Pileus Git - ~andy/linux/blob - 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 bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3101                 int *nfs_retval)
3102 {
3103         __be32 *p;
3104         uint32_t opnum;
3105         int32_t nfserr;
3106
3107         p = xdr_inline_decode(xdr, 8);
3108         if (unlikely(!p))
3109                 goto out_overflow;
3110         opnum = be32_to_cpup(p++);
3111         if (unlikely(opnum != expected))
3112                 goto out_bad_operation;
3113         nfserr = be32_to_cpup(p);
3114         if (nfserr == NFS_OK)
3115                 *nfs_retval = 0;
3116         else
3117                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3118         return true;
3119 out_bad_operation:
3120         dprintk("nfs: Server returned operation"
3121                 " %d but we issued a request for %d\n",
3122                         opnum, expected);
3123         *nfs_retval = -EREMOTEIO;
3124         return false;
3125 out_overflow:
3126         print_overflow_msg(__func__, xdr);
3127         *nfs_retval = -EIO;
3128         return false;
3129 }
3130
3131 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3132 {
3133         int retval;
3134
3135         __decode_op_hdr(xdr, expected, &retval);
3136         return retval;
3137 }
3138
3139 /* Dummy routine */
3140 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3141 {
3142         __be32 *p;
3143         unsigned int strlen;
3144         char *str;
3145
3146         p = xdr_inline_decode(xdr, 12);
3147         if (likely(p))
3148                 return decode_opaque_inline(xdr, &strlen, &str);
3149         print_overflow_msg(__func__, xdr);
3150         return -EIO;
3151 }
3152
3153 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3154 {
3155         uint32_t bmlen;
3156         __be32 *p;
3157
3158         p = xdr_inline_decode(xdr, 4);
3159         if (unlikely(!p))
3160                 goto out_overflow;
3161         bmlen = be32_to_cpup(p);
3162
3163         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3164         p = xdr_inline_decode(xdr, (bmlen << 2));
3165         if (unlikely(!p))
3166                 goto out_overflow;
3167         if (bmlen > 0) {
3168                 bitmap[0] = be32_to_cpup(p++);
3169                 if (bmlen > 1) {
3170                         bitmap[1] = be32_to_cpup(p++);
3171                         if (bmlen > 2)
3172                                 bitmap[2] = be32_to_cpup(p);
3173                 }
3174         }
3175         return 0;
3176 out_overflow:
3177         print_overflow_msg(__func__, xdr);
3178         return -EIO;
3179 }
3180
3181 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3182 {
3183         __be32 *p;
3184
3185         p = xdr_inline_decode(xdr, 4);
3186         if (unlikely(!p))
3187                 goto out_overflow;
3188         *attrlen = be32_to_cpup(p);
3189         *savep = xdr_stream_pos(xdr);
3190         return 0;
3191 out_overflow:
3192         print_overflow_msg(__func__, xdr);
3193         return -EIO;
3194 }
3195
3196 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3197 {
3198         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3199                 int ret;
3200                 ret = decode_attr_bitmap(xdr, bitmask);
3201                 if (unlikely(ret < 0))
3202                         return ret;
3203                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3204         } else
3205                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3206         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3207                 bitmask[0], bitmask[1], bitmask[2]);
3208         return 0;
3209 }
3210
3211 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3212 {
3213         __be32 *p;
3214         int ret = 0;
3215
3216         *type = 0;
3217         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3218                 return -EIO;
3219         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3220                 p = xdr_inline_decode(xdr, 4);
3221                 if (unlikely(!p))
3222                         goto out_overflow;
3223                 *type = be32_to_cpup(p);
3224                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3225                         dprintk("%s: bad type %d\n", __func__, *type);
3226                         return -EIO;
3227                 }
3228                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3229                 ret = NFS_ATTR_FATTR_TYPE;
3230         }
3231         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3232         return ret;
3233 out_overflow:
3234         print_overflow_msg(__func__, xdr);
3235         return -EIO;
3236 }
3237
3238 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3239                                       uint32_t *bitmap, uint32_t *type)
3240 {
3241         __be32 *p;
3242
3243         *type = 0;
3244         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3245                 return -EIO;
3246         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3247                 p = xdr_inline_decode(xdr, 4);
3248                 if (unlikely(!p))
3249                         goto out_overflow;
3250                 *type = be32_to_cpup(p);
3251                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3252         }
3253         dprintk("%s: expire type=0x%x\n", __func__, *type);
3254         return 0;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3261 {
3262         __be32 *p;
3263         int ret = 0;
3264
3265         *change = 0;
3266         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3267                 return -EIO;
3268         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3269                 p = xdr_inline_decode(xdr, 8);
3270                 if (unlikely(!p))
3271                         goto out_overflow;
3272                 xdr_decode_hyper(p, change);
3273                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3274                 ret = NFS_ATTR_FATTR_CHANGE;
3275         }
3276         dprintk("%s: change attribute=%Lu\n", __func__,
3277                         (unsigned long long)*change);
3278         return ret;
3279 out_overflow:
3280         print_overflow_msg(__func__, xdr);
3281         return -EIO;
3282 }
3283
3284 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3285 {
3286         __be32 *p;
3287         int ret = 0;
3288
3289         *size = 0;
3290         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3291                 return -EIO;
3292         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3293                 p = xdr_inline_decode(xdr, 8);
3294                 if (unlikely(!p))
3295                         goto out_overflow;
3296                 xdr_decode_hyper(p, size);
3297                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3298                 ret = NFS_ATTR_FATTR_SIZE;
3299         }
3300         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3301         return ret;
3302 out_overflow:
3303         print_overflow_msg(__func__, xdr);
3304         return -EIO;
3305 }
3306
3307 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3308 {
3309         __be32 *p;
3310
3311         *res = 0;
3312         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3313                 return -EIO;
3314         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3315                 p = xdr_inline_decode(xdr, 4);
3316                 if (unlikely(!p))
3317                         goto out_overflow;
3318                 *res = be32_to_cpup(p);
3319                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3320         }
3321         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3322         return 0;
3323 out_overflow:
3324         print_overflow_msg(__func__, xdr);
3325         return -EIO;
3326 }
3327
3328 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3329 {
3330         __be32 *p;
3331
3332         *res = 0;
3333         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3334                 return -EIO;
3335         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3336                 p = xdr_inline_decode(xdr, 4);
3337                 if (unlikely(!p))
3338                         goto out_overflow;
3339                 *res = be32_to_cpup(p);
3340                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3341         }
3342         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3343         return 0;
3344 out_overflow:
3345         print_overflow_msg(__func__, xdr);
3346         return -EIO;
3347 }
3348
3349 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3350 {
3351         __be32 *p;
3352         int ret = 0;
3353
3354         fsid->major = 0;
3355         fsid->minor = 0;
3356         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3357                 return -EIO;
3358         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3359                 p = xdr_inline_decode(xdr, 16);
3360                 if (unlikely(!p))
3361                         goto out_overflow;
3362                 p = xdr_decode_hyper(p, &fsid->major);
3363                 xdr_decode_hyper(p, &fsid->minor);
3364                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3365                 ret = NFS_ATTR_FATTR_FSID;
3366         }
3367         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3368                         (unsigned long long)fsid->major,
3369                         (unsigned long long)fsid->minor);
3370         return ret;
3371 out_overflow:
3372         print_overflow_msg(__func__, xdr);
3373         return -EIO;
3374 }
3375
3376 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3377 {
3378         __be32 *p;
3379
3380         *res = 60;
3381         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3382                 return -EIO;
3383         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3384                 p = xdr_inline_decode(xdr, 4);
3385                 if (unlikely(!p))
3386                         goto out_overflow;
3387                 *res = be32_to_cpup(p);
3388                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3389         }
3390         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3391         return 0;
3392 out_overflow:
3393         print_overflow_msg(__func__, xdr);
3394         return -EIO;
3395 }
3396
3397 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3398 {
3399         __be32 *p;
3400
3401         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3402                 return -EIO;
3403         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3404                 p = xdr_inline_decode(xdr, 4);
3405                 if (unlikely(!p))
3406                         goto out_overflow;
3407                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3408                 *res = -be32_to_cpup(p);
3409         }
3410         return 0;
3411 out_overflow:
3412         print_overflow_msg(__func__, xdr);
3413         return -EIO;
3414 }
3415
3416 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3417 {
3418         __be32 *p;
3419         int len;
3420
3421         if (fh != NULL)
3422                 memset(fh, 0, sizeof(*fh));
3423
3424         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3427                 p = xdr_inline_decode(xdr, 4);
3428                 if (unlikely(!p))
3429                         goto out_overflow;
3430                 len = be32_to_cpup(p);
3431                 if (len > NFS4_FHSIZE)
3432                         return -EIO;
3433                 p = xdr_inline_decode(xdr, len);
3434                 if (unlikely(!p))
3435                         goto out_overflow;
3436                 if (fh != NULL) {
3437                         memcpy(fh->data, p, len);
3438                         fh->size = len;
3439                 }
3440                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3441         }
3442         return 0;
3443 out_overflow:
3444         print_overflow_msg(__func__, xdr);
3445         return -EIO;
3446 }
3447
3448 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3449 {
3450         __be32 *p;
3451
3452         *res = 0;
3453         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3454                 return -EIO;
3455         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3456                 p = xdr_inline_decode(xdr, 4);
3457                 if (unlikely(!p))
3458                         goto out_overflow;
3459                 *res = be32_to_cpup(p);
3460                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3461         }
3462         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3463         return 0;
3464 out_overflow:
3465         print_overflow_msg(__func__, xdr);
3466         return -EIO;
3467 }
3468
3469 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3470 {
3471         __be32 *p;
3472         int ret = 0;
3473
3474         *fileid = 0;
3475         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3476                 return -EIO;
3477         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3478                 p = xdr_inline_decode(xdr, 8);
3479                 if (unlikely(!p))
3480                         goto out_overflow;
3481                 xdr_decode_hyper(p, fileid);
3482                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3483                 ret = NFS_ATTR_FATTR_FILEID;
3484         }
3485         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3486         return ret;
3487 out_overflow:
3488         print_overflow_msg(__func__, xdr);
3489         return -EIO;
3490 }
3491
3492 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3493 {
3494         __be32 *p;
3495         int ret = 0;
3496
3497         *fileid = 0;
3498         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3499                 return -EIO;
3500         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3501                 p = xdr_inline_decode(xdr, 8);
3502                 if (unlikely(!p))
3503                         goto out_overflow;
3504                 xdr_decode_hyper(p, fileid);
3505                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3506                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3507         }
3508         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3509         return ret;
3510 out_overflow:
3511         print_overflow_msg(__func__, xdr);
3512         return -EIO;
3513 }
3514
3515 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3516 {
3517         __be32 *p;
3518         int status = 0;
3519
3520         *res = 0;
3521         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3522                 return -EIO;
3523         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3524                 p = xdr_inline_decode(xdr, 8);
3525                 if (unlikely(!p))
3526                         goto out_overflow;
3527                 xdr_decode_hyper(p, res);
3528                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3529         }
3530         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3531         return status;
3532 out_overflow:
3533         print_overflow_msg(__func__, xdr);
3534         return -EIO;
3535 }
3536
3537 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3538 {
3539         __be32 *p;
3540         int status = 0;
3541
3542         *res = 0;
3543         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3544                 return -EIO;
3545         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3546                 p = xdr_inline_decode(xdr, 8);
3547                 if (unlikely(!p))
3548                         goto out_overflow;
3549                 xdr_decode_hyper(p, res);
3550                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3551         }
3552         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3553         return status;
3554 out_overflow:
3555         print_overflow_msg(__func__, xdr);
3556         return -EIO;
3557 }
3558
3559 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3560 {
3561         __be32 *p;
3562         int status = 0;
3563
3564         *res = 0;
3565         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3566                 return -EIO;
3567         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3568                 p = xdr_inline_decode(xdr, 8);
3569                 if (unlikely(!p))
3570                         goto out_overflow;
3571                 xdr_decode_hyper(p, res);
3572                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3573         }
3574         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3575         return status;
3576 out_overflow:
3577         print_overflow_msg(__func__, xdr);
3578         return -EIO;
3579 }
3580
3581 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3582 {
3583         u32 n;
3584         __be32 *p;
3585         int status = 0;
3586
3587         p = xdr_inline_decode(xdr, 4);
3588         if (unlikely(!p))
3589                 goto out_overflow;
3590         n = be32_to_cpup(p);
3591         if (n == 0)
3592                 goto root_path;
3593         dprintk("pathname4: ");
3594         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3595                 dprintk("cannot parse %d components in path\n", n);
3596                 goto out_eio;
3597         }
3598         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3599                 struct nfs4_string *component = &path->components[path->ncomponents];
3600                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3601                 if (unlikely(status != 0))
3602                         goto out_eio;
3603                 ifdebug (XDR)
3604                         pr_cont("%s%.*s ",
3605                                 (path->ncomponents != n ? "/ " : ""),
3606                                 component->len, component->data);
3607         }
3608 out:
3609         return status;
3610 root_path:
3611 /* a root pathname is sent as a zero component4 */
3612         path->ncomponents = 1;
3613         path->components[0].len=0;
3614         path->components[0].data=NULL;
3615         dprintk("pathname4: /\n");
3616         goto out;
3617 out_eio:
3618         dprintk(" status %d", status);
3619         status = -EIO;
3620         goto out;
3621 out_overflow:
3622         print_overflow_msg(__func__, xdr);
3623         return -EIO;
3624 }
3625
3626 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3627 {
3628         int n;
3629         __be32 *p;
3630         int status = -EIO;
3631
3632         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3633                 goto out;
3634         status = 0;
3635         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3636                 goto out;
3637         status = -EIO;
3638         /* Ignore borken servers that return unrequested attrs */
3639         if (unlikely(res == NULL))
3640                 goto out;
3641         dprintk("%s: fsroot:\n", __func__);
3642         status = decode_pathname(xdr, &res->fs_path);
3643         if (unlikely(status != 0))
3644                 goto out;
3645         p = xdr_inline_decode(xdr, 4);
3646         if (unlikely(!p))
3647                 goto out_overflow;
3648         n = be32_to_cpup(p);
3649         if (n <= 0)
3650                 goto out_eio;
3651         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3652                 u32 m;
3653                 struct nfs4_fs_location *loc;
3654
3655                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3656                         break;
3657                 loc = &res->locations[res->nlocations];
3658                 p = xdr_inline_decode(xdr, 4);
3659                 if (unlikely(!p))
3660                         goto out_overflow;
3661                 m = be32_to_cpup(p);
3662
3663                 dprintk("%s: servers:\n", __func__);
3664                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3665                         struct nfs4_string *server;
3666
3667                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3668                                 unsigned int i;
3669                                 dprintk("%s: using first %u of %u servers "
3670                                         "returned for location %u\n",
3671                                                 __func__,
3672                                                 NFS4_FS_LOCATION_MAXSERVERS,
3673                                                 m, res->nlocations);
3674                                 for (i = loc->nservers; i < m; i++) {
3675                                         unsigned int len;
3676                                         char *data;
3677                                         status = decode_opaque_inline(xdr, &len, &data);
3678                                         if (unlikely(status != 0))
3679                                                 goto out_eio;
3680                                 }
3681                                 break;
3682                         }
3683                         server = &loc->servers[loc->nservers];
3684                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3685                         if (unlikely(status != 0))
3686                                 goto out_eio;
3687                         dprintk("%s ", server->data);
3688                 }
3689                 status = decode_pathname(xdr, &loc->rootpath);
3690                 if (unlikely(status != 0))
3691                         goto out_eio;
3692         }
3693         if (res->nlocations != 0)
3694                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3695 out:
3696         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3697         return status;
3698 out_overflow:
3699         print_overflow_msg(__func__, xdr);
3700 out_eio:
3701         status = -EIO;
3702         goto out;
3703 }
3704
3705 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3706 {
3707         __be32 *p;
3708         int status = 0;
3709
3710         *res = 0;
3711         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3712                 return -EIO;
3713         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3714                 p = xdr_inline_decode(xdr, 8);
3715                 if (unlikely(!p))
3716                         goto out_overflow;
3717                 xdr_decode_hyper(p, res);
3718                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3719         }
3720         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3721         return status;
3722 out_overflow:
3723         print_overflow_msg(__func__, xdr);
3724         return -EIO;
3725 }
3726
3727 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3728 {
3729         __be32 *p;
3730         int status = 0;
3731
3732         *maxlink = 1;
3733         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3734                 return -EIO;
3735         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3736                 p = xdr_inline_decode(xdr, 4);
3737                 if (unlikely(!p))
3738                         goto out_overflow;
3739                 *maxlink = be32_to_cpup(p);
3740                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3741         }
3742         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3743         return status;
3744 out_overflow:
3745         print_overflow_msg(__func__, xdr);
3746         return -EIO;
3747 }
3748
3749 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3750 {
3751         __be32 *p;
3752         int status = 0;
3753
3754         *maxname = 1024;
3755         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3756                 return -EIO;
3757         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3758                 p = xdr_inline_decode(xdr, 4);
3759                 if (unlikely(!p))
3760                         goto out_overflow;
3761                 *maxname = be32_to_cpup(p);
3762                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3763         }
3764         dprintk("%s: maxname=%u\n", __func__, *maxname);
3765         return status;
3766 out_overflow:
3767         print_overflow_msg(__func__, xdr);
3768         return -EIO;
3769 }
3770
3771 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3772 {
3773         __be32 *p;
3774         int status = 0;
3775
3776         *res = 1024;
3777         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3780                 uint64_t maxread;
3781                 p = xdr_inline_decode(xdr, 8);
3782                 if (unlikely(!p))
3783                         goto out_overflow;
3784                 xdr_decode_hyper(p, &maxread);
3785                 if (maxread > 0x7FFFFFFF)
3786                         maxread = 0x7FFFFFFF;
3787                 *res = (uint32_t)maxread;
3788                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3789         }
3790         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3791         return status;
3792 out_overflow:
3793         print_overflow_msg(__func__, xdr);
3794         return -EIO;
3795 }
3796
3797 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3798 {
3799         __be32 *p;
3800         int status = 0;
3801
3802         *res = 1024;
3803         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3804                 return -EIO;
3805         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3806                 uint64_t maxwrite;
3807                 p = xdr_inline_decode(xdr, 8);
3808                 if (unlikely(!p))
3809                         goto out_overflow;
3810                 xdr_decode_hyper(p, &maxwrite);
3811                 if (maxwrite > 0x7FFFFFFF)
3812                         maxwrite = 0x7FFFFFFF;
3813                 *res = (uint32_t)maxwrite;
3814                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3815         }
3816         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3817         return status;
3818 out_overflow:
3819         print_overflow_msg(__func__, xdr);
3820         return -EIO;
3821 }
3822
3823 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3824 {
3825         uint32_t tmp;
3826         __be32 *p;
3827         int ret = 0;
3828
3829         *mode = 0;
3830         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3831                 return -EIO;
3832         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3833                 p = xdr_inline_decode(xdr, 4);
3834                 if (unlikely(!p))
3835                         goto out_overflow;
3836                 tmp = be32_to_cpup(p);
3837                 *mode = tmp & ~S_IFMT;
3838                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3839                 ret = NFS_ATTR_FATTR_MODE;
3840         }
3841         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3842         return ret;
3843 out_overflow:
3844         print_overflow_msg(__func__, xdr);
3845         return -EIO;
3846 }
3847
3848 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3849 {
3850         __be32 *p;
3851         int ret = 0;
3852
3853         *nlink = 1;
3854         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3855                 return -EIO;
3856         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3857                 p = xdr_inline_decode(xdr, 4);
3858                 if (unlikely(!p))
3859                         goto out_overflow;
3860                 *nlink = be32_to_cpup(p);
3861                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3862                 ret = NFS_ATTR_FATTR_NLINK;
3863         }
3864         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3865         return ret;
3866 out_overflow:
3867         print_overflow_msg(__func__, xdr);
3868         return -EIO;
3869 }
3870
3871 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3872                 const struct nfs_server *server, kuid_t *uid,
3873                 struct nfs4_string *owner_name)
3874 {
3875         uint32_t len;
3876         __be32 *p;
3877         int ret = 0;
3878
3879         *uid = make_kuid(&init_user_ns, -2);
3880         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3881                 return -EIO;
3882         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3883                 p = xdr_inline_decode(xdr, 4);
3884                 if (unlikely(!p))
3885                         goto out_overflow;
3886                 len = be32_to_cpup(p);
3887                 p = xdr_inline_decode(xdr, len);
3888                 if (unlikely(!p))
3889                         goto out_overflow;
3890                 if (owner_name != NULL) {
3891                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3892                         if (owner_name->data != NULL) {
3893                                 owner_name->len = len;
3894                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3895                         }
3896                 } else if (len < XDR_MAX_NETOBJ) {
3897                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3898                                 ret = NFS_ATTR_FATTR_OWNER;
3899                         else
3900                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3901                                                 __func__);
3902                 } else
3903                         dprintk("%s: name too long (%u)!\n",
3904                                         __func__, len);
3905                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3906         }
3907         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3908         return ret;
3909 out_overflow:
3910         print_overflow_msg(__func__, xdr);
3911         return -EIO;
3912 }
3913
3914 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3915                 const struct nfs_server *server, kgid_t *gid,
3916                 struct nfs4_string *group_name)
3917 {
3918         uint32_t len;
3919         __be32 *p;
3920         int ret = 0;
3921
3922         *gid = make_kgid(&init_user_ns, -2);
3923         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3924                 return -EIO;
3925         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3926                 p = xdr_inline_decode(xdr, 4);
3927                 if (unlikely(!p))
3928                         goto out_overflow;
3929                 len = be32_to_cpup(p);
3930                 p = xdr_inline_decode(xdr, len);
3931                 if (unlikely(!p))
3932                         goto out_overflow;
3933                 if (group_name != NULL) {
3934                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3935                         if (group_name->data != NULL) {
3936                                 group_name->len = len;
3937                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3938                         }
3939                 } else if (len < XDR_MAX_NETOBJ) {
3940                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3941                                 ret = NFS_ATTR_FATTR_GROUP;
3942                         else
3943                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3944                                                 __func__);
3945                 } else
3946                         dprintk("%s: name too long (%u)!\n",
3947                                         __func__, len);
3948                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3949         }
3950         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951         return ret;
3952 out_overflow:
3953         print_overflow_msg(__func__, xdr);
3954         return -EIO;
3955 }
3956
3957 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3958 {
3959         uint32_t major = 0, minor = 0;
3960         __be32 *p;
3961         int ret = 0;
3962
3963         *rdev = MKDEV(0,0);
3964         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3965                 return -EIO;
3966         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3967                 dev_t tmp;
3968
3969                 p = xdr_inline_decode(xdr, 8);
3970                 if (unlikely(!p))
3971                         goto out_overflow;
3972                 major = be32_to_cpup(p++);
3973                 minor = be32_to_cpup(p);
3974                 tmp = MKDEV(major, minor);
3975                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3976                         *rdev = tmp;
3977                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3978                 ret = NFS_ATTR_FATTR_RDEV;
3979         }
3980         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3981         return ret;
3982 out_overflow:
3983         print_overflow_msg(__func__, xdr);
3984         return -EIO;
3985 }
3986
3987 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3988 {
3989         __be32 *p;
3990         int status = 0;
3991
3992         *res = 0;
3993         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3994                 return -EIO;
3995         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3996                 p = xdr_inline_decode(xdr, 8);
3997                 if (unlikely(!p))
3998                         goto out_overflow;
3999                 xdr_decode_hyper(p, res);
4000                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4001         }
4002         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4003         return status;
4004 out_overflow:
4005         print_overflow_msg(__func__, xdr);
4006         return -EIO;
4007 }
4008
4009 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011         __be32 *p;
4012         int status = 0;
4013
4014         *res = 0;
4015         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4016                 return -EIO;
4017         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4018                 p = xdr_inline_decode(xdr, 8);
4019                 if (unlikely(!p))
4020                         goto out_overflow;
4021                 xdr_decode_hyper(p, res);
4022                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4023         }
4024         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4025         return status;
4026 out_overflow:
4027         print_overflow_msg(__func__, xdr);
4028         return -EIO;
4029 }
4030
4031 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032 {
4033         __be32 *p;
4034         int status = 0;
4035
4036         *res = 0;
4037         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4038                 return -EIO;
4039         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4040                 p = xdr_inline_decode(xdr, 8);
4041                 if (unlikely(!p))
4042                         goto out_overflow;
4043                 xdr_decode_hyper(p, res);
4044                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4045         }
4046         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4047         return status;
4048 out_overflow:
4049         print_overflow_msg(__func__, xdr);
4050         return -EIO;
4051 }
4052
4053 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4054 {
4055         __be32 *p;
4056         int ret = 0;
4057
4058         *used = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4062                 p = xdr_inline_decode(xdr, 8);
4063                 if (unlikely(!p))
4064                         goto out_overflow;
4065                 xdr_decode_hyper(p, used);
4066                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4067                 ret = NFS_ATTR_FATTR_SPACE_USED;
4068         }
4069         dprintk("%s: space used=%Lu\n", __func__,
4070                         (unsigned long long)*used);
4071         return ret;
4072 out_overflow:
4073         print_overflow_msg(__func__, xdr);
4074         return -EIO;
4075 }
4076
4077 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4078 {
4079         __be32 *p;
4080         uint64_t sec;
4081         uint32_t nsec;
4082
4083         p = xdr_inline_decode(xdr, 12);
4084         if (unlikely(!p))
4085                 goto out_overflow;
4086         p = xdr_decode_hyper(p, &sec);
4087         nsec = be32_to_cpup(p);
4088         time->tv_sec = (time_t)sec;
4089         time->tv_nsec = (long)nsec;
4090         return 0;
4091 out_overflow:
4092         print_overflow_msg(__func__, xdr);
4093         return -EIO;
4094 }
4095
4096 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097 {
4098         int status = 0;
4099
4100         time->tv_sec = 0;
4101         time->tv_nsec = 0;
4102         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4103                 return -EIO;
4104         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4105                 status = decode_attr_time(xdr, time);
4106                 if (status == 0)
4107                         status = NFS_ATTR_FATTR_ATIME;
4108                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4109         }
4110         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4111         return status;
4112 }
4113
4114 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4115 {
4116         int status = 0;
4117
4118         time->tv_sec = 0;
4119         time->tv_nsec = 0;
4120         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4121                 return -EIO;
4122         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4123                 status = decode_attr_time(xdr, time);
4124                 if (status == 0)
4125                         status = NFS_ATTR_FATTR_CTIME;
4126                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4127         }
4128         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4129         return status;
4130 }
4131
4132 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4133                                   struct timespec *time)
4134 {
4135         int status = 0;
4136
4137         time->tv_sec = 0;
4138         time->tv_nsec = 0;
4139         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4140                 return -EIO;
4141         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4142                 status = decode_attr_time(xdr, time);
4143                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4144         }
4145         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4146                 (long)time->tv_nsec);
4147         return status;
4148 }
4149
4150 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4151                                         struct nfs4_label *label)
4152 {
4153         uint32_t pi = 0;
4154         uint32_t lfs = 0;
4155         __u32 len;
4156         __be32 *p;
4157         int status = 0;
4158
4159         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4160                 return -EIO;
4161         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4162                 p = xdr_inline_decode(xdr, 4);
4163                 if (unlikely(!p))
4164                         goto out_overflow;
4165                 lfs = be32_to_cpup(p++);
4166                 p = xdr_inline_decode(xdr, 4);
4167                 if (unlikely(!p))
4168                         goto out_overflow;
4169                 pi = be32_to_cpup(p++);
4170                 p = xdr_inline_decode(xdr, 4);
4171                 if (unlikely(!p))
4172                         goto out_overflow;
4173                 len = be32_to_cpup(p++);
4174                 p = xdr_inline_decode(xdr, len);
4175                 if (unlikely(!p))
4176                         goto out_overflow;
4177                 if (len < NFS4_MAXLABELLEN) {
4178                         if (label) {
4179                                 memcpy(label->label, p, len);
4180                                 label->len = len;
4181                                 label->pi = pi;
4182                                 label->lfs = lfs;
4183                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4184                         }
4185                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4186                 } else
4187                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4188                                         __func__, len);
4189         }
4190         if (label && label->label)
4191                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4192                         (char *)label->label, label->len, label->pi, label->lfs);
4193         return status;
4194
4195 out_overflow:
4196         print_overflow_msg(__func__, xdr);
4197         return -EIO;
4198 }
4199
4200 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4201 {
4202         int status = 0;
4203
4204         time->tv_sec = 0;
4205         time->tv_nsec = 0;
4206         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4207                 return -EIO;
4208         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4209                 status = decode_attr_time(xdr, time);
4210                 if (status == 0)
4211                         status = NFS_ATTR_FATTR_MTIME;
4212                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4213         }
4214         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4215         return status;
4216 }
4217
4218 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4219 {
4220         unsigned int attrwords = XDR_QUADLEN(attrlen);
4221         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4222
4223         if (unlikely(attrwords != nwords)) {
4224                 dprintk("%s: server returned incorrect attribute length: "
4225                         "%u %c %u\n",
4226                                 __func__,
4227                                 attrwords << 2,
4228                                 (attrwords < nwords) ? '<' : '>',
4229                                 nwords << 2);
4230                 return -EIO;
4231         }
4232         return 0;
4233 }
4234
4235 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4236 {
4237         __be32 *p;
4238
4239         p = xdr_inline_decode(xdr, 20);
4240         if (unlikely(!p))
4241                 goto out_overflow;
4242         cinfo->atomic = be32_to_cpup(p++);
4243         p = xdr_decode_hyper(p, &cinfo->before);
4244         xdr_decode_hyper(p, &cinfo->after);
4245         return 0;
4246 out_overflow:
4247         print_overflow_msg(__func__, xdr);
4248         return -EIO;
4249 }
4250
4251 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4252 {
4253         __be32 *p;
4254         uint32_t supp, acc;
4255         int status;
4256
4257         status = decode_op_hdr(xdr, OP_ACCESS);
4258         if (status)
4259                 return status;
4260         p = xdr_inline_decode(xdr, 8);
4261         if (unlikely(!p))
4262                 goto out_overflow;
4263         supp = be32_to_cpup(p++);
4264         acc = be32_to_cpup(p);
4265         *supported = supp;
4266         *access = acc;
4267         return 0;
4268 out_overflow:
4269         print_overflow_msg(__func__, xdr);
4270         return -EIO;
4271 }
4272
4273 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4274 {
4275         __be32 *p;
4276
4277         p = xdr_inline_decode(xdr, len);
4278         if (likely(p)) {
4279                 memcpy(buf, p, len);
4280                 return 0;
4281         }
4282         print_overflow_msg(__func__, xdr);
4283         return -EIO;
4284 }
4285
4286 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4287 {
4288         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4289 }
4290
4291 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4292 {
4293         int status;
4294
4295         status = decode_op_hdr(xdr, OP_CLOSE);
4296         if (status != -EIO)
4297                 nfs_increment_open_seqid(status, res->seqid);
4298         if (!status)
4299                 status = decode_stateid(xdr, &res->stateid);
4300         return status;
4301 }
4302
4303 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4304 {
4305         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4306 }
4307
4308 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4309 {
4310         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4314 {
4315         int status;
4316
4317         status = decode_op_hdr(xdr, OP_COMMIT);
4318         if (!status)
4319                 status = decode_write_verifier(xdr, &res->verf->verifier);
4320         return status;
4321 }
4322
4323 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4324 {
4325         __be32 *p;
4326         uint32_t bmlen;
4327         int status;
4328
4329         status = decode_op_hdr(xdr, OP_CREATE);
4330         if (status)
4331                 return status;
4332         if ((status = decode_change_info(xdr, cinfo)))
4333                 return status;
4334         p = xdr_inline_decode(xdr, 4);
4335         if (unlikely(!p))
4336                 goto out_overflow;
4337         bmlen = be32_to_cpup(p);
4338         p = xdr_inline_decode(xdr, bmlen << 2);
4339         if (likely(p))
4340                 return 0;
4341 out_overflow:
4342         print_overflow_msg(__func__, xdr);
4343         return -EIO;
4344 }
4345
4346 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4347 {
4348         unsigned int savep;
4349         uint32_t attrlen, bitmap[3] = {0};
4350         int status;
4351
4352         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4355                 goto xdr_error;
4356         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4361                                                  &res->fh_expire_type)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4366                 goto xdr_error;
4367         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4368                 goto xdr_error;
4369         status = verify_attr_len(xdr, savep, attrlen);
4370 xdr_error:
4371         dprintk("%s: xdr returned %d!\n", __func__, -status);
4372         return status;
4373 }
4374
4375 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4376 {
4377         unsigned int savep;
4378         uint32_t attrlen, bitmap[3] = {0};
4379         int status;
4380
4381         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4382                 goto xdr_error;
4383         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4384                 goto xdr_error;
4385         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4386                 goto xdr_error;
4387
4388         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4389                 goto xdr_error;
4390         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4399                 goto xdr_error;
4400
4401         status = verify_attr_len(xdr, savep, attrlen);
4402 xdr_error:
4403         dprintk("%s: xdr returned %d!\n", __func__, -status);
4404         return status;
4405 }
4406
4407 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4408 {
4409         unsigned int savep;
4410         uint32_t attrlen, bitmap[3] = {0};
4411         int status;
4412
4413         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4414                 goto xdr_error;
4415         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4416                 goto xdr_error;
4417         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4418                 goto xdr_error;
4419
4420         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4421                 goto xdr_error;
4422         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4423                 goto xdr_error;
4424
4425         status = verify_attr_len(xdr, savep, attrlen);
4426 xdr_error:
4427         dprintk("%s: xdr returned %d!\n", __func__, -status);
4428         return status;
4429 }
4430
4431 static int decode_threshold_hint(struct xdr_stream *xdr,
4432                                   uint32_t *bitmap,
4433                                   uint64_t *res,
4434                                   uint32_t hint_bit)
4435 {
4436         __be32 *p;
4437
4438         *res = 0;
4439         if (likely(bitmap[0] & hint_bit)) {
4440                 p = xdr_inline_decode(xdr, 8);
4441                 if (unlikely(!p))
4442                         goto out_overflow;
4443                 xdr_decode_hyper(p, res);
4444         }
4445         return 0;
4446 out_overflow:
4447         print_overflow_msg(__func__, xdr);
4448         return -EIO;
4449 }
4450
4451 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4452                                         struct nfs4_threshold *res)
4453 {
4454         __be32 *p;
4455         unsigned int savep;
4456         uint32_t bitmap[3] = {0,}, attrlen;
4457         int status;
4458
4459         /* layout type */
4460         p = xdr_inline_decode(xdr, 4);
4461         if (unlikely(!p)) {
4462                 print_overflow_msg(__func__, xdr);
4463                 return -EIO;
4464         }
4465         res->l_type = be32_to_cpup(p);
4466
4467         /* thi_hintset bitmap */
4468         status = decode_attr_bitmap(xdr, bitmap);
4469         if (status < 0)
4470                 goto xdr_error;
4471
4472         /* thi_hintlist length */
4473         status = decode_attr_length(xdr, &attrlen, &savep);
4474         if (status < 0)
4475                 goto xdr_error;
4476         /* thi_hintlist */
4477         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4478         if (status < 0)
4479                 goto xdr_error;
4480         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4481         if (status < 0)
4482                 goto xdr_error;
4483         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4484                                        THRESHOLD_RD_IO);
4485         if (status < 0)
4486                 goto xdr_error;
4487         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4488                                        THRESHOLD_WR_IO);
4489         if (status < 0)
4490                 goto xdr_error;
4491
4492         status = verify_attr_len(xdr, savep, attrlen);
4493         res->bm = bitmap[0];
4494
4495         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4496                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4497                 res->wr_io_sz);
4498 xdr_error:
4499         dprintk("%s ret=%d!\n", __func__, status);
4500         return status;
4501 }
4502
4503 /*
4504  * Thresholds on pNFS direct I/O vrs MDS I/O
4505  */
4506 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4507                                     uint32_t *bitmap,
4508                                     struct nfs4_threshold *res)
4509 {
4510         __be32 *p;
4511         int status = 0;
4512         uint32_t num;
4513
4514         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4515                 return -EIO;
4516         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4517                 /* Did the server return an unrequested attribute? */
4518                 if (unlikely(res == NULL))
4519                         return -EREMOTEIO;
4520                 p = xdr_inline_decode(xdr, 4);
4521                 if (unlikely(!p))
4522                         goto out_overflow;
4523                 num = be32_to_cpup(p);
4524                 if (num == 0)
4525                         return 0;
4526                 if (num > 1)
4527                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4528                                 "drivers per filesystem not supported\n",
4529                                 __func__);
4530
4531                 status = decode_first_threshold_item4(xdr, res);
4532                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4533         }
4534         return status;
4535 out_overflow:
4536         print_overflow_msg(__func__, xdr);
4537         return -EIO;
4538 }
4539
4540 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4541                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4542                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4543                 const struct nfs_server *server)
4544 {
4545         int status;
4546         umode_t fmode = 0;
4547         uint32_t type;
4548         int32_t err;
4549
4550         status = decode_attr_type(xdr, bitmap, &type);
4551         if (status < 0)
4552                 goto xdr_error;
4553         fattr->mode = 0;
4554         if (status != 0) {
4555                 fattr->mode |= nfs_type2fmt[type];
4556                 fattr->valid |= status;
4557         }
4558
4559         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4560         if (status < 0)
4561                 goto xdr_error;
4562         fattr->valid |= status;
4563
4564         status = decode_attr_size(xdr, bitmap, &fattr->size);
4565         if (status < 0)
4566                 goto xdr_error;
4567         fattr->valid |= status;
4568
4569         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4570         if (status < 0)
4571                 goto xdr_error;
4572         fattr->valid |= status;
4573
4574         err = 0;
4575         status = decode_attr_error(xdr, bitmap, &err);
4576         if (status < 0)
4577                 goto xdr_error;
4578
4579         status = decode_attr_filehandle(xdr, bitmap, fh);
4580         if (status < 0)
4581                 goto xdr_error;
4582
4583         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4584         if (status < 0)
4585                 goto xdr_error;
4586         fattr->valid |= status;
4587
4588         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4589         if (status < 0)
4590                 goto xdr_error;
4591         fattr->valid |= status;
4592
4593         status = decode_attr_mode(xdr, bitmap, &fmode);
4594         if (status < 0)
4595                 goto xdr_error;
4596         if (status != 0) {
4597                 fattr->mode |= fmode;
4598                 fattr->valid |= status;
4599         }
4600
4601         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4602         if (status < 0)
4603                 goto xdr_error;
4604         fattr->valid |= status;
4605
4606         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4607         if (status < 0)
4608                 goto xdr_error;
4609         fattr->valid |= status;
4610
4611         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4612         if (status < 0)
4613                 goto xdr_error;
4614         fattr->valid |= status;
4615
4616         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4617         if (status < 0)
4618                 goto xdr_error;
4619         fattr->valid |= status;
4620
4621         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4622         if (status < 0)
4623                 goto xdr_error;
4624         fattr->valid |= status;
4625
4626         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4627         if (status < 0)
4628                 goto xdr_error;
4629         fattr->valid |= status;
4630
4631         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635
4636         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4637         if (status < 0)
4638                 goto xdr_error;
4639         fattr->valid |= status;
4640
4641         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4642         if (status < 0)
4643                 goto xdr_error;
4644         fattr->valid |= status;
4645
4646         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4647         if (status < 0)
4648                 goto xdr_error;
4649
4650         if (label) {
4651                 status = decode_attr_security_label(xdr, bitmap, label);
4652                 if (status < 0)
4653                         goto xdr_error;
4654                 fattr->valid |= status;
4655         }
4656
4657 xdr_error:
4658         dprintk("%s: xdr returned %d\n", __func__, -status);
4659         return status;
4660 }
4661
4662 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4663                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4664                 struct nfs4_label *label, const struct nfs_server *server)
4665 {
4666         unsigned int savep;
4667         uint32_t attrlen,
4668                  bitmap[3] = {0};
4669         int status;
4670
4671         status = decode_op_hdr(xdr, OP_GETATTR);
4672         if (status < 0)
4673                 goto xdr_error;
4674
4675         status = decode_attr_bitmap(xdr, bitmap);
4676         if (status < 0)
4677                 goto xdr_error;
4678
4679         status = decode_attr_length(xdr, &attrlen, &savep);
4680         if (status < 0)
4681                 goto xdr_error;
4682
4683         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4684                                         label, server);
4685         if (status < 0)
4686                 goto xdr_error;
4687
4688         status = verify_attr_len(xdr, savep, attrlen);
4689 xdr_error:
4690         dprintk("%s: xdr returned %d\n", __func__, -status);
4691         return status;
4692 }
4693
4694 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4695                 struct nfs4_label *label, const struct nfs_server *server)
4696 {
4697         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4698 }
4699
4700 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4701                 const struct nfs_server *server)
4702 {
4703         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4704 }
4705
4706 /*
4707  * Decode potentially multiple layout types. Currently we only support
4708  * one layout driver per file system.
4709  */
4710 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4711                                          uint32_t *layouttype)
4712 {
4713         __be32 *p;
4714         int num;
4715
4716         p = xdr_inline_decode(xdr, 4);
4717         if (unlikely(!p))
4718                 goto out_overflow;
4719         num = be32_to_cpup(p);
4720
4721         /* pNFS is not supported by the underlying file system */
4722         if (num == 0) {
4723                 *layouttype = 0;
4724                 return 0;
4725         }
4726         if (num > 1)
4727                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4728                         "drivers per filesystem not supported\n", __func__);
4729
4730         /* Decode and set first layout type, move xdr->p past unused types */
4731         p = xdr_inline_decode(xdr, num * 4);
4732         if (unlikely(!p))
4733                 goto out_overflow;
4734         *layouttype = be32_to_cpup(p);
4735         return 0;
4736 out_overflow:
4737         print_overflow_msg(__func__, xdr);
4738         return -EIO;
4739 }
4740
4741 /*
4742  * The type of file system exported.
4743  * Note we must ensure that layouttype is set in any non-error case.
4744  */
4745 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4746                                 uint32_t *layouttype)
4747 {
4748         int status = 0;
4749
4750         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4751         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4752                 return -EIO;
4753         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4754                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4755                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4756         } else
4757                 *layouttype = 0;
4758         return status;
4759 }
4760
4761 /*
4762  * The prefered block size for layout directed io
4763  */
4764 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4765                                       uint32_t *res)
4766 {
4767         __be32 *p;
4768
4769         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4770         *res = 0;
4771         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4772                 p = xdr_inline_decode(xdr, 4);
4773                 if (unlikely(!p)) {
4774                         print_overflow_msg(__func__, xdr);
4775                         return -EIO;
4776                 }
4777                 *res = be32_to_cpup(p);
4778                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4779         }
4780         return 0;
4781 }
4782
4783 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4784 {
4785         unsigned int savep;
4786         uint32_t attrlen, bitmap[3];
4787         int status;
4788
4789         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4790                 goto xdr_error;
4791         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4792                 goto xdr_error;
4793         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4794                 goto xdr_error;
4795
4796         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4797
4798         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4799                 goto xdr_error;
4800         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4801                 goto xdr_error;
4802         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4803                 goto xdr_error;
4804         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4805         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4806                 goto xdr_error;
4807         fsinfo->wtpref = fsinfo->wtmax;
4808         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4809         if (status != 0)
4810                 goto xdr_error;
4811         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4812         if (status != 0)
4813                 goto xdr_error;
4814         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4815         if (status)
4816                 goto xdr_error;
4817
4818         status = verify_attr_len(xdr, savep, attrlen);
4819 xdr_error:
4820         dprintk("%s: xdr returned %d!\n", __func__, -status);
4821         return status;
4822 }
4823
4824 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4825 {
4826         __be32 *p;
4827         uint32_t len;
4828         int status;
4829
4830         /* Zero handle first to allow comparisons */
4831         memset(fh, 0, sizeof(*fh));
4832
4833         status = decode_op_hdr(xdr, OP_GETFH);
4834         if (status)
4835                 return status;
4836
4837         p = xdr_inline_decode(xdr, 4);
4838         if (unlikely(!p))
4839                 goto out_overflow;
4840         len = be32_to_cpup(p);
4841         if (len > NFS4_FHSIZE)
4842                 return -EIO;
4843         fh->size = len;
4844         p = xdr_inline_decode(xdr, len);
4845         if (unlikely(!p))
4846                 goto out_overflow;
4847         memcpy(fh->data, p, len);
4848         return 0;
4849 out_overflow:
4850         print_overflow_msg(__func__, xdr);
4851         return -EIO;
4852 }
4853
4854 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4855 {
4856         int status;
4857
4858         status = decode_op_hdr(xdr, OP_LINK);
4859         if (status)
4860                 return status;
4861         return decode_change_info(xdr, cinfo);
4862 }
4863
4864 /*
4865  * We create the owner, so we know a proper owner.id length is 4.
4866  */
4867 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4868 {
4869         uint64_t offset, length, clientid;
4870         __be32 *p;
4871         uint32_t namelen, type;
4872
4873         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4874         if (unlikely(!p))
4875                 goto out_overflow;
4876         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4877         p = xdr_decode_hyper(p, &length);
4878         type = be32_to_cpup(p++); /* 4 byte read */
4879         if (fl != NULL) { /* manipulate file lock */
4880                 fl->fl_start = (loff_t)offset;
4881                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4882                 if (length == ~(uint64_t)0)
4883                         fl->fl_end = OFFSET_MAX;
4884                 fl->fl_type = F_WRLCK;
4885                 if (type & 1)
4886                         fl->fl_type = F_RDLCK;
4887                 fl->fl_pid = 0;
4888         }
4889         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4890         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4891         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4892         if (likely(p))
4893                 return -NFS4ERR_DENIED;
4894 out_overflow:
4895         print_overflow_msg(__func__, xdr);
4896         return -EIO;
4897 }
4898
4899 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4900 {
4901         int status;
4902
4903         status = decode_op_hdr(xdr, OP_LOCK);
4904         if (status == -EIO)
4905                 goto out;
4906         if (status == 0) {
4907                 status = decode_stateid(xdr, &res->stateid);
4908                 if (unlikely(status))
4909                         goto out;
4910         } else if (status == -NFS4ERR_DENIED)
4911                 status = decode_lock_denied(xdr, NULL);
4912         if (res->open_seqid != NULL)
4913                 nfs_increment_open_seqid(status, res->open_seqid);
4914         nfs_increment_lock_seqid(status, res->lock_seqid);
4915 out:
4916         return status;
4917 }
4918
4919 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4920 {
4921         int status;
4922         status = decode_op_hdr(xdr, OP_LOCKT);
4923         if (status == -NFS4ERR_DENIED)
4924                 return decode_lock_denied(xdr, res->denied);
4925         return status;
4926 }
4927
4928 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4929 {
4930         int status;
4931
4932         status = decode_op_hdr(xdr, OP_LOCKU);
4933         if (status != -EIO)
4934                 nfs_increment_lock_seqid(status, res->seqid);
4935         if (status == 0)
4936                 status = decode_stateid(xdr, &res->stateid);
4937         return status;
4938 }
4939
4940 static int decode_release_lockowner(struct xdr_stream *xdr)
4941 {
4942         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4943 }
4944
4945 static int decode_lookup(struct xdr_stream *xdr)
4946 {
4947         return decode_op_hdr(xdr, OP_LOOKUP);
4948 }
4949
4950 /* This is too sick! */
4951 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4952 {
4953         __be32 *p;
4954         uint32_t limit_type, nblocks, blocksize;
4955
4956         p = xdr_inline_decode(xdr, 12);
4957         if (unlikely(!p))
4958                 goto out_overflow;
4959         limit_type = be32_to_cpup(p++);
4960         switch (limit_type) {
4961         case 1:
4962                 xdr_decode_hyper(p, maxsize);
4963                 break;
4964         case 2:
4965                 nblocks = be32_to_cpup(p++);
4966                 blocksize = be32_to_cpup(p);
4967                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4968         }
4969         return 0;
4970 out_overflow:
4971         print_overflow_msg(__func__, xdr);
4972         return -EIO;
4973 }
4974
4975 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4976 {
4977         __be32 *p;
4978         uint32_t delegation_type;
4979         int status;
4980
4981         p = xdr_inline_decode(xdr, 4);
4982         if (unlikely(!p))
4983                 goto out_overflow;
4984         delegation_type = be32_to_cpup(p);
4985         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4986                 res->delegation_type = 0;
4987                 return 0;
4988         }
4989         status = decode_stateid(xdr, &res->delegation);
4990         if (unlikely(status))
4991                 return status;
4992         p = xdr_inline_decode(xdr, 4);
4993         if (unlikely(!p))
4994                 goto out_overflow;
4995         res->do_recall = be32_to_cpup(p);
4996
4997         switch (delegation_type) {
4998         case NFS4_OPEN_DELEGATE_READ:
4999                 res->delegation_type = FMODE_READ;
5000                 break;
5001         case NFS4_OPEN_DELEGATE_WRITE:
5002                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5003                 if (decode_space_limit(xdr, &res->maxsize) < 0)
5004                                 return -EIO;
5005         }
5006         return decode_ace(xdr, NULL, res->server->nfs_client);
5007 out_overflow:
5008         print_overflow_msg(__func__, xdr);
5009         return -EIO;
5010 }
5011
5012 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5013 {
5014         __be32 *p;
5015         uint32_t savewords, bmlen, i;
5016         int status;
5017
5018         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5019                 return status;
5020         nfs_increment_open_seqid(status, res->seqid);
5021         if (status)
5022                 return status;
5023         status = decode_stateid(xdr, &res->stateid);
5024         if (unlikely(status))
5025                 return status;
5026
5027         decode_change_info(xdr, &res->cinfo);
5028
5029         p = xdr_inline_decode(xdr, 8);
5030         if (unlikely(!p))
5031                 goto out_overflow;
5032         res->rflags = be32_to_cpup(p++);
5033         bmlen = be32_to_cpup(p);
5034         if (bmlen > 10)
5035                 goto xdr_error;
5036
5037         p = xdr_inline_decode(xdr, bmlen << 2);
5038         if (unlikely(!p))
5039                 goto out_overflow;
5040         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5041         for (i = 0; i < savewords; ++i)
5042                 res->attrset[i] = be32_to_cpup(p++);
5043         for (; i < NFS4_BITMAP_SIZE; i++)
5044                 res->attrset[i] = 0;
5045
5046         return decode_delegation(xdr, res);
5047 xdr_error:
5048         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5049         return -EIO;
5050 out_overflow:
5051         print_overflow_msg(__func__, xdr);
5052         return -EIO;
5053 }
5054
5055 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5056 {
5057         int status;
5058
5059         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5060         if (status != -EIO)
5061                 nfs_increment_open_seqid(status, res->seqid);
5062         if (!status)
5063                 status = decode_stateid(xdr, &res->stateid);
5064         return status;
5065 }
5066
5067 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5068 {
5069         int status;
5070
5071         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5072         if (status != -EIO)
5073                 nfs_increment_open_seqid(status, res->seqid);
5074         if (!status)
5075                 status = decode_stateid(xdr, &res->stateid);
5076         return status;
5077 }
5078
5079 static int decode_putfh(struct xdr_stream *xdr)
5080 {
5081         return decode_op_hdr(xdr, OP_PUTFH);
5082 }
5083
5084 static int decode_putrootfh(struct xdr_stream *xdr)
5085 {
5086         return decode_op_hdr(xdr, OP_PUTROOTFH);
5087 }
5088
5089 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5090 {
5091         __be32 *p;
5092         uint32_t count, eof, recvd;
5093         int status;
5094
5095         status = decode_op_hdr(xdr, OP_READ);
5096         if (status)
5097                 return status;
5098         p = xdr_inline_decode(xdr, 8);
5099         if (unlikely(!p))
5100                 goto out_overflow;
5101         eof = be32_to_cpup(p++);
5102         count = be32_to_cpup(p);
5103         recvd = xdr_read_pages(xdr, count);
5104         if (count > recvd) {
5105                 dprintk("NFS: server cheating in read reply: "
5106                                 "count %u > recvd %u\n", count, recvd);
5107                 count = recvd;
5108                 eof = 0;
5109         }
5110         res->eof = eof;
5111         res->count = count;
5112         return 0;
5113 out_overflow:
5114         print_overflow_msg(__func__, xdr);
5115         return -EIO;
5116 }
5117
5118 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5119 {
5120         int             status;
5121         __be32          verf[2];
5122
5123         status = decode_op_hdr(xdr, OP_READDIR);
5124         if (!status)
5125                 status = decode_verifier(xdr, readdir->verifier.data);
5126         if (unlikely(status))
5127                 return status;
5128         memcpy(verf, readdir->verifier.data, sizeof(verf));
5129         dprintk("%s: verifier = %08x:%08x\n",
5130                         __func__, verf[0], verf[1]);
5131         return xdr_read_pages(xdr, xdr->buf->page_len);
5132 }
5133
5134 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5135 {
5136         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5137         u32 len, recvd;
5138         __be32 *p;
5139         int status;
5140
5141         status = decode_op_hdr(xdr, OP_READLINK);
5142         if (status)
5143                 return status;
5144
5145         /* Convert length of symlink */
5146         p = xdr_inline_decode(xdr, 4);
5147         if (unlikely(!p))
5148                 goto out_overflow;
5149         len = be32_to_cpup(p);
5150         if (len >= rcvbuf->page_len || len <= 0) {
5151                 dprintk("nfs: server returned giant symlink!\n");
5152                 return -ENAMETOOLONG;
5153         }
5154         recvd = xdr_read_pages(xdr, len);
5155         if (recvd < len) {
5156                 dprintk("NFS: server cheating in readlink reply: "
5157                                 "count %u > recvd %u\n", len, recvd);
5158                 return -EIO;
5159         }
5160         /*
5161          * The XDR encode routine has set things up so that
5162          * the link text will be copied directly into the
5163          * buffer.  We just have to do overflow-checking,
5164          * and and null-terminate the text (the VFS expects
5165          * null-termination).
5166          */
5167         xdr_terminate_string(rcvbuf, len);
5168         return 0;
5169 out_overflow:
5170         print_overflow_msg(__func__, xdr);
5171         return -EIO;
5172 }
5173
5174 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5175 {
5176         int status;
5177
5178         status = decode_op_hdr(xdr, OP_REMOVE);
5179         if (status)
5180                 goto out;
5181         status = decode_change_info(xdr, cinfo);
5182 out:
5183         return status;
5184 }
5185
5186 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5187               struct nfs4_change_info *new_cinfo)
5188 {
5189         int status;
5190
5191         status = decode_op_hdr(xdr, OP_RENAME);
5192         if (status)
5193                 goto out;
5194         if ((status = decode_change_info(xdr, old_cinfo)))
5195                 goto out;
5196         status = decode_change_info(xdr, new_cinfo);
5197 out:
5198         return status;
5199 }
5200
5201 static int decode_renew(struct xdr_stream *xdr)
5202 {
5203         return decode_op_hdr(xdr, OP_RENEW);
5204 }
5205
5206 static int
5207 decode_restorefh(struct xdr_stream *xdr)
5208 {
5209         return decode_op_hdr(xdr, OP_RESTOREFH);
5210 }
5211
5212 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5213                          struct nfs_getaclres *res)
5214 {
5215         unsigned int savep;
5216         uint32_t attrlen,
5217                  bitmap[3] = {0};
5218         int status;
5219         unsigned int pg_offset;
5220
5221         res->acl_len = 0;
5222         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5223                 goto out;
5224
5225         xdr_enter_page(xdr, xdr->buf->page_len);
5226
5227         /* Calculate the offset of the page data */
5228         pg_offset = xdr->buf->head[0].iov_len;
5229
5230         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5231                 goto out;
5232         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5233                 goto out;
5234
5235         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5236                 return -EIO;
5237         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5238
5239                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5240                  * are stored with the acl data to handle the problem of
5241                  * variable length bitmaps.*/
5242                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5243                 res->acl_len = attrlen;
5244
5245                 /* Check for receive buffer overflow */
5246                 if (res->acl_len > (xdr->nwords << 2) ||
5247                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5248                         res->acl_flags |= NFS4_ACL_TRUNC;
5249                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5250                                         attrlen, xdr->nwords << 2);
5251                 }
5252         } else
5253                 status = -EOPNOTSUPP;
5254
5255 out:
5256         return status;
5257 }
5258
5259 static int
5260 decode_savefh(struct xdr_stream *xdr)
5261 {
5262         return decode_op_hdr(xdr, OP_SAVEFH);
5263 }
5264
5265 static int decode_setattr(struct xdr_stream *xdr)
5266 {
5267         __be32 *p;
5268         uint32_t bmlen;
5269         int status;
5270
5271         status = decode_op_hdr(xdr, OP_SETATTR);
5272         if (status)
5273                 return status;
5274         p = xdr_inline_decode(xdr, 4);
5275         if (unlikely(!p))
5276                 goto out_overflow;
5277         bmlen = be32_to_cpup(p);
5278         p = xdr_inline_decode(xdr, bmlen << 2);
5279         if (likely(p))
5280                 return 0;
5281 out_overflow:
5282         print_overflow_msg(__func__, xdr);
5283         return -EIO;
5284 }
5285
5286 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5287 {
5288         __be32 *p;
5289         uint32_t opnum;
5290         int32_t nfserr;
5291
5292         p = xdr_inline_decode(xdr, 8);
5293         if (unlikely(!p))
5294                 goto out_overflow;
5295         opnum = be32_to_cpup(p++);
5296         if (opnum != OP_SETCLIENTID) {
5297                 dprintk("nfs: decode_setclientid: Server returned operation"
5298                         " %d\n", opnum);
5299                 return -EIO;
5300         }
5301         nfserr = be32_to_cpup(p);
5302         if (nfserr == NFS_OK) {
5303                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5304                 if (unlikely(!p))
5305                         goto out_overflow;
5306                 p = xdr_decode_hyper(p, &res->clientid);
5307                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5308         } else if (nfserr == NFSERR_CLID_INUSE) {
5309                 uint32_t len;
5310
5311                 /* skip netid string */
5312                 p = xdr_inline_decode(xdr, 4);
5313                 if (unlikely(!p))
5314                         goto out_overflow;
5315                 len = be32_to_cpup(p);
5316                 p = xdr_inline_decode(xdr, len);
5317                 if (unlikely(!p))
5318                         goto out_overflow;
5319
5320                 /* skip uaddr string */
5321                 p = xdr_inline_decode(xdr, 4);
5322                 if (unlikely(!p))
5323                         goto out_overflow;
5324                 len = be32_to_cpup(p);
5325                 p = xdr_inline_decode(xdr, len);
5326                 if (unlikely(!p))
5327                         goto out_overflow;
5328                 return -NFSERR_CLID_INUSE;
5329         } else
5330                 return nfs4_stat_to_errno(nfserr);
5331
5332         return 0;
5333 out_overflow:
5334         print_overflow_msg(__func__, xdr);
5335         return -EIO;
5336 }
5337
5338 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5339 {
5340         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5341 }
5342
5343 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5344 {
5345         __be32 *p;
5346         int status;
5347
5348         status = decode_op_hdr(xdr, OP_WRITE);
5349         if (status)
5350                 return status;
5351
5352         p = xdr_inline_decode(xdr, 8);
5353         if (unlikely(!p))
5354                 goto out_overflow;
5355         res->count = be32_to_cpup(p++);
5356         res->verf->committed = be32_to_cpup(p++);
5357         return decode_write_verifier(xdr, &res->verf->verifier);
5358 out_overflow:
5359         print_overflow_msg(__func__, xdr);
5360         return -EIO;
5361 }
5362
5363 static int decode_delegreturn(struct xdr_stream *xdr)
5364 {
5365         return decode_op_hdr(xdr, OP_DELEGRETURN);
5366 }
5367
5368 static int decode_secinfo_gss(struct xdr_stream *xdr,
5369                               struct nfs4_secinfo4 *flavor)
5370 {
5371         u32 oid_len;
5372         __be32 *p;
5373
5374         p = xdr_inline_decode(xdr, 4);
5375         if (unlikely(!p))
5376                 goto out_overflow;
5377         oid_len = be32_to_cpup(p);
5378         if (oid_len > GSS_OID_MAX_LEN)
5379                 goto out_err;
5380
5381         p = xdr_inline_decode(xdr, oid_len);
5382         if (unlikely(!p))
5383                 goto out_overflow;
5384         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5385         flavor->flavor_info.oid.len = oid_len;
5386
5387         p = xdr_inline_decode(xdr, 8);
5388         if (unlikely(!p))
5389                 goto out_overflow;
5390         flavor->flavor_info.qop = be32_to_cpup(p++);
5391         flavor->flavor_info.service = be32_to_cpup(p);
5392
5393         return 0;
5394
5395 out_overflow:
5396         print_overflow_msg(__func__, xdr);
5397         return -EIO;
5398 out_err:
5399         return -EINVAL;
5400 }
5401
5402 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5403 {
5404         struct nfs4_secinfo4 *sec_flavor;
5405         unsigned int i, num_flavors;
5406         int status;
5407         __be32 *p;
5408
5409         p = xdr_inline_decode(xdr, 4);
5410         if (unlikely(!p))
5411                 goto out_overflow;
5412
5413         res->flavors->num_flavors = 0;
5414         num_flavors = be32_to_cpup(p);
5415
5416         for (i = 0; i < num_flavors; i++) {
5417                 sec_flavor = &res->flavors->flavors[i];
5418                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5419                         break;
5420
5421                 p = xdr_inline_decode(xdr, 4);
5422                 if (unlikely(!p))
5423                         goto out_overflow;
5424                 sec_flavor->flavor = be32_to_cpup(p);
5425
5426                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5427                         status = decode_secinfo_gss(xdr, sec_flavor);
5428                         if (status)
5429                                 goto out;
5430                 }
5431                 res->flavors->num_flavors++;
5432         }
5433
5434         status = 0;
5435 out:
5436         return status;
5437 out_overflow:
5438         print_overflow_msg(__func__, xdr);
5439         return -EIO;
5440 }
5441
5442 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5443 {
5444         int status = decode_op_hdr(xdr, OP_SECINFO);
5445         if (status)
5446                 return status;
5447         return decode_secinfo_common(xdr, res);
5448 }
5449
5450 #if defined(CONFIG_NFS_V4_1)
5451 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5452 {
5453         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5454         if (status)
5455                 return status;
5456         return decode_secinfo_common(xdr, res);
5457 }
5458
5459 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5460 {
5461         __be32 *p;
5462         uint32_t bitmap_words;
5463         unsigned int i;
5464
5465         p = xdr_inline_decode(xdr, 4);
5466         bitmap_words = be32_to_cpup(p++);
5467         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5468                 return -EIO;
5469         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5470         for (i = 0; i < bitmap_words; i++)
5471                 op_map->u.words[i] = be32_to_cpup(p++);
5472
5473         return 0;
5474 }
5475
5476 static int decode_exchange_id(struct xdr_stream *xdr,
5477                               struct nfs41_exchange_id_res *res)
5478 {
5479         __be32 *p;
5480         uint32_t dummy;
5481         char *dummy_str;
5482         int status;
5483         uint32_t impl_id_count;
5484
5485         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5486         if (status)
5487                 return status;
5488
5489         p = xdr_inline_decode(xdr, 8);
5490         if (unlikely(!p))
5491                 goto out_overflow;
5492         xdr_decode_hyper(p, &res->clientid);
5493         p = xdr_inline_decode(xdr, 12);
5494         if (unlikely(!p))
5495                 goto out_overflow;
5496         res->seqid = be32_to_cpup(p++);
5497         res->flags = be32_to_cpup(p++);
5498
5499         res->state_protect.how = be32_to_cpup(p);
5500         switch (res->state_protect.how) {
5501         case SP4_NONE:
5502                 break;
5503         case SP4_MACH_CRED:
5504                 status = decode_op_map(xdr, &res->state_protect.enforce);
5505                 if (status)
5506                         return status;
5507                 status = decode_op_map(xdr, &res->state_protect.allow);
5508                 if (status)
5509                         return status;
5510                 break;
5511         default:
5512                 WARN_ON_ONCE(1);
5513                 return -EIO;
5514         }
5515
5516         /* server_owner4.so_minor_id */
5517         p = xdr_inline_decode(xdr, 8);
5518         if (unlikely(!p))
5519                 goto out_overflow;
5520         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5521
5522         /* server_owner4.so_major_id */
5523         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5524         if (unlikely(status))
5525                 return status;
5526         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5527                 return -EIO;
5528         memcpy(res->server_owner->major_id, dummy_str, dummy);
5529         res->server_owner->major_id_sz = dummy;
5530
5531         /* server_scope4 */
5532         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5533         if (unlikely(status))
5534                 return status;
5535         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5536                 return -EIO;
5537         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5538         res->server_scope->server_scope_sz = dummy;
5539
5540         /* Implementation Id */
5541         p = xdr_inline_decode(xdr, 4);
5542         if (unlikely(!p))
5543                 goto out_overflow;
5544         impl_id_count = be32_to_cpup(p++);
5545
5546         if (impl_id_count) {
5547                 /* nii_domain */
5548                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5549                 if (unlikely(status))
5550                         return status;
5551                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5552                         return -EIO;
5553                 memcpy(res->impl_id->domain, dummy_str, dummy);
5554
5555                 /* nii_name */
5556                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5557                 if (unlikely(status))
5558                         return status;
5559                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5560                         return -EIO;
5561                 memcpy(res->impl_id->name, dummy_str, dummy);
5562
5563                 /* nii_date */
5564                 p = xdr_inline_decode(xdr, 12);
5565                 if (unlikely(!p))
5566                         goto out_overflow;
5567                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5568                 res->impl_id->date.nseconds = be32_to_cpup(p);
5569
5570                 /* if there's more than one entry, ignore the rest */
5571         }
5572         return 0;
5573 out_overflow:
5574         print_overflow_msg(__func__, xdr);
5575         return -EIO;
5576 }
5577
5578 static int decode_chan_attrs(struct xdr_stream *xdr,
5579                              struct nfs4_channel_attrs *attrs)
5580 {
5581         __be32 *p;
5582         u32 nr_attrs, val;
5583
5584         p = xdr_inline_decode(xdr, 28);
5585         if (unlikely(!p))
5586                 goto out_overflow;
5587         val = be32_to_cpup(p++);        /* headerpadsz */
5588         if (val)
5589                 return -EINVAL;         /* no support for header padding yet */
5590         attrs->max_rqst_sz = be32_to_cpup(p++);
5591         attrs->max_resp_sz = be32_to_cpup(p++);
5592         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5593         attrs->max_ops = be32_to_cpup(p++);
5594         attrs->max_reqs = be32_to_cpup(p++);
5595         nr_attrs = be32_to_cpup(p);
5596         if (unlikely(nr_attrs > 1)) {
5597                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5598                         "count %u\n", __func__, nr_attrs);
5599                 return -EINVAL;
5600         }
5601         if (nr_attrs == 1) {
5602                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5603                 if (unlikely(!p))
5604                         goto out_overflow;
5605         }
5606         return 0;
5607 out_overflow:
5608         print_overflow_msg(__func__, xdr);
5609         return -EIO;
5610 }
5611
5612 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5613 {
5614         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5615 }
5616
5617 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5618                                 struct nfs41_bind_conn_to_session_res *res)
5619 {
5620         __be32 *p;
5621         int status;
5622
5623         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5624         if (!status)
5625                 status = decode_sessionid(xdr, &res->session->sess_id);
5626         if (unlikely(status))
5627                 return status;
5628
5629         /* dir flags, rdma mode bool */
5630         p = xdr_inline_decode(xdr, 8);
5631         if (unlikely(!p))
5632                 goto out_overflow;
5633
5634         res->dir = be32_to_cpup(p++);
5635         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5636                 return -EIO;
5637         if (be32_to_cpup(p) == 0)
5638                 res->use_conn_in_rdma_mode = false;
5639         else
5640                 res->use_conn_in_rdma_mode = true;
5641
5642         return 0;
5643 out_overflow:
5644         print_overflow_msg(__func__, xdr);
5645         return -EIO;
5646 }
5647
5648 static int decode_create_session(struct xdr_stream *xdr,
5649                                  struct nfs41_create_session_res *res)
5650 {
5651         __be32 *p;
5652         int status;
5653         struct nfs_client *clp = res->client;
5654         struct nfs4_session *session = clp->cl_session;
5655
5656         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5657         if (!status)
5658                 status = decode_sessionid(xdr, &session->sess_id);
5659         if (unlikely(status))
5660                 return status;
5661
5662         /* seqid, flags */
5663         p = xdr_inline_decode(xdr, 8);
5664         if (unlikely(!p))
5665                 goto out_overflow;
5666         clp->cl_seqid = be32_to_cpup(p++);
5667         session->flags = be32_to_cpup(p);
5668
5669         /* Channel attributes */
5670         status = decode_chan_attrs(xdr, &session->fc_attrs);
5671         if (!status)
5672                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5673         return status;
5674 out_overflow:
5675         print_overflow_msg(__func__, xdr);
5676         return -EIO;
5677 }
5678
5679 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5680 {
5681         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5682 }
5683
5684 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5685 {
5686         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5687 }
5688
5689 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5690 {
5691         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5692 }
5693 #endif /* CONFIG_NFS_V4_1 */
5694
5695 static int decode_sequence(struct xdr_stream *xdr,
5696                            struct nfs4_sequence_res *res,
5697                            struct rpc_rqst *rqstp)
5698 {
5699 #if defined(CONFIG_NFS_V4_1)
5700         struct nfs4_session *session;
5701         struct nfs4_sessionid id;
5702         u32 dummy;
5703         int status;
5704         __be32 *p;
5705
5706         if (res->sr_slot == NULL)
5707                 return 0;
5708         if (!res->sr_slot->table->session)
5709                 return 0;
5710
5711         status = decode_op_hdr(xdr, OP_SEQUENCE);
5712         if (!status)
5713                 status = decode_sessionid(xdr, &id);
5714         if (unlikely(status))
5715                 goto out_err;
5716
5717         /*
5718          * If the server returns different values for sessionID, slotID or
5719          * sequence number, the server is looney tunes.
5720          */
5721         status = -EREMOTEIO;
5722         session = res->sr_slot->table->session;
5723
5724         if (memcmp(id.data, session->sess_id.data,
5725                    NFS4_MAX_SESSIONID_LEN)) {
5726                 dprintk("%s Invalid session id\n", __func__);
5727                 goto out_err;
5728         }
5729
5730         p = xdr_inline_decode(xdr, 20);
5731         if (unlikely(!p))
5732                 goto out_overflow;
5733
5734         /* seqid */
5735         dummy = be32_to_cpup(p++);
5736         if (dummy != res->sr_slot->seq_nr) {
5737                 dprintk("%s Invalid sequence number\n", __func__);
5738                 goto out_err;
5739         }
5740         /* slot id */
5741         dummy = be32_to_cpup(p++);
5742         if (dummy != res->sr_slot->slot_nr) {
5743                 dprintk("%s Invalid slot id\n", __func__);
5744                 goto out_err;
5745         }
5746         /* highest slot id */
5747         res->sr_highest_slotid = be32_to_cpup(p++);
5748         /* target highest slot id */
5749         res->sr_target_highest_slotid = be32_to_cpup(p++);
5750         /* result flags */
5751         res->sr_status_flags = be32_to_cpup(p);
5752         status = 0;
5753 out_err:
5754         res->sr_status = status;
5755         return status;
5756 out_overflow:
5757         print_overflow_msg(__func__, xdr);
5758         status = -EIO;
5759         goto out_err;
5760 #else  /* CONFIG_NFS_V4_1 */
5761         return 0;
5762 #endif /* CONFIG_NFS_V4_1 */
5763 }
5764
5765 #if defined(CONFIG_NFS_V4_1)
5766 /*
5767  * TODO: Need to handle case when EOF != true;
5768  */
5769 static int decode_getdevicelist(struct xdr_stream *xdr,
5770                                 struct pnfs_devicelist *res)
5771 {
5772         __be32 *p;
5773         int status, i;
5774         nfs4_verifier verftemp;
5775
5776         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5777         if (status)
5778                 return status;
5779
5780         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5781         if (unlikely(!p))
5782                 goto out_overflow;
5783
5784         /* TODO: Skip cookie for now */
5785         p += 2;
5786
5787         /* Read verifier */
5788         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5789
5790         res->num_devs = be32_to_cpup(p);
5791
5792         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5793
5794         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5795                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5796                                 __func__, res->num_devs);
5797                 return -EIO;
5798         }
5799
5800         p = xdr_inline_decode(xdr,
5801                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5802         if (unlikely(!p))
5803                 goto out_overflow;
5804         for (i = 0; i < res->num_devs; i++)
5805                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5806                                             NFS4_DEVICEID4_SIZE);
5807         res->eof = be32_to_cpup(p);
5808         return 0;
5809 out_overflow:
5810         print_overflow_msg(__func__, xdr);
5811         return -EIO;
5812 }
5813
5814 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5815                                 struct pnfs_device *pdev)
5816 {
5817         __be32 *p;
5818         uint32_t len, type;
5819         int status;
5820
5821         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5822         if (status) {
5823                 if (status == -ETOOSMALL) {
5824                         p = xdr_inline_decode(xdr, 4);
5825                         if (unlikely(!p))
5826                                 goto out_overflow;
5827                         pdev->mincount = be32_to_cpup(p);
5828                         dprintk("%s: Min count too small. mincnt = %u\n",
5829                                 __func__, pdev->mincount);
5830                 }
5831                 return status;
5832         }
5833
5834         p = xdr_inline_decode(xdr, 8);
5835         if (unlikely(!p))
5836                 goto out_overflow;
5837         type = be32_to_cpup(p++);
5838         if (type != pdev->layout_type) {
5839                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5840                         __func__, pdev->layout_type, type);
5841                 return -EINVAL;
5842         }
5843         /*
5844          * Get the length of the opaque device_addr4. xdr_read_pages places
5845          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5846          * and places the remaining xdr data in xdr_buf->tail
5847          */
5848         pdev->mincount = be32_to_cpup(p);
5849         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5850                 goto out_overflow;
5851
5852         /* Parse notification bitmap, verifying that it is zero. */
5853         p = xdr_inline_decode(xdr, 4);
5854         if (unlikely(!p))
5855                 goto out_overflow;
5856         len = be32_to_cpup(p);
5857         if (len) {
5858                 uint32_t i;
5859
5860                 p = xdr_inline_decode(xdr, 4 * len);
5861                 if (unlikely(!p))
5862                         goto out_overflow;
5863                 for (i = 0; i < len; i++, p++) {
5864                         if (be32_to_cpup(p)) {
5865                                 dprintk("%s: notifications not supported\n",
5866                                         __func__);
5867                                 return -EIO;
5868                         }
5869                 }
5870         }
5871         return 0;
5872 out_overflow:
5873         print_overflow_msg(__func__, xdr);
5874         return -EIO;
5875 }
5876
5877 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5878                             struct nfs4_layoutget_res *res)
5879 {
5880         __be32 *p;
5881         int status;
5882         u32 layout_count;
5883         u32 recvd;
5884
5885         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5886         if (status)
5887                 return status;
5888         p = xdr_inline_decode(xdr, 4);
5889         if (unlikely(!p))
5890                 goto out_overflow;
5891         res->return_on_close = be32_to_cpup(p);
5892         decode_stateid(xdr, &res->stateid);
5893         p = xdr_inline_decode(xdr, 4);
5894         if (unlikely(!p))
5895                 goto out_overflow;
5896         layout_count = be32_to_cpup(p);
5897         if (!layout_count) {
5898                 dprintk("%s: server responded with empty layout array\n",
5899                         __func__);
5900                 return -EINVAL;
5901         }
5902
5903         p = xdr_inline_decode(xdr, 28);
5904         if (unlikely(!p))
5905                 goto out_overflow;
5906         p = xdr_decode_hyper(p, &res->range.offset);
5907         p = xdr_decode_hyper(p, &res->range.length);
5908         res->range.iomode = be32_to_cpup(p++);
5909         res->type = be32_to_cpup(p++);
5910         res->layoutp->len = be32_to_cpup(p);
5911
5912         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5913                 __func__,
5914                 (unsigned long)res->range.offset,
5915                 (unsigned long)res->range.length,
5916                 res->range.iomode,
5917                 res->type,
5918                 res->layoutp->len);
5919
5920         recvd = xdr_read_pages(xdr, res->layoutp->len);
5921         if (res->layoutp->len > recvd) {
5922                 dprintk("NFS: server cheating in layoutget reply: "
5923                                 "layout len %u > recvd %u\n",
5924                                 res->layoutp->len, recvd);
5925                 return -EINVAL;
5926         }
5927
5928         if (layout_count > 1) {
5929                 /* We only handle a length one array at the moment.  Any
5930                  * further entries are just ignored.  Note that this means
5931                  * the client may see a response that is less than the
5932                  * minimum it requested.
5933                  */
5934                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5935                         __func__, layout_count);
5936         }
5937
5938         return 0;
5939 out_overflow:
5940         print_overflow_msg(__func__, xdr);
5941         return -EIO;
5942 }
5943
5944 static int decode_layoutreturn(struct xdr_stream *xdr,
5945                                struct nfs4_layoutreturn_res *res)
5946 {
5947         __be32 *p;
5948         int status;
5949
5950         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5951         if (status)
5952                 return status;
5953         p = xdr_inline_decode(xdr, 4);
5954         if (unlikely(!p))
5955                 goto out_overflow;
5956         res->lrs_present = be32_to_cpup(p);
5957         if (res->lrs_present)
5958                 status = decode_stateid(xdr, &res->stateid);
5959         return status;
5960 out_overflow:
5961         print_overflow_msg(__func__, xdr);
5962         return -EIO;
5963 }
5964
5965 static int decode_layoutcommit(struct xdr_stream *xdr,
5966                                struct rpc_rqst *req,
5967                                struct nfs4_layoutcommit_res *res)
5968 {
5969         __be32 *p;
5970         __u32 sizechanged;
5971         int status;
5972
5973         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5974         res->status = status;
5975         if (status)
5976                 return status;
5977
5978         p = xdr_inline_decode(xdr, 4);
5979         if (unlikely(!p))
5980                 goto out_overflow;
5981         sizechanged = be32_to_cpup(p);
5982
5983         if (sizechanged) {
5984                 /* throw away new size */
5985                 p = xdr_inline_decode(xdr, 8);
5986                 if (unlikely(!p))
5987                         goto out_overflow;
5988         }
5989         return 0;
5990 out_overflow:
5991         print_overflow_msg(__func__, xdr);
5992         return -EIO;
5993 }
5994
5995 static int decode_test_stateid(struct xdr_stream *xdr,
5996                                struct nfs41_test_stateid_res *res)
5997 {
5998         __be32 *p;
5999         int status;
6000         int num_res;
6001
6002         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6003         if (status)
6004                 return status;
6005
6006         p = xdr_inline_decode(xdr, 4);
6007         if (unlikely(!p))
6008                 goto out_overflow;
6009         num_res = be32_to_cpup(p++);
6010         if (num_res != 1)
6011                 goto out;
6012
6013         p = xdr_inline_decode(xdr, 4);
6014         if (unlikely(!p))
6015                 goto out_overflow;
6016         res->status = be32_to_cpup(p++);
6017
6018         return status;
6019 out_overflow:
6020         print_overflow_msg(__func__, xdr);
6021 out:
6022         return -EIO;
6023 }
6024
6025 static int decode_free_stateid(struct xdr_stream *xdr,
6026                                struct nfs41_free_stateid_res *res)
6027 {
6028         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6029         return res->status;
6030 }
6031 #endif /* CONFIG_NFS_V4_1 */
6032
6033 /*
6034  * END OF "GENERIC" DECODE ROUTINES.
6035  */
6036
6037 /*
6038  * Decode OPEN_DOWNGRADE response
6039  */
6040 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6041                                        struct xdr_stream *xdr,
6042                                        struct nfs_closeres *res)
6043 {
6044         struct compound_hdr hdr;
6045         int status;
6046
6047         status = decode_compound_hdr(xdr, &hdr);
6048         if (status)
6049                 goto out;
6050         status = decode_sequence(xdr, &res->seq_res, rqstp);
6051         if (status)
6052                 goto out;
6053         status = decode_putfh(xdr);
6054         if (status)
6055                 goto out;
6056         status = decode_open_downgrade(xdr, res);
6057         if (status != 0)
6058                 goto out;
6059         decode_getfattr(xdr, res->fattr, res->server);
6060 out:
6061         return status;
6062 }
6063
6064 /*
6065  * Decode ACCESS response
6066  */
6067 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6068                                struct nfs4_accessres *res)
6069 {
6070         struct compound_hdr hdr;
6071         int status;
6072
6073         status = decode_compound_hdr(xdr, &hdr);
6074         if (status)
6075                 goto out;
6076         status = decode_sequence(xdr, &res->seq_res, rqstp);
6077         if (status)
6078                 goto out;
6079         status = decode_putfh(xdr);
6080         if (status != 0)
6081                 goto out;
6082         status = decode_access(xdr, &res->supported, &res->access);
6083         if (status != 0)
6084                 goto out;
6085         decode_getfattr(xdr, res->fattr, res->server);
6086 out:
6087         return status;
6088 }
6089
6090 /*
6091  * Decode LOOKUP response
6092  */
6093 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094                                struct nfs4_lookup_res *res)
6095 {
6096         struct compound_hdr hdr;
6097         int status;
6098
6099         status = decode_compound_hdr(xdr, &hdr);
6100         if (status)
6101                 goto out;
6102         status = decode_sequence(xdr, &res->seq_res, rqstp);
6103         if (status)
6104                 goto out;
6105         status = decode_putfh(xdr);
6106         if (status)
6107                 goto out;
6108         status = decode_lookup(xdr);
6109         if (status)
6110                 goto out;
6111         status = decode_getfh(xdr, res->fh);
6112         if (status)
6113                 goto out;
6114         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6115 out:
6116         return status;
6117 }
6118
6119 /*
6120  * Decode LOOKUP_ROOT response
6121  */
6122 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6123                                     struct xdr_stream *xdr,
6124                                     struct nfs4_lookup_res *res)
6125 {
6126         struct compound_hdr hdr;
6127         int status;
6128
6129         status = decode_compound_hdr(xdr, &hdr);
6130         if (status)
6131                 goto out;
6132         status = decode_sequence(xdr, &res->seq_res, rqstp);
6133         if (status)
6134                 goto out;
6135         status = decode_putrootfh(xdr);
6136         if (status)
6137                 goto out;
6138         status = decode_getfh(xdr, res->fh);
6139         if (status == 0)
6140                 status = decode_getfattr_label(xdr, res->fattr,
6141                                                 res->label, res->server);
6142 out:
6143         return status;
6144 }
6145
6146 /*
6147  * Decode REMOVE response
6148  */
6149 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6150                                struct nfs_removeres *res)
6151 {
6152         struct compound_hdr hdr;
6153         int status;
6154
6155         status = decode_compound_hdr(xdr, &hdr);
6156         if (status)
6157                 goto out;
6158         status = decode_sequence(xdr, &res->seq_res, rqstp);
6159         if (status)
6160                 goto out;
6161         status = decode_putfh(xdr);
6162         if (status)
6163                 goto out;
6164         status = decode_remove(xdr, &res->cinfo);
6165 out:
6166         return status;
6167 }
6168
6169 /*
6170  * Decode RENAME response
6171  */
6172 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6173                                struct nfs_renameres *res)
6174 {
6175         struct compound_hdr hdr;
6176         int status;
6177
6178         status = decode_compound_hdr(xdr, &hdr);
6179         if (status)
6180                 goto out;
6181         status = decode_sequence(xdr, &res->seq_res, rqstp);
6182         if (status)
6183                 goto out;
6184         status = decode_putfh(xdr);
6185         if (status)
6186                 goto out;
6187         status = decode_savefh(xdr);
6188         if (status)
6189                 goto out;
6190         status = decode_putfh(xdr);
6191         if (status)
6192                 goto out;
6193         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6194 out:
6195         return status;
6196 }
6197
6198 /*
6199  * Decode LINK response
6200  */
6201 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6202                              struct nfs4_link_res *res)
6203 {
6204         struct compound_hdr hdr;
6205         int status;
6206
6207         status = decode_compound_hdr(xdr, &hdr);
6208         if (status)
6209                 goto out;
6210         status = decode_sequence(xdr, &res->seq_res, rqstp);
6211         if (status)
6212                 goto out;
6213         status = decode_putfh(xdr);
6214         if (status)
6215                 goto out;
6216         status = decode_savefh(xdr);
6217         if (status)
6218                 goto out;
6219         status = decode_putfh(xdr);
6220         if (status)
6221                 goto out;
6222         status = decode_link(xdr, &res->cinfo);
6223         if (status)
6224                 goto out;
6225         /*
6226          * Note order: OP_LINK leaves the directory as the current
6227          *             filehandle.
6228          */
6229         status = decode_restorefh(xdr);
6230         if (status)
6231                 goto out;
6232         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6233 out:
6234         return status;
6235 }
6236
6237 /*
6238  * Decode CREATE response
6239  */
6240 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241                                struct nfs4_create_res *res)
6242 {
6243         struct compound_hdr hdr;
6244         int status;
6245
6246         status = decode_compound_hdr(xdr, &hdr);
6247         if (status)
6248                 goto out;
6249         status = decode_sequence(xdr, &res->seq_res, rqstp);
6250         if (status)
6251                 goto out;
6252         status = decode_putfh(xdr);
6253         if (status)
6254                 goto out;
6255         status = decode_create(xdr, &res->dir_cinfo);
6256         if (status)
6257                 goto out;
6258         status = decode_getfh(xdr, res->fh);
6259         if (status)
6260                 goto out;
6261         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6262 out:
6263         return status;
6264 }
6265
6266 /*
6267  * Decode SYMLINK response
6268  */
6269 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6270                                 struct nfs4_create_res *res)
6271 {
6272         return nfs4_xdr_dec_create(rqstp, xdr, res);
6273 }
6274
6275 /*
6276  * Decode GETATTR response
6277  */
6278 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                                 struct nfs4_getattr_res *res)
6280 {
6281         struct compound_hdr hdr;
6282         int status;
6283
6284         status = decode_compound_hdr(xdr, &hdr);
6285         if (status)
6286                 goto out;
6287         status = decode_sequence(xdr, &res->seq_res, rqstp);
6288         if (status)
6289                 goto out;
6290         status = decode_putfh(xdr);
6291         if (status)
6292                 goto out;
6293         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6294 out:
6295         return status;
6296 }
6297
6298 /*
6299  * Encode an SETACL request
6300  */
6301 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6302                                 struct nfs_setaclargs *args)
6303 {
6304         struct compound_hdr hdr = {
6305                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6306         };
6307
6308         encode_compound_hdr(xdr, req, &hdr);
6309         encode_sequence(xdr, &args->seq_args, &hdr);
6310         encode_putfh(xdr, args->fh, &hdr);
6311         encode_setacl(xdr, args, &hdr);
6312         encode_nops(&hdr);
6313 }
6314
6315 /*
6316  * Decode SETACL response
6317  */
6318 static int
6319 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6320                     struct nfs_setaclres *res)
6321 {
6322         struct compound_hdr hdr;
6323         int status;
6324
6325         status = decode_compound_hdr(xdr, &hdr);
6326         if (status)
6327                 goto out;
6328         status = decode_sequence(xdr, &res->seq_res, rqstp);
6329         if (status)
6330                 goto out;
6331         status = decode_putfh(xdr);
6332         if (status)
6333                 goto out;
6334         status = decode_setattr(xdr);
6335 out:
6336         return status;
6337 }
6338
6339 /*
6340  * Decode GETACL response
6341  */
6342 static int
6343 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6344                     struct nfs_getaclres *res)
6345 {
6346         struct compound_hdr hdr;
6347         int status;
6348
6349         if (res->acl_scratch != NULL) {
6350                 void *p = page_address(res->acl_scratch);
6351                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6352         }
6353         status = decode_compound_hdr(xdr, &hdr);
6354         if (status)
6355                 goto out;
6356         status = decode_sequence(xdr, &res->seq_res, rqstp);
6357         if (status)
6358                 goto out;
6359         status = decode_putfh(xdr);
6360         if (status)
6361                 goto out;
6362         status = decode_getacl(xdr, rqstp, res);
6363
6364 out:
6365         return status;
6366 }
6367
6368 /*
6369  * Decode CLOSE response
6370  */
6371 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6372                               struct nfs_closeres *res)
6373 {
6374         struct compound_hdr hdr;
6375         int status;
6376
6377         status = decode_compound_hdr(xdr, &hdr);
6378         if (status)
6379                 goto out;
6380         status = decode_sequence(xdr, &res->seq_res, rqstp);
6381         if (status)
6382                 goto out;
6383         status = decode_putfh(xdr);
6384         if (status)
6385                 goto out;
6386         status = decode_close(xdr, res);
6387         if (status != 0)
6388                 goto out;
6389         /*
6390          * Note: Server may do delete on close for this file
6391          *      in which case the getattr call will fail with
6392          *      an ESTALE error. Shouldn't be a problem,
6393          *      though, since fattr->valid will remain unset.
6394          */
6395         decode_getfattr(xdr, res->fattr, res->server);
6396 out:
6397         return status;
6398 }
6399
6400 /*
6401  * Decode OPEN response
6402  */
6403 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404                              struct nfs_openres *res)
6405 {
6406         struct compound_hdr hdr;
6407         int status;
6408
6409         status = decode_compound_hdr(xdr, &hdr);
6410         if (status)
6411                 goto out;
6412         status = decode_sequence(xdr, &res->seq_res, rqstp);
6413         if (status)
6414                 goto out;
6415         status = decode_putfh(xdr);
6416         if (status)
6417                 goto out;
6418         status = decode_open(xdr, res);
6419         if (status)
6420                 goto out;
6421         status = decode_getfh(xdr, &res->fh);
6422         if (status)
6423                 goto out;
6424         if (res->access_request)
6425                 decode_access(xdr, &res->access_supported, &res->access_result);
6426         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6427 out:
6428         return status;
6429 }
6430
6431 /*
6432  * Decode OPEN_CONFIRM response
6433  */
6434 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6435                                      struct xdr_stream *xdr,
6436                                      struct nfs_open_confirmres *res)
6437 {
6438         struct compound_hdr hdr;
6439         int status;
6440
6441         status = decode_compound_hdr(xdr, &hdr);
6442         if (status)
6443                 goto out;
6444         status = decode_putfh(xdr);
6445         if (status)
6446                 goto out;
6447         status = decode_open_confirm(xdr, res);
6448 out:
6449         return status;
6450 }
6451
6452 /*
6453  * Decode OPEN response
6454  */
6455 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6456                                     struct xdr_stream *xdr,
6457                                     struct nfs_openres *res)
6458 {
6459         struct compound_hdr hdr;
6460         int status;
6461
6462         status = decode_compound_hdr(xdr, &hdr);
6463         if (status)
6464                 goto out;
6465         status = decode_sequence(xdr, &res->seq_res, rqstp);
6466         if (status)
6467                 goto out;
6468         status = decode_putfh(xdr);
6469         if (status)
6470                 goto out;
6471         status = decode_open(xdr, res);
6472         if (status)
6473                 goto out;
6474         if (res->access_request)
6475                 decode_access(xdr, &res->access_supported, &res->access_result);
6476         decode_getfattr(xdr, res->f_attr, res->server);
6477 out:
6478         return status;
6479 }
6480
6481 /*
6482  * Decode SETATTR response
6483  */
6484 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6485                                 struct xdr_stream *xdr,
6486                                 struct nfs_setattrres *res)
6487 {
6488         struct compound_hdr hdr;
6489         int status;
6490
6491         status = decode_compound_hdr(xdr, &hdr);
6492         if (status)
6493                 goto out;
6494         status = decode_sequence(xdr, &res->seq_res, rqstp);
6495         if (status)
6496                 goto out;
6497         status = decode_putfh(xdr);
6498         if (status)
6499                 goto out;
6500         status = decode_setattr(xdr);
6501         if (status)
6502                 goto out;
6503         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6504 out:
6505         return status;
6506 }
6507
6508 /*
6509  * Decode LOCK response
6510  */
6511 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                              struct nfs_lock_res *res)
6513 {
6514         struct compound_hdr hdr;
6515         int status;
6516
6517         status = decode_compound_hdr(xdr, &hdr);
6518         if (status)
6519                 goto out;
6520         status = decode_sequence(xdr, &res->seq_res, rqstp);
6521         if (status)
6522                 goto out;
6523         status = decode_putfh(xdr);
6524         if (status)
6525                 goto out;
6526         status = decode_lock(xdr, res);
6527 out:
6528         return status;
6529 }
6530
6531 /*
6532  * Decode LOCKT response
6533  */
6534 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6535                               struct nfs_lockt_res *res)
6536 {
6537         struct compound_hdr hdr;
6538         int status;
6539
6540         status = decode_compound_hdr(xdr, &hdr);
6541         if (status)
6542                 goto out;
6543         status = decode_sequence(xdr, &res->seq_res, rqstp);
6544         if (status)
6545                 goto out;
6546         status = decode_putfh(xdr);
6547         if (status)
6548                 goto out;
6549         status = decode_lockt(xdr, res);
6550 out:
6551         return status;
6552 }
6553
6554 /*
6555  * Decode LOCKU response
6556  */
6557 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6558                               struct nfs_locku_res *res)
6559 {
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_locku(xdr, res);
6573 out:
6574         return status;
6575 }
6576
6577 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6578                                           struct xdr_stream *xdr, void *dummy)
6579 {
6580         struct compound_hdr hdr;
6581         int status;
6582
6583         status = decode_compound_hdr(xdr, &hdr);
6584         if (!status)
6585                 status = decode_release_lockowner(xdr);
6586         return status;
6587 }
6588
6589 /*
6590  * Decode READLINK response
6591  */
6592 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6593                                  struct xdr_stream *xdr,
6594                                  struct nfs4_readlink_res *res)
6595 {
6596         struct compound_hdr hdr;
6597         int status;
6598
6599         status = decode_compound_hdr(xdr, &hdr);
6600         if (status)
6601                 goto out;
6602         status = decode_sequence(xdr, &res->seq_res, rqstp);
6603         if (status)
6604                 goto out;
6605         status = decode_putfh(xdr);
6606         if (status)
6607                 goto out;
6608         status = decode_readlink(xdr, rqstp);
6609 out:
6610         return status;
6611 }
6612
6613 /*
6614  * Decode READDIR response
6615  */
6616 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6617                                 struct nfs4_readdir_res *res)
6618 {
6619         struct compound_hdr hdr;
6620         int status;
6621
6622         status = decode_compound_hdr(xdr, &hdr);
6623         if (status)
6624                 goto out;
6625         status = decode_sequence(xdr, &res->seq_res, rqstp);
6626         if (status)
6627                 goto out;
6628         status = decode_putfh(xdr);
6629         if (status)
6630                 goto out;
6631         status = decode_readdir(xdr, rqstp, res);
6632 out:
6633         return status;
6634 }
6635
6636 /*
6637  * Decode Read response
6638  */
6639 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6640                              struct nfs_readres *res)
6641 {
6642         struct compound_hdr hdr;
6643         int status;
6644
6645         status = decode_compound_hdr(xdr, &hdr);
6646         if (status)
6647                 goto out;
6648         status = decode_sequence(xdr, &res->seq_res, rqstp);
6649         if (status)
6650                 goto out;
6651         status = decode_putfh(xdr);
6652         if (status)
6653                 goto out;
6654         status = decode_read(xdr, rqstp, res);
6655         if (!status)
6656                 status = res->count;
6657 out:
6658         return status;
6659 }
6660
6661 /*
6662  * Decode WRITE response
6663  */
6664 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6665                               struct nfs_writeres *res)
6666 {
6667         struct compound_hdr hdr;
6668         int status;
6669
6670         status = decode_compound_hdr(xdr, &hdr);
6671         if (status)
6672                 goto out;
6673         status = decode_sequence(xdr, &res->seq_res, rqstp);
6674         if (status)
6675                 goto out;
6676         status = decode_putfh(xdr);
6677         if (status)
6678                 goto out;
6679         status = decode_write(xdr, res);
6680         if (status)
6681                 goto out;
6682         if (res->fattr)
6683                 decode_getfattr(xdr, res->fattr, res->server);
6684         if (!status)
6685                 status = res->count;
6686 out:
6687         return status;
6688 }
6689
6690 /*
6691  * Decode COMMIT response
6692  */
6693 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6694                                struct nfs_commitres *res)
6695 {
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (status)
6701                 goto out;
6702         status = decode_sequence(xdr, &res->seq_res, rqstp);
6703         if (status)
6704                 goto out;
6705         status = decode_putfh(xdr);
6706         if (status)
6707                 goto out;
6708         status = decode_commit(xdr, res);
6709 out:
6710         return status;
6711 }
6712
6713 /*
6714  * Decode FSINFO response
6715  */
6716 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6717                                struct nfs4_fsinfo_res *res)
6718 {
6719         struct compound_hdr hdr;
6720         int status;
6721
6722         status = decode_compound_hdr(xdr, &hdr);
6723         if (!status)
6724                 status = decode_sequence(xdr, &res->seq_res, req);
6725         if (!status)
6726                 status = decode_putfh(xdr);
6727         if (!status)
6728                 status = decode_fsinfo(xdr, res->fsinfo);
6729         return status;
6730 }
6731
6732 /*
6733  * Decode PATHCONF response
6734  */
6735 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6736                                  struct nfs4_pathconf_res *res)
6737 {
6738         struct compound_hdr hdr;
6739         int status;
6740
6741         status = decode_compound_hdr(xdr, &hdr);
6742         if (!status)
6743                 status = decode_sequence(xdr, &res->seq_res, req);
6744         if (!status)
6745                 status = decode_putfh(xdr);
6746         if (!status)
6747                 status = decode_pathconf(xdr, res->pathconf);
6748         return status;
6749 }
6750
6751 /*
6752  * Decode STATFS response
6753  */
6754 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6755                                struct nfs4_statfs_res *res)
6756 {
6757         struct compound_hdr hdr;
6758         int status;
6759
6760         status = decode_compound_hdr(xdr, &hdr);
6761         if (!status)
6762                 status = decode_sequence(xdr, &res->seq_res, req);
6763         if (!status)
6764                 status = decode_putfh(xdr);
6765         if (!status)
6766                 status = decode_statfs(xdr, res->fsstat);
6767         return status;
6768 }
6769
6770 /*
6771  * Decode GETATTR_BITMAP response
6772  */
6773 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6774                                     struct xdr_stream *xdr,
6775                                     struct nfs4_server_caps_res *res)
6776 {
6777         struct compound_hdr hdr;
6778         int status;
6779
6780         status = decode_compound_hdr(xdr, &hdr);
6781         if (status)
6782                 goto out;
6783         status = decode_sequence(xdr, &res->seq_res, req);
6784         if (status)
6785                 goto out;
6786         status = decode_putfh(xdr);
6787         if (status)
6788                 goto out;
6789         status = decode_server_caps(xdr, res);
6790 out:
6791         return status;
6792 }
6793
6794 /*
6795  * Decode RENEW response
6796  */
6797 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6798                               void *__unused)
6799 {
6800         struct compound_hdr hdr;
6801         int status;
6802
6803         status = decode_compound_hdr(xdr, &hdr);
6804         if (!status)
6805                 status = decode_renew(xdr);
6806         return status;
6807 }
6808
6809 /*
6810  * Decode SETCLIENTID response
6811  */
6812 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6813                                     struct xdr_stream *xdr,
6814                                     struct nfs4_setclientid_res *res)
6815 {
6816         struct compound_hdr hdr;
6817         int status;
6818
6819         status = decode_compound_hdr(xdr, &hdr);
6820         if (!status)
6821                 status = decode_setclientid(xdr, res);
6822         return status;
6823 }
6824
6825 /*
6826  * Decode SETCLIENTID_CONFIRM response
6827  */
6828 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6829                                             struct xdr_stream *xdr)
6830 {
6831         struct compound_hdr hdr;
6832         int status;
6833
6834         status = decode_compound_hdr(xdr, &hdr);
6835         if (!status)
6836                 status = decode_setclientid_confirm(xdr);
6837         return status;
6838 }
6839
6840 /*
6841  * Decode DELEGRETURN response
6842  */
6843 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6844                                     struct xdr_stream *xdr,
6845                                     struct nfs4_delegreturnres *res)
6846 {
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         if (status)
6852                 goto out;
6853         status = decode_sequence(xdr, &res->seq_res, rqstp);
6854         if (status)
6855                 goto out;
6856         status = decode_putfh(xdr);
6857         if (status != 0)
6858                 goto out;
6859         status = decode_getfattr(xdr, res->fattr, res->server);
6860         if (status != 0)
6861                 goto out;
6862         status = decode_delegreturn(xdr);
6863 out:
6864         return status;
6865 }
6866
6867 /*
6868  * Decode FS_LOCATIONS response
6869  */
6870 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6871                                      struct xdr_stream *xdr,
6872                                      struct nfs4_fs_locations_res *res)
6873 {
6874         struct compound_hdr hdr;
6875         int status;
6876
6877         status = decode_compound_hdr(xdr, &hdr);
6878         if (status)
6879                 goto out;
6880         status = decode_sequence(xdr, &res->seq_res, req);
6881         if (status)
6882                 goto out;
6883         status = decode_putfh(xdr);
6884         if (status)
6885                 goto out;
6886         if (res->migration) {
6887                 xdr_enter_page(xdr, PAGE_SIZE);
6888                 status = decode_getfattr_generic(xdr,
6889                                         &res->fs_locations->fattr,
6890                                          NULL, res->fs_locations,
6891                                          NULL, res->fs_locations->server);
6892                 if (status)
6893                         goto out;
6894                 if (res->renew)
6895                         status = decode_renew(xdr);
6896         } else {
6897                 status = decode_lookup(xdr);
6898                 if (status)
6899                         goto out;
6900                 xdr_enter_page(xdr, PAGE_SIZE);
6901                 status = decode_getfattr_generic(xdr,
6902                                         &res->fs_locations->fattr,
6903                                          NULL, res->fs_locations,
6904                                          NULL, res->fs_locations->server);
6905         }
6906 out:
6907         return status;
6908 }
6909
6910 /*
6911  * Decode SECINFO response
6912  */
6913 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6914                                 struct xdr_stream *xdr,
6915                                 struct nfs4_secinfo_res *res)
6916 {
6917         struct compound_hdr hdr;
6918         int status;
6919
6920         status = decode_compound_hdr(xdr, &hdr);
6921         if (status)
6922                 goto out;
6923         status = decode_sequence(xdr, &res->seq_res, rqstp);
6924         if (status)
6925                 goto out;
6926         status = decode_putfh(xdr);
6927         if (status)
6928                 goto out;
6929         status = decode_secinfo(xdr, res);
6930 out:
6931         return status;
6932 }
6933
6934 /*
6935  * Decode FSID_PRESENT response
6936  */
6937 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6938                                      struct xdr_stream *xdr,
6939                                      struct nfs4_fsid_present_res *res)
6940 {
6941         struct compound_hdr hdr;
6942         int status;
6943
6944         status = decode_compound_hdr(xdr, &hdr);
6945         if (status)
6946                 goto out;
6947         status = decode_sequence(xdr, &res->seq_res, rqstp);
6948         if (status)
6949                 goto out;
6950         status = decode_putfh(xdr);
6951         if (status)
6952                 goto out;
6953         status = decode_getfh(xdr, res->fh);
6954         if (status)
6955                 goto out;
6956         if (res->renew)
6957                 status = decode_renew(xdr);
6958 out:
6959         return status;
6960 }
6961
6962 #if defined(CONFIG_NFS_V4_1)
6963 /*
6964  * Decode BIND_CONN_TO_SESSION response
6965  */
6966 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6967                                         struct xdr_stream *xdr,
6968                                         void *res)
6969 {
6970         struct compound_hdr hdr;
6971         int status;
6972
6973         status = decode_compound_hdr(xdr, &hdr);
6974         if (!status)
6975                 status = decode_bind_conn_to_session(xdr, res);
6976         return status;
6977 }
6978
6979 /*
6980  * Decode EXCHANGE_ID response
6981  */
6982 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6983                                     struct xdr_stream *xdr,
6984                                     void *res)
6985 {
6986         struct compound_hdr hdr;
6987         int status;
6988
6989         status = decode_compound_hdr(xdr, &hdr);
6990         if (!status)
6991                 status = decode_exchange_id(xdr, res);
6992         return status;
6993 }
6994
6995 /*
6996  * Decode CREATE_SESSION response
6997  */
6998 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6999                                        struct xdr_stream *xdr,
7000                                        struct nfs41_create_session_res *res)
7001 {
7002         struct compound_hdr hdr;
7003         int status;
7004
7005         status = decode_compound_hdr(xdr, &hdr);
7006         if (!status)
7007                 status = decode_create_session(xdr, res);
7008         return status;
7009 }
7010
7011 /*
7012  * Decode DESTROY_SESSION response
7013  */
7014 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7015                                         struct xdr_stream *xdr,
7016                                         void *res)
7017 {
7018         struct compound_hdr hdr;
7019         int status;
7020
7021         status = decode_compound_hdr(xdr, &hdr);
7022         if (!status)
7023                 status = decode_destroy_session(xdr, res);
7024         return status;
7025 }
7026
7027 /*
7028  * Decode DESTROY_CLIENTID response
7029  */
7030 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7031                                         struct xdr_stream *xdr,
7032                                         void *res)
7033 {
7034         struct compound_hdr hdr;
7035         int status;
7036
7037         status = decode_compound_hdr(xdr, &hdr);
7038         if (!status)
7039                 status = decode_destroy_clientid(xdr, res);
7040         return status;
7041 }
7042
7043 /*
7044  * Decode SEQUENCE response
7045  */
7046 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7047                                  struct xdr_stream *xdr,
7048                                  struct nfs4_sequence_res *res)
7049 {
7050         struct compound_hdr hdr;
7051         int status;
7052
7053         status = decode_compound_hdr(xdr, &hdr);
7054         if (!status)
7055                 status = decode_sequence(xdr, res, rqstp);
7056         return status;
7057 }
7058
7059 /*
7060  * Decode GET_LEASE_TIME response
7061  */
7062 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7063                                        struct xdr_stream *xdr,
7064                                        struct nfs4_get_lease_time_res *res)
7065 {
7066         struct compound_hdr hdr;
7067         int status;
7068
7069         status = decode_compound_hdr(xdr, &hdr);
7070         if (!status)
7071                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7072         if (!status)
7073                 status = decode_putrootfh(xdr);
7074         if (!status)
7075                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7076         return status;
7077 }
7078
7079 /*
7080  * Decode RECLAIM_COMPLETE response
7081  */
7082 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7083                                          struct xdr_stream *xdr,
7084                                          struct nfs41_reclaim_complete_res *res)
7085 {
7086         struct compound_hdr hdr;
7087         int status;
7088
7089         status = decode_compound_hdr(xdr, &hdr);
7090         if (!status)
7091                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7092         if (!status)
7093                 status = decode_reclaim_complete(xdr, (void *)NULL);
7094         return status;
7095 }
7096
7097 /*
7098  * Decode GETDEVICELIST response
7099  */
7100 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7101                                       struct xdr_stream *xdr,
7102                                       struct nfs4_getdevicelist_res *res)
7103 {
7104         struct compound_hdr hdr;
7105         int status;
7106
7107         dprintk("encoding getdevicelist!\n");
7108
7109         status = decode_compound_hdr(xdr, &hdr);
7110         if (status != 0)
7111                 goto out;
7112         status = decode_sequence(xdr, &res->seq_res, rqstp);
7113         if (status != 0)
7114                 goto out;
7115         status = decode_putfh(xdr);
7116         if (status != 0)
7117                 goto out;
7118         status = decode_getdevicelist(xdr, res->devlist);
7119 out:
7120         return status;
7121 }
7122
7123 /*
7124  * Decode GETDEVINFO response
7125  */
7126 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7127                                       struct xdr_stream *xdr,
7128                                       struct nfs4_getdeviceinfo_res *res)
7129 {
7130         struct compound_hdr hdr;
7131         int status;
7132
7133         status = decode_compound_hdr(xdr, &hdr);
7134         if (status != 0)
7135                 goto out;
7136         status = decode_sequence(xdr, &res->seq_res, rqstp);
7137         if (status != 0)
7138                 goto out;
7139         status = decode_getdeviceinfo(xdr, res->pdev);
7140 out:
7141         return status;
7142 }
7143
7144 /*
7145  * Decode LAYOUTGET response
7146  */
7147 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7148                                   struct xdr_stream *xdr,
7149                                   struct nfs4_layoutget_res *res)
7150 {
7151         struct compound_hdr hdr;
7152         int status;
7153
7154         status = decode_compound_hdr(xdr, &hdr);
7155         if (status)
7156                 goto out;
7157         status = decode_sequence(xdr, &res->seq_res, rqstp);
7158         if (status)
7159                 goto out;
7160         status = decode_putfh(xdr);
7161         if (status)
7162                 goto out;
7163         status = decode_layoutget(xdr, rqstp, res);
7164 out:
7165         return status;
7166 }
7167
7168 /*
7169  * Decode LAYOUTRETURN response
7170  */
7171 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7172                                      struct xdr_stream *xdr,
7173                                      struct nfs4_layoutreturn_res *res)
7174 {
7175         struct compound_hdr hdr;
7176         int status;
7177
7178         status = decode_compound_hdr(xdr, &hdr);
7179         if (status)
7180                 goto out;
7181         status = decode_sequence(xdr, &res->seq_res, rqstp);
7182         if (status)
7183                 goto out;
7184         status = decode_putfh(xdr);
7185         if (status)
7186                 goto out;
7187         status = decode_layoutreturn(xdr, res);
7188 out:
7189         return status;
7190 }
7191
7192 /*
7193  * Decode LAYOUTCOMMIT response
7194  */
7195 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7196                                      struct xdr_stream *xdr,
7197                                      struct nfs4_layoutcommit_res *res)
7198 {
7199         struct compound_hdr hdr;
7200         int status;
7201
7202         status = decode_compound_hdr(xdr, &hdr);
7203         if (status)
7204                 goto out;
7205         status = decode_sequence(xdr, &res->seq_res, rqstp);
7206         if (status)
7207                 goto out;
7208         status = decode_putfh(xdr);
7209         if (status)
7210                 goto out;
7211         status = decode_layoutcommit(xdr, rqstp, res);
7212         if (status)
7213                 goto out;
7214         decode_getfattr(xdr, res->fattr, res->server);
7215 out:
7216         return status;
7217 }
7218
7219 /*
7220  * Decode SECINFO_NO_NAME response
7221  */
7222 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7223                                         struct xdr_stream *xdr,
7224                                         struct nfs4_secinfo_res *res)
7225 {
7226         struct compound_hdr hdr;
7227         int status;
7228
7229         status = decode_compound_hdr(xdr, &hdr);
7230         if (status)
7231                 goto out;
7232         status = decode_sequence(xdr, &res->seq_res, rqstp);
7233         if (status)
7234                 goto out;
7235         status = decode_putrootfh(xdr);
7236         if (status)
7237                 goto out;
7238         status = decode_secinfo_no_name(xdr, res);
7239 out:
7240         return status;
7241 }
7242
7243 /*
7244  * Decode TEST_STATEID response
7245  */
7246 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7247                                      struct xdr_stream *xdr,
7248                                      struct nfs41_test_stateid_res *res)
7249 {
7250         struct compound_hdr hdr;
7251         int status;
7252
7253         status = decode_compound_hdr(xdr, &hdr);
7254         if (status)
7255                 goto out;
7256         status = decode_sequence(xdr, &res->seq_res, rqstp);
7257         if (status)
7258                 goto out;
7259         status = decode_test_stateid(xdr, res);
7260 out:
7261         return status;
7262 }
7263
7264 /*
7265  * Decode FREE_STATEID response
7266  */
7267 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7268                                      struct xdr_stream *xdr,
7269                                      struct nfs41_free_stateid_res *res)
7270 {
7271         struct compound_hdr hdr;
7272         int status;
7273
7274         status = decode_compound_hdr(xdr, &hdr);
7275         if (status)
7276                 goto out;
7277         status = decode_sequence(xdr, &res->seq_res, rqstp);
7278         if (status)
7279                 goto out;
7280         status = decode_free_stateid(xdr, res);
7281 out:
7282         return status;
7283 }
7284 #endif /* CONFIG_NFS_V4_1 */
7285
7286 /**
7287  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7288  *                      the local page cache.
7289  * @xdr: XDR stream where entry resides
7290  * @entry: buffer to fill in with entry data
7291  * @plus: boolean indicating whether this should be a readdirplus entry
7292  *
7293  * Returns zero if successful, otherwise a negative errno value is
7294  * returned.
7295  *
7296  * This function is not invoked during READDIR reply decoding, but
7297  * rather whenever an application invokes the getdents(2) system call
7298  * on a directory already in our cache.
7299  */
7300 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7301                        int plus)
7302 {
7303         unsigned int savep;
7304         uint32_t bitmap[3] = {0};
7305         uint32_t len;
7306         __be32 *p = xdr_inline_decode(xdr, 4);
7307         if (unlikely(!p))
7308                 goto out_overflow;
7309         if (*p == xdr_zero) {
7310                 p = xdr_inline_decode(xdr, 4);
7311                 if (unlikely(!p))
7312                         goto out_overflow;
7313                 if (*p == xdr_zero)
7314                         return -EAGAIN;
7315                 entry->eof = 1;
7316                 return -EBADCOOKIE;
7317         }
7318
7319         p = xdr_inline_decode(xdr, 12);
7320         if (unlikely(!p))
7321                 goto out_overflow;
7322         entry->prev_cookie = entry->cookie;
7323         p = xdr_decode_hyper(p, &entry->cookie);
7324         entry->len = be32_to_cpup(p);
7325
7326         p = xdr_inline_decode(xdr, entry->len);
7327         if (unlikely(!p))
7328                 goto out_overflow;
7329         entry->name = (const char *) p;
7330
7331         /*
7332          * In case the server doesn't return an inode number,
7333          * we fake one here.  (We don't use inode number 0,
7334          * since glibc seems to choke on it...)
7335          */
7336         entry->ino = 1;
7337         entry->fattr->valid = 0;
7338
7339         if (decode_attr_bitmap(xdr, bitmap) < 0)
7340                 goto out_overflow;
7341
7342         if (decode_attr_length(xdr, &len, &savep) < 0)
7343                 goto out_overflow;
7344
7345         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7346                         NULL, entry->label, entry->server) < 0)
7347                 goto out_overflow;
7348         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7349                 entry->ino = entry->fattr->mounted_on_fileid;
7350         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7351                 entry->ino = entry->fattr->fileid;
7352
7353         entry->d_type = DT_UNKNOWN;
7354         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7355                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7356
7357         return 0;
7358
7359 out_overflow:
7360         print_overflow_msg(__func__, xdr);
7361         return -EAGAIN;
7362 }
7363
7364 /*
7365  * We need to translate between nfs status return values and
7366  * the local errno values which may not be the same.
7367  */
7368 static struct {
7369         int stat;
7370         int errno;
7371 } nfs_errtbl[] = {
7372         { NFS4_OK,              0               },
7373         { NFS4ERR_PERM,         -EPERM          },
7374         { NFS4ERR_NOENT,        -ENOENT         },
7375         { NFS4ERR_IO,           -errno_NFSERR_IO},
7376         { NFS4ERR_NXIO,         -ENXIO          },
7377         { NFS4ERR_ACCESS,       -EACCES         },
7378         { NFS4ERR_EXIST,        -EEXIST         },
7379         { NFS4ERR_XDEV,         -EXDEV          },
7380         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7381         { NFS4ERR_ISDIR,        -EISDIR         },
7382         { NFS4ERR_INVAL,        -EINVAL         },
7383         { NFS4ERR_FBIG,         -EFBIG          },
7384         { NFS4ERR_NOSPC,        -ENOSPC         },
7385         { NFS4ERR_ROFS,         -EROFS          },
7386         { NFS4ERR_MLINK,        -EMLINK         },
7387         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7388         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7389         { NFS4ERR_DQUOT,        -EDQUOT         },
7390         { NFS4ERR_STALE,        -ESTALE         },
7391         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7392         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7393         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7394         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7395         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7396         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7397         { NFS4ERR_LOCKED,       -EAGAIN         },
7398         { NFS4ERR_SYMLINK,      -ELOOP          },
7399         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7400         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7401         { -1,                   -EIO            }
7402 };
7403
7404 /*
7405  * Convert an NFS error code to a local one.
7406  * This one is used jointly by NFSv2 and NFSv3.
7407  */
7408 static int
7409 nfs4_stat_to_errno(int stat)
7410 {
7411         int i;
7412         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7413                 if (nfs_errtbl[i].stat == stat)
7414                         return nfs_errtbl[i].errno;
7415         }
7416         if (stat <= 10000 || stat > 10100) {
7417                 /* The server is looney tunes. */
7418                 return -EREMOTEIO;
7419         }
7420         /* If we cannot translate the error, the recovery routines should
7421          * handle it.
7422          * Note: remaining NFSv4 error codes have values > 10000, so should
7423          * not conflict with native Linux error codes.
7424          */
7425         return -stat;
7426 }
7427
7428 #define PROC(proc, argtype, restype)                            \
7429 [NFSPROC4_CLNT_##proc] = {                                      \
7430         .p_proc   = NFSPROC4_COMPOUND,                          \
7431         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7432         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7433         .p_arglen = NFS4_##argtype##_sz,                        \
7434         .p_replen = NFS4_##restype##_sz,                        \
7435         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7436         .p_name   = #proc,                                      \
7437 }
7438
7439 struct rpc_procinfo     nfs4_procedures[] = {
7440         PROC(READ,              enc_read,               dec_read),
7441         PROC(WRITE,             enc_write,              dec_write),
7442         PROC(COMMIT,            enc_commit,             dec_commit),
7443         PROC(OPEN,              enc_open,               dec_open),
7444         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7445         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7446         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7447         PROC(CLOSE,             enc_close,              dec_close),
7448         PROC(SETATTR,           enc_setattr,            dec_setattr),
7449         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7450         PROC(RENEW,             enc_renew,              dec_renew),
7451         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7452         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7453         PROC(LOCK,              enc_lock,               dec_lock),
7454         PROC(LOCKT,             enc_lockt,              dec_lockt),
7455         PROC(LOCKU,             enc_locku,              dec_locku),
7456         PROC(ACCESS,            enc_access,             dec_access),
7457         PROC(GETATTR,           enc_getattr,            dec_getattr),
7458         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7459         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7460         PROC(REMOVE,            enc_remove,             dec_remove),
7461         PROC(RENAME,            enc_rename,             dec_rename),
7462         PROC(LINK,              enc_link,               dec_link),
7463         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7464         PROC(CREATE,            enc_create,             dec_create),
7465         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7466         PROC(STATFS,            enc_statfs,             dec_statfs),
7467         PROC(READLINK,          enc_readlink,           dec_readlink),
7468         PROC(READDIR,           enc_readdir,            dec_readdir),
7469         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7470         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7471         PROC(GETACL,            enc_getacl,             dec_getacl),
7472         PROC(SETACL,            enc_setacl,             dec_setacl),
7473         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7474         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7475         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7476         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7477 #if defined(CONFIG_NFS_V4_1)
7478         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7479         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7480         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7481         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7482         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7483         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7484         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7485         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7486         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7487         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7488         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7489         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7490         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7491         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7492         PROC(BIND_CONN_TO_SESSION,
7493                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7494         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7495 #endif /* CONFIG_NFS_V4_1 */
7496 };
7497
7498 const struct rpc_version nfs_version4 = {
7499         .number                 = 4,
7500         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7501         .procs                  = nfs4_procedures
7502 };
7503
7504 /*
7505  * Local variables:
7506  *  c-basic-offset: 8
7507  * End:
7508  */