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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#include <linux/nfs_idmap.h>
56
57#include "nfs4_fs.h"
58#include "internal.h"
59#include "pnfs.h"
60#include "netns.h"
61
62#define NFSDBG_FACILITY NFSDBG_XDR
63
64/* Mapping from NFS error code to "errno" error code. */
65#define errno_NFSERR_IO EIO
66
67static int nfs4_stat_to_errno(int);
68
69/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
70#ifdef DEBUG
71#define NFS4_MAXTAGLEN 20
72#else
73#define NFS4_MAXTAGLEN 0
74#endif
75
76/* lock,open owner id:
77 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
78 */
79#define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
80#define lock_owner_id_maxsz (1 + 1 + 4)
81#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
82#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
83#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84#define op_encode_hdr_maxsz (1)
85#define op_decode_hdr_maxsz (2)
86#define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
87#define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88#define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
89#define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
91 (NFS4_FHSIZE >> 2))
92#define decode_putfh_maxsz (op_decode_hdr_maxsz)
93#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
94#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
95#define encode_getfh_maxsz (op_encode_hdr_maxsz)
96#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
97 ((3+NFS4_FHSIZE) >> 2))
98#define nfs4_fattr_bitmap_maxsz 4
99#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
100#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
101#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
102#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
103#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104/* We support only one layout type per file system */
105#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
106/* This is based on getfattr, which uses the most attributes: */
107#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
108 3 + 3 + 3 + nfs4_owner_maxsz + \
109 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
110#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
111 nfs4_fattr_value_maxsz)
112#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
113#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
114 1 + 2 + 1 + \
115 nfs4_owner_maxsz + \
116 nfs4_group_maxsz + \
117 4 + 4)
118#define encode_savefh_maxsz (op_encode_hdr_maxsz)
119#define decode_savefh_maxsz (op_decode_hdr_maxsz)
120#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
121#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
122#define encode_fsinfo_maxsz (encode_getattr_maxsz)
123/* The 5 accounts for the PNFS attributes, and assumes that at most three
124 * layout types will be returned.
125 */
126#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
127 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
128#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
129#define decode_renew_maxsz (op_decode_hdr_maxsz)
130#define encode_setclientid_maxsz \
131 (op_encode_hdr_maxsz + \
132 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
133 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
134 1 /* sc_prog */ + \
135 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
136 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
137 1) /* sc_cb_ident */
138#define decode_setclientid_maxsz \
139 (op_decode_hdr_maxsz + \
140 2 + \
141 1024) /* large value for CLID_INUSE */
142#define encode_setclientid_confirm_maxsz \
143 (op_encode_hdr_maxsz + \
144 3 + (NFS4_VERIFIER_SIZE >> 2))
145#define decode_setclientid_confirm_maxsz \
146 (op_decode_hdr_maxsz)
147#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
148#define decode_lookup_maxsz (op_decode_hdr_maxsz)
149#define encode_share_access_maxsz \
150 (2)
151#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
152#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
153#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
154#define encode_open_maxsz (op_encode_hdr_maxsz + \
155 2 + encode_share_access_maxsz + 2 + \
156 open_owner_id_maxsz + \
157 encode_opentype_maxsz + \
158 encode_claim_null_maxsz)
159#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
160#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
161 decode_ace_maxsz)
162#define decode_change_info_maxsz (5)
163#define decode_open_maxsz (op_decode_hdr_maxsz + \
164 decode_stateid_maxsz + \
165 decode_change_info_maxsz + 1 + \
166 nfs4_fattr_bitmap_maxsz + \
167 decode_delegation_maxsz)
168#define encode_open_confirm_maxsz \
169 (op_encode_hdr_maxsz + \
170 encode_stateid_maxsz + 1)
171#define decode_open_confirm_maxsz \
172 (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz)
174#define encode_open_downgrade_maxsz \
175 (op_encode_hdr_maxsz + \
176 encode_stateid_maxsz + 1 + \
177 encode_share_access_maxsz)
178#define decode_open_downgrade_maxsz \
179 (op_decode_hdr_maxsz + \
180 decode_stateid_maxsz)
181#define encode_close_maxsz (op_encode_hdr_maxsz + \
182 1 + encode_stateid_maxsz)
183#define decode_close_maxsz (op_decode_hdr_maxsz + \
184 decode_stateid_maxsz)
185#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
186 encode_stateid_maxsz + \
187 encode_attrs_maxsz)
188#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
189 nfs4_fattr_bitmap_maxsz)
190#define encode_read_maxsz (op_encode_hdr_maxsz + \
191 encode_stateid_maxsz + 3)
192#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
193#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
194 2 + encode_verifier_maxsz + 5)
195#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
196 decode_verifier_maxsz)
197#define encode_readlink_maxsz (op_encode_hdr_maxsz)
198#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
199#define encode_write_maxsz (op_encode_hdr_maxsz + \
200 encode_stateid_maxsz + 4)
201#define decode_write_maxsz (op_decode_hdr_maxsz + \
202 2 + decode_verifier_maxsz)
203#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
204#define decode_commit_maxsz (op_decode_hdr_maxsz + \
205 decode_verifier_maxsz)
206#define encode_remove_maxsz (op_encode_hdr_maxsz + \
207 nfs4_name_maxsz)
208#define decode_remove_maxsz (op_decode_hdr_maxsz + \
209 decode_change_info_maxsz)
210#define encode_rename_maxsz (op_encode_hdr_maxsz + \
211 2 * nfs4_name_maxsz)
212#define decode_rename_maxsz (op_decode_hdr_maxsz + \
213 decode_change_info_maxsz + \
214 decode_change_info_maxsz)
215#define encode_link_maxsz (op_encode_hdr_maxsz + \
216 nfs4_name_maxsz)
217#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
218#define encode_lockowner_maxsz (7)
219#define encode_lock_maxsz (op_encode_hdr_maxsz + \
220 7 + \
221 1 + encode_stateid_maxsz + 1 + \
222 encode_lockowner_maxsz)
223#define decode_lock_denied_maxsz \
224 (8 + decode_lockowner_maxsz)
225#define decode_lock_maxsz (op_decode_hdr_maxsz + \
226 decode_lock_denied_maxsz)
227#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
228 encode_lockowner_maxsz)
229#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
230 decode_lock_denied_maxsz)
231#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
232 encode_stateid_maxsz + \
233 4)
234#define decode_locku_maxsz (op_decode_hdr_maxsz + \
235 decode_stateid_maxsz)
236#define encode_release_lockowner_maxsz \
237 (op_encode_hdr_maxsz + \
238 encode_lockowner_maxsz)
239#define decode_release_lockowner_maxsz \
240 (op_decode_hdr_maxsz)
241#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
242#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
243#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
244 1 + nfs4_name_maxsz + \
245 1 + \
246 nfs4_fattr_maxsz)
247#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
248#define encode_create_maxsz (op_encode_hdr_maxsz + \
249 1 + 2 + nfs4_name_maxsz + \
250 encode_attrs_maxsz)
251#define decode_create_maxsz (op_decode_hdr_maxsz + \
252 decode_change_info_maxsz + \
253 nfs4_fattr_bitmap_maxsz)
254#define encode_statfs_maxsz (encode_getattr_maxsz)
255#define decode_statfs_maxsz (decode_getattr_maxsz)
256#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
257#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
258#define encode_getacl_maxsz (encode_getattr_maxsz)
259#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
260 nfs4_fattr_bitmap_maxsz + 1)
261#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
262 encode_stateid_maxsz + 3)
263#define decode_setacl_maxsz (decode_setattr_maxsz)
264#define encode_fs_locations_maxsz \
265 (encode_getattr_maxsz)
266#define decode_fs_locations_maxsz \
267 (0)
268#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
269#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
270
271#if defined(CONFIG_NFS_V4_1)
272#define NFS4_MAX_MACHINE_NAME_LEN (64)
273
274#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
275 encode_verifier_maxsz + \
276 1 /* co_ownerid.len */ + \
277 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
278 1 /* flags */ + \
279 1 /* spa_how */ + \
280 0 /* SP4_NONE (for now) */ + \
281 1 /* implementation id array of size 1 */ + \
282 1 /* nii_domain */ + \
283 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
284 1 /* nii_name */ + \
285 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
286 3 /* nii_date */)
287#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
288 2 /* eir_clientid */ + \
289 1 /* eir_sequenceid */ + \
290 1 /* eir_flags */ + \
291 1 /* spr_how */ + \
292 0 /* SP4_NONE (for now) */ + \
293 2 /* eir_server_owner.so_minor_id */ + \
294 /* eir_server_owner.so_major_id<> */ \
295 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
296 /* eir_server_scope<> */ \
297 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
298 1 /* eir_server_impl_id array length */ + \
299 1 /* nii_domain */ + \
300 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
301 1 /* nii_name */ + \
302 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303 3 /* nii_date */)
304#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
305#define decode_channel_attrs_maxsz (6 + \
306 1 /* ca_rdma_ird.len */ + \
307 1 /* ca_rdma_ird */)
308#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
309 2 /* csa_clientid */ + \
310 1 /* csa_sequence */ + \
311 1 /* csa_flags */ + \
312 encode_channel_attrs_maxsz + \
313 encode_channel_attrs_maxsz + \
314 1 /* csa_cb_program */ + \
315 1 /* csa_sec_parms.len (1) */ + \
316 1 /* cb_secflavor (AUTH_SYS) */ + \
317 1 /* stamp */ + \
318 1 /* machinename.len */ + \
319 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
320 1 /* uid */ + \
321 1 /* gid */ + \
322 1 /* gids.len (0) */)
323#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
324 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
325 1 /* csr_sequence */ + \
326 1 /* csr_flags */ + \
327 decode_channel_attrs_maxsz + \
328 decode_channel_attrs_maxsz)
329#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
330 /* bctsa_sessid */ \
331 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
332 1 /* bctsa_dir */ + \
333 1 /* bctsa_use_conn_in_rdma_mode */)
334#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
335 /* bctsr_sessid */ \
336 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
337 1 /* bctsr_dir */ + \
338 1 /* bctsr_use_conn_in_rdma_mode */)
339#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
340#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
341#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
342#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
343#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
344 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
345#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
346 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
347#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
348#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
349#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
350 encode_verifier_maxsz)
351#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
352 2 /* nfs_cookie4 gdlr_cookie */ + \
353 decode_verifier_maxsz \
354 /* verifier4 gdlr_verifier */ + \
355 1 /* gdlr_deviceid_list count */ + \
356 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
357 NFS4_DEVICEID4_SIZE) \
358 /* gdlr_deviceid_list */ + \
359 1 /* bool gdlr_eof */)
360#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
361 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
362#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
363 1 /* layout type */ + \
364 1 /* opaque devaddr4 length */ + \
365 /* devaddr4 payload is read into page */ \
366 1 /* notification bitmap length */ + \
367 1 /* notification bitmap */)
368#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
369 encode_stateid_maxsz)
370#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
371 decode_stateid_maxsz + \
372 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
373#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
374 2 /* offset */ + \
375 2 /* length */ + \
376 1 /* reclaim */ + \
377 encode_stateid_maxsz + \
378 1 /* new offset (true) */ + \
379 2 /* last byte written */ + \
380 1 /* nt_timechanged (false) */ + \
381 1 /* layoutupdate4 layout type */ + \
382 1 /* NULL filelayout layoutupdate4 payload */)
383#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
384#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
385 encode_stateid_maxsz + \
386 1 /* FIXME: opaque lrf_body always empty at the moment */)
387#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
388 1 + decode_stateid_maxsz)
389#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
390#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
391#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
392 XDR_QUADLEN(NFS4_STATEID_SIZE))
393#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
394#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
395 XDR_QUADLEN(NFS4_STATEID_SIZE))
396#define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
397#else /* CONFIG_NFS_V4_1 */
398#define encode_sequence_maxsz 0
399#define decode_sequence_maxsz 0
400#endif /* CONFIG_NFS_V4_1 */
401
402#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
403#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
404#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
405 encode_sequence_maxsz + \
406 encode_putfh_maxsz + \
407 encode_read_maxsz)
408#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
409 decode_sequence_maxsz + \
410 decode_putfh_maxsz + \
411 decode_read_maxsz)
412#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
413 encode_sequence_maxsz + \
414 encode_putfh_maxsz + \
415 encode_readlink_maxsz)
416#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
417 decode_sequence_maxsz + \
418 decode_putfh_maxsz + \
419 decode_readlink_maxsz)
420#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
421 encode_sequence_maxsz + \
422 encode_putfh_maxsz + \
423 encode_readdir_maxsz)
424#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
425 decode_sequence_maxsz + \
426 decode_putfh_maxsz + \
427 decode_readdir_maxsz)
428#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
429 encode_sequence_maxsz + \
430 encode_putfh_maxsz + \
431 encode_write_maxsz + \
432 encode_getattr_maxsz)
433#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_write_maxsz + \
437 decode_getattr_maxsz)
438#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
439 encode_sequence_maxsz + \
440 encode_putfh_maxsz + \
441 encode_commit_maxsz)
442#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
443 decode_sequence_maxsz + \
444 decode_putfh_maxsz + \
445 decode_commit_maxsz)
446#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_open_maxsz + \
450 encode_getfh_maxsz + \
451 encode_getattr_maxsz)
452#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
453 decode_sequence_maxsz + \
454 decode_putfh_maxsz + \
455 decode_open_maxsz + \
456 decode_getfh_maxsz + \
457 decode_getattr_maxsz)
458#define NFS4_enc_open_confirm_sz \
459 (compound_encode_hdr_maxsz + \
460 encode_putfh_maxsz + \
461 encode_open_confirm_maxsz)
462#define NFS4_dec_open_confirm_sz \
463 (compound_decode_hdr_maxsz + \
464 decode_putfh_maxsz + \
465 decode_open_confirm_maxsz)
466#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
467 encode_sequence_maxsz + \
468 encode_putfh_maxsz + \
469 encode_open_maxsz + \
470 encode_getattr_maxsz)
471#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
472 decode_sequence_maxsz + \
473 decode_putfh_maxsz + \
474 decode_open_maxsz + \
475 decode_getattr_maxsz)
476#define NFS4_enc_open_downgrade_sz \
477 (compound_encode_hdr_maxsz + \
478 encode_sequence_maxsz + \
479 encode_putfh_maxsz + \
480 encode_open_downgrade_maxsz + \
481 encode_getattr_maxsz)
482#define NFS4_dec_open_downgrade_sz \
483 (compound_decode_hdr_maxsz + \
484 decode_sequence_maxsz + \
485 decode_putfh_maxsz + \
486 decode_open_downgrade_maxsz + \
487 decode_getattr_maxsz)
488#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
489 encode_sequence_maxsz + \
490 encode_putfh_maxsz + \
491 encode_close_maxsz + \
492 encode_getattr_maxsz)
493#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
494 decode_sequence_maxsz + \
495 decode_putfh_maxsz + \
496 decode_close_maxsz + \
497 decode_getattr_maxsz)
498#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
499 encode_sequence_maxsz + \
500 encode_putfh_maxsz + \
501 encode_setattr_maxsz + \
502 encode_getattr_maxsz)
503#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
504 decode_sequence_maxsz + \
505 decode_putfh_maxsz + \
506 decode_setattr_maxsz + \
507 decode_getattr_maxsz)
508#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
509 encode_sequence_maxsz + \
510 encode_putfh_maxsz + \
511 encode_fsinfo_maxsz)
512#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_fsinfo_maxsz)
516#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
517 encode_renew_maxsz)
518#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
519 decode_renew_maxsz)
520#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
521 encode_setclientid_maxsz)
522#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
523 decode_setclientid_maxsz)
524#define NFS4_enc_setclientid_confirm_sz \
525 (compound_encode_hdr_maxsz + \
526 encode_setclientid_confirm_maxsz + \
527 encode_putrootfh_maxsz + \
528 encode_fsinfo_maxsz)
529#define NFS4_dec_setclientid_confirm_sz \
530 (compound_decode_hdr_maxsz + \
531 decode_setclientid_confirm_maxsz + \
532 decode_putrootfh_maxsz + \
533 decode_fsinfo_maxsz)
534#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
535 encode_sequence_maxsz + \
536 encode_putfh_maxsz + \
537 encode_lock_maxsz)
538#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
539 decode_sequence_maxsz + \
540 decode_putfh_maxsz + \
541 decode_lock_maxsz)
542#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
543 encode_sequence_maxsz + \
544 encode_putfh_maxsz + \
545 encode_lockt_maxsz)
546#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
547 decode_sequence_maxsz + \
548 decode_putfh_maxsz + \
549 decode_lockt_maxsz)
550#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
551 encode_sequence_maxsz + \
552 encode_putfh_maxsz + \
553 encode_locku_maxsz)
554#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
555 decode_sequence_maxsz + \
556 decode_putfh_maxsz + \
557 decode_locku_maxsz)
558#define NFS4_enc_release_lockowner_sz \
559 (compound_encode_hdr_maxsz + \
560 encode_lockowner_maxsz)
561#define NFS4_dec_release_lockowner_sz \
562 (compound_decode_hdr_maxsz + \
563 decode_lockowner_maxsz)
564#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
565 encode_sequence_maxsz + \
566 encode_putfh_maxsz + \
567 encode_access_maxsz + \
568 encode_getattr_maxsz)
569#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_access_maxsz + \
573 decode_getattr_maxsz)
574#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
575 encode_sequence_maxsz + \
576 encode_putfh_maxsz + \
577 encode_getattr_maxsz)
578#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
579 decode_sequence_maxsz + \
580 decode_putfh_maxsz + \
581 decode_getattr_maxsz)
582#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
583 encode_sequence_maxsz + \
584 encode_putfh_maxsz + \
585 encode_lookup_maxsz + \
586 encode_getattr_maxsz + \
587 encode_getfh_maxsz)
588#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
589 decode_sequence_maxsz + \
590 decode_putfh_maxsz + \
591 decode_lookup_maxsz + \
592 decode_getattr_maxsz + \
593 decode_getfh_maxsz)
594#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
595 encode_sequence_maxsz + \
596 encode_putrootfh_maxsz + \
597 encode_getattr_maxsz + \
598 encode_getfh_maxsz)
599#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
600 decode_sequence_maxsz + \
601 decode_putrootfh_maxsz + \
602 decode_getattr_maxsz + \
603 decode_getfh_maxsz)
604#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
605 encode_sequence_maxsz + \
606 encode_putfh_maxsz + \
607 encode_remove_maxsz)
608#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
609 decode_sequence_maxsz + \
610 decode_putfh_maxsz + \
611 decode_remove_maxsz)
612#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
613 encode_sequence_maxsz + \
614 encode_putfh_maxsz + \
615 encode_savefh_maxsz + \
616 encode_putfh_maxsz + \
617 encode_rename_maxsz)
618#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
619 decode_sequence_maxsz + \
620 decode_putfh_maxsz + \
621 decode_savefh_maxsz + \
622 decode_putfh_maxsz + \
623 decode_rename_maxsz)
624#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
625 encode_sequence_maxsz + \
626 encode_putfh_maxsz + \
627 encode_savefh_maxsz + \
628 encode_putfh_maxsz + \
629 encode_link_maxsz + \
630 encode_restorefh_maxsz + \
631 encode_getattr_maxsz)
632#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
633 decode_sequence_maxsz + \
634 decode_putfh_maxsz + \
635 decode_savefh_maxsz + \
636 decode_putfh_maxsz + \
637 decode_link_maxsz + \
638 decode_restorefh_maxsz + \
639 decode_getattr_maxsz)
640#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
641 encode_sequence_maxsz + \
642 encode_putfh_maxsz + \
643 encode_symlink_maxsz + \
644 encode_getattr_maxsz + \
645 encode_getfh_maxsz)
646#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
647 decode_sequence_maxsz + \
648 decode_putfh_maxsz + \
649 decode_symlink_maxsz + \
650 decode_getattr_maxsz + \
651 decode_getfh_maxsz)
652#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
653 encode_sequence_maxsz + \
654 encode_putfh_maxsz + \
655 encode_create_maxsz + \
656 encode_getfh_maxsz + \
657 encode_getattr_maxsz)
658#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
659 decode_sequence_maxsz + \
660 decode_putfh_maxsz + \
661 decode_create_maxsz + \
662 decode_getfh_maxsz + \
663 decode_getattr_maxsz)
664#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
665 encode_sequence_maxsz + \
666 encode_putfh_maxsz + \
667 encode_getattr_maxsz)
668#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
669 decode_sequence_maxsz + \
670 decode_putfh_maxsz + \
671 decode_getattr_maxsz)
672#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
673 encode_sequence_maxsz + \
674 encode_putfh_maxsz + \
675 encode_statfs_maxsz)
676#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
677 decode_sequence_maxsz + \
678 decode_putfh_maxsz + \
679 decode_statfs_maxsz)
680#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
681 encode_sequence_maxsz + \
682 encode_putfh_maxsz + \
683 encode_getattr_maxsz)
684#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
685 decode_sequence_maxsz + \
686 decode_putfh_maxsz + \
687 decode_getattr_maxsz)
688#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
689 encode_sequence_maxsz + \
690 encode_putfh_maxsz + \
691 encode_delegreturn_maxsz + \
692 encode_getattr_maxsz)
693#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_delegreturn_maxsz + \
696 decode_getattr_maxsz)
697#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_getacl_maxsz)
701#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_getacl_maxsz)
705#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_setacl_maxsz)
709#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_setacl_maxsz)
713#define NFS4_enc_fs_locations_sz \
714 (compound_encode_hdr_maxsz + \
715 encode_sequence_maxsz + \
716 encode_putfh_maxsz + \
717 encode_lookup_maxsz + \
718 encode_fs_locations_maxsz)
719#define NFS4_dec_fs_locations_sz \
720 (compound_decode_hdr_maxsz + \
721 decode_sequence_maxsz + \
722 decode_putfh_maxsz + \
723 decode_lookup_maxsz + \
724 decode_fs_locations_maxsz)
725#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_secinfo_maxsz)
729#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_secinfo_maxsz)
733#if defined(CONFIG_NFS_V4_1)
734#define NFS4_enc_bind_conn_to_session_sz \
735 (compound_encode_hdr_maxsz + \
736 encode_bind_conn_to_session_maxsz)
737#define NFS4_dec_bind_conn_to_session_sz \
738 (compound_decode_hdr_maxsz + \
739 decode_bind_conn_to_session_maxsz)
740#define NFS4_enc_exchange_id_sz \
741 (compound_encode_hdr_maxsz + \
742 encode_exchange_id_maxsz)
743#define NFS4_dec_exchange_id_sz \
744 (compound_decode_hdr_maxsz + \
745 decode_exchange_id_maxsz)
746#define NFS4_enc_create_session_sz \
747 (compound_encode_hdr_maxsz + \
748 encode_create_session_maxsz)
749#define NFS4_dec_create_session_sz \
750 (compound_decode_hdr_maxsz + \
751 decode_create_session_maxsz)
752#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
753 encode_destroy_session_maxsz)
754#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
755 decode_destroy_session_maxsz)
756#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
757 encode_destroy_clientid_maxsz)
758#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
759 decode_destroy_clientid_maxsz)
760#define NFS4_enc_sequence_sz \
761 (compound_decode_hdr_maxsz + \
762 encode_sequence_maxsz)
763#define NFS4_dec_sequence_sz \
764 (compound_decode_hdr_maxsz + \
765 decode_sequence_maxsz)
766#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
767 encode_sequence_maxsz + \
768 encode_putrootfh_maxsz + \
769 encode_fsinfo_maxsz)
770#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
771 decode_sequence_maxsz + \
772 decode_putrootfh_maxsz + \
773 decode_fsinfo_maxsz)
774#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
775 encode_sequence_maxsz + \
776 encode_reclaim_complete_maxsz)
777#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
778 decode_sequence_maxsz + \
779 decode_reclaim_complete_maxsz)
780#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
781 encode_sequence_maxsz + \
782 encode_putfh_maxsz + \
783 encode_getdevicelist_maxsz)
784#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
785 decode_sequence_maxsz + \
786 decode_putfh_maxsz + \
787 decode_getdevicelist_maxsz)
788#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
789 encode_sequence_maxsz +\
790 encode_getdeviceinfo_maxsz)
791#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
792 decode_sequence_maxsz + \
793 decode_getdeviceinfo_maxsz)
794#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
795 encode_sequence_maxsz + \
796 encode_putfh_maxsz + \
797 encode_layoutget_maxsz)
798#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
799 decode_sequence_maxsz + \
800 decode_putfh_maxsz + \
801 decode_layoutget_maxsz)
802#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
803 encode_sequence_maxsz +\
804 encode_putfh_maxsz + \
805 encode_layoutcommit_maxsz + \
806 encode_getattr_maxsz)
807#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
808 decode_sequence_maxsz + \
809 decode_putfh_maxsz + \
810 decode_layoutcommit_maxsz + \
811 decode_getattr_maxsz)
812#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
813 encode_sequence_maxsz + \
814 encode_putfh_maxsz + \
815 encode_layoutreturn_maxsz)
816#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
817 decode_sequence_maxsz + \
818 decode_putfh_maxsz + \
819 decode_layoutreturn_maxsz)
820#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
821 encode_sequence_maxsz + \
822 encode_putrootfh_maxsz +\
823 encode_secinfo_no_name_maxsz)
824#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_putrootfh_maxsz + \
827 decode_secinfo_no_name_maxsz)
828#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz + \
830 encode_test_stateid_maxsz)
831#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
832 decode_sequence_maxsz + \
833 decode_test_stateid_maxsz)
834#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
835 encode_sequence_maxsz + \
836 encode_free_stateid_maxsz)
837#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
838 decode_sequence_maxsz + \
839 decode_free_stateid_maxsz)
840
841const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
842 compound_encode_hdr_maxsz +
843 encode_sequence_maxsz +
844 encode_putfh_maxsz +
845 encode_getattr_maxsz) *
846 XDR_UNIT);
847
848const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
849 compound_decode_hdr_maxsz +
850 decode_sequence_maxsz +
851 decode_putfh_maxsz) *
852 XDR_UNIT);
853#endif /* CONFIG_NFS_V4_1 */
854
855static unsigned short send_implementation_id = 1;
856
857module_param(send_implementation_id, ushort, 0644);
858MODULE_PARM_DESC(send_implementation_id,
859 "Send implementation ID with NFSv4.1 exchange_id");
860
861static const umode_t nfs_type2fmt[] = {
862 [NF4BAD] = 0,
863 [NF4REG] = S_IFREG,
864 [NF4DIR] = S_IFDIR,
865 [NF4BLK] = S_IFBLK,
866 [NF4CHR] = S_IFCHR,
867 [NF4LNK] = S_IFLNK,
868 [NF4SOCK] = S_IFSOCK,
869 [NF4FIFO] = S_IFIFO,
870 [NF4ATTRDIR] = 0,
871 [NF4NAMEDATTR] = 0,
872};
873
874struct compound_hdr {
875 int32_t status;
876 uint32_t nops;
877 __be32 * nops_p;
878 uint32_t taglen;
879 char * tag;
880 uint32_t replen; /* expected reply words */
881 u32 minorversion;
882};
883
884static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
885{
886 __be32 *p = xdr_reserve_space(xdr, nbytes);
887 BUG_ON(!p);
888 return p;
889}
890
891static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
892{
893 __be32 *p;
894
895 p = xdr_reserve_space(xdr, len);
896 xdr_encode_opaque_fixed(p, buf, len);
897}
898
899static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
900{
901 __be32 *p;
902
903 p = reserve_space(xdr, 4 + len);
904 xdr_encode_opaque(p, str, len);
905}
906
907static void encode_uint32(struct xdr_stream *xdr, u32 n)
908{
909 __be32 *p;
910
911 p = reserve_space(xdr, 4);
912 *p = cpu_to_be32(n);
913}
914
915static void encode_uint64(struct xdr_stream *xdr, u64 n)
916{
917 __be32 *p;
918
919 p = reserve_space(xdr, 8);
920 xdr_encode_hyper(p, n);
921}
922
923static void encode_nfs4_seqid(struct xdr_stream *xdr,
924 const struct nfs_seqid *seqid)
925{
926 encode_uint32(xdr, seqid->sequence->counter);
927}
928
929static void encode_compound_hdr(struct xdr_stream *xdr,
930 struct rpc_rqst *req,
931 struct compound_hdr *hdr)
932{
933 __be32 *p;
934 struct rpc_auth *auth = req->rq_cred->cr_auth;
935
936 /* initialize running count of expected bytes in reply.
937 * NOTE: the replied tag SHOULD be the same is the one sent,
938 * but this is not required as a MUST for the server to do so. */
939 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
940
941 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
942 encode_string(xdr, hdr->taglen, hdr->tag);
943 p = reserve_space(xdr, 8);
944 *p++ = cpu_to_be32(hdr->minorversion);
945 hdr->nops_p = p;
946 *p = cpu_to_be32(hdr->nops);
947}
948
949static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
950 uint32_t replen,
951 struct compound_hdr *hdr)
952{
953 encode_uint32(xdr, op);
954 hdr->nops++;
955 hdr->replen += replen;
956}
957
958static void encode_nops(struct compound_hdr *hdr)
959{
960 BUG_ON(hdr->nops > NFS4_MAX_OPS);
961 *hdr->nops_p = htonl(hdr->nops);
962}
963
964static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
965{
966 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
967}
968
969static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
970{
971 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
972}
973
974static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
975{
976 char owner_name[IDMAP_NAMESZ];
977 char owner_group[IDMAP_NAMESZ];
978 int owner_namelen = 0;
979 int owner_grouplen = 0;
980 __be32 *p;
981 __be32 *q;
982 int len;
983 uint32_t bmval0 = 0;
984 uint32_t bmval1 = 0;
985
986 /*
987 * We reserve enough space to write the entire attribute buffer at once.
988 * In the worst-case, this would be
989 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
990 * = 36 bytes, plus any contribution from variable-length fields
991 * such as owner/group.
992 */
993 len = 16;
994
995 /* Sigh */
996 if (iap->ia_valid & ATTR_SIZE)
997 len += 8;
998 if (iap->ia_valid & ATTR_MODE)
999 len += 4;
1000 if (iap->ia_valid & ATTR_UID) {
1001 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1002 if (owner_namelen < 0) {
1003 dprintk("nfs: couldn't resolve uid %d to string\n",
1004 iap->ia_uid);
1005 /* XXX */
1006 strcpy(owner_name, "nobody");
1007 owner_namelen = sizeof("nobody") - 1;
1008 /* goto out; */
1009 }
1010 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1011 }
1012 if (iap->ia_valid & ATTR_GID) {
1013 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1014 if (owner_grouplen < 0) {
1015 dprintk("nfs: couldn't resolve gid %d to string\n",
1016 iap->ia_gid);
1017 strcpy(owner_group, "nobody");
1018 owner_grouplen = sizeof("nobody") - 1;
1019 /* goto out; */
1020 }
1021 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1022 }
1023 if (iap->ia_valid & ATTR_ATIME_SET)
1024 len += 16;
1025 else if (iap->ia_valid & ATTR_ATIME)
1026 len += 4;
1027 if (iap->ia_valid & ATTR_MTIME_SET)
1028 len += 16;
1029 else if (iap->ia_valid & ATTR_MTIME)
1030 len += 4;
1031 p = reserve_space(xdr, len);
1032
1033 /*
1034 * We write the bitmap length now, but leave the bitmap and the attribute
1035 * buffer length to be backfilled at the end of this routine.
1036 */
1037 *p++ = cpu_to_be32(2);
1038 q = p;
1039 p += 3;
1040
1041 if (iap->ia_valid & ATTR_SIZE) {
1042 bmval0 |= FATTR4_WORD0_SIZE;
1043 p = xdr_encode_hyper(p, iap->ia_size);
1044 }
1045 if (iap->ia_valid & ATTR_MODE) {
1046 bmval1 |= FATTR4_WORD1_MODE;
1047 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1048 }
1049 if (iap->ia_valid & ATTR_UID) {
1050 bmval1 |= FATTR4_WORD1_OWNER;
1051 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1052 }
1053 if (iap->ia_valid & ATTR_GID) {
1054 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1055 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1056 }
1057 if (iap->ia_valid & ATTR_ATIME_SET) {
1058 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1059 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1060 *p++ = cpu_to_be32(0);
1061 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1062 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1063 }
1064 else if (iap->ia_valid & ATTR_ATIME) {
1065 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1066 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1067 }
1068 if (iap->ia_valid & ATTR_MTIME_SET) {
1069 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1070 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1071 *p++ = cpu_to_be32(0);
1072 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1073 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1074 }
1075 else if (iap->ia_valid & ATTR_MTIME) {
1076 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1077 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1078 }
1079
1080 /*
1081 * Now we backfill the bitmap and the attribute buffer length.
1082 */
1083 if (len != ((char *)p - (char *)q) + 4) {
1084 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1085 len, ((char *)p - (char *)q) + 4);
1086 BUG();
1087 }
1088 len = (char *)p - (char *)q - 12;
1089 *q++ = htonl(bmval0);
1090 *q++ = htonl(bmval1);
1091 *q = htonl(len);
1092
1093/* out: */
1094}
1095
1096static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1097{
1098 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1099 encode_uint32(xdr, access);
1100}
1101
1102static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1103{
1104 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1105 encode_nfs4_seqid(xdr, arg->seqid);
1106 encode_nfs4_stateid(xdr, arg->stateid);
1107}
1108
1109static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1110{
1111 __be32 *p;
1112
1113 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1114 p = reserve_space(xdr, 12);
1115 p = xdr_encode_hyper(p, args->offset);
1116 *p = cpu_to_be32(args->count);
1117}
1118
1119static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1120{
1121 __be32 *p;
1122
1123 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1124 encode_uint32(xdr, create->ftype);
1125
1126 switch (create->ftype) {
1127 case NF4LNK:
1128 p = reserve_space(xdr, 4);
1129 *p = cpu_to_be32(create->u.symlink.len);
1130 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1131 break;
1132
1133 case NF4BLK: case NF4CHR:
1134 p = reserve_space(xdr, 8);
1135 *p++ = cpu_to_be32(create->u.device.specdata1);
1136 *p = cpu_to_be32(create->u.device.specdata2);
1137 break;
1138
1139 default:
1140 break;
1141 }
1142
1143 encode_string(xdr, create->name->len, create->name->name);
1144 encode_attrs(xdr, create->attrs, create->server);
1145}
1146
1147static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1148{
1149 __be32 *p;
1150
1151 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1152 p = reserve_space(xdr, 8);
1153 *p++ = cpu_to_be32(1);
1154 *p = cpu_to_be32(bitmap);
1155}
1156
1157static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1158{
1159 __be32 *p;
1160
1161 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1162 p = reserve_space(xdr, 12);
1163 *p++ = cpu_to_be32(2);
1164 *p++ = cpu_to_be32(bm0);
1165 *p = cpu_to_be32(bm1);
1166}
1167
1168static void
1169encode_getattr_three(struct xdr_stream *xdr,
1170 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1171 struct compound_hdr *hdr)
1172{
1173 __be32 *p;
1174
1175 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1176 if (bm2) {
1177 p = reserve_space(xdr, 16);
1178 *p++ = cpu_to_be32(3);
1179 *p++ = cpu_to_be32(bm0);
1180 *p++ = cpu_to_be32(bm1);
1181 *p = cpu_to_be32(bm2);
1182 } else if (bm1) {
1183 p = reserve_space(xdr, 12);
1184 *p++ = cpu_to_be32(2);
1185 *p++ = cpu_to_be32(bm0);
1186 *p = cpu_to_be32(bm1);
1187 } else {
1188 p = reserve_space(xdr, 8);
1189 *p++ = cpu_to_be32(1);
1190 *p = cpu_to_be32(bm0);
1191 }
1192}
1193
1194static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1195{
1196 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1197 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1198}
1199
1200static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1201 const u32 *open_bitmap,
1202 struct compound_hdr *hdr)
1203{
1204 encode_getattr_three(xdr,
1205 bitmask[0] & open_bitmap[0],
1206 bitmask[1] & open_bitmap[1],
1207 bitmask[2] & open_bitmap[2],
1208 hdr);
1209}
1210
1211static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1212{
1213 encode_getattr_three(xdr,
1214 bitmask[0] & nfs4_fsinfo_bitmap[0],
1215 bitmask[1] & nfs4_fsinfo_bitmap[1],
1216 bitmask[2] & nfs4_fsinfo_bitmap[2],
1217 hdr);
1218}
1219
1220static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1221{
1222 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1223 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1224}
1225
1226static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1227{
1228 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1229}
1230
1231static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1232{
1233 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1234 encode_string(xdr, name->len, name->name);
1235}
1236
1237static inline int nfs4_lock_type(struct file_lock *fl, int block)
1238{
1239 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1240 return block ? NFS4_READW_LT : NFS4_READ_LT;
1241 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1242}
1243
1244static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1245{
1246 if (fl->fl_end == OFFSET_MAX)
1247 return ~(uint64_t)0;
1248 return fl->fl_end - fl->fl_start + 1;
1249}
1250
1251static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1252{
1253 __be32 *p;
1254
1255 p = reserve_space(xdr, 32);
1256 p = xdr_encode_hyper(p, lowner->clientid);
1257 *p++ = cpu_to_be32(20);
1258 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1259 *p++ = cpu_to_be32(lowner->s_dev);
1260 xdr_encode_hyper(p, lowner->id);
1261}
1262
1263/*
1264 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1265 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1266 */
1267static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1268{
1269 __be32 *p;
1270
1271 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1272 p = reserve_space(xdr, 28);
1273 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1274 *p++ = cpu_to_be32(args->reclaim);
1275 p = xdr_encode_hyper(p, args->fl->fl_start);
1276 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1277 *p = cpu_to_be32(args->new_lock_owner);
1278 if (args->new_lock_owner){
1279 encode_nfs4_seqid(xdr, args->open_seqid);
1280 encode_nfs4_stateid(xdr, args->open_stateid);
1281 encode_nfs4_seqid(xdr, args->lock_seqid);
1282 encode_lockowner(xdr, &args->lock_owner);
1283 }
1284 else {
1285 encode_nfs4_stateid(xdr, args->lock_stateid);
1286 encode_nfs4_seqid(xdr, args->lock_seqid);
1287 }
1288}
1289
1290static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1291{
1292 __be32 *p;
1293
1294 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1295 p = reserve_space(xdr, 20);
1296 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1297 p = xdr_encode_hyper(p, args->fl->fl_start);
1298 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 encode_lockowner(xdr, &args->lock_owner);
1300}
1301
1302static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1303{
1304 __be32 *p;
1305
1306 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1307 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1308 encode_nfs4_seqid(xdr, args->seqid);
1309 encode_nfs4_stateid(xdr, args->stateid);
1310 p = reserve_space(xdr, 16);
1311 p = xdr_encode_hyper(p, args->fl->fl_start);
1312 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1313}
1314
1315static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1316{
1317 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1318 encode_lockowner(xdr, lowner);
1319}
1320
1321static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1322{
1323 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1324 encode_string(xdr, name->len, name->name);
1325}
1326
1327static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1328{
1329 __be32 *p;
1330
1331 p = reserve_space(xdr, 8);
1332 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1333 case FMODE_READ:
1334 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1335 break;
1336 case FMODE_WRITE:
1337 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1338 break;
1339 case FMODE_READ|FMODE_WRITE:
1340 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1341 break;
1342 default:
1343 *p++ = cpu_to_be32(0);
1344 }
1345 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1346}
1347
1348static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1349{
1350 __be32 *p;
1351 /*
1352 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1353 * owner 4 = 32
1354 */
1355 encode_nfs4_seqid(xdr, arg->seqid);
1356 encode_share_access(xdr, arg->fmode);
1357 p = reserve_space(xdr, 36);
1358 p = xdr_encode_hyper(p, arg->clientid);
1359 *p++ = cpu_to_be32(24);
1360 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1361 *p++ = cpu_to_be32(arg->server->s_dev);
1362 *p++ = cpu_to_be32(arg->id.uniquifier);
1363 xdr_encode_hyper(p, arg->id.create_time);
1364}
1365
1366static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1367{
1368 __be32 *p;
1369 struct nfs_client *clp;
1370
1371 p = reserve_space(xdr, 4);
1372 switch(arg->open_flags & O_EXCL) {
1373 case 0:
1374 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1375 encode_attrs(xdr, arg->u.attrs, arg->server);
1376 break;
1377 default:
1378 clp = arg->server->nfs_client;
1379 if (clp->cl_mvops->minor_version > 0) {
1380 if (nfs4_has_persistent_session(clp)) {
1381 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1382 encode_attrs(xdr, arg->u.attrs, arg->server);
1383 } else {
1384 struct iattr dummy;
1385
1386 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1387 encode_nfs4_verifier(xdr, &arg->u.verifier);
1388 dummy.ia_valid = 0;
1389 encode_attrs(xdr, &dummy, arg->server);
1390 }
1391 } else {
1392 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1393 encode_nfs4_verifier(xdr, &arg->u.verifier);
1394 }
1395 }
1396}
1397
1398static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399{
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 switch (arg->open_flags & O_CREAT) {
1404 case 0:
1405 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1406 break;
1407 default:
1408 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1409 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410 encode_createmode(xdr, arg);
1411 }
1412}
1413
1414static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415{
1416 __be32 *p;
1417
1418 p = reserve_space(xdr, 4);
1419 switch (delegation_type) {
1420 case 0:
1421 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422 break;
1423 case FMODE_READ:
1424 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425 break;
1426 case FMODE_WRITE|FMODE_READ:
1427 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428 break;
1429 default:
1430 BUG();
1431 }
1432}
1433
1434static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435{
1436 __be32 *p;
1437
1438 p = reserve_space(xdr, 4);
1439 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440 encode_string(xdr, name->len, name->name);
1441}
1442
1443static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444{
1445 __be32 *p;
1446
1447 p = reserve_space(xdr, 4);
1448 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449 encode_delegation_type(xdr, type);
1450}
1451
1452static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453{
1454 __be32 *p;
1455
1456 p = reserve_space(xdr, 4);
1457 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458 encode_nfs4_stateid(xdr, stateid);
1459 encode_string(xdr, name->len, name->name);
1460}
1461
1462static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1463{
1464 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1465 encode_openhdr(xdr, arg);
1466 encode_opentype(xdr, arg);
1467 switch (arg->claim) {
1468 case NFS4_OPEN_CLAIM_NULL:
1469 encode_claim_null(xdr, arg->name);
1470 break;
1471 case NFS4_OPEN_CLAIM_PREVIOUS:
1472 encode_claim_previous(xdr, arg->u.delegation_type);
1473 break;
1474 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1475 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1476 break;
1477 default:
1478 BUG();
1479 }
1480}
1481
1482static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1483{
1484 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1485 encode_nfs4_stateid(xdr, arg->stateid);
1486 encode_nfs4_seqid(xdr, arg->seqid);
1487}
1488
1489static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1490{
1491 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1492 encode_nfs4_stateid(xdr, arg->stateid);
1493 encode_nfs4_seqid(xdr, arg->seqid);
1494 encode_share_access(xdr, arg->fmode);
1495}
1496
1497static void
1498encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1499{
1500 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1501 encode_string(xdr, fh->size, fh->data);
1502}
1503
1504static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1505{
1506 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1507}
1508
1509static void encode_open_stateid(struct xdr_stream *xdr,
1510 const struct nfs_open_context *ctx,
1511 const struct nfs_lock_context *l_ctx,
1512 fmode_t fmode,
1513 int zero_seqid)
1514{
1515 nfs4_stateid stateid;
1516
1517 if (ctx->state != NULL) {
1518 nfs4_select_rw_stateid(&stateid, ctx->state,
1519 fmode, l_ctx->lockowner, l_ctx->pid);
1520 if (zero_seqid)
1521 stateid.seqid = 0;
1522 encode_nfs4_stateid(xdr, &stateid);
1523 } else
1524 encode_nfs4_stateid(xdr, &zero_stateid);
1525}
1526
1527static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1528{
1529 __be32 *p;
1530
1531 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1532 encode_open_stateid(xdr, args->context, args->lock_context,
1533 FMODE_READ, hdr->minorversion);
1534
1535 p = reserve_space(xdr, 12);
1536 p = xdr_encode_hyper(p, args->offset);
1537 *p = cpu_to_be32(args->count);
1538}
1539
1540static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1541{
1542 uint32_t attrs[2] = {
1543 FATTR4_WORD0_RDATTR_ERROR,
1544 FATTR4_WORD1_MOUNTED_ON_FILEID,
1545 };
1546 uint32_t dircount = readdir->count >> 1;
1547 __be32 *p, verf[2];
1548
1549 if (readdir->plus) {
1550 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1551 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1552 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1553 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1554 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1555 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1556 dircount >>= 1;
1557 }
1558 /* Use mounted_on_fileid only if the server supports it */
1559 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1560 attrs[0] |= FATTR4_WORD0_FILEID;
1561
1562 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1563 encode_uint64(xdr, readdir->cookie);
1564 encode_nfs4_verifier(xdr, &readdir->verifier);
1565 p = reserve_space(xdr, 20);
1566 *p++ = cpu_to_be32(dircount);
1567 *p++ = cpu_to_be32(readdir->count);
1568 *p++ = cpu_to_be32(2);
1569
1570 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1571 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1572 memcpy(verf, readdir->verifier.data, sizeof(verf));
1573 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1574 __func__,
1575 (unsigned long long)readdir->cookie,
1576 verf[0], verf[1],
1577 attrs[0] & readdir->bitmask[0],
1578 attrs[1] & readdir->bitmask[1]);
1579}
1580
1581static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1582{
1583 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1584}
1585
1586static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1587{
1588 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1589 encode_string(xdr, name->len, name->name);
1590}
1591
1592static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1593{
1594 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1595 encode_string(xdr, oldname->len, oldname->name);
1596 encode_string(xdr, newname->len, newname->name);
1597}
1598
1599static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1600 struct compound_hdr *hdr)
1601{
1602 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1603 encode_uint64(xdr, clid);
1604}
1605
1606static void
1607encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1608{
1609 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1610}
1611
1612static void
1613encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1614{
1615 __be32 *p;
1616
1617 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1618 encode_nfs4_stateid(xdr, &zero_stateid);
1619 p = reserve_space(xdr, 2*4);
1620 *p++ = cpu_to_be32(1);
1621 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1622 BUG_ON(arg->acl_len % 4);
1623 p = reserve_space(xdr, 4);
1624 *p = cpu_to_be32(arg->acl_len);
1625 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1626}
1627
1628static void
1629encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1630{
1631 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1632}
1633
1634static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1635{
1636 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1637 encode_nfs4_stateid(xdr, &arg->stateid);
1638 encode_attrs(xdr, arg->iap, server);
1639}
1640
1641static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1642{
1643 __be32 *p;
1644
1645 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1646 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1647
1648 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1649 p = reserve_space(xdr, 4);
1650 *p = cpu_to_be32(setclientid->sc_prog);
1651 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1652 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1653 p = reserve_space(xdr, 4);
1654 *p = cpu_to_be32(setclientid->sc_cb_ident);
1655}
1656
1657static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1658{
1659 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1660 decode_setclientid_confirm_maxsz, hdr);
1661 encode_uint64(xdr, arg->clientid);
1662 encode_nfs4_verifier(xdr, &arg->confirm);
1663}
1664
1665static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1666{
1667 __be32 *p;
1668
1669 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1670 encode_open_stateid(xdr, args->context, args->lock_context,
1671 FMODE_WRITE, hdr->minorversion);
1672
1673 p = reserve_space(xdr, 16);
1674 p = xdr_encode_hyper(p, args->offset);
1675 *p++ = cpu_to_be32(args->stable);
1676 *p = cpu_to_be32(args->count);
1677
1678 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1679}
1680
1681static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1682{
1683 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1684 encode_nfs4_stateid(xdr, stateid);
1685}
1686
1687static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1688{
1689 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1690 encode_string(xdr, name->len, name->name);
1691}
1692
1693#if defined(CONFIG_NFS_V4_1)
1694/* NFSv4.1 operations */
1695static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1696 struct nfs4_session *session,
1697 struct compound_hdr *hdr)
1698{
1699 __be32 *p;
1700
1701 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1702 decode_bind_conn_to_session_maxsz, hdr);
1703 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1704 p = xdr_reserve_space(xdr, 8);
1705 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1706 *p = 0; /* use_conn_in_rdma_mode = False */
1707}
1708
1709static void encode_exchange_id(struct xdr_stream *xdr,
1710 struct nfs41_exchange_id_args *args,
1711 struct compound_hdr *hdr)
1712{
1713 __be32 *p;
1714 char impl_name[NFS4_OPAQUE_LIMIT];
1715 int len = 0;
1716
1717 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1718 encode_nfs4_verifier(xdr, args->verifier);
1719
1720 encode_string(xdr, args->id_len, args->id);
1721
1722 p = reserve_space(xdr, 12);
1723 *p++ = cpu_to_be32(args->flags);
1724 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1725
1726 if (send_implementation_id &&
1727 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1728 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1729 <= NFS4_OPAQUE_LIMIT + 1)
1730 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1731 utsname()->sysname, utsname()->release,
1732 utsname()->version, utsname()->machine);
1733
1734 if (len > 0) {
1735 *p = cpu_to_be32(1); /* implementation id array length=1 */
1736
1737 encode_string(xdr,
1738 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1739 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1740 encode_string(xdr, len, impl_name);
1741 /* just send zeros for nii_date - the date is in nii_name */
1742 p = reserve_space(xdr, 12);
1743 p = xdr_encode_hyper(p, 0);
1744 *p = cpu_to_be32(0);
1745 } else
1746 *p = cpu_to_be32(0); /* implementation id array length=0 */
1747}
1748
1749static void encode_create_session(struct xdr_stream *xdr,
1750 struct nfs41_create_session_args *args,
1751 struct compound_hdr *hdr)
1752{
1753 __be32 *p;
1754 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1755 uint32_t len;
1756 struct nfs_client *clp = args->client;
1757 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1758 u32 max_resp_sz_cached;
1759
1760 /*
1761 * Assumes OPEN is the biggest non-idempotent compound.
1762 * 2 is the verifier.
1763 */
1764 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1765 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1766
1767 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1768 clp->cl_ipaddr);
1769
1770 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1771 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1772 p = xdr_encode_hyper(p, clp->cl_clientid);
1773 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1774 *p++ = cpu_to_be32(args->flags); /*flags */
1775
1776 /* Fore Channel */
1777 *p++ = cpu_to_be32(0); /* header padding size */
1778 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1779 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1780 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1781 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1782 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1783 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1784
1785 /* Back Channel */
1786 *p++ = cpu_to_be32(0); /* header padding size */
1787 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1788 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1789 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1790 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1791 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1792 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1793
1794 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1795 *p++ = cpu_to_be32(1);
1796 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1797
1798 /* authsys_parms rfc1831 */
1799 *p++ = (__be32)nn->boot_time.tv_nsec; /* stamp */
1800 p = xdr_encode_opaque(p, machine_name, len);
1801 *p++ = cpu_to_be32(0); /* UID */
1802 *p++ = cpu_to_be32(0); /* GID */
1803 *p = cpu_to_be32(0); /* No more gids */
1804}
1805
1806static void encode_destroy_session(struct xdr_stream *xdr,
1807 struct nfs4_session *session,
1808 struct compound_hdr *hdr)
1809{
1810 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1811 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1812}
1813
1814static void encode_destroy_clientid(struct xdr_stream *xdr,
1815 uint64_t clientid,
1816 struct compound_hdr *hdr)
1817{
1818 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1819 encode_uint64(xdr, clientid);
1820}
1821
1822static void encode_reclaim_complete(struct xdr_stream *xdr,
1823 struct nfs41_reclaim_complete_args *args,
1824 struct compound_hdr *hdr)
1825{
1826 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1827 encode_uint32(xdr, args->one_fs);
1828}
1829#endif /* CONFIG_NFS_V4_1 */
1830
1831static void encode_sequence(struct xdr_stream *xdr,
1832 const struct nfs4_sequence_args *args,
1833 struct compound_hdr *hdr)
1834{
1835#if defined(CONFIG_NFS_V4_1)
1836 struct nfs4_session *session = args->sa_session;
1837 struct nfs4_slot_table *tp;
1838 struct nfs4_slot *slot;
1839 __be32 *p;
1840
1841 if (!session)
1842 return;
1843
1844 tp = &session->fc_slot_table;
1845
1846 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1847 slot = tp->slots + args->sa_slotid;
1848
1849 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1850
1851 /*
1852 * Sessionid + seqid + slotid + max slotid + cache_this
1853 */
1854 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1855 "max_slotid=%d cache_this=%d\n",
1856 __func__,
1857 ((u32 *)session->sess_id.data)[0],
1858 ((u32 *)session->sess_id.data)[1],
1859 ((u32 *)session->sess_id.data)[2],
1860 ((u32 *)session->sess_id.data)[3],
1861 slot->seq_nr, args->sa_slotid,
1862 tp->highest_used_slotid, args->sa_cache_this);
1863 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1864 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865 *p++ = cpu_to_be32(slot->seq_nr);
1866 *p++ = cpu_to_be32(args->sa_slotid);
1867 *p++ = cpu_to_be32(tp->highest_used_slotid);
1868 *p = cpu_to_be32(args->sa_cache_this);
1869#endif /* CONFIG_NFS_V4_1 */
1870}
1871
1872#ifdef CONFIG_NFS_V4_1
1873static void
1874encode_getdevicelist(struct xdr_stream *xdr,
1875 const struct nfs4_getdevicelist_args *args,
1876 struct compound_hdr *hdr)
1877{
1878 __be32 *p;
1879 nfs4_verifier dummy = {
1880 .data = "dummmmmy",
1881 };
1882
1883 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1884 p = reserve_space(xdr, 16);
1885 *p++ = cpu_to_be32(args->layoutclass);
1886 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1887 xdr_encode_hyper(p, 0ULL); /* cookie */
1888 encode_nfs4_verifier(xdr, &dummy);
1889}
1890
1891static void
1892encode_getdeviceinfo(struct xdr_stream *xdr,
1893 const struct nfs4_getdeviceinfo_args *args,
1894 struct compound_hdr *hdr)
1895{
1896 __be32 *p;
1897
1898 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1899 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1900 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1901 NFS4_DEVICEID4_SIZE);
1902 *p++ = cpu_to_be32(args->pdev->layout_type);
1903 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1904 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1905}
1906
1907static void
1908encode_layoutget(struct xdr_stream *xdr,
1909 const struct nfs4_layoutget_args *args,
1910 struct compound_hdr *hdr)
1911{
1912 __be32 *p;
1913
1914 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1915 p = reserve_space(xdr, 36);
1916 *p++ = cpu_to_be32(0); /* Signal layout available */
1917 *p++ = cpu_to_be32(args->type);
1918 *p++ = cpu_to_be32(args->range.iomode);
1919 p = xdr_encode_hyper(p, args->range.offset);
1920 p = xdr_encode_hyper(p, args->range.length);
1921 p = xdr_encode_hyper(p, args->minlength);
1922 encode_nfs4_stateid(xdr, &args->stateid);
1923 encode_uint32(xdr, args->maxcount);
1924
1925 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1926 __func__,
1927 args->type,
1928 args->range.iomode,
1929 (unsigned long)args->range.offset,
1930 (unsigned long)args->range.length,
1931 args->maxcount);
1932}
1933
1934static int
1935encode_layoutcommit(struct xdr_stream *xdr,
1936 struct inode *inode,
1937 const struct nfs4_layoutcommit_args *args,
1938 struct compound_hdr *hdr)
1939{
1940 __be32 *p;
1941
1942 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1943 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1944
1945 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1946 p = reserve_space(xdr, 20);
1947 /* Only whole file layouts */
1948 p = xdr_encode_hyper(p, 0); /* offset */
1949 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1950 *p = cpu_to_be32(0); /* reclaim */
1951 encode_nfs4_stateid(xdr, &args->stateid);
1952 p = reserve_space(xdr, 20);
1953 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1954 p = xdr_encode_hyper(p, args->lastbytewritten);
1955 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1956 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1957
1958 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1959 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1960 NFS_I(inode)->layout, xdr, args);
1961 else
1962 encode_uint32(xdr, 0); /* no layout-type payload */
1963
1964 return 0;
1965}
1966
1967static void
1968encode_layoutreturn(struct xdr_stream *xdr,
1969 const struct nfs4_layoutreturn_args *args,
1970 struct compound_hdr *hdr)
1971{
1972 __be32 *p;
1973
1974 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1975 p = reserve_space(xdr, 16);
1976 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
1977 *p++ = cpu_to_be32(args->layout_type);
1978 *p++ = cpu_to_be32(IOMODE_ANY);
1979 *p = cpu_to_be32(RETURN_FILE);
1980 p = reserve_space(xdr, 16);
1981 p = xdr_encode_hyper(p, 0);
1982 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1983 spin_lock(&args->inode->i_lock);
1984 encode_nfs4_stateid(xdr, &args->stateid);
1985 spin_unlock(&args->inode->i_lock);
1986 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1987 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1988 NFS_I(args->inode)->layout, xdr, args);
1989 } else
1990 encode_uint32(xdr, 0);
1991}
1992
1993static int
1994encode_secinfo_no_name(struct xdr_stream *xdr,
1995 const struct nfs41_secinfo_no_name_args *args,
1996 struct compound_hdr *hdr)
1997{
1998 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1999 encode_uint32(xdr, args->style);
2000 return 0;
2001}
2002
2003static void encode_test_stateid(struct xdr_stream *xdr,
2004 struct nfs41_test_stateid_args *args,
2005 struct compound_hdr *hdr)
2006{
2007 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2008 encode_uint32(xdr, 1);
2009 encode_nfs4_stateid(xdr, args->stateid);
2010}
2011
2012static void encode_free_stateid(struct xdr_stream *xdr,
2013 struct nfs41_free_stateid_args *args,
2014 struct compound_hdr *hdr)
2015{
2016 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2017 encode_nfs4_stateid(xdr, args->stateid);
2018}
2019#endif /* CONFIG_NFS_V4_1 */
2020
2021/*
2022 * END OF "GENERIC" ENCODE ROUTINES.
2023 */
2024
2025static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2026{
2027#if defined(CONFIG_NFS_V4_1)
2028 if (args->sa_session)
2029 return args->sa_session->clp->cl_mvops->minor_version;
2030#endif /* CONFIG_NFS_V4_1 */
2031 return 0;
2032}
2033
2034/*
2035 * Encode an ACCESS request
2036 */
2037static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2038 const struct nfs4_accessargs *args)
2039{
2040 struct compound_hdr hdr = {
2041 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2042 };
2043
2044 encode_compound_hdr(xdr, req, &hdr);
2045 encode_sequence(xdr, &args->seq_args, &hdr);
2046 encode_putfh(xdr, args->fh, &hdr);
2047 encode_access(xdr, args->access, &hdr);
2048 encode_getfattr(xdr, args->bitmask, &hdr);
2049 encode_nops(&hdr);
2050}
2051
2052/*
2053 * Encode LOOKUP request
2054 */
2055static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2056 const struct nfs4_lookup_arg *args)
2057{
2058 struct compound_hdr hdr = {
2059 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060 };
2061
2062 encode_compound_hdr(xdr, req, &hdr);
2063 encode_sequence(xdr, &args->seq_args, &hdr);
2064 encode_putfh(xdr, args->dir_fh, &hdr);
2065 encode_lookup(xdr, args->name, &hdr);
2066 encode_getfh(xdr, &hdr);
2067 encode_getfattr(xdr, args->bitmask, &hdr);
2068 encode_nops(&hdr);
2069}
2070
2071/*
2072 * Encode LOOKUP_ROOT request
2073 */
2074static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2075 struct xdr_stream *xdr,
2076 const struct nfs4_lookup_root_arg *args)
2077{
2078 struct compound_hdr hdr = {
2079 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080 };
2081
2082 encode_compound_hdr(xdr, req, &hdr);
2083 encode_sequence(xdr, &args->seq_args, &hdr);
2084 encode_putrootfh(xdr, &hdr);
2085 encode_getfh(xdr, &hdr);
2086 encode_getfattr(xdr, args->bitmask, &hdr);
2087 encode_nops(&hdr);
2088}
2089
2090/*
2091 * Encode REMOVE request
2092 */
2093static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2094 const struct nfs_removeargs *args)
2095{
2096 struct compound_hdr hdr = {
2097 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098 };
2099
2100 encode_compound_hdr(xdr, req, &hdr);
2101 encode_sequence(xdr, &args->seq_args, &hdr);
2102 encode_putfh(xdr, args->fh, &hdr);
2103 encode_remove(xdr, &args->name, &hdr);
2104 encode_nops(&hdr);
2105}
2106
2107/*
2108 * Encode RENAME request
2109 */
2110static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2111 const struct nfs_renameargs *args)
2112{
2113 struct compound_hdr hdr = {
2114 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115 };
2116
2117 encode_compound_hdr(xdr, req, &hdr);
2118 encode_sequence(xdr, &args->seq_args, &hdr);
2119 encode_putfh(xdr, args->old_dir, &hdr);
2120 encode_savefh(xdr, &hdr);
2121 encode_putfh(xdr, args->new_dir, &hdr);
2122 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2123 encode_nops(&hdr);
2124}
2125
2126/*
2127 * Encode LINK request
2128 */
2129static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2130 const struct nfs4_link_arg *args)
2131{
2132 struct compound_hdr hdr = {
2133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134 };
2135
2136 encode_compound_hdr(xdr, req, &hdr);
2137 encode_sequence(xdr, &args->seq_args, &hdr);
2138 encode_putfh(xdr, args->fh, &hdr);
2139 encode_savefh(xdr, &hdr);
2140 encode_putfh(xdr, args->dir_fh, &hdr);
2141 encode_link(xdr, args->name, &hdr);
2142 encode_restorefh(xdr, &hdr);
2143 encode_getfattr(xdr, args->bitmask, &hdr);
2144 encode_nops(&hdr);
2145}
2146
2147/*
2148 * Encode CREATE request
2149 */
2150static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2151 const struct nfs4_create_arg *args)
2152{
2153 struct compound_hdr hdr = {
2154 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155 };
2156
2157 encode_compound_hdr(xdr, req, &hdr);
2158 encode_sequence(xdr, &args->seq_args, &hdr);
2159 encode_putfh(xdr, args->dir_fh, &hdr);
2160 encode_create(xdr, args, &hdr);
2161 encode_getfh(xdr, &hdr);
2162 encode_getfattr(xdr, args->bitmask, &hdr);
2163 encode_nops(&hdr);
2164}
2165
2166/*
2167 * Encode SYMLINK request
2168 */
2169static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2170 const struct nfs4_create_arg *args)
2171{
2172 nfs4_xdr_enc_create(req, xdr, args);
2173}
2174
2175/*
2176 * Encode GETATTR request
2177 */
2178static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2179 const struct nfs4_getattr_arg *args)
2180{
2181 struct compound_hdr hdr = {
2182 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183 };
2184
2185 encode_compound_hdr(xdr, req, &hdr);
2186 encode_sequence(xdr, &args->seq_args, &hdr);
2187 encode_putfh(xdr, args->fh, &hdr);
2188 encode_getfattr(xdr, args->bitmask, &hdr);
2189 encode_nops(&hdr);
2190}
2191
2192/*
2193 * Encode a CLOSE request
2194 */
2195static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2196 struct nfs_closeargs *args)
2197{
2198 struct compound_hdr hdr = {
2199 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200 };
2201
2202 encode_compound_hdr(xdr, req, &hdr);
2203 encode_sequence(xdr, &args->seq_args, &hdr);
2204 encode_putfh(xdr, args->fh, &hdr);
2205 encode_close(xdr, args, &hdr);
2206 encode_getfattr(xdr, args->bitmask, &hdr);
2207 encode_nops(&hdr);
2208}
2209
2210/*
2211 * Encode an OPEN request
2212 */
2213static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2214 struct nfs_openargs *args)
2215{
2216 struct compound_hdr hdr = {
2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218 };
2219
2220 encode_compound_hdr(xdr, req, &hdr);
2221 encode_sequence(xdr, &args->seq_args, &hdr);
2222 encode_putfh(xdr, args->fh, &hdr);
2223 encode_open(xdr, args, &hdr);
2224 encode_getfh(xdr, &hdr);
2225 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2226 encode_nops(&hdr);
2227}
2228
2229/*
2230 * Encode an OPEN_CONFIRM request
2231 */
2232static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2233 struct xdr_stream *xdr,
2234 struct nfs_open_confirmargs *args)
2235{
2236 struct compound_hdr hdr = {
2237 .nops = 0,
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_putfh(xdr, args->fh, &hdr);
2242 encode_open_confirm(xdr, args, &hdr);
2243 encode_nops(&hdr);
2244}
2245
2246/*
2247 * Encode an OPEN request with no attributes.
2248 */
2249static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2250 struct xdr_stream *xdr,
2251 struct nfs_openargs *args)
2252{
2253 struct compound_hdr hdr = {
2254 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255 };
2256
2257 encode_compound_hdr(xdr, req, &hdr);
2258 encode_sequence(xdr, &args->seq_args, &hdr);
2259 encode_putfh(xdr, args->fh, &hdr);
2260 encode_open(xdr, args, &hdr);
2261 encode_getfattr(xdr, args->bitmask, &hdr);
2262 encode_nops(&hdr);
2263}
2264
2265/*
2266 * Encode an OPEN_DOWNGRADE request
2267 */
2268static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2269 struct xdr_stream *xdr,
2270 struct nfs_closeargs *args)
2271{
2272 struct compound_hdr hdr = {
2273 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274 };
2275
2276 encode_compound_hdr(xdr, req, &hdr);
2277 encode_sequence(xdr, &args->seq_args, &hdr);
2278 encode_putfh(xdr, args->fh, &hdr);
2279 encode_open_downgrade(xdr, args, &hdr);
2280 encode_getfattr(xdr, args->bitmask, &hdr);
2281 encode_nops(&hdr);
2282}
2283
2284/*
2285 * Encode a LOCK request
2286 */
2287static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2288 struct nfs_lock_args *args)
2289{
2290 struct compound_hdr hdr = {
2291 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2292 };
2293
2294 encode_compound_hdr(xdr, req, &hdr);
2295 encode_sequence(xdr, &args->seq_args, &hdr);
2296 encode_putfh(xdr, args->fh, &hdr);
2297 encode_lock(xdr, args, &hdr);
2298 encode_nops(&hdr);
2299}
2300
2301/*
2302 * Encode a LOCKT request
2303 */
2304static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2305 struct nfs_lockt_args *args)
2306{
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_lockt(xdr, args, &hdr);
2315 encode_nops(&hdr);
2316}
2317
2318/*
2319 * Encode a LOCKU request
2320 */
2321static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2322 struct nfs_locku_args *args)
2323{
2324 struct compound_hdr hdr = {
2325 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326 };
2327
2328 encode_compound_hdr(xdr, req, &hdr);
2329 encode_sequence(xdr, &args->seq_args, &hdr);
2330 encode_putfh(xdr, args->fh, &hdr);
2331 encode_locku(xdr, args, &hdr);
2332 encode_nops(&hdr);
2333}
2334
2335static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2336 struct xdr_stream *xdr,
2337 struct nfs_release_lockowner_args *args)
2338{
2339 struct compound_hdr hdr = {
2340 .minorversion = 0,
2341 };
2342
2343 encode_compound_hdr(xdr, req, &hdr);
2344 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2345 encode_nops(&hdr);
2346}
2347
2348/*
2349 * Encode a READLINK request
2350 */
2351static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2352 const struct nfs4_readlink *args)
2353{
2354 struct compound_hdr hdr = {
2355 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356 };
2357
2358 encode_compound_hdr(xdr, req, &hdr);
2359 encode_sequence(xdr, &args->seq_args, &hdr);
2360 encode_putfh(xdr, args->fh, &hdr);
2361 encode_readlink(xdr, args, req, &hdr);
2362
2363 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2364 args->pgbase, args->pglen);
2365 encode_nops(&hdr);
2366}
2367
2368/*
2369 * Encode a READDIR request
2370 */
2371static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2372 const struct nfs4_readdir_arg *args)
2373{
2374 struct compound_hdr hdr = {
2375 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2376 };
2377
2378 encode_compound_hdr(xdr, req, &hdr);
2379 encode_sequence(xdr, &args->seq_args, &hdr);
2380 encode_putfh(xdr, args->fh, &hdr);
2381 encode_readdir(xdr, args, req, &hdr);
2382
2383 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2384 args->pgbase, args->count);
2385 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2386 __func__, hdr.replen << 2, args->pages,
2387 args->pgbase, args->count);
2388 encode_nops(&hdr);
2389}
2390
2391/*
2392 * Encode a READ request
2393 */
2394static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2395 struct nfs_readargs *args)
2396{
2397 struct compound_hdr hdr = {
2398 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2399 };
2400
2401 encode_compound_hdr(xdr, req, &hdr);
2402 encode_sequence(xdr, &args->seq_args, &hdr);
2403 encode_putfh(xdr, args->fh, &hdr);
2404 encode_read(xdr, args, &hdr);
2405
2406 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2407 args->pages, args->pgbase, args->count);
2408 req->rq_rcv_buf.flags |= XDRBUF_READ;
2409 encode_nops(&hdr);
2410}
2411
2412/*
2413 * Encode an SETATTR request
2414 */
2415static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2416 struct nfs_setattrargs *args)
2417{
2418 struct compound_hdr hdr = {
2419 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2420 };
2421
2422 encode_compound_hdr(xdr, req, &hdr);
2423 encode_sequence(xdr, &args->seq_args, &hdr);
2424 encode_putfh(xdr, args->fh, &hdr);
2425 encode_setattr(xdr, args, args->server, &hdr);
2426 encode_getfattr(xdr, args->bitmask, &hdr);
2427 encode_nops(&hdr);
2428}
2429
2430/*
2431 * Encode a GETACL request
2432 */
2433static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2434 struct nfs_getaclargs *args)
2435{
2436 struct compound_hdr hdr = {
2437 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438 };
2439 uint32_t replen;
2440
2441 encode_compound_hdr(xdr, req, &hdr);
2442 encode_sequence(xdr, &args->seq_args, &hdr);
2443 encode_putfh(xdr, args->fh, &hdr);
2444 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2445 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2446
2447 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2448 args->acl_pages, args->acl_pgbase, args->acl_len);
2449
2450 encode_nops(&hdr);
2451}
2452
2453/*
2454 * Encode a WRITE request
2455 */
2456static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2457 struct nfs_writeargs *args)
2458{
2459 struct compound_hdr hdr = {
2460 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2461 };
2462
2463 encode_compound_hdr(xdr, req, &hdr);
2464 encode_sequence(xdr, &args->seq_args, &hdr);
2465 encode_putfh(xdr, args->fh, &hdr);
2466 encode_write(xdr, args, &hdr);
2467 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2468 if (args->bitmask)
2469 encode_getfattr(xdr, args->bitmask, &hdr);
2470 encode_nops(&hdr);
2471}
2472
2473/*
2474 * a COMMIT request
2475 */
2476static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2477 struct nfs_commitargs *args)
2478{
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_commit(xdr, args, &hdr);
2487 encode_nops(&hdr);
2488}
2489
2490/*
2491 * FSINFO request
2492 */
2493static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2494 struct nfs4_fsinfo_arg *args)
2495{
2496 struct compound_hdr hdr = {
2497 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498 };
2499
2500 encode_compound_hdr(xdr, req, &hdr);
2501 encode_sequence(xdr, &args->seq_args, &hdr);
2502 encode_putfh(xdr, args->fh, &hdr);
2503 encode_fsinfo(xdr, args->bitmask, &hdr);
2504 encode_nops(&hdr);
2505}
2506
2507/*
2508 * a PATHCONF request
2509 */
2510static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2511 const struct nfs4_pathconf_arg *args)
2512{
2513 struct compound_hdr hdr = {
2514 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515 };
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2521 &hdr);
2522 encode_nops(&hdr);
2523}
2524
2525/*
2526 * a STATFS request
2527 */
2528static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2529 const struct nfs4_statfs_arg *args)
2530{
2531 struct compound_hdr hdr = {
2532 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2533 };
2534
2535 encode_compound_hdr(xdr, req, &hdr);
2536 encode_sequence(xdr, &args->seq_args, &hdr);
2537 encode_putfh(xdr, args->fh, &hdr);
2538 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2539 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2540 encode_nops(&hdr);
2541}
2542
2543/*
2544 * GETATTR_BITMAP request
2545 */
2546static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2547 struct xdr_stream *xdr,
2548 struct nfs4_server_caps_arg *args)
2549{
2550 struct compound_hdr hdr = {
2551 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552 };
2553
2554 encode_compound_hdr(xdr, req, &hdr);
2555 encode_sequence(xdr, &args->seq_args, &hdr);
2556 encode_putfh(xdr, args->fhandle, &hdr);
2557 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2558 FATTR4_WORD0_FH_EXPIRE_TYPE|
2559 FATTR4_WORD0_LINK_SUPPORT|
2560 FATTR4_WORD0_SYMLINK_SUPPORT|
2561 FATTR4_WORD0_ACLSUPPORT, &hdr);
2562 encode_nops(&hdr);
2563}
2564
2565/*
2566 * a RENEW request
2567 */
2568static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2569 struct nfs_client *clp)
2570{
2571 struct compound_hdr hdr = {
2572 .nops = 0,
2573 };
2574
2575 encode_compound_hdr(xdr, req, &hdr);
2576 encode_renew(xdr, clp->cl_clientid, &hdr);
2577 encode_nops(&hdr);
2578}
2579
2580/*
2581 * a SETCLIENTID request
2582 */
2583static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2584 struct xdr_stream *xdr,
2585 struct nfs4_setclientid *sc)
2586{
2587 struct compound_hdr hdr = {
2588 .nops = 0,
2589 };
2590
2591 encode_compound_hdr(xdr, req, &hdr);
2592 encode_setclientid(xdr, sc, &hdr);
2593 encode_nops(&hdr);
2594}
2595
2596/*
2597 * a SETCLIENTID_CONFIRM request
2598 */
2599static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2600 struct xdr_stream *xdr,
2601 struct nfs4_setclientid_res *arg)
2602{
2603 struct compound_hdr hdr = {
2604 .nops = 0,
2605 };
2606 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2607
2608 encode_compound_hdr(xdr, req, &hdr);
2609 encode_setclientid_confirm(xdr, arg, &hdr);
2610 encode_putrootfh(xdr, &hdr);
2611 encode_fsinfo(xdr, lease_bitmap, &hdr);
2612 encode_nops(&hdr);
2613}
2614
2615/*
2616 * DELEGRETURN request
2617 */
2618static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2619 struct xdr_stream *xdr,
2620 const struct nfs4_delegreturnargs *args)
2621{
2622 struct compound_hdr hdr = {
2623 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624 };
2625
2626 encode_compound_hdr(xdr, req, &hdr);
2627 encode_sequence(xdr, &args->seq_args, &hdr);
2628 encode_putfh(xdr, args->fhandle, &hdr);
2629 encode_getfattr(xdr, args->bitmask, &hdr);
2630 encode_delegreturn(xdr, args->stateid, &hdr);
2631 encode_nops(&hdr);
2632}
2633
2634/*
2635 * Encode FS_LOCATIONS request
2636 */
2637static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2638 struct xdr_stream *xdr,
2639 struct nfs4_fs_locations_arg *args)
2640{
2641 struct compound_hdr hdr = {
2642 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643 };
2644 uint32_t replen;
2645
2646 encode_compound_hdr(xdr, req, &hdr);
2647 encode_sequence(xdr, &args->seq_args, &hdr);
2648 encode_putfh(xdr, args->dir_fh, &hdr);
2649 encode_lookup(xdr, args->name, &hdr);
2650 replen = hdr.replen; /* get the attribute into args->page */
2651 encode_fs_locations(xdr, args->bitmask, &hdr);
2652
2653 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2654 0, PAGE_SIZE);
2655 encode_nops(&hdr);
2656}
2657
2658/*
2659 * Encode SECINFO request
2660 */
2661static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2662 struct xdr_stream *xdr,
2663 struct nfs4_secinfo_arg *args)
2664{
2665 struct compound_hdr hdr = {
2666 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2667 };
2668
2669 encode_compound_hdr(xdr, req, &hdr);
2670 encode_sequence(xdr, &args->seq_args, &hdr);
2671 encode_putfh(xdr, args->dir_fh, &hdr);
2672 encode_secinfo(xdr, args->name, &hdr);
2673 encode_nops(&hdr);
2674}
2675
2676#if defined(CONFIG_NFS_V4_1)
2677/*
2678 * BIND_CONN_TO_SESSION request
2679 */
2680static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2681 struct xdr_stream *xdr,
2682 struct nfs_client *clp)
2683{
2684 struct compound_hdr hdr = {
2685 .minorversion = clp->cl_mvops->minor_version,
2686 };
2687
2688 encode_compound_hdr(xdr, req, &hdr);
2689 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2690 encode_nops(&hdr);
2691}
2692
2693/*
2694 * EXCHANGE_ID request
2695 */
2696static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2697 struct xdr_stream *xdr,
2698 struct nfs41_exchange_id_args *args)
2699{
2700 struct compound_hdr hdr = {
2701 .minorversion = args->client->cl_mvops->minor_version,
2702 };
2703
2704 encode_compound_hdr(xdr, req, &hdr);
2705 encode_exchange_id(xdr, args, &hdr);
2706 encode_nops(&hdr);
2707}
2708
2709/*
2710 * a CREATE_SESSION request
2711 */
2712static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2713 struct xdr_stream *xdr,
2714 struct nfs41_create_session_args *args)
2715{
2716 struct compound_hdr hdr = {
2717 .minorversion = args->client->cl_mvops->minor_version,
2718 };
2719
2720 encode_compound_hdr(xdr, req, &hdr);
2721 encode_create_session(xdr, args, &hdr);
2722 encode_nops(&hdr);
2723}
2724
2725/*
2726 * a DESTROY_SESSION request
2727 */
2728static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 struct nfs4_session *session)
2731{
2732 struct compound_hdr hdr = {
2733 .minorversion = session->clp->cl_mvops->minor_version,
2734 };
2735
2736 encode_compound_hdr(xdr, req, &hdr);
2737 encode_destroy_session(xdr, session, &hdr);
2738 encode_nops(&hdr);
2739}
2740
2741/*
2742 * a DESTROY_CLIENTID request
2743 */
2744static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2745 struct xdr_stream *xdr,
2746 struct nfs_client *clp)
2747{
2748 struct compound_hdr hdr = {
2749 .minorversion = clp->cl_mvops->minor_version,
2750 };
2751
2752 encode_compound_hdr(xdr, req, &hdr);
2753 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2754 encode_nops(&hdr);
2755}
2756
2757/*
2758 * a SEQUENCE request
2759 */
2760static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2761 struct nfs4_sequence_args *args)
2762{
2763 struct compound_hdr hdr = {
2764 .minorversion = nfs4_xdr_minorversion(args),
2765 };
2766
2767 encode_compound_hdr(xdr, req, &hdr);
2768 encode_sequence(xdr, args, &hdr);
2769 encode_nops(&hdr);
2770}
2771
2772/*
2773 * a GET_LEASE_TIME request
2774 */
2775static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2776 struct xdr_stream *xdr,
2777 struct nfs4_get_lease_time_args *args)
2778{
2779 struct compound_hdr hdr = {
2780 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2781 };
2782 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2783
2784 encode_compound_hdr(xdr, req, &hdr);
2785 encode_sequence(xdr, &args->la_seq_args, &hdr);
2786 encode_putrootfh(xdr, &hdr);
2787 encode_fsinfo(xdr, lease_bitmap, &hdr);
2788 encode_nops(&hdr);
2789}
2790
2791/*
2792 * a RECLAIM_COMPLETE request
2793 */
2794static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2795 struct xdr_stream *xdr,
2796 struct nfs41_reclaim_complete_args *args)
2797{
2798 struct compound_hdr hdr = {
2799 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2800 };
2801
2802 encode_compound_hdr(xdr, req, &hdr);
2803 encode_sequence(xdr, &args->seq_args, &hdr);
2804 encode_reclaim_complete(xdr, args, &hdr);
2805 encode_nops(&hdr);
2806}
2807
2808/*
2809 * Encode GETDEVICELIST request
2810 */
2811static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2812 struct xdr_stream *xdr,
2813 struct nfs4_getdevicelist_args *args)
2814{
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_getdevicelist(xdr, args, &hdr);
2823 encode_nops(&hdr);
2824}
2825
2826/*
2827 * Encode GETDEVICEINFO request
2828 */
2829static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2830 struct xdr_stream *xdr,
2831 struct nfs4_getdeviceinfo_args *args)
2832{
2833 struct compound_hdr hdr = {
2834 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2835 };
2836
2837 encode_compound_hdr(xdr, req, &hdr);
2838 encode_sequence(xdr, &args->seq_args, &hdr);
2839 encode_getdeviceinfo(xdr, args, &hdr);
2840
2841 /* set up reply kvec. Subtract notification bitmap max size (2)
2842 * so that notification bitmap is put in xdr_buf tail */
2843 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2844 args->pdev->pages, args->pdev->pgbase,
2845 args->pdev->pglen);
2846
2847 encode_nops(&hdr);
2848}
2849
2850/*
2851 * Encode LAYOUTGET request
2852 */
2853static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2854 struct xdr_stream *xdr,
2855 struct nfs4_layoutget_args *args)
2856{
2857 struct compound_hdr hdr = {
2858 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859 };
2860
2861 encode_compound_hdr(xdr, req, &hdr);
2862 encode_sequence(xdr, &args->seq_args, &hdr);
2863 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2864 encode_layoutget(xdr, args, &hdr);
2865
2866 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2867 args->layout.pages, 0, args->layout.pglen);
2868
2869 encode_nops(&hdr);
2870}
2871
2872/*
2873 * Encode LAYOUTCOMMIT request
2874 */
2875static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2876 struct xdr_stream *xdr,
2877 struct nfs4_layoutcommit_args *args)
2878{
2879 struct nfs4_layoutcommit_data *data =
2880 container_of(args, struct nfs4_layoutcommit_data, args);
2881 struct compound_hdr hdr = {
2882 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883 };
2884
2885 encode_compound_hdr(xdr, req, &hdr);
2886 encode_sequence(xdr, &args->seq_args, &hdr);
2887 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2888 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2889 encode_getfattr(xdr, args->bitmask, &hdr);
2890 encode_nops(&hdr);
2891}
2892
2893/*
2894 * Encode LAYOUTRETURN request
2895 */
2896static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2897 struct xdr_stream *xdr,
2898 struct nfs4_layoutreturn_args *args)
2899{
2900 struct compound_hdr hdr = {
2901 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_sequence(xdr, &args->seq_args, &hdr);
2906 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2907 encode_layoutreturn(xdr, args, &hdr);
2908 encode_nops(&hdr);
2909}
2910
2911/*
2912 * Encode SECINFO_NO_NAME request
2913 */
2914static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2915 struct xdr_stream *xdr,
2916 struct nfs41_secinfo_no_name_args *args)
2917{
2918 struct compound_hdr hdr = {
2919 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920 };
2921
2922 encode_compound_hdr(xdr, req, &hdr);
2923 encode_sequence(xdr, &args->seq_args, &hdr);
2924 encode_putrootfh(xdr, &hdr);
2925 encode_secinfo_no_name(xdr, args, &hdr);
2926 encode_nops(&hdr);
2927 return 0;
2928}
2929
2930/*
2931 * Encode TEST_STATEID request
2932 */
2933static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2934 struct xdr_stream *xdr,
2935 struct nfs41_test_stateid_args *args)
2936{
2937 struct compound_hdr hdr = {
2938 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939 };
2940
2941 encode_compound_hdr(xdr, req, &hdr);
2942 encode_sequence(xdr, &args->seq_args, &hdr);
2943 encode_test_stateid(xdr, args, &hdr);
2944 encode_nops(&hdr);
2945}
2946
2947/*
2948 * Encode FREE_STATEID request
2949 */
2950static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2951 struct xdr_stream *xdr,
2952 struct nfs41_free_stateid_args *args)
2953{
2954 struct compound_hdr hdr = {
2955 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2956 };
2957
2958 encode_compound_hdr(xdr, req, &hdr);
2959 encode_sequence(xdr, &args->seq_args, &hdr);
2960 encode_free_stateid(xdr, args, &hdr);
2961 encode_nops(&hdr);
2962}
2963#endif /* CONFIG_NFS_V4_1 */
2964
2965static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2966{
2967 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2968 "Remaining buffer length is %tu words.\n",
2969 func, xdr->end - xdr->p);
2970}
2971
2972static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2973{
2974 __be32 *p;
2975
2976 p = xdr_inline_decode(xdr, 4);
2977 if (unlikely(!p))
2978 goto out_overflow;
2979 *len = be32_to_cpup(p);
2980 p = xdr_inline_decode(xdr, *len);
2981 if (unlikely(!p))
2982 goto out_overflow;
2983 *string = (char *)p;
2984 return 0;
2985out_overflow:
2986 print_overflow_msg(__func__, xdr);
2987 return -EIO;
2988}
2989
2990static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2991{
2992 __be32 *p;
2993
2994 p = xdr_inline_decode(xdr, 8);
2995 if (unlikely(!p))
2996 goto out_overflow;
2997 hdr->status = be32_to_cpup(p++);
2998 hdr->taglen = be32_to_cpup(p);
2999
3000 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3001 if (unlikely(!p))
3002 goto out_overflow;
3003 hdr->tag = (char *)p;
3004 p += XDR_QUADLEN(hdr->taglen);
3005 hdr->nops = be32_to_cpup(p);
3006 if (unlikely(hdr->nops < 1))
3007 return nfs4_stat_to_errno(hdr->status);
3008 return 0;
3009out_overflow:
3010 print_overflow_msg(__func__, xdr);
3011 return -EIO;
3012}
3013
3014static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3015{
3016 __be32 *p;
3017 uint32_t opnum;
3018 int32_t nfserr;
3019
3020 p = xdr_inline_decode(xdr, 8);
3021 if (unlikely(!p))
3022 goto out_overflow;
3023 opnum = be32_to_cpup(p++);
3024 if (opnum != expected) {
3025 dprintk("nfs: Server returned operation"
3026 " %d but we issued a request for %d\n",
3027 opnum, expected);
3028 return -EIO;
3029 }
3030 nfserr = be32_to_cpup(p);
3031 if (nfserr != NFS_OK)
3032 return nfs4_stat_to_errno(nfserr);
3033 return 0;
3034out_overflow:
3035 print_overflow_msg(__func__, xdr);
3036 return -EIO;
3037}
3038
3039/* Dummy routine */
3040static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3041{
3042 __be32 *p;
3043 unsigned int strlen;
3044 char *str;
3045
3046 p = xdr_inline_decode(xdr, 12);
3047 if (likely(p))
3048 return decode_opaque_inline(xdr, &strlen, &str);
3049 print_overflow_msg(__func__, xdr);
3050 return -EIO;
3051}
3052
3053static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3054{
3055 uint32_t bmlen;
3056 __be32 *p;
3057
3058 p = xdr_inline_decode(xdr, 4);
3059 if (unlikely(!p))
3060 goto out_overflow;
3061 bmlen = be32_to_cpup(p);
3062
3063 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3064 p = xdr_inline_decode(xdr, (bmlen << 2));
3065 if (unlikely(!p))
3066 goto out_overflow;
3067 if (bmlen > 0) {
3068 bitmap[0] = be32_to_cpup(p++);
3069 if (bmlen > 1) {
3070 bitmap[1] = be32_to_cpup(p++);
3071 if (bmlen > 2)
3072 bitmap[2] = be32_to_cpup(p);
3073 }
3074 }
3075 return 0;
3076out_overflow:
3077 print_overflow_msg(__func__, xdr);
3078 return -EIO;
3079}
3080
3081static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3082{
3083 __be32 *p;
3084
3085 p = xdr_inline_decode(xdr, 4);
3086 if (unlikely(!p))
3087 goto out_overflow;
3088 *attrlen = be32_to_cpup(p);
3089 *savep = xdr->p;
3090 return 0;
3091out_overflow:
3092 print_overflow_msg(__func__, xdr);
3093 return -EIO;
3094}
3095
3096static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3097{
3098 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3099 int ret;
3100 ret = decode_attr_bitmap(xdr, bitmask);
3101 if (unlikely(ret < 0))
3102 return ret;
3103 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3104 } else
3105 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3106 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3107 bitmask[0], bitmask[1], bitmask[2]);
3108 return 0;
3109}
3110
3111static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3112{
3113 __be32 *p;
3114 int ret = 0;
3115
3116 *type = 0;
3117 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3118 return -EIO;
3119 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3120 p = xdr_inline_decode(xdr, 4);
3121 if (unlikely(!p))
3122 goto out_overflow;
3123 *type = be32_to_cpup(p);
3124 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3125 dprintk("%s: bad type %d\n", __func__, *type);
3126 return -EIO;
3127 }
3128 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3129 ret = NFS_ATTR_FATTR_TYPE;
3130 }
3131 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3132 return ret;
3133out_overflow:
3134 print_overflow_msg(__func__, xdr);
3135 return -EIO;
3136}
3137
3138static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3139 uint32_t *bitmap, uint32_t *type)
3140{
3141 __be32 *p;
3142
3143 *type = 0;
3144 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3145 return -EIO;
3146 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3147 p = xdr_inline_decode(xdr, 4);
3148 if (unlikely(!p))
3149 goto out_overflow;
3150 *type = be32_to_cpup(p);
3151 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3152 }
3153 dprintk("%s: expire type=0x%x\n", __func__, *type);
3154 return 0;
3155out_overflow:
3156 print_overflow_msg(__func__, xdr);
3157 return -EIO;
3158}
3159
3160static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3161{
3162 __be32 *p;
3163 int ret = 0;
3164
3165 *change = 0;
3166 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3167 return -EIO;
3168 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3169 p = xdr_inline_decode(xdr, 8);
3170 if (unlikely(!p))
3171 goto out_overflow;
3172 xdr_decode_hyper(p, change);
3173 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3174 ret = NFS_ATTR_FATTR_CHANGE;
3175 }
3176 dprintk("%s: change attribute=%Lu\n", __func__,
3177 (unsigned long long)*change);
3178 return ret;
3179out_overflow:
3180 print_overflow_msg(__func__, xdr);
3181 return -EIO;
3182}
3183
3184static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3185{
3186 __be32 *p;
3187 int ret = 0;
3188
3189 *size = 0;
3190 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3191 return -EIO;
3192 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3193 p = xdr_inline_decode(xdr, 8);
3194 if (unlikely(!p))
3195 goto out_overflow;
3196 xdr_decode_hyper(p, size);
3197 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3198 ret = NFS_ATTR_FATTR_SIZE;
3199 }
3200 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3201 return ret;
3202out_overflow:
3203 print_overflow_msg(__func__, xdr);
3204 return -EIO;
3205}
3206
3207static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3208{
3209 __be32 *p;
3210
3211 *res = 0;
3212 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3213 return -EIO;
3214 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3215 p = xdr_inline_decode(xdr, 4);
3216 if (unlikely(!p))
3217 goto out_overflow;
3218 *res = be32_to_cpup(p);
3219 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3220 }
3221 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3222 return 0;
3223out_overflow:
3224 print_overflow_msg(__func__, xdr);
3225 return -EIO;
3226}
3227
3228static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3229{
3230 __be32 *p;
3231
3232 *res = 0;
3233 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3234 return -EIO;
3235 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3236 p = xdr_inline_decode(xdr, 4);
3237 if (unlikely(!p))
3238 goto out_overflow;
3239 *res = be32_to_cpup(p);
3240 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3241 }
3242 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3243 return 0;
3244out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247}
3248
3249static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3250{
3251 __be32 *p;
3252 int ret = 0;
3253
3254 fsid->major = 0;
3255 fsid->minor = 0;
3256 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3257 return -EIO;
3258 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3259 p = xdr_inline_decode(xdr, 16);
3260 if (unlikely(!p))
3261 goto out_overflow;
3262 p = xdr_decode_hyper(p, &fsid->major);
3263 xdr_decode_hyper(p, &fsid->minor);
3264 bitmap[0] &= ~FATTR4_WORD0_FSID;
3265 ret = NFS_ATTR_FATTR_FSID;
3266 }
3267 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3268 (unsigned long long)fsid->major,
3269 (unsigned long long)fsid->minor);
3270 return ret;
3271out_overflow:
3272 print_overflow_msg(__func__, xdr);
3273 return -EIO;
3274}
3275
3276static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3277{
3278 __be32 *p;
3279
3280 *res = 60;
3281 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3282 return -EIO;
3283 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3284 p = xdr_inline_decode(xdr, 4);
3285 if (unlikely(!p))
3286 goto out_overflow;
3287 *res = be32_to_cpup(p);
3288 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3289 }
3290 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3291 return 0;
3292out_overflow:
3293 print_overflow_msg(__func__, xdr);
3294 return -EIO;
3295}
3296
3297static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3298{
3299 __be32 *p;
3300
3301 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3302 return -EIO;
3303 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3304 p = xdr_inline_decode(xdr, 4);
3305 if (unlikely(!p))
3306 goto out_overflow;
3307 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3308 *res = -be32_to_cpup(p);
3309 }
3310 return 0;
3311out_overflow:
3312 print_overflow_msg(__func__, xdr);
3313 return -EIO;
3314}
3315
3316static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3317{
3318 __be32 *p;
3319 int len;
3320
3321 if (fh != NULL)
3322 memset(fh, 0, sizeof(*fh));
3323
3324 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3325 return -EIO;
3326 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3327 p = xdr_inline_decode(xdr, 4);
3328 if (unlikely(!p))
3329 goto out_overflow;
3330 len = be32_to_cpup(p);
3331 if (len > NFS4_FHSIZE)
3332 return -EIO;
3333 p = xdr_inline_decode(xdr, len);
3334 if (unlikely(!p))
3335 goto out_overflow;
3336 if (fh != NULL) {
3337 memcpy(fh->data, p, len);
3338 fh->size = len;
3339 }
3340 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3341 }
3342 return 0;
3343out_overflow:
3344 print_overflow_msg(__func__, xdr);
3345 return -EIO;
3346}
3347
3348static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3349{
3350 __be32 *p;
3351
3352 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3353 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3354 return -EIO;
3355 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3356 p = xdr_inline_decode(xdr, 4);
3357 if (unlikely(!p))
3358 goto out_overflow;
3359 *res = be32_to_cpup(p);
3360 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3361 }
3362 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3363 return 0;
3364out_overflow:
3365 print_overflow_msg(__func__, xdr);
3366 return -EIO;
3367}
3368
3369static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3370{
3371 __be32 *p;
3372 int ret = 0;
3373
3374 *fileid = 0;
3375 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3376 return -EIO;
3377 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3378 p = xdr_inline_decode(xdr, 8);
3379 if (unlikely(!p))
3380 goto out_overflow;
3381 xdr_decode_hyper(p, fileid);
3382 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3383 ret = NFS_ATTR_FATTR_FILEID;
3384 }
3385 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3386 return ret;
3387out_overflow:
3388 print_overflow_msg(__func__, xdr);
3389 return -EIO;
3390}
3391
3392static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3393{
3394 __be32 *p;
3395 int ret = 0;
3396
3397 *fileid = 0;
3398 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3399 return -EIO;
3400 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3401 p = xdr_inline_decode(xdr, 8);
3402 if (unlikely(!p))
3403 goto out_overflow;
3404 xdr_decode_hyper(p, fileid);
3405 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3406 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3407 }
3408 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409 return ret;
3410out_overflow:
3411 print_overflow_msg(__func__, xdr);
3412 return -EIO;
3413}
3414
3415static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3416{
3417 __be32 *p;
3418 int status = 0;
3419
3420 *res = 0;
3421 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3422 return -EIO;
3423 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3424 p = xdr_inline_decode(xdr, 8);
3425 if (unlikely(!p))
3426 goto out_overflow;
3427 xdr_decode_hyper(p, res);
3428 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3429 }
3430 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3431 return status;
3432out_overflow:
3433 print_overflow_msg(__func__, xdr);
3434 return -EIO;
3435}
3436
3437static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3438{
3439 __be32 *p;
3440 int status = 0;
3441
3442 *res = 0;
3443 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3444 return -EIO;
3445 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3446 p = xdr_inline_decode(xdr, 8);
3447 if (unlikely(!p))
3448 goto out_overflow;
3449 xdr_decode_hyper(p, res);
3450 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3451 }
3452 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3453 return status;
3454out_overflow:
3455 print_overflow_msg(__func__, xdr);
3456 return -EIO;
3457}
3458
3459static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3460{
3461 __be32 *p;
3462 int status = 0;
3463
3464 *res = 0;
3465 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3466 return -EIO;
3467 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3468 p = xdr_inline_decode(xdr, 8);
3469 if (unlikely(!p))
3470 goto out_overflow;
3471 xdr_decode_hyper(p, res);
3472 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3473 }
3474 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3475 return status;
3476out_overflow:
3477 print_overflow_msg(__func__, xdr);
3478 return -EIO;
3479}
3480
3481static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3482{
3483 u32 n;
3484 __be32 *p;
3485 int status = 0;
3486
3487 p = xdr_inline_decode(xdr, 4);
3488 if (unlikely(!p))
3489 goto out_overflow;
3490 n = be32_to_cpup(p);
3491 if (n == 0)
3492 goto root_path;
3493 dprintk("pathname4: ");
3494 path->ncomponents = 0;
3495 while (path->ncomponents < n) {
3496 struct nfs4_string *component = &path->components[path->ncomponents];
3497 status = decode_opaque_inline(xdr, &component->len, &component->data);
3498 if (unlikely(status != 0))
3499 goto out_eio;
3500 ifdebug (XDR)
3501 pr_cont("%s%.*s ",
3502 (path->ncomponents != n ? "/ " : ""),
3503 component->len, component->data);
3504 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3505 path->ncomponents++;
3506 else {
3507 dprintk("cannot parse %d components in path\n", n);
3508 goto out_eio;
3509 }
3510 }
3511out:
3512 return status;
3513root_path:
3514/* a root pathname is sent as a zero component4 */
3515 path->ncomponents = 1;
3516 path->components[0].len=0;
3517 path->components[0].data=NULL;
3518 dprintk("pathname4: /\n");
3519 goto out;
3520out_eio:
3521 dprintk(" status %d", status);
3522 status = -EIO;
3523 goto out;
3524out_overflow:
3525 print_overflow_msg(__func__, xdr);
3526 return -EIO;
3527}
3528
3529static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3530{
3531 int n;
3532 __be32 *p;
3533 int status = -EIO;
3534
3535 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3536 goto out;
3537 status = 0;
3538 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3539 goto out;
3540 status = -EIO;
3541 /* Ignore borken servers that return unrequested attrs */
3542 if (unlikely(res == NULL))
3543 goto out;
3544 dprintk("%s: fsroot:\n", __func__);
3545 status = decode_pathname(xdr, &res->fs_path);
3546 if (unlikely(status != 0))
3547 goto out;
3548 p = xdr_inline_decode(xdr, 4);
3549 if (unlikely(!p))
3550 goto out_overflow;
3551 n = be32_to_cpup(p);
3552 if (n <= 0)
3553 goto out_eio;
3554 res->nlocations = 0;
3555 while (res->nlocations < n) {
3556 u32 m;
3557 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3558
3559 p = xdr_inline_decode(xdr, 4);
3560 if (unlikely(!p))
3561 goto out_overflow;
3562 m = be32_to_cpup(p);
3563
3564 loc->nservers = 0;
3565 dprintk("%s: servers:\n", __func__);
3566 while (loc->nservers < m) {
3567 struct nfs4_string *server = &loc->servers[loc->nservers];
3568 status = decode_opaque_inline(xdr, &server->len, &server->data);
3569 if (unlikely(status != 0))
3570 goto out_eio;
3571 dprintk("%s ", server->data);
3572 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3573 loc->nservers++;
3574 else {
3575 unsigned int i;
3576 dprintk("%s: using first %u of %u servers "
3577 "returned for location %u\n",
3578 __func__,
3579 NFS4_FS_LOCATION_MAXSERVERS,
3580 m, res->nlocations);
3581 for (i = loc->nservers; i < m; i++) {
3582 unsigned int len;
3583 char *data;
3584 status = decode_opaque_inline(xdr, &len, &data);
3585 if (unlikely(status != 0))
3586 goto out_eio;
3587 }
3588 }
3589 }
3590 status = decode_pathname(xdr, &loc->rootpath);
3591 if (unlikely(status != 0))
3592 goto out_eio;
3593 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3594 res->nlocations++;
3595 }
3596 if (res->nlocations != 0)
3597 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3598out:
3599 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3600 return status;
3601out_overflow:
3602 print_overflow_msg(__func__, xdr);
3603out_eio:
3604 status = -EIO;
3605 goto out;
3606}
3607
3608static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3609{
3610 __be32 *p;
3611 int status = 0;
3612
3613 *res = 0;
3614 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3615 return -EIO;
3616 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3617 p = xdr_inline_decode(xdr, 8);
3618 if (unlikely(!p))
3619 goto out_overflow;
3620 xdr_decode_hyper(p, res);
3621 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3622 }
3623 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3624 return status;
3625out_overflow:
3626 print_overflow_msg(__func__, xdr);
3627 return -EIO;
3628}
3629
3630static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3631{
3632 __be32 *p;
3633 int status = 0;
3634
3635 *maxlink = 1;
3636 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3637 return -EIO;
3638 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3639 p = xdr_inline_decode(xdr, 4);
3640 if (unlikely(!p))
3641 goto out_overflow;
3642 *maxlink = be32_to_cpup(p);
3643 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3644 }
3645 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3646 return status;
3647out_overflow:
3648 print_overflow_msg(__func__, xdr);
3649 return -EIO;
3650}
3651
3652static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3653{
3654 __be32 *p;
3655 int status = 0;
3656
3657 *maxname = 1024;
3658 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3659 return -EIO;
3660 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3661 p = xdr_inline_decode(xdr, 4);
3662 if (unlikely(!p))
3663 goto out_overflow;
3664 *maxname = be32_to_cpup(p);
3665 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3666 }
3667 dprintk("%s: maxname=%u\n", __func__, *maxname);
3668 return status;
3669out_overflow:
3670 print_overflow_msg(__func__, xdr);
3671 return -EIO;
3672}
3673
3674static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3675{
3676 __be32 *p;
3677 int status = 0;
3678
3679 *res = 1024;
3680 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3681 return -EIO;
3682 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3683 uint64_t maxread;
3684 p = xdr_inline_decode(xdr, 8);
3685 if (unlikely(!p))
3686 goto out_overflow;
3687 xdr_decode_hyper(p, &maxread);
3688 if (maxread > 0x7FFFFFFF)
3689 maxread = 0x7FFFFFFF;
3690 *res = (uint32_t)maxread;
3691 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3692 }
3693 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3694 return status;
3695out_overflow:
3696 print_overflow_msg(__func__, xdr);
3697 return -EIO;
3698}
3699
3700static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3701{
3702 __be32 *p;
3703 int status = 0;
3704
3705 *res = 1024;
3706 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3707 return -EIO;
3708 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3709 uint64_t maxwrite;
3710 p = xdr_inline_decode(xdr, 8);
3711 if (unlikely(!p))
3712 goto out_overflow;
3713 xdr_decode_hyper(p, &maxwrite);
3714 if (maxwrite > 0x7FFFFFFF)
3715 maxwrite = 0x7FFFFFFF;
3716 *res = (uint32_t)maxwrite;
3717 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3718 }
3719 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3720 return status;
3721out_overflow:
3722 print_overflow_msg(__func__, xdr);
3723 return -EIO;
3724}
3725
3726static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3727{
3728 uint32_t tmp;
3729 __be32 *p;
3730 int ret = 0;
3731
3732 *mode = 0;
3733 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3734 return -EIO;
3735 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3736 p = xdr_inline_decode(xdr, 4);
3737 if (unlikely(!p))
3738 goto out_overflow;
3739 tmp = be32_to_cpup(p);
3740 *mode = tmp & ~S_IFMT;
3741 bitmap[1] &= ~FATTR4_WORD1_MODE;
3742 ret = NFS_ATTR_FATTR_MODE;
3743 }
3744 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3745 return ret;
3746out_overflow:
3747 print_overflow_msg(__func__, xdr);
3748 return -EIO;
3749}
3750
3751static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3752{
3753 __be32 *p;
3754 int ret = 0;
3755
3756 *nlink = 1;
3757 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3758 return -EIO;
3759 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3760 p = xdr_inline_decode(xdr, 4);
3761 if (unlikely(!p))
3762 goto out_overflow;
3763 *nlink = be32_to_cpup(p);
3764 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3765 ret = NFS_ATTR_FATTR_NLINK;
3766 }
3767 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3768 return ret;
3769out_overflow:
3770 print_overflow_msg(__func__, xdr);
3771 return -EIO;
3772}
3773
3774static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3775 const struct nfs_server *server, uint32_t *uid,
3776 struct nfs4_string *owner_name)
3777{
3778 uint32_t len;
3779 __be32 *p;
3780 int ret = 0;
3781
3782 *uid = -2;
3783 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3784 return -EIO;
3785 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3786 p = xdr_inline_decode(xdr, 4);
3787 if (unlikely(!p))
3788 goto out_overflow;
3789 len = be32_to_cpup(p);
3790 p = xdr_inline_decode(xdr, len);
3791 if (unlikely(!p))
3792 goto out_overflow;
3793 if (owner_name != NULL) {
3794 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3795 if (owner_name->data != NULL) {
3796 owner_name->len = len;
3797 ret = NFS_ATTR_FATTR_OWNER_NAME;
3798 }
3799 } else if (len < XDR_MAX_NETOBJ) {
3800 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3801 ret = NFS_ATTR_FATTR_OWNER;
3802 else
3803 dprintk("%s: nfs_map_name_to_uid failed!\n",
3804 __func__);
3805 } else
3806 dprintk("%s: name too long (%u)!\n",
3807 __func__, len);
3808 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3809 }
3810 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3811 return ret;
3812out_overflow:
3813 print_overflow_msg(__func__, xdr);
3814 return -EIO;
3815}
3816
3817static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3818 const struct nfs_server *server, uint32_t *gid,
3819 struct nfs4_string *group_name)
3820{
3821 uint32_t len;
3822 __be32 *p;
3823 int ret = 0;
3824
3825 *gid = -2;
3826 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3827 return -EIO;
3828 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3829 p = xdr_inline_decode(xdr, 4);
3830 if (unlikely(!p))
3831 goto out_overflow;
3832 len = be32_to_cpup(p);
3833 p = xdr_inline_decode(xdr, len);
3834 if (unlikely(!p))
3835 goto out_overflow;
3836 if (group_name != NULL) {
3837 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3838 if (group_name->data != NULL) {
3839 group_name->len = len;
3840 ret = NFS_ATTR_FATTR_GROUP_NAME;
3841 }
3842 } else if (len < XDR_MAX_NETOBJ) {
3843 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3844 ret = NFS_ATTR_FATTR_GROUP;
3845 else
3846 dprintk("%s: nfs_map_group_to_gid failed!\n",
3847 __func__);
3848 } else
3849 dprintk("%s: name too long (%u)!\n",
3850 __func__, len);
3851 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3852 }
3853 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3854 return ret;
3855out_overflow:
3856 print_overflow_msg(__func__, xdr);
3857 return -EIO;
3858}
3859
3860static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3861{
3862 uint32_t major = 0, minor = 0;
3863 __be32 *p;
3864 int ret = 0;
3865
3866 *rdev = MKDEV(0,0);
3867 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3868 return -EIO;
3869 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3870 dev_t tmp;
3871
3872 p = xdr_inline_decode(xdr, 8);
3873 if (unlikely(!p))
3874 goto out_overflow;
3875 major = be32_to_cpup(p++);
3876 minor = be32_to_cpup(p);
3877 tmp = MKDEV(major, minor);
3878 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3879 *rdev = tmp;
3880 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3881 ret = NFS_ATTR_FATTR_RDEV;
3882 }
3883 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3884 return ret;
3885out_overflow:
3886 print_overflow_msg(__func__, xdr);
3887 return -EIO;
3888}
3889
3890static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3891{
3892 __be32 *p;
3893 int status = 0;
3894
3895 *res = 0;
3896 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3897 return -EIO;
3898 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3899 p = xdr_inline_decode(xdr, 8);
3900 if (unlikely(!p))
3901 goto out_overflow;
3902 xdr_decode_hyper(p, res);
3903 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3904 }
3905 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3906 return status;
3907out_overflow:
3908 print_overflow_msg(__func__, xdr);
3909 return -EIO;
3910}
3911
3912static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3913{
3914 __be32 *p;
3915 int status = 0;
3916
3917 *res = 0;
3918 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3919 return -EIO;
3920 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3921 p = xdr_inline_decode(xdr, 8);
3922 if (unlikely(!p))
3923 goto out_overflow;
3924 xdr_decode_hyper(p, res);
3925 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3926 }
3927 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3928 return status;
3929out_overflow:
3930 print_overflow_msg(__func__, xdr);
3931 return -EIO;
3932}
3933
3934static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3935{
3936 __be32 *p;
3937 int status = 0;
3938
3939 *res = 0;
3940 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3941 return -EIO;
3942 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3943 p = xdr_inline_decode(xdr, 8);
3944 if (unlikely(!p))
3945 goto out_overflow;
3946 xdr_decode_hyper(p, res);
3947 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3948 }
3949 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3950 return status;
3951out_overflow:
3952 print_overflow_msg(__func__, xdr);
3953 return -EIO;
3954}
3955
3956static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3957{
3958 __be32 *p;
3959 int ret = 0;
3960
3961 *used = 0;
3962 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3963 return -EIO;
3964 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3965 p = xdr_inline_decode(xdr, 8);
3966 if (unlikely(!p))
3967 goto out_overflow;
3968 xdr_decode_hyper(p, used);
3969 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3970 ret = NFS_ATTR_FATTR_SPACE_USED;
3971 }
3972 dprintk("%s: space used=%Lu\n", __func__,
3973 (unsigned long long)*used);
3974 return ret;
3975out_overflow:
3976 print_overflow_msg(__func__, xdr);
3977 return -EIO;
3978}
3979
3980static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3981{
3982 __be32 *p;
3983 uint64_t sec;
3984 uint32_t nsec;
3985
3986 p = xdr_inline_decode(xdr, 12);
3987 if (unlikely(!p))
3988 goto out_overflow;
3989 p = xdr_decode_hyper(p, &sec);
3990 nsec = be32_to_cpup(p);
3991 time->tv_sec = (time_t)sec;
3992 time->tv_nsec = (long)nsec;
3993 return 0;
3994out_overflow:
3995 print_overflow_msg(__func__, xdr);
3996 return -EIO;
3997}
3998
3999static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4000{
4001 int status = 0;
4002
4003 time->tv_sec = 0;
4004 time->tv_nsec = 0;
4005 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4006 return -EIO;
4007 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4008 status = decode_attr_time(xdr, time);
4009 if (status == 0)
4010 status = NFS_ATTR_FATTR_ATIME;
4011 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4012 }
4013 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4014 return status;
4015}
4016
4017static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4018{
4019 int status = 0;
4020
4021 time->tv_sec = 0;
4022 time->tv_nsec = 0;
4023 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4024 return -EIO;
4025 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4026 status = decode_attr_time(xdr, time);
4027 if (status == 0)
4028 status = NFS_ATTR_FATTR_CTIME;
4029 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4030 }
4031 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4032 return status;
4033}
4034
4035static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4036 struct timespec *time)
4037{
4038 int status = 0;
4039
4040 time->tv_sec = 0;
4041 time->tv_nsec = 0;
4042 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4043 return -EIO;
4044 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4045 status = decode_attr_time(xdr, time);
4046 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4047 }
4048 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4049 (long)time->tv_nsec);
4050 return status;
4051}
4052
4053static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4054{
4055 int status = 0;
4056
4057 time->tv_sec = 0;
4058 time->tv_nsec = 0;
4059 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4060 return -EIO;
4061 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4062 status = decode_attr_time(xdr, time);
4063 if (status == 0)
4064 status = NFS_ATTR_FATTR_MTIME;
4065 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4066 }
4067 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4068 return status;
4069}
4070
4071static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4072{
4073 unsigned int attrwords = XDR_QUADLEN(attrlen);
4074 unsigned int nwords = xdr->p - savep;
4075
4076 if (unlikely(attrwords != nwords)) {
4077 dprintk("%s: server returned incorrect attribute length: "
4078 "%u %c %u\n",
4079 __func__,
4080 attrwords << 2,
4081 (attrwords < nwords) ? '<' : '>',
4082 nwords << 2);
4083 return -EIO;
4084 }
4085 return 0;
4086}
4087
4088static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4089{
4090 __be32 *p;
4091
4092 p = xdr_inline_decode(xdr, 20);
4093 if (unlikely(!p))
4094 goto out_overflow;
4095 cinfo->atomic = be32_to_cpup(p++);
4096 p = xdr_decode_hyper(p, &cinfo->before);
4097 xdr_decode_hyper(p, &cinfo->after);
4098 return 0;
4099out_overflow:
4100 print_overflow_msg(__func__, xdr);
4101 return -EIO;
4102}
4103
4104static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4105{
4106 __be32 *p;
4107 uint32_t supp, acc;
4108 int status;
4109
4110 status = decode_op_hdr(xdr, OP_ACCESS);
4111 if (status)
4112 return status;
4113 p = xdr_inline_decode(xdr, 8);
4114 if (unlikely(!p))
4115 goto out_overflow;
4116 supp = be32_to_cpup(p++);
4117 acc = be32_to_cpup(p);
4118 access->supported = supp;
4119 access->access = acc;
4120 return 0;
4121out_overflow:
4122 print_overflow_msg(__func__, xdr);
4123 return -EIO;
4124}
4125
4126static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4127{
4128 __be32 *p;
4129
4130 p = xdr_inline_decode(xdr, len);
4131 if (likely(p)) {
4132 memcpy(buf, p, len);
4133 return 0;
4134 }
4135 print_overflow_msg(__func__, xdr);
4136 return -EIO;
4137}
4138
4139static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4140{
4141 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4142}
4143
4144static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4145{
4146 int status;
4147
4148 status = decode_op_hdr(xdr, OP_CLOSE);
4149 if (status != -EIO)
4150 nfs_increment_open_seqid(status, res->seqid);
4151 if (!status)
4152 status = decode_stateid(xdr, &res->stateid);
4153 return status;
4154}
4155
4156static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4157{
4158 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4159}
4160
4161static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4162{
4163 int status;
4164
4165 status = decode_op_hdr(xdr, OP_COMMIT);
4166 if (!status)
4167 status = decode_verifier(xdr, res->verf->verifier);
4168 return status;
4169}
4170
4171static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4172{
4173 __be32 *p;
4174 uint32_t bmlen;
4175 int status;
4176
4177 status = decode_op_hdr(xdr, OP_CREATE);
4178 if (status)
4179 return status;
4180 if ((status = decode_change_info(xdr, cinfo)))
4181 return status;
4182 p = xdr_inline_decode(xdr, 4);
4183 if (unlikely(!p))
4184 goto out_overflow;
4185 bmlen = be32_to_cpup(p);
4186 p = xdr_inline_decode(xdr, bmlen << 2);
4187 if (likely(p))
4188 return 0;
4189out_overflow:
4190 print_overflow_msg(__func__, xdr);
4191 return -EIO;
4192}
4193
4194static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4195{
4196 __be32 *savep;
4197 uint32_t attrlen, bitmap[3] = {0};
4198 int status;
4199
4200 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4201 goto xdr_error;
4202 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4203 goto xdr_error;
4204 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4205 goto xdr_error;
4206 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4207 goto xdr_error;
4208 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4209 &res->fh_expire_type)) != 0)
4210 goto xdr_error;
4211 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4212 goto xdr_error;
4213 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4214 goto xdr_error;
4215 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4216 goto xdr_error;
4217 status = verify_attr_len(xdr, savep, attrlen);
4218xdr_error:
4219 dprintk("%s: xdr returned %d!\n", __func__, -status);
4220 return status;
4221}
4222
4223static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4224{
4225 __be32 *savep;
4226 uint32_t attrlen, bitmap[3] = {0};
4227 int status;
4228
4229 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4230 goto xdr_error;
4231 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4232 goto xdr_error;
4233 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4234 goto xdr_error;
4235
4236 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4237 goto xdr_error;
4238 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4239 goto xdr_error;
4240 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4241 goto xdr_error;
4242 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4243 goto xdr_error;
4244 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4245 goto xdr_error;
4246 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4247 goto xdr_error;
4248
4249 status = verify_attr_len(xdr, savep, attrlen);
4250xdr_error:
4251 dprintk("%s: xdr returned %d!\n", __func__, -status);
4252 return status;
4253}
4254
4255static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4256{
4257 __be32 *savep;
4258 uint32_t attrlen, bitmap[3] = {0};
4259 int status;
4260
4261 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4262 goto xdr_error;
4263 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4264 goto xdr_error;
4265 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4266 goto xdr_error;
4267
4268 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4269 goto xdr_error;
4270 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4271 goto xdr_error;
4272
4273 status = verify_attr_len(xdr, savep, attrlen);
4274xdr_error:
4275 dprintk("%s: xdr returned %d!\n", __func__, -status);
4276 return status;
4277}
4278
4279static int decode_threshold_hint(struct xdr_stream *xdr,
4280 uint32_t *bitmap,
4281 uint64_t *res,
4282 uint32_t hint_bit)
4283{
4284 __be32 *p;
4285
4286 *res = 0;
4287 if (likely(bitmap[0] & hint_bit)) {
4288 p = xdr_inline_decode(xdr, 8);
4289 if (unlikely(!p))
4290 goto out_overflow;
4291 xdr_decode_hyper(p, res);
4292 }
4293 return 0;
4294out_overflow:
4295 print_overflow_msg(__func__, xdr);
4296 return -EIO;
4297}
4298
4299static int decode_first_threshold_item4(struct xdr_stream *xdr,
4300 struct nfs4_threshold *res)
4301{
4302 __be32 *p, *savep;
4303 uint32_t bitmap[3] = {0,}, attrlen;
4304 int status;
4305
4306 /* layout type */
4307 p = xdr_inline_decode(xdr, 4);
4308 if (unlikely(!p)) {
4309 print_overflow_msg(__func__, xdr);
4310 return -EIO;
4311 }
4312 res->l_type = be32_to_cpup(p);
4313
4314 /* thi_hintset bitmap */
4315 status = decode_attr_bitmap(xdr, bitmap);
4316 if (status < 0)
4317 goto xdr_error;
4318
4319 /* thi_hintlist length */
4320 status = decode_attr_length(xdr, &attrlen, &savep);
4321 if (status < 0)
4322 goto xdr_error;
4323 /* thi_hintlist */
4324 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4325 if (status < 0)
4326 goto xdr_error;
4327 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4328 if (status < 0)
4329 goto xdr_error;
4330 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4331 THRESHOLD_RD_IO);
4332 if (status < 0)
4333 goto xdr_error;
4334 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4335 THRESHOLD_WR_IO);
4336 if (status < 0)
4337 goto xdr_error;
4338
4339 status = verify_attr_len(xdr, savep, attrlen);
4340 res->bm = bitmap[0];
4341
4342 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4343 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4344 res->wr_io_sz);
4345xdr_error:
4346 dprintk("%s ret=%d!\n", __func__, status);
4347 return status;
4348}
4349
4350/*
4351 * Thresholds on pNFS direct I/O vrs MDS I/O
4352 */
4353static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4354 uint32_t *bitmap,
4355 struct nfs4_threshold *res)
4356{
4357 __be32 *p;
4358 int status = 0;
4359 uint32_t num;
4360
4361 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4362 return -EIO;
4363 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4364 /* Did the server return an unrequested attribute? */
4365 if (unlikely(res == NULL))
4366 return -EREMOTEIO;
4367 p = xdr_inline_decode(xdr, 4);
4368 if (unlikely(!p))
4369 goto out_overflow;
4370 num = be32_to_cpup(p);
4371 if (num == 0)
4372 return 0;
4373 if (num > 1)
4374 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4375 "drivers per filesystem not supported\n",
4376 __func__);
4377
4378 status = decode_first_threshold_item4(xdr, res);
4379 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4380 }
4381 return status;
4382out_overflow:
4383 print_overflow_msg(__func__, xdr);
4384 return -EIO;
4385}
4386
4387static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4388 struct nfs_fattr *fattr, struct nfs_fh *fh,
4389 struct nfs4_fs_locations *fs_loc,
4390 const struct nfs_server *server)
4391{
4392 int status;
4393 umode_t fmode = 0;
4394 uint32_t type;
4395 int32_t err;
4396
4397 status = decode_attr_type(xdr, bitmap, &type);
4398 if (status < 0)
4399 goto xdr_error;
4400 fattr->mode = 0;
4401 if (status != 0) {
4402 fattr->mode |= nfs_type2fmt[type];
4403 fattr->valid |= status;
4404 }
4405
4406 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4407 if (status < 0)
4408 goto xdr_error;
4409 fattr->valid |= status;
4410
4411 status = decode_attr_size(xdr, bitmap, &fattr->size);
4412 if (status < 0)
4413 goto xdr_error;
4414 fattr->valid |= status;
4415
4416 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4417 if (status < 0)
4418 goto xdr_error;
4419 fattr->valid |= status;
4420
4421 err = 0;
4422 status = decode_attr_error(xdr, bitmap, &err);
4423 if (status < 0)
4424 goto xdr_error;
4425
4426 status = decode_attr_filehandle(xdr, bitmap, fh);
4427 if (status < 0)
4428 goto xdr_error;
4429
4430 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4431 if (status < 0)
4432 goto xdr_error;
4433 fattr->valid |= status;
4434
4435 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4436 if (status < 0)
4437 goto xdr_error;
4438 fattr->valid |= status;
4439
4440 status = decode_attr_mode(xdr, bitmap, &fmode);
4441 if (status < 0)
4442 goto xdr_error;
4443 if (status != 0) {
4444 fattr->mode |= fmode;
4445 fattr->valid |= status;
4446 }
4447
4448 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4449 if (status < 0)
4450 goto xdr_error;
4451 fattr->valid |= status;
4452
4453 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4454 if (status < 0)
4455 goto xdr_error;
4456 fattr->valid |= status;
4457
4458 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4459 if (status < 0)
4460 goto xdr_error;
4461 fattr->valid |= status;
4462
4463 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4464 if (status < 0)
4465 goto xdr_error;
4466 fattr->valid |= status;
4467
4468 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4469 if (status < 0)
4470 goto xdr_error;
4471 fattr->valid |= status;
4472
4473 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4474 if (status < 0)
4475 goto xdr_error;
4476 fattr->valid |= status;
4477
4478 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4479 if (status < 0)
4480 goto xdr_error;
4481 fattr->valid |= status;
4482
4483 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4484 if (status < 0)
4485 goto xdr_error;
4486 fattr->valid |= status;
4487
4488 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4489 if (status < 0)
4490 goto xdr_error;
4491 fattr->valid |= status;
4492
4493 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4494 if (status < 0)
4495 goto xdr_error;
4496
4497xdr_error:
4498 dprintk("%s: xdr returned %d\n", __func__, -status);
4499 return status;
4500}
4501
4502static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4503 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4504 const struct nfs_server *server)
4505{
4506 __be32 *savep;
4507 uint32_t attrlen,
4508 bitmap[3] = {0};
4509 int status;
4510
4511 status = decode_op_hdr(xdr, OP_GETATTR);
4512 if (status < 0)
4513 goto xdr_error;
4514
4515 status = decode_attr_bitmap(xdr, bitmap);
4516 if (status < 0)
4517 goto xdr_error;
4518
4519 status = decode_attr_length(xdr, &attrlen, &savep);
4520 if (status < 0)
4521 goto xdr_error;
4522
4523 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4524 if (status < 0)
4525 goto xdr_error;
4526
4527 status = verify_attr_len(xdr, savep, attrlen);
4528xdr_error:
4529 dprintk("%s: xdr returned %d\n", __func__, -status);
4530 return status;
4531}
4532
4533static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4534 const struct nfs_server *server)
4535{
4536 return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4537}
4538
4539/*
4540 * Decode potentially multiple layout types. Currently we only support
4541 * one layout driver per file system.
4542 */
4543static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4544 uint32_t *layouttype)
4545{
4546 uint32_t *p;
4547 int num;
4548
4549 p = xdr_inline_decode(xdr, 4);
4550 if (unlikely(!p))
4551 goto out_overflow;
4552 num = be32_to_cpup(p);
4553
4554 /* pNFS is not supported by the underlying file system */
4555 if (num == 0) {
4556 *layouttype = 0;
4557 return 0;
4558 }
4559 if (num > 1)
4560 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4561 "drivers per filesystem not supported\n", __func__);
4562
4563 /* Decode and set first layout type, move xdr->p past unused types */
4564 p = xdr_inline_decode(xdr, num * 4);
4565 if (unlikely(!p))
4566 goto out_overflow;
4567 *layouttype = be32_to_cpup(p);
4568 return 0;
4569out_overflow:
4570 print_overflow_msg(__func__, xdr);
4571 return -EIO;
4572}
4573
4574/*
4575 * The type of file system exported.
4576 * Note we must ensure that layouttype is set in any non-error case.
4577 */
4578static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4579 uint32_t *layouttype)
4580{
4581 int status = 0;
4582
4583 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4584 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4585 return -EIO;
4586 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4587 status = decode_first_pnfs_layout_type(xdr, layouttype);
4588 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4589 } else
4590 *layouttype = 0;
4591 return status;
4592}
4593
4594/*
4595 * The prefered block size for layout directed io
4596 */
4597static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4598 uint32_t *res)
4599{
4600 __be32 *p;
4601
4602 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4603 *res = 0;
4604 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4605 p = xdr_inline_decode(xdr, 4);
4606 if (unlikely(!p)) {
4607 print_overflow_msg(__func__, xdr);
4608 return -EIO;
4609 }
4610 *res = be32_to_cpup(p);
4611 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4612 }
4613 return 0;
4614}
4615
4616static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4617{
4618 __be32 *savep;
4619 uint32_t attrlen, bitmap[3];
4620 int status;
4621
4622 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4623 goto xdr_error;
4624 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4625 goto xdr_error;
4626 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4627 goto xdr_error;
4628
4629 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4630
4631 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4632 goto xdr_error;
4633 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4634 goto xdr_error;
4635 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4636 goto xdr_error;
4637 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4638 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4639 goto xdr_error;
4640 fsinfo->wtpref = fsinfo->wtmax;
4641 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4642 if (status != 0)
4643 goto xdr_error;
4644 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4645 if (status != 0)
4646 goto xdr_error;
4647 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4648 if (status)
4649 goto xdr_error;
4650
4651 status = verify_attr_len(xdr, savep, attrlen);
4652xdr_error:
4653 dprintk("%s: xdr returned %d!\n", __func__, -status);
4654 return status;
4655}
4656
4657static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4658{
4659 __be32 *p;
4660 uint32_t len;
4661 int status;
4662
4663 /* Zero handle first to allow comparisons */
4664 memset(fh, 0, sizeof(*fh));
4665
4666 status = decode_op_hdr(xdr, OP_GETFH);
4667 if (status)
4668 return status;
4669
4670 p = xdr_inline_decode(xdr, 4);
4671 if (unlikely(!p))
4672 goto out_overflow;
4673 len = be32_to_cpup(p);
4674 if (len > NFS4_FHSIZE)
4675 return -EIO;
4676 fh->size = len;
4677 p = xdr_inline_decode(xdr, len);
4678 if (unlikely(!p))
4679 goto out_overflow;
4680 memcpy(fh->data, p, len);
4681 return 0;
4682out_overflow:
4683 print_overflow_msg(__func__, xdr);
4684 return -EIO;
4685}
4686
4687static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4688{
4689 int status;
4690
4691 status = decode_op_hdr(xdr, OP_LINK);
4692 if (status)
4693 return status;
4694 return decode_change_info(xdr, cinfo);
4695}
4696
4697/*
4698 * We create the owner, so we know a proper owner.id length is 4.
4699 */
4700static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4701{
4702 uint64_t offset, length, clientid;
4703 __be32 *p;
4704 uint32_t namelen, type;
4705
4706 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4707 if (unlikely(!p))
4708 goto out_overflow;
4709 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4710 p = xdr_decode_hyper(p, &length);
4711 type = be32_to_cpup(p++); /* 4 byte read */
4712 if (fl != NULL) { /* manipulate file lock */
4713 fl->fl_start = (loff_t)offset;
4714 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4715 if (length == ~(uint64_t)0)
4716 fl->fl_end = OFFSET_MAX;
4717 fl->fl_type = F_WRLCK;
4718 if (type & 1)
4719 fl->fl_type = F_RDLCK;
4720 fl->fl_pid = 0;
4721 }
4722 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4723 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4724 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4725 if (likely(p))
4726 return -NFS4ERR_DENIED;
4727out_overflow:
4728 print_overflow_msg(__func__, xdr);
4729 return -EIO;
4730}
4731
4732static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4733{
4734 int status;
4735
4736 status = decode_op_hdr(xdr, OP_LOCK);
4737 if (status == -EIO)
4738 goto out;
4739 if (status == 0) {
4740 status = decode_stateid(xdr, &res->stateid);
4741 if (unlikely(status))
4742 goto out;
4743 } else if (status == -NFS4ERR_DENIED)
4744 status = decode_lock_denied(xdr, NULL);
4745 if (res->open_seqid != NULL)
4746 nfs_increment_open_seqid(status, res->open_seqid);
4747 nfs_increment_lock_seqid(status, res->lock_seqid);
4748out:
4749 return status;
4750}
4751
4752static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4753{
4754 int status;
4755 status = decode_op_hdr(xdr, OP_LOCKT);
4756 if (status == -NFS4ERR_DENIED)
4757 return decode_lock_denied(xdr, res->denied);
4758 return status;
4759}
4760
4761static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4762{
4763 int status;
4764
4765 status = decode_op_hdr(xdr, OP_LOCKU);
4766 if (status != -EIO)
4767 nfs_increment_lock_seqid(status, res->seqid);
4768 if (status == 0)
4769 status = decode_stateid(xdr, &res->stateid);
4770 return status;
4771}
4772
4773static int decode_release_lockowner(struct xdr_stream *xdr)
4774{
4775 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4776}
4777
4778static int decode_lookup(struct xdr_stream *xdr)
4779{
4780 return decode_op_hdr(xdr, OP_LOOKUP);
4781}
4782
4783/* This is too sick! */
4784static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4785{
4786 __be32 *p;
4787 uint32_t limit_type, nblocks, blocksize;
4788
4789 p = xdr_inline_decode(xdr, 12);
4790 if (unlikely(!p))
4791 goto out_overflow;
4792 limit_type = be32_to_cpup(p++);
4793 switch (limit_type) {
4794 case 1:
4795 xdr_decode_hyper(p, maxsize);
4796 break;
4797 case 2:
4798 nblocks = be32_to_cpup(p++);
4799 blocksize = be32_to_cpup(p);
4800 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4801 }
4802 return 0;
4803out_overflow:
4804 print_overflow_msg(__func__, xdr);
4805 return -EIO;
4806}
4807
4808static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4809{
4810 __be32 *p;
4811 uint32_t delegation_type;
4812 int status;
4813
4814 p = xdr_inline_decode(xdr, 4);
4815 if (unlikely(!p))
4816 goto out_overflow;
4817 delegation_type = be32_to_cpup(p);
4818 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4819 res->delegation_type = 0;
4820 return 0;
4821 }
4822 status = decode_stateid(xdr, &res->delegation);
4823 if (unlikely(status))
4824 return status;
4825 p = xdr_inline_decode(xdr, 4);
4826 if (unlikely(!p))
4827 goto out_overflow;
4828 res->do_recall = be32_to_cpup(p);
4829
4830 switch (delegation_type) {
4831 case NFS4_OPEN_DELEGATE_READ:
4832 res->delegation_type = FMODE_READ;
4833 break;
4834 case NFS4_OPEN_DELEGATE_WRITE:
4835 res->delegation_type = FMODE_WRITE|FMODE_READ;
4836 if (decode_space_limit(xdr, &res->maxsize) < 0)
4837 return -EIO;
4838 }
4839 return decode_ace(xdr, NULL, res->server->nfs_client);
4840out_overflow:
4841 print_overflow_msg(__func__, xdr);
4842 return -EIO;
4843}
4844
4845static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4846{
4847 __be32 *p;
4848 uint32_t savewords, bmlen, i;
4849 int status;
4850
4851 status = decode_op_hdr(xdr, OP_OPEN);
4852 if (status != -EIO)
4853 nfs_increment_open_seqid(status, res->seqid);
4854 if (!status)
4855 status = decode_stateid(xdr, &res->stateid);
4856 if (unlikely(status))
4857 return status;
4858
4859 decode_change_info(xdr, &res->cinfo);
4860
4861 p = xdr_inline_decode(xdr, 8);
4862 if (unlikely(!p))
4863 goto out_overflow;
4864 res->rflags = be32_to_cpup(p++);
4865 bmlen = be32_to_cpup(p);
4866 if (bmlen > 10)
4867 goto xdr_error;
4868
4869 p = xdr_inline_decode(xdr, bmlen << 2);
4870 if (unlikely(!p))
4871 goto out_overflow;
4872 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4873 for (i = 0; i < savewords; ++i)
4874 res->attrset[i] = be32_to_cpup(p++);
4875 for (; i < NFS4_BITMAP_SIZE; i++)
4876 res->attrset[i] = 0;
4877
4878 return decode_delegation(xdr, res);
4879xdr_error:
4880 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4881 return -EIO;
4882out_overflow:
4883 print_overflow_msg(__func__, xdr);
4884 return -EIO;
4885}
4886
4887static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4888{
4889 int status;
4890
4891 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4892 if (status != -EIO)
4893 nfs_increment_open_seqid(status, res->seqid);
4894 if (!status)
4895 status = decode_stateid(xdr, &res->stateid);
4896 return status;
4897}
4898
4899static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4900{
4901 int status;
4902
4903 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4904 if (status != -EIO)
4905 nfs_increment_open_seqid(status, res->seqid);
4906 if (!status)
4907 status = decode_stateid(xdr, &res->stateid);
4908 return status;
4909}
4910
4911static int decode_putfh(struct xdr_stream *xdr)
4912{
4913 return decode_op_hdr(xdr, OP_PUTFH);
4914}
4915
4916static int decode_putrootfh(struct xdr_stream *xdr)
4917{
4918 return decode_op_hdr(xdr, OP_PUTROOTFH);
4919}
4920
4921static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4922{
4923 struct kvec *iov = req->rq_rcv_buf.head;
4924 __be32 *p;
4925 uint32_t count, eof, recvd, hdrlen;
4926 int status;
4927
4928 status = decode_op_hdr(xdr, OP_READ);
4929 if (status)
4930 return status;
4931 p = xdr_inline_decode(xdr, 8);
4932 if (unlikely(!p))
4933 goto out_overflow;
4934 eof = be32_to_cpup(p++);
4935 count = be32_to_cpup(p);
4936 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4937 recvd = req->rq_rcv_buf.len - hdrlen;
4938 if (count > recvd) {
4939 dprintk("NFS: server cheating in read reply: "
4940 "count %u > recvd %u\n", count, recvd);
4941 count = recvd;
4942 eof = 0;
4943 }
4944 xdr_read_pages(xdr, count);
4945 res->eof = eof;
4946 res->count = count;
4947 return 0;
4948out_overflow:
4949 print_overflow_msg(__func__, xdr);
4950 return -EIO;
4951}
4952
4953static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4954{
4955 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4956 struct kvec *iov = rcvbuf->head;
4957 size_t hdrlen;
4958 u32 recvd, pglen = rcvbuf->page_len;
4959 int status;
4960 __be32 verf[2];
4961
4962 status = decode_op_hdr(xdr, OP_READDIR);
4963 if (!status)
4964 status = decode_verifier(xdr, readdir->verifier.data);
4965 if (unlikely(status))
4966 return status;
4967 memcpy(verf, readdir->verifier.data, sizeof(verf));
4968 dprintk("%s: verifier = %08x:%08x\n",
4969 __func__, verf[0], verf[1]);
4970
4971 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4972 recvd = rcvbuf->len - hdrlen;
4973 if (pglen > recvd)
4974 pglen = recvd;
4975 xdr_read_pages(xdr, pglen);
4976
4977
4978 return pglen;
4979}
4980
4981static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4982{
4983 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4984 struct kvec *iov = rcvbuf->head;
4985 size_t hdrlen;
4986 u32 len, recvd;
4987 __be32 *p;
4988 int status;
4989
4990 status = decode_op_hdr(xdr, OP_READLINK);
4991 if (status)
4992 return status;
4993
4994 /* Convert length of symlink */
4995 p = xdr_inline_decode(xdr, 4);
4996 if (unlikely(!p))
4997 goto out_overflow;
4998 len = be32_to_cpup(p);
4999 if (len >= rcvbuf->page_len || len <= 0) {
5000 dprintk("nfs: server returned giant symlink!\n");
5001 return -ENAMETOOLONG;
5002 }
5003 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
5004 recvd = req->rq_rcv_buf.len - hdrlen;
5005 if (recvd < len) {
5006 dprintk("NFS: server cheating in readlink reply: "
5007 "count %u > recvd %u\n", len, recvd);
5008 return -EIO;
5009 }
5010 xdr_read_pages(xdr, len);
5011 /*
5012 * The XDR encode routine has set things up so that
5013 * the link text will be copied directly into the
5014 * buffer. We just have to do overflow-checking,
5015 * and and null-terminate the text (the VFS expects
5016 * null-termination).
5017 */
5018 xdr_terminate_string(rcvbuf, len);
5019 return 0;
5020out_overflow:
5021 print_overflow_msg(__func__, xdr);
5022 return -EIO;
5023}
5024
5025static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5026{
5027 int status;
5028
5029 status = decode_op_hdr(xdr, OP_REMOVE);
5030 if (status)
5031 goto out;
5032 status = decode_change_info(xdr, cinfo);
5033out:
5034 return status;
5035}
5036
5037static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5038 struct nfs4_change_info *new_cinfo)
5039{
5040 int status;
5041
5042 status = decode_op_hdr(xdr, OP_RENAME);
5043 if (status)
5044 goto out;
5045 if ((status = decode_change_info(xdr, old_cinfo)))
5046 goto out;
5047 status = decode_change_info(xdr, new_cinfo);
5048out:
5049 return status;
5050}
5051
5052static int decode_renew(struct xdr_stream *xdr)
5053{
5054 return decode_op_hdr(xdr, OP_RENEW);
5055}
5056
5057static int
5058decode_restorefh(struct xdr_stream *xdr)
5059{
5060 return decode_op_hdr(xdr, OP_RESTOREFH);
5061}
5062
5063static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5064 struct nfs_getaclres *res)
5065{
5066 __be32 *savep, *bm_p;
5067 uint32_t attrlen,
5068 bitmap[3] = {0};
5069 struct kvec *iov = req->rq_rcv_buf.head;
5070 int status;
5071 size_t page_len = xdr->buf->page_len;
5072
5073 res->acl_len = 0;
5074 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5075 goto out;
5076
5077 bm_p = xdr->p;
5078 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5079 res->acl_data_offset <<= 2;
5080 /* Check if the acl data starts beyond the allocated buffer */
5081 if (res->acl_data_offset > page_len)
5082 return -ERANGE;
5083
5084 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5085 goto out;
5086 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5087 goto out;
5088
5089 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5090 return -EIO;
5091 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5092 size_t hdrlen;
5093
5094 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5095 * are stored with the acl data to handle the problem of
5096 * variable length bitmaps.*/
5097 xdr->p = bm_p;
5098
5099 /* We ignore &savep and don't do consistency checks on
5100 * the attr length. Let userspace figure it out.... */
5101 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5102 attrlen += res->acl_data_offset;
5103 if (attrlen > page_len) {
5104 if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5105 /* getxattr interface called with a NULL buf */
5106 res->acl_len = attrlen;
5107 goto out;
5108 }
5109 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5110 attrlen, page_len);
5111 return -EINVAL;
5112 }
5113 xdr_read_pages(xdr, attrlen);
5114 res->acl_len = attrlen;
5115 } else
5116 status = -EOPNOTSUPP;
5117
5118out:
5119 return status;
5120}
5121
5122static int
5123decode_savefh(struct xdr_stream *xdr)
5124{
5125 return decode_op_hdr(xdr, OP_SAVEFH);
5126}
5127
5128static int decode_setattr(struct xdr_stream *xdr)
5129{
5130 __be32 *p;
5131 uint32_t bmlen;
5132 int status;
5133
5134 status = decode_op_hdr(xdr, OP_SETATTR);
5135 if (status)
5136 return status;
5137 p = xdr_inline_decode(xdr, 4);
5138 if (unlikely(!p))
5139 goto out_overflow;
5140 bmlen = be32_to_cpup(p);
5141 p = xdr_inline_decode(xdr, bmlen << 2);
5142 if (likely(p))
5143 return 0;
5144out_overflow:
5145 print_overflow_msg(__func__, xdr);
5146 return -EIO;
5147}
5148
5149static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5150{
5151 __be32 *p;
5152 uint32_t opnum;
5153 int32_t nfserr;
5154
5155 p = xdr_inline_decode(xdr, 8);
5156 if (unlikely(!p))
5157 goto out_overflow;
5158 opnum = be32_to_cpup(p++);
5159 if (opnum != OP_SETCLIENTID) {
5160 dprintk("nfs: decode_setclientid: Server returned operation"
5161 " %d\n", opnum);
5162 return -EIO;
5163 }
5164 nfserr = be32_to_cpup(p);
5165 if (nfserr == NFS_OK) {
5166 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5167 if (unlikely(!p))
5168 goto out_overflow;
5169 p = xdr_decode_hyper(p, &res->clientid);
5170 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5171 } else if (nfserr == NFSERR_CLID_INUSE) {
5172 uint32_t len;
5173
5174 /* skip netid string */
5175 p = xdr_inline_decode(xdr, 4);
5176 if (unlikely(!p))
5177 goto out_overflow;
5178 len = be32_to_cpup(p);
5179 p = xdr_inline_decode(xdr, len);
5180 if (unlikely(!p))
5181 goto out_overflow;
5182
5183 /* skip uaddr string */
5184 p = xdr_inline_decode(xdr, 4);
5185 if (unlikely(!p))
5186 goto out_overflow;
5187 len = be32_to_cpup(p);
5188 p = xdr_inline_decode(xdr, len);
5189 if (unlikely(!p))
5190 goto out_overflow;
5191 return -NFSERR_CLID_INUSE;
5192 } else
5193 return nfs4_stat_to_errno(nfserr);
5194
5195 return 0;
5196out_overflow:
5197 print_overflow_msg(__func__, xdr);
5198 return -EIO;
5199}
5200
5201static int decode_setclientid_confirm(struct xdr_stream *xdr)
5202{
5203 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5204}
5205
5206static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5207{
5208 __be32 *p;
5209 int status;
5210
5211 status = decode_op_hdr(xdr, OP_WRITE);
5212 if (status)
5213 return status;
5214
5215 p = xdr_inline_decode(xdr, 16);
5216 if (unlikely(!p))
5217 goto out_overflow;
5218 res->count = be32_to_cpup(p++);
5219 res->verf->committed = be32_to_cpup(p++);
5220 memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5221 return 0;
5222out_overflow:
5223 print_overflow_msg(__func__, xdr);
5224 return -EIO;
5225}
5226
5227static int decode_delegreturn(struct xdr_stream *xdr)
5228{
5229 return decode_op_hdr(xdr, OP_DELEGRETURN);
5230}
5231
5232static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5233{
5234 __be32 *p;
5235
5236 p = xdr_inline_decode(xdr, 4);
5237 if (unlikely(!p))
5238 goto out_overflow;
5239 flavor->gss.sec_oid4.len = be32_to_cpup(p);
5240 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5241 goto out_err;
5242
5243 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5244 if (unlikely(!p))
5245 goto out_overflow;
5246 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5247
5248 p = xdr_inline_decode(xdr, 8);
5249 if (unlikely(!p))
5250 goto out_overflow;
5251 flavor->gss.qop4 = be32_to_cpup(p++);
5252 flavor->gss.service = be32_to_cpup(p);
5253
5254 return 0;
5255
5256out_overflow:
5257 print_overflow_msg(__func__, xdr);
5258 return -EIO;
5259out_err:
5260 return -EINVAL;
5261}
5262
5263static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5264{
5265 struct nfs4_secinfo_flavor *sec_flavor;
5266 int status;
5267 __be32 *p;
5268 int i, num_flavors;
5269
5270 p = xdr_inline_decode(xdr, 4);
5271 if (unlikely(!p))
5272 goto out_overflow;
5273
5274 res->flavors->num_flavors = 0;
5275 num_flavors = be32_to_cpup(p);
5276
5277 for (i = 0; i < num_flavors; i++) {
5278 sec_flavor = &res->flavors->flavors[i];
5279 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5280 break;
5281
5282 p = xdr_inline_decode(xdr, 4);
5283 if (unlikely(!p))
5284 goto out_overflow;
5285 sec_flavor->flavor = be32_to_cpup(p);
5286
5287 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5288 status = decode_secinfo_gss(xdr, sec_flavor);
5289 if (status)
5290 goto out;
5291 }
5292 res->flavors->num_flavors++;
5293 }
5294
5295 status = 0;
5296out:
5297 return status;
5298out_overflow:
5299 print_overflow_msg(__func__, xdr);
5300 return -EIO;
5301}
5302
5303static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5304{
5305 int status = decode_op_hdr(xdr, OP_SECINFO);
5306 if (status)
5307 return status;
5308 return decode_secinfo_common(xdr, res);
5309}
5310
5311#if defined(CONFIG_NFS_V4_1)
5312static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5313{
5314 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5315 if (status)
5316 return status;
5317 return decode_secinfo_common(xdr, res);
5318}
5319
5320static int decode_exchange_id(struct xdr_stream *xdr,
5321 struct nfs41_exchange_id_res *res)
5322{
5323 __be32 *p;
5324 uint32_t dummy;
5325 char *dummy_str;
5326 int status;
5327 uint32_t impl_id_count;
5328
5329 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5330 if (status)
5331 return status;
5332
5333 p = xdr_inline_decode(xdr, 8);
5334 if (unlikely(!p))
5335 goto out_overflow;
5336 xdr_decode_hyper(p, &res->clientid);
5337 p = xdr_inline_decode(xdr, 12);
5338 if (unlikely(!p))
5339 goto out_overflow;
5340 res->seqid = be32_to_cpup(p++);
5341 res->flags = be32_to_cpup(p++);
5342
5343 /* We ask for SP4_NONE */
5344 dummy = be32_to_cpup(p);
5345 if (dummy != SP4_NONE)
5346 return -EIO;
5347
5348 /* server_owner4.so_minor_id */
5349 p = xdr_inline_decode(xdr, 8);
5350 if (unlikely(!p))
5351 goto out_overflow;
5352 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5353
5354 /* server_owner4.so_major_id */
5355 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5356 if (unlikely(status))
5357 return status;
5358 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5359 return -EIO;
5360 memcpy(res->server_owner->major_id, dummy_str, dummy);
5361 res->server_owner->major_id_sz = dummy;
5362
5363 /* server_scope4 */
5364 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5365 if (unlikely(status))
5366 return status;
5367 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5368 return -EIO;
5369 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5370 res->server_scope->server_scope_sz = dummy;
5371
5372 /* Implementation Id */
5373 p = xdr_inline_decode(xdr, 4);
5374 if (unlikely(!p))
5375 goto out_overflow;
5376 impl_id_count = be32_to_cpup(p++);
5377
5378 if (impl_id_count) {
5379 /* nii_domain */
5380 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5381 if (unlikely(status))
5382 return status;
5383 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5384 return -EIO;
5385 memcpy(res->impl_id->domain, dummy_str, dummy);
5386
5387 /* nii_name */
5388 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5389 if (unlikely(status))
5390 return status;
5391 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5392 return -EIO;
5393 memcpy(res->impl_id->name, dummy_str, dummy);
5394
5395 /* nii_date */
5396 p = xdr_inline_decode(xdr, 12);
5397 if (unlikely(!p))
5398 goto out_overflow;
5399 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5400 res->impl_id->date.nseconds = be32_to_cpup(p);
5401
5402 /* if there's more than one entry, ignore the rest */
5403 }
5404 return 0;
5405out_overflow:
5406 print_overflow_msg(__func__, xdr);
5407 return -EIO;
5408}
5409
5410static int decode_chan_attrs(struct xdr_stream *xdr,
5411 struct nfs4_channel_attrs *attrs)
5412{
5413 __be32 *p;
5414 u32 nr_attrs, val;
5415
5416 p = xdr_inline_decode(xdr, 28);
5417 if (unlikely(!p))
5418 goto out_overflow;
5419 val = be32_to_cpup(p++); /* headerpadsz */
5420 if (val)
5421 return -EINVAL; /* no support for header padding yet */
5422 attrs->max_rqst_sz = be32_to_cpup(p++);
5423 attrs->max_resp_sz = be32_to_cpup(p++);
5424 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5425 attrs->max_ops = be32_to_cpup(p++);
5426 attrs->max_reqs = be32_to_cpup(p++);
5427 nr_attrs = be32_to_cpup(p);
5428 if (unlikely(nr_attrs > 1)) {
5429 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5430 "count %u\n", __func__, nr_attrs);
5431 return -EINVAL;
5432 }
5433 if (nr_attrs == 1) {
5434 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5435 if (unlikely(!p))
5436 goto out_overflow;
5437 }
5438 return 0;
5439out_overflow:
5440 print_overflow_msg(__func__, xdr);
5441 return -EIO;
5442}
5443
5444static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5445{
5446 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5447}
5448
5449static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5450 struct nfs41_bind_conn_to_session_res *res)
5451{
5452 __be32 *p;
5453 int status;
5454
5455 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5456 if (!status)
5457 status = decode_sessionid(xdr, &res->session->sess_id);
5458 if (unlikely(status))
5459 return status;
5460
5461 /* dir flags, rdma mode bool */
5462 p = xdr_inline_decode(xdr, 8);
5463 if (unlikely(!p))
5464 goto out_overflow;
5465
5466 res->dir = be32_to_cpup(p++);
5467 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5468 return -EIO;
5469 if (be32_to_cpup(p) == 0)
5470 res->use_conn_in_rdma_mode = false;
5471 else
5472 res->use_conn_in_rdma_mode = true;
5473
5474 return 0;
5475out_overflow:
5476 print_overflow_msg(__func__, xdr);
5477 return -EIO;
5478}
5479
5480static int decode_create_session(struct xdr_stream *xdr,
5481 struct nfs41_create_session_res *res)
5482{
5483 __be32 *p;
5484 int status;
5485 struct nfs_client *clp = res->client;
5486 struct nfs4_session *session = clp->cl_session;
5487
5488 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5489 if (!status)
5490 status = decode_sessionid(xdr, &session->sess_id);
5491 if (unlikely(status))
5492 return status;
5493
5494 /* seqid, flags */
5495 p = xdr_inline_decode(xdr, 8);
5496 if (unlikely(!p))
5497 goto out_overflow;
5498 clp->cl_seqid = be32_to_cpup(p++);
5499 session->flags = be32_to_cpup(p);
5500
5501 /* Channel attributes */
5502 status = decode_chan_attrs(xdr, &session->fc_attrs);
5503 if (!status)
5504 status = decode_chan_attrs(xdr, &session->bc_attrs);
5505 return status;
5506out_overflow:
5507 print_overflow_msg(__func__, xdr);
5508 return -EIO;
5509}
5510
5511static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5512{
5513 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5514}
5515
5516static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5517{
5518 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5519}
5520
5521static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5522{
5523 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5524}
5525#endif /* CONFIG_NFS_V4_1 */
5526
5527static int decode_sequence(struct xdr_stream *xdr,
5528 struct nfs4_sequence_res *res,
5529 struct rpc_rqst *rqstp)
5530{
5531#if defined(CONFIG_NFS_V4_1)
5532 struct nfs4_sessionid id;
5533 u32 dummy;
5534 int status;
5535 __be32 *p;
5536
5537 if (!res->sr_session)
5538 return 0;
5539
5540 status = decode_op_hdr(xdr, OP_SEQUENCE);
5541 if (!status)
5542 status = decode_sessionid(xdr, &id);
5543 if (unlikely(status))
5544 goto out_err;
5545
5546 /*
5547 * If the server returns different values for sessionID, slotID or
5548 * sequence number, the server is looney tunes.
5549 */
5550 status = -EREMOTEIO;
5551
5552 if (memcmp(id.data, res->sr_session->sess_id.data,
5553 NFS4_MAX_SESSIONID_LEN)) {
5554 dprintk("%s Invalid session id\n", __func__);
5555 goto out_err;
5556 }
5557
5558 p = xdr_inline_decode(xdr, 20);
5559 if (unlikely(!p))
5560 goto out_overflow;
5561
5562 /* seqid */
5563 dummy = be32_to_cpup(p++);
5564 if (dummy != res->sr_slot->seq_nr) {
5565 dprintk("%s Invalid sequence number\n", __func__);
5566 goto out_err;
5567 }
5568 /* slot id */
5569 dummy = be32_to_cpup(p++);
5570 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5571 dprintk("%s Invalid slot id\n", __func__);
5572 goto out_err;
5573 }
5574 /* highest slot id - currently not processed */
5575 dummy = be32_to_cpup(p++);
5576 /* target highest slot id - currently not processed */
5577 dummy = be32_to_cpup(p++);
5578 /* result flags */
5579 res->sr_status_flags = be32_to_cpup(p);
5580 status = 0;
5581out_err:
5582 res->sr_status = status;
5583 return status;
5584out_overflow:
5585 print_overflow_msg(__func__, xdr);
5586 status = -EIO;
5587 goto out_err;
5588#else /* CONFIG_NFS_V4_1 */
5589 return 0;
5590#endif /* CONFIG_NFS_V4_1 */
5591}
5592
5593#if defined(CONFIG_NFS_V4_1)
5594/*
5595 * TODO: Need to handle case when EOF != true;
5596 */
5597static int decode_getdevicelist(struct xdr_stream *xdr,
5598 struct pnfs_devicelist *res)
5599{
5600 __be32 *p;
5601 int status, i;
5602 struct nfs_writeverf verftemp;
5603
5604 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5605 if (status)
5606 return status;
5607
5608 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5609 if (unlikely(!p))
5610 goto out_overflow;
5611
5612 /* TODO: Skip cookie for now */
5613 p += 2;
5614
5615 /* Read verifier */
5616 p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5617
5618 res->num_devs = be32_to_cpup(p);
5619
5620 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5621
5622 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5623 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5624 __func__, res->num_devs);
5625 return -EIO;
5626 }
5627
5628 p = xdr_inline_decode(xdr,
5629 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5630 if (unlikely(!p))
5631 goto out_overflow;
5632 for (i = 0; i < res->num_devs; i++)
5633 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5634 NFS4_DEVICEID4_SIZE);
5635 res->eof = be32_to_cpup(p);
5636 return 0;
5637out_overflow:
5638 print_overflow_msg(__func__, xdr);
5639 return -EIO;
5640}
5641
5642static int decode_getdeviceinfo(struct xdr_stream *xdr,
5643 struct pnfs_device *pdev)
5644{
5645 __be32 *p;
5646 uint32_t len, type;
5647 int status;
5648
5649 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5650 if (status) {
5651 if (status == -ETOOSMALL) {
5652 p = xdr_inline_decode(xdr, 4);
5653 if (unlikely(!p))
5654 goto out_overflow;
5655 pdev->mincount = be32_to_cpup(p);
5656 dprintk("%s: Min count too small. mincnt = %u\n",
5657 __func__, pdev->mincount);
5658 }
5659 return status;
5660 }
5661
5662 p = xdr_inline_decode(xdr, 8);
5663 if (unlikely(!p))
5664 goto out_overflow;
5665 type = be32_to_cpup(p++);
5666 if (type != pdev->layout_type) {
5667 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5668 __func__, pdev->layout_type, type);
5669 return -EINVAL;
5670 }
5671 /*
5672 * Get the length of the opaque device_addr4. xdr_read_pages places
5673 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5674 * and places the remaining xdr data in xdr_buf->tail
5675 */
5676 pdev->mincount = be32_to_cpup(p);
5677 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5678
5679 /* Parse notification bitmap, verifying that it is zero. */
5680 p = xdr_inline_decode(xdr, 4);
5681 if (unlikely(!p))
5682 goto out_overflow;
5683 len = be32_to_cpup(p);
5684 if (len) {
5685 uint32_t i;
5686
5687 p = xdr_inline_decode(xdr, 4 * len);
5688 if (unlikely(!p))
5689 goto out_overflow;
5690 for (i = 0; i < len; i++, p++) {
5691 if (be32_to_cpup(p)) {
5692 dprintk("%s: notifications not supported\n",
5693 __func__);
5694 return -EIO;
5695 }
5696 }
5697 }
5698 return 0;
5699out_overflow:
5700 print_overflow_msg(__func__, xdr);
5701 return -EIO;
5702}
5703
5704static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5705 struct nfs4_layoutget_res *res)
5706{
5707 __be32 *p;
5708 int status;
5709 u32 layout_count;
5710 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5711 struct kvec *iov = rcvbuf->head;
5712 u32 hdrlen, recvd;
5713
5714 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5715 if (status)
5716 return status;
5717 p = xdr_inline_decode(xdr, 4);
5718 if (unlikely(!p))
5719 goto out_overflow;
5720 res->return_on_close = be32_to_cpup(p);
5721 decode_stateid(xdr, &res->stateid);
5722 p = xdr_inline_decode(xdr, 4);
5723 if (unlikely(!p))
5724 goto out_overflow;
5725 layout_count = be32_to_cpup(p);
5726 if (!layout_count) {
5727 dprintk("%s: server responded with empty layout array\n",
5728 __func__);
5729 return -EINVAL;
5730 }
5731
5732 p = xdr_inline_decode(xdr, 28);
5733 if (unlikely(!p))
5734 goto out_overflow;
5735 p = xdr_decode_hyper(p, &res->range.offset);
5736 p = xdr_decode_hyper(p, &res->range.length);
5737 res->range.iomode = be32_to_cpup(p++);
5738 res->type = be32_to_cpup(p++);
5739 res->layoutp->len = be32_to_cpup(p);
5740
5741 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5742 __func__,
5743 (unsigned long)res->range.offset,
5744 (unsigned long)res->range.length,
5745 res->range.iomode,
5746 res->type,
5747 res->layoutp->len);
5748
5749 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5750 recvd = req->rq_rcv_buf.len - hdrlen;
5751 if (res->layoutp->len > recvd) {
5752 dprintk("NFS: server cheating in layoutget reply: "
5753 "layout len %u > recvd %u\n",
5754 res->layoutp->len, recvd);
5755 return -EINVAL;
5756 }
5757
5758 xdr_read_pages(xdr, res->layoutp->len);
5759
5760 if (layout_count > 1) {
5761 /* We only handle a length one array at the moment. Any
5762 * further entries are just ignored. Note that this means
5763 * the client may see a response that is less than the
5764 * minimum it requested.
5765 */
5766 dprintk("%s: server responded with %d layouts, dropping tail\n",
5767 __func__, layout_count);
5768 }
5769
5770 return 0;
5771out_overflow:
5772 print_overflow_msg(__func__, xdr);
5773 return -EIO;
5774}
5775
5776static int decode_layoutreturn(struct xdr_stream *xdr,
5777 struct nfs4_layoutreturn_res *res)
5778{
5779 __be32 *p;
5780 int status;
5781
5782 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5783 if (status)
5784 return status;
5785 p = xdr_inline_decode(xdr, 4);
5786 if (unlikely(!p))
5787 goto out_overflow;
5788 res->lrs_present = be32_to_cpup(p);
5789 if (res->lrs_present)
5790 status = decode_stateid(xdr, &res->stateid);
5791 return status;
5792out_overflow:
5793 print_overflow_msg(__func__, xdr);
5794 return -EIO;
5795}
5796
5797static int decode_layoutcommit(struct xdr_stream *xdr,
5798 struct rpc_rqst *req,
5799 struct nfs4_layoutcommit_res *res)
5800{
5801 __be32 *p;
5802 __u32 sizechanged;
5803 int status;
5804
5805 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5806 res->status = status;
5807 if (status)
5808 return status;
5809
5810 p = xdr_inline_decode(xdr, 4);
5811 if (unlikely(!p))
5812 goto out_overflow;
5813 sizechanged = be32_to_cpup(p);
5814
5815 if (sizechanged) {
5816 /* throw away new size */
5817 p = xdr_inline_decode(xdr, 8);
5818 if (unlikely(!p))
5819 goto out_overflow;
5820 }
5821 return 0;
5822out_overflow:
5823 print_overflow_msg(__func__, xdr);
5824 return -EIO;
5825}
5826
5827static int decode_test_stateid(struct xdr_stream *xdr,
5828 struct nfs41_test_stateid_res *res)
5829{
5830 __be32 *p;
5831 int status;
5832 int num_res;
5833
5834 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5835 if (status)
5836 return status;
5837
5838 p = xdr_inline_decode(xdr, 4);
5839 if (unlikely(!p))
5840 goto out_overflow;
5841 num_res = be32_to_cpup(p++);
5842 if (num_res != 1)
5843 goto out;
5844
5845 p = xdr_inline_decode(xdr, 4);
5846 if (unlikely(!p))
5847 goto out_overflow;
5848 res->status = be32_to_cpup(p++);
5849
5850 return status;
5851out_overflow:
5852 print_overflow_msg(__func__, xdr);
5853out:
5854 return -EIO;
5855}
5856
5857static int decode_free_stateid(struct xdr_stream *xdr,
5858 struct nfs41_free_stateid_res *res)
5859{
5860 __be32 *p;
5861 int status;
5862
5863 status = decode_op_hdr(xdr, OP_FREE_STATEID);
5864 if (status)
5865 return status;
5866
5867 p = xdr_inline_decode(xdr, 4);
5868 if (unlikely(!p))
5869 goto out_overflow;
5870 res->status = be32_to_cpup(p++);
5871 return res->status;
5872out_overflow:
5873 print_overflow_msg(__func__, xdr);
5874 return -EIO;
5875}
5876#endif /* CONFIG_NFS_V4_1 */
5877
5878/*
5879 * END OF "GENERIC" DECODE ROUTINES.
5880 */
5881
5882/*
5883 * Decode OPEN_DOWNGRADE response
5884 */
5885static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5886 struct xdr_stream *xdr,
5887 struct nfs_closeres *res)
5888{
5889 struct compound_hdr hdr;
5890 int status;
5891
5892 status = decode_compound_hdr(xdr, &hdr);
5893 if (status)
5894 goto out;
5895 status = decode_sequence(xdr, &res->seq_res, rqstp);
5896 if (status)
5897 goto out;
5898 status = decode_putfh(xdr);
5899 if (status)
5900 goto out;
5901 status = decode_open_downgrade(xdr, res);
5902 if (status != 0)
5903 goto out;
5904 decode_getfattr(xdr, res->fattr, res->server);
5905out:
5906 return status;
5907}
5908
5909/*
5910 * Decode ACCESS response
5911 */
5912static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5913 struct nfs4_accessres *res)
5914{
5915 struct compound_hdr hdr;
5916 int status;
5917
5918 status = decode_compound_hdr(xdr, &hdr);
5919 if (status)
5920 goto out;
5921 status = decode_sequence(xdr, &res->seq_res, rqstp);
5922 if (status)
5923 goto out;
5924 status = decode_putfh(xdr);
5925 if (status != 0)
5926 goto out;
5927 status = decode_access(xdr, res);
5928 if (status != 0)
5929 goto out;
5930 decode_getfattr(xdr, res->fattr, res->server);
5931out:
5932 return status;
5933}
5934
5935/*
5936 * Decode LOOKUP response
5937 */
5938static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5939 struct nfs4_lookup_res *res)
5940{
5941 struct compound_hdr hdr;
5942 int status;
5943
5944 status = decode_compound_hdr(xdr, &hdr);
5945 if (status)
5946 goto out;
5947 status = decode_sequence(xdr, &res->seq_res, rqstp);
5948 if (status)
5949 goto out;
5950 status = decode_putfh(xdr);
5951 if (status)
5952 goto out;
5953 status = decode_lookup(xdr);
5954 if (status)
5955 goto out;
5956 status = decode_getfh(xdr, res->fh);
5957 if (status)
5958 goto out;
5959 status = decode_getfattr(xdr, res->fattr, res->server);
5960out:
5961 return status;
5962}
5963
5964/*
5965 * Decode LOOKUP_ROOT response
5966 */
5967static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5968 struct xdr_stream *xdr,
5969 struct nfs4_lookup_res *res)
5970{
5971 struct compound_hdr hdr;
5972 int status;
5973
5974 status = decode_compound_hdr(xdr, &hdr);
5975 if (status)
5976 goto out;
5977 status = decode_sequence(xdr, &res->seq_res, rqstp);
5978 if (status)
5979 goto out;
5980 status = decode_putrootfh(xdr);
5981 if (status)
5982 goto out;
5983 status = decode_getfh(xdr, res->fh);
5984 if (status == 0)
5985 status = decode_getfattr(xdr, res->fattr, res->server);
5986out:
5987 return status;
5988}
5989
5990/*
5991 * Decode REMOVE response
5992 */
5993static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5994 struct nfs_removeres *res)
5995{
5996 struct compound_hdr hdr;
5997 int status;
5998
5999 status = decode_compound_hdr(xdr, &hdr);
6000 if (status)
6001 goto out;
6002 status = decode_sequence(xdr, &res->seq_res, rqstp);
6003 if (status)
6004 goto out;
6005 status = decode_putfh(xdr);
6006 if (status)
6007 goto out;
6008 status = decode_remove(xdr, &res->cinfo);
6009out:
6010 return status;
6011}
6012
6013/*
6014 * Decode RENAME response
6015 */
6016static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6017 struct nfs_renameres *res)
6018{
6019 struct compound_hdr hdr;
6020 int status;
6021
6022 status = decode_compound_hdr(xdr, &hdr);
6023 if (status)
6024 goto out;
6025 status = decode_sequence(xdr, &res->seq_res, rqstp);
6026 if (status)
6027 goto out;
6028 status = decode_putfh(xdr);
6029 if (status)
6030 goto out;
6031 status = decode_savefh(xdr);
6032 if (status)
6033 goto out;
6034 status = decode_putfh(xdr);
6035 if (status)
6036 goto out;
6037 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6038out:
6039 return status;
6040}
6041
6042/*
6043 * Decode LINK response
6044 */
6045static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6046 struct nfs4_link_res *res)
6047{
6048 struct compound_hdr hdr;
6049 int status;
6050
6051 status = decode_compound_hdr(xdr, &hdr);
6052 if (status)
6053 goto out;
6054 status = decode_sequence(xdr, &res->seq_res, rqstp);
6055 if (status)
6056 goto out;
6057 status = decode_putfh(xdr);
6058 if (status)
6059 goto out;
6060 status = decode_savefh(xdr);
6061 if (status)
6062 goto out;
6063 status = decode_putfh(xdr);
6064 if (status)
6065 goto out;
6066 status = decode_link(xdr, &res->cinfo);
6067 if (status)
6068 goto out;
6069 /*
6070 * Note order: OP_LINK leaves the directory as the current
6071 * filehandle.
6072 */
6073 status = decode_restorefh(xdr);
6074 if (status)
6075 goto out;
6076 decode_getfattr(xdr, res->fattr, res->server);
6077out:
6078 return status;
6079}
6080
6081/*
6082 * Decode CREATE response
6083 */
6084static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6085 struct nfs4_create_res *res)
6086{
6087 struct compound_hdr hdr;
6088 int status;
6089
6090 status = decode_compound_hdr(xdr, &hdr);
6091 if (status)
6092 goto out;
6093 status = decode_sequence(xdr, &res->seq_res, rqstp);
6094 if (status)
6095 goto out;
6096 status = decode_putfh(xdr);
6097 if (status)
6098 goto out;
6099 status = decode_create(xdr, &res->dir_cinfo);
6100 if (status)
6101 goto out;
6102 status = decode_getfh(xdr, res->fh);
6103 if (status)
6104 goto out;
6105 decode_getfattr(xdr, res->fattr, res->server);
6106out:
6107 return status;
6108}
6109
6110/*
6111 * Decode SYMLINK response
6112 */
6113static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6114 struct nfs4_create_res *res)
6115{
6116 return nfs4_xdr_dec_create(rqstp, xdr, res);
6117}
6118
6119/*
6120 * Decode GETATTR response
6121 */
6122static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6123 struct nfs4_getattr_res *res)
6124{
6125 struct compound_hdr hdr;
6126 int status;
6127
6128 status = decode_compound_hdr(xdr, &hdr);
6129 if (status)
6130 goto out;
6131 status = decode_sequence(xdr, &res->seq_res, rqstp);
6132 if (status)
6133 goto out;
6134 status = decode_putfh(xdr);
6135 if (status)
6136 goto out;
6137 status = decode_getfattr(xdr, res->fattr, res->server);
6138out:
6139 return status;
6140}
6141
6142/*
6143 * Encode an SETACL request
6144 */
6145static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6146 struct nfs_setaclargs *args)
6147{
6148 struct compound_hdr hdr = {
6149 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6150 };
6151
6152 encode_compound_hdr(xdr, req, &hdr);
6153 encode_sequence(xdr, &args->seq_args, &hdr);
6154 encode_putfh(xdr, args->fh, &hdr);
6155 encode_setacl(xdr, args, &hdr);
6156 encode_nops(&hdr);
6157}
6158
6159/*
6160 * Decode SETACL response
6161 */
6162static int
6163nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6164 struct nfs_setaclres *res)
6165{
6166 struct compound_hdr hdr;
6167 int status;
6168
6169 status = decode_compound_hdr(xdr, &hdr);
6170 if (status)
6171 goto out;
6172 status = decode_sequence(xdr, &res->seq_res, rqstp);
6173 if (status)
6174 goto out;
6175 status = decode_putfh(xdr);
6176 if (status)
6177 goto out;
6178 status = decode_setattr(xdr);
6179out:
6180 return status;
6181}
6182
6183/*
6184 * Decode GETACL response
6185 */
6186static int
6187nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6188 struct nfs_getaclres *res)
6189{
6190 struct compound_hdr hdr;
6191 int status;
6192
6193 if (res->acl_scratch != NULL) {
6194 void *p = page_address(res->acl_scratch);
6195 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
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 status = decode_getacl(xdr, rqstp, res);
6207
6208out:
6209 return status;
6210}
6211
6212/*
6213 * Decode CLOSE response
6214 */
6215static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6216 struct nfs_closeres *res)
6217{
6218 struct compound_hdr hdr;
6219 int status;
6220
6221 status = decode_compound_hdr(xdr, &hdr);
6222 if (status)
6223 goto out;
6224 status = decode_sequence(xdr, &res->seq_res, rqstp);
6225 if (status)
6226 goto out;
6227 status = decode_putfh(xdr);
6228 if (status)
6229 goto out;
6230 status = decode_close(xdr, res);
6231 if (status != 0)
6232 goto out;
6233 /*
6234 * Note: Server may do delete on close for this file
6235 * in which case the getattr call will fail with
6236 * an ESTALE error. Shouldn't be a problem,
6237 * though, since fattr->valid will remain unset.
6238 */
6239 decode_getfattr(xdr, res->fattr, res->server);
6240out:
6241 return status;
6242}
6243
6244/*
6245 * Decode OPEN response
6246 */
6247static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6248 struct nfs_openres *res)
6249{
6250 struct compound_hdr hdr;
6251 int status;
6252
6253 status = decode_compound_hdr(xdr, &hdr);
6254 if (status)
6255 goto out;
6256 status = decode_sequence(xdr, &res->seq_res, rqstp);
6257 if (status)
6258 goto out;
6259 status = decode_putfh(xdr);
6260 if (status)
6261 goto out;
6262 status = decode_open(xdr, res);
6263 if (status)
6264 goto out;
6265 status = decode_getfh(xdr, &res->fh);
6266 if (status)
6267 goto out;
6268 decode_getfattr(xdr, res->f_attr, res->server);
6269out:
6270 return status;
6271}
6272
6273/*
6274 * Decode OPEN_CONFIRM response
6275 */
6276static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6277 struct xdr_stream *xdr,
6278 struct nfs_open_confirmres *res)
6279{
6280 struct compound_hdr hdr;
6281 int status;
6282
6283 status = decode_compound_hdr(xdr, &hdr);
6284 if (status)
6285 goto out;
6286 status = decode_putfh(xdr);
6287 if (status)
6288 goto out;
6289 status = decode_open_confirm(xdr, res);
6290out:
6291 return status;
6292}
6293
6294/*
6295 * Decode OPEN response
6296 */
6297static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6298 struct xdr_stream *xdr,
6299 struct nfs_openres *res)
6300{
6301 struct compound_hdr hdr;
6302 int status;
6303
6304 status = decode_compound_hdr(xdr, &hdr);
6305 if (status)
6306 goto out;
6307 status = decode_sequence(xdr, &res->seq_res, rqstp);
6308 if (status)
6309 goto out;
6310 status = decode_putfh(xdr);
6311 if (status)
6312 goto out;
6313 status = decode_open(xdr, res);
6314 if (status)
6315 goto out;
6316 decode_getfattr(xdr, res->f_attr, res->server);
6317out:
6318 return status;
6319}
6320
6321/*
6322 * Decode SETATTR response
6323 */
6324static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6325 struct xdr_stream *xdr,
6326 struct nfs_setattrres *res)
6327{
6328 struct compound_hdr hdr;
6329 int status;
6330
6331 status = decode_compound_hdr(xdr, &hdr);
6332 if (status)
6333 goto out;
6334 status = decode_sequence(xdr, &res->seq_res, rqstp);
6335 if (status)
6336 goto out;
6337 status = decode_putfh(xdr);
6338 if (status)
6339 goto out;
6340 status = decode_setattr(xdr);
6341 if (status)
6342 goto out;
6343 decode_getfattr(xdr, res->fattr, res->server);
6344out:
6345 return status;
6346}
6347
6348/*
6349 * Decode LOCK response
6350 */
6351static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6352 struct nfs_lock_res *res)
6353{
6354 struct compound_hdr hdr;
6355 int status;
6356
6357 status = decode_compound_hdr(xdr, &hdr);
6358 if (status)
6359 goto out;
6360 status = decode_sequence(xdr, &res->seq_res, rqstp);
6361 if (status)
6362 goto out;
6363 status = decode_putfh(xdr);
6364 if (status)
6365 goto out;
6366 status = decode_lock(xdr, res);
6367out:
6368 return status;
6369}
6370
6371/*
6372 * Decode LOCKT response
6373 */
6374static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375 struct nfs_lockt_res *res)
6376{
6377 struct compound_hdr hdr;
6378 int status;
6379
6380 status = decode_compound_hdr(xdr, &hdr);
6381 if (status)
6382 goto out;
6383 status = decode_sequence(xdr, &res->seq_res, rqstp);
6384 if (status)
6385 goto out;
6386 status = decode_putfh(xdr);
6387 if (status)
6388 goto out;
6389 status = decode_lockt(xdr, res);
6390out:
6391 return status;
6392}
6393
6394/*
6395 * Decode LOCKU response
6396 */
6397static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6398 struct nfs_locku_res *res)
6399{
6400 struct compound_hdr hdr;
6401 int status;
6402
6403 status = decode_compound_hdr(xdr, &hdr);
6404 if (status)
6405 goto out;
6406 status = decode_sequence(xdr, &res->seq_res, rqstp);
6407 if (status)
6408 goto out;
6409 status = decode_putfh(xdr);
6410 if (status)
6411 goto out;
6412 status = decode_locku(xdr, res);
6413out:
6414 return status;
6415}
6416
6417static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6418 struct xdr_stream *xdr, void *dummy)
6419{
6420 struct compound_hdr hdr;
6421 int status;
6422
6423 status = decode_compound_hdr(xdr, &hdr);
6424 if (!status)
6425 status = decode_release_lockowner(xdr);
6426 return status;
6427}
6428
6429/*
6430 * Decode READLINK response
6431 */
6432static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6433 struct xdr_stream *xdr,
6434 struct nfs4_readlink_res *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_readlink(xdr, rqstp);
6449out:
6450 return status;
6451}
6452
6453/*
6454 * Decode READDIR response
6455 */
6456static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6457 struct nfs4_readdir_res *res)
6458{
6459 struct compound_hdr hdr;
6460 int status;
6461
6462 status = decode_compound_hdr(xdr, &hdr);
6463 if (status)
6464 goto out;
6465 status = decode_sequence(xdr, &res->seq_res, rqstp);
6466 if (status)
6467 goto out;
6468 status = decode_putfh(xdr);
6469 if (status)
6470 goto out;
6471 status = decode_readdir(xdr, rqstp, res);
6472out:
6473 return status;
6474}
6475
6476/*
6477 * Decode Read response
6478 */
6479static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480 struct nfs_readres *res)
6481{
6482 struct compound_hdr hdr;
6483 int status;
6484
6485 status = decode_compound_hdr(xdr, &hdr);
6486 if (status)
6487 goto out;
6488 status = decode_sequence(xdr, &res->seq_res, rqstp);
6489 if (status)
6490 goto out;
6491 status = decode_putfh(xdr);
6492 if (status)
6493 goto out;
6494 status = decode_read(xdr, rqstp, res);
6495 if (!status)
6496 status = res->count;
6497out:
6498 return status;
6499}
6500
6501/*
6502 * Decode WRITE response
6503 */
6504static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6505 struct nfs_writeres *res)
6506{
6507 struct compound_hdr hdr;
6508 int status;
6509
6510 status = decode_compound_hdr(xdr, &hdr);
6511 if (status)
6512 goto out;
6513 status = decode_sequence(xdr, &res->seq_res, rqstp);
6514 if (status)
6515 goto out;
6516 status = decode_putfh(xdr);
6517 if (status)
6518 goto out;
6519 status = decode_write(xdr, res);
6520 if (status)
6521 goto out;
6522 if (res->fattr)
6523 decode_getfattr(xdr, res->fattr, res->server);
6524 if (!status)
6525 status = res->count;
6526out:
6527 return status;
6528}
6529
6530/*
6531 * Decode COMMIT response
6532 */
6533static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6534 struct nfs_commitres *res)
6535{
6536 struct compound_hdr hdr;
6537 int status;
6538
6539 status = decode_compound_hdr(xdr, &hdr);
6540 if (status)
6541 goto out;
6542 status = decode_sequence(xdr, &res->seq_res, rqstp);
6543 if (status)
6544 goto out;
6545 status = decode_putfh(xdr);
6546 if (status)
6547 goto out;
6548 status = decode_commit(xdr, res);
6549out:
6550 return status;
6551}
6552
6553/*
6554 * Decode FSINFO response
6555 */
6556static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6557 struct nfs4_fsinfo_res *res)
6558{
6559 struct compound_hdr hdr;
6560 int status;
6561
6562 status = decode_compound_hdr(xdr, &hdr);
6563 if (!status)
6564 status = decode_sequence(xdr, &res->seq_res, req);
6565 if (!status)
6566 status = decode_putfh(xdr);
6567 if (!status)
6568 status = decode_fsinfo(xdr, res->fsinfo);
6569 return status;
6570}
6571
6572/*
6573 * Decode PATHCONF response
6574 */
6575static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6576 struct nfs4_pathconf_res *res)
6577{
6578 struct compound_hdr hdr;
6579 int status;
6580
6581 status = decode_compound_hdr(xdr, &hdr);
6582 if (!status)
6583 status = decode_sequence(xdr, &res->seq_res, req);
6584 if (!status)
6585 status = decode_putfh(xdr);
6586 if (!status)
6587 status = decode_pathconf(xdr, res->pathconf);
6588 return status;
6589}
6590
6591/*
6592 * Decode STATFS response
6593 */
6594static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6595 struct nfs4_statfs_res *res)
6596{
6597 struct compound_hdr hdr;
6598 int status;
6599
6600 status = decode_compound_hdr(xdr, &hdr);
6601 if (!status)
6602 status = decode_sequence(xdr, &res->seq_res, req);
6603 if (!status)
6604 status = decode_putfh(xdr);
6605 if (!status)
6606 status = decode_statfs(xdr, res->fsstat);
6607 return status;
6608}
6609
6610/*
6611 * Decode GETATTR_BITMAP response
6612 */
6613static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6614 struct xdr_stream *xdr,
6615 struct nfs4_server_caps_res *res)
6616{
6617 struct compound_hdr hdr;
6618 int status;
6619
6620 status = decode_compound_hdr(xdr, &hdr);
6621 if (status)
6622 goto out;
6623 status = decode_sequence(xdr, &res->seq_res, req);
6624 if (status)
6625 goto out;
6626 status = decode_putfh(xdr);
6627 if (status)
6628 goto out;
6629 status = decode_server_caps(xdr, res);
6630out:
6631 return status;
6632}
6633
6634/*
6635 * Decode RENEW response
6636 */
6637static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6638 void *__unused)
6639{
6640 struct compound_hdr hdr;
6641 int status;
6642
6643 status = decode_compound_hdr(xdr, &hdr);
6644 if (!status)
6645 status = decode_renew(xdr);
6646 return status;
6647}
6648
6649/*
6650 * Decode SETCLIENTID response
6651 */
6652static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6653 struct xdr_stream *xdr,
6654 struct nfs4_setclientid_res *res)
6655{
6656 struct compound_hdr hdr;
6657 int status;
6658
6659 status = decode_compound_hdr(xdr, &hdr);
6660 if (!status)
6661 status = decode_setclientid(xdr, res);
6662 return status;
6663}
6664
6665/*
6666 * Decode SETCLIENTID_CONFIRM response
6667 */
6668static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6669 struct xdr_stream *xdr,
6670 struct nfs_fsinfo *fsinfo)
6671{
6672 struct compound_hdr hdr;
6673 int status;
6674
6675 status = decode_compound_hdr(xdr, &hdr);
6676 if (!status)
6677 status = decode_setclientid_confirm(xdr);
6678 if (!status)
6679 status = decode_putrootfh(xdr);
6680 if (!status)
6681 status = decode_fsinfo(xdr, fsinfo);
6682 return status;
6683}
6684
6685/*
6686 * Decode DELEGRETURN response
6687 */
6688static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6689 struct xdr_stream *xdr,
6690 struct nfs4_delegreturnres *res)
6691{
6692 struct compound_hdr hdr;
6693 int status;
6694
6695 status = decode_compound_hdr(xdr, &hdr);
6696 if (status)
6697 goto out;
6698 status = decode_sequence(xdr, &res->seq_res, rqstp);
6699 if (status)
6700 goto out;
6701 status = decode_putfh(xdr);
6702 if (status != 0)
6703 goto out;
6704 status = decode_getfattr(xdr, res->fattr, res->server);
6705 if (status != 0)
6706 goto out;
6707 status = decode_delegreturn(xdr);
6708out:
6709 return status;
6710}
6711
6712/*
6713 * Decode FS_LOCATIONS response
6714 */
6715static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6716 struct xdr_stream *xdr,
6717 struct nfs4_fs_locations_res *res)
6718{
6719 struct compound_hdr hdr;
6720 int status;
6721
6722 status = decode_compound_hdr(xdr, &hdr);
6723 if (status)
6724 goto out;
6725 status = decode_sequence(xdr, &res->seq_res, req);
6726 if (status)
6727 goto out;
6728 status = decode_putfh(xdr);
6729 if (status)
6730 goto out;
6731 status = decode_lookup(xdr);
6732 if (status)
6733 goto out;
6734 xdr_enter_page(xdr, PAGE_SIZE);
6735 status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6736 NULL, res->fs_locations,
6737 res->fs_locations->server);
6738out:
6739 return status;
6740}
6741
6742/*
6743 * Decode SECINFO response
6744 */
6745static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6746 struct xdr_stream *xdr,
6747 struct nfs4_secinfo_res *res)
6748{
6749 struct compound_hdr hdr;
6750 int status;
6751
6752 status = decode_compound_hdr(xdr, &hdr);
6753 if (status)
6754 goto out;
6755 status = decode_sequence(xdr, &res->seq_res, rqstp);
6756 if (status)
6757 goto out;
6758 status = decode_putfh(xdr);
6759 if (status)
6760 goto out;
6761 status = decode_secinfo(xdr, res);
6762out:
6763 return status;
6764}
6765
6766#if defined(CONFIG_NFS_V4_1)
6767/*
6768 * Decode BIND_CONN_TO_SESSION response
6769 */
6770static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6771 struct xdr_stream *xdr,
6772 void *res)
6773{
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (!status)
6779 status = decode_bind_conn_to_session(xdr, res);
6780 return status;
6781}
6782
6783/*
6784 * Decode EXCHANGE_ID response
6785 */
6786static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6787 struct xdr_stream *xdr,
6788 void *res)
6789{
6790 struct compound_hdr hdr;
6791 int status;
6792
6793 status = decode_compound_hdr(xdr, &hdr);
6794 if (!status)
6795 status = decode_exchange_id(xdr, res);
6796 return status;
6797}
6798
6799/*
6800 * Decode CREATE_SESSION response
6801 */
6802static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6803 struct xdr_stream *xdr,
6804 struct nfs41_create_session_res *res)
6805{
6806 struct compound_hdr hdr;
6807 int status;
6808
6809 status = decode_compound_hdr(xdr, &hdr);
6810 if (!status)
6811 status = decode_create_session(xdr, res);
6812 return status;
6813}
6814
6815/*
6816 * Decode DESTROY_SESSION response
6817 */
6818static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6819 struct xdr_stream *xdr,
6820 void *res)
6821{
6822 struct compound_hdr hdr;
6823 int status;
6824
6825 status = decode_compound_hdr(xdr, &hdr);
6826 if (!status)
6827 status = decode_destroy_session(xdr, res);
6828 return status;
6829}
6830
6831/*
6832 * Decode DESTROY_CLIENTID response
6833 */
6834static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6835 struct xdr_stream *xdr,
6836 void *res)
6837{
6838 struct compound_hdr hdr;
6839 int status;
6840
6841 status = decode_compound_hdr(xdr, &hdr);
6842 if (!status)
6843 status = decode_destroy_clientid(xdr, res);
6844 return status;
6845}
6846
6847/*
6848 * Decode SEQUENCE response
6849 */
6850static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6851 struct xdr_stream *xdr,
6852 struct nfs4_sequence_res *res)
6853{
6854 struct compound_hdr hdr;
6855 int status;
6856
6857 status = decode_compound_hdr(xdr, &hdr);
6858 if (!status)
6859 status = decode_sequence(xdr, res, rqstp);
6860 return status;
6861}
6862
6863/*
6864 * Decode GET_LEASE_TIME response
6865 */
6866static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6867 struct xdr_stream *xdr,
6868 struct nfs4_get_lease_time_res *res)
6869{
6870 struct compound_hdr hdr;
6871 int status;
6872
6873 status = decode_compound_hdr(xdr, &hdr);
6874 if (!status)
6875 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6876 if (!status)
6877 status = decode_putrootfh(xdr);
6878 if (!status)
6879 status = decode_fsinfo(xdr, res->lr_fsinfo);
6880 return status;
6881}
6882
6883/*
6884 * Decode RECLAIM_COMPLETE response
6885 */
6886static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6887 struct xdr_stream *xdr,
6888 struct nfs41_reclaim_complete_res *res)
6889{
6890 struct compound_hdr hdr;
6891 int status;
6892
6893 status = decode_compound_hdr(xdr, &hdr);
6894 if (!status)
6895 status = decode_sequence(xdr, &res->seq_res, rqstp);
6896 if (!status)
6897 status = decode_reclaim_complete(xdr, (void *)NULL);
6898 return status;
6899}
6900
6901/*
6902 * Decode GETDEVICELIST response
6903 */
6904static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6905 struct xdr_stream *xdr,
6906 struct nfs4_getdevicelist_res *res)
6907{
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 dprintk("encoding getdevicelist!\n");
6912
6913 status = decode_compound_hdr(xdr, &hdr);
6914 if (status != 0)
6915 goto out;
6916 status = decode_sequence(xdr, &res->seq_res, rqstp);
6917 if (status != 0)
6918 goto out;
6919 status = decode_putfh(xdr);
6920 if (status != 0)
6921 goto out;
6922 status = decode_getdevicelist(xdr, res->devlist);
6923out:
6924 return status;
6925}
6926
6927/*
6928 * Decode GETDEVINFO response
6929 */
6930static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6931 struct xdr_stream *xdr,
6932 struct nfs4_getdeviceinfo_res *res)
6933{
6934 struct compound_hdr hdr;
6935 int status;
6936
6937 status = decode_compound_hdr(xdr, &hdr);
6938 if (status != 0)
6939 goto out;
6940 status = decode_sequence(xdr, &res->seq_res, rqstp);
6941 if (status != 0)
6942 goto out;
6943 status = decode_getdeviceinfo(xdr, res->pdev);
6944out:
6945 return status;
6946}
6947
6948/*
6949 * Decode LAYOUTGET response
6950 */
6951static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6952 struct xdr_stream *xdr,
6953 struct nfs4_layoutget_res *res)
6954{
6955 struct compound_hdr hdr;
6956 int status;
6957
6958 status = decode_compound_hdr(xdr, &hdr);
6959 if (status)
6960 goto out;
6961 status = decode_sequence(xdr, &res->seq_res, rqstp);
6962 if (status)
6963 goto out;
6964 status = decode_putfh(xdr);
6965 if (status)
6966 goto out;
6967 status = decode_layoutget(xdr, rqstp, res);
6968out:
6969 return status;
6970}
6971
6972/*
6973 * Decode LAYOUTRETURN response
6974 */
6975static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6976 struct xdr_stream *xdr,
6977 struct nfs4_layoutreturn_res *res)
6978{
6979 struct compound_hdr hdr;
6980 int status;
6981
6982 status = decode_compound_hdr(xdr, &hdr);
6983 if (status)
6984 goto out;
6985 status = decode_sequence(xdr, &res->seq_res, rqstp);
6986 if (status)
6987 goto out;
6988 status = decode_putfh(xdr);
6989 if (status)
6990 goto out;
6991 status = decode_layoutreturn(xdr, res);
6992out:
6993 return status;
6994}
6995
6996/*
6997 * Decode LAYOUTCOMMIT response
6998 */
6999static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7000 struct xdr_stream *xdr,
7001 struct nfs4_layoutcommit_res *res)
7002{
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (status)
7008 goto out;
7009 status = decode_sequence(xdr, &res->seq_res, rqstp);
7010 if (status)
7011 goto out;
7012 status = decode_putfh(xdr);
7013 if (status)
7014 goto out;
7015 status = decode_layoutcommit(xdr, rqstp, res);
7016 if (status)
7017 goto out;
7018 decode_getfattr(xdr, res->fattr, res->server);
7019out:
7020 return status;
7021}
7022
7023/*
7024 * Decode SECINFO_NO_NAME response
7025 */
7026static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7027 struct xdr_stream *xdr,
7028 struct nfs4_secinfo_res *res)
7029{
7030 struct compound_hdr hdr;
7031 int status;
7032
7033 status = decode_compound_hdr(xdr, &hdr);
7034 if (status)
7035 goto out;
7036 status = decode_sequence(xdr, &res->seq_res, rqstp);
7037 if (status)
7038 goto out;
7039 status = decode_putrootfh(xdr);
7040 if (status)
7041 goto out;
7042 status = decode_secinfo_no_name(xdr, res);
7043out:
7044 return status;
7045}
7046
7047/*
7048 * Decode TEST_STATEID response
7049 */
7050static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7051 struct xdr_stream *xdr,
7052 struct nfs41_test_stateid_res *res)
7053{
7054 struct compound_hdr hdr;
7055 int status;
7056
7057 status = decode_compound_hdr(xdr, &hdr);
7058 if (status)
7059 goto out;
7060 status = decode_sequence(xdr, &res->seq_res, rqstp);
7061 if (status)
7062 goto out;
7063 status = decode_test_stateid(xdr, res);
7064out:
7065 return status;
7066}
7067
7068/*
7069 * Decode FREE_STATEID response
7070 */
7071static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7072 struct xdr_stream *xdr,
7073 struct nfs41_free_stateid_res *res)
7074{
7075 struct compound_hdr hdr;
7076 int status;
7077
7078 status = decode_compound_hdr(xdr, &hdr);
7079 if (status)
7080 goto out;
7081 status = decode_sequence(xdr, &res->seq_res, rqstp);
7082 if (status)
7083 goto out;
7084 status = decode_free_stateid(xdr, res);
7085out:
7086 return status;
7087}
7088#endif /* CONFIG_NFS_V4_1 */
7089
7090/**
7091 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7092 * the local page cache.
7093 * @xdr: XDR stream where entry resides
7094 * @entry: buffer to fill in with entry data
7095 * @plus: boolean indicating whether this should be a readdirplus entry
7096 *
7097 * Returns zero if successful, otherwise a negative errno value is
7098 * returned.
7099 *
7100 * This function is not invoked during READDIR reply decoding, but
7101 * rather whenever an application invokes the getdents(2) system call
7102 * on a directory already in our cache.
7103 */
7104int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7105 int plus)
7106{
7107 uint32_t bitmap[3] = {0};
7108 uint32_t len;
7109 __be32 *p = xdr_inline_decode(xdr, 4);
7110 if (unlikely(!p))
7111 goto out_overflow;
7112 if (*p == xdr_zero) {
7113 p = xdr_inline_decode(xdr, 4);
7114 if (unlikely(!p))
7115 goto out_overflow;
7116 if (*p == xdr_zero)
7117 return -EAGAIN;
7118 entry->eof = 1;
7119 return -EBADCOOKIE;
7120 }
7121
7122 p = xdr_inline_decode(xdr, 12);
7123 if (unlikely(!p))
7124 goto out_overflow;
7125 entry->prev_cookie = entry->cookie;
7126 p = xdr_decode_hyper(p, &entry->cookie);
7127 entry->len = be32_to_cpup(p);
7128
7129 p = xdr_inline_decode(xdr, entry->len);
7130 if (unlikely(!p))
7131 goto out_overflow;
7132 entry->name = (const char *) p;
7133
7134 /*
7135 * In case the server doesn't return an inode number,
7136 * we fake one here. (We don't use inode number 0,
7137 * since glibc seems to choke on it...)
7138 */
7139 entry->ino = 1;
7140 entry->fattr->valid = 0;
7141
7142 if (decode_attr_bitmap(xdr, bitmap) < 0)
7143 goto out_overflow;
7144
7145 if (decode_attr_length(xdr, &len, &p) < 0)
7146 goto out_overflow;
7147
7148 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7149 NULL, entry->server) < 0)
7150 goto out_overflow;
7151 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7152 entry->ino = entry->fattr->mounted_on_fileid;
7153 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7154 entry->ino = entry->fattr->fileid;
7155
7156 entry->d_type = DT_UNKNOWN;
7157 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7158 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7159
7160 return 0;
7161
7162out_overflow:
7163 print_overflow_msg(__func__, xdr);
7164 return -EAGAIN;
7165}
7166
7167/*
7168 * We need to translate between nfs status return values and
7169 * the local errno values which may not be the same.
7170 */
7171static struct {
7172 int stat;
7173 int errno;
7174} nfs_errtbl[] = {
7175 { NFS4_OK, 0 },
7176 { NFS4ERR_PERM, -EPERM },
7177 { NFS4ERR_NOENT, -ENOENT },
7178 { NFS4ERR_IO, -errno_NFSERR_IO},
7179 { NFS4ERR_NXIO, -ENXIO },
7180 { NFS4ERR_ACCESS, -EACCES },
7181 { NFS4ERR_EXIST, -EEXIST },
7182 { NFS4ERR_XDEV, -EXDEV },
7183 { NFS4ERR_NOTDIR, -ENOTDIR },
7184 { NFS4ERR_ISDIR, -EISDIR },
7185 { NFS4ERR_INVAL, -EINVAL },
7186 { NFS4ERR_FBIG, -EFBIG },
7187 { NFS4ERR_NOSPC, -ENOSPC },
7188 { NFS4ERR_ROFS, -EROFS },
7189 { NFS4ERR_MLINK, -EMLINK },
7190 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7191 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7192 { NFS4ERR_DQUOT, -EDQUOT },
7193 { NFS4ERR_STALE, -ESTALE },
7194 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7195 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7196 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7197 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7198 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7199 { NFS4ERR_BADTYPE, -EBADTYPE },
7200 { NFS4ERR_LOCKED, -EAGAIN },
7201 { NFS4ERR_SYMLINK, -ELOOP },
7202 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7203 { NFS4ERR_DEADLOCK, -EDEADLK },
7204 { -1, -EIO }
7205};
7206
7207/*
7208 * Convert an NFS error code to a local one.
7209 * This one is used jointly by NFSv2 and NFSv3.
7210 */
7211static int
7212nfs4_stat_to_errno(int stat)
7213{
7214 int i;
7215 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7216 if (nfs_errtbl[i].stat == stat)
7217 return nfs_errtbl[i].errno;
7218 }
7219 if (stat <= 10000 || stat > 10100) {
7220 /* The server is looney tunes. */
7221 return -EREMOTEIO;
7222 }
7223 /* If we cannot translate the error, the recovery routines should
7224 * handle it.
7225 * Note: remaining NFSv4 error codes have values > 10000, so should
7226 * not conflict with native Linux error codes.
7227 */
7228 return -stat;
7229}
7230
7231#define PROC(proc, argtype, restype) \
7232[NFSPROC4_CLNT_##proc] = { \
7233 .p_proc = NFSPROC4_COMPOUND, \
7234 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7235 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7236 .p_arglen = NFS4_##argtype##_sz, \
7237 .p_replen = NFS4_##restype##_sz, \
7238 .p_statidx = NFSPROC4_CLNT_##proc, \
7239 .p_name = #proc, \
7240}
7241
7242struct rpc_procinfo nfs4_procedures[] = {
7243 PROC(READ, enc_read, dec_read),
7244 PROC(WRITE, enc_write, dec_write),
7245 PROC(COMMIT, enc_commit, dec_commit),
7246 PROC(OPEN, enc_open, dec_open),
7247 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7248 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7249 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7250 PROC(CLOSE, enc_close, dec_close),
7251 PROC(SETATTR, enc_setattr, dec_setattr),
7252 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7253 PROC(RENEW, enc_renew, dec_renew),
7254 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7255 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7256 PROC(LOCK, enc_lock, dec_lock),
7257 PROC(LOCKT, enc_lockt, dec_lockt),
7258 PROC(LOCKU, enc_locku, dec_locku),
7259 PROC(ACCESS, enc_access, dec_access),
7260 PROC(GETATTR, enc_getattr, dec_getattr),
7261 PROC(LOOKUP, enc_lookup, dec_lookup),
7262 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7263 PROC(REMOVE, enc_remove, dec_remove),
7264 PROC(RENAME, enc_rename, dec_rename),
7265 PROC(LINK, enc_link, dec_link),
7266 PROC(SYMLINK, enc_symlink, dec_symlink),
7267 PROC(CREATE, enc_create, dec_create),
7268 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7269 PROC(STATFS, enc_statfs, dec_statfs),
7270 PROC(READLINK, enc_readlink, dec_readlink),
7271 PROC(READDIR, enc_readdir, dec_readdir),
7272 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7273 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7274 PROC(GETACL, enc_getacl, dec_getacl),
7275 PROC(SETACL, enc_setacl, dec_setacl),
7276 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7277 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7278 PROC(SECINFO, enc_secinfo, dec_secinfo),
7279#if defined(CONFIG_NFS_V4_1)
7280 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7281 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7282 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7283 PROC(SEQUENCE, enc_sequence, dec_sequence),
7284 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7285 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7286 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7287 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7288 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7289 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7290 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7291 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7292 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7293 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7294 PROC(BIND_CONN_TO_SESSION,
7295 enc_bind_conn_to_session, dec_bind_conn_to_session),
7296 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7297#endif /* CONFIG_NFS_V4_1 */
7298};
7299
7300const struct rpc_version nfs_version4 = {
7301 .number = 4,
7302 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7303 .procs = nfs4_procedures
7304};
7305
7306/*
7307 * Local variables:
7308 * c-basic-offset: 8
7309 * End:
7310 */