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bcm2835-v4l2: Fix buffer overflow problem
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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/fs_struct.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4idmap.h"
60 #include "nfs4session.h"
61 #include "pnfs.h"
62 #include "netns.h"
63
64 #define NFSDBG_FACILITY NFSDBG_XDR
65
66 /* Mapping from NFS error code to "errno" error code. */
67 #define errno_NFSERR_IO EIO
68
69 static int nfs4_stat_to_errno(int);
70
71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
72 #ifdef DEBUG
73 #define NFS4_MAXTAGLEN 20
74 #else
75 #define NFS4_MAXTAGLEN 0
76 #endif
77
78 /* lock,open owner id:
79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
80 */
81 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
82 #define lock_owner_id_maxsz (1 + 1 + 4)
83 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
84 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
86 #define op_encode_hdr_maxsz (1)
87 #define op_decode_hdr_maxsz (2)
88 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
90 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
92 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
93 (NFS4_FHSIZE >> 2))
94 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
95 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
96 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
97 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
98 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
99 ((3+NFS4_FHSIZE) >> 2))
100 #define nfs4_fattr_bitmap_maxsz 4
101 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
102 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109 #else
110 #define nfs4_label_maxsz 0
111 #endif
112 /* We support only one layout type per file system */
113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114 /* This is based on getfattr, which uses the most attributes: */
115 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116 3 + 3 + 3 + nfs4_owner_maxsz + \
117 nfs4_group_maxsz + nfs4_label_maxsz + \
118 decode_mdsthreshold_maxsz))
119 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
120 nfs4_fattr_value_maxsz)
121 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
122 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
123 1 + 2 + 1 + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + \
126 nfs4_label_maxsz + \
127 4 + 4)
128 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
129 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
130 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
131 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
132 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
134 * layout types will be returned.
135 */
136 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
137 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
138 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
139 #define decode_renew_maxsz (op_decode_hdr_maxsz)
140 #define encode_setclientid_maxsz \
141 (op_encode_hdr_maxsz + \
142 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
143 /* client name */ \
144 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
145 1 /* sc_prog */ + \
146 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
147 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
148 1) /* sc_cb_ident */
149 #define decode_setclientid_maxsz \
150 (op_decode_hdr_maxsz + \
151 2 /* clientid */ + \
152 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
154 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
155 #define encode_setclientid_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 3 + (NFS4_VERIFIER_SIZE >> 2))
158 #define decode_setclientid_confirm_maxsz \
159 (op_decode_hdr_maxsz)
160 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
161 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
162 #define encode_share_access_maxsz \
163 (2)
164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
165 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
167 #define encode_open_maxsz (op_encode_hdr_maxsz + \
168 2 + encode_share_access_maxsz + 2 + \
169 open_owner_id_maxsz + \
170 encode_opentype_maxsz + \
171 encode_claim_null_maxsz)
172 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
174 decode_ace_maxsz)
175 #define decode_change_info_maxsz (5)
176 #define decode_open_maxsz (op_decode_hdr_maxsz + \
177 decode_stateid_maxsz + \
178 decode_change_info_maxsz + 1 + \
179 nfs4_fattr_bitmap_maxsz + \
180 decode_delegation_maxsz)
181 #define encode_open_confirm_maxsz \
182 (op_encode_hdr_maxsz + \
183 encode_stateid_maxsz + 1)
184 #define decode_open_confirm_maxsz \
185 (op_decode_hdr_maxsz + \
186 decode_stateid_maxsz)
187 #define encode_open_downgrade_maxsz \
188 (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 1 + \
190 encode_share_access_maxsz)
191 #define decode_open_downgrade_maxsz \
192 (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_close_maxsz (op_encode_hdr_maxsz + \
195 1 + encode_stateid_maxsz)
196 #define decode_close_maxsz (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
199 encode_stateid_maxsz + \
200 encode_attrs_maxsz)
201 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
202 nfs4_fattr_bitmap_maxsz)
203 #define encode_read_maxsz (op_encode_hdr_maxsz + \
204 encode_stateid_maxsz + 3)
205 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
206 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
207 2 + encode_verifier_maxsz + 5 + \
208 nfs4_label_maxsz)
209 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
210 decode_verifier_maxsz)
211 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
212 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
213 #define encode_write_maxsz (op_encode_hdr_maxsz + \
214 encode_stateid_maxsz + 4)
215 #define decode_write_maxsz (op_decode_hdr_maxsz + \
216 2 + decode_verifier_maxsz)
217 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
218 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
219 decode_verifier_maxsz)
220 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
221 nfs4_name_maxsz)
222 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
223 decode_change_info_maxsz)
224 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
225 2 * nfs4_name_maxsz)
226 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz + \
228 decode_change_info_maxsz)
229 #define encode_link_maxsz (op_encode_hdr_maxsz + \
230 nfs4_name_maxsz)
231 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
232 #define encode_lockowner_maxsz (7)
233 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
234 7 + \
235 1 + encode_stateid_maxsz + 1 + \
236 encode_lockowner_maxsz)
237 #define decode_lock_denied_maxsz \
238 (8 + decode_lockowner_maxsz)
239 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
240 decode_lock_denied_maxsz)
241 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
242 encode_lockowner_maxsz)
243 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
244 decode_lock_denied_maxsz)
245 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
246 encode_stateid_maxsz + \
247 4)
248 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
249 decode_stateid_maxsz)
250 #define encode_release_lockowner_maxsz \
251 (op_encode_hdr_maxsz + \
252 encode_lockowner_maxsz)
253 #define decode_release_lockowner_maxsz \
254 (op_decode_hdr_maxsz)
255 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
256 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
257 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
258 1 + nfs4_name_maxsz + \
259 1 + \
260 nfs4_fattr_maxsz)
261 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
262 #define encode_create_maxsz (op_encode_hdr_maxsz + \
263 1 + 2 + nfs4_name_maxsz + \
264 encode_attrs_maxsz)
265 #define decode_create_maxsz (op_decode_hdr_maxsz + \
266 decode_change_info_maxsz + \
267 nfs4_fattr_bitmap_maxsz)
268 #define encode_statfs_maxsz (encode_getattr_maxsz)
269 #define decode_statfs_maxsz (decode_getattr_maxsz)
270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
272 #define encode_getacl_maxsz (encode_getattr_maxsz)
273 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
274 nfs4_fattr_bitmap_maxsz + 1)
275 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
276 encode_stateid_maxsz + 3)
277 #define decode_setacl_maxsz (decode_setattr_maxsz)
278 #define encode_fs_locations_maxsz \
279 (encode_getattr_maxsz)
280 #define decode_fs_locations_maxsz \
281 (0)
282 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
283 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
284
285 #if defined(CONFIG_NFS_V4_1)
286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
288 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
289
290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
291 encode_verifier_maxsz + \
292 1 /* co_ownerid.len */ + \
293 /* eia_clientowner */ \
294 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
295 1 /* flags */ + \
296 1 /* spa_how */ + \
297 /* max is SP4_MACH_CRED (for now) */ + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 + NFS4_OP_MAP_NUM_WORDS + \
300 1 /* implementation id array of size 1 */ + \
301 1 /* nii_domain */ + \
302 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303 1 /* nii_name */ + \
304 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
305 3 /* nii_date */)
306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
307 2 /* eir_clientid */ + \
308 1 /* eir_sequenceid */ + \
309 1 /* eir_flags */ + \
310 1 /* spr_how */ + \
311 /* max is SP4_MACH_CRED (for now) */ + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 + NFS4_OP_MAP_NUM_WORDS + \
314 2 /* eir_server_owner.so_minor_id */ + \
315 /* eir_server_owner.so_major_id<> */ \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
317 /* eir_server_scope<> */ \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319 1 /* eir_server_impl_id array length */ + \
320 1 /* nii_domain */ + \
321 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
322 1 /* nii_name */ + \
323 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 3 /* nii_date */)
325 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
326 #define decode_channel_attrs_maxsz (6 + \
327 1 /* ca_rdma_ird.len */ + \
328 1 /* ca_rdma_ird */)
329 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
330 2 /* csa_clientid */ + \
331 1 /* csa_sequence */ + \
332 1 /* csa_flags */ + \
333 encode_channel_attrs_maxsz + \
334 encode_channel_attrs_maxsz + \
335 1 /* csa_cb_program */ + \
336 1 /* csa_sec_parms.len (1) */ + \
337 1 /* cb_secflavor (AUTH_SYS) */ + \
338 1 /* stamp */ + \
339 1 /* machinename.len */ + \
340 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
341 1 /* uid */ + \
342 1 /* gid */ + \
343 1 /* gids.len (0) */)
344 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
345 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
346 1 /* csr_sequence */ + \
347 1 /* csr_flags */ + \
348 decode_channel_attrs_maxsz + \
349 decode_channel_attrs_maxsz)
350 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
351 /* bctsa_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsa_dir */ + \
354 1 /* bctsa_use_conn_in_rdma_mode */)
355 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
356 /* bctsr_sessid */ \
357 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 1 /* bctsr_dir */ + \
359 1 /* bctsr_use_conn_in_rdma_mode */)
360 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
361 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
362 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
363 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
364 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
366 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
367 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
368 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
369 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
372 1 /* layout type */ + \
373 1 /* maxcount */ + \
374 1 /* bitmap size */ + \
375 1 /* notification bitmap length */ + \
376 1 /* notification bitmap, word 0 */)
377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
378 1 /* layout type */ + \
379 1 /* opaque devaddr4 length */ + \
380 /* devaddr4 payload is read into page */ \
381 1 /* notification bitmap length */ + \
382 1 /* notification bitmap, word 0 */)
383 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
384 encode_stateid_maxsz)
385 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
386 decode_stateid_maxsz + \
387 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
389 2 /* offset */ + \
390 2 /* length */ + \
391 1 /* reclaim */ + \
392 encode_stateid_maxsz + \
393 1 /* new offset (true) */ + \
394 2 /* last byte written */ + \
395 1 /* nt_timechanged (false) */ + \
396 1 /* layoutupdate4 layout type */ + \
397 1 /* layoutupdate4 opaqueue len */)
398 /* the actual content of layoutupdate4 should
399 be allocated by drivers and spliced in
400 using xdr_write_pages */
401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
403 encode_stateid_maxsz + \
404 1 + \
405 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
407 1 + decode_stateid_maxsz)
408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
410 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
411 XDR_QUADLEN(NFS4_STATEID_SIZE))
412 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
413 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
414 XDR_QUADLEN(NFS4_STATEID_SIZE))
415 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
416 #else /* CONFIG_NFS_V4_1 */
417 #define encode_sequence_maxsz 0
418 #define decode_sequence_maxsz 0
419 #define encode_layoutreturn_maxsz 0
420 #define decode_layoutreturn_maxsz 0
421 #endif /* CONFIG_NFS_V4_1 */
422
423 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
424 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
425 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_read_maxsz)
429 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_read_maxsz)
433 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_readlink_maxsz)
437 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_readlink_maxsz)
441 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_readdir_maxsz)
445 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_readdir_maxsz)
449 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_write_maxsz + \
453 encode_getattr_maxsz)
454 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
455 decode_sequence_maxsz + \
456 decode_putfh_maxsz + \
457 decode_write_maxsz + \
458 decode_getattr_maxsz)
459 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_commit_maxsz)
463 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_commit_maxsz)
467 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
468 encode_sequence_maxsz + \
469 encode_putfh_maxsz + \
470 encode_open_maxsz + \
471 encode_access_maxsz + \
472 encode_getfh_maxsz + \
473 encode_getattr_maxsz)
474 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
475 decode_sequence_maxsz + \
476 decode_putfh_maxsz + \
477 decode_open_maxsz + \
478 decode_access_maxsz + \
479 decode_getfh_maxsz + \
480 decode_getattr_maxsz)
481 #define NFS4_enc_open_confirm_sz \
482 (compound_encode_hdr_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_confirm_maxsz)
485 #define NFS4_dec_open_confirm_sz \
486 (compound_decode_hdr_maxsz + \
487 decode_putfh_maxsz + \
488 decode_open_confirm_maxsz)
489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_open_maxsz + \
493 encode_access_maxsz + \
494 encode_getattr_maxsz)
495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
496 decode_sequence_maxsz + \
497 decode_putfh_maxsz + \
498 decode_open_maxsz + \
499 decode_access_maxsz + \
500 decode_getattr_maxsz)
501 #define NFS4_enc_open_downgrade_sz \
502 (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_layoutreturn_maxsz + \
506 encode_open_downgrade_maxsz)
507 #define NFS4_dec_open_downgrade_sz \
508 (compound_decode_hdr_maxsz + \
509 decode_sequence_maxsz + \
510 decode_putfh_maxsz + \
511 decode_layoutreturn_maxsz + \
512 decode_open_downgrade_maxsz)
513 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
514 encode_sequence_maxsz + \
515 encode_putfh_maxsz + \
516 encode_layoutreturn_maxsz + \
517 encode_close_maxsz + \
518 encode_getattr_maxsz)
519 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
520 decode_sequence_maxsz + \
521 decode_putfh_maxsz + \
522 decode_layoutreturn_maxsz + \
523 decode_close_maxsz + \
524 decode_getattr_maxsz)
525 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_setattr_maxsz + \
529 encode_getattr_maxsz)
530 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
531 decode_sequence_maxsz + \
532 decode_putfh_maxsz + \
533 decode_setattr_maxsz + \
534 decode_getattr_maxsz)
535 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
536 encode_sequence_maxsz + \
537 encode_putfh_maxsz + \
538 encode_fsinfo_maxsz)
539 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_fsinfo_maxsz)
543 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
544 encode_renew_maxsz)
545 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
546 decode_renew_maxsz)
547 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
548 encode_setclientid_maxsz)
549 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
550 decode_setclientid_maxsz)
551 #define NFS4_enc_setclientid_confirm_sz \
552 (compound_encode_hdr_maxsz + \
553 encode_setclientid_confirm_maxsz)
554 #define NFS4_dec_setclientid_confirm_sz \
555 (compound_decode_hdr_maxsz + \
556 decode_setclientid_confirm_maxsz)
557 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_lock_maxsz)
561 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_lock_maxsz)
565 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_lockt_maxsz)
569 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_lockt_maxsz)
573 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_locku_maxsz)
577 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
578 decode_sequence_maxsz + \
579 decode_putfh_maxsz + \
580 decode_locku_maxsz)
581 #define NFS4_enc_release_lockowner_sz \
582 (compound_encode_hdr_maxsz + \
583 encode_lockowner_maxsz)
584 #define NFS4_dec_release_lockowner_sz \
585 (compound_decode_hdr_maxsz + \
586 decode_lockowner_maxsz)
587 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
588 encode_sequence_maxsz + \
589 encode_putfh_maxsz + \
590 encode_access_maxsz + \
591 encode_getattr_maxsz)
592 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
593 decode_sequence_maxsz + \
594 decode_putfh_maxsz + \
595 decode_access_maxsz + \
596 decode_getattr_maxsz)
597 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
598 encode_sequence_maxsz + \
599 encode_putfh_maxsz + \
600 encode_getattr_maxsz + \
601 encode_renew_maxsz)
602 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
603 decode_sequence_maxsz + \
604 decode_putfh_maxsz + \
605 decode_getattr_maxsz + \
606 decode_renew_maxsz)
607 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_lookup_maxsz + \
611 encode_getattr_maxsz + \
612 encode_getfh_maxsz)
613 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
614 decode_sequence_maxsz + \
615 decode_putfh_maxsz + \
616 decode_lookup_maxsz + \
617 decode_getattr_maxsz + \
618 decode_getfh_maxsz)
619 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
620 encode_sequence_maxsz + \
621 encode_putrootfh_maxsz + \
622 encode_getattr_maxsz + \
623 encode_getfh_maxsz)
624 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putrootfh_maxsz + \
627 decode_getattr_maxsz + \
628 decode_getfh_maxsz)
629 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_remove_maxsz)
633 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_remove_maxsz)
637 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putfh_maxsz + \
640 encode_savefh_maxsz + \
641 encode_putfh_maxsz + \
642 encode_rename_maxsz)
643 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
644 decode_sequence_maxsz + \
645 decode_putfh_maxsz + \
646 decode_savefh_maxsz + \
647 decode_putfh_maxsz + \
648 decode_rename_maxsz)
649 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putfh_maxsz + \
652 encode_savefh_maxsz + \
653 encode_putfh_maxsz + \
654 encode_link_maxsz + \
655 encode_restorefh_maxsz + \
656 encode_getattr_maxsz)
657 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
658 decode_sequence_maxsz + \
659 decode_putfh_maxsz + \
660 decode_savefh_maxsz + \
661 decode_putfh_maxsz + \
662 decode_link_maxsz + \
663 decode_restorefh_maxsz + \
664 decode_getattr_maxsz)
665 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
666 encode_sequence_maxsz + \
667 encode_putfh_maxsz + \
668 encode_symlink_maxsz + \
669 encode_getattr_maxsz + \
670 encode_getfh_maxsz)
671 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
672 decode_sequence_maxsz + \
673 decode_putfh_maxsz + \
674 decode_symlink_maxsz + \
675 decode_getattr_maxsz + \
676 decode_getfh_maxsz)
677 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
678 encode_sequence_maxsz + \
679 encode_putfh_maxsz + \
680 encode_create_maxsz + \
681 encode_getfh_maxsz + \
682 encode_getattr_maxsz)
683 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
684 decode_sequence_maxsz + \
685 decode_putfh_maxsz + \
686 decode_create_maxsz + \
687 decode_getfh_maxsz + \
688 decode_getattr_maxsz)
689 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
690 encode_sequence_maxsz + \
691 encode_putfh_maxsz + \
692 encode_getattr_maxsz)
693 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_putfh_maxsz + \
696 decode_getattr_maxsz)
697 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_statfs_maxsz)
701 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_statfs_maxsz)
705 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_getattr_maxsz)
709 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_getattr_maxsz)
713 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
714 encode_sequence_maxsz + \
715 encode_putfh_maxsz + \
716 encode_layoutreturn_maxsz + \
717 encode_delegreturn_maxsz + \
718 encode_getattr_maxsz)
719 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_putfh_maxsz + \
722 decode_layoutreturn_maxsz + \
723 decode_delegreturn_maxsz + \
724 decode_getattr_maxsz)
725 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_getacl_maxsz)
729 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_getacl_maxsz)
733 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_putfh_maxsz + \
736 encode_setacl_maxsz)
737 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
738 decode_sequence_maxsz + \
739 decode_putfh_maxsz + \
740 decode_setacl_maxsz)
741 #define NFS4_enc_fs_locations_sz \
742 (compound_encode_hdr_maxsz + \
743 encode_sequence_maxsz + \
744 encode_putfh_maxsz + \
745 encode_lookup_maxsz + \
746 encode_fs_locations_maxsz + \
747 encode_renew_maxsz)
748 #define NFS4_dec_fs_locations_sz \
749 (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_lookup_maxsz + \
753 decode_fs_locations_maxsz + \
754 decode_renew_maxsz)
755 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_secinfo_maxsz)
759 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_secinfo_maxsz)
763 #define NFS4_enc_fsid_present_sz \
764 (compound_encode_hdr_maxsz + \
765 encode_sequence_maxsz + \
766 encode_putfh_maxsz + \
767 encode_getfh_maxsz + \
768 encode_renew_maxsz)
769 #define NFS4_dec_fsid_present_sz \
770 (compound_decode_hdr_maxsz + \
771 decode_sequence_maxsz + \
772 decode_putfh_maxsz + \
773 decode_getfh_maxsz + \
774 decode_renew_maxsz)
775 #if defined(CONFIG_NFS_V4_1)
776 #define NFS4_enc_bind_conn_to_session_sz \
777 (compound_encode_hdr_maxsz + \
778 encode_bind_conn_to_session_maxsz)
779 #define NFS4_dec_bind_conn_to_session_sz \
780 (compound_decode_hdr_maxsz + \
781 decode_bind_conn_to_session_maxsz)
782 #define NFS4_enc_exchange_id_sz \
783 (compound_encode_hdr_maxsz + \
784 encode_exchange_id_maxsz)
785 #define NFS4_dec_exchange_id_sz \
786 (compound_decode_hdr_maxsz + \
787 decode_exchange_id_maxsz)
788 #define NFS4_enc_create_session_sz \
789 (compound_encode_hdr_maxsz + \
790 encode_create_session_maxsz)
791 #define NFS4_dec_create_session_sz \
792 (compound_decode_hdr_maxsz + \
793 decode_create_session_maxsz)
794 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
795 encode_destroy_session_maxsz)
796 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
797 decode_destroy_session_maxsz)
798 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
799 encode_destroy_clientid_maxsz)
800 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
801 decode_destroy_clientid_maxsz)
802 #define NFS4_enc_sequence_sz \
803 (compound_decode_hdr_maxsz + \
804 encode_sequence_maxsz)
805 #define NFS4_dec_sequence_sz \
806 (compound_decode_hdr_maxsz + \
807 decode_sequence_maxsz)
808 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
809 encode_sequence_maxsz + \
810 encode_putrootfh_maxsz + \
811 encode_fsinfo_maxsz)
812 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
813 decode_sequence_maxsz + \
814 decode_putrootfh_maxsz + \
815 decode_fsinfo_maxsz)
816 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
817 encode_sequence_maxsz + \
818 encode_reclaim_complete_maxsz)
819 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
820 decode_sequence_maxsz + \
821 decode_reclaim_complete_maxsz)
822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
823 encode_sequence_maxsz +\
824 encode_getdeviceinfo_maxsz)
825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
826 decode_sequence_maxsz + \
827 decode_getdeviceinfo_maxsz)
828 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz + \
830 encode_putfh_maxsz + \
831 encode_layoutget_maxsz)
832 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
833 decode_sequence_maxsz + \
834 decode_putfh_maxsz + \
835 decode_layoutget_maxsz)
836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
837 encode_sequence_maxsz +\
838 encode_putfh_maxsz + \
839 encode_layoutcommit_maxsz + \
840 encode_getattr_maxsz)
841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_putfh_maxsz + \
844 decode_layoutcommit_maxsz + \
845 decode_getattr_maxsz)
846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putfh_maxsz + \
849 encode_layoutreturn_maxsz)
850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putfh_maxsz + \
853 decode_layoutreturn_maxsz)
854 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz + \
856 encode_putrootfh_maxsz +\
857 encode_secinfo_no_name_maxsz)
858 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
859 decode_sequence_maxsz + \
860 decode_putrootfh_maxsz + \
861 decode_secinfo_no_name_maxsz)
862 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_test_stateid_maxsz)
865 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
866 decode_sequence_maxsz + \
867 decode_test_stateid_maxsz)
868 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
869 encode_sequence_maxsz + \
870 encode_free_stateid_maxsz)
871 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
872 decode_sequence_maxsz + \
873 decode_free_stateid_maxsz)
874
875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
876 compound_encode_hdr_maxsz +
877 encode_sequence_maxsz +
878 encode_putfh_maxsz +
879 encode_getattr_maxsz) *
880 XDR_UNIT);
881
882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
883 compound_decode_hdr_maxsz +
884 decode_sequence_maxsz +
885 decode_putfh_maxsz) *
886 XDR_UNIT);
887
888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
889 compound_decode_hdr_maxsz +
890 decode_sequence_maxsz) *
891 XDR_UNIT);
892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
893 #endif /* CONFIG_NFS_V4_1 */
894
895 static const umode_t nfs_type2fmt[] = {
896 [NF4BAD] = 0,
897 [NF4REG] = S_IFREG,
898 [NF4DIR] = S_IFDIR,
899 [NF4BLK] = S_IFBLK,
900 [NF4CHR] = S_IFCHR,
901 [NF4LNK] = S_IFLNK,
902 [NF4SOCK] = S_IFSOCK,
903 [NF4FIFO] = S_IFIFO,
904 [NF4ATTRDIR] = 0,
905 [NF4NAMEDATTR] = 0,
906 };
907
908 struct compound_hdr {
909 int32_t status;
910 uint32_t nops;
911 __be32 * nops_p;
912 uint32_t taglen;
913 char * tag;
914 uint32_t replen; /* expected reply words */
915 u32 minorversion;
916 };
917
918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
919 {
920 __be32 *p = xdr_reserve_space(xdr, nbytes);
921 BUG_ON(!p);
922 return p;
923 }
924
925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
926 {
927 __be32 *p;
928
929 p = xdr_reserve_space(xdr, len);
930 xdr_encode_opaque_fixed(p, buf, len);
931 }
932
933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
934 {
935 __be32 *p;
936
937 p = reserve_space(xdr, 4 + len);
938 xdr_encode_opaque(p, str, len);
939 }
940
941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
942 {
943 __be32 *p;
944
945 p = reserve_space(xdr, 4);
946 *p = cpu_to_be32(n);
947 }
948
949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
950 {
951 __be32 *p;
952
953 p = reserve_space(xdr, 8);
954 xdr_encode_hyper(p, n);
955 }
956
957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
958 const struct nfs_seqid *seqid)
959 {
960 if (seqid != NULL)
961 encode_uint32(xdr, seqid->sequence->counter);
962 else
963 encode_uint32(xdr, 0);
964 }
965
966 static void encode_compound_hdr(struct xdr_stream *xdr,
967 struct rpc_rqst *req,
968 struct compound_hdr *hdr)
969 {
970 __be32 *p;
971 struct rpc_auth *auth = req->rq_cred->cr_auth;
972
973 /* initialize running count of expected bytes in reply.
974 * NOTE: the replied tag SHOULD be the same is the one sent,
975 * but this is not required as a MUST for the server to do so. */
976 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
977
978 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
979 encode_string(xdr, hdr->taglen, hdr->tag);
980 p = reserve_space(xdr, 8);
981 *p++ = cpu_to_be32(hdr->minorversion);
982 hdr->nops_p = p;
983 *p = cpu_to_be32(hdr->nops);
984 }
985
986 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
987 uint32_t replen,
988 struct compound_hdr *hdr)
989 {
990 encode_uint32(xdr, op);
991 hdr->nops++;
992 hdr->replen += replen;
993 }
994
995 static void encode_nops(struct compound_hdr *hdr)
996 {
997 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
998 *hdr->nops_p = htonl(hdr->nops);
999 }
1000
1001 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002 {
1003 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004 }
1005
1006 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007 {
1008 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009 }
1010
1011 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012 const struct nfs4_label *label,
1013 const struct nfs_server *server,
1014 bool excl_check, const umode_t *umask)
1015 {
1016 char owner_name[IDMAP_NAMESZ];
1017 char owner_group[IDMAP_NAMESZ];
1018 int owner_namelen = 0;
1019 int owner_grouplen = 0;
1020 __be32 *p;
1021 unsigned i;
1022 uint32_t len = 0;
1023 uint32_t bmval_len;
1024 uint32_t bmval[3] = { 0 };
1025
1026 /*
1027 * We reserve enough space to write the entire attribute buffer at once.
1028 */
1029 if (iap->ia_valid & ATTR_SIZE) {
1030 bmval[0] |= FATTR4_WORD0_SIZE;
1031 len += 8;
1032 }
1033 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034 umask = NULL;
1035 if (iap->ia_valid & ATTR_MODE) {
1036 if (umask) {
1037 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038 len += 8;
1039 } else {
1040 bmval[1] |= FATTR4_WORD1_MODE;
1041 len += 4;
1042 }
1043 }
1044 if (iap->ia_valid & ATTR_UID) {
1045 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046 if (owner_namelen < 0) {
1047 dprintk("nfs: couldn't resolve uid %d to string\n",
1048 from_kuid(&init_user_ns, iap->ia_uid));
1049 /* XXX */
1050 strcpy(owner_name, "nobody");
1051 owner_namelen = sizeof("nobody") - 1;
1052 /* goto out; */
1053 }
1054 bmval[1] |= FATTR4_WORD1_OWNER;
1055 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056 }
1057 if (iap->ia_valid & ATTR_GID) {
1058 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059 if (owner_grouplen < 0) {
1060 dprintk("nfs: couldn't resolve gid %d to string\n",
1061 from_kgid(&init_user_ns, iap->ia_gid));
1062 strcpy(owner_group, "nobody");
1063 owner_grouplen = sizeof("nobody") - 1;
1064 /* goto out; */
1065 }
1066 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068 }
1069 if (iap->ia_valid & ATTR_ATIME_SET) {
1070 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071 len += 16;
1072 } else if (iap->ia_valid & ATTR_ATIME) {
1073 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074 len += 4;
1075 }
1076 if (iap->ia_valid & ATTR_MTIME_SET) {
1077 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078 len += 16;
1079 } else if (iap->ia_valid & ATTR_MTIME) {
1080 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081 len += 4;
1082 }
1083
1084 if (excl_check) {
1085 const u32 *excl_bmval = server->exclcreat_bitmask;
1086 bmval[0] &= excl_bmval[0];
1087 bmval[1] &= excl_bmval[1];
1088 bmval[2] &= excl_bmval[2];
1089
1090 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091 label = NULL;
1092 }
1093
1094 if (label) {
1095 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097 }
1098
1099 if (bmval[2] != 0)
1100 bmval_len = 3;
1101 else if (bmval[1] != 0)
1102 bmval_len = 2;
1103 else
1104 bmval_len = 1;
1105
1106 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108 *p++ = cpu_to_be32(bmval_len);
1109 for (i = 0; i < bmval_len; i++)
1110 *p++ = cpu_to_be32(bmval[i]);
1111 *p++ = cpu_to_be32(len);
1112
1113 if (bmval[0] & FATTR4_WORD0_SIZE)
1114 p = xdr_encode_hyper(p, iap->ia_size);
1115 if (bmval[1] & FATTR4_WORD1_MODE)
1116 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117 if (bmval[1] & FATTR4_WORD1_OWNER)
1118 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122 if (iap->ia_valid & ATTR_ATIME_SET) {
1123 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126 } else
1127 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128 }
1129 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130 if (iap->ia_valid & ATTR_MTIME_SET) {
1131 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134 } else
1135 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136 }
1137 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138 *p++ = cpu_to_be32(label->lfs);
1139 *p++ = cpu_to_be32(label->pi);
1140 *p++ = cpu_to_be32(label->len);
1141 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142 }
1143 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145 *p++ = cpu_to_be32(*umask);
1146 }
1147
1148 /* out: */
1149 }
1150
1151 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152 {
1153 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154 encode_uint32(xdr, access);
1155 }
1156
1157 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158 {
1159 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160 encode_nfs4_seqid(xdr, arg->seqid);
1161 encode_nfs4_stateid(xdr, &arg->stateid);
1162 }
1163
1164 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165 {
1166 __be32 *p;
1167
1168 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169 p = reserve_space(xdr, 12);
1170 p = xdr_encode_hyper(p, args->offset);
1171 *p = cpu_to_be32(args->count);
1172 }
1173
1174 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175 {
1176 __be32 *p;
1177
1178 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179 encode_uint32(xdr, create->ftype);
1180
1181 switch (create->ftype) {
1182 case NF4LNK:
1183 p = reserve_space(xdr, 4);
1184 *p = cpu_to_be32(create->u.symlink.len);
1185 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186 create->u.symlink.len);
1187 xdr->buf->flags |= XDRBUF_WRITE;
1188 break;
1189
1190 case NF4BLK: case NF4CHR:
1191 p = reserve_space(xdr, 8);
1192 *p++ = cpu_to_be32(create->u.device.specdata1);
1193 *p = cpu_to_be32(create->u.device.specdata2);
1194 break;
1195
1196 default:
1197 break;
1198 }
1199
1200 encode_string(xdr, create->name->len, create->name->name);
1201 encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202 &create->umask);
1203 }
1204
1205 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206 {
1207 __be32 *p;
1208
1209 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210 p = reserve_space(xdr, 8);
1211 *p++ = cpu_to_be32(1);
1212 *p = cpu_to_be32(bitmap);
1213 }
1214
1215 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216 {
1217 __be32 *p;
1218
1219 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220 p = reserve_space(xdr, 12);
1221 *p++ = cpu_to_be32(2);
1222 *p++ = cpu_to_be32(bm0);
1223 *p = cpu_to_be32(bm1);
1224 }
1225
1226 static void
1227 encode_getattr_three(struct xdr_stream *xdr,
1228 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229 struct compound_hdr *hdr)
1230 {
1231 __be32 *p;
1232
1233 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234 if (bm2) {
1235 p = reserve_space(xdr, 16);
1236 *p++ = cpu_to_be32(3);
1237 *p++ = cpu_to_be32(bm0);
1238 *p++ = cpu_to_be32(bm1);
1239 *p = cpu_to_be32(bm2);
1240 } else if (bm1) {
1241 p = reserve_space(xdr, 12);
1242 *p++ = cpu_to_be32(2);
1243 *p++ = cpu_to_be32(bm0);
1244 *p = cpu_to_be32(bm1);
1245 } else {
1246 p = reserve_space(xdr, 8);
1247 *p++ = cpu_to_be32(1);
1248 *p = cpu_to_be32(bm0);
1249 }
1250 }
1251
1252 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253 {
1254 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255 bitmask[1] & nfs4_fattr_bitmap[1],
1256 bitmask[2] & nfs4_fattr_bitmap[2],
1257 hdr);
1258 }
1259
1260 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261 const u32 *open_bitmap,
1262 struct compound_hdr *hdr)
1263 {
1264 encode_getattr_three(xdr,
1265 bitmask[0] & open_bitmap[0],
1266 bitmask[1] & open_bitmap[1],
1267 bitmask[2] & open_bitmap[2],
1268 hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273 encode_getattr_three(xdr,
1274 bitmask[0] & nfs4_fsinfo_bitmap[0],
1275 bitmask[1] & nfs4_fsinfo_bitmap[1],
1276 bitmask[2] & nfs4_fsinfo_bitmap[2],
1277 hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294 encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299 if (fl->fl_type == F_RDLCK)
1300 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306 if (fl->fl_end == OFFSET_MAX)
1307 return ~(uint64_t)0;
1308 return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313 __be32 *p;
1314
1315 p = reserve_space(xdr, 32);
1316 p = xdr_encode_hyper(p, lowner->clientid);
1317 *p++ = cpu_to_be32(20);
1318 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319 *p++ = cpu_to_be32(lowner->s_dev);
1320 xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329 __be32 *p;
1330
1331 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332 p = reserve_space(xdr, 28);
1333 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334 *p++ = cpu_to_be32(args->reclaim);
1335 p = xdr_encode_hyper(p, args->fl->fl_start);
1336 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 *p = cpu_to_be32(args->new_lock_owner);
1338 if (args->new_lock_owner){
1339 encode_nfs4_seqid(xdr, args->open_seqid);
1340 encode_nfs4_stateid(xdr, &args->open_stateid);
1341 encode_nfs4_seqid(xdr, args->lock_seqid);
1342 encode_lockowner(xdr, &args->lock_owner);
1343 }
1344 else {
1345 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346 encode_nfs4_seqid(xdr, args->lock_seqid);
1347 }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352 __be32 *p;
1353
1354 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355 p = reserve_space(xdr, 20);
1356 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357 p = xdr_encode_hyper(p, args->fl->fl_start);
1358 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359 encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364 __be32 *p;
1365
1366 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368 encode_nfs4_seqid(xdr, args->seqid);
1369 encode_nfs4_stateid(xdr, &args->stateid);
1370 p = reserve_space(xdr, 16);
1371 p = xdr_encode_hyper(p, args->fl->fl_start);
1372 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378 encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384 encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388 {
1389 __be32 *p;
1390
1391 p = reserve_space(xdr, 8);
1392 *p++ = cpu_to_be32(share_access);
1393 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1394 }
1395
1396 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398 __be32 *p;
1399 /*
1400 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401 * owner 4 = 32
1402 */
1403 encode_nfs4_seqid(xdr, arg->seqid);
1404 encode_share_access(xdr, arg->share_access);
1405 p = reserve_space(xdr, 36);
1406 p = xdr_encode_hyper(p, arg->clientid);
1407 *p++ = cpu_to_be32(24);
1408 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409 *p++ = cpu_to_be32(arg->server->s_dev);
1410 *p++ = cpu_to_be32(arg->id.uniquifier);
1411 xdr_encode_hyper(p, arg->id.create_time);
1412 }
1413
1414 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415 {
1416 __be32 *p;
1417
1418 p = reserve_space(xdr, 4);
1419 switch(arg->createmode) {
1420 case NFS4_CREATE_UNCHECKED:
1421 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423 &arg->umask);
1424 break;
1425 case NFS4_CREATE_GUARDED:
1426 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428 &arg->umask);
1429 break;
1430 case NFS4_CREATE_EXCLUSIVE:
1431 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433 break;
1434 case NFS4_CREATE_EXCLUSIVE4_1:
1435 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438 &arg->umask);
1439 }
1440 }
1441
1442 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443 {
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 switch (arg->open_flags & O_CREAT) {
1448 case 0:
1449 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450 break;
1451 default:
1452 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453 encode_createmode(xdr, arg);
1454 }
1455 }
1456
1457 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458 {
1459 __be32 *p;
1460
1461 p = reserve_space(xdr, 4);
1462 switch (delegation_type) {
1463 case 0:
1464 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465 break;
1466 case FMODE_READ:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468 break;
1469 case FMODE_WRITE|FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471 break;
1472 default:
1473 BUG();
1474 }
1475 }
1476
1477 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478 {
1479 __be32 *p;
1480
1481 p = reserve_space(xdr, 4);
1482 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483 encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492 encode_delegation_type(xdr, type);
1493 }
1494
1495 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496 {
1497 __be32 *p;
1498
1499 p = reserve_space(xdr, 4);
1500 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501 encode_nfs4_stateid(xdr, stateid);
1502 encode_string(xdr, name->len, name->name);
1503 }
1504
1505 static inline void encode_claim_fh(struct xdr_stream *xdr)
1506 {
1507 __be32 *p;
1508
1509 p = reserve_space(xdr, 4);
1510 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511 }
1512
1513 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514 {
1515 __be32 *p;
1516
1517 p = reserve_space(xdr, 4);
1518 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519 encode_nfs4_stateid(xdr, stateid);
1520 }
1521
1522 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523 {
1524 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525 encode_openhdr(xdr, arg);
1526 encode_opentype(xdr, arg);
1527 switch (arg->claim) {
1528 case NFS4_OPEN_CLAIM_NULL:
1529 encode_claim_null(xdr, arg->name);
1530 break;
1531 case NFS4_OPEN_CLAIM_PREVIOUS:
1532 encode_claim_previous(xdr, arg->u.delegation_type);
1533 break;
1534 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536 break;
1537 case NFS4_OPEN_CLAIM_FH:
1538 encode_claim_fh(xdr);
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542 break;
1543 default:
1544 BUG();
1545 }
1546 }
1547
1548 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549 {
1550 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551 encode_nfs4_stateid(xdr, arg->stateid);
1552 encode_nfs4_seqid(xdr, arg->seqid);
1553 }
1554
1555 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556 {
1557 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558 encode_nfs4_stateid(xdr, &arg->stateid);
1559 encode_nfs4_seqid(xdr, arg->seqid);
1560 encode_share_access(xdr, arg->share_access);
1561 }
1562
1563 static void
1564 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565 {
1566 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567 encode_string(xdr, fh->size, fh->data);
1568 }
1569
1570 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571 {
1572 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573 }
1574
1575 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576 struct compound_hdr *hdr)
1577 {
1578 __be32 *p;
1579
1580 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581 encode_nfs4_stateid(xdr, &args->stateid);
1582
1583 p = reserve_space(xdr, 12);
1584 p = xdr_encode_hyper(p, args->offset);
1585 *p = cpu_to_be32(args->count);
1586 }
1587
1588 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589 {
1590 uint32_t attrs[3] = {
1591 FATTR4_WORD0_RDATTR_ERROR,
1592 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593 };
1594 uint32_t dircount = readdir->count >> 1;
1595 __be32 *p, verf[2];
1596 uint32_t attrlen = 0;
1597 unsigned int i;
1598
1599 if (readdir->plus) {
1600 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607 dircount >>= 1;
1608 }
1609 /* Use mounted_on_fileid only if the server supports it */
1610 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611 attrs[0] |= FATTR4_WORD0_FILEID;
1612 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613 attrs[i] &= readdir->bitmask[i];
1614 if (attrs[i] != 0)
1615 attrlen = i+1;
1616 }
1617
1618 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619 encode_uint64(xdr, readdir->cookie);
1620 encode_nfs4_verifier(xdr, &readdir->verifier);
1621 p = reserve_space(xdr, 12 + (attrlen << 2));
1622 *p++ = cpu_to_be32(dircount);
1623 *p++ = cpu_to_be32(readdir->count);
1624 *p++ = cpu_to_be32(attrlen);
1625 for (i = 0; i < attrlen; i++)
1626 *p++ = cpu_to_be32(attrs[i]);
1627 memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630 __func__,
1631 (unsigned long long)readdir->cookie,
1632 verf[0], verf[1],
1633 attrs[0] & readdir->bitmask[0],
1634 attrs[1] & readdir->bitmask[1],
1635 attrs[2] & readdir->bitmask[2]);
1636 }
1637
1638 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639 {
1640 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641 }
1642
1643 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644 {
1645 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646 encode_string(xdr, name->len, name->name);
1647 }
1648
1649 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650 {
1651 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652 encode_string(xdr, oldname->len, oldname->name);
1653 encode_string(xdr, newname->len, newname->name);
1654 }
1655
1656 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657 struct compound_hdr *hdr)
1658 {
1659 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660 encode_uint64(xdr, clid);
1661 }
1662
1663 static void
1664 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665 {
1666 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667 }
1668
1669 static void
1670 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671 {
1672 __be32 *p;
1673
1674 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675 encode_nfs4_stateid(xdr, &zero_stateid);
1676 p = reserve_space(xdr, 2*4);
1677 *p++ = cpu_to_be32(1);
1678 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679 p = reserve_space(xdr, 4);
1680 *p = cpu_to_be32(arg->acl_len);
1681 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682 }
1683
1684 static void
1685 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688 }
1689
1690 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691 {
1692 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693 encode_nfs4_stateid(xdr, &arg->stateid);
1694 encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695 }
1696
1697 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698 {
1699 __be32 *p;
1700
1701 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705 setclientid->sc_clnt->cl_owner_id);
1706 p = reserve_space(xdr, 4);
1707 *p = cpu_to_be32(setclientid->sc_prog);
1708 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712 }
1713
1714 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715 {
1716 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717 decode_setclientid_confirm_maxsz, hdr);
1718 encode_uint64(xdr, arg->clientid);
1719 encode_nfs4_verifier(xdr, &arg->confirm);
1720 }
1721
1722 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723 struct compound_hdr *hdr)
1724 {
1725 __be32 *p;
1726
1727 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728 encode_nfs4_stateid(xdr, &args->stateid);
1729
1730 p = reserve_space(xdr, 16);
1731 p = xdr_encode_hyper(p, args->offset);
1732 *p++ = cpu_to_be32(args->stable);
1733 *p = cpu_to_be32(args->count);
1734
1735 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741 encode_nfs4_stateid(xdr, stateid);
1742 }
1743
1744 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745 {
1746 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747 encode_string(xdr, name->len, name->name);
1748 }
1749
1750 #if defined(CONFIG_NFS_V4_1)
1751 /* NFSv4.1 operations */
1752 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753 struct nfs41_bind_conn_to_session_args *args,
1754 struct compound_hdr *hdr)
1755 {
1756 __be32 *p;
1757
1758 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759 decode_bind_conn_to_session_maxsz, hdr);
1760 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761 p = xdr_reserve_space(xdr, 8);
1762 *p++ = cpu_to_be32(args->dir);
1763 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764 }
1765
1766 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767 {
1768 unsigned int i;
1769 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771 encode_uint32(xdr, op_map->u.words[i]);
1772 }
1773
1774 static void encode_exchange_id(struct xdr_stream *xdr,
1775 struct nfs41_exchange_id_args *args,
1776 struct compound_hdr *hdr)
1777 {
1778 __be32 *p;
1779 char impl_name[IMPL_NAME_LIMIT];
1780 int len = 0;
1781
1782 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783 encode_nfs4_verifier(xdr, args->verifier);
1784
1785 encode_string(xdr, strlen(args->client->cl_owner_id),
1786 args->client->cl_owner_id);
1787
1788 encode_uint32(xdr, args->flags);
1789 encode_uint32(xdr, args->state_protect.how);
1790
1791 switch (args->state_protect.how) {
1792 case SP4_NONE:
1793 break;
1794 case SP4_MACH_CRED:
1795 encode_op_map(xdr, &args->state_protect.enforce);
1796 encode_op_map(xdr, &args->state_protect.allow);
1797 break;
1798 default:
1799 WARN_ON_ONCE(1);
1800 break;
1801 }
1802
1803 if (send_implementation_id &&
1804 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806 <= sizeof(impl_name) + 1)
1807 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808 utsname()->sysname, utsname()->release,
1809 utsname()->version, utsname()->machine);
1810
1811 if (len > 0) {
1812 encode_uint32(xdr, 1); /* implementation id array length=1 */
1813
1814 encode_string(xdr,
1815 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817 encode_string(xdr, len, impl_name);
1818 /* just send zeros for nii_date - the date is in nii_name */
1819 p = reserve_space(xdr, 12);
1820 p = xdr_encode_hyper(p, 0);
1821 *p = cpu_to_be32(0);
1822 } else
1823 encode_uint32(xdr, 0); /* implementation id array length=0 */
1824 }
1825
1826 static void encode_create_session(struct xdr_stream *xdr,
1827 struct nfs41_create_session_args *args,
1828 struct compound_hdr *hdr)
1829 {
1830 __be32 *p;
1831 struct nfs_client *clp = args->client;
1832 struct rpc_clnt *clnt = clp->cl_rpcclient;
1833 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834 u32 max_resp_sz_cached;
1835
1836 /*
1837 * Assumes OPEN is the biggest non-idempotent compound.
1838 * 2 is the verifier.
1839 */
1840 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842
1843 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845 p = xdr_encode_hyper(p, args->clientid);
1846 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1847 *p++ = cpu_to_be32(args->flags); /*flags */
1848
1849 /* Fore Channel */
1850 *p++ = cpu_to_be32(0); /* header padding size */
1851 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1854 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1856 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1857
1858 /* Back Channel */
1859 *p++ = cpu_to_be32(0); /* header padding size */
1860 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1863 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1865 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1866
1867 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1868 *p++ = cpu_to_be32(1);
1869 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1870
1871 /* authsys_parms rfc1831 */
1872 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874 *p++ = cpu_to_be32(0); /* UID */
1875 *p++ = cpu_to_be32(0); /* GID */
1876 *p = cpu_to_be32(0); /* No more gids */
1877 }
1878
1879 static void encode_destroy_session(struct xdr_stream *xdr,
1880 struct nfs4_session *session,
1881 struct compound_hdr *hdr)
1882 {
1883 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885 }
1886
1887 static void encode_destroy_clientid(struct xdr_stream *xdr,
1888 uint64_t clientid,
1889 struct compound_hdr *hdr)
1890 {
1891 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892 encode_uint64(xdr, clientid);
1893 }
1894
1895 static void encode_reclaim_complete(struct xdr_stream *xdr,
1896 struct nfs41_reclaim_complete_args *args,
1897 struct compound_hdr *hdr)
1898 {
1899 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900 encode_uint32(xdr, args->one_fs);
1901 }
1902 #endif /* CONFIG_NFS_V4_1 */
1903
1904 static void encode_sequence(struct xdr_stream *xdr,
1905 const struct nfs4_sequence_args *args,
1906 struct compound_hdr *hdr)
1907 {
1908 #if defined(CONFIG_NFS_V4_1)
1909 struct nfs4_session *session;
1910 struct nfs4_slot_table *tp;
1911 struct nfs4_slot *slot = args->sa_slot;
1912 __be32 *p;
1913
1914 tp = slot->table;
1915 session = tp->session;
1916 if (!session)
1917 return;
1918
1919 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921 /*
1922 * Sessionid + seqid + slotid + max slotid + cache_this
1923 */
1924 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925 "max_slotid=%d cache_this=%d\n",
1926 __func__,
1927 ((u32 *)session->sess_id.data)[0],
1928 ((u32 *)session->sess_id.data)[1],
1929 ((u32 *)session->sess_id.data)[2],
1930 ((u32 *)session->sess_id.data)[3],
1931 slot->seq_nr, slot->slot_nr,
1932 tp->highest_used_slotid, args->sa_cache_this);
1933 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935 *p++ = cpu_to_be32(slot->seq_nr);
1936 *p++ = cpu_to_be32(slot->slot_nr);
1937 *p++ = cpu_to_be32(tp->highest_used_slotid);
1938 *p = cpu_to_be32(args->sa_cache_this);
1939 #endif /* CONFIG_NFS_V4_1 */
1940 }
1941
1942 #ifdef CONFIG_NFS_V4_1
1943 static void
1944 encode_getdeviceinfo(struct xdr_stream *xdr,
1945 const struct nfs4_getdeviceinfo_args *args,
1946 struct compound_hdr *hdr)
1947 {
1948 __be32 *p;
1949
1950 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953 NFS4_DEVICEID4_SIZE);
1954 *p++ = cpu_to_be32(args->pdev->layout_type);
1955 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1956
1957 p = reserve_space(xdr, 4 + 4);
1958 *p++ = cpu_to_be32(1); /* bitmap length */
1959 *p++ = cpu_to_be32(args->notify_types);
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 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 if (args->lastbytewritten != U64_MAX) {
2008 p = reserve_space(xdr, 20);
2009 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010 p = xdr_encode_hyper(p, args->lastbytewritten);
2011 } else {
2012 p = reserve_space(xdr, 12);
2013 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014 }
2015 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020 NFS_I(inode)->layout, xdr, args);
2021 } else {
2022 encode_uint32(xdr, args->layoutupdate_len);
2023 if (args->layoutupdate_pages) {
2024 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025 args->layoutupdate_len);
2026 }
2027 }
2028
2029 return 0;
2030 }
2031
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034 const struct nfs4_layoutreturn_args *args,
2035 struct compound_hdr *hdr)
2036 {
2037 const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038 __be32 *p;
2039
2040 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041 p = reserve_space(xdr, 16);
2042 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2043 *p++ = cpu_to_be32(args->layout_type);
2044 *p++ = cpu_to_be32(args->range.iomode);
2045 *p = cpu_to_be32(RETURN_FILE);
2046 p = reserve_space(xdr, 16);
2047 p = xdr_encode_hyper(p, args->range.offset);
2048 p = xdr_encode_hyper(p, args->range.length);
2049 spin_lock(&args->inode->i_lock);
2050 encode_nfs4_stateid(xdr, &args->stateid);
2051 spin_unlock(&args->inode->i_lock);
2052 if (args->ld_private->ops && args->ld_private->ops->encode)
2053 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054 else if (lr_ops->encode_layoutreturn)
2055 lr_ops->encode_layoutreturn(xdr, args);
2056 else
2057 encode_uint32(xdr, 0);
2058 }
2059
2060 static int
2061 encode_secinfo_no_name(struct xdr_stream *xdr,
2062 const struct nfs41_secinfo_no_name_args *args,
2063 struct compound_hdr *hdr)
2064 {
2065 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066 encode_uint32(xdr, args->style);
2067 return 0;
2068 }
2069
2070 static void encode_test_stateid(struct xdr_stream *xdr,
2071 struct nfs41_test_stateid_args *args,
2072 struct compound_hdr *hdr)
2073 {
2074 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075 encode_uint32(xdr, 1);
2076 encode_nfs4_stateid(xdr, args->stateid);
2077 }
2078
2079 static void encode_free_stateid(struct xdr_stream *xdr,
2080 struct nfs41_free_stateid_args *args,
2081 struct compound_hdr *hdr)
2082 {
2083 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084 encode_nfs4_stateid(xdr, &args->stateid);
2085 }
2086 #else
2087 static inline void
2088 encode_layoutreturn(struct xdr_stream *xdr,
2089 const struct nfs4_layoutreturn_args *args,
2090 struct compound_hdr *hdr)
2091 {
2092 }
2093 #endif /* CONFIG_NFS_V4_1 */
2094
2095 /*
2096 * END OF "GENERIC" ENCODE ROUTINES.
2097 */
2098
2099 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100 {
2101 #if defined(CONFIG_NFS_V4_1)
2102 struct nfs4_session *session = args->sa_slot->table->session;
2103 if (session)
2104 return session->clp->cl_mvops->minor_version;
2105 #endif /* CONFIG_NFS_V4_1 */
2106 return 0;
2107 }
2108
2109 /*
2110 * Encode an ACCESS request
2111 */
2112 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 const struct nfs4_accessargs *args)
2114 {
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 encode_compound_hdr(xdr, req, &hdr);
2120 encode_sequence(xdr, &args->seq_args, &hdr);
2121 encode_putfh(xdr, args->fh, &hdr);
2122 encode_access(xdr, args->access, &hdr);
2123 encode_getfattr(xdr, args->bitmask, &hdr);
2124 encode_nops(&hdr);
2125 }
2126
2127 /*
2128 * Encode LOOKUP request
2129 */
2130 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131 const struct nfs4_lookup_arg *args)
2132 {
2133 struct compound_hdr hdr = {
2134 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135 };
2136
2137 encode_compound_hdr(xdr, req, &hdr);
2138 encode_sequence(xdr, &args->seq_args, &hdr);
2139 encode_putfh(xdr, args->dir_fh, &hdr);
2140 encode_lookup(xdr, args->name, &hdr);
2141 encode_getfh(xdr, &hdr);
2142 encode_getfattr(xdr, args->bitmask, &hdr);
2143 encode_nops(&hdr);
2144 }
2145
2146 /*
2147 * Encode LOOKUP_ROOT request
2148 */
2149 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150 struct xdr_stream *xdr,
2151 const struct nfs4_lookup_root_arg *args)
2152 {
2153 struct compound_hdr hdr = {
2154 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155 };
2156
2157 encode_compound_hdr(xdr, req, &hdr);
2158 encode_sequence(xdr, &args->seq_args, &hdr);
2159 encode_putrootfh(xdr, &hdr);
2160 encode_getfh(xdr, &hdr);
2161 encode_getfattr(xdr, args->bitmask, &hdr);
2162 encode_nops(&hdr);
2163 }
2164
2165 /*
2166 * Encode REMOVE request
2167 */
2168 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169 const struct nfs_removeargs *args)
2170 {
2171 struct compound_hdr hdr = {
2172 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173 };
2174
2175 encode_compound_hdr(xdr, req, &hdr);
2176 encode_sequence(xdr, &args->seq_args, &hdr);
2177 encode_putfh(xdr, args->fh, &hdr);
2178 encode_remove(xdr, &args->name, &hdr);
2179 encode_nops(&hdr);
2180 }
2181
2182 /*
2183 * Encode RENAME request
2184 */
2185 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186 const struct nfs_renameargs *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->old_dir, &hdr);
2195 encode_savefh(xdr, &hdr);
2196 encode_putfh(xdr, args->new_dir, &hdr);
2197 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198 encode_nops(&hdr);
2199 }
2200
2201 /*
2202 * Encode LINK request
2203 */
2204 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205 const struct nfs4_link_arg *args)
2206 {
2207 struct compound_hdr hdr = {
2208 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209 };
2210
2211 encode_compound_hdr(xdr, req, &hdr);
2212 encode_sequence(xdr, &args->seq_args, &hdr);
2213 encode_putfh(xdr, args->fh, &hdr);
2214 encode_savefh(xdr, &hdr);
2215 encode_putfh(xdr, args->dir_fh, &hdr);
2216 encode_link(xdr, args->name, &hdr);
2217 encode_restorefh(xdr, &hdr);
2218 encode_getfattr(xdr, args->bitmask, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode CREATE request
2224 */
2225 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_create_arg *args)
2227 {
2228 struct compound_hdr hdr = {
2229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230 };
2231
2232 encode_compound_hdr(xdr, req, &hdr);
2233 encode_sequence(xdr, &args->seq_args, &hdr);
2234 encode_putfh(xdr, args->dir_fh, &hdr);
2235 encode_create(xdr, args, &hdr);
2236 encode_getfh(xdr, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239 }
2240
2241 /*
2242 * Encode SYMLINK request
2243 */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245 const struct nfs4_create_arg *args)
2246 {
2247 nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249
2250 /*
2251 * Encode GETATTR request
2252 */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254 const struct nfs4_getattr_arg *args)
2255 {
2256 struct compound_hdr hdr = {
2257 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258 };
2259
2260 encode_compound_hdr(xdr, req, &hdr);
2261 encode_sequence(xdr, &args->seq_args, &hdr);
2262 encode_putfh(xdr, args->fh, &hdr);
2263 encode_getfattr(xdr, args->bitmask, &hdr);
2264 encode_nops(&hdr);
2265 }
2266
2267 /*
2268 * Encode a CLOSE request
2269 */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271 struct nfs_closeargs *args)
2272 {
2273 struct compound_hdr hdr = {
2274 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275 };
2276
2277 encode_compound_hdr(xdr, req, &hdr);
2278 encode_sequence(xdr, &args->seq_args, &hdr);
2279 encode_putfh(xdr, args->fh, &hdr);
2280 if (args->lr_args)
2281 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282 if (args->bitmask != NULL)
2283 encode_getfattr(xdr, args->bitmask, &hdr);
2284 encode_close(xdr, args, &hdr);
2285 encode_nops(&hdr);
2286 }
2287
2288 /*
2289 * Encode an OPEN request
2290 */
2291 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292 struct nfs_openargs *args)
2293 {
2294 struct compound_hdr hdr = {
2295 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296 };
2297
2298 encode_compound_hdr(xdr, req, &hdr);
2299 encode_sequence(xdr, &args->seq_args, &hdr);
2300 encode_putfh(xdr, args->fh, &hdr);
2301 encode_open(xdr, args, &hdr);
2302 encode_getfh(xdr, &hdr);
2303 if (args->access)
2304 encode_access(xdr, args->access, &hdr);
2305 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306 encode_nops(&hdr);
2307 }
2308
2309 /*
2310 * Encode an OPEN_CONFIRM request
2311 */
2312 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313 struct xdr_stream *xdr,
2314 struct nfs_open_confirmargs *args)
2315 {
2316 struct compound_hdr hdr = {
2317 .nops = 0,
2318 };
2319
2320 encode_compound_hdr(xdr, req, &hdr);
2321 encode_putfh(xdr, args->fh, &hdr);
2322 encode_open_confirm(xdr, args, &hdr);
2323 encode_nops(&hdr);
2324 }
2325
2326 /*
2327 * Encode an OPEN request with no attributes.
2328 */
2329 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330 struct xdr_stream *xdr,
2331 struct nfs_openargs *args)
2332 {
2333 struct compound_hdr hdr = {
2334 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335 };
2336
2337 encode_compound_hdr(xdr, req, &hdr);
2338 encode_sequence(xdr, &args->seq_args, &hdr);
2339 encode_putfh(xdr, args->fh, &hdr);
2340 encode_open(xdr, args, &hdr);
2341 if (args->access)
2342 encode_access(xdr, args->access, &hdr);
2343 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344 encode_nops(&hdr);
2345 }
2346
2347 /*
2348 * Encode an OPEN_DOWNGRADE request
2349 */
2350 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351 struct xdr_stream *xdr,
2352 struct nfs_closeargs *args)
2353 {
2354 struct compound_hdr hdr = {
2355 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356 };
2357
2358 encode_compound_hdr(xdr, req, &hdr);
2359 encode_sequence(xdr, &args->seq_args, &hdr);
2360 encode_putfh(xdr, args->fh, &hdr);
2361 if (args->lr_args)
2362 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363 encode_open_downgrade(xdr, args, &hdr);
2364 encode_nops(&hdr);
2365 }
2366
2367 /*
2368 * Encode a LOCK request
2369 */
2370 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371 struct nfs_lock_args *args)
2372 {
2373 struct compound_hdr hdr = {
2374 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375 };
2376
2377 encode_compound_hdr(xdr, req, &hdr);
2378 encode_sequence(xdr, &args->seq_args, &hdr);
2379 encode_putfh(xdr, args->fh, &hdr);
2380 encode_lock(xdr, args, &hdr);
2381 encode_nops(&hdr);
2382 }
2383
2384 /*
2385 * Encode a LOCKT request
2386 */
2387 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388 struct nfs_lockt_args *args)
2389 {
2390 struct compound_hdr hdr = {
2391 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392 };
2393
2394 encode_compound_hdr(xdr, req, &hdr);
2395 encode_sequence(xdr, &args->seq_args, &hdr);
2396 encode_putfh(xdr, args->fh, &hdr);
2397 encode_lockt(xdr, args, &hdr);
2398 encode_nops(&hdr);
2399 }
2400
2401 /*
2402 * Encode a LOCKU request
2403 */
2404 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405 struct nfs_locku_args *args)
2406 {
2407 struct compound_hdr hdr = {
2408 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409 };
2410
2411 encode_compound_hdr(xdr, req, &hdr);
2412 encode_sequence(xdr, &args->seq_args, &hdr);
2413 encode_putfh(xdr, args->fh, &hdr);
2414 encode_locku(xdr, args, &hdr);
2415 encode_nops(&hdr);
2416 }
2417
2418 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419 struct xdr_stream *xdr,
2420 struct nfs_release_lockowner_args *args)
2421 {
2422 struct compound_hdr hdr = {
2423 .minorversion = 0,
2424 };
2425
2426 encode_compound_hdr(xdr, req, &hdr);
2427 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428 encode_nops(&hdr);
2429 }
2430
2431 /*
2432 * Encode a READLINK request
2433 */
2434 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435 const struct nfs4_readlink *args)
2436 {
2437 struct compound_hdr hdr = {
2438 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439 };
2440
2441 encode_compound_hdr(xdr, req, &hdr);
2442 encode_sequence(xdr, &args->seq_args, &hdr);
2443 encode_putfh(xdr, args->fh, &hdr);
2444 encode_readlink(xdr, args, req, &hdr);
2445
2446 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447 args->pgbase, args->pglen);
2448 encode_nops(&hdr);
2449 }
2450
2451 /*
2452 * Encode a READDIR request
2453 */
2454 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 const struct nfs4_readdir_arg *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_readdir(xdr, args, req, &hdr);
2465
2466 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467 args->pgbase, args->count);
2468 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469 __func__, hdr.replen << 2, args->pages,
2470 args->pgbase, args->count);
2471 encode_nops(&hdr);
2472 }
2473
2474 /*
2475 * Encode a READ request
2476 */
2477 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478 struct nfs_pgio_args *args)
2479 {
2480 struct compound_hdr hdr = {
2481 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482 };
2483
2484 encode_compound_hdr(xdr, req, &hdr);
2485 encode_sequence(xdr, &args->seq_args, &hdr);
2486 encode_putfh(xdr, args->fh, &hdr);
2487 encode_read(xdr, args, &hdr);
2488
2489 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490 args->pages, args->pgbase, args->count);
2491 req->rq_rcv_buf.flags |= XDRBUF_READ;
2492 encode_nops(&hdr);
2493 }
2494
2495 /*
2496 * Encode an SETATTR request
2497 */
2498 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499 struct nfs_setattrargs *args)
2500 {
2501 struct compound_hdr hdr = {
2502 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503 };
2504
2505 encode_compound_hdr(xdr, req, &hdr);
2506 encode_sequence(xdr, &args->seq_args, &hdr);
2507 encode_putfh(xdr, args->fh, &hdr);
2508 encode_setattr(xdr, args, args->server, &hdr);
2509 encode_getfattr(xdr, args->bitmask, &hdr);
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * Encode a GETACL request
2515 */
2516 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_getaclargs *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522 uint32_t replen;
2523
2524 encode_compound_hdr(xdr, req, &hdr);
2525 encode_sequence(xdr, &args->seq_args, &hdr);
2526 encode_putfh(xdr, args->fh, &hdr);
2527 replen = hdr.replen + op_decode_hdr_maxsz;
2528 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531 args->acl_pages, 0, args->acl_len);
2532
2533 encode_nops(&hdr);
2534 }
2535
2536 /*
2537 * Encode a WRITE request
2538 */
2539 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 struct nfs_pgio_args *args)
2541 {
2542 struct compound_hdr hdr = {
2543 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544 };
2545
2546 encode_compound_hdr(xdr, req, &hdr);
2547 encode_sequence(xdr, &args->seq_args, &hdr);
2548 encode_putfh(xdr, args->fh, &hdr);
2549 encode_write(xdr, args, &hdr);
2550 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551 if (args->bitmask)
2552 encode_getfattr(xdr, args->bitmask, &hdr);
2553 encode_nops(&hdr);
2554 }
2555
2556 /*
2557 * a COMMIT request
2558 */
2559 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560 struct nfs_commitargs *args)
2561 {
2562 struct compound_hdr hdr = {
2563 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564 };
2565
2566 encode_compound_hdr(xdr, req, &hdr);
2567 encode_sequence(xdr, &args->seq_args, &hdr);
2568 encode_putfh(xdr, args->fh, &hdr);
2569 encode_commit(xdr, args, &hdr);
2570 encode_nops(&hdr);
2571 }
2572
2573 /*
2574 * FSINFO request
2575 */
2576 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577 struct nfs4_fsinfo_arg *args)
2578 {
2579 struct compound_hdr hdr = {
2580 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581 };
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 encode_fsinfo(xdr, args->bitmask, &hdr);
2587 encode_nops(&hdr);
2588 }
2589
2590 /*
2591 * a PATHCONF request
2592 */
2593 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594 const struct nfs4_pathconf_arg *args)
2595 {
2596 struct compound_hdr hdr = {
2597 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598 };
2599
2600 encode_compound_hdr(xdr, req, &hdr);
2601 encode_sequence(xdr, &args->seq_args, &hdr);
2602 encode_putfh(xdr, args->fh, &hdr);
2603 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604 &hdr);
2605 encode_nops(&hdr);
2606 }
2607
2608 /*
2609 * a STATFS request
2610 */
2611 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612 const struct nfs4_statfs_arg *args)
2613 {
2614 struct compound_hdr hdr = {
2615 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616 };
2617
2618 encode_compound_hdr(xdr, req, &hdr);
2619 encode_sequence(xdr, &args->seq_args, &hdr);
2620 encode_putfh(xdr, args->fh, &hdr);
2621 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623 encode_nops(&hdr);
2624 }
2625
2626 /*
2627 * GETATTR_BITMAP request
2628 */
2629 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630 struct xdr_stream *xdr,
2631 struct nfs4_server_caps_arg *args)
2632 {
2633 const u32 *bitmask = args->bitmask;
2634 struct compound_hdr hdr = {
2635 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636 };
2637
2638 encode_compound_hdr(xdr, req, &hdr);
2639 encode_sequence(xdr, &args->seq_args, &hdr);
2640 encode_putfh(xdr, args->fhandle, &hdr);
2641 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642 encode_nops(&hdr);
2643 }
2644
2645 /*
2646 * a RENEW request
2647 */
2648 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649 struct nfs_client *clp)
2650 {
2651 struct compound_hdr hdr = {
2652 .nops = 0,
2653 };
2654
2655 encode_compound_hdr(xdr, req, &hdr);
2656 encode_renew(xdr, clp->cl_clientid, &hdr);
2657 encode_nops(&hdr);
2658 }
2659
2660 /*
2661 * a SETCLIENTID request
2662 */
2663 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 struct nfs4_setclientid *sc)
2666 {
2667 struct compound_hdr hdr = {
2668 .nops = 0,
2669 };
2670
2671 encode_compound_hdr(xdr, req, &hdr);
2672 encode_setclientid(xdr, sc, &hdr);
2673 encode_nops(&hdr);
2674 }
2675
2676 /*
2677 * a SETCLIENTID_CONFIRM request
2678 */
2679 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680 struct xdr_stream *xdr,
2681 struct nfs4_setclientid_res *arg)
2682 {
2683 struct compound_hdr hdr = {
2684 .nops = 0,
2685 };
2686
2687 encode_compound_hdr(xdr, req, &hdr);
2688 encode_setclientid_confirm(xdr, arg, &hdr);
2689 encode_nops(&hdr);
2690 }
2691
2692 /*
2693 * DELEGRETURN request
2694 */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696 struct xdr_stream *xdr,
2697 const struct nfs4_delegreturnargs *args)
2698 {
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 if (args->lr_args)
2707 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708 if (args->bitmask)
2709 encode_getfattr(xdr, args->bitmask, &hdr);
2710 encode_delegreturn(xdr, args->stateid, &hdr);
2711 encode_nops(&hdr);
2712 }
2713
2714 /*
2715 * Encode FS_LOCATIONS request
2716 */
2717 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2718 struct xdr_stream *xdr,
2719 struct nfs4_fs_locations_arg *args)
2720 {
2721 struct compound_hdr hdr = {
2722 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2723 };
2724 uint32_t replen;
2725
2726 encode_compound_hdr(xdr, req, &hdr);
2727 encode_sequence(xdr, &args->seq_args, &hdr);
2728 if (args->migration) {
2729 encode_putfh(xdr, args->fh, &hdr);
2730 replen = hdr.replen;
2731 encode_fs_locations(xdr, args->bitmask, &hdr);
2732 if (args->renew)
2733 encode_renew(xdr, args->clientid, &hdr);
2734 } else {
2735 encode_putfh(xdr, args->dir_fh, &hdr);
2736 encode_lookup(xdr, args->name, &hdr);
2737 replen = hdr.replen;
2738 encode_fs_locations(xdr, args->bitmask, &hdr);
2739 }
2740
2741 /* Set up reply kvec to capture returned fs_locations array. */
2742 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2743 0, PAGE_SIZE);
2744 encode_nops(&hdr);
2745 }
2746
2747 /*
2748 * Encode SECINFO request
2749 */
2750 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2751 struct xdr_stream *xdr,
2752 struct nfs4_secinfo_arg *args)
2753 {
2754 struct compound_hdr hdr = {
2755 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2756 };
2757
2758 encode_compound_hdr(xdr, req, &hdr);
2759 encode_sequence(xdr, &args->seq_args, &hdr);
2760 encode_putfh(xdr, args->dir_fh, &hdr);
2761 encode_secinfo(xdr, args->name, &hdr);
2762 encode_nops(&hdr);
2763 }
2764
2765 /*
2766 * Encode FSID_PRESENT request
2767 */
2768 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2769 struct xdr_stream *xdr,
2770 struct nfs4_fsid_present_arg *args)
2771 {
2772 struct compound_hdr hdr = {
2773 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774 };
2775
2776 encode_compound_hdr(xdr, req, &hdr);
2777 encode_sequence(xdr, &args->seq_args, &hdr);
2778 encode_putfh(xdr, args->fh, &hdr);
2779 encode_getfh(xdr, &hdr);
2780 if (args->renew)
2781 encode_renew(xdr, args->clientid, &hdr);
2782 encode_nops(&hdr);
2783 }
2784
2785 #if defined(CONFIG_NFS_V4_1)
2786 /*
2787 * BIND_CONN_TO_SESSION request
2788 */
2789 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2790 struct xdr_stream *xdr,
2791 struct nfs41_bind_conn_to_session_args *args)
2792 {
2793 struct compound_hdr hdr = {
2794 .minorversion = args->client->cl_mvops->minor_version,
2795 };
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_bind_conn_to_session(xdr, args, &hdr);
2799 encode_nops(&hdr);
2800 }
2801
2802 /*
2803 * EXCHANGE_ID request
2804 */
2805 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2806 struct xdr_stream *xdr,
2807 struct nfs41_exchange_id_args *args)
2808 {
2809 struct compound_hdr hdr = {
2810 .minorversion = args->client->cl_mvops->minor_version,
2811 };
2812
2813 encode_compound_hdr(xdr, req, &hdr);
2814 encode_exchange_id(xdr, args, &hdr);
2815 encode_nops(&hdr);
2816 }
2817
2818 /*
2819 * a CREATE_SESSION request
2820 */
2821 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 struct nfs41_create_session_args *args)
2824 {
2825 struct compound_hdr hdr = {
2826 .minorversion = args->client->cl_mvops->minor_version,
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_create_session(xdr, args, &hdr);
2831 encode_nops(&hdr);
2832 }
2833
2834 /*
2835 * a DESTROY_SESSION request
2836 */
2837 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2838 struct xdr_stream *xdr,
2839 struct nfs4_session *session)
2840 {
2841 struct compound_hdr hdr = {
2842 .minorversion = session->clp->cl_mvops->minor_version,
2843 };
2844
2845 encode_compound_hdr(xdr, req, &hdr);
2846 encode_destroy_session(xdr, session, &hdr);
2847 encode_nops(&hdr);
2848 }
2849
2850 /*
2851 * a DESTROY_CLIENTID request
2852 */
2853 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2854 struct xdr_stream *xdr,
2855 struct nfs_client *clp)
2856 {
2857 struct compound_hdr hdr = {
2858 .minorversion = clp->cl_mvops->minor_version,
2859 };
2860
2861 encode_compound_hdr(xdr, req, &hdr);
2862 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2863 encode_nops(&hdr);
2864 }
2865
2866 /*
2867 * a SEQUENCE request
2868 */
2869 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2870 struct nfs4_sequence_args *args)
2871 {
2872 struct compound_hdr hdr = {
2873 .minorversion = nfs4_xdr_minorversion(args),
2874 };
2875
2876 encode_compound_hdr(xdr, req, &hdr);
2877 encode_sequence(xdr, args, &hdr);
2878 encode_nops(&hdr);
2879 }
2880
2881 /*
2882 * a GET_LEASE_TIME request
2883 */
2884 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2885 struct xdr_stream *xdr,
2886 struct nfs4_get_lease_time_args *args)
2887 {
2888 struct compound_hdr hdr = {
2889 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2890 };
2891 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2892
2893 encode_compound_hdr(xdr, req, &hdr);
2894 encode_sequence(xdr, &args->la_seq_args, &hdr);
2895 encode_putrootfh(xdr, &hdr);
2896 encode_fsinfo(xdr, lease_bitmap, &hdr);
2897 encode_nops(&hdr);
2898 }
2899
2900 /*
2901 * a RECLAIM_COMPLETE request
2902 */
2903 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2904 struct xdr_stream *xdr,
2905 struct nfs41_reclaim_complete_args *args)
2906 {
2907 struct compound_hdr hdr = {
2908 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2909 };
2910
2911 encode_compound_hdr(xdr, req, &hdr);
2912 encode_sequence(xdr, &args->seq_args, &hdr);
2913 encode_reclaim_complete(xdr, args, &hdr);
2914 encode_nops(&hdr);
2915 }
2916
2917 /*
2918 * Encode GETDEVICEINFO request
2919 */
2920 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2921 struct xdr_stream *xdr,
2922 struct nfs4_getdeviceinfo_args *args)
2923 {
2924 struct compound_hdr hdr = {
2925 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926 };
2927
2928 encode_compound_hdr(xdr, req, &hdr);
2929 encode_sequence(xdr, &args->seq_args, &hdr);
2930 encode_getdeviceinfo(xdr, args, &hdr);
2931
2932 /* set up reply kvec. Subtract notification bitmap max size (2)
2933 * so that notification bitmap is put in xdr_buf tail */
2934 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2935 args->pdev->pages, args->pdev->pgbase,
2936 args->pdev->pglen);
2937
2938 encode_nops(&hdr);
2939 }
2940
2941 /*
2942 * Encode LAYOUTGET request
2943 */
2944 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2945 struct xdr_stream *xdr,
2946 struct nfs4_layoutget_args *args)
2947 {
2948 struct compound_hdr hdr = {
2949 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950 };
2951
2952 encode_compound_hdr(xdr, req, &hdr);
2953 encode_sequence(xdr, &args->seq_args, &hdr);
2954 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955 encode_layoutget(xdr, args, &hdr);
2956
2957 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2958 args->layout.pages, 0, args->layout.pglen);
2959
2960 encode_nops(&hdr);
2961 }
2962
2963 /*
2964 * Encode LAYOUTCOMMIT request
2965 */
2966 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2967 struct xdr_stream *xdr,
2968 struct nfs4_layoutcommit_args *args)
2969 {
2970 struct nfs4_layoutcommit_data *data =
2971 container_of(args, struct nfs4_layoutcommit_data, args);
2972 struct compound_hdr hdr = {
2973 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2974 };
2975
2976 encode_compound_hdr(xdr, req, &hdr);
2977 encode_sequence(xdr, &args->seq_args, &hdr);
2978 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2979 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2980 encode_getfattr(xdr, args->bitmask, &hdr);
2981 encode_nops(&hdr);
2982 }
2983
2984 /*
2985 * Encode LAYOUTRETURN request
2986 */
2987 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2988 struct xdr_stream *xdr,
2989 struct nfs4_layoutreturn_args *args)
2990 {
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2998 encode_layoutreturn(xdr, args, &hdr);
2999 encode_nops(&hdr);
3000 }
3001
3002 /*
3003 * Encode SECINFO_NO_NAME request
3004 */
3005 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3006 struct xdr_stream *xdr,
3007 struct nfs41_secinfo_no_name_args *args)
3008 {
3009 struct compound_hdr hdr = {
3010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011 };
3012
3013 encode_compound_hdr(xdr, req, &hdr);
3014 encode_sequence(xdr, &args->seq_args, &hdr);
3015 encode_putrootfh(xdr, &hdr);
3016 encode_secinfo_no_name(xdr, args, &hdr);
3017 encode_nops(&hdr);
3018 return 0;
3019 }
3020
3021 /*
3022 * Encode TEST_STATEID request
3023 */
3024 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3025 struct xdr_stream *xdr,
3026 struct nfs41_test_stateid_args *args)
3027 {
3028 struct compound_hdr hdr = {
3029 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3030 };
3031
3032 encode_compound_hdr(xdr, req, &hdr);
3033 encode_sequence(xdr, &args->seq_args, &hdr);
3034 encode_test_stateid(xdr, args, &hdr);
3035 encode_nops(&hdr);
3036 }
3037
3038 /*
3039 * Encode FREE_STATEID request
3040 */
3041 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3042 struct xdr_stream *xdr,
3043 struct nfs41_free_stateid_args *args)
3044 {
3045 struct compound_hdr hdr = {
3046 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3047 };
3048
3049 encode_compound_hdr(xdr, req, &hdr);
3050 encode_sequence(xdr, &args->seq_args, &hdr);
3051 encode_free_stateid(xdr, args, &hdr);
3052 encode_nops(&hdr);
3053 }
3054 #endif /* CONFIG_NFS_V4_1 */
3055
3056 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3057 {
3058 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3059 "Remaining buffer length is %tu words.\n",
3060 func, xdr->end - xdr->p);
3061 }
3062
3063 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3064 {
3065 __be32 *p;
3066
3067 p = xdr_inline_decode(xdr, 4);
3068 if (unlikely(!p))
3069 goto out_overflow;
3070 *len = be32_to_cpup(p);
3071 p = xdr_inline_decode(xdr, *len);
3072 if (unlikely(!p))
3073 goto out_overflow;
3074 *string = (char *)p;
3075 return 0;
3076 out_overflow:
3077 print_overflow_msg(__func__, xdr);
3078 return -EIO;
3079 }
3080
3081 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3082 {
3083 __be32 *p;
3084
3085 p = xdr_inline_decode(xdr, 8);
3086 if (unlikely(!p))
3087 goto out_overflow;
3088 hdr->status = be32_to_cpup(p++);
3089 hdr->taglen = be32_to_cpup(p);
3090
3091 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3092 if (unlikely(!p))
3093 goto out_overflow;
3094 hdr->tag = (char *)p;
3095 p += XDR_QUADLEN(hdr->taglen);
3096 hdr->nops = be32_to_cpup(p);
3097 if (unlikely(hdr->nops < 1))
3098 return nfs4_stat_to_errno(hdr->status);
3099 return 0;
3100 out_overflow:
3101 print_overflow_msg(__func__, xdr);
3102 return -EIO;
3103 }
3104
3105 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3106 int *nfs_retval)
3107 {
3108 __be32 *p;
3109 uint32_t opnum;
3110 int32_t nfserr;
3111
3112 p = xdr_inline_decode(xdr, 8);
3113 if (unlikely(!p))
3114 goto out_overflow;
3115 opnum = be32_to_cpup(p++);
3116 if (unlikely(opnum != expected))
3117 goto out_bad_operation;
3118 nfserr = be32_to_cpup(p);
3119 if (nfserr == NFS_OK)
3120 *nfs_retval = 0;
3121 else
3122 *nfs_retval = nfs4_stat_to_errno(nfserr);
3123 return true;
3124 out_bad_operation:
3125 dprintk("nfs: Server returned operation"
3126 " %d but we issued a request for %d\n",
3127 opnum, expected);
3128 *nfs_retval = -EREMOTEIO;
3129 return false;
3130 out_overflow:
3131 print_overflow_msg(__func__, xdr);
3132 *nfs_retval = -EIO;
3133 return false;
3134 }
3135
3136 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3137 {
3138 int retval;
3139
3140 __decode_op_hdr(xdr, expected, &retval);
3141 return retval;
3142 }
3143
3144 /* Dummy routine */
3145 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3146 {
3147 __be32 *p;
3148 unsigned int strlen;
3149 char *str;
3150
3151 p = xdr_inline_decode(xdr, 12);
3152 if (likely(p))
3153 return decode_opaque_inline(xdr, &strlen, &str);
3154 print_overflow_msg(__func__, xdr);
3155 return -EIO;
3156 }
3157
3158 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3159 {
3160 uint32_t bmlen;
3161 __be32 *p;
3162
3163 p = xdr_inline_decode(xdr, 4);
3164 if (unlikely(!p))
3165 goto out_overflow;
3166 bmlen = be32_to_cpup(p);
3167
3168 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3169 p = xdr_inline_decode(xdr, (bmlen << 2));
3170 if (unlikely(!p))
3171 goto out_overflow;
3172 if (bmlen > 0) {
3173 bitmap[0] = be32_to_cpup(p++);
3174 if (bmlen > 1) {
3175 bitmap[1] = be32_to_cpup(p++);
3176 if (bmlen > 2)
3177 bitmap[2] = be32_to_cpup(p);
3178 }
3179 }
3180 return 0;
3181 out_overflow:
3182 print_overflow_msg(__func__, xdr);
3183 return -EIO;
3184 }
3185
3186 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3187 {
3188 __be32 *p;
3189
3190 p = xdr_inline_decode(xdr, 4);
3191 if (unlikely(!p))
3192 goto out_overflow;
3193 *attrlen = be32_to_cpup(p);
3194 *savep = xdr_stream_pos(xdr);
3195 return 0;
3196 out_overflow:
3197 print_overflow_msg(__func__, xdr);
3198 return -EIO;
3199 }
3200
3201 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3202 {
3203 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3204 int ret;
3205 ret = decode_attr_bitmap(xdr, bitmask);
3206 if (unlikely(ret < 0))
3207 return ret;
3208 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3209 } else
3210 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3211 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3212 bitmask[0], bitmask[1], bitmask[2]);
3213 return 0;
3214 }
3215
3216 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3217 {
3218 __be32 *p;
3219 int ret = 0;
3220
3221 *type = 0;
3222 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3223 return -EIO;
3224 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3225 p = xdr_inline_decode(xdr, 4);
3226 if (unlikely(!p))
3227 goto out_overflow;
3228 *type = be32_to_cpup(p);
3229 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3230 dprintk("%s: bad type %d\n", __func__, *type);
3231 return -EIO;
3232 }
3233 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3234 ret = NFS_ATTR_FATTR_TYPE;
3235 }
3236 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3237 return ret;
3238 out_overflow:
3239 print_overflow_msg(__func__, xdr);
3240 return -EIO;
3241 }
3242
3243 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3244 uint32_t *bitmap, uint32_t *type)
3245 {
3246 __be32 *p;
3247
3248 *type = 0;
3249 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3250 return -EIO;
3251 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3252 p = xdr_inline_decode(xdr, 4);
3253 if (unlikely(!p))
3254 goto out_overflow;
3255 *type = be32_to_cpup(p);
3256 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3257 }
3258 dprintk("%s: expire type=0x%x\n", __func__, *type);
3259 return 0;
3260 out_overflow:
3261 print_overflow_msg(__func__, xdr);
3262 return -EIO;
3263 }
3264
3265 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3266 {
3267 __be32 *p;
3268 int ret = 0;
3269
3270 *change = 0;
3271 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3272 return -EIO;
3273 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3274 p = xdr_inline_decode(xdr, 8);
3275 if (unlikely(!p))
3276 goto out_overflow;
3277 xdr_decode_hyper(p, change);
3278 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3279 ret = NFS_ATTR_FATTR_CHANGE;
3280 }
3281 dprintk("%s: change attribute=%Lu\n", __func__,
3282 (unsigned long long)*change);
3283 return ret;
3284 out_overflow:
3285 print_overflow_msg(__func__, xdr);
3286 return -EIO;
3287 }
3288
3289 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3290 {
3291 __be32 *p;
3292 int ret = 0;
3293
3294 *size = 0;
3295 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3296 return -EIO;
3297 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3298 p = xdr_inline_decode(xdr, 8);
3299 if (unlikely(!p))
3300 goto out_overflow;
3301 xdr_decode_hyper(p, size);
3302 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3303 ret = NFS_ATTR_FATTR_SIZE;
3304 }
3305 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3306 return ret;
3307 out_overflow:
3308 print_overflow_msg(__func__, xdr);
3309 return -EIO;
3310 }
3311
3312 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3313 {
3314 __be32 *p;
3315
3316 *res = 0;
3317 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3318 return -EIO;
3319 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3320 p = xdr_inline_decode(xdr, 4);
3321 if (unlikely(!p))
3322 goto out_overflow;
3323 *res = be32_to_cpup(p);
3324 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3325 }
3326 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3327 return 0;
3328 out_overflow:
3329 print_overflow_msg(__func__, xdr);
3330 return -EIO;
3331 }
3332
3333 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3334 {
3335 __be32 *p;
3336
3337 *res = 0;
3338 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3339 return -EIO;
3340 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3341 p = xdr_inline_decode(xdr, 4);
3342 if (unlikely(!p))
3343 goto out_overflow;
3344 *res = be32_to_cpup(p);
3345 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3346 }
3347 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3348 return 0;
3349 out_overflow:
3350 print_overflow_msg(__func__, xdr);
3351 return -EIO;
3352 }
3353
3354 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3355 {
3356 __be32 *p;
3357 int ret = 0;
3358
3359 fsid->major = 0;
3360 fsid->minor = 0;
3361 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3362 return -EIO;
3363 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3364 p = xdr_inline_decode(xdr, 16);
3365 if (unlikely(!p))
3366 goto out_overflow;
3367 p = xdr_decode_hyper(p, &fsid->major);
3368 xdr_decode_hyper(p, &fsid->minor);
3369 bitmap[0] &= ~FATTR4_WORD0_FSID;
3370 ret = NFS_ATTR_FATTR_FSID;
3371 }
3372 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3373 (unsigned long long)fsid->major,
3374 (unsigned long long)fsid->minor);
3375 return ret;
3376 out_overflow:
3377 print_overflow_msg(__func__, xdr);
3378 return -EIO;
3379 }
3380
3381 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382 {
3383 __be32 *p;
3384
3385 *res = 60;
3386 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3387 return -EIO;
3388 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3389 p = xdr_inline_decode(xdr, 4);
3390 if (unlikely(!p))
3391 goto out_overflow;
3392 *res = be32_to_cpup(p);
3393 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3394 }
3395 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3396 return 0;
3397 out_overflow:
3398 print_overflow_msg(__func__, xdr);
3399 return -EIO;
3400 }
3401
3402 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3403 {
3404 __be32 *p;
3405
3406 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3407 return -EIO;
3408 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3409 p = xdr_inline_decode(xdr, 4);
3410 if (unlikely(!p))
3411 goto out_overflow;
3412 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3413 *res = -be32_to_cpup(p);
3414 }
3415 return 0;
3416 out_overflow:
3417 print_overflow_msg(__func__, xdr);
3418 return -EIO;
3419 }
3420
3421 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3422 uint32_t *bitmap, uint32_t *bitmask)
3423 {
3424 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3425 int ret;
3426 ret = decode_attr_bitmap(xdr, bitmask);
3427 if (unlikely(ret < 0))
3428 return ret;
3429 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3430 } else
3431 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3432 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3433 bitmask[0], bitmask[1], bitmask[2]);
3434 return 0;
3435 }
3436
3437 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3438 {
3439 __be32 *p;
3440 int len;
3441
3442 if (fh != NULL)
3443 memset(fh, 0, sizeof(*fh));
3444
3445 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3448 p = xdr_inline_decode(xdr, 4);
3449 if (unlikely(!p))
3450 goto out_overflow;
3451 len = be32_to_cpup(p);
3452 if (len > NFS4_FHSIZE)
3453 return -EIO;
3454 p = xdr_inline_decode(xdr, len);
3455 if (unlikely(!p))
3456 goto out_overflow;
3457 if (fh != NULL) {
3458 memcpy(fh->data, p, len);
3459 fh->size = len;
3460 }
3461 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3462 }
3463 return 0;
3464 out_overflow:
3465 print_overflow_msg(__func__, xdr);
3466 return -EIO;
3467 }
3468
3469 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3470 {
3471 __be32 *p;
3472
3473 *res = 0;
3474 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3475 return -EIO;
3476 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3477 p = xdr_inline_decode(xdr, 4);
3478 if (unlikely(!p))
3479 goto out_overflow;
3480 *res = be32_to_cpup(p);
3481 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3482 }
3483 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3484 return 0;
3485 out_overflow:
3486 print_overflow_msg(__func__, xdr);
3487 return -EIO;
3488 }
3489
3490 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3491 {
3492 __be32 *p;
3493 int ret = 0;
3494
3495 *fileid = 0;
3496 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3497 return -EIO;
3498 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3499 p = xdr_inline_decode(xdr, 8);
3500 if (unlikely(!p))
3501 goto out_overflow;
3502 xdr_decode_hyper(p, fileid);
3503 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3504 ret = NFS_ATTR_FATTR_FILEID;
3505 }
3506 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3507 return ret;
3508 out_overflow:
3509 print_overflow_msg(__func__, xdr);
3510 return -EIO;
3511 }
3512
3513 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3514 {
3515 __be32 *p;
3516 int ret = 0;
3517
3518 *fileid = 0;
3519 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3520 return -EIO;
3521 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3522 p = xdr_inline_decode(xdr, 8);
3523 if (unlikely(!p))
3524 goto out_overflow;
3525 xdr_decode_hyper(p, fileid);
3526 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3527 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3528 }
3529 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3530 return ret;
3531 out_overflow:
3532 print_overflow_msg(__func__, xdr);
3533 return -EIO;
3534 }
3535
3536 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3537 {
3538 __be32 *p;
3539 int status = 0;
3540
3541 *res = 0;
3542 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3543 return -EIO;
3544 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3545 p = xdr_inline_decode(xdr, 8);
3546 if (unlikely(!p))
3547 goto out_overflow;
3548 xdr_decode_hyper(p, res);
3549 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3550 }
3551 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3552 return status;
3553 out_overflow:
3554 print_overflow_msg(__func__, xdr);
3555 return -EIO;
3556 }
3557
3558 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3559 {
3560 __be32 *p;
3561 int status = 0;
3562
3563 *res = 0;
3564 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3565 return -EIO;
3566 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3567 p = xdr_inline_decode(xdr, 8);
3568 if (unlikely(!p))
3569 goto out_overflow;
3570 xdr_decode_hyper(p, res);
3571 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3572 }
3573 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3574 return status;
3575 out_overflow:
3576 print_overflow_msg(__func__, xdr);
3577 return -EIO;
3578 }
3579
3580 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3581 {
3582 __be32 *p;
3583 int status = 0;
3584
3585 *res = 0;
3586 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3587 return -EIO;
3588 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3589 p = xdr_inline_decode(xdr, 8);
3590 if (unlikely(!p))
3591 goto out_overflow;
3592 xdr_decode_hyper(p, res);
3593 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3594 }
3595 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3596 return status;
3597 out_overflow:
3598 print_overflow_msg(__func__, xdr);
3599 return -EIO;
3600 }
3601
3602 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3603 {
3604 u32 n;
3605 __be32 *p;
3606 int status = 0;
3607
3608 p = xdr_inline_decode(xdr, 4);
3609 if (unlikely(!p))
3610 goto out_overflow;
3611 n = be32_to_cpup(p);
3612 if (n == 0)
3613 goto root_path;
3614 dprintk("pathname4: ");
3615 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3616 dprintk("cannot parse %d components in path\n", n);
3617 goto out_eio;
3618 }
3619 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3620 struct nfs4_string *component = &path->components[path->ncomponents];
3621 status = decode_opaque_inline(xdr, &component->len, &component->data);
3622 if (unlikely(status != 0))
3623 goto out_eio;
3624 ifdebug (XDR)
3625 pr_cont("%s%.*s ",
3626 (path->ncomponents != n ? "/ " : ""),
3627 component->len, component->data);
3628 }
3629 out:
3630 return status;
3631 root_path:
3632 /* a root pathname is sent as a zero component4 */
3633 path->ncomponents = 1;
3634 path->components[0].len=0;
3635 path->components[0].data=NULL;
3636 dprintk("pathname4: /\n");
3637 goto out;
3638 out_eio:
3639 dprintk(" status %d", status);
3640 status = -EIO;
3641 goto out;
3642 out_overflow:
3643 print_overflow_msg(__func__, xdr);
3644 return -EIO;
3645 }
3646
3647 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3648 {
3649 int n;
3650 __be32 *p;
3651 int status = -EIO;
3652
3653 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3654 goto out;
3655 status = 0;
3656 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3657 goto out;
3658 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3659 status = -EIO;
3660 /* Ignore borken servers that return unrequested attrs */
3661 if (unlikely(res == NULL))
3662 goto out;
3663 dprintk("%s: fsroot:\n", __func__);
3664 status = decode_pathname(xdr, &res->fs_path);
3665 if (unlikely(status != 0))
3666 goto out;
3667 p = xdr_inline_decode(xdr, 4);
3668 if (unlikely(!p))
3669 goto out_overflow;
3670 n = be32_to_cpup(p);
3671 if (n <= 0)
3672 goto out_eio;
3673 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3674 u32 m;
3675 struct nfs4_fs_location *loc;
3676
3677 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3678 break;
3679 loc = &res->locations[res->nlocations];
3680 p = xdr_inline_decode(xdr, 4);
3681 if (unlikely(!p))
3682 goto out_overflow;
3683 m = be32_to_cpup(p);
3684
3685 dprintk("%s: servers:\n", __func__);
3686 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3687 struct nfs4_string *server;
3688
3689 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3690 unsigned int i;
3691 dprintk("%s: using first %u of %u servers "
3692 "returned for location %u\n",
3693 __func__,
3694 NFS4_FS_LOCATION_MAXSERVERS,
3695 m, res->nlocations);
3696 for (i = loc->nservers; i < m; i++) {
3697 unsigned int len;
3698 char *data;
3699 status = decode_opaque_inline(xdr, &len, &data);
3700 if (unlikely(status != 0))
3701 goto out_eio;
3702 }
3703 break;
3704 }
3705 server = &loc->servers[loc->nservers];
3706 status = decode_opaque_inline(xdr, &server->len, &server->data);
3707 if (unlikely(status != 0))
3708 goto out_eio;
3709 dprintk("%s ", server->data);
3710 }
3711 status = decode_pathname(xdr, &loc->rootpath);
3712 if (unlikely(status != 0))
3713 goto out_eio;
3714 }
3715 if (res->nlocations != 0)
3716 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3717 out:
3718 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3719 return status;
3720 out_overflow:
3721 print_overflow_msg(__func__, xdr);
3722 out_eio:
3723 status = -EIO;
3724 goto out;
3725 }
3726
3727 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3728 {
3729 __be32 *p;
3730 int status = 0;
3731
3732 *res = 0;
3733 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3734 return -EIO;
3735 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3736 p = xdr_inline_decode(xdr, 8);
3737 if (unlikely(!p))
3738 goto out_overflow;
3739 xdr_decode_hyper(p, res);
3740 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3741 }
3742 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3743 return status;
3744 out_overflow:
3745 print_overflow_msg(__func__, xdr);
3746 return -EIO;
3747 }
3748
3749 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3750 {
3751 __be32 *p;
3752 int status = 0;
3753
3754 *maxlink = 1;
3755 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3756 return -EIO;
3757 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3758 p = xdr_inline_decode(xdr, 4);
3759 if (unlikely(!p))
3760 goto out_overflow;
3761 *maxlink = be32_to_cpup(p);
3762 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3763 }
3764 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3765 return status;
3766 out_overflow:
3767 print_overflow_msg(__func__, xdr);
3768 return -EIO;
3769 }
3770
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773 __be32 *p;
3774 int status = 0;
3775
3776 *maxname = 1024;
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778 return -EIO;
3779 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780 p = xdr_inline_decode(xdr, 4);
3781 if (unlikely(!p))
3782 goto out_overflow;
3783 *maxname = be32_to_cpup(p);
3784 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785 }
3786 dprintk("%s: maxname=%u\n", __func__, *maxname);
3787 return status;
3788 out_overflow:
3789 print_overflow_msg(__func__, xdr);
3790 return -EIO;
3791 }
3792
3793 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794 {
3795 __be32 *p;
3796 int status = 0;
3797
3798 *res = 1024;
3799 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800 return -EIO;
3801 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802 uint64_t maxread;
3803 p = xdr_inline_decode(xdr, 8);
3804 if (unlikely(!p))
3805 goto out_overflow;
3806 xdr_decode_hyper(p, &maxread);
3807 if (maxread > 0x7FFFFFFF)
3808 maxread = 0x7FFFFFFF;
3809 *res = (uint32_t)maxread;
3810 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811 }
3812 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813 return status;
3814 out_overflow:
3815 print_overflow_msg(__func__, xdr);
3816 return -EIO;
3817 }
3818
3819 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820 {
3821 __be32 *p;
3822 int status = 0;
3823
3824 *res = 1024;
3825 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826 return -EIO;
3827 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828 uint64_t maxwrite;
3829 p = xdr_inline_decode(xdr, 8);
3830 if (unlikely(!p))
3831 goto out_overflow;
3832 xdr_decode_hyper(p, &maxwrite);
3833 if (maxwrite > 0x7FFFFFFF)
3834 maxwrite = 0x7FFFFFFF;
3835 *res = (uint32_t)maxwrite;
3836 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837 }
3838 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839 return status;
3840 out_overflow:
3841 print_overflow_msg(__func__, xdr);
3842 return -EIO;
3843 }
3844
3845 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3846 {
3847 uint32_t tmp;
3848 __be32 *p;
3849 int ret = 0;
3850
3851 *mode = 0;
3852 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3853 return -EIO;
3854 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3855 p = xdr_inline_decode(xdr, 4);
3856 if (unlikely(!p))
3857 goto out_overflow;
3858 tmp = be32_to_cpup(p);
3859 *mode = tmp & ~S_IFMT;
3860 bitmap[1] &= ~FATTR4_WORD1_MODE;
3861 ret = NFS_ATTR_FATTR_MODE;
3862 }
3863 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3864 return ret;
3865 out_overflow:
3866 print_overflow_msg(__func__, xdr);
3867 return -EIO;
3868 }
3869
3870 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3871 {
3872 __be32 *p;
3873 int ret = 0;
3874
3875 *nlink = 1;
3876 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3877 return -EIO;
3878 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3879 p = xdr_inline_decode(xdr, 4);
3880 if (unlikely(!p))
3881 goto out_overflow;
3882 *nlink = be32_to_cpup(p);
3883 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3884 ret = NFS_ATTR_FATTR_NLINK;
3885 }
3886 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3887 return ret;
3888 out_overflow:
3889 print_overflow_msg(__func__, xdr);
3890 return -EIO;
3891 }
3892
3893 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3894 const struct nfs_server *server, kuid_t *uid,
3895 struct nfs4_string *owner_name)
3896 {
3897 uint32_t len;
3898 __be32 *p;
3899 int ret = 0;
3900
3901 *uid = make_kuid(&init_user_ns, -2);
3902 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903 return -EIO;
3904 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3905 p = xdr_inline_decode(xdr, 4);
3906 if (unlikely(!p))
3907 goto out_overflow;
3908 len = be32_to_cpup(p);
3909 p = xdr_inline_decode(xdr, len);
3910 if (unlikely(!p))
3911 goto out_overflow;
3912 if (owner_name != NULL) {
3913 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3914 if (owner_name->data != NULL) {
3915 owner_name->len = len;
3916 ret = NFS_ATTR_FATTR_OWNER_NAME;
3917 }
3918 } else if (len < XDR_MAX_NETOBJ) {
3919 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3920 ret = NFS_ATTR_FATTR_OWNER;
3921 else
3922 dprintk("%s: nfs_map_name_to_uid failed!\n",
3923 __func__);
3924 } else
3925 dprintk("%s: name too long (%u)!\n",
3926 __func__, len);
3927 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3928 }
3929 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3930 return ret;
3931 out_overflow:
3932 print_overflow_msg(__func__, xdr);
3933 return -EIO;
3934 }
3935
3936 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3937 const struct nfs_server *server, kgid_t *gid,
3938 struct nfs4_string *group_name)
3939 {
3940 uint32_t len;
3941 __be32 *p;
3942 int ret = 0;
3943
3944 *gid = make_kgid(&init_user_ns, -2);
3945 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3946 return -EIO;
3947 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3948 p = xdr_inline_decode(xdr, 4);
3949 if (unlikely(!p))
3950 goto out_overflow;
3951 len = be32_to_cpup(p);
3952 p = xdr_inline_decode(xdr, len);
3953 if (unlikely(!p))
3954 goto out_overflow;
3955 if (group_name != NULL) {
3956 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3957 if (group_name->data != NULL) {
3958 group_name->len = len;
3959 ret = NFS_ATTR_FATTR_GROUP_NAME;
3960 }
3961 } else if (len < XDR_MAX_NETOBJ) {
3962 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3963 ret = NFS_ATTR_FATTR_GROUP;
3964 else
3965 dprintk("%s: nfs_map_group_to_gid failed!\n",
3966 __func__);
3967 } else
3968 dprintk("%s: name too long (%u)!\n",
3969 __func__, len);
3970 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3971 }
3972 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3973 return ret;
3974 out_overflow:
3975 print_overflow_msg(__func__, xdr);
3976 return -EIO;
3977 }
3978
3979 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3980 {
3981 uint32_t major = 0, minor = 0;
3982 __be32 *p;
3983 int ret = 0;
3984
3985 *rdev = MKDEV(0,0);
3986 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3987 return -EIO;
3988 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3989 dev_t tmp;
3990
3991 p = xdr_inline_decode(xdr, 8);
3992 if (unlikely(!p))
3993 goto out_overflow;
3994 major = be32_to_cpup(p++);
3995 minor = be32_to_cpup(p);
3996 tmp = MKDEV(major, minor);
3997 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3998 *rdev = tmp;
3999 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4000 ret = NFS_ATTR_FATTR_RDEV;
4001 }
4002 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4003 return ret;
4004 out_overflow:
4005 print_overflow_msg(__func__, xdr);
4006 return -EIO;
4007 }
4008
4009 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011 __be32 *p;
4012 int status = 0;
4013
4014 *res = 0;
4015 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4016 return -EIO;
4017 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4018 p = xdr_inline_decode(xdr, 8);
4019 if (unlikely(!p))
4020 goto out_overflow;
4021 xdr_decode_hyper(p, res);
4022 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4023 }
4024 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4025 return status;
4026 out_overflow:
4027 print_overflow_msg(__func__, xdr);
4028 return -EIO;
4029 }
4030
4031 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032 {
4033 __be32 *p;
4034 int status = 0;
4035
4036 *res = 0;
4037 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4038 return -EIO;
4039 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4040 p = xdr_inline_decode(xdr, 8);
4041 if (unlikely(!p))
4042 goto out_overflow;
4043 xdr_decode_hyper(p, res);
4044 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4045 }
4046 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4047 return status;
4048 out_overflow:
4049 print_overflow_msg(__func__, xdr);
4050 return -EIO;
4051 }
4052
4053 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4054 {
4055 __be32 *p;
4056 int status = 0;
4057
4058 *res = 0;
4059 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4060 return -EIO;
4061 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4062 p = xdr_inline_decode(xdr, 8);
4063 if (unlikely(!p))
4064 goto out_overflow;
4065 xdr_decode_hyper(p, res);
4066 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4067 }
4068 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4069 return status;
4070 out_overflow:
4071 print_overflow_msg(__func__, xdr);
4072 return -EIO;
4073 }
4074
4075 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4076 {
4077 __be32 *p;
4078 int ret = 0;
4079
4080 *used = 0;
4081 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4082 return -EIO;
4083 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4084 p = xdr_inline_decode(xdr, 8);
4085 if (unlikely(!p))
4086 goto out_overflow;
4087 xdr_decode_hyper(p, used);
4088 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4089 ret = NFS_ATTR_FATTR_SPACE_USED;
4090 }
4091 dprintk("%s: space used=%Lu\n", __func__,
4092 (unsigned long long)*used);
4093 return ret;
4094 out_overflow:
4095 print_overflow_msg(__func__, xdr);
4096 return -EIO;
4097 }
4098
4099 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4100 {
4101 __be32 *p;
4102 uint64_t sec;
4103 uint32_t nsec;
4104
4105 p = xdr_inline_decode(xdr, 12);
4106 if (unlikely(!p))
4107 goto out_overflow;
4108 p = xdr_decode_hyper(p, &sec);
4109 nsec = be32_to_cpup(p);
4110 time->tv_sec = (time_t)sec;
4111 time->tv_nsec = (long)nsec;
4112 return 0;
4113 out_overflow:
4114 print_overflow_msg(__func__, xdr);
4115 return -EIO;
4116 }
4117
4118 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4119 {
4120 int status = 0;
4121
4122 time->tv_sec = 0;
4123 time->tv_nsec = 0;
4124 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4125 return -EIO;
4126 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4127 status = decode_attr_time(xdr, time);
4128 if (status == 0)
4129 status = NFS_ATTR_FATTR_ATIME;
4130 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4131 }
4132 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4133 return status;
4134 }
4135
4136 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4137 {
4138 int status = 0;
4139
4140 time->tv_sec = 0;
4141 time->tv_nsec = 0;
4142 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4143 return -EIO;
4144 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4145 status = decode_attr_time(xdr, time);
4146 if (status == 0)
4147 status = NFS_ATTR_FATTR_CTIME;
4148 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4149 }
4150 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4151 return status;
4152 }
4153
4154 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4155 struct timespec *time)
4156 {
4157 int status = 0;
4158
4159 time->tv_sec = 0;
4160 time->tv_nsec = 0;
4161 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4162 return -EIO;
4163 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4164 status = decode_attr_time(xdr, time);
4165 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4166 }
4167 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4168 (long)time->tv_nsec);
4169 return status;
4170 }
4171
4172 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4173 struct nfs4_label *label)
4174 {
4175 uint32_t pi = 0;
4176 uint32_t lfs = 0;
4177 __u32 len;
4178 __be32 *p;
4179 int status = 0;
4180
4181 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4182 return -EIO;
4183 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4184 p = xdr_inline_decode(xdr, 4);
4185 if (unlikely(!p))
4186 goto out_overflow;
4187 lfs = be32_to_cpup(p++);
4188 p = xdr_inline_decode(xdr, 4);
4189 if (unlikely(!p))
4190 goto out_overflow;
4191 pi = be32_to_cpup(p++);
4192 p = xdr_inline_decode(xdr, 4);
4193 if (unlikely(!p))
4194 goto out_overflow;
4195 len = be32_to_cpup(p++);
4196 p = xdr_inline_decode(xdr, len);
4197 if (unlikely(!p))
4198 goto out_overflow;
4199 if (len < NFS4_MAXLABELLEN) {
4200 if (label) {
4201 memcpy(label->label, p, len);
4202 label->len = len;
4203 label->pi = pi;
4204 label->lfs = lfs;
4205 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4206 }
4207 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4208 } else
4209 printk(KERN_WARNING "%s: label too long (%u)!\n",
4210 __func__, len);
4211 }
4212 if (label && label->label)
4213 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4214 (char *)label->label, label->len, label->pi, label->lfs);
4215 return status;
4216
4217 out_overflow:
4218 print_overflow_msg(__func__, xdr);
4219 return -EIO;
4220 }
4221
4222 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4223 {
4224 int status = 0;
4225
4226 time->tv_sec = 0;
4227 time->tv_nsec = 0;
4228 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4229 return -EIO;
4230 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4231 status = decode_attr_time(xdr, time);
4232 if (status == 0)
4233 status = NFS_ATTR_FATTR_MTIME;
4234 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4235 }
4236 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4237 return status;
4238 }
4239
4240 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4241 {
4242 unsigned int attrwords = XDR_QUADLEN(attrlen);
4243 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4244
4245 if (unlikely(attrwords != nwords)) {
4246 dprintk("%s: server returned incorrect attribute length: "
4247 "%u %c %u\n",
4248 __func__,
4249 attrwords << 2,
4250 (attrwords < nwords) ? '<' : '>',
4251 nwords << 2);
4252 return -EIO;
4253 }
4254 return 0;
4255 }
4256
4257 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4258 {
4259 __be32 *p;
4260
4261 p = xdr_inline_decode(xdr, 20);
4262 if (unlikely(!p))
4263 goto out_overflow;
4264 cinfo->atomic = be32_to_cpup(p++);
4265 p = xdr_decode_hyper(p, &cinfo->before);
4266 xdr_decode_hyper(p, &cinfo->after);
4267 return 0;
4268 out_overflow:
4269 print_overflow_msg(__func__, xdr);
4270 return -EIO;
4271 }
4272
4273 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4274 {
4275 __be32 *p;
4276 uint32_t supp, acc;
4277 int status;
4278
4279 status = decode_op_hdr(xdr, OP_ACCESS);
4280 if (status)
4281 return status;
4282 p = xdr_inline_decode(xdr, 8);
4283 if (unlikely(!p))
4284 goto out_overflow;
4285 supp = be32_to_cpup(p++);
4286 acc = be32_to_cpup(p);
4287 *supported = supp;
4288 *access = acc;
4289 return 0;
4290 out_overflow:
4291 print_overflow_msg(__func__, xdr);
4292 return -EIO;
4293 }
4294
4295 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4296 {
4297 __be32 *p;
4298
4299 p = xdr_inline_decode(xdr, len);
4300 if (likely(p)) {
4301 memcpy(buf, p, len);
4302 return 0;
4303 }
4304 print_overflow_msg(__func__, xdr);
4305 return -EIO;
4306 }
4307
4308 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4311 }
4312
4313 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314 {
4315 stateid->type = NFS4_OPEN_STATEID_TYPE;
4316 return decode_stateid(xdr, stateid);
4317 }
4318
4319 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320 {
4321 stateid->type = NFS4_LOCK_STATEID_TYPE;
4322 return decode_stateid(xdr, stateid);
4323 }
4324
4325 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326 {
4327 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4328 return decode_stateid(xdr, stateid);
4329 }
4330
4331 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4332 {
4333 int status;
4334
4335 status = decode_op_hdr(xdr, OP_CLOSE);
4336 if (status != -EIO)
4337 nfs_increment_open_seqid(status, res->seqid);
4338 if (!status)
4339 status = decode_open_stateid(xdr, &res->stateid);
4340 return status;
4341 }
4342
4343 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4344 {
4345 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4346 }
4347
4348 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4349 {
4350 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4351 }
4352
4353 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4354 {
4355 int status;
4356
4357 status = decode_op_hdr(xdr, OP_COMMIT);
4358 if (!status)
4359 status = decode_write_verifier(xdr, &res->verf->verifier);
4360 return status;
4361 }
4362
4363 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4364 {
4365 __be32 *p;
4366 uint32_t bmlen;
4367 int status;
4368
4369 status = decode_op_hdr(xdr, OP_CREATE);
4370 if (status)
4371 return status;
4372 if ((status = decode_change_info(xdr, cinfo)))
4373 return status;
4374 p = xdr_inline_decode(xdr, 4);
4375 if (unlikely(!p))
4376 goto out_overflow;
4377 bmlen = be32_to_cpup(p);
4378 p = xdr_inline_decode(xdr, bmlen << 2);
4379 if (likely(p))
4380 return 0;
4381 out_overflow:
4382 print_overflow_msg(__func__, xdr);
4383 return -EIO;
4384 }
4385
4386 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4387 {
4388 unsigned int savep;
4389 uint32_t attrlen, bitmap[3] = {0};
4390 int status;
4391
4392 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4393 goto xdr_error;
4394 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4395 goto xdr_error;
4396 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4397 goto xdr_error;
4398 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4399 goto xdr_error;
4400 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4401 &res->fh_expire_type)) != 0)
4402 goto xdr_error;
4403 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4404 goto xdr_error;
4405 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4406 goto xdr_error;
4407 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4408 goto xdr_error;
4409 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4410 res->exclcreat_bitmask)) != 0)
4411 goto xdr_error;
4412 status = verify_attr_len(xdr, savep, attrlen);
4413 xdr_error:
4414 dprintk("%s: xdr returned %d!\n", __func__, -status);
4415 return status;
4416 }
4417
4418 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4419 {
4420 unsigned int savep;
4421 uint32_t attrlen, bitmap[3] = {0};
4422 int status;
4423
4424 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4425 goto xdr_error;
4426 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4427 goto xdr_error;
4428 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4429 goto xdr_error;
4430
4431 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4432 goto xdr_error;
4433 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4434 goto xdr_error;
4435 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4436 goto xdr_error;
4437
4438 status = -EIO;
4439 if (unlikely(bitmap[0]))
4440 goto xdr_error;
4441
4442 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4443 goto xdr_error;
4444 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4445 goto xdr_error;
4446 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4447 goto xdr_error;
4448
4449 status = verify_attr_len(xdr, savep, attrlen);
4450 xdr_error:
4451 dprintk("%s: xdr returned %d!\n", __func__, -status);
4452 return status;
4453 }
4454
4455 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4456 {
4457 unsigned int savep;
4458 uint32_t attrlen, bitmap[3] = {0};
4459 int status;
4460
4461 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4462 goto xdr_error;
4463 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4464 goto xdr_error;
4465 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4466 goto xdr_error;
4467
4468 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4469 goto xdr_error;
4470 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4471 goto xdr_error;
4472
4473 status = verify_attr_len(xdr, savep, attrlen);
4474 xdr_error:
4475 dprintk("%s: xdr returned %d!\n", __func__, -status);
4476 return status;
4477 }
4478
4479 static int decode_threshold_hint(struct xdr_stream *xdr,
4480 uint32_t *bitmap,
4481 uint64_t *res,
4482 uint32_t hint_bit)
4483 {
4484 __be32 *p;
4485
4486 *res = 0;
4487 if (likely(bitmap[0] & hint_bit)) {
4488 p = xdr_inline_decode(xdr, 8);
4489 if (unlikely(!p))
4490 goto out_overflow;
4491 xdr_decode_hyper(p, res);
4492 }
4493 return 0;
4494 out_overflow:
4495 print_overflow_msg(__func__, xdr);
4496 return -EIO;
4497 }
4498
4499 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500 struct nfs4_threshold *res)
4501 {
4502 __be32 *p;
4503 unsigned int savep;
4504 uint32_t bitmap[3] = {0,}, attrlen;
4505 int status;
4506
4507 /* layout type */
4508 p = xdr_inline_decode(xdr, 4);
4509 if (unlikely(!p)) {
4510 print_overflow_msg(__func__, xdr);
4511 return -EIO;
4512 }
4513 res->l_type = be32_to_cpup(p);
4514
4515 /* thi_hintset bitmap */
4516 status = decode_attr_bitmap(xdr, bitmap);
4517 if (status < 0)
4518 goto xdr_error;
4519
4520 /* thi_hintlist length */
4521 status = decode_attr_length(xdr, &attrlen, &savep);
4522 if (status < 0)
4523 goto xdr_error;
4524 /* thi_hintlist */
4525 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4526 if (status < 0)
4527 goto xdr_error;
4528 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4529 if (status < 0)
4530 goto xdr_error;
4531 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4532 THRESHOLD_RD_IO);
4533 if (status < 0)
4534 goto xdr_error;
4535 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4536 THRESHOLD_WR_IO);
4537 if (status < 0)
4538 goto xdr_error;
4539
4540 status = verify_attr_len(xdr, savep, attrlen);
4541 res->bm = bitmap[0];
4542
4543 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4544 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4545 res->wr_io_sz);
4546 xdr_error:
4547 dprintk("%s ret=%d!\n", __func__, status);
4548 return status;
4549 }
4550
4551 /*
4552 * Thresholds on pNFS direct I/O vrs MDS I/O
4553 */
4554 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4555 uint32_t *bitmap,
4556 struct nfs4_threshold *res)
4557 {
4558 __be32 *p;
4559 int status = 0;
4560 uint32_t num;
4561
4562 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4563 return -EIO;
4564 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4565 /* Did the server return an unrequested attribute? */
4566 if (unlikely(res == NULL))
4567 return -EREMOTEIO;
4568 p = xdr_inline_decode(xdr, 4);
4569 if (unlikely(!p))
4570 goto out_overflow;
4571 num = be32_to_cpup(p);
4572 if (num == 0)
4573 return 0;
4574 if (num > 1)
4575 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4576 "drivers per filesystem not supported\n",
4577 __func__);
4578
4579 status = decode_first_threshold_item4(xdr, res);
4580 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4581 }
4582 return status;
4583 out_overflow:
4584 print_overflow_msg(__func__, xdr);
4585 return -EIO;
4586 }
4587
4588 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4589 struct nfs_fattr *fattr, struct nfs_fh *fh,
4590 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4591 const struct nfs_server *server)
4592 {
4593 int status;
4594 umode_t fmode = 0;
4595 uint32_t type;
4596 int32_t err;
4597
4598 status = decode_attr_type(xdr, bitmap, &type);
4599 if (status < 0)
4600 goto xdr_error;
4601 fattr->mode = 0;
4602 if (status != 0) {
4603 fattr->mode |= nfs_type2fmt[type];
4604 fattr->valid |= status;
4605 }
4606
4607 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_size(xdr, bitmap, &fattr->size);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 err = 0;
4623 status = decode_attr_error(xdr, bitmap, &err);
4624 if (status < 0)
4625 goto xdr_error;
4626
4627 status = decode_attr_filehandle(xdr, bitmap, fh);
4628 if (status < 0)
4629 goto xdr_error;
4630
4631 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4632 if (status < 0)
4633 goto xdr_error;
4634 fattr->valid |= status;
4635
4636 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4637 if (status < 0)
4638 goto xdr_error;
4639 fattr->valid |= status;
4640
4641 status = -EIO;
4642 if (unlikely(bitmap[0]))
4643 goto xdr_error;
4644
4645 status = decode_attr_mode(xdr, bitmap, &fmode);
4646 if (status < 0)
4647 goto xdr_error;
4648 if (status != 0) {
4649 fattr->mode |= fmode;
4650 fattr->valid |= status;
4651 }
4652
4653 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4654 if (status < 0)
4655 goto xdr_error;
4656 fattr->valid |= status;
4657
4658 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4659 if (status < 0)
4660 goto xdr_error;
4661 fattr->valid |= status;
4662
4663 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4664 if (status < 0)
4665 goto xdr_error;
4666 fattr->valid |= status;
4667
4668 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4669 if (status < 0)
4670 goto xdr_error;
4671 fattr->valid |= status;
4672
4673 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4674 if (status < 0)
4675 goto xdr_error;
4676 fattr->valid |= status;
4677
4678 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4679 if (status < 0)
4680 goto xdr_error;
4681 fattr->valid |= status;
4682
4683 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4684 if (status < 0)
4685 goto xdr_error;
4686 fattr->valid |= status;
4687
4688 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4689 if (status < 0)
4690 goto xdr_error;
4691 fattr->valid |= status;
4692
4693 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4694 if (status < 0)
4695 goto xdr_error;
4696 fattr->valid |= status;
4697
4698 status = -EIO;
4699 if (unlikely(bitmap[1]))
4700 goto xdr_error;
4701
4702 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4703 if (status < 0)
4704 goto xdr_error;
4705
4706 if (label) {
4707 status = decode_attr_security_label(xdr, bitmap, label);
4708 if (status < 0)
4709 goto xdr_error;
4710 fattr->valid |= status;
4711 }
4712
4713 xdr_error:
4714 dprintk("%s: xdr returned %d\n", __func__, -status);
4715 return status;
4716 }
4717
4718 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4720 struct nfs4_label *label, const struct nfs_server *server)
4721 {
4722 unsigned int savep;
4723 uint32_t attrlen,
4724 bitmap[3] = {0};
4725 int status;
4726
4727 status = decode_op_hdr(xdr, OP_GETATTR);
4728 if (status < 0)
4729 goto xdr_error;
4730
4731 status = decode_attr_bitmap(xdr, bitmap);
4732 if (status < 0)
4733 goto xdr_error;
4734
4735 status = decode_attr_length(xdr, &attrlen, &savep);
4736 if (status < 0)
4737 goto xdr_error;
4738
4739 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4740 label, server);
4741 if (status < 0)
4742 goto xdr_error;
4743
4744 status = verify_attr_len(xdr, savep, attrlen);
4745 xdr_error:
4746 dprintk("%s: xdr returned %d\n", __func__, -status);
4747 return status;
4748 }
4749
4750 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4751 struct nfs4_label *label, const struct nfs_server *server)
4752 {
4753 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4754 }
4755
4756 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4757 const struct nfs_server *server)
4758 {
4759 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4760 }
4761
4762 /*
4763 * Decode potentially multiple layout types.
4764 */
4765 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4766 struct nfs_fsinfo *fsinfo)
4767 {
4768 __be32 *p;
4769 uint32_t i;
4770
4771 p = xdr_inline_decode(xdr, 4);
4772 if (unlikely(!p))
4773 goto out_overflow;
4774 fsinfo->nlayouttypes = be32_to_cpup(p);
4775
4776 /* pNFS is not supported by the underlying file system */
4777 if (fsinfo->nlayouttypes == 0)
4778 return 0;
4779
4780 /* Decode and set first layout type, move xdr->p past unused types */
4781 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4782 if (unlikely(!p))
4783 goto out_overflow;
4784
4785 /* If we get too many, then just cap it at the max */
4786 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4787 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4788 __func__, fsinfo->nlayouttypes);
4789 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4790 }
4791
4792 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4793 fsinfo->layouttype[i] = be32_to_cpup(p++);
4794 return 0;
4795 out_overflow:
4796 print_overflow_msg(__func__, xdr);
4797 return -EIO;
4798 }
4799
4800 /*
4801 * The type of file system exported.
4802 * Note we must ensure that layouttype is set in any non-error case.
4803 */
4804 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4805 struct nfs_fsinfo *fsinfo)
4806 {
4807 int status = 0;
4808
4809 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4810 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4811 return -EIO;
4812 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4813 status = decode_pnfs_layout_types(xdr, fsinfo);
4814 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4815 }
4816 return status;
4817 }
4818
4819 /*
4820 * The prefered block size for layout directed io
4821 */
4822 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4823 uint32_t *res)
4824 {
4825 __be32 *p;
4826
4827 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4828 *res = 0;
4829 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4830 p = xdr_inline_decode(xdr, 4);
4831 if (unlikely(!p)) {
4832 print_overflow_msg(__func__, xdr);
4833 return -EIO;
4834 }
4835 *res = be32_to_cpup(p);
4836 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4837 }
4838 return 0;
4839 }
4840
4841 /*
4842 * The granularity of a CLONE operation.
4843 */
4844 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4845 uint32_t *res)
4846 {
4847 __be32 *p;
4848
4849 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4850 *res = 0;
4851 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4852 p = xdr_inline_decode(xdr, 4);
4853 if (unlikely(!p)) {
4854 print_overflow_msg(__func__, xdr);
4855 return -EIO;
4856 }
4857 *res = be32_to_cpup(p);
4858 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4859 }
4860 return 0;
4861 }
4862
4863 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4864 {
4865 unsigned int savep;
4866 uint32_t attrlen, bitmap[3];
4867 int status;
4868
4869 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4870 goto xdr_error;
4871 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4872 goto xdr_error;
4873 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4874 goto xdr_error;
4875
4876 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4877
4878 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4879 goto xdr_error;
4880 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4881 goto xdr_error;
4882 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4883 goto xdr_error;
4884 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4885 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4886 goto xdr_error;
4887 fsinfo->wtpref = fsinfo->wtmax;
4888
4889 status = -EIO;
4890 if (unlikely(bitmap[0]))
4891 goto xdr_error;
4892
4893 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4894 if (status != 0)
4895 goto xdr_error;
4896 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4897 if (status != 0)
4898 goto xdr_error;
4899
4900 status = -EIO;
4901 if (unlikely(bitmap[1]))
4902 goto xdr_error;
4903
4904 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4905 if (status)
4906 goto xdr_error;
4907 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4908 if (status)
4909 goto xdr_error;
4910
4911 status = verify_attr_len(xdr, savep, attrlen);
4912 xdr_error:
4913 dprintk("%s: xdr returned %d!\n", __func__, -status);
4914 return status;
4915 }
4916
4917 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4918 {
4919 __be32 *p;
4920 uint32_t len;
4921 int status;
4922
4923 /* Zero handle first to allow comparisons */
4924 memset(fh, 0, sizeof(*fh));
4925
4926 status = decode_op_hdr(xdr, OP_GETFH);
4927 if (status)
4928 return status;
4929
4930 p = xdr_inline_decode(xdr, 4);
4931 if (unlikely(!p))
4932 goto out_overflow;
4933 len = be32_to_cpup(p);
4934 if (len > NFS4_FHSIZE)
4935 return -EIO;
4936 fh->size = len;
4937 p = xdr_inline_decode(xdr, len);
4938 if (unlikely(!p))
4939 goto out_overflow;
4940 memcpy(fh->data, p, len);
4941 return 0;
4942 out_overflow:
4943 print_overflow_msg(__func__, xdr);
4944 return -EIO;
4945 }
4946
4947 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4948 {
4949 int status;
4950
4951 status = decode_op_hdr(xdr, OP_LINK);
4952 if (status)
4953 return status;
4954 return decode_change_info(xdr, cinfo);
4955 }
4956
4957 /*
4958 * We create the owner, so we know a proper owner.id length is 4.
4959 */
4960 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4961 {
4962 uint64_t offset, length, clientid;
4963 __be32 *p;
4964 uint32_t namelen, type;
4965
4966 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4967 if (unlikely(!p))
4968 goto out_overflow;
4969 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4970 p = xdr_decode_hyper(p, &length);
4971 type = be32_to_cpup(p++); /* 4 byte read */
4972 if (fl != NULL) { /* manipulate file lock */
4973 fl->fl_start = (loff_t)offset;
4974 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4975 if (length == ~(uint64_t)0)
4976 fl->fl_end = OFFSET_MAX;
4977 fl->fl_type = F_WRLCK;
4978 if (type & 1)
4979 fl->fl_type = F_RDLCK;
4980 fl->fl_pid = 0;
4981 }
4982 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4983 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4984 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4985 if (likely(p))
4986 return -NFS4ERR_DENIED;
4987 out_overflow:
4988 print_overflow_msg(__func__, xdr);
4989 return -EIO;
4990 }
4991
4992 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4993 {
4994 int status;
4995
4996 status = decode_op_hdr(xdr, OP_LOCK);
4997 if (status == -EIO)
4998 goto out;
4999 if (status == 0) {
5000 status = decode_lock_stateid(xdr, &res->stateid);
5001 if (unlikely(status))
5002 goto out;
5003 } else if (status == -NFS4ERR_DENIED)
5004 status = decode_lock_denied(xdr, NULL);
5005 if (res->open_seqid != NULL)
5006 nfs_increment_open_seqid(status, res->open_seqid);
5007 nfs_increment_lock_seqid(status, res->lock_seqid);
5008 out:
5009 return status;
5010 }
5011
5012 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5013 {
5014 int status;
5015 status = decode_op_hdr(xdr, OP_LOCKT);
5016 if (status == -NFS4ERR_DENIED)
5017 return decode_lock_denied(xdr, res->denied);
5018 return status;
5019 }
5020
5021 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5022 {
5023 int status;
5024
5025 status = decode_op_hdr(xdr, OP_LOCKU);
5026 if (status != -EIO)
5027 nfs_increment_lock_seqid(status, res->seqid);
5028 if (status == 0)
5029 status = decode_lock_stateid(xdr, &res->stateid);
5030 return status;
5031 }
5032
5033 static int decode_release_lockowner(struct xdr_stream *xdr)
5034 {
5035 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5036 }
5037
5038 static int decode_lookup(struct xdr_stream *xdr)
5039 {
5040 return decode_op_hdr(xdr, OP_LOOKUP);
5041 }
5042
5043 /* This is too sick! */
5044 static int decode_space_limit(struct xdr_stream *xdr,
5045 unsigned long *pagemod_limit)
5046 {
5047 __be32 *p;
5048 uint32_t limit_type, nblocks, blocksize;
5049 u64 maxsize = 0;
5050
5051 p = xdr_inline_decode(xdr, 12);
5052 if (unlikely(!p))
5053 goto out_overflow;
5054 limit_type = be32_to_cpup(p++);
5055 switch (limit_type) {
5056 case NFS4_LIMIT_SIZE:
5057 xdr_decode_hyper(p, &maxsize);
5058 break;
5059 case NFS4_LIMIT_BLOCKS:
5060 nblocks = be32_to_cpup(p++);
5061 blocksize = be32_to_cpup(p);
5062 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5063 }
5064 maxsize >>= PAGE_SHIFT;
5065 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5066 return 0;
5067 out_overflow:
5068 print_overflow_msg(__func__, xdr);
5069 return -EIO;
5070 }
5071
5072 static int decode_rw_delegation(struct xdr_stream *xdr,
5073 uint32_t delegation_type,
5074 struct nfs_openres *res)
5075 {
5076 __be32 *p;
5077 int status;
5078
5079 status = decode_delegation_stateid(xdr, &res->delegation);
5080 if (unlikely(status))
5081 return status;
5082 p = xdr_inline_decode(xdr, 4);
5083 if (unlikely(!p))
5084 goto out_overflow;
5085 res->do_recall = be32_to_cpup(p);
5086
5087 switch (delegation_type) {
5088 case NFS4_OPEN_DELEGATE_READ:
5089 res->delegation_type = FMODE_READ;
5090 break;
5091 case NFS4_OPEN_DELEGATE_WRITE:
5092 res->delegation_type = FMODE_WRITE|FMODE_READ;
5093 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5094 return -EIO;
5095 }
5096 return decode_ace(xdr, NULL, res->server->nfs_client);
5097 out_overflow:
5098 print_overflow_msg(__func__, xdr);
5099 return -EIO;
5100 }
5101
5102 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5103 {
5104 __be32 *p;
5105 uint32_t why_no_delegation;
5106
5107 p = xdr_inline_decode(xdr, 4);
5108 if (unlikely(!p))
5109 goto out_overflow;
5110 why_no_delegation = be32_to_cpup(p);
5111 switch (why_no_delegation) {
5112 case WND4_CONTENTION:
5113 case WND4_RESOURCE:
5114 xdr_inline_decode(xdr, 4);
5115 /* Ignore for now */
5116 }
5117 return 0;
5118 out_overflow:
5119 print_overflow_msg(__func__, xdr);
5120 return -EIO;
5121 }
5122
5123 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5124 {
5125 __be32 *p;
5126 uint32_t delegation_type;
5127
5128 p = xdr_inline_decode(xdr, 4);
5129 if (unlikely(!p))
5130 goto out_overflow;
5131 delegation_type = be32_to_cpup(p);
5132 res->delegation_type = 0;
5133 switch (delegation_type) {
5134 case NFS4_OPEN_DELEGATE_NONE:
5135 return 0;
5136 case NFS4_OPEN_DELEGATE_READ:
5137 case NFS4_OPEN_DELEGATE_WRITE:
5138 return decode_rw_delegation(xdr, delegation_type, res);
5139 case NFS4_OPEN_DELEGATE_NONE_EXT:
5140 return decode_no_delegation(xdr, res);
5141 }
5142 return -EIO;
5143 out_overflow:
5144 print_overflow_msg(__func__, xdr);
5145 return -EIO;
5146 }
5147
5148 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5149 {
5150 __be32 *p;
5151 uint32_t savewords, bmlen, i;
5152 int status;
5153
5154 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5155 return status;
5156 nfs_increment_open_seqid(status, res->seqid);
5157 if (status)
5158 return status;
5159 status = decode_open_stateid(xdr, &res->stateid);
5160 if (unlikely(status))
5161 return status;
5162
5163 decode_change_info(xdr, &res->cinfo);
5164
5165 p = xdr_inline_decode(xdr, 8);
5166 if (unlikely(!p))
5167 goto out_overflow;
5168 res->rflags = be32_to_cpup(p++);
5169 bmlen = be32_to_cpup(p);
5170 if (bmlen > 10)
5171 goto xdr_error;
5172
5173 p = xdr_inline_decode(xdr, bmlen << 2);
5174 if (unlikely(!p))
5175 goto out_overflow;
5176 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5177 for (i = 0; i < savewords; ++i)
5178 res->attrset[i] = be32_to_cpup(p++);
5179 for (; i < NFS4_BITMAP_SIZE; i++)
5180 res->attrset[i] = 0;
5181
5182 return decode_delegation(xdr, res);
5183 xdr_error:
5184 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5185 return -EIO;
5186 out_overflow:
5187 print_overflow_msg(__func__, xdr);
5188 return -EIO;
5189 }
5190
5191 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5192 {
5193 int status;
5194
5195 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5196 if (status != -EIO)
5197 nfs_increment_open_seqid(status, res->seqid);
5198 if (!status)
5199 status = decode_open_stateid(xdr, &res->stateid);
5200 return status;
5201 }
5202
5203 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5204 {
5205 int status;
5206
5207 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5208 if (status != -EIO)
5209 nfs_increment_open_seqid(status, res->seqid);
5210 if (!status)
5211 status = decode_open_stateid(xdr, &res->stateid);
5212 return status;
5213 }
5214
5215 static int decode_putfh(struct xdr_stream *xdr)
5216 {
5217 return decode_op_hdr(xdr, OP_PUTFH);
5218 }
5219
5220 static int decode_putrootfh(struct xdr_stream *xdr)
5221 {
5222 return decode_op_hdr(xdr, OP_PUTROOTFH);
5223 }
5224
5225 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5226 struct nfs_pgio_res *res)
5227 {
5228 __be32 *p;
5229 uint32_t count, eof, recvd;
5230 int status;
5231
5232 status = decode_op_hdr(xdr, OP_READ);
5233 if (status)
5234 return status;
5235 p = xdr_inline_decode(xdr, 8);
5236 if (unlikely(!p))
5237 goto out_overflow;
5238 eof = be32_to_cpup(p++);
5239 count = be32_to_cpup(p);
5240 recvd = xdr_read_pages(xdr, count);
5241 if (count > recvd) {
5242 dprintk("NFS: server cheating in read reply: "
5243 "count %u > recvd %u\n", count, recvd);
5244 count = recvd;
5245 eof = 0;
5246 }
5247 res->eof = eof;
5248 res->count = count;
5249 return 0;
5250 out_overflow:
5251 print_overflow_msg(__func__, xdr);
5252 return -EIO;
5253 }
5254
5255 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5256 {
5257 int status;
5258 __be32 verf[2];
5259
5260 status = decode_op_hdr(xdr, OP_READDIR);
5261 if (!status)
5262 status = decode_verifier(xdr, readdir->verifier.data);
5263 if (unlikely(status))
5264 return status;
5265 memcpy(verf, readdir->verifier.data, sizeof(verf));
5266 dprintk("%s: verifier = %08x:%08x\n",
5267 __func__, verf[0], verf[1]);
5268 return xdr_read_pages(xdr, xdr->buf->page_len);
5269 }
5270
5271 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5272 {
5273 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5274 u32 len, recvd;
5275 __be32 *p;
5276 int status;
5277
5278 status = decode_op_hdr(xdr, OP_READLINK);
5279 if (status)
5280 return status;
5281
5282 /* Convert length of symlink */
5283 p = xdr_inline_decode(xdr, 4);
5284 if (unlikely(!p))
5285 goto out_overflow;
5286 len = be32_to_cpup(p);
5287 if (len >= rcvbuf->page_len || len <= 0) {
5288 dprintk("nfs: server returned giant symlink!\n");
5289 return -ENAMETOOLONG;
5290 }
5291 recvd = xdr_read_pages(xdr, len);
5292 if (recvd < len) {
5293 dprintk("NFS: server cheating in readlink reply: "
5294 "count %u > recvd %u\n", len, recvd);
5295 return -EIO;
5296 }
5297 /*
5298 * The XDR encode routine has set things up so that
5299 * the link text will be copied directly into the
5300 * buffer. We just have to do overflow-checking,
5301 * and and null-terminate the text (the VFS expects
5302 * null-termination).
5303 */
5304 xdr_terminate_string(rcvbuf, len);
5305 return 0;
5306 out_overflow:
5307 print_overflow_msg(__func__, xdr);
5308 return -EIO;
5309 }
5310
5311 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5312 {
5313 int status;
5314
5315 status = decode_op_hdr(xdr, OP_REMOVE);
5316 if (status)
5317 goto out;
5318 status = decode_change_info(xdr, cinfo);
5319 out:
5320 return status;
5321 }
5322
5323 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5324 struct nfs4_change_info *new_cinfo)
5325 {
5326 int status;
5327
5328 status = decode_op_hdr(xdr, OP_RENAME);
5329 if (status)
5330 goto out;
5331 if ((status = decode_change_info(xdr, old_cinfo)))
5332 goto out;
5333 status = decode_change_info(xdr, new_cinfo);
5334 out:
5335 return status;
5336 }
5337
5338 static int decode_renew(struct xdr_stream *xdr)
5339 {
5340 return decode_op_hdr(xdr, OP_RENEW);
5341 }
5342
5343 static int
5344 decode_restorefh(struct xdr_stream *xdr)
5345 {
5346 return decode_op_hdr(xdr, OP_RESTOREFH);
5347 }
5348
5349 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5350 struct nfs_getaclres *res)
5351 {
5352 unsigned int savep;
5353 uint32_t attrlen,
5354 bitmap[3] = {0};
5355 int status;
5356 unsigned int pg_offset;
5357
5358 res->acl_len = 0;
5359 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5360 goto out;
5361
5362 xdr_enter_page(xdr, xdr->buf->page_len);
5363
5364 /* Calculate the offset of the page data */
5365 pg_offset = xdr->buf->head[0].iov_len;
5366
5367 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5368 goto out;
5369 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5370 goto out;
5371
5372 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5373 return -EIO;
5374 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5375
5376 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5377 * are stored with the acl data to handle the problem of
5378 * variable length bitmaps.*/
5379 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5380 res->acl_len = attrlen;
5381
5382 /* Check for receive buffer overflow */
5383 if (res->acl_len > (xdr->nwords << 2) ||
5384 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5385 res->acl_flags |= NFS4_ACL_TRUNC;
5386 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5387 attrlen, xdr->nwords << 2);
5388 }
5389 } else
5390 status = -EOPNOTSUPP;
5391
5392 out:
5393 return status;
5394 }
5395
5396 static int
5397 decode_savefh(struct xdr_stream *xdr)
5398 {
5399 return decode_op_hdr(xdr, OP_SAVEFH);
5400 }
5401
5402 static int decode_setattr(struct xdr_stream *xdr)
5403 {
5404 __be32 *p;
5405 uint32_t bmlen;
5406 int status;
5407
5408 status = decode_op_hdr(xdr, OP_SETATTR);
5409 if (status)
5410 return status;
5411 p = xdr_inline_decode(xdr, 4);
5412 if (unlikely(!p))
5413 goto out_overflow;
5414 bmlen = be32_to_cpup(p);
5415 p = xdr_inline_decode(xdr, bmlen << 2);
5416 if (likely(p))
5417 return 0;
5418 out_overflow:
5419 print_overflow_msg(__func__, xdr);
5420 return -EIO;
5421 }
5422
5423 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5424 {
5425 __be32 *p;
5426 uint32_t opnum;
5427 int32_t nfserr;
5428
5429 p = xdr_inline_decode(xdr, 8);
5430 if (unlikely(!p))
5431 goto out_overflow;
5432 opnum = be32_to_cpup(p++);
5433 if (opnum != OP_SETCLIENTID) {
5434 dprintk("nfs: decode_setclientid: Server returned operation"
5435 " %d\n", opnum);
5436 return -EIO;
5437 }
5438 nfserr = be32_to_cpup(p);
5439 if (nfserr == NFS_OK) {
5440 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5441 if (unlikely(!p))
5442 goto out_overflow;
5443 p = xdr_decode_hyper(p, &res->clientid);
5444 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5445 } else if (nfserr == NFSERR_CLID_INUSE) {
5446 uint32_t len;
5447
5448 /* skip netid string */
5449 p = xdr_inline_decode(xdr, 4);
5450 if (unlikely(!p))
5451 goto out_overflow;
5452 len = be32_to_cpup(p);
5453 p = xdr_inline_decode(xdr, len);
5454 if (unlikely(!p))
5455 goto out_overflow;
5456
5457 /* skip uaddr string */
5458 p = xdr_inline_decode(xdr, 4);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 len = be32_to_cpup(p);
5462 p = xdr_inline_decode(xdr, len);
5463 if (unlikely(!p))
5464 goto out_overflow;
5465 return -NFSERR_CLID_INUSE;
5466 } else
5467 return nfs4_stat_to_errno(nfserr);
5468
5469 return 0;
5470 out_overflow:
5471 print_overflow_msg(__func__, xdr);
5472 return -EIO;
5473 }
5474
5475 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5476 {
5477 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5478 }
5479
5480 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5481 {
5482 __be32 *p;
5483 int status;
5484
5485 status = decode_op_hdr(xdr, OP_WRITE);
5486 if (status)
5487 return status;
5488
5489 p = xdr_inline_decode(xdr, 8);
5490 if (unlikely(!p))
5491 goto out_overflow;
5492 res->count = be32_to_cpup(p++);
5493 res->verf->committed = be32_to_cpup(p++);
5494 return decode_write_verifier(xdr, &res->verf->verifier);
5495 out_overflow:
5496 print_overflow_msg(__func__, xdr);
5497 return -EIO;
5498 }
5499
5500 static int decode_delegreturn(struct xdr_stream *xdr)
5501 {
5502 return decode_op_hdr(xdr, OP_DELEGRETURN);
5503 }
5504
5505 static int decode_secinfo_gss(struct xdr_stream *xdr,
5506 struct nfs4_secinfo4 *flavor)
5507 {
5508 u32 oid_len;
5509 __be32 *p;
5510
5511 p = xdr_inline_decode(xdr, 4);
5512 if (unlikely(!p))
5513 goto out_overflow;
5514 oid_len = be32_to_cpup(p);
5515 if (oid_len > GSS_OID_MAX_LEN)
5516 goto out_err;
5517
5518 p = xdr_inline_decode(xdr, oid_len);
5519 if (unlikely(!p))
5520 goto out_overflow;
5521 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5522 flavor->flavor_info.oid.len = oid_len;
5523
5524 p = xdr_inline_decode(xdr, 8);
5525 if (unlikely(!p))
5526 goto out_overflow;
5527 flavor->flavor_info.qop = be32_to_cpup(p++);
5528 flavor->flavor_info.service = be32_to_cpup(p);
5529
5530 return 0;
5531
5532 out_overflow:
5533 print_overflow_msg(__func__, xdr);
5534 return -EIO;
5535 out_err:
5536 return -EINVAL;
5537 }
5538
5539 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5540 {
5541 struct nfs4_secinfo4 *sec_flavor;
5542 unsigned int i, num_flavors;
5543 int status;
5544 __be32 *p;
5545
5546 p = xdr_inline_decode(xdr, 4);
5547 if (unlikely(!p))
5548 goto out_overflow;
5549
5550 res->flavors->num_flavors = 0;
5551 num_flavors = be32_to_cpup(p);
5552
5553 for (i = 0; i < num_flavors; i++) {
5554 sec_flavor = &res->flavors->flavors[i];
5555 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5556 break;
5557
5558 p = xdr_inline_decode(xdr, 4);
5559 if (unlikely(!p))
5560 goto out_overflow;
5561 sec_flavor->flavor = be32_to_cpup(p);
5562
5563 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5564 status = decode_secinfo_gss(xdr, sec_flavor);
5565 if (status)
5566 goto out;
5567 }
5568 res->flavors->num_flavors++;
5569 }
5570
5571 status = 0;
5572 out:
5573 return status;
5574 out_overflow:
5575 print_overflow_msg(__func__, xdr);
5576 return -EIO;
5577 }
5578
5579 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5580 {
5581 int status = decode_op_hdr(xdr, OP_SECINFO);
5582 if (status)
5583 return status;
5584 return decode_secinfo_common(xdr, res);
5585 }
5586
5587 #if defined(CONFIG_NFS_V4_1)
5588 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5589 {
5590 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5591 if (status)
5592 return status;
5593 return decode_secinfo_common(xdr, res);
5594 }
5595
5596 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5597 {
5598 __be32 *p;
5599 uint32_t bitmap_words;
5600 unsigned int i;
5601
5602 p = xdr_inline_decode(xdr, 4);
5603 bitmap_words = be32_to_cpup(p++);
5604 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5605 return -EIO;
5606 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5607 for (i = 0; i < bitmap_words; i++)
5608 op_map->u.words[i] = be32_to_cpup(p++);
5609
5610 return 0;
5611 }
5612
5613 static int decode_exchange_id(struct xdr_stream *xdr,
5614 struct nfs41_exchange_id_res *res)
5615 {
5616 __be32 *p;
5617 uint32_t dummy;
5618 char *dummy_str;
5619 int status;
5620 uint32_t impl_id_count;
5621
5622 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5623 if (status)
5624 return status;
5625
5626 p = xdr_inline_decode(xdr, 8);
5627 if (unlikely(!p))
5628 goto out_overflow;
5629 xdr_decode_hyper(p, &res->clientid);
5630 p = xdr_inline_decode(xdr, 12);
5631 if (unlikely(!p))
5632 goto out_overflow;
5633 res->seqid = be32_to_cpup(p++);
5634 res->flags = be32_to_cpup(p++);
5635
5636 res->state_protect.how = be32_to_cpup(p);
5637 switch (res->state_protect.how) {
5638 case SP4_NONE:
5639 break;
5640 case SP4_MACH_CRED:
5641 status = decode_op_map(xdr, &res->state_protect.enforce);
5642 if (status)
5643 return status;
5644 status = decode_op_map(xdr, &res->state_protect.allow);
5645 if (status)
5646 return status;
5647 break;
5648 default:
5649 WARN_ON_ONCE(1);
5650 return -EIO;
5651 }
5652
5653 /* server_owner4.so_minor_id */
5654 p = xdr_inline_decode(xdr, 8);
5655 if (unlikely(!p))
5656 goto out_overflow;
5657 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5658
5659 /* server_owner4.so_major_id */
5660 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661 if (unlikely(status))
5662 return status;
5663 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5664 return -EIO;
5665 memcpy(res->server_owner->major_id, dummy_str, dummy);
5666 res->server_owner->major_id_sz = dummy;
5667
5668 /* server_scope4 */
5669 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5670 if (unlikely(status))
5671 return status;
5672 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5673 return -EIO;
5674 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5675 res->server_scope->server_scope_sz = dummy;
5676
5677 /* Implementation Id */
5678 p = xdr_inline_decode(xdr, 4);
5679 if (unlikely(!p))
5680 goto out_overflow;
5681 impl_id_count = be32_to_cpup(p++);
5682
5683 if (impl_id_count) {
5684 /* nii_domain */
5685 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5686 if (unlikely(status))
5687 return status;
5688 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5689 return -EIO;
5690 memcpy(res->impl_id->domain, dummy_str, dummy);
5691
5692 /* nii_name */
5693 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5694 if (unlikely(status))
5695 return status;
5696 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5697 return -EIO;
5698 memcpy(res->impl_id->name, dummy_str, dummy);
5699
5700 /* nii_date */
5701 p = xdr_inline_decode(xdr, 12);
5702 if (unlikely(!p))
5703 goto out_overflow;
5704 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5705 res->impl_id->date.nseconds = be32_to_cpup(p);
5706
5707 /* if there's more than one entry, ignore the rest */
5708 }
5709 return 0;
5710 out_overflow:
5711 print_overflow_msg(__func__, xdr);
5712 return -EIO;
5713 }
5714
5715 static int decode_chan_attrs(struct xdr_stream *xdr,
5716 struct nfs4_channel_attrs *attrs)
5717 {
5718 __be32 *p;
5719 u32 nr_attrs, val;
5720
5721 p = xdr_inline_decode(xdr, 28);
5722 if (unlikely(!p))
5723 goto out_overflow;
5724 val = be32_to_cpup(p++); /* headerpadsz */
5725 if (val)
5726 return -EINVAL; /* no support for header padding yet */
5727 attrs->max_rqst_sz = be32_to_cpup(p++);
5728 attrs->max_resp_sz = be32_to_cpup(p++);
5729 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5730 attrs->max_ops = be32_to_cpup(p++);
5731 attrs->max_reqs = be32_to_cpup(p++);
5732 nr_attrs = be32_to_cpup(p);
5733 if (unlikely(nr_attrs > 1)) {
5734 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5735 "count %u\n", __func__, nr_attrs);
5736 return -EINVAL;
5737 }
5738 if (nr_attrs == 1) {
5739 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5740 if (unlikely(!p))
5741 goto out_overflow;
5742 }
5743 return 0;
5744 out_overflow:
5745 print_overflow_msg(__func__, xdr);
5746 return -EIO;
5747 }
5748
5749 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5750 {
5751 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5752 }
5753
5754 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5755 struct nfs41_bind_conn_to_session_res *res)
5756 {
5757 __be32 *p;
5758 int status;
5759
5760 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5761 if (!status)
5762 status = decode_sessionid(xdr, &res->sessionid);
5763 if (unlikely(status))
5764 return status;
5765
5766 /* dir flags, rdma mode bool */
5767 p = xdr_inline_decode(xdr, 8);
5768 if (unlikely(!p))
5769 goto out_overflow;
5770
5771 res->dir = be32_to_cpup(p++);
5772 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5773 return -EIO;
5774 if (be32_to_cpup(p) == 0)
5775 res->use_conn_in_rdma_mode = false;
5776 else
5777 res->use_conn_in_rdma_mode = true;
5778
5779 return 0;
5780 out_overflow:
5781 print_overflow_msg(__func__, xdr);
5782 return -EIO;
5783 }
5784
5785 static int decode_create_session(struct xdr_stream *xdr,
5786 struct nfs41_create_session_res *res)
5787 {
5788 __be32 *p;
5789 int status;
5790
5791 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5792 if (!status)
5793 status = decode_sessionid(xdr, &res->sessionid);
5794 if (unlikely(status))
5795 return status;
5796
5797 /* seqid, flags */
5798 p = xdr_inline_decode(xdr, 8);
5799 if (unlikely(!p))
5800 goto out_overflow;
5801 res->seqid = be32_to_cpup(p++);
5802 res->flags = be32_to_cpup(p);
5803
5804 /* Channel attributes */
5805 status = decode_chan_attrs(xdr, &res->fc_attrs);
5806 if (!status)
5807 status = decode_chan_attrs(xdr, &res->bc_attrs);
5808 return status;
5809 out_overflow:
5810 print_overflow_msg(__func__, xdr);
5811 return -EIO;
5812 }
5813
5814 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5815 {
5816 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5817 }
5818
5819 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5820 {
5821 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5822 }
5823
5824 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5825 {
5826 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5827 }
5828 #endif /* CONFIG_NFS_V4_1 */
5829
5830 static int decode_sequence(struct xdr_stream *xdr,
5831 struct nfs4_sequence_res *res,
5832 struct rpc_rqst *rqstp)
5833 {
5834 #if defined(CONFIG_NFS_V4_1)
5835 struct nfs4_session *session;
5836 struct nfs4_sessionid id;
5837 u32 dummy;
5838 int status;
5839 __be32 *p;
5840
5841 if (res->sr_slot == NULL)
5842 return 0;
5843 if (!res->sr_slot->table->session)
5844 return 0;
5845
5846 status = decode_op_hdr(xdr, OP_SEQUENCE);
5847 if (!status)
5848 status = decode_sessionid(xdr, &id);
5849 if (unlikely(status))
5850 goto out_err;
5851
5852 /*
5853 * If the server returns different values for sessionID, slotID or
5854 * sequence number, the server is looney tunes.
5855 */
5856 status = -EREMOTEIO;
5857 session = res->sr_slot->table->session;
5858
5859 if (memcmp(id.data, session->sess_id.data,
5860 NFS4_MAX_SESSIONID_LEN)) {
5861 dprintk("%s Invalid session id\n", __func__);
5862 goto out_err;
5863 }
5864
5865 p = xdr_inline_decode(xdr, 20);
5866 if (unlikely(!p))
5867 goto out_overflow;
5868
5869 /* seqid */
5870 dummy = be32_to_cpup(p++);
5871 if (dummy != res->sr_slot->seq_nr) {
5872 dprintk("%s Invalid sequence number\n", __func__);
5873 goto out_err;
5874 }
5875 /* slot id */
5876 dummy = be32_to_cpup(p++);
5877 if (dummy != res->sr_slot->slot_nr) {
5878 dprintk("%s Invalid slot id\n", __func__);
5879 goto out_err;
5880 }
5881 /* highest slot id */
5882 res->sr_highest_slotid = be32_to_cpup(p++);
5883 /* target highest slot id */
5884 res->sr_target_highest_slotid = be32_to_cpup(p++);
5885 /* result flags */
5886 res->sr_status_flags = be32_to_cpup(p);
5887 status = 0;
5888 out_err:
5889 res->sr_status = status;
5890 return status;
5891 out_overflow:
5892 print_overflow_msg(__func__, xdr);
5893 status = -EIO;
5894 goto out_err;
5895 #else /* CONFIG_NFS_V4_1 */
5896 return 0;
5897 #endif /* CONFIG_NFS_V4_1 */
5898 }
5899
5900 #if defined(CONFIG_NFS_V4_1)
5901 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5902 {
5903 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5904 return decode_stateid(xdr, stateid);
5905 }
5906
5907 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5908 struct nfs4_getdeviceinfo_res *res)
5909 {
5910 struct pnfs_device *pdev = res->pdev;
5911 __be32 *p;
5912 uint32_t len, type;
5913 int status;
5914
5915 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5916 if (status) {
5917 if (status == -ETOOSMALL) {
5918 p = xdr_inline_decode(xdr, 4);
5919 if (unlikely(!p))
5920 goto out_overflow;
5921 pdev->mincount = be32_to_cpup(p);
5922 dprintk("%s: Min count too small. mincnt = %u\n",
5923 __func__, pdev->mincount);
5924 }
5925 return status;
5926 }
5927
5928 p = xdr_inline_decode(xdr, 8);
5929 if (unlikely(!p))
5930 goto out_overflow;
5931 type = be32_to_cpup(p++);
5932 if (type != pdev->layout_type) {
5933 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5934 __func__, pdev->layout_type, type);
5935 return -EINVAL;
5936 }
5937 /*
5938 * Get the length of the opaque device_addr4. xdr_read_pages places
5939 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5940 * and places the remaining xdr data in xdr_buf->tail
5941 */
5942 pdev->mincount = be32_to_cpup(p);
5943 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5944 goto out_overflow;
5945
5946 /* Parse notification bitmap, verifying that it is zero. */
5947 p = xdr_inline_decode(xdr, 4);
5948 if (unlikely(!p))
5949 goto out_overflow;
5950 len = be32_to_cpup(p);
5951 if (len) {
5952 uint32_t i;
5953
5954 p = xdr_inline_decode(xdr, 4 * len);
5955 if (unlikely(!p))
5956 goto out_overflow;
5957
5958 res->notification = be32_to_cpup(p++);
5959 for (i = 1; i < len; i++) {
5960 if (be32_to_cpup(p++)) {
5961 dprintk("%s: unsupported notification\n",
5962 __func__);
5963 return -EIO;
5964 }
5965 }
5966 }
5967 return 0;
5968 out_overflow:
5969 print_overflow_msg(__func__, xdr);
5970 return -EIO;
5971 }
5972
5973 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5974 struct nfs4_layoutget_res *res)
5975 {
5976 __be32 *p;
5977 int status;
5978 u32 layout_count;
5979 u32 recvd;
5980
5981 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5982 if (status)
5983 return status;
5984 p = xdr_inline_decode(xdr, 4);
5985 if (unlikely(!p))
5986 goto out_overflow;
5987 res->return_on_close = be32_to_cpup(p);
5988 decode_layout_stateid(xdr, &res->stateid);
5989 p = xdr_inline_decode(xdr, 4);
5990 if (unlikely(!p))
5991 goto out_overflow;
5992 layout_count = be32_to_cpup(p);
5993 if (!layout_count) {
5994 dprintk("%s: server responded with empty layout array\n",
5995 __func__);
5996 return -EINVAL;
5997 }
5998
5999 p = xdr_inline_decode(xdr, 28);
6000 if (unlikely(!p))
6001 goto out_overflow;
6002 p = xdr_decode_hyper(p, &res->range.offset);
6003 p = xdr_decode_hyper(p, &res->range.length);
6004 res->range.iomode = be32_to_cpup(p++);
6005 res->type = be32_to_cpup(p++);
6006 res->layoutp->len = be32_to_cpup(p);
6007
6008 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6009 __func__,
6010 (unsigned long)res->range.offset,
6011 (unsigned long)res->range.length,
6012 res->range.iomode,
6013 res->type,
6014 res->layoutp->len);
6015
6016 recvd = xdr_read_pages(xdr, res->layoutp->len);
6017 if (res->layoutp->len > recvd) {
6018 dprintk("NFS: server cheating in layoutget reply: "
6019 "layout len %u > recvd %u\n",
6020 res->layoutp->len, recvd);
6021 return -EINVAL;
6022 }
6023
6024 if (layout_count > 1) {
6025 /* We only handle a length one array at the moment. Any
6026 * further entries are just ignored. Note that this means
6027 * the client may see a response that is less than the
6028 * minimum it requested.
6029 */
6030 dprintk("%s: server responded with %d layouts, dropping tail\n",
6031 __func__, layout_count);
6032 }
6033
6034 return 0;
6035 out_overflow:
6036 print_overflow_msg(__func__, xdr);
6037 return -EIO;
6038 }
6039
6040 static int decode_layoutreturn(struct xdr_stream *xdr,
6041 struct nfs4_layoutreturn_res *res)
6042 {
6043 __be32 *p;
6044 int status;
6045
6046 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6047 if (status)
6048 return status;
6049 p = xdr_inline_decode(xdr, 4);
6050 if (unlikely(!p))
6051 goto out_overflow;
6052 res->lrs_present = be32_to_cpup(p);
6053 if (res->lrs_present)
6054 status = decode_layout_stateid(xdr, &res->stateid);
6055 return status;
6056 out_overflow:
6057 print_overflow_msg(__func__, xdr);
6058 return -EIO;
6059 }
6060
6061 static int decode_layoutcommit(struct xdr_stream *xdr,
6062 struct rpc_rqst *req,
6063 struct nfs4_layoutcommit_res *res)
6064 {
6065 __be32 *p;
6066 __u32 sizechanged;
6067 int status;
6068
6069 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6070 res->status = status;
6071 if (status)
6072 return status;
6073
6074 p = xdr_inline_decode(xdr, 4);
6075 if (unlikely(!p))
6076 goto out_overflow;
6077 sizechanged = be32_to_cpup(p);
6078
6079 if (sizechanged) {
6080 /* throw away new size */
6081 p = xdr_inline_decode(xdr, 8);
6082 if (unlikely(!p))
6083 goto out_overflow;
6084 }
6085 return 0;
6086 out_overflow:
6087 print_overflow_msg(__func__, xdr);
6088 return -EIO;
6089 }
6090
6091 static int decode_test_stateid(struct xdr_stream *xdr,
6092 struct nfs41_test_stateid_res *res)
6093 {
6094 __be32 *p;
6095 int status;
6096 int num_res;
6097
6098 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6099 if (status)
6100 return status;
6101
6102 p = xdr_inline_decode(xdr, 4);
6103 if (unlikely(!p))
6104 goto out_overflow;
6105 num_res = be32_to_cpup(p++);
6106 if (num_res != 1)
6107 goto out;
6108
6109 p = xdr_inline_decode(xdr, 4);
6110 if (unlikely(!p))
6111 goto out_overflow;
6112 res->status = be32_to_cpup(p++);
6113
6114 return status;
6115 out_overflow:
6116 print_overflow_msg(__func__, xdr);
6117 out:
6118 return -EIO;
6119 }
6120
6121 static int decode_free_stateid(struct xdr_stream *xdr,
6122 struct nfs41_free_stateid_res *res)
6123 {
6124 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6125 return res->status;
6126 }
6127 #else
6128 static inline
6129 int decode_layoutreturn(struct xdr_stream *xdr,
6130 struct nfs4_layoutreturn_res *res)
6131 {
6132 return 0;
6133 }
6134 #endif /* CONFIG_NFS_V4_1 */
6135
6136 /*
6137 * END OF "GENERIC" DECODE ROUTINES.
6138 */
6139
6140 /*
6141 * Decode OPEN_DOWNGRADE response
6142 */
6143 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6144 struct xdr_stream *xdr,
6145 struct nfs_closeres *res)
6146 {
6147 struct compound_hdr hdr;
6148 int status;
6149
6150 status = decode_compound_hdr(xdr, &hdr);
6151 if (status)
6152 goto out;
6153 status = decode_sequence(xdr, &res->seq_res, rqstp);
6154 if (status)
6155 goto out;
6156 status = decode_putfh(xdr);
6157 if (status)
6158 goto out;
6159 if (res->lr_res) {
6160 status = decode_layoutreturn(xdr, res->lr_res);
6161 res->lr_ret = status;
6162 if (status)
6163 goto out;
6164 }
6165 status = decode_open_downgrade(xdr, res);
6166 out:
6167 return status;
6168 }
6169
6170 /*
6171 * Decode ACCESS response
6172 */
6173 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174 struct nfs4_accessres *res)
6175 {
6176 struct compound_hdr hdr;
6177 int status;
6178
6179 status = decode_compound_hdr(xdr, &hdr);
6180 if (status)
6181 goto out;
6182 status = decode_sequence(xdr, &res->seq_res, rqstp);
6183 if (status)
6184 goto out;
6185 status = decode_putfh(xdr);
6186 if (status != 0)
6187 goto out;
6188 status = decode_access(xdr, &res->supported, &res->access);
6189 if (status != 0)
6190 goto out;
6191 decode_getfattr(xdr, res->fattr, res->server);
6192 out:
6193 return status;
6194 }
6195
6196 /*
6197 * Decode LOOKUP response
6198 */
6199 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6200 struct nfs4_lookup_res *res)
6201 {
6202 struct compound_hdr hdr;
6203 int status;
6204
6205 status = decode_compound_hdr(xdr, &hdr);
6206 if (status)
6207 goto out;
6208 status = decode_sequence(xdr, &res->seq_res, rqstp);
6209 if (status)
6210 goto out;
6211 status = decode_putfh(xdr);
6212 if (status)
6213 goto out;
6214 status = decode_lookup(xdr);
6215 if (status)
6216 goto out;
6217 status = decode_getfh(xdr, res->fh);
6218 if (status)
6219 goto out;
6220 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6221 out:
6222 return status;
6223 }
6224
6225 /*
6226 * Decode LOOKUP_ROOT response
6227 */
6228 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6229 struct xdr_stream *xdr,
6230 struct nfs4_lookup_res *res)
6231 {
6232 struct compound_hdr hdr;
6233 int status;
6234
6235 status = decode_compound_hdr(xdr, &hdr);
6236 if (status)
6237 goto out;
6238 status = decode_sequence(xdr, &res->seq_res, rqstp);
6239 if (status)
6240 goto out;
6241 status = decode_putrootfh(xdr);
6242 if (status)
6243 goto out;
6244 status = decode_getfh(xdr, res->fh);
6245 if (status == 0)
6246 status = decode_getfattr_label(xdr, res->fattr,
6247 res->label, res->server);
6248 out:
6249 return status;
6250 }
6251
6252 /*
6253 * Decode REMOVE response
6254 */
6255 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256 struct nfs_removeres *res)
6257 {
6258 struct compound_hdr hdr;
6259 int status;
6260
6261 status = decode_compound_hdr(xdr, &hdr);
6262 if (status)
6263 goto out;
6264 status = decode_sequence(xdr, &res->seq_res, rqstp);
6265 if (status)
6266 goto out;
6267 status = decode_putfh(xdr);
6268 if (status)
6269 goto out;
6270 status = decode_remove(xdr, &res->cinfo);
6271 out:
6272 return status;
6273 }
6274
6275 /*
6276 * Decode RENAME response
6277 */
6278 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279 struct nfs_renameres *res)
6280 {
6281 struct compound_hdr hdr;
6282 int status;
6283
6284 status = decode_compound_hdr(xdr, &hdr);
6285 if (status)
6286 goto out;
6287 status = decode_sequence(xdr, &res->seq_res, rqstp);
6288 if (status)
6289 goto out;
6290 status = decode_putfh(xdr);
6291 if (status)
6292 goto out;
6293 status = decode_savefh(xdr);
6294 if (status)
6295 goto out;
6296 status = decode_putfh(xdr);
6297 if (status)
6298 goto out;
6299 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6300 out:
6301 return status;
6302 }
6303
6304 /*
6305 * Decode LINK response
6306 */
6307 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6308 struct nfs4_link_res *res)
6309 {
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_savefh(xdr);
6323 if (status)
6324 goto out;
6325 status = decode_putfh(xdr);
6326 if (status)
6327 goto out;
6328 status = decode_link(xdr, &res->cinfo);
6329 if (status)
6330 goto out;
6331 /*
6332 * Note order: OP_LINK leaves the directory as the current
6333 * filehandle.
6334 */
6335 status = decode_restorefh(xdr);
6336 if (status)
6337 goto out;
6338 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6339 out:
6340 return status;
6341 }
6342
6343 /*
6344 * Decode CREATE response
6345 */
6346 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347 struct nfs4_create_res *res)
6348 {
6349 struct compound_hdr hdr;
6350 int status;
6351
6352 status = decode_compound_hdr(xdr, &hdr);
6353 if (status)
6354 goto out;
6355 status = decode_sequence(xdr, &res->seq_res, rqstp);
6356 if (status)
6357 goto out;
6358 status = decode_putfh(xdr);
6359 if (status)
6360 goto out;
6361 status = decode_create(xdr, &res->dir_cinfo);
6362 if (status)
6363 goto out;
6364 status = decode_getfh(xdr, res->fh);
6365 if (status)
6366 goto out;
6367 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6368 out:
6369 return status;
6370 }
6371
6372 /*
6373 * Decode SYMLINK response
6374 */
6375 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6376 struct nfs4_create_res *res)
6377 {
6378 return nfs4_xdr_dec_create(rqstp, xdr, res);
6379 }
6380
6381 /*
6382 * Decode GETATTR response
6383 */
6384 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385 struct nfs4_getattr_res *res)
6386 {
6387 struct compound_hdr hdr;
6388 int status;
6389
6390 status = decode_compound_hdr(xdr, &hdr);
6391 if (status)
6392 goto out;
6393 status = decode_sequence(xdr, &res->seq_res, rqstp);
6394 if (status)
6395 goto out;
6396 status = decode_putfh(xdr);
6397 if (status)
6398 goto out;
6399 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6400 out:
6401 return status;
6402 }
6403
6404 /*
6405 * Encode an SETACL request
6406 */
6407 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6408 struct nfs_setaclargs *args)
6409 {
6410 struct compound_hdr hdr = {
6411 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6412 };
6413
6414 encode_compound_hdr(xdr, req, &hdr);
6415 encode_sequence(xdr, &args->seq_args, &hdr);
6416 encode_putfh(xdr, args->fh, &hdr);
6417 encode_setacl(xdr, args, &hdr);
6418 encode_nops(&hdr);
6419 }
6420
6421 /*
6422 * Decode SETACL response
6423 */
6424 static int
6425 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6426 struct nfs_setaclres *res)
6427 {
6428 struct compound_hdr hdr;
6429 int status;
6430
6431 status = decode_compound_hdr(xdr, &hdr);
6432 if (status)
6433 goto out;
6434 status = decode_sequence(xdr, &res->seq_res, rqstp);
6435 if (status)
6436 goto out;
6437 status = decode_putfh(xdr);
6438 if (status)
6439 goto out;
6440 status = decode_setattr(xdr);
6441 out:
6442 return status;
6443 }
6444
6445 /*
6446 * Decode GETACL response
6447 */
6448 static int
6449 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450 struct nfs_getaclres *res)
6451 {
6452 struct compound_hdr hdr;
6453 int status;
6454
6455 if (res->acl_scratch != NULL) {
6456 void *p = page_address(res->acl_scratch);
6457 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6458 }
6459 status = decode_compound_hdr(xdr, &hdr);
6460 if (status)
6461 goto out;
6462 status = decode_sequence(xdr, &res->seq_res, rqstp);
6463 if (status)
6464 goto out;
6465 status = decode_putfh(xdr);
6466 if (status)
6467 goto out;
6468 status = decode_getacl(xdr, rqstp, res);
6469
6470 out:
6471 return status;
6472 }
6473
6474 /*
6475 * Decode CLOSE response
6476 */
6477 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6478 struct nfs_closeres *res)
6479 {
6480 struct compound_hdr hdr;
6481 int status;
6482
6483 status = decode_compound_hdr(xdr, &hdr);
6484 if (status)
6485 goto out;
6486 status = decode_sequence(xdr, &res->seq_res, rqstp);
6487 if (status)
6488 goto out;
6489 status = decode_putfh(xdr);
6490 if (status)
6491 goto out;
6492 if (res->lr_res) {
6493 status = decode_layoutreturn(xdr, res->lr_res);
6494 res->lr_ret = status;
6495 if (status)
6496 goto out;
6497 }
6498 if (res->fattr != NULL) {
6499 status = decode_getfattr(xdr, res->fattr, res->server);
6500 if (status != 0)
6501 goto out;
6502 }
6503 status = decode_close(xdr, res);
6504 out:
6505 return status;
6506 }
6507
6508 /*
6509 * Decode OPEN response
6510 */
6511 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512 struct nfs_openres *res)
6513 {
6514 struct compound_hdr hdr;
6515 int status;
6516
6517 status = decode_compound_hdr(xdr, &hdr);
6518 if (status)
6519 goto out;
6520 status = decode_sequence(xdr, &res->seq_res, rqstp);
6521 if (status)
6522 goto out;
6523 status = decode_putfh(xdr);
6524 if (status)
6525 goto out;
6526 status = decode_open(xdr, res);
6527 if (status)
6528 goto out;
6529 status = decode_getfh(xdr, &res->fh);
6530 if (status)
6531 goto out;
6532 if (res->access_request)
6533 decode_access(xdr, &res->access_supported, &res->access_result);
6534 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6535 out:
6536 return status;
6537 }
6538
6539 /*
6540 * Decode OPEN_CONFIRM response
6541 */
6542 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6543 struct xdr_stream *xdr,
6544 struct nfs_open_confirmres *res)
6545 {
6546 struct compound_hdr hdr;
6547 int status;
6548
6549 status = decode_compound_hdr(xdr, &hdr);
6550 if (status)
6551 goto out;
6552 status = decode_putfh(xdr);
6553 if (status)
6554 goto out;
6555 status = decode_open_confirm(xdr, res);
6556 out:
6557 return status;
6558 }
6559
6560 /*
6561 * Decode OPEN response
6562 */
6563 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6564 struct xdr_stream *xdr,
6565 struct nfs_openres *res)
6566 {
6567 struct compound_hdr hdr;
6568 int status;
6569
6570 status = decode_compound_hdr(xdr, &hdr);
6571 if (status)
6572 goto out;
6573 status = decode_sequence(xdr, &res->seq_res, rqstp);
6574 if (status)
6575 goto out;
6576 status = decode_putfh(xdr);
6577 if (status)
6578 goto out;
6579 status = decode_open(xdr, res);
6580 if (status)
6581 goto out;
6582 if (res->access_request)
6583 decode_access(xdr, &res->access_supported, &res->access_result);
6584 decode_getfattr(xdr, res->f_attr, res->server);
6585 out:
6586 return status;
6587 }
6588
6589 /*
6590 * Decode SETATTR response
6591 */
6592 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6593 struct xdr_stream *xdr,
6594 struct nfs_setattrres *res)
6595 {
6596 struct compound_hdr hdr;
6597 int status;
6598
6599 status = decode_compound_hdr(xdr, &hdr);
6600 if (status)
6601 goto out;
6602 status = decode_sequence(xdr, &res->seq_res, rqstp);
6603 if (status)
6604 goto out;
6605 status = decode_putfh(xdr);
6606 if (status)
6607 goto out;
6608 status = decode_setattr(xdr);
6609 if (status)
6610 goto out;
6611 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6612 out:
6613 return status;
6614 }
6615
6616 /*
6617 * Decode LOCK response
6618 */
6619 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620 struct nfs_lock_res *res)
6621 {
6622 struct compound_hdr hdr;
6623 int status;
6624
6625 status = decode_compound_hdr(xdr, &hdr);
6626 if (status)
6627 goto out;
6628 status = decode_sequence(xdr, &res->seq_res, rqstp);
6629 if (status)
6630 goto out;
6631 status = decode_putfh(xdr);
6632 if (status)
6633 goto out;
6634 status = decode_lock(xdr, res);
6635 out:
6636 return status;
6637 }
6638
6639 /*
6640 * Decode LOCKT response
6641 */
6642 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6643 struct nfs_lockt_res *res)
6644 {
6645 struct compound_hdr hdr;
6646 int status;
6647
6648 status = decode_compound_hdr(xdr, &hdr);
6649 if (status)
6650 goto out;
6651 status = decode_sequence(xdr, &res->seq_res, rqstp);
6652 if (status)
6653 goto out;
6654 status = decode_putfh(xdr);
6655 if (status)
6656 goto out;
6657 status = decode_lockt(xdr, res);
6658 out:
6659 return status;
6660 }
6661
6662 /*
6663 * Decode LOCKU response
6664 */
6665 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6666 struct nfs_locku_res *res)
6667 {
6668 struct compound_hdr hdr;
6669 int status;
6670
6671 status = decode_compound_hdr(xdr, &hdr);
6672 if (status)
6673 goto out;
6674 status = decode_sequence(xdr, &res->seq_res, rqstp);
6675 if (status)
6676 goto out;
6677 status = decode_putfh(xdr);
6678 if (status)
6679 goto out;
6680 status = decode_locku(xdr, res);
6681 out:
6682 return status;
6683 }
6684
6685 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6686 struct xdr_stream *xdr, void *dummy)
6687 {
6688 struct compound_hdr hdr;
6689 int status;
6690
6691 status = decode_compound_hdr(xdr, &hdr);
6692 if (!status)
6693 status = decode_release_lockowner(xdr);
6694 return status;
6695 }
6696
6697 /*
6698 * Decode READLINK response
6699 */
6700 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6701 struct xdr_stream *xdr,
6702 struct nfs4_readlink_res *res)
6703 {
6704 struct compound_hdr hdr;
6705 int status;
6706
6707 status = decode_compound_hdr(xdr, &hdr);
6708 if (status)
6709 goto out;
6710 status = decode_sequence(xdr, &res->seq_res, rqstp);
6711 if (status)
6712 goto out;
6713 status = decode_putfh(xdr);
6714 if (status)
6715 goto out;
6716 status = decode_readlink(xdr, rqstp);
6717 out:
6718 return status;
6719 }
6720
6721 /*
6722 * Decode READDIR response
6723 */
6724 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725 struct nfs4_readdir_res *res)
6726 {
6727 struct compound_hdr hdr;
6728 int status;
6729
6730 status = decode_compound_hdr(xdr, &hdr);
6731 if (status)
6732 goto out;
6733 status = decode_sequence(xdr, &res->seq_res, rqstp);
6734 if (status)
6735 goto out;
6736 status = decode_putfh(xdr);
6737 if (status)
6738 goto out;
6739 status = decode_readdir(xdr, rqstp, res);
6740 out:
6741 return status;
6742 }
6743
6744 /*
6745 * Decode Read response
6746 */
6747 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6748 struct nfs_pgio_res *res)
6749 {
6750 struct compound_hdr hdr;
6751 int status;
6752
6753 status = decode_compound_hdr(xdr, &hdr);
6754 res->op_status = hdr.status;
6755 if (status)
6756 goto out;
6757 status = decode_sequence(xdr, &res->seq_res, rqstp);
6758 if (status)
6759 goto out;
6760 status = decode_putfh(xdr);
6761 if (status)
6762 goto out;
6763 status = decode_read(xdr, rqstp, res);
6764 if (!status)
6765 status = res->count;
6766 out:
6767 return status;
6768 }
6769
6770 /*
6771 * Decode WRITE response
6772 */
6773 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6774 struct nfs_pgio_res *res)
6775 {
6776 struct compound_hdr hdr;
6777 int status;
6778
6779 status = decode_compound_hdr(xdr, &hdr);
6780 res->op_status = hdr.status;
6781 if (status)
6782 goto out;
6783 status = decode_sequence(xdr, &res->seq_res, rqstp);
6784 if (status)
6785 goto out;
6786 status = decode_putfh(xdr);
6787 if (status)
6788 goto out;
6789 status = decode_write(xdr, res);
6790 if (status)
6791 goto out;
6792 if (res->fattr)
6793 decode_getfattr(xdr, res->fattr, res->server);
6794 if (!status)
6795 status = res->count;
6796 out:
6797 return status;
6798 }
6799
6800 /*
6801 * Decode COMMIT response
6802 */
6803 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6804 struct nfs_commitres *res)
6805 {
6806 struct compound_hdr hdr;
6807 int status;
6808
6809 status = decode_compound_hdr(xdr, &hdr);
6810 res->op_status = hdr.status;
6811 if (status)
6812 goto out;
6813 status = decode_sequence(xdr, &res->seq_res, rqstp);
6814 if (status)
6815 goto out;
6816 status = decode_putfh(xdr);
6817 if (status)
6818 goto out;
6819 status = decode_commit(xdr, res);
6820 out:
6821 return status;
6822 }
6823
6824 /*
6825 * Decode FSINFO response
6826 */
6827 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6828 struct nfs4_fsinfo_res *res)
6829 {
6830 struct compound_hdr hdr;
6831 int status;
6832
6833 status = decode_compound_hdr(xdr, &hdr);
6834 if (!status)
6835 status = decode_sequence(xdr, &res->seq_res, req);
6836 if (!status)
6837 status = decode_putfh(xdr);
6838 if (!status)
6839 status = decode_fsinfo(xdr, res->fsinfo);
6840 return status;
6841 }
6842
6843 /*
6844 * Decode PATHCONF response
6845 */
6846 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6847 struct nfs4_pathconf_res *res)
6848 {
6849 struct compound_hdr hdr;
6850 int status;
6851
6852 status = decode_compound_hdr(xdr, &hdr);
6853 if (!status)
6854 status = decode_sequence(xdr, &res->seq_res, req);
6855 if (!status)
6856 status = decode_putfh(xdr);
6857 if (!status)
6858 status = decode_pathconf(xdr, res->pathconf);
6859 return status;
6860 }
6861
6862 /*
6863 * Decode STATFS response
6864 */
6865 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6866 struct nfs4_statfs_res *res)
6867 {
6868 struct compound_hdr hdr;
6869 int status;
6870
6871 status = decode_compound_hdr(xdr, &hdr);
6872 if (!status)
6873 status = decode_sequence(xdr, &res->seq_res, req);
6874 if (!status)
6875 status = decode_putfh(xdr);
6876 if (!status)
6877 status = decode_statfs(xdr, res->fsstat);
6878 return status;
6879 }
6880
6881 /*
6882 * Decode GETATTR_BITMAP response
6883 */
6884 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6885 struct xdr_stream *xdr,
6886 struct nfs4_server_caps_res *res)
6887 {
6888 struct compound_hdr hdr;
6889 int status;
6890
6891 status = decode_compound_hdr(xdr, &hdr);
6892 if (status)
6893 goto out;
6894 status = decode_sequence(xdr, &res->seq_res, req);
6895 if (status)
6896 goto out;
6897 status = decode_putfh(xdr);
6898 if (status)
6899 goto out;
6900 status = decode_server_caps(xdr, res);
6901 out:
6902 return status;
6903 }
6904
6905 /*
6906 * Decode RENEW response
6907 */
6908 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6909 void *__unused)
6910 {
6911 struct compound_hdr hdr;
6912 int status;
6913
6914 status = decode_compound_hdr(xdr, &hdr);
6915 if (!status)
6916 status = decode_renew(xdr);
6917 return status;
6918 }
6919
6920 /*
6921 * Decode SETCLIENTID response
6922 */
6923 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6924 struct xdr_stream *xdr,
6925 struct nfs4_setclientid_res *res)
6926 {
6927 struct compound_hdr hdr;
6928 int status;
6929
6930 status = decode_compound_hdr(xdr, &hdr);
6931 if (!status)
6932 status = decode_setclientid(xdr, res);
6933 return status;
6934 }
6935
6936 /*
6937 * Decode SETCLIENTID_CONFIRM response
6938 */
6939 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6940 struct xdr_stream *xdr)
6941 {
6942 struct compound_hdr hdr;
6943 int status;
6944
6945 status = decode_compound_hdr(xdr, &hdr);
6946 if (!status)
6947 status = decode_setclientid_confirm(xdr);
6948 return status;
6949 }
6950
6951 /*
6952 * Decode DELEGRETURN response
6953 */
6954 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6955 struct xdr_stream *xdr,
6956 struct nfs4_delegreturnres *res)
6957 {
6958 struct compound_hdr hdr;
6959 int status;
6960
6961 status = decode_compound_hdr(xdr, &hdr);
6962 if (status)
6963 goto out;
6964 status = decode_sequence(xdr, &res->seq_res, rqstp);
6965 if (status)
6966 goto out;
6967 status = decode_putfh(xdr);
6968 if (status != 0)
6969 goto out;
6970 if (res->lr_res) {
6971 status = decode_layoutreturn(xdr, res->lr_res);
6972 res->lr_ret = status;
6973 if (status)
6974 goto out;
6975 }
6976 if (res->fattr) {
6977 status = decode_getfattr(xdr, res->fattr, res->server);
6978 if (status != 0)
6979 goto out;
6980 }
6981 status = decode_delegreturn(xdr);
6982 out:
6983 return status;
6984 }
6985
6986 /*
6987 * Decode FS_LOCATIONS response
6988 */
6989 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6990 struct xdr_stream *xdr,
6991 struct nfs4_fs_locations_res *res)
6992 {
6993 struct compound_hdr hdr;
6994 int status;
6995
6996 status = decode_compound_hdr(xdr, &hdr);
6997 if (status)
6998 goto out;
6999 status = decode_sequence(xdr, &res->seq_res, req);
7000 if (status)
7001 goto out;
7002 status = decode_putfh(xdr);
7003 if (status)
7004 goto out;
7005 if (res->migration) {
7006 xdr_enter_page(xdr, PAGE_SIZE);
7007 status = decode_getfattr_generic(xdr,
7008 &res->fs_locations->fattr,
7009 NULL, res->fs_locations,
7010 NULL, res->fs_locations->server);
7011 if (status)
7012 goto out;
7013 if (res->renew)
7014 status = decode_renew(xdr);
7015 } else {
7016 status = decode_lookup(xdr);
7017 if (status)
7018 goto out;
7019 xdr_enter_page(xdr, PAGE_SIZE);
7020 status = decode_getfattr_generic(xdr,
7021 &res->fs_locations->fattr,
7022 NULL, res->fs_locations,
7023 NULL, res->fs_locations->server);
7024 }
7025 out:
7026 return status;
7027 }
7028
7029 /*
7030 * Decode SECINFO response
7031 */
7032 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7033 struct xdr_stream *xdr,
7034 struct nfs4_secinfo_res *res)
7035 {
7036 struct compound_hdr hdr;
7037 int status;
7038
7039 status = decode_compound_hdr(xdr, &hdr);
7040 if (status)
7041 goto out;
7042 status = decode_sequence(xdr, &res->seq_res, rqstp);
7043 if (status)
7044 goto out;
7045 status = decode_putfh(xdr);
7046 if (status)
7047 goto out;
7048 status = decode_secinfo(xdr, res);
7049 out:
7050 return status;
7051 }
7052
7053 /*
7054 * Decode FSID_PRESENT response
7055 */
7056 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7057 struct xdr_stream *xdr,
7058 struct nfs4_fsid_present_res *res)
7059 {
7060 struct compound_hdr hdr;
7061 int status;
7062
7063 status = decode_compound_hdr(xdr, &hdr);
7064 if (status)
7065 goto out;
7066 status = decode_sequence(xdr, &res->seq_res, rqstp);
7067 if (status)
7068 goto out;
7069 status = decode_putfh(xdr);
7070 if (status)
7071 goto out;
7072 status = decode_getfh(xdr, res->fh);
7073 if (status)
7074 goto out;
7075 if (res->renew)
7076 status = decode_renew(xdr);
7077 out:
7078 return status;
7079 }
7080
7081 #if defined(CONFIG_NFS_V4_1)
7082 /*
7083 * Decode BIND_CONN_TO_SESSION response
7084 */
7085 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7086 struct xdr_stream *xdr,
7087 void *res)
7088 {
7089 struct compound_hdr hdr;
7090 int status;
7091
7092 status = decode_compound_hdr(xdr, &hdr);
7093 if (!status)
7094 status = decode_bind_conn_to_session(xdr, res);
7095 return status;
7096 }
7097
7098 /*
7099 * Decode EXCHANGE_ID response
7100 */
7101 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7102 struct xdr_stream *xdr,
7103 void *res)
7104 {
7105 struct compound_hdr hdr;
7106 int status;
7107
7108 status = decode_compound_hdr(xdr, &hdr);
7109 if (!status)
7110 status = decode_exchange_id(xdr, res);
7111 return status;
7112 }
7113
7114 /*
7115 * Decode CREATE_SESSION response
7116 */
7117 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7118 struct xdr_stream *xdr,
7119 struct nfs41_create_session_res *res)
7120 {
7121 struct compound_hdr hdr;
7122 int status;
7123
7124 status = decode_compound_hdr(xdr, &hdr);
7125 if (!status)
7126 status = decode_create_session(xdr, res);
7127 return status;
7128 }
7129
7130 /*
7131 * Decode DESTROY_SESSION response
7132 */
7133 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7134 struct xdr_stream *xdr,
7135 void *res)
7136 {
7137 struct compound_hdr hdr;
7138 int status;
7139
7140 status = decode_compound_hdr(xdr, &hdr);
7141 if (!status)
7142 status = decode_destroy_session(xdr, res);
7143 return status;
7144 }
7145
7146 /*
7147 * Decode DESTROY_CLIENTID response
7148 */
7149 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7150 struct xdr_stream *xdr,
7151 void *res)
7152 {
7153 struct compound_hdr hdr;
7154 int status;
7155
7156 status = decode_compound_hdr(xdr, &hdr);
7157 if (!status)
7158 status = decode_destroy_clientid(xdr, res);
7159 return status;
7160 }
7161
7162 /*
7163 * Decode SEQUENCE response
7164 */
7165 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7166 struct xdr_stream *xdr,
7167 struct nfs4_sequence_res *res)
7168 {
7169 struct compound_hdr hdr;
7170 int status;
7171
7172 status = decode_compound_hdr(xdr, &hdr);
7173 if (!status)
7174 status = decode_sequence(xdr, res, rqstp);
7175 return status;
7176 }
7177
7178 /*
7179 * Decode GET_LEASE_TIME response
7180 */
7181 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7182 struct xdr_stream *xdr,
7183 struct nfs4_get_lease_time_res *res)
7184 {
7185 struct compound_hdr hdr;
7186 int status;
7187
7188 status = decode_compound_hdr(xdr, &hdr);
7189 if (!status)
7190 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7191 if (!status)
7192 status = decode_putrootfh(xdr);
7193 if (!status)
7194 status = decode_fsinfo(xdr, res->lr_fsinfo);
7195 return status;
7196 }
7197
7198 /*
7199 * Decode RECLAIM_COMPLETE response
7200 */
7201 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7202 struct xdr_stream *xdr,
7203 struct nfs41_reclaim_complete_res *res)
7204 {
7205 struct compound_hdr hdr;
7206 int status;
7207
7208 status = decode_compound_hdr(xdr, &hdr);
7209 if (!status)
7210 status = decode_sequence(xdr, &res->seq_res, rqstp);
7211 if (!status)
7212 status = decode_reclaim_complete(xdr, NULL);
7213 return status;
7214 }
7215
7216 /*
7217 * Decode GETDEVINFO response
7218 */
7219 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7220 struct xdr_stream *xdr,
7221 struct nfs4_getdeviceinfo_res *res)
7222 {
7223 struct compound_hdr hdr;
7224 int status;
7225
7226 status = decode_compound_hdr(xdr, &hdr);
7227 if (status != 0)
7228 goto out;
7229 status = decode_sequence(xdr, &res->seq_res, rqstp);
7230 if (status != 0)
7231 goto out;
7232 status = decode_getdeviceinfo(xdr, res);
7233 out:
7234 return status;
7235 }
7236
7237 /*
7238 * Decode LAYOUTGET response
7239 */
7240 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7241 struct xdr_stream *xdr,
7242 struct nfs4_layoutget_res *res)
7243 {
7244 struct compound_hdr hdr;
7245 int status;
7246
7247 status = decode_compound_hdr(xdr, &hdr);
7248 if (status)
7249 goto out;
7250 status = decode_sequence(xdr, &res->seq_res, rqstp);
7251 if (status)
7252 goto out;
7253 status = decode_putfh(xdr);
7254 if (status)
7255 goto out;
7256 status = decode_layoutget(xdr, rqstp, res);
7257 out:
7258 return status;
7259 }
7260
7261 /*
7262 * Decode LAYOUTRETURN response
7263 */
7264 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7265 struct xdr_stream *xdr,
7266 struct nfs4_layoutreturn_res *res)
7267 {
7268 struct compound_hdr hdr;
7269 int status;
7270
7271 status = decode_compound_hdr(xdr, &hdr);
7272 if (status)
7273 goto out;
7274 status = decode_sequence(xdr, &res->seq_res, rqstp);
7275 if (status)
7276 goto out;
7277 status = decode_putfh(xdr);
7278 if (status)
7279 goto out;
7280 status = decode_layoutreturn(xdr, res);
7281 out:
7282 return status;
7283 }
7284
7285 /*
7286 * Decode LAYOUTCOMMIT response
7287 */
7288 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7289 struct xdr_stream *xdr,
7290 struct nfs4_layoutcommit_res *res)
7291 {
7292 struct compound_hdr hdr;
7293 int status;
7294
7295 status = decode_compound_hdr(xdr, &hdr);
7296 if (status)
7297 goto out;
7298 status = decode_sequence(xdr, &res->seq_res, rqstp);
7299 if (status)
7300 goto out;
7301 status = decode_putfh(xdr);
7302 if (status)
7303 goto out;
7304 status = decode_layoutcommit(xdr, rqstp, res);
7305 if (status)
7306 goto out;
7307 decode_getfattr(xdr, res->fattr, res->server);
7308 out:
7309 return status;
7310 }
7311
7312 /*
7313 * Decode SECINFO_NO_NAME response
7314 */
7315 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7316 struct xdr_stream *xdr,
7317 struct nfs4_secinfo_res *res)
7318 {
7319 struct compound_hdr hdr;
7320 int status;
7321
7322 status = decode_compound_hdr(xdr, &hdr);
7323 if (status)
7324 goto out;
7325 status = decode_sequence(xdr, &res->seq_res, rqstp);
7326 if (status)
7327 goto out;
7328 status = decode_putrootfh(xdr);
7329 if (status)
7330 goto out;
7331 status = decode_secinfo_no_name(xdr, res);
7332 out:
7333 return status;
7334 }
7335
7336 /*
7337 * Decode TEST_STATEID response
7338 */
7339 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7340 struct xdr_stream *xdr,
7341 struct nfs41_test_stateid_res *res)
7342 {
7343 struct compound_hdr hdr;
7344 int status;
7345
7346 status = decode_compound_hdr(xdr, &hdr);
7347 if (status)
7348 goto out;
7349 status = decode_sequence(xdr, &res->seq_res, rqstp);
7350 if (status)
7351 goto out;
7352 status = decode_test_stateid(xdr, res);
7353 out:
7354 return status;
7355 }
7356
7357 /*
7358 * Decode FREE_STATEID response
7359 */
7360 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7361 struct xdr_stream *xdr,
7362 struct nfs41_free_stateid_res *res)
7363 {
7364 struct compound_hdr hdr;
7365 int status;
7366
7367 status = decode_compound_hdr(xdr, &hdr);
7368 if (status)
7369 goto out;
7370 status = decode_sequence(xdr, &res->seq_res, rqstp);
7371 if (status)
7372 goto out;
7373 status = decode_free_stateid(xdr, res);
7374 out:
7375 return status;
7376 }
7377 #endif /* CONFIG_NFS_V4_1 */
7378
7379 /**
7380 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7381 * the local page cache.
7382 * @xdr: XDR stream where entry resides
7383 * @entry: buffer to fill in with entry data
7384 * @plus: boolean indicating whether this should be a readdirplus entry
7385 *
7386 * Returns zero if successful, otherwise a negative errno value is
7387 * returned.
7388 *
7389 * This function is not invoked during READDIR reply decoding, but
7390 * rather whenever an application invokes the getdents(2) system call
7391 * on a directory already in our cache.
7392 */
7393 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7394 int plus)
7395 {
7396 unsigned int savep;
7397 uint32_t bitmap[3] = {0};
7398 uint32_t len;
7399 __be32 *p = xdr_inline_decode(xdr, 4);
7400 if (unlikely(!p))
7401 goto out_overflow;
7402 if (*p == xdr_zero) {
7403 p = xdr_inline_decode(xdr, 4);
7404 if (unlikely(!p))
7405 goto out_overflow;
7406 if (*p == xdr_zero)
7407 return -EAGAIN;
7408 entry->eof = 1;
7409 return -EBADCOOKIE;
7410 }
7411
7412 p = xdr_inline_decode(xdr, 12);
7413 if (unlikely(!p))
7414 goto out_overflow;
7415 entry->prev_cookie = entry->cookie;
7416 p = xdr_decode_hyper(p, &entry->cookie);
7417 entry->len = be32_to_cpup(p);
7418
7419 p = xdr_inline_decode(xdr, entry->len);
7420 if (unlikely(!p))
7421 goto out_overflow;
7422 entry->name = (const char *) p;
7423
7424 /*
7425 * In case the server doesn't return an inode number,
7426 * we fake one here. (We don't use inode number 0,
7427 * since glibc seems to choke on it...)
7428 */
7429 entry->ino = 1;
7430 entry->fattr->valid = 0;
7431
7432 if (decode_attr_bitmap(xdr, bitmap) < 0)
7433 goto out_overflow;
7434
7435 if (decode_attr_length(xdr, &len, &savep) < 0)
7436 goto out_overflow;
7437
7438 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7439 NULL, entry->label, entry->server) < 0)
7440 goto out_overflow;
7441 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7442 entry->ino = entry->fattr->mounted_on_fileid;
7443 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7444 entry->ino = entry->fattr->fileid;
7445
7446 entry->d_type = DT_UNKNOWN;
7447 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7448 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7449
7450 return 0;
7451
7452 out_overflow:
7453 print_overflow_msg(__func__, xdr);
7454 return -EAGAIN;
7455 }
7456
7457 /*
7458 * We need to translate between nfs status return values and
7459 * the local errno values which may not be the same.
7460 */
7461 static struct {
7462 int stat;
7463 int errno;
7464 } nfs_errtbl[] = {
7465 { NFS4_OK, 0 },
7466 { NFS4ERR_PERM, -EPERM },
7467 { NFS4ERR_NOENT, -ENOENT },
7468 { NFS4ERR_IO, -errno_NFSERR_IO},
7469 { NFS4ERR_NXIO, -ENXIO },
7470 { NFS4ERR_ACCESS, -EACCES },
7471 { NFS4ERR_EXIST, -EEXIST },
7472 { NFS4ERR_XDEV, -EXDEV },
7473 { NFS4ERR_NOTDIR, -ENOTDIR },
7474 { NFS4ERR_ISDIR, -EISDIR },
7475 { NFS4ERR_INVAL, -EINVAL },
7476 { NFS4ERR_FBIG, -EFBIG },
7477 { NFS4ERR_NOSPC, -ENOSPC },
7478 { NFS4ERR_ROFS, -EROFS },
7479 { NFS4ERR_MLINK, -EMLINK },
7480 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7481 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7482 { NFS4ERR_DQUOT, -EDQUOT },
7483 { NFS4ERR_STALE, -ESTALE },
7484 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7485 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7486 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7487 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7488 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7489 { NFS4ERR_BADTYPE, -EBADTYPE },
7490 { NFS4ERR_LOCKED, -EAGAIN },
7491 { NFS4ERR_SYMLINK, -ELOOP },
7492 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7493 { NFS4ERR_DEADLOCK, -EDEADLK },
7494 { -1, -EIO }
7495 };
7496
7497 /*
7498 * Convert an NFS error code to a local one.
7499 * This one is used jointly by NFSv2 and NFSv3.
7500 */
7501 static int
7502 nfs4_stat_to_errno(int stat)
7503 {
7504 int i;
7505 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7506 if (nfs_errtbl[i].stat == stat)
7507 return nfs_errtbl[i].errno;
7508 }
7509 if (stat <= 10000 || stat > 10100) {
7510 /* The server is looney tunes. */
7511 return -EREMOTEIO;
7512 }
7513 /* If we cannot translate the error, the recovery routines should
7514 * handle it.
7515 * Note: remaining NFSv4 error codes have values > 10000, so should
7516 * not conflict with native Linux error codes.
7517 */
7518 return -stat;
7519 }
7520
7521 #ifdef CONFIG_NFS_V4_2
7522 #include "nfs42xdr.c"
7523 #endif /* CONFIG_NFS_V4_2 */
7524
7525 #define PROC(proc, argtype, restype) \
7526 [NFSPROC4_CLNT_##proc] = { \
7527 .p_proc = NFSPROC4_COMPOUND, \
7528 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7529 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7530 .p_arglen = NFS4_##argtype##_sz, \
7531 .p_replen = NFS4_##restype##_sz, \
7532 .p_statidx = NFSPROC4_CLNT_##proc, \
7533 .p_name = #proc, \
7534 }
7535
7536 #define STUB(proc) \
7537 [NFSPROC4_CLNT_##proc] = { \
7538 .p_name = #proc, \
7539 }
7540
7541 struct rpc_procinfo nfs4_procedures[] = {
7542 PROC(READ, enc_read, dec_read),
7543 PROC(WRITE, enc_write, dec_write),
7544 PROC(COMMIT, enc_commit, dec_commit),
7545 PROC(OPEN, enc_open, dec_open),
7546 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7547 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7548 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7549 PROC(CLOSE, enc_close, dec_close),
7550 PROC(SETATTR, enc_setattr, dec_setattr),
7551 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7552 PROC(RENEW, enc_renew, dec_renew),
7553 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7554 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7555 PROC(LOCK, enc_lock, dec_lock),
7556 PROC(LOCKT, enc_lockt, dec_lockt),
7557 PROC(LOCKU, enc_locku, dec_locku),
7558 PROC(ACCESS, enc_access, dec_access),
7559 PROC(GETATTR, enc_getattr, dec_getattr),
7560 PROC(LOOKUP, enc_lookup, dec_lookup),
7561 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7562 PROC(REMOVE, enc_remove, dec_remove),
7563 PROC(RENAME, enc_rename, dec_rename),
7564 PROC(LINK, enc_link, dec_link),
7565 PROC(SYMLINK, enc_symlink, dec_symlink),
7566 PROC(CREATE, enc_create, dec_create),
7567 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7568 PROC(STATFS, enc_statfs, dec_statfs),
7569 PROC(READLINK, enc_readlink, dec_readlink),
7570 PROC(READDIR, enc_readdir, dec_readdir),
7571 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7572 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7573 PROC(GETACL, enc_getacl, dec_getacl),
7574 PROC(SETACL, enc_setacl, dec_setacl),
7575 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7576 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7577 PROC(SECINFO, enc_secinfo, dec_secinfo),
7578 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7579 #if defined(CONFIG_NFS_V4_1)
7580 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7581 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7582 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7583 PROC(SEQUENCE, enc_sequence, dec_sequence),
7584 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7585 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7586 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7587 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7588 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7589 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7590 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7591 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7592 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7593 STUB(GETDEVICELIST),
7594 PROC(BIND_CONN_TO_SESSION,
7595 enc_bind_conn_to_session, dec_bind_conn_to_session),
7596 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7597 #endif /* CONFIG_NFS_V4_1 */
7598 #ifdef CONFIG_NFS_V4_2
7599 PROC(SEEK, enc_seek, dec_seek),
7600 PROC(ALLOCATE, enc_allocate, dec_allocate),
7601 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7602 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7603 PROC(CLONE, enc_clone, dec_clone),
7604 PROC(COPY, enc_copy, dec_copy),
7605 #endif /* CONFIG_NFS_V4_2 */
7606 };
7607
7608 const struct rpc_version nfs_version4 = {
7609 .number = 4,
7610 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7611 .procs = nfs4_procedures
7612 };
7613
7614 /*
7615 * Local variables:
7616 * c-basic-offset: 8
7617 * End:
7618 */
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