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Avoid reading past buffer when calling GETACL
[zen-stable.git] / fs / nfs / nfs4xdr.c
blob94da8675b89652ff76283f1813e569df0f8e6a73
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/sunrpc/clnt.h>
48 #include <linux/sunrpc/msg_prot.h>
49 #include <linux/sunrpc/gss_api.h>
50 #include <linux/nfs.h>
51 #include <linux/nfs4.h>
52 #include <linux/nfs_fs.h>
53 #include <linux/nfs_idmap.h>
54 #include "nfs4_fs.h"
55 #include "internal.h"
56 #include "pnfs.h"
57
58 #define NFSDBG_FACILITY NFSDBG_XDR
59
60 /* Mapping from NFS error code to "errno" error code. */
61 #define errno_NFSERR_IO EIO
62
63 static int nfs4_stat_to_errno(int);
64
65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
66 #ifdef DEBUG
67 #define NFS4_MAXTAGLEN 20
68 #else
69 #define NFS4_MAXTAGLEN 0
70 #endif
71
72 /* lock,open owner id:
73 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
74 */
75 #define open_owner_id_maxsz (1 + 1 + 4)
76 #define lock_owner_id_maxsz (1 + 1 + 4)
77 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
78 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
79 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
80 #define op_encode_hdr_maxsz (1)
81 #define op_decode_hdr_maxsz (2)
82 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
83 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
84 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
85 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
86 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
87 (NFS4_FHSIZE >> 2))
88 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
89 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
90 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
91 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
92 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
93 ((3+NFS4_FHSIZE) >> 2))
94 #define nfs4_fattr_bitmap_maxsz 4
95 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
96 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
97 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
98 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
99 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
100 /* This is based on getfattr, which uses the most attributes: */
101 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
102 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
103 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
104 nfs4_fattr_value_maxsz)
105 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
106 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
107 1 + 2 + 1 + \
108 nfs4_owner_maxsz + \
109 nfs4_group_maxsz + \
110 4 + 4)
111 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
112 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
113 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
114 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
115 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
116 /* The 5 accounts for the PNFS attributes, and assumes that at most three
117 * layout types will be returned.
118 */
119 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
120 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
121 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
122 #define decode_renew_maxsz (op_decode_hdr_maxsz)
123 #define encode_setclientid_maxsz \
124 (op_encode_hdr_maxsz + \
125 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
126 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
127 1 /* sc_prog */ + \
128 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
129 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
130 1) /* sc_cb_ident */
131 #define decode_setclientid_maxsz \
132 (op_decode_hdr_maxsz + \
133 2 + \
134 1024) /* large value for CLID_INUSE */
135 #define encode_setclientid_confirm_maxsz \
136 (op_encode_hdr_maxsz + \
137 3 + (NFS4_VERIFIER_SIZE >> 2))
138 #define decode_setclientid_confirm_maxsz \
139 (op_decode_hdr_maxsz)
140 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
141 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
142 #define encode_share_access_maxsz \
143 (2)
144 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
145 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
146 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
147 #define encode_open_maxsz (op_encode_hdr_maxsz + \
148 2 + encode_share_access_maxsz + 2 + \
149 open_owner_id_maxsz + \
150 encode_opentype_maxsz + \
151 encode_claim_null_maxsz)
152 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
153 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
154 decode_ace_maxsz)
155 #define decode_change_info_maxsz (5)
156 #define decode_open_maxsz (op_decode_hdr_maxsz + \
157 decode_stateid_maxsz + \
158 decode_change_info_maxsz + 1 + \
159 nfs4_fattr_bitmap_maxsz + \
160 decode_delegation_maxsz)
161 #define encode_open_confirm_maxsz \
162 (op_encode_hdr_maxsz + \
163 encode_stateid_maxsz + 1)
164 #define decode_open_confirm_maxsz \
165 (op_decode_hdr_maxsz + \
166 decode_stateid_maxsz)
167 #define encode_open_downgrade_maxsz \
168 (op_encode_hdr_maxsz + \
169 encode_stateid_maxsz + 1 + \
170 encode_share_access_maxsz)
171 #define decode_open_downgrade_maxsz \
172 (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz)
174 #define encode_close_maxsz (op_encode_hdr_maxsz + \
175 1 + encode_stateid_maxsz)
176 #define decode_close_maxsz (op_decode_hdr_maxsz + \
177 decode_stateid_maxsz)
178 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + \
180 encode_attrs_maxsz)
181 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
182 nfs4_fattr_bitmap_maxsz)
183 #define encode_read_maxsz (op_encode_hdr_maxsz + \
184 encode_stateid_maxsz + 3)
185 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
186 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
187 2 + encode_verifier_maxsz + 5)
188 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
189 decode_verifier_maxsz)
190 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
191 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
192 #define encode_write_maxsz (op_encode_hdr_maxsz + \
193 encode_stateid_maxsz + 4)
194 #define decode_write_maxsz (op_decode_hdr_maxsz + \
195 2 + decode_verifier_maxsz)
196 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
197 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
198 decode_verifier_maxsz)
199 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
200 nfs4_name_maxsz)
201 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
202 decode_change_info_maxsz)
203 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
204 2 * nfs4_name_maxsz)
205 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
206 decode_change_info_maxsz + \
207 decode_change_info_maxsz)
208 #define encode_link_maxsz (op_encode_hdr_maxsz + \
209 nfs4_name_maxsz)
210 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
211 #define encode_lockowner_maxsz (7)
212 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
213 7 + \
214 1 + encode_stateid_maxsz + 1 + \
215 encode_lockowner_maxsz)
216 #define decode_lock_denied_maxsz \
217 (8 + decode_lockowner_maxsz)
218 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
219 decode_lock_denied_maxsz)
220 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
221 encode_lockowner_maxsz)
222 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
223 decode_lock_denied_maxsz)
224 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
225 encode_stateid_maxsz + \
226 4)
227 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
228 decode_stateid_maxsz)
229 #define encode_release_lockowner_maxsz \
230 (op_encode_hdr_maxsz + \
231 encode_lockowner_maxsz)
232 #define decode_release_lockowner_maxsz \
233 (op_decode_hdr_maxsz)
234 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
235 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
236 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
237 1 + nfs4_name_maxsz + \
238 1 + \
239 nfs4_fattr_maxsz)
240 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
241 #define encode_create_maxsz (op_encode_hdr_maxsz + \
242 1 + 2 + nfs4_name_maxsz + \
243 encode_attrs_maxsz)
244 #define decode_create_maxsz (op_decode_hdr_maxsz + \
245 decode_change_info_maxsz + \
246 nfs4_fattr_bitmap_maxsz)
247 #define encode_statfs_maxsz (encode_getattr_maxsz)
248 #define decode_statfs_maxsz (decode_getattr_maxsz)
249 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
250 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
251 #define encode_getacl_maxsz (encode_getattr_maxsz)
252 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
253 nfs4_fattr_bitmap_maxsz + 1)
254 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
255 encode_stateid_maxsz + 3)
256 #define decode_setacl_maxsz (decode_setattr_maxsz)
257 #define encode_fs_locations_maxsz \
258 (encode_getattr_maxsz)
259 #define decode_fs_locations_maxsz \
260 (0)
261 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
262 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
263
264 #if defined(CONFIG_NFS_V4_1)
265 #define NFS4_MAX_MACHINE_NAME_LEN (64)
266
267 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
268 encode_verifier_maxsz + \
269 1 /* co_ownerid.len */ + \
270 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
271 1 /* flags */ + \
272 1 /* spa_how */ + \
273 0 /* SP4_NONE (for now) */ + \
274 1 /* zero implemetation id array */)
275 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
276 2 /* eir_clientid */ + \
277 1 /* eir_sequenceid */ + \
278 1 /* eir_flags */ + \
279 1 /* spr_how */ + \
280 0 /* SP4_NONE (for now) */ + \
281 2 /* eir_server_owner.so_minor_id */ + \
282 /* eir_server_owner.so_major_id<> */ \
283 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
284 /* eir_server_scope<> */ \
285 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
286 1 /* eir_server_impl_id array length */ + \
287 0 /* ignored eir_server_impl_id contents */)
288 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
289 #define decode_channel_attrs_maxsz (6 + \
290 1 /* ca_rdma_ird.len */ + \
291 1 /* ca_rdma_ird */)
292 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
293 2 /* csa_clientid */ + \
294 1 /* csa_sequence */ + \
295 1 /* csa_flags */ + \
296 encode_channel_attrs_maxsz + \
297 encode_channel_attrs_maxsz + \
298 1 /* csa_cb_program */ + \
299 1 /* csa_sec_parms.len (1) */ + \
300 1 /* cb_secflavor (AUTH_SYS) */ + \
301 1 /* stamp */ + \
302 1 /* machinename.len */ + \
303 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
304 1 /* uid */ + \
305 1 /* gid */ + \
306 1 /* gids.len (0) */)
307 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
308 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
309 1 /* csr_sequence */ + \
310 1 /* csr_flags */ + \
311 decode_channel_attrs_maxsz + \
312 decode_channel_attrs_maxsz)
313 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
314 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
315 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
316 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
317 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
318 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
319 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
320 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
321 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
322 encode_verifier_maxsz)
323 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
324 2 /* nfs_cookie4 gdlr_cookie */ + \
325 decode_verifier_maxsz \
326 /* verifier4 gdlr_verifier */ + \
327 1 /* gdlr_deviceid_list count */ + \
328 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
329 NFS4_DEVICEID4_SIZE) \
330 /* gdlr_deviceid_list */ + \
331 1 /* bool gdlr_eof */)
332 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
333 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
334 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
335 1 /* layout type */ + \
336 1 /* opaque devaddr4 length */ + \
337 /* devaddr4 payload is read into page */ \
338 1 /* notification bitmap length */ + \
339 1 /* notification bitmap */)
340 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
341 encode_stateid_maxsz)
342 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
343 decode_stateid_maxsz + \
344 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
345 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
346 2 /* offset */ + \
347 2 /* length */ + \
348 1 /* reclaim */ + \
349 encode_stateid_maxsz + \
350 1 /* new offset (true) */ + \
351 2 /* last byte written */ + \
352 1 /* nt_timechanged (false) */ + \
353 1 /* layoutupdate4 layout type */ + \
354 1 /* NULL filelayout layoutupdate4 payload */)
355 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
356 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
357 encode_stateid_maxsz + \
358 1 /* FIXME: opaque lrf_body always empty at the moment */)
359 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
360 1 + decode_stateid_maxsz)
361 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
362 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
363 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
364 XDR_QUADLEN(NFS4_STATEID_SIZE))
365 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
366 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
367 XDR_QUADLEN(NFS4_STATEID_SIZE))
368 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
369 #else /* CONFIG_NFS_V4_1 */
370 #define encode_sequence_maxsz 0
371 #define decode_sequence_maxsz 0
372 #endif /* CONFIG_NFS_V4_1 */
373
374 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
375 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
376 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
377 encode_sequence_maxsz + \
378 encode_putfh_maxsz + \
379 encode_read_maxsz)
380 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
381 decode_sequence_maxsz + \
382 decode_putfh_maxsz + \
383 decode_read_maxsz)
384 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
385 encode_sequence_maxsz + \
386 encode_putfh_maxsz + \
387 encode_readlink_maxsz)
388 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
389 decode_sequence_maxsz + \
390 decode_putfh_maxsz + \
391 decode_readlink_maxsz)
392 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
393 encode_sequence_maxsz + \
394 encode_putfh_maxsz + \
395 encode_readdir_maxsz)
396 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
397 decode_sequence_maxsz + \
398 decode_putfh_maxsz + \
399 decode_readdir_maxsz)
400 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
401 encode_sequence_maxsz + \
402 encode_putfh_maxsz + \
403 encode_write_maxsz + \
404 encode_getattr_maxsz)
405 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
406 decode_sequence_maxsz + \
407 decode_putfh_maxsz + \
408 decode_write_maxsz + \
409 decode_getattr_maxsz)
410 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
411 encode_sequence_maxsz + \
412 encode_putfh_maxsz + \
413 encode_commit_maxsz + \
414 encode_getattr_maxsz)
415 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
416 decode_sequence_maxsz + \
417 decode_putfh_maxsz + \
418 decode_commit_maxsz + \
419 decode_getattr_maxsz)
420 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
421 encode_sequence_maxsz + \
422 encode_putfh_maxsz + \
423 encode_savefh_maxsz + \
424 encode_open_maxsz + \
425 encode_getfh_maxsz + \
426 encode_getattr_maxsz + \
427 encode_restorefh_maxsz + \
428 encode_getattr_maxsz)
429 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_savefh_maxsz + \
433 decode_open_maxsz + \
434 decode_getfh_maxsz + \
435 decode_getattr_maxsz + \
436 decode_restorefh_maxsz + \
437 decode_getattr_maxsz)
438 #define NFS4_enc_open_confirm_sz \
439 (compound_encode_hdr_maxsz + \
440 encode_putfh_maxsz + \
441 encode_open_confirm_maxsz)
442 #define NFS4_dec_open_confirm_sz \
443 (compound_decode_hdr_maxsz + \
444 decode_putfh_maxsz + \
445 decode_open_confirm_maxsz)
446 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_open_maxsz + \
450 encode_getattr_maxsz)
451 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_open_maxsz + \
455 decode_getattr_maxsz)
456 #define NFS4_enc_open_downgrade_sz \
457 (compound_encode_hdr_maxsz + \
458 encode_sequence_maxsz + \
459 encode_putfh_maxsz + \
460 encode_open_downgrade_maxsz + \
461 encode_getattr_maxsz)
462 #define NFS4_dec_open_downgrade_sz \
463 (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_open_downgrade_maxsz + \
467 decode_getattr_maxsz)
468 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
469 encode_sequence_maxsz + \
470 encode_putfh_maxsz + \
471 encode_close_maxsz + \
472 encode_getattr_maxsz)
473 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
474 decode_sequence_maxsz + \
475 decode_putfh_maxsz + \
476 decode_close_maxsz + \
477 decode_getattr_maxsz)
478 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
479 encode_sequence_maxsz + \
480 encode_putfh_maxsz + \
481 encode_setattr_maxsz + \
482 encode_getattr_maxsz)
483 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
484 decode_sequence_maxsz + \
485 decode_putfh_maxsz + \
486 decode_setattr_maxsz + \
487 decode_getattr_maxsz)
488 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
489 encode_sequence_maxsz + \
490 encode_putfh_maxsz + \
491 encode_fsinfo_maxsz)
492 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
493 decode_sequence_maxsz + \
494 decode_putfh_maxsz + \
495 decode_fsinfo_maxsz)
496 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
497 encode_renew_maxsz)
498 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
499 decode_renew_maxsz)
500 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
501 encode_setclientid_maxsz)
502 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
503 decode_setclientid_maxsz)
504 #define NFS4_enc_setclientid_confirm_sz \
505 (compound_encode_hdr_maxsz + \
506 encode_setclientid_confirm_maxsz + \
507 encode_putrootfh_maxsz + \
508 encode_fsinfo_maxsz)
509 #define NFS4_dec_setclientid_confirm_sz \
510 (compound_decode_hdr_maxsz + \
511 decode_setclientid_confirm_maxsz + \
512 decode_putrootfh_maxsz + \
513 decode_fsinfo_maxsz)
514 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
515 encode_sequence_maxsz + \
516 encode_putfh_maxsz + \
517 encode_lock_maxsz)
518 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
519 decode_sequence_maxsz + \
520 decode_putfh_maxsz + \
521 decode_lock_maxsz)
522 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
523 encode_sequence_maxsz + \
524 encode_putfh_maxsz + \
525 encode_lockt_maxsz)
526 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
527 decode_sequence_maxsz + \
528 decode_putfh_maxsz + \
529 decode_lockt_maxsz)
530 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
531 encode_sequence_maxsz + \
532 encode_putfh_maxsz + \
533 encode_locku_maxsz)
534 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_locku_maxsz)
538 #define NFS4_enc_release_lockowner_sz \
539 (compound_encode_hdr_maxsz + \
540 encode_lockowner_maxsz)
541 #define NFS4_dec_release_lockowner_sz \
542 (compound_decode_hdr_maxsz + \
543 decode_lockowner_maxsz)
544 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
545 encode_sequence_maxsz + \
546 encode_putfh_maxsz + \
547 encode_access_maxsz + \
548 encode_getattr_maxsz)
549 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
550 decode_sequence_maxsz + \
551 decode_putfh_maxsz + \
552 decode_access_maxsz + \
553 decode_getattr_maxsz)
554 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
555 encode_sequence_maxsz + \
556 encode_putfh_maxsz + \
557 encode_getattr_maxsz)
558 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
559 decode_sequence_maxsz + \
560 decode_putfh_maxsz + \
561 decode_getattr_maxsz)
562 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
563 encode_sequence_maxsz + \
564 encode_putfh_maxsz + \
565 encode_lookup_maxsz + \
566 encode_getattr_maxsz + \
567 encode_getfh_maxsz)
568 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
569 decode_sequence_maxsz + \
570 decode_putfh_maxsz + \
571 decode_lookup_maxsz + \
572 decode_getattr_maxsz + \
573 decode_getfh_maxsz)
574 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
575 encode_sequence_maxsz + \
576 encode_putrootfh_maxsz + \
577 encode_getattr_maxsz + \
578 encode_getfh_maxsz)
579 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putrootfh_maxsz + \
582 decode_getattr_maxsz + \
583 decode_getfh_maxsz)
584 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
585 encode_sequence_maxsz + \
586 encode_putfh_maxsz + \
587 encode_remove_maxsz + \
588 encode_getattr_maxsz)
589 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
590 decode_sequence_maxsz + \
591 decode_putfh_maxsz + \
592 decode_remove_maxsz + \
593 decode_getattr_maxsz)
594 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
595 encode_sequence_maxsz + \
596 encode_putfh_maxsz + \
597 encode_savefh_maxsz + \
598 encode_putfh_maxsz + \
599 encode_rename_maxsz + \
600 encode_getattr_maxsz + \
601 encode_restorefh_maxsz + \
602 encode_getattr_maxsz)
603 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
604 decode_sequence_maxsz + \
605 decode_putfh_maxsz + \
606 decode_savefh_maxsz + \
607 decode_putfh_maxsz + \
608 decode_rename_maxsz + \
609 decode_getattr_maxsz + \
610 decode_restorefh_maxsz + \
611 decode_getattr_maxsz)
612 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
613 encode_sequence_maxsz + \
614 encode_putfh_maxsz + \
615 encode_savefh_maxsz + \
616 encode_putfh_maxsz + \
617 encode_link_maxsz + \
618 decode_getattr_maxsz + \
619 encode_restorefh_maxsz + \
620 decode_getattr_maxsz)
621 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
622 decode_sequence_maxsz + \
623 decode_putfh_maxsz + \
624 decode_savefh_maxsz + \
625 decode_putfh_maxsz + \
626 decode_link_maxsz + \
627 decode_getattr_maxsz + \
628 decode_restorefh_maxsz + \
629 decode_getattr_maxsz)
630 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
631 encode_sequence_maxsz + \
632 encode_putfh_maxsz + \
633 encode_symlink_maxsz + \
634 encode_getattr_maxsz + \
635 encode_getfh_maxsz)
636 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
637 decode_sequence_maxsz + \
638 decode_putfh_maxsz + \
639 decode_symlink_maxsz + \
640 decode_getattr_maxsz + \
641 decode_getfh_maxsz)
642 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
643 encode_sequence_maxsz + \
644 encode_putfh_maxsz + \
645 encode_savefh_maxsz + \
646 encode_create_maxsz + \
647 encode_getfh_maxsz + \
648 encode_getattr_maxsz + \
649 encode_restorefh_maxsz + \
650 encode_getattr_maxsz)
651 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
652 decode_sequence_maxsz + \
653 decode_putfh_maxsz + \
654 decode_savefh_maxsz + \
655 decode_create_maxsz + \
656 decode_getfh_maxsz + \
657 decode_getattr_maxsz + \
658 decode_restorefh_maxsz + \
659 decode_getattr_maxsz)
660 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
661 encode_sequence_maxsz + \
662 encode_putfh_maxsz + \
663 encode_getattr_maxsz)
664 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
665 decode_sequence_maxsz + \
666 decode_putfh_maxsz + \
667 decode_getattr_maxsz)
668 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
669 encode_sequence_maxsz + \
670 encode_putfh_maxsz + \
671 encode_statfs_maxsz)
672 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
673 decode_sequence_maxsz + \
674 decode_putfh_maxsz + \
675 decode_statfs_maxsz)
676 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
677 encode_sequence_maxsz + \
678 encode_putfh_maxsz + \
679 encode_getattr_maxsz)
680 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
681 decode_sequence_maxsz + \
682 decode_putfh_maxsz + \
683 decode_getattr_maxsz)
684 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
685 encode_sequence_maxsz + \
686 encode_putfh_maxsz + \
687 encode_delegreturn_maxsz + \
688 encode_getattr_maxsz)
689 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_delegreturn_maxsz + \
692 decode_getattr_maxsz)
693 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
694 encode_sequence_maxsz + \
695 encode_putfh_maxsz + \
696 encode_getacl_maxsz)
697 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
698 decode_sequence_maxsz + \
699 decode_putfh_maxsz + \
700 decode_getacl_maxsz)
701 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
702 encode_sequence_maxsz + \
703 encode_putfh_maxsz + \
704 encode_setacl_maxsz)
705 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
706 decode_sequence_maxsz + \
707 decode_putfh_maxsz + \
708 decode_setacl_maxsz)
709 #define NFS4_enc_fs_locations_sz \
710 (compound_encode_hdr_maxsz + \
711 encode_sequence_maxsz + \
712 encode_putfh_maxsz + \
713 encode_lookup_maxsz + \
714 encode_fs_locations_maxsz)
715 #define NFS4_dec_fs_locations_sz \
716 (compound_decode_hdr_maxsz + \
717 decode_sequence_maxsz + \
718 decode_putfh_maxsz + \
719 decode_lookup_maxsz + \
720 decode_fs_locations_maxsz)
721 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_secinfo_maxsz)
725 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_secinfo_maxsz)
729 #if defined(CONFIG_NFS_V4_1)
730 #define NFS4_enc_exchange_id_sz \
731 (compound_encode_hdr_maxsz + \
732 encode_exchange_id_maxsz)
733 #define NFS4_dec_exchange_id_sz \
734 (compound_decode_hdr_maxsz + \
735 decode_exchange_id_maxsz)
736 #define NFS4_enc_create_session_sz \
737 (compound_encode_hdr_maxsz + \
738 encode_create_session_maxsz)
739 #define NFS4_dec_create_session_sz \
740 (compound_decode_hdr_maxsz + \
741 decode_create_session_maxsz)
742 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
743 encode_destroy_session_maxsz)
744 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
745 decode_destroy_session_maxsz)
746 #define NFS4_enc_sequence_sz \
747 (compound_decode_hdr_maxsz + \
748 encode_sequence_maxsz)
749 #define NFS4_dec_sequence_sz \
750 (compound_decode_hdr_maxsz + \
751 decode_sequence_maxsz)
752 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
753 encode_sequence_maxsz + \
754 encode_putrootfh_maxsz + \
755 encode_fsinfo_maxsz)
756 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
757 decode_sequence_maxsz + \
758 decode_putrootfh_maxsz + \
759 decode_fsinfo_maxsz)
760 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
761 encode_sequence_maxsz + \
762 encode_reclaim_complete_maxsz)
763 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
764 decode_sequence_maxsz + \
765 decode_reclaim_complete_maxsz)
766 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
767 encode_sequence_maxsz + \
768 encode_putfh_maxsz + \
769 encode_getdevicelist_maxsz)
770 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
771 decode_sequence_maxsz + \
772 decode_putfh_maxsz + \
773 decode_getdevicelist_maxsz)
774 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
775 encode_sequence_maxsz +\
776 encode_getdeviceinfo_maxsz)
777 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
778 decode_sequence_maxsz + \
779 decode_getdeviceinfo_maxsz)
780 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
781 encode_sequence_maxsz + \
782 encode_putfh_maxsz + \
783 encode_layoutget_maxsz)
784 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
785 decode_sequence_maxsz + \
786 decode_putfh_maxsz + \
787 decode_layoutget_maxsz)
788 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
789 encode_sequence_maxsz +\
790 encode_putfh_maxsz + \
791 encode_layoutcommit_maxsz + \
792 encode_getattr_maxsz)
793 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
794 decode_sequence_maxsz + \
795 decode_putfh_maxsz + \
796 decode_layoutcommit_maxsz + \
797 decode_getattr_maxsz)
798 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
799 encode_sequence_maxsz + \
800 encode_putfh_maxsz + \
801 encode_layoutreturn_maxsz)
802 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
803 decode_sequence_maxsz + \
804 decode_putfh_maxsz + \
805 decode_layoutreturn_maxsz)
806 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
807 encode_sequence_maxsz + \
808 encode_putrootfh_maxsz +\
809 encode_secinfo_no_name_maxsz)
810 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
811 decode_sequence_maxsz + \
812 decode_putrootfh_maxsz + \
813 decode_secinfo_no_name_maxsz)
814 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
815 encode_sequence_maxsz + \
816 encode_test_stateid_maxsz)
817 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
818 decode_sequence_maxsz + \
819 decode_test_stateid_maxsz)
820 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
821 encode_sequence_maxsz + \
822 encode_free_stateid_maxsz)
823 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
824 decode_sequence_maxsz + \
825 decode_free_stateid_maxsz)
826
827 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
828 compound_encode_hdr_maxsz +
829 encode_sequence_maxsz +
830 encode_putfh_maxsz +
831 encode_getattr_maxsz) *
832 XDR_UNIT);
833
834 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
835 compound_decode_hdr_maxsz +
836 decode_sequence_maxsz +
837 decode_putfh_maxsz) *
838 XDR_UNIT);
839 #endif /* CONFIG_NFS_V4_1 */
840
841 static const umode_t nfs_type2fmt[] = {
842 [NF4BAD] = 0,
843 [NF4REG] = S_IFREG,
844 [NF4DIR] = S_IFDIR,
845 [NF4BLK] = S_IFBLK,
846 [NF4CHR] = S_IFCHR,
847 [NF4LNK] = S_IFLNK,
848 [NF4SOCK] = S_IFSOCK,
849 [NF4FIFO] = S_IFIFO,
850 [NF4ATTRDIR] = 0,
851 [NF4NAMEDATTR] = 0,
852 };
853
854 struct compound_hdr {
855 int32_t status;
856 uint32_t nops;
857 __be32 * nops_p;
858 uint32_t taglen;
859 char * tag;
860 uint32_t replen; /* expected reply words */
861 u32 minorversion;
862 };
863
864 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
865 {
866 __be32 *p = xdr_reserve_space(xdr, nbytes);
867 BUG_ON(!p);
868 return p;
869 }
870
871 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
872 {
873 __be32 *p;
874
875 p = xdr_reserve_space(xdr, 4 + len);
876 BUG_ON(p == NULL);
877 xdr_encode_opaque(p, str, len);
878 }
879
880 static void encode_compound_hdr(struct xdr_stream *xdr,
881 struct rpc_rqst *req,
882 struct compound_hdr *hdr)
883 {
884 __be32 *p;
885 struct rpc_auth *auth = req->rq_cred->cr_auth;
886
887 /* initialize running count of expected bytes in reply.
888 * NOTE: the replied tag SHOULD be the same is the one sent,
889 * but this is not required as a MUST for the server to do so. */
890 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
891
892 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
893 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
894 p = reserve_space(xdr, 4 + hdr->taglen + 8);
895 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
896 *p++ = cpu_to_be32(hdr->minorversion);
897 hdr->nops_p = p;
898 *p = cpu_to_be32(hdr->nops);
899 }
900
901 static void encode_nops(struct compound_hdr *hdr)
902 {
903 BUG_ON(hdr->nops > NFS4_MAX_OPS);
904 *hdr->nops_p = htonl(hdr->nops);
905 }
906
907 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
908 {
909 __be32 *p;
910
911 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
912 BUG_ON(p == NULL);
913 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
914 }
915
916 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
917 {
918 char owner_name[IDMAP_NAMESZ];
919 char owner_group[IDMAP_NAMESZ];
920 int owner_namelen = 0;
921 int owner_grouplen = 0;
922 __be32 *p;
923 __be32 *q;
924 int len;
925 uint32_t bmval0 = 0;
926 uint32_t bmval1 = 0;
927
928 /*
929 * We reserve enough space to write the entire attribute buffer at once.
930 * In the worst-case, this would be
931 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
932 * = 36 bytes, plus any contribution from variable-length fields
933 * such as owner/group.
934 */
935 len = 16;
936
937 /* Sigh */
938 if (iap->ia_valid & ATTR_SIZE)
939 len += 8;
940 if (iap->ia_valid & ATTR_MODE)
941 len += 4;
942 if (iap->ia_valid & ATTR_UID) {
943 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
944 if (owner_namelen < 0) {
945 dprintk("nfs: couldn't resolve uid %d to string\n",
946 iap->ia_uid);
947 /* XXX */
948 strcpy(owner_name, "nobody");
949 owner_namelen = sizeof("nobody") - 1;
950 /* goto out; */
951 }
952 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
953 }
954 if (iap->ia_valid & ATTR_GID) {
955 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
956 if (owner_grouplen < 0) {
957 dprintk("nfs: couldn't resolve gid %d to string\n",
958 iap->ia_gid);
959 strcpy(owner_group, "nobody");
960 owner_grouplen = sizeof("nobody") - 1;
961 /* goto out; */
962 }
963 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
964 }
965 if (iap->ia_valid & ATTR_ATIME_SET)
966 len += 16;
967 else if (iap->ia_valid & ATTR_ATIME)
968 len += 4;
969 if (iap->ia_valid & ATTR_MTIME_SET)
970 len += 16;
971 else if (iap->ia_valid & ATTR_MTIME)
972 len += 4;
973 p = reserve_space(xdr, len);
974
975 /*
976 * We write the bitmap length now, but leave the bitmap and the attribute
977 * buffer length to be backfilled at the end of this routine.
978 */
979 *p++ = cpu_to_be32(2);
980 q = p;
981 p += 3;
982
983 if (iap->ia_valid & ATTR_SIZE) {
984 bmval0 |= FATTR4_WORD0_SIZE;
985 p = xdr_encode_hyper(p, iap->ia_size);
986 }
987 if (iap->ia_valid & ATTR_MODE) {
988 bmval1 |= FATTR4_WORD1_MODE;
989 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
990 }
991 if (iap->ia_valid & ATTR_UID) {
992 bmval1 |= FATTR4_WORD1_OWNER;
993 p = xdr_encode_opaque(p, owner_name, owner_namelen);
994 }
995 if (iap->ia_valid & ATTR_GID) {
996 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
997 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
998 }
999 if (iap->ia_valid & ATTR_ATIME_SET) {
1000 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1001 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1002 *p++ = cpu_to_be32(0);
1003 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1004 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1005 }
1006 else if (iap->ia_valid & ATTR_ATIME) {
1007 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1008 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1009 }
1010 if (iap->ia_valid & ATTR_MTIME_SET) {
1011 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1012 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1013 *p++ = cpu_to_be32(0);
1014 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1015 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1016 }
1017 else if (iap->ia_valid & ATTR_MTIME) {
1018 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1019 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1020 }
1021
1022 /*
1023 * Now we backfill the bitmap and the attribute buffer length.
1024 */
1025 if (len != ((char *)p - (char *)q) + 4) {
1026 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
1027 len, ((char *)p - (char *)q) + 4);
1028 BUG();
1029 }
1030 len = (char *)p - (char *)q - 12;
1031 *q++ = htonl(bmval0);
1032 *q++ = htonl(bmval1);
1033 *q = htonl(len);
1034
1035 /* out: */
1036 }
1037
1038 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1039 {
1040 __be32 *p;
1041
1042 p = reserve_space(xdr, 8);
1043 *p++ = cpu_to_be32(OP_ACCESS);
1044 *p = cpu_to_be32(access);
1045 hdr->nops++;
1046 hdr->replen += decode_access_maxsz;
1047 }
1048
1049 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1050 {
1051 __be32 *p;
1052
1053 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
1054 *p++ = cpu_to_be32(OP_CLOSE);
1055 *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1056 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1057 hdr->nops++;
1058 hdr->replen += decode_close_maxsz;
1059 }
1060
1061 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1062 {
1063 __be32 *p;
1064
1065 p = reserve_space(xdr, 16);
1066 *p++ = cpu_to_be32(OP_COMMIT);
1067 p = xdr_encode_hyper(p, args->offset);
1068 *p = cpu_to_be32(args->count);
1069 hdr->nops++;
1070 hdr->replen += decode_commit_maxsz;
1071 }
1072
1073 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1074 {
1075 __be32 *p;
1076
1077 p = reserve_space(xdr, 8);
1078 *p++ = cpu_to_be32(OP_CREATE);
1079 *p = cpu_to_be32(create->ftype);
1080
1081 switch (create->ftype) {
1082 case NF4LNK:
1083 p = reserve_space(xdr, 4);
1084 *p = cpu_to_be32(create->u.symlink.len);
1085 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1086 break;
1087
1088 case NF4BLK: case NF4CHR:
1089 p = reserve_space(xdr, 8);
1090 *p++ = cpu_to_be32(create->u.device.specdata1);
1091 *p = cpu_to_be32(create->u.device.specdata2);
1092 break;
1093
1094 default:
1095 break;
1096 }
1097
1098 encode_string(xdr, create->name->len, create->name->name);
1099 hdr->nops++;
1100 hdr->replen += decode_create_maxsz;
1101
1102 encode_attrs(xdr, create->attrs, create->server);
1103 }
1104
1105 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1106 {
1107 __be32 *p;
1108
1109 p = reserve_space(xdr, 12);
1110 *p++ = cpu_to_be32(OP_GETATTR);
1111 *p++ = cpu_to_be32(1);
1112 *p = cpu_to_be32(bitmap);
1113 hdr->nops++;
1114 hdr->replen += decode_getattr_maxsz;
1115 }
1116
1117 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1118 {
1119 __be32 *p;
1120
1121 p = reserve_space(xdr, 16);
1122 *p++ = cpu_to_be32(OP_GETATTR);
1123 *p++ = cpu_to_be32(2);
1124 *p++ = cpu_to_be32(bm0);
1125 *p = cpu_to_be32(bm1);
1126 hdr->nops++;
1127 hdr->replen += decode_getattr_maxsz;
1128 }
1129
1130 static void
1131 encode_getattr_three(struct xdr_stream *xdr,
1132 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1133 struct compound_hdr *hdr)
1134 {
1135 __be32 *p;
1136
1137 p = reserve_space(xdr, 4);
1138 *p = cpu_to_be32(OP_GETATTR);
1139 if (bm2) {
1140 p = reserve_space(xdr, 16);
1141 *p++ = cpu_to_be32(3);
1142 *p++ = cpu_to_be32(bm0);
1143 *p++ = cpu_to_be32(bm1);
1144 *p = cpu_to_be32(bm2);
1145 } else if (bm1) {
1146 p = reserve_space(xdr, 12);
1147 *p++ = cpu_to_be32(2);
1148 *p++ = cpu_to_be32(bm0);
1149 *p = cpu_to_be32(bm1);
1150 } else {
1151 p = reserve_space(xdr, 8);
1152 *p++ = cpu_to_be32(1);
1153 *p = cpu_to_be32(bm0);
1154 }
1155 hdr->nops++;
1156 hdr->replen += decode_getattr_maxsz;
1157 }
1158
1159 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1160 {
1161 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1162 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1163 }
1164
1165 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1166 {
1167 encode_getattr_three(xdr,
1168 bitmask[0] & nfs4_fsinfo_bitmap[0],
1169 bitmask[1] & nfs4_fsinfo_bitmap[1],
1170 bitmask[2] & nfs4_fsinfo_bitmap[2],
1171 hdr);
1172 }
1173
1174 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1175 {
1176 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1177 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1178 }
1179
1180 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1181 {
1182 __be32 *p;
1183
1184 p = reserve_space(xdr, 4);
1185 *p = cpu_to_be32(OP_GETFH);
1186 hdr->nops++;
1187 hdr->replen += decode_getfh_maxsz;
1188 }
1189
1190 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1191 {
1192 __be32 *p;
1193
1194 p = reserve_space(xdr, 8 + name->len);
1195 *p++ = cpu_to_be32(OP_LINK);
1196 xdr_encode_opaque(p, name->name, name->len);
1197 hdr->nops++;
1198 hdr->replen += decode_link_maxsz;
1199 }
1200
1201 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1202 {
1203 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1204 return block ? NFS4_READW_LT : NFS4_READ_LT;
1205 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1206 }
1207
1208 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1209 {
1210 if (fl->fl_end == OFFSET_MAX)
1211 return ~(uint64_t)0;
1212 return fl->fl_end - fl->fl_start + 1;
1213 }
1214
1215 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1216 {
1217 __be32 *p;
1218
1219 p = reserve_space(xdr, 32);
1220 p = xdr_encode_hyper(p, lowner->clientid);
1221 *p++ = cpu_to_be32(20);
1222 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1223 *p++ = cpu_to_be32(lowner->s_dev);
1224 xdr_encode_hyper(p, lowner->id);
1225 }
1226
1227 /*
1228 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1229 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1230 */
1231 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1232 {
1233 __be32 *p;
1234
1235 p = reserve_space(xdr, 32);
1236 *p++ = cpu_to_be32(OP_LOCK);
1237 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1238 *p++ = cpu_to_be32(args->reclaim);
1239 p = xdr_encode_hyper(p, args->fl->fl_start);
1240 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1241 *p = cpu_to_be32(args->new_lock_owner);
1242 if (args->new_lock_owner){
1243 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1244 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1245 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1246 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1247 encode_lockowner(xdr, &args->lock_owner);
1248 }
1249 else {
1250 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1251 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1252 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1253 }
1254 hdr->nops++;
1255 hdr->replen += decode_lock_maxsz;
1256 }
1257
1258 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1259 {
1260 __be32 *p;
1261
1262 p = reserve_space(xdr, 24);
1263 *p++ = cpu_to_be32(OP_LOCKT);
1264 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1265 p = xdr_encode_hyper(p, args->fl->fl_start);
1266 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1267 encode_lockowner(xdr, &args->lock_owner);
1268 hdr->nops++;
1269 hdr->replen += decode_lockt_maxsz;
1270 }
1271
1272 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1273 {
1274 __be32 *p;
1275
1276 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1277 *p++ = cpu_to_be32(OP_LOCKU);
1278 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1279 *p++ = cpu_to_be32(args->seqid->sequence->counter);
1280 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1281 p = xdr_encode_hyper(p, args->fl->fl_start);
1282 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1283 hdr->nops++;
1284 hdr->replen += decode_locku_maxsz;
1285 }
1286
1287 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1288 {
1289 __be32 *p;
1290
1291 p = reserve_space(xdr, 4);
1292 *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1293 encode_lockowner(xdr, lowner);
1294 hdr->nops++;
1295 hdr->replen += decode_release_lockowner_maxsz;
1296 }
1297
1298 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1299 {
1300 int len = name->len;
1301 __be32 *p;
1302
1303 p = reserve_space(xdr, 8 + len);
1304 *p++ = cpu_to_be32(OP_LOOKUP);
1305 xdr_encode_opaque(p, name->name, len);
1306 hdr->nops++;
1307 hdr->replen += decode_lookup_maxsz;
1308 }
1309
1310 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1311 {
1312 __be32 *p;
1313
1314 p = reserve_space(xdr, 8);
1315 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1316 case FMODE_READ:
1317 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1318 break;
1319 case FMODE_WRITE:
1320 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1321 break;
1322 case FMODE_READ|FMODE_WRITE:
1323 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1324 break;
1325 default:
1326 *p++ = cpu_to_be32(0);
1327 }
1328 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1329 }
1330
1331 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1332 {
1333 __be32 *p;
1334 /*
1335 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1336 * owner 4 = 32
1337 */
1338 p = reserve_space(xdr, 8);
1339 *p++ = cpu_to_be32(OP_OPEN);
1340 *p = cpu_to_be32(arg->seqid->sequence->counter);
1341 encode_share_access(xdr, arg->fmode);
1342 p = reserve_space(xdr, 32);
1343 p = xdr_encode_hyper(p, arg->clientid);
1344 *p++ = cpu_to_be32(20);
1345 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1346 *p++ = cpu_to_be32(arg->server->s_dev);
1347 xdr_encode_hyper(p, arg->id);
1348 }
1349
1350 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1351 {
1352 __be32 *p;
1353 struct nfs_client *clp;
1354
1355 p = reserve_space(xdr, 4);
1356 switch(arg->open_flags & O_EXCL) {
1357 case 0:
1358 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1359 encode_attrs(xdr, arg->u.attrs, arg->server);
1360 break;
1361 default:
1362 clp = arg->server->nfs_client;
1363 if (clp->cl_mvops->minor_version > 0) {
1364 if (nfs4_has_persistent_session(clp)) {
1365 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1366 encode_attrs(xdr, arg->u.attrs, arg->server);
1367 } else {
1368 struct iattr dummy;
1369
1370 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1371 encode_nfs4_verifier(xdr, &arg->u.verifier);
1372 dummy.ia_valid = 0;
1373 encode_attrs(xdr, &dummy, arg->server);
1374 }
1375 } else {
1376 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1377 encode_nfs4_verifier(xdr, &arg->u.verifier);
1378 }
1379 }
1380 }
1381
1382 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384 __be32 *p;
1385
1386 p = reserve_space(xdr, 4);
1387 switch (arg->open_flags & O_CREAT) {
1388 case 0:
1389 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1390 break;
1391 default:
1392 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1393 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1394 encode_createmode(xdr, arg);
1395 }
1396 }
1397
1398 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1399 {
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 switch (delegation_type) {
1404 case 0:
1405 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1406 break;
1407 case FMODE_READ:
1408 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1409 break;
1410 case FMODE_WRITE|FMODE_READ:
1411 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1412 break;
1413 default:
1414 BUG();
1415 }
1416 }
1417
1418 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1419 {
1420 __be32 *p;
1421
1422 p = reserve_space(xdr, 4);
1423 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1424 encode_string(xdr, name->len, name->name);
1425 }
1426
1427 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1428 {
1429 __be32 *p;
1430
1431 p = reserve_space(xdr, 4);
1432 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1433 encode_delegation_type(xdr, type);
1434 }
1435
1436 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1437 {
1438 __be32 *p;
1439
1440 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1441 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1442 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1443 encode_string(xdr, name->len, name->name);
1444 }
1445
1446 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1447 {
1448 encode_openhdr(xdr, arg);
1449 encode_opentype(xdr, arg);
1450 switch (arg->claim) {
1451 case NFS4_OPEN_CLAIM_NULL:
1452 encode_claim_null(xdr, arg->name);
1453 break;
1454 case NFS4_OPEN_CLAIM_PREVIOUS:
1455 encode_claim_previous(xdr, arg->u.delegation_type);
1456 break;
1457 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1458 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1459 break;
1460 default:
1461 BUG();
1462 }
1463 hdr->nops++;
1464 hdr->replen += decode_open_maxsz;
1465 }
1466
1467 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1468 {
1469 __be32 *p;
1470
1471 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1472 *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1473 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1474 *p = cpu_to_be32(arg->seqid->sequence->counter);
1475 hdr->nops++;
1476 hdr->replen += decode_open_confirm_maxsz;
1477 }
1478
1479 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1484 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1485 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1486 *p = cpu_to_be32(arg->seqid->sequence->counter);
1487 encode_share_access(xdr, arg->fmode);
1488 hdr->nops++;
1489 hdr->replen += decode_open_downgrade_maxsz;
1490 }
1491
1492 static void
1493 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1494 {
1495 int len = fh->size;
1496 __be32 *p;
1497
1498 p = reserve_space(xdr, 8 + len);
1499 *p++ = cpu_to_be32(OP_PUTFH);
1500 xdr_encode_opaque(p, fh->data, len);
1501 hdr->nops++;
1502 hdr->replen += decode_putfh_maxsz;
1503 }
1504
1505 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507 __be32 *p;
1508
1509 p = reserve_space(xdr, 4);
1510 *p = cpu_to_be32(OP_PUTROOTFH);
1511 hdr->nops++;
1512 hdr->replen += decode_putrootfh_maxsz;
1513 }
1514
1515 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1516 {
1517 nfs4_stateid stateid;
1518 __be32 *p;
1519
1520 p = reserve_space(xdr, NFS4_STATEID_SIZE);
1521 if (ctx->state != NULL) {
1522 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1523 if (zero_seqid)
1524 stateid.stateid.seqid = 0;
1525 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1526 } else
1527 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1528 }
1529
1530 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1531 {
1532 __be32 *p;
1533
1534 p = reserve_space(xdr, 4);
1535 *p = cpu_to_be32(OP_READ);
1536
1537 encode_stateid(xdr, args->context, args->lock_context,
1538 hdr->minorversion);
1539
1540 p = reserve_space(xdr, 12);
1541 p = xdr_encode_hyper(p, args->offset);
1542 *p = cpu_to_be32(args->count);
1543 hdr->nops++;
1544 hdr->replen += decode_read_maxsz;
1545 }
1546
1547 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1548 {
1549 uint32_t attrs[2] = {
1550 FATTR4_WORD0_RDATTR_ERROR,
1551 FATTR4_WORD1_MOUNTED_ON_FILEID,
1552 };
1553 uint32_t dircount = readdir->count >> 1;
1554 __be32 *p;
1555
1556 if (readdir->plus) {
1557 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1558 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1559 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1560 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1561 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1562 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1563 dircount >>= 1;
1564 }
1565 /* Use mounted_on_fileid only if the server supports it */
1566 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1567 attrs[0] |= FATTR4_WORD0_FILEID;
1568
1569 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1570 *p++ = cpu_to_be32(OP_READDIR);
1571 p = xdr_encode_hyper(p, readdir->cookie);
1572 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1573 *p++ = cpu_to_be32(dircount);
1574 *p++ = cpu_to_be32(readdir->count);
1575 *p++ = cpu_to_be32(2);
1576
1577 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1578 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1579 hdr->nops++;
1580 hdr->replen += decode_readdir_maxsz;
1581 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1582 __func__,
1583 (unsigned long long)readdir->cookie,
1584 ((u32 *)readdir->verifier.data)[0],
1585 ((u32 *)readdir->verifier.data)[1],
1586 attrs[0] & readdir->bitmask[0],
1587 attrs[1] & readdir->bitmask[1]);
1588 }
1589
1590 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592 __be32 *p;
1593
1594 p = reserve_space(xdr, 4);
1595 *p = cpu_to_be32(OP_READLINK);
1596 hdr->nops++;
1597 hdr->replen += decode_readlink_maxsz;
1598 }
1599
1600 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1601 {
1602 __be32 *p;
1603
1604 p = reserve_space(xdr, 8 + name->len);
1605 *p++ = cpu_to_be32(OP_REMOVE);
1606 xdr_encode_opaque(p, name->name, name->len);
1607 hdr->nops++;
1608 hdr->replen += decode_remove_maxsz;
1609 }
1610
1611 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1612 {
1613 __be32 *p;
1614
1615 p = reserve_space(xdr, 4);
1616 *p = cpu_to_be32(OP_RENAME);
1617 encode_string(xdr, oldname->len, oldname->name);
1618 encode_string(xdr, newname->len, newname->name);
1619 hdr->nops++;
1620 hdr->replen += decode_rename_maxsz;
1621 }
1622
1623 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1624 {
1625 __be32 *p;
1626
1627 p = reserve_space(xdr, 12);
1628 *p++ = cpu_to_be32(OP_RENEW);
1629 xdr_encode_hyper(p, client_stateid->cl_clientid);
1630 hdr->nops++;
1631 hdr->replen += decode_renew_maxsz;
1632 }
1633
1634 static void
1635 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1636 {
1637 __be32 *p;
1638
1639 p = reserve_space(xdr, 4);
1640 *p = cpu_to_be32(OP_RESTOREFH);
1641 hdr->nops++;
1642 hdr->replen += decode_restorefh_maxsz;
1643 }
1644
1645 static void
1646 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1647 {
1648 __be32 *p;
1649
1650 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1651 *p++ = cpu_to_be32(OP_SETATTR);
1652 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1653 p = reserve_space(xdr, 2*4);
1654 *p++ = cpu_to_be32(1);
1655 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656 BUG_ON(arg->acl_len % 4);
1657 p = reserve_space(xdr, 4);
1658 *p = cpu_to_be32(arg->acl_len);
1659 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660 hdr->nops++;
1661 hdr->replen += decode_setacl_maxsz;
1662 }
1663
1664 static void
1665 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1666 {
1667 __be32 *p;
1668
1669 p = reserve_space(xdr, 4);
1670 *p = cpu_to_be32(OP_SAVEFH);
1671 hdr->nops++;
1672 hdr->replen += decode_savefh_maxsz;
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677 __be32 *p;
1678
1679 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1680 *p++ = cpu_to_be32(OP_SETATTR);
1681 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1682 hdr->nops++;
1683 hdr->replen += decode_setattr_maxsz;
1684 encode_attrs(xdr, arg->iap, server);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689 __be32 *p;
1690
1691 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1692 *p++ = cpu_to_be32(OP_SETCLIENTID);
1693 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1694
1695 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1696 p = reserve_space(xdr, 4);
1697 *p = cpu_to_be32(setclientid->sc_prog);
1698 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700 p = reserve_space(xdr, 4);
1701 *p = cpu_to_be32(setclientid->sc_cb_ident);
1702 hdr->nops++;
1703 hdr->replen += decode_setclientid_maxsz;
1704 }
1705
1706 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1707 {
1708 __be32 *p;
1709
1710 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1711 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1712 p = xdr_encode_hyper(p, arg->clientid);
1713 xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1714 hdr->nops++;
1715 hdr->replen += decode_setclientid_confirm_maxsz;
1716 }
1717
1718 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1719 {
1720 __be32 *p;
1721
1722 p = reserve_space(xdr, 4);
1723 *p = cpu_to_be32(OP_WRITE);
1724
1725 encode_stateid(xdr, args->context, args->lock_context,
1726 hdr->minorversion);
1727
1728 p = reserve_space(xdr, 16);
1729 p = xdr_encode_hyper(p, args->offset);
1730 *p++ = cpu_to_be32(args->stable);
1731 *p = cpu_to_be32(args->count);
1732
1733 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734 hdr->nops++;
1735 hdr->replen += decode_write_maxsz;
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740 __be32 *p;
1741
1742 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1743
1744 *p++ = cpu_to_be32(OP_DELEGRETURN);
1745 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1746 hdr->nops++;
1747 hdr->replen += decode_delegreturn_maxsz;
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752 int len = name->len;
1753 __be32 *p;
1754
1755 p = reserve_space(xdr, 8 + len);
1756 *p++ = cpu_to_be32(OP_SECINFO);
1757 xdr_encode_opaque(p, name->name, len);
1758 hdr->nops++;
1759 hdr->replen += decode_secinfo_maxsz;
1760 }
1761
1762 #if defined(CONFIG_NFS_V4_1)
1763 /* NFSv4.1 operations */
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765 struct nfs41_exchange_id_args *args,
1766 struct compound_hdr *hdr)
1767 {
1768 __be32 *p;
1769
1770 p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1771 *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1772 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1773
1774 encode_string(xdr, args->id_len, args->id);
1775
1776 p = reserve_space(xdr, 12);
1777 *p++ = cpu_to_be32(args->flags);
1778 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1779 *p = cpu_to_be32(0); /* zero length implementation id array */
1780 hdr->nops++;
1781 hdr->replen += decode_exchange_id_maxsz;
1782 }
1783
1784 static void encode_create_session(struct xdr_stream *xdr,
1785 struct nfs41_create_session_args *args,
1786 struct compound_hdr *hdr)
1787 {
1788 __be32 *p;
1789 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1790 uint32_t len;
1791 struct nfs_client *clp = args->client;
1792 u32 max_resp_sz_cached;
1793
1794 /*
1795 * Assumes OPEN is the biggest non-idempotent compound.
1796 * 2 is the verifier.
1797 */
1798 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1799 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1800
1801 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1802 clp->cl_ipaddr);
1803
1804 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1805 *p++ = cpu_to_be32(OP_CREATE_SESSION);
1806 p = xdr_encode_hyper(p, clp->cl_clientid);
1807 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1808 *p++ = cpu_to_be32(args->flags); /*flags */
1809
1810 /* Fore Channel */
1811 *p++ = cpu_to_be32(0); /* header padding size */
1812 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1813 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1814 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1815 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1816 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1817 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1818
1819 /* Back Channel */
1820 *p++ = cpu_to_be32(0); /* header padding size */
1821 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1822 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1823 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1824 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1825 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1826 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1827
1828 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1829 *p++ = cpu_to_be32(1);
1830 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1831
1832 /* authsys_parms rfc1831 */
1833 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1834 p = xdr_encode_opaque(p, machine_name, len);
1835 *p++ = cpu_to_be32(0); /* UID */
1836 *p++ = cpu_to_be32(0); /* GID */
1837 *p = cpu_to_be32(0); /* No more gids */
1838 hdr->nops++;
1839 hdr->replen += decode_create_session_maxsz;
1840 }
1841
1842 static void encode_destroy_session(struct xdr_stream *xdr,
1843 struct nfs4_session *session,
1844 struct compound_hdr *hdr)
1845 {
1846 __be32 *p;
1847 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1848 *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1849 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1850 hdr->nops++;
1851 hdr->replen += decode_destroy_session_maxsz;
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855 struct nfs41_reclaim_complete_args *args,
1856 struct compound_hdr *hdr)
1857 {
1858 __be32 *p;
1859
1860 p = reserve_space(xdr, 8);
1861 *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1862 *p++ = cpu_to_be32(args->one_fs);
1863 hdr->nops++;
1864 hdr->replen += decode_reclaim_complete_maxsz;
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869 const struct nfs4_sequence_args *args,
1870 struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873 struct nfs4_session *session = args->sa_session;
1874 struct nfs4_slot_table *tp;
1875 struct nfs4_slot *slot;
1876 __be32 *p;
1877
1878 if (!session)
1879 return;
1880
1881 tp = &session->fc_slot_table;
1882
1883 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1884 slot = tp->slots + args->sa_slotid;
1885
1886 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1887 *p++ = cpu_to_be32(OP_SEQUENCE);
1888
1889 /*
1890 * Sessionid + seqid + slotid + max slotid + cache_this
1891 */
1892 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1893 "max_slotid=%d cache_this=%d\n",
1894 __func__,
1895 ((u32 *)session->sess_id.data)[0],
1896 ((u32 *)session->sess_id.data)[1],
1897 ((u32 *)session->sess_id.data)[2],
1898 ((u32 *)session->sess_id.data)[3],
1899 slot->seq_nr, args->sa_slotid,
1900 tp->highest_used_slotid, args->sa_cache_this);
1901 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1902 *p++ = cpu_to_be32(slot->seq_nr);
1903 *p++ = cpu_to_be32(args->sa_slotid);
1904 *p++ = cpu_to_be32(tp->highest_used_slotid);
1905 *p = cpu_to_be32(args->sa_cache_this);
1906 hdr->nops++;
1907 hdr->replen += decode_sequence_maxsz;
1908 #endif /* CONFIG_NFS_V4_1 */
1909 }
1910
1911 #ifdef CONFIG_NFS_V4_1
1912 static void
1913 encode_getdevicelist(struct xdr_stream *xdr,
1914 const struct nfs4_getdevicelist_args *args,
1915 struct compound_hdr *hdr)
1916 {
1917 __be32 *p;
1918 nfs4_verifier dummy = {
1919 .data = "dummmmmy",
1920 };
1921
1922 p = reserve_space(xdr, 20);
1923 *p++ = cpu_to_be32(OP_GETDEVICELIST);
1924 *p++ = cpu_to_be32(args->layoutclass);
1925 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1926 xdr_encode_hyper(p, 0ULL); /* cookie */
1927 encode_nfs4_verifier(xdr, &dummy);
1928 hdr->nops++;
1929 hdr->replen += decode_getdevicelist_maxsz;
1930 }
1931
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934 const struct nfs4_getdeviceinfo_args *args,
1935 struct compound_hdr *hdr)
1936 {
1937 __be32 *p;
1938
1939 p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1940 *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1941 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942 NFS4_DEVICEID4_SIZE);
1943 *p++ = cpu_to_be32(args->pdev->layout_type);
1944 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1945 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1946 hdr->nops++;
1947 hdr->replen += decode_getdeviceinfo_maxsz;
1948 }
1949
1950 static void
1951 encode_layoutget(struct xdr_stream *xdr,
1952 const struct nfs4_layoutget_args *args,
1953 struct compound_hdr *hdr)
1954 {
1955 __be32 *p;
1956
1957 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1958 *p++ = cpu_to_be32(OP_LAYOUTGET);
1959 *p++ = cpu_to_be32(0); /* Signal layout available */
1960 *p++ = cpu_to_be32(args->type);
1961 *p++ = cpu_to_be32(args->range.iomode);
1962 p = xdr_encode_hyper(p, args->range.offset);
1963 p = xdr_encode_hyper(p, args->range.length);
1964 p = xdr_encode_hyper(p, args->minlength);
1965 p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1966 *p = cpu_to_be32(args->maxcount);
1967
1968 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1969 __func__,
1970 args->type,
1971 args->range.iomode,
1972 (unsigned long)args->range.offset,
1973 (unsigned long)args->range.length,
1974 args->maxcount);
1975 hdr->nops++;
1976 hdr->replen += decode_layoutget_maxsz;
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981 struct inode *inode,
1982 const struct nfs4_layoutcommit_args *args,
1983 struct compound_hdr *hdr)
1984 {
1985 __be32 *p;
1986
1987 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990 p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1991 *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1992 /* Only whole file layouts */
1993 p = xdr_encode_hyper(p, 0); /* offset */
1994 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1995 *p++ = cpu_to_be32(0); /* reclaim */
1996 p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1997 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1998 p = xdr_encode_hyper(p, args->lastbytewritten);
1999 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2000 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2001
2002 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2003 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2004 NFS_I(inode)->layout, xdr, args);
2005 else {
2006 p = reserve_space(xdr, 4);
2007 *p = cpu_to_be32(0); /* no layout-type payload */
2008 }
2009
2010 hdr->nops++;
2011 hdr->replen += decode_layoutcommit_maxsz;
2012 return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017 const struct nfs4_layoutreturn_args *args,
2018 struct compound_hdr *hdr)
2019 {
2020 __be32 *p;
2021
2022 p = reserve_space(xdr, 20);
2023 *p++ = cpu_to_be32(OP_LAYOUTRETURN);
2024 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2025 *p++ = cpu_to_be32(args->layout_type);
2026 *p++ = cpu_to_be32(IOMODE_ANY);
2027 *p = cpu_to_be32(RETURN_FILE);
2028 p = reserve_space(xdr, 16 + NFS4_STATEID_SIZE);
2029 p = xdr_encode_hyper(p, 0);
2030 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2031 spin_lock(&args->inode->i_lock);
2032 xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
2033 spin_unlock(&args->inode->i_lock);
2034 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2035 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2036 NFS_I(args->inode)->layout, xdr, args);
2037 } else {
2038 p = reserve_space(xdr, 4);
2039 *p = cpu_to_be32(0);
2040 }
2041 hdr->nops++;
2042 hdr->replen += decode_layoutreturn_maxsz;
2043 }
2044
2045 static int
2046 encode_secinfo_no_name(struct xdr_stream *xdr,
2047 const struct nfs41_secinfo_no_name_args *args,
2048 struct compound_hdr *hdr)
2049 {
2050 __be32 *p;
2051 p = reserve_space(xdr, 8);
2052 *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
2053 *p++ = cpu_to_be32(args->style);
2054 hdr->nops++;
2055 hdr->replen += decode_secinfo_no_name_maxsz;
2056 return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060 struct nfs41_test_stateid_args *args,
2061 struct compound_hdr *hdr)
2062 {
2063 __be32 *p;
2064
2065 p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
2066 *p++ = cpu_to_be32(OP_TEST_STATEID);
2067 *p++ = cpu_to_be32(1);
2068 xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2069 hdr->nops++;
2070 hdr->replen += decode_test_stateid_maxsz;
2071 }
2072
2073 static void encode_free_stateid(struct xdr_stream *xdr,
2074 struct nfs41_free_stateid_args *args,
2075 struct compound_hdr *hdr)
2076 {
2077 __be32 *p;
2078 p = reserve_space(xdr, 4 + NFS4_STATEID_SIZE);
2079 *p++ = cpu_to_be32(OP_FREE_STATEID);
2080 xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
2081 hdr->nops++;
2082 hdr->replen += decode_free_stateid_maxsz;
2083 }
2084 #endif /* CONFIG_NFS_V4_1 */
2085
2086 /*
2087 * END OF "GENERIC" ENCODE ROUTINES.
2088 */
2089
2090 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2091 {
2092 #if defined(CONFIG_NFS_V4_1)
2093 if (args->sa_session)
2094 return args->sa_session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096 return 0;
2097 }
2098
2099 /*
2100 * Encode an ACCESS request
2101 */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103 const struct nfs4_accessargs *args)
2104 {
2105 struct compound_hdr hdr = {
2106 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107 };
2108
2109 encode_compound_hdr(xdr, req, &hdr);
2110 encode_sequence(xdr, &args->seq_args, &hdr);
2111 encode_putfh(xdr, args->fh, &hdr);
2112 encode_access(xdr, args->access, &hdr);
2113 encode_getfattr(xdr, args->bitmask, &hdr);
2114 encode_nops(&hdr);
2115 }
2116
2117 /*
2118 * Encode LOOKUP request
2119 */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121 const struct nfs4_lookup_arg *args)
2122 {
2123 struct compound_hdr hdr = {
2124 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125 };
2126
2127 encode_compound_hdr(xdr, req, &hdr);
2128 encode_sequence(xdr, &args->seq_args, &hdr);
2129 encode_putfh(xdr, args->dir_fh, &hdr);
2130 encode_lookup(xdr, args->name, &hdr);
2131 encode_getfh(xdr, &hdr);
2132 encode_getfattr(xdr, args->bitmask, &hdr);
2133 encode_nops(&hdr);
2134 }
2135
2136 /*
2137 * Encode LOOKUP_ROOT request
2138 */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140 struct xdr_stream *xdr,
2141 const struct nfs4_lookup_root_arg *args)
2142 {
2143 struct compound_hdr hdr = {
2144 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145 };
2146
2147 encode_compound_hdr(xdr, req, &hdr);
2148 encode_sequence(xdr, &args->seq_args, &hdr);
2149 encode_putrootfh(xdr, &hdr);
2150 encode_getfh(xdr, &hdr);
2151 encode_getfattr(xdr, args->bitmask, &hdr);
2152 encode_nops(&hdr);
2153 }
2154
2155 /*
2156 * Encode REMOVE request
2157 */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159 const struct nfs_removeargs *args)
2160 {
2161 struct compound_hdr hdr = {
2162 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163 };
2164
2165 encode_compound_hdr(xdr, req, &hdr);
2166 encode_sequence(xdr, &args->seq_args, &hdr);
2167 encode_putfh(xdr, args->fh, &hdr);
2168 encode_remove(xdr, &args->name, &hdr);
2169 encode_getfattr(xdr, args->bitmask, &hdr);
2170 encode_nops(&hdr);
2171 }
2172
2173 /*
2174 * Encode RENAME request
2175 */
2176 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2177 const struct nfs_renameargs *args)
2178 {
2179 struct compound_hdr hdr = {
2180 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181 };
2182
2183 encode_compound_hdr(xdr, req, &hdr);
2184 encode_sequence(xdr, &args->seq_args, &hdr);
2185 encode_putfh(xdr, args->old_dir, &hdr);
2186 encode_savefh(xdr, &hdr);
2187 encode_putfh(xdr, args->new_dir, &hdr);
2188 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2189 encode_getfattr(xdr, args->bitmask, &hdr);
2190 encode_restorefh(xdr, &hdr);
2191 encode_getfattr(xdr, args->bitmask, &hdr);
2192 encode_nops(&hdr);
2193 }
2194
2195 /*
2196 * Encode LINK request
2197 */
2198 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2199 const struct nfs4_link_arg *args)
2200 {
2201 struct compound_hdr hdr = {
2202 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203 };
2204
2205 encode_compound_hdr(xdr, req, &hdr);
2206 encode_sequence(xdr, &args->seq_args, &hdr);
2207 encode_putfh(xdr, args->fh, &hdr);
2208 encode_savefh(xdr, &hdr);
2209 encode_putfh(xdr, args->dir_fh, &hdr);
2210 encode_link(xdr, args->name, &hdr);
2211 encode_getfattr(xdr, args->bitmask, &hdr);
2212 encode_restorefh(xdr, &hdr);
2213 encode_getfattr(xdr, args->bitmask, &hdr);
2214 encode_nops(&hdr);
2215 }
2216
2217 /*
2218 * Encode CREATE request
2219 */
2220 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2221 const struct nfs4_create_arg *args)
2222 {
2223 struct compound_hdr hdr = {
2224 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225 };
2226
2227 encode_compound_hdr(xdr, req, &hdr);
2228 encode_sequence(xdr, &args->seq_args, &hdr);
2229 encode_putfh(xdr, args->dir_fh, &hdr);
2230 encode_savefh(xdr, &hdr);
2231 encode_create(xdr, args, &hdr);
2232 encode_getfh(xdr, &hdr);
2233 encode_getfattr(xdr, args->bitmask, &hdr);
2234 encode_restorefh(xdr, &hdr);
2235 encode_getfattr(xdr, args->bitmask, &hdr);
2236 encode_nops(&hdr);
2237 }
2238
2239 /*
2240 * Encode SYMLINK request
2241 */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243 const struct nfs4_create_arg *args)
2244 {
2245 nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249 * Encode GETATTR request
2250 */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252 const struct nfs4_getattr_arg *args)
2253 {
2254 struct compound_hdr hdr = {
2255 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256 };
2257
2258 encode_compound_hdr(xdr, req, &hdr);
2259 encode_sequence(xdr, &args->seq_args, &hdr);
2260 encode_putfh(xdr, args->fh, &hdr);
2261 encode_getfattr(xdr, args->bitmask, &hdr);
2262 encode_nops(&hdr);
2263 }
2264
2265 /*
2266 * Encode a CLOSE request
2267 */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269 struct nfs_closeargs *args)
2270 {
2271 struct compound_hdr hdr = {
2272 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273 };
2274
2275 encode_compound_hdr(xdr, req, &hdr);
2276 encode_sequence(xdr, &args->seq_args, &hdr);
2277 encode_putfh(xdr, args->fh, &hdr);
2278 encode_close(xdr, args, &hdr);
2279 encode_getfattr(xdr, args->bitmask, &hdr);
2280 encode_nops(&hdr);
2281 }
2282
2283 /*
2284 * Encode an OPEN request
2285 */
2286 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2287 struct nfs_openargs *args)
2288 {
2289 struct compound_hdr hdr = {
2290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291 };
2292
2293 encode_compound_hdr(xdr, req, &hdr);
2294 encode_sequence(xdr, &args->seq_args, &hdr);
2295 encode_putfh(xdr, args->fh, &hdr);
2296 encode_savefh(xdr, &hdr);
2297 encode_open(xdr, args, &hdr);
2298 encode_getfh(xdr, &hdr);
2299 encode_getfattr(xdr, args->bitmask, &hdr);
2300 encode_restorefh(xdr, &hdr);
2301 encode_getfattr(xdr, args->dir_bitmask, &hdr);
2302 encode_nops(&hdr);
2303 }
2304
2305 /*
2306 * Encode an OPEN_CONFIRM request
2307 */
2308 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2309 struct xdr_stream *xdr,
2310 struct nfs_open_confirmargs *args)
2311 {
2312 struct compound_hdr hdr = {
2313 .nops = 0,
2314 };
2315
2316 encode_compound_hdr(xdr, req, &hdr);
2317 encode_putfh(xdr, args->fh, &hdr);
2318 encode_open_confirm(xdr, args, &hdr);
2319 encode_nops(&hdr);
2320 }
2321
2322 /*
2323 * Encode an OPEN request with no attributes.
2324 */
2325 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2326 struct xdr_stream *xdr,
2327 struct nfs_openargs *args)
2328 {
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 encode_compound_hdr(xdr, req, &hdr);
2334 encode_sequence(xdr, &args->seq_args, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open(xdr, args, &hdr);
2337 encode_getfattr(xdr, args->bitmask, &hdr);
2338 encode_nops(&hdr);
2339 }
2340
2341 /*
2342 * Encode an OPEN_DOWNGRADE request
2343 */
2344 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2345 struct xdr_stream *xdr,
2346 struct nfs_closeargs *args)
2347 {
2348 struct compound_hdr hdr = {
2349 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350 };
2351
2352 encode_compound_hdr(xdr, req, &hdr);
2353 encode_sequence(xdr, &args->seq_args, &hdr);
2354 encode_putfh(xdr, args->fh, &hdr);
2355 encode_open_downgrade(xdr, args, &hdr);
2356 encode_getfattr(xdr, args->bitmask, &hdr);
2357 encode_nops(&hdr);
2358 }
2359
2360 /*
2361 * Encode a LOCK request
2362 */
2363 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2364 struct nfs_lock_args *args)
2365 {
2366 struct compound_hdr hdr = {
2367 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368 };
2369
2370 encode_compound_hdr(xdr, req, &hdr);
2371 encode_sequence(xdr, &args->seq_args, &hdr);
2372 encode_putfh(xdr, args->fh, &hdr);
2373 encode_lock(xdr, args, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode a LOCKT request
2379 */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381 struct nfs_lockt_args *args)
2382 {
2383 struct compound_hdr hdr = {
2384 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385 };
2386
2387 encode_compound_hdr(xdr, req, &hdr);
2388 encode_sequence(xdr, &args->seq_args, &hdr);
2389 encode_putfh(xdr, args->fh, &hdr);
2390 encode_lockt(xdr, args, &hdr);
2391 encode_nops(&hdr);
2392 }
2393
2394 /*
2395 * Encode a LOCKU request
2396 */
2397 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2398 struct nfs_locku_args *args)
2399 {
2400 struct compound_hdr hdr = {
2401 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402 };
2403
2404 encode_compound_hdr(xdr, req, &hdr);
2405 encode_sequence(xdr, &args->seq_args, &hdr);
2406 encode_putfh(xdr, args->fh, &hdr);
2407 encode_locku(xdr, args, &hdr);
2408 encode_nops(&hdr);
2409 }
2410
2411 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2412 struct xdr_stream *xdr,
2413 struct nfs_release_lockowner_args *args)
2414 {
2415 struct compound_hdr hdr = {
2416 .minorversion = 0,
2417 };
2418
2419 encode_compound_hdr(xdr, req, &hdr);
2420 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2421 encode_nops(&hdr);
2422 }
2423
2424 /*
2425 * Encode a READLINK request
2426 */
2427 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2428 const struct nfs4_readlink *args)
2429 {
2430 struct compound_hdr hdr = {
2431 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432 };
2433
2434 encode_compound_hdr(xdr, req, &hdr);
2435 encode_sequence(xdr, &args->seq_args, &hdr);
2436 encode_putfh(xdr, args->fh, &hdr);
2437 encode_readlink(xdr, args, req, &hdr);
2438
2439 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2440 args->pgbase, args->pglen);
2441 encode_nops(&hdr);
2442 }
2443
2444 /*
2445 * Encode a READDIR request
2446 */
2447 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2448 const struct nfs4_readdir_arg *args)
2449 {
2450 struct compound_hdr hdr = {
2451 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2452 };
2453
2454 encode_compound_hdr(xdr, req, &hdr);
2455 encode_sequence(xdr, &args->seq_args, &hdr);
2456 encode_putfh(xdr, args->fh, &hdr);
2457 encode_readdir(xdr, args, req, &hdr);
2458
2459 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2460 args->pgbase, args->count);
2461 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2462 __func__, hdr.replen << 2, args->pages,
2463 args->pgbase, args->count);
2464 encode_nops(&hdr);
2465 }
2466
2467 /*
2468 * Encode a READ request
2469 */
2470 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2471 struct nfs_readargs *args)
2472 {
2473 struct compound_hdr hdr = {
2474 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475 };
2476
2477 encode_compound_hdr(xdr, req, &hdr);
2478 encode_sequence(xdr, &args->seq_args, &hdr);
2479 encode_putfh(xdr, args->fh, &hdr);
2480 encode_read(xdr, args, &hdr);
2481
2482 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2483 args->pages, args->pgbase, args->count);
2484 req->rq_rcv_buf.flags |= XDRBUF_READ;
2485 encode_nops(&hdr);
2486 }
2487
2488 /*
2489 * Encode an SETATTR request
2490 */
2491 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2492 struct nfs_setattrargs *args)
2493 {
2494 struct compound_hdr hdr = {
2495 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496 };
2497
2498 encode_compound_hdr(xdr, req, &hdr);
2499 encode_sequence(xdr, &args->seq_args, &hdr);
2500 encode_putfh(xdr, args->fh, &hdr);
2501 encode_setattr(xdr, args, args->server, &hdr);
2502 encode_getfattr(xdr, args->bitmask, &hdr);
2503 encode_nops(&hdr);
2504 }
2505
2506 /*
2507 * Encode a GETACL request
2508 */
2509 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2510 struct nfs_getaclargs *args)
2511 {
2512 struct compound_hdr hdr = {
2513 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514 };
2515 uint32_t replen;
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2521 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2522
2523 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2524 args->acl_pages, args->acl_pgbase, args->acl_len);
2525
2526 encode_nops(&hdr);
2527 }
2528
2529 /*
2530 * Encode a WRITE request
2531 */
2532 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2533 struct nfs_writeargs *args)
2534 {
2535 struct compound_hdr hdr = {
2536 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537 };
2538
2539 encode_compound_hdr(xdr, req, &hdr);
2540 encode_sequence(xdr, &args->seq_args, &hdr);
2541 encode_putfh(xdr, args->fh, &hdr);
2542 encode_write(xdr, args, &hdr);
2543 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2544 if (args->bitmask)
2545 encode_getfattr(xdr, args->bitmask, &hdr);
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * a COMMIT request
2551 */
2552 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 struct nfs_writeargs *args)
2554 {
2555 struct compound_hdr hdr = {
2556 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557 };
2558
2559 encode_compound_hdr(xdr, req, &hdr);
2560 encode_sequence(xdr, &args->seq_args, &hdr);
2561 encode_putfh(xdr, args->fh, &hdr);
2562 encode_commit(xdr, args, &hdr);
2563 if (args->bitmask)
2564 encode_getfattr(xdr, args->bitmask, &hdr);
2565 encode_nops(&hdr);
2566 }
2567
2568 /*
2569 * FSINFO request
2570 */
2571 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2572 struct nfs4_fsinfo_arg *args)
2573 {
2574 struct compound_hdr hdr = {
2575 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576 };
2577
2578 encode_compound_hdr(xdr, req, &hdr);
2579 encode_sequence(xdr, &args->seq_args, &hdr);
2580 encode_putfh(xdr, args->fh, &hdr);
2581 encode_fsinfo(xdr, args->bitmask, &hdr);
2582 encode_nops(&hdr);
2583 }
2584
2585 /*
2586 * a PATHCONF request
2587 */
2588 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2589 const struct nfs4_pathconf_arg *args)
2590 {
2591 struct compound_hdr hdr = {
2592 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593 };
2594
2595 encode_compound_hdr(xdr, req, &hdr);
2596 encode_sequence(xdr, &args->seq_args, &hdr);
2597 encode_putfh(xdr, args->fh, &hdr);
2598 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2599 &hdr);
2600 encode_nops(&hdr);
2601 }
2602
2603 /*
2604 * a STATFS request
2605 */
2606 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2607 const struct nfs4_statfs_arg *args)
2608 {
2609 struct compound_hdr hdr = {
2610 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2611 };
2612
2613 encode_compound_hdr(xdr, req, &hdr);
2614 encode_sequence(xdr, &args->seq_args, &hdr);
2615 encode_putfh(xdr, args->fh, &hdr);
2616 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2617 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2618 encode_nops(&hdr);
2619 }
2620
2621 /*
2622 * GETATTR_BITMAP request
2623 */
2624 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2625 struct xdr_stream *xdr,
2626 struct nfs4_server_caps_arg *args)
2627 {
2628 struct compound_hdr hdr = {
2629 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630 };
2631
2632 encode_compound_hdr(xdr, req, &hdr);
2633 encode_sequence(xdr, &args->seq_args, &hdr);
2634 encode_putfh(xdr, args->fhandle, &hdr);
2635 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2636 FATTR4_WORD0_LINK_SUPPORT|
2637 FATTR4_WORD0_SYMLINK_SUPPORT|
2638 FATTR4_WORD0_ACLSUPPORT, &hdr);
2639 encode_nops(&hdr);
2640 }
2641
2642 /*
2643 * a RENEW request
2644 */
2645 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2646 struct nfs_client *clp)
2647 {
2648 struct compound_hdr hdr = {
2649 .nops = 0,
2650 };
2651
2652 encode_compound_hdr(xdr, req, &hdr);
2653 encode_renew(xdr, clp, &hdr);
2654 encode_nops(&hdr);
2655 }
2656
2657 /*
2658 * a SETCLIENTID request
2659 */
2660 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2661 struct xdr_stream *xdr,
2662 struct nfs4_setclientid *sc)
2663 {
2664 struct compound_hdr hdr = {
2665 .nops = 0,
2666 };
2667
2668 encode_compound_hdr(xdr, req, &hdr);
2669 encode_setclientid(xdr, sc, &hdr);
2670 encode_nops(&hdr);
2671 }
2672
2673 /*
2674 * a SETCLIENTID_CONFIRM request
2675 */
2676 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2677 struct xdr_stream *xdr,
2678 struct nfs4_setclientid_res *arg)
2679 {
2680 struct compound_hdr hdr = {
2681 .nops = 0,
2682 };
2683 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2684
2685 encode_compound_hdr(xdr, req, &hdr);
2686 encode_setclientid_confirm(xdr, arg, &hdr);
2687 encode_putrootfh(xdr, &hdr);
2688 encode_fsinfo(xdr, lease_bitmap, &hdr);
2689 encode_nops(&hdr);
2690 }
2691
2692 /*
2693 * DELEGRETURN request
2694 */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696 struct xdr_stream *xdr,
2697 const struct nfs4_delegreturnargs *args)
2698 {
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 encode_delegreturn(xdr, args->stateid, &hdr);
2707 encode_getfattr(xdr, args->bitmask, &hdr);
2708 encode_nops(&hdr);
2709 }
2710
2711 /*
2712 * Encode FS_LOCATIONS request
2713 */
2714 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2715 struct xdr_stream *xdr,
2716 struct nfs4_fs_locations_arg *args)
2717 {
2718 struct compound_hdr hdr = {
2719 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720 };
2721 uint32_t replen;
2722
2723 encode_compound_hdr(xdr, req, &hdr);
2724 encode_sequence(xdr, &args->seq_args, &hdr);
2725 encode_putfh(xdr, args->dir_fh, &hdr);
2726 encode_lookup(xdr, args->name, &hdr);
2727 replen = hdr.replen; /* get the attribute into args->page */
2728 encode_fs_locations(xdr, args->bitmask, &hdr);
2729
2730 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2731 0, PAGE_SIZE);
2732 encode_nops(&hdr);
2733 }
2734
2735 /*
2736 * Encode SECINFO request
2737 */
2738 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2739 struct xdr_stream *xdr,
2740 struct nfs4_secinfo_arg *args)
2741 {
2742 struct compound_hdr hdr = {
2743 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2744 };
2745
2746 encode_compound_hdr(xdr, req, &hdr);
2747 encode_sequence(xdr, &args->seq_args, &hdr);
2748 encode_putfh(xdr, args->dir_fh, &hdr);
2749 encode_secinfo(xdr, args->name, &hdr);
2750 encode_nops(&hdr);
2751 }
2752
2753 #if defined(CONFIG_NFS_V4_1)
2754 /*
2755 * EXCHANGE_ID request
2756 */
2757 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2758 struct xdr_stream *xdr,
2759 struct nfs41_exchange_id_args *args)
2760 {
2761 struct compound_hdr hdr = {
2762 .minorversion = args->client->cl_mvops->minor_version,
2763 };
2764
2765 encode_compound_hdr(xdr, req, &hdr);
2766 encode_exchange_id(xdr, args, &hdr);
2767 encode_nops(&hdr);
2768 }
2769
2770 /*
2771 * a CREATE_SESSION request
2772 */
2773 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2774 struct xdr_stream *xdr,
2775 struct nfs41_create_session_args *args)
2776 {
2777 struct compound_hdr hdr = {
2778 .minorversion = args->client->cl_mvops->minor_version,
2779 };
2780
2781 encode_compound_hdr(xdr, req, &hdr);
2782 encode_create_session(xdr, args, &hdr);
2783 encode_nops(&hdr);
2784 }
2785
2786 /*
2787 * a DESTROY_SESSION request
2788 */
2789 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2790 struct xdr_stream *xdr,
2791 struct nfs4_session *session)
2792 {
2793 struct compound_hdr hdr = {
2794 .minorversion = session->clp->cl_mvops->minor_version,
2795 };
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_destroy_session(xdr, session, &hdr);
2799 encode_nops(&hdr);
2800 }
2801
2802 /*
2803 * a SEQUENCE request
2804 */
2805 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2806 struct nfs4_sequence_args *args)
2807 {
2808 struct compound_hdr hdr = {
2809 .minorversion = nfs4_xdr_minorversion(args),
2810 };
2811
2812 encode_compound_hdr(xdr, req, &hdr);
2813 encode_sequence(xdr, args, &hdr);
2814 encode_nops(&hdr);
2815 }
2816
2817 /*
2818 * a GET_LEASE_TIME request
2819 */
2820 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2821 struct xdr_stream *xdr,
2822 struct nfs4_get_lease_time_args *args)
2823 {
2824 struct compound_hdr hdr = {
2825 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2826 };
2827 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_sequence(xdr, &args->la_seq_args, &hdr);
2831 encode_putrootfh(xdr, &hdr);
2832 encode_fsinfo(xdr, lease_bitmap, &hdr);
2833 encode_nops(&hdr);
2834 }
2835
2836 /*
2837 * a RECLAIM_COMPLETE request
2838 */
2839 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2840 struct xdr_stream *xdr,
2841 struct nfs41_reclaim_complete_args *args)
2842 {
2843 struct compound_hdr hdr = {
2844 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2845 };
2846
2847 encode_compound_hdr(xdr, req, &hdr);
2848 encode_sequence(xdr, &args->seq_args, &hdr);
2849 encode_reclaim_complete(xdr, args, &hdr);
2850 encode_nops(&hdr);
2851 }
2852
2853 /*
2854 * Encode GETDEVICELIST request
2855 */
2856 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2857 struct xdr_stream *xdr,
2858 struct nfs4_getdevicelist_args *args)
2859 {
2860 struct compound_hdr hdr = {
2861 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2862 };
2863
2864 encode_compound_hdr(xdr, req, &hdr);
2865 encode_sequence(xdr, &args->seq_args, &hdr);
2866 encode_putfh(xdr, args->fh, &hdr);
2867 encode_getdevicelist(xdr, args, &hdr);
2868 encode_nops(&hdr);
2869 }
2870
2871 /*
2872 * Encode GETDEVICEINFO request
2873 */
2874 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2875 struct xdr_stream *xdr,
2876 struct nfs4_getdeviceinfo_args *args)
2877 {
2878 struct compound_hdr hdr = {
2879 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2880 };
2881
2882 encode_compound_hdr(xdr, req, &hdr);
2883 encode_sequence(xdr, &args->seq_args, &hdr);
2884 encode_getdeviceinfo(xdr, args, &hdr);
2885
2886 /* set up reply kvec. Subtract notification bitmap max size (2)
2887 * so that notification bitmap is put in xdr_buf tail */
2888 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2889 args->pdev->pages, args->pdev->pgbase,
2890 args->pdev->pglen);
2891
2892 encode_nops(&hdr);
2893 }
2894
2895 /*
2896 * Encode LAYOUTGET request
2897 */
2898 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2899 struct xdr_stream *xdr,
2900 struct nfs4_layoutget_args *args)
2901 {
2902 struct compound_hdr hdr = {
2903 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904 };
2905
2906 encode_compound_hdr(xdr, req, &hdr);
2907 encode_sequence(xdr, &args->seq_args, &hdr);
2908 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2909 encode_layoutget(xdr, args, &hdr);
2910
2911 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2912 args->layout.pages, 0, args->layout.pglen);
2913
2914 encode_nops(&hdr);
2915 }
2916
2917 /*
2918 * Encode LAYOUTCOMMIT request
2919 */
2920 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2921 struct xdr_stream *xdr,
2922 struct nfs4_layoutcommit_args *args)
2923 {
2924 struct nfs4_layoutcommit_data *data =
2925 container_of(args, struct nfs4_layoutcommit_data, args);
2926 struct compound_hdr hdr = {
2927 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2928 };
2929
2930 encode_compound_hdr(xdr, req, &hdr);
2931 encode_sequence(xdr, &args->seq_args, &hdr);
2932 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2933 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2934 encode_getfattr(xdr, args->bitmask, &hdr);
2935 encode_nops(&hdr);
2936 }
2937
2938 /*
2939 * Encode LAYOUTRETURN request
2940 */
2941 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2942 struct xdr_stream *xdr,
2943 struct nfs4_layoutreturn_args *args)
2944 {
2945 struct compound_hdr hdr = {
2946 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2947 };
2948
2949 encode_compound_hdr(xdr, req, &hdr);
2950 encode_sequence(xdr, &args->seq_args, &hdr);
2951 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2952 encode_layoutreturn(xdr, args, &hdr);
2953 encode_nops(&hdr);
2954 }
2955
2956 /*
2957 * Encode SECINFO_NO_NAME request
2958 */
2959 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2960 struct xdr_stream *xdr,
2961 struct nfs41_secinfo_no_name_args *args)
2962 {
2963 struct compound_hdr hdr = {
2964 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2965 };
2966
2967 encode_compound_hdr(xdr, req, &hdr);
2968 encode_sequence(xdr, &args->seq_args, &hdr);
2969 encode_putrootfh(xdr, &hdr);
2970 encode_secinfo_no_name(xdr, args, &hdr);
2971 encode_nops(&hdr);
2972 return 0;
2973 }
2974
2975 /*
2976 * Encode TEST_STATEID request
2977 */
2978 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2979 struct xdr_stream *xdr,
2980 struct nfs41_test_stateid_args *args)
2981 {
2982 struct compound_hdr hdr = {
2983 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2984 };
2985
2986 encode_compound_hdr(xdr, req, &hdr);
2987 encode_sequence(xdr, &args->seq_args, &hdr);
2988 encode_test_stateid(xdr, args, &hdr);
2989 encode_nops(&hdr);
2990 }
2991
2992 /*
2993 * Encode FREE_STATEID request
2994 */
2995 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2996 struct xdr_stream *xdr,
2997 struct nfs41_free_stateid_args *args)
2998 {
2999 struct compound_hdr hdr = {
3000 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3001 };
3002
3003 encode_compound_hdr(xdr, req, &hdr);
3004 encode_sequence(xdr, &args->seq_args, &hdr);
3005 encode_free_stateid(xdr, args, &hdr);
3006 encode_nops(&hdr);
3007 }
3008 #endif /* CONFIG_NFS_V4_1 */
3009
3010 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3011 {
3012 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3013 "Remaining buffer length is %tu words.\n",
3014 func, xdr->end - xdr->p);
3015 }
3016
3017 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3018 {
3019 __be32 *p;
3020
3021 p = xdr_inline_decode(xdr, 4);
3022 if (unlikely(!p))
3023 goto out_overflow;
3024 *len = be32_to_cpup(p);
3025 p = xdr_inline_decode(xdr, *len);
3026 if (unlikely(!p))
3027 goto out_overflow;
3028 *string = (char *)p;
3029 return 0;
3030 out_overflow:
3031 print_overflow_msg(__func__, xdr);
3032 return -EIO;
3033 }
3034
3035 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3036 {
3037 __be32 *p;
3038
3039 p = xdr_inline_decode(xdr, 8);
3040 if (unlikely(!p))
3041 goto out_overflow;
3042 hdr->status = be32_to_cpup(p++);
3043 hdr->taglen = be32_to_cpup(p);
3044
3045 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3046 if (unlikely(!p))
3047 goto out_overflow;
3048 hdr->tag = (char *)p;
3049 p += XDR_QUADLEN(hdr->taglen);
3050 hdr->nops = be32_to_cpup(p);
3051 if (unlikely(hdr->nops < 1))
3052 return nfs4_stat_to_errno(hdr->status);
3053 return 0;
3054 out_overflow:
3055 print_overflow_msg(__func__, xdr);
3056 return -EIO;
3057 }
3058
3059 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3060 {
3061 __be32 *p;
3062 uint32_t opnum;
3063 int32_t nfserr;
3064
3065 p = xdr_inline_decode(xdr, 8);
3066 if (unlikely(!p))
3067 goto out_overflow;
3068 opnum = be32_to_cpup(p++);
3069 if (opnum != expected) {
3070 dprintk("nfs: Server returned operation"
3071 " %d but we issued a request for %d\n",
3072 opnum, expected);
3073 return -EIO;
3074 }
3075 nfserr = be32_to_cpup(p);
3076 if (nfserr != NFS_OK)
3077 return nfs4_stat_to_errno(nfserr);
3078 return 0;
3079 out_overflow:
3080 print_overflow_msg(__func__, xdr);
3081 return -EIO;
3082 }
3083
3084 /* Dummy routine */
3085 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3086 {
3087 __be32 *p;
3088 unsigned int strlen;
3089 char *str;
3090
3091 p = xdr_inline_decode(xdr, 12);
3092 if (likely(p))
3093 return decode_opaque_inline(xdr, &strlen, &str);
3094 print_overflow_msg(__func__, xdr);
3095 return -EIO;
3096 }
3097
3098 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3099 {
3100 uint32_t bmlen;
3101 __be32 *p;
3102
3103 p = xdr_inline_decode(xdr, 4);
3104 if (unlikely(!p))
3105 goto out_overflow;
3106 bmlen = be32_to_cpup(p);
3107
3108 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3109 p = xdr_inline_decode(xdr, (bmlen << 2));
3110 if (unlikely(!p))
3111 goto out_overflow;
3112 if (bmlen > 0) {
3113 bitmap[0] = be32_to_cpup(p++);
3114 if (bmlen > 1) {
3115 bitmap[1] = be32_to_cpup(p++);
3116 if (bmlen > 2)
3117 bitmap[2] = be32_to_cpup(p);
3118 }
3119 }
3120 return 0;
3121 out_overflow:
3122 print_overflow_msg(__func__, xdr);
3123 return -EIO;
3124 }
3125
3126 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3127 {
3128 __be32 *p;
3129
3130 p = xdr_inline_decode(xdr, 4);
3131 if (unlikely(!p))
3132 goto out_overflow;
3133 *attrlen = be32_to_cpup(p);
3134 *savep = xdr->p;
3135 return 0;
3136 out_overflow:
3137 print_overflow_msg(__func__, xdr);
3138 return -EIO;
3139 }
3140
3141 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3142 {
3143 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3144 int ret;
3145 ret = decode_attr_bitmap(xdr, bitmask);
3146 if (unlikely(ret < 0))
3147 return ret;
3148 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3149 } else
3150 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3151 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3152 bitmask[0], bitmask[1], bitmask[2]);
3153 return 0;
3154 }
3155
3156 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3157 {
3158 __be32 *p;
3159 int ret = 0;
3160
3161 *type = 0;
3162 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3163 return -EIO;
3164 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3165 p = xdr_inline_decode(xdr, 4);
3166 if (unlikely(!p))
3167 goto out_overflow;
3168 *type = be32_to_cpup(p);
3169 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3170 dprintk("%s: bad type %d\n", __func__, *type);
3171 return -EIO;
3172 }
3173 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3174 ret = NFS_ATTR_FATTR_TYPE;
3175 }
3176 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3177 return ret;
3178 out_overflow:
3179 print_overflow_msg(__func__, xdr);
3180 return -EIO;
3181 }
3182
3183 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3184 {
3185 __be32 *p;
3186 int ret = 0;
3187
3188 *change = 0;
3189 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3190 return -EIO;
3191 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3192 p = xdr_inline_decode(xdr, 8);
3193 if (unlikely(!p))
3194 goto out_overflow;
3195 xdr_decode_hyper(p, change);
3196 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3197 ret = NFS_ATTR_FATTR_CHANGE;
3198 }
3199 dprintk("%s: change attribute=%Lu\n", __func__,
3200 (unsigned long long)*change);
3201 return ret;
3202 out_overflow:
3203 print_overflow_msg(__func__, xdr);
3204 return -EIO;
3205 }
3206
3207 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3208 {
3209 __be32 *p;
3210 int ret = 0;
3211
3212 *size = 0;
3213 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3214 return -EIO;
3215 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3216 p = xdr_inline_decode(xdr, 8);
3217 if (unlikely(!p))
3218 goto out_overflow;
3219 xdr_decode_hyper(p, size);
3220 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3221 ret = NFS_ATTR_FATTR_SIZE;
3222 }
3223 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3224 return ret;
3225 out_overflow:
3226 print_overflow_msg(__func__, xdr);
3227 return -EIO;
3228 }
3229
3230 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3231 {
3232 __be32 *p;
3233
3234 *res = 0;
3235 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3236 return -EIO;
3237 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3238 p = xdr_inline_decode(xdr, 4);
3239 if (unlikely(!p))
3240 goto out_overflow;
3241 *res = be32_to_cpup(p);
3242 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3243 }
3244 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3245 return 0;
3246 out_overflow:
3247 print_overflow_msg(__func__, xdr);
3248 return -EIO;
3249 }
3250
3251 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3252 {
3253 __be32 *p;
3254
3255 *res = 0;
3256 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3257 return -EIO;
3258 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3259 p = xdr_inline_decode(xdr, 4);
3260 if (unlikely(!p))
3261 goto out_overflow;
3262 *res = be32_to_cpup(p);
3263 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3264 }
3265 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3266 return 0;
3267 out_overflow:
3268 print_overflow_msg(__func__, xdr);
3269 return -EIO;
3270 }
3271
3272 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3273 {
3274 __be32 *p;
3275 int ret = 0;
3276
3277 fsid->major = 0;
3278 fsid->minor = 0;
3279 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3280 return -EIO;
3281 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3282 p = xdr_inline_decode(xdr, 16);
3283 if (unlikely(!p))
3284 goto out_overflow;
3285 p = xdr_decode_hyper(p, &fsid->major);
3286 xdr_decode_hyper(p, &fsid->minor);
3287 bitmap[0] &= ~FATTR4_WORD0_FSID;
3288 ret = NFS_ATTR_FATTR_FSID;
3289 }
3290 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3291 (unsigned long long)fsid->major,
3292 (unsigned long long)fsid->minor);
3293 return ret;
3294 out_overflow:
3295 print_overflow_msg(__func__, xdr);
3296 return -EIO;
3297 }
3298
3299 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3300 {
3301 __be32 *p;
3302
3303 *res = 60;
3304 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3305 return -EIO;
3306 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3307 p = xdr_inline_decode(xdr, 4);
3308 if (unlikely(!p))
3309 goto out_overflow;
3310 *res = be32_to_cpup(p);
3311 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3312 }
3313 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3314 return 0;
3315 out_overflow:
3316 print_overflow_msg(__func__, xdr);
3317 return -EIO;
3318 }
3319
3320 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3321 {
3322 __be32 *p;
3323
3324 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3325 return -EIO;
3326 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3327 p = xdr_inline_decode(xdr, 4);
3328 if (unlikely(!p))
3329 goto out_overflow;
3330 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3331 *res = -be32_to_cpup(p);
3332 }
3333 return 0;
3334 out_overflow:
3335 print_overflow_msg(__func__, xdr);
3336 return -EIO;
3337 }
3338
3339 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3340 {
3341 __be32 *p;
3342 int len;
3343
3344 if (fh != NULL)
3345 memset(fh, 0, sizeof(*fh));
3346
3347 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3348 return -EIO;
3349 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3350 p = xdr_inline_decode(xdr, 4);
3351 if (unlikely(!p))
3352 goto out_overflow;
3353 len = be32_to_cpup(p);
3354 if (len > NFS4_FHSIZE)
3355 return -EIO;
3356 p = xdr_inline_decode(xdr, len);
3357 if (unlikely(!p))
3358 goto out_overflow;
3359 if (fh != NULL) {
3360 memcpy(fh->data, p, len);
3361 fh->size = len;
3362 }
3363 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3364 }
3365 return 0;
3366 out_overflow:
3367 print_overflow_msg(__func__, xdr);
3368 return -EIO;
3369 }
3370
3371 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3372 {
3373 __be32 *p;
3374
3375 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3376 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3377 return -EIO;
3378 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3379 p = xdr_inline_decode(xdr, 4);
3380 if (unlikely(!p))
3381 goto out_overflow;
3382 *res = be32_to_cpup(p);
3383 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3384 }
3385 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3386 return 0;
3387 out_overflow:
3388 print_overflow_msg(__func__, xdr);
3389 return -EIO;
3390 }
3391
3392 static int decode_attr_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[0] & (FATTR4_WORD0_FILEID - 1U)))
3399 return -EIO;
3400 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3401 p = xdr_inline_decode(xdr, 8);
3402 if (unlikely(!p))
3403 goto out_overflow;
3404 xdr_decode_hyper(p, fileid);
3405 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3406 ret = NFS_ATTR_FATTR_FILEID;
3407 }
3408 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409 return ret;
3410 out_overflow:
3411 print_overflow_msg(__func__, xdr);
3412 return -EIO;
3413 }
3414
3415 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3416 {
3417 __be32 *p;
3418 int ret = 0;
3419
3420 *fileid = 0;
3421 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3422 return -EIO;
3423 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3424 p = xdr_inline_decode(xdr, 8);
3425 if (unlikely(!p))
3426 goto out_overflow;
3427 xdr_decode_hyper(p, fileid);
3428 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3429 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3430 }
3431 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3432 return ret;
3433 out_overflow:
3434 print_overflow_msg(__func__, xdr);
3435 return -EIO;
3436 }
3437
3438 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3439 {
3440 __be32 *p;
3441 int status = 0;
3442
3443 *res = 0;
3444 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3445 return -EIO;
3446 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3447 p = xdr_inline_decode(xdr, 8);
3448 if (unlikely(!p))
3449 goto out_overflow;
3450 xdr_decode_hyper(p, res);
3451 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3452 }
3453 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3454 return status;
3455 out_overflow:
3456 print_overflow_msg(__func__, xdr);
3457 return -EIO;
3458 }
3459
3460 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3461 {
3462 __be32 *p;
3463 int status = 0;
3464
3465 *res = 0;
3466 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3467 return -EIO;
3468 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3469 p = xdr_inline_decode(xdr, 8);
3470 if (unlikely(!p))
3471 goto out_overflow;
3472 xdr_decode_hyper(p, res);
3473 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3474 }
3475 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3476 return status;
3477 out_overflow:
3478 print_overflow_msg(__func__, xdr);
3479 return -EIO;
3480 }
3481
3482 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3483 {
3484 __be32 *p;
3485 int status = 0;
3486
3487 *res = 0;
3488 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3489 return -EIO;
3490 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3491 p = xdr_inline_decode(xdr, 8);
3492 if (unlikely(!p))
3493 goto out_overflow;
3494 xdr_decode_hyper(p, res);
3495 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3496 }
3497 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3498 return status;
3499 out_overflow:
3500 print_overflow_msg(__func__, xdr);
3501 return -EIO;
3502 }
3503
3504 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3505 {
3506 u32 n;
3507 __be32 *p;
3508 int status = 0;
3509
3510 p = xdr_inline_decode(xdr, 4);
3511 if (unlikely(!p))
3512 goto out_overflow;
3513 n = be32_to_cpup(p);
3514 if (n == 0)
3515 goto root_path;
3516 dprintk("path ");
3517 path->ncomponents = 0;
3518 while (path->ncomponents < n) {
3519 struct nfs4_string *component = &path->components[path->ncomponents];
3520 status = decode_opaque_inline(xdr, &component->len, &component->data);
3521 if (unlikely(status != 0))
3522 goto out_eio;
3523 if (path->ncomponents != n)
3524 dprintk("/");
3525 dprintk("%s", component->data);
3526 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3527 path->ncomponents++;
3528 else {
3529 dprintk("cannot parse %d components in path\n", n);
3530 goto out_eio;
3531 }
3532 }
3533 out:
3534 dprintk("\n");
3535 return status;
3536 root_path:
3537 /* a root pathname is sent as a zero component4 */
3538 path->ncomponents = 1;
3539 path->components[0].len=0;
3540 path->components[0].data=NULL;
3541 dprintk("path /\n");
3542 goto out;
3543 out_eio:
3544 dprintk(" status %d", status);
3545 status = -EIO;
3546 goto out;
3547 out_overflow:
3548 print_overflow_msg(__func__, xdr);
3549 return -EIO;
3550 }
3551
3552 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3553 {
3554 int n;
3555 __be32 *p;
3556 int status = -EIO;
3557
3558 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3559 goto out;
3560 status = 0;
3561 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3562 goto out;
3563 dprintk("%s: fsroot ", __func__);
3564 status = decode_pathname(xdr, &res->fs_path);
3565 if (unlikely(status != 0))
3566 goto out;
3567 p = xdr_inline_decode(xdr, 4);
3568 if (unlikely(!p))
3569 goto out_overflow;
3570 n = be32_to_cpup(p);
3571 if (n <= 0)
3572 goto out_eio;
3573 res->nlocations = 0;
3574 while (res->nlocations < n) {
3575 u32 m;
3576 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3577
3578 p = xdr_inline_decode(xdr, 4);
3579 if (unlikely(!p))
3580 goto out_overflow;
3581 m = be32_to_cpup(p);
3582
3583 loc->nservers = 0;
3584 dprintk("%s: servers ", __func__);
3585 while (loc->nservers < m) {
3586 struct nfs4_string *server = &loc->servers[loc->nservers];
3587 status = decode_opaque_inline(xdr, &server->len, &server->data);
3588 if (unlikely(status != 0))
3589 goto out_eio;
3590 dprintk("%s ", server->data);
3591 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3592 loc->nservers++;
3593 else {
3594 unsigned int i;
3595 dprintk("%s: using first %u of %u servers "
3596 "returned for location %u\n",
3597 __func__,
3598 NFS4_FS_LOCATION_MAXSERVERS,
3599 m, res->nlocations);
3600 for (i = loc->nservers; i < m; i++) {
3601 unsigned int len;
3602 char *data;
3603 status = decode_opaque_inline(xdr, &len, &data);
3604 if (unlikely(status != 0))
3605 goto out_eio;
3606 }
3607 }
3608 }
3609 status = decode_pathname(xdr, &loc->rootpath);
3610 if (unlikely(status != 0))
3611 goto out_eio;
3612 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3613 res->nlocations++;
3614 }
3615 if (res->nlocations != 0)
3616 status = NFS_ATTR_FATTR_V4_REFERRAL;
3617 out:
3618 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3619 return status;
3620 out_overflow:
3621 print_overflow_msg(__func__, xdr);
3622 out_eio:
3623 status = -EIO;
3624 goto out;
3625 }
3626
3627 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3628 {
3629 __be32 *p;
3630 int status = 0;
3631
3632 *res = 0;
3633 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3634 return -EIO;
3635 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3636 p = xdr_inline_decode(xdr, 8);
3637 if (unlikely(!p))
3638 goto out_overflow;
3639 xdr_decode_hyper(p, res);
3640 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3641 }
3642 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3643 return status;
3644 out_overflow:
3645 print_overflow_msg(__func__, xdr);
3646 return -EIO;
3647 }
3648
3649 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3650 {
3651 __be32 *p;
3652 int status = 0;
3653
3654 *maxlink = 1;
3655 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3656 return -EIO;
3657 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3658 p = xdr_inline_decode(xdr, 4);
3659 if (unlikely(!p))
3660 goto out_overflow;
3661 *maxlink = be32_to_cpup(p);
3662 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3663 }
3664 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3665 return status;
3666 out_overflow:
3667 print_overflow_msg(__func__, xdr);
3668 return -EIO;
3669 }
3670
3671 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3672 {
3673 __be32 *p;
3674 int status = 0;
3675
3676 *maxname = 1024;
3677 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3678 return -EIO;
3679 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3680 p = xdr_inline_decode(xdr, 4);
3681 if (unlikely(!p))
3682 goto out_overflow;
3683 *maxname = be32_to_cpup(p);
3684 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3685 }
3686 dprintk("%s: maxname=%u\n", __func__, *maxname);
3687 return status;
3688 out_overflow:
3689 print_overflow_msg(__func__, xdr);
3690 return -EIO;
3691 }
3692
3693 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3694 {
3695 __be32 *p;
3696 int status = 0;
3697
3698 *res = 1024;
3699 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3700 return -EIO;
3701 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3702 uint64_t maxread;
3703 p = xdr_inline_decode(xdr, 8);
3704 if (unlikely(!p))
3705 goto out_overflow;
3706 xdr_decode_hyper(p, &maxread);
3707 if (maxread > 0x7FFFFFFF)
3708 maxread = 0x7FFFFFFF;
3709 *res = (uint32_t)maxread;
3710 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3711 }
3712 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3713 return status;
3714 out_overflow:
3715 print_overflow_msg(__func__, xdr);
3716 return -EIO;
3717 }
3718
3719 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3720 {
3721 __be32 *p;
3722 int status = 0;
3723
3724 *res = 1024;
3725 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3726 return -EIO;
3727 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3728 uint64_t maxwrite;
3729 p = xdr_inline_decode(xdr, 8);
3730 if (unlikely(!p))
3731 goto out_overflow;
3732 xdr_decode_hyper(p, &maxwrite);
3733 if (maxwrite > 0x7FFFFFFF)
3734 maxwrite = 0x7FFFFFFF;
3735 *res = (uint32_t)maxwrite;
3736 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3737 }
3738 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3739 return status;
3740 out_overflow:
3741 print_overflow_msg(__func__, xdr);
3742 return -EIO;
3743 }
3744
3745 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3746 {
3747 uint32_t tmp;
3748 __be32 *p;
3749 int ret = 0;
3750
3751 *mode = 0;
3752 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3753 return -EIO;
3754 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3755 p = xdr_inline_decode(xdr, 4);
3756 if (unlikely(!p))
3757 goto out_overflow;
3758 tmp = be32_to_cpup(p);
3759 *mode = tmp & ~S_IFMT;
3760 bitmap[1] &= ~FATTR4_WORD1_MODE;
3761 ret = NFS_ATTR_FATTR_MODE;
3762 }
3763 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3764 return ret;
3765 out_overflow:
3766 print_overflow_msg(__func__, xdr);
3767 return -EIO;
3768 }
3769
3770 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3771 {
3772 __be32 *p;
3773 int ret = 0;
3774
3775 *nlink = 1;
3776 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3777 return -EIO;
3778 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3779 p = xdr_inline_decode(xdr, 4);
3780 if (unlikely(!p))
3781 goto out_overflow;
3782 *nlink = be32_to_cpup(p);
3783 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3784 ret = NFS_ATTR_FATTR_NLINK;
3785 }
3786 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3787 return ret;
3788 out_overflow:
3789 print_overflow_msg(__func__, xdr);
3790 return -EIO;
3791 }
3792
3793 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3794 const struct nfs_server *server, uint32_t *uid,
3795 struct nfs4_string *owner_name)
3796 {
3797 uint32_t len;
3798 __be32 *p;
3799 int ret = 0;
3800
3801 *uid = -2;
3802 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3803 return -EIO;
3804 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3805 p = xdr_inline_decode(xdr, 4);
3806 if (unlikely(!p))
3807 goto out_overflow;
3808 len = be32_to_cpup(p);
3809 p = xdr_inline_decode(xdr, len);
3810 if (unlikely(!p))
3811 goto out_overflow;
3812 if (owner_name != NULL) {
3813 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3814 if (owner_name->data != NULL) {
3815 owner_name->len = len;
3816 ret = NFS_ATTR_FATTR_OWNER_NAME;
3817 }
3818 } else if (len < XDR_MAX_NETOBJ) {
3819 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3820 ret = NFS_ATTR_FATTR_OWNER;
3821 else
3822 dprintk("%s: nfs_map_name_to_uid failed!\n",
3823 __func__);
3824 } else
3825 dprintk("%s: name too long (%u)!\n",
3826 __func__, len);
3827 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3828 }
3829 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3830 return ret;
3831 out_overflow:
3832 print_overflow_msg(__func__, xdr);
3833 return -EIO;
3834 }
3835
3836 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3837 const struct nfs_server *server, uint32_t *gid,
3838 struct nfs4_string *group_name)
3839 {
3840 uint32_t len;
3841 __be32 *p;
3842 int ret = 0;
3843
3844 *gid = -2;
3845 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3846 return -EIO;
3847 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3848 p = xdr_inline_decode(xdr, 4);
3849 if (unlikely(!p))
3850 goto out_overflow;
3851 len = be32_to_cpup(p);
3852 p = xdr_inline_decode(xdr, len);
3853 if (unlikely(!p))
3854 goto out_overflow;
3855 if (group_name != NULL) {
3856 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3857 if (group_name->data != NULL) {
3858 group_name->len = len;
3859 ret = NFS_ATTR_FATTR_GROUP_NAME;
3860 }
3861 } else if (len < XDR_MAX_NETOBJ) {
3862 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3863 ret = NFS_ATTR_FATTR_GROUP;
3864 else
3865 dprintk("%s: nfs_map_group_to_gid failed!\n",
3866 __func__);
3867 } else
3868 dprintk("%s: name too long (%u)!\n",
3869 __func__, len);
3870 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3871 }
3872 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3873 return ret;
3874 out_overflow:
3875 print_overflow_msg(__func__, xdr);
3876 return -EIO;
3877 }
3878
3879 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3880 {
3881 uint32_t major = 0, minor = 0;
3882 __be32 *p;
3883 int ret = 0;
3884
3885 *rdev = MKDEV(0,0);
3886 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3887 return -EIO;
3888 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3889 dev_t tmp;
3890
3891 p = xdr_inline_decode(xdr, 8);
3892 if (unlikely(!p))
3893 goto out_overflow;
3894 major = be32_to_cpup(p++);
3895 minor = be32_to_cpup(p);
3896 tmp = MKDEV(major, minor);
3897 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3898 *rdev = tmp;
3899 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3900 ret = NFS_ATTR_FATTR_RDEV;
3901 }
3902 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3903 return ret;
3904 out_overflow:
3905 print_overflow_msg(__func__, xdr);
3906 return -EIO;
3907 }
3908
3909 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3910 {
3911 __be32 *p;
3912 int status = 0;
3913
3914 *res = 0;
3915 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3916 return -EIO;
3917 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3918 p = xdr_inline_decode(xdr, 8);
3919 if (unlikely(!p))
3920 goto out_overflow;
3921 xdr_decode_hyper(p, res);
3922 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3923 }
3924 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3925 return status;
3926 out_overflow:
3927 print_overflow_msg(__func__, xdr);
3928 return -EIO;
3929 }
3930
3931 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3932 {
3933 __be32 *p;
3934 int status = 0;
3935
3936 *res = 0;
3937 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3938 return -EIO;
3939 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3940 p = xdr_inline_decode(xdr, 8);
3941 if (unlikely(!p))
3942 goto out_overflow;
3943 xdr_decode_hyper(p, res);
3944 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3945 }
3946 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3947 return status;
3948 out_overflow:
3949 print_overflow_msg(__func__, xdr);
3950 return -EIO;
3951 }
3952
3953 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3954 {
3955 __be32 *p;
3956 int status = 0;
3957
3958 *res = 0;
3959 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3960 return -EIO;
3961 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3962 p = xdr_inline_decode(xdr, 8);
3963 if (unlikely(!p))
3964 goto out_overflow;
3965 xdr_decode_hyper(p, res);
3966 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3967 }
3968 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3969 return status;
3970 out_overflow:
3971 print_overflow_msg(__func__, xdr);
3972 return -EIO;
3973 }
3974
3975 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3976 {
3977 __be32 *p;
3978 int ret = 0;
3979
3980 *used = 0;
3981 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3982 return -EIO;
3983 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3984 p = xdr_inline_decode(xdr, 8);
3985 if (unlikely(!p))
3986 goto out_overflow;
3987 xdr_decode_hyper(p, used);
3988 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3989 ret = NFS_ATTR_FATTR_SPACE_USED;
3990 }
3991 dprintk("%s: space used=%Lu\n", __func__,
3992 (unsigned long long)*used);
3993 return ret;
3994 out_overflow:
3995 print_overflow_msg(__func__, xdr);
3996 return -EIO;
3997 }
3998
3999 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4000 {
4001 __be32 *p;
4002 uint64_t sec;
4003 uint32_t nsec;
4004
4005 p = xdr_inline_decode(xdr, 12);
4006 if (unlikely(!p))
4007 goto out_overflow;
4008 p = xdr_decode_hyper(p, &sec);
4009 nsec = be32_to_cpup(p);
4010 time->tv_sec = (time_t)sec;
4011 time->tv_nsec = (long)nsec;
4012 return 0;
4013 out_overflow:
4014 print_overflow_msg(__func__, xdr);
4015 return -EIO;
4016 }
4017
4018 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4019 {
4020 int status = 0;
4021
4022 time->tv_sec = 0;
4023 time->tv_nsec = 0;
4024 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4025 return -EIO;
4026 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4027 status = decode_attr_time(xdr, time);
4028 if (status == 0)
4029 status = NFS_ATTR_FATTR_ATIME;
4030 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4031 }
4032 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4033 return status;
4034 }
4035
4036 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, 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_METADATA - 1U)))
4043 return -EIO;
4044 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4045 status = decode_attr_time(xdr, time);
4046 if (status == 0)
4047 status = NFS_ATTR_FATTR_CTIME;
4048 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4049 }
4050 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4051 return status;
4052 }
4053
4054 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4055 struct timespec *time)
4056 {
4057 int status = 0;
4058
4059 time->tv_sec = 0;
4060 time->tv_nsec = 0;
4061 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4062 return -EIO;
4063 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4064 status = decode_attr_time(xdr, time);
4065 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4066 }
4067 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4068 (long)time->tv_nsec);
4069 return status;
4070 }
4071
4072 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4073 {
4074 int status = 0;
4075
4076 time->tv_sec = 0;
4077 time->tv_nsec = 0;
4078 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4079 return -EIO;
4080 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4081 status = decode_attr_time(xdr, time);
4082 if (status == 0)
4083 status = NFS_ATTR_FATTR_MTIME;
4084 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4085 }
4086 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4087 return status;
4088 }
4089
4090 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4091 {
4092 unsigned int attrwords = XDR_QUADLEN(attrlen);
4093 unsigned int nwords = xdr->p - savep;
4094
4095 if (unlikely(attrwords != nwords)) {
4096 dprintk("%s: server returned incorrect attribute length: "
4097 "%u %c %u\n",
4098 __func__,
4099 attrwords << 2,
4100 (attrwords < nwords) ? '<' : '>',
4101 nwords << 2);
4102 return -EIO;
4103 }
4104 return 0;
4105 }
4106
4107 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4108 {
4109 __be32 *p;
4110
4111 p = xdr_inline_decode(xdr, 20);
4112 if (unlikely(!p))
4113 goto out_overflow;
4114 cinfo->atomic = be32_to_cpup(p++);
4115 p = xdr_decode_hyper(p, &cinfo->before);
4116 xdr_decode_hyper(p, &cinfo->after);
4117 return 0;
4118 out_overflow:
4119 print_overflow_msg(__func__, xdr);
4120 return -EIO;
4121 }
4122
4123 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4124 {
4125 __be32 *p;
4126 uint32_t supp, acc;
4127 int status;
4128
4129 status = decode_op_hdr(xdr, OP_ACCESS);
4130 if (status)
4131 return status;
4132 p = xdr_inline_decode(xdr, 8);
4133 if (unlikely(!p))
4134 goto out_overflow;
4135 supp = be32_to_cpup(p++);
4136 acc = be32_to_cpup(p);
4137 access->supported = supp;
4138 access->access = acc;
4139 return 0;
4140 out_overflow:
4141 print_overflow_msg(__func__, xdr);
4142 return -EIO;
4143 }
4144
4145 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4146 {
4147 __be32 *p;
4148
4149 p = xdr_inline_decode(xdr, len);
4150 if (likely(p)) {
4151 memcpy(buf, p, len);
4152 return 0;
4153 }
4154 print_overflow_msg(__func__, xdr);
4155 return -EIO;
4156 }
4157
4158 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4159 {
4160 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4161 }
4162
4163 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4164 {
4165 int status;
4166
4167 status = decode_op_hdr(xdr, OP_CLOSE);
4168 if (status != -EIO)
4169 nfs_increment_open_seqid(status, res->seqid);
4170 if (!status)
4171 status = decode_stateid(xdr, &res->stateid);
4172 return status;
4173 }
4174
4175 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4176 {
4177 return decode_opaque_fixed(xdr, verifier, 8);
4178 }
4179
4180 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4181 {
4182 int status;
4183
4184 status = decode_op_hdr(xdr, OP_COMMIT);
4185 if (!status)
4186 status = decode_verifier(xdr, res->verf->verifier);
4187 return status;
4188 }
4189
4190 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4191 {
4192 __be32 *p;
4193 uint32_t bmlen;
4194 int status;
4195
4196 status = decode_op_hdr(xdr, OP_CREATE);
4197 if (status)
4198 return status;
4199 if ((status = decode_change_info(xdr, cinfo)))
4200 return status;
4201 p = xdr_inline_decode(xdr, 4);
4202 if (unlikely(!p))
4203 goto out_overflow;
4204 bmlen = be32_to_cpup(p);
4205 p = xdr_inline_decode(xdr, bmlen << 2);
4206 if (likely(p))
4207 return 0;
4208 out_overflow:
4209 print_overflow_msg(__func__, xdr);
4210 return -EIO;
4211 }
4212
4213 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4214 {
4215 __be32 *savep;
4216 uint32_t attrlen, bitmap[3] = {0};
4217 int status;
4218
4219 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4220 goto xdr_error;
4221 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4222 goto xdr_error;
4223 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4224 goto xdr_error;
4225 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4226 goto xdr_error;
4227 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4228 goto xdr_error;
4229 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4230 goto xdr_error;
4231 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4232 goto xdr_error;
4233 status = verify_attr_len(xdr, savep, attrlen);
4234 xdr_error:
4235 dprintk("%s: xdr returned %d!\n", __func__, -status);
4236 return status;
4237 }
4238
4239 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4240 {
4241 __be32 *savep;
4242 uint32_t attrlen, bitmap[3] = {0};
4243 int status;
4244
4245 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4246 goto xdr_error;
4247 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4248 goto xdr_error;
4249 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4250 goto xdr_error;
4251
4252 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4253 goto xdr_error;
4254 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4255 goto xdr_error;
4256 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4257 goto xdr_error;
4258 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4259 goto xdr_error;
4260 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4261 goto xdr_error;
4262 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4263 goto xdr_error;
4264
4265 status = verify_attr_len(xdr, savep, attrlen);
4266 xdr_error:
4267 dprintk("%s: xdr returned %d!\n", __func__, -status);
4268 return status;
4269 }
4270
4271 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4272 {
4273 __be32 *savep;
4274 uint32_t attrlen, bitmap[3] = {0};
4275 int status;
4276
4277 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4278 goto xdr_error;
4279 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4280 goto xdr_error;
4281 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4282 goto xdr_error;
4283
4284 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4285 goto xdr_error;
4286 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4287 goto xdr_error;
4288
4289 status = verify_attr_len(xdr, savep, attrlen);
4290 xdr_error:
4291 dprintk("%s: xdr returned %d!\n", __func__, -status);
4292 return status;
4293 }
4294
4295 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4296 struct nfs_fattr *fattr, struct nfs_fh *fh,
4297 const struct nfs_server *server)
4298 {
4299 int status;
4300 umode_t fmode = 0;
4301 uint32_t type;
4302 int32_t err;
4303
4304 status = decode_attr_type(xdr, bitmap, &type);
4305 if (status < 0)
4306 goto xdr_error;
4307 fattr->mode = 0;
4308 if (status != 0) {
4309 fattr->mode |= nfs_type2fmt[type];
4310 fattr->valid |= status;
4311 }
4312
4313 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4314 if (status < 0)
4315 goto xdr_error;
4316 fattr->valid |= status;
4317
4318 status = decode_attr_size(xdr, bitmap, &fattr->size);
4319 if (status < 0)
4320 goto xdr_error;
4321 fattr->valid |= status;
4322
4323 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4324 if (status < 0)
4325 goto xdr_error;
4326 fattr->valid |= status;
4327
4328 err = 0;
4329 status = decode_attr_error(xdr, bitmap, &err);
4330 if (status < 0)
4331 goto xdr_error;
4332 if (err == -NFS4ERR_WRONGSEC)
4333 nfs_fixup_secinfo_attributes(fattr, fh);
4334
4335 status = decode_attr_filehandle(xdr, bitmap, fh);
4336 if (status < 0)
4337 goto xdr_error;
4338
4339 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4340 if (status < 0)
4341 goto xdr_error;
4342 fattr->valid |= status;
4343
4344 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4345 struct nfs4_fs_locations,
4346 fattr));
4347 if (status < 0)
4348 goto xdr_error;
4349 fattr->valid |= status;
4350
4351 status = decode_attr_mode(xdr, bitmap, &fmode);
4352 if (status < 0)
4353 goto xdr_error;
4354 if (status != 0) {
4355 fattr->mode |= fmode;
4356 fattr->valid |= status;
4357 }
4358
4359 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4360 if (status < 0)
4361 goto xdr_error;
4362 fattr->valid |= status;
4363
4364 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4365 if (status < 0)
4366 goto xdr_error;
4367 fattr->valid |= status;
4368
4369 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4370 if (status < 0)
4371 goto xdr_error;
4372 fattr->valid |= status;
4373
4374 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4375 if (status < 0)
4376 goto xdr_error;
4377 fattr->valid |= status;
4378
4379 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4380 if (status < 0)
4381 goto xdr_error;
4382 fattr->valid |= status;
4383
4384 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4385 if (status < 0)
4386 goto xdr_error;
4387 fattr->valid |= status;
4388
4389 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4390 if (status < 0)
4391 goto xdr_error;
4392 fattr->valid |= status;
4393
4394 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4395 if (status < 0)
4396 goto xdr_error;
4397 fattr->valid |= status;
4398
4399 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4400 if (status < 0)
4401 goto xdr_error;
4402 fattr->valid |= status;
4403
4404 xdr_error:
4405 dprintk("%s: xdr returned %d\n", __func__, -status);
4406 return status;
4407 }
4408
4409 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4410 struct nfs_fh *fh, const struct nfs_server *server)
4411 {
4412 __be32 *savep;
4413 uint32_t attrlen,
4414 bitmap[3] = {0};
4415 int status;
4416
4417 status = decode_op_hdr(xdr, OP_GETATTR);
4418 if (status < 0)
4419 goto xdr_error;
4420
4421 status = decode_attr_bitmap(xdr, bitmap);
4422 if (status < 0)
4423 goto xdr_error;
4424
4425 status = decode_attr_length(xdr, &attrlen, &savep);
4426 if (status < 0)
4427 goto xdr_error;
4428
4429 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server);
4430 if (status < 0)
4431 goto xdr_error;
4432
4433 status = verify_attr_len(xdr, savep, attrlen);
4434 xdr_error:
4435 dprintk("%s: xdr returned %d\n", __func__, -status);
4436 return status;
4437 }
4438
4439 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4440 const struct nfs_server *server)
4441 {
4442 return decode_getfattr_generic(xdr, fattr, NULL, server);
4443 }
4444
4445 /*
4446 * Decode potentially multiple layout types. Currently we only support
4447 * one layout driver per file system.
4448 */
4449 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4450 uint32_t *layouttype)
4451 {
4452 uint32_t *p;
4453 int num;
4454
4455 p = xdr_inline_decode(xdr, 4);
4456 if (unlikely(!p))
4457 goto out_overflow;
4458 num = be32_to_cpup(p);
4459
4460 /* pNFS is not supported by the underlying file system */
4461 if (num == 0) {
4462 *layouttype = 0;
4463 return 0;
4464 }
4465 if (num > 1)
4466 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4467 "per filesystem not supported\n", __func__);
4468
4469 /* Decode and set first layout type, move xdr->p past unused types */
4470 p = xdr_inline_decode(xdr, num * 4);
4471 if (unlikely(!p))
4472 goto out_overflow;
4473 *layouttype = be32_to_cpup(p);
4474 return 0;
4475 out_overflow:
4476 print_overflow_msg(__func__, xdr);
4477 return -EIO;
4478 }
4479
4480 /*
4481 * The type of file system exported.
4482 * Note we must ensure that layouttype is set in any non-error case.
4483 */
4484 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4485 uint32_t *layouttype)
4486 {
4487 int status = 0;
4488
4489 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4490 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4491 return -EIO;
4492 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4493 status = decode_first_pnfs_layout_type(xdr, layouttype);
4494 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4495 } else
4496 *layouttype = 0;
4497 return status;
4498 }
4499
4500 /*
4501 * The prefered block size for layout directed io
4502 */
4503 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4504 uint32_t *res)
4505 {
4506 __be32 *p;
4507
4508 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4509 *res = 0;
4510 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4511 p = xdr_inline_decode(xdr, 4);
4512 if (unlikely(!p)) {
4513 print_overflow_msg(__func__, xdr);
4514 return -EIO;
4515 }
4516 *res = be32_to_cpup(p);
4517 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4518 }
4519 return 0;
4520 }
4521
4522 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4523 {
4524 __be32 *savep;
4525 uint32_t attrlen, bitmap[3];
4526 int status;
4527
4528 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4529 goto xdr_error;
4530 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4531 goto xdr_error;
4532 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4533 goto xdr_error;
4534
4535 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4536
4537 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4538 goto xdr_error;
4539 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4540 goto xdr_error;
4541 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4542 goto xdr_error;
4543 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4544 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4545 goto xdr_error;
4546 fsinfo->wtpref = fsinfo->wtmax;
4547 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4548 if (status != 0)
4549 goto xdr_error;
4550 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4551 if (status != 0)
4552 goto xdr_error;
4553 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4554 if (status)
4555 goto xdr_error;
4556
4557 status = verify_attr_len(xdr, savep, attrlen);
4558 xdr_error:
4559 dprintk("%s: xdr returned %d!\n", __func__, -status);
4560 return status;
4561 }
4562
4563 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4564 {
4565 __be32 *p;
4566 uint32_t len;
4567 int status;
4568
4569 /* Zero handle first to allow comparisons */
4570 memset(fh, 0, sizeof(*fh));
4571
4572 status = decode_op_hdr(xdr, OP_GETFH);
4573 if (status)
4574 return status;
4575
4576 p = xdr_inline_decode(xdr, 4);
4577 if (unlikely(!p))
4578 goto out_overflow;
4579 len = be32_to_cpup(p);
4580 if (len > NFS4_FHSIZE)
4581 return -EIO;
4582 fh->size = len;
4583 p = xdr_inline_decode(xdr, len);
4584 if (unlikely(!p))
4585 goto out_overflow;
4586 memcpy(fh->data, p, len);
4587 return 0;
4588 out_overflow:
4589 print_overflow_msg(__func__, xdr);
4590 return -EIO;
4591 }
4592
4593 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4594 {
4595 int status;
4596
4597 status = decode_op_hdr(xdr, OP_LINK);
4598 if (status)
4599 return status;
4600 return decode_change_info(xdr, cinfo);
4601 }
4602
4603 /*
4604 * We create the owner, so we know a proper owner.id length is 4.
4605 */
4606 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4607 {
4608 uint64_t offset, length, clientid;
4609 __be32 *p;
4610 uint32_t namelen, type;
4611
4612 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4613 if (unlikely(!p))
4614 goto out_overflow;
4615 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4616 p = xdr_decode_hyper(p, &length);
4617 type = be32_to_cpup(p++); /* 4 byte read */
4618 if (fl != NULL) { /* manipulate file lock */
4619 fl->fl_start = (loff_t)offset;
4620 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4621 if (length == ~(uint64_t)0)
4622 fl->fl_end = OFFSET_MAX;
4623 fl->fl_type = F_WRLCK;
4624 if (type & 1)
4625 fl->fl_type = F_RDLCK;
4626 fl->fl_pid = 0;
4627 }
4628 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4629 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4630 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4631 if (likely(p))
4632 return -NFS4ERR_DENIED;
4633 out_overflow:
4634 print_overflow_msg(__func__, xdr);
4635 return -EIO;
4636 }
4637
4638 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4639 {
4640 int status;
4641
4642 status = decode_op_hdr(xdr, OP_LOCK);
4643 if (status == -EIO)
4644 goto out;
4645 if (status == 0) {
4646 status = decode_stateid(xdr, &res->stateid);
4647 if (unlikely(status))
4648 goto out;
4649 } else if (status == -NFS4ERR_DENIED)
4650 status = decode_lock_denied(xdr, NULL);
4651 if (res->open_seqid != NULL)
4652 nfs_increment_open_seqid(status, res->open_seqid);
4653 nfs_increment_lock_seqid(status, res->lock_seqid);
4654 out:
4655 return status;
4656 }
4657
4658 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4659 {
4660 int status;
4661 status = decode_op_hdr(xdr, OP_LOCKT);
4662 if (status == -NFS4ERR_DENIED)
4663 return decode_lock_denied(xdr, res->denied);
4664 return status;
4665 }
4666
4667 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4668 {
4669 int status;
4670
4671 status = decode_op_hdr(xdr, OP_LOCKU);
4672 if (status != -EIO)
4673 nfs_increment_lock_seqid(status, res->seqid);
4674 if (status == 0)
4675 status = decode_stateid(xdr, &res->stateid);
4676 return status;
4677 }
4678
4679 static int decode_release_lockowner(struct xdr_stream *xdr)
4680 {
4681 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4682 }
4683
4684 static int decode_lookup(struct xdr_stream *xdr)
4685 {
4686 return decode_op_hdr(xdr, OP_LOOKUP);
4687 }
4688
4689 /* This is too sick! */
4690 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4691 {
4692 __be32 *p;
4693 uint32_t limit_type, nblocks, blocksize;
4694
4695 p = xdr_inline_decode(xdr, 12);
4696 if (unlikely(!p))
4697 goto out_overflow;
4698 limit_type = be32_to_cpup(p++);
4699 switch (limit_type) {
4700 case 1:
4701 xdr_decode_hyper(p, maxsize);
4702 break;
4703 case 2:
4704 nblocks = be32_to_cpup(p++);
4705 blocksize = be32_to_cpup(p);
4706 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4707 }
4708 return 0;
4709 out_overflow:
4710 print_overflow_msg(__func__, xdr);
4711 return -EIO;
4712 }
4713
4714 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4715 {
4716 __be32 *p;
4717 uint32_t delegation_type;
4718 int status;
4719
4720 p = xdr_inline_decode(xdr, 4);
4721 if (unlikely(!p))
4722 goto out_overflow;
4723 delegation_type = be32_to_cpup(p);
4724 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4725 res->delegation_type = 0;
4726 return 0;
4727 }
4728 status = decode_stateid(xdr, &res->delegation);
4729 if (unlikely(status))
4730 return status;
4731 p = xdr_inline_decode(xdr, 4);
4732 if (unlikely(!p))
4733 goto out_overflow;
4734 res->do_recall = be32_to_cpup(p);
4735
4736 switch (delegation_type) {
4737 case NFS4_OPEN_DELEGATE_READ:
4738 res->delegation_type = FMODE_READ;
4739 break;
4740 case NFS4_OPEN_DELEGATE_WRITE:
4741 res->delegation_type = FMODE_WRITE|FMODE_READ;
4742 if (decode_space_limit(xdr, &res->maxsize) < 0)
4743 return -EIO;
4744 }
4745 return decode_ace(xdr, NULL, res->server->nfs_client);
4746 out_overflow:
4747 print_overflow_msg(__func__, xdr);
4748 return -EIO;
4749 }
4750
4751 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4752 {
4753 __be32 *p;
4754 uint32_t savewords, bmlen, i;
4755 int status;
4756
4757 status = decode_op_hdr(xdr, OP_OPEN);
4758 if (status != -EIO)
4759 nfs_increment_open_seqid(status, res->seqid);
4760 if (!status)
4761 status = decode_stateid(xdr, &res->stateid);
4762 if (unlikely(status))
4763 return status;
4764
4765 decode_change_info(xdr, &res->cinfo);
4766
4767 p = xdr_inline_decode(xdr, 8);
4768 if (unlikely(!p))
4769 goto out_overflow;
4770 res->rflags = be32_to_cpup(p++);
4771 bmlen = be32_to_cpup(p);
4772 if (bmlen > 10)
4773 goto xdr_error;
4774
4775 p = xdr_inline_decode(xdr, bmlen << 2);
4776 if (unlikely(!p))
4777 goto out_overflow;
4778 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4779 for (i = 0; i < savewords; ++i)
4780 res->attrset[i] = be32_to_cpup(p++);
4781 for (; i < NFS4_BITMAP_SIZE; i++)
4782 res->attrset[i] = 0;
4783
4784 return decode_delegation(xdr, res);
4785 xdr_error:
4786 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4787 return -EIO;
4788 out_overflow:
4789 print_overflow_msg(__func__, xdr);
4790 return -EIO;
4791 }
4792
4793 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4794 {
4795 int status;
4796
4797 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4798 if (status != -EIO)
4799 nfs_increment_open_seqid(status, res->seqid);
4800 if (!status)
4801 status = decode_stateid(xdr, &res->stateid);
4802 return status;
4803 }
4804
4805 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4806 {
4807 int status;
4808
4809 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4810 if (status != -EIO)
4811 nfs_increment_open_seqid(status, res->seqid);
4812 if (!status)
4813 status = decode_stateid(xdr, &res->stateid);
4814 return status;
4815 }
4816
4817 static int decode_putfh(struct xdr_stream *xdr)
4818 {
4819 return decode_op_hdr(xdr, OP_PUTFH);
4820 }
4821
4822 static int decode_putrootfh(struct xdr_stream *xdr)
4823 {
4824 return decode_op_hdr(xdr, OP_PUTROOTFH);
4825 }
4826
4827 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4828 {
4829 struct kvec *iov = req->rq_rcv_buf.head;
4830 __be32 *p;
4831 uint32_t count, eof, recvd, hdrlen;
4832 int status;
4833
4834 status = decode_op_hdr(xdr, OP_READ);
4835 if (status)
4836 return status;
4837 p = xdr_inline_decode(xdr, 8);
4838 if (unlikely(!p))
4839 goto out_overflow;
4840 eof = be32_to_cpup(p++);
4841 count = be32_to_cpup(p);
4842 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4843 recvd = req->rq_rcv_buf.len - hdrlen;
4844 if (count > recvd) {
4845 dprintk("NFS: server cheating in read reply: "
4846 "count %u > recvd %u\n", count, recvd);
4847 count = recvd;
4848 eof = 0;
4849 }
4850 xdr_read_pages(xdr, count);
4851 res->eof = eof;
4852 res->count = count;
4853 return 0;
4854 out_overflow:
4855 print_overflow_msg(__func__, xdr);
4856 return -EIO;
4857 }
4858
4859 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4860 {
4861 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4862 struct kvec *iov = rcvbuf->head;
4863 size_t hdrlen;
4864 u32 recvd, pglen = rcvbuf->page_len;
4865 int status;
4866
4867 status = decode_op_hdr(xdr, OP_READDIR);
4868 if (!status)
4869 status = decode_verifier(xdr, readdir->verifier.data);
4870 if (unlikely(status))
4871 return status;
4872 dprintk("%s: verifier = %08x:%08x\n",
4873 __func__,
4874 ((u32 *)readdir->verifier.data)[0],
4875 ((u32 *)readdir->verifier.data)[1]);
4876
4877
4878 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4879 recvd = rcvbuf->len - hdrlen;
4880 if (pglen > recvd)
4881 pglen = recvd;
4882 xdr_read_pages(xdr, pglen);
4883
4884
4885 return pglen;
4886 }
4887
4888 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4889 {
4890 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4891 struct kvec *iov = rcvbuf->head;
4892 size_t hdrlen;
4893 u32 len, recvd;
4894 __be32 *p;
4895 int status;
4896
4897 status = decode_op_hdr(xdr, OP_READLINK);
4898 if (status)
4899 return status;
4900
4901 /* Convert length of symlink */
4902 p = xdr_inline_decode(xdr, 4);
4903 if (unlikely(!p))
4904 goto out_overflow;
4905 len = be32_to_cpup(p);
4906 if (len >= rcvbuf->page_len || len <= 0) {
4907 dprintk("nfs: server returned giant symlink!\n");
4908 return -ENAMETOOLONG;
4909 }
4910 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4911 recvd = req->rq_rcv_buf.len - hdrlen;
4912 if (recvd < len) {
4913 dprintk("NFS: server cheating in readlink reply: "
4914 "count %u > recvd %u\n", len, recvd);
4915 return -EIO;
4916 }
4917 xdr_read_pages(xdr, len);
4918 /*
4919 * The XDR encode routine has set things up so that
4920 * the link text will be copied directly into the
4921 * buffer. We just have to do overflow-checking,
4922 * and and null-terminate the text (the VFS expects
4923 * null-termination).
4924 */
4925 xdr_terminate_string(rcvbuf, len);
4926 return 0;
4927 out_overflow:
4928 print_overflow_msg(__func__, xdr);
4929 return -EIO;
4930 }
4931
4932 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4933 {
4934 int status;
4935
4936 status = decode_op_hdr(xdr, OP_REMOVE);
4937 if (status)
4938 goto out;
4939 status = decode_change_info(xdr, cinfo);
4940 out:
4941 return status;
4942 }
4943
4944 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4945 struct nfs4_change_info *new_cinfo)
4946 {
4947 int status;
4948
4949 status = decode_op_hdr(xdr, OP_RENAME);
4950 if (status)
4951 goto out;
4952 if ((status = decode_change_info(xdr, old_cinfo)))
4953 goto out;
4954 status = decode_change_info(xdr, new_cinfo);
4955 out:
4956 return status;
4957 }
4958
4959 static int decode_renew(struct xdr_stream *xdr)
4960 {
4961 return decode_op_hdr(xdr, OP_RENEW);
4962 }
4963
4964 static int
4965 decode_restorefh(struct xdr_stream *xdr)
4966 {
4967 return decode_op_hdr(xdr, OP_RESTOREFH);
4968 }
4969
4970 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4971 struct nfs_getaclres *res)
4972 {
4973 __be32 *savep, *bm_p;
4974 uint32_t attrlen,
4975 bitmap[3] = {0};
4976 struct kvec *iov = req->rq_rcv_buf.head;
4977 int status;
4978 size_t page_len = xdr->buf->page_len;
4979
4980 res->acl_len = 0;
4981 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4982 goto out;
4983
4984 bm_p = xdr->p;
4985 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4986 res->acl_data_offset <<= 2;
4987 /* Check if the acl data starts beyond the allocated buffer */
4988 if (res->acl_data_offset > page_len)
4989 return -ERANGE;
4990
4991 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4992 goto out;
4993 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4994 goto out;
4995
4996 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4997 return -EIO;
4998 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4999 size_t hdrlen;
5000
5001 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5002 * are stored with the acl data to handle the problem of
5003 * variable length bitmaps.*/
5004 xdr->p = bm_p;
5005
5006 /* We ignore &savep and don't do consistency checks on
5007 * the attr length. Let userspace figure it out.... */
5008 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
5009 attrlen += res->acl_data_offset;
5010 if (attrlen > page_len) {
5011 if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5012 /* getxattr interface called with a NULL buf */
5013 res->acl_len = attrlen;
5014 goto out;
5015 }
5016 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5017 attrlen, page_len);
5018 return -EINVAL;
5019 }
5020 xdr_read_pages(xdr, attrlen);
5021 res->acl_len = attrlen;
5022 } else
5023 status = -EOPNOTSUPP;
5024
5025 out:
5026 return status;
5027 }
5028
5029 static int
5030 decode_savefh(struct xdr_stream *xdr)
5031 {
5032 return decode_op_hdr(xdr, OP_SAVEFH);
5033 }
5034
5035 static int decode_setattr(struct xdr_stream *xdr)
5036 {
5037 __be32 *p;
5038 uint32_t bmlen;
5039 int status;
5040
5041 status = decode_op_hdr(xdr, OP_SETATTR);
5042 if (status)
5043 return status;
5044 p = xdr_inline_decode(xdr, 4);
5045 if (unlikely(!p))
5046 goto out_overflow;
5047 bmlen = be32_to_cpup(p);
5048 p = xdr_inline_decode(xdr, bmlen << 2);
5049 if (likely(p))
5050 return 0;
5051 out_overflow:
5052 print_overflow_msg(__func__, xdr);
5053 return -EIO;
5054 }
5055
5056 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5057 {
5058 __be32 *p;
5059 uint32_t opnum;
5060 int32_t nfserr;
5061
5062 p = xdr_inline_decode(xdr, 8);
5063 if (unlikely(!p))
5064 goto out_overflow;
5065 opnum = be32_to_cpup(p++);
5066 if (opnum != OP_SETCLIENTID) {
5067 dprintk("nfs: decode_setclientid: Server returned operation"
5068 " %d\n", opnum);
5069 return -EIO;
5070 }
5071 nfserr = be32_to_cpup(p);
5072 if (nfserr == NFS_OK) {
5073 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5074 if (unlikely(!p))
5075 goto out_overflow;
5076 p = xdr_decode_hyper(p, &res->clientid);
5077 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5078 } else if (nfserr == NFSERR_CLID_INUSE) {
5079 uint32_t len;
5080
5081 /* skip netid string */
5082 p = xdr_inline_decode(xdr, 4);
5083 if (unlikely(!p))
5084 goto out_overflow;
5085 len = be32_to_cpup(p);
5086 p = xdr_inline_decode(xdr, len);
5087 if (unlikely(!p))
5088 goto out_overflow;
5089
5090 /* skip uaddr string */
5091 p = xdr_inline_decode(xdr, 4);
5092 if (unlikely(!p))
5093 goto out_overflow;
5094 len = be32_to_cpup(p);
5095 p = xdr_inline_decode(xdr, len);
5096 if (unlikely(!p))
5097 goto out_overflow;
5098 return -NFSERR_CLID_INUSE;
5099 } else
5100 return nfs4_stat_to_errno(nfserr);
5101
5102 return 0;
5103 out_overflow:
5104 print_overflow_msg(__func__, xdr);
5105 return -EIO;
5106 }
5107
5108 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5109 {
5110 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5111 }
5112
5113 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5114 {
5115 __be32 *p;
5116 int status;
5117
5118 status = decode_op_hdr(xdr, OP_WRITE);
5119 if (status)
5120 return status;
5121
5122 p = xdr_inline_decode(xdr, 16);
5123 if (unlikely(!p))
5124 goto out_overflow;
5125 res->count = be32_to_cpup(p++);
5126 res->verf->committed = be32_to_cpup(p++);
5127 memcpy(res->verf->verifier, p, 8);
5128 return 0;
5129 out_overflow:
5130 print_overflow_msg(__func__, xdr);
5131 return -EIO;
5132 }
5133
5134 static int decode_delegreturn(struct xdr_stream *xdr)
5135 {
5136 return decode_op_hdr(xdr, OP_DELEGRETURN);
5137 }
5138
5139 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5140 {
5141 __be32 *p;
5142
5143 p = xdr_inline_decode(xdr, 4);
5144 if (unlikely(!p))
5145 goto out_overflow;
5146 flavor->gss.sec_oid4.len = be32_to_cpup(p);
5147 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5148 goto out_err;
5149
5150 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5151 if (unlikely(!p))
5152 goto out_overflow;
5153 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5154
5155 p = xdr_inline_decode(xdr, 8);
5156 if (unlikely(!p))
5157 goto out_overflow;
5158 flavor->gss.qop4 = be32_to_cpup(p++);
5159 flavor->gss.service = be32_to_cpup(p);
5160
5161 return 0;
5162
5163 out_overflow:
5164 print_overflow_msg(__func__, xdr);
5165 return -EIO;
5166 out_err:
5167 return -EINVAL;
5168 }
5169
5170 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5171 {
5172 struct nfs4_secinfo_flavor *sec_flavor;
5173 int status;
5174 __be32 *p;
5175 int i, num_flavors;
5176
5177 status = decode_op_hdr(xdr, OP_SECINFO);
5178 if (status)
5179 goto out;
5180 p = xdr_inline_decode(xdr, 4);
5181 if (unlikely(!p))
5182 goto out_overflow;
5183
5184 res->flavors->num_flavors = 0;
5185 num_flavors = be32_to_cpup(p);
5186
5187 for (i = 0; i < num_flavors; i++) {
5188 sec_flavor = &res->flavors->flavors[i];
5189 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5190 break;
5191
5192 p = xdr_inline_decode(xdr, 4);
5193 if (unlikely(!p))
5194 goto out_overflow;
5195 sec_flavor->flavor = be32_to_cpup(p);
5196
5197 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5198 status = decode_secinfo_gss(xdr, sec_flavor);
5199 if (status)
5200 goto out;
5201 }
5202 res->flavors->num_flavors++;
5203 }
5204
5205 out:
5206 return status;
5207 out_overflow:
5208 print_overflow_msg(__func__, xdr);
5209 return -EIO;
5210 }
5211
5212 #if defined(CONFIG_NFS_V4_1)
5213 static int decode_exchange_id(struct xdr_stream *xdr,
5214 struct nfs41_exchange_id_res *res)
5215 {
5216 __be32 *p;
5217 uint32_t dummy;
5218 char *dummy_str;
5219 int status;
5220 struct nfs_client *clp = res->client;
5221
5222 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5223 if (status)
5224 return status;
5225
5226 p = xdr_inline_decode(xdr, 8);
5227 if (unlikely(!p))
5228 goto out_overflow;
5229 xdr_decode_hyper(p, &clp->cl_clientid);
5230 p = xdr_inline_decode(xdr, 12);
5231 if (unlikely(!p))
5232 goto out_overflow;
5233 clp->cl_seqid = be32_to_cpup(p++);
5234 clp->cl_exchange_flags = be32_to_cpup(p++);
5235
5236 /* We ask for SP4_NONE */
5237 dummy = be32_to_cpup(p);
5238 if (dummy != SP4_NONE)
5239 return -EIO;
5240
5241 /* Throw away minor_id */
5242 p = xdr_inline_decode(xdr, 8);
5243 if (unlikely(!p))
5244 goto out_overflow;
5245
5246 /* Throw away Major id */
5247 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5248 if (unlikely(status))
5249 return status;
5250
5251 /* Save server_scope */
5252 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5253 if (unlikely(status))
5254 return status;
5255
5256 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5257 return -EIO;
5258
5259 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5260 res->server_scope->server_scope_sz = dummy;
5261
5262 /* Throw away Implementation id array */
5263 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5264 if (unlikely(status))
5265 return status;
5266
5267 return 0;
5268 out_overflow:
5269 print_overflow_msg(__func__, xdr);
5270 return -EIO;
5271 }
5272
5273 static int decode_chan_attrs(struct xdr_stream *xdr,
5274 struct nfs4_channel_attrs *attrs)
5275 {
5276 __be32 *p;
5277 u32 nr_attrs, val;
5278
5279 p = xdr_inline_decode(xdr, 28);
5280 if (unlikely(!p))
5281 goto out_overflow;
5282 val = be32_to_cpup(p++); /* headerpadsz */
5283 if (val)
5284 return -EINVAL; /* no support for header padding yet */
5285 attrs->max_rqst_sz = be32_to_cpup(p++);
5286 attrs->max_resp_sz = be32_to_cpup(p++);
5287 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5288 attrs->max_ops = be32_to_cpup(p++);
5289 attrs->max_reqs = be32_to_cpup(p++);
5290 nr_attrs = be32_to_cpup(p);
5291 if (unlikely(nr_attrs > 1)) {
5292 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5293 __func__, nr_attrs);
5294 return -EINVAL;
5295 }
5296 if (nr_attrs == 1) {
5297 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5298 if (unlikely(!p))
5299 goto out_overflow;
5300 }
5301 return 0;
5302 out_overflow:
5303 print_overflow_msg(__func__, xdr);
5304 return -EIO;
5305 }
5306
5307 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5308 {
5309 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5310 }
5311
5312 static int decode_create_session(struct xdr_stream *xdr,
5313 struct nfs41_create_session_res *res)
5314 {
5315 __be32 *p;
5316 int status;
5317 struct nfs_client *clp = res->client;
5318 struct nfs4_session *session = clp->cl_session;
5319
5320 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5321 if (!status)
5322 status = decode_sessionid(xdr, &session->sess_id);
5323 if (unlikely(status))
5324 return status;
5325
5326 /* seqid, flags */
5327 p = xdr_inline_decode(xdr, 8);
5328 if (unlikely(!p))
5329 goto out_overflow;
5330 clp->cl_seqid = be32_to_cpup(p++);
5331 session->flags = be32_to_cpup(p);
5332
5333 /* Channel attributes */
5334 status = decode_chan_attrs(xdr, &session->fc_attrs);
5335 if (!status)
5336 status = decode_chan_attrs(xdr, &session->bc_attrs);
5337 return status;
5338 out_overflow:
5339 print_overflow_msg(__func__, xdr);
5340 return -EIO;
5341 }
5342
5343 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5344 {
5345 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5346 }
5347
5348 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5349 {
5350 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5351 }
5352 #endif /* CONFIG_NFS_V4_1 */
5353
5354 static int decode_sequence(struct xdr_stream *xdr,
5355 struct nfs4_sequence_res *res,
5356 struct rpc_rqst *rqstp)
5357 {
5358 #if defined(CONFIG_NFS_V4_1)
5359 struct nfs4_sessionid id;
5360 u32 dummy;
5361 int status;
5362 __be32 *p;
5363
5364 if (!res->sr_session)
5365 return 0;
5366
5367 status = decode_op_hdr(xdr, OP_SEQUENCE);
5368 if (!status)
5369 status = decode_sessionid(xdr, &id);
5370 if (unlikely(status))
5371 goto out_err;
5372
5373 /*
5374 * If the server returns different values for sessionID, slotID or
5375 * sequence number, the server is looney tunes.
5376 */
5377 status = -EREMOTEIO;
5378
5379 if (memcmp(id.data, res->sr_session->sess_id.data,
5380 NFS4_MAX_SESSIONID_LEN)) {
5381 dprintk("%s Invalid session id\n", __func__);
5382 goto out_err;
5383 }
5384
5385 p = xdr_inline_decode(xdr, 20);
5386 if (unlikely(!p))
5387 goto out_overflow;
5388
5389 /* seqid */
5390 dummy = be32_to_cpup(p++);
5391 if (dummy != res->sr_slot->seq_nr) {
5392 dprintk("%s Invalid sequence number\n", __func__);
5393 goto out_err;
5394 }
5395 /* slot id */
5396 dummy = be32_to_cpup(p++);
5397 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5398 dprintk("%s Invalid slot id\n", __func__);
5399 goto out_err;
5400 }
5401 /* highest slot id - currently not processed */
5402 dummy = be32_to_cpup(p++);
5403 /* target highest slot id - currently not processed */
5404 dummy = be32_to_cpup(p++);
5405 /* result flags */
5406 res->sr_status_flags = be32_to_cpup(p);
5407 status = 0;
5408 out_err:
5409 res->sr_status = status;
5410 return status;
5411 out_overflow:
5412 print_overflow_msg(__func__, xdr);
5413 status = -EIO;
5414 goto out_err;
5415 #else /* CONFIG_NFS_V4_1 */
5416 return 0;
5417 #endif /* CONFIG_NFS_V4_1 */
5418 }
5419
5420 #if defined(CONFIG_NFS_V4_1)
5421 /*
5422 * TODO: Need to handle case when EOF != true;
5423 */
5424 static int decode_getdevicelist(struct xdr_stream *xdr,
5425 struct pnfs_devicelist *res)
5426 {
5427 __be32 *p;
5428 int status, i;
5429 struct nfs_writeverf verftemp;
5430
5431 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5432 if (status)
5433 return status;
5434
5435 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5436 if (unlikely(!p))
5437 goto out_overflow;
5438
5439 /* TODO: Skip cookie for now */
5440 p += 2;
5441
5442 /* Read verifier */
5443 p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5444
5445 res->num_devs = be32_to_cpup(p);
5446
5447 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5448
5449 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5450 printk(KERN_ERR "%s too many result dev_num %u\n",
5451 __func__, res->num_devs);
5452 return -EIO;
5453 }
5454
5455 p = xdr_inline_decode(xdr,
5456 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5457 if (unlikely(!p))
5458 goto out_overflow;
5459 for (i = 0; i < res->num_devs; i++)
5460 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5461 NFS4_DEVICEID4_SIZE);
5462 res->eof = be32_to_cpup(p);
5463 return 0;
5464 out_overflow:
5465 print_overflow_msg(__func__, xdr);
5466 return -EIO;
5467 }
5468
5469 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5470 struct pnfs_device *pdev)
5471 {
5472 __be32 *p;
5473 uint32_t len, type;
5474 int status;
5475
5476 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5477 if (status) {
5478 if (status == -ETOOSMALL) {
5479 p = xdr_inline_decode(xdr, 4);
5480 if (unlikely(!p))
5481 goto out_overflow;
5482 pdev->mincount = be32_to_cpup(p);
5483 dprintk("%s: Min count too small. mincnt = %u\n",
5484 __func__, pdev->mincount);
5485 }
5486 return status;
5487 }
5488
5489 p = xdr_inline_decode(xdr, 8);
5490 if (unlikely(!p))
5491 goto out_overflow;
5492 type = be32_to_cpup(p++);
5493 if (type != pdev->layout_type) {
5494 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5495 __func__, pdev->layout_type, type);
5496 return -EINVAL;
5497 }
5498 /*
5499 * Get the length of the opaque device_addr4. xdr_read_pages places
5500 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5501 * and places the remaining xdr data in xdr_buf->tail
5502 */
5503 pdev->mincount = be32_to_cpup(p);
5504 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5505
5506 /* Parse notification bitmap, verifying that it is zero. */
5507 p = xdr_inline_decode(xdr, 4);
5508 if (unlikely(!p))
5509 goto out_overflow;
5510 len = be32_to_cpup(p);
5511 if (len) {
5512 uint32_t i;
5513
5514 p = xdr_inline_decode(xdr, 4 * len);
5515 if (unlikely(!p))
5516 goto out_overflow;
5517 for (i = 0; i < len; i++, p++) {
5518 if (be32_to_cpup(p)) {
5519 dprintk("%s: notifications not supported\n",
5520 __func__);
5521 return -EIO;
5522 }
5523 }
5524 }
5525 return 0;
5526 out_overflow:
5527 print_overflow_msg(__func__, xdr);
5528 return -EIO;
5529 }
5530
5531 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5532 struct nfs4_layoutget_res *res)
5533 {
5534 __be32 *p;
5535 int status;
5536 u32 layout_count;
5537 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5538 struct kvec *iov = rcvbuf->head;
5539 u32 hdrlen, recvd;
5540
5541 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5542 if (status)
5543 return status;
5544 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5545 if (unlikely(!p))
5546 goto out_overflow;
5547 res->return_on_close = be32_to_cpup(p++);
5548 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5549 layout_count = be32_to_cpup(p);
5550 if (!layout_count) {
5551 dprintk("%s: server responded with empty layout array\n",
5552 __func__);
5553 return -EINVAL;
5554 }
5555
5556 p = xdr_inline_decode(xdr, 28);
5557 if (unlikely(!p))
5558 goto out_overflow;
5559 p = xdr_decode_hyper(p, &res->range.offset);
5560 p = xdr_decode_hyper(p, &res->range.length);
5561 res->range.iomode = be32_to_cpup(p++);
5562 res->type = be32_to_cpup(p++);
5563 res->layoutp->len = be32_to_cpup(p);
5564
5565 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5566 __func__,
5567 (unsigned long)res->range.offset,
5568 (unsigned long)res->range.length,
5569 res->range.iomode,
5570 res->type,
5571 res->layoutp->len);
5572
5573 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5574 recvd = req->rq_rcv_buf.len - hdrlen;
5575 if (res->layoutp->len > recvd) {
5576 dprintk("NFS: server cheating in layoutget reply: "
5577 "layout len %u > recvd %u\n",
5578 res->layoutp->len, recvd);
5579 return -EINVAL;
5580 }
5581
5582 xdr_read_pages(xdr, res->layoutp->len);
5583
5584 if (layout_count > 1) {
5585 /* We only handle a length one array at the moment. Any
5586 * further entries are just ignored. Note that this means
5587 * the client may see a response that is less than the
5588 * minimum it requested.
5589 */
5590 dprintk("%s: server responded with %d layouts, dropping tail\n",
5591 __func__, layout_count);
5592 }
5593
5594 return 0;
5595 out_overflow:
5596 print_overflow_msg(__func__, xdr);
5597 return -EIO;
5598 }
5599
5600 static int decode_layoutreturn(struct xdr_stream *xdr,
5601 struct nfs4_layoutreturn_res *res)
5602 {
5603 __be32 *p;
5604 int status;
5605
5606 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5607 if (status)
5608 return status;
5609 p = xdr_inline_decode(xdr, 4);
5610 if (unlikely(!p))
5611 goto out_overflow;
5612 res->lrs_present = be32_to_cpup(p);
5613 if (res->lrs_present)
5614 status = decode_stateid(xdr, &res->stateid);
5615 return status;
5616 out_overflow:
5617 print_overflow_msg(__func__, xdr);
5618 return -EIO;
5619 }
5620
5621 static int decode_layoutcommit(struct xdr_stream *xdr,
5622 struct rpc_rqst *req,
5623 struct nfs4_layoutcommit_res *res)
5624 {
5625 __be32 *p;
5626 __u32 sizechanged;
5627 int status;
5628
5629 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5630 res->status = status;
5631 if (status)
5632 return status;
5633
5634 p = xdr_inline_decode(xdr, 4);
5635 if (unlikely(!p))
5636 goto out_overflow;
5637 sizechanged = be32_to_cpup(p);
5638
5639 if (sizechanged) {
5640 /* throw away new size */
5641 p = xdr_inline_decode(xdr, 8);
5642 if (unlikely(!p))
5643 goto out_overflow;
5644 }
5645 return 0;
5646 out_overflow:
5647 print_overflow_msg(__func__, xdr);
5648 return -EIO;
5649 }
5650
5651 static int decode_test_stateid(struct xdr_stream *xdr,
5652 struct nfs41_test_stateid_res *res)
5653 {
5654 __be32 *p;
5655 int status;
5656 int num_res;
5657
5658 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5659 if (status)
5660 return status;
5661
5662 p = xdr_inline_decode(xdr, 4);
5663 if (unlikely(!p))
5664 goto out_overflow;
5665 num_res = be32_to_cpup(p++);
5666 if (num_res != 1)
5667 goto out;
5668
5669 p = xdr_inline_decode(xdr, 4);
5670 if (unlikely(!p))
5671 goto out_overflow;
5672 res->status = be32_to_cpup(p++);
5673 return res->status;
5674 out_overflow:
5675 print_overflow_msg(__func__, xdr);
5676 out:
5677 return -EIO;
5678 }
5679
5680 static int decode_free_stateid(struct xdr_stream *xdr,
5681 struct nfs41_free_stateid_res *res)
5682 {
5683 __be32 *p;
5684 int status;
5685
5686 status = decode_op_hdr(xdr, OP_FREE_STATEID);
5687 if (status)
5688 return status;
5689
5690 p = xdr_inline_decode(xdr, 4);
5691 if (unlikely(!p))
5692 goto out_overflow;
5693 res->status = be32_to_cpup(p++);
5694 return res->status;
5695 out_overflow:
5696 print_overflow_msg(__func__, xdr);
5697 return -EIO;
5698 }
5699 #endif /* CONFIG_NFS_V4_1 */
5700
5701 /*
5702 * END OF "GENERIC" DECODE ROUTINES.
5703 */
5704
5705 /*
5706 * Decode OPEN_DOWNGRADE response
5707 */
5708 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5709 struct xdr_stream *xdr,
5710 struct nfs_closeres *res)
5711 {
5712 struct compound_hdr hdr;
5713 int status;
5714
5715 status = decode_compound_hdr(xdr, &hdr);
5716 if (status)
5717 goto out;
5718 status = decode_sequence(xdr, &res->seq_res, rqstp);
5719 if (status)
5720 goto out;
5721 status = decode_putfh(xdr);
5722 if (status)
5723 goto out;
5724 status = decode_open_downgrade(xdr, res);
5725 if (status != 0)
5726 goto out;
5727 decode_getfattr(xdr, res->fattr, res->server);
5728 out:
5729 return status;
5730 }
5731
5732 /*
5733 * Decode ACCESS response
5734 */
5735 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5736 struct nfs4_accessres *res)
5737 {
5738 struct compound_hdr hdr;
5739 int status;
5740
5741 status = decode_compound_hdr(xdr, &hdr);
5742 if (status)
5743 goto out;
5744 status = decode_sequence(xdr, &res->seq_res, rqstp);
5745 if (status)
5746 goto out;
5747 status = decode_putfh(xdr);
5748 if (status != 0)
5749 goto out;
5750 status = decode_access(xdr, res);
5751 if (status != 0)
5752 goto out;
5753 decode_getfattr(xdr, res->fattr, res->server);
5754 out:
5755 return status;
5756 }
5757
5758 /*
5759 * Decode LOOKUP response
5760 */
5761 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5762 struct nfs4_lookup_res *res)
5763 {
5764 struct compound_hdr hdr;
5765 int status;
5766
5767 status = decode_compound_hdr(xdr, &hdr);
5768 if (status)
5769 goto out;
5770 status = decode_sequence(xdr, &res->seq_res, rqstp);
5771 if (status)
5772 goto out;
5773 status = decode_putfh(xdr);
5774 if (status)
5775 goto out;
5776 status = decode_lookup(xdr);
5777 if (status)
5778 goto out;
5779 status = decode_getfh(xdr, res->fh);
5780 if (status)
5781 goto out;
5782 status = decode_getfattr(xdr, res->fattr, res->server);
5783 out:
5784 return status;
5785 }
5786
5787 /*
5788 * Decode LOOKUP_ROOT response
5789 */
5790 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5791 struct xdr_stream *xdr,
5792 struct nfs4_lookup_res *res)
5793 {
5794 struct compound_hdr hdr;
5795 int status;
5796
5797 status = decode_compound_hdr(xdr, &hdr);
5798 if (status)
5799 goto out;
5800 status = decode_sequence(xdr, &res->seq_res, rqstp);
5801 if (status)
5802 goto out;
5803 status = decode_putrootfh(xdr);
5804 if (status)
5805 goto out;
5806 status = decode_getfh(xdr, res->fh);
5807 if (status == 0)
5808 status = decode_getfattr(xdr, res->fattr, res->server);
5809 out:
5810 return status;
5811 }
5812
5813 /*
5814 * Decode REMOVE response
5815 */
5816 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5817 struct nfs_removeres *res)
5818 {
5819 struct compound_hdr hdr;
5820 int status;
5821
5822 status = decode_compound_hdr(xdr, &hdr);
5823 if (status)
5824 goto out;
5825 status = decode_sequence(xdr, &res->seq_res, rqstp);
5826 if (status)
5827 goto out;
5828 status = decode_putfh(xdr);
5829 if (status)
5830 goto out;
5831 status = decode_remove(xdr, &res->cinfo);
5832 if (status)
5833 goto out;
5834 decode_getfattr(xdr, res->dir_attr, res->server);
5835 out:
5836 return status;
5837 }
5838
5839 /*
5840 * Decode RENAME response
5841 */
5842 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5843 struct nfs_renameres *res)
5844 {
5845 struct compound_hdr hdr;
5846 int status;
5847
5848 status = decode_compound_hdr(xdr, &hdr);
5849 if (status)
5850 goto out;
5851 status = decode_sequence(xdr, &res->seq_res, rqstp);
5852 if (status)
5853 goto out;
5854 status = decode_putfh(xdr);
5855 if (status)
5856 goto out;
5857 status = decode_savefh(xdr);
5858 if (status)
5859 goto out;
5860 status = decode_putfh(xdr);
5861 if (status)
5862 goto out;
5863 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5864 if (status)
5865 goto out;
5866 /* Current FH is target directory */
5867 if (decode_getfattr(xdr, res->new_fattr, res->server))
5868 goto out;
5869 status = decode_restorefh(xdr);
5870 if (status)
5871 goto out;
5872 decode_getfattr(xdr, res->old_fattr, res->server);
5873 out:
5874 return status;
5875 }
5876
5877 /*
5878 * Decode LINK response
5879 */
5880 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5881 struct nfs4_link_res *res)
5882 {
5883 struct compound_hdr hdr;
5884 int status;
5885
5886 status = decode_compound_hdr(xdr, &hdr);
5887 if (status)
5888 goto out;
5889 status = decode_sequence(xdr, &res->seq_res, rqstp);
5890 if (status)
5891 goto out;
5892 status = decode_putfh(xdr);
5893 if (status)
5894 goto out;
5895 status = decode_savefh(xdr);
5896 if (status)
5897 goto out;
5898 status = decode_putfh(xdr);
5899 if (status)
5900 goto out;
5901 status = decode_link(xdr, &res->cinfo);
5902 if (status)
5903 goto out;
5904 /*
5905 * Note order: OP_LINK leaves the directory as the current
5906 * filehandle.
5907 */
5908 if (decode_getfattr(xdr, res->dir_attr, res->server))
5909 goto out;
5910 status = decode_restorefh(xdr);
5911 if (status)
5912 goto out;
5913 decode_getfattr(xdr, res->fattr, res->server);
5914 out:
5915 return status;
5916 }
5917
5918 /*
5919 * Decode CREATE response
5920 */
5921 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5922 struct nfs4_create_res *res)
5923 {
5924 struct compound_hdr hdr;
5925 int status;
5926
5927 status = decode_compound_hdr(xdr, &hdr);
5928 if (status)
5929 goto out;
5930 status = decode_sequence(xdr, &res->seq_res, rqstp);
5931 if (status)
5932 goto out;
5933 status = decode_putfh(xdr);
5934 if (status)
5935 goto out;
5936 status = decode_savefh(xdr);
5937 if (status)
5938 goto out;
5939 status = decode_create(xdr, &res->dir_cinfo);
5940 if (status)
5941 goto out;
5942 status = decode_getfh(xdr, res->fh);
5943 if (status)
5944 goto out;
5945 if (decode_getfattr(xdr, res->fattr, res->server))
5946 goto out;
5947 status = decode_restorefh(xdr);
5948 if (status)
5949 goto out;
5950 decode_getfattr(xdr, res->dir_fattr, res->server);
5951 out:
5952 return status;
5953 }
5954
5955 /*
5956 * Decode SYMLINK response
5957 */
5958 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5959 struct nfs4_create_res *res)
5960 {
5961 return nfs4_xdr_dec_create(rqstp, xdr, res);
5962 }
5963
5964 /*
5965 * Decode GETATTR response
5966 */
5967 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5968 struct nfs4_getattr_res *res)
5969 {
5970 struct compound_hdr hdr;
5971 int status;
5972
5973 status = decode_compound_hdr(xdr, &hdr);
5974 if (status)
5975 goto out;
5976 status = decode_sequence(xdr, &res->seq_res, rqstp);
5977 if (status)
5978 goto out;
5979 status = decode_putfh(xdr);
5980 if (status)
5981 goto out;
5982 status = decode_getfattr(xdr, res->fattr, res->server);
5983 out:
5984 return status;
5985 }
5986
5987 /*
5988 * Encode an SETACL request
5989 */
5990 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5991 struct nfs_setaclargs *args)
5992 {
5993 struct compound_hdr hdr = {
5994 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5995 };
5996
5997 encode_compound_hdr(xdr, req, &hdr);
5998 encode_sequence(xdr, &args->seq_args, &hdr);
5999 encode_putfh(xdr, args->fh, &hdr);
6000 encode_setacl(xdr, args, &hdr);
6001 encode_nops(&hdr);
6002 }
6003
6004 /*
6005 * Decode SETACL response
6006 */
6007 static int
6008 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009 struct nfs_setaclres *res)
6010 {
6011 struct compound_hdr hdr;
6012 int status;
6013
6014 status = decode_compound_hdr(xdr, &hdr);
6015 if (status)
6016 goto out;
6017 status = decode_sequence(xdr, &res->seq_res, rqstp);
6018 if (status)
6019 goto out;
6020 status = decode_putfh(xdr);
6021 if (status)
6022 goto out;
6023 status = decode_setattr(xdr);
6024 out:
6025 return status;
6026 }
6027
6028 /*
6029 * Decode GETACL response
6030 */
6031 static int
6032 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6033 struct nfs_getaclres *res)
6034 {
6035 struct compound_hdr hdr;
6036 int status;
6037
6038 if (res->acl_scratch != NULL) {
6039 void *p = page_address(res->acl_scratch);
6040 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6041 }
6042 status = decode_compound_hdr(xdr, &hdr);
6043 if (status)
6044 goto out;
6045 status = decode_sequence(xdr, &res->seq_res, rqstp);
6046 if (status)
6047 goto out;
6048 status = decode_putfh(xdr);
6049 if (status)
6050 goto out;
6051 status = decode_getacl(xdr, rqstp, res);
6052
6053 out:
6054 return status;
6055 }
6056
6057 /*
6058 * Decode CLOSE response
6059 */
6060 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6061 struct nfs_closeres *res)
6062 {
6063 struct compound_hdr hdr;
6064 int status;
6065
6066 status = decode_compound_hdr(xdr, &hdr);
6067 if (status)
6068 goto out;
6069 status = decode_sequence(xdr, &res->seq_res, rqstp);
6070 if (status)
6071 goto out;
6072 status = decode_putfh(xdr);
6073 if (status)
6074 goto out;
6075 status = decode_close(xdr, res);
6076 if (status != 0)
6077 goto out;
6078 /*
6079 * Note: Server may do delete on close for this file
6080 * in which case the getattr call will fail with
6081 * an ESTALE error. Shouldn't be a problem,
6082 * though, since fattr->valid will remain unset.
6083 */
6084 decode_getfattr(xdr, res->fattr, res->server);
6085 out:
6086 return status;
6087 }
6088
6089 /*
6090 * Decode OPEN response
6091 */
6092 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6093 struct nfs_openres *res)
6094 {
6095 struct compound_hdr hdr;
6096 int status;
6097
6098 status = decode_compound_hdr(xdr, &hdr);
6099 if (status)
6100 goto out;
6101 status = decode_sequence(xdr, &res->seq_res, rqstp);
6102 if (status)
6103 goto out;
6104 status = decode_putfh(xdr);
6105 if (status)
6106 goto out;
6107 status = decode_savefh(xdr);
6108 if (status)
6109 goto out;
6110 status = decode_open(xdr, res);
6111 if (status)
6112 goto out;
6113 if (decode_getfh(xdr, &res->fh) != 0)
6114 goto out;
6115 if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6116 goto out;
6117 if (decode_restorefh(xdr) != 0)
6118 goto out;
6119 decode_getfattr(xdr, res->dir_attr, res->server);
6120 out:
6121 return status;
6122 }
6123
6124 /*
6125 * Decode OPEN_CONFIRM response
6126 */
6127 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6128 struct xdr_stream *xdr,
6129 struct nfs_open_confirmres *res)
6130 {
6131 struct compound_hdr hdr;
6132 int status;
6133
6134 status = decode_compound_hdr(xdr, &hdr);
6135 if (status)
6136 goto out;
6137 status = decode_putfh(xdr);
6138 if (status)
6139 goto out;
6140 status = decode_open_confirm(xdr, res);
6141 out:
6142 return status;
6143 }
6144
6145 /*
6146 * Decode OPEN response
6147 */
6148 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6149 struct xdr_stream *xdr,
6150 struct nfs_openres *res)
6151 {
6152 struct compound_hdr hdr;
6153 int status;
6154
6155 status = decode_compound_hdr(xdr, &hdr);
6156 if (status)
6157 goto out;
6158 status = decode_sequence(xdr, &res->seq_res, rqstp);
6159 if (status)
6160 goto out;
6161 status = decode_putfh(xdr);
6162 if (status)
6163 goto out;
6164 status = decode_open(xdr, res);
6165 if (status)
6166 goto out;
6167 decode_getfattr(xdr, res->f_attr, res->server);
6168 out:
6169 return status;
6170 }
6171
6172 /*
6173 * Decode SETATTR response
6174 */
6175 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6176 struct xdr_stream *xdr,
6177 struct nfs_setattrres *res)
6178 {
6179 struct compound_hdr hdr;
6180 int status;
6181
6182 status = decode_compound_hdr(xdr, &hdr);
6183 if (status)
6184 goto out;
6185 status = decode_sequence(xdr, &res->seq_res, rqstp);
6186 if (status)
6187 goto out;
6188 status = decode_putfh(xdr);
6189 if (status)
6190 goto out;
6191 status = decode_setattr(xdr);
6192 if (status)
6193 goto out;
6194 decode_getfattr(xdr, res->fattr, res->server);
6195 out:
6196 return status;
6197 }
6198
6199 /*
6200 * Decode LOCK response
6201 */
6202 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 struct nfs_lock_res *res)
6204 {
6205 struct compound_hdr hdr;
6206 int status;
6207
6208 status = decode_compound_hdr(xdr, &hdr);
6209 if (status)
6210 goto out;
6211 status = decode_sequence(xdr, &res->seq_res, rqstp);
6212 if (status)
6213 goto out;
6214 status = decode_putfh(xdr);
6215 if (status)
6216 goto out;
6217 status = decode_lock(xdr, res);
6218 out:
6219 return status;
6220 }
6221
6222 /*
6223 * Decode LOCKT response
6224 */
6225 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226 struct nfs_lockt_res *res)
6227 {
6228 struct compound_hdr hdr;
6229 int status;
6230
6231 status = decode_compound_hdr(xdr, &hdr);
6232 if (status)
6233 goto out;
6234 status = decode_sequence(xdr, &res->seq_res, rqstp);
6235 if (status)
6236 goto out;
6237 status = decode_putfh(xdr);
6238 if (status)
6239 goto out;
6240 status = decode_lockt(xdr, res);
6241 out:
6242 return status;
6243 }
6244
6245 /*
6246 * Decode LOCKU response
6247 */
6248 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249 struct nfs_locku_res *res)
6250 {
6251 struct compound_hdr hdr;
6252 int status;
6253
6254 status = decode_compound_hdr(xdr, &hdr);
6255 if (status)
6256 goto out;
6257 status = decode_sequence(xdr, &res->seq_res, rqstp);
6258 if (status)
6259 goto out;
6260 status = decode_putfh(xdr);
6261 if (status)
6262 goto out;
6263 status = decode_locku(xdr, res);
6264 out:
6265 return status;
6266 }
6267
6268 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6269 struct xdr_stream *xdr, void *dummy)
6270 {
6271 struct compound_hdr hdr;
6272 int status;
6273
6274 status = decode_compound_hdr(xdr, &hdr);
6275 if (!status)
6276 status = decode_release_lockowner(xdr);
6277 return status;
6278 }
6279
6280 /*
6281 * Decode READLINK response
6282 */
6283 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6284 struct xdr_stream *xdr,
6285 struct nfs4_readlink_res *res)
6286 {
6287 struct compound_hdr hdr;
6288 int status;
6289
6290 status = decode_compound_hdr(xdr, &hdr);
6291 if (status)
6292 goto out;
6293 status = decode_sequence(xdr, &res->seq_res, rqstp);
6294 if (status)
6295 goto out;
6296 status = decode_putfh(xdr);
6297 if (status)
6298 goto out;
6299 status = decode_readlink(xdr, rqstp);
6300 out:
6301 return status;
6302 }
6303
6304 /*
6305 * Decode READDIR response
6306 */
6307 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6308 struct nfs4_readdir_res *res)
6309 {
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_readdir(xdr, rqstp, res);
6323 out:
6324 return status;
6325 }
6326
6327 /*
6328 * Decode Read response
6329 */
6330 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6331 struct nfs_readres *res)
6332 {
6333 struct compound_hdr hdr;
6334 int status;
6335
6336 status = decode_compound_hdr(xdr, &hdr);
6337 if (status)
6338 goto out;
6339 status = decode_sequence(xdr, &res->seq_res, rqstp);
6340 if (status)
6341 goto out;
6342 status = decode_putfh(xdr);
6343 if (status)
6344 goto out;
6345 status = decode_read(xdr, rqstp, res);
6346 if (!status)
6347 status = res->count;
6348 out:
6349 return status;
6350 }
6351
6352 /*
6353 * Decode WRITE response
6354 */
6355 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356 struct nfs_writeres *res)
6357 {
6358 struct compound_hdr hdr;
6359 int status;
6360
6361 status = decode_compound_hdr(xdr, &hdr);
6362 if (status)
6363 goto out;
6364 status = decode_sequence(xdr, &res->seq_res, rqstp);
6365 if (status)
6366 goto out;
6367 status = decode_putfh(xdr);
6368 if (status)
6369 goto out;
6370 status = decode_write(xdr, res);
6371 if (status)
6372 goto out;
6373 if (res->fattr)
6374 decode_getfattr(xdr, res->fattr, res->server);
6375 if (!status)
6376 status = res->count;
6377 out:
6378 return status;
6379 }
6380
6381 /*
6382 * Decode COMMIT response
6383 */
6384 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385 struct nfs_writeres *res)
6386 {
6387 struct compound_hdr hdr;
6388 int status;
6389
6390 status = decode_compound_hdr(xdr, &hdr);
6391 if (status)
6392 goto out;
6393 status = decode_sequence(xdr, &res->seq_res, rqstp);
6394 if (status)
6395 goto out;
6396 status = decode_putfh(xdr);
6397 if (status)
6398 goto out;
6399 status = decode_commit(xdr, res);
6400 if (status)
6401 goto out;
6402 if (res->fattr)
6403 decode_getfattr(xdr, res->fattr, res->server);
6404 out:
6405 return status;
6406 }
6407
6408 /*
6409 * Decode FSINFO response
6410 */
6411 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6412 struct nfs4_fsinfo_res *res)
6413 {
6414 struct compound_hdr hdr;
6415 int status;
6416
6417 status = decode_compound_hdr(xdr, &hdr);
6418 if (!status)
6419 status = decode_sequence(xdr, &res->seq_res, req);
6420 if (!status)
6421 status = decode_putfh(xdr);
6422 if (!status)
6423 status = decode_fsinfo(xdr, res->fsinfo);
6424 return status;
6425 }
6426
6427 /*
6428 * Decode PATHCONF response
6429 */
6430 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6431 struct nfs4_pathconf_res *res)
6432 {
6433 struct compound_hdr hdr;
6434 int status;
6435
6436 status = decode_compound_hdr(xdr, &hdr);
6437 if (!status)
6438 status = decode_sequence(xdr, &res->seq_res, req);
6439 if (!status)
6440 status = decode_putfh(xdr);
6441 if (!status)
6442 status = decode_pathconf(xdr, res->pathconf);
6443 return status;
6444 }
6445
6446 /*
6447 * Decode STATFS response
6448 */
6449 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6450 struct nfs4_statfs_res *res)
6451 {
6452 struct compound_hdr hdr;
6453 int status;
6454
6455 status = decode_compound_hdr(xdr, &hdr);
6456 if (!status)
6457 status = decode_sequence(xdr, &res->seq_res, req);
6458 if (!status)
6459 status = decode_putfh(xdr);
6460 if (!status)
6461 status = decode_statfs(xdr, res->fsstat);
6462 return status;
6463 }
6464
6465 /*
6466 * Decode GETATTR_BITMAP response
6467 */
6468 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6469 struct xdr_stream *xdr,
6470 struct nfs4_server_caps_res *res)
6471 {
6472 struct compound_hdr hdr;
6473 int status;
6474
6475 status = decode_compound_hdr(xdr, &hdr);
6476 if (status)
6477 goto out;
6478 status = decode_sequence(xdr, &res->seq_res, req);
6479 if (status)
6480 goto out;
6481 status = decode_putfh(xdr);
6482 if (status)
6483 goto out;
6484 status = decode_server_caps(xdr, res);
6485 out:
6486 return status;
6487 }
6488
6489 /*
6490 * Decode RENEW response
6491 */
6492 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6493 void *__unused)
6494 {
6495 struct compound_hdr hdr;
6496 int status;
6497
6498 status = decode_compound_hdr(xdr, &hdr);
6499 if (!status)
6500 status = decode_renew(xdr);
6501 return status;
6502 }
6503
6504 /*
6505 * Decode SETCLIENTID response
6506 */
6507 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6508 struct xdr_stream *xdr,
6509 struct nfs4_setclientid_res *res)
6510 {
6511 struct compound_hdr hdr;
6512 int status;
6513
6514 status = decode_compound_hdr(xdr, &hdr);
6515 if (!status)
6516 status = decode_setclientid(xdr, res);
6517 return status;
6518 }
6519
6520 /*
6521 * Decode SETCLIENTID_CONFIRM response
6522 */
6523 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6524 struct xdr_stream *xdr,
6525 struct nfs_fsinfo *fsinfo)
6526 {
6527 struct compound_hdr hdr;
6528 int status;
6529
6530 status = decode_compound_hdr(xdr, &hdr);
6531 if (!status)
6532 status = decode_setclientid_confirm(xdr);
6533 if (!status)
6534 status = decode_putrootfh(xdr);
6535 if (!status)
6536 status = decode_fsinfo(xdr, fsinfo);
6537 return status;
6538 }
6539
6540 /*
6541 * Decode DELEGRETURN response
6542 */
6543 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6544 struct xdr_stream *xdr,
6545 struct nfs4_delegreturnres *res)
6546 {
6547 struct compound_hdr hdr;
6548 int status;
6549
6550 status = decode_compound_hdr(xdr, &hdr);
6551 if (status)
6552 goto out;
6553 status = decode_sequence(xdr, &res->seq_res, rqstp);
6554 if (status)
6555 goto out;
6556 status = decode_putfh(xdr);
6557 if (status != 0)
6558 goto out;
6559 status = decode_delegreturn(xdr);
6560 if (status != 0)
6561 goto out;
6562 decode_getfattr(xdr, res->fattr, res->server);
6563 out:
6564 return status;
6565 }
6566
6567 /*
6568 * Decode FS_LOCATIONS response
6569 */
6570 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6571 struct xdr_stream *xdr,
6572 struct nfs4_fs_locations_res *res)
6573 {
6574 struct compound_hdr hdr;
6575 int status;
6576
6577 status = decode_compound_hdr(xdr, &hdr);
6578 if (status)
6579 goto out;
6580 status = decode_sequence(xdr, &res->seq_res, req);
6581 if (status)
6582 goto out;
6583 status = decode_putfh(xdr);
6584 if (status)
6585 goto out;
6586 status = decode_lookup(xdr);
6587 if (status)
6588 goto out;
6589 xdr_enter_page(xdr, PAGE_SIZE);
6590 status = decode_getfattr(xdr, &res->fs_locations->fattr,
6591 res->fs_locations->server);
6592 out:
6593 return status;
6594 }
6595
6596 /*
6597 * Decode SECINFO response
6598 */
6599 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6600 struct xdr_stream *xdr,
6601 struct nfs4_secinfo_res *res)
6602 {
6603 struct compound_hdr hdr;
6604 int status;
6605
6606 status = decode_compound_hdr(xdr, &hdr);
6607 if (status)
6608 goto out;
6609 status = decode_sequence(xdr, &res->seq_res, rqstp);
6610 if (status)
6611 goto out;
6612 status = decode_putfh(xdr);
6613 if (status)
6614 goto out;
6615 status = decode_secinfo(xdr, res);
6616 out:
6617 return status;
6618 }
6619
6620 #if defined(CONFIG_NFS_V4_1)
6621 /*
6622 * Decode EXCHANGE_ID response
6623 */
6624 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6625 struct xdr_stream *xdr,
6626 void *res)
6627 {
6628 struct compound_hdr hdr;
6629 int status;
6630
6631 status = decode_compound_hdr(xdr, &hdr);
6632 if (!status)
6633 status = decode_exchange_id(xdr, res);
6634 return status;
6635 }
6636
6637 /*
6638 * Decode CREATE_SESSION response
6639 */
6640 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6641 struct xdr_stream *xdr,
6642 struct nfs41_create_session_res *res)
6643 {
6644 struct compound_hdr hdr;
6645 int status;
6646
6647 status = decode_compound_hdr(xdr, &hdr);
6648 if (!status)
6649 status = decode_create_session(xdr, res);
6650 return status;
6651 }
6652
6653 /*
6654 * Decode DESTROY_SESSION response
6655 */
6656 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6657 struct xdr_stream *xdr,
6658 void *res)
6659 {
6660 struct compound_hdr hdr;
6661 int status;
6662
6663 status = decode_compound_hdr(xdr, &hdr);
6664 if (!status)
6665 status = decode_destroy_session(xdr, res);
6666 return status;
6667 }
6668
6669 /*
6670 * Decode SEQUENCE response
6671 */
6672 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6673 struct xdr_stream *xdr,
6674 struct nfs4_sequence_res *res)
6675 {
6676 struct compound_hdr hdr;
6677 int status;
6678
6679 status = decode_compound_hdr(xdr, &hdr);
6680 if (!status)
6681 status = decode_sequence(xdr, res, rqstp);
6682 return status;
6683 }
6684
6685 /*
6686 * Decode GET_LEASE_TIME response
6687 */
6688 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6689 struct xdr_stream *xdr,
6690 struct nfs4_get_lease_time_res *res)
6691 {
6692 struct compound_hdr hdr;
6693 int status;
6694
6695 status = decode_compound_hdr(xdr, &hdr);
6696 if (!status)
6697 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6698 if (!status)
6699 status = decode_putrootfh(xdr);
6700 if (!status)
6701 status = decode_fsinfo(xdr, res->lr_fsinfo);
6702 return status;
6703 }
6704
6705 /*
6706 * Decode RECLAIM_COMPLETE response
6707 */
6708 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6709 struct xdr_stream *xdr,
6710 struct nfs41_reclaim_complete_res *res)
6711 {
6712 struct compound_hdr hdr;
6713 int status;
6714
6715 status = decode_compound_hdr(xdr, &hdr);
6716 if (!status)
6717 status = decode_sequence(xdr, &res->seq_res, rqstp);
6718 if (!status)
6719 status = decode_reclaim_complete(xdr, (void *)NULL);
6720 return status;
6721 }
6722
6723 /*
6724 * Decode GETDEVICELIST response
6725 */
6726 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6727 struct xdr_stream *xdr,
6728 struct nfs4_getdevicelist_res *res)
6729 {
6730 struct compound_hdr hdr;
6731 int status;
6732
6733 dprintk("encoding getdevicelist!\n");
6734
6735 status = decode_compound_hdr(xdr, &hdr);
6736 if (status != 0)
6737 goto out;
6738 status = decode_sequence(xdr, &res->seq_res, rqstp);
6739 if (status != 0)
6740 goto out;
6741 status = decode_putfh(xdr);
6742 if (status != 0)
6743 goto out;
6744 status = decode_getdevicelist(xdr, res->devlist);
6745 out:
6746 return status;
6747 }
6748
6749 /*
6750 * Decode GETDEVINFO response
6751 */
6752 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6753 struct xdr_stream *xdr,
6754 struct nfs4_getdeviceinfo_res *res)
6755 {
6756 struct compound_hdr hdr;
6757 int status;
6758
6759 status = decode_compound_hdr(xdr, &hdr);
6760 if (status != 0)
6761 goto out;
6762 status = decode_sequence(xdr, &res->seq_res, rqstp);
6763 if (status != 0)
6764 goto out;
6765 status = decode_getdeviceinfo(xdr, res->pdev);
6766 out:
6767 return status;
6768 }
6769
6770 /*
6771 * Decode LAYOUTGET response
6772 */
6773 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6774 struct xdr_stream *xdr,
6775 struct nfs4_layoutget_res *res)
6776 {
6777 struct compound_hdr hdr;
6778 int status;
6779
6780 status = decode_compound_hdr(xdr, &hdr);
6781 if (status)
6782 goto out;
6783 status = decode_sequence(xdr, &res->seq_res, rqstp);
6784 if (status)
6785 goto out;
6786 status = decode_putfh(xdr);
6787 if (status)
6788 goto out;
6789 status = decode_layoutget(xdr, rqstp, res);
6790 out:
6791 return status;
6792 }
6793
6794 /*
6795 * Decode LAYOUTRETURN response
6796 */
6797 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6798 struct xdr_stream *xdr,
6799 struct nfs4_layoutreturn_res *res)
6800 {
6801 struct compound_hdr hdr;
6802 int status;
6803
6804 status = decode_compound_hdr(xdr, &hdr);
6805 if (status)
6806 goto out;
6807 status = decode_sequence(xdr, &res->seq_res, rqstp);
6808 if (status)
6809 goto out;
6810 status = decode_putfh(xdr);
6811 if (status)
6812 goto out;
6813 status = decode_layoutreturn(xdr, res);
6814 out:
6815 return status;
6816 }
6817
6818 /*
6819 * Decode LAYOUTCOMMIT response
6820 */
6821 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6822 struct xdr_stream *xdr,
6823 struct nfs4_layoutcommit_res *res)
6824 {
6825 struct compound_hdr hdr;
6826 int status;
6827
6828 status = decode_compound_hdr(xdr, &hdr);
6829 if (status)
6830 goto out;
6831 status = decode_sequence(xdr, &res->seq_res, rqstp);
6832 if (status)
6833 goto out;
6834 status = decode_putfh(xdr);
6835 if (status)
6836 goto out;
6837 status = decode_layoutcommit(xdr, rqstp, res);
6838 if (status)
6839 goto out;
6840 decode_getfattr(xdr, res->fattr, res->server);
6841 out:
6842 return status;
6843 }
6844
6845 /*
6846 * Decode SECINFO_NO_NAME response
6847 */
6848 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6849 struct xdr_stream *xdr,
6850 struct nfs4_secinfo_res *res)
6851 {
6852 struct compound_hdr hdr;
6853 int status;
6854
6855 status = decode_compound_hdr(xdr, &hdr);
6856 if (status)
6857 goto out;
6858 status = decode_sequence(xdr, &res->seq_res, rqstp);
6859 if (status)
6860 goto out;
6861 status = decode_putrootfh(xdr);
6862 if (status)
6863 goto out;
6864 status = decode_secinfo(xdr, res);
6865 out:
6866 return status;
6867 }
6868
6869 /*
6870 * Decode TEST_STATEID response
6871 */
6872 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6873 struct xdr_stream *xdr,
6874 struct nfs41_test_stateid_res *res)
6875 {
6876 struct compound_hdr hdr;
6877 int status;
6878
6879 status = decode_compound_hdr(xdr, &hdr);
6880 if (status)
6881 goto out;
6882 status = decode_sequence(xdr, &res->seq_res, rqstp);
6883 if (status)
6884 goto out;
6885 status = decode_test_stateid(xdr, res);
6886 out:
6887 return status;
6888 }
6889
6890 /*
6891 * Decode FREE_STATEID response
6892 */
6893 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6894 struct xdr_stream *xdr,
6895 struct nfs41_free_stateid_res *res)
6896 {
6897 struct compound_hdr hdr;
6898 int status;
6899
6900 status = decode_compound_hdr(xdr, &hdr);
6901 if (status)
6902 goto out;
6903 status = decode_sequence(xdr, &res->seq_res, rqstp);
6904 if (status)
6905 goto out;
6906 status = decode_free_stateid(xdr, res);
6907 out:
6908 return status;
6909 }
6910 #endif /* CONFIG_NFS_V4_1 */
6911
6912 /**
6913 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6914 * the local page cache.
6915 * @xdr: XDR stream where entry resides
6916 * @entry: buffer to fill in with entry data
6917 * @plus: boolean indicating whether this should be a readdirplus entry
6918 *
6919 * Returns zero if successful, otherwise a negative errno value is
6920 * returned.
6921 *
6922 * This function is not invoked during READDIR reply decoding, but
6923 * rather whenever an application invokes the getdents(2) system call
6924 * on a directory already in our cache.
6925 */
6926 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6927 int plus)
6928 {
6929 uint32_t bitmap[3] = {0};
6930 uint32_t len;
6931 __be32 *p = xdr_inline_decode(xdr, 4);
6932 if (unlikely(!p))
6933 goto out_overflow;
6934 if (*p == xdr_zero) {
6935 p = xdr_inline_decode(xdr, 4);
6936 if (unlikely(!p))
6937 goto out_overflow;
6938 if (*p == xdr_zero)
6939 return -EAGAIN;
6940 entry->eof = 1;
6941 return -EBADCOOKIE;
6942 }
6943
6944 p = xdr_inline_decode(xdr, 12);
6945 if (unlikely(!p))
6946 goto out_overflow;
6947 entry->prev_cookie = entry->cookie;
6948 p = xdr_decode_hyper(p, &entry->cookie);
6949 entry->len = be32_to_cpup(p);
6950
6951 p = xdr_inline_decode(xdr, entry->len);
6952 if (unlikely(!p))
6953 goto out_overflow;
6954 entry->name = (const char *) p;
6955
6956 /*
6957 * In case the server doesn't return an inode number,
6958 * we fake one here. (We don't use inode number 0,
6959 * since glibc seems to choke on it...)
6960 */
6961 entry->ino = 1;
6962 entry->fattr->valid = 0;
6963
6964 if (decode_attr_bitmap(xdr, bitmap) < 0)
6965 goto out_overflow;
6966
6967 if (decode_attr_length(xdr, &len, &p) < 0)
6968 goto out_overflow;
6969
6970 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6971 entry->server) < 0)
6972 goto out_overflow;
6973 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6974 entry->ino = entry->fattr->mounted_on_fileid;
6975 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6976 entry->ino = entry->fattr->fileid;
6977
6978 entry->d_type = DT_UNKNOWN;
6979 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6980 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6981
6982 return 0;
6983
6984 out_overflow:
6985 print_overflow_msg(__func__, xdr);
6986 return -EAGAIN;
6987 }
6988
6989 /*
6990 * We need to translate between nfs status return values and
6991 * the local errno values which may not be the same.
6992 */
6993 static struct {
6994 int stat;
6995 int errno;
6996 } nfs_errtbl[] = {
6997 { NFS4_OK, 0 },
6998 { NFS4ERR_PERM, -EPERM },
6999 { NFS4ERR_NOENT, -ENOENT },
7000 { NFS4ERR_IO, -errno_NFSERR_IO},
7001 { NFS4ERR_NXIO, -ENXIO },
7002 { NFS4ERR_ACCESS, -EACCES },
7003 { NFS4ERR_EXIST, -EEXIST },
7004 { NFS4ERR_XDEV, -EXDEV },
7005 { NFS4ERR_NOTDIR, -ENOTDIR },
7006 { NFS4ERR_ISDIR, -EISDIR },
7007 { NFS4ERR_INVAL, -EINVAL },
7008 { NFS4ERR_FBIG, -EFBIG },
7009 { NFS4ERR_NOSPC, -ENOSPC },
7010 { NFS4ERR_ROFS, -EROFS },
7011 { NFS4ERR_MLINK, -EMLINK },
7012 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7013 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7014 { NFS4ERR_DQUOT, -EDQUOT },
7015 { NFS4ERR_STALE, -ESTALE },
7016 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7017 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7018 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7019 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7020 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7021 { NFS4ERR_BADTYPE, -EBADTYPE },
7022 { NFS4ERR_LOCKED, -EAGAIN },
7023 { NFS4ERR_SYMLINK, -ELOOP },
7024 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7025 { NFS4ERR_DEADLOCK, -EDEADLK },
7026 { -1, -EIO }
7027 };
7028
7029 /*
7030 * Convert an NFS error code to a local one.
7031 * This one is used jointly by NFSv2 and NFSv3.
7032 */
7033 static int
7034 nfs4_stat_to_errno(int stat)
7035 {
7036 int i;
7037 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7038 if (nfs_errtbl[i].stat == stat)
7039 return nfs_errtbl[i].errno;
7040 }
7041 if (stat <= 10000 || stat > 10100) {
7042 /* The server is looney tunes. */
7043 return -EREMOTEIO;
7044 }
7045 /* If we cannot translate the error, the recovery routines should
7046 * handle it.
7047 * Note: remaining NFSv4 error codes have values > 10000, so should
7048 * not conflict with native Linux error codes.
7049 */
7050 return -stat;
7051 }
7052
7053 #define PROC(proc, argtype, restype) \
7054 [NFSPROC4_CLNT_##proc] = { \
7055 .p_proc = NFSPROC4_COMPOUND, \
7056 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7057 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7058 .p_arglen = NFS4_##argtype##_sz, \
7059 .p_replen = NFS4_##restype##_sz, \
7060 .p_statidx = NFSPROC4_CLNT_##proc, \
7061 .p_name = #proc, \
7062 }
7063
7064 struct rpc_procinfo nfs4_procedures[] = {
7065 PROC(READ, enc_read, dec_read),
7066 PROC(WRITE, enc_write, dec_write),
7067 PROC(COMMIT, enc_commit, dec_commit),
7068 PROC(OPEN, enc_open, dec_open),
7069 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7070 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7071 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7072 PROC(CLOSE, enc_close, dec_close),
7073 PROC(SETATTR, enc_setattr, dec_setattr),
7074 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7075 PROC(RENEW, enc_renew, dec_renew),
7076 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7077 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7078 PROC(LOCK, enc_lock, dec_lock),
7079 PROC(LOCKT, enc_lockt, dec_lockt),
7080 PROC(LOCKU, enc_locku, dec_locku),
7081 PROC(ACCESS, enc_access, dec_access),
7082 PROC(GETATTR, enc_getattr, dec_getattr),
7083 PROC(LOOKUP, enc_lookup, dec_lookup),
7084 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7085 PROC(REMOVE, enc_remove, dec_remove),
7086 PROC(RENAME, enc_rename, dec_rename),
7087 PROC(LINK, enc_link, dec_link),
7088 PROC(SYMLINK, enc_symlink, dec_symlink),
7089 PROC(CREATE, enc_create, dec_create),
7090 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7091 PROC(STATFS, enc_statfs, dec_statfs),
7092 PROC(READLINK, enc_readlink, dec_readlink),
7093 PROC(READDIR, enc_readdir, dec_readdir),
7094 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7095 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7096 PROC(GETACL, enc_getacl, dec_getacl),
7097 PROC(SETACL, enc_setacl, dec_setacl),
7098 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7099 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7100 PROC(SECINFO, enc_secinfo, dec_secinfo),
7101 #if defined(CONFIG_NFS_V4_1)
7102 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7103 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7104 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7105 PROC(SEQUENCE, enc_sequence, dec_sequence),
7106 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7107 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7108 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7109 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7110 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7111 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7112 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7113 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7114 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7115 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7116 #endif /* CONFIG_NFS_V4_1 */
7117 };
7118
7119 struct rpc_version nfs_version4 = {
7120 .number = 4,
7121 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7122 .procs = nfs4_procedures
7123 };
7124
7125 /*
7126 * Local variables:
7127 * c-basic-offset: 8
7128 * End:
7129 */