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nfsd4: hash deleg stateid only on successful nfs4_set_delegation
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 + \
150 1024) /* large value for CLID_INUSE */
151 #define encode_setclientid_confirm_maxsz \
152 (op_encode_hdr_maxsz + \
153 3 + (NFS4_VERIFIER_SIZE >> 2))
154 #define decode_setclientid_confirm_maxsz \
155 (op_decode_hdr_maxsz)
156 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
157 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
158 #define encode_share_access_maxsz \
159 (2)
160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
161 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
163 #define encode_open_maxsz (op_encode_hdr_maxsz + \
164 2 + encode_share_access_maxsz + 2 + \
165 open_owner_id_maxsz + \
166 encode_opentype_maxsz + \
167 encode_claim_null_maxsz)
168 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
170 decode_ace_maxsz)
171 #define decode_change_info_maxsz (5)
172 #define decode_open_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz + \
174 decode_change_info_maxsz + 1 + \
175 nfs4_fattr_bitmap_maxsz + \
176 decode_delegation_maxsz)
177 #define encode_open_confirm_maxsz \
178 (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 1)
180 #define decode_open_confirm_maxsz \
181 (op_decode_hdr_maxsz + \
182 decode_stateid_maxsz)
183 #define encode_open_downgrade_maxsz \
184 (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 1 + \
186 encode_share_access_maxsz)
187 #define decode_open_downgrade_maxsz \
188 (op_decode_hdr_maxsz + \
189 decode_stateid_maxsz)
190 #define encode_close_maxsz (op_encode_hdr_maxsz + \
191 1 + encode_stateid_maxsz)
192 #define decode_close_maxsz (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + \
196 encode_attrs_maxsz)
197 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
198 nfs4_fattr_bitmap_maxsz)
199 #define encode_read_maxsz (op_encode_hdr_maxsz + \
200 encode_stateid_maxsz + 3)
201 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
202 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
203 2 + encode_verifier_maxsz + 5 + \
204 nfs4_label_maxsz)
205 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
206 decode_verifier_maxsz)
207 #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_readargs *args, struct compound_hdr *hdr)
1560 {
1561 __be32 *p;
1562
1563 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1564 encode_nfs4_stateid(xdr, &args->stateid);
1565
1566 p = reserve_space(xdr, 12);
1567 p = xdr_encode_hyper(p, args->offset);
1568 *p = cpu_to_be32(args->count);
1569 }
1570
1571 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1572 {
1573 uint32_t attrs[3] = {
1574 FATTR4_WORD0_RDATTR_ERROR,
1575 FATTR4_WORD1_MOUNTED_ON_FILEID,
1576 };
1577 uint32_t dircount = readdir->count >> 1;
1578 __be32 *p, verf[2];
1579 uint32_t attrlen = 0;
1580 unsigned int i;
1581
1582 if (readdir->plus) {
1583 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1584 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1585 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1586 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1587 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1588 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1589 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1590 dircount >>= 1;
1591 }
1592 /* Use mounted_on_fileid only if the server supports it */
1593 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1594 attrs[0] |= FATTR4_WORD0_FILEID;
1595 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1596 attrs[i] &= readdir->bitmask[i];
1597 if (attrs[i] != 0)
1598 attrlen = i+1;
1599 }
1600
1601 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1602 encode_uint64(xdr, readdir->cookie);
1603 encode_nfs4_verifier(xdr, &readdir->verifier);
1604 p = reserve_space(xdr, 12 + (attrlen << 2));
1605 *p++ = cpu_to_be32(dircount);
1606 *p++ = cpu_to_be32(readdir->count);
1607 *p++ = cpu_to_be32(attrlen);
1608 for (i = 0; i < attrlen; i++)
1609 *p++ = cpu_to_be32(attrs[i]);
1610 memcpy(verf, readdir->verifier.data, sizeof(verf));
1611
1612 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1613 __func__,
1614 (unsigned long long)readdir->cookie,
1615 verf[0], verf[1],
1616 attrs[0] & readdir->bitmask[0],
1617 attrs[1] & readdir->bitmask[1],
1618 attrs[2] & readdir->bitmask[2]);
1619 }
1620
1621 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1622 {
1623 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1624 }
1625
1626 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1627 {
1628 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1629 encode_string(xdr, name->len, name->name);
1630 }
1631
1632 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1633 {
1634 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1635 encode_string(xdr, oldname->len, oldname->name);
1636 encode_string(xdr, newname->len, newname->name);
1637 }
1638
1639 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1640 struct compound_hdr *hdr)
1641 {
1642 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1643 encode_uint64(xdr, clid);
1644 }
1645
1646 static void
1647 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1648 {
1649 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1650 }
1651
1652 static void
1653 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1654 {
1655 __be32 *p;
1656
1657 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1658 encode_nfs4_stateid(xdr, &zero_stateid);
1659 p = reserve_space(xdr, 2*4);
1660 *p++ = cpu_to_be32(1);
1661 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1662 p = reserve_space(xdr, 4);
1663 *p = cpu_to_be32(arg->acl_len);
1664 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1665 }
1666
1667 static void
1668 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1669 {
1670 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1671 }
1672
1673 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1674 {
1675 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1676 encode_nfs4_stateid(xdr, &arg->stateid);
1677 encode_attrs(xdr, arg->iap, arg->label, server);
1678 }
1679
1680 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1681 {
1682 __be32 *p;
1683
1684 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1685 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1686
1687 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1688 p = reserve_space(xdr, 4);
1689 *p = cpu_to_be32(setclientid->sc_prog);
1690 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1691 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1692 p = reserve_space(xdr, 4);
1693 *p = cpu_to_be32(setclientid->sc_cb_ident);
1694 }
1695
1696 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1697 {
1698 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1699 decode_setclientid_confirm_maxsz, hdr);
1700 encode_uint64(xdr, arg->clientid);
1701 encode_nfs4_verifier(xdr, &arg->confirm);
1702 }
1703
1704 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1705 {
1706 __be32 *p;
1707
1708 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1709 encode_nfs4_stateid(xdr, &args->stateid);
1710
1711 p = reserve_space(xdr, 16);
1712 p = xdr_encode_hyper(p, args->offset);
1713 *p++ = cpu_to_be32(args->stable);
1714 *p = cpu_to_be32(args->count);
1715
1716 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1717 }
1718
1719 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1722 encode_nfs4_stateid(xdr, stateid);
1723 }
1724
1725 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1726 {
1727 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1728 encode_string(xdr, name->len, name->name);
1729 }
1730
1731 #if defined(CONFIG_NFS_V4_1)
1732 /* NFSv4.1 operations */
1733 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1734 struct nfs4_session *session,
1735 struct compound_hdr *hdr)
1736 {
1737 __be32 *p;
1738
1739 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1740 decode_bind_conn_to_session_maxsz, hdr);
1741 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1742 p = xdr_reserve_space(xdr, 8);
1743 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1744 *p = 0; /* use_conn_in_rdma_mode = False */
1745 }
1746
1747 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1748 {
1749 unsigned int i;
1750 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1751 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1752 encode_uint32(xdr, op_map->u.words[i]);
1753 }
1754
1755 static void encode_exchange_id(struct xdr_stream *xdr,
1756 struct nfs41_exchange_id_args *args,
1757 struct compound_hdr *hdr)
1758 {
1759 __be32 *p;
1760 char impl_name[IMPL_NAME_LIMIT];
1761 int len = 0;
1762
1763 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1764 encode_nfs4_verifier(xdr, args->verifier);
1765
1766 encode_string(xdr, args->id_len, args->id);
1767
1768 encode_uint32(xdr, args->flags);
1769 encode_uint32(xdr, args->state_protect.how);
1770
1771 switch (args->state_protect.how) {
1772 case SP4_NONE:
1773 break;
1774 case SP4_MACH_CRED:
1775 encode_op_map(xdr, &args->state_protect.enforce);
1776 encode_op_map(xdr, &args->state_protect.allow);
1777 break;
1778 default:
1779 WARN_ON_ONCE(1);
1780 break;
1781 }
1782
1783 if (send_implementation_id &&
1784 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1785 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1786 <= sizeof(impl_name) + 1)
1787 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1788 utsname()->sysname, utsname()->release,
1789 utsname()->version, utsname()->machine);
1790
1791 if (len > 0) {
1792 encode_uint32(xdr, 1); /* implementation id array length=1 */
1793
1794 encode_string(xdr,
1795 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1796 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1797 encode_string(xdr, len, impl_name);
1798 /* just send zeros for nii_date - the date is in nii_name */
1799 p = reserve_space(xdr, 12);
1800 p = xdr_encode_hyper(p, 0);
1801 *p = cpu_to_be32(0);
1802 } else
1803 encode_uint32(xdr, 0); /* implementation id array length=0 */
1804 }
1805
1806 static void encode_create_session(struct xdr_stream *xdr,
1807 struct nfs41_create_session_args *args,
1808 struct compound_hdr *hdr)
1809 {
1810 __be32 *p;
1811 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1812 uint32_t len;
1813 struct nfs_client *clp = args->client;
1814 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1815 u32 max_resp_sz_cached;
1816
1817 /*
1818 * Assumes OPEN is the biggest non-idempotent compound.
1819 * 2 is the verifier.
1820 */
1821 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1822 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1823
1824 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1825 clp->cl_ipaddr);
1826
1827 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1828 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1829 p = xdr_encode_hyper(p, clp->cl_clientid);
1830 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1831 *p++ = cpu_to_be32(args->flags); /*flags */
1832
1833 /* Fore Channel */
1834 *p++ = cpu_to_be32(0); /* header padding size */
1835 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1837 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1838 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1839 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1840 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1841
1842 /* Back Channel */
1843 *p++ = cpu_to_be32(0); /* header padding size */
1844 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1846 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1847 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1848 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1849 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1850
1851 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1852 *p++ = cpu_to_be32(1);
1853 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1854
1855 /* authsys_parms rfc1831 */
1856 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1857 p = xdr_encode_opaque(p, machine_name, len);
1858 *p++ = cpu_to_be32(0); /* UID */
1859 *p++ = cpu_to_be32(0); /* GID */
1860 *p = cpu_to_be32(0); /* No more gids */
1861 }
1862
1863 static void encode_destroy_session(struct xdr_stream *xdr,
1864 struct nfs4_session *session,
1865 struct compound_hdr *hdr)
1866 {
1867 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1868 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1869 }
1870
1871 static void encode_destroy_clientid(struct xdr_stream *xdr,
1872 uint64_t clientid,
1873 struct compound_hdr *hdr)
1874 {
1875 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1876 encode_uint64(xdr, clientid);
1877 }
1878
1879 static void encode_reclaim_complete(struct xdr_stream *xdr,
1880 struct nfs41_reclaim_complete_args *args,
1881 struct compound_hdr *hdr)
1882 {
1883 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1884 encode_uint32(xdr, args->one_fs);
1885 }
1886 #endif /* CONFIG_NFS_V4_1 */
1887
1888 static void encode_sequence(struct xdr_stream *xdr,
1889 const struct nfs4_sequence_args *args,
1890 struct compound_hdr *hdr)
1891 {
1892 #if defined(CONFIG_NFS_V4_1)
1893 struct nfs4_session *session;
1894 struct nfs4_slot_table *tp;
1895 struct nfs4_slot *slot = args->sa_slot;
1896 __be32 *p;
1897
1898 tp = slot->table;
1899 session = tp->session;
1900 if (!session)
1901 return;
1902
1903 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1904
1905 /*
1906 * Sessionid + seqid + slotid + max slotid + cache_this
1907 */
1908 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1909 "max_slotid=%d cache_this=%d\n",
1910 __func__,
1911 ((u32 *)session->sess_id.data)[0],
1912 ((u32 *)session->sess_id.data)[1],
1913 ((u32 *)session->sess_id.data)[2],
1914 ((u32 *)session->sess_id.data)[3],
1915 slot->seq_nr, slot->slot_nr,
1916 tp->highest_used_slotid, args->sa_cache_this);
1917 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1918 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1919 *p++ = cpu_to_be32(slot->seq_nr);
1920 *p++ = cpu_to_be32(slot->slot_nr);
1921 *p++ = cpu_to_be32(tp->highest_used_slotid);
1922 *p = cpu_to_be32(args->sa_cache_this);
1923 #endif /* CONFIG_NFS_V4_1 */
1924 }
1925
1926 #ifdef CONFIG_NFS_V4_1
1927 static void
1928 encode_getdevicelist(struct xdr_stream *xdr,
1929 const struct nfs4_getdevicelist_args *args,
1930 struct compound_hdr *hdr)
1931 {
1932 __be32 *p;
1933 nfs4_verifier dummy = {
1934 .data = "dummmmmy",
1935 };
1936
1937 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1938 p = reserve_space(xdr, 16);
1939 *p++ = cpu_to_be32(args->layoutclass);
1940 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1941 xdr_encode_hyper(p, 0ULL); /* cookie */
1942 encode_nfs4_verifier(xdr, &dummy);
1943 }
1944
1945 static void
1946 encode_getdeviceinfo(struct xdr_stream *xdr,
1947 const struct nfs4_getdeviceinfo_args *args,
1948 struct compound_hdr *hdr)
1949 {
1950 __be32 *p;
1951
1952 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1953 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1954 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1955 NFS4_DEVICEID4_SIZE);
1956 *p++ = cpu_to_be32(args->pdev->layout_type);
1957 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1958 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1959 }
1960
1961 static void
1962 encode_layoutget(struct xdr_stream *xdr,
1963 const struct nfs4_layoutget_args *args,
1964 struct compound_hdr *hdr)
1965 {
1966 __be32 *p;
1967
1968 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1969 p = reserve_space(xdr, 36);
1970 *p++ = cpu_to_be32(0); /* Signal layout available */
1971 *p++ = cpu_to_be32(args->type);
1972 *p++ = cpu_to_be32(args->range.iomode);
1973 p = xdr_encode_hyper(p, args->range.offset);
1974 p = xdr_encode_hyper(p, args->range.length);
1975 p = xdr_encode_hyper(p, args->minlength);
1976 encode_nfs4_stateid(xdr, &args->stateid);
1977 encode_uint32(xdr, args->maxcount);
1978
1979 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1980 __func__,
1981 args->type,
1982 args->range.iomode,
1983 (unsigned long)args->range.offset,
1984 (unsigned long)args->range.length,
1985 args->maxcount);
1986 }
1987
1988 static int
1989 encode_layoutcommit(struct xdr_stream *xdr,
1990 struct inode *inode,
1991 const struct nfs4_layoutcommit_args *args,
1992 struct compound_hdr *hdr)
1993 {
1994 __be32 *p;
1995
1996 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1997 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1998
1999 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2000 p = reserve_space(xdr, 20);
2001 /* Only whole file layouts */
2002 p = xdr_encode_hyper(p, 0); /* offset */
2003 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2004 *p = cpu_to_be32(0); /* reclaim */
2005 encode_nfs4_stateid(xdr, &args->stateid);
2006 p = reserve_space(xdr, 20);
2007 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2008 p = xdr_encode_hyper(p, args->lastbytewritten);
2009 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2010 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2011
2012 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2013 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2014 NFS_I(inode)->layout, xdr, args);
2015 else
2016 encode_uint32(xdr, 0); /* no layout-type payload */
2017
2018 return 0;
2019 }
2020
2021 static void
2022 encode_layoutreturn(struct xdr_stream *xdr,
2023 const struct nfs4_layoutreturn_args *args,
2024 struct compound_hdr *hdr)
2025 {
2026 __be32 *p;
2027
2028 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2029 p = reserve_space(xdr, 16);
2030 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2031 *p++ = cpu_to_be32(args->layout_type);
2032 *p++ = cpu_to_be32(IOMODE_ANY);
2033 *p = cpu_to_be32(RETURN_FILE);
2034 p = reserve_space(xdr, 16);
2035 p = xdr_encode_hyper(p, 0);
2036 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2037 spin_lock(&args->inode->i_lock);
2038 encode_nfs4_stateid(xdr, &args->stateid);
2039 spin_unlock(&args->inode->i_lock);
2040 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2041 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2042 NFS_I(args->inode)->layout, xdr, args);
2043 } else
2044 encode_uint32(xdr, 0);
2045 }
2046
2047 static int
2048 encode_secinfo_no_name(struct xdr_stream *xdr,
2049 const struct nfs41_secinfo_no_name_args *args,
2050 struct compound_hdr *hdr)
2051 {
2052 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2053 encode_uint32(xdr, args->style);
2054 return 0;
2055 }
2056
2057 static void encode_test_stateid(struct xdr_stream *xdr,
2058 struct nfs41_test_stateid_args *args,
2059 struct compound_hdr *hdr)
2060 {
2061 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2062 encode_uint32(xdr, 1);
2063 encode_nfs4_stateid(xdr, args->stateid);
2064 }
2065
2066 static void encode_free_stateid(struct xdr_stream *xdr,
2067 struct nfs41_free_stateid_args *args,
2068 struct compound_hdr *hdr)
2069 {
2070 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2071 encode_nfs4_stateid(xdr, &args->stateid);
2072 }
2073 #endif /* CONFIG_NFS_V4_1 */
2074
2075 /*
2076 * END OF "GENERIC" ENCODE ROUTINES.
2077 */
2078
2079 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2080 {
2081 #if defined(CONFIG_NFS_V4_1)
2082 struct nfs4_session *session = args->sa_slot->table->session;
2083 if (session)
2084 return session->clp->cl_mvops->minor_version;
2085 #endif /* CONFIG_NFS_V4_1 */
2086 return 0;
2087 }
2088
2089 /*
2090 * Encode an ACCESS request
2091 */
2092 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2093 const struct nfs4_accessargs *args)
2094 {
2095 struct compound_hdr hdr = {
2096 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2097 };
2098
2099 encode_compound_hdr(xdr, req, &hdr);
2100 encode_sequence(xdr, &args->seq_args, &hdr);
2101 encode_putfh(xdr, args->fh, &hdr);
2102 encode_access(xdr, args->access, &hdr);
2103 encode_getfattr(xdr, args->bitmask, &hdr);
2104 encode_nops(&hdr);
2105 }
2106
2107 /*
2108 * Encode LOOKUP request
2109 */
2110 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2111 const struct nfs4_lookup_arg *args)
2112 {
2113 struct compound_hdr hdr = {
2114 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115 };
2116
2117 encode_compound_hdr(xdr, req, &hdr);
2118 encode_sequence(xdr, &args->seq_args, &hdr);
2119 encode_putfh(xdr, args->dir_fh, &hdr);
2120 encode_lookup(xdr, args->name, &hdr);
2121 encode_getfh(xdr, &hdr);
2122 encode_getfattr(xdr, args->bitmask, &hdr);
2123 encode_nops(&hdr);
2124 }
2125
2126 /*
2127 * Encode LOOKUP_ROOT request
2128 */
2129 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2130 struct xdr_stream *xdr,
2131 const struct nfs4_lookup_root_arg *args)
2132 {
2133 struct compound_hdr hdr = {
2134 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135 };
2136
2137 encode_compound_hdr(xdr, req, &hdr);
2138 encode_sequence(xdr, &args->seq_args, &hdr);
2139 encode_putrootfh(xdr, &hdr);
2140 encode_getfh(xdr, &hdr);
2141 encode_getfattr(xdr, args->bitmask, &hdr);
2142 encode_nops(&hdr);
2143 }
2144
2145 /*
2146 * Encode REMOVE request
2147 */
2148 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2149 const struct nfs_removeargs *args)
2150 {
2151 struct compound_hdr hdr = {
2152 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153 };
2154
2155 encode_compound_hdr(xdr, req, &hdr);
2156 encode_sequence(xdr, &args->seq_args, &hdr);
2157 encode_putfh(xdr, args->fh, &hdr);
2158 encode_remove(xdr, &args->name, &hdr);
2159 encode_nops(&hdr);
2160 }
2161
2162 /*
2163 * Encode RENAME request
2164 */
2165 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2166 const struct nfs_renameargs *args)
2167 {
2168 struct compound_hdr hdr = {
2169 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2170 };
2171
2172 encode_compound_hdr(xdr, req, &hdr);
2173 encode_sequence(xdr, &args->seq_args, &hdr);
2174 encode_putfh(xdr, args->old_dir, &hdr);
2175 encode_savefh(xdr, &hdr);
2176 encode_putfh(xdr, args->new_dir, &hdr);
2177 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2178 encode_nops(&hdr);
2179 }
2180
2181 /*
2182 * Encode LINK request
2183 */
2184 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2185 const struct nfs4_link_arg *args)
2186 {
2187 struct compound_hdr hdr = {
2188 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2189 };
2190
2191 encode_compound_hdr(xdr, req, &hdr);
2192 encode_sequence(xdr, &args->seq_args, &hdr);
2193 encode_putfh(xdr, args->fh, &hdr);
2194 encode_savefh(xdr, &hdr);
2195 encode_putfh(xdr, args->dir_fh, &hdr);
2196 encode_link(xdr, args->name, &hdr);
2197 encode_restorefh(xdr, &hdr);
2198 encode_getfattr(xdr, args->bitmask, &hdr);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode CREATE request
2204 */
2205 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 const struct nfs4_create_arg *args)
2207 {
2208 struct compound_hdr hdr = {
2209 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2210 };
2211
2212 encode_compound_hdr(xdr, req, &hdr);
2213 encode_sequence(xdr, &args->seq_args, &hdr);
2214 encode_putfh(xdr, args->dir_fh, &hdr);
2215 encode_create(xdr, args, &hdr);
2216 encode_getfh(xdr, &hdr);
2217 encode_getfattr(xdr, args->bitmask, &hdr);
2218 encode_nops(&hdr);
2219 }
2220
2221 /*
2222 * Encode SYMLINK request
2223 */
2224 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2225 const struct nfs4_create_arg *args)
2226 {
2227 nfs4_xdr_enc_create(req, xdr, args);
2228 }
2229
2230 /*
2231 * Encode GETATTR request
2232 */
2233 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2234 const struct nfs4_getattr_arg *args)
2235 {
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->fh, &hdr);
2243 encode_getfattr(xdr, args->bitmask, &hdr);
2244 encode_nops(&hdr);
2245 }
2246
2247 /*
2248 * Encode a CLOSE request
2249 */
2250 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2251 struct nfs_closeargs *args)
2252 {
2253 struct compound_hdr hdr = {
2254 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255 };
2256
2257 encode_compound_hdr(xdr, req, &hdr);
2258 encode_sequence(xdr, &args->seq_args, &hdr);
2259 encode_putfh(xdr, args->fh, &hdr);
2260 encode_close(xdr, args, &hdr);
2261 encode_getfattr(xdr, args->bitmask, &hdr);
2262 encode_nops(&hdr);
2263 }
2264
2265 /*
2266 * Encode an OPEN request
2267 */
2268 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2269 struct nfs_openargs *args)
2270 {
2271 struct compound_hdr hdr = {
2272 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273 };
2274
2275 encode_compound_hdr(xdr, req, &hdr);
2276 encode_sequence(xdr, &args->seq_args, &hdr);
2277 encode_putfh(xdr, args->fh, &hdr);
2278 encode_open(xdr, args, &hdr);
2279 encode_getfh(xdr, &hdr);
2280 if (args->access)
2281 encode_access(xdr, args->access, &hdr);
2282 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2283 encode_nops(&hdr);
2284 }
2285
2286 /*
2287 * Encode an OPEN_CONFIRM request
2288 */
2289 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2290 struct xdr_stream *xdr,
2291 struct nfs_open_confirmargs *args)
2292 {
2293 struct compound_hdr hdr = {
2294 .nops = 0,
2295 };
2296
2297 encode_compound_hdr(xdr, req, &hdr);
2298 encode_putfh(xdr, args->fh, &hdr);
2299 encode_open_confirm(xdr, args, &hdr);
2300 encode_nops(&hdr);
2301 }
2302
2303 /*
2304 * Encode an OPEN request with no attributes.
2305 */
2306 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2307 struct xdr_stream *xdr,
2308 struct nfs_openargs *args)
2309 {
2310 struct compound_hdr hdr = {
2311 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312 };
2313
2314 encode_compound_hdr(xdr, req, &hdr);
2315 encode_sequence(xdr, &args->seq_args, &hdr);
2316 encode_putfh(xdr, args->fh, &hdr);
2317 encode_open(xdr, args, &hdr);
2318 if (args->access)
2319 encode_access(xdr, args->access, &hdr);
2320 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2321 encode_nops(&hdr);
2322 }
2323
2324 /*
2325 * Encode an OPEN_DOWNGRADE request
2326 */
2327 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2328 struct xdr_stream *xdr,
2329 struct nfs_closeargs *args)
2330 {
2331 struct compound_hdr hdr = {
2332 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2333 };
2334
2335 encode_compound_hdr(xdr, req, &hdr);
2336 encode_sequence(xdr, &args->seq_args, &hdr);
2337 encode_putfh(xdr, args->fh, &hdr);
2338 encode_open_downgrade(xdr, args, &hdr);
2339 encode_getfattr(xdr, args->bitmask, &hdr);
2340 encode_nops(&hdr);
2341 }
2342
2343 /*
2344 * Encode a LOCK request
2345 */
2346 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2347 struct nfs_lock_args *args)
2348 {
2349 struct compound_hdr hdr = {
2350 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351 };
2352
2353 encode_compound_hdr(xdr, req, &hdr);
2354 encode_sequence(xdr, &args->seq_args, &hdr);
2355 encode_putfh(xdr, args->fh, &hdr);
2356 encode_lock(xdr, args, &hdr);
2357 encode_nops(&hdr);
2358 }
2359
2360 /*
2361 * Encode a LOCKT request
2362 */
2363 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2364 struct nfs_lockt_args *args)
2365 {
2366 struct compound_hdr hdr = {
2367 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368 };
2369
2370 encode_compound_hdr(xdr, req, &hdr);
2371 encode_sequence(xdr, &args->seq_args, &hdr);
2372 encode_putfh(xdr, args->fh, &hdr);
2373 encode_lockt(xdr, args, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode a LOCKU request
2379 */
2380 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2381 struct nfs_locku_args *args)
2382 {
2383 struct compound_hdr hdr = {
2384 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385 };
2386
2387 encode_compound_hdr(xdr, req, &hdr);
2388 encode_sequence(xdr, &args->seq_args, &hdr);
2389 encode_putfh(xdr, args->fh, &hdr);
2390 encode_locku(xdr, args, &hdr);
2391 encode_nops(&hdr);
2392 }
2393
2394 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2395 struct xdr_stream *xdr,
2396 struct nfs_release_lockowner_args *args)
2397 {
2398 struct compound_hdr hdr = {
2399 .minorversion = 0,
2400 };
2401
2402 encode_compound_hdr(xdr, req, &hdr);
2403 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2404 encode_nops(&hdr);
2405 }
2406
2407 /*
2408 * Encode a READLINK request
2409 */
2410 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2411 const struct nfs4_readlink *args)
2412 {
2413 struct compound_hdr hdr = {
2414 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2415 };
2416
2417 encode_compound_hdr(xdr, req, &hdr);
2418 encode_sequence(xdr, &args->seq_args, &hdr);
2419 encode_putfh(xdr, args->fh, &hdr);
2420 encode_readlink(xdr, args, req, &hdr);
2421
2422 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2423 args->pgbase, args->pglen);
2424 encode_nops(&hdr);
2425 }
2426
2427 /*
2428 * Encode a READDIR request
2429 */
2430 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2431 const struct nfs4_readdir_arg *args)
2432 {
2433 struct compound_hdr hdr = {
2434 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435 };
2436
2437 encode_compound_hdr(xdr, req, &hdr);
2438 encode_sequence(xdr, &args->seq_args, &hdr);
2439 encode_putfh(xdr, args->fh, &hdr);
2440 encode_readdir(xdr, args, req, &hdr);
2441
2442 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2443 args->pgbase, args->count);
2444 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2445 __func__, hdr.replen << 2, args->pages,
2446 args->pgbase, args->count);
2447 encode_nops(&hdr);
2448 }
2449
2450 /*
2451 * Encode a READ request
2452 */
2453 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2454 struct nfs_readargs *args)
2455 {
2456 struct compound_hdr hdr = {
2457 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2458 };
2459
2460 encode_compound_hdr(xdr, req, &hdr);
2461 encode_sequence(xdr, &args->seq_args, &hdr);
2462 encode_putfh(xdr, args->fh, &hdr);
2463 encode_read(xdr, args, &hdr);
2464
2465 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2466 args->pages, args->pgbase, args->count);
2467 req->rq_rcv_buf.flags |= XDRBUF_READ;
2468 encode_nops(&hdr);
2469 }
2470
2471 /*
2472 * Encode an SETATTR request
2473 */
2474 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2475 struct nfs_setattrargs *args)
2476 {
2477 struct compound_hdr hdr = {
2478 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2479 };
2480
2481 encode_compound_hdr(xdr, req, &hdr);
2482 encode_sequence(xdr, &args->seq_args, &hdr);
2483 encode_putfh(xdr, args->fh, &hdr);
2484 encode_setattr(xdr, args, args->server, &hdr);
2485 encode_getfattr(xdr, args->bitmask, &hdr);
2486 encode_nops(&hdr);
2487 }
2488
2489 /*
2490 * Encode a GETACL request
2491 */
2492 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2493 struct nfs_getaclargs *args)
2494 {
2495 struct compound_hdr hdr = {
2496 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497 };
2498 uint32_t replen;
2499
2500 encode_compound_hdr(xdr, req, &hdr);
2501 encode_sequence(xdr, &args->seq_args, &hdr);
2502 encode_putfh(xdr, args->fh, &hdr);
2503 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2504 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2505
2506 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2507 args->acl_pages, args->acl_pgbase, args->acl_len);
2508
2509 encode_nops(&hdr);
2510 }
2511
2512 /*
2513 * Encode a WRITE request
2514 */
2515 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2516 struct nfs_writeargs *args)
2517 {
2518 struct compound_hdr hdr = {
2519 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520 };
2521
2522 encode_compound_hdr(xdr, req, &hdr);
2523 encode_sequence(xdr, &args->seq_args, &hdr);
2524 encode_putfh(xdr, args->fh, &hdr);
2525 encode_write(xdr, args, &hdr);
2526 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2527 if (args->bitmask)
2528 encode_getfattr(xdr, args->bitmask, &hdr);
2529 encode_nops(&hdr);
2530 }
2531
2532 /*
2533 * a COMMIT request
2534 */
2535 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2536 struct nfs_commitargs *args)
2537 {
2538 struct compound_hdr hdr = {
2539 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540 };
2541
2542 encode_compound_hdr(xdr, req, &hdr);
2543 encode_sequence(xdr, &args->seq_args, &hdr);
2544 encode_putfh(xdr, args->fh, &hdr);
2545 encode_commit(xdr, args, &hdr);
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * FSINFO request
2551 */
2552 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 struct nfs4_fsinfo_arg *args)
2554 {
2555 struct compound_hdr hdr = {
2556 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557 };
2558
2559 encode_compound_hdr(xdr, req, &hdr);
2560 encode_sequence(xdr, &args->seq_args, &hdr);
2561 encode_putfh(xdr, args->fh, &hdr);
2562 encode_fsinfo(xdr, args->bitmask, &hdr);
2563 encode_nops(&hdr);
2564 }
2565
2566 /*
2567 * a PATHCONF request
2568 */
2569 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2570 const struct nfs4_pathconf_arg *args)
2571 {
2572 struct compound_hdr hdr = {
2573 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574 };
2575
2576 encode_compound_hdr(xdr, req, &hdr);
2577 encode_sequence(xdr, &args->seq_args, &hdr);
2578 encode_putfh(xdr, args->fh, &hdr);
2579 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2580 &hdr);
2581 encode_nops(&hdr);
2582 }
2583
2584 /*
2585 * a STATFS request
2586 */
2587 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2588 const struct nfs4_statfs_arg *args)
2589 {
2590 struct compound_hdr hdr = {
2591 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592 };
2593
2594 encode_compound_hdr(xdr, req, &hdr);
2595 encode_sequence(xdr, &args->seq_args, &hdr);
2596 encode_putfh(xdr, args->fh, &hdr);
2597 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2598 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2599 encode_nops(&hdr);
2600 }
2601
2602 /*
2603 * GETATTR_BITMAP request
2604 */
2605 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2606 struct xdr_stream *xdr,
2607 struct nfs4_server_caps_arg *args)
2608 {
2609 struct compound_hdr hdr = {
2610 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2611 };
2612
2613 encode_compound_hdr(xdr, req, &hdr);
2614 encode_sequence(xdr, &args->seq_args, &hdr);
2615 encode_putfh(xdr, args->fhandle, &hdr);
2616 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2617 FATTR4_WORD0_FH_EXPIRE_TYPE|
2618 FATTR4_WORD0_LINK_SUPPORT|
2619 FATTR4_WORD0_SYMLINK_SUPPORT|
2620 FATTR4_WORD0_ACLSUPPORT, &hdr);
2621 encode_nops(&hdr);
2622 }
2623
2624 /*
2625 * a RENEW request
2626 */
2627 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2628 struct nfs_client *clp)
2629 {
2630 struct compound_hdr hdr = {
2631 .nops = 0,
2632 };
2633
2634 encode_compound_hdr(xdr, req, &hdr);
2635 encode_renew(xdr, clp->cl_clientid, &hdr);
2636 encode_nops(&hdr);
2637 }
2638
2639 /*
2640 * a SETCLIENTID request
2641 */
2642 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2643 struct xdr_stream *xdr,
2644 struct nfs4_setclientid *sc)
2645 {
2646 struct compound_hdr hdr = {
2647 .nops = 0,
2648 };
2649
2650 encode_compound_hdr(xdr, req, &hdr);
2651 encode_setclientid(xdr, sc, &hdr);
2652 encode_nops(&hdr);
2653 }
2654
2655 /*
2656 * a SETCLIENTID_CONFIRM request
2657 */
2658 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2659 struct xdr_stream *xdr,
2660 struct nfs4_setclientid_res *arg)
2661 {
2662 struct compound_hdr hdr = {
2663 .nops = 0,
2664 };
2665
2666 encode_compound_hdr(xdr, req, &hdr);
2667 encode_setclientid_confirm(xdr, arg, &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * DELEGRETURN request
2673 */
2674 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2675 struct xdr_stream *xdr,
2676 const struct nfs4_delegreturnargs *args)
2677 {
2678 struct compound_hdr hdr = {
2679 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680 };
2681
2682 encode_compound_hdr(xdr, req, &hdr);
2683 encode_sequence(xdr, &args->seq_args, &hdr);
2684 encode_putfh(xdr, args->fhandle, &hdr);
2685 encode_getfattr(xdr, args->bitmask, &hdr);
2686 encode_delegreturn(xdr, args->stateid, &hdr);
2687 encode_nops(&hdr);
2688 }
2689
2690 /*
2691 * Encode FS_LOCATIONS request
2692 */
2693 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 struct nfs4_fs_locations_arg *args)
2696 {
2697 struct compound_hdr hdr = {
2698 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2699 };
2700 uint32_t replen;
2701
2702 encode_compound_hdr(xdr, req, &hdr);
2703 encode_sequence(xdr, &args->seq_args, &hdr);
2704 if (args->migration) {
2705 encode_putfh(xdr, args->fh, &hdr);
2706 replen = hdr.replen;
2707 encode_fs_locations(xdr, args->bitmask, &hdr);
2708 if (args->renew)
2709 encode_renew(xdr, args->clientid, &hdr);
2710 } else {
2711 encode_putfh(xdr, args->dir_fh, &hdr);
2712 encode_lookup(xdr, args->name, &hdr);
2713 replen = hdr.replen;
2714 encode_fs_locations(xdr, args->bitmask, &hdr);
2715 }
2716
2717 /* Set up reply kvec to capture returned fs_locations array. */
2718 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2719 0, PAGE_SIZE);
2720 encode_nops(&hdr);
2721 }
2722
2723 /*
2724 * Encode SECINFO request
2725 */
2726 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2727 struct xdr_stream *xdr,
2728 struct nfs4_secinfo_arg *args)
2729 {
2730 struct compound_hdr hdr = {
2731 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2732 };
2733
2734 encode_compound_hdr(xdr, req, &hdr);
2735 encode_sequence(xdr, &args->seq_args, &hdr);
2736 encode_putfh(xdr, args->dir_fh, &hdr);
2737 encode_secinfo(xdr, args->name, &hdr);
2738 encode_nops(&hdr);
2739 }
2740
2741 /*
2742 * Encode FSID_PRESENT request
2743 */
2744 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2745 struct xdr_stream *xdr,
2746 struct nfs4_fsid_present_arg *args)
2747 {
2748 struct compound_hdr hdr = {
2749 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2750 };
2751
2752 encode_compound_hdr(xdr, req, &hdr);
2753 encode_sequence(xdr, &args->seq_args, &hdr);
2754 encode_putfh(xdr, args->fh, &hdr);
2755 encode_getfh(xdr, &hdr);
2756 if (args->renew)
2757 encode_renew(xdr, args->clientid, &hdr);
2758 encode_nops(&hdr);
2759 }
2760
2761 #if defined(CONFIG_NFS_V4_1)
2762 /*
2763 * BIND_CONN_TO_SESSION request
2764 */
2765 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2766 struct xdr_stream *xdr,
2767 struct nfs_client *clp)
2768 {
2769 struct compound_hdr hdr = {
2770 .minorversion = clp->cl_mvops->minor_version,
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2775 encode_nops(&hdr);
2776 }
2777
2778 /*
2779 * EXCHANGE_ID request
2780 */
2781 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2782 struct xdr_stream *xdr,
2783 struct nfs41_exchange_id_args *args)
2784 {
2785 struct compound_hdr hdr = {
2786 .minorversion = args->client->cl_mvops->minor_version,
2787 };
2788
2789 encode_compound_hdr(xdr, req, &hdr);
2790 encode_exchange_id(xdr, args, &hdr);
2791 encode_nops(&hdr);
2792 }
2793
2794 /*
2795 * a CREATE_SESSION request
2796 */
2797 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2798 struct xdr_stream *xdr,
2799 struct nfs41_create_session_args *args)
2800 {
2801 struct compound_hdr hdr = {
2802 .minorversion = args->client->cl_mvops->minor_version,
2803 };
2804
2805 encode_compound_hdr(xdr, req, &hdr);
2806 encode_create_session(xdr, args, &hdr);
2807 encode_nops(&hdr);
2808 }
2809
2810 /*
2811 * a DESTROY_SESSION request
2812 */
2813 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2814 struct xdr_stream *xdr,
2815 struct nfs4_session *session)
2816 {
2817 struct compound_hdr hdr = {
2818 .minorversion = session->clp->cl_mvops->minor_version,
2819 };
2820
2821 encode_compound_hdr(xdr, req, &hdr);
2822 encode_destroy_session(xdr, session, &hdr);
2823 encode_nops(&hdr);
2824 }
2825
2826 /*
2827 * a DESTROY_CLIENTID request
2828 */
2829 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2830 struct xdr_stream *xdr,
2831 struct nfs_client *clp)
2832 {
2833 struct compound_hdr hdr = {
2834 .minorversion = clp->cl_mvops->minor_version,
2835 };
2836
2837 encode_compound_hdr(xdr, req, &hdr);
2838 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2839 encode_nops(&hdr);
2840 }
2841
2842 /*
2843 * a SEQUENCE request
2844 */
2845 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2846 struct nfs4_sequence_args *args)
2847 {
2848 struct compound_hdr hdr = {
2849 .minorversion = nfs4_xdr_minorversion(args),
2850 };
2851
2852 encode_compound_hdr(xdr, req, &hdr);
2853 encode_sequence(xdr, args, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 /*
2858 * a GET_LEASE_TIME request
2859 */
2860 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2861 struct xdr_stream *xdr,
2862 struct nfs4_get_lease_time_args *args)
2863 {
2864 struct compound_hdr hdr = {
2865 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2866 };
2867 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_sequence(xdr, &args->la_seq_args, &hdr);
2871 encode_putrootfh(xdr, &hdr);
2872 encode_fsinfo(xdr, lease_bitmap, &hdr);
2873 encode_nops(&hdr);
2874 }
2875
2876 /*
2877 * a RECLAIM_COMPLETE request
2878 */
2879 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2880 struct xdr_stream *xdr,
2881 struct nfs41_reclaim_complete_args *args)
2882 {
2883 struct compound_hdr hdr = {
2884 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_sequence(xdr, &args->seq_args, &hdr);
2889 encode_reclaim_complete(xdr, args, &hdr);
2890 encode_nops(&hdr);
2891 }
2892
2893 /*
2894 * Encode GETDEVICELIST request
2895 */
2896 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2897 struct xdr_stream *xdr,
2898 struct nfs4_getdevicelist_args *args)
2899 {
2900 struct compound_hdr hdr = {
2901 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_sequence(xdr, &args->seq_args, &hdr);
2906 encode_putfh(xdr, args->fh, &hdr);
2907 encode_getdevicelist(xdr, args, &hdr);
2908 encode_nops(&hdr);
2909 }
2910
2911 /*
2912 * Encode GETDEVICEINFO request
2913 */
2914 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2915 struct xdr_stream *xdr,
2916 struct nfs4_getdeviceinfo_args *args)
2917 {
2918 struct compound_hdr hdr = {
2919 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920 };
2921
2922 encode_compound_hdr(xdr, req, &hdr);
2923 encode_sequence(xdr, &args->seq_args, &hdr);
2924 encode_getdeviceinfo(xdr, args, &hdr);
2925
2926 /* set up reply kvec. Subtract notification bitmap max size (2)
2927 * so that notification bitmap is put in xdr_buf tail */
2928 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2929 args->pdev->pages, args->pdev->pgbase,
2930 args->pdev->pglen);
2931
2932 encode_nops(&hdr);
2933 }
2934
2935 /*
2936 * Encode LAYOUTGET request
2937 */
2938 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2939 struct xdr_stream *xdr,
2940 struct nfs4_layoutget_args *args)
2941 {
2942 struct compound_hdr hdr = {
2943 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944 };
2945
2946 encode_compound_hdr(xdr, req, &hdr);
2947 encode_sequence(xdr, &args->seq_args, &hdr);
2948 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2949 encode_layoutget(xdr, args, &hdr);
2950
2951 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2952 args->layout.pages, 0, args->layout.pglen);
2953
2954 encode_nops(&hdr);
2955 }
2956
2957 /*
2958 * Encode LAYOUTCOMMIT request
2959 */
2960 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2961 struct xdr_stream *xdr,
2962 struct nfs4_layoutcommit_args *args)
2963 {
2964 struct nfs4_layoutcommit_data *data =
2965 container_of(args, struct nfs4_layoutcommit_data, args);
2966 struct compound_hdr hdr = {
2967 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2968 };
2969
2970 encode_compound_hdr(xdr, req, &hdr);
2971 encode_sequence(xdr, &args->seq_args, &hdr);
2972 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2973 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2974 encode_getfattr(xdr, args->bitmask, &hdr);
2975 encode_nops(&hdr);
2976 }
2977
2978 /*
2979 * Encode LAYOUTRETURN request
2980 */
2981 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2982 struct xdr_stream *xdr,
2983 struct nfs4_layoutreturn_args *args)
2984 {
2985 struct compound_hdr hdr = {
2986 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2987 };
2988
2989 encode_compound_hdr(xdr, req, &hdr);
2990 encode_sequence(xdr, &args->seq_args, &hdr);
2991 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2992 encode_layoutreturn(xdr, args, &hdr);
2993 encode_nops(&hdr);
2994 }
2995
2996 /*
2997 * Encode SECINFO_NO_NAME request
2998 */
2999 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3000 struct xdr_stream *xdr,
3001 struct nfs41_secinfo_no_name_args *args)
3002 {
3003 struct compound_hdr hdr = {
3004 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3005 };
3006
3007 encode_compound_hdr(xdr, req, &hdr);
3008 encode_sequence(xdr, &args->seq_args, &hdr);
3009 encode_putrootfh(xdr, &hdr);
3010 encode_secinfo_no_name(xdr, args, &hdr);
3011 encode_nops(&hdr);
3012 return 0;
3013 }
3014
3015 /*
3016 * Encode TEST_STATEID request
3017 */
3018 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3019 struct xdr_stream *xdr,
3020 struct nfs41_test_stateid_args *args)
3021 {
3022 struct compound_hdr hdr = {
3023 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3024 };
3025
3026 encode_compound_hdr(xdr, req, &hdr);
3027 encode_sequence(xdr, &args->seq_args, &hdr);
3028 encode_test_stateid(xdr, args, &hdr);
3029 encode_nops(&hdr);
3030 }
3031
3032 /*
3033 * Encode FREE_STATEID request
3034 */
3035 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3036 struct xdr_stream *xdr,
3037 struct nfs41_free_stateid_args *args)
3038 {
3039 struct compound_hdr hdr = {
3040 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3041 };
3042
3043 encode_compound_hdr(xdr, req, &hdr);
3044 encode_sequence(xdr, &args->seq_args, &hdr);
3045 encode_free_stateid(xdr, args, &hdr);
3046 encode_nops(&hdr);
3047 }
3048 #endif /* CONFIG_NFS_V4_1 */
3049
3050 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3051 {
3052 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3053 "Remaining buffer length is %tu words.\n",
3054 func, xdr->end - xdr->p);
3055 }
3056
3057 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3058 {
3059 __be32 *p;
3060
3061 p = xdr_inline_decode(xdr, 4);
3062 if (unlikely(!p))
3063 goto out_overflow;
3064 *len = be32_to_cpup(p);
3065 p = xdr_inline_decode(xdr, *len);
3066 if (unlikely(!p))
3067 goto out_overflow;
3068 *string = (char *)p;
3069 return 0;
3070 out_overflow:
3071 print_overflow_msg(__func__, xdr);
3072 return -EIO;
3073 }
3074
3075 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3076 {
3077 __be32 *p;
3078
3079 p = xdr_inline_decode(xdr, 8);
3080 if (unlikely(!p))
3081 goto out_overflow;
3082 hdr->status = be32_to_cpup(p++);
3083 hdr->taglen = be32_to_cpup(p);
3084
3085 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3086 if (unlikely(!p))
3087 goto out_overflow;
3088 hdr->tag = (char *)p;
3089 p += XDR_QUADLEN(hdr->taglen);
3090 hdr->nops = be32_to_cpup(p);
3091 if (unlikely(hdr->nops < 1))
3092 return nfs4_stat_to_errno(hdr->status);
3093 return 0;
3094 out_overflow:
3095 print_overflow_msg(__func__, xdr);
3096 return -EIO;
3097 }
3098
3099 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3100 int *nfs_retval)
3101 {
3102 __be32 *p;
3103 uint32_t opnum;
3104 int32_t nfserr;
3105
3106 p = xdr_inline_decode(xdr, 8);
3107 if (unlikely(!p))
3108 goto out_overflow;
3109 opnum = be32_to_cpup(p++);
3110 if (unlikely(opnum != expected))
3111 goto out_bad_operation;
3112 nfserr = be32_to_cpup(p);
3113 if (nfserr == NFS_OK)
3114 *nfs_retval = 0;
3115 else
3116 *nfs_retval = nfs4_stat_to_errno(nfserr);
3117 return true;
3118 out_bad_operation:
3119 dprintk("nfs: Server returned operation"
3120 " %d but we issued a request for %d\n",
3121 opnum, expected);
3122 *nfs_retval = -EREMOTEIO;
3123 return false;
3124 out_overflow:
3125 print_overflow_msg(__func__, xdr);
3126 *nfs_retval = -EIO;
3127 return false;
3128 }
3129
3130 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3131 {
3132 int retval;
3133
3134 __decode_op_hdr(xdr, expected, &retval);
3135 return retval;
3136 }
3137
3138 /* Dummy routine */
3139 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3140 {
3141 __be32 *p;
3142 unsigned int strlen;
3143 char *str;
3144
3145 p = xdr_inline_decode(xdr, 12);
3146 if (likely(p))
3147 return decode_opaque_inline(xdr, &strlen, &str);
3148 print_overflow_msg(__func__, xdr);
3149 return -EIO;
3150 }
3151
3152 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3153 {
3154 uint32_t bmlen;
3155 __be32 *p;
3156
3157 p = xdr_inline_decode(xdr, 4);
3158 if (unlikely(!p))
3159 goto out_overflow;
3160 bmlen = be32_to_cpup(p);
3161
3162 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3163 p = xdr_inline_decode(xdr, (bmlen << 2));
3164 if (unlikely(!p))
3165 goto out_overflow;
3166 if (bmlen > 0) {
3167 bitmap[0] = be32_to_cpup(p++);
3168 if (bmlen > 1) {
3169 bitmap[1] = be32_to_cpup(p++);
3170 if (bmlen > 2)
3171 bitmap[2] = be32_to_cpup(p);
3172 }
3173 }
3174 return 0;
3175 out_overflow:
3176 print_overflow_msg(__func__, xdr);
3177 return -EIO;
3178 }
3179
3180 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3181 {
3182 __be32 *p;
3183
3184 p = xdr_inline_decode(xdr, 4);
3185 if (unlikely(!p))
3186 goto out_overflow;
3187 *attrlen = be32_to_cpup(p);
3188 *savep = xdr_stream_pos(xdr);
3189 return 0;
3190 out_overflow:
3191 print_overflow_msg(__func__, xdr);
3192 return -EIO;
3193 }
3194
3195 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3196 {
3197 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3198 int ret;
3199 ret = decode_attr_bitmap(xdr, bitmask);
3200 if (unlikely(ret < 0))
3201 return ret;
3202 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3203 } else
3204 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3205 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3206 bitmask[0], bitmask[1], bitmask[2]);
3207 return 0;
3208 }
3209
3210 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3211 {
3212 __be32 *p;
3213 int ret = 0;
3214
3215 *type = 0;
3216 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3217 return -EIO;
3218 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3219 p = xdr_inline_decode(xdr, 4);
3220 if (unlikely(!p))
3221 goto out_overflow;
3222 *type = be32_to_cpup(p);
3223 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3224 dprintk("%s: bad type %d\n", __func__, *type);
3225 return -EIO;
3226 }
3227 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3228 ret = NFS_ATTR_FATTR_TYPE;
3229 }
3230 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3231 return ret;
3232 out_overflow:
3233 print_overflow_msg(__func__, xdr);
3234 return -EIO;
3235 }
3236
3237 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3238 uint32_t *bitmap, uint32_t *type)
3239 {
3240 __be32 *p;
3241
3242 *type = 0;
3243 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3244 return -EIO;
3245 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3246 p = xdr_inline_decode(xdr, 4);
3247 if (unlikely(!p))
3248 goto out_overflow;
3249 *type = be32_to_cpup(p);
3250 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3251 }
3252 dprintk("%s: expire type=0x%x\n", __func__, *type);
3253 return 0;
3254 out_overflow:
3255 print_overflow_msg(__func__, xdr);
3256 return -EIO;
3257 }
3258
3259 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3260 {
3261 __be32 *p;
3262 int ret = 0;
3263
3264 *change = 0;
3265 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3266 return -EIO;
3267 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3268 p = xdr_inline_decode(xdr, 8);
3269 if (unlikely(!p))
3270 goto out_overflow;
3271 xdr_decode_hyper(p, change);
3272 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3273 ret = NFS_ATTR_FATTR_CHANGE;
3274 }
3275 dprintk("%s: change attribute=%Lu\n", __func__,
3276 (unsigned long long)*change);
3277 return ret;
3278 out_overflow:
3279 print_overflow_msg(__func__, xdr);
3280 return -EIO;
3281 }
3282
3283 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3284 {
3285 __be32 *p;
3286 int ret = 0;
3287
3288 *size = 0;
3289 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3290 return -EIO;
3291 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3292 p = xdr_inline_decode(xdr, 8);
3293 if (unlikely(!p))
3294 goto out_overflow;
3295 xdr_decode_hyper(p, size);
3296 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3297 ret = NFS_ATTR_FATTR_SIZE;
3298 }
3299 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3300 return ret;
3301 out_overflow:
3302 print_overflow_msg(__func__, xdr);
3303 return -EIO;
3304 }
3305
3306 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3307 {
3308 __be32 *p;
3309
3310 *res = 0;
3311 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3312 return -EIO;
3313 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3314 p = xdr_inline_decode(xdr, 4);
3315 if (unlikely(!p))
3316 goto out_overflow;
3317 *res = be32_to_cpup(p);
3318 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3319 }
3320 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3321 return 0;
3322 out_overflow:
3323 print_overflow_msg(__func__, xdr);
3324 return -EIO;
3325 }
3326
3327 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3328 {
3329 __be32 *p;
3330
3331 *res = 0;
3332 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3333 return -EIO;
3334 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3335 p = xdr_inline_decode(xdr, 4);
3336 if (unlikely(!p))
3337 goto out_overflow;
3338 *res = be32_to_cpup(p);
3339 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3340 }
3341 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3342 return 0;
3343 out_overflow:
3344 print_overflow_msg(__func__, xdr);
3345 return -EIO;
3346 }
3347
3348 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3349 {
3350 __be32 *p;
3351 int ret = 0;
3352
3353 fsid->major = 0;
3354 fsid->minor = 0;
3355 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3356 return -EIO;
3357 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3358 p = xdr_inline_decode(xdr, 16);
3359 if (unlikely(!p))
3360 goto out_overflow;
3361 p = xdr_decode_hyper(p, &fsid->major);
3362 xdr_decode_hyper(p, &fsid->minor);
3363 bitmap[0] &= ~FATTR4_WORD0_FSID;
3364 ret = NFS_ATTR_FATTR_FSID;
3365 }
3366 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3367 (unsigned long long)fsid->major,
3368 (unsigned long long)fsid->minor);
3369 return ret;
3370 out_overflow:
3371 print_overflow_msg(__func__, xdr);
3372 return -EIO;
3373 }
3374
3375 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3376 {
3377 __be32 *p;
3378
3379 *res = 60;
3380 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3381 return -EIO;
3382 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3383 p = xdr_inline_decode(xdr, 4);
3384 if (unlikely(!p))
3385 goto out_overflow;
3386 *res = be32_to_cpup(p);
3387 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3388 }
3389 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3390 return 0;
3391 out_overflow:
3392 print_overflow_msg(__func__, xdr);
3393 return -EIO;
3394 }
3395
3396 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3397 {
3398 __be32 *p;
3399
3400 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3401 return -EIO;
3402 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3403 p = xdr_inline_decode(xdr, 4);
3404 if (unlikely(!p))
3405 goto out_overflow;
3406 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3407 *res = -be32_to_cpup(p);
3408 }
3409 return 0;
3410 out_overflow:
3411 print_overflow_msg(__func__, xdr);
3412 return -EIO;
3413 }
3414
3415 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3416 {
3417 __be32 *p;
3418 int len;
3419
3420 if (fh != NULL)
3421 memset(fh, 0, sizeof(*fh));
3422
3423 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3424 return -EIO;
3425 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3426 p = xdr_inline_decode(xdr, 4);
3427 if (unlikely(!p))
3428 goto out_overflow;
3429 len = be32_to_cpup(p);
3430 if (len > NFS4_FHSIZE)
3431 return -EIO;
3432 p = xdr_inline_decode(xdr, len);
3433 if (unlikely(!p))
3434 goto out_overflow;
3435 if (fh != NULL) {
3436 memcpy(fh->data, p, len);
3437 fh->size = len;
3438 }
3439 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3440 }
3441 return 0;
3442 out_overflow:
3443 print_overflow_msg(__func__, xdr);
3444 return -EIO;
3445 }
3446
3447 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3448 {
3449 __be32 *p;
3450
3451 *res = 0;
3452 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3453 return -EIO;
3454 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3455 p = xdr_inline_decode(xdr, 4);
3456 if (unlikely(!p))
3457 goto out_overflow;
3458 *res = be32_to_cpup(p);
3459 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3460 }
3461 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3462 return 0;
3463 out_overflow:
3464 print_overflow_msg(__func__, xdr);
3465 return -EIO;
3466 }
3467
3468 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3469 {
3470 __be32 *p;
3471 int ret = 0;
3472
3473 *fileid = 0;
3474 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3475 return -EIO;
3476 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3477 p = xdr_inline_decode(xdr, 8);
3478 if (unlikely(!p))
3479 goto out_overflow;
3480 xdr_decode_hyper(p, fileid);
3481 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3482 ret = NFS_ATTR_FATTR_FILEID;
3483 }
3484 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3485 return ret;
3486 out_overflow:
3487 print_overflow_msg(__func__, xdr);
3488 return -EIO;
3489 }
3490
3491 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3492 {
3493 __be32 *p;
3494 int ret = 0;
3495
3496 *fileid = 0;
3497 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3498 return -EIO;
3499 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3500 p = xdr_inline_decode(xdr, 8);
3501 if (unlikely(!p))
3502 goto out_overflow;
3503 xdr_decode_hyper(p, fileid);
3504 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3505 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3506 }
3507 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3508 return ret;
3509 out_overflow:
3510 print_overflow_msg(__func__, xdr);
3511 return -EIO;
3512 }
3513
3514 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3515 {
3516 __be32 *p;
3517 int status = 0;
3518
3519 *res = 0;
3520 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3521 return -EIO;
3522 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3523 p = xdr_inline_decode(xdr, 8);
3524 if (unlikely(!p))
3525 goto out_overflow;
3526 xdr_decode_hyper(p, res);
3527 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3528 }
3529 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3530 return status;
3531 out_overflow:
3532 print_overflow_msg(__func__, xdr);
3533 return -EIO;
3534 }
3535
3536 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3537 {
3538 __be32 *p;
3539 int status = 0;
3540
3541 *res = 0;
3542 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3543 return -EIO;
3544 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3545 p = xdr_inline_decode(xdr, 8);
3546 if (unlikely(!p))
3547 goto out_overflow;
3548 xdr_decode_hyper(p, res);
3549 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3550 }
3551 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3552 return status;
3553 out_overflow:
3554 print_overflow_msg(__func__, xdr);
3555 return -EIO;
3556 }
3557
3558 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3559 {
3560 __be32 *p;
3561 int status = 0;
3562
3563 *res = 0;
3564 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3565 return -EIO;
3566 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3567 p = xdr_inline_decode(xdr, 8);
3568 if (unlikely(!p))
3569 goto out_overflow;
3570 xdr_decode_hyper(p, res);
3571 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3572 }
3573 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3574 return status;
3575 out_overflow:
3576 print_overflow_msg(__func__, xdr);
3577 return -EIO;
3578 }
3579
3580 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3581 {
3582 u32 n;
3583 __be32 *p;
3584 int status = 0;
3585
3586 p = xdr_inline_decode(xdr, 4);
3587 if (unlikely(!p))
3588 goto out_overflow;
3589 n = be32_to_cpup(p);
3590 if (n == 0)
3591 goto root_path;
3592 dprintk("pathname4: ");
3593 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3594 dprintk("cannot parse %d components in path\n", n);
3595 goto out_eio;
3596 }
3597 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3598 struct nfs4_string *component = &path->components[path->ncomponents];
3599 status = decode_opaque_inline(xdr, &component->len, &component->data);
3600 if (unlikely(status != 0))
3601 goto out_eio;
3602 ifdebug (XDR)
3603 pr_cont("%s%.*s ",
3604 (path->ncomponents != n ? "/ " : ""),
3605 component->len, component->data);
3606 }
3607 out:
3608 return status;
3609 root_path:
3610 /* a root pathname is sent as a zero component4 */
3611 path->ncomponents = 1;
3612 path->components[0].len=0;
3613 path->components[0].data=NULL;
3614 dprintk("pathname4: /\n");
3615 goto out;
3616 out_eio:
3617 dprintk(" status %d", status);
3618 status = -EIO;
3619 goto out;
3620 out_overflow:
3621 print_overflow_msg(__func__, xdr);
3622 return -EIO;
3623 }
3624
3625 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3626 {
3627 int n;
3628 __be32 *p;
3629 int status = -EIO;
3630
3631 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3632 goto out;
3633 status = 0;
3634 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3635 goto out;
3636 status = -EIO;
3637 /* Ignore borken servers that return unrequested attrs */
3638 if (unlikely(res == NULL))
3639 goto out;
3640 dprintk("%s: fsroot:\n", __func__);
3641 status = decode_pathname(xdr, &res->fs_path);
3642 if (unlikely(status != 0))
3643 goto out;
3644 p = xdr_inline_decode(xdr, 4);
3645 if (unlikely(!p))
3646 goto out_overflow;
3647 n = be32_to_cpup(p);
3648 if (n <= 0)
3649 goto out_eio;
3650 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3651 u32 m;
3652 struct nfs4_fs_location *loc;
3653
3654 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3655 break;
3656 loc = &res->locations[res->nlocations];
3657 p = xdr_inline_decode(xdr, 4);
3658 if (unlikely(!p))
3659 goto out_overflow;
3660 m = be32_to_cpup(p);
3661
3662 dprintk("%s: servers:\n", __func__);
3663 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3664 struct nfs4_string *server;
3665
3666 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3667 unsigned int i;
3668 dprintk("%s: using first %u of %u servers "
3669 "returned for location %u\n",
3670 __func__,
3671 NFS4_FS_LOCATION_MAXSERVERS,
3672 m, res->nlocations);
3673 for (i = loc->nservers; i < m; i++) {
3674 unsigned int len;
3675 char *data;
3676 status = decode_opaque_inline(xdr, &len, &data);
3677 if (unlikely(status != 0))
3678 goto out_eio;
3679 }
3680 break;
3681 }
3682 server = &loc->servers[loc->nservers];
3683 status = decode_opaque_inline(xdr, &server->len, &server->data);
3684 if (unlikely(status != 0))
3685 goto out_eio;
3686 dprintk("%s ", server->data);
3687 }
3688 status = decode_pathname(xdr, &loc->rootpath);
3689 if (unlikely(status != 0))
3690 goto out_eio;
3691 }
3692 if (res->nlocations != 0)
3693 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3694 out:
3695 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3696 return status;
3697 out_overflow:
3698 print_overflow_msg(__func__, xdr);
3699 out_eio:
3700 status = -EIO;
3701 goto out;
3702 }
3703
3704 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3705 {
3706 __be32 *p;
3707 int status = 0;
3708
3709 *res = 0;
3710 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3711 return -EIO;
3712 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3713 p = xdr_inline_decode(xdr, 8);
3714 if (unlikely(!p))
3715 goto out_overflow;
3716 xdr_decode_hyper(p, res);
3717 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3718 }
3719 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3720 return status;
3721 out_overflow:
3722 print_overflow_msg(__func__, xdr);
3723 return -EIO;
3724 }
3725
3726 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3727 {
3728 __be32 *p;
3729 int status = 0;
3730
3731 *maxlink = 1;
3732 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3733 return -EIO;
3734 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3735 p = xdr_inline_decode(xdr, 4);
3736 if (unlikely(!p))
3737 goto out_overflow;
3738 *maxlink = be32_to_cpup(p);
3739 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3740 }
3741 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3742 return status;
3743 out_overflow:
3744 print_overflow_msg(__func__, xdr);
3745 return -EIO;
3746 }
3747
3748 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3749 {
3750 __be32 *p;
3751 int status = 0;
3752
3753 *maxname = 1024;
3754 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3755 return -EIO;
3756 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3757 p = xdr_inline_decode(xdr, 4);
3758 if (unlikely(!p))
3759 goto out_overflow;
3760 *maxname = be32_to_cpup(p);
3761 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3762 }
3763 dprintk("%s: maxname=%u\n", __func__, *maxname);
3764 return status;
3765 out_overflow:
3766 print_overflow_msg(__func__, xdr);
3767 return -EIO;
3768 }
3769
3770 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3771 {
3772 __be32 *p;
3773 int status = 0;
3774
3775 *res = 1024;
3776 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3777 return -EIO;
3778 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3779 uint64_t maxread;
3780 p = xdr_inline_decode(xdr, 8);
3781 if (unlikely(!p))
3782 goto out_overflow;
3783 xdr_decode_hyper(p, &maxread);
3784 if (maxread > 0x7FFFFFFF)
3785 maxread = 0x7FFFFFFF;
3786 *res = (uint32_t)maxread;
3787 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3788 }
3789 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3790 return status;
3791 out_overflow:
3792 print_overflow_msg(__func__, xdr);
3793 return -EIO;
3794 }
3795
3796 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3797 {
3798 __be32 *p;
3799 int status = 0;
3800
3801 *res = 1024;
3802 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3803 return -EIO;
3804 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3805 uint64_t maxwrite;
3806 p = xdr_inline_decode(xdr, 8);
3807 if (unlikely(!p))
3808 goto out_overflow;
3809 xdr_decode_hyper(p, &maxwrite);
3810 if (maxwrite > 0x7FFFFFFF)
3811 maxwrite = 0x7FFFFFFF;
3812 *res = (uint32_t)maxwrite;
3813 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3814 }
3815 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3816 return status;
3817 out_overflow:
3818 print_overflow_msg(__func__, xdr);
3819 return -EIO;
3820 }
3821
3822 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3823 {
3824 uint32_t tmp;
3825 __be32 *p;
3826 int ret = 0;
3827
3828 *mode = 0;
3829 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3830 return -EIO;
3831 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3832 p = xdr_inline_decode(xdr, 4);
3833 if (unlikely(!p))
3834 goto out_overflow;
3835 tmp = be32_to_cpup(p);
3836 *mode = tmp & ~S_IFMT;
3837 bitmap[1] &= ~FATTR4_WORD1_MODE;
3838 ret = NFS_ATTR_FATTR_MODE;
3839 }
3840 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3841 return ret;
3842 out_overflow:
3843 print_overflow_msg(__func__, xdr);
3844 return -EIO;
3845 }
3846
3847 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3848 {
3849 __be32 *p;
3850 int ret = 0;
3851
3852 *nlink = 1;
3853 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3854 return -EIO;
3855 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3856 p = xdr_inline_decode(xdr, 4);
3857 if (unlikely(!p))
3858 goto out_overflow;
3859 *nlink = be32_to_cpup(p);
3860 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3861 ret = NFS_ATTR_FATTR_NLINK;
3862 }
3863 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3864 return ret;
3865 out_overflow:
3866 print_overflow_msg(__func__, xdr);
3867 return -EIO;
3868 }
3869
3870 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3871 const struct nfs_server *server, kuid_t *uid,
3872 struct nfs4_string *owner_name)
3873 {
3874 uint32_t len;
3875 __be32 *p;
3876 int ret = 0;
3877
3878 *uid = make_kuid(&init_user_ns, -2);
3879 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3880 return -EIO;
3881 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3882 p = xdr_inline_decode(xdr, 4);
3883 if (unlikely(!p))
3884 goto out_overflow;
3885 len = be32_to_cpup(p);
3886 p = xdr_inline_decode(xdr, len);
3887 if (unlikely(!p))
3888 goto out_overflow;
3889 if (owner_name != NULL) {
3890 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3891 if (owner_name->data != NULL) {
3892 owner_name->len = len;
3893 ret = NFS_ATTR_FATTR_OWNER_NAME;
3894 }
3895 } else if (len < XDR_MAX_NETOBJ) {
3896 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3897 ret = NFS_ATTR_FATTR_OWNER;
3898 else
3899 dprintk("%s: nfs_map_name_to_uid failed!\n",
3900 __func__);
3901 } else
3902 dprintk("%s: name too long (%u)!\n",
3903 __func__, len);
3904 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3905 }
3906 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3907 return ret;
3908 out_overflow:
3909 print_overflow_msg(__func__, xdr);
3910 return -EIO;
3911 }
3912
3913 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3914 const struct nfs_server *server, kgid_t *gid,
3915 struct nfs4_string *group_name)
3916 {
3917 uint32_t len;
3918 __be32 *p;
3919 int ret = 0;
3920
3921 *gid = make_kgid(&init_user_ns, -2);
3922 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3923 return -EIO;
3924 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3925 p = xdr_inline_decode(xdr, 4);
3926 if (unlikely(!p))
3927 goto out_overflow;
3928 len = be32_to_cpup(p);
3929 p = xdr_inline_decode(xdr, len);
3930 if (unlikely(!p))
3931 goto out_overflow;
3932 if (group_name != NULL) {
3933 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3934 if (group_name->data != NULL) {
3935 group_name->len = len;
3936 ret = NFS_ATTR_FATTR_GROUP_NAME;
3937 }
3938 } else if (len < XDR_MAX_NETOBJ) {
3939 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3940 ret = NFS_ATTR_FATTR_GROUP;
3941 else
3942 dprintk("%s: nfs_map_group_to_gid failed!\n",
3943 __func__);
3944 } else
3945 dprintk("%s: name too long (%u)!\n",
3946 __func__, len);
3947 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3948 }
3949 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3950 return ret;
3951 out_overflow:
3952 print_overflow_msg(__func__, xdr);
3953 return -EIO;
3954 }
3955
3956 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3957 {
3958 uint32_t major = 0, minor = 0;
3959 __be32 *p;
3960 int ret = 0;
3961
3962 *rdev = MKDEV(0,0);
3963 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3964 return -EIO;
3965 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3966 dev_t tmp;
3967
3968 p = xdr_inline_decode(xdr, 8);
3969 if (unlikely(!p))
3970 goto out_overflow;
3971 major = be32_to_cpup(p++);
3972 minor = be32_to_cpup(p);
3973 tmp = MKDEV(major, minor);
3974 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3975 *rdev = tmp;
3976 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3977 ret = NFS_ATTR_FATTR_RDEV;
3978 }
3979 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3980 return ret;
3981 out_overflow:
3982 print_overflow_msg(__func__, xdr);
3983 return -EIO;
3984 }
3985
3986 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3987 {
3988 __be32 *p;
3989 int status = 0;
3990
3991 *res = 0;
3992 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3993 return -EIO;
3994 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3995 p = xdr_inline_decode(xdr, 8);
3996 if (unlikely(!p))
3997 goto out_overflow;
3998 xdr_decode_hyper(p, res);
3999 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4000 }
4001 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4002 return status;
4003 out_overflow:
4004 print_overflow_msg(__func__, xdr);
4005 return -EIO;
4006 }
4007
4008 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009 {
4010 __be32 *p;
4011 int status = 0;
4012
4013 *res = 0;
4014 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4015 return -EIO;
4016 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4017 p = xdr_inline_decode(xdr, 8);
4018 if (unlikely(!p))
4019 goto out_overflow;
4020 xdr_decode_hyper(p, res);
4021 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4022 }
4023 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4024 return status;
4025 out_overflow:
4026 print_overflow_msg(__func__, xdr);
4027 return -EIO;
4028 }
4029
4030 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031 {
4032 __be32 *p;
4033 int status = 0;
4034
4035 *res = 0;
4036 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4037 return -EIO;
4038 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4039 p = xdr_inline_decode(xdr, 8);
4040 if (unlikely(!p))
4041 goto out_overflow;
4042 xdr_decode_hyper(p, res);
4043 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4044 }
4045 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4046 return status;
4047 out_overflow:
4048 print_overflow_msg(__func__, xdr);
4049 return -EIO;
4050 }
4051
4052 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4053 {
4054 __be32 *p;
4055 int ret = 0;
4056
4057 *used = 0;
4058 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4059 return -EIO;
4060 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4061 p = xdr_inline_decode(xdr, 8);
4062 if (unlikely(!p))
4063 goto out_overflow;
4064 xdr_decode_hyper(p, used);
4065 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4066 ret = NFS_ATTR_FATTR_SPACE_USED;
4067 }
4068 dprintk("%s: space used=%Lu\n", __func__,
4069 (unsigned long long)*used);
4070 return ret;
4071 out_overflow:
4072 print_overflow_msg(__func__, xdr);
4073 return -EIO;
4074 }
4075
4076 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4077 {
4078 __be32 *p;
4079 uint64_t sec;
4080 uint32_t nsec;
4081
4082 p = xdr_inline_decode(xdr, 12);
4083 if (unlikely(!p))
4084 goto out_overflow;
4085 p = xdr_decode_hyper(p, &sec);
4086 nsec = be32_to_cpup(p);
4087 time->tv_sec = (time_t)sec;
4088 time->tv_nsec = (long)nsec;
4089 return 0;
4090 out_overflow:
4091 print_overflow_msg(__func__, xdr);
4092 return -EIO;
4093 }
4094
4095 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4096 {
4097 int status = 0;
4098
4099 time->tv_sec = 0;
4100 time->tv_nsec = 0;
4101 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4102 return -EIO;
4103 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4104 status = decode_attr_time(xdr, time);
4105 if (status == 0)
4106 status = NFS_ATTR_FATTR_ATIME;
4107 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4108 }
4109 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4110 return status;
4111 }
4112
4113 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4114 {
4115 int status = 0;
4116
4117 time->tv_sec = 0;
4118 time->tv_nsec = 0;
4119 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4120 return -EIO;
4121 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4122 status = decode_attr_time(xdr, time);
4123 if (status == 0)
4124 status = NFS_ATTR_FATTR_CTIME;
4125 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4126 }
4127 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4128 return status;
4129 }
4130
4131 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4132 struct timespec *time)
4133 {
4134 int status = 0;
4135
4136 time->tv_sec = 0;
4137 time->tv_nsec = 0;
4138 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4139 return -EIO;
4140 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4141 status = decode_attr_time(xdr, time);
4142 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4143 }
4144 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4145 (long)time->tv_nsec);
4146 return status;
4147 }
4148
4149 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4150 struct nfs4_label *label)
4151 {
4152 uint32_t pi = 0;
4153 uint32_t lfs = 0;
4154 __u32 len;
4155 __be32 *p;
4156 int status = 0;
4157
4158 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4159 return -EIO;
4160 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4161 p = xdr_inline_decode(xdr, 4);
4162 if (unlikely(!p))
4163 goto out_overflow;
4164 lfs = be32_to_cpup(p++);
4165 p = xdr_inline_decode(xdr, 4);
4166 if (unlikely(!p))
4167 goto out_overflow;
4168 pi = be32_to_cpup(p++);
4169 p = xdr_inline_decode(xdr, 4);
4170 if (unlikely(!p))
4171 goto out_overflow;
4172 len = be32_to_cpup(p++);
4173 p = xdr_inline_decode(xdr, len);
4174 if (unlikely(!p))
4175 goto out_overflow;
4176 if (len < NFS4_MAXLABELLEN) {
4177 if (label) {
4178 memcpy(label->label, p, len);
4179 label->len = len;
4180 label->pi = pi;
4181 label->lfs = lfs;
4182 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4183 }
4184 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4185 } else
4186 printk(KERN_WARNING "%s: label too long (%u)!\n",
4187 __func__, len);
4188 }
4189 if (label && label->label)
4190 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4191 (char *)label->label, label->len, label->pi, label->lfs);
4192 return status;
4193
4194 out_overflow:
4195 print_overflow_msg(__func__, xdr);
4196 return -EIO;
4197 }
4198
4199 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4200 {
4201 int status = 0;
4202
4203 time->tv_sec = 0;
4204 time->tv_nsec = 0;
4205 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4206 return -EIO;
4207 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4208 status = decode_attr_time(xdr, time);
4209 if (status == 0)
4210 status = NFS_ATTR_FATTR_MTIME;
4211 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4212 }
4213 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4214 return status;
4215 }
4216
4217 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4218 {
4219 unsigned int attrwords = XDR_QUADLEN(attrlen);
4220 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4221
4222 if (unlikely(attrwords != nwords)) {
4223 dprintk("%s: server returned incorrect attribute length: "
4224 "%u %c %u\n",
4225 __func__,
4226 attrwords << 2,
4227 (attrwords < nwords) ? '<' : '>',
4228 nwords << 2);
4229 return -EIO;
4230 }
4231 return 0;
4232 }
4233
4234 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4235 {
4236 __be32 *p;
4237
4238 p = xdr_inline_decode(xdr, 20);
4239 if (unlikely(!p))
4240 goto out_overflow;
4241 cinfo->atomic = be32_to_cpup(p++);
4242 p = xdr_decode_hyper(p, &cinfo->before);
4243 xdr_decode_hyper(p, &cinfo->after);
4244 return 0;
4245 out_overflow:
4246 print_overflow_msg(__func__, xdr);
4247 return -EIO;
4248 }
4249
4250 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4251 {
4252 __be32 *p;
4253 uint32_t supp, acc;
4254 int status;
4255
4256 status = decode_op_hdr(xdr, OP_ACCESS);
4257 if (status)
4258 return status;
4259 p = xdr_inline_decode(xdr, 8);
4260 if (unlikely(!p))
4261 goto out_overflow;
4262 supp = be32_to_cpup(p++);
4263 acc = be32_to_cpup(p);
4264 *supported = supp;
4265 *access = acc;
4266 return 0;
4267 out_overflow:
4268 print_overflow_msg(__func__, xdr);
4269 return -EIO;
4270 }
4271
4272 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4273 {
4274 __be32 *p;
4275
4276 p = xdr_inline_decode(xdr, len);
4277 if (likely(p)) {
4278 memcpy(buf, p, len);
4279 return 0;
4280 }
4281 print_overflow_msg(__func__, xdr);
4282 return -EIO;
4283 }
4284
4285 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4286 {
4287 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4288 }
4289
4290 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4291 {
4292 int status;
4293
4294 status = decode_op_hdr(xdr, OP_CLOSE);
4295 if (status != -EIO)
4296 nfs_increment_open_seqid(status, res->seqid);
4297 if (!status)
4298 status = decode_stateid(xdr, &res->stateid);
4299 return status;
4300 }
4301
4302 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4303 {
4304 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4305 }
4306
4307 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4308 {
4309 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4310 }
4311
4312 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4313 {
4314 int status;
4315
4316 status = decode_op_hdr(xdr, OP_COMMIT);
4317 if (!status)
4318 status = decode_write_verifier(xdr, &res->verf->verifier);
4319 return status;
4320 }
4321
4322 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4323 {
4324 __be32 *p;
4325 uint32_t bmlen;
4326 int status;
4327
4328 status = decode_op_hdr(xdr, OP_CREATE);
4329 if (status)
4330 return status;
4331 if ((status = decode_change_info(xdr, cinfo)))
4332 return status;
4333 p = xdr_inline_decode(xdr, 4);
4334 if (unlikely(!p))
4335 goto out_overflow;
4336 bmlen = be32_to_cpup(p);
4337 p = xdr_inline_decode(xdr, bmlen << 2);
4338 if (likely(p))
4339 return 0;
4340 out_overflow:
4341 print_overflow_msg(__func__, xdr);
4342 return -EIO;
4343 }
4344
4345 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4346 {
4347 unsigned int savep;
4348 uint32_t attrlen, bitmap[3] = {0};
4349 int status;
4350
4351 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4352 goto xdr_error;
4353 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4354 goto xdr_error;
4355 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4356 goto xdr_error;
4357 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4360 &res->fh_expire_type)) != 0)
4361 goto xdr_error;
4362 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4363 goto xdr_error;
4364 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4365 goto xdr_error;
4366 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4367 goto xdr_error;
4368 status = verify_attr_len(xdr, savep, attrlen);
4369 xdr_error:
4370 dprintk("%s: xdr returned %d!\n", __func__, -status);
4371 return status;
4372 }
4373
4374 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4375 {
4376 unsigned int savep;
4377 uint32_t attrlen, bitmap[3] = {0};
4378 int status;
4379
4380 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4381 goto xdr_error;
4382 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4385 goto xdr_error;
4386
4387 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4388 goto xdr_error;
4389 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4398 goto xdr_error;
4399
4400 status = verify_attr_len(xdr, savep, attrlen);
4401 xdr_error:
4402 dprintk("%s: xdr returned %d!\n", __func__, -status);
4403 return status;
4404 }
4405
4406 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4407 {
4408 unsigned int savep;
4409 uint32_t attrlen, bitmap[3] = {0};
4410 int status;
4411
4412 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4413 goto xdr_error;
4414 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4415 goto xdr_error;
4416 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4417 goto xdr_error;
4418
4419 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4420 goto xdr_error;
4421 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4422 goto xdr_error;
4423
4424 status = verify_attr_len(xdr, savep, attrlen);
4425 xdr_error:
4426 dprintk("%s: xdr returned %d!\n", __func__, -status);
4427 return status;
4428 }
4429
4430 static int decode_threshold_hint(struct xdr_stream *xdr,
4431 uint32_t *bitmap,
4432 uint64_t *res,
4433 uint32_t hint_bit)
4434 {
4435 __be32 *p;
4436
4437 *res = 0;
4438 if (likely(bitmap[0] & hint_bit)) {
4439 p = xdr_inline_decode(xdr, 8);
4440 if (unlikely(!p))
4441 goto out_overflow;
4442 xdr_decode_hyper(p, res);
4443 }
4444 return 0;
4445 out_overflow:
4446 print_overflow_msg(__func__, xdr);
4447 return -EIO;
4448 }
4449
4450 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4451 struct nfs4_threshold *res)
4452 {
4453 __be32 *p;
4454 unsigned int savep;
4455 uint32_t bitmap[3] = {0,}, attrlen;
4456 int status;
4457
4458 /* layout type */
4459 p = xdr_inline_decode(xdr, 4);
4460 if (unlikely(!p)) {
4461 print_overflow_msg(__func__, xdr);
4462 return -EIO;
4463 }
4464 res->l_type = be32_to_cpup(p);
4465
4466 /* thi_hintset bitmap */
4467 status = decode_attr_bitmap(xdr, bitmap);
4468 if (status < 0)
4469 goto xdr_error;
4470
4471 /* thi_hintlist length */
4472 status = decode_attr_length(xdr, &attrlen, &savep);
4473 if (status < 0)
4474 goto xdr_error;
4475 /* thi_hintlist */
4476 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4477 if (status < 0)
4478 goto xdr_error;
4479 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4480 if (status < 0)
4481 goto xdr_error;
4482 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4483 THRESHOLD_RD_IO);
4484 if (status < 0)
4485 goto xdr_error;
4486 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4487 THRESHOLD_WR_IO);
4488 if (status < 0)
4489 goto xdr_error;
4490
4491 status = verify_attr_len(xdr, savep, attrlen);
4492 res->bm = bitmap[0];
4493
4494 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4495 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4496 res->wr_io_sz);
4497 xdr_error:
4498 dprintk("%s ret=%d!\n", __func__, status);
4499 return status;
4500 }
4501
4502 /*
4503 * Thresholds on pNFS direct I/O vrs MDS I/O
4504 */
4505 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4506 uint32_t *bitmap,
4507 struct nfs4_threshold *res)
4508 {
4509 __be32 *p;
4510 int status = 0;
4511 uint32_t num;
4512
4513 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4514 return -EIO;
4515 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4516 /* Did the server return an unrequested attribute? */
4517 if (unlikely(res == NULL))
4518 return -EREMOTEIO;
4519 p = xdr_inline_decode(xdr, 4);
4520 if (unlikely(!p))
4521 goto out_overflow;
4522 num = be32_to_cpup(p);
4523 if (num == 0)
4524 return 0;
4525 if (num > 1)
4526 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4527 "drivers per filesystem not supported\n",
4528 __func__);
4529
4530 status = decode_first_threshold_item4(xdr, res);
4531 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4532 }
4533 return status;
4534 out_overflow:
4535 print_overflow_msg(__func__, xdr);
4536 return -EIO;
4537 }
4538
4539 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4540 struct nfs_fattr *fattr, struct nfs_fh *fh,
4541 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4542 const struct nfs_server *server)
4543 {
4544 int status;
4545 umode_t fmode = 0;
4546 uint32_t type;
4547 int32_t err;
4548
4549 status = decode_attr_type(xdr, bitmap, &type);
4550 if (status < 0)
4551 goto xdr_error;
4552 fattr->mode = 0;
4553 if (status != 0) {
4554 fattr->mode |= nfs_type2fmt[type];
4555 fattr->valid |= status;
4556 }
4557
4558 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4559 if (status < 0)
4560 goto xdr_error;
4561 fattr->valid |= status;
4562
4563 status = decode_attr_size(xdr, bitmap, &fattr->size);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->valid |= status;
4567
4568 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4569 if (status < 0)
4570 goto xdr_error;
4571 fattr->valid |= status;
4572
4573 err = 0;
4574 status = decode_attr_error(xdr, bitmap, &err);
4575 if (status < 0)
4576 goto xdr_error;
4577
4578 status = decode_attr_filehandle(xdr, bitmap, fh);
4579 if (status < 0)
4580 goto xdr_error;
4581
4582 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4583 if (status < 0)
4584 goto xdr_error;
4585 fattr->valid |= status;
4586
4587 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4588 if (status < 0)
4589 goto xdr_error;
4590 fattr->valid |= status;
4591
4592 status = decode_attr_mode(xdr, bitmap, &fmode);
4593 if (status < 0)
4594 goto xdr_error;
4595 if (status != 0) {
4596 fattr->mode |= fmode;
4597 fattr->valid |= status;
4598 }
4599
4600 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4601 if (status < 0)
4602 goto xdr_error;
4603 fattr->valid |= status;
4604
4605 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4606 if (status < 0)
4607 goto xdr_error;
4608 fattr->valid |= status;
4609
4610 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4611 if (status < 0)
4612 goto xdr_error;
4613 fattr->valid |= status;
4614
4615 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4616 if (status < 0)
4617 goto xdr_error;
4618 fattr->valid |= status;
4619
4620 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4621 if (status < 0)
4622 goto xdr_error;
4623 fattr->valid |= status;
4624
4625 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4626 if (status < 0)
4627 goto xdr_error;
4628 fattr->valid |= status;
4629
4630 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4631 if (status < 0)
4632 goto xdr_error;
4633 fattr->valid |= status;
4634
4635 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4636 if (status < 0)
4637 goto xdr_error;
4638 fattr->valid |= status;
4639
4640 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4641 if (status < 0)
4642 goto xdr_error;
4643 fattr->valid |= status;
4644
4645 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4646 if (status < 0)
4647 goto xdr_error;
4648
4649 if (label) {
4650 status = decode_attr_security_label(xdr, bitmap, label);
4651 if (status < 0)
4652 goto xdr_error;
4653 fattr->valid |= status;
4654 }
4655
4656 xdr_error:
4657 dprintk("%s: xdr returned %d\n", __func__, -status);
4658 return status;
4659 }
4660
4661 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4662 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4663 struct nfs4_label *label, const struct nfs_server *server)
4664 {
4665 unsigned int savep;
4666 uint32_t attrlen,
4667 bitmap[3] = {0};
4668 int status;
4669
4670 status = decode_op_hdr(xdr, OP_GETATTR);
4671 if (status < 0)
4672 goto xdr_error;
4673
4674 status = decode_attr_bitmap(xdr, bitmap);
4675 if (status < 0)
4676 goto xdr_error;
4677
4678 status = decode_attr_length(xdr, &attrlen, &savep);
4679 if (status < 0)
4680 goto xdr_error;
4681
4682 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4683 label, server);
4684 if (status < 0)
4685 goto xdr_error;
4686
4687 status = verify_attr_len(xdr, savep, attrlen);
4688 xdr_error:
4689 dprintk("%s: xdr returned %d\n", __func__, -status);
4690 return status;
4691 }
4692
4693 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4694 struct nfs4_label *label, const struct nfs_server *server)
4695 {
4696 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4697 }
4698
4699 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4700 const struct nfs_server *server)
4701 {
4702 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4703 }
4704
4705 /*
4706 * Decode potentially multiple layout types. Currently we only support
4707 * one layout driver per file system.
4708 */
4709 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4710 uint32_t *layouttype)
4711 {
4712 __be32 *p;
4713 int num;
4714
4715 p = xdr_inline_decode(xdr, 4);
4716 if (unlikely(!p))
4717 goto out_overflow;
4718 num = be32_to_cpup(p);
4719
4720 /* pNFS is not supported by the underlying file system */
4721 if (num == 0) {
4722 *layouttype = 0;
4723 return 0;
4724 }
4725 if (num > 1)
4726 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4727 "drivers per filesystem not supported\n", __func__);
4728
4729 /* Decode and set first layout type, move xdr->p past unused types */
4730 p = xdr_inline_decode(xdr, num * 4);
4731 if (unlikely(!p))
4732 goto out_overflow;
4733 *layouttype = be32_to_cpup(p);
4734 return 0;
4735 out_overflow:
4736 print_overflow_msg(__func__, xdr);
4737 return -EIO;
4738 }
4739
4740 /*
4741 * The type of file system exported.
4742 * Note we must ensure that layouttype is set in any non-error case.
4743 */
4744 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4745 uint32_t *layouttype)
4746 {
4747 int status = 0;
4748
4749 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4750 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4751 return -EIO;
4752 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4753 status = decode_first_pnfs_layout_type(xdr, layouttype);
4754 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4755 } else
4756 *layouttype = 0;
4757 return status;
4758 }
4759
4760 /*
4761 * The prefered block size for layout directed io
4762 */
4763 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4764 uint32_t *res)
4765 {
4766 __be32 *p;
4767
4768 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4769 *res = 0;
4770 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4771 p = xdr_inline_decode(xdr, 4);
4772 if (unlikely(!p)) {
4773 print_overflow_msg(__func__, xdr);
4774 return -EIO;
4775 }
4776 *res = be32_to_cpup(p);
4777 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4778 }
4779 return 0;
4780 }
4781
4782 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4783 {
4784 unsigned int savep;
4785 uint32_t attrlen, bitmap[3];
4786 int status;
4787
4788 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4789 goto xdr_error;
4790 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4791 goto xdr_error;
4792 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4793 goto xdr_error;
4794
4795 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4796
4797 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4798 goto xdr_error;
4799 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4800 goto xdr_error;
4801 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4802 goto xdr_error;
4803 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4804 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4805 goto xdr_error;
4806 fsinfo->wtpref = fsinfo->wtmax;
4807 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4808 if (status != 0)
4809 goto xdr_error;
4810 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4811 if (status != 0)
4812 goto xdr_error;
4813 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4814 if (status)
4815 goto xdr_error;
4816
4817 status = verify_attr_len(xdr, savep, attrlen);
4818 xdr_error:
4819 dprintk("%s: xdr returned %d!\n", __func__, -status);
4820 return status;
4821 }
4822
4823 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4824 {
4825 __be32 *p;
4826 uint32_t len;
4827 int status;
4828
4829 /* Zero handle first to allow comparisons */
4830 memset(fh, 0, sizeof(*fh));
4831
4832 status = decode_op_hdr(xdr, OP_GETFH);
4833 if (status)
4834 return status;
4835
4836 p = xdr_inline_decode(xdr, 4);
4837 if (unlikely(!p))
4838 goto out_overflow;
4839 len = be32_to_cpup(p);
4840 if (len > NFS4_FHSIZE)
4841 return -EIO;
4842 fh->size = len;
4843 p = xdr_inline_decode(xdr, len);
4844 if (unlikely(!p))
4845 goto out_overflow;
4846 memcpy(fh->data, p, len);
4847 return 0;
4848 out_overflow:
4849 print_overflow_msg(__func__, xdr);
4850 return -EIO;
4851 }
4852
4853 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4854 {
4855 int status;
4856
4857 status = decode_op_hdr(xdr, OP_LINK);
4858 if (status)
4859 return status;
4860 return decode_change_info(xdr, cinfo);
4861 }
4862
4863 /*
4864 * We create the owner, so we know a proper owner.id length is 4.
4865 */
4866 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4867 {
4868 uint64_t offset, length, clientid;
4869 __be32 *p;
4870 uint32_t namelen, type;
4871
4872 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4873 if (unlikely(!p))
4874 goto out_overflow;
4875 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4876 p = xdr_decode_hyper(p, &length);
4877 type = be32_to_cpup(p++); /* 4 byte read */
4878 if (fl != NULL) { /* manipulate file lock */
4879 fl->fl_start = (loff_t)offset;
4880 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4881 if (length == ~(uint64_t)0)
4882 fl->fl_end = OFFSET_MAX;
4883 fl->fl_type = F_WRLCK;
4884 if (type & 1)
4885 fl->fl_type = F_RDLCK;
4886 fl->fl_pid = 0;
4887 }
4888 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4889 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4890 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4891 if (likely(p))
4892 return -NFS4ERR_DENIED;
4893 out_overflow:
4894 print_overflow_msg(__func__, xdr);
4895 return -EIO;
4896 }
4897
4898 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4899 {
4900 int status;
4901
4902 status = decode_op_hdr(xdr, OP_LOCK);
4903 if (status == -EIO)
4904 goto out;
4905 if (status == 0) {
4906 status = decode_stateid(xdr, &res->stateid);
4907 if (unlikely(status))
4908 goto out;
4909 } else if (status == -NFS4ERR_DENIED)
4910 status = decode_lock_denied(xdr, NULL);
4911 if (res->open_seqid != NULL)
4912 nfs_increment_open_seqid(status, res->open_seqid);
4913 nfs_increment_lock_seqid(status, res->lock_seqid);
4914 out:
4915 return status;
4916 }
4917
4918 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4919 {
4920 int status;
4921 status = decode_op_hdr(xdr, OP_LOCKT);
4922 if (status == -NFS4ERR_DENIED)
4923 return decode_lock_denied(xdr, res->denied);
4924 return status;
4925 }
4926
4927 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4928 {
4929 int status;
4930
4931 status = decode_op_hdr(xdr, OP_LOCKU);
4932 if (status != -EIO)
4933 nfs_increment_lock_seqid(status, res->seqid);
4934 if (status == 0)
4935 status = decode_stateid(xdr, &res->stateid);
4936 return status;
4937 }
4938
4939 static int decode_release_lockowner(struct xdr_stream *xdr)
4940 {
4941 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4942 }
4943
4944 static int decode_lookup(struct xdr_stream *xdr)
4945 {
4946 return decode_op_hdr(xdr, OP_LOOKUP);
4947 }
4948
4949 /* This is too sick! */
4950 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4951 {
4952 __be32 *p;
4953 uint32_t limit_type, nblocks, blocksize;
4954
4955 p = xdr_inline_decode(xdr, 12);
4956 if (unlikely(!p))
4957 goto out_overflow;
4958 limit_type = be32_to_cpup(p++);
4959 switch (limit_type) {
4960 case 1:
4961 xdr_decode_hyper(p, maxsize);
4962 break;
4963 case 2:
4964 nblocks = be32_to_cpup(p++);
4965 blocksize = be32_to_cpup(p);
4966 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4967 }
4968 return 0;
4969 out_overflow:
4970 print_overflow_msg(__func__, xdr);
4971 return -EIO;
4972 }
4973
4974 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4975 {
4976 __be32 *p;
4977 uint32_t delegation_type;
4978 int status;
4979
4980 p = xdr_inline_decode(xdr, 4);
4981 if (unlikely(!p))
4982 goto out_overflow;
4983 delegation_type = be32_to_cpup(p);
4984 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4985 res->delegation_type = 0;
4986 return 0;
4987 }
4988 status = decode_stateid(xdr, &res->delegation);
4989 if (unlikely(status))
4990 return status;
4991 p = xdr_inline_decode(xdr, 4);
4992 if (unlikely(!p))
4993 goto out_overflow;
4994 res->do_recall = be32_to_cpup(p);
4995
4996 switch (delegation_type) {
4997 case NFS4_OPEN_DELEGATE_READ:
4998 res->delegation_type = FMODE_READ;
4999 break;
5000 case NFS4_OPEN_DELEGATE_WRITE:
5001 res->delegation_type = FMODE_WRITE|FMODE_READ;
5002 if (decode_space_limit(xdr, &res->maxsize) < 0)
5003 return -EIO;
5004 }
5005 return decode_ace(xdr, NULL, res->server->nfs_client);
5006 out_overflow:
5007 print_overflow_msg(__func__, xdr);
5008 return -EIO;
5009 }
5010
5011 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5012 {
5013 __be32 *p;
5014 uint32_t savewords, bmlen, i;
5015 int status;
5016
5017 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5018 return status;
5019 nfs_increment_open_seqid(status, res->seqid);
5020 if (status)
5021 return status;
5022 status = decode_stateid(xdr, &res->stateid);
5023 if (unlikely(status))
5024 return status;
5025
5026 decode_change_info(xdr, &res->cinfo);
5027
5028 p = xdr_inline_decode(xdr, 8);
5029 if (unlikely(!p))
5030 goto out_overflow;
5031 res->rflags = be32_to_cpup(p++);
5032 bmlen = be32_to_cpup(p);
5033 if (bmlen > 10)
5034 goto xdr_error;
5035
5036 p = xdr_inline_decode(xdr, bmlen << 2);
5037 if (unlikely(!p))
5038 goto out_overflow;
5039 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5040 for (i = 0; i < savewords; ++i)
5041 res->attrset[i] = be32_to_cpup(p++);
5042 for (; i < NFS4_BITMAP_SIZE; i++)
5043 res->attrset[i] = 0;
5044
5045 return decode_delegation(xdr, res);
5046 xdr_error:
5047 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5048 return -EIO;
5049 out_overflow:
5050 print_overflow_msg(__func__, xdr);
5051 return -EIO;
5052 }
5053
5054 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5055 {
5056 int status;
5057
5058 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5059 if (status != -EIO)
5060 nfs_increment_open_seqid(status, res->seqid);
5061 if (!status)
5062 status = decode_stateid(xdr, &res->stateid);
5063 return status;
5064 }
5065
5066 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5067 {
5068 int status;
5069
5070 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5071 if (status != -EIO)
5072 nfs_increment_open_seqid(status, res->seqid);
5073 if (!status)
5074 status = decode_stateid(xdr, &res->stateid);
5075 return status;
5076 }
5077
5078 static int decode_putfh(struct xdr_stream *xdr)
5079 {
5080 return decode_op_hdr(xdr, OP_PUTFH);
5081 }
5082
5083 static int decode_putrootfh(struct xdr_stream *xdr)
5084 {
5085 return decode_op_hdr(xdr, OP_PUTROOTFH);
5086 }
5087
5088 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5089 {
5090 __be32 *p;
5091 uint32_t count, eof, recvd;
5092 int status;
5093
5094 status = decode_op_hdr(xdr, OP_READ);
5095 if (status)
5096 return status;
5097 p = xdr_inline_decode(xdr, 8);
5098 if (unlikely(!p))
5099 goto out_overflow;
5100 eof = be32_to_cpup(p++);
5101 count = be32_to_cpup(p);
5102 recvd = xdr_read_pages(xdr, count);
5103 if (count > recvd) {
5104 dprintk("NFS: server cheating in read reply: "
5105 "count %u > recvd %u\n", count, recvd);
5106 count = recvd;
5107 eof = 0;
5108 }
5109 res->eof = eof;
5110 res->count = count;
5111 return 0;
5112 out_overflow:
5113 print_overflow_msg(__func__, xdr);
5114 return -EIO;
5115 }
5116
5117 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5118 {
5119 int status;
5120 __be32 verf[2];
5121
5122 status = decode_op_hdr(xdr, OP_READDIR);
5123 if (!status)
5124 status = decode_verifier(xdr, readdir->verifier.data);
5125 if (unlikely(status))
5126 return status;
5127 memcpy(verf, readdir->verifier.data, sizeof(verf));
5128 dprintk("%s: verifier = %08x:%08x\n",
5129 __func__, verf[0], verf[1]);
5130 return xdr_read_pages(xdr, xdr->buf->page_len);
5131 }
5132
5133 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5134 {
5135 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5136 u32 len, recvd;
5137 __be32 *p;
5138 int status;
5139
5140 status = decode_op_hdr(xdr, OP_READLINK);
5141 if (status)
5142 return status;
5143
5144 /* Convert length of symlink */
5145 p = xdr_inline_decode(xdr, 4);
5146 if (unlikely(!p))
5147 goto out_overflow;
5148 len = be32_to_cpup(p);
5149 if (len >= rcvbuf->page_len || len <= 0) {
5150 dprintk("nfs: server returned giant symlink!\n");
5151 return -ENAMETOOLONG;
5152 }
5153 recvd = xdr_read_pages(xdr, len);
5154 if (recvd < len) {
5155 dprintk("NFS: server cheating in readlink reply: "
5156 "count %u > recvd %u\n", len, recvd);
5157 return -EIO;
5158 }
5159 /*
5160 * The XDR encode routine has set things up so that
5161 * the link text will be copied directly into the
5162 * buffer. We just have to do overflow-checking,
5163 * and and null-terminate the text (the VFS expects
5164 * null-termination).
5165 */
5166 xdr_terminate_string(rcvbuf, len);
5167 return 0;
5168 out_overflow:
5169 print_overflow_msg(__func__, xdr);
5170 return -EIO;
5171 }
5172
5173 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5174 {
5175 int status;
5176
5177 status = decode_op_hdr(xdr, OP_REMOVE);
5178 if (status)
5179 goto out;
5180 status = decode_change_info(xdr, cinfo);
5181 out:
5182 return status;
5183 }
5184
5185 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5186 struct nfs4_change_info *new_cinfo)
5187 {
5188 int status;
5189
5190 status = decode_op_hdr(xdr, OP_RENAME);
5191 if (status)
5192 goto out;
5193 if ((status = decode_change_info(xdr, old_cinfo)))
5194 goto out;
5195 status = decode_change_info(xdr, new_cinfo);
5196 out:
5197 return status;
5198 }
5199
5200 static int decode_renew(struct xdr_stream *xdr)
5201 {
5202 return decode_op_hdr(xdr, OP_RENEW);
5203 }
5204
5205 static int
5206 decode_restorefh(struct xdr_stream *xdr)
5207 {
5208 return decode_op_hdr(xdr, OP_RESTOREFH);
5209 }
5210
5211 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5212 struct nfs_getaclres *res)
5213 {
5214 unsigned int savep;
5215 uint32_t attrlen,
5216 bitmap[3] = {0};
5217 int status;
5218 unsigned int pg_offset;
5219
5220 res->acl_len = 0;
5221 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5222 goto out;
5223
5224 xdr_enter_page(xdr, xdr->buf->page_len);
5225
5226 /* Calculate the offset of the page data */
5227 pg_offset = xdr->buf->head[0].iov_len;
5228
5229 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5230 goto out;
5231 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5232 goto out;
5233
5234 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5235 return -EIO;
5236 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5237
5238 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5239 * are stored with the acl data to handle the problem of
5240 * variable length bitmaps.*/
5241 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5242 res->acl_len = attrlen;
5243
5244 /* Check for receive buffer overflow */
5245 if (res->acl_len > (xdr->nwords << 2) ||
5246 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5247 res->acl_flags |= NFS4_ACL_TRUNC;
5248 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5249 attrlen, xdr->nwords << 2);
5250 }
5251 } else
5252 status = -EOPNOTSUPP;
5253
5254 out:
5255 return status;
5256 }
5257
5258 static int
5259 decode_savefh(struct xdr_stream *xdr)
5260 {
5261 return decode_op_hdr(xdr, OP_SAVEFH);
5262 }
5263
5264 static int decode_setattr(struct xdr_stream *xdr)
5265 {
5266 __be32 *p;
5267 uint32_t bmlen;
5268 int status;
5269
5270 status = decode_op_hdr(xdr, OP_SETATTR);
5271 if (status)
5272 return status;
5273 p = xdr_inline_decode(xdr, 4);
5274 if (unlikely(!p))
5275 goto out_overflow;
5276 bmlen = be32_to_cpup(p);
5277 p = xdr_inline_decode(xdr, bmlen << 2);
5278 if (likely(p))
5279 return 0;
5280 out_overflow:
5281 print_overflow_msg(__func__, xdr);
5282 return -EIO;
5283 }
5284
5285 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5286 {
5287 __be32 *p;
5288 uint32_t opnum;
5289 int32_t nfserr;
5290
5291 p = xdr_inline_decode(xdr, 8);
5292 if (unlikely(!p))
5293 goto out_overflow;
5294 opnum = be32_to_cpup(p++);
5295 if (opnum != OP_SETCLIENTID) {
5296 dprintk("nfs: decode_setclientid: Server returned operation"
5297 " %d\n", opnum);
5298 return -EIO;
5299 }
5300 nfserr = be32_to_cpup(p);
5301 if (nfserr == NFS_OK) {
5302 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5303 if (unlikely(!p))
5304 goto out_overflow;
5305 p = xdr_decode_hyper(p, &res->clientid);
5306 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5307 } else if (nfserr == NFSERR_CLID_INUSE) {
5308 uint32_t len;
5309
5310 /* skip netid string */
5311 p = xdr_inline_decode(xdr, 4);
5312 if (unlikely(!p))
5313 goto out_overflow;
5314 len = be32_to_cpup(p);
5315 p = xdr_inline_decode(xdr, len);
5316 if (unlikely(!p))
5317 goto out_overflow;
5318
5319 /* skip uaddr string */
5320 p = xdr_inline_decode(xdr, 4);
5321 if (unlikely(!p))
5322 goto out_overflow;
5323 len = be32_to_cpup(p);
5324 p = xdr_inline_decode(xdr, len);
5325 if (unlikely(!p))
5326 goto out_overflow;
5327 return -NFSERR_CLID_INUSE;
5328 } else
5329 return nfs4_stat_to_errno(nfserr);
5330
5331 return 0;
5332 out_overflow:
5333 print_overflow_msg(__func__, xdr);
5334 return -EIO;
5335 }
5336
5337 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5338 {
5339 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5340 }
5341
5342 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5343 {
5344 __be32 *p;
5345 int status;
5346
5347 status = decode_op_hdr(xdr, OP_WRITE);
5348 if (status)
5349 return status;
5350
5351 p = xdr_inline_decode(xdr, 8);
5352 if (unlikely(!p))
5353 goto out_overflow;
5354 res->count = be32_to_cpup(p++);
5355 res->verf->committed = be32_to_cpup(p++);
5356 return decode_write_verifier(xdr, &res->verf->verifier);
5357 out_overflow:
5358 print_overflow_msg(__func__, xdr);
5359 return -EIO;
5360 }
5361
5362 static int decode_delegreturn(struct xdr_stream *xdr)
5363 {
5364 return decode_op_hdr(xdr, OP_DELEGRETURN);
5365 }
5366
5367 static int decode_secinfo_gss(struct xdr_stream *xdr,
5368 struct nfs4_secinfo4 *flavor)
5369 {
5370 u32 oid_len;
5371 __be32 *p;
5372
5373 p = xdr_inline_decode(xdr, 4);
5374 if (unlikely(!p))
5375 goto out_overflow;
5376 oid_len = be32_to_cpup(p);
5377 if (oid_len > GSS_OID_MAX_LEN)
5378 goto out_err;
5379
5380 p = xdr_inline_decode(xdr, oid_len);
5381 if (unlikely(!p))
5382 goto out_overflow;
5383 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5384 flavor->flavor_info.oid.len = oid_len;
5385
5386 p = xdr_inline_decode(xdr, 8);
5387 if (unlikely(!p))
5388 goto out_overflow;
5389 flavor->flavor_info.qop = be32_to_cpup(p++);
5390 flavor->flavor_info.service = be32_to_cpup(p);
5391
5392 return 0;
5393
5394 out_overflow:
5395 print_overflow_msg(__func__, xdr);
5396 return -EIO;
5397 out_err:
5398 return -EINVAL;
5399 }
5400
5401 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5402 {
5403 struct nfs4_secinfo4 *sec_flavor;
5404 unsigned int i, num_flavors;
5405 int status;
5406 __be32 *p;
5407
5408 p = xdr_inline_decode(xdr, 4);
5409 if (unlikely(!p))
5410 goto out_overflow;
5411
5412 res->flavors->num_flavors = 0;
5413 num_flavors = be32_to_cpup(p);
5414
5415 for (i = 0; i < num_flavors; i++) {
5416 sec_flavor = &res->flavors->flavors[i];
5417 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5418 break;
5419
5420 p = xdr_inline_decode(xdr, 4);
5421 if (unlikely(!p))
5422 goto out_overflow;
5423 sec_flavor->flavor = be32_to_cpup(p);
5424
5425 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5426 status = decode_secinfo_gss(xdr, sec_flavor);
5427 if (status)
5428 goto out;
5429 }
5430 res->flavors->num_flavors++;
5431 }
5432
5433 status = 0;
5434 out:
5435 return status;
5436 out_overflow:
5437 print_overflow_msg(__func__, xdr);
5438 return -EIO;
5439 }
5440
5441 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5442 {
5443 int status = decode_op_hdr(xdr, OP_SECINFO);
5444 if (status)
5445 return status;
5446 return decode_secinfo_common(xdr, res);
5447 }
5448
5449 #if defined(CONFIG_NFS_V4_1)
5450 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5451 {
5452 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5453 if (status)
5454 return status;
5455 return decode_secinfo_common(xdr, res);
5456 }
5457
5458 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5459 {
5460 __be32 *p;
5461 uint32_t bitmap_words;
5462 unsigned int i;
5463
5464 p = xdr_inline_decode(xdr, 4);
5465 bitmap_words = be32_to_cpup(p++);
5466 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5467 return -EIO;
5468 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5469 for (i = 0; i < bitmap_words; i++)
5470 op_map->u.words[i] = be32_to_cpup(p++);
5471
5472 return 0;
5473 }
5474
5475 static int decode_exchange_id(struct xdr_stream *xdr,
5476 struct nfs41_exchange_id_res *res)
5477 {
5478 __be32 *p;
5479 uint32_t dummy;
5480 char *dummy_str;
5481 int status;
5482 uint32_t impl_id_count;
5483
5484 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5485 if (status)
5486 return status;
5487
5488 p = xdr_inline_decode(xdr, 8);
5489 if (unlikely(!p))
5490 goto out_overflow;
5491 xdr_decode_hyper(p, &res->clientid);
5492 p = xdr_inline_decode(xdr, 12);
5493 if (unlikely(!p))
5494 goto out_overflow;
5495 res->seqid = be32_to_cpup(p++);
5496 res->flags = be32_to_cpup(p++);
5497
5498 res->state_protect.how = be32_to_cpup(p);
5499 switch (res->state_protect.how) {
5500 case SP4_NONE:
5501 break;
5502 case SP4_MACH_CRED:
5503 status = decode_op_map(xdr, &res->state_protect.enforce);
5504 if (status)
5505 return status;
5506 status = decode_op_map(xdr, &res->state_protect.allow);
5507 if (status)
5508 return status;
5509 break;
5510 default:
5511 WARN_ON_ONCE(1);
5512 return -EIO;
5513 }
5514
5515 /* server_owner4.so_minor_id */
5516 p = xdr_inline_decode(xdr, 8);
5517 if (unlikely(!p))
5518 goto out_overflow;
5519 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5520
5521 /* server_owner4.so_major_id */
5522 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5523 if (unlikely(status))
5524 return status;
5525 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5526 return -EIO;
5527 memcpy(res->server_owner->major_id, dummy_str, dummy);
5528 res->server_owner->major_id_sz = dummy;
5529
5530 /* server_scope4 */
5531 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5532 if (unlikely(status))
5533 return status;
5534 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5535 return -EIO;
5536 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5537 res->server_scope->server_scope_sz = dummy;
5538
5539 /* Implementation Id */
5540 p = xdr_inline_decode(xdr, 4);
5541 if (unlikely(!p))
5542 goto out_overflow;
5543 impl_id_count = be32_to_cpup(p++);
5544
5545 if (impl_id_count) {
5546 /* nii_domain */
5547 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5548 if (unlikely(status))
5549 return status;
5550 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5551 return -EIO;
5552 memcpy(res->impl_id->domain, dummy_str, dummy);
5553
5554 /* nii_name */
5555 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5556 if (unlikely(status))
5557 return status;
5558 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5559 return -EIO;
5560 memcpy(res->impl_id->name, dummy_str, dummy);
5561
5562 /* nii_date */
5563 p = xdr_inline_decode(xdr, 12);
5564 if (unlikely(!p))
5565 goto out_overflow;
5566 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5567 res->impl_id->date.nseconds = be32_to_cpup(p);
5568
5569 /* if there's more than one entry, ignore the rest */
5570 }
5571 return 0;
5572 out_overflow:
5573 print_overflow_msg(__func__, xdr);
5574 return -EIO;
5575 }
5576
5577 static int decode_chan_attrs(struct xdr_stream *xdr,
5578 struct nfs4_channel_attrs *attrs)
5579 {
5580 __be32 *p;
5581 u32 nr_attrs, val;
5582
5583 p = xdr_inline_decode(xdr, 28);
5584 if (unlikely(!p))
5585 goto out_overflow;
5586 val = be32_to_cpup(p++); /* headerpadsz */
5587 if (val)
5588 return -EINVAL; /* no support for header padding yet */
5589 attrs->max_rqst_sz = be32_to_cpup(p++);
5590 attrs->max_resp_sz = be32_to_cpup(p++);
5591 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5592 attrs->max_ops = be32_to_cpup(p++);
5593 attrs->max_reqs = be32_to_cpup(p++);
5594 nr_attrs = be32_to_cpup(p);
5595 if (unlikely(nr_attrs > 1)) {
5596 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5597 "count %u\n", __func__, nr_attrs);
5598 return -EINVAL;
5599 }
5600 if (nr_attrs == 1) {
5601 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5602 if (unlikely(!p))
5603 goto out_overflow;
5604 }
5605 return 0;
5606 out_overflow:
5607 print_overflow_msg(__func__, xdr);
5608 return -EIO;
5609 }
5610
5611 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5612 {
5613 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5614 }
5615
5616 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5617 struct nfs41_bind_conn_to_session_res *res)
5618 {
5619 __be32 *p;
5620 int status;
5621
5622 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5623 if (!status)
5624 status = decode_sessionid(xdr, &res->session->sess_id);
5625 if (unlikely(status))
5626 return status;
5627
5628 /* dir flags, rdma mode bool */
5629 p = xdr_inline_decode(xdr, 8);
5630 if (unlikely(!p))
5631 goto out_overflow;
5632
5633 res->dir = be32_to_cpup(p++);
5634 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5635 return -EIO;
5636 if (be32_to_cpup(p) == 0)
5637 res->use_conn_in_rdma_mode = false;
5638 else
5639 res->use_conn_in_rdma_mode = true;
5640
5641 return 0;
5642 out_overflow:
5643 print_overflow_msg(__func__, xdr);
5644 return -EIO;
5645 }
5646
5647 static int decode_create_session(struct xdr_stream *xdr,
5648 struct nfs41_create_session_res *res)
5649 {
5650 __be32 *p;
5651 int status;
5652 struct nfs_client *clp = res->client;
5653 struct nfs4_session *session = clp->cl_session;
5654
5655 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5656 if (!status)
5657 status = decode_sessionid(xdr, &session->sess_id);
5658 if (unlikely(status))
5659 return status;
5660
5661 /* seqid, flags */
5662 p = xdr_inline_decode(xdr, 8);
5663 if (unlikely(!p))
5664 goto out_overflow;
5665 clp->cl_seqid = be32_to_cpup(p++);
5666 session->flags = be32_to_cpup(p);
5667
5668 /* Channel attributes */
5669 status = decode_chan_attrs(xdr, &session->fc_attrs);
5670 if (!status)
5671 status = decode_chan_attrs(xdr, &session->bc_attrs);
5672 return status;
5673 out_overflow:
5674 print_overflow_msg(__func__, xdr);
5675 return -EIO;
5676 }
5677
5678 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5679 {
5680 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5681 }
5682
5683 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5684 {
5685 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5686 }
5687
5688 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5689 {
5690 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5691 }
5692 #endif /* CONFIG_NFS_V4_1 */
5693
5694 static int decode_sequence(struct xdr_stream *xdr,
5695 struct nfs4_sequence_res *res,
5696 struct rpc_rqst *rqstp)
5697 {
5698 #if defined(CONFIG_NFS_V4_1)
5699 struct nfs4_session *session;
5700 struct nfs4_sessionid id;
5701 u32 dummy;
5702 int status;
5703 __be32 *p;
5704
5705 if (res->sr_slot == NULL)
5706 return 0;
5707 if (!res->sr_slot->table->session)
5708 return 0;
5709
5710 status = decode_op_hdr(xdr, OP_SEQUENCE);
5711 if (!status)
5712 status = decode_sessionid(xdr, &id);
5713 if (unlikely(status))
5714 goto out_err;
5715
5716 /*
5717 * If the server returns different values for sessionID, slotID or
5718 * sequence number, the server is looney tunes.
5719 */
5720 status = -EREMOTEIO;
5721 session = res->sr_slot->table->session;
5722
5723 if (memcmp(id.data, session->sess_id.data,
5724 NFS4_MAX_SESSIONID_LEN)) {
5725 dprintk("%s Invalid session id\n", __func__);
5726 goto out_err;
5727 }
5728
5729 p = xdr_inline_decode(xdr, 20);
5730 if (unlikely(!p))
5731 goto out_overflow;
5732
5733 /* seqid */
5734 dummy = be32_to_cpup(p++);
5735 if (dummy != res->sr_slot->seq_nr) {
5736 dprintk("%s Invalid sequence number\n", __func__);
5737 goto out_err;
5738 }
5739 /* slot id */
5740 dummy = be32_to_cpup(p++);
5741 if (dummy != res->sr_slot->slot_nr) {
5742 dprintk("%s Invalid slot id\n", __func__);
5743 goto out_err;
5744 }
5745 /* highest slot id */
5746 res->sr_highest_slotid = be32_to_cpup(p++);
5747 /* target highest slot id */
5748 res->sr_target_highest_slotid = be32_to_cpup(p++);
5749 /* result flags */
5750 res->sr_status_flags = be32_to_cpup(p);
5751 status = 0;
5752 out_err:
5753 res->sr_status = status;
5754 return status;
5755 out_overflow:
5756 print_overflow_msg(__func__, xdr);
5757 status = -EIO;
5758 goto out_err;
5759 #else /* CONFIG_NFS_V4_1 */
5760 return 0;
5761 #endif /* CONFIG_NFS_V4_1 */
5762 }
5763
5764 #if defined(CONFIG_NFS_V4_1)
5765 /*
5766 * TODO: Need to handle case when EOF != true;
5767 */
5768 static int decode_getdevicelist(struct xdr_stream *xdr,
5769 struct pnfs_devicelist *res)
5770 {
5771 __be32 *p;
5772 int status, i;
5773 nfs4_verifier verftemp;
5774
5775 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5776 if (status)
5777 return status;
5778
5779 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5780 if (unlikely(!p))
5781 goto out_overflow;
5782
5783 /* TODO: Skip cookie for now */
5784 p += 2;
5785
5786 /* Read verifier */
5787 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5788
5789 res->num_devs = be32_to_cpup(p);
5790
5791 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5792
5793 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5794 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5795 __func__, res->num_devs);
5796 return -EIO;
5797 }
5798
5799 p = xdr_inline_decode(xdr,
5800 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5801 if (unlikely(!p))
5802 goto out_overflow;
5803 for (i = 0; i < res->num_devs; i++)
5804 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5805 NFS4_DEVICEID4_SIZE);
5806 res->eof = be32_to_cpup(p);
5807 return 0;
5808 out_overflow:
5809 print_overflow_msg(__func__, xdr);
5810 return -EIO;
5811 }
5812
5813 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5814 struct pnfs_device *pdev)
5815 {
5816 __be32 *p;
5817 uint32_t len, type;
5818 int status;
5819
5820 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5821 if (status) {
5822 if (status == -ETOOSMALL) {
5823 p = xdr_inline_decode(xdr, 4);
5824 if (unlikely(!p))
5825 goto out_overflow;
5826 pdev->mincount = be32_to_cpup(p);
5827 dprintk("%s: Min count too small. mincnt = %u\n",
5828 __func__, pdev->mincount);
5829 }
5830 return status;
5831 }
5832
5833 p = xdr_inline_decode(xdr, 8);
5834 if (unlikely(!p))
5835 goto out_overflow;
5836 type = be32_to_cpup(p++);
5837 if (type != pdev->layout_type) {
5838 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5839 __func__, pdev->layout_type, type);
5840 return -EINVAL;
5841 }
5842 /*
5843 * Get the length of the opaque device_addr4. xdr_read_pages places
5844 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5845 * and places the remaining xdr data in xdr_buf->tail
5846 */
5847 pdev->mincount = be32_to_cpup(p);
5848 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5849 goto out_overflow;
5850
5851 /* Parse notification bitmap, verifying that it is zero. */
5852 p = xdr_inline_decode(xdr, 4);
5853 if (unlikely(!p))
5854 goto out_overflow;
5855 len = be32_to_cpup(p);
5856 if (len) {
5857 uint32_t i;
5858
5859 p = xdr_inline_decode(xdr, 4 * len);
5860 if (unlikely(!p))
5861 goto out_overflow;
5862 for (i = 0; i < len; i++, p++) {
5863 if (be32_to_cpup(p)) {
5864 dprintk("%s: notifications not supported\n",
5865 __func__);
5866 return -EIO;
5867 }
5868 }
5869 }
5870 return 0;
5871 out_overflow:
5872 print_overflow_msg(__func__, xdr);
5873 return -EIO;
5874 }
5875
5876 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5877 struct nfs4_layoutget_res *res)
5878 {
5879 __be32 *p;
5880 int status;
5881 u32 layout_count;
5882 u32 recvd;
5883
5884 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5885 if (status)
5886 return status;
5887 p = xdr_inline_decode(xdr, 4);
5888 if (unlikely(!p))
5889 goto out_overflow;
5890 res->return_on_close = be32_to_cpup(p);
5891 decode_stateid(xdr, &res->stateid);
5892 p = xdr_inline_decode(xdr, 4);
5893 if (unlikely(!p))
5894 goto out_overflow;
5895 layout_count = be32_to_cpup(p);
5896 if (!layout_count) {
5897 dprintk("%s: server responded with empty layout array\n",
5898 __func__);
5899 return -EINVAL;
5900 }
5901
5902 p = xdr_inline_decode(xdr, 28);
5903 if (unlikely(!p))
5904 goto out_overflow;
5905 p = xdr_decode_hyper(p, &res->range.offset);
5906 p = xdr_decode_hyper(p, &res->range.length);
5907 res->range.iomode = be32_to_cpup(p++);
5908 res->type = be32_to_cpup(p++);
5909 res->layoutp->len = be32_to_cpup(p);
5910
5911 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5912 __func__,
5913 (unsigned long)res->range.offset,
5914 (unsigned long)res->range.length,
5915 res->range.iomode,
5916 res->type,
5917 res->layoutp->len);
5918
5919 recvd = xdr_read_pages(xdr, res->layoutp->len);
5920 if (res->layoutp->len > recvd) {
5921 dprintk("NFS: server cheating in layoutget reply: "
5922 "layout len %u > recvd %u\n",
5923 res->layoutp->len, recvd);
5924 return -EINVAL;
5925 }
5926
5927 if (layout_count > 1) {
5928 /* We only handle a length one array at the moment. Any
5929 * further entries are just ignored. Note that this means
5930 * the client may see a response that is less than the
5931 * minimum it requested.
5932 */
5933 dprintk("%s: server responded with %d layouts, dropping tail\n",
5934 __func__, layout_count);
5935 }
5936
5937 return 0;
5938 out_overflow:
5939 print_overflow_msg(__func__, xdr);
5940 return -EIO;
5941 }
5942
5943 static int decode_layoutreturn(struct xdr_stream *xdr,
5944 struct nfs4_layoutreturn_res *res)
5945 {
5946 __be32 *p;
5947 int status;
5948
5949 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5950 if (status)
5951 return status;
5952 p = xdr_inline_decode(xdr, 4);
5953 if (unlikely(!p))
5954 goto out_overflow;
5955 res->lrs_present = be32_to_cpup(p);
5956 if (res->lrs_present)
5957 status = decode_stateid(xdr, &res->stateid);
5958 return status;
5959 out_overflow:
5960 print_overflow_msg(__func__, xdr);
5961 return -EIO;
5962 }
5963
5964 static int decode_layoutcommit(struct xdr_stream *xdr,
5965 struct rpc_rqst *req,
5966 struct nfs4_layoutcommit_res *res)
5967 {
5968 __be32 *p;
5969 __u32 sizechanged;
5970 int status;
5971
5972 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5973 res->status = status;
5974 if (status)
5975 return status;
5976
5977 p = xdr_inline_decode(xdr, 4);
5978 if (unlikely(!p))
5979 goto out_overflow;
5980 sizechanged = be32_to_cpup(p);
5981
5982 if (sizechanged) {
5983 /* throw away new size */
5984 p = xdr_inline_decode(xdr, 8);
5985 if (unlikely(!p))
5986 goto out_overflow;
5987 }
5988 return 0;
5989 out_overflow:
5990 print_overflow_msg(__func__, xdr);
5991 return -EIO;
5992 }
5993
5994 static int decode_test_stateid(struct xdr_stream *xdr,
5995 struct nfs41_test_stateid_res *res)
5996 {
5997 __be32 *p;
5998 int status;
5999 int num_res;
6000
6001 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6002 if (status)
6003 return status;
6004
6005 p = xdr_inline_decode(xdr, 4);
6006 if (unlikely(!p))
6007 goto out_overflow;
6008 num_res = be32_to_cpup(p++);
6009 if (num_res != 1)
6010 goto out;
6011
6012 p = xdr_inline_decode(xdr, 4);
6013 if (unlikely(!p))
6014 goto out_overflow;
6015 res->status = be32_to_cpup(p++);
6016
6017 return status;
6018 out_overflow:
6019 print_overflow_msg(__func__, xdr);
6020 out:
6021 return -EIO;
6022 }
6023
6024 static int decode_free_stateid(struct xdr_stream *xdr,
6025 struct nfs41_free_stateid_res *res)
6026 {
6027 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6028 return res->status;
6029 }
6030 #endif /* CONFIG_NFS_V4_1 */
6031
6032 /*
6033 * END OF "GENERIC" DECODE ROUTINES.
6034 */
6035
6036 /*
6037 * Decode OPEN_DOWNGRADE response
6038 */
6039 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6040 struct xdr_stream *xdr,
6041 struct nfs_closeres *res)
6042 {
6043 struct compound_hdr hdr;
6044 int status;
6045
6046 status = decode_compound_hdr(xdr, &hdr);
6047 if (status)
6048 goto out;
6049 status = decode_sequence(xdr, &res->seq_res, rqstp);
6050 if (status)
6051 goto out;
6052 status = decode_putfh(xdr);
6053 if (status)
6054 goto out;
6055 status = decode_open_downgrade(xdr, res);
6056 if (status != 0)
6057 goto out;
6058 decode_getfattr(xdr, res->fattr, res->server);
6059 out:
6060 return status;
6061 }
6062
6063 /*
6064 * Decode ACCESS response
6065 */
6066 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6067 struct nfs4_accessres *res)
6068 {
6069 struct compound_hdr hdr;
6070 int status;
6071
6072 status = decode_compound_hdr(xdr, &hdr);
6073 if (status)
6074 goto out;
6075 status = decode_sequence(xdr, &res->seq_res, rqstp);
6076 if (status)
6077 goto out;
6078 status = decode_putfh(xdr);
6079 if (status != 0)
6080 goto out;
6081 status = decode_access(xdr, &res->supported, &res->access);
6082 if (status != 0)
6083 goto out;
6084 decode_getfattr(xdr, res->fattr, res->server);
6085 out:
6086 return status;
6087 }
6088
6089 /*
6090 * Decode LOOKUP response
6091 */
6092 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6093 struct nfs4_lookup_res *res)
6094 {
6095 struct compound_hdr hdr;
6096 int status;
6097
6098 status = decode_compound_hdr(xdr, &hdr);
6099 if (status)
6100 goto out;
6101 status = decode_sequence(xdr, &res->seq_res, rqstp);
6102 if (status)
6103 goto out;
6104 status = decode_putfh(xdr);
6105 if (status)
6106 goto out;
6107 status = decode_lookup(xdr);
6108 if (status)
6109 goto out;
6110 status = decode_getfh(xdr, res->fh);
6111 if (status)
6112 goto out;
6113 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6114 out:
6115 return status;
6116 }
6117
6118 /*
6119 * Decode LOOKUP_ROOT response
6120 */
6121 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6122 struct xdr_stream *xdr,
6123 struct nfs4_lookup_res *res)
6124 {
6125 struct compound_hdr hdr;
6126 int status;
6127
6128 status = decode_compound_hdr(xdr, &hdr);
6129 if (status)
6130 goto out;
6131 status = decode_sequence(xdr, &res->seq_res, rqstp);
6132 if (status)
6133 goto out;
6134 status = decode_putrootfh(xdr);
6135 if (status)
6136 goto out;
6137 status = decode_getfh(xdr, res->fh);
6138 if (status == 0)
6139 status = decode_getfattr_label(xdr, res->fattr,
6140 res->label, res->server);
6141 out:
6142 return status;
6143 }
6144
6145 /*
6146 * Decode REMOVE response
6147 */
6148 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6149 struct nfs_removeres *res)
6150 {
6151 struct compound_hdr hdr;
6152 int status;
6153
6154 status = decode_compound_hdr(xdr, &hdr);
6155 if (status)
6156 goto out;
6157 status = decode_sequence(xdr, &res->seq_res, rqstp);
6158 if (status)
6159 goto out;
6160 status = decode_putfh(xdr);
6161 if (status)
6162 goto out;
6163 status = decode_remove(xdr, &res->cinfo);
6164 out:
6165 return status;
6166 }
6167
6168 /*
6169 * Decode RENAME response
6170 */
6171 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6172 struct nfs_renameres *res)
6173 {
6174 struct compound_hdr hdr;
6175 int status;
6176
6177 status = decode_compound_hdr(xdr, &hdr);
6178 if (status)
6179 goto out;
6180 status = decode_sequence(xdr, &res->seq_res, rqstp);
6181 if (status)
6182 goto out;
6183 status = decode_putfh(xdr);
6184 if (status)
6185 goto out;
6186 status = decode_savefh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_putfh(xdr);
6190 if (status)
6191 goto out;
6192 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6193 out:
6194 return status;
6195 }
6196
6197 /*
6198 * Decode LINK response
6199 */
6200 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6201 struct nfs4_link_res *res)
6202 {
6203 struct compound_hdr hdr;
6204 int status;
6205
6206 status = decode_compound_hdr(xdr, &hdr);
6207 if (status)
6208 goto out;
6209 status = decode_sequence(xdr, &res->seq_res, rqstp);
6210 if (status)
6211 goto out;
6212 status = decode_putfh(xdr);
6213 if (status)
6214 goto out;
6215 status = decode_savefh(xdr);
6216 if (status)
6217 goto out;
6218 status = decode_putfh(xdr);
6219 if (status)
6220 goto out;
6221 status = decode_link(xdr, &res->cinfo);
6222 if (status)
6223 goto out;
6224 /*
6225 * Note order: OP_LINK leaves the directory as the current
6226 * filehandle.
6227 */
6228 status = decode_restorefh(xdr);
6229 if (status)
6230 goto out;
6231 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6232 out:
6233 return status;
6234 }
6235
6236 /*
6237 * Decode CREATE response
6238 */
6239 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6240 struct nfs4_create_res *res)
6241 {
6242 struct compound_hdr hdr;
6243 int status;
6244
6245 status = decode_compound_hdr(xdr, &hdr);
6246 if (status)
6247 goto out;
6248 status = decode_sequence(xdr, &res->seq_res, rqstp);
6249 if (status)
6250 goto out;
6251 status = decode_putfh(xdr);
6252 if (status)
6253 goto out;
6254 status = decode_create(xdr, &res->dir_cinfo);
6255 if (status)
6256 goto out;
6257 status = decode_getfh(xdr, res->fh);
6258 if (status)
6259 goto out;
6260 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6261 out:
6262 return status;
6263 }
6264
6265 /*
6266 * Decode SYMLINK response
6267 */
6268 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6269 struct nfs4_create_res *res)
6270 {
6271 return nfs4_xdr_dec_create(rqstp, xdr, res);
6272 }
6273
6274 /*
6275 * Decode GETATTR response
6276 */
6277 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6278 struct nfs4_getattr_res *res)
6279 {
6280 struct compound_hdr hdr;
6281 int status;
6282
6283 status = decode_compound_hdr(xdr, &hdr);
6284 if (status)
6285 goto out;
6286 status = decode_sequence(xdr, &res->seq_res, rqstp);
6287 if (status)
6288 goto out;
6289 status = decode_putfh(xdr);
6290 if (status)
6291 goto out;
6292 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6293 out:
6294 return status;
6295 }
6296
6297 /*
6298 * Encode an SETACL request
6299 */
6300 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6301 struct nfs_setaclargs *args)
6302 {
6303 struct compound_hdr hdr = {
6304 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6305 };
6306
6307 encode_compound_hdr(xdr, req, &hdr);
6308 encode_sequence(xdr, &args->seq_args, &hdr);
6309 encode_putfh(xdr, args->fh, &hdr);
6310 encode_setacl(xdr, args, &hdr);
6311 encode_nops(&hdr);
6312 }
6313
6314 /*
6315 * Decode SETACL response
6316 */
6317 static int
6318 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6319 struct nfs_setaclres *res)
6320 {
6321 struct compound_hdr hdr;
6322 int status;
6323
6324 status = decode_compound_hdr(xdr, &hdr);
6325 if (status)
6326 goto out;
6327 status = decode_sequence(xdr, &res->seq_res, rqstp);
6328 if (status)
6329 goto out;
6330 status = decode_putfh(xdr);
6331 if (status)
6332 goto out;
6333 status = decode_setattr(xdr);
6334 out:
6335 return status;
6336 }
6337
6338 /*
6339 * Decode GETACL response
6340 */
6341 static int
6342 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6343 struct nfs_getaclres *res)
6344 {
6345 struct compound_hdr hdr;
6346 int status;
6347
6348 if (res->acl_scratch != NULL) {
6349 void *p = page_address(res->acl_scratch);
6350 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6351 }
6352 status = decode_compound_hdr(xdr, &hdr);
6353 if (status)
6354 goto out;
6355 status = decode_sequence(xdr, &res->seq_res, rqstp);
6356 if (status)
6357 goto out;
6358 status = decode_putfh(xdr);
6359 if (status)
6360 goto out;
6361 status = decode_getacl(xdr, rqstp, res);
6362
6363 out:
6364 return status;
6365 }
6366
6367 /*
6368 * Decode CLOSE response
6369 */
6370 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6371 struct nfs_closeres *res)
6372 {
6373 struct compound_hdr hdr;
6374 int status;
6375
6376 status = decode_compound_hdr(xdr, &hdr);
6377 if (status)
6378 goto out;
6379 status = decode_sequence(xdr, &res->seq_res, rqstp);
6380 if (status)
6381 goto out;
6382 status = decode_putfh(xdr);
6383 if (status)
6384 goto out;
6385 status = decode_close(xdr, res);
6386 if (status != 0)
6387 goto out;
6388 /*
6389 * Note: Server may do delete on close for this file
6390 * in which case the getattr call will fail with
6391 * an ESTALE error. Shouldn't be a problem,
6392 * though, since fattr->valid will remain unset.
6393 */
6394 decode_getfattr(xdr, res->fattr, res->server);
6395 out:
6396 return status;
6397 }
6398
6399 /*
6400 * Decode OPEN response
6401 */
6402 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6403 struct nfs_openres *res)
6404 {
6405 struct compound_hdr hdr;
6406 int status;
6407
6408 status = decode_compound_hdr(xdr, &hdr);
6409 if (status)
6410 goto out;
6411 status = decode_sequence(xdr, &res->seq_res, rqstp);
6412 if (status)
6413 goto out;
6414 status = decode_putfh(xdr);
6415 if (status)
6416 goto out;
6417 status = decode_open(xdr, res);
6418 if (status)
6419 goto out;
6420 status = decode_getfh(xdr, &res->fh);
6421 if (status)
6422 goto out;
6423 if (res->access_request)
6424 decode_access(xdr, &res->access_supported, &res->access_result);
6425 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6426 out:
6427 return status;
6428 }
6429
6430 /*
6431 * Decode OPEN_CONFIRM response
6432 */
6433 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6434 struct xdr_stream *xdr,
6435 struct nfs_open_confirmres *res)
6436 {
6437 struct compound_hdr hdr;
6438 int status;
6439
6440 status = decode_compound_hdr(xdr, &hdr);
6441 if (status)
6442 goto out;
6443 status = decode_putfh(xdr);
6444 if (status)
6445 goto out;
6446 status = decode_open_confirm(xdr, res);
6447 out:
6448 return status;
6449 }
6450
6451 /*
6452 * Decode OPEN response
6453 */
6454 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6455 struct xdr_stream *xdr,
6456 struct nfs_openres *res)
6457 {
6458 struct compound_hdr hdr;
6459 int status;
6460
6461 status = decode_compound_hdr(xdr, &hdr);
6462 if (status)
6463 goto out;
6464 status = decode_sequence(xdr, &res->seq_res, rqstp);
6465 if (status)
6466 goto out;
6467 status = decode_putfh(xdr);
6468 if (status)
6469 goto out;
6470 status = decode_open(xdr, res);
6471 if (status)
6472 goto out;
6473 if (res->access_request)
6474 decode_access(xdr, &res->access_supported, &res->access_result);
6475 decode_getfattr(xdr, res->f_attr, res->server);
6476 out:
6477 return status;
6478 }
6479
6480 /*
6481 * Decode SETATTR response
6482 */
6483 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6484 struct xdr_stream *xdr,
6485 struct nfs_setattrres *res)
6486 {
6487 struct compound_hdr hdr;
6488 int status;
6489
6490 status = decode_compound_hdr(xdr, &hdr);
6491 if (status)
6492 goto out;
6493 status = decode_sequence(xdr, &res->seq_res, rqstp);
6494 if (status)
6495 goto out;
6496 status = decode_putfh(xdr);
6497 if (status)
6498 goto out;
6499 status = decode_setattr(xdr);
6500 if (status)
6501 goto out;
6502 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6503 out:
6504 return status;
6505 }
6506
6507 /*
6508 * Decode LOCK response
6509 */
6510 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6511 struct nfs_lock_res *res)
6512 {
6513 struct compound_hdr hdr;
6514 int status;
6515
6516 status = decode_compound_hdr(xdr, &hdr);
6517 if (status)
6518 goto out;
6519 status = decode_sequence(xdr, &res->seq_res, rqstp);
6520 if (status)
6521 goto out;
6522 status = decode_putfh(xdr);
6523 if (status)
6524 goto out;
6525 status = decode_lock(xdr, res);
6526 out:
6527 return status;
6528 }
6529
6530 /*
6531 * Decode LOCKT response
6532 */
6533 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6534 struct nfs_lockt_res *res)
6535 {
6536 struct compound_hdr hdr;
6537 int status;
6538
6539 status = decode_compound_hdr(xdr, &hdr);
6540 if (status)
6541 goto out;
6542 status = decode_sequence(xdr, &res->seq_res, rqstp);
6543 if (status)
6544 goto out;
6545 status = decode_putfh(xdr);
6546 if (status)
6547 goto out;
6548 status = decode_lockt(xdr, res);
6549 out:
6550 return status;
6551 }
6552
6553 /*
6554 * Decode LOCKU response
6555 */
6556 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6557 struct nfs_locku_res *res)
6558 {
6559 struct compound_hdr hdr;
6560 int status;
6561
6562 status = decode_compound_hdr(xdr, &hdr);
6563 if (status)
6564 goto out;
6565 status = decode_sequence(xdr, &res->seq_res, rqstp);
6566 if (status)
6567 goto out;
6568 status = decode_putfh(xdr);
6569 if (status)
6570 goto out;
6571 status = decode_locku(xdr, res);
6572 out:
6573 return status;
6574 }
6575
6576 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6577 struct xdr_stream *xdr, void *dummy)
6578 {
6579 struct compound_hdr hdr;
6580 int status;
6581
6582 status = decode_compound_hdr(xdr, &hdr);
6583 if (!status)
6584 status = decode_release_lockowner(xdr);
6585 return status;
6586 }
6587
6588 /*
6589 * Decode READLINK response
6590 */
6591 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6592 struct xdr_stream *xdr,
6593 struct nfs4_readlink_res *res)
6594 {
6595 struct compound_hdr hdr;
6596 int status;
6597
6598 status = decode_compound_hdr(xdr, &hdr);
6599 if (status)
6600 goto out;
6601 status = decode_sequence(xdr, &res->seq_res, rqstp);
6602 if (status)
6603 goto out;
6604 status = decode_putfh(xdr);
6605 if (status)
6606 goto out;
6607 status = decode_readlink(xdr, rqstp);
6608 out:
6609 return status;
6610 }
6611
6612 /*
6613 * Decode READDIR response
6614 */
6615 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6616 struct nfs4_readdir_res *res)
6617 {
6618 struct compound_hdr hdr;
6619 int status;
6620
6621 status = decode_compound_hdr(xdr, &hdr);
6622 if (status)
6623 goto out;
6624 status = decode_sequence(xdr, &res->seq_res, rqstp);
6625 if (status)
6626 goto out;
6627 status = decode_putfh(xdr);
6628 if (status)
6629 goto out;
6630 status = decode_readdir(xdr, rqstp, res);
6631 out:
6632 return status;
6633 }
6634
6635 /*
6636 * Decode Read response
6637 */
6638 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6639 struct nfs_readres *res)
6640 {
6641 struct compound_hdr hdr;
6642 int status;
6643
6644 status = decode_compound_hdr(xdr, &hdr);
6645 if (status)
6646 goto out;
6647 status = decode_sequence(xdr, &res->seq_res, rqstp);
6648 if (status)
6649 goto out;
6650 status = decode_putfh(xdr);
6651 if (status)
6652 goto out;
6653 status = decode_read(xdr, rqstp, res);
6654 if (!status)
6655 status = res->count;
6656 out:
6657 return status;
6658 }
6659
6660 /*
6661 * Decode WRITE response
6662 */
6663 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6664 struct nfs_writeres *res)
6665 {
6666 struct compound_hdr hdr;
6667 int status;
6668
6669 status = decode_compound_hdr(xdr, &hdr);
6670 if (status)
6671 goto out;
6672 status = decode_sequence(xdr, &res->seq_res, rqstp);
6673 if (status)
6674 goto out;
6675 status = decode_putfh(xdr);
6676 if (status)
6677 goto out;
6678 status = decode_write(xdr, res);
6679 if (status)
6680 goto out;
6681 if (res->fattr)
6682 decode_getfattr(xdr, res->fattr, res->server);
6683 if (!status)
6684 status = res->count;
6685 out:
6686 return status;
6687 }
6688
6689 /*
6690 * Decode COMMIT response
6691 */
6692 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693 struct nfs_commitres *res)
6694 {
6695 struct compound_hdr hdr;
6696 int status;
6697
6698 status = decode_compound_hdr(xdr, &hdr);
6699 if (status)
6700 goto out;
6701 status = decode_sequence(xdr, &res->seq_res, rqstp);
6702 if (status)
6703 goto out;
6704 status = decode_putfh(xdr);
6705 if (status)
6706 goto out;
6707 status = decode_commit(xdr, res);
6708 out:
6709 return status;
6710 }
6711
6712 /*
6713 * Decode FSINFO response
6714 */
6715 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6716 struct nfs4_fsinfo_res *res)
6717 {
6718 struct compound_hdr hdr;
6719 int status;
6720
6721 status = decode_compound_hdr(xdr, &hdr);
6722 if (!status)
6723 status = decode_sequence(xdr, &res->seq_res, req);
6724 if (!status)
6725 status = decode_putfh(xdr);
6726 if (!status)
6727 status = decode_fsinfo(xdr, res->fsinfo);
6728 return status;
6729 }
6730
6731 /*
6732 * Decode PATHCONF response
6733 */
6734 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6735 struct nfs4_pathconf_res *res)
6736 {
6737 struct compound_hdr hdr;
6738 int status;
6739
6740 status = decode_compound_hdr(xdr, &hdr);
6741 if (!status)
6742 status = decode_sequence(xdr, &res->seq_res, req);
6743 if (!status)
6744 status = decode_putfh(xdr);
6745 if (!status)
6746 status = decode_pathconf(xdr, res->pathconf);
6747 return status;
6748 }
6749
6750 /*
6751 * Decode STATFS response
6752 */
6753 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6754 struct nfs4_statfs_res *res)
6755 {
6756 struct compound_hdr hdr;
6757 int status;
6758
6759 status = decode_compound_hdr(xdr, &hdr);
6760 if (!status)
6761 status = decode_sequence(xdr, &res->seq_res, req);
6762 if (!status)
6763 status = decode_putfh(xdr);
6764 if (!status)
6765 status = decode_statfs(xdr, res->fsstat);
6766 return status;
6767 }
6768
6769 /*
6770 * Decode GETATTR_BITMAP response
6771 */
6772 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6773 struct xdr_stream *xdr,
6774 struct nfs4_server_caps_res *res)
6775 {
6776 struct compound_hdr hdr;
6777 int status;
6778
6779 status = decode_compound_hdr(xdr, &hdr);
6780 if (status)
6781 goto out;
6782 status = decode_sequence(xdr, &res->seq_res, req);
6783 if (status)
6784 goto out;
6785 status = decode_putfh(xdr);
6786 if (status)
6787 goto out;
6788 status = decode_server_caps(xdr, res);
6789 out:
6790 return status;
6791 }
6792
6793 /*
6794 * Decode RENEW response
6795 */
6796 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6797 void *__unused)
6798 {
6799 struct compound_hdr hdr;
6800 int status;
6801
6802 status = decode_compound_hdr(xdr, &hdr);
6803 if (!status)
6804 status = decode_renew(xdr);
6805 return status;
6806 }
6807
6808 /*
6809 * Decode SETCLIENTID response
6810 */
6811 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6812 struct xdr_stream *xdr,
6813 struct nfs4_setclientid_res *res)
6814 {
6815 struct compound_hdr hdr;
6816 int status;
6817
6818 status = decode_compound_hdr(xdr, &hdr);
6819 if (!status)
6820 status = decode_setclientid(xdr, res);
6821 return status;
6822 }
6823
6824 /*
6825 * Decode SETCLIENTID_CONFIRM response
6826 */
6827 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6828 struct xdr_stream *xdr)
6829 {
6830 struct compound_hdr hdr;
6831 int status;
6832
6833 status = decode_compound_hdr(xdr, &hdr);
6834 if (!status)
6835 status = decode_setclientid_confirm(xdr);
6836 return status;
6837 }
6838
6839 /*
6840 * Decode DELEGRETURN response
6841 */
6842 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6843 struct xdr_stream *xdr,
6844 struct nfs4_delegreturnres *res)
6845 {
6846 struct compound_hdr hdr;
6847 int status;
6848
6849 status = decode_compound_hdr(xdr, &hdr);
6850 if (status)
6851 goto out;
6852 status = decode_sequence(xdr, &res->seq_res, rqstp);
6853 if (status)
6854 goto out;
6855 status = decode_putfh(xdr);
6856 if (status != 0)
6857 goto out;
6858 status = decode_getfattr(xdr, res->fattr, res->server);
6859 if (status != 0)
6860 goto out;
6861 status = decode_delegreturn(xdr);
6862 out:
6863 return status;
6864 }
6865
6866 /*
6867 * Decode FS_LOCATIONS response
6868 */
6869 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6870 struct xdr_stream *xdr,
6871 struct nfs4_fs_locations_res *res)
6872 {
6873 struct compound_hdr hdr;
6874 int status;
6875
6876 status = decode_compound_hdr(xdr, &hdr);
6877 if (status)
6878 goto out;
6879 status = decode_sequence(xdr, &res->seq_res, req);
6880 if (status)
6881 goto out;
6882 status = decode_putfh(xdr);
6883 if (status)
6884 goto out;
6885 if (res->migration) {
6886 xdr_enter_page(xdr, PAGE_SIZE);
6887 status = decode_getfattr_generic(xdr,
6888 &res->fs_locations->fattr,
6889 NULL, res->fs_locations,
6890 NULL, res->fs_locations->server);
6891 if (status)
6892 goto out;
6893 if (res->renew)
6894 status = decode_renew(xdr);
6895 } else {
6896 status = decode_lookup(xdr);
6897 if (status)
6898 goto out;
6899 xdr_enter_page(xdr, PAGE_SIZE);
6900 status = decode_getfattr_generic(xdr,
6901 &res->fs_locations->fattr,
6902 NULL, res->fs_locations,
6903 NULL, res->fs_locations->server);
6904 }
6905 out:
6906 return status;
6907 }
6908
6909 /*
6910 * Decode SECINFO response
6911 */
6912 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6913 struct xdr_stream *xdr,
6914 struct nfs4_secinfo_res *res)
6915 {
6916 struct compound_hdr hdr;
6917 int status;
6918
6919 status = decode_compound_hdr(xdr, &hdr);
6920 if (status)
6921 goto out;
6922 status = decode_sequence(xdr, &res->seq_res, rqstp);
6923 if (status)
6924 goto out;
6925 status = decode_putfh(xdr);
6926 if (status)
6927 goto out;
6928 status = decode_secinfo(xdr, res);
6929 out:
6930 return status;
6931 }
6932
6933 /*
6934 * Decode FSID_PRESENT response
6935 */
6936 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6937 struct xdr_stream *xdr,
6938 struct nfs4_fsid_present_res *res)
6939 {
6940 struct compound_hdr hdr;
6941 int status;
6942
6943 status = decode_compound_hdr(xdr, &hdr);
6944 if (status)
6945 goto out;
6946 status = decode_sequence(xdr, &res->seq_res, rqstp);
6947 if (status)
6948 goto out;
6949 status = decode_putfh(xdr);
6950 if (status)
6951 goto out;
6952 status = decode_getfh(xdr, res->fh);
6953 if (status)
6954 goto out;
6955 if (res->renew)
6956 status = decode_renew(xdr);
6957 out:
6958 return status;
6959 }
6960
6961 #if defined(CONFIG_NFS_V4_1)
6962 /*
6963 * Decode BIND_CONN_TO_SESSION response
6964 */
6965 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6966 struct xdr_stream *xdr,
6967 void *res)
6968 {
6969 struct compound_hdr hdr;
6970 int status;
6971
6972 status = decode_compound_hdr(xdr, &hdr);
6973 if (!status)
6974 status = decode_bind_conn_to_session(xdr, res);
6975 return status;
6976 }
6977
6978 /*
6979 * Decode EXCHANGE_ID response
6980 */
6981 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6982 struct xdr_stream *xdr,
6983 void *res)
6984 {
6985 struct compound_hdr hdr;
6986 int status;
6987
6988 status = decode_compound_hdr(xdr, &hdr);
6989 if (!status)
6990 status = decode_exchange_id(xdr, res);
6991 return status;
6992 }
6993
6994 /*
6995 * Decode CREATE_SESSION response
6996 */
6997 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6998 struct xdr_stream *xdr,
6999 struct nfs41_create_session_res *res)
7000 {
7001 struct compound_hdr hdr;
7002 int status;
7003
7004 status = decode_compound_hdr(xdr, &hdr);
7005 if (!status)
7006 status = decode_create_session(xdr, res);
7007 return status;
7008 }
7009
7010 /*
7011 * Decode DESTROY_SESSION response
7012 */
7013 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7014 struct xdr_stream *xdr,
7015 void *res)
7016 {
7017 struct compound_hdr hdr;
7018 int status;
7019
7020 status = decode_compound_hdr(xdr, &hdr);
7021 if (!status)
7022 status = decode_destroy_session(xdr, res);
7023 return status;
7024 }
7025
7026 /*
7027 * Decode DESTROY_CLIENTID response
7028 */
7029 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7030 struct xdr_stream *xdr,
7031 void *res)
7032 {
7033 struct compound_hdr hdr;
7034 int status;
7035
7036 status = decode_compound_hdr(xdr, &hdr);
7037 if (!status)
7038 status = decode_destroy_clientid(xdr, res);
7039 return status;
7040 }
7041
7042 /*
7043 * Decode SEQUENCE response
7044 */
7045 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7046 struct xdr_stream *xdr,
7047 struct nfs4_sequence_res *res)
7048 {
7049 struct compound_hdr hdr;
7050 int status;
7051
7052 status = decode_compound_hdr(xdr, &hdr);
7053 if (!status)
7054 status = decode_sequence(xdr, res, rqstp);
7055 return status;
7056 }
7057
7058 /*
7059 * Decode GET_LEASE_TIME response
7060 */
7061 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7062 struct xdr_stream *xdr,
7063 struct nfs4_get_lease_time_res *res)
7064 {
7065 struct compound_hdr hdr;
7066 int status;
7067
7068 status = decode_compound_hdr(xdr, &hdr);
7069 if (!status)
7070 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7071 if (!status)
7072 status = decode_putrootfh(xdr);
7073 if (!status)
7074 status = decode_fsinfo(xdr, res->lr_fsinfo);
7075 return status;
7076 }
7077
7078 /*
7079 * Decode RECLAIM_COMPLETE response
7080 */
7081 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7082 struct xdr_stream *xdr,
7083 struct nfs41_reclaim_complete_res *res)
7084 {
7085 struct compound_hdr hdr;
7086 int status;
7087
7088 status = decode_compound_hdr(xdr, &hdr);
7089 if (!status)
7090 status = decode_sequence(xdr, &res->seq_res, rqstp);
7091 if (!status)
7092 status = decode_reclaim_complete(xdr, (void *)NULL);
7093 return status;
7094 }
7095
7096 /*
7097 * Decode GETDEVICELIST response
7098 */
7099 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7100 struct xdr_stream *xdr,
7101 struct nfs4_getdevicelist_res *res)
7102 {
7103 struct compound_hdr hdr;
7104 int status;
7105
7106 dprintk("encoding getdevicelist!\n");
7107
7108 status = decode_compound_hdr(xdr, &hdr);
7109 if (status != 0)
7110 goto out;
7111 status = decode_sequence(xdr, &res->seq_res, rqstp);
7112 if (status != 0)
7113 goto out;
7114 status = decode_putfh(xdr);
7115 if (status != 0)
7116 goto out;
7117 status = decode_getdevicelist(xdr, res->devlist);
7118 out:
7119 return status;
7120 }
7121
7122 /*
7123 * Decode GETDEVINFO response
7124 */
7125 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7126 struct xdr_stream *xdr,
7127 struct nfs4_getdeviceinfo_res *res)
7128 {
7129 struct compound_hdr hdr;
7130 int status;
7131
7132 status = decode_compound_hdr(xdr, &hdr);
7133 if (status != 0)
7134 goto out;
7135 status = decode_sequence(xdr, &res->seq_res, rqstp);
7136 if (status != 0)
7137 goto out;
7138 status = decode_getdeviceinfo(xdr, res->pdev);
7139 out:
7140 return status;
7141 }
7142
7143 /*
7144 * Decode LAYOUTGET response
7145 */
7146 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7147 struct xdr_stream *xdr,
7148 struct nfs4_layoutget_res *res)
7149 {
7150 struct compound_hdr hdr;
7151 int status;
7152
7153 status = decode_compound_hdr(xdr, &hdr);
7154 if (status)
7155 goto out;
7156 status = decode_sequence(xdr, &res->seq_res, rqstp);
7157 if (status)
7158 goto out;
7159 status = decode_putfh(xdr);
7160 if (status)
7161 goto out;
7162 status = decode_layoutget(xdr, rqstp, res);
7163 out:
7164 return status;
7165 }
7166
7167 /*
7168 * Decode LAYOUTRETURN response
7169 */
7170 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7171 struct xdr_stream *xdr,
7172 struct nfs4_layoutreturn_res *res)
7173 {
7174 struct compound_hdr hdr;
7175 int status;
7176
7177 status = decode_compound_hdr(xdr, &hdr);
7178 if (status)
7179 goto out;
7180 status = decode_sequence(xdr, &res->seq_res, rqstp);
7181 if (status)
7182 goto out;
7183 status = decode_putfh(xdr);
7184 if (status)
7185 goto out;
7186 status = decode_layoutreturn(xdr, res);
7187 out:
7188 return status;
7189 }
7190
7191 /*
7192 * Decode LAYOUTCOMMIT response
7193 */
7194 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7195 struct xdr_stream *xdr,
7196 struct nfs4_layoutcommit_res *res)
7197 {
7198 struct compound_hdr hdr;
7199 int status;
7200
7201 status = decode_compound_hdr(xdr, &hdr);
7202 if (status)
7203 goto out;
7204 status = decode_sequence(xdr, &res->seq_res, rqstp);
7205 if (status)
7206 goto out;
7207 status = decode_putfh(xdr);
7208 if (status)
7209 goto out;
7210 status = decode_layoutcommit(xdr, rqstp, res);
7211 if (status)
7212 goto out;
7213 decode_getfattr(xdr, res->fattr, res->server);
7214 out:
7215 return status;
7216 }
7217
7218 /*
7219 * Decode SECINFO_NO_NAME response
7220 */
7221 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7222 struct xdr_stream *xdr,
7223 struct nfs4_secinfo_res *res)
7224 {
7225 struct compound_hdr hdr;
7226 int status;
7227
7228 status = decode_compound_hdr(xdr, &hdr);
7229 if (status)
7230 goto out;
7231 status = decode_sequence(xdr, &res->seq_res, rqstp);
7232 if (status)
7233 goto out;
7234 status = decode_putrootfh(xdr);
7235 if (status)
7236 goto out;
7237 status = decode_secinfo_no_name(xdr, res);
7238 out:
7239 return status;
7240 }
7241
7242 /*
7243 * Decode TEST_STATEID response
7244 */
7245 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7246 struct xdr_stream *xdr,
7247 struct nfs41_test_stateid_res *res)
7248 {
7249 struct compound_hdr hdr;
7250 int status;
7251
7252 status = decode_compound_hdr(xdr, &hdr);
7253 if (status)
7254 goto out;
7255 status = decode_sequence(xdr, &res->seq_res, rqstp);
7256 if (status)
7257 goto out;
7258 status = decode_test_stateid(xdr, res);
7259 out:
7260 return status;
7261 }
7262
7263 /*
7264 * Decode FREE_STATEID response
7265 */
7266 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7267 struct xdr_stream *xdr,
7268 struct nfs41_free_stateid_res *res)
7269 {
7270 struct compound_hdr hdr;
7271 int status;
7272
7273 status = decode_compound_hdr(xdr, &hdr);
7274 if (status)
7275 goto out;
7276 status = decode_sequence(xdr, &res->seq_res, rqstp);
7277 if (status)
7278 goto out;
7279 status = decode_free_stateid(xdr, res);
7280 out:
7281 return status;
7282 }
7283 #endif /* CONFIG_NFS_V4_1 */
7284
7285 /**
7286 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7287 * the local page cache.
7288 * @xdr: XDR stream where entry resides
7289 * @entry: buffer to fill in with entry data
7290 * @plus: boolean indicating whether this should be a readdirplus entry
7291 *
7292 * Returns zero if successful, otherwise a negative errno value is
7293 * returned.
7294 *
7295 * This function is not invoked during READDIR reply decoding, but
7296 * rather whenever an application invokes the getdents(2) system call
7297 * on a directory already in our cache.
7298 */
7299 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7300 int plus)
7301 {
7302 unsigned int savep;
7303 uint32_t bitmap[3] = {0};
7304 uint32_t len;
7305 __be32 *p = xdr_inline_decode(xdr, 4);
7306 if (unlikely(!p))
7307 goto out_overflow;
7308 if (*p == xdr_zero) {
7309 p = xdr_inline_decode(xdr, 4);
7310 if (unlikely(!p))
7311 goto out_overflow;
7312 if (*p == xdr_zero)
7313 return -EAGAIN;
7314 entry->eof = 1;
7315 return -EBADCOOKIE;
7316 }
7317
7318 p = xdr_inline_decode(xdr, 12);
7319 if (unlikely(!p))
7320 goto out_overflow;
7321 entry->prev_cookie = entry->cookie;
7322 p = xdr_decode_hyper(p, &entry->cookie);
7323 entry->len = be32_to_cpup(p);
7324
7325 p = xdr_inline_decode(xdr, entry->len);
7326 if (unlikely(!p))
7327 goto out_overflow;
7328 entry->name = (const char *) p;
7329
7330 /*
7331 * In case the server doesn't return an inode number,
7332 * we fake one here. (We don't use inode number 0,
7333 * since glibc seems to choke on it...)
7334 */
7335 entry->ino = 1;
7336 entry->fattr->valid = 0;
7337
7338 if (decode_attr_bitmap(xdr, bitmap) < 0)
7339 goto out_overflow;
7340
7341 if (decode_attr_length(xdr, &len, &savep) < 0)
7342 goto out_overflow;
7343
7344 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7345 NULL, entry->label, entry->server) < 0)
7346 goto out_overflow;
7347 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7348 entry->ino = entry->fattr->mounted_on_fileid;
7349 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7350 entry->ino = entry->fattr->fileid;
7351
7352 entry->d_type = DT_UNKNOWN;
7353 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7354 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7355
7356 return 0;
7357
7358 out_overflow:
7359 print_overflow_msg(__func__, xdr);
7360 return -EAGAIN;
7361 }
7362
7363 /*
7364 * We need to translate between nfs status return values and
7365 * the local errno values which may not be the same.
7366 */
7367 static struct {
7368 int stat;
7369 int errno;
7370 } nfs_errtbl[] = {
7371 { NFS4_OK, 0 },
7372 { NFS4ERR_PERM, -EPERM },
7373 { NFS4ERR_NOENT, -ENOENT },
7374 { NFS4ERR_IO, -errno_NFSERR_IO},
7375 { NFS4ERR_NXIO, -ENXIO },
7376 { NFS4ERR_ACCESS, -EACCES },
7377 { NFS4ERR_EXIST, -EEXIST },
7378 { NFS4ERR_XDEV, -EXDEV },
7379 { NFS4ERR_NOTDIR, -ENOTDIR },
7380 { NFS4ERR_ISDIR, -EISDIR },
7381 { NFS4ERR_INVAL, -EINVAL },
7382 { NFS4ERR_FBIG, -EFBIG },
7383 { NFS4ERR_NOSPC, -ENOSPC },
7384 { NFS4ERR_ROFS, -EROFS },
7385 { NFS4ERR_MLINK, -EMLINK },
7386 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7387 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7388 { NFS4ERR_DQUOT, -EDQUOT },
7389 { NFS4ERR_STALE, -ESTALE },
7390 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7391 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7392 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7393 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7394 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7395 { NFS4ERR_BADTYPE, -EBADTYPE },
7396 { NFS4ERR_LOCKED, -EAGAIN },
7397 { NFS4ERR_SYMLINK, -ELOOP },
7398 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7399 { NFS4ERR_DEADLOCK, -EDEADLK },
7400 { -1, -EIO }
7401 };
7402
7403 /*
7404 * Convert an NFS error code to a local one.
7405 * This one is used jointly by NFSv2 and NFSv3.
7406 */
7407 static int
7408 nfs4_stat_to_errno(int stat)
7409 {
7410 int i;
7411 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7412 if (nfs_errtbl[i].stat == stat)
7413 return nfs_errtbl[i].errno;
7414 }
7415 if (stat <= 10000 || stat > 10100) {
7416 /* The server is looney tunes. */
7417 return -EREMOTEIO;
7418 }
7419 /* If we cannot translate the error, the recovery routines should
7420 * handle it.
7421 * Note: remaining NFSv4 error codes have values > 10000, so should
7422 * not conflict with native Linux error codes.
7423 */
7424 return -stat;
7425 }
7426
7427 #define PROC(proc, argtype, restype) \
7428 [NFSPROC4_CLNT_##proc] = { \
7429 .p_proc = NFSPROC4_COMPOUND, \
7430 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7431 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7432 .p_arglen = NFS4_##argtype##_sz, \
7433 .p_replen = NFS4_##restype##_sz, \
7434 .p_statidx = NFSPROC4_CLNT_##proc, \
7435 .p_name = #proc, \
7436 }
7437
7438 struct rpc_procinfo nfs4_procedures[] = {
7439 PROC(READ, enc_read, dec_read),
7440 PROC(WRITE, enc_write, dec_write),
7441 PROC(COMMIT, enc_commit, dec_commit),
7442 PROC(OPEN, enc_open, dec_open),
7443 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7444 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7445 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7446 PROC(CLOSE, enc_close, dec_close),
7447 PROC(SETATTR, enc_setattr, dec_setattr),
7448 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7449 PROC(RENEW, enc_renew, dec_renew),
7450 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7451 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7452 PROC(LOCK, enc_lock, dec_lock),
7453 PROC(LOCKT, enc_lockt, dec_lockt),
7454 PROC(LOCKU, enc_locku, dec_locku),
7455 PROC(ACCESS, enc_access, dec_access),
7456 PROC(GETATTR, enc_getattr, dec_getattr),
7457 PROC(LOOKUP, enc_lookup, dec_lookup),
7458 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7459 PROC(REMOVE, enc_remove, dec_remove),
7460 PROC(RENAME, enc_rename, dec_rename),
7461 PROC(LINK, enc_link, dec_link),
7462 PROC(SYMLINK, enc_symlink, dec_symlink),
7463 PROC(CREATE, enc_create, dec_create),
7464 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7465 PROC(STATFS, enc_statfs, dec_statfs),
7466 PROC(READLINK, enc_readlink, dec_readlink),
7467 PROC(READDIR, enc_readdir, dec_readdir),
7468 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7469 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7470 PROC(GETACL, enc_getacl, dec_getacl),
7471 PROC(SETACL, enc_setacl, dec_setacl),
7472 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7473 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7474 PROC(SECINFO, enc_secinfo, dec_secinfo),
7475 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7476 #if defined(CONFIG_NFS_V4_1)
7477 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7478 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7479 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7480 PROC(SEQUENCE, enc_sequence, dec_sequence),
7481 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7482 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7483 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7484 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7485 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7486 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7487 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7488 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7489 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7490 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7491 PROC(BIND_CONN_TO_SESSION,
7492 enc_bind_conn_to_session, dec_bind_conn_to_session),
7493 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7494 #endif /* CONFIG_NFS_V4_1 */
7495 };
7496
7497 const struct rpc_version nfs_version4 = {
7498 .number = 4,
7499 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7500 .procs = nfs4_procedures
7501 };
7502
7503 /*
7504 * Local variables:
7505 * c-basic-offset: 8
7506 * End:
7507 */
Linux kernel - Deliverables
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