projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'cleanup-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 + \
150 1024) /* large value for CLID_INUSE */
151 #define encode_setclientid_confirm_maxsz \
152 (op_encode_hdr_maxsz + \
153 3 + (NFS4_VERIFIER_SIZE >> 2))
154 #define decode_setclientid_confirm_maxsz \
155 (op_decode_hdr_maxsz)
156 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
157 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
158 #define encode_share_access_maxsz \
159 (2)
160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
161 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
163 #define encode_open_maxsz (op_encode_hdr_maxsz + \
164 2 + encode_share_access_maxsz + 2 + \
165 open_owner_id_maxsz + \
166 encode_opentype_maxsz + \
167 encode_claim_null_maxsz)
168 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
170 decode_ace_maxsz)
171 #define decode_change_info_maxsz (5)
172 #define decode_open_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz + \
174 decode_change_info_maxsz + 1 + \
175 nfs4_fattr_bitmap_maxsz + \
176 decode_delegation_maxsz)
177 #define encode_open_confirm_maxsz \
178 (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 1)
180 #define decode_open_confirm_maxsz \
181 (op_decode_hdr_maxsz + \
182 decode_stateid_maxsz)
183 #define encode_open_downgrade_maxsz \
184 (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 1 + \
186 encode_share_access_maxsz)
187 #define decode_open_downgrade_maxsz \
188 (op_decode_hdr_maxsz + \
189 decode_stateid_maxsz)
190 #define encode_close_maxsz (op_encode_hdr_maxsz + \
191 1 + encode_stateid_maxsz)
192 #define decode_close_maxsz (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + \
196 encode_attrs_maxsz)
197 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
198 nfs4_fattr_bitmap_maxsz)
199 #define encode_read_maxsz (op_encode_hdr_maxsz + \
200 encode_stateid_maxsz + 3)
201 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
202 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
203 2 + encode_verifier_maxsz + 5 + \
204 nfs4_label_maxsz)
205 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
206 decode_verifier_maxsz + \
207 nfs4_label_maxsz + nfs4_fattr_maxsz)
208 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
209 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
210 #define encode_write_maxsz (op_encode_hdr_maxsz + \
211 encode_stateid_maxsz + 4)
212 #define decode_write_maxsz (op_decode_hdr_maxsz + \
213 2 + decode_verifier_maxsz)
214 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
215 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
216 decode_verifier_maxsz)
217 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
218 nfs4_name_maxsz)
219 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
220 decode_change_info_maxsz)
221 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
222 2 * nfs4_name_maxsz)
223 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
224 decode_change_info_maxsz + \
225 decode_change_info_maxsz)
226 #define encode_link_maxsz (op_encode_hdr_maxsz + \
227 nfs4_name_maxsz)
228 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
229 #define encode_lockowner_maxsz (7)
230 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
231 7 + \
232 1 + encode_stateid_maxsz + 1 + \
233 encode_lockowner_maxsz)
234 #define decode_lock_denied_maxsz \
235 (8 + decode_lockowner_maxsz)
236 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
237 decode_lock_denied_maxsz)
238 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
239 encode_lockowner_maxsz)
240 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
241 decode_lock_denied_maxsz)
242 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
243 encode_stateid_maxsz + \
244 4)
245 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
246 decode_stateid_maxsz)
247 #define encode_release_lockowner_maxsz \
248 (op_encode_hdr_maxsz + \
249 encode_lockowner_maxsz)
250 #define decode_release_lockowner_maxsz \
251 (op_decode_hdr_maxsz)
252 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
253 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
254 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
255 1 + nfs4_name_maxsz + \
256 1 + \
257 nfs4_fattr_maxsz)
258 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
259 #define encode_create_maxsz (op_encode_hdr_maxsz + \
260 1 + 2 + nfs4_name_maxsz + \
261 encode_attrs_maxsz)
262 #define decode_create_maxsz (op_decode_hdr_maxsz + \
263 decode_change_info_maxsz + \
264 nfs4_fattr_bitmap_maxsz)
265 #define encode_statfs_maxsz (encode_getattr_maxsz)
266 #define decode_statfs_maxsz (decode_getattr_maxsz)
267 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
268 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
269 #define encode_getacl_maxsz (encode_getattr_maxsz)
270 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
271 nfs4_fattr_bitmap_maxsz + 1)
272 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
273 encode_stateid_maxsz + 3)
274 #define decode_setacl_maxsz (decode_setattr_maxsz)
275 #define encode_fs_locations_maxsz \
276 (encode_getattr_maxsz)
277 #define decode_fs_locations_maxsz \
278 (0)
279 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
280 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
281
282 #if defined(CONFIG_NFS_V4_1)
283 #define NFS4_MAX_MACHINE_NAME_LEN (64)
284 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
285 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
286
287 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
288 encode_verifier_maxsz + \
289 1 /* co_ownerid.len */ + \
290 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
291 1 /* flags */ + \
292 1 /* spa_how */ + \
293 /* max is SP4_MACH_CRED (for now) */ + \
294 1 + NFS4_OP_MAP_NUM_WORDS + \
295 1 + NFS4_OP_MAP_NUM_WORDS + \
296 1 /* implementation id array of size 1 */ + \
297 1 /* nii_domain */ + \
298 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
299 1 /* nii_name */ + \
300 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
301 3 /* nii_date */)
302 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
303 2 /* eir_clientid */ + \
304 1 /* eir_sequenceid */ + \
305 1 /* eir_flags */ + \
306 1 /* spr_how */ + \
307 /* max is SP4_MACH_CRED (for now) */ + \
308 1 + NFS4_OP_MAP_NUM_WORDS + \
309 1 + NFS4_OP_MAP_NUM_WORDS + \
310 2 /* eir_server_owner.so_minor_id */ + \
311 /* eir_server_owner.so_major_id<> */ \
312 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
313 /* eir_server_scope<> */ \
314 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
315 1 /* eir_server_impl_id array length */ + \
316 1 /* nii_domain */ + \
317 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
318 1 /* nii_name */ + \
319 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
320 3 /* nii_date */)
321 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
322 #define decode_channel_attrs_maxsz (6 + \
323 1 /* ca_rdma_ird.len */ + \
324 1 /* ca_rdma_ird */)
325 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
326 2 /* csa_clientid */ + \
327 1 /* csa_sequence */ + \
328 1 /* csa_flags */ + \
329 encode_channel_attrs_maxsz + \
330 encode_channel_attrs_maxsz + \
331 1 /* csa_cb_program */ + \
332 1 /* csa_sec_parms.len (1) */ + \
333 1 /* cb_secflavor (AUTH_SYS) */ + \
334 1 /* stamp */ + \
335 1 /* machinename.len */ + \
336 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
337 1 /* uid */ + \
338 1 /* gid */ + \
339 1 /* gids.len (0) */)
340 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
341 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
342 1 /* csr_sequence */ + \
343 1 /* csr_flags */ + \
344 decode_channel_attrs_maxsz + \
345 decode_channel_attrs_maxsz)
346 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
347 /* bctsa_sessid */ \
348 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
349 1 /* bctsa_dir */ + \
350 1 /* bctsa_use_conn_in_rdma_mode */)
351 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
352 /* bctsr_sessid */ \
353 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
354 1 /* bctsr_dir */ + \
355 1 /* bctsr_use_conn_in_rdma_mode */)
356 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
357 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
358 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
359 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
360 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
361 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
362 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
363 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
364 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
365 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
367 encode_verifier_maxsz)
368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
369 2 /* nfs_cookie4 gdlr_cookie */ + \
370 decode_verifier_maxsz \
371 /* verifier4 gdlr_verifier */ + \
372 1 /* gdlr_deviceid_list count */ + \
373 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
374 NFS4_DEVICEID4_SIZE) \
375 /* gdlr_deviceid_list */ + \
376 1 /* bool gdlr_eof */)
377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
378 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
380 1 /* layout type */ + \
381 1 /* opaque devaddr4 length */ + \
382 /* devaddr4 payload is read into page */ \
383 1 /* notification bitmap length */ + \
384 1 /* notification bitmap */)
385 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
386 encode_stateid_maxsz)
387 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
388 decode_stateid_maxsz + \
389 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
391 2 /* offset */ + \
392 2 /* length */ + \
393 1 /* reclaim */ + \
394 encode_stateid_maxsz + \
395 1 /* new offset (true) */ + \
396 2 /* last byte written */ + \
397 1 /* nt_timechanged (false) */ + \
398 1 /* layoutupdate4 layout type */ + \
399 1 /* NULL filelayout layoutupdate4 payload */)
400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
402 encode_stateid_maxsz + \
403 1 /* FIXME: opaque lrf_body always empty at the moment */)
404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
405 1 + decode_stateid_maxsz)
406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
408 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
409 XDR_QUADLEN(NFS4_STATEID_SIZE))
410 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
411 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
412 XDR_QUADLEN(NFS4_STATEID_SIZE))
413 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
414 #else /* CONFIG_NFS_V4_1 */
415 #define encode_sequence_maxsz 0
416 #define decode_sequence_maxsz 0
417 #endif /* CONFIG_NFS_V4_1 */
418
419 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
420 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
421 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
422 encode_sequence_maxsz + \
423 encode_putfh_maxsz + \
424 encode_read_maxsz)
425 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
426 decode_sequence_maxsz + \
427 decode_putfh_maxsz + \
428 decode_read_maxsz)
429 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
430 encode_sequence_maxsz + \
431 encode_putfh_maxsz + \
432 encode_readlink_maxsz)
433 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_readlink_maxsz)
437 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
438 encode_sequence_maxsz + \
439 encode_putfh_maxsz + \
440 encode_readdir_maxsz)
441 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_readdir_maxsz)
445 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
446 encode_sequence_maxsz + \
447 encode_putfh_maxsz + \
448 encode_write_maxsz + \
449 encode_getattr_maxsz)
450 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
451 decode_sequence_maxsz + \
452 decode_putfh_maxsz + \
453 decode_write_maxsz + \
454 decode_getattr_maxsz)
455 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_commit_maxsz)
459 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
460 decode_sequence_maxsz + \
461 decode_putfh_maxsz + \
462 decode_commit_maxsz)
463 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_open_maxsz + \
467 encode_access_maxsz + \
468 encode_getfh_maxsz + \
469 encode_getattr_maxsz)
470 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_open_maxsz + \
474 decode_access_maxsz + \
475 decode_getfh_maxsz + \
476 decode_getattr_maxsz)
477 #define NFS4_enc_open_confirm_sz \
478 (compound_encode_hdr_maxsz + \
479 encode_putfh_maxsz + \
480 encode_open_confirm_maxsz)
481 #define NFS4_dec_open_confirm_sz \
482 (compound_decode_hdr_maxsz + \
483 decode_putfh_maxsz + \
484 decode_open_confirm_maxsz)
485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
486 encode_sequence_maxsz + \
487 encode_putfh_maxsz + \
488 encode_open_maxsz + \
489 encode_access_maxsz + \
490 encode_getattr_maxsz)
491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getattr_maxsz)
497 #define NFS4_enc_open_downgrade_sz \
498 (compound_encode_hdr_maxsz + \
499 encode_sequence_maxsz + \
500 encode_putfh_maxsz + \
501 encode_open_downgrade_maxsz + \
502 encode_getattr_maxsz)
503 #define NFS4_dec_open_downgrade_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_sequence_maxsz + \
506 decode_putfh_maxsz + \
507 decode_open_downgrade_maxsz + \
508 decode_getattr_maxsz)
509 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
510 encode_sequence_maxsz + \
511 encode_putfh_maxsz + \
512 encode_close_maxsz + \
513 encode_getattr_maxsz)
514 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_close_maxsz + \
518 decode_getattr_maxsz)
519 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
520 encode_sequence_maxsz + \
521 encode_putfh_maxsz + \
522 encode_setattr_maxsz + \
523 encode_getattr_maxsz)
524 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
525 decode_sequence_maxsz + \
526 decode_putfh_maxsz + \
527 decode_setattr_maxsz + \
528 decode_getattr_maxsz)
529 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
530 encode_sequence_maxsz + \
531 encode_putfh_maxsz + \
532 encode_fsinfo_maxsz)
533 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
534 decode_sequence_maxsz + \
535 decode_putfh_maxsz + \
536 decode_fsinfo_maxsz)
537 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
538 encode_renew_maxsz)
539 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
540 decode_renew_maxsz)
541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
542 encode_setclientid_maxsz)
543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
544 decode_setclientid_maxsz)
545 #define NFS4_enc_setclientid_confirm_sz \
546 (compound_encode_hdr_maxsz + \
547 encode_setclientid_confirm_maxsz)
548 #define NFS4_dec_setclientid_confirm_sz \
549 (compound_decode_hdr_maxsz + \
550 decode_setclientid_confirm_maxsz)
551 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
552 encode_sequence_maxsz + \
553 encode_putfh_maxsz + \
554 encode_lock_maxsz)
555 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
556 decode_sequence_maxsz + \
557 decode_putfh_maxsz + \
558 decode_lock_maxsz)
559 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
560 encode_sequence_maxsz + \
561 encode_putfh_maxsz + \
562 encode_lockt_maxsz)
563 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
564 decode_sequence_maxsz + \
565 decode_putfh_maxsz + \
566 decode_lockt_maxsz)
567 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_locku_maxsz)
571 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
572 decode_sequence_maxsz + \
573 decode_putfh_maxsz + \
574 decode_locku_maxsz)
575 #define NFS4_enc_release_lockowner_sz \
576 (compound_encode_hdr_maxsz + \
577 encode_lockowner_maxsz)
578 #define NFS4_dec_release_lockowner_sz \
579 (compound_decode_hdr_maxsz + \
580 decode_lockowner_maxsz)
581 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
582 encode_sequence_maxsz + \
583 encode_putfh_maxsz + \
584 encode_access_maxsz + \
585 encode_getattr_maxsz)
586 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
587 decode_sequence_maxsz + \
588 decode_putfh_maxsz + \
589 decode_access_maxsz + \
590 decode_getattr_maxsz)
591 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_getattr_maxsz + \
595 encode_renew_maxsz)
596 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
597 decode_sequence_maxsz + \
598 decode_putfh_maxsz + \
599 decode_getattr_maxsz + \
600 decode_renew_maxsz)
601 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
602 encode_sequence_maxsz + \
603 encode_putfh_maxsz + \
604 encode_lookup_maxsz + \
605 encode_getattr_maxsz + \
606 encode_getfh_maxsz)
607 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
608 decode_sequence_maxsz + \
609 decode_putfh_maxsz + \
610 decode_lookup_maxsz + \
611 decode_getattr_maxsz + \
612 decode_getfh_maxsz)
613 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
614 encode_sequence_maxsz + \
615 encode_putrootfh_maxsz + \
616 encode_getattr_maxsz + \
617 encode_getfh_maxsz)
618 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
619 decode_sequence_maxsz + \
620 decode_putrootfh_maxsz + \
621 decode_getattr_maxsz + \
622 decode_getfh_maxsz)
623 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_remove_maxsz)
627 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
628 decode_sequence_maxsz + \
629 decode_putfh_maxsz + \
630 decode_remove_maxsz)
631 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
632 encode_sequence_maxsz + \
633 encode_putfh_maxsz + \
634 encode_savefh_maxsz + \
635 encode_putfh_maxsz + \
636 encode_rename_maxsz)
637 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
638 decode_sequence_maxsz + \
639 decode_putfh_maxsz + \
640 decode_savefh_maxsz + \
641 decode_putfh_maxsz + \
642 decode_rename_maxsz)
643 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
644 encode_sequence_maxsz + \
645 encode_putfh_maxsz + \
646 encode_savefh_maxsz + \
647 encode_putfh_maxsz + \
648 encode_link_maxsz + \
649 encode_restorefh_maxsz + \
650 encode_getattr_maxsz)
651 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
652 decode_sequence_maxsz + \
653 decode_putfh_maxsz + \
654 decode_savefh_maxsz + \
655 decode_putfh_maxsz + \
656 decode_link_maxsz + \
657 decode_restorefh_maxsz + \
658 decode_getattr_maxsz)
659 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
660 encode_sequence_maxsz + \
661 encode_putfh_maxsz + \
662 encode_symlink_maxsz + \
663 encode_getattr_maxsz + \
664 encode_getfh_maxsz)
665 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
666 decode_sequence_maxsz + \
667 decode_putfh_maxsz + \
668 decode_symlink_maxsz + \
669 decode_getattr_maxsz + \
670 decode_getfh_maxsz)
671 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
672 encode_sequence_maxsz + \
673 encode_putfh_maxsz + \
674 encode_create_maxsz + \
675 encode_getfh_maxsz + \
676 encode_getattr_maxsz)
677 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
678 decode_sequence_maxsz + \
679 decode_putfh_maxsz + \
680 decode_create_maxsz + \
681 decode_getfh_maxsz + \
682 decode_getattr_maxsz)
683 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_putfh_maxsz + \
686 encode_getattr_maxsz)
687 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
688 decode_sequence_maxsz + \
689 decode_putfh_maxsz + \
690 decode_getattr_maxsz)
691 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
692 encode_sequence_maxsz + \
693 encode_putfh_maxsz + \
694 encode_statfs_maxsz)
695 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
696 decode_sequence_maxsz + \
697 decode_putfh_maxsz + \
698 decode_statfs_maxsz)
699 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
700 encode_sequence_maxsz + \
701 encode_putfh_maxsz + \
702 encode_getattr_maxsz)
703 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_getattr_maxsz)
707 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
708 encode_sequence_maxsz + \
709 encode_putfh_maxsz + \
710 encode_delegreturn_maxsz + \
711 encode_getattr_maxsz)
712 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
713 decode_sequence_maxsz + \
714 decode_delegreturn_maxsz + \
715 decode_getattr_maxsz)
716 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
717 encode_sequence_maxsz + \
718 encode_putfh_maxsz + \
719 encode_getacl_maxsz)
720 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
721 decode_sequence_maxsz + \
722 decode_putfh_maxsz + \
723 decode_getacl_maxsz)
724 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
725 encode_sequence_maxsz + \
726 encode_putfh_maxsz + \
727 encode_setacl_maxsz)
728 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
729 decode_sequence_maxsz + \
730 decode_putfh_maxsz + \
731 decode_setacl_maxsz)
732 #define NFS4_enc_fs_locations_sz \
733 (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_putfh_maxsz + \
736 encode_lookup_maxsz + \
737 encode_fs_locations_maxsz + \
738 encode_renew_maxsz)
739 #define NFS4_dec_fs_locations_sz \
740 (compound_decode_hdr_maxsz + \
741 decode_sequence_maxsz + \
742 decode_putfh_maxsz + \
743 decode_lookup_maxsz + \
744 decode_fs_locations_maxsz + \
745 decode_renew_maxsz)
746 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
747 encode_sequence_maxsz + \
748 encode_putfh_maxsz + \
749 encode_secinfo_maxsz)
750 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
751 decode_sequence_maxsz + \
752 decode_putfh_maxsz + \
753 decode_secinfo_maxsz)
754 #define NFS4_enc_fsid_present_sz \
755 (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_getfh_maxsz + \
759 encode_renew_maxsz)
760 #define NFS4_dec_fsid_present_sz \
761 (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_getfh_maxsz + \
765 decode_renew_maxsz)
766 #if defined(CONFIG_NFS_V4_1)
767 #define NFS4_enc_bind_conn_to_session_sz \
768 (compound_encode_hdr_maxsz + \
769 encode_bind_conn_to_session_maxsz)
770 #define NFS4_dec_bind_conn_to_session_sz \
771 (compound_decode_hdr_maxsz + \
772 decode_bind_conn_to_session_maxsz)
773 #define NFS4_enc_exchange_id_sz \
774 (compound_encode_hdr_maxsz + \
775 encode_exchange_id_maxsz)
776 #define NFS4_dec_exchange_id_sz \
777 (compound_decode_hdr_maxsz + \
778 decode_exchange_id_maxsz)
779 #define NFS4_enc_create_session_sz \
780 (compound_encode_hdr_maxsz + \
781 encode_create_session_maxsz)
782 #define NFS4_dec_create_session_sz \
783 (compound_decode_hdr_maxsz + \
784 decode_create_session_maxsz)
785 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
786 encode_destroy_session_maxsz)
787 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
788 decode_destroy_session_maxsz)
789 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
790 encode_destroy_clientid_maxsz)
791 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
792 decode_destroy_clientid_maxsz)
793 #define NFS4_enc_sequence_sz \
794 (compound_decode_hdr_maxsz + \
795 encode_sequence_maxsz)
796 #define NFS4_dec_sequence_sz \
797 (compound_decode_hdr_maxsz + \
798 decode_sequence_maxsz)
799 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
800 encode_sequence_maxsz + \
801 encode_putrootfh_maxsz + \
802 encode_fsinfo_maxsz)
803 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
804 decode_sequence_maxsz + \
805 decode_putrootfh_maxsz + \
806 decode_fsinfo_maxsz)
807 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
808 encode_sequence_maxsz + \
809 encode_reclaim_complete_maxsz)
810 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
811 decode_sequence_maxsz + \
812 decode_reclaim_complete_maxsz)
813 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
814 encode_sequence_maxsz + \
815 encode_putfh_maxsz + \
816 encode_getdevicelist_maxsz)
817 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
818 decode_sequence_maxsz + \
819 decode_putfh_maxsz + \
820 decode_getdevicelist_maxsz)
821 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
822 encode_sequence_maxsz +\
823 encode_getdeviceinfo_maxsz)
824 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_getdeviceinfo_maxsz)
827 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
828 encode_sequence_maxsz + \
829 encode_putfh_maxsz + \
830 encode_layoutget_maxsz)
831 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
832 decode_sequence_maxsz + \
833 decode_putfh_maxsz + \
834 decode_layoutget_maxsz)
835 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
836 encode_sequence_maxsz +\
837 encode_putfh_maxsz + \
838 encode_layoutcommit_maxsz + \
839 encode_getattr_maxsz)
840 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
841 decode_sequence_maxsz + \
842 decode_putfh_maxsz + \
843 decode_layoutcommit_maxsz + \
844 decode_getattr_maxsz)
845 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
846 encode_sequence_maxsz + \
847 encode_putfh_maxsz + \
848 encode_layoutreturn_maxsz)
849 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
850 decode_sequence_maxsz + \
851 decode_putfh_maxsz + \
852 decode_layoutreturn_maxsz)
853 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
854 encode_sequence_maxsz + \
855 encode_putrootfh_maxsz +\
856 encode_secinfo_no_name_maxsz)
857 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_putrootfh_maxsz + \
860 decode_secinfo_no_name_maxsz)
861 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
862 encode_sequence_maxsz + \
863 encode_test_stateid_maxsz)
864 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
865 decode_sequence_maxsz + \
866 decode_test_stateid_maxsz)
867 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
868 encode_sequence_maxsz + \
869 encode_free_stateid_maxsz)
870 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
871 decode_sequence_maxsz + \
872 decode_free_stateid_maxsz)
873
874 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
875 compound_encode_hdr_maxsz +
876 encode_sequence_maxsz +
877 encode_putfh_maxsz +
878 encode_getattr_maxsz) *
879 XDR_UNIT);
880
881 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
882 compound_decode_hdr_maxsz +
883 decode_sequence_maxsz +
884 decode_putfh_maxsz) *
885 XDR_UNIT);
886
887 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
888 compound_decode_hdr_maxsz +
889 decode_sequence_maxsz) *
890 XDR_UNIT);
891 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
892 #endif /* CONFIG_NFS_V4_1 */
893
894 static const umode_t nfs_type2fmt[] = {
895 [NF4BAD] = 0,
896 [NF4REG] = S_IFREG,
897 [NF4DIR] = S_IFDIR,
898 [NF4BLK] = S_IFBLK,
899 [NF4CHR] = S_IFCHR,
900 [NF4LNK] = S_IFLNK,
901 [NF4SOCK] = S_IFSOCK,
902 [NF4FIFO] = S_IFIFO,
903 [NF4ATTRDIR] = 0,
904 [NF4NAMEDATTR] = 0,
905 };
906
907 struct compound_hdr {
908 int32_t status;
909 uint32_t nops;
910 __be32 * nops_p;
911 uint32_t taglen;
912 char * tag;
913 uint32_t replen; /* expected reply words */
914 u32 minorversion;
915 };
916
917 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
918 {
919 __be32 *p = xdr_reserve_space(xdr, nbytes);
920 BUG_ON(!p);
921 return p;
922 }
923
924 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
925 {
926 __be32 *p;
927
928 p = xdr_reserve_space(xdr, len);
929 xdr_encode_opaque_fixed(p, buf, len);
930 }
931
932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
933 {
934 __be32 *p;
935
936 p = reserve_space(xdr, 4 + len);
937 xdr_encode_opaque(p, str, len);
938 }
939
940 static void encode_uint32(struct xdr_stream *xdr, u32 n)
941 {
942 __be32 *p;
943
944 p = reserve_space(xdr, 4);
945 *p = cpu_to_be32(n);
946 }
947
948 static void encode_uint64(struct xdr_stream *xdr, u64 n)
949 {
950 __be32 *p;
951
952 p = reserve_space(xdr, 8);
953 xdr_encode_hyper(p, n);
954 }
955
956 static void encode_nfs4_seqid(struct xdr_stream *xdr,
957 const struct nfs_seqid *seqid)
958 {
959 encode_uint32(xdr, seqid->sequence->counter);
960 }
961
962 static void encode_compound_hdr(struct xdr_stream *xdr,
963 struct rpc_rqst *req,
964 struct compound_hdr *hdr)
965 {
966 __be32 *p;
967 struct rpc_auth *auth = req->rq_cred->cr_auth;
968
969 /* initialize running count of expected bytes in reply.
970 * NOTE: the replied tag SHOULD be the same is the one sent,
971 * but this is not required as a MUST for the server to do so. */
972 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
973
974 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
975 encode_string(xdr, hdr->taglen, hdr->tag);
976 p = reserve_space(xdr, 8);
977 *p++ = cpu_to_be32(hdr->minorversion);
978 hdr->nops_p = p;
979 *p = cpu_to_be32(hdr->nops);
980 }
981
982 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
983 uint32_t replen,
984 struct compound_hdr *hdr)
985 {
986 encode_uint32(xdr, op);
987 hdr->nops++;
988 hdr->replen += replen;
989 }
990
991 static void encode_nops(struct compound_hdr *hdr)
992 {
993 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
994 *hdr->nops_p = htonl(hdr->nops);
995 }
996
997 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
998 {
999 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1000 }
1001
1002 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1003 {
1004 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1005 }
1006
1007 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1008 const struct nfs4_label *label,
1009 const struct nfs_server *server)
1010 {
1011 char owner_name[IDMAP_NAMESZ];
1012 char owner_group[IDMAP_NAMESZ];
1013 int owner_namelen = 0;
1014 int owner_grouplen = 0;
1015 __be32 *p;
1016 unsigned i;
1017 uint32_t len = 0;
1018 uint32_t bmval_len;
1019 uint32_t bmval[3] = { 0 };
1020
1021 /*
1022 * We reserve enough space to write the entire attribute buffer at once.
1023 * In the worst-case, this would be
1024 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1025 * = 40 bytes, plus any contribution from variable-length fields
1026 * such as owner/group.
1027 */
1028 if (iap->ia_valid & ATTR_SIZE) {
1029 bmval[0] |= FATTR4_WORD0_SIZE;
1030 len += 8;
1031 }
1032 if (iap->ia_valid & ATTR_MODE) {
1033 bmval[1] |= FATTR4_WORD1_MODE;
1034 len += 4;
1035 }
1036 if (iap->ia_valid & ATTR_UID) {
1037 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1038 if (owner_namelen < 0) {
1039 dprintk("nfs: couldn't resolve uid %d to string\n",
1040 from_kuid(&init_user_ns, iap->ia_uid));
1041 /* XXX */
1042 strcpy(owner_name, "nobody");
1043 owner_namelen = sizeof("nobody") - 1;
1044 /* goto out; */
1045 }
1046 bmval[1] |= FATTR4_WORD1_OWNER;
1047 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1048 }
1049 if (iap->ia_valid & ATTR_GID) {
1050 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1051 if (owner_grouplen < 0) {
1052 dprintk("nfs: couldn't resolve gid %d to string\n",
1053 from_kgid(&init_user_ns, iap->ia_gid));
1054 strcpy(owner_group, "nobody");
1055 owner_grouplen = sizeof("nobody") - 1;
1056 /* goto out; */
1057 }
1058 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1059 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1060 }
1061 if (iap->ia_valid & ATTR_ATIME_SET) {
1062 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063 len += 16;
1064 } else if (iap->ia_valid & ATTR_ATIME) {
1065 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1066 len += 4;
1067 }
1068 if (iap->ia_valid & ATTR_MTIME_SET) {
1069 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070 len += 16;
1071 } else if (iap->ia_valid & ATTR_MTIME) {
1072 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1073 len += 4;
1074 }
1075 if (label) {
1076 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1077 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1078 }
1079
1080 if (bmval[2] != 0)
1081 bmval_len = 3;
1082 else if (bmval[1] != 0)
1083 bmval_len = 2;
1084 else
1085 bmval_len = 1;
1086
1087 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1088
1089 *p++ = cpu_to_be32(bmval_len);
1090 for (i = 0; i < bmval_len; i++)
1091 *p++ = cpu_to_be32(bmval[i]);
1092 *p++ = cpu_to_be32(len);
1093
1094 if (bmval[0] & FATTR4_WORD0_SIZE)
1095 p = xdr_encode_hyper(p, iap->ia_size);
1096 if (bmval[1] & FATTR4_WORD1_MODE)
1097 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1098 if (bmval[1] & FATTR4_WORD1_OWNER)
1099 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1100 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1101 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1102 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1103 if (iap->ia_valid & ATTR_ATIME_SET) {
1104 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1105 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1106 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1107 } else
1108 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1109 }
1110 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1111 if (iap->ia_valid & ATTR_MTIME_SET) {
1112 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1114 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1115 } else
1116 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117 }
1118 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1119 *p++ = cpu_to_be32(label->lfs);
1120 *p++ = cpu_to_be32(label->pi);
1121 *p++ = cpu_to_be32(label->len);
1122 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1123 }
1124
1125 /* out: */
1126 }
1127
1128 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1129 {
1130 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1131 encode_uint32(xdr, access);
1132 }
1133
1134 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1135 {
1136 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1137 encode_nfs4_seqid(xdr, arg->seqid);
1138 encode_nfs4_stateid(xdr, arg->stateid);
1139 }
1140
1141 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1142 {
1143 __be32 *p;
1144
1145 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1146 p = reserve_space(xdr, 12);
1147 p = xdr_encode_hyper(p, args->offset);
1148 *p = cpu_to_be32(args->count);
1149 }
1150
1151 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1152 {
1153 __be32 *p;
1154
1155 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1156 encode_uint32(xdr, create->ftype);
1157
1158 switch (create->ftype) {
1159 case NF4LNK:
1160 p = reserve_space(xdr, 4);
1161 *p = cpu_to_be32(create->u.symlink.len);
1162 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1163 break;
1164
1165 case NF4BLK: case NF4CHR:
1166 p = reserve_space(xdr, 8);
1167 *p++ = cpu_to_be32(create->u.device.specdata1);
1168 *p = cpu_to_be32(create->u.device.specdata2);
1169 break;
1170
1171 default:
1172 break;
1173 }
1174
1175 encode_string(xdr, create->name->len, create->name->name);
1176 encode_attrs(xdr, create->attrs, create->label, create->server);
1177 }
1178
1179 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1180 {
1181 __be32 *p;
1182
1183 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1184 p = reserve_space(xdr, 8);
1185 *p++ = cpu_to_be32(1);
1186 *p = cpu_to_be32(bitmap);
1187 }
1188
1189 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1190 {
1191 __be32 *p;
1192
1193 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194 p = reserve_space(xdr, 12);
1195 *p++ = cpu_to_be32(2);
1196 *p++ = cpu_to_be32(bm0);
1197 *p = cpu_to_be32(bm1);
1198 }
1199
1200 static void
1201 encode_getattr_three(struct xdr_stream *xdr,
1202 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1203 struct compound_hdr *hdr)
1204 {
1205 __be32 *p;
1206
1207 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208 if (bm2) {
1209 p = reserve_space(xdr, 16);
1210 *p++ = cpu_to_be32(3);
1211 *p++ = cpu_to_be32(bm0);
1212 *p++ = cpu_to_be32(bm1);
1213 *p = cpu_to_be32(bm2);
1214 } else if (bm1) {
1215 p = reserve_space(xdr, 12);
1216 *p++ = cpu_to_be32(2);
1217 *p++ = cpu_to_be32(bm0);
1218 *p = cpu_to_be32(bm1);
1219 } else {
1220 p = reserve_space(xdr, 8);
1221 *p++ = cpu_to_be32(1);
1222 *p = cpu_to_be32(bm0);
1223 }
1224 }
1225
1226 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1227 {
1228 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1229 bitmask[1] & nfs4_fattr_bitmap[1],
1230 bitmask[2] & nfs4_fattr_bitmap[2],
1231 hdr);
1232 }
1233
1234 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1235 const u32 *open_bitmap,
1236 struct compound_hdr *hdr)
1237 {
1238 encode_getattr_three(xdr,
1239 bitmask[0] & open_bitmap[0],
1240 bitmask[1] & open_bitmap[1],
1241 bitmask[2] & open_bitmap[2],
1242 hdr);
1243 }
1244
1245 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1246 {
1247 encode_getattr_three(xdr,
1248 bitmask[0] & nfs4_fsinfo_bitmap[0],
1249 bitmask[1] & nfs4_fsinfo_bitmap[1],
1250 bitmask[2] & nfs4_fsinfo_bitmap[2],
1251 hdr);
1252 }
1253
1254 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1255 {
1256 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1257 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1258 }
1259
1260 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1261 {
1262 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1263 }
1264
1265 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1266 {
1267 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1268 encode_string(xdr, name->len, name->name);
1269 }
1270
1271 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1272 {
1273 if (fl->fl_type == F_RDLCK)
1274 return block ? NFS4_READW_LT : NFS4_READ_LT;
1275 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1276 }
1277
1278 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1279 {
1280 if (fl->fl_end == OFFSET_MAX)
1281 return ~(uint64_t)0;
1282 return fl->fl_end - fl->fl_start + 1;
1283 }
1284
1285 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1286 {
1287 __be32 *p;
1288
1289 p = reserve_space(xdr, 32);
1290 p = xdr_encode_hyper(p, lowner->clientid);
1291 *p++ = cpu_to_be32(20);
1292 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1293 *p++ = cpu_to_be32(lowner->s_dev);
1294 xdr_encode_hyper(p, lowner->id);
1295 }
1296
1297 /*
1298 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1299 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1300 */
1301 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1302 {
1303 __be32 *p;
1304
1305 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1306 p = reserve_space(xdr, 28);
1307 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1308 *p++ = cpu_to_be32(args->reclaim);
1309 p = xdr_encode_hyper(p, args->fl->fl_start);
1310 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311 *p = cpu_to_be32(args->new_lock_owner);
1312 if (args->new_lock_owner){
1313 encode_nfs4_seqid(xdr, args->open_seqid);
1314 encode_nfs4_stateid(xdr, args->open_stateid);
1315 encode_nfs4_seqid(xdr, args->lock_seqid);
1316 encode_lockowner(xdr, &args->lock_owner);
1317 }
1318 else {
1319 encode_nfs4_stateid(xdr, args->lock_stateid);
1320 encode_nfs4_seqid(xdr, args->lock_seqid);
1321 }
1322 }
1323
1324 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1329 p = reserve_space(xdr, 20);
1330 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1331 p = xdr_encode_hyper(p, args->fl->fl_start);
1332 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1333 encode_lockowner(xdr, &args->lock_owner);
1334 }
1335
1336 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1337 {
1338 __be32 *p;
1339
1340 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1341 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1342 encode_nfs4_seqid(xdr, args->seqid);
1343 encode_nfs4_stateid(xdr, args->stateid);
1344 p = reserve_space(xdr, 16);
1345 p = xdr_encode_hyper(p, args->fl->fl_start);
1346 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1347 }
1348
1349 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1350 {
1351 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1352 encode_lockowner(xdr, lowner);
1353 }
1354
1355 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1356 {
1357 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1358 encode_string(xdr, name->len, name->name);
1359 }
1360
1361 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1362 {
1363 __be32 *p;
1364
1365 p = reserve_space(xdr, 8);
1366 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1367 case FMODE_READ:
1368 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1369 break;
1370 case FMODE_WRITE:
1371 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1372 break;
1373 case FMODE_READ|FMODE_WRITE:
1374 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1375 break;
1376 default:
1377 *p++ = cpu_to_be32(0);
1378 }
1379 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1380 }
1381
1382 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384 __be32 *p;
1385 /*
1386 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1387 * owner 4 = 32
1388 */
1389 encode_nfs4_seqid(xdr, arg->seqid);
1390 encode_share_access(xdr, arg->fmode);
1391 p = reserve_space(xdr, 36);
1392 p = xdr_encode_hyper(p, arg->clientid);
1393 *p++ = cpu_to_be32(24);
1394 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1395 *p++ = cpu_to_be32(arg->server->s_dev);
1396 *p++ = cpu_to_be32(arg->id.uniquifier);
1397 xdr_encode_hyper(p, arg->id.create_time);
1398 }
1399
1400 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1401 {
1402 struct iattr dummy;
1403 __be32 *p;
1404
1405 p = reserve_space(xdr, 4);
1406 switch(arg->createmode) {
1407 case NFS4_CREATE_UNCHECKED:
1408 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1410 break;
1411 case NFS4_CREATE_GUARDED:
1412 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1413 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1414 break;
1415 case NFS4_CREATE_EXCLUSIVE:
1416 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1417 encode_nfs4_verifier(xdr, &arg->u.verifier);
1418 break;
1419 case NFS4_CREATE_EXCLUSIVE4_1:
1420 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1421 encode_nfs4_verifier(xdr, &arg->u.verifier);
1422 dummy.ia_valid = 0;
1423 encode_attrs(xdr, &dummy, arg->label, arg->server);
1424 }
1425 }
1426
1427 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1428 {
1429 __be32 *p;
1430
1431 p = reserve_space(xdr, 4);
1432 switch (arg->open_flags & O_CREAT) {
1433 case 0:
1434 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1435 break;
1436 default:
1437 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1438 encode_createmode(xdr, arg);
1439 }
1440 }
1441
1442 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1443 {
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 switch (delegation_type) {
1448 case 0:
1449 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1450 break;
1451 case FMODE_READ:
1452 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1453 break;
1454 case FMODE_WRITE|FMODE_READ:
1455 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1456 break;
1457 default:
1458 BUG();
1459 }
1460 }
1461
1462 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1463 {
1464 __be32 *p;
1465
1466 p = reserve_space(xdr, 4);
1467 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1468 encode_string(xdr, name->len, name->name);
1469 }
1470
1471 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1472 {
1473 __be32 *p;
1474
1475 p = reserve_space(xdr, 4);
1476 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1477 encode_delegation_type(xdr, type);
1478 }
1479
1480 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1486 encode_nfs4_stateid(xdr, stateid);
1487 encode_string(xdr, name->len, name->name);
1488 }
1489
1490 static inline void encode_claim_fh(struct xdr_stream *xdr)
1491 {
1492 __be32 *p;
1493
1494 p = reserve_space(xdr, 4);
1495 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1496 }
1497
1498 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1499 {
1500 __be32 *p;
1501
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1504 encode_nfs4_stateid(xdr, stateid);
1505 }
1506
1507 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1508 {
1509 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1510 encode_openhdr(xdr, arg);
1511 encode_opentype(xdr, arg);
1512 switch (arg->claim) {
1513 case NFS4_OPEN_CLAIM_NULL:
1514 encode_claim_null(xdr, arg->name);
1515 break;
1516 case NFS4_OPEN_CLAIM_PREVIOUS:
1517 encode_claim_previous(xdr, arg->u.delegation_type);
1518 break;
1519 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1520 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1521 break;
1522 case NFS4_OPEN_CLAIM_FH:
1523 encode_claim_fh(xdr);
1524 break;
1525 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1526 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1527 break;
1528 default:
1529 BUG();
1530 }
1531 }
1532
1533 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1534 {
1535 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1536 encode_nfs4_stateid(xdr, arg->stateid);
1537 encode_nfs4_seqid(xdr, arg->seqid);
1538 }
1539
1540 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1541 {
1542 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1543 encode_nfs4_stateid(xdr, arg->stateid);
1544 encode_nfs4_seqid(xdr, arg->seqid);
1545 encode_share_access(xdr, arg->fmode);
1546 }
1547
1548 static void
1549 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1550 {
1551 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1552 encode_string(xdr, fh->size, fh->data);
1553 }
1554
1555 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1556 {
1557 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1558 }
1559
1560 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1561 {
1562 __be32 *p;
1563
1564 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565 encode_nfs4_stateid(xdr, &args->stateid);
1566
1567 p = reserve_space(xdr, 12);
1568 p = xdr_encode_hyper(p, args->offset);
1569 *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574 uint32_t attrs[3] = {
1575 FATTR4_WORD0_RDATTR_ERROR,
1576 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577 };
1578 uint32_t dircount = readdir->count >> 1;
1579 __be32 *p, verf[2];
1580 uint32_t attrlen = 0;
1581 unsigned int i;
1582
1583 if (readdir->plus) {
1584 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591 dircount >>= 1;
1592 }
1593 /* Use mounted_on_fileid only if the server supports it */
1594 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595 attrs[0] |= FATTR4_WORD0_FILEID;
1596 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597 attrs[i] &= readdir->bitmask[i];
1598 if (attrs[i] != 0)
1599 attrlen = i+1;
1600 }
1601
1602 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603 encode_uint64(xdr, readdir->cookie);
1604 encode_nfs4_verifier(xdr, &readdir->verifier);
1605 p = reserve_space(xdr, 12 + (attrlen << 2));
1606 *p++ = cpu_to_be32(dircount);
1607 *p++ = cpu_to_be32(readdir->count);
1608 *p++ = cpu_to_be32(attrlen);
1609 for (i = 0; i < attrlen; i++)
1610 *p++ = cpu_to_be32(attrs[i]);
1611 memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614 __func__,
1615 (unsigned long long)readdir->cookie,
1616 verf[0], verf[1],
1617 attrs[0] & readdir->bitmask[0],
1618 attrs[1] & readdir->bitmask[1],
1619 attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630 encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636 encode_string(xdr, oldname->len, oldname->name);
1637 encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641 struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644 encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656 __be32 *p;
1657
1658 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659 encode_nfs4_stateid(xdr, &zero_stateid);
1660 p = reserve_space(xdr, 2*4);
1661 *p++ = cpu_to_be32(1);
1662 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663 p = reserve_space(xdr, 4);
1664 *p = cpu_to_be32(arg->acl_len);
1665 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677 encode_nfs4_stateid(xdr, &arg->stateid);
1678 encode_attrs(xdr, arg->iap, arg->label, server);
1679 }
1680
1681 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1682 {
1683 __be32 *p;
1684
1685 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1686 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1687
1688 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1689 p = reserve_space(xdr, 4);
1690 *p = cpu_to_be32(setclientid->sc_prog);
1691 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1692 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1693 p = reserve_space(xdr, 4);
1694 *p = cpu_to_be32(setclientid->sc_cb_ident);
1695 }
1696
1697 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1698 {
1699 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1700 decode_setclientid_confirm_maxsz, hdr);
1701 encode_uint64(xdr, arg->clientid);
1702 encode_nfs4_verifier(xdr, &arg->confirm);
1703 }
1704
1705 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1706 {
1707 __be32 *p;
1708
1709 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1710 encode_nfs4_stateid(xdr, &args->stateid);
1711
1712 p = reserve_space(xdr, 16);
1713 p = xdr_encode_hyper(p, args->offset);
1714 *p++ = cpu_to_be32(args->stable);
1715 *p = cpu_to_be32(args->count);
1716
1717 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1718 }
1719
1720 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1721 {
1722 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1723 encode_nfs4_stateid(xdr, stateid);
1724 }
1725
1726 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1727 {
1728 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1729 encode_string(xdr, name->len, name->name);
1730 }
1731
1732 #if defined(CONFIG_NFS_V4_1)
1733 /* NFSv4.1 operations */
1734 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1735 struct nfs4_session *session,
1736 struct compound_hdr *hdr)
1737 {
1738 __be32 *p;
1739
1740 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1741 decode_bind_conn_to_session_maxsz, hdr);
1742 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1743 p = xdr_reserve_space(xdr, 8);
1744 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1745 *p = 0; /* use_conn_in_rdma_mode = False */
1746 }
1747
1748 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1749 {
1750 unsigned int i;
1751 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1752 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1753 encode_uint32(xdr, op_map->u.words[i]);
1754 }
1755
1756 static void encode_exchange_id(struct xdr_stream *xdr,
1757 struct nfs41_exchange_id_args *args,
1758 struct compound_hdr *hdr)
1759 {
1760 __be32 *p;
1761 char impl_name[IMPL_NAME_LIMIT];
1762 int len = 0;
1763
1764 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1765 encode_nfs4_verifier(xdr, args->verifier);
1766
1767 encode_string(xdr, args->id_len, args->id);
1768
1769 encode_uint32(xdr, args->flags);
1770 encode_uint32(xdr, args->state_protect.how);
1771
1772 switch (args->state_protect.how) {
1773 case SP4_NONE:
1774 break;
1775 case SP4_MACH_CRED:
1776 encode_op_map(xdr, &args->state_protect.enforce);
1777 encode_op_map(xdr, &args->state_protect.allow);
1778 break;
1779 default:
1780 WARN_ON_ONCE(1);
1781 break;
1782 }
1783
1784 if (send_implementation_id &&
1785 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787 <= sizeof(impl_name) + 1)
1788 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789 utsname()->sysname, utsname()->release,
1790 utsname()->version, utsname()->machine);
1791
1792 if (len > 0) {
1793 encode_uint32(xdr, 1); /* implementation id array length=1 */
1794
1795 encode_string(xdr,
1796 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798 encode_string(xdr, len, impl_name);
1799 /* just send zeros for nii_date - the date is in nii_name */
1800 p = reserve_space(xdr, 12);
1801 p = xdr_encode_hyper(p, 0);
1802 *p = cpu_to_be32(0);
1803 } else
1804 encode_uint32(xdr, 0); /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808 struct nfs41_create_session_args *args,
1809 struct compound_hdr *hdr)
1810 {
1811 __be32 *p;
1812 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1813 uint32_t len;
1814 struct nfs_client *clp = args->client;
1815 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1816 u32 max_resp_sz_cached;
1817
1818 /*
1819 * Assumes OPEN is the biggest non-idempotent compound.
1820 * 2 is the verifier.
1821 */
1822 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1823 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1824
1825 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1826 clp->cl_ipaddr);
1827
1828 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1829 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1830 p = xdr_encode_hyper(p, clp->cl_clientid);
1831 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1832 *p++ = cpu_to_be32(args->flags); /*flags */
1833
1834 /* Fore Channel */
1835 *p++ = cpu_to_be32(0); /* header padding size */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1837 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1838 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1839 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1840 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1841 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1842
1843 /* Back Channel */
1844 *p++ = cpu_to_be32(0); /* header padding size */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1846 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1847 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1848 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1849 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1850 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1851
1852 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1853 *p++ = cpu_to_be32(1);
1854 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1855
1856 /* authsys_parms rfc1831 */
1857 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1858 p = xdr_encode_opaque(p, machine_name, len);
1859 *p++ = cpu_to_be32(0); /* UID */
1860 *p++ = cpu_to_be32(0); /* GID */
1861 *p = cpu_to_be32(0); /* No more gids */
1862 }
1863
1864 static void encode_destroy_session(struct xdr_stream *xdr,
1865 struct nfs4_session *session,
1866 struct compound_hdr *hdr)
1867 {
1868 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1869 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1870 }
1871
1872 static void encode_destroy_clientid(struct xdr_stream *xdr,
1873 uint64_t clientid,
1874 struct compound_hdr *hdr)
1875 {
1876 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1877 encode_uint64(xdr, clientid);
1878 }
1879
1880 static void encode_reclaim_complete(struct xdr_stream *xdr,
1881 struct nfs41_reclaim_complete_args *args,
1882 struct compound_hdr *hdr)
1883 {
1884 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1885 encode_uint32(xdr, args->one_fs);
1886 }
1887 #endif /* CONFIG_NFS_V4_1 */
1888
1889 static void encode_sequence(struct xdr_stream *xdr,
1890 const struct nfs4_sequence_args *args,
1891 struct compound_hdr *hdr)
1892 {
1893 #if defined(CONFIG_NFS_V4_1)
1894 struct nfs4_session *session;
1895 struct nfs4_slot_table *tp;
1896 struct nfs4_slot *slot = args->sa_slot;
1897 __be32 *p;
1898
1899 tp = slot->table;
1900 session = tp->session;
1901 if (!session)
1902 return;
1903
1904 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1905
1906 /*
1907 * Sessionid + seqid + slotid + max slotid + cache_this
1908 */
1909 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1910 "max_slotid=%d cache_this=%d\n",
1911 __func__,
1912 ((u32 *)session->sess_id.data)[0],
1913 ((u32 *)session->sess_id.data)[1],
1914 ((u32 *)session->sess_id.data)[2],
1915 ((u32 *)session->sess_id.data)[3],
1916 slot->seq_nr, slot->slot_nr,
1917 tp->highest_used_slotid, args->sa_cache_this);
1918 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1919 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1920 *p++ = cpu_to_be32(slot->seq_nr);
1921 *p++ = cpu_to_be32(slot->slot_nr);
1922 *p++ = cpu_to_be32(tp->highest_used_slotid);
1923 *p = cpu_to_be32(args->sa_cache_this);
1924 #endif /* CONFIG_NFS_V4_1 */
1925 }
1926
1927 #ifdef CONFIG_NFS_V4_1
1928 static void
1929 encode_getdevicelist(struct xdr_stream *xdr,
1930 const struct nfs4_getdevicelist_args *args,
1931 struct compound_hdr *hdr)
1932 {
1933 __be32 *p;
1934 nfs4_verifier dummy = {
1935 .data = "dummmmmy",
1936 };
1937
1938 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1939 p = reserve_space(xdr, 16);
1940 *p++ = cpu_to_be32(args->layoutclass);
1941 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1942 xdr_encode_hyper(p, 0ULL); /* cookie */
1943 encode_nfs4_verifier(xdr, &dummy);
1944 }
1945
1946 static void
1947 encode_getdeviceinfo(struct xdr_stream *xdr,
1948 const struct nfs4_getdeviceinfo_args *args,
1949 struct compound_hdr *hdr)
1950 {
1951 __be32 *p;
1952
1953 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1954 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1955 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1956 NFS4_DEVICEID4_SIZE);
1957 *p++ = cpu_to_be32(args->pdev->layout_type);
1958 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1959 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964 const struct nfs4_layoutget_args *args,
1965 struct compound_hdr *hdr)
1966 {
1967 __be32 *p;
1968
1969 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970 p = reserve_space(xdr, 36);
1971 *p++ = cpu_to_be32(0); /* Signal layout available */
1972 *p++ = cpu_to_be32(args->type);
1973 *p++ = cpu_to_be32(args->range.iomode);
1974 p = xdr_encode_hyper(p, args->range.offset);
1975 p = xdr_encode_hyper(p, args->range.length);
1976 p = xdr_encode_hyper(p, args->minlength);
1977 encode_nfs4_stateid(xdr, &args->stateid);
1978 encode_uint32(xdr, args->maxcount);
1979
1980 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981 __func__,
1982 args->type,
1983 args->range.iomode,
1984 (unsigned long)args->range.offset,
1985 (unsigned long)args->range.length,
1986 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991 struct inode *inode,
1992 const struct nfs4_layoutcommit_args *args,
1993 struct compound_hdr *hdr)
1994 {
1995 __be32 *p;
1996
1997 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001 p = reserve_space(xdr, 20);
2002 /* Only whole file layouts */
2003 p = xdr_encode_hyper(p, 0); /* offset */
2004 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2005 *p = cpu_to_be32(0); /* reclaim */
2006 encode_nfs4_stateid(xdr, &args->stateid);
2007 p = reserve_space(xdr, 20);
2008 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2009 p = xdr_encode_hyper(p, args->lastbytewritten);
2010 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2011 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2012
2013 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2014 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2015 NFS_I(inode)->layout, xdr, args);
2016 else
2017 encode_uint32(xdr, 0); /* no layout-type payload */
2018
2019 return 0;
2020 }
2021
2022 static void
2023 encode_layoutreturn(struct xdr_stream *xdr,
2024 const struct nfs4_layoutreturn_args *args,
2025 struct compound_hdr *hdr)
2026 {
2027 __be32 *p;
2028
2029 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2030 p = reserve_space(xdr, 16);
2031 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2032 *p++ = cpu_to_be32(args->layout_type);
2033 *p++ = cpu_to_be32(IOMODE_ANY);
2034 *p = cpu_to_be32(RETURN_FILE);
2035 p = reserve_space(xdr, 16);
2036 p = xdr_encode_hyper(p, 0);
2037 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2038 spin_lock(&args->inode->i_lock);
2039 encode_nfs4_stateid(xdr, &args->stateid);
2040 spin_unlock(&args->inode->i_lock);
2041 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2042 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2043 NFS_I(args->inode)->layout, xdr, args);
2044 } else
2045 encode_uint32(xdr, 0);
2046 }
2047
2048 static int
2049 encode_secinfo_no_name(struct xdr_stream *xdr,
2050 const struct nfs41_secinfo_no_name_args *args,
2051 struct compound_hdr *hdr)
2052 {
2053 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2054 encode_uint32(xdr, args->style);
2055 return 0;
2056 }
2057
2058 static void encode_test_stateid(struct xdr_stream *xdr,
2059 struct nfs41_test_stateid_args *args,
2060 struct compound_hdr *hdr)
2061 {
2062 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2063 encode_uint32(xdr, 1);
2064 encode_nfs4_stateid(xdr, args->stateid);
2065 }
2066
2067 static void encode_free_stateid(struct xdr_stream *xdr,
2068 struct nfs41_free_stateid_args *args,
2069 struct compound_hdr *hdr)
2070 {
2071 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2072 encode_nfs4_stateid(xdr, &args->stateid);
2073 }
2074 #endif /* CONFIG_NFS_V4_1 */
2075
2076 /*
2077 * END OF "GENERIC" ENCODE ROUTINES.
2078 */
2079
2080 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2081 {
2082 #if defined(CONFIG_NFS_V4_1)
2083 struct nfs4_session *session = args->sa_slot->table->session;
2084 if (session)
2085 return session->clp->cl_mvops->minor_version;
2086 #endif /* CONFIG_NFS_V4_1 */
2087 return 0;
2088 }
2089
2090 /*
2091 * Encode an ACCESS request
2092 */
2093 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2094 const struct nfs4_accessargs *args)
2095 {
2096 struct compound_hdr hdr = {
2097 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098 };
2099
2100 encode_compound_hdr(xdr, req, &hdr);
2101 encode_sequence(xdr, &args->seq_args, &hdr);
2102 encode_putfh(xdr, args->fh, &hdr);
2103 encode_access(xdr, args->access, &hdr);
2104 encode_getfattr(xdr, args->bitmask, &hdr);
2105 encode_nops(&hdr);
2106 }
2107
2108 /*
2109 * Encode LOOKUP request
2110 */
2111 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2112 const struct nfs4_lookup_arg *args)
2113 {
2114 struct compound_hdr hdr = {
2115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116 };
2117
2118 encode_compound_hdr(xdr, req, &hdr);
2119 encode_sequence(xdr, &args->seq_args, &hdr);
2120 encode_putfh(xdr, args->dir_fh, &hdr);
2121 encode_lookup(xdr, args->name, &hdr);
2122 encode_getfh(xdr, &hdr);
2123 encode_getfattr(xdr, args->bitmask, &hdr);
2124 encode_nops(&hdr);
2125 }
2126
2127 /*
2128 * Encode LOOKUP_ROOT request
2129 */
2130 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2131 struct xdr_stream *xdr,
2132 const struct nfs4_lookup_root_arg *args)
2133 {
2134 struct compound_hdr hdr = {
2135 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136 };
2137
2138 encode_compound_hdr(xdr, req, &hdr);
2139 encode_sequence(xdr, &args->seq_args, &hdr);
2140 encode_putrootfh(xdr, &hdr);
2141 encode_getfh(xdr, &hdr);
2142 encode_getfattr(xdr, args->bitmask, &hdr);
2143 encode_nops(&hdr);
2144 }
2145
2146 /*
2147 * Encode REMOVE request
2148 */
2149 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2150 const struct nfs_removeargs *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_remove(xdr, &args->name, &hdr);
2160 encode_nops(&hdr);
2161 }
2162
2163 /*
2164 * Encode RENAME request
2165 */
2166 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2167 const struct nfs_renameargs *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->old_dir, &hdr);
2176 encode_savefh(xdr, &hdr);
2177 encode_putfh(xdr, args->new_dir, &hdr);
2178 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2179 encode_nops(&hdr);
2180 }
2181
2182 /*
2183 * Encode LINK request
2184 */
2185 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2186 const struct nfs4_link_arg *args)
2187 {
2188 struct compound_hdr hdr = {
2189 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190 };
2191
2192 encode_compound_hdr(xdr, req, &hdr);
2193 encode_sequence(xdr, &args->seq_args, &hdr);
2194 encode_putfh(xdr, args->fh, &hdr);
2195 encode_savefh(xdr, &hdr);
2196 encode_putfh(xdr, args->dir_fh, &hdr);
2197 encode_link(xdr, args->name, &hdr);
2198 encode_restorefh(xdr, &hdr);
2199 encode_getfattr(xdr, args->bitmask, &hdr);
2200 encode_nops(&hdr);
2201 }
2202
2203 /*
2204 * Encode CREATE request
2205 */
2206 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2207 const struct nfs4_create_arg *args)
2208 {
2209 struct compound_hdr hdr = {
2210 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211 };
2212
2213 encode_compound_hdr(xdr, req, &hdr);
2214 encode_sequence(xdr, &args->seq_args, &hdr);
2215 encode_putfh(xdr, args->dir_fh, &hdr);
2216 encode_create(xdr, args, &hdr);
2217 encode_getfh(xdr, &hdr);
2218 encode_getfattr(xdr, args->bitmask, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode SYMLINK request
2224 */
2225 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_create_arg *args)
2227 {
2228 nfs4_xdr_enc_create(req, xdr, args);
2229 }
2230
2231 /*
2232 * Encode GETATTR request
2233 */
2234 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2235 const struct nfs4_getattr_arg *args)
2236 {
2237 struct compound_hdr hdr = {
2238 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2239 };
2240
2241 encode_compound_hdr(xdr, req, &hdr);
2242 encode_sequence(xdr, &args->seq_args, &hdr);
2243 encode_putfh(xdr, args->fh, &hdr);
2244 encode_getfattr(xdr, args->bitmask, &hdr);
2245 encode_nops(&hdr);
2246 }
2247
2248 /*
2249 * Encode a CLOSE request
2250 */
2251 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2252 struct nfs_closeargs *args)
2253 {
2254 struct compound_hdr hdr = {
2255 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256 };
2257
2258 encode_compound_hdr(xdr, req, &hdr);
2259 encode_sequence(xdr, &args->seq_args, &hdr);
2260 encode_putfh(xdr, args->fh, &hdr);
2261 encode_close(xdr, args, &hdr);
2262 encode_getfattr(xdr, args->bitmask, &hdr);
2263 encode_nops(&hdr);
2264 }
2265
2266 /*
2267 * Encode an OPEN request
2268 */
2269 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2270 struct nfs_openargs *args)
2271 {
2272 struct compound_hdr hdr = {
2273 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274 };
2275
2276 encode_compound_hdr(xdr, req, &hdr);
2277 encode_sequence(xdr, &args->seq_args, &hdr);
2278 encode_putfh(xdr, args->fh, &hdr);
2279 encode_open(xdr, args, &hdr);
2280 encode_getfh(xdr, &hdr);
2281 if (args->access)
2282 encode_access(xdr, args->access, &hdr);
2283 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2284 encode_nops(&hdr);
2285 }
2286
2287 /*
2288 * Encode an OPEN_CONFIRM request
2289 */
2290 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2291 struct xdr_stream *xdr,
2292 struct nfs_open_confirmargs *args)
2293 {
2294 struct compound_hdr hdr = {
2295 .nops = 0,
2296 };
2297
2298 encode_compound_hdr(xdr, req, &hdr);
2299 encode_putfh(xdr, args->fh, &hdr);
2300 encode_open_confirm(xdr, args, &hdr);
2301 encode_nops(&hdr);
2302 }
2303
2304 /*
2305 * Encode an OPEN request with no attributes.
2306 */
2307 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2308 struct xdr_stream *xdr,
2309 struct nfs_openargs *args)
2310 {
2311 struct compound_hdr hdr = {
2312 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313 };
2314
2315 encode_compound_hdr(xdr, req, &hdr);
2316 encode_sequence(xdr, &args->seq_args, &hdr);
2317 encode_putfh(xdr, args->fh, &hdr);
2318 encode_open(xdr, args, &hdr);
2319 if (args->access)
2320 encode_access(xdr, args->access, &hdr);
2321 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2322 encode_nops(&hdr);
2323 }
2324
2325 /*
2326 * Encode an OPEN_DOWNGRADE request
2327 */
2328 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2329 struct xdr_stream *xdr,
2330 struct nfs_closeargs *args)
2331 {
2332 struct compound_hdr hdr = {
2333 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334 };
2335
2336 encode_compound_hdr(xdr, req, &hdr);
2337 encode_sequence(xdr, &args->seq_args, &hdr);
2338 encode_putfh(xdr, args->fh, &hdr);
2339 encode_open_downgrade(xdr, args, &hdr);
2340 encode_getfattr(xdr, args->bitmask, &hdr);
2341 encode_nops(&hdr);
2342 }
2343
2344 /*
2345 * Encode a LOCK request
2346 */
2347 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2348 struct nfs_lock_args *args)
2349 {
2350 struct compound_hdr hdr = {
2351 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352 };
2353
2354 encode_compound_hdr(xdr, req, &hdr);
2355 encode_sequence(xdr, &args->seq_args, &hdr);
2356 encode_putfh(xdr, args->fh, &hdr);
2357 encode_lock(xdr, args, &hdr);
2358 encode_nops(&hdr);
2359 }
2360
2361 /*
2362 * Encode a LOCKT request
2363 */
2364 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2365 struct nfs_lockt_args *args)
2366 {
2367 struct compound_hdr hdr = {
2368 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2369 };
2370
2371 encode_compound_hdr(xdr, req, &hdr);
2372 encode_sequence(xdr, &args->seq_args, &hdr);
2373 encode_putfh(xdr, args->fh, &hdr);
2374 encode_lockt(xdr, args, &hdr);
2375 encode_nops(&hdr);
2376 }
2377
2378 /*
2379 * Encode a LOCKU request
2380 */
2381 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2382 struct nfs_locku_args *args)
2383 {
2384 struct compound_hdr hdr = {
2385 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2386 };
2387
2388 encode_compound_hdr(xdr, req, &hdr);
2389 encode_sequence(xdr, &args->seq_args, &hdr);
2390 encode_putfh(xdr, args->fh, &hdr);
2391 encode_locku(xdr, args, &hdr);
2392 encode_nops(&hdr);
2393 }
2394
2395 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2396 struct xdr_stream *xdr,
2397 struct nfs_release_lockowner_args *args)
2398 {
2399 struct compound_hdr hdr = {
2400 .minorversion = 0,
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2405 encode_nops(&hdr);
2406 }
2407
2408 /*
2409 * Encode a READLINK request
2410 */
2411 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2412 const struct nfs4_readlink *args)
2413 {
2414 struct compound_hdr hdr = {
2415 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416 };
2417
2418 encode_compound_hdr(xdr, req, &hdr);
2419 encode_sequence(xdr, &args->seq_args, &hdr);
2420 encode_putfh(xdr, args->fh, &hdr);
2421 encode_readlink(xdr, args, req, &hdr);
2422
2423 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424 args->pgbase, args->pglen);
2425 encode_nops(&hdr);
2426 }
2427
2428 /*
2429 * Encode a READDIR request
2430 */
2431 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2432 const struct nfs4_readdir_arg *args)
2433 {
2434 struct compound_hdr hdr = {
2435 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2436 };
2437
2438 encode_compound_hdr(xdr, req, &hdr);
2439 encode_sequence(xdr, &args->seq_args, &hdr);
2440 encode_putfh(xdr, args->fh, &hdr);
2441 encode_readdir(xdr, args, req, &hdr);
2442
2443 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2444 args->pgbase, args->count);
2445 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2446 __func__, hdr.replen << 2, args->pages,
2447 args->pgbase, args->count);
2448 encode_nops(&hdr);
2449 }
2450
2451 /*
2452 * Encode a READ request
2453 */
2454 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 struct nfs_readargs *args)
2456 {
2457 struct compound_hdr hdr = {
2458 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_sequence(xdr, &args->seq_args, &hdr);
2463 encode_putfh(xdr, args->fh, &hdr);
2464 encode_read(xdr, args, &hdr);
2465
2466 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2467 args->pages, args->pgbase, args->count);
2468 req->rq_rcv_buf.flags |= XDRBUF_READ;
2469 encode_nops(&hdr);
2470 }
2471
2472 /*
2473 * Encode an SETATTR request
2474 */
2475 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2476 struct nfs_setattrargs *args)
2477 {
2478 struct compound_hdr hdr = {
2479 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480 };
2481
2482 encode_compound_hdr(xdr, req, &hdr);
2483 encode_sequence(xdr, &args->seq_args, &hdr);
2484 encode_putfh(xdr, args->fh, &hdr);
2485 encode_setattr(xdr, args, args->server, &hdr);
2486 encode_getfattr(xdr, args->bitmask, &hdr);
2487 encode_nops(&hdr);
2488 }
2489
2490 /*
2491 * Encode a GETACL request
2492 */
2493 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2494 struct nfs_getaclargs *args)
2495 {
2496 struct compound_hdr hdr = {
2497 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498 };
2499 uint32_t replen;
2500
2501 encode_compound_hdr(xdr, req, &hdr);
2502 encode_sequence(xdr, &args->seq_args, &hdr);
2503 encode_putfh(xdr, args->fh, &hdr);
2504 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2505 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2506
2507 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2508 args->acl_pages, args->acl_pgbase, args->acl_len);
2509
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * Encode a WRITE request
2515 */
2516 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_writeargs *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522
2523 encode_compound_hdr(xdr, req, &hdr);
2524 encode_sequence(xdr, &args->seq_args, &hdr);
2525 encode_putfh(xdr, args->fh, &hdr);
2526 encode_write(xdr, args, &hdr);
2527 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2528 if (args->bitmask)
2529 encode_getfattr(xdr, args->bitmask, &hdr);
2530 encode_nops(&hdr);
2531 }
2532
2533 /*
2534 * a COMMIT request
2535 */
2536 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2537 struct nfs_commitargs *args)
2538 {
2539 struct compound_hdr hdr = {
2540 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2541 };
2542
2543 encode_compound_hdr(xdr, req, &hdr);
2544 encode_sequence(xdr, &args->seq_args, &hdr);
2545 encode_putfh(xdr, args->fh, &hdr);
2546 encode_commit(xdr, args, &hdr);
2547 encode_nops(&hdr);
2548 }
2549
2550 /*
2551 * FSINFO request
2552 */
2553 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2554 struct nfs4_fsinfo_arg *args)
2555 {
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_fsinfo(xdr, args->bitmask, &hdr);
2564 encode_nops(&hdr);
2565 }
2566
2567 /*
2568 * a PATHCONF request
2569 */
2570 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2571 const struct nfs4_pathconf_arg *args)
2572 {
2573 struct compound_hdr hdr = {
2574 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575 };
2576
2577 encode_compound_hdr(xdr, req, &hdr);
2578 encode_sequence(xdr, &args->seq_args, &hdr);
2579 encode_putfh(xdr, args->fh, &hdr);
2580 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2581 &hdr);
2582 encode_nops(&hdr);
2583 }
2584
2585 /*
2586 * a STATFS request
2587 */
2588 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2589 const struct nfs4_statfs_arg *args)
2590 {
2591 struct compound_hdr hdr = {
2592 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593 };
2594
2595 encode_compound_hdr(xdr, req, &hdr);
2596 encode_sequence(xdr, &args->seq_args, &hdr);
2597 encode_putfh(xdr, args->fh, &hdr);
2598 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2599 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2600 encode_nops(&hdr);
2601 }
2602
2603 /*
2604 * GETATTR_BITMAP request
2605 */
2606 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2607 struct xdr_stream *xdr,
2608 struct nfs4_server_caps_arg *args)
2609 {
2610 struct compound_hdr hdr = {
2611 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612 };
2613
2614 encode_compound_hdr(xdr, req, &hdr);
2615 encode_sequence(xdr, &args->seq_args, &hdr);
2616 encode_putfh(xdr, args->fhandle, &hdr);
2617 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2618 FATTR4_WORD0_FH_EXPIRE_TYPE|
2619 FATTR4_WORD0_LINK_SUPPORT|
2620 FATTR4_WORD0_SYMLINK_SUPPORT|
2621 FATTR4_WORD0_ACLSUPPORT, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a RENEW request
2627 */
2628 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2629 struct nfs_client *clp)
2630 {
2631 struct compound_hdr hdr = {
2632 .nops = 0,
2633 };
2634
2635 encode_compound_hdr(xdr, req, &hdr);
2636 encode_renew(xdr, clp->cl_clientid, &hdr);
2637 encode_nops(&hdr);
2638 }
2639
2640 /*
2641 * a SETCLIENTID request
2642 */
2643 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2644 struct xdr_stream *xdr,
2645 struct nfs4_setclientid *sc)
2646 {
2647 struct compound_hdr hdr = {
2648 .nops = 0,
2649 };
2650
2651 encode_compound_hdr(xdr, req, &hdr);
2652 encode_setclientid(xdr, sc, &hdr);
2653 encode_nops(&hdr);
2654 }
2655
2656 /*
2657 * a SETCLIENTID_CONFIRM request
2658 */
2659 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2660 struct xdr_stream *xdr,
2661 struct nfs4_setclientid_res *arg)
2662 {
2663 struct compound_hdr hdr = {
2664 .nops = 0,
2665 };
2666
2667 encode_compound_hdr(xdr, req, &hdr);
2668 encode_setclientid_confirm(xdr, arg, &hdr);
2669 encode_nops(&hdr);
2670 }
2671
2672 /*
2673 * DELEGRETURN request
2674 */
2675 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2676 struct xdr_stream *xdr,
2677 const struct nfs4_delegreturnargs *args)
2678 {
2679 struct compound_hdr hdr = {
2680 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2681 };
2682
2683 encode_compound_hdr(xdr, req, &hdr);
2684 encode_sequence(xdr, &args->seq_args, &hdr);
2685 encode_putfh(xdr, args->fhandle, &hdr);
2686 encode_getfattr(xdr, args->bitmask, &hdr);
2687 encode_delegreturn(xdr, args->stateid, &hdr);
2688 encode_nops(&hdr);
2689 }
2690
2691 /*
2692 * Encode FS_LOCATIONS request
2693 */
2694 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2695 struct xdr_stream *xdr,
2696 struct nfs4_fs_locations_arg *args)
2697 {
2698 struct compound_hdr hdr = {
2699 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2700 };
2701 uint32_t replen;
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 if (args->migration) {
2706 encode_putfh(xdr, args->fh, &hdr);
2707 replen = hdr.replen;
2708 encode_fs_locations(xdr, args->bitmask, &hdr);
2709 if (args->renew)
2710 encode_renew(xdr, args->clientid, &hdr);
2711 } else {
2712 encode_putfh(xdr, args->dir_fh, &hdr);
2713 encode_lookup(xdr, args->name, &hdr);
2714 replen = hdr.replen;
2715 encode_fs_locations(xdr, args->bitmask, &hdr);
2716 }
2717
2718 /* Set up reply kvec to capture returned fs_locations array. */
2719 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2720 0, PAGE_SIZE);
2721 encode_nops(&hdr);
2722 }
2723
2724 /*
2725 * Encode SECINFO request
2726 */
2727 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2728 struct xdr_stream *xdr,
2729 struct nfs4_secinfo_arg *args)
2730 {
2731 struct compound_hdr hdr = {
2732 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2733 };
2734
2735 encode_compound_hdr(xdr, req, &hdr);
2736 encode_sequence(xdr, &args->seq_args, &hdr);
2737 encode_putfh(xdr, args->dir_fh, &hdr);
2738 encode_secinfo(xdr, args->name, &hdr);
2739 encode_nops(&hdr);
2740 }
2741
2742 /*
2743 * Encode FSID_PRESENT request
2744 */
2745 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2746 struct xdr_stream *xdr,
2747 struct nfs4_fsid_present_arg *args)
2748 {
2749 struct compound_hdr hdr = {
2750 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2751 };
2752
2753 encode_compound_hdr(xdr, req, &hdr);
2754 encode_sequence(xdr, &args->seq_args, &hdr);
2755 encode_putfh(xdr, args->fh, &hdr);
2756 encode_getfh(xdr, &hdr);
2757 if (args->renew)
2758 encode_renew(xdr, args->clientid, &hdr);
2759 encode_nops(&hdr);
2760 }
2761
2762 #if defined(CONFIG_NFS_V4_1)
2763 /*
2764 * BIND_CONN_TO_SESSION request
2765 */
2766 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2767 struct xdr_stream *xdr,
2768 struct nfs_client *clp)
2769 {
2770 struct compound_hdr hdr = {
2771 .minorversion = clp->cl_mvops->minor_version,
2772 };
2773
2774 encode_compound_hdr(xdr, req, &hdr);
2775 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2776 encode_nops(&hdr);
2777 }
2778
2779 /*
2780 * EXCHANGE_ID request
2781 */
2782 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2783 struct xdr_stream *xdr,
2784 struct nfs41_exchange_id_args *args)
2785 {
2786 struct compound_hdr hdr = {
2787 .minorversion = args->client->cl_mvops->minor_version,
2788 };
2789
2790 encode_compound_hdr(xdr, req, &hdr);
2791 encode_exchange_id(xdr, args, &hdr);
2792 encode_nops(&hdr);
2793 }
2794
2795 /*
2796 * a CREATE_SESSION request
2797 */
2798 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2799 struct xdr_stream *xdr,
2800 struct nfs41_create_session_args *args)
2801 {
2802 struct compound_hdr hdr = {
2803 .minorversion = args->client->cl_mvops->minor_version,
2804 };
2805
2806 encode_compound_hdr(xdr, req, &hdr);
2807 encode_create_session(xdr, args, &hdr);
2808 encode_nops(&hdr);
2809 }
2810
2811 /*
2812 * a DESTROY_SESSION request
2813 */
2814 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2815 struct xdr_stream *xdr,
2816 struct nfs4_session *session)
2817 {
2818 struct compound_hdr hdr = {
2819 .minorversion = session->clp->cl_mvops->minor_version,
2820 };
2821
2822 encode_compound_hdr(xdr, req, &hdr);
2823 encode_destroy_session(xdr, session, &hdr);
2824 encode_nops(&hdr);
2825 }
2826
2827 /*
2828 * a DESTROY_CLIENTID request
2829 */
2830 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2831 struct xdr_stream *xdr,
2832 struct nfs_client *clp)
2833 {
2834 struct compound_hdr hdr = {
2835 .minorversion = clp->cl_mvops->minor_version,
2836 };
2837
2838 encode_compound_hdr(xdr, req, &hdr);
2839 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2840 encode_nops(&hdr);
2841 }
2842
2843 /*
2844 * a SEQUENCE request
2845 */
2846 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2847 struct nfs4_sequence_args *args)
2848 {
2849 struct compound_hdr hdr = {
2850 .minorversion = nfs4_xdr_minorversion(args),
2851 };
2852
2853 encode_compound_hdr(xdr, req, &hdr);
2854 encode_sequence(xdr, args, &hdr);
2855 encode_nops(&hdr);
2856 }
2857
2858 /*
2859 * a GET_LEASE_TIME request
2860 */
2861 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 struct nfs4_get_lease_time_args *args)
2864 {
2865 struct compound_hdr hdr = {
2866 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2867 };
2868 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_sequence(xdr, &args->la_seq_args, &hdr);
2872 encode_putrootfh(xdr, &hdr);
2873 encode_fsinfo(xdr, lease_bitmap, &hdr);
2874 encode_nops(&hdr);
2875 }
2876
2877 /*
2878 * a RECLAIM_COMPLETE request
2879 */
2880 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2881 struct xdr_stream *xdr,
2882 struct nfs41_reclaim_complete_args *args)
2883 {
2884 struct compound_hdr hdr = {
2885 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2886 };
2887
2888 encode_compound_hdr(xdr, req, &hdr);
2889 encode_sequence(xdr, &args->seq_args, &hdr);
2890 encode_reclaim_complete(xdr, args, &hdr);
2891 encode_nops(&hdr);
2892 }
2893
2894 /*
2895 * Encode GETDEVICELIST request
2896 */
2897 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2898 struct xdr_stream *xdr,
2899 struct nfs4_getdevicelist_args *args)
2900 {
2901 struct compound_hdr hdr = {
2902 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2903 };
2904
2905 encode_compound_hdr(xdr, req, &hdr);
2906 encode_sequence(xdr, &args->seq_args, &hdr);
2907 encode_putfh(xdr, args->fh, &hdr);
2908 encode_getdevicelist(xdr, args, &hdr);
2909 encode_nops(&hdr);
2910 }
2911
2912 /*
2913 * Encode GETDEVICEINFO request
2914 */
2915 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2916 struct xdr_stream *xdr,
2917 struct nfs4_getdeviceinfo_args *args)
2918 {
2919 struct compound_hdr hdr = {
2920 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2921 };
2922
2923 encode_compound_hdr(xdr, req, &hdr);
2924 encode_sequence(xdr, &args->seq_args, &hdr);
2925 encode_getdeviceinfo(xdr, args, &hdr);
2926
2927 /* set up reply kvec. Subtract notification bitmap max size (2)
2928 * so that notification bitmap is put in xdr_buf tail */
2929 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2930 args->pdev->pages, args->pdev->pgbase,
2931 args->pdev->pglen);
2932
2933 encode_nops(&hdr);
2934 }
2935
2936 /*
2937 * Encode LAYOUTGET request
2938 */
2939 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2940 struct xdr_stream *xdr,
2941 struct nfs4_layoutget_args *args)
2942 {
2943 struct compound_hdr hdr = {
2944 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945 };
2946
2947 encode_compound_hdr(xdr, req, &hdr);
2948 encode_sequence(xdr, &args->seq_args, &hdr);
2949 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2950 encode_layoutget(xdr, args, &hdr);
2951
2952 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2953 args->layout.pages, 0, args->layout.pglen);
2954
2955 encode_nops(&hdr);
2956 }
2957
2958 /*
2959 * Encode LAYOUTCOMMIT request
2960 */
2961 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2962 struct xdr_stream *xdr,
2963 struct nfs4_layoutcommit_args *args)
2964 {
2965 struct nfs4_layoutcommit_data *data =
2966 container_of(args, struct nfs4_layoutcommit_data, args);
2967 struct compound_hdr hdr = {
2968 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969 };
2970
2971 encode_compound_hdr(xdr, req, &hdr);
2972 encode_sequence(xdr, &args->seq_args, &hdr);
2973 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2975 encode_getfattr(xdr, args->bitmask, &hdr);
2976 encode_nops(&hdr);
2977 }
2978
2979 /*
2980 * Encode LAYOUTRETURN request
2981 */
2982 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2983 struct xdr_stream *xdr,
2984 struct nfs4_layoutreturn_args *args)
2985 {
2986 struct compound_hdr hdr = {
2987 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988 };
2989
2990 encode_compound_hdr(xdr, req, &hdr);
2991 encode_sequence(xdr, &args->seq_args, &hdr);
2992 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2993 encode_layoutreturn(xdr, args, &hdr);
2994 encode_nops(&hdr);
2995 }
2996
2997 /*
2998 * Encode SECINFO_NO_NAME request
2999 */
3000 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3001 struct xdr_stream *xdr,
3002 struct nfs41_secinfo_no_name_args *args)
3003 {
3004 struct compound_hdr hdr = {
3005 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006 };
3007
3008 encode_compound_hdr(xdr, req, &hdr);
3009 encode_sequence(xdr, &args->seq_args, &hdr);
3010 encode_putrootfh(xdr, &hdr);
3011 encode_secinfo_no_name(xdr, args, &hdr);
3012 encode_nops(&hdr);
3013 return 0;
3014 }
3015
3016 /*
3017 * Encode TEST_STATEID request
3018 */
3019 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3020 struct xdr_stream *xdr,
3021 struct nfs41_test_stateid_args *args)
3022 {
3023 struct compound_hdr hdr = {
3024 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3025 };
3026
3027 encode_compound_hdr(xdr, req, &hdr);
3028 encode_sequence(xdr, &args->seq_args, &hdr);
3029 encode_test_stateid(xdr, args, &hdr);
3030 encode_nops(&hdr);
3031 }
3032
3033 /*
3034 * Encode FREE_STATEID request
3035 */
3036 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3037 struct xdr_stream *xdr,
3038 struct nfs41_free_stateid_args *args)
3039 {
3040 struct compound_hdr hdr = {
3041 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3042 };
3043
3044 encode_compound_hdr(xdr, req, &hdr);
3045 encode_sequence(xdr, &args->seq_args, &hdr);
3046 encode_free_stateid(xdr, args, &hdr);
3047 encode_nops(&hdr);
3048 }
3049 #endif /* CONFIG_NFS_V4_1 */
3050
3051 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3052 {
3053 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3054 "Remaining buffer length is %tu words.\n",
3055 func, xdr->end - xdr->p);
3056 }
3057
3058 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3059 {
3060 __be32 *p;
3061
3062 p = xdr_inline_decode(xdr, 4);
3063 if (unlikely(!p))
3064 goto out_overflow;
3065 *len = be32_to_cpup(p);
3066 p = xdr_inline_decode(xdr, *len);
3067 if (unlikely(!p))
3068 goto out_overflow;
3069 *string = (char *)p;
3070 return 0;
3071 out_overflow:
3072 print_overflow_msg(__func__, xdr);
3073 return -EIO;
3074 }
3075
3076 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3077 {
3078 __be32 *p;
3079
3080 p = xdr_inline_decode(xdr, 8);
3081 if (unlikely(!p))
3082 goto out_overflow;
3083 hdr->status = be32_to_cpup(p++);
3084 hdr->taglen = be32_to_cpup(p);
3085
3086 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3087 if (unlikely(!p))
3088 goto out_overflow;
3089 hdr->tag = (char *)p;
3090 p += XDR_QUADLEN(hdr->taglen);
3091 hdr->nops = be32_to_cpup(p);
3092 if (unlikely(hdr->nops < 1))
3093 return nfs4_stat_to_errno(hdr->status);
3094 return 0;
3095 out_overflow:
3096 print_overflow_msg(__func__, xdr);
3097 return -EIO;
3098 }
3099
3100 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3101 int *nfs_retval)
3102 {
3103 __be32 *p;
3104 uint32_t opnum;
3105 int32_t nfserr;
3106
3107 p = xdr_inline_decode(xdr, 8);
3108 if (unlikely(!p))
3109 goto out_overflow;
3110 opnum = be32_to_cpup(p++);
3111 if (unlikely(opnum != expected))
3112 goto out_bad_operation;
3113 nfserr = be32_to_cpup(p);
3114 if (nfserr == NFS_OK)
3115 *nfs_retval = 0;
3116 else
3117 *nfs_retval = nfs4_stat_to_errno(nfserr);
3118 return true;
3119 out_bad_operation:
3120 dprintk("nfs: Server returned operation"
3121 " %d but we issued a request for %d\n",
3122 opnum, expected);
3123 *nfs_retval = -EREMOTEIO;
3124 return false;
3125 out_overflow:
3126 print_overflow_msg(__func__, xdr);
3127 *nfs_retval = -EIO;
3128 return false;
3129 }
3130
3131 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3132 {
3133 int retval;
3134
3135 __decode_op_hdr(xdr, expected, &retval);
3136 return retval;
3137 }
3138
3139 /* Dummy routine */
3140 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3141 {
3142 __be32 *p;
3143 unsigned int strlen;
3144 char *str;
3145
3146 p = xdr_inline_decode(xdr, 12);
3147 if (likely(p))
3148 return decode_opaque_inline(xdr, &strlen, &str);
3149 print_overflow_msg(__func__, xdr);
3150 return -EIO;
3151 }
3152
3153 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3154 {
3155 uint32_t bmlen;
3156 __be32 *p;
3157
3158 p = xdr_inline_decode(xdr, 4);
3159 if (unlikely(!p))
3160 goto out_overflow;
3161 bmlen = be32_to_cpup(p);
3162
3163 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3164 p = xdr_inline_decode(xdr, (bmlen << 2));
3165 if (unlikely(!p))
3166 goto out_overflow;
3167 if (bmlen > 0) {
3168 bitmap[0] = be32_to_cpup(p++);
3169 if (bmlen > 1) {
3170 bitmap[1] = be32_to_cpup(p++);
3171 if (bmlen > 2)
3172 bitmap[2] = be32_to_cpup(p);
3173 }
3174 }
3175 return 0;
3176 out_overflow:
3177 print_overflow_msg(__func__, xdr);
3178 return -EIO;
3179 }
3180
3181 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3182 {
3183 __be32 *p;
3184
3185 p = xdr_inline_decode(xdr, 4);
3186 if (unlikely(!p))
3187 goto out_overflow;
3188 *attrlen = be32_to_cpup(p);
3189 *savep = xdr_stream_pos(xdr);
3190 return 0;
3191 out_overflow:
3192 print_overflow_msg(__func__, xdr);
3193 return -EIO;
3194 }
3195
3196 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3197 {
3198 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3199 int ret;
3200 ret = decode_attr_bitmap(xdr, bitmask);
3201 if (unlikely(ret < 0))
3202 return ret;
3203 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3204 } else
3205 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3206 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3207 bitmask[0], bitmask[1], bitmask[2]);
3208 return 0;
3209 }
3210
3211 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3212 {
3213 __be32 *p;
3214 int ret = 0;
3215
3216 *type = 0;
3217 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3218 return -EIO;
3219 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3220 p = xdr_inline_decode(xdr, 4);
3221 if (unlikely(!p))
3222 goto out_overflow;
3223 *type = be32_to_cpup(p);
3224 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3225 dprintk("%s: bad type %d\n", __func__, *type);
3226 return -EIO;
3227 }
3228 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3229 ret = NFS_ATTR_FATTR_TYPE;
3230 }
3231 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3232 return ret;
3233 out_overflow:
3234 print_overflow_msg(__func__, xdr);
3235 return -EIO;
3236 }
3237
3238 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3239 uint32_t *bitmap, uint32_t *type)
3240 {
3241 __be32 *p;
3242
3243 *type = 0;
3244 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3245 return -EIO;
3246 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3247 p = xdr_inline_decode(xdr, 4);
3248 if (unlikely(!p))
3249 goto out_overflow;
3250 *type = be32_to_cpup(p);
3251 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3252 }
3253 dprintk("%s: expire type=0x%x\n", __func__, *type);
3254 return 0;
3255 out_overflow:
3256 print_overflow_msg(__func__, xdr);
3257 return -EIO;
3258 }
3259
3260 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3261 {
3262 __be32 *p;
3263 int ret = 0;
3264
3265 *change = 0;
3266 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3267 return -EIO;
3268 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3269 p = xdr_inline_decode(xdr, 8);
3270 if (unlikely(!p))
3271 goto out_overflow;
3272 xdr_decode_hyper(p, change);
3273 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3274 ret = NFS_ATTR_FATTR_CHANGE;
3275 }
3276 dprintk("%s: change attribute=%Lu\n", __func__,
3277 (unsigned long long)*change);
3278 return ret;
3279 out_overflow:
3280 print_overflow_msg(__func__, xdr);
3281 return -EIO;
3282 }
3283
3284 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3285 {
3286 __be32 *p;
3287 int ret = 0;
3288
3289 *size = 0;
3290 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3291 return -EIO;
3292 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3293 p = xdr_inline_decode(xdr, 8);
3294 if (unlikely(!p))
3295 goto out_overflow;
3296 xdr_decode_hyper(p, size);
3297 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3298 ret = NFS_ATTR_FATTR_SIZE;
3299 }
3300 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3301 return ret;
3302 out_overflow:
3303 print_overflow_msg(__func__, xdr);
3304 return -EIO;
3305 }
3306
3307 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3308 {
3309 __be32 *p;
3310
3311 *res = 0;
3312 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3313 return -EIO;
3314 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3315 p = xdr_inline_decode(xdr, 4);
3316 if (unlikely(!p))
3317 goto out_overflow;
3318 *res = be32_to_cpup(p);
3319 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3320 }
3321 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3322 return 0;
3323 out_overflow:
3324 print_overflow_msg(__func__, xdr);
3325 return -EIO;
3326 }
3327
3328 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3329 {
3330 __be32 *p;
3331
3332 *res = 0;
3333 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3334 return -EIO;
3335 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3336 p = xdr_inline_decode(xdr, 4);
3337 if (unlikely(!p))
3338 goto out_overflow;
3339 *res = be32_to_cpup(p);
3340 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3341 }
3342 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3343 return 0;
3344 out_overflow:
3345 print_overflow_msg(__func__, xdr);
3346 return -EIO;
3347 }
3348
3349 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3350 {
3351 __be32 *p;
3352 int ret = 0;
3353
3354 fsid->major = 0;
3355 fsid->minor = 0;
3356 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3357 return -EIO;
3358 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3359 p = xdr_inline_decode(xdr, 16);
3360 if (unlikely(!p))
3361 goto out_overflow;
3362 p = xdr_decode_hyper(p, &fsid->major);
3363 xdr_decode_hyper(p, &fsid->minor);
3364 bitmap[0] &= ~FATTR4_WORD0_FSID;
3365 ret = NFS_ATTR_FATTR_FSID;
3366 }
3367 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3368 (unsigned long long)fsid->major,
3369 (unsigned long long)fsid->minor);
3370 return ret;
3371 out_overflow:
3372 print_overflow_msg(__func__, xdr);
3373 return -EIO;
3374 }
3375
3376 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3377 {
3378 __be32 *p;
3379
3380 *res = 60;
3381 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3382 return -EIO;
3383 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3384 p = xdr_inline_decode(xdr, 4);
3385 if (unlikely(!p))
3386 goto out_overflow;
3387 *res = be32_to_cpup(p);
3388 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3389 }
3390 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3391 return 0;
3392 out_overflow:
3393 print_overflow_msg(__func__, xdr);
3394 return -EIO;
3395 }
3396
3397 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3398 {
3399 __be32 *p;
3400
3401 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3402 return -EIO;
3403 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3404 p = xdr_inline_decode(xdr, 4);
3405 if (unlikely(!p))
3406 goto out_overflow;
3407 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3408 *res = -be32_to_cpup(p);
3409 }
3410 return 0;
3411 out_overflow:
3412 print_overflow_msg(__func__, xdr);
3413 return -EIO;
3414 }
3415
3416 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3417 {
3418 __be32 *p;
3419 int len;
3420
3421 if (fh != NULL)
3422 memset(fh, 0, sizeof(*fh));
3423
3424 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3425 return -EIO;
3426 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3427 p = xdr_inline_decode(xdr, 4);
3428 if (unlikely(!p))
3429 goto out_overflow;
3430 len = be32_to_cpup(p);
3431 if (len > NFS4_FHSIZE)
3432 return -EIO;
3433 p = xdr_inline_decode(xdr, len);
3434 if (unlikely(!p))
3435 goto out_overflow;
3436 if (fh != NULL) {
3437 memcpy(fh->data, p, len);
3438 fh->size = len;
3439 }
3440 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3441 }
3442 return 0;
3443 out_overflow:
3444 print_overflow_msg(__func__, xdr);
3445 return -EIO;
3446 }
3447
3448 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3449 {
3450 __be32 *p;
3451
3452 *res = 0;
3453 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3454 return -EIO;
3455 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3456 p = xdr_inline_decode(xdr, 4);
3457 if (unlikely(!p))
3458 goto out_overflow;
3459 *res = be32_to_cpup(p);
3460 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3461 }
3462 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3463 return 0;
3464 out_overflow:
3465 print_overflow_msg(__func__, xdr);
3466 return -EIO;
3467 }
3468
3469 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3470 {
3471 __be32 *p;
3472 int ret = 0;
3473
3474 *fileid = 0;
3475 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3476 return -EIO;
3477 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3478 p = xdr_inline_decode(xdr, 8);
3479 if (unlikely(!p))
3480 goto out_overflow;
3481 xdr_decode_hyper(p, fileid);
3482 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3483 ret = NFS_ATTR_FATTR_FILEID;
3484 }
3485 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3486 return ret;
3487 out_overflow:
3488 print_overflow_msg(__func__, xdr);
3489 return -EIO;
3490 }
3491
3492 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3493 {
3494 __be32 *p;
3495 int ret = 0;
3496
3497 *fileid = 0;
3498 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3499 return -EIO;
3500 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3501 p = xdr_inline_decode(xdr, 8);
3502 if (unlikely(!p))
3503 goto out_overflow;
3504 xdr_decode_hyper(p, fileid);
3505 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3506 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3507 }
3508 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3509 return ret;
3510 out_overflow:
3511 print_overflow_msg(__func__, xdr);
3512 return -EIO;
3513 }
3514
3515 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3516 {
3517 __be32 *p;
3518 int status = 0;
3519
3520 *res = 0;
3521 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3522 return -EIO;
3523 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3524 p = xdr_inline_decode(xdr, 8);
3525 if (unlikely(!p))
3526 goto out_overflow;
3527 xdr_decode_hyper(p, res);
3528 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3529 }
3530 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3531 return status;
3532 out_overflow:
3533 print_overflow_msg(__func__, xdr);
3534 return -EIO;
3535 }
3536
3537 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3538 {
3539 __be32 *p;
3540 int status = 0;
3541
3542 *res = 0;
3543 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3544 return -EIO;
3545 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3546 p = xdr_inline_decode(xdr, 8);
3547 if (unlikely(!p))
3548 goto out_overflow;
3549 xdr_decode_hyper(p, res);
3550 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3551 }
3552 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3553 return status;
3554 out_overflow:
3555 print_overflow_msg(__func__, xdr);
3556 return -EIO;
3557 }
3558
3559 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3560 {
3561 __be32 *p;
3562 int status = 0;
3563
3564 *res = 0;
3565 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3566 return -EIO;
3567 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3568 p = xdr_inline_decode(xdr, 8);
3569 if (unlikely(!p))
3570 goto out_overflow;
3571 xdr_decode_hyper(p, res);
3572 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3573 }
3574 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3575 return status;
3576 out_overflow:
3577 print_overflow_msg(__func__, xdr);
3578 return -EIO;
3579 }
3580
3581 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3582 {
3583 u32 n;
3584 __be32 *p;
3585 int status = 0;
3586
3587 p = xdr_inline_decode(xdr, 4);
3588 if (unlikely(!p))
3589 goto out_overflow;
3590 n = be32_to_cpup(p);
3591 if (n == 0)
3592 goto root_path;
3593 dprintk("pathname4: ");
3594 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3595 dprintk("cannot parse %d components in path\n", n);
3596 goto out_eio;
3597 }
3598 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3599 struct nfs4_string *component = &path->components[path->ncomponents];
3600 status = decode_opaque_inline(xdr, &component->len, &component->data);
3601 if (unlikely(status != 0))
3602 goto out_eio;
3603 ifdebug (XDR)
3604 pr_cont("%s%.*s ",
3605 (path->ncomponents != n ? "/ " : ""),
3606 component->len, component->data);
3607 }
3608 out:
3609 return status;
3610 root_path:
3611 /* a root pathname is sent as a zero component4 */
3612 path->ncomponents = 1;
3613 path->components[0].len=0;
3614 path->components[0].data=NULL;
3615 dprintk("pathname4: /\n");
3616 goto out;
3617 out_eio:
3618 dprintk(" status %d", status);
3619 status = -EIO;
3620 goto out;
3621 out_overflow:
3622 print_overflow_msg(__func__, xdr);
3623 return -EIO;
3624 }
3625
3626 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3627 {
3628 int n;
3629 __be32 *p;
3630 int status = -EIO;
3631
3632 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3633 goto out;
3634 status = 0;
3635 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3636 goto out;
3637 status = -EIO;
3638 /* Ignore borken servers that return unrequested attrs */
3639 if (unlikely(res == NULL))
3640 goto out;
3641 dprintk("%s: fsroot:\n", __func__);
3642 status = decode_pathname(xdr, &res->fs_path);
3643 if (unlikely(status != 0))
3644 goto out;
3645 p = xdr_inline_decode(xdr, 4);
3646 if (unlikely(!p))
3647 goto out_overflow;
3648 n = be32_to_cpup(p);
3649 if (n <= 0)
3650 goto out_eio;
3651 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3652 u32 m;
3653 struct nfs4_fs_location *loc;
3654
3655 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3656 break;
3657 loc = &res->locations[res->nlocations];
3658 p = xdr_inline_decode(xdr, 4);
3659 if (unlikely(!p))
3660 goto out_overflow;
3661 m = be32_to_cpup(p);
3662
3663 dprintk("%s: servers:\n", __func__);
3664 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3665 struct nfs4_string *server;
3666
3667 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3668 unsigned int i;
3669 dprintk("%s: using first %u of %u servers "
3670 "returned for location %u\n",
3671 __func__,
3672 NFS4_FS_LOCATION_MAXSERVERS,
3673 m, res->nlocations);
3674 for (i = loc->nservers; i < m; i++) {
3675 unsigned int len;
3676 char *data;
3677 status = decode_opaque_inline(xdr, &len, &data);
3678 if (unlikely(status != 0))
3679 goto out_eio;
3680 }
3681 break;
3682 }
3683 server = &loc->servers[loc->nservers];
3684 status = decode_opaque_inline(xdr, &server->len, &server->data);
3685 if (unlikely(status != 0))
3686 goto out_eio;
3687 dprintk("%s ", server->data);
3688 }
3689 status = decode_pathname(xdr, &loc->rootpath);
3690 if (unlikely(status != 0))
3691 goto out_eio;
3692 }
3693 if (res->nlocations != 0)
3694 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3695 out:
3696 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3697 return status;
3698 out_overflow:
3699 print_overflow_msg(__func__, xdr);
3700 out_eio:
3701 status = -EIO;
3702 goto out;
3703 }
3704
3705 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3706 {
3707 __be32 *p;
3708 int status = 0;
3709
3710 *res = 0;
3711 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3712 return -EIO;
3713 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3714 p = xdr_inline_decode(xdr, 8);
3715 if (unlikely(!p))
3716 goto out_overflow;
3717 xdr_decode_hyper(p, res);
3718 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3719 }
3720 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3721 return status;
3722 out_overflow:
3723 print_overflow_msg(__func__, xdr);
3724 return -EIO;
3725 }
3726
3727 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3728 {
3729 __be32 *p;
3730 int status = 0;
3731
3732 *maxlink = 1;
3733 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3734 return -EIO;
3735 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3736 p = xdr_inline_decode(xdr, 4);
3737 if (unlikely(!p))
3738 goto out_overflow;
3739 *maxlink = be32_to_cpup(p);
3740 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3741 }
3742 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3743 return status;
3744 out_overflow:
3745 print_overflow_msg(__func__, xdr);
3746 return -EIO;
3747 }
3748
3749 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3750 {
3751 __be32 *p;
3752 int status = 0;
3753
3754 *maxname = 1024;
3755 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3756 return -EIO;
3757 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3758 p = xdr_inline_decode(xdr, 4);
3759 if (unlikely(!p))
3760 goto out_overflow;
3761 *maxname = be32_to_cpup(p);
3762 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3763 }
3764 dprintk("%s: maxname=%u\n", __func__, *maxname);
3765 return status;
3766 out_overflow:
3767 print_overflow_msg(__func__, xdr);
3768 return -EIO;
3769 }
3770
3771 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3772 {
3773 __be32 *p;
3774 int status = 0;
3775
3776 *res = 1024;
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3778 return -EIO;
3779 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3780 uint64_t maxread;
3781 p = xdr_inline_decode(xdr, 8);
3782 if (unlikely(!p))
3783 goto out_overflow;
3784 xdr_decode_hyper(p, &maxread);
3785 if (maxread > 0x7FFFFFFF)
3786 maxread = 0x7FFFFFFF;
3787 *res = (uint32_t)maxread;
3788 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3789 }
3790 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3791 return status;
3792 out_overflow:
3793 print_overflow_msg(__func__, xdr);
3794 return -EIO;
3795 }
3796
3797 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3798 {
3799 __be32 *p;
3800 int status = 0;
3801
3802 *res = 1024;
3803 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3804 return -EIO;
3805 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3806 uint64_t maxwrite;
3807 p = xdr_inline_decode(xdr, 8);
3808 if (unlikely(!p))
3809 goto out_overflow;
3810 xdr_decode_hyper(p, &maxwrite);
3811 if (maxwrite > 0x7FFFFFFF)
3812 maxwrite = 0x7FFFFFFF;
3813 *res = (uint32_t)maxwrite;
3814 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3815 }
3816 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3817 return status;
3818 out_overflow:
3819 print_overflow_msg(__func__, xdr);
3820 return -EIO;
3821 }
3822
3823 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3824 {
3825 uint32_t tmp;
3826 __be32 *p;
3827 int ret = 0;
3828
3829 *mode = 0;
3830 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3831 return -EIO;
3832 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3833 p = xdr_inline_decode(xdr, 4);
3834 if (unlikely(!p))
3835 goto out_overflow;
3836 tmp = be32_to_cpup(p);
3837 *mode = tmp & ~S_IFMT;
3838 bitmap[1] &= ~FATTR4_WORD1_MODE;
3839 ret = NFS_ATTR_FATTR_MODE;
3840 }
3841 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3842 return ret;
3843 out_overflow:
3844 print_overflow_msg(__func__, xdr);
3845 return -EIO;
3846 }
3847
3848 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3849 {
3850 __be32 *p;
3851 int ret = 0;
3852
3853 *nlink = 1;
3854 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3855 return -EIO;
3856 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3857 p = xdr_inline_decode(xdr, 4);
3858 if (unlikely(!p))
3859 goto out_overflow;
3860 *nlink = be32_to_cpup(p);
3861 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3862 ret = NFS_ATTR_FATTR_NLINK;
3863 }
3864 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3865 return ret;
3866 out_overflow:
3867 print_overflow_msg(__func__, xdr);
3868 return -EIO;
3869 }
3870
3871 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3872 const struct nfs_server *server, kuid_t *uid,
3873 struct nfs4_string *owner_name)
3874 {
3875 uint32_t len;
3876 __be32 *p;
3877 int ret = 0;
3878
3879 *uid = make_kuid(&init_user_ns, -2);
3880 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3881 return -EIO;
3882 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3883 p = xdr_inline_decode(xdr, 4);
3884 if (unlikely(!p))
3885 goto out_overflow;
3886 len = be32_to_cpup(p);
3887 p = xdr_inline_decode(xdr, len);
3888 if (unlikely(!p))
3889 goto out_overflow;
3890 if (owner_name != NULL) {
3891 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3892 if (owner_name->data != NULL) {
3893 owner_name->len = len;
3894 ret = NFS_ATTR_FATTR_OWNER_NAME;
3895 }
3896 } else if (len < XDR_MAX_NETOBJ) {
3897 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3898 ret = NFS_ATTR_FATTR_OWNER;
3899 else
3900 dprintk("%s: nfs_map_name_to_uid failed!\n",
3901 __func__);
3902 } else
3903 dprintk("%s: name too long (%u)!\n",
3904 __func__, len);
3905 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3906 }
3907 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3908 return ret;
3909 out_overflow:
3910 print_overflow_msg(__func__, xdr);
3911 return -EIO;
3912 }
3913
3914 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3915 const struct nfs_server *server, kgid_t *gid,
3916 struct nfs4_string *group_name)
3917 {
3918 uint32_t len;
3919 __be32 *p;
3920 int ret = 0;
3921
3922 *gid = make_kgid(&init_user_ns, -2);
3923 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3924 return -EIO;
3925 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3926 p = xdr_inline_decode(xdr, 4);
3927 if (unlikely(!p))
3928 goto out_overflow;
3929 len = be32_to_cpup(p);
3930 p = xdr_inline_decode(xdr, len);
3931 if (unlikely(!p))
3932 goto out_overflow;
3933 if (group_name != NULL) {
3934 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3935 if (group_name->data != NULL) {
3936 group_name->len = len;
3937 ret = NFS_ATTR_FATTR_GROUP_NAME;
3938 }
3939 } else if (len < XDR_MAX_NETOBJ) {
3940 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3941 ret = NFS_ATTR_FATTR_GROUP;
3942 else
3943 dprintk("%s: nfs_map_group_to_gid failed!\n",
3944 __func__);
3945 } else
3946 dprintk("%s: name too long (%u)!\n",
3947 __func__, len);
3948 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3949 }
3950 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951 return ret;
3952 out_overflow:
3953 print_overflow_msg(__func__, xdr);
3954 return -EIO;
3955 }
3956
3957 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3958 {
3959 uint32_t major = 0, minor = 0;
3960 __be32 *p;
3961 int ret = 0;
3962
3963 *rdev = MKDEV(0,0);
3964 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3965 return -EIO;
3966 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3967 dev_t tmp;
3968
3969 p = xdr_inline_decode(xdr, 8);
3970 if (unlikely(!p))
3971 goto out_overflow;
3972 major = be32_to_cpup(p++);
3973 minor = be32_to_cpup(p);
3974 tmp = MKDEV(major, minor);
3975 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3976 *rdev = tmp;
3977 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3978 ret = NFS_ATTR_FATTR_RDEV;
3979 }
3980 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3981 return ret;
3982 out_overflow:
3983 print_overflow_msg(__func__, xdr);
3984 return -EIO;
3985 }
3986
3987 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3988 {
3989 __be32 *p;
3990 int status = 0;
3991
3992 *res = 0;
3993 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3994 return -EIO;
3995 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3996 p = xdr_inline_decode(xdr, 8);
3997 if (unlikely(!p))
3998 goto out_overflow;
3999 xdr_decode_hyper(p, res);
4000 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4001 }
4002 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4003 return status;
4004 out_overflow:
4005 print_overflow_msg(__func__, xdr);
4006 return -EIO;
4007 }
4008
4009 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011 __be32 *p;
4012 int status = 0;
4013
4014 *res = 0;
4015 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4016 return -EIO;
4017 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4018 p = xdr_inline_decode(xdr, 8);
4019 if (unlikely(!p))
4020 goto out_overflow;
4021 xdr_decode_hyper(p, res);
4022 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4023 }
4024 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4025 return status;
4026 out_overflow:
4027 print_overflow_msg(__func__, xdr);
4028 return -EIO;
4029 }
4030
4031 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032 {
4033 __be32 *p;
4034 int status = 0;
4035
4036 *res = 0;
4037 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4038 return -EIO;
4039 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4040 p = xdr_inline_decode(xdr, 8);
4041 if (unlikely(!p))
4042 goto out_overflow;
4043 xdr_decode_hyper(p, res);
4044 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4045 }
4046 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4047 return status;
4048 out_overflow:
4049 print_overflow_msg(__func__, xdr);
4050 return -EIO;
4051 }
4052
4053 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4054 {
4055 __be32 *p;
4056 int ret = 0;
4057
4058 *used = 0;
4059 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4060 return -EIO;
4061 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4062 p = xdr_inline_decode(xdr, 8);
4063 if (unlikely(!p))
4064 goto out_overflow;
4065 xdr_decode_hyper(p, used);
4066 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4067 ret = NFS_ATTR_FATTR_SPACE_USED;
4068 }
4069 dprintk("%s: space used=%Lu\n", __func__,
4070 (unsigned long long)*used);
4071 return ret;
4072 out_overflow:
4073 print_overflow_msg(__func__, xdr);
4074 return -EIO;
4075 }
4076
4077 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4078 {
4079 __be32 *p;
4080 uint64_t sec;
4081 uint32_t nsec;
4082
4083 p = xdr_inline_decode(xdr, 12);
4084 if (unlikely(!p))
4085 goto out_overflow;
4086 p = xdr_decode_hyper(p, &sec);
4087 nsec = be32_to_cpup(p);
4088 time->tv_sec = (time_t)sec;
4089 time->tv_nsec = (long)nsec;
4090 return 0;
4091 out_overflow:
4092 print_overflow_msg(__func__, xdr);
4093 return -EIO;
4094 }
4095
4096 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097 {
4098 int status = 0;
4099
4100 time->tv_sec = 0;
4101 time->tv_nsec = 0;
4102 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4103 return -EIO;
4104 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4105 status = decode_attr_time(xdr, time);
4106 if (status == 0)
4107 status = NFS_ATTR_FATTR_ATIME;
4108 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4109 }
4110 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4111 return status;
4112 }
4113
4114 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4115 {
4116 int status = 0;
4117
4118 time->tv_sec = 0;
4119 time->tv_nsec = 0;
4120 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4121 return -EIO;
4122 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4123 status = decode_attr_time(xdr, time);
4124 if (status == 0)
4125 status = NFS_ATTR_FATTR_CTIME;
4126 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4127 }
4128 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4129 return status;
4130 }
4131
4132 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4133 struct timespec *time)
4134 {
4135 int status = 0;
4136
4137 time->tv_sec = 0;
4138 time->tv_nsec = 0;
4139 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4140 return -EIO;
4141 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4142 status = decode_attr_time(xdr, time);
4143 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4144 }
4145 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4146 (long)time->tv_nsec);
4147 return status;
4148 }
4149
4150 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4151 struct nfs4_label *label)
4152 {
4153 uint32_t pi = 0;
4154 uint32_t lfs = 0;
4155 __u32 len;
4156 __be32 *p;
4157 int status = 0;
4158
4159 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4160 return -EIO;
4161 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4162 p = xdr_inline_decode(xdr, 4);
4163 if (unlikely(!p))
4164 goto out_overflow;
4165 lfs = be32_to_cpup(p++);
4166 p = xdr_inline_decode(xdr, 4);
4167 if (unlikely(!p))
4168 goto out_overflow;
4169 pi = be32_to_cpup(p++);
4170 p = xdr_inline_decode(xdr, 4);
4171 if (unlikely(!p))
4172 goto out_overflow;
4173 len = be32_to_cpup(p++);
4174 p = xdr_inline_decode(xdr, len);
4175 if (unlikely(!p))
4176 goto out_overflow;
4177 if (len < NFS4_MAXLABELLEN) {
4178 if (label) {
4179 memcpy(label->label, p, len);
4180 label->len = len;
4181 label->pi = pi;
4182 label->lfs = lfs;
4183 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4184 }
4185 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4186 } else
4187 printk(KERN_WARNING "%s: label too long (%u)!\n",
4188 __func__, len);
4189 }
4190 if (label && label->label)
4191 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4192 (char *)label->label, label->len, label->pi, label->lfs);
4193 return status;
4194
4195 out_overflow:
4196 print_overflow_msg(__func__, xdr);
4197 return -EIO;
4198 }
4199
4200 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4201 {
4202 int status = 0;
4203
4204 time->tv_sec = 0;
4205 time->tv_nsec = 0;
4206 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4207 return -EIO;
4208 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4209 status = decode_attr_time(xdr, time);
4210 if (status == 0)
4211 status = NFS_ATTR_FATTR_MTIME;
4212 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4213 }
4214 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4215 return status;
4216 }
4217
4218 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4219 {
4220 unsigned int attrwords = XDR_QUADLEN(attrlen);
4221 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4222
4223 if (unlikely(attrwords != nwords)) {
4224 dprintk("%s: server returned incorrect attribute length: "
4225 "%u %c %u\n",
4226 __func__,
4227 attrwords << 2,
4228 (attrwords < nwords) ? '<' : '>',
4229 nwords << 2);
4230 return -EIO;
4231 }
4232 return 0;
4233 }
4234
4235 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4236 {
4237 __be32 *p;
4238
4239 p = xdr_inline_decode(xdr, 20);
4240 if (unlikely(!p))
4241 goto out_overflow;
4242 cinfo->atomic = be32_to_cpup(p++);
4243 p = xdr_decode_hyper(p, &cinfo->before);
4244 xdr_decode_hyper(p, &cinfo->after);
4245 return 0;
4246 out_overflow:
4247 print_overflow_msg(__func__, xdr);
4248 return -EIO;
4249 }
4250
4251 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4252 {
4253 __be32 *p;
4254 uint32_t supp, acc;
4255 int status;
4256
4257 status = decode_op_hdr(xdr, OP_ACCESS);
4258 if (status)
4259 return status;
4260 p = xdr_inline_decode(xdr, 8);
4261 if (unlikely(!p))
4262 goto out_overflow;
4263 supp = be32_to_cpup(p++);
4264 acc = be32_to_cpup(p);
4265 *supported = supp;
4266 *access = acc;
4267 return 0;
4268 out_overflow:
4269 print_overflow_msg(__func__, xdr);
4270 return -EIO;
4271 }
4272
4273 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4274 {
4275 __be32 *p;
4276
4277 p = xdr_inline_decode(xdr, len);
4278 if (likely(p)) {
4279 memcpy(buf, p, len);
4280 return 0;
4281 }
4282 print_overflow_msg(__func__, xdr);
4283 return -EIO;
4284 }
4285
4286 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4287 {
4288 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4289 }
4290
4291 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4292 {
4293 int status;
4294
4295 status = decode_op_hdr(xdr, OP_CLOSE);
4296 if (status != -EIO)
4297 nfs_increment_open_seqid(status, res->seqid);
4298 if (!status)
4299 status = decode_stateid(xdr, &res->stateid);
4300 return status;
4301 }
4302
4303 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4304 {
4305 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4306 }
4307
4308 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4309 {
4310 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4314 {
4315 int status;
4316
4317 status = decode_op_hdr(xdr, OP_COMMIT);
4318 if (!status)
4319 status = decode_write_verifier(xdr, &res->verf->verifier);
4320 return status;
4321 }
4322
4323 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4324 {
4325 __be32 *p;
4326 uint32_t bmlen;
4327 int status;
4328
4329 status = decode_op_hdr(xdr, OP_CREATE);
4330 if (status)
4331 return status;
4332 if ((status = decode_change_info(xdr, cinfo)))
4333 return status;
4334 p = xdr_inline_decode(xdr, 4);
4335 if (unlikely(!p))
4336 goto out_overflow;
4337 bmlen = be32_to_cpup(p);
4338 p = xdr_inline_decode(xdr, bmlen << 2);
4339 if (likely(p))
4340 return 0;
4341 out_overflow:
4342 print_overflow_msg(__func__, xdr);
4343 return -EIO;
4344 }
4345
4346 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4347 {
4348 unsigned int savep;
4349 uint32_t attrlen, bitmap[3] = {0};
4350 int status;
4351
4352 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4353 goto xdr_error;
4354 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4361 &res->fh_expire_type)) != 0)
4362 goto xdr_error;
4363 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4366 goto xdr_error;
4367 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4368 goto xdr_error;
4369 status = verify_attr_len(xdr, savep, attrlen);
4370 xdr_error:
4371 dprintk("%s: xdr returned %d!\n", __func__, -status);
4372 return status;
4373 }
4374
4375 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4376 {
4377 unsigned int savep;
4378 uint32_t attrlen, bitmap[3] = {0};
4379 int status;
4380
4381 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4382 goto xdr_error;
4383 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4384 goto xdr_error;
4385 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4386 goto xdr_error;
4387
4388 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4389 goto xdr_error;
4390 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4391 goto xdr_error;
4392 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4393 goto xdr_error;
4394 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4395 goto xdr_error;
4396 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4397 goto xdr_error;
4398 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4399 goto xdr_error;
4400
4401 status = verify_attr_len(xdr, savep, attrlen);
4402 xdr_error:
4403 dprintk("%s: xdr returned %d!\n", __func__, -status);
4404 return status;
4405 }
4406
4407 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4408 {
4409 unsigned int savep;
4410 uint32_t attrlen, bitmap[3] = {0};
4411 int status;
4412
4413 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4414 goto xdr_error;
4415 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4416 goto xdr_error;
4417 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4418 goto xdr_error;
4419
4420 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4421 goto xdr_error;
4422 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4423 goto xdr_error;
4424
4425 status = verify_attr_len(xdr, savep, attrlen);
4426 xdr_error:
4427 dprintk("%s: xdr returned %d!\n", __func__, -status);
4428 return status;
4429 }
4430
4431 static int decode_threshold_hint(struct xdr_stream *xdr,
4432 uint32_t *bitmap,
4433 uint64_t *res,
4434 uint32_t hint_bit)
4435 {
4436 __be32 *p;
4437
4438 *res = 0;
4439 if (likely(bitmap[0] & hint_bit)) {
4440 p = xdr_inline_decode(xdr, 8);
4441 if (unlikely(!p))
4442 goto out_overflow;
4443 xdr_decode_hyper(p, res);
4444 }
4445 return 0;
4446 out_overflow:
4447 print_overflow_msg(__func__, xdr);
4448 return -EIO;
4449 }
4450
4451 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4452 struct nfs4_threshold *res)
4453 {
4454 __be32 *p;
4455 unsigned int savep;
4456 uint32_t bitmap[3] = {0,}, attrlen;
4457 int status;
4458
4459 /* layout type */
4460 p = xdr_inline_decode(xdr, 4);
4461 if (unlikely(!p)) {
4462 print_overflow_msg(__func__, xdr);
4463 return -EIO;
4464 }
4465 res->l_type = be32_to_cpup(p);
4466
4467 /* thi_hintset bitmap */
4468 status = decode_attr_bitmap(xdr, bitmap);
4469 if (status < 0)
4470 goto xdr_error;
4471
4472 /* thi_hintlist length */
4473 status = decode_attr_length(xdr, &attrlen, &savep);
4474 if (status < 0)
4475 goto xdr_error;
4476 /* thi_hintlist */
4477 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4478 if (status < 0)
4479 goto xdr_error;
4480 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4481 if (status < 0)
4482 goto xdr_error;
4483 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4484 THRESHOLD_RD_IO);
4485 if (status < 0)
4486 goto xdr_error;
4487 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4488 THRESHOLD_WR_IO);
4489 if (status < 0)
4490 goto xdr_error;
4491
4492 status = verify_attr_len(xdr, savep, attrlen);
4493 res->bm = bitmap[0];
4494
4495 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4496 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4497 res->wr_io_sz);
4498 xdr_error:
4499 dprintk("%s ret=%d!\n", __func__, status);
4500 return status;
4501 }
4502
4503 /*
4504 * Thresholds on pNFS direct I/O vrs MDS I/O
4505 */
4506 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4507 uint32_t *bitmap,
4508 struct nfs4_threshold *res)
4509 {
4510 __be32 *p;
4511 int status = 0;
4512 uint32_t num;
4513
4514 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4515 return -EIO;
4516 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4517 /* Did the server return an unrequested attribute? */
4518 if (unlikely(res == NULL))
4519 return -EREMOTEIO;
4520 p = xdr_inline_decode(xdr, 4);
4521 if (unlikely(!p))
4522 goto out_overflow;
4523 num = be32_to_cpup(p);
4524 if (num == 0)
4525 return 0;
4526 if (num > 1)
4527 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4528 "drivers per filesystem not supported\n",
4529 __func__);
4530
4531 status = decode_first_threshold_item4(xdr, res);
4532 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4533 }
4534 return status;
4535 out_overflow:
4536 print_overflow_msg(__func__, xdr);
4537 return -EIO;
4538 }
4539
4540 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4541 struct nfs_fattr *fattr, struct nfs_fh *fh,
4542 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4543 const struct nfs_server *server)
4544 {
4545 int status;
4546 umode_t fmode = 0;
4547 uint32_t type;
4548 int32_t err;
4549
4550 status = decode_attr_type(xdr, bitmap, &type);
4551 if (status < 0)
4552 goto xdr_error;
4553 fattr->mode = 0;
4554 if (status != 0) {
4555 fattr->mode |= nfs_type2fmt[type];
4556 fattr->valid |= status;
4557 }
4558
4559 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4560 if (status < 0)
4561 goto xdr_error;
4562 fattr->valid |= status;
4563
4564 status = decode_attr_size(xdr, bitmap, &fattr->size);
4565 if (status < 0)
4566 goto xdr_error;
4567 fattr->valid |= status;
4568
4569 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4570 if (status < 0)
4571 goto xdr_error;
4572 fattr->valid |= status;
4573
4574 err = 0;
4575 status = decode_attr_error(xdr, bitmap, &err);
4576 if (status < 0)
4577 goto xdr_error;
4578
4579 status = decode_attr_filehandle(xdr, bitmap, fh);
4580 if (status < 0)
4581 goto xdr_error;
4582
4583 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4584 if (status < 0)
4585 goto xdr_error;
4586 fattr->valid |= status;
4587
4588 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4589 if (status < 0)
4590 goto xdr_error;
4591 fattr->valid |= status;
4592
4593 status = decode_attr_mode(xdr, bitmap, &fmode);
4594 if (status < 0)
4595 goto xdr_error;
4596 if (status != 0) {
4597 fattr->mode |= fmode;
4598 fattr->valid |= status;
4599 }
4600
4601 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4602 if (status < 0)
4603 goto xdr_error;
4604 fattr->valid |= status;
4605
4606 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4607 if (status < 0)
4608 goto xdr_error;
4609 fattr->valid |= status;
4610
4611 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4612 if (status < 0)
4613 goto xdr_error;
4614 fattr->valid |= status;
4615
4616 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4617 if (status < 0)
4618 goto xdr_error;
4619 fattr->valid |= status;
4620
4621 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4622 if (status < 0)
4623 goto xdr_error;
4624 fattr->valid |= status;
4625
4626 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4627 if (status < 0)
4628 goto xdr_error;
4629 fattr->valid |= status;
4630
4631 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4632 if (status < 0)
4633 goto xdr_error;
4634 fattr->valid |= status;
4635
4636 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4637 if (status < 0)
4638 goto xdr_error;
4639 fattr->valid |= status;
4640
4641 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4642 if (status < 0)
4643 goto xdr_error;
4644 fattr->valid |= status;
4645
4646 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4647 if (status < 0)
4648 goto xdr_error;
4649
4650 if (label) {
4651 status = decode_attr_security_label(xdr, bitmap, label);
4652 if (status < 0)
4653 goto xdr_error;
4654 fattr->valid |= status;
4655 }
4656
4657 xdr_error:
4658 dprintk("%s: xdr returned %d\n", __func__, -status);
4659 return status;
4660 }
4661
4662 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4663 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4664 struct nfs4_label *label, const struct nfs_server *server)
4665 {
4666 unsigned int savep;
4667 uint32_t attrlen,
4668 bitmap[3] = {0};
4669 int status;
4670
4671 status = decode_op_hdr(xdr, OP_GETATTR);
4672 if (status < 0)
4673 goto xdr_error;
4674
4675 status = decode_attr_bitmap(xdr, bitmap);
4676 if (status < 0)
4677 goto xdr_error;
4678
4679 status = decode_attr_length(xdr, &attrlen, &savep);
4680 if (status < 0)
4681 goto xdr_error;
4682
4683 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4684 label, server);
4685 if (status < 0)
4686 goto xdr_error;
4687
4688 status = verify_attr_len(xdr, savep, attrlen);
4689 xdr_error:
4690 dprintk("%s: xdr returned %d\n", __func__, -status);
4691 return status;
4692 }
4693
4694 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4695 struct nfs4_label *label, const struct nfs_server *server)
4696 {
4697 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4698 }
4699
4700 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4701 const struct nfs_server *server)
4702 {
4703 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4704 }
4705
4706 /*
4707 * Decode potentially multiple layout types. Currently we only support
4708 * one layout driver per file system.
4709 */
4710 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4711 uint32_t *layouttype)
4712 {
4713 __be32 *p;
4714 int num;
4715
4716 p = xdr_inline_decode(xdr, 4);
4717 if (unlikely(!p))
4718 goto out_overflow;
4719 num = be32_to_cpup(p);
4720
4721 /* pNFS is not supported by the underlying file system */
4722 if (num == 0) {
4723 *layouttype = 0;
4724 return 0;
4725 }
4726 if (num > 1)
4727 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4728 "drivers per filesystem not supported\n", __func__);
4729
4730 /* Decode and set first layout type, move xdr->p past unused types */
4731 p = xdr_inline_decode(xdr, num * 4);
4732 if (unlikely(!p))
4733 goto out_overflow;
4734 *layouttype = be32_to_cpup(p);
4735 return 0;
4736 out_overflow:
4737 print_overflow_msg(__func__, xdr);
4738 return -EIO;
4739 }
4740
4741 /*
4742 * The type of file system exported.
4743 * Note we must ensure that layouttype is set in any non-error case.
4744 */
4745 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4746 uint32_t *layouttype)
4747 {
4748 int status = 0;
4749
4750 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4751 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4752 return -EIO;
4753 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4754 status = decode_first_pnfs_layout_type(xdr, layouttype);
4755 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4756 } else
4757 *layouttype = 0;
4758 return status;
4759 }
4760
4761 /*
4762 * The prefered block size for layout directed io
4763 */
4764 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4765 uint32_t *res)
4766 {
4767 __be32 *p;
4768
4769 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4770 *res = 0;
4771 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4772 p = xdr_inline_decode(xdr, 4);
4773 if (unlikely(!p)) {
4774 print_overflow_msg(__func__, xdr);
4775 return -EIO;
4776 }
4777 *res = be32_to_cpup(p);
4778 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4779 }
4780 return 0;
4781 }
4782
4783 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4784 {
4785 unsigned int savep;
4786 uint32_t attrlen, bitmap[3];
4787 int status;
4788
4789 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4790 goto xdr_error;
4791 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4792 goto xdr_error;
4793 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4794 goto xdr_error;
4795
4796 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4797
4798 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4799 goto xdr_error;
4800 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4801 goto xdr_error;
4802 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4803 goto xdr_error;
4804 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4805 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4806 goto xdr_error;
4807 fsinfo->wtpref = fsinfo->wtmax;
4808 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4809 if (status != 0)
4810 goto xdr_error;
4811 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4812 if (status != 0)
4813 goto xdr_error;
4814 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4815 if (status)
4816 goto xdr_error;
4817
4818 status = verify_attr_len(xdr, savep, attrlen);
4819 xdr_error:
4820 dprintk("%s: xdr returned %d!\n", __func__, -status);
4821 return status;
4822 }
4823
4824 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4825 {
4826 __be32 *p;
4827 uint32_t len;
4828 int status;
4829
4830 /* Zero handle first to allow comparisons */
4831 memset(fh, 0, sizeof(*fh));
4832
4833 status = decode_op_hdr(xdr, OP_GETFH);
4834 if (status)
4835 return status;
4836
4837 p = xdr_inline_decode(xdr, 4);
4838 if (unlikely(!p))
4839 goto out_overflow;
4840 len = be32_to_cpup(p);
4841 if (len > NFS4_FHSIZE)
4842 return -EIO;
4843 fh->size = len;
4844 p = xdr_inline_decode(xdr, len);
4845 if (unlikely(!p))
4846 goto out_overflow;
4847 memcpy(fh->data, p, len);
4848 return 0;
4849 out_overflow:
4850 print_overflow_msg(__func__, xdr);
4851 return -EIO;
4852 }
4853
4854 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4855 {
4856 int status;
4857
4858 status = decode_op_hdr(xdr, OP_LINK);
4859 if (status)
4860 return status;
4861 return decode_change_info(xdr, cinfo);
4862 }
4863
4864 /*
4865 * We create the owner, so we know a proper owner.id length is 4.
4866 */
4867 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4868 {
4869 uint64_t offset, length, clientid;
4870 __be32 *p;
4871 uint32_t namelen, type;
4872
4873 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4874 if (unlikely(!p))
4875 goto out_overflow;
4876 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4877 p = xdr_decode_hyper(p, &length);
4878 type = be32_to_cpup(p++); /* 4 byte read */
4879 if (fl != NULL) { /* manipulate file lock */
4880 fl->fl_start = (loff_t)offset;
4881 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4882 if (length == ~(uint64_t)0)
4883 fl->fl_end = OFFSET_MAX;
4884 fl->fl_type = F_WRLCK;
4885 if (type & 1)
4886 fl->fl_type = F_RDLCK;
4887 fl->fl_pid = 0;
4888 }
4889 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4890 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4891 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4892 if (likely(p))
4893 return -NFS4ERR_DENIED;
4894 out_overflow:
4895 print_overflow_msg(__func__, xdr);
4896 return -EIO;
4897 }
4898
4899 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4900 {
4901 int status;
4902
4903 status = decode_op_hdr(xdr, OP_LOCK);
4904 if (status == -EIO)
4905 goto out;
4906 if (status == 0) {
4907 status = decode_stateid(xdr, &res->stateid);
4908 if (unlikely(status))
4909 goto out;
4910 } else if (status == -NFS4ERR_DENIED)
4911 status = decode_lock_denied(xdr, NULL);
4912 if (res->open_seqid != NULL)
4913 nfs_increment_open_seqid(status, res->open_seqid);
4914 nfs_increment_lock_seqid(status, res->lock_seqid);
4915 out:
4916 return status;
4917 }
4918
4919 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4920 {
4921 int status;
4922 status = decode_op_hdr(xdr, OP_LOCKT);
4923 if (status == -NFS4ERR_DENIED)
4924 return decode_lock_denied(xdr, res->denied);
4925 return status;
4926 }
4927
4928 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4929 {
4930 int status;
4931
4932 status = decode_op_hdr(xdr, OP_LOCKU);
4933 if (status != -EIO)
4934 nfs_increment_lock_seqid(status, res->seqid);
4935 if (status == 0)
4936 status = decode_stateid(xdr, &res->stateid);
4937 return status;
4938 }
4939
4940 static int decode_release_lockowner(struct xdr_stream *xdr)
4941 {
4942 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4943 }
4944
4945 static int decode_lookup(struct xdr_stream *xdr)
4946 {
4947 return decode_op_hdr(xdr, OP_LOOKUP);
4948 }
4949
4950 /* This is too sick! */
4951 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4952 {
4953 __be32 *p;
4954 uint32_t limit_type, nblocks, blocksize;
4955
4956 p = xdr_inline_decode(xdr, 12);
4957 if (unlikely(!p))
4958 goto out_overflow;
4959 limit_type = be32_to_cpup(p++);
4960 switch (limit_type) {
4961 case 1:
4962 xdr_decode_hyper(p, maxsize);
4963 break;
4964 case 2:
4965 nblocks = be32_to_cpup(p++);
4966 blocksize = be32_to_cpup(p);
4967 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4968 }
4969 return 0;
4970 out_overflow:
4971 print_overflow_msg(__func__, xdr);
4972 return -EIO;
4973 }
4974
4975 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4976 {
4977 __be32 *p;
4978 uint32_t delegation_type;
4979 int status;
4980
4981 p = xdr_inline_decode(xdr, 4);
4982 if (unlikely(!p))
4983 goto out_overflow;
4984 delegation_type = be32_to_cpup(p);
4985 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4986 res->delegation_type = 0;
4987 return 0;
4988 }
4989 status = decode_stateid(xdr, &res->delegation);
4990 if (unlikely(status))
4991 return status;
4992 p = xdr_inline_decode(xdr, 4);
4993 if (unlikely(!p))
4994 goto out_overflow;
4995 res->do_recall = be32_to_cpup(p);
4996
4997 switch (delegation_type) {
4998 case NFS4_OPEN_DELEGATE_READ:
4999 res->delegation_type = FMODE_READ;
5000 break;
5001 case NFS4_OPEN_DELEGATE_WRITE:
5002 res->delegation_type = FMODE_WRITE|FMODE_READ;
5003 if (decode_space_limit(xdr, &res->maxsize) < 0)
5004 return -EIO;
5005 }
5006 return decode_ace(xdr, NULL, res->server->nfs_client);
5007 out_overflow:
5008 print_overflow_msg(__func__, xdr);
5009 return -EIO;
5010 }
5011
5012 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5013 {
5014 __be32 *p;
5015 uint32_t savewords, bmlen, i;
5016 int status;
5017
5018 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5019 return status;
5020 nfs_increment_open_seqid(status, res->seqid);
5021 if (status)
5022 return status;
5023 status = decode_stateid(xdr, &res->stateid);
5024 if (unlikely(status))
5025 return status;
5026
5027 decode_change_info(xdr, &res->cinfo);
5028
5029 p = xdr_inline_decode(xdr, 8);
5030 if (unlikely(!p))
5031 goto out_overflow;
5032 res->rflags = be32_to_cpup(p++);
5033 bmlen = be32_to_cpup(p);
5034 if (bmlen > 10)
5035 goto xdr_error;
5036
5037 p = xdr_inline_decode(xdr, bmlen << 2);
5038 if (unlikely(!p))
5039 goto out_overflow;
5040 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5041 for (i = 0; i < savewords; ++i)
5042 res->attrset[i] = be32_to_cpup(p++);
5043 for (; i < NFS4_BITMAP_SIZE; i++)
5044 res->attrset[i] = 0;
5045
5046 return decode_delegation(xdr, res);
5047 xdr_error:
5048 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5049 return -EIO;
5050 out_overflow:
5051 print_overflow_msg(__func__, xdr);
5052 return -EIO;
5053 }
5054
5055 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5056 {
5057 int status;
5058
5059 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5060 if (status != -EIO)
5061 nfs_increment_open_seqid(status, res->seqid);
5062 if (!status)
5063 status = decode_stateid(xdr, &res->stateid);
5064 return status;
5065 }
5066
5067 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5068 {
5069 int status;
5070
5071 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5072 if (status != -EIO)
5073 nfs_increment_open_seqid(status, res->seqid);
5074 if (!status)
5075 status = decode_stateid(xdr, &res->stateid);
5076 return status;
5077 }
5078
5079 static int decode_putfh(struct xdr_stream *xdr)
5080 {
5081 return decode_op_hdr(xdr, OP_PUTFH);
5082 }
5083
5084 static int decode_putrootfh(struct xdr_stream *xdr)
5085 {
5086 return decode_op_hdr(xdr, OP_PUTROOTFH);
5087 }
5088
5089 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5090 {
5091 __be32 *p;
5092 uint32_t count, eof, recvd;
5093 int status;
5094
5095 status = decode_op_hdr(xdr, OP_READ);
5096 if (status)
5097 return status;
5098 p = xdr_inline_decode(xdr, 8);
5099 if (unlikely(!p))
5100 goto out_overflow;
5101 eof = be32_to_cpup(p++);
5102 count = be32_to_cpup(p);
5103 recvd = xdr_read_pages(xdr, count);
5104 if (count > recvd) {
5105 dprintk("NFS: server cheating in read reply: "
5106 "count %u > recvd %u\n", count, recvd);
5107 count = recvd;
5108 eof = 0;
5109 }
5110 res->eof = eof;
5111 res->count = count;
5112 return 0;
5113 out_overflow:
5114 print_overflow_msg(__func__, xdr);
5115 return -EIO;
5116 }
5117
5118 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5119 {
5120 int status;
5121 __be32 verf[2];
5122
5123 status = decode_op_hdr(xdr, OP_READDIR);
5124 if (!status)
5125 status = decode_verifier(xdr, readdir->verifier.data);
5126 if (unlikely(status))
5127 return status;
5128 memcpy(verf, readdir->verifier.data, sizeof(verf));
5129 dprintk("%s: verifier = %08x:%08x\n",
5130 __func__, verf[0], verf[1]);
5131 return xdr_read_pages(xdr, xdr->buf->page_len);
5132 }
5133
5134 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5135 {
5136 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5137 u32 len, recvd;
5138 __be32 *p;
5139 int status;
5140
5141 status = decode_op_hdr(xdr, OP_READLINK);
5142 if (status)
5143 return status;
5144
5145 /* Convert length of symlink */
5146 p = xdr_inline_decode(xdr, 4);
5147 if (unlikely(!p))
5148 goto out_overflow;
5149 len = be32_to_cpup(p);
5150 if (len >= rcvbuf->page_len || len <= 0) {
5151 dprintk("nfs: server returned giant symlink!\n");
5152 return -ENAMETOOLONG;
5153 }
5154 recvd = xdr_read_pages(xdr, len);
5155 if (recvd < len) {
5156 dprintk("NFS: server cheating in readlink reply: "
5157 "count %u > recvd %u\n", len, recvd);
5158 return -EIO;
5159 }
5160 /*
5161 * The XDR encode routine has set things up so that
5162 * the link text will be copied directly into the
5163 * buffer. We just have to do overflow-checking,
5164 * and and null-terminate the text (the VFS expects
5165 * null-termination).
5166 */
5167 xdr_terminate_string(rcvbuf, len);
5168 return 0;
5169 out_overflow:
5170 print_overflow_msg(__func__, xdr);
5171 return -EIO;
5172 }
5173
5174 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5175 {
5176 int status;
5177
5178 status = decode_op_hdr(xdr, OP_REMOVE);
5179 if (status)
5180 goto out;
5181 status = decode_change_info(xdr, cinfo);
5182 out:
5183 return status;
5184 }
5185
5186 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5187 struct nfs4_change_info *new_cinfo)
5188 {
5189 int status;
5190
5191 status = decode_op_hdr(xdr, OP_RENAME);
5192 if (status)
5193 goto out;
5194 if ((status = decode_change_info(xdr, old_cinfo)))
5195 goto out;
5196 status = decode_change_info(xdr, new_cinfo);
5197 out:
5198 return status;
5199 }
5200
5201 static int decode_renew(struct xdr_stream *xdr)
5202 {
5203 return decode_op_hdr(xdr, OP_RENEW);
5204 }
5205
5206 static int
5207 decode_restorefh(struct xdr_stream *xdr)
5208 {
5209 return decode_op_hdr(xdr, OP_RESTOREFH);
5210 }
5211
5212 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5213 struct nfs_getaclres *res)
5214 {
5215 unsigned int savep;
5216 uint32_t attrlen,
5217 bitmap[3] = {0};
5218 int status;
5219 unsigned int pg_offset;
5220
5221 res->acl_len = 0;
5222 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5223 goto out;
5224
5225 xdr_enter_page(xdr, xdr->buf->page_len);
5226
5227 /* Calculate the offset of the page data */
5228 pg_offset = xdr->buf->head[0].iov_len;
5229
5230 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5231 goto out;
5232 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5233 goto out;
5234
5235 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5236 return -EIO;
5237 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5238
5239 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5240 * are stored with the acl data to handle the problem of
5241 * variable length bitmaps.*/
5242 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5243 res->acl_len = attrlen;
5244
5245 /* Check for receive buffer overflow */
5246 if (res->acl_len > (xdr->nwords << 2) ||
5247 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5248 res->acl_flags |= NFS4_ACL_TRUNC;
5249 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5250 attrlen, xdr->nwords << 2);
5251 }
5252 } else
5253 status = -EOPNOTSUPP;
5254
5255 out:
5256 return status;
5257 }
5258
5259 static int
5260 decode_savefh(struct xdr_stream *xdr)
5261 {
5262 return decode_op_hdr(xdr, OP_SAVEFH);
5263 }
5264
5265 static int decode_setattr(struct xdr_stream *xdr)
5266 {
5267 __be32 *p;
5268 uint32_t bmlen;
5269 int status;
5270
5271 status = decode_op_hdr(xdr, OP_SETATTR);
5272 if (status)
5273 return status;
5274 p = xdr_inline_decode(xdr, 4);
5275 if (unlikely(!p))
5276 goto out_overflow;
5277 bmlen = be32_to_cpup(p);
5278 p = xdr_inline_decode(xdr, bmlen << 2);
5279 if (likely(p))
5280 return 0;
5281 out_overflow:
5282 print_overflow_msg(__func__, xdr);
5283 return -EIO;
5284 }
5285
5286 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5287 {
5288 __be32 *p;
5289 uint32_t opnum;
5290 int32_t nfserr;
5291
5292 p = xdr_inline_decode(xdr, 8);
5293 if (unlikely(!p))
5294 goto out_overflow;
5295 opnum = be32_to_cpup(p++);
5296 if (opnum != OP_SETCLIENTID) {
5297 dprintk("nfs: decode_setclientid: Server returned operation"
5298 " %d\n", opnum);
5299 return -EIO;
5300 }
5301 nfserr = be32_to_cpup(p);
5302 if (nfserr == NFS_OK) {
5303 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5304 if (unlikely(!p))
5305 goto out_overflow;
5306 p = xdr_decode_hyper(p, &res->clientid);
5307 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5308 } else if (nfserr == NFSERR_CLID_INUSE) {
5309 uint32_t len;
5310
5311 /* skip netid string */
5312 p = xdr_inline_decode(xdr, 4);
5313 if (unlikely(!p))
5314 goto out_overflow;
5315 len = be32_to_cpup(p);
5316 p = xdr_inline_decode(xdr, len);
5317 if (unlikely(!p))
5318 goto out_overflow;
5319
5320 /* skip uaddr string */
5321 p = xdr_inline_decode(xdr, 4);
5322 if (unlikely(!p))
5323 goto out_overflow;
5324 len = be32_to_cpup(p);
5325 p = xdr_inline_decode(xdr, len);
5326 if (unlikely(!p))
5327 goto out_overflow;
5328 return -NFSERR_CLID_INUSE;
5329 } else
5330 return nfs4_stat_to_errno(nfserr);
5331
5332 return 0;
5333 out_overflow:
5334 print_overflow_msg(__func__, xdr);
5335 return -EIO;
5336 }
5337
5338 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5339 {
5340 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5341 }
5342
5343 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5344 {
5345 __be32 *p;
5346 int status;
5347
5348 status = decode_op_hdr(xdr, OP_WRITE);
5349 if (status)
5350 return status;
5351
5352 p = xdr_inline_decode(xdr, 8);
5353 if (unlikely(!p))
5354 goto out_overflow;
5355 res->count = be32_to_cpup(p++);
5356 res->verf->committed = be32_to_cpup(p++);
5357 return decode_write_verifier(xdr, &res->verf->verifier);
5358 out_overflow:
5359 print_overflow_msg(__func__, xdr);
5360 return -EIO;
5361 }
5362
5363 static int decode_delegreturn(struct xdr_stream *xdr)
5364 {
5365 return decode_op_hdr(xdr, OP_DELEGRETURN);
5366 }
5367
5368 static int decode_secinfo_gss(struct xdr_stream *xdr,
5369 struct nfs4_secinfo4 *flavor)
5370 {
5371 u32 oid_len;
5372 __be32 *p;
5373
5374 p = xdr_inline_decode(xdr, 4);
5375 if (unlikely(!p))
5376 goto out_overflow;
5377 oid_len = be32_to_cpup(p);
5378 if (oid_len > GSS_OID_MAX_LEN)
5379 goto out_err;
5380
5381 p = xdr_inline_decode(xdr, oid_len);
5382 if (unlikely(!p))
5383 goto out_overflow;
5384 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5385 flavor->flavor_info.oid.len = oid_len;
5386
5387 p = xdr_inline_decode(xdr, 8);
5388 if (unlikely(!p))
5389 goto out_overflow;
5390 flavor->flavor_info.qop = be32_to_cpup(p++);
5391 flavor->flavor_info.service = be32_to_cpup(p);
5392
5393 return 0;
5394
5395 out_overflow:
5396 print_overflow_msg(__func__, xdr);
5397 return -EIO;
5398 out_err:
5399 return -EINVAL;
5400 }
5401
5402 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5403 {
5404 struct nfs4_secinfo4 *sec_flavor;
5405 unsigned int i, num_flavors;
5406 int status;
5407 __be32 *p;
5408
5409 p = xdr_inline_decode(xdr, 4);
5410 if (unlikely(!p))
5411 goto out_overflow;
5412
5413 res->flavors->num_flavors = 0;
5414 num_flavors = be32_to_cpup(p);
5415
5416 for (i = 0; i < num_flavors; i++) {
5417 sec_flavor = &res->flavors->flavors[i];
5418 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5419 break;
5420
5421 p = xdr_inline_decode(xdr, 4);
5422 if (unlikely(!p))
5423 goto out_overflow;
5424 sec_flavor->flavor = be32_to_cpup(p);
5425
5426 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5427 status = decode_secinfo_gss(xdr, sec_flavor);
5428 if (status)
5429 goto out;
5430 }
5431 res->flavors->num_flavors++;
5432 }
5433
5434 status = 0;
5435 out:
5436 return status;
5437 out_overflow:
5438 print_overflow_msg(__func__, xdr);
5439 return -EIO;
5440 }
5441
5442 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5443 {
5444 int status = decode_op_hdr(xdr, OP_SECINFO);
5445 if (status)
5446 return status;
5447 return decode_secinfo_common(xdr, res);
5448 }
5449
5450 #if defined(CONFIG_NFS_V4_1)
5451 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5452 {
5453 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5454 if (status)
5455 return status;
5456 return decode_secinfo_common(xdr, res);
5457 }
5458
5459 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5460 {
5461 __be32 *p;
5462 uint32_t bitmap_words;
5463 unsigned int i;
5464
5465 p = xdr_inline_decode(xdr, 4);
5466 bitmap_words = be32_to_cpup(p++);
5467 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5468 return -EIO;
5469 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5470 for (i = 0; i < bitmap_words; i++)
5471 op_map->u.words[i] = be32_to_cpup(p++);
5472
5473 return 0;
5474 }
5475
5476 static int decode_exchange_id(struct xdr_stream *xdr,
5477 struct nfs41_exchange_id_res *res)
5478 {
5479 __be32 *p;
5480 uint32_t dummy;
5481 char *dummy_str;
5482 int status;
5483 uint32_t impl_id_count;
5484
5485 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5486 if (status)
5487 return status;
5488
5489 p = xdr_inline_decode(xdr, 8);
5490 if (unlikely(!p))
5491 goto out_overflow;
5492 xdr_decode_hyper(p, &res->clientid);
5493 p = xdr_inline_decode(xdr, 12);
5494 if (unlikely(!p))
5495 goto out_overflow;
5496 res->seqid = be32_to_cpup(p++);
5497 res->flags = be32_to_cpup(p++);
5498
5499 res->state_protect.how = be32_to_cpup(p);
5500 switch (res->state_protect.how) {
5501 case SP4_NONE:
5502 break;
5503 case SP4_MACH_CRED:
5504 status = decode_op_map(xdr, &res->state_protect.enforce);
5505 if (status)
5506 return status;
5507 status = decode_op_map(xdr, &res->state_protect.allow);
5508 if (status)
5509 return status;
5510 break;
5511 default:
5512 WARN_ON_ONCE(1);
5513 return -EIO;
5514 }
5515
5516 /* server_owner4.so_minor_id */
5517 p = xdr_inline_decode(xdr, 8);
5518 if (unlikely(!p))
5519 goto out_overflow;
5520 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5521
5522 /* server_owner4.so_major_id */
5523 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5524 if (unlikely(status))
5525 return status;
5526 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5527 return -EIO;
5528 memcpy(res->server_owner->major_id, dummy_str, dummy);
5529 res->server_owner->major_id_sz = dummy;
5530
5531 /* server_scope4 */
5532 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5533 if (unlikely(status))
5534 return status;
5535 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5536 return -EIO;
5537 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5538 res->server_scope->server_scope_sz = dummy;
5539
5540 /* Implementation Id */
5541 p = xdr_inline_decode(xdr, 4);
5542 if (unlikely(!p))
5543 goto out_overflow;
5544 impl_id_count = be32_to_cpup(p++);
5545
5546 if (impl_id_count) {
5547 /* nii_domain */
5548 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5549 if (unlikely(status))
5550 return status;
5551 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5552 return -EIO;
5553 memcpy(res->impl_id->domain, dummy_str, dummy);
5554
5555 /* nii_name */
5556 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5557 if (unlikely(status))
5558 return status;
5559 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5560 return -EIO;
5561 memcpy(res->impl_id->name, dummy_str, dummy);
5562
5563 /* nii_date */
5564 p = xdr_inline_decode(xdr, 12);
5565 if (unlikely(!p))
5566 goto out_overflow;
5567 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5568 res->impl_id->date.nseconds = be32_to_cpup(p);
5569
5570 /* if there's more than one entry, ignore the rest */
5571 }
5572 return 0;
5573 out_overflow:
5574 print_overflow_msg(__func__, xdr);
5575 return -EIO;
5576 }
5577
5578 static int decode_chan_attrs(struct xdr_stream *xdr,
5579 struct nfs4_channel_attrs *attrs)
5580 {
5581 __be32 *p;
5582 u32 nr_attrs, val;
5583
5584 p = xdr_inline_decode(xdr, 28);
5585 if (unlikely(!p))
5586 goto out_overflow;
5587 val = be32_to_cpup(p++); /* headerpadsz */
5588 if (val)
5589 return -EINVAL; /* no support for header padding yet */
5590 attrs->max_rqst_sz = be32_to_cpup(p++);
5591 attrs->max_resp_sz = be32_to_cpup(p++);
5592 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5593 attrs->max_ops = be32_to_cpup(p++);
5594 attrs->max_reqs = be32_to_cpup(p++);
5595 nr_attrs = be32_to_cpup(p);
5596 if (unlikely(nr_attrs > 1)) {
5597 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5598 "count %u\n", __func__, nr_attrs);
5599 return -EINVAL;
5600 }
5601 if (nr_attrs == 1) {
5602 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5603 if (unlikely(!p))
5604 goto out_overflow;
5605 }
5606 return 0;
5607 out_overflow:
5608 print_overflow_msg(__func__, xdr);
5609 return -EIO;
5610 }
5611
5612 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5613 {
5614 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5615 }
5616
5617 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5618 struct nfs41_bind_conn_to_session_res *res)
5619 {
5620 __be32 *p;
5621 int status;
5622
5623 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5624 if (!status)
5625 status = decode_sessionid(xdr, &res->session->sess_id);
5626 if (unlikely(status))
5627 return status;
5628
5629 /* dir flags, rdma mode bool */
5630 p = xdr_inline_decode(xdr, 8);
5631 if (unlikely(!p))
5632 goto out_overflow;
5633
5634 res->dir = be32_to_cpup(p++);
5635 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5636 return -EIO;
5637 if (be32_to_cpup(p) == 0)
5638 res->use_conn_in_rdma_mode = false;
5639 else
5640 res->use_conn_in_rdma_mode = true;
5641
5642 return 0;
5643 out_overflow:
5644 print_overflow_msg(__func__, xdr);
5645 return -EIO;
5646 }
5647
5648 static int decode_create_session(struct xdr_stream *xdr,
5649 struct nfs41_create_session_res *res)
5650 {
5651 __be32 *p;
5652 int status;
5653 struct nfs_client *clp = res->client;
5654 struct nfs4_session *session = clp->cl_session;
5655
5656 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5657 if (!status)
5658 status = decode_sessionid(xdr, &session->sess_id);
5659 if (unlikely(status))
5660 return status;
5661
5662 /* seqid, flags */
5663 p = xdr_inline_decode(xdr, 8);
5664 if (unlikely(!p))
5665 goto out_overflow;
5666 clp->cl_seqid = be32_to_cpup(p++);
5667 session->flags = be32_to_cpup(p);
5668
5669 /* Channel attributes */
5670 status = decode_chan_attrs(xdr, &session->fc_attrs);
5671 if (!status)
5672 status = decode_chan_attrs(xdr, &session->bc_attrs);
5673 return status;
5674 out_overflow:
5675 print_overflow_msg(__func__, xdr);
5676 return -EIO;
5677 }
5678
5679 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5680 {
5681 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5682 }
5683
5684 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5685 {
5686 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5687 }
5688
5689 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5690 {
5691 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5692 }
5693 #endif /* CONFIG_NFS_V4_1 */
5694
5695 static int decode_sequence(struct xdr_stream *xdr,
5696 struct nfs4_sequence_res *res,
5697 struct rpc_rqst *rqstp)
5698 {
5699 #if defined(CONFIG_NFS_V4_1)
5700 struct nfs4_session *session;
5701 struct nfs4_sessionid id;
5702 u32 dummy;
5703 int status;
5704 __be32 *p;
5705
5706 if (res->sr_slot == NULL)
5707 return 0;
5708 if (!res->sr_slot->table->session)
5709 return 0;
5710
5711 status = decode_op_hdr(xdr, OP_SEQUENCE);
5712 if (!status)
5713 status = decode_sessionid(xdr, &id);
5714 if (unlikely(status))
5715 goto out_err;
5716
5717 /*
5718 * If the server returns different values for sessionID, slotID or
5719 * sequence number, the server is looney tunes.
5720 */
5721 status = -EREMOTEIO;
5722 session = res->sr_slot->table->session;
5723
5724 if (memcmp(id.data, session->sess_id.data,
5725 NFS4_MAX_SESSIONID_LEN)) {
5726 dprintk("%s Invalid session id\n", __func__);
5727 goto out_err;
5728 }
5729
5730 p = xdr_inline_decode(xdr, 20);
5731 if (unlikely(!p))
5732 goto out_overflow;
5733
5734 /* seqid */
5735 dummy = be32_to_cpup(p++);
5736 if (dummy != res->sr_slot->seq_nr) {
5737 dprintk("%s Invalid sequence number\n", __func__);
5738 goto out_err;
5739 }
5740 /* slot id */
5741 dummy = be32_to_cpup(p++);
5742 if (dummy != res->sr_slot->slot_nr) {
5743 dprintk("%s Invalid slot id\n", __func__);
5744 goto out_err;
5745 }
5746 /* highest slot id */
5747 res->sr_highest_slotid = be32_to_cpup(p++);
5748 /* target highest slot id */
5749 res->sr_target_highest_slotid = be32_to_cpup(p++);
5750 /* result flags */
5751 res->sr_status_flags = be32_to_cpup(p);
5752 status = 0;
5753 out_err:
5754 res->sr_status = status;
5755 return status;
5756 out_overflow:
5757 print_overflow_msg(__func__, xdr);
5758 status = -EIO;
5759 goto out_err;
5760 #else /* CONFIG_NFS_V4_1 */
5761 return 0;
5762 #endif /* CONFIG_NFS_V4_1 */
5763 }
5764
5765 #if defined(CONFIG_NFS_V4_1)
5766 /*
5767 * TODO: Need to handle case when EOF != true;
5768 */
5769 static int decode_getdevicelist(struct xdr_stream *xdr,
5770 struct pnfs_devicelist *res)
5771 {
5772 __be32 *p;
5773 int status, i;
5774 nfs4_verifier verftemp;
5775
5776 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5777 if (status)
5778 return status;
5779
5780 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5781 if (unlikely(!p))
5782 goto out_overflow;
5783
5784 /* TODO: Skip cookie for now */
5785 p += 2;
5786
5787 /* Read verifier */
5788 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5789
5790 res->num_devs = be32_to_cpup(p);
5791
5792 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5793
5794 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5795 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5796 __func__, res->num_devs);
5797 return -EIO;
5798 }
5799
5800 p = xdr_inline_decode(xdr,
5801 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5802 if (unlikely(!p))
5803 goto out_overflow;
5804 for (i = 0; i < res->num_devs; i++)
5805 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5806 NFS4_DEVICEID4_SIZE);
5807 res->eof = be32_to_cpup(p);
5808 return 0;
5809 out_overflow:
5810 print_overflow_msg(__func__, xdr);
5811 return -EIO;
5812 }
5813
5814 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5815 struct pnfs_device *pdev)
5816 {
5817 __be32 *p;
5818 uint32_t len, type;
5819 int status;
5820
5821 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5822 if (status) {
5823 if (status == -ETOOSMALL) {
5824 p = xdr_inline_decode(xdr, 4);
5825 if (unlikely(!p))
5826 goto out_overflow;
5827 pdev->mincount = be32_to_cpup(p);
5828 dprintk("%s: Min count too small. mincnt = %u\n",
5829 __func__, pdev->mincount);
5830 }
5831 return status;
5832 }
5833
5834 p = xdr_inline_decode(xdr, 8);
5835 if (unlikely(!p))
5836 goto out_overflow;
5837 type = be32_to_cpup(p++);
5838 if (type != pdev->layout_type) {
5839 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5840 __func__, pdev->layout_type, type);
5841 return -EINVAL;
5842 }
5843 /*
5844 * Get the length of the opaque device_addr4. xdr_read_pages places
5845 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5846 * and places the remaining xdr data in xdr_buf->tail
5847 */
5848 pdev->mincount = be32_to_cpup(p);
5849 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5850 goto out_overflow;
5851
5852 /* Parse notification bitmap, verifying that it is zero. */
5853 p = xdr_inline_decode(xdr, 4);
5854 if (unlikely(!p))
5855 goto out_overflow;
5856 len = be32_to_cpup(p);
5857 if (len) {
5858 uint32_t i;
5859
5860 p = xdr_inline_decode(xdr, 4 * len);
5861 if (unlikely(!p))
5862 goto out_overflow;
5863 for (i = 0; i < len; i++, p++) {
5864 if (be32_to_cpup(p)) {
5865 dprintk("%s: notifications not supported\n",
5866 __func__);
5867 return -EIO;
5868 }
5869 }
5870 }
5871 return 0;
5872 out_overflow:
5873 print_overflow_msg(__func__, xdr);
5874 return -EIO;
5875 }
5876
5877 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5878 struct nfs4_layoutget_res *res)
5879 {
5880 __be32 *p;
5881 int status;
5882 u32 layout_count;
5883 u32 recvd;
5884
5885 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5886 if (status)
5887 return status;
5888 p = xdr_inline_decode(xdr, 4);
5889 if (unlikely(!p))
5890 goto out_overflow;
5891 res->return_on_close = be32_to_cpup(p);
5892 decode_stateid(xdr, &res->stateid);
5893 p = xdr_inline_decode(xdr, 4);
5894 if (unlikely(!p))
5895 goto out_overflow;
5896 layout_count = be32_to_cpup(p);
5897 if (!layout_count) {
5898 dprintk("%s: server responded with empty layout array\n",
5899 __func__);
5900 return -EINVAL;
5901 }
5902
5903 p = xdr_inline_decode(xdr, 28);
5904 if (unlikely(!p))
5905 goto out_overflow;
5906 p = xdr_decode_hyper(p, &res->range.offset);
5907 p = xdr_decode_hyper(p, &res->range.length);
5908 res->range.iomode = be32_to_cpup(p++);
5909 res->type = be32_to_cpup(p++);
5910 res->layoutp->len = be32_to_cpup(p);
5911
5912 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5913 __func__,
5914 (unsigned long)res->range.offset,
5915 (unsigned long)res->range.length,
5916 res->range.iomode,
5917 res->type,
5918 res->layoutp->len);
5919
5920 recvd = xdr_read_pages(xdr, res->layoutp->len);
5921 if (res->layoutp->len > recvd) {
5922 dprintk("NFS: server cheating in layoutget reply: "
5923 "layout len %u > recvd %u\n",
5924 res->layoutp->len, recvd);
5925 return -EINVAL;
5926 }
5927
5928 if (layout_count > 1) {
5929 /* We only handle a length one array at the moment. Any
5930 * further entries are just ignored. Note that this means
5931 * the client may see a response that is less than the
5932 * minimum it requested.
5933 */
5934 dprintk("%s: server responded with %d layouts, dropping tail\n",
5935 __func__, layout_count);
5936 }
5937
5938 return 0;
5939 out_overflow:
5940 print_overflow_msg(__func__, xdr);
5941 return -EIO;
5942 }
5943
5944 static int decode_layoutreturn(struct xdr_stream *xdr,
5945 struct nfs4_layoutreturn_res *res)
5946 {
5947 __be32 *p;
5948 int status;
5949
5950 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5951 if (status)
5952 return status;
5953 p = xdr_inline_decode(xdr, 4);
5954 if (unlikely(!p))
5955 goto out_overflow;
5956 res->lrs_present = be32_to_cpup(p);
5957 if (res->lrs_present)
5958 status = decode_stateid(xdr, &res->stateid);
5959 return status;
5960 out_overflow:
5961 print_overflow_msg(__func__, xdr);
5962 return -EIO;
5963 }
5964
5965 static int decode_layoutcommit(struct xdr_stream *xdr,
5966 struct rpc_rqst *req,
5967 struct nfs4_layoutcommit_res *res)
5968 {
5969 __be32 *p;
5970 __u32 sizechanged;
5971 int status;
5972
5973 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5974 res->status = status;
5975 if (status)
5976 return status;
5977
5978 p = xdr_inline_decode(xdr, 4);
5979 if (unlikely(!p))
5980 goto out_overflow;
5981 sizechanged = be32_to_cpup(p);
5982
5983 if (sizechanged) {
5984 /* throw away new size */
5985 p = xdr_inline_decode(xdr, 8);
5986 if (unlikely(!p))
5987 goto out_overflow;
5988 }
5989 return 0;
5990 out_overflow:
5991 print_overflow_msg(__func__, xdr);
5992 return -EIO;
5993 }
5994
5995 static int decode_test_stateid(struct xdr_stream *xdr,
5996 struct nfs41_test_stateid_res *res)
5997 {
5998 __be32 *p;
5999 int status;
6000 int num_res;
6001
6002 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6003 if (status)
6004 return status;
6005
6006 p = xdr_inline_decode(xdr, 4);
6007 if (unlikely(!p))
6008 goto out_overflow;
6009 num_res = be32_to_cpup(p++);
6010 if (num_res != 1)
6011 goto out;
6012
6013 p = xdr_inline_decode(xdr, 4);
6014 if (unlikely(!p))
6015 goto out_overflow;
6016 res->status = be32_to_cpup(p++);
6017
6018 return status;
6019 out_overflow:
6020 print_overflow_msg(__func__, xdr);
6021 out:
6022 return -EIO;
6023 }
6024
6025 static int decode_free_stateid(struct xdr_stream *xdr,
6026 struct nfs41_free_stateid_res *res)
6027 {
6028 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6029 return res->status;
6030 }
6031 #endif /* CONFIG_NFS_V4_1 */
6032
6033 /*
6034 * END OF "GENERIC" DECODE ROUTINES.
6035 */
6036
6037 /*
6038 * Decode OPEN_DOWNGRADE response
6039 */
6040 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6041 struct xdr_stream *xdr,
6042 struct nfs_closeres *res)
6043 {
6044 struct compound_hdr hdr;
6045 int status;
6046
6047 status = decode_compound_hdr(xdr, &hdr);
6048 if (status)
6049 goto out;
6050 status = decode_sequence(xdr, &res->seq_res, rqstp);
6051 if (status)
6052 goto out;
6053 status = decode_putfh(xdr);
6054 if (status)
6055 goto out;
6056 status = decode_open_downgrade(xdr, res);
6057 if (status != 0)
6058 goto out;
6059 decode_getfattr(xdr, res->fattr, res->server);
6060 out:
6061 return status;
6062 }
6063
6064 /*
6065 * Decode ACCESS response
6066 */
6067 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6068 struct nfs4_accessres *res)
6069 {
6070 struct compound_hdr hdr;
6071 int status;
6072
6073 status = decode_compound_hdr(xdr, &hdr);
6074 if (status)
6075 goto out;
6076 status = decode_sequence(xdr, &res->seq_res, rqstp);
6077 if (status)
6078 goto out;
6079 status = decode_putfh(xdr);
6080 if (status != 0)
6081 goto out;
6082 status = decode_access(xdr, &res->supported, &res->access);
6083 if (status != 0)
6084 goto out;
6085 decode_getfattr(xdr, res->fattr, res->server);
6086 out:
6087 return status;
6088 }
6089
6090 /*
6091 * Decode LOOKUP response
6092 */
6093 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094 struct nfs4_lookup_res *res)
6095 {
6096 struct compound_hdr hdr;
6097 int status;
6098
6099 status = decode_compound_hdr(xdr, &hdr);
6100 if (status)
6101 goto out;
6102 status = decode_sequence(xdr, &res->seq_res, rqstp);
6103 if (status)
6104 goto out;
6105 status = decode_putfh(xdr);
6106 if (status)
6107 goto out;
6108 status = decode_lookup(xdr);
6109 if (status)
6110 goto out;
6111 status = decode_getfh(xdr, res->fh);
6112 if (status)
6113 goto out;
6114 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6115 out:
6116 return status;
6117 }
6118
6119 /*
6120 * Decode LOOKUP_ROOT response
6121 */
6122 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6123 struct xdr_stream *xdr,
6124 struct nfs4_lookup_res *res)
6125 {
6126 struct compound_hdr hdr;
6127 int status;
6128
6129 status = decode_compound_hdr(xdr, &hdr);
6130 if (status)
6131 goto out;
6132 status = decode_sequence(xdr, &res->seq_res, rqstp);
6133 if (status)
6134 goto out;
6135 status = decode_putrootfh(xdr);
6136 if (status)
6137 goto out;
6138 status = decode_getfh(xdr, res->fh);
6139 if (status == 0)
6140 status = decode_getfattr_label(xdr, res->fattr,
6141 res->label, res->server);
6142 out:
6143 return status;
6144 }
6145
6146 /*
6147 * Decode REMOVE response
6148 */
6149 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6150 struct nfs_removeres *res)
6151 {
6152 struct compound_hdr hdr;
6153 int status;
6154
6155 status = decode_compound_hdr(xdr, &hdr);
6156 if (status)
6157 goto out;
6158 status = decode_sequence(xdr, &res->seq_res, rqstp);
6159 if (status)
6160 goto out;
6161 status = decode_putfh(xdr);
6162 if (status)
6163 goto out;
6164 status = decode_remove(xdr, &res->cinfo);
6165 out:
6166 return status;
6167 }
6168
6169 /*
6170 * Decode RENAME response
6171 */
6172 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6173 struct nfs_renameres *res)
6174 {
6175 struct compound_hdr hdr;
6176 int status;
6177
6178 status = decode_compound_hdr(xdr, &hdr);
6179 if (status)
6180 goto out;
6181 status = decode_sequence(xdr, &res->seq_res, rqstp);
6182 if (status)
6183 goto out;
6184 status = decode_putfh(xdr);
6185 if (status)
6186 goto out;
6187 status = decode_savefh(xdr);
6188 if (status)
6189 goto out;
6190 status = decode_putfh(xdr);
6191 if (status)
6192 goto out;
6193 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6194 out:
6195 return status;
6196 }
6197
6198 /*
6199 * Decode LINK response
6200 */
6201 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6202 struct nfs4_link_res *res)
6203 {
6204 struct compound_hdr hdr;
6205 int status;
6206
6207 status = decode_compound_hdr(xdr, &hdr);
6208 if (status)
6209 goto out;
6210 status = decode_sequence(xdr, &res->seq_res, rqstp);
6211 if (status)
6212 goto out;
6213 status = decode_putfh(xdr);
6214 if (status)
6215 goto out;
6216 status = decode_savefh(xdr);
6217 if (status)
6218 goto out;
6219 status = decode_putfh(xdr);
6220 if (status)
6221 goto out;
6222 status = decode_link(xdr, &res->cinfo);
6223 if (status)
6224 goto out;
6225 /*
6226 * Note order: OP_LINK leaves the directory as the current
6227 * filehandle.
6228 */
6229 status = decode_restorefh(xdr);
6230 if (status)
6231 goto out;
6232 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6233 out:
6234 return status;
6235 }
6236
6237 /*
6238 * Decode CREATE response
6239 */
6240 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241 struct nfs4_create_res *res)
6242 {
6243 struct compound_hdr hdr;
6244 int status;
6245
6246 status = decode_compound_hdr(xdr, &hdr);
6247 if (status)
6248 goto out;
6249 status = decode_sequence(xdr, &res->seq_res, rqstp);
6250 if (status)
6251 goto out;
6252 status = decode_putfh(xdr);
6253 if (status)
6254 goto out;
6255 status = decode_create(xdr, &res->dir_cinfo);
6256 if (status)
6257 goto out;
6258 status = decode_getfh(xdr, res->fh);
6259 if (status)
6260 goto out;
6261 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6262 out:
6263 return status;
6264 }
6265
6266 /*
6267 * Decode SYMLINK response
6268 */
6269 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6270 struct nfs4_create_res *res)
6271 {
6272 return nfs4_xdr_dec_create(rqstp, xdr, res);
6273 }
6274
6275 /*
6276 * Decode GETATTR response
6277 */
6278 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279 struct nfs4_getattr_res *res)
6280 {
6281 struct compound_hdr hdr;
6282 int status;
6283
6284 status = decode_compound_hdr(xdr, &hdr);
6285 if (status)
6286 goto out;
6287 status = decode_sequence(xdr, &res->seq_res, rqstp);
6288 if (status)
6289 goto out;
6290 status = decode_putfh(xdr);
6291 if (status)
6292 goto out;
6293 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6294 out:
6295 return status;
6296 }
6297
6298 /*
6299 * Encode an SETACL request
6300 */
6301 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6302 struct nfs_setaclargs *args)
6303 {
6304 struct compound_hdr hdr = {
6305 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6306 };
6307
6308 encode_compound_hdr(xdr, req, &hdr);
6309 encode_sequence(xdr, &args->seq_args, &hdr);
6310 encode_putfh(xdr, args->fh, &hdr);
6311 encode_setacl(xdr, args, &hdr);
6312 encode_nops(&hdr);
6313 }
6314
6315 /*
6316 * Decode SETACL response
6317 */
6318 static int
6319 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6320 struct nfs_setaclres *res)
6321 {
6322 struct compound_hdr hdr;
6323 int status;
6324
6325 status = decode_compound_hdr(xdr, &hdr);
6326 if (status)
6327 goto out;
6328 status = decode_sequence(xdr, &res->seq_res, rqstp);
6329 if (status)
6330 goto out;
6331 status = decode_putfh(xdr);
6332 if (status)
6333 goto out;
6334 status = decode_setattr(xdr);
6335 out:
6336 return status;
6337 }
6338
6339 /*
6340 * Decode GETACL response
6341 */
6342 static int
6343 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6344 struct nfs_getaclres *res)
6345 {
6346 struct compound_hdr hdr;
6347 int status;
6348
6349 if (res->acl_scratch != NULL) {
6350 void *p = page_address(res->acl_scratch);
6351 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6352 }
6353 status = decode_compound_hdr(xdr, &hdr);
6354 if (status)
6355 goto out;
6356 status = decode_sequence(xdr, &res->seq_res, rqstp);
6357 if (status)
6358 goto out;
6359 status = decode_putfh(xdr);
6360 if (status)
6361 goto out;
6362 status = decode_getacl(xdr, rqstp, res);
6363
6364 out:
6365 return status;
6366 }
6367
6368 /*
6369 * Decode CLOSE response
6370 */
6371 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6372 struct nfs_closeres *res)
6373 {
6374 struct compound_hdr hdr;
6375 int status;
6376
6377 status = decode_compound_hdr(xdr, &hdr);
6378 if (status)
6379 goto out;
6380 status = decode_sequence(xdr, &res->seq_res, rqstp);
6381 if (status)
6382 goto out;
6383 status = decode_putfh(xdr);
6384 if (status)
6385 goto out;
6386 status = decode_close(xdr, res);
6387 if (status != 0)
6388 goto out;
6389 /*
6390 * Note: Server may do delete on close for this file
6391 * in which case the getattr call will fail with
6392 * an ESTALE error. Shouldn't be a problem,
6393 * though, since fattr->valid will remain unset.
6394 */
6395 decode_getfattr(xdr, res->fattr, res->server);
6396 out:
6397 return status;
6398 }
6399
6400 /*
6401 * Decode OPEN response
6402 */
6403 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 struct nfs_openres *res)
6405 {
6406 struct compound_hdr hdr;
6407 int status;
6408
6409 status = decode_compound_hdr(xdr, &hdr);
6410 if (status)
6411 goto out;
6412 status = decode_sequence(xdr, &res->seq_res, rqstp);
6413 if (status)
6414 goto out;
6415 status = decode_putfh(xdr);
6416 if (status)
6417 goto out;
6418 status = decode_open(xdr, res);
6419 if (status)
6420 goto out;
6421 status = decode_getfh(xdr, &res->fh);
6422 if (status)
6423 goto out;
6424 if (res->access_request)
6425 decode_access(xdr, &res->access_supported, &res->access_result);
6426 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6427 out:
6428 return status;
6429 }
6430
6431 /*
6432 * Decode OPEN_CONFIRM response
6433 */
6434 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6435 struct xdr_stream *xdr,
6436 struct nfs_open_confirmres *res)
6437 {
6438 struct compound_hdr hdr;
6439 int status;
6440
6441 status = decode_compound_hdr(xdr, &hdr);
6442 if (status)
6443 goto out;
6444 status = decode_putfh(xdr);
6445 if (status)
6446 goto out;
6447 status = decode_open_confirm(xdr, res);
6448 out:
6449 return status;
6450 }
6451
6452 /*
6453 * Decode OPEN response
6454 */
6455 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6456 struct xdr_stream *xdr,
6457 struct nfs_openres *res)
6458 {
6459 struct compound_hdr hdr;
6460 int status;
6461
6462 status = decode_compound_hdr(xdr, &hdr);
6463 if (status)
6464 goto out;
6465 status = decode_sequence(xdr, &res->seq_res, rqstp);
6466 if (status)
6467 goto out;
6468 status = decode_putfh(xdr);
6469 if (status)
6470 goto out;
6471 status = decode_open(xdr, res);
6472 if (status)
6473 goto out;
6474 if (res->access_request)
6475 decode_access(xdr, &res->access_supported, &res->access_result);
6476 decode_getfattr(xdr, res->f_attr, res->server);
6477 out:
6478 return status;
6479 }
6480
6481 /*
6482 * Decode SETATTR response
6483 */
6484 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6485 struct xdr_stream *xdr,
6486 struct nfs_setattrres *res)
6487 {
6488 struct compound_hdr hdr;
6489 int status;
6490
6491 status = decode_compound_hdr(xdr, &hdr);
6492 if (status)
6493 goto out;
6494 status = decode_sequence(xdr, &res->seq_res, rqstp);
6495 if (status)
6496 goto out;
6497 status = decode_putfh(xdr);
6498 if (status)
6499 goto out;
6500 status = decode_setattr(xdr);
6501 if (status)
6502 goto out;
6503 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6504 out:
6505 return status;
6506 }
6507
6508 /*
6509 * Decode LOCK response
6510 */
6511 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512 struct nfs_lock_res *res)
6513 {
6514 struct compound_hdr hdr;
6515 int status;
6516
6517 status = decode_compound_hdr(xdr, &hdr);
6518 if (status)
6519 goto out;
6520 status = decode_sequence(xdr, &res->seq_res, rqstp);
6521 if (status)
6522 goto out;
6523 status = decode_putfh(xdr);
6524 if (status)
6525 goto out;
6526 status = decode_lock(xdr, res);
6527 out:
6528 return status;
6529 }
6530
6531 /*
6532 * Decode LOCKT response
6533 */
6534 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6535 struct nfs_lockt_res *res)
6536 {
6537 struct compound_hdr hdr;
6538 int status;
6539
6540 status = decode_compound_hdr(xdr, &hdr);
6541 if (status)
6542 goto out;
6543 status = decode_sequence(xdr, &res->seq_res, rqstp);
6544 if (status)
6545 goto out;
6546 status = decode_putfh(xdr);
6547 if (status)
6548 goto out;
6549 status = decode_lockt(xdr, res);
6550 out:
6551 return status;
6552 }
6553
6554 /*
6555 * Decode LOCKU response
6556 */
6557 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6558 struct nfs_locku_res *res)
6559 {
6560 struct compound_hdr hdr;
6561 int status;
6562
6563 status = decode_compound_hdr(xdr, &hdr);
6564 if (status)
6565 goto out;
6566 status = decode_sequence(xdr, &res->seq_res, rqstp);
6567 if (status)
6568 goto out;
6569 status = decode_putfh(xdr);
6570 if (status)
6571 goto out;
6572 status = decode_locku(xdr, res);
6573 out:
6574 return status;
6575 }
6576
6577 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6578 struct xdr_stream *xdr, void *dummy)
6579 {
6580 struct compound_hdr hdr;
6581 int status;
6582
6583 status = decode_compound_hdr(xdr, &hdr);
6584 if (!status)
6585 status = decode_release_lockowner(xdr);
6586 return status;
6587 }
6588
6589 /*
6590 * Decode READLINK response
6591 */
6592 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6593 struct xdr_stream *xdr,
6594 struct nfs4_readlink_res *res)
6595 {
6596 struct compound_hdr hdr;
6597 int status;
6598
6599 status = decode_compound_hdr(xdr, &hdr);
6600 if (status)
6601 goto out;
6602 status = decode_sequence(xdr, &res->seq_res, rqstp);
6603 if (status)
6604 goto out;
6605 status = decode_putfh(xdr);
6606 if (status)
6607 goto out;
6608 status = decode_readlink(xdr, rqstp);
6609 out:
6610 return status;
6611 }
6612
6613 /*
6614 * Decode READDIR response
6615 */
6616 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6617 struct nfs4_readdir_res *res)
6618 {
6619 struct compound_hdr hdr;
6620 int status;
6621
6622 status = decode_compound_hdr(xdr, &hdr);
6623 if (status)
6624 goto out;
6625 status = decode_sequence(xdr, &res->seq_res, rqstp);
6626 if (status)
6627 goto out;
6628 status = decode_putfh(xdr);
6629 if (status)
6630 goto out;
6631 status = decode_readdir(xdr, rqstp, res);
6632 out:
6633 return status;
6634 }
6635
6636 /*
6637 * Decode Read response
6638 */
6639 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6640 struct nfs_readres *res)
6641 {
6642 struct compound_hdr hdr;
6643 int status;
6644
6645 status = decode_compound_hdr(xdr, &hdr);
6646 if (status)
6647 goto out;
6648 status = decode_sequence(xdr, &res->seq_res, rqstp);
6649 if (status)
6650 goto out;
6651 status = decode_putfh(xdr);
6652 if (status)
6653 goto out;
6654 status = decode_read(xdr, rqstp, res);
6655 if (!status)
6656 status = res->count;
6657 out:
6658 return status;
6659 }
6660
6661 /*
6662 * Decode WRITE response
6663 */
6664 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6665 struct nfs_writeres *res)
6666 {
6667 struct compound_hdr hdr;
6668 int status;
6669
6670 status = decode_compound_hdr(xdr, &hdr);
6671 if (status)
6672 goto out;
6673 status = decode_sequence(xdr, &res->seq_res, rqstp);
6674 if (status)
6675 goto out;
6676 status = decode_putfh(xdr);
6677 if (status)
6678 goto out;
6679 status = decode_write(xdr, res);
6680 if (status)
6681 goto out;
6682 if (res->fattr)
6683 decode_getfattr(xdr, res->fattr, res->server);
6684 if (!status)
6685 status = res->count;
6686 out:
6687 return status;
6688 }
6689
6690 /*
6691 * Decode COMMIT response
6692 */
6693 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6694 struct nfs_commitres *res)
6695 {
6696 struct compound_hdr hdr;
6697 int status;
6698
6699 status = decode_compound_hdr(xdr, &hdr);
6700 if (status)
6701 goto out;
6702 status = decode_sequence(xdr, &res->seq_res, rqstp);
6703 if (status)
6704 goto out;
6705 status = decode_putfh(xdr);
6706 if (status)
6707 goto out;
6708 status = decode_commit(xdr, res);
6709 out:
6710 return status;
6711 }
6712
6713 /*
6714 * Decode FSINFO response
6715 */
6716 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6717 struct nfs4_fsinfo_res *res)
6718 {
6719 struct compound_hdr hdr;
6720 int status;
6721
6722 status = decode_compound_hdr(xdr, &hdr);
6723 if (!status)
6724 status = decode_sequence(xdr, &res->seq_res, req);
6725 if (!status)
6726 status = decode_putfh(xdr);
6727 if (!status)
6728 status = decode_fsinfo(xdr, res->fsinfo);
6729 return status;
6730 }
6731
6732 /*
6733 * Decode PATHCONF response
6734 */
6735 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6736 struct nfs4_pathconf_res *res)
6737 {
6738 struct compound_hdr hdr;
6739 int status;
6740
6741 status = decode_compound_hdr(xdr, &hdr);
6742 if (!status)
6743 status = decode_sequence(xdr, &res->seq_res, req);
6744 if (!status)
6745 status = decode_putfh(xdr);
6746 if (!status)
6747 status = decode_pathconf(xdr, res->pathconf);
6748 return status;
6749 }
6750
6751 /*
6752 * Decode STATFS response
6753 */
6754 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6755 struct nfs4_statfs_res *res)
6756 {
6757 struct compound_hdr hdr;
6758 int status;
6759
6760 status = decode_compound_hdr(xdr, &hdr);
6761 if (!status)
6762 status = decode_sequence(xdr, &res->seq_res, req);
6763 if (!status)
6764 status = decode_putfh(xdr);
6765 if (!status)
6766 status = decode_statfs(xdr, res->fsstat);
6767 return status;
6768 }
6769
6770 /*
6771 * Decode GETATTR_BITMAP response
6772 */
6773 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6774 struct xdr_stream *xdr,
6775 struct nfs4_server_caps_res *res)
6776 {
6777 struct compound_hdr hdr;
6778 int status;
6779
6780 status = decode_compound_hdr(xdr, &hdr);
6781 if (status)
6782 goto out;
6783 status = decode_sequence(xdr, &res->seq_res, req);
6784 if (status)
6785 goto out;
6786 status = decode_putfh(xdr);
6787 if (status)
6788 goto out;
6789 status = decode_server_caps(xdr, res);
6790 out:
6791 return status;
6792 }
6793
6794 /*
6795 * Decode RENEW response
6796 */
6797 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6798 void *__unused)
6799 {
6800 struct compound_hdr hdr;
6801 int status;
6802
6803 status = decode_compound_hdr(xdr, &hdr);
6804 if (!status)
6805 status = decode_renew(xdr);
6806 return status;
6807 }
6808
6809 /*
6810 * Decode SETCLIENTID response
6811 */
6812 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6813 struct xdr_stream *xdr,
6814 struct nfs4_setclientid_res *res)
6815 {
6816 struct compound_hdr hdr;
6817 int status;
6818
6819 status = decode_compound_hdr(xdr, &hdr);
6820 if (!status)
6821 status = decode_setclientid(xdr, res);
6822 return status;
6823 }
6824
6825 /*
6826 * Decode SETCLIENTID_CONFIRM response
6827 */
6828 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6829 struct xdr_stream *xdr)
6830 {
6831 struct compound_hdr hdr;
6832 int status;
6833
6834 status = decode_compound_hdr(xdr, &hdr);
6835 if (!status)
6836 status = decode_setclientid_confirm(xdr);
6837 return status;
6838 }
6839
6840 /*
6841 * Decode DELEGRETURN response
6842 */
6843 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6844 struct xdr_stream *xdr,
6845 struct nfs4_delegreturnres *res)
6846 {
6847 struct compound_hdr hdr;
6848 int status;
6849
6850 status = decode_compound_hdr(xdr, &hdr);
6851 if (status)
6852 goto out;
6853 status = decode_sequence(xdr, &res->seq_res, rqstp);
6854 if (status)
6855 goto out;
6856 status = decode_putfh(xdr);
6857 if (status != 0)
6858 goto out;
6859 status = decode_getfattr(xdr, res->fattr, res->server);
6860 if (status != 0)
6861 goto out;
6862 status = decode_delegreturn(xdr);
6863 out:
6864 return status;
6865 }
6866
6867 /*
6868 * Decode FS_LOCATIONS response
6869 */
6870 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6871 struct xdr_stream *xdr,
6872 struct nfs4_fs_locations_res *res)
6873 {
6874 struct compound_hdr hdr;
6875 int status;
6876
6877 status = decode_compound_hdr(xdr, &hdr);
6878 if (status)
6879 goto out;
6880 status = decode_sequence(xdr, &res->seq_res, req);
6881 if (status)
6882 goto out;
6883 status = decode_putfh(xdr);
6884 if (status)
6885 goto out;
6886 if (res->migration) {
6887 xdr_enter_page(xdr, PAGE_SIZE);
6888 status = decode_getfattr_generic(xdr,
6889 &res->fs_locations->fattr,
6890 NULL, res->fs_locations,
6891 NULL, res->fs_locations->server);
6892 if (status)
6893 goto out;
6894 if (res->renew)
6895 status = decode_renew(xdr);
6896 } else {
6897 status = decode_lookup(xdr);
6898 if (status)
6899 goto out;
6900 xdr_enter_page(xdr, PAGE_SIZE);
6901 status = decode_getfattr_generic(xdr,
6902 &res->fs_locations->fattr,
6903 NULL, res->fs_locations,
6904 NULL, res->fs_locations->server);
6905 }
6906 out:
6907 return status;
6908 }
6909
6910 /*
6911 * Decode SECINFO response
6912 */
6913 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6914 struct xdr_stream *xdr,
6915 struct nfs4_secinfo_res *res)
6916 {
6917 struct compound_hdr hdr;
6918 int status;
6919
6920 status = decode_compound_hdr(xdr, &hdr);
6921 if (status)
6922 goto out;
6923 status = decode_sequence(xdr, &res->seq_res, rqstp);
6924 if (status)
6925 goto out;
6926 status = decode_putfh(xdr);
6927 if (status)
6928 goto out;
6929 status = decode_secinfo(xdr, res);
6930 out:
6931 return status;
6932 }
6933
6934 /*
6935 * Decode FSID_PRESENT response
6936 */
6937 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6938 struct xdr_stream *xdr,
6939 struct nfs4_fsid_present_res *res)
6940 {
6941 struct compound_hdr hdr;
6942 int status;
6943
6944 status = decode_compound_hdr(xdr, &hdr);
6945 if (status)
6946 goto out;
6947 status = decode_sequence(xdr, &res->seq_res, rqstp);
6948 if (status)
6949 goto out;
6950 status = decode_putfh(xdr);
6951 if (status)
6952 goto out;
6953 status = decode_getfh(xdr, res->fh);
6954 if (status)
6955 goto out;
6956 if (res->renew)
6957 status = decode_renew(xdr);
6958 out:
6959 return status;
6960 }
6961
6962 #if defined(CONFIG_NFS_V4_1)
6963 /*
6964 * Decode BIND_CONN_TO_SESSION response
6965 */
6966 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6967 struct xdr_stream *xdr,
6968 void *res)
6969 {
6970 struct compound_hdr hdr;
6971 int status;
6972
6973 status = decode_compound_hdr(xdr, &hdr);
6974 if (!status)
6975 status = decode_bind_conn_to_session(xdr, res);
6976 return status;
6977 }
6978
6979 /*
6980 * Decode EXCHANGE_ID response
6981 */
6982 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6983 struct xdr_stream *xdr,
6984 void *res)
6985 {
6986 struct compound_hdr hdr;
6987 int status;
6988
6989 status = decode_compound_hdr(xdr, &hdr);
6990 if (!status)
6991 status = decode_exchange_id(xdr, res);
6992 return status;
6993 }
6994
6995 /*
6996 * Decode CREATE_SESSION response
6997 */
6998 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6999 struct xdr_stream *xdr,
7000 struct nfs41_create_session_res *res)
7001 {
7002 struct compound_hdr hdr;
7003 int status;
7004
7005 status = decode_compound_hdr(xdr, &hdr);
7006 if (!status)
7007 status = decode_create_session(xdr, res);
7008 return status;
7009 }
7010
7011 /*
7012 * Decode DESTROY_SESSION response
7013 */
7014 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7015 struct xdr_stream *xdr,
7016 void *res)
7017 {
7018 struct compound_hdr hdr;
7019 int status;
7020
7021 status = decode_compound_hdr(xdr, &hdr);
7022 if (!status)
7023 status = decode_destroy_session(xdr, res);
7024 return status;
7025 }
7026
7027 /*
7028 * Decode DESTROY_CLIENTID response
7029 */
7030 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7031 struct xdr_stream *xdr,
7032 void *res)
7033 {
7034 struct compound_hdr hdr;
7035 int status;
7036
7037 status = decode_compound_hdr(xdr, &hdr);
7038 if (!status)
7039 status = decode_destroy_clientid(xdr, res);
7040 return status;
7041 }
7042
7043 /*
7044 * Decode SEQUENCE response
7045 */
7046 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7047 struct xdr_stream *xdr,
7048 struct nfs4_sequence_res *res)
7049 {
7050 struct compound_hdr hdr;
7051 int status;
7052
7053 status = decode_compound_hdr(xdr, &hdr);
7054 if (!status)
7055 status = decode_sequence(xdr, res, rqstp);
7056 return status;
7057 }
7058
7059 /*
7060 * Decode GET_LEASE_TIME response
7061 */
7062 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7063 struct xdr_stream *xdr,
7064 struct nfs4_get_lease_time_res *res)
7065 {
7066 struct compound_hdr hdr;
7067 int status;
7068
7069 status = decode_compound_hdr(xdr, &hdr);
7070 if (!status)
7071 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7072 if (!status)
7073 status = decode_putrootfh(xdr);
7074 if (!status)
7075 status = decode_fsinfo(xdr, res->lr_fsinfo);
7076 return status;
7077 }
7078
7079 /*
7080 * Decode RECLAIM_COMPLETE response
7081 */
7082 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7083 struct xdr_stream *xdr,
7084 struct nfs41_reclaim_complete_res *res)
7085 {
7086 struct compound_hdr hdr;
7087 int status;
7088
7089 status = decode_compound_hdr(xdr, &hdr);
7090 if (!status)
7091 status = decode_sequence(xdr, &res->seq_res, rqstp);
7092 if (!status)
7093 status = decode_reclaim_complete(xdr, (void *)NULL);
7094 return status;
7095 }
7096
7097 /*
7098 * Decode GETDEVICELIST response
7099 */
7100 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7101 struct xdr_stream *xdr,
7102 struct nfs4_getdevicelist_res *res)
7103 {
7104 struct compound_hdr hdr;
7105 int status;
7106
7107 dprintk("encoding getdevicelist!\n");
7108
7109 status = decode_compound_hdr(xdr, &hdr);
7110 if (status != 0)
7111 goto out;
7112 status = decode_sequence(xdr, &res->seq_res, rqstp);
7113 if (status != 0)
7114 goto out;
7115 status = decode_putfh(xdr);
7116 if (status != 0)
7117 goto out;
7118 status = decode_getdevicelist(xdr, res->devlist);
7119 out:
7120 return status;
7121 }
7122
7123 /*
7124 * Decode GETDEVINFO response
7125 */
7126 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7127 struct xdr_stream *xdr,
7128 struct nfs4_getdeviceinfo_res *res)
7129 {
7130 struct compound_hdr hdr;
7131 int status;
7132
7133 status = decode_compound_hdr(xdr, &hdr);
7134 if (status != 0)
7135 goto out;
7136 status = decode_sequence(xdr, &res->seq_res, rqstp);
7137 if (status != 0)
7138 goto out;
7139 status = decode_getdeviceinfo(xdr, res->pdev);
7140 out:
7141 return status;
7142 }
7143
7144 /*
7145 * Decode LAYOUTGET response
7146 */
7147 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7148 struct xdr_stream *xdr,
7149 struct nfs4_layoutget_res *res)
7150 {
7151 struct compound_hdr hdr;
7152 int status;
7153
7154 status = decode_compound_hdr(xdr, &hdr);
7155 if (status)
7156 goto out;
7157 status = decode_sequence(xdr, &res->seq_res, rqstp);
7158 if (status)
7159 goto out;
7160 status = decode_putfh(xdr);
7161 if (status)
7162 goto out;
7163 status = decode_layoutget(xdr, rqstp, res);
7164 out:
7165 return status;
7166 }
7167
7168 /*
7169 * Decode LAYOUTRETURN response
7170 */
7171 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7172 struct xdr_stream *xdr,
7173 struct nfs4_layoutreturn_res *res)
7174 {
7175 struct compound_hdr hdr;
7176 int status;
7177
7178 status = decode_compound_hdr(xdr, &hdr);
7179 if (status)
7180 goto out;
7181 status = decode_sequence(xdr, &res->seq_res, rqstp);
7182 if (status)
7183 goto out;
7184 status = decode_putfh(xdr);
7185 if (status)
7186 goto out;
7187 status = decode_layoutreturn(xdr, res);
7188 out:
7189 return status;
7190 }
7191
7192 /*
7193 * Decode LAYOUTCOMMIT response
7194 */
7195 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7196 struct xdr_stream *xdr,
7197 struct nfs4_layoutcommit_res *res)
7198 {
7199 struct compound_hdr hdr;
7200 int status;
7201
7202 status = decode_compound_hdr(xdr, &hdr);
7203 if (status)
7204 goto out;
7205 status = decode_sequence(xdr, &res->seq_res, rqstp);
7206 if (status)
7207 goto out;
7208 status = decode_putfh(xdr);
7209 if (status)
7210 goto out;
7211 status = decode_layoutcommit(xdr, rqstp, res);
7212 if (status)
7213 goto out;
7214 decode_getfattr(xdr, res->fattr, res->server);
7215 out:
7216 return status;
7217 }
7218
7219 /*
7220 * Decode SECINFO_NO_NAME response
7221 */
7222 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7223 struct xdr_stream *xdr,
7224 struct nfs4_secinfo_res *res)
7225 {
7226 struct compound_hdr hdr;
7227 int status;
7228
7229 status = decode_compound_hdr(xdr, &hdr);
7230 if (status)
7231 goto out;
7232 status = decode_sequence(xdr, &res->seq_res, rqstp);
7233 if (status)
7234 goto out;
7235 status = decode_putrootfh(xdr);
7236 if (status)
7237 goto out;
7238 status = decode_secinfo_no_name(xdr, res);
7239 out:
7240 return status;
7241 }
7242
7243 /*
7244 * Decode TEST_STATEID response
7245 */
7246 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7247 struct xdr_stream *xdr,
7248 struct nfs41_test_stateid_res *res)
7249 {
7250 struct compound_hdr hdr;
7251 int status;
7252
7253 status = decode_compound_hdr(xdr, &hdr);
7254 if (status)
7255 goto out;
7256 status = decode_sequence(xdr, &res->seq_res, rqstp);
7257 if (status)
7258 goto out;
7259 status = decode_test_stateid(xdr, res);
7260 out:
7261 return status;
7262 }
7263
7264 /*
7265 * Decode FREE_STATEID response
7266 */
7267 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7268 struct xdr_stream *xdr,
7269 struct nfs41_free_stateid_res *res)
7270 {
7271 struct compound_hdr hdr;
7272 int status;
7273
7274 status = decode_compound_hdr(xdr, &hdr);
7275 if (status)
7276 goto out;
7277 status = decode_sequence(xdr, &res->seq_res, rqstp);
7278 if (status)
7279 goto out;
7280 status = decode_free_stateid(xdr, res);
7281 out:
7282 return status;
7283 }
7284 #endif /* CONFIG_NFS_V4_1 */
7285
7286 /**
7287 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7288 * the local page cache.
7289 * @xdr: XDR stream where entry resides
7290 * @entry: buffer to fill in with entry data
7291 * @plus: boolean indicating whether this should be a readdirplus entry
7292 *
7293 * Returns zero if successful, otherwise a negative errno value is
7294 * returned.
7295 *
7296 * This function is not invoked during READDIR reply decoding, but
7297 * rather whenever an application invokes the getdents(2) system call
7298 * on a directory already in our cache.
7299 */
7300 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7301 int plus)
7302 {
7303 unsigned int savep;
7304 uint32_t bitmap[3] = {0};
7305 uint32_t len;
7306 __be32 *p = xdr_inline_decode(xdr, 4);
7307 if (unlikely(!p))
7308 goto out_overflow;
7309 if (*p == xdr_zero) {
7310 p = xdr_inline_decode(xdr, 4);
7311 if (unlikely(!p))
7312 goto out_overflow;
7313 if (*p == xdr_zero)
7314 return -EAGAIN;
7315 entry->eof = 1;
7316 return -EBADCOOKIE;
7317 }
7318
7319 p = xdr_inline_decode(xdr, 12);
7320 if (unlikely(!p))
7321 goto out_overflow;
7322 entry->prev_cookie = entry->cookie;
7323 p = xdr_decode_hyper(p, &entry->cookie);
7324 entry->len = be32_to_cpup(p);
7325
7326 p = xdr_inline_decode(xdr, entry->len);
7327 if (unlikely(!p))
7328 goto out_overflow;
7329 entry->name = (const char *) p;
7330
7331 /*
7332 * In case the server doesn't return an inode number,
7333 * we fake one here. (We don't use inode number 0,
7334 * since glibc seems to choke on it...)
7335 */
7336 entry->ino = 1;
7337 entry->fattr->valid = 0;
7338
7339 if (decode_attr_bitmap(xdr, bitmap) < 0)
7340 goto out_overflow;
7341
7342 if (decode_attr_length(xdr, &len, &savep) < 0)
7343 goto out_overflow;
7344
7345 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7346 NULL, entry->label, entry->server) < 0)
7347 goto out_overflow;
7348 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7349 entry->ino = entry->fattr->mounted_on_fileid;
7350 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7351 entry->ino = entry->fattr->fileid;
7352
7353 entry->d_type = DT_UNKNOWN;
7354 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7355 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7356
7357 return 0;
7358
7359 out_overflow:
7360 print_overflow_msg(__func__, xdr);
7361 return -EAGAIN;
7362 }
7363
7364 /*
7365 * We need to translate between nfs status return values and
7366 * the local errno values which may not be the same.
7367 */
7368 static struct {
7369 int stat;
7370 int errno;
7371 } nfs_errtbl[] = {
7372 { NFS4_OK, 0 },
7373 { NFS4ERR_PERM, -EPERM },
7374 { NFS4ERR_NOENT, -ENOENT },
7375 { NFS4ERR_IO, -errno_NFSERR_IO},
7376 { NFS4ERR_NXIO, -ENXIO },
7377 { NFS4ERR_ACCESS, -EACCES },
7378 { NFS4ERR_EXIST, -EEXIST },
7379 { NFS4ERR_XDEV, -EXDEV },
7380 { NFS4ERR_NOTDIR, -ENOTDIR },
7381 { NFS4ERR_ISDIR, -EISDIR },
7382 { NFS4ERR_INVAL, -EINVAL },
7383 { NFS4ERR_FBIG, -EFBIG },
7384 { NFS4ERR_NOSPC, -ENOSPC },
7385 { NFS4ERR_ROFS, -EROFS },
7386 { NFS4ERR_MLINK, -EMLINK },
7387 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7388 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7389 { NFS4ERR_DQUOT, -EDQUOT },
7390 { NFS4ERR_STALE, -ESTALE },
7391 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7392 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7393 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7394 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7395 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7396 { NFS4ERR_BADTYPE, -EBADTYPE },
7397 { NFS4ERR_LOCKED, -EAGAIN },
7398 { NFS4ERR_SYMLINK, -ELOOP },
7399 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7400 { NFS4ERR_DEADLOCK, -EDEADLK },
7401 { -1, -EIO }
7402 };
7403
7404 /*
7405 * Convert an NFS error code to a local one.
7406 * This one is used jointly by NFSv2 and NFSv3.
7407 */
7408 static int
7409 nfs4_stat_to_errno(int stat)
7410 {
7411 int i;
7412 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7413 if (nfs_errtbl[i].stat == stat)
7414 return nfs_errtbl[i].errno;
7415 }
7416 if (stat <= 10000 || stat > 10100) {
7417 /* The server is looney tunes. */
7418 return -EREMOTEIO;
7419 }
7420 /* If we cannot translate the error, the recovery routines should
7421 * handle it.
7422 * Note: remaining NFSv4 error codes have values > 10000, so should
7423 * not conflict with native Linux error codes.
7424 */
7425 return -stat;
7426 }
7427
7428 #define PROC(proc, argtype, restype) \
7429 [NFSPROC4_CLNT_##proc] = { \
7430 .p_proc = NFSPROC4_COMPOUND, \
7431 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7432 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7433 .p_arglen = NFS4_##argtype##_sz, \
7434 .p_replen = NFS4_##restype##_sz, \
7435 .p_statidx = NFSPROC4_CLNT_##proc, \
7436 .p_name = #proc, \
7437 }
7438
7439 struct rpc_procinfo nfs4_procedures[] = {
7440 PROC(READ, enc_read, dec_read),
7441 PROC(WRITE, enc_write, dec_write),
7442 PROC(COMMIT, enc_commit, dec_commit),
7443 PROC(OPEN, enc_open, dec_open),
7444 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7445 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7446 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7447 PROC(CLOSE, enc_close, dec_close),
7448 PROC(SETATTR, enc_setattr, dec_setattr),
7449 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7450 PROC(RENEW, enc_renew, dec_renew),
7451 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7452 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7453 PROC(LOCK, enc_lock, dec_lock),
7454 PROC(LOCKT, enc_lockt, dec_lockt),
7455 PROC(LOCKU, enc_locku, dec_locku),
7456 PROC(ACCESS, enc_access, dec_access),
7457 PROC(GETATTR, enc_getattr, dec_getattr),
7458 PROC(LOOKUP, enc_lookup, dec_lookup),
7459 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7460 PROC(REMOVE, enc_remove, dec_remove),
7461 PROC(RENAME, enc_rename, dec_rename),
7462 PROC(LINK, enc_link, dec_link),
7463 PROC(SYMLINK, enc_symlink, dec_symlink),
7464 PROC(CREATE, enc_create, dec_create),
7465 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7466 PROC(STATFS, enc_statfs, dec_statfs),
7467 PROC(READLINK, enc_readlink, dec_readlink),
7468 PROC(READDIR, enc_readdir, dec_readdir),
7469 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7470 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7471 PROC(GETACL, enc_getacl, dec_getacl),
7472 PROC(SETACL, enc_setacl, dec_setacl),
7473 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7474 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7475 PROC(SECINFO, enc_secinfo, dec_secinfo),
7476 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7477 #if defined(CONFIG_NFS_V4_1)
7478 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7479 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7480 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7481 PROC(SEQUENCE, enc_sequence, dec_sequence),
7482 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7483 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7484 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7485 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7486 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7487 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7488 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7489 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7490 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7491 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7492 PROC(BIND_CONN_TO_SESSION,
7493 enc_bind_conn_to_session, dec_bind_conn_to_session),
7494 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7495 #endif /* CONFIG_NFS_V4_1 */
7496 };
7497
7498 const struct rpc_version nfs_version4 = {
7499 .number = 4,
7500 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7501 .procs = nfs4_procedures
7502 };
7503
7504 /*
7505 * Local variables:
7506 * c-basic-offset: 8
7507 * End:
7508 */
Linux kernel - Deliverables
This page took 0.474644 seconds and 5 git commands to generate.