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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-zesty-kernel.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 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
208 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
209 #define encode_write_maxsz (op_encode_hdr_maxsz + \
210 encode_stateid_maxsz + 4)
211 #define decode_write_maxsz (op_decode_hdr_maxsz + \
212 2 + decode_verifier_maxsz)
213 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
214 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
215 decode_verifier_maxsz)
216 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
217 nfs4_name_maxsz)
218 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
219 decode_change_info_maxsz)
220 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
221 2 * nfs4_name_maxsz)
222 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
223 decode_change_info_maxsz + \
224 decode_change_info_maxsz)
225 #define encode_link_maxsz (op_encode_hdr_maxsz + \
226 nfs4_name_maxsz)
227 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
228 #define encode_lockowner_maxsz (7)
229 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
230 7 + \
231 1 + encode_stateid_maxsz + 1 + \
232 encode_lockowner_maxsz)
233 #define decode_lock_denied_maxsz \
234 (8 + decode_lockowner_maxsz)
235 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
236 decode_lock_denied_maxsz)
237 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
238 encode_lockowner_maxsz)
239 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
240 decode_lock_denied_maxsz)
241 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
242 encode_stateid_maxsz + \
243 4)
244 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
245 decode_stateid_maxsz)
246 #define encode_release_lockowner_maxsz \
247 (op_encode_hdr_maxsz + \
248 encode_lockowner_maxsz)
249 #define decode_release_lockowner_maxsz \
250 (op_decode_hdr_maxsz)
251 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
252 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
253 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
254 1 + nfs4_name_maxsz + \
255 1 + \
256 nfs4_fattr_maxsz)
257 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
258 #define encode_create_maxsz (op_encode_hdr_maxsz + \
259 1 + 2 + nfs4_name_maxsz + \
260 encode_attrs_maxsz)
261 #define decode_create_maxsz (op_decode_hdr_maxsz + \
262 decode_change_info_maxsz + \
263 nfs4_fattr_bitmap_maxsz)
264 #define encode_statfs_maxsz (encode_getattr_maxsz)
265 #define decode_statfs_maxsz (decode_getattr_maxsz)
266 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
267 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
268 #define encode_getacl_maxsz (encode_getattr_maxsz)
269 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
270 nfs4_fattr_bitmap_maxsz + 1)
271 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
272 encode_stateid_maxsz + 3)
273 #define decode_setacl_maxsz (decode_setattr_maxsz)
274 #define encode_fs_locations_maxsz \
275 (encode_getattr_maxsz)
276 #define decode_fs_locations_maxsz \
277 (0)
278 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
279 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
280
281 #if defined(CONFIG_NFS_V4_1)
282 #define NFS4_MAX_MACHINE_NAME_LEN (64)
283 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
284 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
285
286 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
287 encode_verifier_maxsz + \
288 1 /* co_ownerid.len */ + \
289 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
290 1 /* flags */ + \
291 1 /* spa_how */ + \
292 /* max is SP4_MACH_CRED (for now) */ + \
293 1 + NFS4_OP_MAP_NUM_WORDS + \
294 1 + NFS4_OP_MAP_NUM_WORDS + \
295 1 /* implementation id array of size 1 */ + \
296 1 /* nii_domain */ + \
297 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
298 1 /* nii_name */ + \
299 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
300 3 /* nii_date */)
301 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
302 2 /* eir_clientid */ + \
303 1 /* eir_sequenceid */ + \
304 1 /* eir_flags */ + \
305 1 /* spr_how */ + \
306 /* max is SP4_MACH_CRED (for now) */ + \
307 1 + NFS4_OP_MAP_NUM_WORDS + \
308 1 + NFS4_OP_MAP_NUM_WORDS + \
309 2 /* eir_server_owner.so_minor_id */ + \
310 /* eir_server_owner.so_major_id<> */ \
311 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
312 /* eir_server_scope<> */ \
313 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
314 1 /* eir_server_impl_id array length */ + \
315 1 /* nii_domain */ + \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
317 1 /* nii_name */ + \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
319 3 /* nii_date */)
320 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
321 #define decode_channel_attrs_maxsz (6 + \
322 1 /* ca_rdma_ird.len */ + \
323 1 /* ca_rdma_ird */)
324 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
325 2 /* csa_clientid */ + \
326 1 /* csa_sequence */ + \
327 1 /* csa_flags */ + \
328 encode_channel_attrs_maxsz + \
329 encode_channel_attrs_maxsz + \
330 1 /* csa_cb_program */ + \
331 1 /* csa_sec_parms.len (1) */ + \
332 1 /* cb_secflavor (AUTH_SYS) */ + \
333 1 /* stamp */ + \
334 1 /* machinename.len */ + \
335 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
336 1 /* uid */ + \
337 1 /* gid */ + \
338 1 /* gids.len (0) */)
339 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
340 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
341 1 /* csr_sequence */ + \
342 1 /* csr_flags */ + \
343 decode_channel_attrs_maxsz + \
344 decode_channel_attrs_maxsz)
345 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
346 /* bctsa_sessid */ \
347 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
348 1 /* bctsa_dir */ + \
349 1 /* bctsa_use_conn_in_rdma_mode */)
350 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
351 /* bctsr_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsr_dir */ + \
354 1 /* bctsr_use_conn_in_rdma_mode */)
355 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
356 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
357 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
358 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
359 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
360 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
361 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
362 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
363 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
364 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
365 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
366 encode_verifier_maxsz)
367 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
368 2 /* nfs_cookie4 gdlr_cookie */ + \
369 decode_verifier_maxsz \
370 /* verifier4 gdlr_verifier */ + \
371 1 /* gdlr_deviceid_list count */ + \
372 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
373 NFS4_DEVICEID4_SIZE) \
374 /* gdlr_deviceid_list */ + \
375 1 /* bool gdlr_eof */)
376 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
377 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
378 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
379 1 /* layout type */ + \
380 1 /* opaque devaddr4 length */ + \
381 /* devaddr4 payload is read into page */ \
382 1 /* notification bitmap length */ + \
383 1 /* notification bitmap */)
384 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
385 encode_stateid_maxsz)
386 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
387 decode_stateid_maxsz + \
388 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
389 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
390 2 /* offset */ + \
391 2 /* length */ + \
392 1 /* reclaim */ + \
393 encode_stateid_maxsz + \
394 1 /* new offset (true) */ + \
395 2 /* last byte written */ + \
396 1 /* nt_timechanged (false) */ + \
397 1 /* layoutupdate4 layout type */ + \
398 1 /* NULL filelayout layoutupdate4 payload */)
399 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
400 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
401 encode_stateid_maxsz + \
402 1 /* FIXME: opaque lrf_body always empty at the moment */)
403 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
404 1 + decode_stateid_maxsz)
405 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
406 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
407 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
408 XDR_QUADLEN(NFS4_STATEID_SIZE))
409 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
410 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
411 XDR_QUADLEN(NFS4_STATEID_SIZE))
412 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
413 #else /* CONFIG_NFS_V4_1 */
414 #define encode_sequence_maxsz 0
415 #define decode_sequence_maxsz 0
416 #endif /* CONFIG_NFS_V4_1 */
417
418 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
419 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
420 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
421 encode_sequence_maxsz + \
422 encode_putfh_maxsz + \
423 encode_read_maxsz)
424 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
425 decode_sequence_maxsz + \
426 decode_putfh_maxsz + \
427 decode_read_maxsz)
428 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
429 encode_sequence_maxsz + \
430 encode_putfh_maxsz + \
431 encode_readlink_maxsz)
432 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
433 decode_sequence_maxsz + \
434 decode_putfh_maxsz + \
435 decode_readlink_maxsz)
436 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
437 encode_sequence_maxsz + \
438 encode_putfh_maxsz + \
439 encode_readdir_maxsz)
440 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
441 decode_sequence_maxsz + \
442 decode_putfh_maxsz + \
443 decode_readdir_maxsz)
444 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
445 encode_sequence_maxsz + \
446 encode_putfh_maxsz + \
447 encode_write_maxsz + \
448 encode_getattr_maxsz)
449 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
450 decode_sequence_maxsz + \
451 decode_putfh_maxsz + \
452 decode_write_maxsz + \
453 decode_getattr_maxsz)
454 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
455 encode_sequence_maxsz + \
456 encode_putfh_maxsz + \
457 encode_commit_maxsz)
458 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
459 decode_sequence_maxsz + \
460 decode_putfh_maxsz + \
461 decode_commit_maxsz)
462 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
463 encode_sequence_maxsz + \
464 encode_putfh_maxsz + \
465 encode_open_maxsz + \
466 encode_access_maxsz + \
467 encode_getfh_maxsz + \
468 encode_getattr_maxsz)
469 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
470 decode_sequence_maxsz + \
471 decode_putfh_maxsz + \
472 decode_open_maxsz + \
473 decode_access_maxsz + \
474 decode_getfh_maxsz + \
475 decode_getattr_maxsz)
476 #define NFS4_enc_open_confirm_sz \
477 (compound_encode_hdr_maxsz + \
478 encode_putfh_maxsz + \
479 encode_open_confirm_maxsz)
480 #define NFS4_dec_open_confirm_sz \
481 (compound_decode_hdr_maxsz + \
482 decode_putfh_maxsz + \
483 decode_open_confirm_maxsz)
484 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
485 encode_sequence_maxsz + \
486 encode_putfh_maxsz + \
487 encode_open_maxsz + \
488 encode_access_maxsz + \
489 encode_getattr_maxsz)
490 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
491 decode_sequence_maxsz + \
492 decode_putfh_maxsz + \
493 decode_open_maxsz + \
494 decode_access_maxsz + \
495 decode_getattr_maxsz)
496 #define NFS4_enc_open_downgrade_sz \
497 (compound_encode_hdr_maxsz + \
498 encode_sequence_maxsz + \
499 encode_putfh_maxsz + \
500 encode_open_downgrade_maxsz + \
501 encode_getattr_maxsz)
502 #define NFS4_dec_open_downgrade_sz \
503 (compound_decode_hdr_maxsz + \
504 decode_sequence_maxsz + \
505 decode_putfh_maxsz + \
506 decode_open_downgrade_maxsz + \
507 decode_getattr_maxsz)
508 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
509 encode_sequence_maxsz + \
510 encode_putfh_maxsz + \
511 encode_close_maxsz + \
512 encode_getattr_maxsz)
513 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
514 decode_sequence_maxsz + \
515 decode_putfh_maxsz + \
516 decode_close_maxsz + \
517 decode_getattr_maxsz)
518 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
519 encode_sequence_maxsz + \
520 encode_putfh_maxsz + \
521 encode_setattr_maxsz + \
522 encode_getattr_maxsz)
523 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
524 decode_sequence_maxsz + \
525 decode_putfh_maxsz + \
526 decode_setattr_maxsz + \
527 decode_getattr_maxsz)
528 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
529 encode_sequence_maxsz + \
530 encode_putfh_maxsz + \
531 encode_fsinfo_maxsz)
532 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
533 decode_sequence_maxsz + \
534 decode_putfh_maxsz + \
535 decode_fsinfo_maxsz)
536 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
537 encode_renew_maxsz)
538 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
539 decode_renew_maxsz)
540 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
541 encode_setclientid_maxsz)
542 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
543 decode_setclientid_maxsz)
544 #define NFS4_enc_setclientid_confirm_sz \
545 (compound_encode_hdr_maxsz + \
546 encode_setclientid_confirm_maxsz)
547 #define NFS4_dec_setclientid_confirm_sz \
548 (compound_decode_hdr_maxsz + \
549 decode_setclientid_confirm_maxsz)
550 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
551 encode_sequence_maxsz + \
552 encode_putfh_maxsz + \
553 encode_lock_maxsz)
554 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
555 decode_sequence_maxsz + \
556 decode_putfh_maxsz + \
557 decode_lock_maxsz)
558 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
559 encode_sequence_maxsz + \
560 encode_putfh_maxsz + \
561 encode_lockt_maxsz)
562 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
563 decode_sequence_maxsz + \
564 decode_putfh_maxsz + \
565 decode_lockt_maxsz)
566 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
567 encode_sequence_maxsz + \
568 encode_putfh_maxsz + \
569 encode_locku_maxsz)
570 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
571 decode_sequence_maxsz + \
572 decode_putfh_maxsz + \
573 decode_locku_maxsz)
574 #define NFS4_enc_release_lockowner_sz \
575 (compound_encode_hdr_maxsz + \
576 encode_lockowner_maxsz)
577 #define NFS4_dec_release_lockowner_sz \
578 (compound_decode_hdr_maxsz + \
579 decode_lockowner_maxsz)
580 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
581 encode_sequence_maxsz + \
582 encode_putfh_maxsz + \
583 encode_access_maxsz + \
584 encode_getattr_maxsz)
585 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
586 decode_sequence_maxsz + \
587 decode_putfh_maxsz + \
588 decode_access_maxsz + \
589 decode_getattr_maxsz)
590 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
591 encode_sequence_maxsz + \
592 encode_putfh_maxsz + \
593 encode_getattr_maxsz + \
594 encode_renew_maxsz)
595 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
596 decode_sequence_maxsz + \
597 decode_putfh_maxsz + \
598 decode_getattr_maxsz + \
599 decode_renew_maxsz)
600 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
601 encode_sequence_maxsz + \
602 encode_putfh_maxsz + \
603 encode_lookup_maxsz + \
604 encode_getattr_maxsz + \
605 encode_getfh_maxsz)
606 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
607 decode_sequence_maxsz + \
608 decode_putfh_maxsz + \
609 decode_lookup_maxsz + \
610 decode_getattr_maxsz + \
611 decode_getfh_maxsz)
612 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
613 encode_sequence_maxsz + \
614 encode_putrootfh_maxsz + \
615 encode_getattr_maxsz + \
616 encode_getfh_maxsz)
617 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
618 decode_sequence_maxsz + \
619 decode_putrootfh_maxsz + \
620 decode_getattr_maxsz + \
621 decode_getfh_maxsz)
622 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
623 encode_sequence_maxsz + \
624 encode_putfh_maxsz + \
625 encode_remove_maxsz)
626 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
627 decode_sequence_maxsz + \
628 decode_putfh_maxsz + \
629 decode_remove_maxsz)
630 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
631 encode_sequence_maxsz + \
632 encode_putfh_maxsz + \
633 encode_savefh_maxsz + \
634 encode_putfh_maxsz + \
635 encode_rename_maxsz)
636 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
637 decode_sequence_maxsz + \
638 decode_putfh_maxsz + \
639 decode_savefh_maxsz + \
640 decode_putfh_maxsz + \
641 decode_rename_maxsz)
642 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
643 encode_sequence_maxsz + \
644 encode_putfh_maxsz + \
645 encode_savefh_maxsz + \
646 encode_putfh_maxsz + \
647 encode_link_maxsz + \
648 encode_restorefh_maxsz + \
649 encode_getattr_maxsz)
650 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
651 decode_sequence_maxsz + \
652 decode_putfh_maxsz + \
653 decode_savefh_maxsz + \
654 decode_putfh_maxsz + \
655 decode_link_maxsz + \
656 decode_restorefh_maxsz + \
657 decode_getattr_maxsz)
658 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
659 encode_sequence_maxsz + \
660 encode_putfh_maxsz + \
661 encode_symlink_maxsz + \
662 encode_getattr_maxsz + \
663 encode_getfh_maxsz)
664 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
665 decode_sequence_maxsz + \
666 decode_putfh_maxsz + \
667 decode_symlink_maxsz + \
668 decode_getattr_maxsz + \
669 decode_getfh_maxsz)
670 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
671 encode_sequence_maxsz + \
672 encode_putfh_maxsz + \
673 encode_create_maxsz + \
674 encode_getfh_maxsz + \
675 encode_getattr_maxsz)
676 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
677 decode_sequence_maxsz + \
678 decode_putfh_maxsz + \
679 decode_create_maxsz + \
680 decode_getfh_maxsz + \
681 decode_getattr_maxsz)
682 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
683 encode_sequence_maxsz + \
684 encode_putfh_maxsz + \
685 encode_getattr_maxsz)
686 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
687 decode_sequence_maxsz + \
688 decode_putfh_maxsz + \
689 decode_getattr_maxsz)
690 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
691 encode_sequence_maxsz + \
692 encode_putfh_maxsz + \
693 encode_statfs_maxsz)
694 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
695 decode_sequence_maxsz + \
696 decode_putfh_maxsz + \
697 decode_statfs_maxsz)
698 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
699 encode_sequence_maxsz + \
700 encode_putfh_maxsz + \
701 encode_getattr_maxsz)
702 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
703 decode_sequence_maxsz + \
704 decode_putfh_maxsz + \
705 decode_getattr_maxsz)
706 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
707 encode_sequence_maxsz + \
708 encode_putfh_maxsz + \
709 encode_delegreturn_maxsz + \
710 encode_getattr_maxsz)
711 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
712 decode_sequence_maxsz + \
713 decode_delegreturn_maxsz + \
714 decode_getattr_maxsz)
715 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
716 encode_sequence_maxsz + \
717 encode_putfh_maxsz + \
718 encode_getacl_maxsz)
719 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_putfh_maxsz + \
722 decode_getacl_maxsz)
723 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
724 encode_sequence_maxsz + \
725 encode_putfh_maxsz + \
726 encode_setacl_maxsz)
727 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
728 decode_sequence_maxsz + \
729 decode_putfh_maxsz + \
730 decode_setacl_maxsz)
731 #define NFS4_enc_fs_locations_sz \
732 (compound_encode_hdr_maxsz + \
733 encode_sequence_maxsz + \
734 encode_putfh_maxsz + \
735 encode_lookup_maxsz + \
736 encode_fs_locations_maxsz + \
737 encode_renew_maxsz)
738 #define NFS4_dec_fs_locations_sz \
739 (compound_decode_hdr_maxsz + \
740 decode_sequence_maxsz + \
741 decode_putfh_maxsz + \
742 decode_lookup_maxsz + \
743 decode_fs_locations_maxsz + \
744 decode_renew_maxsz)
745 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_secinfo_maxsz)
749 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_secinfo_maxsz)
753 #define NFS4_enc_fsid_present_sz \
754 (compound_encode_hdr_maxsz + \
755 encode_sequence_maxsz + \
756 encode_putfh_maxsz + \
757 encode_getfh_maxsz + \
758 encode_renew_maxsz)
759 #define NFS4_dec_fsid_present_sz \
760 (compound_decode_hdr_maxsz + \
761 decode_sequence_maxsz + \
762 decode_putfh_maxsz + \
763 decode_getfh_maxsz + \
764 decode_renew_maxsz)
765 #if defined(CONFIG_NFS_V4_1)
766 #define NFS4_enc_bind_conn_to_session_sz \
767 (compound_encode_hdr_maxsz + \
768 encode_bind_conn_to_session_maxsz)
769 #define NFS4_dec_bind_conn_to_session_sz \
770 (compound_decode_hdr_maxsz + \
771 decode_bind_conn_to_session_maxsz)
772 #define NFS4_enc_exchange_id_sz \
773 (compound_encode_hdr_maxsz + \
774 encode_exchange_id_maxsz)
775 #define NFS4_dec_exchange_id_sz \
776 (compound_decode_hdr_maxsz + \
777 decode_exchange_id_maxsz)
778 #define NFS4_enc_create_session_sz \
779 (compound_encode_hdr_maxsz + \
780 encode_create_session_maxsz)
781 #define NFS4_dec_create_session_sz \
782 (compound_decode_hdr_maxsz + \
783 decode_create_session_maxsz)
784 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
785 encode_destroy_session_maxsz)
786 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
787 decode_destroy_session_maxsz)
788 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
789 encode_destroy_clientid_maxsz)
790 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
791 decode_destroy_clientid_maxsz)
792 #define NFS4_enc_sequence_sz \
793 (compound_decode_hdr_maxsz + \
794 encode_sequence_maxsz)
795 #define NFS4_dec_sequence_sz \
796 (compound_decode_hdr_maxsz + \
797 decode_sequence_maxsz)
798 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
799 encode_sequence_maxsz + \
800 encode_putrootfh_maxsz + \
801 encode_fsinfo_maxsz)
802 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
803 decode_sequence_maxsz + \
804 decode_putrootfh_maxsz + \
805 decode_fsinfo_maxsz)
806 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
807 encode_sequence_maxsz + \
808 encode_reclaim_complete_maxsz)
809 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
810 decode_sequence_maxsz + \
811 decode_reclaim_complete_maxsz)
812 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
813 encode_sequence_maxsz + \
814 encode_putfh_maxsz + \
815 encode_getdevicelist_maxsz)
816 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
817 decode_sequence_maxsz + \
818 decode_putfh_maxsz + \
819 decode_getdevicelist_maxsz)
820 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
821 encode_sequence_maxsz +\
822 encode_getdeviceinfo_maxsz)
823 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
824 decode_sequence_maxsz + \
825 decode_getdeviceinfo_maxsz)
826 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
827 encode_sequence_maxsz + \
828 encode_putfh_maxsz + \
829 encode_layoutget_maxsz)
830 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
831 decode_sequence_maxsz + \
832 decode_putfh_maxsz + \
833 decode_layoutget_maxsz)
834 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
835 encode_sequence_maxsz +\
836 encode_putfh_maxsz + \
837 encode_layoutcommit_maxsz + \
838 encode_getattr_maxsz)
839 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
840 decode_sequence_maxsz + \
841 decode_putfh_maxsz + \
842 decode_layoutcommit_maxsz + \
843 decode_getattr_maxsz)
844 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
845 encode_sequence_maxsz + \
846 encode_putfh_maxsz + \
847 encode_layoutreturn_maxsz)
848 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
849 decode_sequence_maxsz + \
850 decode_putfh_maxsz + \
851 decode_layoutreturn_maxsz)
852 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
853 encode_sequence_maxsz + \
854 encode_putrootfh_maxsz +\
855 encode_secinfo_no_name_maxsz)
856 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
857 decode_sequence_maxsz + \
858 decode_putrootfh_maxsz + \
859 decode_secinfo_no_name_maxsz)
860 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
861 encode_sequence_maxsz + \
862 encode_test_stateid_maxsz)
863 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
864 decode_sequence_maxsz + \
865 decode_test_stateid_maxsz)
866 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
867 encode_sequence_maxsz + \
868 encode_free_stateid_maxsz)
869 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
870 decode_sequence_maxsz + \
871 decode_free_stateid_maxsz)
872
873 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
874 compound_encode_hdr_maxsz +
875 encode_sequence_maxsz +
876 encode_putfh_maxsz +
877 encode_getattr_maxsz) *
878 XDR_UNIT);
879
880 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
881 compound_decode_hdr_maxsz +
882 decode_sequence_maxsz +
883 decode_putfh_maxsz) *
884 XDR_UNIT);
885
886 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
887 compound_decode_hdr_maxsz +
888 decode_sequence_maxsz) *
889 XDR_UNIT);
890 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
891 #endif /* CONFIG_NFS_V4_1 */
892
893 static const umode_t nfs_type2fmt[] = {
894 [NF4BAD] = 0,
895 [NF4REG] = S_IFREG,
896 [NF4DIR] = S_IFDIR,
897 [NF4BLK] = S_IFBLK,
898 [NF4CHR] = S_IFCHR,
899 [NF4LNK] = S_IFLNK,
900 [NF4SOCK] = S_IFSOCK,
901 [NF4FIFO] = S_IFIFO,
902 [NF4ATTRDIR] = 0,
903 [NF4NAMEDATTR] = 0,
904 };
905
906 struct compound_hdr {
907 int32_t status;
908 uint32_t nops;
909 __be32 * nops_p;
910 uint32_t taglen;
911 char * tag;
912 uint32_t replen; /* expected reply words */
913 u32 minorversion;
914 };
915
916 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
917 {
918 __be32 *p = xdr_reserve_space(xdr, nbytes);
919 BUG_ON(!p);
920 return p;
921 }
922
923 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
924 {
925 __be32 *p;
926
927 p = xdr_reserve_space(xdr, len);
928 xdr_encode_opaque_fixed(p, buf, len);
929 }
930
931 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
932 {
933 __be32 *p;
934
935 p = reserve_space(xdr, 4 + len);
936 xdr_encode_opaque(p, str, len);
937 }
938
939 static void encode_uint32(struct xdr_stream *xdr, u32 n)
940 {
941 __be32 *p;
942
943 p = reserve_space(xdr, 4);
944 *p = cpu_to_be32(n);
945 }
946
947 static void encode_uint64(struct xdr_stream *xdr, u64 n)
948 {
949 __be32 *p;
950
951 p = reserve_space(xdr, 8);
952 xdr_encode_hyper(p, n);
953 }
954
955 static void encode_nfs4_seqid(struct xdr_stream *xdr,
956 const struct nfs_seqid *seqid)
957 {
958 encode_uint32(xdr, seqid->sequence->counter);
959 }
960
961 static void encode_compound_hdr(struct xdr_stream *xdr,
962 struct rpc_rqst *req,
963 struct compound_hdr *hdr)
964 {
965 __be32 *p;
966 struct rpc_auth *auth = req->rq_cred->cr_auth;
967
968 /* initialize running count of expected bytes in reply.
969 * NOTE: the replied tag SHOULD be the same is the one sent,
970 * but this is not required as a MUST for the server to do so. */
971 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
972
973 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
974 encode_string(xdr, hdr->taglen, hdr->tag);
975 p = reserve_space(xdr, 8);
976 *p++ = cpu_to_be32(hdr->minorversion);
977 hdr->nops_p = p;
978 *p = cpu_to_be32(hdr->nops);
979 }
980
981 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
982 uint32_t replen,
983 struct compound_hdr *hdr)
984 {
985 encode_uint32(xdr, op);
986 hdr->nops++;
987 hdr->replen += replen;
988 }
989
990 static void encode_nops(struct compound_hdr *hdr)
991 {
992 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
993 *hdr->nops_p = htonl(hdr->nops);
994 }
995
996 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
997 {
998 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
999 }
1000
1001 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1002 {
1003 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1004 }
1005
1006 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1007 const struct nfs4_label *label,
1008 const struct nfs_server *server)
1009 {
1010 char owner_name[IDMAP_NAMESZ];
1011 char owner_group[IDMAP_NAMESZ];
1012 int owner_namelen = 0;
1013 int owner_grouplen = 0;
1014 __be32 *p;
1015 unsigned i;
1016 uint32_t len = 0;
1017 uint32_t bmval_len;
1018 uint32_t bmval[3] = { 0 };
1019
1020 /*
1021 * We reserve enough space to write the entire attribute buffer at once.
1022 * In the worst-case, this would be
1023 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1024 * = 40 bytes, plus any contribution from variable-length fields
1025 * such as owner/group.
1026 */
1027 if (iap->ia_valid & ATTR_SIZE) {
1028 bmval[0] |= FATTR4_WORD0_SIZE;
1029 len += 8;
1030 }
1031 if (iap->ia_valid & ATTR_MODE) {
1032 bmval[1] |= FATTR4_WORD1_MODE;
1033 len += 4;
1034 }
1035 if (iap->ia_valid & ATTR_UID) {
1036 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1037 if (owner_namelen < 0) {
1038 dprintk("nfs: couldn't resolve uid %d to string\n",
1039 from_kuid(&init_user_ns, iap->ia_uid));
1040 /* XXX */
1041 strcpy(owner_name, "nobody");
1042 owner_namelen = sizeof("nobody") - 1;
1043 /* goto out; */
1044 }
1045 bmval[1] |= FATTR4_WORD1_OWNER;
1046 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1047 }
1048 if (iap->ia_valid & ATTR_GID) {
1049 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1050 if (owner_grouplen < 0) {
1051 dprintk("nfs: couldn't resolve gid %d to string\n",
1052 from_kgid(&init_user_ns, iap->ia_gid));
1053 strcpy(owner_group, "nobody");
1054 owner_grouplen = sizeof("nobody") - 1;
1055 /* goto out; */
1056 }
1057 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1058 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1059 }
1060 if (iap->ia_valid & ATTR_ATIME_SET) {
1061 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1062 len += 16;
1063 } else if (iap->ia_valid & ATTR_ATIME) {
1064 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065 len += 4;
1066 }
1067 if (iap->ia_valid & ATTR_MTIME_SET) {
1068 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1069 len += 16;
1070 } else if (iap->ia_valid & ATTR_MTIME) {
1071 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1072 len += 4;
1073 }
1074 if (label) {
1075 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1076 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1077 }
1078
1079 if (bmval[2] != 0)
1080 bmval_len = 3;
1081 else if (bmval[1] != 0)
1082 bmval_len = 2;
1083 else
1084 bmval_len = 1;
1085
1086 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1087
1088 *p++ = cpu_to_be32(bmval_len);
1089 for (i = 0; i < bmval_len; i++)
1090 *p++ = cpu_to_be32(bmval[i]);
1091 *p++ = cpu_to_be32(len);
1092
1093 if (bmval[0] & FATTR4_WORD0_SIZE)
1094 p = xdr_encode_hyper(p, iap->ia_size);
1095 if (bmval[1] & FATTR4_WORD1_MODE)
1096 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1097 if (bmval[1] & FATTR4_WORD1_OWNER)
1098 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1099 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1100 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1101 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1102 if (iap->ia_valid & ATTR_ATIME_SET) {
1103 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1104 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1105 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1106 } else
1107 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1108 }
1109 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1110 if (iap->ia_valid & ATTR_MTIME_SET) {
1111 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1112 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1113 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1114 } else
1115 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1116 }
1117 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1118 *p++ = cpu_to_be32(label->lfs);
1119 *p++ = cpu_to_be32(label->pi);
1120 *p++ = cpu_to_be32(label->len);
1121 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1122 }
1123
1124 /* out: */
1125 }
1126
1127 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1128 {
1129 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1130 encode_uint32(xdr, access);
1131 }
1132
1133 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1134 {
1135 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1136 encode_nfs4_seqid(xdr, arg->seqid);
1137 encode_nfs4_stateid(xdr, arg->stateid);
1138 }
1139
1140 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1141 {
1142 __be32 *p;
1143
1144 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1145 p = reserve_space(xdr, 12);
1146 p = xdr_encode_hyper(p, args->offset);
1147 *p = cpu_to_be32(args->count);
1148 }
1149
1150 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1151 {
1152 __be32 *p;
1153
1154 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1155 encode_uint32(xdr, create->ftype);
1156
1157 switch (create->ftype) {
1158 case NF4LNK:
1159 p = reserve_space(xdr, 4);
1160 *p = cpu_to_be32(create->u.symlink.len);
1161 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1162 break;
1163
1164 case NF4BLK: case NF4CHR:
1165 p = reserve_space(xdr, 8);
1166 *p++ = cpu_to_be32(create->u.device.specdata1);
1167 *p = cpu_to_be32(create->u.device.specdata2);
1168 break;
1169
1170 default:
1171 break;
1172 }
1173
1174 encode_string(xdr, create->name->len, create->name->name);
1175 encode_attrs(xdr, create->attrs, create->label, create->server);
1176 }
1177
1178 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1179 {
1180 __be32 *p;
1181
1182 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1183 p = reserve_space(xdr, 8);
1184 *p++ = cpu_to_be32(1);
1185 *p = cpu_to_be32(bitmap);
1186 }
1187
1188 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1189 {
1190 __be32 *p;
1191
1192 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1193 p = reserve_space(xdr, 12);
1194 *p++ = cpu_to_be32(2);
1195 *p++ = cpu_to_be32(bm0);
1196 *p = cpu_to_be32(bm1);
1197 }
1198
1199 static void
1200 encode_getattr_three(struct xdr_stream *xdr,
1201 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1202 struct compound_hdr *hdr)
1203 {
1204 __be32 *p;
1205
1206 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1207 if (bm2) {
1208 p = reserve_space(xdr, 16);
1209 *p++ = cpu_to_be32(3);
1210 *p++ = cpu_to_be32(bm0);
1211 *p++ = cpu_to_be32(bm1);
1212 *p = cpu_to_be32(bm2);
1213 } else if (bm1) {
1214 p = reserve_space(xdr, 12);
1215 *p++ = cpu_to_be32(2);
1216 *p++ = cpu_to_be32(bm0);
1217 *p = cpu_to_be32(bm1);
1218 } else {
1219 p = reserve_space(xdr, 8);
1220 *p++ = cpu_to_be32(1);
1221 *p = cpu_to_be32(bm0);
1222 }
1223 }
1224
1225 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1226 {
1227 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1228 bitmask[1] & nfs4_fattr_bitmap[1],
1229 bitmask[2] & nfs4_fattr_bitmap[2],
1230 hdr);
1231 }
1232
1233 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1234 const u32 *open_bitmap,
1235 struct compound_hdr *hdr)
1236 {
1237 encode_getattr_three(xdr,
1238 bitmask[0] & open_bitmap[0],
1239 bitmask[1] & open_bitmap[1],
1240 bitmask[2] & open_bitmap[2],
1241 hdr);
1242 }
1243
1244 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1245 {
1246 encode_getattr_three(xdr,
1247 bitmask[0] & nfs4_fsinfo_bitmap[0],
1248 bitmask[1] & nfs4_fsinfo_bitmap[1],
1249 bitmask[2] & nfs4_fsinfo_bitmap[2],
1250 hdr);
1251 }
1252
1253 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1254 {
1255 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1256 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1257 }
1258
1259 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1260 {
1261 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1262 }
1263
1264 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1265 {
1266 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1267 encode_string(xdr, name->len, name->name);
1268 }
1269
1270 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1271 {
1272 if (fl->fl_type == F_RDLCK)
1273 return block ? NFS4_READW_LT : NFS4_READ_LT;
1274 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1275 }
1276
1277 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1278 {
1279 if (fl->fl_end == OFFSET_MAX)
1280 return ~(uint64_t)0;
1281 return fl->fl_end - fl->fl_start + 1;
1282 }
1283
1284 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1285 {
1286 __be32 *p;
1287
1288 p = reserve_space(xdr, 32);
1289 p = xdr_encode_hyper(p, lowner->clientid);
1290 *p++ = cpu_to_be32(20);
1291 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1292 *p++ = cpu_to_be32(lowner->s_dev);
1293 xdr_encode_hyper(p, lowner->id);
1294 }
1295
1296 /*
1297 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1298 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1299 */
1300 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1301 {
1302 __be32 *p;
1303
1304 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1305 p = reserve_space(xdr, 28);
1306 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1307 *p++ = cpu_to_be32(args->reclaim);
1308 p = xdr_encode_hyper(p, args->fl->fl_start);
1309 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1310 *p = cpu_to_be32(args->new_lock_owner);
1311 if (args->new_lock_owner){
1312 encode_nfs4_seqid(xdr, args->open_seqid);
1313 encode_nfs4_stateid(xdr, args->open_stateid);
1314 encode_nfs4_seqid(xdr, args->lock_seqid);
1315 encode_lockowner(xdr, &args->lock_owner);
1316 }
1317 else {
1318 encode_nfs4_stateid(xdr, args->lock_stateid);
1319 encode_nfs4_seqid(xdr, args->lock_seqid);
1320 }
1321 }
1322
1323 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1324 {
1325 __be32 *p;
1326
1327 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1328 p = reserve_space(xdr, 20);
1329 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1330 p = xdr_encode_hyper(p, args->fl->fl_start);
1331 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1332 encode_lockowner(xdr, &args->lock_owner);
1333 }
1334
1335 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1336 {
1337 __be32 *p;
1338
1339 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1340 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1341 encode_nfs4_seqid(xdr, args->seqid);
1342 encode_nfs4_stateid(xdr, args->stateid);
1343 p = reserve_space(xdr, 16);
1344 p = xdr_encode_hyper(p, args->fl->fl_start);
1345 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1346 }
1347
1348 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1349 {
1350 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1351 encode_lockowner(xdr, lowner);
1352 }
1353
1354 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1355 {
1356 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1357 encode_string(xdr, name->len, name->name);
1358 }
1359
1360 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1361 {
1362 __be32 *p;
1363
1364 p = reserve_space(xdr, 8);
1365 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1366 case FMODE_READ:
1367 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1368 break;
1369 case FMODE_WRITE:
1370 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1371 break;
1372 case FMODE_READ|FMODE_WRITE:
1373 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1374 break;
1375 default:
1376 *p++ = cpu_to_be32(0);
1377 }
1378 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1379 }
1380
1381 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1382 {
1383 __be32 *p;
1384 /*
1385 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1386 * owner 4 = 32
1387 */
1388 encode_nfs4_seqid(xdr, arg->seqid);
1389 encode_share_access(xdr, arg->fmode);
1390 p = reserve_space(xdr, 36);
1391 p = xdr_encode_hyper(p, arg->clientid);
1392 *p++ = cpu_to_be32(24);
1393 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1394 *p++ = cpu_to_be32(arg->server->s_dev);
1395 *p++ = cpu_to_be32(arg->id.uniquifier);
1396 xdr_encode_hyper(p, arg->id.create_time);
1397 }
1398
1399 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401 struct iattr dummy;
1402 __be32 *p;
1403
1404 p = reserve_space(xdr, 4);
1405 switch(arg->createmode) {
1406 case NFS4_CREATE_UNCHECKED:
1407 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1408 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1409 break;
1410 case NFS4_CREATE_GUARDED:
1411 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1412 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1413 break;
1414 case NFS4_CREATE_EXCLUSIVE:
1415 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1416 encode_nfs4_verifier(xdr, &arg->u.verifier);
1417 break;
1418 case NFS4_CREATE_EXCLUSIVE4_1:
1419 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1420 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421 dummy.ia_valid = 0;
1422 encode_attrs(xdr, &dummy, arg->label, arg->server);
1423 }
1424 }
1425
1426 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1427 {
1428 __be32 *p;
1429
1430 p = reserve_space(xdr, 4);
1431 switch (arg->open_flags & O_CREAT) {
1432 case 0:
1433 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1434 break;
1435 default:
1436 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1437 encode_createmode(xdr, arg);
1438 }
1439 }
1440
1441 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1442 {
1443 __be32 *p;
1444
1445 p = reserve_space(xdr, 4);
1446 switch (delegation_type) {
1447 case 0:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1449 break;
1450 case FMODE_READ:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1452 break;
1453 case FMODE_WRITE|FMODE_READ:
1454 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1455 break;
1456 default:
1457 BUG();
1458 }
1459 }
1460
1461 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1462 {
1463 __be32 *p;
1464
1465 p = reserve_space(xdr, 4);
1466 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1467 encode_string(xdr, name->len, name->name);
1468 }
1469
1470 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1471 {
1472 __be32 *p;
1473
1474 p = reserve_space(xdr, 4);
1475 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1476 encode_delegation_type(xdr, type);
1477 }
1478
1479 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1485 encode_nfs4_stateid(xdr, stateid);
1486 encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_fh(struct xdr_stream *xdr)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4);
1494 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1495 }
1496
1497 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1503 encode_nfs4_stateid(xdr, stateid);
1504 }
1505
1506 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1507 {
1508 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1509 encode_openhdr(xdr, arg);
1510 encode_opentype(xdr, arg);
1511 switch (arg->claim) {
1512 case NFS4_OPEN_CLAIM_NULL:
1513 encode_claim_null(xdr, arg->name);
1514 break;
1515 case NFS4_OPEN_CLAIM_PREVIOUS:
1516 encode_claim_previous(xdr, arg->u.delegation_type);
1517 break;
1518 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1519 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1520 break;
1521 case NFS4_OPEN_CLAIM_FH:
1522 encode_claim_fh(xdr);
1523 break;
1524 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1525 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1526 break;
1527 default:
1528 BUG();
1529 }
1530 }
1531
1532 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1533 {
1534 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1535 encode_nfs4_stateid(xdr, arg->stateid);
1536 encode_nfs4_seqid(xdr, arg->seqid);
1537 }
1538
1539 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1540 {
1541 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1542 encode_nfs4_stateid(xdr, arg->stateid);
1543 encode_nfs4_seqid(xdr, arg->seqid);
1544 encode_share_access(xdr, arg->fmode);
1545 }
1546
1547 static void
1548 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1549 {
1550 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1551 encode_string(xdr, fh->size, fh->data);
1552 }
1553
1554 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1555 {
1556 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1557 }
1558
1559 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1560 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_pgio_args *args,
1706 struct compound_hdr *hdr)
1707 {
1708 __be32 *p;
1709
1710 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1711 encode_nfs4_stateid(xdr, &args->stateid);
1712
1713 p = reserve_space(xdr, 16);
1714 p = xdr_encode_hyper(p, args->offset);
1715 *p++ = cpu_to_be32(args->stable);
1716 *p = cpu_to_be32(args->count);
1717
1718 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1719 }
1720
1721 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1722 {
1723 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1724 encode_nfs4_stateid(xdr, stateid);
1725 }
1726
1727 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1728 {
1729 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1730 encode_string(xdr, name->len, name->name);
1731 }
1732
1733 #if defined(CONFIG_NFS_V4_1)
1734 /* NFSv4.1 operations */
1735 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1736 struct nfs4_session *session,
1737 struct compound_hdr *hdr)
1738 {
1739 __be32 *p;
1740
1741 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1742 decode_bind_conn_to_session_maxsz, hdr);
1743 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1744 p = xdr_reserve_space(xdr, 8);
1745 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1746 *p = 0; /* use_conn_in_rdma_mode = False */
1747 }
1748
1749 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1750 {
1751 unsigned int i;
1752 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1753 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1754 encode_uint32(xdr, op_map->u.words[i]);
1755 }
1756
1757 static void encode_exchange_id(struct xdr_stream *xdr,
1758 struct nfs41_exchange_id_args *args,
1759 struct compound_hdr *hdr)
1760 {
1761 __be32 *p;
1762 char impl_name[IMPL_NAME_LIMIT];
1763 int len = 0;
1764
1765 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1766 encode_nfs4_verifier(xdr, args->verifier);
1767
1768 encode_string(xdr, args->id_len, args->id);
1769
1770 encode_uint32(xdr, args->flags);
1771 encode_uint32(xdr, args->state_protect.how);
1772
1773 switch (args->state_protect.how) {
1774 case SP4_NONE:
1775 break;
1776 case SP4_MACH_CRED:
1777 encode_op_map(xdr, &args->state_protect.enforce);
1778 encode_op_map(xdr, &args->state_protect.allow);
1779 break;
1780 default:
1781 WARN_ON_ONCE(1);
1782 break;
1783 }
1784
1785 if (send_implementation_id &&
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1787 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1788 <= sizeof(impl_name) + 1)
1789 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1790 utsname()->sysname, utsname()->release,
1791 utsname()->version, utsname()->machine);
1792
1793 if (len > 0) {
1794 encode_uint32(xdr, 1); /* implementation id array length=1 */
1795
1796 encode_string(xdr,
1797 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1798 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1799 encode_string(xdr, len, impl_name);
1800 /* just send zeros for nii_date - the date is in nii_name */
1801 p = reserve_space(xdr, 12);
1802 p = xdr_encode_hyper(p, 0);
1803 *p = cpu_to_be32(0);
1804 } else
1805 encode_uint32(xdr, 0); /* implementation id array length=0 */
1806 }
1807
1808 static void encode_create_session(struct xdr_stream *xdr,
1809 struct nfs41_create_session_args *args,
1810 struct compound_hdr *hdr)
1811 {
1812 __be32 *p;
1813 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1814 uint32_t len;
1815 struct nfs_client *clp = args->client;
1816 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1817 u32 max_resp_sz_cached;
1818
1819 /*
1820 * Assumes OPEN is the biggest non-idempotent compound.
1821 * 2 is the verifier.
1822 */
1823 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1824 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1825
1826 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1827 clp->cl_ipaddr);
1828
1829 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1830 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1831 p = xdr_encode_hyper(p, clp->cl_clientid);
1832 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1833 *p++ = cpu_to_be32(args->flags); /*flags */
1834
1835 /* Fore Channel */
1836 *p++ = cpu_to_be32(0); /* header padding size */
1837 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1838 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1839 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1840 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1841 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1842 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1843
1844 /* Back Channel */
1845 *p++ = cpu_to_be32(0); /* header padding size */
1846 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1847 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1848 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1849 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1850 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1851 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1852
1853 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1854 *p++ = cpu_to_be32(1);
1855 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1856
1857 /* authsys_parms rfc1831 */
1858 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1859 p = xdr_encode_opaque(p, machine_name, len);
1860 *p++ = cpu_to_be32(0); /* UID */
1861 *p++ = cpu_to_be32(0); /* GID */
1862 *p = cpu_to_be32(0); /* No more gids */
1863 }
1864
1865 static void encode_destroy_session(struct xdr_stream *xdr,
1866 struct nfs4_session *session,
1867 struct compound_hdr *hdr)
1868 {
1869 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1870 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1871 }
1872
1873 static void encode_destroy_clientid(struct xdr_stream *xdr,
1874 uint64_t clientid,
1875 struct compound_hdr *hdr)
1876 {
1877 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1878 encode_uint64(xdr, clientid);
1879 }
1880
1881 static void encode_reclaim_complete(struct xdr_stream *xdr,
1882 struct nfs41_reclaim_complete_args *args,
1883 struct compound_hdr *hdr)
1884 {
1885 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1886 encode_uint32(xdr, args->one_fs);
1887 }
1888 #endif /* CONFIG_NFS_V4_1 */
1889
1890 static void encode_sequence(struct xdr_stream *xdr,
1891 const struct nfs4_sequence_args *args,
1892 struct compound_hdr *hdr)
1893 {
1894 #if defined(CONFIG_NFS_V4_1)
1895 struct nfs4_session *session;
1896 struct nfs4_slot_table *tp;
1897 struct nfs4_slot *slot = args->sa_slot;
1898 __be32 *p;
1899
1900 tp = slot->table;
1901 session = tp->session;
1902 if (!session)
1903 return;
1904
1905 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1906
1907 /*
1908 * Sessionid + seqid + slotid + max slotid + cache_this
1909 */
1910 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1911 "max_slotid=%d cache_this=%d\n",
1912 __func__,
1913 ((u32 *)session->sess_id.data)[0],
1914 ((u32 *)session->sess_id.data)[1],
1915 ((u32 *)session->sess_id.data)[2],
1916 ((u32 *)session->sess_id.data)[3],
1917 slot->seq_nr, slot->slot_nr,
1918 tp->highest_used_slotid, args->sa_cache_this);
1919 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1920 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1921 *p++ = cpu_to_be32(slot->seq_nr);
1922 *p++ = cpu_to_be32(slot->slot_nr);
1923 *p++ = cpu_to_be32(tp->highest_used_slotid);
1924 *p = cpu_to_be32(args->sa_cache_this);
1925 #endif /* CONFIG_NFS_V4_1 */
1926 }
1927
1928 #ifdef CONFIG_NFS_V4_1
1929 static void
1930 encode_getdevicelist(struct xdr_stream *xdr,
1931 const struct nfs4_getdevicelist_args *args,
1932 struct compound_hdr *hdr)
1933 {
1934 __be32 *p;
1935 nfs4_verifier dummy = {
1936 .data = "dummmmmy",
1937 };
1938
1939 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1940 p = reserve_space(xdr, 16);
1941 *p++ = cpu_to_be32(args->layoutclass);
1942 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1943 xdr_encode_hyper(p, 0ULL); /* cookie */
1944 encode_nfs4_verifier(xdr, &dummy);
1945 }
1946
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949 const struct nfs4_getdeviceinfo_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1956 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957 NFS4_DEVICEID4_SIZE);
1958 *p++ = cpu_to_be32(args->pdev->layout_type);
1959 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1960 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1961 }
1962
1963 static void
1964 encode_layoutget(struct xdr_stream *xdr,
1965 const struct nfs4_layoutget_args *args,
1966 struct compound_hdr *hdr)
1967 {
1968 __be32 *p;
1969
1970 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1971 p = reserve_space(xdr, 36);
1972 *p++ = cpu_to_be32(0); /* Signal layout available */
1973 *p++ = cpu_to_be32(args->type);
1974 *p++ = cpu_to_be32(args->range.iomode);
1975 p = xdr_encode_hyper(p, args->range.offset);
1976 p = xdr_encode_hyper(p, args->range.length);
1977 p = xdr_encode_hyper(p, args->minlength);
1978 encode_nfs4_stateid(xdr, &args->stateid);
1979 encode_uint32(xdr, args->maxcount);
1980
1981 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1982 __func__,
1983 args->type,
1984 args->range.iomode,
1985 (unsigned long)args->range.offset,
1986 (unsigned long)args->range.length,
1987 args->maxcount);
1988 }
1989
1990 static int
1991 encode_layoutcommit(struct xdr_stream *xdr,
1992 struct inode *inode,
1993 const struct nfs4_layoutcommit_args *args,
1994 struct compound_hdr *hdr)
1995 {
1996 __be32 *p;
1997
1998 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1999 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2000
2001 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2002 p = reserve_space(xdr, 20);
2003 /* Only whole file layouts */
2004 p = xdr_encode_hyper(p, 0); /* offset */
2005 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2006 *p = cpu_to_be32(0); /* reclaim */
2007 encode_nfs4_stateid(xdr, &args->stateid);
2008 p = reserve_space(xdr, 20);
2009 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010 p = xdr_encode_hyper(p, args->lastbytewritten);
2011 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2012 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2013
2014 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2015 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2016 NFS_I(inode)->layout, xdr, args);
2017 else
2018 encode_uint32(xdr, 0); /* no layout-type payload */
2019
2020 return 0;
2021 }
2022
2023 static void
2024 encode_layoutreturn(struct xdr_stream *xdr,
2025 const struct nfs4_layoutreturn_args *args,
2026 struct compound_hdr *hdr)
2027 {
2028 __be32 *p;
2029
2030 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2031 p = reserve_space(xdr, 16);
2032 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2033 *p++ = cpu_to_be32(args->layout_type);
2034 *p++ = cpu_to_be32(IOMODE_ANY);
2035 *p = cpu_to_be32(RETURN_FILE);
2036 p = reserve_space(xdr, 16);
2037 p = xdr_encode_hyper(p, 0);
2038 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2039 spin_lock(&args->inode->i_lock);
2040 encode_nfs4_stateid(xdr, &args->stateid);
2041 spin_unlock(&args->inode->i_lock);
2042 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2043 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2044 NFS_I(args->inode)->layout, xdr, args);
2045 } else
2046 encode_uint32(xdr, 0);
2047 }
2048
2049 static int
2050 encode_secinfo_no_name(struct xdr_stream *xdr,
2051 const struct nfs41_secinfo_no_name_args *args,
2052 struct compound_hdr *hdr)
2053 {
2054 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2055 encode_uint32(xdr, args->style);
2056 return 0;
2057 }
2058
2059 static void encode_test_stateid(struct xdr_stream *xdr,
2060 struct nfs41_test_stateid_args *args,
2061 struct compound_hdr *hdr)
2062 {
2063 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2064 encode_uint32(xdr, 1);
2065 encode_nfs4_stateid(xdr, args->stateid);
2066 }
2067
2068 static void encode_free_stateid(struct xdr_stream *xdr,
2069 struct nfs41_free_stateid_args *args,
2070 struct compound_hdr *hdr)
2071 {
2072 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2073 encode_nfs4_stateid(xdr, &args->stateid);
2074 }
2075 #endif /* CONFIG_NFS_V4_1 */
2076
2077 /*
2078 * END OF "GENERIC" ENCODE ROUTINES.
2079 */
2080
2081 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2082 {
2083 #if defined(CONFIG_NFS_V4_1)
2084 struct nfs4_session *session = args->sa_slot->table->session;
2085 if (session)
2086 return session->clp->cl_mvops->minor_version;
2087 #endif /* CONFIG_NFS_V4_1 */
2088 return 0;
2089 }
2090
2091 /*
2092 * Encode an ACCESS request
2093 */
2094 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2095 const struct nfs4_accessargs *args)
2096 {
2097 struct compound_hdr hdr = {
2098 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099 };
2100
2101 encode_compound_hdr(xdr, req, &hdr);
2102 encode_sequence(xdr, &args->seq_args, &hdr);
2103 encode_putfh(xdr, args->fh, &hdr);
2104 encode_access(xdr, args->access, &hdr);
2105 encode_getfattr(xdr, args->bitmask, &hdr);
2106 encode_nops(&hdr);
2107 }
2108
2109 /*
2110 * Encode LOOKUP request
2111 */
2112 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 const struct nfs4_lookup_arg *args)
2114 {
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 encode_compound_hdr(xdr, req, &hdr);
2120 encode_sequence(xdr, &args->seq_args, &hdr);
2121 encode_putfh(xdr, args->dir_fh, &hdr);
2122 encode_lookup(xdr, args->name, &hdr);
2123 encode_getfh(xdr, &hdr);
2124 encode_getfattr(xdr, args->bitmask, &hdr);
2125 encode_nops(&hdr);
2126 }
2127
2128 /*
2129 * Encode LOOKUP_ROOT request
2130 */
2131 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2132 struct xdr_stream *xdr,
2133 const struct nfs4_lookup_root_arg *args)
2134 {
2135 struct compound_hdr hdr = {
2136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137 };
2138
2139 encode_compound_hdr(xdr, req, &hdr);
2140 encode_sequence(xdr, &args->seq_args, &hdr);
2141 encode_putrootfh(xdr, &hdr);
2142 encode_getfh(xdr, &hdr);
2143 encode_getfattr(xdr, args->bitmask, &hdr);
2144 encode_nops(&hdr);
2145 }
2146
2147 /*
2148 * Encode REMOVE request
2149 */
2150 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2151 const struct nfs_removeargs *args)
2152 {
2153 struct compound_hdr hdr = {
2154 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155 };
2156
2157 encode_compound_hdr(xdr, req, &hdr);
2158 encode_sequence(xdr, &args->seq_args, &hdr);
2159 encode_putfh(xdr, args->fh, &hdr);
2160 encode_remove(xdr, &args->name, &hdr);
2161 encode_nops(&hdr);
2162 }
2163
2164 /*
2165 * Encode RENAME request
2166 */
2167 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2168 const struct nfs_renameargs *args)
2169 {
2170 struct compound_hdr hdr = {
2171 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172 };
2173
2174 encode_compound_hdr(xdr, req, &hdr);
2175 encode_sequence(xdr, &args->seq_args, &hdr);
2176 encode_putfh(xdr, args->old_dir, &hdr);
2177 encode_savefh(xdr, &hdr);
2178 encode_putfh(xdr, args->new_dir, &hdr);
2179 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2180 encode_nops(&hdr);
2181 }
2182
2183 /*
2184 * Encode LINK request
2185 */
2186 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2187 const struct nfs4_link_arg *args)
2188 {
2189 struct compound_hdr hdr = {
2190 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2191 };
2192
2193 encode_compound_hdr(xdr, req, &hdr);
2194 encode_sequence(xdr, &args->seq_args, &hdr);
2195 encode_putfh(xdr, args->fh, &hdr);
2196 encode_savefh(xdr, &hdr);
2197 encode_putfh(xdr, args->dir_fh, &hdr);
2198 encode_link(xdr, args->name, &hdr);
2199 encode_restorefh(xdr, &hdr);
2200 encode_getfattr(xdr, args->bitmask, &hdr);
2201 encode_nops(&hdr);
2202 }
2203
2204 /*
2205 * Encode CREATE request
2206 */
2207 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2208 const struct nfs4_create_arg *args)
2209 {
2210 struct compound_hdr hdr = {
2211 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212 };
2213
2214 encode_compound_hdr(xdr, req, &hdr);
2215 encode_sequence(xdr, &args->seq_args, &hdr);
2216 encode_putfh(xdr, args->dir_fh, &hdr);
2217 encode_create(xdr, args, &hdr);
2218 encode_getfh(xdr, &hdr);
2219 encode_getfattr(xdr, args->bitmask, &hdr);
2220 encode_nops(&hdr);
2221 }
2222
2223 /*
2224 * Encode SYMLINK request
2225 */
2226 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2227 const struct nfs4_create_arg *args)
2228 {
2229 nfs4_xdr_enc_create(req, xdr, args);
2230 }
2231
2232 /*
2233 * Encode GETATTR request
2234 */
2235 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2236 const struct nfs4_getattr_arg *args)
2237 {
2238 struct compound_hdr hdr = {
2239 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240 };
2241
2242 encode_compound_hdr(xdr, req, &hdr);
2243 encode_sequence(xdr, &args->seq_args, &hdr);
2244 encode_putfh(xdr, args->fh, &hdr);
2245 encode_getfattr(xdr, args->bitmask, &hdr);
2246 encode_nops(&hdr);
2247 }
2248
2249 /*
2250 * Encode a CLOSE request
2251 */
2252 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2253 struct nfs_closeargs *args)
2254 {
2255 struct compound_hdr hdr = {
2256 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2257 };
2258
2259 encode_compound_hdr(xdr, req, &hdr);
2260 encode_sequence(xdr, &args->seq_args, &hdr);
2261 encode_putfh(xdr, args->fh, &hdr);
2262 encode_close(xdr, args, &hdr);
2263 encode_getfattr(xdr, args->bitmask, &hdr);
2264 encode_nops(&hdr);
2265 }
2266
2267 /*
2268 * Encode an OPEN request
2269 */
2270 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2271 struct nfs_openargs *args)
2272 {
2273 struct compound_hdr hdr = {
2274 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275 };
2276
2277 encode_compound_hdr(xdr, req, &hdr);
2278 encode_sequence(xdr, &args->seq_args, &hdr);
2279 encode_putfh(xdr, args->fh, &hdr);
2280 encode_open(xdr, args, &hdr);
2281 encode_getfh(xdr, &hdr);
2282 if (args->access)
2283 encode_access(xdr, args->access, &hdr);
2284 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2285 encode_nops(&hdr);
2286 }
2287
2288 /*
2289 * Encode an OPEN_CONFIRM request
2290 */
2291 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2292 struct xdr_stream *xdr,
2293 struct nfs_open_confirmargs *args)
2294 {
2295 struct compound_hdr hdr = {
2296 .nops = 0,
2297 };
2298
2299 encode_compound_hdr(xdr, req, &hdr);
2300 encode_putfh(xdr, args->fh, &hdr);
2301 encode_open_confirm(xdr, args, &hdr);
2302 encode_nops(&hdr);
2303 }
2304
2305 /*
2306 * Encode an OPEN request with no attributes.
2307 */
2308 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2309 struct xdr_stream *xdr,
2310 struct nfs_openargs *args)
2311 {
2312 struct compound_hdr hdr = {
2313 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314 };
2315
2316 encode_compound_hdr(xdr, req, &hdr);
2317 encode_sequence(xdr, &args->seq_args, &hdr);
2318 encode_putfh(xdr, args->fh, &hdr);
2319 encode_open(xdr, args, &hdr);
2320 if (args->access)
2321 encode_access(xdr, args->access, &hdr);
2322 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2323 encode_nops(&hdr);
2324 }
2325
2326 /*
2327 * Encode an OPEN_DOWNGRADE request
2328 */
2329 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2330 struct xdr_stream *xdr,
2331 struct nfs_closeargs *args)
2332 {
2333 struct compound_hdr hdr = {
2334 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335 };
2336
2337 encode_compound_hdr(xdr, req, &hdr);
2338 encode_sequence(xdr, &args->seq_args, &hdr);
2339 encode_putfh(xdr, args->fh, &hdr);
2340 encode_open_downgrade(xdr, args, &hdr);
2341 encode_getfattr(xdr, args->bitmask, &hdr);
2342 encode_nops(&hdr);
2343 }
2344
2345 /*
2346 * Encode a LOCK request
2347 */
2348 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2349 struct nfs_lock_args *args)
2350 {
2351 struct compound_hdr hdr = {
2352 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2353 };
2354
2355 encode_compound_hdr(xdr, req, &hdr);
2356 encode_sequence(xdr, &args->seq_args, &hdr);
2357 encode_putfh(xdr, args->fh, &hdr);
2358 encode_lock(xdr, args, &hdr);
2359 encode_nops(&hdr);
2360 }
2361
2362 /*
2363 * Encode a LOCKT request
2364 */
2365 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2366 struct nfs_lockt_args *args)
2367 {
2368 struct compound_hdr hdr = {
2369 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370 };
2371
2372 encode_compound_hdr(xdr, req, &hdr);
2373 encode_sequence(xdr, &args->seq_args, &hdr);
2374 encode_putfh(xdr, args->fh, &hdr);
2375 encode_lockt(xdr, args, &hdr);
2376 encode_nops(&hdr);
2377 }
2378
2379 /*
2380 * Encode a LOCKU request
2381 */
2382 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2383 struct nfs_locku_args *args)
2384 {
2385 struct compound_hdr hdr = {
2386 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387 };
2388
2389 encode_compound_hdr(xdr, req, &hdr);
2390 encode_sequence(xdr, &args->seq_args, &hdr);
2391 encode_putfh(xdr, args->fh, &hdr);
2392 encode_locku(xdr, args, &hdr);
2393 encode_nops(&hdr);
2394 }
2395
2396 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2397 struct xdr_stream *xdr,
2398 struct nfs_release_lockowner_args *args)
2399 {
2400 struct compound_hdr hdr = {
2401 .minorversion = 0,
2402 };
2403
2404 encode_compound_hdr(xdr, req, &hdr);
2405 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2406 encode_nops(&hdr);
2407 }
2408
2409 /*
2410 * Encode a READLINK request
2411 */
2412 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2413 const struct nfs4_readlink *args)
2414 {
2415 struct compound_hdr hdr = {
2416 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2417 };
2418
2419 encode_compound_hdr(xdr, req, &hdr);
2420 encode_sequence(xdr, &args->seq_args, &hdr);
2421 encode_putfh(xdr, args->fh, &hdr);
2422 encode_readlink(xdr, args, req, &hdr);
2423
2424 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2425 args->pgbase, args->pglen);
2426 encode_nops(&hdr);
2427 }
2428
2429 /*
2430 * Encode a READDIR request
2431 */
2432 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2433 const struct nfs4_readdir_arg *args)
2434 {
2435 struct compound_hdr hdr = {
2436 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2437 };
2438
2439 encode_compound_hdr(xdr, req, &hdr);
2440 encode_sequence(xdr, &args->seq_args, &hdr);
2441 encode_putfh(xdr, args->fh, &hdr);
2442 encode_readdir(xdr, args, req, &hdr);
2443
2444 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2445 args->pgbase, args->count);
2446 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2447 __func__, hdr.replen << 2, args->pages,
2448 args->pgbase, args->count);
2449 encode_nops(&hdr);
2450 }
2451
2452 /*
2453 * Encode a READ request
2454 */
2455 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2456 struct nfs_pgio_args *args)
2457 {
2458 struct compound_hdr hdr = {
2459 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460 };
2461
2462 encode_compound_hdr(xdr, req, &hdr);
2463 encode_sequence(xdr, &args->seq_args, &hdr);
2464 encode_putfh(xdr, args->fh, &hdr);
2465 encode_read(xdr, args, &hdr);
2466
2467 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2468 args->pages, args->pgbase, args->count);
2469 req->rq_rcv_buf.flags |= XDRBUF_READ;
2470 encode_nops(&hdr);
2471 }
2472
2473 /*
2474 * Encode an SETATTR request
2475 */
2476 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2477 struct nfs_setattrargs *args)
2478 {
2479 struct compound_hdr hdr = {
2480 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481 };
2482
2483 encode_compound_hdr(xdr, req, &hdr);
2484 encode_sequence(xdr, &args->seq_args, &hdr);
2485 encode_putfh(xdr, args->fh, &hdr);
2486 encode_setattr(xdr, args, args->server, &hdr);
2487 encode_getfattr(xdr, args->bitmask, &hdr);
2488 encode_nops(&hdr);
2489 }
2490
2491 /*
2492 * Encode a GETACL request
2493 */
2494 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2495 struct nfs_getaclargs *args)
2496 {
2497 struct compound_hdr hdr = {
2498 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499 };
2500 uint32_t replen;
2501
2502 encode_compound_hdr(xdr, req, &hdr);
2503 encode_sequence(xdr, &args->seq_args, &hdr);
2504 encode_putfh(xdr, args->fh, &hdr);
2505 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2506 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2507
2508 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2509 args->acl_pages, args->acl_pgbase, args->acl_len);
2510
2511 encode_nops(&hdr);
2512 }
2513
2514 /*
2515 * Encode a WRITE request
2516 */
2517 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2518 struct nfs_pgio_args *args)
2519 {
2520 struct compound_hdr hdr = {
2521 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2522 };
2523
2524 encode_compound_hdr(xdr, req, &hdr);
2525 encode_sequence(xdr, &args->seq_args, &hdr);
2526 encode_putfh(xdr, args->fh, &hdr);
2527 encode_write(xdr, args, &hdr);
2528 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2529 if (args->bitmask)
2530 encode_getfattr(xdr, args->bitmask, &hdr);
2531 encode_nops(&hdr);
2532 }
2533
2534 /*
2535 * a COMMIT request
2536 */
2537 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2538 struct nfs_commitargs *args)
2539 {
2540 struct compound_hdr hdr = {
2541 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542 };
2543
2544 encode_compound_hdr(xdr, req, &hdr);
2545 encode_sequence(xdr, &args->seq_args, &hdr);
2546 encode_putfh(xdr, args->fh, &hdr);
2547 encode_commit(xdr, args, &hdr);
2548 encode_nops(&hdr);
2549 }
2550
2551 /*
2552 * FSINFO request
2553 */
2554 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2555 struct nfs4_fsinfo_arg *args)
2556 {
2557 struct compound_hdr hdr = {
2558 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2559 };
2560
2561 encode_compound_hdr(xdr, req, &hdr);
2562 encode_sequence(xdr, &args->seq_args, &hdr);
2563 encode_putfh(xdr, args->fh, &hdr);
2564 encode_fsinfo(xdr, args->bitmask, &hdr);
2565 encode_nops(&hdr);
2566 }
2567
2568 /*
2569 * a PATHCONF request
2570 */
2571 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2572 const struct nfs4_pathconf_arg *args)
2573 {
2574 struct compound_hdr hdr = {
2575 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2576 };
2577
2578 encode_compound_hdr(xdr, req, &hdr);
2579 encode_sequence(xdr, &args->seq_args, &hdr);
2580 encode_putfh(xdr, args->fh, &hdr);
2581 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2582 &hdr);
2583 encode_nops(&hdr);
2584 }
2585
2586 /*
2587 * a STATFS request
2588 */
2589 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2590 const struct nfs4_statfs_arg *args)
2591 {
2592 struct compound_hdr hdr = {
2593 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594 };
2595
2596 encode_compound_hdr(xdr, req, &hdr);
2597 encode_sequence(xdr, &args->seq_args, &hdr);
2598 encode_putfh(xdr, args->fh, &hdr);
2599 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2600 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2601 encode_nops(&hdr);
2602 }
2603
2604 /*
2605 * GETATTR_BITMAP request
2606 */
2607 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2608 struct xdr_stream *xdr,
2609 struct nfs4_server_caps_arg *args)
2610 {
2611 struct compound_hdr hdr = {
2612 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613 };
2614
2615 encode_compound_hdr(xdr, req, &hdr);
2616 encode_sequence(xdr, &args->seq_args, &hdr);
2617 encode_putfh(xdr, args->fhandle, &hdr);
2618 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2619 FATTR4_WORD0_FH_EXPIRE_TYPE|
2620 FATTR4_WORD0_LINK_SUPPORT|
2621 FATTR4_WORD0_SYMLINK_SUPPORT|
2622 FATTR4_WORD0_ACLSUPPORT, &hdr);
2623 encode_nops(&hdr);
2624 }
2625
2626 /*
2627 * a RENEW request
2628 */
2629 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2630 struct nfs_client *clp)
2631 {
2632 struct compound_hdr hdr = {
2633 .nops = 0,
2634 };
2635
2636 encode_compound_hdr(xdr, req, &hdr);
2637 encode_renew(xdr, clp->cl_clientid, &hdr);
2638 encode_nops(&hdr);
2639 }
2640
2641 /*
2642 * a SETCLIENTID request
2643 */
2644 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2645 struct xdr_stream *xdr,
2646 struct nfs4_setclientid *sc)
2647 {
2648 struct compound_hdr hdr = {
2649 .nops = 0,
2650 };
2651
2652 encode_compound_hdr(xdr, req, &hdr);
2653 encode_setclientid(xdr, sc, &hdr);
2654 encode_nops(&hdr);
2655 }
2656
2657 /*
2658 * a SETCLIENTID_CONFIRM request
2659 */
2660 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2661 struct xdr_stream *xdr,
2662 struct nfs4_setclientid_res *arg)
2663 {
2664 struct compound_hdr hdr = {
2665 .nops = 0,
2666 };
2667
2668 encode_compound_hdr(xdr, req, &hdr);
2669 encode_setclientid_confirm(xdr, arg, &hdr);
2670 encode_nops(&hdr);
2671 }
2672
2673 /*
2674 * DELEGRETURN request
2675 */
2676 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2677 struct xdr_stream *xdr,
2678 const struct nfs4_delegreturnargs *args)
2679 {
2680 struct compound_hdr hdr = {
2681 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682 };
2683
2684 encode_compound_hdr(xdr, req, &hdr);
2685 encode_sequence(xdr, &args->seq_args, &hdr);
2686 encode_putfh(xdr, args->fhandle, &hdr);
2687 encode_getfattr(xdr, args->bitmask, &hdr);
2688 encode_delegreturn(xdr, args->stateid, &hdr);
2689 encode_nops(&hdr);
2690 }
2691
2692 /*
2693 * Encode FS_LOCATIONS request
2694 */
2695 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2696 struct xdr_stream *xdr,
2697 struct nfs4_fs_locations_arg *args)
2698 {
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702 uint32_t replen;
2703
2704 encode_compound_hdr(xdr, req, &hdr);
2705 encode_sequence(xdr, &args->seq_args, &hdr);
2706 if (args->migration) {
2707 encode_putfh(xdr, args->fh, &hdr);
2708 replen = hdr.replen;
2709 encode_fs_locations(xdr, args->bitmask, &hdr);
2710 if (args->renew)
2711 encode_renew(xdr, args->clientid, &hdr);
2712 } else {
2713 encode_putfh(xdr, args->dir_fh, &hdr);
2714 encode_lookup(xdr, args->name, &hdr);
2715 replen = hdr.replen;
2716 encode_fs_locations(xdr, args->bitmask, &hdr);
2717 }
2718
2719 /* Set up reply kvec to capture returned fs_locations array. */
2720 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2721 0, PAGE_SIZE);
2722 encode_nops(&hdr);
2723 }
2724
2725 /*
2726 * Encode SECINFO request
2727 */
2728 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 struct nfs4_secinfo_arg *args)
2731 {
2732 struct compound_hdr hdr = {
2733 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734 };
2735
2736 encode_compound_hdr(xdr, req, &hdr);
2737 encode_sequence(xdr, &args->seq_args, &hdr);
2738 encode_putfh(xdr, args->dir_fh, &hdr);
2739 encode_secinfo(xdr, args->name, &hdr);
2740 encode_nops(&hdr);
2741 }
2742
2743 /*
2744 * Encode FSID_PRESENT request
2745 */
2746 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2747 struct xdr_stream *xdr,
2748 struct nfs4_fsid_present_arg *args)
2749 {
2750 struct compound_hdr hdr = {
2751 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752 };
2753
2754 encode_compound_hdr(xdr, req, &hdr);
2755 encode_sequence(xdr, &args->seq_args, &hdr);
2756 encode_putfh(xdr, args->fh, &hdr);
2757 encode_getfh(xdr, &hdr);
2758 if (args->renew)
2759 encode_renew(xdr, args->clientid, &hdr);
2760 encode_nops(&hdr);
2761 }
2762
2763 #if defined(CONFIG_NFS_V4_1)
2764 /*
2765 * BIND_CONN_TO_SESSION request
2766 */
2767 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 struct nfs_client *clp)
2770 {
2771 struct compound_hdr hdr = {
2772 .minorversion = clp->cl_mvops->minor_version,
2773 };
2774
2775 encode_compound_hdr(xdr, req, &hdr);
2776 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2777 encode_nops(&hdr);
2778 }
2779
2780 /*
2781 * EXCHANGE_ID request
2782 */
2783 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2784 struct xdr_stream *xdr,
2785 struct nfs41_exchange_id_args *args)
2786 {
2787 struct compound_hdr hdr = {
2788 .minorversion = args->client->cl_mvops->minor_version,
2789 };
2790
2791 encode_compound_hdr(xdr, req, &hdr);
2792 encode_exchange_id(xdr, args, &hdr);
2793 encode_nops(&hdr);
2794 }
2795
2796 /*
2797 * a CREATE_SESSION request
2798 */
2799 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2800 struct xdr_stream *xdr,
2801 struct nfs41_create_session_args *args)
2802 {
2803 struct compound_hdr hdr = {
2804 .minorversion = args->client->cl_mvops->minor_version,
2805 };
2806
2807 encode_compound_hdr(xdr, req, &hdr);
2808 encode_create_session(xdr, args, &hdr);
2809 encode_nops(&hdr);
2810 }
2811
2812 /*
2813 * a DESTROY_SESSION request
2814 */
2815 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2816 struct xdr_stream *xdr,
2817 struct nfs4_session *session)
2818 {
2819 struct compound_hdr hdr = {
2820 .minorversion = session->clp->cl_mvops->minor_version,
2821 };
2822
2823 encode_compound_hdr(xdr, req, &hdr);
2824 encode_destroy_session(xdr, session, &hdr);
2825 encode_nops(&hdr);
2826 }
2827
2828 /*
2829 * a DESTROY_CLIENTID request
2830 */
2831 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2832 struct xdr_stream *xdr,
2833 struct nfs_client *clp)
2834 {
2835 struct compound_hdr hdr = {
2836 .minorversion = clp->cl_mvops->minor_version,
2837 };
2838
2839 encode_compound_hdr(xdr, req, &hdr);
2840 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2841 encode_nops(&hdr);
2842 }
2843
2844 /*
2845 * a SEQUENCE request
2846 */
2847 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2848 struct nfs4_sequence_args *args)
2849 {
2850 struct compound_hdr hdr = {
2851 .minorversion = nfs4_xdr_minorversion(args),
2852 };
2853
2854 encode_compound_hdr(xdr, req, &hdr);
2855 encode_sequence(xdr, args, &hdr);
2856 encode_nops(&hdr);
2857 }
2858
2859 /*
2860 * a GET_LEASE_TIME request
2861 */
2862 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2863 struct xdr_stream *xdr,
2864 struct nfs4_get_lease_time_args *args)
2865 {
2866 struct compound_hdr hdr = {
2867 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2868 };
2869 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2870
2871 encode_compound_hdr(xdr, req, &hdr);
2872 encode_sequence(xdr, &args->la_seq_args, &hdr);
2873 encode_putrootfh(xdr, &hdr);
2874 encode_fsinfo(xdr, lease_bitmap, &hdr);
2875 encode_nops(&hdr);
2876 }
2877
2878 /*
2879 * a RECLAIM_COMPLETE request
2880 */
2881 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2882 struct xdr_stream *xdr,
2883 struct nfs41_reclaim_complete_args *args)
2884 {
2885 struct compound_hdr hdr = {
2886 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2887 };
2888
2889 encode_compound_hdr(xdr, req, &hdr);
2890 encode_sequence(xdr, &args->seq_args, &hdr);
2891 encode_reclaim_complete(xdr, args, &hdr);
2892 encode_nops(&hdr);
2893 }
2894
2895 /*
2896 * Encode GETDEVICELIST request
2897 */
2898 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2899 struct xdr_stream *xdr,
2900 struct nfs4_getdevicelist_args *args)
2901 {
2902 struct compound_hdr hdr = {
2903 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2904 };
2905
2906 encode_compound_hdr(xdr, req, &hdr);
2907 encode_sequence(xdr, &args->seq_args, &hdr);
2908 encode_putfh(xdr, args->fh, &hdr);
2909 encode_getdevicelist(xdr, args, &hdr);
2910 encode_nops(&hdr);
2911 }
2912
2913 /*
2914 * Encode GETDEVICEINFO request
2915 */
2916 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2917 struct xdr_stream *xdr,
2918 struct nfs4_getdeviceinfo_args *args)
2919 {
2920 struct compound_hdr hdr = {
2921 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2922 };
2923
2924 encode_compound_hdr(xdr, req, &hdr);
2925 encode_sequence(xdr, &args->seq_args, &hdr);
2926 encode_getdeviceinfo(xdr, args, &hdr);
2927
2928 /* set up reply kvec. Subtract notification bitmap max size (2)
2929 * so that notification bitmap is put in xdr_buf tail */
2930 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2931 args->pdev->pages, args->pdev->pgbase,
2932 args->pdev->pglen);
2933
2934 encode_nops(&hdr);
2935 }
2936
2937 /*
2938 * Encode LAYOUTGET request
2939 */
2940 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2941 struct xdr_stream *xdr,
2942 struct nfs4_layoutget_args *args)
2943 {
2944 struct compound_hdr hdr = {
2945 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2946 };
2947
2948 encode_compound_hdr(xdr, req, &hdr);
2949 encode_sequence(xdr, &args->seq_args, &hdr);
2950 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2951 encode_layoutget(xdr, args, &hdr);
2952
2953 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2954 args->layout.pages, 0, args->layout.pglen);
2955
2956 encode_nops(&hdr);
2957 }
2958
2959 /*
2960 * Encode LAYOUTCOMMIT request
2961 */
2962 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2963 struct xdr_stream *xdr,
2964 struct nfs4_layoutcommit_args *args)
2965 {
2966 struct nfs4_layoutcommit_data *data =
2967 container_of(args, struct nfs4_layoutcommit_data, args);
2968 struct compound_hdr hdr = {
2969 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2970 };
2971
2972 encode_compound_hdr(xdr, req, &hdr);
2973 encode_sequence(xdr, &args->seq_args, &hdr);
2974 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2975 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2976 encode_getfattr(xdr, args->bitmask, &hdr);
2977 encode_nops(&hdr);
2978 }
2979
2980 /*
2981 * Encode LAYOUTRETURN request
2982 */
2983 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2984 struct xdr_stream *xdr,
2985 struct nfs4_layoutreturn_args *args)
2986 {
2987 struct compound_hdr hdr = {
2988 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989 };
2990
2991 encode_compound_hdr(xdr, req, &hdr);
2992 encode_sequence(xdr, &args->seq_args, &hdr);
2993 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2994 encode_layoutreturn(xdr, args, &hdr);
2995 encode_nops(&hdr);
2996 }
2997
2998 /*
2999 * Encode SECINFO_NO_NAME request
3000 */
3001 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3002 struct xdr_stream *xdr,
3003 struct nfs41_secinfo_no_name_args *args)
3004 {
3005 struct compound_hdr hdr = {
3006 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007 };
3008
3009 encode_compound_hdr(xdr, req, &hdr);
3010 encode_sequence(xdr, &args->seq_args, &hdr);
3011 encode_putrootfh(xdr, &hdr);
3012 encode_secinfo_no_name(xdr, args, &hdr);
3013 encode_nops(&hdr);
3014 return 0;
3015 }
3016
3017 /*
3018 * Encode TEST_STATEID request
3019 */
3020 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3021 struct xdr_stream *xdr,
3022 struct nfs41_test_stateid_args *args)
3023 {
3024 struct compound_hdr hdr = {
3025 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3026 };
3027
3028 encode_compound_hdr(xdr, req, &hdr);
3029 encode_sequence(xdr, &args->seq_args, &hdr);
3030 encode_test_stateid(xdr, args, &hdr);
3031 encode_nops(&hdr);
3032 }
3033
3034 /*
3035 * Encode FREE_STATEID request
3036 */
3037 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3038 struct xdr_stream *xdr,
3039 struct nfs41_free_stateid_args *args)
3040 {
3041 struct compound_hdr hdr = {
3042 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3043 };
3044
3045 encode_compound_hdr(xdr, req, &hdr);
3046 encode_sequence(xdr, &args->seq_args, &hdr);
3047 encode_free_stateid(xdr, args, &hdr);
3048 encode_nops(&hdr);
3049 }
3050 #endif /* CONFIG_NFS_V4_1 */
3051
3052 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3053 {
3054 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3055 "Remaining buffer length is %tu words.\n",
3056 func, xdr->end - xdr->p);
3057 }
3058
3059 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3060 {
3061 __be32 *p;
3062
3063 p = xdr_inline_decode(xdr, 4);
3064 if (unlikely(!p))
3065 goto out_overflow;
3066 *len = be32_to_cpup(p);
3067 p = xdr_inline_decode(xdr, *len);
3068 if (unlikely(!p))
3069 goto out_overflow;
3070 *string = (char *)p;
3071 return 0;
3072 out_overflow:
3073 print_overflow_msg(__func__, xdr);
3074 return -EIO;
3075 }
3076
3077 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3078 {
3079 __be32 *p;
3080
3081 p = xdr_inline_decode(xdr, 8);
3082 if (unlikely(!p))
3083 goto out_overflow;
3084 hdr->status = be32_to_cpup(p++);
3085 hdr->taglen = be32_to_cpup(p);
3086
3087 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3088 if (unlikely(!p))
3089 goto out_overflow;
3090 hdr->tag = (char *)p;
3091 p += XDR_QUADLEN(hdr->taglen);
3092 hdr->nops = be32_to_cpup(p);
3093 if (unlikely(hdr->nops < 1))
3094 return nfs4_stat_to_errno(hdr->status);
3095 return 0;
3096 out_overflow:
3097 print_overflow_msg(__func__, xdr);
3098 return -EIO;
3099 }
3100
3101 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3102 int *nfs_retval)
3103 {
3104 __be32 *p;
3105 uint32_t opnum;
3106 int32_t nfserr;
3107
3108 p = xdr_inline_decode(xdr, 8);
3109 if (unlikely(!p))
3110 goto out_overflow;
3111 opnum = be32_to_cpup(p++);
3112 if (unlikely(opnum != expected))
3113 goto out_bad_operation;
3114 nfserr = be32_to_cpup(p);
3115 if (nfserr == NFS_OK)
3116 *nfs_retval = 0;
3117 else
3118 *nfs_retval = nfs4_stat_to_errno(nfserr);
3119 return true;
3120 out_bad_operation:
3121 dprintk("nfs: Server returned operation"
3122 " %d but we issued a request for %d\n",
3123 opnum, expected);
3124 *nfs_retval = -EREMOTEIO;
3125 return false;
3126 out_overflow:
3127 print_overflow_msg(__func__, xdr);
3128 *nfs_retval = -EIO;
3129 return false;
3130 }
3131
3132 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3133 {
3134 int retval;
3135
3136 __decode_op_hdr(xdr, expected, &retval);
3137 return retval;
3138 }
3139
3140 /* Dummy routine */
3141 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3142 {
3143 __be32 *p;
3144 unsigned int strlen;
3145 char *str;
3146
3147 p = xdr_inline_decode(xdr, 12);
3148 if (likely(p))
3149 return decode_opaque_inline(xdr, &strlen, &str);
3150 print_overflow_msg(__func__, xdr);
3151 return -EIO;
3152 }
3153
3154 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3155 {
3156 uint32_t bmlen;
3157 __be32 *p;
3158
3159 p = xdr_inline_decode(xdr, 4);
3160 if (unlikely(!p))
3161 goto out_overflow;
3162 bmlen = be32_to_cpup(p);
3163
3164 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3165 p = xdr_inline_decode(xdr, (bmlen << 2));
3166 if (unlikely(!p))
3167 goto out_overflow;
3168 if (bmlen > 0) {
3169 bitmap[0] = be32_to_cpup(p++);
3170 if (bmlen > 1) {
3171 bitmap[1] = be32_to_cpup(p++);
3172 if (bmlen > 2)
3173 bitmap[2] = be32_to_cpup(p);
3174 }
3175 }
3176 return 0;
3177 out_overflow:
3178 print_overflow_msg(__func__, xdr);
3179 return -EIO;
3180 }
3181
3182 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3183 {
3184 __be32 *p;
3185
3186 p = xdr_inline_decode(xdr, 4);
3187 if (unlikely(!p))
3188 goto out_overflow;
3189 *attrlen = be32_to_cpup(p);
3190 *savep = xdr_stream_pos(xdr);
3191 return 0;
3192 out_overflow:
3193 print_overflow_msg(__func__, xdr);
3194 return -EIO;
3195 }
3196
3197 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3198 {
3199 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3200 int ret;
3201 ret = decode_attr_bitmap(xdr, bitmask);
3202 if (unlikely(ret < 0))
3203 return ret;
3204 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3205 } else
3206 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3207 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3208 bitmask[0], bitmask[1], bitmask[2]);
3209 return 0;
3210 }
3211
3212 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3213 {
3214 __be32 *p;
3215 int ret = 0;
3216
3217 *type = 0;
3218 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3219 return -EIO;
3220 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3221 p = xdr_inline_decode(xdr, 4);
3222 if (unlikely(!p))
3223 goto out_overflow;
3224 *type = be32_to_cpup(p);
3225 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3226 dprintk("%s: bad type %d\n", __func__, *type);
3227 return -EIO;
3228 }
3229 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3230 ret = NFS_ATTR_FATTR_TYPE;
3231 }
3232 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3233 return ret;
3234 out_overflow:
3235 print_overflow_msg(__func__, xdr);
3236 return -EIO;
3237 }
3238
3239 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3240 uint32_t *bitmap, uint32_t *type)
3241 {
3242 __be32 *p;
3243
3244 *type = 0;
3245 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3246 return -EIO;
3247 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3248 p = xdr_inline_decode(xdr, 4);
3249 if (unlikely(!p))
3250 goto out_overflow;
3251 *type = be32_to_cpup(p);
3252 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3253 }
3254 dprintk("%s: expire type=0x%x\n", __func__, *type);
3255 return 0;
3256 out_overflow:
3257 print_overflow_msg(__func__, xdr);
3258 return -EIO;
3259 }
3260
3261 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3262 {
3263 __be32 *p;
3264 int ret = 0;
3265
3266 *change = 0;
3267 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3268 return -EIO;
3269 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3270 p = xdr_inline_decode(xdr, 8);
3271 if (unlikely(!p))
3272 goto out_overflow;
3273 xdr_decode_hyper(p, change);
3274 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3275 ret = NFS_ATTR_FATTR_CHANGE;
3276 }
3277 dprintk("%s: change attribute=%Lu\n", __func__,
3278 (unsigned long long)*change);
3279 return ret;
3280 out_overflow:
3281 print_overflow_msg(__func__, xdr);
3282 return -EIO;
3283 }
3284
3285 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3286 {
3287 __be32 *p;
3288 int ret = 0;
3289
3290 *size = 0;
3291 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3292 return -EIO;
3293 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3294 p = xdr_inline_decode(xdr, 8);
3295 if (unlikely(!p))
3296 goto out_overflow;
3297 xdr_decode_hyper(p, size);
3298 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3299 ret = NFS_ATTR_FATTR_SIZE;
3300 }
3301 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3302 return ret;
3303 out_overflow:
3304 print_overflow_msg(__func__, xdr);
3305 return -EIO;
3306 }
3307
3308 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3309 {
3310 __be32 *p;
3311
3312 *res = 0;
3313 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3314 return -EIO;
3315 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3316 p = xdr_inline_decode(xdr, 4);
3317 if (unlikely(!p))
3318 goto out_overflow;
3319 *res = be32_to_cpup(p);
3320 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3321 }
3322 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3323 return 0;
3324 out_overflow:
3325 print_overflow_msg(__func__, xdr);
3326 return -EIO;
3327 }
3328
3329 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3330 {
3331 __be32 *p;
3332
3333 *res = 0;
3334 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3335 return -EIO;
3336 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3337 p = xdr_inline_decode(xdr, 4);
3338 if (unlikely(!p))
3339 goto out_overflow;
3340 *res = be32_to_cpup(p);
3341 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3342 }
3343 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3344 return 0;
3345 out_overflow:
3346 print_overflow_msg(__func__, xdr);
3347 return -EIO;
3348 }
3349
3350 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3351 {
3352 __be32 *p;
3353 int ret = 0;
3354
3355 fsid->major = 0;
3356 fsid->minor = 0;
3357 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3358 return -EIO;
3359 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3360 p = xdr_inline_decode(xdr, 16);
3361 if (unlikely(!p))
3362 goto out_overflow;
3363 p = xdr_decode_hyper(p, &fsid->major);
3364 xdr_decode_hyper(p, &fsid->minor);
3365 bitmap[0] &= ~FATTR4_WORD0_FSID;
3366 ret = NFS_ATTR_FATTR_FSID;
3367 }
3368 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3369 (unsigned long long)fsid->major,
3370 (unsigned long long)fsid->minor);
3371 return ret;
3372 out_overflow:
3373 print_overflow_msg(__func__, xdr);
3374 return -EIO;
3375 }
3376
3377 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378 {
3379 __be32 *p;
3380
3381 *res = 60;
3382 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3383 return -EIO;
3384 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3385 p = xdr_inline_decode(xdr, 4);
3386 if (unlikely(!p))
3387 goto out_overflow;
3388 *res = be32_to_cpup(p);
3389 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3390 }
3391 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3392 return 0;
3393 out_overflow:
3394 print_overflow_msg(__func__, xdr);
3395 return -EIO;
3396 }
3397
3398 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3399 {
3400 __be32 *p;
3401
3402 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3403 return -EIO;
3404 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3405 p = xdr_inline_decode(xdr, 4);
3406 if (unlikely(!p))
3407 goto out_overflow;
3408 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3409 *res = -be32_to_cpup(p);
3410 }
3411 return 0;
3412 out_overflow:
3413 print_overflow_msg(__func__, xdr);
3414 return -EIO;
3415 }
3416
3417 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3418 {
3419 __be32 *p;
3420 int len;
3421
3422 if (fh != NULL)
3423 memset(fh, 0, sizeof(*fh));
3424
3425 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3426 return -EIO;
3427 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3428 p = xdr_inline_decode(xdr, 4);
3429 if (unlikely(!p))
3430 goto out_overflow;
3431 len = be32_to_cpup(p);
3432 if (len > NFS4_FHSIZE)
3433 return -EIO;
3434 p = xdr_inline_decode(xdr, len);
3435 if (unlikely(!p))
3436 goto out_overflow;
3437 if (fh != NULL) {
3438 memcpy(fh->data, p, len);
3439 fh->size = len;
3440 }
3441 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3442 }
3443 return 0;
3444 out_overflow:
3445 print_overflow_msg(__func__, xdr);
3446 return -EIO;
3447 }
3448
3449 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3450 {
3451 __be32 *p;
3452
3453 *res = 0;
3454 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3455 return -EIO;
3456 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3457 p = xdr_inline_decode(xdr, 4);
3458 if (unlikely(!p))
3459 goto out_overflow;
3460 *res = be32_to_cpup(p);
3461 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3462 }
3463 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3464 return 0;
3465 out_overflow:
3466 print_overflow_msg(__func__, xdr);
3467 return -EIO;
3468 }
3469
3470 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3471 {
3472 __be32 *p;
3473 int ret = 0;
3474
3475 *fileid = 0;
3476 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3477 return -EIO;
3478 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3479 p = xdr_inline_decode(xdr, 8);
3480 if (unlikely(!p))
3481 goto out_overflow;
3482 xdr_decode_hyper(p, fileid);
3483 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3484 ret = NFS_ATTR_FATTR_FILEID;
3485 }
3486 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3487 return ret;
3488 out_overflow:
3489 print_overflow_msg(__func__, xdr);
3490 return -EIO;
3491 }
3492
3493 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3494 {
3495 __be32 *p;
3496 int ret = 0;
3497
3498 *fileid = 0;
3499 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3500 return -EIO;
3501 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3502 p = xdr_inline_decode(xdr, 8);
3503 if (unlikely(!p))
3504 goto out_overflow;
3505 xdr_decode_hyper(p, fileid);
3506 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3507 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3508 }
3509 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3510 return ret;
3511 out_overflow:
3512 print_overflow_msg(__func__, xdr);
3513 return -EIO;
3514 }
3515
3516 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3517 {
3518 __be32 *p;
3519 int status = 0;
3520
3521 *res = 0;
3522 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3523 return -EIO;
3524 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3525 p = xdr_inline_decode(xdr, 8);
3526 if (unlikely(!p))
3527 goto out_overflow;
3528 xdr_decode_hyper(p, res);
3529 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3530 }
3531 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3532 return status;
3533 out_overflow:
3534 print_overflow_msg(__func__, xdr);
3535 return -EIO;
3536 }
3537
3538 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3539 {
3540 __be32 *p;
3541 int status = 0;
3542
3543 *res = 0;
3544 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3545 return -EIO;
3546 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3547 p = xdr_inline_decode(xdr, 8);
3548 if (unlikely(!p))
3549 goto out_overflow;
3550 xdr_decode_hyper(p, res);
3551 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3552 }
3553 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3554 return status;
3555 out_overflow:
3556 print_overflow_msg(__func__, xdr);
3557 return -EIO;
3558 }
3559
3560 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3561 {
3562 __be32 *p;
3563 int status = 0;
3564
3565 *res = 0;
3566 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3567 return -EIO;
3568 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3569 p = xdr_inline_decode(xdr, 8);
3570 if (unlikely(!p))
3571 goto out_overflow;
3572 xdr_decode_hyper(p, res);
3573 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3574 }
3575 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3576 return status;
3577 out_overflow:
3578 print_overflow_msg(__func__, xdr);
3579 return -EIO;
3580 }
3581
3582 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3583 {
3584 u32 n;
3585 __be32 *p;
3586 int status = 0;
3587
3588 p = xdr_inline_decode(xdr, 4);
3589 if (unlikely(!p))
3590 goto out_overflow;
3591 n = be32_to_cpup(p);
3592 if (n == 0)
3593 goto root_path;
3594 dprintk("pathname4: ");
3595 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3596 dprintk("cannot parse %d components in path\n", n);
3597 goto out_eio;
3598 }
3599 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3600 struct nfs4_string *component = &path->components[path->ncomponents];
3601 status = decode_opaque_inline(xdr, &component->len, &component->data);
3602 if (unlikely(status != 0))
3603 goto out_eio;
3604 ifdebug (XDR)
3605 pr_cont("%s%.*s ",
3606 (path->ncomponents != n ? "/ " : ""),
3607 component->len, component->data);
3608 }
3609 out:
3610 return status;
3611 root_path:
3612 /* a root pathname is sent as a zero component4 */
3613 path->ncomponents = 1;
3614 path->components[0].len=0;
3615 path->components[0].data=NULL;
3616 dprintk("pathname4: /\n");
3617 goto out;
3618 out_eio:
3619 dprintk(" status %d", status);
3620 status = -EIO;
3621 goto out;
3622 out_overflow:
3623 print_overflow_msg(__func__, xdr);
3624 return -EIO;
3625 }
3626
3627 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3628 {
3629 int n;
3630 __be32 *p;
3631 int status = -EIO;
3632
3633 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3634 goto out;
3635 status = 0;
3636 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3637 goto out;
3638 status = -EIO;
3639 /* Ignore borken servers that return unrequested attrs */
3640 if (unlikely(res == NULL))
3641 goto out;
3642 dprintk("%s: fsroot:\n", __func__);
3643 status = decode_pathname(xdr, &res->fs_path);
3644 if (unlikely(status != 0))
3645 goto out;
3646 p = xdr_inline_decode(xdr, 4);
3647 if (unlikely(!p))
3648 goto out_overflow;
3649 n = be32_to_cpup(p);
3650 if (n <= 0)
3651 goto out_eio;
3652 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3653 u32 m;
3654 struct nfs4_fs_location *loc;
3655
3656 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3657 break;
3658 loc = &res->locations[res->nlocations];
3659 p = xdr_inline_decode(xdr, 4);
3660 if (unlikely(!p))
3661 goto out_overflow;
3662 m = be32_to_cpup(p);
3663
3664 dprintk("%s: servers:\n", __func__);
3665 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3666 struct nfs4_string *server;
3667
3668 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3669 unsigned int i;
3670 dprintk("%s: using first %u of %u servers "
3671 "returned for location %u\n",
3672 __func__,
3673 NFS4_FS_LOCATION_MAXSERVERS,
3674 m, res->nlocations);
3675 for (i = loc->nservers; i < m; i++) {
3676 unsigned int len;
3677 char *data;
3678 status = decode_opaque_inline(xdr, &len, &data);
3679 if (unlikely(status != 0))
3680 goto out_eio;
3681 }
3682 break;
3683 }
3684 server = &loc->servers[loc->nservers];
3685 status = decode_opaque_inline(xdr, &server->len, &server->data);
3686 if (unlikely(status != 0))
3687 goto out_eio;
3688 dprintk("%s ", server->data);
3689 }
3690 status = decode_pathname(xdr, &loc->rootpath);
3691 if (unlikely(status != 0))
3692 goto out_eio;
3693 }
3694 if (res->nlocations != 0)
3695 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3696 out:
3697 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3698 return status;
3699 out_overflow:
3700 print_overflow_msg(__func__, xdr);
3701 out_eio:
3702 status = -EIO;
3703 goto out;
3704 }
3705
3706 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3707 {
3708 __be32 *p;
3709 int status = 0;
3710
3711 *res = 0;
3712 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3713 return -EIO;
3714 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3715 p = xdr_inline_decode(xdr, 8);
3716 if (unlikely(!p))
3717 goto out_overflow;
3718 xdr_decode_hyper(p, res);
3719 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3720 }
3721 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3722 return status;
3723 out_overflow:
3724 print_overflow_msg(__func__, xdr);
3725 return -EIO;
3726 }
3727
3728 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3729 {
3730 __be32 *p;
3731 int status = 0;
3732
3733 *maxlink = 1;
3734 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3735 return -EIO;
3736 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3737 p = xdr_inline_decode(xdr, 4);
3738 if (unlikely(!p))
3739 goto out_overflow;
3740 *maxlink = be32_to_cpup(p);
3741 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3742 }
3743 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3744 return status;
3745 out_overflow:
3746 print_overflow_msg(__func__, xdr);
3747 return -EIO;
3748 }
3749
3750 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3751 {
3752 __be32 *p;
3753 int status = 0;
3754
3755 *maxname = 1024;
3756 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3757 return -EIO;
3758 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3759 p = xdr_inline_decode(xdr, 4);
3760 if (unlikely(!p))
3761 goto out_overflow;
3762 *maxname = be32_to_cpup(p);
3763 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3764 }
3765 dprintk("%s: maxname=%u\n", __func__, *maxname);
3766 return status;
3767 out_overflow:
3768 print_overflow_msg(__func__, xdr);
3769 return -EIO;
3770 }
3771
3772 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3773 {
3774 __be32 *p;
3775 int status = 0;
3776
3777 *res = 1024;
3778 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3779 return -EIO;
3780 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3781 uint64_t maxread;
3782 p = xdr_inline_decode(xdr, 8);
3783 if (unlikely(!p))
3784 goto out_overflow;
3785 xdr_decode_hyper(p, &maxread);
3786 if (maxread > 0x7FFFFFFF)
3787 maxread = 0x7FFFFFFF;
3788 *res = (uint32_t)maxread;
3789 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3790 }
3791 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3792 return status;
3793 out_overflow:
3794 print_overflow_msg(__func__, xdr);
3795 return -EIO;
3796 }
3797
3798 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3799 {
3800 __be32 *p;
3801 int status = 0;
3802
3803 *res = 1024;
3804 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3805 return -EIO;
3806 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3807 uint64_t maxwrite;
3808 p = xdr_inline_decode(xdr, 8);
3809 if (unlikely(!p))
3810 goto out_overflow;
3811 xdr_decode_hyper(p, &maxwrite);
3812 if (maxwrite > 0x7FFFFFFF)
3813 maxwrite = 0x7FFFFFFF;
3814 *res = (uint32_t)maxwrite;
3815 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3816 }
3817 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3818 return status;
3819 out_overflow:
3820 print_overflow_msg(__func__, xdr);
3821 return -EIO;
3822 }
3823
3824 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3825 {
3826 uint32_t tmp;
3827 __be32 *p;
3828 int ret = 0;
3829
3830 *mode = 0;
3831 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3832 return -EIO;
3833 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3834 p = xdr_inline_decode(xdr, 4);
3835 if (unlikely(!p))
3836 goto out_overflow;
3837 tmp = be32_to_cpup(p);
3838 *mode = tmp & ~S_IFMT;
3839 bitmap[1] &= ~FATTR4_WORD1_MODE;
3840 ret = NFS_ATTR_FATTR_MODE;
3841 }
3842 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3843 return ret;
3844 out_overflow:
3845 print_overflow_msg(__func__, xdr);
3846 return -EIO;
3847 }
3848
3849 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3850 {
3851 __be32 *p;
3852 int ret = 0;
3853
3854 *nlink = 1;
3855 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3856 return -EIO;
3857 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3858 p = xdr_inline_decode(xdr, 4);
3859 if (unlikely(!p))
3860 goto out_overflow;
3861 *nlink = be32_to_cpup(p);
3862 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3863 ret = NFS_ATTR_FATTR_NLINK;
3864 }
3865 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3866 return ret;
3867 out_overflow:
3868 print_overflow_msg(__func__, xdr);
3869 return -EIO;
3870 }
3871
3872 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3873 const struct nfs_server *server, kuid_t *uid,
3874 struct nfs4_string *owner_name)
3875 {
3876 uint32_t len;
3877 __be32 *p;
3878 int ret = 0;
3879
3880 *uid = make_kuid(&init_user_ns, -2);
3881 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3882 return -EIO;
3883 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3884 p = xdr_inline_decode(xdr, 4);
3885 if (unlikely(!p))
3886 goto out_overflow;
3887 len = be32_to_cpup(p);
3888 p = xdr_inline_decode(xdr, len);
3889 if (unlikely(!p))
3890 goto out_overflow;
3891 if (owner_name != NULL) {
3892 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3893 if (owner_name->data != NULL) {
3894 owner_name->len = len;
3895 ret = NFS_ATTR_FATTR_OWNER_NAME;
3896 }
3897 } else if (len < XDR_MAX_NETOBJ) {
3898 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3899 ret = NFS_ATTR_FATTR_OWNER;
3900 else
3901 dprintk("%s: nfs_map_name_to_uid failed!\n",
3902 __func__);
3903 } else
3904 dprintk("%s: name too long (%u)!\n",
3905 __func__, len);
3906 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3907 }
3908 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3909 return ret;
3910 out_overflow:
3911 print_overflow_msg(__func__, xdr);
3912 return -EIO;
3913 }
3914
3915 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3916 const struct nfs_server *server, kgid_t *gid,
3917 struct nfs4_string *group_name)
3918 {
3919 uint32_t len;
3920 __be32 *p;
3921 int ret = 0;
3922
3923 *gid = make_kgid(&init_user_ns, -2);
3924 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3925 return -EIO;
3926 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3927 p = xdr_inline_decode(xdr, 4);
3928 if (unlikely(!p))
3929 goto out_overflow;
3930 len = be32_to_cpup(p);
3931 p = xdr_inline_decode(xdr, len);
3932 if (unlikely(!p))
3933 goto out_overflow;
3934 if (group_name != NULL) {
3935 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3936 if (group_name->data != NULL) {
3937 group_name->len = len;
3938 ret = NFS_ATTR_FATTR_GROUP_NAME;
3939 }
3940 } else if (len < XDR_MAX_NETOBJ) {
3941 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3942 ret = NFS_ATTR_FATTR_GROUP;
3943 else
3944 dprintk("%s: nfs_map_group_to_gid failed!\n",
3945 __func__);
3946 } else
3947 dprintk("%s: name too long (%u)!\n",
3948 __func__, len);
3949 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3950 }
3951 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3952 return ret;
3953 out_overflow:
3954 print_overflow_msg(__func__, xdr);
3955 return -EIO;
3956 }
3957
3958 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3959 {
3960 uint32_t major = 0, minor = 0;
3961 __be32 *p;
3962 int ret = 0;
3963
3964 *rdev = MKDEV(0,0);
3965 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3966 return -EIO;
3967 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3968 dev_t tmp;
3969
3970 p = xdr_inline_decode(xdr, 8);
3971 if (unlikely(!p))
3972 goto out_overflow;
3973 major = be32_to_cpup(p++);
3974 minor = be32_to_cpup(p);
3975 tmp = MKDEV(major, minor);
3976 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3977 *rdev = tmp;
3978 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3979 ret = NFS_ATTR_FATTR_RDEV;
3980 }
3981 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3982 return ret;
3983 out_overflow:
3984 print_overflow_msg(__func__, xdr);
3985 return -EIO;
3986 }
3987
3988 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3989 {
3990 __be32 *p;
3991 int status = 0;
3992
3993 *res = 0;
3994 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3995 return -EIO;
3996 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3997 p = xdr_inline_decode(xdr, 8);
3998 if (unlikely(!p))
3999 goto out_overflow;
4000 xdr_decode_hyper(p, res);
4001 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4002 }
4003 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4004 return status;
4005 out_overflow:
4006 print_overflow_msg(__func__, xdr);
4007 return -EIO;
4008 }
4009
4010 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4011 {
4012 __be32 *p;
4013 int status = 0;
4014
4015 *res = 0;
4016 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4017 return -EIO;
4018 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4019 p = xdr_inline_decode(xdr, 8);
4020 if (unlikely(!p))
4021 goto out_overflow;
4022 xdr_decode_hyper(p, res);
4023 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4024 }
4025 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4026 return status;
4027 out_overflow:
4028 print_overflow_msg(__func__, xdr);
4029 return -EIO;
4030 }
4031
4032 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4033 {
4034 __be32 *p;
4035 int status = 0;
4036
4037 *res = 0;
4038 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4039 return -EIO;
4040 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4041 p = xdr_inline_decode(xdr, 8);
4042 if (unlikely(!p))
4043 goto out_overflow;
4044 xdr_decode_hyper(p, res);
4045 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4046 }
4047 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4048 return status;
4049 out_overflow:
4050 print_overflow_msg(__func__, xdr);
4051 return -EIO;
4052 }
4053
4054 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4055 {
4056 __be32 *p;
4057 int ret = 0;
4058
4059 *used = 0;
4060 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4061 return -EIO;
4062 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4063 p = xdr_inline_decode(xdr, 8);
4064 if (unlikely(!p))
4065 goto out_overflow;
4066 xdr_decode_hyper(p, used);
4067 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4068 ret = NFS_ATTR_FATTR_SPACE_USED;
4069 }
4070 dprintk("%s: space used=%Lu\n", __func__,
4071 (unsigned long long)*used);
4072 return ret;
4073 out_overflow:
4074 print_overflow_msg(__func__, xdr);
4075 return -EIO;
4076 }
4077
4078 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4079 {
4080 __be32 *p;
4081 uint64_t sec;
4082 uint32_t nsec;
4083
4084 p = xdr_inline_decode(xdr, 12);
4085 if (unlikely(!p))
4086 goto out_overflow;
4087 p = xdr_decode_hyper(p, &sec);
4088 nsec = be32_to_cpup(p);
4089 time->tv_sec = (time_t)sec;
4090 time->tv_nsec = (long)nsec;
4091 return 0;
4092 out_overflow:
4093 print_overflow_msg(__func__, xdr);
4094 return -EIO;
4095 }
4096
4097 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4098 {
4099 int status = 0;
4100
4101 time->tv_sec = 0;
4102 time->tv_nsec = 0;
4103 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4104 return -EIO;
4105 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4106 status = decode_attr_time(xdr, time);
4107 if (status == 0)
4108 status = NFS_ATTR_FATTR_ATIME;
4109 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4110 }
4111 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4112 return status;
4113 }
4114
4115 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4116 {
4117 int status = 0;
4118
4119 time->tv_sec = 0;
4120 time->tv_nsec = 0;
4121 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4122 return -EIO;
4123 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4124 status = decode_attr_time(xdr, time);
4125 if (status == 0)
4126 status = NFS_ATTR_FATTR_CTIME;
4127 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4128 }
4129 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4130 return status;
4131 }
4132
4133 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4134 struct timespec *time)
4135 {
4136 int status = 0;
4137
4138 time->tv_sec = 0;
4139 time->tv_nsec = 0;
4140 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4141 return -EIO;
4142 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4143 status = decode_attr_time(xdr, time);
4144 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4145 }
4146 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4147 (long)time->tv_nsec);
4148 return status;
4149 }
4150
4151 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4152 struct nfs4_label *label)
4153 {
4154 uint32_t pi = 0;
4155 uint32_t lfs = 0;
4156 __u32 len;
4157 __be32 *p;
4158 int status = 0;
4159
4160 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4161 return -EIO;
4162 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4163 p = xdr_inline_decode(xdr, 4);
4164 if (unlikely(!p))
4165 goto out_overflow;
4166 lfs = be32_to_cpup(p++);
4167 p = xdr_inline_decode(xdr, 4);
4168 if (unlikely(!p))
4169 goto out_overflow;
4170 pi = be32_to_cpup(p++);
4171 p = xdr_inline_decode(xdr, 4);
4172 if (unlikely(!p))
4173 goto out_overflow;
4174 len = be32_to_cpup(p++);
4175 p = xdr_inline_decode(xdr, len);
4176 if (unlikely(!p))
4177 goto out_overflow;
4178 if (len < NFS4_MAXLABELLEN) {
4179 if (label) {
4180 memcpy(label->label, p, len);
4181 label->len = len;
4182 label->pi = pi;
4183 label->lfs = lfs;
4184 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4185 }
4186 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4187 } else
4188 printk(KERN_WARNING "%s: label too long (%u)!\n",
4189 __func__, len);
4190 }
4191 if (label && label->label)
4192 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4193 (char *)label->label, label->len, label->pi, label->lfs);
4194 return status;
4195
4196 out_overflow:
4197 print_overflow_msg(__func__, xdr);
4198 return -EIO;
4199 }
4200
4201 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4202 {
4203 int status = 0;
4204
4205 time->tv_sec = 0;
4206 time->tv_nsec = 0;
4207 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4208 return -EIO;
4209 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4210 status = decode_attr_time(xdr, time);
4211 if (status == 0)
4212 status = NFS_ATTR_FATTR_MTIME;
4213 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4214 }
4215 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4216 return status;
4217 }
4218
4219 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4220 {
4221 unsigned int attrwords = XDR_QUADLEN(attrlen);
4222 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4223
4224 if (unlikely(attrwords != nwords)) {
4225 dprintk("%s: server returned incorrect attribute length: "
4226 "%u %c %u\n",
4227 __func__,
4228 attrwords << 2,
4229 (attrwords < nwords) ? '<' : '>',
4230 nwords << 2);
4231 return -EIO;
4232 }
4233 return 0;
4234 }
4235
4236 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4237 {
4238 __be32 *p;
4239
4240 p = xdr_inline_decode(xdr, 20);
4241 if (unlikely(!p))
4242 goto out_overflow;
4243 cinfo->atomic = be32_to_cpup(p++);
4244 p = xdr_decode_hyper(p, &cinfo->before);
4245 xdr_decode_hyper(p, &cinfo->after);
4246 return 0;
4247 out_overflow:
4248 print_overflow_msg(__func__, xdr);
4249 return -EIO;
4250 }
4251
4252 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4253 {
4254 __be32 *p;
4255 uint32_t supp, acc;
4256 int status;
4257
4258 status = decode_op_hdr(xdr, OP_ACCESS);
4259 if (status)
4260 return status;
4261 p = xdr_inline_decode(xdr, 8);
4262 if (unlikely(!p))
4263 goto out_overflow;
4264 supp = be32_to_cpup(p++);
4265 acc = be32_to_cpup(p);
4266 *supported = supp;
4267 *access = acc;
4268 return 0;
4269 out_overflow:
4270 print_overflow_msg(__func__, xdr);
4271 return -EIO;
4272 }
4273
4274 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4275 {
4276 __be32 *p;
4277
4278 p = xdr_inline_decode(xdr, len);
4279 if (likely(p)) {
4280 memcpy(buf, p, len);
4281 return 0;
4282 }
4283 print_overflow_msg(__func__, xdr);
4284 return -EIO;
4285 }
4286
4287 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288 {
4289 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4290 }
4291
4292 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4293 {
4294 int status;
4295
4296 status = decode_op_hdr(xdr, OP_CLOSE);
4297 if (status != -EIO)
4298 nfs_increment_open_seqid(status, res->seqid);
4299 if (!status)
4300 status = decode_stateid(xdr, &res->stateid);
4301 return status;
4302 }
4303
4304 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4305 {
4306 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4307 }
4308
4309 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4310 {
4311 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4312 }
4313
4314 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4315 {
4316 int status;
4317
4318 status = decode_op_hdr(xdr, OP_COMMIT);
4319 if (!status)
4320 status = decode_write_verifier(xdr, &res->verf->verifier);
4321 return status;
4322 }
4323
4324 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4325 {
4326 __be32 *p;
4327 uint32_t bmlen;
4328 int status;
4329
4330 status = decode_op_hdr(xdr, OP_CREATE);
4331 if (status)
4332 return status;
4333 if ((status = decode_change_info(xdr, cinfo)))
4334 return status;
4335 p = xdr_inline_decode(xdr, 4);
4336 if (unlikely(!p))
4337 goto out_overflow;
4338 bmlen = be32_to_cpup(p);
4339 p = xdr_inline_decode(xdr, bmlen << 2);
4340 if (likely(p))
4341 return 0;
4342 out_overflow:
4343 print_overflow_msg(__func__, xdr);
4344 return -EIO;
4345 }
4346
4347 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4348 {
4349 unsigned int savep;
4350 uint32_t attrlen, bitmap[3] = {0};
4351 int status;
4352
4353 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4354 goto xdr_error;
4355 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4356 goto xdr_error;
4357 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4360 goto xdr_error;
4361 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4362 &res->fh_expire_type)) != 0)
4363 goto xdr_error;
4364 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4365 goto xdr_error;
4366 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4369 goto xdr_error;
4370 status = verify_attr_len(xdr, savep, attrlen);
4371 xdr_error:
4372 dprintk("%s: xdr returned %d!\n", __func__, -status);
4373 return status;
4374 }
4375
4376 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4377 {
4378 unsigned int savep;
4379 uint32_t attrlen, bitmap[3] = {0};
4380 int status;
4381
4382 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4387 goto xdr_error;
4388
4389 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4398 goto xdr_error;
4399 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4400 goto xdr_error;
4401
4402 status = verify_attr_len(xdr, savep, attrlen);
4403 xdr_error:
4404 dprintk("%s: xdr returned %d!\n", __func__, -status);
4405 return status;
4406 }
4407
4408 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4409 {
4410 unsigned int savep;
4411 uint32_t attrlen, bitmap[3] = {0};
4412 int status;
4413
4414 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4415 goto xdr_error;
4416 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4417 goto xdr_error;
4418 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4419 goto xdr_error;
4420
4421 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4422 goto xdr_error;
4423 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4424 goto xdr_error;
4425
4426 status = verify_attr_len(xdr, savep, attrlen);
4427 xdr_error:
4428 dprintk("%s: xdr returned %d!\n", __func__, -status);
4429 return status;
4430 }
4431
4432 static int decode_threshold_hint(struct xdr_stream *xdr,
4433 uint32_t *bitmap,
4434 uint64_t *res,
4435 uint32_t hint_bit)
4436 {
4437 __be32 *p;
4438
4439 *res = 0;
4440 if (likely(bitmap[0] & hint_bit)) {
4441 p = xdr_inline_decode(xdr, 8);
4442 if (unlikely(!p))
4443 goto out_overflow;
4444 xdr_decode_hyper(p, res);
4445 }
4446 return 0;
4447 out_overflow:
4448 print_overflow_msg(__func__, xdr);
4449 return -EIO;
4450 }
4451
4452 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4453 struct nfs4_threshold *res)
4454 {
4455 __be32 *p;
4456 unsigned int savep;
4457 uint32_t bitmap[3] = {0,}, attrlen;
4458 int status;
4459
4460 /* layout type */
4461 p = xdr_inline_decode(xdr, 4);
4462 if (unlikely(!p)) {
4463 print_overflow_msg(__func__, xdr);
4464 return -EIO;
4465 }
4466 res->l_type = be32_to_cpup(p);
4467
4468 /* thi_hintset bitmap */
4469 status = decode_attr_bitmap(xdr, bitmap);
4470 if (status < 0)
4471 goto xdr_error;
4472
4473 /* thi_hintlist length */
4474 status = decode_attr_length(xdr, &attrlen, &savep);
4475 if (status < 0)
4476 goto xdr_error;
4477 /* thi_hintlist */
4478 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4479 if (status < 0)
4480 goto xdr_error;
4481 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4482 if (status < 0)
4483 goto xdr_error;
4484 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4485 THRESHOLD_RD_IO);
4486 if (status < 0)
4487 goto xdr_error;
4488 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4489 THRESHOLD_WR_IO);
4490 if (status < 0)
4491 goto xdr_error;
4492
4493 status = verify_attr_len(xdr, savep, attrlen);
4494 res->bm = bitmap[0];
4495
4496 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4497 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4498 res->wr_io_sz);
4499 xdr_error:
4500 dprintk("%s ret=%d!\n", __func__, status);
4501 return status;
4502 }
4503
4504 /*
4505 * Thresholds on pNFS direct I/O vrs MDS I/O
4506 */
4507 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4508 uint32_t *bitmap,
4509 struct nfs4_threshold *res)
4510 {
4511 __be32 *p;
4512 int status = 0;
4513 uint32_t num;
4514
4515 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4516 return -EIO;
4517 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4518 /* Did the server return an unrequested attribute? */
4519 if (unlikely(res == NULL))
4520 return -EREMOTEIO;
4521 p = xdr_inline_decode(xdr, 4);
4522 if (unlikely(!p))
4523 goto out_overflow;
4524 num = be32_to_cpup(p);
4525 if (num == 0)
4526 return 0;
4527 if (num > 1)
4528 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4529 "drivers per filesystem not supported\n",
4530 __func__);
4531
4532 status = decode_first_threshold_item4(xdr, res);
4533 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4534 }
4535 return status;
4536 out_overflow:
4537 print_overflow_msg(__func__, xdr);
4538 return -EIO;
4539 }
4540
4541 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4542 struct nfs_fattr *fattr, struct nfs_fh *fh,
4543 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4544 const struct nfs_server *server)
4545 {
4546 int status;
4547 umode_t fmode = 0;
4548 uint32_t type;
4549 int32_t err;
4550
4551 status = decode_attr_type(xdr, bitmap, &type);
4552 if (status < 0)
4553 goto xdr_error;
4554 fattr->mode = 0;
4555 if (status != 0) {
4556 fattr->mode |= nfs_type2fmt[type];
4557 fattr->valid |= status;
4558 }
4559
4560 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4561 if (status < 0)
4562 goto xdr_error;
4563 fattr->valid |= status;
4564
4565 status = decode_attr_size(xdr, bitmap, &fattr->size);
4566 if (status < 0)
4567 goto xdr_error;
4568 fattr->valid |= status;
4569
4570 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4571 if (status < 0)
4572 goto xdr_error;
4573 fattr->valid |= status;
4574
4575 err = 0;
4576 status = decode_attr_error(xdr, bitmap, &err);
4577 if (status < 0)
4578 goto xdr_error;
4579
4580 status = decode_attr_filehandle(xdr, bitmap, fh);
4581 if (status < 0)
4582 goto xdr_error;
4583
4584 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4585 if (status < 0)
4586 goto xdr_error;
4587 fattr->valid |= status;
4588
4589 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4590 if (status < 0)
4591 goto xdr_error;
4592 fattr->valid |= status;
4593
4594 status = decode_attr_mode(xdr, bitmap, &fmode);
4595 if (status < 0)
4596 goto xdr_error;
4597 if (status != 0) {
4598 fattr->mode |= fmode;
4599 fattr->valid |= status;
4600 }
4601
4602 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4603 if (status < 0)
4604 goto xdr_error;
4605 fattr->valid |= status;
4606
4607 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4623 if (status < 0)
4624 goto xdr_error;
4625 fattr->valid |= status;
4626
4627 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4628 if (status < 0)
4629 goto xdr_error;
4630 fattr->valid |= status;
4631
4632 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4633 if (status < 0)
4634 goto xdr_error;
4635 fattr->valid |= status;
4636
4637 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4638 if (status < 0)
4639 goto xdr_error;
4640 fattr->valid |= status;
4641
4642 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4643 if (status < 0)
4644 goto xdr_error;
4645 fattr->valid |= status;
4646
4647 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4648 if (status < 0)
4649 goto xdr_error;
4650
4651 if (label) {
4652 status = decode_attr_security_label(xdr, bitmap, label);
4653 if (status < 0)
4654 goto xdr_error;
4655 fattr->valid |= status;
4656 }
4657
4658 xdr_error:
4659 dprintk("%s: xdr returned %d\n", __func__, -status);
4660 return status;
4661 }
4662
4663 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4664 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4665 struct nfs4_label *label, const struct nfs_server *server)
4666 {
4667 unsigned int savep;
4668 uint32_t attrlen,
4669 bitmap[3] = {0};
4670 int status;
4671
4672 status = decode_op_hdr(xdr, OP_GETATTR);
4673 if (status < 0)
4674 goto xdr_error;
4675
4676 status = decode_attr_bitmap(xdr, bitmap);
4677 if (status < 0)
4678 goto xdr_error;
4679
4680 status = decode_attr_length(xdr, &attrlen, &savep);
4681 if (status < 0)
4682 goto xdr_error;
4683
4684 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4685 label, server);
4686 if (status < 0)
4687 goto xdr_error;
4688
4689 status = verify_attr_len(xdr, savep, attrlen);
4690 xdr_error:
4691 dprintk("%s: xdr returned %d\n", __func__, -status);
4692 return status;
4693 }
4694
4695 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4696 struct nfs4_label *label, const struct nfs_server *server)
4697 {
4698 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4699 }
4700
4701 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4702 const struct nfs_server *server)
4703 {
4704 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4705 }
4706
4707 /*
4708 * Decode potentially multiple layout types. Currently we only support
4709 * one layout driver per file system.
4710 */
4711 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4712 uint32_t *layouttype)
4713 {
4714 __be32 *p;
4715 int num;
4716
4717 p = xdr_inline_decode(xdr, 4);
4718 if (unlikely(!p))
4719 goto out_overflow;
4720 num = be32_to_cpup(p);
4721
4722 /* pNFS is not supported by the underlying file system */
4723 if (num == 0) {
4724 *layouttype = 0;
4725 return 0;
4726 }
4727 if (num > 1)
4728 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4729 "drivers per filesystem not supported\n", __func__);
4730
4731 /* Decode and set first layout type, move xdr->p past unused types */
4732 p = xdr_inline_decode(xdr, num * 4);
4733 if (unlikely(!p))
4734 goto out_overflow;
4735 *layouttype = be32_to_cpup(p);
4736 return 0;
4737 out_overflow:
4738 print_overflow_msg(__func__, xdr);
4739 return -EIO;
4740 }
4741
4742 /*
4743 * The type of file system exported.
4744 * Note we must ensure that layouttype is set in any non-error case.
4745 */
4746 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4747 uint32_t *layouttype)
4748 {
4749 int status = 0;
4750
4751 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4752 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4753 return -EIO;
4754 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4755 status = decode_first_pnfs_layout_type(xdr, layouttype);
4756 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4757 } else
4758 *layouttype = 0;
4759 return status;
4760 }
4761
4762 /*
4763 * The prefered block size for layout directed io
4764 */
4765 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4766 uint32_t *res)
4767 {
4768 __be32 *p;
4769
4770 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4771 *res = 0;
4772 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4773 p = xdr_inline_decode(xdr, 4);
4774 if (unlikely(!p)) {
4775 print_overflow_msg(__func__, xdr);
4776 return -EIO;
4777 }
4778 *res = be32_to_cpup(p);
4779 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4780 }
4781 return 0;
4782 }
4783
4784 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4785 {
4786 unsigned int savep;
4787 uint32_t attrlen, bitmap[3];
4788 int status;
4789
4790 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4791 goto xdr_error;
4792 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4793 goto xdr_error;
4794 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4795 goto xdr_error;
4796
4797 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4798
4799 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4800 goto xdr_error;
4801 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4802 goto xdr_error;
4803 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4804 goto xdr_error;
4805 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4806 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4807 goto xdr_error;
4808 fsinfo->wtpref = fsinfo->wtmax;
4809 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4810 if (status != 0)
4811 goto xdr_error;
4812 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4813 if (status != 0)
4814 goto xdr_error;
4815 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4816 if (status)
4817 goto xdr_error;
4818
4819 status = verify_attr_len(xdr, savep, attrlen);
4820 xdr_error:
4821 dprintk("%s: xdr returned %d!\n", __func__, -status);
4822 return status;
4823 }
4824
4825 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4826 {
4827 __be32 *p;
4828 uint32_t len;
4829 int status;
4830
4831 /* Zero handle first to allow comparisons */
4832 memset(fh, 0, sizeof(*fh));
4833
4834 status = decode_op_hdr(xdr, OP_GETFH);
4835 if (status)
4836 return status;
4837
4838 p = xdr_inline_decode(xdr, 4);
4839 if (unlikely(!p))
4840 goto out_overflow;
4841 len = be32_to_cpup(p);
4842 if (len > NFS4_FHSIZE)
4843 return -EIO;
4844 fh->size = len;
4845 p = xdr_inline_decode(xdr, len);
4846 if (unlikely(!p))
4847 goto out_overflow;
4848 memcpy(fh->data, p, len);
4849 return 0;
4850 out_overflow:
4851 print_overflow_msg(__func__, xdr);
4852 return -EIO;
4853 }
4854
4855 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4856 {
4857 int status;
4858
4859 status = decode_op_hdr(xdr, OP_LINK);
4860 if (status)
4861 return status;
4862 return decode_change_info(xdr, cinfo);
4863 }
4864
4865 /*
4866 * We create the owner, so we know a proper owner.id length is 4.
4867 */
4868 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4869 {
4870 uint64_t offset, length, clientid;
4871 __be32 *p;
4872 uint32_t namelen, type;
4873
4874 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4875 if (unlikely(!p))
4876 goto out_overflow;
4877 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4878 p = xdr_decode_hyper(p, &length);
4879 type = be32_to_cpup(p++); /* 4 byte read */
4880 if (fl != NULL) { /* manipulate file lock */
4881 fl->fl_start = (loff_t)offset;
4882 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4883 if (length == ~(uint64_t)0)
4884 fl->fl_end = OFFSET_MAX;
4885 fl->fl_type = F_WRLCK;
4886 if (type & 1)
4887 fl->fl_type = F_RDLCK;
4888 fl->fl_pid = 0;
4889 }
4890 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4891 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4892 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4893 if (likely(p))
4894 return -NFS4ERR_DENIED;
4895 out_overflow:
4896 print_overflow_msg(__func__, xdr);
4897 return -EIO;
4898 }
4899
4900 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4901 {
4902 int status;
4903
4904 status = decode_op_hdr(xdr, OP_LOCK);
4905 if (status == -EIO)
4906 goto out;
4907 if (status == 0) {
4908 status = decode_stateid(xdr, &res->stateid);
4909 if (unlikely(status))
4910 goto out;
4911 } else if (status == -NFS4ERR_DENIED)
4912 status = decode_lock_denied(xdr, NULL);
4913 if (res->open_seqid != NULL)
4914 nfs_increment_open_seqid(status, res->open_seqid);
4915 nfs_increment_lock_seqid(status, res->lock_seqid);
4916 out:
4917 return status;
4918 }
4919
4920 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4921 {
4922 int status;
4923 status = decode_op_hdr(xdr, OP_LOCKT);
4924 if (status == -NFS4ERR_DENIED)
4925 return decode_lock_denied(xdr, res->denied);
4926 return status;
4927 }
4928
4929 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4930 {
4931 int status;
4932
4933 status = decode_op_hdr(xdr, OP_LOCKU);
4934 if (status != -EIO)
4935 nfs_increment_lock_seqid(status, res->seqid);
4936 if (status == 0)
4937 status = decode_stateid(xdr, &res->stateid);
4938 return status;
4939 }
4940
4941 static int decode_release_lockowner(struct xdr_stream *xdr)
4942 {
4943 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4944 }
4945
4946 static int decode_lookup(struct xdr_stream *xdr)
4947 {
4948 return decode_op_hdr(xdr, OP_LOOKUP);
4949 }
4950
4951 /* This is too sick! */
4952 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4953 {
4954 __be32 *p;
4955 uint32_t limit_type, nblocks, blocksize;
4956
4957 p = xdr_inline_decode(xdr, 12);
4958 if (unlikely(!p))
4959 goto out_overflow;
4960 limit_type = be32_to_cpup(p++);
4961 switch (limit_type) {
4962 case 1:
4963 xdr_decode_hyper(p, maxsize);
4964 break;
4965 case 2:
4966 nblocks = be32_to_cpup(p++);
4967 blocksize = be32_to_cpup(p);
4968 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4969 }
4970 return 0;
4971 out_overflow:
4972 print_overflow_msg(__func__, xdr);
4973 return -EIO;
4974 }
4975
4976 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4977 {
4978 __be32 *p;
4979 uint32_t delegation_type;
4980 int status;
4981
4982 p = xdr_inline_decode(xdr, 4);
4983 if (unlikely(!p))
4984 goto out_overflow;
4985 delegation_type = be32_to_cpup(p);
4986 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4987 res->delegation_type = 0;
4988 return 0;
4989 }
4990 status = decode_stateid(xdr, &res->delegation);
4991 if (unlikely(status))
4992 return status;
4993 p = xdr_inline_decode(xdr, 4);
4994 if (unlikely(!p))
4995 goto out_overflow;
4996 res->do_recall = be32_to_cpup(p);
4997
4998 switch (delegation_type) {
4999 case NFS4_OPEN_DELEGATE_READ:
5000 res->delegation_type = FMODE_READ;
5001 break;
5002 case NFS4_OPEN_DELEGATE_WRITE:
5003 res->delegation_type = FMODE_WRITE|FMODE_READ;
5004 if (decode_space_limit(xdr, &res->maxsize) < 0)
5005 return -EIO;
5006 }
5007 return decode_ace(xdr, NULL, res->server->nfs_client);
5008 out_overflow:
5009 print_overflow_msg(__func__, xdr);
5010 return -EIO;
5011 }
5012
5013 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5014 {
5015 __be32 *p;
5016 uint32_t savewords, bmlen, i;
5017 int status;
5018
5019 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5020 return status;
5021 nfs_increment_open_seqid(status, res->seqid);
5022 if (status)
5023 return status;
5024 status = decode_stateid(xdr, &res->stateid);
5025 if (unlikely(status))
5026 return status;
5027
5028 decode_change_info(xdr, &res->cinfo);
5029
5030 p = xdr_inline_decode(xdr, 8);
5031 if (unlikely(!p))
5032 goto out_overflow;
5033 res->rflags = be32_to_cpup(p++);
5034 bmlen = be32_to_cpup(p);
5035 if (bmlen > 10)
5036 goto xdr_error;
5037
5038 p = xdr_inline_decode(xdr, bmlen << 2);
5039 if (unlikely(!p))
5040 goto out_overflow;
5041 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5042 for (i = 0; i < savewords; ++i)
5043 res->attrset[i] = be32_to_cpup(p++);
5044 for (; i < NFS4_BITMAP_SIZE; i++)
5045 res->attrset[i] = 0;
5046
5047 return decode_delegation(xdr, res);
5048 xdr_error:
5049 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5050 return -EIO;
5051 out_overflow:
5052 print_overflow_msg(__func__, xdr);
5053 return -EIO;
5054 }
5055
5056 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5057 {
5058 int status;
5059
5060 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5061 if (status != -EIO)
5062 nfs_increment_open_seqid(status, res->seqid);
5063 if (!status)
5064 status = decode_stateid(xdr, &res->stateid);
5065 return status;
5066 }
5067
5068 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5069 {
5070 int status;
5071
5072 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5073 if (status != -EIO)
5074 nfs_increment_open_seqid(status, res->seqid);
5075 if (!status)
5076 status = decode_stateid(xdr, &res->stateid);
5077 return status;
5078 }
5079
5080 static int decode_putfh(struct xdr_stream *xdr)
5081 {
5082 return decode_op_hdr(xdr, OP_PUTFH);
5083 }
5084
5085 static int decode_putrootfh(struct xdr_stream *xdr)
5086 {
5087 return decode_op_hdr(xdr, OP_PUTROOTFH);
5088 }
5089
5090 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5091 struct nfs_pgio_res *res)
5092 {
5093 __be32 *p;
5094 uint32_t count, eof, recvd;
5095 int status;
5096
5097 status = decode_op_hdr(xdr, OP_READ);
5098 if (status)
5099 return status;
5100 p = xdr_inline_decode(xdr, 8);
5101 if (unlikely(!p))
5102 goto out_overflow;
5103 eof = be32_to_cpup(p++);
5104 count = be32_to_cpup(p);
5105 recvd = xdr_read_pages(xdr, count);
5106 if (count > recvd) {
5107 dprintk("NFS: server cheating in read reply: "
5108 "count %u > recvd %u\n", count, recvd);
5109 count = recvd;
5110 eof = 0;
5111 }
5112 res->eof = eof;
5113 res->count = count;
5114 return 0;
5115 out_overflow:
5116 print_overflow_msg(__func__, xdr);
5117 return -EIO;
5118 }
5119
5120 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5121 {
5122 int status;
5123 __be32 verf[2];
5124
5125 status = decode_op_hdr(xdr, OP_READDIR);
5126 if (!status)
5127 status = decode_verifier(xdr, readdir->verifier.data);
5128 if (unlikely(status))
5129 return status;
5130 memcpy(verf, readdir->verifier.data, sizeof(verf));
5131 dprintk("%s: verifier = %08x:%08x\n",
5132 __func__, verf[0], verf[1]);
5133 return xdr_read_pages(xdr, xdr->buf->page_len);
5134 }
5135
5136 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5137 {
5138 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5139 u32 len, recvd;
5140 __be32 *p;
5141 int status;
5142
5143 status = decode_op_hdr(xdr, OP_READLINK);
5144 if (status)
5145 return status;
5146
5147 /* Convert length of symlink */
5148 p = xdr_inline_decode(xdr, 4);
5149 if (unlikely(!p))
5150 goto out_overflow;
5151 len = be32_to_cpup(p);
5152 if (len >= rcvbuf->page_len || len <= 0) {
5153 dprintk("nfs: server returned giant symlink!\n");
5154 return -ENAMETOOLONG;
5155 }
5156 recvd = xdr_read_pages(xdr, len);
5157 if (recvd < len) {
5158 dprintk("NFS: server cheating in readlink reply: "
5159 "count %u > recvd %u\n", len, recvd);
5160 return -EIO;
5161 }
5162 /*
5163 * The XDR encode routine has set things up so that
5164 * the link text will be copied directly into the
5165 * buffer. We just have to do overflow-checking,
5166 * and and null-terminate the text (the VFS expects
5167 * null-termination).
5168 */
5169 xdr_terminate_string(rcvbuf, len);
5170 return 0;
5171 out_overflow:
5172 print_overflow_msg(__func__, xdr);
5173 return -EIO;
5174 }
5175
5176 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5177 {
5178 int status;
5179
5180 status = decode_op_hdr(xdr, OP_REMOVE);
5181 if (status)
5182 goto out;
5183 status = decode_change_info(xdr, cinfo);
5184 out:
5185 return status;
5186 }
5187
5188 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5189 struct nfs4_change_info *new_cinfo)
5190 {
5191 int status;
5192
5193 status = decode_op_hdr(xdr, OP_RENAME);
5194 if (status)
5195 goto out;
5196 if ((status = decode_change_info(xdr, old_cinfo)))
5197 goto out;
5198 status = decode_change_info(xdr, new_cinfo);
5199 out:
5200 return status;
5201 }
5202
5203 static int decode_renew(struct xdr_stream *xdr)
5204 {
5205 return decode_op_hdr(xdr, OP_RENEW);
5206 }
5207
5208 static int
5209 decode_restorefh(struct xdr_stream *xdr)
5210 {
5211 return decode_op_hdr(xdr, OP_RESTOREFH);
5212 }
5213
5214 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5215 struct nfs_getaclres *res)
5216 {
5217 unsigned int savep;
5218 uint32_t attrlen,
5219 bitmap[3] = {0};
5220 int status;
5221 unsigned int pg_offset;
5222
5223 res->acl_len = 0;
5224 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5225 goto out;
5226
5227 xdr_enter_page(xdr, xdr->buf->page_len);
5228
5229 /* Calculate the offset of the page data */
5230 pg_offset = xdr->buf->head[0].iov_len;
5231
5232 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5233 goto out;
5234 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5235 goto out;
5236
5237 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5238 return -EIO;
5239 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5240
5241 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5242 * are stored with the acl data to handle the problem of
5243 * variable length bitmaps.*/
5244 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5245 res->acl_len = attrlen;
5246
5247 /* Check for receive buffer overflow */
5248 if (res->acl_len > (xdr->nwords << 2) ||
5249 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5250 res->acl_flags |= NFS4_ACL_TRUNC;
5251 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5252 attrlen, xdr->nwords << 2);
5253 }
5254 } else
5255 status = -EOPNOTSUPP;
5256
5257 out:
5258 return status;
5259 }
5260
5261 static int
5262 decode_savefh(struct xdr_stream *xdr)
5263 {
5264 return decode_op_hdr(xdr, OP_SAVEFH);
5265 }
5266
5267 static int decode_setattr(struct xdr_stream *xdr)
5268 {
5269 __be32 *p;
5270 uint32_t bmlen;
5271 int status;
5272
5273 status = decode_op_hdr(xdr, OP_SETATTR);
5274 if (status)
5275 return status;
5276 p = xdr_inline_decode(xdr, 4);
5277 if (unlikely(!p))
5278 goto out_overflow;
5279 bmlen = be32_to_cpup(p);
5280 p = xdr_inline_decode(xdr, bmlen << 2);
5281 if (likely(p))
5282 return 0;
5283 out_overflow:
5284 print_overflow_msg(__func__, xdr);
5285 return -EIO;
5286 }
5287
5288 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5289 {
5290 __be32 *p;
5291 uint32_t opnum;
5292 int32_t nfserr;
5293
5294 p = xdr_inline_decode(xdr, 8);
5295 if (unlikely(!p))
5296 goto out_overflow;
5297 opnum = be32_to_cpup(p++);
5298 if (opnum != OP_SETCLIENTID) {
5299 dprintk("nfs: decode_setclientid: Server returned operation"
5300 " %d\n", opnum);
5301 return -EIO;
5302 }
5303 nfserr = be32_to_cpup(p);
5304 if (nfserr == NFS_OK) {
5305 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5306 if (unlikely(!p))
5307 goto out_overflow;
5308 p = xdr_decode_hyper(p, &res->clientid);
5309 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5310 } else if (nfserr == NFSERR_CLID_INUSE) {
5311 uint32_t len;
5312
5313 /* skip netid string */
5314 p = xdr_inline_decode(xdr, 4);
5315 if (unlikely(!p))
5316 goto out_overflow;
5317 len = be32_to_cpup(p);
5318 p = xdr_inline_decode(xdr, len);
5319 if (unlikely(!p))
5320 goto out_overflow;
5321
5322 /* skip uaddr string */
5323 p = xdr_inline_decode(xdr, 4);
5324 if (unlikely(!p))
5325 goto out_overflow;
5326 len = be32_to_cpup(p);
5327 p = xdr_inline_decode(xdr, len);
5328 if (unlikely(!p))
5329 goto out_overflow;
5330 return -NFSERR_CLID_INUSE;
5331 } else
5332 return nfs4_stat_to_errno(nfserr);
5333
5334 return 0;
5335 out_overflow:
5336 print_overflow_msg(__func__, xdr);
5337 return -EIO;
5338 }
5339
5340 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5341 {
5342 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5343 }
5344
5345 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5346 {
5347 __be32 *p;
5348 int status;
5349
5350 status = decode_op_hdr(xdr, OP_WRITE);
5351 if (status)
5352 return status;
5353
5354 p = xdr_inline_decode(xdr, 8);
5355 if (unlikely(!p))
5356 goto out_overflow;
5357 res->count = be32_to_cpup(p++);
5358 res->verf->committed = be32_to_cpup(p++);
5359 return decode_write_verifier(xdr, &res->verf->verifier);
5360 out_overflow:
5361 print_overflow_msg(__func__, xdr);
5362 return -EIO;
5363 }
5364
5365 static int decode_delegreturn(struct xdr_stream *xdr)
5366 {
5367 return decode_op_hdr(xdr, OP_DELEGRETURN);
5368 }
5369
5370 static int decode_secinfo_gss(struct xdr_stream *xdr,
5371 struct nfs4_secinfo4 *flavor)
5372 {
5373 u32 oid_len;
5374 __be32 *p;
5375
5376 p = xdr_inline_decode(xdr, 4);
5377 if (unlikely(!p))
5378 goto out_overflow;
5379 oid_len = be32_to_cpup(p);
5380 if (oid_len > GSS_OID_MAX_LEN)
5381 goto out_err;
5382
5383 p = xdr_inline_decode(xdr, oid_len);
5384 if (unlikely(!p))
5385 goto out_overflow;
5386 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5387 flavor->flavor_info.oid.len = oid_len;
5388
5389 p = xdr_inline_decode(xdr, 8);
5390 if (unlikely(!p))
5391 goto out_overflow;
5392 flavor->flavor_info.qop = be32_to_cpup(p++);
5393 flavor->flavor_info.service = be32_to_cpup(p);
5394
5395 return 0;
5396
5397 out_overflow:
5398 print_overflow_msg(__func__, xdr);
5399 return -EIO;
5400 out_err:
5401 return -EINVAL;
5402 }
5403
5404 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5405 {
5406 struct nfs4_secinfo4 *sec_flavor;
5407 unsigned int i, num_flavors;
5408 int status;
5409 __be32 *p;
5410
5411 p = xdr_inline_decode(xdr, 4);
5412 if (unlikely(!p))
5413 goto out_overflow;
5414
5415 res->flavors->num_flavors = 0;
5416 num_flavors = be32_to_cpup(p);
5417
5418 for (i = 0; i < num_flavors; i++) {
5419 sec_flavor = &res->flavors->flavors[i];
5420 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5421 break;
5422
5423 p = xdr_inline_decode(xdr, 4);
5424 if (unlikely(!p))
5425 goto out_overflow;
5426 sec_flavor->flavor = be32_to_cpup(p);
5427
5428 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5429 status = decode_secinfo_gss(xdr, sec_flavor);
5430 if (status)
5431 goto out;
5432 }
5433 res->flavors->num_flavors++;
5434 }
5435
5436 status = 0;
5437 out:
5438 return status;
5439 out_overflow:
5440 print_overflow_msg(__func__, xdr);
5441 return -EIO;
5442 }
5443
5444 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445 {
5446 int status = decode_op_hdr(xdr, OP_SECINFO);
5447 if (status)
5448 return status;
5449 return decode_secinfo_common(xdr, res);
5450 }
5451
5452 #if defined(CONFIG_NFS_V4_1)
5453 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5454 {
5455 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5456 if (status)
5457 return status;
5458 return decode_secinfo_common(xdr, res);
5459 }
5460
5461 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5462 {
5463 __be32 *p;
5464 uint32_t bitmap_words;
5465 unsigned int i;
5466
5467 p = xdr_inline_decode(xdr, 4);
5468 bitmap_words = be32_to_cpup(p++);
5469 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5470 return -EIO;
5471 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5472 for (i = 0; i < bitmap_words; i++)
5473 op_map->u.words[i] = be32_to_cpup(p++);
5474
5475 return 0;
5476 }
5477
5478 static int decode_exchange_id(struct xdr_stream *xdr,
5479 struct nfs41_exchange_id_res *res)
5480 {
5481 __be32 *p;
5482 uint32_t dummy;
5483 char *dummy_str;
5484 int status;
5485 uint32_t impl_id_count;
5486
5487 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5488 if (status)
5489 return status;
5490
5491 p = xdr_inline_decode(xdr, 8);
5492 if (unlikely(!p))
5493 goto out_overflow;
5494 xdr_decode_hyper(p, &res->clientid);
5495 p = xdr_inline_decode(xdr, 12);
5496 if (unlikely(!p))
5497 goto out_overflow;
5498 res->seqid = be32_to_cpup(p++);
5499 res->flags = be32_to_cpup(p++);
5500
5501 res->state_protect.how = be32_to_cpup(p);
5502 switch (res->state_protect.how) {
5503 case SP4_NONE:
5504 break;
5505 case SP4_MACH_CRED:
5506 status = decode_op_map(xdr, &res->state_protect.enforce);
5507 if (status)
5508 return status;
5509 status = decode_op_map(xdr, &res->state_protect.allow);
5510 if (status)
5511 return status;
5512 break;
5513 default:
5514 WARN_ON_ONCE(1);
5515 return -EIO;
5516 }
5517
5518 /* server_owner4.so_minor_id */
5519 p = xdr_inline_decode(xdr, 8);
5520 if (unlikely(!p))
5521 goto out_overflow;
5522 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5523
5524 /* server_owner4.so_major_id */
5525 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5526 if (unlikely(status))
5527 return status;
5528 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5529 return -EIO;
5530 memcpy(res->server_owner->major_id, dummy_str, dummy);
5531 res->server_owner->major_id_sz = dummy;
5532
5533 /* server_scope4 */
5534 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5535 if (unlikely(status))
5536 return status;
5537 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5538 return -EIO;
5539 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5540 res->server_scope->server_scope_sz = dummy;
5541
5542 /* Implementation Id */
5543 p = xdr_inline_decode(xdr, 4);
5544 if (unlikely(!p))
5545 goto out_overflow;
5546 impl_id_count = be32_to_cpup(p++);
5547
5548 if (impl_id_count) {
5549 /* nii_domain */
5550 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5551 if (unlikely(status))
5552 return status;
5553 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5554 return -EIO;
5555 memcpy(res->impl_id->domain, dummy_str, dummy);
5556
5557 /* nii_name */
5558 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5559 if (unlikely(status))
5560 return status;
5561 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5562 return -EIO;
5563 memcpy(res->impl_id->name, dummy_str, dummy);
5564
5565 /* nii_date */
5566 p = xdr_inline_decode(xdr, 12);
5567 if (unlikely(!p))
5568 goto out_overflow;
5569 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5570 res->impl_id->date.nseconds = be32_to_cpup(p);
5571
5572 /* if there's more than one entry, ignore the rest */
5573 }
5574 return 0;
5575 out_overflow:
5576 print_overflow_msg(__func__, xdr);
5577 return -EIO;
5578 }
5579
5580 static int decode_chan_attrs(struct xdr_stream *xdr,
5581 struct nfs4_channel_attrs *attrs)
5582 {
5583 __be32 *p;
5584 u32 nr_attrs, val;
5585
5586 p = xdr_inline_decode(xdr, 28);
5587 if (unlikely(!p))
5588 goto out_overflow;
5589 val = be32_to_cpup(p++); /* headerpadsz */
5590 if (val)
5591 return -EINVAL; /* no support for header padding yet */
5592 attrs->max_rqst_sz = be32_to_cpup(p++);
5593 attrs->max_resp_sz = be32_to_cpup(p++);
5594 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5595 attrs->max_ops = be32_to_cpup(p++);
5596 attrs->max_reqs = be32_to_cpup(p++);
5597 nr_attrs = be32_to_cpup(p);
5598 if (unlikely(nr_attrs > 1)) {
5599 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5600 "count %u\n", __func__, nr_attrs);
5601 return -EINVAL;
5602 }
5603 if (nr_attrs == 1) {
5604 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5605 if (unlikely(!p))
5606 goto out_overflow;
5607 }
5608 return 0;
5609 out_overflow:
5610 print_overflow_msg(__func__, xdr);
5611 return -EIO;
5612 }
5613
5614 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5615 {
5616 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5617 }
5618
5619 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5620 struct nfs41_bind_conn_to_session_res *res)
5621 {
5622 __be32 *p;
5623 int status;
5624
5625 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5626 if (!status)
5627 status = decode_sessionid(xdr, &res->session->sess_id);
5628 if (unlikely(status))
5629 return status;
5630
5631 /* dir flags, rdma mode bool */
5632 p = xdr_inline_decode(xdr, 8);
5633 if (unlikely(!p))
5634 goto out_overflow;
5635
5636 res->dir = be32_to_cpup(p++);
5637 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5638 return -EIO;
5639 if (be32_to_cpup(p) == 0)
5640 res->use_conn_in_rdma_mode = false;
5641 else
5642 res->use_conn_in_rdma_mode = true;
5643
5644 return 0;
5645 out_overflow:
5646 print_overflow_msg(__func__, xdr);
5647 return -EIO;
5648 }
5649
5650 static int decode_create_session(struct xdr_stream *xdr,
5651 struct nfs41_create_session_res *res)
5652 {
5653 __be32 *p;
5654 int status;
5655 struct nfs_client *clp = res->client;
5656 struct nfs4_session *session = clp->cl_session;
5657
5658 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5659 if (!status)
5660 status = decode_sessionid(xdr, &session->sess_id);
5661 if (unlikely(status))
5662 return status;
5663
5664 /* seqid, flags */
5665 p = xdr_inline_decode(xdr, 8);
5666 if (unlikely(!p))
5667 goto out_overflow;
5668 clp->cl_seqid = be32_to_cpup(p++);
5669 session->flags = be32_to_cpup(p);
5670
5671 /* Channel attributes */
5672 status = decode_chan_attrs(xdr, &session->fc_attrs);
5673 if (!status)
5674 status = decode_chan_attrs(xdr, &session->bc_attrs);
5675 return status;
5676 out_overflow:
5677 print_overflow_msg(__func__, xdr);
5678 return -EIO;
5679 }
5680
5681 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5682 {
5683 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5684 }
5685
5686 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5687 {
5688 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5689 }
5690
5691 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5692 {
5693 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5694 }
5695 #endif /* CONFIG_NFS_V4_1 */
5696
5697 static int decode_sequence(struct xdr_stream *xdr,
5698 struct nfs4_sequence_res *res,
5699 struct rpc_rqst *rqstp)
5700 {
5701 #if defined(CONFIG_NFS_V4_1)
5702 struct nfs4_session *session;
5703 struct nfs4_sessionid id;
5704 u32 dummy;
5705 int status;
5706 __be32 *p;
5707
5708 if (res->sr_slot == NULL)
5709 return 0;
5710 if (!res->sr_slot->table->session)
5711 return 0;
5712
5713 status = decode_op_hdr(xdr, OP_SEQUENCE);
5714 if (!status)
5715 status = decode_sessionid(xdr, &id);
5716 if (unlikely(status))
5717 goto out_err;
5718
5719 /*
5720 * If the server returns different values for sessionID, slotID or
5721 * sequence number, the server is looney tunes.
5722 */
5723 status = -EREMOTEIO;
5724 session = res->sr_slot->table->session;
5725
5726 if (memcmp(id.data, session->sess_id.data,
5727 NFS4_MAX_SESSIONID_LEN)) {
5728 dprintk("%s Invalid session id\n", __func__);
5729 goto out_err;
5730 }
5731
5732 p = xdr_inline_decode(xdr, 20);
5733 if (unlikely(!p))
5734 goto out_overflow;
5735
5736 /* seqid */
5737 dummy = be32_to_cpup(p++);
5738 if (dummy != res->sr_slot->seq_nr) {
5739 dprintk("%s Invalid sequence number\n", __func__);
5740 goto out_err;
5741 }
5742 /* slot id */
5743 dummy = be32_to_cpup(p++);
5744 if (dummy != res->sr_slot->slot_nr) {
5745 dprintk("%s Invalid slot id\n", __func__);
5746 goto out_err;
5747 }
5748 /* highest slot id */
5749 res->sr_highest_slotid = be32_to_cpup(p++);
5750 /* target highest slot id */
5751 res->sr_target_highest_slotid = be32_to_cpup(p++);
5752 /* result flags */
5753 res->sr_status_flags = be32_to_cpup(p);
5754 status = 0;
5755 out_err:
5756 res->sr_status = status;
5757 return status;
5758 out_overflow:
5759 print_overflow_msg(__func__, xdr);
5760 status = -EIO;
5761 goto out_err;
5762 #else /* CONFIG_NFS_V4_1 */
5763 return 0;
5764 #endif /* CONFIG_NFS_V4_1 */
5765 }
5766
5767 #if defined(CONFIG_NFS_V4_1)
5768 /*
5769 * TODO: Need to handle case when EOF != true;
5770 */
5771 static int decode_getdevicelist(struct xdr_stream *xdr,
5772 struct pnfs_devicelist *res)
5773 {
5774 __be32 *p;
5775 int status, i;
5776 nfs4_verifier verftemp;
5777
5778 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5779 if (status)
5780 return status;
5781
5782 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5783 if (unlikely(!p))
5784 goto out_overflow;
5785
5786 /* TODO: Skip cookie for now */
5787 p += 2;
5788
5789 /* Read verifier */
5790 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5791
5792 res->num_devs = be32_to_cpup(p);
5793
5794 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5795
5796 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5797 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5798 __func__, res->num_devs);
5799 return -EIO;
5800 }
5801
5802 p = xdr_inline_decode(xdr,
5803 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5804 if (unlikely(!p))
5805 goto out_overflow;
5806 for (i = 0; i < res->num_devs; i++)
5807 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5808 NFS4_DEVICEID4_SIZE);
5809 res->eof = be32_to_cpup(p);
5810 return 0;
5811 out_overflow:
5812 print_overflow_msg(__func__, xdr);
5813 return -EIO;
5814 }
5815
5816 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5817 struct pnfs_device *pdev)
5818 {
5819 __be32 *p;
5820 uint32_t len, type;
5821 int status;
5822
5823 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5824 if (status) {
5825 if (status == -ETOOSMALL) {
5826 p = xdr_inline_decode(xdr, 4);
5827 if (unlikely(!p))
5828 goto out_overflow;
5829 pdev->mincount = be32_to_cpup(p);
5830 dprintk("%s: Min count too small. mincnt = %u\n",
5831 __func__, pdev->mincount);
5832 }
5833 return status;
5834 }
5835
5836 p = xdr_inline_decode(xdr, 8);
5837 if (unlikely(!p))
5838 goto out_overflow;
5839 type = be32_to_cpup(p++);
5840 if (type != pdev->layout_type) {
5841 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5842 __func__, pdev->layout_type, type);
5843 return -EINVAL;
5844 }
5845 /*
5846 * Get the length of the opaque device_addr4. xdr_read_pages places
5847 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5848 * and places the remaining xdr data in xdr_buf->tail
5849 */
5850 pdev->mincount = be32_to_cpup(p);
5851 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5852 goto out_overflow;
5853
5854 /* Parse notification bitmap, verifying that it is zero. */
5855 p = xdr_inline_decode(xdr, 4);
5856 if (unlikely(!p))
5857 goto out_overflow;
5858 len = be32_to_cpup(p);
5859 if (len) {
5860 uint32_t i;
5861
5862 p = xdr_inline_decode(xdr, 4 * len);
5863 if (unlikely(!p))
5864 goto out_overflow;
5865 for (i = 0; i < len; i++, p++) {
5866 if (be32_to_cpup(p)) {
5867 dprintk("%s: notifications not supported\n",
5868 __func__);
5869 return -EIO;
5870 }
5871 }
5872 }
5873 return 0;
5874 out_overflow:
5875 print_overflow_msg(__func__, xdr);
5876 return -EIO;
5877 }
5878
5879 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5880 struct nfs4_layoutget_res *res)
5881 {
5882 __be32 *p;
5883 int status;
5884 u32 layout_count;
5885 u32 recvd;
5886
5887 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5888 if (status)
5889 return status;
5890 p = xdr_inline_decode(xdr, 4);
5891 if (unlikely(!p))
5892 goto out_overflow;
5893 res->return_on_close = be32_to_cpup(p);
5894 decode_stateid(xdr, &res->stateid);
5895 p = xdr_inline_decode(xdr, 4);
5896 if (unlikely(!p))
5897 goto out_overflow;
5898 layout_count = be32_to_cpup(p);
5899 if (!layout_count) {
5900 dprintk("%s: server responded with empty layout array\n",
5901 __func__);
5902 return -EINVAL;
5903 }
5904
5905 p = xdr_inline_decode(xdr, 28);
5906 if (unlikely(!p))
5907 goto out_overflow;
5908 p = xdr_decode_hyper(p, &res->range.offset);
5909 p = xdr_decode_hyper(p, &res->range.length);
5910 res->range.iomode = be32_to_cpup(p++);
5911 res->type = be32_to_cpup(p++);
5912 res->layoutp->len = be32_to_cpup(p);
5913
5914 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5915 __func__,
5916 (unsigned long)res->range.offset,
5917 (unsigned long)res->range.length,
5918 res->range.iomode,
5919 res->type,
5920 res->layoutp->len);
5921
5922 recvd = xdr_read_pages(xdr, res->layoutp->len);
5923 if (res->layoutp->len > recvd) {
5924 dprintk("NFS: server cheating in layoutget reply: "
5925 "layout len %u > recvd %u\n",
5926 res->layoutp->len, recvd);
5927 return -EINVAL;
5928 }
5929
5930 if (layout_count > 1) {
5931 /* We only handle a length one array at the moment. Any
5932 * further entries are just ignored. Note that this means
5933 * the client may see a response that is less than the
5934 * minimum it requested.
5935 */
5936 dprintk("%s: server responded with %d layouts, dropping tail\n",
5937 __func__, layout_count);
5938 }
5939
5940 return 0;
5941 out_overflow:
5942 print_overflow_msg(__func__, xdr);
5943 return -EIO;
5944 }
5945
5946 static int decode_layoutreturn(struct xdr_stream *xdr,
5947 struct nfs4_layoutreturn_res *res)
5948 {
5949 __be32 *p;
5950 int status;
5951
5952 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5953 if (status)
5954 return status;
5955 p = xdr_inline_decode(xdr, 4);
5956 if (unlikely(!p))
5957 goto out_overflow;
5958 res->lrs_present = be32_to_cpup(p);
5959 if (res->lrs_present)
5960 status = decode_stateid(xdr, &res->stateid);
5961 return status;
5962 out_overflow:
5963 print_overflow_msg(__func__, xdr);
5964 return -EIO;
5965 }
5966
5967 static int decode_layoutcommit(struct xdr_stream *xdr,
5968 struct rpc_rqst *req,
5969 struct nfs4_layoutcommit_res *res)
5970 {
5971 __be32 *p;
5972 __u32 sizechanged;
5973 int status;
5974
5975 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5976 res->status = status;
5977 if (status)
5978 return status;
5979
5980 p = xdr_inline_decode(xdr, 4);
5981 if (unlikely(!p))
5982 goto out_overflow;
5983 sizechanged = be32_to_cpup(p);
5984
5985 if (sizechanged) {
5986 /* throw away new size */
5987 p = xdr_inline_decode(xdr, 8);
5988 if (unlikely(!p))
5989 goto out_overflow;
5990 }
5991 return 0;
5992 out_overflow:
5993 print_overflow_msg(__func__, xdr);
5994 return -EIO;
5995 }
5996
5997 static int decode_test_stateid(struct xdr_stream *xdr,
5998 struct nfs41_test_stateid_res *res)
5999 {
6000 __be32 *p;
6001 int status;
6002 int num_res;
6003
6004 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6005 if (status)
6006 return status;
6007
6008 p = xdr_inline_decode(xdr, 4);
6009 if (unlikely(!p))
6010 goto out_overflow;
6011 num_res = be32_to_cpup(p++);
6012 if (num_res != 1)
6013 goto out;
6014
6015 p = xdr_inline_decode(xdr, 4);
6016 if (unlikely(!p))
6017 goto out_overflow;
6018 res->status = be32_to_cpup(p++);
6019
6020 return status;
6021 out_overflow:
6022 print_overflow_msg(__func__, xdr);
6023 out:
6024 return -EIO;
6025 }
6026
6027 static int decode_free_stateid(struct xdr_stream *xdr,
6028 struct nfs41_free_stateid_res *res)
6029 {
6030 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6031 return res->status;
6032 }
6033 #endif /* CONFIG_NFS_V4_1 */
6034
6035 /*
6036 * END OF "GENERIC" DECODE ROUTINES.
6037 */
6038
6039 /*
6040 * Decode OPEN_DOWNGRADE response
6041 */
6042 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6043 struct xdr_stream *xdr,
6044 struct nfs_closeres *res)
6045 {
6046 struct compound_hdr hdr;
6047 int status;
6048
6049 status = decode_compound_hdr(xdr, &hdr);
6050 if (status)
6051 goto out;
6052 status = decode_sequence(xdr, &res->seq_res, rqstp);
6053 if (status)
6054 goto out;
6055 status = decode_putfh(xdr);
6056 if (status)
6057 goto out;
6058 status = decode_open_downgrade(xdr, res);
6059 if (status != 0)
6060 goto out;
6061 decode_getfattr(xdr, res->fattr, res->server);
6062 out:
6063 return status;
6064 }
6065
6066 /*
6067 * Decode ACCESS response
6068 */
6069 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6070 struct nfs4_accessres *res)
6071 {
6072 struct compound_hdr hdr;
6073 int status;
6074
6075 status = decode_compound_hdr(xdr, &hdr);
6076 if (status)
6077 goto out;
6078 status = decode_sequence(xdr, &res->seq_res, rqstp);
6079 if (status)
6080 goto out;
6081 status = decode_putfh(xdr);
6082 if (status != 0)
6083 goto out;
6084 status = decode_access(xdr, &res->supported, &res->access);
6085 if (status != 0)
6086 goto out;
6087 decode_getfattr(xdr, res->fattr, res->server);
6088 out:
6089 return status;
6090 }
6091
6092 /*
6093 * Decode LOOKUP response
6094 */
6095 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6096 struct nfs4_lookup_res *res)
6097 {
6098 struct compound_hdr hdr;
6099 int status;
6100
6101 status = decode_compound_hdr(xdr, &hdr);
6102 if (status)
6103 goto out;
6104 status = decode_sequence(xdr, &res->seq_res, rqstp);
6105 if (status)
6106 goto out;
6107 status = decode_putfh(xdr);
6108 if (status)
6109 goto out;
6110 status = decode_lookup(xdr);
6111 if (status)
6112 goto out;
6113 status = decode_getfh(xdr, res->fh);
6114 if (status)
6115 goto out;
6116 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6117 out:
6118 return status;
6119 }
6120
6121 /*
6122 * Decode LOOKUP_ROOT response
6123 */
6124 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6125 struct xdr_stream *xdr,
6126 struct nfs4_lookup_res *res)
6127 {
6128 struct compound_hdr hdr;
6129 int status;
6130
6131 status = decode_compound_hdr(xdr, &hdr);
6132 if (status)
6133 goto out;
6134 status = decode_sequence(xdr, &res->seq_res, rqstp);
6135 if (status)
6136 goto out;
6137 status = decode_putrootfh(xdr);
6138 if (status)
6139 goto out;
6140 status = decode_getfh(xdr, res->fh);
6141 if (status == 0)
6142 status = decode_getfattr_label(xdr, res->fattr,
6143 res->label, res->server);
6144 out:
6145 return status;
6146 }
6147
6148 /*
6149 * Decode REMOVE response
6150 */
6151 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6152 struct nfs_removeres *res)
6153 {
6154 struct compound_hdr hdr;
6155 int status;
6156
6157 status = decode_compound_hdr(xdr, &hdr);
6158 if (status)
6159 goto out;
6160 status = decode_sequence(xdr, &res->seq_res, rqstp);
6161 if (status)
6162 goto out;
6163 status = decode_putfh(xdr);
6164 if (status)
6165 goto out;
6166 status = decode_remove(xdr, &res->cinfo);
6167 out:
6168 return status;
6169 }
6170
6171 /*
6172 * Decode RENAME response
6173 */
6174 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6175 struct nfs_renameres *res)
6176 {
6177 struct compound_hdr hdr;
6178 int status;
6179
6180 status = decode_compound_hdr(xdr, &hdr);
6181 if (status)
6182 goto out;
6183 status = decode_sequence(xdr, &res->seq_res, rqstp);
6184 if (status)
6185 goto out;
6186 status = decode_putfh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_savefh(xdr);
6190 if (status)
6191 goto out;
6192 status = decode_putfh(xdr);
6193 if (status)
6194 goto out;
6195 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6196 out:
6197 return status;
6198 }
6199
6200 /*
6201 * Decode LINK response
6202 */
6203 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6204 struct nfs4_link_res *res)
6205 {
6206 struct compound_hdr hdr;
6207 int status;
6208
6209 status = decode_compound_hdr(xdr, &hdr);
6210 if (status)
6211 goto out;
6212 status = decode_sequence(xdr, &res->seq_res, rqstp);
6213 if (status)
6214 goto out;
6215 status = decode_putfh(xdr);
6216 if (status)
6217 goto out;
6218 status = decode_savefh(xdr);
6219 if (status)
6220 goto out;
6221 status = decode_putfh(xdr);
6222 if (status)
6223 goto out;
6224 status = decode_link(xdr, &res->cinfo);
6225 if (status)
6226 goto out;
6227 /*
6228 * Note order: OP_LINK leaves the directory as the current
6229 * filehandle.
6230 */
6231 status = decode_restorefh(xdr);
6232 if (status)
6233 goto out;
6234 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6235 out:
6236 return status;
6237 }
6238
6239 /*
6240 * Decode CREATE response
6241 */
6242 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6243 struct nfs4_create_res *res)
6244 {
6245 struct compound_hdr hdr;
6246 int status;
6247
6248 status = decode_compound_hdr(xdr, &hdr);
6249 if (status)
6250 goto out;
6251 status = decode_sequence(xdr, &res->seq_res, rqstp);
6252 if (status)
6253 goto out;
6254 status = decode_putfh(xdr);
6255 if (status)
6256 goto out;
6257 status = decode_create(xdr, &res->dir_cinfo);
6258 if (status)
6259 goto out;
6260 status = decode_getfh(xdr, res->fh);
6261 if (status)
6262 goto out;
6263 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6264 out:
6265 return status;
6266 }
6267
6268 /*
6269 * Decode SYMLINK response
6270 */
6271 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6272 struct nfs4_create_res *res)
6273 {
6274 return nfs4_xdr_dec_create(rqstp, xdr, res);
6275 }
6276
6277 /*
6278 * Decode GETATTR response
6279 */
6280 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6281 struct nfs4_getattr_res *res)
6282 {
6283 struct compound_hdr hdr;
6284 int status;
6285
6286 status = decode_compound_hdr(xdr, &hdr);
6287 if (status)
6288 goto out;
6289 status = decode_sequence(xdr, &res->seq_res, rqstp);
6290 if (status)
6291 goto out;
6292 status = decode_putfh(xdr);
6293 if (status)
6294 goto out;
6295 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6296 out:
6297 return status;
6298 }
6299
6300 /*
6301 * Encode an SETACL request
6302 */
6303 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6304 struct nfs_setaclargs *args)
6305 {
6306 struct compound_hdr hdr = {
6307 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6308 };
6309
6310 encode_compound_hdr(xdr, req, &hdr);
6311 encode_sequence(xdr, &args->seq_args, &hdr);
6312 encode_putfh(xdr, args->fh, &hdr);
6313 encode_setacl(xdr, args, &hdr);
6314 encode_nops(&hdr);
6315 }
6316
6317 /*
6318 * Decode SETACL response
6319 */
6320 static int
6321 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6322 struct nfs_setaclres *res)
6323 {
6324 struct compound_hdr hdr;
6325 int status;
6326
6327 status = decode_compound_hdr(xdr, &hdr);
6328 if (status)
6329 goto out;
6330 status = decode_sequence(xdr, &res->seq_res, rqstp);
6331 if (status)
6332 goto out;
6333 status = decode_putfh(xdr);
6334 if (status)
6335 goto out;
6336 status = decode_setattr(xdr);
6337 out:
6338 return status;
6339 }
6340
6341 /*
6342 * Decode GETACL response
6343 */
6344 static int
6345 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346 struct nfs_getaclres *res)
6347 {
6348 struct compound_hdr hdr;
6349 int status;
6350
6351 if (res->acl_scratch != NULL) {
6352 void *p = page_address(res->acl_scratch);
6353 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6354 }
6355 status = decode_compound_hdr(xdr, &hdr);
6356 if (status)
6357 goto out;
6358 status = decode_sequence(xdr, &res->seq_res, rqstp);
6359 if (status)
6360 goto out;
6361 status = decode_putfh(xdr);
6362 if (status)
6363 goto out;
6364 status = decode_getacl(xdr, rqstp, res);
6365
6366 out:
6367 return status;
6368 }
6369
6370 /*
6371 * Decode CLOSE response
6372 */
6373 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374 struct nfs_closeres *res)
6375 {
6376 struct compound_hdr hdr;
6377 int status;
6378
6379 status = decode_compound_hdr(xdr, &hdr);
6380 if (status)
6381 goto out;
6382 status = decode_sequence(xdr, &res->seq_res, rqstp);
6383 if (status)
6384 goto out;
6385 status = decode_putfh(xdr);
6386 if (status)
6387 goto out;
6388 status = decode_close(xdr, res);
6389 if (status != 0)
6390 goto out;
6391 /*
6392 * Note: Server may do delete on close for this file
6393 * in which case the getattr call will fail with
6394 * an ESTALE error. Shouldn't be a problem,
6395 * though, since fattr->valid will remain unset.
6396 */
6397 decode_getfattr(xdr, res->fattr, res->server);
6398 out:
6399 return status;
6400 }
6401
6402 /*
6403 * Decode OPEN response
6404 */
6405 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406 struct nfs_openres *res)
6407 {
6408 struct compound_hdr hdr;
6409 int status;
6410
6411 status = decode_compound_hdr(xdr, &hdr);
6412 if (status)
6413 goto out;
6414 status = decode_sequence(xdr, &res->seq_res, rqstp);
6415 if (status)
6416 goto out;
6417 status = decode_putfh(xdr);
6418 if (status)
6419 goto out;
6420 status = decode_open(xdr, res);
6421 if (status)
6422 goto out;
6423 status = decode_getfh(xdr, &res->fh);
6424 if (status)
6425 goto out;
6426 if (res->access_request)
6427 decode_access(xdr, &res->access_supported, &res->access_result);
6428 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6429 out:
6430 return status;
6431 }
6432
6433 /*
6434 * Decode OPEN_CONFIRM response
6435 */
6436 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6437 struct xdr_stream *xdr,
6438 struct nfs_open_confirmres *res)
6439 {
6440 struct compound_hdr hdr;
6441 int status;
6442
6443 status = decode_compound_hdr(xdr, &hdr);
6444 if (status)
6445 goto out;
6446 status = decode_putfh(xdr);
6447 if (status)
6448 goto out;
6449 status = decode_open_confirm(xdr, res);
6450 out:
6451 return status;
6452 }
6453
6454 /*
6455 * Decode OPEN response
6456 */
6457 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6458 struct xdr_stream *xdr,
6459 struct nfs_openres *res)
6460 {
6461 struct compound_hdr hdr;
6462 int status;
6463
6464 status = decode_compound_hdr(xdr, &hdr);
6465 if (status)
6466 goto out;
6467 status = decode_sequence(xdr, &res->seq_res, rqstp);
6468 if (status)
6469 goto out;
6470 status = decode_putfh(xdr);
6471 if (status)
6472 goto out;
6473 status = decode_open(xdr, res);
6474 if (status)
6475 goto out;
6476 if (res->access_request)
6477 decode_access(xdr, &res->access_supported, &res->access_result);
6478 decode_getfattr(xdr, res->f_attr, res->server);
6479 out:
6480 return status;
6481 }
6482
6483 /*
6484 * Decode SETATTR response
6485 */
6486 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6487 struct xdr_stream *xdr,
6488 struct nfs_setattrres *res)
6489 {
6490 struct compound_hdr hdr;
6491 int status;
6492
6493 status = decode_compound_hdr(xdr, &hdr);
6494 if (status)
6495 goto out;
6496 status = decode_sequence(xdr, &res->seq_res, rqstp);
6497 if (status)
6498 goto out;
6499 status = decode_putfh(xdr);
6500 if (status)
6501 goto out;
6502 status = decode_setattr(xdr);
6503 if (status)
6504 goto out;
6505 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6506 out:
6507 return status;
6508 }
6509
6510 /*
6511 * Decode LOCK response
6512 */
6513 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6514 struct nfs_lock_res *res)
6515 {
6516 struct compound_hdr hdr;
6517 int status;
6518
6519 status = decode_compound_hdr(xdr, &hdr);
6520 if (status)
6521 goto out;
6522 status = decode_sequence(xdr, &res->seq_res, rqstp);
6523 if (status)
6524 goto out;
6525 status = decode_putfh(xdr);
6526 if (status)
6527 goto out;
6528 status = decode_lock(xdr, res);
6529 out:
6530 return status;
6531 }
6532
6533 /*
6534 * Decode LOCKT response
6535 */
6536 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6537 struct nfs_lockt_res *res)
6538 {
6539 struct compound_hdr hdr;
6540 int status;
6541
6542 status = decode_compound_hdr(xdr, &hdr);
6543 if (status)
6544 goto out;
6545 status = decode_sequence(xdr, &res->seq_res, rqstp);
6546 if (status)
6547 goto out;
6548 status = decode_putfh(xdr);
6549 if (status)
6550 goto out;
6551 status = decode_lockt(xdr, res);
6552 out:
6553 return status;
6554 }
6555
6556 /*
6557 * Decode LOCKU response
6558 */
6559 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6560 struct nfs_locku_res *res)
6561 {
6562 struct compound_hdr hdr;
6563 int status;
6564
6565 status = decode_compound_hdr(xdr, &hdr);
6566 if (status)
6567 goto out;
6568 status = decode_sequence(xdr, &res->seq_res, rqstp);
6569 if (status)
6570 goto out;
6571 status = decode_putfh(xdr);
6572 if (status)
6573 goto out;
6574 status = decode_locku(xdr, res);
6575 out:
6576 return status;
6577 }
6578
6579 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6580 struct xdr_stream *xdr, void *dummy)
6581 {
6582 struct compound_hdr hdr;
6583 int status;
6584
6585 status = decode_compound_hdr(xdr, &hdr);
6586 if (!status)
6587 status = decode_release_lockowner(xdr);
6588 return status;
6589 }
6590
6591 /*
6592 * Decode READLINK response
6593 */
6594 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6595 struct xdr_stream *xdr,
6596 struct nfs4_readlink_res *res)
6597 {
6598 struct compound_hdr hdr;
6599 int status;
6600
6601 status = decode_compound_hdr(xdr, &hdr);
6602 if (status)
6603 goto out;
6604 status = decode_sequence(xdr, &res->seq_res, rqstp);
6605 if (status)
6606 goto out;
6607 status = decode_putfh(xdr);
6608 if (status)
6609 goto out;
6610 status = decode_readlink(xdr, rqstp);
6611 out:
6612 return status;
6613 }
6614
6615 /*
6616 * Decode READDIR response
6617 */
6618 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6619 struct nfs4_readdir_res *res)
6620 {
6621 struct compound_hdr hdr;
6622 int status;
6623
6624 status = decode_compound_hdr(xdr, &hdr);
6625 if (status)
6626 goto out;
6627 status = decode_sequence(xdr, &res->seq_res, rqstp);
6628 if (status)
6629 goto out;
6630 status = decode_putfh(xdr);
6631 if (status)
6632 goto out;
6633 status = decode_readdir(xdr, rqstp, res);
6634 out:
6635 return status;
6636 }
6637
6638 /*
6639 * Decode Read response
6640 */
6641 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6642 struct nfs_pgio_res *res)
6643 {
6644 struct compound_hdr hdr;
6645 int status;
6646
6647 status = decode_compound_hdr(xdr, &hdr);
6648 if (status)
6649 goto out;
6650 status = decode_sequence(xdr, &res->seq_res, rqstp);
6651 if (status)
6652 goto out;
6653 status = decode_putfh(xdr);
6654 if (status)
6655 goto out;
6656 status = decode_read(xdr, rqstp, res);
6657 if (!status)
6658 status = res->count;
6659 out:
6660 return status;
6661 }
6662
6663 /*
6664 * Decode WRITE response
6665 */
6666 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6667 struct nfs_pgio_res *res)
6668 {
6669 struct compound_hdr hdr;
6670 int status;
6671
6672 status = decode_compound_hdr(xdr, &hdr);
6673 if (status)
6674 goto out;
6675 status = decode_sequence(xdr, &res->seq_res, rqstp);
6676 if (status)
6677 goto out;
6678 status = decode_putfh(xdr);
6679 if (status)
6680 goto out;
6681 status = decode_write(xdr, res);
6682 if (status)
6683 goto out;
6684 if (res->fattr)
6685 decode_getfattr(xdr, res->fattr, res->server);
6686 if (!status)
6687 status = res->count;
6688 out:
6689 return status;
6690 }
6691
6692 /*
6693 * Decode COMMIT response
6694 */
6695 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696 struct nfs_commitres *res)
6697 {
6698 struct compound_hdr hdr;
6699 int status;
6700
6701 status = decode_compound_hdr(xdr, &hdr);
6702 if (status)
6703 goto out;
6704 status = decode_sequence(xdr, &res->seq_res, rqstp);
6705 if (status)
6706 goto out;
6707 status = decode_putfh(xdr);
6708 if (status)
6709 goto out;
6710 status = decode_commit(xdr, res);
6711 out:
6712 return status;
6713 }
6714
6715 /*
6716 * Decode FSINFO response
6717 */
6718 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6719 struct nfs4_fsinfo_res *res)
6720 {
6721 struct compound_hdr hdr;
6722 int status;
6723
6724 status = decode_compound_hdr(xdr, &hdr);
6725 if (!status)
6726 status = decode_sequence(xdr, &res->seq_res, req);
6727 if (!status)
6728 status = decode_putfh(xdr);
6729 if (!status)
6730 status = decode_fsinfo(xdr, res->fsinfo);
6731 return status;
6732 }
6733
6734 /*
6735 * Decode PATHCONF response
6736 */
6737 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6738 struct nfs4_pathconf_res *res)
6739 {
6740 struct compound_hdr hdr;
6741 int status;
6742
6743 status = decode_compound_hdr(xdr, &hdr);
6744 if (!status)
6745 status = decode_sequence(xdr, &res->seq_res, req);
6746 if (!status)
6747 status = decode_putfh(xdr);
6748 if (!status)
6749 status = decode_pathconf(xdr, res->pathconf);
6750 return status;
6751 }
6752
6753 /*
6754 * Decode STATFS response
6755 */
6756 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6757 struct nfs4_statfs_res *res)
6758 {
6759 struct compound_hdr hdr;
6760 int status;
6761
6762 status = decode_compound_hdr(xdr, &hdr);
6763 if (!status)
6764 status = decode_sequence(xdr, &res->seq_res, req);
6765 if (!status)
6766 status = decode_putfh(xdr);
6767 if (!status)
6768 status = decode_statfs(xdr, res->fsstat);
6769 return status;
6770 }
6771
6772 /*
6773 * Decode GETATTR_BITMAP response
6774 */
6775 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6776 struct xdr_stream *xdr,
6777 struct nfs4_server_caps_res *res)
6778 {
6779 struct compound_hdr hdr;
6780 int status;
6781
6782 status = decode_compound_hdr(xdr, &hdr);
6783 if (status)
6784 goto out;
6785 status = decode_sequence(xdr, &res->seq_res, req);
6786 if (status)
6787 goto out;
6788 status = decode_putfh(xdr);
6789 if (status)
6790 goto out;
6791 status = decode_server_caps(xdr, res);
6792 out:
6793 return status;
6794 }
6795
6796 /*
6797 * Decode RENEW response
6798 */
6799 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6800 void *__unused)
6801 {
6802 struct compound_hdr hdr;
6803 int status;
6804
6805 status = decode_compound_hdr(xdr, &hdr);
6806 if (!status)
6807 status = decode_renew(xdr);
6808 return status;
6809 }
6810
6811 /*
6812 * Decode SETCLIENTID response
6813 */
6814 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6815 struct xdr_stream *xdr,
6816 struct nfs4_setclientid_res *res)
6817 {
6818 struct compound_hdr hdr;
6819 int status;
6820
6821 status = decode_compound_hdr(xdr, &hdr);
6822 if (!status)
6823 status = decode_setclientid(xdr, res);
6824 return status;
6825 }
6826
6827 /*
6828 * Decode SETCLIENTID_CONFIRM response
6829 */
6830 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6831 struct xdr_stream *xdr)
6832 {
6833 struct compound_hdr hdr;
6834 int status;
6835
6836 status = decode_compound_hdr(xdr, &hdr);
6837 if (!status)
6838 status = decode_setclientid_confirm(xdr);
6839 return status;
6840 }
6841
6842 /*
6843 * Decode DELEGRETURN response
6844 */
6845 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6846 struct xdr_stream *xdr,
6847 struct nfs4_delegreturnres *res)
6848 {
6849 struct compound_hdr hdr;
6850 int status;
6851
6852 status = decode_compound_hdr(xdr, &hdr);
6853 if (status)
6854 goto out;
6855 status = decode_sequence(xdr, &res->seq_res, rqstp);
6856 if (status)
6857 goto out;
6858 status = decode_putfh(xdr);
6859 if (status != 0)
6860 goto out;
6861 status = decode_getfattr(xdr, res->fattr, res->server);
6862 if (status != 0)
6863 goto out;
6864 status = decode_delegreturn(xdr);
6865 out:
6866 return status;
6867 }
6868
6869 /*
6870 * Decode FS_LOCATIONS response
6871 */
6872 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6873 struct xdr_stream *xdr,
6874 struct nfs4_fs_locations_res *res)
6875 {
6876 struct compound_hdr hdr;
6877 int status;
6878
6879 status = decode_compound_hdr(xdr, &hdr);
6880 if (status)
6881 goto out;
6882 status = decode_sequence(xdr, &res->seq_res, req);
6883 if (status)
6884 goto out;
6885 status = decode_putfh(xdr);
6886 if (status)
6887 goto out;
6888 if (res->migration) {
6889 xdr_enter_page(xdr, PAGE_SIZE);
6890 status = decode_getfattr_generic(xdr,
6891 &res->fs_locations->fattr,
6892 NULL, res->fs_locations,
6893 NULL, res->fs_locations->server);
6894 if (status)
6895 goto out;
6896 if (res->renew)
6897 status = decode_renew(xdr);
6898 } else {
6899 status = decode_lookup(xdr);
6900 if (status)
6901 goto out;
6902 xdr_enter_page(xdr, PAGE_SIZE);
6903 status = decode_getfattr_generic(xdr,
6904 &res->fs_locations->fattr,
6905 NULL, res->fs_locations,
6906 NULL, res->fs_locations->server);
6907 }
6908 out:
6909 return status;
6910 }
6911
6912 /*
6913 * Decode SECINFO response
6914 */
6915 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6916 struct xdr_stream *xdr,
6917 struct nfs4_secinfo_res *res)
6918 {
6919 struct compound_hdr hdr;
6920 int status;
6921
6922 status = decode_compound_hdr(xdr, &hdr);
6923 if (status)
6924 goto out;
6925 status = decode_sequence(xdr, &res->seq_res, rqstp);
6926 if (status)
6927 goto out;
6928 status = decode_putfh(xdr);
6929 if (status)
6930 goto out;
6931 status = decode_secinfo(xdr, res);
6932 out:
6933 return status;
6934 }
6935
6936 /*
6937 * Decode FSID_PRESENT response
6938 */
6939 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6940 struct xdr_stream *xdr,
6941 struct nfs4_fsid_present_res *res)
6942 {
6943 struct compound_hdr hdr;
6944 int status;
6945
6946 status = decode_compound_hdr(xdr, &hdr);
6947 if (status)
6948 goto out;
6949 status = decode_sequence(xdr, &res->seq_res, rqstp);
6950 if (status)
6951 goto out;
6952 status = decode_putfh(xdr);
6953 if (status)
6954 goto out;
6955 status = decode_getfh(xdr, res->fh);
6956 if (status)
6957 goto out;
6958 if (res->renew)
6959 status = decode_renew(xdr);
6960 out:
6961 return status;
6962 }
6963
6964 #if defined(CONFIG_NFS_V4_1)
6965 /*
6966 * Decode BIND_CONN_TO_SESSION response
6967 */
6968 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6969 struct xdr_stream *xdr,
6970 void *res)
6971 {
6972 struct compound_hdr hdr;
6973 int status;
6974
6975 status = decode_compound_hdr(xdr, &hdr);
6976 if (!status)
6977 status = decode_bind_conn_to_session(xdr, res);
6978 return status;
6979 }
6980
6981 /*
6982 * Decode EXCHANGE_ID response
6983 */
6984 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6985 struct xdr_stream *xdr,
6986 void *res)
6987 {
6988 struct compound_hdr hdr;
6989 int status;
6990
6991 status = decode_compound_hdr(xdr, &hdr);
6992 if (!status)
6993 status = decode_exchange_id(xdr, res);
6994 return status;
6995 }
6996
6997 /*
6998 * Decode CREATE_SESSION response
6999 */
7000 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7001 struct xdr_stream *xdr,
7002 struct nfs41_create_session_res *res)
7003 {
7004 struct compound_hdr hdr;
7005 int status;
7006
7007 status = decode_compound_hdr(xdr, &hdr);
7008 if (!status)
7009 status = decode_create_session(xdr, res);
7010 return status;
7011 }
7012
7013 /*
7014 * Decode DESTROY_SESSION response
7015 */
7016 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7017 struct xdr_stream *xdr,
7018 void *res)
7019 {
7020 struct compound_hdr hdr;
7021 int status;
7022
7023 status = decode_compound_hdr(xdr, &hdr);
7024 if (!status)
7025 status = decode_destroy_session(xdr, res);
7026 return status;
7027 }
7028
7029 /*
7030 * Decode DESTROY_CLIENTID response
7031 */
7032 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7033 struct xdr_stream *xdr,
7034 void *res)
7035 {
7036 struct compound_hdr hdr;
7037 int status;
7038
7039 status = decode_compound_hdr(xdr, &hdr);
7040 if (!status)
7041 status = decode_destroy_clientid(xdr, res);
7042 return status;
7043 }
7044
7045 /*
7046 * Decode SEQUENCE response
7047 */
7048 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7049 struct xdr_stream *xdr,
7050 struct nfs4_sequence_res *res)
7051 {
7052 struct compound_hdr hdr;
7053 int status;
7054
7055 status = decode_compound_hdr(xdr, &hdr);
7056 if (!status)
7057 status = decode_sequence(xdr, res, rqstp);
7058 return status;
7059 }
7060
7061 /*
7062 * Decode GET_LEASE_TIME response
7063 */
7064 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7065 struct xdr_stream *xdr,
7066 struct nfs4_get_lease_time_res *res)
7067 {
7068 struct compound_hdr hdr;
7069 int status;
7070
7071 status = decode_compound_hdr(xdr, &hdr);
7072 if (!status)
7073 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7074 if (!status)
7075 status = decode_putrootfh(xdr);
7076 if (!status)
7077 status = decode_fsinfo(xdr, res->lr_fsinfo);
7078 return status;
7079 }
7080
7081 /*
7082 * Decode RECLAIM_COMPLETE response
7083 */
7084 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7085 struct xdr_stream *xdr,
7086 struct nfs41_reclaim_complete_res *res)
7087 {
7088 struct compound_hdr hdr;
7089 int status;
7090
7091 status = decode_compound_hdr(xdr, &hdr);
7092 if (!status)
7093 status = decode_sequence(xdr, &res->seq_res, rqstp);
7094 if (!status)
7095 status = decode_reclaim_complete(xdr, NULL);
7096 return status;
7097 }
7098
7099 /*
7100 * Decode GETDEVICELIST response
7101 */
7102 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7103 struct xdr_stream *xdr,
7104 struct nfs4_getdevicelist_res *res)
7105 {
7106 struct compound_hdr hdr;
7107 int status;
7108
7109 dprintk("encoding getdevicelist!\n");
7110
7111 status = decode_compound_hdr(xdr, &hdr);
7112 if (status != 0)
7113 goto out;
7114 status = decode_sequence(xdr, &res->seq_res, rqstp);
7115 if (status != 0)
7116 goto out;
7117 status = decode_putfh(xdr);
7118 if (status != 0)
7119 goto out;
7120 status = decode_getdevicelist(xdr, res->devlist);
7121 out:
7122 return status;
7123 }
7124
7125 /*
7126 * Decode GETDEVINFO response
7127 */
7128 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7129 struct xdr_stream *xdr,
7130 struct nfs4_getdeviceinfo_res *res)
7131 {
7132 struct compound_hdr hdr;
7133 int status;
7134
7135 status = decode_compound_hdr(xdr, &hdr);
7136 if (status != 0)
7137 goto out;
7138 status = decode_sequence(xdr, &res->seq_res, rqstp);
7139 if (status != 0)
7140 goto out;
7141 status = decode_getdeviceinfo(xdr, res->pdev);
7142 out:
7143 return status;
7144 }
7145
7146 /*
7147 * Decode LAYOUTGET response
7148 */
7149 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7150 struct xdr_stream *xdr,
7151 struct nfs4_layoutget_res *res)
7152 {
7153 struct compound_hdr hdr;
7154 int status;
7155
7156 status = decode_compound_hdr(xdr, &hdr);
7157 if (status)
7158 goto out;
7159 status = decode_sequence(xdr, &res->seq_res, rqstp);
7160 if (status)
7161 goto out;
7162 status = decode_putfh(xdr);
7163 if (status)
7164 goto out;
7165 status = decode_layoutget(xdr, rqstp, res);
7166 out:
7167 return status;
7168 }
7169
7170 /*
7171 * Decode LAYOUTRETURN response
7172 */
7173 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7174 struct xdr_stream *xdr,
7175 struct nfs4_layoutreturn_res *res)
7176 {
7177 struct compound_hdr hdr;
7178 int status;
7179
7180 status = decode_compound_hdr(xdr, &hdr);
7181 if (status)
7182 goto out;
7183 status = decode_sequence(xdr, &res->seq_res, rqstp);
7184 if (status)
7185 goto out;
7186 status = decode_putfh(xdr);
7187 if (status)
7188 goto out;
7189 status = decode_layoutreturn(xdr, res);
7190 out:
7191 return status;
7192 }
7193
7194 /*
7195 * Decode LAYOUTCOMMIT response
7196 */
7197 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7198 struct xdr_stream *xdr,
7199 struct nfs4_layoutcommit_res *res)
7200 {
7201 struct compound_hdr hdr;
7202 int status;
7203
7204 status = decode_compound_hdr(xdr, &hdr);
7205 if (status)
7206 goto out;
7207 status = decode_sequence(xdr, &res->seq_res, rqstp);
7208 if (status)
7209 goto out;
7210 status = decode_putfh(xdr);
7211 if (status)
7212 goto out;
7213 status = decode_layoutcommit(xdr, rqstp, res);
7214 if (status)
7215 goto out;
7216 decode_getfattr(xdr, res->fattr, res->server);
7217 out:
7218 return status;
7219 }
7220
7221 /*
7222 * Decode SECINFO_NO_NAME response
7223 */
7224 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7225 struct xdr_stream *xdr,
7226 struct nfs4_secinfo_res *res)
7227 {
7228 struct compound_hdr hdr;
7229 int status;
7230
7231 status = decode_compound_hdr(xdr, &hdr);
7232 if (status)
7233 goto out;
7234 status = decode_sequence(xdr, &res->seq_res, rqstp);
7235 if (status)
7236 goto out;
7237 status = decode_putrootfh(xdr);
7238 if (status)
7239 goto out;
7240 status = decode_secinfo_no_name(xdr, res);
7241 out:
7242 return status;
7243 }
7244
7245 /*
7246 * Decode TEST_STATEID response
7247 */
7248 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7249 struct xdr_stream *xdr,
7250 struct nfs41_test_stateid_res *res)
7251 {
7252 struct compound_hdr hdr;
7253 int status;
7254
7255 status = decode_compound_hdr(xdr, &hdr);
7256 if (status)
7257 goto out;
7258 status = decode_sequence(xdr, &res->seq_res, rqstp);
7259 if (status)
7260 goto out;
7261 status = decode_test_stateid(xdr, res);
7262 out:
7263 return status;
7264 }
7265
7266 /*
7267 * Decode FREE_STATEID response
7268 */
7269 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7270 struct xdr_stream *xdr,
7271 struct nfs41_free_stateid_res *res)
7272 {
7273 struct compound_hdr hdr;
7274 int status;
7275
7276 status = decode_compound_hdr(xdr, &hdr);
7277 if (status)
7278 goto out;
7279 status = decode_sequence(xdr, &res->seq_res, rqstp);
7280 if (status)
7281 goto out;
7282 status = decode_free_stateid(xdr, res);
7283 out:
7284 return status;
7285 }
7286 #endif /* CONFIG_NFS_V4_1 */
7287
7288 /**
7289 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7290 * the local page cache.
7291 * @xdr: XDR stream where entry resides
7292 * @entry: buffer to fill in with entry data
7293 * @plus: boolean indicating whether this should be a readdirplus entry
7294 *
7295 * Returns zero if successful, otherwise a negative errno value is
7296 * returned.
7297 *
7298 * This function is not invoked during READDIR reply decoding, but
7299 * rather whenever an application invokes the getdents(2) system call
7300 * on a directory already in our cache.
7301 */
7302 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7303 int plus)
7304 {
7305 unsigned int savep;
7306 uint32_t bitmap[3] = {0};
7307 uint32_t len;
7308 __be32 *p = xdr_inline_decode(xdr, 4);
7309 if (unlikely(!p))
7310 goto out_overflow;
7311 if (*p == xdr_zero) {
7312 p = xdr_inline_decode(xdr, 4);
7313 if (unlikely(!p))
7314 goto out_overflow;
7315 if (*p == xdr_zero)
7316 return -EAGAIN;
7317 entry->eof = 1;
7318 return -EBADCOOKIE;
7319 }
7320
7321 p = xdr_inline_decode(xdr, 12);
7322 if (unlikely(!p))
7323 goto out_overflow;
7324 entry->prev_cookie = entry->cookie;
7325 p = xdr_decode_hyper(p, &entry->cookie);
7326 entry->len = be32_to_cpup(p);
7327
7328 p = xdr_inline_decode(xdr, entry->len);
7329 if (unlikely(!p))
7330 goto out_overflow;
7331 entry->name = (const char *) p;
7332
7333 /*
7334 * In case the server doesn't return an inode number,
7335 * we fake one here. (We don't use inode number 0,
7336 * since glibc seems to choke on it...)
7337 */
7338 entry->ino = 1;
7339 entry->fattr->valid = 0;
7340
7341 if (decode_attr_bitmap(xdr, bitmap) < 0)
7342 goto out_overflow;
7343
7344 if (decode_attr_length(xdr, &len, &savep) < 0)
7345 goto out_overflow;
7346
7347 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7348 NULL, entry->label, entry->server) < 0)
7349 goto out_overflow;
7350 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7351 entry->ino = entry->fattr->mounted_on_fileid;
7352 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7353 entry->ino = entry->fattr->fileid;
7354
7355 entry->d_type = DT_UNKNOWN;
7356 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7357 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7358
7359 return 0;
7360
7361 out_overflow:
7362 print_overflow_msg(__func__, xdr);
7363 return -EAGAIN;
7364 }
7365
7366 /*
7367 * We need to translate between nfs status return values and
7368 * the local errno values which may not be the same.
7369 */
7370 static struct {
7371 int stat;
7372 int errno;
7373 } nfs_errtbl[] = {
7374 { NFS4_OK, 0 },
7375 { NFS4ERR_PERM, -EPERM },
7376 { NFS4ERR_NOENT, -ENOENT },
7377 { NFS4ERR_IO, -errno_NFSERR_IO},
7378 { NFS4ERR_NXIO, -ENXIO },
7379 { NFS4ERR_ACCESS, -EACCES },
7380 { NFS4ERR_EXIST, -EEXIST },
7381 { NFS4ERR_XDEV, -EXDEV },
7382 { NFS4ERR_NOTDIR, -ENOTDIR },
7383 { NFS4ERR_ISDIR, -EISDIR },
7384 { NFS4ERR_INVAL, -EINVAL },
7385 { NFS4ERR_FBIG, -EFBIG },
7386 { NFS4ERR_NOSPC, -ENOSPC },
7387 { NFS4ERR_ROFS, -EROFS },
7388 { NFS4ERR_MLINK, -EMLINK },
7389 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7390 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7391 { NFS4ERR_DQUOT, -EDQUOT },
7392 { NFS4ERR_STALE, -ESTALE },
7393 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7394 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7395 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7396 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7397 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7398 { NFS4ERR_BADTYPE, -EBADTYPE },
7399 { NFS4ERR_LOCKED, -EAGAIN },
7400 { NFS4ERR_SYMLINK, -ELOOP },
7401 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7402 { NFS4ERR_DEADLOCK, -EDEADLK },
7403 { -1, -EIO }
7404 };
7405
7406 /*
7407 * Convert an NFS error code to a local one.
7408 * This one is used jointly by NFSv2 and NFSv3.
7409 */
7410 static int
7411 nfs4_stat_to_errno(int stat)
7412 {
7413 int i;
7414 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7415 if (nfs_errtbl[i].stat == stat)
7416 return nfs_errtbl[i].errno;
7417 }
7418 if (stat <= 10000 || stat > 10100) {
7419 /* The server is looney tunes. */
7420 return -EREMOTEIO;
7421 }
7422 /* If we cannot translate the error, the recovery routines should
7423 * handle it.
7424 * Note: remaining NFSv4 error codes have values > 10000, so should
7425 * not conflict with native Linux error codes.
7426 */
7427 return -stat;
7428 }
7429
7430 #define PROC(proc, argtype, restype) \
7431 [NFSPROC4_CLNT_##proc] = { \
7432 .p_proc = NFSPROC4_COMPOUND, \
7433 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7434 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7435 .p_arglen = NFS4_##argtype##_sz, \
7436 .p_replen = NFS4_##restype##_sz, \
7437 .p_statidx = NFSPROC4_CLNT_##proc, \
7438 .p_name = #proc, \
7439 }
7440
7441 struct rpc_procinfo nfs4_procedures[] = {
7442 PROC(READ, enc_read, dec_read),
7443 PROC(WRITE, enc_write, dec_write),
7444 PROC(COMMIT, enc_commit, dec_commit),
7445 PROC(OPEN, enc_open, dec_open),
7446 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7447 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7448 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7449 PROC(CLOSE, enc_close, dec_close),
7450 PROC(SETATTR, enc_setattr, dec_setattr),
7451 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7452 PROC(RENEW, enc_renew, dec_renew),
7453 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7454 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7455 PROC(LOCK, enc_lock, dec_lock),
7456 PROC(LOCKT, enc_lockt, dec_lockt),
7457 PROC(LOCKU, enc_locku, dec_locku),
7458 PROC(ACCESS, enc_access, dec_access),
7459 PROC(GETATTR, enc_getattr, dec_getattr),
7460 PROC(LOOKUP, enc_lookup, dec_lookup),
7461 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7462 PROC(REMOVE, enc_remove, dec_remove),
7463 PROC(RENAME, enc_rename, dec_rename),
7464 PROC(LINK, enc_link, dec_link),
7465 PROC(SYMLINK, enc_symlink, dec_symlink),
7466 PROC(CREATE, enc_create, dec_create),
7467 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7468 PROC(STATFS, enc_statfs, dec_statfs),
7469 PROC(READLINK, enc_readlink, dec_readlink),
7470 PROC(READDIR, enc_readdir, dec_readdir),
7471 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7472 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7473 PROC(GETACL, enc_getacl, dec_getacl),
7474 PROC(SETACL, enc_setacl, dec_setacl),
7475 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7476 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7477 PROC(SECINFO, enc_secinfo, dec_secinfo),
7478 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7479 #if defined(CONFIG_NFS_V4_1)
7480 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7481 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7482 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7483 PROC(SEQUENCE, enc_sequence, dec_sequence),
7484 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7485 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7486 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7487 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7488 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7489 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7490 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7491 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7492 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7493 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7494 PROC(BIND_CONN_TO_SESSION,
7495 enc_bind_conn_to_session, dec_bind_conn_to_session),
7496 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7497 #endif /* CONFIG_NFS_V4_1 */
7498 };
7499
7500 const struct rpc_version nfs_version4 = {
7501 .number = 4,
7502 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7503 .procs = nfs4_procedures
7504 };
7505
7506 /*
7507 * Local variables:
7508 * c-basic-offset: 8
7509 * End:
7510 */
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