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         if (seqid != NULL)
 950                 encode_uint32(xdr, seqid->sequence->counter);
 951         else
 952                 encode_uint32(xdr, 0);
 953 }
 954
 955 static void encode_compound_hdr(struct xdr_stream *xdr,
 956                                 struct rpc_rqst *req,
 957                                 struct compound_hdr *hdr)
 958 {
 959         __be32 *p;
 960         struct rpc_auth *auth = req->rq_cred->cr_auth;
 961
 962         /* initialize running count of expected bytes in reply.
 963          * NOTE: the replied tag SHOULD be the same is the one sent,
 964          * but this is not required as a MUST for the server to do so. */
 965         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 966
 967         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 968         encode_string(xdr, hdr->taglen, hdr->tag);
 969         p = reserve_space(xdr, 8);
 970         *p++ = cpu_to_be32(hdr->minorversion);
 971         hdr->nops_p = p;
 972         *p = cpu_to_be32(hdr->nops);
 973 }
 974
 975 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 976                 uint32_t replen,
 977                 struct compound_hdr *hdr)
 978 {
 979         encode_uint32(xdr, op);
 980         hdr->nops++;
 981         hdr->replen += replen;
 982 }
 983
 984 static void encode_nops(struct compound_hdr *hdr)
 985 {
 986         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 987         *hdr->nops_p = htonl(hdr->nops);
 988 }
 989
 990 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 991 {
 992         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 993 }
 994
 995 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 996 {
 997         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 998 }
 999
1000 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1001                                 const struct nfs4_label *label,
1002                                 const struct nfs_server *server)
1003 {
1004         char owner_name[IDMAP_NAMESZ];
1005         char owner_group[IDMAP_NAMESZ];
1006         int owner_namelen = 0;
1007         int owner_grouplen = 0;
1008         __be32 *p;
1009         unsigned i;
1010         uint32_t len = 0;
1011         uint32_t bmval_len;
1012         uint32_t bmval[3] = { 0 };
1013
1014         /*
1015          * We reserve enough space to write the entire attribute buffer at once.
1016          * In the worst-case, this would be
1017          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1018          * = 40 bytes, plus any contribution from variable-length fields
1019          *            such as owner/group.
1020          */
1021         if (iap->ia_valid & ATTR_SIZE) {
1022                 bmval[0] |= FATTR4_WORD0_SIZE;
1023                 len += 8;
1024         }
1025         if (iap->ia_valid & ATTR_MODE) {
1026                 bmval[1] |= FATTR4_WORD1_MODE;
1027                 len += 4;
1028         }
1029         if (iap->ia_valid & ATTR_UID) {
1030                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1031                 if (owner_namelen < 0) {
1032                         dprintk("nfs: couldn't resolve uid %d to string\n",
1033                                         from_kuid(&init_user_ns, iap->ia_uid));
1034                         /* XXX */
1035                         strcpy(owner_name, "nobody");
1036                         owner_namelen = sizeof("nobody") - 1;
1037                         /* goto out; */
1038                 }
1039                 bmval[1] |= FATTR4_WORD1_OWNER;
1040                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1041         }
1042         if (iap->ia_valid & ATTR_GID) {
1043                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1044                 if (owner_grouplen < 0) {
1045                         dprintk("nfs: couldn't resolve gid %d to string\n",
1046                                         from_kgid(&init_user_ns, iap->ia_gid));
1047                         strcpy(owner_group, "nobody");
1048                         owner_grouplen = sizeof("nobody") - 1;
1049                         /* goto out; */
1050                 }
1051                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1052                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 len += 16;
1057         } else if (iap->ia_valid & ATTR_ATIME) {
1058                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1059                 len += 4;
1060         }
1061         if (iap->ia_valid & ATTR_MTIME_SET) {
1062                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1063                 len += 16;
1064         } else if (iap->ia_valid & ATTR_MTIME) {
1065                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1066                 len += 4;
1067         }
1068         if (label) {
1069                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1070                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1071         }
1072
1073         if (bmval[2] != 0)
1074                 bmval_len = 3;
1075         else if (bmval[1] != 0)
1076                 bmval_len = 2;
1077         else
1078                 bmval_len = 1;
1079
1080         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1081
1082         *p++ = cpu_to_be32(bmval_len);
1083         for (i = 0; i < bmval_len; i++)
1084                 *p++ = cpu_to_be32(bmval[i]);
1085         *p++ = cpu_to_be32(len);
1086
1087         if (bmval[0] & FATTR4_WORD0_SIZE)
1088                 p = xdr_encode_hyper(p, iap->ia_size);
1089         if (bmval[1] & FATTR4_WORD1_MODE)
1090                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1091         if (bmval[1] & FATTR4_WORD1_OWNER)
1092                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1093         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1094                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1095         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1096                 if (iap->ia_valid & ATTR_ATIME_SET) {
1097                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1098                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1099                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1100                 } else
1101                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1102         }
1103         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1104                 if (iap->ia_valid & ATTR_MTIME_SET) {
1105                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1106                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1107                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1108                 } else
1109                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1110         }
1111         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1112                 *p++ = cpu_to_be32(label->lfs);
1113                 *p++ = cpu_to_be32(label->pi);
1114                 *p++ = cpu_to_be32(label->len);
1115                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1116         }
1117
1118 /* out: */
1119 }
1120
1121 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1122 {
1123         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1124         encode_uint32(xdr, access);
1125 }
1126
1127 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1128 {
1129         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1130         encode_nfs4_seqid(xdr, arg->seqid);
1131         encode_nfs4_stateid(xdr, &arg->stateid);
1132 }
1133
1134 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1135 {
1136         __be32 *p;
1137
1138         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1139         p = reserve_space(xdr, 12);
1140         p = xdr_encode_hyper(p, args->offset);
1141         *p = cpu_to_be32(args->count);
1142 }
1143
1144 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1149         encode_uint32(xdr, create->ftype);
1150
1151         switch (create->ftype) {
1152         case NF4LNK:
1153                 p = reserve_space(xdr, 4);
1154                 *p = cpu_to_be32(create->u.symlink.len);
1155                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1156                 break;
1157
1158         case NF4BLK: case NF4CHR:
1159                 p = reserve_space(xdr, 8);
1160                 *p++ = cpu_to_be32(create->u.device.specdata1);
1161                 *p = cpu_to_be32(create->u.device.specdata2);
1162                 break;
1163
1164         default:
1165                 break;
1166         }
1167
1168         encode_string(xdr, create->name->len, create->name->name);
1169         encode_attrs(xdr, create->attrs, create->label, create->server);
1170 }
1171
1172 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175
1176         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177         p = reserve_space(xdr, 8);
1178         *p++ = cpu_to_be32(1);
1179         *p = cpu_to_be32(bitmap);
1180 }
1181
1182 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1183 {
1184         __be32 *p;
1185
1186         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1187         p = reserve_space(xdr, 12);
1188         *p++ = cpu_to_be32(2);
1189         *p++ = cpu_to_be32(bm0);
1190         *p = cpu_to_be32(bm1);
1191 }
1192
1193 static void
1194 encode_getattr_three(struct xdr_stream *xdr,
1195                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1196                      struct compound_hdr *hdr)
1197 {
1198         __be32 *p;
1199
1200         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1201         if (bm2) {
1202                 p = reserve_space(xdr, 16);
1203                 *p++ = cpu_to_be32(3);
1204                 *p++ = cpu_to_be32(bm0);
1205                 *p++ = cpu_to_be32(bm1);
1206                 *p = cpu_to_be32(bm2);
1207         } else if (bm1) {
1208                 p = reserve_space(xdr, 12);
1209                 *p++ = cpu_to_be32(2);
1210                 *p++ = cpu_to_be32(bm0);
1211                 *p = cpu_to_be32(bm1);
1212         } else {
1213                 p = reserve_space(xdr, 8);
1214                 *p++ = cpu_to_be32(1);
1215                 *p = cpu_to_be32(bm0);
1216         }
1217 }
1218
1219 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1220 {
1221         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1222                            bitmask[1] & nfs4_fattr_bitmap[1],
1223                            bitmask[2] & nfs4_fattr_bitmap[2],
1224                            hdr);
1225 }
1226
1227 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1228                                  const u32 *open_bitmap,
1229                                  struct compound_hdr *hdr)
1230 {
1231         encode_getattr_three(xdr,
1232                              bitmask[0] & open_bitmap[0],
1233                              bitmask[1] & open_bitmap[1],
1234                              bitmask[2] & open_bitmap[2],
1235                              hdr);
1236 }
1237
1238 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1239 {
1240         encode_getattr_three(xdr,
1241                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1242                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1243                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1244                              hdr);
1245 }
1246
1247 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1248 {
1249         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1250                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1251 }
1252
1253 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1254 {
1255         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1256 }
1257
1258 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1259 {
1260         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1261         encode_string(xdr, name->len, name->name);
1262 }
1263
1264 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1265 {
1266         if (fl->fl_type == F_RDLCK)
1267                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1268         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1269 }
1270
1271 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1272 {
1273         if (fl->fl_end == OFFSET_MAX)
1274                 return ~(uint64_t)0;
1275         return fl->fl_end - fl->fl_start + 1;
1276 }
1277
1278 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1279 {
1280         __be32 *p;
1281
1282         p = reserve_space(xdr, 32);
1283         p = xdr_encode_hyper(p, lowner->clientid);
1284         *p++ = cpu_to_be32(20);
1285         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1286         *p++ = cpu_to_be32(lowner->s_dev);
1287         xdr_encode_hyper(p, lowner->id);
1288 }
1289
1290 /*
1291  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1292  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1293  */
1294 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1295 {
1296         __be32 *p;
1297
1298         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1299         p = reserve_space(xdr, 28);
1300         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1301         *p++ = cpu_to_be32(args->reclaim);
1302         p = xdr_encode_hyper(p, args->fl->fl_start);
1303         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1304         *p = cpu_to_be32(args->new_lock_owner);
1305         if (args->new_lock_owner){
1306                 encode_nfs4_seqid(xdr, args->open_seqid);
1307                 encode_nfs4_stateid(xdr, args->open_stateid);
1308                 encode_nfs4_seqid(xdr, args->lock_seqid);
1309                 encode_lockowner(xdr, &args->lock_owner);
1310         }
1311         else {
1312                 encode_nfs4_stateid(xdr, args->lock_stateid);
1313                 encode_nfs4_seqid(xdr, args->lock_seqid);
1314         }
1315 }
1316
1317 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1318 {
1319         __be32 *p;
1320
1321         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1322         p = reserve_space(xdr, 20);
1323         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1324         p = xdr_encode_hyper(p, args->fl->fl_start);
1325         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1326         encode_lockowner(xdr, &args->lock_owner);
1327 }
1328
1329 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1330 {
1331         __be32 *p;
1332
1333         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1334         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1335         encode_nfs4_seqid(xdr, args->seqid);
1336         encode_nfs4_stateid(xdr, args->stateid);
1337         p = reserve_space(xdr, 16);
1338         p = xdr_encode_hyper(p, args->fl->fl_start);
1339         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1340 }
1341
1342 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1343 {
1344         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1345         encode_lockowner(xdr, lowner);
1346 }
1347
1348 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1349 {
1350         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1351         encode_string(xdr, name->len, name->name);
1352 }
1353
1354 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1355 {
1356         __be32 *p;
1357
1358         p = reserve_space(xdr, 8);
1359         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1360         case FMODE_READ:
1361                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1362                 break;
1363         case FMODE_WRITE:
1364                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1365                 break;
1366         case FMODE_READ|FMODE_WRITE:
1367                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1368                 break;
1369         default:
1370                 *p++ = cpu_to_be32(0);
1371         }
1372         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1373 }
1374
1375 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1376 {
1377         __be32 *p;
1378  /*
1379  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1380  * owner 4 = 32
1381  */
1382         encode_nfs4_seqid(xdr, arg->seqid);
1383         encode_share_access(xdr, arg->fmode);
1384         p = reserve_space(xdr, 36);
1385         p = xdr_encode_hyper(p, arg->clientid);
1386         *p++ = cpu_to_be32(24);
1387         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1388         *p++ = cpu_to_be32(arg->server->s_dev);
1389         *p++ = cpu_to_be32(arg->id.uniquifier);
1390         xdr_encode_hyper(p, arg->id.create_time);
1391 }
1392
1393 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1394 {
1395         struct iattr dummy;
1396         __be32 *p;
1397
1398         p = reserve_space(xdr, 4);
1399         switch(arg->createmode) {
1400         case NFS4_CREATE_UNCHECKED:
1401                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1402                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1403                 break;
1404         case NFS4_CREATE_GUARDED:
1405                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1406                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1407                 break;
1408         case NFS4_CREATE_EXCLUSIVE:
1409                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1410                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1411                 break;
1412         case NFS4_CREATE_EXCLUSIVE4_1:
1413                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1414                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415                 dummy.ia_valid = 0;
1416                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1417         }
1418 }
1419
1420 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1421 {
1422         __be32 *p;
1423
1424         p = reserve_space(xdr, 4);
1425         switch (arg->open_flags & O_CREAT) {
1426         case 0:
1427                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1428                 break;
1429         default:
1430                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1431                 encode_createmode(xdr, arg);
1432         }
1433 }
1434
1435 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1436 {
1437         __be32 *p;
1438
1439         p = reserve_space(xdr, 4);
1440         switch (delegation_type) {
1441         case 0:
1442                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1443                 break;
1444         case FMODE_READ:
1445                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1446                 break;
1447         case FMODE_WRITE|FMODE_READ:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1449                 break;
1450         default:
1451                 BUG();
1452         }
1453 }
1454
1455 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1456 {
1457         __be32 *p;
1458
1459         p = reserve_space(xdr, 4);
1460         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1461         encode_string(xdr, name->len, name->name);
1462 }
1463
1464 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1465 {
1466         __be32 *p;
1467
1468         p = reserve_space(xdr, 4);
1469         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1470         encode_delegation_type(xdr, type);
1471 }
1472
1473 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1474 {
1475         __be32 *p;
1476
1477         p = reserve_space(xdr, 4);
1478         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1479         encode_nfs4_stateid(xdr, stateid);
1480         encode_string(xdr, name->len, name->name);
1481 }
1482
1483 static inline void encode_claim_fh(struct xdr_stream *xdr)
1484 {
1485         __be32 *p;
1486
1487         p = reserve_space(xdr, 4);
1488         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1489 }
1490
1491 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 4);
1496         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1497         encode_nfs4_stateid(xdr, stateid);
1498 }
1499
1500 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1501 {
1502         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1503         encode_openhdr(xdr, arg);
1504         encode_opentype(xdr, arg);
1505         switch (arg->claim) {
1506         case NFS4_OPEN_CLAIM_NULL:
1507                 encode_claim_null(xdr, arg->name);
1508                 break;
1509         case NFS4_OPEN_CLAIM_PREVIOUS:
1510                 encode_claim_previous(xdr, arg->u.delegation_type);
1511                 break;
1512         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1513                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1514                 break;
1515         case NFS4_OPEN_CLAIM_FH:
1516                 encode_claim_fh(xdr);
1517                 break;
1518         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1519                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1520                 break;
1521         default:
1522                 BUG();
1523         }
1524 }
1525
1526 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1527 {
1528         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1529         encode_nfs4_stateid(xdr, arg->stateid);
1530         encode_nfs4_seqid(xdr, arg->seqid);
1531 }
1532
1533 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1534 {
1535         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1536         encode_nfs4_stateid(xdr, &arg->stateid);
1537         encode_nfs4_seqid(xdr, arg->seqid);
1538         encode_share_access(xdr, arg->fmode);
1539 }
1540
1541 static void
1542 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1543 {
1544         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1545         encode_string(xdr, fh->size, fh->data);
1546 }
1547
1548 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1551 }
1552
1553 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1554                         struct compound_hdr *hdr)
1555 {
1556         __be32 *p;
1557
1558         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1559         encode_nfs4_stateid(xdr, &args->stateid);
1560
1561         p = reserve_space(xdr, 12);
1562         p = xdr_encode_hyper(p, args->offset);
1563         *p = cpu_to_be32(args->count);
1564 }
1565
1566 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1567 {
1568         uint32_t attrs[3] = {
1569                 FATTR4_WORD0_RDATTR_ERROR,
1570                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1571         };
1572         uint32_t dircount = readdir->count >> 1;
1573         __be32 *p, verf[2];
1574         uint32_t attrlen = 0;
1575         unsigned int i;
1576
1577         if (readdir->plus) {
1578                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1579                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1580                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1581                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1582                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1583                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1584                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1585                 dircount >>= 1;
1586         }
1587         /* Use mounted_on_fileid only if the server supports it */
1588         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1589                 attrs[0] |= FATTR4_WORD0_FILEID;
1590         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1591                 attrs[i] &= readdir->bitmask[i];
1592                 if (attrs[i] != 0)
1593                         attrlen = i+1;
1594         }
1595
1596         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1597         encode_uint64(xdr, readdir->cookie);
1598         encode_nfs4_verifier(xdr, &readdir->verifier);
1599         p = reserve_space(xdr, 12 + (attrlen << 2));
1600         *p++ = cpu_to_be32(dircount);
1601         *p++ = cpu_to_be32(readdir->count);
1602         *p++ = cpu_to_be32(attrlen);
1603         for (i = 0; i < attrlen; i++)
1604                 *p++ = cpu_to_be32(attrs[i]);
1605         memcpy(verf, readdir->verifier.data, sizeof(verf));
1606
1607         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1608                         __func__,
1609                         (unsigned long long)readdir->cookie,
1610                         verf[0], verf[1],
1611                         attrs[0] & readdir->bitmask[0],
1612                         attrs[1] & readdir->bitmask[1],
1613                         attrs[2] & readdir->bitmask[2]);
1614 }
1615
1616 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1617 {
1618         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1619 }
1620
1621 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1622 {
1623         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1624         encode_string(xdr, name->len, name->name);
1625 }
1626
1627 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1628 {
1629         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1630         encode_string(xdr, oldname->len, oldname->name);
1631         encode_string(xdr, newname->len, newname->name);
1632 }
1633
1634 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1635                          struct compound_hdr *hdr)
1636 {
1637         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1638         encode_uint64(xdr, clid);
1639 }
1640
1641 static void
1642 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1643 {
1644         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1645 }
1646
1647 static void
1648 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1649 {
1650         __be32 *p;
1651
1652         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1653         encode_nfs4_stateid(xdr, &zero_stateid);
1654         p = reserve_space(xdr, 2*4);
1655         *p++ = cpu_to_be32(1);
1656         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1657         p = reserve_space(xdr, 4);
1658         *p = cpu_to_be32(arg->acl_len);
1659         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660 }
1661
1662 static void
1663 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1664 {
1665         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1666 }
1667
1668 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1669 {
1670         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1671         encode_nfs4_stateid(xdr, &arg->stateid);
1672         encode_attrs(xdr, arg->iap, arg->label, server);
1673 }
1674
1675 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1680         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1681
1682         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1683         p = reserve_space(xdr, 4);
1684         *p = cpu_to_be32(setclientid->sc_prog);
1685         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1686         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1687         p = reserve_space(xdr, 4);
1688         *p = cpu_to_be32(setclientid->sc_cb_ident);
1689 }
1690
1691 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1692 {
1693         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1694                         decode_setclientid_confirm_maxsz, hdr);
1695         encode_uint64(xdr, arg->clientid);
1696         encode_nfs4_verifier(xdr, &arg->confirm);
1697 }
1698
1699 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1700                          struct compound_hdr *hdr)
1701 {
1702         __be32 *p;
1703
1704         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1705         encode_nfs4_stateid(xdr, &args->stateid);
1706
1707         p = reserve_space(xdr, 16);
1708         p = xdr_encode_hyper(p, args->offset);
1709         *p++ = cpu_to_be32(args->stable);
1710         *p = cpu_to_be32(args->count);
1711
1712         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1713 }
1714
1715 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1716 {
1717         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1718         encode_nfs4_stateid(xdr, stateid);
1719 }
1720
1721 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1722 {
1723         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1724         encode_string(xdr, name->len, name->name);
1725 }
1726
1727 #if defined(CONFIG_NFS_V4_1)
1728 /* NFSv4.1 operations */
1729 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1730                                    struct nfs4_session *session,
1731                                    struct compound_hdr *hdr)
1732 {
1733         __be32 *p;
1734
1735         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1736                 decode_bind_conn_to_session_maxsz, hdr);
1737         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1738         p = xdr_reserve_space(xdr, 8);
1739         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1740         *p = 0; /* use_conn_in_rdma_mode = False */
1741 }
1742
1743 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1744 {
1745         unsigned int i;
1746         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1747         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1748                 encode_uint32(xdr, op_map->u.words[i]);
1749 }
1750
1751 static void encode_exchange_id(struct xdr_stream *xdr,
1752                                struct nfs41_exchange_id_args *args,
1753                                struct compound_hdr *hdr)
1754 {
1755         __be32 *p;
1756         char impl_name[IMPL_NAME_LIMIT];
1757         int len = 0;
1758
1759         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1760         encode_nfs4_verifier(xdr, args->verifier);
1761
1762         encode_string(xdr, args->id_len, args->id);
1763
1764         encode_uint32(xdr, args->flags);
1765         encode_uint32(xdr, args->state_protect.how);
1766
1767         switch (args->state_protect.how) {
1768         case SP4_NONE:
1769                 break;
1770         case SP4_MACH_CRED:
1771                 encode_op_map(xdr, &args->state_protect.enforce);
1772                 encode_op_map(xdr, &args->state_protect.allow);
1773                 break;
1774         default:
1775                 WARN_ON_ONCE(1);
1776                 break;
1777         }
1778
1779         if (send_implementation_id &&
1780             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1781             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1782                 <= sizeof(impl_name) + 1)
1783                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1784                                utsname()->sysname, utsname()->release,
1785                                utsname()->version, utsname()->machine);
1786
1787         if (len > 0) {
1788                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1789
1790                 encode_string(xdr,
1791                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1792                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1793                 encode_string(xdr, len, impl_name);
1794                 /* just send zeros for nii_date - the date is in nii_name */
1795                 p = reserve_space(xdr, 12);
1796                 p = xdr_encode_hyper(p, 0);
1797                 *p = cpu_to_be32(0);
1798         } else
1799                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1800 }
1801
1802 static void encode_create_session(struct xdr_stream *xdr,
1803                                   struct nfs41_create_session_args *args,
1804                                   struct compound_hdr *hdr)
1805 {
1806         __be32 *p;
1807         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1808         uint32_t len;
1809         struct nfs_client *clp = args->client;
1810         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1811         u32 max_resp_sz_cached;
1812
1813         /*
1814          * Assumes OPEN is the biggest non-idempotent compound.
1815          * 2 is the verifier.
1816          */
1817         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1818                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1819
1820         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1821                         clp->cl_ipaddr);
1822
1823         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1824         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1825         p = xdr_encode_hyper(p, clp->cl_clientid);
1826         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1827         *p++ = cpu_to_be32(args->flags);                        /*flags */
1828
1829         /* Fore Channel */
1830         *p++ = cpu_to_be32(0);                          /* header padding size */
1831         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1832         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1833         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1834         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1835         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1836         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1837
1838         /* Back Channel */
1839         *p++ = cpu_to_be32(0);                          /* header padding size */
1840         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1841         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1842         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1843         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1844         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1845         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1846
1847         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1848         *p++ = cpu_to_be32(1);
1849         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1850
1851         /* authsys_parms rfc1831 */
1852         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1853         p = xdr_encode_opaque(p, machine_name, len);
1854         *p++ = cpu_to_be32(0);                          /* UID */
1855         *p++ = cpu_to_be32(0);                          /* GID */
1856         *p = cpu_to_be32(0);                            /* No more gids */
1857 }
1858
1859 static void encode_destroy_session(struct xdr_stream *xdr,
1860                                    struct nfs4_session *session,
1861                                    struct compound_hdr *hdr)
1862 {
1863         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1864         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865 }
1866
1867 static void encode_destroy_clientid(struct xdr_stream *xdr,
1868                                    uint64_t clientid,
1869                                    struct compound_hdr *hdr)
1870 {
1871         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1872         encode_uint64(xdr, clientid);
1873 }
1874
1875 static void encode_reclaim_complete(struct xdr_stream *xdr,
1876                                     struct nfs41_reclaim_complete_args *args,
1877                                     struct compound_hdr *hdr)
1878 {
1879         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1880         encode_uint32(xdr, args->one_fs);
1881 }
1882 #endif /* CONFIG_NFS_V4_1 */
1883
1884 static void encode_sequence(struct xdr_stream *xdr,
1885                             const struct nfs4_sequence_args *args,
1886                             struct compound_hdr *hdr)
1887 {
1888 #if defined(CONFIG_NFS_V4_1)
1889         struct nfs4_session *session;
1890         struct nfs4_slot_table *tp;
1891         struct nfs4_slot *slot = args->sa_slot;
1892         __be32 *p;
1893
1894         tp = slot->table;
1895         session = tp->session;
1896         if (!session)
1897                 return;
1898
1899         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1900
1901         /*
1902          * Sessionid + seqid + slotid + max slotid + cache_this
1903          */
1904         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1905                 "max_slotid=%d cache_this=%d\n",
1906                 __func__,
1907                 ((u32 *)session->sess_id.data)[0],
1908                 ((u32 *)session->sess_id.data)[1],
1909                 ((u32 *)session->sess_id.data)[2],
1910                 ((u32 *)session->sess_id.data)[3],
1911                 slot->seq_nr, slot->slot_nr,
1912                 tp->highest_used_slotid, args->sa_cache_this);
1913         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1914         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1915         *p++ = cpu_to_be32(slot->seq_nr);
1916         *p++ = cpu_to_be32(slot->slot_nr);
1917         *p++ = cpu_to_be32(tp->highest_used_slotid);
1918         *p = cpu_to_be32(args->sa_cache_this);
1919 #endif /* CONFIG_NFS_V4_1 */
1920 }
1921
1922 #ifdef CONFIG_NFS_V4_1
1923 static void
1924 encode_getdeviceinfo(struct xdr_stream *xdr,
1925                      const struct nfs4_getdeviceinfo_args *args,
1926                      struct compound_hdr *hdr)
1927 {
1928         __be32 *p;
1929
1930         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1931         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1932         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1933                                     NFS4_DEVICEID4_SIZE);
1934         *p++ = cpu_to_be32(args->pdev->layout_type);
1935         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1936
1937         p = reserve_space(xdr, 4 + 4);
1938         *p++ = cpu_to_be32(1);                  /* bitmap length */
1939         *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1940 }
1941
1942 static void
1943 encode_layoutget(struct xdr_stream *xdr,
1944                       const struct nfs4_layoutget_args *args,
1945                       struct compound_hdr *hdr)
1946 {
1947         __be32 *p;
1948
1949         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1950         p = reserve_space(xdr, 36);
1951         *p++ = cpu_to_be32(0);     /* Signal layout available */
1952         *p++ = cpu_to_be32(args->type);
1953         *p++ = cpu_to_be32(args->range.iomode);
1954         p = xdr_encode_hyper(p, args->range.offset);
1955         p = xdr_encode_hyper(p, args->range.length);
1956         p = xdr_encode_hyper(p, args->minlength);
1957         encode_nfs4_stateid(xdr, &args->stateid);
1958         encode_uint32(xdr, args->maxcount);
1959
1960         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1961                 __func__,
1962                 args->type,
1963                 args->range.iomode,
1964                 (unsigned long)args->range.offset,
1965                 (unsigned long)args->range.length,
1966                 args->maxcount);
1967 }
1968
1969 static int
1970 encode_layoutcommit(struct xdr_stream *xdr,
1971                     struct inode *inode,
1972                     struct nfs4_layoutcommit_args *args,
1973                     struct compound_hdr *hdr)
1974 {
1975         __be32 *p;
1976
1977         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1978                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1979
1980         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1981         p = reserve_space(xdr, 20);
1982         /* Only whole file layouts */
1983         p = xdr_encode_hyper(p, 0); /* offset */
1984         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1985         *p = cpu_to_be32(0); /* reclaim */
1986         encode_nfs4_stateid(xdr, &args->stateid);
1987         p = reserve_space(xdr, 20);
1988         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1989         p = xdr_encode_hyper(p, args->lastbytewritten);
1990         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1991         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1992
1993         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1994                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1995                         NFS_I(inode)->layout, xdr, args);
1996         } else {
1997                 encode_uint32(xdr, args->layoutupdate_len);
1998                 if (args->layoutupdate_pages) {
1999                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2000                                         args->layoutupdate_len);
2001                 }
2002         }
2003
2004         return 0;
2005 }
2006
2007 static void
2008 encode_layoutreturn(struct xdr_stream *xdr,
2009                     const struct nfs4_layoutreturn_args *args,
2010                     struct compound_hdr *hdr)
2011 {
2012         __be32 *p;
2013
2014         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2015         p = reserve_space(xdr, 16);
2016         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2017         *p++ = cpu_to_be32(args->layout_type);
2018         *p++ = cpu_to_be32(IOMODE_ANY);
2019         *p = cpu_to_be32(RETURN_FILE);
2020         p = reserve_space(xdr, 16);
2021         p = xdr_encode_hyper(p, 0);
2022         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2023         spin_lock(&args->inode->i_lock);
2024         encode_nfs4_stateid(xdr, &args->stateid);
2025         spin_unlock(&args->inode->i_lock);
2026         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2027                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2028                         NFS_I(args->inode)->layout, xdr, args);
2029         } else
2030                 encode_uint32(xdr, 0);
2031 }
2032
2033 static int
2034 encode_secinfo_no_name(struct xdr_stream *xdr,
2035                        const struct nfs41_secinfo_no_name_args *args,
2036                        struct compound_hdr *hdr)
2037 {
2038         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2039         encode_uint32(xdr, args->style);
2040         return 0;
2041 }
2042
2043 static void encode_test_stateid(struct xdr_stream *xdr,
2044                                 struct nfs41_test_stateid_args *args,
2045                                 struct compound_hdr *hdr)
2046 {
2047         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2048         encode_uint32(xdr, 1);
2049         encode_nfs4_stateid(xdr, args->stateid);
2050 }
2051
2052 static void encode_free_stateid(struct xdr_stream *xdr,
2053                                 struct nfs41_free_stateid_args *args,
2054                                 struct compound_hdr *hdr)
2055 {
2056         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057         encode_nfs4_stateid(xdr, &args->stateid);
2058 }
2059 #endif /* CONFIG_NFS_V4_1 */
2060
2061 /*
2062  * END OF "GENERIC" ENCODE ROUTINES.
2063  */
2064
2065 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2066 {
2067 #if defined(CONFIG_NFS_V4_1)
2068         struct nfs4_session *session = args->sa_slot->table->session;
2069         if (session)
2070                 return session->clp->cl_mvops->minor_version;
2071 #endif /* CONFIG_NFS_V4_1 */
2072         return 0;
2073 }
2074
2075 /*
2076  * Encode an ACCESS request
2077  */
2078 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2079                                 const struct nfs4_accessargs *args)
2080 {
2081         struct compound_hdr hdr = {
2082                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083         };
2084
2085         encode_compound_hdr(xdr, req, &hdr);
2086         encode_sequence(xdr, &args->seq_args, &hdr);
2087         encode_putfh(xdr, args->fh, &hdr);
2088         encode_access(xdr, args->access, &hdr);
2089         encode_getfattr(xdr, args->bitmask, &hdr);
2090         encode_nops(&hdr);
2091 }
2092
2093 /*
2094  * Encode LOOKUP request
2095  */
2096 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2097                                 const struct nfs4_lookup_arg *args)
2098 {
2099         struct compound_hdr hdr = {
2100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101         };
2102
2103         encode_compound_hdr(xdr, req, &hdr);
2104         encode_sequence(xdr, &args->seq_args, &hdr);
2105         encode_putfh(xdr, args->dir_fh, &hdr);
2106         encode_lookup(xdr, args->name, &hdr);
2107         encode_getfh(xdr, &hdr);
2108         encode_getfattr(xdr, args->bitmask, &hdr);
2109         encode_nops(&hdr);
2110 }
2111
2112 /*
2113  * Encode LOOKUP_ROOT request
2114  */
2115 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2116                                      struct xdr_stream *xdr,
2117                                      const struct nfs4_lookup_root_arg *args)
2118 {
2119         struct compound_hdr hdr = {
2120                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121         };
2122
2123         encode_compound_hdr(xdr, req, &hdr);
2124         encode_sequence(xdr, &args->seq_args, &hdr);
2125         encode_putrootfh(xdr, &hdr);
2126         encode_getfh(xdr, &hdr);
2127         encode_getfattr(xdr, args->bitmask, &hdr);
2128         encode_nops(&hdr);
2129 }
2130
2131 /*
2132  * Encode REMOVE request
2133  */
2134 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2135                                 const struct nfs_removeargs *args)
2136 {
2137         struct compound_hdr hdr = {
2138                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139         };
2140
2141         encode_compound_hdr(xdr, req, &hdr);
2142         encode_sequence(xdr, &args->seq_args, &hdr);
2143         encode_putfh(xdr, args->fh, &hdr);
2144         encode_remove(xdr, &args->name, &hdr);
2145         encode_nops(&hdr);
2146 }
2147
2148 /*
2149  * Encode RENAME request
2150  */
2151 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                 const struct nfs_renameargs *args)
2153 {
2154         struct compound_hdr hdr = {
2155                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156         };
2157
2158         encode_compound_hdr(xdr, req, &hdr);
2159         encode_sequence(xdr, &args->seq_args, &hdr);
2160         encode_putfh(xdr, args->old_dir, &hdr);
2161         encode_savefh(xdr, &hdr);
2162         encode_putfh(xdr, args->new_dir, &hdr);
2163         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164         encode_nops(&hdr);
2165 }
2166
2167 /*
2168  * Encode LINK request
2169  */
2170 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2171                              const struct nfs4_link_arg *args)
2172 {
2173         struct compound_hdr hdr = {
2174                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175         };
2176
2177         encode_compound_hdr(xdr, req, &hdr);
2178         encode_sequence(xdr, &args->seq_args, &hdr);
2179         encode_putfh(xdr, args->fh, &hdr);
2180         encode_savefh(xdr, &hdr);
2181         encode_putfh(xdr, args->dir_fh, &hdr);
2182         encode_link(xdr, args->name, &hdr);
2183         encode_restorefh(xdr, &hdr);
2184         encode_getfattr(xdr, args->bitmask, &hdr);
2185         encode_nops(&hdr);
2186 }
2187
2188 /*
2189  * Encode CREATE request
2190  */
2191 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2192                                 const struct nfs4_create_arg *args)
2193 {
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         encode_compound_hdr(xdr, req, &hdr);
2199         encode_sequence(xdr, &args->seq_args, &hdr);
2200         encode_putfh(xdr, args->dir_fh, &hdr);
2201         encode_create(xdr, args, &hdr);
2202         encode_getfh(xdr, &hdr);
2203         encode_getfattr(xdr, args->bitmask, &hdr);
2204         encode_nops(&hdr);
2205 }
2206
2207 /*
2208  * Encode SYMLINK request
2209  */
2210 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                                  const struct nfs4_create_arg *args)
2212 {
2213         nfs4_xdr_enc_create(req, xdr, args);
2214 }
2215
2216 /*
2217  * Encode GETATTR request
2218  */
2219 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2220                                  const struct nfs4_getattr_arg *args)
2221 {
2222         struct compound_hdr hdr = {
2223                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224         };
2225
2226         encode_compound_hdr(xdr, req, &hdr);
2227         encode_sequence(xdr, &args->seq_args, &hdr);
2228         encode_putfh(xdr, args->fh, &hdr);
2229         encode_getfattr(xdr, args->bitmask, &hdr);
2230         encode_nops(&hdr);
2231 }
2232
2233 /*
2234  * Encode a CLOSE request
2235  */
2236 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2237                                struct nfs_closeargs *args)
2238 {
2239         struct compound_hdr hdr = {
2240                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_sequence(xdr, &args->seq_args, &hdr);
2245         encode_putfh(xdr, args->fh, &hdr);
2246         encode_close(xdr, args, &hdr);
2247         encode_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode an OPEN request
2253  */
2254 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                               struct nfs_openargs *args)
2256 {
2257         struct compound_hdr hdr = {
2258                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259         };
2260
2261         encode_compound_hdr(xdr, req, &hdr);
2262         encode_sequence(xdr, &args->seq_args, &hdr);
2263         encode_putfh(xdr, args->fh, &hdr);
2264         encode_open(xdr, args, &hdr);
2265         encode_getfh(xdr, &hdr);
2266         if (args->access)
2267                 encode_access(xdr, args->access, &hdr);
2268         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269         encode_nops(&hdr);
2270 }
2271
2272 /*
2273  * Encode an OPEN_CONFIRM request
2274  */
2275 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2276                                       struct xdr_stream *xdr,
2277                                       struct nfs_open_confirmargs *args)
2278 {
2279         struct compound_hdr hdr = {
2280                 .nops   = 0,
2281         };
2282
2283         encode_compound_hdr(xdr, req, &hdr);
2284         encode_putfh(xdr, args->fh, &hdr);
2285         encode_open_confirm(xdr, args, &hdr);
2286         encode_nops(&hdr);
2287 }
2288
2289 /*
2290  * Encode an OPEN request with no attributes.
2291  */
2292 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2293                                      struct xdr_stream *xdr,
2294                                      struct nfs_openargs *args)
2295 {
2296         struct compound_hdr hdr = {
2297                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298         };
2299
2300         encode_compound_hdr(xdr, req, &hdr);
2301         encode_sequence(xdr, &args->seq_args, &hdr);
2302         encode_putfh(xdr, args->fh, &hdr);
2303         encode_open(xdr, args, &hdr);
2304         if (args->access)
2305                 encode_access(xdr, args->access, &hdr);
2306         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307         encode_nops(&hdr);
2308 }
2309
2310 /*
2311  * Encode an OPEN_DOWNGRADE request
2312  */
2313 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2314                                         struct xdr_stream *xdr,
2315                                         struct nfs_closeargs *args)
2316 {
2317         struct compound_hdr hdr = {
2318                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319         };
2320
2321         encode_compound_hdr(xdr, req, &hdr);
2322         encode_sequence(xdr, &args->seq_args, &hdr);
2323         encode_putfh(xdr, args->fh, &hdr);
2324         encode_open_downgrade(xdr, args, &hdr);
2325         encode_getfattr(xdr, args->bitmask, &hdr);
2326         encode_nops(&hdr);
2327 }
2328
2329 /*
2330  * Encode a LOCK request
2331  */
2332 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2333                               struct nfs_lock_args *args)
2334 {
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         encode_compound_hdr(xdr, req, &hdr);
2340         encode_sequence(xdr, &args->seq_args, &hdr);
2341         encode_putfh(xdr, args->fh, &hdr);
2342         encode_lock(xdr, args, &hdr);
2343         encode_nops(&hdr);
2344 }
2345
2346 /*
2347  * Encode a LOCKT request
2348  */
2349 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2350                                struct nfs_lockt_args *args)
2351 {
2352         struct compound_hdr hdr = {
2353                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354         };
2355
2356         encode_compound_hdr(xdr, req, &hdr);
2357         encode_sequence(xdr, &args->seq_args, &hdr);
2358         encode_putfh(xdr, args->fh, &hdr);
2359         encode_lockt(xdr, args, &hdr);
2360         encode_nops(&hdr);
2361 }
2362
2363 /*
2364  * Encode a LOCKU request
2365  */
2366 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2367                                struct nfs_locku_args *args)
2368 {
2369         struct compound_hdr hdr = {
2370                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371         };
2372
2373         encode_compound_hdr(xdr, req, &hdr);
2374         encode_sequence(xdr, &args->seq_args, &hdr);
2375         encode_putfh(xdr, args->fh, &hdr);
2376         encode_locku(xdr, args, &hdr);
2377         encode_nops(&hdr);
2378 }
2379
2380 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2381                                            struct xdr_stream *xdr,
2382                                         struct nfs_release_lockowner_args *args)
2383 {
2384         struct compound_hdr hdr = {
2385                 .minorversion = 0,
2386         };
2387
2388         encode_compound_hdr(xdr, req, &hdr);
2389         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390         encode_nops(&hdr);
2391 }
2392
2393 /*
2394  * Encode a READLINK request
2395  */
2396 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2397                                   const struct nfs4_readlink *args)
2398 {
2399         struct compound_hdr hdr = {
2400                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401         };
2402
2403         encode_compound_hdr(xdr, req, &hdr);
2404         encode_sequence(xdr, &args->seq_args, &hdr);
2405         encode_putfh(xdr, args->fh, &hdr);
2406         encode_readlink(xdr, args, req, &hdr);
2407
2408         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409                         args->pgbase, args->pglen);
2410         encode_nops(&hdr);
2411 }
2412
2413 /*
2414  * Encode a READDIR request
2415  */
2416 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2417                                  const struct nfs4_readdir_arg *args)
2418 {
2419         struct compound_hdr hdr = {
2420                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2421         };
2422
2423         encode_compound_hdr(xdr, req, &hdr);
2424         encode_sequence(xdr, &args->seq_args, &hdr);
2425         encode_putfh(xdr, args->fh, &hdr);
2426         encode_readdir(xdr, args, req, &hdr);
2427
2428         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429                          args->pgbase, args->count);
2430         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431                         __func__, hdr.replen << 2, args->pages,
2432                         args->pgbase, args->count);
2433         encode_nops(&hdr);
2434 }
2435
2436 /*
2437  * Encode a READ request
2438  */
2439 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                               struct nfs_pgio_args *args)
2441 {
2442         struct compound_hdr hdr = {
2443                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444         };
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         encode_read(xdr, args, &hdr);
2450
2451         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2452                          args->pages, args->pgbase, args->count);
2453         req->rq_rcv_buf.flags |= XDRBUF_READ;
2454         encode_nops(&hdr);
2455 }
2456
2457 /*
2458  * Encode an SETATTR request
2459  */
2460 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2461                                  struct nfs_setattrargs *args)
2462 {
2463         struct compound_hdr hdr = {
2464                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465         };
2466
2467         encode_compound_hdr(xdr, req, &hdr);
2468         encode_sequence(xdr, &args->seq_args, &hdr);
2469         encode_putfh(xdr, args->fh, &hdr);
2470         encode_setattr(xdr, args, args->server, &hdr);
2471         encode_getfattr(xdr, args->bitmask, &hdr);
2472         encode_nops(&hdr);
2473 }
2474
2475 /*
2476  * Encode a GETACL request
2477  */
2478 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2479                                 struct nfs_getaclargs *args)
2480 {
2481         struct compound_hdr hdr = {
2482                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483         };
2484         uint32_t replen;
2485
2486         encode_compound_hdr(xdr, req, &hdr);
2487         encode_sequence(xdr, &args->seq_args, &hdr);
2488         encode_putfh(xdr, args->fh, &hdr);
2489         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491
2492         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493                 args->acl_pages, args->acl_pgbase, args->acl_len);
2494
2495         encode_nops(&hdr);
2496 }
2497
2498 /*
2499  * Encode a WRITE request
2500  */
2501 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2502                                struct nfs_pgio_args *args)
2503 {
2504         struct compound_hdr hdr = {
2505                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_sequence(xdr, &args->seq_args, &hdr);
2510         encode_putfh(xdr, args->fh, &hdr);
2511         encode_write(xdr, args, &hdr);
2512         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513         if (args->bitmask)
2514                 encode_getfattr(xdr, args->bitmask, &hdr);
2515         encode_nops(&hdr);
2516 }
2517
2518 /*
2519  *  a COMMIT request
2520  */
2521 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                 struct nfs_commitargs *args)
2523 {
2524         struct compound_hdr hdr = {
2525                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2526         };
2527
2528         encode_compound_hdr(xdr, req, &hdr);
2529         encode_sequence(xdr, &args->seq_args, &hdr);
2530         encode_putfh(xdr, args->fh, &hdr);
2531         encode_commit(xdr, args, &hdr);
2532         encode_nops(&hdr);
2533 }
2534
2535 /*
2536  * FSINFO request
2537  */
2538 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2539                                 struct nfs4_fsinfo_arg *args)
2540 {
2541         struct compound_hdr hdr = {
2542                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543         };
2544
2545         encode_compound_hdr(xdr, req, &hdr);
2546         encode_sequence(xdr, &args->seq_args, &hdr);
2547         encode_putfh(xdr, args->fh, &hdr);
2548         encode_fsinfo(xdr, args->bitmask, &hdr);
2549         encode_nops(&hdr);
2550 }
2551
2552 /*
2553  * a PATHCONF request
2554  */
2555 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                   const struct nfs4_pathconf_arg *args)
2557 {
2558         struct compound_hdr hdr = {
2559                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560         };
2561
2562         encode_compound_hdr(xdr, req, &hdr);
2563         encode_sequence(xdr, &args->seq_args, &hdr);
2564         encode_putfh(xdr, args->fh, &hdr);
2565         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566                            &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * a STATFS request
2572  */
2573 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                 const struct nfs4_statfs_arg *args)
2575 {
2576         struct compound_hdr hdr = {
2577                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_sequence(xdr, &args->seq_args, &hdr);
2582         encode_putfh(xdr, args->fh, &hdr);
2583         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585         encode_nops(&hdr);
2586 }
2587
2588 /*
2589  * GETATTR_BITMAP request
2590  */
2591 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2592                                      struct xdr_stream *xdr,
2593                                      struct nfs4_server_caps_arg *args)
2594 {
2595         struct compound_hdr hdr = {
2596                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597         };
2598
2599         encode_compound_hdr(xdr, req, &hdr);
2600         encode_sequence(xdr, &args->seq_args, &hdr);
2601         encode_putfh(xdr, args->fhandle, &hdr);
2602         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2604                            FATTR4_WORD0_LINK_SUPPORT|
2605                            FATTR4_WORD0_SYMLINK_SUPPORT|
2606                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2607         encode_nops(&hdr);
2608 }
2609
2610 /*
2611  * a RENEW request
2612  */
2613 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2614                                struct nfs_client *clp)
2615 {
2616         struct compound_hdr hdr = {
2617                 .nops   = 0,
2618         };
2619
2620         encode_compound_hdr(xdr, req, &hdr);
2621         encode_renew(xdr, clp->cl_clientid, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * a SETCLIENTID request
2627  */
2628 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2629                                      struct xdr_stream *xdr,
2630                                      struct nfs4_setclientid *sc)
2631 {
2632         struct compound_hdr hdr = {
2633                 .nops   = 0,
2634         };
2635
2636         encode_compound_hdr(xdr, req, &hdr);
2637         encode_setclientid(xdr, sc, &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a SETCLIENTID_CONFIRM request
2643  */
2644 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2645                                              struct xdr_stream *xdr,
2646                                              struct nfs4_setclientid_res *arg)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_setclientid_confirm(xdr, arg, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * DELEGRETURN request
2659  */
2660 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2661                                      struct xdr_stream *xdr,
2662                                      const struct nfs4_delegreturnargs *args)
2663 {
2664         struct compound_hdr hdr = {
2665                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_sequence(xdr, &args->seq_args, &hdr);
2670         encode_putfh(xdr, args->fhandle, &hdr);
2671         encode_getfattr(xdr, args->bitmask, &hdr);
2672         encode_delegreturn(xdr, args->stateid, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 /*
2677  * Encode FS_LOCATIONS request
2678  */
2679 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2680                                       struct xdr_stream *xdr,
2681                                       struct nfs4_fs_locations_arg *args)
2682 {
2683         struct compound_hdr hdr = {
2684                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685         };
2686         uint32_t replen;
2687
2688         encode_compound_hdr(xdr, req, &hdr);
2689         encode_sequence(xdr, &args->seq_args, &hdr);
2690         if (args->migration) {
2691                 encode_putfh(xdr, args->fh, &hdr);
2692                 replen = hdr.replen;
2693                 encode_fs_locations(xdr, args->bitmask, &hdr);
2694                 if (args->renew)
2695                         encode_renew(xdr, args->clientid, &hdr);
2696         } else {
2697                 encode_putfh(xdr, args->dir_fh, &hdr);
2698                 encode_lookup(xdr, args->name, &hdr);
2699                 replen = hdr.replen;
2700                 encode_fs_locations(xdr, args->bitmask, &hdr);
2701         }
2702
2703         /* Set up reply kvec to capture returned fs_locations array. */
2704         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2705                         0, PAGE_SIZE);
2706         encode_nops(&hdr);
2707 }
2708
2709 /*
2710  * Encode SECINFO request
2711  */
2712 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2713                                 struct xdr_stream *xdr,
2714                                 struct nfs4_secinfo_arg *args)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2718         };
2719
2720         encode_compound_hdr(xdr, req, &hdr);
2721         encode_sequence(xdr, &args->seq_args, &hdr);
2722         encode_putfh(xdr, args->dir_fh, &hdr);
2723         encode_secinfo(xdr, args->name, &hdr);
2724         encode_nops(&hdr);
2725 }
2726
2727 /*
2728  * Encode FSID_PRESENT request
2729  */
2730 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2731                                       struct xdr_stream *xdr,
2732                                       struct nfs4_fsid_present_arg *args)
2733 {
2734         struct compound_hdr hdr = {
2735                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2736         };
2737
2738         encode_compound_hdr(xdr, req, &hdr);
2739         encode_sequence(xdr, &args->seq_args, &hdr);
2740         encode_putfh(xdr, args->fh, &hdr);
2741         encode_getfh(xdr, &hdr);
2742         if (args->renew)
2743                 encode_renew(xdr, args->clientid, &hdr);
2744         encode_nops(&hdr);
2745 }
2746
2747 #if defined(CONFIG_NFS_V4_1)
2748 /*
2749  * BIND_CONN_TO_SESSION request
2750  */
2751 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2752                                 struct xdr_stream *xdr,
2753                                 struct nfs_client *clp)
2754 {
2755         struct compound_hdr hdr = {
2756                 .minorversion = clp->cl_mvops->minor_version,
2757         };
2758
2759         encode_compound_hdr(xdr, req, &hdr);
2760         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2761         encode_nops(&hdr);
2762 }
2763
2764 /*
2765  * EXCHANGE_ID request
2766  */
2767 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2768                                      struct xdr_stream *xdr,
2769                                      struct nfs41_exchange_id_args *args)
2770 {
2771         struct compound_hdr hdr = {
2772                 .minorversion = args->client->cl_mvops->minor_version,
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_exchange_id(xdr, args, &hdr);
2777         encode_nops(&hdr);
2778 }
2779
2780 /*
2781  * a CREATE_SESSION request
2782  */
2783 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2784                                         struct xdr_stream *xdr,
2785                                         struct nfs41_create_session_args *args)
2786 {
2787         struct compound_hdr hdr = {
2788                 .minorversion = args->client->cl_mvops->minor_version,
2789         };
2790
2791         encode_compound_hdr(xdr, req, &hdr);
2792         encode_create_session(xdr, args, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * a DESTROY_SESSION request
2798  */
2799 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2800                                          struct xdr_stream *xdr,
2801                                          struct nfs4_session *session)
2802 {
2803         struct compound_hdr hdr = {
2804                 .minorversion = session->clp->cl_mvops->minor_version,
2805         };
2806
2807         encode_compound_hdr(xdr, req, &hdr);
2808         encode_destroy_session(xdr, session, &hdr);
2809         encode_nops(&hdr);
2810 }
2811
2812 /*
2813  * a DESTROY_CLIENTID request
2814  */
2815 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2816                                          struct xdr_stream *xdr,
2817                                          struct nfs_client *clp)
2818 {
2819         struct compound_hdr hdr = {
2820                 .minorversion = clp->cl_mvops->minor_version,
2821         };
2822
2823         encode_compound_hdr(xdr, req, &hdr);
2824         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2825         encode_nops(&hdr);
2826 }
2827
2828 /*
2829  * a SEQUENCE request
2830  */
2831 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2832                                   struct nfs4_sequence_args *args)
2833 {
2834         struct compound_hdr hdr = {
2835                 .minorversion = nfs4_xdr_minorversion(args),
2836         };
2837
2838         encode_compound_hdr(xdr, req, &hdr);
2839         encode_sequence(xdr, args, &hdr);
2840         encode_nops(&hdr);
2841 }
2842
2843 /*
2844  * a GET_LEASE_TIME request
2845  */
2846 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2847                                         struct xdr_stream *xdr,
2848                                         struct nfs4_get_lease_time_args *args)
2849 {
2850         struct compound_hdr hdr = {
2851                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2852         };
2853         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2854
2855         encode_compound_hdr(xdr, req, &hdr);
2856         encode_sequence(xdr, &args->la_seq_args, &hdr);
2857         encode_putrootfh(xdr, &hdr);
2858         encode_fsinfo(xdr, lease_bitmap, &hdr);
2859         encode_nops(&hdr);
2860 }
2861
2862 /*
2863  * a RECLAIM_COMPLETE request
2864  */
2865 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2866                                           struct xdr_stream *xdr,
2867                                 struct nfs41_reclaim_complete_args *args)
2868 {
2869         struct compound_hdr hdr = {
2870                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2871         };
2872
2873         encode_compound_hdr(xdr, req, &hdr);
2874         encode_sequence(xdr, &args->seq_args, &hdr);
2875         encode_reclaim_complete(xdr, args, &hdr);
2876         encode_nops(&hdr);
2877 }
2878
2879 /*
2880  * Encode GETDEVICEINFO request
2881  */
2882 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2883                                        struct xdr_stream *xdr,
2884                                        struct nfs4_getdeviceinfo_args *args)
2885 {
2886         struct compound_hdr hdr = {
2887                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2888         };
2889
2890         encode_compound_hdr(xdr, req, &hdr);
2891         encode_sequence(xdr, &args->seq_args, &hdr);
2892         encode_getdeviceinfo(xdr, args, &hdr);
2893
2894         /* set up reply kvec. Subtract notification bitmap max size (2)
2895          * so that notification bitmap is put in xdr_buf tail */
2896         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2897                          args->pdev->pages, args->pdev->pgbase,
2898                          args->pdev->pglen);
2899
2900         encode_nops(&hdr);
2901 }
2902
2903 /*
2904  *  Encode LAYOUTGET request
2905  */
2906 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2907                                    struct xdr_stream *xdr,
2908                                    struct nfs4_layoutget_args *args)
2909 {
2910         struct compound_hdr hdr = {
2911                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2912         };
2913
2914         encode_compound_hdr(xdr, req, &hdr);
2915         encode_sequence(xdr, &args->seq_args, &hdr);
2916         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2917         encode_layoutget(xdr, args, &hdr);
2918
2919         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2920             args->layout.pages, 0, args->layout.pglen);
2921
2922         encode_nops(&hdr);
2923 }
2924
2925 /*
2926  *  Encode LAYOUTCOMMIT request
2927  */
2928 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2929                                       struct xdr_stream *xdr,
2930                                       struct nfs4_layoutcommit_args *args)
2931 {
2932         struct nfs4_layoutcommit_data *data =
2933                 container_of(args, struct nfs4_layoutcommit_data, args);
2934         struct compound_hdr hdr = {
2935                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2936         };
2937
2938         encode_compound_hdr(xdr, req, &hdr);
2939         encode_sequence(xdr, &args->seq_args, &hdr);
2940         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2941         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2942         encode_getfattr(xdr, args->bitmask, &hdr);
2943         encode_nops(&hdr);
2944 }
2945
2946 /*
2947  * Encode LAYOUTRETURN request
2948  */
2949 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2950                                       struct xdr_stream *xdr,
2951                                       struct nfs4_layoutreturn_args *args)
2952 {
2953         struct compound_hdr hdr = {
2954                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2955         };
2956
2957         encode_compound_hdr(xdr, req, &hdr);
2958         encode_sequence(xdr, &args->seq_args, &hdr);
2959         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2960         encode_layoutreturn(xdr, args, &hdr);
2961         encode_nops(&hdr);
2962 }
2963
2964 /*
2965  * Encode SECINFO_NO_NAME request
2966  */
2967 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2968                                         struct xdr_stream *xdr,
2969                                         struct nfs41_secinfo_no_name_args *args)
2970 {
2971         struct compound_hdr hdr = {
2972                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2973         };
2974
2975         encode_compound_hdr(xdr, req, &hdr);
2976         encode_sequence(xdr, &args->seq_args, &hdr);
2977         encode_putrootfh(xdr, &hdr);
2978         encode_secinfo_no_name(xdr, args, &hdr);
2979         encode_nops(&hdr);
2980         return 0;
2981 }
2982
2983 /*
2984  *  Encode TEST_STATEID request
2985  */
2986 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2987                                       struct xdr_stream *xdr,
2988                                       struct nfs41_test_stateid_args *args)
2989 {
2990         struct compound_hdr hdr = {
2991                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2992         };
2993
2994         encode_compound_hdr(xdr, req, &hdr);
2995         encode_sequence(xdr, &args->seq_args, &hdr);
2996         encode_test_stateid(xdr, args, &hdr);
2997         encode_nops(&hdr);
2998 }
2999
3000 /*
3001  *  Encode FREE_STATEID request
3002  */
3003 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3004                                      struct xdr_stream *xdr,
3005                                      struct nfs41_free_stateid_args *args)
3006 {
3007         struct compound_hdr hdr = {
3008                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3009         };
3010
3011         encode_compound_hdr(xdr, req, &hdr);
3012         encode_sequence(xdr, &args->seq_args, &hdr);
3013         encode_free_stateid(xdr, args, &hdr);
3014         encode_nops(&hdr);
3015 }
3016 #endif /* CONFIG_NFS_V4_1 */
3017
3018 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3019 {
3020         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3021                 "Remaining buffer length is %tu words.\n",
3022                 func, xdr->end - xdr->p);
3023 }
3024
3025 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3026 {
3027         __be32 *p;
3028
3029         p = xdr_inline_decode(xdr, 4);
3030         if (unlikely(!p))
3031                 goto out_overflow;
3032         *len = be32_to_cpup(p);
3033         p = xdr_inline_decode(xdr, *len);
3034         if (unlikely(!p))
3035                 goto out_overflow;
3036         *string = (char *)p;
3037         return 0;
3038 out_overflow:
3039         print_overflow_msg(__func__, xdr);
3040         return -EIO;
3041 }
3042
3043 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3044 {
3045         __be32 *p;
3046
3047         p = xdr_inline_decode(xdr, 8);
3048         if (unlikely(!p))
3049                 goto out_overflow;
3050         hdr->status = be32_to_cpup(p++);
3051         hdr->taglen = be32_to_cpup(p);
3052
3053         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3054         if (unlikely(!p))
3055                 goto out_overflow;
3056         hdr->tag = (char *)p;
3057         p += XDR_QUADLEN(hdr->taglen);
3058         hdr->nops = be32_to_cpup(p);
3059         if (unlikely(hdr->nops < 1))
3060                 return nfs4_stat_to_errno(hdr->status);
3061         return 0;
3062 out_overflow:
3063         print_overflow_msg(__func__, xdr);
3064         return -EIO;
3065 }
3066
3067 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3068                 int *nfs_retval)
3069 {
3070         __be32 *p;
3071         uint32_t opnum;
3072         int32_t nfserr;
3073
3074         p = xdr_inline_decode(xdr, 8);
3075         if (unlikely(!p))
3076                 goto out_overflow;
3077         opnum = be32_to_cpup(p++);
3078         if (unlikely(opnum != expected))
3079                 goto out_bad_operation;
3080         nfserr = be32_to_cpup(p);
3081         if (nfserr == NFS_OK)
3082                 *nfs_retval = 0;
3083         else
3084                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3085         return true;
3086 out_bad_operation:
3087         dprintk("nfs: Server returned operation"
3088                 " %d but we issued a request for %d\n",
3089                         opnum, expected);
3090         *nfs_retval = -EREMOTEIO;
3091         return false;
3092 out_overflow:
3093         print_overflow_msg(__func__, xdr);
3094         *nfs_retval = -EIO;
3095         return false;
3096 }
3097
3098 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3099 {
3100         int retval;
3101
3102         __decode_op_hdr(xdr, expected, &retval);
3103         return retval;
3104 }
3105
3106 /* Dummy routine */
3107 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3108 {
3109         __be32 *p;
3110         unsigned int strlen;
3111         char *str;
3112
3113         p = xdr_inline_decode(xdr, 12);
3114         if (likely(p))
3115                 return decode_opaque_inline(xdr, &strlen, &str);
3116         print_overflow_msg(__func__, xdr);
3117         return -EIO;
3118 }
3119
3120 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3121 {
3122         uint32_t bmlen;
3123         __be32 *p;
3124
3125         p = xdr_inline_decode(xdr, 4);
3126         if (unlikely(!p))
3127                 goto out_overflow;
3128         bmlen = be32_to_cpup(p);
3129
3130         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3131         p = xdr_inline_decode(xdr, (bmlen << 2));
3132         if (unlikely(!p))
3133                 goto out_overflow;
3134         if (bmlen > 0) {
3135                 bitmap[0] = be32_to_cpup(p++);
3136                 if (bmlen > 1) {
3137                         bitmap[1] = be32_to_cpup(p++);
3138                         if (bmlen > 2)
3139                                 bitmap[2] = be32_to_cpup(p);
3140                 }
3141         }
3142         return 0;
3143 out_overflow:
3144         print_overflow_msg(__func__, xdr);
3145         return -EIO;
3146 }
3147
3148 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3149 {
3150         __be32 *p;
3151
3152         p = xdr_inline_decode(xdr, 4);
3153         if (unlikely(!p))
3154                 goto out_overflow;
3155         *attrlen = be32_to_cpup(p);
3156         *savep = xdr_stream_pos(xdr);
3157         return 0;
3158 out_overflow:
3159         print_overflow_msg(__func__, xdr);
3160         return -EIO;
3161 }
3162
3163 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3164 {
3165         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3166                 int ret;
3167                 ret = decode_attr_bitmap(xdr, bitmask);
3168                 if (unlikely(ret < 0))
3169                         return ret;
3170                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3171         } else
3172                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3173         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3174                 bitmask[0], bitmask[1], bitmask[2]);
3175         return 0;
3176 }
3177
3178 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3179 {
3180         __be32 *p;
3181         int ret = 0;
3182
3183         *type = 0;
3184         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3185                 return -EIO;
3186         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3187                 p = xdr_inline_decode(xdr, 4);
3188                 if (unlikely(!p))
3189                         goto out_overflow;
3190                 *type = be32_to_cpup(p);
3191                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3192                         dprintk("%s: bad type %d\n", __func__, *type);
3193                         return -EIO;
3194                 }
3195                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3196                 ret = NFS_ATTR_FATTR_TYPE;
3197         }
3198         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3199         return ret;
3200 out_overflow:
3201         print_overflow_msg(__func__, xdr);
3202         return -EIO;
3203 }
3204
3205 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3206                                       uint32_t *bitmap, uint32_t *type)
3207 {
3208         __be32 *p;
3209
3210         *type = 0;
3211         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3212                 return -EIO;
3213         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3214                 p = xdr_inline_decode(xdr, 4);
3215                 if (unlikely(!p))
3216                         goto out_overflow;
3217                 *type = be32_to_cpup(p);
3218                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3219         }
3220         dprintk("%s: expire type=0x%x\n", __func__, *type);
3221         return 0;
3222 out_overflow:
3223         print_overflow_msg(__func__, xdr);
3224         return -EIO;
3225 }
3226
3227 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3228 {
3229         __be32 *p;
3230         int ret = 0;
3231
3232         *change = 0;
3233         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3234                 return -EIO;
3235         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3236                 p = xdr_inline_decode(xdr, 8);
3237                 if (unlikely(!p))
3238                         goto out_overflow;
3239                 xdr_decode_hyper(p, change);
3240                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3241                 ret = NFS_ATTR_FATTR_CHANGE;
3242         }
3243         dprintk("%s: change attribute=%Lu\n", __func__,
3244                         (unsigned long long)*change);
3245         return ret;
3246 out_overflow:
3247         print_overflow_msg(__func__, xdr);
3248         return -EIO;
3249 }
3250
3251 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3252 {
3253         __be32 *p;
3254         int ret = 0;
3255
3256         *size = 0;
3257         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3258                 return -EIO;
3259         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3260                 p = xdr_inline_decode(xdr, 8);
3261                 if (unlikely(!p))
3262                         goto out_overflow;
3263                 xdr_decode_hyper(p, size);
3264                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3265                 ret = NFS_ATTR_FATTR_SIZE;
3266         }
3267         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3268         return ret;
3269 out_overflow:
3270         print_overflow_msg(__func__, xdr);
3271         return -EIO;
3272 }
3273
3274 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3275 {
3276         __be32 *p;
3277
3278         *res = 0;
3279         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3280                 return -EIO;
3281         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3282                 p = xdr_inline_decode(xdr, 4);
3283                 if (unlikely(!p))
3284                         goto out_overflow;
3285                 *res = be32_to_cpup(p);
3286                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3287         }
3288         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3289         return 0;
3290 out_overflow:
3291         print_overflow_msg(__func__, xdr);
3292         return -EIO;
3293 }
3294
3295 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3296 {
3297         __be32 *p;
3298
3299         *res = 0;
3300         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3301                 return -EIO;
3302         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3303                 p = xdr_inline_decode(xdr, 4);
3304                 if (unlikely(!p))
3305                         goto out_overflow;
3306                 *res = be32_to_cpup(p);
3307                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3308         }
3309         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3310         return 0;
3311 out_overflow:
3312         print_overflow_msg(__func__, xdr);
3313         return -EIO;
3314 }
3315
3316 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3317 {
3318         __be32 *p;
3319         int ret = 0;
3320
3321         fsid->major = 0;
3322         fsid->minor = 0;
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3326                 p = xdr_inline_decode(xdr, 16);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 p = xdr_decode_hyper(p, &fsid->major);
3330                 xdr_decode_hyper(p, &fsid->minor);
3331                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3332                 ret = NFS_ATTR_FATTR_FSID;
3333         }
3334         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3335                         (unsigned long long)fsid->major,
3336                         (unsigned long long)fsid->minor);
3337         return ret;
3338 out_overflow:
3339         print_overflow_msg(__func__, xdr);
3340         return -EIO;
3341 }
3342
3343 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3344 {
3345         __be32 *p;
3346
3347         *res = 60;
3348         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3349                 return -EIO;
3350         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3351                 p = xdr_inline_decode(xdr, 4);
3352                 if (unlikely(!p))
3353                         goto out_overflow;
3354                 *res = be32_to_cpup(p);
3355                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3356         }
3357         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3358         return 0;
3359 out_overflow:
3360         print_overflow_msg(__func__, xdr);
3361         return -EIO;
3362 }
3363
3364 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3365 {
3366         __be32 *p;
3367
3368         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3369                 return -EIO;
3370         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3371                 p = xdr_inline_decode(xdr, 4);
3372                 if (unlikely(!p))
3373                         goto out_overflow;
3374                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3375                 *res = -be32_to_cpup(p);
3376         }
3377         return 0;
3378 out_overflow:
3379         print_overflow_msg(__func__, xdr);
3380         return -EIO;
3381 }
3382
3383 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3384 {
3385         __be32 *p;
3386         int len;
3387
3388         if (fh != NULL)
3389                 memset(fh, 0, sizeof(*fh));
3390
3391         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3392                 return -EIO;
3393         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3394                 p = xdr_inline_decode(xdr, 4);
3395                 if (unlikely(!p))
3396                         goto out_overflow;
3397                 len = be32_to_cpup(p);
3398                 if (len > NFS4_FHSIZE)
3399                         return -EIO;
3400                 p = xdr_inline_decode(xdr, len);
3401                 if (unlikely(!p))
3402                         goto out_overflow;
3403                 if (fh != NULL) {
3404                         memcpy(fh->data, p, len);
3405                         fh->size = len;
3406                 }
3407                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3408         }
3409         return 0;
3410 out_overflow:
3411         print_overflow_msg(__func__, xdr);
3412         return -EIO;
3413 }
3414
3415 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3416 {
3417         __be32 *p;
3418
3419         *res = 0;
3420         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3423                 p = xdr_inline_decode(xdr, 4);
3424                 if (unlikely(!p))
3425                         goto out_overflow;
3426                 *res = be32_to_cpup(p);
3427                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3428         }
3429         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3430         return 0;
3431 out_overflow:
3432         print_overflow_msg(__func__, xdr);
3433         return -EIO;
3434 }
3435
3436 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3437 {
3438         __be32 *p;
3439         int ret = 0;
3440
3441         *fileid = 0;
3442         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3443                 return -EIO;
3444         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3445                 p = xdr_inline_decode(xdr, 8);
3446                 if (unlikely(!p))
3447                         goto out_overflow;
3448                 xdr_decode_hyper(p, fileid);
3449                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3450                 ret = NFS_ATTR_FATTR_FILEID;
3451         }
3452         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3453         return ret;
3454 out_overflow:
3455         print_overflow_msg(__func__, xdr);
3456         return -EIO;
3457 }
3458
3459 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3460 {
3461         __be32 *p;
3462         int ret = 0;
3463
3464         *fileid = 0;
3465         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3466                 return -EIO;
3467         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3468                 p = xdr_inline_decode(xdr, 8);
3469                 if (unlikely(!p))
3470                         goto out_overflow;
3471                 xdr_decode_hyper(p, fileid);
3472                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3473                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3474         }
3475         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3476         return ret;
3477 out_overflow:
3478         print_overflow_msg(__func__, xdr);
3479         return -EIO;
3480 }
3481
3482 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3483 {
3484         __be32 *p;
3485         int status = 0;
3486
3487         *res = 0;
3488         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3489                 return -EIO;
3490         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3491                 p = xdr_inline_decode(xdr, 8);
3492                 if (unlikely(!p))
3493                         goto out_overflow;
3494                 xdr_decode_hyper(p, res);
3495                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3496         }
3497         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3498         return status;
3499 out_overflow:
3500         print_overflow_msg(__func__, xdr);
3501         return -EIO;
3502 }
3503
3504 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3505 {
3506         __be32 *p;
3507         int status = 0;
3508
3509         *res = 0;
3510         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3511                 return -EIO;
3512         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3513                 p = xdr_inline_decode(xdr, 8);
3514                 if (unlikely(!p))
3515                         goto out_overflow;
3516                 xdr_decode_hyper(p, res);
3517                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3518         }
3519         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3520         return status;
3521 out_overflow:
3522         print_overflow_msg(__func__, xdr);
3523         return -EIO;
3524 }
3525
3526 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3527 {
3528         __be32 *p;
3529         int status = 0;
3530
3531         *res = 0;
3532         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3533                 return -EIO;
3534         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3535                 p = xdr_inline_decode(xdr, 8);
3536                 if (unlikely(!p))
3537                         goto out_overflow;
3538                 xdr_decode_hyper(p, res);
3539                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3540         }
3541         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3542         return status;
3543 out_overflow:
3544         print_overflow_msg(__func__, xdr);
3545         return -EIO;
3546 }
3547
3548 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3549 {
3550         u32 n;
3551         __be32 *p;
3552         int status = 0;
3553
3554         p = xdr_inline_decode(xdr, 4);
3555         if (unlikely(!p))
3556                 goto out_overflow;
3557         n = be32_to_cpup(p);
3558         if (n == 0)
3559                 goto root_path;
3560         dprintk("pathname4: ");
3561         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3562                 dprintk("cannot parse %d components in path\n", n);
3563                 goto out_eio;
3564         }
3565         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3566                 struct nfs4_string *component = &path->components[path->ncomponents];
3567                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3568                 if (unlikely(status != 0))
3569                         goto out_eio;
3570                 ifdebug (XDR)
3571                         pr_cont("%s%.*s ",
3572                                 (path->ncomponents != n ? "/ " : ""),
3573                                 component->len, component->data);
3574         }
3575 out:
3576         return status;
3577 root_path:
3578 /* a root pathname is sent as a zero component4 */
3579         path->ncomponents = 1;
3580         path->components[0].len=0;
3581         path->components[0].data=NULL;
3582         dprintk("pathname4: /\n");
3583         goto out;
3584 out_eio:
3585         dprintk(" status %d", status);
3586         status = -EIO;
3587         goto out;
3588 out_overflow:
3589         print_overflow_msg(__func__, xdr);
3590         return -EIO;
3591 }
3592
3593 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3594 {
3595         int n;
3596         __be32 *p;
3597         int status = -EIO;
3598
3599         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3600                 goto out;
3601         status = 0;
3602         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3603                 goto out;
3604         status = -EIO;
3605         /* Ignore borken servers that return unrequested attrs */
3606         if (unlikely(res == NULL))
3607                 goto out;
3608         dprintk("%s: fsroot:\n", __func__);
3609         status = decode_pathname(xdr, &res->fs_path);
3610         if (unlikely(status != 0))
3611                 goto out;
3612         p = xdr_inline_decode(xdr, 4);
3613         if (unlikely(!p))
3614                 goto out_overflow;
3615         n = be32_to_cpup(p);
3616         if (n <= 0)
3617                 goto out_eio;
3618         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3619                 u32 m;
3620                 struct nfs4_fs_location *loc;
3621
3622                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3623                         break;
3624                 loc = &res->locations[res->nlocations];
3625                 p = xdr_inline_decode(xdr, 4);
3626                 if (unlikely(!p))
3627                         goto out_overflow;
3628                 m = be32_to_cpup(p);
3629
3630                 dprintk("%s: servers:\n", __func__);
3631                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3632                         struct nfs4_string *server;
3633
3634                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3635                                 unsigned int i;
3636                                 dprintk("%s: using first %u of %u servers "
3637                                         "returned for location %u\n",
3638                                                 __func__,
3639                                                 NFS4_FS_LOCATION_MAXSERVERS,
3640                                                 m, res->nlocations);
3641                                 for (i = loc->nservers; i < m; i++) {
3642                                         unsigned int len;
3643                                         char *data;
3644                                         status = decode_opaque_inline(xdr, &len, &data);
3645                                         if (unlikely(status != 0))
3646                                                 goto out_eio;
3647                                 }
3648                                 break;
3649                         }
3650                         server = &loc->servers[loc->nservers];
3651                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3652                         if (unlikely(status != 0))
3653                                 goto out_eio;
3654                         dprintk("%s ", server->data);
3655                 }
3656                 status = decode_pathname(xdr, &loc->rootpath);
3657                 if (unlikely(status != 0))
3658                         goto out_eio;
3659         }
3660         if (res->nlocations != 0)
3661                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3662 out:
3663         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3664         return status;
3665 out_overflow:
3666         print_overflow_msg(__func__, xdr);
3667 out_eio:
3668         status = -EIO;
3669         goto out;
3670 }
3671
3672 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3673 {
3674         __be32 *p;
3675         int status = 0;
3676
3677         *res = 0;
3678         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3679                 return -EIO;
3680         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3681                 p = xdr_inline_decode(xdr, 8);
3682                 if (unlikely(!p))
3683                         goto out_overflow;
3684                 xdr_decode_hyper(p, res);
3685                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3686         }
3687         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3688         return status;
3689 out_overflow:
3690         print_overflow_msg(__func__, xdr);
3691         return -EIO;
3692 }
3693
3694 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3695 {
3696         __be32 *p;
3697         int status = 0;
3698
3699         *maxlink = 1;
3700         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3703                 p = xdr_inline_decode(xdr, 4);
3704                 if (unlikely(!p))
3705                         goto out_overflow;
3706                 *maxlink = be32_to_cpup(p);
3707                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3708         }
3709         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3710         return status;
3711 out_overflow:
3712         print_overflow_msg(__func__, xdr);
3713         return -EIO;
3714 }
3715
3716 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3717 {
3718         __be32 *p;
3719         int status = 0;
3720
3721         *maxname = 1024;
3722         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3723                 return -EIO;
3724         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3725                 p = xdr_inline_decode(xdr, 4);
3726                 if (unlikely(!p))
3727                         goto out_overflow;
3728                 *maxname = be32_to_cpup(p);
3729                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3730         }
3731         dprintk("%s: maxname=%u\n", __func__, *maxname);
3732         return status;
3733 out_overflow:
3734         print_overflow_msg(__func__, xdr);
3735         return -EIO;
3736 }
3737
3738 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3739 {
3740         __be32 *p;
3741         int status = 0;
3742
3743         *res = 1024;
3744         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3745                 return -EIO;
3746         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3747                 uint64_t maxread;
3748                 p = xdr_inline_decode(xdr, 8);
3749                 if (unlikely(!p))
3750                         goto out_overflow;
3751                 xdr_decode_hyper(p, &maxread);
3752                 if (maxread > 0x7FFFFFFF)
3753                         maxread = 0x7FFFFFFF;
3754                 *res = (uint32_t)maxread;
3755                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3756         }
3757         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3758         return status;
3759 out_overflow:
3760         print_overflow_msg(__func__, xdr);
3761         return -EIO;
3762 }
3763
3764 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3765 {
3766         __be32 *p;
3767         int status = 0;
3768
3769         *res = 1024;
3770         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3771                 return -EIO;
3772         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3773                 uint64_t maxwrite;
3774                 p = xdr_inline_decode(xdr, 8);
3775                 if (unlikely(!p))
3776                         goto out_overflow;
3777                 xdr_decode_hyper(p, &maxwrite);
3778                 if (maxwrite > 0x7FFFFFFF)
3779                         maxwrite = 0x7FFFFFFF;
3780                 *res = (uint32_t)maxwrite;
3781                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3782         }
3783         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3784         return status;
3785 out_overflow:
3786         print_overflow_msg(__func__, xdr);
3787         return -EIO;
3788 }
3789
3790 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3791 {
3792         uint32_t tmp;
3793         __be32 *p;
3794         int ret = 0;
3795
3796         *mode = 0;
3797         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3798                 return -EIO;
3799         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3800                 p = xdr_inline_decode(xdr, 4);
3801                 if (unlikely(!p))
3802                         goto out_overflow;
3803                 tmp = be32_to_cpup(p);
3804                 *mode = tmp & ~S_IFMT;
3805                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3806                 ret = NFS_ATTR_FATTR_MODE;
3807         }
3808         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3809         return ret;
3810 out_overflow:
3811         print_overflow_msg(__func__, xdr);
3812         return -EIO;
3813 }
3814
3815 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3816 {
3817         __be32 *p;
3818         int ret = 0;
3819
3820         *nlink = 1;
3821         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3822                 return -EIO;
3823         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3824                 p = xdr_inline_decode(xdr, 4);
3825                 if (unlikely(!p))
3826                         goto out_overflow;
3827                 *nlink = be32_to_cpup(p);
3828                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3829                 ret = NFS_ATTR_FATTR_NLINK;
3830         }
3831         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3832         return ret;
3833 out_overflow:
3834         print_overflow_msg(__func__, xdr);
3835         return -EIO;
3836 }
3837
3838 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3839                 const struct nfs_server *server, kuid_t *uid,
3840                 struct nfs4_string *owner_name)
3841 {
3842         uint32_t len;
3843         __be32 *p;
3844         int ret = 0;
3845
3846         *uid = make_kuid(&init_user_ns, -2);
3847         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3848                 return -EIO;
3849         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3850                 p = xdr_inline_decode(xdr, 4);
3851                 if (unlikely(!p))
3852                         goto out_overflow;
3853                 len = be32_to_cpup(p);
3854                 p = xdr_inline_decode(xdr, len);
3855                 if (unlikely(!p))
3856                         goto out_overflow;
3857                 if (owner_name != NULL) {
3858                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3859                         if (owner_name->data != NULL) {
3860                                 owner_name->len = len;
3861                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3862                         }
3863                 } else if (len < XDR_MAX_NETOBJ) {
3864                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3865                                 ret = NFS_ATTR_FATTR_OWNER;
3866                         else
3867                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3868                                                 __func__);
3869                 } else
3870                         dprintk("%s: name too long (%u)!\n",
3871                                         __func__, len);
3872                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3873         }
3874         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3875         return ret;
3876 out_overflow:
3877         print_overflow_msg(__func__, xdr);
3878         return -EIO;
3879 }
3880
3881 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3882                 const struct nfs_server *server, kgid_t *gid,
3883                 struct nfs4_string *group_name)
3884 {
3885         uint32_t len;
3886         __be32 *p;
3887         int ret = 0;
3888
3889         *gid = make_kgid(&init_user_ns, -2);
3890         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3891                 return -EIO;
3892         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3893                 p = xdr_inline_decode(xdr, 4);
3894                 if (unlikely(!p))
3895                         goto out_overflow;
3896                 len = be32_to_cpup(p);
3897                 p = xdr_inline_decode(xdr, len);
3898                 if (unlikely(!p))
3899                         goto out_overflow;
3900                 if (group_name != NULL) {
3901                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3902                         if (group_name->data != NULL) {
3903                                 group_name->len = len;
3904                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3905                         }
3906                 } else if (len < XDR_MAX_NETOBJ) {
3907                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3908                                 ret = NFS_ATTR_FATTR_GROUP;
3909                         else
3910                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3911                                                 __func__);
3912                 } else
3913                         dprintk("%s: name too long (%u)!\n",
3914                                         __func__, len);
3915                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3916         }
3917         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3918         return ret;
3919 out_overflow:
3920         print_overflow_msg(__func__, xdr);
3921         return -EIO;
3922 }
3923
3924 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3925 {
3926         uint32_t major = 0, minor = 0;
3927         __be32 *p;
3928         int ret = 0;
3929
3930         *rdev = MKDEV(0,0);
3931         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3932                 return -EIO;
3933         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3934                 dev_t tmp;
3935
3936                 p = xdr_inline_decode(xdr, 8);
3937                 if (unlikely(!p))
3938                         goto out_overflow;
3939                 major = be32_to_cpup(p++);
3940                 minor = be32_to_cpup(p);
3941                 tmp = MKDEV(major, minor);
3942                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3943                         *rdev = tmp;
3944                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3945                 ret = NFS_ATTR_FATTR_RDEV;
3946         }
3947         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3948         return ret;
3949 out_overflow:
3950         print_overflow_msg(__func__, xdr);
3951         return -EIO;
3952 }
3953
3954 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3955 {
3956         __be32 *p;
3957         int status = 0;
3958
3959         *res = 0;
3960         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3961                 return -EIO;
3962         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3963                 p = xdr_inline_decode(xdr, 8);
3964                 if (unlikely(!p))
3965                         goto out_overflow;
3966                 xdr_decode_hyper(p, res);
3967                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3968         }
3969         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3970         return status;
3971 out_overflow:
3972         print_overflow_msg(__func__, xdr);
3973         return -EIO;
3974 }
3975
3976 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3977 {
3978         __be32 *p;
3979         int status = 0;
3980
3981         *res = 0;
3982         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3983                 return -EIO;
3984         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3985                 p = xdr_inline_decode(xdr, 8);
3986                 if (unlikely(!p))
3987                         goto out_overflow;
3988                 xdr_decode_hyper(p, res);
3989                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3990         }
3991         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3992         return status;
3993 out_overflow:
3994         print_overflow_msg(__func__, xdr);
3995         return -EIO;
3996 }
3997
3998 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3999 {
4000         __be32 *p;
4001         int status = 0;
4002
4003         *res = 0;
4004         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4005                 return -EIO;
4006         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4007                 p = xdr_inline_decode(xdr, 8);
4008                 if (unlikely(!p))
4009                         goto out_overflow;
4010                 xdr_decode_hyper(p, res);
4011                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4012         }
4013         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4014         return status;
4015 out_overflow:
4016         print_overflow_msg(__func__, xdr);
4017         return -EIO;
4018 }
4019
4020 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4021 {
4022         __be32 *p;
4023         int ret = 0;
4024
4025         *used = 0;
4026         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4027                 return -EIO;
4028         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4029                 p = xdr_inline_decode(xdr, 8);
4030                 if (unlikely(!p))
4031                         goto out_overflow;
4032                 xdr_decode_hyper(p, used);
4033                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4034                 ret = NFS_ATTR_FATTR_SPACE_USED;
4035         }
4036         dprintk("%s: space used=%Lu\n", __func__,
4037                         (unsigned long long)*used);
4038         return ret;
4039 out_overflow:
4040         print_overflow_msg(__func__, xdr);
4041         return -EIO;
4042 }
4043
4044 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4045 {
4046         __be32 *p;
4047         uint64_t sec;
4048         uint32_t nsec;
4049
4050         p = xdr_inline_decode(xdr, 12);
4051         if (unlikely(!p))
4052                 goto out_overflow;
4053         p = xdr_decode_hyper(p, &sec);
4054         nsec = be32_to_cpup(p);
4055         time->tv_sec = (time_t)sec;
4056         time->tv_nsec = (long)nsec;
4057         return 0;
4058 out_overflow:
4059         print_overflow_msg(__func__, xdr);
4060         return -EIO;
4061 }
4062
4063 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4064 {
4065         int status = 0;
4066
4067         time->tv_sec = 0;
4068         time->tv_nsec = 0;
4069         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4070                 return -EIO;
4071         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4072                 status = decode_attr_time(xdr, time);
4073                 if (status == 0)
4074                         status = NFS_ATTR_FATTR_ATIME;
4075                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4076         }
4077         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4078         return status;
4079 }
4080
4081 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4082 {
4083         int status = 0;
4084
4085         time->tv_sec = 0;
4086         time->tv_nsec = 0;
4087         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4088                 return -EIO;
4089         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4090                 status = decode_attr_time(xdr, time);
4091                 if (status == 0)
4092                         status = NFS_ATTR_FATTR_CTIME;
4093                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4094         }
4095         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4096         return status;
4097 }
4098
4099 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4100                                   struct timespec *time)
4101 {
4102         int status = 0;
4103
4104         time->tv_sec = 0;
4105         time->tv_nsec = 0;
4106         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4107                 return -EIO;
4108         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4109                 status = decode_attr_time(xdr, time);
4110                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4111         }
4112         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4113                 (long)time->tv_nsec);
4114         return status;
4115 }
4116
4117 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4118                                         struct nfs4_label *label)
4119 {
4120         uint32_t pi = 0;
4121         uint32_t lfs = 0;
4122         __u32 len;
4123         __be32 *p;
4124         int status = 0;
4125
4126         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4127                 return -EIO;
4128         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4129                 p = xdr_inline_decode(xdr, 4);
4130                 if (unlikely(!p))
4131                         goto out_overflow;
4132                 lfs = be32_to_cpup(p++);
4133                 p = xdr_inline_decode(xdr, 4);
4134                 if (unlikely(!p))
4135                         goto out_overflow;
4136                 pi = be32_to_cpup(p++);
4137                 p = xdr_inline_decode(xdr, 4);
4138                 if (unlikely(!p))
4139                         goto out_overflow;
4140                 len = be32_to_cpup(p++);
4141                 p = xdr_inline_decode(xdr, len);
4142                 if (unlikely(!p))
4143                         goto out_overflow;
4144                 if (len < NFS4_MAXLABELLEN) {
4145                         if (label) {
4146                                 memcpy(label->label, p, len);
4147                                 label->len = len;
4148                                 label->pi = pi;
4149                                 label->lfs = lfs;
4150                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4151                         }
4152                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4153                 } else
4154                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4155                                         __func__, len);
4156         }
4157         if (label && label->label)
4158                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4159                         (char *)label->label, label->len, label->pi, label->lfs);
4160         return status;
4161
4162 out_overflow:
4163         print_overflow_msg(__func__, xdr);
4164         return -EIO;
4165 }
4166
4167 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4168 {
4169         int status = 0;
4170
4171         time->tv_sec = 0;
4172         time->tv_nsec = 0;
4173         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4174                 return -EIO;
4175         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4176                 status = decode_attr_time(xdr, time);
4177                 if (status == 0)
4178                         status = NFS_ATTR_FATTR_MTIME;
4179                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4180         }
4181         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4182         return status;
4183 }
4184
4185 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4186 {
4187         unsigned int attrwords = XDR_QUADLEN(attrlen);
4188         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4189
4190         if (unlikely(attrwords != nwords)) {
4191                 dprintk("%s: server returned incorrect attribute length: "
4192                         "%u %c %u\n",
4193                                 __func__,
4194                                 attrwords << 2,
4195                                 (attrwords < nwords) ? '<' : '>',
4196                                 nwords << 2);
4197                 return -EIO;
4198         }
4199         return 0;
4200 }
4201
4202 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4203 {
4204         __be32 *p;
4205
4206         p = xdr_inline_decode(xdr, 20);
4207         if (unlikely(!p))
4208                 goto out_overflow;
4209         cinfo->atomic = be32_to_cpup(p++);
4210         p = xdr_decode_hyper(p, &cinfo->before);
4211         xdr_decode_hyper(p, &cinfo->after);
4212         return 0;
4213 out_overflow:
4214         print_overflow_msg(__func__, xdr);
4215         return -EIO;
4216 }
4217
4218 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4219 {
4220         __be32 *p;
4221         uint32_t supp, acc;
4222         int status;
4223
4224         status = decode_op_hdr(xdr, OP_ACCESS);
4225         if (status)
4226                 return status;
4227         p = xdr_inline_decode(xdr, 8);
4228         if (unlikely(!p))
4229                 goto out_overflow;
4230         supp = be32_to_cpup(p++);
4231         acc = be32_to_cpup(p);
4232         *supported = supp;
4233         *access = acc;
4234         return 0;
4235 out_overflow:
4236         print_overflow_msg(__func__, xdr);
4237         return -EIO;
4238 }
4239
4240 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4241 {
4242         __be32 *p;
4243
4244         p = xdr_inline_decode(xdr, len);
4245         if (likely(p)) {
4246                 memcpy(buf, p, len);
4247                 return 0;
4248         }
4249         print_overflow_msg(__func__, xdr);
4250         return -EIO;
4251 }
4252
4253 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4254 {
4255         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4256 }
4257
4258 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4259 {
4260         int status;
4261
4262         status = decode_op_hdr(xdr, OP_CLOSE);
4263         if (status != -EIO)
4264                 nfs_increment_open_seqid(status, res->seqid);
4265         if (!status)
4266                 status = decode_stateid(xdr, &res->stateid);
4267         return status;
4268 }
4269
4270 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4271 {
4272         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4273 }
4274
4275 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4276 {
4277         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4278 }
4279
4280 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4281 {
4282         int status;
4283
4284         status = decode_op_hdr(xdr, OP_COMMIT);
4285         if (!status)
4286                 status = decode_write_verifier(xdr, &res->verf->verifier);
4287         return status;
4288 }
4289
4290 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4291 {
4292         __be32 *p;
4293         uint32_t bmlen;
4294         int status;
4295
4296         status = decode_op_hdr(xdr, OP_CREATE);
4297         if (status)
4298                 return status;
4299         if ((status = decode_change_info(xdr, cinfo)))
4300                 return status;
4301         p = xdr_inline_decode(xdr, 4);
4302         if (unlikely(!p))
4303                 goto out_overflow;
4304         bmlen = be32_to_cpup(p);
4305         p = xdr_inline_decode(xdr, bmlen << 2);
4306         if (likely(p))
4307                 return 0;
4308 out_overflow:
4309         print_overflow_msg(__func__, xdr);
4310         return -EIO;
4311 }
4312
4313 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4314 {
4315         unsigned int savep;
4316         uint32_t attrlen, bitmap[3] = {0};
4317         int status;
4318
4319         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4320                 goto xdr_error;
4321         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4322                 goto xdr_error;
4323         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4324                 goto xdr_error;
4325         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4326                 goto xdr_error;
4327         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4328                                                  &res->fh_expire_type)) != 0)
4329                 goto xdr_error;
4330         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4331                 goto xdr_error;
4332         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4333                 goto xdr_error;
4334         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4335                 goto xdr_error;
4336         status = verify_attr_len(xdr, savep, attrlen);
4337 xdr_error:
4338         dprintk("%s: xdr returned %d!\n", __func__, -status);
4339         return status;
4340 }
4341
4342 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4343 {
4344         unsigned int savep;
4345         uint32_t attrlen, bitmap[3] = {0};
4346         int status;
4347
4348         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4349                 goto xdr_error;
4350         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4351                 goto xdr_error;
4352         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4353                 goto xdr_error;
4354
4355         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4356                 goto xdr_error;
4357         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4366                 goto xdr_error;
4367
4368         status = verify_attr_len(xdr, savep, attrlen);
4369 xdr_error:
4370         dprintk("%s: xdr returned %d!\n", __func__, -status);
4371         return status;
4372 }
4373
4374 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4375 {
4376         unsigned int savep;
4377         uint32_t attrlen, bitmap[3] = {0};
4378         int status;
4379
4380         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4381                 goto xdr_error;
4382         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4385                 goto xdr_error;
4386
4387         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4388                 goto xdr_error;
4389         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4390                 goto xdr_error;
4391
4392         status = verify_attr_len(xdr, savep, attrlen);
4393 xdr_error:
4394         dprintk("%s: xdr returned %d!\n", __func__, -status);
4395         return status;
4396 }
4397
4398 static int decode_threshold_hint(struct xdr_stream *xdr,
4399                                   uint32_t *bitmap,
4400                                   uint64_t *res,
4401                                   uint32_t hint_bit)
4402 {
4403         __be32 *p;
4404
4405         *res = 0;
4406         if (likely(bitmap[0] & hint_bit)) {
4407                 p = xdr_inline_decode(xdr, 8);
4408                 if (unlikely(!p))
4409                         goto out_overflow;
4410                 xdr_decode_hyper(p, res);
4411         }
4412         return 0;
4413 out_overflow:
4414         print_overflow_msg(__func__, xdr);
4415         return -EIO;
4416 }
4417
4418 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4419                                         struct nfs4_threshold *res)
4420 {
4421         __be32 *p;
4422         unsigned int savep;
4423         uint32_t bitmap[3] = {0,}, attrlen;
4424         int status;
4425
4426         /* layout type */
4427         p = xdr_inline_decode(xdr, 4);
4428         if (unlikely(!p)) {
4429                 print_overflow_msg(__func__, xdr);
4430                 return -EIO;
4431         }
4432         res->l_type = be32_to_cpup(p);
4433
4434         /* thi_hintset bitmap */
4435         status = decode_attr_bitmap(xdr, bitmap);
4436         if (status < 0)
4437                 goto xdr_error;
4438
4439         /* thi_hintlist length */
4440         status = decode_attr_length(xdr, &attrlen, &savep);
4441         if (status < 0)
4442                 goto xdr_error;
4443         /* thi_hintlist */
4444         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4445         if (status < 0)
4446                 goto xdr_error;
4447         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4448         if (status < 0)
4449                 goto xdr_error;
4450         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4451                                        THRESHOLD_RD_IO);
4452         if (status < 0)
4453                 goto xdr_error;
4454         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4455                                        THRESHOLD_WR_IO);
4456         if (status < 0)
4457                 goto xdr_error;
4458
4459         status = verify_attr_len(xdr, savep, attrlen);
4460         res->bm = bitmap[0];
4461
4462         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4463                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4464                 res->wr_io_sz);
4465 xdr_error:
4466         dprintk("%s ret=%d!\n", __func__, status);
4467         return status;
4468 }
4469
4470 /*
4471  * Thresholds on pNFS direct I/O vrs MDS I/O
4472  */
4473 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4474                                     uint32_t *bitmap,
4475                                     struct nfs4_threshold *res)
4476 {
4477         __be32 *p;
4478         int status = 0;
4479         uint32_t num;
4480
4481         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4482                 return -EIO;
4483         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4484                 /* Did the server return an unrequested attribute? */
4485                 if (unlikely(res == NULL))
4486                         return -EREMOTEIO;
4487                 p = xdr_inline_decode(xdr, 4);
4488                 if (unlikely(!p))
4489                         goto out_overflow;
4490                 num = be32_to_cpup(p);
4491                 if (num == 0)
4492                         return 0;
4493                 if (num > 1)
4494                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4495                                 "drivers per filesystem not supported\n",
4496                                 __func__);
4497
4498                 status = decode_first_threshold_item4(xdr, res);
4499                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4500         }
4501         return status;
4502 out_overflow:
4503         print_overflow_msg(__func__, xdr);
4504         return -EIO;
4505 }
4506
4507 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4508                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4509                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4510                 const struct nfs_server *server)
4511 {
4512         int status;
4513         umode_t fmode = 0;
4514         uint32_t type;
4515         int32_t err;
4516
4517         status = decode_attr_type(xdr, bitmap, &type);
4518         if (status < 0)
4519                 goto xdr_error;
4520         fattr->mode = 0;
4521         if (status != 0) {
4522                 fattr->mode |= nfs_type2fmt[type];
4523                 fattr->valid |= status;
4524         }
4525
4526         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4527         if (status < 0)
4528                 goto xdr_error;
4529         fattr->valid |= status;
4530
4531         status = decode_attr_size(xdr, bitmap, &fattr->size);
4532         if (status < 0)
4533                 goto xdr_error;
4534         fattr->valid |= status;
4535
4536         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4537         if (status < 0)
4538                 goto xdr_error;
4539         fattr->valid |= status;
4540
4541         err = 0;
4542         status = decode_attr_error(xdr, bitmap, &err);
4543         if (status < 0)
4544                 goto xdr_error;
4545
4546         status = decode_attr_filehandle(xdr, bitmap, fh);
4547         if (status < 0)
4548                 goto xdr_error;
4549
4550         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4551         if (status < 0)
4552                 goto xdr_error;
4553         fattr->valid |= status;
4554
4555         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4556         if (status < 0)
4557                 goto xdr_error;
4558         fattr->valid |= status;
4559
4560         status = decode_attr_mode(xdr, bitmap, &fmode);
4561         if (status < 0)
4562                 goto xdr_error;
4563         if (status != 0) {
4564                 fattr->mode |= fmode;
4565                 fattr->valid |= status;
4566         }
4567
4568         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4579         if (status < 0)
4580                 goto xdr_error;
4581         fattr->valid |= status;
4582
4583         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4584         if (status < 0)
4585                 goto xdr_error;
4586         fattr->valid |= status;
4587
4588         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4589         if (status < 0)
4590                 goto xdr_error;
4591         fattr->valid |= status;
4592
4593         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4594         if (status < 0)
4595                 goto xdr_error;
4596         fattr->valid |= status;
4597
4598         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->valid |= status;
4602
4603         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4604         if (status < 0)
4605                 goto xdr_error;
4606         fattr->valid |= status;
4607
4608         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4609         if (status < 0)
4610                 goto xdr_error;
4611         fattr->valid |= status;
4612
4613         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4614         if (status < 0)
4615                 goto xdr_error;
4616
4617         if (label) {
4618                 status = decode_attr_security_label(xdr, bitmap, label);
4619                 if (status < 0)
4620                         goto xdr_error;
4621                 fattr->valid |= status;
4622         }
4623
4624 xdr_error:
4625         dprintk("%s: xdr returned %d\n", __func__, -status);
4626         return status;
4627 }
4628
4629 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4630                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4631                 struct nfs4_label *label, const struct nfs_server *server)
4632 {
4633         unsigned int savep;
4634         uint32_t attrlen,
4635                  bitmap[3] = {0};
4636         int status;
4637
4638         status = decode_op_hdr(xdr, OP_GETATTR);
4639         if (status < 0)
4640                 goto xdr_error;
4641
4642         status = decode_attr_bitmap(xdr, bitmap);
4643         if (status < 0)
4644                 goto xdr_error;
4645
4646         status = decode_attr_length(xdr, &attrlen, &savep);
4647         if (status < 0)
4648                 goto xdr_error;
4649
4650         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4651                                         label, server);
4652         if (status < 0)
4653                 goto xdr_error;
4654
4655         status = verify_attr_len(xdr, savep, attrlen);
4656 xdr_error:
4657         dprintk("%s: xdr returned %d\n", __func__, -status);
4658         return status;
4659 }
4660
4661 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4662                 struct nfs4_label *label, const struct nfs_server *server)
4663 {
4664         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4665 }
4666
4667 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4668                 const struct nfs_server *server)
4669 {
4670         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4671 }
4672
4673 /*
4674  * Decode potentially multiple layout types. Currently we only support
4675  * one layout driver per file system.
4676  */
4677 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4678                                          uint32_t *layouttype)
4679 {
4680         __be32 *p;
4681         int num;
4682
4683         p = xdr_inline_decode(xdr, 4);
4684         if (unlikely(!p))
4685                 goto out_overflow;
4686         num = be32_to_cpup(p);
4687
4688         /* pNFS is not supported by the underlying file system */
4689         if (num == 0) {
4690                 *layouttype = 0;
4691                 return 0;
4692         }
4693         if (num > 1)
4694                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4695                         "drivers per filesystem not supported\n", __func__);
4696
4697         /* Decode and set first layout type, move xdr->p past unused types */
4698         p = xdr_inline_decode(xdr, num * 4);
4699         if (unlikely(!p))
4700                 goto out_overflow;
4701         *layouttype = be32_to_cpup(p);
4702         return 0;
4703 out_overflow:
4704         print_overflow_msg(__func__, xdr);
4705         return -EIO;
4706 }
4707
4708 /*
4709  * The type of file system exported.
4710  * Note we must ensure that layouttype is set in any non-error case.
4711  */
4712 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4713                                 uint32_t *layouttype)
4714 {
4715         int status = 0;
4716
4717         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4718         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4719                 return -EIO;
4720         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4721                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4722                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4723         } else
4724                 *layouttype = 0;
4725         return status;
4726 }
4727
4728 /*
4729  * The prefered block size for layout directed io
4730  */
4731 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4732                                       uint32_t *res)
4733 {
4734         __be32 *p;
4735
4736         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4737         *res = 0;
4738         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4739                 p = xdr_inline_decode(xdr, 4);
4740                 if (unlikely(!p)) {
4741                         print_overflow_msg(__func__, xdr);
4742                         return -EIO;
4743                 }
4744                 *res = be32_to_cpup(p);
4745                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4746         }
4747         return 0;
4748 }
4749
4750 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4751 {
4752         unsigned int savep;
4753         uint32_t attrlen, bitmap[3];
4754         int status;
4755
4756         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4757                 goto xdr_error;
4758         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4759                 goto xdr_error;
4760         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4761                 goto xdr_error;
4762
4763         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4764
4765         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4766                 goto xdr_error;
4767         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4768                 goto xdr_error;
4769         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4770                 goto xdr_error;
4771         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4772         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4773                 goto xdr_error;
4774         fsinfo->wtpref = fsinfo->wtmax;
4775         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4776         if (status != 0)
4777                 goto xdr_error;
4778         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4779         if (status != 0)
4780                 goto xdr_error;
4781         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4782         if (status)
4783                 goto xdr_error;
4784
4785         status = verify_attr_len(xdr, savep, attrlen);
4786 xdr_error:
4787         dprintk("%s: xdr returned %d!\n", __func__, -status);
4788         return status;
4789 }
4790
4791 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4792 {
4793         __be32 *p;
4794         uint32_t len;
4795         int status;
4796
4797         /* Zero handle first to allow comparisons */
4798         memset(fh, 0, sizeof(*fh));
4799
4800         status = decode_op_hdr(xdr, OP_GETFH);
4801         if (status)
4802                 return status;
4803
4804         p = xdr_inline_decode(xdr, 4);
4805         if (unlikely(!p))
4806                 goto out_overflow;
4807         len = be32_to_cpup(p);
4808         if (len > NFS4_FHSIZE)
4809                 return -EIO;
4810         fh->size = len;
4811         p = xdr_inline_decode(xdr, len);
4812         if (unlikely(!p))
4813                 goto out_overflow;
4814         memcpy(fh->data, p, len);
4815         return 0;
4816 out_overflow:
4817         print_overflow_msg(__func__, xdr);
4818         return -EIO;
4819 }
4820
4821 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4822 {
4823         int status;
4824
4825         status = decode_op_hdr(xdr, OP_LINK);
4826         if (status)
4827                 return status;
4828         return decode_change_info(xdr, cinfo);
4829 }
4830
4831 /*
4832  * We create the owner, so we know a proper owner.id length is 4.
4833  */
4834 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4835 {
4836         uint64_t offset, length, clientid;
4837         __be32 *p;
4838         uint32_t namelen, type;
4839
4840         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4841         if (unlikely(!p))
4842                 goto out_overflow;
4843         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4844         p = xdr_decode_hyper(p, &length);
4845         type = be32_to_cpup(p++); /* 4 byte read */
4846         if (fl != NULL) { /* manipulate file lock */
4847                 fl->fl_start = (loff_t)offset;
4848                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4849                 if (length == ~(uint64_t)0)
4850                         fl->fl_end = OFFSET_MAX;
4851                 fl->fl_type = F_WRLCK;
4852                 if (type & 1)
4853                         fl->fl_type = F_RDLCK;
4854                 fl->fl_pid = 0;
4855         }
4856         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4857         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4858         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4859         if (likely(p))
4860                 return -NFS4ERR_DENIED;
4861 out_overflow:
4862         print_overflow_msg(__func__, xdr);
4863         return -EIO;
4864 }
4865
4866 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4867 {
4868         int status;
4869
4870         status = decode_op_hdr(xdr, OP_LOCK);
4871         if (status == -EIO)
4872                 goto out;
4873         if (status == 0) {
4874                 status = decode_stateid(xdr, &res->stateid);
4875                 if (unlikely(status))
4876                         goto out;
4877         } else if (status == -NFS4ERR_DENIED)
4878                 status = decode_lock_denied(xdr, NULL);
4879         if (res->open_seqid != NULL)
4880                 nfs_increment_open_seqid(status, res->open_seqid);
4881         nfs_increment_lock_seqid(status, res->lock_seqid);
4882 out:
4883         return status;
4884 }
4885
4886 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4887 {
4888         int status;
4889         status = decode_op_hdr(xdr, OP_LOCKT);
4890         if (status == -NFS4ERR_DENIED)
4891                 return decode_lock_denied(xdr, res->denied);
4892         return status;
4893 }
4894
4895 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4896 {
4897         int status;
4898
4899         status = decode_op_hdr(xdr, OP_LOCKU);
4900         if (status != -EIO)
4901                 nfs_increment_lock_seqid(status, res->seqid);
4902         if (status == 0)
4903                 status = decode_stateid(xdr, &res->stateid);
4904         return status;
4905 }
4906
4907 static int decode_release_lockowner(struct xdr_stream *xdr)
4908 {
4909         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4910 }
4911
4912 static int decode_lookup(struct xdr_stream *xdr)
4913 {
4914         return decode_op_hdr(xdr, OP_LOOKUP);
4915 }
4916
4917 /* This is too sick! */
4918 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4919 {
4920         __be32 *p;
4921         uint32_t limit_type, nblocks, blocksize;
4922
4923         p = xdr_inline_decode(xdr, 12);
4924         if (unlikely(!p))
4925                 goto out_overflow;
4926         limit_type = be32_to_cpup(p++);
4927         switch (limit_type) {
4928         case 1:
4929                 xdr_decode_hyper(p, maxsize);
4930                 break;
4931         case 2:
4932                 nblocks = be32_to_cpup(p++);
4933                 blocksize = be32_to_cpup(p);
4934                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4935         }
4936         return 0;
4937 out_overflow:
4938         print_overflow_msg(__func__, xdr);
4939         return -EIO;
4940 }
4941
4942 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4943 {
4944         __be32 *p;
4945         uint32_t delegation_type;
4946         int status;
4947
4948         p = xdr_inline_decode(xdr, 4);
4949         if (unlikely(!p))
4950                 goto out_overflow;
4951         delegation_type = be32_to_cpup(p);
4952         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4953                 res->delegation_type = 0;
4954                 return 0;
4955         }
4956         status = decode_stateid(xdr, &res->delegation);
4957         if (unlikely(status))
4958                 return status;
4959         p = xdr_inline_decode(xdr, 4);
4960         if (unlikely(!p))
4961                 goto out_overflow;
4962         res->do_recall = be32_to_cpup(p);
4963
4964         switch (delegation_type) {
4965         case NFS4_OPEN_DELEGATE_READ:
4966                 res->delegation_type = FMODE_READ;
4967                 break;
4968         case NFS4_OPEN_DELEGATE_WRITE:
4969                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4970                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4971                                 return -EIO;
4972         }
4973         return decode_ace(xdr, NULL, res->server->nfs_client);
4974 out_overflow:
4975         print_overflow_msg(__func__, xdr);
4976         return -EIO;
4977 }
4978
4979 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4980 {
4981         __be32 *p;
4982         uint32_t savewords, bmlen, i;
4983         int status;
4984
4985         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4986                 return status;
4987         nfs_increment_open_seqid(status, res->seqid);
4988         if (status)
4989                 return status;
4990         status = decode_stateid(xdr, &res->stateid);
4991         if (unlikely(status))
4992                 return status;
4993
4994         decode_change_info(xdr, &res->cinfo);
4995
4996         p = xdr_inline_decode(xdr, 8);
4997         if (unlikely(!p))
4998                 goto out_overflow;
4999         res->rflags = be32_to_cpup(p++);
5000         bmlen = be32_to_cpup(p);
5001         if (bmlen > 10)
5002                 goto xdr_error;
5003
5004         p = xdr_inline_decode(xdr, bmlen << 2);
5005         if (unlikely(!p))
5006                 goto out_overflow;
5007         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5008         for (i = 0; i < savewords; ++i)
5009                 res->attrset[i] = be32_to_cpup(p++);
5010         for (; i < NFS4_BITMAP_SIZE; i++)
5011                 res->attrset[i] = 0;
5012
5013         return decode_delegation(xdr, res);
5014 xdr_error:
5015         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5016         return -EIO;
5017 out_overflow:
5018         print_overflow_msg(__func__, xdr);
5019         return -EIO;
5020 }
5021
5022 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5023 {
5024         int status;
5025
5026         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5027         if (status != -EIO)
5028                 nfs_increment_open_seqid(status, res->seqid);
5029         if (!status)
5030                 status = decode_stateid(xdr, &res->stateid);
5031         return status;
5032 }
5033
5034 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5035 {
5036         int status;
5037
5038         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5039         if (status != -EIO)
5040                 nfs_increment_open_seqid(status, res->seqid);
5041         if (!status)
5042                 status = decode_stateid(xdr, &res->stateid);
5043         return status;
5044 }
5045
5046 static int decode_putfh(struct xdr_stream *xdr)
5047 {
5048         return decode_op_hdr(xdr, OP_PUTFH);
5049 }
5050
5051 static int decode_putrootfh(struct xdr_stream *xdr)
5052 {
5053         return decode_op_hdr(xdr, OP_PUTROOTFH);
5054 }
5055
5056 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5057                        struct nfs_pgio_res *res)
5058 {
5059         __be32 *p;
5060         uint32_t count, eof, recvd;
5061         int status;
5062
5063         status = decode_op_hdr(xdr, OP_READ);
5064         if (status)
5065                 return status;
5066         p = xdr_inline_decode(xdr, 8);
5067         if (unlikely(!p))
5068                 goto out_overflow;
5069         eof = be32_to_cpup(p++);
5070         count = be32_to_cpup(p);
5071         recvd = xdr_read_pages(xdr, count);
5072         if (count > recvd) {
5073                 dprintk("NFS: server cheating in read reply: "
5074                                 "count %u > recvd %u\n", count, recvd);
5075                 count = recvd;
5076                 eof = 0;
5077         }
5078         res->eof = eof;
5079         res->count = count;
5080         return 0;
5081 out_overflow:
5082         print_overflow_msg(__func__, xdr);
5083         return -EIO;
5084 }
5085
5086 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5087 {
5088         int             status;
5089         __be32          verf[2];
5090
5091         status = decode_op_hdr(xdr, OP_READDIR);
5092         if (!status)
5093                 status = decode_verifier(xdr, readdir->verifier.data);
5094         if (unlikely(status))
5095                 return status;
5096         memcpy(verf, readdir->verifier.data, sizeof(verf));
5097         dprintk("%s: verifier = %08x:%08x\n",
5098                         __func__, verf[0], verf[1]);
5099         return xdr_read_pages(xdr, xdr->buf->page_len);
5100 }
5101
5102 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5103 {
5104         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5105         u32 len, recvd;
5106         __be32 *p;
5107         int status;
5108
5109         status = decode_op_hdr(xdr, OP_READLINK);
5110         if (status)
5111                 return status;
5112
5113         /* Convert length of symlink */
5114         p = xdr_inline_decode(xdr, 4);
5115         if (unlikely(!p))
5116                 goto out_overflow;
5117         len = be32_to_cpup(p);
5118         if (len >= rcvbuf->page_len || len <= 0) {
5119                 dprintk("nfs: server returned giant symlink!\n");
5120                 return -ENAMETOOLONG;
5121         }
5122         recvd = xdr_read_pages(xdr, len);
5123         if (recvd < len) {
5124                 dprintk("NFS: server cheating in readlink reply: "
5125                                 "count %u > recvd %u\n", len, recvd);
5126                 return -EIO;
5127         }
5128         /*
5129          * The XDR encode routine has set things up so that
5130          * the link text will be copied directly into the
5131          * buffer.  We just have to do overflow-checking,
5132          * and and null-terminate the text (the VFS expects
5133          * null-termination).
5134          */
5135         xdr_terminate_string(rcvbuf, len);
5136         return 0;
5137 out_overflow:
5138         print_overflow_msg(__func__, xdr);
5139         return -EIO;
5140 }
5141
5142 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5143 {
5144         int status;
5145
5146         status = decode_op_hdr(xdr, OP_REMOVE);
5147         if (status)
5148                 goto out;
5149         status = decode_change_info(xdr, cinfo);
5150 out:
5151         return status;
5152 }
5153
5154 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5155               struct nfs4_change_info *new_cinfo)
5156 {
5157         int status;
5158
5159         status = decode_op_hdr(xdr, OP_RENAME);
5160         if (status)
5161                 goto out;
5162         if ((status = decode_change_info(xdr, old_cinfo)))
5163                 goto out;
5164         status = decode_change_info(xdr, new_cinfo);
5165 out:
5166         return status;
5167 }
5168
5169 static int decode_renew(struct xdr_stream *xdr)
5170 {
5171         return decode_op_hdr(xdr, OP_RENEW);
5172 }
5173
5174 static int
5175 decode_restorefh(struct xdr_stream *xdr)
5176 {
5177         return decode_op_hdr(xdr, OP_RESTOREFH);
5178 }
5179
5180 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5181                          struct nfs_getaclres *res)
5182 {
5183         unsigned int savep;
5184         uint32_t attrlen,
5185                  bitmap[3] = {0};
5186         int status;
5187         unsigned int pg_offset;
5188
5189         res->acl_len = 0;
5190         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5191                 goto out;
5192
5193         xdr_enter_page(xdr, xdr->buf->page_len);
5194
5195         /* Calculate the offset of the page data */
5196         pg_offset = xdr->buf->head[0].iov_len;
5197
5198         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5199                 goto out;
5200         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5201                 goto out;
5202
5203         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5204                 return -EIO;
5205         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5206
5207                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5208                  * are stored with the acl data to handle the problem of
5209                  * variable length bitmaps.*/
5210                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5211                 res->acl_len = attrlen;
5212
5213                 /* Check for receive buffer overflow */
5214                 if (res->acl_len > (xdr->nwords << 2) ||
5215                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5216                         res->acl_flags |= NFS4_ACL_TRUNC;
5217                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5218                                         attrlen, xdr->nwords << 2);
5219                 }
5220         } else
5221                 status = -EOPNOTSUPP;
5222
5223 out:
5224         return status;
5225 }
5226
5227 static int
5228 decode_savefh(struct xdr_stream *xdr)
5229 {
5230         return decode_op_hdr(xdr, OP_SAVEFH);
5231 }
5232
5233 static int decode_setattr(struct xdr_stream *xdr)
5234 {
5235         __be32 *p;
5236         uint32_t bmlen;
5237         int status;
5238
5239         status = decode_op_hdr(xdr, OP_SETATTR);
5240         if (status)
5241                 return status;
5242         p = xdr_inline_decode(xdr, 4);
5243         if (unlikely(!p))
5244                 goto out_overflow;
5245         bmlen = be32_to_cpup(p);
5246         p = xdr_inline_decode(xdr, bmlen << 2);
5247         if (likely(p))
5248                 return 0;
5249 out_overflow:
5250         print_overflow_msg(__func__, xdr);
5251         return -EIO;
5252 }
5253
5254 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5255 {
5256         __be32 *p;
5257         uint32_t opnum;
5258         int32_t nfserr;
5259
5260         p = xdr_inline_decode(xdr, 8);
5261         if (unlikely(!p))
5262                 goto out_overflow;
5263         opnum = be32_to_cpup(p++);
5264         if (opnum != OP_SETCLIENTID) {
5265                 dprintk("nfs: decode_setclientid: Server returned operation"
5266                         " %d\n", opnum);
5267                 return -EIO;
5268         }
5269         nfserr = be32_to_cpup(p);
5270         if (nfserr == NFS_OK) {
5271                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5272                 if (unlikely(!p))
5273                         goto out_overflow;
5274                 p = xdr_decode_hyper(p, &res->clientid);
5275                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5276         } else if (nfserr == NFSERR_CLID_INUSE) {
5277                 uint32_t len;
5278
5279                 /* skip netid string */
5280                 p = xdr_inline_decode(xdr, 4);
5281                 if (unlikely(!p))
5282                         goto out_overflow;
5283                 len = be32_to_cpup(p);
5284                 p = xdr_inline_decode(xdr, len);
5285                 if (unlikely(!p))
5286                         goto out_overflow;
5287
5288                 /* skip uaddr string */
5289                 p = xdr_inline_decode(xdr, 4);
5290                 if (unlikely(!p))
5291                         goto out_overflow;
5292                 len = be32_to_cpup(p);
5293                 p = xdr_inline_decode(xdr, len);
5294                 if (unlikely(!p))
5295                         goto out_overflow;
5296                 return -NFSERR_CLID_INUSE;
5297         } else
5298                 return nfs4_stat_to_errno(nfserr);
5299
5300         return 0;
5301 out_overflow:
5302         print_overflow_msg(__func__, xdr);
5303         return -EIO;
5304 }
5305
5306 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5307 {
5308         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5309 }
5310
5311 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5312 {
5313         __be32 *p;
5314         int status;
5315
5316         status = decode_op_hdr(xdr, OP_WRITE);
5317         if (status)
5318                 return status;
5319
5320         p = xdr_inline_decode(xdr, 8);
5321         if (unlikely(!p))
5322                 goto out_overflow;
5323         res->count = be32_to_cpup(p++);
5324         res->verf->committed = be32_to_cpup(p++);
5325         return decode_write_verifier(xdr, &res->verf->verifier);
5326 out_overflow:
5327         print_overflow_msg(__func__, xdr);
5328         return -EIO;
5329 }
5330
5331 static int decode_delegreturn(struct xdr_stream *xdr)
5332 {
5333         return decode_op_hdr(xdr, OP_DELEGRETURN);
5334 }
5335
5336 static int decode_secinfo_gss(struct xdr_stream *xdr,
5337                               struct nfs4_secinfo4 *flavor)
5338 {
5339         u32 oid_len;
5340         __be32 *p;
5341
5342         p = xdr_inline_decode(xdr, 4);
5343         if (unlikely(!p))
5344                 goto out_overflow;
5345         oid_len = be32_to_cpup(p);
5346         if (oid_len > GSS_OID_MAX_LEN)
5347                 goto out_err;
5348
5349         p = xdr_inline_decode(xdr, oid_len);
5350         if (unlikely(!p))
5351                 goto out_overflow;
5352         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5353         flavor->flavor_info.oid.len = oid_len;
5354
5355         p = xdr_inline_decode(xdr, 8);
5356         if (unlikely(!p))
5357                 goto out_overflow;
5358         flavor->flavor_info.qop = be32_to_cpup(p++);
5359         flavor->flavor_info.service = be32_to_cpup(p);
5360
5361         return 0;
5362
5363 out_overflow:
5364         print_overflow_msg(__func__, xdr);
5365         return -EIO;
5366 out_err:
5367         return -EINVAL;
5368 }
5369
5370 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5371 {
5372         struct nfs4_secinfo4 *sec_flavor;
5373         unsigned int i, num_flavors;
5374         int status;
5375         __be32 *p;
5376
5377         p = xdr_inline_decode(xdr, 4);
5378         if (unlikely(!p))
5379                 goto out_overflow;
5380
5381         res->flavors->num_flavors = 0;
5382         num_flavors = be32_to_cpup(p);
5383
5384         for (i = 0; i < num_flavors; i++) {
5385                 sec_flavor = &res->flavors->flavors[i];
5386                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5387                         break;
5388
5389                 p = xdr_inline_decode(xdr, 4);
5390                 if (unlikely(!p))
5391                         goto out_overflow;
5392                 sec_flavor->flavor = be32_to_cpup(p);
5393
5394                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5395                         status = decode_secinfo_gss(xdr, sec_flavor);
5396                         if (status)
5397                                 goto out;
5398                 }
5399                 res->flavors->num_flavors++;
5400         }
5401
5402         status = 0;
5403 out:
5404         return status;
5405 out_overflow:
5406         print_overflow_msg(__func__, xdr);
5407         return -EIO;
5408 }
5409
5410 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5411 {
5412         int status = decode_op_hdr(xdr, OP_SECINFO);
5413         if (status)
5414                 return status;
5415         return decode_secinfo_common(xdr, res);
5416 }
5417
5418 #if defined(CONFIG_NFS_V4_1)
5419 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5420 {
5421         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5422         if (status)
5423                 return status;
5424         return decode_secinfo_common(xdr, res);
5425 }
5426
5427 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5428 {
5429         __be32 *p;
5430         uint32_t bitmap_words;
5431         unsigned int i;
5432
5433         p = xdr_inline_decode(xdr, 4);
5434         bitmap_words = be32_to_cpup(p++);
5435         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5436                 return -EIO;
5437         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5438         for (i = 0; i < bitmap_words; i++)
5439                 op_map->u.words[i] = be32_to_cpup(p++);
5440
5441         return 0;
5442 }
5443
5444 static int decode_exchange_id(struct xdr_stream *xdr,
5445                               struct nfs41_exchange_id_res *res)
5446 {
5447         __be32 *p;
5448         uint32_t dummy;
5449         char *dummy_str;
5450         int status;
5451         uint32_t impl_id_count;
5452
5453         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5454         if (status)
5455                 return status;
5456
5457         p = xdr_inline_decode(xdr, 8);
5458         if (unlikely(!p))
5459                 goto out_overflow;
5460         xdr_decode_hyper(p, &res->clientid);
5461         p = xdr_inline_decode(xdr, 12);
5462         if (unlikely(!p))
5463                 goto out_overflow;
5464         res->seqid = be32_to_cpup(p++);
5465         res->flags = be32_to_cpup(p++);
5466
5467         res->state_protect.how = be32_to_cpup(p);
5468         switch (res->state_protect.how) {
5469         case SP4_NONE:
5470                 break;
5471         case SP4_MACH_CRED:
5472                 status = decode_op_map(xdr, &res->state_protect.enforce);
5473                 if (status)
5474                         return status;
5475                 status = decode_op_map(xdr, &res->state_protect.allow);
5476                 if (status)
5477                         return status;
5478                 break;
5479         default:
5480                 WARN_ON_ONCE(1);
5481                 return -EIO;
5482         }
5483
5484         /* server_owner4.so_minor_id */
5485         p = xdr_inline_decode(xdr, 8);
5486         if (unlikely(!p))
5487                 goto out_overflow;
5488         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5489
5490         /* server_owner4.so_major_id */
5491         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5492         if (unlikely(status))
5493                 return status;
5494         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5495                 return -EIO;
5496         memcpy(res->server_owner->major_id, dummy_str, dummy);
5497         res->server_owner->major_id_sz = dummy;
5498
5499         /* server_scope4 */
5500         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5501         if (unlikely(status))
5502                 return status;
5503         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5504                 return -EIO;
5505         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5506         res->server_scope->server_scope_sz = dummy;
5507
5508         /* Implementation Id */
5509         p = xdr_inline_decode(xdr, 4);
5510         if (unlikely(!p))
5511                 goto out_overflow;
5512         impl_id_count = be32_to_cpup(p++);
5513
5514         if (impl_id_count) {
5515                 /* nii_domain */
5516                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5517                 if (unlikely(status))
5518                         return status;
5519                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5520                         return -EIO;
5521                 memcpy(res->impl_id->domain, dummy_str, dummy);
5522
5523                 /* nii_name */
5524                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5525                 if (unlikely(status))
5526                         return status;
5527                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5528                         return -EIO;
5529                 memcpy(res->impl_id->name, dummy_str, dummy);
5530
5531                 /* nii_date */
5532                 p = xdr_inline_decode(xdr, 12);
5533                 if (unlikely(!p))
5534                         goto out_overflow;
5535                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5536                 res->impl_id->date.nseconds = be32_to_cpup(p);
5537
5538                 /* if there's more than one entry, ignore the rest */
5539         }
5540         return 0;
5541 out_overflow:
5542         print_overflow_msg(__func__, xdr);
5543         return -EIO;
5544 }
5545
5546 static int decode_chan_attrs(struct xdr_stream *xdr,
5547                              struct nfs4_channel_attrs *attrs)
5548 {
5549         __be32 *p;
5550         u32 nr_attrs, val;
5551
5552         p = xdr_inline_decode(xdr, 28);
5553         if (unlikely(!p))
5554                 goto out_overflow;
5555         val = be32_to_cpup(p++);        /* headerpadsz */
5556         if (val)
5557                 return -EINVAL;         /* no support for header padding yet */
5558         attrs->max_rqst_sz = be32_to_cpup(p++);
5559         attrs->max_resp_sz = be32_to_cpup(p++);
5560         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5561         attrs->max_ops = be32_to_cpup(p++);
5562         attrs->max_reqs = be32_to_cpup(p++);
5563         nr_attrs = be32_to_cpup(p);
5564         if (unlikely(nr_attrs > 1)) {
5565                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5566                         "count %u\n", __func__, nr_attrs);
5567                 return -EINVAL;
5568         }
5569         if (nr_attrs == 1) {
5570                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5571                 if (unlikely(!p))
5572                         goto out_overflow;
5573         }
5574         return 0;
5575 out_overflow:
5576         print_overflow_msg(__func__, xdr);
5577         return -EIO;
5578 }
5579
5580 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5581 {
5582         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5583 }
5584
5585 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5586                                 struct nfs41_bind_conn_to_session_res *res)
5587 {
5588         __be32 *p;
5589         int status;
5590
5591         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5592         if (!status)
5593                 status = decode_sessionid(xdr, &res->session->sess_id);
5594         if (unlikely(status))
5595                 return status;
5596
5597         /* dir flags, rdma mode bool */
5598         p = xdr_inline_decode(xdr, 8);
5599         if (unlikely(!p))
5600                 goto out_overflow;
5601
5602         res->dir = be32_to_cpup(p++);
5603         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5604                 return -EIO;
5605         if (be32_to_cpup(p) == 0)
5606                 res->use_conn_in_rdma_mode = false;
5607         else
5608                 res->use_conn_in_rdma_mode = true;
5609
5610         return 0;
5611 out_overflow:
5612         print_overflow_msg(__func__, xdr);
5613         return -EIO;
5614 }
5615
5616 static int decode_create_session(struct xdr_stream *xdr,
5617                                  struct nfs41_create_session_res *res)
5618 {
5619         __be32 *p;
5620         int status;
5621         struct nfs_client *clp = res->client;
5622         struct nfs4_session *session = clp->cl_session;
5623
5624         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5625         if (!status)
5626                 status = decode_sessionid(xdr, &session->sess_id);
5627         if (unlikely(status))
5628                 return status;
5629
5630         /* seqid, flags */
5631         p = xdr_inline_decode(xdr, 8);
5632         if (unlikely(!p))
5633                 goto out_overflow;
5634         clp->cl_seqid = be32_to_cpup(p++);
5635         session->flags = be32_to_cpup(p);
5636
5637         /* Channel attributes */
5638         status = decode_chan_attrs(xdr, &session->fc_attrs);
5639         if (!status)
5640                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5641         return status;
5642 out_overflow:
5643         print_overflow_msg(__func__, xdr);
5644         return -EIO;
5645 }
5646
5647 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5648 {
5649         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5650 }
5651
5652 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5653 {
5654         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5655 }
5656
5657 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5658 {
5659         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5660 }
5661 #endif /* CONFIG_NFS_V4_1 */
5662
5663 static int decode_sequence(struct xdr_stream *xdr,
5664                            struct nfs4_sequence_res *res,
5665                            struct rpc_rqst *rqstp)
5666 {
5667 #if defined(CONFIG_NFS_V4_1)
5668         struct nfs4_session *session;
5669         struct nfs4_sessionid id;
5670         u32 dummy;
5671         int status;
5672         __be32 *p;
5673
5674         if (res->sr_slot == NULL)
5675                 return 0;
5676         if (!res->sr_slot->table->session)
5677                 return 0;
5678
5679         status = decode_op_hdr(xdr, OP_SEQUENCE);
5680         if (!status)
5681                 status = decode_sessionid(xdr, &id);
5682         if (unlikely(status))
5683                 goto out_err;
5684
5685         /*
5686          * If the server returns different values for sessionID, slotID or
5687          * sequence number, the server is looney tunes.
5688          */
5689         status = -EREMOTEIO;
5690         session = res->sr_slot->table->session;
5691
5692         if (memcmp(id.data, session->sess_id.data,
5693                    NFS4_MAX_SESSIONID_LEN)) {
5694                 dprintk("%s Invalid session id\n", __func__);
5695                 goto out_err;
5696         }
5697
5698         p = xdr_inline_decode(xdr, 20);
5699         if (unlikely(!p))
5700                 goto out_overflow;
5701
5702         /* seqid */
5703         dummy = be32_to_cpup(p++);
5704         if (dummy != res->sr_slot->seq_nr) {
5705                 dprintk("%s Invalid sequence number\n", __func__);
5706                 goto out_err;
5707         }
5708         /* slot id */
5709         dummy = be32_to_cpup(p++);
5710         if (dummy != res->sr_slot->slot_nr) {
5711                 dprintk("%s Invalid slot id\n", __func__);
5712                 goto out_err;
5713         }
5714         /* highest slot id */
5715         res->sr_highest_slotid = be32_to_cpup(p++);
5716         /* target highest slot id */
5717         res->sr_target_highest_slotid = be32_to_cpup(p++);
5718         /* result flags */
5719         res->sr_status_flags = be32_to_cpup(p);
5720         status = 0;
5721 out_err:
5722         res->sr_status = status;
5723         return status;
5724 out_overflow:
5725         print_overflow_msg(__func__, xdr);
5726         status = -EIO;
5727         goto out_err;
5728 #else  /* CONFIG_NFS_V4_1 */
5729         return 0;
5730 #endif /* CONFIG_NFS_V4_1 */
5731 }
5732
5733 #if defined(CONFIG_NFS_V4_1)
5734 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5735                                 struct pnfs_device *pdev)
5736 {
5737         __be32 *p;
5738         uint32_t len, type;
5739         int status;
5740
5741         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5742         if (status) {
5743                 if (status == -ETOOSMALL) {
5744                         p = xdr_inline_decode(xdr, 4);
5745                         if (unlikely(!p))
5746                                 goto out_overflow;
5747                         pdev->mincount = be32_to_cpup(p);
5748                         dprintk("%s: Min count too small. mincnt = %u\n",
5749                                 __func__, pdev->mincount);
5750                 }
5751                 return status;
5752         }
5753
5754         p = xdr_inline_decode(xdr, 8);
5755         if (unlikely(!p))
5756                 goto out_overflow;
5757         type = be32_to_cpup(p++);
5758         if (type != pdev->layout_type) {
5759                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5760                         __func__, pdev->layout_type, type);
5761                 return -EINVAL;
5762         }
5763         /*
5764          * Get the length of the opaque device_addr4. xdr_read_pages places
5765          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5766          * and places the remaining xdr data in xdr_buf->tail
5767          */
5768         pdev->mincount = be32_to_cpup(p);
5769         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5770                 goto out_overflow;
5771
5772         /* Parse notification bitmap, verifying that it is zero. */
5773         p = xdr_inline_decode(xdr, 4);
5774         if (unlikely(!p))
5775                 goto out_overflow;
5776         len = be32_to_cpup(p);
5777         if (len) {
5778                 uint32_t i;
5779
5780                 p = xdr_inline_decode(xdr, 4 * len);
5781                 if (unlikely(!p))
5782                         goto out_overflow;
5783
5784                 if (be32_to_cpup(p++) &
5785                     ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5786                         dprintk("%s: unsupported notification\n",
5787                                 __func__);
5788                 }
5789
5790                 for (i = 1; i < len; i++) {
5791                         if (be32_to_cpup(p++)) {
5792                                 dprintk("%s: unsupported notification\n",
5793                                         __func__);
5794                                 return -EIO;
5795                         }
5796                 }
5797         }
5798         return 0;
5799 out_overflow:
5800         print_overflow_msg(__func__, xdr);
5801         return -EIO;
5802 }
5803
5804 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5805                             struct nfs4_layoutget_res *res)
5806 {
5807         __be32 *p;
5808         int status;
5809         u32 layout_count;
5810         u32 recvd;
5811
5812         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5813         if (status)
5814                 return status;
5815         p = xdr_inline_decode(xdr, 4);
5816         if (unlikely(!p))
5817                 goto out_overflow;
5818         res->return_on_close = be32_to_cpup(p);
5819         decode_stateid(xdr, &res->stateid);
5820         p = xdr_inline_decode(xdr, 4);
5821         if (unlikely(!p))
5822                 goto out_overflow;
5823         layout_count = be32_to_cpup(p);
5824         if (!layout_count) {
5825                 dprintk("%s: server responded with empty layout array\n",
5826                         __func__);
5827                 return -EINVAL;
5828         }
5829
5830         p = xdr_inline_decode(xdr, 28);
5831         if (unlikely(!p))
5832                 goto out_overflow;
5833         p = xdr_decode_hyper(p, &res->range.offset);
5834         p = xdr_decode_hyper(p, &res->range.length);
5835         res->range.iomode = be32_to_cpup(p++);
5836         res->type = be32_to_cpup(p++);
5837         res->layoutp->len = be32_to_cpup(p);
5838
5839         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5840                 __func__,
5841                 (unsigned long)res->range.offset,
5842                 (unsigned long)res->range.length,
5843                 res->range.iomode,
5844                 res->type,
5845                 res->layoutp->len);
5846
5847         recvd = xdr_read_pages(xdr, res->layoutp->len);
5848         if (res->layoutp->len > recvd) {
5849                 dprintk("NFS: server cheating in layoutget reply: "
5850                                 "layout len %u > recvd %u\n",
5851                                 res->layoutp->len, recvd);
5852                 return -EINVAL;
5853         }
5854
5855         if (layout_count > 1) {
5856                 /* We only handle a length one array at the moment.  Any
5857                  * further entries are just ignored.  Note that this means
5858                  * the client may see a response that is less than the
5859                  * minimum it requested.
5860                  */
5861                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5862                         __func__, layout_count);
5863         }
5864
5865         return 0;
5866 out_overflow:
5867         print_overflow_msg(__func__, xdr);
5868         return -EIO;
5869 }
5870
5871 static int decode_layoutreturn(struct xdr_stream *xdr,
5872                                struct nfs4_layoutreturn_res *res)
5873 {
5874         __be32 *p;
5875         int status;
5876
5877         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5878         if (status)
5879                 return status;
5880         p = xdr_inline_decode(xdr, 4);
5881         if (unlikely(!p))
5882                 goto out_overflow;
5883         res->lrs_present = be32_to_cpup(p);
5884         if (res->lrs_present)
5885                 status = decode_stateid(xdr, &res->stateid);
5886         return status;
5887 out_overflow:
5888         print_overflow_msg(__func__, xdr);
5889         return -EIO;
5890 }
5891
5892 static int decode_layoutcommit(struct xdr_stream *xdr,
5893                                struct rpc_rqst *req,
5894                                struct nfs4_layoutcommit_res *res)
5895 {
5896         __be32 *p;
5897         __u32 sizechanged;
5898         int status;
5899
5900         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5901         res->status = status;
5902         if (status)
5903                 return status;
5904
5905         p = xdr_inline_decode(xdr, 4);
5906         if (unlikely(!p))
5907                 goto out_overflow;
5908         sizechanged = be32_to_cpup(p);
5909
5910         if (sizechanged) {
5911                 /* throw away new size */
5912                 p = xdr_inline_decode(xdr, 8);
5913                 if (unlikely(!p))
5914                         goto out_overflow;
5915         }
5916         return 0;
5917 out_overflow:
5918         print_overflow_msg(__func__, xdr);
5919         return -EIO;
5920 }
5921
5922 static int decode_test_stateid(struct xdr_stream *xdr,
5923                                struct nfs41_test_stateid_res *res)
5924 {
5925         __be32 *p;
5926         int status;
5927         int num_res;
5928
5929         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5930         if (status)
5931                 return status;
5932
5933         p = xdr_inline_decode(xdr, 4);
5934         if (unlikely(!p))
5935                 goto out_overflow;
5936         num_res = be32_to_cpup(p++);
5937         if (num_res != 1)
5938                 goto out;
5939
5940         p = xdr_inline_decode(xdr, 4);
5941         if (unlikely(!p))
5942                 goto out_overflow;
5943         res->status = be32_to_cpup(p++);
5944
5945         return status;
5946 out_overflow:
5947         print_overflow_msg(__func__, xdr);
5948 out:
5949         return -EIO;
5950 }
5951
5952 static int decode_free_stateid(struct xdr_stream *xdr,
5953                                struct nfs41_free_stateid_res *res)
5954 {
5955         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5956         return res->status;
5957 }
5958 #endif /* CONFIG_NFS_V4_1 */
5959
5960 /*
5961  * END OF "GENERIC" DECODE ROUTINES.
5962  */
5963
5964 /*
5965  * Decode OPEN_DOWNGRADE response
5966  */
5967 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5968                                        struct xdr_stream *xdr,
5969                                        struct nfs_closeres *res)
5970 {
5971         struct compound_hdr hdr;
5972         int status;
5973
5974         status = decode_compound_hdr(xdr, &hdr);
5975         if (status)
5976                 goto out;
5977         status = decode_sequence(xdr, &res->seq_res, rqstp);
5978         if (status)
5979                 goto out;
5980         status = decode_putfh(xdr);
5981         if (status)
5982                 goto out;
5983         status = decode_open_downgrade(xdr, res);
5984         if (status != 0)
5985                 goto out;
5986         decode_getfattr(xdr, res->fattr, res->server);
5987 out:
5988         return status;
5989 }
5990
5991 /*
5992  * Decode ACCESS response
5993  */
5994 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5995                                struct nfs4_accessres *res)
5996 {
5997         struct compound_hdr hdr;
5998         int status;
5999
6000         status = decode_compound_hdr(xdr, &hdr);
6001         if (status)
6002                 goto out;
6003         status = decode_sequence(xdr, &res->seq_res, rqstp);
6004         if (status)
6005                 goto out;
6006         status = decode_putfh(xdr);
6007         if (status != 0)
6008                 goto out;
6009         status = decode_access(xdr, &res->supported, &res->access);
6010         if (status != 0)
6011                 goto out;
6012         decode_getfattr(xdr, res->fattr, res->server);
6013 out:
6014         return status;
6015 }
6016
6017 /*
6018  * Decode LOOKUP response
6019  */
6020 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6021                                struct nfs4_lookup_res *res)
6022 {
6023         struct compound_hdr hdr;
6024         int status;
6025
6026         status = decode_compound_hdr(xdr, &hdr);
6027         if (status)
6028                 goto out;
6029         status = decode_sequence(xdr, &res->seq_res, rqstp);
6030         if (status)
6031                 goto out;
6032         status = decode_putfh(xdr);
6033         if (status)
6034                 goto out;
6035         status = decode_lookup(xdr);
6036         if (status)
6037                 goto out;
6038         status = decode_getfh(xdr, res->fh);
6039         if (status)
6040                 goto out;
6041         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6042 out:
6043         return status;
6044 }
6045
6046 /*
6047  * Decode LOOKUP_ROOT response
6048  */
6049 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6050                                     struct xdr_stream *xdr,
6051                                     struct nfs4_lookup_res *res)
6052 {
6053         struct compound_hdr hdr;
6054         int status;
6055
6056         status = decode_compound_hdr(xdr, &hdr);
6057         if (status)
6058                 goto out;
6059         status = decode_sequence(xdr, &res->seq_res, rqstp);
6060         if (status)
6061                 goto out;
6062         status = decode_putrootfh(xdr);
6063         if (status)
6064                 goto out;
6065         status = decode_getfh(xdr, res->fh);
6066         if (status == 0)
6067                 status = decode_getfattr_label(xdr, res->fattr,
6068                                                 res->label, res->server);
6069 out:
6070         return status;
6071 }
6072
6073 /*
6074  * Decode REMOVE response
6075  */
6076 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6077                                struct nfs_removeres *res)
6078 {
6079         struct compound_hdr hdr;
6080         int status;
6081
6082         status = decode_compound_hdr(xdr, &hdr);
6083         if (status)
6084                 goto out;
6085         status = decode_sequence(xdr, &res->seq_res, rqstp);
6086         if (status)
6087                 goto out;
6088         status = decode_putfh(xdr);
6089         if (status)
6090                 goto out;
6091         status = decode_remove(xdr, &res->cinfo);
6092 out:
6093         return status;
6094 }
6095
6096 /*
6097  * Decode RENAME response
6098  */
6099 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6100                                struct nfs_renameres *res)
6101 {
6102         struct compound_hdr hdr;
6103         int status;
6104
6105         status = decode_compound_hdr(xdr, &hdr);
6106         if (status)
6107                 goto out;
6108         status = decode_sequence(xdr, &res->seq_res, rqstp);
6109         if (status)
6110                 goto out;
6111         status = decode_putfh(xdr);
6112         if (status)
6113                 goto out;
6114         status = decode_savefh(xdr);
6115         if (status)
6116                 goto out;
6117         status = decode_putfh(xdr);
6118         if (status)
6119                 goto out;
6120         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6121 out:
6122         return status;
6123 }
6124
6125 /*
6126  * Decode LINK response
6127  */
6128 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6129                              struct nfs4_link_res *res)
6130 {
6131         struct compound_hdr hdr;
6132         int status;
6133
6134         status = decode_compound_hdr(xdr, &hdr);
6135         if (status)
6136                 goto out;
6137         status = decode_sequence(xdr, &res->seq_res, rqstp);
6138         if (status)
6139                 goto out;
6140         status = decode_putfh(xdr);
6141         if (status)
6142                 goto out;
6143         status = decode_savefh(xdr);
6144         if (status)
6145                 goto out;
6146         status = decode_putfh(xdr);
6147         if (status)
6148                 goto out;
6149         status = decode_link(xdr, &res->cinfo);
6150         if (status)
6151                 goto out;
6152         /*
6153          * Note order: OP_LINK leaves the directory as the current
6154          *             filehandle.
6155          */
6156         status = decode_restorefh(xdr);
6157         if (status)
6158                 goto out;
6159         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6160 out:
6161         return status;
6162 }
6163
6164 /*
6165  * Decode CREATE response
6166  */
6167 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6168                                struct nfs4_create_res *res)
6169 {
6170         struct compound_hdr hdr;
6171         int status;
6172
6173         status = decode_compound_hdr(xdr, &hdr);
6174         if (status)
6175                 goto out;
6176         status = decode_sequence(xdr, &res->seq_res, rqstp);
6177         if (status)
6178                 goto out;
6179         status = decode_putfh(xdr);
6180         if (status)
6181                 goto out;
6182         status = decode_create(xdr, &res->dir_cinfo);
6183         if (status)
6184                 goto out;
6185         status = decode_getfh(xdr, res->fh);
6186         if (status)
6187                 goto out;
6188         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6189 out:
6190         return status;
6191 }
6192
6193 /*
6194  * Decode SYMLINK response
6195  */
6196 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6197                                 struct nfs4_create_res *res)
6198 {
6199         return nfs4_xdr_dec_create(rqstp, xdr, res);
6200 }
6201
6202 /*
6203  * Decode GETATTR response
6204  */
6205 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6206                                 struct nfs4_getattr_res *res)
6207 {
6208         struct compound_hdr hdr;
6209         int status;
6210
6211         status = decode_compound_hdr(xdr, &hdr);
6212         if (status)
6213                 goto out;
6214         status = decode_sequence(xdr, &res->seq_res, rqstp);
6215         if (status)
6216                 goto out;
6217         status = decode_putfh(xdr);
6218         if (status)
6219                 goto out;
6220         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6221 out:
6222         return status;
6223 }
6224
6225 /*
6226  * Encode an SETACL request
6227  */
6228 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6229                                 struct nfs_setaclargs *args)
6230 {
6231         struct compound_hdr hdr = {
6232                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6233         };
6234
6235         encode_compound_hdr(xdr, req, &hdr);
6236         encode_sequence(xdr, &args->seq_args, &hdr);
6237         encode_putfh(xdr, args->fh, &hdr);
6238         encode_setacl(xdr, args, &hdr);
6239         encode_nops(&hdr);
6240 }
6241
6242 /*
6243  * Decode SETACL response
6244  */
6245 static int
6246 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6247                     struct nfs_setaclres *res)
6248 {
6249         struct compound_hdr hdr;
6250         int status;
6251
6252         status = decode_compound_hdr(xdr, &hdr);
6253         if (status)
6254                 goto out;
6255         status = decode_sequence(xdr, &res->seq_res, rqstp);
6256         if (status)
6257                 goto out;
6258         status = decode_putfh(xdr);
6259         if (status)
6260                 goto out;
6261         status = decode_setattr(xdr);
6262 out:
6263         return status;
6264 }
6265
6266 /*
6267  * Decode GETACL response
6268  */
6269 static int
6270 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6271                     struct nfs_getaclres *res)
6272 {
6273         struct compound_hdr hdr;
6274         int status;
6275
6276         if (res->acl_scratch != NULL) {
6277                 void *p = page_address(res->acl_scratch);
6278                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6279         }
6280         status = decode_compound_hdr(xdr, &hdr);
6281         if (status)
6282                 goto out;
6283         status = decode_sequence(xdr, &res->seq_res, rqstp);
6284         if (status)
6285                 goto out;
6286         status = decode_putfh(xdr);
6287         if (status)
6288                 goto out;
6289         status = decode_getacl(xdr, rqstp, res);
6290
6291 out:
6292         return status;
6293 }
6294
6295 /*
6296  * Decode CLOSE response
6297  */
6298 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299                               struct nfs_closeres *res)
6300 {
6301         struct compound_hdr hdr;
6302         int status;
6303
6304         status = decode_compound_hdr(xdr, &hdr);
6305         if (status)
6306                 goto out;
6307         status = decode_sequence(xdr, &res->seq_res, rqstp);
6308         if (status)
6309                 goto out;
6310         status = decode_putfh(xdr);
6311         if (status)
6312                 goto out;
6313         status = decode_close(xdr, res);
6314         if (status != 0)
6315                 goto out;
6316         /*
6317          * Note: Server may do delete on close for this file
6318          *      in which case the getattr call will fail with
6319          *      an ESTALE error. Shouldn't be a problem,
6320          *      though, since fattr->valid will remain unset.
6321          */
6322         decode_getfattr(xdr, res->fattr, res->server);
6323 out:
6324         return status;
6325 }
6326
6327 /*
6328  * Decode OPEN response
6329  */
6330 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6331                              struct nfs_openres *res)
6332 {
6333         struct compound_hdr hdr;
6334         int status;
6335
6336         status = decode_compound_hdr(xdr, &hdr);
6337         if (status)
6338                 goto out;
6339         status = decode_sequence(xdr, &res->seq_res, rqstp);
6340         if (status)
6341                 goto out;
6342         status = decode_putfh(xdr);
6343         if (status)
6344                 goto out;
6345         status = decode_open(xdr, res);
6346         if (status)
6347                 goto out;
6348         status = decode_getfh(xdr, &res->fh);
6349         if (status)
6350                 goto out;
6351         if (res->access_request)
6352                 decode_access(xdr, &res->access_supported, &res->access_result);
6353         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6354 out:
6355         return status;
6356 }
6357
6358 /*
6359  * Decode OPEN_CONFIRM response
6360  */
6361 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6362                                      struct xdr_stream *xdr,
6363                                      struct nfs_open_confirmres *res)
6364 {
6365         struct compound_hdr hdr;
6366         int status;
6367
6368         status = decode_compound_hdr(xdr, &hdr);
6369         if (status)
6370                 goto out;
6371         status = decode_putfh(xdr);
6372         if (status)
6373                 goto out;
6374         status = decode_open_confirm(xdr, res);
6375 out:
6376         return status;
6377 }
6378
6379 /*
6380  * Decode OPEN response
6381  */
6382 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6383                                     struct xdr_stream *xdr,
6384                                     struct nfs_openres *res)
6385 {
6386         struct compound_hdr hdr;
6387         int status;
6388
6389         status = decode_compound_hdr(xdr, &hdr);
6390         if (status)
6391                 goto out;
6392         status = decode_sequence(xdr, &res->seq_res, rqstp);
6393         if (status)
6394                 goto out;
6395         status = decode_putfh(xdr);
6396         if (status)
6397                 goto out;
6398         status = decode_open(xdr, res);
6399         if (status)
6400                 goto out;
6401         if (res->access_request)
6402                 decode_access(xdr, &res->access_supported, &res->access_result);
6403         decode_getfattr(xdr, res->f_attr, res->server);
6404 out:
6405         return status;
6406 }
6407
6408 /*
6409  * Decode SETATTR response
6410  */
6411 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6412                                 struct xdr_stream *xdr,
6413                                 struct nfs_setattrres *res)
6414 {
6415         struct compound_hdr hdr;
6416         int status;
6417
6418         status = decode_compound_hdr(xdr, &hdr);
6419         if (status)
6420                 goto out;
6421         status = decode_sequence(xdr, &res->seq_res, rqstp);
6422         if (status)
6423                 goto out;
6424         status = decode_putfh(xdr);
6425         if (status)
6426                 goto out;
6427         status = decode_setattr(xdr);
6428         if (status)
6429                 goto out;
6430         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6431 out:
6432         return status;
6433 }
6434
6435 /*
6436  * Decode LOCK response
6437  */
6438 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439                              struct nfs_lock_res *res)
6440 {
6441         struct compound_hdr hdr;
6442         int status;
6443
6444         status = decode_compound_hdr(xdr, &hdr);
6445         if (status)
6446                 goto out;
6447         status = decode_sequence(xdr, &res->seq_res, rqstp);
6448         if (status)
6449                 goto out;
6450         status = decode_putfh(xdr);
6451         if (status)
6452                 goto out;
6453         status = decode_lock(xdr, res);
6454 out:
6455         return status;
6456 }
6457
6458 /*
6459  * Decode LOCKT response
6460  */
6461 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6462                               struct nfs_lockt_res *res)
6463 {
6464         struct compound_hdr hdr;
6465         int status;
6466
6467         status = decode_compound_hdr(xdr, &hdr);
6468         if (status)
6469                 goto out;
6470         status = decode_sequence(xdr, &res->seq_res, rqstp);
6471         if (status)
6472                 goto out;
6473         status = decode_putfh(xdr);
6474         if (status)
6475                 goto out;
6476         status = decode_lockt(xdr, res);
6477 out:
6478         return status;
6479 }
6480
6481 /*
6482  * Decode LOCKU response
6483  */
6484 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6485                               struct nfs_locku_res *res)
6486 {
6487         struct compound_hdr hdr;
6488         int status;
6489
6490         status = decode_compound_hdr(xdr, &hdr);
6491         if (status)
6492                 goto out;
6493         status = decode_sequence(xdr, &res->seq_res, rqstp);
6494         if (status)
6495                 goto out;
6496         status = decode_putfh(xdr);
6497         if (status)
6498                 goto out;
6499         status = decode_locku(xdr, res);
6500 out:
6501         return status;
6502 }
6503
6504 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6505                                           struct xdr_stream *xdr, void *dummy)
6506 {
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (!status)
6512                 status = decode_release_lockowner(xdr);
6513         return status;
6514 }
6515
6516 /*
6517  * Decode READLINK response
6518  */
6519 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6520                                  struct xdr_stream *xdr,
6521                                  struct nfs4_readlink_res *res)
6522 {
6523         struct compound_hdr hdr;
6524         int status;
6525
6526         status = decode_compound_hdr(xdr, &hdr);
6527         if (status)
6528                 goto out;
6529         status = decode_sequence(xdr, &res->seq_res, rqstp);
6530         if (status)
6531                 goto out;
6532         status = decode_putfh(xdr);
6533         if (status)
6534                 goto out;
6535         status = decode_readlink(xdr, rqstp);
6536 out:
6537         return status;
6538 }
6539
6540 /*
6541  * Decode READDIR response
6542  */
6543 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6544                                 struct nfs4_readdir_res *res)
6545 {
6546         struct compound_hdr hdr;
6547         int status;
6548
6549         status = decode_compound_hdr(xdr, &hdr);
6550         if (status)
6551                 goto out;
6552         status = decode_sequence(xdr, &res->seq_res, rqstp);
6553         if (status)
6554                 goto out;
6555         status = decode_putfh(xdr);
6556         if (status)
6557                 goto out;
6558         status = decode_readdir(xdr, rqstp, res);
6559 out:
6560         return status;
6561 }
6562
6563 /*
6564  * Decode Read response
6565  */
6566 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6567                              struct nfs_pgio_res *res)
6568 {
6569         struct compound_hdr hdr;
6570         int status;
6571
6572         status = decode_compound_hdr(xdr, &hdr);
6573         if (status)
6574                 goto out;
6575         status = decode_sequence(xdr, &res->seq_res, rqstp);
6576         if (status)
6577                 goto out;
6578         status = decode_putfh(xdr);
6579         if (status)
6580                 goto out;
6581         status = decode_read(xdr, rqstp, res);
6582         if (!status)
6583                 status = res->count;
6584 out:
6585         return status;
6586 }
6587
6588 /*
6589  * Decode WRITE response
6590  */
6591 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6592                               struct nfs_pgio_res *res)
6593 {
6594         struct compound_hdr hdr;
6595         int status;
6596
6597         status = decode_compound_hdr(xdr, &hdr);
6598         if (status)
6599                 goto out;
6600         status = decode_sequence(xdr, &res->seq_res, rqstp);
6601         if (status)
6602                 goto out;
6603         status = decode_putfh(xdr);
6604         if (status)
6605                 goto out;
6606         status = decode_write(xdr, res);
6607         if (status)
6608                 goto out;
6609         if (res->fattr)
6610                 decode_getfattr(xdr, res->fattr, res->server);
6611         if (!status)
6612                 status = res->count;
6613 out:
6614         return status;
6615 }
6616
6617 /*
6618  * Decode COMMIT response
6619  */
6620 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6621                                struct nfs_commitres *res)
6622 {
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         status = decode_commit(xdr, res);
6636 out:
6637         return status;
6638 }
6639
6640 /*
6641  * Decode FSINFO response
6642  */
6643 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6644                                struct nfs4_fsinfo_res *res)
6645 {
6646         struct compound_hdr hdr;
6647         int status;
6648
6649         status = decode_compound_hdr(xdr, &hdr);
6650         if (!status)
6651                 status = decode_sequence(xdr, &res->seq_res, req);
6652         if (!status)
6653                 status = decode_putfh(xdr);
6654         if (!status)
6655                 status = decode_fsinfo(xdr, res->fsinfo);
6656         return status;
6657 }
6658
6659 /*
6660  * Decode PATHCONF response
6661  */
6662 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6663                                  struct nfs4_pathconf_res *res)
6664 {
6665         struct compound_hdr hdr;
6666         int status;
6667
6668         status = decode_compound_hdr(xdr, &hdr);
6669         if (!status)
6670                 status = decode_sequence(xdr, &res->seq_res, req);
6671         if (!status)
6672                 status = decode_putfh(xdr);
6673         if (!status)
6674                 status = decode_pathconf(xdr, res->pathconf);
6675         return status;
6676 }
6677
6678 /*
6679  * Decode STATFS response
6680  */
6681 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6682                                struct nfs4_statfs_res *res)
6683 {
6684         struct compound_hdr hdr;
6685         int status;
6686
6687         status = decode_compound_hdr(xdr, &hdr);
6688         if (!status)
6689                 status = decode_sequence(xdr, &res->seq_res, req);
6690         if (!status)
6691                 status = decode_putfh(xdr);
6692         if (!status)
6693                 status = decode_statfs(xdr, res->fsstat);
6694         return status;
6695 }
6696
6697 /*
6698  * Decode GETATTR_BITMAP response
6699  */
6700 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6701                                     struct xdr_stream *xdr,
6702                                     struct nfs4_server_caps_res *res)
6703 {
6704         struct compound_hdr hdr;
6705         int status;
6706
6707         status = decode_compound_hdr(xdr, &hdr);
6708         if (status)
6709                 goto out;
6710         status = decode_sequence(xdr, &res->seq_res, req);
6711         if (status)
6712                 goto out;
6713         status = decode_putfh(xdr);
6714         if (status)
6715                 goto out;
6716         status = decode_server_caps(xdr, res);
6717 out:
6718         return status;
6719 }
6720
6721 /*
6722  * Decode RENEW response
6723  */
6724 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725                               void *__unused)
6726 {
6727         struct compound_hdr hdr;
6728         int status;
6729
6730         status = decode_compound_hdr(xdr, &hdr);
6731         if (!status)
6732                 status = decode_renew(xdr);
6733         return status;
6734 }
6735
6736 /*
6737  * Decode SETCLIENTID response
6738  */
6739 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6740                                     struct xdr_stream *xdr,
6741                                     struct nfs4_setclientid_res *res)
6742 {
6743         struct compound_hdr hdr;
6744         int status;
6745
6746         status = decode_compound_hdr(xdr, &hdr);
6747         if (!status)
6748                 status = decode_setclientid(xdr, res);
6749         return status;
6750 }
6751
6752 /*
6753  * Decode SETCLIENTID_CONFIRM response
6754  */
6755 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6756                                             struct xdr_stream *xdr)
6757 {
6758         struct compound_hdr hdr;
6759         int status;
6760
6761         status = decode_compound_hdr(xdr, &hdr);
6762         if (!status)
6763                 status = decode_setclientid_confirm(xdr);
6764         return status;
6765 }
6766
6767 /*
6768  * Decode DELEGRETURN response
6769  */
6770 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6771                                     struct xdr_stream *xdr,
6772                                     struct nfs4_delegreturnres *res)
6773 {
6774         struct compound_hdr hdr;
6775         int status;
6776
6777         status = decode_compound_hdr(xdr, &hdr);
6778         if (status)
6779                 goto out;
6780         status = decode_sequence(xdr, &res->seq_res, rqstp);
6781         if (status)
6782                 goto out;
6783         status = decode_putfh(xdr);
6784         if (status != 0)
6785                 goto out;
6786         status = decode_getfattr(xdr, res->fattr, res->server);
6787         if (status != 0)
6788                 goto out;
6789         status = decode_delegreturn(xdr);
6790 out:
6791         return status;
6792 }
6793
6794 /*
6795  * Decode FS_LOCATIONS response
6796  */
6797 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6798                                      struct xdr_stream *xdr,
6799                                      struct nfs4_fs_locations_res *res)
6800 {
6801         struct compound_hdr hdr;
6802         int status;
6803
6804         status = decode_compound_hdr(xdr, &hdr);
6805         if (status)
6806                 goto out;
6807         status = decode_sequence(xdr, &res->seq_res, req);
6808         if (status)
6809                 goto out;
6810         status = decode_putfh(xdr);
6811         if (status)
6812                 goto out;
6813         if (res->migration) {
6814                 xdr_enter_page(xdr, PAGE_SIZE);
6815                 status = decode_getfattr_generic(xdr,
6816                                         &res->fs_locations->fattr,
6817                                          NULL, res->fs_locations,
6818                                          NULL, res->fs_locations->server);
6819                 if (status)
6820                         goto out;
6821                 if (res->renew)
6822                         status = decode_renew(xdr);
6823         } else {
6824                 status = decode_lookup(xdr);
6825                 if (status)
6826                         goto out;
6827                 xdr_enter_page(xdr, PAGE_SIZE);
6828                 status = decode_getfattr_generic(xdr,
6829                                         &res->fs_locations->fattr,
6830                                          NULL, res->fs_locations,
6831                                          NULL, res->fs_locations->server);
6832         }
6833 out:
6834         return status;
6835 }
6836
6837 /*
6838  * Decode SECINFO response
6839  */
6840 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6841                                 struct xdr_stream *xdr,
6842                                 struct nfs4_secinfo_res *res)
6843 {
6844         struct compound_hdr hdr;
6845         int status;
6846
6847         status = decode_compound_hdr(xdr, &hdr);
6848         if (status)
6849                 goto out;
6850         status = decode_sequence(xdr, &res->seq_res, rqstp);
6851         if (status)
6852                 goto out;
6853         status = decode_putfh(xdr);
6854         if (status)
6855                 goto out;
6856         status = decode_secinfo(xdr, res);
6857 out:
6858         return status;
6859 }
6860
6861 /*
6862  * Decode FSID_PRESENT response
6863  */
6864 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6865                                      struct xdr_stream *xdr,
6866                                      struct nfs4_fsid_present_res *res)
6867 {
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (status)
6873                 goto out;
6874         status = decode_sequence(xdr, &res->seq_res, rqstp);
6875         if (status)
6876                 goto out;
6877         status = decode_putfh(xdr);
6878         if (status)
6879                 goto out;
6880         status = decode_getfh(xdr, res->fh);
6881         if (status)
6882                 goto out;
6883         if (res->renew)
6884                 status = decode_renew(xdr);
6885 out:
6886         return status;
6887 }
6888
6889 #if defined(CONFIG_NFS_V4_1)
6890 /*
6891  * Decode BIND_CONN_TO_SESSION response
6892  */
6893 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6894                                         struct xdr_stream *xdr,
6895                                         void *res)
6896 {
6897         struct compound_hdr hdr;
6898         int status;
6899
6900         status = decode_compound_hdr(xdr, &hdr);
6901         if (!status)
6902                 status = decode_bind_conn_to_session(xdr, res);
6903         return status;
6904 }
6905
6906 /*
6907  * Decode EXCHANGE_ID response
6908  */
6909 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6910                                     struct xdr_stream *xdr,
6911                                     void *res)
6912 {
6913         struct compound_hdr hdr;
6914         int status;
6915
6916         status = decode_compound_hdr(xdr, &hdr);
6917         if (!status)
6918                 status = decode_exchange_id(xdr, res);
6919         return status;
6920 }
6921
6922 /*
6923  * Decode CREATE_SESSION response
6924  */
6925 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6926                                        struct xdr_stream *xdr,
6927                                        struct nfs41_create_session_res *res)
6928 {
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         if (!status)
6934                 status = decode_create_session(xdr, res);
6935         return status;
6936 }
6937
6938 /*
6939  * Decode DESTROY_SESSION response
6940  */
6941 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6942                                         struct xdr_stream *xdr,
6943                                         void *res)
6944 {
6945         struct compound_hdr hdr;
6946         int status;
6947
6948         status = decode_compound_hdr(xdr, &hdr);
6949         if (!status)
6950                 status = decode_destroy_session(xdr, res);
6951         return status;
6952 }
6953
6954 /*
6955  * Decode DESTROY_CLIENTID response
6956  */
6957 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6958                                         struct xdr_stream *xdr,
6959                                         void *res)
6960 {
6961         struct compound_hdr hdr;
6962         int status;
6963
6964         status = decode_compound_hdr(xdr, &hdr);
6965         if (!status)
6966                 status = decode_destroy_clientid(xdr, res);
6967         return status;
6968 }
6969
6970 /*
6971  * Decode SEQUENCE response
6972  */
6973 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6974                                  struct xdr_stream *xdr,
6975                                  struct nfs4_sequence_res *res)
6976 {
6977         struct compound_hdr hdr;
6978         int status;
6979
6980         status = decode_compound_hdr(xdr, &hdr);
6981         if (!status)
6982                 status = decode_sequence(xdr, res, rqstp);
6983         return status;
6984 }
6985
6986 /*
6987  * Decode GET_LEASE_TIME response
6988  */
6989 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6990                                        struct xdr_stream *xdr,
6991                                        struct nfs4_get_lease_time_res *res)
6992 {
6993         struct compound_hdr hdr;
6994         int status;
6995
6996         status = decode_compound_hdr(xdr, &hdr);
6997         if (!status)
6998                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6999         if (!status)
7000                 status = decode_putrootfh(xdr);
7001         if (!status)
7002                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7003         return status;
7004 }
7005
7006 /*
7007  * Decode RECLAIM_COMPLETE response
7008  */
7009 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7010                                          struct xdr_stream *xdr,
7011                                          struct nfs41_reclaim_complete_res *res)
7012 {
7013         struct compound_hdr hdr;
7014         int status;
7015
7016         status = decode_compound_hdr(xdr, &hdr);
7017         if (!status)
7018                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7019         if (!status)
7020                 status = decode_reclaim_complete(xdr, NULL);
7021         return status;
7022 }
7023
7024 /*
7025  * Decode GETDEVINFO response
7026  */
7027 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7028                                       struct xdr_stream *xdr,
7029                                       struct nfs4_getdeviceinfo_res *res)
7030 {
7031         struct compound_hdr hdr;
7032         int status;
7033
7034         status = decode_compound_hdr(xdr, &hdr);
7035         if (status != 0)
7036                 goto out;
7037         status = decode_sequence(xdr, &res->seq_res, rqstp);
7038         if (status != 0)
7039                 goto out;
7040         status = decode_getdeviceinfo(xdr, res->pdev);
7041 out:
7042         return status;
7043 }
7044
7045 /*
7046  * Decode LAYOUTGET response
7047  */
7048 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7049                                   struct xdr_stream *xdr,
7050                                   struct nfs4_layoutget_res *res)
7051 {
7052         struct compound_hdr hdr;
7053         int status;
7054
7055         status = decode_compound_hdr(xdr, &hdr);
7056         if (status)
7057                 goto out;
7058         status = decode_sequence(xdr, &res->seq_res, rqstp);
7059         if (status)
7060                 goto out;
7061         status = decode_putfh(xdr);
7062         if (status)
7063                 goto out;
7064         status = decode_layoutget(xdr, rqstp, res);
7065 out:
7066         return status;
7067 }
7068
7069 /*
7070  * Decode LAYOUTRETURN response
7071  */
7072 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7073                                      struct xdr_stream *xdr,
7074                                      struct nfs4_layoutreturn_res *res)
7075 {
7076         struct compound_hdr hdr;
7077         int status;
7078
7079         status = decode_compound_hdr(xdr, &hdr);
7080         if (status)
7081                 goto out;
7082         status = decode_sequence(xdr, &res->seq_res, rqstp);
7083         if (status)
7084                 goto out;
7085         status = decode_putfh(xdr);
7086         if (status)
7087                 goto out;
7088         status = decode_layoutreturn(xdr, res);
7089 out:
7090         return status;
7091 }
7092
7093 /*
7094  * Decode LAYOUTCOMMIT response
7095  */
7096 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7097                                      struct xdr_stream *xdr,
7098                                      struct nfs4_layoutcommit_res *res)
7099 {
7100         struct compound_hdr hdr;
7101         int status;
7102
7103         status = decode_compound_hdr(xdr, &hdr);
7104         if (status)
7105                 goto out;
7106         status = decode_sequence(xdr, &res->seq_res, rqstp);
7107         if (status)
7108                 goto out;
7109         status = decode_putfh(xdr);
7110         if (status)
7111                 goto out;
7112         status = decode_layoutcommit(xdr, rqstp, res);
7113         if (status)
7114                 goto out;
7115         decode_getfattr(xdr, res->fattr, res->server);
7116 out:
7117         return status;
7118 }
7119
7120 /*
7121  * Decode SECINFO_NO_NAME response
7122  */
7123 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7124                                         struct xdr_stream *xdr,
7125                                         struct nfs4_secinfo_res *res)
7126 {
7127         struct compound_hdr hdr;
7128         int status;
7129
7130         status = decode_compound_hdr(xdr, &hdr);
7131         if (status)
7132                 goto out;
7133         status = decode_sequence(xdr, &res->seq_res, rqstp);
7134         if (status)
7135                 goto out;
7136         status = decode_putrootfh(xdr);
7137         if (status)
7138                 goto out;
7139         status = decode_secinfo_no_name(xdr, res);
7140 out:
7141         return status;
7142 }
7143
7144 /*
7145  * Decode TEST_STATEID response
7146  */
7147 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7148                                      struct xdr_stream *xdr,
7149                                      struct nfs41_test_stateid_res *res)
7150 {
7151         struct compound_hdr hdr;
7152         int status;
7153
7154         status = decode_compound_hdr(xdr, &hdr);
7155         if (status)
7156                 goto out;
7157         status = decode_sequence(xdr, &res->seq_res, rqstp);
7158         if (status)
7159                 goto out;
7160         status = decode_test_stateid(xdr, res);
7161 out:
7162         return status;
7163 }
7164
7165 /*
7166  * Decode FREE_STATEID response
7167  */
7168 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7169                                      struct xdr_stream *xdr,
7170                                      struct nfs41_free_stateid_res *res)
7171 {
7172         struct compound_hdr hdr;
7173         int status;
7174
7175         status = decode_compound_hdr(xdr, &hdr);
7176         if (status)
7177                 goto out;
7178         status = decode_sequence(xdr, &res->seq_res, rqstp);
7179         if (status)
7180                 goto out;
7181         status = decode_free_stateid(xdr, res);
7182 out:
7183         return status;
7184 }
7185 #endif /* CONFIG_NFS_V4_1 */
7186
7187 /**
7188  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7189  *                      the local page cache.
7190  * @xdr: XDR stream where entry resides
7191  * @entry: buffer to fill in with entry data
7192  * @plus: boolean indicating whether this should be a readdirplus entry
7193  *
7194  * Returns zero if successful, otherwise a negative errno value is
7195  * returned.
7196  *
7197  * This function is not invoked during READDIR reply decoding, but
7198  * rather whenever an application invokes the getdents(2) system call
7199  * on a directory already in our cache.
7200  */
7201 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7202                        int plus)
7203 {
7204         unsigned int savep;
7205         uint32_t bitmap[3] = {0};
7206         uint32_t len;
7207         __be32 *p = xdr_inline_decode(xdr, 4);
7208         if (unlikely(!p))
7209                 goto out_overflow;
7210         if (*p == xdr_zero) {
7211                 p = xdr_inline_decode(xdr, 4);
7212                 if (unlikely(!p))
7213                         goto out_overflow;
7214                 if (*p == xdr_zero)
7215                         return -EAGAIN;
7216                 entry->eof = 1;
7217                 return -EBADCOOKIE;
7218         }
7219
7220         p = xdr_inline_decode(xdr, 12);
7221         if (unlikely(!p))
7222                 goto out_overflow;
7223         entry->prev_cookie = entry->cookie;
7224         p = xdr_decode_hyper(p, &entry->cookie);
7225         entry->len = be32_to_cpup(p);
7226
7227         p = xdr_inline_decode(xdr, entry->len);
7228         if (unlikely(!p))
7229                 goto out_overflow;
7230         entry->name = (const char *) p;
7231
7232         /*
7233          * In case the server doesn't return an inode number,
7234          * we fake one here.  (We don't use inode number 0,
7235          * since glibc seems to choke on it...)
7236          */
7237         entry->ino = 1;
7238         entry->fattr->valid = 0;
7239
7240         if (decode_attr_bitmap(xdr, bitmap) < 0)
7241                 goto out_overflow;
7242
7243         if (decode_attr_length(xdr, &len, &savep) < 0)
7244                 goto out_overflow;
7245
7246         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7247                         NULL, entry->label, entry->server) < 0)
7248                 goto out_overflow;
7249         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7250                 entry->ino = entry->fattr->mounted_on_fileid;
7251         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7252                 entry->ino = entry->fattr->fileid;
7253
7254         entry->d_type = DT_UNKNOWN;
7255         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7256                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7257
7258         return 0;
7259
7260 out_overflow:
7261         print_overflow_msg(__func__, xdr);
7262         return -EAGAIN;
7263 }
7264
7265 /*
7266  * We need to translate between nfs status return values and
7267  * the local errno values which may not be the same.
7268  */
7269 static struct {
7270         int stat;
7271         int errno;
7272 } nfs_errtbl[] = {
7273         { NFS4_OK,              0               },
7274         { NFS4ERR_PERM,         -EPERM          },
7275         { NFS4ERR_NOENT,        -ENOENT         },
7276         { NFS4ERR_IO,           -errno_NFSERR_IO},
7277         { NFS4ERR_NXIO,         -ENXIO          },
7278         { NFS4ERR_ACCESS,       -EACCES         },
7279         { NFS4ERR_EXIST,        -EEXIST         },
7280         { NFS4ERR_XDEV,         -EXDEV          },
7281         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7282         { NFS4ERR_ISDIR,        -EISDIR         },
7283         { NFS4ERR_INVAL,        -EINVAL         },
7284         { NFS4ERR_FBIG,         -EFBIG          },
7285         { NFS4ERR_NOSPC,        -ENOSPC         },
7286         { NFS4ERR_ROFS,         -EROFS          },
7287         { NFS4ERR_MLINK,        -EMLINK         },
7288         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7289         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7290         { NFS4ERR_DQUOT,        -EDQUOT         },
7291         { NFS4ERR_STALE,        -ESTALE         },
7292         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7293         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7294         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7295         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7296         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7297         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7298         { NFS4ERR_LOCKED,       -EAGAIN         },
7299         { NFS4ERR_SYMLINK,      -ELOOP          },
7300         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7301         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7302         { -1,                   -EIO            }
7303 };
7304
7305 /*
7306  * Convert an NFS error code to a local one.
7307  * This one is used jointly by NFSv2 and NFSv3.
7308  */
7309 static int
7310 nfs4_stat_to_errno(int stat)
7311 {
7312         int i;
7313         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7314                 if (nfs_errtbl[i].stat == stat)
7315                         return nfs_errtbl[i].errno;
7316         }
7317         if (stat <= 10000 || stat > 10100) {
7318                 /* The server is looney tunes. */
7319                 return -EREMOTEIO;
7320         }
7321         /* If we cannot translate the error, the recovery routines should
7322          * handle it.
7323          * Note: remaining NFSv4 error codes have values > 10000, so should
7324          * not conflict with native Linux error codes.
7325          */
7326         return -stat;
7327 }
7328
7329 #ifdef CONFIG_NFS_V4_2
7330 #include "nfs42xdr.c"
7331 #endif /* CONFIG_NFS_V4_2 */
7332
7333 #define PROC(proc, argtype, restype)                            \
7334 [NFSPROC4_CLNT_##proc] = {                                      \
7335         .p_proc   = NFSPROC4_COMPOUND,                          \
7336         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7337         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7338         .p_arglen = NFS4_##argtype##_sz,                        \
7339         .p_replen = NFS4_##restype##_sz,                        \
7340         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7341         .p_name   = #proc,                                      \
7342 }
7343
7344 struct rpc_procinfo     nfs4_procedures[] = {
7345         PROC(READ,              enc_read,               dec_read),
7346         PROC(WRITE,             enc_write,              dec_write),
7347         PROC(COMMIT,            enc_commit,             dec_commit),
7348         PROC(OPEN,              enc_open,               dec_open),
7349         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7350         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7351         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7352         PROC(CLOSE,             enc_close,              dec_close),
7353         PROC(SETATTR,           enc_setattr,            dec_setattr),
7354         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7355         PROC(RENEW,             enc_renew,              dec_renew),
7356         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7357         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7358         PROC(LOCK,              enc_lock,               dec_lock),
7359         PROC(LOCKT,             enc_lockt,              dec_lockt),
7360         PROC(LOCKU,             enc_locku,              dec_locku),
7361         PROC(ACCESS,            enc_access,             dec_access),
7362         PROC(GETATTR,           enc_getattr,            dec_getattr),
7363         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7364         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7365         PROC(REMOVE,            enc_remove,             dec_remove),
7366         PROC(RENAME,            enc_rename,             dec_rename),
7367         PROC(LINK,              enc_link,               dec_link),
7368         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7369         PROC(CREATE,            enc_create,             dec_create),
7370         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7371         PROC(STATFS,            enc_statfs,             dec_statfs),
7372         PROC(READLINK,          enc_readlink,           dec_readlink),
7373         PROC(READDIR,           enc_readdir,            dec_readdir),
7374         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7375         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7376         PROC(GETACL,            enc_getacl,             dec_getacl),
7377         PROC(SETACL,            enc_setacl,             dec_setacl),
7378         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7379         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7380         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7381         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7382 #if defined(CONFIG_NFS_V4_1)
7383         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7384         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7385         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7386         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7387         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7388         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7389         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7390         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7391         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7392         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7393         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7394         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7395         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7396         PROC(BIND_CONN_TO_SESSION,
7397                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7398         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7399 #endif /* CONFIG_NFS_V4_1 */
7400 #ifdef CONFIG_NFS_V4_2
7401         PROC(SEEK,              enc_seek,               dec_seek),
7402         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7403         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7404 #endif /* CONFIG_NFS_V4_2 */
7405 };
7406
7407 const struct rpc_version nfs_version4 = {
7408         .number                 = 4,
7409         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7410         .procs                  = nfs4_procedures
7411 };
7412
7413 /*
7414  * Local variables:
7415  *  c-basic-offset: 8
7416  * End:
7417  */