fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #else
 109 #define nfs4_label_maxsz        0
 110 #endif
 111 /* We support only one layout type per file system */
 112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113 /* This is based on getfattr, which uses the most attributes: */
 114 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                  decode_mdsthreshold_maxsz))
 118 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                 nfs4_fattr_value_maxsz)
 120 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                  1 + 2 + 1 + \
 123                                 nfs4_owner_maxsz + \
 124                                 nfs4_group_maxsz + \
 125                                 nfs4_label_maxsz + \
 126                                 4 + 4)
 127 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 133  * layout types will be returned.
 134  */
 135 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139 #define encode_setclientid_maxsz \
 140                                 (op_encode_hdr_maxsz + \
 141                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 143                                 1 /* sc_prog */ + \
 144                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                 1) /* sc_cb_ident */
 147 #define decode_setclientid_maxsz \
 148                                 (op_decode_hdr_maxsz + \
 149                                 2 + \
 150                                 1024) /* large value for CLID_INUSE */
 151 #define encode_setclientid_confirm_maxsz \
 152                                 (op_encode_hdr_maxsz + \
 153                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 154 #define decode_setclientid_confirm_maxsz \
 155                                 (op_decode_hdr_maxsz)
 156 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 157 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 158 #define encode_share_access_maxsz \
 159                                 (2)
 160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 161 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 163 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 164                                 2 + encode_share_access_maxsz + 2 + \
 165                                 open_owner_id_maxsz + \
 166                                 encode_opentype_maxsz + \
 167                                 encode_claim_null_maxsz)
 168 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 170                                 decode_ace_maxsz)
 171 #define decode_change_info_maxsz        (5)
 172 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 173                                 decode_stateid_maxsz + \
 174                                 decode_change_info_maxsz + 1 + \
 175                                 nfs4_fattr_bitmap_maxsz + \
 176                                 decode_delegation_maxsz)
 177 #define encode_open_confirm_maxsz \
 178                                 (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 1)
 180 #define decode_open_confirm_maxsz \
 181                                 (op_decode_hdr_maxsz + \
 182                                  decode_stateid_maxsz)
 183 #define encode_open_downgrade_maxsz \
 184                                 (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 1 + \
 186                                  encode_share_access_maxsz)
 187 #define decode_open_downgrade_maxsz \
 188                                 (op_decode_hdr_maxsz + \
 189                                  decode_stateid_maxsz)
 190 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 191                                  1 + encode_stateid_maxsz)
 192 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + \
 196                                  encode_attrs_maxsz)
 197 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 198                                  nfs4_fattr_bitmap_maxsz)
 199 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 200                                  encode_stateid_maxsz + 3)
 201 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 202 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 203                                  2 + encode_verifier_maxsz + 5 + \
 204                                 nfs4_label_maxsz)
 205 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 206                                  decode_verifier_maxsz)
 207 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 208 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 209 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 210                                  encode_stateid_maxsz + 4)
 211 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 212                                  2 + decode_verifier_maxsz)
 213 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 214 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 215                                  decode_verifier_maxsz)
 216 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 217                                 nfs4_name_maxsz)
 218 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_change_info_maxsz)
 220 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 221                                 2 * nfs4_name_maxsz)
 222 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 226                                 nfs4_name_maxsz)
 227 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 228 #define encode_lockowner_maxsz  (7)
 229 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 230                                  7 + \
 231                                  1 + encode_stateid_maxsz + 1 + \
 232                                  encode_lockowner_maxsz)
 233 #define decode_lock_denied_maxsz \
 234                                 (8 + decode_lockowner_maxsz)
 235 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 236                                  decode_lock_denied_maxsz)
 237 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 238                                 encode_lockowner_maxsz)
 239 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 242                                  encode_stateid_maxsz + \
 243                                  4)
 244 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_stateid_maxsz)
 246 #define encode_release_lockowner_maxsz \
 247                                 (op_encode_hdr_maxsz + \
 248                                  encode_lockowner_maxsz)
 249 #define decode_release_lockowner_maxsz \
 250                                 (op_decode_hdr_maxsz)
 251 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 252 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 253 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 254                                 1 + nfs4_name_maxsz + \
 255                                 1 + \
 256                                 nfs4_fattr_maxsz)
 257 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 258 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 259                                 1 + 2 + nfs4_name_maxsz + \
 260                                 encode_attrs_maxsz)
 261 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 262                                 decode_change_info_maxsz + \
 263                                 nfs4_fattr_bitmap_maxsz)
 264 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 265 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 266 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 267 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 268 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 269 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 270                                  nfs4_fattr_bitmap_maxsz + 1)
 271 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 272                                  encode_stateid_maxsz + 3)
 273 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 274 #define encode_fs_locations_maxsz \
 275                                 (encode_getattr_maxsz)
 276 #define decode_fs_locations_maxsz \
 277                                 (0)
 278 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 279 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 280
 281 #if defined(CONFIG_NFS_V4_1)
 282 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 283 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 284                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 285
 286 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 287                                 encode_verifier_maxsz + \
 288                                 1 /* co_ownerid.len */ + \
 289                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 290                                 1 /* flags */ + \
 291                                 1 /* spa_how */ + \
 292                                 /* max is SP4_MACH_CRED (for now) */ + \
 293                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 294                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 295                                 1 /* implementation id array of size 1 */ + \
 296                                 1 /* nii_domain */ + \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 298                                 1 /* nii_name */ + \
 299                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 300                                 3 /* nii_date */)
 301 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 302                                 2 /* eir_clientid */ + \
 303                                 1 /* eir_sequenceid */ + \
 304                                 1 /* eir_flags */ + \
 305                                 1 /* spr_how */ + \
 306                                   /* max is SP4_MACH_CRED (for now) */ + \
 307                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 308                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 309                                 2 /* eir_server_owner.so_minor_id */ + \
 310                                 /* eir_server_owner.so_major_id<> */ \
 311                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 312                                 /* eir_server_scope<> */ \
 313                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                 1 /* eir_server_impl_id array length */ + \
 315                                 1 /* nii_domain */ + \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 317                                 1 /* nii_name */ + \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 3 /* nii_date */)
 320 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 321 #define decode_channel_attrs_maxsz  (6 + \
 322                                      1 /* ca_rdma_ird.len */ + \
 323                                      1 /* ca_rdma_ird */)
 324 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 325                                      2 /* csa_clientid */ + \
 326                                      1 /* csa_sequence */ + \
 327                                      1 /* csa_flags */ + \
 328                                      encode_channel_attrs_maxsz + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      1 /* csa_cb_program */ + \
 331                                      1 /* csa_sec_parms.len (1) */ + \
 332                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 333                                      1 /* stamp */ + \
 334                                      1 /* machinename.len */ + \
 335                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 336                                      1 /* uid */ + \
 337                                      1 /* gid */ + \
 338                                      1 /* gids.len (0) */)
 339 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 340                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 341                                      1 /* csr_sequence */ + \
 342                                      1 /* csr_flags */ + \
 343                                      decode_channel_attrs_maxsz + \
 344                                      decode_channel_attrs_maxsz)
 345 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 346                                      /* bctsa_sessid */ \
 347                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 348                                      1 /* bctsa_dir */ + \
 349                                      1 /* bctsa_use_conn_in_rdma_mode */)
 350 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 351                                      /* bctsr_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsr_dir */ + \
 354                                      1 /* bctsr_use_conn_in_rdma_mode */)
 355 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 356 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 357 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 358 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 359 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 360                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 361 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 362                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 363 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 364 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 365 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 366                                 encode_verifier_maxsz)
 367 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 368                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 369                                 decode_verifier_maxsz \
 370                                   /* verifier4 gdlr_verifier */ + \
 371                                 1 /* gdlr_deviceid_list count */ + \
 372                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 373                                             NFS4_DEVICEID4_SIZE) \
 374                                   /* gdlr_deviceid_list */ + \
 375                                 1 /* bool gdlr_eof */)
 376 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 377                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 378 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 379                                 1 /* layout type */ + \
 380                                 1 /* opaque devaddr4 length */ + \
 381                                   /* devaddr4 payload is read into page */ \
 382                                 1 /* notification bitmap length */ + \
 383                                 1 /* notification bitmap */)
 384 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 385                                 encode_stateid_maxsz)
 386 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 387                                 decode_stateid_maxsz + \
 388                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 389 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 390                                 2 /* offset */ + \
 391                                 2 /* length */ + \
 392                                 1 /* reclaim */ + \
 393                                 encode_stateid_maxsz + \
 394                                 1 /* new offset (true) */ + \
 395                                 2 /* last byte written */ + \
 396                                 1 /* nt_timechanged (false) */ + \
 397                                 1 /* layoutupdate4 layout type */ + \
 398                                 1 /* layoutupdate4 opaqueue len */)
 399                                   /* the actual content of layoutupdate4 should
 400                                      be allocated by drivers and spliced in
 401                                      using xdr_write_pages */
 402 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 403 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 404                                 encode_stateid_maxsz + \
 405                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 407                                 1 + decode_stateid_maxsz)
 408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 410 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 412 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 413 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 414                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 415 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 416 #else /* CONFIG_NFS_V4_1 */
 417 #define encode_sequence_maxsz   0
 418 #define decode_sequence_maxsz   0
 419 #endif /* CONFIG_NFS_V4_1 */
 420
 421 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 422 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 423 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 424                                 encode_sequence_maxsz + \
 425                                 encode_putfh_maxsz + \
 426                                 encode_read_maxsz)
 427 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 428                                 decode_sequence_maxsz + \
 429                                 decode_putfh_maxsz + \
 430                                 decode_read_maxsz)
 431 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 432                                 encode_sequence_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_readlink_maxsz)
 435 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 436                                 decode_sequence_maxsz + \
 437                                 decode_putfh_maxsz + \
 438                                 decode_readlink_maxsz)
 439 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 440                                 encode_sequence_maxsz + \
 441                                 encode_putfh_maxsz + \
 442                                 encode_readdir_maxsz)
 443 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 444                                 decode_sequence_maxsz + \
 445                                 decode_putfh_maxsz + \
 446                                 decode_readdir_maxsz)
 447 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 448                                 encode_sequence_maxsz + \
 449                                 encode_putfh_maxsz + \
 450                                 encode_write_maxsz + \
 451                                 encode_getattr_maxsz)
 452 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_write_maxsz + \
 456                                 decode_getattr_maxsz)
 457 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 458                                 encode_sequence_maxsz + \
 459                                 encode_putfh_maxsz + \
 460                                 encode_commit_maxsz)
 461 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 462                                 decode_sequence_maxsz + \
 463                                 decode_putfh_maxsz + \
 464                                 decode_commit_maxsz)
 465 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_open_maxsz + \
 469                                 encode_access_maxsz + \
 470                                 encode_getfh_maxsz + \
 471                                 encode_getattr_maxsz)
 472 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 473                                 decode_sequence_maxsz + \
 474                                 decode_putfh_maxsz + \
 475                                 decode_open_maxsz + \
 476                                 decode_access_maxsz + \
 477                                 decode_getfh_maxsz + \
 478                                 decode_getattr_maxsz)
 479 #define NFS4_enc_open_confirm_sz \
 480                                 (compound_encode_hdr_maxsz + \
 481                                  encode_putfh_maxsz + \
 482                                  encode_open_confirm_maxsz)
 483 #define NFS4_dec_open_confirm_sz \
 484                                 (compound_decode_hdr_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_open_confirm_maxsz)
 487 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 488                                         encode_sequence_maxsz + \
 489                                         encode_putfh_maxsz + \
 490                                         encode_open_maxsz + \
 491                                         encode_access_maxsz + \
 492                                         encode_getattr_maxsz)
 493 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 494                                         decode_sequence_maxsz + \
 495                                         decode_putfh_maxsz + \
 496                                         decode_open_maxsz + \
 497                                         decode_access_maxsz + \
 498                                         decode_getattr_maxsz)
 499 #define NFS4_enc_open_downgrade_sz \
 500                                 (compound_encode_hdr_maxsz + \
 501                                  encode_sequence_maxsz + \
 502                                  encode_putfh_maxsz + \
 503                                  encode_open_downgrade_maxsz + \
 504                                  encode_getattr_maxsz)
 505 #define NFS4_dec_open_downgrade_sz \
 506                                 (compound_decode_hdr_maxsz + \
 507                                  decode_sequence_maxsz + \
 508                                  decode_putfh_maxsz + \
 509                                  decode_open_downgrade_maxsz + \
 510                                  decode_getattr_maxsz)
 511 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 512                                  encode_sequence_maxsz + \
 513                                  encode_putfh_maxsz + \
 514                                  encode_close_maxsz + \
 515                                  encode_getattr_maxsz)
 516 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 517                                  decode_sequence_maxsz + \
 518                                  decode_putfh_maxsz + \
 519                                  decode_close_maxsz + \
 520                                  decode_getattr_maxsz)
 521 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 522                                  encode_sequence_maxsz + \
 523                                  encode_putfh_maxsz + \
 524                                  encode_setattr_maxsz + \
 525                                  encode_getattr_maxsz)
 526 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 527                                  decode_sequence_maxsz + \
 528                                  decode_putfh_maxsz + \
 529                                  decode_setattr_maxsz + \
 530                                  decode_getattr_maxsz)
 531 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 532                                 encode_sequence_maxsz + \
 533                                 encode_putfh_maxsz + \
 534                                 encode_fsinfo_maxsz)
 535 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 536                                 decode_sequence_maxsz + \
 537                                 decode_putfh_maxsz + \
 538                                 decode_fsinfo_maxsz)
 539 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 540                                 encode_renew_maxsz)
 541 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 542                                 decode_renew_maxsz)
 543 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 544                                 encode_setclientid_maxsz)
 545 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 546                                 decode_setclientid_maxsz)
 547 #define NFS4_enc_setclientid_confirm_sz \
 548                                 (compound_encode_hdr_maxsz + \
 549                                 encode_setclientid_confirm_maxsz)
 550 #define NFS4_dec_setclientid_confirm_sz \
 551                                 (compound_decode_hdr_maxsz + \
 552                                 decode_setclientid_confirm_maxsz)
 553 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 554                                 encode_sequence_maxsz + \
 555                                 encode_putfh_maxsz + \
 556                                 encode_lock_maxsz)
 557 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 558                                 decode_sequence_maxsz + \
 559                                 decode_putfh_maxsz + \
 560                                 decode_lock_maxsz)
 561 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 562                                 encode_sequence_maxsz + \
 563                                 encode_putfh_maxsz + \
 564                                 encode_lockt_maxsz)
 565 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 566                                  decode_sequence_maxsz + \
 567                                  decode_putfh_maxsz + \
 568                                  decode_lockt_maxsz)
 569 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 570                                 encode_sequence_maxsz + \
 571                                 encode_putfh_maxsz + \
 572                                 encode_locku_maxsz)
 573 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 574                                 decode_sequence_maxsz + \
 575                                 decode_putfh_maxsz + \
 576                                 decode_locku_maxsz)
 577 #define NFS4_enc_release_lockowner_sz \
 578                                 (compound_encode_hdr_maxsz + \
 579                                  encode_lockowner_maxsz)
 580 #define NFS4_dec_release_lockowner_sz \
 581                                 (compound_decode_hdr_maxsz + \
 582                                  decode_lockowner_maxsz)
 583 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 584                                 encode_sequence_maxsz + \
 585                                 encode_putfh_maxsz + \
 586                                 encode_access_maxsz + \
 587                                 encode_getattr_maxsz)
 588 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 589                                 decode_sequence_maxsz + \
 590                                 decode_putfh_maxsz + \
 591                                 decode_access_maxsz + \
 592                                 decode_getattr_maxsz)
 593 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 594                                 encode_sequence_maxsz + \
 595                                 encode_putfh_maxsz + \
 596                                 encode_getattr_maxsz + \
 597                                 encode_renew_maxsz)
 598 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 599                                 decode_sequence_maxsz + \
 600                                 decode_putfh_maxsz + \
 601                                 decode_getattr_maxsz + \
 602                                 decode_renew_maxsz)
 603 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 604                                 encode_sequence_maxsz + \
 605                                 encode_putfh_maxsz + \
 606                                 encode_lookup_maxsz + \
 607                                 encode_getattr_maxsz + \
 608                                 encode_getfh_maxsz)
 609 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_lookup_maxsz + \
 613                                 decode_getattr_maxsz + \
 614                                 decode_getfh_maxsz)
 615 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putrootfh_maxsz + \
 618                                 encode_getattr_maxsz + \
 619                                 encode_getfh_maxsz)
 620 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 621                                 decode_sequence_maxsz + \
 622                                 decode_putrootfh_maxsz + \
 623                                 decode_getattr_maxsz + \
 624                                 decode_getfh_maxsz)
 625 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 626                                 encode_sequence_maxsz + \
 627                                 encode_putfh_maxsz + \
 628                                 encode_remove_maxsz)
 629 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 630                                 decode_sequence_maxsz + \
 631                                 decode_putfh_maxsz + \
 632                                 decode_remove_maxsz)
 633 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 634                                 encode_sequence_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_savefh_maxsz + \
 637                                 encode_putfh_maxsz + \
 638                                 encode_rename_maxsz)
 639 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 640                                 decode_sequence_maxsz + \
 641                                 decode_putfh_maxsz + \
 642                                 decode_savefh_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_rename_maxsz)
 645 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_savefh_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_link_maxsz + \
 651                                 encode_restorefh_maxsz + \
 652                                 encode_getattr_maxsz)
 653 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_savefh_maxsz + \
 657                                 decode_putfh_maxsz + \
 658                                 decode_link_maxsz + \
 659                                 decode_restorefh_maxsz + \
 660                                 decode_getattr_maxsz)
 661 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_symlink_maxsz + \
 665                                 encode_getattr_maxsz + \
 666                                 encode_getfh_maxsz)
 667 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 668                                 decode_sequence_maxsz + \
 669                                 decode_putfh_maxsz + \
 670                                 decode_symlink_maxsz + \
 671                                 decode_getattr_maxsz + \
 672                                 decode_getfh_maxsz)
 673 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 674                                 encode_sequence_maxsz + \
 675                                 encode_putfh_maxsz + \
 676                                 encode_create_maxsz + \
 677                                 encode_getfh_maxsz + \
 678                                 encode_getattr_maxsz)
 679 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 680                                 decode_sequence_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_create_maxsz + \
 683                                 decode_getfh_maxsz + \
 684                                 decode_getattr_maxsz)
 685 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 686                                 encode_sequence_maxsz + \
 687                                 encode_putfh_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_getattr_maxsz)
 693 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_statfs_maxsz)
 697 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_putfh_maxsz + \
 700                                 decode_statfs_maxsz)
 701 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_getattr_maxsz)
 705 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_getattr_maxsz)
 709 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_delegreturn_maxsz + \
 713                                 encode_getattr_maxsz)
 714 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 715                                 decode_sequence_maxsz + \
 716                                 decode_delegreturn_maxsz + \
 717                                 decode_getattr_maxsz)
 718 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 719                                 encode_sequence_maxsz + \
 720                                 encode_putfh_maxsz + \
 721                                 encode_getacl_maxsz)
 722 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 723                                 decode_sequence_maxsz + \
 724                                 decode_putfh_maxsz + \
 725                                 decode_getacl_maxsz)
 726 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 727                                 encode_sequence_maxsz + \
 728                                 encode_putfh_maxsz + \
 729                                 encode_setacl_maxsz)
 730 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 731                                 decode_sequence_maxsz + \
 732                                 decode_putfh_maxsz + \
 733                                 decode_setacl_maxsz)
 734 #define NFS4_enc_fs_locations_sz \
 735                                 (compound_encode_hdr_maxsz + \
 736                                  encode_sequence_maxsz + \
 737                                  encode_putfh_maxsz + \
 738                                  encode_lookup_maxsz + \
 739                                  encode_fs_locations_maxsz + \
 740                                  encode_renew_maxsz)
 741 #define NFS4_dec_fs_locations_sz \
 742                                 (compound_decode_hdr_maxsz + \
 743                                  decode_sequence_maxsz + \
 744                                  decode_putfh_maxsz + \
 745                                  decode_lookup_maxsz + \
 746                                  decode_fs_locations_maxsz + \
 747                                  decode_renew_maxsz)
 748 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 749                                 encode_sequence_maxsz + \
 750                                 encode_putfh_maxsz + \
 751                                 encode_secinfo_maxsz)
 752 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 753                                 decode_sequence_maxsz + \
 754                                 decode_putfh_maxsz + \
 755                                 decode_secinfo_maxsz)
 756 #define NFS4_enc_fsid_present_sz \
 757                                 (compound_encode_hdr_maxsz + \
 758                                  encode_sequence_maxsz + \
 759                                  encode_putfh_maxsz + \
 760                                  encode_getfh_maxsz + \
 761                                  encode_renew_maxsz)
 762 #define NFS4_dec_fsid_present_sz \
 763                                 (compound_decode_hdr_maxsz + \
 764                                  decode_sequence_maxsz + \
 765                                  decode_putfh_maxsz + \
 766                                  decode_getfh_maxsz + \
 767                                  decode_renew_maxsz)
 768 #if defined(CONFIG_NFS_V4_1)
 769 #define NFS4_enc_bind_conn_to_session_sz \
 770                                 (compound_encode_hdr_maxsz + \
 771                                  encode_bind_conn_to_session_maxsz)
 772 #define NFS4_dec_bind_conn_to_session_sz \
 773                                 (compound_decode_hdr_maxsz + \
 774                                  decode_bind_conn_to_session_maxsz)
 775 #define NFS4_enc_exchange_id_sz \
 776                                 (compound_encode_hdr_maxsz + \
 777                                  encode_exchange_id_maxsz)
 778 #define NFS4_dec_exchange_id_sz \
 779                                 (compound_decode_hdr_maxsz + \
 780                                  decode_exchange_id_maxsz)
 781 #define NFS4_enc_create_session_sz \
 782                                 (compound_encode_hdr_maxsz + \
 783                                  encode_create_session_maxsz)
 784 #define NFS4_dec_create_session_sz \
 785                                 (compound_decode_hdr_maxsz + \
 786                                  decode_create_session_maxsz)
 787 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 788                                          encode_destroy_session_maxsz)
 789 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 790                                          decode_destroy_session_maxsz)
 791 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 792                                          encode_destroy_clientid_maxsz)
 793 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 794                                          decode_destroy_clientid_maxsz)
 795 #define NFS4_enc_sequence_sz \
 796                                 (compound_decode_hdr_maxsz + \
 797                                  encode_sequence_maxsz)
 798 #define NFS4_dec_sequence_sz \
 799                                 (compound_decode_hdr_maxsz + \
 800                                  decode_sequence_maxsz)
 801 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 802                                          encode_sequence_maxsz + \
 803                                          encode_putrootfh_maxsz + \
 804                                          encode_fsinfo_maxsz)
 805 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 806                                          decode_sequence_maxsz + \
 807                                          decode_putrootfh_maxsz + \
 808                                          decode_fsinfo_maxsz)
 809 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 810                                          encode_sequence_maxsz + \
 811                                          encode_reclaim_complete_maxsz)
 812 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 813                                          decode_sequence_maxsz + \
 814                                          decode_reclaim_complete_maxsz)
 815 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 816                                 encode_sequence_maxsz + \
 817                                 encode_putfh_maxsz + \
 818                                 encode_getdevicelist_maxsz)
 819 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 820                                 decode_sequence_maxsz + \
 821                                 decode_putfh_maxsz + \
 822                                 decode_getdevicelist_maxsz)
 823 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 824                                 encode_sequence_maxsz +\
 825                                 encode_getdeviceinfo_maxsz)
 826 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 827                                 decode_sequence_maxsz + \
 828                                 decode_getdeviceinfo_maxsz)
 829 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 830                                 encode_sequence_maxsz + \
 831                                 encode_putfh_maxsz +        \
 832                                 encode_layoutget_maxsz)
 833 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 834                                 decode_sequence_maxsz + \
 835                                 decode_putfh_maxsz +        \
 836                                 decode_layoutget_maxsz)
 837 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 838                                 encode_sequence_maxsz +\
 839                                 encode_putfh_maxsz + \
 840                                 encode_layoutcommit_maxsz + \
 841                                 encode_getattr_maxsz)
 842 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 843                                 decode_sequence_maxsz + \
 844                                 decode_putfh_maxsz + \
 845                                 decode_layoutcommit_maxsz + \
 846                                 decode_getattr_maxsz)
 847 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 848                                 encode_sequence_maxsz + \
 849                                 encode_putfh_maxsz + \
 850                                 encode_layoutreturn_maxsz)
 851 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 852                                 decode_sequence_maxsz + \
 853                                 decode_putfh_maxsz + \
 854                                 decode_layoutreturn_maxsz)
 855 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 856                                         encode_sequence_maxsz + \
 857                                         encode_putrootfh_maxsz +\
 858                                         encode_secinfo_no_name_maxsz)
 859 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 860                                         decode_sequence_maxsz + \
 861                                         decode_putrootfh_maxsz + \
 862                                         decode_secinfo_no_name_maxsz)
 863 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 864                                          encode_sequence_maxsz + \
 865                                          encode_test_stateid_maxsz)
 866 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 867                                          decode_sequence_maxsz + \
 868                                          decode_test_stateid_maxsz)
 869 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 870                                          encode_sequence_maxsz + \
 871                                          encode_free_stateid_maxsz)
 872 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 873                                          decode_sequence_maxsz + \
 874                                          decode_free_stateid_maxsz)
 875
 876 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 877                                       compound_encode_hdr_maxsz +
 878                                       encode_sequence_maxsz +
 879                                       encode_putfh_maxsz +
 880                                       encode_getattr_maxsz) *
 881                                      XDR_UNIT);
 882
 883 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 884                                      compound_decode_hdr_maxsz +
 885                                      decode_sequence_maxsz +
 886                                      decode_putfh_maxsz) *
 887                                     XDR_UNIT);
 888
 889 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 890                                            compound_decode_hdr_maxsz +
 891                                            decode_sequence_maxsz) *
 892                                           XDR_UNIT);
 893 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 894 #endif /* CONFIG_NFS_V4_1 */
 895
 896 static const umode_t nfs_type2fmt[] = {
 897         [NF4BAD] = 0,
 898         [NF4REG] = S_IFREG,
 899         [NF4DIR] = S_IFDIR,
 900         [NF4BLK] = S_IFBLK,
 901         [NF4CHR] = S_IFCHR,
 902         [NF4LNK] = S_IFLNK,
 903         [NF4SOCK] = S_IFSOCK,
 904         [NF4FIFO] = S_IFIFO,
 905         [NF4ATTRDIR] = 0,
 906         [NF4NAMEDATTR] = 0,
 907 };
 908
 909 struct compound_hdr {
 910         int32_t         status;
 911         uint32_t        nops;
 912         __be32 *        nops_p;
 913         uint32_t        taglen;
 914         char *          tag;
 915         uint32_t        replen;         /* expected reply words */
 916         u32             minorversion;
 917 };
 918
 919 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 920 {
 921         __be32 *p = xdr_reserve_space(xdr, nbytes);
 922         BUG_ON(!p);
 923         return p;
 924 }
 925
 926 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 927 {
 928         __be32 *p;
 929
 930         p = xdr_reserve_space(xdr, len);
 931         xdr_encode_opaque_fixed(p, buf, len);
 932 }
 933
 934 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 935 {
 936         __be32 *p;
 937
 938         p = reserve_space(xdr, 4 + len);
 939         xdr_encode_opaque(p, str, len);
 940 }
 941
 942 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 943 {
 944         __be32 *p;
 945
 946         p = reserve_space(xdr, 4);
 947         *p = cpu_to_be32(n);
 948 }
 949
 950 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 951 {
 952         __be32 *p;
 953
 954         p = reserve_space(xdr, 8);
 955         xdr_encode_hyper(p, n);
 956 }
 957
 958 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 959                 const struct nfs_seqid *seqid)
 960 {
 961         encode_uint32(xdr, seqid->sequence->counter);
 962 }
 963
 964 static void encode_compound_hdr(struct xdr_stream *xdr,
 965                                 struct rpc_rqst *req,
 966                                 struct compound_hdr *hdr)
 967 {
 968         __be32 *p;
 969         struct rpc_auth *auth = req->rq_cred->cr_auth;
 970
 971         /* initialize running count of expected bytes in reply.
 972          * NOTE: the replied tag SHOULD be the same is the one sent,
 973          * but this is not required as a MUST for the server to do so. */
 974         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 975
 976         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 977         encode_string(xdr, hdr->taglen, hdr->tag);
 978         p = reserve_space(xdr, 8);
 979         *p++ = cpu_to_be32(hdr->minorversion);
 980         hdr->nops_p = p;
 981         *p = cpu_to_be32(hdr->nops);
 982 }
 983
 984 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 985                 uint32_t replen,
 986                 struct compound_hdr *hdr)
 987 {
 988         encode_uint32(xdr, op);
 989         hdr->nops++;
 990         hdr->replen += replen;
 991 }
 992
 993 static void encode_nops(struct compound_hdr *hdr)
 994 {
 995         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 996         *hdr->nops_p = htonl(hdr->nops);
 997 }
 998
 999 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1000 {
1001         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1002 }
1003
1004 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1005 {
1006         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1007 }
1008
1009 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1010                                 const struct nfs4_label *label,
1011                                 const struct nfs_server *server)
1012 {
1013         char owner_name[IDMAP_NAMESZ];
1014         char owner_group[IDMAP_NAMESZ];
1015         int owner_namelen = 0;
1016         int owner_grouplen = 0;
1017         __be32 *p;
1018         unsigned i;
1019         uint32_t len = 0;
1020         uint32_t bmval_len;
1021         uint32_t bmval[3] = { 0 };
1022
1023         /*
1024          * We reserve enough space to write the entire attribute buffer at once.
1025          * In the worst-case, this would be
1026          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1027          * = 40 bytes, plus any contribution from variable-length fields
1028          *            such as owner/group.
1029          */
1030         if (iap->ia_valid & ATTR_SIZE) {
1031                 bmval[0] |= FATTR4_WORD0_SIZE;
1032                 len += 8;
1033         }
1034         if (iap->ia_valid & ATTR_MODE) {
1035                 bmval[1] |= FATTR4_WORD1_MODE;
1036                 len += 4;
1037         }
1038         if (iap->ia_valid & ATTR_UID) {
1039                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1040                 if (owner_namelen < 0) {
1041                         dprintk("nfs: couldn't resolve uid %d to string\n",
1042                                         from_kuid(&init_user_ns, iap->ia_uid));
1043                         /* XXX */
1044                         strcpy(owner_name, "nobody");
1045                         owner_namelen = sizeof("nobody") - 1;
1046                         /* goto out; */
1047                 }
1048                 bmval[1] |= FATTR4_WORD1_OWNER;
1049                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1050         }
1051         if (iap->ia_valid & ATTR_GID) {
1052                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1053                 if (owner_grouplen < 0) {
1054                         dprintk("nfs: couldn't resolve gid %d to string\n",
1055                                         from_kgid(&init_user_ns, iap->ia_gid));
1056                         strcpy(owner_group, "nobody");
1057                         owner_grouplen = sizeof("nobody") - 1;
1058                         /* goto out; */
1059                 }
1060                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1061                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1062         }
1063         if (iap->ia_valid & ATTR_ATIME_SET) {
1064                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065                 len += 16;
1066         } else if (iap->ia_valid & ATTR_ATIME) {
1067                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1068                 len += 4;
1069         }
1070         if (iap->ia_valid & ATTR_MTIME_SET) {
1071                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1072                 len += 16;
1073         } else if (iap->ia_valid & ATTR_MTIME) {
1074                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1075                 len += 4;
1076         }
1077         if (label) {
1078                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1079                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1080         }
1081
1082         if (bmval[2] != 0)
1083                 bmval_len = 3;
1084         else if (bmval[1] != 0)
1085                 bmval_len = 2;
1086         else
1087                 bmval_len = 1;
1088
1089         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1090
1091         *p++ = cpu_to_be32(bmval_len);
1092         for (i = 0; i < bmval_len; i++)
1093                 *p++ = cpu_to_be32(bmval[i]);
1094         *p++ = cpu_to_be32(len);
1095
1096         if (bmval[0] & FATTR4_WORD0_SIZE)
1097                 p = xdr_encode_hyper(p, iap->ia_size);
1098         if (bmval[1] & FATTR4_WORD1_MODE)
1099                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1100         if (bmval[1] & FATTR4_WORD1_OWNER)
1101                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1102         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1103                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1104         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1105                 if (iap->ia_valid & ATTR_ATIME_SET) {
1106                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1107                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1108                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1109                 } else
1110                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1111         }
1112         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1113                 if (iap->ia_valid & ATTR_MTIME_SET) {
1114                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1115                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1116                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1117                 } else
1118                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1119         }
1120         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1121                 *p++ = cpu_to_be32(label->lfs);
1122                 *p++ = cpu_to_be32(label->pi);
1123                 *p++ = cpu_to_be32(label->len);
1124                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1125         }
1126
1127 /* out: */
1128 }
1129
1130 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1131 {
1132         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1133         encode_uint32(xdr, access);
1134 }
1135
1136 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1137 {
1138         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1139         encode_nfs4_seqid(xdr, arg->seqid);
1140         encode_nfs4_stateid(xdr, arg->stateid);
1141 }
1142
1143 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1144 {
1145         __be32 *p;
1146
1147         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1148         p = reserve_space(xdr, 12);
1149         p = xdr_encode_hyper(p, args->offset);
1150         *p = cpu_to_be32(args->count);
1151 }
1152
1153 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1154 {
1155         __be32 *p;
1156
1157         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1158         encode_uint32(xdr, create->ftype);
1159
1160         switch (create->ftype) {
1161         case NF4LNK:
1162                 p = reserve_space(xdr, 4);
1163                 *p = cpu_to_be32(create->u.symlink.len);
1164                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1165                 break;
1166
1167         case NF4BLK: case NF4CHR:
1168                 p = reserve_space(xdr, 8);
1169                 *p++ = cpu_to_be32(create->u.device.specdata1);
1170                 *p = cpu_to_be32(create->u.device.specdata2);
1171                 break;
1172
1173         default:
1174                 break;
1175         }
1176
1177         encode_string(xdr, create->name->len, create->name->name);
1178         encode_attrs(xdr, create->attrs, create->label, create->server);
1179 }
1180
1181 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1182 {
1183         __be32 *p;
1184
1185         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1186         p = reserve_space(xdr, 8);
1187         *p++ = cpu_to_be32(1);
1188         *p = cpu_to_be32(bitmap);
1189 }
1190
1191 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1192 {
1193         __be32 *p;
1194
1195         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196         p = reserve_space(xdr, 12);
1197         *p++ = cpu_to_be32(2);
1198         *p++ = cpu_to_be32(bm0);
1199         *p = cpu_to_be32(bm1);
1200 }
1201
1202 static void
1203 encode_getattr_three(struct xdr_stream *xdr,
1204                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1205                      struct compound_hdr *hdr)
1206 {
1207         __be32 *p;
1208
1209         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210         if (bm2) {
1211                 p = reserve_space(xdr, 16);
1212                 *p++ = cpu_to_be32(3);
1213                 *p++ = cpu_to_be32(bm0);
1214                 *p++ = cpu_to_be32(bm1);
1215                 *p = cpu_to_be32(bm2);
1216         } else if (bm1) {
1217                 p = reserve_space(xdr, 12);
1218                 *p++ = cpu_to_be32(2);
1219                 *p++ = cpu_to_be32(bm0);
1220                 *p = cpu_to_be32(bm1);
1221         } else {
1222                 p = reserve_space(xdr, 8);
1223                 *p++ = cpu_to_be32(1);
1224                 *p = cpu_to_be32(bm0);
1225         }
1226 }
1227
1228 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1229 {
1230         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1231                            bitmask[1] & nfs4_fattr_bitmap[1],
1232                            bitmask[2] & nfs4_fattr_bitmap[2],
1233                            hdr);
1234 }
1235
1236 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1237                                  const u32 *open_bitmap,
1238                                  struct compound_hdr *hdr)
1239 {
1240         encode_getattr_three(xdr,
1241                              bitmask[0] & open_bitmap[0],
1242                              bitmask[1] & open_bitmap[1],
1243                              bitmask[2] & open_bitmap[2],
1244                              hdr);
1245 }
1246
1247 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1248 {
1249         encode_getattr_three(xdr,
1250                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1251                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1252                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1253                              hdr);
1254 }
1255
1256 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1257 {
1258         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1259                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1260 }
1261
1262 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1263 {
1264         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1265 }
1266
1267 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1268 {
1269         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1270         encode_string(xdr, name->len, name->name);
1271 }
1272
1273 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1274 {
1275         if (fl->fl_type == F_RDLCK)
1276                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1277         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1278 }
1279
1280 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1281 {
1282         if (fl->fl_end == OFFSET_MAX)
1283                 return ~(uint64_t)0;
1284         return fl->fl_end - fl->fl_start + 1;
1285 }
1286
1287 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1288 {
1289         __be32 *p;
1290
1291         p = reserve_space(xdr, 32);
1292         p = xdr_encode_hyper(p, lowner->clientid);
1293         *p++ = cpu_to_be32(20);
1294         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1295         *p++ = cpu_to_be32(lowner->s_dev);
1296         xdr_encode_hyper(p, lowner->id);
1297 }
1298
1299 /*
1300  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1301  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1302  */
1303 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1308         p = reserve_space(xdr, 28);
1309         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1310         *p++ = cpu_to_be32(args->reclaim);
1311         p = xdr_encode_hyper(p, args->fl->fl_start);
1312         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1313         *p = cpu_to_be32(args->new_lock_owner);
1314         if (args->new_lock_owner){
1315                 encode_nfs4_seqid(xdr, args->open_seqid);
1316                 encode_nfs4_stateid(xdr, args->open_stateid);
1317                 encode_nfs4_seqid(xdr, args->lock_seqid);
1318                 encode_lockowner(xdr, &args->lock_owner);
1319         }
1320         else {
1321                 encode_nfs4_stateid(xdr, args->lock_stateid);
1322                 encode_nfs4_seqid(xdr, args->lock_seqid);
1323         }
1324 }
1325
1326 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1327 {
1328         __be32 *p;
1329
1330         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1331         p = reserve_space(xdr, 20);
1332         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335         encode_lockowner(xdr, &args->lock_owner);
1336 }
1337
1338 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1339 {
1340         __be32 *p;
1341
1342         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1343         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1344         encode_nfs4_seqid(xdr, args->seqid);
1345         encode_nfs4_stateid(xdr, args->stateid);
1346         p = reserve_space(xdr, 16);
1347         p = xdr_encode_hyper(p, args->fl->fl_start);
1348         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1349 }
1350
1351 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1352 {
1353         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1354         encode_lockowner(xdr, lowner);
1355 }
1356
1357 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1358 {
1359         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1360         encode_string(xdr, name->len, name->name);
1361 }
1362
1363 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1364 {
1365         __be32 *p;
1366
1367         p = reserve_space(xdr, 8);
1368         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1369         case FMODE_READ:
1370                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1371                 break;
1372         case FMODE_WRITE:
1373                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1374                 break;
1375         case FMODE_READ|FMODE_WRITE:
1376                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1377                 break;
1378         default:
1379                 *p++ = cpu_to_be32(0);
1380         }
1381         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1382 }
1383
1384 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1385 {
1386         __be32 *p;
1387  /*
1388  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1389  * owner 4 = 32
1390  */
1391         encode_nfs4_seqid(xdr, arg->seqid);
1392         encode_share_access(xdr, arg->fmode);
1393         p = reserve_space(xdr, 36);
1394         p = xdr_encode_hyper(p, arg->clientid);
1395         *p++ = cpu_to_be32(24);
1396         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1397         *p++ = cpu_to_be32(arg->server->s_dev);
1398         *p++ = cpu_to_be32(arg->id.uniquifier);
1399         xdr_encode_hyper(p, arg->id.create_time);
1400 }
1401
1402 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1403 {
1404         struct iattr dummy;
1405         __be32 *p;
1406
1407         p = reserve_space(xdr, 4);
1408         switch(arg->createmode) {
1409         case NFS4_CREATE_UNCHECKED:
1410                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1411                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1412                 break;
1413         case NFS4_CREATE_GUARDED:
1414                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1415                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1416                 break;
1417         case NFS4_CREATE_EXCLUSIVE:
1418                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1419                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1420                 break;
1421         case NFS4_CREATE_EXCLUSIVE4_1:
1422                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1423                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1424                 dummy.ia_valid = 0;
1425                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1426         }
1427 }
1428
1429 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         switch (arg->open_flags & O_CREAT) {
1435         case 0:
1436                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1437                 break;
1438         default:
1439                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1440                 encode_createmode(xdr, arg);
1441         }
1442 }
1443
1444 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1445 {
1446         __be32 *p;
1447
1448         p = reserve_space(xdr, 4);
1449         switch (delegation_type) {
1450         case 0:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1452                 break;
1453         case FMODE_READ:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1455                 break;
1456         case FMODE_WRITE|FMODE_READ:
1457                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1458                 break;
1459         default:
1460                 BUG();
1461         }
1462 }
1463
1464 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1465 {
1466         __be32 *p;
1467
1468         p = reserve_space(xdr, 4);
1469         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1470         encode_string(xdr, name->len, name->name);
1471 }
1472
1473 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1474 {
1475         __be32 *p;
1476
1477         p = reserve_space(xdr, 4);
1478         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1479         encode_delegation_type(xdr, type);
1480 }
1481
1482 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1488         encode_nfs4_stateid(xdr, stateid);
1489         encode_string(xdr, name->len, name->name);
1490 }
1491
1492 static inline void encode_claim_fh(struct xdr_stream *xdr)
1493 {
1494         __be32 *p;
1495
1496         p = reserve_space(xdr, 4);
1497         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1498 }
1499
1500 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4);
1505         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1506         encode_nfs4_stateid(xdr, stateid);
1507 }
1508
1509 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1510 {
1511         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1512         encode_openhdr(xdr, arg);
1513         encode_opentype(xdr, arg);
1514         switch (arg->claim) {
1515         case NFS4_OPEN_CLAIM_NULL:
1516                 encode_claim_null(xdr, arg->name);
1517                 break;
1518         case NFS4_OPEN_CLAIM_PREVIOUS:
1519                 encode_claim_previous(xdr, arg->u.delegation_type);
1520                 break;
1521         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1522                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1523                 break;
1524         case NFS4_OPEN_CLAIM_FH:
1525                 encode_claim_fh(xdr);
1526                 break;
1527         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1528                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1529                 break;
1530         default:
1531                 BUG();
1532         }
1533 }
1534
1535 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1536 {
1537         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1538         encode_nfs4_stateid(xdr, arg->stateid);
1539         encode_nfs4_seqid(xdr, arg->seqid);
1540 }
1541
1542 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1543 {
1544         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1545         encode_nfs4_stateid(xdr, arg->stateid);
1546         encode_nfs4_seqid(xdr, arg->seqid);
1547         encode_share_access(xdr, arg->fmode);
1548 }
1549
1550 static void
1551 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1554         encode_string(xdr, fh->size, fh->data);
1555 }
1556
1557 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1558 {
1559         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1560 }
1561
1562 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1563                         struct compound_hdr *hdr)
1564 {
1565         __be32 *p;
1566
1567         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1568         encode_nfs4_stateid(xdr, &args->stateid);
1569
1570         p = reserve_space(xdr, 12);
1571         p = xdr_encode_hyper(p, args->offset);
1572         *p = cpu_to_be32(args->count);
1573 }
1574
1575 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1576 {
1577         uint32_t attrs[3] = {
1578                 FATTR4_WORD0_RDATTR_ERROR,
1579                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1580         };
1581         uint32_t dircount = readdir->count >> 1;
1582         __be32 *p, verf[2];
1583         uint32_t attrlen = 0;
1584         unsigned int i;
1585
1586         if (readdir->plus) {
1587                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1588                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1589                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1590                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1591                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1592                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1593                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594                 dircount >>= 1;
1595         }
1596         /* Use mounted_on_fileid only if the server supports it */
1597         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1598                 attrs[0] |= FATTR4_WORD0_FILEID;
1599         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1600                 attrs[i] &= readdir->bitmask[i];
1601                 if (attrs[i] != 0)
1602                         attrlen = i+1;
1603         }
1604
1605         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1606         encode_uint64(xdr, readdir->cookie);
1607         encode_nfs4_verifier(xdr, &readdir->verifier);
1608         p = reserve_space(xdr, 12 + (attrlen << 2));
1609         *p++ = cpu_to_be32(dircount);
1610         *p++ = cpu_to_be32(readdir->count);
1611         *p++ = cpu_to_be32(attrlen);
1612         for (i = 0; i < attrlen; i++)
1613                 *p++ = cpu_to_be32(attrs[i]);
1614         memcpy(verf, readdir->verifier.data, sizeof(verf));
1615
1616         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1617                         __func__,
1618                         (unsigned long long)readdir->cookie,
1619                         verf[0], verf[1],
1620                         attrs[0] & readdir->bitmask[0],
1621                         attrs[1] & readdir->bitmask[1],
1622                         attrs[2] & readdir->bitmask[2]);
1623 }
1624
1625 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1626 {
1627         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1628 }
1629
1630 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1633         encode_string(xdr, name->len, name->name);
1634 }
1635
1636 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1637 {
1638         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1639         encode_string(xdr, oldname->len, oldname->name);
1640         encode_string(xdr, newname->len, newname->name);
1641 }
1642
1643 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1644                          struct compound_hdr *hdr)
1645 {
1646         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1647         encode_uint64(xdr, clid);
1648 }
1649
1650 static void
1651 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652 {
1653         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1654 }
1655
1656 static void
1657 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1658 {
1659         __be32 *p;
1660
1661         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1662         encode_nfs4_stateid(xdr, &zero_stateid);
1663         p = reserve_space(xdr, 2*4);
1664         *p++ = cpu_to_be32(1);
1665         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1666         p = reserve_space(xdr, 4);
1667         *p = cpu_to_be32(arg->acl_len);
1668         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1669 }
1670
1671 static void
1672 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1673 {
1674         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1675 }
1676
1677 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1678 {
1679         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1680         encode_nfs4_stateid(xdr, &arg->stateid);
1681         encode_attrs(xdr, arg->iap, arg->label, server);
1682 }
1683
1684 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1685 {
1686         __be32 *p;
1687
1688         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1689         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1690
1691         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1692         p = reserve_space(xdr, 4);
1693         *p = cpu_to_be32(setclientid->sc_prog);
1694         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1695         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_cb_ident);
1698 }
1699
1700 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1701 {
1702         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1703                         decode_setclientid_confirm_maxsz, hdr);
1704         encode_uint64(xdr, arg->clientid);
1705         encode_nfs4_verifier(xdr, &arg->confirm);
1706 }
1707
1708 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1709                          struct compound_hdr *hdr)
1710 {
1711         __be32 *p;
1712
1713         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1714         encode_nfs4_stateid(xdr, &args->stateid);
1715
1716         p = reserve_space(xdr, 16);
1717         p = xdr_encode_hyper(p, args->offset);
1718         *p++ = cpu_to_be32(args->stable);
1719         *p = cpu_to_be32(args->count);
1720
1721         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1722 }
1723
1724 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1725 {
1726         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1727         encode_nfs4_stateid(xdr, stateid);
1728 }
1729
1730 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1731 {
1732         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1733         encode_string(xdr, name->len, name->name);
1734 }
1735
1736 #if defined(CONFIG_NFS_V4_1)
1737 /* NFSv4.1 operations */
1738 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1739                                    struct nfs4_session *session,
1740                                    struct compound_hdr *hdr)
1741 {
1742         __be32 *p;
1743
1744         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1745                 decode_bind_conn_to_session_maxsz, hdr);
1746         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1747         p = xdr_reserve_space(xdr, 8);
1748         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1749         *p = 0; /* use_conn_in_rdma_mode = False */
1750 }
1751
1752 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1753 {
1754         unsigned int i;
1755         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1756         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1757                 encode_uint32(xdr, op_map->u.words[i]);
1758 }
1759
1760 static void encode_exchange_id(struct xdr_stream *xdr,
1761                                struct nfs41_exchange_id_args *args,
1762                                struct compound_hdr *hdr)
1763 {
1764         __be32 *p;
1765         char impl_name[IMPL_NAME_LIMIT];
1766         int len = 0;
1767
1768         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1769         encode_nfs4_verifier(xdr, args->verifier);
1770
1771         encode_string(xdr, args->id_len, args->id);
1772
1773         encode_uint32(xdr, args->flags);
1774         encode_uint32(xdr, args->state_protect.how);
1775
1776         switch (args->state_protect.how) {
1777         case SP4_NONE:
1778                 break;
1779         case SP4_MACH_CRED:
1780                 encode_op_map(xdr, &args->state_protect.enforce);
1781                 encode_op_map(xdr, &args->state_protect.allow);
1782                 break;
1783         default:
1784                 WARN_ON_ONCE(1);
1785                 break;
1786         }
1787
1788         if (send_implementation_id &&
1789             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1790             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1791                 <= sizeof(impl_name) + 1)
1792                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1793                                utsname()->sysname, utsname()->release,
1794                                utsname()->version, utsname()->machine);
1795
1796         if (len > 0) {
1797                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1798
1799                 encode_string(xdr,
1800                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1801                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1802                 encode_string(xdr, len, impl_name);
1803                 /* just send zeros for nii_date - the date is in nii_name */
1804                 p = reserve_space(xdr, 12);
1805                 p = xdr_encode_hyper(p, 0);
1806                 *p = cpu_to_be32(0);
1807         } else
1808                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1809 }
1810
1811 static void encode_create_session(struct xdr_stream *xdr,
1812                                   struct nfs41_create_session_args *args,
1813                                   struct compound_hdr *hdr)
1814 {
1815         __be32 *p;
1816         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1817         uint32_t len;
1818         struct nfs_client *clp = args->client;
1819         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1820         u32 max_resp_sz_cached;
1821
1822         /*
1823          * Assumes OPEN is the biggest non-idempotent compound.
1824          * 2 is the verifier.
1825          */
1826         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1827                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1828
1829         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1830                         clp->cl_ipaddr);
1831
1832         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1833         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1834         p = xdr_encode_hyper(p, clp->cl_clientid);
1835         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1836         *p++ = cpu_to_be32(args->flags);                        /*flags */
1837
1838         /* Fore Channel */
1839         *p++ = cpu_to_be32(0);                          /* header padding size */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1841         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1842         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1843         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1844         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1845         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1846
1847         /* Back Channel */
1848         *p++ = cpu_to_be32(0);                          /* header padding size */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1851         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1852         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1853         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1854         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1855
1856         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1857         *p++ = cpu_to_be32(1);
1858         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1859
1860         /* authsys_parms rfc1831 */
1861         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1862         p = xdr_encode_opaque(p, machine_name, len);
1863         *p++ = cpu_to_be32(0);                          /* UID */
1864         *p++ = cpu_to_be32(0);                          /* GID */
1865         *p = cpu_to_be32(0);                            /* No more gids */
1866 }
1867
1868 static void encode_destroy_session(struct xdr_stream *xdr,
1869                                    struct nfs4_session *session,
1870                                    struct compound_hdr *hdr)
1871 {
1872         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1873         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1874 }
1875
1876 static void encode_destroy_clientid(struct xdr_stream *xdr,
1877                                    uint64_t clientid,
1878                                    struct compound_hdr *hdr)
1879 {
1880         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1881         encode_uint64(xdr, clientid);
1882 }
1883
1884 static void encode_reclaim_complete(struct xdr_stream *xdr,
1885                                     struct nfs41_reclaim_complete_args *args,
1886                                     struct compound_hdr *hdr)
1887 {
1888         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1889         encode_uint32(xdr, args->one_fs);
1890 }
1891 #endif /* CONFIG_NFS_V4_1 */
1892
1893 static void encode_sequence(struct xdr_stream *xdr,
1894                             const struct nfs4_sequence_args *args,
1895                             struct compound_hdr *hdr)
1896 {
1897 #if defined(CONFIG_NFS_V4_1)
1898         struct nfs4_session *session;
1899         struct nfs4_slot_table *tp;
1900         struct nfs4_slot *slot = args->sa_slot;
1901         __be32 *p;
1902
1903         tp = slot->table;
1904         session = tp->session;
1905         if (!session)
1906                 return;
1907
1908         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1909
1910         /*
1911          * Sessionid + seqid + slotid + max slotid + cache_this
1912          */
1913         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1914                 "max_slotid=%d cache_this=%d\n",
1915                 __func__,
1916                 ((u32 *)session->sess_id.data)[0],
1917                 ((u32 *)session->sess_id.data)[1],
1918                 ((u32 *)session->sess_id.data)[2],
1919                 ((u32 *)session->sess_id.data)[3],
1920                 slot->seq_nr, slot->slot_nr,
1921                 tp->highest_used_slotid, args->sa_cache_this);
1922         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1923         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1924         *p++ = cpu_to_be32(slot->seq_nr);
1925         *p++ = cpu_to_be32(slot->slot_nr);
1926         *p++ = cpu_to_be32(tp->highest_used_slotid);
1927         *p = cpu_to_be32(args->sa_cache_this);
1928 #endif /* CONFIG_NFS_V4_1 */
1929 }
1930
1931 #ifdef CONFIG_NFS_V4_1
1932 static void
1933 encode_getdevicelist(struct xdr_stream *xdr,
1934                      const struct nfs4_getdevicelist_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938         nfs4_verifier dummy = {
1939                 .data = "dummmmmy",
1940         };
1941
1942         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1943         p = reserve_space(xdr, 16);
1944         *p++ = cpu_to_be32(args->layoutclass);
1945         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1946         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1947         encode_nfs4_verifier(xdr, &dummy);
1948 }
1949
1950 static void
1951 encode_getdeviceinfo(struct xdr_stream *xdr,
1952                      const struct nfs4_getdeviceinfo_args *args,
1953                      struct compound_hdr *hdr)
1954 {
1955         __be32 *p;
1956
1957         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1958         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1959         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1960                                     NFS4_DEVICEID4_SIZE);
1961         *p++ = cpu_to_be32(args->pdev->layout_type);
1962         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1963         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968                       const struct nfs4_layoutget_args *args,
1969                       struct compound_hdr *hdr)
1970 {
1971         __be32 *p;
1972
1973         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974         p = reserve_space(xdr, 36);
1975         *p++ = cpu_to_be32(0);     /* Signal layout available */
1976         *p++ = cpu_to_be32(args->type);
1977         *p++ = cpu_to_be32(args->range.iomode);
1978         p = xdr_encode_hyper(p, args->range.offset);
1979         p = xdr_encode_hyper(p, args->range.length);
1980         p = xdr_encode_hyper(p, args->minlength);
1981         encode_nfs4_stateid(xdr, &args->stateid);
1982         encode_uint32(xdr, args->maxcount);
1983
1984         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985                 __func__,
1986                 args->type,
1987                 args->range.iomode,
1988                 (unsigned long)args->range.offset,
1989                 (unsigned long)args->range.length,
1990                 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995                     struct inode *inode,
1996                     struct nfs4_layoutcommit_args *args,
1997                     struct compound_hdr *hdr)
1998 {
1999         __be32 *p;
2000
2001         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005         p = reserve_space(xdr, 20);
2006         /* Only whole file layouts */
2007         p = xdr_encode_hyper(p, 0); /* offset */
2008         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2009         *p = cpu_to_be32(0); /* reclaim */
2010         encode_nfs4_stateid(xdr, &args->stateid);
2011         p = reserve_space(xdr, 20);
2012         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2013         p = xdr_encode_hyper(p, args->lastbytewritten);
2014         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2015         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2016
2017         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2018                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2019                         NFS_I(inode)->layout, xdr, args);
2020         } else {
2021                 encode_uint32(xdr, args->layoutupdate_len);
2022                 if (args->layoutupdate_pages) {
2023                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2024                                         args->layoutupdate_len);
2025                 }
2026         }
2027
2028         return 0;
2029 }
2030
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033                     const struct nfs4_layoutreturn_args *args,
2034                     struct compound_hdr *hdr)
2035 {
2036         __be32 *p;
2037
2038         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039         p = reserve_space(xdr, 16);
2040         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2041         *p++ = cpu_to_be32(args->layout_type);
2042         *p++ = cpu_to_be32(IOMODE_ANY);
2043         *p = cpu_to_be32(RETURN_FILE);
2044         p = reserve_space(xdr, 16);
2045         p = xdr_encode_hyper(p, 0);
2046         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2047         spin_lock(&args->inode->i_lock);
2048         encode_nfs4_stateid(xdr, &args->stateid);
2049         spin_unlock(&args->inode->i_lock);
2050         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2051                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2052                         NFS_I(args->inode)->layout, xdr, args);
2053         } else
2054                 encode_uint32(xdr, 0);
2055 }
2056
2057 static int
2058 encode_secinfo_no_name(struct xdr_stream *xdr,
2059                        const struct nfs41_secinfo_no_name_args *args,
2060                        struct compound_hdr *hdr)
2061 {
2062         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2063         encode_uint32(xdr, args->style);
2064         return 0;
2065 }
2066
2067 static void encode_test_stateid(struct xdr_stream *xdr,
2068                                 struct nfs41_test_stateid_args *args,
2069                                 struct compound_hdr *hdr)
2070 {
2071         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2072         encode_uint32(xdr, 1);
2073         encode_nfs4_stateid(xdr, args->stateid);
2074 }
2075
2076 static void encode_free_stateid(struct xdr_stream *xdr,
2077                                 struct nfs41_free_stateid_args *args,
2078                                 struct compound_hdr *hdr)
2079 {
2080         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2081         encode_nfs4_stateid(xdr, &args->stateid);
2082 }
2083 #endif /* CONFIG_NFS_V4_1 */
2084
2085 /*
2086  * END OF "GENERIC" ENCODE ROUTINES.
2087  */
2088
2089 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2090 {
2091 #if defined(CONFIG_NFS_V4_1)
2092         struct nfs4_session *session = args->sa_slot->table->session;
2093         if (session)
2094                 return session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_nops(&hdr);
2170 }
2171
2172 /*
2173  * Encode RENAME request
2174  */
2175 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2176                                 const struct nfs_renameargs *args)
2177 {
2178         struct compound_hdr hdr = {
2179                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180         };
2181
2182         encode_compound_hdr(xdr, req, &hdr);
2183         encode_sequence(xdr, &args->seq_args, &hdr);
2184         encode_putfh(xdr, args->old_dir, &hdr);
2185         encode_savefh(xdr, &hdr);
2186         encode_putfh(xdr, args->new_dir, &hdr);
2187         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2188         encode_nops(&hdr);
2189 }
2190
2191 /*
2192  * Encode LINK request
2193  */
2194 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                              const struct nfs4_link_arg *args)
2196 {
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200
2201         encode_compound_hdr(xdr, req, &hdr);
2202         encode_sequence(xdr, &args->seq_args, &hdr);
2203         encode_putfh(xdr, args->fh, &hdr);
2204         encode_savefh(xdr, &hdr);
2205         encode_putfh(xdr, args->dir_fh, &hdr);
2206         encode_link(xdr, args->name, &hdr);
2207         encode_restorefh(xdr, &hdr);
2208         encode_getfattr(xdr, args->bitmask, &hdr);
2209         encode_nops(&hdr);
2210 }
2211
2212 /*
2213  * Encode CREATE request
2214  */
2215 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                                 const struct nfs4_create_arg *args)
2217 {
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         encode_compound_hdr(xdr, req, &hdr);
2223         encode_sequence(xdr, &args->seq_args, &hdr);
2224         encode_putfh(xdr, args->dir_fh, &hdr);
2225         encode_create(xdr, args, &hdr);
2226         encode_getfh(xdr, &hdr);
2227         encode_getfattr(xdr, args->bitmask, &hdr);
2228         encode_nops(&hdr);
2229 }
2230
2231 /*
2232  * Encode SYMLINK request
2233  */
2234 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2235                                  const struct nfs4_create_arg *args)
2236 {
2237         nfs4_xdr_enc_create(req, xdr, args);
2238 }
2239
2240 /*
2241  * Encode GETATTR request
2242  */
2243 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2244                                  const struct nfs4_getattr_arg *args)
2245 {
2246         struct compound_hdr hdr = {
2247                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248         };
2249
2250         encode_compound_hdr(xdr, req, &hdr);
2251         encode_sequence(xdr, &args->seq_args, &hdr);
2252         encode_putfh(xdr, args->fh, &hdr);
2253         encode_getfattr(xdr, args->bitmask, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode a CLOSE request
2259  */
2260 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                                struct nfs_closeargs *args)
2262 {
2263         struct compound_hdr hdr = {
2264                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265         };
2266
2267         encode_compound_hdr(xdr, req, &hdr);
2268         encode_sequence(xdr, &args->seq_args, &hdr);
2269         encode_putfh(xdr, args->fh, &hdr);
2270         encode_close(xdr, args, &hdr);
2271         encode_getfattr(xdr, args->bitmask, &hdr);
2272         encode_nops(&hdr);
2273 }
2274
2275 /*
2276  * Encode an OPEN request
2277  */
2278 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2279                               struct nfs_openargs *args)
2280 {
2281         struct compound_hdr hdr = {
2282                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2283         };
2284
2285         encode_compound_hdr(xdr, req, &hdr);
2286         encode_sequence(xdr, &args->seq_args, &hdr);
2287         encode_putfh(xdr, args->fh, &hdr);
2288         encode_open(xdr, args, &hdr);
2289         encode_getfh(xdr, &hdr);
2290         if (args->access)
2291                 encode_access(xdr, args->access, &hdr);
2292         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2293         encode_nops(&hdr);
2294 }
2295
2296 /*
2297  * Encode an OPEN_CONFIRM request
2298  */
2299 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2300                                       struct xdr_stream *xdr,
2301                                       struct nfs_open_confirmargs *args)
2302 {
2303         struct compound_hdr hdr = {
2304                 .nops   = 0,
2305         };
2306
2307         encode_compound_hdr(xdr, req, &hdr);
2308         encode_putfh(xdr, args->fh, &hdr);
2309         encode_open_confirm(xdr, args, &hdr);
2310         encode_nops(&hdr);
2311 }
2312
2313 /*
2314  * Encode an OPEN request with no attributes.
2315  */
2316 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2317                                      struct xdr_stream *xdr,
2318                                      struct nfs_openargs *args)
2319 {
2320         struct compound_hdr hdr = {
2321                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2322         };
2323
2324         encode_compound_hdr(xdr, req, &hdr);
2325         encode_sequence(xdr, &args->seq_args, &hdr);
2326         encode_putfh(xdr, args->fh, &hdr);
2327         encode_open(xdr, args, &hdr);
2328         if (args->access)
2329                 encode_access(xdr, args->access, &hdr);
2330         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2331         encode_nops(&hdr);
2332 }
2333
2334 /*
2335  * Encode an OPEN_DOWNGRADE request
2336  */
2337 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2338                                         struct xdr_stream *xdr,
2339                                         struct nfs_closeargs *args)
2340 {
2341         struct compound_hdr hdr = {
2342                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343         };
2344
2345         encode_compound_hdr(xdr, req, &hdr);
2346         encode_sequence(xdr, &args->seq_args, &hdr);
2347         encode_putfh(xdr, args->fh, &hdr);
2348         encode_open_downgrade(xdr, args, &hdr);
2349         encode_getfattr(xdr, args->bitmask, &hdr);
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * Encode a LOCK request
2355  */
2356 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2357                               struct nfs_lock_args *args)
2358 {
2359         struct compound_hdr hdr = {
2360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_sequence(xdr, &args->seq_args, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_lock(xdr, args, &hdr);
2367         encode_nops(&hdr);
2368 }
2369
2370 /*
2371  * Encode a LOCKT request
2372  */
2373 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2374                                struct nfs_lockt_args *args)
2375 {
2376         struct compound_hdr hdr = {
2377                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378         };
2379
2380         encode_compound_hdr(xdr, req, &hdr);
2381         encode_sequence(xdr, &args->seq_args, &hdr);
2382         encode_putfh(xdr, args->fh, &hdr);
2383         encode_lockt(xdr, args, &hdr);
2384         encode_nops(&hdr);
2385 }
2386
2387 /*
2388  * Encode a LOCKU request
2389  */
2390 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2391                                struct nfs_locku_args *args)
2392 {
2393         struct compound_hdr hdr = {
2394                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2395         };
2396
2397         encode_compound_hdr(xdr, req, &hdr);
2398         encode_sequence(xdr, &args->seq_args, &hdr);
2399         encode_putfh(xdr, args->fh, &hdr);
2400         encode_locku(xdr, args, &hdr);
2401         encode_nops(&hdr);
2402 }
2403
2404 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2405                                            struct xdr_stream *xdr,
2406                                         struct nfs_release_lockowner_args *args)
2407 {
2408         struct compound_hdr hdr = {
2409                 .minorversion = 0,
2410         };
2411
2412         encode_compound_hdr(xdr, req, &hdr);
2413         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2414         encode_nops(&hdr);
2415 }
2416
2417 /*
2418  * Encode a READLINK request
2419  */
2420 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2421                                   const struct nfs4_readlink *args)
2422 {
2423         struct compound_hdr hdr = {
2424                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425         };
2426
2427         encode_compound_hdr(xdr, req, &hdr);
2428         encode_sequence(xdr, &args->seq_args, &hdr);
2429         encode_putfh(xdr, args->fh, &hdr);
2430         encode_readlink(xdr, args, req, &hdr);
2431
2432         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2433                         args->pgbase, args->pglen);
2434         encode_nops(&hdr);
2435 }
2436
2437 /*
2438  * Encode a READDIR request
2439  */
2440 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2441                                  const struct nfs4_readdir_arg *args)
2442 {
2443         struct compound_hdr hdr = {
2444                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445         };
2446
2447         encode_compound_hdr(xdr, req, &hdr);
2448         encode_sequence(xdr, &args->seq_args, &hdr);
2449         encode_putfh(xdr, args->fh, &hdr);
2450         encode_readdir(xdr, args, req, &hdr);
2451
2452         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2453                          args->pgbase, args->count);
2454         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2455                         __func__, hdr.replen << 2, args->pages,
2456                         args->pgbase, args->count);
2457         encode_nops(&hdr);
2458 }
2459
2460 /*
2461  * Encode a READ request
2462  */
2463 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2464                               struct nfs_pgio_args *args)
2465 {
2466         struct compound_hdr hdr = {
2467                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2468         };
2469
2470         encode_compound_hdr(xdr, req, &hdr);
2471         encode_sequence(xdr, &args->seq_args, &hdr);
2472         encode_putfh(xdr, args->fh, &hdr);
2473         encode_read(xdr, args, &hdr);
2474
2475         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2476                          args->pages, args->pgbase, args->count);
2477         req->rq_rcv_buf.flags |= XDRBUF_READ;
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * Encode an SETATTR request
2483  */
2484 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2485                                  struct nfs_setattrargs *args)
2486 {
2487         struct compound_hdr hdr = {
2488                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2489         };
2490
2491         encode_compound_hdr(xdr, req, &hdr);
2492         encode_sequence(xdr, &args->seq_args, &hdr);
2493         encode_putfh(xdr, args->fh, &hdr);
2494         encode_setattr(xdr, args, args->server, &hdr);
2495         encode_getfattr(xdr, args->bitmask, &hdr);
2496         encode_nops(&hdr);
2497 }
2498
2499 /*
2500  * Encode a GETACL request
2501  */
2502 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2503                                 struct nfs_getaclargs *args)
2504 {
2505         struct compound_hdr hdr = {
2506                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507         };
2508         uint32_t replen;
2509
2510         encode_compound_hdr(xdr, req, &hdr);
2511         encode_sequence(xdr, &args->seq_args, &hdr);
2512         encode_putfh(xdr, args->fh, &hdr);
2513         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2514         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2515
2516         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2517                 args->acl_pages, args->acl_pgbase, args->acl_len);
2518
2519         encode_nops(&hdr);
2520 }
2521
2522 /*
2523  * Encode a WRITE request
2524  */
2525 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2526                                struct nfs_pgio_args *args)
2527 {
2528         struct compound_hdr hdr = {
2529                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2530         };
2531
2532         encode_compound_hdr(xdr, req, &hdr);
2533         encode_sequence(xdr, &args->seq_args, &hdr);
2534         encode_putfh(xdr, args->fh, &hdr);
2535         encode_write(xdr, args, &hdr);
2536         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2537         if (args->bitmask)
2538                 encode_getfattr(xdr, args->bitmask, &hdr);
2539         encode_nops(&hdr);
2540 }
2541
2542 /*
2543  *  a COMMIT request
2544  */
2545 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2546                                 struct nfs_commitargs *args)
2547 {
2548         struct compound_hdr hdr = {
2549                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2550         };
2551
2552         encode_compound_hdr(xdr, req, &hdr);
2553         encode_sequence(xdr, &args->seq_args, &hdr);
2554         encode_putfh(xdr, args->fh, &hdr);
2555         encode_commit(xdr, args, &hdr);
2556         encode_nops(&hdr);
2557 }
2558
2559 /*
2560  * FSINFO request
2561  */
2562 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2563                                 struct nfs4_fsinfo_arg *args)
2564 {
2565         struct compound_hdr hdr = {
2566                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2567         };
2568
2569         encode_compound_hdr(xdr, req, &hdr);
2570         encode_sequence(xdr, &args->seq_args, &hdr);
2571         encode_putfh(xdr, args->fh, &hdr);
2572         encode_fsinfo(xdr, args->bitmask, &hdr);
2573         encode_nops(&hdr);
2574 }
2575
2576 /*
2577  * a PATHCONF request
2578  */
2579 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                                   const struct nfs4_pathconf_arg *args)
2581 {
2582         struct compound_hdr hdr = {
2583                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2584         };
2585
2586         encode_compound_hdr(xdr, req, &hdr);
2587         encode_sequence(xdr, &args->seq_args, &hdr);
2588         encode_putfh(xdr, args->fh, &hdr);
2589         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2590                            &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * a STATFS request
2596  */
2597 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2598                                 const struct nfs4_statfs_arg *args)
2599 {
2600         struct compound_hdr hdr = {
2601                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2602         };
2603
2604         encode_compound_hdr(xdr, req, &hdr);
2605         encode_sequence(xdr, &args->seq_args, &hdr);
2606         encode_putfh(xdr, args->fh, &hdr);
2607         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2608                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2609         encode_nops(&hdr);
2610 }
2611
2612 /*
2613  * GETATTR_BITMAP request
2614  */
2615 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2616                                      struct xdr_stream *xdr,
2617                                      struct nfs4_server_caps_arg *args)
2618 {
2619         struct compound_hdr hdr = {
2620                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2621         };
2622
2623         encode_compound_hdr(xdr, req, &hdr);
2624         encode_sequence(xdr, &args->seq_args, &hdr);
2625         encode_putfh(xdr, args->fhandle, &hdr);
2626         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2627                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2628                            FATTR4_WORD0_LINK_SUPPORT|
2629                            FATTR4_WORD0_SYMLINK_SUPPORT|
2630                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * a RENEW request
2636  */
2637 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2638                                struct nfs_client *clp)
2639 {
2640         struct compound_hdr hdr = {
2641                 .nops   = 0,
2642         };
2643
2644         encode_compound_hdr(xdr, req, &hdr);
2645         encode_renew(xdr, clp->cl_clientid, &hdr);
2646         encode_nops(&hdr);
2647 }
2648
2649 /*
2650  * a SETCLIENTID request
2651  */
2652 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2653                                      struct xdr_stream *xdr,
2654                                      struct nfs4_setclientid *sc)
2655 {
2656         struct compound_hdr hdr = {
2657                 .nops   = 0,
2658         };
2659
2660         encode_compound_hdr(xdr, req, &hdr);
2661         encode_setclientid(xdr, sc, &hdr);
2662         encode_nops(&hdr);
2663 }
2664
2665 /*
2666  * a SETCLIENTID_CONFIRM request
2667  */
2668 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2669                                              struct xdr_stream *xdr,
2670                                              struct nfs4_setclientid_res *arg)
2671 {
2672         struct compound_hdr hdr = {
2673                 .nops   = 0,
2674         };
2675
2676         encode_compound_hdr(xdr, req, &hdr);
2677         encode_setclientid_confirm(xdr, arg, &hdr);
2678         encode_nops(&hdr);
2679 }
2680
2681 /*
2682  * DELEGRETURN request
2683  */
2684 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2685                                      struct xdr_stream *xdr,
2686                                      const struct nfs4_delegreturnargs *args)
2687 {
2688         struct compound_hdr hdr = {
2689                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2690         };
2691
2692         encode_compound_hdr(xdr, req, &hdr);
2693         encode_sequence(xdr, &args->seq_args, &hdr);
2694         encode_putfh(xdr, args->fhandle, &hdr);
2695         encode_getfattr(xdr, args->bitmask, &hdr);
2696         encode_delegreturn(xdr, args->stateid, &hdr);
2697         encode_nops(&hdr);
2698 }
2699
2700 /*
2701  * Encode FS_LOCATIONS request
2702  */
2703 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2704                                       struct xdr_stream *xdr,
2705                                       struct nfs4_fs_locations_arg *args)
2706 {
2707         struct compound_hdr hdr = {
2708                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2709         };
2710         uint32_t replen;
2711
2712         encode_compound_hdr(xdr, req, &hdr);
2713         encode_sequence(xdr, &args->seq_args, &hdr);
2714         if (args->migration) {
2715                 encode_putfh(xdr, args->fh, &hdr);
2716                 replen = hdr.replen;
2717                 encode_fs_locations(xdr, args->bitmask, &hdr);
2718                 if (args->renew)
2719                         encode_renew(xdr, args->clientid, &hdr);
2720         } else {
2721                 encode_putfh(xdr, args->dir_fh, &hdr);
2722                 encode_lookup(xdr, args->name, &hdr);
2723                 replen = hdr.replen;
2724                 encode_fs_locations(xdr, args->bitmask, &hdr);
2725         }
2726
2727         /* Set up reply kvec to capture returned fs_locations array. */
2728         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2729                         0, PAGE_SIZE);
2730         encode_nops(&hdr);
2731 }
2732
2733 /*
2734  * Encode SECINFO request
2735  */
2736 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2737                                 struct xdr_stream *xdr,
2738                                 struct nfs4_secinfo_arg *args)
2739 {
2740         struct compound_hdr hdr = {
2741                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2742         };
2743
2744         encode_compound_hdr(xdr, req, &hdr);
2745         encode_sequence(xdr, &args->seq_args, &hdr);
2746         encode_putfh(xdr, args->dir_fh, &hdr);
2747         encode_secinfo(xdr, args->name, &hdr);
2748         encode_nops(&hdr);
2749 }
2750
2751 /*
2752  * Encode FSID_PRESENT request
2753  */
2754 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2755                                       struct xdr_stream *xdr,
2756                                       struct nfs4_fsid_present_arg *args)
2757 {
2758         struct compound_hdr hdr = {
2759                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2760         };
2761
2762         encode_compound_hdr(xdr, req, &hdr);
2763         encode_sequence(xdr, &args->seq_args, &hdr);
2764         encode_putfh(xdr, args->fh, &hdr);
2765         encode_getfh(xdr, &hdr);
2766         if (args->renew)
2767                 encode_renew(xdr, args->clientid, &hdr);
2768         encode_nops(&hdr);
2769 }
2770
2771 #if defined(CONFIG_NFS_V4_1)
2772 /*
2773  * BIND_CONN_TO_SESSION request
2774  */
2775 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2776                                 struct xdr_stream *xdr,
2777                                 struct nfs_client *clp)
2778 {
2779         struct compound_hdr hdr = {
2780                 .minorversion = clp->cl_mvops->minor_version,
2781         };
2782
2783         encode_compound_hdr(xdr, req, &hdr);
2784         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2785         encode_nops(&hdr);
2786 }
2787
2788 /*
2789  * EXCHANGE_ID request
2790  */
2791 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2792                                      struct xdr_stream *xdr,
2793                                      struct nfs41_exchange_id_args *args)
2794 {
2795         struct compound_hdr hdr = {
2796                 .minorversion = args->client->cl_mvops->minor_version,
2797         };
2798
2799         encode_compound_hdr(xdr, req, &hdr);
2800         encode_exchange_id(xdr, args, &hdr);
2801         encode_nops(&hdr);
2802 }
2803
2804 /*
2805  * a CREATE_SESSION request
2806  */
2807 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2808                                         struct xdr_stream *xdr,
2809                                         struct nfs41_create_session_args *args)
2810 {
2811         struct compound_hdr hdr = {
2812                 .minorversion = args->client->cl_mvops->minor_version,
2813         };
2814
2815         encode_compound_hdr(xdr, req, &hdr);
2816         encode_create_session(xdr, args, &hdr);
2817         encode_nops(&hdr);
2818 }
2819
2820 /*
2821  * a DESTROY_SESSION request
2822  */
2823 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2824                                          struct xdr_stream *xdr,
2825                                          struct nfs4_session *session)
2826 {
2827         struct compound_hdr hdr = {
2828                 .minorversion = session->clp->cl_mvops->minor_version,
2829         };
2830
2831         encode_compound_hdr(xdr, req, &hdr);
2832         encode_destroy_session(xdr, session, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * a DESTROY_CLIENTID request
2838  */
2839 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2840                                          struct xdr_stream *xdr,
2841                                          struct nfs_client *clp)
2842 {
2843         struct compound_hdr hdr = {
2844                 .minorversion = clp->cl_mvops->minor_version,
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2849         encode_nops(&hdr);
2850 }
2851
2852 /*
2853  * a SEQUENCE request
2854  */
2855 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2856                                   struct nfs4_sequence_args *args)
2857 {
2858         struct compound_hdr hdr = {
2859                 .minorversion = nfs4_xdr_minorversion(args),
2860         };
2861
2862         encode_compound_hdr(xdr, req, &hdr);
2863         encode_sequence(xdr, args, &hdr);
2864         encode_nops(&hdr);
2865 }
2866
2867 /*
2868  * a GET_LEASE_TIME request
2869  */
2870 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2871                                         struct xdr_stream *xdr,
2872                                         struct nfs4_get_lease_time_args *args)
2873 {
2874         struct compound_hdr hdr = {
2875                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2876         };
2877         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2878
2879         encode_compound_hdr(xdr, req, &hdr);
2880         encode_sequence(xdr, &args->la_seq_args, &hdr);
2881         encode_putrootfh(xdr, &hdr);
2882         encode_fsinfo(xdr, lease_bitmap, &hdr);
2883         encode_nops(&hdr);
2884 }
2885
2886 /*
2887  * a RECLAIM_COMPLETE request
2888  */
2889 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2890                                           struct xdr_stream *xdr,
2891                                 struct nfs41_reclaim_complete_args *args)
2892 {
2893         struct compound_hdr hdr = {
2894                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2895         };
2896
2897         encode_compound_hdr(xdr, req, &hdr);
2898         encode_sequence(xdr, &args->seq_args, &hdr);
2899         encode_reclaim_complete(xdr, args, &hdr);
2900         encode_nops(&hdr);
2901 }
2902
2903 /*
2904  * Encode GETDEVICELIST request
2905  */
2906 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2907                                        struct xdr_stream *xdr,
2908                                        struct nfs4_getdevicelist_args *args)
2909 {
2910         struct compound_hdr hdr = {
2911                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2912         };
2913
2914         encode_compound_hdr(xdr, req, &hdr);
2915         encode_sequence(xdr, &args->seq_args, &hdr);
2916         encode_putfh(xdr, args->fh, &hdr);
2917         encode_getdevicelist(xdr, args, &hdr);
2918         encode_nops(&hdr);
2919 }
2920
2921 /*
2922  * Encode GETDEVICEINFO request
2923  */
2924 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2925                                        struct xdr_stream *xdr,
2926                                        struct nfs4_getdeviceinfo_args *args)
2927 {
2928         struct compound_hdr hdr = {
2929                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2930         };
2931
2932         encode_compound_hdr(xdr, req, &hdr);
2933         encode_sequence(xdr, &args->seq_args, &hdr);
2934         encode_getdeviceinfo(xdr, args, &hdr);
2935
2936         /* set up reply kvec. Subtract notification bitmap max size (2)
2937          * so that notification bitmap is put in xdr_buf tail */
2938         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2939                          args->pdev->pages, args->pdev->pgbase,
2940                          args->pdev->pglen);
2941
2942         encode_nops(&hdr);
2943 }
2944
2945 /*
2946  *  Encode LAYOUTGET request
2947  */
2948 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2949                                    struct xdr_stream *xdr,
2950                                    struct nfs4_layoutget_args *args)
2951 {
2952         struct compound_hdr hdr = {
2953                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2954         };
2955
2956         encode_compound_hdr(xdr, req, &hdr);
2957         encode_sequence(xdr, &args->seq_args, &hdr);
2958         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2959         encode_layoutget(xdr, args, &hdr);
2960
2961         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2962             args->layout.pages, 0, args->layout.pglen);
2963
2964         encode_nops(&hdr);
2965 }
2966
2967 /*
2968  *  Encode LAYOUTCOMMIT request
2969  */
2970 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2971                                       struct xdr_stream *xdr,
2972                                       struct nfs4_layoutcommit_args *args)
2973 {
2974         struct nfs4_layoutcommit_data *data =
2975                 container_of(args, struct nfs4_layoutcommit_data, args);
2976         struct compound_hdr hdr = {
2977                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2978         };
2979
2980         encode_compound_hdr(xdr, req, &hdr);
2981         encode_sequence(xdr, &args->seq_args, &hdr);
2982         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2983         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2984         encode_getfattr(xdr, args->bitmask, &hdr);
2985         encode_nops(&hdr);
2986 }
2987
2988 /*
2989  * Encode LAYOUTRETURN request
2990  */
2991 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2992                                       struct xdr_stream *xdr,
2993                                       struct nfs4_layoutreturn_args *args)
2994 {
2995         struct compound_hdr hdr = {
2996                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2997         };
2998
2999         encode_compound_hdr(xdr, req, &hdr);
3000         encode_sequence(xdr, &args->seq_args, &hdr);
3001         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3002         encode_layoutreturn(xdr, args, &hdr);
3003         encode_nops(&hdr);
3004 }
3005
3006 /*
3007  * Encode SECINFO_NO_NAME request
3008  */
3009 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3010                                         struct xdr_stream *xdr,
3011                                         struct nfs41_secinfo_no_name_args *args)
3012 {
3013         struct compound_hdr hdr = {
3014                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3015         };
3016
3017         encode_compound_hdr(xdr, req, &hdr);
3018         encode_sequence(xdr, &args->seq_args, &hdr);
3019         encode_putrootfh(xdr, &hdr);
3020         encode_secinfo_no_name(xdr, args, &hdr);
3021         encode_nops(&hdr);
3022         return 0;
3023 }
3024
3025 /*
3026  *  Encode TEST_STATEID request
3027  */
3028 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3029                                       struct xdr_stream *xdr,
3030                                       struct nfs41_test_stateid_args *args)
3031 {
3032         struct compound_hdr hdr = {
3033                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3034         };
3035
3036         encode_compound_hdr(xdr, req, &hdr);
3037         encode_sequence(xdr, &args->seq_args, &hdr);
3038         encode_test_stateid(xdr, args, &hdr);
3039         encode_nops(&hdr);
3040 }
3041
3042 /*
3043  *  Encode FREE_STATEID request
3044  */
3045 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3046                                      struct xdr_stream *xdr,
3047                                      struct nfs41_free_stateid_args *args)
3048 {
3049         struct compound_hdr hdr = {
3050                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3051         };
3052
3053         encode_compound_hdr(xdr, req, &hdr);
3054         encode_sequence(xdr, &args->seq_args, &hdr);
3055         encode_free_stateid(xdr, args, &hdr);
3056         encode_nops(&hdr);
3057 }
3058 #endif /* CONFIG_NFS_V4_1 */
3059
3060 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3061 {
3062         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3063                 "Remaining buffer length is %tu words.\n",
3064                 func, xdr->end - xdr->p);
3065 }
3066
3067 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3068 {
3069         __be32 *p;
3070
3071         p = xdr_inline_decode(xdr, 4);
3072         if (unlikely(!p))
3073                 goto out_overflow;
3074         *len = be32_to_cpup(p);
3075         p = xdr_inline_decode(xdr, *len);
3076         if (unlikely(!p))
3077                 goto out_overflow;
3078         *string = (char *)p;
3079         return 0;
3080 out_overflow:
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3086 {
3087         __be32 *p;
3088
3089         p = xdr_inline_decode(xdr, 8);
3090         if (unlikely(!p))
3091                 goto out_overflow;
3092         hdr->status = be32_to_cpup(p++);
3093         hdr->taglen = be32_to_cpup(p);
3094
3095         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3096         if (unlikely(!p))
3097                 goto out_overflow;
3098         hdr->tag = (char *)p;
3099         p += XDR_QUADLEN(hdr->taglen);
3100         hdr->nops = be32_to_cpup(p);
3101         if (unlikely(hdr->nops < 1))
3102                 return nfs4_stat_to_errno(hdr->status);
3103         return 0;
3104 out_overflow:
3105         print_overflow_msg(__func__, xdr);
3106         return -EIO;
3107 }
3108
3109 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3110                 int *nfs_retval)
3111 {
3112         __be32 *p;
3113         uint32_t opnum;
3114         int32_t nfserr;
3115
3116         p = xdr_inline_decode(xdr, 8);
3117         if (unlikely(!p))
3118                 goto out_overflow;
3119         opnum = be32_to_cpup(p++);
3120         if (unlikely(opnum != expected))
3121                 goto out_bad_operation;
3122         nfserr = be32_to_cpup(p);
3123         if (nfserr == NFS_OK)
3124                 *nfs_retval = 0;
3125         else
3126                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3127         return true;
3128 out_bad_operation:
3129         dprintk("nfs: Server returned operation"
3130                 " %d but we issued a request for %d\n",
3131                         opnum, expected);
3132         *nfs_retval = -EREMOTEIO;
3133         return false;
3134 out_overflow:
3135         print_overflow_msg(__func__, xdr);
3136         *nfs_retval = -EIO;
3137         return false;
3138 }
3139
3140 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3141 {
3142         int retval;
3143
3144         __decode_op_hdr(xdr, expected, &retval);
3145         return retval;
3146 }
3147
3148 /* Dummy routine */
3149 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3150 {
3151         __be32 *p;
3152         unsigned int strlen;
3153         char *str;
3154
3155         p = xdr_inline_decode(xdr, 12);
3156         if (likely(p))
3157                 return decode_opaque_inline(xdr, &strlen, &str);
3158         print_overflow_msg(__func__, xdr);
3159         return -EIO;
3160 }
3161
3162 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3163 {
3164         uint32_t bmlen;
3165         __be32 *p;
3166
3167         p = xdr_inline_decode(xdr, 4);
3168         if (unlikely(!p))
3169                 goto out_overflow;
3170         bmlen = be32_to_cpup(p);
3171
3172         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3173         p = xdr_inline_decode(xdr, (bmlen << 2));
3174         if (unlikely(!p))
3175                 goto out_overflow;
3176         if (bmlen > 0) {
3177                 bitmap[0] = be32_to_cpup(p++);
3178                 if (bmlen > 1) {
3179                         bitmap[1] = be32_to_cpup(p++);
3180                         if (bmlen > 2)
3181                                 bitmap[2] = be32_to_cpup(p);
3182                 }
3183         }
3184         return 0;
3185 out_overflow:
3186         print_overflow_msg(__func__, xdr);
3187         return -EIO;
3188 }
3189
3190 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3191 {
3192         __be32 *p;
3193
3194         p = xdr_inline_decode(xdr, 4);
3195         if (unlikely(!p))
3196                 goto out_overflow;
3197         *attrlen = be32_to_cpup(p);
3198         *savep = xdr_stream_pos(xdr);
3199         return 0;
3200 out_overflow:
3201         print_overflow_msg(__func__, xdr);
3202         return -EIO;
3203 }
3204
3205 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3206 {
3207         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3208                 int ret;
3209                 ret = decode_attr_bitmap(xdr, bitmask);
3210                 if (unlikely(ret < 0))
3211                         return ret;
3212                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3213         } else
3214                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3215         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3216                 bitmask[0], bitmask[1], bitmask[2]);
3217         return 0;
3218 }
3219
3220 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3221 {
3222         __be32 *p;
3223         int ret = 0;
3224
3225         *type = 0;
3226         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3227                 return -EIO;
3228         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3229                 p = xdr_inline_decode(xdr, 4);
3230                 if (unlikely(!p))
3231                         goto out_overflow;
3232                 *type = be32_to_cpup(p);
3233                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3234                         dprintk("%s: bad type %d\n", __func__, *type);
3235                         return -EIO;
3236                 }
3237                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3238                 ret = NFS_ATTR_FATTR_TYPE;
3239         }
3240         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3241         return ret;
3242 out_overflow:
3243         print_overflow_msg(__func__, xdr);
3244         return -EIO;
3245 }
3246
3247 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3248                                       uint32_t *bitmap, uint32_t *type)
3249 {
3250         __be32 *p;
3251
3252         *type = 0;
3253         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3254                 return -EIO;
3255         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3256                 p = xdr_inline_decode(xdr, 4);
3257                 if (unlikely(!p))
3258                         goto out_overflow;
3259                 *type = be32_to_cpup(p);
3260                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3261         }
3262         dprintk("%s: expire type=0x%x\n", __func__, *type);
3263         return 0;
3264 out_overflow:
3265         print_overflow_msg(__func__, xdr);
3266         return -EIO;
3267 }
3268
3269 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3270 {
3271         __be32 *p;
3272         int ret = 0;
3273
3274         *change = 0;
3275         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3276                 return -EIO;
3277         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3278                 p = xdr_inline_decode(xdr, 8);
3279                 if (unlikely(!p))
3280                         goto out_overflow;
3281                 xdr_decode_hyper(p, change);
3282                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3283                 ret = NFS_ATTR_FATTR_CHANGE;
3284         }
3285         dprintk("%s: change attribute=%Lu\n", __func__,
3286                         (unsigned long long)*change);
3287         return ret;
3288 out_overflow:
3289         print_overflow_msg(__func__, xdr);
3290         return -EIO;
3291 }
3292
3293 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3294 {
3295         __be32 *p;
3296         int ret = 0;
3297
3298         *size = 0;
3299         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3300                 return -EIO;
3301         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3302                 p = xdr_inline_decode(xdr, 8);
3303                 if (unlikely(!p))
3304                         goto out_overflow;
3305                 xdr_decode_hyper(p, size);
3306                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3307                 ret = NFS_ATTR_FATTR_SIZE;
3308         }
3309         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3310         return ret;
3311 out_overflow:
3312         print_overflow_msg(__func__, xdr);
3313         return -EIO;
3314 }
3315
3316 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3317 {
3318         __be32 *p;
3319
3320         *res = 0;
3321         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3322                 return -EIO;
3323         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3324                 p = xdr_inline_decode(xdr, 4);
3325                 if (unlikely(!p))
3326                         goto out_overflow;
3327                 *res = be32_to_cpup(p);
3328                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3329         }
3330         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3331         return 0;
3332 out_overflow:
3333         print_overflow_msg(__func__, xdr);
3334         return -EIO;
3335 }
3336
3337 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3338 {
3339         __be32 *p;
3340
3341         *res = 0;
3342         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3343                 return -EIO;
3344         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3345                 p = xdr_inline_decode(xdr, 4);
3346                 if (unlikely(!p))
3347                         goto out_overflow;
3348                 *res = be32_to_cpup(p);
3349                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3350         }
3351         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3352         return 0;
3353 out_overflow:
3354         print_overflow_msg(__func__, xdr);
3355         return -EIO;
3356 }
3357
3358 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3359 {
3360         __be32 *p;
3361         int ret = 0;
3362
3363         fsid->major = 0;
3364         fsid->minor = 0;
3365         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3366                 return -EIO;
3367         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3368                 p = xdr_inline_decode(xdr, 16);
3369                 if (unlikely(!p))
3370                         goto out_overflow;
3371                 p = xdr_decode_hyper(p, &fsid->major);
3372                 xdr_decode_hyper(p, &fsid->minor);
3373                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3374                 ret = NFS_ATTR_FATTR_FSID;
3375         }
3376         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3377                         (unsigned long long)fsid->major,
3378                         (unsigned long long)fsid->minor);
3379         return ret;
3380 out_overflow:
3381         print_overflow_msg(__func__, xdr);
3382         return -EIO;
3383 }
3384
3385 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3386 {
3387         __be32 *p;
3388
3389         *res = 60;
3390         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3391                 return -EIO;
3392         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3393                 p = xdr_inline_decode(xdr, 4);
3394                 if (unlikely(!p))
3395                         goto out_overflow;
3396                 *res = be32_to_cpup(p);
3397                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3398         }
3399         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3400         return 0;
3401 out_overflow:
3402         print_overflow_msg(__func__, xdr);
3403         return -EIO;
3404 }
3405
3406 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3407 {
3408         __be32 *p;
3409
3410         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3411                 return -EIO;
3412         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3413                 p = xdr_inline_decode(xdr, 4);
3414                 if (unlikely(!p))
3415                         goto out_overflow;
3416                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3417                 *res = -be32_to_cpup(p);
3418         }
3419         return 0;
3420 out_overflow:
3421         print_overflow_msg(__func__, xdr);
3422         return -EIO;
3423 }
3424
3425 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3426 {
3427         __be32 *p;
3428         int len;
3429
3430         if (fh != NULL)
3431                 memset(fh, 0, sizeof(*fh));
3432
3433         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3434                 return -EIO;
3435         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3436                 p = xdr_inline_decode(xdr, 4);
3437                 if (unlikely(!p))
3438                         goto out_overflow;
3439                 len = be32_to_cpup(p);
3440                 if (len > NFS4_FHSIZE)
3441                         return -EIO;
3442                 p = xdr_inline_decode(xdr, len);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 if (fh != NULL) {
3446                         memcpy(fh->data, p, len);
3447                         fh->size = len;
3448                 }
3449                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3450         }
3451         return 0;
3452 out_overflow:
3453         print_overflow_msg(__func__, xdr);
3454         return -EIO;
3455 }
3456
3457 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3458 {
3459         __be32 *p;
3460
3461         *res = 0;
3462         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3463                 return -EIO;
3464         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3465                 p = xdr_inline_decode(xdr, 4);
3466                 if (unlikely(!p))
3467                         goto out_overflow;
3468                 *res = be32_to_cpup(p);
3469                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3470         }
3471         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3472         return 0;
3473 out_overflow:
3474         print_overflow_msg(__func__, xdr);
3475         return -EIO;
3476 }
3477
3478 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480         __be32 *p;
3481         int ret = 0;
3482
3483         *fileid = 0;
3484         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3485                 return -EIO;
3486         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3487                 p = xdr_inline_decode(xdr, 8);
3488                 if (unlikely(!p))
3489                         goto out_overflow;
3490                 xdr_decode_hyper(p, fileid);
3491                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3492                 ret = NFS_ATTR_FATTR_FILEID;
3493         }
3494         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495         return ret;
3496 out_overflow:
3497         print_overflow_msg(__func__, xdr);
3498         return -EIO;
3499 }
3500
3501 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3502 {
3503         __be32 *p;
3504         int ret = 0;
3505
3506         *fileid = 0;
3507         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3510                 p = xdr_inline_decode(xdr, 8);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 xdr_decode_hyper(p, fileid);
3514                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3515                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3516         }
3517         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3518         return ret;
3519 out_overflow:
3520         print_overflow_msg(__func__, xdr);
3521         return -EIO;
3522 }
3523
3524 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3525 {
3526         __be32 *p;
3527         int status = 0;
3528
3529         *res = 0;
3530         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3531                 return -EIO;
3532         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3533                 p = xdr_inline_decode(xdr, 8);
3534                 if (unlikely(!p))
3535                         goto out_overflow;
3536                 xdr_decode_hyper(p, res);
3537                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3538         }
3539         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3540         return status;
3541 out_overflow:
3542         print_overflow_msg(__func__, xdr);
3543         return -EIO;
3544 }
3545
3546 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3547 {
3548         __be32 *p;
3549         int status = 0;
3550
3551         *res = 0;
3552         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3553                 return -EIO;
3554         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3555                 p = xdr_inline_decode(xdr, 8);
3556                 if (unlikely(!p))
3557                         goto out_overflow;
3558                 xdr_decode_hyper(p, res);
3559                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3560         }
3561         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3562         return status;
3563 out_overflow:
3564         print_overflow_msg(__func__, xdr);
3565         return -EIO;
3566 }
3567
3568 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3569 {
3570         __be32 *p;
3571         int status = 0;
3572
3573         *res = 0;
3574         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3575                 return -EIO;
3576         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3577                 p = xdr_inline_decode(xdr, 8);
3578                 if (unlikely(!p))
3579                         goto out_overflow;
3580                 xdr_decode_hyper(p, res);
3581                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3582         }
3583         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3584         return status;
3585 out_overflow:
3586         print_overflow_msg(__func__, xdr);
3587         return -EIO;
3588 }
3589
3590 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3591 {
3592         u32 n;
3593         __be32 *p;
3594         int status = 0;
3595
3596         p = xdr_inline_decode(xdr, 4);
3597         if (unlikely(!p))
3598                 goto out_overflow;
3599         n = be32_to_cpup(p);
3600         if (n == 0)
3601                 goto root_path;
3602         dprintk("pathname4: ");
3603         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3604                 dprintk("cannot parse %d components in path\n", n);
3605                 goto out_eio;
3606         }
3607         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3608                 struct nfs4_string *component = &path->components[path->ncomponents];
3609                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3610                 if (unlikely(status != 0))
3611                         goto out_eio;
3612                 ifdebug (XDR)
3613                         pr_cont("%s%.*s ",
3614                                 (path->ncomponents != n ? "/ " : ""),
3615                                 component->len, component->data);
3616         }
3617 out:
3618         return status;
3619 root_path:
3620 /* a root pathname is sent as a zero component4 */
3621         path->ncomponents = 1;
3622         path->components[0].len=0;
3623         path->components[0].data=NULL;
3624         dprintk("pathname4: /\n");
3625         goto out;
3626 out_eio:
3627         dprintk(" status %d", status);
3628         status = -EIO;
3629         goto out;
3630 out_overflow:
3631         print_overflow_msg(__func__, xdr);
3632         return -EIO;
3633 }
3634
3635 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3636 {
3637         int n;
3638         __be32 *p;
3639         int status = -EIO;
3640
3641         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3642                 goto out;
3643         status = 0;
3644         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3645                 goto out;
3646         status = -EIO;
3647         /* Ignore borken servers that return unrequested attrs */
3648         if (unlikely(res == NULL))
3649                 goto out;
3650         dprintk("%s: fsroot:\n", __func__);
3651         status = decode_pathname(xdr, &res->fs_path);
3652         if (unlikely(status != 0))
3653                 goto out;
3654         p = xdr_inline_decode(xdr, 4);
3655         if (unlikely(!p))
3656                 goto out_overflow;
3657         n = be32_to_cpup(p);
3658         if (n <= 0)
3659                 goto out_eio;
3660         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3661                 u32 m;
3662                 struct nfs4_fs_location *loc;
3663
3664                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3665                         break;
3666                 loc = &res->locations[res->nlocations];
3667                 p = xdr_inline_decode(xdr, 4);
3668                 if (unlikely(!p))
3669                         goto out_overflow;
3670                 m = be32_to_cpup(p);
3671
3672                 dprintk("%s: servers:\n", __func__);
3673                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3674                         struct nfs4_string *server;
3675
3676                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3677                                 unsigned int i;
3678                                 dprintk("%s: using first %u of %u servers "
3679                                         "returned for location %u\n",
3680                                                 __func__,
3681                                                 NFS4_FS_LOCATION_MAXSERVERS,
3682                                                 m, res->nlocations);
3683                                 for (i = loc->nservers; i < m; i++) {
3684                                         unsigned int len;
3685                                         char *data;
3686                                         status = decode_opaque_inline(xdr, &len, &data);
3687                                         if (unlikely(status != 0))
3688                                                 goto out_eio;
3689                                 }
3690                                 break;
3691                         }
3692                         server = &loc->servers[loc->nservers];
3693                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3694                         if (unlikely(status != 0))
3695                                 goto out_eio;
3696                         dprintk("%s ", server->data);
3697                 }
3698                 status = decode_pathname(xdr, &loc->rootpath);
3699                 if (unlikely(status != 0))
3700                         goto out_eio;
3701         }
3702         if (res->nlocations != 0)
3703                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3704 out:
3705         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3706         return status;
3707 out_overflow:
3708         print_overflow_msg(__func__, xdr);
3709 out_eio:
3710         status = -EIO;
3711         goto out;
3712 }
3713
3714 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3715 {
3716         __be32 *p;
3717         int status = 0;
3718
3719         *res = 0;
3720         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3721                 return -EIO;
3722         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3723                 p = xdr_inline_decode(xdr, 8);
3724                 if (unlikely(!p))
3725                         goto out_overflow;
3726                 xdr_decode_hyper(p, res);
3727                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3728         }
3729         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3730         return status;
3731 out_overflow:
3732         print_overflow_msg(__func__, xdr);
3733         return -EIO;
3734 }
3735
3736 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3737 {
3738         __be32 *p;
3739         int status = 0;
3740
3741         *maxlink = 1;
3742         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3743                 return -EIO;
3744         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3745                 p = xdr_inline_decode(xdr, 4);
3746                 if (unlikely(!p))
3747                         goto out_overflow;
3748                 *maxlink = be32_to_cpup(p);
3749                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3750         }
3751         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3752         return status;
3753 out_overflow:
3754         print_overflow_msg(__func__, xdr);
3755         return -EIO;
3756 }
3757
3758 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3759 {
3760         __be32 *p;
3761         int status = 0;
3762
3763         *maxname = 1024;
3764         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3765                 return -EIO;
3766         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3767                 p = xdr_inline_decode(xdr, 4);
3768                 if (unlikely(!p))
3769                         goto out_overflow;
3770                 *maxname = be32_to_cpup(p);
3771                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3772         }
3773         dprintk("%s: maxname=%u\n", __func__, *maxname);
3774         return status;
3775 out_overflow:
3776         print_overflow_msg(__func__, xdr);
3777         return -EIO;
3778 }
3779
3780 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3781 {
3782         __be32 *p;
3783         int status = 0;
3784
3785         *res = 1024;
3786         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3787                 return -EIO;
3788         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3789                 uint64_t maxread;
3790                 p = xdr_inline_decode(xdr, 8);
3791                 if (unlikely(!p))
3792                         goto out_overflow;
3793                 xdr_decode_hyper(p, &maxread);
3794                 if (maxread > 0x7FFFFFFF)
3795                         maxread = 0x7FFFFFFF;
3796                 *res = (uint32_t)maxread;
3797                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3798         }
3799         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3800         return status;
3801 out_overflow:
3802         print_overflow_msg(__func__, xdr);
3803         return -EIO;
3804 }
3805
3806 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3807 {
3808         __be32 *p;
3809         int status = 0;
3810
3811         *res = 1024;
3812         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3813                 return -EIO;
3814         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3815                 uint64_t maxwrite;
3816                 p = xdr_inline_decode(xdr, 8);
3817                 if (unlikely(!p))
3818                         goto out_overflow;
3819                 xdr_decode_hyper(p, &maxwrite);
3820                 if (maxwrite > 0x7FFFFFFF)
3821                         maxwrite = 0x7FFFFFFF;
3822                 *res = (uint32_t)maxwrite;
3823                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3824         }
3825         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3826         return status;
3827 out_overflow:
3828         print_overflow_msg(__func__, xdr);
3829         return -EIO;
3830 }
3831
3832 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3833 {
3834         uint32_t tmp;
3835         __be32 *p;
3836         int ret = 0;
3837
3838         *mode = 0;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3842                 p = xdr_inline_decode(xdr, 4);
3843                 if (unlikely(!p))
3844                         goto out_overflow;
3845                 tmp = be32_to_cpup(p);
3846                 *mode = tmp & ~S_IFMT;
3847                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3848                 ret = NFS_ATTR_FATTR_MODE;
3849         }
3850         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3851         return ret;
3852 out_overflow:
3853         print_overflow_msg(__func__, xdr);
3854         return -EIO;
3855 }
3856
3857 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3858 {
3859         __be32 *p;
3860         int ret = 0;
3861
3862         *nlink = 1;
3863         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3864                 return -EIO;
3865         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3866                 p = xdr_inline_decode(xdr, 4);
3867                 if (unlikely(!p))
3868                         goto out_overflow;
3869                 *nlink = be32_to_cpup(p);
3870                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3871                 ret = NFS_ATTR_FATTR_NLINK;
3872         }
3873         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3874         return ret;
3875 out_overflow:
3876         print_overflow_msg(__func__, xdr);
3877         return -EIO;
3878 }
3879
3880 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3881                 const struct nfs_server *server, kuid_t *uid,
3882                 struct nfs4_string *owner_name)
3883 {
3884         uint32_t len;
3885         __be32 *p;
3886         int ret = 0;
3887
3888         *uid = make_kuid(&init_user_ns, -2);
3889         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3890                 return -EIO;
3891         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3892                 p = xdr_inline_decode(xdr, 4);
3893                 if (unlikely(!p))
3894                         goto out_overflow;
3895                 len = be32_to_cpup(p);
3896                 p = xdr_inline_decode(xdr, len);
3897                 if (unlikely(!p))
3898                         goto out_overflow;
3899                 if (owner_name != NULL) {
3900                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3901                         if (owner_name->data != NULL) {
3902                                 owner_name->len = len;
3903                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3904                         }
3905                 } else if (len < XDR_MAX_NETOBJ) {
3906                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3907                                 ret = NFS_ATTR_FATTR_OWNER;
3908                         else
3909                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3910                                                 __func__);
3911                 } else
3912                         dprintk("%s: name too long (%u)!\n",
3913                                         __func__, len);
3914                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3915         }
3916         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917         return ret;
3918 out_overflow:
3919         print_overflow_msg(__func__, xdr);
3920         return -EIO;
3921 }
3922
3923 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3924                 const struct nfs_server *server, kgid_t *gid,
3925                 struct nfs4_string *group_name)
3926 {
3927         uint32_t len;
3928         __be32 *p;
3929         int ret = 0;
3930
3931         *gid = make_kgid(&init_user_ns, -2);
3932         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3933                 return -EIO;
3934         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3935                 p = xdr_inline_decode(xdr, 4);
3936                 if (unlikely(!p))
3937                         goto out_overflow;
3938                 len = be32_to_cpup(p);
3939                 p = xdr_inline_decode(xdr, len);
3940                 if (unlikely(!p))
3941                         goto out_overflow;
3942                 if (group_name != NULL) {
3943                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3944                         if (group_name->data != NULL) {
3945                                 group_name->len = len;
3946                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3947                         }
3948                 } else if (len < XDR_MAX_NETOBJ) {
3949                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3950                                 ret = NFS_ATTR_FATTR_GROUP;
3951                         else
3952                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3953                                                 __func__);
3954                 } else
3955                         dprintk("%s: name too long (%u)!\n",
3956                                         __func__, len);
3957                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3958         }
3959         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3960         return ret;
3961 out_overflow:
3962         print_overflow_msg(__func__, xdr);
3963         return -EIO;
3964 }
3965
3966 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3967 {
3968         uint32_t major = 0, minor = 0;
3969         __be32 *p;
3970         int ret = 0;
3971
3972         *rdev = MKDEV(0,0);
3973         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3974                 return -EIO;
3975         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3976                 dev_t tmp;
3977
3978                 p = xdr_inline_decode(xdr, 8);
3979                 if (unlikely(!p))
3980                         goto out_overflow;
3981                 major = be32_to_cpup(p++);
3982                 minor = be32_to_cpup(p);
3983                 tmp = MKDEV(major, minor);
3984                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3985                         *rdev = tmp;
3986                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3987                 ret = NFS_ATTR_FATTR_RDEV;
3988         }
3989         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3990         return ret;
3991 out_overflow:
3992         print_overflow_msg(__func__, xdr);
3993         return -EIO;
3994 }
3995
3996 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3997 {
3998         __be32 *p;
3999         int status = 0;
4000
4001         *res = 0;
4002         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4003                 return -EIO;
4004         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4005                 p = xdr_inline_decode(xdr, 8);
4006                 if (unlikely(!p))
4007                         goto out_overflow;
4008                 xdr_decode_hyper(p, res);
4009                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4010         }
4011         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4012         return status;
4013 out_overflow:
4014         print_overflow_msg(__func__, xdr);
4015         return -EIO;
4016 }
4017
4018 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4019 {
4020         __be32 *p;
4021         int status = 0;
4022
4023         *res = 0;
4024         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4025                 return -EIO;
4026         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4027                 p = xdr_inline_decode(xdr, 8);
4028                 if (unlikely(!p))
4029                         goto out_overflow;
4030                 xdr_decode_hyper(p, res);
4031                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4032         }
4033         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4034         return status;
4035 out_overflow:
4036         print_overflow_msg(__func__, xdr);
4037         return -EIO;
4038 }
4039
4040 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4041 {
4042         __be32 *p;
4043         int status = 0;
4044
4045         *res = 0;
4046         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4047                 return -EIO;
4048         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4049                 p = xdr_inline_decode(xdr, 8);
4050                 if (unlikely(!p))
4051                         goto out_overflow;
4052                 xdr_decode_hyper(p, res);
4053                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4054         }
4055         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4056         return status;
4057 out_overflow:
4058         print_overflow_msg(__func__, xdr);
4059         return -EIO;
4060 }
4061
4062 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4063 {
4064         __be32 *p;
4065         int ret = 0;
4066
4067         *used = 0;
4068         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4069                 return -EIO;
4070         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4071                 p = xdr_inline_decode(xdr, 8);
4072                 if (unlikely(!p))
4073                         goto out_overflow;
4074                 xdr_decode_hyper(p, used);
4075                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4076                 ret = NFS_ATTR_FATTR_SPACE_USED;
4077         }
4078         dprintk("%s: space used=%Lu\n", __func__,
4079                         (unsigned long long)*used);
4080         return ret;
4081 out_overflow:
4082         print_overflow_msg(__func__, xdr);
4083         return -EIO;
4084 }
4085
4086 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4087 {
4088         __be32 *p;
4089         uint64_t sec;
4090         uint32_t nsec;
4091
4092         p = xdr_inline_decode(xdr, 12);
4093         if (unlikely(!p))
4094                 goto out_overflow;
4095         p = xdr_decode_hyper(p, &sec);
4096         nsec = be32_to_cpup(p);
4097         time->tv_sec = (time_t)sec;
4098         time->tv_nsec = (long)nsec;
4099         return 0;
4100 out_overflow:
4101         print_overflow_msg(__func__, xdr);
4102         return -EIO;
4103 }
4104
4105 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4106 {
4107         int status = 0;
4108
4109         time->tv_sec = 0;
4110         time->tv_nsec = 0;
4111         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4112                 return -EIO;
4113         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4114                 status = decode_attr_time(xdr, time);
4115                 if (status == 0)
4116                         status = NFS_ATTR_FATTR_ATIME;
4117                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4118         }
4119         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4120         return status;
4121 }
4122
4123 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4124 {
4125         int status = 0;
4126
4127         time->tv_sec = 0;
4128         time->tv_nsec = 0;
4129         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4130                 return -EIO;
4131         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4132                 status = decode_attr_time(xdr, time);
4133                 if (status == 0)
4134                         status = NFS_ATTR_FATTR_CTIME;
4135                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4136         }
4137         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4138         return status;
4139 }
4140
4141 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4142                                   struct timespec *time)
4143 {
4144         int status = 0;
4145
4146         time->tv_sec = 0;
4147         time->tv_nsec = 0;
4148         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4149                 return -EIO;
4150         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4151                 status = decode_attr_time(xdr, time);
4152                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4153         }
4154         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4155                 (long)time->tv_nsec);
4156         return status;
4157 }
4158
4159 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4160                                         struct nfs4_label *label)
4161 {
4162         uint32_t pi = 0;
4163         uint32_t lfs = 0;
4164         __u32 len;
4165         __be32 *p;
4166         int status = 0;
4167
4168         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4169                 return -EIO;
4170         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4171                 p = xdr_inline_decode(xdr, 4);
4172                 if (unlikely(!p))
4173                         goto out_overflow;
4174                 lfs = be32_to_cpup(p++);
4175                 p = xdr_inline_decode(xdr, 4);
4176                 if (unlikely(!p))
4177                         goto out_overflow;
4178                 pi = be32_to_cpup(p++);
4179                 p = xdr_inline_decode(xdr, 4);
4180                 if (unlikely(!p))
4181                         goto out_overflow;
4182                 len = be32_to_cpup(p++);
4183                 p = xdr_inline_decode(xdr, len);
4184                 if (unlikely(!p))
4185                         goto out_overflow;
4186                 if (len < NFS4_MAXLABELLEN) {
4187                         if (label) {
4188                                 memcpy(label->label, p, len);
4189                                 label->len = len;
4190                                 label->pi = pi;
4191                                 label->lfs = lfs;
4192                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4193                         }
4194                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4195                 } else
4196                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4197                                         __func__, len);
4198         }
4199         if (label && label->label)
4200                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4201                         (char *)label->label, label->len, label->pi, label->lfs);
4202         return status;
4203
4204 out_overflow:
4205         print_overflow_msg(__func__, xdr);
4206         return -EIO;
4207 }
4208
4209 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4210 {
4211         int status = 0;
4212
4213         time->tv_sec = 0;
4214         time->tv_nsec = 0;
4215         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4216                 return -EIO;
4217         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4218                 status = decode_attr_time(xdr, time);
4219                 if (status == 0)
4220                         status = NFS_ATTR_FATTR_MTIME;
4221                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4222         }
4223         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4224         return status;
4225 }
4226
4227 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4228 {
4229         unsigned int attrwords = XDR_QUADLEN(attrlen);
4230         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4231
4232         if (unlikely(attrwords != nwords)) {
4233                 dprintk("%s: server returned incorrect attribute length: "
4234                         "%u %c %u\n",
4235                                 __func__,
4236                                 attrwords << 2,
4237                                 (attrwords < nwords) ? '<' : '>',
4238                                 nwords << 2);
4239                 return -EIO;
4240         }
4241         return 0;
4242 }
4243
4244 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4245 {
4246         __be32 *p;
4247
4248         p = xdr_inline_decode(xdr, 20);
4249         if (unlikely(!p))
4250                 goto out_overflow;
4251         cinfo->atomic = be32_to_cpup(p++);
4252         p = xdr_decode_hyper(p, &cinfo->before);
4253         xdr_decode_hyper(p, &cinfo->after);
4254         return 0;
4255 out_overflow:
4256         print_overflow_msg(__func__, xdr);
4257         return -EIO;
4258 }
4259
4260 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4261 {
4262         __be32 *p;
4263         uint32_t supp, acc;
4264         int status;
4265
4266         status = decode_op_hdr(xdr, OP_ACCESS);
4267         if (status)
4268                 return status;
4269         p = xdr_inline_decode(xdr, 8);
4270         if (unlikely(!p))
4271                 goto out_overflow;
4272         supp = be32_to_cpup(p++);
4273         acc = be32_to_cpup(p);
4274         *supported = supp;
4275         *access = acc;
4276         return 0;
4277 out_overflow:
4278         print_overflow_msg(__func__, xdr);
4279         return -EIO;
4280 }
4281
4282 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4283 {
4284         __be32 *p;
4285
4286         p = xdr_inline_decode(xdr, len);
4287         if (likely(p)) {
4288                 memcpy(buf, p, len);
4289                 return 0;
4290         }
4291         print_overflow_msg(__func__, xdr);
4292         return -EIO;
4293 }
4294
4295 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4296 {
4297         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4298 }
4299
4300 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4301 {
4302         int status;
4303
4304         status = decode_op_hdr(xdr, OP_CLOSE);
4305         if (status != -EIO)
4306                 nfs_increment_open_seqid(status, res->seqid);
4307         if (!status)
4308                 status = decode_stateid(xdr, &res->stateid);
4309         return status;
4310 }
4311
4312 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4313 {
4314         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4315 }
4316
4317 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4318 {
4319         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4320 }
4321
4322 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4323 {
4324         int status;
4325
4326         status = decode_op_hdr(xdr, OP_COMMIT);
4327         if (!status)
4328                 status = decode_write_verifier(xdr, &res->verf->verifier);
4329         return status;
4330 }
4331
4332 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4333 {
4334         __be32 *p;
4335         uint32_t bmlen;
4336         int status;
4337
4338         status = decode_op_hdr(xdr, OP_CREATE);
4339         if (status)
4340                 return status;
4341         if ((status = decode_change_info(xdr, cinfo)))
4342                 return status;
4343         p = xdr_inline_decode(xdr, 4);
4344         if (unlikely(!p))
4345                 goto out_overflow;
4346         bmlen = be32_to_cpup(p);
4347         p = xdr_inline_decode(xdr, bmlen << 2);
4348         if (likely(p))
4349                 return 0;
4350 out_overflow:
4351         print_overflow_msg(__func__, xdr);
4352         return -EIO;
4353 }
4354
4355 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4356 {
4357         unsigned int savep;
4358         uint32_t attrlen, bitmap[3] = {0};
4359         int status;
4360
4361         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4366                 goto xdr_error;
4367         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4368                 goto xdr_error;
4369         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4370                                                  &res->fh_expire_type)) != 0)
4371                 goto xdr_error;
4372         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4373                 goto xdr_error;
4374         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4375                 goto xdr_error;
4376         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4377                 goto xdr_error;
4378         status = verify_attr_len(xdr, savep, attrlen);
4379 xdr_error:
4380         dprintk("%s: xdr returned %d!\n", __func__, -status);
4381         return status;
4382 }
4383
4384 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4385 {
4386         unsigned int savep;
4387         uint32_t attrlen, bitmap[3] = {0};
4388         int status;
4389
4390         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4395                 goto xdr_error;
4396
4397         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4406                 goto xdr_error;
4407         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4408                 goto xdr_error;
4409
4410         status = verify_attr_len(xdr, savep, attrlen);
4411 xdr_error:
4412         dprintk("%s: xdr returned %d!\n", __func__, -status);
4413         return status;
4414 }
4415
4416 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4417 {
4418         unsigned int savep;
4419         uint32_t attrlen, bitmap[3] = {0};
4420         int status;
4421
4422         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4423                 goto xdr_error;
4424         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4425                 goto xdr_error;
4426         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4427                 goto xdr_error;
4428
4429         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4430                 goto xdr_error;
4431         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4432                 goto xdr_error;
4433
4434         status = verify_attr_len(xdr, savep, attrlen);
4435 xdr_error:
4436         dprintk("%s: xdr returned %d!\n", __func__, -status);
4437         return status;
4438 }
4439
4440 static int decode_threshold_hint(struct xdr_stream *xdr,
4441                                   uint32_t *bitmap,
4442                                   uint64_t *res,
4443                                   uint32_t hint_bit)
4444 {
4445         __be32 *p;
4446
4447         *res = 0;
4448         if (likely(bitmap[0] & hint_bit)) {
4449                 p = xdr_inline_decode(xdr, 8);
4450                 if (unlikely(!p))
4451                         goto out_overflow;
4452                 xdr_decode_hyper(p, res);
4453         }
4454         return 0;
4455 out_overflow:
4456         print_overflow_msg(__func__, xdr);
4457         return -EIO;
4458 }
4459
4460 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4461                                         struct nfs4_threshold *res)
4462 {
4463         __be32 *p;
4464         unsigned int savep;
4465         uint32_t bitmap[3] = {0,}, attrlen;
4466         int status;
4467
4468         /* layout type */
4469         p = xdr_inline_decode(xdr, 4);
4470         if (unlikely(!p)) {
4471                 print_overflow_msg(__func__, xdr);
4472                 return -EIO;
4473         }
4474         res->l_type = be32_to_cpup(p);
4475
4476         /* thi_hintset bitmap */
4477         status = decode_attr_bitmap(xdr, bitmap);
4478         if (status < 0)
4479                 goto xdr_error;
4480
4481         /* thi_hintlist length */
4482         status = decode_attr_length(xdr, &attrlen, &savep);
4483         if (status < 0)
4484                 goto xdr_error;
4485         /* thi_hintlist */
4486         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4487         if (status < 0)
4488                 goto xdr_error;
4489         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4490         if (status < 0)
4491                 goto xdr_error;
4492         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4493                                        THRESHOLD_RD_IO);
4494         if (status < 0)
4495                 goto xdr_error;
4496         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4497                                        THRESHOLD_WR_IO);
4498         if (status < 0)
4499                 goto xdr_error;
4500
4501         status = verify_attr_len(xdr, savep, attrlen);
4502         res->bm = bitmap[0];
4503
4504         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4505                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4506                 res->wr_io_sz);
4507 xdr_error:
4508         dprintk("%s ret=%d!\n", __func__, status);
4509         return status;
4510 }
4511
4512 /*
4513  * Thresholds on pNFS direct I/O vrs MDS I/O
4514  */
4515 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4516                                     uint32_t *bitmap,
4517                                     struct nfs4_threshold *res)
4518 {
4519         __be32 *p;
4520         int status = 0;
4521         uint32_t num;
4522
4523         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4524                 return -EIO;
4525         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4526                 /* Did the server return an unrequested attribute? */
4527                 if (unlikely(res == NULL))
4528                         return -EREMOTEIO;
4529                 p = xdr_inline_decode(xdr, 4);
4530                 if (unlikely(!p))
4531                         goto out_overflow;
4532                 num = be32_to_cpup(p);
4533                 if (num == 0)
4534                         return 0;
4535                 if (num > 1)
4536                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4537                                 "drivers per filesystem not supported\n",
4538                                 __func__);
4539
4540                 status = decode_first_threshold_item4(xdr, res);
4541                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4542         }
4543         return status;
4544 out_overflow:
4545         print_overflow_msg(__func__, xdr);
4546         return -EIO;
4547 }
4548
4549 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4550                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4551                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4552                 const struct nfs_server *server)
4553 {
4554         int status;
4555         umode_t fmode = 0;
4556         uint32_t type;
4557         int32_t err;
4558
4559         status = decode_attr_type(xdr, bitmap, &type);
4560         if (status < 0)
4561                 goto xdr_error;
4562         fattr->mode = 0;
4563         if (status != 0) {
4564                 fattr->mode |= nfs_type2fmt[type];
4565                 fattr->valid |= status;
4566         }
4567
4568         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_size(xdr, bitmap, &fattr->size);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4579         if (status < 0)
4580                 goto xdr_error;
4581         fattr->valid |= status;
4582
4583         err = 0;
4584         status = decode_attr_error(xdr, bitmap, &err);
4585         if (status < 0)
4586                 goto xdr_error;
4587
4588         status = decode_attr_filehandle(xdr, bitmap, fh);
4589         if (status < 0)
4590                 goto xdr_error;
4591
4592         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4593         if (status < 0)
4594                 goto xdr_error;
4595         fattr->valid |= status;
4596
4597         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4598         if (status < 0)
4599                 goto xdr_error;
4600         fattr->valid |= status;
4601
4602         status = decode_attr_mode(xdr, bitmap, &fmode);
4603         if (status < 0)
4604                 goto xdr_error;
4605         if (status != 0) {
4606                 fattr->mode |= fmode;
4607                 fattr->valid |= status;
4608         }
4609
4610         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4611         if (status < 0)
4612                 goto xdr_error;
4613         fattr->valid |= status;
4614
4615         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4621         if (status < 0)
4622                 goto xdr_error;
4623         fattr->valid |= status;
4624
4625         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4626         if (status < 0)
4627                 goto xdr_error;
4628         fattr->valid |= status;
4629
4630         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4631         if (status < 0)
4632                 goto xdr_error;
4633         fattr->valid |= status;
4634
4635         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4636         if (status < 0)
4637                 goto xdr_error;
4638         fattr->valid |= status;
4639
4640         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4641         if (status < 0)
4642                 goto xdr_error;
4643         fattr->valid |= status;
4644
4645         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4646         if (status < 0)
4647                 goto xdr_error;
4648         fattr->valid |= status;
4649
4650         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4651         if (status < 0)
4652                 goto xdr_error;
4653         fattr->valid |= status;
4654
4655         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4656         if (status < 0)
4657                 goto xdr_error;
4658
4659         if (label) {
4660                 status = decode_attr_security_label(xdr, bitmap, label);
4661                 if (status < 0)
4662                         goto xdr_error;
4663                 fattr->valid |= status;
4664         }
4665
4666 xdr_error:
4667         dprintk("%s: xdr returned %d\n", __func__, -status);
4668         return status;
4669 }
4670
4671 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4672                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4673                 struct nfs4_label *label, const struct nfs_server *server)
4674 {
4675         unsigned int savep;
4676         uint32_t attrlen,
4677                  bitmap[3] = {0};
4678         int status;
4679
4680         status = decode_op_hdr(xdr, OP_GETATTR);
4681         if (status < 0)
4682                 goto xdr_error;
4683
4684         status = decode_attr_bitmap(xdr, bitmap);
4685         if (status < 0)
4686                 goto xdr_error;
4687
4688         status = decode_attr_length(xdr, &attrlen, &savep);
4689         if (status < 0)
4690                 goto xdr_error;
4691
4692         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4693                                         label, server);
4694         if (status < 0)
4695                 goto xdr_error;
4696
4697         status = verify_attr_len(xdr, savep, attrlen);
4698 xdr_error:
4699         dprintk("%s: xdr returned %d\n", __func__, -status);
4700         return status;
4701 }
4702
4703 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4704                 struct nfs4_label *label, const struct nfs_server *server)
4705 {
4706         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4707 }
4708
4709 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4710                 const struct nfs_server *server)
4711 {
4712         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4713 }
4714
4715 /*
4716  * Decode potentially multiple layout types. Currently we only support
4717  * one layout driver per file system.
4718  */
4719 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4720                                          uint32_t *layouttype)
4721 {
4722         __be32 *p;
4723         int num;
4724
4725         p = xdr_inline_decode(xdr, 4);
4726         if (unlikely(!p))
4727                 goto out_overflow;
4728         num = be32_to_cpup(p);
4729
4730         /* pNFS is not supported by the underlying file system */
4731         if (num == 0) {
4732                 *layouttype = 0;
4733                 return 0;
4734         }
4735         if (num > 1)
4736                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4737                         "drivers per filesystem not supported\n", __func__);
4738
4739         /* Decode and set first layout type, move xdr->p past unused types */
4740         p = xdr_inline_decode(xdr, num * 4);
4741         if (unlikely(!p))
4742                 goto out_overflow;
4743         *layouttype = be32_to_cpup(p);
4744         return 0;
4745 out_overflow:
4746         print_overflow_msg(__func__, xdr);
4747         return -EIO;
4748 }
4749
4750 /*
4751  * The type of file system exported.
4752  * Note we must ensure that layouttype is set in any non-error case.
4753  */
4754 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4755                                 uint32_t *layouttype)
4756 {
4757         int status = 0;
4758
4759         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4760         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4761                 return -EIO;
4762         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4763                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4764                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4765         } else
4766                 *layouttype = 0;
4767         return status;
4768 }
4769
4770 /*
4771  * The prefered block size for layout directed io
4772  */
4773 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4774                                       uint32_t *res)
4775 {
4776         __be32 *p;
4777
4778         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4779         *res = 0;
4780         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4781                 p = xdr_inline_decode(xdr, 4);
4782                 if (unlikely(!p)) {
4783                         print_overflow_msg(__func__, xdr);
4784                         return -EIO;
4785                 }
4786                 *res = be32_to_cpup(p);
4787                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4788         }
4789         return 0;
4790 }
4791
4792 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4793 {
4794         unsigned int savep;
4795         uint32_t attrlen, bitmap[3];
4796         int status;
4797
4798         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4799                 goto xdr_error;
4800         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4801                 goto xdr_error;
4802         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4803                 goto xdr_error;
4804
4805         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4806
4807         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4808                 goto xdr_error;
4809         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4810                 goto xdr_error;
4811         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4812                 goto xdr_error;
4813         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4814         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4815                 goto xdr_error;
4816         fsinfo->wtpref = fsinfo->wtmax;
4817         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4818         if (status != 0)
4819                 goto xdr_error;
4820         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4821         if (status != 0)
4822                 goto xdr_error;
4823         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4824         if (status)
4825                 goto xdr_error;
4826
4827         status = verify_attr_len(xdr, savep, attrlen);
4828 xdr_error:
4829         dprintk("%s: xdr returned %d!\n", __func__, -status);
4830         return status;
4831 }
4832
4833 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4834 {
4835         __be32 *p;
4836         uint32_t len;
4837         int status;
4838
4839         /* Zero handle first to allow comparisons */
4840         memset(fh, 0, sizeof(*fh));
4841
4842         status = decode_op_hdr(xdr, OP_GETFH);
4843         if (status)
4844                 return status;
4845
4846         p = xdr_inline_decode(xdr, 4);
4847         if (unlikely(!p))
4848                 goto out_overflow;
4849         len = be32_to_cpup(p);
4850         if (len > NFS4_FHSIZE)
4851                 return -EIO;
4852         fh->size = len;
4853         p = xdr_inline_decode(xdr, len);
4854         if (unlikely(!p))
4855                 goto out_overflow;
4856         memcpy(fh->data, p, len);
4857         return 0;
4858 out_overflow:
4859         print_overflow_msg(__func__, xdr);
4860         return -EIO;
4861 }
4862
4863 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4864 {
4865         int status;
4866
4867         status = decode_op_hdr(xdr, OP_LINK);
4868         if (status)
4869                 return status;
4870         return decode_change_info(xdr, cinfo);
4871 }
4872
4873 /*
4874  * We create the owner, so we know a proper owner.id length is 4.
4875  */
4876 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4877 {
4878         uint64_t offset, length, clientid;
4879         __be32 *p;
4880         uint32_t namelen, type;
4881
4882         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4883         if (unlikely(!p))
4884                 goto out_overflow;
4885         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4886         p = xdr_decode_hyper(p, &length);
4887         type = be32_to_cpup(p++); /* 4 byte read */
4888         if (fl != NULL) { /* manipulate file lock */
4889                 fl->fl_start = (loff_t)offset;
4890                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4891                 if (length == ~(uint64_t)0)
4892                         fl->fl_end = OFFSET_MAX;
4893                 fl->fl_type = F_WRLCK;
4894                 if (type & 1)
4895                         fl->fl_type = F_RDLCK;
4896                 fl->fl_pid = 0;
4897         }
4898         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4899         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4900         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4901         if (likely(p))
4902                 return -NFS4ERR_DENIED;
4903 out_overflow:
4904         print_overflow_msg(__func__, xdr);
4905         return -EIO;
4906 }
4907
4908 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4909 {
4910         int status;
4911
4912         status = decode_op_hdr(xdr, OP_LOCK);
4913         if (status == -EIO)
4914                 goto out;
4915         if (status == 0) {
4916                 status = decode_stateid(xdr, &res->stateid);
4917                 if (unlikely(status))
4918                         goto out;
4919         } else if (status == -NFS4ERR_DENIED)
4920                 status = decode_lock_denied(xdr, NULL);
4921         if (res->open_seqid != NULL)
4922                 nfs_increment_open_seqid(status, res->open_seqid);
4923         nfs_increment_lock_seqid(status, res->lock_seqid);
4924 out:
4925         return status;
4926 }
4927
4928 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4929 {
4930         int status;
4931         status = decode_op_hdr(xdr, OP_LOCKT);
4932         if (status == -NFS4ERR_DENIED)
4933                 return decode_lock_denied(xdr, res->denied);
4934         return status;
4935 }
4936
4937 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4938 {
4939         int status;
4940
4941         status = decode_op_hdr(xdr, OP_LOCKU);
4942         if (status != -EIO)
4943                 nfs_increment_lock_seqid(status, res->seqid);
4944         if (status == 0)
4945                 status = decode_stateid(xdr, &res->stateid);
4946         return status;
4947 }
4948
4949 static int decode_release_lockowner(struct xdr_stream *xdr)
4950 {
4951         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4952 }
4953
4954 static int decode_lookup(struct xdr_stream *xdr)
4955 {
4956         return decode_op_hdr(xdr, OP_LOOKUP);
4957 }
4958
4959 /* This is too sick! */
4960 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4961 {
4962         __be32 *p;
4963         uint32_t limit_type, nblocks, blocksize;
4964
4965         p = xdr_inline_decode(xdr, 12);
4966         if (unlikely(!p))
4967                 goto out_overflow;
4968         limit_type = be32_to_cpup(p++);
4969         switch (limit_type) {
4970         case 1:
4971                 xdr_decode_hyper(p, maxsize);
4972                 break;
4973         case 2:
4974                 nblocks = be32_to_cpup(p++);
4975                 blocksize = be32_to_cpup(p);
4976                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4977         }
4978         return 0;
4979 out_overflow:
4980         print_overflow_msg(__func__, xdr);
4981         return -EIO;
4982 }
4983
4984 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4985 {
4986         __be32 *p;
4987         uint32_t delegation_type;
4988         int status;
4989
4990         p = xdr_inline_decode(xdr, 4);
4991         if (unlikely(!p))
4992                 goto out_overflow;
4993         delegation_type = be32_to_cpup(p);
4994         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4995                 res->delegation_type = 0;
4996                 return 0;
4997         }
4998         status = decode_stateid(xdr, &res->delegation);
4999         if (unlikely(status))
5000                 return status;
5001         p = xdr_inline_decode(xdr, 4);
5002         if (unlikely(!p))
5003                 goto out_overflow;
5004         res->do_recall = be32_to_cpup(p);
5005
5006         switch (delegation_type) {
5007         case NFS4_OPEN_DELEGATE_READ:
5008                 res->delegation_type = FMODE_READ;
5009                 break;
5010         case NFS4_OPEN_DELEGATE_WRITE:
5011                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5012                 if (decode_space_limit(xdr, &res->maxsize) < 0)
5013                                 return -EIO;
5014         }
5015         return decode_ace(xdr, NULL, res->server->nfs_client);
5016 out_overflow:
5017         print_overflow_msg(__func__, xdr);
5018         return -EIO;
5019 }
5020
5021 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5022 {
5023         __be32 *p;
5024         uint32_t savewords, bmlen, i;
5025         int status;
5026
5027         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5028                 return status;
5029         nfs_increment_open_seqid(status, res->seqid);
5030         if (status)
5031                 return status;
5032         status = decode_stateid(xdr, &res->stateid);
5033         if (unlikely(status))
5034                 return status;
5035
5036         decode_change_info(xdr, &res->cinfo);
5037
5038         p = xdr_inline_decode(xdr, 8);
5039         if (unlikely(!p))
5040                 goto out_overflow;
5041         res->rflags = be32_to_cpup(p++);
5042         bmlen = be32_to_cpup(p);
5043         if (bmlen > 10)
5044                 goto xdr_error;
5045
5046         p = xdr_inline_decode(xdr, bmlen << 2);
5047         if (unlikely(!p))
5048                 goto out_overflow;
5049         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5050         for (i = 0; i < savewords; ++i)
5051                 res->attrset[i] = be32_to_cpup(p++);
5052         for (; i < NFS4_BITMAP_SIZE; i++)
5053                 res->attrset[i] = 0;
5054
5055         return decode_delegation(xdr, res);
5056 xdr_error:
5057         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5058         return -EIO;
5059 out_overflow:
5060         print_overflow_msg(__func__, xdr);
5061         return -EIO;
5062 }
5063
5064 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5065 {
5066         int status;
5067
5068         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5069         if (status != -EIO)
5070                 nfs_increment_open_seqid(status, res->seqid);
5071         if (!status)
5072                 status = decode_stateid(xdr, &res->stateid);
5073         return status;
5074 }
5075
5076 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5077 {
5078         int status;
5079
5080         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5081         if (status != -EIO)
5082                 nfs_increment_open_seqid(status, res->seqid);
5083         if (!status)
5084                 status = decode_stateid(xdr, &res->stateid);
5085         return status;
5086 }
5087
5088 static int decode_putfh(struct xdr_stream *xdr)
5089 {
5090         return decode_op_hdr(xdr, OP_PUTFH);
5091 }
5092
5093 static int decode_putrootfh(struct xdr_stream *xdr)
5094 {
5095         return decode_op_hdr(xdr, OP_PUTROOTFH);
5096 }
5097
5098 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5099                        struct nfs_pgio_res *res)
5100 {
5101         __be32 *p;
5102         uint32_t count, eof, recvd;
5103         int status;
5104
5105         status = decode_op_hdr(xdr, OP_READ);
5106         if (status)
5107                 return status;
5108         p = xdr_inline_decode(xdr, 8);
5109         if (unlikely(!p))
5110                 goto out_overflow;
5111         eof = be32_to_cpup(p++);
5112         count = be32_to_cpup(p);
5113         recvd = xdr_read_pages(xdr, count);
5114         if (count > recvd) {
5115                 dprintk("NFS: server cheating in read reply: "
5116                                 "count %u > recvd %u\n", count, recvd);
5117                 count = recvd;
5118                 eof = 0;
5119         }
5120         res->eof = eof;
5121         res->count = count;
5122         return 0;
5123 out_overflow:
5124         print_overflow_msg(__func__, xdr);
5125         return -EIO;
5126 }
5127
5128 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5129 {
5130         int             status;
5131         __be32          verf[2];
5132
5133         status = decode_op_hdr(xdr, OP_READDIR);
5134         if (!status)
5135                 status = decode_verifier(xdr, readdir->verifier.data);
5136         if (unlikely(status))
5137                 return status;
5138         memcpy(verf, readdir->verifier.data, sizeof(verf));
5139         dprintk("%s: verifier = %08x:%08x\n",
5140                         __func__, verf[0], verf[1]);
5141         return xdr_read_pages(xdr, xdr->buf->page_len);
5142 }
5143
5144 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5145 {
5146         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5147         u32 len, recvd;
5148         __be32 *p;
5149         int status;
5150
5151         status = decode_op_hdr(xdr, OP_READLINK);
5152         if (status)
5153                 return status;
5154
5155         /* Convert length of symlink */
5156         p = xdr_inline_decode(xdr, 4);
5157         if (unlikely(!p))
5158                 goto out_overflow;
5159         len = be32_to_cpup(p);
5160         if (len >= rcvbuf->page_len || len <= 0) {
5161                 dprintk("nfs: server returned giant symlink!\n");
5162                 return -ENAMETOOLONG;
5163         }
5164         recvd = xdr_read_pages(xdr, len);
5165         if (recvd < len) {
5166                 dprintk("NFS: server cheating in readlink reply: "
5167                                 "count %u > recvd %u\n", len, recvd);
5168                 return -EIO;
5169         }
5170         /*
5171          * The XDR encode routine has set things up so that
5172          * the link text will be copied directly into the
5173          * buffer.  We just have to do overflow-checking,
5174          * and and null-terminate the text (the VFS expects
5175          * null-termination).
5176          */
5177         xdr_terminate_string(rcvbuf, len);
5178         return 0;
5179 out_overflow:
5180         print_overflow_msg(__func__, xdr);
5181         return -EIO;
5182 }
5183
5184 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5185 {
5186         int status;
5187
5188         status = decode_op_hdr(xdr, OP_REMOVE);
5189         if (status)
5190                 goto out;
5191         status = decode_change_info(xdr, cinfo);
5192 out:
5193         return status;
5194 }
5195
5196 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5197               struct nfs4_change_info *new_cinfo)
5198 {
5199         int status;
5200
5201         status = decode_op_hdr(xdr, OP_RENAME);
5202         if (status)
5203                 goto out;
5204         if ((status = decode_change_info(xdr, old_cinfo)))
5205                 goto out;
5206         status = decode_change_info(xdr, new_cinfo);
5207 out:
5208         return status;
5209 }
5210
5211 static int decode_renew(struct xdr_stream *xdr)
5212 {
5213         return decode_op_hdr(xdr, OP_RENEW);
5214 }
5215
5216 static int
5217 decode_restorefh(struct xdr_stream *xdr)
5218 {
5219         return decode_op_hdr(xdr, OP_RESTOREFH);
5220 }
5221
5222 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5223                          struct nfs_getaclres *res)
5224 {
5225         unsigned int savep;
5226         uint32_t attrlen,
5227                  bitmap[3] = {0};
5228         int status;
5229         unsigned int pg_offset;
5230
5231         res->acl_len = 0;
5232         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5233                 goto out;
5234
5235         xdr_enter_page(xdr, xdr->buf->page_len);
5236
5237         /* Calculate the offset of the page data */
5238         pg_offset = xdr->buf->head[0].iov_len;
5239
5240         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5241                 goto out;
5242         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5243                 goto out;
5244
5245         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5246                 return -EIO;
5247         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5248
5249                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5250                  * are stored with the acl data to handle the problem of
5251                  * variable length bitmaps.*/
5252                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5253                 res->acl_len = attrlen;
5254
5255                 /* Check for receive buffer overflow */
5256                 if (res->acl_len > (xdr->nwords << 2) ||
5257                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5258                         res->acl_flags |= NFS4_ACL_TRUNC;
5259                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5260                                         attrlen, xdr->nwords << 2);
5261                 }
5262         } else
5263                 status = -EOPNOTSUPP;
5264
5265 out:
5266         return status;
5267 }
5268
5269 static int
5270 decode_savefh(struct xdr_stream *xdr)
5271 {
5272         return decode_op_hdr(xdr, OP_SAVEFH);
5273 }
5274
5275 static int decode_setattr(struct xdr_stream *xdr)
5276 {
5277         __be32 *p;
5278         uint32_t bmlen;
5279         int status;
5280
5281         status = decode_op_hdr(xdr, OP_SETATTR);
5282         if (status)
5283                 return status;
5284         p = xdr_inline_decode(xdr, 4);
5285         if (unlikely(!p))
5286                 goto out_overflow;
5287         bmlen = be32_to_cpup(p);
5288         p = xdr_inline_decode(xdr, bmlen << 2);
5289         if (likely(p))
5290                 return 0;
5291 out_overflow:
5292         print_overflow_msg(__func__, xdr);
5293         return -EIO;
5294 }
5295
5296 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5297 {
5298         __be32 *p;
5299         uint32_t opnum;
5300         int32_t nfserr;
5301
5302         p = xdr_inline_decode(xdr, 8);
5303         if (unlikely(!p))
5304                 goto out_overflow;
5305         opnum = be32_to_cpup(p++);
5306         if (opnum != OP_SETCLIENTID) {
5307                 dprintk("nfs: decode_setclientid: Server returned operation"
5308                         " %d\n", opnum);
5309                 return -EIO;
5310         }
5311         nfserr = be32_to_cpup(p);
5312         if (nfserr == NFS_OK) {
5313                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5314                 if (unlikely(!p))
5315                         goto out_overflow;
5316                 p = xdr_decode_hyper(p, &res->clientid);
5317                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5318         } else if (nfserr == NFSERR_CLID_INUSE) {
5319                 uint32_t len;
5320
5321                 /* skip netid string */
5322                 p = xdr_inline_decode(xdr, 4);
5323                 if (unlikely(!p))
5324                         goto out_overflow;
5325                 len = be32_to_cpup(p);
5326                 p = xdr_inline_decode(xdr, len);
5327                 if (unlikely(!p))
5328                         goto out_overflow;
5329
5330                 /* skip uaddr string */
5331                 p = xdr_inline_decode(xdr, 4);
5332                 if (unlikely(!p))
5333                         goto out_overflow;
5334                 len = be32_to_cpup(p);
5335                 p = xdr_inline_decode(xdr, len);
5336                 if (unlikely(!p))
5337                         goto out_overflow;
5338                 return -NFSERR_CLID_INUSE;
5339         } else
5340                 return nfs4_stat_to_errno(nfserr);
5341
5342         return 0;
5343 out_overflow:
5344         print_overflow_msg(__func__, xdr);
5345         return -EIO;
5346 }
5347
5348 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5349 {
5350         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5351 }
5352
5353 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5354 {
5355         __be32 *p;
5356         int status;
5357
5358         status = decode_op_hdr(xdr, OP_WRITE);
5359         if (status)
5360                 return status;
5361
5362         p = xdr_inline_decode(xdr, 8);
5363         if (unlikely(!p))
5364                 goto out_overflow;
5365         res->count = be32_to_cpup(p++);
5366         res->verf->committed = be32_to_cpup(p++);
5367         return decode_write_verifier(xdr, &res->verf->verifier);
5368 out_overflow:
5369         print_overflow_msg(__func__, xdr);
5370         return -EIO;
5371 }
5372
5373 static int decode_delegreturn(struct xdr_stream *xdr)
5374 {
5375         return decode_op_hdr(xdr, OP_DELEGRETURN);
5376 }
5377
5378 static int decode_secinfo_gss(struct xdr_stream *xdr,
5379                               struct nfs4_secinfo4 *flavor)
5380 {
5381         u32 oid_len;
5382         __be32 *p;
5383
5384         p = xdr_inline_decode(xdr, 4);
5385         if (unlikely(!p))
5386                 goto out_overflow;
5387         oid_len = be32_to_cpup(p);
5388         if (oid_len > GSS_OID_MAX_LEN)
5389                 goto out_err;
5390
5391         p = xdr_inline_decode(xdr, oid_len);
5392         if (unlikely(!p))
5393                 goto out_overflow;
5394         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5395         flavor->flavor_info.oid.len = oid_len;
5396
5397         p = xdr_inline_decode(xdr, 8);
5398         if (unlikely(!p))
5399                 goto out_overflow;
5400         flavor->flavor_info.qop = be32_to_cpup(p++);
5401         flavor->flavor_info.service = be32_to_cpup(p);
5402
5403         return 0;
5404
5405 out_overflow:
5406         print_overflow_msg(__func__, xdr);
5407         return -EIO;
5408 out_err:
5409         return -EINVAL;
5410 }
5411
5412 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5413 {
5414         struct nfs4_secinfo4 *sec_flavor;
5415         unsigned int i, num_flavors;
5416         int status;
5417         __be32 *p;
5418
5419         p = xdr_inline_decode(xdr, 4);
5420         if (unlikely(!p))
5421                 goto out_overflow;
5422
5423         res->flavors->num_flavors = 0;
5424         num_flavors = be32_to_cpup(p);
5425
5426         for (i = 0; i < num_flavors; i++) {
5427                 sec_flavor = &res->flavors->flavors[i];
5428                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5429                         break;
5430
5431                 p = xdr_inline_decode(xdr, 4);
5432                 if (unlikely(!p))
5433                         goto out_overflow;
5434                 sec_flavor->flavor = be32_to_cpup(p);
5435
5436                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5437                         status = decode_secinfo_gss(xdr, sec_flavor);
5438                         if (status)
5439                                 goto out;
5440                 }
5441                 res->flavors->num_flavors++;
5442         }
5443
5444         status = 0;
5445 out:
5446         return status;
5447 out_overflow:
5448         print_overflow_msg(__func__, xdr);
5449         return -EIO;
5450 }
5451
5452 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5453 {
5454         int status = decode_op_hdr(xdr, OP_SECINFO);
5455         if (status)
5456                 return status;
5457         return decode_secinfo_common(xdr, res);
5458 }
5459
5460 #if defined(CONFIG_NFS_V4_1)
5461 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5462 {
5463         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5464         if (status)
5465                 return status;
5466         return decode_secinfo_common(xdr, res);
5467 }
5468
5469 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5470 {
5471         __be32 *p;
5472         uint32_t bitmap_words;
5473         unsigned int i;
5474
5475         p = xdr_inline_decode(xdr, 4);
5476         bitmap_words = be32_to_cpup(p++);
5477         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5478                 return -EIO;
5479         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5480         for (i = 0; i < bitmap_words; i++)
5481                 op_map->u.words[i] = be32_to_cpup(p++);
5482
5483         return 0;
5484 }
5485
5486 static int decode_exchange_id(struct xdr_stream *xdr,
5487                               struct nfs41_exchange_id_res *res)
5488 {
5489         __be32 *p;
5490         uint32_t dummy;
5491         char *dummy_str;
5492         int status;
5493         uint32_t impl_id_count;
5494
5495         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5496         if (status)
5497                 return status;
5498
5499         p = xdr_inline_decode(xdr, 8);
5500         if (unlikely(!p))
5501                 goto out_overflow;
5502         xdr_decode_hyper(p, &res->clientid);
5503         p = xdr_inline_decode(xdr, 12);
5504         if (unlikely(!p))
5505                 goto out_overflow;
5506         res->seqid = be32_to_cpup(p++);
5507         res->flags = be32_to_cpup(p++);
5508
5509         res->state_protect.how = be32_to_cpup(p);
5510         switch (res->state_protect.how) {
5511         case SP4_NONE:
5512                 break;
5513         case SP4_MACH_CRED:
5514                 status = decode_op_map(xdr, &res->state_protect.enforce);
5515                 if (status)
5516                         return status;
5517                 status = decode_op_map(xdr, &res->state_protect.allow);
5518                 if (status)
5519                         return status;
5520                 break;
5521         default:
5522                 WARN_ON_ONCE(1);
5523                 return -EIO;
5524         }
5525
5526         /* server_owner4.so_minor_id */
5527         p = xdr_inline_decode(xdr, 8);
5528         if (unlikely(!p))
5529                 goto out_overflow;
5530         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5531
5532         /* server_owner4.so_major_id */
5533         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5534         if (unlikely(status))
5535                 return status;
5536         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5537                 return -EIO;
5538         memcpy(res->server_owner->major_id, dummy_str, dummy);
5539         res->server_owner->major_id_sz = dummy;
5540
5541         /* server_scope4 */
5542         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5543         if (unlikely(status))
5544                 return status;
5545         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5546                 return -EIO;
5547         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5548         res->server_scope->server_scope_sz = dummy;
5549
5550         /* Implementation Id */
5551         p = xdr_inline_decode(xdr, 4);
5552         if (unlikely(!p))
5553                 goto out_overflow;
5554         impl_id_count = be32_to_cpup(p++);
5555
5556         if (impl_id_count) {
5557                 /* nii_domain */
5558                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5559                 if (unlikely(status))
5560                         return status;
5561                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5562                         return -EIO;
5563                 memcpy(res->impl_id->domain, dummy_str, dummy);
5564
5565                 /* nii_name */
5566                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5567                 if (unlikely(status))
5568                         return status;
5569                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5570                         return -EIO;
5571                 memcpy(res->impl_id->name, dummy_str, dummy);
5572
5573                 /* nii_date */
5574                 p = xdr_inline_decode(xdr, 12);
5575                 if (unlikely(!p))
5576                         goto out_overflow;
5577                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5578                 res->impl_id->date.nseconds = be32_to_cpup(p);
5579
5580                 /* if there's more than one entry, ignore the rest */
5581         }
5582         return 0;
5583 out_overflow:
5584         print_overflow_msg(__func__, xdr);
5585         return -EIO;
5586 }
5587
5588 static int decode_chan_attrs(struct xdr_stream *xdr,
5589                              struct nfs4_channel_attrs *attrs)
5590 {
5591         __be32 *p;
5592         u32 nr_attrs, val;
5593
5594         p = xdr_inline_decode(xdr, 28);
5595         if (unlikely(!p))
5596                 goto out_overflow;
5597         val = be32_to_cpup(p++);        /* headerpadsz */
5598         if (val)
5599                 return -EINVAL;         /* no support for header padding yet */
5600         attrs->max_rqst_sz = be32_to_cpup(p++);
5601         attrs->max_resp_sz = be32_to_cpup(p++);
5602         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5603         attrs->max_ops = be32_to_cpup(p++);
5604         attrs->max_reqs = be32_to_cpup(p++);
5605         nr_attrs = be32_to_cpup(p);
5606         if (unlikely(nr_attrs > 1)) {
5607                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5608                         "count %u\n", __func__, nr_attrs);
5609                 return -EINVAL;
5610         }
5611         if (nr_attrs == 1) {
5612                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5613                 if (unlikely(!p))
5614                         goto out_overflow;
5615         }
5616         return 0;
5617 out_overflow:
5618         print_overflow_msg(__func__, xdr);
5619         return -EIO;
5620 }
5621
5622 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5623 {
5624         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5625 }
5626
5627 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5628                                 struct nfs41_bind_conn_to_session_res *res)
5629 {
5630         __be32 *p;
5631         int status;
5632
5633         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5634         if (!status)
5635                 status = decode_sessionid(xdr, &res->session->sess_id);
5636         if (unlikely(status))
5637                 return status;
5638
5639         /* dir flags, rdma mode bool */
5640         p = xdr_inline_decode(xdr, 8);
5641         if (unlikely(!p))
5642                 goto out_overflow;
5643
5644         res->dir = be32_to_cpup(p++);
5645         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5646                 return -EIO;
5647         if (be32_to_cpup(p) == 0)
5648                 res->use_conn_in_rdma_mode = false;
5649         else
5650                 res->use_conn_in_rdma_mode = true;
5651
5652         return 0;
5653 out_overflow:
5654         print_overflow_msg(__func__, xdr);
5655         return -EIO;
5656 }
5657
5658 static int decode_create_session(struct xdr_stream *xdr,
5659                                  struct nfs41_create_session_res *res)
5660 {
5661         __be32 *p;
5662         int status;
5663         struct nfs_client *clp = res->client;
5664         struct nfs4_session *session = clp->cl_session;
5665
5666         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5667         if (!status)
5668                 status = decode_sessionid(xdr, &session->sess_id);
5669         if (unlikely(status))
5670                 return status;
5671
5672         /* seqid, flags */
5673         p = xdr_inline_decode(xdr, 8);
5674         if (unlikely(!p))
5675                 goto out_overflow;
5676         clp->cl_seqid = be32_to_cpup(p++);
5677         session->flags = be32_to_cpup(p);
5678
5679         /* Channel attributes */
5680         status = decode_chan_attrs(xdr, &session->fc_attrs);
5681         if (!status)
5682                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5683         return status;
5684 out_overflow:
5685         print_overflow_msg(__func__, xdr);
5686         return -EIO;
5687 }
5688
5689 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5690 {
5691         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5692 }
5693
5694 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5695 {
5696         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5697 }
5698
5699 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5700 {
5701         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5702 }
5703 #endif /* CONFIG_NFS_V4_1 */
5704
5705 static int decode_sequence(struct xdr_stream *xdr,
5706                            struct nfs4_sequence_res *res,
5707                            struct rpc_rqst *rqstp)
5708 {
5709 #if defined(CONFIG_NFS_V4_1)
5710         struct nfs4_session *session;
5711         struct nfs4_sessionid id;
5712         u32 dummy;
5713         int status;
5714         __be32 *p;
5715
5716         if (res->sr_slot == NULL)
5717                 return 0;
5718         if (!res->sr_slot->table->session)
5719                 return 0;
5720
5721         status = decode_op_hdr(xdr, OP_SEQUENCE);
5722         if (!status)
5723                 status = decode_sessionid(xdr, &id);
5724         if (unlikely(status))
5725                 goto out_err;
5726
5727         /*
5728          * If the server returns different values for sessionID, slotID or
5729          * sequence number, the server is looney tunes.
5730          */
5731         status = -EREMOTEIO;
5732         session = res->sr_slot->table->session;
5733
5734         if (memcmp(id.data, session->sess_id.data,
5735                    NFS4_MAX_SESSIONID_LEN)) {
5736                 dprintk("%s Invalid session id\n", __func__);
5737                 goto out_err;
5738         }
5739
5740         p = xdr_inline_decode(xdr, 20);
5741         if (unlikely(!p))
5742                 goto out_overflow;
5743
5744         /* seqid */
5745         dummy = be32_to_cpup(p++);
5746         if (dummy != res->sr_slot->seq_nr) {
5747                 dprintk("%s Invalid sequence number\n", __func__);
5748                 goto out_err;
5749         }
5750         /* slot id */
5751         dummy = be32_to_cpup(p++);
5752         if (dummy != res->sr_slot->slot_nr) {
5753                 dprintk("%s Invalid slot id\n", __func__);
5754                 goto out_err;
5755         }
5756         /* highest slot id */
5757         res->sr_highest_slotid = be32_to_cpup(p++);
5758         /* target highest slot id */
5759         res->sr_target_highest_slotid = be32_to_cpup(p++);
5760         /* result flags */
5761         res->sr_status_flags = be32_to_cpup(p);
5762         status = 0;
5763 out_err:
5764         res->sr_status = status;
5765         return status;
5766 out_overflow:
5767         print_overflow_msg(__func__, xdr);
5768         status = -EIO;
5769         goto out_err;
5770 #else  /* CONFIG_NFS_V4_1 */
5771         return 0;
5772 #endif /* CONFIG_NFS_V4_1 */
5773 }
5774
5775 #if defined(CONFIG_NFS_V4_1)
5776 /*
5777  * TODO: Need to handle case when EOF != true;
5778  */
5779 static int decode_getdevicelist(struct xdr_stream *xdr,
5780                                 struct pnfs_devicelist *res)
5781 {
5782         __be32 *p;
5783         int status, i;
5784         nfs4_verifier verftemp;
5785
5786         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5787         if (status)
5788                 return status;
5789
5790         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5791         if (unlikely(!p))
5792                 goto out_overflow;
5793
5794         /* TODO: Skip cookie for now */
5795         p += 2;
5796
5797         /* Read verifier */
5798         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5799
5800         res->num_devs = be32_to_cpup(p);
5801
5802         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5803
5804         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5805                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5806                                 __func__, res->num_devs);
5807                 return -EIO;
5808         }
5809
5810         p = xdr_inline_decode(xdr,
5811                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5812         if (unlikely(!p))
5813                 goto out_overflow;
5814         for (i = 0; i < res->num_devs; i++)
5815                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5816                                             NFS4_DEVICEID4_SIZE);
5817         res->eof = be32_to_cpup(p);
5818         return 0;
5819 out_overflow:
5820         print_overflow_msg(__func__, xdr);
5821         return -EIO;
5822 }
5823
5824 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5825                                 struct pnfs_device *pdev)
5826 {
5827         __be32 *p;
5828         uint32_t len, type;
5829         int status;
5830
5831         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5832         if (status) {
5833                 if (status == -ETOOSMALL) {
5834                         p = xdr_inline_decode(xdr, 4);
5835                         if (unlikely(!p))
5836                                 goto out_overflow;
5837                         pdev->mincount = be32_to_cpup(p);
5838                         dprintk("%s: Min count too small. mincnt = %u\n",
5839                                 __func__, pdev->mincount);
5840                 }
5841                 return status;
5842         }
5843
5844         p = xdr_inline_decode(xdr, 8);
5845         if (unlikely(!p))
5846                 goto out_overflow;
5847         type = be32_to_cpup(p++);
5848         if (type != pdev->layout_type) {
5849                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5850                         __func__, pdev->layout_type, type);
5851                 return -EINVAL;
5852         }
5853         /*
5854          * Get the length of the opaque device_addr4. xdr_read_pages places
5855          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5856          * and places the remaining xdr data in xdr_buf->tail
5857          */
5858         pdev->mincount = be32_to_cpup(p);
5859         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5860                 goto out_overflow;
5861
5862         /* Parse notification bitmap, verifying that it is zero. */
5863         p = xdr_inline_decode(xdr, 4);
5864         if (unlikely(!p))
5865                 goto out_overflow;
5866         len = be32_to_cpup(p);
5867         if (len) {
5868                 uint32_t i;
5869
5870                 p = xdr_inline_decode(xdr, 4 * len);
5871                 if (unlikely(!p))
5872                         goto out_overflow;
5873                 for (i = 0; i < len; i++, p++) {
5874                         if (be32_to_cpup(p)) {
5875                                 dprintk("%s: notifications not supported\n",
5876                                         __func__);
5877                                 return -EIO;
5878                         }
5879                 }
5880         }
5881         return 0;
5882 out_overflow:
5883         print_overflow_msg(__func__, xdr);
5884         return -EIO;
5885 }
5886
5887 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5888                             struct nfs4_layoutget_res *res)
5889 {
5890         __be32 *p;
5891         int status;
5892         u32 layout_count;
5893         u32 recvd;
5894
5895         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5896         if (status)
5897                 return status;
5898         p = xdr_inline_decode(xdr, 4);
5899         if (unlikely(!p))
5900                 goto out_overflow;
5901         res->return_on_close = be32_to_cpup(p);
5902         decode_stateid(xdr, &res->stateid);
5903         p = xdr_inline_decode(xdr, 4);
5904         if (unlikely(!p))
5905                 goto out_overflow;
5906         layout_count = be32_to_cpup(p);
5907         if (!layout_count) {
5908                 dprintk("%s: server responded with empty layout array\n",
5909                         __func__);
5910                 return -EINVAL;
5911         }
5912
5913         p = xdr_inline_decode(xdr, 28);
5914         if (unlikely(!p))
5915                 goto out_overflow;
5916         p = xdr_decode_hyper(p, &res->range.offset);
5917         p = xdr_decode_hyper(p, &res->range.length);
5918         res->range.iomode = be32_to_cpup(p++);
5919         res->type = be32_to_cpup(p++);
5920         res->layoutp->len = be32_to_cpup(p);
5921
5922         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5923                 __func__,
5924                 (unsigned long)res->range.offset,
5925                 (unsigned long)res->range.length,
5926                 res->range.iomode,
5927                 res->type,
5928                 res->layoutp->len);
5929
5930         recvd = xdr_read_pages(xdr, res->layoutp->len);
5931         if (res->layoutp->len > recvd) {
5932                 dprintk("NFS: server cheating in layoutget reply: "
5933                                 "layout len %u > recvd %u\n",
5934                                 res->layoutp->len, recvd);
5935                 return -EINVAL;
5936         }
5937
5938         if (layout_count > 1) {
5939                 /* We only handle a length one array at the moment.  Any
5940                  * further entries are just ignored.  Note that this means
5941                  * the client may see a response that is less than the
5942                  * minimum it requested.
5943                  */
5944                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5945                         __func__, layout_count);
5946         }
5947
5948         return 0;
5949 out_overflow:
5950         print_overflow_msg(__func__, xdr);
5951         return -EIO;
5952 }
5953
5954 static int decode_layoutreturn(struct xdr_stream *xdr,
5955                                struct nfs4_layoutreturn_res *res)
5956 {
5957         __be32 *p;
5958         int status;
5959
5960         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5961         if (status)
5962                 return status;
5963         p = xdr_inline_decode(xdr, 4);
5964         if (unlikely(!p))
5965                 goto out_overflow;
5966         res->lrs_present = be32_to_cpup(p);
5967         if (res->lrs_present)
5968                 status = decode_stateid(xdr, &res->stateid);
5969         return status;
5970 out_overflow:
5971         print_overflow_msg(__func__, xdr);
5972         return -EIO;
5973 }
5974
5975 static int decode_layoutcommit(struct xdr_stream *xdr,
5976                                struct rpc_rqst *req,
5977                                struct nfs4_layoutcommit_res *res)
5978 {
5979         __be32 *p;
5980         __u32 sizechanged;
5981         int status;
5982
5983         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5984         res->status = status;
5985         if (status)
5986                 return status;
5987
5988         p = xdr_inline_decode(xdr, 4);
5989         if (unlikely(!p))
5990                 goto out_overflow;
5991         sizechanged = be32_to_cpup(p);
5992
5993         if (sizechanged) {
5994                 /* throw away new size */
5995                 p = xdr_inline_decode(xdr, 8);
5996                 if (unlikely(!p))
5997                         goto out_overflow;
5998         }
5999         return 0;
6000 out_overflow:
6001         print_overflow_msg(__func__, xdr);
6002         return -EIO;
6003 }
6004
6005 static int decode_test_stateid(struct xdr_stream *xdr,
6006                                struct nfs41_test_stateid_res *res)
6007 {
6008         __be32 *p;
6009         int status;
6010         int num_res;
6011
6012         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6013         if (status)
6014                 return status;
6015
6016         p = xdr_inline_decode(xdr, 4);
6017         if (unlikely(!p))
6018                 goto out_overflow;
6019         num_res = be32_to_cpup(p++);
6020         if (num_res != 1)
6021                 goto out;
6022
6023         p = xdr_inline_decode(xdr, 4);
6024         if (unlikely(!p))
6025                 goto out_overflow;
6026         res->status = be32_to_cpup(p++);
6027
6028         return status;
6029 out_overflow:
6030         print_overflow_msg(__func__, xdr);
6031 out:
6032         return -EIO;
6033 }
6034
6035 static int decode_free_stateid(struct xdr_stream *xdr,
6036                                struct nfs41_free_stateid_res *res)
6037 {
6038         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6039         return res->status;
6040 }
6041 #endif /* CONFIG_NFS_V4_1 */
6042
6043 /*
6044  * END OF "GENERIC" DECODE ROUTINES.
6045  */
6046
6047 /*
6048  * Decode OPEN_DOWNGRADE response
6049  */
6050 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6051                                        struct xdr_stream *xdr,
6052                                        struct nfs_closeres *res)
6053 {
6054         struct compound_hdr hdr;
6055         int status;
6056
6057         status = decode_compound_hdr(xdr, &hdr);
6058         if (status)
6059                 goto out;
6060         status = decode_sequence(xdr, &res->seq_res, rqstp);
6061         if (status)
6062                 goto out;
6063         status = decode_putfh(xdr);
6064         if (status)
6065                 goto out;
6066         status = decode_open_downgrade(xdr, res);
6067         if (status != 0)
6068                 goto out;
6069         decode_getfattr(xdr, res->fattr, res->server);
6070 out:
6071         return status;
6072 }
6073
6074 /*
6075  * Decode ACCESS response
6076  */
6077 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6078                                struct nfs4_accessres *res)
6079 {
6080         struct compound_hdr hdr;
6081         int status;
6082
6083         status = decode_compound_hdr(xdr, &hdr);
6084         if (status)
6085                 goto out;
6086         status = decode_sequence(xdr, &res->seq_res, rqstp);
6087         if (status)
6088                 goto out;
6089         status = decode_putfh(xdr);
6090         if (status != 0)
6091                 goto out;
6092         status = decode_access(xdr, &res->supported, &res->access);
6093         if (status != 0)
6094                 goto out;
6095         decode_getfattr(xdr, res->fattr, res->server);
6096 out:
6097         return status;
6098 }
6099
6100 /*
6101  * Decode LOOKUP response
6102  */
6103 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6104                                struct nfs4_lookup_res *res)
6105 {
6106         struct compound_hdr hdr;
6107         int status;
6108
6109         status = decode_compound_hdr(xdr, &hdr);
6110         if (status)
6111                 goto out;
6112         status = decode_sequence(xdr, &res->seq_res, rqstp);
6113         if (status)
6114                 goto out;
6115         status = decode_putfh(xdr);
6116         if (status)
6117                 goto out;
6118         status = decode_lookup(xdr);
6119         if (status)
6120                 goto out;
6121         status = decode_getfh(xdr, res->fh);
6122         if (status)
6123                 goto out;
6124         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6125 out:
6126         return status;
6127 }
6128
6129 /*
6130  * Decode LOOKUP_ROOT response
6131  */
6132 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6133                                     struct xdr_stream *xdr,
6134                                     struct nfs4_lookup_res *res)
6135 {
6136         struct compound_hdr hdr;
6137         int status;
6138
6139         status = decode_compound_hdr(xdr, &hdr);
6140         if (status)
6141                 goto out;
6142         status = decode_sequence(xdr, &res->seq_res, rqstp);
6143         if (status)
6144                 goto out;
6145         status = decode_putrootfh(xdr);
6146         if (status)
6147                 goto out;
6148         status = decode_getfh(xdr, res->fh);
6149         if (status == 0)
6150                 status = decode_getfattr_label(xdr, res->fattr,
6151                                                 res->label, res->server);
6152 out:
6153         return status;
6154 }
6155
6156 /*
6157  * Decode REMOVE response
6158  */
6159 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6160                                struct nfs_removeres *res)
6161 {
6162         struct compound_hdr hdr;
6163         int status;
6164
6165         status = decode_compound_hdr(xdr, &hdr);
6166         if (status)
6167                 goto out;
6168         status = decode_sequence(xdr, &res->seq_res, rqstp);
6169         if (status)
6170                 goto out;
6171         status = decode_putfh(xdr);
6172         if (status)
6173                 goto out;
6174         status = decode_remove(xdr, &res->cinfo);
6175 out:
6176         return status;
6177 }
6178
6179 /*
6180  * Decode RENAME response
6181  */
6182 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6183                                struct nfs_renameres *res)
6184 {
6185         struct compound_hdr hdr;
6186         int status;
6187
6188         status = decode_compound_hdr(xdr, &hdr);
6189         if (status)
6190                 goto out;
6191         status = decode_sequence(xdr, &res->seq_res, rqstp);
6192         if (status)
6193                 goto out;
6194         status = decode_putfh(xdr);
6195         if (status)
6196                 goto out;
6197         status = decode_savefh(xdr);
6198         if (status)
6199                 goto out;
6200         status = decode_putfh(xdr);
6201         if (status)
6202                 goto out;
6203         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6204 out:
6205         return status;
6206 }
6207
6208 /*
6209  * Decode LINK response
6210  */
6211 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6212                              struct nfs4_link_res *res)
6213 {
6214         struct compound_hdr hdr;
6215         int status;
6216
6217         status = decode_compound_hdr(xdr, &hdr);
6218         if (status)
6219                 goto out;
6220         status = decode_sequence(xdr, &res->seq_res, rqstp);
6221         if (status)
6222                 goto out;
6223         status = decode_putfh(xdr);
6224         if (status)
6225                 goto out;
6226         status = decode_savefh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_putfh(xdr);
6230         if (status)
6231                 goto out;
6232         status = decode_link(xdr, &res->cinfo);
6233         if (status)
6234                 goto out;
6235         /*
6236          * Note order: OP_LINK leaves the directory as the current
6237          *             filehandle.
6238          */
6239         status = decode_restorefh(xdr);
6240         if (status)
6241                 goto out;
6242         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6243 out:
6244         return status;
6245 }
6246
6247 /*
6248  * Decode CREATE response
6249  */
6250 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6251                                struct nfs4_create_res *res)
6252 {
6253         struct compound_hdr hdr;
6254         int status;
6255
6256         status = decode_compound_hdr(xdr, &hdr);
6257         if (status)
6258                 goto out;
6259         status = decode_sequence(xdr, &res->seq_res, rqstp);
6260         if (status)
6261                 goto out;
6262         status = decode_putfh(xdr);
6263         if (status)
6264                 goto out;
6265         status = decode_create(xdr, &res->dir_cinfo);
6266         if (status)
6267                 goto out;
6268         status = decode_getfh(xdr, res->fh);
6269         if (status)
6270                 goto out;
6271         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6272 out:
6273         return status;
6274 }
6275
6276 /*
6277  * Decode SYMLINK response
6278  */
6279 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6280                                 struct nfs4_create_res *res)
6281 {
6282         return nfs4_xdr_dec_create(rqstp, xdr, res);
6283 }
6284
6285 /*
6286  * Decode GETATTR response
6287  */
6288 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6289                                 struct nfs4_getattr_res *res)
6290 {
6291         struct compound_hdr hdr;
6292         int status;
6293
6294         status = decode_compound_hdr(xdr, &hdr);
6295         if (status)
6296                 goto out;
6297         status = decode_sequence(xdr, &res->seq_res, rqstp);
6298         if (status)
6299                 goto out;
6300         status = decode_putfh(xdr);
6301         if (status)
6302                 goto out;
6303         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6304 out:
6305         return status;
6306 }
6307
6308 /*
6309  * Encode an SETACL request
6310  */
6311 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6312                                 struct nfs_setaclargs *args)
6313 {
6314         struct compound_hdr hdr = {
6315                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6316         };
6317
6318         encode_compound_hdr(xdr, req, &hdr);
6319         encode_sequence(xdr, &args->seq_args, &hdr);
6320         encode_putfh(xdr, args->fh, &hdr);
6321         encode_setacl(xdr, args, &hdr);
6322         encode_nops(&hdr);
6323 }
6324
6325 /*
6326  * Decode SETACL response
6327  */
6328 static int
6329 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6330                     struct nfs_setaclres *res)
6331 {
6332         struct compound_hdr hdr;
6333         int status;
6334
6335         status = decode_compound_hdr(xdr, &hdr);
6336         if (status)
6337                 goto out;
6338         status = decode_sequence(xdr, &res->seq_res, rqstp);
6339         if (status)
6340                 goto out;
6341         status = decode_putfh(xdr);
6342         if (status)
6343                 goto out;
6344         status = decode_setattr(xdr);
6345 out:
6346         return status;
6347 }
6348
6349 /*
6350  * Decode GETACL response
6351  */
6352 static int
6353 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6354                     struct nfs_getaclres *res)
6355 {
6356         struct compound_hdr hdr;
6357         int status;
6358
6359         if (res->acl_scratch != NULL) {
6360                 void *p = page_address(res->acl_scratch);
6361                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6362         }
6363         status = decode_compound_hdr(xdr, &hdr);
6364         if (status)
6365                 goto out;
6366         status = decode_sequence(xdr, &res->seq_res, rqstp);
6367         if (status)
6368                 goto out;
6369         status = decode_putfh(xdr);
6370         if (status)
6371                 goto out;
6372         status = decode_getacl(xdr, rqstp, res);
6373
6374 out:
6375         return status;
6376 }
6377
6378 /*
6379  * Decode CLOSE response
6380  */
6381 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6382                               struct nfs_closeres *res)
6383 {
6384         struct compound_hdr hdr;
6385         int status;
6386
6387         status = decode_compound_hdr(xdr, &hdr);
6388         if (status)
6389                 goto out;
6390         status = decode_sequence(xdr, &res->seq_res, rqstp);
6391         if (status)
6392                 goto out;
6393         status = decode_putfh(xdr);
6394         if (status)
6395                 goto out;
6396         status = decode_close(xdr, res);
6397         if (status != 0)
6398                 goto out;
6399         /*
6400          * Note: Server may do delete on close for this file
6401          *      in which case the getattr call will fail with
6402          *      an ESTALE error. Shouldn't be a problem,
6403          *      though, since fattr->valid will remain unset.
6404          */
6405         decode_getfattr(xdr, res->fattr, res->server);
6406 out:
6407         return status;
6408 }
6409
6410 /*
6411  * Decode OPEN response
6412  */
6413 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6414                              struct nfs_openres *res)
6415 {
6416         struct compound_hdr hdr;
6417         int status;
6418
6419         status = decode_compound_hdr(xdr, &hdr);
6420         if (status)
6421                 goto out;
6422         status = decode_sequence(xdr, &res->seq_res, rqstp);
6423         if (status)
6424                 goto out;
6425         status = decode_putfh(xdr);
6426         if (status)
6427                 goto out;
6428         status = decode_open(xdr, res);
6429         if (status)
6430                 goto out;
6431         status = decode_getfh(xdr, &res->fh);
6432         if (status)
6433                 goto out;
6434         if (res->access_request)
6435                 decode_access(xdr, &res->access_supported, &res->access_result);
6436         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6437 out:
6438         return status;
6439 }
6440
6441 /*
6442  * Decode OPEN_CONFIRM response
6443  */
6444 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6445                                      struct xdr_stream *xdr,
6446                                      struct nfs_open_confirmres *res)
6447 {
6448         struct compound_hdr hdr;
6449         int status;
6450
6451         status = decode_compound_hdr(xdr, &hdr);
6452         if (status)
6453                 goto out;
6454         status = decode_putfh(xdr);
6455         if (status)
6456                 goto out;
6457         status = decode_open_confirm(xdr, res);
6458 out:
6459         return status;
6460 }
6461
6462 /*
6463  * Decode OPEN response
6464  */
6465 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6466                                     struct xdr_stream *xdr,
6467                                     struct nfs_openres *res)
6468 {
6469         struct compound_hdr hdr;
6470         int status;
6471
6472         status = decode_compound_hdr(xdr, &hdr);
6473         if (status)
6474                 goto out;
6475         status = decode_sequence(xdr, &res->seq_res, rqstp);
6476         if (status)
6477                 goto out;
6478         status = decode_putfh(xdr);
6479         if (status)
6480                 goto out;
6481         status = decode_open(xdr, res);
6482         if (status)
6483                 goto out;
6484         if (res->access_request)
6485                 decode_access(xdr, &res->access_supported, &res->access_result);
6486         decode_getfattr(xdr, res->f_attr, res->server);
6487 out:
6488         return status;
6489 }
6490
6491 /*
6492  * Decode SETATTR response
6493  */
6494 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6495                                 struct xdr_stream *xdr,
6496                                 struct nfs_setattrres *res)
6497 {
6498         struct compound_hdr hdr;
6499         int status;
6500
6501         status = decode_compound_hdr(xdr, &hdr);
6502         if (status)
6503                 goto out;
6504         status = decode_sequence(xdr, &res->seq_res, rqstp);
6505         if (status)
6506                 goto out;
6507         status = decode_putfh(xdr);
6508         if (status)
6509                 goto out;
6510         status = decode_setattr(xdr);
6511         if (status)
6512                 goto out;
6513         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6514 out:
6515         return status;
6516 }
6517
6518 /*
6519  * Decode LOCK response
6520  */
6521 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6522                              struct nfs_lock_res *res)
6523 {
6524         struct compound_hdr hdr;
6525         int status;
6526
6527         status = decode_compound_hdr(xdr, &hdr);
6528         if (status)
6529                 goto out;
6530         status = decode_sequence(xdr, &res->seq_res, rqstp);
6531         if (status)
6532                 goto out;
6533         status = decode_putfh(xdr);
6534         if (status)
6535                 goto out;
6536         status = decode_lock(xdr, res);
6537 out:
6538         return status;
6539 }
6540
6541 /*
6542  * Decode LOCKT response
6543  */
6544 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6545                               struct nfs_lockt_res *res)
6546 {
6547         struct compound_hdr hdr;
6548         int status;
6549
6550         status = decode_compound_hdr(xdr, &hdr);
6551         if (status)
6552                 goto out;
6553         status = decode_sequence(xdr, &res->seq_res, rqstp);
6554         if (status)
6555                 goto out;
6556         status = decode_putfh(xdr);
6557         if (status)
6558                 goto out;
6559         status = decode_lockt(xdr, res);
6560 out:
6561         return status;
6562 }
6563
6564 /*
6565  * Decode LOCKU response
6566  */
6567 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6568                               struct nfs_locku_res *res)
6569 {
6570         struct compound_hdr hdr;
6571         int status;
6572
6573         status = decode_compound_hdr(xdr, &hdr);
6574         if (status)
6575                 goto out;
6576         status = decode_sequence(xdr, &res->seq_res, rqstp);
6577         if (status)
6578                 goto out;
6579         status = decode_putfh(xdr);
6580         if (status)
6581                 goto out;
6582         status = decode_locku(xdr, res);
6583 out:
6584         return status;
6585 }
6586
6587 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6588                                           struct xdr_stream *xdr, void *dummy)
6589 {
6590         struct compound_hdr hdr;
6591         int status;
6592
6593         status = decode_compound_hdr(xdr, &hdr);
6594         if (!status)
6595                 status = decode_release_lockowner(xdr);
6596         return status;
6597 }
6598
6599 /*
6600  * Decode READLINK response
6601  */
6602 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6603                                  struct xdr_stream *xdr,
6604                                  struct nfs4_readlink_res *res)
6605 {
6606         struct compound_hdr hdr;
6607         int status;
6608
6609         status = decode_compound_hdr(xdr, &hdr);
6610         if (status)
6611                 goto out;
6612         status = decode_sequence(xdr, &res->seq_res, rqstp);
6613         if (status)
6614                 goto out;
6615         status = decode_putfh(xdr);
6616         if (status)
6617                 goto out;
6618         status = decode_readlink(xdr, rqstp);
6619 out:
6620         return status;
6621 }
6622
6623 /*
6624  * Decode READDIR response
6625  */
6626 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6627                                 struct nfs4_readdir_res *res)
6628 {
6629         struct compound_hdr hdr;
6630         int status;
6631
6632         status = decode_compound_hdr(xdr, &hdr);
6633         if (status)
6634                 goto out;
6635         status = decode_sequence(xdr, &res->seq_res, rqstp);
6636         if (status)
6637                 goto out;
6638         status = decode_putfh(xdr);
6639         if (status)
6640                 goto out;
6641         status = decode_readdir(xdr, rqstp, res);
6642 out:
6643         return status;
6644 }
6645
6646 /*
6647  * Decode Read response
6648  */
6649 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6650                              struct nfs_pgio_res *res)
6651 {
6652         struct compound_hdr hdr;
6653         int status;
6654
6655         status = decode_compound_hdr(xdr, &hdr);
6656         if (status)
6657                 goto out;
6658         status = decode_sequence(xdr, &res->seq_res, rqstp);
6659         if (status)
6660                 goto out;
6661         status = decode_putfh(xdr);
6662         if (status)
6663                 goto out;
6664         status = decode_read(xdr, rqstp, res);
6665         if (!status)
6666                 status = res->count;
6667 out:
6668         return status;
6669 }
6670
6671 /*
6672  * Decode WRITE response
6673  */
6674 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6675                               struct nfs_pgio_res *res)
6676 {
6677         struct compound_hdr hdr;
6678         int status;
6679
6680         status = decode_compound_hdr(xdr, &hdr);
6681         if (status)
6682                 goto out;
6683         status = decode_sequence(xdr, &res->seq_res, rqstp);
6684         if (status)
6685                 goto out;
6686         status = decode_putfh(xdr);
6687         if (status)
6688                 goto out;
6689         status = decode_write(xdr, res);
6690         if (status)
6691                 goto out;
6692         if (res->fattr)
6693                 decode_getfattr(xdr, res->fattr, res->server);
6694         if (!status)
6695                 status = res->count;
6696 out:
6697         return status;
6698 }
6699
6700 /*
6701  * Decode COMMIT response
6702  */
6703 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6704                                struct nfs_commitres *res)
6705 {
6706         struct compound_hdr hdr;
6707         int status;
6708
6709         status = decode_compound_hdr(xdr, &hdr);
6710         if (status)
6711                 goto out;
6712         status = decode_sequence(xdr, &res->seq_res, rqstp);
6713         if (status)
6714                 goto out;
6715         status = decode_putfh(xdr);
6716         if (status)
6717                 goto out;
6718         status = decode_commit(xdr, res);
6719 out:
6720         return status;
6721 }
6722
6723 /*
6724  * Decode FSINFO response
6725  */
6726 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6727                                struct nfs4_fsinfo_res *res)
6728 {
6729         struct compound_hdr hdr;
6730         int status;
6731
6732         status = decode_compound_hdr(xdr, &hdr);
6733         if (!status)
6734                 status = decode_sequence(xdr, &res->seq_res, req);
6735         if (!status)
6736                 status = decode_putfh(xdr);
6737         if (!status)
6738                 status = decode_fsinfo(xdr, res->fsinfo);
6739         return status;
6740 }
6741
6742 /*
6743  * Decode PATHCONF response
6744  */
6745 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6746                                  struct nfs4_pathconf_res *res)
6747 {
6748         struct compound_hdr hdr;
6749         int status;
6750
6751         status = decode_compound_hdr(xdr, &hdr);
6752         if (!status)
6753                 status = decode_sequence(xdr, &res->seq_res, req);
6754         if (!status)
6755                 status = decode_putfh(xdr);
6756         if (!status)
6757                 status = decode_pathconf(xdr, res->pathconf);
6758         return status;
6759 }
6760
6761 /*
6762  * Decode STATFS response
6763  */
6764 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6765                                struct nfs4_statfs_res *res)
6766 {
6767         struct compound_hdr hdr;
6768         int status;
6769
6770         status = decode_compound_hdr(xdr, &hdr);
6771         if (!status)
6772                 status = decode_sequence(xdr, &res->seq_res, req);
6773         if (!status)
6774                 status = decode_putfh(xdr);
6775         if (!status)
6776                 status = decode_statfs(xdr, res->fsstat);
6777         return status;
6778 }
6779
6780 /*
6781  * Decode GETATTR_BITMAP response
6782  */
6783 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6784                                     struct xdr_stream *xdr,
6785                                     struct nfs4_server_caps_res *res)
6786 {
6787         struct compound_hdr hdr;
6788         int status;
6789
6790         status = decode_compound_hdr(xdr, &hdr);
6791         if (status)
6792                 goto out;
6793         status = decode_sequence(xdr, &res->seq_res, req);
6794         if (status)
6795                 goto out;
6796         status = decode_putfh(xdr);
6797         if (status)
6798                 goto out;
6799         status = decode_server_caps(xdr, res);
6800 out:
6801         return status;
6802 }
6803
6804 /*
6805  * Decode RENEW response
6806  */
6807 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6808                               void *__unused)
6809 {
6810         struct compound_hdr hdr;
6811         int status;
6812
6813         status = decode_compound_hdr(xdr, &hdr);
6814         if (!status)
6815                 status = decode_renew(xdr);
6816         return status;
6817 }
6818
6819 /*
6820  * Decode SETCLIENTID response
6821  */
6822 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6823                                     struct xdr_stream *xdr,
6824                                     struct nfs4_setclientid_res *res)
6825 {
6826         struct compound_hdr hdr;
6827         int status;
6828
6829         status = decode_compound_hdr(xdr, &hdr);
6830         if (!status)
6831                 status = decode_setclientid(xdr, res);
6832         return status;
6833 }
6834
6835 /*
6836  * Decode SETCLIENTID_CONFIRM response
6837  */
6838 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6839                                             struct xdr_stream *xdr)
6840 {
6841         struct compound_hdr hdr;
6842         int status;
6843
6844         status = decode_compound_hdr(xdr, &hdr);
6845         if (!status)
6846                 status = decode_setclientid_confirm(xdr);
6847         return status;
6848 }
6849
6850 /*
6851  * Decode DELEGRETURN response
6852  */
6853 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6854                                     struct xdr_stream *xdr,
6855                                     struct nfs4_delegreturnres *res)
6856 {
6857         struct compound_hdr hdr;
6858         int status;
6859
6860         status = decode_compound_hdr(xdr, &hdr);
6861         if (status)
6862                 goto out;
6863         status = decode_sequence(xdr, &res->seq_res, rqstp);
6864         if (status)
6865                 goto out;
6866         status = decode_putfh(xdr);
6867         if (status != 0)
6868                 goto out;
6869         status = decode_getfattr(xdr, res->fattr, res->server);
6870         if (status != 0)
6871                 goto out;
6872         status = decode_delegreturn(xdr);
6873 out:
6874         return status;
6875 }
6876
6877 /*
6878  * Decode FS_LOCATIONS response
6879  */
6880 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6881                                      struct xdr_stream *xdr,
6882                                      struct nfs4_fs_locations_res *res)
6883 {
6884         struct compound_hdr hdr;
6885         int status;
6886
6887         status = decode_compound_hdr(xdr, &hdr);
6888         if (status)
6889                 goto out;
6890         status = decode_sequence(xdr, &res->seq_res, req);
6891         if (status)
6892                 goto out;
6893         status = decode_putfh(xdr);
6894         if (status)
6895                 goto out;
6896         if (res->migration) {
6897                 xdr_enter_page(xdr, PAGE_SIZE);
6898                 status = decode_getfattr_generic(xdr,
6899                                         &res->fs_locations->fattr,
6900                                          NULL, res->fs_locations,
6901                                          NULL, res->fs_locations->server);
6902                 if (status)
6903                         goto out;
6904                 if (res->renew)
6905                         status = decode_renew(xdr);
6906         } else {
6907                 status = decode_lookup(xdr);
6908                 if (status)
6909                         goto out;
6910                 xdr_enter_page(xdr, PAGE_SIZE);
6911                 status = decode_getfattr_generic(xdr,
6912                                         &res->fs_locations->fattr,
6913                                          NULL, res->fs_locations,
6914                                          NULL, res->fs_locations->server);
6915         }
6916 out:
6917         return status;
6918 }
6919
6920 /*
6921  * Decode SECINFO response
6922  */
6923 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6924                                 struct xdr_stream *xdr,
6925                                 struct nfs4_secinfo_res *res)
6926 {
6927         struct compound_hdr hdr;
6928         int status;
6929
6930         status = decode_compound_hdr(xdr, &hdr);
6931         if (status)
6932                 goto out;
6933         status = decode_sequence(xdr, &res->seq_res, rqstp);
6934         if (status)
6935                 goto out;
6936         status = decode_putfh(xdr);
6937         if (status)
6938                 goto out;
6939         status = decode_secinfo(xdr, res);
6940 out:
6941         return status;
6942 }
6943
6944 /*
6945  * Decode FSID_PRESENT response
6946  */
6947 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6948                                      struct xdr_stream *xdr,
6949                                      struct nfs4_fsid_present_res *res)
6950 {
6951         struct compound_hdr hdr;
6952         int status;
6953
6954         status = decode_compound_hdr(xdr, &hdr);
6955         if (status)
6956                 goto out;
6957         status = decode_sequence(xdr, &res->seq_res, rqstp);
6958         if (status)
6959                 goto out;
6960         status = decode_putfh(xdr);
6961         if (status)
6962                 goto out;
6963         status = decode_getfh(xdr, res->fh);
6964         if (status)
6965                 goto out;
6966         if (res->renew)
6967                 status = decode_renew(xdr);
6968 out:
6969         return status;
6970 }
6971
6972 #if defined(CONFIG_NFS_V4_1)
6973 /*
6974  * Decode BIND_CONN_TO_SESSION response
6975  */
6976 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6977                                         struct xdr_stream *xdr,
6978                                         void *res)
6979 {
6980         struct compound_hdr hdr;
6981         int status;
6982
6983         status = decode_compound_hdr(xdr, &hdr);
6984         if (!status)
6985                 status = decode_bind_conn_to_session(xdr, res);
6986         return status;
6987 }
6988
6989 /*
6990  * Decode EXCHANGE_ID response
6991  */
6992 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6993                                     struct xdr_stream *xdr,
6994                                     void *res)
6995 {
6996         struct compound_hdr hdr;
6997         int status;
6998
6999         status = decode_compound_hdr(xdr, &hdr);
7000         if (!status)
7001                 status = decode_exchange_id(xdr, res);
7002         return status;
7003 }
7004
7005 /*
7006  * Decode CREATE_SESSION response
7007  */
7008 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7009                                        struct xdr_stream *xdr,
7010                                        struct nfs41_create_session_res *res)
7011 {
7012         struct compound_hdr hdr;
7013         int status;
7014
7015         status = decode_compound_hdr(xdr, &hdr);
7016         if (!status)
7017                 status = decode_create_session(xdr, res);
7018         return status;
7019 }
7020
7021 /*
7022  * Decode DESTROY_SESSION response
7023  */
7024 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7025                                         struct xdr_stream *xdr,
7026                                         void *res)
7027 {
7028         struct compound_hdr hdr;
7029         int status;
7030
7031         status = decode_compound_hdr(xdr, &hdr);
7032         if (!status)
7033                 status = decode_destroy_session(xdr, res);
7034         return status;
7035 }
7036
7037 /*
7038  * Decode DESTROY_CLIENTID response
7039  */
7040 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7041                                         struct xdr_stream *xdr,
7042                                         void *res)
7043 {
7044         struct compound_hdr hdr;
7045         int status;
7046
7047         status = decode_compound_hdr(xdr, &hdr);
7048         if (!status)
7049                 status = decode_destroy_clientid(xdr, res);
7050         return status;
7051 }
7052
7053 /*
7054  * Decode SEQUENCE response
7055  */
7056 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7057                                  struct xdr_stream *xdr,
7058                                  struct nfs4_sequence_res *res)
7059 {
7060         struct compound_hdr hdr;
7061         int status;
7062
7063         status = decode_compound_hdr(xdr, &hdr);
7064         if (!status)
7065                 status = decode_sequence(xdr, res, rqstp);
7066         return status;
7067 }
7068
7069 /*
7070  * Decode GET_LEASE_TIME response
7071  */
7072 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7073                                        struct xdr_stream *xdr,
7074                                        struct nfs4_get_lease_time_res *res)
7075 {
7076         struct compound_hdr hdr;
7077         int status;
7078
7079         status = decode_compound_hdr(xdr, &hdr);
7080         if (!status)
7081                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7082         if (!status)
7083                 status = decode_putrootfh(xdr);
7084         if (!status)
7085                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7086         return status;
7087 }
7088
7089 /*
7090  * Decode RECLAIM_COMPLETE response
7091  */
7092 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7093                                          struct xdr_stream *xdr,
7094                                          struct nfs41_reclaim_complete_res *res)
7095 {
7096         struct compound_hdr hdr;
7097         int status;
7098
7099         status = decode_compound_hdr(xdr, &hdr);
7100         if (!status)
7101                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7102         if (!status)
7103                 status = decode_reclaim_complete(xdr, NULL);
7104         return status;
7105 }
7106
7107 /*
7108  * Decode GETDEVICELIST response
7109  */
7110 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7111                                       struct xdr_stream *xdr,
7112                                       struct nfs4_getdevicelist_res *res)
7113 {
7114         struct compound_hdr hdr;
7115         int status;
7116
7117         dprintk("encoding getdevicelist!\n");
7118
7119         status = decode_compound_hdr(xdr, &hdr);
7120         if (status != 0)
7121                 goto out;
7122         status = decode_sequence(xdr, &res->seq_res, rqstp);
7123         if (status != 0)
7124                 goto out;
7125         status = decode_putfh(xdr);
7126         if (status != 0)
7127                 goto out;
7128         status = decode_getdevicelist(xdr, res->devlist);
7129 out:
7130         return status;
7131 }
7132
7133 /*
7134  * Decode GETDEVINFO response
7135  */
7136 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7137                                       struct xdr_stream *xdr,
7138                                       struct nfs4_getdeviceinfo_res *res)
7139 {
7140         struct compound_hdr hdr;
7141         int status;
7142
7143         status = decode_compound_hdr(xdr, &hdr);
7144         if (status != 0)
7145                 goto out;
7146         status = decode_sequence(xdr, &res->seq_res, rqstp);
7147         if (status != 0)
7148                 goto out;
7149         status = decode_getdeviceinfo(xdr, res->pdev);
7150 out:
7151         return status;
7152 }
7153
7154 /*
7155  * Decode LAYOUTGET response
7156  */
7157 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7158                                   struct xdr_stream *xdr,
7159                                   struct nfs4_layoutget_res *res)
7160 {
7161         struct compound_hdr hdr;
7162         int status;
7163
7164         status = decode_compound_hdr(xdr, &hdr);
7165         if (status)
7166                 goto out;
7167         status = decode_sequence(xdr, &res->seq_res, rqstp);
7168         if (status)
7169                 goto out;
7170         status = decode_putfh(xdr);
7171         if (status)
7172                 goto out;
7173         status = decode_layoutget(xdr, rqstp, res);
7174 out:
7175         return status;
7176 }
7177
7178 /*
7179  * Decode LAYOUTRETURN response
7180  */
7181 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7182                                      struct xdr_stream *xdr,
7183                                      struct nfs4_layoutreturn_res *res)
7184 {
7185         struct compound_hdr hdr;
7186         int status;
7187
7188         status = decode_compound_hdr(xdr, &hdr);
7189         if (status)
7190                 goto out;
7191         status = decode_sequence(xdr, &res->seq_res, rqstp);
7192         if (status)
7193                 goto out;
7194         status = decode_putfh(xdr);
7195         if (status)
7196                 goto out;
7197         status = decode_layoutreturn(xdr, res);
7198 out:
7199         return status;
7200 }
7201
7202 /*
7203  * Decode LAYOUTCOMMIT response
7204  */
7205 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7206                                      struct xdr_stream *xdr,
7207                                      struct nfs4_layoutcommit_res *res)
7208 {
7209         struct compound_hdr hdr;
7210         int status;
7211
7212         status = decode_compound_hdr(xdr, &hdr);
7213         if (status)
7214                 goto out;
7215         status = decode_sequence(xdr, &res->seq_res, rqstp);
7216         if (status)
7217                 goto out;
7218         status = decode_putfh(xdr);
7219         if (status)
7220                 goto out;
7221         status = decode_layoutcommit(xdr, rqstp, res);
7222         if (status)
7223                 goto out;
7224         decode_getfattr(xdr, res->fattr, res->server);
7225 out:
7226         return status;
7227 }
7228
7229 /*
7230  * Decode SECINFO_NO_NAME response
7231  */
7232 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7233                                         struct xdr_stream *xdr,
7234                                         struct nfs4_secinfo_res *res)
7235 {
7236         struct compound_hdr hdr;
7237         int status;
7238
7239         status = decode_compound_hdr(xdr, &hdr);
7240         if (status)
7241                 goto out;
7242         status = decode_sequence(xdr, &res->seq_res, rqstp);
7243         if (status)
7244                 goto out;
7245         status = decode_putrootfh(xdr);
7246         if (status)
7247                 goto out;
7248         status = decode_secinfo_no_name(xdr, res);
7249 out:
7250         return status;
7251 }
7252
7253 /*
7254  * Decode TEST_STATEID response
7255  */
7256 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7257                                      struct xdr_stream *xdr,
7258                                      struct nfs41_test_stateid_res *res)
7259 {
7260         struct compound_hdr hdr;
7261         int status;
7262
7263         status = decode_compound_hdr(xdr, &hdr);
7264         if (status)
7265                 goto out;
7266         status = decode_sequence(xdr, &res->seq_res, rqstp);
7267         if (status)
7268                 goto out;
7269         status = decode_test_stateid(xdr, res);
7270 out:
7271         return status;
7272 }
7273
7274 /*
7275  * Decode FREE_STATEID response
7276  */
7277 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7278                                      struct xdr_stream *xdr,
7279                                      struct nfs41_free_stateid_res *res)
7280 {
7281         struct compound_hdr hdr;
7282         int status;
7283
7284         status = decode_compound_hdr(xdr, &hdr);
7285         if (status)
7286                 goto out;
7287         status = decode_sequence(xdr, &res->seq_res, rqstp);
7288         if (status)
7289                 goto out;
7290         status = decode_free_stateid(xdr, res);
7291 out:
7292         return status;
7293 }
7294 #endif /* CONFIG_NFS_V4_1 */
7295
7296 /**
7297  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7298  *                      the local page cache.
7299  * @xdr: XDR stream where entry resides
7300  * @entry: buffer to fill in with entry data
7301  * @plus: boolean indicating whether this should be a readdirplus entry
7302  *
7303  * Returns zero if successful, otherwise a negative errno value is
7304  * returned.
7305  *
7306  * This function is not invoked during READDIR reply decoding, but
7307  * rather whenever an application invokes the getdents(2) system call
7308  * on a directory already in our cache.
7309  */
7310 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7311                        int plus)
7312 {
7313         unsigned int savep;
7314         uint32_t bitmap[3] = {0};
7315         uint32_t len;
7316         __be32 *p = xdr_inline_decode(xdr, 4);
7317         if (unlikely(!p))
7318                 goto out_overflow;
7319         if (*p == xdr_zero) {
7320                 p = xdr_inline_decode(xdr, 4);
7321                 if (unlikely(!p))
7322                         goto out_overflow;
7323                 if (*p == xdr_zero)
7324                         return -EAGAIN;
7325                 entry->eof = 1;
7326                 return -EBADCOOKIE;
7327         }
7328
7329         p = xdr_inline_decode(xdr, 12);
7330         if (unlikely(!p))
7331                 goto out_overflow;
7332         entry->prev_cookie = entry->cookie;
7333         p = xdr_decode_hyper(p, &entry->cookie);
7334         entry->len = be32_to_cpup(p);
7335
7336         p = xdr_inline_decode(xdr, entry->len);
7337         if (unlikely(!p))
7338                 goto out_overflow;
7339         entry->name = (const char *) p;
7340
7341         /*
7342          * In case the server doesn't return an inode number,
7343          * we fake one here.  (We don't use inode number 0,
7344          * since glibc seems to choke on it...)
7345          */
7346         entry->ino = 1;
7347         entry->fattr->valid = 0;
7348
7349         if (decode_attr_bitmap(xdr, bitmap) < 0)
7350                 goto out_overflow;
7351
7352         if (decode_attr_length(xdr, &len, &savep) < 0)
7353                 goto out_overflow;
7354
7355         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7356                         NULL, entry->label, entry->server) < 0)
7357                 goto out_overflow;
7358         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7359                 entry->ino = entry->fattr->mounted_on_fileid;
7360         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7361                 entry->ino = entry->fattr->fileid;
7362
7363         entry->d_type = DT_UNKNOWN;
7364         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7365                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7366
7367         return 0;
7368
7369 out_overflow:
7370         print_overflow_msg(__func__, xdr);
7371         return -EAGAIN;
7372 }
7373
7374 /*
7375  * We need to translate between nfs status return values and
7376  * the local errno values which may not be the same.
7377  */
7378 static struct {
7379         int stat;
7380         int errno;
7381 } nfs_errtbl[] = {
7382         { NFS4_OK,              0               },
7383         { NFS4ERR_PERM,         -EPERM          },
7384         { NFS4ERR_NOENT,        -ENOENT         },
7385         { NFS4ERR_IO,           -errno_NFSERR_IO},
7386         { NFS4ERR_NXIO,         -ENXIO          },
7387         { NFS4ERR_ACCESS,       -EACCES         },
7388         { NFS4ERR_EXIST,        -EEXIST         },
7389         { NFS4ERR_XDEV,         -EXDEV          },
7390         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7391         { NFS4ERR_ISDIR,        -EISDIR         },
7392         { NFS4ERR_INVAL,        -EINVAL         },
7393         { NFS4ERR_FBIG,         -EFBIG          },
7394         { NFS4ERR_NOSPC,        -ENOSPC         },
7395         { NFS4ERR_ROFS,         -EROFS          },
7396         { NFS4ERR_MLINK,        -EMLINK         },
7397         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7398         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7399         { NFS4ERR_DQUOT,        -EDQUOT         },
7400         { NFS4ERR_STALE,        -ESTALE         },
7401         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7402         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7403         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7404         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7405         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7406         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7407         { NFS4ERR_LOCKED,       -EAGAIN         },
7408         { NFS4ERR_SYMLINK,      -ELOOP          },
7409         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7410         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7411         { -1,                   -EIO            }
7412 };
7413
7414 /*
7415  * Convert an NFS error code to a local one.
7416  * This one is used jointly by NFSv2 and NFSv3.
7417  */
7418 static int
7419 nfs4_stat_to_errno(int stat)
7420 {
7421         int i;
7422         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7423                 if (nfs_errtbl[i].stat == stat)
7424                         return nfs_errtbl[i].errno;
7425         }
7426         if (stat <= 10000 || stat > 10100) {
7427                 /* The server is looney tunes. */
7428                 return -EREMOTEIO;
7429         }
7430         /* If we cannot translate the error, the recovery routines should
7431          * handle it.
7432          * Note: remaining NFSv4 error codes have values > 10000, so should
7433          * not conflict with native Linux error codes.
7434          */
7435         return -stat;
7436 }
7437
7438 #define PROC(proc, argtype, restype)                            \
7439 [NFSPROC4_CLNT_##proc] = {                                      \
7440         .p_proc   = NFSPROC4_COMPOUND,                          \
7441         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7442         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7443         .p_arglen = NFS4_##argtype##_sz,                        \
7444         .p_replen = NFS4_##restype##_sz,                        \
7445         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7446         .p_name   = #proc,                                      \
7447 }
7448
7449 struct rpc_procinfo     nfs4_procedures[] = {
7450         PROC(READ,              enc_read,               dec_read),
7451         PROC(WRITE,             enc_write,              dec_write),
7452         PROC(COMMIT,            enc_commit,             dec_commit),
7453         PROC(OPEN,              enc_open,               dec_open),
7454         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7455         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7456         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7457         PROC(CLOSE,             enc_close,              dec_close),
7458         PROC(SETATTR,           enc_setattr,            dec_setattr),
7459         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7460         PROC(RENEW,             enc_renew,              dec_renew),
7461         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7462         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7463         PROC(LOCK,              enc_lock,               dec_lock),
7464         PROC(LOCKT,             enc_lockt,              dec_lockt),
7465         PROC(LOCKU,             enc_locku,              dec_locku),
7466         PROC(ACCESS,            enc_access,             dec_access),
7467         PROC(GETATTR,           enc_getattr,            dec_getattr),
7468         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7469         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7470         PROC(REMOVE,            enc_remove,             dec_remove),
7471         PROC(RENAME,            enc_rename,             dec_rename),
7472         PROC(LINK,              enc_link,               dec_link),
7473         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7474         PROC(CREATE,            enc_create,             dec_create),
7475         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7476         PROC(STATFS,            enc_statfs,             dec_statfs),
7477         PROC(READLINK,          enc_readlink,           dec_readlink),
7478         PROC(READDIR,           enc_readdir,            dec_readdir),
7479         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7480         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7481         PROC(GETACL,            enc_getacl,             dec_getacl),
7482         PROC(SETACL,            enc_setacl,             dec_setacl),
7483         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7484         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7485         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7486         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7487 #if defined(CONFIG_NFS_V4_1)
7488         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7489         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7490         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7491         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7492         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7493         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7494         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7495         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7496         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7497         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7498         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7499         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7500         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7501         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7502         PROC(BIND_CONN_TO_SESSION,
7503                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7504         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7505 #endif /* CONFIG_NFS_V4_1 */
7506 };
7507
7508 const struct rpc_version nfs_version4 = {
7509         .number                 = 4,
7510         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7511         .procs                  = nfs4_procedures
7512 };
7513
7514 /*
7515  * Local variables:
7516  *  c-basic-offset: 8
7517  * End:
7518  */