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block: blk-mq: support draining mq queue
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 + \
150 1024) /* large value for CLID_INUSE */
151 #define encode_setclientid_confirm_maxsz \
152 (op_encode_hdr_maxsz + \
153 3 + (NFS4_VERIFIER_SIZE >> 2))
154 #define decode_setclientid_confirm_maxsz \
155 (op_decode_hdr_maxsz)
156 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
157 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
158 #define encode_share_access_maxsz \
159 (2)
160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
161 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
163 #define encode_open_maxsz (op_encode_hdr_maxsz + \
164 2 + encode_share_access_maxsz + 2 + \
165 open_owner_id_maxsz + \
166 encode_opentype_maxsz + \
167 encode_claim_null_maxsz)
168 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
170 decode_ace_maxsz)
171 #define decode_change_info_maxsz (5)
172 #define decode_open_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz + \
174 decode_change_info_maxsz + 1 + \
175 nfs4_fattr_bitmap_maxsz + \
176 decode_delegation_maxsz)
177 #define encode_open_confirm_maxsz \
178 (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 1)
180 #define decode_open_confirm_maxsz \
181 (op_decode_hdr_maxsz + \
182 decode_stateid_maxsz)
183 #define encode_open_downgrade_maxsz \
184 (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 1 + \
186 encode_share_access_maxsz)
187 #define decode_open_downgrade_maxsz \
188 (op_decode_hdr_maxsz + \
189 decode_stateid_maxsz)
190 #define encode_close_maxsz (op_encode_hdr_maxsz + \
191 1 + encode_stateid_maxsz)
192 #define decode_close_maxsz (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + \
196 encode_attrs_maxsz)
197 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
198 nfs4_fattr_bitmap_maxsz)
199 #define encode_read_maxsz (op_encode_hdr_maxsz + \
200 encode_stateid_maxsz + 3)
201 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
202 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
203 2 + encode_verifier_maxsz + 5 + \
204 nfs4_label_maxsz)
205 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
206 decode_verifier_maxsz + \
207 nfs4_label_maxsz + nfs4_fattr_maxsz)
208 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
209 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
210 #define encode_write_maxsz (op_encode_hdr_maxsz + \
211 encode_stateid_maxsz + 4)
212 #define decode_write_maxsz (op_decode_hdr_maxsz + \
213 2 + decode_verifier_maxsz)
214 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
215 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
216 decode_verifier_maxsz)
217 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
218 nfs4_name_maxsz)
219 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
220 decode_change_info_maxsz)
221 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
222 2 * nfs4_name_maxsz)
223 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
224 decode_change_info_maxsz + \
225 decode_change_info_maxsz)
226 #define encode_link_maxsz (op_encode_hdr_maxsz + \
227 nfs4_name_maxsz)
228 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
229 #define encode_lockowner_maxsz (7)
230 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
231 7 + \
232 1 + encode_stateid_maxsz + 1 + \
233 encode_lockowner_maxsz)
234 #define decode_lock_denied_maxsz \
235 (8 + decode_lockowner_maxsz)
236 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
237 decode_lock_denied_maxsz)
238 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
239 encode_lockowner_maxsz)
240 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
241 decode_lock_denied_maxsz)
242 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
243 encode_stateid_maxsz + \
244 4)
245 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
246 decode_stateid_maxsz)
247 #define encode_release_lockowner_maxsz \
248 (op_encode_hdr_maxsz + \
249 encode_lockowner_maxsz)
250 #define decode_release_lockowner_maxsz \
251 (op_decode_hdr_maxsz)
252 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
253 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
254 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
255 1 + nfs4_name_maxsz + \
256 1 + \
257 nfs4_fattr_maxsz)
258 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
259 #define encode_create_maxsz (op_encode_hdr_maxsz + \
260 1 + 2 + nfs4_name_maxsz + \
261 encode_attrs_maxsz)
262 #define decode_create_maxsz (op_decode_hdr_maxsz + \
263 decode_change_info_maxsz + \
264 nfs4_fattr_bitmap_maxsz)
265 #define encode_statfs_maxsz (encode_getattr_maxsz)
266 #define decode_statfs_maxsz (decode_getattr_maxsz)
267 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
268 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
269 #define encode_getacl_maxsz (encode_getattr_maxsz)
270 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
271 nfs4_fattr_bitmap_maxsz + 1)
272 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
273 encode_stateid_maxsz + 3)
274 #define decode_setacl_maxsz (decode_setattr_maxsz)
275 #define encode_fs_locations_maxsz \
276 (encode_getattr_maxsz)
277 #define decode_fs_locations_maxsz \
278 (0)
279 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
280 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
281
282 #if defined(CONFIG_NFS_V4_1)
283 #define NFS4_MAX_MACHINE_NAME_LEN (64)
284 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
285 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
286
287 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
288 encode_verifier_maxsz + \
289 1 /* co_ownerid.len */ + \
290 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
291 1 /* flags */ + \
292 1 /* spa_how */ + \
293 /* max is SP4_MACH_CRED (for now) */ + \
294 1 + NFS4_OP_MAP_NUM_WORDS + \
295 1 + NFS4_OP_MAP_NUM_WORDS + \
296 1 /* implementation id array of size 1 */ + \
297 1 /* nii_domain */ + \
298 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
299 1 /* nii_name */ + \
300 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
301 3 /* nii_date */)
302 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
303 2 /* eir_clientid */ + \
304 1 /* eir_sequenceid */ + \
305 1 /* eir_flags */ + \
306 1 /* spr_how */ + \
307 /* max is SP4_MACH_CRED (for now) */ + \
308 1 + NFS4_OP_MAP_NUM_WORDS + \
309 1 + NFS4_OP_MAP_NUM_WORDS + \
310 2 /* eir_server_owner.so_minor_id */ + \
311 /* eir_server_owner.so_major_id<> */ \
312 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
313 /* eir_server_scope<> */ \
314 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
315 1 /* eir_server_impl_id array length */ + \
316 1 /* nii_domain */ + \
317 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
318 1 /* nii_name */ + \
319 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
320 3 /* nii_date */)
321 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
322 #define decode_channel_attrs_maxsz (6 + \
323 1 /* ca_rdma_ird.len */ + \
324 1 /* ca_rdma_ird */)
325 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
326 2 /* csa_clientid */ + \
327 1 /* csa_sequence */ + \
328 1 /* csa_flags */ + \
329 encode_channel_attrs_maxsz + \
330 encode_channel_attrs_maxsz + \
331 1 /* csa_cb_program */ + \
332 1 /* csa_sec_parms.len (1) */ + \
333 1 /* cb_secflavor (AUTH_SYS) */ + \
334 1 /* stamp */ + \
335 1 /* machinename.len */ + \
336 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
337 1 /* uid */ + \
338 1 /* gid */ + \
339 1 /* gids.len (0) */)
340 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
341 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
342 1 /* csr_sequence */ + \
343 1 /* csr_flags */ + \
344 decode_channel_attrs_maxsz + \
345 decode_channel_attrs_maxsz)
346 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
347 /* bctsa_sessid */ \
348 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
349 1 /* bctsa_dir */ + \
350 1 /* bctsa_use_conn_in_rdma_mode */)
351 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
352 /* bctsr_sessid */ \
353 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
354 1 /* bctsr_dir */ + \
355 1 /* bctsr_use_conn_in_rdma_mode */)
356 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
357 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
358 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
359 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
360 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
361 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
362 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
363 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
364 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
365 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
367 encode_verifier_maxsz)
368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
369 2 /* nfs_cookie4 gdlr_cookie */ + \
370 decode_verifier_maxsz \
371 /* verifier4 gdlr_verifier */ + \
372 1 /* gdlr_deviceid_list count */ + \
373 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
374 NFS4_DEVICEID4_SIZE) \
375 /* gdlr_deviceid_list */ + \
376 1 /* bool gdlr_eof */)
377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
378 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
380 1 /* layout type */ + \
381 1 /* opaque devaddr4 length */ + \
382 /* devaddr4 payload is read into page */ \
383 1 /* notification bitmap length */ + \
384 1 /* notification bitmap */)
385 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
386 encode_stateid_maxsz)
387 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
388 decode_stateid_maxsz + \
389 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
391 2 /* offset */ + \
392 2 /* length */ + \
393 1 /* reclaim */ + \
394 encode_stateid_maxsz + \
395 1 /* new offset (true) */ + \
396 2 /* last byte written */ + \
397 1 /* nt_timechanged (false) */ + \
398 1 /* layoutupdate4 layout type */ + \
399 1 /* NULL filelayout layoutupdate4 payload */)
400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
402 encode_stateid_maxsz + \
403 1 /* FIXME: opaque lrf_body always empty at the moment */)
404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
405 1 + decode_stateid_maxsz)
406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
408 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
409 XDR_QUADLEN(NFS4_STATEID_SIZE))
410 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
411 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
412 XDR_QUADLEN(NFS4_STATEID_SIZE))
413 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
414 #else /* CONFIG_NFS_V4_1 */
415 #define encode_sequence_maxsz 0
416 #define decode_sequence_maxsz 0
417 #endif /* CONFIG_NFS_V4_1 */
418
419 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
420 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
421 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
422 encode_sequence_maxsz + \
423 encode_putfh_maxsz + \
424 encode_read_maxsz)
425 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
426 decode_sequence_maxsz + \
427 decode_putfh_maxsz + \
428 decode_read_maxsz)
429 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
430 encode_sequence_maxsz + \
431 encode_putfh_maxsz + \
432 encode_readlink_maxsz)
433 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_readlink_maxsz)
437 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
438 encode_sequence_maxsz + \
439 encode_putfh_maxsz + \
440 encode_readdir_maxsz)
441 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_readdir_maxsz)
445 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
446 encode_sequence_maxsz + \
447 encode_putfh_maxsz + \
448 encode_write_maxsz + \
449 encode_getattr_maxsz)
450 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
451 decode_sequence_maxsz + \
452 decode_putfh_maxsz + \
453 decode_write_maxsz + \
454 decode_getattr_maxsz)
455 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_commit_maxsz)
459 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
460 decode_sequence_maxsz + \
461 decode_putfh_maxsz + \
462 decode_commit_maxsz)
463 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_open_maxsz + \
467 encode_access_maxsz + \
468 encode_getfh_maxsz + \
469 encode_getattr_maxsz)
470 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_open_maxsz + \
474 decode_access_maxsz + \
475 decode_getfh_maxsz + \
476 decode_getattr_maxsz)
477 #define NFS4_enc_open_confirm_sz \
478 (compound_encode_hdr_maxsz + \
479 encode_putfh_maxsz + \
480 encode_open_confirm_maxsz)
481 #define NFS4_dec_open_confirm_sz \
482 (compound_decode_hdr_maxsz + \
483 decode_putfh_maxsz + \
484 decode_open_confirm_maxsz)
485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
486 encode_sequence_maxsz + \
487 encode_putfh_maxsz + \
488 encode_open_maxsz + \
489 encode_access_maxsz + \
490 encode_getattr_maxsz)
491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getattr_maxsz)
497 #define NFS4_enc_open_downgrade_sz \
498 (compound_encode_hdr_maxsz + \
499 encode_sequence_maxsz + \
500 encode_putfh_maxsz + \
501 encode_open_downgrade_maxsz + \
502 encode_getattr_maxsz)
503 #define NFS4_dec_open_downgrade_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_sequence_maxsz + \
506 decode_putfh_maxsz + \
507 decode_open_downgrade_maxsz + \
508 decode_getattr_maxsz)
509 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
510 encode_sequence_maxsz + \
511 encode_putfh_maxsz + \
512 encode_close_maxsz + \
513 encode_getattr_maxsz)
514 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_close_maxsz + \
518 decode_getattr_maxsz)
519 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
520 encode_sequence_maxsz + \
521 encode_putfh_maxsz + \
522 encode_setattr_maxsz + \
523 encode_getattr_maxsz)
524 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
525 decode_sequence_maxsz + \
526 decode_putfh_maxsz + \
527 decode_setattr_maxsz + \
528 decode_getattr_maxsz)
529 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
530 encode_sequence_maxsz + \
531 encode_putfh_maxsz + \
532 encode_fsinfo_maxsz)
533 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
534 decode_sequence_maxsz + \
535 decode_putfh_maxsz + \
536 decode_fsinfo_maxsz)
537 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
538 encode_renew_maxsz)
539 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
540 decode_renew_maxsz)
541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
542 encode_setclientid_maxsz)
543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
544 decode_setclientid_maxsz)
545 #define NFS4_enc_setclientid_confirm_sz \
546 (compound_encode_hdr_maxsz + \
547 encode_setclientid_confirm_maxsz)
548 #define NFS4_dec_setclientid_confirm_sz \
549 (compound_decode_hdr_maxsz + \
550 decode_setclientid_confirm_maxsz)
551 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
552 encode_sequence_maxsz + \
553 encode_putfh_maxsz + \
554 encode_lock_maxsz)
555 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
556 decode_sequence_maxsz + \
557 decode_putfh_maxsz + \
558 decode_lock_maxsz)
559 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
560 encode_sequence_maxsz + \
561 encode_putfh_maxsz + \
562 encode_lockt_maxsz)
563 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
564 decode_sequence_maxsz + \
565 decode_putfh_maxsz + \
566 decode_lockt_maxsz)
567 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_locku_maxsz)
571 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
572 decode_sequence_maxsz + \
573 decode_putfh_maxsz + \
574 decode_locku_maxsz)
575 #define NFS4_enc_release_lockowner_sz \
576 (compound_encode_hdr_maxsz + \
577 encode_lockowner_maxsz)
578 #define NFS4_dec_release_lockowner_sz \
579 (compound_decode_hdr_maxsz + \
580 decode_lockowner_maxsz)
581 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
582 encode_sequence_maxsz + \
583 encode_putfh_maxsz + \
584 encode_access_maxsz + \
585 encode_getattr_maxsz)
586 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
587 decode_sequence_maxsz + \
588 decode_putfh_maxsz + \
589 decode_access_maxsz + \
590 decode_getattr_maxsz)
591 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_getattr_maxsz + \
595 encode_renew_maxsz)
596 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
597 decode_sequence_maxsz + \
598 decode_putfh_maxsz + \
599 decode_getattr_maxsz + \
600 decode_renew_maxsz)
601 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
602 encode_sequence_maxsz + \
603 encode_putfh_maxsz + \
604 encode_lookup_maxsz + \
605 encode_getattr_maxsz + \
606 encode_getfh_maxsz)
607 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
608 decode_sequence_maxsz + \
609 decode_putfh_maxsz + \
610 decode_lookup_maxsz + \
611 decode_getattr_maxsz + \
612 decode_getfh_maxsz)
613 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
614 encode_sequence_maxsz + \
615 encode_putrootfh_maxsz + \
616 encode_getattr_maxsz + \
617 encode_getfh_maxsz)
618 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
619 decode_sequence_maxsz + \
620 decode_putrootfh_maxsz + \
621 decode_getattr_maxsz + \
622 decode_getfh_maxsz)
623 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_remove_maxsz)
627 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
628 decode_sequence_maxsz + \
629 decode_putfh_maxsz + \
630 decode_remove_maxsz)
631 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
632 encode_sequence_maxsz + \
633 encode_putfh_maxsz + \
634 encode_savefh_maxsz + \
635 encode_putfh_maxsz + \
636 encode_rename_maxsz)
637 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
638 decode_sequence_maxsz + \
639 decode_putfh_maxsz + \
640 decode_savefh_maxsz + \
641 decode_putfh_maxsz + \
642 decode_rename_maxsz)
643 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
644 encode_sequence_maxsz + \
645 encode_putfh_maxsz + \
646 encode_savefh_maxsz + \
647 encode_putfh_maxsz + \
648 encode_link_maxsz + \
649 encode_restorefh_maxsz + \
650 encode_getattr_maxsz)
651 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
652 decode_sequence_maxsz + \
653 decode_putfh_maxsz + \
654 decode_savefh_maxsz + \
655 decode_putfh_maxsz + \
656 decode_link_maxsz + \
657 decode_restorefh_maxsz + \
658 decode_getattr_maxsz)
659 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
660 encode_sequence_maxsz + \
661 encode_putfh_maxsz + \
662 encode_symlink_maxsz + \
663 encode_getattr_maxsz + \
664 encode_getfh_maxsz)
665 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
666 decode_sequence_maxsz + \
667 decode_putfh_maxsz + \
668 decode_symlink_maxsz + \
669 decode_getattr_maxsz + \
670 decode_getfh_maxsz)
671 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
672 encode_sequence_maxsz + \
673 encode_putfh_maxsz + \
674 encode_create_maxsz + \
675 encode_getfh_maxsz + \
676 encode_getattr_maxsz)
677 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
678 decode_sequence_maxsz + \
679 decode_putfh_maxsz + \
680 decode_create_maxsz + \
681 decode_getfh_maxsz + \
682 decode_getattr_maxsz)
683 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
684 encode_sequence_maxsz + \
685 encode_putfh_maxsz + \
686 encode_getattr_maxsz)
687 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
688 decode_sequence_maxsz + \
689 decode_putfh_maxsz + \
690 decode_getattr_maxsz)
691 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
692 encode_sequence_maxsz + \
693 encode_putfh_maxsz + \
694 encode_statfs_maxsz)
695 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
696 decode_sequence_maxsz + \
697 decode_putfh_maxsz + \
698 decode_statfs_maxsz)
699 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
700 encode_sequence_maxsz + \
701 encode_putfh_maxsz + \
702 encode_getattr_maxsz)
703 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_getattr_maxsz)
707 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
708 encode_sequence_maxsz + \
709 encode_putfh_maxsz + \
710 encode_delegreturn_maxsz + \
711 encode_getattr_maxsz)
712 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
713 decode_sequence_maxsz + \
714 decode_delegreturn_maxsz + \
715 decode_getattr_maxsz)
716 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
717 encode_sequence_maxsz + \
718 encode_putfh_maxsz + \
719 encode_getacl_maxsz)
720 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
721 decode_sequence_maxsz + \
722 decode_putfh_maxsz + \
723 decode_getacl_maxsz)
724 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
725 encode_sequence_maxsz + \
726 encode_putfh_maxsz + \
727 encode_setacl_maxsz)
728 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
729 decode_sequence_maxsz + \
730 decode_putfh_maxsz + \
731 decode_setacl_maxsz)
732 #define NFS4_enc_fs_locations_sz \
733 (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_putfh_maxsz + \
736 encode_lookup_maxsz + \
737 encode_fs_locations_maxsz + \
738 encode_renew_maxsz)
739 #define NFS4_dec_fs_locations_sz \
740 (compound_decode_hdr_maxsz + \
741 decode_sequence_maxsz + \
742 decode_putfh_maxsz + \
743 decode_lookup_maxsz + \
744 decode_fs_locations_maxsz + \
745 decode_renew_maxsz)
746 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
747 encode_sequence_maxsz + \
748 encode_putfh_maxsz + \
749 encode_secinfo_maxsz)
750 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
751 decode_sequence_maxsz + \
752 decode_putfh_maxsz + \
753 decode_secinfo_maxsz)
754 #define NFS4_enc_fsid_present_sz \
755 (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_getfh_maxsz + \
759 encode_renew_maxsz)
760 #define NFS4_dec_fsid_present_sz \
761 (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_getfh_maxsz + \
765 decode_renew_maxsz)
766 #if defined(CONFIG_NFS_V4_1)
767 #define NFS4_enc_bind_conn_to_session_sz \
768 (compound_encode_hdr_maxsz + \
769 encode_bind_conn_to_session_maxsz)
770 #define NFS4_dec_bind_conn_to_session_sz \
771 (compound_decode_hdr_maxsz + \
772 decode_bind_conn_to_session_maxsz)
773 #define NFS4_enc_exchange_id_sz \
774 (compound_encode_hdr_maxsz + \
775 encode_exchange_id_maxsz)
776 #define NFS4_dec_exchange_id_sz \
777 (compound_decode_hdr_maxsz + \
778 decode_exchange_id_maxsz)
779 #define NFS4_enc_create_session_sz \
780 (compound_encode_hdr_maxsz + \
781 encode_create_session_maxsz)
782 #define NFS4_dec_create_session_sz \
783 (compound_decode_hdr_maxsz + \
784 decode_create_session_maxsz)
785 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
786 encode_destroy_session_maxsz)
787 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
788 decode_destroy_session_maxsz)
789 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
790 encode_destroy_clientid_maxsz)
791 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
792 decode_destroy_clientid_maxsz)
793 #define NFS4_enc_sequence_sz \
794 (compound_decode_hdr_maxsz + \
795 encode_sequence_maxsz)
796 #define NFS4_dec_sequence_sz \
797 (compound_decode_hdr_maxsz + \
798 decode_sequence_maxsz)
799 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
800 encode_sequence_maxsz + \
801 encode_putrootfh_maxsz + \
802 encode_fsinfo_maxsz)
803 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
804 decode_sequence_maxsz + \
805 decode_putrootfh_maxsz + \
806 decode_fsinfo_maxsz)
807 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
808 encode_sequence_maxsz + \
809 encode_reclaim_complete_maxsz)
810 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
811 decode_sequence_maxsz + \
812 decode_reclaim_complete_maxsz)
813 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
814 encode_sequence_maxsz + \
815 encode_putfh_maxsz + \
816 encode_getdevicelist_maxsz)
817 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
818 decode_sequence_maxsz + \
819 decode_putfh_maxsz + \
820 decode_getdevicelist_maxsz)
821 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
822 encode_sequence_maxsz +\
823 encode_getdeviceinfo_maxsz)
824 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_getdeviceinfo_maxsz)
827 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
828 encode_sequence_maxsz + \
829 encode_putfh_maxsz + \
830 encode_layoutget_maxsz)
831 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
832 decode_sequence_maxsz + \
833 decode_putfh_maxsz + \
834 decode_layoutget_maxsz)
835 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
836 encode_sequence_maxsz +\
837 encode_putfh_maxsz + \
838 encode_layoutcommit_maxsz + \
839 encode_getattr_maxsz)
840 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
841 decode_sequence_maxsz + \
842 decode_putfh_maxsz + \
843 decode_layoutcommit_maxsz + \
844 decode_getattr_maxsz)
845 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
846 encode_sequence_maxsz + \
847 encode_putfh_maxsz + \
848 encode_layoutreturn_maxsz)
849 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
850 decode_sequence_maxsz + \
851 decode_putfh_maxsz + \
852 decode_layoutreturn_maxsz)
853 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
854 encode_sequence_maxsz + \
855 encode_putrootfh_maxsz +\
856 encode_secinfo_no_name_maxsz)
857 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_putrootfh_maxsz + \
860 decode_secinfo_no_name_maxsz)
861 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
862 encode_sequence_maxsz + \
863 encode_test_stateid_maxsz)
864 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
865 decode_sequence_maxsz + \
866 decode_test_stateid_maxsz)
867 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
868 encode_sequence_maxsz + \
869 encode_free_stateid_maxsz)
870 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
871 decode_sequence_maxsz + \
872 decode_free_stateid_maxsz)
873
874 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
875 compound_encode_hdr_maxsz +
876 encode_sequence_maxsz +
877 encode_putfh_maxsz +
878 encode_getattr_maxsz) *
879 XDR_UNIT);
880
881 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
882 compound_decode_hdr_maxsz +
883 decode_sequence_maxsz +
884 decode_putfh_maxsz) *
885 XDR_UNIT);
886
887 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
888 compound_decode_hdr_maxsz +
889 decode_sequence_maxsz) *
890 XDR_UNIT);
891 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
892 #endif /* CONFIG_NFS_V4_1 */
893
894 static const umode_t nfs_type2fmt[] = {
895 [NF4BAD] = 0,
896 [NF4REG] = S_IFREG,
897 [NF4DIR] = S_IFDIR,
898 [NF4BLK] = S_IFBLK,
899 [NF4CHR] = S_IFCHR,
900 [NF4LNK] = S_IFLNK,
901 [NF4SOCK] = S_IFSOCK,
902 [NF4FIFO] = S_IFIFO,
903 [NF4ATTRDIR] = 0,
904 [NF4NAMEDATTR] = 0,
905 };
906
907 struct compound_hdr {
908 int32_t status;
909 uint32_t nops;
910 __be32 * nops_p;
911 uint32_t taglen;
912 char * tag;
913 uint32_t replen; /* expected reply words */
914 u32 minorversion;
915 };
916
917 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
918 {
919 __be32 *p = xdr_reserve_space(xdr, nbytes);
920 BUG_ON(!p);
921 return p;
922 }
923
924 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
925 {
926 __be32 *p;
927
928 p = xdr_reserve_space(xdr, len);
929 xdr_encode_opaque_fixed(p, buf, len);
930 }
931
932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
933 {
934 __be32 *p;
935
936 p = reserve_space(xdr, 4 + len);
937 xdr_encode_opaque(p, str, len);
938 }
939
940 static void encode_uint32(struct xdr_stream *xdr, u32 n)
941 {
942 __be32 *p;
943
944 p = reserve_space(xdr, 4);
945 *p = cpu_to_be32(n);
946 }
947
948 static void encode_uint64(struct xdr_stream *xdr, u64 n)
949 {
950 __be32 *p;
951
952 p = reserve_space(xdr, 8);
953 xdr_encode_hyper(p, n);
954 }
955
956 static void encode_nfs4_seqid(struct xdr_stream *xdr,
957 const struct nfs_seqid *seqid)
958 {
959 encode_uint32(xdr, seqid->sequence->counter);
960 }
961
962 static void encode_compound_hdr(struct xdr_stream *xdr,
963 struct rpc_rqst *req,
964 struct compound_hdr *hdr)
965 {
966 __be32 *p;
967 struct rpc_auth *auth = req->rq_cred->cr_auth;
968
969 /* initialize running count of expected bytes in reply.
970 * NOTE: the replied tag SHOULD be the same is the one sent,
971 * but this is not required as a MUST for the server to do so. */
972 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
973
974 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
975 encode_string(xdr, hdr->taglen, hdr->tag);
976 p = reserve_space(xdr, 8);
977 *p++ = cpu_to_be32(hdr->minorversion);
978 hdr->nops_p = p;
979 *p = cpu_to_be32(hdr->nops);
980 }
981
982 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
983 uint32_t replen,
984 struct compound_hdr *hdr)
985 {
986 encode_uint32(xdr, op);
987 hdr->nops++;
988 hdr->replen += replen;
989 }
990
991 static void encode_nops(struct compound_hdr *hdr)
992 {
993 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
994 *hdr->nops_p = htonl(hdr->nops);
995 }
996
997 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
998 {
999 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1000 }
1001
1002 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1003 {
1004 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1005 }
1006
1007 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1008 const struct nfs4_label *label,
1009 const struct nfs_server *server)
1010 {
1011 char owner_name[IDMAP_NAMESZ];
1012 char owner_group[IDMAP_NAMESZ];
1013 int owner_namelen = 0;
1014 int owner_grouplen = 0;
1015 __be32 *p;
1016 unsigned i;
1017 uint32_t len = 0;
1018 uint32_t bmval_len;
1019 uint32_t bmval[3] = { 0 };
1020
1021 /*
1022 * We reserve enough space to write the entire attribute buffer at once.
1023 * In the worst-case, this would be
1024 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1025 * = 40 bytes, plus any contribution from variable-length fields
1026 * such as owner/group.
1027 */
1028 if (iap->ia_valid & ATTR_SIZE) {
1029 bmval[0] |= FATTR4_WORD0_SIZE;
1030 len += 8;
1031 }
1032 if (iap->ia_valid & ATTR_MODE) {
1033 bmval[1] |= FATTR4_WORD1_MODE;
1034 len += 4;
1035 }
1036 if (iap->ia_valid & ATTR_UID) {
1037 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1038 if (owner_namelen < 0) {
1039 dprintk("nfs: couldn't resolve uid %d to string\n",
1040 from_kuid(&init_user_ns, iap->ia_uid));
1041 /* XXX */
1042 strcpy(owner_name, "nobody");
1043 owner_namelen = sizeof("nobody") - 1;
1044 /* goto out; */
1045 }
1046 bmval[1] |= FATTR4_WORD1_OWNER;
1047 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1048 }
1049 if (iap->ia_valid & ATTR_GID) {
1050 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1051 if (owner_grouplen < 0) {
1052 dprintk("nfs: couldn't resolve gid %d to string\n",
1053 from_kgid(&init_user_ns, iap->ia_gid));
1054 strcpy(owner_group, "nobody");
1055 owner_grouplen = sizeof("nobody") - 1;
1056 /* goto out; */
1057 }
1058 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1059 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1060 }
1061 if (iap->ia_valid & ATTR_ATIME_SET) {
1062 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063 len += 16;
1064 } else if (iap->ia_valid & ATTR_ATIME) {
1065 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1066 len += 4;
1067 }
1068 if (iap->ia_valid & ATTR_MTIME_SET) {
1069 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070 len += 16;
1071 } else if (iap->ia_valid & ATTR_MTIME) {
1072 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1073 len += 4;
1074 }
1075 if (label) {
1076 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1077 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1078 }
1079
1080 if (bmval[2] != 0)
1081 bmval_len = 3;
1082 else if (bmval[1] != 0)
1083 bmval_len = 2;
1084 else
1085 bmval_len = 1;
1086
1087 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1088
1089 *p++ = cpu_to_be32(bmval_len);
1090 for (i = 0; i < bmval_len; i++)
1091 *p++ = cpu_to_be32(bmval[i]);
1092 *p++ = cpu_to_be32(len);
1093
1094 if (bmval[0] & FATTR4_WORD0_SIZE)
1095 p = xdr_encode_hyper(p, iap->ia_size);
1096 if (bmval[1] & FATTR4_WORD1_MODE)
1097 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1098 if (bmval[1] & FATTR4_WORD1_OWNER)
1099 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1100 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1101 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1102 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1103 if (iap->ia_valid & ATTR_ATIME_SET) {
1104 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1105 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1106 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1107 } else
1108 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1109 }
1110 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1111 if (iap->ia_valid & ATTR_MTIME_SET) {
1112 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1114 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1115 } else
1116 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117 }
1118 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1119 *p++ = cpu_to_be32(label->lfs);
1120 *p++ = cpu_to_be32(label->pi);
1121 *p++ = cpu_to_be32(label->len);
1122 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1123 }
1124
1125 /* out: */
1126 }
1127
1128 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1129 {
1130 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1131 encode_uint32(xdr, access);
1132 }
1133
1134 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1135 {
1136 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1137 encode_nfs4_seqid(xdr, arg->seqid);
1138 encode_nfs4_stateid(xdr, arg->stateid);
1139 }
1140
1141 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1142 {
1143 __be32 *p;
1144
1145 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1146 p = reserve_space(xdr, 12);
1147 p = xdr_encode_hyper(p, args->offset);
1148 *p = cpu_to_be32(args->count);
1149 }
1150
1151 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1152 {
1153 __be32 *p;
1154
1155 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1156 encode_uint32(xdr, create->ftype);
1157
1158 switch (create->ftype) {
1159 case NF4LNK:
1160 p = reserve_space(xdr, 4);
1161 *p = cpu_to_be32(create->u.symlink.len);
1162 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1163 break;
1164
1165 case NF4BLK: case NF4CHR:
1166 p = reserve_space(xdr, 8);
1167 *p++ = cpu_to_be32(create->u.device.specdata1);
1168 *p = cpu_to_be32(create->u.device.specdata2);
1169 break;
1170
1171 default:
1172 break;
1173 }
1174
1175 encode_string(xdr, create->name->len, create->name->name);
1176 encode_attrs(xdr, create->attrs, create->label, create->server);
1177 }
1178
1179 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1180 {
1181 __be32 *p;
1182
1183 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1184 p = reserve_space(xdr, 8);
1185 *p++ = cpu_to_be32(1);
1186 *p = cpu_to_be32(bitmap);
1187 }
1188
1189 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1190 {
1191 __be32 *p;
1192
1193 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194 p = reserve_space(xdr, 12);
1195 *p++ = cpu_to_be32(2);
1196 *p++ = cpu_to_be32(bm0);
1197 *p = cpu_to_be32(bm1);
1198 }
1199
1200 static void
1201 encode_getattr_three(struct xdr_stream *xdr,
1202 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1203 struct compound_hdr *hdr)
1204 {
1205 __be32 *p;
1206
1207 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208 if (bm2) {
1209 p = reserve_space(xdr, 16);
1210 *p++ = cpu_to_be32(3);
1211 *p++ = cpu_to_be32(bm0);
1212 *p++ = cpu_to_be32(bm1);
1213 *p = cpu_to_be32(bm2);
1214 } else if (bm1) {
1215 p = reserve_space(xdr, 12);
1216 *p++ = cpu_to_be32(2);
1217 *p++ = cpu_to_be32(bm0);
1218 *p = cpu_to_be32(bm1);
1219 } else {
1220 p = reserve_space(xdr, 8);
1221 *p++ = cpu_to_be32(1);
1222 *p = cpu_to_be32(bm0);
1223 }
1224 }
1225
1226 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1227 {
1228 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1229 bitmask[1] & nfs4_fattr_bitmap[1],
1230 bitmask[2] & nfs4_fattr_bitmap[2],
1231 hdr);
1232 }
1233
1234 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1235 const u32 *open_bitmap,
1236 struct compound_hdr *hdr)
1237 {
1238 encode_getattr_three(xdr,
1239 bitmask[0] & open_bitmap[0],
1240 bitmask[1] & open_bitmap[1],
1241 bitmask[2] & open_bitmap[2],
1242 hdr);
1243 }
1244
1245 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1246 {
1247 encode_getattr_three(xdr,
1248 bitmask[0] & nfs4_fsinfo_bitmap[0],
1249 bitmask[1] & nfs4_fsinfo_bitmap[1],
1250 bitmask[2] & nfs4_fsinfo_bitmap[2],
1251 hdr);
1252 }
1253
1254 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1255 {
1256 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1257 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1258 }
1259
1260 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1261 {
1262 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1263 }
1264
1265 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1266 {
1267 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1268 encode_string(xdr, name->len, name->name);
1269 }
1270
1271 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1272 {
1273 if (fl->fl_type == F_RDLCK)
1274 return block ? NFS4_READW_LT : NFS4_READ_LT;
1275 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1276 }
1277
1278 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1279 {
1280 if (fl->fl_end == OFFSET_MAX)
1281 return ~(uint64_t)0;
1282 return fl->fl_end - fl->fl_start + 1;
1283 }
1284
1285 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1286 {
1287 __be32 *p;
1288
1289 p = reserve_space(xdr, 32);
1290 p = xdr_encode_hyper(p, lowner->clientid);
1291 *p++ = cpu_to_be32(20);
1292 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1293 *p++ = cpu_to_be32(lowner->s_dev);
1294 xdr_encode_hyper(p, lowner->id);
1295 }
1296
1297 /*
1298 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1299 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1300 */
1301 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1302 {
1303 __be32 *p;
1304
1305 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1306 p = reserve_space(xdr, 28);
1307 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1308 *p++ = cpu_to_be32(args->reclaim);
1309 p = xdr_encode_hyper(p, args->fl->fl_start);
1310 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311 *p = cpu_to_be32(args->new_lock_owner);
1312 if (args->new_lock_owner){
1313 encode_nfs4_seqid(xdr, args->open_seqid);
1314 encode_nfs4_stateid(xdr, args->open_stateid);
1315 encode_nfs4_seqid(xdr, args->lock_seqid);
1316 encode_lockowner(xdr, &args->lock_owner);
1317 }
1318 else {
1319 encode_nfs4_stateid(xdr, args->lock_stateid);
1320 encode_nfs4_seqid(xdr, args->lock_seqid);
1321 }
1322 }
1323
1324 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1329 p = reserve_space(xdr, 20);
1330 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1331 p = xdr_encode_hyper(p, args->fl->fl_start);
1332 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1333 encode_lockowner(xdr, &args->lock_owner);
1334 }
1335
1336 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1337 {
1338 __be32 *p;
1339
1340 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1341 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1342 encode_nfs4_seqid(xdr, args->seqid);
1343 encode_nfs4_stateid(xdr, args->stateid);
1344 p = reserve_space(xdr, 16);
1345 p = xdr_encode_hyper(p, args->fl->fl_start);
1346 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1347 }
1348
1349 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1350 {
1351 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1352 encode_lockowner(xdr, lowner);
1353 }
1354
1355 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1356 {
1357 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1358 encode_string(xdr, name->len, name->name);
1359 }
1360
1361 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1362 {
1363 __be32 *p;
1364
1365 p = reserve_space(xdr, 8);
1366 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1367 case FMODE_READ:
1368 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1369 break;
1370 case FMODE_WRITE:
1371 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1372 break;
1373 case FMODE_READ|FMODE_WRITE:
1374 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1375 break;
1376 default:
1377 *p++ = cpu_to_be32(0);
1378 }
1379 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1380 }
1381
1382 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1383 {
1384 __be32 *p;
1385 /*
1386 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1387 * owner 4 = 32
1388 */
1389 encode_nfs4_seqid(xdr, arg->seqid);
1390 encode_share_access(xdr, arg->fmode);
1391 p = reserve_space(xdr, 36);
1392 p = xdr_encode_hyper(p, arg->clientid);
1393 *p++ = cpu_to_be32(24);
1394 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1395 *p++ = cpu_to_be32(arg->server->s_dev);
1396 *p++ = cpu_to_be32(arg->id.uniquifier);
1397 xdr_encode_hyper(p, arg->id.create_time);
1398 }
1399
1400 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1401 {
1402 struct iattr dummy;
1403 __be32 *p;
1404
1405 p = reserve_space(xdr, 4);
1406 switch(arg->createmode) {
1407 case NFS4_CREATE_UNCHECKED:
1408 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1410 break;
1411 case NFS4_CREATE_GUARDED:
1412 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1413 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1414 break;
1415 case NFS4_CREATE_EXCLUSIVE:
1416 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1417 encode_nfs4_verifier(xdr, &arg->u.verifier);
1418 break;
1419 case NFS4_CREATE_EXCLUSIVE4_1:
1420 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1421 encode_nfs4_verifier(xdr, &arg->u.verifier);
1422 dummy.ia_valid = 0;
1423 encode_attrs(xdr, &dummy, arg->label, arg->server);
1424 }
1425 }
1426
1427 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1428 {
1429 __be32 *p;
1430
1431 p = reserve_space(xdr, 4);
1432 switch (arg->open_flags & O_CREAT) {
1433 case 0:
1434 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1435 break;
1436 default:
1437 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1438 encode_createmode(xdr, arg);
1439 }
1440 }
1441
1442 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1443 {
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 switch (delegation_type) {
1448 case 0:
1449 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1450 break;
1451 case FMODE_READ:
1452 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1453 break;
1454 case FMODE_WRITE|FMODE_READ:
1455 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1456 break;
1457 default:
1458 BUG();
1459 }
1460 }
1461
1462 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1463 {
1464 __be32 *p;
1465
1466 p = reserve_space(xdr, 4);
1467 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1468 encode_string(xdr, name->len, name->name);
1469 }
1470
1471 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1472 {
1473 __be32 *p;
1474
1475 p = reserve_space(xdr, 4);
1476 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1477 encode_delegation_type(xdr, type);
1478 }
1479
1480 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1486 encode_nfs4_stateid(xdr, stateid);
1487 encode_string(xdr, name->len, name->name);
1488 }
1489
1490 static inline void encode_claim_fh(struct xdr_stream *xdr)
1491 {
1492 __be32 *p;
1493
1494 p = reserve_space(xdr, 4);
1495 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1496 }
1497
1498 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1499 {
1500 __be32 *p;
1501
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1504 encode_nfs4_stateid(xdr, stateid);
1505 }
1506
1507 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1508 {
1509 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1510 encode_openhdr(xdr, arg);
1511 encode_opentype(xdr, arg);
1512 switch (arg->claim) {
1513 case NFS4_OPEN_CLAIM_NULL:
1514 encode_claim_null(xdr, arg->name);
1515 break;
1516 case NFS4_OPEN_CLAIM_PREVIOUS:
1517 encode_claim_previous(xdr, arg->u.delegation_type);
1518 break;
1519 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1520 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1521 break;
1522 case NFS4_OPEN_CLAIM_FH:
1523 encode_claim_fh(xdr);
1524 break;
1525 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1526 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1527 break;
1528 default:
1529 BUG();
1530 }
1531 }
1532
1533 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1534 {
1535 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1536 encode_nfs4_stateid(xdr, arg->stateid);
1537 encode_nfs4_seqid(xdr, arg->seqid);
1538 }
1539
1540 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1541 {
1542 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1543 encode_nfs4_stateid(xdr, arg->stateid);
1544 encode_nfs4_seqid(xdr, arg->seqid);
1545 encode_share_access(xdr, arg->fmode);
1546 }
1547
1548 static void
1549 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1550 {
1551 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1552 encode_string(xdr, fh->size, fh->data);
1553 }
1554
1555 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1556 {
1557 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1558 }
1559
1560 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1561 {
1562 __be32 *p;
1563
1564 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565 encode_nfs4_stateid(xdr, &args->stateid);
1566
1567 p = reserve_space(xdr, 12);
1568 p = xdr_encode_hyper(p, args->offset);
1569 *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574 uint32_t attrs[3] = {
1575 FATTR4_WORD0_RDATTR_ERROR,
1576 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577 };
1578 uint32_t dircount = readdir->count >> 1;
1579 __be32 *p, verf[2];
1580 uint32_t attrlen = 0;
1581 unsigned int i;
1582
1583 if (readdir->plus) {
1584 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591 dircount >>= 1;
1592 }
1593 /* Use mounted_on_fileid only if the server supports it */
1594 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595 attrs[0] |= FATTR4_WORD0_FILEID;
1596 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597 attrs[i] &= readdir->bitmask[i];
1598 if (attrs[i] != 0)
1599 attrlen = i+1;
1600 }
1601
1602 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603 encode_uint64(xdr, readdir->cookie);
1604 encode_nfs4_verifier(xdr, &readdir->verifier);
1605 p = reserve_space(xdr, 12 + (attrlen << 2));
1606 *p++ = cpu_to_be32(dircount);
1607 *p++ = cpu_to_be32(readdir->count);
1608 *p++ = cpu_to_be32(attrlen);
1609 for (i = 0; i < attrlen; i++)
1610 *p++ = cpu_to_be32(attrs[i]);
1611 memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614 __func__,
1615 (unsigned long long)readdir->cookie,
1616 verf[0], verf[1],
1617 attrs[0] & readdir->bitmask[0],
1618 attrs[1] & readdir->bitmask[1],
1619 attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630 encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636 encode_string(xdr, oldname->len, oldname->name);
1637 encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641 struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644 encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656 __be32 *p;
1657
1658 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659 encode_nfs4_stateid(xdr, &zero_stateid);
1660 p = reserve_space(xdr, 2*4);
1661 *p++ = cpu_to_be32(1);
1662 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663 p = reserve_space(xdr, 4);
1664 *p = cpu_to_be32(arg->acl_len);
1665 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677 encode_nfs4_stateid(xdr, &arg->stateid);
1678 encode_attrs(xdr, arg->iap, arg->label, server);
1679 }
1680
1681 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1682 {
1683 __be32 *p;
1684
1685 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1686 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1687
1688 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1689 p = reserve_space(xdr, 4);
1690 *p = cpu_to_be32(setclientid->sc_prog);
1691 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1692 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1693 p = reserve_space(xdr, 4);
1694 *p = cpu_to_be32(setclientid->sc_cb_ident);
1695 }
1696
1697 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1698 {
1699 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1700 decode_setclientid_confirm_maxsz, hdr);
1701 encode_uint64(xdr, arg->clientid);
1702 encode_nfs4_verifier(xdr, &arg->confirm);
1703 }
1704
1705 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1706 {
1707 __be32 *p;
1708
1709 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1710 encode_nfs4_stateid(xdr, &args->stateid);
1711
1712 p = reserve_space(xdr, 16);
1713 p = xdr_encode_hyper(p, args->offset);
1714 *p++ = cpu_to_be32(args->stable);
1715 *p = cpu_to_be32(args->count);
1716
1717 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1718 }
1719
1720 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1721 {
1722 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1723 encode_nfs4_stateid(xdr, stateid);
1724 }
1725
1726 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1727 {
1728 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1729 encode_string(xdr, name->len, name->name);
1730 }
1731
1732 #if defined(CONFIG_NFS_V4_1)
1733 /* NFSv4.1 operations */
1734 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1735 struct nfs4_session *session,
1736 struct compound_hdr *hdr)
1737 {
1738 __be32 *p;
1739
1740 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1741 decode_bind_conn_to_session_maxsz, hdr);
1742 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1743 p = xdr_reserve_space(xdr, 8);
1744 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1745 *p = 0; /* use_conn_in_rdma_mode = False */
1746 }
1747
1748 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1749 {
1750 unsigned int i;
1751 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1752 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1753 encode_uint32(xdr, op_map->u.words[i]);
1754 }
1755
1756 static void encode_exchange_id(struct xdr_stream *xdr,
1757 struct nfs41_exchange_id_args *args,
1758 struct compound_hdr *hdr)
1759 {
1760 __be32 *p;
1761 char impl_name[IMPL_NAME_LIMIT];
1762 int len = 0;
1763
1764 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1765 encode_nfs4_verifier(xdr, args->verifier);
1766
1767 encode_string(xdr, args->id_len, args->id);
1768
1769 encode_uint32(xdr, args->flags);
1770 encode_uint32(xdr, args->state_protect.how);
1771
1772 switch (args->state_protect.how) {
1773 case SP4_NONE:
1774 break;
1775 case SP4_MACH_CRED:
1776 encode_op_map(xdr, &args->state_protect.enforce);
1777 encode_op_map(xdr, &args->state_protect.allow);
1778 break;
1779 default:
1780 WARN_ON_ONCE(1);
1781 break;
1782 }
1783
1784 if (send_implementation_id &&
1785 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787 <= sizeof(impl_name) + 1)
1788 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789 utsname()->sysname, utsname()->release,
1790 utsname()->version, utsname()->machine);
1791
1792 if (len > 0) {
1793 encode_uint32(xdr, 1); /* implementation id array length=1 */
1794
1795 encode_string(xdr,
1796 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798 encode_string(xdr, len, impl_name);
1799 /* just send zeros for nii_date - the date is in nii_name */
1800 p = reserve_space(xdr, 12);
1801 p = xdr_encode_hyper(p, 0);
1802 *p = cpu_to_be32(0);
1803 } else
1804 encode_uint32(xdr, 0); /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808 struct nfs41_create_session_args *args,
1809 struct compound_hdr *hdr)
1810 {
1811 __be32 *p;
1812 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1813 uint32_t len;
1814 struct nfs_client *clp = args->client;
1815 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1816 u32 max_resp_sz_cached;
1817
1818 /*
1819 * Assumes OPEN is the biggest non-idempotent compound.
1820 * 2 is the verifier.
1821 */
1822 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1823 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1824
1825 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1826 clp->cl_ipaddr);
1827
1828 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1829 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1830 p = xdr_encode_hyper(p, clp->cl_clientid);
1831 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1832 *p++ = cpu_to_be32(args->flags); /*flags */
1833
1834 /* Fore Channel */
1835 *p++ = cpu_to_be32(0); /* header padding size */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1837 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1838 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1839 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1840 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1841 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1842
1843 /* Back Channel */
1844 *p++ = cpu_to_be32(0); /* header padding size */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1846 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1847 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1848 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1849 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1850 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1851
1852 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1853 *p++ = cpu_to_be32(1);
1854 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1855
1856 /* authsys_parms rfc1831 */
1857 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1858 p = xdr_encode_opaque(p, machine_name, len);
1859 *p++ = cpu_to_be32(0); /* UID */
1860 *p++ = cpu_to_be32(0); /* GID */
1861 *p = cpu_to_be32(0); /* No more gids */
1862 }
1863
1864 static void encode_destroy_session(struct xdr_stream *xdr,
1865 struct nfs4_session *session,
1866 struct compound_hdr *hdr)
1867 {
1868 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1869 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1870 }
1871
1872 static void encode_destroy_clientid(struct xdr_stream *xdr,
1873 uint64_t clientid,
1874 struct compound_hdr *hdr)
1875 {
1876 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1877 encode_uint64(xdr, clientid);
1878 }
1879
1880 static void encode_reclaim_complete(struct xdr_stream *xdr,
1881 struct nfs41_reclaim_complete_args *args,
1882 struct compound_hdr *hdr)
1883 {
1884 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1885 encode_uint32(xdr, args->one_fs);
1886 }
1887 #endif /* CONFIG_NFS_V4_1 */
1888
1889 static void encode_sequence(struct xdr_stream *xdr,
1890 const struct nfs4_sequence_args *args,
1891 struct compound_hdr *hdr)
1892 {
1893 #if defined(CONFIG_NFS_V4_1)
1894 struct nfs4_session *session;
1895 struct nfs4_slot_table *tp;
1896 struct nfs4_slot *slot = args->sa_slot;
1897 __be32 *p;
1898
1899 tp = slot->table;
1900 session = tp->session;
1901 if (!session)
1902 return;
1903
1904 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1905
1906 /*
1907 * Sessionid + seqid + slotid + max slotid + cache_this
1908 */
1909 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1910 "max_slotid=%d cache_this=%d\n",
1911 __func__,
1912 ((u32 *)session->sess_id.data)[0],
1913 ((u32 *)session->sess_id.data)[1],
1914 ((u32 *)session->sess_id.data)[2],
1915 ((u32 *)session->sess_id.data)[3],
1916 slot->seq_nr, slot->slot_nr,
1917 tp->highest_used_slotid, args->sa_cache_this);
1918 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1919 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1920 *p++ = cpu_to_be32(slot->seq_nr);
1921 *p++ = cpu_to_be32(slot->slot_nr);
1922 *p++ = cpu_to_be32(tp->highest_used_slotid);
1923 *p = cpu_to_be32(args->sa_cache_this);
1924 #endif /* CONFIG_NFS_V4_1 */
1925 }
1926
1927 #ifdef CONFIG_NFS_V4_1
1928 static void
1929 encode_getdevicelist(struct xdr_stream *xdr,
1930 const struct nfs4_getdevicelist_args *args,
1931 struct compound_hdr *hdr)
1932 {
1933 __be32 *p;
1934 nfs4_verifier dummy = {
1935 .data = "dummmmmy",
1936 };
1937
1938 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1939 p = reserve_space(xdr, 16);
1940 *p++ = cpu_to_be32(args->layoutclass);
1941 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1942 xdr_encode_hyper(p, 0ULL); /* cookie */
1943 encode_nfs4_verifier(xdr, &dummy);
1944 }
1945
1946 static void
1947 encode_getdeviceinfo(struct xdr_stream *xdr,
1948 const struct nfs4_getdeviceinfo_args *args,
1949 struct compound_hdr *hdr)
1950 {
1951 __be32 *p;
1952
1953 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1954 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1955 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1956 NFS4_DEVICEID4_SIZE);
1957 *p++ = cpu_to_be32(args->pdev->layout_type);
1958 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1959 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964 const struct nfs4_layoutget_args *args,
1965 struct compound_hdr *hdr)
1966 {
1967 __be32 *p;
1968
1969 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970 p = reserve_space(xdr, 36);
1971 *p++ = cpu_to_be32(0); /* Signal layout available */
1972 *p++ = cpu_to_be32(args->type);
1973 *p++ = cpu_to_be32(args->range.iomode);
1974 p = xdr_encode_hyper(p, args->range.offset);
1975 p = xdr_encode_hyper(p, args->range.length);
1976 p = xdr_encode_hyper(p, args->minlength);
1977 encode_nfs4_stateid(xdr, &args->stateid);
1978 encode_uint32(xdr, args->maxcount);
1979
1980 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981 __func__,
1982 args->type,
1983 args->range.iomode,
1984 (unsigned long)args->range.offset,
1985 (unsigned long)args->range.length,
1986 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991 struct inode *inode,
1992 const struct nfs4_layoutcommit_args *args,
1993 struct compound_hdr *hdr)
1994 {
1995 __be32 *p;
1996
1997 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001 p = reserve_space(xdr, 20);
2002 /* Only whole file layouts */
2003 p = xdr_encode_hyper(p, 0); /* offset */
2004 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2005 *p = cpu_to_be32(0); /* reclaim */
2006 encode_nfs4_stateid(xdr, &args->stateid);
2007 p = reserve_space(xdr, 20);
2008 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2009 p = xdr_encode_hyper(p, args->lastbytewritten);
2010 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2011 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2012
2013 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2014 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2015 NFS_I(inode)->layout, xdr, args);
2016 else
2017 encode_uint32(xdr, 0); /* no layout-type payload */
2018
2019 return 0;
2020 }
2021
2022 static void
2023 encode_layoutreturn(struct xdr_stream *xdr,
2024 const struct nfs4_layoutreturn_args *args,
2025 struct compound_hdr *hdr)
2026 {
2027 __be32 *p;
2028
2029 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2030 p = reserve_space(xdr, 16);
2031 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2032 *p++ = cpu_to_be32(args->layout_type);
2033 *p++ = cpu_to_be32(IOMODE_ANY);
2034 *p = cpu_to_be32(RETURN_FILE);
2035 p = reserve_space(xdr, 16);
2036 p = xdr_encode_hyper(p, 0);
2037 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2038 spin_lock(&args->inode->i_lock);
2039 encode_nfs4_stateid(xdr, &args->stateid);
2040 spin_unlock(&args->inode->i_lock);
2041 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2042 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2043 NFS_I(args->inode)->layout, xdr, args);
2044 } else
2045 encode_uint32(xdr, 0);
2046 }
2047
2048 static int
2049 encode_secinfo_no_name(struct xdr_stream *xdr,
2050 const struct nfs41_secinfo_no_name_args *args,
2051 struct compound_hdr *hdr)
2052 {
2053 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2054 encode_uint32(xdr, args->style);
2055 return 0;
2056 }
2057
2058 static void encode_test_stateid(struct xdr_stream *xdr,
2059 struct nfs41_test_stateid_args *args,
2060 struct compound_hdr *hdr)
2061 {
2062 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2063 encode_uint32(xdr, 1);
2064 encode_nfs4_stateid(xdr, args->stateid);
2065 }
2066
2067 static void encode_free_stateid(struct xdr_stream *xdr,
2068 struct nfs41_free_stateid_args *args,
2069 struct compound_hdr *hdr)
2070 {
2071 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2072 encode_nfs4_stateid(xdr, &args->stateid);
2073 }
2074 #endif /* CONFIG_NFS_V4_1 */
2075
2076 /*
2077 * END OF "GENERIC" ENCODE ROUTINES.
2078 */
2079
2080 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2081 {
2082 #if defined(CONFIG_NFS_V4_1)
2083 struct nfs4_session *session = args->sa_slot->table->session;
2084 if (session)
2085 return session->clp->cl_mvops->minor_version;
2086 #endif /* CONFIG_NFS_V4_1 */
2087 return 0;
2088 }
2089
2090 /*
2091 * Encode an ACCESS request
2092 */
2093 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2094 const struct nfs4_accessargs *args)
2095 {
2096 struct compound_hdr hdr = {
2097 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098 };
2099
2100 encode_compound_hdr(xdr, req, &hdr);
2101 encode_sequence(xdr, &args->seq_args, &hdr);
2102 encode_putfh(xdr, args->fh, &hdr);
2103 encode_access(xdr, args->access, &hdr);
2104 encode_getfattr(xdr, args->bitmask, &hdr);
2105 encode_nops(&hdr);
2106 }
2107
2108 /*
2109 * Encode LOOKUP request
2110 */
2111 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2112 const struct nfs4_lookup_arg *args)
2113 {
2114 struct compound_hdr hdr = {
2115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116 };
2117
2118 encode_compound_hdr(xdr, req, &hdr);
2119 encode_sequence(xdr, &args->seq_args, &hdr);
2120 encode_putfh(xdr, args->dir_fh, &hdr);
2121 encode_lookup(xdr, args->name, &hdr);
2122 encode_getfh(xdr, &hdr);
2123 encode_getfattr(xdr, args->bitmask, &hdr);
2124 encode_nops(&hdr);
2125 }
2126
2127 /*
2128 * Encode LOOKUP_ROOT request
2129 */
2130 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2131 struct xdr_stream *xdr,
2132 const struct nfs4_lookup_root_arg *args)
2133 {
2134 struct compound_hdr hdr = {
2135 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136 };
2137
2138 encode_compound_hdr(xdr, req, &hdr);
2139 encode_sequence(xdr, &args->seq_args, &hdr);
2140 encode_putrootfh(xdr, &hdr);
2141 encode_getfh(xdr, &hdr);
2142 encode_getfattr(xdr, args->bitmask, &hdr);
2143 encode_nops(&hdr);
2144 }
2145
2146 /*
2147 * Encode REMOVE request
2148 */
2149 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2150 const struct nfs_removeargs *args)
2151 {
2152 struct compound_hdr hdr = {
2153 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154 };
2155
2156 encode_compound_hdr(xdr, req, &hdr);
2157 encode_sequence(xdr, &args->seq_args, &hdr);
2158 encode_putfh(xdr, args->fh, &hdr);
2159 encode_remove(xdr, &args->name, &hdr);
2160 encode_nops(&hdr);
2161 }
2162
2163 /*
2164 * Encode RENAME request
2165 */
2166 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2167 const struct nfs_renameargs *args)
2168 {
2169 struct compound_hdr hdr = {
2170 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171 };
2172
2173 encode_compound_hdr(xdr, req, &hdr);
2174 encode_sequence(xdr, &args->seq_args, &hdr);
2175 encode_putfh(xdr, args->old_dir, &hdr);
2176 encode_savefh(xdr, &hdr);
2177 encode_putfh(xdr, args->new_dir, &hdr);
2178 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2179 encode_nops(&hdr);
2180 }
2181
2182 /*
2183 * Encode LINK request
2184 */
2185 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2186 const struct nfs4_link_arg *args)
2187 {
2188 struct compound_hdr hdr = {
2189 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190 };
2191
2192 encode_compound_hdr(xdr, req, &hdr);
2193 encode_sequence(xdr, &args->seq_args, &hdr);
2194 encode_putfh(xdr, args->fh, &hdr);
2195 encode_savefh(xdr, &hdr);
2196 encode_putfh(xdr, args->dir_fh, &hdr);
2197 encode_link(xdr, args->name, &hdr);
2198 encode_restorefh(xdr, &hdr);
2199 encode_getfattr(xdr, args->bitmask, &hdr);
2200 encode_nops(&hdr);
2201 }
2202
2203 /*
2204 * Encode CREATE request
2205 */
2206 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2207 const struct nfs4_create_arg *args)
2208 {
2209 struct compound_hdr hdr = {
2210 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211 };
2212
2213 encode_compound_hdr(xdr, req, &hdr);
2214 encode_sequence(xdr, &args->seq_args, &hdr);
2215 encode_putfh(xdr, args->dir_fh, &hdr);
2216 encode_create(xdr, args, &hdr);
2217 encode_getfh(xdr, &hdr);
2218 encode_getfattr(xdr, args->bitmask, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode SYMLINK request
2224 */
2225 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_create_arg *args)
2227 {
2228 nfs4_xdr_enc_create(req, xdr, args);
2229 }
2230
2231 /*
2232 * Encode GETATTR request
2233 */
2234 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2235 const struct nfs4_getattr_arg *args)
2236 {
2237 struct compound_hdr hdr = {
2238 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2239 };
2240
2241 encode_compound_hdr(xdr, req, &hdr);
2242 encode_sequence(xdr, &args->seq_args, &hdr);
2243 encode_putfh(xdr, args->fh, &hdr);
2244 encode_getfattr(xdr, args->bitmask, &hdr);
2245 encode_nops(&hdr);
2246 }
2247
2248 /*
2249 * Encode a CLOSE request
2250 */
2251 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2252 struct nfs_closeargs *args)
2253 {
2254 struct compound_hdr hdr = {
2255 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256 };
2257
2258 encode_compound_hdr(xdr, req, &hdr);
2259 encode_sequence(xdr, &args->seq_args, &hdr);
2260 encode_putfh(xdr, args->fh, &hdr);
2261 encode_close(xdr, args, &hdr);
2262 encode_getfattr(xdr, args->bitmask, &hdr);
2263 encode_nops(&hdr);
2264 }
2265
2266 /*
2267 * Encode an OPEN request
2268 */
2269 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2270 struct nfs_openargs *args)
2271 {
2272 struct compound_hdr hdr = {
2273 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274 };
2275
2276 encode_compound_hdr(xdr, req, &hdr);
2277 encode_sequence(xdr, &args->seq_args, &hdr);
2278 encode_putfh(xdr, args->fh, &hdr);
2279 encode_open(xdr, args, &hdr);
2280 encode_getfh(xdr, &hdr);
2281 if (args->access)
2282 encode_access(xdr, args->access, &hdr);
2283 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2284 encode_nops(&hdr);
2285 }
2286
2287 /*
2288 * Encode an OPEN_CONFIRM request
2289 */
2290 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2291 struct xdr_stream *xdr,
2292 struct nfs_open_confirmargs *args)
2293 {
2294 struct compound_hdr hdr = {
2295 .nops = 0,
2296 };
2297
2298 encode_compound_hdr(xdr, req, &hdr);
2299 encode_putfh(xdr, args->fh, &hdr);
2300 encode_open_confirm(xdr, args, &hdr);
2301 encode_nops(&hdr);
2302 }
2303
2304 /*
2305 * Encode an OPEN request with no attributes.
2306 */
2307 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2308 struct xdr_stream *xdr,
2309 struct nfs_openargs *args)
2310 {
2311 struct compound_hdr hdr = {
2312 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313 };
2314
2315 encode_compound_hdr(xdr, req, &hdr);
2316 encode_sequence(xdr, &args->seq_args, &hdr);
2317 encode_putfh(xdr, args->fh, &hdr);
2318 encode_open(xdr, args, &hdr);
2319 if (args->access)
2320 encode_access(xdr, args->access, &hdr);
2321 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2322 encode_nops(&hdr);
2323 }
2324
2325 /*
2326 * Encode an OPEN_DOWNGRADE request
2327 */
2328 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2329 struct xdr_stream *xdr,
2330 struct nfs_closeargs *args)
2331 {
2332 struct compound_hdr hdr = {
2333 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334 };
2335
2336 encode_compound_hdr(xdr, req, &hdr);
2337 encode_sequence(xdr, &args->seq_args, &hdr);
2338 encode_putfh(xdr, args->fh, &hdr);
2339 encode_open_downgrade(xdr, args, &hdr);
2340 encode_getfattr(xdr, args->bitmask, &hdr);
2341 encode_nops(&hdr);
2342 }
2343
2344 /*
2345 * Encode a LOCK request
2346 */
2347 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2348 struct nfs_lock_args *args)
2349 {
2350 struct compound_hdr hdr = {
2351 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352 };
2353
2354 encode_compound_hdr(xdr, req, &hdr);
2355 encode_sequence(xdr, &args->seq_args, &hdr);
2356 encode_putfh(xdr, args->fh, &hdr);
2357 encode_lock(xdr, args, &hdr);
2358 encode_nops(&hdr);
2359 }
2360
2361 /*
2362 * Encode a LOCKT request
2363 */
2364 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2365 struct nfs_lockt_args *args)
2366 {
2367 struct compound_hdr hdr = {
2368 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2369 };
2370
2371 encode_compound_hdr(xdr, req, &hdr);
2372 encode_sequence(xdr, &args->seq_args, &hdr);
2373 encode_putfh(xdr, args->fh, &hdr);
2374 encode_lockt(xdr, args, &hdr);
2375 encode_nops(&hdr);
2376 }
2377
2378 /*
2379 * Encode a LOCKU request
2380 */
2381 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2382 struct nfs_locku_args *args)
2383 {
2384 struct compound_hdr hdr = {
2385 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2386 };
2387
2388 encode_compound_hdr(xdr, req, &hdr);
2389 encode_sequence(xdr, &args->seq_args, &hdr);
2390 encode_putfh(xdr, args->fh, &hdr);
2391 encode_locku(xdr, args, &hdr);
2392 encode_nops(&hdr);
2393 }
2394
2395 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2396 struct xdr_stream *xdr,
2397 struct nfs_release_lockowner_args *args)
2398 {
2399 struct compound_hdr hdr = {
2400 .minorversion = 0,
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2405 encode_nops(&hdr);
2406 }
2407
2408 /*
2409 * Encode a READLINK request
2410 */
2411 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2412 const struct nfs4_readlink *args)
2413 {
2414 struct compound_hdr hdr = {
2415 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416 };
2417
2418 encode_compound_hdr(xdr, req, &hdr);
2419 encode_sequence(xdr, &args->seq_args, &hdr);
2420 encode_putfh(xdr, args->fh, &hdr);
2421 encode_readlink(xdr, args, req, &hdr);
2422
2423 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424 args->pgbase, args->pglen);
2425 encode_nops(&hdr);
2426 }
2427
2428 /*
2429 * Encode a READDIR request
2430 */
2431 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2432 const struct nfs4_readdir_arg *args)
2433 {
2434 struct compound_hdr hdr = {
2435 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2436 };
2437
2438 encode_compound_hdr(xdr, req, &hdr);
2439 encode_sequence(xdr, &args->seq_args, &hdr);
2440 encode_putfh(xdr, args->fh, &hdr);
2441 encode_readdir(xdr, args, req, &hdr);
2442
2443 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2444 args->pgbase, args->count);
2445 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2446 __func__, hdr.replen << 2, args->pages,
2447 args->pgbase, args->count);
2448 encode_nops(&hdr);
2449 }
2450
2451 /*
2452 * Encode a READ request
2453 */
2454 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 struct nfs_readargs *args)
2456 {
2457 struct compound_hdr hdr = {
2458 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_sequence(xdr, &args->seq_args, &hdr);
2463 encode_putfh(xdr, args->fh, &hdr);
2464 encode_read(xdr, args, &hdr);
2465
2466 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2467 args->pages, args->pgbase, args->count);
2468 req->rq_rcv_buf.flags |= XDRBUF_READ;
2469 encode_nops(&hdr);
2470 }
2471
2472 /*
2473 * Encode an SETATTR request
2474 */
2475 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2476 struct nfs_setattrargs *args)
2477 {
2478 struct compound_hdr hdr = {
2479 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480 };
2481
2482 encode_compound_hdr(xdr, req, &hdr);
2483 encode_sequence(xdr, &args->seq_args, &hdr);
2484 encode_putfh(xdr, args->fh, &hdr);
2485 encode_setattr(xdr, args, args->server, &hdr);
2486 encode_getfattr(xdr, args->bitmask, &hdr);
2487 encode_nops(&hdr);
2488 }
2489
2490 /*
2491 * Encode a GETACL request
2492 */
2493 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2494 struct nfs_getaclargs *args)
2495 {
2496 struct compound_hdr hdr = {
2497 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498 };
2499 uint32_t replen;
2500
2501 encode_compound_hdr(xdr, req, &hdr);
2502 encode_sequence(xdr, &args->seq_args, &hdr);
2503 encode_putfh(xdr, args->fh, &hdr);
2504 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2505 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2506
2507 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2508 args->acl_pages, args->acl_pgbase, args->acl_len);
2509
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * Encode a WRITE request
2515 */
2516 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_writeargs *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522
2523 encode_compound_hdr(xdr, req, &hdr);
2524 encode_sequence(xdr, &args->seq_args, &hdr);
2525 encode_putfh(xdr, args->fh, &hdr);
2526 encode_write(xdr, args, &hdr);
2527 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2528 if (args->bitmask)
2529 encode_getfattr(xdr, args->bitmask, &hdr);
2530 encode_nops(&hdr);
2531 }
2532
2533 /*
2534 * a COMMIT request
2535 */
2536 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2537 struct nfs_commitargs *args)
2538 {
2539 struct compound_hdr hdr = {
2540 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2541 };
2542
2543 encode_compound_hdr(xdr, req, &hdr);
2544 encode_sequence(xdr, &args->seq_args, &hdr);
2545 encode_putfh(xdr, args->fh, &hdr);
2546 encode_commit(xdr, args, &hdr);
2547 encode_nops(&hdr);
2548 }
2549
2550 /*
2551 * FSINFO request
2552 */
2553 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2554 struct nfs4_fsinfo_arg *args)
2555 {
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_fsinfo(xdr, args->bitmask, &hdr);
2564 encode_nops(&hdr);
2565 }
2566
2567 /*
2568 * a PATHCONF request
2569 */
2570 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2571 const struct nfs4_pathconf_arg *args)
2572 {
2573 struct compound_hdr hdr = {
2574 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575 };
2576
2577 encode_compound_hdr(xdr, req, &hdr);
2578 encode_sequence(xdr, &args->seq_args, &hdr);
2579 encode_putfh(xdr, args->fh, &hdr);
2580 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2581 &hdr);
2582 encode_nops(&hdr);
2583 }
2584
2585 /*
2586 * a STATFS request
2587 */
2588 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2589 const struct nfs4_statfs_arg *args)
2590 {
2591 struct compound_hdr hdr = {
2592 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2593 };
2594
2595 encode_compound_hdr(xdr, req, &hdr);
2596 encode_sequence(xdr, &args->seq_args, &hdr);
2597 encode_putfh(xdr, args->fh, &hdr);
2598 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2599 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2600 encode_nops(&hdr);
2601 }
2602
2603 /*
2604 * GETATTR_BITMAP request
2605 */
2606 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2607 struct xdr_stream *xdr,
2608 struct nfs4_server_caps_arg *args)
2609 {
2610 struct compound_hdr hdr = {
2611 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612 };
2613
2614 encode_compound_hdr(xdr, req, &hdr);
2615 encode_sequence(xdr, &args->seq_args, &hdr);
2616 encode_putfh(xdr, args->fhandle, &hdr);
2617 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2618 FATTR4_WORD0_FH_EXPIRE_TYPE|
2619 FATTR4_WORD0_LINK_SUPPORT|
2620 FATTR4_WORD0_SYMLINK_SUPPORT|
2621 FATTR4_WORD0_ACLSUPPORT, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a RENEW request
2627 */
2628 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2629 struct nfs_client *clp)
2630 {
2631 struct compound_hdr hdr = {
2632 .nops = 0,
2633 };
2634
2635 encode_compound_hdr(xdr, req, &hdr);
2636 encode_renew(xdr, clp->cl_clientid, &hdr);
2637 encode_nops(&hdr);
2638 }
2639
2640 /*
2641 * a SETCLIENTID request
2642 */
2643 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2644 struct xdr_stream *xdr,
2645 struct nfs4_setclientid *sc)
2646 {
2647 struct compound_hdr hdr = {
2648 .nops = 0,
2649 };
2650
2651 encode_compound_hdr(xdr, req, &hdr);
2652 encode_setclientid(xdr, sc, &hdr);
2653 encode_nops(&hdr);
2654 }
2655
2656 /*
2657 * a SETCLIENTID_CONFIRM request
2658 */
2659 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2660 struct xdr_stream *xdr,
2661 struct nfs4_setclientid_res *arg)
2662 {
2663 struct compound_hdr hdr = {
2664 .nops = 0,
2665 };
2666
2667 encode_compound_hdr(xdr, req, &hdr);
2668 encode_setclientid_confirm(xdr, arg, &hdr);
2669 encode_nops(&hdr);
2670 }
2671
2672 /*
2673 * DELEGRETURN request
2674 */
2675 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2676 struct xdr_stream *xdr,
2677 const struct nfs4_delegreturnargs *args)
2678 {
2679 struct compound_hdr hdr = {
2680 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2681 };
2682
2683 encode_compound_hdr(xdr, req, &hdr);
2684 encode_sequence(xdr, &args->seq_args, &hdr);
2685 encode_putfh(xdr, args->fhandle, &hdr);
2686 encode_getfattr(xdr, args->bitmask, &hdr);
2687 encode_delegreturn(xdr, args->stateid, &hdr);
2688 encode_nops(&hdr);
2689 }
2690
2691 /*
2692 * Encode FS_LOCATIONS request
2693 */
2694 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2695 struct xdr_stream *xdr,
2696 struct nfs4_fs_locations_arg *args)
2697 {
2698 struct compound_hdr hdr = {
2699 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2700 };
2701 uint32_t replen;
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 if (args->migration) {
2706 encode_putfh(xdr, args->fh, &hdr);
2707 replen = hdr.replen;
2708 encode_fs_locations(xdr, args->bitmask, &hdr);
2709 if (args->renew)
2710 encode_renew(xdr, args->clientid, &hdr);
2711 } else {
2712 encode_putfh(xdr, args->dir_fh, &hdr);
2713 encode_lookup(xdr, args->name, &hdr);
2714 replen = hdr.replen;
2715 encode_fs_locations(xdr, args->bitmask, &hdr);
2716 }
2717
2718 /* Set up reply kvec to capture returned fs_locations array. */
2719 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2720 0, PAGE_SIZE);
2721 encode_nops(&hdr);
2722 }
2723
2724 /*
2725 * Encode SECINFO request
2726 */
2727 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2728 struct xdr_stream *xdr,
2729 struct nfs4_secinfo_arg *args)
2730 {
2731 struct compound_hdr hdr = {
2732 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2733 };
2734
2735 encode_compound_hdr(xdr, req, &hdr);
2736 encode_sequence(xdr, &args->seq_args, &hdr);
2737 encode_putfh(xdr, args->dir_fh, &hdr);
2738 encode_secinfo(xdr, args->name, &hdr);
2739 encode_nops(&hdr);
2740 }
2741
2742 /*
2743 * Encode FSID_PRESENT request
2744 */
2745 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2746 struct xdr_stream *xdr,
2747 struct nfs4_fsid_present_arg *args)
2748 {
2749 struct compound_hdr hdr = {
2750 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2751 };
2752
2753 encode_compound_hdr(xdr, req, &hdr);
2754 encode_sequence(xdr, &args->seq_args, &hdr);
2755 encode_putfh(xdr, args->fh, &hdr);
2756 encode_getfh(xdr, &hdr);
2757 if (args->renew)
2758 encode_renew(xdr, args->clientid, &hdr);
2759 encode_nops(&hdr);
2760 }
2761
2762 #if defined(CONFIG_NFS_V4_1)
2763 /*
2764 * BIND_CONN_TO_SESSION request
2765 */
2766 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2767 struct xdr_stream *xdr,
2768 struct nfs_client *clp)
2769 {
2770 struct compound_hdr hdr = {
2771 .minorversion = clp->cl_mvops->minor_version,
2772 };
2773
2774 encode_compound_hdr(xdr, req, &hdr);
2775 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2776 encode_nops(&hdr);
2777 }
2778
2779 /*
2780 * EXCHANGE_ID request
2781 */
2782 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2783 struct xdr_stream *xdr,
2784 struct nfs41_exchange_id_args *args)
2785 {
2786 struct compound_hdr hdr = {
2787 .minorversion = args->client->cl_mvops->minor_version,
2788 };
2789
2790 encode_compound_hdr(xdr, req, &hdr);
2791 encode_exchange_id(xdr, args, &hdr);
2792 encode_nops(&hdr);
2793 }
2794
2795 /*
2796 * a CREATE_SESSION request
2797 */
2798 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2799 struct xdr_stream *xdr,
2800 struct nfs41_create_session_args *args)
2801 {
2802 struct compound_hdr hdr = {
2803 .minorversion = args->client->cl_mvops->minor_version,
2804 };
2805
2806 encode_compound_hdr(xdr, req, &hdr);
2807 encode_create_session(xdr, args, &hdr);
2808 encode_nops(&hdr);
2809 }
2810
2811 /*
2812 * a DESTROY_SESSION request
2813 */
2814 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2815 struct xdr_stream *xdr,
2816 struct nfs4_session *session)
2817 {
2818 struct compound_hdr hdr = {
2819 .minorversion = session->clp->cl_mvops->minor_version,
2820 };
2821
2822 encode_compound_hdr(xdr, req, &hdr);
2823 encode_destroy_session(xdr, session, &hdr);
2824 encode_nops(&hdr);
2825 }
2826
2827 /*
2828 * a DESTROY_CLIENTID request
2829 */
2830 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2831 struct xdr_stream *xdr,
2832 struct nfs_client *clp)
2833 {
2834 struct compound_hdr hdr = {
2835 .minorversion = clp->cl_mvops->minor_version,
2836 };
2837
2838 encode_compound_hdr(xdr, req, &hdr);
2839 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2840 encode_nops(&hdr);
2841 }
2842
2843 /*
2844 * a SEQUENCE request
2845 */
2846 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2847 struct nfs4_sequence_args *args)
2848 {
2849 struct compound_hdr hdr = {
2850 .minorversion = nfs4_xdr_minorversion(args),
2851 };
2852
2853 encode_compound_hdr(xdr, req, &hdr);
2854 encode_sequence(xdr, args, &hdr);
2855 encode_nops(&hdr);
2856 }
2857
2858 /*
2859 * a GET_LEASE_TIME request
2860 */
2861 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 struct nfs4_get_lease_time_args *args)
2864 {
2865 struct compound_hdr hdr = {
2866 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2867 };
2868 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_sequence(xdr, &args->la_seq_args, &hdr);
2872 encode_putrootfh(xdr, &hdr);
2873 encode_fsinfo(xdr, lease_bitmap, &hdr);
2874 encode_nops(&hdr);
2875 }
2876
2877 /*
2878 * a RECLAIM_COMPLETE request
2879 */
2880 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2881 struct xdr_stream *xdr,
2882 struct nfs41_reclaim_complete_args *args)
2883 {
2884 struct compound_hdr hdr = {
2885 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2886 };
2887
2888 encode_compound_hdr(xdr, req, &hdr);
2889 encode_sequence(xdr, &args->seq_args, &hdr);
2890 encode_reclaim_complete(xdr, args, &hdr);
2891 encode_nops(&hdr);
2892 }
2893
2894 /*
2895 * Encode GETDEVICELIST request
2896 */
2897 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2898 struct xdr_stream *xdr,
2899 struct nfs4_getdevicelist_args *args)
2900 {
2901 struct compound_hdr hdr = {
2902 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2903 };
2904
2905 encode_compound_hdr(xdr, req, &hdr);
2906 encode_sequence(xdr, &args->seq_args, &hdr);
2907 encode_putfh(xdr, args->fh, &hdr);
2908 encode_getdevicelist(xdr, args, &hdr);
2909 encode_nops(&hdr);
2910 }
2911
2912 /*
2913 * Encode GETDEVICEINFO request
2914 */
2915 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2916 struct xdr_stream *xdr,
2917 struct nfs4_getdeviceinfo_args *args)
2918 {
2919 struct compound_hdr hdr = {
2920 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2921 };
2922
2923 encode_compound_hdr(xdr, req, &hdr);
2924 encode_sequence(xdr, &args->seq_args, &hdr);
2925 encode_getdeviceinfo(xdr, args, &hdr);
2926
2927 /* set up reply kvec. Subtract notification bitmap max size (2)
2928 * so that notification bitmap is put in xdr_buf tail */
2929 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2930 args->pdev->pages, args->pdev->pgbase,
2931 args->pdev->pglen);
2932
2933 encode_nops(&hdr);
2934 }
2935
2936 /*
2937 * Encode LAYOUTGET request
2938 */
2939 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2940 struct xdr_stream *xdr,
2941 struct nfs4_layoutget_args *args)
2942 {
2943 struct compound_hdr hdr = {
2944 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945 };
2946
2947 encode_compound_hdr(xdr, req, &hdr);
2948 encode_sequence(xdr, &args->seq_args, &hdr);
2949 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2950 encode_layoutget(xdr, args, &hdr);
2951
2952 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2953 args->layout.pages, 0, args->layout.pglen);
2954
2955 encode_nops(&hdr);
2956 }
2957
2958 /*
2959 * Encode LAYOUTCOMMIT request
2960 */
2961 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2962 struct xdr_stream *xdr,
2963 struct nfs4_layoutcommit_args *args)
2964 {
2965 struct nfs4_layoutcommit_data *data =
2966 container_of(args, struct nfs4_layoutcommit_data, args);
2967 struct compound_hdr hdr = {
2968 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969 };
2970
2971 encode_compound_hdr(xdr, req, &hdr);
2972 encode_sequence(xdr, &args->seq_args, &hdr);
2973 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2975 encode_getfattr(xdr, args->bitmask, &hdr);
2976 encode_nops(&hdr);
2977 }
2978
2979 /*
2980 * Encode LAYOUTRETURN request
2981 */
2982 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2983 struct xdr_stream *xdr,
2984 struct nfs4_layoutreturn_args *args)
2985 {
2986 struct compound_hdr hdr = {
2987 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988 };
2989
2990 encode_compound_hdr(xdr, req, &hdr);
2991 encode_sequence(xdr, &args->seq_args, &hdr);
2992 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2993 encode_layoutreturn(xdr, args, &hdr);
2994 encode_nops(&hdr);
2995 }
2996
2997 /*
2998 * Encode SECINFO_NO_NAME request
2999 */
3000 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3001 struct xdr_stream *xdr,
3002 struct nfs41_secinfo_no_name_args *args)
3003 {
3004 struct compound_hdr hdr = {
3005 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006 };
3007
3008 encode_compound_hdr(xdr, req, &hdr);
3009 encode_sequence(xdr, &args->seq_args, &hdr);
3010 encode_putrootfh(xdr, &hdr);
3011 encode_secinfo_no_name(xdr, args, &hdr);
3012 encode_nops(&hdr);
3013 return 0;
3014 }
3015
3016 /*
3017 * Encode TEST_STATEID request
3018 */
3019 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3020 struct xdr_stream *xdr,
3021 struct nfs41_test_stateid_args *args)
3022 {
3023 struct compound_hdr hdr = {
3024 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3025 };
3026
3027 encode_compound_hdr(xdr, req, &hdr);
3028 encode_sequence(xdr, &args->seq_args, &hdr);
3029 encode_test_stateid(xdr, args, &hdr);
3030 encode_nops(&hdr);
3031 }
3032
3033 /*
3034 * Encode FREE_STATEID request
3035 */
3036 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3037 struct xdr_stream *xdr,
3038 struct nfs41_free_stateid_args *args)
3039 {
3040 struct compound_hdr hdr = {
3041 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3042 };
3043
3044 encode_compound_hdr(xdr, req, &hdr);
3045 encode_sequence(xdr, &args->seq_args, &hdr);
3046 encode_free_stateid(xdr, args, &hdr);
3047 encode_nops(&hdr);
3048 }
3049 #endif /* CONFIG_NFS_V4_1 */
3050
3051 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3052 {
3053 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3054 "Remaining buffer length is %tu words.\n",
3055 func, xdr->end - xdr->p);
3056 }
3057
3058 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3059 {
3060 __be32 *p;
3061
3062 p = xdr_inline_decode(xdr, 4);
3063 if (unlikely(!p))
3064 goto out_overflow;
3065 *len = be32_to_cpup(p);
3066 p = xdr_inline_decode(xdr, *len);
3067 if (unlikely(!p))
3068 goto out_overflow;
3069 *string = (char *)p;
3070 return 0;
3071 out_overflow:
3072 print_overflow_msg(__func__, xdr);
3073 return -EIO;
3074 }
3075
3076 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3077 {
3078 __be32 *p;
3079
3080 p = xdr_inline_decode(xdr, 8);
3081 if (unlikely(!p))
3082 goto out_overflow;
3083 hdr->status = be32_to_cpup(p++);
3084 hdr->taglen = be32_to_cpup(p);
3085
3086 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3087 if (unlikely(!p))
3088 goto out_overflow;
3089 hdr->tag = (char *)p;
3090 p += XDR_QUADLEN(hdr->taglen);
3091 hdr->nops = be32_to_cpup(p);
3092 if (unlikely(hdr->nops < 1))
3093 return nfs4_stat_to_errno(hdr->status);
3094 return 0;
3095 out_overflow:
3096 print_overflow_msg(__func__, xdr);
3097 return -EIO;
3098 }
3099
3100 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
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 (opnum != expected) {
3111 dprintk("nfs: Server returned operation"
3112 " %d but we issued a request for %d\n",
3113 opnum, expected);
3114 return -EIO;
3115 }
3116 nfserr = be32_to_cpup(p);
3117 if (nfserr != NFS_OK)
3118 return nfs4_stat_to_errno(nfserr);
3119 return 0;
3120 out_overflow:
3121 print_overflow_msg(__func__, xdr);
3122 return -EIO;
3123 }
3124
3125 /* Dummy routine */
3126 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3127 {
3128 __be32 *p;
3129 unsigned int strlen;
3130 char *str;
3131
3132 p = xdr_inline_decode(xdr, 12);
3133 if (likely(p))
3134 return decode_opaque_inline(xdr, &strlen, &str);
3135 print_overflow_msg(__func__, xdr);
3136 return -EIO;
3137 }
3138
3139 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3140 {
3141 uint32_t bmlen;
3142 __be32 *p;
3143
3144 p = xdr_inline_decode(xdr, 4);
3145 if (unlikely(!p))
3146 goto out_overflow;
3147 bmlen = be32_to_cpup(p);
3148
3149 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3150 p = xdr_inline_decode(xdr, (bmlen << 2));
3151 if (unlikely(!p))
3152 goto out_overflow;
3153 if (bmlen > 0) {
3154 bitmap[0] = be32_to_cpup(p++);
3155 if (bmlen > 1) {
3156 bitmap[1] = be32_to_cpup(p++);
3157 if (bmlen > 2)
3158 bitmap[2] = be32_to_cpup(p);
3159 }
3160 }
3161 return 0;
3162 out_overflow:
3163 print_overflow_msg(__func__, xdr);
3164 return -EIO;
3165 }
3166
3167 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3168 {
3169 __be32 *p;
3170
3171 p = xdr_inline_decode(xdr, 4);
3172 if (unlikely(!p))
3173 goto out_overflow;
3174 *attrlen = be32_to_cpup(p);
3175 *savep = xdr_stream_pos(xdr);
3176 return 0;
3177 out_overflow:
3178 print_overflow_msg(__func__, xdr);
3179 return -EIO;
3180 }
3181
3182 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3183 {
3184 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3185 int ret;
3186 ret = decode_attr_bitmap(xdr, bitmask);
3187 if (unlikely(ret < 0))
3188 return ret;
3189 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3190 } else
3191 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3192 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3193 bitmask[0], bitmask[1], bitmask[2]);
3194 return 0;
3195 }
3196
3197 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3198 {
3199 __be32 *p;
3200 int ret = 0;
3201
3202 *type = 0;
3203 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3204 return -EIO;
3205 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3206 p = xdr_inline_decode(xdr, 4);
3207 if (unlikely(!p))
3208 goto out_overflow;
3209 *type = be32_to_cpup(p);
3210 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3211 dprintk("%s: bad type %d\n", __func__, *type);
3212 return -EIO;
3213 }
3214 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3215 ret = NFS_ATTR_FATTR_TYPE;
3216 }
3217 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3218 return ret;
3219 out_overflow:
3220 print_overflow_msg(__func__, xdr);
3221 return -EIO;
3222 }
3223
3224 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3225 uint32_t *bitmap, uint32_t *type)
3226 {
3227 __be32 *p;
3228
3229 *type = 0;
3230 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3231 return -EIO;
3232 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3233 p = xdr_inline_decode(xdr, 4);
3234 if (unlikely(!p))
3235 goto out_overflow;
3236 *type = be32_to_cpup(p);
3237 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3238 }
3239 dprintk("%s: expire type=0x%x\n", __func__, *type);
3240 return 0;
3241 out_overflow:
3242 print_overflow_msg(__func__, xdr);
3243 return -EIO;
3244 }
3245
3246 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3247 {
3248 __be32 *p;
3249 int ret = 0;
3250
3251 *change = 0;
3252 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3253 return -EIO;
3254 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3255 p = xdr_inline_decode(xdr, 8);
3256 if (unlikely(!p))
3257 goto out_overflow;
3258 xdr_decode_hyper(p, change);
3259 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3260 ret = NFS_ATTR_FATTR_CHANGE;
3261 }
3262 dprintk("%s: change attribute=%Lu\n", __func__,
3263 (unsigned long long)*change);
3264 return ret;
3265 out_overflow:
3266 print_overflow_msg(__func__, xdr);
3267 return -EIO;
3268 }
3269
3270 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3271 {
3272 __be32 *p;
3273 int ret = 0;
3274
3275 *size = 0;
3276 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3277 return -EIO;
3278 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3279 p = xdr_inline_decode(xdr, 8);
3280 if (unlikely(!p))
3281 goto out_overflow;
3282 xdr_decode_hyper(p, size);
3283 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3284 ret = NFS_ATTR_FATTR_SIZE;
3285 }
3286 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3287 return ret;
3288 out_overflow:
3289 print_overflow_msg(__func__, xdr);
3290 return -EIO;
3291 }
3292
3293 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294 {
3295 __be32 *p;
3296
3297 *res = 0;
3298 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3299 return -EIO;
3300 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3301 p = xdr_inline_decode(xdr, 4);
3302 if (unlikely(!p))
3303 goto out_overflow;
3304 *res = be32_to_cpup(p);
3305 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3306 }
3307 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3308 return 0;
3309 out_overflow:
3310 print_overflow_msg(__func__, xdr);
3311 return -EIO;
3312 }
3313
3314 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3315 {
3316 __be32 *p;
3317
3318 *res = 0;
3319 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3320 return -EIO;
3321 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3322 p = xdr_inline_decode(xdr, 4);
3323 if (unlikely(!p))
3324 goto out_overflow;
3325 *res = be32_to_cpup(p);
3326 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3327 }
3328 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3329 return 0;
3330 out_overflow:
3331 print_overflow_msg(__func__, xdr);
3332 return -EIO;
3333 }
3334
3335 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3336 {
3337 __be32 *p;
3338 int ret = 0;
3339
3340 fsid->major = 0;
3341 fsid->minor = 0;
3342 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3343 return -EIO;
3344 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3345 p = xdr_inline_decode(xdr, 16);
3346 if (unlikely(!p))
3347 goto out_overflow;
3348 p = xdr_decode_hyper(p, &fsid->major);
3349 xdr_decode_hyper(p, &fsid->minor);
3350 bitmap[0] &= ~FATTR4_WORD0_FSID;
3351 ret = NFS_ATTR_FATTR_FSID;
3352 }
3353 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3354 (unsigned long long)fsid->major,
3355 (unsigned long long)fsid->minor);
3356 return ret;
3357 out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360 }
3361
3362 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363 {
3364 __be32 *p;
3365
3366 *res = 60;
3367 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3368 return -EIO;
3369 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3370 p = xdr_inline_decode(xdr, 4);
3371 if (unlikely(!p))
3372 goto out_overflow;
3373 *res = be32_to_cpup(p);
3374 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3375 }
3376 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3377 return 0;
3378 out_overflow:
3379 print_overflow_msg(__func__, xdr);
3380 return -EIO;
3381 }
3382
3383 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3384 {
3385 __be32 *p;
3386
3387 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3388 return -EIO;
3389 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3390 p = xdr_inline_decode(xdr, 4);
3391 if (unlikely(!p))
3392 goto out_overflow;
3393 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3394 *res = -be32_to_cpup(p);
3395 }
3396 return 0;
3397 out_overflow:
3398 print_overflow_msg(__func__, xdr);
3399 return -EIO;
3400 }
3401
3402 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3403 {
3404 __be32 *p;
3405 int len;
3406
3407 if (fh != NULL)
3408 memset(fh, 0, sizeof(*fh));
3409
3410 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3411 return -EIO;
3412 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3413 p = xdr_inline_decode(xdr, 4);
3414 if (unlikely(!p))
3415 goto out_overflow;
3416 len = be32_to_cpup(p);
3417 if (len > NFS4_FHSIZE)
3418 return -EIO;
3419 p = xdr_inline_decode(xdr, len);
3420 if (unlikely(!p))
3421 goto out_overflow;
3422 if (fh != NULL) {
3423 memcpy(fh->data, p, len);
3424 fh->size = len;
3425 }
3426 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3427 }
3428 return 0;
3429 out_overflow:
3430 print_overflow_msg(__func__, xdr);
3431 return -EIO;
3432 }
3433
3434 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3435 {
3436 __be32 *p;
3437
3438 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3439 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3440 return -EIO;
3441 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3442 p = xdr_inline_decode(xdr, 4);
3443 if (unlikely(!p))
3444 goto out_overflow;
3445 *res = be32_to_cpup(p);
3446 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3447 }
3448 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3449 return 0;
3450 out_overflow:
3451 print_overflow_msg(__func__, xdr);
3452 return -EIO;
3453 }
3454
3455 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3456 {
3457 __be32 *p;
3458 int ret = 0;
3459
3460 *fileid = 0;
3461 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3462 return -EIO;
3463 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3464 p = xdr_inline_decode(xdr, 8);
3465 if (unlikely(!p))
3466 goto out_overflow;
3467 xdr_decode_hyper(p, fileid);
3468 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3469 ret = NFS_ATTR_FATTR_FILEID;
3470 }
3471 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3472 return ret;
3473 out_overflow:
3474 print_overflow_msg(__func__, xdr);
3475 return -EIO;
3476 }
3477
3478 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480 __be32 *p;
3481 int ret = 0;
3482
3483 *fileid = 0;
3484 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3485 return -EIO;
3486 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3487 p = xdr_inline_decode(xdr, 8);
3488 if (unlikely(!p))
3489 goto out_overflow;
3490 xdr_decode_hyper(p, fileid);
3491 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3492 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3493 }
3494 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495 return ret;
3496 out_overflow:
3497 print_overflow_msg(__func__, xdr);
3498 return -EIO;
3499 }
3500
3501 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503 __be32 *p;
3504 int status = 0;
3505
3506 *res = 0;
3507 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3508 return -EIO;
3509 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3510 p = xdr_inline_decode(xdr, 8);
3511 if (unlikely(!p))
3512 goto out_overflow;
3513 xdr_decode_hyper(p, res);
3514 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3515 }
3516 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3517 return status;
3518 out_overflow:
3519 print_overflow_msg(__func__, xdr);
3520 return -EIO;
3521 }
3522
3523 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525 __be32 *p;
3526 int status = 0;
3527
3528 *res = 0;
3529 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3530 return -EIO;
3531 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3532 p = xdr_inline_decode(xdr, 8);
3533 if (unlikely(!p))
3534 goto out_overflow;
3535 xdr_decode_hyper(p, res);
3536 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3537 }
3538 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3539 return status;
3540 out_overflow:
3541 print_overflow_msg(__func__, xdr);
3542 return -EIO;
3543 }
3544
3545 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547 __be32 *p;
3548 int status = 0;
3549
3550 *res = 0;
3551 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3552 return -EIO;
3553 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3554 p = xdr_inline_decode(xdr, 8);
3555 if (unlikely(!p))
3556 goto out_overflow;
3557 xdr_decode_hyper(p, res);
3558 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3559 }
3560 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3561 return status;
3562 out_overflow:
3563 print_overflow_msg(__func__, xdr);
3564 return -EIO;
3565 }
3566
3567 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3568 {
3569 u32 n;
3570 __be32 *p;
3571 int status = 0;
3572
3573 p = xdr_inline_decode(xdr, 4);
3574 if (unlikely(!p))
3575 goto out_overflow;
3576 n = be32_to_cpup(p);
3577 if (n == 0)
3578 goto root_path;
3579 dprintk("pathname4: ");
3580 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3581 dprintk("cannot parse %d components in path\n", n);
3582 goto out_eio;
3583 }
3584 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3585 struct nfs4_string *component = &path->components[path->ncomponents];
3586 status = decode_opaque_inline(xdr, &component->len, &component->data);
3587 if (unlikely(status != 0))
3588 goto out_eio;
3589 ifdebug (XDR)
3590 pr_cont("%s%.*s ",
3591 (path->ncomponents != n ? "/ " : ""),
3592 component->len, component->data);
3593 }
3594 out:
3595 return status;
3596 root_path:
3597 /* a root pathname is sent as a zero component4 */
3598 path->ncomponents = 1;
3599 path->components[0].len=0;
3600 path->components[0].data=NULL;
3601 dprintk("pathname4: /\n");
3602 goto out;
3603 out_eio:
3604 dprintk(" status %d", status);
3605 status = -EIO;
3606 goto out;
3607 out_overflow:
3608 print_overflow_msg(__func__, xdr);
3609 return -EIO;
3610 }
3611
3612 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3613 {
3614 int n;
3615 __be32 *p;
3616 int status = -EIO;
3617
3618 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3619 goto out;
3620 status = 0;
3621 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3622 goto out;
3623 status = -EIO;
3624 /* Ignore borken servers that return unrequested attrs */
3625 if (unlikely(res == NULL))
3626 goto out;
3627 dprintk("%s: fsroot:\n", __func__);
3628 status = decode_pathname(xdr, &res->fs_path);
3629 if (unlikely(status != 0))
3630 goto out;
3631 p = xdr_inline_decode(xdr, 4);
3632 if (unlikely(!p))
3633 goto out_overflow;
3634 n = be32_to_cpup(p);
3635 if (n <= 0)
3636 goto out_eio;
3637 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3638 u32 m;
3639 struct nfs4_fs_location *loc;
3640
3641 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3642 break;
3643 loc = &res->locations[res->nlocations];
3644 p = xdr_inline_decode(xdr, 4);
3645 if (unlikely(!p))
3646 goto out_overflow;
3647 m = be32_to_cpup(p);
3648
3649 dprintk("%s: servers:\n", __func__);
3650 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3651 struct nfs4_string *server;
3652
3653 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3654 unsigned int i;
3655 dprintk("%s: using first %u of %u servers "
3656 "returned for location %u\n",
3657 __func__,
3658 NFS4_FS_LOCATION_MAXSERVERS,
3659 m, res->nlocations);
3660 for (i = loc->nservers; i < m; i++) {
3661 unsigned int len;
3662 char *data;
3663 status = decode_opaque_inline(xdr, &len, &data);
3664 if (unlikely(status != 0))
3665 goto out_eio;
3666 }
3667 break;
3668 }
3669 server = &loc->servers[loc->nservers];
3670 status = decode_opaque_inline(xdr, &server->len, &server->data);
3671 if (unlikely(status != 0))
3672 goto out_eio;
3673 dprintk("%s ", server->data);
3674 }
3675 status = decode_pathname(xdr, &loc->rootpath);
3676 if (unlikely(status != 0))
3677 goto out_eio;
3678 }
3679 if (res->nlocations != 0)
3680 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3681 out:
3682 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3683 return status;
3684 out_overflow:
3685 print_overflow_msg(__func__, xdr);
3686 out_eio:
3687 status = -EIO;
3688 goto out;
3689 }
3690
3691 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3692 {
3693 __be32 *p;
3694 int status = 0;
3695
3696 *res = 0;
3697 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3698 return -EIO;
3699 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3700 p = xdr_inline_decode(xdr, 8);
3701 if (unlikely(!p))
3702 goto out_overflow;
3703 xdr_decode_hyper(p, res);
3704 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3705 }
3706 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3707 return status;
3708 out_overflow:
3709 print_overflow_msg(__func__, xdr);
3710 return -EIO;
3711 }
3712
3713 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3714 {
3715 __be32 *p;
3716 int status = 0;
3717
3718 *maxlink = 1;
3719 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3720 return -EIO;
3721 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3722 p = xdr_inline_decode(xdr, 4);
3723 if (unlikely(!p))
3724 goto out_overflow;
3725 *maxlink = be32_to_cpup(p);
3726 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3727 }
3728 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3729 return status;
3730 out_overflow:
3731 print_overflow_msg(__func__, xdr);
3732 return -EIO;
3733 }
3734
3735 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3736 {
3737 __be32 *p;
3738 int status = 0;
3739
3740 *maxname = 1024;
3741 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3742 return -EIO;
3743 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3744 p = xdr_inline_decode(xdr, 4);
3745 if (unlikely(!p))
3746 goto out_overflow;
3747 *maxname = be32_to_cpup(p);
3748 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3749 }
3750 dprintk("%s: maxname=%u\n", __func__, *maxname);
3751 return status;
3752 out_overflow:
3753 print_overflow_msg(__func__, xdr);
3754 return -EIO;
3755 }
3756
3757 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3758 {
3759 __be32 *p;
3760 int status = 0;
3761
3762 *res = 1024;
3763 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3764 return -EIO;
3765 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3766 uint64_t maxread;
3767 p = xdr_inline_decode(xdr, 8);
3768 if (unlikely(!p))
3769 goto out_overflow;
3770 xdr_decode_hyper(p, &maxread);
3771 if (maxread > 0x7FFFFFFF)
3772 maxread = 0x7FFFFFFF;
3773 *res = (uint32_t)maxread;
3774 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3775 }
3776 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3777 return status;
3778 out_overflow:
3779 print_overflow_msg(__func__, xdr);
3780 return -EIO;
3781 }
3782
3783 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3784 {
3785 __be32 *p;
3786 int status = 0;
3787
3788 *res = 1024;
3789 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3790 return -EIO;
3791 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3792 uint64_t maxwrite;
3793 p = xdr_inline_decode(xdr, 8);
3794 if (unlikely(!p))
3795 goto out_overflow;
3796 xdr_decode_hyper(p, &maxwrite);
3797 if (maxwrite > 0x7FFFFFFF)
3798 maxwrite = 0x7FFFFFFF;
3799 *res = (uint32_t)maxwrite;
3800 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3801 }
3802 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3803 return status;
3804 out_overflow:
3805 print_overflow_msg(__func__, xdr);
3806 return -EIO;
3807 }
3808
3809 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3810 {
3811 uint32_t tmp;
3812 __be32 *p;
3813 int ret = 0;
3814
3815 *mode = 0;
3816 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3817 return -EIO;
3818 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3819 p = xdr_inline_decode(xdr, 4);
3820 if (unlikely(!p))
3821 goto out_overflow;
3822 tmp = be32_to_cpup(p);
3823 *mode = tmp & ~S_IFMT;
3824 bitmap[1] &= ~FATTR4_WORD1_MODE;
3825 ret = NFS_ATTR_FATTR_MODE;
3826 }
3827 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3828 return ret;
3829 out_overflow:
3830 print_overflow_msg(__func__, xdr);
3831 return -EIO;
3832 }
3833
3834 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3835 {
3836 __be32 *p;
3837 int ret = 0;
3838
3839 *nlink = 1;
3840 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3841 return -EIO;
3842 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3843 p = xdr_inline_decode(xdr, 4);
3844 if (unlikely(!p))
3845 goto out_overflow;
3846 *nlink = be32_to_cpup(p);
3847 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3848 ret = NFS_ATTR_FATTR_NLINK;
3849 }
3850 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3851 return ret;
3852 out_overflow:
3853 print_overflow_msg(__func__, xdr);
3854 return -EIO;
3855 }
3856
3857 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3858 const struct nfs_server *server, kuid_t *uid,
3859 struct nfs4_string *owner_name)
3860 {
3861 uint32_t len;
3862 __be32 *p;
3863 int ret = 0;
3864
3865 *uid = make_kuid(&init_user_ns, -2);
3866 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3867 return -EIO;
3868 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3869 p = xdr_inline_decode(xdr, 4);
3870 if (unlikely(!p))
3871 goto out_overflow;
3872 len = be32_to_cpup(p);
3873 p = xdr_inline_decode(xdr, len);
3874 if (unlikely(!p))
3875 goto out_overflow;
3876 if (owner_name != NULL) {
3877 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3878 if (owner_name->data != NULL) {
3879 owner_name->len = len;
3880 ret = NFS_ATTR_FATTR_OWNER_NAME;
3881 }
3882 } else if (len < XDR_MAX_NETOBJ) {
3883 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3884 ret = NFS_ATTR_FATTR_OWNER;
3885 else
3886 dprintk("%s: nfs_map_name_to_uid failed!\n",
3887 __func__);
3888 } else
3889 dprintk("%s: name too long (%u)!\n",
3890 __func__, len);
3891 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3892 }
3893 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3894 return ret;
3895 out_overflow:
3896 print_overflow_msg(__func__, xdr);
3897 return -EIO;
3898 }
3899
3900 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3901 const struct nfs_server *server, kgid_t *gid,
3902 struct nfs4_string *group_name)
3903 {
3904 uint32_t len;
3905 __be32 *p;
3906 int ret = 0;
3907
3908 *gid = make_kgid(&init_user_ns, -2);
3909 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3910 return -EIO;
3911 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3912 p = xdr_inline_decode(xdr, 4);
3913 if (unlikely(!p))
3914 goto out_overflow;
3915 len = be32_to_cpup(p);
3916 p = xdr_inline_decode(xdr, len);
3917 if (unlikely(!p))
3918 goto out_overflow;
3919 if (group_name != NULL) {
3920 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3921 if (group_name->data != NULL) {
3922 group_name->len = len;
3923 ret = NFS_ATTR_FATTR_GROUP_NAME;
3924 }
3925 } else if (len < XDR_MAX_NETOBJ) {
3926 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3927 ret = NFS_ATTR_FATTR_GROUP;
3928 else
3929 dprintk("%s: nfs_map_group_to_gid failed!\n",
3930 __func__);
3931 } else
3932 dprintk("%s: name too long (%u)!\n",
3933 __func__, len);
3934 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3935 }
3936 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3937 return ret;
3938 out_overflow:
3939 print_overflow_msg(__func__, xdr);
3940 return -EIO;
3941 }
3942
3943 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3944 {
3945 uint32_t major = 0, minor = 0;
3946 __be32 *p;
3947 int ret = 0;
3948
3949 *rdev = MKDEV(0,0);
3950 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3951 return -EIO;
3952 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3953 dev_t tmp;
3954
3955 p = xdr_inline_decode(xdr, 8);
3956 if (unlikely(!p))
3957 goto out_overflow;
3958 major = be32_to_cpup(p++);
3959 minor = be32_to_cpup(p);
3960 tmp = MKDEV(major, minor);
3961 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3962 *rdev = tmp;
3963 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3964 ret = NFS_ATTR_FATTR_RDEV;
3965 }
3966 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3967 return ret;
3968 out_overflow:
3969 print_overflow_msg(__func__, xdr);
3970 return -EIO;
3971 }
3972
3973 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975 __be32 *p;
3976 int status = 0;
3977
3978 *res = 0;
3979 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3980 return -EIO;
3981 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3982 p = xdr_inline_decode(xdr, 8);
3983 if (unlikely(!p))
3984 goto out_overflow;
3985 xdr_decode_hyper(p, res);
3986 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3987 }
3988 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3989 return status;
3990 out_overflow:
3991 print_overflow_msg(__func__, xdr);
3992 return -EIO;
3993 }
3994
3995 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3996 {
3997 __be32 *p;
3998 int status = 0;
3999
4000 *res = 0;
4001 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4002 return -EIO;
4003 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4004 p = xdr_inline_decode(xdr, 8);
4005 if (unlikely(!p))
4006 goto out_overflow;
4007 xdr_decode_hyper(p, res);
4008 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4009 }
4010 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4011 return status;
4012 out_overflow:
4013 print_overflow_msg(__func__, xdr);
4014 return -EIO;
4015 }
4016
4017 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4018 {
4019 __be32 *p;
4020 int status = 0;
4021
4022 *res = 0;
4023 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4024 return -EIO;
4025 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4026 p = xdr_inline_decode(xdr, 8);
4027 if (unlikely(!p))
4028 goto out_overflow;
4029 xdr_decode_hyper(p, res);
4030 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4031 }
4032 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4033 return status;
4034 out_overflow:
4035 print_overflow_msg(__func__, xdr);
4036 return -EIO;
4037 }
4038
4039 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4040 {
4041 __be32 *p;
4042 int ret = 0;
4043
4044 *used = 0;
4045 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4046 return -EIO;
4047 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4048 p = xdr_inline_decode(xdr, 8);
4049 if (unlikely(!p))
4050 goto out_overflow;
4051 xdr_decode_hyper(p, used);
4052 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4053 ret = NFS_ATTR_FATTR_SPACE_USED;
4054 }
4055 dprintk("%s: space used=%Lu\n", __func__,
4056 (unsigned long long)*used);
4057 return ret;
4058 out_overflow:
4059 print_overflow_msg(__func__, xdr);
4060 return -EIO;
4061 }
4062
4063 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4064 {
4065 __be32 *p;
4066 uint64_t sec;
4067 uint32_t nsec;
4068
4069 p = xdr_inline_decode(xdr, 12);
4070 if (unlikely(!p))
4071 goto out_overflow;
4072 p = xdr_decode_hyper(p, &sec);
4073 nsec = be32_to_cpup(p);
4074 time->tv_sec = (time_t)sec;
4075 time->tv_nsec = (long)nsec;
4076 return 0;
4077 out_overflow:
4078 print_overflow_msg(__func__, xdr);
4079 return -EIO;
4080 }
4081
4082 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4083 {
4084 int status = 0;
4085
4086 time->tv_sec = 0;
4087 time->tv_nsec = 0;
4088 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4089 return -EIO;
4090 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4091 status = decode_attr_time(xdr, time);
4092 if (status == 0)
4093 status = NFS_ATTR_FATTR_ATIME;
4094 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4095 }
4096 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4097 return status;
4098 }
4099
4100 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4101 {
4102 int status = 0;
4103
4104 time->tv_sec = 0;
4105 time->tv_nsec = 0;
4106 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4107 return -EIO;
4108 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4109 status = decode_attr_time(xdr, time);
4110 if (status == 0)
4111 status = NFS_ATTR_FATTR_CTIME;
4112 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4113 }
4114 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4115 return status;
4116 }
4117
4118 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4119 struct timespec *time)
4120 {
4121 int status = 0;
4122
4123 time->tv_sec = 0;
4124 time->tv_nsec = 0;
4125 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4126 return -EIO;
4127 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4128 status = decode_attr_time(xdr, time);
4129 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4130 }
4131 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4132 (long)time->tv_nsec);
4133 return status;
4134 }
4135
4136 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4137 struct nfs4_label *label)
4138 {
4139 uint32_t pi = 0;
4140 uint32_t lfs = 0;
4141 __u32 len;
4142 __be32 *p;
4143 int status = 0;
4144
4145 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4146 return -EIO;
4147 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4148 p = xdr_inline_decode(xdr, 4);
4149 if (unlikely(!p))
4150 goto out_overflow;
4151 lfs = be32_to_cpup(p++);
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 goto out_overflow;
4155 pi = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, 4);
4157 if (unlikely(!p))
4158 goto out_overflow;
4159 len = be32_to_cpup(p++);
4160 p = xdr_inline_decode(xdr, len);
4161 if (unlikely(!p))
4162 goto out_overflow;
4163 if (len < NFS4_MAXLABELLEN) {
4164 if (label) {
4165 memcpy(label->label, p, len);
4166 label->len = len;
4167 label->pi = pi;
4168 label->lfs = lfs;
4169 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4170 }
4171 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4172 } else
4173 printk(KERN_WARNING "%s: label too long (%u)!\n",
4174 __func__, len);
4175 }
4176 if (label && label->label)
4177 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4178 (char *)label->label, label->len, label->pi, label->lfs);
4179 return status;
4180
4181 out_overflow:
4182 print_overflow_msg(__func__, xdr);
4183 return -EIO;
4184 }
4185
4186 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4187 {
4188 int status = 0;
4189
4190 time->tv_sec = 0;
4191 time->tv_nsec = 0;
4192 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4193 return -EIO;
4194 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4195 status = decode_attr_time(xdr, time);
4196 if (status == 0)
4197 status = NFS_ATTR_FATTR_MTIME;
4198 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4199 }
4200 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4201 return status;
4202 }
4203
4204 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4205 {
4206 unsigned int attrwords = XDR_QUADLEN(attrlen);
4207 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4208
4209 if (unlikely(attrwords != nwords)) {
4210 dprintk("%s: server returned incorrect attribute length: "
4211 "%u %c %u\n",
4212 __func__,
4213 attrwords << 2,
4214 (attrwords < nwords) ? '<' : '>',
4215 nwords << 2);
4216 return -EIO;
4217 }
4218 return 0;
4219 }
4220
4221 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4222 {
4223 __be32 *p;
4224
4225 p = xdr_inline_decode(xdr, 20);
4226 if (unlikely(!p))
4227 goto out_overflow;
4228 cinfo->atomic = be32_to_cpup(p++);
4229 p = xdr_decode_hyper(p, &cinfo->before);
4230 xdr_decode_hyper(p, &cinfo->after);
4231 return 0;
4232 out_overflow:
4233 print_overflow_msg(__func__, xdr);
4234 return -EIO;
4235 }
4236
4237 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238 {
4239 __be32 *p;
4240 uint32_t supp, acc;
4241 int status;
4242
4243 status = decode_op_hdr(xdr, OP_ACCESS);
4244 if (status)
4245 return status;
4246 p = xdr_inline_decode(xdr, 8);
4247 if (unlikely(!p))
4248 goto out_overflow;
4249 supp = be32_to_cpup(p++);
4250 acc = be32_to_cpup(p);
4251 *supported = supp;
4252 *access = acc;
4253 return 0;
4254 out_overflow:
4255 print_overflow_msg(__func__, xdr);
4256 return -EIO;
4257 }
4258
4259 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4260 {
4261 __be32 *p;
4262
4263 p = xdr_inline_decode(xdr, len);
4264 if (likely(p)) {
4265 memcpy(buf, p, len);
4266 return 0;
4267 }
4268 print_overflow_msg(__func__, xdr);
4269 return -EIO;
4270 }
4271
4272 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4273 {
4274 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4275 }
4276
4277 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4278 {
4279 int status;
4280
4281 status = decode_op_hdr(xdr, OP_CLOSE);
4282 if (status != -EIO)
4283 nfs_increment_open_seqid(status, res->seqid);
4284 if (!status)
4285 status = decode_stateid(xdr, &res->stateid);
4286 return status;
4287 }
4288
4289 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4290 {
4291 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4292 }
4293
4294 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4295 {
4296 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4297 }
4298
4299 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4300 {
4301 int status;
4302
4303 status = decode_op_hdr(xdr, OP_COMMIT);
4304 if (!status)
4305 status = decode_write_verifier(xdr, &res->verf->verifier);
4306 return status;
4307 }
4308
4309 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4310 {
4311 __be32 *p;
4312 uint32_t bmlen;
4313 int status;
4314
4315 status = decode_op_hdr(xdr, OP_CREATE);
4316 if (status)
4317 return status;
4318 if ((status = decode_change_info(xdr, cinfo)))
4319 return status;
4320 p = xdr_inline_decode(xdr, 4);
4321 if (unlikely(!p))
4322 goto out_overflow;
4323 bmlen = be32_to_cpup(p);
4324 p = xdr_inline_decode(xdr, bmlen << 2);
4325 if (likely(p))
4326 return 0;
4327 out_overflow:
4328 print_overflow_msg(__func__, xdr);
4329 return -EIO;
4330 }
4331
4332 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4333 {
4334 unsigned int savep;
4335 uint32_t attrlen, bitmap[3] = {0};
4336 int status;
4337
4338 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4339 goto xdr_error;
4340 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4341 goto xdr_error;
4342 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4343 goto xdr_error;
4344 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4345 goto xdr_error;
4346 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4347 &res->fh_expire_type)) != 0)
4348 goto xdr_error;
4349 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4350 goto xdr_error;
4351 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4352 goto xdr_error;
4353 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4354 goto xdr_error;
4355 status = verify_attr_len(xdr, savep, attrlen);
4356 xdr_error:
4357 dprintk("%s: xdr returned %d!\n", __func__, -status);
4358 return status;
4359 }
4360
4361 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4362 {
4363 unsigned int savep;
4364 uint32_t attrlen, bitmap[3] = {0};
4365 int status;
4366
4367 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4368 goto xdr_error;
4369 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4370 goto xdr_error;
4371 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4372 goto xdr_error;
4373
4374 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4375 goto xdr_error;
4376 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4377 goto xdr_error;
4378 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4379 goto xdr_error;
4380 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4381 goto xdr_error;
4382 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4385 goto xdr_error;
4386
4387 status = verify_attr_len(xdr, savep, attrlen);
4388 xdr_error:
4389 dprintk("%s: xdr returned %d!\n", __func__, -status);
4390 return status;
4391 }
4392
4393 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4394 {
4395 unsigned int savep;
4396 uint32_t attrlen, bitmap[3] = {0};
4397 int status;
4398
4399 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4400 goto xdr_error;
4401 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4402 goto xdr_error;
4403 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4404 goto xdr_error;
4405
4406 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4407 goto xdr_error;
4408 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4409 goto xdr_error;
4410
4411 status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413 dprintk("%s: xdr returned %d!\n", __func__, -status);
4414 return status;
4415 }
4416
4417 static int decode_threshold_hint(struct xdr_stream *xdr,
4418 uint32_t *bitmap,
4419 uint64_t *res,
4420 uint32_t hint_bit)
4421 {
4422 __be32 *p;
4423
4424 *res = 0;
4425 if (likely(bitmap[0] & hint_bit)) {
4426 p = xdr_inline_decode(xdr, 8);
4427 if (unlikely(!p))
4428 goto out_overflow;
4429 xdr_decode_hyper(p, res);
4430 }
4431 return 0;
4432 out_overflow:
4433 print_overflow_msg(__func__, xdr);
4434 return -EIO;
4435 }
4436
4437 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4438 struct nfs4_threshold *res)
4439 {
4440 __be32 *p;
4441 unsigned int savep;
4442 uint32_t bitmap[3] = {0,}, attrlen;
4443 int status;
4444
4445 /* layout type */
4446 p = xdr_inline_decode(xdr, 4);
4447 if (unlikely(!p)) {
4448 print_overflow_msg(__func__, xdr);
4449 return -EIO;
4450 }
4451 res->l_type = be32_to_cpup(p);
4452
4453 /* thi_hintset bitmap */
4454 status = decode_attr_bitmap(xdr, bitmap);
4455 if (status < 0)
4456 goto xdr_error;
4457
4458 /* thi_hintlist length */
4459 status = decode_attr_length(xdr, &attrlen, &savep);
4460 if (status < 0)
4461 goto xdr_error;
4462 /* thi_hintlist */
4463 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4464 if (status < 0)
4465 goto xdr_error;
4466 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4467 if (status < 0)
4468 goto xdr_error;
4469 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4470 THRESHOLD_RD_IO);
4471 if (status < 0)
4472 goto xdr_error;
4473 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4474 THRESHOLD_WR_IO);
4475 if (status < 0)
4476 goto xdr_error;
4477
4478 status = verify_attr_len(xdr, savep, attrlen);
4479 res->bm = bitmap[0];
4480
4481 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4482 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4483 res->wr_io_sz);
4484 xdr_error:
4485 dprintk("%s ret=%d!\n", __func__, status);
4486 return status;
4487 }
4488
4489 /*
4490 * Thresholds on pNFS direct I/O vrs MDS I/O
4491 */
4492 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4493 uint32_t *bitmap,
4494 struct nfs4_threshold *res)
4495 {
4496 __be32 *p;
4497 int status = 0;
4498 uint32_t num;
4499
4500 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4501 return -EIO;
4502 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4503 /* Did the server return an unrequested attribute? */
4504 if (unlikely(res == NULL))
4505 return -EREMOTEIO;
4506 p = xdr_inline_decode(xdr, 4);
4507 if (unlikely(!p))
4508 goto out_overflow;
4509 num = be32_to_cpup(p);
4510 if (num == 0)
4511 return 0;
4512 if (num > 1)
4513 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4514 "drivers per filesystem not supported\n",
4515 __func__);
4516
4517 status = decode_first_threshold_item4(xdr, res);
4518 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4519 }
4520 return status;
4521 out_overflow:
4522 print_overflow_msg(__func__, xdr);
4523 return -EIO;
4524 }
4525
4526 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4527 struct nfs_fattr *fattr, struct nfs_fh *fh,
4528 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4529 const struct nfs_server *server)
4530 {
4531 int status;
4532 umode_t fmode = 0;
4533 uint32_t type;
4534 int32_t err;
4535
4536 status = decode_attr_type(xdr, bitmap, &type);
4537 if (status < 0)
4538 goto xdr_error;
4539 fattr->mode = 0;
4540 if (status != 0) {
4541 fattr->mode |= nfs_type2fmt[type];
4542 fattr->valid |= status;
4543 }
4544
4545 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4546 if (status < 0)
4547 goto xdr_error;
4548 fattr->valid |= status;
4549
4550 status = decode_attr_size(xdr, bitmap, &fattr->size);
4551 if (status < 0)
4552 goto xdr_error;
4553 fattr->valid |= status;
4554
4555 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4556 if (status < 0)
4557 goto xdr_error;
4558 fattr->valid |= status;
4559
4560 err = 0;
4561 status = decode_attr_error(xdr, bitmap, &err);
4562 if (status < 0)
4563 goto xdr_error;
4564
4565 status = decode_attr_filehandle(xdr, bitmap, fh);
4566 if (status < 0)
4567 goto xdr_error;
4568
4569 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4570 if (status < 0)
4571 goto xdr_error;
4572 fattr->valid |= status;
4573
4574 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4575 if (status < 0)
4576 goto xdr_error;
4577 fattr->valid |= status;
4578
4579 status = decode_attr_mode(xdr, bitmap, &fmode);
4580 if (status < 0)
4581 goto xdr_error;
4582 if (status != 0) {
4583 fattr->mode |= fmode;
4584 fattr->valid |= status;
4585 }
4586
4587 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4588 if (status < 0)
4589 goto xdr_error;
4590 fattr->valid |= status;
4591
4592 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4593 if (status < 0)
4594 goto xdr_error;
4595 fattr->valid |= status;
4596
4597 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4598 if (status < 0)
4599 goto xdr_error;
4600 fattr->valid |= status;
4601
4602 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4603 if (status < 0)
4604 goto xdr_error;
4605 fattr->valid |= status;
4606
4607 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4623 if (status < 0)
4624 goto xdr_error;
4625 fattr->valid |= status;
4626
4627 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4628 if (status < 0)
4629 goto xdr_error;
4630 fattr->valid |= status;
4631
4632 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4633 if (status < 0)
4634 goto xdr_error;
4635
4636 if (label) {
4637 status = decode_attr_security_label(xdr, bitmap, label);
4638 if (status < 0)
4639 goto xdr_error;
4640 fattr->valid |= status;
4641 }
4642
4643 xdr_error:
4644 dprintk("%s: xdr returned %d\n", __func__, -status);
4645 return status;
4646 }
4647
4648 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4649 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4650 struct nfs4_label *label, const struct nfs_server *server)
4651 {
4652 unsigned int savep;
4653 uint32_t attrlen,
4654 bitmap[3] = {0};
4655 int status;
4656
4657 status = decode_op_hdr(xdr, OP_GETATTR);
4658 if (status < 0)
4659 goto xdr_error;
4660
4661 status = decode_attr_bitmap(xdr, bitmap);
4662 if (status < 0)
4663 goto xdr_error;
4664
4665 status = decode_attr_length(xdr, &attrlen, &savep);
4666 if (status < 0)
4667 goto xdr_error;
4668
4669 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4670 label, server);
4671 if (status < 0)
4672 goto xdr_error;
4673
4674 status = verify_attr_len(xdr, savep, attrlen);
4675 xdr_error:
4676 dprintk("%s: xdr returned %d\n", __func__, -status);
4677 return status;
4678 }
4679
4680 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4681 struct nfs4_label *label, const struct nfs_server *server)
4682 {
4683 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4684 }
4685
4686 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4687 const struct nfs_server *server)
4688 {
4689 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4690 }
4691
4692 /*
4693 * Decode potentially multiple layout types. Currently we only support
4694 * one layout driver per file system.
4695 */
4696 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4697 uint32_t *layouttype)
4698 {
4699 __be32 *p;
4700 int num;
4701
4702 p = xdr_inline_decode(xdr, 4);
4703 if (unlikely(!p))
4704 goto out_overflow;
4705 num = be32_to_cpup(p);
4706
4707 /* pNFS is not supported by the underlying file system */
4708 if (num == 0) {
4709 *layouttype = 0;
4710 return 0;
4711 }
4712 if (num > 1)
4713 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4714 "drivers per filesystem not supported\n", __func__);
4715
4716 /* Decode and set first layout type, move xdr->p past unused types */
4717 p = xdr_inline_decode(xdr, num * 4);
4718 if (unlikely(!p))
4719 goto out_overflow;
4720 *layouttype = be32_to_cpup(p);
4721 return 0;
4722 out_overflow:
4723 print_overflow_msg(__func__, xdr);
4724 return -EIO;
4725 }
4726
4727 /*
4728 * The type of file system exported.
4729 * Note we must ensure that layouttype is set in any non-error case.
4730 */
4731 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4732 uint32_t *layouttype)
4733 {
4734 int status = 0;
4735
4736 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4737 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4738 return -EIO;
4739 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4740 status = decode_first_pnfs_layout_type(xdr, layouttype);
4741 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4742 } else
4743 *layouttype = 0;
4744 return status;
4745 }
4746
4747 /*
4748 * The prefered block size for layout directed io
4749 */
4750 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4751 uint32_t *res)
4752 {
4753 __be32 *p;
4754
4755 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4756 *res = 0;
4757 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4758 p = xdr_inline_decode(xdr, 4);
4759 if (unlikely(!p)) {
4760 print_overflow_msg(__func__, xdr);
4761 return -EIO;
4762 }
4763 *res = be32_to_cpup(p);
4764 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4765 }
4766 return 0;
4767 }
4768
4769 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4770 {
4771 unsigned int savep;
4772 uint32_t attrlen, bitmap[3];
4773 int status;
4774
4775 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4776 goto xdr_error;
4777 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4778 goto xdr_error;
4779 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4780 goto xdr_error;
4781
4782 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4783
4784 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4785 goto xdr_error;
4786 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4787 goto xdr_error;
4788 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4789 goto xdr_error;
4790 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4791 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4792 goto xdr_error;
4793 fsinfo->wtpref = fsinfo->wtmax;
4794 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4795 if (status != 0)
4796 goto xdr_error;
4797 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4798 if (status != 0)
4799 goto xdr_error;
4800 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4801 if (status)
4802 goto xdr_error;
4803
4804 status = verify_attr_len(xdr, savep, attrlen);
4805 xdr_error:
4806 dprintk("%s: xdr returned %d!\n", __func__, -status);
4807 return status;
4808 }
4809
4810 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4811 {
4812 __be32 *p;
4813 uint32_t len;
4814 int status;
4815
4816 /* Zero handle first to allow comparisons */
4817 memset(fh, 0, sizeof(*fh));
4818
4819 status = decode_op_hdr(xdr, OP_GETFH);
4820 if (status)
4821 return status;
4822
4823 p = xdr_inline_decode(xdr, 4);
4824 if (unlikely(!p))
4825 goto out_overflow;
4826 len = be32_to_cpup(p);
4827 if (len > NFS4_FHSIZE)
4828 return -EIO;
4829 fh->size = len;
4830 p = xdr_inline_decode(xdr, len);
4831 if (unlikely(!p))
4832 goto out_overflow;
4833 memcpy(fh->data, p, len);
4834 return 0;
4835 out_overflow:
4836 print_overflow_msg(__func__, xdr);
4837 return -EIO;
4838 }
4839
4840 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4841 {
4842 int status;
4843
4844 status = decode_op_hdr(xdr, OP_LINK);
4845 if (status)
4846 return status;
4847 return decode_change_info(xdr, cinfo);
4848 }
4849
4850 /*
4851 * We create the owner, so we know a proper owner.id length is 4.
4852 */
4853 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4854 {
4855 uint64_t offset, length, clientid;
4856 __be32 *p;
4857 uint32_t namelen, type;
4858
4859 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4860 if (unlikely(!p))
4861 goto out_overflow;
4862 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4863 p = xdr_decode_hyper(p, &length);
4864 type = be32_to_cpup(p++); /* 4 byte read */
4865 if (fl != NULL) { /* manipulate file lock */
4866 fl->fl_start = (loff_t)offset;
4867 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4868 if (length == ~(uint64_t)0)
4869 fl->fl_end = OFFSET_MAX;
4870 fl->fl_type = F_WRLCK;
4871 if (type & 1)
4872 fl->fl_type = F_RDLCK;
4873 fl->fl_pid = 0;
4874 }
4875 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4876 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4877 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4878 if (likely(p))
4879 return -NFS4ERR_DENIED;
4880 out_overflow:
4881 print_overflow_msg(__func__, xdr);
4882 return -EIO;
4883 }
4884
4885 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4886 {
4887 int status;
4888
4889 status = decode_op_hdr(xdr, OP_LOCK);
4890 if (status == -EIO)
4891 goto out;
4892 if (status == 0) {
4893 status = decode_stateid(xdr, &res->stateid);
4894 if (unlikely(status))
4895 goto out;
4896 } else if (status == -NFS4ERR_DENIED)
4897 status = decode_lock_denied(xdr, NULL);
4898 if (res->open_seqid != NULL)
4899 nfs_increment_open_seqid(status, res->open_seqid);
4900 nfs_increment_lock_seqid(status, res->lock_seqid);
4901 out:
4902 return status;
4903 }
4904
4905 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4906 {
4907 int status;
4908 status = decode_op_hdr(xdr, OP_LOCKT);
4909 if (status == -NFS4ERR_DENIED)
4910 return decode_lock_denied(xdr, res->denied);
4911 return status;
4912 }
4913
4914 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4915 {
4916 int status;
4917
4918 status = decode_op_hdr(xdr, OP_LOCKU);
4919 if (status != -EIO)
4920 nfs_increment_lock_seqid(status, res->seqid);
4921 if (status == 0)
4922 status = decode_stateid(xdr, &res->stateid);
4923 return status;
4924 }
4925
4926 static int decode_release_lockowner(struct xdr_stream *xdr)
4927 {
4928 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4929 }
4930
4931 static int decode_lookup(struct xdr_stream *xdr)
4932 {
4933 return decode_op_hdr(xdr, OP_LOOKUP);
4934 }
4935
4936 /* This is too sick! */
4937 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4938 {
4939 __be32 *p;
4940 uint32_t limit_type, nblocks, blocksize;
4941
4942 p = xdr_inline_decode(xdr, 12);
4943 if (unlikely(!p))
4944 goto out_overflow;
4945 limit_type = be32_to_cpup(p++);
4946 switch (limit_type) {
4947 case 1:
4948 xdr_decode_hyper(p, maxsize);
4949 break;
4950 case 2:
4951 nblocks = be32_to_cpup(p++);
4952 blocksize = be32_to_cpup(p);
4953 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4954 }
4955 return 0;
4956 out_overflow:
4957 print_overflow_msg(__func__, xdr);
4958 return -EIO;
4959 }
4960
4961 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4962 {
4963 __be32 *p;
4964 uint32_t delegation_type;
4965 int status;
4966
4967 p = xdr_inline_decode(xdr, 4);
4968 if (unlikely(!p))
4969 goto out_overflow;
4970 delegation_type = be32_to_cpup(p);
4971 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4972 res->delegation_type = 0;
4973 return 0;
4974 }
4975 status = decode_stateid(xdr, &res->delegation);
4976 if (unlikely(status))
4977 return status;
4978 p = xdr_inline_decode(xdr, 4);
4979 if (unlikely(!p))
4980 goto out_overflow;
4981 res->do_recall = be32_to_cpup(p);
4982
4983 switch (delegation_type) {
4984 case NFS4_OPEN_DELEGATE_READ:
4985 res->delegation_type = FMODE_READ;
4986 break;
4987 case NFS4_OPEN_DELEGATE_WRITE:
4988 res->delegation_type = FMODE_WRITE|FMODE_READ;
4989 if (decode_space_limit(xdr, &res->maxsize) < 0)
4990 return -EIO;
4991 }
4992 return decode_ace(xdr, NULL, res->server->nfs_client);
4993 out_overflow:
4994 print_overflow_msg(__func__, xdr);
4995 return -EIO;
4996 }
4997
4998 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4999 {
5000 __be32 *p;
5001 uint32_t savewords, bmlen, i;
5002 int status;
5003
5004 status = decode_op_hdr(xdr, OP_OPEN);
5005 if (status != -EIO)
5006 nfs_increment_open_seqid(status, res->seqid);
5007 if (!status)
5008 status = decode_stateid(xdr, &res->stateid);
5009 if (unlikely(status))
5010 return status;
5011
5012 decode_change_info(xdr, &res->cinfo);
5013
5014 p = xdr_inline_decode(xdr, 8);
5015 if (unlikely(!p))
5016 goto out_overflow;
5017 res->rflags = be32_to_cpup(p++);
5018 bmlen = be32_to_cpup(p);
5019 if (bmlen > 10)
5020 goto xdr_error;
5021
5022 p = xdr_inline_decode(xdr, bmlen << 2);
5023 if (unlikely(!p))
5024 goto out_overflow;
5025 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5026 for (i = 0; i < savewords; ++i)
5027 res->attrset[i] = be32_to_cpup(p++);
5028 for (; i < NFS4_BITMAP_SIZE; i++)
5029 res->attrset[i] = 0;
5030
5031 return decode_delegation(xdr, res);
5032 xdr_error:
5033 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5034 return -EIO;
5035 out_overflow:
5036 print_overflow_msg(__func__, xdr);
5037 return -EIO;
5038 }
5039
5040 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5041 {
5042 int status;
5043
5044 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5045 if (status != -EIO)
5046 nfs_increment_open_seqid(status, res->seqid);
5047 if (!status)
5048 status = decode_stateid(xdr, &res->stateid);
5049 return status;
5050 }
5051
5052 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5053 {
5054 int status;
5055
5056 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5057 if (status != -EIO)
5058 nfs_increment_open_seqid(status, res->seqid);
5059 if (!status)
5060 status = decode_stateid(xdr, &res->stateid);
5061 return status;
5062 }
5063
5064 static int decode_putfh(struct xdr_stream *xdr)
5065 {
5066 return decode_op_hdr(xdr, OP_PUTFH);
5067 }
5068
5069 static int decode_putrootfh(struct xdr_stream *xdr)
5070 {
5071 return decode_op_hdr(xdr, OP_PUTROOTFH);
5072 }
5073
5074 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5075 {
5076 __be32 *p;
5077 uint32_t count, eof, recvd;
5078 int status;
5079
5080 status = decode_op_hdr(xdr, OP_READ);
5081 if (status)
5082 return status;
5083 p = xdr_inline_decode(xdr, 8);
5084 if (unlikely(!p))
5085 goto out_overflow;
5086 eof = be32_to_cpup(p++);
5087 count = be32_to_cpup(p);
5088 recvd = xdr_read_pages(xdr, count);
5089 if (count > recvd) {
5090 dprintk("NFS: server cheating in read reply: "
5091 "count %u > recvd %u\n", count, recvd);
5092 count = recvd;
5093 eof = 0;
5094 }
5095 res->eof = eof;
5096 res->count = count;
5097 return 0;
5098 out_overflow:
5099 print_overflow_msg(__func__, xdr);
5100 return -EIO;
5101 }
5102
5103 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5104 {
5105 int status;
5106 __be32 verf[2];
5107
5108 status = decode_op_hdr(xdr, OP_READDIR);
5109 if (!status)
5110 status = decode_verifier(xdr, readdir->verifier.data);
5111 if (unlikely(status))
5112 return status;
5113 memcpy(verf, readdir->verifier.data, sizeof(verf));
5114 dprintk("%s: verifier = %08x:%08x\n",
5115 __func__, verf[0], verf[1]);
5116 return xdr_read_pages(xdr, xdr->buf->page_len);
5117 }
5118
5119 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5120 {
5121 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5122 u32 len, recvd;
5123 __be32 *p;
5124 int status;
5125
5126 status = decode_op_hdr(xdr, OP_READLINK);
5127 if (status)
5128 return status;
5129
5130 /* Convert length of symlink */
5131 p = xdr_inline_decode(xdr, 4);
5132 if (unlikely(!p))
5133 goto out_overflow;
5134 len = be32_to_cpup(p);
5135 if (len >= rcvbuf->page_len || len <= 0) {
5136 dprintk("nfs: server returned giant symlink!\n");
5137 return -ENAMETOOLONG;
5138 }
5139 recvd = xdr_read_pages(xdr, len);
5140 if (recvd < len) {
5141 dprintk("NFS: server cheating in readlink reply: "
5142 "count %u > recvd %u\n", len, recvd);
5143 return -EIO;
5144 }
5145 /*
5146 * The XDR encode routine has set things up so that
5147 * the link text will be copied directly into the
5148 * buffer. We just have to do overflow-checking,
5149 * and and null-terminate the text (the VFS expects
5150 * null-termination).
5151 */
5152 xdr_terminate_string(rcvbuf, len);
5153 return 0;
5154 out_overflow:
5155 print_overflow_msg(__func__, xdr);
5156 return -EIO;
5157 }
5158
5159 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5160 {
5161 int status;
5162
5163 status = decode_op_hdr(xdr, OP_REMOVE);
5164 if (status)
5165 goto out;
5166 status = decode_change_info(xdr, cinfo);
5167 out:
5168 return status;
5169 }
5170
5171 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5172 struct nfs4_change_info *new_cinfo)
5173 {
5174 int status;
5175
5176 status = decode_op_hdr(xdr, OP_RENAME);
5177 if (status)
5178 goto out;
5179 if ((status = decode_change_info(xdr, old_cinfo)))
5180 goto out;
5181 status = decode_change_info(xdr, new_cinfo);
5182 out:
5183 return status;
5184 }
5185
5186 static int decode_renew(struct xdr_stream *xdr)
5187 {
5188 return decode_op_hdr(xdr, OP_RENEW);
5189 }
5190
5191 static int
5192 decode_restorefh(struct xdr_stream *xdr)
5193 {
5194 return decode_op_hdr(xdr, OP_RESTOREFH);
5195 }
5196
5197 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5198 struct nfs_getaclres *res)
5199 {
5200 unsigned int savep;
5201 uint32_t attrlen,
5202 bitmap[3] = {0};
5203 int status;
5204 unsigned int pg_offset;
5205
5206 res->acl_len = 0;
5207 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5208 goto out;
5209
5210 xdr_enter_page(xdr, xdr->buf->page_len);
5211
5212 /* Calculate the offset of the page data */
5213 pg_offset = xdr->buf->head[0].iov_len;
5214
5215 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5216 goto out;
5217 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5218 goto out;
5219
5220 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5221 return -EIO;
5222 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5223
5224 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5225 * are stored with the acl data to handle the problem of
5226 * variable length bitmaps.*/
5227 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5228 res->acl_len = attrlen;
5229
5230 /* Check for receive buffer overflow */
5231 if (res->acl_len > (xdr->nwords << 2) ||
5232 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5233 res->acl_flags |= NFS4_ACL_TRUNC;
5234 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5235 attrlen, xdr->nwords << 2);
5236 }
5237 } else
5238 status = -EOPNOTSUPP;
5239
5240 out:
5241 return status;
5242 }
5243
5244 static int
5245 decode_savefh(struct xdr_stream *xdr)
5246 {
5247 return decode_op_hdr(xdr, OP_SAVEFH);
5248 }
5249
5250 static int decode_setattr(struct xdr_stream *xdr)
5251 {
5252 __be32 *p;
5253 uint32_t bmlen;
5254 int status;
5255
5256 status = decode_op_hdr(xdr, OP_SETATTR);
5257 if (status)
5258 return status;
5259 p = xdr_inline_decode(xdr, 4);
5260 if (unlikely(!p))
5261 goto out_overflow;
5262 bmlen = be32_to_cpup(p);
5263 p = xdr_inline_decode(xdr, bmlen << 2);
5264 if (likely(p))
5265 return 0;
5266 out_overflow:
5267 print_overflow_msg(__func__, xdr);
5268 return -EIO;
5269 }
5270
5271 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5272 {
5273 __be32 *p;
5274 uint32_t opnum;
5275 int32_t nfserr;
5276
5277 p = xdr_inline_decode(xdr, 8);
5278 if (unlikely(!p))
5279 goto out_overflow;
5280 opnum = be32_to_cpup(p++);
5281 if (opnum != OP_SETCLIENTID) {
5282 dprintk("nfs: decode_setclientid: Server returned operation"
5283 " %d\n", opnum);
5284 return -EIO;
5285 }
5286 nfserr = be32_to_cpup(p);
5287 if (nfserr == NFS_OK) {
5288 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5289 if (unlikely(!p))
5290 goto out_overflow;
5291 p = xdr_decode_hyper(p, &res->clientid);
5292 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5293 } else if (nfserr == NFSERR_CLID_INUSE) {
5294 uint32_t len;
5295
5296 /* skip netid string */
5297 p = xdr_inline_decode(xdr, 4);
5298 if (unlikely(!p))
5299 goto out_overflow;
5300 len = be32_to_cpup(p);
5301 p = xdr_inline_decode(xdr, len);
5302 if (unlikely(!p))
5303 goto out_overflow;
5304
5305 /* skip uaddr string */
5306 p = xdr_inline_decode(xdr, 4);
5307 if (unlikely(!p))
5308 goto out_overflow;
5309 len = be32_to_cpup(p);
5310 p = xdr_inline_decode(xdr, len);
5311 if (unlikely(!p))
5312 goto out_overflow;
5313 return -NFSERR_CLID_INUSE;
5314 } else
5315 return nfs4_stat_to_errno(nfserr);
5316
5317 return 0;
5318 out_overflow:
5319 print_overflow_msg(__func__, xdr);
5320 return -EIO;
5321 }
5322
5323 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5324 {
5325 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5326 }
5327
5328 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5329 {
5330 __be32 *p;
5331 int status;
5332
5333 status = decode_op_hdr(xdr, OP_WRITE);
5334 if (status)
5335 return status;
5336
5337 p = xdr_inline_decode(xdr, 8);
5338 if (unlikely(!p))
5339 goto out_overflow;
5340 res->count = be32_to_cpup(p++);
5341 res->verf->committed = be32_to_cpup(p++);
5342 return decode_write_verifier(xdr, &res->verf->verifier);
5343 out_overflow:
5344 print_overflow_msg(__func__, xdr);
5345 return -EIO;
5346 }
5347
5348 static int decode_delegreturn(struct xdr_stream *xdr)
5349 {
5350 return decode_op_hdr(xdr, OP_DELEGRETURN);
5351 }
5352
5353 static int decode_secinfo_gss(struct xdr_stream *xdr,
5354 struct nfs4_secinfo4 *flavor)
5355 {
5356 u32 oid_len;
5357 __be32 *p;
5358
5359 p = xdr_inline_decode(xdr, 4);
5360 if (unlikely(!p))
5361 goto out_overflow;
5362 oid_len = be32_to_cpup(p);
5363 if (oid_len > GSS_OID_MAX_LEN)
5364 goto out_err;
5365
5366 p = xdr_inline_decode(xdr, oid_len);
5367 if (unlikely(!p))
5368 goto out_overflow;
5369 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5370 flavor->flavor_info.oid.len = oid_len;
5371
5372 p = xdr_inline_decode(xdr, 8);
5373 if (unlikely(!p))
5374 goto out_overflow;
5375 flavor->flavor_info.qop = be32_to_cpup(p++);
5376 flavor->flavor_info.service = be32_to_cpup(p);
5377
5378 return 0;
5379
5380 out_overflow:
5381 print_overflow_msg(__func__, xdr);
5382 return -EIO;
5383 out_err:
5384 return -EINVAL;
5385 }
5386
5387 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5388 {
5389 struct nfs4_secinfo4 *sec_flavor;
5390 unsigned int i, num_flavors;
5391 int status;
5392 __be32 *p;
5393
5394 p = xdr_inline_decode(xdr, 4);
5395 if (unlikely(!p))
5396 goto out_overflow;
5397
5398 res->flavors->num_flavors = 0;
5399 num_flavors = be32_to_cpup(p);
5400
5401 for (i = 0; i < num_flavors; i++) {
5402 sec_flavor = &res->flavors->flavors[i];
5403 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5404 break;
5405
5406 p = xdr_inline_decode(xdr, 4);
5407 if (unlikely(!p))
5408 goto out_overflow;
5409 sec_flavor->flavor = be32_to_cpup(p);
5410
5411 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5412 status = decode_secinfo_gss(xdr, sec_flavor);
5413 if (status)
5414 goto out;
5415 }
5416 res->flavors->num_flavors++;
5417 }
5418
5419 status = 0;
5420 out:
5421 return status;
5422 out_overflow:
5423 print_overflow_msg(__func__, xdr);
5424 return -EIO;
5425 }
5426
5427 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5428 {
5429 int status = decode_op_hdr(xdr, OP_SECINFO);
5430 if (status)
5431 return status;
5432 return decode_secinfo_common(xdr, res);
5433 }
5434
5435 #if defined(CONFIG_NFS_V4_1)
5436 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5437 {
5438 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5439 if (status)
5440 return status;
5441 return decode_secinfo_common(xdr, res);
5442 }
5443
5444 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5445 {
5446 __be32 *p;
5447 uint32_t bitmap_words;
5448 unsigned int i;
5449
5450 p = xdr_inline_decode(xdr, 4);
5451 bitmap_words = be32_to_cpup(p++);
5452 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5453 return -EIO;
5454 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5455 for (i = 0; i < bitmap_words; i++)
5456 op_map->u.words[i] = be32_to_cpup(p++);
5457
5458 return 0;
5459 }
5460
5461 static int decode_exchange_id(struct xdr_stream *xdr,
5462 struct nfs41_exchange_id_res *res)
5463 {
5464 __be32 *p;
5465 uint32_t dummy;
5466 char *dummy_str;
5467 int status;
5468 uint32_t impl_id_count;
5469
5470 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5471 if (status)
5472 return status;
5473
5474 p = xdr_inline_decode(xdr, 8);
5475 if (unlikely(!p))
5476 goto out_overflow;
5477 xdr_decode_hyper(p, &res->clientid);
5478 p = xdr_inline_decode(xdr, 12);
5479 if (unlikely(!p))
5480 goto out_overflow;
5481 res->seqid = be32_to_cpup(p++);
5482 res->flags = be32_to_cpup(p++);
5483
5484 res->state_protect.how = be32_to_cpup(p);
5485 switch (res->state_protect.how) {
5486 case SP4_NONE:
5487 break;
5488 case SP4_MACH_CRED:
5489 status = decode_op_map(xdr, &res->state_protect.enforce);
5490 if (status)
5491 return status;
5492 status = decode_op_map(xdr, &res->state_protect.allow);
5493 if (status)
5494 return status;
5495 break;
5496 default:
5497 WARN_ON_ONCE(1);
5498 return -EIO;
5499 }
5500
5501 /* server_owner4.so_minor_id */
5502 p = xdr_inline_decode(xdr, 8);
5503 if (unlikely(!p))
5504 goto out_overflow;
5505 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5506
5507 /* server_owner4.so_major_id */
5508 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5509 if (unlikely(status))
5510 return status;
5511 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5512 return -EIO;
5513 memcpy(res->server_owner->major_id, dummy_str, dummy);
5514 res->server_owner->major_id_sz = dummy;
5515
5516 /* server_scope4 */
5517 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5518 if (unlikely(status))
5519 return status;
5520 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5521 return -EIO;
5522 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5523 res->server_scope->server_scope_sz = dummy;
5524
5525 /* Implementation Id */
5526 p = xdr_inline_decode(xdr, 4);
5527 if (unlikely(!p))
5528 goto out_overflow;
5529 impl_id_count = be32_to_cpup(p++);
5530
5531 if (impl_id_count) {
5532 /* nii_domain */
5533 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5534 if (unlikely(status))
5535 return status;
5536 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5537 return -EIO;
5538 memcpy(res->impl_id->domain, dummy_str, dummy);
5539
5540 /* nii_name */
5541 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5542 if (unlikely(status))
5543 return status;
5544 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5545 return -EIO;
5546 memcpy(res->impl_id->name, dummy_str, dummy);
5547
5548 /* nii_date */
5549 p = xdr_inline_decode(xdr, 12);
5550 if (unlikely(!p))
5551 goto out_overflow;
5552 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5553 res->impl_id->date.nseconds = be32_to_cpup(p);
5554
5555 /* if there's more than one entry, ignore the rest */
5556 }
5557 return 0;
5558 out_overflow:
5559 print_overflow_msg(__func__, xdr);
5560 return -EIO;
5561 }
5562
5563 static int decode_chan_attrs(struct xdr_stream *xdr,
5564 struct nfs4_channel_attrs *attrs)
5565 {
5566 __be32 *p;
5567 u32 nr_attrs, val;
5568
5569 p = xdr_inline_decode(xdr, 28);
5570 if (unlikely(!p))
5571 goto out_overflow;
5572 val = be32_to_cpup(p++); /* headerpadsz */
5573 if (val)
5574 return -EINVAL; /* no support for header padding yet */
5575 attrs->max_rqst_sz = be32_to_cpup(p++);
5576 attrs->max_resp_sz = be32_to_cpup(p++);
5577 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5578 attrs->max_ops = be32_to_cpup(p++);
5579 attrs->max_reqs = be32_to_cpup(p++);
5580 nr_attrs = be32_to_cpup(p);
5581 if (unlikely(nr_attrs > 1)) {
5582 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5583 "count %u\n", __func__, nr_attrs);
5584 return -EINVAL;
5585 }
5586 if (nr_attrs == 1) {
5587 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5588 if (unlikely(!p))
5589 goto out_overflow;
5590 }
5591 return 0;
5592 out_overflow:
5593 print_overflow_msg(__func__, xdr);
5594 return -EIO;
5595 }
5596
5597 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5598 {
5599 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5600 }
5601
5602 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5603 struct nfs41_bind_conn_to_session_res *res)
5604 {
5605 __be32 *p;
5606 int status;
5607
5608 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5609 if (!status)
5610 status = decode_sessionid(xdr, &res->session->sess_id);
5611 if (unlikely(status))
5612 return status;
5613
5614 /* dir flags, rdma mode bool */
5615 p = xdr_inline_decode(xdr, 8);
5616 if (unlikely(!p))
5617 goto out_overflow;
5618
5619 res->dir = be32_to_cpup(p++);
5620 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5621 return -EIO;
5622 if (be32_to_cpup(p) == 0)
5623 res->use_conn_in_rdma_mode = false;
5624 else
5625 res->use_conn_in_rdma_mode = true;
5626
5627 return 0;
5628 out_overflow:
5629 print_overflow_msg(__func__, xdr);
5630 return -EIO;
5631 }
5632
5633 static int decode_create_session(struct xdr_stream *xdr,
5634 struct nfs41_create_session_res *res)
5635 {
5636 __be32 *p;
5637 int status;
5638 struct nfs_client *clp = res->client;
5639 struct nfs4_session *session = clp->cl_session;
5640
5641 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5642 if (!status)
5643 status = decode_sessionid(xdr, &session->sess_id);
5644 if (unlikely(status))
5645 return status;
5646
5647 /* seqid, flags */
5648 p = xdr_inline_decode(xdr, 8);
5649 if (unlikely(!p))
5650 goto out_overflow;
5651 clp->cl_seqid = be32_to_cpup(p++);
5652 session->flags = be32_to_cpup(p);
5653
5654 /* Channel attributes */
5655 status = decode_chan_attrs(xdr, &session->fc_attrs);
5656 if (!status)
5657 status = decode_chan_attrs(xdr, &session->bc_attrs);
5658 return status;
5659 out_overflow:
5660 print_overflow_msg(__func__, xdr);
5661 return -EIO;
5662 }
5663
5664 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5665 {
5666 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5667 }
5668
5669 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5670 {
5671 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5672 }
5673
5674 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5675 {
5676 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5677 }
5678 #endif /* CONFIG_NFS_V4_1 */
5679
5680 static int decode_sequence(struct xdr_stream *xdr,
5681 struct nfs4_sequence_res *res,
5682 struct rpc_rqst *rqstp)
5683 {
5684 #if defined(CONFIG_NFS_V4_1)
5685 struct nfs4_session *session;
5686 struct nfs4_sessionid id;
5687 u32 dummy;
5688 int status;
5689 __be32 *p;
5690
5691 if (res->sr_slot == NULL)
5692 return 0;
5693 if (!res->sr_slot->table->session)
5694 return 0;
5695
5696 status = decode_op_hdr(xdr, OP_SEQUENCE);
5697 if (!status)
5698 status = decode_sessionid(xdr, &id);
5699 if (unlikely(status))
5700 goto out_err;
5701
5702 /*
5703 * If the server returns different values for sessionID, slotID or
5704 * sequence number, the server is looney tunes.
5705 */
5706 status = -EREMOTEIO;
5707 session = res->sr_slot->table->session;
5708
5709 if (memcmp(id.data, session->sess_id.data,
5710 NFS4_MAX_SESSIONID_LEN)) {
5711 dprintk("%s Invalid session id\n", __func__);
5712 goto out_err;
5713 }
5714
5715 p = xdr_inline_decode(xdr, 20);
5716 if (unlikely(!p))
5717 goto out_overflow;
5718
5719 /* seqid */
5720 dummy = be32_to_cpup(p++);
5721 if (dummy != res->sr_slot->seq_nr) {
5722 dprintk("%s Invalid sequence number\n", __func__);
5723 goto out_err;
5724 }
5725 /* slot id */
5726 dummy = be32_to_cpup(p++);
5727 if (dummy != res->sr_slot->slot_nr) {
5728 dprintk("%s Invalid slot id\n", __func__);
5729 goto out_err;
5730 }
5731 /* highest slot id */
5732 res->sr_highest_slotid = be32_to_cpup(p++);
5733 /* target highest slot id */
5734 res->sr_target_highest_slotid = be32_to_cpup(p++);
5735 /* result flags */
5736 res->sr_status_flags = be32_to_cpup(p);
5737 status = 0;
5738 out_err:
5739 res->sr_status = status;
5740 return status;
5741 out_overflow:
5742 print_overflow_msg(__func__, xdr);
5743 status = -EIO;
5744 goto out_err;
5745 #else /* CONFIG_NFS_V4_1 */
5746 return 0;
5747 #endif /* CONFIG_NFS_V4_1 */
5748 }
5749
5750 #if defined(CONFIG_NFS_V4_1)
5751 /*
5752 * TODO: Need to handle case when EOF != true;
5753 */
5754 static int decode_getdevicelist(struct xdr_stream *xdr,
5755 struct pnfs_devicelist *res)
5756 {
5757 __be32 *p;
5758 int status, i;
5759 nfs4_verifier verftemp;
5760
5761 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5762 if (status)
5763 return status;
5764
5765 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5766 if (unlikely(!p))
5767 goto out_overflow;
5768
5769 /* TODO: Skip cookie for now */
5770 p += 2;
5771
5772 /* Read verifier */
5773 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5774
5775 res->num_devs = be32_to_cpup(p);
5776
5777 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5778
5779 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5780 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5781 __func__, res->num_devs);
5782 return -EIO;
5783 }
5784
5785 p = xdr_inline_decode(xdr,
5786 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5787 if (unlikely(!p))
5788 goto out_overflow;
5789 for (i = 0; i < res->num_devs; i++)
5790 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5791 NFS4_DEVICEID4_SIZE);
5792 res->eof = be32_to_cpup(p);
5793 return 0;
5794 out_overflow:
5795 print_overflow_msg(__func__, xdr);
5796 return -EIO;
5797 }
5798
5799 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5800 struct pnfs_device *pdev)
5801 {
5802 __be32 *p;
5803 uint32_t len, type;
5804 int status;
5805
5806 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5807 if (status) {
5808 if (status == -ETOOSMALL) {
5809 p = xdr_inline_decode(xdr, 4);
5810 if (unlikely(!p))
5811 goto out_overflow;
5812 pdev->mincount = be32_to_cpup(p);
5813 dprintk("%s: Min count too small. mincnt = %u\n",
5814 __func__, pdev->mincount);
5815 }
5816 return status;
5817 }
5818
5819 p = xdr_inline_decode(xdr, 8);
5820 if (unlikely(!p))
5821 goto out_overflow;
5822 type = be32_to_cpup(p++);
5823 if (type != pdev->layout_type) {
5824 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5825 __func__, pdev->layout_type, type);
5826 return -EINVAL;
5827 }
5828 /*
5829 * Get the length of the opaque device_addr4. xdr_read_pages places
5830 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5831 * and places the remaining xdr data in xdr_buf->tail
5832 */
5833 pdev->mincount = be32_to_cpup(p);
5834 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5835 goto out_overflow;
5836
5837 /* Parse notification bitmap, verifying that it is zero. */
5838 p = xdr_inline_decode(xdr, 4);
5839 if (unlikely(!p))
5840 goto out_overflow;
5841 len = be32_to_cpup(p);
5842 if (len) {
5843 uint32_t i;
5844
5845 p = xdr_inline_decode(xdr, 4 * len);
5846 if (unlikely(!p))
5847 goto out_overflow;
5848 for (i = 0; i < len; i++, p++) {
5849 if (be32_to_cpup(p)) {
5850 dprintk("%s: notifications not supported\n",
5851 __func__);
5852 return -EIO;
5853 }
5854 }
5855 }
5856 return 0;
5857 out_overflow:
5858 print_overflow_msg(__func__, xdr);
5859 return -EIO;
5860 }
5861
5862 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5863 struct nfs4_layoutget_res *res)
5864 {
5865 __be32 *p;
5866 int status;
5867 u32 layout_count;
5868 u32 recvd;
5869
5870 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5871 if (status)
5872 return status;
5873 p = xdr_inline_decode(xdr, 4);
5874 if (unlikely(!p))
5875 goto out_overflow;
5876 res->return_on_close = be32_to_cpup(p);
5877 decode_stateid(xdr, &res->stateid);
5878 p = xdr_inline_decode(xdr, 4);
5879 if (unlikely(!p))
5880 goto out_overflow;
5881 layout_count = be32_to_cpup(p);
5882 if (!layout_count) {
5883 dprintk("%s: server responded with empty layout array\n",
5884 __func__);
5885 return -EINVAL;
5886 }
5887
5888 p = xdr_inline_decode(xdr, 28);
5889 if (unlikely(!p))
5890 goto out_overflow;
5891 p = xdr_decode_hyper(p, &res->range.offset);
5892 p = xdr_decode_hyper(p, &res->range.length);
5893 res->range.iomode = be32_to_cpup(p++);
5894 res->type = be32_to_cpup(p++);
5895 res->layoutp->len = be32_to_cpup(p);
5896
5897 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5898 __func__,
5899 (unsigned long)res->range.offset,
5900 (unsigned long)res->range.length,
5901 res->range.iomode,
5902 res->type,
5903 res->layoutp->len);
5904
5905 recvd = xdr_read_pages(xdr, res->layoutp->len);
5906 if (res->layoutp->len > recvd) {
5907 dprintk("NFS: server cheating in layoutget reply: "
5908 "layout len %u > recvd %u\n",
5909 res->layoutp->len, recvd);
5910 return -EINVAL;
5911 }
5912
5913 if (layout_count > 1) {
5914 /* We only handle a length one array at the moment. Any
5915 * further entries are just ignored. Note that this means
5916 * the client may see a response that is less than the
5917 * minimum it requested.
5918 */
5919 dprintk("%s: server responded with %d layouts, dropping tail\n",
5920 __func__, layout_count);
5921 }
5922
5923 return 0;
5924 out_overflow:
5925 print_overflow_msg(__func__, xdr);
5926 return -EIO;
5927 }
5928
5929 static int decode_layoutreturn(struct xdr_stream *xdr,
5930 struct nfs4_layoutreturn_res *res)
5931 {
5932 __be32 *p;
5933 int status;
5934
5935 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5936 if (status)
5937 return status;
5938 p = xdr_inline_decode(xdr, 4);
5939 if (unlikely(!p))
5940 goto out_overflow;
5941 res->lrs_present = be32_to_cpup(p);
5942 if (res->lrs_present)
5943 status = decode_stateid(xdr, &res->stateid);
5944 return status;
5945 out_overflow:
5946 print_overflow_msg(__func__, xdr);
5947 return -EIO;
5948 }
5949
5950 static int decode_layoutcommit(struct xdr_stream *xdr,
5951 struct rpc_rqst *req,
5952 struct nfs4_layoutcommit_res *res)
5953 {
5954 __be32 *p;
5955 __u32 sizechanged;
5956 int status;
5957
5958 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5959 res->status = status;
5960 if (status)
5961 return status;
5962
5963 p = xdr_inline_decode(xdr, 4);
5964 if (unlikely(!p))
5965 goto out_overflow;
5966 sizechanged = be32_to_cpup(p);
5967
5968 if (sizechanged) {
5969 /* throw away new size */
5970 p = xdr_inline_decode(xdr, 8);
5971 if (unlikely(!p))
5972 goto out_overflow;
5973 }
5974 return 0;
5975 out_overflow:
5976 print_overflow_msg(__func__, xdr);
5977 return -EIO;
5978 }
5979
5980 static int decode_test_stateid(struct xdr_stream *xdr,
5981 struct nfs41_test_stateid_res *res)
5982 {
5983 __be32 *p;
5984 int status;
5985 int num_res;
5986
5987 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5988 if (status)
5989 return status;
5990
5991 p = xdr_inline_decode(xdr, 4);
5992 if (unlikely(!p))
5993 goto out_overflow;
5994 num_res = be32_to_cpup(p++);
5995 if (num_res != 1)
5996 goto out;
5997
5998 p = xdr_inline_decode(xdr, 4);
5999 if (unlikely(!p))
6000 goto out_overflow;
6001 res->status = be32_to_cpup(p++);
6002
6003 return status;
6004 out_overflow:
6005 print_overflow_msg(__func__, xdr);
6006 out:
6007 return -EIO;
6008 }
6009
6010 static int decode_free_stateid(struct xdr_stream *xdr,
6011 struct nfs41_free_stateid_res *res)
6012 {
6013 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6014 return res->status;
6015 }
6016 #endif /* CONFIG_NFS_V4_1 */
6017
6018 /*
6019 * END OF "GENERIC" DECODE ROUTINES.
6020 */
6021
6022 /*
6023 * Decode OPEN_DOWNGRADE response
6024 */
6025 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6026 struct xdr_stream *xdr,
6027 struct nfs_closeres *res)
6028 {
6029 struct compound_hdr hdr;
6030 int status;
6031
6032 status = decode_compound_hdr(xdr, &hdr);
6033 if (status)
6034 goto out;
6035 status = decode_sequence(xdr, &res->seq_res, rqstp);
6036 if (status)
6037 goto out;
6038 status = decode_putfh(xdr);
6039 if (status)
6040 goto out;
6041 status = decode_open_downgrade(xdr, res);
6042 if (status != 0)
6043 goto out;
6044 decode_getfattr(xdr, res->fattr, res->server);
6045 out:
6046 return status;
6047 }
6048
6049 /*
6050 * Decode ACCESS response
6051 */
6052 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6053 struct nfs4_accessres *res)
6054 {
6055 struct compound_hdr hdr;
6056 int status;
6057
6058 status = decode_compound_hdr(xdr, &hdr);
6059 if (status)
6060 goto out;
6061 status = decode_sequence(xdr, &res->seq_res, rqstp);
6062 if (status)
6063 goto out;
6064 status = decode_putfh(xdr);
6065 if (status != 0)
6066 goto out;
6067 status = decode_access(xdr, &res->supported, &res->access);
6068 if (status != 0)
6069 goto out;
6070 decode_getfattr(xdr, res->fattr, res->server);
6071 out:
6072 return status;
6073 }
6074
6075 /*
6076 * Decode LOOKUP response
6077 */
6078 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6079 struct nfs4_lookup_res *res)
6080 {
6081 struct compound_hdr hdr;
6082 int status;
6083
6084 status = decode_compound_hdr(xdr, &hdr);
6085 if (status)
6086 goto out;
6087 status = decode_sequence(xdr, &res->seq_res, rqstp);
6088 if (status)
6089 goto out;
6090 status = decode_putfh(xdr);
6091 if (status)
6092 goto out;
6093 status = decode_lookup(xdr);
6094 if (status)
6095 goto out;
6096 status = decode_getfh(xdr, res->fh);
6097 if (status)
6098 goto out;
6099 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6100 out:
6101 return status;
6102 }
6103
6104 /*
6105 * Decode LOOKUP_ROOT response
6106 */
6107 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6108 struct xdr_stream *xdr,
6109 struct nfs4_lookup_res *res)
6110 {
6111 struct compound_hdr hdr;
6112 int status;
6113
6114 status = decode_compound_hdr(xdr, &hdr);
6115 if (status)
6116 goto out;
6117 status = decode_sequence(xdr, &res->seq_res, rqstp);
6118 if (status)
6119 goto out;
6120 status = decode_putrootfh(xdr);
6121 if (status)
6122 goto out;
6123 status = decode_getfh(xdr, res->fh);
6124 if (status == 0)
6125 status = decode_getfattr_label(xdr, res->fattr,
6126 res->label, res->server);
6127 out:
6128 return status;
6129 }
6130
6131 /*
6132 * Decode REMOVE response
6133 */
6134 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6135 struct nfs_removeres *res)
6136 {
6137 struct compound_hdr hdr;
6138 int status;
6139
6140 status = decode_compound_hdr(xdr, &hdr);
6141 if (status)
6142 goto out;
6143 status = decode_sequence(xdr, &res->seq_res, rqstp);
6144 if (status)
6145 goto out;
6146 status = decode_putfh(xdr);
6147 if (status)
6148 goto out;
6149 status = decode_remove(xdr, &res->cinfo);
6150 out:
6151 return status;
6152 }
6153
6154 /*
6155 * Decode RENAME response
6156 */
6157 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6158 struct nfs_renameres *res)
6159 {
6160 struct compound_hdr hdr;
6161 int status;
6162
6163 status = decode_compound_hdr(xdr, &hdr);
6164 if (status)
6165 goto out;
6166 status = decode_sequence(xdr, &res->seq_res, rqstp);
6167 if (status)
6168 goto out;
6169 status = decode_putfh(xdr);
6170 if (status)
6171 goto out;
6172 status = decode_savefh(xdr);
6173 if (status)
6174 goto out;
6175 status = decode_putfh(xdr);
6176 if (status)
6177 goto out;
6178 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6179 out:
6180 return status;
6181 }
6182
6183 /*
6184 * Decode LINK response
6185 */
6186 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6187 struct nfs4_link_res *res)
6188 {
6189 struct compound_hdr hdr;
6190 int status;
6191
6192 status = decode_compound_hdr(xdr, &hdr);
6193 if (status)
6194 goto out;
6195 status = decode_sequence(xdr, &res->seq_res, rqstp);
6196 if (status)
6197 goto out;
6198 status = decode_putfh(xdr);
6199 if (status)
6200 goto out;
6201 status = decode_savefh(xdr);
6202 if (status)
6203 goto out;
6204 status = decode_putfh(xdr);
6205 if (status)
6206 goto out;
6207 status = decode_link(xdr, &res->cinfo);
6208 if (status)
6209 goto out;
6210 /*
6211 * Note order: OP_LINK leaves the directory as the current
6212 * filehandle.
6213 */
6214 status = decode_restorefh(xdr);
6215 if (status)
6216 goto out;
6217 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6218 out:
6219 return status;
6220 }
6221
6222 /*
6223 * Decode CREATE response
6224 */
6225 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226 struct nfs4_create_res *res)
6227 {
6228 struct compound_hdr hdr;
6229 int status;
6230
6231 status = decode_compound_hdr(xdr, &hdr);
6232 if (status)
6233 goto out;
6234 status = decode_sequence(xdr, &res->seq_res, rqstp);
6235 if (status)
6236 goto out;
6237 status = decode_putfh(xdr);
6238 if (status)
6239 goto out;
6240 status = decode_create(xdr, &res->dir_cinfo);
6241 if (status)
6242 goto out;
6243 status = decode_getfh(xdr, res->fh);
6244 if (status)
6245 goto out;
6246 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6247 out:
6248 return status;
6249 }
6250
6251 /*
6252 * Decode SYMLINK response
6253 */
6254 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6255 struct nfs4_create_res *res)
6256 {
6257 return nfs4_xdr_dec_create(rqstp, xdr, res);
6258 }
6259
6260 /*
6261 * Decode GETATTR response
6262 */
6263 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264 struct nfs4_getattr_res *res)
6265 {
6266 struct compound_hdr hdr;
6267 int status;
6268
6269 status = decode_compound_hdr(xdr, &hdr);
6270 if (status)
6271 goto out;
6272 status = decode_sequence(xdr, &res->seq_res, rqstp);
6273 if (status)
6274 goto out;
6275 status = decode_putfh(xdr);
6276 if (status)
6277 goto out;
6278 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6279 out:
6280 return status;
6281 }
6282
6283 /*
6284 * Encode an SETACL request
6285 */
6286 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6287 struct nfs_setaclargs *args)
6288 {
6289 struct compound_hdr hdr = {
6290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6291 };
6292
6293 encode_compound_hdr(xdr, req, &hdr);
6294 encode_sequence(xdr, &args->seq_args, &hdr);
6295 encode_putfh(xdr, args->fh, &hdr);
6296 encode_setacl(xdr, args, &hdr);
6297 encode_nops(&hdr);
6298 }
6299
6300 /*
6301 * Decode SETACL response
6302 */
6303 static int
6304 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6305 struct nfs_setaclres *res)
6306 {
6307 struct compound_hdr hdr;
6308 int status;
6309
6310 status = decode_compound_hdr(xdr, &hdr);
6311 if (status)
6312 goto out;
6313 status = decode_sequence(xdr, &res->seq_res, rqstp);
6314 if (status)
6315 goto out;
6316 status = decode_putfh(xdr);
6317 if (status)
6318 goto out;
6319 status = decode_setattr(xdr);
6320 out:
6321 return status;
6322 }
6323
6324 /*
6325 * Decode GETACL response
6326 */
6327 static int
6328 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329 struct nfs_getaclres *res)
6330 {
6331 struct compound_hdr hdr;
6332 int status;
6333
6334 if (res->acl_scratch != NULL) {
6335 void *p = page_address(res->acl_scratch);
6336 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6337 }
6338 status = decode_compound_hdr(xdr, &hdr);
6339 if (status)
6340 goto out;
6341 status = decode_sequence(xdr, &res->seq_res, rqstp);
6342 if (status)
6343 goto out;
6344 status = decode_putfh(xdr);
6345 if (status)
6346 goto out;
6347 status = decode_getacl(xdr, rqstp, res);
6348
6349 out:
6350 return status;
6351 }
6352
6353 /*
6354 * Decode CLOSE response
6355 */
6356 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6357 struct nfs_closeres *res)
6358 {
6359 struct compound_hdr hdr;
6360 int status;
6361
6362 status = decode_compound_hdr(xdr, &hdr);
6363 if (status)
6364 goto out;
6365 status = decode_sequence(xdr, &res->seq_res, rqstp);
6366 if (status)
6367 goto out;
6368 status = decode_putfh(xdr);
6369 if (status)
6370 goto out;
6371 status = decode_close(xdr, res);
6372 if (status != 0)
6373 goto out;
6374 /*
6375 * Note: Server may do delete on close for this file
6376 * in which case the getattr call will fail with
6377 * an ESTALE error. Shouldn't be a problem,
6378 * though, since fattr->valid will remain unset.
6379 */
6380 decode_getfattr(xdr, res->fattr, res->server);
6381 out:
6382 return status;
6383 }
6384
6385 /*
6386 * Decode OPEN response
6387 */
6388 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6389 struct nfs_openres *res)
6390 {
6391 struct compound_hdr hdr;
6392 int status;
6393
6394 status = decode_compound_hdr(xdr, &hdr);
6395 if (status)
6396 goto out;
6397 status = decode_sequence(xdr, &res->seq_res, rqstp);
6398 if (status)
6399 goto out;
6400 status = decode_putfh(xdr);
6401 if (status)
6402 goto out;
6403 status = decode_open(xdr, res);
6404 if (status)
6405 goto out;
6406 status = decode_getfh(xdr, &res->fh);
6407 if (status)
6408 goto out;
6409 if (res->access_request)
6410 decode_access(xdr, &res->access_supported, &res->access_result);
6411 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6412 out:
6413 return status;
6414 }
6415
6416 /*
6417 * Decode OPEN_CONFIRM response
6418 */
6419 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6420 struct xdr_stream *xdr,
6421 struct nfs_open_confirmres *res)
6422 {
6423 struct compound_hdr hdr;
6424 int status;
6425
6426 status = decode_compound_hdr(xdr, &hdr);
6427 if (status)
6428 goto out;
6429 status = decode_putfh(xdr);
6430 if (status)
6431 goto out;
6432 status = decode_open_confirm(xdr, res);
6433 out:
6434 return status;
6435 }
6436
6437 /*
6438 * Decode OPEN response
6439 */
6440 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6441 struct xdr_stream *xdr,
6442 struct nfs_openres *res)
6443 {
6444 struct compound_hdr hdr;
6445 int status;
6446
6447 status = decode_compound_hdr(xdr, &hdr);
6448 if (status)
6449 goto out;
6450 status = decode_sequence(xdr, &res->seq_res, rqstp);
6451 if (status)
6452 goto out;
6453 status = decode_putfh(xdr);
6454 if (status)
6455 goto out;
6456 status = decode_open(xdr, res);
6457 if (status)
6458 goto out;
6459 if (res->access_request)
6460 decode_access(xdr, &res->access_supported, &res->access_result);
6461 decode_getfattr(xdr, res->f_attr, res->server);
6462 out:
6463 return status;
6464 }
6465
6466 /*
6467 * Decode SETATTR response
6468 */
6469 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6470 struct xdr_stream *xdr,
6471 struct nfs_setattrres *res)
6472 {
6473 struct compound_hdr hdr;
6474 int status;
6475
6476 status = decode_compound_hdr(xdr, &hdr);
6477 if (status)
6478 goto out;
6479 status = decode_sequence(xdr, &res->seq_res, rqstp);
6480 if (status)
6481 goto out;
6482 status = decode_putfh(xdr);
6483 if (status)
6484 goto out;
6485 status = decode_setattr(xdr);
6486 if (status)
6487 goto out;
6488 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6489 out:
6490 return status;
6491 }
6492
6493 /*
6494 * Decode LOCK response
6495 */
6496 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6497 struct nfs_lock_res *res)
6498 {
6499 struct compound_hdr hdr;
6500 int status;
6501
6502 status = decode_compound_hdr(xdr, &hdr);
6503 if (status)
6504 goto out;
6505 status = decode_sequence(xdr, &res->seq_res, rqstp);
6506 if (status)
6507 goto out;
6508 status = decode_putfh(xdr);
6509 if (status)
6510 goto out;
6511 status = decode_lock(xdr, res);
6512 out:
6513 return status;
6514 }
6515
6516 /*
6517 * Decode LOCKT response
6518 */
6519 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6520 struct nfs_lockt_res *res)
6521 {
6522 struct compound_hdr hdr;
6523 int status;
6524
6525 status = decode_compound_hdr(xdr, &hdr);
6526 if (status)
6527 goto out;
6528 status = decode_sequence(xdr, &res->seq_res, rqstp);
6529 if (status)
6530 goto out;
6531 status = decode_putfh(xdr);
6532 if (status)
6533 goto out;
6534 status = decode_lockt(xdr, res);
6535 out:
6536 return status;
6537 }
6538
6539 /*
6540 * Decode LOCKU response
6541 */
6542 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6543 struct nfs_locku_res *res)
6544 {
6545 struct compound_hdr hdr;
6546 int status;
6547
6548 status = decode_compound_hdr(xdr, &hdr);
6549 if (status)
6550 goto out;
6551 status = decode_sequence(xdr, &res->seq_res, rqstp);
6552 if (status)
6553 goto out;
6554 status = decode_putfh(xdr);
6555 if (status)
6556 goto out;
6557 status = decode_locku(xdr, res);
6558 out:
6559 return status;
6560 }
6561
6562 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6563 struct xdr_stream *xdr, void *dummy)
6564 {
6565 struct compound_hdr hdr;
6566 int status;
6567
6568 status = decode_compound_hdr(xdr, &hdr);
6569 if (!status)
6570 status = decode_release_lockowner(xdr);
6571 return status;
6572 }
6573
6574 /*
6575 * Decode READLINK response
6576 */
6577 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6578 struct xdr_stream *xdr,
6579 struct nfs4_readlink_res *res)
6580 {
6581 struct compound_hdr hdr;
6582 int status;
6583
6584 status = decode_compound_hdr(xdr, &hdr);
6585 if (status)
6586 goto out;
6587 status = decode_sequence(xdr, &res->seq_res, rqstp);
6588 if (status)
6589 goto out;
6590 status = decode_putfh(xdr);
6591 if (status)
6592 goto out;
6593 status = decode_readlink(xdr, rqstp);
6594 out:
6595 return status;
6596 }
6597
6598 /*
6599 * Decode READDIR response
6600 */
6601 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602 struct nfs4_readdir_res *res)
6603 {
6604 struct compound_hdr hdr;
6605 int status;
6606
6607 status = decode_compound_hdr(xdr, &hdr);
6608 if (status)
6609 goto out;
6610 status = decode_sequence(xdr, &res->seq_res, rqstp);
6611 if (status)
6612 goto out;
6613 status = decode_putfh(xdr);
6614 if (status)
6615 goto out;
6616 status = decode_readdir(xdr, rqstp, res);
6617 out:
6618 return status;
6619 }
6620
6621 /*
6622 * Decode Read response
6623 */
6624 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6625 struct nfs_readres *res)
6626 {
6627 struct compound_hdr hdr;
6628 int status;
6629
6630 status = decode_compound_hdr(xdr, &hdr);
6631 if (status)
6632 goto out;
6633 status = decode_sequence(xdr, &res->seq_res, rqstp);
6634 if (status)
6635 goto out;
6636 status = decode_putfh(xdr);
6637 if (status)
6638 goto out;
6639 status = decode_read(xdr, rqstp, res);
6640 if (!status)
6641 status = res->count;
6642 out:
6643 return status;
6644 }
6645
6646 /*
6647 * Decode WRITE response
6648 */
6649 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6650 struct nfs_writeres *res)
6651 {
6652 struct compound_hdr hdr;
6653 int status;
6654
6655 status = decode_compound_hdr(xdr, &hdr);
6656 if (status)
6657 goto out;
6658 status = decode_sequence(xdr, &res->seq_res, rqstp);
6659 if (status)
6660 goto out;
6661 status = decode_putfh(xdr);
6662 if (status)
6663 goto out;
6664 status = decode_write(xdr, res);
6665 if (status)
6666 goto out;
6667 if (res->fattr)
6668 decode_getfattr(xdr, res->fattr, res->server);
6669 if (!status)
6670 status = res->count;
6671 out:
6672 return status;
6673 }
6674
6675 /*
6676 * Decode COMMIT response
6677 */
6678 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6679 struct nfs_commitres *res)
6680 {
6681 struct compound_hdr hdr;
6682 int status;
6683
6684 status = decode_compound_hdr(xdr, &hdr);
6685 if (status)
6686 goto out;
6687 status = decode_sequence(xdr, &res->seq_res, rqstp);
6688 if (status)
6689 goto out;
6690 status = decode_putfh(xdr);
6691 if (status)
6692 goto out;
6693 status = decode_commit(xdr, res);
6694 out:
6695 return status;
6696 }
6697
6698 /*
6699 * Decode FSINFO response
6700 */
6701 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6702 struct nfs4_fsinfo_res *res)
6703 {
6704 struct compound_hdr hdr;
6705 int status;
6706
6707 status = decode_compound_hdr(xdr, &hdr);
6708 if (!status)
6709 status = decode_sequence(xdr, &res->seq_res, req);
6710 if (!status)
6711 status = decode_putfh(xdr);
6712 if (!status)
6713 status = decode_fsinfo(xdr, res->fsinfo);
6714 return status;
6715 }
6716
6717 /*
6718 * Decode PATHCONF response
6719 */
6720 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6721 struct nfs4_pathconf_res *res)
6722 {
6723 struct compound_hdr hdr;
6724 int status;
6725
6726 status = decode_compound_hdr(xdr, &hdr);
6727 if (!status)
6728 status = decode_sequence(xdr, &res->seq_res, req);
6729 if (!status)
6730 status = decode_putfh(xdr);
6731 if (!status)
6732 status = decode_pathconf(xdr, res->pathconf);
6733 return status;
6734 }
6735
6736 /*
6737 * Decode STATFS response
6738 */
6739 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6740 struct nfs4_statfs_res *res)
6741 {
6742 struct compound_hdr hdr;
6743 int status;
6744
6745 status = decode_compound_hdr(xdr, &hdr);
6746 if (!status)
6747 status = decode_sequence(xdr, &res->seq_res, req);
6748 if (!status)
6749 status = decode_putfh(xdr);
6750 if (!status)
6751 status = decode_statfs(xdr, res->fsstat);
6752 return status;
6753 }
6754
6755 /*
6756 * Decode GETATTR_BITMAP response
6757 */
6758 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6759 struct xdr_stream *xdr,
6760 struct nfs4_server_caps_res *res)
6761 {
6762 struct compound_hdr hdr;
6763 int status;
6764
6765 status = decode_compound_hdr(xdr, &hdr);
6766 if (status)
6767 goto out;
6768 status = decode_sequence(xdr, &res->seq_res, req);
6769 if (status)
6770 goto out;
6771 status = decode_putfh(xdr);
6772 if (status)
6773 goto out;
6774 status = decode_server_caps(xdr, res);
6775 out:
6776 return status;
6777 }
6778
6779 /*
6780 * Decode RENEW response
6781 */
6782 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6783 void *__unused)
6784 {
6785 struct compound_hdr hdr;
6786 int status;
6787
6788 status = decode_compound_hdr(xdr, &hdr);
6789 if (!status)
6790 status = decode_renew(xdr);
6791 return status;
6792 }
6793
6794 /*
6795 * Decode SETCLIENTID response
6796 */
6797 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6798 struct xdr_stream *xdr,
6799 struct nfs4_setclientid_res *res)
6800 {
6801 struct compound_hdr hdr;
6802 int status;
6803
6804 status = decode_compound_hdr(xdr, &hdr);
6805 if (!status)
6806 status = decode_setclientid(xdr, res);
6807 return status;
6808 }
6809
6810 /*
6811 * Decode SETCLIENTID_CONFIRM response
6812 */
6813 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6814 struct xdr_stream *xdr)
6815 {
6816 struct compound_hdr hdr;
6817 int status;
6818
6819 status = decode_compound_hdr(xdr, &hdr);
6820 if (!status)
6821 status = decode_setclientid_confirm(xdr);
6822 return status;
6823 }
6824
6825 /*
6826 * Decode DELEGRETURN response
6827 */
6828 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6829 struct xdr_stream *xdr,
6830 struct nfs4_delegreturnres *res)
6831 {
6832 struct compound_hdr hdr;
6833 int status;
6834
6835 status = decode_compound_hdr(xdr, &hdr);
6836 if (status)
6837 goto out;
6838 status = decode_sequence(xdr, &res->seq_res, rqstp);
6839 if (status)
6840 goto out;
6841 status = decode_putfh(xdr);
6842 if (status != 0)
6843 goto out;
6844 status = decode_getfattr(xdr, res->fattr, res->server);
6845 if (status != 0)
6846 goto out;
6847 status = decode_delegreturn(xdr);
6848 out:
6849 return status;
6850 }
6851
6852 /*
6853 * Decode FS_LOCATIONS response
6854 */
6855 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6856 struct xdr_stream *xdr,
6857 struct nfs4_fs_locations_res *res)
6858 {
6859 struct compound_hdr hdr;
6860 int status;
6861
6862 status = decode_compound_hdr(xdr, &hdr);
6863 if (status)
6864 goto out;
6865 status = decode_sequence(xdr, &res->seq_res, req);
6866 if (status)
6867 goto out;
6868 status = decode_putfh(xdr);
6869 if (status)
6870 goto out;
6871 if (res->migration) {
6872 xdr_enter_page(xdr, PAGE_SIZE);
6873 status = decode_getfattr_generic(xdr,
6874 &res->fs_locations->fattr,
6875 NULL, res->fs_locations,
6876 NULL, res->fs_locations->server);
6877 if (status)
6878 goto out;
6879 if (res->renew)
6880 status = decode_renew(xdr);
6881 } else {
6882 status = decode_lookup(xdr);
6883 if (status)
6884 goto out;
6885 xdr_enter_page(xdr, PAGE_SIZE);
6886 status = decode_getfattr_generic(xdr,
6887 &res->fs_locations->fattr,
6888 NULL, res->fs_locations,
6889 NULL, res->fs_locations->server);
6890 }
6891 out:
6892 return status;
6893 }
6894
6895 /*
6896 * Decode SECINFO response
6897 */
6898 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6899 struct xdr_stream *xdr,
6900 struct nfs4_secinfo_res *res)
6901 {
6902 struct compound_hdr hdr;
6903 int status;
6904
6905 status = decode_compound_hdr(xdr, &hdr);
6906 if (status)
6907 goto out;
6908 status = decode_sequence(xdr, &res->seq_res, rqstp);
6909 if (status)
6910 goto out;
6911 status = decode_putfh(xdr);
6912 if (status)
6913 goto out;
6914 status = decode_secinfo(xdr, res);
6915 out:
6916 return status;
6917 }
6918
6919 /*
6920 * Decode FSID_PRESENT response
6921 */
6922 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6923 struct xdr_stream *xdr,
6924 struct nfs4_fsid_present_res *res)
6925 {
6926 struct compound_hdr hdr;
6927 int status;
6928
6929 status = decode_compound_hdr(xdr, &hdr);
6930 if (status)
6931 goto out;
6932 status = decode_sequence(xdr, &res->seq_res, rqstp);
6933 if (status)
6934 goto out;
6935 status = decode_putfh(xdr);
6936 if (status)
6937 goto out;
6938 status = decode_getfh(xdr, res->fh);
6939 if (status)
6940 goto out;
6941 if (res->renew)
6942 status = decode_renew(xdr);
6943 out:
6944 return status;
6945 }
6946
6947 #if defined(CONFIG_NFS_V4_1)
6948 /*
6949 * Decode BIND_CONN_TO_SESSION response
6950 */
6951 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6952 struct xdr_stream *xdr,
6953 void *res)
6954 {
6955 struct compound_hdr hdr;
6956 int status;
6957
6958 status = decode_compound_hdr(xdr, &hdr);
6959 if (!status)
6960 status = decode_bind_conn_to_session(xdr, res);
6961 return status;
6962 }
6963
6964 /*
6965 * Decode EXCHANGE_ID response
6966 */
6967 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6968 struct xdr_stream *xdr,
6969 void *res)
6970 {
6971 struct compound_hdr hdr;
6972 int status;
6973
6974 status = decode_compound_hdr(xdr, &hdr);
6975 if (!status)
6976 status = decode_exchange_id(xdr, res);
6977 return status;
6978 }
6979
6980 /*
6981 * Decode CREATE_SESSION response
6982 */
6983 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6984 struct xdr_stream *xdr,
6985 struct nfs41_create_session_res *res)
6986 {
6987 struct compound_hdr hdr;
6988 int status;
6989
6990 status = decode_compound_hdr(xdr, &hdr);
6991 if (!status)
6992 status = decode_create_session(xdr, res);
6993 return status;
6994 }
6995
6996 /*
6997 * Decode DESTROY_SESSION response
6998 */
6999 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7000 struct xdr_stream *xdr,
7001 void *res)
7002 {
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (!status)
7008 status = decode_destroy_session(xdr, res);
7009 return status;
7010 }
7011
7012 /*
7013 * Decode DESTROY_CLIENTID response
7014 */
7015 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7016 struct xdr_stream *xdr,
7017 void *res)
7018 {
7019 struct compound_hdr hdr;
7020 int status;
7021
7022 status = decode_compound_hdr(xdr, &hdr);
7023 if (!status)
7024 status = decode_destroy_clientid(xdr, res);
7025 return status;
7026 }
7027
7028 /*
7029 * Decode SEQUENCE response
7030 */
7031 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7032 struct xdr_stream *xdr,
7033 struct nfs4_sequence_res *res)
7034 {
7035 struct compound_hdr hdr;
7036 int status;
7037
7038 status = decode_compound_hdr(xdr, &hdr);
7039 if (!status)
7040 status = decode_sequence(xdr, res, rqstp);
7041 return status;
7042 }
7043
7044 /*
7045 * Decode GET_LEASE_TIME response
7046 */
7047 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7048 struct xdr_stream *xdr,
7049 struct nfs4_get_lease_time_res *res)
7050 {
7051 struct compound_hdr hdr;
7052 int status;
7053
7054 status = decode_compound_hdr(xdr, &hdr);
7055 if (!status)
7056 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7057 if (!status)
7058 status = decode_putrootfh(xdr);
7059 if (!status)
7060 status = decode_fsinfo(xdr, res->lr_fsinfo);
7061 return status;
7062 }
7063
7064 /*
7065 * Decode RECLAIM_COMPLETE response
7066 */
7067 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7068 struct xdr_stream *xdr,
7069 struct nfs41_reclaim_complete_res *res)
7070 {
7071 struct compound_hdr hdr;
7072 int status;
7073
7074 status = decode_compound_hdr(xdr, &hdr);
7075 if (!status)
7076 status = decode_sequence(xdr, &res->seq_res, rqstp);
7077 if (!status)
7078 status = decode_reclaim_complete(xdr, (void *)NULL);
7079 return status;
7080 }
7081
7082 /*
7083 * Decode GETDEVICELIST response
7084 */
7085 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7086 struct xdr_stream *xdr,
7087 struct nfs4_getdevicelist_res *res)
7088 {
7089 struct compound_hdr hdr;
7090 int status;
7091
7092 dprintk("encoding getdevicelist!\n");
7093
7094 status = decode_compound_hdr(xdr, &hdr);
7095 if (status != 0)
7096 goto out;
7097 status = decode_sequence(xdr, &res->seq_res, rqstp);
7098 if (status != 0)
7099 goto out;
7100 status = decode_putfh(xdr);
7101 if (status != 0)
7102 goto out;
7103 status = decode_getdevicelist(xdr, res->devlist);
7104 out:
7105 return status;
7106 }
7107
7108 /*
7109 * Decode GETDEVINFO response
7110 */
7111 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7112 struct xdr_stream *xdr,
7113 struct nfs4_getdeviceinfo_res *res)
7114 {
7115 struct compound_hdr hdr;
7116 int status;
7117
7118 status = decode_compound_hdr(xdr, &hdr);
7119 if (status != 0)
7120 goto out;
7121 status = decode_sequence(xdr, &res->seq_res, rqstp);
7122 if (status != 0)
7123 goto out;
7124 status = decode_getdeviceinfo(xdr, res->pdev);
7125 out:
7126 return status;
7127 }
7128
7129 /*
7130 * Decode LAYOUTGET response
7131 */
7132 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7133 struct xdr_stream *xdr,
7134 struct nfs4_layoutget_res *res)
7135 {
7136 struct compound_hdr hdr;
7137 int status;
7138
7139 status = decode_compound_hdr(xdr, &hdr);
7140 if (status)
7141 goto out;
7142 status = decode_sequence(xdr, &res->seq_res, rqstp);
7143 if (status)
7144 goto out;
7145 status = decode_putfh(xdr);
7146 if (status)
7147 goto out;
7148 status = decode_layoutget(xdr, rqstp, res);
7149 out:
7150 return status;
7151 }
7152
7153 /*
7154 * Decode LAYOUTRETURN response
7155 */
7156 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7157 struct xdr_stream *xdr,
7158 struct nfs4_layoutreturn_res *res)
7159 {
7160 struct compound_hdr hdr;
7161 int status;
7162
7163 status = decode_compound_hdr(xdr, &hdr);
7164 if (status)
7165 goto out;
7166 status = decode_sequence(xdr, &res->seq_res, rqstp);
7167 if (status)
7168 goto out;
7169 status = decode_putfh(xdr);
7170 if (status)
7171 goto out;
7172 status = decode_layoutreturn(xdr, res);
7173 out:
7174 return status;
7175 }
7176
7177 /*
7178 * Decode LAYOUTCOMMIT response
7179 */
7180 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7181 struct xdr_stream *xdr,
7182 struct nfs4_layoutcommit_res *res)
7183 {
7184 struct compound_hdr hdr;
7185 int status;
7186
7187 status = decode_compound_hdr(xdr, &hdr);
7188 if (status)
7189 goto out;
7190 status = decode_sequence(xdr, &res->seq_res, rqstp);
7191 if (status)
7192 goto out;
7193 status = decode_putfh(xdr);
7194 if (status)
7195 goto out;
7196 status = decode_layoutcommit(xdr, rqstp, res);
7197 if (status)
7198 goto out;
7199 decode_getfattr(xdr, res->fattr, res->server);
7200 out:
7201 return status;
7202 }
7203
7204 /*
7205 * Decode SECINFO_NO_NAME response
7206 */
7207 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7208 struct xdr_stream *xdr,
7209 struct nfs4_secinfo_res *res)
7210 {
7211 struct compound_hdr hdr;
7212 int status;
7213
7214 status = decode_compound_hdr(xdr, &hdr);
7215 if (status)
7216 goto out;
7217 status = decode_sequence(xdr, &res->seq_res, rqstp);
7218 if (status)
7219 goto out;
7220 status = decode_putrootfh(xdr);
7221 if (status)
7222 goto out;
7223 status = decode_secinfo_no_name(xdr, res);
7224 out:
7225 return status;
7226 }
7227
7228 /*
7229 * Decode TEST_STATEID response
7230 */
7231 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7232 struct xdr_stream *xdr,
7233 struct nfs41_test_stateid_res *res)
7234 {
7235 struct compound_hdr hdr;
7236 int status;
7237
7238 status = decode_compound_hdr(xdr, &hdr);
7239 if (status)
7240 goto out;
7241 status = decode_sequence(xdr, &res->seq_res, rqstp);
7242 if (status)
7243 goto out;
7244 status = decode_test_stateid(xdr, res);
7245 out:
7246 return status;
7247 }
7248
7249 /*
7250 * Decode FREE_STATEID response
7251 */
7252 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7253 struct xdr_stream *xdr,
7254 struct nfs41_free_stateid_res *res)
7255 {
7256 struct compound_hdr hdr;
7257 int status;
7258
7259 status = decode_compound_hdr(xdr, &hdr);
7260 if (status)
7261 goto out;
7262 status = decode_sequence(xdr, &res->seq_res, rqstp);
7263 if (status)
7264 goto out;
7265 status = decode_free_stateid(xdr, res);
7266 out:
7267 return status;
7268 }
7269 #endif /* CONFIG_NFS_V4_1 */
7270
7271 /**
7272 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7273 * the local page cache.
7274 * @xdr: XDR stream where entry resides
7275 * @entry: buffer to fill in with entry data
7276 * @plus: boolean indicating whether this should be a readdirplus entry
7277 *
7278 * Returns zero if successful, otherwise a negative errno value is
7279 * returned.
7280 *
7281 * This function is not invoked during READDIR reply decoding, but
7282 * rather whenever an application invokes the getdents(2) system call
7283 * on a directory already in our cache.
7284 */
7285 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7286 int plus)
7287 {
7288 unsigned int savep;
7289 uint32_t bitmap[3] = {0};
7290 uint32_t len;
7291 __be32 *p = xdr_inline_decode(xdr, 4);
7292 if (unlikely(!p))
7293 goto out_overflow;
7294 if (*p == xdr_zero) {
7295 p = xdr_inline_decode(xdr, 4);
7296 if (unlikely(!p))
7297 goto out_overflow;
7298 if (*p == xdr_zero)
7299 return -EAGAIN;
7300 entry->eof = 1;
7301 return -EBADCOOKIE;
7302 }
7303
7304 p = xdr_inline_decode(xdr, 12);
7305 if (unlikely(!p))
7306 goto out_overflow;
7307 entry->prev_cookie = entry->cookie;
7308 p = xdr_decode_hyper(p, &entry->cookie);
7309 entry->len = be32_to_cpup(p);
7310
7311 p = xdr_inline_decode(xdr, entry->len);
7312 if (unlikely(!p))
7313 goto out_overflow;
7314 entry->name = (const char *) p;
7315
7316 /*
7317 * In case the server doesn't return an inode number,
7318 * we fake one here. (We don't use inode number 0,
7319 * since glibc seems to choke on it...)
7320 */
7321 entry->ino = 1;
7322 entry->fattr->valid = 0;
7323
7324 if (decode_attr_bitmap(xdr, bitmap) < 0)
7325 goto out_overflow;
7326
7327 if (decode_attr_length(xdr, &len, &savep) < 0)
7328 goto out_overflow;
7329
7330 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7331 NULL, entry->label, entry->server) < 0)
7332 goto out_overflow;
7333 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7334 entry->ino = entry->fattr->mounted_on_fileid;
7335 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7336 entry->ino = entry->fattr->fileid;
7337
7338 entry->d_type = DT_UNKNOWN;
7339 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7340 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7341
7342 return 0;
7343
7344 out_overflow:
7345 print_overflow_msg(__func__, xdr);
7346 return -EAGAIN;
7347 }
7348
7349 /*
7350 * We need to translate between nfs status return values and
7351 * the local errno values which may not be the same.
7352 */
7353 static struct {
7354 int stat;
7355 int errno;
7356 } nfs_errtbl[] = {
7357 { NFS4_OK, 0 },
7358 { NFS4ERR_PERM, -EPERM },
7359 { NFS4ERR_NOENT, -ENOENT },
7360 { NFS4ERR_IO, -errno_NFSERR_IO},
7361 { NFS4ERR_NXIO, -ENXIO },
7362 { NFS4ERR_ACCESS, -EACCES },
7363 { NFS4ERR_EXIST, -EEXIST },
7364 { NFS4ERR_XDEV, -EXDEV },
7365 { NFS4ERR_NOTDIR, -ENOTDIR },
7366 { NFS4ERR_ISDIR, -EISDIR },
7367 { NFS4ERR_INVAL, -EINVAL },
7368 { NFS4ERR_FBIG, -EFBIG },
7369 { NFS4ERR_NOSPC, -ENOSPC },
7370 { NFS4ERR_ROFS, -EROFS },
7371 { NFS4ERR_MLINK, -EMLINK },
7372 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7373 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7374 { NFS4ERR_DQUOT, -EDQUOT },
7375 { NFS4ERR_STALE, -ESTALE },
7376 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7377 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7378 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7379 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7380 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7381 { NFS4ERR_BADTYPE, -EBADTYPE },
7382 { NFS4ERR_LOCKED, -EAGAIN },
7383 { NFS4ERR_SYMLINK, -ELOOP },
7384 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7385 { NFS4ERR_DEADLOCK, -EDEADLK },
7386 { -1, -EIO }
7387 };
7388
7389 /*
7390 * Convert an NFS error code to a local one.
7391 * This one is used jointly by NFSv2 and NFSv3.
7392 */
7393 static int
7394 nfs4_stat_to_errno(int stat)
7395 {
7396 int i;
7397 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7398 if (nfs_errtbl[i].stat == stat)
7399 return nfs_errtbl[i].errno;
7400 }
7401 if (stat <= 10000 || stat > 10100) {
7402 /* The server is looney tunes. */
7403 return -EREMOTEIO;
7404 }
7405 /* If we cannot translate the error, the recovery routines should
7406 * handle it.
7407 * Note: remaining NFSv4 error codes have values > 10000, so should
7408 * not conflict with native Linux error codes.
7409 */
7410 return -stat;
7411 }
7412
7413 #define PROC(proc, argtype, restype) \
7414 [NFSPROC4_CLNT_##proc] = { \
7415 .p_proc = NFSPROC4_COMPOUND, \
7416 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7417 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7418 .p_arglen = NFS4_##argtype##_sz, \
7419 .p_replen = NFS4_##restype##_sz, \
7420 .p_statidx = NFSPROC4_CLNT_##proc, \
7421 .p_name = #proc, \
7422 }
7423
7424 struct rpc_procinfo nfs4_procedures[] = {
7425 PROC(READ, enc_read, dec_read),
7426 PROC(WRITE, enc_write, dec_write),
7427 PROC(COMMIT, enc_commit, dec_commit),
7428 PROC(OPEN, enc_open, dec_open),
7429 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7430 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7431 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7432 PROC(CLOSE, enc_close, dec_close),
7433 PROC(SETATTR, enc_setattr, dec_setattr),
7434 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7435 PROC(RENEW, enc_renew, dec_renew),
7436 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7437 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7438 PROC(LOCK, enc_lock, dec_lock),
7439 PROC(LOCKT, enc_lockt, dec_lockt),
7440 PROC(LOCKU, enc_locku, dec_locku),
7441 PROC(ACCESS, enc_access, dec_access),
7442 PROC(GETATTR, enc_getattr, dec_getattr),
7443 PROC(LOOKUP, enc_lookup, dec_lookup),
7444 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7445 PROC(REMOVE, enc_remove, dec_remove),
7446 PROC(RENAME, enc_rename, dec_rename),
7447 PROC(LINK, enc_link, dec_link),
7448 PROC(SYMLINK, enc_symlink, dec_symlink),
7449 PROC(CREATE, enc_create, dec_create),
7450 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7451 PROC(STATFS, enc_statfs, dec_statfs),
7452 PROC(READLINK, enc_readlink, dec_readlink),
7453 PROC(READDIR, enc_readdir, dec_readdir),
7454 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7455 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7456 PROC(GETACL, enc_getacl, dec_getacl),
7457 PROC(SETACL, enc_setacl, dec_setacl),
7458 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7459 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7460 PROC(SECINFO, enc_secinfo, dec_secinfo),
7461 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7462 #if defined(CONFIG_NFS_V4_1)
7463 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7464 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7465 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7466 PROC(SEQUENCE, enc_sequence, dec_sequence),
7467 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7468 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7469 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7470 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7471 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7472 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7473 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7474 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7475 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7476 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7477 PROC(BIND_CONN_TO_SESSION,
7478 enc_bind_conn_to_session, dec_bind_conn_to_session),
7479 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7480 #endif /* CONFIG_NFS_V4_1 */
7481 };
7482
7483 const struct rpc_version nfs_version4 = {
7484 .number = 4,
7485 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7486 .procs = nfs4_procedures
7487 };
7488
7489 /*
7490 * Local variables:
7491 * c-basic-offset: 8
7492 * End:
7493 */
Linux kernel - Deliverables
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