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                                 nfs4_label_maxsz + nfs4_fattr_maxsz)
 208 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 209 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 210 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 211                                  encode_stateid_maxsz + 4)
 212 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 213                                  2 + decode_verifier_maxsz)
 214 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 215 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 216                                  decode_verifier_maxsz)
 217 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 218                                 nfs4_name_maxsz)
 219 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 220                                  decode_change_info_maxsz)
 221 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 222                                 2 * nfs4_name_maxsz)
 223 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 224                                  decode_change_info_maxsz + \
 225                                  decode_change_info_maxsz)
 226 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 227                                 nfs4_name_maxsz)
 228 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 229 #define encode_lockowner_maxsz  (7)
 230 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 231                                  7 + \
 232                                  1 + encode_stateid_maxsz + 1 + \
 233                                  encode_lockowner_maxsz)
 234 #define decode_lock_denied_maxsz \
 235                                 (8 + decode_lockowner_maxsz)
 236 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 237                                  decode_lock_denied_maxsz)
 238 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 239                                 encode_lockowner_maxsz)
 240 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 241                                  decode_lock_denied_maxsz)
 242 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 243                                  encode_stateid_maxsz + \
 244                                  4)
 245 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 246                                  decode_stateid_maxsz)
 247 #define encode_release_lockowner_maxsz \
 248                                 (op_encode_hdr_maxsz + \
 249                                  encode_lockowner_maxsz)
 250 #define decode_release_lockowner_maxsz \
 251                                 (op_decode_hdr_maxsz)
 252 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 253 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 254 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 255                                 1 + nfs4_name_maxsz + \
 256                                 1 + \
 257                                 nfs4_fattr_maxsz)
 258 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 259 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 260                                 1 + 2 + nfs4_name_maxsz + \
 261                                 encode_attrs_maxsz)
 262 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 263                                 decode_change_info_maxsz + \
 264                                 nfs4_fattr_bitmap_maxsz)
 265 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 266 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 267 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 268 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 269 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 270 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 271                                  nfs4_fattr_bitmap_maxsz + 1)
 272 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 273                                  encode_stateid_maxsz + 3)
 274 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 275 #define encode_fs_locations_maxsz \
 276                                 (encode_getattr_maxsz)
 277 #define decode_fs_locations_maxsz \
 278                                 (0)
 279 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 280 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 281
 282 #if defined(CONFIG_NFS_V4_1)
 283 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 284 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 285                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 286
 287 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 288                                 encode_verifier_maxsz + \
 289                                 1 /* co_ownerid.len */ + \
 290                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 291                                 1 /* flags */ + \
 292                                 1 /* spa_how */ + \
 293                                 /* max is SP4_MACH_CRED (for now) */ + \
 294                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 295                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 296                                 1 /* implementation id array of size 1 */ + \
 297                                 1 /* nii_domain */ + \
 298                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 299                                 1 /* nii_name */ + \
 300                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 301                                 3 /* nii_date */)
 302 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 303                                 2 /* eir_clientid */ + \
 304                                 1 /* eir_sequenceid */ + \
 305                                 1 /* eir_flags */ + \
 306                                 1 /* spr_how */ + \
 307                                   /* max is SP4_MACH_CRED (for now) */ + \
 308                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 309                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 310                                 2 /* eir_server_owner.so_minor_id */ + \
 311                                 /* eir_server_owner.so_major_id<> */ \
 312                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 313                                 /* eir_server_scope<> */ \
 314                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 315                                 1 /* eir_server_impl_id array length */ + \
 316                                 1 /* nii_domain */ + \
 317                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 318                                 1 /* nii_name */ + \
 319                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 320                                 3 /* nii_date */)
 321 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 322 #define decode_channel_attrs_maxsz  (6 + \
 323                                      1 /* ca_rdma_ird.len */ + \
 324                                      1 /* ca_rdma_ird */)
 325 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 326                                      2 /* csa_clientid */ + \
 327                                      1 /* csa_sequence */ + \
 328                                      1 /* csa_flags */ + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      encode_channel_attrs_maxsz + \
 331                                      1 /* csa_cb_program */ + \
 332                                      1 /* csa_sec_parms.len (1) */ + \
 333                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 334                                      1 /* stamp */ + \
 335                                      1 /* machinename.len */ + \
 336                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 337                                      1 /* uid */ + \
 338                                      1 /* gid */ + \
 339                                      1 /* gids.len (0) */)
 340 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 341                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 342                                      1 /* csr_sequence */ + \
 343                                      1 /* csr_flags */ + \
 344                                      decode_channel_attrs_maxsz + \
 345                                      decode_channel_attrs_maxsz)
 346 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 347                                      /* bctsa_sessid */ \
 348                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 349                                      1 /* bctsa_dir */ + \
 350                                      1 /* bctsa_use_conn_in_rdma_mode */)
 351 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 352                                      /* bctsr_sessid */ \
 353                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 354                                      1 /* bctsr_dir */ + \
 355                                      1 /* bctsr_use_conn_in_rdma_mode */)
 356 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 357 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 358 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 359 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 360 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 361                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 362 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 363                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 364 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 365 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 367                                 encode_verifier_maxsz)
 368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 369                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 370                                 decode_verifier_maxsz \
 371                                   /* verifier4 gdlr_verifier */ + \
 372                                 1 /* gdlr_deviceid_list count */ + \
 373                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 374                                             NFS4_DEVICEID4_SIZE) \
 375                                   /* gdlr_deviceid_list */ + \
 376                                 1 /* bool gdlr_eof */)
 377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 378                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 380                                 1 /* layout type */ + \
 381                                 1 /* opaque devaddr4 length */ + \
 382                                   /* devaddr4 payload is read into page */ \
 383                                 1 /* notification bitmap length */ + \
 384                                 1 /* notification bitmap */)
 385 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 386                                 encode_stateid_maxsz)
 387 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 388                                 decode_stateid_maxsz + \
 389                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 391                                 2 /* offset */ + \
 392                                 2 /* length */ + \
 393                                 1 /* reclaim */ + \
 394                                 encode_stateid_maxsz + \
 395                                 1 /* new offset (true) */ + \
 396                                 2 /* last byte written */ + \
 397                                 1 /* nt_timechanged (false) */ + \
 398                                 1 /* layoutupdate4 layout type */ + \
 399                                 1 /* NULL filelayout layoutupdate4 payload */)
 400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                 encode_stateid_maxsz + \
 403                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 405                                 1 + decode_stateid_maxsz)
 406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 408 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 409                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 410 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 411 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 412                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 413 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 414 #else /* CONFIG_NFS_V4_1 */
 415 #define encode_sequence_maxsz   0
 416 #define decode_sequence_maxsz   0
 417 #endif /* CONFIG_NFS_V4_1 */
 418
 419 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 420 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 421 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 422                                 encode_sequence_maxsz + \
 423                                 encode_putfh_maxsz + \
 424                                 encode_read_maxsz)
 425 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 426                                 decode_sequence_maxsz + \
 427                                 decode_putfh_maxsz + \
 428                                 decode_read_maxsz)
 429 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 430                                 encode_sequence_maxsz + \
 431                                 encode_putfh_maxsz + \
 432                                 encode_readlink_maxsz)
 433 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 434                                 decode_sequence_maxsz + \
 435                                 decode_putfh_maxsz + \
 436                                 decode_readlink_maxsz)
 437 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 438                                 encode_sequence_maxsz + \
 439                                 encode_putfh_maxsz + \
 440                                 encode_readdir_maxsz)
 441 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 442                                 decode_sequence_maxsz + \
 443                                 decode_putfh_maxsz + \
 444                                 decode_readdir_maxsz)
 445 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 446                                 encode_sequence_maxsz + \
 447                                 encode_putfh_maxsz + \
 448                                 encode_write_maxsz + \
 449                                 encode_getattr_maxsz)
 450 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 451                                 decode_sequence_maxsz + \
 452                                 decode_putfh_maxsz + \
 453                                 decode_write_maxsz + \
 454                                 decode_getattr_maxsz)
 455 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_commit_maxsz)
 459 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 460                                 decode_sequence_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_commit_maxsz)
 463 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_open_maxsz + \
 467                                 encode_access_maxsz + \
 468                                 encode_getfh_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_open_maxsz + \
 474                                 decode_access_maxsz + \
 475                                 decode_getfh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_open_confirm_sz \
 478                                 (compound_encode_hdr_maxsz + \
 479                                  encode_putfh_maxsz + \
 480                                  encode_open_confirm_maxsz)
 481 #define NFS4_dec_open_confirm_sz \
 482                                 (compound_decode_hdr_maxsz + \
 483                                  decode_putfh_maxsz + \
 484                                  decode_open_confirm_maxsz)
 485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 486                                         encode_sequence_maxsz + \
 487                                         encode_putfh_maxsz + \
 488                                         encode_open_maxsz + \
 489                                         encode_access_maxsz + \
 490                                         encode_getattr_maxsz)
 491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 492                                         decode_sequence_maxsz + \
 493                                         decode_putfh_maxsz + \
 494                                         decode_open_maxsz + \
 495                                         decode_access_maxsz + \
 496                                         decode_getattr_maxsz)
 497 #define NFS4_enc_open_downgrade_sz \
 498                                 (compound_encode_hdr_maxsz + \
 499                                  encode_sequence_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_open_downgrade_maxsz + \
 502                                  encode_getattr_maxsz)
 503 #define NFS4_dec_open_downgrade_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_sequence_maxsz + \
 506                                  decode_putfh_maxsz + \
 507                                  decode_open_downgrade_maxsz + \
 508                                  decode_getattr_maxsz)
 509 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 510                                  encode_sequence_maxsz + \
 511                                  encode_putfh_maxsz + \
 512                                  encode_close_maxsz + \
 513                                  encode_getattr_maxsz)
 514 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 515                                  decode_sequence_maxsz + \
 516                                  decode_putfh_maxsz + \
 517                                  decode_close_maxsz + \
 518                                  decode_getattr_maxsz)
 519 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 520                                  encode_sequence_maxsz + \
 521                                  encode_putfh_maxsz + \
 522                                  encode_setattr_maxsz + \
 523                                  encode_getattr_maxsz)
 524 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 525                                  decode_sequence_maxsz + \
 526                                  decode_putfh_maxsz + \
 527                                  decode_setattr_maxsz + \
 528                                  decode_getattr_maxsz)
 529 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 530                                 encode_sequence_maxsz + \
 531                                 encode_putfh_maxsz + \
 532                                 encode_fsinfo_maxsz)
 533 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_fsinfo_maxsz)
 537 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 538                                 encode_renew_maxsz)
 539 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 540                                 decode_renew_maxsz)
 541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 542                                 encode_setclientid_maxsz)
 543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 544                                 decode_setclientid_maxsz)
 545 #define NFS4_enc_setclientid_confirm_sz \
 546                                 (compound_encode_hdr_maxsz + \
 547                                 encode_setclientid_confirm_maxsz)
 548 #define NFS4_dec_setclientid_confirm_sz \
 549                                 (compound_decode_hdr_maxsz + \
 550                                 decode_setclientid_confirm_maxsz)
 551 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 552                                 encode_sequence_maxsz + \
 553                                 encode_putfh_maxsz + \
 554                                 encode_lock_maxsz)
 555 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 556                                 decode_sequence_maxsz + \
 557                                 decode_putfh_maxsz + \
 558                                 decode_lock_maxsz)
 559 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 560                                 encode_sequence_maxsz + \
 561                                 encode_putfh_maxsz + \
 562                                 encode_lockt_maxsz)
 563 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 564                                  decode_sequence_maxsz + \
 565                                  decode_putfh_maxsz + \
 566                                  decode_lockt_maxsz)
 567 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_locku_maxsz)
 571 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 572                                 decode_sequence_maxsz + \
 573                                 decode_putfh_maxsz + \
 574                                 decode_locku_maxsz)
 575 #define NFS4_enc_release_lockowner_sz \
 576                                 (compound_encode_hdr_maxsz + \
 577                                  encode_lockowner_maxsz)
 578 #define NFS4_dec_release_lockowner_sz \
 579                                 (compound_decode_hdr_maxsz + \
 580                                  decode_lockowner_maxsz)
 581 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_access_maxsz + \
 585                                 encode_getattr_maxsz)
 586 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 587                                 decode_sequence_maxsz + \
 588                                 decode_putfh_maxsz + \
 589                                 decode_access_maxsz + \
 590                                 decode_getattr_maxsz)
 591 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_getattr_maxsz + \
 595                                 encode_renew_maxsz)
 596 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 597                                 decode_sequence_maxsz + \
 598                                 decode_putfh_maxsz + \
 599                                 decode_getattr_maxsz + \
 600                                 decode_renew_maxsz)
 601 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 602                                 encode_sequence_maxsz + \
 603                                 encode_putfh_maxsz + \
 604                                 encode_lookup_maxsz + \
 605                                 encode_getattr_maxsz + \
 606                                 encode_getfh_maxsz)
 607 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 608                                 decode_sequence_maxsz + \
 609                                 decode_putfh_maxsz + \
 610                                 decode_lookup_maxsz + \
 611                                 decode_getattr_maxsz + \
 612                                 decode_getfh_maxsz)
 613 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 614                                 encode_sequence_maxsz + \
 615                                 encode_putrootfh_maxsz + \
 616                                 encode_getattr_maxsz + \
 617                                 encode_getfh_maxsz)
 618 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 619                                 decode_sequence_maxsz + \
 620                                 decode_putrootfh_maxsz + \
 621                                 decode_getattr_maxsz + \
 622                                 decode_getfh_maxsz)
 623 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 624                                 encode_sequence_maxsz + \
 625                                 encode_putfh_maxsz + \
 626                                 encode_remove_maxsz)
 627 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 628                                 decode_sequence_maxsz + \
 629                                 decode_putfh_maxsz + \
 630                                 decode_remove_maxsz)
 631 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_savefh_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_rename_maxsz)
 637 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 638                                 decode_sequence_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_savefh_maxsz + \
 641                                 decode_putfh_maxsz + \
 642                                 decode_rename_maxsz)
 643 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 644                                 encode_sequence_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_savefh_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_link_maxsz + \
 649                                 encode_restorefh_maxsz + \
 650                                 encode_getattr_maxsz)
 651 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 652                                 decode_sequence_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_savefh_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_link_maxsz + \
 657                                 decode_restorefh_maxsz + \
 658                                 decode_getattr_maxsz)
 659 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_symlink_maxsz + \
 663                                 encode_getattr_maxsz + \
 664                                 encode_getfh_maxsz)
 665 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_symlink_maxsz + \
 669                                 decode_getattr_maxsz + \
 670                                 decode_getfh_maxsz)
 671 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_create_maxsz + \
 675                                 encode_getfh_maxsz + \
 676                                 encode_getattr_maxsz)
 677 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 678                                 decode_sequence_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_create_maxsz + \
 681                                 decode_getfh_maxsz + \
 682                                 decode_getattr_maxsz)
 683 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_getattr_maxsz)
 687 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_getattr_maxsz)
 691 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 692                                 encode_sequence_maxsz + \
 693                                 encode_putfh_maxsz + \
 694                                 encode_statfs_maxsz)
 695 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 696                                 decode_sequence_maxsz + \
 697                                 decode_putfh_maxsz + \
 698                                 decode_statfs_maxsz)
 699 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 700                                 encode_sequence_maxsz + \
 701                                 encode_putfh_maxsz + \
 702                                 encode_getattr_maxsz)
 703 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_getattr_maxsz)
 707 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 708                                 encode_sequence_maxsz + \
 709                                 encode_putfh_maxsz + \
 710                                 encode_delegreturn_maxsz + \
 711                                 encode_getattr_maxsz)
 712 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 713                                 decode_sequence_maxsz + \
 714                                 decode_delegreturn_maxsz + \
 715                                 decode_getattr_maxsz)
 716 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 717                                 encode_sequence_maxsz + \
 718                                 encode_putfh_maxsz + \
 719                                 encode_getacl_maxsz)
 720 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 721                                 decode_sequence_maxsz + \
 722                                 decode_putfh_maxsz + \
 723                                 decode_getacl_maxsz)
 724 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 725                                 encode_sequence_maxsz + \
 726                                 encode_putfh_maxsz + \
 727                                 encode_setacl_maxsz)
 728 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 729                                 decode_sequence_maxsz + \
 730                                 decode_putfh_maxsz + \
 731                                 decode_setacl_maxsz)
 732 #define NFS4_enc_fs_locations_sz \
 733                                 (compound_encode_hdr_maxsz + \
 734                                  encode_sequence_maxsz + \
 735                                  encode_putfh_maxsz + \
 736                                  encode_lookup_maxsz + \
 737                                  encode_fs_locations_maxsz + \
 738                                  encode_renew_maxsz)
 739 #define NFS4_dec_fs_locations_sz \
 740                                 (compound_decode_hdr_maxsz + \
 741                                  decode_sequence_maxsz + \
 742                                  decode_putfh_maxsz + \
 743                                  decode_lookup_maxsz + \
 744                                  decode_fs_locations_maxsz + \
 745                                  decode_renew_maxsz)
 746 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 747                                 encode_sequence_maxsz + \
 748                                 encode_putfh_maxsz + \
 749                                 encode_secinfo_maxsz)
 750 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 751                                 decode_sequence_maxsz + \
 752                                 decode_putfh_maxsz + \
 753                                 decode_secinfo_maxsz)
 754 #define NFS4_enc_fsid_present_sz \
 755                                 (compound_encode_hdr_maxsz + \
 756                                  encode_sequence_maxsz + \
 757                                  encode_putfh_maxsz + \
 758                                  encode_getfh_maxsz + \
 759                                  encode_renew_maxsz)
 760 #define NFS4_dec_fsid_present_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  decode_sequence_maxsz + \
 763                                  decode_putfh_maxsz + \
 764                                  decode_getfh_maxsz + \
 765                                  decode_renew_maxsz)
 766 #if defined(CONFIG_NFS_V4_1)
 767 #define NFS4_enc_bind_conn_to_session_sz \
 768                                 (compound_encode_hdr_maxsz + \
 769                                  encode_bind_conn_to_session_maxsz)
 770 #define NFS4_dec_bind_conn_to_session_sz \
 771                                 (compound_decode_hdr_maxsz + \
 772                                  decode_bind_conn_to_session_maxsz)
 773 #define NFS4_enc_exchange_id_sz \
 774                                 (compound_encode_hdr_maxsz + \
 775                                  encode_exchange_id_maxsz)
 776 #define NFS4_dec_exchange_id_sz \
 777                                 (compound_decode_hdr_maxsz + \
 778                                  decode_exchange_id_maxsz)
 779 #define NFS4_enc_create_session_sz \
 780                                 (compound_encode_hdr_maxsz + \
 781                                  encode_create_session_maxsz)
 782 #define NFS4_dec_create_session_sz \
 783                                 (compound_decode_hdr_maxsz + \
 784                                  decode_create_session_maxsz)
 785 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 786                                          encode_destroy_session_maxsz)
 787 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 788                                          decode_destroy_session_maxsz)
 789 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 790                                          encode_destroy_clientid_maxsz)
 791 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 792                                          decode_destroy_clientid_maxsz)
 793 #define NFS4_enc_sequence_sz \
 794                                 (compound_decode_hdr_maxsz + \
 795                                  encode_sequence_maxsz)
 796 #define NFS4_dec_sequence_sz \
 797                                 (compound_decode_hdr_maxsz + \
 798                                  decode_sequence_maxsz)
 799 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 800                                          encode_sequence_maxsz + \
 801                                          encode_putrootfh_maxsz + \
 802                                          encode_fsinfo_maxsz)
 803 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 804                                          decode_sequence_maxsz + \
 805                                          decode_putrootfh_maxsz + \
 806                                          decode_fsinfo_maxsz)
 807 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 808                                          encode_sequence_maxsz + \
 809                                          encode_reclaim_complete_maxsz)
 810 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 811                                          decode_sequence_maxsz + \
 812                                          decode_reclaim_complete_maxsz)
 813 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 814                                 encode_sequence_maxsz + \
 815                                 encode_putfh_maxsz + \
 816                                 encode_getdevicelist_maxsz)
 817 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 818                                 decode_sequence_maxsz + \
 819                                 decode_putfh_maxsz + \
 820                                 decode_getdevicelist_maxsz)
 821 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 822                                 encode_sequence_maxsz +\
 823                                 encode_getdeviceinfo_maxsz)
 824 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 825                                 decode_sequence_maxsz + \
 826                                 decode_getdeviceinfo_maxsz)
 827 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 828                                 encode_sequence_maxsz + \
 829                                 encode_putfh_maxsz +        \
 830                                 encode_layoutget_maxsz)
 831 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 832                                 decode_sequence_maxsz + \
 833                                 decode_putfh_maxsz +        \
 834                                 decode_layoutget_maxsz)
 835 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 836                                 encode_sequence_maxsz +\
 837                                 encode_putfh_maxsz + \
 838                                 encode_layoutcommit_maxsz + \
 839                                 encode_getattr_maxsz)
 840 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 841                                 decode_sequence_maxsz + \
 842                                 decode_putfh_maxsz + \
 843                                 decode_layoutcommit_maxsz + \
 844                                 decode_getattr_maxsz)
 845 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 846                                 encode_sequence_maxsz + \
 847                                 encode_putfh_maxsz + \
 848                                 encode_layoutreturn_maxsz)
 849 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 850                                 decode_sequence_maxsz + \
 851                                 decode_putfh_maxsz + \
 852                                 decode_layoutreturn_maxsz)
 853 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 854                                         encode_sequence_maxsz + \
 855                                         encode_putrootfh_maxsz +\
 856                                         encode_secinfo_no_name_maxsz)
 857 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 858                                         decode_sequence_maxsz + \
 859                                         decode_putrootfh_maxsz + \
 860                                         decode_secinfo_no_name_maxsz)
 861 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 862                                          encode_sequence_maxsz + \
 863                                          encode_test_stateid_maxsz)
 864 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 865                                          decode_sequence_maxsz + \
 866                                          decode_test_stateid_maxsz)
 867 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 868                                          encode_sequence_maxsz + \
 869                                          encode_free_stateid_maxsz)
 870 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 871                                          decode_sequence_maxsz + \
 872                                          decode_free_stateid_maxsz)
 873
 874 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 875                                       compound_encode_hdr_maxsz +
 876                                       encode_sequence_maxsz +
 877                                       encode_putfh_maxsz +
 878                                       encode_getattr_maxsz) *
 879                                      XDR_UNIT);
 880
 881 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 882                                      compound_decode_hdr_maxsz +
 883                                      decode_sequence_maxsz +
 884                                      decode_putfh_maxsz) *
 885                                     XDR_UNIT);
 886
 887 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 888                                            compound_decode_hdr_maxsz +
 889                                            decode_sequence_maxsz) *
 890                                           XDR_UNIT);
 891 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 892 #endif /* CONFIG_NFS_V4_1 */
 893
 894 static const umode_t nfs_type2fmt[] = {
 895         [NF4BAD] = 0,
 896         [NF4REG] = S_IFREG,
 897         [NF4DIR] = S_IFDIR,
 898         [NF4BLK] = S_IFBLK,
 899         [NF4CHR] = S_IFCHR,
 900         [NF4LNK] = S_IFLNK,
 901         [NF4SOCK] = S_IFSOCK,
 902         [NF4FIFO] = S_IFIFO,
 903         [NF4ATTRDIR] = 0,
 904         [NF4NAMEDATTR] = 0,
 905 };
 906
 907 struct compound_hdr {
 908         int32_t         status;
 909         uint32_t        nops;
 910         __be32 *        nops_p;
 911         uint32_t        taglen;
 912         char *          tag;
 913         uint32_t        replen;         /* expected reply words */
 914         u32             minorversion;
 915 };
 916
 917 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 918 {
 919         __be32 *p = xdr_reserve_space(xdr, nbytes);
 920         BUG_ON(!p);
 921         return p;
 922 }
 923
 924 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 925 {
 926         __be32 *p;
 927
 928         p = xdr_reserve_space(xdr, len);
 929         xdr_encode_opaque_fixed(p, buf, len);
 930 }
 931
 932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 933 {
 934         __be32 *p;
 935
 936         p = reserve_space(xdr, 4 + len);
 937         xdr_encode_opaque(p, str, len);
 938 }
 939
 940 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 941 {
 942         __be32 *p;
 943
 944         p = reserve_space(xdr, 4);
 945         *p = cpu_to_be32(n);
 946 }
 947
 948 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 949 {
 950         __be32 *p;
 951
 952         p = reserve_space(xdr, 8);
 953         xdr_encode_hyper(p, n);
 954 }
 955
 956 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 957                 const struct nfs_seqid *seqid)
 958 {
 959         encode_uint32(xdr, seqid->sequence->counter);
 960 }
 961
 962 static void encode_compound_hdr(struct xdr_stream *xdr,
 963                                 struct rpc_rqst *req,
 964                                 struct compound_hdr *hdr)
 965 {
 966         __be32 *p;
 967         struct rpc_auth *auth = req->rq_cred->cr_auth;
 968
 969         /* initialize running count of expected bytes in reply.
 970          * NOTE: the replied tag SHOULD be the same is the one sent,
 971          * but this is not required as a MUST for the server to do so. */
 972         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 973
 974         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 975         encode_string(xdr, hdr->taglen, hdr->tag);
 976         p = reserve_space(xdr, 8);
 977         *p++ = cpu_to_be32(hdr->minorversion);
 978         hdr->nops_p = p;
 979         *p = cpu_to_be32(hdr->nops);
 980 }
 981
 982 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 983                 uint32_t replen,
 984                 struct compound_hdr *hdr)
 985 {
 986         encode_uint32(xdr, op);
 987         hdr->nops++;
 988         hdr->replen += replen;
 989 }
 990
 991 static void encode_nops(struct compound_hdr *hdr)
 992 {
 993         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 994         *hdr->nops_p = htonl(hdr->nops);
 995 }
 996
 997 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 998 {
 999         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1000 }
1001
1002 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1003 {
1004         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1005 }
1006
1007 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1008                                 const struct nfs4_label *label,
1009                                 const struct nfs_server *server)
1010 {
1011         char owner_name[IDMAP_NAMESZ];
1012         char owner_group[IDMAP_NAMESZ];
1013         int owner_namelen = 0;
1014         int owner_grouplen = 0;
1015         __be32 *p;
1016         unsigned i;
1017         uint32_t len = 0;
1018         uint32_t bmval_len;
1019         uint32_t bmval[3] = { 0 };
1020
1021         /*
1022          * We reserve enough space to write the entire attribute buffer at once.
1023          * In the worst-case, this would be
1024          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1025          * = 40 bytes, plus any contribution from variable-length fields
1026          *            such as owner/group.
1027          */
1028         if (iap->ia_valid & ATTR_SIZE) {
1029                 bmval[0] |= FATTR4_WORD0_SIZE;
1030                 len += 8;
1031         }
1032         if (iap->ia_valid & ATTR_MODE) {
1033                 bmval[1] |= FATTR4_WORD1_MODE;
1034                 len += 4;
1035         }
1036         if (iap->ia_valid & ATTR_UID) {
1037                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1038                 if (owner_namelen < 0) {
1039                         dprintk("nfs: couldn't resolve uid %d to string\n",
1040                                         from_kuid(&init_user_ns, iap->ia_uid));
1041                         /* XXX */
1042                         strcpy(owner_name, "nobody");
1043                         owner_namelen = sizeof("nobody") - 1;
1044                         /* goto out; */
1045                 }
1046                 bmval[1] |= FATTR4_WORD1_OWNER;
1047                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1048         }
1049         if (iap->ia_valid & ATTR_GID) {
1050                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1051                 if (owner_grouplen < 0) {
1052                         dprintk("nfs: couldn't resolve gid %d to string\n",
1053                                         from_kgid(&init_user_ns, iap->ia_gid));
1054                         strcpy(owner_group, "nobody");
1055                         owner_grouplen = sizeof("nobody") - 1;
1056                         /* goto out; */
1057                 }
1058                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1059                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1060         }
1061         if (iap->ia_valid & ATTR_ATIME_SET) {
1062                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 len += 16;
1064         } else if (iap->ia_valid & ATTR_ATIME) {
1065                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1066                 len += 4;
1067         }
1068         if (iap->ia_valid & ATTR_MTIME_SET) {
1069                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070                 len += 16;
1071         } else if (iap->ia_valid & ATTR_MTIME) {
1072                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1073                 len += 4;
1074         }
1075         if (label) {
1076                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1077                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1078         }
1079
1080         if (bmval[2] != 0)
1081                 bmval_len = 3;
1082         else if (bmval[1] != 0)
1083                 bmval_len = 2;
1084         else
1085                 bmval_len = 1;
1086
1087         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1088
1089         *p++ = cpu_to_be32(bmval_len);
1090         for (i = 0; i < bmval_len; i++)
1091                 *p++ = cpu_to_be32(bmval[i]);
1092         *p++ = cpu_to_be32(len);
1093
1094         if (bmval[0] & FATTR4_WORD0_SIZE)
1095                 p = xdr_encode_hyper(p, iap->ia_size);
1096         if (bmval[1] & FATTR4_WORD1_MODE)
1097                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1098         if (bmval[1] & FATTR4_WORD1_OWNER)
1099                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1100         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1101                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1102         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1103                 if (iap->ia_valid & ATTR_ATIME_SET) {
1104                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1105                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1106                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1107                 } else
1108                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1109         }
1110         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1111                 if (iap->ia_valid & ATTR_MTIME_SET) {
1112                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1114                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1115                 } else
1116                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117         }
1118         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1119                 *p++ = cpu_to_be32(label->lfs);
1120                 *p++ = cpu_to_be32(label->pi);
1121                 *p++ = cpu_to_be32(label->len);
1122                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1123         }
1124
1125 /* out: */
1126 }
1127
1128 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1129 {
1130         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1131         encode_uint32(xdr, access);
1132 }
1133
1134 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1135 {
1136         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1137         encode_nfs4_seqid(xdr, arg->seqid);
1138         encode_nfs4_stateid(xdr, arg->stateid);
1139 }
1140
1141 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1142 {
1143         __be32 *p;
1144
1145         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1146         p = reserve_space(xdr, 12);
1147         p = xdr_encode_hyper(p, args->offset);
1148         *p = cpu_to_be32(args->count);
1149 }
1150
1151 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1152 {
1153         __be32 *p;
1154
1155         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1156         encode_uint32(xdr, create->ftype);
1157
1158         switch (create->ftype) {
1159         case NF4LNK:
1160                 p = reserve_space(xdr, 4);
1161                 *p = cpu_to_be32(create->u.symlink.len);
1162                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1163                 break;
1164
1165         case NF4BLK: case NF4CHR:
1166                 p = reserve_space(xdr, 8);
1167                 *p++ = cpu_to_be32(create->u.device.specdata1);
1168                 *p = cpu_to_be32(create->u.device.specdata2);
1169                 break;
1170
1171         default:
1172                 break;
1173         }
1174
1175         encode_string(xdr, create->name->len, create->name->name);
1176         encode_attrs(xdr, create->attrs, create->label, create->server);
1177 }
1178
1179 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1180 {
1181         __be32 *p;
1182
1183         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1184         p = reserve_space(xdr, 8);
1185         *p++ = cpu_to_be32(1);
1186         *p = cpu_to_be32(bitmap);
1187 }
1188
1189 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194         p = reserve_space(xdr, 12);
1195         *p++ = cpu_to_be32(2);
1196         *p++ = cpu_to_be32(bm0);
1197         *p = cpu_to_be32(bm1);
1198 }
1199
1200 static void
1201 encode_getattr_three(struct xdr_stream *xdr,
1202                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1203                      struct compound_hdr *hdr)
1204 {
1205         __be32 *p;
1206
1207         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208         if (bm2) {
1209                 p = reserve_space(xdr, 16);
1210                 *p++ = cpu_to_be32(3);
1211                 *p++ = cpu_to_be32(bm0);
1212                 *p++ = cpu_to_be32(bm1);
1213                 *p = cpu_to_be32(bm2);
1214         } else if (bm1) {
1215                 p = reserve_space(xdr, 12);
1216                 *p++ = cpu_to_be32(2);
1217                 *p++ = cpu_to_be32(bm0);
1218                 *p = cpu_to_be32(bm1);
1219         } else {
1220                 p = reserve_space(xdr, 8);
1221                 *p++ = cpu_to_be32(1);
1222                 *p = cpu_to_be32(bm0);
1223         }
1224 }
1225
1226 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1227 {
1228         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1229                            bitmask[1] & nfs4_fattr_bitmap[1],
1230                            bitmask[2] & nfs4_fattr_bitmap[2],
1231                            hdr);
1232 }
1233
1234 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1235                                  const u32 *open_bitmap,
1236                                  struct compound_hdr *hdr)
1237 {
1238         encode_getattr_three(xdr,
1239                              bitmask[0] & open_bitmap[0],
1240                              bitmask[1] & open_bitmap[1],
1241                              bitmask[2] & open_bitmap[2],
1242                              hdr);
1243 }
1244
1245 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1246 {
1247         encode_getattr_three(xdr,
1248                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1249                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1250                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1251                              hdr);
1252 }
1253
1254 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1255 {
1256         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1257                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1258 }
1259
1260 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1261 {
1262         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1263 }
1264
1265 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1266 {
1267         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1268         encode_string(xdr, name->len, name->name);
1269 }
1270
1271 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1272 {
1273         if (fl->fl_type == F_RDLCK)
1274                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1275         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1276 }
1277
1278 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1279 {
1280         if (fl->fl_end == OFFSET_MAX)
1281                 return ~(uint64_t)0;
1282         return fl->fl_end - fl->fl_start + 1;
1283 }
1284
1285 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1286 {
1287         __be32 *p;
1288
1289         p = reserve_space(xdr, 32);
1290         p = xdr_encode_hyper(p, lowner->clientid);
1291         *p++ = cpu_to_be32(20);
1292         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1293         *p++ = cpu_to_be32(lowner->s_dev);
1294         xdr_encode_hyper(p, lowner->id);
1295 }
1296
1297 /*
1298  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1299  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1300  */
1301 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1302 {
1303         __be32 *p;
1304
1305         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1306         p = reserve_space(xdr, 28);
1307         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1308         *p++ = cpu_to_be32(args->reclaim);
1309         p = xdr_encode_hyper(p, args->fl->fl_start);
1310         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311         *p = cpu_to_be32(args->new_lock_owner);
1312         if (args->new_lock_owner){
1313                 encode_nfs4_seqid(xdr, args->open_seqid);
1314                 encode_nfs4_stateid(xdr, args->open_stateid);
1315                 encode_nfs4_seqid(xdr, args->lock_seqid);
1316                 encode_lockowner(xdr, &args->lock_owner);
1317         }
1318         else {
1319                 encode_nfs4_stateid(xdr, args->lock_stateid);
1320                 encode_nfs4_seqid(xdr, args->lock_seqid);
1321         }
1322 }
1323
1324 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1325 {
1326         __be32 *p;
1327
1328         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1329         p = reserve_space(xdr, 20);
1330         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1331         p = xdr_encode_hyper(p, args->fl->fl_start);
1332         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1333         encode_lockowner(xdr, &args->lock_owner);
1334 }
1335
1336 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1337 {
1338         __be32 *p;
1339
1340         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1341         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1342         encode_nfs4_seqid(xdr, args->seqid);
1343         encode_nfs4_stateid(xdr, args->stateid);
1344         p = reserve_space(xdr, 16);
1345         p = xdr_encode_hyper(p, args->fl->fl_start);
1346         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1347 }
1348
1349 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1350 {
1351         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1352         encode_lockowner(xdr, lowner);
1353 }
1354
1355 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1356 {
1357         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1358         encode_string(xdr, name->len, name->name);
1359 }
1360
1361 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1362 {
1363         __be32 *p;
1364
1365         p = reserve_space(xdr, 8);
1366         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1367         case FMODE_READ:
1368                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1369                 break;
1370         case FMODE_WRITE:
1371                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1372                 break;
1373         case FMODE_READ|FMODE_WRITE:
1374                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1375                 break;
1376         default:
1377                 *p++ = cpu_to_be32(0);
1378         }
1379         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1380 }
1381
1382 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384         __be32 *p;
1385  /*
1386  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1387  * owner 4 = 32
1388  */
1389         encode_nfs4_seqid(xdr, arg->seqid);
1390         encode_share_access(xdr, arg->fmode);
1391         p = reserve_space(xdr, 36);
1392         p = xdr_encode_hyper(p, arg->clientid);
1393         *p++ = cpu_to_be32(24);
1394         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1395         *p++ = cpu_to_be32(arg->server->s_dev);
1396         *p++ = cpu_to_be32(arg->id.uniquifier);
1397         xdr_encode_hyper(p, arg->id.create_time);
1398 }
1399
1400 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1401 {
1402         struct iattr dummy;
1403         __be32 *p;
1404
1405         p = reserve_space(xdr, 4);
1406         switch(arg->createmode) {
1407         case NFS4_CREATE_UNCHECKED:
1408                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1410                 break;
1411         case NFS4_CREATE_GUARDED:
1412                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1413                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1414                 break;
1415         case NFS4_CREATE_EXCLUSIVE:
1416                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1417                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1418                 break;
1419         case NFS4_CREATE_EXCLUSIVE4_1:
1420                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1421                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1422                 dummy.ia_valid = 0;
1423                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1424         }
1425 }
1426
1427 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1428 {
1429         __be32 *p;
1430
1431         p = reserve_space(xdr, 4);
1432         switch (arg->open_flags & O_CREAT) {
1433         case 0:
1434                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1435                 break;
1436         default:
1437                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1438                 encode_createmode(xdr, arg);
1439         }
1440 }
1441
1442 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         switch (delegation_type) {
1448         case 0:
1449                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1450                 break;
1451         case FMODE_READ:
1452                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1453                 break;
1454         case FMODE_WRITE|FMODE_READ:
1455                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1456                 break;
1457         default:
1458                 BUG();
1459         }
1460 }
1461
1462 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1463 {
1464         __be32 *p;
1465
1466         p = reserve_space(xdr, 4);
1467         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1468         encode_string(xdr, name->len, name->name);
1469 }
1470
1471 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1472 {
1473         __be32 *p;
1474
1475         p = reserve_space(xdr, 4);
1476         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1477         encode_delegation_type(xdr, type);
1478 }
1479
1480 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1481 {
1482         __be32 *p;
1483
1484         p = reserve_space(xdr, 4);
1485         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1486         encode_nfs4_stateid(xdr, stateid);
1487         encode_string(xdr, name->len, name->name);
1488 }
1489
1490 static inline void encode_claim_fh(struct xdr_stream *xdr)
1491 {
1492         __be32 *p;
1493
1494         p = reserve_space(xdr, 4);
1495         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1496 }
1497
1498 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1499 {
1500         __be32 *p;
1501
1502         p = reserve_space(xdr, 4);
1503         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1504         encode_nfs4_stateid(xdr, stateid);
1505 }
1506
1507 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1508 {
1509         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1510         encode_openhdr(xdr, arg);
1511         encode_opentype(xdr, arg);
1512         switch (arg->claim) {
1513         case NFS4_OPEN_CLAIM_NULL:
1514                 encode_claim_null(xdr, arg->name);
1515                 break;
1516         case NFS4_OPEN_CLAIM_PREVIOUS:
1517                 encode_claim_previous(xdr, arg->u.delegation_type);
1518                 break;
1519         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1520                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1521                 break;
1522         case NFS4_OPEN_CLAIM_FH:
1523                 encode_claim_fh(xdr);
1524                 break;
1525         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1526                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1527                 break;
1528         default:
1529                 BUG();
1530         }
1531 }
1532
1533 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1534 {
1535         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1536         encode_nfs4_stateid(xdr, arg->stateid);
1537         encode_nfs4_seqid(xdr, arg->seqid);
1538 }
1539
1540 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1541 {
1542         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1543         encode_nfs4_stateid(xdr, arg->stateid);
1544         encode_nfs4_seqid(xdr, arg->seqid);
1545         encode_share_access(xdr, arg->fmode);
1546 }
1547
1548 static void
1549 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1550 {
1551         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1552         encode_string(xdr, fh->size, fh->data);
1553 }
1554
1555 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1556 {
1557         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1558 }
1559
1560 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, 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_writeargs *args, struct compound_hdr *hdr)
1706 {
1707         __be32 *p;
1708
1709         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1710         encode_nfs4_stateid(xdr, &args->stateid);
1711
1712         p = reserve_space(xdr, 16);
1713         p = xdr_encode_hyper(p, args->offset);
1714         *p++ = cpu_to_be32(args->stable);
1715         *p = cpu_to_be32(args->count);
1716
1717         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1718 }
1719
1720 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1721 {
1722         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1723         encode_nfs4_stateid(xdr, stateid);
1724 }
1725
1726 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1727 {
1728         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1729         encode_string(xdr, name->len, name->name);
1730 }
1731
1732 #if defined(CONFIG_NFS_V4_1)
1733 /* NFSv4.1 operations */
1734 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1735                                    struct nfs4_session *session,
1736                                    struct compound_hdr *hdr)
1737 {
1738         __be32 *p;
1739
1740         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1741                 decode_bind_conn_to_session_maxsz, hdr);
1742         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1743         p = xdr_reserve_space(xdr, 8);
1744         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1745         *p = 0; /* use_conn_in_rdma_mode = False */
1746 }
1747
1748 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1749 {
1750         unsigned int i;
1751         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1752         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1753                 encode_uint32(xdr, op_map->u.words[i]);
1754 }
1755
1756 static void encode_exchange_id(struct xdr_stream *xdr,
1757                                struct nfs41_exchange_id_args *args,
1758                                struct compound_hdr *hdr)
1759 {
1760         __be32 *p;
1761         char impl_name[IMPL_NAME_LIMIT];
1762         int len = 0;
1763
1764         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1765         encode_nfs4_verifier(xdr, args->verifier);
1766
1767         encode_string(xdr, args->id_len, args->id);
1768
1769         encode_uint32(xdr, args->flags);
1770         encode_uint32(xdr, args->state_protect.how);
1771
1772         switch (args->state_protect.how) {
1773         case SP4_NONE:
1774                 break;
1775         case SP4_MACH_CRED:
1776                 encode_op_map(xdr, &args->state_protect.enforce);
1777                 encode_op_map(xdr, &args->state_protect.allow);
1778                 break;
1779         default:
1780                 WARN_ON_ONCE(1);
1781                 break;
1782         }
1783
1784         if (send_implementation_id &&
1785             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787                 <= sizeof(impl_name) + 1)
1788                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789                                utsname()->sysname, utsname()->release,
1790                                utsname()->version, utsname()->machine);
1791
1792         if (len > 0) {
1793                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1794
1795                 encode_string(xdr,
1796                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798                 encode_string(xdr, len, impl_name);
1799                 /* just send zeros for nii_date - the date is in nii_name */
1800                 p = reserve_space(xdr, 12);
1801                 p = xdr_encode_hyper(p, 0);
1802                 *p = cpu_to_be32(0);
1803         } else
1804                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808                                   struct nfs41_create_session_args *args,
1809                                   struct compound_hdr *hdr)
1810 {
1811         __be32 *p;
1812         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1813         uint32_t len;
1814         struct nfs_client *clp = args->client;
1815         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1816         u32 max_resp_sz_cached;
1817
1818         /*
1819          * Assumes OPEN is the biggest non-idempotent compound.
1820          * 2 is the verifier.
1821          */
1822         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1823                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1824
1825         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1826                         clp->cl_ipaddr);
1827
1828         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1829         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1830         p = xdr_encode_hyper(p, clp->cl_clientid);
1831         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1832         *p++ = cpu_to_be32(args->flags);                        /*flags */
1833
1834         /* Fore Channel */
1835         *p++ = cpu_to_be32(0);                          /* header padding size */
1836         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1837         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1838         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1839         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1841         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1842
1843         /* Back Channel */
1844         *p++ = cpu_to_be32(0);                          /* header padding size */
1845         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1846         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1847         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1848         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1850         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1851
1852         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1853         *p++ = cpu_to_be32(1);
1854         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1855
1856         /* authsys_parms rfc1831 */
1857         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1858         p = xdr_encode_opaque(p, machine_name, len);
1859         *p++ = cpu_to_be32(0);                          /* UID */
1860         *p++ = cpu_to_be32(0);                          /* GID */
1861         *p = cpu_to_be32(0);                            /* No more gids */
1862 }
1863
1864 static void encode_destroy_session(struct xdr_stream *xdr,
1865                                    struct nfs4_session *session,
1866                                    struct compound_hdr *hdr)
1867 {
1868         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1869         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1870 }
1871
1872 static void encode_destroy_clientid(struct xdr_stream *xdr,
1873                                    uint64_t clientid,
1874                                    struct compound_hdr *hdr)
1875 {
1876         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1877         encode_uint64(xdr, clientid);
1878 }
1879
1880 static void encode_reclaim_complete(struct xdr_stream *xdr,
1881                                     struct nfs41_reclaim_complete_args *args,
1882                                     struct compound_hdr *hdr)
1883 {
1884         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1885         encode_uint32(xdr, args->one_fs);
1886 }
1887 #endif /* CONFIG_NFS_V4_1 */
1888
1889 static void encode_sequence(struct xdr_stream *xdr,
1890                             const struct nfs4_sequence_args *args,
1891                             struct compound_hdr *hdr)
1892 {
1893 #if defined(CONFIG_NFS_V4_1)
1894         struct nfs4_session *session;
1895         struct nfs4_slot_table *tp;
1896         struct nfs4_slot *slot = args->sa_slot;
1897         __be32 *p;
1898
1899         tp = slot->table;
1900         session = tp->session;
1901         if (!session)
1902                 return;
1903
1904         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1905
1906         /*
1907          * Sessionid + seqid + slotid + max slotid + cache_this
1908          */
1909         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1910                 "max_slotid=%d cache_this=%d\n",
1911                 __func__,
1912                 ((u32 *)session->sess_id.data)[0],
1913                 ((u32 *)session->sess_id.data)[1],
1914                 ((u32 *)session->sess_id.data)[2],
1915                 ((u32 *)session->sess_id.data)[3],
1916                 slot->seq_nr, slot->slot_nr,
1917                 tp->highest_used_slotid, args->sa_cache_this);
1918         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1919         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1920         *p++ = cpu_to_be32(slot->seq_nr);
1921         *p++ = cpu_to_be32(slot->slot_nr);
1922         *p++ = cpu_to_be32(tp->highest_used_slotid);
1923         *p = cpu_to_be32(args->sa_cache_this);
1924 #endif /* CONFIG_NFS_V4_1 */
1925 }
1926
1927 #ifdef CONFIG_NFS_V4_1
1928 static void
1929 encode_getdevicelist(struct xdr_stream *xdr,
1930                      const struct nfs4_getdevicelist_args *args,
1931                      struct compound_hdr *hdr)
1932 {
1933         __be32 *p;
1934         nfs4_verifier dummy = {
1935                 .data = "dummmmmy",
1936         };
1937
1938         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1939         p = reserve_space(xdr, 16);
1940         *p++ = cpu_to_be32(args->layoutclass);
1941         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1942         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1943         encode_nfs4_verifier(xdr, &dummy);
1944 }
1945
1946 static void
1947 encode_getdeviceinfo(struct xdr_stream *xdr,
1948                      const struct nfs4_getdeviceinfo_args *args,
1949                      struct compound_hdr *hdr)
1950 {
1951         __be32 *p;
1952
1953         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1954         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1955         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1956                                     NFS4_DEVICEID4_SIZE);
1957         *p++ = cpu_to_be32(args->pdev->layout_type);
1958         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1959         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964                       const struct nfs4_layoutget_args *args,
1965                       struct compound_hdr *hdr)
1966 {
1967         __be32 *p;
1968
1969         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970         p = reserve_space(xdr, 36);
1971         *p++ = cpu_to_be32(0);     /* Signal layout available */
1972         *p++ = cpu_to_be32(args->type);
1973         *p++ = cpu_to_be32(args->range.iomode);
1974         p = xdr_encode_hyper(p, args->range.offset);
1975         p = xdr_encode_hyper(p, args->range.length);
1976         p = xdr_encode_hyper(p, args->minlength);
1977         encode_nfs4_stateid(xdr, &args->stateid);
1978         encode_uint32(xdr, args->maxcount);
1979
1980         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981                 __func__,
1982                 args->type,
1983                 args->range.iomode,
1984                 (unsigned long)args->range.offset,
1985                 (unsigned long)args->range.length,
1986                 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991                     struct inode *inode,
1992                     const struct nfs4_layoutcommit_args *args,
1993                     struct compound_hdr *hdr)
1994 {
1995         __be32 *p;
1996
1997         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001         p = reserve_space(xdr, 20);
2002         /* Only whole file layouts */
2003         p = xdr_encode_hyper(p, 0); /* offset */
2004         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2005         *p = cpu_to_be32(0); /* reclaim */
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007         p = reserve_space(xdr, 20);
2008         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2009         p = xdr_encode_hyper(p, args->lastbytewritten);
2010         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2011         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2012
2013         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2014                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2015                         NFS_I(inode)->layout, xdr, args);
2016         else
2017                 encode_uint32(xdr, 0); /* no layout-type payload */
2018
2019         return 0;
2020 }
2021
2022 static void
2023 encode_layoutreturn(struct xdr_stream *xdr,
2024                     const struct nfs4_layoutreturn_args *args,
2025                     struct compound_hdr *hdr)
2026 {
2027         __be32 *p;
2028
2029         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2030         p = reserve_space(xdr, 16);
2031         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2032         *p++ = cpu_to_be32(args->layout_type);
2033         *p++ = cpu_to_be32(IOMODE_ANY);
2034         *p = cpu_to_be32(RETURN_FILE);
2035         p = reserve_space(xdr, 16);
2036         p = xdr_encode_hyper(p, 0);
2037         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2038         spin_lock(&args->inode->i_lock);
2039         encode_nfs4_stateid(xdr, &args->stateid);
2040         spin_unlock(&args->inode->i_lock);
2041         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2042                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2043                         NFS_I(args->inode)->layout, xdr, args);
2044         } else
2045                 encode_uint32(xdr, 0);
2046 }
2047
2048 static int
2049 encode_secinfo_no_name(struct xdr_stream *xdr,
2050                        const struct nfs41_secinfo_no_name_args *args,
2051                        struct compound_hdr *hdr)
2052 {
2053         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2054         encode_uint32(xdr, args->style);
2055         return 0;
2056 }
2057
2058 static void encode_test_stateid(struct xdr_stream *xdr,
2059                                 struct nfs41_test_stateid_args *args,
2060                                 struct compound_hdr *hdr)
2061 {
2062         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2063         encode_uint32(xdr, 1);
2064         encode_nfs4_stateid(xdr, args->stateid);
2065 }
2066
2067 static void encode_free_stateid(struct xdr_stream *xdr,
2068                                 struct nfs41_free_stateid_args *args,
2069                                 struct compound_hdr *hdr)
2070 {
2071         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2072         encode_nfs4_stateid(xdr, &args->stateid);
2073 }
2074 #endif /* CONFIG_NFS_V4_1 */
2075
2076 /*
2077  * END OF "GENERIC" ENCODE ROUTINES.
2078  */
2079
2080 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2081 {
2082 #if defined(CONFIG_NFS_V4_1)
2083         struct nfs4_session *session = args->sa_slot->table->session;
2084         if (session)
2085                 return session->clp->cl_mvops->minor_version;
2086 #endif /* CONFIG_NFS_V4_1 */
2087         return 0;
2088 }
2089
2090 /*
2091  * Encode an ACCESS request
2092  */
2093 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2094                                 const struct nfs4_accessargs *args)
2095 {
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->fh, &hdr);
2103         encode_access(xdr, args->access, &hdr);
2104         encode_getfattr(xdr, args->bitmask, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode LOOKUP request
2110  */
2111 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2112                                 const struct nfs4_lookup_arg *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putfh(xdr, args->dir_fh, &hdr);
2121         encode_lookup(xdr, args->name, &hdr);
2122         encode_getfh(xdr, &hdr);
2123         encode_getfattr(xdr, args->bitmask, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode LOOKUP_ROOT request
2129  */
2130 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2131                                      struct xdr_stream *xdr,
2132                                      const struct nfs4_lookup_root_arg *args)
2133 {
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         encode_compound_hdr(xdr, req, &hdr);
2139         encode_sequence(xdr, &args->seq_args, &hdr);
2140         encode_putrootfh(xdr, &hdr);
2141         encode_getfh(xdr, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 /*
2147  * Encode REMOVE request
2148  */
2149 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2150                                 const struct nfs_removeargs *args)
2151 {
2152         struct compound_hdr hdr = {
2153                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154         };
2155
2156         encode_compound_hdr(xdr, req, &hdr);
2157         encode_sequence(xdr, &args->seq_args, &hdr);
2158         encode_putfh(xdr, args->fh, &hdr);
2159         encode_remove(xdr, &args->name, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode RENAME request
2165  */
2166 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                 const struct nfs_renameargs *args)
2168 {
2169         struct compound_hdr hdr = {
2170                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171         };
2172
2173         encode_compound_hdr(xdr, req, &hdr);
2174         encode_sequence(xdr, &args->seq_args, &hdr);
2175         encode_putfh(xdr, args->old_dir, &hdr);
2176         encode_savefh(xdr, &hdr);
2177         encode_putfh(xdr, args->new_dir, &hdr);
2178         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2179         encode_nops(&hdr);
2180 }
2181
2182 /*
2183  * Encode LINK request
2184  */
2185 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                              const struct nfs4_link_arg *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->fh, &hdr);
2195         encode_savefh(xdr, &hdr);
2196         encode_putfh(xdr, args->dir_fh, &hdr);
2197         encode_link(xdr, args->name, &hdr);
2198         encode_restorefh(xdr, &hdr);
2199         encode_getfattr(xdr, args->bitmask, &hdr);
2200         encode_nops(&hdr);
2201 }
2202
2203 /*
2204  * Encode CREATE request
2205  */
2206 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2207                                 const struct nfs4_create_arg *args)
2208 {
2209         struct compound_hdr hdr = {
2210                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211         };
2212
2213         encode_compound_hdr(xdr, req, &hdr);
2214         encode_sequence(xdr, &args->seq_args, &hdr);
2215         encode_putfh(xdr, args->dir_fh, &hdr);
2216         encode_create(xdr, args, &hdr);
2217         encode_getfh(xdr, &hdr);
2218         encode_getfattr(xdr, args->bitmask, &hdr);
2219         encode_nops(&hdr);
2220 }
2221
2222 /*
2223  * Encode SYMLINK request
2224  */
2225 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                  const struct nfs4_create_arg *args)
2227 {
2228         nfs4_xdr_enc_create(req, xdr, args);
2229 }
2230
2231 /*
2232  * Encode GETATTR request
2233  */
2234 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2235                                  const struct nfs4_getattr_arg *args)
2236 {
2237         struct compound_hdr hdr = {
2238                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2239         };
2240
2241         encode_compound_hdr(xdr, req, &hdr);
2242         encode_sequence(xdr, &args->seq_args, &hdr);
2243         encode_putfh(xdr, args->fh, &hdr);
2244         encode_getfattr(xdr, args->bitmask, &hdr);
2245         encode_nops(&hdr);
2246 }
2247
2248 /*
2249  * Encode a CLOSE request
2250  */
2251 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                struct nfs_closeargs *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_close(xdr, args, &hdr);
2262         encode_getfattr(xdr, args->bitmask, &hdr);
2263         encode_nops(&hdr);
2264 }
2265
2266 /*
2267  * Encode an OPEN request
2268  */
2269 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2270                               struct nfs_openargs *args)
2271 {
2272         struct compound_hdr hdr = {
2273                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274         };
2275
2276         encode_compound_hdr(xdr, req, &hdr);
2277         encode_sequence(xdr, &args->seq_args, &hdr);
2278         encode_putfh(xdr, args->fh, &hdr);
2279         encode_open(xdr, args, &hdr);
2280         encode_getfh(xdr, &hdr);
2281         if (args->access)
2282                 encode_access(xdr, args->access, &hdr);
2283         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2284         encode_nops(&hdr);
2285 }
2286
2287 /*
2288  * Encode an OPEN_CONFIRM request
2289  */
2290 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2291                                       struct xdr_stream *xdr,
2292                                       struct nfs_open_confirmargs *args)
2293 {
2294         struct compound_hdr hdr = {
2295                 .nops   = 0,
2296         };
2297
2298         encode_compound_hdr(xdr, req, &hdr);
2299         encode_putfh(xdr, args->fh, &hdr);
2300         encode_open_confirm(xdr, args, &hdr);
2301         encode_nops(&hdr);
2302 }
2303
2304 /*
2305  * Encode an OPEN request with no attributes.
2306  */
2307 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2308                                      struct xdr_stream *xdr,
2309                                      struct nfs_openargs *args)
2310 {
2311         struct compound_hdr hdr = {
2312                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313         };
2314
2315         encode_compound_hdr(xdr, req, &hdr);
2316         encode_sequence(xdr, &args->seq_args, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_open(xdr, args, &hdr);
2319         if (args->access)
2320                 encode_access(xdr, args->access, &hdr);
2321         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2322         encode_nops(&hdr);
2323 }
2324
2325 /*
2326  * Encode an OPEN_DOWNGRADE request
2327  */
2328 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2329                                         struct xdr_stream *xdr,
2330                                         struct nfs_closeargs *args)
2331 {
2332         struct compound_hdr hdr = {
2333                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334         };
2335
2336         encode_compound_hdr(xdr, req, &hdr);
2337         encode_sequence(xdr, &args->seq_args, &hdr);
2338         encode_putfh(xdr, args->fh, &hdr);
2339         encode_open_downgrade(xdr, args, &hdr);
2340         encode_getfattr(xdr, args->bitmask, &hdr);
2341         encode_nops(&hdr);
2342 }
2343
2344 /*
2345  * Encode a LOCK request
2346  */
2347 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2348                               struct nfs_lock_args *args)
2349 {
2350         struct compound_hdr hdr = {
2351                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352         };
2353
2354         encode_compound_hdr(xdr, req, &hdr);
2355         encode_sequence(xdr, &args->seq_args, &hdr);
2356         encode_putfh(xdr, args->fh, &hdr);
2357         encode_lock(xdr, args, &hdr);
2358         encode_nops(&hdr);
2359 }
2360
2361 /*
2362  * Encode a LOCKT request
2363  */
2364 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2365                                struct nfs_lockt_args *args)
2366 {
2367         struct compound_hdr hdr = {
2368                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2369         };
2370
2371         encode_compound_hdr(xdr, req, &hdr);
2372         encode_sequence(xdr, &args->seq_args, &hdr);
2373         encode_putfh(xdr, args->fh, &hdr);
2374         encode_lockt(xdr, args, &hdr);
2375         encode_nops(&hdr);
2376 }
2377
2378 /*
2379  * Encode a LOCKU request
2380  */
2381 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2382                                struct nfs_locku_args *args)
2383 {
2384         struct compound_hdr hdr = {
2385                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2386         };
2387
2388         encode_compound_hdr(xdr, req, &hdr);
2389         encode_sequence(xdr, &args->seq_args, &hdr);
2390         encode_putfh(xdr, args->fh, &hdr);
2391         encode_locku(xdr, args, &hdr);
2392         encode_nops(&hdr);
2393 }
2394
2395 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2396                                            struct xdr_stream *xdr,
2397                                         struct nfs_release_lockowner_args *args)
2398 {
2399         struct compound_hdr hdr = {
2400                 .minorversion = 0,
2401         };
2402
2403         encode_compound_hdr(xdr, req, &hdr);
2404         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2405         encode_nops(&hdr);
2406 }
2407
2408 /*
2409  * Encode a READLINK request
2410  */
2411 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2412                                   const struct nfs4_readlink *args)
2413 {
2414         struct compound_hdr hdr = {
2415                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416         };
2417
2418         encode_compound_hdr(xdr, req, &hdr);
2419         encode_sequence(xdr, &args->seq_args, &hdr);
2420         encode_putfh(xdr, args->fh, &hdr);
2421         encode_readlink(xdr, args, req, &hdr);
2422
2423         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424                         args->pgbase, args->pglen);
2425         encode_nops(&hdr);
2426 }
2427
2428 /*
2429  * Encode a READDIR request
2430  */
2431 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2432                                  const struct nfs4_readdir_arg *args)
2433 {
2434         struct compound_hdr hdr = {
2435                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2436         };
2437
2438         encode_compound_hdr(xdr, req, &hdr);
2439         encode_sequence(xdr, &args->seq_args, &hdr);
2440         encode_putfh(xdr, args->fh, &hdr);
2441         encode_readdir(xdr, args, req, &hdr);
2442
2443         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2444                          args->pgbase, args->count);
2445         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2446                         __func__, hdr.replen << 2, args->pages,
2447                         args->pgbase, args->count);
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * Encode a READ request
2453  */
2454 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                               struct nfs_readargs *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_read(xdr, args, &hdr);
2465
2466         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2467                          args->pages, args->pgbase, args->count);
2468         req->rq_rcv_buf.flags |= XDRBUF_READ;
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode an SETATTR request
2474  */
2475 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                  struct nfs_setattrargs *args)
2477 {
2478         struct compound_hdr hdr = {
2479                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480         };
2481
2482         encode_compound_hdr(xdr, req, &hdr);
2483         encode_sequence(xdr, &args->seq_args, &hdr);
2484         encode_putfh(xdr, args->fh, &hdr);
2485         encode_setattr(xdr, args, args->server, &hdr);
2486         encode_getfattr(xdr, args->bitmask, &hdr);
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * Encode a GETACL request
2492  */
2493 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                 struct nfs_getaclargs *args)
2495 {
2496         struct compound_hdr hdr = {
2497                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498         };
2499         uint32_t replen;
2500
2501         encode_compound_hdr(xdr, req, &hdr);
2502         encode_sequence(xdr, &args->seq_args, &hdr);
2503         encode_putfh(xdr, args->fh, &hdr);
2504         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2505         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2506
2507         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2508                 args->acl_pages, args->acl_pgbase, args->acl_len);
2509
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * Encode a WRITE request
2515  */
2516 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                struct nfs_writeargs *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522
2523         encode_compound_hdr(xdr, req, &hdr);
2524         encode_sequence(xdr, &args->seq_args, &hdr);
2525         encode_putfh(xdr, args->fh, &hdr);
2526         encode_write(xdr, args, &hdr);
2527         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2528         if (args->bitmask)
2529                 encode_getfattr(xdr, args->bitmask, &hdr);
2530         encode_nops(&hdr);
2531 }
2532
2533 /*
2534  *  a COMMIT request
2535  */
2536 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2537                                 struct nfs_commitargs *args)
2538 {
2539         struct compound_hdr hdr = {
2540                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2541         };
2542
2543         encode_compound_hdr(xdr, req, &hdr);
2544         encode_sequence(xdr, &args->seq_args, &hdr);
2545         encode_putfh(xdr, args->fh, &hdr);
2546         encode_commit(xdr, args, &hdr);
2547         encode_nops(&hdr);
2548 }
2549
2550 /*
2551  * FSINFO request
2552  */
2553 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2554                                 struct nfs4_fsinfo_arg *args)
2555 {
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fh, &hdr);
2563         encode_fsinfo(xdr, args->bitmask, &hdr);
2564         encode_nops(&hdr);
2565 }
2566
2567 /*
2568  * a PATHCONF request
2569  */
2570 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2571                                   const struct nfs4_pathconf_arg *args)
2572 {
2573         struct compound_hdr hdr = {
2574                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575         };
2576
2577         encode_compound_hdr(xdr, req, &hdr);
2578         encode_sequence(xdr, &args->seq_args, &hdr);
2579         encode_putfh(xdr, args->fh, &hdr);
2580         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2581                            &hdr);
2582         encode_nops(&hdr);
2583 }
2584
2585 /*
2586  * a STATFS request
2587  */
2588 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2589                                 const struct nfs4_statfs_arg *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_sequence(xdr, &args->seq_args, &hdr);
2597         encode_putfh(xdr, args->fh, &hdr);
2598         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2599                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * GETATTR_BITMAP request
2605  */
2606 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2607                                      struct xdr_stream *xdr,
2608                                      struct nfs4_server_caps_arg *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_putfh(xdr, args->fhandle, &hdr);
2617         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2618                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2619                            FATTR4_WORD0_LINK_SUPPORT|
2620                            FATTR4_WORD0_SYMLINK_SUPPORT|
2621                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * a RENEW request
2627  */
2628 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2629                                struct nfs_client *clp)
2630 {
2631         struct compound_hdr hdr = {
2632                 .nops   = 0,
2633         };
2634
2635         encode_compound_hdr(xdr, req, &hdr);
2636         encode_renew(xdr, clp->cl_clientid, &hdr);
2637         encode_nops(&hdr);
2638 }
2639
2640 /*
2641  * a SETCLIENTID request
2642  */
2643 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2644                                      struct xdr_stream *xdr,
2645                                      struct nfs4_setclientid *sc)
2646 {
2647         struct compound_hdr hdr = {
2648                 .nops   = 0,
2649         };
2650
2651         encode_compound_hdr(xdr, req, &hdr);
2652         encode_setclientid(xdr, sc, &hdr);
2653         encode_nops(&hdr);
2654 }
2655
2656 /*
2657  * a SETCLIENTID_CONFIRM request
2658  */
2659 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2660                                              struct xdr_stream *xdr,
2661                                              struct nfs4_setclientid_res *arg)
2662 {
2663         struct compound_hdr hdr = {
2664                 .nops   = 0,
2665         };
2666
2667         encode_compound_hdr(xdr, req, &hdr);
2668         encode_setclientid_confirm(xdr, arg, &hdr);
2669         encode_nops(&hdr);
2670 }
2671
2672 /*
2673  * DELEGRETURN request
2674  */
2675 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2676                                      struct xdr_stream *xdr,
2677                                      const struct nfs4_delegreturnargs *args)
2678 {
2679         struct compound_hdr hdr = {
2680                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2681         };
2682
2683         encode_compound_hdr(xdr, req, &hdr);
2684         encode_sequence(xdr, &args->seq_args, &hdr);
2685         encode_putfh(xdr, args->fhandle, &hdr);
2686         encode_getfattr(xdr, args->bitmask, &hdr);
2687         encode_delegreturn(xdr, args->stateid, &hdr);
2688         encode_nops(&hdr);
2689 }
2690
2691 /*
2692  * Encode FS_LOCATIONS request
2693  */
2694 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2695                                       struct xdr_stream *xdr,
2696                                       struct nfs4_fs_locations_arg *args)
2697 {
2698         struct compound_hdr hdr = {
2699                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2700         };
2701         uint32_t replen;
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         if (args->migration) {
2706                 encode_putfh(xdr, args->fh, &hdr);
2707                 replen = hdr.replen;
2708                 encode_fs_locations(xdr, args->bitmask, &hdr);
2709                 if (args->renew)
2710                         encode_renew(xdr, args->clientid, &hdr);
2711         } else {
2712                 encode_putfh(xdr, args->dir_fh, &hdr);
2713                 encode_lookup(xdr, args->name, &hdr);
2714                 replen = hdr.replen;
2715                 encode_fs_locations(xdr, args->bitmask, &hdr);
2716         }
2717
2718         /* Set up reply kvec to capture returned fs_locations array. */
2719         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2720                         0, PAGE_SIZE);
2721         encode_nops(&hdr);
2722 }
2723
2724 /*
2725  * Encode SECINFO request
2726  */
2727 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2728                                 struct xdr_stream *xdr,
2729                                 struct nfs4_secinfo_arg *args)
2730 {
2731         struct compound_hdr hdr = {
2732                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2733         };
2734
2735         encode_compound_hdr(xdr, req, &hdr);
2736         encode_sequence(xdr, &args->seq_args, &hdr);
2737         encode_putfh(xdr, args->dir_fh, &hdr);
2738         encode_secinfo(xdr, args->name, &hdr);
2739         encode_nops(&hdr);
2740 }
2741
2742 /*
2743  * Encode FSID_PRESENT request
2744  */
2745 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2746                                       struct xdr_stream *xdr,
2747                                       struct nfs4_fsid_present_arg *args)
2748 {
2749         struct compound_hdr hdr = {
2750                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2751         };
2752
2753         encode_compound_hdr(xdr, req, &hdr);
2754         encode_sequence(xdr, &args->seq_args, &hdr);
2755         encode_putfh(xdr, args->fh, &hdr);
2756         encode_getfh(xdr, &hdr);
2757         if (args->renew)
2758                 encode_renew(xdr, args->clientid, &hdr);
2759         encode_nops(&hdr);
2760 }
2761
2762 #if defined(CONFIG_NFS_V4_1)
2763 /*
2764  * BIND_CONN_TO_SESSION request
2765  */
2766 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2767                                 struct xdr_stream *xdr,
2768                                 struct nfs_client *clp)
2769 {
2770         struct compound_hdr hdr = {
2771                 .minorversion = clp->cl_mvops->minor_version,
2772         };
2773
2774         encode_compound_hdr(xdr, req, &hdr);
2775         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2776         encode_nops(&hdr);
2777 }
2778
2779 /*
2780  * EXCHANGE_ID request
2781  */
2782 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2783                                      struct xdr_stream *xdr,
2784                                      struct nfs41_exchange_id_args *args)
2785 {
2786         struct compound_hdr hdr = {
2787                 .minorversion = args->client->cl_mvops->minor_version,
2788         };
2789
2790         encode_compound_hdr(xdr, req, &hdr);
2791         encode_exchange_id(xdr, args, &hdr);
2792         encode_nops(&hdr);
2793 }
2794
2795 /*
2796  * a CREATE_SESSION request
2797  */
2798 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2799                                         struct xdr_stream *xdr,
2800                                         struct nfs41_create_session_args *args)
2801 {
2802         struct compound_hdr hdr = {
2803                 .minorversion = args->client->cl_mvops->minor_version,
2804         };
2805
2806         encode_compound_hdr(xdr, req, &hdr);
2807         encode_create_session(xdr, args, &hdr);
2808         encode_nops(&hdr);
2809 }
2810
2811 /*
2812  * a DESTROY_SESSION request
2813  */
2814 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2815                                          struct xdr_stream *xdr,
2816                                          struct nfs4_session *session)
2817 {
2818         struct compound_hdr hdr = {
2819                 .minorversion = session->clp->cl_mvops->minor_version,
2820         };
2821
2822         encode_compound_hdr(xdr, req, &hdr);
2823         encode_destroy_session(xdr, session, &hdr);
2824         encode_nops(&hdr);
2825 }
2826
2827 /*
2828  * a DESTROY_CLIENTID request
2829  */
2830 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2831                                          struct xdr_stream *xdr,
2832                                          struct nfs_client *clp)
2833 {
2834         struct compound_hdr hdr = {
2835                 .minorversion = clp->cl_mvops->minor_version,
2836         };
2837
2838         encode_compound_hdr(xdr, req, &hdr);
2839         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2840         encode_nops(&hdr);
2841 }
2842
2843 /*
2844  * a SEQUENCE request
2845  */
2846 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2847                                   struct nfs4_sequence_args *args)
2848 {
2849         struct compound_hdr hdr = {
2850                 .minorversion = nfs4_xdr_minorversion(args),
2851         };
2852
2853         encode_compound_hdr(xdr, req, &hdr);
2854         encode_sequence(xdr, args, &hdr);
2855         encode_nops(&hdr);
2856 }
2857
2858 /*
2859  * a GET_LEASE_TIME request
2860  */
2861 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2862                                         struct xdr_stream *xdr,
2863                                         struct nfs4_get_lease_time_args *args)
2864 {
2865         struct compound_hdr hdr = {
2866                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2867         };
2868         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2869
2870         encode_compound_hdr(xdr, req, &hdr);
2871         encode_sequence(xdr, &args->la_seq_args, &hdr);
2872         encode_putrootfh(xdr, &hdr);
2873         encode_fsinfo(xdr, lease_bitmap, &hdr);
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  * a RECLAIM_COMPLETE request
2879  */
2880 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2881                                           struct xdr_stream *xdr,
2882                                 struct nfs41_reclaim_complete_args *args)
2883 {
2884         struct compound_hdr hdr = {
2885                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2886         };
2887
2888         encode_compound_hdr(xdr, req, &hdr);
2889         encode_sequence(xdr, &args->seq_args, &hdr);
2890         encode_reclaim_complete(xdr, args, &hdr);
2891         encode_nops(&hdr);
2892 }
2893
2894 /*
2895  * Encode GETDEVICELIST request
2896  */
2897 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2898                                        struct xdr_stream *xdr,
2899                                        struct nfs4_getdevicelist_args *args)
2900 {
2901         struct compound_hdr hdr = {
2902                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2903         };
2904
2905         encode_compound_hdr(xdr, req, &hdr);
2906         encode_sequence(xdr, &args->seq_args, &hdr);
2907         encode_putfh(xdr, args->fh, &hdr);
2908         encode_getdevicelist(xdr, args, &hdr);
2909         encode_nops(&hdr);
2910 }
2911
2912 /*
2913  * Encode GETDEVICEINFO request
2914  */
2915 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2916                                        struct xdr_stream *xdr,
2917                                        struct nfs4_getdeviceinfo_args *args)
2918 {
2919         struct compound_hdr hdr = {
2920                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2921         };
2922
2923         encode_compound_hdr(xdr, req, &hdr);
2924         encode_sequence(xdr, &args->seq_args, &hdr);
2925         encode_getdeviceinfo(xdr, args, &hdr);
2926
2927         /* set up reply kvec. Subtract notification bitmap max size (2)
2928          * so that notification bitmap is put in xdr_buf tail */
2929         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2930                          args->pdev->pages, args->pdev->pgbase,
2931                          args->pdev->pglen);
2932
2933         encode_nops(&hdr);
2934 }
2935
2936 /*
2937  *  Encode LAYOUTGET request
2938  */
2939 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2940                                    struct xdr_stream *xdr,
2941                                    struct nfs4_layoutget_args *args)
2942 {
2943         struct compound_hdr hdr = {
2944                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945         };
2946
2947         encode_compound_hdr(xdr, req, &hdr);
2948         encode_sequence(xdr, &args->seq_args, &hdr);
2949         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2950         encode_layoutget(xdr, args, &hdr);
2951
2952         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2953             args->layout.pages, 0, args->layout.pglen);
2954
2955         encode_nops(&hdr);
2956 }
2957
2958 /*
2959  *  Encode LAYOUTCOMMIT request
2960  */
2961 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2962                                       struct xdr_stream *xdr,
2963                                       struct nfs4_layoutcommit_args *args)
2964 {
2965         struct nfs4_layoutcommit_data *data =
2966                 container_of(args, struct nfs4_layoutcommit_data, args);
2967         struct compound_hdr hdr = {
2968                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969         };
2970
2971         encode_compound_hdr(xdr, req, &hdr);
2972         encode_sequence(xdr, &args->seq_args, &hdr);
2973         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2975         encode_getfattr(xdr, args->bitmask, &hdr);
2976         encode_nops(&hdr);
2977 }
2978
2979 /*
2980  * Encode LAYOUTRETURN request
2981  */
2982 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2983                                       struct xdr_stream *xdr,
2984                                       struct nfs4_layoutreturn_args *args)
2985 {
2986         struct compound_hdr hdr = {
2987                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988         };
2989
2990         encode_compound_hdr(xdr, req, &hdr);
2991         encode_sequence(xdr, &args->seq_args, &hdr);
2992         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2993         encode_layoutreturn(xdr, args, &hdr);
2994         encode_nops(&hdr);
2995 }
2996
2997 /*
2998  * Encode SECINFO_NO_NAME request
2999  */
3000 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3001                                         struct xdr_stream *xdr,
3002                                         struct nfs41_secinfo_no_name_args *args)
3003 {
3004         struct compound_hdr hdr = {
3005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006         };
3007
3008         encode_compound_hdr(xdr, req, &hdr);
3009         encode_sequence(xdr, &args->seq_args, &hdr);
3010         encode_putrootfh(xdr, &hdr);
3011         encode_secinfo_no_name(xdr, args, &hdr);
3012         encode_nops(&hdr);
3013         return 0;
3014 }
3015
3016 /*
3017  *  Encode TEST_STATEID request
3018  */
3019 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3020                                       struct xdr_stream *xdr,
3021                                       struct nfs41_test_stateid_args *args)
3022 {
3023         struct compound_hdr hdr = {
3024                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3025         };
3026
3027         encode_compound_hdr(xdr, req, &hdr);
3028         encode_sequence(xdr, &args->seq_args, &hdr);
3029         encode_test_stateid(xdr, args, &hdr);
3030         encode_nops(&hdr);
3031 }
3032
3033 /*
3034  *  Encode FREE_STATEID request
3035  */
3036 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3037                                      struct xdr_stream *xdr,
3038                                      struct nfs41_free_stateid_args *args)
3039 {
3040         struct compound_hdr hdr = {
3041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3042         };
3043
3044         encode_compound_hdr(xdr, req, &hdr);
3045         encode_sequence(xdr, &args->seq_args, &hdr);
3046         encode_free_stateid(xdr, args, &hdr);
3047         encode_nops(&hdr);
3048 }
3049 #endif /* CONFIG_NFS_V4_1 */
3050
3051 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3052 {
3053         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3054                 "Remaining buffer length is %tu words.\n",
3055                 func, xdr->end - xdr->p);
3056 }
3057
3058 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3059 {
3060         __be32 *p;
3061
3062         p = xdr_inline_decode(xdr, 4);
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         *len = be32_to_cpup(p);
3066         p = xdr_inline_decode(xdr, *len);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         *string = (char *)p;
3070         return 0;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3077 {
3078         __be32 *p;
3079
3080         p = xdr_inline_decode(xdr, 8);
3081         if (unlikely(!p))
3082                 goto out_overflow;
3083         hdr->status = be32_to_cpup(p++);
3084         hdr->taglen = be32_to_cpup(p);
3085
3086         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3087         if (unlikely(!p))
3088                 goto out_overflow;
3089         hdr->tag = (char *)p;
3090         p += XDR_QUADLEN(hdr->taglen);
3091         hdr->nops = be32_to_cpup(p);
3092         if (unlikely(hdr->nops < 1))
3093                 return nfs4_stat_to_errno(hdr->status);
3094         return 0;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         return -EIO;
3098 }
3099
3100 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3101 {
3102         __be32 *p;
3103         uint32_t opnum;
3104         int32_t nfserr;
3105
3106         p = xdr_inline_decode(xdr, 8);
3107         if (unlikely(!p))
3108                 goto out_overflow;
3109         opnum = be32_to_cpup(p++);
3110         if (opnum != expected) {
3111                 dprintk("nfs: Server returned operation"
3112                         " %d but we issued a request for %d\n",
3113                                 opnum, expected);
3114                 return -EIO;
3115         }
3116         nfserr = be32_to_cpup(p);
3117         if (nfserr != NFS_OK)
3118                 return nfs4_stat_to_errno(nfserr);
3119         return 0;
3120 out_overflow:
3121         print_overflow_msg(__func__, xdr);
3122         return -EIO;
3123 }
3124
3125 /* Dummy routine */
3126 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3127 {
3128         __be32 *p;
3129         unsigned int strlen;
3130         char *str;
3131
3132         p = xdr_inline_decode(xdr, 12);
3133         if (likely(p))
3134                 return decode_opaque_inline(xdr, &strlen, &str);
3135         print_overflow_msg(__func__, xdr);
3136         return -EIO;
3137 }
3138
3139 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3140 {
3141         uint32_t bmlen;
3142         __be32 *p;
3143
3144         p = xdr_inline_decode(xdr, 4);
3145         if (unlikely(!p))
3146                 goto out_overflow;
3147         bmlen = be32_to_cpup(p);
3148
3149         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3150         p = xdr_inline_decode(xdr, (bmlen << 2));
3151         if (unlikely(!p))
3152                 goto out_overflow;
3153         if (bmlen > 0) {
3154                 bitmap[0] = be32_to_cpup(p++);
3155                 if (bmlen > 1) {
3156                         bitmap[1] = be32_to_cpup(p++);
3157                         if (bmlen > 2)
3158                                 bitmap[2] = be32_to_cpup(p);
3159                 }
3160         }
3161         return 0;
3162 out_overflow:
3163         print_overflow_msg(__func__, xdr);
3164         return -EIO;
3165 }
3166
3167 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3168 {
3169         __be32 *p;
3170
3171         p = xdr_inline_decode(xdr, 4);
3172         if (unlikely(!p))
3173                 goto out_overflow;
3174         *attrlen = be32_to_cpup(p);
3175         *savep = xdr_stream_pos(xdr);
3176         return 0;
3177 out_overflow:
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3183 {
3184         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3185                 int ret;
3186                 ret = decode_attr_bitmap(xdr, bitmask);
3187                 if (unlikely(ret < 0))
3188                         return ret;
3189                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3190         } else
3191                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3192         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3193                 bitmask[0], bitmask[1], bitmask[2]);
3194         return 0;
3195 }
3196
3197 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3198 {
3199         __be32 *p;
3200         int ret = 0;
3201
3202         *type = 0;
3203         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3204                 return -EIO;
3205         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3206                 p = xdr_inline_decode(xdr, 4);
3207                 if (unlikely(!p))
3208                         goto out_overflow;
3209                 *type = be32_to_cpup(p);
3210                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3211                         dprintk("%s: bad type %d\n", __func__, *type);
3212                         return -EIO;
3213                 }
3214                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3215                 ret = NFS_ATTR_FATTR_TYPE;
3216         }
3217         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3218         return ret;
3219 out_overflow:
3220         print_overflow_msg(__func__, xdr);
3221         return -EIO;
3222 }
3223
3224 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3225                                       uint32_t *bitmap, uint32_t *type)
3226 {
3227         __be32 *p;
3228
3229         *type = 0;
3230         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3231                 return -EIO;
3232         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3233                 p = xdr_inline_decode(xdr, 4);
3234                 if (unlikely(!p))
3235                         goto out_overflow;
3236                 *type = be32_to_cpup(p);
3237                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3238         }
3239         dprintk("%s: expire type=0x%x\n", __func__, *type);
3240         return 0;
3241 out_overflow:
3242         print_overflow_msg(__func__, xdr);
3243         return -EIO;
3244 }
3245
3246 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3247 {
3248         __be32 *p;
3249         int ret = 0;
3250
3251         *change = 0;
3252         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3253                 return -EIO;
3254         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3255                 p = xdr_inline_decode(xdr, 8);
3256                 if (unlikely(!p))
3257                         goto out_overflow;
3258                 xdr_decode_hyper(p, change);
3259                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3260                 ret = NFS_ATTR_FATTR_CHANGE;
3261         }
3262         dprintk("%s: change attribute=%Lu\n", __func__,
3263                         (unsigned long long)*change);
3264         return ret;
3265 out_overflow:
3266         print_overflow_msg(__func__, xdr);
3267         return -EIO;
3268 }
3269
3270 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3271 {
3272         __be32 *p;
3273         int ret = 0;
3274
3275         *size = 0;
3276         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3277                 return -EIO;
3278         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3279                 p = xdr_inline_decode(xdr, 8);
3280                 if (unlikely(!p))
3281                         goto out_overflow;
3282                 xdr_decode_hyper(p, size);
3283                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3284                 ret = NFS_ATTR_FATTR_SIZE;
3285         }
3286         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3287         return ret;
3288 out_overflow:
3289         print_overflow_msg(__func__, xdr);
3290         return -EIO;
3291 }
3292
3293 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294 {
3295         __be32 *p;
3296
3297         *res = 0;
3298         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3299                 return -EIO;
3300         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3301                 p = xdr_inline_decode(xdr, 4);
3302                 if (unlikely(!p))
3303                         goto out_overflow;
3304                 *res = be32_to_cpup(p);
3305                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3306         }
3307         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3308         return 0;
3309 out_overflow:
3310         print_overflow_msg(__func__, xdr);
3311         return -EIO;
3312 }
3313
3314 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3315 {
3316         __be32 *p;
3317
3318         *res = 0;
3319         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3320                 return -EIO;
3321         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3322                 p = xdr_inline_decode(xdr, 4);
3323                 if (unlikely(!p))
3324                         goto out_overflow;
3325                 *res = be32_to_cpup(p);
3326                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3327         }
3328         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3329         return 0;
3330 out_overflow:
3331         print_overflow_msg(__func__, xdr);
3332         return -EIO;
3333 }
3334
3335 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3336 {
3337         __be32 *p;
3338         int ret = 0;
3339
3340         fsid->major = 0;
3341         fsid->minor = 0;
3342         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3343                 return -EIO;
3344         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3345                 p = xdr_inline_decode(xdr, 16);
3346                 if (unlikely(!p))
3347                         goto out_overflow;
3348                 p = xdr_decode_hyper(p, &fsid->major);
3349                 xdr_decode_hyper(p, &fsid->minor);
3350                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3351                 ret = NFS_ATTR_FATTR_FSID;
3352         }
3353         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3354                         (unsigned long long)fsid->major,
3355                         (unsigned long long)fsid->minor);
3356         return ret;
3357 out_overflow:
3358         print_overflow_msg(__func__, xdr);
3359         return -EIO;
3360 }
3361
3362 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363 {
3364         __be32 *p;
3365
3366         *res = 60;
3367         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3368                 return -EIO;
3369         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3370                 p = xdr_inline_decode(xdr, 4);
3371                 if (unlikely(!p))
3372                         goto out_overflow;
3373                 *res = be32_to_cpup(p);
3374                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3375         }
3376         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3377         return 0;
3378 out_overflow:
3379         print_overflow_msg(__func__, xdr);
3380         return -EIO;
3381 }
3382
3383 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3384 {
3385         __be32 *p;
3386
3387         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3388                 return -EIO;
3389         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3390                 p = xdr_inline_decode(xdr, 4);
3391                 if (unlikely(!p))
3392                         goto out_overflow;
3393                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3394                 *res = -be32_to_cpup(p);
3395         }
3396         return 0;
3397 out_overflow:
3398         print_overflow_msg(__func__, xdr);
3399         return -EIO;
3400 }
3401
3402 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3403 {
3404         __be32 *p;
3405         int len;
3406
3407         if (fh != NULL)
3408                 memset(fh, 0, sizeof(*fh));
3409
3410         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3411                 return -EIO;
3412         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3413                 p = xdr_inline_decode(xdr, 4);
3414                 if (unlikely(!p))
3415                         goto out_overflow;
3416                 len = be32_to_cpup(p);
3417                 if (len > NFS4_FHSIZE)
3418                         return -EIO;
3419                 p = xdr_inline_decode(xdr, len);
3420                 if (unlikely(!p))
3421                         goto out_overflow;
3422                 if (fh != NULL) {
3423                         memcpy(fh->data, p, len);
3424                         fh->size = len;
3425                 }
3426                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3427         }
3428         return 0;
3429 out_overflow:
3430         print_overflow_msg(__func__, xdr);
3431         return -EIO;
3432 }
3433
3434 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3435 {
3436         __be32 *p;
3437
3438         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3439         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3440                 return -EIO;
3441         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3442                 p = xdr_inline_decode(xdr, 4);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 *res = be32_to_cpup(p);
3446                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3447         }
3448         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3449         return 0;
3450 out_overflow:
3451         print_overflow_msg(__func__, xdr);
3452         return -EIO;
3453 }
3454
3455 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3456 {
3457         __be32 *p;
3458         int ret = 0;
3459
3460         *fileid = 0;
3461         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3462                 return -EIO;
3463         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3464                 p = xdr_inline_decode(xdr, 8);
3465                 if (unlikely(!p))
3466                         goto out_overflow;
3467                 xdr_decode_hyper(p, fileid);
3468                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3469                 ret = NFS_ATTR_FATTR_FILEID;
3470         }
3471         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3472         return ret;
3473 out_overflow:
3474         print_overflow_msg(__func__, xdr);
3475         return -EIO;
3476 }
3477
3478 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480         __be32 *p;
3481         int ret = 0;
3482
3483         *fileid = 0;
3484         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3485                 return -EIO;
3486         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3487                 p = xdr_inline_decode(xdr, 8);
3488                 if (unlikely(!p))
3489                         goto out_overflow;
3490                 xdr_decode_hyper(p, fileid);
3491                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3492                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3493         }
3494         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495         return ret;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503         __be32 *p;
3504         int status = 0;
3505
3506         *res = 0;
3507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3510                 p = xdr_inline_decode(xdr, 8);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 xdr_decode_hyper(p, res);
3514                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3515         }
3516         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3517         return status;
3518 out_overflow:
3519         print_overflow_msg(__func__, xdr);
3520         return -EIO;
3521 }
3522
3523 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525         __be32 *p;
3526         int status = 0;
3527
3528         *res = 0;
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3532                 p = xdr_inline_decode(xdr, 8);
3533                 if (unlikely(!p))
3534                         goto out_overflow;
3535                 xdr_decode_hyper(p, res);
3536                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3537         }
3538         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3539         return status;
3540 out_overflow:
3541         print_overflow_msg(__func__, xdr);
3542         return -EIO;
3543 }
3544
3545 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547         __be32 *p;
3548         int status = 0;
3549
3550         *res = 0;
3551         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3552                 return -EIO;
3553         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3554                 p = xdr_inline_decode(xdr, 8);
3555                 if (unlikely(!p))
3556                         goto out_overflow;
3557                 xdr_decode_hyper(p, res);
3558                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3559         }
3560         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3561         return status;
3562 out_overflow:
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3568 {
3569         u32 n;
3570         __be32 *p;
3571         int status = 0;
3572
3573         p = xdr_inline_decode(xdr, 4);
3574         if (unlikely(!p))
3575                 goto out_overflow;
3576         n = be32_to_cpup(p);
3577         if (n == 0)
3578                 goto root_path;
3579         dprintk("pathname4: ");
3580         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3581                 dprintk("cannot parse %d components in path\n", n);
3582                 goto out_eio;
3583         }
3584         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3585                 struct nfs4_string *component = &path->components[path->ncomponents];
3586                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3587                 if (unlikely(status != 0))
3588                         goto out_eio;
3589                 ifdebug (XDR)
3590                         pr_cont("%s%.*s ",
3591                                 (path->ncomponents != n ? "/ " : ""),
3592                                 component->len, component->data);
3593         }
3594 out:
3595         return status;
3596 root_path:
3597 /* a root pathname is sent as a zero component4 */
3598         path->ncomponents = 1;
3599         path->components[0].len=0;
3600         path->components[0].data=NULL;
3601         dprintk("pathname4: /\n");
3602         goto out;
3603 out_eio:
3604         dprintk(" status %d", status);
3605         status = -EIO;
3606         goto out;
3607 out_overflow:
3608         print_overflow_msg(__func__, xdr);
3609         return -EIO;
3610 }
3611
3612 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3613 {
3614         int n;
3615         __be32 *p;
3616         int status = -EIO;
3617
3618         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3619                 goto out;
3620         status = 0;
3621         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3622                 goto out;
3623         status = -EIO;
3624         /* Ignore borken servers that return unrequested attrs */
3625         if (unlikely(res == NULL))
3626                 goto out;
3627         dprintk("%s: fsroot:\n", __func__);
3628         status = decode_pathname(xdr, &res->fs_path);
3629         if (unlikely(status != 0))
3630                 goto out;
3631         p = xdr_inline_decode(xdr, 4);
3632         if (unlikely(!p))
3633                 goto out_overflow;
3634         n = be32_to_cpup(p);
3635         if (n <= 0)
3636                 goto out_eio;
3637         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3638                 u32 m;
3639                 struct nfs4_fs_location *loc;
3640
3641                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3642                         break;
3643                 loc = &res->locations[res->nlocations];
3644                 p = xdr_inline_decode(xdr, 4);
3645                 if (unlikely(!p))
3646                         goto out_overflow;
3647                 m = be32_to_cpup(p);
3648
3649                 dprintk("%s: servers:\n", __func__);
3650                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3651                         struct nfs4_string *server;
3652
3653                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3654                                 unsigned int i;
3655                                 dprintk("%s: using first %u of %u servers "
3656                                         "returned for location %u\n",
3657                                                 __func__,
3658                                                 NFS4_FS_LOCATION_MAXSERVERS,
3659                                                 m, res->nlocations);
3660                                 for (i = loc->nservers; i < m; i++) {
3661                                         unsigned int len;
3662                                         char *data;
3663                                         status = decode_opaque_inline(xdr, &len, &data);
3664                                         if (unlikely(status != 0))
3665                                                 goto out_eio;
3666                                 }
3667                                 break;
3668                         }
3669                         server = &loc->servers[loc->nservers];
3670                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3671                         if (unlikely(status != 0))
3672                                 goto out_eio;
3673                         dprintk("%s ", server->data);
3674                 }
3675                 status = decode_pathname(xdr, &loc->rootpath);
3676                 if (unlikely(status != 0))
3677                         goto out_eio;
3678         }
3679         if (res->nlocations != 0)
3680                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3681 out:
3682         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3683         return status;
3684 out_overflow:
3685         print_overflow_msg(__func__, xdr);
3686 out_eio:
3687         status = -EIO;
3688         goto out;
3689 }
3690
3691 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3692 {
3693         __be32 *p;
3694         int status = 0;
3695
3696         *res = 0;
3697         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3698                 return -EIO;
3699         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3700                 p = xdr_inline_decode(xdr, 8);
3701                 if (unlikely(!p))
3702                         goto out_overflow;
3703                 xdr_decode_hyper(p, res);
3704                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3705         }
3706         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3707         return status;
3708 out_overflow:
3709         print_overflow_msg(__func__, xdr);
3710         return -EIO;
3711 }
3712
3713 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3714 {
3715         __be32 *p;
3716         int status = 0;
3717
3718         *maxlink = 1;
3719         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3720                 return -EIO;
3721         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3722                 p = xdr_inline_decode(xdr, 4);
3723                 if (unlikely(!p))
3724                         goto out_overflow;
3725                 *maxlink = be32_to_cpup(p);
3726                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3727         }
3728         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3729         return status;
3730 out_overflow:
3731         print_overflow_msg(__func__, xdr);
3732         return -EIO;
3733 }
3734
3735 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3736 {
3737         __be32 *p;
3738         int status = 0;
3739
3740         *maxname = 1024;
3741         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3742                 return -EIO;
3743         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3744                 p = xdr_inline_decode(xdr, 4);
3745                 if (unlikely(!p))
3746                         goto out_overflow;
3747                 *maxname = be32_to_cpup(p);
3748                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3749         }
3750         dprintk("%s: maxname=%u\n", __func__, *maxname);
3751         return status;
3752 out_overflow:
3753         print_overflow_msg(__func__, xdr);
3754         return -EIO;
3755 }
3756
3757 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3758 {
3759         __be32 *p;
3760         int status = 0;
3761
3762         *res = 1024;
3763         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3764                 return -EIO;
3765         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3766                 uint64_t maxread;
3767                 p = xdr_inline_decode(xdr, 8);
3768                 if (unlikely(!p))
3769                         goto out_overflow;
3770                 xdr_decode_hyper(p, &maxread);
3771                 if (maxread > 0x7FFFFFFF)
3772                         maxread = 0x7FFFFFFF;
3773                 *res = (uint32_t)maxread;
3774                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3775         }
3776         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3777         return status;
3778 out_overflow:
3779         print_overflow_msg(__func__, xdr);
3780         return -EIO;
3781 }
3782
3783 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3784 {
3785         __be32 *p;
3786         int status = 0;
3787
3788         *res = 1024;
3789         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3790                 return -EIO;
3791         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3792                 uint64_t maxwrite;
3793                 p = xdr_inline_decode(xdr, 8);
3794                 if (unlikely(!p))
3795                         goto out_overflow;
3796                 xdr_decode_hyper(p, &maxwrite);
3797                 if (maxwrite > 0x7FFFFFFF)
3798                         maxwrite = 0x7FFFFFFF;
3799                 *res = (uint32_t)maxwrite;
3800                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3801         }
3802         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3803         return status;
3804 out_overflow:
3805         print_overflow_msg(__func__, xdr);
3806         return -EIO;
3807 }
3808
3809 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3810 {
3811         uint32_t tmp;
3812         __be32 *p;
3813         int ret = 0;
3814
3815         *mode = 0;
3816         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3817                 return -EIO;
3818         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3819                 p = xdr_inline_decode(xdr, 4);
3820                 if (unlikely(!p))
3821                         goto out_overflow;
3822                 tmp = be32_to_cpup(p);
3823                 *mode = tmp & ~S_IFMT;
3824                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3825                 ret = NFS_ATTR_FATTR_MODE;
3826         }
3827         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3828         return ret;
3829 out_overflow:
3830         print_overflow_msg(__func__, xdr);
3831         return -EIO;
3832 }
3833
3834 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3835 {
3836         __be32 *p;
3837         int ret = 0;
3838
3839         *nlink = 1;
3840         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3841                 return -EIO;
3842         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3843                 p = xdr_inline_decode(xdr, 4);
3844                 if (unlikely(!p))
3845                         goto out_overflow;
3846                 *nlink = be32_to_cpup(p);
3847                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3848                 ret = NFS_ATTR_FATTR_NLINK;
3849         }
3850         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3851         return ret;
3852 out_overflow:
3853         print_overflow_msg(__func__, xdr);
3854         return -EIO;
3855 }
3856
3857 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3858                 const struct nfs_server *server, kuid_t *uid,
3859                 struct nfs4_string *owner_name)
3860 {
3861         uint32_t len;
3862         __be32 *p;
3863         int ret = 0;
3864
3865         *uid = make_kuid(&init_user_ns, -2);
3866         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3867                 return -EIO;
3868         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3869                 p = xdr_inline_decode(xdr, 4);
3870                 if (unlikely(!p))
3871                         goto out_overflow;
3872                 len = be32_to_cpup(p);
3873                 p = xdr_inline_decode(xdr, len);
3874                 if (unlikely(!p))
3875                         goto out_overflow;
3876                 if (owner_name != NULL) {
3877                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3878                         if (owner_name->data != NULL) {
3879                                 owner_name->len = len;
3880                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3881                         }
3882                 } else if (len < XDR_MAX_NETOBJ) {
3883                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3884                                 ret = NFS_ATTR_FATTR_OWNER;
3885                         else
3886                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3887                                                 __func__);
3888                 } else
3889                         dprintk("%s: name too long (%u)!\n",
3890                                         __func__, len);
3891                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3892         }
3893         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3894         return ret;
3895 out_overflow:
3896         print_overflow_msg(__func__, xdr);
3897         return -EIO;
3898 }
3899
3900 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3901                 const struct nfs_server *server, kgid_t *gid,
3902                 struct nfs4_string *group_name)
3903 {
3904         uint32_t len;
3905         __be32 *p;
3906         int ret = 0;
3907
3908         *gid = make_kgid(&init_user_ns, -2);
3909         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3910                 return -EIO;
3911         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3912                 p = xdr_inline_decode(xdr, 4);
3913                 if (unlikely(!p))
3914                         goto out_overflow;
3915                 len = be32_to_cpup(p);
3916                 p = xdr_inline_decode(xdr, len);
3917                 if (unlikely(!p))
3918                         goto out_overflow;
3919                 if (group_name != NULL) {
3920                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3921                         if (group_name->data != NULL) {
3922                                 group_name->len = len;
3923                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3924                         }
3925                 } else if (len < XDR_MAX_NETOBJ) {
3926                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3927                                 ret = NFS_ATTR_FATTR_GROUP;
3928                         else
3929                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3930                                                 __func__);
3931                 } else
3932                         dprintk("%s: name too long (%u)!\n",
3933                                         __func__, len);
3934                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3935         }
3936         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3937         return ret;
3938 out_overflow:
3939         print_overflow_msg(__func__, xdr);
3940         return -EIO;
3941 }
3942
3943 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3944 {
3945         uint32_t major = 0, minor = 0;
3946         __be32 *p;
3947         int ret = 0;
3948
3949         *rdev = MKDEV(0,0);
3950         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3951                 return -EIO;
3952         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3953                 dev_t tmp;
3954
3955                 p = xdr_inline_decode(xdr, 8);
3956                 if (unlikely(!p))
3957                         goto out_overflow;
3958                 major = be32_to_cpup(p++);
3959                 minor = be32_to_cpup(p);
3960                 tmp = MKDEV(major, minor);
3961                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3962                         *rdev = tmp;
3963                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3964                 ret = NFS_ATTR_FATTR_RDEV;
3965         }
3966         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3967         return ret;
3968 out_overflow:
3969         print_overflow_msg(__func__, xdr);
3970         return -EIO;
3971 }
3972
3973 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975         __be32 *p;
3976         int status = 0;
3977
3978         *res = 0;
3979         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3980                 return -EIO;
3981         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3982                 p = xdr_inline_decode(xdr, 8);
3983                 if (unlikely(!p))
3984                         goto out_overflow;
3985                 xdr_decode_hyper(p, res);
3986                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3987         }
3988         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3989         return status;
3990 out_overflow:
3991         print_overflow_msg(__func__, xdr);
3992         return -EIO;
3993 }
3994
3995 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3996 {
3997         __be32 *p;
3998         int status = 0;
3999
4000         *res = 0;
4001         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4002                 return -EIO;
4003         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4004                 p = xdr_inline_decode(xdr, 8);
4005                 if (unlikely(!p))
4006                         goto out_overflow;
4007                 xdr_decode_hyper(p, res);
4008                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4009         }
4010         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4011         return status;
4012 out_overflow:
4013         print_overflow_msg(__func__, xdr);
4014         return -EIO;
4015 }
4016
4017 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4018 {
4019         __be32 *p;
4020         int status = 0;
4021
4022         *res = 0;
4023         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4024                 return -EIO;
4025         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4026                 p = xdr_inline_decode(xdr, 8);
4027                 if (unlikely(!p))
4028                         goto out_overflow;
4029                 xdr_decode_hyper(p, res);
4030                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4031         }
4032         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4033         return status;
4034 out_overflow:
4035         print_overflow_msg(__func__, xdr);
4036         return -EIO;
4037 }
4038
4039 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4040 {
4041         __be32 *p;
4042         int ret = 0;
4043
4044         *used = 0;
4045         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4046                 return -EIO;
4047         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4048                 p = xdr_inline_decode(xdr, 8);
4049                 if (unlikely(!p))
4050                         goto out_overflow;
4051                 xdr_decode_hyper(p, used);
4052                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4053                 ret = NFS_ATTR_FATTR_SPACE_USED;
4054         }
4055         dprintk("%s: space used=%Lu\n", __func__,
4056                         (unsigned long long)*used);
4057         return ret;
4058 out_overflow:
4059         print_overflow_msg(__func__, xdr);
4060         return -EIO;
4061 }
4062
4063 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4064 {
4065         __be32 *p;
4066         uint64_t sec;
4067         uint32_t nsec;
4068
4069         p = xdr_inline_decode(xdr, 12);
4070         if (unlikely(!p))
4071                 goto out_overflow;
4072         p = xdr_decode_hyper(p, &sec);
4073         nsec = be32_to_cpup(p);
4074         time->tv_sec = (time_t)sec;
4075         time->tv_nsec = (long)nsec;
4076         return 0;
4077 out_overflow:
4078         print_overflow_msg(__func__, xdr);
4079         return -EIO;
4080 }
4081
4082 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4083 {
4084         int status = 0;
4085
4086         time->tv_sec = 0;
4087         time->tv_nsec = 0;
4088         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4089                 return -EIO;
4090         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4091                 status = decode_attr_time(xdr, time);
4092                 if (status == 0)
4093                         status = NFS_ATTR_FATTR_ATIME;
4094                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4095         }
4096         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4097         return status;
4098 }
4099
4100 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4101 {
4102         int status = 0;
4103
4104         time->tv_sec = 0;
4105         time->tv_nsec = 0;
4106         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4107                 return -EIO;
4108         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4109                 status = decode_attr_time(xdr, time);
4110                 if (status == 0)
4111                         status = NFS_ATTR_FATTR_CTIME;
4112                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4113         }
4114         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4115         return status;
4116 }
4117
4118 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4119                                   struct timespec *time)
4120 {
4121         int status = 0;
4122
4123         time->tv_sec = 0;
4124         time->tv_nsec = 0;
4125         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4126                 return -EIO;
4127         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4128                 status = decode_attr_time(xdr, time);
4129                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4130         }
4131         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4132                 (long)time->tv_nsec);
4133         return status;
4134 }
4135
4136 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4137                                         struct nfs4_label *label)
4138 {
4139         uint32_t pi = 0;
4140         uint32_t lfs = 0;
4141         __u32 len;
4142         __be32 *p;
4143         int status = 0;
4144
4145         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4146                 return -EIO;
4147         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4148                 p = xdr_inline_decode(xdr, 4);
4149                 if (unlikely(!p))
4150                         goto out_overflow;
4151                 lfs = be32_to_cpup(p++);
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         goto out_overflow;
4155                 pi = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, 4);
4157                 if (unlikely(!p))
4158                         goto out_overflow;
4159                 len = be32_to_cpup(p++);
4160                 p = xdr_inline_decode(xdr, len);
4161                 if (unlikely(!p))
4162                         goto out_overflow;
4163                 if (len < NFS4_MAXLABELLEN) {
4164                         if (label) {
4165                                 memcpy(label->label, p, len);
4166                                 label->len = len;
4167                                 label->pi = pi;
4168                                 label->lfs = lfs;
4169                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4170                         }
4171                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4172                 } else
4173                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4174                                         __func__, len);
4175         }
4176         if (label && label->label)
4177                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4178                         (char *)label->label, label->len, label->pi, label->lfs);
4179         return status;
4180
4181 out_overflow:
4182         print_overflow_msg(__func__, xdr);
4183         return -EIO;
4184 }
4185
4186 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4187 {
4188         int status = 0;
4189
4190         time->tv_sec = 0;
4191         time->tv_nsec = 0;
4192         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4193                 return -EIO;
4194         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4195                 status = decode_attr_time(xdr, time);
4196                 if (status == 0)
4197                         status = NFS_ATTR_FATTR_MTIME;
4198                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4199         }
4200         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4201         return status;
4202 }
4203
4204 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4205 {
4206         unsigned int attrwords = XDR_QUADLEN(attrlen);
4207         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4208
4209         if (unlikely(attrwords != nwords)) {
4210                 dprintk("%s: server returned incorrect attribute length: "
4211                         "%u %c %u\n",
4212                                 __func__,
4213                                 attrwords << 2,
4214                                 (attrwords < nwords) ? '<' : '>',
4215                                 nwords << 2);
4216                 return -EIO;
4217         }
4218         return 0;
4219 }
4220
4221 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4222 {
4223         __be32 *p;
4224
4225         p = xdr_inline_decode(xdr, 20);
4226         if (unlikely(!p))
4227                 goto out_overflow;
4228         cinfo->atomic = be32_to_cpup(p++);
4229         p = xdr_decode_hyper(p, &cinfo->before);
4230         xdr_decode_hyper(p, &cinfo->after);
4231         return 0;
4232 out_overflow:
4233         print_overflow_msg(__func__, xdr);
4234         return -EIO;
4235 }
4236
4237 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238 {
4239         __be32 *p;
4240         uint32_t supp, acc;
4241         int status;
4242
4243         status = decode_op_hdr(xdr, OP_ACCESS);
4244         if (status)
4245                 return status;
4246         p = xdr_inline_decode(xdr, 8);
4247         if (unlikely(!p))
4248                 goto out_overflow;
4249         supp = be32_to_cpup(p++);
4250         acc = be32_to_cpup(p);
4251         *supported = supp;
4252         *access = acc;
4253         return 0;
4254 out_overflow:
4255         print_overflow_msg(__func__, xdr);
4256         return -EIO;
4257 }
4258
4259 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4260 {
4261         __be32 *p;
4262
4263         p = xdr_inline_decode(xdr, len);
4264         if (likely(p)) {
4265                 memcpy(buf, p, len);
4266                 return 0;
4267         }
4268         print_overflow_msg(__func__, xdr);
4269         return -EIO;
4270 }
4271
4272 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4273 {
4274         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4275 }
4276
4277 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4278 {
4279         int status;
4280
4281         status = decode_op_hdr(xdr, OP_CLOSE);
4282         if (status != -EIO)
4283                 nfs_increment_open_seqid(status, res->seqid);
4284         if (!status)
4285                 status = decode_stateid(xdr, &res->stateid);
4286         return status;
4287 }
4288
4289 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4290 {
4291         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4292 }
4293
4294 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4295 {
4296         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4297 }
4298
4299 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4300 {
4301         int status;
4302
4303         status = decode_op_hdr(xdr, OP_COMMIT);
4304         if (!status)
4305                 status = decode_write_verifier(xdr, &res->verf->verifier);
4306         return status;
4307 }
4308
4309 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4310 {
4311         __be32 *p;
4312         uint32_t bmlen;
4313         int status;
4314
4315         status = decode_op_hdr(xdr, OP_CREATE);
4316         if (status)
4317                 return status;
4318         if ((status = decode_change_info(xdr, cinfo)))
4319                 return status;
4320         p = xdr_inline_decode(xdr, 4);
4321         if (unlikely(!p))
4322                 goto out_overflow;
4323         bmlen = be32_to_cpup(p);
4324         p = xdr_inline_decode(xdr, bmlen << 2);
4325         if (likely(p))
4326                 return 0;
4327 out_overflow:
4328         print_overflow_msg(__func__, xdr);
4329         return -EIO;
4330 }
4331
4332 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4333 {
4334         unsigned int savep;
4335         uint32_t attrlen, bitmap[3] = {0};
4336         int status;
4337
4338         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4339                 goto xdr_error;
4340         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4341                 goto xdr_error;
4342         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4343                 goto xdr_error;
4344         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4345                 goto xdr_error;
4346         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4347                                                  &res->fh_expire_type)) != 0)
4348                 goto xdr_error;
4349         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4350                 goto xdr_error;
4351         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4352                 goto xdr_error;
4353         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4354                 goto xdr_error;
4355         status = verify_attr_len(xdr, savep, attrlen);
4356 xdr_error:
4357         dprintk("%s: xdr returned %d!\n", __func__, -status);
4358         return status;
4359 }
4360
4361 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4362 {
4363         unsigned int savep;
4364         uint32_t attrlen, bitmap[3] = {0};
4365         int status;
4366
4367         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4368                 goto xdr_error;
4369         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4370                 goto xdr_error;
4371         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4372                 goto xdr_error;
4373
4374         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4375                 goto xdr_error;
4376         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4377                 goto xdr_error;
4378         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4379                 goto xdr_error;
4380         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4381                 goto xdr_error;
4382         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4385                 goto xdr_error;
4386
4387         status = verify_attr_len(xdr, savep, attrlen);
4388 xdr_error:
4389         dprintk("%s: xdr returned %d!\n", __func__, -status);
4390         return status;
4391 }
4392
4393 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4394 {
4395         unsigned int savep;
4396         uint32_t attrlen, bitmap[3] = {0};
4397         int status;
4398
4399         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4404                 goto xdr_error;
4405
4406         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4407                 goto xdr_error;
4408         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4409                 goto xdr_error;
4410
4411         status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413         dprintk("%s: xdr returned %d!\n", __func__, -status);
4414         return status;
4415 }
4416
4417 static int decode_threshold_hint(struct xdr_stream *xdr,
4418                                   uint32_t *bitmap,
4419                                   uint64_t *res,
4420                                   uint32_t hint_bit)
4421 {
4422         __be32 *p;
4423
4424         *res = 0;
4425         if (likely(bitmap[0] & hint_bit)) {
4426                 p = xdr_inline_decode(xdr, 8);
4427                 if (unlikely(!p))
4428                         goto out_overflow;
4429                 xdr_decode_hyper(p, res);
4430         }
4431         return 0;
4432 out_overflow:
4433         print_overflow_msg(__func__, xdr);
4434         return -EIO;
4435 }
4436
4437 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4438                                         struct nfs4_threshold *res)
4439 {
4440         __be32 *p;
4441         unsigned int savep;
4442         uint32_t bitmap[3] = {0,}, attrlen;
4443         int status;
4444
4445         /* layout type */
4446         p = xdr_inline_decode(xdr, 4);
4447         if (unlikely(!p)) {
4448                 print_overflow_msg(__func__, xdr);
4449                 return -EIO;
4450         }
4451         res->l_type = be32_to_cpup(p);
4452
4453         /* thi_hintset bitmap */
4454         status = decode_attr_bitmap(xdr, bitmap);
4455         if (status < 0)
4456                 goto xdr_error;
4457
4458         /* thi_hintlist length */
4459         status = decode_attr_length(xdr, &attrlen, &savep);
4460         if (status < 0)
4461                 goto xdr_error;
4462         /* thi_hintlist */
4463         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4464         if (status < 0)
4465                 goto xdr_error;
4466         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4467         if (status < 0)
4468                 goto xdr_error;
4469         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4470                                        THRESHOLD_RD_IO);
4471         if (status < 0)
4472                 goto xdr_error;
4473         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4474                                        THRESHOLD_WR_IO);
4475         if (status < 0)
4476                 goto xdr_error;
4477
4478         status = verify_attr_len(xdr, savep, attrlen);
4479         res->bm = bitmap[0];
4480
4481         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4482                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4483                 res->wr_io_sz);
4484 xdr_error:
4485         dprintk("%s ret=%d!\n", __func__, status);
4486         return status;
4487 }
4488
4489 /*
4490  * Thresholds on pNFS direct I/O vrs MDS I/O
4491  */
4492 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4493                                     uint32_t *bitmap,
4494                                     struct nfs4_threshold *res)
4495 {
4496         __be32 *p;
4497         int status = 0;
4498         uint32_t num;
4499
4500         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4501                 return -EIO;
4502         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4503                 /* Did the server return an unrequested attribute? */
4504                 if (unlikely(res == NULL))
4505                         return -EREMOTEIO;
4506                 p = xdr_inline_decode(xdr, 4);
4507                 if (unlikely(!p))
4508                         goto out_overflow;
4509                 num = be32_to_cpup(p);
4510                 if (num == 0)
4511                         return 0;
4512                 if (num > 1)
4513                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4514                                 "drivers per filesystem not supported\n",
4515                                 __func__);
4516
4517                 status = decode_first_threshold_item4(xdr, res);
4518                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4519         }
4520         return status;
4521 out_overflow:
4522         print_overflow_msg(__func__, xdr);
4523         return -EIO;
4524 }
4525
4526 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4527                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4528                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4529                 const struct nfs_server *server)
4530 {
4531         int status;
4532         umode_t fmode = 0;
4533         uint32_t type;
4534         int32_t err;
4535
4536         status = decode_attr_type(xdr, bitmap, &type);
4537         if (status < 0)
4538                 goto xdr_error;
4539         fattr->mode = 0;
4540         if (status != 0) {
4541                 fattr->mode |= nfs_type2fmt[type];
4542                 fattr->valid |= status;
4543         }
4544
4545         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4546         if (status < 0)
4547                 goto xdr_error;
4548         fattr->valid |= status;
4549
4550         status = decode_attr_size(xdr, bitmap, &fattr->size);
4551         if (status < 0)
4552                 goto xdr_error;
4553         fattr->valid |= status;
4554
4555         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4556         if (status < 0)
4557                 goto xdr_error;
4558         fattr->valid |= status;
4559
4560         err = 0;
4561         status = decode_attr_error(xdr, bitmap, &err);
4562         if (status < 0)
4563                 goto xdr_error;
4564
4565         status = decode_attr_filehandle(xdr, bitmap, fh);
4566         if (status < 0)
4567                 goto xdr_error;
4568
4569         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4570         if (status < 0)
4571                 goto xdr_error;
4572         fattr->valid |= status;
4573
4574         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4575         if (status < 0)
4576                 goto xdr_error;
4577         fattr->valid |= status;
4578
4579         status = decode_attr_mode(xdr, bitmap, &fmode);
4580         if (status < 0)
4581                 goto xdr_error;
4582         if (status != 0) {
4583                 fattr->mode |= fmode;
4584                 fattr->valid |= status;
4585         }
4586
4587         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4588         if (status < 0)
4589                 goto xdr_error;
4590         fattr->valid |= status;
4591
4592         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4593         if (status < 0)
4594                 goto xdr_error;
4595         fattr->valid |= status;
4596
4597         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4598         if (status < 0)
4599                 goto xdr_error;
4600         fattr->valid |= status;
4601
4602         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4603         if (status < 0)
4604                 goto xdr_error;
4605         fattr->valid |= status;
4606
4607         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4608         if (status < 0)
4609                 goto xdr_error;
4610         fattr->valid |= status;
4611
4612         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616
4617         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4618         if (status < 0)
4619                 goto xdr_error;
4620         fattr->valid |= status;
4621
4622         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4623         if (status < 0)
4624                 goto xdr_error;
4625         fattr->valid |= status;
4626
4627         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4628         if (status < 0)
4629                 goto xdr_error;
4630         fattr->valid |= status;
4631
4632         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4633         if (status < 0)
4634                 goto xdr_error;
4635
4636         if (label) {
4637                 status = decode_attr_security_label(xdr, bitmap, label);
4638                 if (status < 0)
4639                         goto xdr_error;
4640                 fattr->valid |= status;
4641         }
4642
4643 xdr_error:
4644         dprintk("%s: xdr returned %d\n", __func__, -status);
4645         return status;
4646 }
4647
4648 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4649                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4650                 struct nfs4_label *label, const struct nfs_server *server)
4651 {
4652         unsigned int savep;
4653         uint32_t attrlen,
4654                  bitmap[3] = {0};
4655         int status;
4656
4657         status = decode_op_hdr(xdr, OP_GETATTR);
4658         if (status < 0)
4659                 goto xdr_error;
4660
4661         status = decode_attr_bitmap(xdr, bitmap);
4662         if (status < 0)
4663                 goto xdr_error;
4664
4665         status = decode_attr_length(xdr, &attrlen, &savep);
4666         if (status < 0)
4667                 goto xdr_error;
4668
4669         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4670                                         label, server);
4671         if (status < 0)
4672                 goto xdr_error;
4673
4674         status = verify_attr_len(xdr, savep, attrlen);
4675 xdr_error:
4676         dprintk("%s: xdr returned %d\n", __func__, -status);
4677         return status;
4678 }
4679
4680 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4681                 struct nfs4_label *label, const struct nfs_server *server)
4682 {
4683         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4684 }
4685
4686 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4687                 const struct nfs_server *server)
4688 {
4689         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4690 }
4691
4692 /*
4693  * Decode potentially multiple layout types. Currently we only support
4694  * one layout driver per file system.
4695  */
4696 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4697                                          uint32_t *layouttype)
4698 {
4699         __be32 *p;
4700         int num;
4701
4702         p = xdr_inline_decode(xdr, 4);
4703         if (unlikely(!p))
4704                 goto out_overflow;
4705         num = be32_to_cpup(p);
4706
4707         /* pNFS is not supported by the underlying file system */
4708         if (num == 0) {
4709                 *layouttype = 0;
4710                 return 0;
4711         }
4712         if (num > 1)
4713                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4714                         "drivers per filesystem not supported\n", __func__);
4715
4716         /* Decode and set first layout type, move xdr->p past unused types */
4717         p = xdr_inline_decode(xdr, num * 4);
4718         if (unlikely(!p))
4719                 goto out_overflow;
4720         *layouttype = be32_to_cpup(p);
4721         return 0;
4722 out_overflow:
4723         print_overflow_msg(__func__, xdr);
4724         return -EIO;
4725 }
4726
4727 /*
4728  * The type of file system exported.
4729  * Note we must ensure that layouttype is set in any non-error case.
4730  */
4731 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4732                                 uint32_t *layouttype)
4733 {
4734         int status = 0;
4735
4736         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4737         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4738                 return -EIO;
4739         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4740                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4741                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4742         } else
4743                 *layouttype = 0;
4744         return status;
4745 }
4746
4747 /*
4748  * The prefered block size for layout directed io
4749  */
4750 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4751                                       uint32_t *res)
4752 {
4753         __be32 *p;
4754
4755         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4756         *res = 0;
4757         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4758                 p = xdr_inline_decode(xdr, 4);
4759                 if (unlikely(!p)) {
4760                         print_overflow_msg(__func__, xdr);
4761                         return -EIO;
4762                 }
4763                 *res = be32_to_cpup(p);
4764                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4765         }
4766         return 0;
4767 }
4768
4769 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4770 {
4771         unsigned int savep;
4772         uint32_t attrlen, bitmap[3];
4773         int status;
4774
4775         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4776                 goto xdr_error;
4777         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4778                 goto xdr_error;
4779         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4780                 goto xdr_error;
4781
4782         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4783
4784         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4785                 goto xdr_error;
4786         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4787                 goto xdr_error;
4788         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4789                 goto xdr_error;
4790         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4791         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4792                 goto xdr_error;
4793         fsinfo->wtpref = fsinfo->wtmax;
4794         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4795         if (status != 0)
4796                 goto xdr_error;
4797         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4798         if (status != 0)
4799                 goto xdr_error;
4800         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4801         if (status)
4802                 goto xdr_error;
4803
4804         status = verify_attr_len(xdr, savep, attrlen);
4805 xdr_error:
4806         dprintk("%s: xdr returned %d!\n", __func__, -status);
4807         return status;
4808 }
4809
4810 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4811 {
4812         __be32 *p;
4813         uint32_t len;
4814         int status;
4815
4816         /* Zero handle first to allow comparisons */
4817         memset(fh, 0, sizeof(*fh));
4818
4819         status = decode_op_hdr(xdr, OP_GETFH);
4820         if (status)
4821                 return status;
4822
4823         p = xdr_inline_decode(xdr, 4);
4824         if (unlikely(!p))
4825                 goto out_overflow;
4826         len = be32_to_cpup(p);
4827         if (len > NFS4_FHSIZE)
4828                 return -EIO;
4829         fh->size = len;
4830         p = xdr_inline_decode(xdr, len);
4831         if (unlikely(!p))
4832                 goto out_overflow;
4833         memcpy(fh->data, p, len);
4834         return 0;
4835 out_overflow:
4836         print_overflow_msg(__func__, xdr);
4837         return -EIO;
4838 }
4839
4840 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4841 {
4842         int status;
4843
4844         status = decode_op_hdr(xdr, OP_LINK);
4845         if (status)
4846                 return status;
4847         return decode_change_info(xdr, cinfo);
4848 }
4849
4850 /*
4851  * We create the owner, so we know a proper owner.id length is 4.
4852  */
4853 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4854 {
4855         uint64_t offset, length, clientid;
4856         __be32 *p;
4857         uint32_t namelen, type;
4858
4859         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4860         if (unlikely(!p))
4861                 goto out_overflow;
4862         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4863         p = xdr_decode_hyper(p, &length);
4864         type = be32_to_cpup(p++); /* 4 byte read */
4865         if (fl != NULL) { /* manipulate file lock */
4866                 fl->fl_start = (loff_t)offset;
4867                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4868                 if (length == ~(uint64_t)0)
4869                         fl->fl_end = OFFSET_MAX;
4870                 fl->fl_type = F_WRLCK;
4871                 if (type & 1)
4872                         fl->fl_type = F_RDLCK;
4873                 fl->fl_pid = 0;
4874         }
4875         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4876         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4877         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4878         if (likely(p))
4879                 return -NFS4ERR_DENIED;
4880 out_overflow:
4881         print_overflow_msg(__func__, xdr);
4882         return -EIO;
4883 }
4884
4885 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4886 {
4887         int status;
4888
4889         status = decode_op_hdr(xdr, OP_LOCK);
4890         if (status == -EIO)
4891                 goto out;
4892         if (status == 0) {
4893                 status = decode_stateid(xdr, &res->stateid);
4894                 if (unlikely(status))
4895                         goto out;
4896         } else if (status == -NFS4ERR_DENIED)
4897                 status = decode_lock_denied(xdr, NULL);
4898         if (res->open_seqid != NULL)
4899                 nfs_increment_open_seqid(status, res->open_seqid);
4900         nfs_increment_lock_seqid(status, res->lock_seqid);
4901 out:
4902         return status;
4903 }
4904
4905 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4906 {
4907         int status;
4908         status = decode_op_hdr(xdr, OP_LOCKT);
4909         if (status == -NFS4ERR_DENIED)
4910                 return decode_lock_denied(xdr, res->denied);
4911         return status;
4912 }
4913
4914 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4915 {
4916         int status;
4917
4918         status = decode_op_hdr(xdr, OP_LOCKU);
4919         if (status != -EIO)
4920                 nfs_increment_lock_seqid(status, res->seqid);
4921         if (status == 0)
4922                 status = decode_stateid(xdr, &res->stateid);
4923         return status;
4924 }
4925
4926 static int decode_release_lockowner(struct xdr_stream *xdr)
4927 {
4928         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4929 }
4930
4931 static int decode_lookup(struct xdr_stream *xdr)
4932 {
4933         return decode_op_hdr(xdr, OP_LOOKUP);
4934 }
4935
4936 /* This is too sick! */
4937 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4938 {
4939         __be32 *p;
4940         uint32_t limit_type, nblocks, blocksize;
4941
4942         p = xdr_inline_decode(xdr, 12);
4943         if (unlikely(!p))
4944                 goto out_overflow;
4945         limit_type = be32_to_cpup(p++);
4946         switch (limit_type) {
4947         case 1:
4948                 xdr_decode_hyper(p, maxsize);
4949                 break;
4950         case 2:
4951                 nblocks = be32_to_cpup(p++);
4952                 blocksize = be32_to_cpup(p);
4953                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4954         }
4955         return 0;
4956 out_overflow:
4957         print_overflow_msg(__func__, xdr);
4958         return -EIO;
4959 }
4960
4961 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4962 {
4963         __be32 *p;
4964         uint32_t delegation_type;
4965         int status;
4966
4967         p = xdr_inline_decode(xdr, 4);
4968         if (unlikely(!p))
4969                 goto out_overflow;
4970         delegation_type = be32_to_cpup(p);
4971         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4972                 res->delegation_type = 0;
4973                 return 0;
4974         }
4975         status = decode_stateid(xdr, &res->delegation);
4976         if (unlikely(status))
4977                 return status;
4978         p = xdr_inline_decode(xdr, 4);
4979         if (unlikely(!p))
4980                 goto out_overflow;
4981         res->do_recall = be32_to_cpup(p);
4982
4983         switch (delegation_type) {
4984         case NFS4_OPEN_DELEGATE_READ:
4985                 res->delegation_type = FMODE_READ;
4986                 break;
4987         case NFS4_OPEN_DELEGATE_WRITE:
4988                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4989                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4990                                 return -EIO;
4991         }
4992         return decode_ace(xdr, NULL, res->server->nfs_client);
4993 out_overflow:
4994         print_overflow_msg(__func__, xdr);
4995         return -EIO;
4996 }
4997
4998 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4999 {
5000         __be32 *p;
5001         uint32_t savewords, bmlen, i;
5002         int status;
5003
5004         status = decode_op_hdr(xdr, OP_OPEN);
5005         if (status != -EIO)
5006                 nfs_increment_open_seqid(status, res->seqid);
5007         if (!status)
5008                 status = decode_stateid(xdr, &res->stateid);
5009         if (unlikely(status))
5010                 return status;
5011
5012         decode_change_info(xdr, &res->cinfo);
5013
5014         p = xdr_inline_decode(xdr, 8);
5015         if (unlikely(!p))
5016                 goto out_overflow;
5017         res->rflags = be32_to_cpup(p++);
5018         bmlen = be32_to_cpup(p);
5019         if (bmlen > 10)
5020                 goto xdr_error;
5021
5022         p = xdr_inline_decode(xdr, bmlen << 2);
5023         if (unlikely(!p))
5024                 goto out_overflow;
5025         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5026         for (i = 0; i < savewords; ++i)
5027                 res->attrset[i] = be32_to_cpup(p++);
5028         for (; i < NFS4_BITMAP_SIZE; i++)
5029                 res->attrset[i] = 0;
5030
5031         return decode_delegation(xdr, res);
5032 xdr_error:
5033         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5034         return -EIO;
5035 out_overflow:
5036         print_overflow_msg(__func__, xdr);
5037         return -EIO;
5038 }
5039
5040 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5041 {
5042         int status;
5043
5044         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5045         if (status != -EIO)
5046                 nfs_increment_open_seqid(status, res->seqid);
5047         if (!status)
5048                 status = decode_stateid(xdr, &res->stateid);
5049         return status;
5050 }
5051
5052 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5053 {
5054         int status;
5055
5056         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5057         if (status != -EIO)
5058                 nfs_increment_open_seqid(status, res->seqid);
5059         if (!status)
5060                 status = decode_stateid(xdr, &res->stateid);
5061         return status;
5062 }
5063
5064 static int decode_putfh(struct xdr_stream *xdr)
5065 {
5066         return decode_op_hdr(xdr, OP_PUTFH);
5067 }
5068
5069 static int decode_putrootfh(struct xdr_stream *xdr)
5070 {
5071         return decode_op_hdr(xdr, OP_PUTROOTFH);
5072 }
5073
5074 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5075 {
5076         __be32 *p;
5077         uint32_t count, eof, recvd;
5078         int status;
5079
5080         status = decode_op_hdr(xdr, OP_READ);
5081         if (status)
5082                 return status;
5083         p = xdr_inline_decode(xdr, 8);
5084         if (unlikely(!p))
5085                 goto out_overflow;
5086         eof = be32_to_cpup(p++);
5087         count = be32_to_cpup(p);
5088         recvd = xdr_read_pages(xdr, count);
5089         if (count > recvd) {
5090                 dprintk("NFS: server cheating in read reply: "
5091                                 "count %u > recvd %u\n", count, recvd);
5092                 count = recvd;
5093                 eof = 0;
5094         }
5095         res->eof = eof;
5096         res->count = count;
5097         return 0;
5098 out_overflow:
5099         print_overflow_msg(__func__, xdr);
5100         return -EIO;
5101 }
5102
5103 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5104 {
5105         int             status;
5106         __be32          verf[2];
5107
5108         status = decode_op_hdr(xdr, OP_READDIR);
5109         if (!status)
5110                 status = decode_verifier(xdr, readdir->verifier.data);
5111         if (unlikely(status))
5112                 return status;
5113         memcpy(verf, readdir->verifier.data, sizeof(verf));
5114         dprintk("%s: verifier = %08x:%08x\n",
5115                         __func__, verf[0], verf[1]);
5116         return xdr_read_pages(xdr, xdr->buf->page_len);
5117 }
5118
5119 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5120 {
5121         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5122         u32 len, recvd;
5123         __be32 *p;
5124         int status;
5125
5126         status = decode_op_hdr(xdr, OP_READLINK);
5127         if (status)
5128                 return status;
5129
5130         /* Convert length of symlink */
5131         p = xdr_inline_decode(xdr, 4);
5132         if (unlikely(!p))
5133                 goto out_overflow;
5134         len = be32_to_cpup(p);
5135         if (len >= rcvbuf->page_len || len <= 0) {
5136                 dprintk("nfs: server returned giant symlink!\n");
5137                 return -ENAMETOOLONG;
5138         }
5139         recvd = xdr_read_pages(xdr, len);
5140         if (recvd < len) {
5141                 dprintk("NFS: server cheating in readlink reply: "
5142                                 "count %u > recvd %u\n", len, recvd);
5143                 return -EIO;
5144         }
5145         /*
5146          * The XDR encode routine has set things up so that
5147          * the link text will be copied directly into the
5148          * buffer.  We just have to do overflow-checking,
5149          * and and null-terminate the text (the VFS expects
5150          * null-termination).
5151          */
5152         xdr_terminate_string(rcvbuf, len);
5153         return 0;
5154 out_overflow:
5155         print_overflow_msg(__func__, xdr);
5156         return -EIO;
5157 }
5158
5159 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5160 {
5161         int status;
5162
5163         status = decode_op_hdr(xdr, OP_REMOVE);
5164         if (status)
5165                 goto out;
5166         status = decode_change_info(xdr, cinfo);
5167 out:
5168         return status;
5169 }
5170
5171 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5172               struct nfs4_change_info *new_cinfo)
5173 {
5174         int status;
5175
5176         status = decode_op_hdr(xdr, OP_RENAME);
5177         if (status)
5178                 goto out;
5179         if ((status = decode_change_info(xdr, old_cinfo)))
5180                 goto out;
5181         status = decode_change_info(xdr, new_cinfo);
5182 out:
5183         return status;
5184 }
5185
5186 static int decode_renew(struct xdr_stream *xdr)
5187 {
5188         return decode_op_hdr(xdr, OP_RENEW);
5189 }
5190
5191 static int
5192 decode_restorefh(struct xdr_stream *xdr)
5193 {
5194         return decode_op_hdr(xdr, OP_RESTOREFH);
5195 }
5196
5197 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5198                          struct nfs_getaclres *res)
5199 {
5200         unsigned int savep;
5201         uint32_t attrlen,
5202                  bitmap[3] = {0};
5203         int status;
5204         unsigned int pg_offset;
5205
5206         res->acl_len = 0;
5207         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5208                 goto out;
5209
5210         xdr_enter_page(xdr, xdr->buf->page_len);
5211
5212         /* Calculate the offset of the page data */
5213         pg_offset = xdr->buf->head[0].iov_len;
5214
5215         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5216                 goto out;
5217         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5218                 goto out;
5219
5220         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5221                 return -EIO;
5222         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5223
5224                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5225                  * are stored with the acl data to handle the problem of
5226                  * variable length bitmaps.*/
5227                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5228                 res->acl_len = attrlen;
5229
5230                 /* Check for receive buffer overflow */
5231                 if (res->acl_len > (xdr->nwords << 2) ||
5232                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5233                         res->acl_flags |= NFS4_ACL_TRUNC;
5234                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5235                                         attrlen, xdr->nwords << 2);
5236                 }
5237         } else
5238                 status = -EOPNOTSUPP;
5239
5240 out:
5241         return status;
5242 }
5243
5244 static int
5245 decode_savefh(struct xdr_stream *xdr)
5246 {
5247         return decode_op_hdr(xdr, OP_SAVEFH);
5248 }
5249
5250 static int decode_setattr(struct xdr_stream *xdr)
5251 {
5252         __be32 *p;
5253         uint32_t bmlen;
5254         int status;
5255
5256         status = decode_op_hdr(xdr, OP_SETATTR);
5257         if (status)
5258                 return status;
5259         p = xdr_inline_decode(xdr, 4);
5260         if (unlikely(!p))
5261                 goto out_overflow;
5262         bmlen = be32_to_cpup(p);
5263         p = xdr_inline_decode(xdr, bmlen << 2);
5264         if (likely(p))
5265                 return 0;
5266 out_overflow:
5267         print_overflow_msg(__func__, xdr);
5268         return -EIO;
5269 }
5270
5271 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5272 {
5273         __be32 *p;
5274         uint32_t opnum;
5275         int32_t nfserr;
5276
5277         p = xdr_inline_decode(xdr, 8);
5278         if (unlikely(!p))
5279                 goto out_overflow;
5280         opnum = be32_to_cpup(p++);
5281         if (opnum != OP_SETCLIENTID) {
5282                 dprintk("nfs: decode_setclientid: Server returned operation"
5283                         " %d\n", opnum);
5284                 return -EIO;
5285         }
5286         nfserr = be32_to_cpup(p);
5287         if (nfserr == NFS_OK) {
5288                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5289                 if (unlikely(!p))
5290                         goto out_overflow;
5291                 p = xdr_decode_hyper(p, &res->clientid);
5292                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5293         } else if (nfserr == NFSERR_CLID_INUSE) {
5294                 uint32_t len;
5295
5296                 /* skip netid string */
5297                 p = xdr_inline_decode(xdr, 4);
5298                 if (unlikely(!p))
5299                         goto out_overflow;
5300                 len = be32_to_cpup(p);
5301                 p = xdr_inline_decode(xdr, len);
5302                 if (unlikely(!p))
5303                         goto out_overflow;
5304
5305                 /* skip uaddr string */
5306                 p = xdr_inline_decode(xdr, 4);
5307                 if (unlikely(!p))
5308                         goto out_overflow;
5309                 len = be32_to_cpup(p);
5310                 p = xdr_inline_decode(xdr, len);
5311                 if (unlikely(!p))
5312                         goto out_overflow;
5313                 return -NFSERR_CLID_INUSE;
5314         } else
5315                 return nfs4_stat_to_errno(nfserr);
5316
5317         return 0;
5318 out_overflow:
5319         print_overflow_msg(__func__, xdr);
5320         return -EIO;
5321 }
5322
5323 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5324 {
5325         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5326 }
5327
5328 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5329 {
5330         __be32 *p;
5331         int status;
5332
5333         status = decode_op_hdr(xdr, OP_WRITE);
5334         if (status)
5335                 return status;
5336
5337         p = xdr_inline_decode(xdr, 8);
5338         if (unlikely(!p))
5339                 goto out_overflow;
5340         res->count = be32_to_cpup(p++);
5341         res->verf->committed = be32_to_cpup(p++);
5342         return decode_write_verifier(xdr, &res->verf->verifier);
5343 out_overflow:
5344         print_overflow_msg(__func__, xdr);
5345         return -EIO;
5346 }
5347
5348 static int decode_delegreturn(struct xdr_stream *xdr)
5349 {
5350         return decode_op_hdr(xdr, OP_DELEGRETURN);
5351 }
5352
5353 static int decode_secinfo_gss(struct xdr_stream *xdr,
5354                               struct nfs4_secinfo4 *flavor)
5355 {
5356         u32 oid_len;
5357         __be32 *p;
5358
5359         p = xdr_inline_decode(xdr, 4);
5360         if (unlikely(!p))
5361                 goto out_overflow;
5362         oid_len = be32_to_cpup(p);
5363         if (oid_len > GSS_OID_MAX_LEN)
5364                 goto out_err;
5365
5366         p = xdr_inline_decode(xdr, oid_len);
5367         if (unlikely(!p))
5368                 goto out_overflow;
5369         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5370         flavor->flavor_info.oid.len = oid_len;
5371
5372         p = xdr_inline_decode(xdr, 8);
5373         if (unlikely(!p))
5374                 goto out_overflow;
5375         flavor->flavor_info.qop = be32_to_cpup(p++);
5376         flavor->flavor_info.service = be32_to_cpup(p);
5377
5378         return 0;
5379
5380 out_overflow:
5381         print_overflow_msg(__func__, xdr);
5382         return -EIO;
5383 out_err:
5384         return -EINVAL;
5385 }
5386
5387 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5388 {
5389         struct nfs4_secinfo4 *sec_flavor;
5390         unsigned int i, num_flavors;
5391         int status;
5392         __be32 *p;
5393
5394         p = xdr_inline_decode(xdr, 4);
5395         if (unlikely(!p))
5396                 goto out_overflow;
5397
5398         res->flavors->num_flavors = 0;
5399         num_flavors = be32_to_cpup(p);
5400
5401         for (i = 0; i < num_flavors; i++) {
5402                 sec_flavor = &res->flavors->flavors[i];
5403                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5404                         break;
5405
5406                 p = xdr_inline_decode(xdr, 4);
5407                 if (unlikely(!p))
5408                         goto out_overflow;
5409                 sec_flavor->flavor = be32_to_cpup(p);
5410
5411                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5412                         status = decode_secinfo_gss(xdr, sec_flavor);
5413                         if (status)
5414                                 goto out;
5415                 }
5416                 res->flavors->num_flavors++;
5417         }
5418
5419         status = 0;
5420 out:
5421         return status;
5422 out_overflow:
5423         print_overflow_msg(__func__, xdr);
5424         return -EIO;
5425 }
5426
5427 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5428 {
5429         int status = decode_op_hdr(xdr, OP_SECINFO);
5430         if (status)
5431                 return status;
5432         return decode_secinfo_common(xdr, res);
5433 }
5434
5435 #if defined(CONFIG_NFS_V4_1)
5436 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5437 {
5438         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5439         if (status)
5440                 return status;
5441         return decode_secinfo_common(xdr, res);
5442 }
5443
5444 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5445 {
5446         __be32 *p;
5447         uint32_t bitmap_words;
5448         unsigned int i;
5449
5450         p = xdr_inline_decode(xdr, 4);
5451         bitmap_words = be32_to_cpup(p++);
5452         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5453                 return -EIO;
5454         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5455         for (i = 0; i < bitmap_words; i++)
5456                 op_map->u.words[i] = be32_to_cpup(p++);
5457
5458         return 0;
5459 }
5460
5461 static int decode_exchange_id(struct xdr_stream *xdr,
5462                               struct nfs41_exchange_id_res *res)
5463 {
5464         __be32 *p;
5465         uint32_t dummy;
5466         char *dummy_str;
5467         int status;
5468         uint32_t impl_id_count;
5469
5470         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5471         if (status)
5472                 return status;
5473
5474         p = xdr_inline_decode(xdr, 8);
5475         if (unlikely(!p))
5476                 goto out_overflow;
5477         xdr_decode_hyper(p, &res->clientid);
5478         p = xdr_inline_decode(xdr, 12);
5479         if (unlikely(!p))
5480                 goto out_overflow;
5481         res->seqid = be32_to_cpup(p++);
5482         res->flags = be32_to_cpup(p++);
5483
5484         res->state_protect.how = be32_to_cpup(p);
5485         switch (res->state_protect.how) {
5486         case SP4_NONE:
5487                 break;
5488         case SP4_MACH_CRED:
5489                 status = decode_op_map(xdr, &res->state_protect.enforce);
5490                 if (status)
5491                         return status;
5492                 status = decode_op_map(xdr, &res->state_protect.allow);
5493                 if (status)
5494                         return status;
5495                 break;
5496         default:
5497                 WARN_ON_ONCE(1);
5498                 return -EIO;
5499         }
5500
5501         /* server_owner4.so_minor_id */
5502         p = xdr_inline_decode(xdr, 8);
5503         if (unlikely(!p))
5504                 goto out_overflow;
5505         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5506
5507         /* server_owner4.so_major_id */
5508         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5509         if (unlikely(status))
5510                 return status;
5511         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5512                 return -EIO;
5513         memcpy(res->server_owner->major_id, dummy_str, dummy);
5514         res->server_owner->major_id_sz = dummy;
5515
5516         /* server_scope4 */
5517         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5518         if (unlikely(status))
5519                 return status;
5520         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5521                 return -EIO;
5522         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5523         res->server_scope->server_scope_sz = dummy;
5524
5525         /* Implementation Id */
5526         p = xdr_inline_decode(xdr, 4);
5527         if (unlikely(!p))
5528                 goto out_overflow;
5529         impl_id_count = be32_to_cpup(p++);
5530
5531         if (impl_id_count) {
5532                 /* nii_domain */
5533                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5534                 if (unlikely(status))
5535                         return status;
5536                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5537                         return -EIO;
5538                 memcpy(res->impl_id->domain, dummy_str, dummy);
5539
5540                 /* nii_name */
5541                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5542                 if (unlikely(status))
5543                         return status;
5544                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5545                         return -EIO;
5546                 memcpy(res->impl_id->name, dummy_str, dummy);
5547
5548                 /* nii_date */
5549                 p = xdr_inline_decode(xdr, 12);
5550                 if (unlikely(!p))
5551                         goto out_overflow;
5552                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5553                 res->impl_id->date.nseconds = be32_to_cpup(p);
5554
5555                 /* if there's more than one entry, ignore the rest */
5556         }
5557         return 0;
5558 out_overflow:
5559         print_overflow_msg(__func__, xdr);
5560         return -EIO;
5561 }
5562
5563 static int decode_chan_attrs(struct xdr_stream *xdr,
5564                              struct nfs4_channel_attrs *attrs)
5565 {
5566         __be32 *p;
5567         u32 nr_attrs, val;
5568
5569         p = xdr_inline_decode(xdr, 28);
5570         if (unlikely(!p))
5571                 goto out_overflow;
5572         val = be32_to_cpup(p++);        /* headerpadsz */
5573         if (val)
5574                 return -EINVAL;         /* no support for header padding yet */
5575         attrs->max_rqst_sz = be32_to_cpup(p++);
5576         attrs->max_resp_sz = be32_to_cpup(p++);
5577         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5578         attrs->max_ops = be32_to_cpup(p++);
5579         attrs->max_reqs = be32_to_cpup(p++);
5580         nr_attrs = be32_to_cpup(p);
5581         if (unlikely(nr_attrs > 1)) {
5582                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5583                         "count %u\n", __func__, nr_attrs);
5584                 return -EINVAL;
5585         }
5586         if (nr_attrs == 1) {
5587                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5588                 if (unlikely(!p))
5589                         goto out_overflow;
5590         }
5591         return 0;
5592 out_overflow:
5593         print_overflow_msg(__func__, xdr);
5594         return -EIO;
5595 }
5596
5597 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5598 {
5599         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5600 }
5601
5602 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5603                                 struct nfs41_bind_conn_to_session_res *res)
5604 {
5605         __be32 *p;
5606         int status;
5607
5608         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5609         if (!status)
5610                 status = decode_sessionid(xdr, &res->session->sess_id);
5611         if (unlikely(status))
5612                 return status;
5613
5614         /* dir flags, rdma mode bool */
5615         p = xdr_inline_decode(xdr, 8);
5616         if (unlikely(!p))
5617                 goto out_overflow;
5618
5619         res->dir = be32_to_cpup(p++);
5620         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5621                 return -EIO;
5622         if (be32_to_cpup(p) == 0)
5623                 res->use_conn_in_rdma_mode = false;
5624         else
5625                 res->use_conn_in_rdma_mode = true;
5626
5627         return 0;
5628 out_overflow:
5629         print_overflow_msg(__func__, xdr);
5630         return -EIO;
5631 }
5632
5633 static int decode_create_session(struct xdr_stream *xdr,
5634                                  struct nfs41_create_session_res *res)
5635 {
5636         __be32 *p;
5637         int status;
5638         struct nfs_client *clp = res->client;
5639         struct nfs4_session *session = clp->cl_session;
5640
5641         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5642         if (!status)
5643                 status = decode_sessionid(xdr, &session->sess_id);
5644         if (unlikely(status))
5645                 return status;
5646
5647         /* seqid, flags */
5648         p = xdr_inline_decode(xdr, 8);
5649         if (unlikely(!p))
5650                 goto out_overflow;
5651         clp->cl_seqid = be32_to_cpup(p++);
5652         session->flags = be32_to_cpup(p);
5653
5654         /* Channel attributes */
5655         status = decode_chan_attrs(xdr, &session->fc_attrs);
5656         if (!status)
5657                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5658         return status;
5659 out_overflow:
5660         print_overflow_msg(__func__, xdr);
5661         return -EIO;
5662 }
5663
5664 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5665 {
5666         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5667 }
5668
5669 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5670 {
5671         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5672 }
5673
5674 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5675 {
5676         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5677 }
5678 #endif /* CONFIG_NFS_V4_1 */
5679
5680 static int decode_sequence(struct xdr_stream *xdr,
5681                            struct nfs4_sequence_res *res,
5682                            struct rpc_rqst *rqstp)
5683 {
5684 #if defined(CONFIG_NFS_V4_1)
5685         struct nfs4_session *session;
5686         struct nfs4_sessionid id;
5687         u32 dummy;
5688         int status;
5689         __be32 *p;
5690
5691         if (res->sr_slot == NULL)
5692                 return 0;
5693         if (!res->sr_slot->table->session)
5694                 return 0;
5695
5696         status = decode_op_hdr(xdr, OP_SEQUENCE);
5697         if (!status)
5698                 status = decode_sessionid(xdr, &id);
5699         if (unlikely(status))
5700                 goto out_err;
5701
5702         /*
5703          * If the server returns different values for sessionID, slotID or
5704          * sequence number, the server is looney tunes.
5705          */
5706         status = -EREMOTEIO;
5707         session = res->sr_slot->table->session;
5708
5709         if (memcmp(id.data, session->sess_id.data,
5710                    NFS4_MAX_SESSIONID_LEN)) {
5711                 dprintk("%s Invalid session id\n", __func__);
5712                 goto out_err;
5713         }
5714
5715         p = xdr_inline_decode(xdr, 20);
5716         if (unlikely(!p))
5717                 goto out_overflow;
5718
5719         /* seqid */
5720         dummy = be32_to_cpup(p++);
5721         if (dummy != res->sr_slot->seq_nr) {
5722                 dprintk("%s Invalid sequence number\n", __func__);
5723                 goto out_err;
5724         }
5725         /* slot id */
5726         dummy = be32_to_cpup(p++);
5727         if (dummy != res->sr_slot->slot_nr) {
5728                 dprintk("%s Invalid slot id\n", __func__);
5729                 goto out_err;
5730         }
5731         /* highest slot id */
5732         res->sr_highest_slotid = be32_to_cpup(p++);
5733         /* target highest slot id */
5734         res->sr_target_highest_slotid = be32_to_cpup(p++);
5735         /* result flags */
5736         res->sr_status_flags = be32_to_cpup(p);
5737         status = 0;
5738 out_err:
5739         res->sr_status = status;
5740         return status;
5741 out_overflow:
5742         print_overflow_msg(__func__, xdr);
5743         status = -EIO;
5744         goto out_err;
5745 #else  /* CONFIG_NFS_V4_1 */
5746         return 0;
5747 #endif /* CONFIG_NFS_V4_1 */
5748 }
5749
5750 #if defined(CONFIG_NFS_V4_1)
5751 /*
5752  * TODO: Need to handle case when EOF != true;
5753  */
5754 static int decode_getdevicelist(struct xdr_stream *xdr,
5755                                 struct pnfs_devicelist *res)
5756 {
5757         __be32 *p;
5758         int status, i;
5759         nfs4_verifier verftemp;
5760
5761         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5762         if (status)
5763                 return status;
5764
5765         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5766         if (unlikely(!p))
5767                 goto out_overflow;
5768
5769         /* TODO: Skip cookie for now */
5770         p += 2;
5771
5772         /* Read verifier */
5773         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5774
5775         res->num_devs = be32_to_cpup(p);
5776
5777         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5778
5779         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5780                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5781                                 __func__, res->num_devs);
5782                 return -EIO;
5783         }
5784
5785         p = xdr_inline_decode(xdr,
5786                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5787         if (unlikely(!p))
5788                 goto out_overflow;
5789         for (i = 0; i < res->num_devs; i++)
5790                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5791                                             NFS4_DEVICEID4_SIZE);
5792         res->eof = be32_to_cpup(p);
5793         return 0;
5794 out_overflow:
5795         print_overflow_msg(__func__, xdr);
5796         return -EIO;
5797 }
5798
5799 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5800                                 struct pnfs_device *pdev)
5801 {
5802         __be32 *p;
5803         uint32_t len, type;
5804         int status;
5805
5806         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5807         if (status) {
5808                 if (status == -ETOOSMALL) {
5809                         p = xdr_inline_decode(xdr, 4);
5810                         if (unlikely(!p))
5811                                 goto out_overflow;
5812                         pdev->mincount = be32_to_cpup(p);
5813                         dprintk("%s: Min count too small. mincnt = %u\n",
5814                                 __func__, pdev->mincount);
5815                 }
5816                 return status;
5817         }
5818
5819         p = xdr_inline_decode(xdr, 8);
5820         if (unlikely(!p))
5821                 goto out_overflow;
5822         type = be32_to_cpup(p++);
5823         if (type != pdev->layout_type) {
5824                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5825                         __func__, pdev->layout_type, type);
5826                 return -EINVAL;
5827         }
5828         /*
5829          * Get the length of the opaque device_addr4. xdr_read_pages places
5830          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5831          * and places the remaining xdr data in xdr_buf->tail
5832          */
5833         pdev->mincount = be32_to_cpup(p);
5834         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5835                 goto out_overflow;
5836
5837         /* Parse notification bitmap, verifying that it is zero. */
5838         p = xdr_inline_decode(xdr, 4);
5839         if (unlikely(!p))
5840                 goto out_overflow;
5841         len = be32_to_cpup(p);
5842         if (len) {
5843                 uint32_t i;
5844
5845                 p = xdr_inline_decode(xdr, 4 * len);
5846                 if (unlikely(!p))
5847                         goto out_overflow;
5848                 for (i = 0; i < len; i++, p++) {
5849                         if (be32_to_cpup(p)) {
5850                                 dprintk("%s: notifications not supported\n",
5851                                         __func__);
5852                                 return -EIO;
5853                         }
5854                 }
5855         }
5856         return 0;
5857 out_overflow:
5858         print_overflow_msg(__func__, xdr);
5859         return -EIO;
5860 }
5861
5862 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5863                             struct nfs4_layoutget_res *res)
5864 {
5865         __be32 *p;
5866         int status;
5867         u32 layout_count;
5868         u32 recvd;
5869
5870         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5871         if (status)
5872                 return status;
5873         p = xdr_inline_decode(xdr, 4);
5874         if (unlikely(!p))
5875                 goto out_overflow;
5876         res->return_on_close = be32_to_cpup(p);
5877         decode_stateid(xdr, &res->stateid);
5878         p = xdr_inline_decode(xdr, 4);
5879         if (unlikely(!p))
5880                 goto out_overflow;
5881         layout_count = be32_to_cpup(p);
5882         if (!layout_count) {
5883                 dprintk("%s: server responded with empty layout array\n",
5884                         __func__);
5885                 return -EINVAL;
5886         }
5887
5888         p = xdr_inline_decode(xdr, 28);
5889         if (unlikely(!p))
5890                 goto out_overflow;
5891         p = xdr_decode_hyper(p, &res->range.offset);
5892         p = xdr_decode_hyper(p, &res->range.length);
5893         res->range.iomode = be32_to_cpup(p++);
5894         res->type = be32_to_cpup(p++);
5895         res->layoutp->len = be32_to_cpup(p);
5896
5897         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5898                 __func__,
5899                 (unsigned long)res->range.offset,
5900                 (unsigned long)res->range.length,
5901                 res->range.iomode,
5902                 res->type,
5903                 res->layoutp->len);
5904
5905         recvd = xdr_read_pages(xdr, res->layoutp->len);
5906         if (res->layoutp->len > recvd) {
5907                 dprintk("NFS: server cheating in layoutget reply: "
5908                                 "layout len %u > recvd %u\n",
5909                                 res->layoutp->len, recvd);
5910                 return -EINVAL;
5911         }
5912
5913         if (layout_count > 1) {
5914                 /* We only handle a length one array at the moment.  Any
5915                  * further entries are just ignored.  Note that this means
5916                  * the client may see a response that is less than the
5917                  * minimum it requested.
5918                  */
5919                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5920                         __func__, layout_count);
5921         }
5922
5923         return 0;
5924 out_overflow:
5925         print_overflow_msg(__func__, xdr);
5926         return -EIO;
5927 }
5928
5929 static int decode_layoutreturn(struct xdr_stream *xdr,
5930                                struct nfs4_layoutreturn_res *res)
5931 {
5932         __be32 *p;
5933         int status;
5934
5935         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5936         if (status)
5937                 return status;
5938         p = xdr_inline_decode(xdr, 4);
5939         if (unlikely(!p))
5940                 goto out_overflow;
5941         res->lrs_present = be32_to_cpup(p);
5942         if (res->lrs_present)
5943                 status = decode_stateid(xdr, &res->stateid);
5944         return status;
5945 out_overflow:
5946         print_overflow_msg(__func__, xdr);
5947         return -EIO;
5948 }
5949
5950 static int decode_layoutcommit(struct xdr_stream *xdr,
5951                                struct rpc_rqst *req,
5952                                struct nfs4_layoutcommit_res *res)
5953 {
5954         __be32 *p;
5955         __u32 sizechanged;
5956         int status;
5957
5958         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5959         res->status = status;
5960         if (status)
5961                 return status;
5962
5963         p = xdr_inline_decode(xdr, 4);
5964         if (unlikely(!p))
5965                 goto out_overflow;
5966         sizechanged = be32_to_cpup(p);
5967
5968         if (sizechanged) {
5969                 /* throw away new size */
5970                 p = xdr_inline_decode(xdr, 8);
5971                 if (unlikely(!p))
5972                         goto out_overflow;
5973         }
5974         return 0;
5975 out_overflow:
5976         print_overflow_msg(__func__, xdr);
5977         return -EIO;
5978 }
5979
5980 static int decode_test_stateid(struct xdr_stream *xdr,
5981                                struct nfs41_test_stateid_res *res)
5982 {
5983         __be32 *p;
5984         int status;
5985         int num_res;
5986
5987         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5988         if (status)
5989                 return status;
5990
5991         p = xdr_inline_decode(xdr, 4);
5992         if (unlikely(!p))
5993                 goto out_overflow;
5994         num_res = be32_to_cpup(p++);
5995         if (num_res != 1)
5996                 goto out;
5997
5998         p = xdr_inline_decode(xdr, 4);
5999         if (unlikely(!p))
6000                 goto out_overflow;
6001         res->status = be32_to_cpup(p++);
6002
6003         return status;
6004 out_overflow:
6005         print_overflow_msg(__func__, xdr);
6006 out:
6007         return -EIO;
6008 }
6009
6010 static int decode_free_stateid(struct xdr_stream *xdr,
6011                                struct nfs41_free_stateid_res *res)
6012 {
6013         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6014         return res->status;
6015 }
6016 #endif /* CONFIG_NFS_V4_1 */
6017
6018 /*
6019  * END OF "GENERIC" DECODE ROUTINES.
6020  */
6021
6022 /*
6023  * Decode OPEN_DOWNGRADE response
6024  */
6025 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6026                                        struct xdr_stream *xdr,
6027                                        struct nfs_closeres *res)
6028 {
6029         struct compound_hdr hdr;
6030         int status;
6031
6032         status = decode_compound_hdr(xdr, &hdr);
6033         if (status)
6034                 goto out;
6035         status = decode_sequence(xdr, &res->seq_res, rqstp);
6036         if (status)
6037                 goto out;
6038         status = decode_putfh(xdr);
6039         if (status)
6040                 goto out;
6041         status = decode_open_downgrade(xdr, res);
6042         if (status != 0)
6043                 goto out;
6044         decode_getfattr(xdr, res->fattr, res->server);
6045 out:
6046         return status;
6047 }
6048
6049 /*
6050  * Decode ACCESS response
6051  */
6052 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6053                                struct nfs4_accessres *res)
6054 {
6055         struct compound_hdr hdr;
6056         int status;
6057
6058         status = decode_compound_hdr(xdr, &hdr);
6059         if (status)
6060                 goto out;
6061         status = decode_sequence(xdr, &res->seq_res, rqstp);
6062         if (status)
6063                 goto out;
6064         status = decode_putfh(xdr);
6065         if (status != 0)
6066                 goto out;
6067         status = decode_access(xdr, &res->supported, &res->access);
6068         if (status != 0)
6069                 goto out;
6070         decode_getfattr(xdr, res->fattr, res->server);
6071 out:
6072         return status;
6073 }
6074
6075 /*
6076  * Decode LOOKUP response
6077  */
6078 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6079                                struct nfs4_lookup_res *res)
6080 {
6081         struct compound_hdr hdr;
6082         int status;
6083
6084         status = decode_compound_hdr(xdr, &hdr);
6085         if (status)
6086                 goto out;
6087         status = decode_sequence(xdr, &res->seq_res, rqstp);
6088         if (status)
6089                 goto out;
6090         status = decode_putfh(xdr);
6091         if (status)
6092                 goto out;
6093         status = decode_lookup(xdr);
6094         if (status)
6095                 goto out;
6096         status = decode_getfh(xdr, res->fh);
6097         if (status)
6098                 goto out;
6099         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6100 out:
6101         return status;
6102 }
6103
6104 /*
6105  * Decode LOOKUP_ROOT response
6106  */
6107 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6108                                     struct xdr_stream *xdr,
6109                                     struct nfs4_lookup_res *res)
6110 {
6111         struct compound_hdr hdr;
6112         int status;
6113
6114         status = decode_compound_hdr(xdr, &hdr);
6115         if (status)
6116                 goto out;
6117         status = decode_sequence(xdr, &res->seq_res, rqstp);
6118         if (status)
6119                 goto out;
6120         status = decode_putrootfh(xdr);
6121         if (status)
6122                 goto out;
6123         status = decode_getfh(xdr, res->fh);
6124         if (status == 0)
6125                 status = decode_getfattr_label(xdr, res->fattr,
6126                                                 res->label, res->server);
6127 out:
6128         return status;
6129 }
6130
6131 /*
6132  * Decode REMOVE response
6133  */
6134 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6135                                struct nfs_removeres *res)
6136 {
6137         struct compound_hdr hdr;
6138         int status;
6139
6140         status = decode_compound_hdr(xdr, &hdr);
6141         if (status)
6142                 goto out;
6143         status = decode_sequence(xdr, &res->seq_res, rqstp);
6144         if (status)
6145                 goto out;
6146         status = decode_putfh(xdr);
6147         if (status)
6148                 goto out;
6149         status = decode_remove(xdr, &res->cinfo);
6150 out:
6151         return status;
6152 }
6153
6154 /*
6155  * Decode RENAME response
6156  */
6157 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6158                                struct nfs_renameres *res)
6159 {
6160         struct compound_hdr hdr;
6161         int status;
6162
6163         status = decode_compound_hdr(xdr, &hdr);
6164         if (status)
6165                 goto out;
6166         status = decode_sequence(xdr, &res->seq_res, rqstp);
6167         if (status)
6168                 goto out;
6169         status = decode_putfh(xdr);
6170         if (status)
6171                 goto out;
6172         status = decode_savefh(xdr);
6173         if (status)
6174                 goto out;
6175         status = decode_putfh(xdr);
6176         if (status)
6177                 goto out;
6178         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6179 out:
6180         return status;
6181 }
6182
6183 /*
6184  * Decode LINK response
6185  */
6186 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6187                              struct nfs4_link_res *res)
6188 {
6189         struct compound_hdr hdr;
6190         int status;
6191
6192         status = decode_compound_hdr(xdr, &hdr);
6193         if (status)
6194                 goto out;
6195         status = decode_sequence(xdr, &res->seq_res, rqstp);
6196         if (status)
6197                 goto out;
6198         status = decode_putfh(xdr);
6199         if (status)
6200                 goto out;
6201         status = decode_savefh(xdr);
6202         if (status)
6203                 goto out;
6204         status = decode_putfh(xdr);
6205         if (status)
6206                 goto out;
6207         status = decode_link(xdr, &res->cinfo);
6208         if (status)
6209                 goto out;
6210         /*
6211          * Note order: OP_LINK leaves the directory as the current
6212          *             filehandle.
6213          */
6214         status = decode_restorefh(xdr);
6215         if (status)
6216                 goto out;
6217         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6218 out:
6219         return status;
6220 }
6221
6222 /*
6223  * Decode CREATE response
6224  */
6225 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226                                struct nfs4_create_res *res)
6227 {
6228         struct compound_hdr hdr;
6229         int status;
6230
6231         status = decode_compound_hdr(xdr, &hdr);
6232         if (status)
6233                 goto out;
6234         status = decode_sequence(xdr, &res->seq_res, rqstp);
6235         if (status)
6236                 goto out;
6237         status = decode_putfh(xdr);
6238         if (status)
6239                 goto out;
6240         status = decode_create(xdr, &res->dir_cinfo);
6241         if (status)
6242                 goto out;
6243         status = decode_getfh(xdr, res->fh);
6244         if (status)
6245                 goto out;
6246         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6247 out:
6248         return status;
6249 }
6250
6251 /*
6252  * Decode SYMLINK response
6253  */
6254 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6255                                 struct nfs4_create_res *res)
6256 {
6257         return nfs4_xdr_dec_create(rqstp, xdr, res);
6258 }
6259
6260 /*
6261  * Decode GETATTR response
6262  */
6263 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264                                 struct nfs4_getattr_res *res)
6265 {
6266         struct compound_hdr hdr;
6267         int status;
6268
6269         status = decode_compound_hdr(xdr, &hdr);
6270         if (status)
6271                 goto out;
6272         status = decode_sequence(xdr, &res->seq_res, rqstp);
6273         if (status)
6274                 goto out;
6275         status = decode_putfh(xdr);
6276         if (status)
6277                 goto out;
6278         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6279 out:
6280         return status;
6281 }
6282
6283 /*
6284  * Encode an SETACL request
6285  */
6286 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6287                                 struct nfs_setaclargs *args)
6288 {
6289         struct compound_hdr hdr = {
6290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6291         };
6292
6293         encode_compound_hdr(xdr, req, &hdr);
6294         encode_sequence(xdr, &args->seq_args, &hdr);
6295         encode_putfh(xdr, args->fh, &hdr);
6296         encode_setacl(xdr, args, &hdr);
6297         encode_nops(&hdr);
6298 }
6299
6300 /*
6301  * Decode SETACL response
6302  */
6303 static int
6304 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6305                     struct nfs_setaclres *res)
6306 {
6307         struct compound_hdr hdr;
6308         int status;
6309
6310         status = decode_compound_hdr(xdr, &hdr);
6311         if (status)
6312                 goto out;
6313         status = decode_sequence(xdr, &res->seq_res, rqstp);
6314         if (status)
6315                 goto out;
6316         status = decode_putfh(xdr);
6317         if (status)
6318                 goto out;
6319         status = decode_setattr(xdr);
6320 out:
6321         return status;
6322 }
6323
6324 /*
6325  * Decode GETACL response
6326  */
6327 static int
6328 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329                     struct nfs_getaclres *res)
6330 {
6331         struct compound_hdr hdr;
6332         int status;
6333
6334         if (res->acl_scratch != NULL) {
6335                 void *p = page_address(res->acl_scratch);
6336                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6337         }
6338         status = decode_compound_hdr(xdr, &hdr);
6339         if (status)
6340                 goto out;
6341         status = decode_sequence(xdr, &res->seq_res, rqstp);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_getacl(xdr, rqstp, res);
6348
6349 out:
6350         return status;
6351 }
6352
6353 /*
6354  * Decode CLOSE response
6355  */
6356 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6357                               struct nfs_closeres *res)
6358 {
6359         struct compound_hdr hdr;
6360         int status;
6361
6362         status = decode_compound_hdr(xdr, &hdr);
6363         if (status)
6364                 goto out;
6365         status = decode_sequence(xdr, &res->seq_res, rqstp);
6366         if (status)
6367                 goto out;
6368         status = decode_putfh(xdr);
6369         if (status)
6370                 goto out;
6371         status = decode_close(xdr, res);
6372         if (status != 0)
6373                 goto out;
6374         /*
6375          * Note: Server may do delete on close for this file
6376          *      in which case the getattr call will fail with
6377          *      an ESTALE error. Shouldn't be a problem,
6378          *      though, since fattr->valid will remain unset.
6379          */
6380         decode_getfattr(xdr, res->fattr, res->server);
6381 out:
6382         return status;
6383 }
6384
6385 /*
6386  * Decode OPEN response
6387  */
6388 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6389                              struct nfs_openres *res)
6390 {
6391         struct compound_hdr hdr;
6392         int status;
6393
6394         status = decode_compound_hdr(xdr, &hdr);
6395         if (status)
6396                 goto out;
6397         status = decode_sequence(xdr, &res->seq_res, rqstp);
6398         if (status)
6399                 goto out;
6400         status = decode_putfh(xdr);
6401         if (status)
6402                 goto out;
6403         status = decode_open(xdr, res);
6404         if (status)
6405                 goto out;
6406         status = decode_getfh(xdr, &res->fh);
6407         if (status)
6408                 goto out;
6409         if (res->access_request)
6410                 decode_access(xdr, &res->access_supported, &res->access_result);
6411         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6412 out:
6413         return status;
6414 }
6415
6416 /*
6417  * Decode OPEN_CONFIRM response
6418  */
6419 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6420                                      struct xdr_stream *xdr,
6421                                      struct nfs_open_confirmres *res)
6422 {
6423         struct compound_hdr hdr;
6424         int status;
6425
6426         status = decode_compound_hdr(xdr, &hdr);
6427         if (status)
6428                 goto out;
6429         status = decode_putfh(xdr);
6430         if (status)
6431                 goto out;
6432         status = decode_open_confirm(xdr, res);
6433 out:
6434         return status;
6435 }
6436
6437 /*
6438  * Decode OPEN response
6439  */
6440 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6441                                     struct xdr_stream *xdr,
6442                                     struct nfs_openres *res)
6443 {
6444         struct compound_hdr hdr;
6445         int status;
6446
6447         status = decode_compound_hdr(xdr, &hdr);
6448         if (status)
6449                 goto out;
6450         status = decode_sequence(xdr, &res->seq_res, rqstp);
6451         if (status)
6452                 goto out;
6453         status = decode_putfh(xdr);
6454         if (status)
6455                 goto out;
6456         status = decode_open(xdr, res);
6457         if (status)
6458                 goto out;
6459         if (res->access_request)
6460                 decode_access(xdr, &res->access_supported, &res->access_result);
6461         decode_getfattr(xdr, res->f_attr, res->server);
6462 out:
6463         return status;
6464 }
6465
6466 /*
6467  * Decode SETATTR response
6468  */
6469 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6470                                 struct xdr_stream *xdr,
6471                                 struct nfs_setattrres *res)
6472 {
6473         struct compound_hdr hdr;
6474         int status;
6475
6476         status = decode_compound_hdr(xdr, &hdr);
6477         if (status)
6478                 goto out;
6479         status = decode_sequence(xdr, &res->seq_res, rqstp);
6480         if (status)
6481                 goto out;
6482         status = decode_putfh(xdr);
6483         if (status)
6484                 goto out;
6485         status = decode_setattr(xdr);
6486         if (status)
6487                 goto out;
6488         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6489 out:
6490         return status;
6491 }
6492
6493 /*
6494  * Decode LOCK response
6495  */
6496 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6497                              struct nfs_lock_res *res)
6498 {
6499         struct compound_hdr hdr;
6500         int status;
6501
6502         status = decode_compound_hdr(xdr, &hdr);
6503         if (status)
6504                 goto out;
6505         status = decode_sequence(xdr, &res->seq_res, rqstp);
6506         if (status)
6507                 goto out;
6508         status = decode_putfh(xdr);
6509         if (status)
6510                 goto out;
6511         status = decode_lock(xdr, res);
6512 out:
6513         return status;
6514 }
6515
6516 /*
6517  * Decode LOCKT response
6518  */
6519 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6520                               struct nfs_lockt_res *res)
6521 {
6522         struct compound_hdr hdr;
6523         int status;
6524
6525         status = decode_compound_hdr(xdr, &hdr);
6526         if (status)
6527                 goto out;
6528         status = decode_sequence(xdr, &res->seq_res, rqstp);
6529         if (status)
6530                 goto out;
6531         status = decode_putfh(xdr);
6532         if (status)
6533                 goto out;
6534         status = decode_lockt(xdr, res);
6535 out:
6536         return status;
6537 }
6538
6539 /*
6540  * Decode LOCKU response
6541  */
6542 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6543                               struct nfs_locku_res *res)
6544 {
6545         struct compound_hdr hdr;
6546         int status;
6547
6548         status = decode_compound_hdr(xdr, &hdr);
6549         if (status)
6550                 goto out;
6551         status = decode_sequence(xdr, &res->seq_res, rqstp);
6552         if (status)
6553                 goto out;
6554         status = decode_putfh(xdr);
6555         if (status)
6556                 goto out;
6557         status = decode_locku(xdr, res);
6558 out:
6559         return status;
6560 }
6561
6562 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6563                                           struct xdr_stream *xdr, void *dummy)
6564 {
6565         struct compound_hdr hdr;
6566         int status;
6567
6568         status = decode_compound_hdr(xdr, &hdr);
6569         if (!status)
6570                 status = decode_release_lockowner(xdr);
6571         return status;
6572 }
6573
6574 /*
6575  * Decode READLINK response
6576  */
6577 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6578                                  struct xdr_stream *xdr,
6579                                  struct nfs4_readlink_res *res)
6580 {
6581         struct compound_hdr hdr;
6582         int status;
6583
6584         status = decode_compound_hdr(xdr, &hdr);
6585         if (status)
6586                 goto out;
6587         status = decode_sequence(xdr, &res->seq_res, rqstp);
6588         if (status)
6589                 goto out;
6590         status = decode_putfh(xdr);
6591         if (status)
6592                 goto out;
6593         status = decode_readlink(xdr, rqstp);
6594 out:
6595         return status;
6596 }
6597
6598 /*
6599  * Decode READDIR response
6600  */
6601 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602                                 struct nfs4_readdir_res *res)
6603 {
6604         struct compound_hdr hdr;
6605         int status;
6606
6607         status = decode_compound_hdr(xdr, &hdr);
6608         if (status)
6609                 goto out;
6610         status = decode_sequence(xdr, &res->seq_res, rqstp);
6611         if (status)
6612                 goto out;
6613         status = decode_putfh(xdr);
6614         if (status)
6615                 goto out;
6616         status = decode_readdir(xdr, rqstp, res);
6617 out:
6618         return status;
6619 }
6620
6621 /*
6622  * Decode Read response
6623  */
6624 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6625                              struct nfs_readres *res)
6626 {
6627         struct compound_hdr hdr;
6628         int status;
6629
6630         status = decode_compound_hdr(xdr, &hdr);
6631         if (status)
6632                 goto out;
6633         status = decode_sequence(xdr, &res->seq_res, rqstp);
6634         if (status)
6635                 goto out;
6636         status = decode_putfh(xdr);
6637         if (status)
6638                 goto out;
6639         status = decode_read(xdr, rqstp, res);
6640         if (!status)
6641                 status = res->count;
6642 out:
6643         return status;
6644 }
6645
6646 /*
6647  * Decode WRITE response
6648  */
6649 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6650                               struct nfs_writeres *res)
6651 {
6652         struct compound_hdr hdr;
6653         int status;
6654
6655         status = decode_compound_hdr(xdr, &hdr);
6656         if (status)
6657                 goto out;
6658         status = decode_sequence(xdr, &res->seq_res, rqstp);
6659         if (status)
6660                 goto out;
6661         status = decode_putfh(xdr);
6662         if (status)
6663                 goto out;
6664         status = decode_write(xdr, res);
6665         if (status)
6666                 goto out;
6667         if (res->fattr)
6668                 decode_getfattr(xdr, res->fattr, res->server);
6669         if (!status)
6670                 status = res->count;
6671 out:
6672         return status;
6673 }
6674
6675 /*
6676  * Decode COMMIT response
6677  */
6678 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6679                                struct nfs_commitres *res)
6680 {
6681         struct compound_hdr hdr;
6682         int status;
6683
6684         status = decode_compound_hdr(xdr, &hdr);
6685         if (status)
6686                 goto out;
6687         status = decode_sequence(xdr, &res->seq_res, rqstp);
6688         if (status)
6689                 goto out;
6690         status = decode_putfh(xdr);
6691         if (status)
6692                 goto out;
6693         status = decode_commit(xdr, res);
6694 out:
6695         return status;
6696 }
6697
6698 /*
6699  * Decode FSINFO response
6700  */
6701 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6702                                struct nfs4_fsinfo_res *res)
6703 {
6704         struct compound_hdr hdr;
6705         int status;
6706
6707         status = decode_compound_hdr(xdr, &hdr);
6708         if (!status)
6709                 status = decode_sequence(xdr, &res->seq_res, req);
6710         if (!status)
6711                 status = decode_putfh(xdr);
6712         if (!status)
6713                 status = decode_fsinfo(xdr, res->fsinfo);
6714         return status;
6715 }
6716
6717 /*
6718  * Decode PATHCONF response
6719  */
6720 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6721                                  struct nfs4_pathconf_res *res)
6722 {
6723         struct compound_hdr hdr;
6724         int status;
6725
6726         status = decode_compound_hdr(xdr, &hdr);
6727         if (!status)
6728                 status = decode_sequence(xdr, &res->seq_res, req);
6729         if (!status)
6730                 status = decode_putfh(xdr);
6731         if (!status)
6732                 status = decode_pathconf(xdr, res->pathconf);
6733         return status;
6734 }
6735
6736 /*
6737  * Decode STATFS response
6738  */
6739 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6740                                struct nfs4_statfs_res *res)
6741 {
6742         struct compound_hdr hdr;
6743         int status;
6744
6745         status = decode_compound_hdr(xdr, &hdr);
6746         if (!status)
6747                 status = decode_sequence(xdr, &res->seq_res, req);
6748         if (!status)
6749                 status = decode_putfh(xdr);
6750         if (!status)
6751                 status = decode_statfs(xdr, res->fsstat);
6752         return status;
6753 }
6754
6755 /*
6756  * Decode GETATTR_BITMAP response
6757  */
6758 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6759                                     struct xdr_stream *xdr,
6760                                     struct nfs4_server_caps_res *res)
6761 {
6762         struct compound_hdr hdr;
6763         int status;
6764
6765         status = decode_compound_hdr(xdr, &hdr);
6766         if (status)
6767                 goto out;
6768         status = decode_sequence(xdr, &res->seq_res, req);
6769         if (status)
6770                 goto out;
6771         status = decode_putfh(xdr);
6772         if (status)
6773                 goto out;
6774         status = decode_server_caps(xdr, res);
6775 out:
6776         return status;
6777 }
6778
6779 /*
6780  * Decode RENEW response
6781  */
6782 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6783                               void *__unused)
6784 {
6785         struct compound_hdr hdr;
6786         int status;
6787
6788         status = decode_compound_hdr(xdr, &hdr);
6789         if (!status)
6790                 status = decode_renew(xdr);
6791         return status;
6792 }
6793
6794 /*
6795  * Decode SETCLIENTID response
6796  */
6797 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6798                                     struct xdr_stream *xdr,
6799                                     struct nfs4_setclientid_res *res)
6800 {
6801         struct compound_hdr hdr;
6802         int status;
6803
6804         status = decode_compound_hdr(xdr, &hdr);
6805         if (!status)
6806                 status = decode_setclientid(xdr, res);
6807         return status;
6808 }
6809
6810 /*
6811  * Decode SETCLIENTID_CONFIRM response
6812  */
6813 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6814                                             struct xdr_stream *xdr)
6815 {
6816         struct compound_hdr hdr;
6817         int status;
6818
6819         status = decode_compound_hdr(xdr, &hdr);
6820         if (!status)
6821                 status = decode_setclientid_confirm(xdr);
6822         return status;
6823 }
6824
6825 /*
6826  * Decode DELEGRETURN response
6827  */
6828 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6829                                     struct xdr_stream *xdr,
6830                                     struct nfs4_delegreturnres *res)
6831 {
6832         struct compound_hdr hdr;
6833         int status;
6834
6835         status = decode_compound_hdr(xdr, &hdr);
6836         if (status)
6837                 goto out;
6838         status = decode_sequence(xdr, &res->seq_res, rqstp);
6839         if (status)
6840                 goto out;
6841         status = decode_putfh(xdr);
6842         if (status != 0)
6843                 goto out;
6844         status = decode_getfattr(xdr, res->fattr, res->server);
6845         if (status != 0)
6846                 goto out;
6847         status = decode_delegreturn(xdr);
6848 out:
6849         return status;
6850 }
6851
6852 /*
6853  * Decode FS_LOCATIONS response
6854  */
6855 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6856                                      struct xdr_stream *xdr,
6857                                      struct nfs4_fs_locations_res *res)
6858 {
6859         struct compound_hdr hdr;
6860         int status;
6861
6862         status = decode_compound_hdr(xdr, &hdr);
6863         if (status)
6864                 goto out;
6865         status = decode_sequence(xdr, &res->seq_res, req);
6866         if (status)
6867                 goto out;
6868         status = decode_putfh(xdr);
6869         if (status)
6870                 goto out;
6871         if (res->migration) {
6872                 xdr_enter_page(xdr, PAGE_SIZE);
6873                 status = decode_getfattr_generic(xdr,
6874                                         &res->fs_locations->fattr,
6875                                          NULL, res->fs_locations,
6876                                          NULL, res->fs_locations->server);
6877                 if (status)
6878                         goto out;
6879                 if (res->renew)
6880                         status = decode_renew(xdr);
6881         } else {
6882                 status = decode_lookup(xdr);
6883                 if (status)
6884                         goto out;
6885                 xdr_enter_page(xdr, PAGE_SIZE);
6886                 status = decode_getfattr_generic(xdr,
6887                                         &res->fs_locations->fattr,
6888                                          NULL, res->fs_locations,
6889                                          NULL, res->fs_locations->server);
6890         }
6891 out:
6892         return status;
6893 }
6894
6895 /*
6896  * Decode SECINFO response
6897  */
6898 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6899                                 struct xdr_stream *xdr,
6900                                 struct nfs4_secinfo_res *res)
6901 {
6902         struct compound_hdr hdr;
6903         int status;
6904
6905         status = decode_compound_hdr(xdr, &hdr);
6906         if (status)
6907                 goto out;
6908         status = decode_sequence(xdr, &res->seq_res, rqstp);
6909         if (status)
6910                 goto out;
6911         status = decode_putfh(xdr);
6912         if (status)
6913                 goto out;
6914         status = decode_secinfo(xdr, res);
6915 out:
6916         return status;
6917 }
6918
6919 /*
6920  * Decode FSID_PRESENT response
6921  */
6922 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6923                                      struct xdr_stream *xdr,
6924                                      struct nfs4_fsid_present_res *res)
6925 {
6926         struct compound_hdr hdr;
6927         int status;
6928
6929         status = decode_compound_hdr(xdr, &hdr);
6930         if (status)
6931                 goto out;
6932         status = decode_sequence(xdr, &res->seq_res, rqstp);
6933         if (status)
6934                 goto out;
6935         status = decode_putfh(xdr);
6936         if (status)
6937                 goto out;
6938         status = decode_getfh(xdr, res->fh);
6939         if (status)
6940                 goto out;
6941         if (res->renew)
6942                 status = decode_renew(xdr);
6943 out:
6944         return status;
6945 }
6946
6947 #if defined(CONFIG_NFS_V4_1)
6948 /*
6949  * Decode BIND_CONN_TO_SESSION response
6950  */
6951 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6952                                         struct xdr_stream *xdr,
6953                                         void *res)
6954 {
6955         struct compound_hdr hdr;
6956         int status;
6957
6958         status = decode_compound_hdr(xdr, &hdr);
6959         if (!status)
6960                 status = decode_bind_conn_to_session(xdr, res);
6961         return status;
6962 }
6963
6964 /*
6965  * Decode EXCHANGE_ID response
6966  */
6967 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6968                                     struct xdr_stream *xdr,
6969                                     void *res)
6970 {
6971         struct compound_hdr hdr;
6972         int status;
6973
6974         status = decode_compound_hdr(xdr, &hdr);
6975         if (!status)
6976                 status = decode_exchange_id(xdr, res);
6977         return status;
6978 }
6979
6980 /*
6981  * Decode CREATE_SESSION response
6982  */
6983 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6984                                        struct xdr_stream *xdr,
6985                                        struct nfs41_create_session_res *res)
6986 {
6987         struct compound_hdr hdr;
6988         int status;
6989
6990         status = decode_compound_hdr(xdr, &hdr);
6991         if (!status)
6992                 status = decode_create_session(xdr, res);
6993         return status;
6994 }
6995
6996 /*
6997  * Decode DESTROY_SESSION response
6998  */
6999 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7000                                         struct xdr_stream *xdr,
7001                                         void *res)
7002 {
7003         struct compound_hdr hdr;
7004         int status;
7005
7006         status = decode_compound_hdr(xdr, &hdr);
7007         if (!status)
7008                 status = decode_destroy_session(xdr, res);
7009         return status;
7010 }
7011
7012 /*
7013  * Decode DESTROY_CLIENTID response
7014  */
7015 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7016                                         struct xdr_stream *xdr,
7017                                         void *res)
7018 {
7019         struct compound_hdr hdr;
7020         int status;
7021
7022         status = decode_compound_hdr(xdr, &hdr);
7023         if (!status)
7024                 status = decode_destroy_clientid(xdr, res);
7025         return status;
7026 }
7027
7028 /*
7029  * Decode SEQUENCE response
7030  */
7031 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7032                                  struct xdr_stream *xdr,
7033                                  struct nfs4_sequence_res *res)
7034 {
7035         struct compound_hdr hdr;
7036         int status;
7037
7038         status = decode_compound_hdr(xdr, &hdr);
7039         if (!status)
7040                 status = decode_sequence(xdr, res, rqstp);
7041         return status;
7042 }
7043
7044 /*
7045  * Decode GET_LEASE_TIME response
7046  */
7047 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7048                                        struct xdr_stream *xdr,
7049                                        struct nfs4_get_lease_time_res *res)
7050 {
7051         struct compound_hdr hdr;
7052         int status;
7053
7054         status = decode_compound_hdr(xdr, &hdr);
7055         if (!status)
7056                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7057         if (!status)
7058                 status = decode_putrootfh(xdr);
7059         if (!status)
7060                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7061         return status;
7062 }
7063
7064 /*
7065  * Decode RECLAIM_COMPLETE response
7066  */
7067 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7068                                          struct xdr_stream *xdr,
7069                                          struct nfs41_reclaim_complete_res *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7077         if (!status)
7078                 status = decode_reclaim_complete(xdr, (void *)NULL);
7079         return status;
7080 }
7081
7082 /*
7083  * Decode GETDEVICELIST response
7084  */
7085 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7086                                       struct xdr_stream *xdr,
7087                                       struct nfs4_getdevicelist_res *res)
7088 {
7089         struct compound_hdr hdr;
7090         int status;
7091
7092         dprintk("encoding getdevicelist!\n");
7093
7094         status = decode_compound_hdr(xdr, &hdr);
7095         if (status != 0)
7096                 goto out;
7097         status = decode_sequence(xdr, &res->seq_res, rqstp);
7098         if (status != 0)
7099                 goto out;
7100         status = decode_putfh(xdr);
7101         if (status != 0)
7102                 goto out;
7103         status = decode_getdevicelist(xdr, res->devlist);
7104 out:
7105         return status;
7106 }
7107
7108 /*
7109  * Decode GETDEVINFO response
7110  */
7111 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7112                                       struct xdr_stream *xdr,
7113                                       struct nfs4_getdeviceinfo_res *res)
7114 {
7115         struct compound_hdr hdr;
7116         int status;
7117
7118         status = decode_compound_hdr(xdr, &hdr);
7119         if (status != 0)
7120                 goto out;
7121         status = decode_sequence(xdr, &res->seq_res, rqstp);
7122         if (status != 0)
7123                 goto out;
7124         status = decode_getdeviceinfo(xdr, res->pdev);
7125 out:
7126         return status;
7127 }
7128
7129 /*
7130  * Decode LAYOUTGET response
7131  */
7132 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7133                                   struct xdr_stream *xdr,
7134                                   struct nfs4_layoutget_res *res)
7135 {
7136         struct compound_hdr hdr;
7137         int status;
7138
7139         status = decode_compound_hdr(xdr, &hdr);
7140         if (status)
7141                 goto out;
7142         status = decode_sequence(xdr, &res->seq_res, rqstp);
7143         if (status)
7144                 goto out;
7145         status = decode_putfh(xdr);
7146         if (status)
7147                 goto out;
7148         status = decode_layoutget(xdr, rqstp, res);
7149 out:
7150         return status;
7151 }
7152
7153 /*
7154  * Decode LAYOUTRETURN response
7155  */
7156 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7157                                      struct xdr_stream *xdr,
7158                                      struct nfs4_layoutreturn_res *res)
7159 {
7160         struct compound_hdr hdr;
7161         int status;
7162
7163         status = decode_compound_hdr(xdr, &hdr);
7164         if (status)
7165                 goto out;
7166         status = decode_sequence(xdr, &res->seq_res, rqstp);
7167         if (status)
7168                 goto out;
7169         status = decode_putfh(xdr);
7170         if (status)
7171                 goto out;
7172         status = decode_layoutreturn(xdr, res);
7173 out:
7174         return status;
7175 }
7176
7177 /*
7178  * Decode LAYOUTCOMMIT response
7179  */
7180 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7181                                      struct xdr_stream *xdr,
7182                                      struct nfs4_layoutcommit_res *res)
7183 {
7184         struct compound_hdr hdr;
7185         int status;
7186
7187         status = decode_compound_hdr(xdr, &hdr);
7188         if (status)
7189                 goto out;
7190         status = decode_sequence(xdr, &res->seq_res, rqstp);
7191         if (status)
7192                 goto out;
7193         status = decode_putfh(xdr);
7194         if (status)
7195                 goto out;
7196         status = decode_layoutcommit(xdr, rqstp, res);
7197         if (status)
7198                 goto out;
7199         decode_getfattr(xdr, res->fattr, res->server);
7200 out:
7201         return status;
7202 }
7203
7204 /*
7205  * Decode SECINFO_NO_NAME response
7206  */
7207 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7208                                         struct xdr_stream *xdr,
7209                                         struct nfs4_secinfo_res *res)
7210 {
7211         struct compound_hdr hdr;
7212         int status;
7213
7214         status = decode_compound_hdr(xdr, &hdr);
7215         if (status)
7216                 goto out;
7217         status = decode_sequence(xdr, &res->seq_res, rqstp);
7218         if (status)
7219                 goto out;
7220         status = decode_putrootfh(xdr);
7221         if (status)
7222                 goto out;
7223         status = decode_secinfo_no_name(xdr, res);
7224 out:
7225         return status;
7226 }
7227
7228 /*
7229  * Decode TEST_STATEID response
7230  */
7231 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7232                                      struct xdr_stream *xdr,
7233                                      struct nfs41_test_stateid_res *res)
7234 {
7235         struct compound_hdr hdr;
7236         int status;
7237
7238         status = decode_compound_hdr(xdr, &hdr);
7239         if (status)
7240                 goto out;
7241         status = decode_sequence(xdr, &res->seq_res, rqstp);
7242         if (status)
7243                 goto out;
7244         status = decode_test_stateid(xdr, res);
7245 out:
7246         return status;
7247 }
7248
7249 /*
7250  * Decode FREE_STATEID response
7251  */
7252 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7253                                      struct xdr_stream *xdr,
7254                                      struct nfs41_free_stateid_res *res)
7255 {
7256         struct compound_hdr hdr;
7257         int status;
7258
7259         status = decode_compound_hdr(xdr, &hdr);
7260         if (status)
7261                 goto out;
7262         status = decode_sequence(xdr, &res->seq_res, rqstp);
7263         if (status)
7264                 goto out;
7265         status = decode_free_stateid(xdr, res);
7266 out:
7267         return status;
7268 }
7269 #endif /* CONFIG_NFS_V4_1 */
7270
7271 /**
7272  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7273  *                      the local page cache.
7274  * @xdr: XDR stream where entry resides
7275  * @entry: buffer to fill in with entry data
7276  * @plus: boolean indicating whether this should be a readdirplus entry
7277  *
7278  * Returns zero if successful, otherwise a negative errno value is
7279  * returned.
7280  *
7281  * This function is not invoked during READDIR reply decoding, but
7282  * rather whenever an application invokes the getdents(2) system call
7283  * on a directory already in our cache.
7284  */
7285 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7286                        int plus)
7287 {
7288         unsigned int savep;
7289         uint32_t bitmap[3] = {0};
7290         uint32_t len;
7291         __be32 *p = xdr_inline_decode(xdr, 4);
7292         if (unlikely(!p))
7293                 goto out_overflow;
7294         if (*p == xdr_zero) {
7295                 p = xdr_inline_decode(xdr, 4);
7296                 if (unlikely(!p))
7297                         goto out_overflow;
7298                 if (*p == xdr_zero)
7299                         return -EAGAIN;
7300                 entry->eof = 1;
7301                 return -EBADCOOKIE;
7302         }
7303
7304         p = xdr_inline_decode(xdr, 12);
7305         if (unlikely(!p))
7306                 goto out_overflow;
7307         entry->prev_cookie = entry->cookie;
7308         p = xdr_decode_hyper(p, &entry->cookie);
7309         entry->len = be32_to_cpup(p);
7310
7311         p = xdr_inline_decode(xdr, entry->len);
7312         if (unlikely(!p))
7313                 goto out_overflow;
7314         entry->name = (const char *) p;
7315
7316         /*
7317          * In case the server doesn't return an inode number,
7318          * we fake one here.  (We don't use inode number 0,
7319          * since glibc seems to choke on it...)
7320          */
7321         entry->ino = 1;
7322         entry->fattr->valid = 0;
7323
7324         if (decode_attr_bitmap(xdr, bitmap) < 0)
7325                 goto out_overflow;
7326
7327         if (decode_attr_length(xdr, &len, &savep) < 0)
7328                 goto out_overflow;
7329
7330         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7331                         NULL, entry->label, entry->server) < 0)
7332                 goto out_overflow;
7333         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7334                 entry->ino = entry->fattr->mounted_on_fileid;
7335         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7336                 entry->ino = entry->fattr->fileid;
7337
7338         entry->d_type = DT_UNKNOWN;
7339         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7340                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7341
7342         return 0;
7343
7344 out_overflow:
7345         print_overflow_msg(__func__, xdr);
7346         return -EAGAIN;
7347 }
7348
7349 /*
7350  * We need to translate between nfs status return values and
7351  * the local errno values which may not be the same.
7352  */
7353 static struct {
7354         int stat;
7355         int errno;
7356 } nfs_errtbl[] = {
7357         { NFS4_OK,              0               },
7358         { NFS4ERR_PERM,         -EPERM          },
7359         { NFS4ERR_NOENT,        -ENOENT         },
7360         { NFS4ERR_IO,           -errno_NFSERR_IO},
7361         { NFS4ERR_NXIO,         -ENXIO          },
7362         { NFS4ERR_ACCESS,       -EACCES         },
7363         { NFS4ERR_EXIST,        -EEXIST         },
7364         { NFS4ERR_XDEV,         -EXDEV          },
7365         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7366         { NFS4ERR_ISDIR,        -EISDIR         },
7367         { NFS4ERR_INVAL,        -EINVAL         },
7368         { NFS4ERR_FBIG,         -EFBIG          },
7369         { NFS4ERR_NOSPC,        -ENOSPC         },
7370         { NFS4ERR_ROFS,         -EROFS          },
7371         { NFS4ERR_MLINK,        -EMLINK         },
7372         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7373         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7374         { NFS4ERR_DQUOT,        -EDQUOT         },
7375         { NFS4ERR_STALE,        -ESTALE         },
7376         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7377         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7378         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7379         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7380         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7381         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7382         { NFS4ERR_LOCKED,       -EAGAIN         },
7383         { NFS4ERR_SYMLINK,      -ELOOP          },
7384         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7385         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7386         { -1,                   -EIO            }
7387 };
7388
7389 /*
7390  * Convert an NFS error code to a local one.
7391  * This one is used jointly by NFSv2 and NFSv3.
7392  */
7393 static int
7394 nfs4_stat_to_errno(int stat)
7395 {
7396         int i;
7397         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7398                 if (nfs_errtbl[i].stat == stat)
7399                         return nfs_errtbl[i].errno;
7400         }
7401         if (stat <= 10000 || stat > 10100) {
7402                 /* The server is looney tunes. */
7403                 return -EREMOTEIO;
7404         }
7405         /* If we cannot translate the error, the recovery routines should
7406          * handle it.
7407          * Note: remaining NFSv4 error codes have values > 10000, so should
7408          * not conflict with native Linux error codes.
7409          */
7410         return -stat;
7411 }
7412
7413 #define PROC(proc, argtype, restype)                            \
7414 [NFSPROC4_CLNT_##proc] = {                                      \
7415         .p_proc   = NFSPROC4_COMPOUND,                          \
7416         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7417         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7418         .p_arglen = NFS4_##argtype##_sz,                        \
7419         .p_replen = NFS4_##restype##_sz,                        \
7420         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7421         .p_name   = #proc,                                      \
7422 }
7423
7424 struct rpc_procinfo     nfs4_procedures[] = {
7425         PROC(READ,              enc_read,               dec_read),
7426         PROC(WRITE,             enc_write,              dec_write),
7427         PROC(COMMIT,            enc_commit,             dec_commit),
7428         PROC(OPEN,              enc_open,               dec_open),
7429         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7430         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7431         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7432         PROC(CLOSE,             enc_close,              dec_close),
7433         PROC(SETATTR,           enc_setattr,            dec_setattr),
7434         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7435         PROC(RENEW,             enc_renew,              dec_renew),
7436         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7437         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7438         PROC(LOCK,              enc_lock,               dec_lock),
7439         PROC(LOCKT,             enc_lockt,              dec_lockt),
7440         PROC(LOCKU,             enc_locku,              dec_locku),
7441         PROC(ACCESS,            enc_access,             dec_access),
7442         PROC(GETATTR,           enc_getattr,            dec_getattr),
7443         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7444         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7445         PROC(REMOVE,            enc_remove,             dec_remove),
7446         PROC(RENAME,            enc_rename,             dec_rename),
7447         PROC(LINK,              enc_link,               dec_link),
7448         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7449         PROC(CREATE,            enc_create,             dec_create),
7450         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7451         PROC(STATFS,            enc_statfs,             dec_statfs),
7452         PROC(READLINK,          enc_readlink,           dec_readlink),
7453         PROC(READDIR,           enc_readdir,            dec_readdir),
7454         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7455         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7456         PROC(GETACL,            enc_getacl,             dec_getacl),
7457         PROC(SETACL,            enc_setacl,             dec_setacl),
7458         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7459         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7460         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7461         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7462 #if defined(CONFIG_NFS_V4_1)
7463         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7464         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7465         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7466         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7467         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7468         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7469         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7470         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7471         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7472         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7473         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7474         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7475         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7476         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7477         PROC(BIND_CONN_TO_SESSION,
7478                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7479         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7480 #endif /* CONFIG_NFS_V4_1 */
7481 };
7482
7483 const struct rpc_version nfs_version4 = {
7484         .number                 = 4,
7485         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7486         .procs                  = nfs4_procedures
7487 };
7488
7489 /*
7490  * Local variables:
7491  *  c-basic-offset: 8
7492  * End:
7493  */