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NFSv4: Ensure we do not reuse open owner names
[linux-2.6.git] / fs / nfs / nfs4xdr.c
blob77fc5f959c4ecf4322c3846323eb3bf4cdb22081
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56 #include "nfs4_fs.h"
57 #include "internal.h"
58 #include "pnfs.h"
59
60 #define NFSDBG_FACILITY NFSDBG_XDR
61
62 /* Mapping from NFS error code to "errno" error code. */
63 #define errno_NFSERR_IO EIO
64
65 static int nfs4_stat_to_errno(int);
66
67 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
68 #ifdef DEBUG
69 #define NFS4_MAXTAGLEN 20
70 #else
71 #define NFS4_MAXTAGLEN 0
72 #endif
73
74 /* lock,open owner id:
75 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
76 */
77 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
78 #define lock_owner_id_maxsz (1 + 1 + 4)
79 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
80 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
81 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
82 #define op_encode_hdr_maxsz (1)
83 #define op_decode_hdr_maxsz (2)
84 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
85 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
86 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
87 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
88 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
89 (NFS4_FHSIZE >> 2))
90 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
91 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
92 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
93 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
94 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
95 ((3+NFS4_FHSIZE) >> 2))
96 #define nfs4_fattr_bitmap_maxsz 4
97 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
98 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
99 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
100 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
101 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
102 /* This is based on getfattr, which uses the most attributes: */
103 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
104 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
105 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
106 nfs4_fattr_value_maxsz)
107 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
108 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
109 1 + 2 + 1 + \
110 nfs4_owner_maxsz + \
111 nfs4_group_maxsz + \
112 4 + 4)
113 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
114 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
115 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
116 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
117 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
118 /* The 5 accounts for the PNFS attributes, and assumes that at most three
119 * layout types will be returned.
120 */
121 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
122 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
123 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
124 #define decode_renew_maxsz (op_decode_hdr_maxsz)
125 #define encode_setclientid_maxsz \
126 (op_encode_hdr_maxsz + \
127 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
128 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
129 1 /* sc_prog */ + \
130 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
131 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
132 1) /* sc_cb_ident */
133 #define decode_setclientid_maxsz \
134 (op_decode_hdr_maxsz + \
135 2 + \
136 1024) /* large value for CLID_INUSE */
137 #define encode_setclientid_confirm_maxsz \
138 (op_encode_hdr_maxsz + \
139 3 + (NFS4_VERIFIER_SIZE >> 2))
140 #define decode_setclientid_confirm_maxsz \
141 (op_decode_hdr_maxsz)
142 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
143 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
144 #define encode_share_access_maxsz \
145 (2)
146 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
147 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
148 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
149 #define encode_open_maxsz (op_encode_hdr_maxsz + \
150 2 + encode_share_access_maxsz + 2 + \
151 open_owner_id_maxsz + \
152 encode_opentype_maxsz + \
153 encode_claim_null_maxsz)
154 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
155 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
156 decode_ace_maxsz)
157 #define decode_change_info_maxsz (5)
158 #define decode_open_maxsz (op_decode_hdr_maxsz + \
159 decode_stateid_maxsz + \
160 decode_change_info_maxsz + 1 + \
161 nfs4_fattr_bitmap_maxsz + \
162 decode_delegation_maxsz)
163 #define encode_open_confirm_maxsz \
164 (op_encode_hdr_maxsz + \
165 encode_stateid_maxsz + 1)
166 #define decode_open_confirm_maxsz \
167 (op_decode_hdr_maxsz + \
168 decode_stateid_maxsz)
169 #define encode_open_downgrade_maxsz \
170 (op_encode_hdr_maxsz + \
171 encode_stateid_maxsz + 1 + \
172 encode_share_access_maxsz)
173 #define decode_open_downgrade_maxsz \
174 (op_decode_hdr_maxsz + \
175 decode_stateid_maxsz)
176 #define encode_close_maxsz (op_encode_hdr_maxsz + \
177 1 + encode_stateid_maxsz)
178 #define decode_close_maxsz (op_decode_hdr_maxsz + \
179 decode_stateid_maxsz)
180 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
181 encode_stateid_maxsz + \
182 encode_attrs_maxsz)
183 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
184 nfs4_fattr_bitmap_maxsz)
185 #define encode_read_maxsz (op_encode_hdr_maxsz + \
186 encode_stateid_maxsz + 3)
187 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
188 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
189 2 + encode_verifier_maxsz + 5)
190 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
191 decode_verifier_maxsz)
192 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
193 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
194 #define encode_write_maxsz (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + 4)
196 #define decode_write_maxsz (op_decode_hdr_maxsz + \
197 2 + decode_verifier_maxsz)
198 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
199 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
200 decode_verifier_maxsz)
201 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
202 nfs4_name_maxsz)
203 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
204 decode_change_info_maxsz)
205 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
206 2 * nfs4_name_maxsz)
207 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
208 decode_change_info_maxsz + \
209 decode_change_info_maxsz)
210 #define encode_link_maxsz (op_encode_hdr_maxsz + \
211 nfs4_name_maxsz)
212 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
213 #define encode_lockowner_maxsz (7)
214 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
215 7 + \
216 1 + encode_stateid_maxsz + 1 + \
217 encode_lockowner_maxsz)
218 #define decode_lock_denied_maxsz \
219 (8 + decode_lockowner_maxsz)
220 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
221 decode_lock_denied_maxsz)
222 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
223 encode_lockowner_maxsz)
224 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
225 decode_lock_denied_maxsz)
226 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
227 encode_stateid_maxsz + \
228 4)
229 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
230 decode_stateid_maxsz)
231 #define encode_release_lockowner_maxsz \
232 (op_encode_hdr_maxsz + \
233 encode_lockowner_maxsz)
234 #define decode_release_lockowner_maxsz \
235 (op_decode_hdr_maxsz)
236 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
237 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
238 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
239 1 + nfs4_name_maxsz + \
240 1 + \
241 nfs4_fattr_maxsz)
242 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
243 #define encode_create_maxsz (op_encode_hdr_maxsz + \
244 1 + 2 + nfs4_name_maxsz + \
245 encode_attrs_maxsz)
246 #define decode_create_maxsz (op_decode_hdr_maxsz + \
247 decode_change_info_maxsz + \
248 nfs4_fattr_bitmap_maxsz)
249 #define encode_statfs_maxsz (encode_getattr_maxsz)
250 #define decode_statfs_maxsz (decode_getattr_maxsz)
251 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
252 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
253 #define encode_getacl_maxsz (encode_getattr_maxsz)
254 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
255 nfs4_fattr_bitmap_maxsz + 1)
256 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
257 encode_stateid_maxsz + 3)
258 #define decode_setacl_maxsz (decode_setattr_maxsz)
259 #define encode_fs_locations_maxsz \
260 (encode_getattr_maxsz)
261 #define decode_fs_locations_maxsz \
262 (0)
263 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
264 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
265
266 #if defined(CONFIG_NFS_V4_1)
267 #define NFS4_MAX_MACHINE_NAME_LEN (64)
268
269 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
270 encode_verifier_maxsz + \
271 1 /* co_ownerid.len */ + \
272 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
273 1 /* flags */ + \
274 1 /* spa_how */ + \
275 0 /* SP4_NONE (for now) */ + \
276 1 /* implementation id array of size 1 */ + \
277 1 /* nii_domain */ + \
278 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
279 1 /* nii_name */ + \
280 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
281 3 /* nii_date */)
282 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
283 2 /* eir_clientid */ + \
284 1 /* eir_sequenceid */ + \
285 1 /* eir_flags */ + \
286 1 /* spr_how */ + \
287 0 /* SP4_NONE (for now) */ + \
288 2 /* eir_server_owner.so_minor_id */ + \
289 /* eir_server_owner.so_major_id<> */ \
290 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
291 /* eir_server_scope<> */ \
292 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
293 1 /* eir_server_impl_id array length */ + \
294 1 /* nii_domain */ + \
295 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
296 1 /* nii_name */ + \
297 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
298 3 /* nii_date */)
299 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
300 #define decode_channel_attrs_maxsz (6 + \
301 1 /* ca_rdma_ird.len */ + \
302 1 /* ca_rdma_ird */)
303 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
304 2 /* csa_clientid */ + \
305 1 /* csa_sequence */ + \
306 1 /* csa_flags */ + \
307 encode_channel_attrs_maxsz + \
308 encode_channel_attrs_maxsz + \
309 1 /* csa_cb_program */ + \
310 1 /* csa_sec_parms.len (1) */ + \
311 1 /* cb_secflavor (AUTH_SYS) */ + \
312 1 /* stamp */ + \
313 1 /* machinename.len */ + \
314 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
315 1 /* uid */ + \
316 1 /* gid */ + \
317 1 /* gids.len (0) */)
318 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
319 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
320 1 /* csr_sequence */ + \
321 1 /* csr_flags */ + \
322 decode_channel_attrs_maxsz + \
323 decode_channel_attrs_maxsz)
324 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
325 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
326 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
327 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
328 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
329 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
330 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
331 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
332 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
333 encode_verifier_maxsz)
334 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
335 2 /* nfs_cookie4 gdlr_cookie */ + \
336 decode_verifier_maxsz \
337 /* verifier4 gdlr_verifier */ + \
338 1 /* gdlr_deviceid_list count */ + \
339 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
340 NFS4_DEVICEID4_SIZE) \
341 /* gdlr_deviceid_list */ + \
342 1 /* bool gdlr_eof */)
343 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
344 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
345 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
346 1 /* layout type */ + \
347 1 /* opaque devaddr4 length */ + \
348 /* devaddr4 payload is read into page */ \
349 1 /* notification bitmap length */ + \
350 1 /* notification bitmap */)
351 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
352 encode_stateid_maxsz)
353 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
354 decode_stateid_maxsz + \
355 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
356 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
357 2 /* offset */ + \
358 2 /* length */ + \
359 1 /* reclaim */ + \
360 encode_stateid_maxsz + \
361 1 /* new offset (true) */ + \
362 2 /* last byte written */ + \
363 1 /* nt_timechanged (false) */ + \
364 1 /* layoutupdate4 layout type */ + \
365 1 /* NULL filelayout layoutupdate4 payload */)
366 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
367 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
368 encode_stateid_maxsz + \
369 1 /* FIXME: opaque lrf_body always empty at the moment */)
370 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
371 1 + decode_stateid_maxsz)
372 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
373 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
374 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
375 XDR_QUADLEN(NFS4_STATEID_SIZE))
376 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
377 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
378 XDR_QUADLEN(NFS4_STATEID_SIZE))
379 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
380 #else /* CONFIG_NFS_V4_1 */
381 #define encode_sequence_maxsz 0
382 #define decode_sequence_maxsz 0
383 #endif /* CONFIG_NFS_V4_1 */
384
385 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
386 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
387 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
388 encode_sequence_maxsz + \
389 encode_putfh_maxsz + \
390 encode_read_maxsz)
391 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
392 decode_sequence_maxsz + \
393 decode_putfh_maxsz + \
394 decode_read_maxsz)
395 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
396 encode_sequence_maxsz + \
397 encode_putfh_maxsz + \
398 encode_readlink_maxsz)
399 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
400 decode_sequence_maxsz + \
401 decode_putfh_maxsz + \
402 decode_readlink_maxsz)
403 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
404 encode_sequence_maxsz + \
405 encode_putfh_maxsz + \
406 encode_readdir_maxsz)
407 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
408 decode_sequence_maxsz + \
409 decode_putfh_maxsz + \
410 decode_readdir_maxsz)
411 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
412 encode_sequence_maxsz + \
413 encode_putfh_maxsz + \
414 encode_write_maxsz + \
415 encode_getattr_maxsz)
416 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
417 decode_sequence_maxsz + \
418 decode_putfh_maxsz + \
419 decode_write_maxsz + \
420 decode_getattr_maxsz)
421 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
422 encode_sequence_maxsz + \
423 encode_putfh_maxsz + \
424 encode_commit_maxsz + \
425 encode_getattr_maxsz)
426 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
427 decode_sequence_maxsz + \
428 decode_putfh_maxsz + \
429 decode_commit_maxsz + \
430 decode_getattr_maxsz)
431 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
432 encode_sequence_maxsz + \
433 encode_putfh_maxsz + \
434 encode_savefh_maxsz + \
435 encode_open_maxsz + \
436 encode_getfh_maxsz + \
437 encode_getattr_maxsz + \
438 encode_restorefh_maxsz + \
439 encode_getattr_maxsz)
440 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
441 decode_sequence_maxsz + \
442 decode_putfh_maxsz + \
443 decode_savefh_maxsz + \
444 decode_open_maxsz + \
445 decode_getfh_maxsz + \
446 decode_getattr_maxsz + \
447 decode_restorefh_maxsz + \
448 decode_getattr_maxsz)
449 #define NFS4_enc_open_confirm_sz \
450 (compound_encode_hdr_maxsz + \
451 encode_putfh_maxsz + \
452 encode_open_confirm_maxsz)
453 #define NFS4_dec_open_confirm_sz \
454 (compound_decode_hdr_maxsz + \
455 decode_putfh_maxsz + \
456 decode_open_confirm_maxsz)
457 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
458 encode_sequence_maxsz + \
459 encode_putfh_maxsz + \
460 encode_open_maxsz + \
461 encode_getattr_maxsz)
462 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
463 decode_sequence_maxsz + \
464 decode_putfh_maxsz + \
465 decode_open_maxsz + \
466 decode_getattr_maxsz)
467 #define NFS4_enc_open_downgrade_sz \
468 (compound_encode_hdr_maxsz + \
469 encode_sequence_maxsz + \
470 encode_putfh_maxsz + \
471 encode_open_downgrade_maxsz + \
472 encode_getattr_maxsz)
473 #define NFS4_dec_open_downgrade_sz \
474 (compound_decode_hdr_maxsz + \
475 decode_sequence_maxsz + \
476 decode_putfh_maxsz + \
477 decode_open_downgrade_maxsz + \
478 decode_getattr_maxsz)
479 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
480 encode_sequence_maxsz + \
481 encode_putfh_maxsz + \
482 encode_close_maxsz + \
483 encode_getattr_maxsz)
484 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
485 decode_sequence_maxsz + \
486 decode_putfh_maxsz + \
487 decode_close_maxsz + \
488 decode_getattr_maxsz)
489 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_setattr_maxsz + \
493 encode_getattr_maxsz)
494 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
495 decode_sequence_maxsz + \
496 decode_putfh_maxsz + \
497 decode_setattr_maxsz + \
498 decode_getattr_maxsz)
499 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
500 encode_sequence_maxsz + \
501 encode_putfh_maxsz + \
502 encode_fsinfo_maxsz)
503 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
504 decode_sequence_maxsz + \
505 decode_putfh_maxsz + \
506 decode_fsinfo_maxsz)
507 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
508 encode_renew_maxsz)
509 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
510 decode_renew_maxsz)
511 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
512 encode_setclientid_maxsz)
513 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
514 decode_setclientid_maxsz)
515 #define NFS4_enc_setclientid_confirm_sz \
516 (compound_encode_hdr_maxsz + \
517 encode_setclientid_confirm_maxsz + \
518 encode_putrootfh_maxsz + \
519 encode_fsinfo_maxsz)
520 #define NFS4_dec_setclientid_confirm_sz \
521 (compound_decode_hdr_maxsz + \
522 decode_setclientid_confirm_maxsz + \
523 decode_putrootfh_maxsz + \
524 decode_fsinfo_maxsz)
525 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_lock_maxsz)
529 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
530 decode_sequence_maxsz + \
531 decode_putfh_maxsz + \
532 decode_lock_maxsz)
533 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
534 encode_sequence_maxsz + \
535 encode_putfh_maxsz + \
536 encode_lockt_maxsz)
537 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
538 decode_sequence_maxsz + \
539 decode_putfh_maxsz + \
540 decode_lockt_maxsz)
541 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
542 encode_sequence_maxsz + \
543 encode_putfh_maxsz + \
544 encode_locku_maxsz)
545 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
546 decode_sequence_maxsz + \
547 decode_putfh_maxsz + \
548 decode_locku_maxsz)
549 #define NFS4_enc_release_lockowner_sz \
550 (compound_encode_hdr_maxsz + \
551 encode_lockowner_maxsz)
552 #define NFS4_dec_release_lockowner_sz \
553 (compound_decode_hdr_maxsz + \
554 decode_lockowner_maxsz)
555 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_access_maxsz + \
559 encode_getattr_maxsz)
560 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
561 decode_sequence_maxsz + \
562 decode_putfh_maxsz + \
563 decode_access_maxsz + \
564 decode_getattr_maxsz)
565 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_getattr_maxsz)
569 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_getattr_maxsz)
573 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_lookup_maxsz + \
577 encode_getattr_maxsz + \
578 encode_getfh_maxsz)
579 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_lookup_maxsz + \
583 decode_getattr_maxsz + \
584 decode_getfh_maxsz)
585 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putrootfh_maxsz + \
588 encode_getattr_maxsz + \
589 encode_getfh_maxsz)
590 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
591 decode_sequence_maxsz + \
592 decode_putrootfh_maxsz + \
593 decode_getattr_maxsz + \
594 decode_getfh_maxsz)
595 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
596 encode_sequence_maxsz + \
597 encode_putfh_maxsz + \
598 encode_remove_maxsz + \
599 encode_getattr_maxsz)
600 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
601 decode_sequence_maxsz + \
602 decode_putfh_maxsz + \
603 decode_remove_maxsz + \
604 decode_getattr_maxsz)
605 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
606 encode_sequence_maxsz + \
607 encode_putfh_maxsz + \
608 encode_savefh_maxsz + \
609 encode_putfh_maxsz + \
610 encode_rename_maxsz + \
611 encode_getattr_maxsz + \
612 encode_restorefh_maxsz + \
613 encode_getattr_maxsz)
614 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
615 decode_sequence_maxsz + \
616 decode_putfh_maxsz + \
617 decode_savefh_maxsz + \
618 decode_putfh_maxsz + \
619 decode_rename_maxsz + \
620 decode_getattr_maxsz + \
621 decode_restorefh_maxsz + \
622 decode_getattr_maxsz)
623 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_savefh_maxsz + \
627 encode_putfh_maxsz + \
628 encode_link_maxsz + \
629 decode_getattr_maxsz + \
630 encode_restorefh_maxsz + \
631 decode_getattr_maxsz)
632 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
633 decode_sequence_maxsz + \
634 decode_putfh_maxsz + \
635 decode_savefh_maxsz + \
636 decode_putfh_maxsz + \
637 decode_link_maxsz + \
638 decode_getattr_maxsz + \
639 decode_restorefh_maxsz + \
640 decode_getattr_maxsz)
641 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_symlink_maxsz + \
645 encode_getattr_maxsz + \
646 encode_getfh_maxsz)
647 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
648 decode_sequence_maxsz + \
649 decode_putfh_maxsz + \
650 decode_symlink_maxsz + \
651 decode_getattr_maxsz + \
652 decode_getfh_maxsz)
653 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
654 encode_sequence_maxsz + \
655 encode_putfh_maxsz + \
656 encode_savefh_maxsz + \
657 encode_create_maxsz + \
658 encode_getfh_maxsz + \
659 encode_getattr_maxsz + \
660 encode_restorefh_maxsz + \
661 encode_getattr_maxsz)
662 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
663 decode_sequence_maxsz + \
664 decode_putfh_maxsz + \
665 decode_savefh_maxsz + \
666 decode_create_maxsz + \
667 decode_getfh_maxsz + \
668 decode_getattr_maxsz + \
669 decode_restorefh_maxsz + \
670 decode_getattr_maxsz)
671 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
672 encode_sequence_maxsz + \
673 encode_putfh_maxsz + \
674 encode_getattr_maxsz)
675 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_getattr_maxsz)
679 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
680 encode_sequence_maxsz + \
681 encode_putfh_maxsz + \
682 encode_statfs_maxsz)
683 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
684 decode_sequence_maxsz + \
685 decode_putfh_maxsz + \
686 decode_statfs_maxsz)
687 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
688 encode_sequence_maxsz + \
689 encode_putfh_maxsz + \
690 encode_getattr_maxsz)
691 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
692 decode_sequence_maxsz + \
693 decode_putfh_maxsz + \
694 decode_getattr_maxsz)
695 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
696 encode_sequence_maxsz + \
697 encode_putfh_maxsz + \
698 encode_delegreturn_maxsz + \
699 encode_getattr_maxsz)
700 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
701 decode_sequence_maxsz + \
702 decode_delegreturn_maxsz + \
703 decode_getattr_maxsz)
704 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
705 encode_sequence_maxsz + \
706 encode_putfh_maxsz + \
707 encode_getacl_maxsz)
708 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
709 decode_sequence_maxsz + \
710 decode_putfh_maxsz + \
711 decode_getacl_maxsz)
712 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
713 encode_sequence_maxsz + \
714 encode_putfh_maxsz + \
715 encode_setacl_maxsz)
716 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
717 decode_sequence_maxsz + \
718 decode_putfh_maxsz + \
719 decode_setacl_maxsz)
720 #define NFS4_enc_fs_locations_sz \
721 (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_lookup_maxsz + \
725 encode_fs_locations_maxsz)
726 #define NFS4_dec_fs_locations_sz \
727 (compound_decode_hdr_maxsz + \
728 decode_sequence_maxsz + \
729 decode_putfh_maxsz + \
730 decode_lookup_maxsz + \
731 decode_fs_locations_maxsz)
732 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
733 encode_sequence_maxsz + \
734 encode_putfh_maxsz + \
735 encode_secinfo_maxsz)
736 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
737 decode_sequence_maxsz + \
738 decode_putfh_maxsz + \
739 decode_secinfo_maxsz)
740 #if defined(CONFIG_NFS_V4_1)
741 #define NFS4_enc_exchange_id_sz \
742 (compound_encode_hdr_maxsz + \
743 encode_exchange_id_maxsz)
744 #define NFS4_dec_exchange_id_sz \
745 (compound_decode_hdr_maxsz + \
746 decode_exchange_id_maxsz)
747 #define NFS4_enc_create_session_sz \
748 (compound_encode_hdr_maxsz + \
749 encode_create_session_maxsz)
750 #define NFS4_dec_create_session_sz \
751 (compound_decode_hdr_maxsz + \
752 decode_create_session_maxsz)
753 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
754 encode_destroy_session_maxsz)
755 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
756 decode_destroy_session_maxsz)
757 #define NFS4_enc_sequence_sz \
758 (compound_decode_hdr_maxsz + \
759 encode_sequence_maxsz)
760 #define NFS4_dec_sequence_sz \
761 (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz)
763 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
764 encode_sequence_maxsz + \
765 encode_putrootfh_maxsz + \
766 encode_fsinfo_maxsz)
767 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
768 decode_sequence_maxsz + \
769 decode_putrootfh_maxsz + \
770 decode_fsinfo_maxsz)
771 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
772 encode_sequence_maxsz + \
773 encode_reclaim_complete_maxsz)
774 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
775 decode_sequence_maxsz + \
776 decode_reclaim_complete_maxsz)
777 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
778 encode_sequence_maxsz + \
779 encode_putfh_maxsz + \
780 encode_getdevicelist_maxsz)
781 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
782 decode_sequence_maxsz + \
783 decode_putfh_maxsz + \
784 decode_getdevicelist_maxsz)
785 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
786 encode_sequence_maxsz +\
787 encode_getdeviceinfo_maxsz)
788 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
789 decode_sequence_maxsz + \
790 decode_getdeviceinfo_maxsz)
791 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
792 encode_sequence_maxsz + \
793 encode_putfh_maxsz + \
794 encode_layoutget_maxsz)
795 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
796 decode_sequence_maxsz + \
797 decode_putfh_maxsz + \
798 decode_layoutget_maxsz)
799 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
800 encode_sequence_maxsz +\
801 encode_putfh_maxsz + \
802 encode_layoutcommit_maxsz + \
803 encode_getattr_maxsz)
804 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
805 decode_sequence_maxsz + \
806 decode_putfh_maxsz + \
807 decode_layoutcommit_maxsz + \
808 decode_getattr_maxsz)
809 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
810 encode_sequence_maxsz + \
811 encode_putfh_maxsz + \
812 encode_layoutreturn_maxsz)
813 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
814 decode_sequence_maxsz + \
815 decode_putfh_maxsz + \
816 decode_layoutreturn_maxsz)
817 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
818 encode_sequence_maxsz + \
819 encode_putrootfh_maxsz +\
820 encode_secinfo_no_name_maxsz)
821 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
822 decode_sequence_maxsz + \
823 decode_putrootfh_maxsz + \
824 decode_secinfo_no_name_maxsz)
825 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
826 encode_sequence_maxsz + \
827 encode_test_stateid_maxsz)
828 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
829 decode_sequence_maxsz + \
830 decode_test_stateid_maxsz)
831 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
832 encode_sequence_maxsz + \
833 encode_free_stateid_maxsz)
834 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
835 decode_sequence_maxsz + \
836 decode_free_stateid_maxsz)
837
838 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
839 compound_encode_hdr_maxsz +
840 encode_sequence_maxsz +
841 encode_putfh_maxsz +
842 encode_getattr_maxsz) *
843 XDR_UNIT);
844
845 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
846 compound_decode_hdr_maxsz +
847 decode_sequence_maxsz +
848 decode_putfh_maxsz) *
849 XDR_UNIT);
850 #endif /* CONFIG_NFS_V4_1 */
851
852 static unsigned short send_implementation_id = 1;
853
854 module_param(send_implementation_id, ushort, 0644);
855 MODULE_PARM_DESC(send_implementation_id,
856 "Send implementation ID with NFSv4.1 exchange_id");
857
858 static const umode_t nfs_type2fmt[] = {
859 [NF4BAD] = 0,
860 [NF4REG] = S_IFREG,
861 [NF4DIR] = S_IFDIR,
862 [NF4BLK] = S_IFBLK,
863 [NF4CHR] = S_IFCHR,
864 [NF4LNK] = S_IFLNK,
865 [NF4SOCK] = S_IFSOCK,
866 [NF4FIFO] = S_IFIFO,
867 [NF4ATTRDIR] = 0,
868 [NF4NAMEDATTR] = 0,
869 };
870
871 struct compound_hdr {
872 int32_t status;
873 uint32_t nops;
874 __be32 * nops_p;
875 uint32_t taglen;
876 char * tag;
877 uint32_t replen; /* expected reply words */
878 u32 minorversion;
879 };
880
881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
882 {
883 __be32 *p = xdr_reserve_space(xdr, nbytes);
884 BUG_ON(!p);
885 return p;
886 }
887
888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
889 {
890 __be32 *p;
891
892 p = xdr_reserve_space(xdr, len);
893 xdr_encode_opaque_fixed(p, buf, len);
894 }
895
896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
897 {
898 __be32 *p;
899
900 p = reserve_space(xdr, 4 + len);
901 xdr_encode_opaque(p, str, len);
902 }
903
904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
905 {
906 __be32 *p;
907
908 p = reserve_space(xdr, 4);
909 *p = cpu_to_be32(n);
910 }
911
912 static void encode_uint64(struct xdr_stream *xdr, u64 n)
913 {
914 __be32 *p;
915
916 p = reserve_space(xdr, 8);
917 xdr_encode_hyper(p, n);
918 }
919
920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
921 const struct nfs_seqid *seqid)
922 {
923 encode_uint32(xdr, seqid->sequence->counter);
924 }
925
926 static void encode_compound_hdr(struct xdr_stream *xdr,
927 struct rpc_rqst *req,
928 struct compound_hdr *hdr)
929 {
930 __be32 *p;
931 struct rpc_auth *auth = req->rq_cred->cr_auth;
932
933 /* initialize running count of expected bytes in reply.
934 * NOTE: the replied tag SHOULD be the same is the one sent,
935 * but this is not required as a MUST for the server to do so. */
936 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
937
938 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
939 encode_string(xdr, hdr->taglen, hdr->tag);
940 p = reserve_space(xdr, 8);
941 *p++ = cpu_to_be32(hdr->minorversion);
942 hdr->nops_p = p;
943 *p = cpu_to_be32(hdr->nops);
944 }
945
946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
947 uint32_t replen,
948 struct compound_hdr *hdr)
949 {
950 encode_uint32(xdr, op);
951 hdr->nops++;
952 hdr->replen += replen;
953 }
954
955 static void encode_nops(struct compound_hdr *hdr)
956 {
957 BUG_ON(hdr->nops > NFS4_MAX_OPS);
958 *hdr->nops_p = htonl(hdr->nops);
959 }
960
961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
962 {
963 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
964 }
965
966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
967 {
968 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
969 }
970
971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
972 {
973 char owner_name[IDMAP_NAMESZ];
974 char owner_group[IDMAP_NAMESZ];
975 int owner_namelen = 0;
976 int owner_grouplen = 0;
977 __be32 *p;
978 __be32 *q;
979 int len;
980 uint32_t bmval0 = 0;
981 uint32_t bmval1 = 0;
982
983 /*
984 * We reserve enough space to write the entire attribute buffer at once.
985 * In the worst-case, this would be
986 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
987 * = 36 bytes, plus any contribution from variable-length fields
988 * such as owner/group.
989 */
990 len = 16;
991
992 /* Sigh */
993 if (iap->ia_valid & ATTR_SIZE)
994 len += 8;
995 if (iap->ia_valid & ATTR_MODE)
996 len += 4;
997 if (iap->ia_valid & ATTR_UID) {
998 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
999 if (owner_namelen < 0) {
1000 dprintk("nfs: couldn't resolve uid %d to string\n",
1001 iap->ia_uid);
1002 /* XXX */
1003 strcpy(owner_name, "nobody");
1004 owner_namelen = sizeof("nobody") - 1;
1005 /* goto out; */
1006 }
1007 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008 }
1009 if (iap->ia_valid & ATTR_GID) {
1010 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011 if (owner_grouplen < 0) {
1012 dprintk("nfs: couldn't resolve gid %d to string\n",
1013 iap->ia_gid);
1014 strcpy(owner_group, "nobody");
1015 owner_grouplen = sizeof("nobody") - 1;
1016 /* goto out; */
1017 }
1018 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019 }
1020 if (iap->ia_valid & ATTR_ATIME_SET)
1021 len += 16;
1022 else if (iap->ia_valid & ATTR_ATIME)
1023 len += 4;
1024 if (iap->ia_valid & ATTR_MTIME_SET)
1025 len += 16;
1026 else if (iap->ia_valid & ATTR_MTIME)
1027 len += 4;
1028 p = reserve_space(xdr, len);
1029
1030 /*
1031 * We write the bitmap length now, but leave the bitmap and the attribute
1032 * buffer length to be backfilled at the end of this routine.
1033 */
1034 *p++ = cpu_to_be32(2);
1035 q = p;
1036 p += 3;
1037
1038 if (iap->ia_valid & ATTR_SIZE) {
1039 bmval0 |= FATTR4_WORD0_SIZE;
1040 p = xdr_encode_hyper(p, iap->ia_size);
1041 }
1042 if (iap->ia_valid & ATTR_MODE) {
1043 bmval1 |= FATTR4_WORD1_MODE;
1044 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045 }
1046 if (iap->ia_valid & ATTR_UID) {
1047 bmval1 |= FATTR4_WORD1_OWNER;
1048 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049 }
1050 if (iap->ia_valid & ATTR_GID) {
1051 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053 }
1054 if (iap->ia_valid & ATTR_ATIME_SET) {
1055 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057 *p++ = cpu_to_be32(0);
1058 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1059 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1060 }
1061 else if (iap->ia_valid & ATTR_ATIME) {
1062 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1063 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1064 }
1065 if (iap->ia_valid & ATTR_MTIME_SET) {
1066 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1067 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1068 *p++ = cpu_to_be32(0);
1069 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1070 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1071 }
1072 else if (iap->ia_valid & ATTR_MTIME) {
1073 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1074 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1075 }
1076
1077 /*
1078 * Now we backfill the bitmap and the attribute buffer length.
1079 */
1080 if (len != ((char *)p - (char *)q) + 4) {
1081 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1082 len, ((char *)p - (char *)q) + 4);
1083 BUG();
1084 }
1085 len = (char *)p - (char *)q - 12;
1086 *q++ = htonl(bmval0);
1087 *q++ = htonl(bmval1);
1088 *q = htonl(len);
1089
1090 /* out: */
1091 }
1092
1093 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1094 {
1095 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1096 encode_uint32(xdr, access);
1097 }
1098
1099 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1100 {
1101 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1102 encode_nfs4_seqid(xdr, arg->seqid);
1103 encode_nfs4_stateid(xdr, arg->stateid);
1104 }
1105
1106 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1107 {
1108 __be32 *p;
1109
1110 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1111 p = reserve_space(xdr, 12);
1112 p = xdr_encode_hyper(p, args->offset);
1113 *p = cpu_to_be32(args->count);
1114 }
1115
1116 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1117 {
1118 __be32 *p;
1119
1120 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1121 encode_uint32(xdr, create->ftype);
1122
1123 switch (create->ftype) {
1124 case NF4LNK:
1125 p = reserve_space(xdr, 4);
1126 *p = cpu_to_be32(create->u.symlink.len);
1127 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1128 break;
1129
1130 case NF4BLK: case NF4CHR:
1131 p = reserve_space(xdr, 8);
1132 *p++ = cpu_to_be32(create->u.device.specdata1);
1133 *p = cpu_to_be32(create->u.device.specdata2);
1134 break;
1135
1136 default:
1137 break;
1138 }
1139
1140 encode_string(xdr, create->name->len, create->name->name);
1141 encode_attrs(xdr, create->attrs, create->server);
1142 }
1143
1144 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1145 {
1146 __be32 *p;
1147
1148 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1149 p = reserve_space(xdr, 8);
1150 *p++ = cpu_to_be32(1);
1151 *p = cpu_to_be32(bitmap);
1152 }
1153
1154 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1155 {
1156 __be32 *p;
1157
1158 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1159 p = reserve_space(xdr, 12);
1160 *p++ = cpu_to_be32(2);
1161 *p++ = cpu_to_be32(bm0);
1162 *p = cpu_to_be32(bm1);
1163 }
1164
1165 static void
1166 encode_getattr_three(struct xdr_stream *xdr,
1167 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1168 struct compound_hdr *hdr)
1169 {
1170 __be32 *p;
1171
1172 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1173 if (bm2) {
1174 p = reserve_space(xdr, 16);
1175 *p++ = cpu_to_be32(3);
1176 *p++ = cpu_to_be32(bm0);
1177 *p++ = cpu_to_be32(bm1);
1178 *p = cpu_to_be32(bm2);
1179 } else if (bm1) {
1180 p = reserve_space(xdr, 12);
1181 *p++ = cpu_to_be32(2);
1182 *p++ = cpu_to_be32(bm0);
1183 *p = cpu_to_be32(bm1);
1184 } else {
1185 p = reserve_space(xdr, 8);
1186 *p++ = cpu_to_be32(1);
1187 *p = cpu_to_be32(bm0);
1188 }
1189 }
1190
1191 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1192 {
1193 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1194 bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1195 }
1196
1197 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1198 {
1199 encode_getattr_three(xdr,
1200 bitmask[0] & nfs4_fsinfo_bitmap[0],
1201 bitmask[1] & nfs4_fsinfo_bitmap[1],
1202 bitmask[2] & nfs4_fsinfo_bitmap[2],
1203 hdr);
1204 }
1205
1206 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1207 {
1208 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1209 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1210 }
1211
1212 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1213 {
1214 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1215 }
1216
1217 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1218 {
1219 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1220 encode_string(xdr, name->len, name->name);
1221 }
1222
1223 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1224 {
1225 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1226 return block ? NFS4_READW_LT : NFS4_READ_LT;
1227 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1228 }
1229
1230 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1231 {
1232 if (fl->fl_end == OFFSET_MAX)
1233 return ~(uint64_t)0;
1234 return fl->fl_end - fl->fl_start + 1;
1235 }
1236
1237 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1238 {
1239 __be32 *p;
1240
1241 p = reserve_space(xdr, 32);
1242 p = xdr_encode_hyper(p, lowner->clientid);
1243 *p++ = cpu_to_be32(20);
1244 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1245 *p++ = cpu_to_be32(lowner->s_dev);
1246 xdr_encode_hyper(p, lowner->id);
1247 }
1248
1249 /*
1250 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1251 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1252 */
1253 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1254 {
1255 __be32 *p;
1256
1257 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1258 p = reserve_space(xdr, 28);
1259 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1260 *p++ = cpu_to_be32(args->reclaim);
1261 p = xdr_encode_hyper(p, args->fl->fl_start);
1262 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1263 *p = cpu_to_be32(args->new_lock_owner);
1264 if (args->new_lock_owner){
1265 encode_nfs4_seqid(xdr, args->open_seqid);
1266 encode_nfs4_stateid(xdr, args->open_stateid);
1267 encode_nfs4_seqid(xdr, args->lock_seqid);
1268 encode_lockowner(xdr, &args->lock_owner);
1269 }
1270 else {
1271 encode_nfs4_stateid(xdr, args->lock_stateid);
1272 encode_nfs4_seqid(xdr, args->lock_seqid);
1273 }
1274 }
1275
1276 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1277 {
1278 __be32 *p;
1279
1280 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1281 p = reserve_space(xdr, 20);
1282 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1283 p = xdr_encode_hyper(p, args->fl->fl_start);
1284 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1285 encode_lockowner(xdr, &args->lock_owner);
1286 }
1287
1288 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1289 {
1290 __be32 *p;
1291
1292 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1293 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1294 encode_nfs4_seqid(xdr, args->seqid);
1295 encode_nfs4_stateid(xdr, args->stateid);
1296 p = reserve_space(xdr, 16);
1297 p = xdr_encode_hyper(p, args->fl->fl_start);
1298 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 }
1300
1301 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1302 {
1303 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1304 encode_lockowner(xdr, lowner);
1305 }
1306
1307 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1308 {
1309 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1310 encode_string(xdr, name->len, name->name);
1311 }
1312
1313 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1314 {
1315 __be32 *p;
1316
1317 p = reserve_space(xdr, 8);
1318 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1319 case FMODE_READ:
1320 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1321 break;
1322 case FMODE_WRITE:
1323 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1324 break;
1325 case FMODE_READ|FMODE_WRITE:
1326 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1327 break;
1328 default:
1329 *p++ = cpu_to_be32(0);
1330 }
1331 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1332 }
1333
1334 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1335 {
1336 __be32 *p;
1337 /*
1338 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1339 * owner 4 = 32
1340 */
1341 encode_nfs4_seqid(xdr, arg->seqid);
1342 encode_share_access(xdr, arg->fmode);
1343 p = reserve_space(xdr, 36);
1344 p = xdr_encode_hyper(p, arg->clientid);
1345 *p++ = cpu_to_be32(24);
1346 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1347 *p++ = cpu_to_be32(arg->server->s_dev);
1348 *p++ = cpu_to_be32(arg->id.uniquifier);
1349 xdr_encode_hyper(p, arg->id.create_time);
1350 }
1351
1352 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1353 {
1354 __be32 *p;
1355 struct nfs_client *clp;
1356
1357 p = reserve_space(xdr, 4);
1358 switch(arg->open_flags & O_EXCL) {
1359 case 0:
1360 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1361 encode_attrs(xdr, arg->u.attrs, arg->server);
1362 break;
1363 default:
1364 clp = arg->server->nfs_client;
1365 if (clp->cl_mvops->minor_version > 0) {
1366 if (nfs4_has_persistent_session(clp)) {
1367 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1368 encode_attrs(xdr, arg->u.attrs, arg->server);
1369 } else {
1370 struct iattr dummy;
1371
1372 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1373 encode_nfs4_verifier(xdr, &arg->u.verifier);
1374 dummy.ia_valid = 0;
1375 encode_attrs(xdr, &dummy, arg->server);
1376 }
1377 } else {
1378 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1379 encode_nfs4_verifier(xdr, &arg->u.verifier);
1380 }
1381 }
1382 }
1383
1384 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1385 {
1386 __be32 *p;
1387
1388 p = reserve_space(xdr, 4);
1389 switch (arg->open_flags & O_CREAT) {
1390 case 0:
1391 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1392 break;
1393 default:
1394 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1395 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1396 encode_createmode(xdr, arg);
1397 }
1398 }
1399
1400 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1401 {
1402 __be32 *p;
1403
1404 p = reserve_space(xdr, 4);
1405 switch (delegation_type) {
1406 case 0:
1407 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1408 break;
1409 case FMODE_READ:
1410 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1411 break;
1412 case FMODE_WRITE|FMODE_READ:
1413 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1414 break;
1415 default:
1416 BUG();
1417 }
1418 }
1419
1420 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1421 {
1422 __be32 *p;
1423
1424 p = reserve_space(xdr, 4);
1425 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1426 encode_string(xdr, name->len, name->name);
1427 }
1428
1429 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1430 {
1431 __be32 *p;
1432
1433 p = reserve_space(xdr, 4);
1434 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1435 encode_delegation_type(xdr, type);
1436 }
1437
1438 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1439 {
1440 __be32 *p;
1441
1442 p = reserve_space(xdr, 4);
1443 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1444 encode_nfs4_stateid(xdr, stateid);
1445 encode_string(xdr, name->len, name->name);
1446 }
1447
1448 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1449 {
1450 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1451 encode_openhdr(xdr, arg);
1452 encode_opentype(xdr, arg);
1453 switch (arg->claim) {
1454 case NFS4_OPEN_CLAIM_NULL:
1455 encode_claim_null(xdr, arg->name);
1456 break;
1457 case NFS4_OPEN_CLAIM_PREVIOUS:
1458 encode_claim_previous(xdr, arg->u.delegation_type);
1459 break;
1460 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1461 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1462 break;
1463 default:
1464 BUG();
1465 }
1466 }
1467
1468 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1469 {
1470 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1471 encode_nfs4_stateid(xdr, arg->stateid);
1472 encode_nfs4_seqid(xdr, arg->seqid);
1473 }
1474
1475 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1476 {
1477 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1478 encode_nfs4_stateid(xdr, arg->stateid);
1479 encode_nfs4_seqid(xdr, arg->seqid);
1480 encode_share_access(xdr, arg->fmode);
1481 }
1482
1483 static void
1484 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1485 {
1486 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1487 encode_string(xdr, fh->size, fh->data);
1488 }
1489
1490 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1491 {
1492 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1493 }
1494
1495 static void encode_open_stateid(struct xdr_stream *xdr,
1496 const struct nfs_open_context *ctx,
1497 const struct nfs_lock_context *l_ctx,
1498 fmode_t fmode,
1499 int zero_seqid)
1500 {
1501 nfs4_stateid stateid;
1502
1503 if (ctx->state != NULL) {
1504 nfs4_select_rw_stateid(&stateid, ctx->state,
1505 fmode, l_ctx->lockowner, l_ctx->pid);
1506 if (zero_seqid)
1507 stateid.seqid = 0;
1508 encode_nfs4_stateid(xdr, &stateid);
1509 } else
1510 encode_nfs4_stateid(xdr, &zero_stateid);
1511 }
1512
1513 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1514 {
1515 __be32 *p;
1516
1517 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1518 encode_open_stateid(xdr, args->context, args->lock_context,
1519 FMODE_READ, hdr->minorversion);
1520
1521 p = reserve_space(xdr, 12);
1522 p = xdr_encode_hyper(p, args->offset);
1523 *p = cpu_to_be32(args->count);
1524 }
1525
1526 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1527 {
1528 uint32_t attrs[2] = {
1529 FATTR4_WORD0_RDATTR_ERROR,
1530 FATTR4_WORD1_MOUNTED_ON_FILEID,
1531 };
1532 uint32_t dircount = readdir->count >> 1;
1533 __be32 *p, verf[2];
1534
1535 if (readdir->plus) {
1536 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1537 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1538 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1539 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1540 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1541 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1542 dircount >>= 1;
1543 }
1544 /* Use mounted_on_fileid only if the server supports it */
1545 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1546 attrs[0] |= FATTR4_WORD0_FILEID;
1547
1548 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1549 encode_uint64(xdr, readdir->cookie);
1550 encode_nfs4_verifier(xdr, &readdir->verifier);
1551 p = reserve_space(xdr, 20);
1552 *p++ = cpu_to_be32(dircount);
1553 *p++ = cpu_to_be32(readdir->count);
1554 *p++ = cpu_to_be32(2);
1555
1556 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1557 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1558 memcpy(verf, readdir->verifier.data, sizeof(verf));
1559 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1560 __func__,
1561 (unsigned long long)readdir->cookie,
1562 verf[0], verf[1],
1563 attrs[0] & readdir->bitmask[0],
1564 attrs[1] & readdir->bitmask[1]);
1565 }
1566
1567 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1568 {
1569 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1570 }
1571
1572 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1573 {
1574 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1575 encode_string(xdr, name->len, name->name);
1576 }
1577
1578 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1579 {
1580 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1581 encode_string(xdr, oldname->len, oldname->name);
1582 encode_string(xdr, newname->len, newname->name);
1583 }
1584
1585 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1586 struct compound_hdr *hdr)
1587 {
1588 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1589 encode_uint64(xdr, clid);
1590 }
1591
1592 static void
1593 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1594 {
1595 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1596 }
1597
1598 static void
1599 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1600 {
1601 __be32 *p;
1602
1603 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1604 encode_nfs4_stateid(xdr, &zero_stateid);
1605 p = reserve_space(xdr, 2*4);
1606 *p++ = cpu_to_be32(1);
1607 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1608 BUG_ON(arg->acl_len % 4);
1609 p = reserve_space(xdr, 4);
1610 *p = cpu_to_be32(arg->acl_len);
1611 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1612 }
1613
1614 static void
1615 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1616 {
1617 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1618 }
1619
1620 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1621 {
1622 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1623 encode_nfs4_stateid(xdr, &arg->stateid);
1624 encode_attrs(xdr, arg->iap, server);
1625 }
1626
1627 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1628 {
1629 __be32 *p;
1630
1631 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1632 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1633
1634 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1635 p = reserve_space(xdr, 4);
1636 *p = cpu_to_be32(setclientid->sc_prog);
1637 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1638 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1639 p = reserve_space(xdr, 4);
1640 *p = cpu_to_be32(setclientid->sc_cb_ident);
1641 }
1642
1643 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1644 {
1645 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1646 decode_setclientid_confirm_maxsz, hdr);
1647 encode_uint64(xdr, arg->clientid);
1648 encode_nfs4_verifier(xdr, &arg->confirm);
1649 }
1650
1651 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1652 {
1653 __be32 *p;
1654
1655 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1656 encode_open_stateid(xdr, args->context, args->lock_context,
1657 FMODE_WRITE, hdr->minorversion);
1658
1659 p = reserve_space(xdr, 16);
1660 p = xdr_encode_hyper(p, args->offset);
1661 *p++ = cpu_to_be32(args->stable);
1662 *p = cpu_to_be32(args->count);
1663
1664 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1665 }
1666
1667 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1670 encode_nfs4_stateid(xdr, stateid);
1671 }
1672
1673 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1674 {
1675 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1676 encode_string(xdr, name->len, name->name);
1677 }
1678
1679 #if defined(CONFIG_NFS_V4_1)
1680 /* NFSv4.1 operations */
1681 static void encode_exchange_id(struct xdr_stream *xdr,
1682 struct nfs41_exchange_id_args *args,
1683 struct compound_hdr *hdr)
1684 {
1685 __be32 *p;
1686 char impl_name[NFS4_OPAQUE_LIMIT];
1687 int len = 0;
1688
1689 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1690 encode_nfs4_verifier(xdr, args->verifier);
1691
1692 encode_string(xdr, args->id_len, args->id);
1693
1694 p = reserve_space(xdr, 12);
1695 *p++ = cpu_to_be32(args->flags);
1696 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1697
1698 if (send_implementation_id &&
1699 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1700 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1701 <= NFS4_OPAQUE_LIMIT + 1)
1702 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1703 utsname()->sysname, utsname()->release,
1704 utsname()->version, utsname()->machine);
1705
1706 if (len > 0) {
1707 *p = cpu_to_be32(1); /* implementation id array length=1 */
1708
1709 encode_string(xdr,
1710 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1711 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1712 encode_string(xdr, len, impl_name);
1713 /* just send zeros for nii_date - the date is in nii_name */
1714 p = reserve_space(xdr, 12);
1715 p = xdr_encode_hyper(p, 0);
1716 *p = cpu_to_be32(0);
1717 } else
1718 *p = cpu_to_be32(0); /* implementation id array length=0 */
1719 }
1720
1721 static void encode_create_session(struct xdr_stream *xdr,
1722 struct nfs41_create_session_args *args,
1723 struct compound_hdr *hdr)
1724 {
1725 __be32 *p;
1726 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1727 uint32_t len;
1728 struct nfs_client *clp = args->client;
1729 u32 max_resp_sz_cached;
1730
1731 /*
1732 * Assumes OPEN is the biggest non-idempotent compound.
1733 * 2 is the verifier.
1734 */
1735 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1736 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1737
1738 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1739 clp->cl_ipaddr);
1740
1741 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1742 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1743 p = xdr_encode_hyper(p, clp->cl_clientid);
1744 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1745 *p++ = cpu_to_be32(args->flags); /*flags */
1746
1747 /* Fore Channel */
1748 *p++ = cpu_to_be32(0); /* header padding size */
1749 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1750 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1751 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1752 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1753 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1754 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1755
1756 /* Back Channel */
1757 *p++ = cpu_to_be32(0); /* header padding size */
1758 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1759 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1760 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1761 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1762 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1763 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1764
1765 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1766 *p++ = cpu_to_be32(1);
1767 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1768
1769 /* authsys_parms rfc1831 */
1770 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */
1771 p = xdr_encode_opaque(p, machine_name, len);
1772 *p++ = cpu_to_be32(0); /* UID */
1773 *p++ = cpu_to_be32(0); /* GID */
1774 *p = cpu_to_be32(0); /* No more gids */
1775 }
1776
1777 static void encode_destroy_session(struct xdr_stream *xdr,
1778 struct nfs4_session *session,
1779 struct compound_hdr *hdr)
1780 {
1781 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1782 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1783 }
1784
1785 static void encode_reclaim_complete(struct xdr_stream *xdr,
1786 struct nfs41_reclaim_complete_args *args,
1787 struct compound_hdr *hdr)
1788 {
1789 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1790 encode_uint32(xdr, args->one_fs);
1791 }
1792 #endif /* CONFIG_NFS_V4_1 */
1793
1794 static void encode_sequence(struct xdr_stream *xdr,
1795 const struct nfs4_sequence_args *args,
1796 struct compound_hdr *hdr)
1797 {
1798 #if defined(CONFIG_NFS_V4_1)
1799 struct nfs4_session *session = args->sa_session;
1800 struct nfs4_slot_table *tp;
1801 struct nfs4_slot *slot;
1802 __be32 *p;
1803
1804 if (!session)
1805 return;
1806
1807 tp = &session->fc_slot_table;
1808
1809 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1810 slot = tp->slots + args->sa_slotid;
1811
1812 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1813
1814 /*
1815 * Sessionid + seqid + slotid + max slotid + cache_this
1816 */
1817 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1818 "max_slotid=%d cache_this=%d\n",
1819 __func__,
1820 ((u32 *)session->sess_id.data)[0],
1821 ((u32 *)session->sess_id.data)[1],
1822 ((u32 *)session->sess_id.data)[2],
1823 ((u32 *)session->sess_id.data)[3],
1824 slot->seq_nr, args->sa_slotid,
1825 tp->highest_used_slotid, args->sa_cache_this);
1826 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1827 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1828 *p++ = cpu_to_be32(slot->seq_nr);
1829 *p++ = cpu_to_be32(args->sa_slotid);
1830 *p++ = cpu_to_be32(tp->highest_used_slotid);
1831 *p = cpu_to_be32(args->sa_cache_this);
1832 #endif /* CONFIG_NFS_V4_1 */
1833 }
1834
1835 #ifdef CONFIG_NFS_V4_1
1836 static void
1837 encode_getdevicelist(struct xdr_stream *xdr,
1838 const struct nfs4_getdevicelist_args *args,
1839 struct compound_hdr *hdr)
1840 {
1841 __be32 *p;
1842 nfs4_verifier dummy = {
1843 .data = "dummmmmy",
1844 };
1845
1846 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1847 p = reserve_space(xdr, 16);
1848 *p++ = cpu_to_be32(args->layoutclass);
1849 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1850 xdr_encode_hyper(p, 0ULL); /* cookie */
1851 encode_nfs4_verifier(xdr, &dummy);
1852 }
1853
1854 static void
1855 encode_getdeviceinfo(struct xdr_stream *xdr,
1856 const struct nfs4_getdeviceinfo_args *args,
1857 struct compound_hdr *hdr)
1858 {
1859 __be32 *p;
1860
1861 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1862 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1863 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1864 NFS4_DEVICEID4_SIZE);
1865 *p++ = cpu_to_be32(args->pdev->layout_type);
1866 *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */
1867 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1868 }
1869
1870 static void
1871 encode_layoutget(struct xdr_stream *xdr,
1872 const struct nfs4_layoutget_args *args,
1873 struct compound_hdr *hdr)
1874 {
1875 __be32 *p;
1876
1877 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1878 p = reserve_space(xdr, 36);
1879 *p++ = cpu_to_be32(0); /* Signal layout available */
1880 *p++ = cpu_to_be32(args->type);
1881 *p++ = cpu_to_be32(args->range.iomode);
1882 p = xdr_encode_hyper(p, args->range.offset);
1883 p = xdr_encode_hyper(p, args->range.length);
1884 p = xdr_encode_hyper(p, args->minlength);
1885 encode_nfs4_stateid(xdr, &args->stateid);
1886 encode_uint32(xdr, args->maxcount);
1887
1888 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1889 __func__,
1890 args->type,
1891 args->range.iomode,
1892 (unsigned long)args->range.offset,
1893 (unsigned long)args->range.length,
1894 args->maxcount);
1895 }
1896
1897 static int
1898 encode_layoutcommit(struct xdr_stream *xdr,
1899 struct inode *inode,
1900 const struct nfs4_layoutcommit_args *args,
1901 struct compound_hdr *hdr)
1902 {
1903 __be32 *p;
1904
1905 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1906 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1907
1908 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1909 p = reserve_space(xdr, 20);
1910 /* Only whole file layouts */
1911 p = xdr_encode_hyper(p, 0); /* offset */
1912 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1913 *p = cpu_to_be32(0); /* reclaim */
1914 encode_nfs4_stateid(xdr, &args->stateid);
1915 p = reserve_space(xdr, 20);
1916 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1917 p = xdr_encode_hyper(p, args->lastbytewritten);
1918 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1919 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1920
1921 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1922 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1923 NFS_I(inode)->layout, xdr, args);
1924 else
1925 encode_uint32(xdr, 0); /* no layout-type payload */
1926
1927 return 0;
1928 }
1929
1930 static void
1931 encode_layoutreturn(struct xdr_stream *xdr,
1932 const struct nfs4_layoutreturn_args *args,
1933 struct compound_hdr *hdr)
1934 {
1935 __be32 *p;
1936
1937 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1938 p = reserve_space(xdr, 16);
1939 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
1940 *p++ = cpu_to_be32(args->layout_type);
1941 *p++ = cpu_to_be32(IOMODE_ANY);
1942 *p = cpu_to_be32(RETURN_FILE);
1943 p = reserve_space(xdr, 16);
1944 p = xdr_encode_hyper(p, 0);
1945 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1946 spin_lock(&args->inode->i_lock);
1947 encode_nfs4_stateid(xdr, &args->stateid);
1948 spin_unlock(&args->inode->i_lock);
1949 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1950 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1951 NFS_I(args->inode)->layout, xdr, args);
1952 } else
1953 encode_uint32(xdr, 0);
1954 }
1955
1956 static int
1957 encode_secinfo_no_name(struct xdr_stream *xdr,
1958 const struct nfs41_secinfo_no_name_args *args,
1959 struct compound_hdr *hdr)
1960 {
1961 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1962 encode_uint32(xdr, args->style);
1963 return 0;
1964 }
1965
1966 static void encode_test_stateid(struct xdr_stream *xdr,
1967 struct nfs41_test_stateid_args *args,
1968 struct compound_hdr *hdr)
1969 {
1970 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1971 encode_uint32(xdr, 1);
1972 encode_nfs4_stateid(xdr, args->stateid);
1973 }
1974
1975 static void encode_free_stateid(struct xdr_stream *xdr,
1976 struct nfs41_free_stateid_args *args,
1977 struct compound_hdr *hdr)
1978 {
1979 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
1980 encode_nfs4_stateid(xdr, args->stateid);
1981 }
1982 #endif /* CONFIG_NFS_V4_1 */
1983
1984 /*
1985 * END OF "GENERIC" ENCODE ROUTINES.
1986 */
1987
1988 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1989 {
1990 #if defined(CONFIG_NFS_V4_1)
1991 if (args->sa_session)
1992 return args->sa_session->clp->cl_mvops->minor_version;
1993 #endif /* CONFIG_NFS_V4_1 */
1994 return 0;
1995 }
1996
1997 /*
1998 * Encode an ACCESS request
1999 */
2000 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2001 const struct nfs4_accessargs *args)
2002 {
2003 struct compound_hdr hdr = {
2004 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2005 };
2006
2007 encode_compound_hdr(xdr, req, &hdr);
2008 encode_sequence(xdr, &args->seq_args, &hdr);
2009 encode_putfh(xdr, args->fh, &hdr);
2010 encode_access(xdr, args->access, &hdr);
2011 encode_getfattr(xdr, args->bitmask, &hdr);
2012 encode_nops(&hdr);
2013 }
2014
2015 /*
2016 * Encode LOOKUP request
2017 */
2018 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2019 const struct nfs4_lookup_arg *args)
2020 {
2021 struct compound_hdr hdr = {
2022 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023 };
2024
2025 encode_compound_hdr(xdr, req, &hdr);
2026 encode_sequence(xdr, &args->seq_args, &hdr);
2027 encode_putfh(xdr, args->dir_fh, &hdr);
2028 encode_lookup(xdr, args->name, &hdr);
2029 encode_getfh(xdr, &hdr);
2030 encode_getfattr(xdr, args->bitmask, &hdr);
2031 encode_nops(&hdr);
2032 }
2033
2034 /*
2035 * Encode LOOKUP_ROOT request
2036 */
2037 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2038 struct xdr_stream *xdr,
2039 const struct nfs4_lookup_root_arg *args)
2040 {
2041 struct compound_hdr hdr = {
2042 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043 };
2044
2045 encode_compound_hdr(xdr, req, &hdr);
2046 encode_sequence(xdr, &args->seq_args, &hdr);
2047 encode_putrootfh(xdr, &hdr);
2048 encode_getfh(xdr, &hdr);
2049 encode_getfattr(xdr, args->bitmask, &hdr);
2050 encode_nops(&hdr);
2051 }
2052
2053 /*
2054 * Encode REMOVE request
2055 */
2056 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2057 const struct nfs_removeargs *args)
2058 {
2059 struct compound_hdr hdr = {
2060 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2061 };
2062
2063 encode_compound_hdr(xdr, req, &hdr);
2064 encode_sequence(xdr, &args->seq_args, &hdr);
2065 encode_putfh(xdr, args->fh, &hdr);
2066 encode_remove(xdr, &args->name, &hdr);
2067 encode_getfattr(xdr, args->bitmask, &hdr);
2068 encode_nops(&hdr);
2069 }
2070
2071 /*
2072 * Encode RENAME request
2073 */
2074 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2075 const struct nfs_renameargs *args)
2076 {
2077 struct compound_hdr hdr = {
2078 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2079 };
2080
2081 encode_compound_hdr(xdr, req, &hdr);
2082 encode_sequence(xdr, &args->seq_args, &hdr);
2083 encode_putfh(xdr, args->old_dir, &hdr);
2084 encode_savefh(xdr, &hdr);
2085 encode_putfh(xdr, args->new_dir, &hdr);
2086 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2087 encode_getfattr(xdr, args->bitmask, &hdr);
2088 encode_restorefh(xdr, &hdr);
2089 encode_getfattr(xdr, args->bitmask, &hdr);
2090 encode_nops(&hdr);
2091 }
2092
2093 /*
2094 * Encode LINK request
2095 */
2096 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2097 const struct nfs4_link_arg *args)
2098 {
2099 struct compound_hdr hdr = {
2100 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101 };
2102
2103 encode_compound_hdr(xdr, req, &hdr);
2104 encode_sequence(xdr, &args->seq_args, &hdr);
2105 encode_putfh(xdr, args->fh, &hdr);
2106 encode_savefh(xdr, &hdr);
2107 encode_putfh(xdr, args->dir_fh, &hdr);
2108 encode_link(xdr, args->name, &hdr);
2109 encode_getfattr(xdr, args->bitmask, &hdr);
2110 encode_restorefh(xdr, &hdr);
2111 encode_getfattr(xdr, args->bitmask, &hdr);
2112 encode_nops(&hdr);
2113 }
2114
2115 /*
2116 * Encode CREATE request
2117 */
2118 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2119 const struct nfs4_create_arg *args)
2120 {
2121 struct compound_hdr hdr = {
2122 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123 };
2124
2125 encode_compound_hdr(xdr, req, &hdr);
2126 encode_sequence(xdr, &args->seq_args, &hdr);
2127 encode_putfh(xdr, args->dir_fh, &hdr);
2128 encode_savefh(xdr, &hdr);
2129 encode_create(xdr, args, &hdr);
2130 encode_getfh(xdr, &hdr);
2131 encode_getfattr(xdr, args->bitmask, &hdr);
2132 encode_restorefh(xdr, &hdr);
2133 encode_getfattr(xdr, args->bitmask, &hdr);
2134 encode_nops(&hdr);
2135 }
2136
2137 /*
2138 * Encode SYMLINK request
2139 */
2140 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2141 const struct nfs4_create_arg *args)
2142 {
2143 nfs4_xdr_enc_create(req, xdr, args);
2144 }
2145
2146 /*
2147 * Encode GETATTR request
2148 */
2149 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2150 const struct nfs4_getattr_arg *args)
2151 {
2152 struct compound_hdr hdr = {
2153 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154 };
2155
2156 encode_compound_hdr(xdr, req, &hdr);
2157 encode_sequence(xdr, &args->seq_args, &hdr);
2158 encode_putfh(xdr, args->fh, &hdr);
2159 encode_getfattr(xdr, args->bitmask, &hdr);
2160 encode_nops(&hdr);
2161 }
2162
2163 /*
2164 * Encode a CLOSE request
2165 */
2166 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2167 struct nfs_closeargs *args)
2168 {
2169 struct compound_hdr hdr = {
2170 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171 };
2172
2173 encode_compound_hdr(xdr, req, &hdr);
2174 encode_sequence(xdr, &args->seq_args, &hdr);
2175 encode_putfh(xdr, args->fh, &hdr);
2176 encode_close(xdr, args, &hdr);
2177 encode_getfattr(xdr, args->bitmask, &hdr);
2178 encode_nops(&hdr);
2179 }
2180
2181 /*
2182 * Encode an OPEN request
2183 */
2184 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2185 struct nfs_openargs *args)
2186 {
2187 struct compound_hdr hdr = {
2188 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2189 };
2190
2191 encode_compound_hdr(xdr, req, &hdr);
2192 encode_sequence(xdr, &args->seq_args, &hdr);
2193 encode_putfh(xdr, args->fh, &hdr);
2194 encode_savefh(xdr, &hdr);
2195 encode_open(xdr, args, &hdr);
2196 encode_getfh(xdr, &hdr);
2197 encode_getfattr(xdr, args->bitmask, &hdr);
2198 encode_restorefh(xdr, &hdr);
2199 encode_getfattr(xdr, args->dir_bitmask, &hdr);
2200 encode_nops(&hdr);
2201 }
2202
2203 /*
2204 * Encode an OPEN_CONFIRM request
2205 */
2206 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2207 struct xdr_stream *xdr,
2208 struct nfs_open_confirmargs *args)
2209 {
2210 struct compound_hdr hdr = {
2211 .nops = 0,
2212 };
2213
2214 encode_compound_hdr(xdr, req, &hdr);
2215 encode_putfh(xdr, args->fh, &hdr);
2216 encode_open_confirm(xdr, args, &hdr);
2217 encode_nops(&hdr);
2218 }
2219
2220 /*
2221 * Encode an OPEN request with no attributes.
2222 */
2223 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2224 struct xdr_stream *xdr,
2225 struct nfs_openargs *args)
2226 {
2227 struct compound_hdr hdr = {
2228 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2229 };
2230
2231 encode_compound_hdr(xdr, req, &hdr);
2232 encode_sequence(xdr, &args->seq_args, &hdr);
2233 encode_putfh(xdr, args->fh, &hdr);
2234 encode_open(xdr, args, &hdr);
2235 encode_getfattr(xdr, args->bitmask, &hdr);
2236 encode_nops(&hdr);
2237 }
2238
2239 /*
2240 * Encode an OPEN_DOWNGRADE request
2241 */
2242 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2243 struct xdr_stream *xdr,
2244 struct nfs_closeargs *args)
2245 {
2246 struct compound_hdr hdr = {
2247 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248 };
2249
2250 encode_compound_hdr(xdr, req, &hdr);
2251 encode_sequence(xdr, &args->seq_args, &hdr);
2252 encode_putfh(xdr, args->fh, &hdr);
2253 encode_open_downgrade(xdr, args, &hdr);
2254 encode_getfattr(xdr, args->bitmask, &hdr);
2255 encode_nops(&hdr);
2256 }
2257
2258 /*
2259 * Encode a LOCK request
2260 */
2261 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2262 struct nfs_lock_args *args)
2263 {
2264 struct compound_hdr hdr = {
2265 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2266 };
2267
2268 encode_compound_hdr(xdr, req, &hdr);
2269 encode_sequence(xdr, &args->seq_args, &hdr);
2270 encode_putfh(xdr, args->fh, &hdr);
2271 encode_lock(xdr, args, &hdr);
2272 encode_nops(&hdr);
2273 }
2274
2275 /*
2276 * Encode a LOCKT request
2277 */
2278 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2279 struct nfs_lockt_args *args)
2280 {
2281 struct compound_hdr hdr = {
2282 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2283 };
2284
2285 encode_compound_hdr(xdr, req, &hdr);
2286 encode_sequence(xdr, &args->seq_args, &hdr);
2287 encode_putfh(xdr, args->fh, &hdr);
2288 encode_lockt(xdr, args, &hdr);
2289 encode_nops(&hdr);
2290 }
2291
2292 /*
2293 * Encode a LOCKU request
2294 */
2295 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2296 struct nfs_locku_args *args)
2297 {
2298 struct compound_hdr hdr = {
2299 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2300 };
2301
2302 encode_compound_hdr(xdr, req, &hdr);
2303 encode_sequence(xdr, &args->seq_args, &hdr);
2304 encode_putfh(xdr, args->fh, &hdr);
2305 encode_locku(xdr, args, &hdr);
2306 encode_nops(&hdr);
2307 }
2308
2309 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2310 struct xdr_stream *xdr,
2311 struct nfs_release_lockowner_args *args)
2312 {
2313 struct compound_hdr hdr = {
2314 .minorversion = 0,
2315 };
2316
2317 encode_compound_hdr(xdr, req, &hdr);
2318 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2319 encode_nops(&hdr);
2320 }
2321
2322 /*
2323 * Encode a READLINK request
2324 */
2325 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2326 const struct nfs4_readlink *args)
2327 {
2328 struct compound_hdr hdr = {
2329 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2330 };
2331
2332 encode_compound_hdr(xdr, req, &hdr);
2333 encode_sequence(xdr, &args->seq_args, &hdr);
2334 encode_putfh(xdr, args->fh, &hdr);
2335 encode_readlink(xdr, args, req, &hdr);
2336
2337 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2338 args->pgbase, args->pglen);
2339 encode_nops(&hdr);
2340 }
2341
2342 /*
2343 * Encode a READDIR request
2344 */
2345 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2346 const struct nfs4_readdir_arg *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_readdir(xdr, args, req, &hdr);
2356
2357 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2358 args->pgbase, args->count);
2359 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2360 __func__, hdr.replen << 2, args->pages,
2361 args->pgbase, args->count);
2362 encode_nops(&hdr);
2363 }
2364
2365 /*
2366 * Encode a READ request
2367 */
2368 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2369 struct nfs_readargs *args)
2370 {
2371 struct compound_hdr hdr = {
2372 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2373 };
2374
2375 encode_compound_hdr(xdr, req, &hdr);
2376 encode_sequence(xdr, &args->seq_args, &hdr);
2377 encode_putfh(xdr, args->fh, &hdr);
2378 encode_read(xdr, args, &hdr);
2379
2380 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2381 args->pages, args->pgbase, args->count);
2382 req->rq_rcv_buf.flags |= XDRBUF_READ;
2383 encode_nops(&hdr);
2384 }
2385
2386 /*
2387 * Encode an SETATTR request
2388 */
2389 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2390 struct nfs_setattrargs *args)
2391 {
2392 struct compound_hdr hdr = {
2393 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2394 };
2395
2396 encode_compound_hdr(xdr, req, &hdr);
2397 encode_sequence(xdr, &args->seq_args, &hdr);
2398 encode_putfh(xdr, args->fh, &hdr);
2399 encode_setattr(xdr, args, args->server, &hdr);
2400 encode_getfattr(xdr, args->bitmask, &hdr);
2401 encode_nops(&hdr);
2402 }
2403
2404 /*
2405 * Encode a GETACL request
2406 */
2407 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2408 struct nfs_getaclargs *args)
2409 {
2410 struct compound_hdr hdr = {
2411 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2412 };
2413 uint32_t replen;
2414
2415 encode_compound_hdr(xdr, req, &hdr);
2416 encode_sequence(xdr, &args->seq_args, &hdr);
2417 encode_putfh(xdr, args->fh, &hdr);
2418 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2419 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2420
2421 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2422 args->acl_pages, args->acl_pgbase, args->acl_len);
2423
2424 encode_nops(&hdr);
2425 }
2426
2427 /*
2428 * Encode a WRITE request
2429 */
2430 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2431 struct nfs_writeargs *args)
2432 {
2433 struct compound_hdr hdr = {
2434 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435 };
2436
2437 encode_compound_hdr(xdr, req, &hdr);
2438 encode_sequence(xdr, &args->seq_args, &hdr);
2439 encode_putfh(xdr, args->fh, &hdr);
2440 encode_write(xdr, args, &hdr);
2441 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2442 if (args->bitmask)
2443 encode_getfattr(xdr, args->bitmask, &hdr);
2444 encode_nops(&hdr);
2445 }
2446
2447 /*
2448 * a COMMIT request
2449 */
2450 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2451 struct nfs_writeargs *args)
2452 {
2453 struct compound_hdr hdr = {
2454 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455 };
2456
2457 encode_compound_hdr(xdr, req, &hdr);
2458 encode_sequence(xdr, &args->seq_args, &hdr);
2459 encode_putfh(xdr, args->fh, &hdr);
2460 encode_commit(xdr, args, &hdr);
2461 if (args->bitmask)
2462 encode_getfattr(xdr, args->bitmask, &hdr);
2463 encode_nops(&hdr);
2464 }
2465
2466 /*
2467 * FSINFO request
2468 */
2469 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2470 struct nfs4_fsinfo_arg *args)
2471 {
2472 struct compound_hdr hdr = {
2473 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2474 };
2475
2476 encode_compound_hdr(xdr, req, &hdr);
2477 encode_sequence(xdr, &args->seq_args, &hdr);
2478 encode_putfh(xdr, args->fh, &hdr);
2479 encode_fsinfo(xdr, args->bitmask, &hdr);
2480 encode_nops(&hdr);
2481 }
2482
2483 /*
2484 * a PATHCONF request
2485 */
2486 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2487 const struct nfs4_pathconf_arg *args)
2488 {
2489 struct compound_hdr hdr = {
2490 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2491 };
2492
2493 encode_compound_hdr(xdr, req, &hdr);
2494 encode_sequence(xdr, &args->seq_args, &hdr);
2495 encode_putfh(xdr, args->fh, &hdr);
2496 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2497 &hdr);
2498 encode_nops(&hdr);
2499 }
2500
2501 /*
2502 * a STATFS request
2503 */
2504 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2505 const struct nfs4_statfs_arg *args)
2506 {
2507 struct compound_hdr hdr = {
2508 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509 };
2510
2511 encode_compound_hdr(xdr, req, &hdr);
2512 encode_sequence(xdr, &args->seq_args, &hdr);
2513 encode_putfh(xdr, args->fh, &hdr);
2514 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2515 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2516 encode_nops(&hdr);
2517 }
2518
2519 /*
2520 * GETATTR_BITMAP request
2521 */
2522 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2523 struct xdr_stream *xdr,
2524 struct nfs4_server_caps_arg *args)
2525 {
2526 struct compound_hdr hdr = {
2527 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2528 };
2529
2530 encode_compound_hdr(xdr, req, &hdr);
2531 encode_sequence(xdr, &args->seq_args, &hdr);
2532 encode_putfh(xdr, args->fhandle, &hdr);
2533 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2534 FATTR4_WORD0_FH_EXPIRE_TYPE|
2535 FATTR4_WORD0_LINK_SUPPORT|
2536 FATTR4_WORD0_SYMLINK_SUPPORT|
2537 FATTR4_WORD0_ACLSUPPORT, &hdr);
2538 encode_nops(&hdr);
2539 }
2540
2541 /*
2542 * a RENEW request
2543 */
2544 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2545 struct nfs_client *clp)
2546 {
2547 struct compound_hdr hdr = {
2548 .nops = 0,
2549 };
2550
2551 encode_compound_hdr(xdr, req, &hdr);
2552 encode_renew(xdr, clp->cl_clientid, &hdr);
2553 encode_nops(&hdr);
2554 }
2555
2556 /*
2557 * a SETCLIENTID request
2558 */
2559 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2560 struct xdr_stream *xdr,
2561 struct nfs4_setclientid *sc)
2562 {
2563 struct compound_hdr hdr = {
2564 .nops = 0,
2565 };
2566
2567 encode_compound_hdr(xdr, req, &hdr);
2568 encode_setclientid(xdr, sc, &hdr);
2569 encode_nops(&hdr);
2570 }
2571
2572 /*
2573 * a SETCLIENTID_CONFIRM request
2574 */
2575 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2576 struct xdr_stream *xdr,
2577 struct nfs4_setclientid_res *arg)
2578 {
2579 struct compound_hdr hdr = {
2580 .nops = 0,
2581 };
2582 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2583
2584 encode_compound_hdr(xdr, req, &hdr);
2585 encode_setclientid_confirm(xdr, arg, &hdr);
2586 encode_putrootfh(xdr, &hdr);
2587 encode_fsinfo(xdr, lease_bitmap, &hdr);
2588 encode_nops(&hdr);
2589 }
2590
2591 /*
2592 * DELEGRETURN request
2593 */
2594 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2595 struct xdr_stream *xdr,
2596 const struct nfs4_delegreturnargs *args)
2597 {
2598 struct compound_hdr hdr = {
2599 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2600 };
2601
2602 encode_compound_hdr(xdr, req, &hdr);
2603 encode_sequence(xdr, &args->seq_args, &hdr);
2604 encode_putfh(xdr, args->fhandle, &hdr);
2605 encode_delegreturn(xdr, args->stateid, &hdr);
2606 encode_getfattr(xdr, args->bitmask, &hdr);
2607 encode_nops(&hdr);
2608 }
2609
2610 /*
2611 * Encode FS_LOCATIONS request
2612 */
2613 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2614 struct xdr_stream *xdr,
2615 struct nfs4_fs_locations_arg *args)
2616 {
2617 struct compound_hdr hdr = {
2618 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2619 };
2620 uint32_t replen;
2621
2622 encode_compound_hdr(xdr, req, &hdr);
2623 encode_sequence(xdr, &args->seq_args, &hdr);
2624 encode_putfh(xdr, args->dir_fh, &hdr);
2625 encode_lookup(xdr, args->name, &hdr);
2626 replen = hdr.replen; /* get the attribute into args->page */
2627 encode_fs_locations(xdr, args->bitmask, &hdr);
2628
2629 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2630 0, PAGE_SIZE);
2631 encode_nops(&hdr);
2632 }
2633
2634 /*
2635 * Encode SECINFO request
2636 */
2637 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2638 struct xdr_stream *xdr,
2639 struct nfs4_secinfo_arg *args)
2640 {
2641 struct compound_hdr hdr = {
2642 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643 };
2644
2645 encode_compound_hdr(xdr, req, &hdr);
2646 encode_sequence(xdr, &args->seq_args, &hdr);
2647 encode_putfh(xdr, args->dir_fh, &hdr);
2648 encode_secinfo(xdr, args->name, &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 #if defined(CONFIG_NFS_V4_1)
2653 /*
2654 * EXCHANGE_ID request
2655 */
2656 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2657 struct xdr_stream *xdr,
2658 struct nfs41_exchange_id_args *args)
2659 {
2660 struct compound_hdr hdr = {
2661 .minorversion = args->client->cl_mvops->minor_version,
2662 };
2663
2664 encode_compound_hdr(xdr, req, &hdr);
2665 encode_exchange_id(xdr, args, &hdr);
2666 encode_nops(&hdr);
2667 }
2668
2669 /*
2670 * a CREATE_SESSION request
2671 */
2672 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2673 struct xdr_stream *xdr,
2674 struct nfs41_create_session_args *args)
2675 {
2676 struct compound_hdr hdr = {
2677 .minorversion = args->client->cl_mvops->minor_version,
2678 };
2679
2680 encode_compound_hdr(xdr, req, &hdr);
2681 encode_create_session(xdr, args, &hdr);
2682 encode_nops(&hdr);
2683 }
2684
2685 /*
2686 * a DESTROY_SESSION request
2687 */
2688 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2689 struct xdr_stream *xdr,
2690 struct nfs4_session *session)
2691 {
2692 struct compound_hdr hdr = {
2693 .minorversion = session->clp->cl_mvops->minor_version,
2694 };
2695
2696 encode_compound_hdr(xdr, req, &hdr);
2697 encode_destroy_session(xdr, session, &hdr);
2698 encode_nops(&hdr);
2699 }
2700
2701 /*
2702 * a SEQUENCE request
2703 */
2704 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2705 struct nfs4_sequence_args *args)
2706 {
2707 struct compound_hdr hdr = {
2708 .minorversion = nfs4_xdr_minorversion(args),
2709 };
2710
2711 encode_compound_hdr(xdr, req, &hdr);
2712 encode_sequence(xdr, args, &hdr);
2713 encode_nops(&hdr);
2714 }
2715
2716 /*
2717 * a GET_LEASE_TIME request
2718 */
2719 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2720 struct xdr_stream *xdr,
2721 struct nfs4_get_lease_time_args *args)
2722 {
2723 struct compound_hdr hdr = {
2724 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2725 };
2726 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2727
2728 encode_compound_hdr(xdr, req, &hdr);
2729 encode_sequence(xdr, &args->la_seq_args, &hdr);
2730 encode_putrootfh(xdr, &hdr);
2731 encode_fsinfo(xdr, lease_bitmap, &hdr);
2732 encode_nops(&hdr);
2733 }
2734
2735 /*
2736 * a RECLAIM_COMPLETE request
2737 */
2738 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2739 struct xdr_stream *xdr,
2740 struct nfs41_reclaim_complete_args *args)
2741 {
2742 struct compound_hdr hdr = {
2743 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2744 };
2745
2746 encode_compound_hdr(xdr, req, &hdr);
2747 encode_sequence(xdr, &args->seq_args, &hdr);
2748 encode_reclaim_complete(xdr, args, &hdr);
2749 encode_nops(&hdr);
2750 }
2751
2752 /*
2753 * Encode GETDEVICELIST request
2754 */
2755 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2756 struct xdr_stream *xdr,
2757 struct nfs4_getdevicelist_args *args)
2758 {
2759 struct compound_hdr hdr = {
2760 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2761 };
2762
2763 encode_compound_hdr(xdr, req, &hdr);
2764 encode_sequence(xdr, &args->seq_args, &hdr);
2765 encode_putfh(xdr, args->fh, &hdr);
2766 encode_getdevicelist(xdr, args, &hdr);
2767 encode_nops(&hdr);
2768 }
2769
2770 /*
2771 * Encode GETDEVICEINFO request
2772 */
2773 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2774 struct xdr_stream *xdr,
2775 struct nfs4_getdeviceinfo_args *args)
2776 {
2777 struct compound_hdr hdr = {
2778 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2779 };
2780
2781 encode_compound_hdr(xdr, req, &hdr);
2782 encode_sequence(xdr, &args->seq_args, &hdr);
2783 encode_getdeviceinfo(xdr, args, &hdr);
2784
2785 /* set up reply kvec. Subtract notification bitmap max size (2)
2786 * so that notification bitmap is put in xdr_buf tail */
2787 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2788 args->pdev->pages, args->pdev->pgbase,
2789 args->pdev->pglen);
2790
2791 encode_nops(&hdr);
2792 }
2793
2794 /*
2795 * Encode LAYOUTGET request
2796 */
2797 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2798 struct xdr_stream *xdr,
2799 struct nfs4_layoutget_args *args)
2800 {
2801 struct compound_hdr hdr = {
2802 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2803 };
2804
2805 encode_compound_hdr(xdr, req, &hdr);
2806 encode_sequence(xdr, &args->seq_args, &hdr);
2807 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2808 encode_layoutget(xdr, args, &hdr);
2809
2810 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2811 args->layout.pages, 0, args->layout.pglen);
2812
2813 encode_nops(&hdr);
2814 }
2815
2816 /*
2817 * Encode LAYOUTCOMMIT request
2818 */
2819 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2820 struct xdr_stream *xdr,
2821 struct nfs4_layoutcommit_args *args)
2822 {
2823 struct nfs4_layoutcommit_data *data =
2824 container_of(args, struct nfs4_layoutcommit_data, args);
2825 struct compound_hdr hdr = {
2826 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_sequence(xdr, &args->seq_args, &hdr);
2831 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2832 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2833 encode_getfattr(xdr, args->bitmask, &hdr);
2834 encode_nops(&hdr);
2835 }
2836
2837 /*
2838 * Encode LAYOUTRETURN request
2839 */
2840 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2841 struct xdr_stream *xdr,
2842 struct nfs4_layoutreturn_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_putfh(xdr, NFS_FH(args->inode), &hdr);
2851 encode_layoutreturn(xdr, args, &hdr);
2852 encode_nops(&hdr);
2853 }
2854
2855 /*
2856 * Encode SECINFO_NO_NAME request
2857 */
2858 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2859 struct xdr_stream *xdr,
2860 struct nfs41_secinfo_no_name_args *args)
2861 {
2862 struct compound_hdr hdr = {
2863 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2864 };
2865
2866 encode_compound_hdr(xdr, req, &hdr);
2867 encode_sequence(xdr, &args->seq_args, &hdr);
2868 encode_putrootfh(xdr, &hdr);
2869 encode_secinfo_no_name(xdr, args, &hdr);
2870 encode_nops(&hdr);
2871 return 0;
2872 }
2873
2874 /*
2875 * Encode TEST_STATEID request
2876 */
2877 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2878 struct xdr_stream *xdr,
2879 struct nfs41_test_stateid_args *args)
2880 {
2881 struct compound_hdr hdr = {
2882 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883 };
2884
2885 encode_compound_hdr(xdr, req, &hdr);
2886 encode_sequence(xdr, &args->seq_args, &hdr);
2887 encode_test_stateid(xdr, args, &hdr);
2888 encode_nops(&hdr);
2889 }
2890
2891 /*
2892 * Encode FREE_STATEID request
2893 */
2894 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2895 struct xdr_stream *xdr,
2896 struct nfs41_free_stateid_args *args)
2897 {
2898 struct compound_hdr hdr = {
2899 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2900 };
2901
2902 encode_compound_hdr(xdr, req, &hdr);
2903 encode_sequence(xdr, &args->seq_args, &hdr);
2904 encode_free_stateid(xdr, args, &hdr);
2905 encode_nops(&hdr);
2906 }
2907 #endif /* CONFIG_NFS_V4_1 */
2908
2909 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2910 {
2911 dprintk("nfs: %s: prematurely hit end of receive buffer. "
2912 "Remaining buffer length is %tu words.\n",
2913 func, xdr->end - xdr->p);
2914 }
2915
2916 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2917 {
2918 __be32 *p;
2919
2920 p = xdr_inline_decode(xdr, 4);
2921 if (unlikely(!p))
2922 goto out_overflow;
2923 *len = be32_to_cpup(p);
2924 p = xdr_inline_decode(xdr, *len);
2925 if (unlikely(!p))
2926 goto out_overflow;
2927 *string = (char *)p;
2928 return 0;
2929 out_overflow:
2930 print_overflow_msg(__func__, xdr);
2931 return -EIO;
2932 }
2933
2934 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2935 {
2936 __be32 *p;
2937
2938 p = xdr_inline_decode(xdr, 8);
2939 if (unlikely(!p))
2940 goto out_overflow;
2941 hdr->status = be32_to_cpup(p++);
2942 hdr->taglen = be32_to_cpup(p);
2943
2944 p = xdr_inline_decode(xdr, hdr->taglen + 4);
2945 if (unlikely(!p))
2946 goto out_overflow;
2947 hdr->tag = (char *)p;
2948 p += XDR_QUADLEN(hdr->taglen);
2949 hdr->nops = be32_to_cpup(p);
2950 if (unlikely(hdr->nops < 1))
2951 return nfs4_stat_to_errno(hdr->status);
2952 return 0;
2953 out_overflow:
2954 print_overflow_msg(__func__, xdr);
2955 return -EIO;
2956 }
2957
2958 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2959 {
2960 __be32 *p;
2961 uint32_t opnum;
2962 int32_t nfserr;
2963
2964 p = xdr_inline_decode(xdr, 8);
2965 if (unlikely(!p))
2966 goto out_overflow;
2967 opnum = be32_to_cpup(p++);
2968 if (opnum != expected) {
2969 dprintk("nfs: Server returned operation"
2970 " %d but we issued a request for %d\n",
2971 opnum, expected);
2972 return -EIO;
2973 }
2974 nfserr = be32_to_cpup(p);
2975 if (nfserr != NFS_OK)
2976 return nfs4_stat_to_errno(nfserr);
2977 return 0;
2978 out_overflow:
2979 print_overflow_msg(__func__, xdr);
2980 return -EIO;
2981 }
2982
2983 /* Dummy routine */
2984 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2985 {
2986 __be32 *p;
2987 unsigned int strlen;
2988 char *str;
2989
2990 p = xdr_inline_decode(xdr, 12);
2991 if (likely(p))
2992 return decode_opaque_inline(xdr, &strlen, &str);
2993 print_overflow_msg(__func__, xdr);
2994 return -EIO;
2995 }
2996
2997 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2998 {
2999 uint32_t bmlen;
3000 __be32 *p;
3001
3002 p = xdr_inline_decode(xdr, 4);
3003 if (unlikely(!p))
3004 goto out_overflow;
3005 bmlen = be32_to_cpup(p);
3006
3007 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3008 p = xdr_inline_decode(xdr, (bmlen << 2));
3009 if (unlikely(!p))
3010 goto out_overflow;
3011 if (bmlen > 0) {
3012 bitmap[0] = be32_to_cpup(p++);
3013 if (bmlen > 1) {
3014 bitmap[1] = be32_to_cpup(p++);
3015 if (bmlen > 2)
3016 bitmap[2] = be32_to_cpup(p);
3017 }
3018 }
3019 return 0;
3020 out_overflow:
3021 print_overflow_msg(__func__, xdr);
3022 return -EIO;
3023 }
3024
3025 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
3026 {
3027 __be32 *p;
3028
3029 p = xdr_inline_decode(xdr, 4);
3030 if (unlikely(!p))
3031 goto out_overflow;
3032 *attrlen = be32_to_cpup(p);
3033 *savep = xdr->p;
3034 return 0;
3035 out_overflow:
3036 print_overflow_msg(__func__, xdr);
3037 return -EIO;
3038 }
3039
3040 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3041 {
3042 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3043 int ret;
3044 ret = decode_attr_bitmap(xdr, bitmask);
3045 if (unlikely(ret < 0))
3046 return ret;
3047 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3048 } else
3049 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3050 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3051 bitmask[0], bitmask[1], bitmask[2]);
3052 return 0;
3053 }
3054
3055 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3056 {
3057 __be32 *p;
3058 int ret = 0;
3059
3060 *type = 0;
3061 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3062 return -EIO;
3063 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3064 p = xdr_inline_decode(xdr, 4);
3065 if (unlikely(!p))
3066 goto out_overflow;
3067 *type = be32_to_cpup(p);
3068 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3069 dprintk("%s: bad type %d\n", __func__, *type);
3070 return -EIO;
3071 }
3072 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3073 ret = NFS_ATTR_FATTR_TYPE;
3074 }
3075 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3076 return ret;
3077 out_overflow:
3078 print_overflow_msg(__func__, xdr);
3079 return -EIO;
3080 }
3081
3082 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3083 uint32_t *bitmap, uint32_t *type)
3084 {
3085 __be32 *p;
3086
3087 *type = 0;
3088 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3089 return -EIO;
3090 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3091 p = xdr_inline_decode(xdr, 4);
3092 if (unlikely(!p))
3093 goto out_overflow;
3094 *type = be32_to_cpup(p);
3095 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3096 }
3097 dprintk("%s: expire type=0x%x\n", __func__, *type);
3098 return 0;
3099 out_overflow:
3100 print_overflow_msg(__func__, xdr);
3101 return -EIO;
3102 }
3103
3104 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3105 {
3106 __be32 *p;
3107 int ret = 0;
3108
3109 *change = 0;
3110 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3111 return -EIO;
3112 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3113 p = xdr_inline_decode(xdr, 8);
3114 if (unlikely(!p))
3115 goto out_overflow;
3116 xdr_decode_hyper(p, change);
3117 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3118 ret = NFS_ATTR_FATTR_CHANGE;
3119 }
3120 dprintk("%s: change attribute=%Lu\n", __func__,
3121 (unsigned long long)*change);
3122 return ret;
3123 out_overflow:
3124 print_overflow_msg(__func__, xdr);
3125 return -EIO;
3126 }
3127
3128 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3129 {
3130 __be32 *p;
3131 int ret = 0;
3132
3133 *size = 0;
3134 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3135 return -EIO;
3136 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3137 p = xdr_inline_decode(xdr, 8);
3138 if (unlikely(!p))
3139 goto out_overflow;
3140 xdr_decode_hyper(p, size);
3141 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3142 ret = NFS_ATTR_FATTR_SIZE;
3143 }
3144 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3145 return ret;
3146 out_overflow:
3147 print_overflow_msg(__func__, xdr);
3148 return -EIO;
3149 }
3150
3151 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3152 {
3153 __be32 *p;
3154
3155 *res = 0;
3156 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3157 return -EIO;
3158 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3159 p = xdr_inline_decode(xdr, 4);
3160 if (unlikely(!p))
3161 goto out_overflow;
3162 *res = be32_to_cpup(p);
3163 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3164 }
3165 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3166 return 0;
3167 out_overflow:
3168 print_overflow_msg(__func__, xdr);
3169 return -EIO;
3170 }
3171
3172 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3173 {
3174 __be32 *p;
3175
3176 *res = 0;
3177 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3178 return -EIO;
3179 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3180 p = xdr_inline_decode(xdr, 4);
3181 if (unlikely(!p))
3182 goto out_overflow;
3183 *res = be32_to_cpup(p);
3184 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3185 }
3186 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3187 return 0;
3188 out_overflow:
3189 print_overflow_msg(__func__, xdr);
3190 return -EIO;
3191 }
3192
3193 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3194 {
3195 __be32 *p;
3196 int ret = 0;
3197
3198 fsid->major = 0;
3199 fsid->minor = 0;
3200 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3201 return -EIO;
3202 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3203 p = xdr_inline_decode(xdr, 16);
3204 if (unlikely(!p))
3205 goto out_overflow;
3206 p = xdr_decode_hyper(p, &fsid->major);
3207 xdr_decode_hyper(p, &fsid->minor);
3208 bitmap[0] &= ~FATTR4_WORD0_FSID;
3209 ret = NFS_ATTR_FATTR_FSID;
3210 }
3211 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3212 (unsigned long long)fsid->major,
3213 (unsigned long long)fsid->minor);
3214 return ret;
3215 out_overflow:
3216 print_overflow_msg(__func__, xdr);
3217 return -EIO;
3218 }
3219
3220 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3221 {
3222 __be32 *p;
3223
3224 *res = 60;
3225 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3226 return -EIO;
3227 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3228 p = xdr_inline_decode(xdr, 4);
3229 if (unlikely(!p))
3230 goto out_overflow;
3231 *res = be32_to_cpup(p);
3232 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3233 }
3234 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3235 return 0;
3236 out_overflow:
3237 print_overflow_msg(__func__, xdr);
3238 return -EIO;
3239 }
3240
3241 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3242 {
3243 __be32 *p;
3244
3245 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3246 return -EIO;
3247 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3248 p = xdr_inline_decode(xdr, 4);
3249 if (unlikely(!p))
3250 goto out_overflow;
3251 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3252 *res = -be32_to_cpup(p);
3253 }
3254 return 0;
3255 out_overflow:
3256 print_overflow_msg(__func__, xdr);
3257 return -EIO;
3258 }
3259
3260 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3261 {
3262 __be32 *p;
3263 int len;
3264
3265 if (fh != NULL)
3266 memset(fh, 0, sizeof(*fh));
3267
3268 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3269 return -EIO;
3270 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3271 p = xdr_inline_decode(xdr, 4);
3272 if (unlikely(!p))
3273 goto out_overflow;
3274 len = be32_to_cpup(p);
3275 if (len > NFS4_FHSIZE)
3276 return -EIO;
3277 p = xdr_inline_decode(xdr, len);
3278 if (unlikely(!p))
3279 goto out_overflow;
3280 if (fh != NULL) {
3281 memcpy(fh->data, p, len);
3282 fh->size = len;
3283 }
3284 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3285 }
3286 return 0;
3287 out_overflow:
3288 print_overflow_msg(__func__, xdr);
3289 return -EIO;
3290 }
3291
3292 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3293 {
3294 __be32 *p;
3295
3296 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3297 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3298 return -EIO;
3299 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3300 p = xdr_inline_decode(xdr, 4);
3301 if (unlikely(!p))
3302 goto out_overflow;
3303 *res = be32_to_cpup(p);
3304 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3305 }
3306 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3307 return 0;
3308 out_overflow:
3309 print_overflow_msg(__func__, xdr);
3310 return -EIO;
3311 }
3312
3313 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3314 {
3315 __be32 *p;
3316 int ret = 0;
3317
3318 *fileid = 0;
3319 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3320 return -EIO;
3321 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3322 p = xdr_inline_decode(xdr, 8);
3323 if (unlikely(!p))
3324 goto out_overflow;
3325 xdr_decode_hyper(p, fileid);
3326 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3327 ret = NFS_ATTR_FATTR_FILEID;
3328 }
3329 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3330 return ret;
3331 out_overflow:
3332 print_overflow_msg(__func__, xdr);
3333 return -EIO;
3334 }
3335
3336 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3337 {
3338 __be32 *p;
3339 int ret = 0;
3340
3341 *fileid = 0;
3342 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3343 return -EIO;
3344 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3345 p = xdr_inline_decode(xdr, 8);
3346 if (unlikely(!p))
3347 goto out_overflow;
3348 xdr_decode_hyper(p, fileid);
3349 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3350 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3351 }
3352 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3353 return ret;
3354 out_overflow:
3355 print_overflow_msg(__func__, xdr);
3356 return -EIO;
3357 }
3358
3359 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3360 {
3361 __be32 *p;
3362 int status = 0;
3363
3364 *res = 0;
3365 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3366 return -EIO;
3367 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3368 p = xdr_inline_decode(xdr, 8);
3369 if (unlikely(!p))
3370 goto out_overflow;
3371 xdr_decode_hyper(p, res);
3372 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3373 }
3374 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3375 return status;
3376 out_overflow:
3377 print_overflow_msg(__func__, xdr);
3378 return -EIO;
3379 }
3380
3381 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3382 {
3383 __be32 *p;
3384 int status = 0;
3385
3386 *res = 0;
3387 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3388 return -EIO;
3389 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3390 p = xdr_inline_decode(xdr, 8);
3391 if (unlikely(!p))
3392 goto out_overflow;
3393 xdr_decode_hyper(p, res);
3394 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3395 }
3396 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3397 return status;
3398 out_overflow:
3399 print_overflow_msg(__func__, xdr);
3400 return -EIO;
3401 }
3402
3403 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3404 {
3405 __be32 *p;
3406 int status = 0;
3407
3408 *res = 0;
3409 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3410 return -EIO;
3411 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3412 p = xdr_inline_decode(xdr, 8);
3413 if (unlikely(!p))
3414 goto out_overflow;
3415 xdr_decode_hyper(p, res);
3416 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3417 }
3418 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3419 return status;
3420 out_overflow:
3421 print_overflow_msg(__func__, xdr);
3422 return -EIO;
3423 }
3424
3425 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3426 {
3427 u32 n;
3428 __be32 *p;
3429 int status = 0;
3430
3431 p = xdr_inline_decode(xdr, 4);
3432 if (unlikely(!p))
3433 goto out_overflow;
3434 n = be32_to_cpup(p);
3435 if (n == 0)
3436 goto root_path;
3437 dprintk("pathname4: ");
3438 path->ncomponents = 0;
3439 while (path->ncomponents < n) {
3440 struct nfs4_string *component = &path->components[path->ncomponents];
3441 status = decode_opaque_inline(xdr, &component->len, &component->data);
3442 if (unlikely(status != 0))
3443 goto out_eio;
3444 ifdebug (XDR)
3445 pr_cont("%s%.*s ",
3446 (path->ncomponents != n ? "/ " : ""),
3447 component->len, component->data);
3448 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3449 path->ncomponents++;
3450 else {
3451 dprintk("cannot parse %d components in path\n", n);
3452 goto out_eio;
3453 }
3454 }
3455 out:
3456 return status;
3457 root_path:
3458 /* a root pathname is sent as a zero component4 */
3459 path->ncomponents = 1;
3460 path->components[0].len=0;
3461 path->components[0].data=NULL;
3462 dprintk("pathname4: /\n");
3463 goto out;
3464 out_eio:
3465 dprintk(" status %d", status);
3466 status = -EIO;
3467 goto out;
3468 out_overflow:
3469 print_overflow_msg(__func__, xdr);
3470 return -EIO;
3471 }
3472
3473 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3474 {
3475 int n;
3476 __be32 *p;
3477 int status = -EIO;
3478
3479 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3480 goto out;
3481 status = 0;
3482 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3483 goto out;
3484 status = -EIO;
3485 /* Ignore borken servers that return unrequested attrs */
3486 if (unlikely(res == NULL))
3487 goto out;
3488 dprintk("%s: fsroot:\n", __func__);
3489 status = decode_pathname(xdr, &res->fs_path);
3490 if (unlikely(status != 0))
3491 goto out;
3492 p = xdr_inline_decode(xdr, 4);
3493 if (unlikely(!p))
3494 goto out_overflow;
3495 n = be32_to_cpup(p);
3496 if (n <= 0)
3497 goto out_eio;
3498 res->nlocations = 0;
3499 while (res->nlocations < n) {
3500 u32 m;
3501 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3502
3503 p = xdr_inline_decode(xdr, 4);
3504 if (unlikely(!p))
3505 goto out_overflow;
3506 m = be32_to_cpup(p);
3507
3508 loc->nservers = 0;
3509 dprintk("%s: servers:\n", __func__);
3510 while (loc->nservers < m) {
3511 struct nfs4_string *server = &loc->servers[loc->nservers];
3512 status = decode_opaque_inline(xdr, &server->len, &server->data);
3513 if (unlikely(status != 0))
3514 goto out_eio;
3515 dprintk("%s ", server->data);
3516 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3517 loc->nservers++;
3518 else {
3519 unsigned int i;
3520 dprintk("%s: using first %u of %u servers "
3521 "returned for location %u\n",
3522 __func__,
3523 NFS4_FS_LOCATION_MAXSERVERS,
3524 m, res->nlocations);
3525 for (i = loc->nservers; i < m; i++) {
3526 unsigned int len;
3527 char *data;
3528 status = decode_opaque_inline(xdr, &len, &data);
3529 if (unlikely(status != 0))
3530 goto out_eio;
3531 }
3532 }
3533 }
3534 status = decode_pathname(xdr, &loc->rootpath);
3535 if (unlikely(status != 0))
3536 goto out_eio;
3537 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3538 res->nlocations++;
3539 }
3540 if (res->nlocations != 0)
3541 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3542 out:
3543 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3544 return status;
3545 out_overflow:
3546 print_overflow_msg(__func__, xdr);
3547 out_eio:
3548 status = -EIO;
3549 goto out;
3550 }
3551
3552 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3553 {
3554 __be32 *p;
3555 int status = 0;
3556
3557 *res = 0;
3558 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3559 return -EIO;
3560 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3561 p = xdr_inline_decode(xdr, 8);
3562 if (unlikely(!p))
3563 goto out_overflow;
3564 xdr_decode_hyper(p, res);
3565 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3566 }
3567 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3568 return status;
3569 out_overflow:
3570 print_overflow_msg(__func__, xdr);
3571 return -EIO;
3572 }
3573
3574 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3575 {
3576 __be32 *p;
3577 int status = 0;
3578
3579 *maxlink = 1;
3580 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3581 return -EIO;
3582 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3583 p = xdr_inline_decode(xdr, 4);
3584 if (unlikely(!p))
3585 goto out_overflow;
3586 *maxlink = be32_to_cpup(p);
3587 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3588 }
3589 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3590 return status;
3591 out_overflow:
3592 print_overflow_msg(__func__, xdr);
3593 return -EIO;
3594 }
3595
3596 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3597 {
3598 __be32 *p;
3599 int status = 0;
3600
3601 *maxname = 1024;
3602 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3603 return -EIO;
3604 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3605 p = xdr_inline_decode(xdr, 4);
3606 if (unlikely(!p))
3607 goto out_overflow;
3608 *maxname = be32_to_cpup(p);
3609 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3610 }
3611 dprintk("%s: maxname=%u\n", __func__, *maxname);
3612 return status;
3613 out_overflow:
3614 print_overflow_msg(__func__, xdr);
3615 return -EIO;
3616 }
3617
3618 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3619 {
3620 __be32 *p;
3621 int status = 0;
3622
3623 *res = 1024;
3624 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3625 return -EIO;
3626 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3627 uint64_t maxread;
3628 p = xdr_inline_decode(xdr, 8);
3629 if (unlikely(!p))
3630 goto out_overflow;
3631 xdr_decode_hyper(p, &maxread);
3632 if (maxread > 0x7FFFFFFF)
3633 maxread = 0x7FFFFFFF;
3634 *res = (uint32_t)maxread;
3635 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3636 }
3637 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3638 return status;
3639 out_overflow:
3640 print_overflow_msg(__func__, xdr);
3641 return -EIO;
3642 }
3643
3644 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3645 {
3646 __be32 *p;
3647 int status = 0;
3648
3649 *res = 1024;
3650 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3651 return -EIO;
3652 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3653 uint64_t maxwrite;
3654 p = xdr_inline_decode(xdr, 8);
3655 if (unlikely(!p))
3656 goto out_overflow;
3657 xdr_decode_hyper(p, &maxwrite);
3658 if (maxwrite > 0x7FFFFFFF)
3659 maxwrite = 0x7FFFFFFF;
3660 *res = (uint32_t)maxwrite;
3661 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3662 }
3663 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3664 return status;
3665 out_overflow:
3666 print_overflow_msg(__func__, xdr);
3667 return -EIO;
3668 }
3669
3670 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3671 {
3672 uint32_t tmp;
3673 __be32 *p;
3674 int ret = 0;
3675
3676 *mode = 0;
3677 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3678 return -EIO;
3679 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3680 p = xdr_inline_decode(xdr, 4);
3681 if (unlikely(!p))
3682 goto out_overflow;
3683 tmp = be32_to_cpup(p);
3684 *mode = tmp & ~S_IFMT;
3685 bitmap[1] &= ~FATTR4_WORD1_MODE;
3686 ret = NFS_ATTR_FATTR_MODE;
3687 }
3688 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3689 return ret;
3690 out_overflow:
3691 print_overflow_msg(__func__, xdr);
3692 return -EIO;
3693 }
3694
3695 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3696 {
3697 __be32 *p;
3698 int ret = 0;
3699
3700 *nlink = 1;
3701 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3702 return -EIO;
3703 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3704 p = xdr_inline_decode(xdr, 4);
3705 if (unlikely(!p))
3706 goto out_overflow;
3707 *nlink = be32_to_cpup(p);
3708 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3709 ret = NFS_ATTR_FATTR_NLINK;
3710 }
3711 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3712 return ret;
3713 out_overflow:
3714 print_overflow_msg(__func__, xdr);
3715 return -EIO;
3716 }
3717
3718 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3719 const struct nfs_server *server, uint32_t *uid,
3720 struct nfs4_string *owner_name)
3721 {
3722 uint32_t len;
3723 __be32 *p;
3724 int ret = 0;
3725
3726 *uid = -2;
3727 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3728 return -EIO;
3729 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3730 p = xdr_inline_decode(xdr, 4);
3731 if (unlikely(!p))
3732 goto out_overflow;
3733 len = be32_to_cpup(p);
3734 p = xdr_inline_decode(xdr, len);
3735 if (unlikely(!p))
3736 goto out_overflow;
3737 if (owner_name != NULL) {
3738 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3739 if (owner_name->data != NULL) {
3740 owner_name->len = len;
3741 ret = NFS_ATTR_FATTR_OWNER_NAME;
3742 }
3743 } else if (len < XDR_MAX_NETOBJ) {
3744 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3745 ret = NFS_ATTR_FATTR_OWNER;
3746 else
3747 dprintk("%s: nfs_map_name_to_uid failed!\n",
3748 __func__);
3749 } else
3750 dprintk("%s: name too long (%u)!\n",
3751 __func__, len);
3752 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3753 }
3754 dprintk("%s: uid=%d\n", __func__, (int)*uid);
3755 return ret;
3756 out_overflow:
3757 print_overflow_msg(__func__, xdr);
3758 return -EIO;
3759 }
3760
3761 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3762 const struct nfs_server *server, uint32_t *gid,
3763 struct nfs4_string *group_name)
3764 {
3765 uint32_t len;
3766 __be32 *p;
3767 int ret = 0;
3768
3769 *gid = -2;
3770 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3771 return -EIO;
3772 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3773 p = xdr_inline_decode(xdr, 4);
3774 if (unlikely(!p))
3775 goto out_overflow;
3776 len = be32_to_cpup(p);
3777 p = xdr_inline_decode(xdr, len);
3778 if (unlikely(!p))
3779 goto out_overflow;
3780 if (group_name != NULL) {
3781 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3782 if (group_name->data != NULL) {
3783 group_name->len = len;
3784 ret = NFS_ATTR_FATTR_GROUP_NAME;
3785 }
3786 } else if (len < XDR_MAX_NETOBJ) {
3787 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3788 ret = NFS_ATTR_FATTR_GROUP;
3789 else
3790 dprintk("%s: nfs_map_group_to_gid failed!\n",
3791 __func__);
3792 } else
3793 dprintk("%s: name too long (%u)!\n",
3794 __func__, len);
3795 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3796 }
3797 dprintk("%s: gid=%d\n", __func__, (int)*gid);
3798 return ret;
3799 out_overflow:
3800 print_overflow_msg(__func__, xdr);
3801 return -EIO;
3802 }
3803
3804 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3805 {
3806 uint32_t major = 0, minor = 0;
3807 __be32 *p;
3808 int ret = 0;
3809
3810 *rdev = MKDEV(0,0);
3811 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3812 return -EIO;
3813 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3814 dev_t tmp;
3815
3816 p = xdr_inline_decode(xdr, 8);
3817 if (unlikely(!p))
3818 goto out_overflow;
3819 major = be32_to_cpup(p++);
3820 minor = be32_to_cpup(p);
3821 tmp = MKDEV(major, minor);
3822 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3823 *rdev = tmp;
3824 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3825 ret = NFS_ATTR_FATTR_RDEV;
3826 }
3827 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3828 return ret;
3829 out_overflow:
3830 print_overflow_msg(__func__, xdr);
3831 return -EIO;
3832 }
3833
3834 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3835 {
3836 __be32 *p;
3837 int status = 0;
3838
3839 *res = 0;
3840 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3841 return -EIO;
3842 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3843 p = xdr_inline_decode(xdr, 8);
3844 if (unlikely(!p))
3845 goto out_overflow;
3846 xdr_decode_hyper(p, res);
3847 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3848 }
3849 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3850 return status;
3851 out_overflow:
3852 print_overflow_msg(__func__, xdr);
3853 return -EIO;
3854 }
3855
3856 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3857 {
3858 __be32 *p;
3859 int status = 0;
3860
3861 *res = 0;
3862 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3863 return -EIO;
3864 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3865 p = xdr_inline_decode(xdr, 8);
3866 if (unlikely(!p))
3867 goto out_overflow;
3868 xdr_decode_hyper(p, res);
3869 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3870 }
3871 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3872 return status;
3873 out_overflow:
3874 print_overflow_msg(__func__, xdr);
3875 return -EIO;
3876 }
3877
3878 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3879 {
3880 __be32 *p;
3881 int status = 0;
3882
3883 *res = 0;
3884 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3885 return -EIO;
3886 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3887 p = xdr_inline_decode(xdr, 8);
3888 if (unlikely(!p))
3889 goto out_overflow;
3890 xdr_decode_hyper(p, res);
3891 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3892 }
3893 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3894 return status;
3895 out_overflow:
3896 print_overflow_msg(__func__, xdr);
3897 return -EIO;
3898 }
3899
3900 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3901 {
3902 __be32 *p;
3903 int ret = 0;
3904
3905 *used = 0;
3906 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3907 return -EIO;
3908 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3909 p = xdr_inline_decode(xdr, 8);
3910 if (unlikely(!p))
3911 goto out_overflow;
3912 xdr_decode_hyper(p, used);
3913 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3914 ret = NFS_ATTR_FATTR_SPACE_USED;
3915 }
3916 dprintk("%s: space used=%Lu\n", __func__,
3917 (unsigned long long)*used);
3918 return ret;
3919 out_overflow:
3920 print_overflow_msg(__func__, xdr);
3921 return -EIO;
3922 }
3923
3924 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3925 {
3926 __be32 *p;
3927 uint64_t sec;
3928 uint32_t nsec;
3929
3930 p = xdr_inline_decode(xdr, 12);
3931 if (unlikely(!p))
3932 goto out_overflow;
3933 p = xdr_decode_hyper(p, &sec);
3934 nsec = be32_to_cpup(p);
3935 time->tv_sec = (time_t)sec;
3936 time->tv_nsec = (long)nsec;
3937 return 0;
3938 out_overflow:
3939 print_overflow_msg(__func__, xdr);
3940 return -EIO;
3941 }
3942
3943 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3944 {
3945 int status = 0;
3946
3947 time->tv_sec = 0;
3948 time->tv_nsec = 0;
3949 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3950 return -EIO;
3951 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3952 status = decode_attr_time(xdr, time);
3953 if (status == 0)
3954 status = NFS_ATTR_FATTR_ATIME;
3955 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3956 }
3957 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3958 return status;
3959 }
3960
3961 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3962 {
3963 int status = 0;
3964
3965 time->tv_sec = 0;
3966 time->tv_nsec = 0;
3967 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3968 return -EIO;
3969 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3970 status = decode_attr_time(xdr, time);
3971 if (status == 0)
3972 status = NFS_ATTR_FATTR_CTIME;
3973 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3974 }
3975 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3976 return status;
3977 }
3978
3979 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3980 struct timespec *time)
3981 {
3982 int status = 0;
3983
3984 time->tv_sec = 0;
3985 time->tv_nsec = 0;
3986 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3987 return -EIO;
3988 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3989 status = decode_attr_time(xdr, time);
3990 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3991 }
3992 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3993 (long)time->tv_nsec);
3994 return status;
3995 }
3996
3997 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3998 {
3999 int status = 0;
4000
4001 time->tv_sec = 0;
4002 time->tv_nsec = 0;
4003 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4004 return -EIO;
4005 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4006 status = decode_attr_time(xdr, time);
4007 if (status == 0)
4008 status = NFS_ATTR_FATTR_MTIME;
4009 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4010 }
4011 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4012 return status;
4013 }
4014
4015 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
4016 {
4017 unsigned int attrwords = XDR_QUADLEN(attrlen);
4018 unsigned int nwords = xdr->p - savep;
4019
4020 if (unlikely(attrwords != nwords)) {
4021 dprintk("%s: server returned incorrect attribute length: "
4022 "%u %c %u\n",
4023 __func__,
4024 attrwords << 2,
4025 (attrwords < nwords) ? '<' : '>',
4026 nwords << 2);
4027 return -EIO;
4028 }
4029 return 0;
4030 }
4031
4032 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4033 {
4034 __be32 *p;
4035
4036 p = xdr_inline_decode(xdr, 20);
4037 if (unlikely(!p))
4038 goto out_overflow;
4039 cinfo->atomic = be32_to_cpup(p++);
4040 p = xdr_decode_hyper(p, &cinfo->before);
4041 xdr_decode_hyper(p, &cinfo->after);
4042 return 0;
4043 out_overflow:
4044 print_overflow_msg(__func__, xdr);
4045 return -EIO;
4046 }
4047
4048 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4049 {
4050 __be32 *p;
4051 uint32_t supp, acc;
4052 int status;
4053
4054 status = decode_op_hdr(xdr, OP_ACCESS);
4055 if (status)
4056 return status;
4057 p = xdr_inline_decode(xdr, 8);
4058 if (unlikely(!p))
4059 goto out_overflow;
4060 supp = be32_to_cpup(p++);
4061 acc = be32_to_cpup(p);
4062 access->supported = supp;
4063 access->access = acc;
4064 return 0;
4065 out_overflow:
4066 print_overflow_msg(__func__, xdr);
4067 return -EIO;
4068 }
4069
4070 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4071 {
4072 __be32 *p;
4073
4074 p = xdr_inline_decode(xdr, len);
4075 if (likely(p)) {
4076 memcpy(buf, p, len);
4077 return 0;
4078 }
4079 print_overflow_msg(__func__, xdr);
4080 return -EIO;
4081 }
4082
4083 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4084 {
4085 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4086 }
4087
4088 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4089 {
4090 int status;
4091
4092 status = decode_op_hdr(xdr, OP_CLOSE);
4093 if (status != -EIO)
4094 nfs_increment_open_seqid(status, res->seqid);
4095 if (!status)
4096 status = decode_stateid(xdr, &res->stateid);
4097 return status;
4098 }
4099
4100 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4101 {
4102 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4103 }
4104
4105 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
4106 {
4107 int status;
4108
4109 status = decode_op_hdr(xdr, OP_COMMIT);
4110 if (!status)
4111 status = decode_verifier(xdr, res->verf->verifier);
4112 return status;
4113 }
4114
4115 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4116 {
4117 __be32 *p;
4118 uint32_t bmlen;
4119 int status;
4120
4121 status = decode_op_hdr(xdr, OP_CREATE);
4122 if (status)
4123 return status;
4124 if ((status = decode_change_info(xdr, cinfo)))
4125 return status;
4126 p = xdr_inline_decode(xdr, 4);
4127 if (unlikely(!p))
4128 goto out_overflow;
4129 bmlen = be32_to_cpup(p);
4130 p = xdr_inline_decode(xdr, bmlen << 2);
4131 if (likely(p))
4132 return 0;
4133 out_overflow:
4134 print_overflow_msg(__func__, xdr);
4135 return -EIO;
4136 }
4137
4138 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4139 {
4140 __be32 *savep;
4141 uint32_t attrlen, bitmap[3] = {0};
4142 int status;
4143
4144 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4145 goto xdr_error;
4146 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4147 goto xdr_error;
4148 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4149 goto xdr_error;
4150 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4151 goto xdr_error;
4152 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4153 &res->fh_expire_type)) != 0)
4154 goto xdr_error;
4155 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4156 goto xdr_error;
4157 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4158 goto xdr_error;
4159 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4160 goto xdr_error;
4161 status = verify_attr_len(xdr, savep, attrlen);
4162 xdr_error:
4163 dprintk("%s: xdr returned %d!\n", __func__, -status);
4164 return status;
4165 }
4166
4167 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4168 {
4169 __be32 *savep;
4170 uint32_t attrlen, bitmap[3] = {0};
4171 int status;
4172
4173 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4174 goto xdr_error;
4175 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4176 goto xdr_error;
4177 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4178 goto xdr_error;
4179
4180 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4181 goto xdr_error;
4182 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4183 goto xdr_error;
4184 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4185 goto xdr_error;
4186 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4187 goto xdr_error;
4188 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4189 goto xdr_error;
4190 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4191 goto xdr_error;
4192
4193 status = verify_attr_len(xdr, savep, attrlen);
4194 xdr_error:
4195 dprintk("%s: xdr returned %d!\n", __func__, -status);
4196 return status;
4197 }
4198
4199 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4200 {
4201 __be32 *savep;
4202 uint32_t attrlen, bitmap[3] = {0};
4203 int status;
4204
4205 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4206 goto xdr_error;
4207 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4208 goto xdr_error;
4209 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4210 goto xdr_error;
4211
4212 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4213 goto xdr_error;
4214 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4215 goto xdr_error;
4216
4217 status = verify_attr_len(xdr, savep, attrlen);
4218 xdr_error:
4219 dprintk("%s: xdr returned %d!\n", __func__, -status);
4220 return status;
4221 }
4222
4223 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4224 struct nfs_fattr *fattr, struct nfs_fh *fh,
4225 struct nfs4_fs_locations *fs_loc,
4226 const struct nfs_server *server)
4227 {
4228 int status;
4229 umode_t fmode = 0;
4230 uint32_t type;
4231 int32_t err;
4232
4233 status = decode_attr_type(xdr, bitmap, &type);
4234 if (status < 0)
4235 goto xdr_error;
4236 fattr->mode = 0;
4237 if (status != 0) {
4238 fattr->mode |= nfs_type2fmt[type];
4239 fattr->valid |= status;
4240 }
4241
4242 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4243 if (status < 0)
4244 goto xdr_error;
4245 fattr->valid |= status;
4246
4247 status = decode_attr_size(xdr, bitmap, &fattr->size);
4248 if (status < 0)
4249 goto xdr_error;
4250 fattr->valid |= status;
4251
4252 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4253 if (status < 0)
4254 goto xdr_error;
4255 fattr->valid |= status;
4256
4257 err = 0;
4258 status = decode_attr_error(xdr, bitmap, &err);
4259 if (status < 0)
4260 goto xdr_error;
4261 if (err == -NFS4ERR_WRONGSEC)
4262 nfs_fixup_secinfo_attributes(fattr, fh);
4263
4264 status = decode_attr_filehandle(xdr, bitmap, fh);
4265 if (status < 0)
4266 goto xdr_error;
4267
4268 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4269 if (status < 0)
4270 goto xdr_error;
4271 fattr->valid |= status;
4272
4273 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4274 if (status < 0)
4275 goto xdr_error;
4276 fattr->valid |= status;
4277
4278 status = decode_attr_mode(xdr, bitmap, &fmode);
4279 if (status < 0)
4280 goto xdr_error;
4281 if (status != 0) {
4282 fattr->mode |= fmode;
4283 fattr->valid |= status;
4284 }
4285
4286 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4287 if (status < 0)
4288 goto xdr_error;
4289 fattr->valid |= status;
4290
4291 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4292 if (status < 0)
4293 goto xdr_error;
4294 fattr->valid |= status;
4295
4296 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4297 if (status < 0)
4298 goto xdr_error;
4299 fattr->valid |= status;
4300
4301 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4302 if (status < 0)
4303 goto xdr_error;
4304 fattr->valid |= status;
4305
4306 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4307 if (status < 0)
4308 goto xdr_error;
4309 fattr->valid |= status;
4310
4311 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4312 if (status < 0)
4313 goto xdr_error;
4314 fattr->valid |= status;
4315
4316 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4317 if (status < 0)
4318 goto xdr_error;
4319 fattr->valid |= status;
4320
4321 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4322 if (status < 0)
4323 goto xdr_error;
4324 fattr->valid |= status;
4325
4326 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4327 if (status < 0)
4328 goto xdr_error;
4329 fattr->valid |= status;
4330
4331 xdr_error:
4332 dprintk("%s: xdr returned %d\n", __func__, -status);
4333 return status;
4334 }
4335
4336 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4337 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4338 const struct nfs_server *server)
4339 {
4340 __be32 *savep;
4341 uint32_t attrlen,
4342 bitmap[3] = {0};
4343 int status;
4344
4345 status = decode_op_hdr(xdr, OP_GETATTR);
4346 if (status < 0)
4347 goto xdr_error;
4348
4349 status = decode_attr_bitmap(xdr, bitmap);
4350 if (status < 0)
4351 goto xdr_error;
4352
4353 status = decode_attr_length(xdr, &attrlen, &savep);
4354 if (status < 0)
4355 goto xdr_error;
4356
4357 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4358 if (status < 0)
4359 goto xdr_error;
4360
4361 status = verify_attr_len(xdr, savep, attrlen);
4362 xdr_error:
4363 dprintk("%s: xdr returned %d\n", __func__, -status);
4364 return status;
4365 }
4366
4367 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4368 const struct nfs_server *server)
4369 {
4370 return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4371 }
4372
4373 /*
4374 * Decode potentially multiple layout types. Currently we only support
4375 * one layout driver per file system.
4376 */
4377 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4378 uint32_t *layouttype)
4379 {
4380 uint32_t *p;
4381 int num;
4382
4383 p = xdr_inline_decode(xdr, 4);
4384 if (unlikely(!p))
4385 goto out_overflow;
4386 num = be32_to_cpup(p);
4387
4388 /* pNFS is not supported by the underlying file system */
4389 if (num == 0) {
4390 *layouttype = 0;
4391 return 0;
4392 }
4393 if (num > 1)
4394 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4395 "drivers per filesystem not supported\n", __func__);
4396
4397 /* Decode and set first layout type, move xdr->p past unused types */
4398 p = xdr_inline_decode(xdr, num * 4);
4399 if (unlikely(!p))
4400 goto out_overflow;
4401 *layouttype = be32_to_cpup(p);
4402 return 0;
4403 out_overflow:
4404 print_overflow_msg(__func__, xdr);
4405 return -EIO;
4406 }
4407
4408 /*
4409 * The type of file system exported.
4410 * Note we must ensure that layouttype is set in any non-error case.
4411 */
4412 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4413 uint32_t *layouttype)
4414 {
4415 int status = 0;
4416
4417 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4418 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4419 return -EIO;
4420 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4421 status = decode_first_pnfs_layout_type(xdr, layouttype);
4422 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4423 } else
4424 *layouttype = 0;
4425 return status;
4426 }
4427
4428 /*
4429 * The prefered block size for layout directed io
4430 */
4431 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4432 uint32_t *res)
4433 {
4434 __be32 *p;
4435
4436 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4437 *res = 0;
4438 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4439 p = xdr_inline_decode(xdr, 4);
4440 if (unlikely(!p)) {
4441 print_overflow_msg(__func__, xdr);
4442 return -EIO;
4443 }
4444 *res = be32_to_cpup(p);
4445 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4446 }
4447 return 0;
4448 }
4449
4450 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4451 {
4452 __be32 *savep;
4453 uint32_t attrlen, bitmap[3];
4454 int status;
4455
4456 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4457 goto xdr_error;
4458 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4459 goto xdr_error;
4460 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4461 goto xdr_error;
4462
4463 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4464
4465 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4466 goto xdr_error;
4467 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4468 goto xdr_error;
4469 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4470 goto xdr_error;
4471 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4472 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4473 goto xdr_error;
4474 fsinfo->wtpref = fsinfo->wtmax;
4475 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4476 if (status != 0)
4477 goto xdr_error;
4478 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4479 if (status != 0)
4480 goto xdr_error;
4481 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4482 if (status)
4483 goto xdr_error;
4484
4485 status = verify_attr_len(xdr, savep, attrlen);
4486 xdr_error:
4487 dprintk("%s: xdr returned %d!\n", __func__, -status);
4488 return status;
4489 }
4490
4491 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4492 {
4493 __be32 *p;
4494 uint32_t len;
4495 int status;
4496
4497 /* Zero handle first to allow comparisons */
4498 memset(fh, 0, sizeof(*fh));
4499
4500 status = decode_op_hdr(xdr, OP_GETFH);
4501 if (status)
4502 return status;
4503
4504 p = xdr_inline_decode(xdr, 4);
4505 if (unlikely(!p))
4506 goto out_overflow;
4507 len = be32_to_cpup(p);
4508 if (len > NFS4_FHSIZE)
4509 return -EIO;
4510 fh->size = len;
4511 p = xdr_inline_decode(xdr, len);
4512 if (unlikely(!p))
4513 goto out_overflow;
4514 memcpy(fh->data, p, len);
4515 return 0;
4516 out_overflow:
4517 print_overflow_msg(__func__, xdr);
4518 return -EIO;
4519 }
4520
4521 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4522 {
4523 int status;
4524
4525 status = decode_op_hdr(xdr, OP_LINK);
4526 if (status)
4527 return status;
4528 return decode_change_info(xdr, cinfo);
4529 }
4530
4531 /*
4532 * We create the owner, so we know a proper owner.id length is 4.
4533 */
4534 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4535 {
4536 uint64_t offset, length, clientid;
4537 __be32 *p;
4538 uint32_t namelen, type;
4539
4540 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4541 if (unlikely(!p))
4542 goto out_overflow;
4543 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4544 p = xdr_decode_hyper(p, &length);
4545 type = be32_to_cpup(p++); /* 4 byte read */
4546 if (fl != NULL) { /* manipulate file lock */
4547 fl->fl_start = (loff_t)offset;
4548 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4549 if (length == ~(uint64_t)0)
4550 fl->fl_end = OFFSET_MAX;
4551 fl->fl_type = F_WRLCK;
4552 if (type & 1)
4553 fl->fl_type = F_RDLCK;
4554 fl->fl_pid = 0;
4555 }
4556 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4557 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4558 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4559 if (likely(p))
4560 return -NFS4ERR_DENIED;
4561 out_overflow:
4562 print_overflow_msg(__func__, xdr);
4563 return -EIO;
4564 }
4565
4566 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4567 {
4568 int status;
4569
4570 status = decode_op_hdr(xdr, OP_LOCK);
4571 if (status == -EIO)
4572 goto out;
4573 if (status == 0) {
4574 status = decode_stateid(xdr, &res->stateid);
4575 if (unlikely(status))
4576 goto out;
4577 } else if (status == -NFS4ERR_DENIED)
4578 status = decode_lock_denied(xdr, NULL);
4579 if (res->open_seqid != NULL)
4580 nfs_increment_open_seqid(status, res->open_seqid);
4581 nfs_increment_lock_seqid(status, res->lock_seqid);
4582 out:
4583 return status;
4584 }
4585
4586 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4587 {
4588 int status;
4589 status = decode_op_hdr(xdr, OP_LOCKT);
4590 if (status == -NFS4ERR_DENIED)
4591 return decode_lock_denied(xdr, res->denied);
4592 return status;
4593 }
4594
4595 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4596 {
4597 int status;
4598
4599 status = decode_op_hdr(xdr, OP_LOCKU);
4600 if (status != -EIO)
4601 nfs_increment_lock_seqid(status, res->seqid);
4602 if (status == 0)
4603 status = decode_stateid(xdr, &res->stateid);
4604 return status;
4605 }
4606
4607 static int decode_release_lockowner(struct xdr_stream *xdr)
4608 {
4609 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4610 }
4611
4612 static int decode_lookup(struct xdr_stream *xdr)
4613 {
4614 return decode_op_hdr(xdr, OP_LOOKUP);
4615 }
4616
4617 /* This is too sick! */
4618 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4619 {
4620 __be32 *p;
4621 uint32_t limit_type, nblocks, blocksize;
4622
4623 p = xdr_inline_decode(xdr, 12);
4624 if (unlikely(!p))
4625 goto out_overflow;
4626 limit_type = be32_to_cpup(p++);
4627 switch (limit_type) {
4628 case 1:
4629 xdr_decode_hyper(p, maxsize);
4630 break;
4631 case 2:
4632 nblocks = be32_to_cpup(p++);
4633 blocksize = be32_to_cpup(p);
4634 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4635 }
4636 return 0;
4637 out_overflow:
4638 print_overflow_msg(__func__, xdr);
4639 return -EIO;
4640 }
4641
4642 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4643 {
4644 __be32 *p;
4645 uint32_t delegation_type;
4646 int status;
4647
4648 p = xdr_inline_decode(xdr, 4);
4649 if (unlikely(!p))
4650 goto out_overflow;
4651 delegation_type = be32_to_cpup(p);
4652 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4653 res->delegation_type = 0;
4654 return 0;
4655 }
4656 status = decode_stateid(xdr, &res->delegation);
4657 if (unlikely(status))
4658 return status;
4659 p = xdr_inline_decode(xdr, 4);
4660 if (unlikely(!p))
4661 goto out_overflow;
4662 res->do_recall = be32_to_cpup(p);
4663
4664 switch (delegation_type) {
4665 case NFS4_OPEN_DELEGATE_READ:
4666 res->delegation_type = FMODE_READ;
4667 break;
4668 case NFS4_OPEN_DELEGATE_WRITE:
4669 res->delegation_type = FMODE_WRITE|FMODE_READ;
4670 if (decode_space_limit(xdr, &res->maxsize) < 0)
4671 return -EIO;
4672 }
4673 return decode_ace(xdr, NULL, res->server->nfs_client);
4674 out_overflow:
4675 print_overflow_msg(__func__, xdr);
4676 return -EIO;
4677 }
4678
4679 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4680 {
4681 __be32 *p;
4682 uint32_t savewords, bmlen, i;
4683 int status;
4684
4685 status = decode_op_hdr(xdr, OP_OPEN);
4686 if (status != -EIO)
4687 nfs_increment_open_seqid(status, res->seqid);
4688 if (!status)
4689 status = decode_stateid(xdr, &res->stateid);
4690 if (unlikely(status))
4691 return status;
4692
4693 decode_change_info(xdr, &res->cinfo);
4694
4695 p = xdr_inline_decode(xdr, 8);
4696 if (unlikely(!p))
4697 goto out_overflow;
4698 res->rflags = be32_to_cpup(p++);
4699 bmlen = be32_to_cpup(p);
4700 if (bmlen > 10)
4701 goto xdr_error;
4702
4703 p = xdr_inline_decode(xdr, bmlen << 2);
4704 if (unlikely(!p))
4705 goto out_overflow;
4706 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4707 for (i = 0; i < savewords; ++i)
4708 res->attrset[i] = be32_to_cpup(p++);
4709 for (; i < NFS4_BITMAP_SIZE; i++)
4710 res->attrset[i] = 0;
4711
4712 return decode_delegation(xdr, res);
4713 xdr_error:
4714 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4715 return -EIO;
4716 out_overflow:
4717 print_overflow_msg(__func__, xdr);
4718 return -EIO;
4719 }
4720
4721 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4722 {
4723 int status;
4724
4725 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4726 if (status != -EIO)
4727 nfs_increment_open_seqid(status, res->seqid);
4728 if (!status)
4729 status = decode_stateid(xdr, &res->stateid);
4730 return status;
4731 }
4732
4733 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4734 {
4735 int status;
4736
4737 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4738 if (status != -EIO)
4739 nfs_increment_open_seqid(status, res->seqid);
4740 if (!status)
4741 status = decode_stateid(xdr, &res->stateid);
4742 return status;
4743 }
4744
4745 static int decode_putfh(struct xdr_stream *xdr)
4746 {
4747 return decode_op_hdr(xdr, OP_PUTFH);
4748 }
4749
4750 static int decode_putrootfh(struct xdr_stream *xdr)
4751 {
4752 return decode_op_hdr(xdr, OP_PUTROOTFH);
4753 }
4754
4755 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4756 {
4757 struct kvec *iov = req->rq_rcv_buf.head;
4758 __be32 *p;
4759 uint32_t count, eof, recvd, hdrlen;
4760 int status;
4761
4762 status = decode_op_hdr(xdr, OP_READ);
4763 if (status)
4764 return status;
4765 p = xdr_inline_decode(xdr, 8);
4766 if (unlikely(!p))
4767 goto out_overflow;
4768 eof = be32_to_cpup(p++);
4769 count = be32_to_cpup(p);
4770 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4771 recvd = req->rq_rcv_buf.len - hdrlen;
4772 if (count > recvd) {
4773 dprintk("NFS: server cheating in read reply: "
4774 "count %u > recvd %u\n", count, recvd);
4775 count = recvd;
4776 eof = 0;
4777 }
4778 xdr_read_pages(xdr, count);
4779 res->eof = eof;
4780 res->count = count;
4781 return 0;
4782 out_overflow:
4783 print_overflow_msg(__func__, xdr);
4784 return -EIO;
4785 }
4786
4787 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4788 {
4789 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4790 struct kvec *iov = rcvbuf->head;
4791 size_t hdrlen;
4792 u32 recvd, pglen = rcvbuf->page_len;
4793 int status;
4794 __be32 verf[2];
4795
4796 status = decode_op_hdr(xdr, OP_READDIR);
4797 if (!status)
4798 status = decode_verifier(xdr, readdir->verifier.data);
4799 if (unlikely(status))
4800 return status;
4801 memcpy(verf, readdir->verifier.data, sizeof(verf));
4802 dprintk("%s: verifier = %08x:%08x\n",
4803 __func__, verf[0], verf[1]);
4804
4805 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4806 recvd = rcvbuf->len - hdrlen;
4807 if (pglen > recvd)
4808 pglen = recvd;
4809 xdr_read_pages(xdr, pglen);
4810
4811
4812 return pglen;
4813 }
4814
4815 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4816 {
4817 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4818 struct kvec *iov = rcvbuf->head;
4819 size_t hdrlen;
4820 u32 len, recvd;
4821 __be32 *p;
4822 int status;
4823
4824 status = decode_op_hdr(xdr, OP_READLINK);
4825 if (status)
4826 return status;
4827
4828 /* Convert length of symlink */
4829 p = xdr_inline_decode(xdr, 4);
4830 if (unlikely(!p))
4831 goto out_overflow;
4832 len = be32_to_cpup(p);
4833 if (len >= rcvbuf->page_len || len <= 0) {
4834 dprintk("nfs: server returned giant symlink!\n");
4835 return -ENAMETOOLONG;
4836 }
4837 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4838 recvd = req->rq_rcv_buf.len - hdrlen;
4839 if (recvd < len) {
4840 dprintk("NFS: server cheating in readlink reply: "
4841 "count %u > recvd %u\n", len, recvd);
4842 return -EIO;
4843 }
4844 xdr_read_pages(xdr, len);
4845 /*
4846 * The XDR encode routine has set things up so that
4847 * the link text will be copied directly into the
4848 * buffer. We just have to do overflow-checking,
4849 * and and null-terminate the text (the VFS expects
4850 * null-termination).
4851 */
4852 xdr_terminate_string(rcvbuf, len);
4853 return 0;
4854 out_overflow:
4855 print_overflow_msg(__func__, xdr);
4856 return -EIO;
4857 }
4858
4859 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4860 {
4861 int status;
4862
4863 status = decode_op_hdr(xdr, OP_REMOVE);
4864 if (status)
4865 goto out;
4866 status = decode_change_info(xdr, cinfo);
4867 out:
4868 return status;
4869 }
4870
4871 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4872 struct nfs4_change_info *new_cinfo)
4873 {
4874 int status;
4875
4876 status = decode_op_hdr(xdr, OP_RENAME);
4877 if (status)
4878 goto out;
4879 if ((status = decode_change_info(xdr, old_cinfo)))
4880 goto out;
4881 status = decode_change_info(xdr, new_cinfo);
4882 out:
4883 return status;
4884 }
4885
4886 static int decode_renew(struct xdr_stream *xdr)
4887 {
4888 return decode_op_hdr(xdr, OP_RENEW);
4889 }
4890
4891 static int
4892 decode_restorefh(struct xdr_stream *xdr)
4893 {
4894 return decode_op_hdr(xdr, OP_RESTOREFH);
4895 }
4896
4897 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4898 struct nfs_getaclres *res)
4899 {
4900 __be32 *savep, *bm_p;
4901 uint32_t attrlen,
4902 bitmap[3] = {0};
4903 struct kvec *iov = req->rq_rcv_buf.head;
4904 int status;
4905
4906 res->acl_len = 0;
4907 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4908 goto out;
4909 bm_p = xdr->p;
4910 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4911 goto out;
4912 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4913 goto out;
4914
4915 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4916 return -EIO;
4917 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4918 size_t hdrlen;
4919 u32 recvd;
4920
4921 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
4922 * are stored with the acl data to handle the problem of
4923 * variable length bitmaps.*/
4924 xdr->p = bm_p;
4925 res->acl_data_offset = be32_to_cpup(bm_p) + 2;
4926 res->acl_data_offset <<= 2;
4927
4928 /* We ignore &savep and don't do consistency checks on
4929 * the attr length. Let userspace figure it out.... */
4930 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4931 attrlen += res->acl_data_offset;
4932 recvd = req->rq_rcv_buf.len - hdrlen;
4933 if (attrlen > recvd) {
4934 if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
4935 /* getxattr interface called with a NULL buf */
4936 res->acl_len = attrlen;
4937 goto out;
4938 }
4939 dprintk("NFS: acl reply: attrlen %u > recvd %u\n",
4940 attrlen, recvd);
4941 return -EINVAL;
4942 }
4943 xdr_read_pages(xdr, attrlen);
4944 res->acl_len = attrlen;
4945 } else
4946 status = -EOPNOTSUPP;
4947
4948 out:
4949 return status;
4950 }
4951
4952 static int
4953 decode_savefh(struct xdr_stream *xdr)
4954 {
4955 return decode_op_hdr(xdr, OP_SAVEFH);
4956 }
4957
4958 static int decode_setattr(struct xdr_stream *xdr)
4959 {
4960 __be32 *p;
4961 uint32_t bmlen;
4962 int status;
4963
4964 status = decode_op_hdr(xdr, OP_SETATTR);
4965 if (status)
4966 return status;
4967 p = xdr_inline_decode(xdr, 4);
4968 if (unlikely(!p))
4969 goto out_overflow;
4970 bmlen = be32_to_cpup(p);
4971 p = xdr_inline_decode(xdr, bmlen << 2);
4972 if (likely(p))
4973 return 0;
4974 out_overflow:
4975 print_overflow_msg(__func__, xdr);
4976 return -EIO;
4977 }
4978
4979 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4980 {
4981 __be32 *p;
4982 uint32_t opnum;
4983 int32_t nfserr;
4984
4985 p = xdr_inline_decode(xdr, 8);
4986 if (unlikely(!p))
4987 goto out_overflow;
4988 opnum = be32_to_cpup(p++);
4989 if (opnum != OP_SETCLIENTID) {
4990 dprintk("nfs: decode_setclientid: Server returned operation"
4991 " %d\n", opnum);
4992 return -EIO;
4993 }
4994 nfserr = be32_to_cpup(p);
4995 if (nfserr == NFS_OK) {
4996 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4997 if (unlikely(!p))
4998 goto out_overflow;
4999 p = xdr_decode_hyper(p, &res->clientid);
5000 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5001 } else if (nfserr == NFSERR_CLID_INUSE) {
5002 uint32_t len;
5003
5004 /* skip netid string */
5005 p = xdr_inline_decode(xdr, 4);
5006 if (unlikely(!p))
5007 goto out_overflow;
5008 len = be32_to_cpup(p);
5009 p = xdr_inline_decode(xdr, len);
5010 if (unlikely(!p))
5011 goto out_overflow;
5012
5013 /* skip uaddr string */
5014 p = xdr_inline_decode(xdr, 4);
5015 if (unlikely(!p))
5016 goto out_overflow;
5017 len = be32_to_cpup(p);
5018 p = xdr_inline_decode(xdr, len);
5019 if (unlikely(!p))
5020 goto out_overflow;
5021 return -NFSERR_CLID_INUSE;
5022 } else
5023 return nfs4_stat_to_errno(nfserr);
5024
5025 return 0;
5026 out_overflow:
5027 print_overflow_msg(__func__, xdr);
5028 return -EIO;
5029 }
5030
5031 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5032 {
5033 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5034 }
5035
5036 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5037 {
5038 __be32 *p;
5039 int status;
5040
5041 status = decode_op_hdr(xdr, OP_WRITE);
5042 if (status)
5043 return status;
5044
5045 p = xdr_inline_decode(xdr, 16);
5046 if (unlikely(!p))
5047 goto out_overflow;
5048 res->count = be32_to_cpup(p++);
5049 res->verf->committed = be32_to_cpup(p++);
5050 memcpy(res->verf->verifier, p, NFS4_VERIFIER_SIZE);
5051 return 0;
5052 out_overflow:
5053 print_overflow_msg(__func__, xdr);
5054 return -EIO;
5055 }
5056
5057 static int decode_delegreturn(struct xdr_stream *xdr)
5058 {
5059 return decode_op_hdr(xdr, OP_DELEGRETURN);
5060 }
5061
5062 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5063 {
5064 __be32 *p;
5065
5066 p = xdr_inline_decode(xdr, 4);
5067 if (unlikely(!p))
5068 goto out_overflow;
5069 flavor->gss.sec_oid4.len = be32_to_cpup(p);
5070 if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5071 goto out_err;
5072
5073 p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5074 if (unlikely(!p))
5075 goto out_overflow;
5076 memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5077
5078 p = xdr_inline_decode(xdr, 8);
5079 if (unlikely(!p))
5080 goto out_overflow;
5081 flavor->gss.qop4 = be32_to_cpup(p++);
5082 flavor->gss.service = be32_to_cpup(p);
5083
5084 return 0;
5085
5086 out_overflow:
5087 print_overflow_msg(__func__, xdr);
5088 return -EIO;
5089 out_err:
5090 return -EINVAL;
5091 }
5092
5093 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5094 {
5095 struct nfs4_secinfo_flavor *sec_flavor;
5096 int status;
5097 __be32 *p;
5098 int i, num_flavors;
5099
5100 status = decode_op_hdr(xdr, OP_SECINFO);
5101 if (status)
5102 goto out;
5103 p = xdr_inline_decode(xdr, 4);
5104 if (unlikely(!p))
5105 goto out_overflow;
5106
5107 res->flavors->num_flavors = 0;
5108 num_flavors = be32_to_cpup(p);
5109
5110 for (i = 0; i < num_flavors; i++) {
5111 sec_flavor = &res->flavors->flavors[i];
5112 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5113 break;
5114
5115 p = xdr_inline_decode(xdr, 4);
5116 if (unlikely(!p))
5117 goto out_overflow;
5118 sec_flavor->flavor = be32_to_cpup(p);
5119
5120 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5121 status = decode_secinfo_gss(xdr, sec_flavor);
5122 if (status)
5123 goto out;
5124 }
5125 res->flavors->num_flavors++;
5126 }
5127
5128 out:
5129 return status;
5130 out_overflow:
5131 print_overflow_msg(__func__, xdr);
5132 return -EIO;
5133 }
5134
5135 #if defined(CONFIG_NFS_V4_1)
5136 static int decode_exchange_id(struct xdr_stream *xdr,
5137 struct nfs41_exchange_id_res *res)
5138 {
5139 __be32 *p;
5140 uint32_t dummy;
5141 char *dummy_str;
5142 int status;
5143 struct nfs_client *clp = res->client;
5144 uint32_t impl_id_count;
5145
5146 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5147 if (status)
5148 return status;
5149
5150 p = xdr_inline_decode(xdr, 8);
5151 if (unlikely(!p))
5152 goto out_overflow;
5153 xdr_decode_hyper(p, &clp->cl_clientid);
5154 p = xdr_inline_decode(xdr, 12);
5155 if (unlikely(!p))
5156 goto out_overflow;
5157 clp->cl_seqid = be32_to_cpup(p++);
5158 clp->cl_exchange_flags = be32_to_cpup(p++);
5159
5160 /* We ask for SP4_NONE */
5161 dummy = be32_to_cpup(p);
5162 if (dummy != SP4_NONE)
5163 return -EIO;
5164
5165 /* Throw away minor_id */
5166 p = xdr_inline_decode(xdr, 8);
5167 if (unlikely(!p))
5168 goto out_overflow;
5169
5170 /* Throw away Major id */
5171 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5172 if (unlikely(status))
5173 return status;
5174
5175 /* Save server_scope */
5176 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5177 if (unlikely(status))
5178 return status;
5179
5180 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5181 return -EIO;
5182
5183 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5184 res->server_scope->server_scope_sz = dummy;
5185
5186 /* Implementation Id */
5187 p = xdr_inline_decode(xdr, 4);
5188 if (unlikely(!p))
5189 goto out_overflow;
5190 impl_id_count = be32_to_cpup(p++);
5191
5192 if (impl_id_count) {
5193 /* nii_domain */
5194 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5195 if (unlikely(status))
5196 return status;
5197 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5198 return -EIO;
5199 memcpy(res->impl_id->domain, dummy_str, dummy);
5200
5201 /* nii_name */
5202 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5203 if (unlikely(status))
5204 return status;
5205 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5206 return -EIO;
5207 memcpy(res->impl_id->name, dummy_str, dummy);
5208
5209 /* nii_date */
5210 p = xdr_inline_decode(xdr, 12);
5211 if (unlikely(!p))
5212 goto out_overflow;
5213 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5214 res->impl_id->date.nseconds = be32_to_cpup(p);
5215
5216 /* if there's more than one entry, ignore the rest */
5217 }
5218 return 0;
5219 out_overflow:
5220 print_overflow_msg(__func__, xdr);
5221 return -EIO;
5222 }
5223
5224 static int decode_chan_attrs(struct xdr_stream *xdr,
5225 struct nfs4_channel_attrs *attrs)
5226 {
5227 __be32 *p;
5228 u32 nr_attrs, val;
5229
5230 p = xdr_inline_decode(xdr, 28);
5231 if (unlikely(!p))
5232 goto out_overflow;
5233 val = be32_to_cpup(p++); /* headerpadsz */
5234 if (val)
5235 return -EINVAL; /* no support for header padding yet */
5236 attrs->max_rqst_sz = be32_to_cpup(p++);
5237 attrs->max_resp_sz = be32_to_cpup(p++);
5238 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5239 attrs->max_ops = be32_to_cpup(p++);
5240 attrs->max_reqs = be32_to_cpup(p++);
5241 nr_attrs = be32_to_cpup(p);
5242 if (unlikely(nr_attrs > 1)) {
5243 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5244 "count %u\n", __func__, nr_attrs);
5245 return -EINVAL;
5246 }
5247 if (nr_attrs == 1) {
5248 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5249 if (unlikely(!p))
5250 goto out_overflow;
5251 }
5252 return 0;
5253 out_overflow:
5254 print_overflow_msg(__func__, xdr);
5255 return -EIO;
5256 }
5257
5258 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5259 {
5260 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5261 }
5262
5263 static int decode_create_session(struct xdr_stream *xdr,
5264 struct nfs41_create_session_res *res)
5265 {
5266 __be32 *p;
5267 int status;
5268 struct nfs_client *clp = res->client;
5269 struct nfs4_session *session = clp->cl_session;
5270
5271 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5272 if (!status)
5273 status = decode_sessionid(xdr, &session->sess_id);
5274 if (unlikely(status))
5275 return status;
5276
5277 /* seqid, flags */
5278 p = xdr_inline_decode(xdr, 8);
5279 if (unlikely(!p))
5280 goto out_overflow;
5281 clp->cl_seqid = be32_to_cpup(p++);
5282 session->flags = be32_to_cpup(p);
5283
5284 /* Channel attributes */
5285 status = decode_chan_attrs(xdr, &session->fc_attrs);
5286 if (!status)
5287 status = decode_chan_attrs(xdr, &session->bc_attrs);
5288 return status;
5289 out_overflow:
5290 print_overflow_msg(__func__, xdr);
5291 return -EIO;
5292 }
5293
5294 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5295 {
5296 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5297 }
5298
5299 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5300 {
5301 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5302 }
5303 #endif /* CONFIG_NFS_V4_1 */
5304
5305 static int decode_sequence(struct xdr_stream *xdr,
5306 struct nfs4_sequence_res *res,
5307 struct rpc_rqst *rqstp)
5308 {
5309 #if defined(CONFIG_NFS_V4_1)
5310 struct nfs4_sessionid id;
5311 u32 dummy;
5312 int status;
5313 __be32 *p;
5314
5315 if (!res->sr_session)
5316 return 0;
5317
5318 status = decode_op_hdr(xdr, OP_SEQUENCE);
5319 if (!status)
5320 status = decode_sessionid(xdr, &id);
5321 if (unlikely(status))
5322 goto out_err;
5323
5324 /*
5325 * If the server returns different values for sessionID, slotID or
5326 * sequence number, the server is looney tunes.
5327 */
5328 status = -EREMOTEIO;
5329
5330 if (memcmp(id.data, res->sr_session->sess_id.data,
5331 NFS4_MAX_SESSIONID_LEN)) {
5332 dprintk("%s Invalid session id\n", __func__);
5333 goto out_err;
5334 }
5335
5336 p = xdr_inline_decode(xdr, 20);
5337 if (unlikely(!p))
5338 goto out_overflow;
5339
5340 /* seqid */
5341 dummy = be32_to_cpup(p++);
5342 if (dummy != res->sr_slot->seq_nr) {
5343 dprintk("%s Invalid sequence number\n", __func__);
5344 goto out_err;
5345 }
5346 /* slot id */
5347 dummy = be32_to_cpup(p++);
5348 if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5349 dprintk("%s Invalid slot id\n", __func__);
5350 goto out_err;
5351 }
5352 /* highest slot id - currently not processed */
5353 dummy = be32_to_cpup(p++);
5354 /* target highest slot id - currently not processed */
5355 dummy = be32_to_cpup(p++);
5356 /* result flags */
5357 res->sr_status_flags = be32_to_cpup(p);
5358 status = 0;
5359 out_err:
5360 res->sr_status = status;
5361 return status;
5362 out_overflow:
5363 print_overflow_msg(__func__, xdr);
5364 status = -EIO;
5365 goto out_err;
5366 #else /* CONFIG_NFS_V4_1 */
5367 return 0;
5368 #endif /* CONFIG_NFS_V4_1 */
5369 }
5370
5371 #if defined(CONFIG_NFS_V4_1)
5372 /*
5373 * TODO: Need to handle case when EOF != true;
5374 */
5375 static int decode_getdevicelist(struct xdr_stream *xdr,
5376 struct pnfs_devicelist *res)
5377 {
5378 __be32 *p;
5379 int status, i;
5380 struct nfs_writeverf verftemp;
5381
5382 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5383 if (status)
5384 return status;
5385
5386 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5387 if (unlikely(!p))
5388 goto out_overflow;
5389
5390 /* TODO: Skip cookie for now */
5391 p += 2;
5392
5393 /* Read verifier */
5394 p = xdr_decode_opaque_fixed(p, verftemp.verifier, NFS4_VERIFIER_SIZE);
5395
5396 res->num_devs = be32_to_cpup(p);
5397
5398 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5399
5400 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5401 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5402 __func__, res->num_devs);
5403 return -EIO;
5404 }
5405
5406 p = xdr_inline_decode(xdr,
5407 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5408 if (unlikely(!p))
5409 goto out_overflow;
5410 for (i = 0; i < res->num_devs; i++)
5411 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5412 NFS4_DEVICEID4_SIZE);
5413 res->eof = be32_to_cpup(p);
5414 return 0;
5415 out_overflow:
5416 print_overflow_msg(__func__, xdr);
5417 return -EIO;
5418 }
5419
5420 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5421 struct pnfs_device *pdev)
5422 {
5423 __be32 *p;
5424 uint32_t len, type;
5425 int status;
5426
5427 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5428 if (status) {
5429 if (status == -ETOOSMALL) {
5430 p = xdr_inline_decode(xdr, 4);
5431 if (unlikely(!p))
5432 goto out_overflow;
5433 pdev->mincount = be32_to_cpup(p);
5434 dprintk("%s: Min count too small. mincnt = %u\n",
5435 __func__, pdev->mincount);
5436 }
5437 return status;
5438 }
5439
5440 p = xdr_inline_decode(xdr, 8);
5441 if (unlikely(!p))
5442 goto out_overflow;
5443 type = be32_to_cpup(p++);
5444 if (type != pdev->layout_type) {
5445 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5446 __func__, pdev->layout_type, type);
5447 return -EINVAL;
5448 }
5449 /*
5450 * Get the length of the opaque device_addr4. xdr_read_pages places
5451 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5452 * and places the remaining xdr data in xdr_buf->tail
5453 */
5454 pdev->mincount = be32_to_cpup(p);
5455 xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5456
5457 /* Parse notification bitmap, verifying that it is zero. */
5458 p = xdr_inline_decode(xdr, 4);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 len = be32_to_cpup(p);
5462 if (len) {
5463 uint32_t i;
5464
5465 p = xdr_inline_decode(xdr, 4 * len);
5466 if (unlikely(!p))
5467 goto out_overflow;
5468 for (i = 0; i < len; i++, p++) {
5469 if (be32_to_cpup(p)) {
5470 dprintk("%s: notifications not supported\n",
5471 __func__);
5472 return -EIO;
5473 }
5474 }
5475 }
5476 return 0;
5477 out_overflow:
5478 print_overflow_msg(__func__, xdr);
5479 return -EIO;
5480 }
5481
5482 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5483 struct nfs4_layoutget_res *res)
5484 {
5485 __be32 *p;
5486 int status;
5487 u32 layout_count;
5488 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5489 struct kvec *iov = rcvbuf->head;
5490 u32 hdrlen, recvd;
5491
5492 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5493 if (status)
5494 return status;
5495 p = xdr_inline_decode(xdr, 4);
5496 if (unlikely(!p))
5497 goto out_overflow;
5498 res->return_on_close = be32_to_cpup(p);
5499 decode_stateid(xdr, &res->stateid);
5500 p = xdr_inline_decode(xdr, 4);
5501 if (unlikely(!p))
5502 goto out_overflow;
5503 layout_count = be32_to_cpup(p);
5504 if (!layout_count) {
5505 dprintk("%s: server responded with empty layout array\n",
5506 __func__);
5507 return -EINVAL;
5508 }
5509
5510 p = xdr_inline_decode(xdr, 28);
5511 if (unlikely(!p))
5512 goto out_overflow;
5513 p = xdr_decode_hyper(p, &res->range.offset);
5514 p = xdr_decode_hyper(p, &res->range.length);
5515 res->range.iomode = be32_to_cpup(p++);
5516 res->type = be32_to_cpup(p++);
5517 res->layoutp->len = be32_to_cpup(p);
5518
5519 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5520 __func__,
5521 (unsigned long)res->range.offset,
5522 (unsigned long)res->range.length,
5523 res->range.iomode,
5524 res->type,
5525 res->layoutp->len);
5526
5527 hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5528 recvd = req->rq_rcv_buf.len - hdrlen;
5529 if (res->layoutp->len > recvd) {
5530 dprintk("NFS: server cheating in layoutget reply: "
5531 "layout len %u > recvd %u\n",
5532 res->layoutp->len, recvd);
5533 return -EINVAL;
5534 }
5535
5536 xdr_read_pages(xdr, res->layoutp->len);
5537
5538 if (layout_count > 1) {
5539 /* We only handle a length one array at the moment. Any
5540 * further entries are just ignored. Note that this means
5541 * the client may see a response that is less than the
5542 * minimum it requested.
5543 */
5544 dprintk("%s: server responded with %d layouts, dropping tail\n",
5545 __func__, layout_count);
5546 }
5547
5548 return 0;
5549 out_overflow:
5550 print_overflow_msg(__func__, xdr);
5551 return -EIO;
5552 }
5553
5554 static int decode_layoutreturn(struct xdr_stream *xdr,
5555 struct nfs4_layoutreturn_res *res)
5556 {
5557 __be32 *p;
5558 int status;
5559
5560 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5561 if (status)
5562 return status;
5563 p = xdr_inline_decode(xdr, 4);
5564 if (unlikely(!p))
5565 goto out_overflow;
5566 res->lrs_present = be32_to_cpup(p);
5567 if (res->lrs_present)
5568 status = decode_stateid(xdr, &res->stateid);
5569 return status;
5570 out_overflow:
5571 print_overflow_msg(__func__, xdr);
5572 return -EIO;
5573 }
5574
5575 static int decode_layoutcommit(struct xdr_stream *xdr,
5576 struct rpc_rqst *req,
5577 struct nfs4_layoutcommit_res *res)
5578 {
5579 __be32 *p;
5580 __u32 sizechanged;
5581 int status;
5582
5583 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5584 res->status = status;
5585 if (status)
5586 return status;
5587
5588 p = xdr_inline_decode(xdr, 4);
5589 if (unlikely(!p))
5590 goto out_overflow;
5591 sizechanged = be32_to_cpup(p);
5592
5593 if (sizechanged) {
5594 /* throw away new size */
5595 p = xdr_inline_decode(xdr, 8);
5596 if (unlikely(!p))
5597 goto out_overflow;
5598 }
5599 return 0;
5600 out_overflow:
5601 print_overflow_msg(__func__, xdr);
5602 return -EIO;
5603 }
5604
5605 static int decode_test_stateid(struct xdr_stream *xdr,
5606 struct nfs41_test_stateid_res *res)
5607 {
5608 __be32 *p;
5609 int status;
5610 int num_res;
5611
5612 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5613 if (status)
5614 return status;
5615
5616 p = xdr_inline_decode(xdr, 4);
5617 if (unlikely(!p))
5618 goto out_overflow;
5619 num_res = be32_to_cpup(p++);
5620 if (num_res != 1)
5621 goto out;
5622
5623 p = xdr_inline_decode(xdr, 4);
5624 if (unlikely(!p))
5625 goto out_overflow;
5626 res->status = be32_to_cpup(p++);
5627
5628 return status;
5629 out_overflow:
5630 print_overflow_msg(__func__, xdr);
5631 out:
5632 return -EIO;
5633 }
5634
5635 static int decode_free_stateid(struct xdr_stream *xdr,
5636 struct nfs41_free_stateid_res *res)
5637 {
5638 __be32 *p;
5639 int status;
5640
5641 status = decode_op_hdr(xdr, OP_FREE_STATEID);
5642 if (status)
5643 return status;
5644
5645 p = xdr_inline_decode(xdr, 4);
5646 if (unlikely(!p))
5647 goto out_overflow;
5648 res->status = be32_to_cpup(p++);
5649 return res->status;
5650 out_overflow:
5651 print_overflow_msg(__func__, xdr);
5652 return -EIO;
5653 }
5654 #endif /* CONFIG_NFS_V4_1 */
5655
5656 /*
5657 * END OF "GENERIC" DECODE ROUTINES.
5658 */
5659
5660 /*
5661 * Decode OPEN_DOWNGRADE response
5662 */
5663 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5664 struct xdr_stream *xdr,
5665 struct nfs_closeres *res)
5666 {
5667 struct compound_hdr hdr;
5668 int status;
5669
5670 status = decode_compound_hdr(xdr, &hdr);
5671 if (status)
5672 goto out;
5673 status = decode_sequence(xdr, &res->seq_res, rqstp);
5674 if (status)
5675 goto out;
5676 status = decode_putfh(xdr);
5677 if (status)
5678 goto out;
5679 status = decode_open_downgrade(xdr, res);
5680 if (status != 0)
5681 goto out;
5682 decode_getfattr(xdr, res->fattr, res->server);
5683 out:
5684 return status;
5685 }
5686
5687 /*
5688 * Decode ACCESS response
5689 */
5690 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5691 struct nfs4_accessres *res)
5692 {
5693 struct compound_hdr hdr;
5694 int status;
5695
5696 status = decode_compound_hdr(xdr, &hdr);
5697 if (status)
5698 goto out;
5699 status = decode_sequence(xdr, &res->seq_res, rqstp);
5700 if (status)
5701 goto out;
5702 status = decode_putfh(xdr);
5703 if (status != 0)
5704 goto out;
5705 status = decode_access(xdr, res);
5706 if (status != 0)
5707 goto out;
5708 decode_getfattr(xdr, res->fattr, res->server);
5709 out:
5710 return status;
5711 }
5712
5713 /*
5714 * Decode LOOKUP response
5715 */
5716 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5717 struct nfs4_lookup_res *res)
5718 {
5719 struct compound_hdr hdr;
5720 int status;
5721
5722 status = decode_compound_hdr(xdr, &hdr);
5723 if (status)
5724 goto out;
5725 status = decode_sequence(xdr, &res->seq_res, rqstp);
5726 if (status)
5727 goto out;
5728 status = decode_putfh(xdr);
5729 if (status)
5730 goto out;
5731 status = decode_lookup(xdr);
5732 if (status)
5733 goto out;
5734 status = decode_getfh(xdr, res->fh);
5735 if (status)
5736 goto out;
5737 status = decode_getfattr(xdr, res->fattr, res->server);
5738 out:
5739 return status;
5740 }
5741
5742 /*
5743 * Decode LOOKUP_ROOT response
5744 */
5745 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5746 struct xdr_stream *xdr,
5747 struct nfs4_lookup_res *res)
5748 {
5749 struct compound_hdr hdr;
5750 int status;
5751
5752 status = decode_compound_hdr(xdr, &hdr);
5753 if (status)
5754 goto out;
5755 status = decode_sequence(xdr, &res->seq_res, rqstp);
5756 if (status)
5757 goto out;
5758 status = decode_putrootfh(xdr);
5759 if (status)
5760 goto out;
5761 status = decode_getfh(xdr, res->fh);
5762 if (status == 0)
5763 status = decode_getfattr(xdr, res->fattr, res->server);
5764 out:
5765 return status;
5766 }
5767
5768 /*
5769 * Decode REMOVE response
5770 */
5771 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5772 struct nfs_removeres *res)
5773 {
5774 struct compound_hdr hdr;
5775 int status;
5776
5777 status = decode_compound_hdr(xdr, &hdr);
5778 if (status)
5779 goto out;
5780 status = decode_sequence(xdr, &res->seq_res, rqstp);
5781 if (status)
5782 goto out;
5783 status = decode_putfh(xdr);
5784 if (status)
5785 goto out;
5786 status = decode_remove(xdr, &res->cinfo);
5787 if (status)
5788 goto out;
5789 decode_getfattr(xdr, res->dir_attr, res->server);
5790 out:
5791 return status;
5792 }
5793
5794 /*
5795 * Decode RENAME response
5796 */
5797 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5798 struct nfs_renameres *res)
5799 {
5800 struct compound_hdr hdr;
5801 int status;
5802
5803 status = decode_compound_hdr(xdr, &hdr);
5804 if (status)
5805 goto out;
5806 status = decode_sequence(xdr, &res->seq_res, rqstp);
5807 if (status)
5808 goto out;
5809 status = decode_putfh(xdr);
5810 if (status)
5811 goto out;
5812 status = decode_savefh(xdr);
5813 if (status)
5814 goto out;
5815 status = decode_putfh(xdr);
5816 if (status)
5817 goto out;
5818 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5819 if (status)
5820 goto out;
5821 /* Current FH is target directory */
5822 if (decode_getfattr(xdr, res->new_fattr, res->server))
5823 goto out;
5824 status = decode_restorefh(xdr);
5825 if (status)
5826 goto out;
5827 decode_getfattr(xdr, res->old_fattr, res->server);
5828 out:
5829 return status;
5830 }
5831
5832 /*
5833 * Decode LINK response
5834 */
5835 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5836 struct nfs4_link_res *res)
5837 {
5838 struct compound_hdr hdr;
5839 int status;
5840
5841 status = decode_compound_hdr(xdr, &hdr);
5842 if (status)
5843 goto out;
5844 status = decode_sequence(xdr, &res->seq_res, rqstp);
5845 if (status)
5846 goto out;
5847 status = decode_putfh(xdr);
5848 if (status)
5849 goto out;
5850 status = decode_savefh(xdr);
5851 if (status)
5852 goto out;
5853 status = decode_putfh(xdr);
5854 if (status)
5855 goto out;
5856 status = decode_link(xdr, &res->cinfo);
5857 if (status)
5858 goto out;
5859 /*
5860 * Note order: OP_LINK leaves the directory as the current
5861 * filehandle.
5862 */
5863 if (decode_getfattr(xdr, res->dir_attr, res->server))
5864 goto out;
5865 status = decode_restorefh(xdr);
5866 if (status)
5867 goto out;
5868 decode_getfattr(xdr, res->fattr, res->server);
5869 out:
5870 return status;
5871 }
5872
5873 /*
5874 * Decode CREATE response
5875 */
5876 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5877 struct nfs4_create_res *res)
5878 {
5879 struct compound_hdr hdr;
5880 int status;
5881
5882 status = decode_compound_hdr(xdr, &hdr);
5883 if (status)
5884 goto out;
5885 status = decode_sequence(xdr, &res->seq_res, rqstp);
5886 if (status)
5887 goto out;
5888 status = decode_putfh(xdr);
5889 if (status)
5890 goto out;
5891 status = decode_savefh(xdr);
5892 if (status)
5893 goto out;
5894 status = decode_create(xdr, &res->dir_cinfo);
5895 if (status)
5896 goto out;
5897 status = decode_getfh(xdr, res->fh);
5898 if (status)
5899 goto out;
5900 if (decode_getfattr(xdr, res->fattr, res->server))
5901 goto out;
5902 status = decode_restorefh(xdr);
5903 if (status)
5904 goto out;
5905 decode_getfattr(xdr, res->dir_fattr, res->server);
5906 out:
5907 return status;
5908 }
5909
5910 /*
5911 * Decode SYMLINK response
5912 */
5913 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5914 struct nfs4_create_res *res)
5915 {
5916 return nfs4_xdr_dec_create(rqstp, xdr, res);
5917 }
5918
5919 /*
5920 * Decode GETATTR response
5921 */
5922 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5923 struct nfs4_getattr_res *res)
5924 {
5925 struct compound_hdr hdr;
5926 int status;
5927
5928 status = decode_compound_hdr(xdr, &hdr);
5929 if (status)
5930 goto out;
5931 status = decode_sequence(xdr, &res->seq_res, rqstp);
5932 if (status)
5933 goto out;
5934 status = decode_putfh(xdr);
5935 if (status)
5936 goto out;
5937 status = decode_getfattr(xdr, res->fattr, res->server);
5938 out:
5939 return status;
5940 }
5941
5942 /*
5943 * Encode an SETACL request
5944 */
5945 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5946 struct nfs_setaclargs *args)
5947 {
5948 struct compound_hdr hdr = {
5949 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5950 };
5951
5952 encode_compound_hdr(xdr, req, &hdr);
5953 encode_sequence(xdr, &args->seq_args, &hdr);
5954 encode_putfh(xdr, args->fh, &hdr);
5955 encode_setacl(xdr, args, &hdr);
5956 encode_nops(&hdr);
5957 }
5958
5959 /*
5960 * Decode SETACL response
5961 */
5962 static int
5963 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5964 struct nfs_setaclres *res)
5965 {
5966 struct compound_hdr hdr;
5967 int status;
5968
5969 status = decode_compound_hdr(xdr, &hdr);
5970 if (status)
5971 goto out;
5972 status = decode_sequence(xdr, &res->seq_res, rqstp);
5973 if (status)
5974 goto out;
5975 status = decode_putfh(xdr);
5976 if (status)
5977 goto out;
5978 status = decode_setattr(xdr);
5979 out:
5980 return status;
5981 }
5982
5983 /*
5984 * Decode GETACL response
5985 */
5986 static int
5987 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5988 struct nfs_getaclres *res)
5989 {
5990 struct compound_hdr hdr;
5991 int status;
5992
5993 if (res->acl_scratch != NULL) {
5994 void *p = page_address(res->acl_scratch);
5995 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
5996 }
5997 status = decode_compound_hdr(xdr, &hdr);
5998 if (status)
5999 goto out;
6000 status = decode_sequence(xdr, &res->seq_res, rqstp);
6001 if (status)
6002 goto out;
6003 status = decode_putfh(xdr);
6004 if (status)
6005 goto out;
6006 status = decode_getacl(xdr, rqstp, res);
6007
6008 out:
6009 return status;
6010 }
6011
6012 /*
6013 * Decode CLOSE response
6014 */
6015 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016 struct nfs_closeres *res)
6017 {
6018 struct compound_hdr hdr;
6019 int status;
6020
6021 status = decode_compound_hdr(xdr, &hdr);
6022 if (status)
6023 goto out;
6024 status = decode_sequence(xdr, &res->seq_res, rqstp);
6025 if (status)
6026 goto out;
6027 status = decode_putfh(xdr);
6028 if (status)
6029 goto out;
6030 status = decode_close(xdr, res);
6031 if (status != 0)
6032 goto out;
6033 /*
6034 * Note: Server may do delete on close for this file
6035 * in which case the getattr call will fail with
6036 * an ESTALE error. Shouldn't be a problem,
6037 * though, since fattr->valid will remain unset.
6038 */
6039 decode_getfattr(xdr, res->fattr, res->server);
6040 out:
6041 return status;
6042 }
6043
6044 /*
6045 * Decode OPEN response
6046 */
6047 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6048 struct nfs_openres *res)
6049 {
6050 struct compound_hdr hdr;
6051 int status;
6052
6053 status = decode_compound_hdr(xdr, &hdr);
6054 if (status)
6055 goto out;
6056 status = decode_sequence(xdr, &res->seq_res, rqstp);
6057 if (status)
6058 goto out;
6059 status = decode_putfh(xdr);
6060 if (status)
6061 goto out;
6062 status = decode_savefh(xdr);
6063 if (status)
6064 goto out;
6065 status = decode_open(xdr, res);
6066 if (status)
6067 goto out;
6068 if (decode_getfh(xdr, &res->fh) != 0)
6069 goto out;
6070 if (decode_getfattr(xdr, res->f_attr, res->server) != 0)
6071 goto out;
6072 if (decode_restorefh(xdr) != 0)
6073 goto out;
6074 decode_getfattr(xdr, res->dir_attr, res->server);
6075 out:
6076 return status;
6077 }
6078
6079 /*
6080 * Decode OPEN_CONFIRM response
6081 */
6082 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6083 struct xdr_stream *xdr,
6084 struct nfs_open_confirmres *res)
6085 {
6086 struct compound_hdr hdr;
6087 int status;
6088
6089 status = decode_compound_hdr(xdr, &hdr);
6090 if (status)
6091 goto out;
6092 status = decode_putfh(xdr);
6093 if (status)
6094 goto out;
6095 status = decode_open_confirm(xdr, res);
6096 out:
6097 return status;
6098 }
6099
6100 /*
6101 * Decode OPEN response
6102 */
6103 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6104 struct xdr_stream *xdr,
6105 struct nfs_openres *res)
6106 {
6107 struct compound_hdr hdr;
6108 int status;
6109
6110 status = decode_compound_hdr(xdr, &hdr);
6111 if (status)
6112 goto out;
6113 status = decode_sequence(xdr, &res->seq_res, rqstp);
6114 if (status)
6115 goto out;
6116 status = decode_putfh(xdr);
6117 if (status)
6118 goto out;
6119 status = decode_open(xdr, res);
6120 if (status)
6121 goto out;
6122 decode_getfattr(xdr, res->f_attr, res->server);
6123 out:
6124 return status;
6125 }
6126
6127 /*
6128 * Decode SETATTR response
6129 */
6130 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6131 struct xdr_stream *xdr,
6132 struct nfs_setattrres *res)
6133 {
6134 struct compound_hdr hdr;
6135 int status;
6136
6137 status = decode_compound_hdr(xdr, &hdr);
6138 if (status)
6139 goto out;
6140 status = decode_sequence(xdr, &res->seq_res, rqstp);
6141 if (status)
6142 goto out;
6143 status = decode_putfh(xdr);
6144 if (status)
6145 goto out;
6146 status = decode_setattr(xdr);
6147 if (status)
6148 goto out;
6149 decode_getfattr(xdr, res->fattr, res->server);
6150 out:
6151 return status;
6152 }
6153
6154 /*
6155 * Decode LOCK response
6156 */
6157 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6158 struct nfs_lock_res *res)
6159 {
6160 struct compound_hdr hdr;
6161 int status;
6162
6163 status = decode_compound_hdr(xdr, &hdr);
6164 if (status)
6165 goto out;
6166 status = decode_sequence(xdr, &res->seq_res, rqstp);
6167 if (status)
6168 goto out;
6169 status = decode_putfh(xdr);
6170 if (status)
6171 goto out;
6172 status = decode_lock(xdr, res);
6173 out:
6174 return status;
6175 }
6176
6177 /*
6178 * Decode LOCKT response
6179 */
6180 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6181 struct nfs_lockt_res *res)
6182 {
6183 struct compound_hdr hdr;
6184 int status;
6185
6186 status = decode_compound_hdr(xdr, &hdr);
6187 if (status)
6188 goto out;
6189 status = decode_sequence(xdr, &res->seq_res, rqstp);
6190 if (status)
6191 goto out;
6192 status = decode_putfh(xdr);
6193 if (status)
6194 goto out;
6195 status = decode_lockt(xdr, res);
6196 out:
6197 return status;
6198 }
6199
6200 /*
6201 * Decode LOCKU response
6202 */
6203 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6204 struct nfs_locku_res *res)
6205 {
6206 struct compound_hdr hdr;
6207 int status;
6208
6209 status = decode_compound_hdr(xdr, &hdr);
6210 if (status)
6211 goto out;
6212 status = decode_sequence(xdr, &res->seq_res, rqstp);
6213 if (status)
6214 goto out;
6215 status = decode_putfh(xdr);
6216 if (status)
6217 goto out;
6218 status = decode_locku(xdr, res);
6219 out:
6220 return status;
6221 }
6222
6223 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6224 struct xdr_stream *xdr, void *dummy)
6225 {
6226 struct compound_hdr hdr;
6227 int status;
6228
6229 status = decode_compound_hdr(xdr, &hdr);
6230 if (!status)
6231 status = decode_release_lockowner(xdr);
6232 return status;
6233 }
6234
6235 /*
6236 * Decode READLINK response
6237 */
6238 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6239 struct xdr_stream *xdr,
6240 struct nfs4_readlink_res *res)
6241 {
6242 struct compound_hdr hdr;
6243 int status;
6244
6245 status = decode_compound_hdr(xdr, &hdr);
6246 if (status)
6247 goto out;
6248 status = decode_sequence(xdr, &res->seq_res, rqstp);
6249 if (status)
6250 goto out;
6251 status = decode_putfh(xdr);
6252 if (status)
6253 goto out;
6254 status = decode_readlink(xdr, rqstp);
6255 out:
6256 return status;
6257 }
6258
6259 /*
6260 * Decode READDIR response
6261 */
6262 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6263 struct nfs4_readdir_res *res)
6264 {
6265 struct compound_hdr hdr;
6266 int status;
6267
6268 status = decode_compound_hdr(xdr, &hdr);
6269 if (status)
6270 goto out;
6271 status = decode_sequence(xdr, &res->seq_res, rqstp);
6272 if (status)
6273 goto out;
6274 status = decode_putfh(xdr);
6275 if (status)
6276 goto out;
6277 status = decode_readdir(xdr, rqstp, res);
6278 out:
6279 return status;
6280 }
6281
6282 /*
6283 * Decode Read response
6284 */
6285 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6286 struct nfs_readres *res)
6287 {
6288 struct compound_hdr hdr;
6289 int status;
6290
6291 status = decode_compound_hdr(xdr, &hdr);
6292 if (status)
6293 goto out;
6294 status = decode_sequence(xdr, &res->seq_res, rqstp);
6295 if (status)
6296 goto out;
6297 status = decode_putfh(xdr);
6298 if (status)
6299 goto out;
6300 status = decode_read(xdr, rqstp, res);
6301 if (!status)
6302 status = res->count;
6303 out:
6304 return status;
6305 }
6306
6307 /*
6308 * Decode WRITE response
6309 */
6310 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6311 struct nfs_writeres *res)
6312 {
6313 struct compound_hdr hdr;
6314 int status;
6315
6316 status = decode_compound_hdr(xdr, &hdr);
6317 if (status)
6318 goto out;
6319 status = decode_sequence(xdr, &res->seq_res, rqstp);
6320 if (status)
6321 goto out;
6322 status = decode_putfh(xdr);
6323 if (status)
6324 goto out;
6325 status = decode_write(xdr, res);
6326 if (status)
6327 goto out;
6328 if (res->fattr)
6329 decode_getfattr(xdr, res->fattr, res->server);
6330 if (!status)
6331 status = res->count;
6332 out:
6333 return status;
6334 }
6335
6336 /*
6337 * Decode COMMIT response
6338 */
6339 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6340 struct nfs_writeres *res)
6341 {
6342 struct compound_hdr hdr;
6343 int status;
6344
6345 status = decode_compound_hdr(xdr, &hdr);
6346 if (status)
6347 goto out;
6348 status = decode_sequence(xdr, &res->seq_res, rqstp);
6349 if (status)
6350 goto out;
6351 status = decode_putfh(xdr);
6352 if (status)
6353 goto out;
6354 status = decode_commit(xdr, res);
6355 if (status)
6356 goto out;
6357 if (res->fattr)
6358 decode_getfattr(xdr, res->fattr, res->server);
6359 out:
6360 return status;
6361 }
6362
6363 /*
6364 * Decode FSINFO response
6365 */
6366 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6367 struct nfs4_fsinfo_res *res)
6368 {
6369 struct compound_hdr hdr;
6370 int status;
6371
6372 status = decode_compound_hdr(xdr, &hdr);
6373 if (!status)
6374 status = decode_sequence(xdr, &res->seq_res, req);
6375 if (!status)
6376 status = decode_putfh(xdr);
6377 if (!status)
6378 status = decode_fsinfo(xdr, res->fsinfo);
6379 return status;
6380 }
6381
6382 /*
6383 * Decode PATHCONF response
6384 */
6385 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6386 struct nfs4_pathconf_res *res)
6387 {
6388 struct compound_hdr hdr;
6389 int status;
6390
6391 status = decode_compound_hdr(xdr, &hdr);
6392 if (!status)
6393 status = decode_sequence(xdr, &res->seq_res, req);
6394 if (!status)
6395 status = decode_putfh(xdr);
6396 if (!status)
6397 status = decode_pathconf(xdr, res->pathconf);
6398 return status;
6399 }
6400
6401 /*
6402 * Decode STATFS response
6403 */
6404 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6405 struct nfs4_statfs_res *res)
6406 {
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 status = decode_compound_hdr(xdr, &hdr);
6411 if (!status)
6412 status = decode_sequence(xdr, &res->seq_res, req);
6413 if (!status)
6414 status = decode_putfh(xdr);
6415 if (!status)
6416 status = decode_statfs(xdr, res->fsstat);
6417 return status;
6418 }
6419
6420 /*
6421 * Decode GETATTR_BITMAP response
6422 */
6423 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6424 struct xdr_stream *xdr,
6425 struct nfs4_server_caps_res *res)
6426 {
6427 struct compound_hdr hdr;
6428 int status;
6429
6430 status = decode_compound_hdr(xdr, &hdr);
6431 if (status)
6432 goto out;
6433 status = decode_sequence(xdr, &res->seq_res, req);
6434 if (status)
6435 goto out;
6436 status = decode_putfh(xdr);
6437 if (status)
6438 goto out;
6439 status = decode_server_caps(xdr, res);
6440 out:
6441 return status;
6442 }
6443
6444 /*
6445 * Decode RENEW response
6446 */
6447 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6448 void *__unused)
6449 {
6450 struct compound_hdr hdr;
6451 int status;
6452
6453 status = decode_compound_hdr(xdr, &hdr);
6454 if (!status)
6455 status = decode_renew(xdr);
6456 return status;
6457 }
6458
6459 /*
6460 * Decode SETCLIENTID response
6461 */
6462 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6463 struct xdr_stream *xdr,
6464 struct nfs4_setclientid_res *res)
6465 {
6466 struct compound_hdr hdr;
6467 int status;
6468
6469 status = decode_compound_hdr(xdr, &hdr);
6470 if (!status)
6471 status = decode_setclientid(xdr, res);
6472 return status;
6473 }
6474
6475 /*
6476 * Decode SETCLIENTID_CONFIRM response
6477 */
6478 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6479 struct xdr_stream *xdr,
6480 struct nfs_fsinfo *fsinfo)
6481 {
6482 struct compound_hdr hdr;
6483 int status;
6484
6485 status = decode_compound_hdr(xdr, &hdr);
6486 if (!status)
6487 status = decode_setclientid_confirm(xdr);
6488 if (!status)
6489 status = decode_putrootfh(xdr);
6490 if (!status)
6491 status = decode_fsinfo(xdr, fsinfo);
6492 return status;
6493 }
6494
6495 /*
6496 * Decode DELEGRETURN response
6497 */
6498 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6499 struct xdr_stream *xdr,
6500 struct nfs4_delegreturnres *res)
6501 {
6502 struct compound_hdr hdr;
6503 int status;
6504
6505 status = decode_compound_hdr(xdr, &hdr);
6506 if (status)
6507 goto out;
6508 status = decode_sequence(xdr, &res->seq_res, rqstp);
6509 if (status)
6510 goto out;
6511 status = decode_putfh(xdr);
6512 if (status != 0)
6513 goto out;
6514 status = decode_delegreturn(xdr);
6515 if (status != 0)
6516 goto out;
6517 decode_getfattr(xdr, res->fattr, res->server);
6518 out:
6519 return status;
6520 }
6521
6522 /*
6523 * Decode FS_LOCATIONS response
6524 */
6525 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6526 struct xdr_stream *xdr,
6527 struct nfs4_fs_locations_res *res)
6528 {
6529 struct compound_hdr hdr;
6530 int status;
6531
6532 status = decode_compound_hdr(xdr, &hdr);
6533 if (status)
6534 goto out;
6535 status = decode_sequence(xdr, &res->seq_res, req);
6536 if (status)
6537 goto out;
6538 status = decode_putfh(xdr);
6539 if (status)
6540 goto out;
6541 status = decode_lookup(xdr);
6542 if (status)
6543 goto out;
6544 xdr_enter_page(xdr, PAGE_SIZE);
6545 status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6546 NULL, res->fs_locations,
6547 res->fs_locations->server);
6548 out:
6549 return status;
6550 }
6551
6552 /*
6553 * Decode SECINFO response
6554 */
6555 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6556 struct xdr_stream *xdr,
6557 struct nfs4_secinfo_res *res)
6558 {
6559 struct compound_hdr hdr;
6560 int status;
6561
6562 status = decode_compound_hdr(xdr, &hdr);
6563 if (status)
6564 goto out;
6565 status = decode_sequence(xdr, &res->seq_res, rqstp);
6566 if (status)
6567 goto out;
6568 status = decode_putfh(xdr);
6569 if (status)
6570 goto out;
6571 status = decode_secinfo(xdr, res);
6572 out:
6573 return status;
6574 }
6575
6576 #if defined(CONFIG_NFS_V4_1)
6577 /*
6578 * Decode EXCHANGE_ID response
6579 */
6580 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6581 struct xdr_stream *xdr,
6582 void *res)
6583 {
6584 struct compound_hdr hdr;
6585 int status;
6586
6587 status = decode_compound_hdr(xdr, &hdr);
6588 if (!status)
6589 status = decode_exchange_id(xdr, res);
6590 return status;
6591 }
6592
6593 /*
6594 * Decode CREATE_SESSION response
6595 */
6596 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6597 struct xdr_stream *xdr,
6598 struct nfs41_create_session_res *res)
6599 {
6600 struct compound_hdr hdr;
6601 int status;
6602
6603 status = decode_compound_hdr(xdr, &hdr);
6604 if (!status)
6605 status = decode_create_session(xdr, res);
6606 return status;
6607 }
6608
6609 /*
6610 * Decode DESTROY_SESSION response
6611 */
6612 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6613 struct xdr_stream *xdr,
6614 void *res)
6615 {
6616 struct compound_hdr hdr;
6617 int status;
6618
6619 status = decode_compound_hdr(xdr, &hdr);
6620 if (!status)
6621 status = decode_destroy_session(xdr, res);
6622 return status;
6623 }
6624
6625 /*
6626 * Decode SEQUENCE response
6627 */
6628 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6629 struct xdr_stream *xdr,
6630 struct nfs4_sequence_res *res)
6631 {
6632 struct compound_hdr hdr;
6633 int status;
6634
6635 status = decode_compound_hdr(xdr, &hdr);
6636 if (!status)
6637 status = decode_sequence(xdr, res, rqstp);
6638 return status;
6639 }
6640
6641 /*
6642 * Decode GET_LEASE_TIME response
6643 */
6644 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6645 struct xdr_stream *xdr,
6646 struct nfs4_get_lease_time_res *res)
6647 {
6648 struct compound_hdr hdr;
6649 int status;
6650
6651 status = decode_compound_hdr(xdr, &hdr);
6652 if (!status)
6653 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6654 if (!status)
6655 status = decode_putrootfh(xdr);
6656 if (!status)
6657 status = decode_fsinfo(xdr, res->lr_fsinfo);
6658 return status;
6659 }
6660
6661 /*
6662 * Decode RECLAIM_COMPLETE response
6663 */
6664 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6665 struct xdr_stream *xdr,
6666 struct nfs41_reclaim_complete_res *res)
6667 {
6668 struct compound_hdr hdr;
6669 int status;
6670
6671 status = decode_compound_hdr(xdr, &hdr);
6672 if (!status)
6673 status = decode_sequence(xdr, &res->seq_res, rqstp);
6674 if (!status)
6675 status = decode_reclaim_complete(xdr, (void *)NULL);
6676 return status;
6677 }
6678
6679 /*
6680 * Decode GETDEVICELIST response
6681 */
6682 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6683 struct xdr_stream *xdr,
6684 struct nfs4_getdevicelist_res *res)
6685 {
6686 struct compound_hdr hdr;
6687 int status;
6688
6689 dprintk("encoding getdevicelist!\n");
6690
6691 status = decode_compound_hdr(xdr, &hdr);
6692 if (status != 0)
6693 goto out;
6694 status = decode_sequence(xdr, &res->seq_res, rqstp);
6695 if (status != 0)
6696 goto out;
6697 status = decode_putfh(xdr);
6698 if (status != 0)
6699 goto out;
6700 status = decode_getdevicelist(xdr, res->devlist);
6701 out:
6702 return status;
6703 }
6704
6705 /*
6706 * Decode GETDEVINFO response
6707 */
6708 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6709 struct xdr_stream *xdr,
6710 struct nfs4_getdeviceinfo_res *res)
6711 {
6712 struct compound_hdr hdr;
6713 int status;
6714
6715 status = decode_compound_hdr(xdr, &hdr);
6716 if (status != 0)
6717 goto out;
6718 status = decode_sequence(xdr, &res->seq_res, rqstp);
6719 if (status != 0)
6720 goto out;
6721 status = decode_getdeviceinfo(xdr, res->pdev);
6722 out:
6723 return status;
6724 }
6725
6726 /*
6727 * Decode LAYOUTGET response
6728 */
6729 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6730 struct xdr_stream *xdr,
6731 struct nfs4_layoutget_res *res)
6732 {
6733 struct compound_hdr hdr;
6734 int status;
6735
6736 status = decode_compound_hdr(xdr, &hdr);
6737 if (status)
6738 goto out;
6739 status = decode_sequence(xdr, &res->seq_res, rqstp);
6740 if (status)
6741 goto out;
6742 status = decode_putfh(xdr);
6743 if (status)
6744 goto out;
6745 status = decode_layoutget(xdr, rqstp, res);
6746 out:
6747 return status;
6748 }
6749
6750 /*
6751 * Decode LAYOUTRETURN response
6752 */
6753 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6754 struct xdr_stream *xdr,
6755 struct nfs4_layoutreturn_res *res)
6756 {
6757 struct compound_hdr hdr;
6758 int status;
6759
6760 status = decode_compound_hdr(xdr, &hdr);
6761 if (status)
6762 goto out;
6763 status = decode_sequence(xdr, &res->seq_res, rqstp);
6764 if (status)
6765 goto out;
6766 status = decode_putfh(xdr);
6767 if (status)
6768 goto out;
6769 status = decode_layoutreturn(xdr, res);
6770 out:
6771 return status;
6772 }
6773
6774 /*
6775 * Decode LAYOUTCOMMIT response
6776 */
6777 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6778 struct xdr_stream *xdr,
6779 struct nfs4_layoutcommit_res *res)
6780 {
6781 struct compound_hdr hdr;
6782 int status;
6783
6784 status = decode_compound_hdr(xdr, &hdr);
6785 if (status)
6786 goto out;
6787 status = decode_sequence(xdr, &res->seq_res, rqstp);
6788 if (status)
6789 goto out;
6790 status = decode_putfh(xdr);
6791 if (status)
6792 goto out;
6793 status = decode_layoutcommit(xdr, rqstp, res);
6794 if (status)
6795 goto out;
6796 decode_getfattr(xdr, res->fattr, res->server);
6797 out:
6798 return status;
6799 }
6800
6801 /*
6802 * Decode SECINFO_NO_NAME response
6803 */
6804 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6805 struct xdr_stream *xdr,
6806 struct nfs4_secinfo_res *res)
6807 {
6808 struct compound_hdr hdr;
6809 int status;
6810
6811 status = decode_compound_hdr(xdr, &hdr);
6812 if (status)
6813 goto out;
6814 status = decode_sequence(xdr, &res->seq_res, rqstp);
6815 if (status)
6816 goto out;
6817 status = decode_putrootfh(xdr);
6818 if (status)
6819 goto out;
6820 status = decode_secinfo(xdr, res);
6821 out:
6822 return status;
6823 }
6824
6825 /*
6826 * Decode TEST_STATEID response
6827 */
6828 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
6829 struct xdr_stream *xdr,
6830 struct nfs41_test_stateid_res *res)
6831 {
6832 struct compound_hdr hdr;
6833 int status;
6834
6835 status = decode_compound_hdr(xdr, &hdr);
6836 if (status)
6837 goto out;
6838 status = decode_sequence(xdr, &res->seq_res, rqstp);
6839 if (status)
6840 goto out;
6841 status = decode_test_stateid(xdr, res);
6842 out:
6843 return status;
6844 }
6845
6846 /*
6847 * Decode FREE_STATEID response
6848 */
6849 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
6850 struct xdr_stream *xdr,
6851 struct nfs41_free_stateid_res *res)
6852 {
6853 struct compound_hdr hdr;
6854 int status;
6855
6856 status = decode_compound_hdr(xdr, &hdr);
6857 if (status)
6858 goto out;
6859 status = decode_sequence(xdr, &res->seq_res, rqstp);
6860 if (status)
6861 goto out;
6862 status = decode_free_stateid(xdr, res);
6863 out:
6864 return status;
6865 }
6866 #endif /* CONFIG_NFS_V4_1 */
6867
6868 /**
6869 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6870 * the local page cache.
6871 * @xdr: XDR stream where entry resides
6872 * @entry: buffer to fill in with entry data
6873 * @plus: boolean indicating whether this should be a readdirplus entry
6874 *
6875 * Returns zero if successful, otherwise a negative errno value is
6876 * returned.
6877 *
6878 * This function is not invoked during READDIR reply decoding, but
6879 * rather whenever an application invokes the getdents(2) system call
6880 * on a directory already in our cache.
6881 */
6882 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6883 int plus)
6884 {
6885 uint32_t bitmap[3] = {0};
6886 uint32_t len;
6887 __be32 *p = xdr_inline_decode(xdr, 4);
6888 if (unlikely(!p))
6889 goto out_overflow;
6890 if (*p == xdr_zero) {
6891 p = xdr_inline_decode(xdr, 4);
6892 if (unlikely(!p))
6893 goto out_overflow;
6894 if (*p == xdr_zero)
6895 return -EAGAIN;
6896 entry->eof = 1;
6897 return -EBADCOOKIE;
6898 }
6899
6900 p = xdr_inline_decode(xdr, 12);
6901 if (unlikely(!p))
6902 goto out_overflow;
6903 entry->prev_cookie = entry->cookie;
6904 p = xdr_decode_hyper(p, &entry->cookie);
6905 entry->len = be32_to_cpup(p);
6906
6907 p = xdr_inline_decode(xdr, entry->len);
6908 if (unlikely(!p))
6909 goto out_overflow;
6910 entry->name = (const char *) p;
6911
6912 /*
6913 * In case the server doesn't return an inode number,
6914 * we fake one here. (We don't use inode number 0,
6915 * since glibc seems to choke on it...)
6916 */
6917 entry->ino = 1;
6918 entry->fattr->valid = 0;
6919
6920 if (decode_attr_bitmap(xdr, bitmap) < 0)
6921 goto out_overflow;
6922
6923 if (decode_attr_length(xdr, &len, &p) < 0)
6924 goto out_overflow;
6925
6926 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6927 NULL, entry->server) < 0)
6928 goto out_overflow;
6929 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
6930 entry->ino = entry->fattr->mounted_on_fileid;
6931 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6932 entry->ino = entry->fattr->fileid;
6933
6934 entry->d_type = DT_UNKNOWN;
6935 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6936 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6937
6938 return 0;
6939
6940 out_overflow:
6941 print_overflow_msg(__func__, xdr);
6942 return -EAGAIN;
6943 }
6944
6945 /*
6946 * We need to translate between nfs status return values and
6947 * the local errno values which may not be the same.
6948 */
6949 static struct {
6950 int stat;
6951 int errno;
6952 } nfs_errtbl[] = {
6953 { NFS4_OK, 0 },
6954 { NFS4ERR_PERM, -EPERM },
6955 { NFS4ERR_NOENT, -ENOENT },
6956 { NFS4ERR_IO, -errno_NFSERR_IO},
6957 { NFS4ERR_NXIO, -ENXIO },
6958 { NFS4ERR_ACCESS, -EACCES },
6959 { NFS4ERR_EXIST, -EEXIST },
6960 { NFS4ERR_XDEV, -EXDEV },
6961 { NFS4ERR_NOTDIR, -ENOTDIR },
6962 { NFS4ERR_ISDIR, -EISDIR },
6963 { NFS4ERR_INVAL, -EINVAL },
6964 { NFS4ERR_FBIG, -EFBIG },
6965 { NFS4ERR_NOSPC, -ENOSPC },
6966 { NFS4ERR_ROFS, -EROFS },
6967 { NFS4ERR_MLINK, -EMLINK },
6968 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
6969 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
6970 { NFS4ERR_DQUOT, -EDQUOT },
6971 { NFS4ERR_STALE, -ESTALE },
6972 { NFS4ERR_BADHANDLE, -EBADHANDLE },
6973 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
6974 { NFS4ERR_NOTSUPP, -ENOTSUPP },
6975 { NFS4ERR_TOOSMALL, -ETOOSMALL },
6976 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
6977 { NFS4ERR_BADTYPE, -EBADTYPE },
6978 { NFS4ERR_LOCKED, -EAGAIN },
6979 { NFS4ERR_SYMLINK, -ELOOP },
6980 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
6981 { NFS4ERR_DEADLOCK, -EDEADLK },
6982 { -1, -EIO }
6983 };
6984
6985 /*
6986 * Convert an NFS error code to a local one.
6987 * This one is used jointly by NFSv2 and NFSv3.
6988 */
6989 static int
6990 nfs4_stat_to_errno(int stat)
6991 {
6992 int i;
6993 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6994 if (nfs_errtbl[i].stat == stat)
6995 return nfs_errtbl[i].errno;
6996 }
6997 if (stat <= 10000 || stat > 10100) {
6998 /* The server is looney tunes. */
6999 return -EREMOTEIO;
7000 }
7001 /* If we cannot translate the error, the recovery routines should
7002 * handle it.
7003 * Note: remaining NFSv4 error codes have values > 10000, so should
7004 * not conflict with native Linux error codes.
7005 */
7006 return -stat;
7007 }
7008
7009 #define PROC(proc, argtype, restype) \
7010 [NFSPROC4_CLNT_##proc] = { \
7011 .p_proc = NFSPROC4_COMPOUND, \
7012 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7013 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7014 .p_arglen = NFS4_##argtype##_sz, \
7015 .p_replen = NFS4_##restype##_sz, \
7016 .p_statidx = NFSPROC4_CLNT_##proc, \
7017 .p_name = #proc, \
7018 }
7019
7020 struct rpc_procinfo nfs4_procedures[] = {
7021 PROC(READ, enc_read, dec_read),
7022 PROC(WRITE, enc_write, dec_write),
7023 PROC(COMMIT, enc_commit, dec_commit),
7024 PROC(OPEN, enc_open, dec_open),
7025 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7026 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7027 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7028 PROC(CLOSE, enc_close, dec_close),
7029 PROC(SETATTR, enc_setattr, dec_setattr),
7030 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7031 PROC(RENEW, enc_renew, dec_renew),
7032 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7033 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7034 PROC(LOCK, enc_lock, dec_lock),
7035 PROC(LOCKT, enc_lockt, dec_lockt),
7036 PROC(LOCKU, enc_locku, dec_locku),
7037 PROC(ACCESS, enc_access, dec_access),
7038 PROC(GETATTR, enc_getattr, dec_getattr),
7039 PROC(LOOKUP, enc_lookup, dec_lookup),
7040 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7041 PROC(REMOVE, enc_remove, dec_remove),
7042 PROC(RENAME, enc_rename, dec_rename),
7043 PROC(LINK, enc_link, dec_link),
7044 PROC(SYMLINK, enc_symlink, dec_symlink),
7045 PROC(CREATE, enc_create, dec_create),
7046 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7047 PROC(STATFS, enc_statfs, dec_statfs),
7048 PROC(READLINK, enc_readlink, dec_readlink),
7049 PROC(READDIR, enc_readdir, dec_readdir),
7050 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7051 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7052 PROC(GETACL, enc_getacl, dec_getacl),
7053 PROC(SETACL, enc_setacl, dec_setacl),
7054 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7055 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7056 PROC(SECINFO, enc_secinfo, dec_secinfo),
7057 #if defined(CONFIG_NFS_V4_1)
7058 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7059 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7060 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7061 PROC(SEQUENCE, enc_sequence, dec_sequence),
7062 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7063 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7064 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7065 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7066 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7067 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7068 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7069 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7070 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7071 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7072 #endif /* CONFIG_NFS_V4_1 */
7073 };
7074
7075 const struct rpc_version nfs_version4 = {
7076 .number = 4,
7077 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7078 .procs = nfs4_procedures
7079 };
7080
7081 /*
7082 * Local variables:
7083 * c-basic-offset: 8
7084 * End:
7085 */
Linus' kernel tree