1/*
2 *  fs/nfs/nfs4xdr.c
3 *
4 *  Client-side XDR for NFSv4.
5 *
6 *  Copyright (c) 2002 The Regents of the University of Michigan.
7 *  All rights reserved.
8 *
9 *  Kendrick Smith <kmsmith@umich.edu>
10 *  Andy Adamson   <andros@umich.edu>
11 *
12 *  Redistribution and use in source and binary forms, with or without
13 *  modification, are permitted provided that the following conditions
14 *  are met:
15 *
16 *  1. Redistributions of source code must retain the above copyright
17 *     notice, this list of conditions and the following disclaimer.
18 *  2. Redistributions in binary form must reproduce the above copyright
19 *     notice, this list of conditions and the following disclaimer in the
20 *     documentation and/or other materials provided with the distribution.
21 *  3. Neither the name of the University nor the names of its
22 *     contributors may be used to endorse or promote products derived
23 *     from this software without specific prior written permission.
24 *
25 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/param.h>
39#include <linux/time.h>
40#include <linux/mm.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/in.h>
44#include <linux/pagemap.h>
45#include <linux/proc_fs.h>
46#include <linux/kdev_t.h>
47#include <linux/module.h>
48#include <linux/utsname.h>
49#include <linux/sunrpc/clnt.h>
50#include <linux/sunrpc/msg_prot.h>
51#include <linux/sunrpc/gss_api.h>
52#include <linux/nfs.h>
53#include <linux/nfs4.h>
54#include <linux/nfs_fs.h>
55
56#include "nfs4_fs.h"
57#include "internal.h"
58#include "nfs4idmap.h"
59#include "nfs4session.h"
60#include "pnfs.h"
61#include "netns.h"
62
63#define NFSDBG_FACILITY		NFSDBG_XDR
64
65/* Mapping from NFS error code to "errno" error code. */
66#define errno_NFSERR_IO		EIO
67
68static int nfs4_stat_to_errno(int);
69
70/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71#ifdef DEBUG
72#define NFS4_MAXTAGLEN		20
73#else
74#define NFS4_MAXTAGLEN		0
75#endif
76
77/* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
79 */
80#define open_owner_id_maxsz	(1 + 2 + 1 + 1 + 2)
81#define lock_owner_id_maxsz	(1 + 1 + 4)
82#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
83#define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
84#define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
85#define op_encode_hdr_maxsz	(1)
86#define op_decode_hdr_maxsz	(2)
87#define encode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
88#define decode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
89#define encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90#define decode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91#define encode_putfh_maxsz	(op_encode_hdr_maxsz + 1 + \
92				(NFS4_FHSIZE >> 2))
93#define decode_putfh_maxsz	(op_decode_hdr_maxsz)
94#define encode_putrootfh_maxsz	(op_encode_hdr_maxsz)
95#define decode_putrootfh_maxsz	(op_decode_hdr_maxsz)
96#define encode_getfh_maxsz      (op_encode_hdr_maxsz)
97#define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
98				((3+NFS4_FHSIZE) >> 2))
99#define nfs4_fattr_bitmap_maxsz 4
100#define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101#define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102#define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
104#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107#define	nfs4_label_maxsz	(4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108#else
109#define	nfs4_label_maxsz	0
110#endif
111/* We support only one layout type per file system */
112#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113/* This is based on getfattr, which uses the most attributes: */
114#define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115				3 + 3 + 3 + nfs4_owner_maxsz + \
116				nfs4_group_maxsz + nfs4_label_maxsz + \
117				 decode_mdsthreshold_maxsz))
118#define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
119				nfs4_fattr_value_maxsz)
120#define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121#define encode_attrs_maxsz	(nfs4_fattr_bitmap_maxsz + \
122				 1 + 2 + 1 + \
123				nfs4_owner_maxsz + \
124				nfs4_group_maxsz + \
125				nfs4_label_maxsz + \
126				4 + 4)
127#define encode_savefh_maxsz     (op_encode_hdr_maxsz)
128#define decode_savefh_maxsz     (op_decode_hdr_maxsz)
129#define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
130#define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
131#define encode_fsinfo_maxsz	(encode_getattr_maxsz)
132/* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135#define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + \
136				 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137#define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
138#define decode_renew_maxsz	(op_decode_hdr_maxsz)
139#define encode_setclientid_maxsz \
140				(op_encode_hdr_maxsz + \
141				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142				XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143				1 /* sc_prog */ + \
144				1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145				1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146				1) /* sc_cb_ident */
147#define decode_setclientid_maxsz \
148				(op_decode_hdr_maxsz + \
149				2 /* clientid */ + \
150				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
151				1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
152				1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
153#define encode_setclientid_confirm_maxsz \
154				(op_encode_hdr_maxsz + \
155				3 + (NFS4_VERIFIER_SIZE >> 2))
156#define decode_setclientid_confirm_maxsz \
157				(op_decode_hdr_maxsz)
158#define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
159#define decode_lookup_maxsz	(op_decode_hdr_maxsz)
160#define encode_share_access_maxsz \
161				(2)
162#define encode_createmode_maxsz	(1 + encode_attrs_maxsz + encode_verifier_maxsz)
163#define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
164#define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
165#define encode_open_maxsz	(op_encode_hdr_maxsz + \
166				2 + encode_share_access_maxsz + 2 + \
167				open_owner_id_maxsz + \
168				encode_opentype_maxsz + \
169				encode_claim_null_maxsz)
170#define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
171#define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
172				decode_ace_maxsz)
173#define decode_change_info_maxsz	(5)
174#define decode_open_maxsz	(op_decode_hdr_maxsz + \
175				decode_stateid_maxsz + \
176				decode_change_info_maxsz + 1 + \
177				nfs4_fattr_bitmap_maxsz + \
178				decode_delegation_maxsz)
179#define encode_open_confirm_maxsz \
180				(op_encode_hdr_maxsz + \
181				 encode_stateid_maxsz + 1)
182#define decode_open_confirm_maxsz \
183				(op_decode_hdr_maxsz + \
184				 decode_stateid_maxsz)
185#define encode_open_downgrade_maxsz \
186				(op_encode_hdr_maxsz + \
187				 encode_stateid_maxsz + 1 + \
188				 encode_share_access_maxsz)
189#define decode_open_downgrade_maxsz \
190				(op_decode_hdr_maxsz + \
191				 decode_stateid_maxsz)
192#define encode_close_maxsz	(op_encode_hdr_maxsz + \
193				 1 + encode_stateid_maxsz)
194#define decode_close_maxsz	(op_decode_hdr_maxsz + \
195				 decode_stateid_maxsz)
196#define encode_setattr_maxsz	(op_encode_hdr_maxsz + \
197				 encode_stateid_maxsz + \
198				 encode_attrs_maxsz)
199#define decode_setattr_maxsz	(op_decode_hdr_maxsz + \
200				 nfs4_fattr_bitmap_maxsz)
201#define encode_read_maxsz	(op_encode_hdr_maxsz + \
202				 encode_stateid_maxsz + 3)
203#define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
204#define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
205				 2 + encode_verifier_maxsz + 5 + \
206				nfs4_label_maxsz)
207#define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
208				 decode_verifier_maxsz)
209#define encode_readlink_maxsz	(op_encode_hdr_maxsz)
210#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
211#define encode_write_maxsz	(op_encode_hdr_maxsz + \
212				 encode_stateid_maxsz + 4)
213#define decode_write_maxsz	(op_decode_hdr_maxsz + \
214				 2 + decode_verifier_maxsz)
215#define encode_commit_maxsz	(op_encode_hdr_maxsz + 3)
216#define decode_commit_maxsz	(op_decode_hdr_maxsz + \
217				 decode_verifier_maxsz)
218#define encode_remove_maxsz	(op_encode_hdr_maxsz + \
219				nfs4_name_maxsz)
220#define decode_remove_maxsz	(op_decode_hdr_maxsz + \
221				 decode_change_info_maxsz)
222#define encode_rename_maxsz	(op_encode_hdr_maxsz + \
223				2 * nfs4_name_maxsz)
224#define decode_rename_maxsz	(op_decode_hdr_maxsz + \
225				 decode_change_info_maxsz + \
226				 decode_change_info_maxsz)
227#define encode_link_maxsz	(op_encode_hdr_maxsz + \
228				nfs4_name_maxsz)
229#define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
230#define encode_lockowner_maxsz	(7)
231#define encode_lock_maxsz	(op_encode_hdr_maxsz + \
232				 7 + \
233				 1 + encode_stateid_maxsz + 1 + \
234				 encode_lockowner_maxsz)
235#define decode_lock_denied_maxsz \
236				(8 + decode_lockowner_maxsz)
237#define decode_lock_maxsz	(op_decode_hdr_maxsz + \
238				 decode_lock_denied_maxsz)
239#define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
240				encode_lockowner_maxsz)
241#define decode_lockt_maxsz	(op_decode_hdr_maxsz + \
242				 decode_lock_denied_maxsz)
243#define encode_locku_maxsz	(op_encode_hdr_maxsz + 3 + \
244				 encode_stateid_maxsz + \
245				 4)
246#define decode_locku_maxsz	(op_decode_hdr_maxsz + \
247				 decode_stateid_maxsz)
248#define encode_release_lockowner_maxsz \
249				(op_encode_hdr_maxsz + \
250				 encode_lockowner_maxsz)
251#define decode_release_lockowner_maxsz \
252				(op_decode_hdr_maxsz)
253#define encode_access_maxsz	(op_encode_hdr_maxsz + 1)
254#define decode_access_maxsz	(op_decode_hdr_maxsz + 2)
255#define encode_symlink_maxsz	(op_encode_hdr_maxsz + \
256				1 + nfs4_name_maxsz + \
257				1 + \
258				nfs4_fattr_maxsz)
259#define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
260#define encode_create_maxsz	(op_encode_hdr_maxsz + \
261				1 + 2 + nfs4_name_maxsz + \
262				encode_attrs_maxsz)
263#define decode_create_maxsz	(op_decode_hdr_maxsz + \
264				decode_change_info_maxsz + \
265				nfs4_fattr_bitmap_maxsz)
266#define encode_statfs_maxsz	(encode_getattr_maxsz)
267#define decode_statfs_maxsz	(decode_getattr_maxsz)
268#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
269#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
270#define encode_getacl_maxsz	(encode_getattr_maxsz)
271#define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
272				 nfs4_fattr_bitmap_maxsz + 1)
273#define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
274				 encode_stateid_maxsz + 3)
275#define decode_setacl_maxsz	(decode_setattr_maxsz)
276#define encode_fs_locations_maxsz \
277				(encode_getattr_maxsz)
278#define decode_fs_locations_maxsz \
279				(0)
280#define encode_secinfo_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
281#define decode_secinfo_maxsz	(op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
282
283#if defined(CONFIG_NFS_V4_1)
284#define NFS4_MAX_MACHINE_NAME_LEN (64)
285#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
286			 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
287
288#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
289				encode_verifier_maxsz + \
290				1 /* co_ownerid.len */ + \
291				XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
292				1 /* flags */ + \
293				1 /* spa_how */ + \
294				/* max is SP4_MACH_CRED (for now) */ + \
295				1 + NFS4_OP_MAP_NUM_WORDS + \
296				1 + NFS4_OP_MAP_NUM_WORDS + \
297				1 /* implementation id array of size 1 */ + \
298				1 /* nii_domain */ + \
299				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
300				1 /* nii_name */ + \
301				XDR_QUADLEN(IMPL_NAME_LIMIT) + \
302				3 /* nii_date */)
303#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
304				2 /* eir_clientid */ + \
305				1 /* eir_sequenceid */ + \
306				1 /* eir_flags */ + \
307				1 /* spr_how */ + \
308				  /* max is SP4_MACH_CRED (for now) */ + \
309				1 + NFS4_OP_MAP_NUM_WORDS + \
310				1 + NFS4_OP_MAP_NUM_WORDS + \
311				2 /* eir_server_owner.so_minor_id */ + \
312				/* eir_server_owner.so_major_id<> */ \
313				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
314				/* eir_server_scope<> */ \
315				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
316				1 /* eir_server_impl_id array length */ + \
317				1 /* nii_domain */ + \
318				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
319				1 /* nii_name */ + \
320				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
321				3 /* nii_date */)
322#define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
323#define decode_channel_attrs_maxsz  (6 + \
324				     1 /* ca_rdma_ird.len */ + \
325				     1 /* ca_rdma_ird */)
326#define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
327				     2 /* csa_clientid */ + \
328				     1 /* csa_sequence */ + \
329				     1 /* csa_flags */ + \
330				     encode_channel_attrs_maxsz + \
331				     encode_channel_attrs_maxsz + \
332				     1 /* csa_cb_program */ + \
333				     1 /* csa_sec_parms.len (1) */ + \
334				     1 /* cb_secflavor (AUTH_SYS) */ + \
335				     1 /* stamp */ + \
336				     1 /* machinename.len */ + \
337				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
338				     1 /* uid */ + \
339				     1 /* gid */ + \
340				     1 /* gids.len (0) */)
341#define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
342				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
343				     1 /* csr_sequence */ + \
344				     1 /* csr_flags */ + \
345				     decode_channel_attrs_maxsz + \
346				     decode_channel_attrs_maxsz)
347#define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
348				     /* bctsa_sessid */ \
349				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350				     1 /* bctsa_dir */ + \
351				     1 /* bctsa_use_conn_in_rdma_mode */)
352#define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +	\
353				     /* bctsr_sessid */ \
354				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
355				     1 /* bctsr_dir */ + \
356				     1 /* bctsr_use_conn_in_rdma_mode */)
357#define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
358#define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
359#define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
360#define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
361#define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
362				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
363#define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
364				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
365#define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
366#define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
367#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
368				XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
369				1 /* layout type */ + \
370				1 /* maxcount */ + \
371				1 /* bitmap size */ + \
372				1 /* notification bitmap length */ + \
373				1 /* notification bitmap, word 0 */)
374#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
375				1 /* layout type */ + \
376				1 /* opaque devaddr4 length */ + \
377				  /* devaddr4 payload is read into page */ \
378				1 /* notification bitmap length */ + \
379				1 /* notification bitmap, word 0 */)
380#define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
381				encode_stateid_maxsz)
382#define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
383				decode_stateid_maxsz + \
384				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
385#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
386				2 /* offset */ + \
387				2 /* length */ + \
388				1 /* reclaim */ + \
389				encode_stateid_maxsz + \
390				1 /* new offset (true) */ + \
391				2 /* last byte written */ + \
392				1 /* nt_timechanged (false) */ + \
393				1 /* layoutupdate4 layout type */ + \
394				1 /* layoutupdate4 opaqueue len */)
395				  /* the actual content of layoutupdate4 should
396				     be allocated by drivers and spliced in
397				     using xdr_write_pages */
398#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
399#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
400				encode_stateid_maxsz + \
401				1 /* FIXME: opaque lrf_body always empty at the moment */)
402#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
403				1 + decode_stateid_maxsz)
404#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
405#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
406#define encode_test_stateid_maxsz	(op_encode_hdr_maxsz + 2 + \
407					 XDR_QUADLEN(NFS4_STATEID_SIZE))
408#define decode_test_stateid_maxsz	(op_decode_hdr_maxsz + 2 + 1)
409#define encode_free_stateid_maxsz	(op_encode_hdr_maxsz + 1 + \
410					 XDR_QUADLEN(NFS4_STATEID_SIZE))
411#define decode_free_stateid_maxsz	(op_decode_hdr_maxsz)
412#else /* CONFIG_NFS_V4_1 */
413#define encode_sequence_maxsz	0
414#define decode_sequence_maxsz	0
415#endif /* CONFIG_NFS_V4_1 */
416
417#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
418#define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
419#define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
420				encode_sequence_maxsz + \
421				encode_putfh_maxsz + \
422				encode_read_maxsz)
423#define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
424				decode_sequence_maxsz + \
425				decode_putfh_maxsz + \
426				decode_read_maxsz)
427#define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
428				encode_sequence_maxsz + \
429				encode_putfh_maxsz + \
430				encode_readlink_maxsz)
431#define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
432				decode_sequence_maxsz + \
433				decode_putfh_maxsz + \
434				decode_readlink_maxsz)
435#define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
436				encode_sequence_maxsz + \
437				encode_putfh_maxsz + \
438				encode_readdir_maxsz)
439#define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
440				decode_sequence_maxsz + \
441				decode_putfh_maxsz + \
442				decode_readdir_maxsz)
443#define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
444				encode_sequence_maxsz + \
445				encode_putfh_maxsz + \
446				encode_write_maxsz + \
447				encode_getattr_maxsz)
448#define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
449				decode_sequence_maxsz + \
450				decode_putfh_maxsz + \
451				decode_write_maxsz + \
452				decode_getattr_maxsz)
453#define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
454				encode_sequence_maxsz + \
455				encode_putfh_maxsz + \
456				encode_commit_maxsz)
457#define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
458				decode_sequence_maxsz + \
459				decode_putfh_maxsz + \
460				decode_commit_maxsz)
461#define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
462				encode_sequence_maxsz + \
463				encode_putfh_maxsz + \
464				encode_open_maxsz + \
465				encode_access_maxsz + \
466				encode_getfh_maxsz + \
467				encode_getattr_maxsz)
468#define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
469				decode_sequence_maxsz + \
470				decode_putfh_maxsz + \
471				decode_open_maxsz + \
472				decode_access_maxsz + \
473				decode_getfh_maxsz + \
474				decode_getattr_maxsz)
475#define NFS4_enc_open_confirm_sz \
476				(compound_encode_hdr_maxsz + \
477				 encode_putfh_maxsz + \
478				 encode_open_confirm_maxsz)
479#define NFS4_dec_open_confirm_sz \
480				(compound_decode_hdr_maxsz + \
481				 decode_putfh_maxsz + \
482				 decode_open_confirm_maxsz)
483#define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
484					encode_sequence_maxsz + \
485					encode_putfh_maxsz + \
486					encode_open_maxsz + \
487					encode_access_maxsz + \
488					encode_getattr_maxsz)
489#define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
490					decode_sequence_maxsz + \
491					decode_putfh_maxsz + \
492					decode_open_maxsz + \
493					decode_access_maxsz + \
494					decode_getattr_maxsz)
495#define NFS4_enc_open_downgrade_sz \
496				(compound_encode_hdr_maxsz + \
497				 encode_sequence_maxsz + \
498				 encode_putfh_maxsz + \
499				 encode_open_downgrade_maxsz + \
500				 encode_getattr_maxsz)
501#define NFS4_dec_open_downgrade_sz \
502				(compound_decode_hdr_maxsz + \
503				 decode_sequence_maxsz + \
504				 decode_putfh_maxsz + \
505				 decode_open_downgrade_maxsz + \
506				 decode_getattr_maxsz)
507#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
508				 encode_sequence_maxsz + \
509				 encode_putfh_maxsz + \
510				 encode_close_maxsz + \
511				 encode_getattr_maxsz)
512#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
513				 decode_sequence_maxsz + \
514				 decode_putfh_maxsz + \
515				 decode_close_maxsz + \
516				 decode_getattr_maxsz)
517#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
518				 encode_sequence_maxsz + \
519				 encode_putfh_maxsz + \
520				 encode_setattr_maxsz + \
521				 encode_getattr_maxsz)
522#define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
523				 decode_sequence_maxsz + \
524				 decode_putfh_maxsz + \
525				 decode_setattr_maxsz + \
526				 decode_getattr_maxsz)
527#define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
528				encode_sequence_maxsz + \
529				encode_putfh_maxsz + \
530				encode_fsinfo_maxsz)
531#define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
532				decode_sequence_maxsz + \
533				decode_putfh_maxsz + \
534				decode_fsinfo_maxsz)
535#define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
536				encode_renew_maxsz)
537#define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
538				decode_renew_maxsz)
539#define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
540				encode_setclientid_maxsz)
541#define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
542				decode_setclientid_maxsz)
543#define NFS4_enc_setclientid_confirm_sz \
544				(compound_encode_hdr_maxsz + \
545				encode_setclientid_confirm_maxsz)
546#define NFS4_dec_setclientid_confirm_sz \
547				(compound_decode_hdr_maxsz + \
548				decode_setclientid_confirm_maxsz)
549#define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
550				encode_sequence_maxsz + \
551				encode_putfh_maxsz + \
552				encode_lock_maxsz)
553#define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
554				decode_sequence_maxsz + \
555				decode_putfh_maxsz + \
556				decode_lock_maxsz)
557#define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
558				encode_sequence_maxsz + \
559				encode_putfh_maxsz + \
560				encode_lockt_maxsz)
561#define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
562				 decode_sequence_maxsz + \
563				 decode_putfh_maxsz + \
564				 decode_lockt_maxsz)
565#define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
566				encode_sequence_maxsz + \
567				encode_putfh_maxsz + \
568				encode_locku_maxsz)
569#define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
570				decode_sequence_maxsz + \
571				decode_putfh_maxsz + \
572				decode_locku_maxsz)
573#define NFS4_enc_release_lockowner_sz \
574				(compound_encode_hdr_maxsz + \
575				 encode_lockowner_maxsz)
576#define NFS4_dec_release_lockowner_sz \
577				(compound_decode_hdr_maxsz + \
578				 decode_lockowner_maxsz)
579#define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
580				encode_sequence_maxsz + \
581				encode_putfh_maxsz + \
582				encode_access_maxsz + \
583				encode_getattr_maxsz)
584#define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
585				decode_sequence_maxsz + \
586				decode_putfh_maxsz + \
587				decode_access_maxsz + \
588				decode_getattr_maxsz)
589#define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
590				encode_sequence_maxsz + \
591				encode_putfh_maxsz + \
592				encode_getattr_maxsz + \
593				encode_renew_maxsz)
594#define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
595				decode_sequence_maxsz + \
596				decode_putfh_maxsz + \
597				decode_getattr_maxsz + \
598				decode_renew_maxsz)
599#define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
600				encode_sequence_maxsz + \
601				encode_putfh_maxsz + \
602				encode_lookup_maxsz + \
603				encode_getattr_maxsz + \
604				encode_getfh_maxsz)
605#define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
606				decode_sequence_maxsz + \
607				decode_putfh_maxsz + \
608				decode_lookup_maxsz + \
609				decode_getattr_maxsz + \
610				decode_getfh_maxsz)
611#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
612				encode_sequence_maxsz + \
613				encode_putrootfh_maxsz + \
614				encode_getattr_maxsz + \
615				encode_getfh_maxsz)
616#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
617				decode_sequence_maxsz + \
618				decode_putrootfh_maxsz + \
619				decode_getattr_maxsz + \
620				decode_getfh_maxsz)
621#define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
622				encode_sequence_maxsz + \
623				encode_putfh_maxsz + \
624				encode_remove_maxsz)
625#define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
626				decode_sequence_maxsz + \
627				decode_putfh_maxsz + \
628				decode_remove_maxsz)
629#define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
630				encode_sequence_maxsz + \
631				encode_putfh_maxsz + \
632				encode_savefh_maxsz + \
633				encode_putfh_maxsz + \
634				encode_rename_maxsz)
635#define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
636				decode_sequence_maxsz + \
637				decode_putfh_maxsz + \
638				decode_savefh_maxsz + \
639				decode_putfh_maxsz + \
640				decode_rename_maxsz)
641#define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
642				encode_sequence_maxsz + \
643				encode_putfh_maxsz + \
644				encode_savefh_maxsz + \
645				encode_putfh_maxsz + \
646				encode_link_maxsz + \
647				encode_restorefh_maxsz + \
648				encode_getattr_maxsz)
649#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
650				decode_sequence_maxsz + \
651				decode_putfh_maxsz + \
652				decode_savefh_maxsz + \
653				decode_putfh_maxsz + \
654				decode_link_maxsz + \
655				decode_restorefh_maxsz + \
656				decode_getattr_maxsz)
657#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
658				encode_sequence_maxsz + \
659				encode_putfh_maxsz + \
660				encode_symlink_maxsz + \
661				encode_getattr_maxsz + \
662				encode_getfh_maxsz)
663#define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
664				decode_sequence_maxsz + \
665				decode_putfh_maxsz + \
666				decode_symlink_maxsz + \
667				decode_getattr_maxsz + \
668				decode_getfh_maxsz)
669#define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
670				encode_sequence_maxsz + \
671				encode_putfh_maxsz + \
672				encode_create_maxsz + \
673				encode_getfh_maxsz + \
674				encode_getattr_maxsz)
675#define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
676				decode_sequence_maxsz + \
677				decode_putfh_maxsz + \
678				decode_create_maxsz + \
679				decode_getfh_maxsz + \
680				decode_getattr_maxsz)
681#define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
682				encode_sequence_maxsz + \
683				encode_putfh_maxsz + \
684				encode_getattr_maxsz)
685#define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
686				decode_sequence_maxsz + \
687				decode_putfh_maxsz + \
688				decode_getattr_maxsz)
689#define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
690				encode_sequence_maxsz + \
691				encode_putfh_maxsz + \
692				encode_statfs_maxsz)
693#define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
694				decode_sequence_maxsz + \
695				decode_putfh_maxsz + \
696				decode_statfs_maxsz)
697#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
698				encode_sequence_maxsz + \
699				encode_putfh_maxsz + \
700				encode_getattr_maxsz)
701#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
702				decode_sequence_maxsz + \
703				decode_putfh_maxsz + \
704				decode_getattr_maxsz)
705#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
706				encode_sequence_maxsz + \
707				encode_putfh_maxsz + \
708				encode_delegreturn_maxsz + \
709				encode_getattr_maxsz)
710#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
711				decode_sequence_maxsz + \
712				decode_delegreturn_maxsz + \
713				decode_getattr_maxsz)
714#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
715				encode_sequence_maxsz + \
716				encode_putfh_maxsz + \
717				encode_getacl_maxsz)
718#define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
719				decode_sequence_maxsz + \
720				decode_putfh_maxsz + \
721				decode_getacl_maxsz)
722#define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
723				encode_sequence_maxsz + \
724				encode_putfh_maxsz + \
725				encode_setacl_maxsz)
726#define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
727				decode_sequence_maxsz + \
728				decode_putfh_maxsz + \
729				decode_setacl_maxsz)
730#define NFS4_enc_fs_locations_sz \
731				(compound_encode_hdr_maxsz + \
732				 encode_sequence_maxsz + \
733				 encode_putfh_maxsz + \
734				 encode_lookup_maxsz + \
735				 encode_fs_locations_maxsz + \
736				 encode_renew_maxsz)
737#define NFS4_dec_fs_locations_sz \
738				(compound_decode_hdr_maxsz + \
739				 decode_sequence_maxsz + \
740				 decode_putfh_maxsz + \
741				 decode_lookup_maxsz + \
742				 decode_fs_locations_maxsz + \
743				 decode_renew_maxsz)
744#define NFS4_enc_secinfo_sz 	(compound_encode_hdr_maxsz + \
745				encode_sequence_maxsz + \
746				encode_putfh_maxsz + \
747				encode_secinfo_maxsz)
748#define NFS4_dec_secinfo_sz	(compound_decode_hdr_maxsz + \
749				decode_sequence_maxsz + \
750				decode_putfh_maxsz + \
751				decode_secinfo_maxsz)
752#define NFS4_enc_fsid_present_sz \
753				(compound_encode_hdr_maxsz + \
754				 encode_sequence_maxsz + \
755				 encode_putfh_maxsz + \
756				 encode_getfh_maxsz + \
757				 encode_renew_maxsz)
758#define NFS4_dec_fsid_present_sz \
759				(compound_decode_hdr_maxsz + \
760				 decode_sequence_maxsz + \
761				 decode_putfh_maxsz + \
762				 decode_getfh_maxsz + \
763				 decode_renew_maxsz)
764#if defined(CONFIG_NFS_V4_1)
765#define NFS4_enc_bind_conn_to_session_sz \
766				(compound_encode_hdr_maxsz + \
767				 encode_bind_conn_to_session_maxsz)
768#define NFS4_dec_bind_conn_to_session_sz \
769				(compound_decode_hdr_maxsz + \
770				 decode_bind_conn_to_session_maxsz)
771#define NFS4_enc_exchange_id_sz \
772				(compound_encode_hdr_maxsz + \
773				 encode_exchange_id_maxsz)
774#define NFS4_dec_exchange_id_sz \
775				(compound_decode_hdr_maxsz + \
776				 decode_exchange_id_maxsz)
777#define NFS4_enc_create_session_sz \
778				(compound_encode_hdr_maxsz + \
779				 encode_create_session_maxsz)
780#define NFS4_dec_create_session_sz \
781				(compound_decode_hdr_maxsz + \
782				 decode_create_session_maxsz)
783#define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
784					 encode_destroy_session_maxsz)
785#define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
786					 decode_destroy_session_maxsz)
787#define NFS4_enc_destroy_clientid_sz	(compound_encode_hdr_maxsz + \
788					 encode_destroy_clientid_maxsz)
789#define NFS4_dec_destroy_clientid_sz	(compound_decode_hdr_maxsz + \
790					 decode_destroy_clientid_maxsz)
791#define NFS4_enc_sequence_sz \
792				(compound_decode_hdr_maxsz + \
793				 encode_sequence_maxsz)
794#define NFS4_dec_sequence_sz \
795				(compound_decode_hdr_maxsz + \
796				 decode_sequence_maxsz)
797#define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
798					 encode_sequence_maxsz + \
799					 encode_putrootfh_maxsz + \
800					 encode_fsinfo_maxsz)
801#define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
802					 decode_sequence_maxsz + \
803					 decode_putrootfh_maxsz + \
804					 decode_fsinfo_maxsz)
805#define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
806					 encode_sequence_maxsz + \
807					 encode_reclaim_complete_maxsz)
808#define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
809					 decode_sequence_maxsz + \
810					 decode_reclaim_complete_maxsz)
811#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
812				encode_sequence_maxsz +\
813				encode_getdeviceinfo_maxsz)
814#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
815				decode_sequence_maxsz + \
816				decode_getdeviceinfo_maxsz)
817#define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
818				encode_sequence_maxsz + \
819				encode_putfh_maxsz +        \
820				encode_layoutget_maxsz)
821#define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
822				decode_sequence_maxsz + \
823				decode_putfh_maxsz +        \
824				decode_layoutget_maxsz)
825#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
826				encode_sequence_maxsz +\
827				encode_putfh_maxsz + \
828				encode_layoutcommit_maxsz + \
829				encode_getattr_maxsz)
830#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
831				decode_sequence_maxsz + \
832				decode_putfh_maxsz + \
833				decode_layoutcommit_maxsz + \
834				decode_getattr_maxsz)
835#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
836				encode_sequence_maxsz + \
837				encode_putfh_maxsz + \
838				encode_layoutreturn_maxsz)
839#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
840				decode_sequence_maxsz + \
841				decode_putfh_maxsz + \
842				decode_layoutreturn_maxsz)
843#define NFS4_enc_secinfo_no_name_sz	(compound_encode_hdr_maxsz + \
844					encode_sequence_maxsz + \
845					encode_putrootfh_maxsz +\
846					encode_secinfo_no_name_maxsz)
847#define NFS4_dec_secinfo_no_name_sz	(compound_decode_hdr_maxsz + \
848					decode_sequence_maxsz + \
849					decode_putrootfh_maxsz + \
850					decode_secinfo_no_name_maxsz)
851#define NFS4_enc_test_stateid_sz	(compound_encode_hdr_maxsz + \
852					 encode_sequence_maxsz + \
853					 encode_test_stateid_maxsz)
854#define NFS4_dec_test_stateid_sz	(compound_decode_hdr_maxsz + \
855					 decode_sequence_maxsz + \
856					 decode_test_stateid_maxsz)
857#define NFS4_enc_free_stateid_sz	(compound_encode_hdr_maxsz + \
858					 encode_sequence_maxsz + \
859					 encode_free_stateid_maxsz)
860#define NFS4_dec_free_stateid_sz	(compound_decode_hdr_maxsz + \
861					 decode_sequence_maxsz + \
862					 decode_free_stateid_maxsz)
863
864const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
865				      compound_encode_hdr_maxsz +
866				      encode_sequence_maxsz +
867				      encode_putfh_maxsz +
868				      encode_getattr_maxsz) *
869				     XDR_UNIT);
870
871const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
872				     compound_decode_hdr_maxsz +
873				     decode_sequence_maxsz +
874				     decode_putfh_maxsz) *
875				    XDR_UNIT);
876
877const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
878					   compound_decode_hdr_maxsz +
879					   decode_sequence_maxsz) *
880					  XDR_UNIT);
881EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
882#endif /* CONFIG_NFS_V4_1 */
883
884static const umode_t nfs_type2fmt[] = {
885	[NF4BAD] = 0,
886	[NF4REG] = S_IFREG,
887	[NF4DIR] = S_IFDIR,
888	[NF4BLK] = S_IFBLK,
889	[NF4CHR] = S_IFCHR,
890	[NF4LNK] = S_IFLNK,
891	[NF4SOCK] = S_IFSOCK,
892	[NF4FIFO] = S_IFIFO,
893	[NF4ATTRDIR] = 0,
894	[NF4NAMEDATTR] = 0,
895};
896
897struct compound_hdr {
898	int32_t		status;
899	uint32_t	nops;
900	__be32 *	nops_p;
901	uint32_t	taglen;
902	char *		tag;
903	uint32_t	replen;		/* expected reply words */
904	u32		minorversion;
905};
906
907static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
908{
909	__be32 *p = xdr_reserve_space(xdr, nbytes);
910	BUG_ON(!p);
911	return p;
912}
913
914static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
915{
916	__be32 *p;
917
918	p = xdr_reserve_space(xdr, len);
919	xdr_encode_opaque_fixed(p, buf, len);
920}
921
922static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
923{
924	__be32 *p;
925
926	p = reserve_space(xdr, 4 + len);
927	xdr_encode_opaque(p, str, len);
928}
929
930static void encode_uint32(struct xdr_stream *xdr, u32 n)
931{
932	__be32 *p;
933
934	p = reserve_space(xdr, 4);
935	*p = cpu_to_be32(n);
936}
937
938static void encode_uint64(struct xdr_stream *xdr, u64 n)
939{
940	__be32 *p;
941
942	p = reserve_space(xdr, 8);
943	xdr_encode_hyper(p, n);
944}
945
946static void encode_nfs4_seqid(struct xdr_stream *xdr,
947		const struct nfs_seqid *seqid)
948{
949	if (seqid != NULL)
950		encode_uint32(xdr, seqid->sequence->counter);
951	else
952		encode_uint32(xdr, 0);
953}
954
955static void encode_compound_hdr(struct xdr_stream *xdr,
956				struct rpc_rqst *req,
957				struct compound_hdr *hdr)
958{
959	__be32 *p;
960	struct rpc_auth *auth = req->rq_cred->cr_auth;
961
962	/* initialize running count of expected bytes in reply.
963	 * NOTE: the replied tag SHOULD be the same is the one sent,
964	 * but this is not required as a MUST for the server to do so. */
965	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
966
967	WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
968	encode_string(xdr, hdr->taglen, hdr->tag);
969	p = reserve_space(xdr, 8);
970	*p++ = cpu_to_be32(hdr->minorversion);
971	hdr->nops_p = p;
972	*p = cpu_to_be32(hdr->nops);
973}
974
975static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
976		uint32_t replen,
977		struct compound_hdr *hdr)
978{
979	encode_uint32(xdr, op);
980	hdr->nops++;
981	hdr->replen += replen;
982}
983
984static void encode_nops(struct compound_hdr *hdr)
985{
986	WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
987	*hdr->nops_p = htonl(hdr->nops);
988}
989
990static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
991{
992	encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
993}
994
995static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
996{
997	encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
998}
999
1000static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1001				const struct nfs4_label *label,
1002				const struct nfs_server *server)
1003{
1004	char owner_name[IDMAP_NAMESZ];
1005	char owner_group[IDMAP_NAMESZ];
1006	int owner_namelen = 0;
1007	int owner_grouplen = 0;
1008	__be32 *p;
1009	unsigned i;
1010	uint32_t len = 0;
1011	uint32_t bmval_len;
1012	uint32_t bmval[3] = { 0 };
1013
1014	/*
1015	 * We reserve enough space to write the entire attribute buffer at once.
1016	 * In the worst-case, this would be
1017	 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1018	 * = 40 bytes, plus any contribution from variable-length fields
1019	 *            such as owner/group.
1020	 */
1021	if (iap->ia_valid & ATTR_SIZE) {
1022		bmval[0] |= FATTR4_WORD0_SIZE;
1023		len += 8;
1024	}
1025	if (iap->ia_valid & ATTR_MODE) {
1026		bmval[1] |= FATTR4_WORD1_MODE;
1027		len += 4;
1028	}
1029	if (iap->ia_valid & ATTR_UID) {
1030		owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1031		if (owner_namelen < 0) {
1032			dprintk("nfs: couldn't resolve uid %d to string\n",
1033					from_kuid(&init_user_ns, iap->ia_uid));
1034			/* XXX */
1035			strcpy(owner_name, "nobody");
1036			owner_namelen = sizeof("nobody") - 1;
1037			/* goto out; */
1038		}
1039		bmval[1] |= FATTR4_WORD1_OWNER;
1040		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1041	}
1042	if (iap->ia_valid & ATTR_GID) {
1043		owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1044		if (owner_grouplen < 0) {
1045			dprintk("nfs: couldn't resolve gid %d to string\n",
1046					from_kgid(&init_user_ns, iap->ia_gid));
1047			strcpy(owner_group, "nobody");
1048			owner_grouplen = sizeof("nobody") - 1;
1049			/* goto out; */
1050		}
1051		bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1052		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1053	}
1054	if (iap->ia_valid & ATTR_ATIME_SET) {
1055		bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1056		len += 16;
1057	} else if (iap->ia_valid & ATTR_ATIME) {
1058		bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1059		len += 4;
1060	}
1061	if (iap->ia_valid & ATTR_MTIME_SET) {
1062		bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1063		len += 16;
1064	} else if (iap->ia_valid & ATTR_MTIME) {
1065		bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1066		len += 4;
1067	}
1068	if (label) {
1069		len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1070		bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1071	}
1072
1073	if (bmval[2] != 0)
1074		bmval_len = 3;
1075	else if (bmval[1] != 0)
1076		bmval_len = 2;
1077	else
1078		bmval_len = 1;
1079
1080	p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1081
1082	*p++ = cpu_to_be32(bmval_len);
1083	for (i = 0; i < bmval_len; i++)
1084		*p++ = cpu_to_be32(bmval[i]);
1085	*p++ = cpu_to_be32(len);
1086
1087	if (bmval[0] & FATTR4_WORD0_SIZE)
1088		p = xdr_encode_hyper(p, iap->ia_size);
1089	if (bmval[1] & FATTR4_WORD1_MODE)
1090		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1091	if (bmval[1] & FATTR4_WORD1_OWNER)
1092		p = xdr_encode_opaque(p, owner_name, owner_namelen);
1093	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1094		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1095	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1096		if (iap->ia_valid & ATTR_ATIME_SET) {
1097			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1098			p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1099			*p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1100		} else
1101			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1102	}
1103	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1104		if (iap->ia_valid & ATTR_MTIME_SET) {
1105			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1106			p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1107			*p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1108		} else
1109			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1110	}
1111	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1112		*p++ = cpu_to_be32(label->lfs);
1113		*p++ = cpu_to_be32(label->pi);
1114		*p++ = cpu_to_be32(label->len);
1115		p = xdr_encode_opaque_fixed(p, label->label, label->len);
1116	}
1117
1118/* out: */
1119}
1120
1121static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1122{
1123	encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1124	encode_uint32(xdr, access);
1125}
1126
1127static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1128{
1129	encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1130	encode_nfs4_seqid(xdr, arg->seqid);
1131	encode_nfs4_stateid(xdr, &arg->stateid);
1132}
1133
1134static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1135{
1136	__be32 *p;
1137
1138	encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1139	p = reserve_space(xdr, 12);
1140	p = xdr_encode_hyper(p, args->offset);
1141	*p = cpu_to_be32(args->count);
1142}
1143
1144static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1145{
1146	__be32 *p;
1147
1148	encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1149	encode_uint32(xdr, create->ftype);
1150
1151	switch (create->ftype) {
1152	case NF4LNK:
1153		p = reserve_space(xdr, 4);
1154		*p = cpu_to_be32(create->u.symlink.len);
1155		xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1156		break;
1157
1158	case NF4BLK: case NF4CHR:
1159		p = reserve_space(xdr, 8);
1160		*p++ = cpu_to_be32(create->u.device.specdata1);
1161		*p = cpu_to_be32(create->u.device.specdata2);
1162		break;
1163
1164	default:
1165		break;
1166	}
1167
1168	encode_string(xdr, create->name->len, create->name->name);
1169	encode_attrs(xdr, create->attrs, create->label, create->server);
1170}
1171
1172static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1173{
1174	__be32 *p;
1175
1176	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177	p = reserve_space(xdr, 8);
1178	*p++ = cpu_to_be32(1);
1179	*p = cpu_to_be32(bitmap);
1180}
1181
1182static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1183{
1184	__be32 *p;
1185
1186	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1187	p = reserve_space(xdr, 12);
1188	*p++ = cpu_to_be32(2);
1189	*p++ = cpu_to_be32(bm0);
1190	*p = cpu_to_be32(bm1);
1191}
1192
1193static void
1194encode_getattr_three(struct xdr_stream *xdr,
1195		     uint32_t bm0, uint32_t bm1, uint32_t bm2,
1196		     struct compound_hdr *hdr)
1197{
1198	__be32 *p;
1199
1200	encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1201	if (bm2) {
1202		p = reserve_space(xdr, 16);
1203		*p++ = cpu_to_be32(3);
1204		*p++ = cpu_to_be32(bm0);
1205		*p++ = cpu_to_be32(bm1);
1206		*p = cpu_to_be32(bm2);
1207	} else if (bm1) {
1208		p = reserve_space(xdr, 12);
1209		*p++ = cpu_to_be32(2);
1210		*p++ = cpu_to_be32(bm0);
1211		*p = cpu_to_be32(bm1);
1212	} else {
1213		p = reserve_space(xdr, 8);
1214		*p++ = cpu_to_be32(1);
1215		*p = cpu_to_be32(bm0);
1216	}
1217}
1218
1219static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1220{
1221	encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1222			   bitmask[1] & nfs4_fattr_bitmap[1],
1223			   bitmask[2] & nfs4_fattr_bitmap[2],
1224			   hdr);
1225}
1226
1227static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1228				 const u32 *open_bitmap,
1229				 struct compound_hdr *hdr)
1230{
1231	encode_getattr_three(xdr,
1232			     bitmask[0] & open_bitmap[0],
1233			     bitmask[1] & open_bitmap[1],
1234			     bitmask[2] & open_bitmap[2],
1235			     hdr);
1236}
1237
1238static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1239{
1240	encode_getattr_three(xdr,
1241			     bitmask[0] & nfs4_fsinfo_bitmap[0],
1242			     bitmask[1] & nfs4_fsinfo_bitmap[1],
1243			     bitmask[2] & nfs4_fsinfo_bitmap[2],
1244			     hdr);
1245}
1246
1247static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1248{
1249	encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1250			   bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1251}
1252
1253static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1254{
1255	encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1256}
1257
1258static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1259{
1260	encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1261	encode_string(xdr, name->len, name->name);
1262}
1263
1264static inline int nfs4_lock_type(struct file_lock *fl, int block)
1265{
1266	if (fl->fl_type == F_RDLCK)
1267		return block ? NFS4_READW_LT : NFS4_READ_LT;
1268	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1269}
1270
1271static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1272{
1273	if (fl->fl_end == OFFSET_MAX)
1274		return ~(uint64_t)0;
1275	return fl->fl_end - fl->fl_start + 1;
1276}
1277
1278static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1279{
1280	__be32 *p;
1281
1282	p = reserve_space(xdr, 32);
1283	p = xdr_encode_hyper(p, lowner->clientid);
1284	*p++ = cpu_to_be32(20);
1285	p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1286	*p++ = cpu_to_be32(lowner->s_dev);
1287	xdr_encode_hyper(p, lowner->id);
1288}
1289
1290/*
1291 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1292 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1293 */
1294static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1295{
1296	__be32 *p;
1297
1298	encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1299	p = reserve_space(xdr, 28);
1300	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1301	*p++ = cpu_to_be32(args->reclaim);
1302	p = xdr_encode_hyper(p, args->fl->fl_start);
1303	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1304	*p = cpu_to_be32(args->new_lock_owner);
1305	if (args->new_lock_owner){
1306		encode_nfs4_seqid(xdr, args->open_seqid);
1307		encode_nfs4_stateid(xdr, &args->open_stateid);
1308		encode_nfs4_seqid(xdr, args->lock_seqid);
1309		encode_lockowner(xdr, &args->lock_owner);
1310	}
1311	else {
1312		encode_nfs4_stateid(xdr, &args->lock_stateid);
1313		encode_nfs4_seqid(xdr, args->lock_seqid);
1314	}
1315}
1316
1317static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1318{
1319	__be32 *p;
1320
1321	encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1322	p = reserve_space(xdr, 20);
1323	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1324	p = xdr_encode_hyper(p, args->fl->fl_start);
1325	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1326	encode_lockowner(xdr, &args->lock_owner);
1327}
1328
1329static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1330{
1331	__be32 *p;
1332
1333	encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1334	encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1335	encode_nfs4_seqid(xdr, args->seqid);
1336	encode_nfs4_stateid(xdr, &args->stateid);
1337	p = reserve_space(xdr, 16);
1338	p = xdr_encode_hyper(p, args->fl->fl_start);
1339	xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1340}
1341
1342static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1343{
1344	encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1345	encode_lockowner(xdr, lowner);
1346}
1347
1348static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1349{
1350	encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1351	encode_string(xdr, name->len, name->name);
1352}
1353
1354static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1355{
1356	__be32 *p;
1357
1358	p = reserve_space(xdr, 8);
1359	*p++ = cpu_to_be32(share_access);
1360	*p = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
1361}
1362
1363static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1364{
1365	__be32 *p;
1366 /*
1367 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1368 * owner 4 = 32
1369 */
1370	encode_nfs4_seqid(xdr, arg->seqid);
1371	encode_share_access(xdr, arg->share_access);
1372	p = reserve_space(xdr, 36);
1373	p = xdr_encode_hyper(p, arg->clientid);
1374	*p++ = cpu_to_be32(24);
1375	p = xdr_encode_opaque_fixed(p, "open id:", 8);
1376	*p++ = cpu_to_be32(arg->server->s_dev);
1377	*p++ = cpu_to_be32(arg->id.uniquifier);
1378	xdr_encode_hyper(p, arg->id.create_time);
1379}
1380
1381static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1382{
1383	struct iattr dummy;
1384	__be32 *p;
1385
1386	p = reserve_space(xdr, 4);
1387	switch(arg->createmode) {
1388	case NFS4_CREATE_UNCHECKED:
1389		*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1390		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1391		break;
1392	case NFS4_CREATE_GUARDED:
1393		*p = cpu_to_be32(NFS4_CREATE_GUARDED);
1394		encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1395		break;
1396	case NFS4_CREATE_EXCLUSIVE:
1397		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1398		encode_nfs4_verifier(xdr, &arg->u.verifier);
1399		break;
1400	case NFS4_CREATE_EXCLUSIVE4_1:
1401		*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1402		encode_nfs4_verifier(xdr, &arg->u.verifier);
1403		dummy.ia_valid = 0;
1404		encode_attrs(xdr, &dummy, arg->label, arg->server);
1405	}
1406}
1407
1408static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1409{
1410	__be32 *p;
1411
1412	p = reserve_space(xdr, 4);
1413	switch (arg->open_flags & O_CREAT) {
1414	case 0:
1415		*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1416		break;
1417	default:
1418		*p = cpu_to_be32(NFS4_OPEN_CREATE);
1419		encode_createmode(xdr, arg);
1420	}
1421}
1422
1423static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1424{
1425	__be32 *p;
1426
1427	p = reserve_space(xdr, 4);
1428	switch (delegation_type) {
1429	case 0:
1430		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1431		break;
1432	case FMODE_READ:
1433		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1434		break;
1435	case FMODE_WRITE|FMODE_READ:
1436		*p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1437		break;
1438	default:
1439		BUG();
1440	}
1441}
1442
1443static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1444{
1445	__be32 *p;
1446
1447	p = reserve_space(xdr, 4);
1448	*p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1449	encode_string(xdr, name->len, name->name);
1450}
1451
1452static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1453{
1454	__be32 *p;
1455
1456	p = reserve_space(xdr, 4);
1457	*p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1458	encode_delegation_type(xdr, type);
1459}
1460
1461static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1462{
1463	__be32 *p;
1464
1465	p = reserve_space(xdr, 4);
1466	*p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1467	encode_nfs4_stateid(xdr, stateid);
1468	encode_string(xdr, name->len, name->name);
1469}
1470
1471static inline void encode_claim_fh(struct xdr_stream *xdr)
1472{
1473	__be32 *p;
1474
1475	p = reserve_space(xdr, 4);
1476	*p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1477}
1478
1479static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1480{
1481	__be32 *p;
1482
1483	p = reserve_space(xdr, 4);
1484	*p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1485	encode_nfs4_stateid(xdr, stateid);
1486}
1487
1488static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1489{
1490	encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1491	encode_openhdr(xdr, arg);
1492	encode_opentype(xdr, arg);
1493	switch (arg->claim) {
1494	case NFS4_OPEN_CLAIM_NULL:
1495		encode_claim_null(xdr, arg->name);
1496		break;
1497	case NFS4_OPEN_CLAIM_PREVIOUS:
1498		encode_claim_previous(xdr, arg->u.delegation_type);
1499		break;
1500	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1501		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1502		break;
1503	case NFS4_OPEN_CLAIM_FH:
1504		encode_claim_fh(xdr);
1505		break;
1506	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1507		encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1508		break;
1509	default:
1510		BUG();
1511	}
1512}
1513
1514static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1515{
1516	encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1517	encode_nfs4_stateid(xdr, arg->stateid);
1518	encode_nfs4_seqid(xdr, arg->seqid);
1519}
1520
1521static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1522{
1523	encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1524	encode_nfs4_stateid(xdr, &arg->stateid);
1525	encode_nfs4_seqid(xdr, arg->seqid);
1526	encode_share_access(xdr, arg->share_access);
1527}
1528
1529static void
1530encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1531{
1532	encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1533	encode_string(xdr, fh->size, fh->data);
1534}
1535
1536static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1537{
1538	encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1539}
1540
1541static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1542			struct compound_hdr *hdr)
1543{
1544	__be32 *p;
1545
1546	encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1547	encode_nfs4_stateid(xdr, &args->stateid);
1548
1549	p = reserve_space(xdr, 12);
1550	p = xdr_encode_hyper(p, args->offset);
1551	*p = cpu_to_be32(args->count);
1552}
1553
1554static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1555{
1556	uint32_t attrs[3] = {
1557		FATTR4_WORD0_RDATTR_ERROR,
1558		FATTR4_WORD1_MOUNTED_ON_FILEID,
1559	};
1560	uint32_t dircount = readdir->count >> 1;
1561	__be32 *p, verf[2];
1562	uint32_t attrlen = 0;
1563	unsigned int i;
1564
1565	if (readdir->plus) {
1566		attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1567			FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1568		attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1569			FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1570			FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1571			FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1572		attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1573		dircount >>= 1;
1574	}
1575	/* Use mounted_on_fileid only if the server supports it */
1576	if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1577		attrs[0] |= FATTR4_WORD0_FILEID;
1578	for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1579		attrs[i] &= readdir->bitmask[i];
1580		if (attrs[i] != 0)
1581			attrlen = i+1;
1582	}
1583
1584	encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1585	encode_uint64(xdr, readdir->cookie);
1586	encode_nfs4_verifier(xdr, &readdir->verifier);
1587	p = reserve_space(xdr, 12 + (attrlen << 2));
1588	*p++ = cpu_to_be32(dircount);
1589	*p++ = cpu_to_be32(readdir->count);
1590	*p++ = cpu_to_be32(attrlen);
1591	for (i = 0; i < attrlen; i++)
1592		*p++ = cpu_to_be32(attrs[i]);
1593	memcpy(verf, readdir->verifier.data, sizeof(verf));
1594
1595	dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1596			__func__,
1597			(unsigned long long)readdir->cookie,
1598			verf[0], verf[1],
1599			attrs[0] & readdir->bitmask[0],
1600			attrs[1] & readdir->bitmask[1],
1601			attrs[2] & readdir->bitmask[2]);
1602}
1603
1604static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1605{
1606	encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1607}
1608
1609static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1610{
1611	encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1612	encode_string(xdr, name->len, name->name);
1613}
1614
1615static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1616{
1617	encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1618	encode_string(xdr, oldname->len, oldname->name);
1619	encode_string(xdr, newname->len, newname->name);
1620}
1621
1622static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1623			 struct compound_hdr *hdr)
1624{
1625	encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1626	encode_uint64(xdr, clid);
1627}
1628
1629static void
1630encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1631{
1632	encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1633}
1634
1635static void
1636encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1637{
1638	__be32 *p;
1639
1640	encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1641	encode_nfs4_stateid(xdr, &zero_stateid);
1642	p = reserve_space(xdr, 2*4);
1643	*p++ = cpu_to_be32(1);
1644	*p = cpu_to_be32(FATTR4_WORD0_ACL);
1645	p = reserve_space(xdr, 4);
1646	*p = cpu_to_be32(arg->acl_len);
1647	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1648}
1649
1650static void
1651encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652{
1653	encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1654}
1655
1656static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1657{
1658	encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1659	encode_nfs4_stateid(xdr, &arg->stateid);
1660	encode_attrs(xdr, arg->iap, arg->label, server);
1661}
1662
1663static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1664{
1665	__be32 *p;
1666
1667	encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1668	encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1669
1670	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1671	p = reserve_space(xdr, 4);
1672	*p = cpu_to_be32(setclientid->sc_prog);
1673	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1674	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1675	p = reserve_space(xdr, 4);
1676	*p = cpu_to_be32(setclientid->sc_cb_ident);
1677}
1678
1679static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1680{
1681	encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1682			decode_setclientid_confirm_maxsz, hdr);
1683	encode_uint64(xdr, arg->clientid);
1684	encode_nfs4_verifier(xdr, &arg->confirm);
1685}
1686
1687static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1688			 struct compound_hdr *hdr)
1689{
1690	__be32 *p;
1691
1692	encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1693	encode_nfs4_stateid(xdr, &args->stateid);
1694
1695	p = reserve_space(xdr, 16);
1696	p = xdr_encode_hyper(p, args->offset);
1697	*p++ = cpu_to_be32(args->stable);
1698	*p = cpu_to_be32(args->count);
1699
1700	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1701}
1702
1703static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1704{
1705	encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1706	encode_nfs4_stateid(xdr, stateid);
1707}
1708
1709static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1710{
1711	encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1712	encode_string(xdr, name->len, name->name);
1713}
1714
1715#if defined(CONFIG_NFS_V4_1)
1716/* NFSv4.1 operations */
1717static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1718				   struct nfs41_bind_conn_to_session_args *args,
1719				   struct compound_hdr *hdr)
1720{
1721	__be32 *p;
1722
1723	encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1724		decode_bind_conn_to_session_maxsz, hdr);
1725	encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1726	p = xdr_reserve_space(xdr, 8);
1727	*p++ = cpu_to_be32(args->dir);
1728	*p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1729}
1730
1731static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1732{
1733	unsigned int i;
1734	encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1735	for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1736		encode_uint32(xdr, op_map->u.words[i]);
1737}
1738
1739static void encode_exchange_id(struct xdr_stream *xdr,
1740			       struct nfs41_exchange_id_args *args,
1741			       struct compound_hdr *hdr)
1742{
1743	__be32 *p;
1744	char impl_name[IMPL_NAME_LIMIT];
1745	int len = 0;
1746
1747	encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1748	encode_nfs4_verifier(xdr, args->verifier);
1749
1750	encode_string(xdr, args->id_len, args->id);
1751
1752	encode_uint32(xdr, args->flags);
1753	encode_uint32(xdr, args->state_protect.how);
1754
1755	switch (args->state_protect.how) {
1756	case SP4_NONE:
1757		break;
1758	case SP4_MACH_CRED:
1759		encode_op_map(xdr, &args->state_protect.enforce);
1760		encode_op_map(xdr, &args->state_protect.allow);
1761		break;
1762	default:
1763		WARN_ON_ONCE(1);
1764		break;
1765	}
1766
1767	if (send_implementation_id &&
1768	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1769	    sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1770		<= sizeof(impl_name) + 1)
1771		len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1772			       utsname()->sysname, utsname()->release,
1773			       utsname()->version, utsname()->machine);
1774
1775	if (len > 0) {
1776		encode_uint32(xdr, 1);	/* implementation id array length=1 */
1777
1778		encode_string(xdr,
1779			sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1780			CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1781		encode_string(xdr, len, impl_name);
1782		/* just send zeros for nii_date - the date is in nii_name */
1783		p = reserve_space(xdr, 12);
1784		p = xdr_encode_hyper(p, 0);
1785		*p = cpu_to_be32(0);
1786	} else
1787		encode_uint32(xdr, 0);	/* implementation id array length=0 */
1788}
1789
1790static void encode_create_session(struct xdr_stream *xdr,
1791				  struct nfs41_create_session_args *args,
1792				  struct compound_hdr *hdr)
1793{
1794	__be32 *p;
1795	struct nfs_client *clp = args->client;
1796	struct rpc_clnt *clnt = clp->cl_rpcclient;
1797	struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1798	u32 max_resp_sz_cached;
1799
1800	/*
1801	 * Assumes OPEN is the biggest non-idempotent compound.
1802	 * 2 is the verifier.
1803	 */
1804	max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1805			      RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1806
1807	encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1808	p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1809	p = xdr_encode_hyper(p, args->clientid);
1810	*p++ = cpu_to_be32(args->seqid);			/*Sequence id */
1811	*p++ = cpu_to_be32(args->flags);			/*flags */
1812
1813	/* Fore Channel */
1814	*p++ = cpu_to_be32(0);				/* header padding size */
1815	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
1816	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz);	/* max resp size */
1817	*p++ = cpu_to_be32(max_resp_sz_cached);		/* Max resp sz cached */
1818	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
1819	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
1820	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
1821
1822	/* Back Channel */
1823	*p++ = cpu_to_be32(0);				/* header padding size */
1824	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
1825	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
1826	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
1827	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
1828	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
1829	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */
1830
1831	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
1832	*p++ = cpu_to_be32(1);
1833	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */
1834
1835	/* authsys_parms rfc1831 */
1836	*p++ = cpu_to_be32(nn->boot_time.tv_nsec);	/* stamp */
1837	p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1838	*p++ = cpu_to_be32(0);				/* UID */
1839	*p++ = cpu_to_be32(0);				/* GID */
1840	*p = cpu_to_be32(0);				/* No more gids */
1841}
1842
1843static void encode_destroy_session(struct xdr_stream *xdr,
1844				   struct nfs4_session *session,
1845				   struct compound_hdr *hdr)
1846{
1847	encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1848	encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1849}
1850
1851static void encode_destroy_clientid(struct xdr_stream *xdr,
1852				   uint64_t clientid,
1853				   struct compound_hdr *hdr)
1854{
1855	encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1856	encode_uint64(xdr, clientid);
1857}
1858
1859static void encode_reclaim_complete(struct xdr_stream *xdr,
1860				    struct nfs41_reclaim_complete_args *args,
1861				    struct compound_hdr *hdr)
1862{
1863	encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1864	encode_uint32(xdr, args->one_fs);
1865}
1866#endif /* CONFIG_NFS_V4_1 */
1867
1868static void encode_sequence(struct xdr_stream *xdr,
1869			    const struct nfs4_sequence_args *args,
1870			    struct compound_hdr *hdr)
1871{
1872#if defined(CONFIG_NFS_V4_1)
1873	struct nfs4_session *session;
1874	struct nfs4_slot_table *tp;
1875	struct nfs4_slot *slot = args->sa_slot;
1876	__be32 *p;
1877
1878	tp = slot->table;
1879	session = tp->session;
1880	if (!session)
1881		return;
1882
1883	encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1884
1885	/*
1886	 * Sessionid + seqid + slotid + max slotid + cache_this
1887	 */
1888	dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1889		"max_slotid=%d cache_this=%d\n",
1890		__func__,
1891		((u32 *)session->sess_id.data)[0],
1892		((u32 *)session->sess_id.data)[1],
1893		((u32 *)session->sess_id.data)[2],
1894		((u32 *)session->sess_id.data)[3],
1895		slot->seq_nr, slot->slot_nr,
1896		tp->highest_used_slotid, args->sa_cache_this);
1897	p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1898	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1899	*p++ = cpu_to_be32(slot->seq_nr);
1900	*p++ = cpu_to_be32(slot->slot_nr);
1901	*p++ = cpu_to_be32(tp->highest_used_slotid);
1902	*p = cpu_to_be32(args->sa_cache_this);
1903#endif /* CONFIG_NFS_V4_1 */
1904}
1905
1906#ifdef CONFIG_NFS_V4_1
1907static void
1908encode_getdeviceinfo(struct xdr_stream *xdr,
1909		     const struct nfs4_getdeviceinfo_args *args,
1910		     struct compound_hdr *hdr)
1911{
1912	__be32 *p;
1913
1914	encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1915	p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1916	p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1917				    NFS4_DEVICEID4_SIZE);
1918	*p++ = cpu_to_be32(args->pdev->layout_type);
1919	*p++ = cpu_to_be32(args->pdev->maxcount);	/* gdia_maxcount */
1920
1921	p = reserve_space(xdr, 4 + 4);
1922	*p++ = cpu_to_be32(1);			/* bitmap length */
1923	*p++ = cpu_to_be32(args->notify_types);
1924}
1925
1926static void
1927encode_layoutget(struct xdr_stream *xdr,
1928		      const struct nfs4_layoutget_args *args,
1929		      struct compound_hdr *hdr)
1930{
1931	__be32 *p;
1932
1933	encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1934	p = reserve_space(xdr, 36);
1935	*p++ = cpu_to_be32(0);     /* Signal layout available */
1936	*p++ = cpu_to_be32(args->type);
1937	*p++ = cpu_to_be32(args->range.iomode);
1938	p = xdr_encode_hyper(p, args->range.offset);
1939	p = xdr_encode_hyper(p, args->range.length);
1940	p = xdr_encode_hyper(p, args->minlength);
1941	encode_nfs4_stateid(xdr, &args->stateid);
1942	encode_uint32(xdr, args->maxcount);
1943
1944	dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1945		__func__,
1946		args->type,
1947		args->range.iomode,
1948		(unsigned long)args->range.offset,
1949		(unsigned long)args->range.length,
1950		args->maxcount);
1951}
1952
1953static int
1954encode_layoutcommit(struct xdr_stream *xdr,
1955		    struct inode *inode,
1956		    struct nfs4_layoutcommit_args *args,
1957		    struct compound_hdr *hdr)
1958{
1959	__be32 *p;
1960
1961	dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1962		NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1963
1964	encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1965	p = reserve_space(xdr, 20);
1966	/* Only whole file layouts */
1967	p = xdr_encode_hyper(p, 0); /* offset */
1968	p = xdr_encode_hyper(p, args->lastbytewritten + 1);	/* length */
1969	*p = cpu_to_be32(0); /* reclaim */
1970	encode_nfs4_stateid(xdr, &args->stateid);
1971	p = reserve_space(xdr, 20);
1972	*p++ = cpu_to_be32(1); /* newoffset = TRUE */
1973	p = xdr_encode_hyper(p, args->lastbytewritten);
1974	*p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1975	*p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1976
1977	if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1978		NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1979			NFS_I(inode)->layout, xdr, args);
1980	} else {
1981		encode_uint32(xdr, args->layoutupdate_len);
1982		if (args->layoutupdate_pages) {
1983			xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1984					args->layoutupdate_len);
1985		}
1986	}
1987
1988	return 0;
1989}
1990
1991static void
1992encode_layoutreturn(struct xdr_stream *xdr,
1993		    const struct nfs4_layoutreturn_args *args,
1994		    struct compound_hdr *hdr)
1995{
1996	__be32 *p;
1997
1998	encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1999	p = reserve_space(xdr, 16);
2000	*p++ = cpu_to_be32(0);		/* reclaim. always 0 for now */
2001	*p++ = cpu_to_be32(args->layout_type);
2002	*p++ = cpu_to_be32(args->range.iomode);
2003	*p = cpu_to_be32(RETURN_FILE);
2004	p = reserve_space(xdr, 16);
2005	p = xdr_encode_hyper(p, args->range.offset);
2006	p = xdr_encode_hyper(p, args->range.length);
2007	spin_lock(&args->inode->i_lock);
2008	encode_nfs4_stateid(xdr, &args->stateid);
2009	spin_unlock(&args->inode->i_lock);
2010	if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2011		NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2012			NFS_I(args->inode)->layout, xdr, args);
2013	} else
2014		encode_uint32(xdr, 0);
2015}
2016
2017static int
2018encode_secinfo_no_name(struct xdr_stream *xdr,
2019		       const struct nfs41_secinfo_no_name_args *args,
2020		       struct compound_hdr *hdr)
2021{
2022	encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2023	encode_uint32(xdr, args->style);
2024	return 0;
2025}
2026
2027static void encode_test_stateid(struct xdr_stream *xdr,
2028				struct nfs41_test_stateid_args *args,
2029				struct compound_hdr *hdr)
2030{
2031	encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2032	encode_uint32(xdr, 1);
2033	encode_nfs4_stateid(xdr, args->stateid);
2034}
2035
2036static void encode_free_stateid(struct xdr_stream *xdr,
2037				struct nfs41_free_stateid_args *args,
2038				struct compound_hdr *hdr)
2039{
2040	encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2041	encode_nfs4_stateid(xdr, &args->stateid);
2042}
2043#endif /* CONFIG_NFS_V4_1 */
2044
2045/*
2046 * END OF "GENERIC" ENCODE ROUTINES.
2047 */
2048
2049static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2050{
2051#if defined(CONFIG_NFS_V4_1)
2052	struct nfs4_session *session = args->sa_slot->table->session;
2053	if (session)
2054		return session->clp->cl_mvops->minor_version;
2055#endif /* CONFIG_NFS_V4_1 */
2056	return 0;
2057}
2058
2059/*
2060 * Encode an ACCESS request
2061 */
2062static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2063				const struct nfs4_accessargs *args)
2064{
2065	struct compound_hdr hdr = {
2066		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2067	};
2068
2069	encode_compound_hdr(xdr, req, &hdr);
2070	encode_sequence(xdr, &args->seq_args, &hdr);
2071	encode_putfh(xdr, args->fh, &hdr);
2072	encode_access(xdr, args->access, &hdr);
2073	encode_getfattr(xdr, args->bitmask, &hdr);
2074	encode_nops(&hdr);
2075}
2076
2077/*
2078 * Encode LOOKUP request
2079 */
2080static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2081				const struct nfs4_lookup_arg *args)
2082{
2083	struct compound_hdr hdr = {
2084		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085	};
2086
2087	encode_compound_hdr(xdr, req, &hdr);
2088	encode_sequence(xdr, &args->seq_args, &hdr);
2089	encode_putfh(xdr, args->dir_fh, &hdr);
2090	encode_lookup(xdr, args->name, &hdr);
2091	encode_getfh(xdr, &hdr);
2092	encode_getfattr(xdr, args->bitmask, &hdr);
2093	encode_nops(&hdr);
2094}
2095
2096/*
2097 * Encode LOOKUP_ROOT request
2098 */
2099static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2100				     struct xdr_stream *xdr,
2101				     const struct nfs4_lookup_root_arg *args)
2102{
2103	struct compound_hdr hdr = {
2104		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105	};
2106
2107	encode_compound_hdr(xdr, req, &hdr);
2108	encode_sequence(xdr, &args->seq_args, &hdr);
2109	encode_putrootfh(xdr, &hdr);
2110	encode_getfh(xdr, &hdr);
2111	encode_getfattr(xdr, args->bitmask, &hdr);
2112	encode_nops(&hdr);
2113}
2114
2115/*
2116 * Encode REMOVE request
2117 */
2118static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2119				const struct nfs_removeargs *args)
2120{
2121	struct compound_hdr hdr = {
2122		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123	};
2124
2125	encode_compound_hdr(xdr, req, &hdr);
2126	encode_sequence(xdr, &args->seq_args, &hdr);
2127	encode_putfh(xdr, args->fh, &hdr);
2128	encode_remove(xdr, &args->name, &hdr);
2129	encode_nops(&hdr);
2130}
2131
2132/*
2133 * Encode RENAME request
2134 */
2135static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2136				const struct nfs_renameargs *args)
2137{
2138	struct compound_hdr hdr = {
2139		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140	};
2141
2142	encode_compound_hdr(xdr, req, &hdr);
2143	encode_sequence(xdr, &args->seq_args, &hdr);
2144	encode_putfh(xdr, args->old_dir, &hdr);
2145	encode_savefh(xdr, &hdr);
2146	encode_putfh(xdr, args->new_dir, &hdr);
2147	encode_rename(xdr, args->old_name, args->new_name, &hdr);
2148	encode_nops(&hdr);
2149}
2150
2151/*
2152 * Encode LINK request
2153 */
2154static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2155			     const struct nfs4_link_arg *args)
2156{
2157	struct compound_hdr hdr = {
2158		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159	};
2160
2161	encode_compound_hdr(xdr, req, &hdr);
2162	encode_sequence(xdr, &args->seq_args, &hdr);
2163	encode_putfh(xdr, args->fh, &hdr);
2164	encode_savefh(xdr, &hdr);
2165	encode_putfh(xdr, args->dir_fh, &hdr);
2166	encode_link(xdr, args->name, &hdr);
2167	encode_restorefh(xdr, &hdr);
2168	encode_getfattr(xdr, args->bitmask, &hdr);
2169	encode_nops(&hdr);
2170}
2171
2172/*
2173 * Encode CREATE request
2174 */
2175static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2176				const struct nfs4_create_arg *args)
2177{
2178	struct compound_hdr hdr = {
2179		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180	};
2181
2182	encode_compound_hdr(xdr, req, &hdr);
2183	encode_sequence(xdr, &args->seq_args, &hdr);
2184	encode_putfh(xdr, args->dir_fh, &hdr);
2185	encode_create(xdr, args, &hdr);
2186	encode_getfh(xdr, &hdr);
2187	encode_getfattr(xdr, args->bitmask, &hdr);
2188	encode_nops(&hdr);
2189}
2190
2191/*
2192 * Encode SYMLINK request
2193 */
2194static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2195				 const struct nfs4_create_arg *args)
2196{
2197	nfs4_xdr_enc_create(req, xdr, args);
2198}
2199
2200/*
2201 * Encode GETATTR request
2202 */
2203static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2204				 const struct nfs4_getattr_arg *args)
2205{
2206	struct compound_hdr hdr = {
2207		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2208	};
2209
2210	encode_compound_hdr(xdr, req, &hdr);
2211	encode_sequence(xdr, &args->seq_args, &hdr);
2212	encode_putfh(xdr, args->fh, &hdr);
2213	encode_getfattr(xdr, args->bitmask, &hdr);
2214	encode_nops(&hdr);
2215}
2216
2217/*
2218 * Encode a CLOSE request
2219 */
2220static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2221			       struct nfs_closeargs *args)
2222{
2223	struct compound_hdr hdr = {
2224		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225	};
2226
2227	encode_compound_hdr(xdr, req, &hdr);
2228	encode_sequence(xdr, &args->seq_args, &hdr);
2229	encode_putfh(xdr, args->fh, &hdr);
2230	encode_close(xdr, args, &hdr);
2231	encode_getfattr(xdr, args->bitmask, &hdr);
2232	encode_nops(&hdr);
2233}
2234
2235/*
2236 * Encode an OPEN request
2237 */
2238static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2239			      struct nfs_openargs *args)
2240{
2241	struct compound_hdr hdr = {
2242		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243	};
2244
2245	encode_compound_hdr(xdr, req, &hdr);
2246	encode_sequence(xdr, &args->seq_args, &hdr);
2247	encode_putfh(xdr, args->fh, &hdr);
2248	encode_open(xdr, args, &hdr);
2249	encode_getfh(xdr, &hdr);
2250	if (args->access)
2251		encode_access(xdr, args->access, &hdr);
2252	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2253	encode_nops(&hdr);
2254}
2255
2256/*
2257 * Encode an OPEN_CONFIRM request
2258 */
2259static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2260				      struct xdr_stream *xdr,
2261				      struct nfs_open_confirmargs *args)
2262{
2263	struct compound_hdr hdr = {
2264		.nops   = 0,
2265	};
2266
2267	encode_compound_hdr(xdr, req, &hdr);
2268	encode_putfh(xdr, args->fh, &hdr);
2269	encode_open_confirm(xdr, args, &hdr);
2270	encode_nops(&hdr);
2271}
2272
2273/*
2274 * Encode an OPEN request with no attributes.
2275 */
2276static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2277				     struct xdr_stream *xdr,
2278				     struct nfs_openargs *args)
2279{
2280	struct compound_hdr hdr = {
2281		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2282	};
2283
2284	encode_compound_hdr(xdr, req, &hdr);
2285	encode_sequence(xdr, &args->seq_args, &hdr);
2286	encode_putfh(xdr, args->fh, &hdr);
2287	encode_open(xdr, args, &hdr);
2288	if (args->access)
2289		encode_access(xdr, args->access, &hdr);
2290	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2291	encode_nops(&hdr);
2292}
2293
2294/*
2295 * Encode an OPEN_DOWNGRADE request
2296 */
2297static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2298					struct xdr_stream *xdr,
2299					struct nfs_closeargs *args)
2300{
2301	struct compound_hdr hdr = {
2302		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303	};
2304
2305	encode_compound_hdr(xdr, req, &hdr);
2306	encode_sequence(xdr, &args->seq_args, &hdr);
2307	encode_putfh(xdr, args->fh, &hdr);
2308	encode_open_downgrade(xdr, args, &hdr);
2309	encode_getfattr(xdr, args->bitmask, &hdr);
2310	encode_nops(&hdr);
2311}
2312
2313/*
2314 * Encode a LOCK request
2315 */
2316static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2317			      struct nfs_lock_args *args)
2318{
2319	struct compound_hdr hdr = {
2320		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321	};
2322
2323	encode_compound_hdr(xdr, req, &hdr);
2324	encode_sequence(xdr, &args->seq_args, &hdr);
2325	encode_putfh(xdr, args->fh, &hdr);
2326	encode_lock(xdr, args, &hdr);
2327	encode_nops(&hdr);
2328}
2329
2330/*
2331 * Encode a LOCKT request
2332 */
2333static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2334			       struct nfs_lockt_args *args)
2335{
2336	struct compound_hdr hdr = {
2337		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338	};
2339
2340	encode_compound_hdr(xdr, req, &hdr);
2341	encode_sequence(xdr, &args->seq_args, &hdr);
2342	encode_putfh(xdr, args->fh, &hdr);
2343	encode_lockt(xdr, args, &hdr);
2344	encode_nops(&hdr);
2345}
2346
2347/*
2348 * Encode a LOCKU request
2349 */
2350static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2351			       struct nfs_locku_args *args)
2352{
2353	struct compound_hdr hdr = {
2354		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355	};
2356
2357	encode_compound_hdr(xdr, req, &hdr);
2358	encode_sequence(xdr, &args->seq_args, &hdr);
2359	encode_putfh(xdr, args->fh, &hdr);
2360	encode_locku(xdr, args, &hdr);
2361	encode_nops(&hdr);
2362}
2363
2364static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2365					   struct xdr_stream *xdr,
2366					struct nfs_release_lockowner_args *args)
2367{
2368	struct compound_hdr hdr = {
2369		.minorversion = 0,
2370	};
2371
2372	encode_compound_hdr(xdr, req, &hdr);
2373	encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2374	encode_nops(&hdr);
2375}
2376
2377/*
2378 * Encode a READLINK request
2379 */
2380static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2381				  const struct nfs4_readlink *args)
2382{
2383	struct compound_hdr hdr = {
2384		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385	};
2386
2387	encode_compound_hdr(xdr, req, &hdr);
2388	encode_sequence(xdr, &args->seq_args, &hdr);
2389	encode_putfh(xdr, args->fh, &hdr);
2390	encode_readlink(xdr, args, req, &hdr);
2391
2392	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2393			args->pgbase, args->pglen);
2394	encode_nops(&hdr);
2395}
2396
2397/*
2398 * Encode a READDIR request
2399 */
2400static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2401				 const struct nfs4_readdir_arg *args)
2402{
2403	struct compound_hdr hdr = {
2404		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405	};
2406
2407	encode_compound_hdr(xdr, req, &hdr);
2408	encode_sequence(xdr, &args->seq_args, &hdr);
2409	encode_putfh(xdr, args->fh, &hdr);
2410	encode_readdir(xdr, args, req, &hdr);
2411
2412	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2413			 args->pgbase, args->count);
2414	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2415			__func__, hdr.replen << 2, args->pages,
2416			args->pgbase, args->count);
2417	encode_nops(&hdr);
2418}
2419
2420/*
2421 * Encode a READ request
2422 */
2423static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2424			      struct nfs_pgio_args *args)
2425{
2426	struct compound_hdr hdr = {
2427		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428	};
2429
2430	encode_compound_hdr(xdr, req, &hdr);
2431	encode_sequence(xdr, &args->seq_args, &hdr);
2432	encode_putfh(xdr, args->fh, &hdr);
2433	encode_read(xdr, args, &hdr);
2434
2435	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2436			 args->pages, args->pgbase, args->count);
2437	req->rq_rcv_buf.flags |= XDRBUF_READ;
2438	encode_nops(&hdr);
2439}
2440
2441/*
2442 * Encode an SETATTR request
2443 */
2444static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2445				 struct nfs_setattrargs *args)
2446{
2447	struct compound_hdr hdr = {
2448		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449	};
2450
2451	encode_compound_hdr(xdr, req, &hdr);
2452	encode_sequence(xdr, &args->seq_args, &hdr);
2453	encode_putfh(xdr, args->fh, &hdr);
2454	encode_setattr(xdr, args, args->server, &hdr);
2455	encode_getfattr(xdr, args->bitmask, &hdr);
2456	encode_nops(&hdr);
2457}
2458
2459/*
2460 * Encode a GETACL request
2461 */
2462static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2463				struct nfs_getaclargs *args)
2464{
2465	struct compound_hdr hdr = {
2466		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467	};
2468	uint32_t replen;
2469
2470	encode_compound_hdr(xdr, req, &hdr);
2471	encode_sequence(xdr, &args->seq_args, &hdr);
2472	encode_putfh(xdr, args->fh, &hdr);
2473	replen = hdr.replen + op_decode_hdr_maxsz + 1;
2474	encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2475
2476	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2477		args->acl_pages, args->acl_pgbase, args->acl_len);
2478
2479	encode_nops(&hdr);
2480}
2481
2482/*
2483 * Encode a WRITE request
2484 */
2485static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2486			       struct nfs_pgio_args *args)
2487{
2488	struct compound_hdr hdr = {
2489		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2490	};
2491
2492	encode_compound_hdr(xdr, req, &hdr);
2493	encode_sequence(xdr, &args->seq_args, &hdr);
2494	encode_putfh(xdr, args->fh, &hdr);
2495	encode_write(xdr, args, &hdr);
2496	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2497	if (args->bitmask)
2498		encode_getfattr(xdr, args->bitmask, &hdr);
2499	encode_nops(&hdr);
2500}
2501
2502/*
2503 *  a COMMIT request
2504 */
2505static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2506				struct nfs_commitargs *args)
2507{
2508	struct compound_hdr hdr = {
2509		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2510	};
2511
2512	encode_compound_hdr(xdr, req, &hdr);
2513	encode_sequence(xdr, &args->seq_args, &hdr);
2514	encode_putfh(xdr, args->fh, &hdr);
2515	encode_commit(xdr, args, &hdr);
2516	encode_nops(&hdr);
2517}
2518
2519/*
2520 * FSINFO request
2521 */
2522static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2523				struct nfs4_fsinfo_arg *args)
2524{
2525	struct compound_hdr hdr = {
2526		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527	};
2528
2529	encode_compound_hdr(xdr, req, &hdr);
2530	encode_sequence(xdr, &args->seq_args, &hdr);
2531	encode_putfh(xdr, args->fh, &hdr);
2532	encode_fsinfo(xdr, args->bitmask, &hdr);
2533	encode_nops(&hdr);
2534}
2535
2536/*
2537 * a PATHCONF request
2538 */
2539static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2540				  const struct nfs4_pathconf_arg *args)
2541{
2542	struct compound_hdr hdr = {
2543		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544	};
2545
2546	encode_compound_hdr(xdr, req, &hdr);
2547	encode_sequence(xdr, &args->seq_args, &hdr);
2548	encode_putfh(xdr, args->fh, &hdr);
2549	encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2550			   &hdr);
2551	encode_nops(&hdr);
2552}
2553
2554/*
2555 * a STATFS request
2556 */
2557static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2558				const struct nfs4_statfs_arg *args)
2559{
2560	struct compound_hdr hdr = {
2561		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2562	};
2563
2564	encode_compound_hdr(xdr, req, &hdr);
2565	encode_sequence(xdr, &args->seq_args, &hdr);
2566	encode_putfh(xdr, args->fh, &hdr);
2567	encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2568			   args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2569	encode_nops(&hdr);
2570}
2571
2572/*
2573 * GETATTR_BITMAP request
2574 */
2575static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2576				     struct xdr_stream *xdr,
2577				     struct nfs4_server_caps_arg *args)
2578{
2579	struct compound_hdr hdr = {
2580		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581	};
2582
2583	encode_compound_hdr(xdr, req, &hdr);
2584	encode_sequence(xdr, &args->seq_args, &hdr);
2585	encode_putfh(xdr, args->fhandle, &hdr);
2586	encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2587			   FATTR4_WORD0_FH_EXPIRE_TYPE|
2588			   FATTR4_WORD0_LINK_SUPPORT|
2589			   FATTR4_WORD0_SYMLINK_SUPPORT|
2590			   FATTR4_WORD0_ACLSUPPORT, &hdr);
2591	encode_nops(&hdr);
2592}
2593
2594/*
2595 * a RENEW request
2596 */
2597static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2598			       struct nfs_client *clp)
2599{
2600	struct compound_hdr hdr = {
2601		.nops	= 0,
2602	};
2603
2604	encode_compound_hdr(xdr, req, &hdr);
2605	encode_renew(xdr, clp->cl_clientid, &hdr);
2606	encode_nops(&hdr);
2607}
2608
2609/*
2610 * a SETCLIENTID request
2611 */
2612static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2613				     struct xdr_stream *xdr,
2614				     struct nfs4_setclientid *sc)
2615{
2616	struct compound_hdr hdr = {
2617		.nops	= 0,
2618	};
2619
2620	encode_compound_hdr(xdr, req, &hdr);
2621	encode_setclientid(xdr, sc, &hdr);
2622	encode_nops(&hdr);
2623}
2624
2625/*
2626 * a SETCLIENTID_CONFIRM request
2627 */
2628static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2629					     struct xdr_stream *xdr,
2630					     struct nfs4_setclientid_res *arg)
2631{
2632	struct compound_hdr hdr = {
2633		.nops	= 0,
2634	};
2635
2636	encode_compound_hdr(xdr, req, &hdr);
2637	encode_setclientid_confirm(xdr, arg, &hdr);
2638	encode_nops(&hdr);
2639}
2640
2641/*
2642 * DELEGRETURN request
2643 */
2644static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2645				     struct xdr_stream *xdr,
2646				     const struct nfs4_delegreturnargs *args)
2647{
2648	struct compound_hdr hdr = {
2649		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2650	};
2651
2652	encode_compound_hdr(xdr, req, &hdr);
2653	encode_sequence(xdr, &args->seq_args, &hdr);
2654	encode_putfh(xdr, args->fhandle, &hdr);
2655	encode_getfattr(xdr, args->bitmask, &hdr);
2656	encode_delegreturn(xdr, args->stateid, &hdr);
2657	encode_nops(&hdr);
2658}
2659
2660/*
2661 * Encode FS_LOCATIONS request
2662 */
2663static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2664				      struct xdr_stream *xdr,
2665				      struct nfs4_fs_locations_arg *args)
2666{
2667	struct compound_hdr hdr = {
2668		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669	};
2670	uint32_t replen;
2671
2672	encode_compound_hdr(xdr, req, &hdr);
2673	encode_sequence(xdr, &args->seq_args, &hdr);
2674	if (args->migration) {
2675		encode_putfh(xdr, args->fh, &hdr);
2676		replen = hdr.replen;
2677		encode_fs_locations(xdr, args->bitmask, &hdr);
2678		if (args->renew)
2679			encode_renew(xdr, args->clientid, &hdr);
2680	} else {
2681		encode_putfh(xdr, args->dir_fh, &hdr);
2682		encode_lookup(xdr, args->name, &hdr);
2683		replen = hdr.replen;
2684		encode_fs_locations(xdr, args->bitmask, &hdr);
2685	}
2686
2687	/* Set up reply kvec to capture returned fs_locations array. */
2688	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2689			0, PAGE_SIZE);
2690	encode_nops(&hdr);
2691}
2692
2693/*
2694 * Encode SECINFO request
2695 */
2696static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2697				struct xdr_stream *xdr,
2698				struct nfs4_secinfo_arg *args)
2699{
2700	struct compound_hdr hdr = {
2701		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702	};
2703
2704	encode_compound_hdr(xdr, req, &hdr);
2705	encode_sequence(xdr, &args->seq_args, &hdr);
2706	encode_putfh(xdr, args->dir_fh, &hdr);
2707	encode_secinfo(xdr, args->name, &hdr);
2708	encode_nops(&hdr);
2709}
2710
2711/*
2712 * Encode FSID_PRESENT request
2713 */
2714static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2715				      struct xdr_stream *xdr,
2716				      struct nfs4_fsid_present_arg *args)
2717{
2718	struct compound_hdr hdr = {
2719		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720	};
2721
2722	encode_compound_hdr(xdr, req, &hdr);
2723	encode_sequence(xdr, &args->seq_args, &hdr);
2724	encode_putfh(xdr, args->fh, &hdr);
2725	encode_getfh(xdr, &hdr);
2726	if (args->renew)
2727		encode_renew(xdr, args->clientid, &hdr);
2728	encode_nops(&hdr);
2729}
2730
2731#if defined(CONFIG_NFS_V4_1)
2732/*
2733 * BIND_CONN_TO_SESSION request
2734 */
2735static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2736				struct xdr_stream *xdr,
2737				struct nfs41_bind_conn_to_session_args *args)
2738{
2739	struct compound_hdr hdr = {
2740		.minorversion = args->client->cl_mvops->minor_version,
2741	};
2742
2743	encode_compound_hdr(xdr, req, &hdr);
2744	encode_bind_conn_to_session(xdr, args, &hdr);
2745	encode_nops(&hdr);
2746}
2747
2748/*
2749 * EXCHANGE_ID request
2750 */
2751static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2752				     struct xdr_stream *xdr,
2753				     struct nfs41_exchange_id_args *args)
2754{
2755	struct compound_hdr hdr = {
2756		.minorversion = args->client->cl_mvops->minor_version,
2757	};
2758
2759	encode_compound_hdr(xdr, req, &hdr);
2760	encode_exchange_id(xdr, args, &hdr);
2761	encode_nops(&hdr);
2762}
2763
2764/*
2765 * a CREATE_SESSION request
2766 */
2767static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2768					struct xdr_stream *xdr,
2769					struct nfs41_create_session_args *args)
2770{
2771	struct compound_hdr hdr = {
2772		.minorversion = args->client->cl_mvops->minor_version,
2773	};
2774
2775	encode_compound_hdr(xdr, req, &hdr);
2776	encode_create_session(xdr, args, &hdr);
2777	encode_nops(&hdr);
2778}
2779
2780/*
2781 * a DESTROY_SESSION request
2782 */
2783static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2784					 struct xdr_stream *xdr,
2785					 struct nfs4_session *session)
2786{
2787	struct compound_hdr hdr = {
2788		.minorversion = session->clp->cl_mvops->minor_version,
2789	};
2790
2791	encode_compound_hdr(xdr, req, &hdr);
2792	encode_destroy_session(xdr, session, &hdr);
2793	encode_nops(&hdr);
2794}
2795
2796/*
2797 * a DESTROY_CLIENTID request
2798 */
2799static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2800					 struct xdr_stream *xdr,
2801					 struct nfs_client *clp)
2802{
2803	struct compound_hdr hdr = {
2804		.minorversion = clp->cl_mvops->minor_version,
2805	};
2806
2807	encode_compound_hdr(xdr, req, &hdr);
2808	encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2809	encode_nops(&hdr);
2810}
2811
2812/*
2813 * a SEQUENCE request
2814 */
2815static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2816				  struct nfs4_sequence_args *args)
2817{
2818	struct compound_hdr hdr = {
2819		.minorversion = nfs4_xdr_minorversion(args),
2820	};
2821
2822	encode_compound_hdr(xdr, req, &hdr);
2823	encode_sequence(xdr, args, &hdr);
2824	encode_nops(&hdr);
2825}
2826
2827/*
2828 * a GET_LEASE_TIME request
2829 */
2830static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2831					struct xdr_stream *xdr,
2832					struct nfs4_get_lease_time_args *args)
2833{
2834	struct compound_hdr hdr = {
2835		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2836	};
2837	const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2838
2839	encode_compound_hdr(xdr, req, &hdr);
2840	encode_sequence(xdr, &args->la_seq_args, &hdr);
2841	encode_putrootfh(xdr, &hdr);
2842	encode_fsinfo(xdr, lease_bitmap, &hdr);
2843	encode_nops(&hdr);
2844}
2845
2846/*
2847 * a RECLAIM_COMPLETE request
2848 */
2849static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2850					  struct xdr_stream *xdr,
2851				struct nfs41_reclaim_complete_args *args)
2852{
2853	struct compound_hdr hdr = {
2854		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
2855	};
2856
2857	encode_compound_hdr(xdr, req, &hdr);
2858	encode_sequence(xdr, &args->seq_args, &hdr);
2859	encode_reclaim_complete(xdr, args, &hdr);
2860	encode_nops(&hdr);
2861}
2862
2863/*
2864 * Encode GETDEVICEINFO request
2865 */
2866static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2867				       struct xdr_stream *xdr,
2868				       struct nfs4_getdeviceinfo_args *args)
2869{
2870	struct compound_hdr hdr = {
2871		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2872	};
2873
2874	encode_compound_hdr(xdr, req, &hdr);
2875	encode_sequence(xdr, &args->seq_args, &hdr);
2876	encode_getdeviceinfo(xdr, args, &hdr);
2877
2878	/* set up reply kvec. Subtract notification bitmap max size (2)
2879	 * so that notification bitmap is put in xdr_buf tail */
2880	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2881			 args->pdev->pages, args->pdev->pgbase,
2882			 args->pdev->pglen);
2883
2884	encode_nops(&hdr);
2885}
2886
2887/*
2888 *  Encode LAYOUTGET request
2889 */
2890static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2891				   struct xdr_stream *xdr,
2892				   struct nfs4_layoutget_args *args)
2893{
2894	struct compound_hdr hdr = {
2895		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2896	};
2897
2898	encode_compound_hdr(xdr, req, &hdr);
2899	encode_sequence(xdr, &args->seq_args, &hdr);
2900	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2901	encode_layoutget(xdr, args, &hdr);
2902
2903	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2904	    args->layout.pages, 0, args->layout.pglen);
2905
2906	encode_nops(&hdr);
2907}
2908
2909/*
2910 *  Encode LAYOUTCOMMIT request
2911 */
2912static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2913				      struct xdr_stream *xdr,
2914				      struct nfs4_layoutcommit_args *args)
2915{
2916	struct nfs4_layoutcommit_data *data =
2917		container_of(args, struct nfs4_layoutcommit_data, args);
2918	struct compound_hdr hdr = {
2919		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920	};
2921
2922	encode_compound_hdr(xdr, req, &hdr);
2923	encode_sequence(xdr, &args->seq_args, &hdr);
2924	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2925	encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2926	encode_getfattr(xdr, args->bitmask, &hdr);
2927	encode_nops(&hdr);
2928}
2929
2930/*
2931 * Encode LAYOUTRETURN request
2932 */
2933static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2934				      struct xdr_stream *xdr,
2935				      struct nfs4_layoutreturn_args *args)
2936{
2937	struct compound_hdr hdr = {
2938		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939	};
2940
2941	encode_compound_hdr(xdr, req, &hdr);
2942	encode_sequence(xdr, &args->seq_args, &hdr);
2943	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944	encode_layoutreturn(xdr, args, &hdr);
2945	encode_nops(&hdr);
2946}
2947
2948/*
2949 * Encode SECINFO_NO_NAME request
2950 */
2951static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2952					struct xdr_stream *xdr,
2953					struct nfs41_secinfo_no_name_args *args)
2954{
2955	struct compound_hdr hdr = {
2956		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2957	};
2958
2959	encode_compound_hdr(xdr, req, &hdr);
2960	encode_sequence(xdr, &args->seq_args, &hdr);
2961	encode_putrootfh(xdr, &hdr);
2962	encode_secinfo_no_name(xdr, args, &hdr);
2963	encode_nops(&hdr);
2964	return 0;
2965}
2966
2967/*
2968 *  Encode TEST_STATEID request
2969 */
2970static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2971				      struct xdr_stream *xdr,
2972				      struct nfs41_test_stateid_args *args)
2973{
2974	struct compound_hdr hdr = {
2975		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976	};
2977
2978	encode_compound_hdr(xdr, req, &hdr);
2979	encode_sequence(xdr, &args->seq_args, &hdr);
2980	encode_test_stateid(xdr, args, &hdr);
2981	encode_nops(&hdr);
2982}
2983
2984/*
2985 *  Encode FREE_STATEID request
2986 */
2987static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2988				     struct xdr_stream *xdr,
2989				     struct nfs41_free_stateid_args *args)
2990{
2991	struct compound_hdr hdr = {
2992		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993	};
2994
2995	encode_compound_hdr(xdr, req, &hdr);
2996	encode_sequence(xdr, &args->seq_args, &hdr);
2997	encode_free_stateid(xdr, args, &hdr);
2998	encode_nops(&hdr);
2999}
3000#endif /* CONFIG_NFS_V4_1 */
3001
3002static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3003{
3004	dprintk("nfs: %s: prematurely hit end of receive buffer. "
3005		"Remaining buffer length is %tu words.\n",
3006		func, xdr->end - xdr->p);
3007}
3008
3009static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3010{
3011	__be32 *p;
3012
3013	p = xdr_inline_decode(xdr, 4);
3014	if (unlikely(!p))
3015		goto out_overflow;
3016	*len = be32_to_cpup(p);
3017	p = xdr_inline_decode(xdr, *len);
3018	if (unlikely(!p))
3019		goto out_overflow;
3020	*string = (char *)p;
3021	return 0;
3022out_overflow:
3023	print_overflow_msg(__func__, xdr);
3024	return -EIO;
3025}
3026
3027static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3028{
3029	__be32 *p;
3030
3031	p = xdr_inline_decode(xdr, 8);
3032	if (unlikely(!p))
3033		goto out_overflow;
3034	hdr->status = be32_to_cpup(p++);
3035	hdr->taglen = be32_to_cpup(p);
3036
3037	p = xdr_inline_decode(xdr, hdr->taglen + 4);
3038	if (unlikely(!p))
3039		goto out_overflow;
3040	hdr->tag = (char *)p;
3041	p += XDR_QUADLEN(hdr->taglen);
3042	hdr->nops = be32_to_cpup(p);
3043	if (unlikely(hdr->nops < 1))
3044		return nfs4_stat_to_errno(hdr->status);
3045	return 0;
3046out_overflow:
3047	print_overflow_msg(__func__, xdr);
3048	return -EIO;
3049}
3050
3051static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3052		int *nfs_retval)
3053{
3054	__be32 *p;
3055	uint32_t opnum;
3056	int32_t nfserr;
3057
3058	p = xdr_inline_decode(xdr, 8);
3059	if (unlikely(!p))
3060		goto out_overflow;
3061	opnum = be32_to_cpup(p++);
3062	if (unlikely(opnum != expected))
3063		goto out_bad_operation;
3064	nfserr = be32_to_cpup(p);
3065	if (nfserr == NFS_OK)
3066		*nfs_retval = 0;
3067	else
3068		*nfs_retval = nfs4_stat_to_errno(nfserr);
3069	return true;
3070out_bad_operation:
3071	dprintk("nfs: Server returned operation"
3072		" %d but we issued a request for %d\n",
3073			opnum, expected);
3074	*nfs_retval = -EREMOTEIO;
3075	return false;
3076out_overflow:
3077	print_overflow_msg(__func__, xdr);
3078	*nfs_retval = -EIO;
3079	return false;
3080}
3081
3082static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3083{
3084	int retval;
3085
3086	__decode_op_hdr(xdr, expected, &retval);
3087	return retval;
3088}
3089
3090/* Dummy routine */
3091static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3092{
3093	__be32 *p;
3094	unsigned int strlen;
3095	char *str;
3096
3097	p = xdr_inline_decode(xdr, 12);
3098	if (likely(p))
3099		return decode_opaque_inline(xdr, &strlen, &str);
3100	print_overflow_msg(__func__, xdr);
3101	return -EIO;
3102}
3103
3104static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3105{
3106	uint32_t bmlen;
3107	__be32 *p;
3108
3109	p = xdr_inline_decode(xdr, 4);
3110	if (unlikely(!p))
3111		goto out_overflow;
3112	bmlen = be32_to_cpup(p);
3113
3114	bitmap[0] = bitmap[1] = bitmap[2] = 0;
3115	p = xdr_inline_decode(xdr, (bmlen << 2));
3116	if (unlikely(!p))
3117		goto out_overflow;
3118	if (bmlen > 0) {
3119		bitmap[0] = be32_to_cpup(p++);
3120		if (bmlen > 1) {
3121			bitmap[1] = be32_to_cpup(p++);
3122			if (bmlen > 2)
3123				bitmap[2] = be32_to_cpup(p);
3124		}
3125	}
3126	return 0;
3127out_overflow:
3128	print_overflow_msg(__func__, xdr);
3129	return -EIO;
3130}
3131
3132static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3133{
3134	__be32 *p;
3135
3136	p = xdr_inline_decode(xdr, 4);
3137	if (unlikely(!p))
3138		goto out_overflow;
3139	*attrlen = be32_to_cpup(p);
3140	*savep = xdr_stream_pos(xdr);
3141	return 0;
3142out_overflow:
3143	print_overflow_msg(__func__, xdr);
3144	return -EIO;
3145}
3146
3147static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3148{
3149	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3150		int ret;
3151		ret = decode_attr_bitmap(xdr, bitmask);
3152		if (unlikely(ret < 0))
3153			return ret;
3154		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3155	} else
3156		bitmask[0] = bitmask[1] = bitmask[2] = 0;
3157	dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3158		bitmask[0], bitmask[1], bitmask[2]);
3159	return 0;
3160}
3161
3162static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3163{
3164	__be32 *p;
3165	int ret = 0;
3166
3167	*type = 0;
3168	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3169		return -EIO;
3170	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3171		p = xdr_inline_decode(xdr, 4);
3172		if (unlikely(!p))
3173			goto out_overflow;
3174		*type = be32_to_cpup(p);
3175		if (*type < NF4REG || *type > NF4NAMEDATTR) {
3176			dprintk("%s: bad type %d\n", __func__, *type);
3177			return -EIO;
3178		}
3179		bitmap[0] &= ~FATTR4_WORD0_TYPE;
3180		ret = NFS_ATTR_FATTR_TYPE;
3181	}
3182	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3183	return ret;
3184out_overflow:
3185	print_overflow_msg(__func__, xdr);
3186	return -EIO;
3187}
3188
3189static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3190				      uint32_t *bitmap, uint32_t *type)
3191{
3192	__be32 *p;
3193
3194	*type = 0;
3195	if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3196		return -EIO;
3197	if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3198		p = xdr_inline_decode(xdr, 4);
3199		if (unlikely(!p))
3200			goto out_overflow;
3201		*type = be32_to_cpup(p);
3202		bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3203	}
3204	dprintk("%s: expire type=0x%x\n", __func__, *type);
3205	return 0;
3206out_overflow:
3207	print_overflow_msg(__func__, xdr);
3208	return -EIO;
3209}
3210
3211static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3212{
3213	__be32 *p;
3214	int ret = 0;
3215
3216	*change = 0;
3217	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3218		return -EIO;
3219	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3220		p = xdr_inline_decode(xdr, 8);
3221		if (unlikely(!p))
3222			goto out_overflow;
3223		xdr_decode_hyper(p, change);
3224		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3225		ret = NFS_ATTR_FATTR_CHANGE;
3226	}
3227	dprintk("%s: change attribute=%Lu\n", __func__,
3228			(unsigned long long)*change);
3229	return ret;
3230out_overflow:
3231	print_overflow_msg(__func__, xdr);
3232	return -EIO;
3233}
3234
3235static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3236{
3237	__be32 *p;
3238	int ret = 0;
3239
3240	*size = 0;
3241	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3242		return -EIO;
3243	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3244		p = xdr_inline_decode(xdr, 8);
3245		if (unlikely(!p))
3246			goto out_overflow;
3247		xdr_decode_hyper(p, size);
3248		bitmap[0] &= ~FATTR4_WORD0_SIZE;
3249		ret = NFS_ATTR_FATTR_SIZE;
3250	}
3251	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3252	return ret;
3253out_overflow:
3254	print_overflow_msg(__func__, xdr);
3255	return -EIO;
3256}
3257
3258static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3259{
3260	__be32 *p;
3261
3262	*res = 0;
3263	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3264		return -EIO;
3265	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3266		p = xdr_inline_decode(xdr, 4);
3267		if (unlikely(!p))
3268			goto out_overflow;
3269		*res = be32_to_cpup(p);
3270		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3271	}
3272	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3273	return 0;
3274out_overflow:
3275	print_overflow_msg(__func__, xdr);
3276	return -EIO;
3277}
3278
3279static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3280{
3281	__be32 *p;
3282
3283	*res = 0;
3284	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3285		return -EIO;
3286	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3287		p = xdr_inline_decode(xdr, 4);
3288		if (unlikely(!p))
3289			goto out_overflow;
3290		*res = be32_to_cpup(p);
3291		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3292	}
3293	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3294	return 0;
3295out_overflow:
3296	print_overflow_msg(__func__, xdr);
3297	return -EIO;
3298}
3299
3300static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3301{
3302	__be32 *p;
3303	int ret = 0;
3304
3305	fsid->major = 0;
3306	fsid->minor = 0;
3307	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3308		return -EIO;
3309	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3310		p = xdr_inline_decode(xdr, 16);
3311		if (unlikely(!p))
3312			goto out_overflow;
3313		p = xdr_decode_hyper(p, &fsid->major);
3314		xdr_decode_hyper(p, &fsid->minor);
3315		bitmap[0] &= ~FATTR4_WORD0_FSID;
3316		ret = NFS_ATTR_FATTR_FSID;
3317	}
3318	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3319			(unsigned long long)fsid->major,
3320			(unsigned long long)fsid->minor);
3321	return ret;
3322out_overflow:
3323	print_overflow_msg(__func__, xdr);
3324	return -EIO;
3325}
3326
3327static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3328{
3329	__be32 *p;
3330
3331	*res = 60;
3332	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3333		return -EIO;
3334	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3335		p = xdr_inline_decode(xdr, 4);
3336		if (unlikely(!p))
3337			goto out_overflow;
3338		*res = be32_to_cpup(p);
3339		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3340	}
3341	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3342	return 0;
3343out_overflow:
3344	print_overflow_msg(__func__, xdr);
3345	return -EIO;
3346}
3347
3348static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3349{
3350	__be32 *p;
3351
3352	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3353		return -EIO;
3354	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3355		p = xdr_inline_decode(xdr, 4);
3356		if (unlikely(!p))
3357			goto out_overflow;
3358		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3359		*res = -be32_to_cpup(p);
3360	}
3361	return 0;
3362out_overflow:
3363	print_overflow_msg(__func__, xdr);
3364	return -EIO;
3365}
3366
3367static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3368{
3369	__be32 *p;
3370	int len;
3371
3372	if (fh != NULL)
3373		memset(fh, 0, sizeof(*fh));
3374
3375	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3376		return -EIO;
3377	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3378		p = xdr_inline_decode(xdr, 4);
3379		if (unlikely(!p))
3380			goto out_overflow;
3381		len = be32_to_cpup(p);
3382		if (len > NFS4_FHSIZE)
3383			return -EIO;
3384		p = xdr_inline_decode(xdr, len);
3385		if (unlikely(!p))
3386			goto out_overflow;
3387		if (fh != NULL) {
3388			memcpy(fh->data, p, len);
3389			fh->size = len;
3390		}
3391		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3392	}
3393	return 0;
3394out_overflow:
3395	print_overflow_msg(__func__, xdr);
3396	return -EIO;
3397}
3398
3399static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3400{
3401	__be32 *p;
3402
3403	*res = 0;
3404	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3405		return -EIO;
3406	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3407		p = xdr_inline_decode(xdr, 4);
3408		if (unlikely(!p))
3409			goto out_overflow;
3410		*res = be32_to_cpup(p);
3411		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3412	}
3413	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3414	return 0;
3415out_overflow:
3416	print_overflow_msg(__func__, xdr);
3417	return -EIO;
3418}
3419
3420static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3421{
3422	__be32 *p;
3423	int ret = 0;
3424
3425	*fileid = 0;
3426	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3427		return -EIO;
3428	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3429		p = xdr_inline_decode(xdr, 8);
3430		if (unlikely(!p))
3431			goto out_overflow;
3432		xdr_decode_hyper(p, fileid);
3433		bitmap[0] &= ~FATTR4_WORD0_FILEID;
3434		ret = NFS_ATTR_FATTR_FILEID;
3435	}
3436	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3437	return ret;
3438out_overflow:
3439	print_overflow_msg(__func__, xdr);
3440	return -EIO;
3441}
3442
3443static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3444{
3445	__be32 *p;
3446	int ret = 0;
3447
3448	*fileid = 0;
3449	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3450		return -EIO;
3451	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3452		p = xdr_inline_decode(xdr, 8);
3453		if (unlikely(!p))
3454			goto out_overflow;
3455		xdr_decode_hyper(p, fileid);
3456		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3457		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3458	}
3459	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3460	return ret;
3461out_overflow:
3462	print_overflow_msg(__func__, xdr);
3463	return -EIO;
3464}
3465
3466static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3467{
3468	__be32 *p;
3469	int status = 0;
3470
3471	*res = 0;
3472	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3473		return -EIO;
3474	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3475		p = xdr_inline_decode(xdr, 8);
3476		if (unlikely(!p))
3477			goto out_overflow;
3478		xdr_decode_hyper(p, res);
3479		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3480	}
3481	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3482	return status;
3483out_overflow:
3484	print_overflow_msg(__func__, xdr);
3485	return -EIO;
3486}
3487
3488static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3489{
3490	__be32 *p;
3491	int status = 0;
3492
3493	*res = 0;
3494	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3495		return -EIO;
3496	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3497		p = xdr_inline_decode(xdr, 8);
3498		if (unlikely(!p))
3499			goto out_overflow;
3500		xdr_decode_hyper(p, res);
3501		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3502	}
3503	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3504	return status;
3505out_overflow:
3506	print_overflow_msg(__func__, xdr);
3507	return -EIO;
3508}
3509
3510static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3511{
3512	__be32 *p;
3513	int status = 0;
3514
3515	*res = 0;
3516	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3517		return -EIO;
3518	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3519		p = xdr_inline_decode(xdr, 8);
3520		if (unlikely(!p))
3521			goto out_overflow;
3522		xdr_decode_hyper(p, res);
3523		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3524	}
3525	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3526	return status;
3527out_overflow:
3528	print_overflow_msg(__func__, xdr);
3529	return -EIO;
3530}
3531
3532static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3533{
3534	u32 n;
3535	__be32 *p;
3536	int status = 0;
3537
3538	p = xdr_inline_decode(xdr, 4);
3539	if (unlikely(!p))
3540		goto out_overflow;
3541	n = be32_to_cpup(p);
3542	if (n == 0)
3543		goto root_path;
3544	dprintk("pathname4: ");
3545	if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3546		dprintk("cannot parse %d components in path\n", n);
3547		goto out_eio;
3548	}
3549	for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3550		struct nfs4_string *component = &path->components[path->ncomponents];
3551		status = decode_opaque_inline(xdr, &component->len, &component->data);
3552		if (unlikely(status != 0))
3553			goto out_eio;
3554		ifdebug (XDR)
3555			pr_cont("%s%.*s ",
3556				(path->ncomponents != n ? "/ " : ""),
3557				component->len, component->data);
3558	}
3559out:
3560	return status;
3561root_path:
3562/* a root pathname is sent as a zero component4 */
3563	path->ncomponents = 1;
3564	path->components[0].len=0;
3565	path->components[0].data=NULL;
3566	dprintk("pathname4: /\n");
3567	goto out;
3568out_eio:
3569	dprintk(" status %d", status);
3570	status = -EIO;
3571	goto out;
3572out_overflow:
3573	print_overflow_msg(__func__, xdr);
3574	return -EIO;
3575}
3576
3577static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3578{
3579	int n;
3580	__be32 *p;
3581	int status = -EIO;
3582
3583	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3584		goto out;
3585	status = 0;
3586	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3587		goto out;
3588	status = -EIO;
3589	/* Ignore borken servers that return unrequested attrs */
3590	if (unlikely(res == NULL))
3591		goto out;
3592	dprintk("%s: fsroot:\n", __func__);
3593	status = decode_pathname(xdr, &res->fs_path);
3594	if (unlikely(status != 0))
3595		goto out;
3596	p = xdr_inline_decode(xdr, 4);
3597	if (unlikely(!p))
3598		goto out_overflow;
3599	n = be32_to_cpup(p);
3600	if (n <= 0)
3601		goto out_eio;
3602	for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3603		u32 m;
3604		struct nfs4_fs_location *loc;
3605
3606		if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3607			break;
3608		loc = &res->locations[res->nlocations];
3609		p = xdr_inline_decode(xdr, 4);
3610		if (unlikely(!p))
3611			goto out_overflow;
3612		m = be32_to_cpup(p);
3613
3614		dprintk("%s: servers:\n", __func__);
3615		for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3616			struct nfs4_string *server;
3617
3618			if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3619				unsigned int i;
3620				dprintk("%s: using first %u of %u servers "
3621					"returned for location %u\n",
3622						__func__,
3623						NFS4_FS_LOCATION_MAXSERVERS,
3624						m, res->nlocations);
3625				for (i = loc->nservers; i < m; i++) {
3626					unsigned int len;
3627					char *data;
3628					status = decode_opaque_inline(xdr, &len, &data);
3629					if (unlikely(status != 0))
3630						goto out_eio;
3631				}
3632				break;
3633			}
3634			server = &loc->servers[loc->nservers];
3635			status = decode_opaque_inline(xdr, &server->len, &server->data);
3636			if (unlikely(status != 0))
3637				goto out_eio;
3638			dprintk("%s ", server->data);
3639		}
3640		status = decode_pathname(xdr, &loc->rootpath);
3641		if (unlikely(status != 0))
3642			goto out_eio;
3643	}
3644	if (res->nlocations != 0)
3645		status = NFS_ATTR_FATTR_V4_LOCATIONS;
3646out:
3647	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3648	return status;
3649out_overflow:
3650	print_overflow_msg(__func__, xdr);
3651out_eio:
3652	status = -EIO;
3653	goto out;
3654}
3655
3656static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3657{
3658	__be32 *p;
3659	int status = 0;
3660
3661	*res = 0;
3662	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3663		return -EIO;
3664	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3665		p = xdr_inline_decode(xdr, 8);
3666		if (unlikely(!p))
3667			goto out_overflow;
3668		xdr_decode_hyper(p, res);
3669		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3670	}
3671	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3672	return status;
3673out_overflow:
3674	print_overflow_msg(__func__, xdr);
3675	return -EIO;
3676}
3677
3678static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3679{
3680	__be32 *p;
3681	int status = 0;
3682
3683	*maxlink = 1;
3684	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3685		return -EIO;
3686	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3687		p = xdr_inline_decode(xdr, 4);
3688		if (unlikely(!p))
3689			goto out_overflow;
3690		*maxlink = be32_to_cpup(p);
3691		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3692	}
3693	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3694	return status;
3695out_overflow:
3696	print_overflow_msg(__func__, xdr);
3697	return -EIO;
3698}
3699
3700static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3701{
3702	__be32 *p;
3703	int status = 0;
3704
3705	*maxname = 1024;
3706	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3707		return -EIO;
3708	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3709		p = xdr_inline_decode(xdr, 4);
3710		if (unlikely(!p))
3711			goto out_overflow;
3712		*maxname = be32_to_cpup(p);
3713		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3714	}
3715	dprintk("%s: maxname=%u\n", __func__, *maxname);
3716	return status;
3717out_overflow:
3718	print_overflow_msg(__func__, xdr);
3719	return -EIO;
3720}
3721
3722static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3723{
3724	__be32 *p;
3725	int status = 0;
3726
3727	*res = 1024;
3728	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3729		return -EIO;
3730	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3731		uint64_t maxread;
3732		p = xdr_inline_decode(xdr, 8);
3733		if (unlikely(!p))
3734			goto out_overflow;
3735		xdr_decode_hyper(p, &maxread);
3736		if (maxread > 0x7FFFFFFF)
3737			maxread = 0x7FFFFFFF;
3738		*res = (uint32_t)maxread;
3739		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3740	}
3741	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3742	return status;
3743out_overflow:
3744	print_overflow_msg(__func__, xdr);
3745	return -EIO;
3746}
3747
3748static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3749{
3750	__be32 *p;
3751	int status = 0;
3752
3753	*res = 1024;
3754	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3755		return -EIO;
3756	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3757		uint64_t maxwrite;
3758		p = xdr_inline_decode(xdr, 8);
3759		if (unlikely(!p))
3760			goto out_overflow;
3761		xdr_decode_hyper(p, &maxwrite);
3762		if (maxwrite > 0x7FFFFFFF)
3763			maxwrite = 0x7FFFFFFF;
3764		*res = (uint32_t)maxwrite;
3765		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3766	}
3767	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3768	return status;
3769out_overflow:
3770	print_overflow_msg(__func__, xdr);
3771	return -EIO;
3772}
3773
3774static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3775{
3776	uint32_t tmp;
3777	__be32 *p;
3778	int ret = 0;
3779
3780	*mode = 0;
3781	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3782		return -EIO;
3783	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3784		p = xdr_inline_decode(xdr, 4);
3785		if (unlikely(!p))
3786			goto out_overflow;
3787		tmp = be32_to_cpup(p);
3788		*mode = tmp & ~S_IFMT;
3789		bitmap[1] &= ~FATTR4_WORD1_MODE;
3790		ret = NFS_ATTR_FATTR_MODE;
3791	}
3792	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3793	return ret;
3794out_overflow:
3795	print_overflow_msg(__func__, xdr);
3796	return -EIO;
3797}
3798
3799static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3800{
3801	__be32 *p;
3802	int ret = 0;
3803
3804	*nlink = 1;
3805	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3806		return -EIO;
3807	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3808		p = xdr_inline_decode(xdr, 4);
3809		if (unlikely(!p))
3810			goto out_overflow;
3811		*nlink = be32_to_cpup(p);
3812		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3813		ret = NFS_ATTR_FATTR_NLINK;
3814	}
3815	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3816	return ret;
3817out_overflow:
3818	print_overflow_msg(__func__, xdr);
3819	return -EIO;
3820}
3821
3822static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3823		const struct nfs_server *server, kuid_t *uid,
3824		struct nfs4_string *owner_name)
3825{
3826	uint32_t len;
3827	__be32 *p;
3828	int ret = 0;
3829
3830	*uid = make_kuid(&init_user_ns, -2);
3831	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3832		return -EIO;
3833	if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3834		p = xdr_inline_decode(xdr, 4);
3835		if (unlikely(!p))
3836			goto out_overflow;
3837		len = be32_to_cpup(p);
3838		p = xdr_inline_decode(xdr, len);
3839		if (unlikely(!p))
3840			goto out_overflow;
3841		if (owner_name != NULL) {
3842			owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3843			if (owner_name->data != NULL) {
3844				owner_name->len = len;
3845				ret = NFS_ATTR_FATTR_OWNER_NAME;
3846			}
3847		} else if (len < XDR_MAX_NETOBJ) {
3848			if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3849				ret = NFS_ATTR_FATTR_OWNER;
3850			else
3851				dprintk("%s: nfs_map_name_to_uid failed!\n",
3852						__func__);
3853		} else
3854			dprintk("%s: name too long (%u)!\n",
3855					__func__, len);
3856		bitmap[1] &= ~FATTR4_WORD1_OWNER;
3857	}
3858	dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3859	return ret;
3860out_overflow:
3861	print_overflow_msg(__func__, xdr);
3862	return -EIO;
3863}
3864
3865static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3866		const struct nfs_server *server, kgid_t *gid,
3867		struct nfs4_string *group_name)
3868{
3869	uint32_t len;
3870	__be32 *p;
3871	int ret = 0;
3872
3873	*gid = make_kgid(&init_user_ns, -2);
3874	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3875		return -EIO;
3876	if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3877		p = xdr_inline_decode(xdr, 4);
3878		if (unlikely(!p))
3879			goto out_overflow;
3880		len = be32_to_cpup(p);
3881		p = xdr_inline_decode(xdr, len);
3882		if (unlikely(!p))
3883			goto out_overflow;
3884		if (group_name != NULL) {
3885			group_name->data = kmemdup(p, len, GFP_NOWAIT);
3886			if (group_name->data != NULL) {
3887				group_name->len = len;
3888				ret = NFS_ATTR_FATTR_GROUP_NAME;
3889			}
3890		} else if (len < XDR_MAX_NETOBJ) {
3891			if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3892				ret = NFS_ATTR_FATTR_GROUP;
3893			else
3894				dprintk("%s: nfs_map_group_to_gid failed!\n",
3895						__func__);
3896		} else
3897			dprintk("%s: name too long (%u)!\n",
3898					__func__, len);
3899		bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3900	}
3901	dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3902	return ret;
3903out_overflow:
3904	print_overflow_msg(__func__, xdr);
3905	return -EIO;
3906}
3907
3908static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3909{
3910	uint32_t major = 0, minor = 0;
3911	__be32 *p;
3912	int ret = 0;
3913
3914	*rdev = MKDEV(0,0);
3915	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3916		return -EIO;
3917	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3918		dev_t tmp;
3919
3920		p = xdr_inline_decode(xdr, 8);
3921		if (unlikely(!p))
3922			goto out_overflow;
3923		major = be32_to_cpup(p++);
3924		minor = be32_to_cpup(p);
3925		tmp = MKDEV(major, minor);
3926		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3927			*rdev = tmp;
3928		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3929		ret = NFS_ATTR_FATTR_RDEV;
3930	}
3931	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3932	return ret;
3933out_overflow:
3934	print_overflow_msg(__func__, xdr);
3935	return -EIO;
3936}
3937
3938static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3939{
3940	__be32 *p;
3941	int status = 0;
3942
3943	*res = 0;
3944	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3945		return -EIO;
3946	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3947		p = xdr_inline_decode(xdr, 8);
3948		if (unlikely(!p))
3949			goto out_overflow;
3950		xdr_decode_hyper(p, res);
3951		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3952	}
3953	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3954	return status;
3955out_overflow:
3956	print_overflow_msg(__func__, xdr);
3957	return -EIO;
3958}
3959
3960static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3961{
3962	__be32 *p;
3963	int status = 0;
3964
3965	*res = 0;
3966	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3967		return -EIO;
3968	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3969		p = xdr_inline_decode(xdr, 8);
3970		if (unlikely(!p))
3971			goto out_overflow;
3972		xdr_decode_hyper(p, res);
3973		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3974	}
3975	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3976	return status;
3977out_overflow:
3978	print_overflow_msg(__func__, xdr);
3979	return -EIO;
3980}
3981
3982static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3983{
3984	__be32 *p;
3985	int status = 0;
3986
3987	*res = 0;
3988	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3989		return -EIO;
3990	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3991		p = xdr_inline_decode(xdr, 8);
3992		if (unlikely(!p))
3993			goto out_overflow;
3994		xdr_decode_hyper(p, res);
3995		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3996	}
3997	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3998	return status;
3999out_overflow:
4000	print_overflow_msg(__func__, xdr);
4001	return -EIO;
4002}
4003
4004static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4005{
4006	__be32 *p;
4007	int ret = 0;
4008
4009	*used = 0;
4010	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4011		return -EIO;
4012	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4013		p = xdr_inline_decode(xdr, 8);
4014		if (unlikely(!p))
4015			goto out_overflow;
4016		xdr_decode_hyper(p, used);
4017		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4018		ret = NFS_ATTR_FATTR_SPACE_USED;
4019	}
4020	dprintk("%s: space used=%Lu\n", __func__,
4021			(unsigned long long)*used);
4022	return ret;
4023out_overflow:
4024	print_overflow_msg(__func__, xdr);
4025	return -EIO;
4026}
4027
4028static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4029{
4030	__be32 *p;
4031	uint64_t sec;
4032	uint32_t nsec;
4033
4034	p = xdr_inline_decode(xdr, 12);
4035	if (unlikely(!p))
4036		goto out_overflow;
4037	p = xdr_decode_hyper(p, &sec);
4038	nsec = be32_to_cpup(p);
4039	time->tv_sec = (time_t)sec;
4040	time->tv_nsec = (long)nsec;
4041	return 0;
4042out_overflow:
4043	print_overflow_msg(__func__, xdr);
4044	return -EIO;
4045}
4046
4047static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4048{
4049	int status = 0;
4050
4051	time->tv_sec = 0;
4052	time->tv_nsec = 0;
4053	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4054		return -EIO;
4055	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4056		status = decode_attr_time(xdr, time);
4057		if (status == 0)
4058			status = NFS_ATTR_FATTR_ATIME;
4059		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4060	}
4061	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4062	return status;
4063}
4064
4065static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4066{
4067	int status = 0;
4068
4069	time->tv_sec = 0;
4070	time->tv_nsec = 0;
4071	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4072		return -EIO;
4073	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4074		status = decode_attr_time(xdr, time);
4075		if (status == 0)
4076			status = NFS_ATTR_FATTR_CTIME;
4077		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4078	}
4079	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4080	return status;
4081}
4082
4083static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4084				  struct timespec *time)
4085{
4086	int status = 0;
4087
4088	time->tv_sec = 0;
4089	time->tv_nsec = 0;
4090	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4091		return -EIO;
4092	if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4093		status = decode_attr_time(xdr, time);
4094		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4095	}
4096	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4097		(long)time->tv_nsec);
4098	return status;
4099}
4100
4101static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4102					struct nfs4_label *label)
4103{
4104	uint32_t pi = 0;
4105	uint32_t lfs = 0;
4106	__u32 len;
4107	__be32 *p;
4108	int status = 0;
4109
4110	if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4111		return -EIO;
4112	if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4113		p = xdr_inline_decode(xdr, 4);
4114		if (unlikely(!p))
4115			goto out_overflow;
4116		lfs = be32_to_cpup(p++);
4117		p = xdr_inline_decode(xdr, 4);
4118		if (unlikely(!p))
4119			goto out_overflow;
4120		pi = be32_to_cpup(p++);
4121		p = xdr_inline_decode(xdr, 4);
4122		if (unlikely(!p))
4123			goto out_overflow;
4124		len = be32_to_cpup(p++);
4125		p = xdr_inline_decode(xdr, len);
4126		if (unlikely(!p))
4127			goto out_overflow;
4128		if (len < NFS4_MAXLABELLEN) {
4129			if (label) {
4130				memcpy(label->label, p, len);
4131				label->len = len;
4132				label->pi = pi;
4133				label->lfs = lfs;
4134				status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4135			}
4136			bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4137		} else
4138			printk(KERN_WARNING "%s: label too long (%u)!\n",
4139					__func__, len);
4140	}
4141	if (label && label->label)
4142		dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4143			(char *)label->label, label->len, label->pi, label->lfs);
4144	return status;
4145
4146out_overflow:
4147	print_overflow_msg(__func__, xdr);
4148	return -EIO;
4149}
4150
4151static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4152{
4153	int status = 0;
4154
4155	time->tv_sec = 0;
4156	time->tv_nsec = 0;
4157	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4158		return -EIO;
4159	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4160		status = decode_attr_time(xdr, time);
4161		if (status == 0)
4162			status = NFS_ATTR_FATTR_MTIME;
4163		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4164	}
4165	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4166	return status;
4167}
4168
4169static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4170{
4171	unsigned int attrwords = XDR_QUADLEN(attrlen);
4172	unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4173
4174	if (unlikely(attrwords != nwords)) {
4175		dprintk("%s: server returned incorrect attribute length: "
4176			"%u %c %u\n",
4177				__func__,
4178				attrwords << 2,
4179				(attrwords < nwords) ? '<' : '>',
4180				nwords << 2);
4181		return -EIO;
4182	}
4183	return 0;
4184}
4185
4186static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4187{
4188	__be32 *p;
4189
4190	p = xdr_inline_decode(xdr, 20);
4191	if (unlikely(!p))
4192		goto out_overflow;
4193	cinfo->atomic = be32_to_cpup(p++);
4194	p = xdr_decode_hyper(p, &cinfo->before);
4195	xdr_decode_hyper(p, &cinfo->after);
4196	return 0;
4197out_overflow:
4198	print_overflow_msg(__func__, xdr);
4199	return -EIO;
4200}
4201
4202static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4203{
4204	__be32 *p;
4205	uint32_t supp, acc;
4206	int status;
4207
4208	status = decode_op_hdr(xdr, OP_ACCESS);
4209	if (status)
4210		return status;
4211	p = xdr_inline_decode(xdr, 8);
4212	if (unlikely(!p))
4213		goto out_overflow;
4214	supp = be32_to_cpup(p++);
4215	acc = be32_to_cpup(p);
4216	*supported = supp;
4217	*access = acc;
4218	return 0;
4219out_overflow:
4220	print_overflow_msg(__func__, xdr);
4221	return -EIO;
4222}
4223
4224static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4225{
4226	__be32 *p;
4227
4228	p = xdr_inline_decode(xdr, len);
4229	if (likely(p)) {
4230		memcpy(buf, p, len);
4231		return 0;
4232	}
4233	print_overflow_msg(__func__, xdr);
4234	return -EIO;
4235}
4236
4237static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4238{
4239	return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4240}
4241
4242static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4243{
4244	int status;
4245
4246	status = decode_op_hdr(xdr, OP_CLOSE);
4247	if (status != -EIO)
4248		nfs_increment_open_seqid(status, res->seqid);
4249	if (!status)
4250		status = decode_stateid(xdr, &res->stateid);
4251	return status;
4252}
4253
4254static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4255{
4256	return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4257}
4258
4259static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4260{
4261	return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4262}
4263
4264static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4265{
4266	int status;
4267
4268	status = decode_op_hdr(xdr, OP_COMMIT);
4269	if (!status)
4270		status = decode_write_verifier(xdr, &res->verf->verifier);
4271	return status;
4272}
4273
4274static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4275{
4276	__be32 *p;
4277	uint32_t bmlen;
4278	int status;
4279
4280	status = decode_op_hdr(xdr, OP_CREATE);
4281	if (status)
4282		return status;
4283	if ((status = decode_change_info(xdr, cinfo)))
4284		return status;
4285	p = xdr_inline_decode(xdr, 4);
4286	if (unlikely(!p))
4287		goto out_overflow;
4288	bmlen = be32_to_cpup(p);
4289	p = xdr_inline_decode(xdr, bmlen << 2);
4290	if (likely(p))
4291		return 0;
4292out_overflow:
4293	print_overflow_msg(__func__, xdr);
4294	return -EIO;
4295}
4296
4297static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4298{
4299	unsigned int savep;
4300	uint32_t attrlen, bitmap[3] = {0};
4301	int status;
4302
4303	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4304		goto xdr_error;
4305	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4306		goto xdr_error;
4307	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4308		goto xdr_error;
4309	if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4310		goto xdr_error;
4311	if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4312						 &res->fh_expire_type)) != 0)
4313		goto xdr_error;
4314	if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4315		goto xdr_error;
4316	if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4317		goto xdr_error;
4318	if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4319		goto xdr_error;
4320	status = verify_attr_len(xdr, savep, attrlen);
4321xdr_error:
4322	dprintk("%s: xdr returned %d!\n", __func__, -status);
4323	return status;
4324}
4325
4326static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4327{
4328	unsigned int savep;
4329	uint32_t attrlen, bitmap[3] = {0};
4330	int status;
4331
4332	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4333		goto xdr_error;
4334	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4335		goto xdr_error;
4336	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4337		goto xdr_error;
4338
4339	if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4340		goto xdr_error;
4341	if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4342		goto xdr_error;
4343	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4344		goto xdr_error;
4345	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4346		goto xdr_error;
4347	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4348		goto xdr_error;
4349	if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4350		goto xdr_error;
4351
4352	status = verify_attr_len(xdr, savep, attrlen);
4353xdr_error:
4354	dprintk("%s: xdr returned %d!\n", __func__, -status);
4355	return status;
4356}
4357
4358static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4359{
4360	unsigned int savep;
4361	uint32_t attrlen, bitmap[3] = {0};
4362	int status;
4363
4364	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4365		goto xdr_error;
4366	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4367		goto xdr_error;
4368	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4369		goto xdr_error;
4370
4371	if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4372		goto xdr_error;
4373	if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4374		goto xdr_error;
4375
4376	status = verify_attr_len(xdr, savep, attrlen);
4377xdr_error:
4378	dprintk("%s: xdr returned %d!\n", __func__, -status);
4379	return status;
4380}
4381
4382static int decode_threshold_hint(struct xdr_stream *xdr,
4383				  uint32_t *bitmap,
4384				  uint64_t *res,
4385				  uint32_t hint_bit)
4386{
4387	__be32 *p;
4388
4389	*res = 0;
4390	if (likely(bitmap[0] & hint_bit)) {
4391		p = xdr_inline_decode(xdr, 8);
4392		if (unlikely(!p))
4393			goto out_overflow;
4394		xdr_decode_hyper(p, res);
4395	}
4396	return 0;
4397out_overflow:
4398	print_overflow_msg(__func__, xdr);
4399	return -EIO;
4400}
4401
4402static int decode_first_threshold_item4(struct xdr_stream *xdr,
4403					struct nfs4_threshold *res)
4404{
4405	__be32 *p;
4406	unsigned int savep;
4407	uint32_t bitmap[3] = {0,}, attrlen;
4408	int status;
4409
4410	/* layout type */
4411	p = xdr_inline_decode(xdr, 4);
4412	if (unlikely(!p)) {
4413		print_overflow_msg(__func__, xdr);
4414		return -EIO;
4415	}
4416	res->l_type = be32_to_cpup(p);
4417
4418	/* thi_hintset bitmap */
4419	status = decode_attr_bitmap(xdr, bitmap);
4420	if (status < 0)
4421		goto xdr_error;
4422
4423	/* thi_hintlist length */
4424	status = decode_attr_length(xdr, &attrlen, &savep);
4425	if (status < 0)
4426		goto xdr_error;
4427	/* thi_hintlist */
4428	status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4429	if (status < 0)
4430		goto xdr_error;
4431	status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4432	if (status < 0)
4433		goto xdr_error;
4434	status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4435				       THRESHOLD_RD_IO);
4436	if (status < 0)
4437		goto xdr_error;
4438	status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4439				       THRESHOLD_WR_IO);
4440	if (status < 0)
4441		goto xdr_error;
4442
4443	status = verify_attr_len(xdr, savep, attrlen);
4444	res->bm = bitmap[0];
4445
4446	dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4447		 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4448		res->wr_io_sz);
4449xdr_error:
4450	dprintk("%s ret=%d!\n", __func__, status);
4451	return status;
4452}
4453
4454/*
4455 * Thresholds on pNFS direct I/O vrs MDS I/O
4456 */
4457static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4458				    uint32_t *bitmap,
4459				    struct nfs4_threshold *res)
4460{
4461	__be32 *p;
4462	int status = 0;
4463	uint32_t num;
4464
4465	if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4466		return -EIO;
4467	if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4468		/* Did the server return an unrequested attribute? */
4469		if (unlikely(res == NULL))
4470			return -EREMOTEIO;
4471		p = xdr_inline_decode(xdr, 4);
4472		if (unlikely(!p))
4473			goto out_overflow;
4474		num = be32_to_cpup(p);
4475		if (num == 0)
4476			return 0;
4477		if (num > 1)
4478			printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4479				"drivers per filesystem not supported\n",
4480				__func__);
4481
4482		status = decode_first_threshold_item4(xdr, res);
4483		bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4484	}
4485	return status;
4486out_overflow:
4487	print_overflow_msg(__func__, xdr);
4488	return -EIO;
4489}
4490
4491static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4492		struct nfs_fattr *fattr, struct nfs_fh *fh,
4493		struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4494		const struct nfs_server *server)
4495{
4496	int status;
4497	umode_t fmode = 0;
4498	uint32_t type;
4499	int32_t err;
4500
4501	status = decode_attr_type(xdr, bitmap, &type);
4502	if (status < 0)
4503		goto xdr_error;
4504	fattr->mode = 0;
4505	if (status != 0) {
4506		fattr->mode |= nfs_type2fmt[type];
4507		fattr->valid |= status;
4508	}
4509
4510	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4511	if (status < 0)
4512		goto xdr_error;
4513	fattr->valid |= status;
4514
4515	status = decode_attr_size(xdr, bitmap, &fattr->size);
4516	if (status < 0)
4517		goto xdr_error;
4518	fattr->valid |= status;
4519
4520	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4521	if (status < 0)
4522		goto xdr_error;
4523	fattr->valid |= status;
4524
4525	err = 0;
4526	status = decode_attr_error(xdr, bitmap, &err);
4527	if (status < 0)
4528		goto xdr_error;
4529
4530	status = decode_attr_filehandle(xdr, bitmap, fh);
4531	if (status < 0)
4532		goto xdr_error;
4533
4534	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4535	if (status < 0)
4536		goto xdr_error;
4537	fattr->valid |= status;
4538
4539	status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4540	if (status < 0)
4541		goto xdr_error;
4542	fattr->valid |= status;
4543
4544	status = decode_attr_mode(xdr, bitmap, &fmode);
4545	if (status < 0)
4546		goto xdr_error;
4547	if (status != 0) {
4548		fattr->mode |= fmode;
4549		fattr->valid |= status;
4550	}
4551
4552	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4553	if (status < 0)
4554		goto xdr_error;
4555	fattr->valid |= status;
4556
4557	status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4558	if (status < 0)
4559		goto xdr_error;
4560	fattr->valid |= status;
4561
4562	status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4563	if (status < 0)
4564		goto xdr_error;
4565	fattr->valid |= status;
4566
4567	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4568	if (status < 0)
4569		goto xdr_error;
4570	fattr->valid |= status;
4571
4572	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4573	if (status < 0)
4574		goto xdr_error;
4575	fattr->valid |= status;
4576
4577	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4578	if (status < 0)
4579		goto xdr_error;
4580	fattr->valid |= status;
4581
4582	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4583	if (status < 0)
4584		goto xdr_error;
4585	fattr->valid |= status;
4586
4587	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4588	if (status < 0)
4589		goto xdr_error;
4590	fattr->valid |= status;
4591
4592	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4593	if (status < 0)
4594		goto xdr_error;
4595	fattr->valid |= status;
4596
4597	status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4598	if (status < 0)
4599		goto xdr_error;
4600
4601	if (label) {
4602		status = decode_attr_security_label(xdr, bitmap, label);
4603		if (status < 0)
4604			goto xdr_error;
4605		fattr->valid |= status;
4606	}
4607
4608xdr_error:
4609	dprintk("%s: xdr returned %d\n", __func__, -status);
4610	return status;
4611}
4612
4613static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4614		struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4615		struct nfs4_label *label, const struct nfs_server *server)
4616{
4617	unsigned int savep;
4618	uint32_t attrlen,
4619		 bitmap[3] = {0};
4620	int status;
4621
4622	status = decode_op_hdr(xdr, OP_GETATTR);
4623	if (status < 0)
4624		goto xdr_error;
4625
4626	status = decode_attr_bitmap(xdr, bitmap);
4627	if (status < 0)
4628		goto xdr_error;
4629
4630	status = decode_attr_length(xdr, &attrlen, &savep);
4631	if (status < 0)
4632		goto xdr_error;
4633
4634	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4635					label, server);
4636	if (status < 0)
4637		goto xdr_error;
4638
4639	status = verify_attr_len(xdr, savep, attrlen);
4640xdr_error:
4641	dprintk("%s: xdr returned %d\n", __func__, -status);
4642	return status;
4643}
4644
4645static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4646		struct nfs4_label *label, const struct nfs_server *server)
4647{
4648	return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4649}
4650
4651static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4652		const struct nfs_server *server)
4653{
4654	return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4655}
4656
4657/*
4658 * Decode potentially multiple layout types. Currently we only support
4659 * one layout driver per file system.
4660 */
4661static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4662					 uint32_t *layouttype)
4663{
4664	__be32 *p;
4665	int num;
4666
4667	p = xdr_inline_decode(xdr, 4);
4668	if (unlikely(!p))
4669		goto out_overflow;
4670	num = be32_to_cpup(p);
4671
4672	/* pNFS is not supported by the underlying file system */
4673	if (num == 0) {
4674		*layouttype = 0;
4675		return 0;
4676	}
4677	if (num > 1)
4678		printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4679			"drivers per filesystem not supported\n", __func__);
4680
4681	/* Decode and set first layout type, move xdr->p past unused types */
4682	p = xdr_inline_decode(xdr, num * 4);
4683	if (unlikely(!p))
4684		goto out_overflow;
4685	*layouttype = be32_to_cpup(p);
4686	return 0;
4687out_overflow:
4688	print_overflow_msg(__func__, xdr);
4689	return -EIO;
4690}
4691
4692/*
4693 * The type of file system exported.
4694 * Note we must ensure that layouttype is set in any non-error case.
4695 */
4696static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4697				uint32_t *layouttype)
4698{
4699	int status = 0;
4700
4701	dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4702	if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4703		return -EIO;
4704	if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4705		status = decode_first_pnfs_layout_type(xdr, layouttype);
4706		bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4707	} else
4708		*layouttype = 0;
4709	return status;
4710}
4711
4712/*
4713 * The prefered block size for layout directed io
4714 */
4715static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4716				      uint32_t *res)
4717{
4718	__be32 *p;
4719
4720	dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4721	*res = 0;
4722	if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4723		p = xdr_inline_decode(xdr, 4);
4724		if (unlikely(!p)) {
4725			print_overflow_msg(__func__, xdr);
4726			return -EIO;
4727		}
4728		*res = be32_to_cpup(p);
4729		bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4730	}
4731	return 0;
4732}
4733
4734static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4735{
4736	unsigned int savep;
4737	uint32_t attrlen, bitmap[3];
4738	int status;
4739
4740	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4741		goto xdr_error;
4742	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4743		goto xdr_error;
4744	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4745		goto xdr_error;
4746
4747	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */
4748
4749	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4750		goto xdr_error;
4751	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4752		goto xdr_error;
4753	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4754		goto xdr_error;
4755	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4756	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4757		goto xdr_error;
4758	fsinfo->wtpref = fsinfo->wtmax;
4759	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4760	if (status != 0)
4761		goto xdr_error;
4762	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4763	if (status != 0)
4764		goto xdr_error;
4765	status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4766	if (status)
4767		goto xdr_error;
4768
4769	status = verify_attr_len(xdr, savep, attrlen);
4770xdr_error:
4771	dprintk("%s: xdr returned %d!\n", __func__, -status);
4772	return status;
4773}
4774
4775static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4776{
4777	__be32 *p;
4778	uint32_t len;
4779	int status;
4780
4781	/* Zero handle first to allow comparisons */
4782	memset(fh, 0, sizeof(*fh));
4783
4784	status = decode_op_hdr(xdr, OP_GETFH);
4785	if (status)
4786		return status;
4787
4788	p = xdr_inline_decode(xdr, 4);
4789	if (unlikely(!p))
4790		goto out_overflow;
4791	len = be32_to_cpup(p);
4792	if (len > NFS4_FHSIZE)
4793		return -EIO;
4794	fh->size = len;
4795	p = xdr_inline_decode(xdr, len);
4796	if (unlikely(!p))
4797		goto out_overflow;
4798	memcpy(fh->data, p, len);
4799	return 0;
4800out_overflow:
4801	print_overflow_msg(__func__, xdr);
4802	return -EIO;
4803}
4804
4805static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4806{
4807	int status;
4808
4809	status = decode_op_hdr(xdr, OP_LINK);
4810	if (status)
4811		return status;
4812	return decode_change_info(xdr, cinfo);
4813}
4814
4815/*
4816 * We create the owner, so we know a proper owner.id length is 4.
4817 */
4818static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4819{
4820	uint64_t offset, length, clientid;
4821	__be32 *p;
4822	uint32_t namelen, type;
4823
4824	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4825	if (unlikely(!p))
4826		goto out_overflow;
4827	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4828	p = xdr_decode_hyper(p, &length);
4829	type = be32_to_cpup(p++); /* 4 byte read */
4830	if (fl != NULL) { /* manipulate file lock */
4831		fl->fl_start = (loff_t)offset;
4832		fl->fl_end = fl->fl_start + (loff_t)length - 1;
4833		if (length == ~(uint64_t)0)
4834			fl->fl_end = OFFSET_MAX;
4835		fl->fl_type = F_WRLCK;
4836		if (type & 1)
4837			fl->fl_type = F_RDLCK;
4838		fl->fl_pid = 0;
4839	}
4840	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4841	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4842	p = xdr_inline_decode(xdr, namelen); /* variable size field */
4843	if (likely(p))
4844		return -NFS4ERR_DENIED;
4845out_overflow:
4846	print_overflow_msg(__func__, xdr);
4847	return -EIO;
4848}
4849
4850static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4851{
4852	int status;
4853
4854	status = decode_op_hdr(xdr, OP_LOCK);
4855	if (status == -EIO)
4856		goto out;
4857	if (status == 0) {
4858		status = decode_stateid(xdr, &res->stateid);
4859		if (unlikely(status))
4860			goto out;
4861	} else if (status == -NFS4ERR_DENIED)
4862		status = decode_lock_denied(xdr, NULL);
4863	if (res->open_seqid != NULL)
4864		nfs_increment_open_seqid(status, res->open_seqid);
4865	nfs_increment_lock_seqid(status, res->lock_seqid);
4866out:
4867	return status;
4868}
4869
4870static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4871{
4872	int status;
4873	status = decode_op_hdr(xdr, OP_LOCKT);
4874	if (status == -NFS4ERR_DENIED)
4875		return decode_lock_denied(xdr, res->denied);
4876	return status;
4877}
4878
4879static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4880{
4881	int status;
4882
4883	status = decode_op_hdr(xdr, OP_LOCKU);
4884	if (status != -EIO)
4885		nfs_increment_lock_seqid(status, res->seqid);
4886	if (status == 0)
4887		status = decode_stateid(xdr, &res->stateid);
4888	return status;
4889}
4890
4891static int decode_release_lockowner(struct xdr_stream *xdr)
4892{
4893	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4894}
4895
4896static int decode_lookup(struct xdr_stream *xdr)
4897{
4898	return decode_op_hdr(xdr, OP_LOOKUP);
4899}
4900
4901/* This is too sick! */
4902static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4903{
4904	__be32 *p;
4905	uint32_t limit_type, nblocks, blocksize;
4906
4907	p = xdr_inline_decode(xdr, 12);
4908	if (unlikely(!p))
4909		goto out_overflow;
4910	limit_type = be32_to_cpup(p++);
4911	switch (limit_type) {
4912	case 1:
4913		xdr_decode_hyper(p, maxsize);
4914		break;
4915	case 2:
4916		nblocks = be32_to_cpup(p++);
4917		blocksize = be32_to_cpup(p);
4918		*maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4919	}
4920	return 0;
4921out_overflow:
4922	print_overflow_msg(__func__, xdr);
4923	return -EIO;
4924}
4925
4926static int decode_rw_delegation(struct xdr_stream *xdr,
4927		uint32_t delegation_type,
4928		struct nfs_openres *res)
4929{
4930	__be32 *p;
4931	int status;
4932
4933	status = decode_stateid(xdr, &res->delegation);
4934	if (unlikely(status))
4935		return status;
4936	p = xdr_inline_decode(xdr, 4);
4937	if (unlikely(!p))
4938		goto out_overflow;
4939	res->do_recall = be32_to_cpup(p);
4940
4941	switch (delegation_type) {
4942	case NFS4_OPEN_DELEGATE_READ:
4943		res->delegation_type = FMODE_READ;
4944		break;
4945	case NFS4_OPEN_DELEGATE_WRITE:
4946		res->delegation_type = FMODE_WRITE|FMODE_READ;
4947		if (decode_space_limit(xdr, &res->maxsize) < 0)
4948				return -EIO;
4949	}
4950	return decode_ace(xdr, NULL, res->server->nfs_client);
4951out_overflow:
4952	print_overflow_msg(__func__, xdr);
4953	return -EIO;
4954}
4955
4956static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4957{
4958	__be32 *p;
4959	uint32_t why_no_delegation;
4960
4961	p = xdr_inline_decode(xdr, 4);
4962	if (unlikely(!p))
4963		goto out_overflow;
4964	why_no_delegation = be32_to_cpup(p);
4965	switch (why_no_delegation) {
4966		case WND4_CONTENTION:
4967		case WND4_RESOURCE:
4968			xdr_inline_decode(xdr, 4);
4969			/* Ignore for now */
4970	}
4971	return 0;
4972out_overflow:
4973	print_overflow_msg(__func__, xdr);
4974	return -EIO;
4975}
4976
4977static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4978{
4979	__be32 *p;
4980	uint32_t delegation_type;
4981
4982	p = xdr_inline_decode(xdr, 4);
4983	if (unlikely(!p))
4984		goto out_overflow;
4985	delegation_type = be32_to_cpup(p);
4986	res->delegation_type = 0;
4987	switch (delegation_type) {
4988	case NFS4_OPEN_DELEGATE_NONE:
4989		return 0;
4990	case NFS4_OPEN_DELEGATE_READ:
4991	case NFS4_OPEN_DELEGATE_WRITE:
4992		return decode_rw_delegation(xdr, delegation_type, res);
4993	case NFS4_OPEN_DELEGATE_NONE_EXT:
4994		return decode_no_delegation(xdr, res);
4995	}
4996	return -EIO;
4997out_overflow:
4998	print_overflow_msg(__func__, xdr);
4999	return -EIO;
5000}
5001
5002static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5003{
5004	__be32 *p;
5005	uint32_t savewords, bmlen, i;
5006	int status;
5007
5008	if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5009		return status;
5010	nfs_increment_open_seqid(status, res->seqid);
5011	if (status)
5012		return status;
5013	status = decode_stateid(xdr, &res->stateid);
5014	if (unlikely(status))
5015		return status;
5016
5017	decode_change_info(xdr, &res->cinfo);
5018
5019	p = xdr_inline_decode(xdr, 8);
5020	if (unlikely(!p))
5021		goto out_overflow;
5022	res->rflags = be32_to_cpup(p++);
5023	bmlen = be32_to_cpup(p);
5024	if (bmlen > 10)
5025		goto xdr_error;
5026
5027	p = xdr_inline_decode(xdr, bmlen << 2);
5028	if (unlikely(!p))
5029		goto out_overflow;
5030	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5031	for (i = 0; i < savewords; ++i)
5032		res->attrset[i] = be32_to_cpup(p++);
5033	for (; i < NFS4_BITMAP_SIZE; i++)
5034		res->attrset[i] = 0;
5035
5036	return decode_delegation(xdr, res);
5037xdr_error:
5038	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5039	return -EIO;
5040out_overflow:
5041	print_overflow_msg(__func__, xdr);
5042	return -EIO;
5043}
5044
5045static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5046{
5047	int status;
5048
5049	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5050	if (status != -EIO)
5051		nfs_increment_open_seqid(status, res->seqid);
5052	if (!status)
5053		status = decode_stateid(xdr, &res->stateid);
5054	return status;
5055}
5056
5057static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5058{
5059	int status;
5060
5061	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5062	if (status != -EIO)
5063		nfs_increment_open_seqid(status, res->seqid);
5064	if (!status)
5065		status = decode_stateid(xdr, &res->stateid);
5066	return status;
5067}
5068
5069static int decode_putfh(struct xdr_stream *xdr)
5070{
5071	return decode_op_hdr(xdr, OP_PUTFH);
5072}
5073
5074static int decode_putrootfh(struct xdr_stream *xdr)
5075{
5076	return decode_op_hdr(xdr, OP_PUTROOTFH);
5077}
5078
5079static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5080		       struct nfs_pgio_res *res)
5081{
5082	__be32 *p;
5083	uint32_t count, eof, recvd;
5084	int status;
5085
5086	status = decode_op_hdr(xdr, OP_READ);
5087	if (status)
5088		return status;
5089	p = xdr_inline_decode(xdr, 8);
5090	if (unlikely(!p))
5091		goto out_overflow;
5092	eof = be32_to_cpup(p++);
5093	count = be32_to_cpup(p);
5094	recvd = xdr_read_pages(xdr, count);
5095	if (count > recvd) {
5096		dprintk("NFS: server cheating in read reply: "
5097				"count %u > recvd %u\n", count, recvd);
5098		count = recvd;
5099		eof = 0;
5100	}
5101	res->eof = eof;
5102	res->count = count;
5103	return 0;
5104out_overflow:
5105	print_overflow_msg(__func__, xdr);
5106	return -EIO;
5107}
5108
5109static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5110{
5111	int		status;
5112	__be32		verf[2];
5113
5114	status = decode_op_hdr(xdr, OP_READDIR);
5115	if (!status)
5116		status = decode_verifier(xdr, readdir->verifier.data);
5117	if (unlikely(status))
5118		return status;
5119	memcpy(verf, readdir->verifier.data, sizeof(verf));
5120	dprintk("%s: verifier = %08x:%08x\n",
5121			__func__, verf[0], verf[1]);
5122	return xdr_read_pages(xdr, xdr->buf->page_len);
5123}
5124
5125static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5126{
5127	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5128	u32 len, recvd;
5129	__be32 *p;
5130	int status;
5131
5132	status = decode_op_hdr(xdr, OP_READLINK);
5133	if (status)
5134		return status;
5135
5136	/* Convert length of symlink */
5137	p = xdr_inline_decode(xdr, 4);
5138	if (unlikely(!p))
5139		goto out_overflow;
5140	len = be32_to_cpup(p);
5141	if (len >= rcvbuf->page_len || len <= 0) {
5142		dprintk("nfs: server returned giant symlink!\n");
5143		return -ENAMETOOLONG;
5144	}
5145	recvd = xdr_read_pages(xdr, len);
5146	if (recvd < len) {
5147		dprintk("NFS: server cheating in readlink reply: "
5148				"count %u > recvd %u\n", len, recvd);
5149		return -EIO;
5150	}
5151	/*
5152	 * The XDR encode routine has set things up so that
5153	 * the link text will be copied directly into the
5154	 * buffer.  We just have to do overflow-checking,
5155	 * and and null-terminate the text (the VFS expects
5156	 * null-termination).
5157	 */
5158	xdr_terminate_string(rcvbuf, len);
5159	return 0;
5160out_overflow:
5161	print_overflow_msg(__func__, xdr);
5162	return -EIO;
5163}
5164
5165static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5166{
5167	int status;
5168
5169	status = decode_op_hdr(xdr, OP_REMOVE);
5170	if (status)
5171		goto out;
5172	status = decode_change_info(xdr, cinfo);
5173out:
5174	return status;
5175}
5176
5177static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5178	      struct nfs4_change_info *new_cinfo)
5179{
5180	int status;
5181
5182	status = decode_op_hdr(xdr, OP_RENAME);
5183	if (status)
5184		goto out;
5185	if ((status = decode_change_info(xdr, old_cinfo)))
5186		goto out;
5187	status = decode_change_info(xdr, new_cinfo);
5188out:
5189	return status;
5190}
5191
5192static int decode_renew(struct xdr_stream *xdr)
5193{
5194	return decode_op_hdr(xdr, OP_RENEW);
5195}
5196
5197static int
5198decode_restorefh(struct xdr_stream *xdr)
5199{
5200	return decode_op_hdr(xdr, OP_RESTOREFH);
5201}
5202
5203static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5204			 struct nfs_getaclres *res)
5205{
5206	unsigned int savep;
5207	uint32_t attrlen,
5208		 bitmap[3] = {0};
5209	int status;
5210	unsigned int pg_offset;
5211
5212	res->acl_len = 0;
5213	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5214		goto out;
5215
5216	xdr_enter_page(xdr, xdr->buf->page_len);
5217
5218	/* Calculate the offset of the page data */
5219	pg_offset = xdr->buf->head[0].iov_len;
5220
5221	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5222		goto out;
5223	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5224		goto out;
5225
5226	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5227		return -EIO;
5228	if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5229
5230		/* The bitmap (xdr len + bitmaps) and the attr xdr len words
5231		 * are stored with the acl data to handle the problem of
5232		 * variable length bitmaps.*/
5233		res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5234		res->acl_len = attrlen;
5235
5236		/* Check for receive buffer overflow */
5237		if (res->acl_len > (xdr->nwords << 2) ||
5238		    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5239			res->acl_flags |= NFS4_ACL_TRUNC;
5240			dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5241					attrlen, xdr->nwords << 2);
5242		}
5243	} else
5244		status = -EOPNOTSUPP;
5245
5246out:
5247	return status;
5248}
5249
5250static int
5251decode_savefh(struct xdr_stream *xdr)
5252{
5253	return decode_op_hdr(xdr, OP_SAVEFH);
5254}
5255
5256static int decode_setattr(struct xdr_stream *xdr)
5257{
5258	__be32 *p;
5259	uint32_t bmlen;
5260	int status;
5261
5262	status = decode_op_hdr(xdr, OP_SETATTR);
5263	if (status)
5264		return status;
5265	p = xdr_inline_decode(xdr, 4);
5266	if (unlikely(!p))
5267		goto out_overflow;
5268	bmlen = be32_to_cpup(p);
5269	p = xdr_inline_decode(xdr, bmlen << 2);
5270	if (likely(p))
5271		return 0;
5272out_overflow:
5273	print_overflow_msg(__func__, xdr);
5274	return -EIO;
5275}
5276
5277static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5278{
5279	__be32 *p;
5280	uint32_t opnum;
5281	int32_t nfserr;
5282
5283	p = xdr_inline_decode(xdr, 8);
5284	if (unlikely(!p))
5285		goto out_overflow;
5286	opnum = be32_to_cpup(p++);
5287	if (opnum != OP_SETCLIENTID) {
5288		dprintk("nfs: decode_setclientid: Server returned operation"
5289			" %d\n", opnum);
5290		return -EIO;
5291	}
5292	nfserr = be32_to_cpup(p);
5293	if (nfserr == NFS_OK) {
5294		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5295		if (unlikely(!p))
5296			goto out_overflow;
5297		p = xdr_decode_hyper(p, &res->clientid);
5298		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5299	} else if (nfserr == NFSERR_CLID_INUSE) {
5300		uint32_t len;
5301
5302		/* skip netid string */
5303		p = xdr_inline_decode(xdr, 4);
5304		if (unlikely(!p))
5305			goto out_overflow;
5306		len = be32_to_cpup(p);
5307		p = xdr_inline_decode(xdr, len);
5308		if (unlikely(!p))
5309			goto out_overflow;
5310
5311		/* skip uaddr string */
5312		p = xdr_inline_decode(xdr, 4);
5313		if (unlikely(!p))
5314			goto out_overflow;
5315		len = be32_to_cpup(p);
5316		p = xdr_inline_decode(xdr, len);
5317		if (unlikely(!p))
5318			goto out_overflow;
5319		return -NFSERR_CLID_INUSE;
5320	} else
5321		return nfs4_stat_to_errno(nfserr);
5322
5323	return 0;
5324out_overflow:
5325	print_overflow_msg(__func__, xdr);
5326	return -EIO;
5327}
5328
5329static int decode_setclientid_confirm(struct xdr_stream *xdr)
5330{
5331	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5332}
5333
5334static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5335{
5336	__be32 *p;
5337	int status;
5338
5339	status = decode_op_hdr(xdr, OP_WRITE);
5340	if (status)
5341		return status;
5342
5343	p = xdr_inline_decode(xdr, 8);
5344	if (unlikely(!p))
5345		goto out_overflow;
5346	res->count = be32_to_cpup(p++);
5347	res->verf->committed = be32_to_cpup(p++);
5348	return decode_write_verifier(xdr, &res->verf->verifier);
5349out_overflow:
5350	print_overflow_msg(__func__, xdr);
5351	return -EIO;
5352}
5353
5354static int decode_delegreturn(struct xdr_stream *xdr)
5355{
5356	return decode_op_hdr(xdr, OP_DELEGRETURN);
5357}
5358
5359static int decode_secinfo_gss(struct xdr_stream *xdr,
5360			      struct nfs4_secinfo4 *flavor)
5361{
5362	u32 oid_len;
5363	__be32 *p;
5364
5365	p = xdr_inline_decode(xdr, 4);
5366	if (unlikely(!p))
5367		goto out_overflow;
5368	oid_len = be32_to_cpup(p);
5369	if (oid_len > GSS_OID_MAX_LEN)
5370		goto out_err;
5371
5372	p = xdr_inline_decode(xdr, oid_len);
5373	if (unlikely(!p))
5374		goto out_overflow;
5375	memcpy(flavor->flavor_info.oid.data, p, oid_len);
5376	flavor->flavor_info.oid.len = oid_len;
5377
5378	p = xdr_inline_decode(xdr, 8);
5379	if (unlikely(!p))
5380		goto out_overflow;
5381	flavor->flavor_info.qop = be32_to_cpup(p++);
5382	flavor->flavor_info.service = be32_to_cpup(p);
5383
5384	return 0;
5385
5386out_overflow:
5387	print_overflow_msg(__func__, xdr);
5388	return -EIO;
5389out_err:
5390	return -EINVAL;
5391}
5392
5393static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5394{
5395	struct nfs4_secinfo4 *sec_flavor;
5396	unsigned int i, num_flavors;
5397	int status;
5398	__be32 *p;
5399
5400	p = xdr_inline_decode(xdr, 4);
5401	if (unlikely(!p))
5402		goto out_overflow;
5403
5404	res->flavors->num_flavors = 0;
5405	num_flavors = be32_to_cpup(p);
5406
5407	for (i = 0; i < num_flavors; i++) {
5408		sec_flavor = &res->flavors->flavors[i];
5409		if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5410			break;
5411
5412		p = xdr_inline_decode(xdr, 4);
5413		if (unlikely(!p))
5414			goto out_overflow;
5415		sec_flavor->flavor = be32_to_cpup(p);
5416
5417		if (sec_flavor->flavor == RPC_AUTH_GSS) {
5418			status = decode_secinfo_gss(xdr, sec_flavor);
5419			if (status)
5420				goto out;
5421		}
5422		res->flavors->num_flavors++;
5423	}
5424
5425	status = 0;
5426out:
5427	return status;
5428out_overflow:
5429	print_overflow_msg(__func__, xdr);
5430	return -EIO;
5431}
5432
5433static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5434{
5435	int status = decode_op_hdr(xdr, OP_SECINFO);
5436	if (status)
5437		return status;
5438	return decode_secinfo_common(xdr, res);
5439}
5440
5441#if defined(CONFIG_NFS_V4_1)
5442static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5443{
5444	int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5445	if (status)
5446		return status;
5447	return decode_secinfo_common(xdr, res);
5448}
5449
5450static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5451{
5452	__be32 *p;
5453	uint32_t bitmap_words;
5454	unsigned int i;
5455
5456	p = xdr_inline_decode(xdr, 4);
5457	bitmap_words = be32_to_cpup(p++);
5458	if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5459		return -EIO;
5460	p = xdr_inline_decode(xdr, 4 * bitmap_words);
5461	for (i = 0; i < bitmap_words; i++)
5462		op_map->u.words[i] = be32_to_cpup(p++);
5463
5464	return 0;
5465}
5466
5467static int decode_exchange_id(struct xdr_stream *xdr,
5468			      struct nfs41_exchange_id_res *res)
5469{
5470	__be32 *p;
5471	uint32_t dummy;
5472	char *dummy_str;
5473	int status;
5474	uint32_t impl_id_count;
5475
5476	status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5477	if (status)
5478		return status;
5479
5480	p = xdr_inline_decode(xdr, 8);
5481	if (unlikely(!p))
5482		goto out_overflow;
5483	xdr_decode_hyper(p, &res->clientid);
5484	p = xdr_inline_decode(xdr, 12);
5485	if (unlikely(!p))
5486		goto out_overflow;
5487	res->seqid = be32_to_cpup(p++);
5488	res->flags = be32_to_cpup(p++);
5489
5490	res->state_protect.how = be32_to_cpup(p);
5491	switch (res->state_protect.how) {
5492	case SP4_NONE:
5493		break;
5494	case SP4_MACH_CRED:
5495		status = decode_op_map(xdr, &res->state_protect.enforce);
5496		if (status)
5497			return status;
5498		status = decode_op_map(xdr, &res->state_protect.allow);
5499		if (status)
5500			return status;
5501		break;
5502	default:
5503		WARN_ON_ONCE(1);
5504		return -EIO;
5505	}
5506
5507	/* server_owner4.so_minor_id */
5508	p = xdr_inline_decode(xdr, 8);
5509	if (unlikely(!p))
5510		goto out_overflow;
5511	p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5512
5513	/* server_owner4.so_major_id */
5514	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5515	if (unlikely(status))
5516		return status;
5517	if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5518		return -EIO;
5519	memcpy(res->server_owner->major_id, dummy_str, dummy);
5520	res->server_owner->major_id_sz = dummy;
5521
5522	/* server_scope4 */
5523	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5524	if (unlikely(status))
5525		return status;
5526	if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5527		return -EIO;
5528	memcpy(res->server_scope->server_scope, dummy_str, dummy);
5529	res->server_scope->server_scope_sz = dummy;
5530
5531	/* Implementation Id */
5532	p = xdr_inline_decode(xdr, 4);
5533	if (unlikely(!p))
5534		goto out_overflow;
5535	impl_id_count = be32_to_cpup(p++);
5536
5537	if (impl_id_count) {
5538		/* nii_domain */
5539		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5540		if (unlikely(status))
5541			return status;
5542		if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5543			return -EIO;
5544		memcpy(res->impl_id->domain, dummy_str, dummy);
5545
5546		/* nii_name */
5547		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5548		if (unlikely(status))
5549			return status;
5550		if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5551			return -EIO;
5552		memcpy(res->impl_id->name, dummy_str, dummy);
5553
5554		/* nii_date */
5555		p = xdr_inline_decode(xdr, 12);
5556		if (unlikely(!p))
5557			goto out_overflow;
5558		p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5559		res->impl_id->date.nseconds = be32_to_cpup(p);
5560
5561		/* if there's more than one entry, ignore the rest */
5562	}
5563	return 0;
5564out_overflow:
5565	print_overflow_msg(__func__, xdr);
5566	return -EIO;
5567}
5568
5569static int decode_chan_attrs(struct xdr_stream *xdr,
5570			     struct nfs4_channel_attrs *attrs)
5571{
5572	__be32 *p;
5573	u32 nr_attrs, val;
5574
5575	p = xdr_inline_decode(xdr, 28);
5576	if (unlikely(!p))
5577		goto out_overflow;
5578	val = be32_to_cpup(p++);	/* headerpadsz */
5579	if (val)
5580		return -EINVAL;		/* no support for header padding yet */
5581	attrs->max_rqst_sz = be32_to_cpup(p++);
5582	attrs->max_resp_sz = be32_to_cpup(p++);
5583	attrs->max_resp_sz_cached = be32_to_cpup(p++);
5584	attrs->max_ops = be32_to_cpup(p++);
5585	attrs->max_reqs = be32_to_cpup(p++);
5586	nr_attrs = be32_to_cpup(p);
5587	if (unlikely(nr_attrs > 1)) {
5588		printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5589			"count %u\n", __func__, nr_attrs);
5590		return -EINVAL;
5591	}
5592	if (nr_attrs == 1) {
5593		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5594		if (unlikely(!p))
5595			goto out_overflow;
5596	}
5597	return 0;
5598out_overflow:
5599	print_overflow_msg(__func__, xdr);
5600	return -EIO;
5601}
5602
5603static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5604{
5605	return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5606}
5607
5608static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5609				struct nfs41_bind_conn_to_session_res *res)
5610{
5611	__be32 *p;
5612	int status;
5613
5614	status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5615	if (!status)
5616		status = decode_sessionid(xdr, &res->sessionid);
5617	if (unlikely(status))
5618		return status;
5619
5620	/* dir flags, rdma mode bool */
5621	p = xdr_inline_decode(xdr, 8);
5622	if (unlikely(!p))
5623		goto out_overflow;
5624
5625	res->dir = be32_to_cpup(p++);
5626	if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5627		return -EIO;
5628	if (be32_to_cpup(p) == 0)
5629		res->use_conn_in_rdma_mode = false;
5630	else
5631		res->use_conn_in_rdma_mode = true;
5632
5633	return 0;
5634out_overflow:
5635	print_overflow_msg(__func__, xdr);
5636	return -EIO;
5637}
5638
5639static int decode_create_session(struct xdr_stream *xdr,
5640				 struct nfs41_create_session_res *res)
5641{
5642	__be32 *p;
5643	int status;
5644
5645	status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5646	if (!status)
5647		status = decode_sessionid(xdr, &res->sessionid);
5648	if (unlikely(status))
5649		return status;
5650
5651	/* seqid, flags */
5652	p = xdr_inline_decode(xdr, 8);
5653	if (unlikely(!p))
5654		goto out_overflow;
5655	res->seqid = be32_to_cpup(p++);
5656	res->flags = be32_to_cpup(p);
5657
5658	/* Channel attributes */
5659	status = decode_chan_attrs(xdr, &res->fc_attrs);
5660	if (!status)
5661		status = decode_chan_attrs(xdr, &res->bc_attrs);
5662	return status;
5663out_overflow:
5664	print_overflow_msg(__func__, xdr);
5665	return -EIO;
5666}
5667
5668static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5669{
5670	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5671}
5672
5673static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5674{
5675	return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5676}
5677
5678static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5679{
5680	return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5681}
5682#endif /* CONFIG_NFS_V4_1 */
5683
5684static int decode_sequence(struct xdr_stream *xdr,
5685			   struct nfs4_sequence_res *res,
5686			   struct rpc_rqst *rqstp)
5687{
5688#if defined(CONFIG_NFS_V4_1)
5689	struct nfs4_session *session;
5690	struct nfs4_sessionid id;
5691	u32 dummy;
5692	int status;
5693	__be32 *p;
5694
5695	if (res->sr_slot == NULL)
5696		return 0;
5697	if (!res->sr_slot->table->session)
5698		return 0;
5699
5700	status = decode_op_hdr(xdr, OP_SEQUENCE);
5701	if (!status)
5702		status = decode_sessionid(xdr, &id);
5703	if (unlikely(status))
5704		goto out_err;
5705
5706	/*
5707	 * If the server returns different values for sessionID, slotID or
5708	 * sequence number, the server is looney tunes.
5709	 */
5710	status = -EREMOTEIO;
5711	session = res->sr_slot->table->session;
5712
5713	if (memcmp(id.data, session->sess_id.data,
5714		   NFS4_MAX_SESSIONID_LEN)) {
5715		dprintk("%s Invalid session id\n", __func__);
5716		goto out_err;
5717	}
5718
5719	p = xdr_inline_decode(xdr, 20);
5720	if (unlikely(!p))
5721		goto out_overflow;
5722
5723	/* seqid */
5724	dummy = be32_to_cpup(p++);
5725	if (dummy != res->sr_slot->seq_nr) {
5726		dprintk("%s Invalid sequence number\n", __func__);
5727		goto out_err;
5728	}
5729	/* slot id */
5730	dummy = be32_to_cpup(p++);
5731	if (dummy != res->sr_slot->slot_nr) {
5732		dprintk("%s Invalid slot id\n", __func__);
5733		goto out_err;
5734	}
5735	/* highest slot id */
5736	res->sr_highest_slotid = be32_to_cpup(p++);
5737	/* target highest slot id */
5738	res->sr_target_highest_slotid = be32_to_cpup(p++);
5739	/* result flags */
5740	res->sr_status_flags = be32_to_cpup(p);
5741	status = 0;
5742out_err:
5743	res->sr_status = status;
5744	return status;
5745out_overflow:
5746	print_overflow_msg(__func__, xdr);
5747	status = -EIO;
5748	goto out_err;
5749#else  /* CONFIG_NFS_V4_1 */
5750	return 0;
5751#endif /* CONFIG_NFS_V4_1 */
5752}
5753
5754#if defined(CONFIG_NFS_V4_1)
5755static int decode_getdeviceinfo(struct xdr_stream *xdr,
5756				struct nfs4_getdeviceinfo_res *res)
5757{
5758	struct pnfs_device *pdev = res->pdev;
5759	__be32 *p;
5760	uint32_t len, type;
5761	int status;
5762
5763	status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5764	if (status) {
5765		if (status == -ETOOSMALL) {
5766			p = xdr_inline_decode(xdr, 4);
5767			if (unlikely(!p))
5768				goto out_overflow;
5769			pdev->mincount = be32_to_cpup(p);
5770			dprintk("%s: Min count too small. mincnt = %u\n",
5771				__func__, pdev->mincount);
5772		}
5773		return status;
5774	}
5775
5776	p = xdr_inline_decode(xdr, 8);
5777	if (unlikely(!p))
5778		goto out_overflow;
5779	type = be32_to_cpup(p++);
5780	if (type != pdev->layout_type) {
5781		dprintk("%s: layout mismatch req: %u pdev: %u\n",
5782			__func__, pdev->layout_type, type);
5783		return -EINVAL;
5784	}
5785	/*
5786	 * Get the length of the opaque device_addr4. xdr_read_pages places
5787	 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5788	 * and places the remaining xdr data in xdr_buf->tail
5789	 */
5790	pdev->mincount = be32_to_cpup(p);
5791	if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5792		goto out_overflow;
5793
5794	/* Parse notification bitmap, verifying that it is zero. */
5795	p = xdr_inline_decode(xdr, 4);
5796	if (unlikely(!p))
5797		goto out_overflow;
5798	len = be32_to_cpup(p);
5799	if (len) {
5800		uint32_t i;
5801
5802		p = xdr_inline_decode(xdr, 4 * len);
5803		if (unlikely(!p))
5804			goto out_overflow;
5805
5806		res->notification = be32_to_cpup(p++);
5807		for (i = 1; i < len; i++) {
5808			if (be32_to_cpup(p++)) {
5809				dprintk("%s: unsupported notification\n",
5810					__func__);
5811				return -EIO;
5812			}
5813		}
5814	}
5815	return 0;
5816out_overflow:
5817	print_overflow_msg(__func__, xdr);
5818	return -EIO;
5819}
5820
5821static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5822			    struct nfs4_layoutget_res *res)
5823{
5824	__be32 *p;
5825	int status;
5826	u32 layout_count;
5827	u32 recvd;
5828
5829	status = decode_op_hdr(xdr, OP_LAYOUTGET);
5830	if (status)
5831		return status;
5832	p = xdr_inline_decode(xdr, 4);
5833	if (unlikely(!p))
5834		goto out_overflow;
5835	res->return_on_close = be32_to_cpup(p);
5836	decode_stateid(xdr, &res->stateid);
5837	p = xdr_inline_decode(xdr, 4);
5838	if (unlikely(!p))
5839		goto out_overflow;
5840	layout_count = be32_to_cpup(p);
5841	if (!layout_count) {
5842		dprintk("%s: server responded with empty layout array\n",
5843			__func__);
5844		return -EINVAL;
5845	}
5846
5847	p = xdr_inline_decode(xdr, 28);
5848	if (unlikely(!p))
5849		goto out_overflow;
5850	p = xdr_decode_hyper(p, &res->range.offset);
5851	p = xdr_decode_hyper(p, &res->range.length);
5852	res->range.iomode = be32_to_cpup(p++);
5853	res->type = be32_to_cpup(p++);
5854	res->layoutp->len = be32_to_cpup(p);
5855
5856	dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5857		__func__,
5858		(unsigned long)res->range.offset,
5859		(unsigned long)res->range.length,
5860		res->range.iomode,
5861		res->type,
5862		res->layoutp->len);
5863
5864	recvd = xdr_read_pages(xdr, res->layoutp->len);
5865	if (res->layoutp->len > recvd) {
5866		dprintk("NFS: server cheating in layoutget reply: "
5867				"layout len %u > recvd %u\n",
5868				res->layoutp->len, recvd);
5869		return -EINVAL;
5870	}
5871
5872	if (layout_count > 1) {
5873		/* We only handle a length one array at the moment.  Any
5874		 * further entries are just ignored.  Note that this means
5875		 * the client may see a response that is less than the
5876		 * minimum it requested.
5877		 */
5878		dprintk("%s: server responded with %d layouts, dropping tail\n",
5879			__func__, layout_count);
5880	}
5881
5882	return 0;
5883out_overflow:
5884	print_overflow_msg(__func__, xdr);
5885	return -EIO;
5886}
5887
5888static int decode_layoutreturn(struct xdr_stream *xdr,
5889			       struct nfs4_layoutreturn_res *res)
5890{
5891	__be32 *p;
5892	int status;
5893
5894	status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5895	if (status)
5896		return status;
5897	p = xdr_inline_decode(xdr, 4);
5898	if (unlikely(!p))
5899		goto out_overflow;
5900	res->lrs_present = be32_to_cpup(p);
5901	if (res->lrs_present)
5902		status = decode_stateid(xdr, &res->stateid);
5903	return status;
5904out_overflow:
5905	print_overflow_msg(__func__, xdr);
5906	return -EIO;
5907}
5908
5909static int decode_layoutcommit(struct xdr_stream *xdr,
5910			       struct rpc_rqst *req,
5911			       struct nfs4_layoutcommit_res *res)
5912{
5913	__be32 *p;
5914	__u32 sizechanged;
5915	int status;
5916
5917	status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5918	res->status = status;
5919	if (status)
5920		return status;
5921
5922	p = xdr_inline_decode(xdr, 4);
5923	if (unlikely(!p))
5924		goto out_overflow;
5925	sizechanged = be32_to_cpup(p);
5926
5927	if (sizechanged) {
5928		/* throw away new size */
5929		p = xdr_inline_decode(xdr, 8);
5930		if (unlikely(!p))
5931			goto out_overflow;
5932	}
5933	return 0;
5934out_overflow:
5935	print_overflow_msg(__func__, xdr);
5936	return -EIO;
5937}
5938
5939static int decode_test_stateid(struct xdr_stream *xdr,
5940			       struct nfs41_test_stateid_res *res)
5941{
5942	__be32 *p;
5943	int status;
5944	int num_res;
5945
5946	status = decode_op_hdr(xdr, OP_TEST_STATEID);
5947	if (status)
5948		return status;
5949
5950	p = xdr_inline_decode(xdr, 4);
5951	if (unlikely(!p))
5952		goto out_overflow;
5953	num_res = be32_to_cpup(p++);
5954	if (num_res != 1)
5955		goto out;
5956
5957	p = xdr_inline_decode(xdr, 4);
5958	if (unlikely(!p))
5959		goto out_overflow;
5960	res->status = be32_to_cpup(p++);
5961
5962	return status;
5963out_overflow:
5964	print_overflow_msg(__func__, xdr);
5965out:
5966	return -EIO;
5967}
5968
5969static int decode_free_stateid(struct xdr_stream *xdr,
5970			       struct nfs41_free_stateid_res *res)
5971{
5972	res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5973	return res->status;
5974}
5975#endif /* CONFIG_NFS_V4_1 */
5976
5977/*
5978 * END OF "GENERIC" DECODE ROUTINES.
5979 */
5980
5981/*
5982 * Decode OPEN_DOWNGRADE response
5983 */
5984static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5985				       struct xdr_stream *xdr,
5986				       struct nfs_closeres *res)
5987{
5988	struct compound_hdr hdr;
5989	int status;
5990
5991	status = decode_compound_hdr(xdr, &hdr);
5992	if (status)
5993		goto out;
5994	status = decode_sequence(xdr, &res->seq_res, rqstp);
5995	if (status)
5996		goto out;
5997	status = decode_putfh(xdr);
5998	if (status)
5999		goto out;
6000	status = decode_open_downgrade(xdr, res);
6001	if (status != 0)
6002		goto out;
6003	decode_getfattr(xdr, res->fattr, res->server);
6004out:
6005	return status;
6006}
6007
6008/*
6009 * Decode ACCESS response
6010 */
6011static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6012			       struct nfs4_accessres *res)
6013{
6014	struct compound_hdr hdr;
6015	int status;
6016
6017	status = decode_compound_hdr(xdr, &hdr);
6018	if (status)
6019		goto out;
6020	status = decode_sequence(xdr, &res->seq_res, rqstp);
6021	if (status)
6022		goto out;
6023	status = decode_putfh(xdr);
6024	if (status != 0)
6025		goto out;
6026	status = decode_access(xdr, &res->supported, &res->access);
6027	if (status != 0)
6028		goto out;
6029	decode_getfattr(xdr, res->fattr, res->server);
6030out:
6031	return status;
6032}
6033
6034/*
6035 * Decode LOOKUP response
6036 */
6037static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6038			       struct nfs4_lookup_res *res)
6039{
6040	struct compound_hdr hdr;
6041	int status;
6042
6043	status = decode_compound_hdr(xdr, &hdr);
6044	if (status)
6045		goto out;
6046	status = decode_sequence(xdr, &res->seq_res, rqstp);
6047	if (status)
6048		goto out;
6049	status = decode_putfh(xdr);
6050	if (status)
6051		goto out;
6052	status = decode_lookup(xdr);
6053	if (status)
6054		goto out;
6055	status = decode_getfh(xdr, res->fh);
6056	if (status)
6057		goto out;
6058	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6059out:
6060	return status;
6061}
6062
6063/*
6064 * Decode LOOKUP_ROOT response
6065 */
6066static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6067				    struct xdr_stream *xdr,
6068				    struct nfs4_lookup_res *res)
6069{
6070	struct compound_hdr hdr;
6071	int status;
6072
6073	status = decode_compound_hdr(xdr, &hdr);
6074	if (status)
6075		goto out;
6076	status = decode_sequence(xdr, &res->seq_res, rqstp);
6077	if (status)
6078		goto out;
6079	status = decode_putrootfh(xdr);
6080	if (status)
6081		goto out;
6082	status = decode_getfh(xdr, res->fh);
6083	if (status == 0)
6084		status = decode_getfattr_label(xdr, res->fattr,
6085						res->label, res->server);
6086out:
6087	return status;
6088}
6089
6090/*
6091 * Decode REMOVE response
6092 */
6093static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094			       struct nfs_removeres *res)
6095{
6096	struct compound_hdr hdr;
6097	int status;
6098
6099	status = decode_compound_hdr(xdr, &hdr);
6100	if (status)
6101		goto out;
6102	status = decode_sequence(xdr, &res->seq_res, rqstp);
6103	if (status)
6104		goto out;
6105	status = decode_putfh(xdr);
6106	if (status)
6107		goto out;
6108	status = decode_remove(xdr, &res->cinfo);
6109out:
6110	return status;
6111}
6112
6113/*
6114 * Decode RENAME response
6115 */
6116static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6117			       struct nfs_renameres *res)
6118{
6119	struct compound_hdr hdr;
6120	int status;
6121
6122	status = decode_compound_hdr(xdr, &hdr);
6123	if (status)
6124		goto out;
6125	status = decode_sequence(xdr, &res->seq_res, rqstp);
6126	if (status)
6127		goto out;
6128	status = decode_putfh(xdr);
6129	if (status)
6130		goto out;
6131	status = decode_savefh(xdr);
6132	if (status)
6133		goto out;
6134	status = decode_putfh(xdr);
6135	if (status)
6136		goto out;
6137	status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6138out:
6139	return status;
6140}
6141
6142/*
6143 * Decode LINK response
6144 */
6145static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6146			     struct nfs4_link_res *res)
6147{
6148	struct compound_hdr hdr;
6149	int status;
6150
6151	status = decode_compound_hdr(xdr, &hdr);
6152	if (status)
6153		goto out;
6154	status = decode_sequence(xdr, &res->seq_res, rqstp);
6155	if (status)
6156		goto out;
6157	status = decode_putfh(xdr);
6158	if (status)
6159		goto out;
6160	status = decode_savefh(xdr);
6161	if (status)
6162		goto out;
6163	status = decode_putfh(xdr);
6164	if (status)
6165		goto out;
6166	status = decode_link(xdr, &res->cinfo);
6167	if (status)
6168		goto out;
6169	/*
6170	 * Note order: OP_LINK leaves the directory as the current
6171	 *             filehandle.
6172	 */
6173	status = decode_restorefh(xdr);
6174	if (status)
6175		goto out;
6176	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6177out:
6178	return status;
6179}
6180
6181/*
6182 * Decode CREATE response
6183 */
6184static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6185			       struct nfs4_create_res *res)
6186{
6187	struct compound_hdr hdr;
6188	int status;
6189
6190	status = decode_compound_hdr(xdr, &hdr);
6191	if (status)
6192		goto out;
6193	status = decode_sequence(xdr, &res->seq_res, rqstp);
6194	if (status)
6195		goto out;
6196	status = decode_putfh(xdr);
6197	if (status)
6198		goto out;
6199	status = decode_create(xdr, &res->dir_cinfo);
6200	if (status)
6201		goto out;
6202	status = decode_getfh(xdr, res->fh);
6203	if (status)
6204		goto out;
6205	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6206out:
6207	return status;
6208}
6209
6210/*
6211 * Decode SYMLINK response
6212 */
6213static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6214				struct nfs4_create_res *res)
6215{
6216	return nfs4_xdr_dec_create(rqstp, xdr, res);
6217}
6218
6219/*
6220 * Decode GETATTR response
6221 */
6222static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6223				struct nfs4_getattr_res *res)
6224{
6225	struct compound_hdr hdr;
6226	int status;
6227
6228	status = decode_compound_hdr(xdr, &hdr);
6229	if (status)
6230		goto out;
6231	status = decode_sequence(xdr, &res->seq_res, rqstp);
6232	if (status)
6233		goto out;
6234	status = decode_putfh(xdr);
6235	if (status)
6236		goto out;
6237	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6238out:
6239	return status;
6240}
6241
6242/*
6243 * Encode an SETACL request
6244 */
6245static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6246				struct nfs_setaclargs *args)
6247{
6248	struct compound_hdr hdr = {
6249		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
6250	};
6251
6252	encode_compound_hdr(xdr, req, &hdr);
6253	encode_sequence(xdr, &args->seq_args, &hdr);
6254	encode_putfh(xdr, args->fh, &hdr);
6255	encode_setacl(xdr, args, &hdr);
6256	encode_nops(&hdr);
6257}
6258
6259/*
6260 * Decode SETACL response
6261 */
6262static int
6263nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264		    struct nfs_setaclres *res)
6265{
6266	struct compound_hdr hdr;
6267	int status;
6268
6269	status = decode_compound_hdr(xdr, &hdr);
6270	if (status)
6271		goto out;
6272	status = decode_sequence(xdr, &res->seq_res, rqstp);
6273	if (status)
6274		goto out;
6275	status = decode_putfh(xdr);
6276	if (status)
6277		goto out;
6278	status = decode_setattr(xdr);
6279out:
6280	return status;
6281}
6282
6283/*
6284 * Decode GETACL response
6285 */
6286static int
6287nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6288		    struct nfs_getaclres *res)
6289{
6290	struct compound_hdr hdr;
6291	int status;
6292
6293	if (res->acl_scratch != NULL) {
6294		void *p = page_address(res->acl_scratch);
6295		xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6296	}
6297	status = decode_compound_hdr(xdr, &hdr);
6298	if (status)
6299		goto out;
6300	status = decode_sequence(xdr, &res->seq_res, rqstp);
6301	if (status)
6302		goto out;
6303	status = decode_putfh(xdr);
6304	if (status)
6305		goto out;
6306	status = decode_getacl(xdr, rqstp, res);
6307
6308out:
6309	return status;
6310}
6311
6312/*
6313 * Decode CLOSE response
6314 */
6315static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6316			      struct nfs_closeres *res)
6317{
6318	struct compound_hdr hdr;
6319	int status;
6320
6321	status = decode_compound_hdr(xdr, &hdr);
6322	if (status)
6323		goto out;
6324	status = decode_sequence(xdr, &res->seq_res, rqstp);
6325	if (status)
6326		goto out;
6327	status = decode_putfh(xdr);
6328	if (status)
6329		goto out;
6330	status = decode_close(xdr, res);
6331	if (status != 0)
6332		goto out;
6333	/*
6334	 * Note: Server may do delete on close for this file
6335	 * 	in which case the getattr call will fail with
6336	 * 	an ESTALE error. Shouldn't be a problem,
6337	 * 	though, since fattr->valid will remain unset.
6338	 */
6339	decode_getfattr(xdr, res->fattr, res->server);
6340out:
6341	return status;
6342}
6343
6344/*
6345 * Decode OPEN response
6346 */
6347static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6348			     struct nfs_openres *res)
6349{
6350	struct compound_hdr hdr;
6351	int status;
6352
6353	status = decode_compound_hdr(xdr, &hdr);
6354	if (status)
6355		goto out;
6356	status = decode_sequence(xdr, &res->seq_res, rqstp);
6357	if (status)
6358		goto out;
6359	status = decode_putfh(xdr);
6360	if (status)
6361		goto out;
6362	status = decode_open(xdr, res);
6363	if (status)
6364		goto out;
6365	status = decode_getfh(xdr, &res->fh);
6366	if (status)
6367		goto out;
6368	if (res->access_request)
6369		decode_access(xdr, &res->access_supported, &res->access_result);
6370	decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6371out:
6372	return status;
6373}
6374
6375/*
6376 * Decode OPEN_CONFIRM response
6377 */
6378static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6379				     struct xdr_stream *xdr,
6380				     struct nfs_open_confirmres *res)
6381{
6382	struct compound_hdr hdr;
6383	int status;
6384
6385	status = decode_compound_hdr(xdr, &hdr);
6386	if (status)
6387		goto out;
6388	status = decode_putfh(xdr);
6389	if (status)
6390		goto out;
6391	status = decode_open_confirm(xdr, res);
6392out:
6393	return status;
6394}
6395
6396/*
6397 * Decode OPEN response
6398 */
6399static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6400				    struct xdr_stream *xdr,
6401				    struct nfs_openres *res)
6402{
6403	struct compound_hdr hdr;
6404	int status;
6405
6406	status = decode_compound_hdr(xdr, &hdr);
6407	if (status)
6408		goto out;
6409	status = decode_sequence(xdr, &res->seq_res, rqstp);
6410	if (status)
6411		goto out;
6412	status = decode_putfh(xdr);
6413	if (status)
6414		goto out;
6415	status = decode_open(xdr, res);
6416	if (status)
6417		goto out;
6418	if (res->access_request)
6419		decode_access(xdr, &res->access_supported, &res->access_result);
6420	decode_getfattr(xdr, res->f_attr, res->server);
6421out:
6422	return status;
6423}
6424
6425/*
6426 * Decode SETATTR response
6427 */
6428static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6429				struct xdr_stream *xdr,
6430				struct nfs_setattrres *res)
6431{
6432	struct compound_hdr hdr;
6433	int status;
6434
6435	status = decode_compound_hdr(xdr, &hdr);
6436	if (status)
6437		goto out;
6438	status = decode_sequence(xdr, &res->seq_res, rqstp);
6439	if (status)
6440		goto out;
6441	status = decode_putfh(xdr);
6442	if (status)
6443		goto out;
6444	status = decode_setattr(xdr);
6445	if (status)
6446		goto out;
6447	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6448out:
6449	return status;
6450}
6451
6452/*
6453 * Decode LOCK response
6454 */
6455static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6456			     struct nfs_lock_res *res)
6457{
6458	struct compound_hdr hdr;
6459	int status;
6460
6461	status = decode_compound_hdr(xdr, &hdr);
6462	if (status)
6463		goto out;
6464	status = decode_sequence(xdr, &res->seq_res, rqstp);
6465	if (status)
6466		goto out;
6467	status = decode_putfh(xdr);
6468	if (status)
6469		goto out;
6470	status = decode_lock(xdr, res);
6471out:
6472	return status;
6473}
6474
6475/*
6476 * Decode LOCKT response
6477 */
6478static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479			      struct nfs_lockt_res *res)
6480{
6481	struct compound_hdr hdr;
6482	int status;
6483
6484	status = decode_compound_hdr(xdr, &hdr);
6485	if (status)
6486		goto out;
6487	status = decode_sequence(xdr, &res->seq_res, rqstp);
6488	if (status)
6489		goto out;
6490	status = decode_putfh(xdr);
6491	if (status)
6492		goto out;
6493	status = decode_lockt(xdr, res);
6494out:
6495	return status;
6496}
6497
6498/*
6499 * Decode LOCKU response
6500 */
6501static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6502			      struct nfs_locku_res *res)
6503{
6504	struct compound_hdr hdr;
6505	int status;
6506
6507	status = decode_compound_hdr(xdr, &hdr);
6508	if (status)
6509		goto out;
6510	status = decode_sequence(xdr, &res->seq_res, rqstp);
6511	if (status)
6512		goto out;
6513	status = decode_putfh(xdr);
6514	if (status)
6515		goto out;
6516	status = decode_locku(xdr, res);
6517out:
6518	return status;
6519}
6520
6521static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6522					  struct xdr_stream *xdr, void *dummy)
6523{
6524	struct compound_hdr hdr;
6525	int status;
6526
6527	status = decode_compound_hdr(xdr, &hdr);
6528	if (!status)
6529		status = decode_release_lockowner(xdr);
6530	return status;
6531}
6532
6533/*
6534 * Decode READLINK response
6535 */
6536static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6537				 struct xdr_stream *xdr,
6538				 struct nfs4_readlink_res *res)
6539{
6540	struct compound_hdr hdr;
6541	int status;
6542
6543	status = decode_compound_hdr(xdr, &hdr);
6544	if (status)
6545		goto out;
6546	status = decode_sequence(xdr, &res->seq_res, rqstp);
6547	if (status)
6548		goto out;
6549	status = decode_putfh(xdr);
6550	if (status)
6551		goto out;
6552	status = decode_readlink(xdr, rqstp);
6553out:
6554	return status;
6555}
6556
6557/*
6558 * Decode READDIR response
6559 */
6560static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6561				struct nfs4_readdir_res *res)
6562{
6563	struct compound_hdr hdr;
6564	int status;
6565
6566	status = decode_compound_hdr(xdr, &hdr);
6567	if (status)
6568		goto out;
6569	status = decode_sequence(xdr, &res->seq_res, rqstp);
6570	if (status)
6571		goto out;
6572	status = decode_putfh(xdr);
6573	if (status)
6574		goto out;
6575	status = decode_readdir(xdr, rqstp, res);
6576out:
6577	return status;
6578}
6579
6580/*
6581 * Decode Read response
6582 */
6583static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584			     struct nfs_pgio_res *res)
6585{
6586	struct compound_hdr hdr;
6587	int status;
6588
6589	status = decode_compound_hdr(xdr, &hdr);
6590	res->op_status = hdr.status;
6591	if (status)
6592		goto out;
6593	status = decode_sequence(xdr, &res->seq_res, rqstp);
6594	if (status)
6595		goto out;
6596	status = decode_putfh(xdr);
6597	if (status)
6598		goto out;
6599	status = decode_read(xdr, rqstp, res);
6600	if (!status)
6601		status = res->count;
6602out:
6603	return status;
6604}
6605
6606/*
6607 * Decode WRITE response
6608 */
6609static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6610			      struct nfs_pgio_res *res)
6611{
6612	struct compound_hdr hdr;
6613	int status;
6614
6615	status = decode_compound_hdr(xdr, &hdr);
6616	res->op_status = hdr.status;
6617	if (status)
6618		goto out;
6619	status = decode_sequence(xdr, &res->seq_res, rqstp);
6620	if (status)
6621		goto out;
6622	status = decode_putfh(xdr);
6623	if (status)
6624		goto out;
6625	status = decode_write(xdr, res);
6626	if (status)
6627		goto out;
6628	if (res->fattr)
6629		decode_getfattr(xdr, res->fattr, res->server);
6630	if (!status)
6631		status = res->count;
6632out:
6633	return status;
6634}
6635
6636/*
6637 * Decode COMMIT response
6638 */
6639static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6640			       struct nfs_commitres *res)
6641{
6642	struct compound_hdr hdr;
6643	int status;
6644
6645	status = decode_compound_hdr(xdr, &hdr);
6646	res->op_status = hdr.status;
6647	if (status)
6648		goto out;
6649	status = decode_sequence(xdr, &res->seq_res, rqstp);
6650	if (status)
6651		goto out;
6652	status = decode_putfh(xdr);
6653	if (status)
6654		goto out;
6655	status = decode_commit(xdr, res);
6656out:
6657	return status;
6658}
6659
6660/*
6661 * Decode FSINFO response
6662 */
6663static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6664			       struct nfs4_fsinfo_res *res)
6665{
6666	struct compound_hdr hdr;
6667	int status;
6668
6669	status = decode_compound_hdr(xdr, &hdr);
6670	if (!status)
6671		status = decode_sequence(xdr, &res->seq_res, req);
6672	if (!status)
6673		status = decode_putfh(xdr);
6674	if (!status)
6675		status = decode_fsinfo(xdr, res->fsinfo);
6676	return status;
6677}
6678
6679/*
6680 * Decode PATHCONF response
6681 */
6682static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6683				 struct nfs4_pathconf_res *res)
6684{
6685	struct compound_hdr hdr;
6686	int status;
6687
6688	status = decode_compound_hdr(xdr, &hdr);
6689	if (!status)
6690		status = decode_sequence(xdr, &res->seq_res, req);
6691	if (!status)
6692		status = decode_putfh(xdr);
6693	if (!status)
6694		status = decode_pathconf(xdr, res->pathconf);
6695	return status;
6696}
6697
6698/*
6699 * Decode STATFS response
6700 */
6701static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6702			       struct nfs4_statfs_res *res)
6703{
6704	struct compound_hdr hdr;
6705	int status;
6706
6707	status = decode_compound_hdr(xdr, &hdr);
6708	if (!status)
6709		status = decode_sequence(xdr, &res->seq_res, req);
6710	if (!status)
6711		status = decode_putfh(xdr);
6712	if (!status)
6713		status = decode_statfs(xdr, res->fsstat);
6714	return status;
6715}
6716
6717/*
6718 * Decode GETATTR_BITMAP response
6719 */
6720static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6721				    struct xdr_stream *xdr,
6722				    struct nfs4_server_caps_res *res)
6723{
6724	struct compound_hdr hdr;
6725	int status;
6726
6727	status = decode_compound_hdr(xdr, &hdr);
6728	if (status)
6729		goto out;
6730	status = decode_sequence(xdr, &res->seq_res, req);
6731	if (status)
6732		goto out;
6733	status = decode_putfh(xdr);
6734	if (status)
6735		goto out;
6736	status = decode_server_caps(xdr, res);
6737out:
6738	return status;
6739}
6740
6741/*
6742 * Decode RENEW response
6743 */
6744static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6745			      void *__unused)
6746{
6747	struct compound_hdr hdr;
6748	int status;
6749
6750	status = decode_compound_hdr(xdr, &hdr);
6751	if (!status)
6752		status = decode_renew(xdr);
6753	return status;
6754}
6755
6756/*
6757 * Decode SETCLIENTID response
6758 */
6759static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6760				    struct xdr_stream *xdr,
6761				    struct nfs4_setclientid_res *res)
6762{
6763	struct compound_hdr hdr;
6764	int status;
6765
6766	status = decode_compound_hdr(xdr, &hdr);
6767	if (!status)
6768		status = decode_setclientid(xdr, res);
6769	return status;
6770}
6771
6772/*
6773 * Decode SETCLIENTID_CONFIRM response
6774 */
6775static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6776					    struct xdr_stream *xdr)
6777{
6778	struct compound_hdr hdr;
6779	int status;
6780
6781	status = decode_compound_hdr(xdr, &hdr);
6782	if (!status)
6783		status = decode_setclientid_confirm(xdr);
6784	return status;
6785}
6786
6787/*
6788 * Decode DELEGRETURN response
6789 */
6790static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6791				    struct xdr_stream *xdr,
6792				    struct nfs4_delegreturnres *res)
6793{
6794	struct compound_hdr hdr;
6795	int status;
6796
6797	status = decode_compound_hdr(xdr, &hdr);
6798	if (status)
6799		goto out;
6800	status = decode_sequence(xdr, &res->seq_res, rqstp);
6801	if (status)
6802		goto out;
6803	status = decode_putfh(xdr);
6804	if (status != 0)
6805		goto out;
6806	status = decode_getfattr(xdr, res->fattr, res->server);
6807	if (status != 0)
6808		goto out;
6809	status = decode_delegreturn(xdr);
6810out:
6811	return status;
6812}
6813
6814/*
6815 * Decode FS_LOCATIONS response
6816 */
6817static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6818				     struct xdr_stream *xdr,
6819				     struct nfs4_fs_locations_res *res)
6820{
6821	struct compound_hdr hdr;
6822	int status;
6823
6824	status = decode_compound_hdr(xdr, &hdr);
6825	if (status)
6826		goto out;
6827	status = decode_sequence(xdr, &res->seq_res, req);
6828	if (status)
6829		goto out;
6830	status = decode_putfh(xdr);
6831	if (status)
6832		goto out;
6833	if (res->migration) {
6834		xdr_enter_page(xdr, PAGE_SIZE);
6835		status = decode_getfattr_generic(xdr,
6836					&res->fs_locations->fattr,
6837					 NULL, res->fs_locations,
6838					 NULL, res->fs_locations->server);
6839		if (status)
6840			goto out;
6841		if (res->renew)
6842			status = decode_renew(xdr);
6843	} else {
6844		status = decode_lookup(xdr);
6845		if (status)
6846			goto out;
6847		xdr_enter_page(xdr, PAGE_SIZE);
6848		status = decode_getfattr_generic(xdr,
6849					&res->fs_locations->fattr,
6850					 NULL, res->fs_locations,
6851					 NULL, res->fs_locations->server);
6852	}
6853out:
6854	return status;
6855}
6856
6857/*
6858 * Decode SECINFO response
6859 */
6860static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6861				struct xdr_stream *xdr,
6862				struct nfs4_secinfo_res *res)
6863{
6864	struct compound_hdr hdr;
6865	int status;
6866
6867	status = decode_compound_hdr(xdr, &hdr);
6868	if (status)
6869		goto out;
6870	status = decode_sequence(xdr, &res->seq_res, rqstp);
6871	if (status)
6872		goto out;
6873	status = decode_putfh(xdr);
6874	if (status)
6875		goto out;
6876	status = decode_secinfo(xdr, res);
6877out:
6878	return status;
6879}
6880
6881/*
6882 * Decode FSID_PRESENT response
6883 */
6884static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6885				     struct xdr_stream *xdr,
6886				     struct nfs4_fsid_present_res *res)
6887{
6888	struct compound_hdr hdr;
6889	int status;
6890
6891	status = decode_compound_hdr(xdr, &hdr);
6892	if (status)
6893		goto out;
6894	status = decode_sequence(xdr, &res->seq_res, rqstp);
6895	if (status)
6896		goto out;
6897	status = decode_putfh(xdr);
6898	if (status)
6899		goto out;
6900	status = decode_getfh(xdr, res->fh);
6901	if (status)
6902		goto out;
6903	if (res->renew)
6904		status = decode_renew(xdr);
6905out:
6906	return status;
6907}
6908
6909#if defined(CONFIG_NFS_V4_1)
6910/*
6911 * Decode BIND_CONN_TO_SESSION response
6912 */
6913static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6914					struct xdr_stream *xdr,
6915					void *res)
6916{
6917	struct compound_hdr hdr;
6918	int status;
6919
6920	status = decode_compound_hdr(xdr, &hdr);
6921	if (!status)
6922		status = decode_bind_conn_to_session(xdr, res);
6923	return status;
6924}
6925
6926/*
6927 * Decode EXCHANGE_ID response
6928 */
6929static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6930				    struct xdr_stream *xdr,
6931				    void *res)
6932{
6933	struct compound_hdr hdr;
6934	int status;
6935
6936	status = decode_compound_hdr(xdr, &hdr);
6937	if (!status)
6938		status = decode_exchange_id(xdr, res);
6939	return status;
6940}
6941
6942/*
6943 * Decode CREATE_SESSION response
6944 */
6945static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6946				       struct xdr_stream *xdr,
6947				       struct nfs41_create_session_res *res)
6948{
6949	struct compound_hdr hdr;
6950	int status;
6951
6952	status = decode_compound_hdr(xdr, &hdr);
6953	if (!status)
6954		status = decode_create_session(xdr, res);
6955	return status;
6956}
6957
6958/*
6959 * Decode DESTROY_SESSION response
6960 */
6961static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6962					struct xdr_stream *xdr,
6963					void *res)
6964{
6965	struct compound_hdr hdr;
6966	int status;
6967
6968	status = decode_compound_hdr(xdr, &hdr);
6969	if (!status)
6970		status = decode_destroy_session(xdr, res);
6971	return status;
6972}
6973
6974/*
6975 * Decode DESTROY_CLIENTID response
6976 */
6977static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6978					struct xdr_stream *xdr,
6979					void *res)
6980{
6981	struct compound_hdr hdr;
6982	int status;
6983
6984	status = decode_compound_hdr(xdr, &hdr);
6985	if (!status)
6986		status = decode_destroy_clientid(xdr, res);
6987	return status;
6988}
6989
6990/*
6991 * Decode SEQUENCE response
6992 */
6993static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6994				 struct xdr_stream *xdr,
6995				 struct nfs4_sequence_res *res)
6996{
6997	struct compound_hdr hdr;
6998	int status;
6999
7000	status = decode_compound_hdr(xdr, &hdr);
7001	if (!status)
7002		status = decode_sequence(xdr, res, rqstp);
7003	return status;
7004}
7005
7006/*
7007 * Decode GET_LEASE_TIME response
7008 */
7009static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7010				       struct xdr_stream *xdr,
7011				       struct nfs4_get_lease_time_res *res)
7012{
7013	struct compound_hdr hdr;
7014	int status;
7015
7016	status = decode_compound_hdr(xdr, &hdr);
7017	if (!status)
7018		status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7019	if (!status)
7020		status = decode_putrootfh(xdr);
7021	if (!status)
7022		status = decode_fsinfo(xdr, res->lr_fsinfo);
7023	return status;
7024}
7025
7026/*
7027 * Decode RECLAIM_COMPLETE response
7028 */
7029static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7030					 struct xdr_stream *xdr,
7031					 struct nfs41_reclaim_complete_res *res)
7032{
7033	struct compound_hdr hdr;
7034	int status;
7035
7036	status = decode_compound_hdr(xdr, &hdr);
7037	if (!status)
7038		status = decode_sequence(xdr, &res->seq_res, rqstp);
7039	if (!status)
7040		status = decode_reclaim_complete(xdr, NULL);
7041	return status;
7042}
7043
7044/*
7045 * Decode GETDEVINFO response
7046 */
7047static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7048				      struct xdr_stream *xdr,
7049				      struct nfs4_getdeviceinfo_res *res)
7050{
7051	struct compound_hdr hdr;
7052	int status;
7053
7054	status = decode_compound_hdr(xdr, &hdr);
7055	if (status != 0)
7056		goto out;
7057	status = decode_sequence(xdr, &res->seq_res, rqstp);
7058	if (status != 0)
7059		goto out;
7060	status = decode_getdeviceinfo(xdr, res);
7061out:
7062	return status;
7063}
7064
7065/*
7066 * Decode LAYOUTGET response
7067 */
7068static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7069				  struct xdr_stream *xdr,
7070				  struct nfs4_layoutget_res *res)
7071{
7072	struct compound_hdr hdr;
7073	int status;
7074
7075	status = decode_compound_hdr(xdr, &hdr);
7076	if (status)
7077		goto out;
7078	status = decode_sequence(xdr, &res->seq_res, rqstp);
7079	if (status)
7080		goto out;
7081	status = decode_putfh(xdr);
7082	if (status)
7083		goto out;
7084	status = decode_layoutget(xdr, rqstp, res);
7085out:
7086	return status;
7087}
7088
7089/*
7090 * Decode LAYOUTRETURN response
7091 */
7092static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7093				     struct xdr_stream *xdr,
7094				     struct nfs4_layoutreturn_res *res)
7095{
7096	struct compound_hdr hdr;
7097	int status;
7098
7099	status = decode_compound_hdr(xdr, &hdr);
7100	if (status)
7101		goto out;
7102	status = decode_sequence(xdr, &res->seq_res, rqstp);
7103	if (status)
7104		goto out;
7105	status = decode_putfh(xdr);
7106	if (status)
7107		goto out;
7108	status = decode_layoutreturn(xdr, res);
7109out:
7110	return status;
7111}
7112
7113/*
7114 * Decode LAYOUTCOMMIT response
7115 */
7116static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7117				     struct xdr_stream *xdr,
7118				     struct nfs4_layoutcommit_res *res)
7119{
7120	struct compound_hdr hdr;
7121	int status;
7122
7123	status = decode_compound_hdr(xdr, &hdr);
7124	if (status)
7125		goto out;
7126	status = decode_sequence(xdr, &res->seq_res, rqstp);
7127	if (status)
7128		goto out;
7129	status = decode_putfh(xdr);
7130	if (status)
7131		goto out;
7132	status = decode_layoutcommit(xdr, rqstp, res);
7133	if (status)
7134		goto out;
7135	decode_getfattr(xdr, res->fattr, res->server);
7136out:
7137	return status;
7138}
7139
7140/*
7141 * Decode SECINFO_NO_NAME response
7142 */
7143static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7144					struct xdr_stream *xdr,
7145					struct nfs4_secinfo_res *res)
7146{
7147	struct compound_hdr hdr;
7148	int status;
7149
7150	status = decode_compound_hdr(xdr, &hdr);
7151	if (status)
7152		goto out;
7153	status = decode_sequence(xdr, &res->seq_res, rqstp);
7154	if (status)
7155		goto out;
7156	status = decode_putrootfh(xdr);
7157	if (status)
7158		goto out;
7159	status = decode_secinfo_no_name(xdr, res);
7160out:
7161	return status;
7162}
7163
7164/*
7165 * Decode TEST_STATEID response
7166 */
7167static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7168				     struct xdr_stream *xdr,
7169				     struct nfs41_test_stateid_res *res)
7170{
7171	struct compound_hdr hdr;
7172	int status;
7173
7174	status = decode_compound_hdr(xdr, &hdr);
7175	if (status)
7176		goto out;
7177	status = decode_sequence(xdr, &res->seq_res, rqstp);
7178	if (status)
7179		goto out;
7180	status = decode_test_stateid(xdr, res);
7181out:
7182	return status;
7183}
7184
7185/*
7186 * Decode FREE_STATEID response
7187 */
7188static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7189				     struct xdr_stream *xdr,
7190				     struct nfs41_free_stateid_res *res)
7191{
7192	struct compound_hdr hdr;
7193	int status;
7194
7195	status = decode_compound_hdr(xdr, &hdr);
7196	if (status)
7197		goto out;
7198	status = decode_sequence(xdr, &res->seq_res, rqstp);
7199	if (status)
7200		goto out;
7201	status = decode_free_stateid(xdr, res);
7202out:
7203	return status;
7204}
7205#endif /* CONFIG_NFS_V4_1 */
7206
7207/**
7208 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7209 *                      the local page cache.
7210 * @xdr: XDR stream where entry resides
7211 * @entry: buffer to fill in with entry data
7212 * @plus: boolean indicating whether this should be a readdirplus entry
7213 *
7214 * Returns zero if successful, otherwise a negative errno value is
7215 * returned.
7216 *
7217 * This function is not invoked during READDIR reply decoding, but
7218 * rather whenever an application invokes the getdents(2) system call
7219 * on a directory already in our cache.
7220 */
7221int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7222		       int plus)
7223{
7224	unsigned int savep;
7225	uint32_t bitmap[3] = {0};
7226	uint32_t len;
7227	__be32 *p = xdr_inline_decode(xdr, 4);
7228	if (unlikely(!p))
7229		goto out_overflow;
7230	if (*p == xdr_zero) {
7231		p = xdr_inline_decode(xdr, 4);
7232		if (unlikely(!p))
7233			goto out_overflow;
7234		if (*p == xdr_zero)
7235			return -EAGAIN;
7236		entry->eof = 1;
7237		return -EBADCOOKIE;
7238	}
7239
7240	p = xdr_inline_decode(xdr, 12);
7241	if (unlikely(!p))
7242		goto out_overflow;
7243	entry->prev_cookie = entry->cookie;
7244	p = xdr_decode_hyper(p, &entry->cookie);
7245	entry->len = be32_to_cpup(p);
7246
7247	p = xdr_inline_decode(xdr, entry->len);
7248	if (unlikely(!p))
7249		goto out_overflow;
7250	entry->name = (const char *) p;
7251
7252	/*
7253	 * In case the server doesn't return an inode number,
7254	 * we fake one here.  (We don't use inode number 0,
7255	 * since glibc seems to choke on it...)
7256	 */
7257	entry->ino = 1;
7258	entry->fattr->valid = 0;
7259
7260	if (decode_attr_bitmap(xdr, bitmap) < 0)
7261		goto out_overflow;
7262
7263	if (decode_attr_length(xdr, &len, &savep) < 0)
7264		goto out_overflow;
7265
7266	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7267			NULL, entry->label, entry->server) < 0)
7268		goto out_overflow;
7269	if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7270		entry->ino = entry->fattr->mounted_on_fileid;
7271	else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7272		entry->ino = entry->fattr->fileid;
7273
7274	entry->d_type = DT_UNKNOWN;
7275	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7276		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7277
7278	return 0;
7279
7280out_overflow:
7281	print_overflow_msg(__func__, xdr);
7282	return -EAGAIN;
7283}
7284
7285/*
7286 * We need to translate between nfs status return values and
7287 * the local errno values which may not be the same.
7288 */
7289static struct {
7290	int stat;
7291	int errno;
7292} nfs_errtbl[] = {
7293	{ NFS4_OK,		0		},
7294	{ NFS4ERR_PERM,		-EPERM		},
7295	{ NFS4ERR_NOENT,	-ENOENT		},
7296	{ NFS4ERR_IO,		-errno_NFSERR_IO},
7297	{ NFS4ERR_NXIO,		-ENXIO		},
7298	{ NFS4ERR_ACCESS,	-EACCES		},
7299	{ NFS4ERR_EXIST,	-EEXIST		},
7300	{ NFS4ERR_XDEV,		-EXDEV		},
7301	{ NFS4ERR_NOTDIR,	-ENOTDIR	},
7302	{ NFS4ERR_ISDIR,	-EISDIR		},
7303	{ NFS4ERR_INVAL,	-EINVAL		},
7304	{ NFS4ERR_FBIG,		-EFBIG		},
7305	{ NFS4ERR_NOSPC,	-ENOSPC		},
7306	{ NFS4ERR_ROFS,		-EROFS		},
7307	{ NFS4ERR_MLINK,	-EMLINK		},
7308	{ NFS4ERR_NAMETOOLONG,	-ENAMETOOLONG	},
7309	{ NFS4ERR_NOTEMPTY,	-ENOTEMPTY	},
7310	{ NFS4ERR_DQUOT,	-EDQUOT		},
7311	{ NFS4ERR_STALE,	-ESTALE		},
7312	{ NFS4ERR_BADHANDLE,	-EBADHANDLE	},
7313	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
7314	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
7315	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
7316	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
7317	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
7318	{ NFS4ERR_LOCKED,	-EAGAIN		},
7319	{ NFS4ERR_SYMLINK,	-ELOOP		},
7320	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
7321	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
7322	{ -1,			-EIO		}
7323};
7324
7325/*
7326 * Convert an NFS error code to a local one.
7327 * This one is used jointly by NFSv2 and NFSv3.
7328 */
7329static int
7330nfs4_stat_to_errno(int stat)
7331{
7332	int i;
7333	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7334		if (nfs_errtbl[i].stat == stat)
7335			return nfs_errtbl[i].errno;
7336	}
7337	if (stat <= 10000 || stat > 10100) {
7338		/* The server is looney tunes. */
7339		return -EREMOTEIO;
7340	}
7341	/* If we cannot translate the error, the recovery routines should
7342	 * handle it.
7343	 * Note: remaining NFSv4 error codes have values > 10000, so should
7344	 * not conflict with native Linux error codes.
7345	 */
7346	return -stat;
7347}
7348
7349#ifdef CONFIG_NFS_V4_2
7350#include "nfs42xdr.c"
7351#endif /* CONFIG_NFS_V4_2 */
7352
7353#define PROC(proc, argtype, restype)				\
7354[NFSPROC4_CLNT_##proc] = {					\
7355	.p_proc   = NFSPROC4_COMPOUND,				\
7356	.p_encode = (kxdreproc_t)nfs4_xdr_##argtype,		\
7357	.p_decode = (kxdrdproc_t)nfs4_xdr_##restype,		\
7358	.p_arglen = NFS4_##argtype##_sz,			\
7359	.p_replen = NFS4_##restype##_sz,			\
7360	.p_statidx = NFSPROC4_CLNT_##proc,			\
7361	.p_name   = #proc,					\
7362}
7363
7364#define STUB(proc)		\
7365[NFSPROC4_CLNT_##proc] = {	\
7366	.p_name = #proc,	\
7367}
7368
7369struct rpc_procinfo	nfs4_procedures[] = {
7370	PROC(READ,		enc_read,		dec_read),
7371	PROC(WRITE,		enc_write,		dec_write),
7372	PROC(COMMIT,		enc_commit,		dec_commit),
7373	PROC(OPEN,		enc_open,		dec_open),
7374	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
7375	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
7376	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
7377	PROC(CLOSE,		enc_close,		dec_close),
7378	PROC(SETATTR,		enc_setattr,		dec_setattr),
7379	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
7380	PROC(RENEW,		enc_renew,		dec_renew),
7381	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
7382	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7383	PROC(LOCK,		enc_lock,		dec_lock),
7384	PROC(LOCKT,		enc_lockt,		dec_lockt),
7385	PROC(LOCKU,		enc_locku,		dec_locku),
7386	PROC(ACCESS,		enc_access,		dec_access),
7387	PROC(GETATTR,		enc_getattr,		dec_getattr),
7388	PROC(LOOKUP,		enc_lookup,		dec_lookup),
7389	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
7390	PROC(REMOVE,		enc_remove,		dec_remove),
7391	PROC(RENAME,		enc_rename,		dec_rename),
7392	PROC(LINK,		enc_link,		dec_link),
7393	PROC(SYMLINK,		enc_symlink,		dec_symlink),
7394	PROC(CREATE,		enc_create,		dec_create),
7395	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
7396	PROC(STATFS,		enc_statfs,		dec_statfs),
7397	PROC(READLINK,		enc_readlink,		dec_readlink),
7398	PROC(READDIR,		enc_readdir,		dec_readdir),
7399	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
7400	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
7401	PROC(GETACL,		enc_getacl,		dec_getacl),
7402	PROC(SETACL,		enc_setacl,		dec_setacl),
7403	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
7404	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
7405	PROC(SECINFO,		enc_secinfo,		dec_secinfo),
7406	PROC(FSID_PRESENT,	enc_fsid_present,	dec_fsid_present),
7407#if defined(CONFIG_NFS_V4_1)
7408	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
7409	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),
7410	PROC(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
7411	PROC(SEQUENCE,		enc_sequence,		dec_sequence),
7412	PROC(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
7413	PROC(RECLAIM_COMPLETE,	enc_reclaim_complete,	dec_reclaim_complete),
7414	PROC(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
7415	PROC(LAYOUTGET,		enc_layoutget,		dec_layoutget),
7416	PROC(LAYOUTCOMMIT,	enc_layoutcommit,	dec_layoutcommit),
7417	PROC(LAYOUTRETURN,	enc_layoutreturn,	dec_layoutreturn),
7418	PROC(SECINFO_NO_NAME,	enc_secinfo_no_name,	dec_secinfo_no_name),
7419	PROC(TEST_STATEID,	enc_test_stateid,	dec_test_stateid),
7420	PROC(FREE_STATEID,	enc_free_stateid,	dec_free_stateid),
7421	STUB(GETDEVICELIST),
7422	PROC(BIND_CONN_TO_SESSION,
7423			enc_bind_conn_to_session, dec_bind_conn_to_session),
7424	PROC(DESTROY_CLIENTID,	enc_destroy_clientid,	dec_destroy_clientid),
7425#endif /* CONFIG_NFS_V4_1 */
7426#ifdef CONFIG_NFS_V4_2
7427	PROC(SEEK,		enc_seek,		dec_seek),
7428	PROC(ALLOCATE,		enc_allocate,		dec_allocate),
7429	PROC(DEALLOCATE,	enc_deallocate,		dec_deallocate),
7430#endif /* CONFIG_NFS_V4_2 */
7431};
7432
7433const struct rpc_version nfs_version4 = {
7434	.number			= 4,
7435	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
7436	.procs			= nfs4_procedures
7437};
7438
7439/*
7440 * Local variables:
7441 *  c-basic-offset: 8
7442 * End:
7443 */
7444