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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 nfstime4_maxsz (3)
102#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
107/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109#else
110#define nfs4_label_maxsz 0
111#endif
112/* We support only one layout type per file system */
113#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114/* This is based on getfattr, which uses the most attributes: */
115#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116 3*nfstime4_maxsz + \
117 nfs4_owner_maxsz + \
118 nfs4_group_maxsz + nfs4_label_maxsz + \
119 decode_mdsthreshold_maxsz))
120#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
121 nfs4_fattr_value_maxsz)
122#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
123#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
124 1 + 2 + 1 + \
125 nfs4_owner_maxsz + \
126 nfs4_group_maxsz + \
127 nfs4_label_maxsz + \
128 1 + nfstime4_maxsz + \
129 1 + nfstime4_maxsz)
130#define encode_savefh_maxsz (op_encode_hdr_maxsz)
131#define decode_savefh_maxsz (op_decode_hdr_maxsz)
132#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
133#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
134#define encode_fsinfo_maxsz (encode_getattr_maxsz)
135/* The 5 accounts for the PNFS attributes, and assumes that at most three
136 * layout types will be returned.
137 */
138#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
139 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
140#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
141#define decode_renew_maxsz (op_decode_hdr_maxsz)
142#define encode_setclientid_maxsz \
143 (op_encode_hdr_maxsz + \
144 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
145 /* client name */ \
146 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
147 1 /* sc_prog */ + \
148 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
149 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
150 1) /* sc_cb_ident */
151#define decode_setclientid_maxsz \
152 (op_decode_hdr_maxsz + \
153 2 /* clientid */ + \
154 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
155 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
156 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
157#define encode_setclientid_confirm_maxsz \
158 (op_encode_hdr_maxsz + \
159 3 + (NFS4_VERIFIER_SIZE >> 2))
160#define decode_setclientid_confirm_maxsz \
161 (op_decode_hdr_maxsz)
162#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
163#define decode_lookup_maxsz (op_decode_hdr_maxsz)
164#define encode_lookupp_maxsz (op_encode_hdr_maxsz)
165#define decode_lookupp_maxsz (op_decode_hdr_maxsz)
166#define encode_share_access_maxsz \
167 (2)
168#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
169#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
170#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
171#define encode_open_maxsz (op_encode_hdr_maxsz + \
172 2 + encode_share_access_maxsz + 2 + \
173 open_owner_id_maxsz + \
174 encode_opentype_maxsz + \
175 encode_claim_null_maxsz)
176#define decode_space_limit_maxsz (3)
177#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
178#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
179 decode_space_limit_maxsz + \
180 decode_ace_maxsz)
181#define decode_change_info_maxsz (5)
182#define decode_open_maxsz (op_decode_hdr_maxsz + \
183 decode_stateid_maxsz + \
184 decode_change_info_maxsz + 1 + \
185 nfs4_fattr_bitmap_maxsz + \
186 decode_delegation_maxsz)
187#define encode_open_confirm_maxsz \
188 (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 1)
190#define decode_open_confirm_maxsz \
191 (op_decode_hdr_maxsz + \
192 decode_stateid_maxsz)
193#define encode_open_downgrade_maxsz \
194 (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + 1 + \
196 encode_share_access_maxsz)
197#define decode_open_downgrade_maxsz \
198 (op_decode_hdr_maxsz + \
199 decode_stateid_maxsz)
200#define encode_close_maxsz (op_encode_hdr_maxsz + \
201 1 + encode_stateid_maxsz)
202#define decode_close_maxsz (op_decode_hdr_maxsz + \
203 decode_stateid_maxsz)
204#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
205 encode_stateid_maxsz + \
206 encode_attrs_maxsz)
207#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
208 nfs4_fattr_bitmap_maxsz)
209#define encode_read_maxsz (op_encode_hdr_maxsz + \
210 encode_stateid_maxsz + 3)
211#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
212#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
213 2 + encode_verifier_maxsz + 5 + \
214 nfs4_label_maxsz)
215#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
216 decode_verifier_maxsz)
217#define encode_readlink_maxsz (op_encode_hdr_maxsz)
218#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
219#define encode_write_maxsz (op_encode_hdr_maxsz + \
220 encode_stateid_maxsz + 4)
221#define decode_write_maxsz (op_decode_hdr_maxsz + \
222 2 + decode_verifier_maxsz)
223#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
224#define decode_commit_maxsz (op_decode_hdr_maxsz + \
225 decode_verifier_maxsz)
226#define encode_remove_maxsz (op_encode_hdr_maxsz + \
227 nfs4_name_maxsz)
228#define decode_remove_maxsz (op_decode_hdr_maxsz + \
229 decode_change_info_maxsz)
230#define encode_rename_maxsz (op_encode_hdr_maxsz + \
231 2 * nfs4_name_maxsz)
232#define decode_rename_maxsz (op_decode_hdr_maxsz + \
233 decode_change_info_maxsz + \
234 decode_change_info_maxsz)
235#define encode_link_maxsz (op_encode_hdr_maxsz + \
236 nfs4_name_maxsz)
237#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
238#define encode_lockowner_maxsz (7)
239#define encode_lock_maxsz (op_encode_hdr_maxsz + \
240 7 + \
241 1 + encode_stateid_maxsz + 1 + \
242 encode_lockowner_maxsz)
243#define decode_lock_denied_maxsz \
244 (8 + decode_lockowner_maxsz)
245#define decode_lock_maxsz (op_decode_hdr_maxsz + \
246 decode_lock_denied_maxsz)
247#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
248 encode_lockowner_maxsz)
249#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
250 decode_lock_denied_maxsz)
251#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
252 encode_stateid_maxsz + \
253 4)
254#define decode_locku_maxsz (op_decode_hdr_maxsz + \
255 decode_stateid_maxsz)
256#define encode_release_lockowner_maxsz \
257 (op_encode_hdr_maxsz + \
258 encode_lockowner_maxsz)
259#define decode_release_lockowner_maxsz \
260 (op_decode_hdr_maxsz)
261#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
262#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
263#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
264 1 + nfs4_name_maxsz + \
265 1 + \
266 nfs4_fattr_maxsz)
267#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
268#define encode_create_maxsz (op_encode_hdr_maxsz + \
269 1 + 2 + nfs4_name_maxsz + \
270 encode_attrs_maxsz)
271#define decode_create_maxsz (op_decode_hdr_maxsz + \
272 decode_change_info_maxsz + \
273 nfs4_fattr_bitmap_maxsz)
274#define encode_statfs_maxsz (encode_getattr_maxsz)
275#define decode_statfs_maxsz (decode_getattr_maxsz)
276#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
277#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
278#define encode_getacl_maxsz (encode_getattr_maxsz)
279#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
280 nfs4_fattr_bitmap_maxsz + 1)
281#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
282 encode_stateid_maxsz + 3)
283#define decode_setacl_maxsz (decode_setattr_maxsz)
284#define encode_fs_locations_maxsz \
285 (encode_getattr_maxsz)
286#define decode_fs_locations_maxsz \
287 (0)
288#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
289#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
290
291#if defined(CONFIG_NFS_V4_1)
292#define NFS4_MAX_MACHINE_NAME_LEN (64)
293#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
294 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
295
296#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
297 encode_verifier_maxsz + \
298 1 /* co_ownerid.len */ + \
299 /* eia_clientowner */ \
300 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
301 1 /* flags */ + \
302 1 /* spa_how */ + \
303 /* max is SP4_MACH_CRED (for now) */ + \
304 1 + NFS4_OP_MAP_NUM_WORDS + \
305 1 + NFS4_OP_MAP_NUM_WORDS + \
306 1 /* implementation id array of size 1 */ + \
307 1 /* nii_domain */ + \
308 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
309 1 /* nii_name */ + \
310 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
311 3 /* nii_date */)
312#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
313 2 /* eir_clientid */ + \
314 1 /* eir_sequenceid */ + \
315 1 /* eir_flags */ + \
316 1 /* spr_how */ + \
317 /* max is SP4_MACH_CRED (for now) */ + \
318 1 + NFS4_OP_MAP_NUM_WORDS + \
319 1 + NFS4_OP_MAP_NUM_WORDS + \
320 2 /* eir_server_owner.so_minor_id */ + \
321 /* eir_server_owner.so_major_id<> */ \
322 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
323 /* eir_server_scope<> */ \
324 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
325 1 /* eir_server_impl_id array length */ + \
326 1 /* nii_domain */ + \
327 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
328 1 /* nii_name */ + \
329 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
330 3 /* nii_date */)
331#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
332#define decode_channel_attrs_maxsz (6 + \
333 1 /* ca_rdma_ird.len */ + \
334 1 /* ca_rdma_ird */)
335#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
336 2 /* csa_clientid */ + \
337 1 /* csa_sequence */ + \
338 1 /* csa_flags */ + \
339 encode_channel_attrs_maxsz + \
340 encode_channel_attrs_maxsz + \
341 1 /* csa_cb_program */ + \
342 1 /* csa_sec_parms.len (1) */ + \
343 1 /* cb_secflavor (AUTH_SYS) */ + \
344 1 /* stamp */ + \
345 1 /* machinename.len */ + \
346 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
347 1 /* uid */ + \
348 1 /* gid */ + \
349 1 /* gids.len (0) */)
350#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
351 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
352 1 /* csr_sequence */ + \
353 1 /* csr_flags */ + \
354 decode_channel_attrs_maxsz + \
355 decode_channel_attrs_maxsz)
356#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
357 /* bctsa_sessid */ \
358 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
359 1 /* bctsa_dir */ + \
360 1 /* bctsa_use_conn_in_rdma_mode */)
361#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
362 /* bctsr_sessid */ \
363 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
364 1 /* bctsr_dir */ + \
365 1 /* bctsr_use_conn_in_rdma_mode */)
366#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
367#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
368#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
369#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
370#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
372#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
373 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
374#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
375#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
376#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
377 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
378 1 /* layout type */ + \
379 1 /* maxcount */ + \
380 1 /* bitmap size */ + \
381 1 /* notification bitmap length */ + \
382 1 /* notification bitmap, word 0 */)
383#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
384 1 /* layout type */ + \
385 1 /* opaque devaddr4 length */ + \
386 /* devaddr4 payload is read into page */ \
387 1 /* notification bitmap length */ + \
388 1 /* notification bitmap, word 0 */)
389#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
390 encode_stateid_maxsz)
391#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
392 decode_stateid_maxsz + \
393 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
394#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
395 2 /* offset */ + \
396 2 /* length */ + \
397 1 /* reclaim */ + \
398 encode_stateid_maxsz + \
399 1 /* new offset (true) */ + \
400 2 /* last byte written */ + \
401 1 /* nt_timechanged (false) */ + \
402 1 /* layoutupdate4 layout type */ + \
403 1 /* layoutupdate4 opaqueue len */)
404 /* the actual content of layoutupdate4 should
405 be allocated by drivers and spliced in
406 using xdr_write_pages */
407#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
408#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
409 encode_stateid_maxsz + \
410 1 + \
411 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
412#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
413 1 + decode_stateid_maxsz)
414#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
415#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
416#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
417 XDR_QUADLEN(NFS4_STATEID_SIZE))
418#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
419#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
420 XDR_QUADLEN(NFS4_STATEID_SIZE))
421#define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
422#else /* CONFIG_NFS_V4_1 */
423#define encode_sequence_maxsz 0
424#define decode_sequence_maxsz 0
425#define encode_layoutreturn_maxsz 0
426#define decode_layoutreturn_maxsz 0
427#endif /* CONFIG_NFS_V4_1 */
428
429#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
430#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
431#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
432 encode_sequence_maxsz + \
433 encode_putfh_maxsz + \
434 encode_read_maxsz)
435#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
436 decode_sequence_maxsz + \
437 decode_putfh_maxsz + \
438 decode_read_maxsz)
439#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
440 encode_sequence_maxsz + \
441 encode_putfh_maxsz + \
442 encode_readlink_maxsz)
443#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
444 decode_sequence_maxsz + \
445 decode_putfh_maxsz + \
446 decode_readlink_maxsz)
447#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
448 encode_sequence_maxsz + \
449 encode_putfh_maxsz + \
450 encode_readdir_maxsz)
451#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_readdir_maxsz)
455#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_write_maxsz + \
459 encode_getattr_maxsz)
460#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
461 decode_sequence_maxsz + \
462 decode_putfh_maxsz + \
463 decode_write_maxsz + \
464 decode_getattr_maxsz)
465#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
466 encode_sequence_maxsz + \
467 encode_putfh_maxsz + \
468 encode_commit_maxsz)
469#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
470 decode_sequence_maxsz + \
471 decode_putfh_maxsz + \
472 decode_commit_maxsz)
473#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
474 encode_sequence_maxsz + \
475 encode_putfh_maxsz + \
476 encode_open_maxsz + \
477 encode_access_maxsz + \
478 encode_getfh_maxsz + \
479 encode_getattr_maxsz)
480#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
481 decode_sequence_maxsz + \
482 decode_putfh_maxsz + \
483 decode_open_maxsz + \
484 decode_access_maxsz + \
485 decode_getfh_maxsz + \
486 decode_getattr_maxsz)
487#define NFS4_enc_open_confirm_sz \
488 (compound_encode_hdr_maxsz + \
489 encode_putfh_maxsz + \
490 encode_open_confirm_maxsz)
491#define NFS4_dec_open_confirm_sz \
492 (compound_decode_hdr_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_confirm_maxsz)
495#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
496 encode_sequence_maxsz + \
497 encode_putfh_maxsz + \
498 encode_open_maxsz + \
499 encode_access_maxsz + \
500 encode_getattr_maxsz)
501#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
502 decode_sequence_maxsz + \
503 decode_putfh_maxsz + \
504 decode_open_maxsz + \
505 decode_access_maxsz + \
506 decode_getattr_maxsz)
507#define NFS4_enc_open_downgrade_sz \
508 (compound_encode_hdr_maxsz + \
509 encode_sequence_maxsz + \
510 encode_putfh_maxsz + \
511 encode_layoutreturn_maxsz + \
512 encode_open_downgrade_maxsz)
513#define NFS4_dec_open_downgrade_sz \
514 (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_layoutreturn_maxsz + \
518 decode_open_downgrade_maxsz)
519#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
520 encode_sequence_maxsz + \
521 encode_putfh_maxsz + \
522 encode_layoutreturn_maxsz + \
523 encode_close_maxsz + \
524 encode_getattr_maxsz)
525#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
526 decode_sequence_maxsz + \
527 decode_putfh_maxsz + \
528 decode_layoutreturn_maxsz + \
529 decode_close_maxsz + \
530 decode_getattr_maxsz)
531#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
532 encode_sequence_maxsz + \
533 encode_putfh_maxsz + \
534 encode_setattr_maxsz + \
535 encode_getattr_maxsz)
536#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
537 decode_sequence_maxsz + \
538 decode_putfh_maxsz + \
539 decode_setattr_maxsz + \
540 decode_getattr_maxsz)
541#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
542 encode_sequence_maxsz + \
543 encode_putfh_maxsz + \
544 encode_fsinfo_maxsz)
545#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
546 decode_sequence_maxsz + \
547 decode_putfh_maxsz + \
548 decode_fsinfo_maxsz)
549#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
550 encode_renew_maxsz)
551#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
552 decode_renew_maxsz)
553#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
554 encode_setclientid_maxsz)
555#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
556 decode_setclientid_maxsz)
557#define NFS4_enc_setclientid_confirm_sz \
558 (compound_encode_hdr_maxsz + \
559 encode_setclientid_confirm_maxsz)
560#define NFS4_dec_setclientid_confirm_sz \
561 (compound_decode_hdr_maxsz + \
562 decode_setclientid_confirm_maxsz)
563#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
564 encode_sequence_maxsz + \
565 encode_putfh_maxsz + \
566 encode_lock_maxsz)
567#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
568 decode_sequence_maxsz + \
569 decode_putfh_maxsz + \
570 decode_lock_maxsz)
571#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
572 encode_sequence_maxsz + \
573 encode_putfh_maxsz + \
574 encode_lockt_maxsz)
575#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
576 decode_sequence_maxsz + \
577 decode_putfh_maxsz + \
578 decode_lockt_maxsz)
579#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
580 encode_sequence_maxsz + \
581 encode_putfh_maxsz + \
582 encode_locku_maxsz)
583#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
584 decode_sequence_maxsz + \
585 decode_putfh_maxsz + \
586 decode_locku_maxsz)
587#define NFS4_enc_release_lockowner_sz \
588 (compound_encode_hdr_maxsz + \
589 encode_lockowner_maxsz)
590#define NFS4_dec_release_lockowner_sz \
591 (compound_decode_hdr_maxsz + \
592 decode_lockowner_maxsz)
593#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
594 encode_sequence_maxsz + \
595 encode_putfh_maxsz + \
596 encode_access_maxsz + \
597 encode_getattr_maxsz)
598#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
599 decode_sequence_maxsz + \
600 decode_putfh_maxsz + \
601 decode_access_maxsz + \
602 decode_getattr_maxsz)
603#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
604 encode_sequence_maxsz + \
605 encode_putfh_maxsz + \
606 encode_getattr_maxsz + \
607 encode_renew_maxsz)
608#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
609 decode_sequence_maxsz + \
610 decode_putfh_maxsz + \
611 decode_getattr_maxsz + \
612 decode_renew_maxsz)
613#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
614 encode_sequence_maxsz + \
615 encode_putfh_maxsz + \
616 encode_lookup_maxsz + \
617 encode_getattr_maxsz + \
618 encode_getfh_maxsz)
619#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
620 decode_sequence_maxsz + \
621 decode_putfh_maxsz + \
622 decode_lookup_maxsz + \
623 decode_getattr_maxsz + \
624 decode_getfh_maxsz)
625#define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
626 encode_sequence_maxsz + \
627 encode_putfh_maxsz + \
628 encode_lookupp_maxsz + \
629 encode_getattr_maxsz + \
630 encode_getfh_maxsz)
631#define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
632 decode_sequence_maxsz + \
633 decode_putfh_maxsz + \
634 decode_lookupp_maxsz + \
635 decode_getattr_maxsz + \
636 decode_getfh_maxsz)
637#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putrootfh_maxsz + \
640 encode_getattr_maxsz + \
641 encode_getfh_maxsz)
642#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
643 decode_sequence_maxsz + \
644 decode_putrootfh_maxsz + \
645 decode_getattr_maxsz + \
646 decode_getfh_maxsz)
647#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
648 encode_sequence_maxsz + \
649 encode_putfh_maxsz + \
650 encode_remove_maxsz)
651#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
652 decode_sequence_maxsz + \
653 decode_putfh_maxsz + \
654 decode_remove_maxsz)
655#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
656 encode_sequence_maxsz + \
657 encode_putfh_maxsz + \
658 encode_savefh_maxsz + \
659 encode_putfh_maxsz + \
660 encode_rename_maxsz)
661#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
662 decode_sequence_maxsz + \
663 decode_putfh_maxsz + \
664 decode_savefh_maxsz + \
665 decode_putfh_maxsz + \
666 decode_rename_maxsz)
667#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
668 encode_sequence_maxsz + \
669 encode_putfh_maxsz + \
670 encode_savefh_maxsz + \
671 encode_putfh_maxsz + \
672 encode_link_maxsz + \
673 encode_restorefh_maxsz + \
674 encode_getattr_maxsz)
675#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_savefh_maxsz + \
679 decode_putfh_maxsz + \
680 decode_link_maxsz + \
681 decode_restorefh_maxsz + \
682 decode_getattr_maxsz)
683#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_putfh_maxsz + \
686 encode_symlink_maxsz + \
687 encode_getattr_maxsz + \
688 encode_getfh_maxsz)
689#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_symlink_maxsz + \
693 decode_getattr_maxsz + \
694 decode_getfh_maxsz)
695#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
696 encode_sequence_maxsz + \
697 encode_putfh_maxsz + \
698 encode_create_maxsz + \
699 encode_getfh_maxsz + \
700 encode_getattr_maxsz)
701#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_create_maxsz + \
705 decode_getfh_maxsz + \
706 decode_getattr_maxsz)
707#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
708 encode_sequence_maxsz + \
709 encode_putfh_maxsz + \
710 encode_getattr_maxsz)
711#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
712 decode_sequence_maxsz + \
713 decode_putfh_maxsz + \
714 decode_getattr_maxsz)
715#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
716 encode_sequence_maxsz + \
717 encode_putfh_maxsz + \
718 encode_statfs_maxsz)
719#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_putfh_maxsz + \
722 decode_statfs_maxsz)
723#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
724 encode_sequence_maxsz + \
725 encode_putfh_maxsz + \
726 encode_getattr_maxsz)
727#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
728 decode_sequence_maxsz + \
729 decode_putfh_maxsz + \
730 decode_getattr_maxsz)
731#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
732 encode_sequence_maxsz + \
733 encode_putfh_maxsz + \
734 encode_layoutreturn_maxsz + \
735 encode_delegreturn_maxsz + \
736 encode_getattr_maxsz)
737#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
738 decode_sequence_maxsz + \
739 decode_putfh_maxsz + \
740 decode_layoutreturn_maxsz + \
741 decode_delegreturn_maxsz + \
742 decode_getattr_maxsz)
743#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
744 encode_sequence_maxsz + \
745 encode_putfh_maxsz + \
746 encode_getacl_maxsz)
747#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
748 decode_sequence_maxsz + \
749 decode_putfh_maxsz + \
750 decode_getacl_maxsz)
751#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
752 encode_sequence_maxsz + \
753 encode_putfh_maxsz + \
754 encode_setacl_maxsz)
755#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
756 decode_sequence_maxsz + \
757 decode_putfh_maxsz + \
758 decode_setacl_maxsz)
759#define NFS4_enc_fs_locations_sz \
760 (compound_encode_hdr_maxsz + \
761 encode_sequence_maxsz + \
762 encode_putfh_maxsz + \
763 encode_lookup_maxsz + \
764 encode_fs_locations_maxsz + \
765 encode_renew_maxsz)
766#define NFS4_dec_fs_locations_sz \
767 (compound_decode_hdr_maxsz + \
768 decode_sequence_maxsz + \
769 decode_putfh_maxsz + \
770 decode_lookup_maxsz + \
771 decode_fs_locations_maxsz + \
772 decode_renew_maxsz)
773#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
774 encode_sequence_maxsz + \
775 encode_putfh_maxsz + \
776 encode_secinfo_maxsz)
777#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
778 decode_sequence_maxsz + \
779 decode_putfh_maxsz + \
780 decode_secinfo_maxsz)
781#define NFS4_enc_fsid_present_sz \
782 (compound_encode_hdr_maxsz + \
783 encode_sequence_maxsz + \
784 encode_putfh_maxsz + \
785 encode_getfh_maxsz + \
786 encode_renew_maxsz)
787#define NFS4_dec_fsid_present_sz \
788 (compound_decode_hdr_maxsz + \
789 decode_sequence_maxsz + \
790 decode_putfh_maxsz + \
791 decode_getfh_maxsz + \
792 decode_renew_maxsz)
793#if defined(CONFIG_NFS_V4_1)
794#define NFS4_enc_bind_conn_to_session_sz \
795 (compound_encode_hdr_maxsz + \
796 encode_bind_conn_to_session_maxsz)
797#define NFS4_dec_bind_conn_to_session_sz \
798 (compound_decode_hdr_maxsz + \
799 decode_bind_conn_to_session_maxsz)
800#define NFS4_enc_exchange_id_sz \
801 (compound_encode_hdr_maxsz + \
802 encode_exchange_id_maxsz)
803#define NFS4_dec_exchange_id_sz \
804 (compound_decode_hdr_maxsz + \
805 decode_exchange_id_maxsz)
806#define NFS4_enc_create_session_sz \
807 (compound_encode_hdr_maxsz + \
808 encode_create_session_maxsz)
809#define NFS4_dec_create_session_sz \
810 (compound_decode_hdr_maxsz + \
811 decode_create_session_maxsz)
812#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
813 encode_destroy_session_maxsz)
814#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
815 decode_destroy_session_maxsz)
816#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
817 encode_destroy_clientid_maxsz)
818#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
819 decode_destroy_clientid_maxsz)
820#define NFS4_enc_sequence_sz \
821 (compound_decode_hdr_maxsz + \
822 encode_sequence_maxsz)
823#define NFS4_dec_sequence_sz \
824 (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz)
826#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
827 encode_sequence_maxsz + \
828 encode_putrootfh_maxsz + \
829 encode_fsinfo_maxsz)
830#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
831 decode_sequence_maxsz + \
832 decode_putrootfh_maxsz + \
833 decode_fsinfo_maxsz)
834#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
835 encode_sequence_maxsz + \
836 encode_reclaim_complete_maxsz)
837#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
838 decode_sequence_maxsz + \
839 decode_reclaim_complete_maxsz)
840#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
841 encode_sequence_maxsz +\
842 encode_getdeviceinfo_maxsz)
843#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
844 decode_sequence_maxsz + \
845 decode_getdeviceinfo_maxsz)
846#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putfh_maxsz + \
849 encode_layoutget_maxsz)
850#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putfh_maxsz + \
853 decode_layoutget_maxsz)
854#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz +\
856 encode_putfh_maxsz + \
857 encode_layoutcommit_maxsz + \
858 encode_getattr_maxsz)
859#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
860 decode_sequence_maxsz + \
861 decode_putfh_maxsz + \
862 decode_layoutcommit_maxsz + \
863 decode_getattr_maxsz)
864#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
865 encode_sequence_maxsz + \
866 encode_putfh_maxsz + \
867 encode_layoutreturn_maxsz)
868#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
869 decode_sequence_maxsz + \
870 decode_putfh_maxsz + \
871 decode_layoutreturn_maxsz)
872#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
873 encode_sequence_maxsz + \
874 encode_putrootfh_maxsz +\
875 encode_secinfo_no_name_maxsz)
876#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
877 decode_sequence_maxsz + \
878 decode_putrootfh_maxsz + \
879 decode_secinfo_no_name_maxsz)
880#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
881 encode_sequence_maxsz + \
882 encode_test_stateid_maxsz)
883#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
884 decode_sequence_maxsz + \
885 decode_test_stateid_maxsz)
886#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
887 encode_sequence_maxsz + \
888 encode_free_stateid_maxsz)
889#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
890 decode_sequence_maxsz + \
891 decode_free_stateid_maxsz)
892
893const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
894 compound_encode_hdr_maxsz +
895 encode_sequence_maxsz +
896 encode_putfh_maxsz +
897 encode_getattr_maxsz) *
898 XDR_UNIT);
899
900const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
901 compound_decode_hdr_maxsz +
902 decode_sequence_maxsz +
903 decode_putfh_maxsz) *
904 XDR_UNIT);
905
906const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
907 compound_decode_hdr_maxsz +
908 decode_sequence_maxsz) *
909 XDR_UNIT);
910EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
911#endif /* CONFIG_NFS_V4_1 */
912
913static const umode_t nfs_type2fmt[] = {
914 [NF4BAD] = 0,
915 [NF4REG] = S_IFREG,
916 [NF4DIR] = S_IFDIR,
917 [NF4BLK] = S_IFBLK,
918 [NF4CHR] = S_IFCHR,
919 [NF4LNK] = S_IFLNK,
920 [NF4SOCK] = S_IFSOCK,
921 [NF4FIFO] = S_IFIFO,
922 [NF4ATTRDIR] = 0,
923 [NF4NAMEDATTR] = 0,
924};
925
926struct compound_hdr {
927 int32_t status;
928 uint32_t nops;
929 __be32 * nops_p;
930 uint32_t taglen;
931 char * tag;
932 uint32_t replen; /* expected reply words */
933 u32 minorversion;
934};
935
936static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
937{
938 __be32 *p = xdr_reserve_space(xdr, nbytes);
939 BUG_ON(!p);
940 return p;
941}
942
943static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
944{
945 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
946}
947
948static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
949{
950 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
951}
952
953static void encode_uint32(struct xdr_stream *xdr, u32 n)
954{
955 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
956}
957
958static void encode_uint64(struct xdr_stream *xdr, u64 n)
959{
960 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
961}
962
963static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
964 const __u32 *bitmap, size_t len)
965{
966 ssize_t ret;
967
968 /* Trim empty words */
969 while (len > 0 && bitmap[len-1] == 0)
970 len--;
971 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
972 if (WARN_ON_ONCE(ret < 0))
973 return ret;
974 return len;
975}
976
977static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
978 __u32 *res, size_t len)
979{
980 size_t i;
981 __u32 tmp;
982
983 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
984 len--;
985 for (i = len; i-- > 0;) {
986 tmp = bitmap[i] & mask[i];
987 res[i] = tmp;
988 }
989 return len;
990}
991
992static void encode_nfs4_seqid(struct xdr_stream *xdr,
993 const struct nfs_seqid *seqid)
994{
995 if (seqid != NULL)
996 encode_uint32(xdr, seqid->sequence->counter);
997 else
998 encode_uint32(xdr, 0);
999}
1000
1001static void encode_compound_hdr(struct xdr_stream *xdr,
1002 struct rpc_rqst *req,
1003 struct compound_hdr *hdr)
1004{
1005 __be32 *p;
1006 struct rpc_auth *auth = req->rq_cred->cr_auth;
1007
1008 /* initialize running count of expected bytes in reply.
1009 * NOTE: the replied tag SHOULD be the same is the one sent,
1010 * but this is not required as a MUST for the server to do so. */
1011 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1012
1013 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1014 encode_string(xdr, hdr->taglen, hdr->tag);
1015 p = reserve_space(xdr, 8);
1016 *p++ = cpu_to_be32(hdr->minorversion);
1017 hdr->nops_p = p;
1018 *p = cpu_to_be32(hdr->nops);
1019}
1020
1021static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1022 uint32_t replen,
1023 struct compound_hdr *hdr)
1024{
1025 encode_uint32(xdr, op);
1026 hdr->nops++;
1027 hdr->replen += replen;
1028}
1029
1030static void encode_nops(struct compound_hdr *hdr)
1031{
1032 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1033 *hdr->nops_p = htonl(hdr->nops);
1034}
1035
1036static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1037{
1038 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1039}
1040
1041static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1042{
1043 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1044}
1045
1046static __be32 *
1047xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1048{
1049 p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1050 *p++ = cpu_to_be32(t->tv_nsec);
1051 return p;
1052}
1053
1054static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1055 const struct nfs4_label *label,
1056 const umode_t *umask,
1057 const struct nfs_server *server,
1058 const uint32_t attrmask[])
1059{
1060 char owner_name[IDMAP_NAMESZ];
1061 char owner_group[IDMAP_NAMESZ];
1062 int owner_namelen = 0;
1063 int owner_grouplen = 0;
1064 __be32 *p;
1065 uint32_t len = 0;
1066 uint32_t bmval[3] = { 0 };
1067
1068 /*
1069 * We reserve enough space to write the entire attribute buffer at once.
1070 */
1071 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1072 bmval[0] |= FATTR4_WORD0_SIZE;
1073 len += 8;
1074 }
1075 if (iap->ia_valid & ATTR_MODE) {
1076 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1077 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1078 len += 8;
1079 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1080 bmval[1] |= FATTR4_WORD1_MODE;
1081 len += 4;
1082 }
1083 }
1084 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1085 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1086 if (owner_namelen < 0) {
1087 dprintk("nfs: couldn't resolve uid %d to string\n",
1088 from_kuid(&init_user_ns, iap->ia_uid));
1089 /* XXX */
1090 strcpy(owner_name, "nobody");
1091 owner_namelen = sizeof("nobody") - 1;
1092 /* goto out; */
1093 }
1094 bmval[1] |= FATTR4_WORD1_OWNER;
1095 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1096 }
1097 if ((iap->ia_valid & ATTR_GID) &&
1098 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1099 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1100 if (owner_grouplen < 0) {
1101 dprintk("nfs: couldn't resolve gid %d to string\n",
1102 from_kgid(&init_user_ns, iap->ia_gid));
1103 strcpy(owner_group, "nobody");
1104 owner_grouplen = sizeof("nobody") - 1;
1105 /* goto out; */
1106 }
1107 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1108 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1109 }
1110 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111 if (iap->ia_valid & ATTR_ATIME_SET) {
1112 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1113 len += 4 + (nfstime4_maxsz << 2);
1114 } else if (iap->ia_valid & ATTR_ATIME) {
1115 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1116 len += 4;
1117 }
1118 }
1119 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1120 if (iap->ia_valid & ATTR_MTIME_SET) {
1121 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1122 len += 4 + (nfstime4_maxsz << 2);
1123 } else if (iap->ia_valid & ATTR_MTIME) {
1124 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1125 len += 4;
1126 }
1127 }
1128
1129 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1130 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1131 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1132 }
1133
1134 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1135 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1136
1137 if (bmval[0] & FATTR4_WORD0_SIZE)
1138 p = xdr_encode_hyper(p, iap->ia_size);
1139 if (bmval[1] & FATTR4_WORD1_MODE)
1140 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1141 if (bmval[1] & FATTR4_WORD1_OWNER)
1142 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1143 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1144 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1145 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1146 if (iap->ia_valid & ATTR_ATIME_SET) {
1147 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1148 p = xdr_encode_nfstime4(p, &iap->ia_atime);
1149 } else
1150 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1151 }
1152 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1153 if (iap->ia_valid & ATTR_MTIME_SET) {
1154 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1155 p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1156 } else
1157 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1158 }
1159 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1160 *p++ = cpu_to_be32(label->lfs);
1161 *p++ = cpu_to_be32(label->pi);
1162 *p++ = cpu_to_be32(label->len);
1163 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1164 }
1165 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1166 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1167 *p++ = cpu_to_be32(*umask);
1168 }
1169
1170/* out: */
1171}
1172
1173static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1174{
1175 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1176 encode_uint32(xdr, access);
1177}
1178
1179static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1180{
1181 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1182 encode_nfs4_seqid(xdr, arg->seqid);
1183 encode_nfs4_stateid(xdr, &arg->stateid);
1184}
1185
1186static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1187{
1188 __be32 *p;
1189
1190 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1191 p = reserve_space(xdr, 12);
1192 p = xdr_encode_hyper(p, args->offset);
1193 *p = cpu_to_be32(args->count);
1194}
1195
1196static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1197{
1198 __be32 *p;
1199
1200 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1201 encode_uint32(xdr, create->ftype);
1202
1203 switch (create->ftype) {
1204 case NF4LNK:
1205 p = reserve_space(xdr, 4);
1206 *p = cpu_to_be32(create->u.symlink.len);
1207 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1208 create->u.symlink.len);
1209 xdr->buf->flags |= XDRBUF_WRITE;
1210 break;
1211
1212 case NF4BLK: case NF4CHR:
1213 p = reserve_space(xdr, 8);
1214 *p++ = cpu_to_be32(create->u.device.specdata1);
1215 *p = cpu_to_be32(create->u.device.specdata2);
1216 break;
1217
1218 default:
1219 break;
1220 }
1221
1222 encode_string(xdr, create->name->len, create->name->name);
1223 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1224 create->server, create->server->attr_bitmask);
1225}
1226
1227static void encode_getattr(struct xdr_stream *xdr,
1228 const __u32 *bitmap, const __u32 *mask, size_t len,
1229 struct compound_hdr *hdr)
1230{
1231 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1232
1233 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234 if (mask) {
1235 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1236 len = ARRAY_SIZE(masked_bitmap);
1237 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1238 bitmap = masked_bitmap;
1239 }
1240 xdr_encode_bitmap4(xdr, bitmap, len);
1241}
1242
1243static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1244{
1245 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1246 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1247}
1248
1249static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1250 const u32 *open_bitmap,
1251 struct compound_hdr *hdr)
1252{
1253 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1254}
1255
1256static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1257{
1258 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1259 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1260}
1261
1262static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1263{
1264 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1265 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1266}
1267
1268static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1269{
1270 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1271}
1272
1273static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1274{
1275 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1276 encode_string(xdr, name->len, name->name);
1277}
1278
1279static inline int nfs4_lock_type(struct file_lock *fl, int block)
1280{
1281 if (fl->fl_type == F_RDLCK)
1282 return block ? NFS4_READW_LT : NFS4_READ_LT;
1283 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1284}
1285
1286static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1287{
1288 if (fl->fl_end == OFFSET_MAX)
1289 return ~(uint64_t)0;
1290 return fl->fl_end - fl->fl_start + 1;
1291}
1292
1293static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1294{
1295 __be32 *p;
1296
1297 p = reserve_space(xdr, 32);
1298 p = xdr_encode_hyper(p, lowner->clientid);
1299 *p++ = cpu_to_be32(20);
1300 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1301 *p++ = cpu_to_be32(lowner->s_dev);
1302 xdr_encode_hyper(p, lowner->id);
1303}
1304
1305/*
1306 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1307 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1308 */
1309static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1310{
1311 __be32 *p;
1312
1313 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1314 p = reserve_space(xdr, 28);
1315 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1316 *p++ = cpu_to_be32(args->reclaim);
1317 p = xdr_encode_hyper(p, args->fl->fl_start);
1318 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1319 *p = cpu_to_be32(args->new_lock_owner);
1320 if (args->new_lock_owner){
1321 encode_nfs4_seqid(xdr, args->open_seqid);
1322 encode_nfs4_stateid(xdr, &args->open_stateid);
1323 encode_nfs4_seqid(xdr, args->lock_seqid);
1324 encode_lockowner(xdr, &args->lock_owner);
1325 }
1326 else {
1327 encode_nfs4_stateid(xdr, &args->lock_stateid);
1328 encode_nfs4_seqid(xdr, args->lock_seqid);
1329 }
1330}
1331
1332static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1333{
1334 __be32 *p;
1335
1336 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1337 p = reserve_space(xdr, 20);
1338 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1339 p = xdr_encode_hyper(p, args->fl->fl_start);
1340 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1341 encode_lockowner(xdr, &args->lock_owner);
1342}
1343
1344static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1345{
1346 __be32 *p;
1347
1348 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1349 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1350 encode_nfs4_seqid(xdr, args->seqid);
1351 encode_nfs4_stateid(xdr, &args->stateid);
1352 p = reserve_space(xdr, 16);
1353 p = xdr_encode_hyper(p, args->fl->fl_start);
1354 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1355}
1356
1357static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1358{
1359 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1360 encode_lockowner(xdr, lowner);
1361}
1362
1363static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1364{
1365 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1366 encode_string(xdr, name->len, name->name);
1367}
1368
1369static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1370{
1371 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1372}
1373
1374static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1375{
1376 __be32 *p;
1377
1378 p = reserve_space(xdr, 8);
1379 *p++ = cpu_to_be32(share_access);
1380 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1381}
1382
1383static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384{
1385 __be32 *p;
1386 /*
1387 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1388 * owner 4 = 32
1389 */
1390 encode_nfs4_seqid(xdr, arg->seqid);
1391 encode_share_access(xdr, arg->share_access);
1392 p = reserve_space(xdr, 36);
1393 p = xdr_encode_hyper(p, arg->clientid);
1394 *p++ = cpu_to_be32(24);
1395 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1396 *p++ = cpu_to_be32(arg->server->s_dev);
1397 *p++ = cpu_to_be32(arg->id.uniquifier);
1398 xdr_encode_hyper(p, arg->id.create_time);
1399}
1400
1401static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402{
1403 __be32 *p;
1404
1405 p = reserve_space(xdr, 4);
1406 switch(arg->createmode) {
1407 case NFS4_CREATE_UNCHECKED:
1408 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1410 arg->server, arg->server->attr_bitmask);
1411 break;
1412 case NFS4_CREATE_GUARDED:
1413 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1414 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1415 arg->server, arg->server->attr_bitmask);
1416 break;
1417 case NFS4_CREATE_EXCLUSIVE:
1418 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1419 encode_nfs4_verifier(xdr, &arg->u.verifier);
1420 break;
1421 case NFS4_CREATE_EXCLUSIVE4_1:
1422 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1423 encode_nfs4_verifier(xdr, &arg->u.verifier);
1424 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425 arg->server, arg->server->exclcreat_bitmask);
1426 }
1427}
1428
1429static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1430{
1431 __be32 *p;
1432
1433 p = reserve_space(xdr, 4);
1434 switch (arg->open_flags & O_CREAT) {
1435 case 0:
1436 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1437 break;
1438 default:
1439 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1440 encode_createmode(xdr, arg);
1441 }
1442}
1443
1444static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1445{
1446 __be32 *p;
1447
1448 p = reserve_space(xdr, 4);
1449 switch (delegation_type) {
1450 case 0:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1452 break;
1453 case FMODE_READ:
1454 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1455 break;
1456 case FMODE_WRITE|FMODE_READ:
1457 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1458 break;
1459 default:
1460 BUG();
1461 }
1462}
1463
1464static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1465{
1466 __be32 *p;
1467
1468 p = reserve_space(xdr, 4);
1469 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1470 encode_string(xdr, name->len, name->name);
1471}
1472
1473static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1474{
1475 __be32 *p;
1476
1477 p = reserve_space(xdr, 4);
1478 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1479 encode_delegation_type(xdr, type);
1480}
1481
1482static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1483{
1484 __be32 *p;
1485
1486 p = reserve_space(xdr, 4);
1487 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1488 encode_nfs4_stateid(xdr, stateid);
1489 encode_string(xdr, name->len, name->name);
1490}
1491
1492static inline void encode_claim_fh(struct xdr_stream *xdr)
1493{
1494 __be32 *p;
1495
1496 p = reserve_space(xdr, 4);
1497 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1498}
1499
1500static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1501{
1502 __be32 *p;
1503
1504 p = reserve_space(xdr, 4);
1505 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1506 encode_nfs4_stateid(xdr, stateid);
1507}
1508
1509static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1510{
1511 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1512 encode_openhdr(xdr, arg);
1513 encode_opentype(xdr, arg);
1514 switch (arg->claim) {
1515 case NFS4_OPEN_CLAIM_NULL:
1516 encode_claim_null(xdr, arg->name);
1517 break;
1518 case NFS4_OPEN_CLAIM_PREVIOUS:
1519 encode_claim_previous(xdr, arg->u.delegation_type);
1520 break;
1521 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1522 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1523 break;
1524 case NFS4_OPEN_CLAIM_FH:
1525 encode_claim_fh(xdr);
1526 break;
1527 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1528 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1529 break;
1530 default:
1531 BUG();
1532 }
1533}
1534
1535static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1536{
1537 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1538 encode_nfs4_stateid(xdr, arg->stateid);
1539 encode_nfs4_seqid(xdr, arg->seqid);
1540}
1541
1542static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1543{
1544 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1545 encode_nfs4_stateid(xdr, &arg->stateid);
1546 encode_nfs4_seqid(xdr, arg->seqid);
1547 encode_share_access(xdr, arg->share_access);
1548}
1549
1550static void
1551encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1552{
1553 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1554 encode_string(xdr, fh->size, fh->data);
1555}
1556
1557static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1558{
1559 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1560}
1561
1562static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1563 struct compound_hdr *hdr)
1564{
1565 __be32 *p;
1566
1567 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1568 encode_nfs4_stateid(xdr, &args->stateid);
1569
1570 p = reserve_space(xdr, 12);
1571 p = xdr_encode_hyper(p, args->offset);
1572 *p = cpu_to_be32(args->count);
1573}
1574
1575static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1576{
1577 uint32_t attrs[3] = {
1578 FATTR4_WORD0_RDATTR_ERROR,
1579 FATTR4_WORD1_MOUNTED_ON_FILEID,
1580 };
1581 uint32_t dircount = readdir->count >> 1;
1582 __be32 *p, verf[2];
1583 uint32_t attrlen = 0;
1584 unsigned int i;
1585
1586 if (readdir->plus) {
1587 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1588 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1589 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1590 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1591 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1592 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1593 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594 dircount >>= 1;
1595 }
1596 /* Use mounted_on_fileid only if the server supports it */
1597 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1598 attrs[0] |= FATTR4_WORD0_FILEID;
1599 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1600 attrs[i] &= readdir->bitmask[i];
1601 if (attrs[i] != 0)
1602 attrlen = i+1;
1603 }
1604
1605 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1606 encode_uint64(xdr, readdir->cookie);
1607 encode_nfs4_verifier(xdr, &readdir->verifier);
1608 p = reserve_space(xdr, 12 + (attrlen << 2));
1609 *p++ = cpu_to_be32(dircount);
1610 *p++ = cpu_to_be32(readdir->count);
1611 *p++ = cpu_to_be32(attrlen);
1612 for (i = 0; i < attrlen; i++)
1613 *p++ = cpu_to_be32(attrs[i]);
1614 memcpy(verf, readdir->verifier.data, sizeof(verf));
1615
1616 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1617 __func__,
1618 (unsigned long long)readdir->cookie,
1619 verf[0], verf[1],
1620 attrs[0] & readdir->bitmask[0],
1621 attrs[1] & readdir->bitmask[1],
1622 attrs[2] & readdir->bitmask[2]);
1623}
1624
1625static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1626{
1627 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1628}
1629
1630static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1631{
1632 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1633 encode_string(xdr, name->len, name->name);
1634}
1635
1636static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1637{
1638 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1639 encode_string(xdr, oldname->len, oldname->name);
1640 encode_string(xdr, newname->len, newname->name);
1641}
1642
1643static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1644 struct compound_hdr *hdr)
1645{
1646 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1647 encode_uint64(xdr, clid);
1648}
1649
1650static void
1651encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652{
1653 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1654}
1655
1656static void
1657encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1658 struct compound_hdr *hdr)
1659{
1660 __be32 *p;
1661
1662 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1663 encode_nfs4_stateid(xdr, &zero_stateid);
1664 p = reserve_space(xdr, 2*4);
1665 *p++ = cpu_to_be32(1);
1666 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1667 p = reserve_space(xdr, 4);
1668 *p = cpu_to_be32(arg->acl_len);
1669 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1670}
1671
1672static void
1673encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1674{
1675 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1676}
1677
1678static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1679{
1680 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1681 encode_nfs4_stateid(xdr, &arg->stateid);
1682 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1683 server->attr_bitmask);
1684}
1685
1686static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1687{
1688 __be32 *p;
1689
1690 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1691 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1692
1693 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1694 setclientid->sc_clnt->cl_owner_id);
1695 p = reserve_space(xdr, 4);
1696 *p = cpu_to_be32(setclientid->sc_prog);
1697 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1698 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1699 p = reserve_space(xdr, 4);
1700 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1701}
1702
1703static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1704{
1705 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1706 decode_setclientid_confirm_maxsz, hdr);
1707 encode_uint64(xdr, arg->clientid);
1708 encode_nfs4_verifier(xdr, &arg->confirm);
1709}
1710
1711static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1712 struct compound_hdr *hdr)
1713{
1714 __be32 *p;
1715
1716 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1717 encode_nfs4_stateid(xdr, &args->stateid);
1718
1719 p = reserve_space(xdr, 16);
1720 p = xdr_encode_hyper(p, args->offset);
1721 *p++ = cpu_to_be32(args->stable);
1722 *p = cpu_to_be32(args->count);
1723
1724 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1725}
1726
1727static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1728{
1729 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1730 encode_nfs4_stateid(xdr, stateid);
1731}
1732
1733static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1734{
1735 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1736 encode_string(xdr, name->len, name->name);
1737}
1738
1739#if defined(CONFIG_NFS_V4_1)
1740/* NFSv4.1 operations */
1741static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1742 const struct nfs41_bind_conn_to_session_args *args,
1743 struct compound_hdr *hdr)
1744{
1745 __be32 *p;
1746
1747 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1748 decode_bind_conn_to_session_maxsz, hdr);
1749 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1750 p = xdr_reserve_space(xdr, 8);
1751 *p++ = cpu_to_be32(args->dir);
1752 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1753}
1754
1755static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1756{
1757 unsigned int i;
1758 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1759 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1760 encode_uint32(xdr, op_map->u.words[i]);
1761}
1762
1763static void encode_exchange_id(struct xdr_stream *xdr,
1764 const struct nfs41_exchange_id_args *args,
1765 struct compound_hdr *hdr)
1766{
1767 __be32 *p;
1768 char impl_name[IMPL_NAME_LIMIT];
1769 int len = 0;
1770
1771 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1772 encode_nfs4_verifier(xdr, &args->verifier);
1773
1774 encode_string(xdr, strlen(args->client->cl_owner_id),
1775 args->client->cl_owner_id);
1776
1777 encode_uint32(xdr, args->flags);
1778 encode_uint32(xdr, args->state_protect.how);
1779
1780 switch (args->state_protect.how) {
1781 case SP4_NONE:
1782 break;
1783 case SP4_MACH_CRED:
1784 encode_op_map(xdr, &args->state_protect.enforce);
1785 encode_op_map(xdr, &args->state_protect.allow);
1786 break;
1787 default:
1788 WARN_ON_ONCE(1);
1789 break;
1790 }
1791
1792 if (send_implementation_id &&
1793 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1794 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1795 <= sizeof(impl_name) + 1)
1796 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1797 utsname()->sysname, utsname()->release,
1798 utsname()->version, utsname()->machine);
1799
1800 if (len > 0) {
1801 encode_uint32(xdr, 1); /* implementation id array length=1 */
1802
1803 encode_string(xdr,
1804 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1805 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1806 encode_string(xdr, len, impl_name);
1807 /* just send zeros for nii_date - the date is in nii_name */
1808 p = reserve_space(xdr, 12);
1809 p = xdr_encode_hyper(p, 0);
1810 *p = cpu_to_be32(0);
1811 } else
1812 encode_uint32(xdr, 0); /* implementation id array length=0 */
1813}
1814
1815static void encode_create_session(struct xdr_stream *xdr,
1816 const struct nfs41_create_session_args *args,
1817 struct compound_hdr *hdr)
1818{
1819 __be32 *p;
1820 struct nfs_client *clp = args->client;
1821 struct rpc_clnt *clnt = clp->cl_rpcclient;
1822 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1823 u32 max_resp_sz_cached;
1824
1825 /*
1826 * Assumes OPEN is the biggest non-idempotent compound.
1827 * 2 is the verifier.
1828 */
1829 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1830 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1831
1832 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1833 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1834 p = xdr_encode_hyper(p, args->clientid);
1835 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1836 *p++ = cpu_to_be32(args->flags); /*flags */
1837
1838 /* Fore Channel */
1839 *p++ = cpu_to_be32(0); /* header padding size */
1840 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1841 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1842 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1843 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1844 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1845 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1846
1847 /* Back Channel */
1848 *p++ = cpu_to_be32(0); /* header padding size */
1849 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1850 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1851 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1852 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1853 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1854 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1855
1856 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1857 *p++ = cpu_to_be32(1);
1858 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1859
1860 /* authsys_parms rfc1831 */
1861 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1862 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1863 *p++ = cpu_to_be32(0); /* UID */
1864 *p++ = cpu_to_be32(0); /* GID */
1865 *p = cpu_to_be32(0); /* No more gids */
1866}
1867
1868static void encode_destroy_session(struct xdr_stream *xdr,
1869 const struct nfs4_session *session,
1870 struct compound_hdr *hdr)
1871{
1872 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1873 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1874}
1875
1876static void encode_destroy_clientid(struct xdr_stream *xdr,
1877 uint64_t clientid,
1878 struct compound_hdr *hdr)
1879{
1880 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1881 encode_uint64(xdr, clientid);
1882}
1883
1884static void encode_reclaim_complete(struct xdr_stream *xdr,
1885 const struct nfs41_reclaim_complete_args *args,
1886 struct compound_hdr *hdr)
1887{
1888 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1889 encode_uint32(xdr, args->one_fs);
1890}
1891#endif /* CONFIG_NFS_V4_1 */
1892
1893static void encode_sequence(struct xdr_stream *xdr,
1894 const struct nfs4_sequence_args *args,
1895 struct compound_hdr *hdr)
1896{
1897#if defined(CONFIG_NFS_V4_1)
1898 struct nfs4_session *session;
1899 struct nfs4_slot_table *tp;
1900 struct nfs4_slot *slot = args->sa_slot;
1901 __be32 *p;
1902
1903 tp = slot->table;
1904 session = tp->session;
1905 if (!session)
1906 return;
1907
1908 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1909
1910 /*
1911 * Sessionid + seqid + slotid + max slotid + cache_this
1912 */
1913 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1914 "max_slotid=%d cache_this=%d\n",
1915 __func__,
1916 ((u32 *)session->sess_id.data)[0],
1917 ((u32 *)session->sess_id.data)[1],
1918 ((u32 *)session->sess_id.data)[2],
1919 ((u32 *)session->sess_id.data)[3],
1920 slot->seq_nr, slot->slot_nr,
1921 tp->highest_used_slotid, args->sa_cache_this);
1922 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1923 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1924 *p++ = cpu_to_be32(slot->seq_nr);
1925 *p++ = cpu_to_be32(slot->slot_nr);
1926 *p++ = cpu_to_be32(tp->highest_used_slotid);
1927 *p = cpu_to_be32(args->sa_cache_this);
1928#endif /* CONFIG_NFS_V4_1 */
1929}
1930
1931#ifdef CONFIG_NFS_V4_1
1932static void
1933encode_getdeviceinfo(struct xdr_stream *xdr,
1934 const struct nfs4_getdeviceinfo_args *args,
1935 struct compound_hdr *hdr)
1936{
1937 __be32 *p;
1938
1939 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1940 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1941 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942 NFS4_DEVICEID4_SIZE);
1943 *p++ = cpu_to_be32(args->pdev->layout_type);
1944 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1945
1946 p = reserve_space(xdr, 4 + 4);
1947 *p++ = cpu_to_be32(1); /* bitmap length */
1948 *p++ = cpu_to_be32(args->notify_types);
1949}
1950
1951static void
1952encode_layoutget(struct xdr_stream *xdr,
1953 const struct nfs4_layoutget_args *args,
1954 struct compound_hdr *hdr)
1955{
1956 __be32 *p;
1957
1958 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1959 p = reserve_space(xdr, 36);
1960 *p++ = cpu_to_be32(0); /* Signal layout available */
1961 *p++ = cpu_to_be32(args->type);
1962 *p++ = cpu_to_be32(args->range.iomode);
1963 p = xdr_encode_hyper(p, args->range.offset);
1964 p = xdr_encode_hyper(p, args->range.length);
1965 p = xdr_encode_hyper(p, args->minlength);
1966 encode_nfs4_stateid(xdr, &args->stateid);
1967 encode_uint32(xdr, args->maxcount);
1968
1969 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1970 __func__,
1971 args->type,
1972 args->range.iomode,
1973 (unsigned long)args->range.offset,
1974 (unsigned long)args->range.length,
1975 args->maxcount);
1976}
1977
1978static int
1979encode_layoutcommit(struct xdr_stream *xdr,
1980 struct inode *inode,
1981 const struct nfs4_layoutcommit_args *args,
1982 struct compound_hdr *hdr)
1983{
1984 __be32 *p;
1985
1986 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1987 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1988
1989 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1990 p = reserve_space(xdr, 20);
1991 /* Only whole file layouts */
1992 p = xdr_encode_hyper(p, 0); /* offset */
1993 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1994 *p = cpu_to_be32(0); /* reclaim */
1995 encode_nfs4_stateid(xdr, &args->stateid);
1996 if (args->lastbytewritten != U64_MAX) {
1997 p = reserve_space(xdr, 20);
1998 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1999 p = xdr_encode_hyper(p, args->lastbytewritten);
2000 } else {
2001 p = reserve_space(xdr, 12);
2002 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2003 }
2004 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2005 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2006
2007 encode_uint32(xdr, args->layoutupdate_len);
2008 if (args->layoutupdate_pages)
2009 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2010 args->layoutupdate_len);
2011
2012 return 0;
2013}
2014
2015static void
2016encode_layoutreturn(struct xdr_stream *xdr,
2017 const struct nfs4_layoutreturn_args *args,
2018 struct compound_hdr *hdr)
2019{
2020 __be32 *p;
2021
2022 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2023 p = reserve_space(xdr, 16);
2024 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2025 *p++ = cpu_to_be32(args->layout_type);
2026 *p++ = cpu_to_be32(args->range.iomode);
2027 *p = cpu_to_be32(RETURN_FILE);
2028 p = reserve_space(xdr, 16);
2029 p = xdr_encode_hyper(p, args->range.offset);
2030 p = xdr_encode_hyper(p, args->range.length);
2031 spin_lock(&args->inode->i_lock);
2032 encode_nfs4_stateid(xdr, &args->stateid);
2033 spin_unlock(&args->inode->i_lock);
2034 if (args->ld_private->ops && args->ld_private->ops->encode)
2035 args->ld_private->ops->encode(xdr, args, args->ld_private);
2036 else
2037 encode_uint32(xdr, 0);
2038}
2039
2040static int
2041encode_secinfo_no_name(struct xdr_stream *xdr,
2042 const struct nfs41_secinfo_no_name_args *args,
2043 struct compound_hdr *hdr)
2044{
2045 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2046 encode_uint32(xdr, args->style);
2047 return 0;
2048}
2049
2050static void encode_test_stateid(struct xdr_stream *xdr,
2051 const struct nfs41_test_stateid_args *args,
2052 struct compound_hdr *hdr)
2053{
2054 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2055 encode_uint32(xdr, 1);
2056 encode_nfs4_stateid(xdr, args->stateid);
2057}
2058
2059static void encode_free_stateid(struct xdr_stream *xdr,
2060 const struct nfs41_free_stateid_args *args,
2061 struct compound_hdr *hdr)
2062{
2063 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2064 encode_nfs4_stateid(xdr, &args->stateid);
2065}
2066#else
2067static inline void
2068encode_layoutreturn(struct xdr_stream *xdr,
2069 const struct nfs4_layoutreturn_args *args,
2070 struct compound_hdr *hdr)
2071{
2072}
2073#endif /* CONFIG_NFS_V4_1 */
2074
2075/*
2076 * END OF "GENERIC" ENCODE ROUTINES.
2077 */
2078
2079static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2080{
2081#if defined(CONFIG_NFS_V4_1)
2082 struct nfs4_session *session = args->sa_slot->table->session;
2083 if (session)
2084 return session->clp->cl_mvops->minor_version;
2085#endif /* CONFIG_NFS_V4_1 */
2086 return 0;
2087}
2088
2089/*
2090 * Encode an ACCESS request
2091 */
2092static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2093 const void *data)
2094{
2095 const struct nfs4_accessargs *args = data;
2096 struct compound_hdr hdr = {
2097 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098 };
2099
2100 encode_compound_hdr(xdr, req, &hdr);
2101 encode_sequence(xdr, &args->seq_args, &hdr);
2102 encode_putfh(xdr, args->fh, &hdr);
2103 encode_access(xdr, args->access, &hdr);
2104 if (args->bitmask)
2105 encode_getfattr(xdr, args->bitmask, &hdr);
2106 encode_nops(&hdr);
2107}
2108
2109/*
2110 * Encode LOOKUP request
2111 */
2112static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 const void *data)
2114{
2115 const struct nfs4_lookup_arg *args = data;
2116 struct compound_hdr hdr = {
2117 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118 };
2119
2120 encode_compound_hdr(xdr, req, &hdr);
2121 encode_sequence(xdr, &args->seq_args, &hdr);
2122 encode_putfh(xdr, args->dir_fh, &hdr);
2123 encode_lookup(xdr, args->name, &hdr);
2124 encode_getfh(xdr, &hdr);
2125 encode_getfattr(xdr, args->bitmask, &hdr);
2126 encode_nops(&hdr);
2127}
2128
2129/*
2130 * Encode LOOKUPP request
2131 */
2132static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2133 const void *data)
2134{
2135 const struct nfs4_lookupp_arg *args = data;
2136 struct compound_hdr hdr = {
2137 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138 };
2139
2140 encode_compound_hdr(xdr, req, &hdr);
2141 encode_sequence(xdr, &args->seq_args, &hdr);
2142 encode_putfh(xdr, args->fh, &hdr);
2143 encode_lookupp(xdr, &hdr);
2144 encode_getfh(xdr, &hdr);
2145 encode_getfattr(xdr, args->bitmask, &hdr);
2146 encode_nops(&hdr);
2147}
2148
2149/*
2150 * Encode LOOKUP_ROOT request
2151 */
2152static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2153 struct xdr_stream *xdr,
2154 const void *data)
2155{
2156 const struct nfs4_lookup_root_arg *args = data;
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_putrootfh(xdr, &hdr);
2164 encode_getfh(xdr, &hdr);
2165 encode_getfattr(xdr, args->bitmask, &hdr);
2166 encode_nops(&hdr);
2167}
2168
2169/*
2170 * Encode REMOVE request
2171 */
2172static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2173 const void *data)
2174{
2175 const struct nfs_removeargs *args = data;
2176 struct compound_hdr hdr = {
2177 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2178 };
2179
2180 encode_compound_hdr(xdr, req, &hdr);
2181 encode_sequence(xdr, &args->seq_args, &hdr);
2182 encode_putfh(xdr, args->fh, &hdr);
2183 encode_remove(xdr, &args->name, &hdr);
2184 encode_nops(&hdr);
2185}
2186
2187/*
2188 * Encode RENAME request
2189 */
2190static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2191 const void *data)
2192{
2193 const struct nfs_renameargs *args = data;
2194 struct compound_hdr hdr = {
2195 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196 };
2197
2198 encode_compound_hdr(xdr, req, &hdr);
2199 encode_sequence(xdr, &args->seq_args, &hdr);
2200 encode_putfh(xdr, args->old_dir, &hdr);
2201 encode_savefh(xdr, &hdr);
2202 encode_putfh(xdr, args->new_dir, &hdr);
2203 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2204 encode_nops(&hdr);
2205}
2206
2207/*
2208 * Encode LINK request
2209 */
2210static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2211 const void *data)
2212{
2213 const struct nfs4_link_arg *args = data;
2214 struct compound_hdr hdr = {
2215 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2216 };
2217
2218 encode_compound_hdr(xdr, req, &hdr);
2219 encode_sequence(xdr, &args->seq_args, &hdr);
2220 encode_putfh(xdr, args->fh, &hdr);
2221 encode_savefh(xdr, &hdr);
2222 encode_putfh(xdr, args->dir_fh, &hdr);
2223 encode_link(xdr, args->name, &hdr);
2224 encode_restorefh(xdr, &hdr);
2225 encode_getfattr(xdr, args->bitmask, &hdr);
2226 encode_nops(&hdr);
2227}
2228
2229/*
2230 * Encode CREATE request
2231 */
2232static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2233 const void *data)
2234{
2235 const struct nfs4_create_arg *args = data;
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->dir_fh, &hdr);
2243 encode_create(xdr, args, &hdr);
2244 encode_getfh(xdr, &hdr);
2245 encode_getfattr(xdr, args->bitmask, &hdr);
2246 encode_nops(&hdr);
2247}
2248
2249/*
2250 * Encode SYMLINK request
2251 */
2252static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2253 const void *data)
2254{
2255 const struct nfs4_create_arg *args = data;
2256
2257 nfs4_xdr_enc_create(req, xdr, args);
2258}
2259
2260/*
2261 * Encode GETATTR request
2262 */
2263static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2264 const void *data)
2265{
2266 const struct nfs4_getattr_arg *args = data;
2267 struct compound_hdr hdr = {
2268 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2269 };
2270
2271 encode_compound_hdr(xdr, req, &hdr);
2272 encode_sequence(xdr, &args->seq_args, &hdr);
2273 encode_putfh(xdr, args->fh, &hdr);
2274 encode_getfattr(xdr, args->bitmask, &hdr);
2275 encode_nops(&hdr);
2276}
2277
2278/*
2279 * Encode a CLOSE request
2280 */
2281static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2282 const void *data)
2283{
2284 const struct nfs_closeargs *args = data;
2285 struct compound_hdr hdr = {
2286 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2287 };
2288
2289 encode_compound_hdr(xdr, req, &hdr);
2290 encode_sequence(xdr, &args->seq_args, &hdr);
2291 encode_putfh(xdr, args->fh, &hdr);
2292 if (args->lr_args)
2293 encode_layoutreturn(xdr, args->lr_args, &hdr);
2294 if (args->bitmask != NULL)
2295 encode_getfattr(xdr, args->bitmask, &hdr);
2296 encode_close(xdr, args, &hdr);
2297 encode_nops(&hdr);
2298}
2299
2300/*
2301 * Encode an OPEN request
2302 */
2303static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2304 const void *data)
2305{
2306 const struct nfs_openargs *args = data;
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 encode_open(xdr, args, &hdr);
2315 encode_getfh(xdr, &hdr);
2316 if (args->access)
2317 encode_access(xdr, args->access, &hdr);
2318 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2319 encode_nops(&hdr);
2320}
2321
2322/*
2323 * Encode an OPEN_CONFIRM request
2324 */
2325static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2326 struct xdr_stream *xdr,
2327 const void *data)
2328{
2329 const struct nfs_open_confirmargs *args = data;
2330 struct compound_hdr hdr = {
2331 .nops = 0,
2332 };
2333
2334 encode_compound_hdr(xdr, req, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open_confirm(xdr, args, &hdr);
2337 encode_nops(&hdr);
2338}
2339
2340/*
2341 * Encode an OPEN request with no attributes.
2342 */
2343static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2344 struct xdr_stream *xdr,
2345 const void *data)
2346{
2347 const struct nfs_openargs *args = data;
2348 struct compound_hdr hdr = {
2349 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350 };
2351
2352 encode_compound_hdr(xdr, req, &hdr);
2353 encode_sequence(xdr, &args->seq_args, &hdr);
2354 encode_putfh(xdr, args->fh, &hdr);
2355 encode_open(xdr, args, &hdr);
2356 if (args->access)
2357 encode_access(xdr, args->access, &hdr);
2358 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2359 encode_nops(&hdr);
2360}
2361
2362/*
2363 * Encode an OPEN_DOWNGRADE request
2364 */
2365static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2366 struct xdr_stream *xdr,
2367 const void *data)
2368{
2369 const struct nfs_closeargs *args = data;
2370 struct compound_hdr hdr = {
2371 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372 };
2373
2374 encode_compound_hdr(xdr, req, &hdr);
2375 encode_sequence(xdr, &args->seq_args, &hdr);
2376 encode_putfh(xdr, args->fh, &hdr);
2377 if (args->lr_args)
2378 encode_layoutreturn(xdr, args->lr_args, &hdr);
2379 encode_open_downgrade(xdr, args, &hdr);
2380 encode_nops(&hdr);
2381}
2382
2383/*
2384 * Encode a LOCK request
2385 */
2386static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2387 const void *data)
2388{
2389 const struct nfs_lock_args *args = data;
2390 struct compound_hdr hdr = {
2391 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392 };
2393
2394 encode_compound_hdr(xdr, req, &hdr);
2395 encode_sequence(xdr, &args->seq_args, &hdr);
2396 encode_putfh(xdr, args->fh, &hdr);
2397 encode_lock(xdr, args, &hdr);
2398 encode_nops(&hdr);
2399}
2400
2401/*
2402 * Encode a LOCKT request
2403 */
2404static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2405 const void *data)
2406{
2407 const struct nfs_lockt_args *args = data;
2408 struct compound_hdr hdr = {
2409 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2410 };
2411
2412 encode_compound_hdr(xdr, req, &hdr);
2413 encode_sequence(xdr, &args->seq_args, &hdr);
2414 encode_putfh(xdr, args->fh, &hdr);
2415 encode_lockt(xdr, args, &hdr);
2416 encode_nops(&hdr);
2417}
2418
2419/*
2420 * Encode a LOCKU request
2421 */
2422static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2423 const void *data)
2424{
2425 const struct nfs_locku_args *args = data;
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_locku(xdr, args, &hdr);
2434 encode_nops(&hdr);
2435}
2436
2437static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2438 struct xdr_stream *xdr,
2439 const void *data)
2440{
2441 const struct nfs_release_lockowner_args *args = data;
2442 struct compound_hdr hdr = {
2443 .minorversion = 0,
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2448 encode_nops(&hdr);
2449}
2450
2451/*
2452 * Encode a READLINK request
2453 */
2454static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 const void *data)
2456{
2457 const struct nfs4_readlink *args = data;
2458 struct compound_hdr hdr = {
2459 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460 };
2461
2462 encode_compound_hdr(xdr, req, &hdr);
2463 encode_sequence(xdr, &args->seq_args, &hdr);
2464 encode_putfh(xdr, args->fh, &hdr);
2465 encode_readlink(xdr, args, req, &hdr);
2466
2467 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2468 args->pgbase, args->pglen);
2469 encode_nops(&hdr);
2470}
2471
2472/*
2473 * Encode a READDIR request
2474 */
2475static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2476 const void *data)
2477{
2478 const struct nfs4_readdir_arg *args = data;
2479 struct compound_hdr hdr = {
2480 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481 };
2482
2483 encode_compound_hdr(xdr, req, &hdr);
2484 encode_sequence(xdr, &args->seq_args, &hdr);
2485 encode_putfh(xdr, args->fh, &hdr);
2486 encode_readdir(xdr, args, req, &hdr);
2487
2488 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2489 args->pgbase, args->count);
2490 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2491 __func__, hdr.replen << 2, args->pages,
2492 args->pgbase, args->count);
2493 encode_nops(&hdr);
2494}
2495
2496/*
2497 * Encode a READ request
2498 */
2499static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2500 const void *data)
2501{
2502 const struct nfs_pgio_args *args = data;
2503 struct compound_hdr hdr = {
2504 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2505 };
2506
2507 encode_compound_hdr(xdr, req, &hdr);
2508 encode_sequence(xdr, &args->seq_args, &hdr);
2509 encode_putfh(xdr, args->fh, &hdr);
2510 encode_read(xdr, args, &hdr);
2511
2512 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2513 args->pages, args->pgbase, args->count);
2514 req->rq_rcv_buf.flags |= XDRBUF_READ;
2515 encode_nops(&hdr);
2516}
2517
2518/*
2519 * Encode an SETATTR request
2520 */
2521static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2522 const void *data)
2523{
2524 const struct nfs_setattrargs *args = data;
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_setattr(xdr, args, args->server, &hdr);
2533 encode_getfattr(xdr, args->bitmask, &hdr);
2534 encode_nops(&hdr);
2535}
2536
2537/*
2538 * Encode a GETACL request
2539 */
2540static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2541 const void *data)
2542{
2543 const struct nfs_getaclargs *args = data;
2544 struct compound_hdr hdr = {
2545 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546 };
2547 const __u32 nfs4_acl_bitmap[1] = {
2548 [0] = FATTR4_WORD0_ACL,
2549 };
2550 uint32_t replen;
2551
2552 encode_compound_hdr(xdr, req, &hdr);
2553 encode_sequence(xdr, &args->seq_args, &hdr);
2554 encode_putfh(xdr, args->fh, &hdr);
2555 replen = hdr.replen + op_decode_hdr_maxsz;
2556 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2557 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2558
2559 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2560 args->acl_pages, 0, args->acl_len);
2561
2562 encode_nops(&hdr);
2563}
2564
2565/*
2566 * Encode a WRITE request
2567 */
2568static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2569 const void *data)
2570{
2571 const struct nfs_pgio_args *args = data;
2572 struct compound_hdr hdr = {
2573 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574 };
2575
2576 encode_compound_hdr(xdr, req, &hdr);
2577 encode_sequence(xdr, &args->seq_args, &hdr);
2578 encode_putfh(xdr, args->fh, &hdr);
2579 encode_write(xdr, args, &hdr);
2580 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2581 if (args->bitmask)
2582 encode_getfattr(xdr, args->bitmask, &hdr);
2583 encode_nops(&hdr);
2584}
2585
2586/*
2587 * a COMMIT request
2588 */
2589static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2590 const void *data)
2591{
2592 const struct nfs_commitargs *args = data;
2593 struct compound_hdr hdr = {
2594 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2595 };
2596
2597 encode_compound_hdr(xdr, req, &hdr);
2598 encode_sequence(xdr, &args->seq_args, &hdr);
2599 encode_putfh(xdr, args->fh, &hdr);
2600 encode_commit(xdr, args, &hdr);
2601 encode_nops(&hdr);
2602}
2603
2604/*
2605 * FSINFO request
2606 */
2607static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2608 const void *data)
2609{
2610 const struct nfs4_fsinfo_arg *args = data;
2611 struct compound_hdr hdr = {
2612 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613 };
2614
2615 encode_compound_hdr(xdr, req, &hdr);
2616 encode_sequence(xdr, &args->seq_args, &hdr);
2617 encode_putfh(xdr, args->fh, &hdr);
2618 encode_fsinfo(xdr, args->bitmask, &hdr);
2619 encode_nops(&hdr);
2620}
2621
2622/*
2623 * a PATHCONF request
2624 */
2625static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2626 const void *data)
2627{
2628 const struct nfs4_pathconf_arg *args = data;
2629 struct compound_hdr hdr = {
2630 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631 };
2632
2633 encode_compound_hdr(xdr, req, &hdr);
2634 encode_sequence(xdr, &args->seq_args, &hdr);
2635 encode_putfh(xdr, args->fh, &hdr);
2636 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2637 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2638 encode_nops(&hdr);
2639}
2640
2641/*
2642 * a STATFS request
2643 */
2644static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2645 const void *data)
2646{
2647 const struct nfs4_statfs_arg *args = data;
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->fh, &hdr);
2655 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2656 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2657 encode_nops(&hdr);
2658}
2659
2660/*
2661 * GETATTR_BITMAP request
2662 */
2663static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 const void *data)
2666{
2667 const struct nfs4_server_caps_arg *args = data;
2668 const u32 *bitmask = args->bitmask;
2669 struct compound_hdr hdr = {
2670 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671 };
2672
2673 encode_compound_hdr(xdr, req, &hdr);
2674 encode_sequence(xdr, &args->seq_args, &hdr);
2675 encode_putfh(xdr, args->fhandle, &hdr);
2676 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2677 encode_nops(&hdr);
2678}
2679
2680/*
2681 * a RENEW request
2682 */
2683static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2684 const void *data)
2685
2686{
2687 const struct nfs_client *clp = data;
2688 struct compound_hdr hdr = {
2689 .nops = 0,
2690 };
2691
2692 encode_compound_hdr(xdr, req, &hdr);
2693 encode_renew(xdr, clp->cl_clientid, &hdr);
2694 encode_nops(&hdr);
2695}
2696
2697/*
2698 * a SETCLIENTID request
2699 */
2700static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2701 struct xdr_stream *xdr,
2702 const void *data)
2703{
2704 const struct nfs4_setclientid *sc = data;
2705 struct compound_hdr hdr = {
2706 .nops = 0,
2707 };
2708
2709 encode_compound_hdr(xdr, req, &hdr);
2710 encode_setclientid(xdr, sc, &hdr);
2711 encode_nops(&hdr);
2712}
2713
2714/*
2715 * a SETCLIENTID_CONFIRM request
2716 */
2717static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2718 struct xdr_stream *xdr,
2719 const void *data)
2720{
2721 const struct nfs4_setclientid_res *arg = data;
2722 struct compound_hdr hdr = {
2723 .nops = 0,
2724 };
2725
2726 encode_compound_hdr(xdr, req, &hdr);
2727 encode_setclientid_confirm(xdr, arg, &hdr);
2728 encode_nops(&hdr);
2729}
2730
2731/*
2732 * DELEGRETURN request
2733 */
2734static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2735 struct xdr_stream *xdr,
2736 const void *data)
2737{
2738 const struct nfs4_delegreturnargs *args = data;
2739 struct compound_hdr hdr = {
2740 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2741 };
2742
2743 encode_compound_hdr(xdr, req, &hdr);
2744 encode_sequence(xdr, &args->seq_args, &hdr);
2745 encode_putfh(xdr, args->fhandle, &hdr);
2746 if (args->lr_args)
2747 encode_layoutreturn(xdr, args->lr_args, &hdr);
2748 if (args->bitmask)
2749 encode_getfattr(xdr, args->bitmask, &hdr);
2750 encode_delegreturn(xdr, args->stateid, &hdr);
2751 encode_nops(&hdr);
2752}
2753
2754/*
2755 * Encode FS_LOCATIONS request
2756 */
2757static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2758 struct xdr_stream *xdr,
2759 const void *data)
2760{
2761 const struct nfs4_fs_locations_arg *args = data;
2762 struct compound_hdr hdr = {
2763 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2764 };
2765 uint32_t replen;
2766
2767 encode_compound_hdr(xdr, req, &hdr);
2768 encode_sequence(xdr, &args->seq_args, &hdr);
2769 if (args->migration) {
2770 encode_putfh(xdr, args->fh, &hdr);
2771 replen = hdr.replen;
2772 encode_fs_locations(xdr, args->bitmask, &hdr);
2773 if (args->renew)
2774 encode_renew(xdr, args->clientid, &hdr);
2775 } else {
2776 encode_putfh(xdr, args->dir_fh, &hdr);
2777 encode_lookup(xdr, args->name, &hdr);
2778 replen = hdr.replen;
2779 encode_fs_locations(xdr, args->bitmask, &hdr);
2780 }
2781
2782 /* Set up reply kvec to capture returned fs_locations array. */
2783 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2784 (struct page **)&args->page, 0, PAGE_SIZE);
2785 encode_nops(&hdr);
2786}
2787
2788/*
2789 * Encode SECINFO request
2790 */
2791static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2792 struct xdr_stream *xdr,
2793 const void *data)
2794{
2795 const struct nfs4_secinfo_arg *args = data;
2796 struct compound_hdr hdr = {
2797 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798 };
2799
2800 encode_compound_hdr(xdr, req, &hdr);
2801 encode_sequence(xdr, &args->seq_args, &hdr);
2802 encode_putfh(xdr, args->dir_fh, &hdr);
2803 encode_secinfo(xdr, args->name, &hdr);
2804 encode_nops(&hdr);
2805}
2806
2807/*
2808 * Encode FSID_PRESENT request
2809 */
2810static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2811 struct xdr_stream *xdr,
2812 const void *data)
2813{
2814 const struct nfs4_fsid_present_arg *args = data;
2815 struct compound_hdr hdr = {
2816 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2817 };
2818
2819 encode_compound_hdr(xdr, req, &hdr);
2820 encode_sequence(xdr, &args->seq_args, &hdr);
2821 encode_putfh(xdr, args->fh, &hdr);
2822 encode_getfh(xdr, &hdr);
2823 if (args->renew)
2824 encode_renew(xdr, args->clientid, &hdr);
2825 encode_nops(&hdr);
2826}
2827
2828#if defined(CONFIG_NFS_V4_1)
2829/*
2830 * BIND_CONN_TO_SESSION request
2831 */
2832static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2833 struct xdr_stream *xdr,
2834 const void *data)
2835{
2836 const struct nfs41_bind_conn_to_session_args *args = data;
2837 struct compound_hdr hdr = {
2838 .minorversion = args->client->cl_mvops->minor_version,
2839 };
2840
2841 encode_compound_hdr(xdr, req, &hdr);
2842 encode_bind_conn_to_session(xdr, args, &hdr);
2843 encode_nops(&hdr);
2844}
2845
2846/*
2847 * EXCHANGE_ID request
2848 */
2849static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2850 struct xdr_stream *xdr,
2851 const void *data)
2852{
2853 const struct nfs41_exchange_id_args *args = data;
2854 struct compound_hdr hdr = {
2855 .minorversion = args->client->cl_mvops->minor_version,
2856 };
2857
2858 encode_compound_hdr(xdr, req, &hdr);
2859 encode_exchange_id(xdr, args, &hdr);
2860 encode_nops(&hdr);
2861}
2862
2863/*
2864 * a CREATE_SESSION request
2865 */
2866static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2867 struct xdr_stream *xdr,
2868 const void *data)
2869{
2870 const struct nfs41_create_session_args *args = data;
2871 struct compound_hdr hdr = {
2872 .minorversion = args->client->cl_mvops->minor_version,
2873 };
2874
2875 encode_compound_hdr(xdr, req, &hdr);
2876 encode_create_session(xdr, args, &hdr);
2877 encode_nops(&hdr);
2878}
2879
2880/*
2881 * a DESTROY_SESSION request
2882 */
2883static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2884 struct xdr_stream *xdr,
2885 const void *data)
2886{
2887 const struct nfs4_session *session = data;
2888 struct compound_hdr hdr = {
2889 .minorversion = session->clp->cl_mvops->minor_version,
2890 };
2891
2892 encode_compound_hdr(xdr, req, &hdr);
2893 encode_destroy_session(xdr, session, &hdr);
2894 encode_nops(&hdr);
2895}
2896
2897/*
2898 * a DESTROY_CLIENTID request
2899 */
2900static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2901 struct xdr_stream *xdr,
2902 const void *data)
2903{
2904 const struct nfs_client *clp = data;
2905 struct compound_hdr hdr = {
2906 .minorversion = clp->cl_mvops->minor_version,
2907 };
2908
2909 encode_compound_hdr(xdr, req, &hdr);
2910 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2911 encode_nops(&hdr);
2912}
2913
2914/*
2915 * a SEQUENCE request
2916 */
2917static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2918 const void *data)
2919{
2920 const struct nfs4_sequence_args *args = data;
2921 struct compound_hdr hdr = {
2922 .minorversion = nfs4_xdr_minorversion(args),
2923 };
2924
2925 encode_compound_hdr(xdr, req, &hdr);
2926 encode_sequence(xdr, args, &hdr);
2927 encode_nops(&hdr);
2928}
2929
2930/*
2931 * a GET_LEASE_TIME request
2932 */
2933static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2934 struct xdr_stream *xdr,
2935 const void *data)
2936{
2937 const struct nfs4_get_lease_time_args *args = data;
2938 struct compound_hdr hdr = {
2939 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2940 };
2941 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2942
2943 encode_compound_hdr(xdr, req, &hdr);
2944 encode_sequence(xdr, &args->la_seq_args, &hdr);
2945 encode_putrootfh(xdr, &hdr);
2946 encode_fsinfo(xdr, lease_bitmap, &hdr);
2947 encode_nops(&hdr);
2948}
2949
2950/*
2951 * a RECLAIM_COMPLETE request
2952 */
2953static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2954 struct xdr_stream *xdr,
2955 const void *data)
2956{
2957 const struct nfs41_reclaim_complete_args *args = data;
2958 struct compound_hdr hdr = {
2959 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2960 };
2961
2962 encode_compound_hdr(xdr, req, &hdr);
2963 encode_sequence(xdr, &args->seq_args, &hdr);
2964 encode_reclaim_complete(xdr, args, &hdr);
2965 encode_nops(&hdr);
2966}
2967
2968/*
2969 * Encode GETDEVICEINFO request
2970 */
2971static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2972 struct xdr_stream *xdr,
2973 const void *data)
2974{
2975 const struct nfs4_getdeviceinfo_args *args = data;
2976 struct compound_hdr hdr = {
2977 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2978 };
2979
2980 encode_compound_hdr(xdr, req, &hdr);
2981 encode_sequence(xdr, &args->seq_args, &hdr);
2982 encode_getdeviceinfo(xdr, args, &hdr);
2983
2984 /* set up reply kvec. Subtract notification bitmap max size (2)
2985 * so that notification bitmap is put in xdr_buf tail */
2986 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2987 args->pdev->pages, args->pdev->pgbase,
2988 args->pdev->pglen);
2989
2990 encode_nops(&hdr);
2991}
2992
2993/*
2994 * Encode LAYOUTGET request
2995 */
2996static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2997 struct xdr_stream *xdr,
2998 const void *data)
2999{
3000 const struct nfs4_layoutget_args *args = data;
3001 struct compound_hdr hdr = {
3002 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3003 };
3004
3005 encode_compound_hdr(xdr, req, &hdr);
3006 encode_sequence(xdr, &args->seq_args, &hdr);
3007 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3008 encode_layoutget(xdr, args, &hdr);
3009
3010 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3011 args->layout.pages, 0, args->layout.pglen);
3012
3013 encode_nops(&hdr);
3014}
3015
3016/*
3017 * Encode LAYOUTCOMMIT request
3018 */
3019static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3020 struct xdr_stream *xdr,
3021 const void *priv)
3022{
3023 const struct nfs4_layoutcommit_args *args = priv;
3024 struct nfs4_layoutcommit_data *data =
3025 container_of(args, struct nfs4_layoutcommit_data, args);
3026 struct compound_hdr hdr = {
3027 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3028 };
3029
3030 encode_compound_hdr(xdr, req, &hdr);
3031 encode_sequence(xdr, &args->seq_args, &hdr);
3032 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3033 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3034 encode_getfattr(xdr, args->bitmask, &hdr);
3035 encode_nops(&hdr);
3036}
3037
3038/*
3039 * Encode LAYOUTRETURN request
3040 */
3041static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3042 struct xdr_stream *xdr,
3043 const void *data)
3044{
3045 const struct nfs4_layoutreturn_args *args = data;
3046 struct compound_hdr hdr = {
3047 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3048 };
3049
3050 encode_compound_hdr(xdr, req, &hdr);
3051 encode_sequence(xdr, &args->seq_args, &hdr);
3052 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3053 encode_layoutreturn(xdr, args, &hdr);
3054 encode_nops(&hdr);
3055}
3056
3057/*
3058 * Encode SECINFO_NO_NAME request
3059 */
3060static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3061 struct xdr_stream *xdr,
3062 const void *data)
3063{
3064 const struct nfs41_secinfo_no_name_args *args = data;
3065 struct compound_hdr hdr = {
3066 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3067 };
3068
3069 encode_compound_hdr(xdr, req, &hdr);
3070 encode_sequence(xdr, &args->seq_args, &hdr);
3071 encode_putrootfh(xdr, &hdr);
3072 encode_secinfo_no_name(xdr, args, &hdr);
3073 encode_nops(&hdr);
3074}
3075
3076/*
3077 * Encode TEST_STATEID request
3078 */
3079static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3080 struct xdr_stream *xdr,
3081 const void *data)
3082{
3083 const struct nfs41_test_stateid_args *args = data;
3084 struct compound_hdr hdr = {
3085 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3086 };
3087
3088 encode_compound_hdr(xdr, req, &hdr);
3089 encode_sequence(xdr, &args->seq_args, &hdr);
3090 encode_test_stateid(xdr, args, &hdr);
3091 encode_nops(&hdr);
3092}
3093
3094/*
3095 * Encode FREE_STATEID request
3096 */
3097static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3098 struct xdr_stream *xdr,
3099 const void *data)
3100{
3101 const struct nfs41_free_stateid_args *args = data;
3102 struct compound_hdr hdr = {
3103 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3104 };
3105
3106 encode_compound_hdr(xdr, req, &hdr);
3107 encode_sequence(xdr, &args->seq_args, &hdr);
3108 encode_free_stateid(xdr, args, &hdr);
3109 encode_nops(&hdr);
3110}
3111#endif /* CONFIG_NFS_V4_1 */
3112
3113static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3114{
3115 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3116 "Remaining buffer length is %tu words.\n",
3117 func, xdr->end - xdr->p);
3118}
3119
3120static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3121{
3122 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3123 NFS4_OPAQUE_LIMIT);
3124 if (unlikely(ret < 0)) {
3125 if (ret == -EBADMSG)
3126 print_overflow_msg(__func__, xdr);
3127 return -EIO;
3128 }
3129 *len = ret;
3130 return 0;
3131}
3132
3133static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3134{
3135 __be32 *p;
3136
3137 p = xdr_inline_decode(xdr, 8);
3138 if (unlikely(!p))
3139 goto out_overflow;
3140 hdr->status = be32_to_cpup(p++);
3141 hdr->taglen = be32_to_cpup(p);
3142
3143 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3144 if (unlikely(!p))
3145 goto out_overflow;
3146 hdr->tag = (char *)p;
3147 p += XDR_QUADLEN(hdr->taglen);
3148 hdr->nops = be32_to_cpup(p);
3149 if (unlikely(hdr->nops < 1))
3150 return nfs4_stat_to_errno(hdr->status);
3151 return 0;
3152out_overflow:
3153 print_overflow_msg(__func__, xdr);
3154 return -EIO;
3155}
3156
3157static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3158 int *nfs_retval)
3159{
3160 __be32 *p;
3161 uint32_t opnum;
3162 int32_t nfserr;
3163
3164 p = xdr_inline_decode(xdr, 8);
3165 if (unlikely(!p))
3166 goto out_overflow;
3167 opnum = be32_to_cpup(p++);
3168 if (unlikely(opnum != expected))
3169 goto out_bad_operation;
3170 nfserr = be32_to_cpup(p);
3171 if (nfserr == NFS_OK)
3172 *nfs_retval = 0;
3173 else
3174 *nfs_retval = nfs4_stat_to_errno(nfserr);
3175 return true;
3176out_bad_operation:
3177 dprintk("nfs: Server returned operation"
3178 " %d but we issued a request for %d\n",
3179 opnum, expected);
3180 *nfs_retval = -EREMOTEIO;
3181 return false;
3182out_overflow:
3183 print_overflow_msg(__func__, xdr);
3184 *nfs_retval = -EIO;
3185 return false;
3186}
3187
3188static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3189{
3190 int retval;
3191
3192 __decode_op_hdr(xdr, expected, &retval);
3193 return retval;
3194}
3195
3196/* Dummy routine */
3197static int decode_ace(struct xdr_stream *xdr, void *ace)
3198{
3199 __be32 *p;
3200 unsigned int strlen;
3201 char *str;
3202
3203 p = xdr_inline_decode(xdr, 12);
3204 if (likely(p))
3205 return decode_opaque_inline(xdr, &strlen, &str);
3206 print_overflow_msg(__func__, xdr);
3207 return -EIO;
3208}
3209
3210static ssize_t
3211decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3212{
3213 ssize_t ret;
3214
3215 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3216 if (likely(ret >= 0))
3217 return ret;
3218 if (ret == -EMSGSIZE)
3219 return sz;
3220 print_overflow_msg(__func__, xdr);
3221 return -EIO;
3222}
3223
3224static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3225{
3226 ssize_t ret;
3227 ret = decode_bitmap4(xdr, bitmap, 3);
3228 return ret < 0 ? ret : 0;
3229}
3230
3231static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3232{
3233 __be32 *p;
3234
3235 p = xdr_inline_decode(xdr, 4);
3236 if (unlikely(!p))
3237 goto out_overflow;
3238 *attrlen = be32_to_cpup(p);
3239 *savep = xdr_stream_pos(xdr);
3240 return 0;
3241out_overflow:
3242 print_overflow_msg(__func__, xdr);
3243 return -EIO;
3244}
3245
3246static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3247{
3248 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3249 int ret;
3250 ret = decode_attr_bitmap(xdr, bitmask);
3251 if (unlikely(ret < 0))
3252 return ret;
3253 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3254 } else
3255 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3256 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3257 bitmask[0], bitmask[1], bitmask[2]);
3258 return 0;
3259}
3260
3261static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3262{
3263 __be32 *p;
3264 int ret = 0;
3265
3266 *type = 0;
3267 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3268 return -EIO;
3269 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3270 p = xdr_inline_decode(xdr, 4);
3271 if (unlikely(!p))
3272 goto out_overflow;
3273 *type = be32_to_cpup(p);
3274 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3275 dprintk("%s: bad type %d\n", __func__, *type);
3276 return -EIO;
3277 }
3278 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3279 ret = NFS_ATTR_FATTR_TYPE;
3280 }
3281 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3282 return ret;
3283out_overflow:
3284 print_overflow_msg(__func__, xdr);
3285 return -EIO;
3286}
3287
3288static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3289 uint32_t *bitmap, uint32_t *type)
3290{
3291 __be32 *p;
3292
3293 *type = 0;
3294 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3295 return -EIO;
3296 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3297 p = xdr_inline_decode(xdr, 4);
3298 if (unlikely(!p))
3299 goto out_overflow;
3300 *type = be32_to_cpup(p);
3301 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3302 }
3303 dprintk("%s: expire type=0x%x\n", __func__, *type);
3304 return 0;
3305out_overflow:
3306 print_overflow_msg(__func__, xdr);
3307 return -EIO;
3308}
3309
3310static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3311{
3312 __be32 *p;
3313 int ret = 0;
3314
3315 *change = 0;
3316 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3317 return -EIO;
3318 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3319 p = xdr_inline_decode(xdr, 8);
3320 if (unlikely(!p))
3321 goto out_overflow;
3322 xdr_decode_hyper(p, change);
3323 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3324 ret = NFS_ATTR_FATTR_CHANGE;
3325 }
3326 dprintk("%s: change attribute=%Lu\n", __func__,
3327 (unsigned long long)*change);
3328 return ret;
3329out_overflow:
3330 print_overflow_msg(__func__, xdr);
3331 return -EIO;
3332}
3333
3334static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3335{
3336 __be32 *p;
3337 int ret = 0;
3338
3339 *size = 0;
3340 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3341 return -EIO;
3342 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3343 p = xdr_inline_decode(xdr, 8);
3344 if (unlikely(!p))
3345 goto out_overflow;
3346 xdr_decode_hyper(p, size);
3347 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3348 ret = NFS_ATTR_FATTR_SIZE;
3349 }
3350 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3351 return ret;
3352out_overflow:
3353 print_overflow_msg(__func__, xdr);
3354 return -EIO;
3355}
3356
3357static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3358{
3359 __be32 *p;
3360
3361 *res = 0;
3362 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3363 return -EIO;
3364 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3365 p = xdr_inline_decode(xdr, 4);
3366 if (unlikely(!p))
3367 goto out_overflow;
3368 *res = be32_to_cpup(p);
3369 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3370 }
3371 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3372 return 0;
3373out_overflow:
3374 print_overflow_msg(__func__, xdr);
3375 return -EIO;
3376}
3377
3378static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3379{
3380 __be32 *p;
3381
3382 *res = 0;
3383 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3384 return -EIO;
3385 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3386 p = xdr_inline_decode(xdr, 4);
3387 if (unlikely(!p))
3388 goto out_overflow;
3389 *res = be32_to_cpup(p);
3390 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3391 }
3392 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3393 return 0;
3394out_overflow:
3395 print_overflow_msg(__func__, xdr);
3396 return -EIO;
3397}
3398
3399static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3400{
3401 __be32 *p;
3402 int ret = 0;
3403
3404 fsid->major = 0;
3405 fsid->minor = 0;
3406 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3407 return -EIO;
3408 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3409 p = xdr_inline_decode(xdr, 16);
3410 if (unlikely(!p))
3411 goto out_overflow;
3412 p = xdr_decode_hyper(p, &fsid->major);
3413 xdr_decode_hyper(p, &fsid->minor);
3414 bitmap[0] &= ~FATTR4_WORD0_FSID;
3415 ret = NFS_ATTR_FATTR_FSID;
3416 }
3417 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3418 (unsigned long long)fsid->major,
3419 (unsigned long long)fsid->minor);
3420 return ret;
3421out_overflow:
3422 print_overflow_msg(__func__, xdr);
3423 return -EIO;
3424}
3425
3426static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3427{
3428 __be32 *p;
3429
3430 *res = 60;
3431 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3432 return -EIO;
3433 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3434 p = xdr_inline_decode(xdr, 4);
3435 if (unlikely(!p))
3436 goto out_overflow;
3437 *res = be32_to_cpup(p);
3438 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3439 }
3440 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3441 return 0;
3442out_overflow:
3443 print_overflow_msg(__func__, xdr);
3444 return -EIO;
3445}
3446
3447static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3448{
3449 __be32 *p;
3450
3451 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3452 return -EIO;
3453 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3454 p = xdr_inline_decode(xdr, 4);
3455 if (unlikely(!p))
3456 goto out_overflow;
3457 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3458 *res = -be32_to_cpup(p);
3459 }
3460 return 0;
3461out_overflow:
3462 print_overflow_msg(__func__, xdr);
3463 return -EIO;
3464}
3465
3466static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3467 uint32_t *bitmap, uint32_t *bitmask)
3468{
3469 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3470 int ret;
3471 ret = decode_attr_bitmap(xdr, bitmask);
3472 if (unlikely(ret < 0))
3473 return ret;
3474 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3475 } else
3476 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3477 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3478 bitmask[0], bitmask[1], bitmask[2]);
3479 return 0;
3480}
3481
3482static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3483{
3484 __be32 *p;
3485 int len;
3486
3487 if (fh != NULL)
3488 memset(fh, 0, sizeof(*fh));
3489
3490 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3491 return -EIO;
3492 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3493 p = xdr_inline_decode(xdr, 4);
3494 if (unlikely(!p))
3495 goto out_overflow;
3496 len = be32_to_cpup(p);
3497 if (len > NFS4_FHSIZE)
3498 return -EIO;
3499 p = xdr_inline_decode(xdr, len);
3500 if (unlikely(!p))
3501 goto out_overflow;
3502 if (fh != NULL) {
3503 memcpy(fh->data, p, len);
3504 fh->size = len;
3505 }
3506 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3507 }
3508 return 0;
3509out_overflow:
3510 print_overflow_msg(__func__, xdr);
3511 return -EIO;
3512}
3513
3514static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3515{
3516 __be32 *p;
3517
3518 *res = 0;
3519 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3520 return -EIO;
3521 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3522 p = xdr_inline_decode(xdr, 4);
3523 if (unlikely(!p))
3524 goto out_overflow;
3525 *res = be32_to_cpup(p);
3526 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3527 }
3528 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3529 return 0;
3530out_overflow:
3531 print_overflow_msg(__func__, xdr);
3532 return -EIO;
3533}
3534
3535static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3536{
3537 __be32 *p;
3538 int ret = 0;
3539
3540 *fileid = 0;
3541 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3542 return -EIO;
3543 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3544 p = xdr_inline_decode(xdr, 8);
3545 if (unlikely(!p))
3546 goto out_overflow;
3547 xdr_decode_hyper(p, fileid);
3548 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3549 ret = NFS_ATTR_FATTR_FILEID;
3550 }
3551 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3552 return ret;
3553out_overflow:
3554 print_overflow_msg(__func__, xdr);
3555 return -EIO;
3556}
3557
3558static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3559{
3560 __be32 *p;
3561 int ret = 0;
3562
3563 *fileid = 0;
3564 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3565 return -EIO;
3566 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3567 p = xdr_inline_decode(xdr, 8);
3568 if (unlikely(!p))
3569 goto out_overflow;
3570 xdr_decode_hyper(p, fileid);
3571 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3572 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3573 }
3574 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3575 return ret;
3576out_overflow:
3577 print_overflow_msg(__func__, xdr);
3578 return -EIO;
3579}
3580
3581static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3582{
3583 __be32 *p;
3584 int status = 0;
3585
3586 *res = 0;
3587 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3588 return -EIO;
3589 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3590 p = xdr_inline_decode(xdr, 8);
3591 if (unlikely(!p))
3592 goto out_overflow;
3593 xdr_decode_hyper(p, res);
3594 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3595 }
3596 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3597 return status;
3598out_overflow:
3599 print_overflow_msg(__func__, xdr);
3600 return -EIO;
3601}
3602
3603static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3604{
3605 __be32 *p;
3606 int status = 0;
3607
3608 *res = 0;
3609 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3610 return -EIO;
3611 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3612 p = xdr_inline_decode(xdr, 8);
3613 if (unlikely(!p))
3614 goto out_overflow;
3615 xdr_decode_hyper(p, res);
3616 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3617 }
3618 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3619 return status;
3620out_overflow:
3621 print_overflow_msg(__func__, xdr);
3622 return -EIO;
3623}
3624
3625static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3626{
3627 __be32 *p;
3628 int status = 0;
3629
3630 *res = 0;
3631 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3632 return -EIO;
3633 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3634 p = xdr_inline_decode(xdr, 8);
3635 if (unlikely(!p))
3636 goto out_overflow;
3637 xdr_decode_hyper(p, res);
3638 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3639 }
3640 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3641 return status;
3642out_overflow:
3643 print_overflow_msg(__func__, xdr);
3644 return -EIO;
3645}
3646
3647static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3648{
3649 u32 n;
3650 __be32 *p;
3651 int status = 0;
3652
3653 p = xdr_inline_decode(xdr, 4);
3654 if (unlikely(!p))
3655 goto out_overflow;
3656 n = be32_to_cpup(p);
3657 if (n == 0)
3658 goto root_path;
3659 dprintk("pathname4: ");
3660 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3661 dprintk("cannot parse %d components in path\n", n);
3662 goto out_eio;
3663 }
3664 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3665 struct nfs4_string *component = &path->components[path->ncomponents];
3666 status = decode_opaque_inline(xdr, &component->len, &component->data);
3667 if (unlikely(status != 0))
3668 goto out_eio;
3669 ifdebug (XDR)
3670 pr_cont("%s%.*s ",
3671 (path->ncomponents != n ? "/ " : ""),
3672 component->len, component->data);
3673 }
3674out:
3675 return status;
3676root_path:
3677/* a root pathname is sent as a zero component4 */
3678 path->ncomponents = 1;
3679 path->components[0].len=0;
3680 path->components[0].data=NULL;
3681 dprintk("pathname4: /\n");
3682 goto out;
3683out_eio:
3684 dprintk(" status %d", status);
3685 status = -EIO;
3686 goto out;
3687out_overflow:
3688 print_overflow_msg(__func__, xdr);
3689 return -EIO;
3690}
3691
3692static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3693{
3694 int n;
3695 __be32 *p;
3696 int status = -EIO;
3697
3698 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3699 goto out;
3700 status = 0;
3701 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3702 goto out;
3703 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3704 status = -EIO;
3705 /* Ignore borken servers that return unrequested attrs */
3706 if (unlikely(res == NULL))
3707 goto out;
3708 dprintk("%s: fsroot:\n", __func__);
3709 status = decode_pathname(xdr, &res->fs_path);
3710 if (unlikely(status != 0))
3711 goto out;
3712 p = xdr_inline_decode(xdr, 4);
3713 if (unlikely(!p))
3714 goto out_overflow;
3715 n = be32_to_cpup(p);
3716 if (n <= 0)
3717 goto out_eio;
3718 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3719 u32 m;
3720 struct nfs4_fs_location *loc;
3721
3722 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3723 break;
3724 loc = &res->locations[res->nlocations];
3725 p = xdr_inline_decode(xdr, 4);
3726 if (unlikely(!p))
3727 goto out_overflow;
3728 m = be32_to_cpup(p);
3729
3730 dprintk("%s: servers:\n", __func__);
3731 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3732 struct nfs4_string *server;
3733
3734 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3735 unsigned int i;
3736 dprintk("%s: using first %u of %u servers "
3737 "returned for location %u\n",
3738 __func__,
3739 NFS4_FS_LOCATION_MAXSERVERS,
3740 m, res->nlocations);
3741 for (i = loc->nservers; i < m; i++) {
3742 unsigned int len;
3743 char *data;
3744 status = decode_opaque_inline(xdr, &len, &data);
3745 if (unlikely(status != 0))
3746 goto out_eio;
3747 }
3748 break;
3749 }
3750 server = &loc->servers[loc->nservers];
3751 status = decode_opaque_inline(xdr, &server->len, &server->data);
3752 if (unlikely(status != 0))
3753 goto out_eio;
3754 dprintk("%s ", server->data);
3755 }
3756 status = decode_pathname(xdr, &loc->rootpath);
3757 if (unlikely(status != 0))
3758 goto out_eio;
3759 }
3760 if (res->nlocations != 0)
3761 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3762out:
3763 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3764 return status;
3765out_overflow:
3766 print_overflow_msg(__func__, xdr);
3767out_eio:
3768 status = -EIO;
3769 goto out;
3770}
3771
3772static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3773{
3774 __be32 *p;
3775 int status = 0;
3776
3777 *res = 0;
3778 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3779 return -EIO;
3780 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3781 p = xdr_inline_decode(xdr, 8);
3782 if (unlikely(!p))
3783 goto out_overflow;
3784 xdr_decode_hyper(p, res);
3785 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3786 }
3787 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3788 return status;
3789out_overflow:
3790 print_overflow_msg(__func__, xdr);
3791 return -EIO;
3792}
3793
3794static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3795{
3796 __be32 *p;
3797 int status = 0;
3798
3799 *maxlink = 1;
3800 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3801 return -EIO;
3802 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3803 p = xdr_inline_decode(xdr, 4);
3804 if (unlikely(!p))
3805 goto out_overflow;
3806 *maxlink = be32_to_cpup(p);
3807 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3808 }
3809 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3810 return status;
3811out_overflow:
3812 print_overflow_msg(__func__, xdr);
3813 return -EIO;
3814}
3815
3816static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3817{
3818 __be32 *p;
3819 int status = 0;
3820
3821 *maxname = 1024;
3822 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3823 return -EIO;
3824 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3825 p = xdr_inline_decode(xdr, 4);
3826 if (unlikely(!p))
3827 goto out_overflow;
3828 *maxname = be32_to_cpup(p);
3829 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3830 }
3831 dprintk("%s: maxname=%u\n", __func__, *maxname);
3832 return status;
3833out_overflow:
3834 print_overflow_msg(__func__, xdr);
3835 return -EIO;
3836}
3837
3838static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3839{
3840 __be32 *p;
3841 int status = 0;
3842
3843 *res = 1024;
3844 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3845 return -EIO;
3846 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3847 uint64_t maxread;
3848 p = xdr_inline_decode(xdr, 8);
3849 if (unlikely(!p))
3850 goto out_overflow;
3851 xdr_decode_hyper(p, &maxread);
3852 if (maxread > 0x7FFFFFFF)
3853 maxread = 0x7FFFFFFF;
3854 *res = (uint32_t)maxread;
3855 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3856 }
3857 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3858 return status;
3859out_overflow:
3860 print_overflow_msg(__func__, xdr);
3861 return -EIO;
3862}
3863
3864static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3865{
3866 __be32 *p;
3867 int status = 0;
3868
3869 *res = 1024;
3870 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3871 return -EIO;
3872 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3873 uint64_t maxwrite;
3874 p = xdr_inline_decode(xdr, 8);
3875 if (unlikely(!p))
3876 goto out_overflow;
3877 xdr_decode_hyper(p, &maxwrite);
3878 if (maxwrite > 0x7FFFFFFF)
3879 maxwrite = 0x7FFFFFFF;
3880 *res = (uint32_t)maxwrite;
3881 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3882 }
3883 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3884 return status;
3885out_overflow:
3886 print_overflow_msg(__func__, xdr);
3887 return -EIO;
3888}
3889
3890static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3891{
3892 uint32_t tmp;
3893 __be32 *p;
3894 int ret = 0;
3895
3896 *mode = 0;
3897 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3898 return -EIO;
3899 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3900 p = xdr_inline_decode(xdr, 4);
3901 if (unlikely(!p))
3902 goto out_overflow;
3903 tmp = be32_to_cpup(p);
3904 *mode = tmp & ~S_IFMT;
3905 bitmap[1] &= ~FATTR4_WORD1_MODE;
3906 ret = NFS_ATTR_FATTR_MODE;
3907 }
3908 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3909 return ret;
3910out_overflow:
3911 print_overflow_msg(__func__, xdr);
3912 return -EIO;
3913}
3914
3915static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3916{
3917 __be32 *p;
3918 int ret = 0;
3919
3920 *nlink = 1;
3921 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3922 return -EIO;
3923 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3924 p = xdr_inline_decode(xdr, 4);
3925 if (unlikely(!p))
3926 goto out_overflow;
3927 *nlink = be32_to_cpup(p);
3928 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3929 ret = NFS_ATTR_FATTR_NLINK;
3930 }
3931 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3932 return ret;
3933out_overflow:
3934 print_overflow_msg(__func__, xdr);
3935 return -EIO;
3936}
3937
3938static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3939 struct nfs4_string *name, gfp_t gfp_flags)
3940{
3941 ssize_t ret;
3942
3943 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3944 XDR_MAX_NETOBJ, gfp_flags);
3945 name->len = 0;
3946 if (ret > 0)
3947 name->len = ret;
3948 return ret;
3949}
3950
3951static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3952 const struct nfs_server *server, kuid_t *uid,
3953 struct nfs4_string *owner_name)
3954{
3955 ssize_t len;
3956 char *p;
3957
3958 *uid = make_kuid(&init_user_ns, -2);
3959 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3960 return -EIO;
3961 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3962 return 0;
3963 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3964
3965 if (owner_name != NULL) {
3966 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3967 if (len <= 0)
3968 goto out;
3969 dprintk("%s: name=%s\n", __func__, owner_name->data);
3970 return NFS_ATTR_FATTR_OWNER_NAME;
3971 } else {
3972 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3973 XDR_MAX_NETOBJ);
3974 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3975 goto out;
3976 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3977 return NFS_ATTR_FATTR_OWNER;
3978 }
3979out:
3980 if (len != -EBADMSG)
3981 return 0;
3982 print_overflow_msg(__func__, xdr);
3983 return -EIO;
3984}
3985
3986static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3987 const struct nfs_server *server, kgid_t *gid,
3988 struct nfs4_string *group_name)
3989{
3990 ssize_t len;
3991 char *p;
3992
3993 *gid = make_kgid(&init_user_ns, -2);
3994 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3995 return -EIO;
3996 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3997 return 0;
3998 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3999
4000 if (group_name != NULL) {
4001 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4002 if (len <= 0)
4003 goto out;
4004 dprintk("%s: name=%s\n", __func__, group_name->data);
4005 return NFS_ATTR_FATTR_GROUP_NAME;
4006 } else {
4007 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4008 XDR_MAX_NETOBJ);
4009 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4010 goto out;
4011 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4012 return NFS_ATTR_FATTR_GROUP;
4013 }
4014out:
4015 if (len != -EBADMSG)
4016 return 0;
4017 print_overflow_msg(__func__, xdr);
4018 return -EIO;
4019}
4020
4021static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4022{
4023 uint32_t major = 0, minor = 0;
4024 __be32 *p;
4025 int ret = 0;
4026
4027 *rdev = MKDEV(0,0);
4028 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4029 return -EIO;
4030 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4031 dev_t tmp;
4032
4033 p = xdr_inline_decode(xdr, 8);
4034 if (unlikely(!p))
4035 goto out_overflow;
4036 major = be32_to_cpup(p++);
4037 minor = be32_to_cpup(p);
4038 tmp = MKDEV(major, minor);
4039 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4040 *rdev = tmp;
4041 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4042 ret = NFS_ATTR_FATTR_RDEV;
4043 }
4044 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4045 return ret;
4046out_overflow:
4047 print_overflow_msg(__func__, xdr);
4048 return -EIO;
4049}
4050
4051static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4052{
4053 __be32 *p;
4054 int status = 0;
4055
4056 *res = 0;
4057 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4058 return -EIO;
4059 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4060 p = xdr_inline_decode(xdr, 8);
4061 if (unlikely(!p))
4062 goto out_overflow;
4063 xdr_decode_hyper(p, res);
4064 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4065 }
4066 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4067 return status;
4068out_overflow:
4069 print_overflow_msg(__func__, xdr);
4070 return -EIO;
4071}
4072
4073static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4074{
4075 __be32 *p;
4076 int status = 0;
4077
4078 *res = 0;
4079 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4080 return -EIO;
4081 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4082 p = xdr_inline_decode(xdr, 8);
4083 if (unlikely(!p))
4084 goto out_overflow;
4085 xdr_decode_hyper(p, res);
4086 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4087 }
4088 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4089 return status;
4090out_overflow:
4091 print_overflow_msg(__func__, xdr);
4092 return -EIO;
4093}
4094
4095static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4096{
4097 __be32 *p;
4098 int status = 0;
4099
4100 *res = 0;
4101 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4102 return -EIO;
4103 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4104 p = xdr_inline_decode(xdr, 8);
4105 if (unlikely(!p))
4106 goto out_overflow;
4107 xdr_decode_hyper(p, res);
4108 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4109 }
4110 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4111 return status;
4112out_overflow:
4113 print_overflow_msg(__func__, xdr);
4114 return -EIO;
4115}
4116
4117static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4118{
4119 __be32 *p;
4120 int ret = 0;
4121
4122 *used = 0;
4123 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4124 return -EIO;
4125 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4126 p = xdr_inline_decode(xdr, 8);
4127 if (unlikely(!p))
4128 goto out_overflow;
4129 xdr_decode_hyper(p, used);
4130 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4131 ret = NFS_ATTR_FATTR_SPACE_USED;
4132 }
4133 dprintk("%s: space used=%Lu\n", __func__,
4134 (unsigned long long)*used);
4135 return ret;
4136out_overflow:
4137 print_overflow_msg(__func__, xdr);
4138 return -EIO;
4139}
4140
4141static __be32 *
4142xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4143{
4144 __u64 sec;
4145
4146 p = xdr_decode_hyper(p, &sec);
4147 t-> tv_sec = (time_t)sec;
4148 t->tv_nsec = be32_to_cpup(p++);
4149 return p;
4150}
4151
4152static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4153{
4154 __be32 *p;
4155
4156 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4157 if (unlikely(!p))
4158 goto out_overflow;
4159 xdr_decode_nfstime4(p, time);
4160 return 0;
4161out_overflow:
4162 print_overflow_msg(__func__, xdr);
4163 return -EIO;
4164}
4165
4166static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4167{
4168 int status = 0;
4169
4170 time->tv_sec = 0;
4171 time->tv_nsec = 0;
4172 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4173 return -EIO;
4174 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4175 status = decode_attr_time(xdr, time);
4176 if (status == 0)
4177 status = NFS_ATTR_FATTR_ATIME;
4178 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4179 }
4180 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4181 return status;
4182}
4183
4184static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4185{
4186 int status = 0;
4187
4188 time->tv_sec = 0;
4189 time->tv_nsec = 0;
4190 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4191 return -EIO;
4192 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4193 status = decode_attr_time(xdr, time);
4194 if (status == 0)
4195 status = NFS_ATTR_FATTR_CTIME;
4196 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4197 }
4198 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4199 return status;
4200}
4201
4202static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4203 struct timespec *time)
4204{
4205 int status = 0;
4206
4207 time->tv_sec = 0;
4208 time->tv_nsec = 0;
4209 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4210 return -EIO;
4211 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4212 status = decode_attr_time(xdr, time);
4213 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4214 }
4215 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4216 (long)time->tv_nsec);
4217 return status;
4218}
4219
4220static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4221 struct nfs4_label *label)
4222{
4223 uint32_t pi = 0;
4224 uint32_t lfs = 0;
4225 __u32 len;
4226 __be32 *p;
4227 int status = 0;
4228
4229 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4230 return -EIO;
4231 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4232 p = xdr_inline_decode(xdr, 4);
4233 if (unlikely(!p))
4234 goto out_overflow;
4235 lfs = be32_to_cpup(p++);
4236 p = xdr_inline_decode(xdr, 4);
4237 if (unlikely(!p))
4238 goto out_overflow;
4239 pi = be32_to_cpup(p++);
4240 p = xdr_inline_decode(xdr, 4);
4241 if (unlikely(!p))
4242 goto out_overflow;
4243 len = be32_to_cpup(p++);
4244 p = xdr_inline_decode(xdr, len);
4245 if (unlikely(!p))
4246 goto out_overflow;
4247 if (len < NFS4_MAXLABELLEN) {
4248 if (label) {
4249 memcpy(label->label, p, len);
4250 label->len = len;
4251 label->pi = pi;
4252 label->lfs = lfs;
4253 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4254 }
4255 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4256 } else
4257 printk(KERN_WARNING "%s: label too long (%u)!\n",
4258 __func__, len);
4259 }
4260 if (label && label->label)
4261 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4262 (char *)label->label, label->len, label->pi, label->lfs);
4263 return status;
4264
4265out_overflow:
4266 print_overflow_msg(__func__, xdr);
4267 return -EIO;
4268}
4269
4270static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4271{
4272 int status = 0;
4273
4274 time->tv_sec = 0;
4275 time->tv_nsec = 0;
4276 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4277 return -EIO;
4278 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4279 status = decode_attr_time(xdr, time);
4280 if (status == 0)
4281 status = NFS_ATTR_FATTR_MTIME;
4282 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4283 }
4284 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4285 return status;
4286}
4287
4288static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4289{
4290 unsigned int attrwords = XDR_QUADLEN(attrlen);
4291 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4292
4293 if (unlikely(attrwords != nwords)) {
4294 dprintk("%s: server returned incorrect attribute length: "
4295 "%u %c %u\n",
4296 __func__,
4297 attrwords << 2,
4298 (attrwords < nwords) ? '<' : '>',
4299 nwords << 2);
4300 return -EIO;
4301 }
4302 return 0;
4303}
4304
4305static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4306{
4307 __be32 *p;
4308
4309 p = xdr_inline_decode(xdr, 20);
4310 if (unlikely(!p))
4311 goto out_overflow;
4312 cinfo->atomic = be32_to_cpup(p++);
4313 p = xdr_decode_hyper(p, &cinfo->before);
4314 xdr_decode_hyper(p, &cinfo->after);
4315 return 0;
4316out_overflow:
4317 print_overflow_msg(__func__, xdr);
4318 return -EIO;
4319}
4320
4321static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4322{
4323 __be32 *p;
4324 uint32_t supp, acc;
4325 int status;
4326
4327 status = decode_op_hdr(xdr, OP_ACCESS);
4328 if (status)
4329 return status;
4330 p = xdr_inline_decode(xdr, 8);
4331 if (unlikely(!p))
4332 goto out_overflow;
4333 supp = be32_to_cpup(p++);
4334 acc = be32_to_cpup(p);
4335 *supported = supp;
4336 *access = acc;
4337 return 0;
4338out_overflow:
4339 print_overflow_msg(__func__, xdr);
4340 return -EIO;
4341}
4342
4343static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4344{
4345 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4346 if (unlikely(ret < 0)) {
4347 print_overflow_msg(__func__, xdr);
4348 return -EIO;
4349 }
4350 return 0;
4351}
4352
4353static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4354{
4355 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4356}
4357
4358static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4359{
4360 stateid->type = NFS4_OPEN_STATEID_TYPE;
4361 return decode_stateid(xdr, stateid);
4362}
4363
4364static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4365{
4366 stateid->type = NFS4_LOCK_STATEID_TYPE;
4367 return decode_stateid(xdr, stateid);
4368}
4369
4370static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371{
4372 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4373 return decode_stateid(xdr, stateid);
4374}
4375
4376static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377{
4378 nfs4_stateid dummy;
4379
4380 nfs4_stateid_copy(stateid, &invalid_stateid);
4381 return decode_stateid(xdr, &dummy);
4382}
4383
4384static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4385{
4386 int status;
4387
4388 status = decode_op_hdr(xdr, OP_CLOSE);
4389 if (status != -EIO)
4390 nfs_increment_open_seqid(status, res->seqid);
4391 if (!status)
4392 status = decode_invalid_stateid(xdr, &res->stateid);
4393 return status;
4394}
4395
4396static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4397{
4398 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4399}
4400
4401static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4402{
4403 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4404}
4405
4406static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4407{
4408 int status;
4409
4410 status = decode_op_hdr(xdr, OP_COMMIT);
4411 if (!status)
4412 status = decode_write_verifier(xdr, &res->verf->verifier);
4413 return status;
4414}
4415
4416static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4417{
4418 __be32 *p;
4419 uint32_t bmlen;
4420 int status;
4421
4422 status = decode_op_hdr(xdr, OP_CREATE);
4423 if (status)
4424 return status;
4425 if ((status = decode_change_info(xdr, cinfo)))
4426 return status;
4427 p = xdr_inline_decode(xdr, 4);
4428 if (unlikely(!p))
4429 goto out_overflow;
4430 bmlen = be32_to_cpup(p);
4431 p = xdr_inline_decode(xdr, bmlen << 2);
4432 if (likely(p))
4433 return 0;
4434out_overflow:
4435 print_overflow_msg(__func__, xdr);
4436 return -EIO;
4437}
4438
4439static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4440{
4441 unsigned int savep;
4442 uint32_t attrlen, bitmap[3] = {0};
4443 int status;
4444
4445 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4446 goto xdr_error;
4447 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4448 goto xdr_error;
4449 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4450 goto xdr_error;
4451 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4452 goto xdr_error;
4453 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4454 &res->fh_expire_type)) != 0)
4455 goto xdr_error;
4456 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4457 goto xdr_error;
4458 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4459 goto xdr_error;
4460 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4461 goto xdr_error;
4462 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4463 res->exclcreat_bitmask)) != 0)
4464 goto xdr_error;
4465 status = verify_attr_len(xdr, savep, attrlen);
4466xdr_error:
4467 dprintk("%s: xdr returned %d!\n", __func__, -status);
4468 return status;
4469}
4470
4471static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4472{
4473 unsigned int savep;
4474 uint32_t attrlen, bitmap[3] = {0};
4475 int status;
4476
4477 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4478 goto xdr_error;
4479 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4480 goto xdr_error;
4481 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4482 goto xdr_error;
4483
4484 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4485 goto xdr_error;
4486 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4487 goto xdr_error;
4488 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4489 goto xdr_error;
4490
4491 status = -EIO;
4492 if (unlikely(bitmap[0]))
4493 goto xdr_error;
4494
4495 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4496 goto xdr_error;
4497 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4498 goto xdr_error;
4499 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4500 goto xdr_error;
4501
4502 status = verify_attr_len(xdr, savep, attrlen);
4503xdr_error:
4504 dprintk("%s: xdr returned %d!\n", __func__, -status);
4505 return status;
4506}
4507
4508static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4509{
4510 unsigned int savep;
4511 uint32_t attrlen, bitmap[3] = {0};
4512 int status;
4513
4514 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4515 goto xdr_error;
4516 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4517 goto xdr_error;
4518 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4519 goto xdr_error;
4520
4521 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4522 goto xdr_error;
4523 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4524 goto xdr_error;
4525
4526 status = verify_attr_len(xdr, savep, attrlen);
4527xdr_error:
4528 dprintk("%s: xdr returned %d!\n", __func__, -status);
4529 return status;
4530}
4531
4532static int decode_threshold_hint(struct xdr_stream *xdr,
4533 uint32_t *bitmap,
4534 uint64_t *res,
4535 uint32_t hint_bit)
4536{
4537 __be32 *p;
4538
4539 *res = 0;
4540 if (likely(bitmap[0] & hint_bit)) {
4541 p = xdr_inline_decode(xdr, 8);
4542 if (unlikely(!p))
4543 goto out_overflow;
4544 xdr_decode_hyper(p, res);
4545 }
4546 return 0;
4547out_overflow:
4548 print_overflow_msg(__func__, xdr);
4549 return -EIO;
4550}
4551
4552static int decode_first_threshold_item4(struct xdr_stream *xdr,
4553 struct nfs4_threshold *res)
4554{
4555 __be32 *p;
4556 unsigned int savep;
4557 uint32_t bitmap[3] = {0,}, attrlen;
4558 int status;
4559
4560 /* layout type */
4561 p = xdr_inline_decode(xdr, 4);
4562 if (unlikely(!p)) {
4563 print_overflow_msg(__func__, xdr);
4564 return -EIO;
4565 }
4566 res->l_type = be32_to_cpup(p);
4567
4568 /* thi_hintset bitmap */
4569 status = decode_attr_bitmap(xdr, bitmap);
4570 if (status < 0)
4571 goto xdr_error;
4572
4573 /* thi_hintlist length */
4574 status = decode_attr_length(xdr, &attrlen, &savep);
4575 if (status < 0)
4576 goto xdr_error;
4577 /* thi_hintlist */
4578 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4579 if (status < 0)
4580 goto xdr_error;
4581 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4582 if (status < 0)
4583 goto xdr_error;
4584 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4585 THRESHOLD_RD_IO);
4586 if (status < 0)
4587 goto xdr_error;
4588 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4589 THRESHOLD_WR_IO);
4590 if (status < 0)
4591 goto xdr_error;
4592
4593 status = verify_attr_len(xdr, savep, attrlen);
4594 res->bm = bitmap[0];
4595
4596 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4597 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4598 res->wr_io_sz);
4599xdr_error:
4600 dprintk("%s ret=%d!\n", __func__, status);
4601 return status;
4602}
4603
4604/*
4605 * Thresholds on pNFS direct I/O vrs MDS I/O
4606 */
4607static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4608 uint32_t *bitmap,
4609 struct nfs4_threshold *res)
4610{
4611 __be32 *p;
4612 int status = 0;
4613 uint32_t num;
4614
4615 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4616 return -EIO;
4617 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4618 /* Did the server return an unrequested attribute? */
4619 if (unlikely(res == NULL))
4620 return -EREMOTEIO;
4621 p = xdr_inline_decode(xdr, 4);
4622 if (unlikely(!p))
4623 goto out_overflow;
4624 num = be32_to_cpup(p);
4625 if (num == 0)
4626 return 0;
4627 if (num > 1)
4628 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4629 "drivers per filesystem not supported\n",
4630 __func__);
4631
4632 status = decode_first_threshold_item4(xdr, res);
4633 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4634 }
4635 return status;
4636out_overflow:
4637 print_overflow_msg(__func__, xdr);
4638 return -EIO;
4639}
4640
4641static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4642 struct nfs_fattr *fattr, struct nfs_fh *fh,
4643 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4644 const struct nfs_server *server)
4645{
4646 int status;
4647 umode_t fmode = 0;
4648 uint32_t type;
4649 int32_t err;
4650
4651 status = decode_attr_type(xdr, bitmap, &type);
4652 if (status < 0)
4653 goto xdr_error;
4654 fattr->mode = 0;
4655 if (status != 0) {
4656 fattr->mode |= nfs_type2fmt[type];
4657 fattr->valid |= status;
4658 }
4659
4660 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4661 if (status < 0)
4662 goto xdr_error;
4663 fattr->valid |= status;
4664
4665 status = decode_attr_size(xdr, bitmap, &fattr->size);
4666 if (status < 0)
4667 goto xdr_error;
4668 fattr->valid |= status;
4669
4670 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4671 if (status < 0)
4672 goto xdr_error;
4673 fattr->valid |= status;
4674
4675 err = 0;
4676 status = decode_attr_error(xdr, bitmap, &err);
4677 if (status < 0)
4678 goto xdr_error;
4679
4680 status = decode_attr_filehandle(xdr, bitmap, fh);
4681 if (status < 0)
4682 goto xdr_error;
4683
4684 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4685 if (status < 0)
4686 goto xdr_error;
4687 fattr->valid |= status;
4688
4689 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4690 if (status < 0)
4691 goto xdr_error;
4692 fattr->valid |= status;
4693
4694 status = -EIO;
4695 if (unlikely(bitmap[0]))
4696 goto xdr_error;
4697
4698 status = decode_attr_mode(xdr, bitmap, &fmode);
4699 if (status < 0)
4700 goto xdr_error;
4701 if (status != 0) {
4702 fattr->mode |= fmode;
4703 fattr->valid |= status;
4704 }
4705
4706 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4707 if (status < 0)
4708 goto xdr_error;
4709 fattr->valid |= status;
4710
4711 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4712 if (status < 0)
4713 goto xdr_error;
4714 fattr->valid |= status;
4715
4716 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4717 if (status < 0)
4718 goto xdr_error;
4719 fattr->valid |= status;
4720
4721 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4722 if (status < 0)
4723 goto xdr_error;
4724 fattr->valid |= status;
4725
4726 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4727 if (status < 0)
4728 goto xdr_error;
4729 fattr->valid |= status;
4730
4731 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4732 if (status < 0)
4733 goto xdr_error;
4734 fattr->valid |= status;
4735
4736 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4737 if (status < 0)
4738 goto xdr_error;
4739 fattr->valid |= status;
4740
4741 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4742 if (status < 0)
4743 goto xdr_error;
4744 fattr->valid |= status;
4745
4746 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4747 if (status < 0)
4748 goto xdr_error;
4749 fattr->valid |= status;
4750
4751 status = -EIO;
4752 if (unlikely(bitmap[1]))
4753 goto xdr_error;
4754
4755 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4756 if (status < 0)
4757 goto xdr_error;
4758
4759 if (label) {
4760 status = decode_attr_security_label(xdr, bitmap, label);
4761 if (status < 0)
4762 goto xdr_error;
4763 fattr->valid |= status;
4764 }
4765
4766xdr_error:
4767 dprintk("%s: xdr returned %d\n", __func__, -status);
4768 return status;
4769}
4770
4771static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4772 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4773 struct nfs4_label *label, const struct nfs_server *server)
4774{
4775 unsigned int savep;
4776 uint32_t attrlen,
4777 bitmap[3] = {0};
4778 int status;
4779
4780 status = decode_op_hdr(xdr, OP_GETATTR);
4781 if (status < 0)
4782 goto xdr_error;
4783
4784 status = decode_attr_bitmap(xdr, bitmap);
4785 if (status < 0)
4786 goto xdr_error;
4787
4788 status = decode_attr_length(xdr, &attrlen, &savep);
4789 if (status < 0)
4790 goto xdr_error;
4791
4792 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4793 label, server);
4794 if (status < 0)
4795 goto xdr_error;
4796
4797 status = verify_attr_len(xdr, savep, attrlen);
4798xdr_error:
4799 dprintk("%s: xdr returned %d\n", __func__, -status);
4800 return status;
4801}
4802
4803static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4804 struct nfs4_label *label, const struct nfs_server *server)
4805{
4806 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4807}
4808
4809static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4810 const struct nfs_server *server)
4811{
4812 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4813}
4814
4815/*
4816 * Decode potentially multiple layout types.
4817 */
4818static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4819 struct nfs_fsinfo *fsinfo)
4820{
4821 __be32 *p;
4822 uint32_t i;
4823
4824 p = xdr_inline_decode(xdr, 4);
4825 if (unlikely(!p))
4826 goto out_overflow;
4827 fsinfo->nlayouttypes = be32_to_cpup(p);
4828
4829 /* pNFS is not supported by the underlying file system */
4830 if (fsinfo->nlayouttypes == 0)
4831 return 0;
4832
4833 /* Decode and set first layout type, move xdr->p past unused types */
4834 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4835 if (unlikely(!p))
4836 goto out_overflow;
4837
4838 /* If we get too many, then just cap it at the max */
4839 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4840 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4841 __func__, fsinfo->nlayouttypes);
4842 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4843 }
4844
4845 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4846 fsinfo->layouttype[i] = be32_to_cpup(p++);
4847 return 0;
4848out_overflow:
4849 print_overflow_msg(__func__, xdr);
4850 return -EIO;
4851}
4852
4853/*
4854 * The type of file system exported.
4855 * Note we must ensure that layouttype is set in any non-error case.
4856 */
4857static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4858 struct nfs_fsinfo *fsinfo)
4859{
4860 int status = 0;
4861
4862 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4863 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4864 return -EIO;
4865 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4866 status = decode_pnfs_layout_types(xdr, fsinfo);
4867 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4868 }
4869 return status;
4870}
4871
4872/*
4873 * The prefered block size for layout directed io
4874 */
4875static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4876 uint32_t *res)
4877{
4878 __be32 *p;
4879
4880 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4881 *res = 0;
4882 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4883 p = xdr_inline_decode(xdr, 4);
4884 if (unlikely(!p)) {
4885 print_overflow_msg(__func__, xdr);
4886 return -EIO;
4887 }
4888 *res = be32_to_cpup(p);
4889 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4890 }
4891 return 0;
4892}
4893
4894/*
4895 * The granularity of a CLONE operation.
4896 */
4897static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4898 uint32_t *res)
4899{
4900 __be32 *p;
4901
4902 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4903 *res = 0;
4904 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4905 p = xdr_inline_decode(xdr, 4);
4906 if (unlikely(!p)) {
4907 print_overflow_msg(__func__, xdr);
4908 return -EIO;
4909 }
4910 *res = be32_to_cpup(p);
4911 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4912 }
4913 return 0;
4914}
4915
4916static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4917{
4918 unsigned int savep;
4919 uint32_t attrlen, bitmap[3];
4920 int status;
4921
4922 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4923 goto xdr_error;
4924 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4925 goto xdr_error;
4926 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4927 goto xdr_error;
4928
4929 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4930
4931 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4932 goto xdr_error;
4933 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4934 goto xdr_error;
4935 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4936 goto xdr_error;
4937 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4938 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4939 goto xdr_error;
4940 fsinfo->wtpref = fsinfo->wtmax;
4941
4942 status = -EIO;
4943 if (unlikely(bitmap[0]))
4944 goto xdr_error;
4945
4946 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4947 if (status != 0)
4948 goto xdr_error;
4949 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4950 if (status != 0)
4951 goto xdr_error;
4952
4953 status = -EIO;
4954 if (unlikely(bitmap[1]))
4955 goto xdr_error;
4956
4957 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4958 if (status)
4959 goto xdr_error;
4960 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4961 if (status)
4962 goto xdr_error;
4963
4964 status = verify_attr_len(xdr, savep, attrlen);
4965xdr_error:
4966 dprintk("%s: xdr returned %d!\n", __func__, -status);
4967 return status;
4968}
4969
4970static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4971{
4972 __be32 *p;
4973 uint32_t len;
4974 int status;
4975
4976 /* Zero handle first to allow comparisons */
4977 memset(fh, 0, sizeof(*fh));
4978
4979 status = decode_op_hdr(xdr, OP_GETFH);
4980 if (status)
4981 return status;
4982
4983 p = xdr_inline_decode(xdr, 4);
4984 if (unlikely(!p))
4985 goto out_overflow;
4986 len = be32_to_cpup(p);
4987 if (len > NFS4_FHSIZE)
4988 return -EIO;
4989 fh->size = len;
4990 p = xdr_inline_decode(xdr, len);
4991 if (unlikely(!p))
4992 goto out_overflow;
4993 memcpy(fh->data, p, len);
4994 return 0;
4995out_overflow:
4996 print_overflow_msg(__func__, xdr);
4997 return -EIO;
4998}
4999
5000static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5001{
5002 int status;
5003
5004 status = decode_op_hdr(xdr, OP_LINK);
5005 if (status)
5006 return status;
5007 return decode_change_info(xdr, cinfo);
5008}
5009
5010/*
5011 * We create the owner, so we know a proper owner.id length is 4.
5012 */
5013static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5014{
5015 uint64_t offset, length, clientid;
5016 __be32 *p;
5017 uint32_t namelen, type;
5018
5019 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5020 if (unlikely(!p))
5021 goto out_overflow;
5022 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5023 p = xdr_decode_hyper(p, &length);
5024 type = be32_to_cpup(p++); /* 4 byte read */
5025 if (fl != NULL) { /* manipulate file lock */
5026 fl->fl_start = (loff_t)offset;
5027 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5028 if (length == ~(uint64_t)0)
5029 fl->fl_end = OFFSET_MAX;
5030 fl->fl_type = F_WRLCK;
5031 if (type & 1)
5032 fl->fl_type = F_RDLCK;
5033 fl->fl_pid = 0;
5034 }
5035 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5036 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
5037 p = xdr_inline_decode(xdr, namelen); /* variable size field */
5038 if (likely(p))
5039 return -NFS4ERR_DENIED;
5040out_overflow:
5041 print_overflow_msg(__func__, xdr);
5042 return -EIO;
5043}
5044
5045static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5046{
5047 int status;
5048
5049 status = decode_op_hdr(xdr, OP_LOCK);
5050 if (status == -EIO)
5051 goto out;
5052 if (status == 0) {
5053 status = decode_lock_stateid(xdr, &res->stateid);
5054 if (unlikely(status))
5055 goto out;
5056 } else if (status == -NFS4ERR_DENIED)
5057 status = decode_lock_denied(xdr, NULL);
5058 if (res->open_seqid != NULL)
5059 nfs_increment_open_seqid(status, res->open_seqid);
5060 nfs_increment_lock_seqid(status, res->lock_seqid);
5061out:
5062 return status;
5063}
5064
5065static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5066{
5067 int status;
5068 status = decode_op_hdr(xdr, OP_LOCKT);
5069 if (status == -NFS4ERR_DENIED)
5070 return decode_lock_denied(xdr, res->denied);
5071 return status;
5072}
5073
5074static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5075{
5076 int status;
5077
5078 status = decode_op_hdr(xdr, OP_LOCKU);
5079 if (status != -EIO)
5080 nfs_increment_lock_seqid(status, res->seqid);
5081 if (status == 0)
5082 status = decode_lock_stateid(xdr, &res->stateid);
5083 return status;
5084}
5085
5086static int decode_release_lockowner(struct xdr_stream *xdr)
5087{
5088 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5089}
5090
5091static int decode_lookup(struct xdr_stream *xdr)
5092{
5093 return decode_op_hdr(xdr, OP_LOOKUP);
5094}
5095
5096static int decode_lookupp(struct xdr_stream *xdr)
5097{
5098 return decode_op_hdr(xdr, OP_LOOKUPP);
5099}
5100
5101/* This is too sick! */
5102static int decode_space_limit(struct xdr_stream *xdr,
5103 unsigned long *pagemod_limit)
5104{
5105 __be32 *p;
5106 uint32_t limit_type, nblocks, blocksize;
5107 u64 maxsize = 0;
5108
5109 p = xdr_inline_decode(xdr, 12);
5110 if (unlikely(!p))
5111 goto out_overflow;
5112 limit_type = be32_to_cpup(p++);
5113 switch (limit_type) {
5114 case NFS4_LIMIT_SIZE:
5115 xdr_decode_hyper(p, &maxsize);
5116 break;
5117 case NFS4_LIMIT_BLOCKS:
5118 nblocks = be32_to_cpup(p++);
5119 blocksize = be32_to_cpup(p);
5120 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5121 }
5122 maxsize >>= PAGE_SHIFT;
5123 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5124 return 0;
5125out_overflow:
5126 print_overflow_msg(__func__, xdr);
5127 return -EIO;
5128}
5129
5130static int decode_rw_delegation(struct xdr_stream *xdr,
5131 uint32_t delegation_type,
5132 struct nfs_openres *res)
5133{
5134 __be32 *p;
5135 int status;
5136
5137 status = decode_delegation_stateid(xdr, &res->delegation);
5138 if (unlikely(status))
5139 return status;
5140 p = xdr_inline_decode(xdr, 4);
5141 if (unlikely(!p))
5142 goto out_overflow;
5143 res->do_recall = be32_to_cpup(p);
5144
5145 switch (delegation_type) {
5146 case NFS4_OPEN_DELEGATE_READ:
5147 res->delegation_type = FMODE_READ;
5148 break;
5149 case NFS4_OPEN_DELEGATE_WRITE:
5150 res->delegation_type = FMODE_WRITE|FMODE_READ;
5151 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5152 return -EIO;
5153 }
5154 return decode_ace(xdr, NULL);
5155out_overflow:
5156 print_overflow_msg(__func__, xdr);
5157 return -EIO;
5158}
5159
5160static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5161{
5162 __be32 *p;
5163 uint32_t why_no_delegation;
5164
5165 p = xdr_inline_decode(xdr, 4);
5166 if (unlikely(!p))
5167 goto out_overflow;
5168 why_no_delegation = be32_to_cpup(p);
5169 switch (why_no_delegation) {
5170 case WND4_CONTENTION:
5171 case WND4_RESOURCE:
5172 xdr_inline_decode(xdr, 4);
5173 /* Ignore for now */
5174 }
5175 return 0;
5176out_overflow:
5177 print_overflow_msg(__func__, xdr);
5178 return -EIO;
5179}
5180
5181static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5182{
5183 __be32 *p;
5184 uint32_t delegation_type;
5185
5186 p = xdr_inline_decode(xdr, 4);
5187 if (unlikely(!p))
5188 goto out_overflow;
5189 delegation_type = be32_to_cpup(p);
5190 res->delegation_type = 0;
5191 switch (delegation_type) {
5192 case NFS4_OPEN_DELEGATE_NONE:
5193 return 0;
5194 case NFS4_OPEN_DELEGATE_READ:
5195 case NFS4_OPEN_DELEGATE_WRITE:
5196 return decode_rw_delegation(xdr, delegation_type, res);
5197 case NFS4_OPEN_DELEGATE_NONE_EXT:
5198 return decode_no_delegation(xdr, res);
5199 }
5200 return -EIO;
5201out_overflow:
5202 print_overflow_msg(__func__, xdr);
5203 return -EIO;
5204}
5205
5206static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5207{
5208 __be32 *p;
5209 uint32_t savewords, bmlen, i;
5210 int status;
5211
5212 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5213 return status;
5214 nfs_increment_open_seqid(status, res->seqid);
5215 if (status)
5216 return status;
5217 status = decode_open_stateid(xdr, &res->stateid);
5218 if (unlikely(status))
5219 return status;
5220
5221 decode_change_info(xdr, &res->cinfo);
5222
5223 p = xdr_inline_decode(xdr, 8);
5224 if (unlikely(!p))
5225 goto out_overflow;
5226 res->rflags = be32_to_cpup(p++);
5227 bmlen = be32_to_cpup(p);
5228 if (bmlen > 10)
5229 goto xdr_error;
5230
5231 p = xdr_inline_decode(xdr, bmlen << 2);
5232 if (unlikely(!p))
5233 goto out_overflow;
5234 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5235 for (i = 0; i < savewords; ++i)
5236 res->attrset[i] = be32_to_cpup(p++);
5237 for (; i < NFS4_BITMAP_SIZE; i++)
5238 res->attrset[i] = 0;
5239
5240 return decode_delegation(xdr, res);
5241xdr_error:
5242 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5243 return -EIO;
5244out_overflow:
5245 print_overflow_msg(__func__, xdr);
5246 return -EIO;
5247}
5248
5249static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5250{
5251 int status;
5252
5253 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5254 if (status != -EIO)
5255 nfs_increment_open_seqid(status, res->seqid);
5256 if (!status)
5257 status = decode_open_stateid(xdr, &res->stateid);
5258 return status;
5259}
5260
5261static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5262{
5263 int status;
5264
5265 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5266 if (status != -EIO)
5267 nfs_increment_open_seqid(status, res->seqid);
5268 if (!status)
5269 status = decode_open_stateid(xdr, &res->stateid);
5270 return status;
5271}
5272
5273static int decode_putfh(struct xdr_stream *xdr)
5274{
5275 return decode_op_hdr(xdr, OP_PUTFH);
5276}
5277
5278static int decode_putrootfh(struct xdr_stream *xdr)
5279{
5280 return decode_op_hdr(xdr, OP_PUTROOTFH);
5281}
5282
5283static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5284 struct nfs_pgio_res *res)
5285{
5286 __be32 *p;
5287 uint32_t count, eof, recvd;
5288 int status;
5289
5290 status = decode_op_hdr(xdr, OP_READ);
5291 if (status)
5292 return status;
5293 p = xdr_inline_decode(xdr, 8);
5294 if (unlikely(!p))
5295 goto out_overflow;
5296 eof = be32_to_cpup(p++);
5297 count = be32_to_cpup(p);
5298 recvd = xdr_read_pages(xdr, count);
5299 if (count > recvd) {
5300 dprintk("NFS: server cheating in read reply: "
5301 "count %u > recvd %u\n", count, recvd);
5302 count = recvd;
5303 eof = 0;
5304 }
5305 res->eof = eof;
5306 res->count = count;
5307 return 0;
5308out_overflow:
5309 print_overflow_msg(__func__, xdr);
5310 return -EIO;
5311}
5312
5313static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5314{
5315 int status;
5316 __be32 verf[2];
5317
5318 status = decode_op_hdr(xdr, OP_READDIR);
5319 if (!status)
5320 status = decode_verifier(xdr, readdir->verifier.data);
5321 if (unlikely(status))
5322 return status;
5323 memcpy(verf, readdir->verifier.data, sizeof(verf));
5324 dprintk("%s: verifier = %08x:%08x\n",
5325 __func__, verf[0], verf[1]);
5326 return xdr_read_pages(xdr, xdr->buf->page_len);
5327}
5328
5329static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5330{
5331 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5332 u32 len, recvd;
5333 __be32 *p;
5334 int status;
5335
5336 status = decode_op_hdr(xdr, OP_READLINK);
5337 if (status)
5338 return status;
5339
5340 /* Convert length of symlink */
5341 p = xdr_inline_decode(xdr, 4);
5342 if (unlikely(!p))
5343 goto out_overflow;
5344 len = be32_to_cpup(p);
5345 if (len >= rcvbuf->page_len || len <= 0) {
5346 dprintk("nfs: server returned giant symlink!\n");
5347 return -ENAMETOOLONG;
5348 }
5349 recvd = xdr_read_pages(xdr, len);
5350 if (recvd < len) {
5351 dprintk("NFS: server cheating in readlink reply: "
5352 "count %u > recvd %u\n", len, recvd);
5353 return -EIO;
5354 }
5355 /*
5356 * The XDR encode routine has set things up so that
5357 * the link text will be copied directly into the
5358 * buffer. We just have to do overflow-checking,
5359 * and and null-terminate the text (the VFS expects
5360 * null-termination).
5361 */
5362 xdr_terminate_string(rcvbuf, len);
5363 return 0;
5364out_overflow:
5365 print_overflow_msg(__func__, xdr);
5366 return -EIO;
5367}
5368
5369static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5370{
5371 int status;
5372
5373 status = decode_op_hdr(xdr, OP_REMOVE);
5374 if (status)
5375 goto out;
5376 status = decode_change_info(xdr, cinfo);
5377out:
5378 return status;
5379}
5380
5381static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5382 struct nfs4_change_info *new_cinfo)
5383{
5384 int status;
5385
5386 status = decode_op_hdr(xdr, OP_RENAME);
5387 if (status)
5388 goto out;
5389 if ((status = decode_change_info(xdr, old_cinfo)))
5390 goto out;
5391 status = decode_change_info(xdr, new_cinfo);
5392out:
5393 return status;
5394}
5395
5396static int decode_renew(struct xdr_stream *xdr)
5397{
5398 return decode_op_hdr(xdr, OP_RENEW);
5399}
5400
5401static int
5402decode_restorefh(struct xdr_stream *xdr)
5403{
5404 return decode_op_hdr(xdr, OP_RESTOREFH);
5405}
5406
5407static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5408 struct nfs_getaclres *res)
5409{
5410 unsigned int savep;
5411 uint32_t attrlen,
5412 bitmap[3] = {0};
5413 int status;
5414 unsigned int pg_offset;
5415
5416 res->acl_len = 0;
5417 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5418 goto out;
5419
5420 xdr_enter_page(xdr, xdr->buf->page_len);
5421
5422 /* Calculate the offset of the page data */
5423 pg_offset = xdr->buf->head[0].iov_len;
5424
5425 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5426 goto out;
5427 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5428 goto out;
5429
5430 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5431 return -EIO;
5432 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5433
5434 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5435 * are stored with the acl data to handle the problem of
5436 * variable length bitmaps.*/
5437 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5438 res->acl_len = attrlen;
5439
5440 /* Check for receive buffer overflow */
5441 if (res->acl_len > (xdr->nwords << 2) ||
5442 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5443 res->acl_flags |= NFS4_ACL_TRUNC;
5444 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5445 attrlen, xdr->nwords << 2);
5446 }
5447 } else
5448 status = -EOPNOTSUPP;
5449
5450out:
5451 return status;
5452}
5453
5454static int
5455decode_savefh(struct xdr_stream *xdr)
5456{
5457 return decode_op_hdr(xdr, OP_SAVEFH);
5458}
5459
5460static int decode_setattr(struct xdr_stream *xdr)
5461{
5462 int status;
5463
5464 status = decode_op_hdr(xdr, OP_SETATTR);
5465 if (status)
5466 return status;
5467 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5468 return 0;
5469 print_overflow_msg(__func__, xdr);
5470 return -EIO;
5471}
5472
5473static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5474{
5475 __be32 *p;
5476 uint32_t opnum;
5477 int32_t nfserr;
5478
5479 p = xdr_inline_decode(xdr, 8);
5480 if (unlikely(!p))
5481 goto out_overflow;
5482 opnum = be32_to_cpup(p++);
5483 if (opnum != OP_SETCLIENTID) {
5484 dprintk("nfs: decode_setclientid: Server returned operation"
5485 " %d\n", opnum);
5486 return -EIO;
5487 }
5488 nfserr = be32_to_cpup(p);
5489 if (nfserr == NFS_OK) {
5490 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5491 if (unlikely(!p))
5492 goto out_overflow;
5493 p = xdr_decode_hyper(p, &res->clientid);
5494 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5495 } else if (nfserr == NFSERR_CLID_INUSE) {
5496 uint32_t len;
5497
5498 /* skip netid string */
5499 p = xdr_inline_decode(xdr, 4);
5500 if (unlikely(!p))
5501 goto out_overflow;
5502 len = be32_to_cpup(p);
5503 p = xdr_inline_decode(xdr, len);
5504 if (unlikely(!p))
5505 goto out_overflow;
5506
5507 /* skip uaddr string */
5508 p = xdr_inline_decode(xdr, 4);
5509 if (unlikely(!p))
5510 goto out_overflow;
5511 len = be32_to_cpup(p);
5512 p = xdr_inline_decode(xdr, len);
5513 if (unlikely(!p))
5514 goto out_overflow;
5515 return -NFSERR_CLID_INUSE;
5516 } else
5517 return nfs4_stat_to_errno(nfserr);
5518
5519 return 0;
5520out_overflow:
5521 print_overflow_msg(__func__, xdr);
5522 return -EIO;
5523}
5524
5525static int decode_setclientid_confirm(struct xdr_stream *xdr)
5526{
5527 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5528}
5529
5530static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5531{
5532 __be32 *p;
5533 int status;
5534
5535 status = decode_op_hdr(xdr, OP_WRITE);
5536 if (status)
5537 return status;
5538
5539 p = xdr_inline_decode(xdr, 8);
5540 if (unlikely(!p))
5541 goto out_overflow;
5542 res->count = be32_to_cpup(p++);
5543 res->verf->committed = be32_to_cpup(p++);
5544 return decode_write_verifier(xdr, &res->verf->verifier);
5545out_overflow:
5546 print_overflow_msg(__func__, xdr);
5547 return -EIO;
5548}
5549
5550static int decode_delegreturn(struct xdr_stream *xdr)
5551{
5552 return decode_op_hdr(xdr, OP_DELEGRETURN);
5553}
5554
5555static int decode_secinfo_gss(struct xdr_stream *xdr,
5556 struct nfs4_secinfo4 *flavor)
5557{
5558 u32 oid_len;
5559 __be32 *p;
5560
5561 p = xdr_inline_decode(xdr, 4);
5562 if (unlikely(!p))
5563 goto out_overflow;
5564 oid_len = be32_to_cpup(p);
5565 if (oid_len > GSS_OID_MAX_LEN)
5566 goto out_err;
5567
5568 p = xdr_inline_decode(xdr, oid_len);
5569 if (unlikely(!p))
5570 goto out_overflow;
5571 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5572 flavor->flavor_info.oid.len = oid_len;
5573
5574 p = xdr_inline_decode(xdr, 8);
5575 if (unlikely(!p))
5576 goto out_overflow;
5577 flavor->flavor_info.qop = be32_to_cpup(p++);
5578 flavor->flavor_info.service = be32_to_cpup(p);
5579
5580 return 0;
5581
5582out_overflow:
5583 print_overflow_msg(__func__, xdr);
5584 return -EIO;
5585out_err:
5586 return -EINVAL;
5587}
5588
5589static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5590{
5591 struct nfs4_secinfo4 *sec_flavor;
5592 unsigned int i, num_flavors;
5593 int status;
5594 __be32 *p;
5595
5596 p = xdr_inline_decode(xdr, 4);
5597 if (unlikely(!p))
5598 goto out_overflow;
5599
5600 res->flavors->num_flavors = 0;
5601 num_flavors = be32_to_cpup(p);
5602
5603 for (i = 0; i < num_flavors; i++) {
5604 sec_flavor = &res->flavors->flavors[i];
5605 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5606 break;
5607
5608 p = xdr_inline_decode(xdr, 4);
5609 if (unlikely(!p))
5610 goto out_overflow;
5611 sec_flavor->flavor = be32_to_cpup(p);
5612
5613 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5614 status = decode_secinfo_gss(xdr, sec_flavor);
5615 if (status)
5616 goto out;
5617 }
5618 res->flavors->num_flavors++;
5619 }
5620
5621 status = 0;
5622out:
5623 return status;
5624out_overflow:
5625 print_overflow_msg(__func__, xdr);
5626 return -EIO;
5627}
5628
5629static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5630{
5631 int status = decode_op_hdr(xdr, OP_SECINFO);
5632 if (status)
5633 return status;
5634 return decode_secinfo_common(xdr, res);
5635}
5636
5637#if defined(CONFIG_NFS_V4_1)
5638static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5639{
5640 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5641 if (status)
5642 return status;
5643 return decode_secinfo_common(xdr, res);
5644}
5645
5646static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5647{
5648 __be32 *p;
5649 uint32_t bitmap_words;
5650 unsigned int i;
5651
5652 p = xdr_inline_decode(xdr, 4);
5653 if (!p)
5654 return -EIO;
5655 bitmap_words = be32_to_cpup(p++);
5656 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5657 return -EIO;
5658 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5659 for (i = 0; i < bitmap_words; i++)
5660 op_map->u.words[i] = be32_to_cpup(p++);
5661
5662 return 0;
5663}
5664
5665static int decode_exchange_id(struct xdr_stream *xdr,
5666 struct nfs41_exchange_id_res *res)
5667{
5668 __be32 *p;
5669 uint32_t dummy;
5670 char *dummy_str;
5671 int status;
5672 uint32_t impl_id_count;
5673
5674 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5675 if (status)
5676 return status;
5677
5678 p = xdr_inline_decode(xdr, 8);
5679 if (unlikely(!p))
5680 goto out_overflow;
5681 xdr_decode_hyper(p, &res->clientid);
5682 p = xdr_inline_decode(xdr, 12);
5683 if (unlikely(!p))
5684 goto out_overflow;
5685 res->seqid = be32_to_cpup(p++);
5686 res->flags = be32_to_cpup(p++);
5687
5688 res->state_protect.how = be32_to_cpup(p);
5689 switch (res->state_protect.how) {
5690 case SP4_NONE:
5691 break;
5692 case SP4_MACH_CRED:
5693 status = decode_op_map(xdr, &res->state_protect.enforce);
5694 if (status)
5695 return status;
5696 status = decode_op_map(xdr, &res->state_protect.allow);
5697 if (status)
5698 return status;
5699 break;
5700 default:
5701 WARN_ON_ONCE(1);
5702 return -EIO;
5703 }
5704
5705 /* server_owner4.so_minor_id */
5706 p = xdr_inline_decode(xdr, 8);
5707 if (unlikely(!p))
5708 goto out_overflow;
5709 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5710
5711 /* server_owner4.so_major_id */
5712 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5713 if (unlikely(status))
5714 return status;
5715 memcpy(res->server_owner->major_id, dummy_str, dummy);
5716 res->server_owner->major_id_sz = dummy;
5717
5718 /* server_scope4 */
5719 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5720 if (unlikely(status))
5721 return status;
5722 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5723 res->server_scope->server_scope_sz = dummy;
5724
5725 /* Implementation Id */
5726 p = xdr_inline_decode(xdr, 4);
5727 if (unlikely(!p))
5728 goto out_overflow;
5729 impl_id_count = be32_to_cpup(p++);
5730
5731 if (impl_id_count) {
5732 /* nii_domain */
5733 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5734 if (unlikely(status))
5735 return status;
5736 memcpy(res->impl_id->domain, dummy_str, dummy);
5737
5738 /* nii_name */
5739 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740 if (unlikely(status))
5741 return status;
5742 memcpy(res->impl_id->name, dummy_str, dummy);
5743
5744 /* nii_date */
5745 p = xdr_inline_decode(xdr, 12);
5746 if (unlikely(!p))
5747 goto out_overflow;
5748 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5749 res->impl_id->date.nseconds = be32_to_cpup(p);
5750
5751 /* if there's more than one entry, ignore the rest */
5752 }
5753 return 0;
5754out_overflow:
5755 print_overflow_msg(__func__, xdr);
5756 return -EIO;
5757}
5758
5759static int decode_chan_attrs(struct xdr_stream *xdr,
5760 struct nfs4_channel_attrs *attrs)
5761{
5762 __be32 *p;
5763 u32 nr_attrs, val;
5764
5765 p = xdr_inline_decode(xdr, 28);
5766 if (unlikely(!p))
5767 goto out_overflow;
5768 val = be32_to_cpup(p++); /* headerpadsz */
5769 if (val)
5770 return -EINVAL; /* no support for header padding yet */
5771 attrs->max_rqst_sz = be32_to_cpup(p++);
5772 attrs->max_resp_sz = be32_to_cpup(p++);
5773 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5774 attrs->max_ops = be32_to_cpup(p++);
5775 attrs->max_reqs = be32_to_cpup(p++);
5776 nr_attrs = be32_to_cpup(p);
5777 if (unlikely(nr_attrs > 1)) {
5778 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5779 "count %u\n", __func__, nr_attrs);
5780 return -EINVAL;
5781 }
5782 if (nr_attrs == 1) {
5783 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5784 if (unlikely(!p))
5785 goto out_overflow;
5786 }
5787 return 0;
5788out_overflow:
5789 print_overflow_msg(__func__, xdr);
5790 return -EIO;
5791}
5792
5793static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5794{
5795 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5796}
5797
5798static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5799 struct nfs41_bind_conn_to_session_res *res)
5800{
5801 __be32 *p;
5802 int status;
5803
5804 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5805 if (!status)
5806 status = decode_sessionid(xdr, &res->sessionid);
5807 if (unlikely(status))
5808 return status;
5809
5810 /* dir flags, rdma mode bool */
5811 p = xdr_inline_decode(xdr, 8);
5812 if (unlikely(!p))
5813 goto out_overflow;
5814
5815 res->dir = be32_to_cpup(p++);
5816 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5817 return -EIO;
5818 if (be32_to_cpup(p) == 0)
5819 res->use_conn_in_rdma_mode = false;
5820 else
5821 res->use_conn_in_rdma_mode = true;
5822
5823 return 0;
5824out_overflow:
5825 print_overflow_msg(__func__, xdr);
5826 return -EIO;
5827}
5828
5829static int decode_create_session(struct xdr_stream *xdr,
5830 struct nfs41_create_session_res *res)
5831{
5832 __be32 *p;
5833 int status;
5834
5835 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5836 if (!status)
5837 status = decode_sessionid(xdr, &res->sessionid);
5838 if (unlikely(status))
5839 return status;
5840
5841 /* seqid, flags */
5842 p = xdr_inline_decode(xdr, 8);
5843 if (unlikely(!p))
5844 goto out_overflow;
5845 res->seqid = be32_to_cpup(p++);
5846 res->flags = be32_to_cpup(p);
5847
5848 /* Channel attributes */
5849 status = decode_chan_attrs(xdr, &res->fc_attrs);
5850 if (!status)
5851 status = decode_chan_attrs(xdr, &res->bc_attrs);
5852 return status;
5853out_overflow:
5854 print_overflow_msg(__func__, xdr);
5855 return -EIO;
5856}
5857
5858static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5859{
5860 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5861}
5862
5863static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5864{
5865 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5866}
5867
5868static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5869{
5870 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5871}
5872#endif /* CONFIG_NFS_V4_1 */
5873
5874static int decode_sequence(struct xdr_stream *xdr,
5875 struct nfs4_sequence_res *res,
5876 struct rpc_rqst *rqstp)
5877{
5878#if defined(CONFIG_NFS_V4_1)
5879 struct nfs4_session *session;
5880 struct nfs4_sessionid id;
5881 u32 dummy;
5882 int status;
5883 __be32 *p;
5884
5885 if (res->sr_slot == NULL)
5886 return 0;
5887 if (!res->sr_slot->table->session)
5888 return 0;
5889
5890 status = decode_op_hdr(xdr, OP_SEQUENCE);
5891 if (!status)
5892 status = decode_sessionid(xdr, &id);
5893 if (unlikely(status))
5894 goto out_err;
5895
5896 /*
5897 * If the server returns different values for sessionID, slotID or
5898 * sequence number, the server is looney tunes.
5899 */
5900 status = -EREMOTEIO;
5901 session = res->sr_slot->table->session;
5902
5903 if (memcmp(id.data, session->sess_id.data,
5904 NFS4_MAX_SESSIONID_LEN)) {
5905 dprintk("%s Invalid session id\n", __func__);
5906 goto out_err;
5907 }
5908
5909 p = xdr_inline_decode(xdr, 20);
5910 if (unlikely(!p))
5911 goto out_overflow;
5912
5913 /* seqid */
5914 dummy = be32_to_cpup(p++);
5915 if (dummy != res->sr_slot->seq_nr) {
5916 dprintk("%s Invalid sequence number\n", __func__);
5917 goto out_err;
5918 }
5919 /* slot id */
5920 dummy = be32_to_cpup(p++);
5921 if (dummy != res->sr_slot->slot_nr) {
5922 dprintk("%s Invalid slot id\n", __func__);
5923 goto out_err;
5924 }
5925 /* highest slot id */
5926 res->sr_highest_slotid = be32_to_cpup(p++);
5927 /* target highest slot id */
5928 res->sr_target_highest_slotid = be32_to_cpup(p++);
5929 /* result flags */
5930 res->sr_status_flags = be32_to_cpup(p);
5931 status = 0;
5932out_err:
5933 res->sr_status = status;
5934 return status;
5935out_overflow:
5936 print_overflow_msg(__func__, xdr);
5937 status = -EIO;
5938 goto out_err;
5939#else /* CONFIG_NFS_V4_1 */
5940 return 0;
5941#endif /* CONFIG_NFS_V4_1 */
5942}
5943
5944#if defined(CONFIG_NFS_V4_1)
5945static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5946{
5947 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5948 return decode_stateid(xdr, stateid);
5949}
5950
5951static int decode_getdeviceinfo(struct xdr_stream *xdr,
5952 struct nfs4_getdeviceinfo_res *res)
5953{
5954 struct pnfs_device *pdev = res->pdev;
5955 __be32 *p;
5956 uint32_t len, type;
5957 int status;
5958
5959 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5960 if (status) {
5961 if (status == -ETOOSMALL) {
5962 p = xdr_inline_decode(xdr, 4);
5963 if (unlikely(!p))
5964 goto out_overflow;
5965 pdev->mincount = be32_to_cpup(p);
5966 dprintk("%s: Min count too small. mincnt = %u\n",
5967 __func__, pdev->mincount);
5968 }
5969 return status;
5970 }
5971
5972 p = xdr_inline_decode(xdr, 8);
5973 if (unlikely(!p))
5974 goto out_overflow;
5975 type = be32_to_cpup(p++);
5976 if (type != pdev->layout_type) {
5977 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5978 __func__, pdev->layout_type, type);
5979 return -EINVAL;
5980 }
5981 /*
5982 * Get the length of the opaque device_addr4. xdr_read_pages places
5983 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5984 * and places the remaining xdr data in xdr_buf->tail
5985 */
5986 pdev->mincount = be32_to_cpup(p);
5987 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5988 goto out_overflow;
5989
5990 /* Parse notification bitmap, verifying that it is zero. */
5991 p = xdr_inline_decode(xdr, 4);
5992 if (unlikely(!p))
5993 goto out_overflow;
5994 len = be32_to_cpup(p);
5995 if (len) {
5996 uint32_t i;
5997
5998 p = xdr_inline_decode(xdr, 4 * len);
5999 if (unlikely(!p))
6000 goto out_overflow;
6001
6002 res->notification = be32_to_cpup(p++);
6003 for (i = 1; i < len; i++) {
6004 if (be32_to_cpup(p++)) {
6005 dprintk("%s: unsupported notification\n",
6006 __func__);
6007 return -EIO;
6008 }
6009 }
6010 }
6011 return 0;
6012out_overflow:
6013 print_overflow_msg(__func__, xdr);
6014 return -EIO;
6015}
6016
6017static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6018 struct nfs4_layoutget_res *res)
6019{
6020 __be32 *p;
6021 int status;
6022 u32 layout_count;
6023 u32 recvd;
6024
6025 status = decode_op_hdr(xdr, OP_LAYOUTGET);
6026 if (status)
6027 return status;
6028 p = xdr_inline_decode(xdr, 4);
6029 if (unlikely(!p))
6030 goto out_overflow;
6031 res->return_on_close = be32_to_cpup(p);
6032 decode_layout_stateid(xdr, &res->stateid);
6033 p = xdr_inline_decode(xdr, 4);
6034 if (unlikely(!p))
6035 goto out_overflow;
6036 layout_count = be32_to_cpup(p);
6037 if (!layout_count) {
6038 dprintk("%s: server responded with empty layout array\n",
6039 __func__);
6040 return -EINVAL;
6041 }
6042
6043 p = xdr_inline_decode(xdr, 28);
6044 if (unlikely(!p))
6045 goto out_overflow;
6046 p = xdr_decode_hyper(p, &res->range.offset);
6047 p = xdr_decode_hyper(p, &res->range.length);
6048 res->range.iomode = be32_to_cpup(p++);
6049 res->type = be32_to_cpup(p++);
6050 res->layoutp->len = be32_to_cpup(p);
6051
6052 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6053 __func__,
6054 (unsigned long)res->range.offset,
6055 (unsigned long)res->range.length,
6056 res->range.iomode,
6057 res->type,
6058 res->layoutp->len);
6059
6060 recvd = xdr_read_pages(xdr, res->layoutp->len);
6061 if (res->layoutp->len > recvd) {
6062 dprintk("NFS: server cheating in layoutget reply: "
6063 "layout len %u > recvd %u\n",
6064 res->layoutp->len, recvd);
6065 return -EINVAL;
6066 }
6067
6068 if (layout_count > 1) {
6069 /* We only handle a length one array at the moment. Any
6070 * further entries are just ignored. Note that this means
6071 * the client may see a response that is less than the
6072 * minimum it requested.
6073 */
6074 dprintk("%s: server responded with %d layouts, dropping tail\n",
6075 __func__, layout_count);
6076 }
6077
6078 return 0;
6079out_overflow:
6080 print_overflow_msg(__func__, xdr);
6081 return -EIO;
6082}
6083
6084static int decode_layoutreturn(struct xdr_stream *xdr,
6085 struct nfs4_layoutreturn_res *res)
6086{
6087 __be32 *p;
6088 int status;
6089
6090 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6091 if (status)
6092 return status;
6093 p = xdr_inline_decode(xdr, 4);
6094 if (unlikely(!p))
6095 goto out_overflow;
6096 res->lrs_present = be32_to_cpup(p);
6097 if (res->lrs_present)
6098 status = decode_layout_stateid(xdr, &res->stateid);
6099 else
6100 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6101 return status;
6102out_overflow:
6103 print_overflow_msg(__func__, xdr);
6104 return -EIO;
6105}
6106
6107static int decode_layoutcommit(struct xdr_stream *xdr,
6108 struct rpc_rqst *req,
6109 struct nfs4_layoutcommit_res *res)
6110{
6111 __be32 *p;
6112 __u32 sizechanged;
6113 int status;
6114
6115 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6116 res->status = status;
6117 if (status)
6118 return status;
6119
6120 p = xdr_inline_decode(xdr, 4);
6121 if (unlikely(!p))
6122 goto out_overflow;
6123 sizechanged = be32_to_cpup(p);
6124
6125 if (sizechanged) {
6126 /* throw away new size */
6127 p = xdr_inline_decode(xdr, 8);
6128 if (unlikely(!p))
6129 goto out_overflow;
6130 }
6131 return 0;
6132out_overflow:
6133 print_overflow_msg(__func__, xdr);
6134 return -EIO;
6135}
6136
6137static int decode_test_stateid(struct xdr_stream *xdr,
6138 struct nfs41_test_stateid_res *res)
6139{
6140 __be32 *p;
6141 int status;
6142 int num_res;
6143
6144 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6145 if (status)
6146 return status;
6147
6148 p = xdr_inline_decode(xdr, 4);
6149 if (unlikely(!p))
6150 goto out_overflow;
6151 num_res = be32_to_cpup(p++);
6152 if (num_res != 1)
6153 goto out;
6154
6155 p = xdr_inline_decode(xdr, 4);
6156 if (unlikely(!p))
6157 goto out_overflow;
6158 res->status = be32_to_cpup(p++);
6159
6160 return status;
6161out_overflow:
6162 print_overflow_msg(__func__, xdr);
6163out:
6164 return -EIO;
6165}
6166
6167static int decode_free_stateid(struct xdr_stream *xdr,
6168 struct nfs41_free_stateid_res *res)
6169{
6170 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6171 return res->status;
6172}
6173#else
6174static inline
6175int decode_layoutreturn(struct xdr_stream *xdr,
6176 struct nfs4_layoutreturn_res *res)
6177{
6178 return 0;
6179}
6180#endif /* CONFIG_NFS_V4_1 */
6181
6182/*
6183 * END OF "GENERIC" DECODE ROUTINES.
6184 */
6185
6186/*
6187 * Decode OPEN_DOWNGRADE response
6188 */
6189static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6190 struct xdr_stream *xdr,
6191 void *data)
6192{
6193 struct nfs_closeres *res = data;
6194 struct compound_hdr hdr;
6195 int status;
6196
6197 status = decode_compound_hdr(xdr, &hdr);
6198 if (status)
6199 goto out;
6200 status = decode_sequence(xdr, &res->seq_res, rqstp);
6201 if (status)
6202 goto out;
6203 status = decode_putfh(xdr);
6204 if (status)
6205 goto out;
6206 if (res->lr_res) {
6207 status = decode_layoutreturn(xdr, res->lr_res);
6208 res->lr_ret = status;
6209 if (status)
6210 goto out;
6211 }
6212 status = decode_open_downgrade(xdr, res);
6213out:
6214 return status;
6215}
6216
6217/*
6218 * Decode ACCESS response
6219 */
6220static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6221 void *data)
6222{
6223 struct nfs4_accessres *res = data;
6224 struct compound_hdr hdr;
6225 int status;
6226
6227 status = decode_compound_hdr(xdr, &hdr);
6228 if (status)
6229 goto out;
6230 status = decode_sequence(xdr, &res->seq_res, rqstp);
6231 if (status)
6232 goto out;
6233 status = decode_putfh(xdr);
6234 if (status != 0)
6235 goto out;
6236 status = decode_access(xdr, &res->supported, &res->access);
6237 if (status != 0)
6238 goto out;
6239 if (res->fattr)
6240 decode_getfattr(xdr, res->fattr, res->server);
6241out:
6242 return status;
6243}
6244
6245/*
6246 * Decode LOOKUP response
6247 */
6248static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249 void *data)
6250{
6251 struct nfs4_lookup_res *res = data;
6252 struct compound_hdr hdr;
6253 int status;
6254
6255 status = decode_compound_hdr(xdr, &hdr);
6256 if (status)
6257 goto out;
6258 status = decode_sequence(xdr, &res->seq_res, rqstp);
6259 if (status)
6260 goto out;
6261 status = decode_putfh(xdr);
6262 if (status)
6263 goto out;
6264 status = decode_lookup(xdr);
6265 if (status)
6266 goto out;
6267 status = decode_getfh(xdr, res->fh);
6268 if (status)
6269 goto out;
6270 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6271out:
6272 return status;
6273}
6274
6275/*
6276 * Decode LOOKUPP response
6277 */
6278static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279 void *data)
6280{
6281 struct nfs4_lookupp_res *res = data;
6282 struct compound_hdr hdr;
6283 int status;
6284
6285 status = decode_compound_hdr(xdr, &hdr);
6286 if (status)
6287 goto out;
6288 status = decode_sequence(xdr, &res->seq_res, rqstp);
6289 if (status)
6290 goto out;
6291 status = decode_putfh(xdr);
6292 if (status)
6293 goto out;
6294 status = decode_lookupp(xdr);
6295 if (status)
6296 goto out;
6297 status = decode_getfh(xdr, res->fh);
6298 if (status)
6299 goto out;
6300 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6301out:
6302 return status;
6303}
6304
6305/*
6306 * Decode LOOKUP_ROOT response
6307 */
6308static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6309 struct xdr_stream *xdr,
6310 void *data)
6311{
6312 struct nfs4_lookup_res *res = data;
6313 struct compound_hdr hdr;
6314 int status;
6315
6316 status = decode_compound_hdr(xdr, &hdr);
6317 if (status)
6318 goto out;
6319 status = decode_sequence(xdr, &res->seq_res, rqstp);
6320 if (status)
6321 goto out;
6322 status = decode_putrootfh(xdr);
6323 if (status)
6324 goto out;
6325 status = decode_getfh(xdr, res->fh);
6326 if (status == 0)
6327 status = decode_getfattr_label(xdr, res->fattr,
6328 res->label, res->server);
6329out:
6330 return status;
6331}
6332
6333/*
6334 * Decode REMOVE response
6335 */
6336static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6337 void *data)
6338{
6339 struct nfs_removeres *res = data;
6340 struct compound_hdr hdr;
6341 int status;
6342
6343 status = decode_compound_hdr(xdr, &hdr);
6344 if (status)
6345 goto out;
6346 status = decode_sequence(xdr, &res->seq_res, rqstp);
6347 if (status)
6348 goto out;
6349 status = decode_putfh(xdr);
6350 if (status)
6351 goto out;
6352 status = decode_remove(xdr, &res->cinfo);
6353out:
6354 return status;
6355}
6356
6357/*
6358 * Decode RENAME response
6359 */
6360static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6361 void *data)
6362{
6363 struct nfs_renameres *res = data;
6364 struct compound_hdr hdr;
6365 int status;
6366
6367 status = decode_compound_hdr(xdr, &hdr);
6368 if (status)
6369 goto out;
6370 status = decode_sequence(xdr, &res->seq_res, rqstp);
6371 if (status)
6372 goto out;
6373 status = decode_putfh(xdr);
6374 if (status)
6375 goto out;
6376 status = decode_savefh(xdr);
6377 if (status)
6378 goto out;
6379 status = decode_putfh(xdr);
6380 if (status)
6381 goto out;
6382 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6383out:
6384 return status;
6385}
6386
6387/*
6388 * Decode LINK response
6389 */
6390static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6391 void *data)
6392{
6393 struct nfs4_link_res *res = data;
6394 struct compound_hdr hdr;
6395 int status;
6396
6397 status = decode_compound_hdr(xdr, &hdr);
6398 if (status)
6399 goto out;
6400 status = decode_sequence(xdr, &res->seq_res, rqstp);
6401 if (status)
6402 goto out;
6403 status = decode_putfh(xdr);
6404 if (status)
6405 goto out;
6406 status = decode_savefh(xdr);
6407 if (status)
6408 goto out;
6409 status = decode_putfh(xdr);
6410 if (status)
6411 goto out;
6412 status = decode_link(xdr, &res->cinfo);
6413 if (status)
6414 goto out;
6415 /*
6416 * Note order: OP_LINK leaves the directory as the current
6417 * filehandle.
6418 */
6419 status = decode_restorefh(xdr);
6420 if (status)
6421 goto out;
6422 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6423out:
6424 return status;
6425}
6426
6427/*
6428 * Decode CREATE response
6429 */
6430static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431 void *data)
6432{
6433 struct nfs4_create_res *res = data;
6434 struct compound_hdr hdr;
6435 int status;
6436
6437 status = decode_compound_hdr(xdr, &hdr);
6438 if (status)
6439 goto out;
6440 status = decode_sequence(xdr, &res->seq_res, rqstp);
6441 if (status)
6442 goto out;
6443 status = decode_putfh(xdr);
6444 if (status)
6445 goto out;
6446 status = decode_create(xdr, &res->dir_cinfo);
6447 if (status)
6448 goto out;
6449 status = decode_getfh(xdr, res->fh);
6450 if (status)
6451 goto out;
6452 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6453out:
6454 return status;
6455}
6456
6457/*
6458 * Decode SYMLINK response
6459 */
6460static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6461 void *res)
6462{
6463 return nfs4_xdr_dec_create(rqstp, xdr, res);
6464}
6465
6466/*
6467 * Decode GETATTR response
6468 */
6469static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6470 void *data)
6471{
6472 struct nfs4_getattr_res *res = data;
6473 struct compound_hdr hdr;
6474 int status;
6475
6476 status = decode_compound_hdr(xdr, &hdr);
6477 if (status)
6478 goto out;
6479 status = decode_sequence(xdr, &res->seq_res, rqstp);
6480 if (status)
6481 goto out;
6482 status = decode_putfh(xdr);
6483 if (status)
6484 goto out;
6485 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6486out:
6487 return status;
6488}
6489
6490/*
6491 * Encode an SETACL request
6492 */
6493static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6494 const void *data)
6495{
6496 const struct nfs_setaclargs *args = data;
6497 struct compound_hdr hdr = {
6498 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6499 };
6500
6501 encode_compound_hdr(xdr, req, &hdr);
6502 encode_sequence(xdr, &args->seq_args, &hdr);
6503 encode_putfh(xdr, args->fh, &hdr);
6504 encode_setacl(xdr, args, &hdr);
6505 encode_nops(&hdr);
6506}
6507
6508/*
6509 * Decode SETACL response
6510 */
6511static int
6512nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6513 void *data)
6514{
6515 struct nfs_setaclres *res = data;
6516 struct compound_hdr hdr;
6517 int status;
6518
6519 status = decode_compound_hdr(xdr, &hdr);
6520 if (status)
6521 goto out;
6522 status = decode_sequence(xdr, &res->seq_res, rqstp);
6523 if (status)
6524 goto out;
6525 status = decode_putfh(xdr);
6526 if (status)
6527 goto out;
6528 status = decode_setattr(xdr);
6529out:
6530 return status;
6531}
6532
6533/*
6534 * Decode GETACL response
6535 */
6536static int
6537nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6538 void *data)
6539{
6540 struct nfs_getaclres *res = data;
6541 struct compound_hdr hdr;
6542 int status;
6543
6544 if (res->acl_scratch != NULL) {
6545 void *p = page_address(res->acl_scratch);
6546 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6547 }
6548 status = decode_compound_hdr(xdr, &hdr);
6549 if (status)
6550 goto out;
6551 status = decode_sequence(xdr, &res->seq_res, rqstp);
6552 if (status)
6553 goto out;
6554 status = decode_putfh(xdr);
6555 if (status)
6556 goto out;
6557 status = decode_getacl(xdr, rqstp, res);
6558
6559out:
6560 return status;
6561}
6562
6563/*
6564 * Decode CLOSE response
6565 */
6566static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6567 void *data)
6568{
6569 struct nfs_closeres *res = data;
6570 struct compound_hdr hdr;
6571 int status;
6572
6573 status = decode_compound_hdr(xdr, &hdr);
6574 if (status)
6575 goto out;
6576 status = decode_sequence(xdr, &res->seq_res, rqstp);
6577 if (status)
6578 goto out;
6579 status = decode_putfh(xdr);
6580 if (status)
6581 goto out;
6582 if (res->lr_res) {
6583 status = decode_layoutreturn(xdr, res->lr_res);
6584 res->lr_ret = status;
6585 if (status)
6586 goto out;
6587 }
6588 if (res->fattr != NULL) {
6589 status = decode_getfattr(xdr, res->fattr, res->server);
6590 if (status != 0)
6591 goto out;
6592 }
6593 status = decode_close(xdr, res);
6594out:
6595 return status;
6596}
6597
6598/*
6599 * Decode OPEN response
6600 */
6601static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602 void *data)
6603{
6604 struct nfs_openres *res = data;
6605 struct compound_hdr hdr;
6606 int status;
6607
6608 status = decode_compound_hdr(xdr, &hdr);
6609 if (status)
6610 goto out;
6611 status = decode_sequence(xdr, &res->seq_res, rqstp);
6612 if (status)
6613 goto out;
6614 status = decode_putfh(xdr);
6615 if (status)
6616 goto out;
6617 status = decode_open(xdr, res);
6618 if (status)
6619 goto out;
6620 status = decode_getfh(xdr, &res->fh);
6621 if (status)
6622 goto out;
6623 if (res->access_request)
6624 decode_access(xdr, &res->access_supported, &res->access_result);
6625 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6626out:
6627 return status;
6628}
6629
6630/*
6631 * Decode OPEN_CONFIRM response
6632 */
6633static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6634 struct xdr_stream *xdr,
6635 void *data)
6636{
6637 struct nfs_open_confirmres *res = data;
6638 struct compound_hdr hdr;
6639 int status;
6640
6641 status = decode_compound_hdr(xdr, &hdr);
6642 if (status)
6643 goto out;
6644 status = decode_putfh(xdr);
6645 if (status)
6646 goto out;
6647 status = decode_open_confirm(xdr, res);
6648out:
6649 return status;
6650}
6651
6652/*
6653 * Decode OPEN response
6654 */
6655static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6656 struct xdr_stream *xdr,
6657 void *data)
6658{
6659 struct nfs_openres *res = data;
6660 struct compound_hdr hdr;
6661 int status;
6662
6663 status = decode_compound_hdr(xdr, &hdr);
6664 if (status)
6665 goto out;
6666 status = decode_sequence(xdr, &res->seq_res, rqstp);
6667 if (status)
6668 goto out;
6669 status = decode_putfh(xdr);
6670 if (status)
6671 goto out;
6672 status = decode_open(xdr, res);
6673 if (status)
6674 goto out;
6675 if (res->access_request)
6676 decode_access(xdr, &res->access_supported, &res->access_result);
6677 decode_getfattr(xdr, res->f_attr, res->server);
6678out:
6679 return status;
6680}
6681
6682/*
6683 * Decode SETATTR response
6684 */
6685static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6686 struct xdr_stream *xdr,
6687 void *data)
6688{
6689 struct nfs_setattrres *res = data;
6690 struct compound_hdr hdr;
6691 int status;
6692
6693 status = decode_compound_hdr(xdr, &hdr);
6694 if (status)
6695 goto out;
6696 status = decode_sequence(xdr, &res->seq_res, rqstp);
6697 if (status)
6698 goto out;
6699 status = decode_putfh(xdr);
6700 if (status)
6701 goto out;
6702 status = decode_setattr(xdr);
6703 if (status)
6704 goto out;
6705 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6706out:
6707 return status;
6708}
6709
6710/*
6711 * Decode LOCK response
6712 */
6713static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6714 void *data)
6715{
6716 struct nfs_lock_res *res = data;
6717 struct compound_hdr hdr;
6718 int status;
6719
6720 status = decode_compound_hdr(xdr, &hdr);
6721 if (status)
6722 goto out;
6723 status = decode_sequence(xdr, &res->seq_res, rqstp);
6724 if (status)
6725 goto out;
6726 status = decode_putfh(xdr);
6727 if (status)
6728 goto out;
6729 status = decode_lock(xdr, res);
6730out:
6731 return status;
6732}
6733
6734/*
6735 * Decode LOCKT response
6736 */
6737static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6738 void *data)
6739{
6740 struct nfs_lockt_res *res = data;
6741 struct compound_hdr hdr;
6742 int status;
6743
6744 status = decode_compound_hdr(xdr, &hdr);
6745 if (status)
6746 goto out;
6747 status = decode_sequence(xdr, &res->seq_res, rqstp);
6748 if (status)
6749 goto out;
6750 status = decode_putfh(xdr);
6751 if (status)
6752 goto out;
6753 status = decode_lockt(xdr, res);
6754out:
6755 return status;
6756}
6757
6758/*
6759 * Decode LOCKU response
6760 */
6761static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6762 void *data)
6763{
6764 struct nfs_locku_res *res = data;
6765 struct compound_hdr hdr;
6766 int status;
6767
6768 status = decode_compound_hdr(xdr, &hdr);
6769 if (status)
6770 goto out;
6771 status = decode_sequence(xdr, &res->seq_res, rqstp);
6772 if (status)
6773 goto out;
6774 status = decode_putfh(xdr);
6775 if (status)
6776 goto out;
6777 status = decode_locku(xdr, res);
6778out:
6779 return status;
6780}
6781
6782static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6783 struct xdr_stream *xdr, void *dummy)
6784{
6785 struct compound_hdr hdr;
6786 int status;
6787
6788 status = decode_compound_hdr(xdr, &hdr);
6789 if (!status)
6790 status = decode_release_lockowner(xdr);
6791 return status;
6792}
6793
6794/*
6795 * Decode READLINK response
6796 */
6797static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6798 struct xdr_stream *xdr,
6799 void *data)
6800{
6801 struct nfs4_readlink_res *res = data;
6802 struct compound_hdr hdr;
6803 int status;
6804
6805 status = decode_compound_hdr(xdr, &hdr);
6806 if (status)
6807 goto out;
6808 status = decode_sequence(xdr, &res->seq_res, rqstp);
6809 if (status)
6810 goto out;
6811 status = decode_putfh(xdr);
6812 if (status)
6813 goto out;
6814 status = decode_readlink(xdr, rqstp);
6815out:
6816 return status;
6817}
6818
6819/*
6820 * Decode READDIR response
6821 */
6822static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6823 void *data)
6824{
6825 struct nfs4_readdir_res *res = data;
6826 struct compound_hdr hdr;
6827 int status;
6828
6829 status = decode_compound_hdr(xdr, &hdr);
6830 if (status)
6831 goto out;
6832 status = decode_sequence(xdr, &res->seq_res, rqstp);
6833 if (status)
6834 goto out;
6835 status = decode_putfh(xdr);
6836 if (status)
6837 goto out;
6838 status = decode_readdir(xdr, rqstp, res);
6839out:
6840 return status;
6841}
6842
6843/*
6844 * Decode Read response
6845 */
6846static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6847 void *data)
6848{
6849 struct nfs_pgio_res *res = data;
6850 struct compound_hdr hdr;
6851 int status;
6852
6853 status = decode_compound_hdr(xdr, &hdr);
6854 res->op_status = hdr.status;
6855 if (status)
6856 goto out;
6857 status = decode_sequence(xdr, &res->seq_res, rqstp);
6858 if (status)
6859 goto out;
6860 status = decode_putfh(xdr);
6861 if (status)
6862 goto out;
6863 status = decode_read(xdr, rqstp, res);
6864 if (!status)
6865 status = res->count;
6866out:
6867 return status;
6868}
6869
6870/*
6871 * Decode WRITE response
6872 */
6873static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6874 void *data)
6875{
6876 struct nfs_pgio_res *res = data;
6877 struct compound_hdr hdr;
6878 int status;
6879
6880 status = decode_compound_hdr(xdr, &hdr);
6881 res->op_status = hdr.status;
6882 if (status)
6883 goto out;
6884 status = decode_sequence(xdr, &res->seq_res, rqstp);
6885 if (status)
6886 goto out;
6887 status = decode_putfh(xdr);
6888 if (status)
6889 goto out;
6890 status = decode_write(xdr, res);
6891 if (status)
6892 goto out;
6893 if (res->fattr)
6894 decode_getfattr(xdr, res->fattr, res->server);
6895 if (!status)
6896 status = res->count;
6897out:
6898 return status;
6899}
6900
6901/*
6902 * Decode COMMIT response
6903 */
6904static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6905 void *data)
6906{
6907 struct nfs_commitres *res = data;
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 status = decode_compound_hdr(xdr, &hdr);
6912 res->op_status = hdr.status;
6913 if (status)
6914 goto out;
6915 status = decode_sequence(xdr, &res->seq_res, rqstp);
6916 if (status)
6917 goto out;
6918 status = decode_putfh(xdr);
6919 if (status)
6920 goto out;
6921 status = decode_commit(xdr, res);
6922out:
6923 return status;
6924}
6925
6926/*
6927 * Decode FSINFO response
6928 */
6929static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6930 void *data)
6931{
6932 struct nfs4_fsinfo_res *res = data;
6933 struct compound_hdr hdr;
6934 int status;
6935
6936 status = decode_compound_hdr(xdr, &hdr);
6937 if (!status)
6938 status = decode_sequence(xdr, &res->seq_res, req);
6939 if (!status)
6940 status = decode_putfh(xdr);
6941 if (!status)
6942 status = decode_fsinfo(xdr, res->fsinfo);
6943 return status;
6944}
6945
6946/*
6947 * Decode PATHCONF response
6948 */
6949static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6950 void *data)
6951{
6952 struct nfs4_pathconf_res *res = data;
6953 struct compound_hdr hdr;
6954 int status;
6955
6956 status = decode_compound_hdr(xdr, &hdr);
6957 if (!status)
6958 status = decode_sequence(xdr, &res->seq_res, req);
6959 if (!status)
6960 status = decode_putfh(xdr);
6961 if (!status)
6962 status = decode_pathconf(xdr, res->pathconf);
6963 return status;
6964}
6965
6966/*
6967 * Decode STATFS response
6968 */
6969static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6970 void *data)
6971{
6972 struct nfs4_statfs_res *res = data;
6973 struct compound_hdr hdr;
6974 int status;
6975
6976 status = decode_compound_hdr(xdr, &hdr);
6977 if (!status)
6978 status = decode_sequence(xdr, &res->seq_res, req);
6979 if (!status)
6980 status = decode_putfh(xdr);
6981 if (!status)
6982 status = decode_statfs(xdr, res->fsstat);
6983 return status;
6984}
6985
6986/*
6987 * Decode GETATTR_BITMAP response
6988 */
6989static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6990 struct xdr_stream *xdr,
6991 void *data)
6992{
6993 struct nfs4_server_caps_res *res = data;
6994 struct compound_hdr hdr;
6995 int status;
6996
6997 status = decode_compound_hdr(xdr, &hdr);
6998 if (status)
6999 goto out;
7000 status = decode_sequence(xdr, &res->seq_res, req);
7001 if (status)
7002 goto out;
7003 status = decode_putfh(xdr);
7004 if (status)
7005 goto out;
7006 status = decode_server_caps(xdr, res);
7007out:
7008 return status;
7009}
7010
7011/*
7012 * Decode RENEW response
7013 */
7014static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7015 void *__unused)
7016{
7017 struct compound_hdr hdr;
7018 int status;
7019
7020 status = decode_compound_hdr(xdr, &hdr);
7021 if (!status)
7022 status = decode_renew(xdr);
7023 return status;
7024}
7025
7026/*
7027 * Decode SETCLIENTID response
7028 */
7029static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7030 struct xdr_stream *xdr,
7031 void *data)
7032{
7033 struct nfs4_setclientid_res *res = data;
7034 struct compound_hdr hdr;
7035 int status;
7036
7037 status = decode_compound_hdr(xdr, &hdr);
7038 if (!status)
7039 status = decode_setclientid(xdr, res);
7040 return status;
7041}
7042
7043/*
7044 * Decode SETCLIENTID_CONFIRM response
7045 */
7046static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7047 struct xdr_stream *xdr,
7048 void *data)
7049{
7050 struct compound_hdr hdr;
7051 int status;
7052
7053 status = decode_compound_hdr(xdr, &hdr);
7054 if (!status)
7055 status = decode_setclientid_confirm(xdr);
7056 return status;
7057}
7058
7059/*
7060 * Decode DELEGRETURN response
7061 */
7062static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7063 struct xdr_stream *xdr,
7064 void *data)
7065{
7066 struct nfs4_delegreturnres *res = data;
7067 struct compound_hdr hdr;
7068 int status;
7069
7070 status = decode_compound_hdr(xdr, &hdr);
7071 if (status)
7072 goto out;
7073 status = decode_sequence(xdr, &res->seq_res, rqstp);
7074 if (status)
7075 goto out;
7076 status = decode_putfh(xdr);
7077 if (status != 0)
7078 goto out;
7079 if (res->lr_res) {
7080 status = decode_layoutreturn(xdr, res->lr_res);
7081 res->lr_ret = status;
7082 if (status)
7083 goto out;
7084 }
7085 if (res->fattr) {
7086 status = decode_getfattr(xdr, res->fattr, res->server);
7087 if (status != 0)
7088 goto out;
7089 }
7090 status = decode_delegreturn(xdr);
7091out:
7092 return status;
7093}
7094
7095/*
7096 * Decode FS_LOCATIONS response
7097 */
7098static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7099 struct xdr_stream *xdr,
7100 void *data)
7101{
7102 struct nfs4_fs_locations_res *res = data;
7103 struct compound_hdr hdr;
7104 int status;
7105
7106 status = decode_compound_hdr(xdr, &hdr);
7107 if (status)
7108 goto out;
7109 status = decode_sequence(xdr, &res->seq_res, req);
7110 if (status)
7111 goto out;
7112 status = decode_putfh(xdr);
7113 if (status)
7114 goto out;
7115 if (res->migration) {
7116 xdr_enter_page(xdr, PAGE_SIZE);
7117 status = decode_getfattr_generic(xdr,
7118 &res->fs_locations->fattr,
7119 NULL, res->fs_locations,
7120 NULL, res->fs_locations->server);
7121 if (status)
7122 goto out;
7123 if (res->renew)
7124 status = decode_renew(xdr);
7125 } else {
7126 status = decode_lookup(xdr);
7127 if (status)
7128 goto out;
7129 xdr_enter_page(xdr, PAGE_SIZE);
7130 status = decode_getfattr_generic(xdr,
7131 &res->fs_locations->fattr,
7132 NULL, res->fs_locations,
7133 NULL, res->fs_locations->server);
7134 }
7135out:
7136 return status;
7137}
7138
7139/*
7140 * Decode SECINFO response
7141 */
7142static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7143 struct xdr_stream *xdr,
7144 void *data)
7145{
7146 struct nfs4_secinfo_res *res = data;
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_putfh(xdr);
7157 if (status)
7158 goto out;
7159 status = decode_secinfo(xdr, res);
7160out:
7161 return status;
7162}
7163
7164/*
7165 * Decode FSID_PRESENT response
7166 */
7167static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7168 struct xdr_stream *xdr,
7169 void *data)
7170{
7171 struct nfs4_fsid_present_res *res = data;
7172 struct compound_hdr hdr;
7173 int status;
7174
7175 status = decode_compound_hdr(xdr, &hdr);
7176 if (status)
7177 goto out;
7178 status = decode_sequence(xdr, &res->seq_res, rqstp);
7179 if (status)
7180 goto out;
7181 status = decode_putfh(xdr);
7182 if (status)
7183 goto out;
7184 status = decode_getfh(xdr, res->fh);
7185 if (status)
7186 goto out;
7187 if (res->renew)
7188 status = decode_renew(xdr);
7189out:
7190 return status;
7191}
7192
7193#if defined(CONFIG_NFS_V4_1)
7194/*
7195 * Decode BIND_CONN_TO_SESSION response
7196 */
7197static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7198 struct xdr_stream *xdr,
7199 void *res)
7200{
7201 struct compound_hdr hdr;
7202 int status;
7203
7204 status = decode_compound_hdr(xdr, &hdr);
7205 if (!status)
7206 status = decode_bind_conn_to_session(xdr, res);
7207 return status;
7208}
7209
7210/*
7211 * Decode EXCHANGE_ID response
7212 */
7213static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7214 struct xdr_stream *xdr,
7215 void *res)
7216{
7217 struct compound_hdr hdr;
7218 int status;
7219
7220 status = decode_compound_hdr(xdr, &hdr);
7221 if (!status)
7222 status = decode_exchange_id(xdr, res);
7223 return status;
7224}
7225
7226/*
7227 * Decode CREATE_SESSION response
7228 */
7229static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7230 struct xdr_stream *xdr,
7231 void *res)
7232{
7233 struct compound_hdr hdr;
7234 int status;
7235
7236 status = decode_compound_hdr(xdr, &hdr);
7237 if (!status)
7238 status = decode_create_session(xdr, res);
7239 return status;
7240}
7241
7242/*
7243 * Decode DESTROY_SESSION response
7244 */
7245static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7246 struct xdr_stream *xdr,
7247 void *res)
7248{
7249 struct compound_hdr hdr;
7250 int status;
7251
7252 status = decode_compound_hdr(xdr, &hdr);
7253 if (!status)
7254 status = decode_destroy_session(xdr, res);
7255 return status;
7256}
7257
7258/*
7259 * Decode DESTROY_CLIENTID response
7260 */
7261static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7262 struct xdr_stream *xdr,
7263 void *res)
7264{
7265 struct compound_hdr hdr;
7266 int status;
7267
7268 status = decode_compound_hdr(xdr, &hdr);
7269 if (!status)
7270 status = decode_destroy_clientid(xdr, res);
7271 return status;
7272}
7273
7274/*
7275 * Decode SEQUENCE response
7276 */
7277static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7278 struct xdr_stream *xdr,
7279 void *res)
7280{
7281 struct compound_hdr hdr;
7282 int status;
7283
7284 status = decode_compound_hdr(xdr, &hdr);
7285 if (!status)
7286 status = decode_sequence(xdr, res, rqstp);
7287 return status;
7288}
7289
7290/*
7291 * Decode GET_LEASE_TIME response
7292 */
7293static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7294 struct xdr_stream *xdr,
7295 void *data)
7296{
7297 struct nfs4_get_lease_time_res *res = data;
7298 struct compound_hdr hdr;
7299 int status;
7300
7301 status = decode_compound_hdr(xdr, &hdr);
7302 if (!status)
7303 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7304 if (!status)
7305 status = decode_putrootfh(xdr);
7306 if (!status)
7307 status = decode_fsinfo(xdr, res->lr_fsinfo);
7308 return status;
7309}
7310
7311/*
7312 * Decode RECLAIM_COMPLETE response
7313 */
7314static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7315 struct xdr_stream *xdr,
7316 void *data)
7317{
7318 struct nfs41_reclaim_complete_res *res = data;
7319 struct compound_hdr hdr;
7320 int status;
7321
7322 status = decode_compound_hdr(xdr, &hdr);
7323 if (!status)
7324 status = decode_sequence(xdr, &res->seq_res, rqstp);
7325 if (!status)
7326 status = decode_reclaim_complete(xdr, NULL);
7327 return status;
7328}
7329
7330/*
7331 * Decode GETDEVINFO response
7332 */
7333static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7334 struct xdr_stream *xdr,
7335 void *data)
7336{
7337 struct nfs4_getdeviceinfo_res *res = data;
7338 struct compound_hdr hdr;
7339 int status;
7340
7341 status = decode_compound_hdr(xdr, &hdr);
7342 if (status != 0)
7343 goto out;
7344 status = decode_sequence(xdr, &res->seq_res, rqstp);
7345 if (status != 0)
7346 goto out;
7347 status = decode_getdeviceinfo(xdr, res);
7348out:
7349 return status;
7350}
7351
7352/*
7353 * Decode LAYOUTGET response
7354 */
7355static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7356 struct xdr_stream *xdr,
7357 void *data)
7358{
7359 struct nfs4_layoutget_res *res = data;
7360 struct compound_hdr hdr;
7361 int status;
7362
7363 status = decode_compound_hdr(xdr, &hdr);
7364 if (status)
7365 goto out;
7366 status = decode_sequence(xdr, &res->seq_res, rqstp);
7367 if (status)
7368 goto out;
7369 status = decode_putfh(xdr);
7370 if (status)
7371 goto out;
7372 status = decode_layoutget(xdr, rqstp, res);
7373out:
7374 return status;
7375}
7376
7377/*
7378 * Decode LAYOUTRETURN response
7379 */
7380static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7381 struct xdr_stream *xdr,
7382 void *data)
7383{
7384 struct nfs4_layoutreturn_res *res = data;
7385 struct compound_hdr hdr;
7386 int status;
7387
7388 status = decode_compound_hdr(xdr, &hdr);
7389 if (status)
7390 goto out;
7391 status = decode_sequence(xdr, &res->seq_res, rqstp);
7392 if (status)
7393 goto out;
7394 status = decode_putfh(xdr);
7395 if (status)
7396 goto out;
7397 status = decode_layoutreturn(xdr, res);
7398out:
7399 return status;
7400}
7401
7402/*
7403 * Decode LAYOUTCOMMIT response
7404 */
7405static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7406 struct xdr_stream *xdr,
7407 void *data)
7408{
7409 struct nfs4_layoutcommit_res *res = data;
7410 struct compound_hdr hdr;
7411 int status;
7412
7413 status = decode_compound_hdr(xdr, &hdr);
7414 if (status)
7415 goto out;
7416 status = decode_sequence(xdr, &res->seq_res, rqstp);
7417 if (status)
7418 goto out;
7419 status = decode_putfh(xdr);
7420 if (status)
7421 goto out;
7422 status = decode_layoutcommit(xdr, rqstp, res);
7423 if (status)
7424 goto out;
7425 decode_getfattr(xdr, res->fattr, res->server);
7426out:
7427 return status;
7428}
7429
7430/*
7431 * Decode SECINFO_NO_NAME response
7432 */
7433static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7434 struct xdr_stream *xdr,
7435 void *data)
7436{
7437 struct nfs4_secinfo_res *res = data;
7438 struct compound_hdr hdr;
7439 int status;
7440
7441 status = decode_compound_hdr(xdr, &hdr);
7442 if (status)
7443 goto out;
7444 status = decode_sequence(xdr, &res->seq_res, rqstp);
7445 if (status)
7446 goto out;
7447 status = decode_putrootfh(xdr);
7448 if (status)
7449 goto out;
7450 status = decode_secinfo_no_name(xdr, res);
7451out:
7452 return status;
7453}
7454
7455/*
7456 * Decode TEST_STATEID response
7457 */
7458static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7459 struct xdr_stream *xdr,
7460 void *data)
7461{
7462 struct nfs41_test_stateid_res *res = data;
7463 struct compound_hdr hdr;
7464 int status;
7465
7466 status = decode_compound_hdr(xdr, &hdr);
7467 if (status)
7468 goto out;
7469 status = decode_sequence(xdr, &res->seq_res, rqstp);
7470 if (status)
7471 goto out;
7472 status = decode_test_stateid(xdr, res);
7473out:
7474 return status;
7475}
7476
7477/*
7478 * Decode FREE_STATEID response
7479 */
7480static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7481 struct xdr_stream *xdr,
7482 void *data)
7483{
7484 struct nfs41_free_stateid_res *res = data;
7485 struct compound_hdr hdr;
7486 int status;
7487
7488 status = decode_compound_hdr(xdr, &hdr);
7489 if (status)
7490 goto out;
7491 status = decode_sequence(xdr, &res->seq_res, rqstp);
7492 if (status)
7493 goto out;
7494 status = decode_free_stateid(xdr, res);
7495out:
7496 return status;
7497}
7498#endif /* CONFIG_NFS_V4_1 */
7499
7500/**
7501 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7502 * the local page cache.
7503 * @xdr: XDR stream where entry resides
7504 * @entry: buffer to fill in with entry data
7505 * @plus: boolean indicating whether this should be a readdirplus entry
7506 *
7507 * Returns zero if successful, otherwise a negative errno value is
7508 * returned.
7509 *
7510 * This function is not invoked during READDIR reply decoding, but
7511 * rather whenever an application invokes the getdents(2) system call
7512 * on a directory already in our cache.
7513 */
7514int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7515 bool plus)
7516{
7517 unsigned int savep;
7518 uint32_t bitmap[3] = {0};
7519 uint32_t len;
7520 uint64_t new_cookie;
7521 __be32 *p = xdr_inline_decode(xdr, 4);
7522 if (unlikely(!p))
7523 goto out_overflow;
7524 if (*p == xdr_zero) {
7525 p = xdr_inline_decode(xdr, 4);
7526 if (unlikely(!p))
7527 goto out_overflow;
7528 if (*p == xdr_zero)
7529 return -EAGAIN;
7530 entry->eof = 1;
7531 return -EBADCOOKIE;
7532 }
7533
7534 p = xdr_inline_decode(xdr, 12);
7535 if (unlikely(!p))
7536 goto out_overflow;
7537 p = xdr_decode_hyper(p, &new_cookie);
7538 entry->len = be32_to_cpup(p);
7539
7540 p = xdr_inline_decode(xdr, entry->len);
7541 if (unlikely(!p))
7542 goto out_overflow;
7543 entry->name = (const char *) p;
7544
7545 /*
7546 * In case the server doesn't return an inode number,
7547 * we fake one here. (We don't use inode number 0,
7548 * since glibc seems to choke on it...)
7549 */
7550 entry->ino = 1;
7551 entry->fattr->valid = 0;
7552
7553 if (decode_attr_bitmap(xdr, bitmap) < 0)
7554 goto out_overflow;
7555
7556 if (decode_attr_length(xdr, &len, &savep) < 0)
7557 goto out_overflow;
7558
7559 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7560 NULL, entry->label, entry->server) < 0)
7561 goto out_overflow;
7562 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7563 entry->ino = entry->fattr->mounted_on_fileid;
7564 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7565 entry->ino = entry->fattr->fileid;
7566
7567 entry->d_type = DT_UNKNOWN;
7568 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7569 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7570
7571 entry->prev_cookie = entry->cookie;
7572 entry->cookie = new_cookie;
7573
7574 return 0;
7575
7576out_overflow:
7577 print_overflow_msg(__func__, xdr);
7578 return -EAGAIN;
7579}
7580
7581/*
7582 * We need to translate between nfs status return values and
7583 * the local errno values which may not be the same.
7584 */
7585static struct {
7586 int stat;
7587 int errno;
7588} nfs_errtbl[] = {
7589 { NFS4_OK, 0 },
7590 { NFS4ERR_PERM, -EPERM },
7591 { NFS4ERR_NOENT, -ENOENT },
7592 { NFS4ERR_IO, -errno_NFSERR_IO},
7593 { NFS4ERR_NXIO, -ENXIO },
7594 { NFS4ERR_ACCESS, -EACCES },
7595 { NFS4ERR_EXIST, -EEXIST },
7596 { NFS4ERR_XDEV, -EXDEV },
7597 { NFS4ERR_NOTDIR, -ENOTDIR },
7598 { NFS4ERR_ISDIR, -EISDIR },
7599 { NFS4ERR_INVAL, -EINVAL },
7600 { NFS4ERR_FBIG, -EFBIG },
7601 { NFS4ERR_NOSPC, -ENOSPC },
7602 { NFS4ERR_ROFS, -EROFS },
7603 { NFS4ERR_MLINK, -EMLINK },
7604 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7605 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7606 { NFS4ERR_DQUOT, -EDQUOT },
7607 { NFS4ERR_STALE, -ESTALE },
7608 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7609 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7610 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7611 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7612 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7613 { NFS4ERR_BADTYPE, -EBADTYPE },
7614 { NFS4ERR_LOCKED, -EAGAIN },
7615 { NFS4ERR_SYMLINK, -ELOOP },
7616 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7617 { NFS4ERR_DEADLOCK, -EDEADLK },
7618 { -1, -EIO }
7619};
7620
7621/*
7622 * Convert an NFS error code to a local one.
7623 * This one is used jointly by NFSv2 and NFSv3.
7624 */
7625static int
7626nfs4_stat_to_errno(int stat)
7627{
7628 int i;
7629 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7630 if (nfs_errtbl[i].stat == stat)
7631 return nfs_errtbl[i].errno;
7632 }
7633 if (stat <= 10000 || stat > 10100) {
7634 /* The server is looney tunes. */
7635 return -EREMOTEIO;
7636 }
7637 /* If we cannot translate the error, the recovery routines should
7638 * handle it.
7639 * Note: remaining NFSv4 error codes have values > 10000, so should
7640 * not conflict with native Linux error codes.
7641 */
7642 return -stat;
7643}
7644
7645#ifdef CONFIG_NFS_V4_2
7646#include "nfs42xdr.c"
7647#endif /* CONFIG_NFS_V4_2 */
7648
7649#define PROC(proc, argtype, restype) \
7650[NFSPROC4_CLNT_##proc] = { \
7651 .p_proc = NFSPROC4_COMPOUND, \
7652 .p_encode = nfs4_xdr_##argtype, \
7653 .p_decode = nfs4_xdr_##restype, \
7654 .p_arglen = NFS4_##argtype##_sz, \
7655 .p_replen = NFS4_##restype##_sz, \
7656 .p_statidx = NFSPROC4_CLNT_##proc, \
7657 .p_name = #proc, \
7658}
7659
7660#define STUB(proc) \
7661[NFSPROC4_CLNT_##proc] = { \
7662 .p_name = #proc, \
7663}
7664
7665#if defined(CONFIG_NFS_V4_1)
7666#define PROC41(proc, argtype, restype) \
7667 PROC(proc, argtype, restype)
7668#else
7669#define PROC41(proc, argtype, restype) \
7670 STUB(proc)
7671#endif
7672
7673#if defined(CONFIG_NFS_V4_2)
7674#define PROC42(proc, argtype, restype) \
7675 PROC(proc, argtype, restype)
7676#else
7677#define PROC42(proc, argtype, restype) \
7678 STUB(proc)
7679#endif
7680
7681const struct rpc_procinfo nfs4_procedures[] = {
7682 PROC(READ, enc_read, dec_read),
7683 PROC(WRITE, enc_write, dec_write),
7684 PROC(COMMIT, enc_commit, dec_commit),
7685 PROC(OPEN, enc_open, dec_open),
7686 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7687 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7688 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7689 PROC(CLOSE, enc_close, dec_close),
7690 PROC(SETATTR, enc_setattr, dec_setattr),
7691 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7692 PROC(RENEW, enc_renew, dec_renew),
7693 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7694 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7695 PROC(LOCK, enc_lock, dec_lock),
7696 PROC(LOCKT, enc_lockt, dec_lockt),
7697 PROC(LOCKU, enc_locku, dec_locku),
7698 PROC(ACCESS, enc_access, dec_access),
7699 PROC(GETATTR, enc_getattr, dec_getattr),
7700 PROC(LOOKUP, enc_lookup, dec_lookup),
7701 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7702 PROC(REMOVE, enc_remove, dec_remove),
7703 PROC(RENAME, enc_rename, dec_rename),
7704 PROC(LINK, enc_link, dec_link),
7705 PROC(SYMLINK, enc_symlink, dec_symlink),
7706 PROC(CREATE, enc_create, dec_create),
7707 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7708 PROC(STATFS, enc_statfs, dec_statfs),
7709 PROC(READLINK, enc_readlink, dec_readlink),
7710 PROC(READDIR, enc_readdir, dec_readdir),
7711 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7712 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7713 PROC(GETACL, enc_getacl, dec_getacl),
7714 PROC(SETACL, enc_setacl, dec_setacl),
7715 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7716 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7717 PROC(SECINFO, enc_secinfo, dec_secinfo),
7718 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7719 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7720 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7721 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7722 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7723 PROC41(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7724 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7725 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7726 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7727 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7728 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7729 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7730 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7731 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7732 STUB(GETDEVICELIST),
7733 PROC41(BIND_CONN_TO_SESSION,
7734 enc_bind_conn_to_session, dec_bind_conn_to_session),
7735 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7736 PROC42(SEEK, enc_seek, dec_seek),
7737 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7738 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7739 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7740 PROC42(CLONE, enc_clone, dec_clone),
7741 PROC42(COPY, enc_copy, dec_copy),
7742 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7743};
7744
7745static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7746const struct rpc_version nfs_version4 = {
7747 .number = 4,
7748 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7749 .procs = nfs4_procedures,
7750 .counts = nfs_version4_counts,
7751};
7752
7753/*
7754 * Local variables:
7755 * c-basic-offset: 8
7756 * End:
7757 */
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 /* client name */ \
143 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
144 1 /* sc_prog */ + \
145 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
146 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
147 1) /* sc_cb_ident */
148#define decode_setclientid_maxsz \
149 (op_decode_hdr_maxsz + \
150 2 /* clientid */ + \
151 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
152 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
154#define encode_setclientid_confirm_maxsz \
155 (op_encode_hdr_maxsz + \
156 3 + (NFS4_VERIFIER_SIZE >> 2))
157#define decode_setclientid_confirm_maxsz \
158 (op_decode_hdr_maxsz)
159#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
160#define decode_lookup_maxsz (op_decode_hdr_maxsz)
161#define encode_share_access_maxsz \
162 (2)
163#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
164#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
165#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
166#define encode_open_maxsz (op_encode_hdr_maxsz + \
167 2 + encode_share_access_maxsz + 2 + \
168 open_owner_id_maxsz + \
169 encode_opentype_maxsz + \
170 encode_claim_null_maxsz)
171#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
172#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
173 decode_ace_maxsz)
174#define decode_change_info_maxsz (5)
175#define decode_open_maxsz (op_decode_hdr_maxsz + \
176 decode_stateid_maxsz + \
177 decode_change_info_maxsz + 1 + \
178 nfs4_fattr_bitmap_maxsz + \
179 decode_delegation_maxsz)
180#define encode_open_confirm_maxsz \
181 (op_encode_hdr_maxsz + \
182 encode_stateid_maxsz + 1)
183#define decode_open_confirm_maxsz \
184 (op_decode_hdr_maxsz + \
185 decode_stateid_maxsz)
186#define encode_open_downgrade_maxsz \
187 (op_encode_hdr_maxsz + \
188 encode_stateid_maxsz + 1 + \
189 encode_share_access_maxsz)
190#define decode_open_downgrade_maxsz \
191 (op_decode_hdr_maxsz + \
192 decode_stateid_maxsz)
193#define encode_close_maxsz (op_encode_hdr_maxsz + \
194 1 + encode_stateid_maxsz)
195#define decode_close_maxsz (op_decode_hdr_maxsz + \
196 decode_stateid_maxsz)
197#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
198 encode_stateid_maxsz + \
199 encode_attrs_maxsz)
200#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
201 nfs4_fattr_bitmap_maxsz)
202#define encode_read_maxsz (op_encode_hdr_maxsz + \
203 encode_stateid_maxsz + 3)
204#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
205#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
206 2 + encode_verifier_maxsz + 5 + \
207 nfs4_label_maxsz)
208#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
209 decode_verifier_maxsz)
210#define encode_readlink_maxsz (op_encode_hdr_maxsz)
211#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
212#define encode_write_maxsz (op_encode_hdr_maxsz + \
213 encode_stateid_maxsz + 4)
214#define decode_write_maxsz (op_decode_hdr_maxsz + \
215 2 + decode_verifier_maxsz)
216#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
217#define decode_commit_maxsz (op_decode_hdr_maxsz + \
218 decode_verifier_maxsz)
219#define encode_remove_maxsz (op_encode_hdr_maxsz + \
220 nfs4_name_maxsz)
221#define decode_remove_maxsz (op_decode_hdr_maxsz + \
222 decode_change_info_maxsz)
223#define encode_rename_maxsz (op_encode_hdr_maxsz + \
224 2 * nfs4_name_maxsz)
225#define decode_rename_maxsz (op_decode_hdr_maxsz + \
226 decode_change_info_maxsz + \
227 decode_change_info_maxsz)
228#define encode_link_maxsz (op_encode_hdr_maxsz + \
229 nfs4_name_maxsz)
230#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
231#define encode_lockowner_maxsz (7)
232#define encode_lock_maxsz (op_encode_hdr_maxsz + \
233 7 + \
234 1 + encode_stateid_maxsz + 1 + \
235 encode_lockowner_maxsz)
236#define decode_lock_denied_maxsz \
237 (8 + decode_lockowner_maxsz)
238#define decode_lock_maxsz (op_decode_hdr_maxsz + \
239 decode_lock_denied_maxsz)
240#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
241 encode_lockowner_maxsz)
242#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
243 decode_lock_denied_maxsz)
244#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
245 encode_stateid_maxsz + \
246 4)
247#define decode_locku_maxsz (op_decode_hdr_maxsz + \
248 decode_stateid_maxsz)
249#define encode_release_lockowner_maxsz \
250 (op_encode_hdr_maxsz + \
251 encode_lockowner_maxsz)
252#define decode_release_lockowner_maxsz \
253 (op_decode_hdr_maxsz)
254#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
255#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
256#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
257 1 + nfs4_name_maxsz + \
258 1 + \
259 nfs4_fattr_maxsz)
260#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
261#define encode_create_maxsz (op_encode_hdr_maxsz + \
262 1 + 2 + nfs4_name_maxsz + \
263 encode_attrs_maxsz)
264#define decode_create_maxsz (op_decode_hdr_maxsz + \
265 decode_change_info_maxsz + \
266 nfs4_fattr_bitmap_maxsz)
267#define encode_statfs_maxsz (encode_getattr_maxsz)
268#define decode_statfs_maxsz (decode_getattr_maxsz)
269#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
270#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
271#define encode_getacl_maxsz (encode_getattr_maxsz)
272#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
273 nfs4_fattr_bitmap_maxsz + 1)
274#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
275 encode_stateid_maxsz + 3)
276#define decode_setacl_maxsz (decode_setattr_maxsz)
277#define encode_fs_locations_maxsz \
278 (encode_getattr_maxsz)
279#define decode_fs_locations_maxsz \
280 (0)
281#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
282#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
283
284#if defined(CONFIG_NFS_V4_1)
285#define NFS4_MAX_MACHINE_NAME_LEN (64)
286#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
287 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
288
289#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
290 encode_verifier_maxsz + \
291 1 /* co_ownerid.len */ + \
292 /* eia_clientowner */ \
293 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
294 1 /* flags */ + \
295 1 /* spa_how */ + \
296 /* max is SP4_MACH_CRED (for now) */ + \
297 1 + NFS4_OP_MAP_NUM_WORDS + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 /* implementation id array of size 1 */ + \
300 1 /* nii_domain */ + \
301 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
302 1 /* nii_name */ + \
303 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
304 3 /* nii_date */)
305#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
306 2 /* eir_clientid */ + \
307 1 /* eir_sequenceid */ + \
308 1 /* eir_flags */ + \
309 1 /* spr_how */ + \
310 /* max is SP4_MACH_CRED (for now) */ + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 2 /* eir_server_owner.so_minor_id */ + \
314 /* eir_server_owner.so_major_id<> */ \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
316 /* eir_server_scope<> */ \
317 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
318 1 /* eir_server_impl_id array length */ + \
319 1 /* nii_domain */ + \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
321 1 /* nii_name */ + \
322 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
323 3 /* nii_date */)
324#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
325#define decode_channel_attrs_maxsz (6 + \
326 1 /* ca_rdma_ird.len */ + \
327 1 /* ca_rdma_ird */)
328#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
329 2 /* csa_clientid */ + \
330 1 /* csa_sequence */ + \
331 1 /* csa_flags */ + \
332 encode_channel_attrs_maxsz + \
333 encode_channel_attrs_maxsz + \
334 1 /* csa_cb_program */ + \
335 1 /* csa_sec_parms.len (1) */ + \
336 1 /* cb_secflavor (AUTH_SYS) */ + \
337 1 /* stamp */ + \
338 1 /* machinename.len */ + \
339 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
340 1 /* uid */ + \
341 1 /* gid */ + \
342 1 /* gids.len (0) */)
343#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
344 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
345 1 /* csr_sequence */ + \
346 1 /* csr_flags */ + \
347 decode_channel_attrs_maxsz + \
348 decode_channel_attrs_maxsz)
349#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
350 /* bctsa_sessid */ \
351 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
352 1 /* bctsa_dir */ + \
353 1 /* bctsa_use_conn_in_rdma_mode */)
354#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
355 /* bctsr_sessid */ \
356 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
357 1 /* bctsr_dir */ + \
358 1 /* bctsr_use_conn_in_rdma_mode */)
359#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
360#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
361#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
362#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
363#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
364 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
365#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
366 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
367#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
368#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
369#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
370 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
371 1 /* layout type */ + \
372 1 /* maxcount */ + \
373 1 /* bitmap size */ + \
374 1 /* notification bitmap length */ + \
375 1 /* notification bitmap, word 0 */)
376#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
377 1 /* layout type */ + \
378 1 /* opaque devaddr4 length */ + \
379 /* devaddr4 payload is read into page */ \
380 1 /* notification bitmap length */ + \
381 1 /* notification bitmap, word 0 */)
382#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
383 encode_stateid_maxsz)
384#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
385 decode_stateid_maxsz + \
386 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
387#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
388 2 /* offset */ + \
389 2 /* length */ + \
390 1 /* reclaim */ + \
391 encode_stateid_maxsz + \
392 1 /* new offset (true) */ + \
393 2 /* last byte written */ + \
394 1 /* nt_timechanged (false) */ + \
395 1 /* layoutupdate4 layout type */ + \
396 1 /* layoutupdate4 opaqueue len */)
397 /* the actual content of layoutupdate4 should
398 be allocated by drivers and spliced in
399 using xdr_write_pages */
400#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
401#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
402 encode_stateid_maxsz + \
403 1 + \
404 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
405#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
406 1 + decode_stateid_maxsz)
407#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
408#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
409#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
410 XDR_QUADLEN(NFS4_STATEID_SIZE))
411#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
412#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
413 XDR_QUADLEN(NFS4_STATEID_SIZE))
414#define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
415#else /* CONFIG_NFS_V4_1 */
416#define encode_sequence_maxsz 0
417#define decode_sequence_maxsz 0
418#endif /* CONFIG_NFS_V4_1 */
419
420#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
421#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
422#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
423 encode_sequence_maxsz + \
424 encode_putfh_maxsz + \
425 encode_read_maxsz)
426#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
427 decode_sequence_maxsz + \
428 decode_putfh_maxsz + \
429 decode_read_maxsz)
430#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
431 encode_sequence_maxsz + \
432 encode_putfh_maxsz + \
433 encode_readlink_maxsz)
434#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
435 decode_sequence_maxsz + \
436 decode_putfh_maxsz + \
437 decode_readlink_maxsz)
438#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
439 encode_sequence_maxsz + \
440 encode_putfh_maxsz + \
441 encode_readdir_maxsz)
442#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
443 decode_sequence_maxsz + \
444 decode_putfh_maxsz + \
445 decode_readdir_maxsz)
446#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_write_maxsz + \
450 encode_getattr_maxsz)
451#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_write_maxsz + \
455 decode_getattr_maxsz)
456#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
457 encode_sequence_maxsz + \
458 encode_putfh_maxsz + \
459 encode_commit_maxsz)
460#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
461 decode_sequence_maxsz + \
462 decode_putfh_maxsz + \
463 decode_commit_maxsz)
464#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
465 encode_sequence_maxsz + \
466 encode_putfh_maxsz + \
467 encode_open_maxsz + \
468 encode_access_maxsz + \
469 encode_getfh_maxsz + \
470 encode_getattr_maxsz)
471#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
472 decode_sequence_maxsz + \
473 decode_putfh_maxsz + \
474 decode_open_maxsz + \
475 decode_access_maxsz + \
476 decode_getfh_maxsz + \
477 decode_getattr_maxsz)
478#define NFS4_enc_open_confirm_sz \
479 (compound_encode_hdr_maxsz + \
480 encode_putfh_maxsz + \
481 encode_open_confirm_maxsz)
482#define NFS4_dec_open_confirm_sz \
483 (compound_decode_hdr_maxsz + \
484 decode_putfh_maxsz + \
485 decode_open_confirm_maxsz)
486#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
487 encode_sequence_maxsz + \
488 encode_putfh_maxsz + \
489 encode_open_maxsz + \
490 encode_access_maxsz + \
491 encode_getattr_maxsz)
492#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
493 decode_sequence_maxsz + \
494 decode_putfh_maxsz + \
495 decode_open_maxsz + \
496 decode_access_maxsz + \
497 decode_getattr_maxsz)
498#define NFS4_enc_open_downgrade_sz \
499 (compound_encode_hdr_maxsz + \
500 encode_sequence_maxsz + \
501 encode_putfh_maxsz + \
502 encode_open_downgrade_maxsz + \
503 encode_getattr_maxsz)
504#define NFS4_dec_open_downgrade_sz \
505 (compound_decode_hdr_maxsz + \
506 decode_sequence_maxsz + \
507 decode_putfh_maxsz + \
508 decode_open_downgrade_maxsz + \
509 decode_getattr_maxsz)
510#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
511 encode_sequence_maxsz + \
512 encode_putfh_maxsz + \
513 encode_close_maxsz + \
514 encode_getattr_maxsz)
515#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
516 decode_sequence_maxsz + \
517 decode_putfh_maxsz + \
518 decode_close_maxsz + \
519 decode_getattr_maxsz)
520#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
521 encode_sequence_maxsz + \
522 encode_putfh_maxsz + \
523 encode_setattr_maxsz + \
524 encode_getattr_maxsz)
525#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
526 decode_sequence_maxsz + \
527 decode_putfh_maxsz + \
528 decode_setattr_maxsz + \
529 decode_getattr_maxsz)
530#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
531 encode_sequence_maxsz + \
532 encode_putfh_maxsz + \
533 encode_fsinfo_maxsz)
534#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_fsinfo_maxsz)
538#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
539 encode_renew_maxsz)
540#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
541 decode_renew_maxsz)
542#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
543 encode_setclientid_maxsz)
544#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
545 decode_setclientid_maxsz)
546#define NFS4_enc_setclientid_confirm_sz \
547 (compound_encode_hdr_maxsz + \
548 encode_setclientid_confirm_maxsz)
549#define NFS4_dec_setclientid_confirm_sz \
550 (compound_decode_hdr_maxsz + \
551 decode_setclientid_confirm_maxsz)
552#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
553 encode_sequence_maxsz + \
554 encode_putfh_maxsz + \
555 encode_lock_maxsz)
556#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
557 decode_sequence_maxsz + \
558 decode_putfh_maxsz + \
559 decode_lock_maxsz)
560#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
561 encode_sequence_maxsz + \
562 encode_putfh_maxsz + \
563 encode_lockt_maxsz)
564#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
565 decode_sequence_maxsz + \
566 decode_putfh_maxsz + \
567 decode_lockt_maxsz)
568#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
569 encode_sequence_maxsz + \
570 encode_putfh_maxsz + \
571 encode_locku_maxsz)
572#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
573 decode_sequence_maxsz + \
574 decode_putfh_maxsz + \
575 decode_locku_maxsz)
576#define NFS4_enc_release_lockowner_sz \
577 (compound_encode_hdr_maxsz + \
578 encode_lockowner_maxsz)
579#define NFS4_dec_release_lockowner_sz \
580 (compound_decode_hdr_maxsz + \
581 decode_lockowner_maxsz)
582#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
583 encode_sequence_maxsz + \
584 encode_putfh_maxsz + \
585 encode_access_maxsz + \
586 encode_getattr_maxsz)
587#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
588 decode_sequence_maxsz + \
589 decode_putfh_maxsz + \
590 decode_access_maxsz + \
591 decode_getattr_maxsz)
592#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
593 encode_sequence_maxsz + \
594 encode_putfh_maxsz + \
595 encode_getattr_maxsz + \
596 encode_renew_maxsz)
597#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_getattr_maxsz + \
601 decode_renew_maxsz)
602#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
603 encode_sequence_maxsz + \
604 encode_putfh_maxsz + \
605 encode_lookup_maxsz + \
606 encode_getattr_maxsz + \
607 encode_getfh_maxsz)
608#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
609 decode_sequence_maxsz + \
610 decode_putfh_maxsz + \
611 decode_lookup_maxsz + \
612 decode_getattr_maxsz + \
613 decode_getfh_maxsz)
614#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
615 encode_sequence_maxsz + \
616 encode_putrootfh_maxsz + \
617 encode_getattr_maxsz + \
618 encode_getfh_maxsz)
619#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
620 decode_sequence_maxsz + \
621 decode_putrootfh_maxsz + \
622 decode_getattr_maxsz + \
623 decode_getfh_maxsz)
624#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
625 encode_sequence_maxsz + \
626 encode_putfh_maxsz + \
627 encode_remove_maxsz)
628#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
629 decode_sequence_maxsz + \
630 decode_putfh_maxsz + \
631 decode_remove_maxsz)
632#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
633 encode_sequence_maxsz + \
634 encode_putfh_maxsz + \
635 encode_savefh_maxsz + \
636 encode_putfh_maxsz + \
637 encode_rename_maxsz)
638#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
639 decode_sequence_maxsz + \
640 decode_putfh_maxsz + \
641 decode_savefh_maxsz + \
642 decode_putfh_maxsz + \
643 decode_rename_maxsz)
644#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
645 encode_sequence_maxsz + \
646 encode_putfh_maxsz + \
647 encode_savefh_maxsz + \
648 encode_putfh_maxsz + \
649 encode_link_maxsz + \
650 encode_restorefh_maxsz + \
651 encode_getattr_maxsz)
652#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
653 decode_sequence_maxsz + \
654 decode_putfh_maxsz + \
655 decode_savefh_maxsz + \
656 decode_putfh_maxsz + \
657 decode_link_maxsz + \
658 decode_restorefh_maxsz + \
659 decode_getattr_maxsz)
660#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
661 encode_sequence_maxsz + \
662 encode_putfh_maxsz + \
663 encode_symlink_maxsz + \
664 encode_getattr_maxsz + \
665 encode_getfh_maxsz)
666#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
667 decode_sequence_maxsz + \
668 decode_putfh_maxsz + \
669 decode_symlink_maxsz + \
670 decode_getattr_maxsz + \
671 decode_getfh_maxsz)
672#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
673 encode_sequence_maxsz + \
674 encode_putfh_maxsz + \
675 encode_create_maxsz + \
676 encode_getfh_maxsz + \
677 encode_getattr_maxsz)
678#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
679 decode_sequence_maxsz + \
680 decode_putfh_maxsz + \
681 decode_create_maxsz + \
682 decode_getfh_maxsz + \
683 decode_getattr_maxsz)
684#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
685 encode_sequence_maxsz + \
686 encode_putfh_maxsz + \
687 encode_getattr_maxsz)
688#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
689 decode_sequence_maxsz + \
690 decode_putfh_maxsz + \
691 decode_getattr_maxsz)
692#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
693 encode_sequence_maxsz + \
694 encode_putfh_maxsz + \
695 encode_statfs_maxsz)
696#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
697 decode_sequence_maxsz + \
698 decode_putfh_maxsz + \
699 decode_statfs_maxsz)
700#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
701 encode_sequence_maxsz + \
702 encode_putfh_maxsz + \
703 encode_getattr_maxsz)
704#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
705 decode_sequence_maxsz + \
706 decode_putfh_maxsz + \
707 decode_getattr_maxsz)
708#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
709 encode_sequence_maxsz + \
710 encode_putfh_maxsz + \
711 encode_delegreturn_maxsz + \
712 encode_getattr_maxsz)
713#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
714 decode_sequence_maxsz + \
715 decode_delegreturn_maxsz + \
716 decode_getattr_maxsz)
717#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
718 encode_sequence_maxsz + \
719 encode_putfh_maxsz + \
720 encode_getacl_maxsz)
721#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
722 decode_sequence_maxsz + \
723 decode_putfh_maxsz + \
724 decode_getacl_maxsz)
725#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_setacl_maxsz)
729#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_setacl_maxsz)
733#define NFS4_enc_fs_locations_sz \
734 (compound_encode_hdr_maxsz + \
735 encode_sequence_maxsz + \
736 encode_putfh_maxsz + \
737 encode_lookup_maxsz + \
738 encode_fs_locations_maxsz + \
739 encode_renew_maxsz)
740#define NFS4_dec_fs_locations_sz \
741 (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_lookup_maxsz + \
745 decode_fs_locations_maxsz + \
746 decode_renew_maxsz)
747#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
748 encode_sequence_maxsz + \
749 encode_putfh_maxsz + \
750 encode_secinfo_maxsz)
751#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_secinfo_maxsz)
755#define NFS4_enc_fsid_present_sz \
756 (compound_encode_hdr_maxsz + \
757 encode_sequence_maxsz + \
758 encode_putfh_maxsz + \
759 encode_getfh_maxsz + \
760 encode_renew_maxsz)
761#define NFS4_dec_fsid_present_sz \
762 (compound_decode_hdr_maxsz + \
763 decode_sequence_maxsz + \
764 decode_putfh_maxsz + \
765 decode_getfh_maxsz + \
766 decode_renew_maxsz)
767#if defined(CONFIG_NFS_V4_1)
768#define NFS4_enc_bind_conn_to_session_sz \
769 (compound_encode_hdr_maxsz + \
770 encode_bind_conn_to_session_maxsz)
771#define NFS4_dec_bind_conn_to_session_sz \
772 (compound_decode_hdr_maxsz + \
773 decode_bind_conn_to_session_maxsz)
774#define NFS4_enc_exchange_id_sz \
775 (compound_encode_hdr_maxsz + \
776 encode_exchange_id_maxsz)
777#define NFS4_dec_exchange_id_sz \
778 (compound_decode_hdr_maxsz + \
779 decode_exchange_id_maxsz)
780#define NFS4_enc_create_session_sz \
781 (compound_encode_hdr_maxsz + \
782 encode_create_session_maxsz)
783#define NFS4_dec_create_session_sz \
784 (compound_decode_hdr_maxsz + \
785 decode_create_session_maxsz)
786#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
787 encode_destroy_session_maxsz)
788#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
789 decode_destroy_session_maxsz)
790#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
791 encode_destroy_clientid_maxsz)
792#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
793 decode_destroy_clientid_maxsz)
794#define NFS4_enc_sequence_sz \
795 (compound_decode_hdr_maxsz + \
796 encode_sequence_maxsz)
797#define NFS4_dec_sequence_sz \
798 (compound_decode_hdr_maxsz + \
799 decode_sequence_maxsz)
800#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
801 encode_sequence_maxsz + \
802 encode_putrootfh_maxsz + \
803 encode_fsinfo_maxsz)
804#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
805 decode_sequence_maxsz + \
806 decode_putrootfh_maxsz + \
807 decode_fsinfo_maxsz)
808#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
809 encode_sequence_maxsz + \
810 encode_reclaim_complete_maxsz)
811#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
812 decode_sequence_maxsz + \
813 decode_reclaim_complete_maxsz)
814#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
815 encode_sequence_maxsz +\
816 encode_getdeviceinfo_maxsz)
817#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
818 decode_sequence_maxsz + \
819 decode_getdeviceinfo_maxsz)
820#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
821 encode_sequence_maxsz + \
822 encode_putfh_maxsz + \
823 encode_layoutget_maxsz)
824#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_putfh_maxsz + \
827 decode_layoutget_maxsz)
828#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz +\
830 encode_putfh_maxsz + \
831 encode_layoutcommit_maxsz + \
832 encode_getattr_maxsz)
833#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
834 decode_sequence_maxsz + \
835 decode_putfh_maxsz + \
836 decode_layoutcommit_maxsz + \
837 decode_getattr_maxsz)
838#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz + \
840 encode_putfh_maxsz + \
841 encode_layoutreturn_maxsz)
842#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
843 decode_sequence_maxsz + \
844 decode_putfh_maxsz + \
845 decode_layoutreturn_maxsz)
846#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putrootfh_maxsz +\
849 encode_secinfo_no_name_maxsz)
850#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putrootfh_maxsz + \
853 decode_secinfo_no_name_maxsz)
854#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz + \
856 encode_test_stateid_maxsz)
857#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_test_stateid_maxsz)
860#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
861 encode_sequence_maxsz + \
862 encode_free_stateid_maxsz)
863#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
864 decode_sequence_maxsz + \
865 decode_free_stateid_maxsz)
866
867const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
868 compound_encode_hdr_maxsz +
869 encode_sequence_maxsz +
870 encode_putfh_maxsz +
871 encode_getattr_maxsz) *
872 XDR_UNIT);
873
874const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
875 compound_decode_hdr_maxsz +
876 decode_sequence_maxsz +
877 decode_putfh_maxsz) *
878 XDR_UNIT);
879
880const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
881 compound_decode_hdr_maxsz +
882 decode_sequence_maxsz) *
883 XDR_UNIT);
884EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
885#endif /* CONFIG_NFS_V4_1 */
886
887static const umode_t nfs_type2fmt[] = {
888 [NF4BAD] = 0,
889 [NF4REG] = S_IFREG,
890 [NF4DIR] = S_IFDIR,
891 [NF4BLK] = S_IFBLK,
892 [NF4CHR] = S_IFCHR,
893 [NF4LNK] = S_IFLNK,
894 [NF4SOCK] = S_IFSOCK,
895 [NF4FIFO] = S_IFIFO,
896 [NF4ATTRDIR] = 0,
897 [NF4NAMEDATTR] = 0,
898};
899
900struct compound_hdr {
901 int32_t status;
902 uint32_t nops;
903 __be32 * nops_p;
904 uint32_t taglen;
905 char * tag;
906 uint32_t replen; /* expected reply words */
907 u32 minorversion;
908};
909
910static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
911{
912 __be32 *p = xdr_reserve_space(xdr, nbytes);
913 BUG_ON(!p);
914 return p;
915}
916
917static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
918{
919 __be32 *p;
920
921 p = xdr_reserve_space(xdr, len);
922 xdr_encode_opaque_fixed(p, buf, len);
923}
924
925static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
926{
927 __be32 *p;
928
929 p = reserve_space(xdr, 4 + len);
930 xdr_encode_opaque(p, str, len);
931}
932
933static void encode_uint32(struct xdr_stream *xdr, u32 n)
934{
935 __be32 *p;
936
937 p = reserve_space(xdr, 4);
938 *p = cpu_to_be32(n);
939}
940
941static void encode_uint64(struct xdr_stream *xdr, u64 n)
942{
943 __be32 *p;
944
945 p = reserve_space(xdr, 8);
946 xdr_encode_hyper(p, n);
947}
948
949static void encode_nfs4_seqid(struct xdr_stream *xdr,
950 const struct nfs_seqid *seqid)
951{
952 if (seqid != NULL)
953 encode_uint32(xdr, seqid->sequence->counter);
954 else
955 encode_uint32(xdr, 0);
956}
957
958static void encode_compound_hdr(struct xdr_stream *xdr,
959 struct rpc_rqst *req,
960 struct compound_hdr *hdr)
961{
962 __be32 *p;
963 struct rpc_auth *auth = req->rq_cred->cr_auth;
964
965 /* initialize running count of expected bytes in reply.
966 * NOTE: the replied tag SHOULD be the same is the one sent,
967 * but this is not required as a MUST for the server to do so. */
968 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
969
970 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
971 encode_string(xdr, hdr->taglen, hdr->tag);
972 p = reserve_space(xdr, 8);
973 *p++ = cpu_to_be32(hdr->minorversion);
974 hdr->nops_p = p;
975 *p = cpu_to_be32(hdr->nops);
976}
977
978static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
979 uint32_t replen,
980 struct compound_hdr *hdr)
981{
982 encode_uint32(xdr, op);
983 hdr->nops++;
984 hdr->replen += replen;
985}
986
987static void encode_nops(struct compound_hdr *hdr)
988{
989 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
990 *hdr->nops_p = htonl(hdr->nops);
991}
992
993static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
994{
995 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
996}
997
998static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
999{
1000 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1001}
1002
1003static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1004 const struct nfs4_label *label,
1005 const struct nfs_server *server,
1006 bool excl_check)
1007{
1008 char owner_name[IDMAP_NAMESZ];
1009 char owner_group[IDMAP_NAMESZ];
1010 int owner_namelen = 0;
1011 int owner_grouplen = 0;
1012 __be32 *p;
1013 unsigned i;
1014 uint32_t len = 0;
1015 uint32_t bmval_len;
1016 uint32_t bmval[3] = { 0 };
1017
1018 /*
1019 * We reserve enough space to write the entire attribute buffer at once.
1020 * In the worst-case, this would be
1021 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1022 * = 40 bytes, plus any contribution from variable-length fields
1023 * such as owner/group.
1024 */
1025 if (iap->ia_valid & ATTR_SIZE) {
1026 bmval[0] |= FATTR4_WORD0_SIZE;
1027 len += 8;
1028 }
1029 if (iap->ia_valid & ATTR_MODE) {
1030 bmval[1] |= FATTR4_WORD1_MODE;
1031 len += 4;
1032 }
1033 if (iap->ia_valid & ATTR_UID) {
1034 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035 if (owner_namelen < 0) {
1036 dprintk("nfs: couldn't resolve uid %d to string\n",
1037 from_kuid(&init_user_ns, iap->ia_uid));
1038 /* XXX */
1039 strcpy(owner_name, "nobody");
1040 owner_namelen = sizeof("nobody") - 1;
1041 /* goto out; */
1042 }
1043 bmval[1] |= FATTR4_WORD1_OWNER;
1044 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045 }
1046 if (iap->ia_valid & ATTR_GID) {
1047 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1048 if (owner_grouplen < 0) {
1049 dprintk("nfs: couldn't resolve gid %d to string\n",
1050 from_kgid(&init_user_ns, iap->ia_gid));
1051 strcpy(owner_group, "nobody");
1052 owner_grouplen = sizeof("nobody") - 1;
1053 /* goto out; */
1054 }
1055 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1056 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1057 }
1058 if (iap->ia_valid & ATTR_ATIME_SET) {
1059 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1060 len += 16;
1061 } else if (iap->ia_valid & ATTR_ATIME) {
1062 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063 len += 4;
1064 }
1065 if (iap->ia_valid & ATTR_MTIME_SET) {
1066 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1067 len += 16;
1068 } else if (iap->ia_valid & ATTR_MTIME) {
1069 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070 len += 4;
1071 }
1072
1073 if (excl_check) {
1074 const u32 *excl_bmval = server->exclcreat_bitmask;
1075 bmval[0] &= excl_bmval[0];
1076 bmval[1] &= excl_bmval[1];
1077 bmval[2] &= excl_bmval[2];
1078
1079 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1080 label = NULL;
1081 }
1082
1083 if (label) {
1084 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1085 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1086 }
1087
1088 if (bmval[2] != 0)
1089 bmval_len = 3;
1090 else if (bmval[1] != 0)
1091 bmval_len = 2;
1092 else
1093 bmval_len = 1;
1094
1095 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1096
1097 *p++ = cpu_to_be32(bmval_len);
1098 for (i = 0; i < bmval_len; i++)
1099 *p++ = cpu_to_be32(bmval[i]);
1100 *p++ = cpu_to_be32(len);
1101
1102 if (bmval[0] & FATTR4_WORD0_SIZE)
1103 p = xdr_encode_hyper(p, iap->ia_size);
1104 if (bmval[1] & FATTR4_WORD1_MODE)
1105 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1106 if (bmval[1] & FATTR4_WORD1_OWNER)
1107 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1108 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1109 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1110 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111 if (iap->ia_valid & ATTR_ATIME_SET) {
1112 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1114 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1115 } else
1116 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117 }
1118 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1119 if (iap->ia_valid & ATTR_MTIME_SET) {
1120 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1121 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1122 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1123 } else
1124 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1125 }
1126 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1127 *p++ = cpu_to_be32(label->lfs);
1128 *p++ = cpu_to_be32(label->pi);
1129 *p++ = cpu_to_be32(label->len);
1130 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1131 }
1132
1133/* out: */
1134}
1135
1136static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1137{
1138 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1139 encode_uint32(xdr, access);
1140}
1141
1142static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1143{
1144 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1145 encode_nfs4_seqid(xdr, arg->seqid);
1146 encode_nfs4_stateid(xdr, &arg->stateid);
1147}
1148
1149static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1150{
1151 __be32 *p;
1152
1153 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1154 p = reserve_space(xdr, 12);
1155 p = xdr_encode_hyper(p, args->offset);
1156 *p = cpu_to_be32(args->count);
1157}
1158
1159static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1160{
1161 __be32 *p;
1162
1163 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1164 encode_uint32(xdr, create->ftype);
1165
1166 switch (create->ftype) {
1167 case NF4LNK:
1168 p = reserve_space(xdr, 4);
1169 *p = cpu_to_be32(create->u.symlink.len);
1170 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1171 create->u.symlink.len);
1172 xdr->buf->flags |= XDRBUF_WRITE;
1173 break;
1174
1175 case NF4BLK: case NF4CHR:
1176 p = reserve_space(xdr, 8);
1177 *p++ = cpu_to_be32(create->u.device.specdata1);
1178 *p = cpu_to_be32(create->u.device.specdata2);
1179 break;
1180
1181 default:
1182 break;
1183 }
1184
1185 encode_string(xdr, create->name->len, create->name->name);
1186 encode_attrs(xdr, create->attrs, create->label, create->server, false);
1187}
1188
1189static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190{
1191 __be32 *p;
1192
1193 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194 p = reserve_space(xdr, 8);
1195 *p++ = cpu_to_be32(1);
1196 *p = cpu_to_be32(bitmap);
1197}
1198
1199static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200{
1201 __be32 *p;
1202
1203 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204 p = reserve_space(xdr, 12);
1205 *p++ = cpu_to_be32(2);
1206 *p++ = cpu_to_be32(bm0);
1207 *p = cpu_to_be32(bm1);
1208}
1209
1210static void
1211encode_getattr_three(struct xdr_stream *xdr,
1212 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213 struct compound_hdr *hdr)
1214{
1215 __be32 *p;
1216
1217 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218 if (bm2) {
1219 p = reserve_space(xdr, 16);
1220 *p++ = cpu_to_be32(3);
1221 *p++ = cpu_to_be32(bm0);
1222 *p++ = cpu_to_be32(bm1);
1223 *p = cpu_to_be32(bm2);
1224 } else if (bm1) {
1225 p = reserve_space(xdr, 12);
1226 *p++ = cpu_to_be32(2);
1227 *p++ = cpu_to_be32(bm0);
1228 *p = cpu_to_be32(bm1);
1229 } else {
1230 p = reserve_space(xdr, 8);
1231 *p++ = cpu_to_be32(1);
1232 *p = cpu_to_be32(bm0);
1233 }
1234}
1235
1236static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237{
1238 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239 bitmask[1] & nfs4_fattr_bitmap[1],
1240 bitmask[2] & nfs4_fattr_bitmap[2],
1241 hdr);
1242}
1243
1244static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245 const u32 *open_bitmap,
1246 struct compound_hdr *hdr)
1247{
1248 encode_getattr_three(xdr,
1249 bitmask[0] & open_bitmap[0],
1250 bitmask[1] & open_bitmap[1],
1251 bitmask[2] & open_bitmap[2],
1252 hdr);
1253}
1254
1255static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256{
1257 encode_getattr_three(xdr,
1258 bitmask[0] & nfs4_fsinfo_bitmap[0],
1259 bitmask[1] & nfs4_fsinfo_bitmap[1],
1260 bitmask[2] & nfs4_fsinfo_bitmap[2],
1261 hdr);
1262}
1263
1264static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265{
1266 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268}
1269
1270static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271{
1272 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273}
1274
1275static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276{
1277 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278 encode_string(xdr, name->len, name->name);
1279}
1280
1281static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282{
1283 if (fl->fl_type == F_RDLCK)
1284 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286}
1287
1288static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289{
1290 if (fl->fl_end == OFFSET_MAX)
1291 return ~(uint64_t)0;
1292 return fl->fl_end - fl->fl_start + 1;
1293}
1294
1295static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296{
1297 __be32 *p;
1298
1299 p = reserve_space(xdr, 32);
1300 p = xdr_encode_hyper(p, lowner->clientid);
1301 *p++ = cpu_to_be32(20);
1302 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303 *p++ = cpu_to_be32(lowner->s_dev);
1304 xdr_encode_hyper(p, lowner->id);
1305}
1306
1307/*
1308 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310 */
1311static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312{
1313 __be32 *p;
1314
1315 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316 p = reserve_space(xdr, 28);
1317 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318 *p++ = cpu_to_be32(args->reclaim);
1319 p = xdr_encode_hyper(p, args->fl->fl_start);
1320 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321 *p = cpu_to_be32(args->new_lock_owner);
1322 if (args->new_lock_owner){
1323 encode_nfs4_seqid(xdr, args->open_seqid);
1324 encode_nfs4_stateid(xdr, &args->open_stateid);
1325 encode_nfs4_seqid(xdr, args->lock_seqid);
1326 encode_lockowner(xdr, &args->lock_owner);
1327 }
1328 else {
1329 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330 encode_nfs4_seqid(xdr, args->lock_seqid);
1331 }
1332}
1333
1334static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335{
1336 __be32 *p;
1337
1338 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339 p = reserve_space(xdr, 20);
1340 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341 p = xdr_encode_hyper(p, args->fl->fl_start);
1342 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343 encode_lockowner(xdr, &args->lock_owner);
1344}
1345
1346static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347{
1348 __be32 *p;
1349
1350 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352 encode_nfs4_seqid(xdr, args->seqid);
1353 encode_nfs4_stateid(xdr, &args->stateid);
1354 p = reserve_space(xdr, 16);
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357}
1358
1359static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360{
1361 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362 encode_lockowner(xdr, lowner);
1363}
1364
1365static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366{
1367 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368 encode_string(xdr, name->len, name->name);
1369}
1370
1371static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372{
1373 __be32 *p;
1374
1375 p = reserve_space(xdr, 8);
1376 *p++ = cpu_to_be32(share_access);
1377 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1378}
1379
1380static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381{
1382 __be32 *p;
1383 /*
1384 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385 * owner 4 = 32
1386 */
1387 encode_nfs4_seqid(xdr, arg->seqid);
1388 encode_share_access(xdr, arg->share_access);
1389 p = reserve_space(xdr, 36);
1390 p = xdr_encode_hyper(p, arg->clientid);
1391 *p++ = cpu_to_be32(24);
1392 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393 *p++ = cpu_to_be32(arg->server->s_dev);
1394 *p++ = cpu_to_be32(arg->id.uniquifier);
1395 xdr_encode_hyper(p, arg->id.create_time);
1396}
1397
1398static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399{
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 switch(arg->createmode) {
1404 case NFS4_CREATE_UNCHECKED:
1405 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1407 break;
1408 case NFS4_CREATE_GUARDED:
1409 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1410 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1411 break;
1412 case NFS4_CREATE_EXCLUSIVE:
1413 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1414 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415 break;
1416 case NFS4_CREATE_EXCLUSIVE4_1:
1417 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1418 encode_nfs4_verifier(xdr, &arg->u.verifier);
1419 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true);
1420 }
1421}
1422
1423static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424{
1425 __be32 *p;
1426
1427 p = reserve_space(xdr, 4);
1428 switch (arg->open_flags & O_CREAT) {
1429 case 0:
1430 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431 break;
1432 default:
1433 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434 encode_createmode(xdr, arg);
1435 }
1436}
1437
1438static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439{
1440 __be32 *p;
1441
1442 p = reserve_space(xdr, 4);
1443 switch (delegation_type) {
1444 case 0:
1445 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446 break;
1447 case FMODE_READ:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449 break;
1450 case FMODE_WRITE|FMODE_READ:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452 break;
1453 default:
1454 BUG();
1455 }
1456}
1457
1458static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459{
1460 __be32 *p;
1461
1462 p = reserve_space(xdr, 4);
1463 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464 encode_string(xdr, name->len, name->name);
1465}
1466
1467static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468{
1469 __be32 *p;
1470
1471 p = reserve_space(xdr, 4);
1472 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473 encode_delegation_type(xdr, type);
1474}
1475
1476static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477{
1478 __be32 *p;
1479
1480 p = reserve_space(xdr, 4);
1481 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482 encode_nfs4_stateid(xdr, stateid);
1483 encode_string(xdr, name->len, name->name);
1484}
1485
1486static inline void encode_claim_fh(struct xdr_stream *xdr)
1487{
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492}
1493
1494static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495{
1496 __be32 *p;
1497
1498 p = reserve_space(xdr, 4);
1499 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500 encode_nfs4_stateid(xdr, stateid);
1501}
1502
1503static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504{
1505 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506 encode_openhdr(xdr, arg);
1507 encode_opentype(xdr, arg);
1508 switch (arg->claim) {
1509 case NFS4_OPEN_CLAIM_NULL:
1510 encode_claim_null(xdr, arg->name);
1511 break;
1512 case NFS4_OPEN_CLAIM_PREVIOUS:
1513 encode_claim_previous(xdr, arg->u.delegation_type);
1514 break;
1515 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517 break;
1518 case NFS4_OPEN_CLAIM_FH:
1519 encode_claim_fh(xdr);
1520 break;
1521 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523 break;
1524 default:
1525 BUG();
1526 }
1527}
1528
1529static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530{
1531 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532 encode_nfs4_stateid(xdr, arg->stateid);
1533 encode_nfs4_seqid(xdr, arg->seqid);
1534}
1535
1536static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537{
1538 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539 encode_nfs4_stateid(xdr, &arg->stateid);
1540 encode_nfs4_seqid(xdr, arg->seqid);
1541 encode_share_access(xdr, arg->share_access);
1542}
1543
1544static void
1545encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546{
1547 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548 encode_string(xdr, fh->size, fh->data);
1549}
1550
1551static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552{
1553 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554}
1555
1556static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1557 struct compound_hdr *hdr)
1558{
1559 __be32 *p;
1560
1561 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1562 encode_nfs4_stateid(xdr, &args->stateid);
1563
1564 p = reserve_space(xdr, 12);
1565 p = xdr_encode_hyper(p, args->offset);
1566 *p = cpu_to_be32(args->count);
1567}
1568
1569static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1570{
1571 uint32_t attrs[3] = {
1572 FATTR4_WORD0_RDATTR_ERROR,
1573 FATTR4_WORD1_MOUNTED_ON_FILEID,
1574 };
1575 uint32_t dircount = readdir->count >> 1;
1576 __be32 *p, verf[2];
1577 uint32_t attrlen = 0;
1578 unsigned int i;
1579
1580 if (readdir->plus) {
1581 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1582 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1583 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1584 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1585 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1586 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1587 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1588 dircount >>= 1;
1589 }
1590 /* Use mounted_on_fileid only if the server supports it */
1591 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1592 attrs[0] |= FATTR4_WORD0_FILEID;
1593 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1594 attrs[i] &= readdir->bitmask[i];
1595 if (attrs[i] != 0)
1596 attrlen = i+1;
1597 }
1598
1599 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1600 encode_uint64(xdr, readdir->cookie);
1601 encode_nfs4_verifier(xdr, &readdir->verifier);
1602 p = reserve_space(xdr, 12 + (attrlen << 2));
1603 *p++ = cpu_to_be32(dircount);
1604 *p++ = cpu_to_be32(readdir->count);
1605 *p++ = cpu_to_be32(attrlen);
1606 for (i = 0; i < attrlen; i++)
1607 *p++ = cpu_to_be32(attrs[i]);
1608 memcpy(verf, readdir->verifier.data, sizeof(verf));
1609
1610 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1611 __func__,
1612 (unsigned long long)readdir->cookie,
1613 verf[0], verf[1],
1614 attrs[0] & readdir->bitmask[0],
1615 attrs[1] & readdir->bitmask[1],
1616 attrs[2] & readdir->bitmask[2]);
1617}
1618
1619static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1620{
1621 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1622}
1623
1624static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1625{
1626 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1627 encode_string(xdr, name->len, name->name);
1628}
1629
1630static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1631{
1632 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1633 encode_string(xdr, oldname->len, oldname->name);
1634 encode_string(xdr, newname->len, newname->name);
1635}
1636
1637static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1638 struct compound_hdr *hdr)
1639{
1640 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1641 encode_uint64(xdr, clid);
1642}
1643
1644static void
1645encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1646{
1647 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1648}
1649
1650static void
1651encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1652{
1653 __be32 *p;
1654
1655 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1656 encode_nfs4_stateid(xdr, &zero_stateid);
1657 p = reserve_space(xdr, 2*4);
1658 *p++ = cpu_to_be32(1);
1659 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1660 p = reserve_space(xdr, 4);
1661 *p = cpu_to_be32(arg->acl_len);
1662 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1663}
1664
1665static void
1666encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667{
1668 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1669}
1670
1671static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1672{
1673 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1674 encode_nfs4_stateid(xdr, &arg->stateid);
1675 encode_attrs(xdr, arg->iap, arg->label, server, false);
1676}
1677
1678static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1679{
1680 __be32 *p;
1681
1682 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1683 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1684
1685 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1686 setclientid->sc_clnt->cl_owner_id);
1687 p = reserve_space(xdr, 4);
1688 *p = cpu_to_be32(setclientid->sc_prog);
1689 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1690 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1691 p = reserve_space(xdr, 4);
1692 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1693}
1694
1695static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1696{
1697 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1698 decode_setclientid_confirm_maxsz, hdr);
1699 encode_uint64(xdr, arg->clientid);
1700 encode_nfs4_verifier(xdr, &arg->confirm);
1701}
1702
1703static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1704 struct compound_hdr *hdr)
1705{
1706 __be32 *p;
1707
1708 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1709 encode_nfs4_stateid(xdr, &args->stateid);
1710
1711 p = reserve_space(xdr, 16);
1712 p = xdr_encode_hyper(p, args->offset);
1713 *p++ = cpu_to_be32(args->stable);
1714 *p = cpu_to_be32(args->count);
1715
1716 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1717}
1718
1719static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1720{
1721 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1722 encode_nfs4_stateid(xdr, stateid);
1723}
1724
1725static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1726{
1727 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1728 encode_string(xdr, name->len, name->name);
1729}
1730
1731#if defined(CONFIG_NFS_V4_1)
1732/* NFSv4.1 operations */
1733static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1734 struct nfs41_bind_conn_to_session_args *args,
1735 struct compound_hdr *hdr)
1736{
1737 __be32 *p;
1738
1739 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1740 decode_bind_conn_to_session_maxsz, hdr);
1741 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1742 p = xdr_reserve_space(xdr, 8);
1743 *p++ = cpu_to_be32(args->dir);
1744 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1745}
1746
1747static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1748{
1749 unsigned int i;
1750 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1751 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1752 encode_uint32(xdr, op_map->u.words[i]);
1753}
1754
1755static void encode_exchange_id(struct xdr_stream *xdr,
1756 struct nfs41_exchange_id_args *args,
1757 struct compound_hdr *hdr)
1758{
1759 __be32 *p;
1760 char impl_name[IMPL_NAME_LIMIT];
1761 int len = 0;
1762
1763 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1764 encode_nfs4_verifier(xdr, args->verifier);
1765
1766 encode_string(xdr, strlen(args->client->cl_owner_id),
1767 args->client->cl_owner_id);
1768
1769 encode_uint32(xdr, args->flags);
1770 encode_uint32(xdr, args->state_protect.how);
1771
1772 switch (args->state_protect.how) {
1773 case SP4_NONE:
1774 break;
1775 case SP4_MACH_CRED:
1776 encode_op_map(xdr, &args->state_protect.enforce);
1777 encode_op_map(xdr, &args->state_protect.allow);
1778 break;
1779 default:
1780 WARN_ON_ONCE(1);
1781 break;
1782 }
1783
1784 if (send_implementation_id &&
1785 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787 <= sizeof(impl_name) + 1)
1788 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789 utsname()->sysname, utsname()->release,
1790 utsname()->version, utsname()->machine);
1791
1792 if (len > 0) {
1793 encode_uint32(xdr, 1); /* implementation id array length=1 */
1794
1795 encode_string(xdr,
1796 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798 encode_string(xdr, len, impl_name);
1799 /* just send zeros for nii_date - the date is in nii_name */
1800 p = reserve_space(xdr, 12);
1801 p = xdr_encode_hyper(p, 0);
1802 *p = cpu_to_be32(0);
1803 } else
1804 encode_uint32(xdr, 0); /* implementation id array length=0 */
1805}
1806
1807static void encode_create_session(struct xdr_stream *xdr,
1808 struct nfs41_create_session_args *args,
1809 struct compound_hdr *hdr)
1810{
1811 __be32 *p;
1812 struct nfs_client *clp = args->client;
1813 struct rpc_clnt *clnt = clp->cl_rpcclient;
1814 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1815 u32 max_resp_sz_cached;
1816
1817 /*
1818 * Assumes OPEN is the biggest non-idempotent compound.
1819 * 2 is the verifier.
1820 */
1821 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1822 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1823
1824 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1825 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1826 p = xdr_encode_hyper(p, args->clientid);
1827 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1828 *p++ = cpu_to_be32(args->flags); /*flags */
1829
1830 /* Fore Channel */
1831 *p++ = cpu_to_be32(0); /* header padding size */
1832 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1833 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1834 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1835 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1837 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1838
1839 /* Back Channel */
1840 *p++ = cpu_to_be32(0); /* header padding size */
1841 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1842 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1843 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1844 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1846 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1847
1848 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1849 *p++ = cpu_to_be32(1);
1850 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1851
1852 /* authsys_parms rfc1831 */
1853 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1854 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1855 *p++ = cpu_to_be32(0); /* UID */
1856 *p++ = cpu_to_be32(0); /* GID */
1857 *p = cpu_to_be32(0); /* No more gids */
1858}
1859
1860static void encode_destroy_session(struct xdr_stream *xdr,
1861 struct nfs4_session *session,
1862 struct compound_hdr *hdr)
1863{
1864 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1865 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866}
1867
1868static void encode_destroy_clientid(struct xdr_stream *xdr,
1869 uint64_t clientid,
1870 struct compound_hdr *hdr)
1871{
1872 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1873 encode_uint64(xdr, clientid);
1874}
1875
1876static void encode_reclaim_complete(struct xdr_stream *xdr,
1877 struct nfs41_reclaim_complete_args *args,
1878 struct compound_hdr *hdr)
1879{
1880 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1881 encode_uint32(xdr, args->one_fs);
1882}
1883#endif /* CONFIG_NFS_V4_1 */
1884
1885static void encode_sequence(struct xdr_stream *xdr,
1886 const struct nfs4_sequence_args *args,
1887 struct compound_hdr *hdr)
1888{
1889#if defined(CONFIG_NFS_V4_1)
1890 struct nfs4_session *session;
1891 struct nfs4_slot_table *tp;
1892 struct nfs4_slot *slot = args->sa_slot;
1893 __be32 *p;
1894
1895 tp = slot->table;
1896 session = tp->session;
1897 if (!session)
1898 return;
1899
1900 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1901
1902 /*
1903 * Sessionid + seqid + slotid + max slotid + cache_this
1904 */
1905 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1906 "max_slotid=%d cache_this=%d\n",
1907 __func__,
1908 ((u32 *)session->sess_id.data)[0],
1909 ((u32 *)session->sess_id.data)[1],
1910 ((u32 *)session->sess_id.data)[2],
1911 ((u32 *)session->sess_id.data)[3],
1912 slot->seq_nr, slot->slot_nr,
1913 tp->highest_used_slotid, args->sa_cache_this);
1914 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1915 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1916 *p++ = cpu_to_be32(slot->seq_nr);
1917 *p++ = cpu_to_be32(slot->slot_nr);
1918 *p++ = cpu_to_be32(tp->highest_used_slotid);
1919 *p = cpu_to_be32(args->sa_cache_this);
1920#endif /* CONFIG_NFS_V4_1 */
1921}
1922
1923#ifdef CONFIG_NFS_V4_1
1924static void
1925encode_getdeviceinfo(struct xdr_stream *xdr,
1926 const struct nfs4_getdeviceinfo_args *args,
1927 struct compound_hdr *hdr)
1928{
1929 __be32 *p;
1930
1931 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1932 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1933 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1934 NFS4_DEVICEID4_SIZE);
1935 *p++ = cpu_to_be32(args->pdev->layout_type);
1936 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1937
1938 p = reserve_space(xdr, 4 + 4);
1939 *p++ = cpu_to_be32(1); /* bitmap length */
1940 *p++ = cpu_to_be32(args->notify_types);
1941}
1942
1943static void
1944encode_layoutget(struct xdr_stream *xdr,
1945 const struct nfs4_layoutget_args *args,
1946 struct compound_hdr *hdr)
1947{
1948 __be32 *p;
1949
1950 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1951 p = reserve_space(xdr, 36);
1952 *p++ = cpu_to_be32(0); /* Signal layout available */
1953 *p++ = cpu_to_be32(args->type);
1954 *p++ = cpu_to_be32(args->range.iomode);
1955 p = xdr_encode_hyper(p, args->range.offset);
1956 p = xdr_encode_hyper(p, args->range.length);
1957 p = xdr_encode_hyper(p, args->minlength);
1958 encode_nfs4_stateid(xdr, &args->stateid);
1959 encode_uint32(xdr, args->maxcount);
1960
1961 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1962 __func__,
1963 args->type,
1964 args->range.iomode,
1965 (unsigned long)args->range.offset,
1966 (unsigned long)args->range.length,
1967 args->maxcount);
1968}
1969
1970static int
1971encode_layoutcommit(struct xdr_stream *xdr,
1972 struct inode *inode,
1973 struct nfs4_layoutcommit_args *args,
1974 struct compound_hdr *hdr)
1975{
1976 __be32 *p;
1977
1978 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1979 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1980
1981 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1982 p = reserve_space(xdr, 20);
1983 /* Only whole file layouts */
1984 p = xdr_encode_hyper(p, 0); /* offset */
1985 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1986 *p = cpu_to_be32(0); /* reclaim */
1987 encode_nfs4_stateid(xdr, &args->stateid);
1988 p = reserve_space(xdr, 20);
1989 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1990 p = xdr_encode_hyper(p, args->lastbytewritten);
1991 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1992 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1993
1994 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1995 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1996 NFS_I(inode)->layout, xdr, args);
1997 } else {
1998 encode_uint32(xdr, args->layoutupdate_len);
1999 if (args->layoutupdate_pages) {
2000 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2001 args->layoutupdate_len);
2002 }
2003 }
2004
2005 return 0;
2006}
2007
2008static void
2009encode_layoutreturn(struct xdr_stream *xdr,
2010 const struct nfs4_layoutreturn_args *args,
2011 struct compound_hdr *hdr)
2012{
2013 __be32 *p;
2014
2015 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2016 p = reserve_space(xdr, 16);
2017 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2018 *p++ = cpu_to_be32(args->layout_type);
2019 *p++ = cpu_to_be32(args->range.iomode);
2020 *p = cpu_to_be32(RETURN_FILE);
2021 p = reserve_space(xdr, 16);
2022 p = xdr_encode_hyper(p, args->range.offset);
2023 p = xdr_encode_hyper(p, args->range.length);
2024 spin_lock(&args->inode->i_lock);
2025 encode_nfs4_stateid(xdr, &args->stateid);
2026 spin_unlock(&args->inode->i_lock);
2027 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2028 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2029 NFS_I(args->inode)->layout, xdr, args);
2030 } else
2031 encode_uint32(xdr, 0);
2032}
2033
2034static int
2035encode_secinfo_no_name(struct xdr_stream *xdr,
2036 const struct nfs41_secinfo_no_name_args *args,
2037 struct compound_hdr *hdr)
2038{
2039 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2040 encode_uint32(xdr, args->style);
2041 return 0;
2042}
2043
2044static void encode_test_stateid(struct xdr_stream *xdr,
2045 struct nfs41_test_stateid_args *args,
2046 struct compound_hdr *hdr)
2047{
2048 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2049 encode_uint32(xdr, 1);
2050 encode_nfs4_stateid(xdr, args->stateid);
2051}
2052
2053static void encode_free_stateid(struct xdr_stream *xdr,
2054 struct nfs41_free_stateid_args *args,
2055 struct compound_hdr *hdr)
2056{
2057 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2058 encode_nfs4_stateid(xdr, &args->stateid);
2059}
2060#endif /* CONFIG_NFS_V4_1 */
2061
2062/*
2063 * END OF "GENERIC" ENCODE ROUTINES.
2064 */
2065
2066static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2067{
2068#if defined(CONFIG_NFS_V4_1)
2069 struct nfs4_session *session = args->sa_slot->table->session;
2070 if (session)
2071 return session->clp->cl_mvops->minor_version;
2072#endif /* CONFIG_NFS_V4_1 */
2073 return 0;
2074}
2075
2076/*
2077 * Encode an ACCESS request
2078 */
2079static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2080 const struct nfs4_accessargs *args)
2081{
2082 struct compound_hdr hdr = {
2083 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2084 };
2085
2086 encode_compound_hdr(xdr, req, &hdr);
2087 encode_sequence(xdr, &args->seq_args, &hdr);
2088 encode_putfh(xdr, args->fh, &hdr);
2089 encode_access(xdr, args->access, &hdr);
2090 encode_getfattr(xdr, args->bitmask, &hdr);
2091 encode_nops(&hdr);
2092}
2093
2094/*
2095 * Encode LOOKUP request
2096 */
2097static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2098 const struct nfs4_lookup_arg *args)
2099{
2100 struct compound_hdr hdr = {
2101 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2102 };
2103
2104 encode_compound_hdr(xdr, req, &hdr);
2105 encode_sequence(xdr, &args->seq_args, &hdr);
2106 encode_putfh(xdr, args->dir_fh, &hdr);
2107 encode_lookup(xdr, args->name, &hdr);
2108 encode_getfh(xdr, &hdr);
2109 encode_getfattr(xdr, args->bitmask, &hdr);
2110 encode_nops(&hdr);
2111}
2112
2113/*
2114 * Encode LOOKUP_ROOT request
2115 */
2116static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2117 struct xdr_stream *xdr,
2118 const struct nfs4_lookup_root_arg *args)
2119{
2120 struct compound_hdr hdr = {
2121 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122 };
2123
2124 encode_compound_hdr(xdr, req, &hdr);
2125 encode_sequence(xdr, &args->seq_args, &hdr);
2126 encode_putrootfh(xdr, &hdr);
2127 encode_getfh(xdr, &hdr);
2128 encode_getfattr(xdr, args->bitmask, &hdr);
2129 encode_nops(&hdr);
2130}
2131
2132/*
2133 * Encode REMOVE request
2134 */
2135static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2136 const struct nfs_removeargs *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->fh, &hdr);
2145 encode_remove(xdr, &args->name, &hdr);
2146 encode_nops(&hdr);
2147}
2148
2149/*
2150 * Encode RENAME request
2151 */
2152static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2153 const struct nfs_renameargs *args)
2154{
2155 struct compound_hdr hdr = {
2156 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157 };
2158
2159 encode_compound_hdr(xdr, req, &hdr);
2160 encode_sequence(xdr, &args->seq_args, &hdr);
2161 encode_putfh(xdr, args->old_dir, &hdr);
2162 encode_savefh(xdr, &hdr);
2163 encode_putfh(xdr, args->new_dir, &hdr);
2164 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2165 encode_nops(&hdr);
2166}
2167
2168/*
2169 * Encode LINK request
2170 */
2171static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2172 const struct nfs4_link_arg *args)
2173{
2174 struct compound_hdr hdr = {
2175 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176 };
2177
2178 encode_compound_hdr(xdr, req, &hdr);
2179 encode_sequence(xdr, &args->seq_args, &hdr);
2180 encode_putfh(xdr, args->fh, &hdr);
2181 encode_savefh(xdr, &hdr);
2182 encode_putfh(xdr, args->dir_fh, &hdr);
2183 encode_link(xdr, args->name, &hdr);
2184 encode_restorefh(xdr, &hdr);
2185 encode_getfattr(xdr, args->bitmask, &hdr);
2186 encode_nops(&hdr);
2187}
2188
2189/*
2190 * Encode CREATE request
2191 */
2192static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2193 const struct nfs4_create_arg *args)
2194{
2195 struct compound_hdr hdr = {
2196 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197 };
2198
2199 encode_compound_hdr(xdr, req, &hdr);
2200 encode_sequence(xdr, &args->seq_args, &hdr);
2201 encode_putfh(xdr, args->dir_fh, &hdr);
2202 encode_create(xdr, args, &hdr);
2203 encode_getfh(xdr, &hdr);
2204 encode_getfattr(xdr, args->bitmask, &hdr);
2205 encode_nops(&hdr);
2206}
2207
2208/*
2209 * Encode SYMLINK request
2210 */
2211static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2212 const struct nfs4_create_arg *args)
2213{
2214 nfs4_xdr_enc_create(req, xdr, args);
2215}
2216
2217/*
2218 * Encode GETATTR request
2219 */
2220static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2221 const struct nfs4_getattr_arg *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_getfattr(xdr, args->bitmask, &hdr);
2231 encode_nops(&hdr);
2232}
2233
2234/*
2235 * Encode a CLOSE request
2236 */
2237static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2238 struct nfs_closeargs *args)
2239{
2240 struct compound_hdr hdr = {
2241 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2242 };
2243
2244 encode_compound_hdr(xdr, req, &hdr);
2245 encode_sequence(xdr, &args->seq_args, &hdr);
2246 encode_putfh(xdr, args->fh, &hdr);
2247 encode_close(xdr, args, &hdr);
2248 encode_getfattr(xdr, args->bitmask, &hdr);
2249 encode_nops(&hdr);
2250}
2251
2252/*
2253 * Encode an OPEN request
2254 */
2255static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2256 struct nfs_openargs *args)
2257{
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->fh, &hdr);
2265 encode_open(xdr, args, &hdr);
2266 encode_getfh(xdr, &hdr);
2267 if (args->access)
2268 encode_access(xdr, args->access, &hdr);
2269 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2270 encode_nops(&hdr);
2271}
2272
2273/*
2274 * Encode an OPEN_CONFIRM request
2275 */
2276static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2277 struct xdr_stream *xdr,
2278 struct nfs_open_confirmargs *args)
2279{
2280 struct compound_hdr hdr = {
2281 .nops = 0,
2282 };
2283
2284 encode_compound_hdr(xdr, req, &hdr);
2285 encode_putfh(xdr, args->fh, &hdr);
2286 encode_open_confirm(xdr, args, &hdr);
2287 encode_nops(&hdr);
2288}
2289
2290/*
2291 * Encode an OPEN request with no attributes.
2292 */
2293static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2294 struct xdr_stream *xdr,
2295 struct nfs_openargs *args)
2296{
2297 struct compound_hdr hdr = {
2298 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2299 };
2300
2301 encode_compound_hdr(xdr, req, &hdr);
2302 encode_sequence(xdr, &args->seq_args, &hdr);
2303 encode_putfh(xdr, args->fh, &hdr);
2304 encode_open(xdr, args, &hdr);
2305 if (args->access)
2306 encode_access(xdr, args->access, &hdr);
2307 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2308 encode_nops(&hdr);
2309}
2310
2311/*
2312 * Encode an OPEN_DOWNGRADE request
2313 */
2314static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2315 struct xdr_stream *xdr,
2316 struct nfs_closeargs *args)
2317{
2318 struct compound_hdr hdr = {
2319 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320 };
2321
2322 encode_compound_hdr(xdr, req, &hdr);
2323 encode_sequence(xdr, &args->seq_args, &hdr);
2324 encode_putfh(xdr, args->fh, &hdr);
2325 encode_open_downgrade(xdr, args, &hdr);
2326 encode_getfattr(xdr, args->bitmask, &hdr);
2327 encode_nops(&hdr);
2328}
2329
2330/*
2331 * Encode a LOCK request
2332 */
2333static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2334 struct nfs_lock_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_lock(xdr, args, &hdr);
2344 encode_nops(&hdr);
2345}
2346
2347/*
2348 * Encode a LOCKT request
2349 */
2350static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2351 struct nfs_lockt_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_lockt(xdr, args, &hdr);
2361 encode_nops(&hdr);
2362}
2363
2364/*
2365 * Encode a LOCKU request
2366 */
2367static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2368 struct nfs_locku_args *args)
2369{
2370 struct compound_hdr hdr = {
2371 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372 };
2373
2374 encode_compound_hdr(xdr, req, &hdr);
2375 encode_sequence(xdr, &args->seq_args, &hdr);
2376 encode_putfh(xdr, args->fh, &hdr);
2377 encode_locku(xdr, args, &hdr);
2378 encode_nops(&hdr);
2379}
2380
2381static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2382 struct xdr_stream *xdr,
2383 struct nfs_release_lockowner_args *args)
2384{
2385 struct compound_hdr hdr = {
2386 .minorversion = 0,
2387 };
2388
2389 encode_compound_hdr(xdr, req, &hdr);
2390 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2391 encode_nops(&hdr);
2392}
2393
2394/*
2395 * Encode a READLINK request
2396 */
2397static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2398 const struct nfs4_readlink *args)
2399{
2400 struct compound_hdr hdr = {
2401 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402 };
2403
2404 encode_compound_hdr(xdr, req, &hdr);
2405 encode_sequence(xdr, &args->seq_args, &hdr);
2406 encode_putfh(xdr, args->fh, &hdr);
2407 encode_readlink(xdr, args, req, &hdr);
2408
2409 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2410 args->pgbase, args->pglen);
2411 encode_nops(&hdr);
2412}
2413
2414/*
2415 * Encode a READDIR request
2416 */
2417static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2418 const struct nfs4_readdir_arg *args)
2419{
2420 struct compound_hdr hdr = {
2421 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2422 };
2423
2424 encode_compound_hdr(xdr, req, &hdr);
2425 encode_sequence(xdr, &args->seq_args, &hdr);
2426 encode_putfh(xdr, args->fh, &hdr);
2427 encode_readdir(xdr, args, req, &hdr);
2428
2429 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2430 args->pgbase, args->count);
2431 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2432 __func__, hdr.replen << 2, args->pages,
2433 args->pgbase, args->count);
2434 encode_nops(&hdr);
2435}
2436
2437/*
2438 * Encode a READ request
2439 */
2440static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2441 struct nfs_pgio_args *args)
2442{
2443 struct compound_hdr hdr = {
2444 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445 };
2446
2447 encode_compound_hdr(xdr, req, &hdr);
2448 encode_sequence(xdr, &args->seq_args, &hdr);
2449 encode_putfh(xdr, args->fh, &hdr);
2450 encode_read(xdr, args, &hdr);
2451
2452 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2453 args->pages, args->pgbase, args->count);
2454 req->rq_rcv_buf.flags |= XDRBUF_READ;
2455 encode_nops(&hdr);
2456}
2457
2458/*
2459 * Encode an SETATTR request
2460 */
2461static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2462 struct nfs_setattrargs *args)
2463{
2464 struct compound_hdr hdr = {
2465 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466 };
2467
2468 encode_compound_hdr(xdr, req, &hdr);
2469 encode_sequence(xdr, &args->seq_args, &hdr);
2470 encode_putfh(xdr, args->fh, &hdr);
2471 encode_setattr(xdr, args, args->server, &hdr);
2472 encode_getfattr(xdr, args->bitmask, &hdr);
2473 encode_nops(&hdr);
2474}
2475
2476/*
2477 * Encode a GETACL request
2478 */
2479static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2480 struct nfs_getaclargs *args)
2481{
2482 struct compound_hdr hdr = {
2483 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2484 };
2485 uint32_t replen;
2486
2487 encode_compound_hdr(xdr, req, &hdr);
2488 encode_sequence(xdr, &args->seq_args, &hdr);
2489 encode_putfh(xdr, args->fh, &hdr);
2490 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2491 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2492
2493 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2494 args->acl_pages, 0, args->acl_len);
2495
2496 encode_nops(&hdr);
2497}
2498
2499/*
2500 * Encode a WRITE request
2501 */
2502static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2503 struct nfs_pgio_args *args)
2504{
2505 struct compound_hdr hdr = {
2506 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507 };
2508
2509 encode_compound_hdr(xdr, req, &hdr);
2510 encode_sequence(xdr, &args->seq_args, &hdr);
2511 encode_putfh(xdr, args->fh, &hdr);
2512 encode_write(xdr, args, &hdr);
2513 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2514 if (args->bitmask)
2515 encode_getfattr(xdr, args->bitmask, &hdr);
2516 encode_nops(&hdr);
2517}
2518
2519/*
2520 * a COMMIT request
2521 */
2522static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2523 struct nfs_commitargs *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_commit(xdr, args, &hdr);
2533 encode_nops(&hdr);
2534}
2535
2536/*
2537 * FSINFO request
2538 */
2539static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 struct nfs4_fsinfo_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_fsinfo(xdr, args->bitmask, &hdr);
2550 encode_nops(&hdr);
2551}
2552
2553/*
2554 * a PATHCONF request
2555 */
2556static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2557 const struct nfs4_pathconf_arg *args)
2558{
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562
2563 encode_compound_hdr(xdr, req, &hdr);
2564 encode_sequence(xdr, &args->seq_args, &hdr);
2565 encode_putfh(xdr, args->fh, &hdr);
2566 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2567 &hdr);
2568 encode_nops(&hdr);
2569}
2570
2571/*
2572 * a STATFS request
2573 */
2574static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 const struct nfs4_statfs_arg *args)
2576{
2577 struct compound_hdr hdr = {
2578 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2579 };
2580
2581 encode_compound_hdr(xdr, req, &hdr);
2582 encode_sequence(xdr, &args->seq_args, &hdr);
2583 encode_putfh(xdr, args->fh, &hdr);
2584 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2585 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2586 encode_nops(&hdr);
2587}
2588
2589/*
2590 * GETATTR_BITMAP request
2591 */
2592static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2593 struct xdr_stream *xdr,
2594 struct nfs4_server_caps_arg *args)
2595{
2596 const u32 *bitmask = args->bitmask;
2597 struct compound_hdr hdr = {
2598 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2599 };
2600
2601 encode_compound_hdr(xdr, req, &hdr);
2602 encode_sequence(xdr, &args->seq_args, &hdr);
2603 encode_putfh(xdr, args->fhandle, &hdr);
2604 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2605 encode_nops(&hdr);
2606}
2607
2608/*
2609 * a RENEW request
2610 */
2611static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2612 struct nfs_client *clp)
2613{
2614 struct compound_hdr hdr = {
2615 .nops = 0,
2616 };
2617
2618 encode_compound_hdr(xdr, req, &hdr);
2619 encode_renew(xdr, clp->cl_clientid, &hdr);
2620 encode_nops(&hdr);
2621}
2622
2623/*
2624 * a SETCLIENTID request
2625 */
2626static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2627 struct xdr_stream *xdr,
2628 struct nfs4_setclientid *sc)
2629{
2630 struct compound_hdr hdr = {
2631 .nops = 0,
2632 };
2633
2634 encode_compound_hdr(xdr, req, &hdr);
2635 encode_setclientid(xdr, sc, &hdr);
2636 encode_nops(&hdr);
2637}
2638
2639/*
2640 * a SETCLIENTID_CONFIRM request
2641 */
2642static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2643 struct xdr_stream *xdr,
2644 struct nfs4_setclientid_res *arg)
2645{
2646 struct compound_hdr hdr = {
2647 .nops = 0,
2648 };
2649
2650 encode_compound_hdr(xdr, req, &hdr);
2651 encode_setclientid_confirm(xdr, arg, &hdr);
2652 encode_nops(&hdr);
2653}
2654
2655/*
2656 * DELEGRETURN request
2657 */
2658static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2659 struct xdr_stream *xdr,
2660 const struct nfs4_delegreturnargs *args)
2661{
2662 struct compound_hdr hdr = {
2663 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664 };
2665
2666 encode_compound_hdr(xdr, req, &hdr);
2667 encode_sequence(xdr, &args->seq_args, &hdr);
2668 encode_putfh(xdr, args->fhandle, &hdr);
2669 encode_getfattr(xdr, args->bitmask, &hdr);
2670 encode_delegreturn(xdr, args->stateid, &hdr);
2671 encode_nops(&hdr);
2672}
2673
2674/*
2675 * Encode FS_LOCATIONS request
2676 */
2677static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2678 struct xdr_stream *xdr,
2679 struct nfs4_fs_locations_arg *args)
2680{
2681 struct compound_hdr hdr = {
2682 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683 };
2684 uint32_t replen;
2685
2686 encode_compound_hdr(xdr, req, &hdr);
2687 encode_sequence(xdr, &args->seq_args, &hdr);
2688 if (args->migration) {
2689 encode_putfh(xdr, args->fh, &hdr);
2690 replen = hdr.replen;
2691 encode_fs_locations(xdr, args->bitmask, &hdr);
2692 if (args->renew)
2693 encode_renew(xdr, args->clientid, &hdr);
2694 } else {
2695 encode_putfh(xdr, args->dir_fh, &hdr);
2696 encode_lookup(xdr, args->name, &hdr);
2697 replen = hdr.replen;
2698 encode_fs_locations(xdr, args->bitmask, &hdr);
2699 }
2700
2701 /* Set up reply kvec to capture returned fs_locations array. */
2702 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2703 0, PAGE_SIZE);
2704 encode_nops(&hdr);
2705}
2706
2707/*
2708 * Encode SECINFO request
2709 */
2710static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2711 struct xdr_stream *xdr,
2712 struct nfs4_secinfo_arg *args)
2713{
2714 struct compound_hdr hdr = {
2715 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716 };
2717
2718 encode_compound_hdr(xdr, req, &hdr);
2719 encode_sequence(xdr, &args->seq_args, &hdr);
2720 encode_putfh(xdr, args->dir_fh, &hdr);
2721 encode_secinfo(xdr, args->name, &hdr);
2722 encode_nops(&hdr);
2723}
2724
2725/*
2726 * Encode FSID_PRESENT request
2727 */
2728static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 struct nfs4_fsid_present_arg *args)
2731{
2732 struct compound_hdr hdr = {
2733 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734 };
2735
2736 encode_compound_hdr(xdr, req, &hdr);
2737 encode_sequence(xdr, &args->seq_args, &hdr);
2738 encode_putfh(xdr, args->fh, &hdr);
2739 encode_getfh(xdr, &hdr);
2740 if (args->renew)
2741 encode_renew(xdr, args->clientid, &hdr);
2742 encode_nops(&hdr);
2743}
2744
2745#if defined(CONFIG_NFS_V4_1)
2746/*
2747 * BIND_CONN_TO_SESSION request
2748 */
2749static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2750 struct xdr_stream *xdr,
2751 struct nfs41_bind_conn_to_session_args *args)
2752{
2753 struct compound_hdr hdr = {
2754 .minorversion = args->client->cl_mvops->minor_version,
2755 };
2756
2757 encode_compound_hdr(xdr, req, &hdr);
2758 encode_bind_conn_to_session(xdr, args, &hdr);
2759 encode_nops(&hdr);
2760}
2761
2762/*
2763 * EXCHANGE_ID request
2764 */
2765static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2766 struct xdr_stream *xdr,
2767 struct nfs41_exchange_id_args *args)
2768{
2769 struct compound_hdr hdr = {
2770 .minorversion = args->client->cl_mvops->minor_version,
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_exchange_id(xdr, args, &hdr);
2775 encode_nops(&hdr);
2776}
2777
2778/*
2779 * a CREATE_SESSION request
2780 */
2781static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2782 struct xdr_stream *xdr,
2783 struct nfs41_create_session_args *args)
2784{
2785 struct compound_hdr hdr = {
2786 .minorversion = args->client->cl_mvops->minor_version,
2787 };
2788
2789 encode_compound_hdr(xdr, req, &hdr);
2790 encode_create_session(xdr, args, &hdr);
2791 encode_nops(&hdr);
2792}
2793
2794/*
2795 * a DESTROY_SESSION request
2796 */
2797static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2798 struct xdr_stream *xdr,
2799 struct nfs4_session *session)
2800{
2801 struct compound_hdr hdr = {
2802 .minorversion = session->clp->cl_mvops->minor_version,
2803 };
2804
2805 encode_compound_hdr(xdr, req, &hdr);
2806 encode_destroy_session(xdr, session, &hdr);
2807 encode_nops(&hdr);
2808}
2809
2810/*
2811 * a DESTROY_CLIENTID request
2812 */
2813static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2814 struct xdr_stream *xdr,
2815 struct nfs_client *clp)
2816{
2817 struct compound_hdr hdr = {
2818 .minorversion = clp->cl_mvops->minor_version,
2819 };
2820
2821 encode_compound_hdr(xdr, req, &hdr);
2822 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2823 encode_nops(&hdr);
2824}
2825
2826/*
2827 * a SEQUENCE request
2828 */
2829static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2830 struct nfs4_sequence_args *args)
2831{
2832 struct compound_hdr hdr = {
2833 .minorversion = nfs4_xdr_minorversion(args),
2834 };
2835
2836 encode_compound_hdr(xdr, req, &hdr);
2837 encode_sequence(xdr, args, &hdr);
2838 encode_nops(&hdr);
2839}
2840
2841/*
2842 * a GET_LEASE_TIME request
2843 */
2844static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2845 struct xdr_stream *xdr,
2846 struct nfs4_get_lease_time_args *args)
2847{
2848 struct compound_hdr hdr = {
2849 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2850 };
2851 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2852
2853 encode_compound_hdr(xdr, req, &hdr);
2854 encode_sequence(xdr, &args->la_seq_args, &hdr);
2855 encode_putrootfh(xdr, &hdr);
2856 encode_fsinfo(xdr, lease_bitmap, &hdr);
2857 encode_nops(&hdr);
2858}
2859
2860/*
2861 * a RECLAIM_COMPLETE request
2862 */
2863static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2864 struct xdr_stream *xdr,
2865 struct nfs41_reclaim_complete_args *args)
2866{
2867 struct compound_hdr hdr = {
2868 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2869 };
2870
2871 encode_compound_hdr(xdr, req, &hdr);
2872 encode_sequence(xdr, &args->seq_args, &hdr);
2873 encode_reclaim_complete(xdr, args, &hdr);
2874 encode_nops(&hdr);
2875}
2876
2877/*
2878 * Encode GETDEVICEINFO request
2879 */
2880static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2881 struct xdr_stream *xdr,
2882 struct nfs4_getdeviceinfo_args *args)
2883{
2884 struct compound_hdr hdr = {
2885 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2886 };
2887
2888 encode_compound_hdr(xdr, req, &hdr);
2889 encode_sequence(xdr, &args->seq_args, &hdr);
2890 encode_getdeviceinfo(xdr, args, &hdr);
2891
2892 /* set up reply kvec. Subtract notification bitmap max size (2)
2893 * so that notification bitmap is put in xdr_buf tail */
2894 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2895 args->pdev->pages, args->pdev->pgbase,
2896 args->pdev->pglen);
2897
2898 encode_nops(&hdr);
2899}
2900
2901/*
2902 * Encode LAYOUTGET request
2903 */
2904static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2905 struct xdr_stream *xdr,
2906 struct nfs4_layoutget_args *args)
2907{
2908 struct compound_hdr hdr = {
2909 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910 };
2911
2912 encode_compound_hdr(xdr, req, &hdr);
2913 encode_sequence(xdr, &args->seq_args, &hdr);
2914 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2915 encode_layoutget(xdr, args, &hdr);
2916
2917 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2918 args->layout.pages, 0, args->layout.pglen);
2919
2920 encode_nops(&hdr);
2921}
2922
2923/*
2924 * Encode LAYOUTCOMMIT request
2925 */
2926static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2927 struct xdr_stream *xdr,
2928 struct nfs4_layoutcommit_args *args)
2929{
2930 struct nfs4_layoutcommit_data *data =
2931 container_of(args, struct nfs4_layoutcommit_data, args);
2932 struct compound_hdr hdr = {
2933 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934 };
2935
2936 encode_compound_hdr(xdr, req, &hdr);
2937 encode_sequence(xdr, &args->seq_args, &hdr);
2938 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2940 encode_getfattr(xdr, args->bitmask, &hdr);
2941 encode_nops(&hdr);
2942}
2943
2944/*
2945 * Encode LAYOUTRETURN request
2946 */
2947static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2948 struct xdr_stream *xdr,
2949 struct nfs4_layoutreturn_args *args)
2950{
2951 struct compound_hdr hdr = {
2952 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2953 };
2954
2955 encode_compound_hdr(xdr, req, &hdr);
2956 encode_sequence(xdr, &args->seq_args, &hdr);
2957 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2958 encode_layoutreturn(xdr, args, &hdr);
2959 encode_nops(&hdr);
2960}
2961
2962/*
2963 * Encode SECINFO_NO_NAME request
2964 */
2965static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2966 struct xdr_stream *xdr,
2967 struct nfs41_secinfo_no_name_args *args)
2968{
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971 };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->seq_args, &hdr);
2975 encode_putrootfh(xdr, &hdr);
2976 encode_secinfo_no_name(xdr, args, &hdr);
2977 encode_nops(&hdr);
2978 return 0;
2979}
2980
2981/*
2982 * Encode TEST_STATEID request
2983 */
2984static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2985 struct xdr_stream *xdr,
2986 struct nfs41_test_stateid_args *args)
2987{
2988 struct compound_hdr hdr = {
2989 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2990 };
2991
2992 encode_compound_hdr(xdr, req, &hdr);
2993 encode_sequence(xdr, &args->seq_args, &hdr);
2994 encode_test_stateid(xdr, args, &hdr);
2995 encode_nops(&hdr);
2996}
2997
2998/*
2999 * Encode FREE_STATEID request
3000 */
3001static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3002 struct xdr_stream *xdr,
3003 struct nfs41_free_stateid_args *args)
3004{
3005 struct compound_hdr hdr = {
3006 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007 };
3008
3009 encode_compound_hdr(xdr, req, &hdr);
3010 encode_sequence(xdr, &args->seq_args, &hdr);
3011 encode_free_stateid(xdr, args, &hdr);
3012 encode_nops(&hdr);
3013}
3014#endif /* CONFIG_NFS_V4_1 */
3015
3016static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3017{
3018 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3019 "Remaining buffer length is %tu words.\n",
3020 func, xdr->end - xdr->p);
3021}
3022
3023static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3024{
3025 __be32 *p;
3026
3027 p = xdr_inline_decode(xdr, 4);
3028 if (unlikely(!p))
3029 goto out_overflow;
3030 *len = be32_to_cpup(p);
3031 p = xdr_inline_decode(xdr, *len);
3032 if (unlikely(!p))
3033 goto out_overflow;
3034 *string = (char *)p;
3035 return 0;
3036out_overflow:
3037 print_overflow_msg(__func__, xdr);
3038 return -EIO;
3039}
3040
3041static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3042{
3043 __be32 *p;
3044
3045 p = xdr_inline_decode(xdr, 8);
3046 if (unlikely(!p))
3047 goto out_overflow;
3048 hdr->status = be32_to_cpup(p++);
3049 hdr->taglen = be32_to_cpup(p);
3050
3051 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3052 if (unlikely(!p))
3053 goto out_overflow;
3054 hdr->tag = (char *)p;
3055 p += XDR_QUADLEN(hdr->taglen);
3056 hdr->nops = be32_to_cpup(p);
3057 if (unlikely(hdr->nops < 1))
3058 return nfs4_stat_to_errno(hdr->status);
3059 return 0;
3060out_overflow:
3061 print_overflow_msg(__func__, xdr);
3062 return -EIO;
3063}
3064
3065static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3066 int *nfs_retval)
3067{
3068 __be32 *p;
3069 uint32_t opnum;
3070 int32_t nfserr;
3071
3072 p = xdr_inline_decode(xdr, 8);
3073 if (unlikely(!p))
3074 goto out_overflow;
3075 opnum = be32_to_cpup(p++);
3076 if (unlikely(opnum != expected))
3077 goto out_bad_operation;
3078 nfserr = be32_to_cpup(p);
3079 if (nfserr == NFS_OK)
3080 *nfs_retval = 0;
3081 else
3082 *nfs_retval = nfs4_stat_to_errno(nfserr);
3083 return true;
3084out_bad_operation:
3085 dprintk("nfs: Server returned operation"
3086 " %d but we issued a request for %d\n",
3087 opnum, expected);
3088 *nfs_retval = -EREMOTEIO;
3089 return false;
3090out_overflow:
3091 print_overflow_msg(__func__, xdr);
3092 *nfs_retval = -EIO;
3093 return false;
3094}
3095
3096static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3097{
3098 int retval;
3099
3100 __decode_op_hdr(xdr, expected, &retval);
3101 return retval;
3102}
3103
3104/* Dummy routine */
3105static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3106{
3107 __be32 *p;
3108 unsigned int strlen;
3109 char *str;
3110
3111 p = xdr_inline_decode(xdr, 12);
3112 if (likely(p))
3113 return decode_opaque_inline(xdr, &strlen, &str);
3114 print_overflow_msg(__func__, xdr);
3115 return -EIO;
3116}
3117
3118static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3119{
3120 uint32_t bmlen;
3121 __be32 *p;
3122
3123 p = xdr_inline_decode(xdr, 4);
3124 if (unlikely(!p))
3125 goto out_overflow;
3126 bmlen = be32_to_cpup(p);
3127
3128 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3129 p = xdr_inline_decode(xdr, (bmlen << 2));
3130 if (unlikely(!p))
3131 goto out_overflow;
3132 if (bmlen > 0) {
3133 bitmap[0] = be32_to_cpup(p++);
3134 if (bmlen > 1) {
3135 bitmap[1] = be32_to_cpup(p++);
3136 if (bmlen > 2)
3137 bitmap[2] = be32_to_cpup(p);
3138 }
3139 }
3140 return 0;
3141out_overflow:
3142 print_overflow_msg(__func__, xdr);
3143 return -EIO;
3144}
3145
3146static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3147{
3148 __be32 *p;
3149
3150 p = xdr_inline_decode(xdr, 4);
3151 if (unlikely(!p))
3152 goto out_overflow;
3153 *attrlen = be32_to_cpup(p);
3154 *savep = xdr_stream_pos(xdr);
3155 return 0;
3156out_overflow:
3157 print_overflow_msg(__func__, xdr);
3158 return -EIO;
3159}
3160
3161static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3162{
3163 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3164 int ret;
3165 ret = decode_attr_bitmap(xdr, bitmask);
3166 if (unlikely(ret < 0))
3167 return ret;
3168 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3169 } else
3170 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3171 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3172 bitmask[0], bitmask[1], bitmask[2]);
3173 return 0;
3174}
3175
3176static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3177{
3178 __be32 *p;
3179 int ret = 0;
3180
3181 *type = 0;
3182 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3183 return -EIO;
3184 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3185 p = xdr_inline_decode(xdr, 4);
3186 if (unlikely(!p))
3187 goto out_overflow;
3188 *type = be32_to_cpup(p);
3189 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3190 dprintk("%s: bad type %d\n", __func__, *type);
3191 return -EIO;
3192 }
3193 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3194 ret = NFS_ATTR_FATTR_TYPE;
3195 }
3196 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3197 return ret;
3198out_overflow:
3199 print_overflow_msg(__func__, xdr);
3200 return -EIO;
3201}
3202
3203static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3204 uint32_t *bitmap, uint32_t *type)
3205{
3206 __be32 *p;
3207
3208 *type = 0;
3209 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3210 return -EIO;
3211 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3212 p = xdr_inline_decode(xdr, 4);
3213 if (unlikely(!p))
3214 goto out_overflow;
3215 *type = be32_to_cpup(p);
3216 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3217 }
3218 dprintk("%s: expire type=0x%x\n", __func__, *type);
3219 return 0;
3220out_overflow:
3221 print_overflow_msg(__func__, xdr);
3222 return -EIO;
3223}
3224
3225static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3226{
3227 __be32 *p;
3228 int ret = 0;
3229
3230 *change = 0;
3231 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3232 return -EIO;
3233 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3234 p = xdr_inline_decode(xdr, 8);
3235 if (unlikely(!p))
3236 goto out_overflow;
3237 xdr_decode_hyper(p, change);
3238 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3239 ret = NFS_ATTR_FATTR_CHANGE;
3240 }
3241 dprintk("%s: change attribute=%Lu\n", __func__,
3242 (unsigned long long)*change);
3243 return ret;
3244out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247}
3248
3249static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3250{
3251 __be32 *p;
3252 int ret = 0;
3253
3254 *size = 0;
3255 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3256 return -EIO;
3257 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3258 p = xdr_inline_decode(xdr, 8);
3259 if (unlikely(!p))
3260 goto out_overflow;
3261 xdr_decode_hyper(p, size);
3262 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3263 ret = NFS_ATTR_FATTR_SIZE;
3264 }
3265 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3266 return ret;
3267out_overflow:
3268 print_overflow_msg(__func__, xdr);
3269 return -EIO;
3270}
3271
3272static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3273{
3274 __be32 *p;
3275
3276 *res = 0;
3277 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3278 return -EIO;
3279 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3280 p = xdr_inline_decode(xdr, 4);
3281 if (unlikely(!p))
3282 goto out_overflow;
3283 *res = be32_to_cpup(p);
3284 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3285 }
3286 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3287 return 0;
3288out_overflow:
3289 print_overflow_msg(__func__, xdr);
3290 return -EIO;
3291}
3292
3293static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294{
3295 __be32 *p;
3296
3297 *res = 0;
3298 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3299 return -EIO;
3300 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3301 p = xdr_inline_decode(xdr, 4);
3302 if (unlikely(!p))
3303 goto out_overflow;
3304 *res = be32_to_cpup(p);
3305 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3306 }
3307 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3308 return 0;
3309out_overflow:
3310 print_overflow_msg(__func__, xdr);
3311 return -EIO;
3312}
3313
3314static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3315{
3316 __be32 *p;
3317 int ret = 0;
3318
3319 fsid->major = 0;
3320 fsid->minor = 0;
3321 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3322 return -EIO;
3323 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3324 p = xdr_inline_decode(xdr, 16);
3325 if (unlikely(!p))
3326 goto out_overflow;
3327 p = xdr_decode_hyper(p, &fsid->major);
3328 xdr_decode_hyper(p, &fsid->minor);
3329 bitmap[0] &= ~FATTR4_WORD0_FSID;
3330 ret = NFS_ATTR_FATTR_FSID;
3331 }
3332 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3333 (unsigned long long)fsid->major,
3334 (unsigned long long)fsid->minor);
3335 return ret;
3336out_overflow:
3337 print_overflow_msg(__func__, xdr);
3338 return -EIO;
3339}
3340
3341static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3342{
3343 __be32 *p;
3344
3345 *res = 60;
3346 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3347 return -EIO;
3348 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3349 p = xdr_inline_decode(xdr, 4);
3350 if (unlikely(!p))
3351 goto out_overflow;
3352 *res = be32_to_cpup(p);
3353 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3354 }
3355 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3356 return 0;
3357out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360}
3361
3362static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3363{
3364 __be32 *p;
3365
3366 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3367 return -EIO;
3368 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3369 p = xdr_inline_decode(xdr, 4);
3370 if (unlikely(!p))
3371 goto out_overflow;
3372 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3373 *res = -be32_to_cpup(p);
3374 }
3375 return 0;
3376out_overflow:
3377 print_overflow_msg(__func__, xdr);
3378 return -EIO;
3379}
3380
3381static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3382 uint32_t *bitmap, uint32_t *bitmask)
3383{
3384 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3385 int ret;
3386 ret = decode_attr_bitmap(xdr, bitmask);
3387 if (unlikely(ret < 0))
3388 return ret;
3389 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3390 } else
3391 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3392 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3393 bitmask[0], bitmask[1], bitmask[2]);
3394 return 0;
3395}
3396
3397static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3398{
3399 __be32 *p;
3400 int len;
3401
3402 if (fh != NULL)
3403 memset(fh, 0, sizeof(*fh));
3404
3405 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3406 return -EIO;
3407 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3408 p = xdr_inline_decode(xdr, 4);
3409 if (unlikely(!p))
3410 goto out_overflow;
3411 len = be32_to_cpup(p);
3412 if (len > NFS4_FHSIZE)
3413 return -EIO;
3414 p = xdr_inline_decode(xdr, len);
3415 if (unlikely(!p))
3416 goto out_overflow;
3417 if (fh != NULL) {
3418 memcpy(fh->data, p, len);
3419 fh->size = len;
3420 }
3421 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3422 }
3423 return 0;
3424out_overflow:
3425 print_overflow_msg(__func__, xdr);
3426 return -EIO;
3427}
3428
3429static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3430{
3431 __be32 *p;
3432
3433 *res = 0;
3434 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3435 return -EIO;
3436 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3437 p = xdr_inline_decode(xdr, 4);
3438 if (unlikely(!p))
3439 goto out_overflow;
3440 *res = be32_to_cpup(p);
3441 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3442 }
3443 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3444 return 0;
3445out_overflow:
3446 print_overflow_msg(__func__, xdr);
3447 return -EIO;
3448}
3449
3450static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3451{
3452 __be32 *p;
3453 int ret = 0;
3454
3455 *fileid = 0;
3456 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3457 return -EIO;
3458 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3459 p = xdr_inline_decode(xdr, 8);
3460 if (unlikely(!p))
3461 goto out_overflow;
3462 xdr_decode_hyper(p, fileid);
3463 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3464 ret = NFS_ATTR_FATTR_FILEID;
3465 }
3466 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3467 return ret;
3468out_overflow:
3469 print_overflow_msg(__func__, xdr);
3470 return -EIO;
3471}
3472
3473static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3474{
3475 __be32 *p;
3476 int ret = 0;
3477
3478 *fileid = 0;
3479 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3480 return -EIO;
3481 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3482 p = xdr_inline_decode(xdr, 8);
3483 if (unlikely(!p))
3484 goto out_overflow;
3485 xdr_decode_hyper(p, fileid);
3486 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3487 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3488 }
3489 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3490 return ret;
3491out_overflow:
3492 print_overflow_msg(__func__, xdr);
3493 return -EIO;
3494}
3495
3496static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3497{
3498 __be32 *p;
3499 int status = 0;
3500
3501 *res = 0;
3502 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3503 return -EIO;
3504 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3505 p = xdr_inline_decode(xdr, 8);
3506 if (unlikely(!p))
3507 goto out_overflow;
3508 xdr_decode_hyper(p, res);
3509 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3510 }
3511 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3512 return status;
3513out_overflow:
3514 print_overflow_msg(__func__, xdr);
3515 return -EIO;
3516}
3517
3518static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3519{
3520 __be32 *p;
3521 int status = 0;
3522
3523 *res = 0;
3524 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3525 return -EIO;
3526 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3527 p = xdr_inline_decode(xdr, 8);
3528 if (unlikely(!p))
3529 goto out_overflow;
3530 xdr_decode_hyper(p, res);
3531 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3532 }
3533 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3534 return status;
3535out_overflow:
3536 print_overflow_msg(__func__, xdr);
3537 return -EIO;
3538}
3539
3540static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3541{
3542 __be32 *p;
3543 int status = 0;
3544
3545 *res = 0;
3546 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3547 return -EIO;
3548 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3549 p = xdr_inline_decode(xdr, 8);
3550 if (unlikely(!p))
3551 goto out_overflow;
3552 xdr_decode_hyper(p, res);
3553 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3554 }
3555 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3556 return status;
3557out_overflow:
3558 print_overflow_msg(__func__, xdr);
3559 return -EIO;
3560}
3561
3562static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3563{
3564 u32 n;
3565 __be32 *p;
3566 int status = 0;
3567
3568 p = xdr_inline_decode(xdr, 4);
3569 if (unlikely(!p))
3570 goto out_overflow;
3571 n = be32_to_cpup(p);
3572 if (n == 0)
3573 goto root_path;
3574 dprintk("pathname4: ");
3575 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3576 dprintk("cannot parse %d components in path\n", n);
3577 goto out_eio;
3578 }
3579 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3580 struct nfs4_string *component = &path->components[path->ncomponents];
3581 status = decode_opaque_inline(xdr, &component->len, &component->data);
3582 if (unlikely(status != 0))
3583 goto out_eio;
3584 ifdebug (XDR)
3585 pr_cont("%s%.*s ",
3586 (path->ncomponents != n ? "/ " : ""),
3587 component->len, component->data);
3588 }
3589out:
3590 return status;
3591root_path:
3592/* a root pathname is sent as a zero component4 */
3593 path->ncomponents = 1;
3594 path->components[0].len=0;
3595 path->components[0].data=NULL;
3596 dprintk("pathname4: /\n");
3597 goto out;
3598out_eio:
3599 dprintk(" status %d", status);
3600 status = -EIO;
3601 goto out;
3602out_overflow:
3603 print_overflow_msg(__func__, xdr);
3604 return -EIO;
3605}
3606
3607static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3608{
3609 int n;
3610 __be32 *p;
3611 int status = -EIO;
3612
3613 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3614 goto out;
3615 status = 0;
3616 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3617 goto out;
3618 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3619 status = -EIO;
3620 /* Ignore borken servers that return unrequested attrs */
3621 if (unlikely(res == NULL))
3622 goto out;
3623 dprintk("%s: fsroot:\n", __func__);
3624 status = decode_pathname(xdr, &res->fs_path);
3625 if (unlikely(status != 0))
3626 goto out;
3627 p = xdr_inline_decode(xdr, 4);
3628 if (unlikely(!p))
3629 goto out_overflow;
3630 n = be32_to_cpup(p);
3631 if (n <= 0)
3632 goto out_eio;
3633 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3634 u32 m;
3635 struct nfs4_fs_location *loc;
3636
3637 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3638 break;
3639 loc = &res->locations[res->nlocations];
3640 p = xdr_inline_decode(xdr, 4);
3641 if (unlikely(!p))
3642 goto out_overflow;
3643 m = be32_to_cpup(p);
3644
3645 dprintk("%s: servers:\n", __func__);
3646 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3647 struct nfs4_string *server;
3648
3649 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3650 unsigned int i;
3651 dprintk("%s: using first %u of %u servers "
3652 "returned for location %u\n",
3653 __func__,
3654 NFS4_FS_LOCATION_MAXSERVERS,
3655 m, res->nlocations);
3656 for (i = loc->nservers; i < m; i++) {
3657 unsigned int len;
3658 char *data;
3659 status = decode_opaque_inline(xdr, &len, &data);
3660 if (unlikely(status != 0))
3661 goto out_eio;
3662 }
3663 break;
3664 }
3665 server = &loc->servers[loc->nservers];
3666 status = decode_opaque_inline(xdr, &server->len, &server->data);
3667 if (unlikely(status != 0))
3668 goto out_eio;
3669 dprintk("%s ", server->data);
3670 }
3671 status = decode_pathname(xdr, &loc->rootpath);
3672 if (unlikely(status != 0))
3673 goto out_eio;
3674 }
3675 if (res->nlocations != 0)
3676 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3677out:
3678 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3679 return status;
3680out_overflow:
3681 print_overflow_msg(__func__, xdr);
3682out_eio:
3683 status = -EIO;
3684 goto out;
3685}
3686
3687static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3688{
3689 __be32 *p;
3690 int status = 0;
3691
3692 *res = 0;
3693 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3694 return -EIO;
3695 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3696 p = xdr_inline_decode(xdr, 8);
3697 if (unlikely(!p))
3698 goto out_overflow;
3699 xdr_decode_hyper(p, res);
3700 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3701 }
3702 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3703 return status;
3704out_overflow:
3705 print_overflow_msg(__func__, xdr);
3706 return -EIO;
3707}
3708
3709static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3710{
3711 __be32 *p;
3712 int status = 0;
3713
3714 *maxlink = 1;
3715 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3716 return -EIO;
3717 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3718 p = xdr_inline_decode(xdr, 4);
3719 if (unlikely(!p))
3720 goto out_overflow;
3721 *maxlink = be32_to_cpup(p);
3722 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3723 }
3724 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3725 return status;
3726out_overflow:
3727 print_overflow_msg(__func__, xdr);
3728 return -EIO;
3729}
3730
3731static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3732{
3733 __be32 *p;
3734 int status = 0;
3735
3736 *maxname = 1024;
3737 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3738 return -EIO;
3739 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3740 p = xdr_inline_decode(xdr, 4);
3741 if (unlikely(!p))
3742 goto out_overflow;
3743 *maxname = be32_to_cpup(p);
3744 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3745 }
3746 dprintk("%s: maxname=%u\n", __func__, *maxname);
3747 return status;
3748out_overflow:
3749 print_overflow_msg(__func__, xdr);
3750 return -EIO;
3751}
3752
3753static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3754{
3755 __be32 *p;
3756 int status = 0;
3757
3758 *res = 1024;
3759 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3760 return -EIO;
3761 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3762 uint64_t maxread;
3763 p = xdr_inline_decode(xdr, 8);
3764 if (unlikely(!p))
3765 goto out_overflow;
3766 xdr_decode_hyper(p, &maxread);
3767 if (maxread > 0x7FFFFFFF)
3768 maxread = 0x7FFFFFFF;
3769 *res = (uint32_t)maxread;
3770 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3771 }
3772 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3773 return status;
3774out_overflow:
3775 print_overflow_msg(__func__, xdr);
3776 return -EIO;
3777}
3778
3779static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3780{
3781 __be32 *p;
3782 int status = 0;
3783
3784 *res = 1024;
3785 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3786 return -EIO;
3787 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3788 uint64_t maxwrite;
3789 p = xdr_inline_decode(xdr, 8);
3790 if (unlikely(!p))
3791 goto out_overflow;
3792 xdr_decode_hyper(p, &maxwrite);
3793 if (maxwrite > 0x7FFFFFFF)
3794 maxwrite = 0x7FFFFFFF;
3795 *res = (uint32_t)maxwrite;
3796 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3797 }
3798 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3799 return status;
3800out_overflow:
3801 print_overflow_msg(__func__, xdr);
3802 return -EIO;
3803}
3804
3805static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3806{
3807 uint32_t tmp;
3808 __be32 *p;
3809 int ret = 0;
3810
3811 *mode = 0;
3812 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3813 return -EIO;
3814 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3815 p = xdr_inline_decode(xdr, 4);
3816 if (unlikely(!p))
3817 goto out_overflow;
3818 tmp = be32_to_cpup(p);
3819 *mode = tmp & ~S_IFMT;
3820 bitmap[1] &= ~FATTR4_WORD1_MODE;
3821 ret = NFS_ATTR_FATTR_MODE;
3822 }
3823 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3824 return ret;
3825out_overflow:
3826 print_overflow_msg(__func__, xdr);
3827 return -EIO;
3828}
3829
3830static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3831{
3832 __be32 *p;
3833 int ret = 0;
3834
3835 *nlink = 1;
3836 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3837 return -EIO;
3838 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3839 p = xdr_inline_decode(xdr, 4);
3840 if (unlikely(!p))
3841 goto out_overflow;
3842 *nlink = be32_to_cpup(p);
3843 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3844 ret = NFS_ATTR_FATTR_NLINK;
3845 }
3846 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3847 return ret;
3848out_overflow:
3849 print_overflow_msg(__func__, xdr);
3850 return -EIO;
3851}
3852
3853static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3854 const struct nfs_server *server, kuid_t *uid,
3855 struct nfs4_string *owner_name)
3856{
3857 uint32_t len;
3858 __be32 *p;
3859 int ret = 0;
3860
3861 *uid = make_kuid(&init_user_ns, -2);
3862 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3863 return -EIO;
3864 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3865 p = xdr_inline_decode(xdr, 4);
3866 if (unlikely(!p))
3867 goto out_overflow;
3868 len = be32_to_cpup(p);
3869 p = xdr_inline_decode(xdr, len);
3870 if (unlikely(!p))
3871 goto out_overflow;
3872 if (owner_name != NULL) {
3873 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3874 if (owner_name->data != NULL) {
3875 owner_name->len = len;
3876 ret = NFS_ATTR_FATTR_OWNER_NAME;
3877 }
3878 } else if (len < XDR_MAX_NETOBJ) {
3879 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3880 ret = NFS_ATTR_FATTR_OWNER;
3881 else
3882 dprintk("%s: nfs_map_name_to_uid failed!\n",
3883 __func__);
3884 } else
3885 dprintk("%s: name too long (%u)!\n",
3886 __func__, len);
3887 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3888 }
3889 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3890 return ret;
3891out_overflow:
3892 print_overflow_msg(__func__, xdr);
3893 return -EIO;
3894}
3895
3896static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3897 const struct nfs_server *server, kgid_t *gid,
3898 struct nfs4_string *group_name)
3899{
3900 uint32_t len;
3901 __be32 *p;
3902 int ret = 0;
3903
3904 *gid = make_kgid(&init_user_ns, -2);
3905 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3906 return -EIO;
3907 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3908 p = xdr_inline_decode(xdr, 4);
3909 if (unlikely(!p))
3910 goto out_overflow;
3911 len = be32_to_cpup(p);
3912 p = xdr_inline_decode(xdr, len);
3913 if (unlikely(!p))
3914 goto out_overflow;
3915 if (group_name != NULL) {
3916 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3917 if (group_name->data != NULL) {
3918 group_name->len = len;
3919 ret = NFS_ATTR_FATTR_GROUP_NAME;
3920 }
3921 } else if (len < XDR_MAX_NETOBJ) {
3922 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3923 ret = NFS_ATTR_FATTR_GROUP;
3924 else
3925 dprintk("%s: nfs_map_group_to_gid failed!\n",
3926 __func__);
3927 } else
3928 dprintk("%s: name too long (%u)!\n",
3929 __func__, len);
3930 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3931 }
3932 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3933 return ret;
3934out_overflow:
3935 print_overflow_msg(__func__, xdr);
3936 return -EIO;
3937}
3938
3939static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3940{
3941 uint32_t major = 0, minor = 0;
3942 __be32 *p;
3943 int ret = 0;
3944
3945 *rdev = MKDEV(0,0);
3946 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3947 return -EIO;
3948 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3949 dev_t tmp;
3950
3951 p = xdr_inline_decode(xdr, 8);
3952 if (unlikely(!p))
3953 goto out_overflow;
3954 major = be32_to_cpup(p++);
3955 minor = be32_to_cpup(p);
3956 tmp = MKDEV(major, minor);
3957 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3958 *rdev = tmp;
3959 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3960 ret = NFS_ATTR_FATTR_RDEV;
3961 }
3962 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3963 return ret;
3964out_overflow:
3965 print_overflow_msg(__func__, xdr);
3966 return -EIO;
3967}
3968
3969static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3970{
3971 __be32 *p;
3972 int status = 0;
3973
3974 *res = 0;
3975 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3976 return -EIO;
3977 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3978 p = xdr_inline_decode(xdr, 8);
3979 if (unlikely(!p))
3980 goto out_overflow;
3981 xdr_decode_hyper(p, res);
3982 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3983 }
3984 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3985 return status;
3986out_overflow:
3987 print_overflow_msg(__func__, xdr);
3988 return -EIO;
3989}
3990
3991static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3992{
3993 __be32 *p;
3994 int status = 0;
3995
3996 *res = 0;
3997 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3998 return -EIO;
3999 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4000 p = xdr_inline_decode(xdr, 8);
4001 if (unlikely(!p))
4002 goto out_overflow;
4003 xdr_decode_hyper(p, res);
4004 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4005 }
4006 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4007 return status;
4008out_overflow:
4009 print_overflow_msg(__func__, xdr);
4010 return -EIO;
4011}
4012
4013static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4014{
4015 __be32 *p;
4016 int status = 0;
4017
4018 *res = 0;
4019 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4020 return -EIO;
4021 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4022 p = xdr_inline_decode(xdr, 8);
4023 if (unlikely(!p))
4024 goto out_overflow;
4025 xdr_decode_hyper(p, res);
4026 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4027 }
4028 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4029 return status;
4030out_overflow:
4031 print_overflow_msg(__func__, xdr);
4032 return -EIO;
4033}
4034
4035static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4036{
4037 __be32 *p;
4038 int ret = 0;
4039
4040 *used = 0;
4041 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4042 return -EIO;
4043 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4044 p = xdr_inline_decode(xdr, 8);
4045 if (unlikely(!p))
4046 goto out_overflow;
4047 xdr_decode_hyper(p, used);
4048 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4049 ret = NFS_ATTR_FATTR_SPACE_USED;
4050 }
4051 dprintk("%s: space used=%Lu\n", __func__,
4052 (unsigned long long)*used);
4053 return ret;
4054out_overflow:
4055 print_overflow_msg(__func__, xdr);
4056 return -EIO;
4057}
4058
4059static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4060{
4061 __be32 *p;
4062 uint64_t sec;
4063 uint32_t nsec;
4064
4065 p = xdr_inline_decode(xdr, 12);
4066 if (unlikely(!p))
4067 goto out_overflow;
4068 p = xdr_decode_hyper(p, &sec);
4069 nsec = be32_to_cpup(p);
4070 time->tv_sec = (time_t)sec;
4071 time->tv_nsec = (long)nsec;
4072 return 0;
4073out_overflow:
4074 print_overflow_msg(__func__, xdr);
4075 return -EIO;
4076}
4077
4078static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4079{
4080 int status = 0;
4081
4082 time->tv_sec = 0;
4083 time->tv_nsec = 0;
4084 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4085 return -EIO;
4086 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4087 status = decode_attr_time(xdr, time);
4088 if (status == 0)
4089 status = NFS_ATTR_FATTR_ATIME;
4090 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4091 }
4092 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4093 return status;
4094}
4095
4096static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097{
4098 int status = 0;
4099
4100 time->tv_sec = 0;
4101 time->tv_nsec = 0;
4102 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4103 return -EIO;
4104 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4105 status = decode_attr_time(xdr, time);
4106 if (status == 0)
4107 status = NFS_ATTR_FATTR_CTIME;
4108 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4109 }
4110 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4111 return status;
4112}
4113
4114static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4115 struct timespec *time)
4116{
4117 int status = 0;
4118
4119 time->tv_sec = 0;
4120 time->tv_nsec = 0;
4121 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4122 return -EIO;
4123 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4124 status = decode_attr_time(xdr, time);
4125 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4126 }
4127 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4128 (long)time->tv_nsec);
4129 return status;
4130}
4131
4132static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4133 struct nfs4_label *label)
4134{
4135 uint32_t pi = 0;
4136 uint32_t lfs = 0;
4137 __u32 len;
4138 __be32 *p;
4139 int status = 0;
4140
4141 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4142 return -EIO;
4143 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4144 p = xdr_inline_decode(xdr, 4);
4145 if (unlikely(!p))
4146 goto out_overflow;
4147 lfs = be32_to_cpup(p++);
4148 p = xdr_inline_decode(xdr, 4);
4149 if (unlikely(!p))
4150 goto out_overflow;
4151 pi = be32_to_cpup(p++);
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 goto out_overflow;
4155 len = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, len);
4157 if (unlikely(!p))
4158 goto out_overflow;
4159 if (len < NFS4_MAXLABELLEN) {
4160 if (label) {
4161 memcpy(label->label, p, len);
4162 label->len = len;
4163 label->pi = pi;
4164 label->lfs = lfs;
4165 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4166 }
4167 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4168 } else
4169 printk(KERN_WARNING "%s: label too long (%u)!\n",
4170 __func__, len);
4171 }
4172 if (label && label->label)
4173 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4174 (char *)label->label, label->len, label->pi, label->lfs);
4175 return status;
4176
4177out_overflow:
4178 print_overflow_msg(__func__, xdr);
4179 return -EIO;
4180}
4181
4182static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4183{
4184 int status = 0;
4185
4186 time->tv_sec = 0;
4187 time->tv_nsec = 0;
4188 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4189 return -EIO;
4190 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4191 status = decode_attr_time(xdr, time);
4192 if (status == 0)
4193 status = NFS_ATTR_FATTR_MTIME;
4194 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4195 }
4196 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4197 return status;
4198}
4199
4200static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4201{
4202 unsigned int attrwords = XDR_QUADLEN(attrlen);
4203 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4204
4205 if (unlikely(attrwords != nwords)) {
4206 dprintk("%s: server returned incorrect attribute length: "
4207 "%u %c %u\n",
4208 __func__,
4209 attrwords << 2,
4210 (attrwords < nwords) ? '<' : '>',
4211 nwords << 2);
4212 return -EIO;
4213 }
4214 return 0;
4215}
4216
4217static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4218{
4219 __be32 *p;
4220
4221 p = xdr_inline_decode(xdr, 20);
4222 if (unlikely(!p))
4223 goto out_overflow;
4224 cinfo->atomic = be32_to_cpup(p++);
4225 p = xdr_decode_hyper(p, &cinfo->before);
4226 xdr_decode_hyper(p, &cinfo->after);
4227 return 0;
4228out_overflow:
4229 print_overflow_msg(__func__, xdr);
4230 return -EIO;
4231}
4232
4233static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4234{
4235 __be32 *p;
4236 uint32_t supp, acc;
4237 int status;
4238
4239 status = decode_op_hdr(xdr, OP_ACCESS);
4240 if (status)
4241 return status;
4242 p = xdr_inline_decode(xdr, 8);
4243 if (unlikely(!p))
4244 goto out_overflow;
4245 supp = be32_to_cpup(p++);
4246 acc = be32_to_cpup(p);
4247 *supported = supp;
4248 *access = acc;
4249 return 0;
4250out_overflow:
4251 print_overflow_msg(__func__, xdr);
4252 return -EIO;
4253}
4254
4255static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4256{
4257 __be32 *p;
4258
4259 p = xdr_inline_decode(xdr, len);
4260 if (likely(p)) {
4261 memcpy(buf, p, len);
4262 return 0;
4263 }
4264 print_overflow_msg(__func__, xdr);
4265 return -EIO;
4266}
4267
4268static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4269{
4270 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4271}
4272
4273static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4274{
4275 int status;
4276
4277 status = decode_op_hdr(xdr, OP_CLOSE);
4278 if (status != -EIO)
4279 nfs_increment_open_seqid(status, res->seqid);
4280 if (!status)
4281 status = decode_stateid(xdr, &res->stateid);
4282 return status;
4283}
4284
4285static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4286{
4287 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4288}
4289
4290static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4291{
4292 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4293}
4294
4295static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4296{
4297 int status;
4298
4299 status = decode_op_hdr(xdr, OP_COMMIT);
4300 if (!status)
4301 status = decode_write_verifier(xdr, &res->verf->verifier);
4302 return status;
4303}
4304
4305static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4306{
4307 __be32 *p;
4308 uint32_t bmlen;
4309 int status;
4310
4311 status = decode_op_hdr(xdr, OP_CREATE);
4312 if (status)
4313 return status;
4314 if ((status = decode_change_info(xdr, cinfo)))
4315 return status;
4316 p = xdr_inline_decode(xdr, 4);
4317 if (unlikely(!p))
4318 goto out_overflow;
4319 bmlen = be32_to_cpup(p);
4320 p = xdr_inline_decode(xdr, bmlen << 2);
4321 if (likely(p))
4322 return 0;
4323out_overflow:
4324 print_overflow_msg(__func__, xdr);
4325 return -EIO;
4326}
4327
4328static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4329{
4330 unsigned int savep;
4331 uint32_t attrlen, bitmap[3] = {0};
4332 int status;
4333
4334 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4335 goto xdr_error;
4336 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4337 goto xdr_error;
4338 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4339 goto xdr_error;
4340 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4341 goto xdr_error;
4342 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4343 &res->fh_expire_type)) != 0)
4344 goto xdr_error;
4345 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4346 goto xdr_error;
4347 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4348 goto xdr_error;
4349 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4350 goto xdr_error;
4351 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4352 res->exclcreat_bitmask)) != 0)
4353 goto xdr_error;
4354 status = verify_attr_len(xdr, savep, attrlen);
4355xdr_error:
4356 dprintk("%s: xdr returned %d!\n", __func__, -status);
4357 return status;
4358}
4359
4360static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4361{
4362 unsigned int savep;
4363 uint32_t attrlen, bitmap[3] = {0};
4364 int status;
4365
4366 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4369 goto xdr_error;
4370 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4371 goto xdr_error;
4372
4373 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4374 goto xdr_error;
4375 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4376 goto xdr_error;
4377 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4378 goto xdr_error;
4379
4380 status = -EIO;
4381 if (unlikely(bitmap[0]))
4382 goto xdr_error;
4383
4384 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4389 goto xdr_error;
4390
4391 status = verify_attr_len(xdr, savep, attrlen);
4392xdr_error:
4393 dprintk("%s: xdr returned %d!\n", __func__, -status);
4394 return status;
4395}
4396
4397static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4398{
4399 unsigned int savep;
4400 uint32_t attrlen, bitmap[3] = {0};
4401 int status;
4402
4403 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4404 goto xdr_error;
4405 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4406 goto xdr_error;
4407 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4408 goto xdr_error;
4409
4410 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4411 goto xdr_error;
4412 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4413 goto xdr_error;
4414
4415 status = verify_attr_len(xdr, savep, attrlen);
4416xdr_error:
4417 dprintk("%s: xdr returned %d!\n", __func__, -status);
4418 return status;
4419}
4420
4421static int decode_threshold_hint(struct xdr_stream *xdr,
4422 uint32_t *bitmap,
4423 uint64_t *res,
4424 uint32_t hint_bit)
4425{
4426 __be32 *p;
4427
4428 *res = 0;
4429 if (likely(bitmap[0] & hint_bit)) {
4430 p = xdr_inline_decode(xdr, 8);
4431 if (unlikely(!p))
4432 goto out_overflow;
4433 xdr_decode_hyper(p, res);
4434 }
4435 return 0;
4436out_overflow:
4437 print_overflow_msg(__func__, xdr);
4438 return -EIO;
4439}
4440
4441static int decode_first_threshold_item4(struct xdr_stream *xdr,
4442 struct nfs4_threshold *res)
4443{
4444 __be32 *p;
4445 unsigned int savep;
4446 uint32_t bitmap[3] = {0,}, attrlen;
4447 int status;
4448
4449 /* layout type */
4450 p = xdr_inline_decode(xdr, 4);
4451 if (unlikely(!p)) {
4452 print_overflow_msg(__func__, xdr);
4453 return -EIO;
4454 }
4455 res->l_type = be32_to_cpup(p);
4456
4457 /* thi_hintset bitmap */
4458 status = decode_attr_bitmap(xdr, bitmap);
4459 if (status < 0)
4460 goto xdr_error;
4461
4462 /* thi_hintlist length */
4463 status = decode_attr_length(xdr, &attrlen, &savep);
4464 if (status < 0)
4465 goto xdr_error;
4466 /* thi_hintlist */
4467 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4468 if (status < 0)
4469 goto xdr_error;
4470 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4471 if (status < 0)
4472 goto xdr_error;
4473 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4474 THRESHOLD_RD_IO);
4475 if (status < 0)
4476 goto xdr_error;
4477 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4478 THRESHOLD_WR_IO);
4479 if (status < 0)
4480 goto xdr_error;
4481
4482 status = verify_attr_len(xdr, savep, attrlen);
4483 res->bm = bitmap[0];
4484
4485 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4486 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4487 res->wr_io_sz);
4488xdr_error:
4489 dprintk("%s ret=%d!\n", __func__, status);
4490 return status;
4491}
4492
4493/*
4494 * Thresholds on pNFS direct I/O vrs MDS I/O
4495 */
4496static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4497 uint32_t *bitmap,
4498 struct nfs4_threshold *res)
4499{
4500 __be32 *p;
4501 int status = 0;
4502 uint32_t num;
4503
4504 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4505 return -EIO;
4506 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4507 /* Did the server return an unrequested attribute? */
4508 if (unlikely(res == NULL))
4509 return -EREMOTEIO;
4510 p = xdr_inline_decode(xdr, 4);
4511 if (unlikely(!p))
4512 goto out_overflow;
4513 num = be32_to_cpup(p);
4514 if (num == 0)
4515 return 0;
4516 if (num > 1)
4517 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4518 "drivers per filesystem not supported\n",
4519 __func__);
4520
4521 status = decode_first_threshold_item4(xdr, res);
4522 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4523 }
4524 return status;
4525out_overflow:
4526 print_overflow_msg(__func__, xdr);
4527 return -EIO;
4528}
4529
4530static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4531 struct nfs_fattr *fattr, struct nfs_fh *fh,
4532 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4533 const struct nfs_server *server)
4534{
4535 int status;
4536 umode_t fmode = 0;
4537 uint32_t type;
4538 int32_t err;
4539
4540 status = decode_attr_type(xdr, bitmap, &type);
4541 if (status < 0)
4542 goto xdr_error;
4543 fattr->mode = 0;
4544 if (status != 0) {
4545 fattr->mode |= nfs_type2fmt[type];
4546 fattr->valid |= status;
4547 }
4548
4549 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4550 if (status < 0)
4551 goto xdr_error;
4552 fattr->valid |= status;
4553
4554 status = decode_attr_size(xdr, bitmap, &fattr->size);
4555 if (status < 0)
4556 goto xdr_error;
4557 fattr->valid |= status;
4558
4559 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4560 if (status < 0)
4561 goto xdr_error;
4562 fattr->valid |= status;
4563
4564 err = 0;
4565 status = decode_attr_error(xdr, bitmap, &err);
4566 if (status < 0)
4567 goto xdr_error;
4568
4569 status = decode_attr_filehandle(xdr, bitmap, fh);
4570 if (status < 0)
4571 goto xdr_error;
4572
4573 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4579 if (status < 0)
4580 goto xdr_error;
4581 fattr->valid |= status;
4582
4583 status = -EIO;
4584 if (unlikely(bitmap[0]))
4585 goto xdr_error;
4586
4587 status = decode_attr_mode(xdr, bitmap, &fmode);
4588 if (status < 0)
4589 goto xdr_error;
4590 if (status != 0) {
4591 fattr->mode |= fmode;
4592 fattr->valid |= status;
4593 }
4594
4595 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4596 if (status < 0)
4597 goto xdr_error;
4598 fattr->valid |= status;
4599
4600 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4601 if (status < 0)
4602 goto xdr_error;
4603 fattr->valid |= status;
4604
4605 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4606 if (status < 0)
4607 goto xdr_error;
4608 fattr->valid |= status;
4609
4610 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4611 if (status < 0)
4612 goto xdr_error;
4613 fattr->valid |= status;
4614
4615 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4616 if (status < 0)
4617 goto xdr_error;
4618 fattr->valid |= status;
4619
4620 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4621 if (status < 0)
4622 goto xdr_error;
4623 fattr->valid |= status;
4624
4625 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4626 if (status < 0)
4627 goto xdr_error;
4628 fattr->valid |= status;
4629
4630 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4631 if (status < 0)
4632 goto xdr_error;
4633 fattr->valid |= status;
4634
4635 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4636 if (status < 0)
4637 goto xdr_error;
4638 fattr->valid |= status;
4639
4640 status = -EIO;
4641 if (unlikely(bitmap[1]))
4642 goto xdr_error;
4643
4644 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4645 if (status < 0)
4646 goto xdr_error;
4647
4648 if (label) {
4649 status = decode_attr_security_label(xdr, bitmap, label);
4650 if (status < 0)
4651 goto xdr_error;
4652 fattr->valid |= status;
4653 }
4654
4655xdr_error:
4656 dprintk("%s: xdr returned %d\n", __func__, -status);
4657 return status;
4658}
4659
4660static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4661 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4662 struct nfs4_label *label, const struct nfs_server *server)
4663{
4664 unsigned int savep;
4665 uint32_t attrlen,
4666 bitmap[3] = {0};
4667 int status;
4668
4669 status = decode_op_hdr(xdr, OP_GETATTR);
4670 if (status < 0)
4671 goto xdr_error;
4672
4673 status = decode_attr_bitmap(xdr, bitmap);
4674 if (status < 0)
4675 goto xdr_error;
4676
4677 status = decode_attr_length(xdr, &attrlen, &savep);
4678 if (status < 0)
4679 goto xdr_error;
4680
4681 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4682 label, server);
4683 if (status < 0)
4684 goto xdr_error;
4685
4686 status = verify_attr_len(xdr, savep, attrlen);
4687xdr_error:
4688 dprintk("%s: xdr returned %d\n", __func__, -status);
4689 return status;
4690}
4691
4692static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4693 struct nfs4_label *label, const struct nfs_server *server)
4694{
4695 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4696}
4697
4698static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4699 const struct nfs_server *server)
4700{
4701 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4702}
4703
4704/*
4705 * Decode potentially multiple layout types. Currently we only support
4706 * one layout driver per file system.
4707 */
4708static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4709 uint32_t *layouttype)
4710{
4711 __be32 *p;
4712 int num;
4713
4714 p = xdr_inline_decode(xdr, 4);
4715 if (unlikely(!p))
4716 goto out_overflow;
4717 num = be32_to_cpup(p);
4718
4719 /* pNFS is not supported by the underlying file system */
4720 if (num == 0) {
4721 *layouttype = 0;
4722 return 0;
4723 }
4724 if (num > 1)
4725 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4726 "drivers per filesystem not supported\n", __func__);
4727
4728 /* Decode and set first layout type, move xdr->p past unused types */
4729 p = xdr_inline_decode(xdr, num * 4);
4730 if (unlikely(!p))
4731 goto out_overflow;
4732 *layouttype = be32_to_cpup(p);
4733 return 0;
4734out_overflow:
4735 print_overflow_msg(__func__, xdr);
4736 return -EIO;
4737}
4738
4739/*
4740 * The type of file system exported.
4741 * Note we must ensure that layouttype is set in any non-error case.
4742 */
4743static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4744 uint32_t *layouttype)
4745{
4746 int status = 0;
4747
4748 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4749 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4750 return -EIO;
4751 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4752 status = decode_first_pnfs_layout_type(xdr, layouttype);
4753 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4754 } else
4755 *layouttype = 0;
4756 return status;
4757}
4758
4759/*
4760 * The prefered block size for layout directed io
4761 */
4762static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4763 uint32_t *res)
4764{
4765 __be32 *p;
4766
4767 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4768 *res = 0;
4769 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4770 p = xdr_inline_decode(xdr, 4);
4771 if (unlikely(!p)) {
4772 print_overflow_msg(__func__, xdr);
4773 return -EIO;
4774 }
4775 *res = be32_to_cpup(p);
4776 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4777 }
4778 return 0;
4779}
4780
4781/*
4782 * The granularity of a CLONE operation.
4783 */
4784static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4785 uint32_t *res)
4786{
4787 __be32 *p;
4788
4789 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4790 *res = 0;
4791 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4792 p = xdr_inline_decode(xdr, 4);
4793 if (unlikely(!p)) {
4794 print_overflow_msg(__func__, xdr);
4795 return -EIO;
4796 }
4797 *res = be32_to_cpup(p);
4798 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4799 }
4800 return 0;
4801}
4802
4803static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4804{
4805 unsigned int savep;
4806 uint32_t attrlen, bitmap[3];
4807 int status;
4808
4809 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4810 goto xdr_error;
4811 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4812 goto xdr_error;
4813 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4814 goto xdr_error;
4815
4816 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4817
4818 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4819 goto xdr_error;
4820 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4821 goto xdr_error;
4822 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4823 goto xdr_error;
4824 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4825 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4826 goto xdr_error;
4827 fsinfo->wtpref = fsinfo->wtmax;
4828
4829 status = -EIO;
4830 if (unlikely(bitmap[0]))
4831 goto xdr_error;
4832
4833 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4834 if (status != 0)
4835 goto xdr_error;
4836 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4837 if (status != 0)
4838 goto xdr_error;
4839
4840 status = -EIO;
4841 if (unlikely(bitmap[1]))
4842 goto xdr_error;
4843
4844 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4845 if (status)
4846 goto xdr_error;
4847 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4848 if (status)
4849 goto xdr_error;
4850
4851 status = verify_attr_len(xdr, savep, attrlen);
4852xdr_error:
4853 dprintk("%s: xdr returned %d!\n", __func__, -status);
4854 return status;
4855}
4856
4857static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4858{
4859 __be32 *p;
4860 uint32_t len;
4861 int status;
4862
4863 /* Zero handle first to allow comparisons */
4864 memset(fh, 0, sizeof(*fh));
4865
4866 status = decode_op_hdr(xdr, OP_GETFH);
4867 if (status)
4868 return status;
4869
4870 p = xdr_inline_decode(xdr, 4);
4871 if (unlikely(!p))
4872 goto out_overflow;
4873 len = be32_to_cpup(p);
4874 if (len > NFS4_FHSIZE)
4875 return -EIO;
4876 fh->size = len;
4877 p = xdr_inline_decode(xdr, len);
4878 if (unlikely(!p))
4879 goto out_overflow;
4880 memcpy(fh->data, p, len);
4881 return 0;
4882out_overflow:
4883 print_overflow_msg(__func__, xdr);
4884 return -EIO;
4885}
4886
4887static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4888{
4889 int status;
4890
4891 status = decode_op_hdr(xdr, OP_LINK);
4892 if (status)
4893 return status;
4894 return decode_change_info(xdr, cinfo);
4895}
4896
4897/*
4898 * We create the owner, so we know a proper owner.id length is 4.
4899 */
4900static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4901{
4902 uint64_t offset, length, clientid;
4903 __be32 *p;
4904 uint32_t namelen, type;
4905
4906 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4907 if (unlikely(!p))
4908 goto out_overflow;
4909 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4910 p = xdr_decode_hyper(p, &length);
4911 type = be32_to_cpup(p++); /* 4 byte read */
4912 if (fl != NULL) { /* manipulate file lock */
4913 fl->fl_start = (loff_t)offset;
4914 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4915 if (length == ~(uint64_t)0)
4916 fl->fl_end = OFFSET_MAX;
4917 fl->fl_type = F_WRLCK;
4918 if (type & 1)
4919 fl->fl_type = F_RDLCK;
4920 fl->fl_pid = 0;
4921 }
4922 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4923 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4924 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4925 if (likely(p))
4926 return -NFS4ERR_DENIED;
4927out_overflow:
4928 print_overflow_msg(__func__, xdr);
4929 return -EIO;
4930}
4931
4932static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4933{
4934 int status;
4935
4936 status = decode_op_hdr(xdr, OP_LOCK);
4937 if (status == -EIO)
4938 goto out;
4939 if (status == 0) {
4940 status = decode_stateid(xdr, &res->stateid);
4941 if (unlikely(status))
4942 goto out;
4943 } else if (status == -NFS4ERR_DENIED)
4944 status = decode_lock_denied(xdr, NULL);
4945 if (res->open_seqid != NULL)
4946 nfs_increment_open_seqid(status, res->open_seqid);
4947 nfs_increment_lock_seqid(status, res->lock_seqid);
4948out:
4949 return status;
4950}
4951
4952static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4953{
4954 int status;
4955 status = decode_op_hdr(xdr, OP_LOCKT);
4956 if (status == -NFS4ERR_DENIED)
4957 return decode_lock_denied(xdr, res->denied);
4958 return status;
4959}
4960
4961static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4962{
4963 int status;
4964
4965 status = decode_op_hdr(xdr, OP_LOCKU);
4966 if (status != -EIO)
4967 nfs_increment_lock_seqid(status, res->seqid);
4968 if (status == 0)
4969 status = decode_stateid(xdr, &res->stateid);
4970 return status;
4971}
4972
4973static int decode_release_lockowner(struct xdr_stream *xdr)
4974{
4975 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4976}
4977
4978static int decode_lookup(struct xdr_stream *xdr)
4979{
4980 return decode_op_hdr(xdr, OP_LOOKUP);
4981}
4982
4983/* This is too sick! */
4984static int decode_space_limit(struct xdr_stream *xdr,
4985 unsigned long *pagemod_limit)
4986{
4987 __be32 *p;
4988 uint32_t limit_type, nblocks, blocksize;
4989 u64 maxsize = 0;
4990
4991 p = xdr_inline_decode(xdr, 12);
4992 if (unlikely(!p))
4993 goto out_overflow;
4994 limit_type = be32_to_cpup(p++);
4995 switch (limit_type) {
4996 case NFS4_LIMIT_SIZE:
4997 xdr_decode_hyper(p, &maxsize);
4998 break;
4999 case NFS4_LIMIT_BLOCKS:
5000 nblocks = be32_to_cpup(p++);
5001 blocksize = be32_to_cpup(p);
5002 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5003 }
5004 maxsize >>= PAGE_SHIFT;
5005 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5006 return 0;
5007out_overflow:
5008 print_overflow_msg(__func__, xdr);
5009 return -EIO;
5010}
5011
5012static int decode_rw_delegation(struct xdr_stream *xdr,
5013 uint32_t delegation_type,
5014 struct nfs_openres *res)
5015{
5016 __be32 *p;
5017 int status;
5018
5019 status = decode_stateid(xdr, &res->delegation);
5020 if (unlikely(status))
5021 return status;
5022 p = xdr_inline_decode(xdr, 4);
5023 if (unlikely(!p))
5024 goto out_overflow;
5025 res->do_recall = be32_to_cpup(p);
5026
5027 switch (delegation_type) {
5028 case NFS4_OPEN_DELEGATE_READ:
5029 res->delegation_type = FMODE_READ;
5030 break;
5031 case NFS4_OPEN_DELEGATE_WRITE:
5032 res->delegation_type = FMODE_WRITE|FMODE_READ;
5033 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5034 return -EIO;
5035 }
5036 return decode_ace(xdr, NULL, res->server->nfs_client);
5037out_overflow:
5038 print_overflow_msg(__func__, xdr);
5039 return -EIO;
5040}
5041
5042static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5043{
5044 __be32 *p;
5045 uint32_t why_no_delegation;
5046
5047 p = xdr_inline_decode(xdr, 4);
5048 if (unlikely(!p))
5049 goto out_overflow;
5050 why_no_delegation = be32_to_cpup(p);
5051 switch (why_no_delegation) {
5052 case WND4_CONTENTION:
5053 case WND4_RESOURCE:
5054 xdr_inline_decode(xdr, 4);
5055 /* Ignore for now */
5056 }
5057 return 0;
5058out_overflow:
5059 print_overflow_msg(__func__, xdr);
5060 return -EIO;
5061}
5062
5063static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5064{
5065 __be32 *p;
5066 uint32_t delegation_type;
5067
5068 p = xdr_inline_decode(xdr, 4);
5069 if (unlikely(!p))
5070 goto out_overflow;
5071 delegation_type = be32_to_cpup(p);
5072 res->delegation_type = 0;
5073 switch (delegation_type) {
5074 case NFS4_OPEN_DELEGATE_NONE:
5075 return 0;
5076 case NFS4_OPEN_DELEGATE_READ:
5077 case NFS4_OPEN_DELEGATE_WRITE:
5078 return decode_rw_delegation(xdr, delegation_type, res);
5079 case NFS4_OPEN_DELEGATE_NONE_EXT:
5080 return decode_no_delegation(xdr, res);
5081 }
5082 return -EIO;
5083out_overflow:
5084 print_overflow_msg(__func__, xdr);
5085 return -EIO;
5086}
5087
5088static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5089{
5090 __be32 *p;
5091 uint32_t savewords, bmlen, i;
5092 int status;
5093
5094 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5095 return status;
5096 nfs_increment_open_seqid(status, res->seqid);
5097 if (status)
5098 return status;
5099 status = decode_stateid(xdr, &res->stateid);
5100 if (unlikely(status))
5101 return status;
5102
5103 decode_change_info(xdr, &res->cinfo);
5104
5105 p = xdr_inline_decode(xdr, 8);
5106 if (unlikely(!p))
5107 goto out_overflow;
5108 res->rflags = be32_to_cpup(p++);
5109 bmlen = be32_to_cpup(p);
5110 if (bmlen > 10)
5111 goto xdr_error;
5112
5113 p = xdr_inline_decode(xdr, bmlen << 2);
5114 if (unlikely(!p))
5115 goto out_overflow;
5116 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5117 for (i = 0; i < savewords; ++i)
5118 res->attrset[i] = be32_to_cpup(p++);
5119 for (; i < NFS4_BITMAP_SIZE; i++)
5120 res->attrset[i] = 0;
5121
5122 return decode_delegation(xdr, res);
5123xdr_error:
5124 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5125 return -EIO;
5126out_overflow:
5127 print_overflow_msg(__func__, xdr);
5128 return -EIO;
5129}
5130
5131static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5132{
5133 int status;
5134
5135 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5136 if (status != -EIO)
5137 nfs_increment_open_seqid(status, res->seqid);
5138 if (!status)
5139 status = decode_stateid(xdr, &res->stateid);
5140 return status;
5141}
5142
5143static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5144{
5145 int status;
5146
5147 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5148 if (status != -EIO)
5149 nfs_increment_open_seqid(status, res->seqid);
5150 if (!status)
5151 status = decode_stateid(xdr, &res->stateid);
5152 return status;
5153}
5154
5155static int decode_putfh(struct xdr_stream *xdr)
5156{
5157 return decode_op_hdr(xdr, OP_PUTFH);
5158}
5159
5160static int decode_putrootfh(struct xdr_stream *xdr)
5161{
5162 return decode_op_hdr(xdr, OP_PUTROOTFH);
5163}
5164
5165static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5166 struct nfs_pgio_res *res)
5167{
5168 __be32 *p;
5169 uint32_t count, eof, recvd;
5170 int status;
5171
5172 status = decode_op_hdr(xdr, OP_READ);
5173 if (status)
5174 return status;
5175 p = xdr_inline_decode(xdr, 8);
5176 if (unlikely(!p))
5177 goto out_overflow;
5178 eof = be32_to_cpup(p++);
5179 count = be32_to_cpup(p);
5180 recvd = xdr_read_pages(xdr, count);
5181 if (count > recvd) {
5182 dprintk("NFS: server cheating in read reply: "
5183 "count %u > recvd %u\n", count, recvd);
5184 count = recvd;
5185 eof = 0;
5186 }
5187 res->eof = eof;
5188 res->count = count;
5189 return 0;
5190out_overflow:
5191 print_overflow_msg(__func__, xdr);
5192 return -EIO;
5193}
5194
5195static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5196{
5197 int status;
5198 __be32 verf[2];
5199
5200 status = decode_op_hdr(xdr, OP_READDIR);
5201 if (!status)
5202 status = decode_verifier(xdr, readdir->verifier.data);
5203 if (unlikely(status))
5204 return status;
5205 memcpy(verf, readdir->verifier.data, sizeof(verf));
5206 dprintk("%s: verifier = %08x:%08x\n",
5207 __func__, verf[0], verf[1]);
5208 return xdr_read_pages(xdr, xdr->buf->page_len);
5209}
5210
5211static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5212{
5213 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5214 u32 len, recvd;
5215 __be32 *p;
5216 int status;
5217
5218 status = decode_op_hdr(xdr, OP_READLINK);
5219 if (status)
5220 return status;
5221
5222 /* Convert length of symlink */
5223 p = xdr_inline_decode(xdr, 4);
5224 if (unlikely(!p))
5225 goto out_overflow;
5226 len = be32_to_cpup(p);
5227 if (len >= rcvbuf->page_len || len <= 0) {
5228 dprintk("nfs: server returned giant symlink!\n");
5229 return -ENAMETOOLONG;
5230 }
5231 recvd = xdr_read_pages(xdr, len);
5232 if (recvd < len) {
5233 dprintk("NFS: server cheating in readlink reply: "
5234 "count %u > recvd %u\n", len, recvd);
5235 return -EIO;
5236 }
5237 /*
5238 * The XDR encode routine has set things up so that
5239 * the link text will be copied directly into the
5240 * buffer. We just have to do overflow-checking,
5241 * and and null-terminate the text (the VFS expects
5242 * null-termination).
5243 */
5244 xdr_terminate_string(rcvbuf, len);
5245 return 0;
5246out_overflow:
5247 print_overflow_msg(__func__, xdr);
5248 return -EIO;
5249}
5250
5251static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5252{
5253 int status;
5254
5255 status = decode_op_hdr(xdr, OP_REMOVE);
5256 if (status)
5257 goto out;
5258 status = decode_change_info(xdr, cinfo);
5259out:
5260 return status;
5261}
5262
5263static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5264 struct nfs4_change_info *new_cinfo)
5265{
5266 int status;
5267
5268 status = decode_op_hdr(xdr, OP_RENAME);
5269 if (status)
5270 goto out;
5271 if ((status = decode_change_info(xdr, old_cinfo)))
5272 goto out;
5273 status = decode_change_info(xdr, new_cinfo);
5274out:
5275 return status;
5276}
5277
5278static int decode_renew(struct xdr_stream *xdr)
5279{
5280 return decode_op_hdr(xdr, OP_RENEW);
5281}
5282
5283static int
5284decode_restorefh(struct xdr_stream *xdr)
5285{
5286 return decode_op_hdr(xdr, OP_RESTOREFH);
5287}
5288
5289static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5290 struct nfs_getaclres *res)
5291{
5292 unsigned int savep;
5293 uint32_t attrlen,
5294 bitmap[3] = {0};
5295 int status;
5296 unsigned int pg_offset;
5297
5298 res->acl_len = 0;
5299 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5300 goto out;
5301
5302 xdr_enter_page(xdr, xdr->buf->page_len);
5303
5304 /* Calculate the offset of the page data */
5305 pg_offset = xdr->buf->head[0].iov_len;
5306
5307 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5308 goto out;
5309 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5310 goto out;
5311
5312 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5313 return -EIO;
5314 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5315
5316 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5317 * are stored with the acl data to handle the problem of
5318 * variable length bitmaps.*/
5319 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5320 res->acl_len = attrlen;
5321
5322 /* Check for receive buffer overflow */
5323 if (res->acl_len > (xdr->nwords << 2) ||
5324 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5325 res->acl_flags |= NFS4_ACL_TRUNC;
5326 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5327 attrlen, xdr->nwords << 2);
5328 }
5329 } else
5330 status = -EOPNOTSUPP;
5331
5332out:
5333 return status;
5334}
5335
5336static int
5337decode_savefh(struct xdr_stream *xdr)
5338{
5339 return decode_op_hdr(xdr, OP_SAVEFH);
5340}
5341
5342static int decode_setattr(struct xdr_stream *xdr)
5343{
5344 __be32 *p;
5345 uint32_t bmlen;
5346 int status;
5347
5348 status = decode_op_hdr(xdr, OP_SETATTR);
5349 if (status)
5350 return status;
5351 p = xdr_inline_decode(xdr, 4);
5352 if (unlikely(!p))
5353 goto out_overflow;
5354 bmlen = be32_to_cpup(p);
5355 p = xdr_inline_decode(xdr, bmlen << 2);
5356 if (likely(p))
5357 return 0;
5358out_overflow:
5359 print_overflow_msg(__func__, xdr);
5360 return -EIO;
5361}
5362
5363static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5364{
5365 __be32 *p;
5366 uint32_t opnum;
5367 int32_t nfserr;
5368
5369 p = xdr_inline_decode(xdr, 8);
5370 if (unlikely(!p))
5371 goto out_overflow;
5372 opnum = be32_to_cpup(p++);
5373 if (opnum != OP_SETCLIENTID) {
5374 dprintk("nfs: decode_setclientid: Server returned operation"
5375 " %d\n", opnum);
5376 return -EIO;
5377 }
5378 nfserr = be32_to_cpup(p);
5379 if (nfserr == NFS_OK) {
5380 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5381 if (unlikely(!p))
5382 goto out_overflow;
5383 p = xdr_decode_hyper(p, &res->clientid);
5384 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5385 } else if (nfserr == NFSERR_CLID_INUSE) {
5386 uint32_t len;
5387
5388 /* skip netid string */
5389 p = xdr_inline_decode(xdr, 4);
5390 if (unlikely(!p))
5391 goto out_overflow;
5392 len = be32_to_cpup(p);
5393 p = xdr_inline_decode(xdr, len);
5394 if (unlikely(!p))
5395 goto out_overflow;
5396
5397 /* skip uaddr string */
5398 p = xdr_inline_decode(xdr, 4);
5399 if (unlikely(!p))
5400 goto out_overflow;
5401 len = be32_to_cpup(p);
5402 p = xdr_inline_decode(xdr, len);
5403 if (unlikely(!p))
5404 goto out_overflow;
5405 return -NFSERR_CLID_INUSE;
5406 } else
5407 return nfs4_stat_to_errno(nfserr);
5408
5409 return 0;
5410out_overflow:
5411 print_overflow_msg(__func__, xdr);
5412 return -EIO;
5413}
5414
5415static int decode_setclientid_confirm(struct xdr_stream *xdr)
5416{
5417 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5418}
5419
5420static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5421{
5422 __be32 *p;
5423 int status;
5424
5425 status = decode_op_hdr(xdr, OP_WRITE);
5426 if (status)
5427 return status;
5428
5429 p = xdr_inline_decode(xdr, 8);
5430 if (unlikely(!p))
5431 goto out_overflow;
5432 res->count = be32_to_cpup(p++);
5433 res->verf->committed = be32_to_cpup(p++);
5434 return decode_write_verifier(xdr, &res->verf->verifier);
5435out_overflow:
5436 print_overflow_msg(__func__, xdr);
5437 return -EIO;
5438}
5439
5440static int decode_delegreturn(struct xdr_stream *xdr)
5441{
5442 return decode_op_hdr(xdr, OP_DELEGRETURN);
5443}
5444
5445static int decode_secinfo_gss(struct xdr_stream *xdr,
5446 struct nfs4_secinfo4 *flavor)
5447{
5448 u32 oid_len;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 goto out_overflow;
5454 oid_len = be32_to_cpup(p);
5455 if (oid_len > GSS_OID_MAX_LEN)
5456 goto out_err;
5457
5458 p = xdr_inline_decode(xdr, oid_len);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5462 flavor->flavor_info.oid.len = oid_len;
5463
5464 p = xdr_inline_decode(xdr, 8);
5465 if (unlikely(!p))
5466 goto out_overflow;
5467 flavor->flavor_info.qop = be32_to_cpup(p++);
5468 flavor->flavor_info.service = be32_to_cpup(p);
5469
5470 return 0;
5471
5472out_overflow:
5473 print_overflow_msg(__func__, xdr);
5474 return -EIO;
5475out_err:
5476 return -EINVAL;
5477}
5478
5479static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5480{
5481 struct nfs4_secinfo4 *sec_flavor;
5482 unsigned int i, num_flavors;
5483 int status;
5484 __be32 *p;
5485
5486 p = xdr_inline_decode(xdr, 4);
5487 if (unlikely(!p))
5488 goto out_overflow;
5489
5490 res->flavors->num_flavors = 0;
5491 num_flavors = be32_to_cpup(p);
5492
5493 for (i = 0; i < num_flavors; i++) {
5494 sec_flavor = &res->flavors->flavors[i];
5495 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5496 break;
5497
5498 p = xdr_inline_decode(xdr, 4);
5499 if (unlikely(!p))
5500 goto out_overflow;
5501 sec_flavor->flavor = be32_to_cpup(p);
5502
5503 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5504 status = decode_secinfo_gss(xdr, sec_flavor);
5505 if (status)
5506 goto out;
5507 }
5508 res->flavors->num_flavors++;
5509 }
5510
5511 status = 0;
5512out:
5513 return status;
5514out_overflow:
5515 print_overflow_msg(__func__, xdr);
5516 return -EIO;
5517}
5518
5519static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520{
5521 int status = decode_op_hdr(xdr, OP_SECINFO);
5522 if (status)
5523 return status;
5524 return decode_secinfo_common(xdr, res);
5525}
5526
5527#if defined(CONFIG_NFS_V4_1)
5528static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5529{
5530 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5531 if (status)
5532 return status;
5533 return decode_secinfo_common(xdr, res);
5534}
5535
5536static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5537{
5538 __be32 *p;
5539 uint32_t bitmap_words;
5540 unsigned int i;
5541
5542 p = xdr_inline_decode(xdr, 4);
5543 bitmap_words = be32_to_cpup(p++);
5544 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5545 return -EIO;
5546 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5547 for (i = 0; i < bitmap_words; i++)
5548 op_map->u.words[i] = be32_to_cpup(p++);
5549
5550 return 0;
5551}
5552
5553static int decode_exchange_id(struct xdr_stream *xdr,
5554 struct nfs41_exchange_id_res *res)
5555{
5556 __be32 *p;
5557 uint32_t dummy;
5558 char *dummy_str;
5559 int status;
5560 uint32_t impl_id_count;
5561
5562 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5563 if (status)
5564 return status;
5565
5566 p = xdr_inline_decode(xdr, 8);
5567 if (unlikely(!p))
5568 goto out_overflow;
5569 xdr_decode_hyper(p, &res->clientid);
5570 p = xdr_inline_decode(xdr, 12);
5571 if (unlikely(!p))
5572 goto out_overflow;
5573 res->seqid = be32_to_cpup(p++);
5574 res->flags = be32_to_cpup(p++);
5575
5576 res->state_protect.how = be32_to_cpup(p);
5577 switch (res->state_protect.how) {
5578 case SP4_NONE:
5579 break;
5580 case SP4_MACH_CRED:
5581 status = decode_op_map(xdr, &res->state_protect.enforce);
5582 if (status)
5583 return status;
5584 status = decode_op_map(xdr, &res->state_protect.allow);
5585 if (status)
5586 return status;
5587 break;
5588 default:
5589 WARN_ON_ONCE(1);
5590 return -EIO;
5591 }
5592
5593 /* server_owner4.so_minor_id */
5594 p = xdr_inline_decode(xdr, 8);
5595 if (unlikely(!p))
5596 goto out_overflow;
5597 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5598
5599 /* server_owner4.so_major_id */
5600 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5601 if (unlikely(status))
5602 return status;
5603 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5604 return -EIO;
5605 memcpy(res->server_owner->major_id, dummy_str, dummy);
5606 res->server_owner->major_id_sz = dummy;
5607
5608 /* server_scope4 */
5609 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5610 if (unlikely(status))
5611 return status;
5612 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5613 return -EIO;
5614 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5615 res->server_scope->server_scope_sz = dummy;
5616
5617 /* Implementation Id */
5618 p = xdr_inline_decode(xdr, 4);
5619 if (unlikely(!p))
5620 goto out_overflow;
5621 impl_id_count = be32_to_cpup(p++);
5622
5623 if (impl_id_count) {
5624 /* nii_domain */
5625 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5626 if (unlikely(status))
5627 return status;
5628 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5629 return -EIO;
5630 memcpy(res->impl_id->domain, dummy_str, dummy);
5631
5632 /* nii_name */
5633 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5634 if (unlikely(status))
5635 return status;
5636 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5637 return -EIO;
5638 memcpy(res->impl_id->name, dummy_str, dummy);
5639
5640 /* nii_date */
5641 p = xdr_inline_decode(xdr, 12);
5642 if (unlikely(!p))
5643 goto out_overflow;
5644 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5645 res->impl_id->date.nseconds = be32_to_cpup(p);
5646
5647 /* if there's more than one entry, ignore the rest */
5648 }
5649 return 0;
5650out_overflow:
5651 print_overflow_msg(__func__, xdr);
5652 return -EIO;
5653}
5654
5655static int decode_chan_attrs(struct xdr_stream *xdr,
5656 struct nfs4_channel_attrs *attrs)
5657{
5658 __be32 *p;
5659 u32 nr_attrs, val;
5660
5661 p = xdr_inline_decode(xdr, 28);
5662 if (unlikely(!p))
5663 goto out_overflow;
5664 val = be32_to_cpup(p++); /* headerpadsz */
5665 if (val)
5666 return -EINVAL; /* no support for header padding yet */
5667 attrs->max_rqst_sz = be32_to_cpup(p++);
5668 attrs->max_resp_sz = be32_to_cpup(p++);
5669 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5670 attrs->max_ops = be32_to_cpup(p++);
5671 attrs->max_reqs = be32_to_cpup(p++);
5672 nr_attrs = be32_to_cpup(p);
5673 if (unlikely(nr_attrs > 1)) {
5674 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5675 "count %u\n", __func__, nr_attrs);
5676 return -EINVAL;
5677 }
5678 if (nr_attrs == 1) {
5679 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5680 if (unlikely(!p))
5681 goto out_overflow;
5682 }
5683 return 0;
5684out_overflow:
5685 print_overflow_msg(__func__, xdr);
5686 return -EIO;
5687}
5688
5689static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5690{
5691 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5692}
5693
5694static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5695 struct nfs41_bind_conn_to_session_res *res)
5696{
5697 __be32 *p;
5698 int status;
5699
5700 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5701 if (!status)
5702 status = decode_sessionid(xdr, &res->sessionid);
5703 if (unlikely(status))
5704 return status;
5705
5706 /* dir flags, rdma mode bool */
5707 p = xdr_inline_decode(xdr, 8);
5708 if (unlikely(!p))
5709 goto out_overflow;
5710
5711 res->dir = be32_to_cpup(p++);
5712 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5713 return -EIO;
5714 if (be32_to_cpup(p) == 0)
5715 res->use_conn_in_rdma_mode = false;
5716 else
5717 res->use_conn_in_rdma_mode = true;
5718
5719 return 0;
5720out_overflow:
5721 print_overflow_msg(__func__, xdr);
5722 return -EIO;
5723}
5724
5725static int decode_create_session(struct xdr_stream *xdr,
5726 struct nfs41_create_session_res *res)
5727{
5728 __be32 *p;
5729 int status;
5730
5731 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5732 if (!status)
5733 status = decode_sessionid(xdr, &res->sessionid);
5734 if (unlikely(status))
5735 return status;
5736
5737 /* seqid, flags */
5738 p = xdr_inline_decode(xdr, 8);
5739 if (unlikely(!p))
5740 goto out_overflow;
5741 res->seqid = be32_to_cpup(p++);
5742 res->flags = be32_to_cpup(p);
5743
5744 /* Channel attributes */
5745 status = decode_chan_attrs(xdr, &res->fc_attrs);
5746 if (!status)
5747 status = decode_chan_attrs(xdr, &res->bc_attrs);
5748 return status;
5749out_overflow:
5750 print_overflow_msg(__func__, xdr);
5751 return -EIO;
5752}
5753
5754static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5755{
5756 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5757}
5758
5759static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5760{
5761 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5762}
5763
5764static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5765{
5766 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5767}
5768#endif /* CONFIG_NFS_V4_1 */
5769
5770static int decode_sequence(struct xdr_stream *xdr,
5771 struct nfs4_sequence_res *res,
5772 struct rpc_rqst *rqstp)
5773{
5774#if defined(CONFIG_NFS_V4_1)
5775 struct nfs4_session *session;
5776 struct nfs4_sessionid id;
5777 u32 dummy;
5778 int status;
5779 __be32 *p;
5780
5781 if (res->sr_slot == NULL)
5782 return 0;
5783 if (!res->sr_slot->table->session)
5784 return 0;
5785
5786 status = decode_op_hdr(xdr, OP_SEQUENCE);
5787 if (!status)
5788 status = decode_sessionid(xdr, &id);
5789 if (unlikely(status))
5790 goto out_err;
5791
5792 /*
5793 * If the server returns different values for sessionID, slotID or
5794 * sequence number, the server is looney tunes.
5795 */
5796 status = -EREMOTEIO;
5797 session = res->sr_slot->table->session;
5798
5799 if (memcmp(id.data, session->sess_id.data,
5800 NFS4_MAX_SESSIONID_LEN)) {
5801 dprintk("%s Invalid session id\n", __func__);
5802 goto out_err;
5803 }
5804
5805 p = xdr_inline_decode(xdr, 20);
5806 if (unlikely(!p))
5807 goto out_overflow;
5808
5809 /* seqid */
5810 dummy = be32_to_cpup(p++);
5811 if (dummy != res->sr_slot->seq_nr) {
5812 dprintk("%s Invalid sequence number\n", __func__);
5813 goto out_err;
5814 }
5815 /* slot id */
5816 dummy = be32_to_cpup(p++);
5817 if (dummy != res->sr_slot->slot_nr) {
5818 dprintk("%s Invalid slot id\n", __func__);
5819 goto out_err;
5820 }
5821 /* highest slot id */
5822 res->sr_highest_slotid = be32_to_cpup(p++);
5823 /* target highest slot id */
5824 res->sr_target_highest_slotid = be32_to_cpup(p++);
5825 /* result flags */
5826 res->sr_status_flags = be32_to_cpup(p);
5827 status = 0;
5828out_err:
5829 res->sr_status = status;
5830 return status;
5831out_overflow:
5832 print_overflow_msg(__func__, xdr);
5833 status = -EIO;
5834 goto out_err;
5835#else /* CONFIG_NFS_V4_1 */
5836 return 0;
5837#endif /* CONFIG_NFS_V4_1 */
5838}
5839
5840#if defined(CONFIG_NFS_V4_1)
5841static int decode_getdeviceinfo(struct xdr_stream *xdr,
5842 struct nfs4_getdeviceinfo_res *res)
5843{
5844 struct pnfs_device *pdev = res->pdev;
5845 __be32 *p;
5846 uint32_t len, type;
5847 int status;
5848
5849 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5850 if (status) {
5851 if (status == -ETOOSMALL) {
5852 p = xdr_inline_decode(xdr, 4);
5853 if (unlikely(!p))
5854 goto out_overflow;
5855 pdev->mincount = be32_to_cpup(p);
5856 dprintk("%s: Min count too small. mincnt = %u\n",
5857 __func__, pdev->mincount);
5858 }
5859 return status;
5860 }
5861
5862 p = xdr_inline_decode(xdr, 8);
5863 if (unlikely(!p))
5864 goto out_overflow;
5865 type = be32_to_cpup(p++);
5866 if (type != pdev->layout_type) {
5867 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5868 __func__, pdev->layout_type, type);
5869 return -EINVAL;
5870 }
5871 /*
5872 * Get the length of the opaque device_addr4. xdr_read_pages places
5873 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5874 * and places the remaining xdr data in xdr_buf->tail
5875 */
5876 pdev->mincount = be32_to_cpup(p);
5877 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5878 goto out_overflow;
5879
5880 /* Parse notification bitmap, verifying that it is zero. */
5881 p = xdr_inline_decode(xdr, 4);
5882 if (unlikely(!p))
5883 goto out_overflow;
5884 len = be32_to_cpup(p);
5885 if (len) {
5886 uint32_t i;
5887
5888 p = xdr_inline_decode(xdr, 4 * len);
5889 if (unlikely(!p))
5890 goto out_overflow;
5891
5892 res->notification = be32_to_cpup(p++);
5893 for (i = 1; i < len; i++) {
5894 if (be32_to_cpup(p++)) {
5895 dprintk("%s: unsupported notification\n",
5896 __func__);
5897 return -EIO;
5898 }
5899 }
5900 }
5901 return 0;
5902out_overflow:
5903 print_overflow_msg(__func__, xdr);
5904 return -EIO;
5905}
5906
5907static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5908 struct nfs4_layoutget_res *res)
5909{
5910 __be32 *p;
5911 int status;
5912 u32 layout_count;
5913 u32 recvd;
5914
5915 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5916 if (status)
5917 return status;
5918 p = xdr_inline_decode(xdr, 4);
5919 if (unlikely(!p))
5920 goto out_overflow;
5921 res->return_on_close = be32_to_cpup(p);
5922 decode_stateid(xdr, &res->stateid);
5923 p = xdr_inline_decode(xdr, 4);
5924 if (unlikely(!p))
5925 goto out_overflow;
5926 layout_count = be32_to_cpup(p);
5927 if (!layout_count) {
5928 dprintk("%s: server responded with empty layout array\n",
5929 __func__);
5930 return -EINVAL;
5931 }
5932
5933 p = xdr_inline_decode(xdr, 28);
5934 if (unlikely(!p))
5935 goto out_overflow;
5936 p = xdr_decode_hyper(p, &res->range.offset);
5937 p = xdr_decode_hyper(p, &res->range.length);
5938 res->range.iomode = be32_to_cpup(p++);
5939 res->type = be32_to_cpup(p++);
5940 res->layoutp->len = be32_to_cpup(p);
5941
5942 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5943 __func__,
5944 (unsigned long)res->range.offset,
5945 (unsigned long)res->range.length,
5946 res->range.iomode,
5947 res->type,
5948 res->layoutp->len);
5949
5950 recvd = xdr_read_pages(xdr, res->layoutp->len);
5951 if (res->layoutp->len > recvd) {
5952 dprintk("NFS: server cheating in layoutget reply: "
5953 "layout len %u > recvd %u\n",
5954 res->layoutp->len, recvd);
5955 return -EINVAL;
5956 }
5957
5958 if (layout_count > 1) {
5959 /* We only handle a length one array at the moment. Any
5960 * further entries are just ignored. Note that this means
5961 * the client may see a response that is less than the
5962 * minimum it requested.
5963 */
5964 dprintk("%s: server responded with %d layouts, dropping tail\n",
5965 __func__, layout_count);
5966 }
5967
5968 return 0;
5969out_overflow:
5970 print_overflow_msg(__func__, xdr);
5971 return -EIO;
5972}
5973
5974static int decode_layoutreturn(struct xdr_stream *xdr,
5975 struct nfs4_layoutreturn_res *res)
5976{
5977 __be32 *p;
5978 int status;
5979
5980 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5981 if (status)
5982 return status;
5983 p = xdr_inline_decode(xdr, 4);
5984 if (unlikely(!p))
5985 goto out_overflow;
5986 res->lrs_present = be32_to_cpup(p);
5987 if (res->lrs_present)
5988 status = decode_stateid(xdr, &res->stateid);
5989 return status;
5990out_overflow:
5991 print_overflow_msg(__func__, xdr);
5992 return -EIO;
5993}
5994
5995static int decode_layoutcommit(struct xdr_stream *xdr,
5996 struct rpc_rqst *req,
5997 struct nfs4_layoutcommit_res *res)
5998{
5999 __be32 *p;
6000 __u32 sizechanged;
6001 int status;
6002
6003 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6004 res->status = status;
6005 if (status)
6006 return status;
6007
6008 p = xdr_inline_decode(xdr, 4);
6009 if (unlikely(!p))
6010 goto out_overflow;
6011 sizechanged = be32_to_cpup(p);
6012
6013 if (sizechanged) {
6014 /* throw away new size */
6015 p = xdr_inline_decode(xdr, 8);
6016 if (unlikely(!p))
6017 goto out_overflow;
6018 }
6019 return 0;
6020out_overflow:
6021 print_overflow_msg(__func__, xdr);
6022 return -EIO;
6023}
6024
6025static int decode_test_stateid(struct xdr_stream *xdr,
6026 struct nfs41_test_stateid_res *res)
6027{
6028 __be32 *p;
6029 int status;
6030 int num_res;
6031
6032 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6033 if (status)
6034 return status;
6035
6036 p = xdr_inline_decode(xdr, 4);
6037 if (unlikely(!p))
6038 goto out_overflow;
6039 num_res = be32_to_cpup(p++);
6040 if (num_res != 1)
6041 goto out;
6042
6043 p = xdr_inline_decode(xdr, 4);
6044 if (unlikely(!p))
6045 goto out_overflow;
6046 res->status = be32_to_cpup(p++);
6047
6048 return status;
6049out_overflow:
6050 print_overflow_msg(__func__, xdr);
6051out:
6052 return -EIO;
6053}
6054
6055static int decode_free_stateid(struct xdr_stream *xdr,
6056 struct nfs41_free_stateid_res *res)
6057{
6058 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6059 return res->status;
6060}
6061#endif /* CONFIG_NFS_V4_1 */
6062
6063/*
6064 * END OF "GENERIC" DECODE ROUTINES.
6065 */
6066
6067/*
6068 * Decode OPEN_DOWNGRADE response
6069 */
6070static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6071 struct xdr_stream *xdr,
6072 struct nfs_closeres *res)
6073{
6074 struct compound_hdr hdr;
6075 int status;
6076
6077 status = decode_compound_hdr(xdr, &hdr);
6078 if (status)
6079 goto out;
6080 status = decode_sequence(xdr, &res->seq_res, rqstp);
6081 if (status)
6082 goto out;
6083 status = decode_putfh(xdr);
6084 if (status)
6085 goto out;
6086 status = decode_open_downgrade(xdr, res);
6087 if (status != 0)
6088 goto out;
6089 decode_getfattr(xdr, res->fattr, res->server);
6090out:
6091 return status;
6092}
6093
6094/*
6095 * Decode ACCESS response
6096 */
6097static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6098 struct nfs4_accessres *res)
6099{
6100 struct compound_hdr hdr;
6101 int status;
6102
6103 status = decode_compound_hdr(xdr, &hdr);
6104 if (status)
6105 goto out;
6106 status = decode_sequence(xdr, &res->seq_res, rqstp);
6107 if (status)
6108 goto out;
6109 status = decode_putfh(xdr);
6110 if (status != 0)
6111 goto out;
6112 status = decode_access(xdr, &res->supported, &res->access);
6113 if (status != 0)
6114 goto out;
6115 decode_getfattr(xdr, res->fattr, res->server);
6116out:
6117 return status;
6118}
6119
6120/*
6121 * Decode LOOKUP response
6122 */
6123static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6124 struct nfs4_lookup_res *res)
6125{
6126 struct compound_hdr hdr;
6127 int status;
6128
6129 status = decode_compound_hdr(xdr, &hdr);
6130 if (status)
6131 goto out;
6132 status = decode_sequence(xdr, &res->seq_res, rqstp);
6133 if (status)
6134 goto out;
6135 status = decode_putfh(xdr);
6136 if (status)
6137 goto out;
6138 status = decode_lookup(xdr);
6139 if (status)
6140 goto out;
6141 status = decode_getfh(xdr, res->fh);
6142 if (status)
6143 goto out;
6144 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6145out:
6146 return status;
6147}
6148
6149/*
6150 * Decode LOOKUP_ROOT response
6151 */
6152static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6153 struct xdr_stream *xdr,
6154 struct nfs4_lookup_res *res)
6155{
6156 struct compound_hdr hdr;
6157 int status;
6158
6159 status = decode_compound_hdr(xdr, &hdr);
6160 if (status)
6161 goto out;
6162 status = decode_sequence(xdr, &res->seq_res, rqstp);
6163 if (status)
6164 goto out;
6165 status = decode_putrootfh(xdr);
6166 if (status)
6167 goto out;
6168 status = decode_getfh(xdr, res->fh);
6169 if (status == 0)
6170 status = decode_getfattr_label(xdr, res->fattr,
6171 res->label, res->server);
6172out:
6173 return status;
6174}
6175
6176/*
6177 * Decode REMOVE response
6178 */
6179static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6180 struct nfs_removeres *res)
6181{
6182 struct compound_hdr hdr;
6183 int status;
6184
6185 status = decode_compound_hdr(xdr, &hdr);
6186 if (status)
6187 goto out;
6188 status = decode_sequence(xdr, &res->seq_res, rqstp);
6189 if (status)
6190 goto out;
6191 status = decode_putfh(xdr);
6192 if (status)
6193 goto out;
6194 status = decode_remove(xdr, &res->cinfo);
6195out:
6196 return status;
6197}
6198
6199/*
6200 * Decode RENAME response
6201 */
6202static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 struct nfs_renameres *res)
6204{
6205 struct compound_hdr hdr;
6206 int status;
6207
6208 status = decode_compound_hdr(xdr, &hdr);
6209 if (status)
6210 goto out;
6211 status = decode_sequence(xdr, &res->seq_res, rqstp);
6212 if (status)
6213 goto out;
6214 status = decode_putfh(xdr);
6215 if (status)
6216 goto out;
6217 status = decode_savefh(xdr);
6218 if (status)
6219 goto out;
6220 status = decode_putfh(xdr);
6221 if (status)
6222 goto out;
6223 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6224out:
6225 return status;
6226}
6227
6228/*
6229 * Decode LINK response
6230 */
6231static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6232 struct nfs4_link_res *res)
6233{
6234 struct compound_hdr hdr;
6235 int status;
6236
6237 status = decode_compound_hdr(xdr, &hdr);
6238 if (status)
6239 goto out;
6240 status = decode_sequence(xdr, &res->seq_res, rqstp);
6241 if (status)
6242 goto out;
6243 status = decode_putfh(xdr);
6244 if (status)
6245 goto out;
6246 status = decode_savefh(xdr);
6247 if (status)
6248 goto out;
6249 status = decode_putfh(xdr);
6250 if (status)
6251 goto out;
6252 status = decode_link(xdr, &res->cinfo);
6253 if (status)
6254 goto out;
6255 /*
6256 * Note order: OP_LINK leaves the directory as the current
6257 * filehandle.
6258 */
6259 status = decode_restorefh(xdr);
6260 if (status)
6261 goto out;
6262 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6263out:
6264 return status;
6265}
6266
6267/*
6268 * Decode CREATE response
6269 */
6270static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6271 struct nfs4_create_res *res)
6272{
6273 struct compound_hdr hdr;
6274 int status;
6275
6276 status = decode_compound_hdr(xdr, &hdr);
6277 if (status)
6278 goto out;
6279 status = decode_sequence(xdr, &res->seq_res, rqstp);
6280 if (status)
6281 goto out;
6282 status = decode_putfh(xdr);
6283 if (status)
6284 goto out;
6285 status = decode_create(xdr, &res->dir_cinfo);
6286 if (status)
6287 goto out;
6288 status = decode_getfh(xdr, res->fh);
6289 if (status)
6290 goto out;
6291 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6292out:
6293 return status;
6294}
6295
6296/*
6297 * Decode SYMLINK response
6298 */
6299static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300 struct nfs4_create_res *res)
6301{
6302 return nfs4_xdr_dec_create(rqstp, xdr, res);
6303}
6304
6305/*
6306 * Decode GETATTR response
6307 */
6308static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6309 struct nfs4_getattr_res *res)
6310{
6311 struct compound_hdr hdr;
6312 int status;
6313
6314 status = decode_compound_hdr(xdr, &hdr);
6315 if (status)
6316 goto out;
6317 status = decode_sequence(xdr, &res->seq_res, rqstp);
6318 if (status)
6319 goto out;
6320 status = decode_putfh(xdr);
6321 if (status)
6322 goto out;
6323 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6324out:
6325 return status;
6326}
6327
6328/*
6329 * Encode an SETACL request
6330 */
6331static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6332 struct nfs_setaclargs *args)
6333{
6334 struct compound_hdr hdr = {
6335 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336 };
6337
6338 encode_compound_hdr(xdr, req, &hdr);
6339 encode_sequence(xdr, &args->seq_args, &hdr);
6340 encode_putfh(xdr, args->fh, &hdr);
6341 encode_setacl(xdr, args, &hdr);
6342 encode_nops(&hdr);
6343}
6344
6345/*
6346 * Decode SETACL response
6347 */
6348static int
6349nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350 struct nfs_setaclres *res)
6351{
6352 struct compound_hdr hdr;
6353 int status;
6354
6355 status = decode_compound_hdr(xdr, &hdr);
6356 if (status)
6357 goto out;
6358 status = decode_sequence(xdr, &res->seq_res, rqstp);
6359 if (status)
6360 goto out;
6361 status = decode_putfh(xdr);
6362 if (status)
6363 goto out;
6364 status = decode_setattr(xdr);
6365out:
6366 return status;
6367}
6368
6369/*
6370 * Decode GETACL response
6371 */
6372static int
6373nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374 struct nfs_getaclres *res)
6375{
6376 struct compound_hdr hdr;
6377 int status;
6378
6379 if (res->acl_scratch != NULL) {
6380 void *p = page_address(res->acl_scratch);
6381 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6382 }
6383 status = decode_compound_hdr(xdr, &hdr);
6384 if (status)
6385 goto out;
6386 status = decode_sequence(xdr, &res->seq_res, rqstp);
6387 if (status)
6388 goto out;
6389 status = decode_putfh(xdr);
6390 if (status)
6391 goto out;
6392 status = decode_getacl(xdr, rqstp, res);
6393
6394out:
6395 return status;
6396}
6397
6398/*
6399 * Decode CLOSE response
6400 */
6401static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6402 struct nfs_closeres *res)
6403{
6404 struct compound_hdr hdr;
6405 int status;
6406
6407 status = decode_compound_hdr(xdr, &hdr);
6408 if (status)
6409 goto out;
6410 status = decode_sequence(xdr, &res->seq_res, rqstp);
6411 if (status)
6412 goto out;
6413 status = decode_putfh(xdr);
6414 if (status)
6415 goto out;
6416 status = decode_close(xdr, res);
6417 if (status != 0)
6418 goto out;
6419 /*
6420 * Note: Server may do delete on close for this file
6421 * in which case the getattr call will fail with
6422 * an ESTALE error. Shouldn't be a problem,
6423 * though, since fattr->valid will remain unset.
6424 */
6425 decode_getfattr(xdr, res->fattr, res->server);
6426out:
6427 return status;
6428}
6429
6430/*
6431 * Decode OPEN response
6432 */
6433static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6434 struct nfs_openres *res)
6435{
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 status = decode_open(xdr, res);
6449 if (status)
6450 goto out;
6451 status = decode_getfh(xdr, &res->fh);
6452 if (status)
6453 goto out;
6454 if (res->access_request)
6455 decode_access(xdr, &res->access_supported, &res->access_result);
6456 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6457out:
6458 return status;
6459}
6460
6461/*
6462 * Decode OPEN_CONFIRM response
6463 */
6464static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6465 struct xdr_stream *xdr,
6466 struct nfs_open_confirmres *res)
6467{
6468 struct compound_hdr hdr;
6469 int status;
6470
6471 status = decode_compound_hdr(xdr, &hdr);
6472 if (status)
6473 goto out;
6474 status = decode_putfh(xdr);
6475 if (status)
6476 goto out;
6477 status = decode_open_confirm(xdr, res);
6478out:
6479 return status;
6480}
6481
6482/*
6483 * Decode OPEN response
6484 */
6485static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6486 struct xdr_stream *xdr,
6487 struct nfs_openres *res)
6488{
6489 struct compound_hdr hdr;
6490 int status;
6491
6492 status = decode_compound_hdr(xdr, &hdr);
6493 if (status)
6494 goto out;
6495 status = decode_sequence(xdr, &res->seq_res, rqstp);
6496 if (status)
6497 goto out;
6498 status = decode_putfh(xdr);
6499 if (status)
6500 goto out;
6501 status = decode_open(xdr, res);
6502 if (status)
6503 goto out;
6504 if (res->access_request)
6505 decode_access(xdr, &res->access_supported, &res->access_result);
6506 decode_getfattr(xdr, res->f_attr, res->server);
6507out:
6508 return status;
6509}
6510
6511/*
6512 * Decode SETATTR response
6513 */
6514static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6515 struct xdr_stream *xdr,
6516 struct nfs_setattrres *res)
6517{
6518 struct compound_hdr hdr;
6519 int status;
6520
6521 status = decode_compound_hdr(xdr, &hdr);
6522 if (status)
6523 goto out;
6524 status = decode_sequence(xdr, &res->seq_res, rqstp);
6525 if (status)
6526 goto out;
6527 status = decode_putfh(xdr);
6528 if (status)
6529 goto out;
6530 status = decode_setattr(xdr);
6531 if (status)
6532 goto out;
6533 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6534out:
6535 return status;
6536}
6537
6538/*
6539 * Decode LOCK response
6540 */
6541static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6542 struct nfs_lock_res *res)
6543{
6544 struct compound_hdr hdr;
6545 int status;
6546
6547 status = decode_compound_hdr(xdr, &hdr);
6548 if (status)
6549 goto out;
6550 status = decode_sequence(xdr, &res->seq_res, rqstp);
6551 if (status)
6552 goto out;
6553 status = decode_putfh(xdr);
6554 if (status)
6555 goto out;
6556 status = decode_lock(xdr, res);
6557out:
6558 return status;
6559}
6560
6561/*
6562 * Decode LOCKT response
6563 */
6564static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6565 struct nfs_lockt_res *res)
6566{
6567 struct compound_hdr hdr;
6568 int status;
6569
6570 status = decode_compound_hdr(xdr, &hdr);
6571 if (status)
6572 goto out;
6573 status = decode_sequence(xdr, &res->seq_res, rqstp);
6574 if (status)
6575 goto out;
6576 status = decode_putfh(xdr);
6577 if (status)
6578 goto out;
6579 status = decode_lockt(xdr, res);
6580out:
6581 return status;
6582}
6583
6584/*
6585 * Decode LOCKU response
6586 */
6587static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6588 struct nfs_locku_res *res)
6589{
6590 struct compound_hdr hdr;
6591 int status;
6592
6593 status = decode_compound_hdr(xdr, &hdr);
6594 if (status)
6595 goto out;
6596 status = decode_sequence(xdr, &res->seq_res, rqstp);
6597 if (status)
6598 goto out;
6599 status = decode_putfh(xdr);
6600 if (status)
6601 goto out;
6602 status = decode_locku(xdr, res);
6603out:
6604 return status;
6605}
6606
6607static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6608 struct xdr_stream *xdr, void *dummy)
6609{
6610 struct compound_hdr hdr;
6611 int status;
6612
6613 status = decode_compound_hdr(xdr, &hdr);
6614 if (!status)
6615 status = decode_release_lockowner(xdr);
6616 return status;
6617}
6618
6619/*
6620 * Decode READLINK response
6621 */
6622static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6623 struct xdr_stream *xdr,
6624 struct nfs4_readlink_res *res)
6625{
6626 struct compound_hdr hdr;
6627 int status;
6628
6629 status = decode_compound_hdr(xdr, &hdr);
6630 if (status)
6631 goto out;
6632 status = decode_sequence(xdr, &res->seq_res, rqstp);
6633 if (status)
6634 goto out;
6635 status = decode_putfh(xdr);
6636 if (status)
6637 goto out;
6638 status = decode_readlink(xdr, rqstp);
6639out:
6640 return status;
6641}
6642
6643/*
6644 * Decode READDIR response
6645 */
6646static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6647 struct nfs4_readdir_res *res)
6648{
6649 struct compound_hdr hdr;
6650 int status;
6651
6652 status = decode_compound_hdr(xdr, &hdr);
6653 if (status)
6654 goto out;
6655 status = decode_sequence(xdr, &res->seq_res, rqstp);
6656 if (status)
6657 goto out;
6658 status = decode_putfh(xdr);
6659 if (status)
6660 goto out;
6661 status = decode_readdir(xdr, rqstp, res);
6662out:
6663 return status;
6664}
6665
6666/*
6667 * Decode Read response
6668 */
6669static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6670 struct nfs_pgio_res *res)
6671{
6672 struct compound_hdr hdr;
6673 int status;
6674
6675 status = decode_compound_hdr(xdr, &hdr);
6676 res->op_status = hdr.status;
6677 if (status)
6678 goto out;
6679 status = decode_sequence(xdr, &res->seq_res, rqstp);
6680 if (status)
6681 goto out;
6682 status = decode_putfh(xdr);
6683 if (status)
6684 goto out;
6685 status = decode_read(xdr, rqstp, res);
6686 if (!status)
6687 status = res->count;
6688out:
6689 return status;
6690}
6691
6692/*
6693 * Decode WRITE response
6694 */
6695static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696 struct nfs_pgio_res *res)
6697{
6698 struct compound_hdr hdr;
6699 int status;
6700
6701 status = decode_compound_hdr(xdr, &hdr);
6702 res->op_status = hdr.status;
6703 if (status)
6704 goto out;
6705 status = decode_sequence(xdr, &res->seq_res, rqstp);
6706 if (status)
6707 goto out;
6708 status = decode_putfh(xdr);
6709 if (status)
6710 goto out;
6711 status = decode_write(xdr, res);
6712 if (status)
6713 goto out;
6714 if (res->fattr)
6715 decode_getfattr(xdr, res->fattr, res->server);
6716 if (!status)
6717 status = res->count;
6718out:
6719 return status;
6720}
6721
6722/*
6723 * Decode COMMIT response
6724 */
6725static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6726 struct nfs_commitres *res)
6727{
6728 struct compound_hdr hdr;
6729 int status;
6730
6731 status = decode_compound_hdr(xdr, &hdr);
6732 res->op_status = hdr.status;
6733 if (status)
6734 goto out;
6735 status = decode_sequence(xdr, &res->seq_res, rqstp);
6736 if (status)
6737 goto out;
6738 status = decode_putfh(xdr);
6739 if (status)
6740 goto out;
6741 status = decode_commit(xdr, res);
6742out:
6743 return status;
6744}
6745
6746/*
6747 * Decode FSINFO response
6748 */
6749static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6750 struct nfs4_fsinfo_res *res)
6751{
6752 struct compound_hdr hdr;
6753 int status;
6754
6755 status = decode_compound_hdr(xdr, &hdr);
6756 if (!status)
6757 status = decode_sequence(xdr, &res->seq_res, req);
6758 if (!status)
6759 status = decode_putfh(xdr);
6760 if (!status)
6761 status = decode_fsinfo(xdr, res->fsinfo);
6762 return status;
6763}
6764
6765/*
6766 * Decode PATHCONF response
6767 */
6768static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6769 struct nfs4_pathconf_res *res)
6770{
6771 struct compound_hdr hdr;
6772 int status;
6773
6774 status = decode_compound_hdr(xdr, &hdr);
6775 if (!status)
6776 status = decode_sequence(xdr, &res->seq_res, req);
6777 if (!status)
6778 status = decode_putfh(xdr);
6779 if (!status)
6780 status = decode_pathconf(xdr, res->pathconf);
6781 return status;
6782}
6783
6784/*
6785 * Decode STATFS response
6786 */
6787static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6788 struct nfs4_statfs_res *res)
6789{
6790 struct compound_hdr hdr;
6791 int status;
6792
6793 status = decode_compound_hdr(xdr, &hdr);
6794 if (!status)
6795 status = decode_sequence(xdr, &res->seq_res, req);
6796 if (!status)
6797 status = decode_putfh(xdr);
6798 if (!status)
6799 status = decode_statfs(xdr, res->fsstat);
6800 return status;
6801}
6802
6803/*
6804 * Decode GETATTR_BITMAP response
6805 */
6806static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6807 struct xdr_stream *xdr,
6808 struct nfs4_server_caps_res *res)
6809{
6810 struct compound_hdr hdr;
6811 int status;
6812
6813 status = decode_compound_hdr(xdr, &hdr);
6814 if (status)
6815 goto out;
6816 status = decode_sequence(xdr, &res->seq_res, req);
6817 if (status)
6818 goto out;
6819 status = decode_putfh(xdr);
6820 if (status)
6821 goto out;
6822 status = decode_server_caps(xdr, res);
6823out:
6824 return status;
6825}
6826
6827/*
6828 * Decode RENEW response
6829 */
6830static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6831 void *__unused)
6832{
6833 struct compound_hdr hdr;
6834 int status;
6835
6836 status = decode_compound_hdr(xdr, &hdr);
6837 if (!status)
6838 status = decode_renew(xdr);
6839 return status;
6840}
6841
6842/*
6843 * Decode SETCLIENTID response
6844 */
6845static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6846 struct xdr_stream *xdr,
6847 struct nfs4_setclientid_res *res)
6848{
6849 struct compound_hdr hdr;
6850 int status;
6851
6852 status = decode_compound_hdr(xdr, &hdr);
6853 if (!status)
6854 status = decode_setclientid(xdr, res);
6855 return status;
6856}
6857
6858/*
6859 * Decode SETCLIENTID_CONFIRM response
6860 */
6861static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6862 struct xdr_stream *xdr)
6863{
6864 struct compound_hdr hdr;
6865 int status;
6866
6867 status = decode_compound_hdr(xdr, &hdr);
6868 if (!status)
6869 status = decode_setclientid_confirm(xdr);
6870 return status;
6871}
6872
6873/*
6874 * Decode DELEGRETURN response
6875 */
6876static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6877 struct xdr_stream *xdr,
6878 struct nfs4_delegreturnres *res)
6879{
6880 struct compound_hdr hdr;
6881 int status;
6882
6883 status = decode_compound_hdr(xdr, &hdr);
6884 if (status)
6885 goto out;
6886 status = decode_sequence(xdr, &res->seq_res, rqstp);
6887 if (status)
6888 goto out;
6889 status = decode_putfh(xdr);
6890 if (status != 0)
6891 goto out;
6892 status = decode_getfattr(xdr, res->fattr, res->server);
6893 if (status != 0)
6894 goto out;
6895 status = decode_delegreturn(xdr);
6896out:
6897 return status;
6898}
6899
6900/*
6901 * Decode FS_LOCATIONS response
6902 */
6903static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6904 struct xdr_stream *xdr,
6905 struct nfs4_fs_locations_res *res)
6906{
6907 struct compound_hdr hdr;
6908 int status;
6909
6910 status = decode_compound_hdr(xdr, &hdr);
6911 if (status)
6912 goto out;
6913 status = decode_sequence(xdr, &res->seq_res, req);
6914 if (status)
6915 goto out;
6916 status = decode_putfh(xdr);
6917 if (status)
6918 goto out;
6919 if (res->migration) {
6920 xdr_enter_page(xdr, PAGE_SIZE);
6921 status = decode_getfattr_generic(xdr,
6922 &res->fs_locations->fattr,
6923 NULL, res->fs_locations,
6924 NULL, res->fs_locations->server);
6925 if (status)
6926 goto out;
6927 if (res->renew)
6928 status = decode_renew(xdr);
6929 } else {
6930 status = decode_lookup(xdr);
6931 if (status)
6932 goto out;
6933 xdr_enter_page(xdr, PAGE_SIZE);
6934 status = decode_getfattr_generic(xdr,
6935 &res->fs_locations->fattr,
6936 NULL, res->fs_locations,
6937 NULL, res->fs_locations->server);
6938 }
6939out:
6940 return status;
6941}
6942
6943/*
6944 * Decode SECINFO response
6945 */
6946static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6947 struct xdr_stream *xdr,
6948 struct nfs4_secinfo_res *res)
6949{
6950 struct compound_hdr hdr;
6951 int status;
6952
6953 status = decode_compound_hdr(xdr, &hdr);
6954 if (status)
6955 goto out;
6956 status = decode_sequence(xdr, &res->seq_res, rqstp);
6957 if (status)
6958 goto out;
6959 status = decode_putfh(xdr);
6960 if (status)
6961 goto out;
6962 status = decode_secinfo(xdr, res);
6963out:
6964 return status;
6965}
6966
6967/*
6968 * Decode FSID_PRESENT response
6969 */
6970static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6971 struct xdr_stream *xdr,
6972 struct nfs4_fsid_present_res *res)
6973{
6974 struct compound_hdr hdr;
6975 int status;
6976
6977 status = decode_compound_hdr(xdr, &hdr);
6978 if (status)
6979 goto out;
6980 status = decode_sequence(xdr, &res->seq_res, rqstp);
6981 if (status)
6982 goto out;
6983 status = decode_putfh(xdr);
6984 if (status)
6985 goto out;
6986 status = decode_getfh(xdr, res->fh);
6987 if (status)
6988 goto out;
6989 if (res->renew)
6990 status = decode_renew(xdr);
6991out:
6992 return status;
6993}
6994
6995#if defined(CONFIG_NFS_V4_1)
6996/*
6997 * Decode BIND_CONN_TO_SESSION response
6998 */
6999static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7000 struct xdr_stream *xdr,
7001 void *res)
7002{
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (!status)
7008 status = decode_bind_conn_to_session(xdr, res);
7009 return status;
7010}
7011
7012/*
7013 * Decode EXCHANGE_ID response
7014 */
7015static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7016 struct xdr_stream *xdr,
7017 void *res)
7018{
7019 struct compound_hdr hdr;
7020 int status;
7021
7022 status = decode_compound_hdr(xdr, &hdr);
7023 if (!status)
7024 status = decode_exchange_id(xdr, res);
7025 return status;
7026}
7027
7028/*
7029 * Decode CREATE_SESSION response
7030 */
7031static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7032 struct xdr_stream *xdr,
7033 struct nfs41_create_session_res *res)
7034{
7035 struct compound_hdr hdr;
7036 int status;
7037
7038 status = decode_compound_hdr(xdr, &hdr);
7039 if (!status)
7040 status = decode_create_session(xdr, res);
7041 return status;
7042}
7043
7044/*
7045 * Decode DESTROY_SESSION response
7046 */
7047static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7048 struct xdr_stream *xdr,
7049 void *res)
7050{
7051 struct compound_hdr hdr;
7052 int status;
7053
7054 status = decode_compound_hdr(xdr, &hdr);
7055 if (!status)
7056 status = decode_destroy_session(xdr, res);
7057 return status;
7058}
7059
7060/*
7061 * Decode DESTROY_CLIENTID response
7062 */
7063static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7064 struct xdr_stream *xdr,
7065 void *res)
7066{
7067 struct compound_hdr hdr;
7068 int status;
7069
7070 status = decode_compound_hdr(xdr, &hdr);
7071 if (!status)
7072 status = decode_destroy_clientid(xdr, res);
7073 return status;
7074}
7075
7076/*
7077 * Decode SEQUENCE response
7078 */
7079static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7080 struct xdr_stream *xdr,
7081 struct nfs4_sequence_res *res)
7082{
7083 struct compound_hdr hdr;
7084 int status;
7085
7086 status = decode_compound_hdr(xdr, &hdr);
7087 if (!status)
7088 status = decode_sequence(xdr, res, rqstp);
7089 return status;
7090}
7091
7092/*
7093 * Decode GET_LEASE_TIME response
7094 */
7095static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7096 struct xdr_stream *xdr,
7097 struct nfs4_get_lease_time_res *res)
7098{
7099 struct compound_hdr hdr;
7100 int status;
7101
7102 status = decode_compound_hdr(xdr, &hdr);
7103 if (!status)
7104 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7105 if (!status)
7106 status = decode_putrootfh(xdr);
7107 if (!status)
7108 status = decode_fsinfo(xdr, res->lr_fsinfo);
7109 return status;
7110}
7111
7112/*
7113 * Decode RECLAIM_COMPLETE response
7114 */
7115static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7116 struct xdr_stream *xdr,
7117 struct nfs41_reclaim_complete_res *res)
7118{
7119 struct compound_hdr hdr;
7120 int status;
7121
7122 status = decode_compound_hdr(xdr, &hdr);
7123 if (!status)
7124 status = decode_sequence(xdr, &res->seq_res, rqstp);
7125 if (!status)
7126 status = decode_reclaim_complete(xdr, NULL);
7127 return status;
7128}
7129
7130/*
7131 * Decode GETDEVINFO response
7132 */
7133static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7134 struct xdr_stream *xdr,
7135 struct nfs4_getdeviceinfo_res *res)
7136{
7137 struct compound_hdr hdr;
7138 int status;
7139
7140 status = decode_compound_hdr(xdr, &hdr);
7141 if (status != 0)
7142 goto out;
7143 status = decode_sequence(xdr, &res->seq_res, rqstp);
7144 if (status != 0)
7145 goto out;
7146 status = decode_getdeviceinfo(xdr, res);
7147out:
7148 return status;
7149}
7150
7151/*
7152 * Decode LAYOUTGET response
7153 */
7154static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7155 struct xdr_stream *xdr,
7156 struct nfs4_layoutget_res *res)
7157{
7158 struct compound_hdr hdr;
7159 int status;
7160
7161 status = decode_compound_hdr(xdr, &hdr);
7162 if (status)
7163 goto out;
7164 status = decode_sequence(xdr, &res->seq_res, rqstp);
7165 if (status)
7166 goto out;
7167 status = decode_putfh(xdr);
7168 if (status)
7169 goto out;
7170 status = decode_layoutget(xdr, rqstp, res);
7171out:
7172 return status;
7173}
7174
7175/*
7176 * Decode LAYOUTRETURN response
7177 */
7178static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 struct nfs4_layoutreturn_res *res)
7181{
7182 struct compound_hdr hdr;
7183 int status;
7184
7185 status = decode_compound_hdr(xdr, &hdr);
7186 if (status)
7187 goto out;
7188 status = decode_sequence(xdr, &res->seq_res, rqstp);
7189 if (status)
7190 goto out;
7191 status = decode_putfh(xdr);
7192 if (status)
7193 goto out;
7194 status = decode_layoutreturn(xdr, res);
7195out:
7196 return status;
7197}
7198
7199/*
7200 * Decode LAYOUTCOMMIT response
7201 */
7202static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7203 struct xdr_stream *xdr,
7204 struct nfs4_layoutcommit_res *res)
7205{
7206 struct compound_hdr hdr;
7207 int status;
7208
7209 status = decode_compound_hdr(xdr, &hdr);
7210 if (status)
7211 goto out;
7212 status = decode_sequence(xdr, &res->seq_res, rqstp);
7213 if (status)
7214 goto out;
7215 status = decode_putfh(xdr);
7216 if (status)
7217 goto out;
7218 status = decode_layoutcommit(xdr, rqstp, res);
7219 if (status)
7220 goto out;
7221 decode_getfattr(xdr, res->fattr, res->server);
7222out:
7223 return status;
7224}
7225
7226/*
7227 * Decode SECINFO_NO_NAME response
7228 */
7229static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7230 struct xdr_stream *xdr,
7231 struct nfs4_secinfo_res *res)
7232{
7233 struct compound_hdr hdr;
7234 int status;
7235
7236 status = decode_compound_hdr(xdr, &hdr);
7237 if (status)
7238 goto out;
7239 status = decode_sequence(xdr, &res->seq_res, rqstp);
7240 if (status)
7241 goto out;
7242 status = decode_putrootfh(xdr);
7243 if (status)
7244 goto out;
7245 status = decode_secinfo_no_name(xdr, res);
7246out:
7247 return status;
7248}
7249
7250/*
7251 * Decode TEST_STATEID response
7252 */
7253static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7254 struct xdr_stream *xdr,
7255 struct nfs41_test_stateid_res *res)
7256{
7257 struct compound_hdr hdr;
7258 int status;
7259
7260 status = decode_compound_hdr(xdr, &hdr);
7261 if (status)
7262 goto out;
7263 status = decode_sequence(xdr, &res->seq_res, rqstp);
7264 if (status)
7265 goto out;
7266 status = decode_test_stateid(xdr, res);
7267out:
7268 return status;
7269}
7270
7271/*
7272 * Decode FREE_STATEID response
7273 */
7274static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7275 struct xdr_stream *xdr,
7276 struct nfs41_free_stateid_res *res)
7277{
7278 struct compound_hdr hdr;
7279 int status;
7280
7281 status = decode_compound_hdr(xdr, &hdr);
7282 if (status)
7283 goto out;
7284 status = decode_sequence(xdr, &res->seq_res, rqstp);
7285 if (status)
7286 goto out;
7287 status = decode_free_stateid(xdr, res);
7288out:
7289 return status;
7290}
7291#endif /* CONFIG_NFS_V4_1 */
7292
7293/**
7294 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7295 * the local page cache.
7296 * @xdr: XDR stream where entry resides
7297 * @entry: buffer to fill in with entry data
7298 * @plus: boolean indicating whether this should be a readdirplus entry
7299 *
7300 * Returns zero if successful, otherwise a negative errno value is
7301 * returned.
7302 *
7303 * This function is not invoked during READDIR reply decoding, but
7304 * rather whenever an application invokes the getdents(2) system call
7305 * on a directory already in our cache.
7306 */
7307int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7308 int plus)
7309{
7310 unsigned int savep;
7311 uint32_t bitmap[3] = {0};
7312 uint32_t len;
7313 __be32 *p = xdr_inline_decode(xdr, 4);
7314 if (unlikely(!p))
7315 goto out_overflow;
7316 if (*p == xdr_zero) {
7317 p = xdr_inline_decode(xdr, 4);
7318 if (unlikely(!p))
7319 goto out_overflow;
7320 if (*p == xdr_zero)
7321 return -EAGAIN;
7322 entry->eof = 1;
7323 return -EBADCOOKIE;
7324 }
7325
7326 p = xdr_inline_decode(xdr, 12);
7327 if (unlikely(!p))
7328 goto out_overflow;
7329 entry->prev_cookie = entry->cookie;
7330 p = xdr_decode_hyper(p, &entry->cookie);
7331 entry->len = be32_to_cpup(p);
7332
7333 p = xdr_inline_decode(xdr, entry->len);
7334 if (unlikely(!p))
7335 goto out_overflow;
7336 entry->name = (const char *) p;
7337
7338 /*
7339 * In case the server doesn't return an inode number,
7340 * we fake one here. (We don't use inode number 0,
7341 * since glibc seems to choke on it...)
7342 */
7343 entry->ino = 1;
7344 entry->fattr->valid = 0;
7345
7346 if (decode_attr_bitmap(xdr, bitmap) < 0)
7347 goto out_overflow;
7348
7349 if (decode_attr_length(xdr, &len, &savep) < 0)
7350 goto out_overflow;
7351
7352 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7353 NULL, entry->label, entry->server) < 0)
7354 goto out_overflow;
7355 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7356 entry->ino = entry->fattr->mounted_on_fileid;
7357 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7358 entry->ino = entry->fattr->fileid;
7359
7360 entry->d_type = DT_UNKNOWN;
7361 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7362 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7363
7364 return 0;
7365
7366out_overflow:
7367 print_overflow_msg(__func__, xdr);
7368 return -EAGAIN;
7369}
7370
7371/*
7372 * We need to translate between nfs status return values and
7373 * the local errno values which may not be the same.
7374 */
7375static struct {
7376 int stat;
7377 int errno;
7378} nfs_errtbl[] = {
7379 { NFS4_OK, 0 },
7380 { NFS4ERR_PERM, -EPERM },
7381 { NFS4ERR_NOENT, -ENOENT },
7382 { NFS4ERR_IO, -errno_NFSERR_IO},
7383 { NFS4ERR_NXIO, -ENXIO },
7384 { NFS4ERR_ACCESS, -EACCES },
7385 { NFS4ERR_EXIST, -EEXIST },
7386 { NFS4ERR_XDEV, -EXDEV },
7387 { NFS4ERR_NOTDIR, -ENOTDIR },
7388 { NFS4ERR_ISDIR, -EISDIR },
7389 { NFS4ERR_INVAL, -EINVAL },
7390 { NFS4ERR_FBIG, -EFBIG },
7391 { NFS4ERR_NOSPC, -ENOSPC },
7392 { NFS4ERR_ROFS, -EROFS },
7393 { NFS4ERR_MLINK, -EMLINK },
7394 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7395 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7396 { NFS4ERR_DQUOT, -EDQUOT },
7397 { NFS4ERR_STALE, -ESTALE },
7398 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7399 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7400 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7401 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7402 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7403 { NFS4ERR_BADTYPE, -EBADTYPE },
7404 { NFS4ERR_LOCKED, -EAGAIN },
7405 { NFS4ERR_SYMLINK, -ELOOP },
7406 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7407 { NFS4ERR_DEADLOCK, -EDEADLK },
7408 { -1, -EIO }
7409};
7410
7411/*
7412 * Convert an NFS error code to a local one.
7413 * This one is used jointly by NFSv2 and NFSv3.
7414 */
7415static int
7416nfs4_stat_to_errno(int stat)
7417{
7418 int i;
7419 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7420 if (nfs_errtbl[i].stat == stat)
7421 return nfs_errtbl[i].errno;
7422 }
7423 if (stat <= 10000 || stat > 10100) {
7424 /* The server is looney tunes. */
7425 return -EREMOTEIO;
7426 }
7427 /* If we cannot translate the error, the recovery routines should
7428 * handle it.
7429 * Note: remaining NFSv4 error codes have values > 10000, so should
7430 * not conflict with native Linux error codes.
7431 */
7432 return -stat;
7433}
7434
7435#ifdef CONFIG_NFS_V4_2
7436#include "nfs42xdr.c"
7437#endif /* CONFIG_NFS_V4_2 */
7438
7439#define PROC(proc, argtype, restype) \
7440[NFSPROC4_CLNT_##proc] = { \
7441 .p_proc = NFSPROC4_COMPOUND, \
7442 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7443 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7444 .p_arglen = NFS4_##argtype##_sz, \
7445 .p_replen = NFS4_##restype##_sz, \
7446 .p_statidx = NFSPROC4_CLNT_##proc, \
7447 .p_name = #proc, \
7448}
7449
7450#define STUB(proc) \
7451[NFSPROC4_CLNT_##proc] = { \
7452 .p_name = #proc, \
7453}
7454
7455struct rpc_procinfo nfs4_procedures[] = {
7456 PROC(READ, enc_read, dec_read),
7457 PROC(WRITE, enc_write, dec_write),
7458 PROC(COMMIT, enc_commit, dec_commit),
7459 PROC(OPEN, enc_open, dec_open),
7460 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7461 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7462 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7463 PROC(CLOSE, enc_close, dec_close),
7464 PROC(SETATTR, enc_setattr, dec_setattr),
7465 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7466 PROC(RENEW, enc_renew, dec_renew),
7467 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7468 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7469 PROC(LOCK, enc_lock, dec_lock),
7470 PROC(LOCKT, enc_lockt, dec_lockt),
7471 PROC(LOCKU, enc_locku, dec_locku),
7472 PROC(ACCESS, enc_access, dec_access),
7473 PROC(GETATTR, enc_getattr, dec_getattr),
7474 PROC(LOOKUP, enc_lookup, dec_lookup),
7475 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7476 PROC(REMOVE, enc_remove, dec_remove),
7477 PROC(RENAME, enc_rename, dec_rename),
7478 PROC(LINK, enc_link, dec_link),
7479 PROC(SYMLINK, enc_symlink, dec_symlink),
7480 PROC(CREATE, enc_create, dec_create),
7481 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7482 PROC(STATFS, enc_statfs, dec_statfs),
7483 PROC(READLINK, enc_readlink, dec_readlink),
7484 PROC(READDIR, enc_readdir, dec_readdir),
7485 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7486 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7487 PROC(GETACL, enc_getacl, dec_getacl),
7488 PROC(SETACL, enc_setacl, dec_setacl),
7489 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7490 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7491 PROC(SECINFO, enc_secinfo, dec_secinfo),
7492 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7493#if defined(CONFIG_NFS_V4_1)
7494 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7495 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7496 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7497 PROC(SEQUENCE, enc_sequence, dec_sequence),
7498 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7499 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7500 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7501 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7502 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7503 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7504 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7505 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7506 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7507 STUB(GETDEVICELIST),
7508 PROC(BIND_CONN_TO_SESSION,
7509 enc_bind_conn_to_session, dec_bind_conn_to_session),
7510 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7511#endif /* CONFIG_NFS_V4_1 */
7512#ifdef CONFIG_NFS_V4_2
7513 PROC(SEEK, enc_seek, dec_seek),
7514 PROC(ALLOCATE, enc_allocate, dec_allocate),
7515 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7516 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7517 PROC(CLONE, enc_clone, dec_clone),
7518#endif /* CONFIG_NFS_V4_2 */
7519};
7520
7521const struct rpc_version nfs_version4 = {
7522 .number = 4,
7523 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7524 .procs = nfs4_procedures
7525};
7526
7527/*
7528 * Local variables:
7529 * c-basic-offset: 8
7530 * End:
7531 */