nfs4xdr.c 162.7 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10
/*
 *  fs/nfs/nfs4xdr.c
 *
 *  Client-side XDR for NFSv4.
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
11
 *
L
Linus Torvalds 已提交
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/param.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/pagemap.h>
#include <linux/proc_fs.h>
#include <linux/kdev_t.h>
#include <linux/sunrpc/clnt.h>
48
#include <linux/sunrpc/msg_prot.h>
L
Linus Torvalds 已提交
49 50 51 52
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
53
#include "nfs4_fs.h"
54
#include "internal.h"
55
#include "pnfs.h"
L
Linus Torvalds 已提交
56 57 58 59 60 61

#define NFSDBG_FACILITY		NFSDBG_XDR

/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO		EIO

62
static int nfs4_stat_to_errno(int);
L
Linus Torvalds 已提交
63 64 65 66 67 68 69 70

/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define NFS4_MAXTAGLEN		20
#else
#define NFS4_MAXTAGLEN		0
#endif

71
/* lock,open owner id:
72
 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
L
Linus Torvalds 已提交
73
 */
74 75
#define open_owner_id_maxsz	(1 + 4)
#define lock_owner_id_maxsz	(1 + 4)
T
Trond Myklebust 已提交
76
#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
L
Linus Torvalds 已提交
77 78 79 80
#define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
#define op_encode_hdr_maxsz	(1)
#define op_decode_hdr_maxsz	(2)
T
Trond Myklebust 已提交
81 82 83 84
#define encode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
#define encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
#define decode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
L
Linus Torvalds 已提交
85 86 87 88 89 90 91 92
#define encode_putfh_maxsz	(op_encode_hdr_maxsz + 1 + \
				(NFS4_FHSIZE >> 2))
#define decode_putfh_maxsz	(op_decode_hdr_maxsz)
#define encode_putrootfh_maxsz	(op_encode_hdr_maxsz)
#define decode_putrootfh_maxsz	(op_decode_hdr_maxsz)
#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
				((3+NFS4_FHSIZE) >> 2))
93 94
#define nfs4_fattr_bitmap_maxsz 3
#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
L
Linus Torvalds 已提交
95 96
#define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
#define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
97 98
#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 100
/* This is based on getfattr, which uses the most attributes: */
#define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
101
				3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
102 103 104
#define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
				nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
T
Trond Myklebust 已提交
105 106 107 108 109
#define encode_attrs_maxsz	(nfs4_fattr_bitmap_maxsz + \
				 1 + 2 + 1 + \
				nfs4_owner_maxsz + \
				nfs4_group_maxsz + \
				4 + 4)
L
Linus Torvalds 已提交
110 111
#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
112 113
#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
F
Fred Isaman 已提交
114
#define encode_fsinfo_maxsz	(encode_getattr_maxsz)
L
Linus Torvalds 已提交
115 116 117 118 119
#define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + 11)
#define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz	(op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
				(op_encode_hdr_maxsz + \
120 121 122 123 124 125
				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
				XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
				1 /* sc_prog */ + \
				XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
				XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
				1) /* sc_cb_ident */
L
Linus Torvalds 已提交
126 127 128 129 130 131 132 133 134
#define decode_setclientid_maxsz \
				(op_decode_hdr_maxsz + \
				2 + \
				1024) /* large value for CLID_INUSE */
#define encode_setclientid_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				3 + (NFS4_VERIFIER_SIZE >> 2))
#define decode_setclientid_confirm_maxsz \
				(op_decode_hdr_maxsz)
135 136
#define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_lookup_maxsz	(op_decode_hdr_maxsz)
137 138
#define encode_share_access_maxsz \
				(2)
139
#define encode_createmode_maxsz	(1 + encode_attrs_maxsz + encode_verifier_maxsz)
140 141 142 143 144 145 146 147
#define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
#define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
#define encode_open_maxsz	(op_encode_hdr_maxsz + \
				2 + encode_share_access_maxsz + 2 + \
				open_owner_id_maxsz + \
				encode_opentype_maxsz + \
				encode_claim_null_maxsz)
#define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
T
Trond Myklebust 已提交
148
#define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
149 150 151
				decode_ace_maxsz)
#define decode_change_info_maxsz	(5)
#define decode_open_maxsz	(op_decode_hdr_maxsz + \
T
Trond Myklebust 已提交
152
				decode_stateid_maxsz + \
153 154 155
				decode_change_info_maxsz + 1 + \
				nfs4_fattr_bitmap_maxsz + \
				decode_delegation_maxsz)
T
Trond Myklebust 已提交
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193
#define encode_open_confirm_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1)
#define decode_open_confirm_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_open_downgrade_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 1 + \
				 encode_share_access_maxsz)
#define decode_open_downgrade_maxsz \
				(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_close_maxsz	(op_encode_hdr_maxsz + \
				 1 + encode_stateid_maxsz)
#define decode_close_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
#define encode_setattr_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + \
				 encode_attrs_maxsz)
#define decode_setattr_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz)
#define encode_read_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
#define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
				 2 + encode_verifier_maxsz + 5)
#define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
#define encode_readlink_maxsz	(op_encode_hdr_maxsz)
#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
#define encode_write_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 4)
#define decode_write_maxsz	(op_decode_hdr_maxsz + \
				 2 + decode_verifier_maxsz)
#define encode_commit_maxsz	(op_encode_hdr_maxsz + 3)
#define decode_commit_maxsz	(op_decode_hdr_maxsz + \
				 decode_verifier_maxsz)
L
Linus Torvalds 已提交
194 195
#define encode_remove_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
196 197
#define decode_remove_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz)
L
Linus Torvalds 已提交
198 199
#define encode_rename_maxsz	(op_encode_hdr_maxsz + \
				2 * nfs4_name_maxsz)
200 201 202
#define decode_rename_maxsz	(op_decode_hdr_maxsz + \
				 decode_change_info_maxsz + \
				 decode_change_info_maxsz)
L
Linus Torvalds 已提交
203 204
#define encode_link_maxsz	(op_encode_hdr_maxsz + \
				nfs4_name_maxsz)
205
#define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
206
#define encode_lockowner_maxsz	(7)
T
Trond Myklebust 已提交
207 208
#define encode_lock_maxsz	(op_encode_hdr_maxsz + \
				 7 + \
209 210
				 1 + encode_stateid_maxsz + 1 + \
				 encode_lockowner_maxsz)
T
Trond Myklebust 已提交
211 212 213 214
#define decode_lock_denied_maxsz \
				(8 + decode_lockowner_maxsz)
#define decode_lock_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
215 216
#define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
				encode_lockowner_maxsz)
T
Trond Myklebust 已提交
217 218 219 220 221 222 223
#define decode_lockt_maxsz	(op_decode_hdr_maxsz + \
				 decode_lock_denied_maxsz)
#define encode_locku_maxsz	(op_encode_hdr_maxsz + 3 + \
				 encode_stateid_maxsz + \
				 4)
#define decode_locku_maxsz	(op_decode_hdr_maxsz + \
				 decode_stateid_maxsz)
224 225 226 227 228
#define encode_release_lockowner_maxsz \
				(op_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define decode_release_lockowner_maxsz \
				(op_decode_hdr_maxsz)
T
Trond Myklebust 已提交
229 230
#define encode_access_maxsz	(op_encode_hdr_maxsz + 1)
#define decode_access_maxsz	(op_decode_hdr_maxsz + 2)
L
Linus Torvalds 已提交
231 232
#define encode_symlink_maxsz	(op_encode_hdr_maxsz + \
				1 + nfs4_name_maxsz + \
233
				1 + \
234
				nfs4_fattr_maxsz)
L
Linus Torvalds 已提交
235 236
#define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
#define encode_create_maxsz	(op_encode_hdr_maxsz + \
T
Trond Myklebust 已提交
237 238
				1 + 2 + nfs4_name_maxsz + \
				encode_attrs_maxsz)
239 240 241
#define decode_create_maxsz	(op_decode_hdr_maxsz + \
				decode_change_info_maxsz + \
				nfs4_fattr_bitmap_maxsz)
T
Trond Myklebust 已提交
242 243
#define encode_statfs_maxsz	(encode_getattr_maxsz)
#define decode_statfs_maxsz	(decode_getattr_maxsz)
L
Linus Torvalds 已提交
244 245
#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
T
Trond Myklebust 已提交
246 247 248 249 250 251
#define encode_getacl_maxsz	(encode_getattr_maxsz)
#define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
				 nfs4_fattr_bitmap_maxsz + 1)
#define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
				 encode_stateid_maxsz + 3)
#define decode_setacl_maxsz	(decode_setattr_maxsz)
252 253 254 255
#define encode_fs_locations_maxsz \
				(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
				(0)
256 257

#if defined(CONFIG_NFS_V4_1)
A
Andy Adamson 已提交
258 259
#define NFS4_MAX_MACHINE_NAME_LEN (64)

B
Benny Halevy 已提交
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
				encode_verifier_maxsz + \
				1 /* co_ownerid.len */ + \
				XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
				1 /* flags */ + \
				1 /* spa_how */ + \
				0 /* SP4_NONE (for now) */ + \
				1 /* zero implemetation id array */)
#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
				2 /* eir_clientid */ + \
				1 /* eir_sequenceid */ + \
				1 /* eir_flags */ + \
				1 /* spr_how */ + \
				0 /* SP4_NONE (for now) */ + \
				2 /* eir_server_owner.so_minor_id */ + \
				/* eir_server_owner.so_major_id<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				/* eir_server_scope<> */ \
				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
				1 /* eir_server_impl_id array length */ + \
				0 /* ignored eir_server_impl_id contents */)
A
Andy Adamson 已提交
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
#define decode_channel_attrs_maxsz  (6 + \
				     1 /* ca_rdma_ird.len */ + \
				     1 /* ca_rdma_ird */)
#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
				     2 /* csa_clientid */ + \
				     1 /* csa_sequence */ + \
				     1 /* csa_flags */ + \
				     encode_channel_attrs_maxsz + \
				     encode_channel_attrs_maxsz + \
				     1 /* csa_cb_program */ + \
				     1 /* csa_sec_parms.len (1) */ + \
				     1 /* cb_secflavor (AUTH_SYS) */ + \
				     1 /* stamp */ + \
				     1 /* machinename.len */ + \
				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
				     1 /* uid */ + \
				     1 /* gid */ + \
				     1 /* gids.len (0) */)
#define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
				     1 /* csr_sequence */ + \
				     1 /* csr_flags */ + \
				     decode_channel_attrs_maxsz + \
				     decode_channel_attrs_maxsz)
A
Andy Adamson 已提交
306 307
#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
A
Andy Adamson 已提交
308 309 310 311
#define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
#define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
312 313
#define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
314 315 316 317 318 319 320 321 322 323 324 325 326
#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
				XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
				1 /* layout type */ + \
				1 /* opaque devaddr4 length */ + \
				  /* devaddr4 payload is read into page */ \
				1 /* notification bitmap length */ + \
				1 /* notification bitmap */)
#define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
				encode_stateid_maxsz)
#define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
				decode_stateid_maxsz + \
				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
327 328 329 330 331
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz	0
#define decode_sequence_maxsz	0
#endif /* CONFIG_NFS_V4_1 */

L
Linus Torvalds 已提交
332 333 334
#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
335
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
336
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
337
				encode_read_maxsz)
L
Linus Torvalds 已提交
338
#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
339
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
340
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
341
				decode_read_maxsz)
L
Linus Torvalds 已提交
342
#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
343
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
344
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
345
				encode_readlink_maxsz)
L
Linus Torvalds 已提交
346
#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
347
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
348
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
349
				decode_readlink_maxsz)
L
Linus Torvalds 已提交
350
#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
351
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
352
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
353
				encode_readdir_maxsz)
L
Linus Torvalds 已提交
354
#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
355
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
356
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
357
				decode_readdir_maxsz)
L
Linus Torvalds 已提交
358
#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
359
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
360
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
361
				encode_write_maxsz + \
362
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
363
#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
364
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
365
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
366
				decode_write_maxsz + \
367
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
368
#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
369
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
370
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
371
				encode_commit_maxsz + \
372
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
373
#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
374
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
375
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
376
				decode_commit_maxsz + \
377
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
378
#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
379
				encode_sequence_maxsz + \
380 381 382 383 384 385 386
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_open_maxsz + \
				encode_getfh_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
387
#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
388
				decode_sequence_maxsz + \
389 390 391 392 393 394 395
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_open_maxsz + \
				decode_getfh_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
T
Trond Myklebust 已提交
396 397 398 399 400 401 402 403
#define NFS4_enc_open_confirm_sz \
				(compound_encode_hdr_maxsz + \
				 encode_putfh_maxsz + \
				 encode_open_confirm_maxsz)
#define NFS4_dec_open_confirm_sz \
				(compound_decode_hdr_maxsz + \
				 decode_putfh_maxsz + \
				 decode_open_confirm_maxsz)
L
Linus Torvalds 已提交
404
#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
405
					encode_sequence_maxsz + \
L
Linus Torvalds 已提交
406
					encode_putfh_maxsz + \
407 408
					encode_open_maxsz + \
					encode_getattr_maxsz)
L
Linus Torvalds 已提交
409
#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
410
					decode_sequence_maxsz + \
L
Linus Torvalds 已提交
411
					decode_putfh_maxsz + \
412 413
					decode_open_maxsz + \
					decode_getattr_maxsz)
L
Linus Torvalds 已提交
414 415
#define NFS4_enc_open_downgrade_sz \
				(compound_encode_hdr_maxsz + \
416
				 encode_sequence_maxsz + \
T
Trond Myklebust 已提交
417 418 419
				 encode_putfh_maxsz + \
				 encode_open_downgrade_maxsz + \
				 encode_getattr_maxsz)
L
Linus Torvalds 已提交
420 421
#define NFS4_dec_open_downgrade_sz \
				(compound_decode_hdr_maxsz + \
422
				 decode_sequence_maxsz + \
T
Trond Myklebust 已提交
423 424 425 426
				 decode_putfh_maxsz + \
				 decode_open_downgrade_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
427
				 encode_sequence_maxsz + \
T
Trond Myklebust 已提交
428 429 430 431
				 encode_putfh_maxsz + \
				 encode_close_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
432
				 decode_sequence_maxsz + \
T
Trond Myklebust 已提交
433 434 435 436
				 decode_putfh_maxsz + \
				 decode_close_maxsz + \
				 decode_getattr_maxsz)
#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
437
				 encode_sequence_maxsz + \
T
Trond Myklebust 已提交
438 439 440 441
				 encode_putfh_maxsz + \
				 encode_setattr_maxsz + \
				 encode_getattr_maxsz)
#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
442
				 decode_sequence_maxsz + \
T
Trond Myklebust 已提交
443 444 445
				 decode_putfh_maxsz + \
				 decode_setattr_maxsz + \
				 decode_getattr_maxsz)
L
Linus Torvalds 已提交
446
#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
447
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
448 449 450
				encode_putfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
451
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472
				decode_putfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
				encode_renew_maxsz)
#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
				decode_renew_maxsz)
#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
				encode_setclientid_maxsz)
#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
				decode_setclientid_maxsz)
#define NFS4_enc_setclientid_confirm_sz \
				(compound_encode_hdr_maxsz + \
				encode_setclientid_confirm_maxsz + \
				encode_putrootfh_maxsz + \
				encode_fsinfo_maxsz)
#define NFS4_dec_setclientid_confirm_sz \
				(compound_decode_hdr_maxsz + \
				decode_setclientid_confirm_maxsz + \
				decode_putrootfh_maxsz + \
				decode_fsinfo_maxsz)
#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
473
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
474
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
475
				encode_lock_maxsz)
L
Linus Torvalds 已提交
476
#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
477
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
478
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
479
				decode_lock_maxsz)
L
Linus Torvalds 已提交
480
#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
481
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
482
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
483 484
				encode_lockt_maxsz)
#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
485
				 decode_sequence_maxsz + \
T
Trond Myklebust 已提交
486 487
				 decode_putfh_maxsz + \
				 decode_lockt_maxsz)
L
Linus Torvalds 已提交
488
#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
489
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
490
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
491
				encode_locku_maxsz)
L
Linus Torvalds 已提交
492
#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
493
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
494
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
495
				decode_locku_maxsz)
496 497 498 499 500 501
#define NFS4_enc_release_lockowner_sz \
				(compound_encode_hdr_maxsz + \
				 encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
				(compound_decode_hdr_maxsz + \
				 decode_lockowner_maxsz)
L
Linus Torvalds 已提交
502
#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
503
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
504
				encode_putfh_maxsz + \
505 506
				encode_access_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
507
#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
508
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
509
				decode_putfh_maxsz + \
510 511
				decode_access_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
512
#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
513
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
514 515 516
				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
517
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
518 519 520
				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
521
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
522 523 524 525 526
				encode_putfh_maxsz + \
				encode_lookup_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
527
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
528
				decode_putfh_maxsz + \
529
				decode_lookup_maxsz + \
L
Linus Torvalds 已提交
530 531 532
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
533
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
534 535 536 537
				encode_putrootfh_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
538
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
539 540 541 542
				decode_putrootfh_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
543
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
544
				encode_putfh_maxsz + \
545 546
				encode_remove_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
547
#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
548
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
549
				decode_putfh_maxsz + \
550
				decode_remove_maxsz + \
551
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
552
#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
553
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
554 555 556
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
557 558 559 560
				encode_rename_maxsz + \
				encode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
561
#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
562
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
563 564 565
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
566 567 568 569
				decode_rename_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
570
#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
571
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
572 573 574
				encode_putfh_maxsz + \
				encode_savefh_maxsz + \
				encode_putfh_maxsz + \
575 576 577 578
				encode_link_maxsz + \
				decode_getattr_maxsz + \
				encode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
579
#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
580
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
581 582 583
				decode_putfh_maxsz + \
				decode_savefh_maxsz + \
				decode_putfh_maxsz + \
584 585 586 587
				decode_link_maxsz + \
				decode_getattr_maxsz + \
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
588
#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
589
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
590 591 592 593 594
				encode_putfh_maxsz + \
				encode_symlink_maxsz + \
				encode_getattr_maxsz + \
				encode_getfh_maxsz)
#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
595
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
596 597 598 599 600
				decode_putfh_maxsz + \
				decode_symlink_maxsz + \
				decode_getattr_maxsz + \
				decode_getfh_maxsz)
#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
601
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
602
				encode_putfh_maxsz + \
603
				encode_savefh_maxsz + \
L
Linus Torvalds 已提交
604
				encode_create_maxsz + \
605
				encode_getfh_maxsz + \
L
Linus Torvalds 已提交
606
				encode_getattr_maxsz + \
607 608
				encode_restorefh_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
609
#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
610
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
611
				decode_putfh_maxsz + \
612
				decode_savefh_maxsz + \
L
Linus Torvalds 已提交
613
				decode_create_maxsz + \
614
				decode_getfh_maxsz + \
L
Linus Torvalds 已提交
615
				decode_getattr_maxsz + \
616 617
				decode_restorefh_maxsz + \
				decode_getattr_maxsz)
L
Linus Torvalds 已提交
618
#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
619
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
620 621 622
				encode_putfh_maxsz + \
				encode_getattr_maxsz)
#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
623
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
624 625 626
				decode_putfh_maxsz + \
				decode_getattr_maxsz)
#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
627
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
628
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
629
				encode_statfs_maxsz)
L
Linus Torvalds 已提交
630
#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
631
				decode_sequence_maxsz + \
L
Linus Torvalds 已提交
632
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
633
				decode_statfs_maxsz)
L
Linus Torvalds 已提交
634
#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
635
				encode_sequence_maxsz + \
636
				encode_putfh_maxsz + \
L
Linus Torvalds 已提交
637 638
				encode_getattr_maxsz)
#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
639
				decode_sequence_maxsz + \
640
				decode_putfh_maxsz + \
L
Linus Torvalds 已提交
641 642
				decode_getattr_maxsz)
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
643
				encode_sequence_maxsz + \
L
Linus Torvalds 已提交
644
				encode_putfh_maxsz + \
645 646
				encode_delegreturn_maxsz + \
				encode_getattr_maxsz)
L
Linus Torvalds 已提交
647
#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
648
				decode_sequence_maxsz + \
649 650
				decode_delegreturn_maxsz + \
				decode_getattr_maxsz)
651
#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
652
				encode_sequence_maxsz + \
653
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
654
				encode_getacl_maxsz)
655
#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
656
				decode_sequence_maxsz + \
657
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
658
				decode_getacl_maxsz)
659
#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
660
				encode_sequence_maxsz + \
661
				encode_putfh_maxsz + \
T
Trond Myklebust 已提交
662
				encode_setacl_maxsz)
663
#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
664
				decode_sequence_maxsz + \
665
				decode_putfh_maxsz + \
T
Trond Myklebust 已提交
666
				decode_setacl_maxsz)
667 668
#define NFS4_enc_fs_locations_sz \
				(compound_encode_hdr_maxsz + \
669
				 encode_sequence_maxsz + \
670
				 encode_putfh_maxsz + \
671 672
				 encode_lookup_maxsz + \
				 encode_fs_locations_maxsz)
673 674
#define NFS4_dec_fs_locations_sz \
				(compound_decode_hdr_maxsz + \
675
				 decode_sequence_maxsz + \
676
				 decode_putfh_maxsz + \
677 678
				 decode_lookup_maxsz + \
				 decode_fs_locations_maxsz)
B
Benny Halevy 已提交
679 680 681 682 683 684 685
#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
				(compound_encode_hdr_maxsz + \
				 encode_exchange_id_maxsz)
#define NFS4_dec_exchange_id_sz \
				(compound_decode_hdr_maxsz + \
				 decode_exchange_id_maxsz)
A
Andy Adamson 已提交
686 687 688 689 690 691
#define NFS4_enc_create_session_sz \
				(compound_encode_hdr_maxsz + \
				 encode_create_session_maxsz)
#define NFS4_dec_create_session_sz \
				(compound_decode_hdr_maxsz + \
				 decode_create_session_maxsz)
A
Andy Adamson 已提交
692 693 694 695
#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
					 encode_destroy_session_maxsz)
#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
					 decode_destroy_session_maxsz)
A
Andy Adamson 已提交
696 697 698 699 700 701
#define NFS4_enc_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 encode_sequence_maxsz)
#define NFS4_dec_sequence_sz \
				(compound_decode_hdr_maxsz + \
				 decode_sequence_maxsz)
A
Andy Adamson 已提交
702 703 704 705 706 707 708 709
#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_putrootfh_maxsz + \
					 encode_fsinfo_maxsz)
#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_putrootfh_maxsz + \
					 decode_fsinfo_maxsz)
710 711 712 713 714 715
#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
					 encode_sequence_maxsz + \
					 encode_reclaim_complete_maxsz)
#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
					 decode_sequence_maxsz + \
					 decode_reclaim_complete_maxsz)
716 717 718 719 720 721 722 723 724 725 726 727 728 729
#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
				encode_sequence_maxsz +\
				encode_getdeviceinfo_maxsz)
#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
				decode_sequence_maxsz + \
				decode_getdeviceinfo_maxsz)
#define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
				encode_sequence_maxsz + \
				encode_putfh_maxsz +        \
				encode_layoutget_maxsz)
#define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
				decode_sequence_maxsz + \
				decode_putfh_maxsz +        \
				decode_layoutget_maxsz)
730 731 732 733 734 735 736 737 738 739 740 741 742

const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				      compound_encode_hdr_maxsz +
				      encode_sequence_maxsz +
				      encode_putfh_maxsz +
				      encode_getattr_maxsz) *
				     XDR_UNIT);

const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
				     compound_decode_hdr_maxsz +
				     decode_sequence_maxsz +
				     decode_putfh_maxsz) *
				    XDR_UNIT);
B
Benny Halevy 已提交
743
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
744

745 746 747 748 749 750 751 752 753 754 755
static const umode_t nfs_type2fmt[] = {
	[NF4BAD] = 0,
	[NF4REG] = S_IFREG,
	[NF4DIR] = S_IFDIR,
	[NF4BLK] = S_IFBLK,
	[NF4CHR] = S_IFCHR,
	[NF4LNK] = S_IFLNK,
	[NF4SOCK] = S_IFSOCK,
	[NF4FIFO] = S_IFIFO,
	[NF4ATTRDIR] = 0,
	[NF4NAMEDATTR] = 0,
L
Linus Torvalds 已提交
756 757 758 759 760
};

struct compound_hdr {
	int32_t		status;
	uint32_t	nops;
761
	__be32 *	nops_p;
L
Linus Torvalds 已提交
762 763
	uint32_t	taglen;
	char *		tag;
764
	uint32_t	replen;		/* expected reply words */
765
	u32		minorversion;
L
Linus Torvalds 已提交
766 767
};

768 769 770 771 772 773
static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
{
	__be32 *p = xdr_reserve_space(xdr, nbytes);
	BUG_ON(!p);
	return p;
}
L
Linus Torvalds 已提交
774 775 776

static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
A
Al Viro 已提交
777
	__be32 *p;
L
Linus Torvalds 已提交
778 779 780 781 782 783

	p = xdr_reserve_space(xdr, 4 + len);
	BUG_ON(p == NULL);
	xdr_encode_opaque(p, str, len);
}

784 785 786
static void encode_compound_hdr(struct xdr_stream *xdr,
				struct rpc_rqst *req,
				struct compound_hdr *hdr)
L
Linus Torvalds 已提交
787
{
A
Al Viro 已提交
788
	__be32 *p;
789
	struct rpc_auth *auth = req->rq_cred->cr_auth;
790 791 792 793 794

	/* initialize running count of expected bytes in reply.
	 * NOTE: the replied tag SHOULD be the same is the one sent,
	 * but this is not required as a MUST for the server to do so. */
	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
L
Linus Torvalds 已提交
795 796 797

	dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
	BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
798 799
	p = reserve_space(xdr, 4 + hdr->taglen + 8);
	p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
B
Benny Halevy 已提交
800
	*p++ = cpu_to_be32(hdr->minorversion);
801
	hdr->nops_p = p;
802
	*p = cpu_to_be32(hdr->nops);
803 804 805 806
}

static void encode_nops(struct compound_hdr *hdr)
{
A
Andy Adamson 已提交
807
	BUG_ON(hdr->nops > NFS4_MAX_OPS);
808
	*hdr->nops_p = htonl(hdr->nops);
L
Linus Torvalds 已提交
809 810 811 812
}

static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
{
A
Al Viro 已提交
813
	__be32 *p;
L
Linus Torvalds 已提交
814 815 816 817 818 819

	p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
	BUG_ON(p == NULL);
	xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
}

820
static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
L
Linus Torvalds 已提交
821 822 823 824 825
{
	char owner_name[IDMAP_NAMESZ];
	char owner_group[IDMAP_NAMESZ];
	int owner_namelen = 0;
	int owner_grouplen = 0;
A
Al Viro 已提交
826 827
	__be32 *p;
	__be32 *q;
L
Linus Torvalds 已提交
828 829 830 831 832 833 834 835 836
	int len;
	uint32_t bmval0 = 0;
	uint32_t bmval1 = 0;

	/*
	 * We reserve enough space to write the entire attribute buffer at once.
	 * In the worst-case, this would be
	 *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
	 *          = 36 bytes, plus any contribution from variable-length fields
837
	 *            such as owner/group.
L
Linus Torvalds 已提交
838 839 840 841 842 843 844 845 846
	 */
	len = 16;

	/* Sigh */
	if (iap->ia_valid & ATTR_SIZE)
		len += 8;
	if (iap->ia_valid & ATTR_MODE)
		len += 4;
	if (iap->ia_valid & ATTR_UID) {
B
Bryan Schumaker 已提交
847
		owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
848
		if (owner_namelen < 0) {
849 850
			dprintk("nfs: couldn't resolve uid %d to string\n",
					iap->ia_uid);
L
Linus Torvalds 已提交
851 852 853 854 855 856 857 858
			/* XXX */
			strcpy(owner_name, "nobody");
			owner_namelen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
	}
	if (iap->ia_valid & ATTR_GID) {
B
Bryan Schumaker 已提交
859
		owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
L
Linus Torvalds 已提交
860
		if (owner_grouplen < 0) {
861 862
			dprintk("nfs: couldn't resolve gid %d to string\n",
					iap->ia_gid);
L
Linus Torvalds 已提交
863 864 865 866 867 868 869 870 871 872 873 874 875 876
			strcpy(owner_group, "nobody");
			owner_grouplen = sizeof("nobody") - 1;
			/* goto out; */
		}
		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
	}
	if (iap->ia_valid & ATTR_ATIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_ATIME)
		len += 4;
	if (iap->ia_valid & ATTR_MTIME_SET)
		len += 16;
	else if (iap->ia_valid & ATTR_MTIME)
		len += 4;
877
	p = reserve_space(xdr, len);
L
Linus Torvalds 已提交
878 879 880 881 882

	/*
	 * We write the bitmap length now, but leave the bitmap and the attribute
	 * buffer length to be backfilled at the end of this routine.
	 */
B
Benny Halevy 已提交
883
	*p++ = cpu_to_be32(2);
L
Linus Torvalds 已提交
884 885 886 887 888
	q = p;
	p += 3;

	if (iap->ia_valid & ATTR_SIZE) {
		bmval0 |= FATTR4_WORD0_SIZE;
B
Benny Halevy 已提交
889
		p = xdr_encode_hyper(p, iap->ia_size);
L
Linus Torvalds 已提交
890 891 892
	}
	if (iap->ia_valid & ATTR_MODE) {
		bmval1 |= FATTR4_WORD1_MODE;
B
Benny Halevy 已提交
893
		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
L
Linus Torvalds 已提交
894 895 896
	}
	if (iap->ia_valid & ATTR_UID) {
		bmval1 |= FATTR4_WORD1_OWNER;
897
		p = xdr_encode_opaque(p, owner_name, owner_namelen);
L
Linus Torvalds 已提交
898 899 900
	}
	if (iap->ia_valid & ATTR_GID) {
		bmval1 |= FATTR4_WORD1_OWNER_GROUP;
901
		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
L
Linus Torvalds 已提交
902 903 904
	}
	if (iap->ia_valid & ATTR_ATIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
905 906
		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
907 908
		*p++ = cpu_to_be32(iap->ia_atime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
L
Linus Torvalds 已提交
909 910 911
	}
	else if (iap->ia_valid & ATTR_ATIME) {
		bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
B
Benny Halevy 已提交
912
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
913 914 915
	}
	if (iap->ia_valid & ATTR_MTIME_SET) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
Benny Halevy 已提交
916 917 918 919
		*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
		*p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
L
Linus Torvalds 已提交
920 921 922
	}
	else if (iap->ia_valid & ATTR_MTIME) {
		bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
B
Benny Halevy 已提交
923
		*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
L
Linus Torvalds 已提交
924
	}
925

L
Linus Torvalds 已提交
926 927 928 929
	/*
	 * Now we backfill the bitmap and the attribute buffer length.
	 */
	if (len != ((char *)p - (char *)q) + 4) {
930
		printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
L
Linus Torvalds 已提交
931 932 933 934 935 936
				len, ((char *)p - (char *)q) + 4);
		BUG();
	}
	len = (char *)p - (char *)q - 12;
	*q++ = htonl(bmval0);
	*q++ = htonl(bmval1);
937
	*q = htonl(len);
L
Linus Torvalds 已提交
938 939 940 941

/* out: */
}

942
static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
943
{
A
Al Viro 已提交
944
	__be32 *p;
L
Linus Torvalds 已提交
945

946
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
947
	*p++ = cpu_to_be32(OP_ACCESS);
948
	*p = cpu_to_be32(access);
949
	hdr->nops++;
950
	hdr->replen += decode_access_maxsz;
L
Linus Torvalds 已提交
951 952
}

953
static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
954
{
A
Al Viro 已提交
955
	__be32 *p;
L
Linus Torvalds 已提交
956

957
	p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
958 959
	*p++ = cpu_to_be32(OP_CLOSE);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
960
	xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
961
	hdr->nops++;
962
	hdr->replen += decode_close_maxsz;
L
Linus Torvalds 已提交
963 964
}

965
static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
966
{
A
Al Viro 已提交
967
	__be32 *p;
968

969
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
970
	*p++ = cpu_to_be32(OP_COMMIT);
B
Benny Halevy 已提交
971
	p = xdr_encode_hyper(p, args->offset);
972
	*p = cpu_to_be32(args->count);
973
	hdr->nops++;
974
	hdr->replen += decode_commit_maxsz;
L
Linus Torvalds 已提交
975 976
}

977
static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
978
{
A
Al Viro 已提交
979
	__be32 *p;
980

981
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
982
	*p++ = cpu_to_be32(OP_CREATE);
983
	*p = cpu_to_be32(create->ftype);
L
Linus Torvalds 已提交
984 985 986

	switch (create->ftype) {
	case NF4LNK:
987
		p = reserve_space(xdr, 4);
988
		*p = cpu_to_be32(create->u.symlink.len);
989
		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
L
Linus Torvalds 已提交
990 991 992
		break;

	case NF4BLK: case NF4CHR:
993
		p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
994
		*p++ = cpu_to_be32(create->u.device.specdata1);
995
		*p = cpu_to_be32(create->u.device.specdata2);
L
Linus Torvalds 已提交
996 997 998 999 1000 1001
		break;

	default:
		break;
	}

1002
	encode_string(xdr, create->name->len, create->name->name);
1003
	hdr->nops++;
1004
	hdr->replen += decode_create_maxsz;
L
Linus Torvalds 已提交
1005

1006
	encode_attrs(xdr, create->attrs, create->server);
L
Linus Torvalds 已提交
1007 1008
}

1009
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1010
{
A
Andy Adamson 已提交
1011
	__be32 *p;
L
Linus Torvalds 已提交
1012

1013
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1014 1015
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(1);
1016
	*p = cpu_to_be32(bitmap);
1017
	hdr->nops++;
1018
	hdr->replen += decode_getattr_maxsz;
L
Linus Torvalds 已提交
1019 1020
}

1021
static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1022
{
A
Andy Adamson 已提交
1023
	__be32 *p;
L
Linus Torvalds 已提交
1024

1025
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1026 1027 1028
	*p++ = cpu_to_be32(OP_GETATTR);
	*p++ = cpu_to_be32(2);
	*p++ = cpu_to_be32(bm0);
1029
	*p = cpu_to_be32(bm1);
1030
	hdr->nops++;
1031
	hdr->replen += decode_getattr_maxsz;
L
Linus Torvalds 已提交
1032 1033
}

1034
static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1035
{
1036 1037
	encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
			   bitmask[1] & nfs4_fattr_bitmap[1], hdr);
L
Linus Torvalds 已提交
1038 1039
}

1040
static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1041
{
1042 1043
	encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
			   bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
L
Linus Torvalds 已提交
1044 1045
}

1046
static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047
{
1048 1049
	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 1051
}

1052
static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1053
{
A
Al Viro 已提交
1054
	__be32 *p;
L
Linus Torvalds 已提交
1055

1056
	p = reserve_space(xdr, 4);
1057
	*p = cpu_to_be32(OP_GETFH);
1058
	hdr->nops++;
1059
	hdr->replen += decode_getfh_maxsz;
L
Linus Torvalds 已提交
1060 1061
}

1062
static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1063
{
A
Al Viro 已提交
1064
	__be32 *p;
L
Linus Torvalds 已提交
1065

1066
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1067
	*p++ = cpu_to_be32(OP_LINK);
1068
	xdr_encode_opaque(p, name->name, name->len);
1069
	hdr->nops++;
1070
	hdr->replen += decode_link_maxsz;
L
Linus Torvalds 已提交
1071 1072
}

T
Trond Myklebust 已提交
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
	if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
		return block ? NFS4_READW_LT : NFS4_READ_LT;
	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}

static inline uint64_t nfs4_lock_length(struct file_lock *fl)
{
	if (fl->fl_end == OFFSET_MAX)
		return ~(uint64_t)0;
	return fl->fl_end - fl->fl_start + 1;
}

1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
{
	__be32 *p;

	p = reserve_space(xdr, 28);
	p = xdr_encode_hyper(p, lowner->clientid);
	*p++ = cpu_to_be32(16);
	p = xdr_encode_opaque_fixed(p, "lock id:", 8);
	xdr_encode_hyper(p, lowner->id);
}

L
Linus Torvalds 已提交
1098 1099 1100 1101
/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
1102
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1103
{
A
Al Viro 已提交
1104
	__be32 *p;
L
Linus Torvalds 已提交
1105

1106
	p = reserve_space(xdr, 32);
B
Benny Halevy 已提交
1107 1108 1109
	*p++ = cpu_to_be32(OP_LOCK);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
	*p++ = cpu_to_be32(args->reclaim);
B
Benny Halevy 已提交
1110 1111
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112
	*p = cpu_to_be32(args->new_lock_owner);
T
Trond Myklebust 已提交
1113
	if (args->new_lock_owner){
1114
		p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1115
		*p++ = cpu_to_be32(args->open_seqid->sequence->counter);
B
Benny Halevy 已提交
1116
		p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1117
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118
		encode_lockowner(xdr, &args->lock_owner);
L
Linus Torvalds 已提交
1119 1120
	}
	else {
1121
		p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1122
		p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123
		*p = cpu_to_be32(args->lock_seqid->sequence->counter);
L
Linus Torvalds 已提交
1124
	}
1125
	hdr->nops++;
1126
	hdr->replen += decode_lock_maxsz;
L
Linus Torvalds 已提交
1127 1128
}

1129
static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1130
{
A
Al Viro 已提交
1131
	__be32 *p;
L
Linus Torvalds 已提交
1132

1133
	p = reserve_space(xdr, 24);
B
Benny Halevy 已提交
1134 1135
	*p++ = cpu_to_be32(OP_LOCKT);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
B
Benny Halevy 已提交
1136 1137
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1138
	encode_lockowner(xdr, &args->lock_owner);
1139
	hdr->nops++;
1140
	hdr->replen += decode_lockt_maxsz;
L
Linus Torvalds 已提交
1141 1142
}

1143
static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1144
{
A
Al Viro 已提交
1145
	__be32 *p;
L
Linus Torvalds 已提交
1146

1147
	p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
B
Benny Halevy 已提交
1148 1149 1150
	*p++ = cpu_to_be32(OP_LOCKU);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
	*p++ = cpu_to_be32(args->seqid->sequence->counter);
B
Benny Halevy 已提交
1151
	p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1152
	p = xdr_encode_hyper(p, args->fl->fl_start);
1153
	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154
	hdr->nops++;
1155
	hdr->replen += decode_locku_maxsz;
L
Linus Torvalds 已提交
1156 1157
}

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
	encode_lockowner(xdr, lowner);
	hdr->nops++;
	hdr->replen += decode_release_lockowner_maxsz;
}

1169
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1170 1171
{
	int len = name->len;
A
Al Viro 已提交
1172
	__be32 *p;
L
Linus Torvalds 已提交
1173

1174
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1175
	*p++ = cpu_to_be32(OP_LOOKUP);
1176
	xdr_encode_opaque(p, name->name, len);
1177
	hdr->nops++;
1178
	hdr->replen += decode_lookup_maxsz;
L
Linus Torvalds 已提交
1179 1180
}

1181
static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
L
Linus Torvalds 已提交
1182
{
A
Al Viro 已提交
1183
	__be32 *p;
L
Linus Torvalds 已提交
1184

1185
	p = reserve_space(xdr, 8);
1186
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
A
Andy Adamson 已提交
1187
	case FMODE_READ:
B
Benny Halevy 已提交
1188
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
A
Andy Adamson 已提交
1189 1190
		break;
	case FMODE_WRITE:
B
Benny Halevy 已提交
1191
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
A
Andy Adamson 已提交
1192 1193
		break;
	case FMODE_READ|FMODE_WRITE:
B
Benny Halevy 已提交
1194
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
A
Andy Adamson 已提交
1195 1196
		break;
	default:
B
Benny Halevy 已提交
1197
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
1198
	}
1199
	*p = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
L
Linus Torvalds 已提交
1200 1201 1202 1203
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1204
	__be32 *p;
L
Linus Torvalds 已提交
1205 1206 1207 1208
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
1209
	p = reserve_space(xdr, 8);
B
Benny Halevy 已提交
1210
	*p++ = cpu_to_be32(OP_OPEN);
1211
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1212
	encode_share_access(xdr, arg->fmode);
1213
	p = reserve_space(xdr, 28);
B
Benny Halevy 已提交
1214
	p = xdr_encode_hyper(p, arg->clientid);
B
Benny Halevy 已提交
1215
	*p++ = cpu_to_be32(16);
B
Benny Halevy 已提交
1216
	p = xdr_encode_opaque_fixed(p, "open id:", 8);
1217
	xdr_encode_hyper(p, arg->id);
L
Linus Torvalds 已提交
1218 1219 1220 1221
}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1222
	__be32 *p;
1223
	struct nfs_client *clp;
L
Linus Torvalds 已提交
1224

1225
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1226
	switch(arg->open_flags & O_EXCL) {
A
Andy Adamson 已提交
1227
	case 0:
1228
		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
A
Andy Adamson 已提交
1229 1230 1231
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
1232
		clp = arg->server->nfs_client;
1233
		if (clp->cl_mvops->minor_version > 0) {
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
			if (nfs4_has_persistent_session(clp)) {
				*p = cpu_to_be32(NFS4_CREATE_GUARDED);
				encode_attrs(xdr, arg->u.attrs, arg->server);
			} else {
				struct iattr dummy;

				*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
				encode_nfs4_verifier(xdr, &arg->u.verifier);
				dummy.ia_valid = 0;
				encode_attrs(xdr, &dummy, arg->server);
			}
		} else {
			*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
			encode_nfs4_verifier(xdr, &arg->u.verifier);
		}
L
Linus Torvalds 已提交
1249 1250 1251 1252 1253
	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
A
Al Viro 已提交
1254
	__be32 *p;
L
Linus Torvalds 已提交
1255

1256
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1257
	switch (arg->open_flags & O_CREAT) {
A
Andy Adamson 已提交
1258
	case 0:
1259
		*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
A
Andy Adamson 已提交
1260 1261 1262
		break;
	default:
		BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1263
		*p = cpu_to_be32(NFS4_OPEN_CREATE);
A
Andy Adamson 已提交
1264
		encode_createmode(xdr, arg);
L
Linus Torvalds 已提交
1265 1266 1267
	}
}

1268
static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
L
Linus Torvalds 已提交
1269
{
A
Al Viro 已提交
1270
	__be32 *p;
L
Linus Torvalds 已提交
1271

1272
	p = reserve_space(xdr, 4);
L
Linus Torvalds 已提交
1273
	switch (delegation_type) {
A
Andy Adamson 已提交
1274
	case 0:
1275
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
A
Andy Adamson 已提交
1276 1277
		break;
	case FMODE_READ:
1278
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
A
Andy Adamson 已提交
1279 1280
		break;
	case FMODE_WRITE|FMODE_READ:
1281
		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
A
Andy Adamson 已提交
1282 1283 1284
		break;
	default:
		BUG();
L
Linus Torvalds 已提交
1285 1286 1287 1288 1289
	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
A
Al Viro 已提交
1290
	__be32 *p;
L
Linus Torvalds 已提交
1291

1292
	p = reserve_space(xdr, 4);
1293
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
L
Linus Torvalds 已提交
1294 1295 1296
	encode_string(xdr, name->len, name->name);
}

1297
static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
L
Linus Torvalds 已提交
1298
{
A
Al Viro 已提交
1299
	__be32 *p;
L
Linus Torvalds 已提交
1300

1301
	p = reserve_space(xdr, 4);
1302
	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
L
Linus Torvalds 已提交
1303 1304 1305 1306 1307
	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
A
Al Viro 已提交
1308
	__be32 *p;
L
Linus Torvalds 已提交
1309

1310
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1311
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1312
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1313 1314 1315
	encode_string(xdr, name->len, name->name);
}

1316
static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1317 1318 1319 1320
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
A
Andy Adamson 已提交
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
	case NFS4_OPEN_CLAIM_NULL:
		encode_claim_null(xdr, arg->name);
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		encode_claim_previous(xdr, arg->u.delegation_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
		break;
	default:
		BUG();
L
Linus Torvalds 已提交
1332
	}
1333
	hdr->nops++;
1334
	hdr->replen += decode_open_maxsz;
L
Linus Torvalds 已提交
1335 1336
}

1337
static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1338
{
A
Al Viro 已提交
1339
	__be32 *p;
L
Linus Torvalds 已提交
1340

1341
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1342
	*p++ = cpu_to_be32(OP_OPEN_CONFIRM);
B
Benny Halevy 已提交
1343
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1344
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1345
	hdr->nops++;
1346
	hdr->replen += decode_open_confirm_maxsz;
L
Linus Torvalds 已提交
1347 1348
}

1349
static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1350
{
A
Al Viro 已提交
1351
	__be32 *p;
L
Linus Torvalds 已提交
1352

1353
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
B
Benny Halevy 已提交
1354
	*p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
B
Benny Halevy 已提交
1355
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1356
	*p = cpu_to_be32(arg->seqid->sequence->counter);
1357
	encode_share_access(xdr, arg->fmode);
1358
	hdr->nops++;
1359
	hdr->replen += decode_open_downgrade_maxsz;
L
Linus Torvalds 已提交
1360 1361
}

1362
static void
1363
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1364 1365
{
	int len = fh->size;
A
Al Viro 已提交
1366
	__be32 *p;
L
Linus Torvalds 已提交
1367

1368
	p = reserve_space(xdr, 8 + len);
B
Benny Halevy 已提交
1369
	*p++ = cpu_to_be32(OP_PUTFH);
1370
	xdr_encode_opaque(p, fh->data, len);
1371
	hdr->nops++;
1372
	hdr->replen += decode_putfh_maxsz;
L
Linus Torvalds 已提交
1373 1374
}

1375
static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1376
{
A
Andy Adamson 已提交
1377
	__be32 *p;
1378

1379
	p = reserve_space(xdr, 4);
1380
	*p = cpu_to_be32(OP_PUTROOTFH);
1381
	hdr->nops++;
1382
	hdr->replen += decode_putrootfh_maxsz;
L
Linus Torvalds 已提交
1383 1384
}

1385
static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
L
Linus Torvalds 已提交
1386 1387
{
	nfs4_stateid stateid;
A
Al Viro 已提交
1388
	__be32 *p;
L
Linus Torvalds 已提交
1389

1390
	p = reserve_space(xdr, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1391
	if (ctx->state != NULL) {
1392
		nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1393
		xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1394
	} else
1395
		xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1396 1397
}

1398
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1399
{
A
Al Viro 已提交
1400
	__be32 *p;
L
Linus Torvalds 已提交
1401

1402
	p = reserve_space(xdr, 4);
1403
	*p = cpu_to_be32(OP_READ);
L
Linus Torvalds 已提交
1404

1405
	encode_stateid(xdr, args->context, args->lock_context);
L
Linus Torvalds 已提交
1406

1407
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1408
	p = xdr_encode_hyper(p, args->offset);
1409
	*p = cpu_to_be32(args->count);
1410
	hdr->nops++;
1411
	hdr->replen += decode_read_maxsz;
L
Linus Torvalds 已提交
1412 1413
}

1414
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1415
{
B
Bryan Schumaker 已提交
1416
	uint32_t attrs[2] = {0, 0};
1417
	uint32_t dircount = readdir->count >> 1;
A
Al Viro 已提交
1418
	__be32 *p;
L
Linus Torvalds 已提交
1419

B
Bryan Schumaker 已提交
1420 1421 1422 1423 1424 1425 1426
	if (readdir->plus) {
		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
		attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
			FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
			FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
			FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1427
		dircount >>= 1;
B
Bryan Schumaker 已提交
1428 1429 1430
	}
	attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
	attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431 1432 1433 1434 1435
	/* Switch to mounted_on_fileid if the server supports it */
	if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
		attrs[0] &= ~FATTR4_WORD0_FILEID;
	else
		attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
B
Bryan Schumaker 已提交
1436

1437
	p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
B
Benny Halevy 已提交
1438
	*p++ = cpu_to_be32(OP_READDIR);
B
Benny Halevy 已提交
1439
	p = xdr_encode_hyper(p, readdir->cookie);
B
Benny Halevy 已提交
1440
	p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1441
	*p++ = cpu_to_be32(dircount);
B
Benny Halevy 已提交
1442 1443
	*p++ = cpu_to_be32(readdir->count);
	*p++ = cpu_to_be32(2);
B
Bryan Schumaker 已提交
1444

B
Benny Halevy 已提交
1445
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446
	*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447
	hdr->nops++;
1448
	hdr->replen += decode_readdir_maxsz;
1449 1450
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
1451 1452 1453 1454 1455
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
L
Linus Torvalds 已提交
1456 1457
}

1458
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1459
{
A
Al Viro 已提交
1460
	__be32 *p;
L
Linus Torvalds 已提交
1461

1462
	p = reserve_space(xdr, 4);
1463
	*p = cpu_to_be32(OP_READLINK);
1464
	hdr->nops++;
1465
	hdr->replen += decode_readlink_maxsz;
L
Linus Torvalds 已提交
1466 1467
}

1468
static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1469
{
A
Al Viro 已提交
1470
	__be32 *p;
L
Linus Torvalds 已提交
1471

1472
	p = reserve_space(xdr, 8 + name->len);
B
Benny Halevy 已提交
1473
	*p++ = cpu_to_be32(OP_REMOVE);
1474
	xdr_encode_opaque(p, name->name, name->len);
1475
	hdr->nops++;
1476
	hdr->replen += decode_remove_maxsz;
L
Linus Torvalds 已提交
1477 1478
}

1479
static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1480
{
A
Al Viro 已提交
1481
	__be32 *p;
L
Linus Torvalds 已提交
1482

1483 1484 1485 1486
	p = reserve_space(xdr, 4);
	*p = cpu_to_be32(OP_RENAME);
	encode_string(xdr, oldname->len, oldname->name);
	encode_string(xdr, newname->len, newname->name);
1487
	hdr->nops++;
1488
	hdr->replen += decode_rename_maxsz;
L
Linus Torvalds 已提交
1489 1490
}

1491
static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1492
{
A
Al Viro 已提交
1493
	__be32 *p;
L
Linus Torvalds 已提交
1494

1495
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1496
	*p++ = cpu_to_be32(OP_RENEW);
1497
	xdr_encode_hyper(p, client_stateid->cl_clientid);
1498
	hdr->nops++;
1499
	hdr->replen += decode_renew_maxsz;
L
Linus Torvalds 已提交
1500 1501
}

1502
static void
1503
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504
{
A
Al Viro 已提交
1505
	__be32 *p;
1506

1507
	p = reserve_space(xdr, 4);
1508
	*p = cpu_to_be32(OP_RESTOREFH);
1509
	hdr->nops++;
1510
	hdr->replen += decode_restorefh_maxsz;
1511 1512
}

1513
static void
1514
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1515
{
A
Al Viro 已提交
1516
	__be32 *p;
1517

1518
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1519
	*p++ = cpu_to_be32(OP_SETATTR);
1520
	xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521
	p = reserve_space(xdr, 2*4);
B
Benny Halevy 已提交
1522
	*p++ = cpu_to_be32(1);
1523
	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1524
	BUG_ON(arg->acl_len % 4);
1525
	p = reserve_space(xdr, 4);
1526
	*p = cpu_to_be32(arg->acl_len);
1527
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1528
	hdr->nops++;
1529
	hdr->replen += decode_setacl_maxsz;
1530 1531
}

1532
static void
1533
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1534
{
A
Al Viro 已提交
1535
	__be32 *p;
L
Linus Torvalds 已提交
1536

1537
	p = reserve_space(xdr, 4);
1538
	*p = cpu_to_be32(OP_SAVEFH);
1539
	hdr->nops++;
1540
	hdr->replen += decode_savefh_maxsz;
L
Linus Torvalds 已提交
1541 1542
}

1543
static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1544
{
A
Al Viro 已提交
1545
	__be32 *p;
1546

1547
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
B
Benny Halevy 已提交
1548
	*p++ = cpu_to_be32(OP_SETATTR);
1549
	xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1550
	hdr->nops++;
1551
	hdr->replen += decode_setattr_maxsz;
1552
	encode_attrs(xdr, arg->iap, server);
L
Linus Torvalds 已提交
1553 1554
}

1555
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1556
{
A
Al Viro 已提交
1557
	__be32 *p;
L
Linus Torvalds 已提交
1558

1559
	p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1560
	*p++ = cpu_to_be32(OP_SETCLIENTID);
1561
	xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1562 1563

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1564
	p = reserve_space(xdr, 4);
1565
	*p = cpu_to_be32(setclientid->sc_prog);
L
Linus Torvalds 已提交
1566 1567
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1568
	p = reserve_space(xdr, 4);
1569
	*p = cpu_to_be32(setclientid->sc_cb_ident);
1570
	hdr->nops++;
1571
	hdr->replen += decode_setclientid_maxsz;
L
Linus Torvalds 已提交
1572 1573
}

1574
static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1575
{
A
Andy Adamson 已提交
1576
	__be32 *p;
L
Linus Torvalds 已提交
1577

1578
	p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
1579
	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1580 1581
	p = xdr_encode_hyper(p, arg->clientid);
	xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1582
	hdr->nops++;
1583
	hdr->replen += decode_setclientid_confirm_maxsz;
L
Linus Torvalds 已提交
1584 1585
}

1586
static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1587
{
A
Al Viro 已提交
1588
	__be32 *p;
L
Linus Torvalds 已提交
1589

1590
	p = reserve_space(xdr, 4);
1591
	*p = cpu_to_be32(OP_WRITE);
L
Linus Torvalds 已提交
1592

1593
	encode_stateid(xdr, args->context, args->lock_context);
L
Linus Torvalds 已提交
1594

1595
	p = reserve_space(xdr, 16);
B
Benny Halevy 已提交
1596
	p = xdr_encode_hyper(p, args->offset);
B
Benny Halevy 已提交
1597
	*p++ = cpu_to_be32(args->stable);
1598
	*p = cpu_to_be32(args->count);
L
Linus Torvalds 已提交
1599 1600

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1601
	hdr->nops++;
1602
	hdr->replen += decode_write_maxsz;
L
Linus Torvalds 已提交
1603 1604
}

1605
static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
L
Linus Torvalds 已提交
1606
{
A
Al Viro 已提交
1607
	__be32 *p;
L
Linus Torvalds 已提交
1608

1609
	p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
L
Linus Torvalds 已提交
1610

B
Benny Halevy 已提交
1611
	*p++ = cpu_to_be32(OP_DELEGRETURN);
1612
	xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1613
	hdr->nops++;
1614
	hdr->replen += decode_delegreturn_maxsz;
L
Linus Torvalds 已提交
1615
}
1616

B
Benny Halevy 已提交
1617
#if defined(CONFIG_NFS_V4_1)
1618
/* NFSv4.1 operations */
B
Benny Halevy 已提交
1619 1620 1621 1622 1623 1624
static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;

1625
	p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
B
Benny Halevy 已提交
1626
	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
1627
	xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
B
Benny Halevy 已提交
1628 1629 1630

	encode_string(xdr, args->id_len, args->id);

1631
	p = reserve_space(xdr, 12);
B
Benny Halevy 已提交
1632 1633
	*p++ = cpu_to_be32(args->flags);
	*p++ = cpu_to_be32(0);	/* zero length state_protect4_a */
1634
	*p = cpu_to_be32(0);	/* zero length implementation id array */
B
Benny Halevy 已提交
1635 1636 1637
	hdr->nops++;
	hdr->replen += decode_exchange_id_maxsz;
}
A
Andy Adamson 已提交
1638 1639 1640 1641 1642 1643 1644 1645 1646

static void encode_create_session(struct xdr_stream *xdr,
				  struct nfs41_create_session_args *args,
				  struct compound_hdr *hdr)
{
	__be32 *p;
	char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
	uint32_t len;
	struct nfs_client *clp = args->client;
1647 1648 1649 1650 1651 1652 1653 1654
	u32 max_resp_sz_cached;

	/*
	 * Assumes OPEN is the biggest non-idempotent compound.
	 * 2 is the verifier.
	 */
	max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
			      RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
A
Andy Adamson 已提交
1655

1656 1657
	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);
A
Andy Adamson 已提交
1658

1659
	p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1660
	*p++ = cpu_to_be32(OP_CREATE_SESSION);
B
Benny Halevy 已提交
1661
	p = xdr_encode_hyper(p, clp->cl_ex_clid);
B
Benny Halevy 已提交
1662 1663
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */
A
Andy Adamson 已提交
1664 1665

	/* Fore Channel */
B
Benny Halevy 已提交
1666 1667 1668
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz);	/* max resp size */
1669
	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
B
Benny Halevy 已提交
1670 1671 1672
	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
A
Andy Adamson 已提交
1673 1674

	/* Back Channel */
B
Benny Halevy 已提交
1675 1676 1677 1678 1679 1680 1681
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
A
Andy Adamson 已提交
1682

B
Benny Halevy 已提交
1683 1684 1685
	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
A
Andy Adamson 已提交
1686 1687

	/* authsys_parms rfc1831 */
B
Benny Halevy 已提交
1688
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
1689
	p = xdr_encode_opaque(p, machine_name, len);
B
Benny Halevy 已提交
1690 1691
	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
1692
	*p = cpu_to_be32(0);				/* No more gids */
A
Andy Adamson 已提交
1693 1694 1695
	hdr->nops++;
	hdr->replen += decode_create_session_maxsz;
}
A
Andy Adamson 已提交
1696 1697 1698 1699 1700 1701

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;
1702
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
B
Benny Halevy 已提交
1703
	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
1704
	xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
A
Andy Adamson 已提交
1705 1706 1707
	hdr->nops++;
	hdr->replen += decode_destroy_session_maxsz;
}
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720

static void encode_reclaim_complete(struct xdr_stream *xdr,
				    struct nfs41_reclaim_complete_args *args,
				    struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 8);
	*p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
	*p++ = cpu_to_be32(args->one_fs);
	hdr->nops++;
	hdr->replen += decode_reclaim_complete_maxsz;
}
B
Benny Halevy 已提交
1721 1722
#endif /* CONFIG_NFS_V4_1 */

1723 1724 1725 1726 1727 1728
static void encode_sequence(struct xdr_stream *xdr,
			    const struct nfs4_sequence_args *args,
			    struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
	struct nfs4_session *session = args->sa_session;
A
Andy Adamson 已提交
1729 1730 1731
	struct nfs4_slot_table *tp;
	struct nfs4_slot *slot;
	__be32 *p;
1732 1733 1734 1735

	if (!session)
		return;

A
Andy Adamson 已提交
1736 1737 1738 1739 1740
	tp = &session->fc_slot_table;

	WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
	slot = tp->slots + args->sa_slotid;

1741
	p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
B
Benny Halevy 已提交
1742
	*p++ = cpu_to_be32(OP_SEQUENCE);
A
Andy Adamson 已提交
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755

	/*
	 * Sessionid + seqid + slotid + max slotid + cache_this
	 */
	dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
		"max_slotid=%d cache_this=%d\n",
		__func__,
		((u32 *)session->sess_id.data)[0],
		((u32 *)session->sess_id.data)[1],
		((u32 *)session->sess_id.data)[2],
		((u32 *)session->sess_id.data)[3],
		slot->seq_nr, args->sa_slotid,
		tp->highest_used_slotid, args->sa_cache_this);
B
Benny Halevy 已提交
1756
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
B
Benny Halevy 已提交
1757 1758 1759
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
1760
	*p = cpu_to_be32(args->sa_cache_this);
1761 1762 1763 1764 1765
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799
#ifdef CONFIG_NFS_V4_1
static void
encode_getdeviceinfo(struct xdr_stream *xdr,
		     const struct nfs4_getdeviceinfo_args *args,
		     struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(OP_GETDEVICEINFO);
	p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
				    NFS4_DEVICEID4_SIZE);
	*p++ = cpu_to_be32(args->pdev->layout_type);
	*p++ = cpu_to_be32(args->pdev->pglen);		/* gdia_maxcount */
	*p++ = cpu_to_be32(0);				/* bitmap length 0 */
	hdr->nops++;
	hdr->replen += decode_getdeviceinfo_maxsz;
}

static void
encode_layoutget(struct xdr_stream *xdr,
		      const struct nfs4_layoutget_args *args,
		      struct compound_hdr *hdr)
{
	__be32 *p;

	p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(OP_LAYOUTGET);
	*p++ = cpu_to_be32(0);     /* Signal layout available */
	*p++ = cpu_to_be32(args->type);
	*p++ = cpu_to_be32(args->range.iomode);
	p = xdr_encode_hyper(p, args->range.offset);
	p = xdr_encode_hyper(p, args->range.length);
	p = xdr_encode_hyper(p, args->minlength);
1800
	p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
	*p = cpu_to_be32(args->maxcount);

	dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
		__func__,
		args->type,
		args->range.iomode,
		(unsigned long)args->range.offset,
		(unsigned long)args->range.length,
		args->maxcount);
	hdr->nops++;
	hdr->replen += decode_layoutget_maxsz;
}
#endif /* CONFIG_NFS_V4_1 */

L
Linus Torvalds 已提交
1815 1816 1817 1818
/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

1819 1820 1821 1822
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
1823
		return args->sa_session->clp->cl_mvops->minor_version;
1824 1825 1826 1827
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

L
Linus Torvalds 已提交
1828 1829 1830
/*
 * Encode an ACCESS request
 */
1831 1832
static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_accessargs *args)
L
Linus Torvalds 已提交
1833 1834
{
	struct compound_hdr hdr = {
1835
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1836 1837
	};

1838 1839 1840 1841 1842
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_access(xdr, args->access, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1843
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1844 1845 1846 1847 1848
}

/*
 * Encode LOOKUP request
 */
1849 1850
static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_lookup_arg *args)
L
Linus Torvalds 已提交
1851 1852
{
	struct compound_hdr hdr = {
1853
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1854 1855
	};

1856 1857 1858 1859 1860 1861
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1862
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1863 1864 1865 1866 1867
}

/*
 * Encode LOOKUP_ROOT request
 */
1868 1869 1870
static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_lookup_root_arg *args)
L
Linus Torvalds 已提交
1871 1872
{
	struct compound_hdr hdr = {
1873
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1874 1875
	};

1876 1877 1878 1879 1880
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1881
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1882 1883 1884 1885 1886
}

/*
 * Encode REMOVE request
 */
1887 1888
static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_removeargs *args)
L
Linus Torvalds 已提交
1889 1890
{
	struct compound_hdr hdr = {
1891
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1892 1893
	};

1894 1895 1896 1897 1898
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_remove(xdr, &args->name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1899
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1900 1901 1902 1903 1904
}

/*
 * Encode RENAME request
 */
1905 1906
static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs_renameargs *args)
L
Linus Torvalds 已提交
1907 1908
{
	struct compound_hdr hdr = {
1909
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1910 1911
	};

1912 1913 1914 1915 1916 1917 1918 1919 1920
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->old_dir, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->new_dir, &hdr);
	encode_rename(xdr, args->old_name, args->new_name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1921
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1922 1923 1924 1925 1926
}

/*
 * Encode LINK request
 */
1927 1928
static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
			     const struct nfs4_link_arg *args)
L
Linus Torvalds 已提交
1929 1930
{
	struct compound_hdr hdr = {
1931
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1932 1933
	};

1934 1935 1936 1937 1938 1939 1940 1941 1942
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_link(xdr, args->name, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1943
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1944 1945 1946 1947 1948
}

/*
 * Encode CREATE request
 */
1949 1950
static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1951 1952
{
	struct compound_hdr hdr = {
1953
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1954 1955
	};

1956 1957 1958 1959 1960 1961 1962 1963 1964
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_create(xdr, args, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1965
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1966 1967 1968 1969 1970
}

/*
 * Encode SYMLINK request
 */
1971 1972
static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_create_arg *args)
L
Linus Torvalds 已提交
1973
{
1974
	nfs4_xdr_enc_create(req, xdr, args);
L
Linus Torvalds 已提交
1975 1976 1977 1978 1979
}

/*
 * Encode GETATTR request
 */
1980 1981
static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_getattr_arg *args)
L
Linus Torvalds 已提交
1982 1983
{
	struct compound_hdr hdr = {
1984
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
1985 1986
	};

1987 1988 1989 1990
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
1991
	encode_nops(&hdr);
L
Linus Torvalds 已提交
1992 1993 1994 1995 1996
}

/*
 * Encode a CLOSE request
 */
1997 1998
static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_closeargs *args)
L
Linus Torvalds 已提交
1999
{
A
Andy Adamson 已提交
2000
	struct compound_hdr hdr = {
2001
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2002 2003
	};

2004 2005 2006 2007 2008
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_close(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2009
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2010 2011 2012 2013 2014
}

/*
 * Encode an OPEN request
 */
2015 2016
static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_openargs *args)
L
Linus Torvalds 已提交
2017 2018
{
	struct compound_hdr hdr = {
2019
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2020 2021
	};

2022 2023 2024 2025 2026 2027 2028 2029 2030
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_savefh(xdr, &hdr);
	encode_open(xdr, args, &hdr);
	encode_getfh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
	encode_restorefh(xdr, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2031
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2032 2033 2034 2035 2036
}

/*
 * Encode an OPEN_CONFIRM request
 */
2037 2038 2039
static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs_open_confirmargs *args)
L
Linus Torvalds 已提交
2040 2041
{
	struct compound_hdr hdr = {
2042
		.nops   = 0,
L
Linus Torvalds 已提交
2043 2044
	};

2045 2046 2047
	encode_compound_hdr(xdr, req, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_confirm(xdr, args, &hdr);
2048
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2049 2050 2051 2052 2053
}

/*
 * Encode an OPEN request with no attributes.
 */
2054 2055 2056
static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs_openargs *args)
L
Linus Torvalds 已提交
2057 2058
{
	struct compound_hdr hdr = {
2059
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2060 2061
	};

2062 2063 2064 2065 2066
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2067
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2068 2069 2070 2071 2072
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
2073 2074 2075
static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs_closeargs *args)
L
Linus Torvalds 已提交
2076 2077
{
	struct compound_hdr hdr = {
2078
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2079 2080
	};

2081 2082 2083 2084 2085
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_open_downgrade(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2086
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2087 2088 2089 2090 2091
}

/*
 * Encode a LOCK request
 */
2092 2093
static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_lock_args *args)
L
Linus Torvalds 已提交
2094 2095
{
	struct compound_hdr hdr = {
2096
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2097 2098
	};

2099 2100 2101 2102
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lock(xdr, args, &hdr);
2103
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2104 2105 2106 2107 2108
}

/*
 * Encode a LOCKT request
 */
2109 2110
static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_lockt_args *args)
L
Linus Torvalds 已提交
2111 2112
{
	struct compound_hdr hdr = {
2113
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2114 2115
	};

2116 2117 2118 2119
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_lockt(xdr, args, &hdr);
2120
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2121 2122 2123 2124 2125
}

/*
 * Encode a LOCKU request
 */
2126 2127
static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_locku_args *args)
L
Linus Torvalds 已提交
2128 2129
{
	struct compound_hdr hdr = {
2130
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2131 2132
	};

2133 2134 2135 2136
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_locku(xdr, args, &hdr);
2137
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2138 2139
}

2140 2141 2142
static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
					   struct xdr_stream *xdr,
					struct nfs_release_lockowner_args *args)
2143 2144 2145 2146 2147
{
	struct compound_hdr hdr = {
		.minorversion = 0,
	};

2148 2149
	encode_compound_hdr(xdr, req, &hdr);
	encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2150 2151 2152
	encode_nops(&hdr);
}

L
Linus Torvalds 已提交
2153 2154 2155
/*
 * Encode a READLINK request
 */
2156 2157
static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_readlink *args)
L
Linus Torvalds 已提交
2158 2159
{
	struct compound_hdr hdr = {
2160
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2161 2162
	};

2163 2164 2165 2166
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readlink(xdr, args, req, &hdr);
2167

2168
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2169
			args->pgbase, args->pglen);
2170
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2171 2172 2173 2174 2175
}

/*
 * Encode a READDIR request
 */
2176 2177
static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
				 const struct nfs4_readdir_arg *args)
L
Linus Torvalds 已提交
2178 2179
{
	struct compound_hdr hdr = {
2180
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2181 2182
	};

2183 2184 2185 2186
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_readdir(xdr, args, req, &hdr);
2187

2188
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2189 2190
			 args->pgbase, args->count);
	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2191
			__func__, hdr.replen << 2, args->pages,
2192
			args->pgbase, args->count);
2193
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2194 2195 2196 2197 2198
}

/*
 * Encode a READ request
 */
2199 2200
static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
			      struct nfs_readargs *args)
L
Linus Torvalds 已提交
2201 2202
{
	struct compound_hdr hdr = {
2203
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2204 2205
	};

2206 2207 2208 2209
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_read(xdr, args, &hdr);
L
Linus Torvalds 已提交
2210

2211
	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
L
Linus Torvalds 已提交
2212
			 args->pages, args->pgbase, args->count);
2213
	req->rq_rcv_buf.flags |= XDRBUF_READ;
2214
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2215 2216 2217 2218 2219
}

/*
 * Encode an SETATTR request
 */
2220 2221
static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
				 struct nfs_setattrargs *args)
L
Linus Torvalds 已提交
2222
{
A
Andy Adamson 已提交
2223
	struct compound_hdr hdr = {
2224
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
2225 2226
	};

2227 2228 2229 2230 2231
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setattr(xdr, args, args->server, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2232
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2233 2234
}

2235 2236 2237
/*
 * Encode a GETACL request
 */
2238 2239
static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_getaclargs *args)
2240 2241
{
	struct compound_hdr hdr = {
2242
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243
	};
2244
	uint32_t replen;
2245

2246 2247 2248
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
2249
	replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2250
	encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2251

2252
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2253
		args->acl_pages, args->acl_pgbase, args->acl_len);
2254
	encode_nops(&hdr);
2255 2256
}

L
Linus Torvalds 已提交
2257 2258 2259
/*
 * Encode a WRITE request
 */
2260 2261
static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2262 2263
{
	struct compound_hdr hdr = {
2264
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2265 2266
	};

2267 2268 2269 2270
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_write(xdr, args, &hdr);
2271
	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2272
	encode_getfattr(xdr, args->bitmask, &hdr);
2273
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2274 2275 2276 2277 2278
}

/*
 *  a COMMIT request
 */
2279 2280
static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_writeargs *args)
L
Linus Torvalds 已提交
2281 2282
{
	struct compound_hdr hdr = {
2283
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2284 2285
	};

2286 2287 2288 2289 2290
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_commit(xdr, args, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2291
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2292 2293 2294 2295 2296
}

/*
 * FSINFO request
 */
2297 2298
static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs4_fsinfo_arg *args)
L
Linus Torvalds 已提交
2299 2300
{
	struct compound_hdr hdr = {
2301
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2302 2303
	};

2304 2305 2306 2307
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_fsinfo(xdr, args->bitmask, &hdr);
2308
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2309 2310 2311 2312 2313
}

/*
 * a PATHCONF request
 */
2314 2315
static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
				  const struct nfs4_pathconf_arg *args)
L
Linus Torvalds 已提交
2316 2317
{
	struct compound_hdr hdr = {
2318
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2319 2320
	};

2321 2322 2323 2324
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2325
			   &hdr);
2326
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2327 2328 2329 2330 2331
}

/*
 * a STATFS request
 */
2332 2333
static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
				const struct nfs4_statfs_arg *args)
L
Linus Torvalds 已提交
2334 2335
{
	struct compound_hdr hdr = {
2336
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2337 2338
	};

2339 2340 2341 2342
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2343
			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2344
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2345 2346 2347 2348 2349
}

/*
 * GETATTR_BITMAP request
 */
2350 2351 2352
static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_server_caps_arg *args)
L
Linus Torvalds 已提交
2353 2354
{
	struct compound_hdr hdr = {
2355
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2356 2357
	};

2358 2359 2360 2361
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2362 2363 2364
			   FATTR4_WORD0_LINK_SUPPORT|
			   FATTR4_WORD0_SYMLINK_SUPPORT|
			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2365
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2366 2367 2368 2369 2370
}

/*
 * a RENEW request
 */
2371 2372
static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
			       struct nfs_client *clp)
L
Linus Torvalds 已提交
2373 2374
{
	struct compound_hdr hdr = {
2375
		.nops	= 0,
L
Linus Torvalds 已提交
2376 2377
	};

2378 2379
	encode_compound_hdr(xdr, req, &hdr);
	encode_renew(xdr, clp, &hdr);
2380
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2381 2382 2383 2384 2385
}

/*
 * a SETCLIENTID request
 */
2386 2387 2388
static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs4_setclientid *sc)
L
Linus Torvalds 已提交
2389 2390
{
	struct compound_hdr hdr = {
2391
		.nops	= 0,
L
Linus Torvalds 已提交
2392 2393
	};

2394 2395
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid(xdr, sc, &hdr);
2396
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2397 2398 2399 2400 2401
}

/*
 * a SETCLIENTID_CONFIRM request
 */
2402 2403 2404
static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
					     struct xdr_stream *xdr,
					     struct nfs4_setclientid_res *arg)
L
Linus Torvalds 已提交
2405 2406
{
	struct compound_hdr hdr = {
2407
		.nops	= 0,
L
Linus Torvalds 已提交
2408 2409 2410
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

2411 2412 2413 2414
	encode_compound_hdr(xdr, req, &hdr);
	encode_setclientid_confirm(xdr, arg, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_fsinfo(xdr, lease_bitmap, &hdr);
2415
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2416 2417 2418 2419 2420
}

/*
 * DELEGRETURN request
 */
2421 2422 2423
static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     const struct nfs4_delegreturnargs *args)
L
Linus Torvalds 已提交
2424 2425
{
	struct compound_hdr hdr = {
2426
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
L
Linus Torvalds 已提交
2427 2428
	};

2429 2430 2431 2432 2433
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fhandle, &hdr);
	encode_delegreturn(xdr, args->stateid, &hdr);
	encode_getfattr(xdr, args->bitmask, &hdr);
2434
	encode_nops(&hdr);
L
Linus Torvalds 已提交
2435 2436
}

2437 2438 2439
/*
 * Encode FS_LOCATIONS request
 */
2440 2441 2442
static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
				      struct xdr_stream *xdr,
				      struct nfs4_fs_locations_arg *args)
2443 2444
{
	struct compound_hdr hdr = {
2445
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2446
	};
2447
	uint32_t replen;
2448

2449 2450 2451 2452
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->dir_fh, &hdr);
	encode_lookup(xdr, args->name, &hdr);
2453
	replen = hdr.replen;	/* get the attribute into args->page */
2454
	encode_fs_locations(xdr, args->bitmask, &hdr);
2455

2456
	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2457
			0, PAGE_SIZE);
2458
	encode_nops(&hdr);
2459 2460
}

B
Benny Halevy 已提交
2461 2462 2463 2464
#if defined(CONFIG_NFS_V4_1)
/*
 * EXCHANGE_ID request
 */
2465 2466 2467
static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
				     struct nfs41_exchange_id_args *args)
B
Benny Halevy 已提交
2468 2469
{
	struct compound_hdr hdr = {
2470
		.minorversion = args->client->cl_mvops->minor_version,
B
Benny Halevy 已提交
2471 2472
	};

2473 2474
	encode_compound_hdr(xdr, req, &hdr);
	encode_exchange_id(xdr, args, &hdr);
B
Benny Halevy 已提交
2475 2476
	encode_nops(&hdr);
}
A
Andy Adamson 已提交
2477

A
Andy Adamson 已提交
2478 2479 2480
/*
 * a CREATE_SESSION request
 */
2481 2482 2483
static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs41_create_session_args *args)
A
Andy Adamson 已提交
2484 2485
{
	struct compound_hdr hdr = {
2486
		.minorversion = args->client->cl_mvops->minor_version,
A
Andy Adamson 已提交
2487 2488
	};

2489 2490
	encode_compound_hdr(xdr, req, &hdr);
	encode_create_session(xdr, args, &hdr);
A
Andy Adamson 已提交
2491 2492 2493
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2494 2495 2496
/*
 * a DESTROY_SESSION request
 */
2497 2498 2499
static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
					 struct xdr_stream *xdr,
					 struct nfs4_session *session)
A
Andy Adamson 已提交
2500 2501
{
	struct compound_hdr hdr = {
2502
		.minorversion = session->clp->cl_mvops->minor_version,
A
Andy Adamson 已提交
2503 2504
	};

2505 2506
	encode_compound_hdr(xdr, req, &hdr);
	encode_destroy_session(xdr, session, &hdr);
A
Andy Adamson 已提交
2507 2508 2509
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2510 2511 2512
/*
 * a SEQUENCE request
 */
2513 2514
static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
				  struct nfs4_sequence_args *args)
A
Andy Adamson 已提交
2515 2516 2517 2518 2519
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(args),
	};

2520 2521
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, args, &hdr);
A
Andy Adamson 已提交
2522 2523 2524
	encode_nops(&hdr);
}

A
Andy Adamson 已提交
2525 2526 2527
/*
 * a GET_LEASE_TIME request
 */
2528 2529 2530
static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
					struct xdr_stream *xdr,
					struct nfs4_get_lease_time_args *args)
A
Andy Adamson 已提交
2531 2532 2533 2534 2535 2536
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
	};
	const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };

2537 2538 2539 2540
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->la_seq_args, &hdr);
	encode_putrootfh(xdr, &hdr);
	encode_fsinfo(xdr, lease_bitmap, &hdr);
A
Andy Adamson 已提交
2541 2542
	encode_nops(&hdr);
}
2543 2544 2545 2546

/*
 * a RECLAIM_COMPLETE request
 */
2547 2548 2549
static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
					  struct xdr_stream *xdr,
				struct nfs41_reclaim_complete_args *args)
2550 2551 2552 2553 2554
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
	};

2555 2556 2557
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_reclaim_complete(xdr, args, &hdr);
2558 2559 2560
	encode_nops(&hdr);
}

2561 2562 2563
/*
 * Encode GETDEVICEINFO request
 */
2564 2565 2566
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
				       struct xdr_stream *xdr,
				       struct nfs4_getdeviceinfo_args *args)
2567 2568 2569 2570 2571
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2572 2573 2574
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_getdeviceinfo(xdr, args, &hdr);
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587

	/* set up reply kvec. Subtract notification bitmap max size (2)
	 * so that notification bitmap is put in xdr_buf tail */
	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
			 args->pdev->pages, args->pdev->pgbase,
			 args->pdev->pglen);

	encode_nops(&hdr);
}

/*
 *  Encode LAYOUTGET request
 */
2588 2589 2590
static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
				   struct xdr_stream *xdr,
				   struct nfs4_layoutget_args *args)
2591 2592 2593 2594 2595
{
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

2596 2597 2598 2599
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
	encode_layoutget(xdr, args, &hdr);
2600 2601
	encode_nops(&hdr);
}
B
Benny Halevy 已提交
2602 2603
#endif /* CONFIG_NFS_V4_1 */

2604 2605 2606 2607 2608 2609
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
{
	dprintk("nfs: %s: prematurely hit end of receive buffer. "
		"Remaining buffer length is %tu words.\n",
		func, xdr->end - xdr->p);
}
L
Linus Torvalds 已提交
2610

2611
static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
L
Linus Torvalds 已提交
2612
{
A
Al Viro 已提交
2613
	__be32 *p;
L
Linus Torvalds 已提交
2614

B
Benny Halevy 已提交
2615 2616 2617
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2618
	*len = be32_to_cpup(p);
B
Benny Halevy 已提交
2619 2620 2621
	p = xdr_inline_decode(xdr, *len);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2622 2623
	*string = (char *)p;
	return 0;
B
Benny Halevy 已提交
2624 2625 2626
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2627 2628 2629 2630
}

static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
A
Al Viro 已提交
2631
	__be32 *p;
L
Linus Torvalds 已提交
2632

B
Benny Halevy 已提交
2633 2634 2635
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2636
	hdr->status = be32_to_cpup(p++);
2637
	hdr->taglen = be32_to_cpup(p);
2638

B
Benny Halevy 已提交
2639 2640 2641
	p = xdr_inline_decode(xdr, hdr->taglen + 4);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2642 2643
	hdr->tag = (char *)p;
	p += XDR_QUADLEN(hdr->taglen);
2644
	hdr->nops = be32_to_cpup(p);
2645 2646
	if (unlikely(hdr->nops < 1))
		return nfs4_stat_to_errno(hdr->status);
L
Linus Torvalds 已提交
2647
	return 0;
B
Benny Halevy 已提交
2648 2649 2650
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2651 2652 2653 2654
}

static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
{
A
Al Viro 已提交
2655
	__be32 *p;
L
Linus Torvalds 已提交
2656 2657 2658
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
2659 2660 2661
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
2662
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2663
	if (opnum != expected) {
2664 2665
		dprintk("nfs: Server returned operation"
			" %d but we issued a request for %d\n",
L
Linus Torvalds 已提交
2666 2667 2668
				opnum, expected);
		return -EIO;
	}
2669
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
2670
	if (nfserr != NFS_OK)
2671
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
2672
	return 0;
B
Benny Halevy 已提交
2673 2674 2675
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2676 2677 2678
}

/* Dummy routine */
2679
static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
L
Linus Torvalds 已提交
2680
{
A
Al Viro 已提交
2681
	__be32 *p;
2682
	unsigned int strlen;
L
Linus Torvalds 已提交
2683 2684
	char *str;

B
Benny Halevy 已提交
2685 2686 2687 2688 2689
	p = xdr_inline_decode(xdr, 12);
	if (likely(p))
		return decode_opaque_inline(xdr, &strlen, &str);
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2690 2691 2692 2693
}

static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
{
A
Al Viro 已提交
2694 2695
	uint32_t bmlen;
	__be32 *p;
L
Linus Torvalds 已提交
2696

B
Benny Halevy 已提交
2697 2698 2699
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2700
	bmlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2701 2702

	bitmap[0] = bitmap[1] = 0;
B
Benny Halevy 已提交
2703 2704 2705
	p = xdr_inline_decode(xdr, (bmlen << 2));
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
2706
	if (bmlen > 0) {
B
Benny Halevy 已提交
2707
		bitmap[0] = be32_to_cpup(p++);
L
Linus Torvalds 已提交
2708
		if (bmlen > 1)
2709
			bitmap[1] = be32_to_cpup(p);
L
Linus Torvalds 已提交
2710 2711
	}
	return 0;
B
Benny Halevy 已提交
2712 2713 2714
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2715 2716
}

A
Al Viro 已提交
2717
static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
L
Linus Torvalds 已提交
2718
{
A
Al Viro 已提交
2719
	__be32 *p;
L
Linus Torvalds 已提交
2720

B
Benny Halevy 已提交
2721 2722 2723
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
2724
	*attrlen = be32_to_cpup(p);
L
Linus Torvalds 已提交
2725 2726
	*savep = xdr->p;
	return 0;
B
Benny Halevy 已提交
2727 2728 2729
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2730 2731 2732 2733 2734
}

static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
R
Roman Borisov 已提交
2735 2736 2737 2738
		int ret;
		ret = decode_attr_bitmap(xdr, bitmask);
		if (unlikely(ret < 0))
			return ret;
L
Linus Torvalds 已提交
2739 2740 2741
		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
	} else
		bitmask[0] = bitmask[1] = 0;
2742
	dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
L
Linus Torvalds 已提交
2743 2744 2745 2746 2747
	return 0;
}

static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
{
A
Al Viro 已提交
2748
	__be32 *p;
2749
	int ret = 0;
L
Linus Torvalds 已提交
2750 2751 2752 2753 2754

	*type = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
B
Benny Halevy 已提交
2755 2756 2757
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2758
		*type = be32_to_cpup(p);
L
Linus Torvalds 已提交
2759
		if (*type < NF4REG || *type > NF4NAMEDATTR) {
2760
			dprintk("%s: bad type %d\n", __func__, *type);
L
Linus Torvalds 已提交
2761 2762 2763
			return -EIO;
		}
		bitmap[0] &= ~FATTR4_WORD0_TYPE;
2764
		ret = NFS_ATTR_FATTR_TYPE;
L
Linus Torvalds 已提交
2765
	}
2766
	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2767
	return ret;
B
Benny Halevy 已提交
2768 2769 2770
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2771 2772 2773 2774
}

static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
{
A
Al Viro 已提交
2775
	__be32 *p;
2776
	int ret = 0;
L
Linus Torvalds 已提交
2777 2778 2779 2780 2781

	*change = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
B
Benny Halevy 已提交
2782 2783 2784
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2785
		xdr_decode_hyper(p, change);
L
Linus Torvalds 已提交
2786
		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2787
		ret = NFS_ATTR_FATTR_CHANGE;
L
Linus Torvalds 已提交
2788
	}
2789
	dprintk("%s: change attribute=%Lu\n", __func__,
L
Linus Torvalds 已提交
2790
			(unsigned long long)*change);
2791
	return ret;
B
Benny Halevy 已提交
2792 2793 2794
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2795 2796 2797 2798
}

static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
{
A
Al Viro 已提交
2799
	__be32 *p;
2800
	int ret = 0;
L
Linus Torvalds 已提交
2801 2802 2803 2804 2805

	*size = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
B
Benny Halevy 已提交
2806 2807 2808
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2809
		xdr_decode_hyper(p, size);
L
Linus Torvalds 已提交
2810
		bitmap[0] &= ~FATTR4_WORD0_SIZE;
2811
		ret = NFS_ATTR_FATTR_SIZE;
L
Linus Torvalds 已提交
2812
	}
2813
	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2814
	return ret;
B
Benny Halevy 已提交
2815 2816 2817
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2818 2819 2820 2821
}

static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2822
	__be32 *p;
L
Linus Torvalds 已提交
2823 2824 2825 2826 2827

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
B
Benny Halevy 已提交
2828 2829 2830
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2831
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2832 2833
		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
	}
2834
	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2835
	return 0;
B
Benny Halevy 已提交
2836 2837 2838
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2839 2840 2841 2842
}

static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2843
	__be32 *p;
L
Linus Torvalds 已提交
2844 2845 2846 2847 2848

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
B
Benny Halevy 已提交
2849 2850 2851
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2852
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2853 2854
		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
	}
2855
	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
L
Linus Torvalds 已提交
2856
	return 0;
B
Benny Halevy 已提交
2857 2858 2859
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2860 2861
}

2862
static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
L
Linus Torvalds 已提交
2863
{
A
Al Viro 已提交
2864
	__be32 *p;
2865
	int ret = 0;
L
Linus Torvalds 已提交
2866 2867 2868 2869 2870 2871

	fsid->major = 0;
	fsid->minor = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
B
Benny Halevy 已提交
2872 2873 2874
		p = xdr_inline_decode(xdr, 16);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
2875
		p = xdr_decode_hyper(p, &fsid->major);
2876
		xdr_decode_hyper(p, &fsid->minor);
L
Linus Torvalds 已提交
2877
		bitmap[0] &= ~FATTR4_WORD0_FSID;
2878
		ret = NFS_ATTR_FATTR_FSID;
L
Linus Torvalds 已提交
2879
	}
2880
	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
L
Linus Torvalds 已提交
2881 2882
			(unsigned long long)fsid->major,
			(unsigned long long)fsid->minor);
2883
	return ret;
B
Benny Halevy 已提交
2884 2885 2886
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2887 2888 2889 2890
}

static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2891
	__be32 *p;
L
Linus Torvalds 已提交
2892 2893 2894 2895 2896

	*res = 60;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
B
Benny Halevy 已提交
2897 2898 2899
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2900
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2901 2902
		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
	}
2903
	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2904
	return 0;
B
Benny Halevy 已提交
2905 2906 2907
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2908 2909
}

2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
{
	__be32 *p;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
{
	__be32 *p;
	int len;

2933 2934
	if (fh != NULL)
		memset(fh, 0, sizeof(*fh));
2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		len = be32_to_cpup(p);
		if (len > NFS4_FHSIZE)
			return -EIO;
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
2948 2949 2950 2951
		if (fh != NULL) {
			memcpy(fh->data, p, len);
			fh->size = len;
		}
2952 2953 2954 2955 2956 2957 2958 2959
		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

L
Linus Torvalds 已提交
2960 2961
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
2962
	__be32 *p;
L
Linus Torvalds 已提交
2963 2964 2965 2966 2967

	*res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
B
Benny Halevy 已提交
2968 2969 2970
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
2971
		*res = be32_to_cpup(p);
L
Linus Torvalds 已提交
2972 2973
		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
	}
2974
	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
L
Linus Torvalds 已提交
2975
	return 0;
B
Benny Halevy 已提交
2976 2977 2978
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
2979 2980 2981 2982
}

static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
2983
	__be32 *p;
2984
	int ret = 0;
L
Linus Torvalds 已提交
2985 2986 2987 2988 2989

	*fileid = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
B
Benny Halevy 已提交
2990 2991 2992
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
2993
		xdr_decode_hyper(p, fileid);
L
Linus Torvalds 已提交
2994
		bitmap[0] &= ~FATTR4_WORD0_FILEID;
2995
		ret = NFS_ATTR_FATTR_FILEID;
L
Linus Torvalds 已提交
2996
	}
2997
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2998
	return ret;
B
Benny Halevy 已提交
2999 3000 3001
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3002 3003
}

3004 3005
static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
{
A
Al Viro 已提交
3006
	__be32 *p;
3007
	int ret = 0;
3008 3009 3010 3011 3012

	*fileid = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
B
Benny Halevy 已提交
3013 3014 3015
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3016
		xdr_decode_hyper(p, fileid);
3017
		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3018
		ret = NFS_ATTR_FATTR_FILEID;
3019
	}
3020
	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3021
	return ret;
B
Benny Halevy 已提交
3022 3023 3024
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3025 3026
}

L
Linus Torvalds 已提交
3027 3028
static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3029
	__be32 *p;
L
Linus Torvalds 已提交
3030 3031 3032 3033 3034 3035
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
B
Benny Halevy 已提交
3036 3037 3038
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3039
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3040 3041
		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
	}
3042
	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3043
	return status;
B
Benny Halevy 已提交
3044 3045 3046
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3047 3048 3049 3050
}

static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3051
	__be32 *p;
L
Linus Torvalds 已提交
3052 3053 3054 3055 3056 3057
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
B
Benny Halevy 已提交
3058 3059 3060
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3061
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3062 3063
		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
	}
3064
	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3065
	return status;
B
Benny Halevy 已提交
3066 3067 3068
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3069 3070 3071 3072
}

static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3073
	__be32 *p;
L
Linus Torvalds 已提交
3074 3075 3076 3077 3078 3079
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
B
Benny Halevy 已提交
3080 3081 3082
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3083
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3084 3085
		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
	}
3086
	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3087
	return status;
B
Benny Halevy 已提交
3088 3089 3090
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3091 3092
}

3093 3094
static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
{
3095
	u32 n;
A
Al Viro 已提交
3096
	__be32 *p;
3097 3098
	int status = 0;

B
Benny Halevy 已提交
3099 3100 3101
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3102
	n = be32_to_cpup(p);
3103 3104
	if (n == 0)
		goto root_path;
3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124
	dprintk("path ");
	path->ncomponents = 0;
	while (path->ncomponents < n) {
		struct nfs4_string *component = &path->components[path->ncomponents];
		status = decode_opaque_inline(xdr, &component->len, &component->data);
		if (unlikely(status != 0))
			goto out_eio;
		if (path->ncomponents != n)
			dprintk("/");
		dprintk("%s", component->data);
		if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
			path->ncomponents++;
		else {
			dprintk("cannot parse %d components in path\n", n);
			goto out_eio;
		}
	}
out:
	dprintk("\n");
	return status;
3125 3126 3127 3128 3129 3130 3131
root_path:
/* a root pathname is sent as a zero component4 */
	path->ncomponents = 1;
	path->components[0].len=0;
	path->components[0].data=NULL;
	dprintk("path /\n");
	goto out;
3132 3133 3134 3135
out_eio:
	dprintk(" status %d", status);
	status = -EIO;
	goto out;
B
Benny Halevy 已提交
3136 3137 3138
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
3139 3140 3141
}

static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3142 3143
{
	int n;
A
Al Viro 已提交
3144
	__be32 *p;
3145 3146 3147 3148 3149 3150 3151
	int status = -EIO;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
		goto out;
	status = 0;
	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
		goto out;
3152
	dprintk("%s: fsroot ", __func__);
3153
	status = decode_pathname(xdr, &res->fs_path);
3154 3155
	if (unlikely(status != 0))
		goto out;
B
Benny Halevy 已提交
3156 3157 3158
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3159
	n = be32_to_cpup(p);
3160 3161 3162 3163
	if (n <= 0)
		goto out_eio;
	res->nlocations = 0;
	while (res->nlocations < n) {
3164
		u32 m;
3165
		struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3166

B
Benny Halevy 已提交
3167 3168 3169
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3170
		m = be32_to_cpup(p);
3171 3172

		loc->nservers = 0;
3173
		dprintk("%s: servers ", __func__);
3174 3175 3176 3177 3178 3179 3180 3181 3182
		while (loc->nservers < m) {
			struct nfs4_string *server = &loc->servers[loc->nservers];
			status = decode_opaque_inline(xdr, &server->len, &server->data);
			if (unlikely(status != 0))
				goto out_eio;
			dprintk("%s ", server->data);
			if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
				loc->nservers++;
			else {
3183 3184 3185
				unsigned int i;
				dprintk("%s: using first %u of %u servers "
					"returned for location %u\n",
3186
						__func__,
3187 3188
						NFS4_FS_LOCATION_MAXSERVERS,
						m, res->nlocations);
3189
				for (i = loc->nservers; i < m; i++) {
T
Trond Myklebust 已提交
3190
					unsigned int len;
3191 3192 3193 3194 3195 3196 3197 3198
					char *data;
					status = decode_opaque_inline(xdr, &len, &data);
					if (unlikely(status != 0))
						goto out_eio;
				}
			}
		}
		status = decode_pathname(xdr, &loc->rootpath);
3199 3200
		if (unlikely(status != 0))
			goto out_eio;
3201
		if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3202 3203
			res->nlocations++;
	}
3204 3205
	if (res->nlocations != 0)
		status = NFS_ATTR_FATTR_V4_REFERRAL;
3206
out:
3207
	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3208
	return status;
B
Benny Halevy 已提交
3209 3210
out_overflow:
	print_overflow_msg(__func__, xdr);
3211 3212 3213 3214 3215
out_eio:
	status = -EIO;
	goto out;
}

L
Linus Torvalds 已提交
3216 3217
static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3218
	__be32 *p;
L
Linus Torvalds 已提交
3219 3220 3221 3222 3223 3224
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
B
Benny Halevy 已提交
3225 3226 3227
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3228
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3229 3230
		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
	}
3231
	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3232
	return status;
B
Benny Halevy 已提交
3233 3234 3235
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3236 3237 3238 3239
}

static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
{
A
Al Viro 已提交
3240
	__be32 *p;
L
Linus Torvalds 已提交
3241 3242 3243 3244 3245 3246
	int status = 0;

	*maxlink = 1;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
B
Benny Halevy 已提交
3247 3248 3249
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3250
		*maxlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3251 3252
		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
	}
3253
	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
L
Linus Torvalds 已提交
3254
	return status;
B
Benny Halevy 已提交
3255 3256 3257
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3258 3259 3260 3261
}

static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
{
A
Al Viro 已提交
3262
	__be32 *p;
L
Linus Torvalds 已提交
3263 3264 3265 3266 3267 3268
	int status = 0;

	*maxname = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
B
Benny Halevy 已提交
3269 3270 3271
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3272
		*maxname = be32_to_cpup(p);
L
Linus Torvalds 已提交
3273 3274
		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
	}
3275
	dprintk("%s: maxname=%u\n", __func__, *maxname);
L
Linus Torvalds 已提交
3276
	return status;
B
Benny Halevy 已提交
3277 3278 3279
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3280 3281 3282 3283
}

static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3284
	__be32 *p;
L
Linus Torvalds 已提交
3285 3286 3287 3288 3289 3290 3291
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
		uint64_t maxread;
B
Benny Halevy 已提交
3292 3293 3294
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3295
		xdr_decode_hyper(p, &maxread);
L
Linus Torvalds 已提交
3296 3297 3298 3299 3300
		if (maxread > 0x7FFFFFFF)
			maxread = 0x7FFFFFFF;
		*res = (uint32_t)maxread;
		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
	}
3301
	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3302
	return status;
B
Benny Halevy 已提交
3303 3304 3305
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3306 3307 3308 3309
}

static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
A
Al Viro 已提交
3310
	__be32 *p;
L
Linus Torvalds 已提交
3311 3312 3313 3314 3315 3316 3317
	int status = 0;

	*res = 1024;
	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
		uint64_t maxwrite;
B
Benny Halevy 已提交
3318 3319 3320
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3321
		xdr_decode_hyper(p, &maxwrite);
L
Linus Torvalds 已提交
3322 3323 3324 3325 3326
		if (maxwrite > 0x7FFFFFFF)
			maxwrite = 0x7FFFFFFF;
		*res = (uint32_t)maxwrite;
		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
	}
3327
	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
L
Linus Torvalds 已提交
3328
	return status;
B
Benny Halevy 已提交
3329 3330 3331
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3332 3333
}

3334
static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
L
Linus Torvalds 已提交
3335
{
3336
	uint32_t tmp;
A
Al Viro 已提交
3337
	__be32 *p;
3338
	int ret = 0;
L
Linus Torvalds 已提交
3339 3340 3341 3342 3343

	*mode = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
B
Benny Halevy 已提交
3344 3345 3346
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3347
		tmp = be32_to_cpup(p);
3348
		*mode = tmp & ~S_IFMT;
L
Linus Torvalds 已提交
3349
		bitmap[1] &= ~FATTR4_WORD1_MODE;
3350
		ret = NFS_ATTR_FATTR_MODE;
L
Linus Torvalds 已提交
3351
	}
3352
	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3353
	return ret;
B
Benny Halevy 已提交
3354 3355 3356
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3357 3358 3359 3360
}

static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
{
A
Al Viro 已提交
3361
	__be32 *p;
3362
	int ret = 0;
L
Linus Torvalds 已提交
3363 3364 3365 3366 3367

	*nlink = 1;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
B
Benny Halevy 已提交
3368 3369 3370
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3371
		*nlink = be32_to_cpup(p);
L
Linus Torvalds 已提交
3372
		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3373
		ret = NFS_ATTR_FATTR_NLINK;
L
Linus Torvalds 已提交
3374
	}
3375
	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3376
	return ret;
B
Benny Halevy 已提交
3377 3378 3379
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3380 3381
}

3382 3383
static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_client *clp, uint32_t *uid, int may_sleep)
L
Linus Torvalds 已提交
3384
{
A
Al Viro 已提交
3385 3386
	uint32_t len;
	__be32 *p;
3387
	int ret = 0;
L
Linus Torvalds 已提交
3388 3389 3390 3391 3392

	*uid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
B
Benny Halevy 已提交
3393 3394 3395
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3396
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3397 3398 3399
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3400 3401 3402
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3403 3404 3405
			if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
				ret = NFS_ATTR_FATTR_OWNER;
			else
L
Linus Torvalds 已提交
3406
				dprintk("%s: nfs_map_name_to_uid failed!\n",
3407
						__func__);
L
Linus Torvalds 已提交
3408
		} else
3409
			dprintk("%s: name too long (%u)!\n",
3410
					__func__, len);
L
Linus Torvalds 已提交
3411 3412
		bitmap[1] &= ~FATTR4_WORD1_OWNER;
	}
3413
	dprintk("%s: uid=%d\n", __func__, (int)*uid);
3414
	return ret;
B
Benny Halevy 已提交
3415 3416 3417
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3418 3419
}

3420 3421
static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_client *clp, uint32_t *gid, int may_sleep)
L
Linus Torvalds 已提交
3422
{
A
Al Viro 已提交
3423 3424
	uint32_t len;
	__be32 *p;
3425
	int ret = 0;
L
Linus Torvalds 已提交
3426 3427 3428 3429 3430

	*gid = -2;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
B
Benny Halevy 已提交
3431 3432 3433
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
3434
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
3435 3436 3437
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
3438 3439 3440
		if (!may_sleep) {
			/* do nothing */
		} else if (len < XDR_MAX_NETOBJ) {
3441 3442 3443
			if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
				ret = NFS_ATTR_FATTR_GROUP;
			else
L
Linus Torvalds 已提交
3444
				dprintk("%s: nfs_map_group_to_gid failed!\n",
3445
						__func__);
L
Linus Torvalds 已提交
3446
		} else
3447
			dprintk("%s: name too long (%u)!\n",
3448
					__func__, len);
L
Linus Torvalds 已提交
3449 3450
		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
	}
3451
	dprintk("%s: gid=%d\n", __func__, (int)*gid);
3452
	return ret;
B
Benny Halevy 已提交
3453 3454 3455
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3456 3457 3458 3459
}

static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
{
A
Al Viro 已提交
3460 3461
	uint32_t major = 0, minor = 0;
	__be32 *p;
3462
	int ret = 0;
L
Linus Torvalds 已提交
3463 3464 3465 3466 3467 3468 3469

	*rdev = MKDEV(0,0);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
		dev_t tmp;

B
Benny Halevy 已提交
3470 3471 3472
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
B
Benny Halevy 已提交
3473
		major = be32_to_cpup(p++);
3474
		minor = be32_to_cpup(p);
L
Linus Torvalds 已提交
3475 3476 3477 3478
		tmp = MKDEV(major, minor);
		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
			*rdev = tmp;
		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3479
		ret = NFS_ATTR_FATTR_RDEV;
L
Linus Torvalds 已提交
3480
	}
3481
	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3482
	return ret;
B
Benny Halevy 已提交
3483 3484 3485
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3486 3487 3488 3489
}

static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3490
	__be32 *p;
L
Linus Torvalds 已提交
3491 3492 3493 3494 3495 3496
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
B
Benny Halevy 已提交
3497 3498 3499
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3500
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3501 3502
		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
	}
3503
	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3504
	return status;
B
Benny Halevy 已提交
3505 3506 3507
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3508 3509 3510 3511
}

static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3512
	__be32 *p;
L
Linus Torvalds 已提交
3513 3514 3515 3516 3517 3518
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
B
Benny Halevy 已提交
3519 3520 3521
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3522
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3523 3524
		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
	}
3525
	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3526
	return status;
B
Benny Halevy 已提交
3527 3528 3529
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3530 3531 3532 3533
}

static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
{
A
Al Viro 已提交
3534
	__be32 *p;
L
Linus Torvalds 已提交
3535 3536 3537 3538 3539 3540
	int status = 0;

	*res = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
B
Benny Halevy 已提交
3541 3542 3543
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3544
		xdr_decode_hyper(p, res);
L
Linus Torvalds 已提交
3545 3546
		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
	}
3547
	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
L
Linus Torvalds 已提交
3548
	return status;
B
Benny Halevy 已提交
3549 3550 3551
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3552 3553 3554 3555
}

static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
{
A
Al Viro 已提交
3556
	__be32 *p;
3557
	int ret = 0;
L
Linus Torvalds 已提交
3558 3559 3560 3561 3562

	*used = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
B
Benny Halevy 已提交
3563 3564 3565
		p = xdr_inline_decode(xdr, 8);
		if (unlikely(!p))
			goto out_overflow;
3566
		xdr_decode_hyper(p, used);
L
Linus Torvalds 已提交
3567
		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3568
		ret = NFS_ATTR_FATTR_SPACE_USED;
L
Linus Torvalds 已提交
3569
	}
3570
	dprintk("%s: space used=%Lu\n", __func__,
L
Linus Torvalds 已提交
3571
			(unsigned long long)*used);
3572
	return ret;
B
Benny Halevy 已提交
3573 3574 3575
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3576 3577 3578 3579
}

static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
{
A
Al Viro 已提交
3580
	__be32 *p;
L
Linus Torvalds 已提交
3581 3582 3583
	uint64_t sec;
	uint32_t nsec;

B
Benny Halevy 已提交
3584 3585 3586
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3587
	p = xdr_decode_hyper(p, &sec);
3588
	nsec = be32_to_cpup(p);
L
Linus Torvalds 已提交
3589 3590 3591
	time->tv_sec = (time_t)sec;
	time->tv_nsec = (long)nsec;
	return 0;
B
Benny Halevy 已提交
3592 3593 3594
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606
}

static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
		status = decode_attr_time(xdr, time);
3607 3608
		if (status == 0)
			status = NFS_ATTR_FATTR_ATIME;
L
Linus Torvalds 已提交
3609 3610
		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
	}
3611
	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624
	return status;
}

static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
		status = decode_attr_time(xdr, time);
3625 3626
		if (status == 0)
			status = NFS_ATTR_FATTR_CTIME;
L
Linus Torvalds 已提交
3627 3628
		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
	}
3629
	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3630 3631 3632
	return status;
}

3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650
static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
				  struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
		status = decode_attr_time(xdr, time);
		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
	}
	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
		(long)time->tv_nsec);
	return status;
}

L
Linus Torvalds 已提交
3651 3652 3653 3654 3655 3656 3657 3658 3659 3660
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
	int status = 0;

	time->tv_sec = 0;
	time->tv_nsec = 0;
	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
		return -EIO;
	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
		status = decode_attr_time(xdr, time);
3661 3662
		if (status == 0)
			status = NFS_ATTR_FATTR_MTIME;
L
Linus Torvalds 已提交
3663 3664
		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
	}
3665
	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
L
Linus Torvalds 已提交
3666 3667 3668
	return status;
}

A
Al Viro 已提交
3669
static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
L
Linus Torvalds 已提交
3670 3671 3672 3673 3674
{
	unsigned int attrwords = XDR_QUADLEN(attrlen);
	unsigned int nwords = xdr->p - savep;

	if (unlikely(attrwords != nwords)) {
3675 3676
		dprintk("%s: server returned incorrect attribute length: "
			"%u %c %u\n",
3677
				__func__,
L
Linus Torvalds 已提交
3678 3679 3680 3681 3682 3683 3684 3685 3686 3687
				attrwords << 2,
				(attrwords < nwords) ? '<' : '>',
				nwords << 2);
		return -EIO;
	}
	return 0;
}

static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3688
	__be32 *p;
L
Linus Torvalds 已提交
3689

B
Benny Halevy 已提交
3690 3691 3692
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3693
	cinfo->atomic = be32_to_cpup(p++);
B
Benny Halevy 已提交
3694
	p = xdr_decode_hyper(p, &cinfo->before);
3695
	xdr_decode_hyper(p, &cinfo->after);
L
Linus Torvalds 已提交
3696
	return 0;
B
Benny Halevy 已提交
3697 3698 3699
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3700 3701 3702 3703
}

static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
{
A
Al Viro 已提交
3704
	__be32 *p;
L
Linus Torvalds 已提交
3705 3706 3707 3708 3709 3710
	uint32_t supp, acc;
	int status;

	status = decode_op_hdr(xdr, OP_ACCESS);
	if (status)
		return status;
B
Benny Halevy 已提交
3711 3712 3713
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
3714
	supp = be32_to_cpup(p++);
3715
	acc = be32_to_cpup(p);
L
Linus Torvalds 已提交
3716 3717 3718
	access->supported = supp;
	access->access = acc;
	return 0;
B
Benny Halevy 已提交
3719 3720 3721
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3722 3723
}

3724
static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
L
Linus Torvalds 已提交
3725
{
A
Al Viro 已提交
3726
	__be32 *p;
3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743

	p = xdr_inline_decode(xdr, len);
	if (likely(p)) {
		memcpy(buf, p, len);
		return 0;
	}
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
{
	return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
}

static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
{
L
Linus Torvalds 已提交
3744 3745 3746
	int status;

	status = decode_op_hdr(xdr, OP_CLOSE);
3747 3748
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
3749 3750 3751
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
3752 3753
}

3754 3755 3756
static int decode_verifier(struct xdr_stream *xdr, void *verifier)
{
	return decode_opaque_fixed(xdr, verifier, 8);
L
Linus Torvalds 已提交
3757 3758 3759 3760 3761 3762 3763
}

static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_COMMIT);
3764 3765 3766
	if (!status)
		status = decode_verifier(xdr, res->verf->verifier);
	return status;
L
Linus Torvalds 已提交
3767 3768 3769 3770
}

static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
A
Al Viro 已提交
3771
	__be32 *p;
L
Linus Torvalds 已提交
3772 3773 3774 3775 3776 3777 3778 3779
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_CREATE);
	if (status)
		return status;
	if ((status = decode_change_info(xdr, cinfo)))
		return status;
B
Benny Halevy 已提交
3780 3781 3782
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
3783
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
3784 3785 3786 3787 3788 3789
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
3790 3791 3792 3793
}

static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
{
A
Al Viro 已提交
3794
	__be32 *savep;
3795
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;
	if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
		goto xdr_error;
	if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
		goto xdr_error;
	if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
		goto xdr_error;
	if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
		goto xdr_error;
	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3814
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3815 3816
	return status;
}
3817

L
Linus Torvalds 已提交
3818 3819
static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
{
A
Al Viro 已提交
3820
	__be32 *savep;
3821
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3822
	int status;
3823

L
Linus Torvalds 已提交
3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
		goto xdr_error;
	if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3846
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3847 3848 3849 3850 3851
	return status;
}

static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
{
A
Al Viro 已提交
3852
	__be32 *savep;
3853
	uint32_t attrlen, bitmap[2] = {0};
L
Linus Torvalds 已提交
3854
	int status;
3855

L
Linus Torvalds 已提交
3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
		goto xdr_error;

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
3870
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
3871 3872 3873
	return status;
}

3874 3875
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
		struct nfs_fattr *fattr, struct nfs_fh *fh,
3876
		const struct nfs_server *server, int may_sleep)
L
Linus Torvalds 已提交
3877
{
3878 3879
	int status;
	umode_t fmode = 0;
3880
	uint64_t fileid;
3881
	uint32_t type;
L
Linus Torvalds 已提交
3882

3883 3884
	status = decode_attr_type(xdr, bitmap, &type);
	if (status < 0)
L
Linus Torvalds 已提交
3885
		goto xdr_error;
3886 3887 3888 3889 3890
	fattr->mode = 0;
	if (status != 0) {
		fattr->mode |= nfs_type2fmt[type];
		fattr->valid |= status;
	}
L
Linus Torvalds 已提交
3891

3892 3893
	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
	if (status < 0)
L
Linus Torvalds 已提交
3894
		goto xdr_error;
3895
	fattr->valid |= status;
3896 3897 3898

	status = decode_attr_size(xdr, bitmap, &fattr->size);
	if (status < 0)
L
Linus Torvalds 已提交
3899
		goto xdr_error;
3900
	fattr->valid |= status;
3901 3902 3903

	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
	if (status < 0)
L
Linus Torvalds 已提交
3904
		goto xdr_error;
3905
	fattr->valid |= status;
3906

3907 3908 3909 3910 3911 3912 3913 3914
	status = decode_attr_error(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

	status = decode_attr_filehandle(xdr, bitmap, fh);
	if (status < 0)
		goto xdr_error;

3915 3916
	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
	if (status < 0)
L
Linus Torvalds 已提交
3917
		goto xdr_error;
3918
	fattr->valid |= status;
3919 3920

	status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3921
						struct nfs4_fs_locations,
3922 3923
						fattr));
	if (status < 0)
3924
		goto xdr_error;
3925
	fattr->valid |= status;
3926 3927 3928

	status = decode_attr_mode(xdr, bitmap, &fmode);
	if (status < 0)
L
Linus Torvalds 已提交
3929
		goto xdr_error;
3930 3931 3932 3933
	if (status != 0) {
		fattr->mode |= fmode;
		fattr->valid |= status;
	}
3934 3935 3936

	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
	if (status < 0)
L
Linus Torvalds 已提交
3937
		goto xdr_error;
3938
	fattr->valid |= status;
3939

3940 3941
	status = decode_attr_owner(xdr, bitmap, server->nfs_client,
			&fattr->uid, may_sleep);
3942
	if (status < 0)
L
Linus Torvalds 已提交
3943
		goto xdr_error;
3944
	fattr->valid |= status;
3945

3946 3947
	status = decode_attr_group(xdr, bitmap, server->nfs_client,
			&fattr->gid, may_sleep);
3948
	if (status < 0)
L
Linus Torvalds 已提交
3949
		goto xdr_error;
3950
	fattr->valid |= status;
3951 3952 3953

	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
	if (status < 0)
L
Linus Torvalds 已提交
3954
		goto xdr_error;
3955
	fattr->valid |= status;
3956 3957 3958

	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
	if (status < 0)
L
Linus Torvalds 已提交
3959
		goto xdr_error;
3960
	fattr->valid |= status;
3961 3962 3963

	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
	if (status < 0)
L
Linus Torvalds 已提交
3964
		goto xdr_error;
3965
	fattr->valid |= status;
3966 3967 3968

	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
	if (status < 0)
L
Linus Torvalds 已提交
3969
		goto xdr_error;
3970
	fattr->valid |= status;
3971 3972 3973

	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
	if (status < 0)
L
Linus Torvalds 已提交
3974
		goto xdr_error;
3975
	fattr->valid |= status;
3976 3977 3978

	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
	if (status < 0)
3979
		goto xdr_error;
3980
	if (status != 0 && !(fattr->valid & status)) {
3981
		fattr->fileid = fileid;
3982 3983
		fattr->valid |= status;
	}
3984

3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013
xdr_error:
	dprintk("%s: xdr returned %d\n", __func__, -status);
	return status;
}

static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
{
	__be32 *savep;
	uint32_t attrlen,
		 bitmap[2] = {0};
	int status;

	status = decode_op_hdr(xdr, OP_GETATTR);
	if (status < 0)
		goto xdr_error;

	status = decode_attr_bitmap(xdr, bitmap);
	if (status < 0)
		goto xdr_error;

	status = decode_attr_length(xdr, &attrlen, &savep);
	if (status < 0)
		goto xdr_error;

	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
	if (status < 0)
		goto xdr_error;

4014
	status = verify_attr_len(xdr, savep, attrlen);
L
Linus Torvalds 已提交
4015
xdr_error:
4016
	dprintk("%s: xdr returned %d\n", __func__, -status);
L
Linus Torvalds 已提交
4017 4018 4019
	return status;
}

4020 4021 4022 4023 4024
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
		const struct nfs_server *server, int may_sleep)
{
	return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
}
L
Linus Torvalds 已提交
4025

4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080
/*
 * Decode potentially multiple layout types. Currently we only support
 * one layout driver per file system.
 */
static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
					 uint32_t *layouttype)
{
	uint32_t *p;
	int num;

	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	num = be32_to_cpup(p);

	/* pNFS is not supported by the underlying file system */
	if (num == 0) {
		*layouttype = 0;
		return 0;
	}
	if (num > 1)
		printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
			"per filesystem not supported\n", __func__);

	/* Decode and set first layout type, move xdr->p past unused types */
	p = xdr_inline_decode(xdr, num * 4);
	if (unlikely(!p))
		goto out_overflow;
	*layouttype = be32_to_cpup(p);
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

/*
 * The type of file system exported.
 * Note we must ensure that layouttype is set in any non-error case.
 */
static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
				uint32_t *layouttype)
{
	int status = 0;

	dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
	if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
		return -EIO;
	if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
		status = decode_first_pnfs_layout_type(xdr, layouttype);
		bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
	} else
		*layouttype = 0;
	return status;
}

L
Linus Torvalds 已提交
4081 4082
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
A
Al Viro 已提交
4083
	__be32 *savep;
L
Linus Torvalds 已提交
4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105
	uint32_t attrlen, bitmap[2];
	int status;

	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto xdr_error;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto xdr_error;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto xdr_error;

	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */

	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
		goto xdr_error;
	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
		goto xdr_error;
	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
		goto xdr_error;
	fsinfo->wtpref = fsinfo->wtmax;
4106
	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4107 4108 4109
	if (status != 0)
		goto xdr_error;
	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4110 4111
	if (status != 0)
		goto xdr_error;
L
Linus Torvalds 已提交
4112 4113 4114

	status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
4115
	dprintk("%s: xdr returned %d!\n", __func__, -status);
L
Linus Torvalds 已提交
4116 4117 4118 4119 4120
	return status;
}

static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
{
A
Al Viro 已提交
4121
	__be32 *p;
L
Linus Torvalds 已提交
4122 4123 4124
	uint32_t len;
	int status;

4125 4126 4127
	/* Zero handle first to allow comparisons */
	memset(fh, 0, sizeof(*fh));

L
Linus Torvalds 已提交
4128 4129 4130 4131
	status = decode_op_hdr(xdr, OP_GETFH);
	if (status)
		return status;

B
Benny Halevy 已提交
4132 4133 4134
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4135
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4136 4137 4138
	if (len > NFS4_FHSIZE)
		return -EIO;
	fh->size = len;
B
Benny Halevy 已提交
4139 4140 4141
	p = xdr_inline_decode(xdr, len);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4142
	memcpy(fh->data, p, len);
L
Linus Torvalds 已提交
4143
	return 0;
B
Benny Halevy 已提交
4144 4145 4146
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4147 4148 4149 4150 4151
}

static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;
4152

L
Linus Torvalds 已提交
4153 4154 4155 4156 4157 4158 4159 4160 4161
	status = decode_op_hdr(xdr, OP_LINK);
	if (status)
		return status;
	return decode_change_info(xdr, cinfo);
}

/*
 * We create the owner, so we know a proper owner.id length is 4.
 */
T
Trond Myklebust 已提交
4162
static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
L
Linus Torvalds 已提交
4163
{
T
Trond Myklebust 已提交
4164
	uint64_t offset, length, clientid;
A
Al Viro 已提交
4165
	__be32 *p;
T
Trond Myklebust 已提交
4166
	uint32_t namelen, type;
L
Linus Torvalds 已提交
4167

4168
	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
B
Benny Halevy 已提交
4169 4170
	if (unlikely(!p))
		goto out_overflow;
4171
	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
B
Benny Halevy 已提交
4172
	p = xdr_decode_hyper(p, &length);
4173 4174
	type = be32_to_cpup(p++); /* 4 byte read */
	if (fl != NULL) { /* manipulate file lock */
T
Trond Myklebust 已提交
4175 4176 4177 4178 4179 4180 4181 4182 4183
		fl->fl_start = (loff_t)offset;
		fl->fl_end = fl->fl_start + (loff_t)length - 1;
		if (length == ~(uint64_t)0)
			fl->fl_end = OFFSET_MAX;
		fl->fl_type = F_WRLCK;
		if (type & 1)
			fl->fl_type = F_RDLCK;
		fl->fl_pid = 0;
	}
4184 4185 4186
	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
	p = xdr_inline_decode(xdr, namelen); /* variable size field */
B
Benny Halevy 已提交
4187 4188 4189 4190 4191
	if (likely(p))
		return -NFS4ERR_DENIED;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4192 4193
}

T
Trond Myklebust 已提交
4194
static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
L
Linus Torvalds 已提交
4195 4196 4197 4198
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCK);
4199 4200
	if (status == -EIO)
		goto out;
L
Linus Torvalds 已提交
4201
	if (status == 0) {
4202 4203 4204
		status = decode_stateid(xdr, &res->stateid);
		if (unlikely(status))
			goto out;
L
Linus Torvalds 已提交
4205
	} else if (status == -NFS4ERR_DENIED)
4206 4207 4208 4209 4210
		status = decode_lock_denied(xdr, NULL);
	if (res->open_seqid != NULL)
		nfs_increment_open_seqid(status, res->open_seqid);
	nfs_increment_lock_seqid(status, res->lock_seqid);
out:
L
Linus Torvalds 已提交
4211 4212 4213
	return status;
}

T
Trond Myklebust 已提交
4214
static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
4215 4216 4217 4218
{
	int status;
	status = decode_op_hdr(xdr, OP_LOCKT);
	if (status == -NFS4ERR_DENIED)
T
Trond Myklebust 已提交
4219
		return decode_lock_denied(xdr, res->denied);
L
Linus Torvalds 已提交
4220 4221 4222
	return status;
}

T
Trond Myklebust 已提交
4223
static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
L
Linus Torvalds 已提交
4224 4225 4226 4227
{
	int status;

	status = decode_op_hdr(xdr, OP_LOCKU);
4228 4229
	if (status != -EIO)
		nfs_increment_lock_seqid(status, res->seqid);
4230 4231
	if (status == 0)
		status = decode_stateid(xdr, &res->stateid);
L
Linus Torvalds 已提交
4232 4233 4234
	return status;
}

4235 4236 4237 4238 4239
static int decode_release_lockowner(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}

L
Linus Torvalds 已提交
4240 4241 4242 4243 4244 4245 4246 4247
static int decode_lookup(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_LOOKUP);
}

/* This is too sick! */
static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
{
A
Andy Adamson 已提交
4248
	__be32 *p;
L
Linus Torvalds 已提交
4249 4250
	uint32_t limit_type, nblocks, blocksize;

B
Benny Halevy 已提交
4251 4252 4253
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4254
	limit_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4255
	switch (limit_type) {
A
Andy Adamson 已提交
4256
	case 1:
4257
		xdr_decode_hyper(p, maxsize);
A
Andy Adamson 已提交
4258 4259
		break;
	case 2:
B
Benny Halevy 已提交
4260
		nblocks = be32_to_cpup(p++);
4261
		blocksize = be32_to_cpup(p);
A
Andy Adamson 已提交
4262
		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
L
Linus Torvalds 已提交
4263 4264
	}
	return 0;
B
Benny Halevy 已提交
4265 4266 4267
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4268 4269 4270 4271
}

static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4272 4273
	__be32 *p;
	uint32_t delegation_type;
4274
	int status;
L
Linus Torvalds 已提交
4275

B
Benny Halevy 已提交
4276 4277 4278
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4279
	delegation_type = be32_to_cpup(p);
L
Linus Torvalds 已提交
4280 4281 4282 4283
	if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
		res->delegation_type = 0;
		return 0;
	}
4284 4285 4286
	status = decode_stateid(xdr, &res->delegation);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4287 4288 4289
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4290
	res->do_recall = be32_to_cpup(p);
A
Andy Adamson 已提交
4291

L
Linus Torvalds 已提交
4292
	switch (delegation_type) {
A
Andy Adamson 已提交
4293 4294 4295 4296 4297 4298
	case NFS4_OPEN_DELEGATE_READ:
		res->delegation_type = FMODE_READ;
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
		res->delegation_type = FMODE_WRITE|FMODE_READ;
		if (decode_space_limit(xdr, &res->maxsize) < 0)
L
Linus Torvalds 已提交
4299 4300
				return -EIO;
	}
4301
	return decode_ace(xdr, NULL, res->server->nfs_client);
B
Benny Halevy 已提交
4302 4303 4304
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4305 4306 4307 4308
}

static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
{
A
Andy Adamson 已提交
4309
	__be32 *p;
4310
	uint32_t savewords, bmlen, i;
A
Andy Adamson 已提交
4311
	int status;
L
Linus Torvalds 已提交
4312

A
Andy Adamson 已提交
4313
	status = decode_op_hdr(xdr, OP_OPEN);
4314 4315
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4316 4317 4318
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	if (unlikely(status))
A
Andy Adamson 已提交
4319
		return status;
L
Linus Torvalds 已提交
4320

A
Andy Adamson 已提交
4321
	decode_change_info(xdr, &res->cinfo);
L
Linus Torvalds 已提交
4322

B
Benny Halevy 已提交
4323 4324 4325
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4326
	res->rflags = be32_to_cpup(p++);
4327
	bmlen = be32_to_cpup(p);
A
Andy Adamson 已提交
4328 4329
	if (bmlen > 10)
		goto xdr_error;
L
Linus Torvalds 已提交
4330

B
Benny Halevy 已提交
4331 4332 4333
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (unlikely(!p))
		goto out_overflow;
4334 4335
	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
	for (i = 0; i < savewords; ++i)
B
Benny Halevy 已提交
4336
		res->attrset[i] = be32_to_cpup(p++);
4337 4338 4339
	for (; i < NFS4_BITMAP_SIZE; i++)
		res->attrset[i] = 0;

L
Linus Torvalds 已提交
4340 4341
	return decode_delegation(xdr, res);
xdr_error:
4342
	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
L
Linus Torvalds 已提交
4343
	return -EIO;
B
Benny Halevy 已提交
4344 4345 4346
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4347 4348 4349 4350 4351 4352
}

static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
{
	int status;

A
Andy Adamson 已提交
4353
	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4354 4355
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4356 4357 4358
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4359 4360 4361 4362 4363 4364 4365
}

static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
{
	int status;

	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4366 4367
	if (status != -EIO)
		nfs_increment_open_seqid(status, res->seqid);
4368 4369 4370
	if (!status)
		status = decode_stateid(xdr, &res->stateid);
	return status;
L
Linus Torvalds 已提交
4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385
}

static int decode_putfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTFH);
}

static int decode_putrootfh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_PUTROOTFH);
}

static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
{
	struct kvec *iov = req->rq_rcv_buf.head;
A
Al Viro 已提交
4386
	__be32 *p;
L
Linus Torvalds 已提交
4387 4388 4389 4390 4391 4392
	uint32_t count, eof, recvd, hdrlen;
	int status;

	status = decode_op_hdr(xdr, OP_READ);
	if (status)
		return status;
B
Benny Halevy 已提交
4393 4394 4395
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4396
	eof = be32_to_cpup(p++);
4397
	count = be32_to_cpup(p);
4398
	hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
L
Linus Torvalds 已提交
4399 4400
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (count > recvd) {
4401
		dprintk("NFS: server cheating in read reply: "
L
Linus Torvalds 已提交
4402 4403 4404 4405 4406 4407 4408 4409
				"count %u > recvd %u\n", count, recvd);
		count = recvd;
		eof = 0;
	}
	xdr_read_pages(xdr, count);
	res->eof = eof;
	res->count = count;
	return 0;
B
Benny Halevy 已提交
4410 4411 4412
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4413 4414 4415 4416 4417 4418
}

static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
	struct xdr_buf	*rcvbuf = &req->rq_rcv_buf;
	struct kvec	*iov = rcvbuf->head;
4419 4420 4421
	size_t		hdrlen;
	u32		recvd, pglen = rcvbuf->page_len;
	int		status;
L
Linus Torvalds 已提交
4422 4423

	status = decode_op_hdr(xdr, OP_READDIR);
4424 4425 4426
	if (!status)
		status = decode_verifier(xdr, readdir->verifier.data);
	if (unlikely(status))
L
Linus Torvalds 已提交
4427
		return status;
4428 4429
	dprintk("%s: verifier = %08x:%08x\n",
			__func__,
4430 4431 4432
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1]);

L
Linus Torvalds 已提交
4433

4434
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
L
Linus Torvalds 已提交
4435 4436 4437 4438 4439
	recvd = rcvbuf->len - hdrlen;
	if (pglen > recvd)
		pglen = recvd;
	xdr_read_pages(xdr, pglen);

4440

4441
	return pglen;
L
Linus Torvalds 已提交
4442 4443 4444 4445 4446 4447
}

static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
{
	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
	struct kvec *iov = rcvbuf->head;
4448 4449
	size_t hdrlen;
	u32 len, recvd;
A
Al Viro 已提交
4450
	__be32 *p;
L
Linus Torvalds 已提交
4451 4452 4453 4454 4455 4456 4457
	int status;

	status = decode_op_hdr(xdr, OP_READLINK);
	if (status)
		return status;

	/* Convert length of symlink */
B
Benny Halevy 已提交
4458 4459 4460
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4461
	len = be32_to_cpup(p);
L
Linus Torvalds 已提交
4462
	if (len >= rcvbuf->page_len || len <= 0) {
4463
		dprintk("nfs: server returned giant symlink!\n");
L
Linus Torvalds 已提交
4464 4465 4466 4467 4468
		return -ENAMETOOLONG;
	}
	hdrlen = (char *) xdr->p - (char *) iov->iov_base;
	recvd = req->rq_rcv_buf.len - hdrlen;
	if (recvd < len) {
4469
		dprintk("NFS: server cheating in readlink reply: "
L
Linus Torvalds 已提交
4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480
				"count %u > recvd %u\n", len, recvd);
		return -EIO;
	}
	xdr_read_pages(xdr, len);
	/*
	 * The XDR encode routine has set things up so that
	 * the link text will be copied directly into the
	 * buffer.  We just have to do overflow-checking,
	 * and and null-terminate the text (the VFS expects
	 * null-termination).
	 */
4481
	xdr_terminate_string(rcvbuf, len);
L
Linus Torvalds 已提交
4482
	return 0;
B
Benny Halevy 已提交
4483 4484 4485
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519
}

static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_REMOVE);
	if (status)
		goto out;
	status = decode_change_info(xdr, cinfo);
out:
	return status;
}

static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
	      struct nfs4_change_info *new_cinfo)
{
	int status;

	status = decode_op_hdr(xdr, OP_RENAME);
	if (status)
		goto out;
	if ((status = decode_change_info(xdr, old_cinfo)))
		goto out;
	status = decode_change_info(xdr, new_cinfo);
out:
	return status;
}

static int decode_renew(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RENEW);
}

4520 4521 4522 4523 4524 4525
static int
decode_restorefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_RESTOREFH);
}

4526 4527 4528
static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
		size_t *acl_len)
{
A
Al Viro 已提交
4529
	__be32 *savep;
4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545
	uint32_t attrlen,
		 bitmap[2] = {0};
	struct kvec *iov = req->rq_rcv_buf.head;
	int status;

	*acl_len = 0;
	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
		goto out;
	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
		goto out;
	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
		goto out;

	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
		return -EIO;
	if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4546 4547
		size_t hdrlen;
		u32 recvd;
4548 4549 4550 4551 4552 4553

		/* We ignore &savep and don't do consistency checks on
		 * the attr length.  Let userspace figure it out.... */
		hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
		recvd = req->rq_rcv_buf.len - hdrlen;
		if (attrlen > recvd) {
4554
			dprintk("NFS: server cheating in getattr"
4555 4556 4557 4558
					" acl reply: attrlen %u > recvd %u\n",
					attrlen, recvd);
			return -EINVAL;
		}
4559
		xdr_read_pages(xdr, attrlen);
4560
		*acl_len = attrlen;
J
J. Bruce Fields 已提交
4561 4562
	} else
		status = -EOPNOTSUPP;
4563 4564 4565 4566 4567

out:
	return status;
}

L
Linus Torvalds 已提交
4568 4569 4570 4571 4572 4573
static int
decode_savefh(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SAVEFH);
}

4574
static int decode_setattr(struct xdr_stream *xdr)
L
Linus Torvalds 已提交
4575
{
A
Al Viro 已提交
4576
	__be32 *p;
L
Linus Torvalds 已提交
4577 4578 4579 4580 4581 4582
	uint32_t bmlen;
	int status;

	status = decode_op_hdr(xdr, OP_SETATTR);
	if (status)
		return status;
B
Benny Halevy 已提交
4583 4584 4585
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
4586
	bmlen = be32_to_cpup(p);
B
Benny Halevy 已提交
4587 4588 4589 4590 4591 4592
	p = xdr_inline_decode(xdr, bmlen << 2);
	if (likely(p))
		return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4593 4594
}

4595
static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
4596
{
A
Al Viro 已提交
4597
	__be32 *p;
L
Linus Torvalds 已提交
4598 4599 4600
	uint32_t opnum;
	int32_t nfserr;

B
Benny Halevy 已提交
4601 4602 4603
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4604
	opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
4605
	if (opnum != OP_SETCLIENTID) {
4606
		dprintk("nfs: decode_setclientid: Server returned operation"
4607
			" %d\n", opnum);
L
Linus Torvalds 已提交
4608 4609
		return -EIO;
	}
4610
	nfserr = be32_to_cpup(p);
L
Linus Torvalds 已提交
4611
	if (nfserr == NFS_OK) {
B
Benny Halevy 已提交
4612 4613 4614
		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (unlikely(!p))
			goto out_overflow;
4615 4616
		p = xdr_decode_hyper(p, &res->clientid);
		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
4617 4618 4619 4620
	} else if (nfserr == NFSERR_CLID_INUSE) {
		uint32_t len;

		/* skip netid string */
B
Benny Halevy 已提交
4621 4622 4623
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4624
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4625 4626 4627
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4628 4629

		/* skip uaddr string */
B
Benny Halevy 已提交
4630 4631 4632
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
4633
		len = be32_to_cpup(p);
B
Benny Halevy 已提交
4634 4635 4636
		p = xdr_inline_decode(xdr, len);
		if (unlikely(!p))
			goto out_overflow;
L
Linus Torvalds 已提交
4637 4638
		return -NFSERR_CLID_INUSE;
	} else
4639
		return nfs4_stat_to_errno(nfserr);
L
Linus Torvalds 已提交
4640 4641

	return 0;
B
Benny Halevy 已提交
4642 4643 4644
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4645 4646 4647 4648 4649 4650 4651 4652 4653
}

static int decode_setclientid_confirm(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
}

static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
{
A
Al Viro 已提交
4654
	__be32 *p;
L
Linus Torvalds 已提交
4655 4656 4657 4658 4659 4660
	int status;

	status = decode_op_hdr(xdr, OP_WRITE);
	if (status)
		return status;

B
Benny Halevy 已提交
4661 4662 4663
	p = xdr_inline_decode(xdr, 16);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4664 4665
	res->count = be32_to_cpup(p++);
	res->verf->committed = be32_to_cpup(p++);
B
Benny Halevy 已提交
4666
	memcpy(res->verf->verifier, p, 8);
L
Linus Torvalds 已提交
4667
	return 0;
B
Benny Halevy 已提交
4668 4669 4670
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
L
Linus Torvalds 已提交
4671 4672 4673 4674 4675 4676 4677
}

static int decode_delegreturn(struct xdr_stream *xdr)
{
	return decode_op_hdr(xdr, OP_DELEGRETURN);
}

B
Benny Halevy 已提交
4678 4679 4680 4681 4682 4683
#if defined(CONFIG_NFS_V4_1)
static int decode_exchange_id(struct xdr_stream *xdr,
			      struct nfs41_exchange_id_res *res)
{
	__be32 *p;
	uint32_t dummy;
4684
	char *dummy_str;
B
Benny Halevy 已提交
4685 4686 4687 4688 4689 4690 4691
	int status;
	struct nfs_client *clp = res->client;

	status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
	if (status)
		return status;

B
Benny Halevy 已提交
4692 4693 4694
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
4695
	xdr_decode_hyper(p, &clp->cl_ex_clid);
B
Benny Halevy 已提交
4696 4697 4698
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4699 4700
	clp->cl_seqid = be32_to_cpup(p++);
	clp->cl_exchange_flags = be32_to_cpup(p++);
B
Benny Halevy 已提交
4701 4702

	/* We ask for SP4_NONE */
4703
	dummy = be32_to_cpup(p);
B
Benny Halevy 已提交
4704 4705 4706 4707
	if (dummy != SP4_NONE)
		return -EIO;

	/* Throw away minor_id */
B
Benny Halevy 已提交
4708 4709 4710
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4711 4712

	/* Throw away Major id */
4713 4714 4715
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4716 4717

	/* Throw away server_scope */
4718 4719 4720
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4721 4722

	/* Throw away Implementation id array */
4723 4724 4725
	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
	if (unlikely(status))
		return status;
B
Benny Halevy 已提交
4726 4727

	return 0;
B
Benny Halevy 已提交
4728 4729 4730
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
B
Benny Halevy 已提交
4731
}
A
Andy Adamson 已提交
4732 4733 4734 4735 4736 4737 4738

static int decode_chan_attrs(struct xdr_stream *xdr,
			     struct nfs4_channel_attrs *attrs)
{
	__be32 *p;
	u32 nr_attrs;

B
Benny Halevy 已提交
4739 4740 4741
	p = xdr_inline_decode(xdr, 28);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4742 4743 4744 4745 4746 4747
	attrs->headerpadsz = be32_to_cpup(p++);
	attrs->max_rqst_sz = be32_to_cpup(p++);
	attrs->max_resp_sz = be32_to_cpup(p++);
	attrs->max_resp_sz_cached = be32_to_cpup(p++);
	attrs->max_ops = be32_to_cpup(p++);
	attrs->max_reqs = be32_to_cpup(p++);
4748
	nr_attrs = be32_to_cpup(p);
A
Andy Adamson 已提交
4749 4750 4751 4752 4753
	if (unlikely(nr_attrs > 1)) {
		printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
			__func__, nr_attrs);
		return -EINVAL;
	}
B
Benny Halevy 已提交
4754 4755 4756 4757 4758
	if (nr_attrs == 1) {
		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
		if (unlikely(!p))
			goto out_overflow;
	}
A
Andy Adamson 已提交
4759
	return 0;
B
Benny Halevy 已提交
4760 4761 4762
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4763 4764
}

4765 4766 4767
static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
{
	return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
A
Andy Adamson 已提交
4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778
}

static int decode_create_session(struct xdr_stream *xdr,
				 struct nfs41_create_session_res *res)
{
	__be32 *p;
	int status;
	struct nfs_client *clp = res->client;
	struct nfs4_session *session = clp->cl_session;

	status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4779 4780 4781
	if (!status)
		status = decode_sessionid(xdr, &session->sess_id);
	if (unlikely(status))
A
Andy Adamson 已提交
4782 4783 4784
		return status;

	/* seqid, flags */
B
Benny Halevy 已提交
4785 4786 4787
	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
B
Benny Halevy 已提交
4788
	clp->cl_seqid = be32_to_cpup(p++);
4789
	session->flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4790 4791 4792 4793 4794 4795

	/* Channel attributes */
	status = decode_chan_attrs(xdr, &session->fc_attrs);
	if (!status)
		status = decode_chan_attrs(xdr, &session->bc_attrs);
	return status;
B
Benny Halevy 已提交
4796 4797 4798
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
A
Andy Adamson 已提交
4799
}
A
Andy Adamson 已提交
4800 4801 4802 4803 4804

static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
4805 4806 4807 4808 4809

static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
{
	return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
}
B
Benny Halevy 已提交
4810 4811
#endif /* CONFIG_NFS_V4_1 */

4812 4813 4814 4815 4816
static int decode_sequence(struct xdr_stream *xdr,
			   struct nfs4_sequence_res *res,
			   struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
A
Andy Adamson 已提交
4817 4818 4819 4820 4821
	struct nfs4_sessionid id;
	u32 dummy;
	int status;
	__be32 *p;

4822 4823 4824
	if (!res->sr_session)
		return 0;

A
Andy Adamson 已提交
4825
	status = decode_op_hdr(xdr, OP_SEQUENCE);
4826 4827 4828
	if (!status)
		status = decode_sessionid(xdr, &id);
	if (unlikely(status))
A
Andy Adamson 已提交
4829
		goto out_err;
4830

A
Andy Adamson 已提交
4831 4832 4833 4834
	/*
	 * If the server returns different values for sessionID, slotID or
	 * sequence number, the server is looney tunes.
	 */
4835
	status = -EREMOTEIO;
A
Andy Adamson 已提交
4836 4837 4838 4839 4840 4841

	if (memcmp(id.data, res->sr_session->sess_id.data,
		   NFS4_MAX_SESSIONID_LEN)) {
		dprintk("%s Invalid session id\n", __func__);
		goto out_err;
	}
4842

B
Benny Halevy 已提交
4843 4844 4845
	p = xdr_inline_decode(xdr, 20);
	if (unlikely(!p))
		goto out_overflow;
4846

A
Andy Adamson 已提交
4847
	/* seqid */
B
Benny Halevy 已提交
4848
	dummy = be32_to_cpup(p++);
4849
	if (dummy != res->sr_slot->seq_nr) {
A
Andy Adamson 已提交
4850 4851 4852 4853
		dprintk("%s Invalid sequence number\n", __func__);
		goto out_err;
	}
	/* slot id */
B
Benny Halevy 已提交
4854
	dummy = be32_to_cpup(p++);
4855
	if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
A
Andy Adamson 已提交
4856 4857 4858 4859
		dprintk("%s Invalid slot id\n", __func__);
		goto out_err;
	}
	/* highest slot id - currently not processed */
B
Benny Halevy 已提交
4860
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
4861
	/* target highest slot id - currently not processed */
B
Benny Halevy 已提交
4862
	dummy = be32_to_cpup(p++);
4863 4864
	/* result flags */
	res->sr_status_flags = be32_to_cpup(p);
A
Andy Adamson 已提交
4865 4866 4867 4868
	status = 0;
out_err:
	res->sr_status = status;
	return status;
B
Benny Halevy 已提交
4869 4870 4871 4872
out_overflow:
	print_overflow_msg(__func__, xdr);
	status = -EIO;
	goto out_err;
A
Andy Adamson 已提交
4873
#else  /* CONFIG_NFS_V4_1 */
4874
	return 0;
A
Andy Adamson 已提交
4875
#endif /* CONFIG_NFS_V4_1 */
4876 4877
}

4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922
#if defined(CONFIG_NFS_V4_1)

static int decode_getdeviceinfo(struct xdr_stream *xdr,
				struct pnfs_device *pdev)
{
	__be32 *p;
	uint32_t len, type;
	int status;

	status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
	if (status) {
		if (status == -ETOOSMALL) {
			p = xdr_inline_decode(xdr, 4);
			if (unlikely(!p))
				goto out_overflow;
			pdev->mincount = be32_to_cpup(p);
			dprintk("%s: Min count too small. mincnt = %u\n",
				__func__, pdev->mincount);
		}
		return status;
	}

	p = xdr_inline_decode(xdr, 8);
	if (unlikely(!p))
		goto out_overflow;
	type = be32_to_cpup(p++);
	if (type != pdev->layout_type) {
		dprintk("%s: layout mismatch req: %u pdev: %u\n",
			__func__, pdev->layout_type, type);
		return -EINVAL;
	}
	/*
	 * Get the length of the opaque device_addr4. xdr_read_pages places
	 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
	 * and places the remaining xdr data in xdr_buf->tail
	 */
	pdev->mincount = be32_to_cpup(p);
	xdr_read_pages(xdr, pdev->mincount); /* include space for the length */

	/* Parse notification bitmap, verifying that it is zero. */
	p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	len = be32_to_cpup(p);
	if (len) {
4923
		uint32_t i;
4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005

		p = xdr_inline_decode(xdr, 4 * len);
		if (unlikely(!p))
			goto out_overflow;
		for (i = 0; i < len; i++, p++) {
			if (be32_to_cpup(p)) {
				dprintk("%s: notifications not supported\n",
					__func__);
				return -EIO;
			}
		}
	}
	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}

static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
			    struct nfs4_layoutget_res *res)
{
	__be32 *p;
	int status;
	u32 layout_count;

	status = decode_op_hdr(xdr, OP_LAYOUTGET);
	if (status)
		return status;
	p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
	if (unlikely(!p))
		goto out_overflow;
	res->return_on_close = be32_to_cpup(p++);
	p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
	layout_count = be32_to_cpup(p);
	if (!layout_count) {
		dprintk("%s: server responded with empty layout array\n",
			__func__);
		return -EINVAL;
	}

	p = xdr_inline_decode(xdr, 24);
	if (unlikely(!p))
		goto out_overflow;
	p = xdr_decode_hyper(p, &res->range.offset);
	p = xdr_decode_hyper(p, &res->range.length);
	res->range.iomode = be32_to_cpup(p++);
	res->type = be32_to_cpup(p++);

	status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
	if (unlikely(status))
		return status;

	dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
		__func__,
		(unsigned long)res->range.offset,
		(unsigned long)res->range.length,
		res->range.iomode,
		res->type,
		res->layout.len);

	/* nfs4_proc_layoutget allocated a single page */
	if (res->layout.len > PAGE_SIZE)
		return -ENOMEM;
	memcpy(res->layout.buf, p, res->layout.len);

	if (layout_count > 1) {
		/* We only handle a length one array at the moment.  Any
		 * further entries are just ignored.  Note that this means
		 * the client may see a response that is less than the
		 * minimum it requested.
		 */
		dprintk("%s: server responded with %d layouts, dropping tail\n",
			__func__, layout_count);
	}

	return 0;
out_overflow:
	print_overflow_msg(__func__, xdr);
	return -EIO;
}
#endif /* CONFIG_NFS_V4_1 */

5006 5007 5008 5009
/*
 * END OF "GENERIC" DECODE ROUTINES.
 */

L
Linus Torvalds 已提交
5010 5011 5012
/*
 * Decode OPEN_DOWNGRADE response
 */
5013 5014 5015
static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
				       struct nfs_closeres *res)
L
Linus Torvalds 已提交
5016
{
A
Andy Adamson 已提交
5017 5018 5019
	struct compound_hdr hdr;
	int status;

5020
	status = decode_compound_hdr(xdr, &hdr);
5021 5022
	if (status)
		goto out;
5023
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5024 5025
	if (status)
		goto out;
5026
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5027 5028
	if (status)
		goto out;
5029
	status = decode_open_downgrade(xdr, res);
5030 5031
	if (status != 0)
		goto out;
5032
	decode_getfattr(xdr, res->fattr, res->server,
5033
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5034
out:
A
Andy Adamson 已提交
5035
	return status;
L
Linus Torvalds 已提交
5036 5037 5038 5039 5040
}

/*
 * Decode ACCESS response
 */
5041 5042
static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_accessres *res)
L
Linus Torvalds 已提交
5043 5044 5045
{
	struct compound_hdr hdr;
	int status;
5046

5047
	status = decode_compound_hdr(xdr, &hdr);
5048 5049
	if (status)
		goto out;
5050
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5051
	if (status)
L
Linus Torvalds 已提交
5052
		goto out;
5053
	status = decode_putfh(xdr);
5054 5055
	if (status != 0)
		goto out;
5056
	status = decode_access(xdr, res);
5057 5058
	if (status != 0)
		goto out;
5059
	decode_getfattr(xdr, res->fattr, res->server,
5060
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5061 5062 5063 5064 5065 5066 5067
out:
	return status;
}

/*
 * Decode LOOKUP response
 */
5068 5069
static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5070 5071 5072
{
	struct compound_hdr hdr;
	int status;
5073

5074
	status = decode_compound_hdr(xdr, &hdr);
5075 5076
	if (status)
		goto out;
5077
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5078
	if (status)
L
Linus Torvalds 已提交
5079
		goto out;
5080 5081
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5082
		goto out;
5083 5084
	status = decode_lookup(xdr);
	if (status)
L
Linus Torvalds 已提交
5085
		goto out;
5086 5087
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
5088
		goto out;
5089
	status = decode_getfattr(xdr, res->fattr, res->server
5090
			,!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5091 5092 5093 5094 5095 5096 5097
out:
	return status;
}

/*
 * Decode LOOKUP_ROOT response
 */
5098 5099 5100
static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs4_lookup_res *res)
L
Linus Torvalds 已提交
5101 5102 5103
{
	struct compound_hdr hdr;
	int status;
5104

5105
	status = decode_compound_hdr(xdr, &hdr);
5106 5107
	if (status)
		goto out;
5108
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5109
	if (status)
L
Linus Torvalds 已提交
5110
		goto out;
5111 5112
	status = decode_putrootfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5113
		goto out;
5114 5115 5116
	status = decode_getfh(xdr, res->fh);
	if (status == 0)
		status = decode_getfattr(xdr, res->fattr, res->server,
5117
				!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5118 5119 5120 5121 5122 5123 5124
out:
	return status;
}

/*
 * Decode REMOVE response
 */
5125 5126
static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_removeres *res)
L
Linus Torvalds 已提交
5127 5128 5129
{
	struct compound_hdr hdr;
	int status;
5130

5131
	status = decode_compound_hdr(xdr, &hdr);
5132 5133
	if (status)
		goto out;
5134
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5135
	if (status)
L
Linus Torvalds 已提交
5136
		goto out;
5137 5138
	status = decode_putfh(xdr);
	if (status)
5139
		goto out;
5140 5141
	status = decode_remove(xdr, &res->cinfo);
	if (status)
5142
		goto out;
5143
	decode_getfattr(xdr, res->dir_attr, res->server,
5144
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5145 5146 5147 5148 5149 5150 5151
out:
	return status;
}

/*
 * Decode RENAME response
 */
5152 5153
static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_renameres *res)
L
Linus Torvalds 已提交
5154 5155 5156
{
	struct compound_hdr hdr;
	int status;
5157

5158
	status = decode_compound_hdr(xdr, &hdr);
5159 5160
	if (status)
		goto out;
5161
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5162
	if (status)
L
Linus Torvalds 已提交
5163
		goto out;
5164 5165
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5166
		goto out;
5167 5168
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
5169
		goto out;
5170 5171
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5172
		goto out;
5173 5174
	status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
	if (status)
5175 5176
		goto out;
	/* Current FH is target directory */
5177
	if (decode_getfattr(xdr, res->new_fattr, res->server,
5178
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5179
		goto out;
5180 5181
	status = decode_restorefh(xdr);
	if (status)
5182
		goto out;
5183
	decode_getfattr(xdr, res->old_fattr, res->server,
5184
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5185 5186 5187 5188 5189 5190 5191
out:
	return status;
}

/*
 * Decode LINK response
 */
5192 5193
static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs4_link_res *res)
L
Linus Torvalds 已提交
5194 5195 5196
{
	struct compound_hdr hdr;
	int status;
5197

5198
	status = decode_compound_hdr(xdr, &hdr);
5199 5200
	if (status)
		goto out;
5201
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5202
	if (status)
L
Linus Torvalds 已提交
5203
		goto out;
5204 5205
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5206
		goto out;
5207 5208
	status = decode_savefh(xdr);
	if (status)
L
Linus Torvalds 已提交
5209
		goto out;
5210 5211
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5212
		goto out;
5213 5214
	status = decode_link(xdr, &res->cinfo);
	if (status)
5215 5216 5217 5218 5219
		goto out;
	/*
	 * Note order: OP_LINK leaves the directory as the current
	 *             filehandle.
	 */
5220
	if (decode_getfattr(xdr, res->dir_attr, res->server,
5221
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5222
		goto out;
5223 5224
	status = decode_restorefh(xdr);
	if (status)
5225
		goto out;
5226
	decode_getfattr(xdr, res->fattr, res->server,
5227
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5228 5229 5230 5231 5232 5233 5234
out:
	return status;
}

/*
 * Decode CREATE response
 */
5235 5236
static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5237 5238 5239
{
	struct compound_hdr hdr;
	int status;
5240

5241
	status = decode_compound_hdr(xdr, &hdr);
5242 5243
	if (status)
		goto out;
5244
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5245
	if (status)
L
Linus Torvalds 已提交
5246
		goto out;
5247 5248
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5249
		goto out;
5250 5251
	status = decode_savefh(xdr);
	if (status)
5252
		goto out;
5253 5254
	status = decode_create(xdr, &res->dir_cinfo);
	if (status)
L
Linus Torvalds 已提交
5255
		goto out;
5256 5257
	status = decode_getfh(xdr, res->fh);
	if (status)
L
Linus Torvalds 已提交
5258
		goto out;
5259
	if (decode_getfattr(xdr, res->fattr, res->server,
5260
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5261
		goto out;
5262 5263
	status = decode_restorefh(xdr);
	if (status)
5264
		goto out;
5265
	decode_getfattr(xdr, res->dir_fattr, res->server,
5266
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5267 5268 5269 5270 5271 5272 5273
out:
	return status;
}

/*
 * Decode SYMLINK response
 */
5274 5275
static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_create_res *res)
L
Linus Torvalds 已提交
5276
{
5277
	return nfs4_xdr_dec_create(rqstp, xdr, res);
L
Linus Torvalds 已提交
5278 5279 5280 5281 5282
}

/*
 * Decode GETATTR response
 */
5283 5284
static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_getattr_res *res)
L
Linus Torvalds 已提交
5285 5286 5287
{
	struct compound_hdr hdr;
	int status;
5288

5289
	status = decode_compound_hdr(xdr, &hdr);
5290 5291
	if (status)
		goto out;
5292
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5293 5294
	if (status)
		goto out;
5295
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5296 5297
	if (status)
		goto out;
5298
	status = decode_getfattr(xdr, res->fattr, res->server,
5299
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5300 5301 5302 5303
out:
	return status;
}

5304 5305 5306
/*
 * Encode an SETACL request
 */
5307 5308
static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
				struct nfs_setaclargs *args)
5309
{
A
Andy Adamson 已提交
5310
	struct compound_hdr hdr = {
5311
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
A
Andy Adamson 已提交
5312 5313
	};

5314 5315 5316 5317
	encode_compound_hdr(xdr, req, &hdr);
	encode_sequence(xdr, &args->seq_args, &hdr);
	encode_putfh(xdr, args->fh, &hdr);
	encode_setacl(xdr, args, &hdr);
5318
	encode_nops(&hdr);
5319
}
A
Andy Adamson 已提交
5320

5321 5322 5323 5324
/*
 * Decode SETACL response
 */
static int
5325
nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
5326
		    struct nfs_setaclres *res)
5327 5328 5329 5330
{
	struct compound_hdr hdr;
	int status;

5331
	status = decode_compound_hdr(xdr, &hdr);
5332 5333
	if (status)
		goto out;
5334
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5335 5336
	if (status)
		goto out;
5337
	status = decode_putfh(xdr);
5338 5339
	if (status)
		goto out;
5340
	status = decode_setattr(xdr);
5341 5342 5343
out:
	return status;
}
L
Linus Torvalds 已提交
5344

5345 5346 5347 5348
/*
 * Decode GETACL response
 */
static int
5349
nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
B
Benny Halevy 已提交
5350
		    struct nfs_getaclres *res)
5351 5352 5353 5354
{
	struct compound_hdr hdr;
	int status;

5355
	status = decode_compound_hdr(xdr, &hdr);
5356 5357
	if (status)
		goto out;
5358
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5359 5360
	if (status)
		goto out;
5361
	status = decode_putfh(xdr);
5362 5363
	if (status)
		goto out;
5364
	status = decode_getacl(xdr, rqstp, &res->acl_len);
5365 5366 5367 5368 5369

out:
	return status;
}

L
Linus Torvalds 已提交
5370 5371 5372
/*
 * Decode CLOSE response
 */
5373 5374
static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_closeres *res)
L
Linus Torvalds 已提交
5375
{
A
Andy Adamson 已提交
5376 5377 5378
	struct compound_hdr hdr;
	int status;

5379
	status = decode_compound_hdr(xdr, &hdr);
5380 5381
	if (status)
		goto out;
5382
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5383 5384
	if (status)
		goto out;
5385
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5386 5387
	if (status)
		goto out;
5388
	status = decode_close(xdr, res);
5389 5390 5391 5392 5393 5394 5395 5396
	if (status != 0)
		goto out;
	/*
	 * Note: Server may do delete on close for this file
	 * 	in which case the getattr call will fail with
	 * 	an ESTALE error. Shouldn't be a problem,
	 * 	though, since fattr->valid will remain unset.
	 */
5397
	decode_getfattr(xdr, res->fattr, res->server,
5398
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5399
out:
A
Andy Adamson 已提交
5400
	return status;
L
Linus Torvalds 已提交
5401 5402 5403 5404 5405
}

/*
 * Decode OPEN response
 */
5406 5407
static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_openres *res)
L
Linus Torvalds 已提交
5408
{
A
Andy Adamson 已提交
5409 5410 5411
	struct compound_hdr hdr;
	int status;

5412
	status = decode_compound_hdr(xdr, &hdr);
5413 5414
	if (status)
		goto out;
5415
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5416 5417
	if (status)
		goto out;
5418
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5419 5420
	if (status)
		goto out;
5421
	status = decode_savefh(xdr);
A
Andy Adamson 已提交
5422 5423
	if (status)
		goto out;
5424
	status = decode_open(xdr, res);
5425 5426
	if (status)
		goto out;
5427
	if (decode_getfh(xdr, &res->fh) != 0)
L
Linus Torvalds 已提交
5428
		goto out;
5429
	if (decode_getfattr(xdr, res->f_attr, res->server,
5430
				!RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5431
		goto out;
5432
	if (decode_restorefh(xdr) != 0)
5433
		goto out;
5434
	decode_getfattr(xdr, res->dir_attr, res->server,
5435
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5436
out:
A
Andy Adamson 已提交
5437
	return status;
L
Linus Torvalds 已提交
5438 5439 5440 5441 5442
}

/*
 * Decode OPEN_CONFIRM response
 */
5443 5444 5445
static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
				     struct xdr_stream *xdr,
				     struct nfs_open_confirmres *res)
L
Linus Torvalds 已提交
5446
{
A
Andy Adamson 已提交
5447 5448 5449
	struct compound_hdr hdr;
	int status;

5450
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
5451 5452
	if (status)
		goto out;
5453
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5454 5455
	if (status)
		goto out;
5456
	status = decode_open_confirm(xdr, res);
L
Linus Torvalds 已提交
5457
out:
A
Andy Adamson 已提交
5458
	return status;
L
Linus Torvalds 已提交
5459 5460 5461 5462 5463
}

/*
 * Decode OPEN response
 */
5464 5465 5466
static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs_openres *res)
L
Linus Torvalds 已提交
5467
{
A
Andy Adamson 已提交
5468 5469 5470
	struct compound_hdr hdr;
	int status;

5471
	status = decode_compound_hdr(xdr, &hdr);
5472 5473
	if (status)
		goto out;
5474
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5475 5476
	if (status)
		goto out;
5477
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5478 5479
	if (status)
		goto out;
5480
	status = decode_open(xdr, res);
A
Andy Adamson 已提交
5481 5482
	if (status)
		goto out;
5483
	decode_getfattr(xdr, res->f_attr, res->server,
5484
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5485
out:
A
Andy Adamson 已提交
5486
	return status;
L
Linus Torvalds 已提交
5487 5488 5489 5490 5491
}

/*
 * Decode SETATTR response
 */
5492 5493 5494
static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
				struct xdr_stream *xdr,
				struct nfs_setattrres *res)
L
Linus Torvalds 已提交
5495
{
A
Andy Adamson 已提交
5496 5497 5498
	struct compound_hdr hdr;
	int status;

5499
	status = decode_compound_hdr(xdr, &hdr);
5500 5501
	if (status)
		goto out;
5502
	status = decode_sequence(xdr, &res->seq_res, rqstp);
A
Andy Adamson 已提交
5503 5504
	if (status)
		goto out;
5505
	status = decode_putfh(xdr);
A
Andy Adamson 已提交
5506 5507
	if (status)
		goto out;
5508
	status = decode_setattr(xdr);
A
Andy Adamson 已提交
5509 5510
	if (status)
		goto out;
5511
	decode_getfattr(xdr, res->fattr, res->server,
5512
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5513
out:
A
Andy Adamson 已提交
5514
	return status;
L
Linus Torvalds 已提交
5515 5516 5517 5518 5519
}

/*
 * Decode LOCK response
 */
5520 5521
static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_lock_res *res)
L
Linus Torvalds 已提交
5522 5523 5524 5525
{
	struct compound_hdr hdr;
	int status;

5526
	status = decode_compound_hdr(xdr, &hdr);
5527 5528
	if (status)
		goto out;
5529
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5530 5531
	if (status)
		goto out;
5532
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5533 5534
	if (status)
		goto out;
5535
	status = decode_lock(xdr, res);
L
Linus Torvalds 已提交
5536 5537 5538 5539 5540 5541 5542
out:
	return status;
}

/*
 * Decode LOCKT response
 */
5543 5544
static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_lockt_res *res)
L
Linus Torvalds 已提交
5545 5546 5547 5548
{
	struct compound_hdr hdr;
	int status;

5549
	status = decode_compound_hdr(xdr, &hdr);
5550 5551
	if (status)
		goto out;
5552
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5553 5554
	if (status)
		goto out;
5555
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5556 5557
	if (status)
		goto out;
5558
	status = decode_lockt(xdr, res);
L
Linus Torvalds 已提交
5559 5560 5561 5562 5563 5564 5565
out:
	return status;
}

/*
 * Decode LOCKU response
 */
5566 5567
static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_locku_res *res)
L
Linus Torvalds 已提交
5568 5569 5570 5571
{
	struct compound_hdr hdr;
	int status;

5572
	status = decode_compound_hdr(xdr, &hdr);
5573 5574
	if (status)
		goto out;
5575
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5576 5577
	if (status)
		goto out;
5578
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5579 5580
	if (status)
		goto out;
5581
	status = decode_locku(xdr, res);
L
Linus Torvalds 已提交
5582 5583 5584 5585
out:
	return status;
}

5586 5587
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
					  struct xdr_stream *xdr, void *dummy)
5588 5589 5590 5591
{
	struct compound_hdr hdr;
	int status;

5592
	status = decode_compound_hdr(xdr, &hdr);
5593
	if (!status)
5594
		status = decode_release_lockowner(xdr);
5595 5596 5597
	return status;
}

L
Linus Torvalds 已提交
5598 5599 5600
/*
 * Decode READLINK response
 */
5601 5602
static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
B
Benny Halevy 已提交
5603
				 struct nfs4_readlink_res *res)
L
Linus Torvalds 已提交
5604 5605 5606 5607
{
	struct compound_hdr hdr;
	int status;

5608
	status = decode_compound_hdr(xdr, &hdr);
5609 5610
	if (status)
		goto out;
5611
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5612 5613
	if (status)
		goto out;
5614
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5615 5616
	if (status)
		goto out;
5617
	status = decode_readlink(xdr, rqstp);
L
Linus Torvalds 已提交
5618 5619 5620 5621 5622 5623 5624
out:
	return status;
}

/*
 * Decode READDIR response
 */
5625 5626
static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
				struct nfs4_readdir_res *res)
L
Linus Torvalds 已提交
5627 5628 5629 5630
{
	struct compound_hdr hdr;
	int status;

5631
	status = decode_compound_hdr(xdr, &hdr);
5632 5633
	if (status)
		goto out;
5634
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5635 5636
	if (status)
		goto out;
5637
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5638 5639
	if (status)
		goto out;
5640
	status = decode_readdir(xdr, rqstp, res);
L
Linus Torvalds 已提交
5641 5642 5643 5644 5645 5646 5647
out:
	return status;
}

/*
 * Decode Read response
 */
5648 5649
static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			     struct nfs_readres *res)
L
Linus Torvalds 已提交
5650 5651 5652 5653
{
	struct compound_hdr hdr;
	int status;

5654
	status = decode_compound_hdr(xdr, &hdr);
5655 5656
	if (status)
		goto out;
5657
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5658 5659
	if (status)
		goto out;
5660
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5661 5662
	if (status)
		goto out;
5663
	status = decode_read(xdr, rqstp, res);
L
Linus Torvalds 已提交
5664 5665 5666 5667 5668 5669 5670 5671 5672
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode WRITE response
 */
5673 5674
static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      struct nfs_writeres *res)
L
Linus Torvalds 已提交
5675 5676 5677 5678
{
	struct compound_hdr hdr;
	int status;

5679
	status = decode_compound_hdr(xdr, &hdr);
5680 5681
	if (status)
		goto out;
5682
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5683 5684
	if (status)
		goto out;
5685
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5686 5687
	if (status)
		goto out;
5688
	status = decode_write(xdr, res);
5689 5690
	if (status)
		goto out;
5691
	decode_getfattr(xdr, res->fattr, res->server,
5692
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5693 5694 5695 5696 5697 5698 5699 5700 5701
	if (!status)
		status = res->count;
out:
	return status;
}

/*
 * Decode COMMIT response
 */
5702 5703
static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			       struct nfs_writeres *res)
L
Linus Torvalds 已提交
5704 5705 5706 5707
{
	struct compound_hdr hdr;
	int status;

5708
	status = decode_compound_hdr(xdr, &hdr);
5709 5710
	if (status)
		goto out;
5711
	status = decode_sequence(xdr, &res->seq_res, rqstp);
L
Linus Torvalds 已提交
5712 5713
	if (status)
		goto out;
5714
	status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5715 5716
	if (status)
		goto out;
5717
	status = decode_commit(xdr, res);
5718 5719
	if (status)
		goto out;
5720
	decode_getfattr(xdr, res->fattr, res->server,
5721
			!RPC_IS_ASYNC(rqstp->rq_task));
L
Linus Torvalds 已提交
5722 5723 5724 5725 5726
out:
	return status;
}

/*
5727
 * Decode FSINFO response
L
Linus Torvalds 已提交
5728
 */
5729
static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
5730
			       struct nfs4_fsinfo_res *res)
L
Linus Torvalds 已提交
5731 5732 5733 5734
{
	struct compound_hdr hdr;
	int status;

5735
	status = decode_compound_hdr(xdr, &hdr);
5736
	if (!status)
5737
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5738
	if (!status)
5739
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5740
	if (!status)
5741
		status = decode_fsinfo(xdr, res->fsinfo);
L
Linus Torvalds 已提交
5742 5743 5744 5745
	return status;
}

/*
5746
 * Decode PATHCONF response
L
Linus Torvalds 已提交
5747
 */
5748
static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
5749
				 struct nfs4_pathconf_res *res)
L
Linus Torvalds 已提交
5750 5751 5752 5753
{
	struct compound_hdr hdr;
	int status;

5754
	status = decode_compound_hdr(xdr, &hdr);
5755
	if (!status)
5756
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5757
	if (!status)
5758
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5759
	if (!status)
5760
		status = decode_pathconf(xdr, res->pathconf);
L
Linus Torvalds 已提交
5761 5762 5763 5764
	return status;
}

/*
5765
 * Decode STATFS response
L
Linus Torvalds 已提交
5766
 */
5767
static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
B
Benny Halevy 已提交
5768
			       struct nfs4_statfs_res *res)
L
Linus Torvalds 已提交
5769 5770 5771 5772
{
	struct compound_hdr hdr;
	int status;

5773
	status = decode_compound_hdr(xdr, &hdr);
5774
	if (!status)
5775
		status = decode_sequence(xdr, &res->seq_res, req);
L
Linus Torvalds 已提交
5776
	if (!status)
5777
		status = decode_putfh(xdr);
L
Linus Torvalds 已提交
5778
	if (!status)
5779
		status = decode_statfs(xdr, res->fsstat);
L
Linus Torvalds 已提交
5780 5781 5782 5783
	return status;
}

/*
5784
 * Decode GETATTR_BITMAP response
L
Linus Torvalds 已提交
5785
 */
5786 5787 5788
static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    struct nfs4_server_caps_res *res)
L
Linus Torvalds 已提交
5789 5790 5791 5792
{
	struct compound_hdr hdr;
	int status;

5793
	status = decode_compound_hdr(xdr, &hdr);
5794 5795
	if (status)
		goto out;
5796
	status = decode_sequence(xdr, &res->seq_res, req);
5797
	if (status)
L
Linus Torvalds 已提交
5798
		goto out;
5799 5800
	status = decode_putfh(xdr);
	if (status)
L
Linus Torvalds 已提交
5801
		goto out;
5802
	status = decode_server_caps(xdr, res);
L
Linus Torvalds 已提交
5803 5804 5805 5806 5807 5808 5809
out:
	return status;
}

/*
 * Decode RENEW response
 */
5810 5811
static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
			      void *__unused)
L
Linus Torvalds 已提交
5812 5813 5814 5815
{
	struct compound_hdr hdr;
	int status;

5816
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
5817
	if (!status)
5818
		status = decode_renew(xdr);
L
Linus Torvalds 已提交
5819 5820 5821 5822
	return status;
}

/*
5823
 * Decode SETCLIENTID response
L
Linus Torvalds 已提交
5824
 */
5825 5826 5827
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
				    struct xdr_stream *xdr,
				    struct nfs4_setclientid_res *res)
L
Linus Torvalds 已提交
5828 5829 5830 5831
{
	struct compound_hdr hdr;
	int status;

5832
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
5833
	if (!status)
5834
		status = decode_setclientid(xdr, res);
L
Linus Torvalds 已提交
5835 5836 5837 5838
	return status;
}

/*
5839
 * Decode SETCLIENTID_CONFIRM response
L
Linus Torvalds 已提交
5840
 */
5841 5842 5843
static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
					    struct xdr_stream *xdr,
					    struct nfs_fsinfo *fsinfo)
L
Linus Torvalds 已提交
5844 5845 5846 5847
{
	struct compound_hdr hdr;
	int status;

5848
	status = decode_compound_hdr(xdr, &hdr);
L
Linus Torvalds 已提交
5849
	if (!status)
5850
		status = decode_setclientid_confirm(xdr);
L
Linus Torvalds 已提交
5851
	if (!status)
5852
		status = decode_putrootfh(xdr);
L
Linus Torvalds 已提交
5853
	if (!status)
5854
		status = decode_fsinfo(xdr, fsinfo);
L
Linus Torvalds 已提交
5855 5856 5857 5858
	return status;
}

/*
5859
 * Decode DELEGRETURN response
L
Linus Torvalds 已提交
5860
 */
5861 5862 5863
static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
				    struct nfs4_delegreturnres *res)
L
Linus Torvalds 已提交
5864 5865 5866 5867
{
	struct compound_hdr hdr;
	int status;

5868
	status = decode_compound_hdr(xdr, &hdr);
5869 5870
	if (status)
		goto out;
5871
	status = decode_sequence(xdr, &res->seq_res, rqstp);
5872
	if (status)
5873
		goto out;
5874
	status = decode_putfh(xdr);
5875 5876
	if (status != 0)
		goto out;
5877
	status = decode_delegreturn(xdr);
5878 5879
	if (status != 0)
		goto out;
5880
	decode_getfattr(xdr, res->fattr, res->server,
5881
			!RPC_IS_ASYNC(rqstp->rq_task));
5882
out:
L
Linus Torvalds 已提交
5883 5884 5885
	return status;
}

5886
/*
5887
 * Decode FS_LOCATIONS response
5888
 */
5889 5890
static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
				     struct xdr_stream *xdr,
B
Benny Halevy 已提交
5891
				     struct nfs4_fs_locations_res *res)
5892 5893 5894 5895
{
	struct compound_hdr hdr;
	int status;

5896
	status = decode_compound_hdr(xdr, &hdr);
5897 5898
	if (status)
		goto out;
5899
	status = decode_sequence(xdr, &res->seq_res, req);
5900
	if (status)
5901
		goto out;
5902 5903
	status = decode_putfh(xdr);
	if (status)
5904
		goto out;
5905 5906
	status = decode_lookup(xdr);
	if (status)
5907
		goto out;
5908 5909
	xdr_enter_page(xdr, PAGE_SIZE);
	status = decode_getfattr(xdr, &res->fs_locations->fattr,
5910 5911
				 res->fs_locations->server,
				 !RPC_IS_ASYNC(req->rq_task));
5912 5913 5914 5915
out:
	return status;
}

B
Benny Halevy 已提交
5916 5917
#if defined(CONFIG_NFS_V4_1)
/*
5918
 * Decode EXCHANGE_ID response
B
Benny Halevy 已提交
5919
 */
5920 5921
static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
				    struct xdr_stream *xdr,
B
Benny Halevy 已提交
5922 5923 5924 5925 5926
				    void *res)
{
	struct compound_hdr hdr;
	int status;

5927
	status = decode_compound_hdr(xdr, &hdr);
B
Benny Halevy 已提交
5928
	if (!status)
5929
		status = decode_exchange_id(xdr, res);
B
Benny Halevy 已提交
5930 5931
	return status;
}
A
Andy Adamson 已提交
5932

A
Andy Adamson 已提交
5933
/*
5934
 * Decode CREATE_SESSION response
A
Andy Adamson 已提交
5935
 */
5936 5937
static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
5938 5939 5940 5941 5942
				       struct nfs41_create_session_res *res)
{
	struct compound_hdr hdr;
	int status;

5943
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
5944
	if (!status)
5945
		status = decode_create_session(xdr, res);
A
Andy Adamson 已提交
5946 5947 5948
	return status;
}

A
Andy Adamson 已提交
5949
/*
5950
 * Decode DESTROY_SESSION response
A
Andy Adamson 已提交
5951
 */
5952 5953 5954
static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
					struct xdr_stream *xdr,
					void *res)
A
Andy Adamson 已提交
5955 5956 5957 5958
{
	struct compound_hdr hdr;
	int status;

5959
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
5960
	if (!status)
5961
		status = decode_destroy_session(xdr, res);
A
Andy Adamson 已提交
5962 5963 5964
	return status;
}

A
Andy Adamson 已提交
5965
/*
5966
 * Decode SEQUENCE response
A
Andy Adamson 已提交
5967
 */
5968 5969
static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
				 struct xdr_stream *xdr,
A
Andy Adamson 已提交
5970 5971 5972 5973 5974
				 struct nfs4_sequence_res *res)
{
	struct compound_hdr hdr;
	int status;

5975
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
5976
	if (!status)
5977
		status = decode_sequence(xdr, res, rqstp);
A
Andy Adamson 已提交
5978 5979 5980
	return status;
}

A
Andy Adamson 已提交
5981
/*
5982
 * Decode GET_LEASE_TIME response
A
Andy Adamson 已提交
5983
 */
5984 5985
static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
				       struct xdr_stream *xdr,
A
Andy Adamson 已提交
5986 5987 5988 5989 5990
				       struct nfs4_get_lease_time_res *res)
{
	struct compound_hdr hdr;
	int status;

5991
	status = decode_compound_hdr(xdr, &hdr);
A
Andy Adamson 已提交
5992
	if (!status)
5993
		status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
A
Andy Adamson 已提交
5994
	if (!status)
5995
		status = decode_putrootfh(xdr);
A
Andy Adamson 已提交
5996
	if (!status)
5997
		status = decode_fsinfo(xdr, res->lr_fsinfo);
A
Andy Adamson 已提交
5998 5999
	return status;
}
6000 6001 6002 6003

/*
 * Decode RECLAIM_COMPLETE response
 */
6004 6005
static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
					 struct xdr_stream *xdr,
6006 6007 6008 6009 6010
					 struct nfs41_reclaim_complete_res *res)
{
	struct compound_hdr hdr;
	int status;

6011
	status = decode_compound_hdr(xdr, &hdr);
6012
	if (!status)
6013
		status = decode_sequence(xdr, &res->seq_res, rqstp);
6014
	if (!status)
6015
		status = decode_reclaim_complete(xdr, (void *)NULL);
6016 6017
	return status;
}
6018 6019 6020 6021

/*
 * Decode GETDEVINFO response
 */
6022 6023
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
				      struct xdr_stream *xdr,
6024 6025 6026 6027 6028
				      struct nfs4_getdeviceinfo_res *res)
{
	struct compound_hdr hdr;
	int status;

6029
	status = decode_compound_hdr(xdr, &hdr);
6030 6031
	if (status != 0)
		goto out;
6032
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6033 6034
	if (status != 0)
		goto out;
6035
	status = decode_getdeviceinfo(xdr, res->pdev);
6036 6037 6038 6039 6040 6041 6042
out:
	return status;
}

/*
 * Decode LAYOUTGET response
 */
6043 6044
static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
				  struct xdr_stream *xdr,
6045 6046 6047 6048 6049
				  struct nfs4_layoutget_res *res)
{
	struct compound_hdr hdr;
	int status;

6050
	status = decode_compound_hdr(xdr, &hdr);
6051 6052
	if (status)
		goto out;
6053
	status = decode_sequence(xdr, &res->seq_res, rqstp);
6054 6055
	if (status)
		goto out;
6056
	status = decode_putfh(xdr);
6057 6058
	if (status)
		goto out;
6059
	status = decode_layoutget(xdr, rqstp, res);
6060 6061 6062
out:
	return status;
}
B
Benny Halevy 已提交
6063 6064
#endif /* CONFIG_NFS_V4_1 */

6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080
/**
 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
 *                      the local page cache.
 * @xdr: XDR stream where entry resides
 * @entry: buffer to fill in with entry data
 * @plus: boolean indicating whether this should be a readdirplus entry
 *
 * Returns zero if successful, otherwise a negative errno value is
 * returned.
 *
 * This function is not invoked during READDIR reply decoding, but
 * rather whenever an application invokes the getdents(2) system call
 * on a directory already in our cache.
 */
int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
		       int plus)
L
Linus Torvalds 已提交
6081 6082 6083
{
	uint32_t bitmap[2] = {0};
	uint32_t len;
6084 6085 6086 6087 6088 6089 6090 6091
	__be32 *p = xdr_inline_decode(xdr, 4);
	if (unlikely(!p))
		goto out_overflow;
	if (!ntohl(*p++)) {
		p = xdr_inline_decode(xdr, 4);
		if (unlikely(!p))
			goto out_overflow;
		if (!ntohl(*p++))
6092
			return -EAGAIN;
L
Linus Torvalds 已提交
6093
		entry->eof = 1;
6094
		return -EBADCOOKIE;
L
Linus Torvalds 已提交
6095 6096
	}

6097 6098 6099
	p = xdr_inline_decode(xdr, 12);
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
6100 6101 6102
	entry->prev_cookie = entry->cookie;
	p = xdr_decode_hyper(p, &entry->cookie);
	entry->len = ntohl(*p++);
6103

6104
	p = xdr_inline_decode(xdr, entry->len);
6105 6106
	if (unlikely(!p))
		goto out_overflow;
L
Linus Torvalds 已提交
6107 6108 6109 6110 6111 6112 6113 6114
	entry->name = (const char *) p;

	/*
	 * In case the server doesn't return an inode number,
	 * we fake one here.  (We don't use inode number 0,
	 * since glibc seems to choke on it...)
	 */
	entry->ino = 1;
6115
	entry->fattr->valid = 0;
L
Linus Torvalds 已提交
6116

6117 6118 6119 6120 6121 6122
	if (decode_attr_bitmap(xdr, bitmap) < 0)
		goto out_overflow;

	if (decode_attr_length(xdr, &len, &p) < 0)
		goto out_overflow;

6123 6124
	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
					entry->server, 1) < 0)
6125 6126 6127 6128
		goto out_overflow;
	if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
		entry->ino = entry->fattr->fileid;

6129 6130 6131 6132
	entry->d_type = DT_UNKNOWN;
	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);

6133
	if (verify_attr_len(xdr, p, len) < 0)
6134
		goto out_overflow;
L
Linus Torvalds 已提交
6135

6136 6137 6138 6139 6140 6141
	p = xdr_inline_peek(xdr, 8);
	if (p != NULL)
		entry->eof = !p[0] && p[1];
	else
		entry->eof = 0;

6142
	return 0;
6143 6144 6145

out_overflow:
	print_overflow_msg(__func__, xdr);
6146
	return -EAGAIN;
L
Linus Torvalds 已提交
6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157
}

/*
 * We need to translate between nfs status return values and
 * the local errno values which may not be the same.
 */
static struct {
	int stat;
	int errno;
} nfs_errtbl[] = {
	{ NFS4_OK,		0		},
6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180 6181
	{ NFS4ERR_PERM,		-EPERM		},
	{ NFS4ERR_NOENT,	-ENOENT		},
	{ NFS4ERR_IO,		-errno_NFSERR_IO},
	{ NFS4ERR_NXIO,		-ENXIO		},
	{ NFS4ERR_ACCESS,	-EACCES		},
	{ NFS4ERR_EXIST,	-EEXIST		},
	{ NFS4ERR_XDEV,		-EXDEV		},
	{ NFS4ERR_NOTDIR,	-ENOTDIR	},
	{ NFS4ERR_ISDIR,	-EISDIR		},
	{ NFS4ERR_INVAL,	-EINVAL		},
	{ NFS4ERR_FBIG,		-EFBIG		},
	{ NFS4ERR_NOSPC,	-ENOSPC		},
	{ NFS4ERR_ROFS,		-EROFS		},
	{ NFS4ERR_MLINK,	-EMLINK		},
	{ NFS4ERR_NAMETOOLONG,	-ENAMETOOLONG	},
	{ NFS4ERR_NOTEMPTY,	-ENOTEMPTY	},
	{ NFS4ERR_DQUOT,	-EDQUOT		},
	{ NFS4ERR_STALE,	-ESTALE		},
	{ NFS4ERR_BADHANDLE,	-EBADHANDLE	},
	{ NFS4ERR_BADOWNER,	-EINVAL		},
	{ NFS4ERR_BADNAME,	-EINVAL		},
	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
6182
	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
6183 6184 6185 6186 6187 6188
	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
	{ NFS4ERR_LOCKED,	-EAGAIN		},
	{ NFS4ERR_SYMLINK,	-ELOOP		},
	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
	{ NFS4ERR_WRONGSEC,	-EPERM		}, /* FIXME: this needs
L
Linus Torvalds 已提交
6189 6190 6191
						    * to be handled by a
						    * middle-layer.
						    */
6192
	{ -1,			-EIO		}
L
Linus Torvalds 已提交
6193 6194 6195 6196 6197 6198 6199
};

/*
 * Convert an NFS error code to a local one.
 * This one is used jointly by NFSv2 and NFSv3.
 */
static int
6200
nfs4_stat_to_errno(int stat)
L
Linus Torvalds 已提交
6201 6202 6203 6204 6205 6206 6207 6208
{
	int i;
	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
		if (nfs_errtbl[i].stat == stat)
			return nfs_errtbl[i].errno;
	}
	if (stat <= 10000 || stat > 10100) {
		/* The server is looney tunes. */
6209
		return -EREMOTEIO;
L
Linus Torvalds 已提交
6210 6211 6212 6213 6214 6215
	}
	/* If we cannot translate the error, the recovery routines should
	 * handle it.
	 * Note: remaining NFSv4 error codes have values > 10000, so should
	 * not conflict with native Linux error codes.
	 */
6216
	return -stat;
L
Linus Torvalds 已提交
6217 6218 6219 6220 6221
}

#define PROC(proc, argtype, restype)				\
[NFSPROC4_CLNT_##proc] = {					\
	.p_proc   = NFSPROC4_COMPOUND,				\
6222
	.p_encode = (kxdreproc_t)nfs4_xdr_##argtype,		\
6223
	.p_decode = (kxdrdproc_t)nfs4_xdr_##restype,		\
6224 6225
	.p_arglen = NFS4_##argtype##_sz,			\
	.p_replen = NFS4_##restype##_sz,			\
6226 6227
	.p_statidx = NFSPROC4_CLNT_##proc,			\
	.p_name   = #proc,					\
A
Andy Adamson 已提交
6228
}
L
Linus Torvalds 已提交
6229 6230

struct rpc_procinfo	nfs4_procedures[] = {
6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265
	PROC(READ,		enc_read,		dec_read),
	PROC(WRITE,		enc_write,		dec_write),
	PROC(COMMIT,		enc_commit,		dec_commit),
	PROC(OPEN,		enc_open,		dec_open),
	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
	PROC(CLOSE,		enc_close,		dec_close),
	PROC(SETATTR,		enc_setattr,		dec_setattr),
	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
	PROC(RENEW,		enc_renew,		dec_renew),
	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
	PROC(LOCK,		enc_lock,		dec_lock),
	PROC(LOCKT,		enc_lockt,		dec_lockt),
	PROC(LOCKU,		enc_locku,		dec_locku),
	PROC(ACCESS,		enc_access,		dec_access),
	PROC(GETATTR,		enc_getattr,		dec_getattr),
	PROC(LOOKUP,		enc_lookup,		dec_lookup),
	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
	PROC(REMOVE,		enc_remove,		dec_remove),
	PROC(RENAME,		enc_rename,		dec_rename),
	PROC(LINK,		enc_link,		dec_link),
	PROC(SYMLINK,		enc_symlink,		dec_symlink),
	PROC(CREATE,		enc_create,		dec_create),
	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
	PROC(STATFS,		enc_statfs,		dec_statfs),
	PROC(READLINK,		enc_readlink,		dec_readlink),
	PROC(READDIR,		enc_readdir,		dec_readdir),
	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
	PROC(GETACL,		enc_getacl,		dec_getacl),
	PROC(SETACL,		enc_setacl,		dec_setacl),
	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
B
Benny Halevy 已提交
6266
#if defined(CONFIG_NFS_V4_1)
6267 6268 6269 6270 6271 6272 6273 6274
	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
	PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
	PROC(SEQUENCE,		enc_sequence,		dec_sequence),
	PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
	PROC(RECLAIM_COMPLETE,	enc_reclaim_complete,	dec_reclaim_complete),
	PROC(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
	PROC(LAYOUTGET,		enc_layoutget,		dec_layoutget),
B
Benny Halevy 已提交
6275
#endif /* CONFIG_NFS_V4_1 */
L
Linus Torvalds 已提交
6276 6277 6278 6279
};

struct rpc_version		nfs_version4 = {
	.number			= 4,
6280
	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
L
Linus Torvalds 已提交
6281 6282 6283 6284 6285 6286 6287 6288
	.procs			= nfs4_procedures
};

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */