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                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                 1) /* sc_cb_ident */
 147 #define decode_setclientid_maxsz \
 148                                 (op_decode_hdr_maxsz + \
 149                                 2 + \
 150                                 1024) /* large value for CLID_INUSE */
 151 #define encode_setclientid_confirm_maxsz \
 152                                 (op_encode_hdr_maxsz + \
 153                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 154 #define decode_setclientid_confirm_maxsz \
 155                                 (op_decode_hdr_maxsz)
 156 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 157 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 158 #define encode_share_access_maxsz \
 159                                 (2)
 160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 161 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 163 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 164                                 2 + encode_share_access_maxsz + 2 + \
 165                                 open_owner_id_maxsz + \
 166                                 encode_opentype_maxsz + \
 167                                 encode_claim_null_maxsz)
 168 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 170                                 decode_ace_maxsz)
 171 #define decode_change_info_maxsz        (5)
 172 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 173                                 decode_stateid_maxsz + \
 174                                 decode_change_info_maxsz + 1 + \
 175                                 nfs4_fattr_bitmap_maxsz + \
 176                                 decode_delegation_maxsz)
 177 #define encode_open_confirm_maxsz \
 178                                 (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 1)
 180 #define decode_open_confirm_maxsz \
 181                                 (op_decode_hdr_maxsz + \
 182                                  decode_stateid_maxsz)
 183 #define encode_open_downgrade_maxsz \
 184                                 (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 1 + \
 186                                  encode_share_access_maxsz)
 187 #define decode_open_downgrade_maxsz \
 188                                 (op_decode_hdr_maxsz + \
 189                                  decode_stateid_maxsz)
 190 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 191                                  1 + encode_stateid_maxsz)
 192 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + \
 196                                  encode_attrs_maxsz)
 197 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 198                                  nfs4_fattr_bitmap_maxsz)
 199 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 200                                  encode_stateid_maxsz + 3)
 201 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 202 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 203                                  2 + encode_verifier_maxsz + 5 + \
 204                                 nfs4_label_maxsz)
 205 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 206                                  decode_verifier_maxsz)
 207 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 208 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 209 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 210                                  encode_stateid_maxsz + 4)
 211 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 212                                  2 + decode_verifier_maxsz)
 213 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 214 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 215                                  decode_verifier_maxsz)
 216 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 217                                 nfs4_name_maxsz)
 218 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_change_info_maxsz)
 220 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 221                                 2 * nfs4_name_maxsz)
 222 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 226                                 nfs4_name_maxsz)
 227 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 228 #define encode_lockowner_maxsz  (7)
 229 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 230                                  7 + \
 231                                  1 + encode_stateid_maxsz + 1 + \
 232                                  encode_lockowner_maxsz)
 233 #define decode_lock_denied_maxsz \
 234                                 (8 + decode_lockowner_maxsz)
 235 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 236                                  decode_lock_denied_maxsz)
 237 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 238                                 encode_lockowner_maxsz)
 239 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 242                                  encode_stateid_maxsz + \
 243                                  4)
 244 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_stateid_maxsz)
 246 #define encode_release_lockowner_maxsz \
 247                                 (op_encode_hdr_maxsz + \
 248                                  encode_lockowner_maxsz)
 249 #define decode_release_lockowner_maxsz \
 250                                 (op_decode_hdr_maxsz)
 251 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 252 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 253 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 254                                 1 + nfs4_name_maxsz + \
 255                                 1 + \
 256                                 nfs4_fattr_maxsz)
 257 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 258 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 259                                 1 + 2 + nfs4_name_maxsz + \
 260                                 encode_attrs_maxsz)
 261 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 262                                 decode_change_info_maxsz + \
 263                                 nfs4_fattr_bitmap_maxsz)
 264 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 265 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 266 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 267 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 268 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 269 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 270                                  nfs4_fattr_bitmap_maxsz + 1)
 271 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 272                                  encode_stateid_maxsz + 3)
 273 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 274 #define encode_fs_locations_maxsz \
 275                                 (encode_getattr_maxsz)
 276 #define decode_fs_locations_maxsz \
 277                                 (0)
 278 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 279 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 280
 281 #if defined(CONFIG_NFS_V4_1)
 282 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 283 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 284                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 285
 286 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 287                                 encode_verifier_maxsz + \
 288                                 1 /* co_ownerid.len */ + \
 289                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 290                                 1 /* flags */ + \
 291                                 1 /* spa_how */ + \
 292                                 /* max is SP4_MACH_CRED (for now) */ + \
 293                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 294                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 295                                 1 /* implementation id array of size 1 */ + \
 296                                 1 /* nii_domain */ + \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 298                                 1 /* nii_name */ + \
 299                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 300                                 3 /* nii_date */)
 301 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 302                                 2 /* eir_clientid */ + \
 303                                 1 /* eir_sequenceid */ + \
 304                                 1 /* eir_flags */ + \
 305                                 1 /* spr_how */ + \
 306                                   /* max is SP4_MACH_CRED (for now) */ + \
 307                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 308                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 309                                 2 /* eir_server_owner.so_minor_id */ + \
 310                                 /* eir_server_owner.so_major_id<> */ \
 311                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 312                                 /* eir_server_scope<> */ \
 313                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                 1 /* eir_server_impl_id array length */ + \
 315                                 1 /* nii_domain */ + \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 317                                 1 /* nii_name */ + \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 3 /* nii_date */)
 320 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 321 #define decode_channel_attrs_maxsz  (6 + \
 322                                      1 /* ca_rdma_ird.len */ + \
 323                                      1 /* ca_rdma_ird */)
 324 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 325                                      2 /* csa_clientid */ + \
 326                                      1 /* csa_sequence */ + \
 327                                      1 /* csa_flags */ + \
 328                                      encode_channel_attrs_maxsz + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      1 /* csa_cb_program */ + \
 331                                      1 /* csa_sec_parms.len (1) */ + \
 332                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 333                                      1 /* stamp */ + \
 334                                      1 /* machinename.len */ + \
 335                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 336                                      1 /* uid */ + \
 337                                      1 /* gid */ + \
 338                                      1 /* gids.len (0) */)
 339 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 340                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 341                                      1 /* csr_sequence */ + \
 342                                      1 /* csr_flags */ + \
 343                                      decode_channel_attrs_maxsz + \
 344                                      decode_channel_attrs_maxsz)
 345 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 346                                      /* bctsa_sessid */ \
 347                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 348                                      1 /* bctsa_dir */ + \
 349                                      1 /* bctsa_use_conn_in_rdma_mode */)
 350 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 351                                      /* bctsr_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsr_dir */ + \
 354                                      1 /* bctsr_use_conn_in_rdma_mode */)
 355 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 356 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 357 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 358 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 359 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 360                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 361 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 362                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 363 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 364 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 365 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 366                                 encode_verifier_maxsz)
 367 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 368                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 369                                 decode_verifier_maxsz \
 370                                   /* verifier4 gdlr_verifier */ + \
 371                                 1 /* gdlr_deviceid_list count */ + \
 372                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 373                                             NFS4_DEVICEID4_SIZE) \
 374                                   /* gdlr_deviceid_list */ + \
 375                                 1 /* bool gdlr_eof */)
 376 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 377                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 378 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 379                                 1 /* layout type */ + \
 380                                 1 /* opaque devaddr4 length */ + \
 381                                   /* devaddr4 payload is read into page */ \
 382                                 1 /* notification bitmap length */ + \
 383                                 1 /* notification bitmap */)
 384 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 385                                 encode_stateid_maxsz)
 386 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 387                                 decode_stateid_maxsz + \
 388                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 389 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 390                                 2 /* offset */ + \
 391                                 2 /* length */ + \
 392                                 1 /* reclaim */ + \
 393                                 encode_stateid_maxsz + \
 394                                 1 /* new offset (true) */ + \
 395                                 2 /* last byte written */ + \
 396                                 1 /* nt_timechanged (false) */ + \
 397                                 1 /* layoutupdate4 layout type */ + \
 398                                 1 /* NULL filelayout layoutupdate4 payload */)
 399 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 400 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 401                                 encode_stateid_maxsz + \
 402                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 403 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 404                                 1 + decode_stateid_maxsz)
 405 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 406 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 407 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 408                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 409 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 410 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 412 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 413 #else /* CONFIG_NFS_V4_1 */
 414 #define encode_sequence_maxsz   0
 415 #define decode_sequence_maxsz   0
 416 #endif /* CONFIG_NFS_V4_1 */
 417
 418 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 419 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 420 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_read_maxsz)
 424 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 425                                 decode_sequence_maxsz + \
 426                                 decode_putfh_maxsz + \
 427                                 decode_read_maxsz)
 428 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 429                                 encode_sequence_maxsz + \
 430                                 encode_putfh_maxsz + \
 431                                 encode_readlink_maxsz)
 432 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 433                                 decode_sequence_maxsz + \
 434                                 decode_putfh_maxsz + \
 435                                 decode_readlink_maxsz)
 436 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 437                                 encode_sequence_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_readdir_maxsz)
 440 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 441                                 decode_sequence_maxsz + \
 442                                 decode_putfh_maxsz + \
 443                                 decode_readdir_maxsz)
 444 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 445                                 encode_sequence_maxsz + \
 446                                 encode_putfh_maxsz + \
 447                                 encode_write_maxsz + \
 448                                 encode_getattr_maxsz)
 449 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 450                                 decode_sequence_maxsz + \
 451                                 decode_putfh_maxsz + \
 452                                 decode_write_maxsz + \
 453                                 decode_getattr_maxsz)
 454 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 455                                 encode_sequence_maxsz + \
 456                                 encode_putfh_maxsz + \
 457                                 encode_commit_maxsz)
 458 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 459                                 decode_sequence_maxsz + \
 460                                 decode_putfh_maxsz + \
 461                                 decode_commit_maxsz)
 462 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 463                                 encode_sequence_maxsz + \
 464                                 encode_putfh_maxsz + \
 465                                 encode_open_maxsz + \
 466                                 encode_access_maxsz + \
 467                                 encode_getfh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 470                                 decode_sequence_maxsz + \
 471                                 decode_putfh_maxsz + \
 472                                 decode_open_maxsz + \
 473                                 decode_access_maxsz + \
 474                                 decode_getfh_maxsz + \
 475                                 decode_getattr_maxsz)
 476 #define NFS4_enc_open_confirm_sz \
 477                                 (compound_encode_hdr_maxsz + \
 478                                  encode_putfh_maxsz + \
 479                                  encode_open_confirm_maxsz)
 480 #define NFS4_dec_open_confirm_sz \
 481                                 (compound_decode_hdr_maxsz + \
 482                                  decode_putfh_maxsz + \
 483                                  decode_open_confirm_maxsz)
 484 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 485                                         encode_sequence_maxsz + \
 486                                         encode_putfh_maxsz + \
 487                                         encode_open_maxsz + \
 488                                         encode_access_maxsz + \
 489                                         encode_getattr_maxsz)
 490 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 491                                         decode_sequence_maxsz + \
 492                                         decode_putfh_maxsz + \
 493                                         decode_open_maxsz + \
 494                                         decode_access_maxsz + \
 495                                         decode_getattr_maxsz)
 496 #define NFS4_enc_open_downgrade_sz \
 497                                 (compound_encode_hdr_maxsz + \
 498                                  encode_sequence_maxsz + \
 499                                  encode_putfh_maxsz + \
 500                                  encode_open_downgrade_maxsz + \
 501                                  encode_getattr_maxsz)
 502 #define NFS4_dec_open_downgrade_sz \
 503                                 (compound_decode_hdr_maxsz + \
 504                                  decode_sequence_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_open_downgrade_maxsz + \
 507                                  decode_getattr_maxsz)
 508 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 509                                  encode_sequence_maxsz + \
 510                                  encode_putfh_maxsz + \
 511                                  encode_close_maxsz + \
 512                                  encode_getattr_maxsz)
 513 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 514                                  decode_sequence_maxsz + \
 515                                  decode_putfh_maxsz + \
 516                                  decode_close_maxsz + \
 517                                  decode_getattr_maxsz)
 518 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 519                                  encode_sequence_maxsz + \
 520                                  encode_putfh_maxsz + \
 521                                  encode_setattr_maxsz + \
 522                                  encode_getattr_maxsz)
 523 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 524                                  decode_sequence_maxsz + \
 525                                  decode_putfh_maxsz + \
 526                                  decode_setattr_maxsz + \
 527                                  decode_getattr_maxsz)
 528 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 529                                 encode_sequence_maxsz + \
 530                                 encode_putfh_maxsz + \
 531                                 encode_fsinfo_maxsz)
 532 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 533                                 decode_sequence_maxsz + \
 534                                 decode_putfh_maxsz + \
 535                                 decode_fsinfo_maxsz)
 536 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 537                                 encode_renew_maxsz)
 538 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 539                                 decode_renew_maxsz)
 540 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 541                                 encode_setclientid_maxsz)
 542 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 543                                 decode_setclientid_maxsz)
 544 #define NFS4_enc_setclientid_confirm_sz \
 545                                 (compound_encode_hdr_maxsz + \
 546                                 encode_setclientid_confirm_maxsz)
 547 #define NFS4_dec_setclientid_confirm_sz \
 548                                 (compound_decode_hdr_maxsz + \
 549                                 decode_setclientid_confirm_maxsz)
 550 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 551                                 encode_sequence_maxsz + \
 552                                 encode_putfh_maxsz + \
 553                                 encode_lock_maxsz)
 554 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 555                                 decode_sequence_maxsz + \
 556                                 decode_putfh_maxsz + \
 557                                 decode_lock_maxsz)
 558 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_lockt_maxsz)
 562 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 563                                  decode_sequence_maxsz + \
 564                                  decode_putfh_maxsz + \
 565                                  decode_lockt_maxsz)
 566 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 567                                 encode_sequence_maxsz + \
 568                                 encode_putfh_maxsz + \
 569                                 encode_locku_maxsz)
 570 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 571                                 decode_sequence_maxsz + \
 572                                 decode_putfh_maxsz + \
 573                                 decode_locku_maxsz)
 574 #define NFS4_enc_release_lockowner_sz \
 575                                 (compound_encode_hdr_maxsz + \
 576                                  encode_lockowner_maxsz)
 577 #define NFS4_dec_release_lockowner_sz \
 578                                 (compound_decode_hdr_maxsz + \
 579                                  decode_lockowner_maxsz)
 580 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 581                                 encode_sequence_maxsz + \
 582                                 encode_putfh_maxsz + \
 583                                 encode_access_maxsz + \
 584                                 encode_getattr_maxsz)
 585 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 586                                 decode_sequence_maxsz + \
 587                                 decode_putfh_maxsz + \
 588                                 decode_access_maxsz + \
 589                                 decode_getattr_maxsz)
 590 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 591                                 encode_sequence_maxsz + \
 592                                 encode_putfh_maxsz + \
 593                                 encode_getattr_maxsz + \
 594                                 encode_renew_maxsz)
 595 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_getattr_maxsz + \
 599                                 decode_renew_maxsz)
 600 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 601                                 encode_sequence_maxsz + \
 602                                 encode_putfh_maxsz + \
 603                                 encode_lookup_maxsz + \
 604                                 encode_getattr_maxsz + \
 605                                 encode_getfh_maxsz)
 606 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 607                                 decode_sequence_maxsz + \
 608                                 decode_putfh_maxsz + \
 609                                 decode_lookup_maxsz + \
 610                                 decode_getattr_maxsz + \
 611                                 decode_getfh_maxsz)
 612 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putrootfh_maxsz + \
 615                                 encode_getattr_maxsz + \
 616                                 encode_getfh_maxsz)
 617 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_putrootfh_maxsz + \
 620                                 decode_getattr_maxsz + \
 621                                 decode_getfh_maxsz)
 622 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 623                                 encode_sequence_maxsz + \
 624                                 encode_putfh_maxsz + \
 625                                 encode_remove_maxsz)
 626 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 627                                 decode_sequence_maxsz + \
 628                                 decode_putfh_maxsz + \
 629                                 decode_remove_maxsz)
 630 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 631                                 encode_sequence_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_savefh_maxsz + \
 634                                 encode_putfh_maxsz + \
 635                                 encode_rename_maxsz)
 636 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_savefh_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_rename_maxsz)
 642 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_savefh_maxsz + \
 646                                 encode_putfh_maxsz + \
 647                                 encode_link_maxsz + \
 648                                 encode_restorefh_maxsz + \
 649                                 encode_getattr_maxsz)
 650 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 651                                 decode_sequence_maxsz + \
 652                                 decode_putfh_maxsz + \
 653                                 decode_savefh_maxsz + \
 654                                 decode_putfh_maxsz + \
 655                                 decode_link_maxsz + \
 656                                 decode_restorefh_maxsz + \
 657                                 decode_getattr_maxsz)
 658 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 659                                 encode_sequence_maxsz + \
 660                                 encode_putfh_maxsz + \
 661                                 encode_symlink_maxsz + \
 662                                 encode_getattr_maxsz + \
 663                                 encode_getfh_maxsz)
 664 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_symlink_maxsz + \
 668                                 decode_getattr_maxsz + \
 669                                 decode_getfh_maxsz)
 670 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 671                                 encode_sequence_maxsz + \
 672                                 encode_putfh_maxsz + \
 673                                 encode_create_maxsz + \
 674                                 encode_getfh_maxsz + \
 675                                 encode_getattr_maxsz)
 676 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 677                                 decode_sequence_maxsz + \
 678                                 decode_putfh_maxsz + \
 679                                 decode_create_maxsz + \
 680                                 decode_getfh_maxsz + \
 681                                 decode_getattr_maxsz)
 682 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 683                                 encode_sequence_maxsz + \
 684                                 encode_putfh_maxsz + \
 685                                 encode_getattr_maxsz)
 686 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 687                                 decode_sequence_maxsz + \
 688                                 decode_putfh_maxsz + \
 689                                 decode_getattr_maxsz)
 690 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 691                                 encode_sequence_maxsz + \
 692                                 encode_putfh_maxsz + \
 693                                 encode_statfs_maxsz)
 694 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 695                                 decode_sequence_maxsz + \
 696                                 decode_putfh_maxsz + \
 697                                 decode_statfs_maxsz)
 698 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 699                                 encode_sequence_maxsz + \
 700                                 encode_putfh_maxsz + \
 701                                 encode_getattr_maxsz)
 702 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 703                                 decode_sequence_maxsz + \
 704                                 decode_putfh_maxsz + \
 705                                 decode_getattr_maxsz)
 706 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 707                                 encode_sequence_maxsz + \
 708                                 encode_putfh_maxsz + \
 709                                 encode_delegreturn_maxsz + \
 710                                 encode_getattr_maxsz)
 711 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 712                                 decode_sequence_maxsz + \
 713                                 decode_delegreturn_maxsz + \
 714                                 decode_getattr_maxsz)
 715 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 716                                 encode_sequence_maxsz + \
 717                                 encode_putfh_maxsz + \
 718                                 encode_getacl_maxsz)
 719 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 720                                 decode_sequence_maxsz + \
 721                                 decode_putfh_maxsz + \
 722                                 decode_getacl_maxsz)
 723 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_setacl_maxsz)
 727 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_setacl_maxsz)
 731 #define NFS4_enc_fs_locations_sz \
 732                                 (compound_encode_hdr_maxsz + \
 733                                  encode_sequence_maxsz + \
 734                                  encode_putfh_maxsz + \
 735                                  encode_lookup_maxsz + \
 736                                  encode_fs_locations_maxsz + \
 737                                  encode_renew_maxsz)
 738 #define NFS4_dec_fs_locations_sz \
 739                                 (compound_decode_hdr_maxsz + \
 740                                  decode_sequence_maxsz + \
 741                                  decode_putfh_maxsz + \
 742                                  decode_lookup_maxsz + \
 743                                  decode_fs_locations_maxsz + \
 744                                  decode_renew_maxsz)
 745 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 746                                 encode_sequence_maxsz + \
 747                                 encode_putfh_maxsz + \
 748                                 encode_secinfo_maxsz)
 749 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 750                                 decode_sequence_maxsz + \
 751                                 decode_putfh_maxsz + \
 752                                 decode_secinfo_maxsz)
 753 #define NFS4_enc_fsid_present_sz \
 754                                 (compound_encode_hdr_maxsz + \
 755                                  encode_sequence_maxsz + \
 756                                  encode_putfh_maxsz + \
 757                                  encode_getfh_maxsz + \
 758                                  encode_renew_maxsz)
 759 #define NFS4_dec_fsid_present_sz \
 760                                 (compound_decode_hdr_maxsz + \
 761                                  decode_sequence_maxsz + \
 762                                  decode_putfh_maxsz + \
 763                                  decode_getfh_maxsz + \
 764                                  decode_renew_maxsz)
 765 #if defined(CONFIG_NFS_V4_1)
 766 #define NFS4_enc_bind_conn_to_session_sz \
 767                                 (compound_encode_hdr_maxsz + \
 768                                  encode_bind_conn_to_session_maxsz)
 769 #define NFS4_dec_bind_conn_to_session_sz \
 770                                 (compound_decode_hdr_maxsz + \
 771                                  decode_bind_conn_to_session_maxsz)
 772 #define NFS4_enc_exchange_id_sz \
 773                                 (compound_encode_hdr_maxsz + \
 774                                  encode_exchange_id_maxsz)
 775 #define NFS4_dec_exchange_id_sz \
 776                                 (compound_decode_hdr_maxsz + \
 777                                  decode_exchange_id_maxsz)
 778 #define NFS4_enc_create_session_sz \
 779                                 (compound_encode_hdr_maxsz + \
 780                                  encode_create_session_maxsz)
 781 #define NFS4_dec_create_session_sz \
 782                                 (compound_decode_hdr_maxsz + \
 783                                  decode_create_session_maxsz)
 784 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 785                                          encode_destroy_session_maxsz)
 786 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 787                                          decode_destroy_session_maxsz)
 788 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 789                                          encode_destroy_clientid_maxsz)
 790 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 791                                          decode_destroy_clientid_maxsz)
 792 #define NFS4_enc_sequence_sz \
 793                                 (compound_decode_hdr_maxsz + \
 794                                  encode_sequence_maxsz)
 795 #define NFS4_dec_sequence_sz \
 796                                 (compound_decode_hdr_maxsz + \
 797                                  decode_sequence_maxsz)
 798 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 799                                          encode_sequence_maxsz + \
 800                                          encode_putrootfh_maxsz + \
 801                                          encode_fsinfo_maxsz)
 802 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 803                                          decode_sequence_maxsz + \
 804                                          decode_putrootfh_maxsz + \
 805                                          decode_fsinfo_maxsz)
 806 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 807                                          encode_sequence_maxsz + \
 808                                          encode_reclaim_complete_maxsz)
 809 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 810                                          decode_sequence_maxsz + \
 811                                          decode_reclaim_complete_maxsz)
 812 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 813                                 encode_sequence_maxsz + \
 814                                 encode_putfh_maxsz + \
 815                                 encode_getdevicelist_maxsz)
 816 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 817                                 decode_sequence_maxsz + \
 818                                 decode_putfh_maxsz + \
 819                                 decode_getdevicelist_maxsz)
 820 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 821                                 encode_sequence_maxsz +\
 822                                 encode_getdeviceinfo_maxsz)
 823 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 824                                 decode_sequence_maxsz + \
 825                                 decode_getdeviceinfo_maxsz)
 826 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 827                                 encode_sequence_maxsz + \
 828                                 encode_putfh_maxsz +        \
 829                                 encode_layoutget_maxsz)
 830 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 831                                 decode_sequence_maxsz + \
 832                                 decode_putfh_maxsz +        \
 833                                 decode_layoutget_maxsz)
 834 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 835                                 encode_sequence_maxsz +\
 836                                 encode_putfh_maxsz + \
 837                                 encode_layoutcommit_maxsz + \
 838                                 encode_getattr_maxsz)
 839 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 840                                 decode_sequence_maxsz + \
 841                                 decode_putfh_maxsz + \
 842                                 decode_layoutcommit_maxsz + \
 843                                 decode_getattr_maxsz)
 844 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 845                                 encode_sequence_maxsz + \
 846                                 encode_putfh_maxsz + \
 847                                 encode_layoutreturn_maxsz)
 848 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 849                                 decode_sequence_maxsz + \
 850                                 decode_putfh_maxsz + \
 851                                 decode_layoutreturn_maxsz)
 852 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 853                                         encode_sequence_maxsz + \
 854                                         encode_putrootfh_maxsz +\
 855                                         encode_secinfo_no_name_maxsz)
 856 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 857                                         decode_sequence_maxsz + \
 858                                         decode_putrootfh_maxsz + \
 859                                         decode_secinfo_no_name_maxsz)
 860 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 861                                          encode_sequence_maxsz + \
 862                                          encode_test_stateid_maxsz)
 863 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 864                                          decode_sequence_maxsz + \
 865                                          decode_test_stateid_maxsz)
 866 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 867                                          encode_sequence_maxsz + \
 868                                          encode_free_stateid_maxsz)
 869 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 870                                          decode_sequence_maxsz + \
 871                                          decode_free_stateid_maxsz)
 872
 873 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 874                                       compound_encode_hdr_maxsz +
 875                                       encode_sequence_maxsz +
 876                                       encode_putfh_maxsz +
 877                                       encode_getattr_maxsz) *
 878                                      XDR_UNIT);
 879
 880 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 881                                      compound_decode_hdr_maxsz +
 882                                      decode_sequence_maxsz +
 883                                      decode_putfh_maxsz) *
 884                                     XDR_UNIT);
 885
 886 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 887                                            compound_decode_hdr_maxsz +
 888                                            decode_sequence_maxsz) *
 889                                           XDR_UNIT);
 890 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 891 #endif /* CONFIG_NFS_V4_1 */
 892
 893 static const umode_t nfs_type2fmt[] = {
 894         [NF4BAD] = 0,
 895         [NF4REG] = S_IFREG,
 896         [NF4DIR] = S_IFDIR,
 897         [NF4BLK] = S_IFBLK,
 898         [NF4CHR] = S_IFCHR,
 899         [NF4LNK] = S_IFLNK,
 900         [NF4SOCK] = S_IFSOCK,
 901         [NF4FIFO] = S_IFIFO,
 902         [NF4ATTRDIR] = 0,
 903         [NF4NAMEDATTR] = 0,
 904 };
 905
 906 struct compound_hdr {
 907         int32_t         status;
 908         uint32_t        nops;
 909         __be32 *        nops_p;
 910         uint32_t        taglen;
 911         char *          tag;
 912         uint32_t        replen;         /* expected reply words */
 913         u32             minorversion;
 914 };
 915
 916 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 917 {
 918         __be32 *p = xdr_reserve_space(xdr, nbytes);
 919         BUG_ON(!p);
 920         return p;
 921 }
 922
 923 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 924 {
 925         __be32 *p;
 926
 927         p = xdr_reserve_space(xdr, len);
 928         xdr_encode_opaque_fixed(p, buf, len);
 929 }
 930
 931 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 932 {
 933         __be32 *p;
 934
 935         p = reserve_space(xdr, 4 + len);
 936         xdr_encode_opaque(p, str, len);
 937 }
 938
 939 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 940 {
 941         __be32 *p;
 942
 943         p = reserve_space(xdr, 4);
 944         *p = cpu_to_be32(n);
 945 }
 946
 947 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 948 {
 949         __be32 *p;
 950
 951         p = reserve_space(xdr, 8);
 952         xdr_encode_hyper(p, n);
 953 }
 954
 955 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 956                 const struct nfs_seqid *seqid)
 957 {
 958         encode_uint32(xdr, seqid->sequence->counter);
 959 }
 960
 961 static void encode_compound_hdr(struct xdr_stream *xdr,
 962                                 struct rpc_rqst *req,
 963                                 struct compound_hdr *hdr)
 964 {
 965         __be32 *p;
 966         struct rpc_auth *auth = req->rq_cred->cr_auth;
 967
 968         /* initialize running count of expected bytes in reply.
 969          * NOTE: the replied tag SHOULD be the same is the one sent,
 970          * but this is not required as a MUST for the server to do so. */
 971         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 972
 973         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 974         encode_string(xdr, hdr->taglen, hdr->tag);
 975         p = reserve_space(xdr, 8);
 976         *p++ = cpu_to_be32(hdr->minorversion);
 977         hdr->nops_p = p;
 978         *p = cpu_to_be32(hdr->nops);
 979 }
 980
 981 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 982                 uint32_t replen,
 983                 struct compound_hdr *hdr)
 984 {
 985         encode_uint32(xdr, op);
 986         hdr->nops++;
 987         hdr->replen += replen;
 988 }
 989
 990 static void encode_nops(struct compound_hdr *hdr)
 991 {
 992         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 993         *hdr->nops_p = htonl(hdr->nops);
 994 }
 995
 996 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 997 {
 998         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 999 }
1000
1001 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1002 {
1003         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1004 }
1005
1006 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1007                                 const struct nfs4_label *label,
1008                                 const struct nfs_server *server)
1009 {
1010         char owner_name[IDMAP_NAMESZ];
1011         char owner_group[IDMAP_NAMESZ];
1012         int owner_namelen = 0;
1013         int owner_grouplen = 0;
1014         __be32 *p;
1015         unsigned i;
1016         uint32_t len = 0;
1017         uint32_t bmval_len;
1018         uint32_t bmval[3] = { 0 };
1019
1020         /*
1021          * We reserve enough space to write the entire attribute buffer at once.
1022          * In the worst-case, this would be
1023          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1024          * = 40 bytes, plus any contribution from variable-length fields
1025          *            such as owner/group.
1026          */
1027         if (iap->ia_valid & ATTR_SIZE) {
1028                 bmval[0] |= FATTR4_WORD0_SIZE;
1029                 len += 8;
1030         }
1031         if (iap->ia_valid & ATTR_MODE) {
1032                 bmval[1] |= FATTR4_WORD1_MODE;
1033                 len += 4;
1034         }
1035         if (iap->ia_valid & ATTR_UID) {
1036                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1037                 if (owner_namelen < 0) {
1038                         dprintk("nfs: couldn't resolve uid %d to string\n",
1039                                         from_kuid(&init_user_ns, iap->ia_uid));
1040                         /* XXX */
1041                         strcpy(owner_name, "nobody");
1042                         owner_namelen = sizeof("nobody") - 1;
1043                         /* goto out; */
1044                 }
1045                 bmval[1] |= FATTR4_WORD1_OWNER;
1046                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1047         }
1048         if (iap->ia_valid & ATTR_GID) {
1049                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1050                 if (owner_grouplen < 0) {
1051                         dprintk("nfs: couldn't resolve gid %d to string\n",
1052                                         from_kgid(&init_user_ns, iap->ia_gid));
1053                         strcpy(owner_group, "nobody");
1054                         owner_grouplen = sizeof("nobody") - 1;
1055                         /* goto out; */
1056                 }
1057                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1058                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1059         }
1060         if (iap->ia_valid & ATTR_ATIME_SET) {
1061                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1062                 len += 16;
1063         } else if (iap->ia_valid & ATTR_ATIME) {
1064                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065                 len += 4;
1066         }
1067         if (iap->ia_valid & ATTR_MTIME_SET) {
1068                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1069                 len += 16;
1070         } else if (iap->ia_valid & ATTR_MTIME) {
1071                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1072                 len += 4;
1073         }
1074         if (label) {
1075                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1076                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1077         }
1078
1079         if (bmval[2] != 0)
1080                 bmval_len = 3;
1081         else if (bmval[1] != 0)
1082                 bmval_len = 2;
1083         else
1084                 bmval_len = 1;
1085
1086         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1087
1088         *p++ = cpu_to_be32(bmval_len);
1089         for (i = 0; i < bmval_len; i++)
1090                 *p++ = cpu_to_be32(bmval[i]);
1091         *p++ = cpu_to_be32(len);
1092
1093         if (bmval[0] & FATTR4_WORD0_SIZE)
1094                 p = xdr_encode_hyper(p, iap->ia_size);
1095         if (bmval[1] & FATTR4_WORD1_MODE)
1096                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1097         if (bmval[1] & FATTR4_WORD1_OWNER)
1098                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1099         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1100                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1101         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1102                 if (iap->ia_valid & ATTR_ATIME_SET) {
1103                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1104                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1105                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1106                 } else
1107                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1108         }
1109         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1110                 if (iap->ia_valid & ATTR_MTIME_SET) {
1111                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1112                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1113                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1114                 } else
1115                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1116         }
1117         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1118                 *p++ = cpu_to_be32(label->lfs);
1119                 *p++ = cpu_to_be32(label->pi);
1120                 *p++ = cpu_to_be32(label->len);
1121                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1122         }
1123
1124 /* out: */
1125 }
1126
1127 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1128 {
1129         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1130         encode_uint32(xdr, access);
1131 }
1132
1133 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1134 {
1135         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1136         encode_nfs4_seqid(xdr, arg->seqid);
1137         encode_nfs4_stateid(xdr, arg->stateid);
1138 }
1139
1140 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1141 {
1142         __be32 *p;
1143
1144         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1145         p = reserve_space(xdr, 12);
1146         p = xdr_encode_hyper(p, args->offset);
1147         *p = cpu_to_be32(args->count);
1148 }
1149
1150 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1151 {
1152         __be32 *p;
1153
1154         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1155         encode_uint32(xdr, create->ftype);
1156
1157         switch (create->ftype) {
1158         case NF4LNK:
1159                 p = reserve_space(xdr, 4);
1160                 *p = cpu_to_be32(create->u.symlink.len);
1161                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1162                 break;
1163
1164         case NF4BLK: case NF4CHR:
1165                 p = reserve_space(xdr, 8);
1166                 *p++ = cpu_to_be32(create->u.device.specdata1);
1167                 *p = cpu_to_be32(create->u.device.specdata2);
1168                 break;
1169
1170         default:
1171                 break;
1172         }
1173
1174         encode_string(xdr, create->name->len, create->name->name);
1175         encode_attrs(xdr, create->attrs, create->label, create->server);
1176 }
1177
1178 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1179 {
1180         __be32 *p;
1181
1182         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1183         p = reserve_space(xdr, 8);
1184         *p++ = cpu_to_be32(1);
1185         *p = cpu_to_be32(bitmap);
1186 }
1187
1188 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1189 {
1190         __be32 *p;
1191
1192         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1193         p = reserve_space(xdr, 12);
1194         *p++ = cpu_to_be32(2);
1195         *p++ = cpu_to_be32(bm0);
1196         *p = cpu_to_be32(bm1);
1197 }
1198
1199 static void
1200 encode_getattr_three(struct xdr_stream *xdr,
1201                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1202                      struct compound_hdr *hdr)
1203 {
1204         __be32 *p;
1205
1206         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1207         if (bm2) {
1208                 p = reserve_space(xdr, 16);
1209                 *p++ = cpu_to_be32(3);
1210                 *p++ = cpu_to_be32(bm0);
1211                 *p++ = cpu_to_be32(bm1);
1212                 *p = cpu_to_be32(bm2);
1213         } else if (bm1) {
1214                 p = reserve_space(xdr, 12);
1215                 *p++ = cpu_to_be32(2);
1216                 *p++ = cpu_to_be32(bm0);
1217                 *p = cpu_to_be32(bm1);
1218         } else {
1219                 p = reserve_space(xdr, 8);
1220                 *p++ = cpu_to_be32(1);
1221                 *p = cpu_to_be32(bm0);
1222         }
1223 }
1224
1225 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1226 {
1227         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1228                            bitmask[1] & nfs4_fattr_bitmap[1],
1229                            bitmask[2] & nfs4_fattr_bitmap[2],
1230                            hdr);
1231 }
1232
1233 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1234                                  const u32 *open_bitmap,
1235                                  struct compound_hdr *hdr)
1236 {
1237         encode_getattr_three(xdr,
1238                              bitmask[0] & open_bitmap[0],
1239                              bitmask[1] & open_bitmap[1],
1240                              bitmask[2] & open_bitmap[2],
1241                              hdr);
1242 }
1243
1244 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1245 {
1246         encode_getattr_three(xdr,
1247                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1248                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1249                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1250                              hdr);
1251 }
1252
1253 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1254 {
1255         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1256                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1257 }
1258
1259 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1260 {
1261         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1262 }
1263
1264 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1265 {
1266         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1267         encode_string(xdr, name->len, name->name);
1268 }
1269
1270 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1271 {
1272         if (fl->fl_type == F_RDLCK)
1273                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1274         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1275 }
1276
1277 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1278 {
1279         if (fl->fl_end == OFFSET_MAX)
1280                 return ~(uint64_t)0;
1281         return fl->fl_end - fl->fl_start + 1;
1282 }
1283
1284 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1285 {
1286         __be32 *p;
1287
1288         p = reserve_space(xdr, 32);
1289         p = xdr_encode_hyper(p, lowner->clientid);
1290         *p++ = cpu_to_be32(20);
1291         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1292         *p++ = cpu_to_be32(lowner->s_dev);
1293         xdr_encode_hyper(p, lowner->id);
1294 }
1295
1296 /*
1297  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1298  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1299  */
1300 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1301 {
1302         __be32 *p;
1303
1304         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1305         p = reserve_space(xdr, 28);
1306         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1307         *p++ = cpu_to_be32(args->reclaim);
1308         p = xdr_encode_hyper(p, args->fl->fl_start);
1309         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1310         *p = cpu_to_be32(args->new_lock_owner);
1311         if (args->new_lock_owner){
1312                 encode_nfs4_seqid(xdr, args->open_seqid);
1313                 encode_nfs4_stateid(xdr, args->open_stateid);
1314                 encode_nfs4_seqid(xdr, args->lock_seqid);
1315                 encode_lockowner(xdr, &args->lock_owner);
1316         }
1317         else {
1318                 encode_nfs4_stateid(xdr, args->lock_stateid);
1319                 encode_nfs4_seqid(xdr, args->lock_seqid);
1320         }
1321 }
1322
1323 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1324 {
1325         __be32 *p;
1326
1327         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1328         p = reserve_space(xdr, 20);
1329         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1330         p = xdr_encode_hyper(p, args->fl->fl_start);
1331         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1332         encode_lockowner(xdr, &args->lock_owner);
1333 }
1334
1335 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1336 {
1337         __be32 *p;
1338
1339         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1340         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1341         encode_nfs4_seqid(xdr, args->seqid);
1342         encode_nfs4_stateid(xdr, args->stateid);
1343         p = reserve_space(xdr, 16);
1344         p = xdr_encode_hyper(p, args->fl->fl_start);
1345         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1346 }
1347
1348 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1349 {
1350         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1351         encode_lockowner(xdr, lowner);
1352 }
1353
1354 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1355 {
1356         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1357         encode_string(xdr, name->len, name->name);
1358 }
1359
1360 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1361 {
1362         __be32 *p;
1363
1364         p = reserve_space(xdr, 8);
1365         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1366         case FMODE_READ:
1367                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1368                 break;
1369         case FMODE_WRITE:
1370                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1371                 break;
1372         case FMODE_READ|FMODE_WRITE:
1373                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1374                 break;
1375         default:
1376                 *p++ = cpu_to_be32(0);
1377         }
1378         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1379 }
1380
1381 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1382 {
1383         __be32 *p;
1384  /*
1385  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1386  * owner 4 = 32
1387  */
1388         encode_nfs4_seqid(xdr, arg->seqid);
1389         encode_share_access(xdr, arg->fmode);
1390         p = reserve_space(xdr, 36);
1391         p = xdr_encode_hyper(p, arg->clientid);
1392         *p++ = cpu_to_be32(24);
1393         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1394         *p++ = cpu_to_be32(arg->server->s_dev);
1395         *p++ = cpu_to_be32(arg->id.uniquifier);
1396         xdr_encode_hyper(p, arg->id.create_time);
1397 }
1398
1399 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         struct iattr dummy;
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 4);
1405         switch(arg->createmode) {
1406         case NFS4_CREATE_UNCHECKED:
1407                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1408                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1409                 break;
1410         case NFS4_CREATE_GUARDED:
1411                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1412                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1413                 break;
1414         case NFS4_CREATE_EXCLUSIVE:
1415                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1416                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1417                 break;
1418         case NFS4_CREATE_EXCLUSIVE4_1:
1419                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1420                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421                 dummy.ia_valid = 0;
1422                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1423         }
1424 }
1425
1426 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1427 {
1428         __be32 *p;
1429
1430         p = reserve_space(xdr, 4);
1431         switch (arg->open_flags & O_CREAT) {
1432         case 0:
1433                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1434                 break;
1435         default:
1436                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1437                 encode_createmode(xdr, arg);
1438         }
1439 }
1440
1441 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 4);
1446         switch (delegation_type) {
1447         case 0:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1449                 break;
1450         case FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1452                 break;
1453         case FMODE_WRITE|FMODE_READ:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1455                 break;
1456         default:
1457                 BUG();
1458         }
1459 }
1460
1461 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1462 {
1463         __be32 *p;
1464
1465         p = reserve_space(xdr, 4);
1466         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1467         encode_string(xdr, name->len, name->name);
1468 }
1469
1470 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1476         encode_delegation_type(xdr, type);
1477 }
1478
1479 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1485         encode_nfs4_stateid(xdr, stateid);
1486         encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_fh(struct xdr_stream *xdr)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1495 }
1496
1497 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1503         encode_nfs4_stateid(xdr, stateid);
1504 }
1505
1506 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1507 {
1508         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1509         encode_openhdr(xdr, arg);
1510         encode_opentype(xdr, arg);
1511         switch (arg->claim) {
1512         case NFS4_OPEN_CLAIM_NULL:
1513                 encode_claim_null(xdr, arg->name);
1514                 break;
1515         case NFS4_OPEN_CLAIM_PREVIOUS:
1516                 encode_claim_previous(xdr, arg->u.delegation_type);
1517                 break;
1518         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1519                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1520                 break;
1521         case NFS4_OPEN_CLAIM_FH:
1522                 encode_claim_fh(xdr);
1523                 break;
1524         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1525                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1526                 break;
1527         default:
1528                 BUG();
1529         }
1530 }
1531
1532 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1533 {
1534         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1535         encode_nfs4_stateid(xdr, arg->stateid);
1536         encode_nfs4_seqid(xdr, arg->seqid);
1537 }
1538
1539 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1540 {
1541         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1542         encode_nfs4_stateid(xdr, arg->stateid);
1543         encode_nfs4_seqid(xdr, arg->seqid);
1544         encode_share_access(xdr, arg->fmode);
1545 }
1546
1547 static void
1548 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1551         encode_string(xdr, fh->size, fh->data);
1552 }
1553
1554 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1555 {
1556         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1557 }
1558
1559 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1560                         struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565         encode_nfs4_stateid(xdr, &args->stateid);
1566
1567         p = reserve_space(xdr, 12);
1568         p = xdr_encode_hyper(p, args->offset);
1569         *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574         uint32_t attrs[3] = {
1575                 FATTR4_WORD0_RDATTR_ERROR,
1576                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577         };
1578         uint32_t dircount = readdir->count >> 1;
1579         __be32 *p, verf[2];
1580         uint32_t attrlen = 0;
1581         unsigned int i;
1582
1583         if (readdir->plus) {
1584                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591                 dircount >>= 1;
1592         }
1593         /* Use mounted_on_fileid only if the server supports it */
1594         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595                 attrs[0] |= FATTR4_WORD0_FILEID;
1596         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597                 attrs[i] &= readdir->bitmask[i];
1598                 if (attrs[i] != 0)
1599                         attrlen = i+1;
1600         }
1601
1602         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603         encode_uint64(xdr, readdir->cookie);
1604         encode_nfs4_verifier(xdr, &readdir->verifier);
1605         p = reserve_space(xdr, 12 + (attrlen << 2));
1606         *p++ = cpu_to_be32(dircount);
1607         *p++ = cpu_to_be32(readdir->count);
1608         *p++ = cpu_to_be32(attrlen);
1609         for (i = 0; i < attrlen; i++)
1610                 *p++ = cpu_to_be32(attrs[i]);
1611         memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614                         __func__,
1615                         (unsigned long long)readdir->cookie,
1616                         verf[0], verf[1],
1617                         attrs[0] & readdir->bitmask[0],
1618                         attrs[1] & readdir->bitmask[1],
1619                         attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630         encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636         encode_string(xdr, oldname->len, oldname->name);
1637         encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641                          struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644         encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656         __be32 *p;
1657
1658         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659         encode_nfs4_stateid(xdr, &zero_stateid);
1660         p = reserve_space(xdr, 2*4);
1661         *p++ = cpu_to_be32(1);
1662         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663         p = reserve_space(xdr, 4);
1664         *p = cpu_to_be32(arg->acl_len);
1665         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677         encode_nfs4_stateid(xdr, &arg->stateid);
1678         encode_attrs(xdr, arg->iap, arg->label, server);
1679 }
1680
1681 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1682 {
1683         __be32 *p;
1684
1685         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1686         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1687
1688         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1689         p = reserve_space(xdr, 4);
1690         *p = cpu_to_be32(setclientid->sc_prog);
1691         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1692         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1693         p = reserve_space(xdr, 4);
1694         *p = cpu_to_be32(setclientid->sc_cb_ident);
1695 }
1696
1697 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1698 {
1699         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1700                         decode_setclientid_confirm_maxsz, hdr);
1701         encode_uint64(xdr, arg->clientid);
1702         encode_nfs4_verifier(xdr, &arg->confirm);
1703 }
1704
1705 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1706                          struct compound_hdr *hdr)
1707 {
1708         __be32 *p;
1709
1710         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1711         encode_nfs4_stateid(xdr, &args->stateid);
1712
1713         p = reserve_space(xdr, 16);
1714         p = xdr_encode_hyper(p, args->offset);
1715         *p++ = cpu_to_be32(args->stable);
1716         *p = cpu_to_be32(args->count);
1717
1718         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1719 }
1720
1721 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1722 {
1723         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1724         encode_nfs4_stateid(xdr, stateid);
1725 }
1726
1727 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1728 {
1729         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1730         encode_string(xdr, name->len, name->name);
1731 }
1732
1733 #if defined(CONFIG_NFS_V4_1)
1734 /* NFSv4.1 operations */
1735 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1736                                    struct nfs4_session *session,
1737                                    struct compound_hdr *hdr)
1738 {
1739         __be32 *p;
1740
1741         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1742                 decode_bind_conn_to_session_maxsz, hdr);
1743         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1744         p = xdr_reserve_space(xdr, 8);
1745         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1746         *p = 0; /* use_conn_in_rdma_mode = False */
1747 }
1748
1749 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1750 {
1751         unsigned int i;
1752         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1753         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1754                 encode_uint32(xdr, op_map->u.words[i]);
1755 }
1756
1757 static void encode_exchange_id(struct xdr_stream *xdr,
1758                                struct nfs41_exchange_id_args *args,
1759                                struct compound_hdr *hdr)
1760 {
1761         __be32 *p;
1762         char impl_name[IMPL_NAME_LIMIT];
1763         int len = 0;
1764
1765         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1766         encode_nfs4_verifier(xdr, args->verifier);
1767
1768         encode_string(xdr, args->id_len, args->id);
1769
1770         encode_uint32(xdr, args->flags);
1771         encode_uint32(xdr, args->state_protect.how);
1772
1773         switch (args->state_protect.how) {
1774         case SP4_NONE:
1775                 break;
1776         case SP4_MACH_CRED:
1777                 encode_op_map(xdr, &args->state_protect.enforce);
1778                 encode_op_map(xdr, &args->state_protect.allow);
1779                 break;
1780         default:
1781                 WARN_ON_ONCE(1);
1782                 break;
1783         }
1784
1785         if (send_implementation_id &&
1786             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1787             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1788                 <= sizeof(impl_name) + 1)
1789                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1790                                utsname()->sysname, utsname()->release,
1791                                utsname()->version, utsname()->machine);
1792
1793         if (len > 0) {
1794                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1795
1796                 encode_string(xdr,
1797                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1798                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1799                 encode_string(xdr, len, impl_name);
1800                 /* just send zeros for nii_date - the date is in nii_name */
1801                 p = reserve_space(xdr, 12);
1802                 p = xdr_encode_hyper(p, 0);
1803                 *p = cpu_to_be32(0);
1804         } else
1805                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1806 }
1807
1808 static void encode_create_session(struct xdr_stream *xdr,
1809                                   struct nfs41_create_session_args *args,
1810                                   struct compound_hdr *hdr)
1811 {
1812         __be32 *p;
1813         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1814         uint32_t len;
1815         struct nfs_client *clp = args->client;
1816         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1817         u32 max_resp_sz_cached;
1818
1819         /*
1820          * Assumes OPEN is the biggest non-idempotent compound.
1821          * 2 is the verifier.
1822          */
1823         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1824                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1825
1826         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1827                         clp->cl_ipaddr);
1828
1829         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1830         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1831         p = xdr_encode_hyper(p, clp->cl_clientid);
1832         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1833         *p++ = cpu_to_be32(args->flags);                        /*flags */
1834
1835         /* Fore Channel */
1836         *p++ = cpu_to_be32(0);                          /* header padding size */
1837         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1838         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1839         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1841         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1842         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1843
1844         /* Back Channel */
1845         *p++ = cpu_to_be32(0);                          /* header padding size */
1846         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1847         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1848         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1851         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1852
1853         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1854         *p++ = cpu_to_be32(1);
1855         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1856
1857         /* authsys_parms rfc1831 */
1858         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1859         p = xdr_encode_opaque(p, machine_name, len);
1860         *p++ = cpu_to_be32(0);                          /* UID */
1861         *p++ = cpu_to_be32(0);                          /* GID */
1862         *p = cpu_to_be32(0);                            /* No more gids */
1863 }
1864
1865 static void encode_destroy_session(struct xdr_stream *xdr,
1866                                    struct nfs4_session *session,
1867                                    struct compound_hdr *hdr)
1868 {
1869         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1870         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1871 }
1872
1873 static void encode_destroy_clientid(struct xdr_stream *xdr,
1874                                    uint64_t clientid,
1875                                    struct compound_hdr *hdr)
1876 {
1877         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1878         encode_uint64(xdr, clientid);
1879 }
1880
1881 static void encode_reclaim_complete(struct xdr_stream *xdr,
1882                                     struct nfs41_reclaim_complete_args *args,
1883                                     struct compound_hdr *hdr)
1884 {
1885         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1886         encode_uint32(xdr, args->one_fs);
1887 }
1888 #endif /* CONFIG_NFS_V4_1 */
1889
1890 static void encode_sequence(struct xdr_stream *xdr,
1891                             const struct nfs4_sequence_args *args,
1892                             struct compound_hdr *hdr)
1893 {
1894 #if defined(CONFIG_NFS_V4_1)
1895         struct nfs4_session *session;
1896         struct nfs4_slot_table *tp;
1897         struct nfs4_slot *slot = args->sa_slot;
1898         __be32 *p;
1899
1900         tp = slot->table;
1901         session = tp->session;
1902         if (!session)
1903                 return;
1904
1905         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1906
1907         /*
1908          * Sessionid + seqid + slotid + max slotid + cache_this
1909          */
1910         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1911                 "max_slotid=%d cache_this=%d\n",
1912                 __func__,
1913                 ((u32 *)session->sess_id.data)[0],
1914                 ((u32 *)session->sess_id.data)[1],
1915                 ((u32 *)session->sess_id.data)[2],
1916                 ((u32 *)session->sess_id.data)[3],
1917                 slot->seq_nr, slot->slot_nr,
1918                 tp->highest_used_slotid, args->sa_cache_this);
1919         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1920         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1921         *p++ = cpu_to_be32(slot->seq_nr);
1922         *p++ = cpu_to_be32(slot->slot_nr);
1923         *p++ = cpu_to_be32(tp->highest_used_slotid);
1924         *p = cpu_to_be32(args->sa_cache_this);
1925 #endif /* CONFIG_NFS_V4_1 */
1926 }
1927
1928 #ifdef CONFIG_NFS_V4_1
1929 static void
1930 encode_getdevicelist(struct xdr_stream *xdr,
1931                      const struct nfs4_getdevicelist_args *args,
1932                      struct compound_hdr *hdr)
1933 {
1934         __be32 *p;
1935         nfs4_verifier dummy = {
1936                 .data = "dummmmmy",
1937         };
1938
1939         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1940         p = reserve_space(xdr, 16);
1941         *p++ = cpu_to_be32(args->layoutclass);
1942         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1943         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1944         encode_nfs4_verifier(xdr, &dummy);
1945 }
1946
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949                      const struct nfs4_getdeviceinfo_args *args,
1950                      struct compound_hdr *hdr)
1951 {
1952         __be32 *p;
1953
1954         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1956         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957                                     NFS4_DEVICEID4_SIZE);
1958         *p++ = cpu_to_be32(args->pdev->layout_type);
1959         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1960         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1961 }
1962
1963 static void
1964 encode_layoutget(struct xdr_stream *xdr,
1965                       const struct nfs4_layoutget_args *args,
1966                       struct compound_hdr *hdr)
1967 {
1968         __be32 *p;
1969
1970         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1971         p = reserve_space(xdr, 36);
1972         *p++ = cpu_to_be32(0);     /* Signal layout available */
1973         *p++ = cpu_to_be32(args->type);
1974         *p++ = cpu_to_be32(args->range.iomode);
1975         p = xdr_encode_hyper(p, args->range.offset);
1976         p = xdr_encode_hyper(p, args->range.length);
1977         p = xdr_encode_hyper(p, args->minlength);
1978         encode_nfs4_stateid(xdr, &args->stateid);
1979         encode_uint32(xdr, args->maxcount);
1980
1981         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1982                 __func__,
1983                 args->type,
1984                 args->range.iomode,
1985                 (unsigned long)args->range.offset,
1986                 (unsigned long)args->range.length,
1987                 args->maxcount);
1988 }
1989
1990 static int
1991 encode_layoutcommit(struct xdr_stream *xdr,
1992                     struct inode *inode,
1993                     const struct nfs4_layoutcommit_args *args,
1994                     struct compound_hdr *hdr)
1995 {
1996         __be32 *p;
1997
1998         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1999                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2000
2001         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2002         p = reserve_space(xdr, 20);
2003         /* Only whole file layouts */
2004         p = xdr_encode_hyper(p, 0); /* offset */
2005         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2006         *p = cpu_to_be32(0); /* reclaim */
2007         encode_nfs4_stateid(xdr, &args->stateid);
2008         p = reserve_space(xdr, 20);
2009         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010         p = xdr_encode_hyper(p, args->lastbytewritten);
2011         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2012         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2013
2014         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2015                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2016                         NFS_I(inode)->layout, xdr, args);
2017         else
2018                 encode_uint32(xdr, 0); /* no layout-type payload */
2019
2020         return 0;
2021 }
2022
2023 static void
2024 encode_layoutreturn(struct xdr_stream *xdr,
2025                     const struct nfs4_layoutreturn_args *args,
2026                     struct compound_hdr *hdr)
2027 {
2028         __be32 *p;
2029
2030         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2031         p = reserve_space(xdr, 16);
2032         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2033         *p++ = cpu_to_be32(args->layout_type);
2034         *p++ = cpu_to_be32(IOMODE_ANY);
2035         *p = cpu_to_be32(RETURN_FILE);
2036         p = reserve_space(xdr, 16);
2037         p = xdr_encode_hyper(p, 0);
2038         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2039         spin_lock(&args->inode->i_lock);
2040         encode_nfs4_stateid(xdr, &args->stateid);
2041         spin_unlock(&args->inode->i_lock);
2042         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2043                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2044                         NFS_I(args->inode)->layout, xdr, args);
2045         } else
2046                 encode_uint32(xdr, 0);
2047 }
2048
2049 static int
2050 encode_secinfo_no_name(struct xdr_stream *xdr,
2051                        const struct nfs41_secinfo_no_name_args *args,
2052                        struct compound_hdr *hdr)
2053 {
2054         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2055         encode_uint32(xdr, args->style);
2056         return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060                                 struct nfs41_test_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2064         encode_uint32(xdr, 1);
2065         encode_nfs4_stateid(xdr, args->stateid);
2066 }
2067
2068 static void encode_free_stateid(struct xdr_stream *xdr,
2069                                 struct nfs41_free_stateid_args *args,
2070                                 struct compound_hdr *hdr)
2071 {
2072         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2073         encode_nfs4_stateid(xdr, &args->stateid);
2074 }
2075 #endif /* CONFIG_NFS_V4_1 */
2076
2077 /*
2078  * END OF "GENERIC" ENCODE ROUTINES.
2079  */
2080
2081 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2082 {
2083 #if defined(CONFIG_NFS_V4_1)
2084         struct nfs4_session *session = args->sa_slot->table->session;
2085         if (session)
2086                 return session->clp->cl_mvops->minor_version;
2087 #endif /* CONFIG_NFS_V4_1 */
2088         return 0;
2089 }
2090
2091 /*
2092  * Encode an ACCESS request
2093  */
2094 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2095                                 const struct nfs4_accessargs *args)
2096 {
2097         struct compound_hdr hdr = {
2098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099         };
2100
2101         encode_compound_hdr(xdr, req, &hdr);
2102         encode_sequence(xdr, &args->seq_args, &hdr);
2103         encode_putfh(xdr, args->fh, &hdr);
2104         encode_access(xdr, args->access, &hdr);
2105         encode_getfattr(xdr, args->bitmask, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode LOOKUP request
2111  */
2112 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const struct nfs4_lookup_arg *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->dir_fh, &hdr);
2122         encode_lookup(xdr, args->name, &hdr);
2123         encode_getfh(xdr, &hdr);
2124         encode_getfattr(xdr, args->bitmask, &hdr);
2125         encode_nops(&hdr);
2126 }
2127
2128 /*
2129  * Encode LOOKUP_ROOT request
2130  */
2131 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2132                                      struct xdr_stream *xdr,
2133                                      const struct nfs4_lookup_root_arg *args)
2134 {
2135         struct compound_hdr hdr = {
2136                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137         };
2138
2139         encode_compound_hdr(xdr, req, &hdr);
2140         encode_sequence(xdr, &args->seq_args, &hdr);
2141         encode_putrootfh(xdr, &hdr);
2142         encode_getfh(xdr, &hdr);
2143         encode_getfattr(xdr, args->bitmask, &hdr);
2144         encode_nops(&hdr);
2145 }
2146
2147 /*
2148  * Encode REMOVE request
2149  */
2150 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2151                                 const struct nfs_removeargs *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putfh(xdr, args->fh, &hdr);
2160         encode_remove(xdr, &args->name, &hdr);
2161         encode_nops(&hdr);
2162 }
2163
2164 /*
2165  * Encode RENAME request
2166  */
2167 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2168                                 const struct nfs_renameargs *args)
2169 {
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         encode_compound_hdr(xdr, req, &hdr);
2175         encode_sequence(xdr, &args->seq_args, &hdr);
2176         encode_putfh(xdr, args->old_dir, &hdr);
2177         encode_savefh(xdr, &hdr);
2178         encode_putfh(xdr, args->new_dir, &hdr);
2179         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2180         encode_nops(&hdr);
2181 }
2182
2183 /*
2184  * Encode LINK request
2185  */
2186 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2187                              const struct nfs4_link_arg *args)
2188 {
2189         struct compound_hdr hdr = {
2190                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2191         };
2192
2193         encode_compound_hdr(xdr, req, &hdr);
2194         encode_sequence(xdr, &args->seq_args, &hdr);
2195         encode_putfh(xdr, args->fh, &hdr);
2196         encode_savefh(xdr, &hdr);
2197         encode_putfh(xdr, args->dir_fh, &hdr);
2198         encode_link(xdr, args->name, &hdr);
2199         encode_restorefh(xdr, &hdr);
2200         encode_getfattr(xdr, args->bitmask, &hdr);
2201         encode_nops(&hdr);
2202 }
2203
2204 /*
2205  * Encode CREATE request
2206  */
2207 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                                 const struct nfs4_create_arg *args)
2209 {
2210         struct compound_hdr hdr = {
2211                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212         };
2213
2214         encode_compound_hdr(xdr, req, &hdr);
2215         encode_sequence(xdr, &args->seq_args, &hdr);
2216         encode_putfh(xdr, args->dir_fh, &hdr);
2217         encode_create(xdr, args, &hdr);
2218         encode_getfh(xdr, &hdr);
2219         encode_getfattr(xdr, args->bitmask, &hdr);
2220         encode_nops(&hdr);
2221 }
2222
2223 /*
2224  * Encode SYMLINK request
2225  */
2226 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2227                                  const struct nfs4_create_arg *args)
2228 {
2229         nfs4_xdr_enc_create(req, xdr, args);
2230 }
2231
2232 /*
2233  * Encode GETATTR request
2234  */
2235 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2236                                  const struct nfs4_getattr_arg *args)
2237 {
2238         struct compound_hdr hdr = {
2239                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240         };
2241
2242         encode_compound_hdr(xdr, req, &hdr);
2243         encode_sequence(xdr, &args->seq_args, &hdr);
2244         encode_putfh(xdr, args->fh, &hdr);
2245         encode_getfattr(xdr, args->bitmask, &hdr);
2246         encode_nops(&hdr);
2247 }
2248
2249 /*
2250  * Encode a CLOSE request
2251  */
2252 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2253                                struct nfs_closeargs *args)
2254 {
2255         struct compound_hdr hdr = {
2256                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2257         };
2258
2259         encode_compound_hdr(xdr, req, &hdr);
2260         encode_sequence(xdr, &args->seq_args, &hdr);
2261         encode_putfh(xdr, args->fh, &hdr);
2262         encode_close(xdr, args, &hdr);
2263         encode_getfattr(xdr, args->bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode an OPEN request
2269  */
2270 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                               struct nfs_openargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_open(xdr, args, &hdr);
2281         encode_getfh(xdr, &hdr);
2282         if (args->access)
2283                 encode_access(xdr, args->access, &hdr);
2284         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2285         encode_nops(&hdr);
2286 }
2287
2288 /*
2289  * Encode an OPEN_CONFIRM request
2290  */
2291 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2292                                       struct xdr_stream *xdr,
2293                                       struct nfs_open_confirmargs *args)
2294 {
2295         struct compound_hdr hdr = {
2296                 .nops   = 0,
2297         };
2298
2299         encode_compound_hdr(xdr, req, &hdr);
2300         encode_putfh(xdr, args->fh, &hdr);
2301         encode_open_confirm(xdr, args, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN request with no attributes.
2307  */
2308 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2309                                      struct xdr_stream *xdr,
2310                                      struct nfs_openargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_sequence(xdr, &args->seq_args, &hdr);
2318         encode_putfh(xdr, args->fh, &hdr);
2319         encode_open(xdr, args, &hdr);
2320         if (args->access)
2321                 encode_access(xdr, args->access, &hdr);
2322         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2323         encode_nops(&hdr);
2324 }
2325
2326 /*
2327  * Encode an OPEN_DOWNGRADE request
2328  */
2329 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2330                                         struct xdr_stream *xdr,
2331                                         struct nfs_closeargs *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335         };
2336
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_sequence(xdr, &args->seq_args, &hdr);
2339         encode_putfh(xdr, args->fh, &hdr);
2340         encode_open_downgrade(xdr, args, &hdr);
2341         encode_getfattr(xdr, args->bitmask, &hdr);
2342         encode_nops(&hdr);
2343 }
2344
2345 /*
2346  * Encode a LOCK request
2347  */
2348 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2349                               struct nfs_lock_args *args)
2350 {
2351         struct compound_hdr hdr = {
2352                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2353         };
2354
2355         encode_compound_hdr(xdr, req, &hdr);
2356         encode_sequence(xdr, &args->seq_args, &hdr);
2357         encode_putfh(xdr, args->fh, &hdr);
2358         encode_lock(xdr, args, &hdr);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode a LOCKT request
2364  */
2365 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2366                                struct nfs_lockt_args *args)
2367 {
2368         struct compound_hdr hdr = {
2369                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370         };
2371
2372         encode_compound_hdr(xdr, req, &hdr);
2373         encode_sequence(xdr, &args->seq_args, &hdr);
2374         encode_putfh(xdr, args->fh, &hdr);
2375         encode_lockt(xdr, args, &hdr);
2376         encode_nops(&hdr);
2377 }
2378
2379 /*
2380  * Encode a LOCKU request
2381  */
2382 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2383                                struct nfs_locku_args *args)
2384 {
2385         struct compound_hdr hdr = {
2386                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387         };
2388
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_sequence(xdr, &args->seq_args, &hdr);
2391         encode_putfh(xdr, args->fh, &hdr);
2392         encode_locku(xdr, args, &hdr);
2393         encode_nops(&hdr);
2394 }
2395
2396 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2397                                            struct xdr_stream *xdr,
2398                                         struct nfs_release_lockowner_args *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = 0,
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2406         encode_nops(&hdr);
2407 }
2408
2409 /*
2410  * Encode a READLINK request
2411  */
2412 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2413                                   const struct nfs4_readlink *args)
2414 {
2415         struct compound_hdr hdr = {
2416                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2417         };
2418
2419         encode_compound_hdr(xdr, req, &hdr);
2420         encode_sequence(xdr, &args->seq_args, &hdr);
2421         encode_putfh(xdr, args->fh, &hdr);
2422         encode_readlink(xdr, args, req, &hdr);
2423
2424         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2425                         args->pgbase, args->pglen);
2426         encode_nops(&hdr);
2427 }
2428
2429 /*
2430  * Encode a READDIR request
2431  */
2432 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2433                                  const struct nfs4_readdir_arg *args)
2434 {
2435         struct compound_hdr hdr = {
2436                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2437         };
2438
2439         encode_compound_hdr(xdr, req, &hdr);
2440         encode_sequence(xdr, &args->seq_args, &hdr);
2441         encode_putfh(xdr, args->fh, &hdr);
2442         encode_readdir(xdr, args, req, &hdr);
2443
2444         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2445                          args->pgbase, args->count);
2446         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2447                         __func__, hdr.replen << 2, args->pages,
2448                         args->pgbase, args->count);
2449         encode_nops(&hdr);
2450 }
2451
2452 /*
2453  * Encode a READ request
2454  */
2455 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2456                               struct nfs_pgio_args *args)
2457 {
2458         struct compound_hdr hdr = {
2459                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460         };
2461
2462         encode_compound_hdr(xdr, req, &hdr);
2463         encode_sequence(xdr, &args->seq_args, &hdr);
2464         encode_putfh(xdr, args->fh, &hdr);
2465         encode_read(xdr, args, &hdr);
2466
2467         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2468                          args->pages, args->pgbase, args->count);
2469         req->rq_rcv_buf.flags |= XDRBUF_READ;
2470         encode_nops(&hdr);
2471 }
2472
2473 /*
2474  * Encode an SETATTR request
2475  */
2476 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2477                                  struct nfs_setattrargs *args)
2478 {
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_setattr(xdr, args, args->server, &hdr);
2487         encode_getfattr(xdr, args->bitmask, &hdr);
2488         encode_nops(&hdr);
2489 }
2490
2491 /*
2492  * Encode a GETACL request
2493  */
2494 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2495                                 struct nfs_getaclargs *args)
2496 {
2497         struct compound_hdr hdr = {
2498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499         };
2500         uint32_t replen;
2501
2502         encode_compound_hdr(xdr, req, &hdr);
2503         encode_sequence(xdr, &args->seq_args, &hdr);
2504         encode_putfh(xdr, args->fh, &hdr);
2505         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2506         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2507
2508         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2509                 args->acl_pages, args->acl_pgbase, args->acl_len);
2510
2511         encode_nops(&hdr);
2512 }
2513
2514 /*
2515  * Encode a WRITE request
2516  */
2517 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2518                                struct nfs_pgio_args *args)
2519 {
2520         struct compound_hdr hdr = {
2521                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2522         };
2523
2524         encode_compound_hdr(xdr, req, &hdr);
2525         encode_sequence(xdr, &args->seq_args, &hdr);
2526         encode_putfh(xdr, args->fh, &hdr);
2527         encode_write(xdr, args, &hdr);
2528         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2529         if (args->bitmask)
2530                 encode_getfattr(xdr, args->bitmask, &hdr);
2531         encode_nops(&hdr);
2532 }
2533
2534 /*
2535  *  a COMMIT request
2536  */
2537 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2538                                 struct nfs_commitargs *args)
2539 {
2540         struct compound_hdr hdr = {
2541                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542         };
2543
2544         encode_compound_hdr(xdr, req, &hdr);
2545         encode_sequence(xdr, &args->seq_args, &hdr);
2546         encode_putfh(xdr, args->fh, &hdr);
2547         encode_commit(xdr, args, &hdr);
2548         encode_nops(&hdr);
2549 }
2550
2551 /*
2552  * FSINFO request
2553  */
2554 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2555                                 struct nfs4_fsinfo_arg *args)
2556 {
2557         struct compound_hdr hdr = {
2558                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2559         };
2560
2561         encode_compound_hdr(xdr, req, &hdr);
2562         encode_sequence(xdr, &args->seq_args, &hdr);
2563         encode_putfh(xdr, args->fh, &hdr);
2564         encode_fsinfo(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * a PATHCONF request
2570  */
2571 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                   const struct nfs4_pathconf_arg *args)
2573 {
2574         struct compound_hdr hdr = {
2575                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576         };
2577
2578         encode_compound_hdr(xdr, req, &hdr);
2579         encode_sequence(xdr, &args->seq_args, &hdr);
2580         encode_putfh(xdr, args->fh, &hdr);
2581         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2582                            &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * a STATFS request
2588  */
2589 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                 const struct nfs4_statfs_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fh, &hdr);
2599         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2600                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2601         encode_nops(&hdr);
2602 }
2603
2604 /*
2605  * GETATTR_BITMAP request
2606  */
2607 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2608                                      struct xdr_stream *xdr,
2609                                      struct nfs4_server_caps_arg *args)
2610 {
2611         struct compound_hdr hdr = {
2612                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613         };
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_sequence(xdr, &args->seq_args, &hdr);
2617         encode_putfh(xdr, args->fhandle, &hdr);
2618         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2619                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2620                            FATTR4_WORD0_LINK_SUPPORT|
2621                            FATTR4_WORD0_SYMLINK_SUPPORT|
2622                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2623         encode_nops(&hdr);
2624 }
2625
2626 /*
2627  * a RENEW request
2628  */
2629 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2630                                struct nfs_client *clp)
2631 {
2632         struct compound_hdr hdr = {
2633                 .nops   = 0,
2634         };
2635
2636         encode_compound_hdr(xdr, req, &hdr);
2637         encode_renew(xdr, clp->cl_clientid, &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a SETCLIENTID request
2643  */
2644 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2645                                      struct xdr_stream *xdr,
2646                                      struct nfs4_setclientid *sc)
2647 {
2648         struct compound_hdr hdr = {
2649                 .nops   = 0,
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_setclientid(xdr, sc, &hdr);
2654         encode_nops(&hdr);
2655 }
2656
2657 /*
2658  * a SETCLIENTID_CONFIRM request
2659  */
2660 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2661                                              struct xdr_stream *xdr,
2662                                              struct nfs4_setclientid_res *arg)
2663 {
2664         struct compound_hdr hdr = {
2665                 .nops   = 0,
2666         };
2667
2668         encode_compound_hdr(xdr, req, &hdr);
2669         encode_setclientid_confirm(xdr, arg, &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * DELEGRETURN request
2675  */
2676 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2677                                      struct xdr_stream *xdr,
2678                                      const struct nfs4_delegreturnargs *args)
2679 {
2680         struct compound_hdr hdr = {
2681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682         };
2683
2684         encode_compound_hdr(xdr, req, &hdr);
2685         encode_sequence(xdr, &args->seq_args, &hdr);
2686         encode_putfh(xdr, args->fhandle, &hdr);
2687         encode_getfattr(xdr, args->bitmask, &hdr);
2688         encode_delegreturn(xdr, args->stateid, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * Encode FS_LOCATIONS request
2694  */
2695 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2696                                       struct xdr_stream *xdr,
2697                                       struct nfs4_fs_locations_arg *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702         uint32_t replen;
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_sequence(xdr, &args->seq_args, &hdr);
2706         if (args->migration) {
2707                 encode_putfh(xdr, args->fh, &hdr);
2708                 replen = hdr.replen;
2709                 encode_fs_locations(xdr, args->bitmask, &hdr);
2710                 if (args->renew)
2711                         encode_renew(xdr, args->clientid, &hdr);
2712         } else {
2713                 encode_putfh(xdr, args->dir_fh, &hdr);
2714                 encode_lookup(xdr, args->name, &hdr);
2715                 replen = hdr.replen;
2716                 encode_fs_locations(xdr, args->bitmask, &hdr);
2717         }
2718
2719         /* Set up reply kvec to capture returned fs_locations array. */
2720         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2721                         0, PAGE_SIZE);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * Encode SECINFO request
2727  */
2728 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2729                                 struct xdr_stream *xdr,
2730                                 struct nfs4_secinfo_arg *args)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_sequence(xdr, &args->seq_args, &hdr);
2738         encode_putfh(xdr, args->dir_fh, &hdr);
2739         encode_secinfo(xdr, args->name, &hdr);
2740         encode_nops(&hdr);
2741 }
2742
2743 /*
2744  * Encode FSID_PRESENT request
2745  */
2746 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2747                                       struct xdr_stream *xdr,
2748                                       struct nfs4_fsid_present_arg *args)
2749 {
2750         struct compound_hdr hdr = {
2751                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752         };
2753
2754         encode_compound_hdr(xdr, req, &hdr);
2755         encode_sequence(xdr, &args->seq_args, &hdr);
2756         encode_putfh(xdr, args->fh, &hdr);
2757         encode_getfh(xdr, &hdr);
2758         if (args->renew)
2759                 encode_renew(xdr, args->clientid, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 #if defined(CONFIG_NFS_V4_1)
2764 /*
2765  * BIND_CONN_TO_SESSION request
2766  */
2767 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2768                                 struct xdr_stream *xdr,
2769                                 struct nfs_client *clp)
2770 {
2771         struct compound_hdr hdr = {
2772                 .minorversion = clp->cl_mvops->minor_version,
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2777         encode_nops(&hdr);
2778 }
2779
2780 /*
2781  * EXCHANGE_ID request
2782  */
2783 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2784                                      struct xdr_stream *xdr,
2785                                      struct nfs41_exchange_id_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_exchange_id(xdr, args, &hdr);
2793         encode_nops(&hdr);
2794 }
2795
2796 /*
2797  * a CREATE_SESSION request
2798  */
2799 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2800                                         struct xdr_stream *xdr,
2801                                         struct nfs41_create_session_args *args)
2802 {
2803         struct compound_hdr hdr = {
2804                 .minorversion = args->client->cl_mvops->minor_version,
2805         };
2806
2807         encode_compound_hdr(xdr, req, &hdr);
2808         encode_create_session(xdr, args, &hdr);
2809         encode_nops(&hdr);
2810 }
2811
2812 /*
2813  * a DESTROY_SESSION request
2814  */
2815 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2816                                          struct xdr_stream *xdr,
2817                                          struct nfs4_session *session)
2818 {
2819         struct compound_hdr hdr = {
2820                 .minorversion = session->clp->cl_mvops->minor_version,
2821         };
2822
2823         encode_compound_hdr(xdr, req, &hdr);
2824         encode_destroy_session(xdr, session, &hdr);
2825         encode_nops(&hdr);
2826 }
2827
2828 /*
2829  * a DESTROY_CLIENTID request
2830  */
2831 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2832                                          struct xdr_stream *xdr,
2833                                          struct nfs_client *clp)
2834 {
2835         struct compound_hdr hdr = {
2836                 .minorversion = clp->cl_mvops->minor_version,
2837         };
2838
2839         encode_compound_hdr(xdr, req, &hdr);
2840         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2841         encode_nops(&hdr);
2842 }
2843
2844 /*
2845  * a SEQUENCE request
2846  */
2847 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2848                                   struct nfs4_sequence_args *args)
2849 {
2850         struct compound_hdr hdr = {
2851                 .minorversion = nfs4_xdr_minorversion(args),
2852         };
2853
2854         encode_compound_hdr(xdr, req, &hdr);
2855         encode_sequence(xdr, args, &hdr);
2856         encode_nops(&hdr);
2857 }
2858
2859 /*
2860  * a GET_LEASE_TIME request
2861  */
2862 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2863                                         struct xdr_stream *xdr,
2864                                         struct nfs4_get_lease_time_args *args)
2865 {
2866         struct compound_hdr hdr = {
2867                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2868         };
2869         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2870
2871         encode_compound_hdr(xdr, req, &hdr);
2872         encode_sequence(xdr, &args->la_seq_args, &hdr);
2873         encode_putrootfh(xdr, &hdr);
2874         encode_fsinfo(xdr, lease_bitmap, &hdr);
2875         encode_nops(&hdr);
2876 }
2877
2878 /*
2879  * a RECLAIM_COMPLETE request
2880  */
2881 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2882                                           struct xdr_stream *xdr,
2883                                 struct nfs41_reclaim_complete_args *args)
2884 {
2885         struct compound_hdr hdr = {
2886                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2887         };
2888
2889         encode_compound_hdr(xdr, req, &hdr);
2890         encode_sequence(xdr, &args->seq_args, &hdr);
2891         encode_reclaim_complete(xdr, args, &hdr);
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  * Encode GETDEVICELIST request
2897  */
2898 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2899                                        struct xdr_stream *xdr,
2900                                        struct nfs4_getdevicelist_args *args)
2901 {
2902         struct compound_hdr hdr = {
2903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_sequence(xdr, &args->seq_args, &hdr);
2908         encode_putfh(xdr, args->fh, &hdr);
2909         encode_getdevicelist(xdr, args, &hdr);
2910         encode_nops(&hdr);
2911 }
2912
2913 /*
2914  * Encode GETDEVICEINFO request
2915  */
2916 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2917                                        struct xdr_stream *xdr,
2918                                        struct nfs4_getdeviceinfo_args *args)
2919 {
2920         struct compound_hdr hdr = {
2921                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2922         };
2923
2924         encode_compound_hdr(xdr, req, &hdr);
2925         encode_sequence(xdr, &args->seq_args, &hdr);
2926         encode_getdeviceinfo(xdr, args, &hdr);
2927
2928         /* set up reply kvec. Subtract notification bitmap max size (2)
2929          * so that notification bitmap is put in xdr_buf tail */
2930         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2931                          args->pdev->pages, args->pdev->pgbase,
2932                          args->pdev->pglen);
2933
2934         encode_nops(&hdr);
2935 }
2936
2937 /*
2938  *  Encode LAYOUTGET request
2939  */
2940 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2941                                    struct xdr_stream *xdr,
2942                                    struct nfs4_layoutget_args *args)
2943 {
2944         struct compound_hdr hdr = {
2945                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2946         };
2947
2948         encode_compound_hdr(xdr, req, &hdr);
2949         encode_sequence(xdr, &args->seq_args, &hdr);
2950         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2951         encode_layoutget(xdr, args, &hdr);
2952
2953         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2954             args->layout.pages, 0, args->layout.pglen);
2955
2956         encode_nops(&hdr);
2957 }
2958
2959 /*
2960  *  Encode LAYOUTCOMMIT request
2961  */
2962 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2963                                       struct xdr_stream *xdr,
2964                                       struct nfs4_layoutcommit_args *args)
2965 {
2966         struct nfs4_layoutcommit_data *data =
2967                 container_of(args, struct nfs4_layoutcommit_data, args);
2968         struct compound_hdr hdr = {
2969                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2970         };
2971
2972         encode_compound_hdr(xdr, req, &hdr);
2973         encode_sequence(xdr, &args->seq_args, &hdr);
2974         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2975         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2976         encode_getfattr(xdr, args->bitmask, &hdr);
2977         encode_nops(&hdr);
2978 }
2979
2980 /*
2981  * Encode LAYOUTRETURN request
2982  */
2983 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2984                                       struct xdr_stream *xdr,
2985                                       struct nfs4_layoutreturn_args *args)
2986 {
2987         struct compound_hdr hdr = {
2988                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989         };
2990
2991         encode_compound_hdr(xdr, req, &hdr);
2992         encode_sequence(xdr, &args->seq_args, &hdr);
2993         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2994         encode_layoutreturn(xdr, args, &hdr);
2995         encode_nops(&hdr);
2996 }
2997
2998 /*
2999  * Encode SECINFO_NO_NAME request
3000  */
3001 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3002                                         struct xdr_stream *xdr,
3003                                         struct nfs41_secinfo_no_name_args *args)
3004 {
3005         struct compound_hdr hdr = {
3006                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007         };
3008
3009         encode_compound_hdr(xdr, req, &hdr);
3010         encode_sequence(xdr, &args->seq_args, &hdr);
3011         encode_putrootfh(xdr, &hdr);
3012         encode_secinfo_no_name(xdr, args, &hdr);
3013         encode_nops(&hdr);
3014         return 0;
3015 }
3016
3017 /*
3018  *  Encode TEST_STATEID request
3019  */
3020 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3021                                       struct xdr_stream *xdr,
3022                                       struct nfs41_test_stateid_args *args)
3023 {
3024         struct compound_hdr hdr = {
3025                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3026         };
3027
3028         encode_compound_hdr(xdr, req, &hdr);
3029         encode_sequence(xdr, &args->seq_args, &hdr);
3030         encode_test_stateid(xdr, args, &hdr);
3031         encode_nops(&hdr);
3032 }
3033
3034 /*
3035  *  Encode FREE_STATEID request
3036  */
3037 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3038                                      struct xdr_stream *xdr,
3039                                      struct nfs41_free_stateid_args *args)
3040 {
3041         struct compound_hdr hdr = {
3042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3043         };
3044
3045         encode_compound_hdr(xdr, req, &hdr);
3046         encode_sequence(xdr, &args->seq_args, &hdr);
3047         encode_free_stateid(xdr, args, &hdr);
3048         encode_nops(&hdr);
3049 }
3050 #endif /* CONFIG_NFS_V4_1 */
3051
3052 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3053 {
3054         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3055                 "Remaining buffer length is %tu words.\n",
3056                 func, xdr->end - xdr->p);
3057 }
3058
3059 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3060 {
3061         __be32 *p;
3062
3063         p = xdr_inline_decode(xdr, 4);
3064         if (unlikely(!p))
3065                 goto out_overflow;
3066         *len = be32_to_cpup(p);
3067         p = xdr_inline_decode(xdr, *len);
3068         if (unlikely(!p))
3069                 goto out_overflow;
3070         *string = (char *)p;
3071         return 0;
3072 out_overflow:
3073         print_overflow_msg(__func__, xdr);
3074         return -EIO;
3075 }
3076
3077 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3078 {
3079         __be32 *p;
3080
3081         p = xdr_inline_decode(xdr, 8);
3082         if (unlikely(!p))
3083                 goto out_overflow;
3084         hdr->status = be32_to_cpup(p++);
3085         hdr->taglen = be32_to_cpup(p);
3086
3087         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3088         if (unlikely(!p))
3089                 goto out_overflow;
3090         hdr->tag = (char *)p;
3091         p += XDR_QUADLEN(hdr->taglen);
3092         hdr->nops = be32_to_cpup(p);
3093         if (unlikely(hdr->nops < 1))
3094                 return nfs4_stat_to_errno(hdr->status);
3095         return 0;
3096 out_overflow:
3097         print_overflow_msg(__func__, xdr);
3098         return -EIO;
3099 }
3100
3101 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3102                 int *nfs_retval)
3103 {
3104         __be32 *p;
3105         uint32_t opnum;
3106         int32_t nfserr;
3107
3108         p = xdr_inline_decode(xdr, 8);
3109         if (unlikely(!p))
3110                 goto out_overflow;
3111         opnum = be32_to_cpup(p++);
3112         if (unlikely(opnum != expected))
3113                 goto out_bad_operation;
3114         nfserr = be32_to_cpup(p);
3115         if (nfserr == NFS_OK)
3116                 *nfs_retval = 0;
3117         else
3118                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3119         return true;
3120 out_bad_operation:
3121         dprintk("nfs: Server returned operation"
3122                 " %d but we issued a request for %d\n",
3123                         opnum, expected);
3124         *nfs_retval = -EREMOTEIO;
3125         return false;
3126 out_overflow:
3127         print_overflow_msg(__func__, xdr);
3128         *nfs_retval = -EIO;
3129         return false;
3130 }
3131
3132 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3133 {
3134         int retval;
3135
3136         __decode_op_hdr(xdr, expected, &retval);
3137         return retval;
3138 }
3139
3140 /* Dummy routine */
3141 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3142 {
3143         __be32 *p;
3144         unsigned int strlen;
3145         char *str;
3146
3147         p = xdr_inline_decode(xdr, 12);
3148         if (likely(p))
3149                 return decode_opaque_inline(xdr, &strlen, &str);
3150         print_overflow_msg(__func__, xdr);
3151         return -EIO;
3152 }
3153
3154 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3155 {
3156         uint32_t bmlen;
3157         __be32 *p;
3158
3159         p = xdr_inline_decode(xdr, 4);
3160         if (unlikely(!p))
3161                 goto out_overflow;
3162         bmlen = be32_to_cpup(p);
3163
3164         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3165         p = xdr_inline_decode(xdr, (bmlen << 2));
3166         if (unlikely(!p))
3167                 goto out_overflow;
3168         if (bmlen > 0) {
3169                 bitmap[0] = be32_to_cpup(p++);
3170                 if (bmlen > 1) {
3171                         bitmap[1] = be32_to_cpup(p++);
3172                         if (bmlen > 2)
3173                                 bitmap[2] = be32_to_cpup(p);
3174                 }
3175         }
3176         return 0;
3177 out_overflow:
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3183 {
3184         __be32 *p;
3185
3186         p = xdr_inline_decode(xdr, 4);
3187         if (unlikely(!p))
3188                 goto out_overflow;
3189         *attrlen = be32_to_cpup(p);
3190         *savep = xdr_stream_pos(xdr);
3191         return 0;
3192 out_overflow:
3193         print_overflow_msg(__func__, xdr);
3194         return -EIO;
3195 }
3196
3197 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3198 {
3199         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3200                 int ret;
3201                 ret = decode_attr_bitmap(xdr, bitmask);
3202                 if (unlikely(ret < 0))
3203                         return ret;
3204                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3205         } else
3206                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3207         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3208                 bitmask[0], bitmask[1], bitmask[2]);
3209         return 0;
3210 }
3211
3212 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3213 {
3214         __be32 *p;
3215         int ret = 0;
3216
3217         *type = 0;
3218         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3219                 return -EIO;
3220         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3221                 p = xdr_inline_decode(xdr, 4);
3222                 if (unlikely(!p))
3223                         goto out_overflow;
3224                 *type = be32_to_cpup(p);
3225                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3226                         dprintk("%s: bad type %d\n", __func__, *type);
3227                         return -EIO;
3228                 }
3229                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3230                 ret = NFS_ATTR_FATTR_TYPE;
3231         }
3232         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3233         return ret;
3234 out_overflow:
3235         print_overflow_msg(__func__, xdr);
3236         return -EIO;
3237 }
3238
3239 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3240                                       uint32_t *bitmap, uint32_t *type)
3241 {
3242         __be32 *p;
3243
3244         *type = 0;
3245         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3246                 return -EIO;
3247         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3248                 p = xdr_inline_decode(xdr, 4);
3249                 if (unlikely(!p))
3250                         goto out_overflow;
3251                 *type = be32_to_cpup(p);
3252                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3253         }
3254         dprintk("%s: expire type=0x%x\n", __func__, *type);
3255         return 0;
3256 out_overflow:
3257         print_overflow_msg(__func__, xdr);
3258         return -EIO;
3259 }
3260
3261 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3262 {
3263         __be32 *p;
3264         int ret = 0;
3265
3266         *change = 0;
3267         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3268                 return -EIO;
3269         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3270                 p = xdr_inline_decode(xdr, 8);
3271                 if (unlikely(!p))
3272                         goto out_overflow;
3273                 xdr_decode_hyper(p, change);
3274                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3275                 ret = NFS_ATTR_FATTR_CHANGE;
3276         }
3277         dprintk("%s: change attribute=%Lu\n", __func__,
3278                         (unsigned long long)*change);
3279         return ret;
3280 out_overflow:
3281         print_overflow_msg(__func__, xdr);
3282         return -EIO;
3283 }
3284
3285 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3286 {
3287         __be32 *p;
3288         int ret = 0;
3289
3290         *size = 0;
3291         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3292                 return -EIO;
3293         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3294                 p = xdr_inline_decode(xdr, 8);
3295                 if (unlikely(!p))
3296                         goto out_overflow;
3297                 xdr_decode_hyper(p, size);
3298                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3299                 ret = NFS_ATTR_FATTR_SIZE;
3300         }
3301         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3302         return ret;
3303 out_overflow:
3304         print_overflow_msg(__func__, xdr);
3305         return -EIO;
3306 }
3307
3308 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3309 {
3310         __be32 *p;
3311
3312         *res = 0;
3313         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3314                 return -EIO;
3315         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3316                 p = xdr_inline_decode(xdr, 4);
3317                 if (unlikely(!p))
3318                         goto out_overflow;
3319                 *res = be32_to_cpup(p);
3320                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3321         }
3322         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3323         return 0;
3324 out_overflow:
3325         print_overflow_msg(__func__, xdr);
3326         return -EIO;
3327 }
3328
3329 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3330 {
3331         __be32 *p;
3332
3333         *res = 0;
3334         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3335                 return -EIO;
3336         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3337                 p = xdr_inline_decode(xdr, 4);
3338                 if (unlikely(!p))
3339                         goto out_overflow;
3340                 *res = be32_to_cpup(p);
3341                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3342         }
3343         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3344         return 0;
3345 out_overflow:
3346         print_overflow_msg(__func__, xdr);
3347         return -EIO;
3348 }
3349
3350 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3351 {
3352         __be32 *p;
3353         int ret = 0;
3354
3355         fsid->major = 0;
3356         fsid->minor = 0;
3357         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3358                 return -EIO;
3359         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3360                 p = xdr_inline_decode(xdr, 16);
3361                 if (unlikely(!p))
3362                         goto out_overflow;
3363                 p = xdr_decode_hyper(p, &fsid->major);
3364                 xdr_decode_hyper(p, &fsid->minor);
3365                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3366                 ret = NFS_ATTR_FATTR_FSID;
3367         }
3368         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3369                         (unsigned long long)fsid->major,
3370                         (unsigned long long)fsid->minor);
3371         return ret;
3372 out_overflow:
3373         print_overflow_msg(__func__, xdr);
3374         return -EIO;
3375 }
3376
3377 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378 {
3379         __be32 *p;
3380
3381         *res = 60;
3382         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3383                 return -EIO;
3384         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3385                 p = xdr_inline_decode(xdr, 4);
3386                 if (unlikely(!p))
3387                         goto out_overflow;
3388                 *res = be32_to_cpup(p);
3389                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3390         }
3391         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3392         return 0;
3393 out_overflow:
3394         print_overflow_msg(__func__, xdr);
3395         return -EIO;
3396 }
3397
3398 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3399 {
3400         __be32 *p;
3401
3402         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3403                 return -EIO;
3404         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3405                 p = xdr_inline_decode(xdr, 4);
3406                 if (unlikely(!p))
3407                         goto out_overflow;
3408                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3409                 *res = -be32_to_cpup(p);
3410         }
3411         return 0;
3412 out_overflow:
3413         print_overflow_msg(__func__, xdr);
3414         return -EIO;
3415 }
3416
3417 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3418 {
3419         __be32 *p;
3420         int len;
3421
3422         if (fh != NULL)
3423                 memset(fh, 0, sizeof(*fh));
3424
3425         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3426                 return -EIO;
3427         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3428                 p = xdr_inline_decode(xdr, 4);
3429                 if (unlikely(!p))
3430                         goto out_overflow;
3431                 len = be32_to_cpup(p);
3432                 if (len > NFS4_FHSIZE)
3433                         return -EIO;
3434                 p = xdr_inline_decode(xdr, len);
3435                 if (unlikely(!p))
3436                         goto out_overflow;
3437                 if (fh != NULL) {
3438                         memcpy(fh->data, p, len);
3439                         fh->size = len;
3440                 }
3441                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3442         }
3443         return 0;
3444 out_overflow:
3445         print_overflow_msg(__func__, xdr);
3446         return -EIO;
3447 }
3448
3449 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3450 {
3451         __be32 *p;
3452
3453         *res = 0;
3454         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3455                 return -EIO;
3456         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3457                 p = xdr_inline_decode(xdr, 4);
3458                 if (unlikely(!p))
3459                         goto out_overflow;
3460                 *res = be32_to_cpup(p);
3461                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3462         }
3463         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3464         return 0;
3465 out_overflow:
3466         print_overflow_msg(__func__, xdr);
3467         return -EIO;
3468 }
3469
3470 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3471 {
3472         __be32 *p;
3473         int ret = 0;
3474
3475         *fileid = 0;
3476         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3477                 return -EIO;
3478         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3479                 p = xdr_inline_decode(xdr, 8);
3480                 if (unlikely(!p))
3481                         goto out_overflow;
3482                 xdr_decode_hyper(p, fileid);
3483                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3484                 ret = NFS_ATTR_FATTR_FILEID;
3485         }
3486         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3487         return ret;
3488 out_overflow:
3489         print_overflow_msg(__func__, xdr);
3490         return -EIO;
3491 }
3492
3493 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3494 {
3495         __be32 *p;
3496         int ret = 0;
3497
3498         *fileid = 0;
3499         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3500                 return -EIO;
3501         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3502                 p = xdr_inline_decode(xdr, 8);
3503                 if (unlikely(!p))
3504                         goto out_overflow;
3505                 xdr_decode_hyper(p, fileid);
3506                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3507                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3508         }
3509         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3510         return ret;
3511 out_overflow:
3512         print_overflow_msg(__func__, xdr);
3513         return -EIO;
3514 }
3515
3516 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3517 {
3518         __be32 *p;
3519         int status = 0;
3520
3521         *res = 0;
3522         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3523                 return -EIO;
3524         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3525                 p = xdr_inline_decode(xdr, 8);
3526                 if (unlikely(!p))
3527                         goto out_overflow;
3528                 xdr_decode_hyper(p, res);
3529                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3530         }
3531         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3532         return status;
3533 out_overflow:
3534         print_overflow_msg(__func__, xdr);
3535         return -EIO;
3536 }
3537
3538 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3539 {
3540         __be32 *p;
3541         int status = 0;
3542
3543         *res = 0;
3544         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3545                 return -EIO;
3546         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3547                 p = xdr_inline_decode(xdr, 8);
3548                 if (unlikely(!p))
3549                         goto out_overflow;
3550                 xdr_decode_hyper(p, res);
3551                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3552         }
3553         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3554         return status;
3555 out_overflow:
3556         print_overflow_msg(__func__, xdr);
3557         return -EIO;
3558 }
3559
3560 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3561 {
3562         __be32 *p;
3563         int status = 0;
3564
3565         *res = 0;
3566         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3567                 return -EIO;
3568         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3569                 p = xdr_inline_decode(xdr, 8);
3570                 if (unlikely(!p))
3571                         goto out_overflow;
3572                 xdr_decode_hyper(p, res);
3573                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3574         }
3575         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3576         return status;
3577 out_overflow:
3578         print_overflow_msg(__func__, xdr);
3579         return -EIO;
3580 }
3581
3582 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3583 {
3584         u32 n;
3585         __be32 *p;
3586         int status = 0;
3587
3588         p = xdr_inline_decode(xdr, 4);
3589         if (unlikely(!p))
3590                 goto out_overflow;
3591         n = be32_to_cpup(p);
3592         if (n == 0)
3593                 goto root_path;
3594         dprintk("pathname4: ");
3595         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3596                 dprintk("cannot parse %d components in path\n", n);
3597                 goto out_eio;
3598         }
3599         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3600                 struct nfs4_string *component = &path->components[path->ncomponents];
3601                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3602                 if (unlikely(status != 0))
3603                         goto out_eio;
3604                 ifdebug (XDR)
3605                         pr_cont("%s%.*s ",
3606                                 (path->ncomponents != n ? "/ " : ""),
3607                                 component->len, component->data);
3608         }
3609 out:
3610         return status;
3611 root_path:
3612 /* a root pathname is sent as a zero component4 */
3613         path->ncomponents = 1;
3614         path->components[0].len=0;
3615         path->components[0].data=NULL;
3616         dprintk("pathname4: /\n");
3617         goto out;
3618 out_eio:
3619         dprintk(" status %d", status);
3620         status = -EIO;
3621         goto out;
3622 out_overflow:
3623         print_overflow_msg(__func__, xdr);
3624         return -EIO;
3625 }
3626
3627 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3628 {
3629         int n;
3630         __be32 *p;
3631         int status = -EIO;
3632
3633         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3634                 goto out;
3635         status = 0;
3636         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3637                 goto out;
3638         status = -EIO;
3639         /* Ignore borken servers that return unrequested attrs */
3640         if (unlikely(res == NULL))
3641                 goto out;
3642         dprintk("%s: fsroot:\n", __func__);
3643         status = decode_pathname(xdr, &res->fs_path);
3644         if (unlikely(status != 0))
3645                 goto out;
3646         p = xdr_inline_decode(xdr, 4);
3647         if (unlikely(!p))
3648                 goto out_overflow;
3649         n = be32_to_cpup(p);
3650         if (n <= 0)
3651                 goto out_eio;
3652         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3653                 u32 m;
3654                 struct nfs4_fs_location *loc;
3655
3656                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3657                         break;
3658                 loc = &res->locations[res->nlocations];
3659                 p = xdr_inline_decode(xdr, 4);
3660                 if (unlikely(!p))
3661                         goto out_overflow;
3662                 m = be32_to_cpup(p);
3663
3664                 dprintk("%s: servers:\n", __func__);
3665                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3666                         struct nfs4_string *server;
3667
3668                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3669                                 unsigned int i;
3670                                 dprintk("%s: using first %u of %u servers "
3671                                         "returned for location %u\n",
3672                                                 __func__,
3673                                                 NFS4_FS_LOCATION_MAXSERVERS,
3674                                                 m, res->nlocations);
3675                                 for (i = loc->nservers; i < m; i++) {
3676                                         unsigned int len;
3677                                         char *data;
3678                                         status = decode_opaque_inline(xdr, &len, &data);
3679                                         if (unlikely(status != 0))
3680                                                 goto out_eio;
3681                                 }
3682                                 break;
3683                         }
3684                         server = &loc->servers[loc->nservers];
3685                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3686                         if (unlikely(status != 0))
3687                                 goto out_eio;
3688                         dprintk("%s ", server->data);
3689                 }
3690                 status = decode_pathname(xdr, &loc->rootpath);
3691                 if (unlikely(status != 0))
3692                         goto out_eio;
3693         }
3694         if (res->nlocations != 0)
3695                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3696 out:
3697         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3698         return status;
3699 out_overflow:
3700         print_overflow_msg(__func__, xdr);
3701 out_eio:
3702         status = -EIO;
3703         goto out;
3704 }
3705
3706 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3707 {
3708         __be32 *p;
3709         int status = 0;
3710
3711         *res = 0;
3712         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3713                 return -EIO;
3714         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3715                 p = xdr_inline_decode(xdr, 8);
3716                 if (unlikely(!p))
3717                         goto out_overflow;
3718                 xdr_decode_hyper(p, res);
3719                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3720         }
3721         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3722         return status;
3723 out_overflow:
3724         print_overflow_msg(__func__, xdr);
3725         return -EIO;
3726 }
3727
3728 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3729 {
3730         __be32 *p;
3731         int status = 0;
3732
3733         *maxlink = 1;
3734         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3735                 return -EIO;
3736         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3737                 p = xdr_inline_decode(xdr, 4);
3738                 if (unlikely(!p))
3739                         goto out_overflow;
3740                 *maxlink = be32_to_cpup(p);
3741                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3742         }
3743         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3744         return status;
3745 out_overflow:
3746         print_overflow_msg(__func__, xdr);
3747         return -EIO;
3748 }
3749
3750 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3751 {
3752         __be32 *p;
3753         int status = 0;
3754
3755         *maxname = 1024;
3756         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3757                 return -EIO;
3758         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3759                 p = xdr_inline_decode(xdr, 4);
3760                 if (unlikely(!p))
3761                         goto out_overflow;
3762                 *maxname = be32_to_cpup(p);
3763                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3764         }
3765         dprintk("%s: maxname=%u\n", __func__, *maxname);
3766         return status;
3767 out_overflow:
3768         print_overflow_msg(__func__, xdr);
3769         return -EIO;
3770 }
3771
3772 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3773 {
3774         __be32 *p;
3775         int status = 0;
3776
3777         *res = 1024;
3778         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3779                 return -EIO;
3780         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3781                 uint64_t maxread;
3782                 p = xdr_inline_decode(xdr, 8);
3783                 if (unlikely(!p))
3784                         goto out_overflow;
3785                 xdr_decode_hyper(p, &maxread);
3786                 if (maxread > 0x7FFFFFFF)
3787                         maxread = 0x7FFFFFFF;
3788                 *res = (uint32_t)maxread;
3789                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3790         }
3791         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3792         return status;
3793 out_overflow:
3794         print_overflow_msg(__func__, xdr);
3795         return -EIO;
3796 }
3797
3798 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3799 {
3800         __be32 *p;
3801         int status = 0;
3802
3803         *res = 1024;
3804         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3805                 return -EIO;
3806         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3807                 uint64_t maxwrite;
3808                 p = xdr_inline_decode(xdr, 8);
3809                 if (unlikely(!p))
3810                         goto out_overflow;
3811                 xdr_decode_hyper(p, &maxwrite);
3812                 if (maxwrite > 0x7FFFFFFF)
3813                         maxwrite = 0x7FFFFFFF;
3814                 *res = (uint32_t)maxwrite;
3815                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3816         }
3817         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3818         return status;
3819 out_overflow:
3820         print_overflow_msg(__func__, xdr);
3821         return -EIO;
3822 }
3823
3824 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3825 {
3826         uint32_t tmp;
3827         __be32 *p;
3828         int ret = 0;
3829
3830         *mode = 0;
3831         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3832                 return -EIO;
3833         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3834                 p = xdr_inline_decode(xdr, 4);
3835                 if (unlikely(!p))
3836                         goto out_overflow;
3837                 tmp = be32_to_cpup(p);
3838                 *mode = tmp & ~S_IFMT;
3839                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3840                 ret = NFS_ATTR_FATTR_MODE;
3841         }
3842         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3843         return ret;
3844 out_overflow:
3845         print_overflow_msg(__func__, xdr);
3846         return -EIO;
3847 }
3848
3849 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3850 {
3851         __be32 *p;
3852         int ret = 0;
3853
3854         *nlink = 1;
3855         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3856                 return -EIO;
3857         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3858                 p = xdr_inline_decode(xdr, 4);
3859                 if (unlikely(!p))
3860                         goto out_overflow;
3861                 *nlink = be32_to_cpup(p);
3862                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3863                 ret = NFS_ATTR_FATTR_NLINK;
3864         }
3865         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3866         return ret;
3867 out_overflow:
3868         print_overflow_msg(__func__, xdr);
3869         return -EIO;
3870 }
3871
3872 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3873                 const struct nfs_server *server, kuid_t *uid,
3874                 struct nfs4_string *owner_name)
3875 {
3876         uint32_t len;
3877         __be32 *p;
3878         int ret = 0;
3879
3880         *uid = make_kuid(&init_user_ns, -2);
3881         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3882                 return -EIO;
3883         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3884                 p = xdr_inline_decode(xdr, 4);
3885                 if (unlikely(!p))
3886                         goto out_overflow;
3887                 len = be32_to_cpup(p);
3888                 p = xdr_inline_decode(xdr, len);
3889                 if (unlikely(!p))
3890                         goto out_overflow;
3891                 if (owner_name != NULL) {
3892                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3893                         if (owner_name->data != NULL) {
3894                                 owner_name->len = len;
3895                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3896                         }
3897                 } else if (len < XDR_MAX_NETOBJ) {
3898                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3899                                 ret = NFS_ATTR_FATTR_OWNER;
3900                         else
3901                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3902                                                 __func__);
3903                 } else
3904                         dprintk("%s: name too long (%u)!\n",
3905                                         __func__, len);
3906                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3907         }
3908         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3909         return ret;
3910 out_overflow:
3911         print_overflow_msg(__func__, xdr);
3912         return -EIO;
3913 }
3914
3915 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3916                 const struct nfs_server *server, kgid_t *gid,
3917                 struct nfs4_string *group_name)
3918 {
3919         uint32_t len;
3920         __be32 *p;
3921         int ret = 0;
3922
3923         *gid = make_kgid(&init_user_ns, -2);
3924         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3925                 return -EIO;
3926         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3927                 p = xdr_inline_decode(xdr, 4);
3928                 if (unlikely(!p))
3929                         goto out_overflow;
3930                 len = be32_to_cpup(p);
3931                 p = xdr_inline_decode(xdr, len);
3932                 if (unlikely(!p))
3933                         goto out_overflow;
3934                 if (group_name != NULL) {
3935                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3936                         if (group_name->data != NULL) {
3937                                 group_name->len = len;
3938                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3939                         }
3940                 } else if (len < XDR_MAX_NETOBJ) {
3941                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3942                                 ret = NFS_ATTR_FATTR_GROUP;
3943                         else
3944                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3945                                                 __func__);
3946                 } else
3947                         dprintk("%s: name too long (%u)!\n",
3948                                         __func__, len);
3949                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3950         }
3951         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3952         return ret;
3953 out_overflow:
3954         print_overflow_msg(__func__, xdr);
3955         return -EIO;
3956 }
3957
3958 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3959 {
3960         uint32_t major = 0, minor = 0;
3961         __be32 *p;
3962         int ret = 0;
3963
3964         *rdev = MKDEV(0,0);
3965         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3966                 return -EIO;
3967         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3968                 dev_t tmp;
3969
3970                 p = xdr_inline_decode(xdr, 8);
3971                 if (unlikely(!p))
3972                         goto out_overflow;
3973                 major = be32_to_cpup(p++);
3974                 minor = be32_to_cpup(p);
3975                 tmp = MKDEV(major, minor);
3976                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3977                         *rdev = tmp;
3978                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3979                 ret = NFS_ATTR_FATTR_RDEV;
3980         }
3981         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3982         return ret;
3983 out_overflow:
3984         print_overflow_msg(__func__, xdr);
3985         return -EIO;
3986 }
3987
3988 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3989 {
3990         __be32 *p;
3991         int status = 0;
3992
3993         *res = 0;
3994         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3995                 return -EIO;
3996         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3997                 p = xdr_inline_decode(xdr, 8);
3998                 if (unlikely(!p))
3999                         goto out_overflow;
4000                 xdr_decode_hyper(p, res);
4001                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4002         }
4003         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4004         return status;
4005 out_overflow:
4006         print_overflow_msg(__func__, xdr);
4007         return -EIO;
4008 }
4009
4010 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4011 {
4012         __be32 *p;
4013         int status = 0;
4014
4015         *res = 0;
4016         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4017                 return -EIO;
4018         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4019                 p = xdr_inline_decode(xdr, 8);
4020                 if (unlikely(!p))
4021                         goto out_overflow;
4022                 xdr_decode_hyper(p, res);
4023                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4024         }
4025         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4026         return status;
4027 out_overflow:
4028         print_overflow_msg(__func__, xdr);
4029         return -EIO;
4030 }
4031
4032 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4033 {
4034         __be32 *p;
4035         int status = 0;
4036
4037         *res = 0;
4038         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4039                 return -EIO;
4040         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4041                 p = xdr_inline_decode(xdr, 8);
4042                 if (unlikely(!p))
4043                         goto out_overflow;
4044                 xdr_decode_hyper(p, res);
4045                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4046         }
4047         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4048         return status;
4049 out_overflow:
4050         print_overflow_msg(__func__, xdr);
4051         return -EIO;
4052 }
4053
4054 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4055 {
4056         __be32 *p;
4057         int ret = 0;
4058
4059         *used = 0;
4060         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4061                 return -EIO;
4062         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4063                 p = xdr_inline_decode(xdr, 8);
4064                 if (unlikely(!p))
4065                         goto out_overflow;
4066                 xdr_decode_hyper(p, used);
4067                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4068                 ret = NFS_ATTR_FATTR_SPACE_USED;
4069         }
4070         dprintk("%s: space used=%Lu\n", __func__,
4071                         (unsigned long long)*used);
4072         return ret;
4073 out_overflow:
4074         print_overflow_msg(__func__, xdr);
4075         return -EIO;
4076 }
4077
4078 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4079 {
4080         __be32 *p;
4081         uint64_t sec;
4082         uint32_t nsec;
4083
4084         p = xdr_inline_decode(xdr, 12);
4085         if (unlikely(!p))
4086                 goto out_overflow;
4087         p = xdr_decode_hyper(p, &sec);
4088         nsec = be32_to_cpup(p);
4089         time->tv_sec = (time_t)sec;
4090         time->tv_nsec = (long)nsec;
4091         return 0;
4092 out_overflow:
4093         print_overflow_msg(__func__, xdr);
4094         return -EIO;
4095 }
4096
4097 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4098 {
4099         int status = 0;
4100
4101         time->tv_sec = 0;
4102         time->tv_nsec = 0;
4103         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4104                 return -EIO;
4105         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4106                 status = decode_attr_time(xdr, time);
4107                 if (status == 0)
4108                         status = NFS_ATTR_FATTR_ATIME;
4109                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4110         }
4111         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4112         return status;
4113 }
4114
4115 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4116 {
4117         int status = 0;
4118
4119         time->tv_sec = 0;
4120         time->tv_nsec = 0;
4121         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4122                 return -EIO;
4123         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4124                 status = decode_attr_time(xdr, time);
4125                 if (status == 0)
4126                         status = NFS_ATTR_FATTR_CTIME;
4127                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4128         }
4129         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4130         return status;
4131 }
4132
4133 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4134                                   struct timespec *time)
4135 {
4136         int status = 0;
4137
4138         time->tv_sec = 0;
4139         time->tv_nsec = 0;
4140         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4141                 return -EIO;
4142         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4143                 status = decode_attr_time(xdr, time);
4144                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4145         }
4146         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4147                 (long)time->tv_nsec);
4148         return status;
4149 }
4150
4151 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4152                                         struct nfs4_label *label)
4153 {
4154         uint32_t pi = 0;
4155         uint32_t lfs = 0;
4156         __u32 len;
4157         __be32 *p;
4158         int status = 0;
4159
4160         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4161                 return -EIO;
4162         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4163                 p = xdr_inline_decode(xdr, 4);
4164                 if (unlikely(!p))
4165                         goto out_overflow;
4166                 lfs = be32_to_cpup(p++);
4167                 p = xdr_inline_decode(xdr, 4);
4168                 if (unlikely(!p))
4169                         goto out_overflow;
4170                 pi = be32_to_cpup(p++);
4171                 p = xdr_inline_decode(xdr, 4);
4172                 if (unlikely(!p))
4173                         goto out_overflow;
4174                 len = be32_to_cpup(p++);
4175                 p = xdr_inline_decode(xdr, len);
4176                 if (unlikely(!p))
4177                         goto out_overflow;
4178                 if (len < NFS4_MAXLABELLEN) {
4179                         if (label) {
4180                                 memcpy(label->label, p, len);
4181                                 label->len = len;
4182                                 label->pi = pi;
4183                                 label->lfs = lfs;
4184                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4185                         }
4186                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4187                 } else
4188                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4189                                         __func__, len);
4190         }
4191         if (label && label->label)
4192                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4193                         (char *)label->label, label->len, label->pi, label->lfs);
4194         return status;
4195
4196 out_overflow:
4197         print_overflow_msg(__func__, xdr);
4198         return -EIO;
4199 }
4200
4201 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4202 {
4203         int status = 0;
4204
4205         time->tv_sec = 0;
4206         time->tv_nsec = 0;
4207         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4208                 return -EIO;
4209         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4210                 status = decode_attr_time(xdr, time);
4211                 if (status == 0)
4212                         status = NFS_ATTR_FATTR_MTIME;
4213                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4214         }
4215         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4216         return status;
4217 }
4218
4219 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4220 {
4221         unsigned int attrwords = XDR_QUADLEN(attrlen);
4222         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4223
4224         if (unlikely(attrwords != nwords)) {
4225                 dprintk("%s: server returned incorrect attribute length: "
4226                         "%u %c %u\n",
4227                                 __func__,
4228                                 attrwords << 2,
4229                                 (attrwords < nwords) ? '<' : '>',
4230                                 nwords << 2);
4231                 return -EIO;
4232         }
4233         return 0;
4234 }
4235
4236 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4237 {
4238         __be32 *p;
4239
4240         p = xdr_inline_decode(xdr, 20);
4241         if (unlikely(!p))
4242                 goto out_overflow;
4243         cinfo->atomic = be32_to_cpup(p++);
4244         p = xdr_decode_hyper(p, &cinfo->before);
4245         xdr_decode_hyper(p, &cinfo->after);
4246         return 0;
4247 out_overflow:
4248         print_overflow_msg(__func__, xdr);
4249         return -EIO;
4250 }
4251
4252 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4253 {
4254         __be32 *p;
4255         uint32_t supp, acc;
4256         int status;
4257
4258         status = decode_op_hdr(xdr, OP_ACCESS);
4259         if (status)
4260                 return status;
4261         p = xdr_inline_decode(xdr, 8);
4262         if (unlikely(!p))
4263                 goto out_overflow;
4264         supp = be32_to_cpup(p++);
4265         acc = be32_to_cpup(p);
4266         *supported = supp;
4267         *access = acc;
4268         return 0;
4269 out_overflow:
4270         print_overflow_msg(__func__, xdr);
4271         return -EIO;
4272 }
4273
4274 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4275 {
4276         __be32 *p;
4277
4278         p = xdr_inline_decode(xdr, len);
4279         if (likely(p)) {
4280                 memcpy(buf, p, len);
4281                 return 0;
4282         }
4283         print_overflow_msg(__func__, xdr);
4284         return -EIO;
4285 }
4286
4287 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288 {
4289         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4290 }
4291
4292 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4293 {
4294         int status;
4295
4296         status = decode_op_hdr(xdr, OP_CLOSE);
4297         if (status != -EIO)
4298                 nfs_increment_open_seqid(status, res->seqid);
4299         if (!status)
4300                 status = decode_stateid(xdr, &res->stateid);
4301         return status;
4302 }
4303
4304 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4305 {
4306         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4307 }
4308
4309 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4310 {
4311         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4312 }
4313
4314 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4315 {
4316         int status;
4317
4318         status = decode_op_hdr(xdr, OP_COMMIT);
4319         if (!status)
4320                 status = decode_write_verifier(xdr, &res->verf->verifier);
4321         return status;
4322 }
4323
4324 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4325 {
4326         __be32 *p;
4327         uint32_t bmlen;
4328         int status;
4329
4330         status = decode_op_hdr(xdr, OP_CREATE);
4331         if (status)
4332                 return status;
4333         if ((status = decode_change_info(xdr, cinfo)))
4334                 return status;
4335         p = xdr_inline_decode(xdr, 4);
4336         if (unlikely(!p))
4337                 goto out_overflow;
4338         bmlen = be32_to_cpup(p);
4339         p = xdr_inline_decode(xdr, bmlen << 2);
4340         if (likely(p))
4341                 return 0;
4342 out_overflow:
4343         print_overflow_msg(__func__, xdr);
4344         return -EIO;
4345 }
4346
4347 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4348 {
4349         unsigned int savep;
4350         uint32_t attrlen, bitmap[3] = {0};
4351         int status;
4352
4353         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4354                 goto xdr_error;
4355         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4356                 goto xdr_error;
4357         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4362                                                  &res->fh_expire_type)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4365                 goto xdr_error;
4366         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4369                 goto xdr_error;
4370         status = verify_attr_len(xdr, savep, attrlen);
4371 xdr_error:
4372         dprintk("%s: xdr returned %d!\n", __func__, -status);
4373         return status;
4374 }
4375
4376 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4377 {
4378         unsigned int savep;
4379         uint32_t attrlen, bitmap[3] = {0};
4380         int status;
4381
4382         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4387                 goto xdr_error;
4388
4389         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4390                 goto xdr_error;
4391         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4400                 goto xdr_error;
4401
4402         status = verify_attr_len(xdr, savep, attrlen);
4403 xdr_error:
4404         dprintk("%s: xdr returned %d!\n", __func__, -status);
4405         return status;
4406 }
4407
4408 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4409 {
4410         unsigned int savep;
4411         uint32_t attrlen, bitmap[3] = {0};
4412         int status;
4413
4414         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4415                 goto xdr_error;
4416         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4417                 goto xdr_error;
4418         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4419                 goto xdr_error;
4420
4421         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4422                 goto xdr_error;
4423         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4424                 goto xdr_error;
4425
4426         status = verify_attr_len(xdr, savep, attrlen);
4427 xdr_error:
4428         dprintk("%s: xdr returned %d!\n", __func__, -status);
4429         return status;
4430 }
4431
4432 static int decode_threshold_hint(struct xdr_stream *xdr,
4433                                   uint32_t *bitmap,
4434                                   uint64_t *res,
4435                                   uint32_t hint_bit)
4436 {
4437         __be32 *p;
4438
4439         *res = 0;
4440         if (likely(bitmap[0] & hint_bit)) {
4441                 p = xdr_inline_decode(xdr, 8);
4442                 if (unlikely(!p))
4443                         goto out_overflow;
4444                 xdr_decode_hyper(p, res);
4445         }
4446         return 0;
4447 out_overflow:
4448         print_overflow_msg(__func__, xdr);
4449         return -EIO;
4450 }
4451
4452 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4453                                         struct nfs4_threshold *res)
4454 {
4455         __be32 *p;
4456         unsigned int savep;
4457         uint32_t bitmap[3] = {0,}, attrlen;
4458         int status;
4459
4460         /* layout type */
4461         p = xdr_inline_decode(xdr, 4);
4462         if (unlikely(!p)) {
4463                 print_overflow_msg(__func__, xdr);
4464                 return -EIO;
4465         }
4466         res->l_type = be32_to_cpup(p);
4467
4468         /* thi_hintset bitmap */
4469         status = decode_attr_bitmap(xdr, bitmap);
4470         if (status < 0)
4471                 goto xdr_error;
4472
4473         /* thi_hintlist length */
4474         status = decode_attr_length(xdr, &attrlen, &savep);
4475         if (status < 0)
4476                 goto xdr_error;
4477         /* thi_hintlist */
4478         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4479         if (status < 0)
4480                 goto xdr_error;
4481         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4482         if (status < 0)
4483                 goto xdr_error;
4484         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4485                                        THRESHOLD_RD_IO);
4486         if (status < 0)
4487                 goto xdr_error;
4488         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4489                                        THRESHOLD_WR_IO);
4490         if (status < 0)
4491                 goto xdr_error;
4492
4493         status = verify_attr_len(xdr, savep, attrlen);
4494         res->bm = bitmap[0];
4495
4496         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4497                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4498                 res->wr_io_sz);
4499 xdr_error:
4500         dprintk("%s ret=%d!\n", __func__, status);
4501         return status;
4502 }
4503
4504 /*
4505  * Thresholds on pNFS direct I/O vrs MDS I/O
4506  */
4507 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4508                                     uint32_t *bitmap,
4509                                     struct nfs4_threshold *res)
4510 {
4511         __be32 *p;
4512         int status = 0;
4513         uint32_t num;
4514
4515         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4516                 return -EIO;
4517         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4518                 /* Did the server return an unrequested attribute? */
4519                 if (unlikely(res == NULL))
4520                         return -EREMOTEIO;
4521                 p = xdr_inline_decode(xdr, 4);
4522                 if (unlikely(!p))
4523                         goto out_overflow;
4524                 num = be32_to_cpup(p);
4525                 if (num == 0)
4526                         return 0;
4527                 if (num > 1)
4528                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4529                                 "drivers per filesystem not supported\n",
4530                                 __func__);
4531
4532                 status = decode_first_threshold_item4(xdr, res);
4533                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4534         }
4535         return status;
4536 out_overflow:
4537         print_overflow_msg(__func__, xdr);
4538         return -EIO;
4539 }
4540
4541 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4542                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4543                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4544                 const struct nfs_server *server)
4545 {
4546         int status;
4547         umode_t fmode = 0;
4548         uint32_t type;
4549         int32_t err;
4550
4551         status = decode_attr_type(xdr, bitmap, &type);
4552         if (status < 0)
4553                 goto xdr_error;
4554         fattr->mode = 0;
4555         if (status != 0) {
4556                 fattr->mode |= nfs_type2fmt[type];
4557                 fattr->valid |= status;
4558         }
4559
4560         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4561         if (status < 0)
4562                 goto xdr_error;
4563         fattr->valid |= status;
4564
4565         status = decode_attr_size(xdr, bitmap, &fattr->size);
4566         if (status < 0)
4567                 goto xdr_error;
4568         fattr->valid |= status;
4569
4570         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4571         if (status < 0)
4572                 goto xdr_error;
4573         fattr->valid |= status;
4574
4575         err = 0;
4576         status = decode_attr_error(xdr, bitmap, &err);
4577         if (status < 0)
4578                 goto xdr_error;
4579
4580         status = decode_attr_filehandle(xdr, bitmap, fh);
4581         if (status < 0)
4582                 goto xdr_error;
4583
4584         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4585         if (status < 0)
4586                 goto xdr_error;
4587         fattr->valid |= status;
4588
4589         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4590         if (status < 0)
4591                 goto xdr_error;
4592         fattr->valid |= status;
4593
4594         status = decode_attr_mode(xdr, bitmap, &fmode);
4595         if (status < 0)
4596                 goto xdr_error;
4597         if (status != 0) {
4598                 fattr->mode |= fmode;
4599                 fattr->valid |= status;
4600         }
4601
4602         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4603         if (status < 0)
4604                 goto xdr_error;
4605         fattr->valid |= status;
4606
4607         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4608         if (status < 0)
4609                 goto xdr_error;
4610         fattr->valid |= status;
4611
4612         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616
4617         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4618         if (status < 0)
4619                 goto xdr_error;
4620         fattr->valid |= status;
4621
4622         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4623         if (status < 0)
4624                 goto xdr_error;
4625         fattr->valid |= status;
4626
4627         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4628         if (status < 0)
4629                 goto xdr_error;
4630         fattr->valid |= status;
4631
4632         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4633         if (status < 0)
4634                 goto xdr_error;
4635         fattr->valid |= status;
4636
4637         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4638         if (status < 0)
4639                 goto xdr_error;
4640         fattr->valid |= status;
4641
4642         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4643         if (status < 0)
4644                 goto xdr_error;
4645         fattr->valid |= status;
4646
4647         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4648         if (status < 0)
4649                 goto xdr_error;
4650
4651         if (label) {
4652                 status = decode_attr_security_label(xdr, bitmap, label);
4653                 if (status < 0)
4654                         goto xdr_error;
4655                 fattr->valid |= status;
4656         }
4657
4658 xdr_error:
4659         dprintk("%s: xdr returned %d\n", __func__, -status);
4660         return status;
4661 }
4662
4663 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4664                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4665                 struct nfs4_label *label, const struct nfs_server *server)
4666 {
4667         unsigned int savep;
4668         uint32_t attrlen,
4669                  bitmap[3] = {0};
4670         int status;
4671
4672         status = decode_op_hdr(xdr, OP_GETATTR);
4673         if (status < 0)
4674                 goto xdr_error;
4675
4676         status = decode_attr_bitmap(xdr, bitmap);
4677         if (status < 0)
4678                 goto xdr_error;
4679
4680         status = decode_attr_length(xdr, &attrlen, &savep);
4681         if (status < 0)
4682                 goto xdr_error;
4683
4684         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4685                                         label, server);
4686         if (status < 0)
4687                 goto xdr_error;
4688
4689         status = verify_attr_len(xdr, savep, attrlen);
4690 xdr_error:
4691         dprintk("%s: xdr returned %d\n", __func__, -status);
4692         return status;
4693 }
4694
4695 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4696                 struct nfs4_label *label, const struct nfs_server *server)
4697 {
4698         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4699 }
4700
4701 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4702                 const struct nfs_server *server)
4703 {
4704         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4705 }
4706
4707 /*
4708  * Decode potentially multiple layout types. Currently we only support
4709  * one layout driver per file system.
4710  */
4711 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4712                                          uint32_t *layouttype)
4713 {
4714         __be32 *p;
4715         int num;
4716
4717         p = xdr_inline_decode(xdr, 4);
4718         if (unlikely(!p))
4719                 goto out_overflow;
4720         num = be32_to_cpup(p);
4721
4722         /* pNFS is not supported by the underlying file system */
4723         if (num == 0) {
4724                 *layouttype = 0;
4725                 return 0;
4726         }
4727         if (num > 1)
4728                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4729                         "drivers per filesystem not supported\n", __func__);
4730
4731         /* Decode and set first layout type, move xdr->p past unused types */
4732         p = xdr_inline_decode(xdr, num * 4);
4733         if (unlikely(!p))
4734                 goto out_overflow;
4735         *layouttype = be32_to_cpup(p);
4736         return 0;
4737 out_overflow:
4738         print_overflow_msg(__func__, xdr);
4739         return -EIO;
4740 }
4741
4742 /*
4743  * The type of file system exported.
4744  * Note we must ensure that layouttype is set in any non-error case.
4745  */
4746 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4747                                 uint32_t *layouttype)
4748 {
4749         int status = 0;
4750
4751         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4752         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4753                 return -EIO;
4754         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4755                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4756                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4757         } else
4758                 *layouttype = 0;
4759         return status;
4760 }
4761
4762 /*
4763  * The prefered block size for layout directed io
4764  */
4765 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4766                                       uint32_t *res)
4767 {
4768         __be32 *p;
4769
4770         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4771         *res = 0;
4772         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4773                 p = xdr_inline_decode(xdr, 4);
4774                 if (unlikely(!p)) {
4775                         print_overflow_msg(__func__, xdr);
4776                         return -EIO;
4777                 }
4778                 *res = be32_to_cpup(p);
4779                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4780         }
4781         return 0;
4782 }
4783
4784 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4785 {
4786         unsigned int savep;
4787         uint32_t attrlen, bitmap[3];
4788         int status;
4789
4790         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4791                 goto xdr_error;
4792         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4793                 goto xdr_error;
4794         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4795                 goto xdr_error;
4796
4797         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4798
4799         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4800                 goto xdr_error;
4801         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4802                 goto xdr_error;
4803         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4804                 goto xdr_error;
4805         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4806         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4807                 goto xdr_error;
4808         fsinfo->wtpref = fsinfo->wtmax;
4809         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4810         if (status != 0)
4811                 goto xdr_error;
4812         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4813         if (status != 0)
4814                 goto xdr_error;
4815         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4816         if (status)
4817                 goto xdr_error;
4818
4819         status = verify_attr_len(xdr, savep, attrlen);
4820 xdr_error:
4821         dprintk("%s: xdr returned %d!\n", __func__, -status);
4822         return status;
4823 }
4824
4825 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4826 {
4827         __be32 *p;
4828         uint32_t len;
4829         int status;
4830
4831         /* Zero handle first to allow comparisons */
4832         memset(fh, 0, sizeof(*fh));
4833
4834         status = decode_op_hdr(xdr, OP_GETFH);
4835         if (status)
4836                 return status;
4837
4838         p = xdr_inline_decode(xdr, 4);
4839         if (unlikely(!p))
4840                 goto out_overflow;
4841         len = be32_to_cpup(p);
4842         if (len > NFS4_FHSIZE)
4843                 return -EIO;
4844         fh->size = len;
4845         p = xdr_inline_decode(xdr, len);
4846         if (unlikely(!p))
4847                 goto out_overflow;
4848         memcpy(fh->data, p, len);
4849         return 0;
4850 out_overflow:
4851         print_overflow_msg(__func__, xdr);
4852         return -EIO;
4853 }
4854
4855 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4856 {
4857         int status;
4858
4859         status = decode_op_hdr(xdr, OP_LINK);
4860         if (status)
4861                 return status;
4862         return decode_change_info(xdr, cinfo);
4863 }
4864
4865 /*
4866  * We create the owner, so we know a proper owner.id length is 4.
4867  */
4868 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4869 {
4870         uint64_t offset, length, clientid;
4871         __be32 *p;
4872         uint32_t namelen, type;
4873
4874         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4875         if (unlikely(!p))
4876                 goto out_overflow;
4877         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4878         p = xdr_decode_hyper(p, &length);
4879         type = be32_to_cpup(p++); /* 4 byte read */
4880         if (fl != NULL) { /* manipulate file lock */
4881                 fl->fl_start = (loff_t)offset;
4882                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4883                 if (length == ~(uint64_t)0)
4884                         fl->fl_end = OFFSET_MAX;
4885                 fl->fl_type = F_WRLCK;
4886                 if (type & 1)
4887                         fl->fl_type = F_RDLCK;
4888                 fl->fl_pid = 0;
4889         }
4890         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4891         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4892         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4893         if (likely(p))
4894                 return -NFS4ERR_DENIED;
4895 out_overflow:
4896         print_overflow_msg(__func__, xdr);
4897         return -EIO;
4898 }
4899
4900 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4901 {
4902         int status;
4903
4904         status = decode_op_hdr(xdr, OP_LOCK);
4905         if (status == -EIO)
4906                 goto out;
4907         if (status == 0) {
4908                 status = decode_stateid(xdr, &res->stateid);
4909                 if (unlikely(status))
4910                         goto out;
4911         } else if (status == -NFS4ERR_DENIED)
4912                 status = decode_lock_denied(xdr, NULL);
4913         if (res->open_seqid != NULL)
4914                 nfs_increment_open_seqid(status, res->open_seqid);
4915         nfs_increment_lock_seqid(status, res->lock_seqid);
4916 out:
4917         return status;
4918 }
4919
4920 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4921 {
4922         int status;
4923         status = decode_op_hdr(xdr, OP_LOCKT);
4924         if (status == -NFS4ERR_DENIED)
4925                 return decode_lock_denied(xdr, res->denied);
4926         return status;
4927 }
4928
4929 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4930 {
4931         int status;
4932
4933         status = decode_op_hdr(xdr, OP_LOCKU);
4934         if (status != -EIO)
4935                 nfs_increment_lock_seqid(status, res->seqid);
4936         if (status == 0)
4937                 status = decode_stateid(xdr, &res->stateid);
4938         return status;
4939 }
4940
4941 static int decode_release_lockowner(struct xdr_stream *xdr)
4942 {
4943         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4944 }
4945
4946 static int decode_lookup(struct xdr_stream *xdr)
4947 {
4948         return decode_op_hdr(xdr, OP_LOOKUP);
4949 }
4950
4951 /* This is too sick! */
4952 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4953 {
4954         __be32 *p;
4955         uint32_t limit_type, nblocks, blocksize;
4956
4957         p = xdr_inline_decode(xdr, 12);
4958         if (unlikely(!p))
4959                 goto out_overflow;
4960         limit_type = be32_to_cpup(p++);
4961         switch (limit_type) {
4962         case 1:
4963                 xdr_decode_hyper(p, maxsize);
4964                 break;
4965         case 2:
4966                 nblocks = be32_to_cpup(p++);
4967                 blocksize = be32_to_cpup(p);
4968                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4969         }
4970         return 0;
4971 out_overflow:
4972         print_overflow_msg(__func__, xdr);
4973         return -EIO;
4974 }
4975
4976 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4977 {
4978         __be32 *p;
4979         uint32_t delegation_type;
4980         int status;
4981
4982         p = xdr_inline_decode(xdr, 4);
4983         if (unlikely(!p))
4984                 goto out_overflow;
4985         delegation_type = be32_to_cpup(p);
4986         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4987                 res->delegation_type = 0;
4988                 return 0;
4989         }
4990         status = decode_stateid(xdr, &res->delegation);
4991         if (unlikely(status))
4992                 return status;
4993         p = xdr_inline_decode(xdr, 4);
4994         if (unlikely(!p))
4995                 goto out_overflow;
4996         res->do_recall = be32_to_cpup(p);
4997
4998         switch (delegation_type) {
4999         case NFS4_OPEN_DELEGATE_READ:
5000                 res->delegation_type = FMODE_READ;
5001                 break;
5002         case NFS4_OPEN_DELEGATE_WRITE:
5003                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5004                 if (decode_space_limit(xdr, &res->maxsize) < 0)
5005                                 return -EIO;
5006         }
5007         return decode_ace(xdr, NULL, res->server->nfs_client);
5008 out_overflow:
5009         print_overflow_msg(__func__, xdr);
5010         return -EIO;
5011 }
5012
5013 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5014 {
5015         __be32 *p;
5016         uint32_t savewords, bmlen, i;
5017         int status;
5018
5019         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5020                 return status;
5021         nfs_increment_open_seqid(status, res->seqid);
5022         if (status)
5023                 return status;
5024         status = decode_stateid(xdr, &res->stateid);
5025         if (unlikely(status))
5026                 return status;
5027
5028         decode_change_info(xdr, &res->cinfo);
5029
5030         p = xdr_inline_decode(xdr, 8);
5031         if (unlikely(!p))
5032                 goto out_overflow;
5033         res->rflags = be32_to_cpup(p++);
5034         bmlen = be32_to_cpup(p);
5035         if (bmlen > 10)
5036                 goto xdr_error;
5037
5038         p = xdr_inline_decode(xdr, bmlen << 2);
5039         if (unlikely(!p))
5040                 goto out_overflow;
5041         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5042         for (i = 0; i < savewords; ++i)
5043                 res->attrset[i] = be32_to_cpup(p++);
5044         for (; i < NFS4_BITMAP_SIZE; i++)
5045                 res->attrset[i] = 0;
5046
5047         return decode_delegation(xdr, res);
5048 xdr_error:
5049         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5050         return -EIO;
5051 out_overflow:
5052         print_overflow_msg(__func__, xdr);
5053         return -EIO;
5054 }
5055
5056 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5057 {
5058         int status;
5059
5060         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5061         if (status != -EIO)
5062                 nfs_increment_open_seqid(status, res->seqid);
5063         if (!status)
5064                 status = decode_stateid(xdr, &res->stateid);
5065         return status;
5066 }
5067
5068 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5069 {
5070         int status;
5071
5072         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5073         if (status != -EIO)
5074                 nfs_increment_open_seqid(status, res->seqid);
5075         if (!status)
5076                 status = decode_stateid(xdr, &res->stateid);
5077         return status;
5078 }
5079
5080 static int decode_putfh(struct xdr_stream *xdr)
5081 {
5082         return decode_op_hdr(xdr, OP_PUTFH);
5083 }
5084
5085 static int decode_putrootfh(struct xdr_stream *xdr)
5086 {
5087         return decode_op_hdr(xdr, OP_PUTROOTFH);
5088 }
5089
5090 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5091                        struct nfs_pgio_res *res)
5092 {
5093         __be32 *p;
5094         uint32_t count, eof, recvd;
5095         int status;
5096
5097         status = decode_op_hdr(xdr, OP_READ);
5098         if (status)
5099                 return status;
5100         p = xdr_inline_decode(xdr, 8);
5101         if (unlikely(!p))
5102                 goto out_overflow;
5103         eof = be32_to_cpup(p++);
5104         count = be32_to_cpup(p);
5105         recvd = xdr_read_pages(xdr, count);
5106         if (count > recvd) {
5107                 dprintk("NFS: server cheating in read reply: "
5108                                 "count %u > recvd %u\n", count, recvd);
5109                 count = recvd;
5110                 eof = 0;
5111         }
5112         res->eof = eof;
5113         res->count = count;
5114         return 0;
5115 out_overflow:
5116         print_overflow_msg(__func__, xdr);
5117         return -EIO;
5118 }
5119
5120 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5121 {
5122         int             status;
5123         __be32          verf[2];
5124
5125         status = decode_op_hdr(xdr, OP_READDIR);
5126         if (!status)
5127                 status = decode_verifier(xdr, readdir->verifier.data);
5128         if (unlikely(status))
5129                 return status;
5130         memcpy(verf, readdir->verifier.data, sizeof(verf));
5131         dprintk("%s: verifier = %08x:%08x\n",
5132                         __func__, verf[0], verf[1]);
5133         return xdr_read_pages(xdr, xdr->buf->page_len);
5134 }
5135
5136 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5137 {
5138         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5139         u32 len, recvd;
5140         __be32 *p;
5141         int status;
5142
5143         status = decode_op_hdr(xdr, OP_READLINK);
5144         if (status)
5145                 return status;
5146
5147         /* Convert length of symlink */
5148         p = xdr_inline_decode(xdr, 4);
5149         if (unlikely(!p))
5150                 goto out_overflow;
5151         len = be32_to_cpup(p);
5152         if (len >= rcvbuf->page_len || len <= 0) {
5153                 dprintk("nfs: server returned giant symlink!\n");
5154                 return -ENAMETOOLONG;
5155         }
5156         recvd = xdr_read_pages(xdr, len);
5157         if (recvd < len) {
5158                 dprintk("NFS: server cheating in readlink reply: "
5159                                 "count %u > recvd %u\n", len, recvd);
5160                 return -EIO;
5161         }
5162         /*
5163          * The XDR encode routine has set things up so that
5164          * the link text will be copied directly into the
5165          * buffer.  We just have to do overflow-checking,
5166          * and and null-terminate the text (the VFS expects
5167          * null-termination).
5168          */
5169         xdr_terminate_string(rcvbuf, len);
5170         return 0;
5171 out_overflow:
5172         print_overflow_msg(__func__, xdr);
5173         return -EIO;
5174 }
5175
5176 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5177 {
5178         int status;
5179
5180         status = decode_op_hdr(xdr, OP_REMOVE);
5181         if (status)
5182                 goto out;
5183         status = decode_change_info(xdr, cinfo);
5184 out:
5185         return status;
5186 }
5187
5188 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5189               struct nfs4_change_info *new_cinfo)
5190 {
5191         int status;
5192
5193         status = decode_op_hdr(xdr, OP_RENAME);
5194         if (status)
5195                 goto out;
5196         if ((status = decode_change_info(xdr, old_cinfo)))
5197                 goto out;
5198         status = decode_change_info(xdr, new_cinfo);
5199 out:
5200         return status;
5201 }
5202
5203 static int decode_renew(struct xdr_stream *xdr)
5204 {
5205         return decode_op_hdr(xdr, OP_RENEW);
5206 }
5207
5208 static int
5209 decode_restorefh(struct xdr_stream *xdr)
5210 {
5211         return decode_op_hdr(xdr, OP_RESTOREFH);
5212 }
5213
5214 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5215                          struct nfs_getaclres *res)
5216 {
5217         unsigned int savep;
5218         uint32_t attrlen,
5219                  bitmap[3] = {0};
5220         int status;
5221         unsigned int pg_offset;
5222
5223         res->acl_len = 0;
5224         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5225                 goto out;
5226
5227         xdr_enter_page(xdr, xdr->buf->page_len);
5228
5229         /* Calculate the offset of the page data */
5230         pg_offset = xdr->buf->head[0].iov_len;
5231
5232         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5233                 goto out;
5234         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5235                 goto out;
5236
5237         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5238                 return -EIO;
5239         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5240
5241                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5242                  * are stored with the acl data to handle the problem of
5243                  * variable length bitmaps.*/
5244                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5245                 res->acl_len = attrlen;
5246
5247                 /* Check for receive buffer overflow */
5248                 if (res->acl_len > (xdr->nwords << 2) ||
5249                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5250                         res->acl_flags |= NFS4_ACL_TRUNC;
5251                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5252                                         attrlen, xdr->nwords << 2);
5253                 }
5254         } else
5255                 status = -EOPNOTSUPP;
5256
5257 out:
5258         return status;
5259 }
5260
5261 static int
5262 decode_savefh(struct xdr_stream *xdr)
5263 {
5264         return decode_op_hdr(xdr, OP_SAVEFH);
5265 }
5266
5267 static int decode_setattr(struct xdr_stream *xdr)
5268 {
5269         __be32 *p;
5270         uint32_t bmlen;
5271         int status;
5272
5273         status = decode_op_hdr(xdr, OP_SETATTR);
5274         if (status)
5275                 return status;
5276         p = xdr_inline_decode(xdr, 4);
5277         if (unlikely(!p))
5278                 goto out_overflow;
5279         bmlen = be32_to_cpup(p);
5280         p = xdr_inline_decode(xdr, bmlen << 2);
5281         if (likely(p))
5282                 return 0;
5283 out_overflow:
5284         print_overflow_msg(__func__, xdr);
5285         return -EIO;
5286 }
5287
5288 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5289 {
5290         __be32 *p;
5291         uint32_t opnum;
5292         int32_t nfserr;
5293
5294         p = xdr_inline_decode(xdr, 8);
5295         if (unlikely(!p))
5296                 goto out_overflow;
5297         opnum = be32_to_cpup(p++);
5298         if (opnum != OP_SETCLIENTID) {
5299                 dprintk("nfs: decode_setclientid: Server returned operation"
5300                         " %d\n", opnum);
5301                 return -EIO;
5302         }
5303         nfserr = be32_to_cpup(p);
5304         if (nfserr == NFS_OK) {
5305                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5306                 if (unlikely(!p))
5307                         goto out_overflow;
5308                 p = xdr_decode_hyper(p, &res->clientid);
5309                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5310         } else if (nfserr == NFSERR_CLID_INUSE) {
5311                 uint32_t len;
5312
5313                 /* skip netid string */
5314                 p = xdr_inline_decode(xdr, 4);
5315                 if (unlikely(!p))
5316                         goto out_overflow;
5317                 len = be32_to_cpup(p);
5318                 p = xdr_inline_decode(xdr, len);
5319                 if (unlikely(!p))
5320                         goto out_overflow;
5321
5322                 /* skip uaddr string */
5323                 p = xdr_inline_decode(xdr, 4);
5324                 if (unlikely(!p))
5325                         goto out_overflow;
5326                 len = be32_to_cpup(p);
5327                 p = xdr_inline_decode(xdr, len);
5328                 if (unlikely(!p))
5329                         goto out_overflow;
5330                 return -NFSERR_CLID_INUSE;
5331         } else
5332                 return nfs4_stat_to_errno(nfserr);
5333
5334         return 0;
5335 out_overflow:
5336         print_overflow_msg(__func__, xdr);
5337         return -EIO;
5338 }
5339
5340 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5341 {
5342         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5343 }
5344
5345 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5346 {
5347         __be32 *p;
5348         int status;
5349
5350         status = decode_op_hdr(xdr, OP_WRITE);
5351         if (status)
5352                 return status;
5353
5354         p = xdr_inline_decode(xdr, 8);
5355         if (unlikely(!p))
5356                 goto out_overflow;
5357         res->count = be32_to_cpup(p++);
5358         res->verf->committed = be32_to_cpup(p++);
5359         return decode_write_verifier(xdr, &res->verf->verifier);
5360 out_overflow:
5361         print_overflow_msg(__func__, xdr);
5362         return -EIO;
5363 }
5364
5365 static int decode_delegreturn(struct xdr_stream *xdr)
5366 {
5367         return decode_op_hdr(xdr, OP_DELEGRETURN);
5368 }
5369
5370 static int decode_secinfo_gss(struct xdr_stream *xdr,
5371                               struct nfs4_secinfo4 *flavor)
5372 {
5373         u32 oid_len;
5374         __be32 *p;
5375
5376         p = xdr_inline_decode(xdr, 4);
5377         if (unlikely(!p))
5378                 goto out_overflow;
5379         oid_len = be32_to_cpup(p);
5380         if (oid_len > GSS_OID_MAX_LEN)
5381                 goto out_err;
5382
5383         p = xdr_inline_decode(xdr, oid_len);
5384         if (unlikely(!p))
5385                 goto out_overflow;
5386         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5387         flavor->flavor_info.oid.len = oid_len;
5388
5389         p = xdr_inline_decode(xdr, 8);
5390         if (unlikely(!p))
5391                 goto out_overflow;
5392         flavor->flavor_info.qop = be32_to_cpup(p++);
5393         flavor->flavor_info.service = be32_to_cpup(p);
5394
5395         return 0;
5396
5397 out_overflow:
5398         print_overflow_msg(__func__, xdr);
5399         return -EIO;
5400 out_err:
5401         return -EINVAL;
5402 }
5403
5404 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5405 {
5406         struct nfs4_secinfo4 *sec_flavor;
5407         unsigned int i, num_flavors;
5408         int status;
5409         __be32 *p;
5410
5411         p = xdr_inline_decode(xdr, 4);
5412         if (unlikely(!p))
5413                 goto out_overflow;
5414
5415         res->flavors->num_flavors = 0;
5416         num_flavors = be32_to_cpup(p);
5417
5418         for (i = 0; i < num_flavors; i++) {
5419                 sec_flavor = &res->flavors->flavors[i];
5420                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5421                         break;
5422
5423                 p = xdr_inline_decode(xdr, 4);
5424                 if (unlikely(!p))
5425                         goto out_overflow;
5426                 sec_flavor->flavor = be32_to_cpup(p);
5427
5428                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5429                         status = decode_secinfo_gss(xdr, sec_flavor);
5430                         if (status)
5431                                 goto out;
5432                 }
5433                 res->flavors->num_flavors++;
5434         }
5435
5436         status = 0;
5437 out:
5438         return status;
5439 out_overflow:
5440         print_overflow_msg(__func__, xdr);
5441         return -EIO;
5442 }
5443
5444 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445 {
5446         int status = decode_op_hdr(xdr, OP_SECINFO);
5447         if (status)
5448                 return status;
5449         return decode_secinfo_common(xdr, res);
5450 }
5451
5452 #if defined(CONFIG_NFS_V4_1)
5453 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5454 {
5455         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5456         if (status)
5457                 return status;
5458         return decode_secinfo_common(xdr, res);
5459 }
5460
5461 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5462 {
5463         __be32 *p;
5464         uint32_t bitmap_words;
5465         unsigned int i;
5466
5467         p = xdr_inline_decode(xdr, 4);
5468         bitmap_words = be32_to_cpup(p++);
5469         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5470                 return -EIO;
5471         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5472         for (i = 0; i < bitmap_words; i++)
5473                 op_map->u.words[i] = be32_to_cpup(p++);
5474
5475         return 0;
5476 }
5477
5478 static int decode_exchange_id(struct xdr_stream *xdr,
5479                               struct nfs41_exchange_id_res *res)
5480 {
5481         __be32 *p;
5482         uint32_t dummy;
5483         char *dummy_str;
5484         int status;
5485         uint32_t impl_id_count;
5486
5487         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5488         if (status)
5489                 return status;
5490
5491         p = xdr_inline_decode(xdr, 8);
5492         if (unlikely(!p))
5493                 goto out_overflow;
5494         xdr_decode_hyper(p, &res->clientid);
5495         p = xdr_inline_decode(xdr, 12);
5496         if (unlikely(!p))
5497                 goto out_overflow;
5498         res->seqid = be32_to_cpup(p++);
5499         res->flags = be32_to_cpup(p++);
5500
5501         res->state_protect.how = be32_to_cpup(p);
5502         switch (res->state_protect.how) {
5503         case SP4_NONE:
5504                 break;
5505         case SP4_MACH_CRED:
5506                 status = decode_op_map(xdr, &res->state_protect.enforce);
5507                 if (status)
5508                         return status;
5509                 status = decode_op_map(xdr, &res->state_protect.allow);
5510                 if (status)
5511                         return status;
5512                 break;
5513         default:
5514                 WARN_ON_ONCE(1);
5515                 return -EIO;
5516         }
5517
5518         /* server_owner4.so_minor_id */
5519         p = xdr_inline_decode(xdr, 8);
5520         if (unlikely(!p))
5521                 goto out_overflow;
5522         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5523
5524         /* server_owner4.so_major_id */
5525         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5526         if (unlikely(status))
5527                 return status;
5528         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5529                 return -EIO;
5530         memcpy(res->server_owner->major_id, dummy_str, dummy);
5531         res->server_owner->major_id_sz = dummy;
5532
5533         /* server_scope4 */
5534         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5535         if (unlikely(status))
5536                 return status;
5537         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5538                 return -EIO;
5539         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5540         res->server_scope->server_scope_sz = dummy;
5541
5542         /* Implementation Id */
5543         p = xdr_inline_decode(xdr, 4);
5544         if (unlikely(!p))
5545                 goto out_overflow;
5546         impl_id_count = be32_to_cpup(p++);
5547
5548         if (impl_id_count) {
5549                 /* nii_domain */
5550                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5551                 if (unlikely(status))
5552                         return status;
5553                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5554                         return -EIO;
5555                 memcpy(res->impl_id->domain, dummy_str, dummy);
5556
5557                 /* nii_name */
5558                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5559                 if (unlikely(status))
5560                         return status;
5561                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5562                         return -EIO;
5563                 memcpy(res->impl_id->name, dummy_str, dummy);
5564
5565                 /* nii_date */
5566                 p = xdr_inline_decode(xdr, 12);
5567                 if (unlikely(!p))
5568                         goto out_overflow;
5569                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5570                 res->impl_id->date.nseconds = be32_to_cpup(p);
5571
5572                 /* if there's more than one entry, ignore the rest */
5573         }
5574         return 0;
5575 out_overflow:
5576         print_overflow_msg(__func__, xdr);
5577         return -EIO;
5578 }
5579
5580 static int decode_chan_attrs(struct xdr_stream *xdr,
5581                              struct nfs4_channel_attrs *attrs)
5582 {
5583         __be32 *p;
5584         u32 nr_attrs, val;
5585
5586         p = xdr_inline_decode(xdr, 28);
5587         if (unlikely(!p))
5588                 goto out_overflow;
5589         val = be32_to_cpup(p++);        /* headerpadsz */
5590         if (val)
5591                 return -EINVAL;         /* no support for header padding yet */
5592         attrs->max_rqst_sz = be32_to_cpup(p++);
5593         attrs->max_resp_sz = be32_to_cpup(p++);
5594         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5595         attrs->max_ops = be32_to_cpup(p++);
5596         attrs->max_reqs = be32_to_cpup(p++);
5597         nr_attrs = be32_to_cpup(p);
5598         if (unlikely(nr_attrs > 1)) {
5599                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5600                         "count %u\n", __func__, nr_attrs);
5601                 return -EINVAL;
5602         }
5603         if (nr_attrs == 1) {
5604                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5605                 if (unlikely(!p))
5606                         goto out_overflow;
5607         }
5608         return 0;
5609 out_overflow:
5610         print_overflow_msg(__func__, xdr);
5611         return -EIO;
5612 }
5613
5614 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5615 {
5616         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5617 }
5618
5619 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5620                                 struct nfs41_bind_conn_to_session_res *res)
5621 {
5622         __be32 *p;
5623         int status;
5624
5625         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5626         if (!status)
5627                 status = decode_sessionid(xdr, &res->session->sess_id);
5628         if (unlikely(status))
5629                 return status;
5630
5631         /* dir flags, rdma mode bool */
5632         p = xdr_inline_decode(xdr, 8);
5633         if (unlikely(!p))
5634                 goto out_overflow;
5635
5636         res->dir = be32_to_cpup(p++);
5637         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5638                 return -EIO;
5639         if (be32_to_cpup(p) == 0)
5640                 res->use_conn_in_rdma_mode = false;
5641         else
5642                 res->use_conn_in_rdma_mode = true;
5643
5644         return 0;
5645 out_overflow:
5646         print_overflow_msg(__func__, xdr);
5647         return -EIO;
5648 }
5649
5650 static int decode_create_session(struct xdr_stream *xdr,
5651                                  struct nfs41_create_session_res *res)
5652 {
5653         __be32 *p;
5654         int status;
5655         struct nfs_client *clp = res->client;
5656         struct nfs4_session *session = clp->cl_session;
5657
5658         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5659         if (!status)
5660                 status = decode_sessionid(xdr, &session->sess_id);
5661         if (unlikely(status))
5662                 return status;
5663
5664         /* seqid, flags */
5665         p = xdr_inline_decode(xdr, 8);
5666         if (unlikely(!p))
5667                 goto out_overflow;
5668         clp->cl_seqid = be32_to_cpup(p++);
5669         session->flags = be32_to_cpup(p);
5670
5671         /* Channel attributes */
5672         status = decode_chan_attrs(xdr, &session->fc_attrs);
5673         if (!status)
5674                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5675         return status;
5676 out_overflow:
5677         print_overflow_msg(__func__, xdr);
5678         return -EIO;
5679 }
5680
5681 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5682 {
5683         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5684 }
5685
5686 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5687 {
5688         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5689 }
5690
5691 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5692 {
5693         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5694 }
5695 #endif /* CONFIG_NFS_V4_1 */
5696
5697 static int decode_sequence(struct xdr_stream *xdr,
5698                            struct nfs4_sequence_res *res,
5699                            struct rpc_rqst *rqstp)
5700 {
5701 #if defined(CONFIG_NFS_V4_1)
5702         struct nfs4_session *session;
5703         struct nfs4_sessionid id;
5704         u32 dummy;
5705         int status;
5706         __be32 *p;
5707
5708         if (res->sr_slot == NULL)
5709                 return 0;
5710         if (!res->sr_slot->table->session)
5711                 return 0;
5712
5713         status = decode_op_hdr(xdr, OP_SEQUENCE);
5714         if (!status)
5715                 status = decode_sessionid(xdr, &id);
5716         if (unlikely(status))
5717                 goto out_err;
5718
5719         /*
5720          * If the server returns different values for sessionID, slotID or
5721          * sequence number, the server is looney tunes.
5722          */
5723         status = -EREMOTEIO;
5724         session = res->sr_slot->table->session;
5725
5726         if (memcmp(id.data, session->sess_id.data,
5727                    NFS4_MAX_SESSIONID_LEN)) {
5728                 dprintk("%s Invalid session id\n", __func__);
5729                 goto out_err;
5730         }
5731
5732         p = xdr_inline_decode(xdr, 20);
5733         if (unlikely(!p))
5734                 goto out_overflow;
5735
5736         /* seqid */
5737         dummy = be32_to_cpup(p++);
5738         if (dummy != res->sr_slot->seq_nr) {
5739                 dprintk("%s Invalid sequence number\n", __func__);
5740                 goto out_err;
5741         }
5742         /* slot id */
5743         dummy = be32_to_cpup(p++);
5744         if (dummy != res->sr_slot->slot_nr) {
5745                 dprintk("%s Invalid slot id\n", __func__);
5746                 goto out_err;
5747         }
5748         /* highest slot id */
5749         res->sr_highest_slotid = be32_to_cpup(p++);
5750         /* target highest slot id */
5751         res->sr_target_highest_slotid = be32_to_cpup(p++);
5752         /* result flags */
5753         res->sr_status_flags = be32_to_cpup(p);
5754         status = 0;
5755 out_err:
5756         res->sr_status = status;
5757         return status;
5758 out_overflow:
5759         print_overflow_msg(__func__, xdr);
5760         status = -EIO;
5761         goto out_err;
5762 #else  /* CONFIG_NFS_V4_1 */
5763         return 0;
5764 #endif /* CONFIG_NFS_V4_1 */
5765 }
5766
5767 #if defined(CONFIG_NFS_V4_1)
5768 /*
5769  * TODO: Need to handle case when EOF != true;
5770  */
5771 static int decode_getdevicelist(struct xdr_stream *xdr,
5772                                 struct pnfs_devicelist *res)
5773 {
5774         __be32 *p;
5775         int status, i;
5776         nfs4_verifier verftemp;
5777
5778         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5779         if (status)
5780                 return status;
5781
5782         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5783         if (unlikely(!p))
5784                 goto out_overflow;
5785
5786         /* TODO: Skip cookie for now */
5787         p += 2;
5788
5789         /* Read verifier */
5790         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5791
5792         res->num_devs = be32_to_cpup(p);
5793
5794         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5795
5796         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5797                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5798                                 __func__, res->num_devs);
5799                 return -EIO;
5800         }
5801
5802         p = xdr_inline_decode(xdr,
5803                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5804         if (unlikely(!p))
5805                 goto out_overflow;
5806         for (i = 0; i < res->num_devs; i++)
5807                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5808                                             NFS4_DEVICEID4_SIZE);
5809         res->eof = be32_to_cpup(p);
5810         return 0;
5811 out_overflow:
5812         print_overflow_msg(__func__, xdr);
5813         return -EIO;
5814 }
5815
5816 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5817                                 struct pnfs_device *pdev)
5818 {
5819         __be32 *p;
5820         uint32_t len, type;
5821         int status;
5822
5823         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5824         if (status) {
5825                 if (status == -ETOOSMALL) {
5826                         p = xdr_inline_decode(xdr, 4);
5827                         if (unlikely(!p))
5828                                 goto out_overflow;
5829                         pdev->mincount = be32_to_cpup(p);
5830                         dprintk("%s: Min count too small. mincnt = %u\n",
5831                                 __func__, pdev->mincount);
5832                 }
5833                 return status;
5834         }
5835
5836         p = xdr_inline_decode(xdr, 8);
5837         if (unlikely(!p))
5838                 goto out_overflow;
5839         type = be32_to_cpup(p++);
5840         if (type != pdev->layout_type) {
5841                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5842                         __func__, pdev->layout_type, type);
5843                 return -EINVAL;
5844         }
5845         /*
5846          * Get the length of the opaque device_addr4. xdr_read_pages places
5847          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5848          * and places the remaining xdr data in xdr_buf->tail
5849          */
5850         pdev->mincount = be32_to_cpup(p);
5851         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5852                 goto out_overflow;
5853
5854         /* Parse notification bitmap, verifying that it is zero. */
5855         p = xdr_inline_decode(xdr, 4);
5856         if (unlikely(!p))
5857                 goto out_overflow;
5858         len = be32_to_cpup(p);
5859         if (len) {
5860                 uint32_t i;
5861
5862                 p = xdr_inline_decode(xdr, 4 * len);
5863                 if (unlikely(!p))
5864                         goto out_overflow;
5865                 for (i = 0; i < len; i++, p++) {
5866                         if (be32_to_cpup(p)) {
5867                                 dprintk("%s: notifications not supported\n",
5868                                         __func__);
5869                                 return -EIO;
5870                         }
5871                 }
5872         }
5873         return 0;
5874 out_overflow:
5875         print_overflow_msg(__func__, xdr);
5876         return -EIO;
5877 }
5878
5879 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5880                             struct nfs4_layoutget_res *res)
5881 {
5882         __be32 *p;
5883         int status;
5884         u32 layout_count;
5885         u32 recvd;
5886
5887         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5888         if (status)
5889                 return status;
5890         p = xdr_inline_decode(xdr, 4);
5891         if (unlikely(!p))
5892                 goto out_overflow;
5893         res->return_on_close = be32_to_cpup(p);
5894         decode_stateid(xdr, &res->stateid);
5895         p = xdr_inline_decode(xdr, 4);
5896         if (unlikely(!p))
5897                 goto out_overflow;
5898         layout_count = be32_to_cpup(p);
5899         if (!layout_count) {
5900                 dprintk("%s: server responded with empty layout array\n",
5901                         __func__);
5902                 return -EINVAL;
5903         }
5904
5905         p = xdr_inline_decode(xdr, 28);
5906         if (unlikely(!p))
5907                 goto out_overflow;
5908         p = xdr_decode_hyper(p, &res->range.offset);
5909         p = xdr_decode_hyper(p, &res->range.length);
5910         res->range.iomode = be32_to_cpup(p++);
5911         res->type = be32_to_cpup(p++);
5912         res->layoutp->len = be32_to_cpup(p);
5913
5914         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5915                 __func__,
5916                 (unsigned long)res->range.offset,
5917                 (unsigned long)res->range.length,
5918                 res->range.iomode,
5919                 res->type,
5920                 res->layoutp->len);
5921
5922         recvd = xdr_read_pages(xdr, res->layoutp->len);
5923         if (res->layoutp->len > recvd) {
5924                 dprintk("NFS: server cheating in layoutget reply: "
5925                                 "layout len %u > recvd %u\n",
5926                                 res->layoutp->len, recvd);
5927                 return -EINVAL;
5928         }
5929
5930         if (layout_count > 1) {
5931                 /* We only handle a length one array at the moment.  Any
5932                  * further entries are just ignored.  Note that this means
5933                  * the client may see a response that is less than the
5934                  * minimum it requested.
5935                  */
5936                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5937                         __func__, layout_count);
5938         }
5939
5940         return 0;
5941 out_overflow:
5942         print_overflow_msg(__func__, xdr);
5943         return -EIO;
5944 }
5945
5946 static int decode_layoutreturn(struct xdr_stream *xdr,
5947                                struct nfs4_layoutreturn_res *res)
5948 {
5949         __be32 *p;
5950         int status;
5951
5952         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5953         if (status)
5954                 return status;
5955         p = xdr_inline_decode(xdr, 4);
5956         if (unlikely(!p))
5957                 goto out_overflow;
5958         res->lrs_present = be32_to_cpup(p);
5959         if (res->lrs_present)
5960                 status = decode_stateid(xdr, &res->stateid);
5961         return status;
5962 out_overflow:
5963         print_overflow_msg(__func__, xdr);
5964         return -EIO;
5965 }
5966
5967 static int decode_layoutcommit(struct xdr_stream *xdr,
5968                                struct rpc_rqst *req,
5969                                struct nfs4_layoutcommit_res *res)
5970 {
5971         __be32 *p;
5972         __u32 sizechanged;
5973         int status;
5974
5975         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5976         res->status = status;
5977         if (status)
5978                 return status;
5979
5980         p = xdr_inline_decode(xdr, 4);
5981         if (unlikely(!p))
5982                 goto out_overflow;
5983         sizechanged = be32_to_cpup(p);
5984
5985         if (sizechanged) {
5986                 /* throw away new size */
5987                 p = xdr_inline_decode(xdr, 8);
5988                 if (unlikely(!p))
5989                         goto out_overflow;
5990         }
5991         return 0;
5992 out_overflow:
5993         print_overflow_msg(__func__, xdr);
5994         return -EIO;
5995 }
5996
5997 static int decode_test_stateid(struct xdr_stream *xdr,
5998                                struct nfs41_test_stateid_res *res)
5999 {
6000         __be32 *p;
6001         int status;
6002         int num_res;
6003
6004         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6005         if (status)
6006                 return status;
6007
6008         p = xdr_inline_decode(xdr, 4);
6009         if (unlikely(!p))
6010                 goto out_overflow;
6011         num_res = be32_to_cpup(p++);
6012         if (num_res != 1)
6013                 goto out;
6014
6015         p = xdr_inline_decode(xdr, 4);
6016         if (unlikely(!p))
6017                 goto out_overflow;
6018         res->status = be32_to_cpup(p++);
6019
6020         return status;
6021 out_overflow:
6022         print_overflow_msg(__func__, xdr);
6023 out:
6024         return -EIO;
6025 }
6026
6027 static int decode_free_stateid(struct xdr_stream *xdr,
6028                                struct nfs41_free_stateid_res *res)
6029 {
6030         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6031         return res->status;
6032 }
6033 #endif /* CONFIG_NFS_V4_1 */
6034
6035 /*
6036  * END OF "GENERIC" DECODE ROUTINES.
6037  */
6038
6039 /*
6040  * Decode OPEN_DOWNGRADE response
6041  */
6042 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6043                                        struct xdr_stream *xdr,
6044                                        struct nfs_closeres *res)
6045 {
6046         struct compound_hdr hdr;
6047         int status;
6048
6049         status = decode_compound_hdr(xdr, &hdr);
6050         if (status)
6051                 goto out;
6052         status = decode_sequence(xdr, &res->seq_res, rqstp);
6053         if (status)
6054                 goto out;
6055         status = decode_putfh(xdr);
6056         if (status)
6057                 goto out;
6058         status = decode_open_downgrade(xdr, res);
6059         if (status != 0)
6060                 goto out;
6061         decode_getfattr(xdr, res->fattr, res->server);
6062 out:
6063         return status;
6064 }
6065
6066 /*
6067  * Decode ACCESS response
6068  */
6069 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6070                                struct nfs4_accessres *res)
6071 {
6072         struct compound_hdr hdr;
6073         int status;
6074
6075         status = decode_compound_hdr(xdr, &hdr);
6076         if (status)
6077                 goto out;
6078         status = decode_sequence(xdr, &res->seq_res, rqstp);
6079         if (status)
6080                 goto out;
6081         status = decode_putfh(xdr);
6082         if (status != 0)
6083                 goto out;
6084         status = decode_access(xdr, &res->supported, &res->access);
6085         if (status != 0)
6086                 goto out;
6087         decode_getfattr(xdr, res->fattr, res->server);
6088 out:
6089         return status;
6090 }
6091
6092 /*
6093  * Decode LOOKUP response
6094  */
6095 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6096                                struct nfs4_lookup_res *res)
6097 {
6098         struct compound_hdr hdr;
6099         int status;
6100
6101         status = decode_compound_hdr(xdr, &hdr);
6102         if (status)
6103                 goto out;
6104         status = decode_sequence(xdr, &res->seq_res, rqstp);
6105         if (status)
6106                 goto out;
6107         status = decode_putfh(xdr);
6108         if (status)
6109                 goto out;
6110         status = decode_lookup(xdr);
6111         if (status)
6112                 goto out;
6113         status = decode_getfh(xdr, res->fh);
6114         if (status)
6115                 goto out;
6116         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6117 out:
6118         return status;
6119 }
6120
6121 /*
6122  * Decode LOOKUP_ROOT response
6123  */
6124 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6125                                     struct xdr_stream *xdr,
6126                                     struct nfs4_lookup_res *res)
6127 {
6128         struct compound_hdr hdr;
6129         int status;
6130
6131         status = decode_compound_hdr(xdr, &hdr);
6132         if (status)
6133                 goto out;
6134         status = decode_sequence(xdr, &res->seq_res, rqstp);
6135         if (status)
6136                 goto out;
6137         status = decode_putrootfh(xdr);
6138         if (status)
6139                 goto out;
6140         status = decode_getfh(xdr, res->fh);
6141         if (status == 0)
6142                 status = decode_getfattr_label(xdr, res->fattr,
6143                                                 res->label, res->server);
6144 out:
6145         return status;
6146 }
6147
6148 /*
6149  * Decode REMOVE response
6150  */
6151 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6152                                struct nfs_removeres *res)
6153 {
6154         struct compound_hdr hdr;
6155         int status;
6156
6157         status = decode_compound_hdr(xdr, &hdr);
6158         if (status)
6159                 goto out;
6160         status = decode_sequence(xdr, &res->seq_res, rqstp);
6161         if (status)
6162                 goto out;
6163         status = decode_putfh(xdr);
6164         if (status)
6165                 goto out;
6166         status = decode_remove(xdr, &res->cinfo);
6167 out:
6168         return status;
6169 }
6170
6171 /*
6172  * Decode RENAME response
6173  */
6174 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6175                                struct nfs_renameres *res)
6176 {
6177         struct compound_hdr hdr;
6178         int status;
6179
6180         status = decode_compound_hdr(xdr, &hdr);
6181         if (status)
6182                 goto out;
6183         status = decode_sequence(xdr, &res->seq_res, rqstp);
6184         if (status)
6185                 goto out;
6186         status = decode_putfh(xdr);
6187         if (status)
6188                 goto out;
6189         status = decode_savefh(xdr);
6190         if (status)
6191                 goto out;
6192         status = decode_putfh(xdr);
6193         if (status)
6194                 goto out;
6195         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6196 out:
6197         return status;
6198 }
6199
6200 /*
6201  * Decode LINK response
6202  */
6203 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6204                              struct nfs4_link_res *res)
6205 {
6206         struct compound_hdr hdr;
6207         int status;
6208
6209         status = decode_compound_hdr(xdr, &hdr);
6210         if (status)
6211                 goto out;
6212         status = decode_sequence(xdr, &res->seq_res, rqstp);
6213         if (status)
6214                 goto out;
6215         status = decode_putfh(xdr);
6216         if (status)
6217                 goto out;
6218         status = decode_savefh(xdr);
6219         if (status)
6220                 goto out;
6221         status = decode_putfh(xdr);
6222         if (status)
6223                 goto out;
6224         status = decode_link(xdr, &res->cinfo);
6225         if (status)
6226                 goto out;
6227         /*
6228          * Note order: OP_LINK leaves the directory as the current
6229          *             filehandle.
6230          */
6231         status = decode_restorefh(xdr);
6232         if (status)
6233                 goto out;
6234         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6235 out:
6236         return status;
6237 }
6238
6239 /*
6240  * Decode CREATE response
6241  */
6242 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6243                                struct nfs4_create_res *res)
6244 {
6245         struct compound_hdr hdr;
6246         int status;
6247
6248         status = decode_compound_hdr(xdr, &hdr);
6249         if (status)
6250                 goto out;
6251         status = decode_sequence(xdr, &res->seq_res, rqstp);
6252         if (status)
6253                 goto out;
6254         status = decode_putfh(xdr);
6255         if (status)
6256                 goto out;
6257         status = decode_create(xdr, &res->dir_cinfo);
6258         if (status)
6259                 goto out;
6260         status = decode_getfh(xdr, res->fh);
6261         if (status)
6262                 goto out;
6263         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6264 out:
6265         return status;
6266 }
6267
6268 /*
6269  * Decode SYMLINK response
6270  */
6271 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6272                                 struct nfs4_create_res *res)
6273 {
6274         return nfs4_xdr_dec_create(rqstp, xdr, res);
6275 }
6276
6277 /*
6278  * Decode GETATTR response
6279  */
6280 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6281                                 struct nfs4_getattr_res *res)
6282 {
6283         struct compound_hdr hdr;
6284         int status;
6285
6286         status = decode_compound_hdr(xdr, &hdr);
6287         if (status)
6288                 goto out;
6289         status = decode_sequence(xdr, &res->seq_res, rqstp);
6290         if (status)
6291                 goto out;
6292         status = decode_putfh(xdr);
6293         if (status)
6294                 goto out;
6295         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6296 out:
6297         return status;
6298 }
6299
6300 /*
6301  * Encode an SETACL request
6302  */
6303 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6304                                 struct nfs_setaclargs *args)
6305 {
6306         struct compound_hdr hdr = {
6307                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6308         };
6309
6310         encode_compound_hdr(xdr, req, &hdr);
6311         encode_sequence(xdr, &args->seq_args, &hdr);
6312         encode_putfh(xdr, args->fh, &hdr);
6313         encode_setacl(xdr, args, &hdr);
6314         encode_nops(&hdr);
6315 }
6316
6317 /*
6318  * Decode SETACL response
6319  */
6320 static int
6321 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6322                     struct nfs_setaclres *res)
6323 {
6324         struct compound_hdr hdr;
6325         int status;
6326
6327         status = decode_compound_hdr(xdr, &hdr);
6328         if (status)
6329                 goto out;
6330         status = decode_sequence(xdr, &res->seq_res, rqstp);
6331         if (status)
6332                 goto out;
6333         status = decode_putfh(xdr);
6334         if (status)
6335                 goto out;
6336         status = decode_setattr(xdr);
6337 out:
6338         return status;
6339 }
6340
6341 /*
6342  * Decode GETACL response
6343  */
6344 static int
6345 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346                     struct nfs_getaclres *res)
6347 {
6348         struct compound_hdr hdr;
6349         int status;
6350
6351         if (res->acl_scratch != NULL) {
6352                 void *p = page_address(res->acl_scratch);
6353                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6354         }
6355         status = decode_compound_hdr(xdr, &hdr);
6356         if (status)
6357                 goto out;
6358         status = decode_sequence(xdr, &res->seq_res, rqstp);
6359         if (status)
6360                 goto out;
6361         status = decode_putfh(xdr);
6362         if (status)
6363                 goto out;
6364         status = decode_getacl(xdr, rqstp, res);
6365
6366 out:
6367         return status;
6368 }
6369
6370 /*
6371  * Decode CLOSE response
6372  */
6373 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374                               struct nfs_closeres *res)
6375 {
6376         struct compound_hdr hdr;
6377         int status;
6378
6379         status = decode_compound_hdr(xdr, &hdr);
6380         if (status)
6381                 goto out;
6382         status = decode_sequence(xdr, &res->seq_res, rqstp);
6383         if (status)
6384                 goto out;
6385         status = decode_putfh(xdr);
6386         if (status)
6387                 goto out;
6388         status = decode_close(xdr, res);
6389         if (status != 0)
6390                 goto out;
6391         /*
6392          * Note: Server may do delete on close for this file
6393          *      in which case the getattr call will fail with
6394          *      an ESTALE error. Shouldn't be a problem,
6395          *      though, since fattr->valid will remain unset.
6396          */
6397         decode_getfattr(xdr, res->fattr, res->server);
6398 out:
6399         return status;
6400 }
6401
6402 /*
6403  * Decode OPEN response
6404  */
6405 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406                              struct nfs_openres *res)
6407 {
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_open(xdr, res);
6421         if (status)
6422                 goto out;
6423         status = decode_getfh(xdr, &res->fh);
6424         if (status)
6425                 goto out;
6426         if (res->access_request)
6427                 decode_access(xdr, &res->access_supported, &res->access_result);
6428         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6429 out:
6430         return status;
6431 }
6432
6433 /*
6434  * Decode OPEN_CONFIRM response
6435  */
6436 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6437                                      struct xdr_stream *xdr,
6438                                      struct nfs_open_confirmres *res)
6439 {
6440         struct compound_hdr hdr;
6441         int status;
6442
6443         status = decode_compound_hdr(xdr, &hdr);
6444         if (status)
6445                 goto out;
6446         status = decode_putfh(xdr);
6447         if (status)
6448                 goto out;
6449         status = decode_open_confirm(xdr, res);
6450 out:
6451         return status;
6452 }
6453
6454 /*
6455  * Decode OPEN response
6456  */
6457 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6458                                     struct xdr_stream *xdr,
6459                                     struct nfs_openres *res)
6460 {
6461         struct compound_hdr hdr;
6462         int status;
6463
6464         status = decode_compound_hdr(xdr, &hdr);
6465         if (status)
6466                 goto out;
6467         status = decode_sequence(xdr, &res->seq_res, rqstp);
6468         if (status)
6469                 goto out;
6470         status = decode_putfh(xdr);
6471         if (status)
6472                 goto out;
6473         status = decode_open(xdr, res);
6474         if (status)
6475                 goto out;
6476         if (res->access_request)
6477                 decode_access(xdr, &res->access_supported, &res->access_result);
6478         decode_getfattr(xdr, res->f_attr, res->server);
6479 out:
6480         return status;
6481 }
6482
6483 /*
6484  * Decode SETATTR response
6485  */
6486 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6487                                 struct xdr_stream *xdr,
6488                                 struct nfs_setattrres *res)
6489 {
6490         struct compound_hdr hdr;
6491         int status;
6492
6493         status = decode_compound_hdr(xdr, &hdr);
6494         if (status)
6495                 goto out;
6496         status = decode_sequence(xdr, &res->seq_res, rqstp);
6497         if (status)
6498                 goto out;
6499         status = decode_putfh(xdr);
6500         if (status)
6501                 goto out;
6502         status = decode_setattr(xdr);
6503         if (status)
6504                 goto out;
6505         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6506 out:
6507         return status;
6508 }
6509
6510 /*
6511  * Decode LOCK response
6512  */
6513 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6514                              struct nfs_lock_res *res)
6515 {
6516         struct compound_hdr hdr;
6517         int status;
6518
6519         status = decode_compound_hdr(xdr, &hdr);
6520         if (status)
6521                 goto out;
6522         status = decode_sequence(xdr, &res->seq_res, rqstp);
6523         if (status)
6524                 goto out;
6525         status = decode_putfh(xdr);
6526         if (status)
6527                 goto out;
6528         status = decode_lock(xdr, res);
6529 out:
6530         return status;
6531 }
6532
6533 /*
6534  * Decode LOCKT response
6535  */
6536 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6537                               struct nfs_lockt_res *res)
6538 {
6539         struct compound_hdr hdr;
6540         int status;
6541
6542         status = decode_compound_hdr(xdr, &hdr);
6543         if (status)
6544                 goto out;
6545         status = decode_sequence(xdr, &res->seq_res, rqstp);
6546         if (status)
6547                 goto out;
6548         status = decode_putfh(xdr);
6549         if (status)
6550                 goto out;
6551         status = decode_lockt(xdr, res);
6552 out:
6553         return status;
6554 }
6555
6556 /*
6557  * Decode LOCKU response
6558  */
6559 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6560                               struct nfs_locku_res *res)
6561 {
6562         struct compound_hdr hdr;
6563         int status;
6564
6565         status = decode_compound_hdr(xdr, &hdr);
6566         if (status)
6567                 goto out;
6568         status = decode_sequence(xdr, &res->seq_res, rqstp);
6569         if (status)
6570                 goto out;
6571         status = decode_putfh(xdr);
6572         if (status)
6573                 goto out;
6574         status = decode_locku(xdr, res);
6575 out:
6576         return status;
6577 }
6578
6579 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6580                                           struct xdr_stream *xdr, void *dummy)
6581 {
6582         struct compound_hdr hdr;
6583         int status;
6584
6585         status = decode_compound_hdr(xdr, &hdr);
6586         if (!status)
6587                 status = decode_release_lockowner(xdr);
6588         return status;
6589 }
6590
6591 /*
6592  * Decode READLINK response
6593  */
6594 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6595                                  struct xdr_stream *xdr,
6596                                  struct nfs4_readlink_res *res)
6597 {
6598         struct compound_hdr hdr;
6599         int status;
6600
6601         status = decode_compound_hdr(xdr, &hdr);
6602         if (status)
6603                 goto out;
6604         status = decode_sequence(xdr, &res->seq_res, rqstp);
6605         if (status)
6606                 goto out;
6607         status = decode_putfh(xdr);
6608         if (status)
6609                 goto out;
6610         status = decode_readlink(xdr, rqstp);
6611 out:
6612         return status;
6613 }
6614
6615 /*
6616  * Decode READDIR response
6617  */
6618 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6619                                 struct nfs4_readdir_res *res)
6620 {
6621         struct compound_hdr hdr;
6622         int status;
6623
6624         status = decode_compound_hdr(xdr, &hdr);
6625         if (status)
6626                 goto out;
6627         status = decode_sequence(xdr, &res->seq_res, rqstp);
6628         if (status)
6629                 goto out;
6630         status = decode_putfh(xdr);
6631         if (status)
6632                 goto out;
6633         status = decode_readdir(xdr, rqstp, res);
6634 out:
6635         return status;
6636 }
6637
6638 /*
6639  * Decode Read response
6640  */
6641 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6642                              struct nfs_pgio_res *res)
6643 {
6644         struct compound_hdr hdr;
6645         int status;
6646
6647         status = decode_compound_hdr(xdr, &hdr);
6648         if (status)
6649                 goto out;
6650         status = decode_sequence(xdr, &res->seq_res, rqstp);
6651         if (status)
6652                 goto out;
6653         status = decode_putfh(xdr);
6654         if (status)
6655                 goto out;
6656         status = decode_read(xdr, rqstp, res);
6657         if (!status)
6658                 status = res->count;
6659 out:
6660         return status;
6661 }
6662
6663 /*
6664  * Decode WRITE response
6665  */
6666 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6667                               struct nfs_pgio_res *res)
6668 {
6669         struct compound_hdr hdr;
6670         int status;
6671
6672         status = decode_compound_hdr(xdr, &hdr);
6673         if (status)
6674                 goto out;
6675         status = decode_sequence(xdr, &res->seq_res, rqstp);
6676         if (status)
6677                 goto out;
6678         status = decode_putfh(xdr);
6679         if (status)
6680                 goto out;
6681         status = decode_write(xdr, res);
6682         if (status)
6683                 goto out;
6684         if (res->fattr)
6685                 decode_getfattr(xdr, res->fattr, res->server);
6686         if (!status)
6687                 status = res->count;
6688 out:
6689         return status;
6690 }
6691
6692 /*
6693  * Decode COMMIT response
6694  */
6695 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696                                struct nfs_commitres *res)
6697 {
6698         struct compound_hdr hdr;
6699         int status;
6700
6701         status = decode_compound_hdr(xdr, &hdr);
6702         if (status)
6703                 goto out;
6704         status = decode_sequence(xdr, &res->seq_res, rqstp);
6705         if (status)
6706                 goto out;
6707         status = decode_putfh(xdr);
6708         if (status)
6709                 goto out;
6710         status = decode_commit(xdr, res);
6711 out:
6712         return status;
6713 }
6714
6715 /*
6716  * Decode FSINFO response
6717  */
6718 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6719                                struct nfs4_fsinfo_res *res)
6720 {
6721         struct compound_hdr hdr;
6722         int status;
6723
6724         status = decode_compound_hdr(xdr, &hdr);
6725         if (!status)
6726                 status = decode_sequence(xdr, &res->seq_res, req);
6727         if (!status)
6728                 status = decode_putfh(xdr);
6729         if (!status)
6730                 status = decode_fsinfo(xdr, res->fsinfo);
6731         return status;
6732 }
6733
6734 /*
6735  * Decode PATHCONF response
6736  */
6737 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6738                                  struct nfs4_pathconf_res *res)
6739 {
6740         struct compound_hdr hdr;
6741         int status;
6742
6743         status = decode_compound_hdr(xdr, &hdr);
6744         if (!status)
6745                 status = decode_sequence(xdr, &res->seq_res, req);
6746         if (!status)
6747                 status = decode_putfh(xdr);
6748         if (!status)
6749                 status = decode_pathconf(xdr, res->pathconf);
6750         return status;
6751 }
6752
6753 /*
6754  * Decode STATFS response
6755  */
6756 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6757                                struct nfs4_statfs_res *res)
6758 {
6759         struct compound_hdr hdr;
6760         int status;
6761
6762         status = decode_compound_hdr(xdr, &hdr);
6763         if (!status)
6764                 status = decode_sequence(xdr, &res->seq_res, req);
6765         if (!status)
6766                 status = decode_putfh(xdr);
6767         if (!status)
6768                 status = decode_statfs(xdr, res->fsstat);
6769         return status;
6770 }
6771
6772 /*
6773  * Decode GETATTR_BITMAP response
6774  */
6775 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6776                                     struct xdr_stream *xdr,
6777                                     struct nfs4_server_caps_res *res)
6778 {
6779         struct compound_hdr hdr;
6780         int status;
6781
6782         status = decode_compound_hdr(xdr, &hdr);
6783         if (status)
6784                 goto out;
6785         status = decode_sequence(xdr, &res->seq_res, req);
6786         if (status)
6787                 goto out;
6788         status = decode_putfh(xdr);
6789         if (status)
6790                 goto out;
6791         status = decode_server_caps(xdr, res);
6792 out:
6793         return status;
6794 }
6795
6796 /*
6797  * Decode RENEW response
6798  */
6799 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6800                               void *__unused)
6801 {
6802         struct compound_hdr hdr;
6803         int status;
6804
6805         status = decode_compound_hdr(xdr, &hdr);
6806         if (!status)
6807                 status = decode_renew(xdr);
6808         return status;
6809 }
6810
6811 /*
6812  * Decode SETCLIENTID response
6813  */
6814 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6815                                     struct xdr_stream *xdr,
6816                                     struct nfs4_setclientid_res *res)
6817 {
6818         struct compound_hdr hdr;
6819         int status;
6820
6821         status = decode_compound_hdr(xdr, &hdr);
6822         if (!status)
6823                 status = decode_setclientid(xdr, res);
6824         return status;
6825 }
6826
6827 /*
6828  * Decode SETCLIENTID_CONFIRM response
6829  */
6830 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6831                                             struct xdr_stream *xdr)
6832 {
6833         struct compound_hdr hdr;
6834         int status;
6835
6836         status = decode_compound_hdr(xdr, &hdr);
6837         if (!status)
6838                 status = decode_setclientid_confirm(xdr);
6839         return status;
6840 }
6841
6842 /*
6843  * Decode DELEGRETURN response
6844  */
6845 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6846                                     struct xdr_stream *xdr,
6847                                     struct nfs4_delegreturnres *res)
6848 {
6849         struct compound_hdr hdr;
6850         int status;
6851
6852         status = decode_compound_hdr(xdr, &hdr);
6853         if (status)
6854                 goto out;
6855         status = decode_sequence(xdr, &res->seq_res, rqstp);
6856         if (status)
6857                 goto out;
6858         status = decode_putfh(xdr);
6859         if (status != 0)
6860                 goto out;
6861         status = decode_getfattr(xdr, res->fattr, res->server);
6862         if (status != 0)
6863                 goto out;
6864         status = decode_delegreturn(xdr);
6865 out:
6866         return status;
6867 }
6868
6869 /*
6870  * Decode FS_LOCATIONS response
6871  */
6872 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6873                                      struct xdr_stream *xdr,
6874                                      struct nfs4_fs_locations_res *res)
6875 {
6876         struct compound_hdr hdr;
6877         int status;
6878
6879         status = decode_compound_hdr(xdr, &hdr);
6880         if (status)
6881                 goto out;
6882         status = decode_sequence(xdr, &res->seq_res, req);
6883         if (status)
6884                 goto out;
6885         status = decode_putfh(xdr);
6886         if (status)
6887                 goto out;
6888         if (res->migration) {
6889                 xdr_enter_page(xdr, PAGE_SIZE);
6890                 status = decode_getfattr_generic(xdr,
6891                                         &res->fs_locations->fattr,
6892                                          NULL, res->fs_locations,
6893                                          NULL, res->fs_locations->server);
6894                 if (status)
6895                         goto out;
6896                 if (res->renew)
6897                         status = decode_renew(xdr);
6898         } else {
6899                 status = decode_lookup(xdr);
6900                 if (status)
6901                         goto out;
6902                 xdr_enter_page(xdr, PAGE_SIZE);
6903                 status = decode_getfattr_generic(xdr,
6904                                         &res->fs_locations->fattr,
6905                                          NULL, res->fs_locations,
6906                                          NULL, res->fs_locations->server);
6907         }
6908 out:
6909         return status;
6910 }
6911
6912 /*
6913  * Decode SECINFO response
6914  */
6915 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6916                                 struct xdr_stream *xdr,
6917                                 struct nfs4_secinfo_res *res)
6918 {
6919         struct compound_hdr hdr;
6920         int status;
6921
6922         status = decode_compound_hdr(xdr, &hdr);
6923         if (status)
6924                 goto out;
6925         status = decode_sequence(xdr, &res->seq_res, rqstp);
6926         if (status)
6927                 goto out;
6928         status = decode_putfh(xdr);
6929         if (status)
6930                 goto out;
6931         status = decode_secinfo(xdr, res);
6932 out:
6933         return status;
6934 }
6935
6936 /*
6937  * Decode FSID_PRESENT response
6938  */
6939 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6940                                      struct xdr_stream *xdr,
6941                                      struct nfs4_fsid_present_res *res)
6942 {
6943         struct compound_hdr hdr;
6944         int status;
6945
6946         status = decode_compound_hdr(xdr, &hdr);
6947         if (status)
6948                 goto out;
6949         status = decode_sequence(xdr, &res->seq_res, rqstp);
6950         if (status)
6951                 goto out;
6952         status = decode_putfh(xdr);
6953         if (status)
6954                 goto out;
6955         status = decode_getfh(xdr, res->fh);
6956         if (status)
6957                 goto out;
6958         if (res->renew)
6959                 status = decode_renew(xdr);
6960 out:
6961         return status;
6962 }
6963
6964 #if defined(CONFIG_NFS_V4_1)
6965 /*
6966  * Decode BIND_CONN_TO_SESSION response
6967  */
6968 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6969                                         struct xdr_stream *xdr,
6970                                         void *res)
6971 {
6972         struct compound_hdr hdr;
6973         int status;
6974
6975         status = decode_compound_hdr(xdr, &hdr);
6976         if (!status)
6977                 status = decode_bind_conn_to_session(xdr, res);
6978         return status;
6979 }
6980
6981 /*
6982  * Decode EXCHANGE_ID response
6983  */
6984 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6985                                     struct xdr_stream *xdr,
6986                                     void *res)
6987 {
6988         struct compound_hdr hdr;
6989         int status;
6990
6991         status = decode_compound_hdr(xdr, &hdr);
6992         if (!status)
6993                 status = decode_exchange_id(xdr, res);
6994         return status;
6995 }
6996
6997 /*
6998  * Decode CREATE_SESSION response
6999  */
7000 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7001                                        struct xdr_stream *xdr,
7002                                        struct nfs41_create_session_res *res)
7003 {
7004         struct compound_hdr hdr;
7005         int status;
7006
7007         status = decode_compound_hdr(xdr, &hdr);
7008         if (!status)
7009                 status = decode_create_session(xdr, res);
7010         return status;
7011 }
7012
7013 /*
7014  * Decode DESTROY_SESSION response
7015  */
7016 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7017                                         struct xdr_stream *xdr,
7018                                         void *res)
7019 {
7020         struct compound_hdr hdr;
7021         int status;
7022
7023         status = decode_compound_hdr(xdr, &hdr);
7024         if (!status)
7025                 status = decode_destroy_session(xdr, res);
7026         return status;
7027 }
7028
7029 /*
7030  * Decode DESTROY_CLIENTID response
7031  */
7032 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7033                                         struct xdr_stream *xdr,
7034                                         void *res)
7035 {
7036         struct compound_hdr hdr;
7037         int status;
7038
7039         status = decode_compound_hdr(xdr, &hdr);
7040         if (!status)
7041                 status = decode_destroy_clientid(xdr, res);
7042         return status;
7043 }
7044
7045 /*
7046  * Decode SEQUENCE response
7047  */
7048 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7049                                  struct xdr_stream *xdr,
7050                                  struct nfs4_sequence_res *res)
7051 {
7052         struct compound_hdr hdr;
7053         int status;
7054
7055         status = decode_compound_hdr(xdr, &hdr);
7056         if (!status)
7057                 status = decode_sequence(xdr, res, rqstp);
7058         return status;
7059 }
7060
7061 /*
7062  * Decode GET_LEASE_TIME response
7063  */
7064 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7065                                        struct xdr_stream *xdr,
7066                                        struct nfs4_get_lease_time_res *res)
7067 {
7068         struct compound_hdr hdr;
7069         int status;
7070
7071         status = decode_compound_hdr(xdr, &hdr);
7072         if (!status)
7073                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7074         if (!status)
7075                 status = decode_putrootfh(xdr);
7076         if (!status)
7077                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7078         return status;
7079 }
7080
7081 /*
7082  * Decode RECLAIM_COMPLETE response
7083  */
7084 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7085                                          struct xdr_stream *xdr,
7086                                          struct nfs41_reclaim_complete_res *res)
7087 {
7088         struct compound_hdr hdr;
7089         int status;
7090
7091         status = decode_compound_hdr(xdr, &hdr);
7092         if (!status)
7093                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7094         if (!status)
7095                 status = decode_reclaim_complete(xdr, NULL);
7096         return status;
7097 }
7098
7099 /*
7100  * Decode GETDEVICELIST response
7101  */
7102 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7103                                       struct xdr_stream *xdr,
7104                                       struct nfs4_getdevicelist_res *res)
7105 {
7106         struct compound_hdr hdr;
7107         int status;
7108
7109         dprintk("encoding getdevicelist!\n");
7110
7111         status = decode_compound_hdr(xdr, &hdr);
7112         if (status != 0)
7113                 goto out;
7114         status = decode_sequence(xdr, &res->seq_res, rqstp);
7115         if (status != 0)
7116                 goto out;
7117         status = decode_putfh(xdr);
7118         if (status != 0)
7119                 goto out;
7120         status = decode_getdevicelist(xdr, res->devlist);
7121 out:
7122         return status;
7123 }
7124
7125 /*
7126  * Decode GETDEVINFO response
7127  */
7128 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7129                                       struct xdr_stream *xdr,
7130                                       struct nfs4_getdeviceinfo_res *res)
7131 {
7132         struct compound_hdr hdr;
7133         int status;
7134
7135         status = decode_compound_hdr(xdr, &hdr);
7136         if (status != 0)
7137                 goto out;
7138         status = decode_sequence(xdr, &res->seq_res, rqstp);
7139         if (status != 0)
7140                 goto out;
7141         status = decode_getdeviceinfo(xdr, res->pdev);
7142 out:
7143         return status;
7144 }
7145
7146 /*
7147  * Decode LAYOUTGET response
7148  */
7149 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7150                                   struct xdr_stream *xdr,
7151                                   struct nfs4_layoutget_res *res)
7152 {
7153         struct compound_hdr hdr;
7154         int status;
7155
7156         status = decode_compound_hdr(xdr, &hdr);
7157         if (status)
7158                 goto out;
7159         status = decode_sequence(xdr, &res->seq_res, rqstp);
7160         if (status)
7161                 goto out;
7162         status = decode_putfh(xdr);
7163         if (status)
7164                 goto out;
7165         status = decode_layoutget(xdr, rqstp, res);
7166 out:
7167         return status;
7168 }
7169
7170 /*
7171  * Decode LAYOUTRETURN response
7172  */
7173 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7174                                      struct xdr_stream *xdr,
7175                                      struct nfs4_layoutreturn_res *res)
7176 {
7177         struct compound_hdr hdr;
7178         int status;
7179
7180         status = decode_compound_hdr(xdr, &hdr);
7181         if (status)
7182                 goto out;
7183         status = decode_sequence(xdr, &res->seq_res, rqstp);
7184         if (status)
7185                 goto out;
7186         status = decode_putfh(xdr);
7187         if (status)
7188                 goto out;
7189         status = decode_layoutreturn(xdr, res);
7190 out:
7191         return status;
7192 }
7193
7194 /*
7195  * Decode LAYOUTCOMMIT response
7196  */
7197 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7198                                      struct xdr_stream *xdr,
7199                                      struct nfs4_layoutcommit_res *res)
7200 {
7201         struct compound_hdr hdr;
7202         int status;
7203
7204         status = decode_compound_hdr(xdr, &hdr);
7205         if (status)
7206                 goto out;
7207         status = decode_sequence(xdr, &res->seq_res, rqstp);
7208         if (status)
7209                 goto out;
7210         status = decode_putfh(xdr);
7211         if (status)
7212                 goto out;
7213         status = decode_layoutcommit(xdr, rqstp, res);
7214         if (status)
7215                 goto out;
7216         decode_getfattr(xdr, res->fattr, res->server);
7217 out:
7218         return status;
7219 }
7220
7221 /*
7222  * Decode SECINFO_NO_NAME response
7223  */
7224 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7225                                         struct xdr_stream *xdr,
7226                                         struct nfs4_secinfo_res *res)
7227 {
7228         struct compound_hdr hdr;
7229         int status;
7230
7231         status = decode_compound_hdr(xdr, &hdr);
7232         if (status)
7233                 goto out;
7234         status = decode_sequence(xdr, &res->seq_res, rqstp);
7235         if (status)
7236                 goto out;
7237         status = decode_putrootfh(xdr);
7238         if (status)
7239                 goto out;
7240         status = decode_secinfo_no_name(xdr, res);
7241 out:
7242         return status;
7243 }
7244
7245 /*
7246  * Decode TEST_STATEID response
7247  */
7248 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7249                                      struct xdr_stream *xdr,
7250                                      struct nfs41_test_stateid_res *res)
7251 {
7252         struct compound_hdr hdr;
7253         int status;
7254
7255         status = decode_compound_hdr(xdr, &hdr);
7256         if (status)
7257                 goto out;
7258         status = decode_sequence(xdr, &res->seq_res, rqstp);
7259         if (status)
7260                 goto out;
7261         status = decode_test_stateid(xdr, res);
7262 out:
7263         return status;
7264 }
7265
7266 /*
7267  * Decode FREE_STATEID response
7268  */
7269 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7270                                      struct xdr_stream *xdr,
7271                                      struct nfs41_free_stateid_res *res)
7272 {
7273         struct compound_hdr hdr;
7274         int status;
7275
7276         status = decode_compound_hdr(xdr, &hdr);
7277         if (status)
7278                 goto out;
7279         status = decode_sequence(xdr, &res->seq_res, rqstp);
7280         if (status)
7281                 goto out;
7282         status = decode_free_stateid(xdr, res);
7283 out:
7284         return status;
7285 }
7286 #endif /* CONFIG_NFS_V4_1 */
7287
7288 /**
7289  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7290  *                      the local page cache.
7291  * @xdr: XDR stream where entry resides
7292  * @entry: buffer to fill in with entry data
7293  * @plus: boolean indicating whether this should be a readdirplus entry
7294  *
7295  * Returns zero if successful, otherwise a negative errno value is
7296  * returned.
7297  *
7298  * This function is not invoked during READDIR reply decoding, but
7299  * rather whenever an application invokes the getdents(2) system call
7300  * on a directory already in our cache.
7301  */
7302 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7303                        int plus)
7304 {
7305         unsigned int savep;
7306         uint32_t bitmap[3] = {0};
7307         uint32_t len;
7308         __be32 *p = xdr_inline_decode(xdr, 4);
7309         if (unlikely(!p))
7310                 goto out_overflow;
7311         if (*p == xdr_zero) {
7312                 p = xdr_inline_decode(xdr, 4);
7313                 if (unlikely(!p))
7314                         goto out_overflow;
7315                 if (*p == xdr_zero)
7316                         return -EAGAIN;
7317                 entry->eof = 1;
7318                 return -EBADCOOKIE;
7319         }
7320
7321         p = xdr_inline_decode(xdr, 12);
7322         if (unlikely(!p))
7323                 goto out_overflow;
7324         entry->prev_cookie = entry->cookie;
7325         p = xdr_decode_hyper(p, &entry->cookie);
7326         entry->len = be32_to_cpup(p);
7327
7328         p = xdr_inline_decode(xdr, entry->len);
7329         if (unlikely(!p))
7330                 goto out_overflow;
7331         entry->name = (const char *) p;
7332
7333         /*
7334          * In case the server doesn't return an inode number,
7335          * we fake one here.  (We don't use inode number 0,
7336          * since glibc seems to choke on it...)
7337          */
7338         entry->ino = 1;
7339         entry->fattr->valid = 0;
7340
7341         if (decode_attr_bitmap(xdr, bitmap) < 0)
7342                 goto out_overflow;
7343
7344         if (decode_attr_length(xdr, &len, &savep) < 0)
7345                 goto out_overflow;
7346
7347         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7348                         NULL, entry->label, entry->server) < 0)
7349                 goto out_overflow;
7350         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7351                 entry->ino = entry->fattr->mounted_on_fileid;
7352         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7353                 entry->ino = entry->fattr->fileid;
7354
7355         entry->d_type = DT_UNKNOWN;
7356         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7357                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7358
7359         return 0;
7360
7361 out_overflow:
7362         print_overflow_msg(__func__, xdr);
7363         return -EAGAIN;
7364 }
7365
7366 /*
7367  * We need to translate between nfs status return values and
7368  * the local errno values which may not be the same.
7369  */
7370 static struct {
7371         int stat;
7372         int errno;
7373 } nfs_errtbl[] = {
7374         { NFS4_OK,              0               },
7375         { NFS4ERR_PERM,         -EPERM          },
7376         { NFS4ERR_NOENT,        -ENOENT         },
7377         { NFS4ERR_IO,           -errno_NFSERR_IO},
7378         { NFS4ERR_NXIO,         -ENXIO          },
7379         { NFS4ERR_ACCESS,       -EACCES         },
7380         { NFS4ERR_EXIST,        -EEXIST         },
7381         { NFS4ERR_XDEV,         -EXDEV          },
7382         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7383         { NFS4ERR_ISDIR,        -EISDIR         },
7384         { NFS4ERR_INVAL,        -EINVAL         },
7385         { NFS4ERR_FBIG,         -EFBIG          },
7386         { NFS4ERR_NOSPC,        -ENOSPC         },
7387         { NFS4ERR_ROFS,         -EROFS          },
7388         { NFS4ERR_MLINK,        -EMLINK         },
7389         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7390         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7391         { NFS4ERR_DQUOT,        -EDQUOT         },
7392         { NFS4ERR_STALE,        -ESTALE         },
7393         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7394         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7395         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7396         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7397         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7398         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7399         { NFS4ERR_LOCKED,       -EAGAIN         },
7400         { NFS4ERR_SYMLINK,      -ELOOP          },
7401         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7402         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7403         { -1,                   -EIO            }
7404 };
7405
7406 /*
7407  * Convert an NFS error code to a local one.
7408  * This one is used jointly by NFSv2 and NFSv3.
7409  */
7410 static int
7411 nfs4_stat_to_errno(int stat)
7412 {
7413         int i;
7414         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7415                 if (nfs_errtbl[i].stat == stat)
7416                         return nfs_errtbl[i].errno;
7417         }
7418         if (stat <= 10000 || stat > 10100) {
7419                 /* The server is looney tunes. */
7420                 return -EREMOTEIO;
7421         }
7422         /* If we cannot translate the error, the recovery routines should
7423          * handle it.
7424          * Note: remaining NFSv4 error codes have values > 10000, so should
7425          * not conflict with native Linux error codes.
7426          */
7427         return -stat;
7428 }
7429
7430 #define PROC(proc, argtype, restype)                            \
7431 [NFSPROC4_CLNT_##proc] = {                                      \
7432         .p_proc   = NFSPROC4_COMPOUND,                          \
7433         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7434         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7435         .p_arglen = NFS4_##argtype##_sz,                        \
7436         .p_replen = NFS4_##restype##_sz,                        \
7437         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7438         .p_name   = #proc,                                      \
7439 }
7440
7441 struct rpc_procinfo     nfs4_procedures[] = {
7442         PROC(READ,              enc_read,               dec_read),
7443         PROC(WRITE,             enc_write,              dec_write),
7444         PROC(COMMIT,            enc_commit,             dec_commit),
7445         PROC(OPEN,              enc_open,               dec_open),
7446         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7447         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7448         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7449         PROC(CLOSE,             enc_close,              dec_close),
7450         PROC(SETATTR,           enc_setattr,            dec_setattr),
7451         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7452         PROC(RENEW,             enc_renew,              dec_renew),
7453         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7454         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7455         PROC(LOCK,              enc_lock,               dec_lock),
7456         PROC(LOCKT,             enc_lockt,              dec_lockt),
7457         PROC(LOCKU,             enc_locku,              dec_locku),
7458         PROC(ACCESS,            enc_access,             dec_access),
7459         PROC(GETATTR,           enc_getattr,            dec_getattr),
7460         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7461         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7462         PROC(REMOVE,            enc_remove,             dec_remove),
7463         PROC(RENAME,            enc_rename,             dec_rename),
7464         PROC(LINK,              enc_link,               dec_link),
7465         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7466         PROC(CREATE,            enc_create,             dec_create),
7467         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7468         PROC(STATFS,            enc_statfs,             dec_statfs),
7469         PROC(READLINK,          enc_readlink,           dec_readlink),
7470         PROC(READDIR,           enc_readdir,            dec_readdir),
7471         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7472         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7473         PROC(GETACL,            enc_getacl,             dec_getacl),
7474         PROC(SETACL,            enc_setacl,             dec_setacl),
7475         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7476         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7477         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7478         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7479 #if defined(CONFIG_NFS_V4_1)
7480         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7481         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7482         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7483         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7484         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7485         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7486         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7487         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7488         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7489         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7490         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7491         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7492         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7493         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7494         PROC(BIND_CONN_TO_SESSION,
7495                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7496         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7497 #endif /* CONFIG_NFS_V4_1 */
7498 };
7499
7500 const struct rpc_version nfs_version4 = {
7501         .number                 = 4,
7502         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7503         .procs                  = nfs4_procedures
7504 };
7505
7506 /*
7507  * Local variables:
7508  *  c-basic-offset: 8
7509  * End:
7510  */