * Decode Read response
6562  */
6563 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6564                              struct nfs_pgio_res *res)
6565 {
6566         struct compound_hdr hdr;
6567         int status;
6568
6569         status = decode_compound_hdr(xdr, &hdr);
6570         if (status)
6571                 goto out;
6572         status = decode_sequence(xdr, &res->seq_res, rqstp);
6573         if (status)
6574                 goto out;
6575         status = decode_putfh(xdr);
6576         if (status)
6577                 goto out;
6578         status = decode_read(xdr, rqstp, res);
6579         if (!status)
6580                 status = res->count;
6581 out:
6582         return status;
6583 }
6584
6585 /*
6586  * Decode WRITE response
6587  */
6588 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6589                               struct nfs_pgio_res *res)
6590 {
6591         struct compound_hdr hdr;
6592         int status;
6593
6594         status = decode_compound_hdr(xdr, &hdr);
6595         if (status)
6596                 goto out;
6597         status = decode_sequence(xdr, &res->seq_res, rqstp);
6598         if (status)
6599                 goto out;
6600         status = decode_putfh(xdr);
6601         if (status)
6602                 goto out;
6603         status = decode_write(xdr, res);
6604         if (status)
6605                 goto out;
6606         if (res->fattr)
6607                 decode_getfattr(xdr, res->fattr, res->server);
6608         if (!status)
6609                 status = res->count;
6610 out:
6611         return status;
6612 }
6613
6614 /*
6615  * Decode COMMIT response
6616  */
6617 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6618                                struct nfs_commitres *res)
6619 {
6620         struct compound_hdr hdr;
6621         int status;
6622
6623         status = decode_compound_hdr(xdr, &hdr);
6624         if (status)
6625                 goto out;
6626         status = decode_sequence(xdr, &res->seq_res, rqstp);
6627         if (status)
6628                 goto out;
6629         status = decode_putfh(xdr);
6630         if (status)
6631                 goto out;
6632         status = decode_commit(xdr, res);
6633 out:
6634         return status;
6635 }
6636
6637 /*
6638  * Decode FSINFO response
6639  */
6640 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6641                                struct nfs4_fsinfo_res *res)
6642 {
6643         struct compound_hdr hdr;
6644         int status;
6645
6646         status = decode_compound_hdr(xdr, &hdr);
6647         if (!status)
6648                 status = decode_sequence(xdr, &res->seq_res, req);
6649         if (!status)
6650                 status = decode_putfh(xdr);
6651         if (!status)
6652                 status = decode_fsinfo(xdr, res->fsinfo);
6653         return status;
6654 }
6655
6656 /*
6657  * Decode PATHCONF response
6658  */
6659 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6660                                  struct nfs4_pathconf_res *res)
6661 {
6662         struct compound_hdr hdr;
6663         int status;
6664
6665         status = decode_compound_hdr(xdr, &hdr);
6666         if (!status)
6667                 status = decode_sequence(xdr, &res->seq_res, req);
6668         if (!status)
6669                 status = decode_putfh(xdr);
6670         if (!status)
6671                 status = decode_pathconf(xdr, res->pathconf);
6672         return status;
6673 }
6674
6675 /*
6676  * Decode STATFS response
6677  */
6678 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6679                                struct nfs4_statfs_res *res)
6680 {
6681         struct compound_hdr hdr;
6682         int status;
6683
6684         status = decode_compound_hdr(xdr, &hdr);
6685         if (!status)
6686                 status = decode_sequence(xdr, &res->seq_res, req);
6687         if (!status)
6688                 status = decode_putfh(xdr);
6689         if (!status)
6690                 status = decode_statfs(xdr, res->fsstat);
6691         return status;
6692 }
6693
6694 /*
6695  * Decode GETATTR_BITMAP response
6696  */
6697 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6698                                     struct xdr_stream *xdr,
6699                                     struct nfs4_server_caps_res *res)
6700 {
6701         struct compound_hdr hdr;
6702         int status;
6703
6704         status = decode_compound_hdr(xdr, &hdr);
6705         if (status)
6706                 goto out;
6707         status = decode_sequence(xdr, &res->seq_res, req);
6708         if (status)
6709                 goto out;
6710         status = decode_putfh(xdr);
6711         if (status)
6712                 goto out;
6713         status = decode_server_caps(xdr, res);
6714 out:
6715         return status;
6716 }
6717
6718 /*
6719  * Decode RENEW response
6720  */
6721 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6722                               void *__unused)
6723 {
6724         struct compound_hdr hdr;
6725         int status;
6726
6727         status = decode_compound_hdr(xdr, &hdr);
6728         if (!status)
6729                 status = decode_renew(xdr);
6730         return status;
6731 }
6732
6733 /*
6734  * Decode SETCLIENTID response
6735  */
6736 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6737                                     struct xdr_stream *xdr,
6738                                     struct nfs4_setclientid_res *res)
6739 {
6740         struct compound_hdr hdr;
6741         int status;
6742
6743         status = decode_compound_hdr(xdr, &hdr);
6744         if (!status)
6745                 status = decode_setclientid(xdr, res);
6746         return status;
6747 }
6748
6749 /*
6750  * Decode SETCLIENTID_CONFIRM response
6751  */
6752 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6753                                             struct xdr_stream *xdr)
6754 {
6755         struct compound_hdr hdr;
6756         int status;
6757
6758         status = decode_compound_hdr(xdr, &hdr);
6759         if (!status)
6760                 status = decode_setclientid_confirm(xdr);
6761         return status;
6762 }
6763
6764 /*
6765  * Decode DELEGRETURN response
6766  */
6767 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6768                                     struct xdr_stream *xdr,
6769                                     struct nfs4_delegreturnres *res)
6770 {
6771         struct compound_hdr hdr;
6772         int status;
6773
6774         status = decode_compound_hdr(xdr, &hdr);
6775         if (status)
6776                 goto out;
6777         status = decode_sequence(xdr, &res->seq_res, rqstp);
6778         if (status)
6779                 goto out;
6780         status = decode_putfh(xdr);
6781         if (status != 0)
6782                 goto out;
6783         status = decode_getfattr(xdr, res->fattr, res->server);
6784         if (status != 0)
6785                 goto out;
6786         status = decode_delegreturn(xdr);
6787 out:
6788         return status;
6789 }
6790
6791 /*
6792  * Decode FS_LOCATIONS response
6793  */
6794 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6795                                      struct xdr_stream *xdr,
6796                                      struct nfs4_fs_locations_res *res)
6797 {
6798         struct compound_hdr hdr;
6799         int status;
6800
6801         status = decode_compound_hdr(xdr, &hdr);
6802         if (status)
6803                 goto out;
6804         status = decode_sequence(xdr, &res->seq_res, req);
6805         if (status)
6806                 goto out;
6807         status = decode_putfh(xdr);
6808         if (status)
6809                 goto out;
6810         if (res->migration) {
6811                 xdr_enter_page(xdr, PAGE_SIZE);
6812                 status = decode_getfattr_generic(xdr,
6813                                         &res->fs_locations->fattr,
6814                                          NULL, res->fs_locations,
6815                                          NULL, res->fs_locations->server);
6816                 if (status)
6817                         goto out;
6818                 if (res->renew)
6819                         status = decode_renew(xdr);
6820         } else {
6821                 status = decode_lookup(xdr);
6822                 if (status)
6823                         goto out;
6824                 xdr_enter_page(xdr, PAGE_SIZE);
6825                 status = decode_getfattr_generic(xdr,
6826                                         &res->fs_locations->fattr,
6827                                          NULL, res->fs_locations,
6828                                          NULL, res->fs_locations->server);
6829         }
6830 out:
6831         return status;
6832 }
6833
6834 /*
6835  * Decode SECINFO response
6836  */
6837 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6838                                 struct xdr_stream *xdr,
6839                                 struct nfs4_secinfo_res *res)
6840 {
6841         struct compound_hdr hdr;
6842         int status;
6843
6844         status = decode_compound_hdr(xdr, &hdr);
6845         if (status)
6846                 goto out;
6847         status = decode_sequence(xdr, &res->seq_res, rqstp);
6848         if (status)
6849                 goto out;
6850         status = decode_putfh(xdr);
6851         if (status)
6852                 goto out;
6853         status = decode_secinfo(xdr, res);
6854 out:
6855         return status;
6856 }
6857
6858 /*
6859  * Decode FSID_PRESENT response
6860  */
6861 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6862                                      struct xdr_stream *xdr,
6863                                      struct nfs4_fsid_present_res *res)
6864 {
6865         struct compound_hdr hdr;
6866         int status;
6867
6868         status = decode_compound_hdr(xdr, &hdr);
6869         if (status)
6870                 goto out;
6871         status = decode_sequence(xdr, &res->seq_res, rqstp);
6872         if (status)
6873                 goto out;
6874         status = decode_putfh(xdr);
6875         if (status)
6876                 goto out;
6877         status = decode_getfh(xdr, res->fh);
6878         if (status)
6879                 goto out;
6880         if (res->renew)
6881                 status = decode_renew(xdr);
6882 out:
6883         return status;
6884 }
6885
6886 #if defined(CONFIG_NFS_V4_1)
6887 /*
6888  * Decode BIND_CONN_TO_SESSION response
6889  */
6890 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6891                                         struct xdr_stream *xdr,
6892                                         void *res)
6893 {
6894         struct compound_hdr hdr;
6895         int status;
6896
6897         status = decode_compound_hdr(xdr, &hdr);
6898         if (!status)
6899                 status = decode_bind_conn_to_session(xdr, res);
6900         return status;
6901 }
6902
6903 /*
6904  * Decode EXCHANGE_ID response
6905  */
6906 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6907                                     struct xdr_stream *xdr,
6908                                     void *res)
6909 {
6910         struct compound_hdr hdr;
6911         int status;
6912
6913         status = decode_compound_hdr(xdr, &hdr);
6914         if (!status)
6915                 status = decode_exchange_id(xdr, res);
6916         return status;
6917 }
6918
6919 /*
6920  * Decode CREATE_SESSION response
6921  */
6922 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6923                                        struct xdr_stream *xdr,
6924                                        struct nfs41_create_session_res *res)
6925 {
6926         struct compound_hdr hdr;
6927         int status;
6928
6929         status = decode_compound_hdr(xdr, &hdr);
6930         if (!status)
6931                 status = decode_create_session(xdr, res);
6932         return status;
6933 }
6934
6935 /*
6936  * Decode DESTROY_SESSION response
6937  */
6938 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6939                                         struct xdr_stream *xdr,
6940                                         void *res)
6941 {
6942         struct compound_hdr hdr;
6943         int status;
6944
6945         status = decode_compound_hdr(xdr, &hdr);
6946         if (!status)
6947                 status = decode_destroy_session(xdr, res);
6948         return status;
6949 }
6950
6951 /*
6952  * Decode DESTROY_CLIENTID response
6953  */
6954 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6955                                         struct xdr_stream *xdr,
6956                                         void *res)
6957 {
6958         struct compound_hdr hdr;
6959         int status;
6960
6961         status = decode_compound_hdr(xdr, &hdr);
6962         if (!status)
6963                 status = decode_destroy_clientid(xdr, res);
6964         return status;
6965 }
6966
6967 /*
6968  * Decode SEQUENCE response
6969  */
6970 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6971                                  struct xdr_stream *xdr,
6972                                  struct nfs4_sequence_res *res)
6973 {
6974         struct compound_hdr hdr;
6975         int status;
6976
6977         status = decode_compound_hdr(xdr, &hdr);
6978         if (!status)
6979                 status = decode_sequence(xdr, res, rqstp);
6980         return status;
6981 }
6982
6983 /*
6984  * Decode GET_LEASE_TIME response
6985  */
6986 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6987                                        struct xdr_stream *xdr,
6988                                        struct nfs4_get_lease_time_res *res)
6989 {
6990         struct compound_hdr hdr;
6991         int status;
6992
6993         status = decode_compound_hdr(xdr, &hdr);
6994         if (!status)
6995                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6996         if (!status)
6997                 status = decode_putrootfh(xdr);
6998         if (!status)
6999                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7000         return status;
7001 }
7002
7003 /*
7004  * Decode RECLAIM_COMPLETE response
7005  */
7006 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7007                                          struct xdr_stream *xdr,
7008                                          struct nfs41_reclaim_complete_res *res)
7009 {
7010         struct compound_hdr hdr;
7011         int status;
7012
7013         status = decode_compound_hdr(xdr, &hdr);
7014         if (!status)
7015                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7016         if (!status)
7017                 status = decode_reclaim_complete(xdr, NULL);
7018         return status;
7019 }
7020
7021 /*
7022  * Decode GETDEVINFO response
7023  */
7024 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7025                                       struct xdr_stream *xdr,
7026                                       struct nfs4_getdeviceinfo_res *res)
7027 {
7028         struct compound_hdr hdr;
7029         int status;
7030
7031         status = decode_compound_hdr(xdr, &hdr);
7032         if (status != 0)
7033                 goto out;
7034         status = decode_sequence(xdr, &res->seq_res, rqstp);
7035         if (status != 0)
7036                 goto out;
7037         status = decode_getdeviceinfo(xdr, res->pdev);
7038 out:
7039         return status;
7040 }
7041
7042 /*
7043  * Decode LAYOUTGET response
7044  */
7045 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7046                                   struct xdr_stream *xdr,
7047                                   struct nfs4_layoutget_res *res)
7048 {
7049         struct compound_hdr hdr;
7050         int status;
7051
7052         status = decode_compound_hdr(xdr, &hdr);
7053         if (status)
7054                 goto out;
7055         status = decode_sequence(xdr, &res->seq_res, rqstp);
7056         if (status)
7057                 goto out;
7058         status = decode_putfh(xdr);
7059         if (status)
7060                 goto out;
7061         status = decode_layoutget(xdr, rqstp, res);
7062 out:
7063         return status;
7064 }
7065
7066 /*
7067  * Decode LAYOUTRETURN response
7068  */
7069 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7070                                      struct xdr_stream *xdr,
7071                                      struct nfs4_layoutreturn_res *res)
7072 {
7073         struct compound_hdr hdr;
7074         int status;
7075
7076         status = decode_compound_hdr(xdr, &hdr);
7077         if (status)
7078                 goto out;
7079         status = decode_sequence(xdr, &res->seq_res, rqstp);
7080         if (status)
7081                 goto out;
7082         status = decode_putfh(xdr);
7083         if (status)
7084                 goto out;
7085         status = decode_layoutreturn(xdr, res);
7086 out:
7087         return status;
7088 }
7089
7090 /*
7091  * Decode LAYOUTCOMMIT response
7092  */
7093 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7094                                      struct xdr_stream *xdr,
7095                                      struct nfs4_layoutcommit_res *res)
7096 {
7097         struct compound_hdr hdr;
7098         int status;
7099
7100         status = decode_compound_hdr(xdr, &hdr);
7101         if (status)
7102                 goto out;
7103         status = decode_sequence(xdr, &res->seq_res, rqstp);
7104         if (status)
7105                 goto out;
7106         status = decode_putfh(xdr);
7107         if (status)
7108                 goto out;
7109         status = decode_layoutcommit(xdr, rqstp, res);
7110         if (status)
7111                 goto out;
7112         decode_getfattr(xdr, res->fattr, res->server);
7113 out:
7114         return status;
7115 }
7116
7117 /*
7118  * Decode SECINFO_NO_NAME response
7119  */
7120 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7121                                         struct xdr_stream *xdr,
7122                                         struct nfs4_secinfo_res *res)
7123 {
7124         struct compound_hdr hdr;
7125         int status;
7126
7127         status = decode_compound_hdr(xdr, &hdr);
7128         if (status)
7129                 goto out;
7130         status = decode_sequence(xdr, &res->seq_res, rqstp);
7131         if (status)
7132                 goto out;
7133         status = decode_putrootfh(xdr);
7134         if (status)
7135                 goto out;
7136         status = decode_secinfo_no_name(xdr, res);
7137 out:
7138         return status;
7139 }
7140
7141 /*
7142  * Decode TEST_STATEID response
7143  */
7144 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7145                                      struct xdr_stream *xdr,
7146                                      struct nfs41_test_stateid_res *res)
7147 {
7148         struct compound_hdr hdr;
7149         int status;
7150
7151         status = decode_compound_hdr(xdr, &hdr);
7152         if (status)
7153                 goto out;
7154         status = decode_sequence(xdr, &res->seq_res, rqstp);
7155         if (status)
7156                 goto out;
7157         status = decode_test_stateid(xdr, res);
7158 out:
7159         return status;
7160 }
7161
7162 /*
7163  * Decode FREE_STATEID response
7164  */
7165 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7166                                      struct xdr_stream *xdr,
7167                                      struct nfs41_free_stateid_res *res)
7168 {
7169         struct compound_hdr hdr;
7170         int status;
7171
7172         status = decode_compound_hdr(xdr, &hdr);
7173         if (status)
7174                 goto out;
7175         status = decode_sequence(xdr, &res->seq_res, rqstp);
7176         if (status)
7177                 goto out;
7178         status = decode_free_stateid(xdr, res);
7179 out:
7180         return status;
7181 }
7182 #endif /* CONFIG_NFS_V4_1 */
7183
7184 /**
7185  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7186  *                      the local page cache.
7187  * @xdr: XDR stream where entry resides
7188  * @entry: buffer to fill in with entry data
7189  * @plus: boolean indicating whether this should be a readdirplus entry
7190  *
7191  * Returns zero if successful, otherwise a negative errno value is
7192  * returned.
7193  *
7194  * This function is not invoked during READDIR reply decoding, but
7195  * rather whenever an application invokes the getdents(2) system call
7196  * on a directory already in our cache.
7197  */
7198 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7199                        int plus)
7200 {
7201         unsigned int savep;
7202         uint32_t bitmap[3] = {0};
7203         uint32_t len;
7204         __be32 *p = xdr_inline_decode(xdr, 4);
7205         if (unlikely(!p))
7206                 goto out_overflow;
7207         if (*p == xdr_zero) {
7208                 p = xdr_inline_decode(xdr, 4);
7209                 if (unlikely(!p))
7210                         goto out_overflow;
7211                 if (*p == xdr_zero)
7212                         return -EAGAIN;
7213                 entry->eof = 1;
7214                 return -EBADCOOKIE;
7215         }
7216
7217         p = xdr_inline_decode(xdr, 12);
7218         if (unlikely(!p))
7219                 goto out_overflow;
7220         entry->prev_cookie = entry->cookie;
7221         p = xdr_decode_hyper(p, &entry->cookie);
7222         entry->len = be32_to_cpup(p);
7223
7224         p = xdr_inline_decode(xdr, entry->len);
7225         if (unlikely(!p))
7226                 goto out_overflow;
7227         entry->name = (const char *) p;
7228
7229         /*
7230          * In case the server doesn't return an inode number,
7231          * we fake one here.  (We don't use inode number 0,
7232          * since glibc seems to choke on it...)
7233          */
7234         entry->ino = 1;
7235         entry->fattr->valid = 0;
7236
7237         if (decode_attr_bitmap(xdr, bitmap) < 0)
7238                 goto out_overflow;
7239
7240         if (decode_attr_length(xdr, &len, &savep) < 0)
7241                 goto out_overflow;
7242
7243         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7244                         NULL, entry->label, entry->server) < 0)
7245                 goto out_overflow;
7246         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7247                 entry->ino = entry->fattr->mounted_on_fileid;
7248         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7249                 entry->ino = entry->fattr->fileid;
7250
7251         entry->d_type = DT_UNKNOWN;
7252         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7253                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7254
7255         return 0;
7256
7257 out_overflow:
7258         print_overflow_msg(__func__, xdr);
7259         return -EAGAIN;
7260 }
7261
7262 /*
7263  * We need to translate between nfs status return values and
7264  * the local errno values which may not be the same.
7265  */
7266 static struct {
7267         int stat;
7268         int errno;
7269 } nfs_errtbl[] = {
7270         { NFS4_OK,              0               },
7271         { NFS4ERR_PERM,         -EPERM          },
7272         { NFS4ERR_NOENT,        -ENOENT         },
7273         { NFS4ERR_IO,           -errno_NFSERR_IO},
7274         { NFS4ERR_NXIO,         -ENXIO          },
7275         { NFS4ERR_ACCESS,       -EACCES         },
7276         { NFS4ERR_EXIST,        -EEXIST         },
7277         { NFS4ERR_XDEV,         -EXDEV          },
7278         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7279         { NFS4ERR_ISDIR,        -EISDIR         },
7280         { NFS4ERR_INVAL,        -EINVAL         },
7281         { NFS4ERR_FBIG,         -EFBIG          },
7282         { NFS4ERR_NOSPC,        -ENOSPC         },
7283         { NFS4ERR_ROFS,         -EROFS          },
7284         { NFS4ERR_MLINK,        -EMLINK         },
7285         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7286         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7287         { NFS4ERR_DQUOT,        -EDQUOT         },
7288         { NFS4ERR_STALE,        -ESTALE         },
7289         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7290         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7291         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7292         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7293         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7294         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7295         { NFS4ERR_LOCKED,       -EAGAIN         },
7296         { NFS4ERR_SYMLINK,      -ELOOP          },
7297         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7298         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7299         { -1,                   -EIO            }
7300 };
7301
7302 /*
7303  * Convert an NFS error code to a local one.
7304  * This one is used jointly by NFSv2 and NFSv3.
7305  */
7306 static int
7307 nfs4_stat_to_errno(int stat)
7308 {
7309         int i;
7310         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7311                 if (nfs_errtbl[i].stat == stat)
7312                         return nfs_errtbl[i].errno;
7313         }
7314         if (stat <= 10000 || stat > 10100) {
7315                 /* The server is looney tunes. */
7316                 return -EREMOTEIO;
7317         }
7318         /* If we cannot translate the error, the recovery routines should
7319          * handle it.
7320          * Note: remaining NFSv4 error codes have values > 10000, so should
7321          * not conflict with native Linux error codes.
7322          */
7323         return -stat;
7324 }
7325
7326 #ifdef CONFIG_NFS_V4_2
7327 #include "nfs42xdr.c"
7328 #endif /* CONFIG_NFS_V4_2 */
7329
7330 #define PROC(proc, argtype, restype)                            \
7331 [NFSPROC4_CLNT_##proc] = {                                      \
7332         .p_proc   = NFSPROC4_COMPOUND,                          \
7333         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7334         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7335         .p_arglen = NFS4_##argtype##_sz,                        \
7336         .p_replen = NFS4_##restype##_sz,                        \
7337         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7338         .p_name   = #proc,                                      \
7339 }
7340
7341 struct rpc_procinfo     nfs4_procedures[] = {
7342         PROC(READ,              enc_read,               dec_read),
7343         PROC(WRITE,             enc_write,              dec_write),
7344         PROC(COMMIT,            enc_commit,             dec_commit),
7345         PROC(OPEN,              enc_open,               dec_open),
7346         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7347         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7348         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7349         PROC(CLOSE,             enc_close,              dec_close),
7350         PROC(SETATTR,           enc_setattr,            dec_setattr),
7351         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7352         PROC(RENEW,             enc_renew,              dec_renew),
7353         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7354         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7355         PROC(LOCK,              enc_lock,               dec_lock),
7356         PROC(LOCKT,             enc_lockt,              dec_lockt),
7357         PROC(LOCKU,             enc_locku,              dec_locku),
7358         PROC(ACCESS,            enc_access,             dec_access),
7359         PROC(GETATTR,           enc_getattr,            dec_getattr),
7360         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7361         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7362         PROC(REMOVE,            enc_remove,             dec_remove),
7363         PROC(RENAME,            enc_rename,             dec_rename),
7364         PROC(LINK,              enc_link,               dec_link),
7365         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7366         PROC(CREATE,            enc_create,             dec_create),
7367         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7368         PROC(STATFS,            enc_statfs,             dec_statfs),
7369         PROC(READLINK,          enc_readlink,           dec_readlink),
7370         PROC(READDIR,           enc_readdir,            dec_readdir),
7371         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7372         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7373         PROC(GETACL,            enc_getacl,             dec_getacl),
7374         PROC(SETACL,            enc_setacl,             dec_setacl),
7375         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7376         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7377         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7378         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7379 #if defined(CONFIG_NFS_V4_1)
7380         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7381         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7382         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7383         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7384         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7385         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7386         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7387         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7388         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7389         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7390         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7391         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7392         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7393         PROC(BIND_CONN_TO_SESSION,
7394                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7395         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7396 #endif /* CONFIG_NFS_V4_1 */
7397 #ifdef CONFIG_NFS_V4_2
7398         PROC(SEEK,              enc_seek,               dec_seek),
7399         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7400         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7401 #endif /* CONFIG_NFS_V4_2 */
7402 };
7403
7404 const struct rpc_version nfs_version4 = {
7405         .number                 = 4,
7406         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7407         .procs                  = nfs4_procedures
7408 };
7409
7410 /*
7411  * Local variables:
7412  *  c-basic-offset: 8
7413  * End:
7414  */