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NFS: printks in fs/nfs/ should start with NFS:
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
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 xdr_set_scratch_buffer(xdr, page_address(args->acl_scratch), PAGE_SIZE);
2526
2527 encode_nops(&hdr);
2528 }
2529
2530 /*
2531 * Encode a WRITE request
2532 */
2533 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 struct nfs_writeargs *args)
2535 {
2536 struct compound_hdr hdr = {
2537 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538 };
2539
2540 encode_compound_hdr(xdr, req, &hdr);
2541 encode_sequence(xdr, &args->seq_args, &hdr);
2542 encode_putfh(xdr, args->fh, &hdr);
2543 encode_write(xdr, args, &hdr);
2544 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2545 if (args->bitmask)
2546 encode_getfattr(xdr, args->bitmask, &hdr);
2547 encode_nops(&hdr);
2548 }
2549
2550 /*
2551 * a COMMIT request
2552 */
2553 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2554 struct nfs_writeargs *args)
2555 {
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_commit(xdr, args, &hdr);
2564 if (args->bitmask)
2565 encode_getfattr(xdr, args->bitmask, &hdr);
2566 encode_nops(&hdr);
2567 }
2568
2569 /*
2570 * FSINFO request
2571 */
2572 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2573 struct nfs4_fsinfo_arg *args)
2574 {
2575 struct compound_hdr hdr = {
2576 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577 };
2578
2579 encode_compound_hdr(xdr, req, &hdr);
2580 encode_sequence(xdr, &args->seq_args, &hdr);
2581 encode_putfh(xdr, args->fh, &hdr);
2582 encode_fsinfo(xdr, args->bitmask, &hdr);
2583 encode_nops(&hdr);
2584 }
2585
2586 /*
2587 * a PATHCONF request
2588 */
2589 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2590 const struct nfs4_pathconf_arg *args)
2591 {
2592 struct compound_hdr hdr = {
2593 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594 };
2595
2596 encode_compound_hdr(xdr, req, &hdr);
2597 encode_sequence(xdr, &args->seq_args, &hdr);
2598 encode_putfh(xdr, args->fh, &hdr);
2599 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2600 &hdr);
2601 encode_nops(&hdr);
2602 }
2603
2604 /*
2605 * a STATFS request
2606 */
2607 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2608 const struct nfs4_statfs_arg *args)
2609 {
2610 struct compound_hdr hdr = {
2611 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612 };
2613
2614 encode_compound_hdr(xdr, req, &hdr);
2615 encode_sequence(xdr, &args->seq_args, &hdr);
2616 encode_putfh(xdr, args->fh, &hdr);
2617 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2618 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2619 encode_nops(&hdr);
2620 }
2621
2622 /*
2623 * GETATTR_BITMAP request
2624 */
2625 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2626 struct xdr_stream *xdr,
2627 struct nfs4_server_caps_arg *args)
2628 {
2629 struct compound_hdr hdr = {
2630 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631 };
2632
2633 encode_compound_hdr(xdr, req, &hdr);
2634 encode_sequence(xdr, &args->seq_args, &hdr);
2635 encode_putfh(xdr, args->fhandle, &hdr);
2636 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2637 FATTR4_WORD0_LINK_SUPPORT|
2638 FATTR4_WORD0_SYMLINK_SUPPORT|
2639 FATTR4_WORD0_ACLSUPPORT, &hdr);
2640 encode_nops(&hdr);
2641 }
2642
2643 /*
2644 * a RENEW request
2645 */
2646 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2647 struct nfs_client *clp)
2648 {
2649 struct compound_hdr hdr = {
2650 .nops = 0,
2651 };
2652
2653 encode_compound_hdr(xdr, req, &hdr);
2654 encode_renew(xdr, clp, &hdr);
2655 encode_nops(&hdr);
2656 }
2657
2658 /*
2659 * a SETCLIENTID request
2660 */
2661 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2662 struct xdr_stream *xdr,
2663 struct nfs4_setclientid *sc)
2664 {
2665 struct compound_hdr hdr = {
2666 .nops = 0,
2667 };
2668
2669 encode_compound_hdr(xdr, req, &hdr);
2670 encode_setclientid(xdr, sc, &hdr);
2671 encode_nops(&hdr);
2672 }
2673
2674 /*
2675 * a SETCLIENTID_CONFIRM request
2676 */
2677 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2678 struct xdr_stream *xdr,
2679 struct nfs4_setclientid_res *arg)
2680 {
2681 struct compound_hdr hdr = {
2682 .nops = 0,
2683 };
2684 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2685
2686 encode_compound_hdr(xdr, req, &hdr);
2687 encode_setclientid_confirm(xdr, arg, &hdr);
2688 encode_putrootfh(xdr, &hdr);
2689 encode_fsinfo(xdr, lease_bitmap, &hdr);
2690 encode_nops(&hdr);
2691 }
2692
2693 /*
2694 * DELEGRETURN request
2695 */
2696 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2697 struct xdr_stream *xdr,
2698 const struct nfs4_delegreturnargs *args)
2699 {
2700 struct compound_hdr hdr = {
2701 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702 };
2703
2704 encode_compound_hdr(xdr, req, &hdr);
2705 encode_sequence(xdr, &args->seq_args, &hdr);
2706 encode_putfh(xdr, args->fhandle, &hdr);
2707 encode_delegreturn(xdr, args->stateid, &hdr);
2708 encode_getfattr(xdr, args->bitmask, &hdr);
2709 encode_nops(&hdr);
2710 }
2711
2712 /*
2713 * Encode FS_LOCATIONS request
2714 */
2715 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2716 struct xdr_stream *xdr,
2717 struct nfs4_fs_locations_arg *args)
2718 {
2719 struct compound_hdr hdr = {
2720 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721 };
2722 uint32_t replen;
2723
2724 encode_compound_hdr(xdr, req, &hdr);
2725 encode_sequence(xdr, &args->seq_args, &hdr);
2726 encode_putfh(xdr, args->dir_fh, &hdr);
2727 encode_lookup(xdr, args->name, &hdr);
2728 replen = hdr.replen; /* get the attribute into args->page */
2729 encode_fs_locations(xdr, args->bitmask, &hdr);
2730
2731 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2732 0, PAGE_SIZE);
2733 encode_nops(&hdr);
2734 }
2735
2736 /*
2737 * Encode SECINFO request
2738 */
2739 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2740 struct xdr_stream *xdr,
2741 struct nfs4_secinfo_arg *args)
2742 {
2743 struct compound_hdr hdr = {
2744 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2745 };
2746
2747 encode_compound_hdr(xdr, req, &hdr);
2748 encode_sequence(xdr, &args->seq_args, &hdr);
2749 encode_putfh(xdr, args->dir_fh, &hdr);
2750 encode_secinfo(xdr, args->name, &hdr);
2751 encode_nops(&hdr);
2752 }
2753
2754 #if defined(CONFIG_NFS_V4_1)
2755 /*
2756 * EXCHANGE_ID request
2757 */
2758 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2759 struct xdr_stream *xdr,
2760 struct nfs41_exchange_id_args *args)
2761 {
2762 struct compound_hdr hdr = {
2763 .minorversion = args->client->cl_mvops->minor_version,
2764 };
2765
2766 encode_compound_hdr(xdr, req, &hdr);
2767 encode_exchange_id(xdr, args, &hdr);
2768 encode_nops(&hdr);
2769 }
2770
2771 /*
2772 * a CREATE_SESSION request
2773 */
2774 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2775 struct xdr_stream *xdr,
2776 struct nfs41_create_session_args *args)
2777 {
2778 struct compound_hdr hdr = {
2779 .minorversion = args->client->cl_mvops->minor_version,
2780 };
2781
2782 encode_compound_hdr(xdr, req, &hdr);
2783 encode_create_session(xdr, args, &hdr);
2784 encode_nops(&hdr);
2785 }
2786
2787 /*
2788 * a DESTROY_SESSION request
2789 */
2790 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2791 struct xdr_stream *xdr,
2792 struct nfs4_session *session)
2793 {
2794 struct compound_hdr hdr = {
2795 .minorversion = session->clp->cl_mvops->minor_version,
2796 };
2797
2798 encode_compound_hdr(xdr, req, &hdr);
2799 encode_destroy_session(xdr, session, &hdr);
2800 encode_nops(&hdr);
2801 }
2802
2803 /*
2804 * a SEQUENCE request
2805 */
2806 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2807 struct nfs4_sequence_args *args)
2808 {
2809 struct compound_hdr hdr = {
2810 .minorversion = nfs4_xdr_minorversion(args),
2811 };
2812
2813 encode_compound_hdr(xdr, req, &hdr);
2814 encode_sequence(xdr, args, &hdr);
2815 encode_nops(&hdr);
2816 }
2817
2818 /*
2819 * a GET_LEASE_TIME request
2820 */
2821 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 struct nfs4_get_lease_time_args *args)
2824 {
2825 struct compound_hdr hdr = {
2826 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2827 };
2828 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2829
2830 encode_compound_hdr(xdr, req, &hdr);
2831 encode_sequence(xdr, &args->la_seq_args, &hdr);
2832 encode_putrootfh(xdr, &hdr);
2833 encode_fsinfo(xdr, lease_bitmap, &hdr);
2834 encode_nops(&hdr);
2835 }
2836
2837 /*
2838 * a RECLAIM_COMPLETE request
2839 */
2840 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2841 struct xdr_stream *xdr,
2842 struct nfs41_reclaim_complete_args *args)
2843 {
2844 struct compound_hdr hdr = {
2845 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2846 };
2847
2848 encode_compound_hdr(xdr, req, &hdr);
2849 encode_sequence(xdr, &args->seq_args, &hdr);
2850 encode_reclaim_complete(xdr, args, &hdr);
2851 encode_nops(&hdr);
2852 }
2853
2854 /*
2855 * Encode GETDEVICELIST request
2856 */
2857 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2858 struct xdr_stream *xdr,
2859 struct nfs4_getdevicelist_args *args)
2860 {
2861 struct compound_hdr hdr = {
2862 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2863 };
2864
2865 encode_compound_hdr(xdr, req, &hdr);
2866 encode_sequence(xdr, &args->seq_args, &hdr);
2867 encode_putfh(xdr, args->fh, &hdr);
2868 encode_getdevicelist(xdr, args, &hdr);
2869 encode_nops(&hdr);
2870 }
2871
2872 /*
2873 * Encode GETDEVICEINFO request
2874 */
2875 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2876 struct xdr_stream *xdr,
2877 struct nfs4_getdeviceinfo_args *args)
2878 {
2879 struct compound_hdr hdr = {
2880 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2881 };
2882
2883 encode_compound_hdr(xdr, req, &hdr);
2884 encode_sequence(xdr, &args->seq_args, &hdr);
2885 encode_getdeviceinfo(xdr, args, &hdr);
2886
2887 /* set up reply kvec. Subtract notification bitmap max size (2)
2888 * so that notification bitmap is put in xdr_buf tail */
2889 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2890 args->pdev->pages, args->pdev->pgbase,
2891 args->pdev->pglen);
2892
2893 encode_nops(&hdr);
2894 }
2895
2896 /*
2897 * Encode LAYOUTGET request
2898 */
2899 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2900 struct xdr_stream *xdr,
2901 struct nfs4_layoutget_args *args)
2902 {
2903 struct compound_hdr hdr = {
2904 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2905 };
2906
2907 encode_compound_hdr(xdr, req, &hdr);
2908 encode_sequence(xdr, &args->seq_args, &hdr);
2909 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2910 encode_layoutget(xdr, args, &hdr);
2911
2912 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2913 args->layout.pages, 0, args->layout.pglen);
2914
2915 encode_nops(&hdr);
2916 }
2917
2918 /*
2919 * Encode LAYOUTCOMMIT request
2920 */
2921 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2922 struct xdr_stream *xdr,
2923 struct nfs4_layoutcommit_args *args)
2924 {
2925 struct nfs4_layoutcommit_data *data =
2926 container_of(args, struct nfs4_layoutcommit_data, args);
2927 struct compound_hdr hdr = {
2928 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2929 };
2930
2931 encode_compound_hdr(xdr, req, &hdr);
2932 encode_sequence(xdr, &args->seq_args, &hdr);
2933 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2934 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2935 encode_getfattr(xdr, args->bitmask, &hdr);
2936 encode_nops(&hdr);
2937 }
2938
2939 /*
2940 * Encode LAYOUTRETURN request
2941 */
2942 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2943 struct xdr_stream *xdr,
2944 struct nfs4_layoutreturn_args *args)
2945 {
2946 struct compound_hdr hdr = {
2947 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2948 };
2949
2950 encode_compound_hdr(xdr, req, &hdr);
2951 encode_sequence(xdr, &args->seq_args, &hdr);
2952 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2953 encode_layoutreturn(xdr, args, &hdr);
2954 encode_nops(&hdr);
2955 }
2956
2957 /*
2958 * Encode SECINFO_NO_NAME request
2959 */
2960 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2961 struct xdr_stream *xdr,
2962 struct nfs41_secinfo_no_name_args *args)
2963 {
2964 struct compound_hdr hdr = {
2965 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2966 };
2967
2968 encode_compound_hdr(xdr, req, &hdr);
2969 encode_sequence(xdr, &args->seq_args, &hdr);
2970 encode_putrootfh(xdr, &hdr);
2971 encode_secinfo_no_name(xdr, args, &hdr);
2972 encode_nops(&hdr);
2973 return 0;
2974 }
2975
2976 /*
2977 * Encode TEST_STATEID request
2978 */
2979 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2980 struct xdr_stream *xdr,
2981 struct nfs41_test_stateid_args *args)
2982 {
2983 struct compound_hdr hdr = {
2984 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2985 };
2986
2987 encode_compound_hdr(xdr, req, &hdr);
2988 encode_sequence(xdr, &args->seq_args, &hdr);
2989 encode_test_stateid(xdr, args, &hdr);
2990 encode_nops(&hdr);
2991 }
2992
2993 /*
2994 * Encode FREE_STATEID request
2995 */
2996 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2997 struct xdr_stream *xdr,
2998 struct nfs41_free_stateid_args *args)
2999 {
3000 struct compound_hdr hdr = {
3001 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3002 };
3003
3004 encode_compound_hdr(xdr, req, &hdr);
3005 encode_sequence(xdr, &args->seq_args, &hdr);
3006 encode_free_stateid(xdr, args, &hdr);
3007 encode_nops(&hdr);
3008 }
3009 #endif /* CONFIG_NFS_V4_1 */
3010
3011 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3012 {
3013 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3014 "Remaining buffer length is %tu words.\n",
3015 func, xdr->end - xdr->p);
3016 }
3017
3018 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3019 {
3020 __be32 *p;
3021
3022 p = xdr_inline_decode(xdr, 4);
3023 if (unlikely(!p))
3024 goto out_overflow;
3025 *len = be32_to_cpup(p);
3026 p = xdr_inline_decode(xdr, *len);
3027 if (unlikely(!p))
3028 goto out_overflow;
3029 *string = (char *)p;
3030 return 0;
3031 out_overflow:
3032 print_overflow_msg(__func__, xdr);
3033 return -EIO;
3034 }
3035
3036 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3037 {
3038 __be32 *p;
3039
3040 p = xdr_inline_decode(xdr, 8);
3041 if (unlikely(!p))
3042 goto out_overflow;
3043 hdr->status = be32_to_cpup(p++);
3044 hdr->taglen = be32_to_cpup(p);
3045
3046 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3047 if (unlikely(!p))
3048 goto out_overflow;
3049 hdr->tag = (char *)p;
3050 p += XDR_QUADLEN(hdr->taglen);
3051 hdr->nops = be32_to_cpup(p);
3052 if (unlikely(hdr->nops < 1))
3053 return nfs4_stat_to_errno(hdr->status);
3054 return 0;
3055 out_overflow:
3056 print_overflow_msg(__func__, xdr);
3057 return -EIO;
3058 }
3059
3060 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3061 {
3062 __be32 *p;
3063 uint32_t opnum;
3064 int32_t nfserr;
3065
3066 p = xdr_inline_decode(xdr, 8);
3067 if (unlikely(!p))
3068 goto out_overflow;
3069 opnum = be32_to_cpup(p++);
3070 if (opnum != expected) {
3071 dprintk("nfs: Server returned operation"
3072 " %d but we issued a request for %d\n",
3073 opnum, expected);
3074 return -EIO;
3075 }
3076 nfserr = be32_to_cpup(p);
3077 if (nfserr != NFS_OK)
3078 return nfs4_stat_to_errno(nfserr);
3079 return 0;
3080 out_overflow:
3081 print_overflow_msg(__func__, xdr);
3082 return -EIO;
3083 }
3084
3085 /* Dummy routine */
3086 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3087 {
3088 __be32 *p;
3089 unsigned int strlen;
3090 char *str;
3091
3092 p = xdr_inline_decode(xdr, 12);
3093 if (likely(p))
3094 return decode_opaque_inline(xdr, &strlen, &str);
3095 print_overflow_msg(__func__, xdr);
3096 return -EIO;
3097 }
3098
3099 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3100 {
3101 uint32_t bmlen;
3102 __be32 *p;
3103
3104 p = xdr_inline_decode(xdr, 4);
3105 if (unlikely(!p))
3106 goto out_overflow;
3107 bmlen = be32_to_cpup(p);
3108
3109 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3110 p = xdr_inline_decode(xdr, (bmlen << 2));
3111 if (unlikely(!p))
3112 goto out_overflow;
3113 if (bmlen > 0) {
3114 bitmap[0] = be32_to_cpup(p++);
3115 if (bmlen > 1) {
3116 bitmap[1] = be32_to_cpup(p++);
3117 if (bmlen > 2)
3118 bitmap[2] = be32_to_cpup(p);
3119 }
3120 }
3121 return 0;
3122 out_overflow:
3123 print_overflow_msg(__func__, xdr);
3124 return -EIO;
3125 }
3126
3127 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3128 {
3129 __be32 *p;
3130
3131 p = xdr_inline_decode(xdr, 4);
3132 if (unlikely(!p))
3133 goto out_overflow;
3134 *attrlen = be32_to_cpup(p);
3135 *savep = xdr->p;
3136 return 0;
3137 out_overflow:
3138 print_overflow_msg(__func__, xdr);
3139 return -EIO;
3140 }
3141
3142 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3143 {
3144 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3145 int ret;
3146 ret = decode_attr_bitmap(xdr, bitmask);
3147 if (unlikely(ret < 0))
3148 return ret;
3149 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3150 } else
3151 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3152 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3153 bitmask[0], bitmask[1], bitmask[2]);
3154 return 0;
3155 }
3156
3157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3158 {
3159 __be32 *p;
3160 int ret = 0;
3161
3162 *type = 0;
3163 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3164 return -EIO;
3165 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3166 p = xdr_inline_decode(xdr, 4);
3167 if (unlikely(!p))
3168 goto out_overflow;
3169 *type = be32_to_cpup(p);
3170 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3171 dprintk("%s: bad type %d\n", __func__, *type);
3172 return -EIO;
3173 }
3174 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3175 ret = NFS_ATTR_FATTR_TYPE;
3176 }
3177 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3178 return ret;
3179 out_overflow:
3180 print_overflow_msg(__func__, xdr);
3181 return -EIO;
3182 }
3183
3184 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3185 {
3186 __be32 *p;
3187 int ret = 0;
3188
3189 *change = 0;
3190 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3191 return -EIO;
3192 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3193 p = xdr_inline_decode(xdr, 8);
3194 if (unlikely(!p))
3195 goto out_overflow;
3196 xdr_decode_hyper(p, change);
3197 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3198 ret = NFS_ATTR_FATTR_CHANGE;
3199 }
3200 dprintk("%s: change attribute=%Lu\n", __func__,
3201 (unsigned long long)*change);
3202 return ret;
3203 out_overflow:
3204 print_overflow_msg(__func__, xdr);
3205 return -EIO;
3206 }
3207
3208 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3209 {
3210 __be32 *p;
3211 int ret = 0;
3212
3213 *size = 0;
3214 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3215 return -EIO;
3216 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3217 p = xdr_inline_decode(xdr, 8);
3218 if (unlikely(!p))
3219 goto out_overflow;
3220 xdr_decode_hyper(p, size);
3221 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3222 ret = NFS_ATTR_FATTR_SIZE;
3223 }
3224 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3225 return ret;
3226 out_overflow:
3227 print_overflow_msg(__func__, xdr);
3228 return -EIO;
3229 }
3230
3231 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3232 {
3233 __be32 *p;
3234
3235 *res = 0;
3236 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3237 return -EIO;
3238 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3239 p = xdr_inline_decode(xdr, 4);
3240 if (unlikely(!p))
3241 goto out_overflow;
3242 *res = be32_to_cpup(p);
3243 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3244 }
3245 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3246 return 0;
3247 out_overflow:
3248 print_overflow_msg(__func__, xdr);
3249 return -EIO;
3250 }
3251
3252 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3253 {
3254 __be32 *p;
3255
3256 *res = 0;
3257 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3258 return -EIO;
3259 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3260 p = xdr_inline_decode(xdr, 4);
3261 if (unlikely(!p))
3262 goto out_overflow;
3263 *res = be32_to_cpup(p);
3264 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3265 }
3266 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3267 return 0;
3268 out_overflow:
3269 print_overflow_msg(__func__, xdr);
3270 return -EIO;
3271 }
3272
3273 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3274 {
3275 __be32 *p;
3276 int ret = 0;
3277
3278 fsid->major = 0;
3279 fsid->minor = 0;
3280 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3281 return -EIO;
3282 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3283 p = xdr_inline_decode(xdr, 16);
3284 if (unlikely(!p))
3285 goto out_overflow;
3286 p = xdr_decode_hyper(p, &fsid->major);
3287 xdr_decode_hyper(p, &fsid->minor);
3288 bitmap[0] &= ~FATTR4_WORD0_FSID;
3289 ret = NFS_ATTR_FATTR_FSID;
3290 }
3291 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3292 (unsigned long long)fsid->major,
3293 (unsigned long long)fsid->minor);
3294 return ret;
3295 out_overflow:
3296 print_overflow_msg(__func__, xdr);
3297 return -EIO;
3298 }
3299
3300 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3301 {
3302 __be32 *p;
3303
3304 *res = 60;
3305 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3306 return -EIO;
3307 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3308 p = xdr_inline_decode(xdr, 4);
3309 if (unlikely(!p))
3310 goto out_overflow;
3311 *res = be32_to_cpup(p);
3312 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3313 }
3314 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3315 return 0;
3316 out_overflow:
3317 print_overflow_msg(__func__, xdr);
3318 return -EIO;
3319 }
3320
3321 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3322 {
3323 __be32 *p;
3324
3325 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3326 return -EIO;
3327 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3328 p = xdr_inline_decode(xdr, 4);
3329 if (unlikely(!p))
3330 goto out_overflow;
3331 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3332 *res = -be32_to_cpup(p);
3333 }
3334 return 0;
3335 out_overflow:
3336 print_overflow_msg(__func__, xdr);
3337 return -EIO;
3338 }
3339
3340 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3341 {
3342 __be32 *p;
3343 int len;
3344
3345 if (fh != NULL)
3346 memset(fh, 0, sizeof(*fh));
3347
3348 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3349 return -EIO;
3350 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3351 p = xdr_inline_decode(xdr, 4);
3352 if (unlikely(!p))
3353 goto out_overflow;
3354 len = be32_to_cpup(p);
3355 if (len > NFS4_FHSIZE)
3356 return -EIO;
3357 p = xdr_inline_decode(xdr, len);
3358 if (unlikely(!p))
3359 goto out_overflow;
3360 if (fh != NULL) {
3361 memcpy(fh->data, p, len);
3362 fh->size = len;
3363 }
3364 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3365 }
3366 return 0;
3367 out_overflow:
3368 print_overflow_msg(__func__, xdr);
3369 return -EIO;
3370 }
3371
3372 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3373 {
3374 __be32 *p;
3375
3376 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3377 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3378 return -EIO;
3379 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3380 p = xdr_inline_decode(xdr, 4);
3381 if (unlikely(!p))
3382 goto out_overflow;
3383 *res = be32_to_cpup(p);
3384 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3385 }
3386 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3387 return 0;
3388 out_overflow:
3389 print_overflow_msg(__func__, xdr);
3390 return -EIO;
3391 }
3392
3393 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3394 {
3395 __be32 *p;
3396 int ret = 0;
3397
3398 *fileid = 0;
3399 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3400 return -EIO;
3401 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3402 p = xdr_inline_decode(xdr, 8);
3403 if (unlikely(!p))
3404 goto out_overflow;
3405 xdr_decode_hyper(p, fileid);
3406 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3407 ret = NFS_ATTR_FATTR_FILEID;
3408 }
3409 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3410 return ret;
3411 out_overflow:
3412 print_overflow_msg(__func__, xdr);
3413 return -EIO;
3414 }
3415
3416 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3417 {
3418 __be32 *p;
3419 int ret = 0;
3420
3421 *fileid = 0;
3422 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3423 return -EIO;
3424 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3425 p = xdr_inline_decode(xdr, 8);
3426 if (unlikely(!p))
3427 goto out_overflow;
3428 xdr_decode_hyper(p, fileid);
3429 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3430 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3431 }
3432 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3433 return ret;
3434 out_overflow:
3435 print_overflow_msg(__func__, xdr);
3436 return -EIO;
3437 }
3438
3439 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3440 {
3441 __be32 *p;
3442 int status = 0;
3443
3444 *res = 0;
3445 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3448 p = xdr_inline_decode(xdr, 8);
3449 if (unlikely(!p))
3450 goto out_overflow;
3451 xdr_decode_hyper(p, res);
3452 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3453 }
3454 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3455 return status;
3456 out_overflow:
3457 print_overflow_msg(__func__, xdr);
3458 return -EIO;
3459 }
3460
3461 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3462 {
3463 __be32 *p;
3464 int status = 0;
3465
3466 *res = 0;
3467 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3468 return -EIO;
3469 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3470 p = xdr_inline_decode(xdr, 8);
3471 if (unlikely(!p))
3472 goto out_overflow;
3473 xdr_decode_hyper(p, res);
3474 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3475 }
3476 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3477 return status;
3478 out_overflow:
3479 print_overflow_msg(__func__, xdr);
3480 return -EIO;
3481 }
3482
3483 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3484 {
3485 __be32 *p;
3486 int status = 0;
3487
3488 *res = 0;
3489 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3490 return -EIO;
3491 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3492 p = xdr_inline_decode(xdr, 8);
3493 if (unlikely(!p))
3494 goto out_overflow;
3495 xdr_decode_hyper(p, res);
3496 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3497 }
3498 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3499 return status;
3500 out_overflow:
3501 print_overflow_msg(__func__, xdr);
3502 return -EIO;
3503 }
3504
3505 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3506 {
3507 u32 n;
3508 __be32 *p;
3509 int status = 0;
3510
3511 p = xdr_inline_decode(xdr, 4);
3512 if (unlikely(!p))
3513 goto out_overflow;
3514 n = be32_to_cpup(p);
3515 if (n == 0)
3516 goto root_path;
3517 dprintk("path ");
3518 path->ncomponents = 0;
3519 while (path->ncomponents < n) {
3520 struct nfs4_string *component = &path->components[path->ncomponents];
3521 status = decode_opaque_inline(xdr, &component->len, &component->data);
3522 if (unlikely(status != 0))
3523 goto out_eio;
3524 if (path->ncomponents != n)
3525 dprintk("/");
3526 dprintk("%s", component->data);
3527 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3528 path->ncomponents++;
3529 else {
3530 dprintk("cannot parse %d components in path\n", n);
3531 goto out_eio;
3532 }
3533 }
3534 out:
3535 dprintk("\n");
3536 return status;
3537 root_path:
3538 /* a root pathname is sent as a zero component4 */
3539 path->ncomponents = 1;
3540 path->components[0].len=0;
3541 path->components[0].data=NULL;
3542 dprintk("path /\n");
3543 goto out;
3544 out_eio:
3545 dprintk(" status %d", status);
3546 status = -EIO;
3547 goto out;
3548 out_overflow:
3549 print_overflow_msg(__func__, xdr);
3550 return -EIO;
3551 }
3552
3553 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3554 {
3555 int n;
3556 __be32 *p;
3557 int status = -EIO;
3558
3559 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3560 goto out;
3561 status = 0;
3562 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3563 goto out;
3564 status = -EIO;
3565 /* Ignore borken servers that return unrequested attrs */
3566 if (unlikely(res == NULL))
3567 goto out;
3568 dprintk("%s: fsroot ", __func__);
3569 status = decode_pathname(xdr, &res->fs_path);
3570 if (unlikely(status != 0))
3571 goto out;
3572 p = xdr_inline_decode(xdr, 4);
3573 if (unlikely(!p))
3574 goto out_overflow;
3575 n = be32_to_cpup(p);
3576 if (n <= 0)
3577 goto out_eio;
3578 res->nlocations = 0;
3579 while (res->nlocations < n) {
3580 u32 m;
3581 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3582
3583 p = xdr_inline_decode(xdr, 4);
3584 if (unlikely(!p))
3585 goto out_overflow;
3586 m = be32_to_cpup(p);
3587
3588 loc->nservers = 0;
3589 dprintk("%s: servers ", __func__);
3590 while (loc->nservers < m) {
3591 struct nfs4_string *server = &loc->servers[loc->nservers];
3592 status = decode_opaque_inline(xdr, &server->len, &server->data);
3593 if (unlikely(status != 0))
3594 goto out_eio;
3595 dprintk("%s ", server->data);
3596 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3597 loc->nservers++;
3598 else {
3599 unsigned int i;
3600 dprintk("%s: using first %u of %u servers "
3601 "returned for location %u\n",
3602 __func__,
3603 NFS4_FS_LOCATION_MAXSERVERS,
3604 m, res->nlocations);
3605 for (i = loc->nservers; i < m; i++) {
3606 unsigned int len;
3607 char *data;
3608 status = decode_opaque_inline(xdr, &len, &data);
3609 if (unlikely(status != 0))
3610 goto out_eio;
3611 }
3612 }
3613 }
3614 status = decode_pathname(xdr, &loc->rootpath);
3615 if (unlikely(status != 0))
3616 goto out_eio;
3617 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3618 res->nlocations++;
3619 }
3620 if (res->nlocations != 0)
3621 status = NFS_ATTR_FATTR_V4_REFERRAL;
3622 out:
3623 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3624 return status;
3625 out_overflow:
3626 print_overflow_msg(__func__, xdr);
3627 out_eio:
3628 status = -EIO;
3629 goto out;
3630 }
3631
3632 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3633 {
3634 __be32 *p;
3635 int status = 0;
3636
3637 *res = 0;
3638 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3639 return -EIO;
3640 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3641 p = xdr_inline_decode(xdr, 8);
3642 if (unlikely(!p))
3643 goto out_overflow;
3644 xdr_decode_hyper(p, res);
3645 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3646 }
3647 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3648 return status;
3649 out_overflow:
3650 print_overflow_msg(__func__, xdr);
3651 return -EIO;
3652 }
3653
3654 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3655 {
3656 __be32 *p;
3657 int status = 0;
3658
3659 *maxlink = 1;
3660 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3661 return -EIO;
3662 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3663 p = xdr_inline_decode(xdr, 4);
3664 if (unlikely(!p))
3665 goto out_overflow;
3666 *maxlink = be32_to_cpup(p);
3667 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3668 }
3669 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3670 return status;
3671 out_overflow:
3672 print_overflow_msg(__func__, xdr);
3673 return -EIO;
3674 }
3675
3676 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3677 {
3678 __be32 *p;
3679 int status = 0;
3680
3681 *maxname = 1024;
3682 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3683 return -EIO;
3684 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3685 p = xdr_inline_decode(xdr, 4);
3686 if (unlikely(!p))
3687 goto out_overflow;
3688 *maxname = be32_to_cpup(p);
3689 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3690 }
3691 dprintk("%s: maxname=%u\n", __func__, *maxname);
3692 return status;
3693 out_overflow:
3694 print_overflow_msg(__func__, xdr);
3695 return -EIO;
3696 }
3697
3698 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3699 {
3700 __be32 *p;
3701 int status = 0;
3702
3703 *res = 1024;
3704 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3705 return -EIO;
3706 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3707 uint64_t maxread;
3708 p = xdr_inline_decode(xdr, 8);
3709 if (unlikely(!p))
3710 goto out_overflow;
3711 xdr_decode_hyper(p, &maxread);
3712 if (maxread > 0x7FFFFFFF)
3713 maxread = 0x7FFFFFFF;
3714 *res = (uint32_t)maxread;
3715 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3716 }
3717 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3718 return status;
3719 out_overflow:
3720 print_overflow_msg(__func__, xdr);
3721 return -EIO;
3722 }
3723
3724 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3725 {
3726 __be32 *p;
3727 int status = 0;
3728
3729 *res = 1024;
3730 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3731 return -EIO;
3732 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3733 uint64_t maxwrite;
3734 p = xdr_inline_decode(xdr, 8);
3735 if (unlikely(!p))
3736 goto out_overflow;
3737 xdr_decode_hyper(p, &maxwrite);
3738 if (maxwrite > 0x7FFFFFFF)
3739 maxwrite = 0x7FFFFFFF;
3740 *res = (uint32_t)maxwrite;
3741 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3742 }
3743 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3744 return status;
3745 out_overflow:
3746 print_overflow_msg(__func__, xdr);
3747 return -EIO;
3748 }
3749
3750 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3751 {
3752 uint32_t tmp;
3753 __be32 *p;
3754 int ret = 0;
3755
3756 *mode = 0;
3757 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3758 return -EIO;
3759 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3760 p = xdr_inline_decode(xdr, 4);
3761 if (unlikely(!p))
3762 goto out_overflow;
3763 tmp = be32_to_cpup(p);
3764 *mode = tmp & ~S_IFMT;
3765 bitmap[1] &= ~FATTR4_WORD1_MODE;
3766 ret = NFS_ATTR_FATTR_MODE;
3767 }
3768 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3769 return ret;
3770 out_overflow:
3771 print_overflow_msg(__func__, xdr);
3772 return -EIO;
3773 }
3774
3775 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3776 {
3777 __be32 *p;
3778 int ret = 0;
3779
3780 *nlink = 1;
3781 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3782 return -EIO;
3783 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3784 p = xdr_inline_decode(xdr, 4);
3785 if (unlikely(!p))
3786 goto out_overflow;
3787 *nlink = be32_to_cpup(p);
3788 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3789 ret = NFS_ATTR_FATTR_NLINK;
3790 }
3791 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3792 return ret;
3793 out_overflow:
3794 print_overflow_msg(__func__, xdr);
3795 return -EIO;
3796 }
3797
3798 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3799 const struct nfs_server *server, uint32_t *uid,
3800 struct nfs4_string *owner_name)
3801 {
3802 uint32_t len;
3803 __be32 *p;
3804 int ret = 0;
3805
3806 *uid = -2;
3807 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3808 return -EIO;
3809 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3810 p = xdr_inline_decode(xdr, 4);
3811 if (unlikely(!p))
3812 goto out_overflow;
3813 len = be32_to_cpup(p);
3814 p = xdr_inline_decode(xdr, len);
3815 if (unlikely(!p))
3816 goto out_overflow;
3817 if (owner_name != NULL) {
3818 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3819 if (owner_name->data != NULL) {
3820 owner_name->len = len;
3821 ret = NFS_ATTR_FATTR_OWNER_NAME;
3822 }
3823 } else if (len < XDR_MAX_NETOBJ) {
3824 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3825 ret = NFS_ATTR_FATTR_OWNER;
3826 else
3827 dprintk("%s: nfs_map_name_to_uid failed!\n",
3828 __func__);
3829 } else
3830 dprintk("%s: name too long (%u)!\n",
3831 __func__, len);
3832 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3833 }
3834 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3835 return ret;
3836 out_overflow:
3837 print_overflow_msg(__func__, xdr);
3838 return -EIO;
3839 }
3840
3841 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3842 const struct nfs_server *server, uint32_t *gid,
3843 struct nfs4_string *group_name)
3844 {
3845 uint32_t len;
3846 __be32 *p;
3847 int ret = 0;
3848
3849 *gid = -2;
3850 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3851 return -EIO;
3852 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3853 p = xdr_inline_decode(xdr, 4);
3854 if (unlikely(!p))
3855 goto out_overflow;
3856 len = be32_to_cpup(p);
3857 p = xdr_inline_decode(xdr, len);
3858 if (unlikely(!p))
3859 goto out_overflow;
3860 if (group_name != NULL) {
3861 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3862 if (group_name->data != NULL) {
3863 group_name->len = len;
3864 ret = NFS_ATTR_FATTR_GROUP_NAME;
3865 }
3866 } else if (len < XDR_MAX_NETOBJ) {
3867 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3868 ret = NFS_ATTR_FATTR_GROUP;
3869 else
3870 dprintk("%s: nfs_map_group_to_gid failed!\n",
3871 __func__);
3872 } else
3873 dprintk("%s: name too long (%u)!\n",
3874 __func__, len);
3875 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3876 }
3877 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3878 return ret;
3879 out_overflow:
3880 print_overflow_msg(__func__, xdr);
3881 return -EIO;
3882 }
3883
3884 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3885 {
3886 uint32_t major = 0, minor = 0;
3887 __be32 *p;
3888 int ret = 0;
3889
3890 *rdev = MKDEV(0,0);
3891 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3892 return -EIO;
3893 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3894 dev_t tmp;
3895
3896 p = xdr_inline_decode(xdr, 8);
3897 if (unlikely(!p))
3898 goto out_overflow;
3899 major = be32_to_cpup(p++);
3900 minor = be32_to_cpup(p);
3901 tmp = MKDEV(major, minor);
3902 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3903 *rdev = tmp;
3904 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3905 ret = NFS_ATTR_FATTR_RDEV;
3906 }
3907 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3908 return ret;
3909 out_overflow:
3910 print_overflow_msg(__func__, xdr);
3911 return -EIO;
3912 }
3913
3914 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3915 {
3916 __be32 *p;
3917 int status = 0;
3918
3919 *res = 0;
3920 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3921 return -EIO;
3922 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3923 p = xdr_inline_decode(xdr, 8);
3924 if (unlikely(!p))
3925 goto out_overflow;
3926 xdr_decode_hyper(p, res);
3927 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3928 }
3929 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3930 return status;
3931 out_overflow:
3932 print_overflow_msg(__func__, xdr);
3933 return -EIO;
3934 }
3935
3936 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3937 {
3938 __be32 *p;
3939 int status = 0;
3940
3941 *res = 0;
3942 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3943 return -EIO;
3944 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3945 p = xdr_inline_decode(xdr, 8);
3946 if (unlikely(!p))
3947 goto out_overflow;
3948 xdr_decode_hyper(p, res);
3949 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3950 }
3951 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3952 return status;
3953 out_overflow:
3954 print_overflow_msg(__func__, xdr);
3955 return -EIO;
3956 }
3957
3958 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3959 {
3960 __be32 *p;
3961 int status = 0;
3962
3963 *res = 0;
3964 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3965 return -EIO;
3966 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3967 p = xdr_inline_decode(xdr, 8);
3968 if (unlikely(!p))
3969 goto out_overflow;
3970 xdr_decode_hyper(p, res);
3971 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3972 }
3973 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3974 return status;
3975 out_overflow:
3976 print_overflow_msg(__func__, xdr);
3977 return -EIO;
3978 }
3979
3980 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3981 {
3982 __be32 *p;
3983 int ret = 0;
3984
3985 *used = 0;
3986 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3987 return -EIO;
3988 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3989 p = xdr_inline_decode(xdr, 8);
3990 if (unlikely(!p))
3991 goto out_overflow;
3992 xdr_decode_hyper(p, used);
3993 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3994 ret = NFS_ATTR_FATTR_SPACE_USED;
3995 }
3996 dprintk("%s: space used=%Lu\n", __func__,
3997 (unsigned long long)*used);
3998 return ret;
3999 out_overflow:
4000 print_overflow_msg(__func__, xdr);
4001 return -EIO;
4002 }
4003
4004 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4005 {
4006 __be32 *p;
4007 uint64_t sec;
4008 uint32_t nsec;
4009
4010 p = xdr_inline_decode(xdr, 12);
4011 if (unlikely(!p))
4012 goto out_overflow;
4013 p = xdr_decode_hyper(p, &sec);
4014 nsec = be32_to_cpup(p);
4015 time->tv_sec = (time_t)sec;
4016 time->tv_nsec = (long)nsec;
4017 return 0;
4018 out_overflow:
4019 print_overflow_msg(__func__, xdr);
4020 return -EIO;
4021 }
4022
4023 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4024 {
4025 int status = 0;
4026
4027 time->tv_sec = 0;
4028 time->tv_nsec = 0;
4029 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4030 return -EIO;
4031 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4032 status = decode_attr_time(xdr, time);
4033 if (status == 0)
4034 status = NFS_ATTR_FATTR_ATIME;
4035 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4036 }
4037 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4038 return status;
4039 }
4040
4041 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4042 {
4043 int status = 0;
4044
4045 time->tv_sec = 0;
4046 time->tv_nsec = 0;
4047 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4048 return -EIO;
4049 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4050 status = decode_attr_time(xdr, time);
4051 if (status == 0)
4052 status = NFS_ATTR_FATTR_CTIME;
4053 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4054 }
4055 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4056 return status;
4057 }
4058
4059 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4060 struct timespec *time)
4061 {
4062 int status = 0;
4063
4064 time->tv_sec = 0;
4065 time->tv_nsec = 0;
4066 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4067 return -EIO;
4068 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4069 status = decode_attr_time(xdr, time);
4070 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4071 }
4072 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4073 (long)time->tv_nsec);
4074 return status;
4075 }
4076
4077 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4078 {
4079 int status = 0;
4080
4081 time->tv_sec = 0;
4082 time->tv_nsec = 0;
4083 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4084 return -EIO;
4085 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4086 status = decode_attr_time(xdr, time);
4087 if (status == 0)
4088 status = NFS_ATTR_FATTR_MTIME;
4089 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4090 }
4091 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4092 return status;
4093 }
4094
4095 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4096 {
4097 unsigned int attrwords = XDR_QUADLEN(attrlen);
4098 unsigned int nwords = xdr->p - savep;
4099
4100 if (unlikely(attrwords != nwords)) {
4101 dprintk("%s: server returned incorrect attribute length: "
4102 "%u %c %u\n",
4103 __func__,
4104 attrwords << 2,
4105 (attrwords < nwords) ? '<' : '>',
4106 nwords << 2);
4107 return -EIO;
4108 }
4109 return 0;
4110 }
4111
4112 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4113 {
4114 __be32 *p;
4115
4116 p = xdr_inline_decode(xdr, 20);
4117 if (unlikely(!p))
4118 goto out_overflow;
4119 cinfo->atomic = be32_to_cpup(p++);
4120 p = xdr_decode_hyper(p, &cinfo->before);
4121 xdr_decode_hyper(p, &cinfo->after);
4122 return 0;
4123 out_overflow:
4124 print_overflow_msg(__func__, xdr);
4125 return -EIO;
4126 }
4127
4128 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4129 {
4130 __be32 *p;
4131 uint32_t supp, acc;
4132 int status;
4133
4134 status = decode_op_hdr(xdr, OP_ACCESS);
4135 if (status)
4136 return status;
4137 p = xdr_inline_decode(xdr, 8);
4138 if (unlikely(!p))
4139 goto out_overflow;
4140 supp = be32_to_cpup(p++);
4141 acc = be32_to_cpup(p);
4142 access->supported = supp;
4143 access->access = acc;
4144 return 0;
4145 out_overflow:
4146 print_overflow_msg(__func__, xdr);
4147 return -EIO;
4148 }
4149
4150 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4151 {
4152 __be32 *p;
4153
4154 p = xdr_inline_decode(xdr, len);
4155 if (likely(p)) {
4156 memcpy(buf, p, len);
4157 return 0;
4158 }
4159 print_overflow_msg(__func__, xdr);
4160 return -EIO;
4161 }
4162
4163 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4164 {
4165 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
4166 }
4167
4168 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4169 {
4170 int status;
4171
4172 status = decode_op_hdr(xdr, OP_CLOSE);
4173 if (status != -EIO)
4174 nfs_increment_open_seqid(status, res->seqid);
4175 if (!status)
4176 status = decode_stateid(xdr, &res->stateid);
4177 return status;
4178 }
4179
4180 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4181 {
4182 return decode_opaque_fixed(xdr, verifier, 8);
4183 }
4184
4185 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4186 {
4187 int status;
4188
4189 status = decode_op_hdr(xdr, OP_COMMIT);
4190 if (!status)
4191 status = decode_verifier(xdr, res->verf->verifier);
4192 return status;
4193 }
4194
4195 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4196 {
4197 __be32 *p;
4198 uint32_t bmlen;
4199 int status;
4200
4201 status = decode_op_hdr(xdr, OP_CREATE);
4202 if (status)
4203 return status;
4204 if ((status = decode_change_info(xdr, cinfo)))
4205 return status;
4206 p = xdr_inline_decode(xdr, 4);
4207 if (unlikely(!p))
4208 goto out_overflow;
4209 bmlen = be32_to_cpup(p);
4210 p = xdr_inline_decode(xdr, bmlen << 2);
4211 if (likely(p))
4212 return 0;
4213 out_overflow:
4214 print_overflow_msg(__func__, xdr);
4215 return -EIO;
4216 }
4217
4218 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4219 {
4220 __be32 *savep;
4221 uint32_t attrlen, bitmap[3] = {0};
4222 int status;
4223
4224 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4225 goto xdr_error;
4226 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4227 goto xdr_error;
4228 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4229 goto xdr_error;
4230 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4231 goto xdr_error;
4232 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4233 goto xdr_error;
4234 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4235 goto xdr_error;
4236 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4237 goto xdr_error;
4238 status = verify_attr_len(xdr, savep, attrlen);
4239 xdr_error:
4240 dprintk("%s: xdr returned %d!\n", __func__, -status);
4241 return status;
4242 }
4243
4244 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4245 {
4246 __be32 *savep;
4247 uint32_t attrlen, bitmap[3] = {0};
4248 int status;
4249
4250 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4251 goto xdr_error;
4252 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4253 goto xdr_error;
4254 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4255 goto xdr_error;
4256
4257 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4258 goto xdr_error;
4259 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4260 goto xdr_error;
4261 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4262 goto xdr_error;
4263 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4264 goto xdr_error;
4265 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4266 goto xdr_error;
4267 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4268 goto xdr_error;
4269
4270 status = verify_attr_len(xdr, savep, attrlen);
4271 xdr_error:
4272 dprintk("%s: xdr returned %d!\n", __func__, -status);
4273 return status;
4274 }
4275
4276 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4277 {
4278 __be32 *savep;
4279 uint32_t attrlen, bitmap[3] = {0};
4280 int status;
4281
4282 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4283 goto xdr_error;
4284 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4285 goto xdr_error;
4286 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4287 goto xdr_error;
4288
4289 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4290 goto xdr_error;
4291 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4292 goto xdr_error;
4293
4294 status = verify_attr_len(xdr, savep, attrlen);
4295 xdr_error:
4296 dprintk("%s: xdr returned %d!\n", __func__, -status);
4297 return status;
4298 }
4299
4300 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4301 struct nfs_fattr *fattr, struct nfs_fh *fh,
4302 struct nfs4_fs_locations *fs_loc,
4303 const struct nfs_server *server)
4304 {
4305 int status;
4306 umode_t fmode = 0;
4307 uint32_t type;
4308 int32_t err;
4309
4310 status = decode_attr_type(xdr, bitmap, &type);
4311 if (status < 0)
4312 goto xdr_error;
4313 fattr->mode = 0;
4314 if (status != 0) {
4315 fattr->mode |= nfs_type2fmt[type];
4316 fattr->valid |= status;
4317 }
4318
4319 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4320 if (status < 0)
4321 goto xdr_error;
4322 fattr->valid |= status;
4323
4324 status = decode_attr_size(xdr, bitmap, &fattr->size);
4325 if (status < 0)
4326 goto xdr_error;
4327 fattr->valid |= status;
4328
4329 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4330 if (status < 0)
4331 goto xdr_error;
4332 fattr->valid |= status;
4333
4334 err = 0;
4335 status = decode_attr_error(xdr, bitmap, &err);
4336 if (status < 0)
4337 goto xdr_error;
4338 if (err == -NFS4ERR_WRONGSEC)
4339 nfs_fixup_secinfo_attributes(fattr, fh);
4340
4341 status = decode_attr_filehandle(xdr, bitmap, fh);
4342 if (status < 0)
4343 goto xdr_error;
4344
4345 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4346 if (status < 0)
4347 goto xdr_error;
4348 fattr->valid |= status;
4349
4350 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4351 if (status < 0)
4352 goto xdr_error;
4353 fattr->valid |= status;
4354
4355 status = decode_attr_mode(xdr, bitmap, &fmode);
4356 if (status < 0)
4357 goto xdr_error;
4358 if (status != 0) {
4359 fattr->mode |= fmode;
4360 fattr->valid |= status;
4361 }
4362
4363 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4364 if (status < 0)
4365 goto xdr_error;
4366 fattr->valid |= status;
4367
4368 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4369 if (status < 0)
4370 goto xdr_error;
4371 fattr->valid |= status;
4372
4373 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4374 if (status < 0)
4375 goto xdr_error;
4376 fattr->valid |= status;
4377
4378 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4379 if (status < 0)
4380 goto xdr_error;
4381 fattr->valid |= status;
4382
4383 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4384 if (status < 0)
4385 goto xdr_error;
4386 fattr->valid |= status;
4387
4388 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4389 if (status < 0)
4390 goto xdr_error;
4391 fattr->valid |= status;
4392
4393 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4394 if (status < 0)
4395 goto xdr_error;
4396 fattr->valid |= status;
4397
4398 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4399 if (status < 0)
4400 goto xdr_error;
4401 fattr->valid |= status;
4402
4403 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4404 if (status < 0)
4405 goto xdr_error;
4406 fattr->valid |= status;
4407
4408 xdr_error:
4409 dprintk("%s: xdr returned %d\n", __func__, -status);
4410 return status;
4411 }
4412
4413 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4414 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4415 const struct nfs_server *server)
4416 {
4417 __be32 *savep;
4418 uint32_t attrlen,
4419 bitmap[3] = {0};
4420 int status;
4421
4422 status = decode_op_hdr(xdr, OP_GETATTR);
4423 if (status < 0)
4424 goto xdr_error;
4425
4426 status = decode_attr_bitmap(xdr, bitmap);
4427 if (status < 0)
4428 goto xdr_error;
4429
4430 status = decode_attr_length(xdr, &attrlen, &savep);
4431 if (status < 0)
4432 goto xdr_error;
4433
4434 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4435 if (status < 0)
4436 goto xdr_error;
4437
4438 status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440 dprintk("%s: xdr returned %d\n", __func__, -status);
4441 return status;
4442 }
4443
4444 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4445 const struct nfs_server *server)
4446 {
4447 return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4448 }
4449
4450 /*
4451 * Decode potentially multiple layout types. Currently we only support
4452 * one layout driver per file system.
4453 */
4454 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4455 uint32_t *layouttype)
4456 {
4457 uint32_t *p;
4458 int num;
4459
4460 p = xdr_inline_decode(xdr, 4);
4461 if (unlikely(!p))
4462 goto out_overflow;
4463 num = be32_to_cpup(p);
4464
4465 /* pNFS is not supported by the underlying file system */
4466 if (num == 0) {
4467 *layouttype = 0;
4468 return 0;
4469 }
4470 if (num > 1)
4471 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4472 "per filesystem not supported\n", __func__);
4473
4474 /* Decode and set first layout type, move xdr->p past unused types */
4475 p = xdr_inline_decode(xdr, num * 4);
4476 if (unlikely(!p))
4477 goto out_overflow;
4478 *layouttype = be32_to_cpup(p);
4479 return 0;
4480 out_overflow:
4481 print_overflow_msg(__func__, xdr);
4482 return -EIO;
4483 }
4484
4485 /*
4486 * The type of file system exported.
4487 * Note we must ensure that layouttype is set in any non-error case.
4488 */
4489 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4490 uint32_t *layouttype)
4491 {
4492 int status = 0;
4493
4494 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4495 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4496 return -EIO;
4497 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4498 status = decode_first_pnfs_layout_type(xdr, layouttype);
4499 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4500 } else
4501 *layouttype = 0;
4502 return status;
4503 }
4504
4505 /*
4506 * The prefered block size for layout directed io
4507 */
4508 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4509 uint32_t *res)
4510 {
4511 __be32 *p;
4512
4513 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4514 *res = 0;
4515 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4516 p = xdr_inline_decode(xdr, 4);
4517 if (unlikely(!p)) {
4518 print_overflow_msg(__func__, xdr);
4519 return -EIO;
4520 }
4521 *res = be32_to_cpup(p);
4522 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4523 }
4524 return 0;
4525 }
4526
4527 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4528 {
4529 __be32 *savep;
4530 uint32_t attrlen, bitmap[3];
4531 int status;
4532
4533 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4534 goto xdr_error;
4535 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4536 goto xdr_error;
4537 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4538 goto xdr_error;
4539
4540 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4541
4542 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4543 goto xdr_error;
4544 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4545 goto xdr_error;
4546 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4547 goto xdr_error;
4548 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4549 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4550 goto xdr_error;
4551 fsinfo->wtpref = fsinfo->wtmax;
4552 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4553 if (status != 0)
4554 goto xdr_error;
4555 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4556 if (status != 0)
4557 goto xdr_error;
4558 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4559 if (status)
4560 goto xdr_error;
4561
4562 status = verify_attr_len(xdr, savep, attrlen);
4563 xdr_error:
4564 dprintk("%s: xdr returned %d!\n", __func__, -status);
4565 return status;
4566 }
4567
4568 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4569 {
4570 __be32 *p;
4571 uint32_t len;
4572 int status;
4573
4574 /* Zero handle first to allow comparisons */
4575 memset(fh, 0, sizeof(*fh));
4576
4577 status = decode_op_hdr(xdr, OP_GETFH);
4578 if (status)
4579 return status;
4580
4581 p = xdr_inline_decode(xdr, 4);
4582 if (unlikely(!p))
4583 goto out_overflow;
4584 len = be32_to_cpup(p);
4585 if (len > NFS4_FHSIZE)
4586 return -EIO;
4587 fh->size = len;
4588 p = xdr_inline_decode(xdr, len);
4589 if (unlikely(!p))
4590 goto out_overflow;
4591 memcpy(fh->data, p, len);
4592 return 0;
4593 out_overflow:
4594 print_overflow_msg(__func__, xdr);
4595 return -EIO;
4596 }
4597
4598 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4599 {
4600 int status;
4601
4602 status = decode_op_hdr(xdr, OP_LINK);
4603 if (status)
4604 return status;
4605 return decode_change_info(xdr, cinfo);
4606 }
4607
4608 /*
4609 * We create the owner, so we know a proper owner.id length is 4.
4610 */
4611 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4612 {
4613 uint64_t offset, length, clientid;
4614 __be32 *p;
4615 uint32_t namelen, type;
4616
4617 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4618 if (unlikely(!p))
4619 goto out_overflow;
4620 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4621 p = xdr_decode_hyper(p, &length);
4622 type = be32_to_cpup(p++); /* 4 byte read */
4623 if (fl != NULL) { /* manipulate file lock */
4624 fl->fl_start = (loff_t)offset;
4625 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4626 if (length == ~(uint64_t)0)
4627 fl->fl_end = OFFSET_MAX;
4628 fl->fl_type = F_WRLCK;
4629 if (type & 1)
4630 fl->fl_type = F_RDLCK;
4631 fl->fl_pid = 0;
4632 }
4633 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4634 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4635 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4636 if (likely(p))
4637 return -NFS4ERR_DENIED;
4638 out_overflow:
4639 print_overflow_msg(__func__, xdr);
4640 return -EIO;
4641 }
4642
4643 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4644 {
4645 int status;
4646
4647 status = decode_op_hdr(xdr, OP_LOCK);
4648 if (status == -EIO)
4649 goto out;
4650 if (status == 0) {
4651 status = decode_stateid(xdr, &res->stateid);
4652 if (unlikely(status))
4653 goto out;
4654 } else if (status == -NFS4ERR_DENIED)
4655 status = decode_lock_denied(xdr, NULL);
4656 if (res->open_seqid != NULL)
4657 nfs_increment_open_seqid(status, res->open_seqid);
4658 nfs_increment_lock_seqid(status, res->lock_seqid);
4659 out:
4660 return status;
4661 }
4662
4663 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4664 {
4665 int status;
4666 status = decode_op_hdr(xdr, OP_LOCKT);
4667 if (status == -NFS4ERR_DENIED)
4668 return decode_lock_denied(xdr, res->denied);
4669 return status;
4670 }
4671
4672 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4673 {
4674 int status;
4675
4676 status = decode_op_hdr(xdr, OP_LOCKU);
4677 if (status != -EIO)
4678 nfs_increment_lock_seqid(status, res->seqid);
4679 if (status == 0)
4680 status = decode_stateid(xdr, &res->stateid);
4681 return status;
4682 }
4683
4684 static int decode_release_lockowner(struct xdr_stream *xdr)
4685 {
4686 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4687 }
4688
4689 static int decode_lookup(struct xdr_stream *xdr)
4690 {
4691 return decode_op_hdr(xdr, OP_LOOKUP);
4692 }
4693
4694 /* This is too sick! */
4695 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4696 {
4697 __be32 *p;
4698 uint32_t limit_type, nblocks, blocksize;
4699
4700 p = xdr_inline_decode(xdr, 12);
4701 if (unlikely(!p))
4702 goto out_overflow;
4703 limit_type = be32_to_cpup(p++);
4704 switch (limit_type) {
4705 case 1:
4706 xdr_decode_hyper(p, maxsize);
4707 break;
4708 case 2:
4709 nblocks = be32_to_cpup(p++);
4710 blocksize = be32_to_cpup(p);
4711 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4712 }
4713 return 0;
4714 out_overflow:
4715 print_overflow_msg(__func__, xdr);
4716 return -EIO;
4717 }
4718
4719 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4720 {
4721 __be32 *p;
4722 uint32_t delegation_type;
4723 int status;
4724
4725 p = xdr_inline_decode(xdr, 4);
4726 if (unlikely(!p))
4727 goto out_overflow;
4728 delegation_type = be32_to_cpup(p);
4729 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4730 res->delegation_type = 0;
4731 return 0;
4732 }
4733 status = decode_stateid(xdr, &res->delegation);
4734 if (unlikely(status))
4735 return status;
4736 p = xdr_inline_decode(xdr, 4);
4737 if (unlikely(!p))
4738 goto out_overflow;
4739 res->do_recall = be32_to_cpup(p);
4740
4741 switch (delegation_type) {
4742 case NFS4_OPEN_DELEGATE_READ:
4743 res->delegation_type = FMODE_READ;
4744 break;
4745 case NFS4_OPEN_DELEGATE_WRITE:
4746 res->delegation_type = FMODE_WRITE|FMODE_READ;
4747 if (decode_space_limit(xdr, &res->maxsize) < 0)
4748 return -EIO;
4749 }
4750 return decode_ace(xdr, NULL, res->server->nfs_client);
4751 out_overflow:
4752 print_overflow_msg(__func__, xdr);
4753 return -EIO;
4754 }
4755
4756 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4757 {
4758 __be32 *p;
4759 uint32_t savewords, bmlen, i;
4760 int status;
4761
4762 status = decode_op_hdr(xdr, OP_OPEN);
4763 if (status != -EIO)
4764 nfs_increment_open_seqid(status, res->seqid);
4765 if (!status)
4766 status = decode_stateid(xdr, &res->stateid);
4767 if (unlikely(status))
4768 return status;
4769
4770 decode_change_info(xdr, &res->cinfo);
4771
4772 p = xdr_inline_decode(xdr, 8);
4773 if (unlikely(!p))
4774 goto out_overflow;
4775 res->rflags = be32_to_cpup(p++);
4776 bmlen = be32_to_cpup(p);
4777 if (bmlen > 10)
4778 goto xdr_error;
4779
4780 p = xdr_inline_decode(xdr, bmlen << 2);
4781 if (unlikely(!p))
4782 goto out_overflow;
4783 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4784 for (i = 0; i < savewords; ++i)
4785 res->attrset[i] = be32_to_cpup(p++);
4786 for (; i < NFS4_BITMAP_SIZE; i++)
4787 res->attrset[i] = 0;
4788
4789 return decode_delegation(xdr, res);
4790 xdr_error:
4791 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4792 return -EIO;
4793 out_overflow:
4794 print_overflow_msg(__func__, xdr);
4795 return -EIO;
4796 }
4797
4798 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4799 {
4800 int status;
4801
4802 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4803 if (status != -EIO)
4804 nfs_increment_open_seqid(status, res->seqid);
4805 if (!status)
4806 status = decode_stateid(xdr, &res->stateid);
4807 return status;
4808 }
4809
4810 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4811 {
4812 int status;
4813
4814 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4815 if (status != -EIO)
4816 nfs_increment_open_seqid(status, res->seqid);
4817 if (!status)
4818 status = decode_stateid(xdr, &res->stateid);
4819 return status;
4820 }
4821
4822 static int decode_putfh(struct xdr_stream *xdr)
4823 {
4824 return decode_op_hdr(xdr, OP_PUTFH);
4825 }
4826
4827 static int decode_putrootfh(struct xdr_stream *xdr)
4828 {
4829 return decode_op_hdr(xdr, OP_PUTROOTFH);
4830 }
4831
4832 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4833 {
4834 struct kvec *iov = req->rq_rcv_buf.head;
4835 __be32 *p;
4836 uint32_t count, eof, recvd, hdrlen;
4837 int status;
4838
4839 status = decode_op_hdr(xdr, OP_READ);
4840 if (status)
4841 return status;
4842 p = xdr_inline_decode(xdr, 8);
4843 if (unlikely(!p))
4844 goto out_overflow;
4845 eof = be32_to_cpup(p++);
4846 count = be32_to_cpup(p);
4847 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4848 recvd = req->rq_rcv_buf.len - hdrlen;
4849 if (count > recvd) {
4850 dprintk("NFS: server cheating in read reply: "
4851 "count %u > recvd %u\n", count, recvd);
4852 count = recvd;
4853 eof = 0;
4854 }
4855 xdr_read_pages(xdr, count);
4856 res->eof = eof;
4857 res->count = count;
4858 return 0;
4859 out_overflow:
4860 print_overflow_msg(__func__, xdr);
4861 return -EIO;
4862 }
4863
4864 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4865 {
4866 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4867 struct kvec *iov = rcvbuf->head;
4868 size_t hdrlen;
4869 u32 recvd, pglen = rcvbuf->page_len;
4870 int status;
4871
4872 status = decode_op_hdr(xdr, OP_READDIR);
4873 if (!status)
4874 status = decode_verifier(xdr, readdir->verifier.data);
4875 if (unlikely(status))
4876 return status;
4877 dprintk("%s: verifier = %08x:%08x\n",
4878 __func__,
4879 ((u32 *)readdir->verifier.data)[0],
4880 ((u32 *)readdir->verifier.data)[1]);
4881
4882
4883 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4884 recvd = rcvbuf->len - hdrlen;
4885 if (pglen > recvd)
4886 pglen = recvd;
4887 xdr_read_pages(xdr, pglen);
4888
4889
4890 return pglen;
4891 }
4892
4893 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4894 {
4895 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4896 struct kvec *iov = rcvbuf->head;
4897 size_t hdrlen;
4898 u32 len, recvd;
4899 __be32 *p;
4900 int status;
4901
4902 status = decode_op_hdr(xdr, OP_READLINK);
4903 if (status)
4904 return status;
4905
4906 /* Convert length of symlink */
4907 p = xdr_inline_decode(xdr, 4);
4908 if (unlikely(!p))
4909 goto out_overflow;
4910 len = be32_to_cpup(p);
4911 if (len >= rcvbuf->page_len || len <= 0) {
4912 dprintk("nfs: server returned giant symlink!\n");
4913 return -ENAMETOOLONG;
4914 }
4915 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4916 recvd = req->rq_rcv_buf.len - hdrlen;
4917 if (recvd < len) {
4918 dprintk("NFS: server cheating in readlink reply: "
4919 "count %u > recvd %u\n", len, recvd);
4920 return -EIO;
4921 }
4922 xdr_read_pages(xdr, len);
4923 /*
4924 * The XDR encode routine has set things up so that
4925 * the link text will be copied directly into the
4926 * buffer. We just have to do overflow-checking,
4927 * and and null-terminate the text (the VFS expects
4928 * null-termination).
4929 */
4930 xdr_terminate_string(rcvbuf, len);
4931 return 0;
4932 out_overflow:
4933 print_overflow_msg(__func__, xdr);
4934 return -EIO;
4935 }
4936
4937 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4938 {
4939 int status;
4940
4941 status = decode_op_hdr(xdr, OP_REMOVE);
4942 if (status)
4943 goto out;
4944 status = decode_change_info(xdr, cinfo);
4945 out:
4946 return status;
4947 }
4948
4949 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4950 struct nfs4_change_info *new_cinfo)
4951 {
4952 int status;
4953
4954 status = decode_op_hdr(xdr, OP_RENAME);
4955 if (status)
4956 goto out;
4957 if ((status = decode_change_info(xdr, old_cinfo)))
4958 goto out;
4959 status = decode_change_info(xdr, new_cinfo);
4960 out:
4961 return status;
4962 }
4963
4964 static int decode_renew(struct xdr_stream *xdr)
4965 {
4966 return decode_op_hdr(xdr, OP_RENEW);
4967 }
4968
4969 static int
4970 decode_restorefh(struct xdr_stream *xdr)
4971 {
4972 return decode_op_hdr(xdr, OP_RESTOREFH);
4973 }
4974
4975 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4976 struct nfs_getaclres *res)
4977 {
4978 __be32 *savep, *bm_p;
4979 uint32_t attrlen,
4980 bitmap[3] = {0};
4981 struct kvec *iov = req->rq_rcv_buf.head;
4982 int status;
4983
4984 res->acl_len = 0;
4985 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4986 goto out;
4987 bm_p = xdr->p;
4988 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4989 goto out;
4990 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4991 goto out;
4992
4993 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4994 return -EIO;
4995 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4996 size_t hdrlen;
4997 u32 recvd;
4998
4999 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5000 * are stored with the acl data to handle the problem of
5001 * variable length bitmaps.*/
5002 xdr->p = bm_p;
5003 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5004 res->acl_data_offset <<= 2;
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 recvd = req->rq_rcv_buf.len - hdrlen;
5011 if (attrlen > recvd) {
5012 if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5013 /* getxattr interface called with a NULL buf */
5014 res->acl_len = attrlen;
5015 goto out;
5016 }
5017 dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
5018 attrlen, recvd);
5019 return -EINVAL;
5020 }
5021 xdr_read_pages(xdr, attrlen);
5022 res->acl_len = attrlen;
5023 } else
5024 status = -EOPNOTSUPP;
5025
5026 out:
5027 return status;
5028 }
5029
5030 static int
5031 decode_savefh(struct xdr_stream *xdr)
5032 {
5033 return decode_op_hdr(xdr, OP_SAVEFH);
5034 }
5035
5036 static int decode_setattr(struct xdr_stream *xdr)
5037 {
5038 __be32 *p;
5039 uint32_t bmlen;
5040 int status;
5041
5042 status = decode_op_hdr(xdr, OP_SETATTR);
5043 if (status)
5044 return status;
5045 p = xdr_inline_decode(xdr, 4);
5046 if (unlikely(!p))
5047 goto out_overflow;
5048 bmlen = be32_to_cpup(p);
5049 p = xdr_inline_decode(xdr, bmlen << 2);
5050 if (likely(p))
5051 return 0;
5052 out_overflow:
5053 print_overflow_msg(__func__, xdr);
5054 return -EIO;
5055 }
5056
5057 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5058 {
5059 __be32 *p;
5060 uint32_t opnum;
5061 int32_t nfserr;
5062
5063 p = xdr_inline_decode(xdr, 8);
5064 if (unlikely(!p))
5065 goto out_overflow;
5066 opnum = be32_to_cpup(p++);
5067 if (opnum != OP_SETCLIENTID) {
5068 dprintk("nfs: decode_setclientid: Server returned operation"
5069 " %d\n", opnum);
5070 return -EIO;
5071 }
5072 nfserr = be32_to_cpup(p);
5073 if (nfserr == NFS_OK) {
5074 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5075 if (unlikely(!p))
5076 goto out_overflow;
5077 p = xdr_decode_hyper(p, &res->clientid);
5078 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5079 } else if (nfserr == NFSERR_CLID_INUSE) {
5080 uint32_t len;
5081
5082 /* skip netid string */
5083 p = xdr_inline_decode(xdr, 4);
5084 if (unlikely(!p))
5085 goto out_overflow;
5086 len = be32_to_cpup(p);
5087 p = xdr_inline_decode(xdr, len);
5088 if (unlikely(!p))
5089 goto out_overflow;
5090
5091 /* skip uaddr string */
5092 p = xdr_inline_decode(xdr, 4);
5093 if (unlikely(!p))
5094 goto out_overflow;
5095 len = be32_to_cpup(p);
5096 p = xdr_inline_decode(xdr, len);
5097 if (unlikely(!p))
5098 goto out_overflow;
5099 return -NFSERR_CLID_INUSE;
5100 } else
5101 return nfs4_stat_to_errno(nfserr);
5102
5103 return 0;
5104 out_overflow:
5105 print_overflow_msg(__func__, xdr);
5106 return -EIO;
5107 }
5108
5109 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5110 {
5111 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5112 }
5113
5114 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5115 {
5116 __be32 *p;
5117 int status;
5118
5119 status = decode_op_hdr(xdr, OP_WRITE);
5120 if (status)
5121 return status;
5122
5123 p = xdr_inline_decode(xdr, 16);
5124 if (unlikely(!p))
5125 goto out_overflow;
5126 res->count = be32_to_cpup(p++);
5127 res->verf->committed = be32_to_cpup(p++);
5128 memcpy(res->verf->verifier, p, 8);
5129 return 0;
5130 out_overflow:
5131 print_overflow_msg(__func__, xdr);
5132 return -EIO;
5133 }
5134
5135 static int decode_delegreturn(struct xdr_stream *xdr)
5136 {
5137 return decode_op_hdr(xdr, OP_DELEGRETURN);
5138 }
5139
5140 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5141 {
5142 __be32 *p;
5143
5144 p = xdr_inline_decode(xdr, 4);
5145 if (unlikely(!p))
5146 goto out_overflow;
5147 flavor->gss.sec_oid4.len = be32_to_cpup(p);
5148 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5149 goto out_err;
5150
5151 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5152 if (unlikely(!p))
5153 goto out_overflow;
5154 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5155
5156 p = xdr_inline_decode(xdr, 8);
5157 if (unlikely(!p))
5158 goto out_overflow;
5159 flavor->gss.qop4 = be32_to_cpup(p++);
5160 flavor->gss.service = be32_to_cpup(p);
5161
5162 return 0;
5163
5164 out_overflow:
5165 print_overflow_msg(__func__, xdr);
5166 return -EIO;
5167 out_err:
5168 return -EINVAL;
5169 }
5170
5171 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5172 {
5173 struct nfs4_secinfo_flavor *sec_flavor;
5174 int status;
5175 __be32 *p;
5176 int i, num_flavors;
5177
5178 status = decode_op_hdr(xdr, OP_SECINFO);
5179 if (status)
5180 goto out;
5181 p = xdr_inline_decode(xdr, 4);
5182 if (unlikely(!p))
5183 goto out_overflow;
5184
5185 res->flavors->num_flavors = 0;
5186 num_flavors = be32_to_cpup(p);
5187
5188 for (i = 0; i < num_flavors; i++) {
5189 sec_flavor = &res->flavors->flavors[i];
5190 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5191 break;
5192
5193 p = xdr_inline_decode(xdr, 4);
5194 if (unlikely(!p))
5195 goto out_overflow;
5196 sec_flavor->flavor = be32_to_cpup(p);
5197
5198 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5199 status = decode_secinfo_gss(xdr, sec_flavor);
5200 if (status)
5201 goto out;
5202 }
5203 res->flavors->num_flavors++;
5204 }
5205
5206 out:
5207 return status;
5208 out_overflow:
5209 print_overflow_msg(__func__, xdr);
5210 return -EIO;
5211 }
5212
5213 #if defined(CONFIG_NFS_V4_1)
5214 static int decode_exchange_id(struct xdr_stream *xdr,
5215 struct nfs41_exchange_id_res *res)
5216 {
5217 __be32 *p;
5218 uint32_t dummy;
5219 char *dummy_str;
5220 int status;
5221 struct nfs_client *clp = res->client;
5222
5223 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5224 if (status)
5225 return status;
5226
5227 p = xdr_inline_decode(xdr, 8);
5228 if (unlikely(!p))
5229 goto out_overflow;
5230 xdr_decode_hyper(p, &clp->cl_clientid);
5231 p = xdr_inline_decode(xdr, 12);
5232 if (unlikely(!p))
5233 goto out_overflow;
5234 clp->cl_seqid = be32_to_cpup(p++);
5235 clp->cl_exchange_flags = be32_to_cpup(p++);
5236
5237 /* We ask for SP4_NONE */
5238 dummy = be32_to_cpup(p);
5239 if (dummy != SP4_NONE)
5240 return -EIO;
5241
5242 /* Throw away minor_id */
5243 p = xdr_inline_decode(xdr, 8);
5244 if (unlikely(!p))
5245 goto out_overflow;
5246
5247 /* Throw away Major id */
5248 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5249 if (unlikely(status))
5250 return status;
5251
5252 /* Save server_scope */
5253 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5254 if (unlikely(status))
5255 return status;
5256
5257 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5258 return -EIO;
5259
5260 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5261 res->server_scope->server_scope_sz = dummy;
5262
5263 /* Throw away Implementation id array */
5264 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5265 if (unlikely(status))
5266 return status;
5267
5268 return 0;
5269 out_overflow:
5270 print_overflow_msg(__func__, xdr);
5271 return -EIO;
5272 }
5273
5274 static int decode_chan_attrs(struct xdr_stream *xdr,
5275 struct nfs4_channel_attrs *attrs)
5276 {
5277 __be32 *p;
5278 u32 nr_attrs, val;
5279
5280 p = xdr_inline_decode(xdr, 28);
5281 if (unlikely(!p))
5282 goto out_overflow;
5283 val = be32_to_cpup(p++); /* headerpadsz */
5284 if (val)
5285 return -EINVAL; /* no support for header padding yet */
5286 attrs->max_rqst_sz = be32_to_cpup(p++);
5287 attrs->max_resp_sz = be32_to_cpup(p++);
5288 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5289 attrs->max_ops = be32_to_cpup(p++);
5290 attrs->max_reqs = be32_to_cpup(p++);
5291 nr_attrs = be32_to_cpup(p);
5292 if (unlikely(nr_attrs > 1)) {
5293 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
5294 __func__, nr_attrs);
5295 return -EINVAL;
5296 }
5297 if (nr_attrs == 1) {
5298 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5299 if (unlikely(!p))
5300 goto out_overflow;
5301 }
5302 return 0;
5303 out_overflow:
5304 print_overflow_msg(__func__, xdr);
5305 return -EIO;
5306 }
5307
5308 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5309 {
5310 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5311 }
5312
5313 static int decode_create_session(struct xdr_stream *xdr,
5314 struct nfs41_create_session_res *res)
5315 {
5316 __be32 *p;
5317 int status;
5318 struct nfs_client *clp = res->client;
5319 struct nfs4_session *session = clp->cl_session;
5320
5321 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5322 if (!status)
5323 status = decode_sessionid(xdr, &session->sess_id);
5324 if (unlikely(status))
5325 return status;
5326
5327 /* seqid, flags */
5328 p = xdr_inline_decode(xdr, 8);
5329 if (unlikely(!p))
5330 goto out_overflow;
5331 clp->cl_seqid = be32_to_cpup(p++);
5332 session->flags = be32_to_cpup(p);
5333
5334 /* Channel attributes */
5335 status = decode_chan_attrs(xdr, &session->fc_attrs);
5336 if (!status)
5337 status = decode_chan_attrs(xdr, &session->bc_attrs);
5338 return status;
5339 out_overflow:
5340 print_overflow_msg(__func__, xdr);
5341 return -EIO;
5342 }
5343
5344 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5345 {
5346 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5347 }
5348
5349 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5350 {
5351 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5352 }
5353 #endif /* CONFIG_NFS_V4_1 */
5354
5355 static int decode_sequence(struct xdr_stream *xdr,
5356 struct nfs4_sequence_res *res,
5357 struct rpc_rqst *rqstp)
5358 {
5359 #if defined(CONFIG_NFS_V4_1)
5360 struct nfs4_sessionid id;
5361 u32 dummy;
5362 int status;
5363 __be32 *p;
5364
5365 if (!res->sr_session)
5366 return 0;
5367
5368 status = decode_op_hdr(xdr, OP_SEQUENCE);
5369 if (!status)
5370 status = decode_sessionid(xdr, &id);
5371 if (unlikely(status))
5372 goto out_err;
5373
5374 /*
5375 * If the server returns different values for sessionID, slotID or
5376 * sequence number, the server is looney tunes.
5377 */
5378 status = -EREMOTEIO;
5379
5380 if (memcmp(id.data, res->sr_session->sess_id.data,
5381 NFS4_MAX_SESSIONID_LEN)) {
5382 dprintk("%s Invalid session id\n", __func__);
5383 goto out_err;
5384 }
5385
5386 p = xdr_inline_decode(xdr, 20);
5387 if (unlikely(!p))
5388 goto out_overflow;
5389
5390 /* seqid */
5391 dummy = be32_to_cpup(p++);
5392 if (dummy != res->sr_slot->seq_nr) {
5393 dprintk("%s Invalid sequence number\n", __func__);
5394 goto out_err;
5395 }
5396 /* slot id */
5397 dummy = be32_to_cpup(p++);
5398 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5399 dprintk("%s Invalid slot id\n", __func__);
5400 goto out_err;
5401 }
5402 /* highest slot id - currently not processed */
5403 dummy = be32_to_cpup(p++);
5404 /* target highest slot id - currently not processed */
5405 dummy = be32_to_cpup(p++);
5406 /* result flags */
5407 res->sr_status_flags = be32_to_cpup(p);
5408 status = 0;
5409 out_err:
5410 res->sr_status = status;
5411 return status;
5412 out_overflow:
5413 print_overflow_msg(__func__, xdr);
5414 status = -EIO;
5415 goto out_err;
5416 #else /* CONFIG_NFS_V4_1 */
5417 return 0;
5418 #endif /* CONFIG_NFS_V4_1 */
5419 }
5420
5421 #if defined(CONFIG_NFS_V4_1)
5422 /*
5423 * TODO: Need to handle case when EOF != true;
5424 */
5425 static int decode_getdevicelist(struct xdr_stream *xdr,
5426 struct pnfs_devicelist *res)
5427 {
5428 __be32 *p;
5429 int status, i;
5430 struct nfs_writeverf verftemp;
5431
5432 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5433 if (status)
5434 return status;
5435
5436 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5437 if (unlikely(!p))
5438 goto out_overflow;
5439
5440 /* TODO: Skip cookie for now */
5441 p += 2;
5442
5443 /* Read verifier */
5444 p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
5445
5446 res->num_devs = be32_to_cpup(p);
5447
5448 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5449
5450 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5451 printk(KERN_ERR "%s too many result dev_num %u\n",
5452 __func__, res->num_devs);
5453 return -EIO;
5454 }
5455
5456 p = xdr_inline_decode(xdr,
5457 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5458 if (unlikely(!p))
5459 goto out_overflow;
5460 for (i = 0; i < res->num_devs; i++)
5461 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5462 NFS4_DEVICEID4_SIZE);
5463 res->eof = be32_to_cpup(p);
5464 return 0;
5465 out_overflow:
5466 print_overflow_msg(__func__, xdr);
5467 return -EIO;
5468 }
5469
5470 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5471 struct pnfs_device *pdev)
5472 {
5473 __be32 *p;
5474 uint32_t len, type;
5475 int status;
5476
5477 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5478 if (status) {
5479 if (status == -ETOOSMALL) {
5480 p = xdr_inline_decode(xdr, 4);
5481 if (unlikely(!p))
5482 goto out_overflow;
5483 pdev->mincount = be32_to_cpup(p);
5484 dprintk("%s: Min count too small. mincnt = %u\n",
5485 __func__, pdev->mincount);
5486 }
5487 return status;
5488 }
5489
5490 p = xdr_inline_decode(xdr, 8);
5491 if (unlikely(!p))
5492 goto out_overflow;
5493 type = be32_to_cpup(p++);
5494 if (type != pdev->layout_type) {
5495 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5496 __func__, pdev->layout_type, type);
5497 return -EINVAL;
5498 }
5499 /*
5500 * Get the length of the opaque device_addr4. xdr_read_pages places
5501 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5502 * and places the remaining xdr data in xdr_buf->tail
5503 */
5504 pdev->mincount = be32_to_cpup(p);
5505 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5506
5507 /* Parse notification bitmap, verifying that it is zero. */
5508 p = xdr_inline_decode(xdr, 4);
5509 if (unlikely(!p))
5510 goto out_overflow;
5511 len = be32_to_cpup(p);
5512 if (len) {
5513 uint32_t i;
5514
5515 p = xdr_inline_decode(xdr, 4 * len);
5516 if (unlikely(!p))
5517 goto out_overflow;
5518 for (i = 0; i < len; i++, p++) {
5519 if (be32_to_cpup(p)) {
5520 dprintk("%s: notifications not supported\n",
5521 __func__);
5522 return -EIO;
5523 }
5524 }
5525 }
5526 return 0;
5527 out_overflow:
5528 print_overflow_msg(__func__, xdr);
5529 return -EIO;
5530 }
5531
5532 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5533 struct nfs4_layoutget_res *res)
5534 {
5535 __be32 *p;
5536 int status;
5537 u32 layout_count;
5538 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5539 struct kvec *iov = rcvbuf->head;
5540 u32 hdrlen, recvd;
5541
5542 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5543 if (status)
5544 return status;
5545 p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5546 if (unlikely(!p))
5547 goto out_overflow;
5548 res->return_on_close = be32_to_cpup(p++);
5549 p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5550 layout_count = be32_to_cpup(p);
5551 if (!layout_count) {
5552 dprintk("%s: server responded with empty layout array\n",
5553 __func__);
5554 return -EINVAL;
5555 }
5556
5557 p = xdr_inline_decode(xdr, 28);
5558 if (unlikely(!p))
5559 goto out_overflow;
5560 p = xdr_decode_hyper(p, &res->range.offset);
5561 p = xdr_decode_hyper(p, &res->range.length);
5562 res->range.iomode = be32_to_cpup(p++);
5563 res->type = be32_to_cpup(p++);
5564 res->layoutp->len = be32_to_cpup(p);
5565
5566 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5567 __func__,
5568 (unsigned long)res->range.offset,
5569 (unsigned long)res->range.length,
5570 res->range.iomode,
5571 res->type,
5572 res->layoutp->len);
5573
5574 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5575 recvd = req->rq_rcv_buf.len - hdrlen;
5576 if (res->layoutp->len > recvd) {
5577 dprintk("NFS: server cheating in layoutget reply: "
5578 "layout len %u > recvd %u\n",
5579 res->layoutp->len, recvd);
5580 return -EINVAL;
5581 }
5582
5583 xdr_read_pages(xdr, res->layoutp->len);
5584
5585 if (layout_count > 1) {
5586 /* We only handle a length one array at the moment. Any
5587 * further entries are just ignored. Note that this means
5588 * the client may see a response that is less than the
5589 * minimum it requested.
5590 */
5591 dprintk("%s: server responded with %d layouts, dropping tail\n",
5592 __func__, layout_count);
5593 }
5594
5595 return 0;
5596 out_overflow:
5597 print_overflow_msg(__func__, xdr);
5598 return -EIO;
5599 }
5600
5601 static int decode_layoutreturn(struct xdr_stream *xdr,
5602 struct nfs4_layoutreturn_res *res)
5603 {
5604 __be32 *p;
5605 int status;
5606
5607 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5608 if (status)
5609 return status;
5610 p = xdr_inline_decode(xdr, 4);
5611 if (unlikely(!p))
5612 goto out_overflow;
5613 res->lrs_present = be32_to_cpup(p);
5614 if (res->lrs_present)
5615 status = decode_stateid(xdr, &res->stateid);
5616 return status;
5617 out_overflow:
5618 print_overflow_msg(__func__, xdr);
5619 return -EIO;
5620 }
5621
5622 static int decode_layoutcommit(struct xdr_stream *xdr,
5623 struct rpc_rqst *req,
5624 struct nfs4_layoutcommit_res *res)
5625 {
5626 __be32 *p;
5627 __u32 sizechanged;
5628 int status;
5629
5630 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5631 res->status = status;
5632 if (status)
5633 return status;
5634
5635 p = xdr_inline_decode(xdr, 4);
5636 if (unlikely(!p))
5637 goto out_overflow;
5638 sizechanged = be32_to_cpup(p);
5639
5640 if (sizechanged) {
5641 /* throw away new size */
5642 p = xdr_inline_decode(xdr, 8);
5643 if (unlikely(!p))
5644 goto out_overflow;
5645 }
5646 return 0;
5647 out_overflow:
5648 print_overflow_msg(__func__, xdr);
5649 return -EIO;
5650 }
5651
5652 static int decode_test_stateid(struct xdr_stream *xdr,
5653 struct nfs41_test_stateid_res *res)
5654 {
5655 __be32 *p;
5656 int status;
5657 int num_res;
5658
5659 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5660 if (status)
5661 return status;
5662
5663 p = xdr_inline_decode(xdr, 4);
5664 if (unlikely(!p))
5665 goto out_overflow;
5666 num_res = be32_to_cpup(p++);
5667 if (num_res != 1)
5668 goto out;
5669
5670 p = xdr_inline_decode(xdr, 4);
5671 if (unlikely(!p))
5672 goto out_overflow;
5673 res->status = be32_to_cpup(p++);
5674
5675 return status;
5676 out_overflow:
5677 print_overflow_msg(__func__, xdr);
5678 out:
5679 return -EIO;
5680 }
5681
5682 static int decode_free_stateid(struct xdr_stream *xdr,
5683 struct nfs41_free_stateid_res *res)
5684 {
5685 __be32 *p;
5686 int status;
5687
5688 status = decode_op_hdr(xdr, OP_FREE_STATEID);
5689 if (status)
5690 return status;
5691
5692 p = xdr_inline_decode(xdr, 4);
5693 if (unlikely(!p))
5694 goto out_overflow;
5695 res->status = be32_to_cpup(p++);
5696 return res->status;
5697 out_overflow:
5698 print_overflow_msg(__func__, xdr);
5699 return -EIO;
5700 }
5701 #endif /* CONFIG_NFS_V4_1 */
5702
5703 /*
5704 * END OF "GENERIC" DECODE ROUTINES.
5705 */
5706
5707 /*
5708 * Decode OPEN_DOWNGRADE response
5709 */
5710 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5711 struct xdr_stream *xdr,
5712 struct nfs_closeres *res)
5713 {
5714 struct compound_hdr hdr;
5715 int status;
5716
5717 status = decode_compound_hdr(xdr, &hdr);
5718 if (status)
5719 goto out;
5720 status = decode_sequence(xdr, &res->seq_res, rqstp);
5721 if (status)
5722 goto out;
5723 status = decode_putfh(xdr);
5724 if (status)
5725 goto out;
5726 status = decode_open_downgrade(xdr, res);
5727 if (status != 0)
5728 goto out;
5729 decode_getfattr(xdr, res->fattr, res->server);
5730 out:
5731 return status;
5732 }
5733
5734 /*
5735 * Decode ACCESS response
5736 */
5737 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5738 struct nfs4_accessres *res)
5739 {
5740 struct compound_hdr hdr;
5741 int status;
5742
5743 status = decode_compound_hdr(xdr, &hdr);
5744 if (status)
5745 goto out;
5746 status = decode_sequence(xdr, &res->seq_res, rqstp);
5747 if (status)
5748 goto out;
5749 status = decode_putfh(xdr);
5750 if (status != 0)
5751 goto out;
5752 status = decode_access(xdr, res);
5753 if (status != 0)
5754 goto out;
5755 decode_getfattr(xdr, res->fattr, res->server);
5756 out:
5757 return status;
5758 }
5759
5760 /*
5761 * Decode LOOKUP response
5762 */
5763 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5764 struct nfs4_lookup_res *res)
5765 {
5766 struct compound_hdr hdr;
5767 int status;
5768
5769 status = decode_compound_hdr(xdr, &hdr);
5770 if (status)
5771 goto out;
5772 status = decode_sequence(xdr, &res->seq_res, rqstp);
5773 if (status)
5774 goto out;
5775 status = decode_putfh(xdr);
5776 if (status)
5777 goto out;
5778 status = decode_lookup(xdr);
5779 if (status)
5780 goto out;
5781 status = decode_getfh(xdr, res->fh);
5782 if (status)
5783 goto out;
5784 status = decode_getfattr(xdr, res->fattr, res->server);
5785 out:
5786 return status;
5787 }
5788
5789 /*
5790 * Decode LOOKUP_ROOT response
5791 */
5792 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5793 struct xdr_stream *xdr,
5794 struct nfs4_lookup_res *res)
5795 {
5796 struct compound_hdr hdr;
5797 int status;
5798
5799 status = decode_compound_hdr(xdr, &hdr);
5800 if (status)
5801 goto out;
5802 status = decode_sequence(xdr, &res->seq_res, rqstp);
5803 if (status)
5804 goto out;
5805 status = decode_putrootfh(xdr);
5806 if (status)
5807 goto out;
5808 status = decode_getfh(xdr, res->fh);
5809 if (status == 0)
5810 status = decode_getfattr(xdr, res->fattr, res->server);
5811 out:
5812 return status;
5813 }
5814
5815 /*
5816 * Decode REMOVE response
5817 */
5818 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5819 struct nfs_removeres *res)
5820 {
5821 struct compound_hdr hdr;
5822 int status;
5823
5824 status = decode_compound_hdr(xdr, &hdr);
5825 if (status)
5826 goto out;
5827 status = decode_sequence(xdr, &res->seq_res, rqstp);
5828 if (status)
5829 goto out;
5830 status = decode_putfh(xdr);
5831 if (status)
5832 goto out;
5833 status = decode_remove(xdr, &res->cinfo);
5834 if (status)
5835 goto out;
5836 decode_getfattr(xdr, res->dir_attr, res->server);
5837 out:
5838 return status;
5839 }
5840
5841 /*
5842 * Decode RENAME response
5843 */
5844 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5845 struct nfs_renameres *res)
5846 {
5847 struct compound_hdr hdr;
5848 int status;
5849
5850 status = decode_compound_hdr(xdr, &hdr);
5851 if (status)
5852 goto out;
5853 status = decode_sequence(xdr, &res->seq_res, rqstp);
5854 if (status)
5855 goto out;
5856 status = decode_putfh(xdr);
5857 if (status)
5858 goto out;
5859 status = decode_savefh(xdr);
5860 if (status)
5861 goto out;
5862 status = decode_putfh(xdr);
5863 if (status)
5864 goto out;
5865 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5866 if (status)
5867 goto out;
5868 /* Current FH is target directory */
5869 if (decode_getfattr(xdr, res->new_fattr, res->server))
5870 goto out;
5871 status = decode_restorefh(xdr);
5872 if (status)
5873 goto out;
5874 decode_getfattr(xdr, res->old_fattr, res->server);
5875 out:
5876 return status;
5877 }
5878
5879 /*
5880 * Decode LINK response
5881 */
5882 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5883 struct nfs4_link_res *res)
5884 {
5885 struct compound_hdr hdr;
5886 int status;
5887
5888 status = decode_compound_hdr(xdr, &hdr);
5889 if (status)
5890 goto out;
5891 status = decode_sequence(xdr, &res->seq_res, rqstp);
5892 if (status)
5893 goto out;
5894 status = decode_putfh(xdr);
5895 if (status)
5896 goto out;
5897 status = decode_savefh(xdr);
5898 if (status)
5899 goto out;
5900 status = decode_putfh(xdr);
5901 if (status)
5902 goto out;
5903 status = decode_link(xdr, &res->cinfo);
5904 if (status)
5905 goto out;
5906 /*
5907 * Note order: OP_LINK leaves the directory as the current
5908 * filehandle.
5909 */
5910 if (decode_getfattr(xdr, res->dir_attr, res->server))
5911 goto out;
5912 status = decode_restorefh(xdr);
5913 if (status)
5914 goto out;
5915 decode_getfattr(xdr, res->fattr, res->server);
5916 out:
5917 return status;
5918 }
5919
5920 /*
5921 * Decode CREATE response
5922 */
5923 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5924 struct nfs4_create_res *res)
5925 {
5926 struct compound_hdr hdr;
5927 int status;
5928
5929 status = decode_compound_hdr(xdr, &hdr);
5930 if (status)
5931 goto out;
5932 status = decode_sequence(xdr, &res->seq_res, rqstp);
5933 if (status)
5934 goto out;
5935 status = decode_putfh(xdr);
5936 if (status)
5937 goto out;
5938 status = decode_savefh(xdr);
5939 if (status)
5940 goto out;
5941 status = decode_create(xdr, &res->dir_cinfo);
5942 if (status)
5943 goto out;
5944 status = decode_getfh(xdr, res->fh);
5945 if (status)
5946 goto out;
5947 if (decode_getfattr(xdr, res->fattr, res->server))
5948 goto out;
5949 status = decode_restorefh(xdr);
5950 if (status)
5951 goto out;
5952 decode_getfattr(xdr, res->dir_fattr, res->server);
5953 out:
5954 return status;
5955 }
5956
5957 /*
5958 * Decode SYMLINK response
5959 */
5960 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5961 struct nfs4_create_res *res)
5962 {
5963 return nfs4_xdr_dec_create(rqstp, xdr, res);
5964 }
5965
5966 /*
5967 * Decode GETATTR response
5968 */
5969 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5970 struct nfs4_getattr_res *res)
5971 {
5972 struct compound_hdr hdr;
5973 int status;
5974
5975 status = decode_compound_hdr(xdr, &hdr);
5976 if (status)
5977 goto out;
5978 status = decode_sequence(xdr, &res->seq_res, rqstp);
5979 if (status)
5980 goto out;
5981 status = decode_putfh(xdr);
5982 if (status)
5983 goto out;
5984 status = decode_getfattr(xdr, res->fattr, res->server);
5985 out:
5986 return status;
5987 }
5988
5989 /*
5990 * Encode an SETACL request
5991 */
5992 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5993 struct nfs_setaclargs *args)
5994 {
5995 struct compound_hdr hdr = {
5996 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5997 };
5998
5999 encode_compound_hdr(xdr, req, &hdr);
6000 encode_sequence(xdr, &args->seq_args, &hdr);
6001 encode_putfh(xdr, args->fh, &hdr);
6002 encode_setacl(xdr, args, &hdr);
6003 encode_nops(&hdr);
6004 }
6005
6006 /*
6007 * Decode SETACL response
6008 */
6009 static int
6010 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6011 struct nfs_setaclres *res)
6012 {
6013 struct compound_hdr hdr;
6014 int status;
6015
6016 status = decode_compound_hdr(xdr, &hdr);
6017 if (status)
6018 goto out;
6019 status = decode_sequence(xdr, &res->seq_res, rqstp);
6020 if (status)
6021 goto out;
6022 status = decode_putfh(xdr);
6023 if (status)
6024 goto out;
6025 status = decode_setattr(xdr);
6026 out:
6027 return status;
6028 }
6029
6030 /*
6031 * Decode GETACL response
6032 */
6033 static int
6034 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6035 struct nfs_getaclres *res)
6036 {
6037 struct compound_hdr hdr;
6038 int status;
6039
6040 status = decode_compound_hdr(xdr, &hdr);
6041 if (status)
6042 goto out;
6043 status = decode_sequence(xdr, &res->seq_res, rqstp);
6044 if (status)
6045 goto out;
6046 status = decode_putfh(xdr);
6047 if (status)
6048 goto out;
6049 status = decode_getacl(xdr, rqstp, res);
6050
6051 out:
6052 return status;
6053 }
6054
6055 /*
6056 * Decode CLOSE response
6057 */
6058 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6059 struct nfs_closeres *res)
6060 {
6061 struct compound_hdr hdr;
6062 int status;
6063
6064 status = decode_compound_hdr(xdr, &hdr);
6065 if (status)
6066 goto out;
6067 status = decode_sequence(xdr, &res->seq_res, rqstp);
6068 if (status)
6069 goto out;
6070 status = decode_putfh(xdr);
6071 if (status)
6072 goto out;
6073 status = decode_close(xdr, res);
6074 if (status != 0)
6075 goto out;
6076 /*
6077 * Note: Server may do delete on close for this file
6078 * in which case the getattr call will fail with
6079 * an ESTALE error. Shouldn't be a problem,
6080 * though, since fattr->valid will remain unset.
6081 */
6082 decode_getfattr(xdr, res->fattr, res->server);
6083 out:
6084 return status;
6085 }
6086
6087 /*
6088 * Decode OPEN response
6089 */
6090 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6091 struct nfs_openres *res)
6092 {
6093 struct compound_hdr hdr;
6094 int status;
6095
6096 status = decode_compound_hdr(xdr, &hdr);
6097 if (status)
6098 goto out;
6099 status = decode_sequence(xdr, &res->seq_res, rqstp);
6100 if (status)
6101 goto out;
6102 status = decode_putfh(xdr);
6103 if (status)
6104 goto out;
6105 status = decode_savefh(xdr);
6106 if (status)
6107 goto out;
6108 status = decode_open(xdr, res);
6109 if (status)
6110 goto out;
6111 if (decode_getfh(xdr, &res->fh) != 0)
6112 goto out;
6113 if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6114 goto out;
6115 if (decode_restorefh(xdr) != 0)
6116 goto out;
6117 decode_getfattr(xdr, res->dir_attr, res->server);
6118 out:
6119 return status;
6120 }
6121
6122 /*
6123 * Decode OPEN_CONFIRM response
6124 */
6125 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6126 struct xdr_stream *xdr,
6127 struct nfs_open_confirmres *res)
6128 {
6129 struct compound_hdr hdr;
6130 int status;
6131
6132 status = decode_compound_hdr(xdr, &hdr);
6133 if (status)
6134 goto out;
6135 status = decode_putfh(xdr);
6136 if (status)
6137 goto out;
6138 status = decode_open_confirm(xdr, res);
6139 out:
6140 return status;
6141 }
6142
6143 /*
6144 * Decode OPEN response
6145 */
6146 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6147 struct xdr_stream *xdr,
6148 struct nfs_openres *res)
6149 {
6150 struct compound_hdr hdr;
6151 int status;
6152
6153 status = decode_compound_hdr(xdr, &hdr);
6154 if (status)
6155 goto out;
6156 status = decode_sequence(xdr, &res->seq_res, rqstp);
6157 if (status)
6158 goto out;
6159 status = decode_putfh(xdr);
6160 if (status)
6161 goto out;
6162 status = decode_open(xdr, res);
6163 if (status)
6164 goto out;
6165 decode_getfattr(xdr, res->f_attr, res->server);
6166 out:
6167 return status;
6168 }
6169
6170 /*
6171 * Decode SETATTR response
6172 */
6173 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6174 struct xdr_stream *xdr,
6175 struct nfs_setattrres *res)
6176 {
6177 struct compound_hdr hdr;
6178 int status;
6179
6180 status = decode_compound_hdr(xdr, &hdr);
6181 if (status)
6182 goto out;
6183 status = decode_sequence(xdr, &res->seq_res, rqstp);
6184 if (status)
6185 goto out;
6186 status = decode_putfh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_setattr(xdr);
6190 if (status)
6191 goto out;
6192 decode_getfattr(xdr, res->fattr, res->server);
6193 out:
6194 return status;
6195 }
6196
6197 /*
6198 * Decode LOCK response
6199 */
6200 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6201 struct nfs_lock_res *res)
6202 {
6203 struct compound_hdr hdr;
6204 int status;
6205
6206 status = decode_compound_hdr(xdr, &hdr);
6207 if (status)
6208 goto out;
6209 status = decode_sequence(xdr, &res->seq_res, rqstp);
6210 if (status)
6211 goto out;
6212 status = decode_putfh(xdr);
6213 if (status)
6214 goto out;
6215 status = decode_lock(xdr, res);
6216 out:
6217 return status;
6218 }
6219
6220 /*
6221 * Decode LOCKT response
6222 */
6223 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6224 struct nfs_lockt_res *res)
6225 {
6226 struct compound_hdr hdr;
6227 int status;
6228
6229 status = decode_compound_hdr(xdr, &hdr);
6230 if (status)
6231 goto out;
6232 status = decode_sequence(xdr, &res->seq_res, rqstp);
6233 if (status)
6234 goto out;
6235 status = decode_putfh(xdr);
6236 if (status)
6237 goto out;
6238 status = decode_lockt(xdr, res);
6239 out:
6240 return status;
6241 }
6242
6243 /*
6244 * Decode LOCKU response
6245 */
6246 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6247 struct nfs_locku_res *res)
6248 {
6249 struct compound_hdr hdr;
6250 int status;
6251
6252 status = decode_compound_hdr(xdr, &hdr);
6253 if (status)
6254 goto out;
6255 status = decode_sequence(xdr, &res->seq_res, rqstp);
6256 if (status)
6257 goto out;
6258 status = decode_putfh(xdr);
6259 if (status)
6260 goto out;
6261 status = decode_locku(xdr, res);
6262 out:
6263 return status;
6264 }
6265
6266 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6267 struct xdr_stream *xdr, void *dummy)
6268 {
6269 struct compound_hdr hdr;
6270 int status;
6271
6272 status = decode_compound_hdr(xdr, &hdr);
6273 if (!status)
6274 status = decode_release_lockowner(xdr);
6275 return status;
6276 }
6277
6278 /*
6279 * Decode READLINK response
6280 */
6281 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6282 struct xdr_stream *xdr,
6283 struct nfs4_readlink_res *res)
6284 {
6285 struct compound_hdr hdr;
6286 int status;
6287
6288 status = decode_compound_hdr(xdr, &hdr);
6289 if (status)
6290 goto out;
6291 status = decode_sequence(xdr, &res->seq_res, rqstp);
6292 if (status)
6293 goto out;
6294 status = decode_putfh(xdr);
6295 if (status)
6296 goto out;
6297 status = decode_readlink(xdr, rqstp);
6298 out:
6299 return status;
6300 }
6301
6302 /*
6303 * Decode READDIR response
6304 */
6305 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6306 struct nfs4_readdir_res *res)
6307 {
6308 struct compound_hdr hdr;
6309 int status;
6310
6311 status = decode_compound_hdr(xdr, &hdr);
6312 if (status)
6313 goto out;
6314 status = decode_sequence(xdr, &res->seq_res, rqstp);
6315 if (status)
6316 goto out;
6317 status = decode_putfh(xdr);
6318 if (status)
6319 goto out;
6320 status = decode_readdir(xdr, rqstp, res);
6321 out:
6322 return status;
6323 }
6324
6325 /*
6326 * Decode Read response
6327 */
6328 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329 struct nfs_readres *res)
6330 {
6331 struct compound_hdr hdr;
6332 int status;
6333
6334 status = decode_compound_hdr(xdr, &hdr);
6335 if (status)
6336 goto out;
6337 status = decode_sequence(xdr, &res->seq_res, rqstp);
6338 if (status)
6339 goto out;
6340 status = decode_putfh(xdr);
6341 if (status)
6342 goto out;
6343 status = decode_read(xdr, rqstp, res);
6344 if (!status)
6345 status = res->count;
6346 out:
6347 return status;
6348 }
6349
6350 /*
6351 * Decode WRITE response
6352 */
6353 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6354 struct nfs_writeres *res)
6355 {
6356 struct compound_hdr hdr;
6357 int status;
6358
6359 status = decode_compound_hdr(xdr, &hdr);
6360 if (status)
6361 goto out;
6362 status = decode_sequence(xdr, &res->seq_res, rqstp);
6363 if (status)
6364 goto out;
6365 status = decode_putfh(xdr);
6366 if (status)
6367 goto out;
6368 status = decode_write(xdr, res);
6369 if (status)
6370 goto out;
6371 if (res->fattr)
6372 decode_getfattr(xdr, res->fattr, res->server);
6373 if (!status)
6374 status = res->count;
6375 out:
6376 return status;
6377 }
6378
6379 /*
6380 * Decode COMMIT response
6381 */
6382 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6383 struct nfs_writeres *res)
6384 {
6385 struct compound_hdr hdr;
6386 int status;
6387
6388 status = decode_compound_hdr(xdr, &hdr);
6389 if (status)
6390 goto out;
6391 status = decode_sequence(xdr, &res->seq_res, rqstp);
6392 if (status)
6393 goto out;
6394 status = decode_putfh(xdr);
6395 if (status)
6396 goto out;
6397 status = decode_commit(xdr, res);
6398 if (status)
6399 goto out;
6400 if (res->fattr)
6401 decode_getfattr(xdr, res->fattr, res->server);
6402 out:
6403 return status;
6404 }
6405
6406 /*
6407 * Decode FSINFO response
6408 */
6409 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6410 struct nfs4_fsinfo_res *res)
6411 {
6412 struct compound_hdr hdr;
6413 int status;
6414
6415 status = decode_compound_hdr(xdr, &hdr);
6416 if (!status)
6417 status = decode_sequence(xdr, &res->seq_res, req);
6418 if (!status)
6419 status = decode_putfh(xdr);
6420 if (!status)
6421 status = decode_fsinfo(xdr, res->fsinfo);
6422 return status;
6423 }
6424
6425 /*
6426 * Decode PATHCONF response
6427 */
6428 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6429 struct nfs4_pathconf_res *res)
6430 {
6431 struct compound_hdr hdr;
6432 int status;
6433
6434 status = decode_compound_hdr(xdr, &hdr);
6435 if (!status)
6436 status = decode_sequence(xdr, &res->seq_res, req);
6437 if (!status)
6438 status = decode_putfh(xdr);
6439 if (!status)
6440 status = decode_pathconf(xdr, res->pathconf);
6441 return status;
6442 }
6443
6444 /*
6445 * Decode STATFS response
6446 */
6447 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6448 struct nfs4_statfs_res *res)
6449 {
6450 struct compound_hdr hdr;
6451 int status;
6452
6453 status = decode_compound_hdr(xdr, &hdr);
6454 if (!status)
6455 status = decode_sequence(xdr, &res->seq_res, req);
6456 if (!status)
6457 status = decode_putfh(xdr);
6458 if (!status)
6459 status = decode_statfs(xdr, res->fsstat);
6460 return status;
6461 }
6462
6463 /*
6464 * Decode GETATTR_BITMAP response
6465 */
6466 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6467 struct xdr_stream *xdr,
6468 struct nfs4_server_caps_res *res)
6469 {
6470 struct compound_hdr hdr;
6471 int status;
6472
6473 status = decode_compound_hdr(xdr, &hdr);
6474 if (status)
6475 goto out;
6476 status = decode_sequence(xdr, &res->seq_res, req);
6477 if (status)
6478 goto out;
6479 status = decode_putfh(xdr);
6480 if (status)
6481 goto out;
6482 status = decode_server_caps(xdr, res);
6483 out:
6484 return status;
6485 }
6486
6487 /*
6488 * Decode RENEW response
6489 */
6490 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6491 void *__unused)
6492 {
6493 struct compound_hdr hdr;
6494 int status;
6495
6496 status = decode_compound_hdr(xdr, &hdr);
6497 if (!status)
6498 status = decode_renew(xdr);
6499 return status;
6500 }
6501
6502 /*
6503 * Decode SETCLIENTID response
6504 */
6505 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6506 struct xdr_stream *xdr,
6507 struct nfs4_setclientid_res *res)
6508 {
6509 struct compound_hdr hdr;
6510 int status;
6511
6512 status = decode_compound_hdr(xdr, &hdr);
6513 if (!status)
6514 status = decode_setclientid(xdr, res);
6515 return status;
6516 }
6517
6518 /*
6519 * Decode SETCLIENTID_CONFIRM response
6520 */
6521 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6522 struct xdr_stream *xdr,
6523 struct nfs_fsinfo *fsinfo)
6524 {
6525 struct compound_hdr hdr;
6526 int status;
6527
6528 status = decode_compound_hdr(xdr, &hdr);
6529 if (!status)
6530 status = decode_setclientid_confirm(xdr);
6531 if (!status)
6532 status = decode_putrootfh(xdr);
6533 if (!status)
6534 status = decode_fsinfo(xdr, fsinfo);
6535 return status;
6536 }
6537
6538 /*
6539 * Decode DELEGRETURN response
6540 */
6541 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6542 struct xdr_stream *xdr,
6543 struct nfs4_delegreturnres *res)
6544 {
6545 struct compound_hdr hdr;
6546 int status;
6547
6548 status = decode_compound_hdr(xdr, &hdr);
6549 if (status)
6550 goto out;
6551 status = decode_sequence(xdr, &res->seq_res, rqstp);
6552 if (status)
6553 goto out;
6554 status = decode_putfh(xdr);
6555 if (status != 0)
6556 goto out;
6557 status = decode_delegreturn(xdr);
6558 if (status != 0)
6559 goto out;
6560 decode_getfattr(xdr, res->fattr, res->server);
6561 out:
6562 return status;
6563 }
6564
6565 /*
6566 * Decode FS_LOCATIONS response
6567 */
6568 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6569 struct xdr_stream *xdr,
6570 struct nfs4_fs_locations_res *res)
6571 {
6572 struct compound_hdr hdr;
6573 int status;
6574
6575 status = decode_compound_hdr(xdr, &hdr);
6576 if (status)
6577 goto out;
6578 status = decode_sequence(xdr, &res->seq_res, req);
6579 if (status)
6580 goto out;
6581 status = decode_putfh(xdr);
6582 if (status)
6583 goto out;
6584 status = decode_lookup(xdr);
6585 if (status)
6586 goto out;
6587 xdr_enter_page(xdr, PAGE_SIZE);
6588 status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6589 NULL, res->fs_locations,
6590 res->fs_locations->server);
6591 out:
6592 return status;
6593 }
6594
6595 /*
6596 * Decode SECINFO response
6597 */
6598 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6599 struct xdr_stream *xdr,
6600 struct nfs4_secinfo_res *res)
6601 {
6602 struct compound_hdr hdr;
6603 int status;
6604
6605 status = decode_compound_hdr(xdr, &hdr);
6606 if (status)
6607 goto out;
6608 status = decode_sequence(xdr, &res->seq_res, rqstp);
6609 if (status)
6610 goto out;
6611 status = decode_putfh(xdr);
6612 if (status)
6613 goto out;
6614 status = decode_secinfo(xdr, res);
6615 out:
6616 return status;
6617 }
6618
6619 #if defined(CONFIG_NFS_V4_1)
6620 /*
6621 * Decode EXCHANGE_ID response
6622 */
6623 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6624 struct xdr_stream *xdr,
6625 void *res)
6626 {
6627 struct compound_hdr hdr;
6628 int status;
6629
6630 status = decode_compound_hdr(xdr, &hdr);
6631 if (!status)
6632 status = decode_exchange_id(xdr, res);
6633 return status;
6634 }
6635
6636 /*
6637 * Decode CREATE_SESSION response
6638 */
6639 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6640 struct xdr_stream *xdr,
6641 struct nfs41_create_session_res *res)
6642 {
6643 struct compound_hdr hdr;
6644 int status;
6645
6646 status = decode_compound_hdr(xdr, &hdr);
6647 if (!status)
6648 status = decode_create_session(xdr, res);
6649 return status;
6650 }
6651
6652 /*
6653 * Decode DESTROY_SESSION response
6654 */
6655 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6656 struct xdr_stream *xdr,
6657 void *res)
6658 {
6659 struct compound_hdr hdr;
6660 int status;
6661
6662 status = decode_compound_hdr(xdr, &hdr);
6663 if (!status)
6664 status = decode_destroy_session(xdr, res);
6665 return status;
6666 }
6667
6668 /*
6669 * Decode SEQUENCE response
6670 */
6671 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6672 struct xdr_stream *xdr,
6673 struct nfs4_sequence_res *res)
6674 {
6675 struct compound_hdr hdr;
6676 int status;
6677
6678 status = decode_compound_hdr(xdr, &hdr);
6679 if (!status)
6680 status = decode_sequence(xdr, res, rqstp);
6681 return status;
6682 }
6683
6684 /*
6685 * Decode GET_LEASE_TIME response
6686 */
6687 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6688 struct xdr_stream *xdr,
6689 struct nfs4_get_lease_time_res *res)
6690 {
6691 struct compound_hdr hdr;
6692 int status;
6693
6694 status = decode_compound_hdr(xdr, &hdr);
6695 if (!status)
6696 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6697 if (!status)
6698 status = decode_putrootfh(xdr);
6699 if (!status)
6700 status = decode_fsinfo(xdr, res->lr_fsinfo);
6701 return status;
6702 }
6703
6704 /*
6705 * Decode RECLAIM_COMPLETE response
6706 */
6707 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6708 struct xdr_stream *xdr,
6709 struct nfs41_reclaim_complete_res *res)
6710 {
6711 struct compound_hdr hdr;
6712 int status;
6713
6714 status = decode_compound_hdr(xdr, &hdr);
6715 if (!status)
6716 status = decode_sequence(xdr, &res->seq_res, rqstp);
6717 if (!status)
6718 status = decode_reclaim_complete(xdr, (void *)NULL);
6719 return status;
6720 }
6721
6722 /*
6723 * Decode GETDEVICELIST response
6724 */
6725 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6726 struct xdr_stream *xdr,
6727 struct nfs4_getdevicelist_res *res)
6728 {
6729 struct compound_hdr hdr;
6730 int status;
6731
6732 dprintk("encoding getdevicelist!\n");
6733
6734 status = decode_compound_hdr(xdr, &hdr);
6735 if (status != 0)
6736 goto out;
6737 status = decode_sequence(xdr, &res->seq_res, rqstp);
6738 if (status != 0)
6739 goto out;
6740 status = decode_putfh(xdr);
6741 if (status != 0)
6742 goto out;
6743 status = decode_getdevicelist(xdr, res->devlist);
6744 out:
6745 return status;
6746 }
6747
6748 /*
6749 * Decode GETDEVINFO response
6750 */
6751 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6752 struct xdr_stream *xdr,
6753 struct nfs4_getdeviceinfo_res *res)
6754 {
6755 struct compound_hdr hdr;
6756 int status;
6757
6758 status = decode_compound_hdr(xdr, &hdr);
6759 if (status != 0)
6760 goto out;
6761 status = decode_sequence(xdr, &res->seq_res, rqstp);
6762 if (status != 0)
6763 goto out;
6764 status = decode_getdeviceinfo(xdr, res->pdev);
6765 out:
6766 return status;
6767 }
6768
6769 /*
6770 * Decode LAYOUTGET response
6771 */
6772 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6773 struct xdr_stream *xdr,
6774 struct nfs4_layoutget_res *res)
6775 {
6776 struct compound_hdr hdr;
6777 int status;
6778
6779 status = decode_compound_hdr(xdr, &hdr);
6780 if (status)
6781 goto out;
6782 status = decode_sequence(xdr, &res->seq_res, rqstp);
6783 if (status)
6784 goto out;
6785 status = decode_putfh(xdr);
6786 if (status)
6787 goto out;
6788 status = decode_layoutget(xdr, rqstp, res);
6789 out:
6790 return status;
6791 }
6792
6793 /*
6794 * Decode LAYOUTRETURN response
6795 */
6796 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6797 struct xdr_stream *xdr,
6798 struct nfs4_layoutreturn_res *res)
6799 {
6800 struct compound_hdr hdr;
6801 int status;
6802
6803 status = decode_compound_hdr(xdr, &hdr);
6804 if (status)
6805 goto out;
6806 status = decode_sequence(xdr, &res->seq_res, rqstp);
6807 if (status)
6808 goto out;
6809 status = decode_putfh(xdr);
6810 if (status)
6811 goto out;
6812 status = decode_layoutreturn(xdr, res);
6813 out:
6814 return status;
6815 }
6816
6817 /*
6818 * Decode LAYOUTCOMMIT response
6819 */
6820 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6821 struct xdr_stream *xdr,
6822 struct nfs4_layoutcommit_res *res)
6823 {
6824 struct compound_hdr hdr;
6825 int status;
6826
6827 status = decode_compound_hdr(xdr, &hdr);
6828 if (status)
6829 goto out;
6830 status = decode_sequence(xdr, &res->seq_res, rqstp);
6831 if (status)
6832 goto out;
6833 status = decode_putfh(xdr);
6834 if (status)
6835 goto out;
6836 status = decode_layoutcommit(xdr, rqstp, res);
6837 if (status)
6838 goto out;
6839 decode_getfattr(xdr, res->fattr, res->server);
6840 out:
6841 return status;
6842 }
6843
6844 /*
6845 * Decode SECINFO_NO_NAME response
6846 */
6847 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6848 struct xdr_stream *xdr,
6849 struct nfs4_secinfo_res *res)
6850 {
6851 struct compound_hdr hdr;
6852 int status;
6853
6854 status = decode_compound_hdr(xdr, &hdr);
6855 if (status)
6856 goto out;
6857 status = decode_sequence(xdr, &res->seq_res, rqstp);
6858 if (status)
6859 goto out;
6860 status = decode_putrootfh(xdr);
6861 if (status)
6862 goto out;
6863 status = decode_secinfo(xdr, res);
6864 out:
6865 return status;
6866 }
6867
6868 /*
6869 * Decode TEST_STATEID response
6870 */
6871 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6872 struct xdr_stream *xdr,
6873 struct nfs41_test_stateid_res *res)
6874 {
6875 struct compound_hdr hdr;
6876 int status;
6877
6878 status = decode_compound_hdr(xdr, &hdr);
6879 if (status)
6880 goto out;
6881 status = decode_sequence(xdr, &res->seq_res, rqstp);
6882 if (status)
6883 goto out;
6884 status = decode_test_stateid(xdr, res);
6885 out:
6886 return status;
6887 }
6888
6889 /*
6890 * Decode FREE_STATEID response
6891 */
6892 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6893 struct xdr_stream *xdr,
6894 struct nfs41_free_stateid_res *res)
6895 {
6896 struct compound_hdr hdr;
6897 int status;
6898
6899 status = decode_compound_hdr(xdr, &hdr);
6900 if (status)
6901 goto out;
6902 status = decode_sequence(xdr, &res->seq_res, rqstp);
6903 if (status)
6904 goto out;
6905 status = decode_free_stateid(xdr, res);
6906 out:
6907 return status;
6908 }
6909 #endif /* CONFIG_NFS_V4_1 */
6910
6911 /**
6912 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6913 * the local page cache.
6914 * @xdr: XDR stream where entry resides
6915 * @entry: buffer to fill in with entry data
6916 * @plus: boolean indicating whether this should be a readdirplus entry
6917 *
6918 * Returns zero if successful, otherwise a negative errno value is
6919 * returned.
6920 *
6921 * This function is not invoked during READDIR reply decoding, but
6922 * rather whenever an application invokes the getdents(2) system call
6923 * on a directory already in our cache.
6924 */
6925 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6926 int plus)
6927 {
6928 uint32_t bitmap[3] = {0};
6929 uint32_t len;
6930 __be32 *p = xdr_inline_decode(xdr, 4);
6931 if (unlikely(!p))
6932 goto out_overflow;
6933 if (*p == xdr_zero) {
6934 p = xdr_inline_decode(xdr, 4);
6935 if (unlikely(!p))
6936 goto out_overflow;
6937 if (*p == xdr_zero)
6938 return -EAGAIN;
6939 entry->eof = 1;
6940 return -EBADCOOKIE;
6941 }
6942
6943 p = xdr_inline_decode(xdr, 12);
6944 if (unlikely(!p))
6945 goto out_overflow;
6946 entry->prev_cookie = entry->cookie;
6947 p = xdr_decode_hyper(p, &entry->cookie);
6948 entry->len = be32_to_cpup(p);
6949
6950 p = xdr_inline_decode(xdr, entry->len);
6951 if (unlikely(!p))
6952 goto out_overflow;
6953 entry->name = (const char *) p;
6954
6955 /*
6956 * In case the server doesn't return an inode number,
6957 * we fake one here. (We don't use inode number 0,
6958 * since glibc seems to choke on it...)
6959 */
6960 entry->ino = 1;
6961 entry->fattr->valid = 0;
6962
6963 if (decode_attr_bitmap(xdr, bitmap) < 0)
6964 goto out_overflow;
6965
6966 if (decode_attr_length(xdr, &len, &p) < 0)
6967 goto out_overflow;
6968
6969 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6970 NULL, entry->server) < 0)
6971 goto out_overflow;
6972 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6973 entry->ino = entry->fattr->mounted_on_fileid;
6974 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6975 entry->ino = entry->fattr->fileid;
6976
6977 entry->d_type = DT_UNKNOWN;
6978 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6979 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6980
6981 return 0;
6982
6983 out_overflow:
6984 print_overflow_msg(__func__, xdr);
6985 return -EAGAIN;
6986 }
6987
6988 /*
6989 * We need to translate between nfs status return values and
6990 * the local errno values which may not be the same.
6991 */
6992 static struct {
6993 int stat;
6994 int errno;
6995 } nfs_errtbl[] = {
6996 { NFS4_OK, 0 },
6997 { NFS4ERR_PERM, -EPERM },
6998 { NFS4ERR_NOENT, -ENOENT },
6999 { NFS4ERR_IO, -errno_NFSERR_IO},
7000 { NFS4ERR_NXIO, -ENXIO },
7001 { NFS4ERR_ACCESS, -EACCES },
7002 { NFS4ERR_EXIST, -EEXIST },
7003 { NFS4ERR_XDEV, -EXDEV },
7004 { NFS4ERR_NOTDIR, -ENOTDIR },
7005 { NFS4ERR_ISDIR, -EISDIR },
7006 { NFS4ERR_INVAL, -EINVAL },
7007 { NFS4ERR_FBIG, -EFBIG },
7008 { NFS4ERR_NOSPC, -ENOSPC },
7009 { NFS4ERR_ROFS, -EROFS },
7010 { NFS4ERR_MLINK, -EMLINK },
7011 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7012 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7013 { NFS4ERR_DQUOT, -EDQUOT },
7014 { NFS4ERR_STALE, -ESTALE },
7015 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7016 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7017 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7018 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7019 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7020 { NFS4ERR_BADTYPE, -EBADTYPE },
7021 { NFS4ERR_LOCKED, -EAGAIN },
7022 { NFS4ERR_SYMLINK, -ELOOP },
7023 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7024 { NFS4ERR_DEADLOCK, -EDEADLK },
7025 { -1, -EIO }
7026 };
7027
7028 /*
7029 * Convert an NFS error code to a local one.
7030 * This one is used jointly by NFSv2 and NFSv3.
7031 */
7032 static int
7033 nfs4_stat_to_errno(int stat)
7034 {
7035 int i;
7036 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7037 if (nfs_errtbl[i].stat == stat)
7038 return nfs_errtbl[i].errno;
7039 }
7040 if (stat <= 10000 || stat > 10100) {
7041 /* The server is looney tunes. */
7042 return -EREMOTEIO;
7043 }
7044 /* If we cannot translate the error, the recovery routines should
7045 * handle it.
7046 * Note: remaining NFSv4 error codes have values > 10000, so should
7047 * not conflict with native Linux error codes.
7048 */
7049 return -stat;
7050 }
7051
7052 #define PROC(proc, argtype, restype) \
7053 [NFSPROC4_CLNT_##proc] = { \
7054 .p_proc = NFSPROC4_COMPOUND, \
7055 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7056 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7057 .p_arglen = NFS4_##argtype##_sz, \
7058 .p_replen = NFS4_##restype##_sz, \
7059 .p_statidx = NFSPROC4_CLNT_##proc, \
7060 .p_name = #proc, \
7061 }
7062
7063 struct rpc_procinfo nfs4_procedures[] = {
7064 PROC(READ, enc_read, dec_read),
7065 PROC(WRITE, enc_write, dec_write),
7066 PROC(COMMIT, enc_commit, dec_commit),
7067 PROC(OPEN, enc_open, dec_open),
7068 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7069 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7070 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7071 PROC(CLOSE, enc_close, dec_close),
7072 PROC(SETATTR, enc_setattr, dec_setattr),
7073 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7074 PROC(RENEW, enc_renew, dec_renew),
7075 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7076 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7077 PROC(LOCK, enc_lock, dec_lock),
7078 PROC(LOCKT, enc_lockt, dec_lockt),
7079 PROC(LOCKU, enc_locku, dec_locku),
7080 PROC(ACCESS, enc_access, dec_access),
7081 PROC(GETATTR, enc_getattr, dec_getattr),
7082 PROC(LOOKUP, enc_lookup, dec_lookup),
7083 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7084 PROC(REMOVE, enc_remove, dec_remove),
7085 PROC(RENAME, enc_rename, dec_rename),
7086 PROC(LINK, enc_link, dec_link),
7087 PROC(SYMLINK, enc_symlink, dec_symlink),
7088 PROC(CREATE, enc_create, dec_create),
7089 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7090 PROC(STATFS, enc_statfs, dec_statfs),
7091 PROC(READLINK, enc_readlink, dec_readlink),
7092 PROC(READDIR, enc_readdir, dec_readdir),
7093 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7094 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7095 PROC(GETACL, enc_getacl, dec_getacl),
7096 PROC(SETACL, enc_setacl, dec_setacl),
7097 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7098 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7099 PROC(SECINFO, enc_secinfo, dec_secinfo),
7100 #if defined(CONFIG_NFS_V4_1)
7101 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7102 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7103 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7104 PROC(SEQUENCE, enc_sequence, dec_sequence),
7105 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7106 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7107 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7108 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7109 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7110 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7111 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7112 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7113 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7114 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7115 #endif /* CONFIG_NFS_V4_1 */
7116 };
7117
7118 const struct rpc_version nfs_version4 = {
7119 .number = 4,
7120 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7121 .procs = nfs4_procedures
7122 };
7123
7124 /*
7125 * Local variables:
7126 * c-basic-offset: 8
7127 * End:
7128 */
Linux kernel - Deliverables
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