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UBUNTU: SAUCE: security,perf: Allow further restriction of perf_event_open
[mirror_ubuntu-bionic-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/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_lookupp_maxsz (op_encode_hdr_maxsz)
163 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
164 #define encode_share_access_maxsz \
165 (2)
166 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
167 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
168 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
169 #define encode_open_maxsz (op_encode_hdr_maxsz + \
170 2 + encode_share_access_maxsz + 2 + \
171 open_owner_id_maxsz + \
172 encode_opentype_maxsz + \
173 encode_claim_null_maxsz)
174 #define decode_space_limit_maxsz (3)
175 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
176 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
177 decode_space_limit_maxsz + \
178 decode_ace_maxsz)
179 #define decode_change_info_maxsz (5)
180 #define decode_open_maxsz (op_decode_hdr_maxsz + \
181 decode_stateid_maxsz + \
182 decode_change_info_maxsz + 1 + \
183 nfs4_fattr_bitmap_maxsz + \
184 decode_delegation_maxsz)
185 #define encode_open_confirm_maxsz \
186 (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 1)
188 #define decode_open_confirm_maxsz \
189 (op_decode_hdr_maxsz + \
190 decode_stateid_maxsz)
191 #define encode_open_downgrade_maxsz \
192 (op_encode_hdr_maxsz + \
193 encode_stateid_maxsz + 1 + \
194 encode_share_access_maxsz)
195 #define decode_open_downgrade_maxsz \
196 (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198 #define encode_close_maxsz (op_encode_hdr_maxsz + \
199 1 + encode_stateid_maxsz)
200 #define decode_close_maxsz (op_decode_hdr_maxsz + \
201 decode_stateid_maxsz)
202 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
203 encode_stateid_maxsz + \
204 encode_attrs_maxsz)
205 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
206 nfs4_fattr_bitmap_maxsz)
207 #define encode_read_maxsz (op_encode_hdr_maxsz + \
208 encode_stateid_maxsz + 3)
209 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
210 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
211 2 + encode_verifier_maxsz + 5 + \
212 nfs4_label_maxsz)
213 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
214 decode_verifier_maxsz)
215 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
216 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
217 #define encode_write_maxsz (op_encode_hdr_maxsz + \
218 encode_stateid_maxsz + 4)
219 #define decode_write_maxsz (op_decode_hdr_maxsz + \
220 2 + decode_verifier_maxsz)
221 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
222 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
223 decode_verifier_maxsz)
224 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
225 nfs4_name_maxsz)
226 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz)
228 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
229 2 * nfs4_name_maxsz)
230 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
231 decode_change_info_maxsz + \
232 decode_change_info_maxsz)
233 #define encode_link_maxsz (op_encode_hdr_maxsz + \
234 nfs4_name_maxsz)
235 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
236 #define encode_lockowner_maxsz (7)
237 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
238 7 + \
239 1 + encode_stateid_maxsz + 1 + \
240 encode_lockowner_maxsz)
241 #define decode_lock_denied_maxsz \
242 (8 + decode_lockowner_maxsz)
243 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
244 decode_lock_denied_maxsz)
245 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
246 encode_lockowner_maxsz)
247 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
248 decode_lock_denied_maxsz)
249 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
250 encode_stateid_maxsz + \
251 4)
252 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
253 decode_stateid_maxsz)
254 #define encode_release_lockowner_maxsz \
255 (op_encode_hdr_maxsz + \
256 encode_lockowner_maxsz)
257 #define decode_release_lockowner_maxsz \
258 (op_decode_hdr_maxsz)
259 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
260 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
261 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
262 1 + nfs4_name_maxsz + \
263 1 + \
264 nfs4_fattr_maxsz)
265 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
266 #define encode_create_maxsz (op_encode_hdr_maxsz + \
267 1 + 2 + nfs4_name_maxsz + \
268 encode_attrs_maxsz)
269 #define decode_create_maxsz (op_decode_hdr_maxsz + \
270 decode_change_info_maxsz + \
271 nfs4_fattr_bitmap_maxsz)
272 #define encode_statfs_maxsz (encode_getattr_maxsz)
273 #define decode_statfs_maxsz (decode_getattr_maxsz)
274 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
275 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
276 #define encode_getacl_maxsz (encode_getattr_maxsz)
277 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
278 nfs4_fattr_bitmap_maxsz + 1)
279 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
280 encode_stateid_maxsz + 3)
281 #define decode_setacl_maxsz (decode_setattr_maxsz)
282 #define encode_fs_locations_maxsz \
283 (encode_getattr_maxsz)
284 #define decode_fs_locations_maxsz \
285 (0)
286 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
287 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
288
289 #if defined(CONFIG_NFS_V4_1)
290 #define NFS4_MAX_MACHINE_NAME_LEN (64)
291 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
292 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
293
294 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
295 encode_verifier_maxsz + \
296 1 /* co_ownerid.len */ + \
297 /* eia_clientowner */ \
298 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
299 1 /* flags */ + \
300 1 /* spa_how */ + \
301 /* max is SP4_MACH_CRED (for now) */ + \
302 1 + NFS4_OP_MAP_NUM_WORDS + \
303 1 + NFS4_OP_MAP_NUM_WORDS + \
304 1 /* implementation id array of size 1 */ + \
305 1 /* nii_domain */ + \
306 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
307 1 /* nii_name */ + \
308 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
309 3 /* nii_date */)
310 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
311 2 /* eir_clientid */ + \
312 1 /* eir_sequenceid */ + \
313 1 /* eir_flags */ + \
314 1 /* spr_how */ + \
315 /* max is SP4_MACH_CRED (for now) */ + \
316 1 + NFS4_OP_MAP_NUM_WORDS + \
317 1 + NFS4_OP_MAP_NUM_WORDS + \
318 2 /* eir_server_owner.so_minor_id */ + \
319 /* eir_server_owner.so_major_id<> */ \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
321 /* eir_server_scope<> */ \
322 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
323 1 /* eir_server_impl_id array length */ + \
324 1 /* nii_domain */ + \
325 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
326 1 /* nii_name */ + \
327 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
328 3 /* nii_date */)
329 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
330 #define decode_channel_attrs_maxsz (6 + \
331 1 /* ca_rdma_ird.len */ + \
332 1 /* ca_rdma_ird */)
333 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
334 2 /* csa_clientid */ + \
335 1 /* csa_sequence */ + \
336 1 /* csa_flags */ + \
337 encode_channel_attrs_maxsz + \
338 encode_channel_attrs_maxsz + \
339 1 /* csa_cb_program */ + \
340 1 /* csa_sec_parms.len (1) */ + \
341 1 /* cb_secflavor (AUTH_SYS) */ + \
342 1 /* stamp */ + \
343 1 /* machinename.len */ + \
344 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
345 1 /* uid */ + \
346 1 /* gid */ + \
347 1 /* gids.len (0) */)
348 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
349 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350 1 /* csr_sequence */ + \
351 1 /* csr_flags */ + \
352 decode_channel_attrs_maxsz + \
353 decode_channel_attrs_maxsz)
354 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
355 /* bctsa_sessid */ \
356 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
357 1 /* bctsa_dir */ + \
358 1 /* bctsa_use_conn_in_rdma_mode */)
359 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
360 /* bctsr_sessid */ \
361 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
362 1 /* bctsr_dir */ + \
363 1 /* bctsr_use_conn_in_rdma_mode */)
364 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
365 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
366 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
367 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
368 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
369 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
370 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
372 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
373 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
374 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
375 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
376 1 /* layout type */ + \
377 1 /* maxcount */ + \
378 1 /* bitmap size */ + \
379 1 /* notification bitmap length */ + \
380 1 /* notification bitmap, word 0 */)
381 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
382 1 /* layout type */ + \
383 1 /* opaque devaddr4 length */ + \
384 /* devaddr4 payload is read into page */ \
385 1 /* notification bitmap length */ + \
386 1 /* notification bitmap, word 0 */)
387 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
388 encode_stateid_maxsz)
389 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
390 decode_stateid_maxsz + \
391 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
392 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
393 2 /* offset */ + \
394 2 /* length */ + \
395 1 /* reclaim */ + \
396 encode_stateid_maxsz + \
397 1 /* new offset (true) */ + \
398 2 /* last byte written */ + \
399 1 /* nt_timechanged (false) */ + \
400 1 /* layoutupdate4 layout type */ + \
401 1 /* layoutupdate4 opaqueue len */)
402 /* the actual content of layoutupdate4 should
403 be allocated by drivers and spliced in
404 using xdr_write_pages */
405 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
406 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
407 encode_stateid_maxsz + \
408 1 + \
409 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
410 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
411 1 + decode_stateid_maxsz)
412 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
413 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
414 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
415 XDR_QUADLEN(NFS4_STATEID_SIZE))
416 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
417 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
418 XDR_QUADLEN(NFS4_STATEID_SIZE))
419 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
420 #else /* CONFIG_NFS_V4_1 */
421 #define encode_sequence_maxsz 0
422 #define decode_sequence_maxsz 0
423 #define encode_layoutreturn_maxsz 0
424 #define decode_layoutreturn_maxsz 0
425 #endif /* CONFIG_NFS_V4_1 */
426
427 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
428 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
429 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
430 encode_sequence_maxsz + \
431 encode_putfh_maxsz + \
432 encode_read_maxsz)
433 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_read_maxsz)
437 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
438 encode_sequence_maxsz + \
439 encode_putfh_maxsz + \
440 encode_readlink_maxsz)
441 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_readlink_maxsz)
445 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
446 encode_sequence_maxsz + \
447 encode_putfh_maxsz + \
448 encode_readdir_maxsz)
449 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
450 decode_sequence_maxsz + \
451 decode_putfh_maxsz + \
452 decode_readdir_maxsz)
453 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
454 encode_sequence_maxsz + \
455 encode_putfh_maxsz + \
456 encode_write_maxsz + \
457 encode_getattr_maxsz)
458 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
459 decode_sequence_maxsz + \
460 decode_putfh_maxsz + \
461 decode_write_maxsz + \
462 decode_getattr_maxsz)
463 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_commit_maxsz)
467 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
468 decode_sequence_maxsz + \
469 decode_putfh_maxsz + \
470 decode_commit_maxsz)
471 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
472 encode_sequence_maxsz + \
473 encode_putfh_maxsz + \
474 encode_open_maxsz + \
475 encode_access_maxsz + \
476 encode_getfh_maxsz + \
477 encode_getattr_maxsz)
478 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
479 decode_sequence_maxsz + \
480 decode_putfh_maxsz + \
481 decode_open_maxsz + \
482 decode_access_maxsz + \
483 decode_getfh_maxsz + \
484 decode_getattr_maxsz)
485 #define NFS4_enc_open_confirm_sz \
486 (compound_encode_hdr_maxsz + \
487 encode_putfh_maxsz + \
488 encode_open_confirm_maxsz)
489 #define NFS4_dec_open_confirm_sz \
490 (compound_decode_hdr_maxsz + \
491 decode_putfh_maxsz + \
492 decode_open_confirm_maxsz)
493 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
494 encode_sequence_maxsz + \
495 encode_putfh_maxsz + \
496 encode_open_maxsz + \
497 encode_access_maxsz + \
498 encode_getattr_maxsz)
499 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
500 decode_sequence_maxsz + \
501 decode_putfh_maxsz + \
502 decode_open_maxsz + \
503 decode_access_maxsz + \
504 decode_getattr_maxsz)
505 #define NFS4_enc_open_downgrade_sz \
506 (compound_encode_hdr_maxsz + \
507 encode_sequence_maxsz + \
508 encode_putfh_maxsz + \
509 encode_layoutreturn_maxsz + \
510 encode_open_downgrade_maxsz)
511 #define NFS4_dec_open_downgrade_sz \
512 (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_layoutreturn_maxsz + \
516 decode_open_downgrade_maxsz)
517 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_layoutreturn_maxsz + \
521 encode_close_maxsz + \
522 encode_getattr_maxsz)
523 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
524 decode_sequence_maxsz + \
525 decode_putfh_maxsz + \
526 decode_layoutreturn_maxsz + \
527 decode_close_maxsz + \
528 decode_getattr_maxsz)
529 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
530 encode_sequence_maxsz + \
531 encode_putfh_maxsz + \
532 encode_setattr_maxsz + \
533 encode_getattr_maxsz)
534 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_setattr_maxsz + \
538 decode_getattr_maxsz)
539 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
540 encode_sequence_maxsz + \
541 encode_putfh_maxsz + \
542 encode_fsinfo_maxsz)
543 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
544 decode_sequence_maxsz + \
545 decode_putfh_maxsz + \
546 decode_fsinfo_maxsz)
547 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
548 encode_renew_maxsz)
549 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
550 decode_renew_maxsz)
551 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
552 encode_setclientid_maxsz)
553 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
554 decode_setclientid_maxsz)
555 #define NFS4_enc_setclientid_confirm_sz \
556 (compound_encode_hdr_maxsz + \
557 encode_setclientid_confirm_maxsz)
558 #define NFS4_dec_setclientid_confirm_sz \
559 (compound_decode_hdr_maxsz + \
560 decode_setclientid_confirm_maxsz)
561 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
562 encode_sequence_maxsz + \
563 encode_putfh_maxsz + \
564 encode_lock_maxsz)
565 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
566 decode_sequence_maxsz + \
567 decode_putfh_maxsz + \
568 decode_lock_maxsz)
569 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
570 encode_sequence_maxsz + \
571 encode_putfh_maxsz + \
572 encode_lockt_maxsz)
573 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
574 decode_sequence_maxsz + \
575 decode_putfh_maxsz + \
576 decode_lockt_maxsz)
577 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_locku_maxsz)
581 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_locku_maxsz)
585 #define NFS4_enc_release_lockowner_sz \
586 (compound_encode_hdr_maxsz + \
587 encode_lockowner_maxsz)
588 #define NFS4_dec_release_lockowner_sz \
589 (compound_decode_hdr_maxsz + \
590 decode_lockowner_maxsz)
591 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_access_maxsz + \
595 encode_getattr_maxsz)
596 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
597 decode_sequence_maxsz + \
598 decode_putfh_maxsz + \
599 decode_access_maxsz + \
600 decode_getattr_maxsz)
601 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
602 encode_sequence_maxsz + \
603 encode_putfh_maxsz + \
604 encode_getattr_maxsz + \
605 encode_renew_maxsz)
606 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
607 decode_sequence_maxsz + \
608 decode_putfh_maxsz + \
609 decode_getattr_maxsz + \
610 decode_renew_maxsz)
611 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
612 encode_sequence_maxsz + \
613 encode_putfh_maxsz + \
614 encode_lookup_maxsz + \
615 encode_getattr_maxsz + \
616 encode_getfh_maxsz)
617 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
618 decode_sequence_maxsz + \
619 decode_putfh_maxsz + \
620 decode_lookup_maxsz + \
621 decode_getattr_maxsz + \
622 decode_getfh_maxsz)
623 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_lookupp_maxsz + \
627 encode_getattr_maxsz + \
628 encode_getfh_maxsz)
629 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
630 decode_sequence_maxsz + \
631 decode_putfh_maxsz + \
632 decode_lookupp_maxsz + \
633 decode_getattr_maxsz + \
634 decode_getfh_maxsz)
635 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
636 encode_sequence_maxsz + \
637 encode_putrootfh_maxsz + \
638 encode_getattr_maxsz + \
639 encode_getfh_maxsz)
640 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
641 decode_sequence_maxsz + \
642 decode_putrootfh_maxsz + \
643 decode_getattr_maxsz + \
644 decode_getfh_maxsz)
645 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
646 encode_sequence_maxsz + \
647 encode_putfh_maxsz + \
648 encode_remove_maxsz)
649 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
650 decode_sequence_maxsz + \
651 decode_putfh_maxsz + \
652 decode_remove_maxsz)
653 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
654 encode_sequence_maxsz + \
655 encode_putfh_maxsz + \
656 encode_savefh_maxsz + \
657 encode_putfh_maxsz + \
658 encode_rename_maxsz)
659 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
660 decode_sequence_maxsz + \
661 decode_putfh_maxsz + \
662 decode_savefh_maxsz + \
663 decode_putfh_maxsz + \
664 decode_rename_maxsz)
665 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
666 encode_sequence_maxsz + \
667 encode_putfh_maxsz + \
668 encode_savefh_maxsz + \
669 encode_putfh_maxsz + \
670 encode_link_maxsz + \
671 encode_restorefh_maxsz + \
672 encode_getattr_maxsz)
673 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putfh_maxsz + \
676 decode_savefh_maxsz + \
677 decode_putfh_maxsz + \
678 decode_link_maxsz + \
679 decode_restorefh_maxsz + \
680 decode_getattr_maxsz)
681 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_symlink_maxsz + \
685 encode_getattr_maxsz + \
686 encode_getfh_maxsz)
687 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
688 decode_sequence_maxsz + \
689 decode_putfh_maxsz + \
690 decode_symlink_maxsz + \
691 decode_getattr_maxsz + \
692 decode_getfh_maxsz)
693 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
694 encode_sequence_maxsz + \
695 encode_putfh_maxsz + \
696 encode_create_maxsz + \
697 encode_getfh_maxsz + \
698 encode_getattr_maxsz)
699 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
700 decode_sequence_maxsz + \
701 decode_putfh_maxsz + \
702 decode_create_maxsz + \
703 decode_getfh_maxsz + \
704 decode_getattr_maxsz)
705 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_getattr_maxsz)
709 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_getattr_maxsz)
713 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
714 encode_sequence_maxsz + \
715 encode_putfh_maxsz + \
716 encode_statfs_maxsz)
717 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
718 decode_sequence_maxsz + \
719 decode_putfh_maxsz + \
720 decode_statfs_maxsz)
721 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_getattr_maxsz)
725 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_getattr_maxsz)
729 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_layoutreturn_maxsz + \
733 encode_delegreturn_maxsz + \
734 encode_getattr_maxsz)
735 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
736 decode_sequence_maxsz + \
737 decode_putfh_maxsz + \
738 decode_layoutreturn_maxsz + \
739 decode_delegreturn_maxsz + \
740 decode_getattr_maxsz)
741 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
742 encode_sequence_maxsz + \
743 encode_putfh_maxsz + \
744 encode_getacl_maxsz)
745 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
746 decode_sequence_maxsz + \
747 decode_putfh_maxsz + \
748 decode_getacl_maxsz)
749 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
750 encode_sequence_maxsz + \
751 encode_putfh_maxsz + \
752 encode_setacl_maxsz)
753 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
754 decode_sequence_maxsz + \
755 decode_putfh_maxsz + \
756 decode_setacl_maxsz)
757 #define NFS4_enc_fs_locations_sz \
758 (compound_encode_hdr_maxsz + \
759 encode_sequence_maxsz + \
760 encode_putfh_maxsz + \
761 encode_lookup_maxsz + \
762 encode_fs_locations_maxsz + \
763 encode_renew_maxsz)
764 #define NFS4_dec_fs_locations_sz \
765 (compound_decode_hdr_maxsz + \
766 decode_sequence_maxsz + \
767 decode_putfh_maxsz + \
768 decode_lookup_maxsz + \
769 decode_fs_locations_maxsz + \
770 decode_renew_maxsz)
771 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
772 encode_sequence_maxsz + \
773 encode_putfh_maxsz + \
774 encode_secinfo_maxsz)
775 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
776 decode_sequence_maxsz + \
777 decode_putfh_maxsz + \
778 decode_secinfo_maxsz)
779 #define NFS4_enc_fsid_present_sz \
780 (compound_encode_hdr_maxsz + \
781 encode_sequence_maxsz + \
782 encode_putfh_maxsz + \
783 encode_getfh_maxsz + \
784 encode_renew_maxsz)
785 #define NFS4_dec_fsid_present_sz \
786 (compound_decode_hdr_maxsz + \
787 decode_sequence_maxsz + \
788 decode_putfh_maxsz + \
789 decode_getfh_maxsz + \
790 decode_renew_maxsz)
791 #if defined(CONFIG_NFS_V4_1)
792 #define NFS4_enc_bind_conn_to_session_sz \
793 (compound_encode_hdr_maxsz + \
794 encode_bind_conn_to_session_maxsz)
795 #define NFS4_dec_bind_conn_to_session_sz \
796 (compound_decode_hdr_maxsz + \
797 decode_bind_conn_to_session_maxsz)
798 #define NFS4_enc_exchange_id_sz \
799 (compound_encode_hdr_maxsz + \
800 encode_exchange_id_maxsz)
801 #define NFS4_dec_exchange_id_sz \
802 (compound_decode_hdr_maxsz + \
803 decode_exchange_id_maxsz)
804 #define NFS4_enc_create_session_sz \
805 (compound_encode_hdr_maxsz + \
806 encode_create_session_maxsz)
807 #define NFS4_dec_create_session_sz \
808 (compound_decode_hdr_maxsz + \
809 decode_create_session_maxsz)
810 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
811 encode_destroy_session_maxsz)
812 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
813 decode_destroy_session_maxsz)
814 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
815 encode_destroy_clientid_maxsz)
816 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
817 decode_destroy_clientid_maxsz)
818 #define NFS4_enc_sequence_sz \
819 (compound_decode_hdr_maxsz + \
820 encode_sequence_maxsz)
821 #define NFS4_dec_sequence_sz \
822 (compound_decode_hdr_maxsz + \
823 decode_sequence_maxsz)
824 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
825 encode_sequence_maxsz + \
826 encode_putrootfh_maxsz + \
827 encode_fsinfo_maxsz)
828 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
829 decode_sequence_maxsz + \
830 decode_putrootfh_maxsz + \
831 decode_fsinfo_maxsz)
832 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
833 encode_sequence_maxsz + \
834 encode_reclaim_complete_maxsz)
835 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
836 decode_sequence_maxsz + \
837 decode_reclaim_complete_maxsz)
838 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz +\
840 encode_getdeviceinfo_maxsz)
841 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_getdeviceinfo_maxsz)
844 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
845 encode_sequence_maxsz + \
846 encode_putfh_maxsz + \
847 encode_layoutget_maxsz)
848 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
849 decode_sequence_maxsz + \
850 decode_putfh_maxsz + \
851 decode_layoutget_maxsz)
852 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
853 encode_sequence_maxsz +\
854 encode_putfh_maxsz + \
855 encode_layoutcommit_maxsz + \
856 encode_getattr_maxsz)
857 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_putfh_maxsz + \
860 decode_layoutcommit_maxsz + \
861 decode_getattr_maxsz)
862 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_putfh_maxsz + \
865 encode_layoutreturn_maxsz)
866 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
867 decode_sequence_maxsz + \
868 decode_putfh_maxsz + \
869 decode_layoutreturn_maxsz)
870 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz + \
872 encode_putrootfh_maxsz +\
873 encode_secinfo_no_name_maxsz)
874 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
875 decode_sequence_maxsz + \
876 decode_putrootfh_maxsz + \
877 decode_secinfo_no_name_maxsz)
878 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
879 encode_sequence_maxsz + \
880 encode_test_stateid_maxsz)
881 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
882 decode_sequence_maxsz + \
883 decode_test_stateid_maxsz)
884 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
885 encode_sequence_maxsz + \
886 encode_free_stateid_maxsz)
887 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
888 decode_sequence_maxsz + \
889 decode_free_stateid_maxsz)
890
891 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
892 compound_encode_hdr_maxsz +
893 encode_sequence_maxsz +
894 encode_putfh_maxsz +
895 encode_getattr_maxsz) *
896 XDR_UNIT);
897
898 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
899 compound_decode_hdr_maxsz +
900 decode_sequence_maxsz +
901 decode_putfh_maxsz) *
902 XDR_UNIT);
903
904 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
905 compound_decode_hdr_maxsz +
906 decode_sequence_maxsz) *
907 XDR_UNIT);
908 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
909 #endif /* CONFIG_NFS_V4_1 */
910
911 static const umode_t nfs_type2fmt[] = {
912 [NF4BAD] = 0,
913 [NF4REG] = S_IFREG,
914 [NF4DIR] = S_IFDIR,
915 [NF4BLK] = S_IFBLK,
916 [NF4CHR] = S_IFCHR,
917 [NF4LNK] = S_IFLNK,
918 [NF4SOCK] = S_IFSOCK,
919 [NF4FIFO] = S_IFIFO,
920 [NF4ATTRDIR] = 0,
921 [NF4NAMEDATTR] = 0,
922 };
923
924 struct compound_hdr {
925 int32_t status;
926 uint32_t nops;
927 __be32 * nops_p;
928 uint32_t taglen;
929 char * tag;
930 uint32_t replen; /* expected reply words */
931 u32 minorversion;
932 };
933
934 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
935 {
936 __be32 *p = xdr_reserve_space(xdr, nbytes);
937 BUG_ON(!p);
938 return p;
939 }
940
941 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
942 {
943 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
944 }
945
946 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
947 {
948 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
949 }
950
951 static void encode_uint32(struct xdr_stream *xdr, u32 n)
952 {
953 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
954 }
955
956 static void encode_uint64(struct xdr_stream *xdr, u64 n)
957 {
958 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
959 }
960
961 static void encode_nfs4_seqid(struct xdr_stream *xdr,
962 const struct nfs_seqid *seqid)
963 {
964 if (seqid != NULL)
965 encode_uint32(xdr, seqid->sequence->counter);
966 else
967 encode_uint32(xdr, 0);
968 }
969
970 static void encode_compound_hdr(struct xdr_stream *xdr,
971 struct rpc_rqst *req,
972 struct compound_hdr *hdr)
973 {
974 __be32 *p;
975 struct rpc_auth *auth = req->rq_cred->cr_auth;
976
977 /* initialize running count of expected bytes in reply.
978 * NOTE: the replied tag SHOULD be the same is the one sent,
979 * but this is not required as a MUST for the server to do so. */
980 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
981
982 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
983 encode_string(xdr, hdr->taglen, hdr->tag);
984 p = reserve_space(xdr, 8);
985 *p++ = cpu_to_be32(hdr->minorversion);
986 hdr->nops_p = p;
987 *p = cpu_to_be32(hdr->nops);
988 }
989
990 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
991 uint32_t replen,
992 struct compound_hdr *hdr)
993 {
994 encode_uint32(xdr, op);
995 hdr->nops++;
996 hdr->replen += replen;
997 }
998
999 static void encode_nops(struct compound_hdr *hdr)
1000 {
1001 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1002 *hdr->nops_p = htonl(hdr->nops);
1003 }
1004
1005 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1006 {
1007 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1008 }
1009
1010 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1011 {
1012 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1013 }
1014
1015 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1016 const struct nfs4_label *label,
1017 const umode_t *umask,
1018 const struct nfs_server *server,
1019 const uint32_t attrmask[])
1020 {
1021 char owner_name[IDMAP_NAMESZ];
1022 char owner_group[IDMAP_NAMESZ];
1023 int owner_namelen = 0;
1024 int owner_grouplen = 0;
1025 __be32 *p;
1026 unsigned i;
1027 uint32_t len = 0;
1028 uint32_t bmval_len;
1029 uint32_t bmval[3] = { 0 };
1030
1031 /*
1032 * We reserve enough space to write the entire attribute buffer at once.
1033 */
1034 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1035 bmval[0] |= FATTR4_WORD0_SIZE;
1036 len += 8;
1037 }
1038 if (iap->ia_valid & ATTR_MODE) {
1039 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1040 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1041 len += 8;
1042 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1043 bmval[1] |= FATTR4_WORD1_MODE;
1044 len += 4;
1045 }
1046 }
1047 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1048 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1049 if (owner_namelen < 0) {
1050 dprintk("nfs: couldn't resolve uid %d to string\n",
1051 from_kuid(&init_user_ns, iap->ia_uid));
1052 /* XXX */
1053 strcpy(owner_name, "nobody");
1054 owner_namelen = sizeof("nobody") - 1;
1055 /* goto out; */
1056 }
1057 bmval[1] |= FATTR4_WORD1_OWNER;
1058 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1059 }
1060 if ((iap->ia_valid & ATTR_GID) &&
1061 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1062 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1063 if (owner_grouplen < 0) {
1064 dprintk("nfs: couldn't resolve gid %d to string\n",
1065 from_kgid(&init_user_ns, iap->ia_gid));
1066 strcpy(owner_group, "nobody");
1067 owner_grouplen = sizeof("nobody") - 1;
1068 /* goto out; */
1069 }
1070 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1071 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1072 }
1073 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1074 if (iap->ia_valid & ATTR_ATIME_SET) {
1075 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1076 len += 16;
1077 } else if (iap->ia_valid & ATTR_ATIME) {
1078 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1079 len += 4;
1080 }
1081 }
1082 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1083 if (iap->ia_valid & ATTR_MTIME_SET) {
1084 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1085 len += 16;
1086 } else if (iap->ia_valid & ATTR_MTIME) {
1087 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1088 len += 4;
1089 }
1090 }
1091
1092 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1093 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1094 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1095 }
1096
1097 if (bmval[2] != 0)
1098 bmval_len = 3;
1099 else if (bmval[1] != 0)
1100 bmval_len = 2;
1101 else
1102 bmval_len = 1;
1103
1104 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1105
1106 *p++ = cpu_to_be32(bmval_len);
1107 for (i = 0; i < bmval_len; i++)
1108 *p++ = cpu_to_be32(bmval[i]);
1109 *p++ = cpu_to_be32(len);
1110
1111 if (bmval[0] & FATTR4_WORD0_SIZE)
1112 p = xdr_encode_hyper(p, iap->ia_size);
1113 if (bmval[1] & FATTR4_WORD1_MODE)
1114 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1115 if (bmval[1] & FATTR4_WORD1_OWNER)
1116 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1117 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1118 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1119 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1120 if (iap->ia_valid & ATTR_ATIME_SET) {
1121 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1123 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1124 } else
1125 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126 }
1127 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1128 if (iap->ia_valid & ATTR_MTIME_SET) {
1129 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1130 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1131 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1132 } else
1133 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1134 }
1135 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1136 *p++ = cpu_to_be32(label->lfs);
1137 *p++ = cpu_to_be32(label->pi);
1138 *p++ = cpu_to_be32(label->len);
1139 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1140 }
1141 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1142 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1143 *p++ = cpu_to_be32(*umask);
1144 }
1145
1146 /* out: */
1147 }
1148
1149 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1150 {
1151 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1152 encode_uint32(xdr, access);
1153 }
1154
1155 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1156 {
1157 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1158 encode_nfs4_seqid(xdr, arg->seqid);
1159 encode_nfs4_stateid(xdr, &arg->stateid);
1160 }
1161
1162 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1163 {
1164 __be32 *p;
1165
1166 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1167 p = reserve_space(xdr, 12);
1168 p = xdr_encode_hyper(p, args->offset);
1169 *p = cpu_to_be32(args->count);
1170 }
1171
1172 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1173 {
1174 __be32 *p;
1175
1176 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1177 encode_uint32(xdr, create->ftype);
1178
1179 switch (create->ftype) {
1180 case NF4LNK:
1181 p = reserve_space(xdr, 4);
1182 *p = cpu_to_be32(create->u.symlink.len);
1183 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1184 create->u.symlink.len);
1185 xdr->buf->flags |= XDRBUF_WRITE;
1186 break;
1187
1188 case NF4BLK: case NF4CHR:
1189 p = reserve_space(xdr, 8);
1190 *p++ = cpu_to_be32(create->u.device.specdata1);
1191 *p = cpu_to_be32(create->u.device.specdata2);
1192 break;
1193
1194 default:
1195 break;
1196 }
1197
1198 encode_string(xdr, create->name->len, create->name->name);
1199 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1200 create->server, create->server->attr_bitmask);
1201 }
1202
1203 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1204 {
1205 __be32 *p;
1206
1207 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208 p = reserve_space(xdr, 8);
1209 *p++ = cpu_to_be32(1);
1210 *p = cpu_to_be32(bitmap);
1211 }
1212
1213 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1214 {
1215 __be32 *p;
1216
1217 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218 p = reserve_space(xdr, 12);
1219 *p++ = cpu_to_be32(2);
1220 *p++ = cpu_to_be32(bm0);
1221 *p = cpu_to_be32(bm1);
1222 }
1223
1224 static void
1225 encode_getattr_three(struct xdr_stream *xdr,
1226 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1227 struct compound_hdr *hdr)
1228 {
1229 __be32 *p;
1230
1231 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1232 if (bm2) {
1233 p = reserve_space(xdr, 16);
1234 *p++ = cpu_to_be32(3);
1235 *p++ = cpu_to_be32(bm0);
1236 *p++ = cpu_to_be32(bm1);
1237 *p = cpu_to_be32(bm2);
1238 } else if (bm1) {
1239 p = reserve_space(xdr, 12);
1240 *p++ = cpu_to_be32(2);
1241 *p++ = cpu_to_be32(bm0);
1242 *p = cpu_to_be32(bm1);
1243 } else {
1244 p = reserve_space(xdr, 8);
1245 *p++ = cpu_to_be32(1);
1246 *p = cpu_to_be32(bm0);
1247 }
1248 }
1249
1250 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1253 bitmask[1] & nfs4_fattr_bitmap[1],
1254 bitmask[2] & nfs4_fattr_bitmap[2],
1255 hdr);
1256 }
1257
1258 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1259 const u32 *open_bitmap,
1260 struct compound_hdr *hdr)
1261 {
1262 encode_getattr_three(xdr,
1263 bitmask[0] & open_bitmap[0],
1264 bitmask[1] & open_bitmap[1],
1265 bitmask[2] & open_bitmap[2],
1266 hdr);
1267 }
1268
1269 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1270 {
1271 encode_getattr_three(xdr,
1272 bitmask[0] & nfs4_fsinfo_bitmap[0],
1273 bitmask[1] & nfs4_fsinfo_bitmap[1],
1274 bitmask[2] & nfs4_fsinfo_bitmap[2],
1275 hdr);
1276 }
1277
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1281 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1282 }
1283
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292 encode_string(xdr, name->len, name->name);
1293 }
1294
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297 if (fl->fl_type == F_RDLCK)
1298 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304 if (fl->fl_end == OFFSET_MAX)
1305 return ~(uint64_t)0;
1306 return fl->fl_end - fl->fl_start + 1;
1307 }
1308
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311 __be32 *p;
1312
1313 p = reserve_space(xdr, 32);
1314 p = xdr_encode_hyper(p, lowner->clientid);
1315 *p++ = cpu_to_be32(20);
1316 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317 *p++ = cpu_to_be32(lowner->s_dev);
1318 xdr_encode_hyper(p, lowner->id);
1319 }
1320
1321 /*
1322 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324 */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327 __be32 *p;
1328
1329 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330 p = reserve_space(xdr, 28);
1331 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332 *p++ = cpu_to_be32(args->reclaim);
1333 p = xdr_encode_hyper(p, args->fl->fl_start);
1334 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 *p = cpu_to_be32(args->new_lock_owner);
1336 if (args->new_lock_owner){
1337 encode_nfs4_seqid(xdr, args->open_seqid);
1338 encode_nfs4_stateid(xdr, &args->open_stateid);
1339 encode_nfs4_seqid(xdr, args->lock_seqid);
1340 encode_lockowner(xdr, &args->lock_owner);
1341 }
1342 else {
1343 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344 encode_nfs4_seqid(xdr, args->lock_seqid);
1345 }
1346 }
1347
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350 __be32 *p;
1351
1352 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353 p = reserve_space(xdr, 20);
1354 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 encode_lockowner(xdr, &args->lock_owner);
1358 }
1359
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362 __be32 *p;
1363
1364 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366 encode_nfs4_seqid(xdr, args->seqid);
1367 encode_nfs4_stateid(xdr, &args->stateid);
1368 p = reserve_space(xdr, 16);
1369 p = xdr_encode_hyper(p, args->fl->fl_start);
1370 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376 encode_lockowner(xdr, lowner);
1377 }
1378
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382 encode_string(xdr, name->len, name->name);
1383 }
1384
1385 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386 {
1387 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388 }
1389
1390 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391 {
1392 __be32 *p;
1393
1394 p = reserve_space(xdr, 8);
1395 *p++ = cpu_to_be32(share_access);
1396 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1397 }
1398
1399 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401 __be32 *p;
1402 /*
1403 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404 * owner 4 = 32
1405 */
1406 encode_nfs4_seqid(xdr, arg->seqid);
1407 encode_share_access(xdr, arg->share_access);
1408 p = reserve_space(xdr, 36);
1409 p = xdr_encode_hyper(p, arg->clientid);
1410 *p++ = cpu_to_be32(24);
1411 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412 *p++ = cpu_to_be32(arg->server->s_dev);
1413 *p++ = cpu_to_be32(arg->id.uniquifier);
1414 xdr_encode_hyper(p, arg->id.create_time);
1415 }
1416
1417 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419 __be32 *p;
1420
1421 p = reserve_space(xdr, 4);
1422 switch(arg->createmode) {
1423 case NFS4_CREATE_UNCHECKED:
1424 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426 arg->server, arg->server->attr_bitmask);
1427 break;
1428 case NFS4_CREATE_GUARDED:
1429 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431 arg->server, arg->server->attr_bitmask);
1432 break;
1433 case NFS4_CREATE_EXCLUSIVE:
1434 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435 encode_nfs4_verifier(xdr, &arg->u.verifier);
1436 break;
1437 case NFS4_CREATE_EXCLUSIVE4_1:
1438 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439 encode_nfs4_verifier(xdr, &arg->u.verifier);
1440 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441 arg->server, arg->server->exclcreat_bitmask);
1442 }
1443 }
1444
1445 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446 {
1447 __be32 *p;
1448
1449 p = reserve_space(xdr, 4);
1450 switch (arg->open_flags & O_CREAT) {
1451 case 0:
1452 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453 break;
1454 default:
1455 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456 encode_createmode(xdr, arg);
1457 }
1458 }
1459
1460 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461 {
1462 __be32 *p;
1463
1464 p = reserve_space(xdr, 4);
1465 switch (delegation_type) {
1466 case 0:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468 break;
1469 case FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471 break;
1472 case FMODE_WRITE|FMODE_READ:
1473 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474 break;
1475 default:
1476 BUG();
1477 }
1478 }
1479
1480 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486 encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4);
1494 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495 encode_delegation_type(xdr, type);
1496 }
1497
1498 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499 {
1500 __be32 *p;
1501
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504 encode_nfs4_stateid(xdr, stateid);
1505 encode_string(xdr, name->len, name->name);
1506 }
1507
1508 static inline void encode_claim_fh(struct xdr_stream *xdr)
1509 {
1510 __be32 *p;
1511
1512 p = reserve_space(xdr, 4);
1513 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514 }
1515
1516 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517 {
1518 __be32 *p;
1519
1520 p = reserve_space(xdr, 4);
1521 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 encode_nfs4_stateid(xdr, stateid);
1523 }
1524
1525 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526 {
1527 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528 encode_openhdr(xdr, arg);
1529 encode_opentype(xdr, arg);
1530 switch (arg->claim) {
1531 case NFS4_OPEN_CLAIM_NULL:
1532 encode_claim_null(xdr, arg->name);
1533 break;
1534 case NFS4_OPEN_CLAIM_PREVIOUS:
1535 encode_claim_previous(xdr, arg->u.delegation_type);
1536 break;
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539 break;
1540 case NFS4_OPEN_CLAIM_FH:
1541 encode_claim_fh(xdr);
1542 break;
1543 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545 break;
1546 default:
1547 BUG();
1548 }
1549 }
1550
1551 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552 {
1553 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554 encode_nfs4_stateid(xdr, arg->stateid);
1555 encode_nfs4_seqid(xdr, arg->seqid);
1556 }
1557
1558 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559 {
1560 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561 encode_nfs4_stateid(xdr, &arg->stateid);
1562 encode_nfs4_seqid(xdr, arg->seqid);
1563 encode_share_access(xdr, arg->share_access);
1564 }
1565
1566 static void
1567 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568 {
1569 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570 encode_string(xdr, fh->size, fh->data);
1571 }
1572
1573 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574 {
1575 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576 }
1577
1578 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579 struct compound_hdr *hdr)
1580 {
1581 __be32 *p;
1582
1583 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584 encode_nfs4_stateid(xdr, &args->stateid);
1585
1586 p = reserve_space(xdr, 12);
1587 p = xdr_encode_hyper(p, args->offset);
1588 *p = cpu_to_be32(args->count);
1589 }
1590
1591 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592 {
1593 uint32_t attrs[3] = {
1594 FATTR4_WORD0_RDATTR_ERROR,
1595 FATTR4_WORD1_MOUNTED_ON_FILEID,
1596 };
1597 uint32_t dircount = readdir->count >> 1;
1598 __be32 *p, verf[2];
1599 uint32_t attrlen = 0;
1600 unsigned int i;
1601
1602 if (readdir->plus) {
1603 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610 dircount >>= 1;
1611 }
1612 /* Use mounted_on_fileid only if the server supports it */
1613 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614 attrs[0] |= FATTR4_WORD0_FILEID;
1615 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616 attrs[i] &= readdir->bitmask[i];
1617 if (attrs[i] != 0)
1618 attrlen = i+1;
1619 }
1620
1621 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622 encode_uint64(xdr, readdir->cookie);
1623 encode_nfs4_verifier(xdr, &readdir->verifier);
1624 p = reserve_space(xdr, 12 + (attrlen << 2));
1625 *p++ = cpu_to_be32(dircount);
1626 *p++ = cpu_to_be32(readdir->count);
1627 *p++ = cpu_to_be32(attrlen);
1628 for (i = 0; i < attrlen; i++)
1629 *p++ = cpu_to_be32(attrs[i]);
1630 memcpy(verf, readdir->verifier.data, sizeof(verf));
1631
1632 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633 __func__,
1634 (unsigned long long)readdir->cookie,
1635 verf[0], verf[1],
1636 attrs[0] & readdir->bitmask[0],
1637 attrs[1] & readdir->bitmask[1],
1638 attrs[2] & readdir->bitmask[2]);
1639 }
1640
1641 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644 }
1645
1646 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647 {
1648 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649 encode_string(xdr, name->len, name->name);
1650 }
1651
1652 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653 {
1654 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655 encode_string(xdr, oldname->len, oldname->name);
1656 encode_string(xdr, newname->len, newname->name);
1657 }
1658
1659 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660 struct compound_hdr *hdr)
1661 {
1662 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663 encode_uint64(xdr, clid);
1664 }
1665
1666 static void
1667 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670 }
1671
1672 static void
1673 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674 struct compound_hdr *hdr)
1675 {
1676 __be32 *p;
1677
1678 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679 encode_nfs4_stateid(xdr, &zero_stateid);
1680 p = reserve_space(xdr, 2*4);
1681 *p++ = cpu_to_be32(1);
1682 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683 p = reserve_space(xdr, 4);
1684 *p = cpu_to_be32(arg->acl_len);
1685 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686 }
1687
1688 static void
1689 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690 {
1691 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692 }
1693
1694 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695 {
1696 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697 encode_nfs4_stateid(xdr, &arg->stateid);
1698 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699 server->attr_bitmask);
1700 }
1701
1702 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703 {
1704 __be32 *p;
1705
1706 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708
1709 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710 setclientid->sc_clnt->cl_owner_id);
1711 p = reserve_space(xdr, 4);
1712 *p = cpu_to_be32(setclientid->sc_prog);
1713 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715 p = reserve_space(xdr, 4);
1716 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717 }
1718
1719 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722 decode_setclientid_confirm_maxsz, hdr);
1723 encode_uint64(xdr, arg->clientid);
1724 encode_nfs4_verifier(xdr, &arg->confirm);
1725 }
1726
1727 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728 struct compound_hdr *hdr)
1729 {
1730 __be32 *p;
1731
1732 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733 encode_nfs4_stateid(xdr, &args->stateid);
1734
1735 p = reserve_space(xdr, 16);
1736 p = xdr_encode_hyper(p, args->offset);
1737 *p++ = cpu_to_be32(args->stable);
1738 *p = cpu_to_be32(args->count);
1739
1740 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741 }
1742
1743 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744 {
1745 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746 encode_nfs4_stateid(xdr, stateid);
1747 }
1748
1749 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750 {
1751 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752 encode_string(xdr, name->len, name->name);
1753 }
1754
1755 #if defined(CONFIG_NFS_V4_1)
1756 /* NFSv4.1 operations */
1757 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758 const struct nfs41_bind_conn_to_session_args *args,
1759 struct compound_hdr *hdr)
1760 {
1761 __be32 *p;
1762
1763 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764 decode_bind_conn_to_session_maxsz, hdr);
1765 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766 p = xdr_reserve_space(xdr, 8);
1767 *p++ = cpu_to_be32(args->dir);
1768 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769 }
1770
1771 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772 {
1773 unsigned int i;
1774 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776 encode_uint32(xdr, op_map->u.words[i]);
1777 }
1778
1779 static void encode_exchange_id(struct xdr_stream *xdr,
1780 const struct nfs41_exchange_id_args *args,
1781 struct compound_hdr *hdr)
1782 {
1783 __be32 *p;
1784 char impl_name[IMPL_NAME_LIMIT];
1785 int len = 0;
1786
1787 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788 encode_nfs4_verifier(xdr, &args->verifier);
1789
1790 encode_string(xdr, strlen(args->client->cl_owner_id),
1791 args->client->cl_owner_id);
1792
1793 encode_uint32(xdr, args->flags);
1794 encode_uint32(xdr, args->state_protect.how);
1795
1796 switch (args->state_protect.how) {
1797 case SP4_NONE:
1798 break;
1799 case SP4_MACH_CRED:
1800 encode_op_map(xdr, &args->state_protect.enforce);
1801 encode_op_map(xdr, &args->state_protect.allow);
1802 break;
1803 default:
1804 WARN_ON_ONCE(1);
1805 break;
1806 }
1807
1808 if (send_implementation_id &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811 <= sizeof(impl_name) + 1)
1812 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813 utsname()->sysname, utsname()->release,
1814 utsname()->version, utsname()->machine);
1815
1816 if (len > 0) {
1817 encode_uint32(xdr, 1); /* implementation id array length=1 */
1818
1819 encode_string(xdr,
1820 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822 encode_string(xdr, len, impl_name);
1823 /* just send zeros for nii_date - the date is in nii_name */
1824 p = reserve_space(xdr, 12);
1825 p = xdr_encode_hyper(p, 0);
1826 *p = cpu_to_be32(0);
1827 } else
1828 encode_uint32(xdr, 0); /* implementation id array length=0 */
1829 }
1830
1831 static void encode_create_session(struct xdr_stream *xdr,
1832 const struct nfs41_create_session_args *args,
1833 struct compound_hdr *hdr)
1834 {
1835 __be32 *p;
1836 struct nfs_client *clp = args->client;
1837 struct rpc_clnt *clnt = clp->cl_rpcclient;
1838 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839 u32 max_resp_sz_cached;
1840
1841 /*
1842 * Assumes OPEN is the biggest non-idempotent compound.
1843 * 2 is the verifier.
1844 */
1845 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1846 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1847
1848 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850 p = xdr_encode_hyper(p, args->clientid);
1851 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1852 *p++ = cpu_to_be32(args->flags); /*flags */
1853
1854 /* Fore Channel */
1855 *p++ = cpu_to_be32(0); /* header padding size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1860 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1861 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1862
1863 /* Back Channel */
1864 *p++ = cpu_to_be32(0); /* header padding size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1869 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1870 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1871
1872 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1873 *p++ = cpu_to_be32(1);
1874 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1875
1876 /* authsys_parms rfc1831 */
1877 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879 *p++ = cpu_to_be32(0); /* UID */
1880 *p++ = cpu_to_be32(0); /* GID */
1881 *p = cpu_to_be32(0); /* No more gids */
1882 }
1883
1884 static void encode_destroy_session(struct xdr_stream *xdr,
1885 const struct nfs4_session *session,
1886 struct compound_hdr *hdr)
1887 {
1888 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890 }
1891
1892 static void encode_destroy_clientid(struct xdr_stream *xdr,
1893 uint64_t clientid,
1894 struct compound_hdr *hdr)
1895 {
1896 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897 encode_uint64(xdr, clientid);
1898 }
1899
1900 static void encode_reclaim_complete(struct xdr_stream *xdr,
1901 const struct nfs41_reclaim_complete_args *args,
1902 struct compound_hdr *hdr)
1903 {
1904 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905 encode_uint32(xdr, args->one_fs);
1906 }
1907 #endif /* CONFIG_NFS_V4_1 */
1908
1909 static void encode_sequence(struct xdr_stream *xdr,
1910 const struct nfs4_sequence_args *args,
1911 struct compound_hdr *hdr)
1912 {
1913 #if defined(CONFIG_NFS_V4_1)
1914 struct nfs4_session *session;
1915 struct nfs4_slot_table *tp;
1916 struct nfs4_slot *slot = args->sa_slot;
1917 __be32 *p;
1918
1919 tp = slot->table;
1920 session = tp->session;
1921 if (!session)
1922 return;
1923
1924 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925
1926 /*
1927 * Sessionid + seqid + slotid + max slotid + cache_this
1928 */
1929 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930 "max_slotid=%d cache_this=%d\n",
1931 __func__,
1932 ((u32 *)session->sess_id.data)[0],
1933 ((u32 *)session->sess_id.data)[1],
1934 ((u32 *)session->sess_id.data)[2],
1935 ((u32 *)session->sess_id.data)[3],
1936 slot->seq_nr, slot->slot_nr,
1937 tp->highest_used_slotid, args->sa_cache_this);
1938 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940 *p++ = cpu_to_be32(slot->seq_nr);
1941 *p++ = cpu_to_be32(slot->slot_nr);
1942 *p++ = cpu_to_be32(tp->highest_used_slotid);
1943 *p = cpu_to_be32(args->sa_cache_this);
1944 #endif /* CONFIG_NFS_V4_1 */
1945 }
1946
1947 #ifdef CONFIG_NFS_V4_1
1948 static void
1949 encode_getdeviceinfo(struct xdr_stream *xdr,
1950 const struct nfs4_getdeviceinfo_args *args,
1951 struct compound_hdr *hdr)
1952 {
1953 __be32 *p;
1954
1955 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958 NFS4_DEVICEID4_SIZE);
1959 *p++ = cpu_to_be32(args->pdev->layout_type);
1960 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1961
1962 p = reserve_space(xdr, 4 + 4);
1963 *p++ = cpu_to_be32(1); /* bitmap length */
1964 *p++ = cpu_to_be32(args->notify_types);
1965 }
1966
1967 static void
1968 encode_layoutget(struct xdr_stream *xdr,
1969 const struct nfs4_layoutget_args *args,
1970 struct compound_hdr *hdr)
1971 {
1972 __be32 *p;
1973
1974 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975 p = reserve_space(xdr, 36);
1976 *p++ = cpu_to_be32(0); /* Signal layout available */
1977 *p++ = cpu_to_be32(args->type);
1978 *p++ = cpu_to_be32(args->range.iomode);
1979 p = xdr_encode_hyper(p, args->range.offset);
1980 p = xdr_encode_hyper(p, args->range.length);
1981 p = xdr_encode_hyper(p, args->minlength);
1982 encode_nfs4_stateid(xdr, &args->stateid);
1983 encode_uint32(xdr, args->maxcount);
1984
1985 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986 __func__,
1987 args->type,
1988 args->range.iomode,
1989 (unsigned long)args->range.offset,
1990 (unsigned long)args->range.length,
1991 args->maxcount);
1992 }
1993
1994 static int
1995 encode_layoutcommit(struct xdr_stream *xdr,
1996 struct inode *inode,
1997 const struct nfs4_layoutcommit_args *args,
1998 struct compound_hdr *hdr)
1999 {
2000 __be32 *p;
2001
2002 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004
2005 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006 p = reserve_space(xdr, 20);
2007 /* Only whole file layouts */
2008 p = xdr_encode_hyper(p, 0); /* offset */
2009 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2010 *p = cpu_to_be32(0); /* reclaim */
2011 encode_nfs4_stateid(xdr, &args->stateid);
2012 if (args->lastbytewritten != U64_MAX) {
2013 p = reserve_space(xdr, 20);
2014 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015 p = xdr_encode_hyper(p, args->lastbytewritten);
2016 } else {
2017 p = reserve_space(xdr, 12);
2018 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019 }
2020 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022
2023 encode_uint32(xdr, args->layoutupdate_len);
2024 if (args->layoutupdate_pages)
2025 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026 args->layoutupdate_len);
2027
2028 return 0;
2029 }
2030
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033 const struct nfs4_layoutreturn_args *args,
2034 struct compound_hdr *hdr)
2035 {
2036 __be32 *p;
2037
2038 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039 p = reserve_space(xdr, 16);
2040 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2041 *p++ = cpu_to_be32(args->layout_type);
2042 *p++ = cpu_to_be32(args->range.iomode);
2043 *p = cpu_to_be32(RETURN_FILE);
2044 p = reserve_space(xdr, 16);
2045 p = xdr_encode_hyper(p, args->range.offset);
2046 p = xdr_encode_hyper(p, args->range.length);
2047 spin_lock(&args->inode->i_lock);
2048 encode_nfs4_stateid(xdr, &args->stateid);
2049 spin_unlock(&args->inode->i_lock);
2050 if (args->ld_private->ops && args->ld_private->ops->encode)
2051 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052 else
2053 encode_uint32(xdr, 0);
2054 }
2055
2056 static int
2057 encode_secinfo_no_name(struct xdr_stream *xdr,
2058 const struct nfs41_secinfo_no_name_args *args,
2059 struct compound_hdr *hdr)
2060 {
2061 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062 encode_uint32(xdr, args->style);
2063 return 0;
2064 }
2065
2066 static void encode_test_stateid(struct xdr_stream *xdr,
2067 const struct nfs41_test_stateid_args *args,
2068 struct compound_hdr *hdr)
2069 {
2070 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071 encode_uint32(xdr, 1);
2072 encode_nfs4_stateid(xdr, args->stateid);
2073 }
2074
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076 const struct nfs41_free_stateid_args *args,
2077 struct compound_hdr *hdr)
2078 {
2079 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080 encode_nfs4_stateid(xdr, &args->stateid);
2081 }
2082 #else
2083 static inline void
2084 encode_layoutreturn(struct xdr_stream *xdr,
2085 const struct nfs4_layoutreturn_args *args,
2086 struct compound_hdr *hdr)
2087 {
2088 }
2089 #endif /* CONFIG_NFS_V4_1 */
2090
2091 /*
2092 * END OF "GENERIC" ENCODE ROUTINES.
2093 */
2094
2095 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2096 {
2097 #if defined(CONFIG_NFS_V4_1)
2098 struct nfs4_session *session = args->sa_slot->table->session;
2099 if (session)
2100 return session->clp->cl_mvops->minor_version;
2101 #endif /* CONFIG_NFS_V4_1 */
2102 return 0;
2103 }
2104
2105 /*
2106 * Encode an ACCESS request
2107 */
2108 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2109 const void *data)
2110 {
2111 const struct nfs4_accessargs *args = data;
2112 struct compound_hdr hdr = {
2113 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114 };
2115
2116 encode_compound_hdr(xdr, req, &hdr);
2117 encode_sequence(xdr, &args->seq_args, &hdr);
2118 encode_putfh(xdr, args->fh, &hdr);
2119 encode_access(xdr, args->access, &hdr);
2120 encode_getfattr(xdr, args->bitmask, &hdr);
2121 encode_nops(&hdr);
2122 }
2123
2124 /*
2125 * Encode LOOKUP request
2126 */
2127 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2128 const void *data)
2129 {
2130 const struct nfs4_lookup_arg *args = data;
2131 struct compound_hdr hdr = {
2132 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133 };
2134
2135 encode_compound_hdr(xdr, req, &hdr);
2136 encode_sequence(xdr, &args->seq_args, &hdr);
2137 encode_putfh(xdr, args->dir_fh, &hdr);
2138 encode_lookup(xdr, args->name, &hdr);
2139 encode_getfh(xdr, &hdr);
2140 encode_getfattr(xdr, args->bitmask, &hdr);
2141 encode_nops(&hdr);
2142 }
2143
2144 /*
2145 * Encode LOOKUPP request
2146 */
2147 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2148 const void *data)
2149 {
2150 const struct nfs4_lookupp_arg *args = data;
2151 struct compound_hdr hdr = {
2152 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153 };
2154
2155 encode_compound_hdr(xdr, req, &hdr);
2156 encode_sequence(xdr, &args->seq_args, &hdr);
2157 encode_putfh(xdr, args->fh, &hdr);
2158 encode_lookupp(xdr, &hdr);
2159 encode_getfh(xdr, &hdr);
2160 encode_getfattr(xdr, args->bitmask, &hdr);
2161 encode_nops(&hdr);
2162 }
2163
2164 /*
2165 * Encode LOOKUP_ROOT request
2166 */
2167 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2168 struct xdr_stream *xdr,
2169 const void *data)
2170 {
2171 const struct nfs4_lookup_root_arg *args = data;
2172 struct compound_hdr hdr = {
2173 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2174 };
2175
2176 encode_compound_hdr(xdr, req, &hdr);
2177 encode_sequence(xdr, &args->seq_args, &hdr);
2178 encode_putrootfh(xdr, &hdr);
2179 encode_getfh(xdr, &hdr);
2180 encode_getfattr(xdr, args->bitmask, &hdr);
2181 encode_nops(&hdr);
2182 }
2183
2184 /*
2185 * Encode REMOVE request
2186 */
2187 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2188 const void *data)
2189 {
2190 const struct nfs_removeargs *args = data;
2191 struct compound_hdr hdr = {
2192 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193 };
2194
2195 encode_compound_hdr(xdr, req, &hdr);
2196 encode_sequence(xdr, &args->seq_args, &hdr);
2197 encode_putfh(xdr, args->fh, &hdr);
2198 encode_remove(xdr, &args->name, &hdr);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode RENAME request
2204 */
2205 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 const void *data)
2207 {
2208 const struct nfs_renameargs *args = data;
2209 struct compound_hdr hdr = {
2210 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211 };
2212
2213 encode_compound_hdr(xdr, req, &hdr);
2214 encode_sequence(xdr, &args->seq_args, &hdr);
2215 encode_putfh(xdr, args->old_dir, &hdr);
2216 encode_savefh(xdr, &hdr);
2217 encode_putfh(xdr, args->new_dir, &hdr);
2218 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode LINK request
2224 */
2225 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const void *data)
2227 {
2228 const struct nfs4_link_arg *args = data;
2229 struct compound_hdr hdr = {
2230 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231 };
2232
2233 encode_compound_hdr(xdr, req, &hdr);
2234 encode_sequence(xdr, &args->seq_args, &hdr);
2235 encode_putfh(xdr, args->fh, &hdr);
2236 encode_savefh(xdr, &hdr);
2237 encode_putfh(xdr, args->dir_fh, &hdr);
2238 encode_link(xdr, args->name, &hdr);
2239 encode_restorefh(xdr, &hdr);
2240 encode_getfattr(xdr, args->bitmask, &hdr);
2241 encode_nops(&hdr);
2242 }
2243
2244 /*
2245 * Encode CREATE request
2246 */
2247 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2248 const void *data)
2249 {
2250 const struct nfs4_create_arg *args = data;
2251 struct compound_hdr hdr = {
2252 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2253 };
2254
2255 encode_compound_hdr(xdr, req, &hdr);
2256 encode_sequence(xdr, &args->seq_args, &hdr);
2257 encode_putfh(xdr, args->dir_fh, &hdr);
2258 encode_create(xdr, args, &hdr);
2259 encode_getfh(xdr, &hdr);
2260 encode_getfattr(xdr, args->bitmask, &hdr);
2261 encode_nops(&hdr);
2262 }
2263
2264 /*
2265 * Encode SYMLINK request
2266 */
2267 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2268 const void *data)
2269 {
2270 const struct nfs4_create_arg *args = data;
2271
2272 nfs4_xdr_enc_create(req, xdr, args);
2273 }
2274
2275 /*
2276 * Encode GETATTR request
2277 */
2278 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2279 const void *data)
2280 {
2281 const struct nfs4_getattr_arg *args = data;
2282 struct compound_hdr hdr = {
2283 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284 };
2285
2286 encode_compound_hdr(xdr, req, &hdr);
2287 encode_sequence(xdr, &args->seq_args, &hdr);
2288 encode_putfh(xdr, args->fh, &hdr);
2289 encode_getfattr(xdr, args->bitmask, &hdr);
2290 encode_nops(&hdr);
2291 }
2292
2293 /*
2294 * Encode a CLOSE request
2295 */
2296 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2297 const void *data)
2298 {
2299 const struct nfs_closeargs *args = data;
2300 struct compound_hdr hdr = {
2301 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2302 };
2303
2304 encode_compound_hdr(xdr, req, &hdr);
2305 encode_sequence(xdr, &args->seq_args, &hdr);
2306 encode_putfh(xdr, args->fh, &hdr);
2307 if (args->lr_args)
2308 encode_layoutreturn(xdr, args->lr_args, &hdr);
2309 if (args->bitmask != NULL)
2310 encode_getfattr(xdr, args->bitmask, &hdr);
2311 encode_close(xdr, args, &hdr);
2312 encode_nops(&hdr);
2313 }
2314
2315 /*
2316 * Encode an OPEN request
2317 */
2318 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2319 const void *data)
2320 {
2321 const struct nfs_openargs *args = data;
2322 struct compound_hdr hdr = {
2323 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324 };
2325
2326 encode_compound_hdr(xdr, req, &hdr);
2327 encode_sequence(xdr, &args->seq_args, &hdr);
2328 encode_putfh(xdr, args->fh, &hdr);
2329 encode_open(xdr, args, &hdr);
2330 encode_getfh(xdr, &hdr);
2331 if (args->access)
2332 encode_access(xdr, args->access, &hdr);
2333 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2334 encode_nops(&hdr);
2335 }
2336
2337 /*
2338 * Encode an OPEN_CONFIRM request
2339 */
2340 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2341 struct xdr_stream *xdr,
2342 const void *data)
2343 {
2344 const struct nfs_open_confirmargs *args = data;
2345 struct compound_hdr hdr = {
2346 .nops = 0,
2347 };
2348
2349 encode_compound_hdr(xdr, req, &hdr);
2350 encode_putfh(xdr, args->fh, &hdr);
2351 encode_open_confirm(xdr, args, &hdr);
2352 encode_nops(&hdr);
2353 }
2354
2355 /*
2356 * Encode an OPEN request with no attributes.
2357 */
2358 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2359 struct xdr_stream *xdr,
2360 const void *data)
2361 {
2362 const struct nfs_openargs *args = data;
2363 struct compound_hdr hdr = {
2364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365 };
2366
2367 encode_compound_hdr(xdr, req, &hdr);
2368 encode_sequence(xdr, &args->seq_args, &hdr);
2369 encode_putfh(xdr, args->fh, &hdr);
2370 encode_open(xdr, args, &hdr);
2371 if (args->access)
2372 encode_access(xdr, args->access, &hdr);
2373 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode an OPEN_DOWNGRADE request
2379 */
2380 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2381 struct xdr_stream *xdr,
2382 const void *data)
2383 {
2384 const struct nfs_closeargs *args = data;
2385 struct compound_hdr hdr = {
2386 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387 };
2388
2389 encode_compound_hdr(xdr, req, &hdr);
2390 encode_sequence(xdr, &args->seq_args, &hdr);
2391 encode_putfh(xdr, args->fh, &hdr);
2392 if (args->lr_args)
2393 encode_layoutreturn(xdr, args->lr_args, &hdr);
2394 encode_open_downgrade(xdr, args, &hdr);
2395 encode_nops(&hdr);
2396 }
2397
2398 /*
2399 * Encode a LOCK request
2400 */
2401 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2402 const void *data)
2403 {
2404 const struct nfs_lock_args *args = data;
2405 struct compound_hdr hdr = {
2406 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407 };
2408
2409 encode_compound_hdr(xdr, req, &hdr);
2410 encode_sequence(xdr, &args->seq_args, &hdr);
2411 encode_putfh(xdr, args->fh, &hdr);
2412 encode_lock(xdr, args, &hdr);
2413 encode_nops(&hdr);
2414 }
2415
2416 /*
2417 * Encode a LOCKT request
2418 */
2419 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2420 const void *data)
2421 {
2422 const struct nfs_lockt_args *args = data;
2423 struct compound_hdr hdr = {
2424 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425 };
2426
2427 encode_compound_hdr(xdr, req, &hdr);
2428 encode_sequence(xdr, &args->seq_args, &hdr);
2429 encode_putfh(xdr, args->fh, &hdr);
2430 encode_lockt(xdr, args, &hdr);
2431 encode_nops(&hdr);
2432 }
2433
2434 /*
2435 * Encode a LOCKU request
2436 */
2437 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2438 const void *data)
2439 {
2440 const struct nfs_locku_args *args = data;
2441 struct compound_hdr hdr = {
2442 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443 };
2444
2445 encode_compound_hdr(xdr, req, &hdr);
2446 encode_sequence(xdr, &args->seq_args, &hdr);
2447 encode_putfh(xdr, args->fh, &hdr);
2448 encode_locku(xdr, args, &hdr);
2449 encode_nops(&hdr);
2450 }
2451
2452 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2453 struct xdr_stream *xdr,
2454 const void *data)
2455 {
2456 const struct nfs_release_lockowner_args *args = data;
2457 struct compound_hdr hdr = {
2458 .minorversion = 0,
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2463 encode_nops(&hdr);
2464 }
2465
2466 /*
2467 * Encode a READLINK request
2468 */
2469 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2470 const void *data)
2471 {
2472 const struct nfs4_readlink *args = data;
2473 struct compound_hdr hdr = {
2474 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475 };
2476
2477 encode_compound_hdr(xdr, req, &hdr);
2478 encode_sequence(xdr, &args->seq_args, &hdr);
2479 encode_putfh(xdr, args->fh, &hdr);
2480 encode_readlink(xdr, args, req, &hdr);
2481
2482 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2483 args->pgbase, args->pglen);
2484 encode_nops(&hdr);
2485 }
2486
2487 /*
2488 * Encode a READDIR request
2489 */
2490 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2491 const void *data)
2492 {
2493 const struct nfs4_readdir_arg *args = data;
2494 struct compound_hdr hdr = {
2495 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496 };
2497
2498 encode_compound_hdr(xdr, req, &hdr);
2499 encode_sequence(xdr, &args->seq_args, &hdr);
2500 encode_putfh(xdr, args->fh, &hdr);
2501 encode_readdir(xdr, args, req, &hdr);
2502
2503 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2504 args->pgbase, args->count);
2505 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2506 __func__, hdr.replen << 2, args->pages,
2507 args->pgbase, args->count);
2508 encode_nops(&hdr);
2509 }
2510
2511 /*
2512 * Encode a READ request
2513 */
2514 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2515 const void *data)
2516 {
2517 const struct nfs_pgio_args *args = data;
2518 struct compound_hdr hdr = {
2519 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520 };
2521
2522 encode_compound_hdr(xdr, req, &hdr);
2523 encode_sequence(xdr, &args->seq_args, &hdr);
2524 encode_putfh(xdr, args->fh, &hdr);
2525 encode_read(xdr, args, &hdr);
2526
2527 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2528 args->pages, args->pgbase, args->count);
2529 req->rq_rcv_buf.flags |= XDRBUF_READ;
2530 encode_nops(&hdr);
2531 }
2532
2533 /*
2534 * Encode an SETATTR request
2535 */
2536 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2537 const void *data)
2538 {
2539 const struct nfs_setattrargs *args = data;
2540 struct compound_hdr hdr = {
2541 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542 };
2543
2544 encode_compound_hdr(xdr, req, &hdr);
2545 encode_sequence(xdr, &args->seq_args, &hdr);
2546 encode_putfh(xdr, args->fh, &hdr);
2547 encode_setattr(xdr, args, args->server, &hdr);
2548 encode_getfattr(xdr, args->bitmask, &hdr);
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * Encode a GETACL request
2554 */
2555 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const void *data)
2557 {
2558 const struct nfs_getaclargs *args = data;
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562 uint32_t replen;
2563
2564 encode_compound_hdr(xdr, req, &hdr);
2565 encode_sequence(xdr, &args->seq_args, &hdr);
2566 encode_putfh(xdr, args->fh, &hdr);
2567 replen = hdr.replen + op_decode_hdr_maxsz;
2568 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2569
2570 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2571 args->acl_pages, 0, args->acl_len);
2572
2573 encode_nops(&hdr);
2574 }
2575
2576 /*
2577 * Encode a WRITE request
2578 */
2579 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2580 const void *data)
2581 {
2582 const struct nfs_pgio_args *args = data;
2583 struct compound_hdr hdr = {
2584 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585 };
2586
2587 encode_compound_hdr(xdr, req, &hdr);
2588 encode_sequence(xdr, &args->seq_args, &hdr);
2589 encode_putfh(xdr, args->fh, &hdr);
2590 encode_write(xdr, args, &hdr);
2591 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2592 if (args->bitmask)
2593 encode_getfattr(xdr, args->bitmask, &hdr);
2594 encode_nops(&hdr);
2595 }
2596
2597 /*
2598 * a COMMIT request
2599 */
2600 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2601 const void *data)
2602 {
2603 const struct nfs_commitargs *args = data;
2604 struct compound_hdr hdr = {
2605 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606 };
2607
2608 encode_compound_hdr(xdr, req, &hdr);
2609 encode_sequence(xdr, &args->seq_args, &hdr);
2610 encode_putfh(xdr, args->fh, &hdr);
2611 encode_commit(xdr, args, &hdr);
2612 encode_nops(&hdr);
2613 }
2614
2615 /*
2616 * FSINFO request
2617 */
2618 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2619 const void *data)
2620 {
2621 const struct nfs4_fsinfo_arg *args = data;
2622 struct compound_hdr hdr = {
2623 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624 };
2625
2626 encode_compound_hdr(xdr, req, &hdr);
2627 encode_sequence(xdr, &args->seq_args, &hdr);
2628 encode_putfh(xdr, args->fh, &hdr);
2629 encode_fsinfo(xdr, args->bitmask, &hdr);
2630 encode_nops(&hdr);
2631 }
2632
2633 /*
2634 * a PATHCONF request
2635 */
2636 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2637 const void *data)
2638 {
2639 const struct nfs4_pathconf_arg *args = data;
2640 struct compound_hdr hdr = {
2641 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642 };
2643
2644 encode_compound_hdr(xdr, req, &hdr);
2645 encode_sequence(xdr, &args->seq_args, &hdr);
2646 encode_putfh(xdr, args->fh, &hdr);
2647 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2648 &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * a STATFS request
2654 */
2655 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2656 const void *data)
2657 {
2658 const struct nfs4_statfs_arg *args = data;
2659 struct compound_hdr hdr = {
2660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_sequence(xdr, &args->seq_args, &hdr);
2665 encode_putfh(xdr, args->fh, &hdr);
2666 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2667 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * GETATTR_BITMAP request
2673 */
2674 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2675 struct xdr_stream *xdr,
2676 const void *data)
2677 {
2678 const struct nfs4_server_caps_arg *args = data;
2679 const u32 *bitmask = args->bitmask;
2680 struct compound_hdr hdr = {
2681 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682 };
2683
2684 encode_compound_hdr(xdr, req, &hdr);
2685 encode_sequence(xdr, &args->seq_args, &hdr);
2686 encode_putfh(xdr, args->fhandle, &hdr);
2687 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2688 encode_nops(&hdr);
2689 }
2690
2691 /*
2692 * a RENEW request
2693 */
2694 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2695 const void *data)
2696
2697 {
2698 const struct nfs_client *clp = data;
2699 struct compound_hdr hdr = {
2700 .nops = 0,
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_renew(xdr, clp->cl_clientid, &hdr);
2705 encode_nops(&hdr);
2706 }
2707
2708 /*
2709 * a SETCLIENTID request
2710 */
2711 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2712 struct xdr_stream *xdr,
2713 const void *data)
2714 {
2715 const struct nfs4_setclientid *sc = data;
2716 struct compound_hdr hdr = {
2717 .nops = 0,
2718 };
2719
2720 encode_compound_hdr(xdr, req, &hdr);
2721 encode_setclientid(xdr, sc, &hdr);
2722 encode_nops(&hdr);
2723 }
2724
2725 /*
2726 * a SETCLIENTID_CONFIRM request
2727 */
2728 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 const void *data)
2731 {
2732 const struct nfs4_setclientid_res *arg = data;
2733 struct compound_hdr hdr = {
2734 .nops = 0,
2735 };
2736
2737 encode_compound_hdr(xdr, req, &hdr);
2738 encode_setclientid_confirm(xdr, arg, &hdr);
2739 encode_nops(&hdr);
2740 }
2741
2742 /*
2743 * DELEGRETURN request
2744 */
2745 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2746 struct xdr_stream *xdr,
2747 const void *data)
2748 {
2749 const struct nfs4_delegreturnargs *args = data;
2750 struct compound_hdr hdr = {
2751 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752 };
2753
2754 encode_compound_hdr(xdr, req, &hdr);
2755 encode_sequence(xdr, &args->seq_args, &hdr);
2756 encode_putfh(xdr, args->fhandle, &hdr);
2757 if (args->lr_args)
2758 encode_layoutreturn(xdr, args->lr_args, &hdr);
2759 if (args->bitmask)
2760 encode_getfattr(xdr, args->bitmask, &hdr);
2761 encode_delegreturn(xdr, args->stateid, &hdr);
2762 encode_nops(&hdr);
2763 }
2764
2765 /*
2766 * Encode FS_LOCATIONS request
2767 */
2768 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2769 struct xdr_stream *xdr,
2770 const void *data)
2771 {
2772 const struct nfs4_fs_locations_arg *args = data;
2773 struct compound_hdr hdr = {
2774 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775 };
2776 uint32_t replen;
2777
2778 encode_compound_hdr(xdr, req, &hdr);
2779 encode_sequence(xdr, &args->seq_args, &hdr);
2780 if (args->migration) {
2781 encode_putfh(xdr, args->fh, &hdr);
2782 replen = hdr.replen;
2783 encode_fs_locations(xdr, args->bitmask, &hdr);
2784 if (args->renew)
2785 encode_renew(xdr, args->clientid, &hdr);
2786 } else {
2787 encode_putfh(xdr, args->dir_fh, &hdr);
2788 encode_lookup(xdr, args->name, &hdr);
2789 replen = hdr.replen;
2790 encode_fs_locations(xdr, args->bitmask, &hdr);
2791 }
2792
2793 /* Set up reply kvec to capture returned fs_locations array. */
2794 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2795 (struct page **)&args->page, 0, PAGE_SIZE);
2796 encode_nops(&hdr);
2797 }
2798
2799 /*
2800 * Encode SECINFO request
2801 */
2802 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2803 struct xdr_stream *xdr,
2804 const void *data)
2805 {
2806 const struct nfs4_secinfo_arg *args = data;
2807 struct compound_hdr hdr = {
2808 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2809 };
2810
2811 encode_compound_hdr(xdr, req, &hdr);
2812 encode_sequence(xdr, &args->seq_args, &hdr);
2813 encode_putfh(xdr, args->dir_fh, &hdr);
2814 encode_secinfo(xdr, args->name, &hdr);
2815 encode_nops(&hdr);
2816 }
2817
2818 /*
2819 * Encode FSID_PRESENT request
2820 */
2821 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 const void *data)
2824 {
2825 const struct nfs4_fsid_present_arg *args = data;
2826 struct compound_hdr hdr = {
2827 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2828 };
2829
2830 encode_compound_hdr(xdr, req, &hdr);
2831 encode_sequence(xdr, &args->seq_args, &hdr);
2832 encode_putfh(xdr, args->fh, &hdr);
2833 encode_getfh(xdr, &hdr);
2834 if (args->renew)
2835 encode_renew(xdr, args->clientid, &hdr);
2836 encode_nops(&hdr);
2837 }
2838
2839 #if defined(CONFIG_NFS_V4_1)
2840 /*
2841 * BIND_CONN_TO_SESSION request
2842 */
2843 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2844 struct xdr_stream *xdr,
2845 const void *data)
2846 {
2847 const struct nfs41_bind_conn_to_session_args *args = data;
2848 struct compound_hdr hdr = {
2849 .minorversion = args->client->cl_mvops->minor_version,
2850 };
2851
2852 encode_compound_hdr(xdr, req, &hdr);
2853 encode_bind_conn_to_session(xdr, args, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 /*
2858 * EXCHANGE_ID request
2859 */
2860 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2861 struct xdr_stream *xdr,
2862 const void *data)
2863 {
2864 const struct nfs41_exchange_id_args *args = data;
2865 struct compound_hdr hdr = {
2866 .minorversion = args->client->cl_mvops->minor_version,
2867 };
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_exchange_id(xdr, args, &hdr);
2871 encode_nops(&hdr);
2872 }
2873
2874 /*
2875 * a CREATE_SESSION request
2876 */
2877 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2878 struct xdr_stream *xdr,
2879 const void *data)
2880 {
2881 const struct nfs41_create_session_args *args = data;
2882 struct compound_hdr hdr = {
2883 .minorversion = args->client->cl_mvops->minor_version,
2884 };
2885
2886 encode_compound_hdr(xdr, req, &hdr);
2887 encode_create_session(xdr, args, &hdr);
2888 encode_nops(&hdr);
2889 }
2890
2891 /*
2892 * a DESTROY_SESSION request
2893 */
2894 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2895 struct xdr_stream *xdr,
2896 const void *data)
2897 {
2898 const struct nfs4_session *session = data;
2899 struct compound_hdr hdr = {
2900 .minorversion = session->clp->cl_mvops->minor_version,
2901 };
2902
2903 encode_compound_hdr(xdr, req, &hdr);
2904 encode_destroy_session(xdr, session, &hdr);
2905 encode_nops(&hdr);
2906 }
2907
2908 /*
2909 * a DESTROY_CLIENTID request
2910 */
2911 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2912 struct xdr_stream *xdr,
2913 const void *data)
2914 {
2915 const struct nfs_client *clp = data;
2916 struct compound_hdr hdr = {
2917 .minorversion = clp->cl_mvops->minor_version,
2918 };
2919
2920 encode_compound_hdr(xdr, req, &hdr);
2921 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2922 encode_nops(&hdr);
2923 }
2924
2925 /*
2926 * a SEQUENCE request
2927 */
2928 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2929 const void *data)
2930 {
2931 const struct nfs4_sequence_args *args = data;
2932 struct compound_hdr hdr = {
2933 .minorversion = nfs4_xdr_minorversion(args),
2934 };
2935
2936 encode_compound_hdr(xdr, req, &hdr);
2937 encode_sequence(xdr, args, &hdr);
2938 encode_nops(&hdr);
2939 }
2940
2941 /*
2942 * a GET_LEASE_TIME request
2943 */
2944 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2945 struct xdr_stream *xdr,
2946 const void *data)
2947 {
2948 const struct nfs4_get_lease_time_args *args = data;
2949 struct compound_hdr hdr = {
2950 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2951 };
2952 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, &args->la_seq_args, &hdr);
2956 encode_putrootfh(xdr, &hdr);
2957 encode_fsinfo(xdr, lease_bitmap, &hdr);
2958 encode_nops(&hdr);
2959 }
2960
2961 /*
2962 * a RECLAIM_COMPLETE request
2963 */
2964 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 const void *data)
2967 {
2968 const struct nfs41_reclaim_complete_args *args = data;
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2971 };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->seq_args, &hdr);
2975 encode_reclaim_complete(xdr, args, &hdr);
2976 encode_nops(&hdr);
2977 }
2978
2979 /*
2980 * Encode GETDEVICEINFO request
2981 */
2982 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2983 struct xdr_stream *xdr,
2984 const void *data)
2985 {
2986 const struct nfs4_getdeviceinfo_args *args = data;
2987 struct compound_hdr hdr = {
2988 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989 };
2990
2991 encode_compound_hdr(xdr, req, &hdr);
2992 encode_sequence(xdr, &args->seq_args, &hdr);
2993 encode_getdeviceinfo(xdr, args, &hdr);
2994
2995 /* set up reply kvec. Subtract notification bitmap max size (2)
2996 * so that notification bitmap is put in xdr_buf tail */
2997 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2998 args->pdev->pages, args->pdev->pgbase,
2999 args->pdev->pglen);
3000
3001 encode_nops(&hdr);
3002 }
3003
3004 /*
3005 * Encode LAYOUTGET request
3006 */
3007 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3008 struct xdr_stream *xdr,
3009 const void *data)
3010 {
3011 const struct nfs4_layoutget_args *args = data;
3012 struct compound_hdr hdr = {
3013 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014 };
3015
3016 encode_compound_hdr(xdr, req, &hdr);
3017 encode_sequence(xdr, &args->seq_args, &hdr);
3018 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3019 encode_layoutget(xdr, args, &hdr);
3020
3021 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3022 args->layout.pages, 0, args->layout.pglen);
3023
3024 encode_nops(&hdr);
3025 }
3026
3027 /*
3028 * Encode LAYOUTCOMMIT request
3029 */
3030 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3031 struct xdr_stream *xdr,
3032 const void *priv)
3033 {
3034 const struct nfs4_layoutcommit_args *args = priv;
3035 struct nfs4_layoutcommit_data *data =
3036 container_of(args, struct nfs4_layoutcommit_data, args);
3037 struct compound_hdr hdr = {
3038 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039 };
3040
3041 encode_compound_hdr(xdr, req, &hdr);
3042 encode_sequence(xdr, &args->seq_args, &hdr);
3043 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3044 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3045 encode_getfattr(xdr, args->bitmask, &hdr);
3046 encode_nops(&hdr);
3047 }
3048
3049 /*
3050 * Encode LAYOUTRETURN request
3051 */
3052 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3053 struct xdr_stream *xdr,
3054 const void *data)
3055 {
3056 const struct nfs4_layoutreturn_args *args = data;
3057 struct compound_hdr hdr = {
3058 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3059 };
3060
3061 encode_compound_hdr(xdr, req, &hdr);
3062 encode_sequence(xdr, &args->seq_args, &hdr);
3063 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3064 encode_layoutreturn(xdr, args, &hdr);
3065 encode_nops(&hdr);
3066 }
3067
3068 /*
3069 * Encode SECINFO_NO_NAME request
3070 */
3071 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3072 struct xdr_stream *xdr,
3073 const void *data)
3074 {
3075 const struct nfs41_secinfo_no_name_args *args = data;
3076 struct compound_hdr hdr = {
3077 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078 };
3079
3080 encode_compound_hdr(xdr, req, &hdr);
3081 encode_sequence(xdr, &args->seq_args, &hdr);
3082 encode_putrootfh(xdr, &hdr);
3083 encode_secinfo_no_name(xdr, args, &hdr);
3084 encode_nops(&hdr);
3085 }
3086
3087 /*
3088 * Encode TEST_STATEID request
3089 */
3090 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3091 struct xdr_stream *xdr,
3092 const void *data)
3093 {
3094 const struct nfs41_test_stateid_args *args = data;
3095 struct compound_hdr hdr = {
3096 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097 };
3098
3099 encode_compound_hdr(xdr, req, &hdr);
3100 encode_sequence(xdr, &args->seq_args, &hdr);
3101 encode_test_stateid(xdr, args, &hdr);
3102 encode_nops(&hdr);
3103 }
3104
3105 /*
3106 * Encode FREE_STATEID request
3107 */
3108 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3109 struct xdr_stream *xdr,
3110 const void *data)
3111 {
3112 const struct nfs41_free_stateid_args *args = data;
3113 struct compound_hdr hdr = {
3114 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3115 };
3116
3117 encode_compound_hdr(xdr, req, &hdr);
3118 encode_sequence(xdr, &args->seq_args, &hdr);
3119 encode_free_stateid(xdr, args, &hdr);
3120 encode_nops(&hdr);
3121 }
3122 #endif /* CONFIG_NFS_V4_1 */
3123
3124 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3125 {
3126 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3127 "Remaining buffer length is %tu words.\n",
3128 func, xdr->end - xdr->p);
3129 }
3130
3131 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3132 {
3133 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3134 NFS4_OPAQUE_LIMIT);
3135 if (unlikely(ret < 0)) {
3136 if (ret == -EBADMSG)
3137 print_overflow_msg(__func__, xdr);
3138 return -EIO;
3139 }
3140 *len = ret;
3141 return 0;
3142 }
3143
3144 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3145 {
3146 __be32 *p;
3147
3148 p = xdr_inline_decode(xdr, 8);
3149 if (unlikely(!p))
3150 goto out_overflow;
3151 hdr->status = be32_to_cpup(p++);
3152 hdr->taglen = be32_to_cpup(p);
3153
3154 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3155 if (unlikely(!p))
3156 goto out_overflow;
3157 hdr->tag = (char *)p;
3158 p += XDR_QUADLEN(hdr->taglen);
3159 hdr->nops = be32_to_cpup(p);
3160 if (unlikely(hdr->nops < 1))
3161 return nfs4_stat_to_errno(hdr->status);
3162 return 0;
3163 out_overflow:
3164 print_overflow_msg(__func__, xdr);
3165 return -EIO;
3166 }
3167
3168 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3169 int *nfs_retval)
3170 {
3171 __be32 *p;
3172 uint32_t opnum;
3173 int32_t nfserr;
3174
3175 p = xdr_inline_decode(xdr, 8);
3176 if (unlikely(!p))
3177 goto out_overflow;
3178 opnum = be32_to_cpup(p++);
3179 if (unlikely(opnum != expected))
3180 goto out_bad_operation;
3181 nfserr = be32_to_cpup(p);
3182 if (nfserr == NFS_OK)
3183 *nfs_retval = 0;
3184 else
3185 *nfs_retval = nfs4_stat_to_errno(nfserr);
3186 return true;
3187 out_bad_operation:
3188 dprintk("nfs: Server returned operation"
3189 " %d but we issued a request for %d\n",
3190 opnum, expected);
3191 *nfs_retval = -EREMOTEIO;
3192 return false;
3193 out_overflow:
3194 print_overflow_msg(__func__, xdr);
3195 *nfs_retval = -EIO;
3196 return false;
3197 }
3198
3199 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3200 {
3201 int retval;
3202
3203 __decode_op_hdr(xdr, expected, &retval);
3204 return retval;
3205 }
3206
3207 /* Dummy routine */
3208 static int decode_ace(struct xdr_stream *xdr, void *ace)
3209 {
3210 __be32 *p;
3211 unsigned int strlen;
3212 char *str;
3213
3214 p = xdr_inline_decode(xdr, 12);
3215 if (likely(p))
3216 return decode_opaque_inline(xdr, &strlen, &str);
3217 print_overflow_msg(__func__, xdr);
3218 return -EIO;
3219 }
3220
3221 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3222 {
3223 uint32_t bmlen;
3224 __be32 *p;
3225
3226 p = xdr_inline_decode(xdr, 4);
3227 if (unlikely(!p))
3228 goto out_overflow;
3229 bmlen = be32_to_cpup(p);
3230
3231 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3232 p = xdr_inline_decode(xdr, (bmlen << 2));
3233 if (unlikely(!p))
3234 goto out_overflow;
3235 if (bmlen > 0) {
3236 bitmap[0] = be32_to_cpup(p++);
3237 if (bmlen > 1) {
3238 bitmap[1] = be32_to_cpup(p++);
3239 if (bmlen > 2)
3240 bitmap[2] = be32_to_cpup(p);
3241 }
3242 }
3243 return 0;
3244 out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247 }
3248
3249 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3250 {
3251 __be32 *p;
3252
3253 p = xdr_inline_decode(xdr, 4);
3254 if (unlikely(!p))
3255 goto out_overflow;
3256 *attrlen = be32_to_cpup(p);
3257 *savep = xdr_stream_pos(xdr);
3258 return 0;
3259 out_overflow:
3260 print_overflow_msg(__func__, xdr);
3261 return -EIO;
3262 }
3263
3264 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265 {
3266 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267 int ret;
3268 ret = decode_attr_bitmap(xdr, bitmask);
3269 if (unlikely(ret < 0))
3270 return ret;
3271 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272 } else
3273 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275 bitmask[0], bitmask[1], bitmask[2]);
3276 return 0;
3277 }
3278
3279 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280 {
3281 __be32 *p;
3282 int ret = 0;
3283
3284 *type = 0;
3285 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286 return -EIO;
3287 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288 p = xdr_inline_decode(xdr, 4);
3289 if (unlikely(!p))
3290 goto out_overflow;
3291 *type = be32_to_cpup(p);
3292 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293 dprintk("%s: bad type %d\n", __func__, *type);
3294 return -EIO;
3295 }
3296 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297 ret = NFS_ATTR_FATTR_TYPE;
3298 }
3299 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300 return ret;
3301 out_overflow:
3302 print_overflow_msg(__func__, xdr);
3303 return -EIO;
3304 }
3305
3306 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3307 uint32_t *bitmap, uint32_t *type)
3308 {
3309 __be32 *p;
3310
3311 *type = 0;
3312 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3313 return -EIO;
3314 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3315 p = xdr_inline_decode(xdr, 4);
3316 if (unlikely(!p))
3317 goto out_overflow;
3318 *type = be32_to_cpup(p);
3319 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3320 }
3321 dprintk("%s: expire type=0x%x\n", __func__, *type);
3322 return 0;
3323 out_overflow:
3324 print_overflow_msg(__func__, xdr);
3325 return -EIO;
3326 }
3327
3328 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3329 {
3330 __be32 *p;
3331 int ret = 0;
3332
3333 *change = 0;
3334 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3335 return -EIO;
3336 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3337 p = xdr_inline_decode(xdr, 8);
3338 if (unlikely(!p))
3339 goto out_overflow;
3340 xdr_decode_hyper(p, change);
3341 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3342 ret = NFS_ATTR_FATTR_CHANGE;
3343 }
3344 dprintk("%s: change attribute=%Lu\n", __func__,
3345 (unsigned long long)*change);
3346 return ret;
3347 out_overflow:
3348 print_overflow_msg(__func__, xdr);
3349 return -EIO;
3350 }
3351
3352 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3353 {
3354 __be32 *p;
3355 int ret = 0;
3356
3357 *size = 0;
3358 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3359 return -EIO;
3360 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3361 p = xdr_inline_decode(xdr, 8);
3362 if (unlikely(!p))
3363 goto out_overflow;
3364 xdr_decode_hyper(p, size);
3365 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3366 ret = NFS_ATTR_FATTR_SIZE;
3367 }
3368 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3369 return ret;
3370 out_overflow:
3371 print_overflow_msg(__func__, xdr);
3372 return -EIO;
3373 }
3374
3375 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3376 {
3377 __be32 *p;
3378
3379 *res = 0;
3380 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3381 return -EIO;
3382 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3383 p = xdr_inline_decode(xdr, 4);
3384 if (unlikely(!p))
3385 goto out_overflow;
3386 *res = be32_to_cpup(p);
3387 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3388 }
3389 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3390 return 0;
3391 out_overflow:
3392 print_overflow_msg(__func__, xdr);
3393 return -EIO;
3394 }
3395
3396 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3397 {
3398 __be32 *p;
3399
3400 *res = 0;
3401 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3402 return -EIO;
3403 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3404 p = xdr_inline_decode(xdr, 4);
3405 if (unlikely(!p))
3406 goto out_overflow;
3407 *res = be32_to_cpup(p);
3408 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3409 }
3410 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3411 return 0;
3412 out_overflow:
3413 print_overflow_msg(__func__, xdr);
3414 return -EIO;
3415 }
3416
3417 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3418 {
3419 __be32 *p;
3420 int ret = 0;
3421
3422 fsid->major = 0;
3423 fsid->minor = 0;
3424 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3425 return -EIO;
3426 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3427 p = xdr_inline_decode(xdr, 16);
3428 if (unlikely(!p))
3429 goto out_overflow;
3430 p = xdr_decode_hyper(p, &fsid->major);
3431 xdr_decode_hyper(p, &fsid->minor);
3432 bitmap[0] &= ~FATTR4_WORD0_FSID;
3433 ret = NFS_ATTR_FATTR_FSID;
3434 }
3435 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3436 (unsigned long long)fsid->major,
3437 (unsigned long long)fsid->minor);
3438 return ret;
3439 out_overflow:
3440 print_overflow_msg(__func__, xdr);
3441 return -EIO;
3442 }
3443
3444 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3445 {
3446 __be32 *p;
3447
3448 *res = 60;
3449 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3450 return -EIO;
3451 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3452 p = xdr_inline_decode(xdr, 4);
3453 if (unlikely(!p))
3454 goto out_overflow;
3455 *res = be32_to_cpup(p);
3456 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3457 }
3458 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3459 return 0;
3460 out_overflow:
3461 print_overflow_msg(__func__, xdr);
3462 return -EIO;
3463 }
3464
3465 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3466 {
3467 __be32 *p;
3468
3469 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3470 return -EIO;
3471 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3472 p = xdr_inline_decode(xdr, 4);
3473 if (unlikely(!p))
3474 goto out_overflow;
3475 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3476 *res = -be32_to_cpup(p);
3477 }
3478 return 0;
3479 out_overflow:
3480 print_overflow_msg(__func__, xdr);
3481 return -EIO;
3482 }
3483
3484 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3485 uint32_t *bitmap, uint32_t *bitmask)
3486 {
3487 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3488 int ret;
3489 ret = decode_attr_bitmap(xdr, bitmask);
3490 if (unlikely(ret < 0))
3491 return ret;
3492 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3493 } else
3494 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3495 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3496 bitmask[0], bitmask[1], bitmask[2]);
3497 return 0;
3498 }
3499
3500 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3501 {
3502 __be32 *p;
3503 int len;
3504
3505 if (fh != NULL)
3506 memset(fh, 0, sizeof(*fh));
3507
3508 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3509 return -EIO;
3510 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3511 p = xdr_inline_decode(xdr, 4);
3512 if (unlikely(!p))
3513 goto out_overflow;
3514 len = be32_to_cpup(p);
3515 if (len > NFS4_FHSIZE)
3516 return -EIO;
3517 p = xdr_inline_decode(xdr, len);
3518 if (unlikely(!p))
3519 goto out_overflow;
3520 if (fh != NULL) {
3521 memcpy(fh->data, p, len);
3522 fh->size = len;
3523 }
3524 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3525 }
3526 return 0;
3527 out_overflow:
3528 print_overflow_msg(__func__, xdr);
3529 return -EIO;
3530 }
3531
3532 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3533 {
3534 __be32 *p;
3535
3536 *res = 0;
3537 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3538 return -EIO;
3539 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3540 p = xdr_inline_decode(xdr, 4);
3541 if (unlikely(!p))
3542 goto out_overflow;
3543 *res = be32_to_cpup(p);
3544 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3545 }
3546 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3547 return 0;
3548 out_overflow:
3549 print_overflow_msg(__func__, xdr);
3550 return -EIO;
3551 }
3552
3553 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554 {
3555 __be32 *p;
3556 int ret = 0;
3557
3558 *fileid = 0;
3559 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3560 return -EIO;
3561 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3562 p = xdr_inline_decode(xdr, 8);
3563 if (unlikely(!p))
3564 goto out_overflow;
3565 xdr_decode_hyper(p, fileid);
3566 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3567 ret = NFS_ATTR_FATTR_FILEID;
3568 }
3569 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570 return ret;
3571 out_overflow:
3572 print_overflow_msg(__func__, xdr);
3573 return -EIO;
3574 }
3575
3576 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3577 {
3578 __be32 *p;
3579 int ret = 0;
3580
3581 *fileid = 0;
3582 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3583 return -EIO;
3584 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3585 p = xdr_inline_decode(xdr, 8);
3586 if (unlikely(!p))
3587 goto out_overflow;
3588 xdr_decode_hyper(p, fileid);
3589 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3590 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3591 }
3592 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3593 return ret;
3594 out_overflow:
3595 print_overflow_msg(__func__, xdr);
3596 return -EIO;
3597 }
3598
3599 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3600 {
3601 __be32 *p;
3602 int status = 0;
3603
3604 *res = 0;
3605 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3606 return -EIO;
3607 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3608 p = xdr_inline_decode(xdr, 8);
3609 if (unlikely(!p))
3610 goto out_overflow;
3611 xdr_decode_hyper(p, res);
3612 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3613 }
3614 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3615 return status;
3616 out_overflow:
3617 print_overflow_msg(__func__, xdr);
3618 return -EIO;
3619 }
3620
3621 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3622 {
3623 __be32 *p;
3624 int status = 0;
3625
3626 *res = 0;
3627 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3628 return -EIO;
3629 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3630 p = xdr_inline_decode(xdr, 8);
3631 if (unlikely(!p))
3632 goto out_overflow;
3633 xdr_decode_hyper(p, res);
3634 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3635 }
3636 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3637 return status;
3638 out_overflow:
3639 print_overflow_msg(__func__, xdr);
3640 return -EIO;
3641 }
3642
3643 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3644 {
3645 __be32 *p;
3646 int status = 0;
3647
3648 *res = 0;
3649 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3650 return -EIO;
3651 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3652 p = xdr_inline_decode(xdr, 8);
3653 if (unlikely(!p))
3654 goto out_overflow;
3655 xdr_decode_hyper(p, res);
3656 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3657 }
3658 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3659 return status;
3660 out_overflow:
3661 print_overflow_msg(__func__, xdr);
3662 return -EIO;
3663 }
3664
3665 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3666 {
3667 u32 n;
3668 __be32 *p;
3669 int status = 0;
3670
3671 p = xdr_inline_decode(xdr, 4);
3672 if (unlikely(!p))
3673 goto out_overflow;
3674 n = be32_to_cpup(p);
3675 if (n == 0)
3676 goto root_path;
3677 dprintk("pathname4: ");
3678 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3679 dprintk("cannot parse %d components in path\n", n);
3680 goto out_eio;
3681 }
3682 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3683 struct nfs4_string *component = &path->components[path->ncomponents];
3684 status = decode_opaque_inline(xdr, &component->len, &component->data);
3685 if (unlikely(status != 0))
3686 goto out_eio;
3687 ifdebug (XDR)
3688 pr_cont("%s%.*s ",
3689 (path->ncomponents != n ? "/ " : ""),
3690 component->len, component->data);
3691 }
3692 out:
3693 return status;
3694 root_path:
3695 /* a root pathname is sent as a zero component4 */
3696 path->ncomponents = 1;
3697 path->components[0].len=0;
3698 path->components[0].data=NULL;
3699 dprintk("pathname4: /\n");
3700 goto out;
3701 out_eio:
3702 dprintk(" status %d", status);
3703 status = -EIO;
3704 goto out;
3705 out_overflow:
3706 print_overflow_msg(__func__, xdr);
3707 return -EIO;
3708 }
3709
3710 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3711 {
3712 int n;
3713 __be32 *p;
3714 int status = -EIO;
3715
3716 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3717 goto out;
3718 status = 0;
3719 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3720 goto out;
3721 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3722 status = -EIO;
3723 /* Ignore borken servers that return unrequested attrs */
3724 if (unlikely(res == NULL))
3725 goto out;
3726 dprintk("%s: fsroot:\n", __func__);
3727 status = decode_pathname(xdr, &res->fs_path);
3728 if (unlikely(status != 0))
3729 goto out;
3730 p = xdr_inline_decode(xdr, 4);
3731 if (unlikely(!p))
3732 goto out_overflow;
3733 n = be32_to_cpup(p);
3734 if (n <= 0)
3735 goto out_eio;
3736 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3737 u32 m;
3738 struct nfs4_fs_location *loc;
3739
3740 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3741 break;
3742 loc = &res->locations[res->nlocations];
3743 p = xdr_inline_decode(xdr, 4);
3744 if (unlikely(!p))
3745 goto out_overflow;
3746 m = be32_to_cpup(p);
3747
3748 dprintk("%s: servers:\n", __func__);
3749 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3750 struct nfs4_string *server;
3751
3752 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3753 unsigned int i;
3754 dprintk("%s: using first %u of %u servers "
3755 "returned for location %u\n",
3756 __func__,
3757 NFS4_FS_LOCATION_MAXSERVERS,
3758 m, res->nlocations);
3759 for (i = loc->nservers; i < m; i++) {
3760 unsigned int len;
3761 char *data;
3762 status = decode_opaque_inline(xdr, &len, &data);
3763 if (unlikely(status != 0))
3764 goto out_eio;
3765 }
3766 break;
3767 }
3768 server = &loc->servers[loc->nservers];
3769 status = decode_opaque_inline(xdr, &server->len, &server->data);
3770 if (unlikely(status != 0))
3771 goto out_eio;
3772 dprintk("%s ", server->data);
3773 }
3774 status = decode_pathname(xdr, &loc->rootpath);
3775 if (unlikely(status != 0))
3776 goto out_eio;
3777 }
3778 if (res->nlocations != 0)
3779 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3780 out:
3781 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3782 return status;
3783 out_overflow:
3784 print_overflow_msg(__func__, xdr);
3785 out_eio:
3786 status = -EIO;
3787 goto out;
3788 }
3789
3790 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3791 {
3792 __be32 *p;
3793 int status = 0;
3794
3795 *res = 0;
3796 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3799 p = xdr_inline_decode(xdr, 8);
3800 if (unlikely(!p))
3801 goto out_overflow;
3802 xdr_decode_hyper(p, res);
3803 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3804 }
3805 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3806 return status;
3807 out_overflow:
3808 print_overflow_msg(__func__, xdr);
3809 return -EIO;
3810 }
3811
3812 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3813 {
3814 __be32 *p;
3815 int status = 0;
3816
3817 *maxlink = 1;
3818 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3819 return -EIO;
3820 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3821 p = xdr_inline_decode(xdr, 4);
3822 if (unlikely(!p))
3823 goto out_overflow;
3824 *maxlink = be32_to_cpup(p);
3825 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3826 }
3827 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3828 return status;
3829 out_overflow:
3830 print_overflow_msg(__func__, xdr);
3831 return -EIO;
3832 }
3833
3834 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3835 {
3836 __be32 *p;
3837 int status = 0;
3838
3839 *maxname = 1024;
3840 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3841 return -EIO;
3842 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3843 p = xdr_inline_decode(xdr, 4);
3844 if (unlikely(!p))
3845 goto out_overflow;
3846 *maxname = be32_to_cpup(p);
3847 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3848 }
3849 dprintk("%s: maxname=%u\n", __func__, *maxname);
3850 return status;
3851 out_overflow:
3852 print_overflow_msg(__func__, xdr);
3853 return -EIO;
3854 }
3855
3856 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3857 {
3858 __be32 *p;
3859 int status = 0;
3860
3861 *res = 1024;
3862 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3863 return -EIO;
3864 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3865 uint64_t maxread;
3866 p = xdr_inline_decode(xdr, 8);
3867 if (unlikely(!p))
3868 goto out_overflow;
3869 xdr_decode_hyper(p, &maxread);
3870 if (maxread > 0x7FFFFFFF)
3871 maxread = 0x7FFFFFFF;
3872 *res = (uint32_t)maxread;
3873 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3874 }
3875 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3876 return status;
3877 out_overflow:
3878 print_overflow_msg(__func__, xdr);
3879 return -EIO;
3880 }
3881
3882 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3883 {
3884 __be32 *p;
3885 int status = 0;
3886
3887 *res = 1024;
3888 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3889 return -EIO;
3890 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3891 uint64_t maxwrite;
3892 p = xdr_inline_decode(xdr, 8);
3893 if (unlikely(!p))
3894 goto out_overflow;
3895 xdr_decode_hyper(p, &maxwrite);
3896 if (maxwrite > 0x7FFFFFFF)
3897 maxwrite = 0x7FFFFFFF;
3898 *res = (uint32_t)maxwrite;
3899 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3900 }
3901 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3902 return status;
3903 out_overflow:
3904 print_overflow_msg(__func__, xdr);
3905 return -EIO;
3906 }
3907
3908 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3909 {
3910 uint32_t tmp;
3911 __be32 *p;
3912 int ret = 0;
3913
3914 *mode = 0;
3915 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3916 return -EIO;
3917 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3918 p = xdr_inline_decode(xdr, 4);
3919 if (unlikely(!p))
3920 goto out_overflow;
3921 tmp = be32_to_cpup(p);
3922 *mode = tmp & ~S_IFMT;
3923 bitmap[1] &= ~FATTR4_WORD1_MODE;
3924 ret = NFS_ATTR_FATTR_MODE;
3925 }
3926 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3927 return ret;
3928 out_overflow:
3929 print_overflow_msg(__func__, xdr);
3930 return -EIO;
3931 }
3932
3933 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3934 {
3935 __be32 *p;
3936 int ret = 0;
3937
3938 *nlink = 1;
3939 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3940 return -EIO;
3941 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3942 p = xdr_inline_decode(xdr, 4);
3943 if (unlikely(!p))
3944 goto out_overflow;
3945 *nlink = be32_to_cpup(p);
3946 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3947 ret = NFS_ATTR_FATTR_NLINK;
3948 }
3949 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3950 return ret;
3951 out_overflow:
3952 print_overflow_msg(__func__, xdr);
3953 return -EIO;
3954 }
3955
3956 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3957 struct nfs4_string *name, gfp_t gfp_flags)
3958 {
3959 ssize_t ret;
3960
3961 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3962 XDR_MAX_NETOBJ, gfp_flags);
3963 name->len = 0;
3964 if (ret > 0)
3965 name->len = ret;
3966 return ret;
3967 }
3968
3969 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3970 const struct nfs_server *server, kuid_t *uid,
3971 struct nfs4_string *owner_name)
3972 {
3973 ssize_t len;
3974 char *p;
3975
3976 *uid = make_kuid(&init_user_ns, -2);
3977 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3978 return -EIO;
3979 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3980 return 0;
3981 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3982
3983 if (owner_name != NULL) {
3984 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3985 if (len <= 0)
3986 goto out;
3987 dprintk("%s: name=%s\n", __func__, owner_name->data);
3988 return NFS_ATTR_FATTR_OWNER_NAME;
3989 } else {
3990 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3991 XDR_MAX_NETOBJ);
3992 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3993 goto out;
3994 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3995 return NFS_ATTR_FATTR_OWNER;
3996 }
3997 out:
3998 if (len != -EBADMSG)
3999 return 0;
4000 print_overflow_msg(__func__, xdr);
4001 return -EIO;
4002 }
4003
4004 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4005 const struct nfs_server *server, kgid_t *gid,
4006 struct nfs4_string *group_name)
4007 {
4008 ssize_t len;
4009 char *p;
4010
4011 *gid = make_kgid(&init_user_ns, -2);
4012 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4013 return -EIO;
4014 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4015 return 0;
4016 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4017
4018 if (group_name != NULL) {
4019 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
4020 if (len <= 0)
4021 goto out;
4022 dprintk("%s: name=%s\n", __func__, group_name->data);
4023 return NFS_ATTR_FATTR_GROUP_NAME;
4024 } else {
4025 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4026 XDR_MAX_NETOBJ);
4027 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4028 goto out;
4029 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4030 return NFS_ATTR_FATTR_GROUP;
4031 }
4032 out:
4033 if (len != -EBADMSG)
4034 return 0;
4035 print_overflow_msg(__func__, xdr);
4036 return -EIO;
4037 }
4038
4039 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4040 {
4041 uint32_t major = 0, minor = 0;
4042 __be32 *p;
4043 int ret = 0;
4044
4045 *rdev = MKDEV(0,0);
4046 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4047 return -EIO;
4048 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4049 dev_t tmp;
4050
4051 p = xdr_inline_decode(xdr, 8);
4052 if (unlikely(!p))
4053 goto out_overflow;
4054 major = be32_to_cpup(p++);
4055 minor = be32_to_cpup(p);
4056 tmp = MKDEV(major, minor);
4057 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4058 *rdev = tmp;
4059 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4060 ret = NFS_ATTR_FATTR_RDEV;
4061 }
4062 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4063 return ret;
4064 out_overflow:
4065 print_overflow_msg(__func__, xdr);
4066 return -EIO;
4067 }
4068
4069 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4070 {
4071 __be32 *p;
4072 int status = 0;
4073
4074 *res = 0;
4075 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4076 return -EIO;
4077 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4078 p = xdr_inline_decode(xdr, 8);
4079 if (unlikely(!p))
4080 goto out_overflow;
4081 xdr_decode_hyper(p, res);
4082 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4083 }
4084 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4085 return status;
4086 out_overflow:
4087 print_overflow_msg(__func__, xdr);
4088 return -EIO;
4089 }
4090
4091 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4092 {
4093 __be32 *p;
4094 int status = 0;
4095
4096 *res = 0;
4097 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4098 return -EIO;
4099 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4100 p = xdr_inline_decode(xdr, 8);
4101 if (unlikely(!p))
4102 goto out_overflow;
4103 xdr_decode_hyper(p, res);
4104 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4105 }
4106 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4107 return status;
4108 out_overflow:
4109 print_overflow_msg(__func__, xdr);
4110 return -EIO;
4111 }
4112
4113 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4114 {
4115 __be32 *p;
4116 int status = 0;
4117
4118 *res = 0;
4119 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4120 return -EIO;
4121 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4122 p = xdr_inline_decode(xdr, 8);
4123 if (unlikely(!p))
4124 goto out_overflow;
4125 xdr_decode_hyper(p, res);
4126 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4127 }
4128 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4129 return status;
4130 out_overflow:
4131 print_overflow_msg(__func__, xdr);
4132 return -EIO;
4133 }
4134
4135 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4136 {
4137 __be32 *p;
4138 int ret = 0;
4139
4140 *used = 0;
4141 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4142 return -EIO;
4143 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4144 p = xdr_inline_decode(xdr, 8);
4145 if (unlikely(!p))
4146 goto out_overflow;
4147 xdr_decode_hyper(p, used);
4148 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4149 ret = NFS_ATTR_FATTR_SPACE_USED;
4150 }
4151 dprintk("%s: space used=%Lu\n", __func__,
4152 (unsigned long long)*used);
4153 return ret;
4154 out_overflow:
4155 print_overflow_msg(__func__, xdr);
4156 return -EIO;
4157 }
4158
4159 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4160 {
4161 __be32 *p;
4162 uint64_t sec;
4163 uint32_t nsec;
4164
4165 p = xdr_inline_decode(xdr, 12);
4166 if (unlikely(!p))
4167 goto out_overflow;
4168 p = xdr_decode_hyper(p, &sec);
4169 nsec = be32_to_cpup(p);
4170 time->tv_sec = (time_t)sec;
4171 time->tv_nsec = (long)nsec;
4172 return 0;
4173 out_overflow:
4174 print_overflow_msg(__func__, xdr);
4175 return -EIO;
4176 }
4177
4178 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4179 {
4180 int status = 0;
4181
4182 time->tv_sec = 0;
4183 time->tv_nsec = 0;
4184 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4185 return -EIO;
4186 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4187 status = decode_attr_time(xdr, time);
4188 if (status == 0)
4189 status = NFS_ATTR_FATTR_ATIME;
4190 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4191 }
4192 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4193 return status;
4194 }
4195
4196 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4197 {
4198 int status = 0;
4199
4200 time->tv_sec = 0;
4201 time->tv_nsec = 0;
4202 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4203 return -EIO;
4204 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4205 status = decode_attr_time(xdr, time);
4206 if (status == 0)
4207 status = NFS_ATTR_FATTR_CTIME;
4208 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4209 }
4210 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4211 return status;
4212 }
4213
4214 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4215 struct timespec *time)
4216 {
4217 int status = 0;
4218
4219 time->tv_sec = 0;
4220 time->tv_nsec = 0;
4221 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4222 return -EIO;
4223 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4224 status = decode_attr_time(xdr, time);
4225 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4226 }
4227 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4228 (long)time->tv_nsec);
4229 return status;
4230 }
4231
4232 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4233 struct nfs4_label *label)
4234 {
4235 uint32_t pi = 0;
4236 uint32_t lfs = 0;
4237 __u32 len;
4238 __be32 *p;
4239 int status = 0;
4240
4241 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4242 return -EIO;
4243 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4244 p = xdr_inline_decode(xdr, 4);
4245 if (unlikely(!p))
4246 goto out_overflow;
4247 lfs = be32_to_cpup(p++);
4248 p = xdr_inline_decode(xdr, 4);
4249 if (unlikely(!p))
4250 goto out_overflow;
4251 pi = be32_to_cpup(p++);
4252 p = xdr_inline_decode(xdr, 4);
4253 if (unlikely(!p))
4254 goto out_overflow;
4255 len = be32_to_cpup(p++);
4256 p = xdr_inline_decode(xdr, len);
4257 if (unlikely(!p))
4258 goto out_overflow;
4259 if (len < NFS4_MAXLABELLEN) {
4260 if (label) {
4261 memcpy(label->label, p, len);
4262 label->len = len;
4263 label->pi = pi;
4264 label->lfs = lfs;
4265 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4266 }
4267 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4268 } else
4269 printk(KERN_WARNING "%s: label too long (%u)!\n",
4270 __func__, len);
4271 }
4272 if (label && label->label)
4273 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4274 (char *)label->label, label->len, label->pi, label->lfs);
4275 return status;
4276
4277 out_overflow:
4278 print_overflow_msg(__func__, xdr);
4279 return -EIO;
4280 }
4281
4282 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4283 {
4284 int status = 0;
4285
4286 time->tv_sec = 0;
4287 time->tv_nsec = 0;
4288 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4289 return -EIO;
4290 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4291 status = decode_attr_time(xdr, time);
4292 if (status == 0)
4293 status = NFS_ATTR_FATTR_MTIME;
4294 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4295 }
4296 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4297 return status;
4298 }
4299
4300 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4301 {
4302 unsigned int attrwords = XDR_QUADLEN(attrlen);
4303 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4304
4305 if (unlikely(attrwords != nwords)) {
4306 dprintk("%s: server returned incorrect attribute length: "
4307 "%u %c %u\n",
4308 __func__,
4309 attrwords << 2,
4310 (attrwords < nwords) ? '<' : '>',
4311 nwords << 2);
4312 return -EIO;
4313 }
4314 return 0;
4315 }
4316
4317 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4318 {
4319 __be32 *p;
4320
4321 p = xdr_inline_decode(xdr, 20);
4322 if (unlikely(!p))
4323 goto out_overflow;
4324 cinfo->atomic = be32_to_cpup(p++);
4325 p = xdr_decode_hyper(p, &cinfo->before);
4326 xdr_decode_hyper(p, &cinfo->after);
4327 return 0;
4328 out_overflow:
4329 print_overflow_msg(__func__, xdr);
4330 return -EIO;
4331 }
4332
4333 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4334 {
4335 __be32 *p;
4336 uint32_t supp, acc;
4337 int status;
4338
4339 status = decode_op_hdr(xdr, OP_ACCESS);
4340 if (status)
4341 return status;
4342 p = xdr_inline_decode(xdr, 8);
4343 if (unlikely(!p))
4344 goto out_overflow;
4345 supp = be32_to_cpup(p++);
4346 acc = be32_to_cpup(p);
4347 *supported = supp;
4348 *access = acc;
4349 return 0;
4350 out_overflow:
4351 print_overflow_msg(__func__, xdr);
4352 return -EIO;
4353 }
4354
4355 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4356 {
4357 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4358 if (unlikely(ret < 0)) {
4359 print_overflow_msg(__func__, xdr);
4360 return -EIO;
4361 }
4362 return 0;
4363 }
4364
4365 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4366 {
4367 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4368 }
4369
4370 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371 {
4372 stateid->type = NFS4_OPEN_STATEID_TYPE;
4373 return decode_stateid(xdr, stateid);
4374 }
4375
4376 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377 {
4378 stateid->type = NFS4_LOCK_STATEID_TYPE;
4379 return decode_stateid(xdr, stateid);
4380 }
4381
4382 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4383 {
4384 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4385 return decode_stateid(xdr, stateid);
4386 }
4387
4388 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4389 {
4390 nfs4_stateid dummy;
4391
4392 nfs4_stateid_copy(stateid, &invalid_stateid);
4393 return decode_stateid(xdr, &dummy);
4394 }
4395
4396 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4397 {
4398 int status;
4399
4400 status = decode_op_hdr(xdr, OP_CLOSE);
4401 if (status != -EIO)
4402 nfs_increment_open_seqid(status, res->seqid);
4403 if (!status)
4404 status = decode_invalid_stateid(xdr, &res->stateid);
4405 return status;
4406 }
4407
4408 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4409 {
4410 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4411 }
4412
4413 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4414 {
4415 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4416 }
4417
4418 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4419 {
4420 int status;
4421
4422 status = decode_op_hdr(xdr, OP_COMMIT);
4423 if (!status)
4424 status = decode_write_verifier(xdr, &res->verf->verifier);
4425 return status;
4426 }
4427
4428 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4429 {
4430 __be32 *p;
4431 uint32_t bmlen;
4432 int status;
4433
4434 status = decode_op_hdr(xdr, OP_CREATE);
4435 if (status)
4436 return status;
4437 if ((status = decode_change_info(xdr, cinfo)))
4438 return status;
4439 p = xdr_inline_decode(xdr, 4);
4440 if (unlikely(!p))
4441 goto out_overflow;
4442 bmlen = be32_to_cpup(p);
4443 p = xdr_inline_decode(xdr, bmlen << 2);
4444 if (likely(p))
4445 return 0;
4446 out_overflow:
4447 print_overflow_msg(__func__, xdr);
4448 return -EIO;
4449 }
4450
4451 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4452 {
4453 unsigned int savep;
4454 uint32_t attrlen, bitmap[3] = {0};
4455 int status;
4456
4457 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4458 goto xdr_error;
4459 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4460 goto xdr_error;
4461 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4462 goto xdr_error;
4463 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4464 goto xdr_error;
4465 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4466 &res->fh_expire_type)) != 0)
4467 goto xdr_error;
4468 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4469 goto xdr_error;
4470 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4471 goto xdr_error;
4472 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4473 goto xdr_error;
4474 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4475 res->exclcreat_bitmask)) != 0)
4476 goto xdr_error;
4477 status = verify_attr_len(xdr, savep, attrlen);
4478 xdr_error:
4479 dprintk("%s: xdr returned %d!\n", __func__, -status);
4480 return status;
4481 }
4482
4483 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4484 {
4485 unsigned int savep;
4486 uint32_t attrlen, bitmap[3] = {0};
4487 int status;
4488
4489 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4490 goto xdr_error;
4491 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4492 goto xdr_error;
4493 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4494 goto xdr_error;
4495
4496 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4497 goto xdr_error;
4498 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4499 goto xdr_error;
4500 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4501 goto xdr_error;
4502
4503 status = -EIO;
4504 if (unlikely(bitmap[0]))
4505 goto xdr_error;
4506
4507 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4508 goto xdr_error;
4509 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4510 goto xdr_error;
4511 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4512 goto xdr_error;
4513
4514 status = verify_attr_len(xdr, savep, attrlen);
4515 xdr_error:
4516 dprintk("%s: xdr returned %d!\n", __func__, -status);
4517 return status;
4518 }
4519
4520 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4521 {
4522 unsigned int savep;
4523 uint32_t attrlen, bitmap[3] = {0};
4524 int status;
4525
4526 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4527 goto xdr_error;
4528 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4529 goto xdr_error;
4530 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4531 goto xdr_error;
4532
4533 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4534 goto xdr_error;
4535 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4536 goto xdr_error;
4537
4538 status = verify_attr_len(xdr, savep, attrlen);
4539 xdr_error:
4540 dprintk("%s: xdr returned %d!\n", __func__, -status);
4541 return status;
4542 }
4543
4544 static int decode_threshold_hint(struct xdr_stream *xdr,
4545 uint32_t *bitmap,
4546 uint64_t *res,
4547 uint32_t hint_bit)
4548 {
4549 __be32 *p;
4550
4551 *res = 0;
4552 if (likely(bitmap[0] & hint_bit)) {
4553 p = xdr_inline_decode(xdr, 8);
4554 if (unlikely(!p))
4555 goto out_overflow;
4556 xdr_decode_hyper(p, res);
4557 }
4558 return 0;
4559 out_overflow:
4560 print_overflow_msg(__func__, xdr);
4561 return -EIO;
4562 }
4563
4564 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4565 struct nfs4_threshold *res)
4566 {
4567 __be32 *p;
4568 unsigned int savep;
4569 uint32_t bitmap[3] = {0,}, attrlen;
4570 int status;
4571
4572 /* layout type */
4573 p = xdr_inline_decode(xdr, 4);
4574 if (unlikely(!p)) {
4575 print_overflow_msg(__func__, xdr);
4576 return -EIO;
4577 }
4578 res->l_type = be32_to_cpup(p);
4579
4580 /* thi_hintset bitmap */
4581 status = decode_attr_bitmap(xdr, bitmap);
4582 if (status < 0)
4583 goto xdr_error;
4584
4585 /* thi_hintlist length */
4586 status = decode_attr_length(xdr, &attrlen, &savep);
4587 if (status < 0)
4588 goto xdr_error;
4589 /* thi_hintlist */
4590 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4591 if (status < 0)
4592 goto xdr_error;
4593 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4594 if (status < 0)
4595 goto xdr_error;
4596 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4597 THRESHOLD_RD_IO);
4598 if (status < 0)
4599 goto xdr_error;
4600 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4601 THRESHOLD_WR_IO);
4602 if (status < 0)
4603 goto xdr_error;
4604
4605 status = verify_attr_len(xdr, savep, attrlen);
4606 res->bm = bitmap[0];
4607
4608 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4609 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4610 res->wr_io_sz);
4611 xdr_error:
4612 dprintk("%s ret=%d!\n", __func__, status);
4613 return status;
4614 }
4615
4616 /*
4617 * Thresholds on pNFS direct I/O vrs MDS I/O
4618 */
4619 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4620 uint32_t *bitmap,
4621 struct nfs4_threshold *res)
4622 {
4623 __be32 *p;
4624 int status = 0;
4625 uint32_t num;
4626
4627 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4628 return -EIO;
4629 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4630 /* Did the server return an unrequested attribute? */
4631 if (unlikely(res == NULL))
4632 return -EREMOTEIO;
4633 p = xdr_inline_decode(xdr, 4);
4634 if (unlikely(!p))
4635 goto out_overflow;
4636 num = be32_to_cpup(p);
4637 if (num == 0)
4638 return 0;
4639 if (num > 1)
4640 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4641 "drivers per filesystem not supported\n",
4642 __func__);
4643
4644 status = decode_first_threshold_item4(xdr, res);
4645 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4646 }
4647 return status;
4648 out_overflow:
4649 print_overflow_msg(__func__, xdr);
4650 return -EIO;
4651 }
4652
4653 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4654 struct nfs_fattr *fattr, struct nfs_fh *fh,
4655 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4656 const struct nfs_server *server)
4657 {
4658 int status;
4659 umode_t fmode = 0;
4660 uint32_t type;
4661 int32_t err;
4662
4663 status = decode_attr_type(xdr, bitmap, &type);
4664 if (status < 0)
4665 goto xdr_error;
4666 fattr->mode = 0;
4667 if (status != 0) {
4668 fattr->mode |= nfs_type2fmt[type];
4669 fattr->valid |= status;
4670 }
4671
4672 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4673 if (status < 0)
4674 goto xdr_error;
4675 fattr->valid |= status;
4676
4677 status = decode_attr_size(xdr, bitmap, &fattr->size);
4678 if (status < 0)
4679 goto xdr_error;
4680 fattr->valid |= status;
4681
4682 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4683 if (status < 0)
4684 goto xdr_error;
4685 fattr->valid |= status;
4686
4687 err = 0;
4688 status = decode_attr_error(xdr, bitmap, &err);
4689 if (status < 0)
4690 goto xdr_error;
4691
4692 status = decode_attr_filehandle(xdr, bitmap, fh);
4693 if (status < 0)
4694 goto xdr_error;
4695
4696 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4697 if (status < 0)
4698 goto xdr_error;
4699 fattr->valid |= status;
4700
4701 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4702 if (status < 0)
4703 goto xdr_error;
4704 fattr->valid |= status;
4705
4706 status = -EIO;
4707 if (unlikely(bitmap[0]))
4708 goto xdr_error;
4709
4710 status = decode_attr_mode(xdr, bitmap, &fmode);
4711 if (status < 0)
4712 goto xdr_error;
4713 if (status != 0) {
4714 fattr->mode |= fmode;
4715 fattr->valid |= status;
4716 }
4717
4718 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4719 if (status < 0)
4720 goto xdr_error;
4721 fattr->valid |= status;
4722
4723 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4724 if (status < 0)
4725 goto xdr_error;
4726 fattr->valid |= status;
4727
4728 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4729 if (status < 0)
4730 goto xdr_error;
4731 fattr->valid |= status;
4732
4733 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4734 if (status < 0)
4735 goto xdr_error;
4736 fattr->valid |= status;
4737
4738 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4739 if (status < 0)
4740 goto xdr_error;
4741 fattr->valid |= status;
4742
4743 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4744 if (status < 0)
4745 goto xdr_error;
4746 fattr->valid |= status;
4747
4748 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4749 if (status < 0)
4750 goto xdr_error;
4751 fattr->valid |= status;
4752
4753 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4754 if (status < 0)
4755 goto xdr_error;
4756 fattr->valid |= status;
4757
4758 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4759 if (status < 0)
4760 goto xdr_error;
4761 fattr->valid |= status;
4762
4763 status = -EIO;
4764 if (unlikely(bitmap[1]))
4765 goto xdr_error;
4766
4767 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4768 if (status < 0)
4769 goto xdr_error;
4770
4771 if (label) {
4772 status = decode_attr_security_label(xdr, bitmap, label);
4773 if (status < 0)
4774 goto xdr_error;
4775 fattr->valid |= status;
4776 }
4777
4778 xdr_error:
4779 dprintk("%s: xdr returned %d\n", __func__, -status);
4780 return status;
4781 }
4782
4783 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4784 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4785 struct nfs4_label *label, const struct nfs_server *server)
4786 {
4787 unsigned int savep;
4788 uint32_t attrlen,
4789 bitmap[3] = {0};
4790 int status;
4791
4792 status = decode_op_hdr(xdr, OP_GETATTR);
4793 if (status < 0)
4794 goto xdr_error;
4795
4796 status = decode_attr_bitmap(xdr, bitmap);
4797 if (status < 0)
4798 goto xdr_error;
4799
4800 status = decode_attr_length(xdr, &attrlen, &savep);
4801 if (status < 0)
4802 goto xdr_error;
4803
4804 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4805 label, server);
4806 if (status < 0)
4807 goto xdr_error;
4808
4809 status = verify_attr_len(xdr, savep, attrlen);
4810 xdr_error:
4811 dprintk("%s: xdr returned %d\n", __func__, -status);
4812 return status;
4813 }
4814
4815 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4816 struct nfs4_label *label, const struct nfs_server *server)
4817 {
4818 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4819 }
4820
4821 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4822 const struct nfs_server *server)
4823 {
4824 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4825 }
4826
4827 /*
4828 * Decode potentially multiple layout types.
4829 */
4830 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4831 struct nfs_fsinfo *fsinfo)
4832 {
4833 __be32 *p;
4834 uint32_t i;
4835
4836 p = xdr_inline_decode(xdr, 4);
4837 if (unlikely(!p))
4838 goto out_overflow;
4839 fsinfo->nlayouttypes = be32_to_cpup(p);
4840
4841 /* pNFS is not supported by the underlying file system */
4842 if (fsinfo->nlayouttypes == 0)
4843 return 0;
4844
4845 /* Decode and set first layout type, move xdr->p past unused types */
4846 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4847 if (unlikely(!p))
4848 goto out_overflow;
4849
4850 /* If we get too many, then just cap it at the max */
4851 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4852 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4853 __func__, fsinfo->nlayouttypes);
4854 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4855 }
4856
4857 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4858 fsinfo->layouttype[i] = be32_to_cpup(p++);
4859 return 0;
4860 out_overflow:
4861 print_overflow_msg(__func__, xdr);
4862 return -EIO;
4863 }
4864
4865 /*
4866 * The type of file system exported.
4867 * Note we must ensure that layouttype is set in any non-error case.
4868 */
4869 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4870 struct nfs_fsinfo *fsinfo)
4871 {
4872 int status = 0;
4873
4874 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4875 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4876 return -EIO;
4877 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4878 status = decode_pnfs_layout_types(xdr, fsinfo);
4879 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4880 }
4881 return status;
4882 }
4883
4884 /*
4885 * The prefered block size for layout directed io
4886 */
4887 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4888 uint32_t *res)
4889 {
4890 __be32 *p;
4891
4892 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4893 *res = 0;
4894 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4895 p = xdr_inline_decode(xdr, 4);
4896 if (unlikely(!p)) {
4897 print_overflow_msg(__func__, xdr);
4898 return -EIO;
4899 }
4900 *res = be32_to_cpup(p);
4901 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4902 }
4903 return 0;
4904 }
4905
4906 /*
4907 * The granularity of a CLONE operation.
4908 */
4909 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4910 uint32_t *res)
4911 {
4912 __be32 *p;
4913
4914 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4915 *res = 0;
4916 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4917 p = xdr_inline_decode(xdr, 4);
4918 if (unlikely(!p)) {
4919 print_overflow_msg(__func__, xdr);
4920 return -EIO;
4921 }
4922 *res = be32_to_cpup(p);
4923 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4924 }
4925 return 0;
4926 }
4927
4928 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4929 {
4930 unsigned int savep;
4931 uint32_t attrlen, bitmap[3];
4932 int status;
4933
4934 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4935 goto xdr_error;
4936 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4937 goto xdr_error;
4938 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4939 goto xdr_error;
4940
4941 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4942
4943 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4944 goto xdr_error;
4945 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4946 goto xdr_error;
4947 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4948 goto xdr_error;
4949 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4950 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4951 goto xdr_error;
4952 fsinfo->wtpref = fsinfo->wtmax;
4953
4954 status = -EIO;
4955 if (unlikely(bitmap[0]))
4956 goto xdr_error;
4957
4958 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4959 if (status != 0)
4960 goto xdr_error;
4961 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4962 if (status != 0)
4963 goto xdr_error;
4964
4965 status = -EIO;
4966 if (unlikely(bitmap[1]))
4967 goto xdr_error;
4968
4969 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4970 if (status)
4971 goto xdr_error;
4972 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4973 if (status)
4974 goto xdr_error;
4975
4976 status = verify_attr_len(xdr, savep, attrlen);
4977 xdr_error:
4978 dprintk("%s: xdr returned %d!\n", __func__, -status);
4979 return status;
4980 }
4981
4982 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4983 {
4984 __be32 *p;
4985 uint32_t len;
4986 int status;
4987
4988 /* Zero handle first to allow comparisons */
4989 memset(fh, 0, sizeof(*fh));
4990
4991 status = decode_op_hdr(xdr, OP_GETFH);
4992 if (status)
4993 return status;
4994
4995 p = xdr_inline_decode(xdr, 4);
4996 if (unlikely(!p))
4997 goto out_overflow;
4998 len = be32_to_cpup(p);
4999 if (len > NFS4_FHSIZE)
5000 return -EIO;
5001 fh->size = len;
5002 p = xdr_inline_decode(xdr, len);
5003 if (unlikely(!p))
5004 goto out_overflow;
5005 memcpy(fh->data, p, len);
5006 return 0;
5007 out_overflow:
5008 print_overflow_msg(__func__, xdr);
5009 return -EIO;
5010 }
5011
5012 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5013 {
5014 int status;
5015
5016 status = decode_op_hdr(xdr, OP_LINK);
5017 if (status)
5018 return status;
5019 return decode_change_info(xdr, cinfo);
5020 }
5021
5022 /*
5023 * We create the owner, so we know a proper owner.id length is 4.
5024 */
5025 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5026 {
5027 uint64_t offset, length, clientid;
5028 __be32 *p;
5029 uint32_t namelen, type;
5030
5031 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5032 if (unlikely(!p))
5033 goto out_overflow;
5034 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5035 p = xdr_decode_hyper(p, &length);
5036 type = be32_to_cpup(p++); /* 4 byte read */
5037 if (fl != NULL) { /* manipulate file lock */
5038 fl->fl_start = (loff_t)offset;
5039 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5040 if (length == ~(uint64_t)0)
5041 fl->fl_end = OFFSET_MAX;
5042 fl->fl_type = F_WRLCK;
5043 if (type & 1)
5044 fl->fl_type = F_RDLCK;
5045 fl->fl_pid = 0;
5046 }
5047 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5048 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
5049 p = xdr_inline_decode(xdr, namelen); /* variable size field */
5050 if (likely(p))
5051 return -NFS4ERR_DENIED;
5052 out_overflow:
5053 print_overflow_msg(__func__, xdr);
5054 return -EIO;
5055 }
5056
5057 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5058 {
5059 int status;
5060
5061 status = decode_op_hdr(xdr, OP_LOCK);
5062 if (status == -EIO)
5063 goto out;
5064 if (status == 0) {
5065 status = decode_lock_stateid(xdr, &res->stateid);
5066 if (unlikely(status))
5067 goto out;
5068 } else if (status == -NFS4ERR_DENIED)
5069 status = decode_lock_denied(xdr, NULL);
5070 if (res->open_seqid != NULL)
5071 nfs_increment_open_seqid(status, res->open_seqid);
5072 nfs_increment_lock_seqid(status, res->lock_seqid);
5073 out:
5074 return status;
5075 }
5076
5077 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5078 {
5079 int status;
5080 status = decode_op_hdr(xdr, OP_LOCKT);
5081 if (status == -NFS4ERR_DENIED)
5082 return decode_lock_denied(xdr, res->denied);
5083 return status;
5084 }
5085
5086 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5087 {
5088 int status;
5089
5090 status = decode_op_hdr(xdr, OP_LOCKU);
5091 if (status != -EIO)
5092 nfs_increment_lock_seqid(status, res->seqid);
5093 if (status == 0)
5094 status = decode_lock_stateid(xdr, &res->stateid);
5095 return status;
5096 }
5097
5098 static int decode_release_lockowner(struct xdr_stream *xdr)
5099 {
5100 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5101 }
5102
5103 static int decode_lookup(struct xdr_stream *xdr)
5104 {
5105 return decode_op_hdr(xdr, OP_LOOKUP);
5106 }
5107
5108 static int decode_lookupp(struct xdr_stream *xdr)
5109 {
5110 return decode_op_hdr(xdr, OP_LOOKUPP);
5111 }
5112
5113 /* This is too sick! */
5114 static int decode_space_limit(struct xdr_stream *xdr,
5115 unsigned long *pagemod_limit)
5116 {
5117 __be32 *p;
5118 uint32_t limit_type, nblocks, blocksize;
5119 u64 maxsize = 0;
5120
5121 p = xdr_inline_decode(xdr, 12);
5122 if (unlikely(!p))
5123 goto out_overflow;
5124 limit_type = be32_to_cpup(p++);
5125 switch (limit_type) {
5126 case NFS4_LIMIT_SIZE:
5127 xdr_decode_hyper(p, &maxsize);
5128 break;
5129 case NFS4_LIMIT_BLOCKS:
5130 nblocks = be32_to_cpup(p++);
5131 blocksize = be32_to_cpup(p);
5132 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5133 }
5134 maxsize >>= PAGE_SHIFT;
5135 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5136 return 0;
5137 out_overflow:
5138 print_overflow_msg(__func__, xdr);
5139 return -EIO;
5140 }
5141
5142 static int decode_rw_delegation(struct xdr_stream *xdr,
5143 uint32_t delegation_type,
5144 struct nfs_openres *res)
5145 {
5146 __be32 *p;
5147 int status;
5148
5149 status = decode_delegation_stateid(xdr, &res->delegation);
5150 if (unlikely(status))
5151 return status;
5152 p = xdr_inline_decode(xdr, 4);
5153 if (unlikely(!p))
5154 goto out_overflow;
5155 res->do_recall = be32_to_cpup(p);
5156
5157 switch (delegation_type) {
5158 case NFS4_OPEN_DELEGATE_READ:
5159 res->delegation_type = FMODE_READ;
5160 break;
5161 case NFS4_OPEN_DELEGATE_WRITE:
5162 res->delegation_type = FMODE_WRITE|FMODE_READ;
5163 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5164 return -EIO;
5165 }
5166 return decode_ace(xdr, NULL);
5167 out_overflow:
5168 print_overflow_msg(__func__, xdr);
5169 return -EIO;
5170 }
5171
5172 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5173 {
5174 __be32 *p;
5175 uint32_t why_no_delegation;
5176
5177 p = xdr_inline_decode(xdr, 4);
5178 if (unlikely(!p))
5179 goto out_overflow;
5180 why_no_delegation = be32_to_cpup(p);
5181 switch (why_no_delegation) {
5182 case WND4_CONTENTION:
5183 case WND4_RESOURCE:
5184 xdr_inline_decode(xdr, 4);
5185 /* Ignore for now */
5186 }
5187 return 0;
5188 out_overflow:
5189 print_overflow_msg(__func__, xdr);
5190 return -EIO;
5191 }
5192
5193 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5194 {
5195 __be32 *p;
5196 uint32_t delegation_type;
5197
5198 p = xdr_inline_decode(xdr, 4);
5199 if (unlikely(!p))
5200 goto out_overflow;
5201 delegation_type = be32_to_cpup(p);
5202 res->delegation_type = 0;
5203 switch (delegation_type) {
5204 case NFS4_OPEN_DELEGATE_NONE:
5205 return 0;
5206 case NFS4_OPEN_DELEGATE_READ:
5207 case NFS4_OPEN_DELEGATE_WRITE:
5208 return decode_rw_delegation(xdr, delegation_type, res);
5209 case NFS4_OPEN_DELEGATE_NONE_EXT:
5210 return decode_no_delegation(xdr, res);
5211 }
5212 return -EIO;
5213 out_overflow:
5214 print_overflow_msg(__func__, xdr);
5215 return -EIO;
5216 }
5217
5218 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5219 {
5220 __be32 *p;
5221 uint32_t savewords, bmlen, i;
5222 int status;
5223
5224 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5225 return status;
5226 nfs_increment_open_seqid(status, res->seqid);
5227 if (status)
5228 return status;
5229 status = decode_open_stateid(xdr, &res->stateid);
5230 if (unlikely(status))
5231 return status;
5232
5233 decode_change_info(xdr, &res->cinfo);
5234
5235 p = xdr_inline_decode(xdr, 8);
5236 if (unlikely(!p))
5237 goto out_overflow;
5238 res->rflags = be32_to_cpup(p++);
5239 bmlen = be32_to_cpup(p);
5240 if (bmlen > 10)
5241 goto xdr_error;
5242
5243 p = xdr_inline_decode(xdr, bmlen << 2);
5244 if (unlikely(!p))
5245 goto out_overflow;
5246 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5247 for (i = 0; i < savewords; ++i)
5248 res->attrset[i] = be32_to_cpup(p++);
5249 for (; i < NFS4_BITMAP_SIZE; i++)
5250 res->attrset[i] = 0;
5251
5252 return decode_delegation(xdr, res);
5253 xdr_error:
5254 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5255 return -EIO;
5256 out_overflow:
5257 print_overflow_msg(__func__, xdr);
5258 return -EIO;
5259 }
5260
5261 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5262 {
5263 int status;
5264
5265 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5266 if (status != -EIO)
5267 nfs_increment_open_seqid(status, res->seqid);
5268 if (!status)
5269 status = decode_open_stateid(xdr, &res->stateid);
5270 return status;
5271 }
5272
5273 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5274 {
5275 int status;
5276
5277 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5278 if (status != -EIO)
5279 nfs_increment_open_seqid(status, res->seqid);
5280 if (!status)
5281 status = decode_open_stateid(xdr, &res->stateid);
5282 return status;
5283 }
5284
5285 static int decode_putfh(struct xdr_stream *xdr)
5286 {
5287 return decode_op_hdr(xdr, OP_PUTFH);
5288 }
5289
5290 static int decode_putrootfh(struct xdr_stream *xdr)
5291 {
5292 return decode_op_hdr(xdr, OP_PUTROOTFH);
5293 }
5294
5295 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5296 struct nfs_pgio_res *res)
5297 {
5298 __be32 *p;
5299 uint32_t count, eof, recvd;
5300 int status;
5301
5302 status = decode_op_hdr(xdr, OP_READ);
5303 if (status)
5304 return status;
5305 p = xdr_inline_decode(xdr, 8);
5306 if (unlikely(!p))
5307 goto out_overflow;
5308 eof = be32_to_cpup(p++);
5309 count = be32_to_cpup(p);
5310 recvd = xdr_read_pages(xdr, count);
5311 if (count > recvd) {
5312 dprintk("NFS: server cheating in read reply: "
5313 "count %u > recvd %u\n", count, recvd);
5314 count = recvd;
5315 eof = 0;
5316 }
5317 res->eof = eof;
5318 res->count = count;
5319 return 0;
5320 out_overflow:
5321 print_overflow_msg(__func__, xdr);
5322 return -EIO;
5323 }
5324
5325 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5326 {
5327 int status;
5328 __be32 verf[2];
5329
5330 status = decode_op_hdr(xdr, OP_READDIR);
5331 if (!status)
5332 status = decode_verifier(xdr, readdir->verifier.data);
5333 if (unlikely(status))
5334 return status;
5335 memcpy(verf, readdir->verifier.data, sizeof(verf));
5336 dprintk("%s: verifier = %08x:%08x\n",
5337 __func__, verf[0], verf[1]);
5338 return xdr_read_pages(xdr, xdr->buf->page_len);
5339 }
5340
5341 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5342 {
5343 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5344 u32 len, recvd;
5345 __be32 *p;
5346 int status;
5347
5348 status = decode_op_hdr(xdr, OP_READLINK);
5349 if (status)
5350 return status;
5351
5352 /* Convert length of symlink */
5353 p = xdr_inline_decode(xdr, 4);
5354 if (unlikely(!p))
5355 goto out_overflow;
5356 len = be32_to_cpup(p);
5357 if (len >= rcvbuf->page_len || len <= 0) {
5358 dprintk("nfs: server returned giant symlink!\n");
5359 return -ENAMETOOLONG;
5360 }
5361 recvd = xdr_read_pages(xdr, len);
5362 if (recvd < len) {
5363 dprintk("NFS: server cheating in readlink reply: "
5364 "count %u > recvd %u\n", len, recvd);
5365 return -EIO;
5366 }
5367 /*
5368 * The XDR encode routine has set things up so that
5369 * the link text will be copied directly into the
5370 * buffer. We just have to do overflow-checking,
5371 * and and null-terminate the text (the VFS expects
5372 * null-termination).
5373 */
5374 xdr_terminate_string(rcvbuf, len);
5375 return 0;
5376 out_overflow:
5377 print_overflow_msg(__func__, xdr);
5378 return -EIO;
5379 }
5380
5381 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5382 {
5383 int status;
5384
5385 status = decode_op_hdr(xdr, OP_REMOVE);
5386 if (status)
5387 goto out;
5388 status = decode_change_info(xdr, cinfo);
5389 out:
5390 return status;
5391 }
5392
5393 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5394 struct nfs4_change_info *new_cinfo)
5395 {
5396 int status;
5397
5398 status = decode_op_hdr(xdr, OP_RENAME);
5399 if (status)
5400 goto out;
5401 if ((status = decode_change_info(xdr, old_cinfo)))
5402 goto out;
5403 status = decode_change_info(xdr, new_cinfo);
5404 out:
5405 return status;
5406 }
5407
5408 static int decode_renew(struct xdr_stream *xdr)
5409 {
5410 return decode_op_hdr(xdr, OP_RENEW);
5411 }
5412
5413 static int
5414 decode_restorefh(struct xdr_stream *xdr)
5415 {
5416 return decode_op_hdr(xdr, OP_RESTOREFH);
5417 }
5418
5419 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5420 struct nfs_getaclres *res)
5421 {
5422 unsigned int savep;
5423 uint32_t attrlen,
5424 bitmap[3] = {0};
5425 int status;
5426 unsigned int pg_offset;
5427
5428 res->acl_len = 0;
5429 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5430 goto out;
5431
5432 xdr_enter_page(xdr, xdr->buf->page_len);
5433
5434 /* Calculate the offset of the page data */
5435 pg_offset = xdr->buf->head[0].iov_len;
5436
5437 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5438 goto out;
5439 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5440 goto out;
5441
5442 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5443 return -EIO;
5444 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5445
5446 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5447 * are stored with the acl data to handle the problem of
5448 * variable length bitmaps.*/
5449 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5450 res->acl_len = attrlen;
5451
5452 /* Check for receive buffer overflow */
5453 if (res->acl_len > (xdr->nwords << 2) ||
5454 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5455 res->acl_flags |= NFS4_ACL_TRUNC;
5456 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5457 attrlen, xdr->nwords << 2);
5458 }
5459 } else
5460 status = -EOPNOTSUPP;
5461
5462 out:
5463 return status;
5464 }
5465
5466 static int
5467 decode_savefh(struct xdr_stream *xdr)
5468 {
5469 return decode_op_hdr(xdr, OP_SAVEFH);
5470 }
5471
5472 static int decode_setattr(struct xdr_stream *xdr)
5473 {
5474 __be32 *p;
5475 uint32_t bmlen;
5476 int status;
5477
5478 status = decode_op_hdr(xdr, OP_SETATTR);
5479 if (status)
5480 return status;
5481 p = xdr_inline_decode(xdr, 4);
5482 if (unlikely(!p))
5483 goto out_overflow;
5484 bmlen = be32_to_cpup(p);
5485 p = xdr_inline_decode(xdr, bmlen << 2);
5486 if (likely(p))
5487 return 0;
5488 out_overflow:
5489 print_overflow_msg(__func__, xdr);
5490 return -EIO;
5491 }
5492
5493 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5494 {
5495 __be32 *p;
5496 uint32_t opnum;
5497 int32_t nfserr;
5498
5499 p = xdr_inline_decode(xdr, 8);
5500 if (unlikely(!p))
5501 goto out_overflow;
5502 opnum = be32_to_cpup(p++);
5503 if (opnum != OP_SETCLIENTID) {
5504 dprintk("nfs: decode_setclientid: Server returned operation"
5505 " %d\n", opnum);
5506 return -EIO;
5507 }
5508 nfserr = be32_to_cpup(p);
5509 if (nfserr == NFS_OK) {
5510 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5511 if (unlikely(!p))
5512 goto out_overflow;
5513 p = xdr_decode_hyper(p, &res->clientid);
5514 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5515 } else if (nfserr == NFSERR_CLID_INUSE) {
5516 uint32_t len;
5517
5518 /* skip netid string */
5519 p = xdr_inline_decode(xdr, 4);
5520 if (unlikely(!p))
5521 goto out_overflow;
5522 len = be32_to_cpup(p);
5523 p = xdr_inline_decode(xdr, len);
5524 if (unlikely(!p))
5525 goto out_overflow;
5526
5527 /* skip uaddr string */
5528 p = xdr_inline_decode(xdr, 4);
5529 if (unlikely(!p))
5530 goto out_overflow;
5531 len = be32_to_cpup(p);
5532 p = xdr_inline_decode(xdr, len);
5533 if (unlikely(!p))
5534 goto out_overflow;
5535 return -NFSERR_CLID_INUSE;
5536 } else
5537 return nfs4_stat_to_errno(nfserr);
5538
5539 return 0;
5540 out_overflow:
5541 print_overflow_msg(__func__, xdr);
5542 return -EIO;
5543 }
5544
5545 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5546 {
5547 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5548 }
5549
5550 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5551 {
5552 __be32 *p;
5553 int status;
5554
5555 status = decode_op_hdr(xdr, OP_WRITE);
5556 if (status)
5557 return status;
5558
5559 p = xdr_inline_decode(xdr, 8);
5560 if (unlikely(!p))
5561 goto out_overflow;
5562 res->count = be32_to_cpup(p++);
5563 res->verf->committed = be32_to_cpup(p++);
5564 return decode_write_verifier(xdr, &res->verf->verifier);
5565 out_overflow:
5566 print_overflow_msg(__func__, xdr);
5567 return -EIO;
5568 }
5569
5570 static int decode_delegreturn(struct xdr_stream *xdr)
5571 {
5572 return decode_op_hdr(xdr, OP_DELEGRETURN);
5573 }
5574
5575 static int decode_secinfo_gss(struct xdr_stream *xdr,
5576 struct nfs4_secinfo4 *flavor)
5577 {
5578 u32 oid_len;
5579 __be32 *p;
5580
5581 p = xdr_inline_decode(xdr, 4);
5582 if (unlikely(!p))
5583 goto out_overflow;
5584 oid_len = be32_to_cpup(p);
5585 if (oid_len > GSS_OID_MAX_LEN)
5586 goto out_err;
5587
5588 p = xdr_inline_decode(xdr, oid_len);
5589 if (unlikely(!p))
5590 goto out_overflow;
5591 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5592 flavor->flavor_info.oid.len = oid_len;
5593
5594 p = xdr_inline_decode(xdr, 8);
5595 if (unlikely(!p))
5596 goto out_overflow;
5597 flavor->flavor_info.qop = be32_to_cpup(p++);
5598 flavor->flavor_info.service = be32_to_cpup(p);
5599
5600 return 0;
5601
5602 out_overflow:
5603 print_overflow_msg(__func__, xdr);
5604 return -EIO;
5605 out_err:
5606 return -EINVAL;
5607 }
5608
5609 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5610 {
5611 struct nfs4_secinfo4 *sec_flavor;
5612 unsigned int i, num_flavors;
5613 int status;
5614 __be32 *p;
5615
5616 p = xdr_inline_decode(xdr, 4);
5617 if (unlikely(!p))
5618 goto out_overflow;
5619
5620 res->flavors->num_flavors = 0;
5621 num_flavors = be32_to_cpup(p);
5622
5623 for (i = 0; i < num_flavors; i++) {
5624 sec_flavor = &res->flavors->flavors[i];
5625 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5626 break;
5627
5628 p = xdr_inline_decode(xdr, 4);
5629 if (unlikely(!p))
5630 goto out_overflow;
5631 sec_flavor->flavor = be32_to_cpup(p);
5632
5633 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5634 status = decode_secinfo_gss(xdr, sec_flavor);
5635 if (status)
5636 goto out;
5637 }
5638 res->flavors->num_flavors++;
5639 }
5640
5641 status = 0;
5642 out:
5643 return status;
5644 out_overflow:
5645 print_overflow_msg(__func__, xdr);
5646 return -EIO;
5647 }
5648
5649 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5650 {
5651 int status = decode_op_hdr(xdr, OP_SECINFO);
5652 if (status)
5653 return status;
5654 return decode_secinfo_common(xdr, res);
5655 }
5656
5657 #if defined(CONFIG_NFS_V4_1)
5658 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5659 {
5660 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5661 if (status)
5662 return status;
5663 return decode_secinfo_common(xdr, res);
5664 }
5665
5666 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5667 {
5668 __be32 *p;
5669 uint32_t bitmap_words;
5670 unsigned int i;
5671
5672 p = xdr_inline_decode(xdr, 4);
5673 if (!p)
5674 return -EIO;
5675 bitmap_words = be32_to_cpup(p++);
5676 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5677 return -EIO;
5678 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5679 for (i = 0; i < bitmap_words; i++)
5680 op_map->u.words[i] = be32_to_cpup(p++);
5681
5682 return 0;
5683 }
5684
5685 static int decode_exchange_id(struct xdr_stream *xdr,
5686 struct nfs41_exchange_id_res *res)
5687 {
5688 __be32 *p;
5689 uint32_t dummy;
5690 char *dummy_str;
5691 int status;
5692 uint32_t impl_id_count;
5693
5694 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5695 if (status)
5696 return status;
5697
5698 p = xdr_inline_decode(xdr, 8);
5699 if (unlikely(!p))
5700 goto out_overflow;
5701 xdr_decode_hyper(p, &res->clientid);
5702 p = xdr_inline_decode(xdr, 12);
5703 if (unlikely(!p))
5704 goto out_overflow;
5705 res->seqid = be32_to_cpup(p++);
5706 res->flags = be32_to_cpup(p++);
5707
5708 res->state_protect.how = be32_to_cpup(p);
5709 switch (res->state_protect.how) {
5710 case SP4_NONE:
5711 break;
5712 case SP4_MACH_CRED:
5713 status = decode_op_map(xdr, &res->state_protect.enforce);
5714 if (status)
5715 return status;
5716 status = decode_op_map(xdr, &res->state_protect.allow);
5717 if (status)
5718 return status;
5719 break;
5720 default:
5721 WARN_ON_ONCE(1);
5722 return -EIO;
5723 }
5724
5725 /* server_owner4.so_minor_id */
5726 p = xdr_inline_decode(xdr, 8);
5727 if (unlikely(!p))
5728 goto out_overflow;
5729 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5730
5731 /* server_owner4.so_major_id */
5732 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5733 if (unlikely(status))
5734 return status;
5735 memcpy(res->server_owner->major_id, dummy_str, dummy);
5736 res->server_owner->major_id_sz = dummy;
5737
5738 /* server_scope4 */
5739 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740 if (unlikely(status))
5741 return status;
5742 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5743 res->server_scope->server_scope_sz = dummy;
5744
5745 /* Implementation Id */
5746 p = xdr_inline_decode(xdr, 4);
5747 if (unlikely(!p))
5748 goto out_overflow;
5749 impl_id_count = be32_to_cpup(p++);
5750
5751 if (impl_id_count) {
5752 /* nii_domain */
5753 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5754 if (unlikely(status))
5755 return status;
5756 memcpy(res->impl_id->domain, dummy_str, dummy);
5757
5758 /* nii_name */
5759 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5760 if (unlikely(status))
5761 return status;
5762 memcpy(res->impl_id->name, dummy_str, dummy);
5763
5764 /* nii_date */
5765 p = xdr_inline_decode(xdr, 12);
5766 if (unlikely(!p))
5767 goto out_overflow;
5768 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5769 res->impl_id->date.nseconds = be32_to_cpup(p);
5770
5771 /* if there's more than one entry, ignore the rest */
5772 }
5773 return 0;
5774 out_overflow:
5775 print_overflow_msg(__func__, xdr);
5776 return -EIO;
5777 }
5778
5779 static int decode_chan_attrs(struct xdr_stream *xdr,
5780 struct nfs4_channel_attrs *attrs)
5781 {
5782 __be32 *p;
5783 u32 nr_attrs, val;
5784
5785 p = xdr_inline_decode(xdr, 28);
5786 if (unlikely(!p))
5787 goto out_overflow;
5788 val = be32_to_cpup(p++); /* headerpadsz */
5789 if (val)
5790 return -EINVAL; /* no support for header padding yet */
5791 attrs->max_rqst_sz = be32_to_cpup(p++);
5792 attrs->max_resp_sz = be32_to_cpup(p++);
5793 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5794 attrs->max_ops = be32_to_cpup(p++);
5795 attrs->max_reqs = be32_to_cpup(p++);
5796 nr_attrs = be32_to_cpup(p);
5797 if (unlikely(nr_attrs > 1)) {
5798 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5799 "count %u\n", __func__, nr_attrs);
5800 return -EINVAL;
5801 }
5802 if (nr_attrs == 1) {
5803 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5804 if (unlikely(!p))
5805 goto out_overflow;
5806 }
5807 return 0;
5808 out_overflow:
5809 print_overflow_msg(__func__, xdr);
5810 return -EIO;
5811 }
5812
5813 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5814 {
5815 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5816 }
5817
5818 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5819 struct nfs41_bind_conn_to_session_res *res)
5820 {
5821 __be32 *p;
5822 int status;
5823
5824 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5825 if (!status)
5826 status = decode_sessionid(xdr, &res->sessionid);
5827 if (unlikely(status))
5828 return status;
5829
5830 /* dir flags, rdma mode bool */
5831 p = xdr_inline_decode(xdr, 8);
5832 if (unlikely(!p))
5833 goto out_overflow;
5834
5835 res->dir = be32_to_cpup(p++);
5836 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5837 return -EIO;
5838 if (be32_to_cpup(p) == 0)
5839 res->use_conn_in_rdma_mode = false;
5840 else
5841 res->use_conn_in_rdma_mode = true;
5842
5843 return 0;
5844 out_overflow:
5845 print_overflow_msg(__func__, xdr);
5846 return -EIO;
5847 }
5848
5849 static int decode_create_session(struct xdr_stream *xdr,
5850 struct nfs41_create_session_res *res)
5851 {
5852 __be32 *p;
5853 int status;
5854
5855 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5856 if (!status)
5857 status = decode_sessionid(xdr, &res->sessionid);
5858 if (unlikely(status))
5859 return status;
5860
5861 /* seqid, flags */
5862 p = xdr_inline_decode(xdr, 8);
5863 if (unlikely(!p))
5864 goto out_overflow;
5865 res->seqid = be32_to_cpup(p++);
5866 res->flags = be32_to_cpup(p);
5867
5868 /* Channel attributes */
5869 status = decode_chan_attrs(xdr, &res->fc_attrs);
5870 if (!status)
5871 status = decode_chan_attrs(xdr, &res->bc_attrs);
5872 return status;
5873 out_overflow:
5874 print_overflow_msg(__func__, xdr);
5875 return -EIO;
5876 }
5877
5878 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5879 {
5880 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5881 }
5882
5883 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5884 {
5885 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5886 }
5887
5888 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5889 {
5890 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5891 }
5892 #endif /* CONFIG_NFS_V4_1 */
5893
5894 static int decode_sequence(struct xdr_stream *xdr,
5895 struct nfs4_sequence_res *res,
5896 struct rpc_rqst *rqstp)
5897 {
5898 #if defined(CONFIG_NFS_V4_1)
5899 struct nfs4_session *session;
5900 struct nfs4_sessionid id;
5901 u32 dummy;
5902 int status;
5903 __be32 *p;
5904
5905 if (res->sr_slot == NULL)
5906 return 0;
5907 if (!res->sr_slot->table->session)
5908 return 0;
5909
5910 status = decode_op_hdr(xdr, OP_SEQUENCE);
5911 if (!status)
5912 status = decode_sessionid(xdr, &id);
5913 if (unlikely(status))
5914 goto out_err;
5915
5916 /*
5917 * If the server returns different values for sessionID, slotID or
5918 * sequence number, the server is looney tunes.
5919 */
5920 status = -EREMOTEIO;
5921 session = res->sr_slot->table->session;
5922
5923 if (memcmp(id.data, session->sess_id.data,
5924 NFS4_MAX_SESSIONID_LEN)) {
5925 dprintk("%s Invalid session id\n", __func__);
5926 goto out_err;
5927 }
5928
5929 p = xdr_inline_decode(xdr, 20);
5930 if (unlikely(!p))
5931 goto out_overflow;
5932
5933 /* seqid */
5934 dummy = be32_to_cpup(p++);
5935 if (dummy != res->sr_slot->seq_nr) {
5936 dprintk("%s Invalid sequence number\n", __func__);
5937 goto out_err;
5938 }
5939 /* slot id */
5940 dummy = be32_to_cpup(p++);
5941 if (dummy != res->sr_slot->slot_nr) {
5942 dprintk("%s Invalid slot id\n", __func__);
5943 goto out_err;
5944 }
5945 /* highest slot id */
5946 res->sr_highest_slotid = be32_to_cpup(p++);
5947 /* target highest slot id */
5948 res->sr_target_highest_slotid = be32_to_cpup(p++);
5949 /* result flags */
5950 res->sr_status_flags = be32_to_cpup(p);
5951 status = 0;
5952 out_err:
5953 res->sr_status = status;
5954 return status;
5955 out_overflow:
5956 print_overflow_msg(__func__, xdr);
5957 status = -EIO;
5958 goto out_err;
5959 #else /* CONFIG_NFS_V4_1 */
5960 return 0;
5961 #endif /* CONFIG_NFS_V4_1 */
5962 }
5963
5964 #if defined(CONFIG_NFS_V4_1)
5965 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5966 {
5967 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5968 return decode_stateid(xdr, stateid);
5969 }
5970
5971 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5972 struct nfs4_getdeviceinfo_res *res)
5973 {
5974 struct pnfs_device *pdev = res->pdev;
5975 __be32 *p;
5976 uint32_t len, type;
5977 int status;
5978
5979 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5980 if (status) {
5981 if (status == -ETOOSMALL) {
5982 p = xdr_inline_decode(xdr, 4);
5983 if (unlikely(!p))
5984 goto out_overflow;
5985 pdev->mincount = be32_to_cpup(p);
5986 dprintk("%s: Min count too small. mincnt = %u\n",
5987 __func__, pdev->mincount);
5988 }
5989 return status;
5990 }
5991
5992 p = xdr_inline_decode(xdr, 8);
5993 if (unlikely(!p))
5994 goto out_overflow;
5995 type = be32_to_cpup(p++);
5996 if (type != pdev->layout_type) {
5997 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5998 __func__, pdev->layout_type, type);
5999 return -EINVAL;
6000 }
6001 /*
6002 * Get the length of the opaque device_addr4. xdr_read_pages places
6003 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6004 * and places the remaining xdr data in xdr_buf->tail
6005 */
6006 pdev->mincount = be32_to_cpup(p);
6007 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6008 goto out_overflow;
6009
6010 /* Parse notification bitmap, verifying that it is zero. */
6011 p = xdr_inline_decode(xdr, 4);
6012 if (unlikely(!p))
6013 goto out_overflow;
6014 len = be32_to_cpup(p);
6015 if (len) {
6016 uint32_t i;
6017
6018 p = xdr_inline_decode(xdr, 4 * len);
6019 if (unlikely(!p))
6020 goto out_overflow;
6021
6022 res->notification = be32_to_cpup(p++);
6023 for (i = 1; i < len; i++) {
6024 if (be32_to_cpup(p++)) {
6025 dprintk("%s: unsupported notification\n",
6026 __func__);
6027 return -EIO;
6028 }
6029 }
6030 }
6031 return 0;
6032 out_overflow:
6033 print_overflow_msg(__func__, xdr);
6034 return -EIO;
6035 }
6036
6037 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6038 struct nfs4_layoutget_res *res)
6039 {
6040 __be32 *p;
6041 int status;
6042 u32 layout_count;
6043 u32 recvd;
6044
6045 status = decode_op_hdr(xdr, OP_LAYOUTGET);
6046 if (status)
6047 return status;
6048 p = xdr_inline_decode(xdr, 4);
6049 if (unlikely(!p))
6050 goto out_overflow;
6051 res->return_on_close = be32_to_cpup(p);
6052 decode_layout_stateid(xdr, &res->stateid);
6053 p = xdr_inline_decode(xdr, 4);
6054 if (unlikely(!p))
6055 goto out_overflow;
6056 layout_count = be32_to_cpup(p);
6057 if (!layout_count) {
6058 dprintk("%s: server responded with empty layout array\n",
6059 __func__);
6060 return -EINVAL;
6061 }
6062
6063 p = xdr_inline_decode(xdr, 28);
6064 if (unlikely(!p))
6065 goto out_overflow;
6066 p = xdr_decode_hyper(p, &res->range.offset);
6067 p = xdr_decode_hyper(p, &res->range.length);
6068 res->range.iomode = be32_to_cpup(p++);
6069 res->type = be32_to_cpup(p++);
6070 res->layoutp->len = be32_to_cpup(p);
6071
6072 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6073 __func__,
6074 (unsigned long)res->range.offset,
6075 (unsigned long)res->range.length,
6076 res->range.iomode,
6077 res->type,
6078 res->layoutp->len);
6079
6080 recvd = xdr_read_pages(xdr, res->layoutp->len);
6081 if (res->layoutp->len > recvd) {
6082 dprintk("NFS: server cheating in layoutget reply: "
6083 "layout len %u > recvd %u\n",
6084 res->layoutp->len, recvd);
6085 return -EINVAL;
6086 }
6087
6088 if (layout_count > 1) {
6089 /* We only handle a length one array at the moment. Any
6090 * further entries are just ignored. Note that this means
6091 * the client may see a response that is less than the
6092 * minimum it requested.
6093 */
6094 dprintk("%s: server responded with %d layouts, dropping tail\n",
6095 __func__, layout_count);
6096 }
6097
6098 return 0;
6099 out_overflow:
6100 print_overflow_msg(__func__, xdr);
6101 return -EIO;
6102 }
6103
6104 static int decode_layoutreturn(struct xdr_stream *xdr,
6105 struct nfs4_layoutreturn_res *res)
6106 {
6107 __be32 *p;
6108 int status;
6109
6110 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6111 if (status)
6112 return status;
6113 p = xdr_inline_decode(xdr, 4);
6114 if (unlikely(!p))
6115 goto out_overflow;
6116 res->lrs_present = be32_to_cpup(p);
6117 if (res->lrs_present)
6118 status = decode_layout_stateid(xdr, &res->stateid);
6119 else
6120 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6121 return status;
6122 out_overflow:
6123 print_overflow_msg(__func__, xdr);
6124 return -EIO;
6125 }
6126
6127 static int decode_layoutcommit(struct xdr_stream *xdr,
6128 struct rpc_rqst *req,
6129 struct nfs4_layoutcommit_res *res)
6130 {
6131 __be32 *p;
6132 __u32 sizechanged;
6133 int status;
6134
6135 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6136 res->status = status;
6137 if (status)
6138 return status;
6139
6140 p = xdr_inline_decode(xdr, 4);
6141 if (unlikely(!p))
6142 goto out_overflow;
6143 sizechanged = be32_to_cpup(p);
6144
6145 if (sizechanged) {
6146 /* throw away new size */
6147 p = xdr_inline_decode(xdr, 8);
6148 if (unlikely(!p))
6149 goto out_overflow;
6150 }
6151 return 0;
6152 out_overflow:
6153 print_overflow_msg(__func__, xdr);
6154 return -EIO;
6155 }
6156
6157 static int decode_test_stateid(struct xdr_stream *xdr,
6158 struct nfs41_test_stateid_res *res)
6159 {
6160 __be32 *p;
6161 int status;
6162 int num_res;
6163
6164 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6165 if (status)
6166 return status;
6167
6168 p = xdr_inline_decode(xdr, 4);
6169 if (unlikely(!p))
6170 goto out_overflow;
6171 num_res = be32_to_cpup(p++);
6172 if (num_res != 1)
6173 goto out;
6174
6175 p = xdr_inline_decode(xdr, 4);
6176 if (unlikely(!p))
6177 goto out_overflow;
6178 res->status = be32_to_cpup(p++);
6179
6180 return status;
6181 out_overflow:
6182 print_overflow_msg(__func__, xdr);
6183 out:
6184 return -EIO;
6185 }
6186
6187 static int decode_free_stateid(struct xdr_stream *xdr,
6188 struct nfs41_free_stateid_res *res)
6189 {
6190 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6191 return res->status;
6192 }
6193 #else
6194 static inline
6195 int decode_layoutreturn(struct xdr_stream *xdr,
6196 struct nfs4_layoutreturn_res *res)
6197 {
6198 return 0;
6199 }
6200 #endif /* CONFIG_NFS_V4_1 */
6201
6202 /*
6203 * END OF "GENERIC" DECODE ROUTINES.
6204 */
6205
6206 /*
6207 * Decode OPEN_DOWNGRADE response
6208 */
6209 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6210 struct xdr_stream *xdr,
6211 void *data)
6212 {
6213 struct nfs_closeres *res = data;
6214 struct compound_hdr hdr;
6215 int status;
6216
6217 status = decode_compound_hdr(xdr, &hdr);
6218 if (status)
6219 goto out;
6220 status = decode_sequence(xdr, &res->seq_res, rqstp);
6221 if (status)
6222 goto out;
6223 status = decode_putfh(xdr);
6224 if (status)
6225 goto out;
6226 if (res->lr_res) {
6227 status = decode_layoutreturn(xdr, res->lr_res);
6228 res->lr_ret = status;
6229 if (status)
6230 goto out;
6231 }
6232 status = decode_open_downgrade(xdr, res);
6233 out:
6234 return status;
6235 }
6236
6237 /*
6238 * Decode ACCESS response
6239 */
6240 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6241 void *data)
6242 {
6243 struct nfs4_accessres *res = data;
6244 struct compound_hdr hdr;
6245 int status;
6246
6247 status = decode_compound_hdr(xdr, &hdr);
6248 if (status)
6249 goto out;
6250 status = decode_sequence(xdr, &res->seq_res, rqstp);
6251 if (status)
6252 goto out;
6253 status = decode_putfh(xdr);
6254 if (status != 0)
6255 goto out;
6256 status = decode_access(xdr, &res->supported, &res->access);
6257 if (status != 0)
6258 goto out;
6259 decode_getfattr(xdr, res->fattr, res->server);
6260 out:
6261 return status;
6262 }
6263
6264 /*
6265 * Decode LOOKUP response
6266 */
6267 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268 void *data)
6269 {
6270 struct nfs4_lookup_res *res = data;
6271 struct compound_hdr hdr;
6272 int status;
6273
6274 status = decode_compound_hdr(xdr, &hdr);
6275 if (status)
6276 goto out;
6277 status = decode_sequence(xdr, &res->seq_res, rqstp);
6278 if (status)
6279 goto out;
6280 status = decode_putfh(xdr);
6281 if (status)
6282 goto out;
6283 status = decode_lookup(xdr);
6284 if (status)
6285 goto out;
6286 status = decode_getfh(xdr, res->fh);
6287 if (status)
6288 goto out;
6289 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290 out:
6291 return status;
6292 }
6293
6294 /*
6295 * Decode LOOKUPP response
6296 */
6297 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298 void *data)
6299 {
6300 struct nfs4_lookupp_res *res = data;
6301 struct compound_hdr hdr;
6302 int status;
6303
6304 status = decode_compound_hdr(xdr, &hdr);
6305 if (status)
6306 goto out;
6307 status = decode_sequence(xdr, &res->seq_res, rqstp);
6308 if (status)
6309 goto out;
6310 status = decode_putfh(xdr);
6311 if (status)
6312 goto out;
6313 status = decode_lookupp(xdr);
6314 if (status)
6315 goto out;
6316 status = decode_getfh(xdr, res->fh);
6317 if (status)
6318 goto out;
6319 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6320 out:
6321 return status;
6322 }
6323
6324 /*
6325 * Decode LOOKUP_ROOT response
6326 */
6327 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6328 struct xdr_stream *xdr,
6329 void *data)
6330 {
6331 struct nfs4_lookup_res *res = data;
6332 struct compound_hdr hdr;
6333 int status;
6334
6335 status = decode_compound_hdr(xdr, &hdr);
6336 if (status)
6337 goto out;
6338 status = decode_sequence(xdr, &res->seq_res, rqstp);
6339 if (status)
6340 goto out;
6341 status = decode_putrootfh(xdr);
6342 if (status)
6343 goto out;
6344 status = decode_getfh(xdr, res->fh);
6345 if (status == 0)
6346 status = decode_getfattr_label(xdr, res->fattr,
6347 res->label, res->server);
6348 out:
6349 return status;
6350 }
6351
6352 /*
6353 * Decode REMOVE response
6354 */
6355 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356 void *data)
6357 {
6358 struct nfs_removeres *res = data;
6359 struct compound_hdr hdr;
6360 int status;
6361
6362 status = decode_compound_hdr(xdr, &hdr);
6363 if (status)
6364 goto out;
6365 status = decode_sequence(xdr, &res->seq_res, rqstp);
6366 if (status)
6367 goto out;
6368 status = decode_putfh(xdr);
6369 if (status)
6370 goto out;
6371 status = decode_remove(xdr, &res->cinfo);
6372 out:
6373 return status;
6374 }
6375
6376 /*
6377 * Decode RENAME response
6378 */
6379 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6380 void *data)
6381 {
6382 struct nfs_renameres *res = data;
6383 struct compound_hdr hdr;
6384 int status;
6385
6386 status = decode_compound_hdr(xdr, &hdr);
6387 if (status)
6388 goto out;
6389 status = decode_sequence(xdr, &res->seq_res, rqstp);
6390 if (status)
6391 goto out;
6392 status = decode_putfh(xdr);
6393 if (status)
6394 goto out;
6395 status = decode_savefh(xdr);
6396 if (status)
6397 goto out;
6398 status = decode_putfh(xdr);
6399 if (status)
6400 goto out;
6401 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6402 out:
6403 return status;
6404 }
6405
6406 /*
6407 * Decode LINK response
6408 */
6409 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6410 void *data)
6411 {
6412 struct nfs4_link_res *res = data;
6413 struct compound_hdr hdr;
6414 int status;
6415
6416 status = decode_compound_hdr(xdr, &hdr);
6417 if (status)
6418 goto out;
6419 status = decode_sequence(xdr, &res->seq_res, rqstp);
6420 if (status)
6421 goto out;
6422 status = decode_putfh(xdr);
6423 if (status)
6424 goto out;
6425 status = decode_savefh(xdr);
6426 if (status)
6427 goto out;
6428 status = decode_putfh(xdr);
6429 if (status)
6430 goto out;
6431 status = decode_link(xdr, &res->cinfo);
6432 if (status)
6433 goto out;
6434 /*
6435 * Note order: OP_LINK leaves the directory as the current
6436 * filehandle.
6437 */
6438 status = decode_restorefh(xdr);
6439 if (status)
6440 goto out;
6441 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6442 out:
6443 return status;
6444 }
6445
6446 /*
6447 * Decode CREATE response
6448 */
6449 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450 void *data)
6451 {
6452 struct nfs4_create_res *res = data;
6453 struct compound_hdr hdr;
6454 int status;
6455
6456 status = decode_compound_hdr(xdr, &hdr);
6457 if (status)
6458 goto out;
6459 status = decode_sequence(xdr, &res->seq_res, rqstp);
6460 if (status)
6461 goto out;
6462 status = decode_putfh(xdr);
6463 if (status)
6464 goto out;
6465 status = decode_create(xdr, &res->dir_cinfo);
6466 if (status)
6467 goto out;
6468 status = decode_getfh(xdr, res->fh);
6469 if (status)
6470 goto out;
6471 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6472 out:
6473 return status;
6474 }
6475
6476 /*
6477 * Decode SYMLINK response
6478 */
6479 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480 void *res)
6481 {
6482 return nfs4_xdr_dec_create(rqstp, xdr, res);
6483 }
6484
6485 /*
6486 * Decode GETATTR response
6487 */
6488 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6489 void *data)
6490 {
6491 struct nfs4_getattr_res *res = data;
6492 struct compound_hdr hdr;
6493 int status;
6494
6495 status = decode_compound_hdr(xdr, &hdr);
6496 if (status)
6497 goto out;
6498 status = decode_sequence(xdr, &res->seq_res, rqstp);
6499 if (status)
6500 goto out;
6501 status = decode_putfh(xdr);
6502 if (status)
6503 goto out;
6504 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6505 out:
6506 return status;
6507 }
6508
6509 /*
6510 * Encode an SETACL request
6511 */
6512 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6513 const void *data)
6514 {
6515 const struct nfs_setaclargs *args = data;
6516 struct compound_hdr hdr = {
6517 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6518 };
6519
6520 encode_compound_hdr(xdr, req, &hdr);
6521 encode_sequence(xdr, &args->seq_args, &hdr);
6522 encode_putfh(xdr, args->fh, &hdr);
6523 encode_setacl(xdr, args, &hdr);
6524 encode_nops(&hdr);
6525 }
6526
6527 /*
6528 * Decode SETACL response
6529 */
6530 static int
6531 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6532 void *data)
6533 {
6534 struct nfs_setaclres *res = data;
6535 struct compound_hdr hdr;
6536 int status;
6537
6538 status = decode_compound_hdr(xdr, &hdr);
6539 if (status)
6540 goto out;
6541 status = decode_sequence(xdr, &res->seq_res, rqstp);
6542 if (status)
6543 goto out;
6544 status = decode_putfh(xdr);
6545 if (status)
6546 goto out;
6547 status = decode_setattr(xdr);
6548 out:
6549 return status;
6550 }
6551
6552 /*
6553 * Decode GETACL response
6554 */
6555 static int
6556 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6557 void *data)
6558 {
6559 struct nfs_getaclres *res = data;
6560 struct compound_hdr hdr;
6561 int status;
6562
6563 if (res->acl_scratch != NULL) {
6564 void *p = page_address(res->acl_scratch);
6565 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6566 }
6567 status = decode_compound_hdr(xdr, &hdr);
6568 if (status)
6569 goto out;
6570 status = decode_sequence(xdr, &res->seq_res, rqstp);
6571 if (status)
6572 goto out;
6573 status = decode_putfh(xdr);
6574 if (status)
6575 goto out;
6576 status = decode_getacl(xdr, rqstp, res);
6577
6578 out:
6579 return status;
6580 }
6581
6582 /*
6583 * Decode CLOSE response
6584 */
6585 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6586 void *data)
6587 {
6588 struct nfs_closeres *res = data;
6589 struct compound_hdr hdr;
6590 int status;
6591
6592 status = decode_compound_hdr(xdr, &hdr);
6593 if (status)
6594 goto out;
6595 status = decode_sequence(xdr, &res->seq_res, rqstp);
6596 if (status)
6597 goto out;
6598 status = decode_putfh(xdr);
6599 if (status)
6600 goto out;
6601 if (res->lr_res) {
6602 status = decode_layoutreturn(xdr, res->lr_res);
6603 res->lr_ret = status;
6604 if (status)
6605 goto out;
6606 }
6607 if (res->fattr != NULL) {
6608 status = decode_getfattr(xdr, res->fattr, res->server);
6609 if (status != 0)
6610 goto out;
6611 }
6612 status = decode_close(xdr, res);
6613 out:
6614 return status;
6615 }
6616
6617 /*
6618 * Decode OPEN response
6619 */
6620 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6621 void *data)
6622 {
6623 struct nfs_openres *res = data;
6624 struct compound_hdr hdr;
6625 int status;
6626
6627 status = decode_compound_hdr(xdr, &hdr);
6628 if (status)
6629 goto out;
6630 status = decode_sequence(xdr, &res->seq_res, rqstp);
6631 if (status)
6632 goto out;
6633 status = decode_putfh(xdr);
6634 if (status)
6635 goto out;
6636 status = decode_open(xdr, res);
6637 if (status)
6638 goto out;
6639 status = decode_getfh(xdr, &res->fh);
6640 if (status)
6641 goto out;
6642 if (res->access_request)
6643 decode_access(xdr, &res->access_supported, &res->access_result);
6644 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6645 out:
6646 return status;
6647 }
6648
6649 /*
6650 * Decode OPEN_CONFIRM response
6651 */
6652 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6653 struct xdr_stream *xdr,
6654 void *data)
6655 {
6656 struct nfs_open_confirmres *res = data;
6657 struct compound_hdr hdr;
6658 int status;
6659
6660 status = decode_compound_hdr(xdr, &hdr);
6661 if (status)
6662 goto out;
6663 status = decode_putfh(xdr);
6664 if (status)
6665 goto out;
6666 status = decode_open_confirm(xdr, res);
6667 out:
6668 return status;
6669 }
6670
6671 /*
6672 * Decode OPEN response
6673 */
6674 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6675 struct xdr_stream *xdr,
6676 void *data)
6677 {
6678 struct nfs_openres *res = data;
6679 struct compound_hdr hdr;
6680 int status;
6681
6682 status = decode_compound_hdr(xdr, &hdr);
6683 if (status)
6684 goto out;
6685 status = decode_sequence(xdr, &res->seq_res, rqstp);
6686 if (status)
6687 goto out;
6688 status = decode_putfh(xdr);
6689 if (status)
6690 goto out;
6691 status = decode_open(xdr, res);
6692 if (status)
6693 goto out;
6694 if (res->access_request)
6695 decode_access(xdr, &res->access_supported, &res->access_result);
6696 decode_getfattr(xdr, res->f_attr, res->server);
6697 out:
6698 return status;
6699 }
6700
6701 /*
6702 * Decode SETATTR response
6703 */
6704 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6705 struct xdr_stream *xdr,
6706 void *data)
6707 {
6708 struct nfs_setattrres *res = data;
6709 struct compound_hdr hdr;
6710 int status;
6711
6712 status = decode_compound_hdr(xdr, &hdr);
6713 if (status)
6714 goto out;
6715 status = decode_sequence(xdr, &res->seq_res, rqstp);
6716 if (status)
6717 goto out;
6718 status = decode_putfh(xdr);
6719 if (status)
6720 goto out;
6721 status = decode_setattr(xdr);
6722 if (status)
6723 goto out;
6724 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6725 out:
6726 return status;
6727 }
6728
6729 /*
6730 * Decode LOCK response
6731 */
6732 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6733 void *data)
6734 {
6735 struct nfs_lock_res *res = data;
6736 struct compound_hdr hdr;
6737 int status;
6738
6739 status = decode_compound_hdr(xdr, &hdr);
6740 if (status)
6741 goto out;
6742 status = decode_sequence(xdr, &res->seq_res, rqstp);
6743 if (status)
6744 goto out;
6745 status = decode_putfh(xdr);
6746 if (status)
6747 goto out;
6748 status = decode_lock(xdr, res);
6749 out:
6750 return status;
6751 }
6752
6753 /*
6754 * Decode LOCKT response
6755 */
6756 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6757 void *data)
6758 {
6759 struct nfs_lockt_res *res = data;
6760 struct compound_hdr hdr;
6761 int status;
6762
6763 status = decode_compound_hdr(xdr, &hdr);
6764 if (status)
6765 goto out;
6766 status = decode_sequence(xdr, &res->seq_res, rqstp);
6767 if (status)
6768 goto out;
6769 status = decode_putfh(xdr);
6770 if (status)
6771 goto out;
6772 status = decode_lockt(xdr, res);
6773 out:
6774 return status;
6775 }
6776
6777 /*
6778 * Decode LOCKU response
6779 */
6780 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6781 void *data)
6782 {
6783 struct nfs_locku_res *res = data;
6784 struct compound_hdr hdr;
6785 int status;
6786
6787 status = decode_compound_hdr(xdr, &hdr);
6788 if (status)
6789 goto out;
6790 status = decode_sequence(xdr, &res->seq_res, rqstp);
6791 if (status)
6792 goto out;
6793 status = decode_putfh(xdr);
6794 if (status)
6795 goto out;
6796 status = decode_locku(xdr, res);
6797 out:
6798 return status;
6799 }
6800
6801 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6802 struct xdr_stream *xdr, void *dummy)
6803 {
6804 struct compound_hdr hdr;
6805 int status;
6806
6807 status = decode_compound_hdr(xdr, &hdr);
6808 if (!status)
6809 status = decode_release_lockowner(xdr);
6810 return status;
6811 }
6812
6813 /*
6814 * Decode READLINK response
6815 */
6816 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6817 struct xdr_stream *xdr,
6818 void *data)
6819 {
6820 struct nfs4_readlink_res *res = data;
6821 struct compound_hdr hdr;
6822 int status;
6823
6824 status = decode_compound_hdr(xdr, &hdr);
6825 if (status)
6826 goto out;
6827 status = decode_sequence(xdr, &res->seq_res, rqstp);
6828 if (status)
6829 goto out;
6830 status = decode_putfh(xdr);
6831 if (status)
6832 goto out;
6833 status = decode_readlink(xdr, rqstp);
6834 out:
6835 return status;
6836 }
6837
6838 /*
6839 * Decode READDIR response
6840 */
6841 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6842 void *data)
6843 {
6844 struct nfs4_readdir_res *res = data;
6845 struct compound_hdr hdr;
6846 int status;
6847
6848 status = decode_compound_hdr(xdr, &hdr);
6849 if (status)
6850 goto out;
6851 status = decode_sequence(xdr, &res->seq_res, rqstp);
6852 if (status)
6853 goto out;
6854 status = decode_putfh(xdr);
6855 if (status)
6856 goto out;
6857 status = decode_readdir(xdr, rqstp, res);
6858 out:
6859 return status;
6860 }
6861
6862 /*
6863 * Decode Read response
6864 */
6865 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6866 void *data)
6867 {
6868 struct nfs_pgio_res *res = data;
6869 struct compound_hdr hdr;
6870 int status;
6871
6872 status = decode_compound_hdr(xdr, &hdr);
6873 res->op_status = hdr.status;
6874 if (status)
6875 goto out;
6876 status = decode_sequence(xdr, &res->seq_res, rqstp);
6877 if (status)
6878 goto out;
6879 status = decode_putfh(xdr);
6880 if (status)
6881 goto out;
6882 status = decode_read(xdr, rqstp, res);
6883 if (!status)
6884 status = res->count;
6885 out:
6886 return status;
6887 }
6888
6889 /*
6890 * Decode WRITE response
6891 */
6892 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6893 void *data)
6894 {
6895 struct nfs_pgio_res *res = data;
6896 struct compound_hdr hdr;
6897 int status;
6898
6899 status = decode_compound_hdr(xdr, &hdr);
6900 res->op_status = hdr.status;
6901 if (status)
6902 goto out;
6903 status = decode_sequence(xdr, &res->seq_res, rqstp);
6904 if (status)
6905 goto out;
6906 status = decode_putfh(xdr);
6907 if (status)
6908 goto out;
6909 status = decode_write(xdr, res);
6910 if (status)
6911 goto out;
6912 if (res->fattr)
6913 decode_getfattr(xdr, res->fattr, res->server);
6914 if (!status)
6915 status = res->count;
6916 out:
6917 return status;
6918 }
6919
6920 /*
6921 * Decode COMMIT response
6922 */
6923 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6924 void *data)
6925 {
6926 struct nfs_commitres *res = data;
6927 struct compound_hdr hdr;
6928 int status;
6929
6930 status = decode_compound_hdr(xdr, &hdr);
6931 res->op_status = hdr.status;
6932 if (status)
6933 goto out;
6934 status = decode_sequence(xdr, &res->seq_res, rqstp);
6935 if (status)
6936 goto out;
6937 status = decode_putfh(xdr);
6938 if (status)
6939 goto out;
6940 status = decode_commit(xdr, res);
6941 out:
6942 return status;
6943 }
6944
6945 /*
6946 * Decode FSINFO response
6947 */
6948 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6949 void *data)
6950 {
6951 struct nfs4_fsinfo_res *res = data;
6952 struct compound_hdr hdr;
6953 int status;
6954
6955 status = decode_compound_hdr(xdr, &hdr);
6956 if (!status)
6957 status = decode_sequence(xdr, &res->seq_res, req);
6958 if (!status)
6959 status = decode_putfh(xdr);
6960 if (!status)
6961 status = decode_fsinfo(xdr, res->fsinfo);
6962 return status;
6963 }
6964
6965 /*
6966 * Decode PATHCONF response
6967 */
6968 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6969 void *data)
6970 {
6971 struct nfs4_pathconf_res *res = data;
6972 struct compound_hdr hdr;
6973 int status;
6974
6975 status = decode_compound_hdr(xdr, &hdr);
6976 if (!status)
6977 status = decode_sequence(xdr, &res->seq_res, req);
6978 if (!status)
6979 status = decode_putfh(xdr);
6980 if (!status)
6981 status = decode_pathconf(xdr, res->pathconf);
6982 return status;
6983 }
6984
6985 /*
6986 * Decode STATFS response
6987 */
6988 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6989 void *data)
6990 {
6991 struct nfs4_statfs_res *res = data;
6992 struct compound_hdr hdr;
6993 int status;
6994
6995 status = decode_compound_hdr(xdr, &hdr);
6996 if (!status)
6997 status = decode_sequence(xdr, &res->seq_res, req);
6998 if (!status)
6999 status = decode_putfh(xdr);
7000 if (!status)
7001 status = decode_statfs(xdr, res->fsstat);
7002 return status;
7003 }
7004
7005 /*
7006 * Decode GETATTR_BITMAP response
7007 */
7008 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7009 struct xdr_stream *xdr,
7010 void *data)
7011 {
7012 struct nfs4_server_caps_res *res = data;
7013 struct compound_hdr hdr;
7014 int status;
7015
7016 status = decode_compound_hdr(xdr, &hdr);
7017 if (status)
7018 goto out;
7019 status = decode_sequence(xdr, &res->seq_res, req);
7020 if (status)
7021 goto out;
7022 status = decode_putfh(xdr);
7023 if (status)
7024 goto out;
7025 status = decode_server_caps(xdr, res);
7026 out:
7027 return status;
7028 }
7029
7030 /*
7031 * Decode RENEW response
7032 */
7033 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7034 void *__unused)
7035 {
7036 struct compound_hdr hdr;
7037 int status;
7038
7039 status = decode_compound_hdr(xdr, &hdr);
7040 if (!status)
7041 status = decode_renew(xdr);
7042 return status;
7043 }
7044
7045 /*
7046 * Decode SETCLIENTID response
7047 */
7048 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7049 struct xdr_stream *xdr,
7050 void *data)
7051 {
7052 struct nfs4_setclientid_res *res = data;
7053 struct compound_hdr hdr;
7054 int status;
7055
7056 status = decode_compound_hdr(xdr, &hdr);
7057 if (!status)
7058 status = decode_setclientid(xdr, res);
7059 return status;
7060 }
7061
7062 /*
7063 * Decode SETCLIENTID_CONFIRM response
7064 */
7065 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7066 struct xdr_stream *xdr,
7067 void *data)
7068 {
7069 struct compound_hdr hdr;
7070 int status;
7071
7072 status = decode_compound_hdr(xdr, &hdr);
7073 if (!status)
7074 status = decode_setclientid_confirm(xdr);
7075 return status;
7076 }
7077
7078 /*
7079 * Decode DELEGRETURN response
7080 */
7081 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7082 struct xdr_stream *xdr,
7083 void *data)
7084 {
7085 struct nfs4_delegreturnres *res = data;
7086 struct compound_hdr hdr;
7087 int status;
7088
7089 status = decode_compound_hdr(xdr, &hdr);
7090 if (status)
7091 goto out;
7092 status = decode_sequence(xdr, &res->seq_res, rqstp);
7093 if (status)
7094 goto out;
7095 status = decode_putfh(xdr);
7096 if (status != 0)
7097 goto out;
7098 if (res->lr_res) {
7099 status = decode_layoutreturn(xdr, res->lr_res);
7100 res->lr_ret = status;
7101 if (status)
7102 goto out;
7103 }
7104 if (res->fattr) {
7105 status = decode_getfattr(xdr, res->fattr, res->server);
7106 if (status != 0)
7107 goto out;
7108 }
7109 status = decode_delegreturn(xdr);
7110 out:
7111 return status;
7112 }
7113
7114 /*
7115 * Decode FS_LOCATIONS response
7116 */
7117 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7118 struct xdr_stream *xdr,
7119 void *data)
7120 {
7121 struct nfs4_fs_locations_res *res = data;
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (status)
7127 goto out;
7128 status = decode_sequence(xdr, &res->seq_res, req);
7129 if (status)
7130 goto out;
7131 status = decode_putfh(xdr);
7132 if (status)
7133 goto out;
7134 if (res->migration) {
7135 xdr_enter_page(xdr, PAGE_SIZE);
7136 status = decode_getfattr_generic(xdr,
7137 &res->fs_locations->fattr,
7138 NULL, res->fs_locations,
7139 NULL, res->fs_locations->server);
7140 if (status)
7141 goto out;
7142 if (res->renew)
7143 status = decode_renew(xdr);
7144 } else {
7145 status = decode_lookup(xdr);
7146 if (status)
7147 goto out;
7148 xdr_enter_page(xdr, PAGE_SIZE);
7149 status = decode_getfattr_generic(xdr,
7150 &res->fs_locations->fattr,
7151 NULL, res->fs_locations,
7152 NULL, res->fs_locations->server);
7153 }
7154 out:
7155 return status;
7156 }
7157
7158 /*
7159 * Decode SECINFO response
7160 */
7161 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7162 struct xdr_stream *xdr,
7163 void *data)
7164 {
7165 struct nfs4_secinfo_res *res = data;
7166 struct compound_hdr hdr;
7167 int status;
7168
7169 status = decode_compound_hdr(xdr, &hdr);
7170 if (status)
7171 goto out;
7172 status = decode_sequence(xdr, &res->seq_res, rqstp);
7173 if (status)
7174 goto out;
7175 status = decode_putfh(xdr);
7176 if (status)
7177 goto out;
7178 status = decode_secinfo(xdr, res);
7179 out:
7180 return status;
7181 }
7182
7183 /*
7184 * Decode FSID_PRESENT response
7185 */
7186 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7187 struct xdr_stream *xdr,
7188 void *data)
7189 {
7190 struct nfs4_fsid_present_res *res = data;
7191 struct compound_hdr hdr;
7192 int status;
7193
7194 status = decode_compound_hdr(xdr, &hdr);
7195 if (status)
7196 goto out;
7197 status = decode_sequence(xdr, &res->seq_res, rqstp);
7198 if (status)
7199 goto out;
7200 status = decode_putfh(xdr);
7201 if (status)
7202 goto out;
7203 status = decode_getfh(xdr, res->fh);
7204 if (status)
7205 goto out;
7206 if (res->renew)
7207 status = decode_renew(xdr);
7208 out:
7209 return status;
7210 }
7211
7212 #if defined(CONFIG_NFS_V4_1)
7213 /*
7214 * Decode BIND_CONN_TO_SESSION response
7215 */
7216 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7217 struct xdr_stream *xdr,
7218 void *res)
7219 {
7220 struct compound_hdr hdr;
7221 int status;
7222
7223 status = decode_compound_hdr(xdr, &hdr);
7224 if (!status)
7225 status = decode_bind_conn_to_session(xdr, res);
7226 return status;
7227 }
7228
7229 /*
7230 * Decode EXCHANGE_ID response
7231 */
7232 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7233 struct xdr_stream *xdr,
7234 void *res)
7235 {
7236 struct compound_hdr hdr;
7237 int status;
7238
7239 status = decode_compound_hdr(xdr, &hdr);
7240 if (!status)
7241 status = decode_exchange_id(xdr, res);
7242 return status;
7243 }
7244
7245 /*
7246 * Decode CREATE_SESSION response
7247 */
7248 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7249 struct xdr_stream *xdr,
7250 void *res)
7251 {
7252 struct compound_hdr hdr;
7253 int status;
7254
7255 status = decode_compound_hdr(xdr, &hdr);
7256 if (!status)
7257 status = decode_create_session(xdr, res);
7258 return status;
7259 }
7260
7261 /*
7262 * Decode DESTROY_SESSION response
7263 */
7264 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7265 struct xdr_stream *xdr,
7266 void *res)
7267 {
7268 struct compound_hdr hdr;
7269 int status;
7270
7271 status = decode_compound_hdr(xdr, &hdr);
7272 if (!status)
7273 status = decode_destroy_session(xdr, res);
7274 return status;
7275 }
7276
7277 /*
7278 * Decode DESTROY_CLIENTID response
7279 */
7280 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7281 struct xdr_stream *xdr,
7282 void *res)
7283 {
7284 struct compound_hdr hdr;
7285 int status;
7286
7287 status = decode_compound_hdr(xdr, &hdr);
7288 if (!status)
7289 status = decode_destroy_clientid(xdr, res);
7290 return status;
7291 }
7292
7293 /*
7294 * Decode SEQUENCE response
7295 */
7296 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7297 struct xdr_stream *xdr,
7298 void *res)
7299 {
7300 struct compound_hdr hdr;
7301 int status;
7302
7303 status = decode_compound_hdr(xdr, &hdr);
7304 if (!status)
7305 status = decode_sequence(xdr, res, rqstp);
7306 return status;
7307 }
7308
7309 /*
7310 * Decode GET_LEASE_TIME response
7311 */
7312 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7313 struct xdr_stream *xdr,
7314 void *data)
7315 {
7316 struct nfs4_get_lease_time_res *res = data;
7317 struct compound_hdr hdr;
7318 int status;
7319
7320 status = decode_compound_hdr(xdr, &hdr);
7321 if (!status)
7322 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7323 if (!status)
7324 status = decode_putrootfh(xdr);
7325 if (!status)
7326 status = decode_fsinfo(xdr, res->lr_fsinfo);
7327 return status;
7328 }
7329
7330 /*
7331 * Decode RECLAIM_COMPLETE response
7332 */
7333 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7334 struct xdr_stream *xdr,
7335 void *data)
7336 {
7337 struct nfs41_reclaim_complete_res *res = data;
7338 struct compound_hdr hdr;
7339 int status;
7340
7341 status = decode_compound_hdr(xdr, &hdr);
7342 if (!status)
7343 status = decode_sequence(xdr, &res->seq_res, rqstp);
7344 if (!status)
7345 status = decode_reclaim_complete(xdr, NULL);
7346 return status;
7347 }
7348
7349 /*
7350 * Decode GETDEVINFO response
7351 */
7352 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7353 struct xdr_stream *xdr,
7354 void *data)
7355 {
7356 struct nfs4_getdeviceinfo_res *res = data;
7357 struct compound_hdr hdr;
7358 int status;
7359
7360 status = decode_compound_hdr(xdr, &hdr);
7361 if (status != 0)
7362 goto out;
7363 status = decode_sequence(xdr, &res->seq_res, rqstp);
7364 if (status != 0)
7365 goto out;
7366 status = decode_getdeviceinfo(xdr, res);
7367 out:
7368 return status;
7369 }
7370
7371 /*
7372 * Decode LAYOUTGET response
7373 */
7374 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7375 struct xdr_stream *xdr,
7376 void *data)
7377 {
7378 struct nfs4_layoutget_res *res = data;
7379 struct compound_hdr hdr;
7380 int status;
7381
7382 status = decode_compound_hdr(xdr, &hdr);
7383 if (status)
7384 goto out;
7385 status = decode_sequence(xdr, &res->seq_res, rqstp);
7386 if (status)
7387 goto out;
7388 status = decode_putfh(xdr);
7389 if (status)
7390 goto out;
7391 status = decode_layoutget(xdr, rqstp, res);
7392 out:
7393 return status;
7394 }
7395
7396 /*
7397 * Decode LAYOUTRETURN response
7398 */
7399 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7400 struct xdr_stream *xdr,
7401 void *data)
7402 {
7403 struct nfs4_layoutreturn_res *res = data;
7404 struct compound_hdr hdr;
7405 int status;
7406
7407 status = decode_compound_hdr(xdr, &hdr);
7408 if (status)
7409 goto out;
7410 status = decode_sequence(xdr, &res->seq_res, rqstp);
7411 if (status)
7412 goto out;
7413 status = decode_putfh(xdr);
7414 if (status)
7415 goto out;
7416 status = decode_layoutreturn(xdr, res);
7417 out:
7418 return status;
7419 }
7420
7421 /*
7422 * Decode LAYOUTCOMMIT response
7423 */
7424 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7425 struct xdr_stream *xdr,
7426 void *data)
7427 {
7428 struct nfs4_layoutcommit_res *res = data;
7429 struct compound_hdr hdr;
7430 int status;
7431
7432 status = decode_compound_hdr(xdr, &hdr);
7433 if (status)
7434 goto out;
7435 status = decode_sequence(xdr, &res->seq_res, rqstp);
7436 if (status)
7437 goto out;
7438 status = decode_putfh(xdr);
7439 if (status)
7440 goto out;
7441 status = decode_layoutcommit(xdr, rqstp, res);
7442 if (status)
7443 goto out;
7444 decode_getfattr(xdr, res->fattr, res->server);
7445 out:
7446 return status;
7447 }
7448
7449 /*
7450 * Decode SECINFO_NO_NAME response
7451 */
7452 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7453 struct xdr_stream *xdr,
7454 void *data)
7455 {
7456 struct nfs4_secinfo_res *res = data;
7457 struct compound_hdr hdr;
7458 int status;
7459
7460 status = decode_compound_hdr(xdr, &hdr);
7461 if (status)
7462 goto out;
7463 status = decode_sequence(xdr, &res->seq_res, rqstp);
7464 if (status)
7465 goto out;
7466 status = decode_putrootfh(xdr);
7467 if (status)
7468 goto out;
7469 status = decode_secinfo_no_name(xdr, res);
7470 out:
7471 return status;
7472 }
7473
7474 /*
7475 * Decode TEST_STATEID response
7476 */
7477 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7478 struct xdr_stream *xdr,
7479 void *data)
7480 {
7481 struct nfs41_test_stateid_res *res = data;
7482 struct compound_hdr hdr;
7483 int status;
7484
7485 status = decode_compound_hdr(xdr, &hdr);
7486 if (status)
7487 goto out;
7488 status = decode_sequence(xdr, &res->seq_res, rqstp);
7489 if (status)
7490 goto out;
7491 status = decode_test_stateid(xdr, res);
7492 out:
7493 return status;
7494 }
7495
7496 /*
7497 * Decode FREE_STATEID response
7498 */
7499 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7500 struct xdr_stream *xdr,
7501 void *data)
7502 {
7503 struct nfs41_free_stateid_res *res = data;
7504 struct compound_hdr hdr;
7505 int status;
7506
7507 status = decode_compound_hdr(xdr, &hdr);
7508 if (status)
7509 goto out;
7510 status = decode_sequence(xdr, &res->seq_res, rqstp);
7511 if (status)
7512 goto out;
7513 status = decode_free_stateid(xdr, res);
7514 out:
7515 return status;
7516 }
7517 #endif /* CONFIG_NFS_V4_1 */
7518
7519 /**
7520 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7521 * the local page cache.
7522 * @xdr: XDR stream where entry resides
7523 * @entry: buffer to fill in with entry data
7524 * @plus: boolean indicating whether this should be a readdirplus entry
7525 *
7526 * Returns zero if successful, otherwise a negative errno value is
7527 * returned.
7528 *
7529 * This function is not invoked during READDIR reply decoding, but
7530 * rather whenever an application invokes the getdents(2) system call
7531 * on a directory already in our cache.
7532 */
7533 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7534 bool plus)
7535 {
7536 unsigned int savep;
7537 uint32_t bitmap[3] = {0};
7538 uint32_t len;
7539 __be32 *p = xdr_inline_decode(xdr, 4);
7540 if (unlikely(!p))
7541 goto out_overflow;
7542 if (*p == xdr_zero) {
7543 p = xdr_inline_decode(xdr, 4);
7544 if (unlikely(!p))
7545 goto out_overflow;
7546 if (*p == xdr_zero)
7547 return -EAGAIN;
7548 entry->eof = 1;
7549 return -EBADCOOKIE;
7550 }
7551
7552 p = xdr_inline_decode(xdr, 12);
7553 if (unlikely(!p))
7554 goto out_overflow;
7555 entry->prev_cookie = entry->cookie;
7556 p = xdr_decode_hyper(p, &entry->cookie);
7557 entry->len = be32_to_cpup(p);
7558
7559 p = xdr_inline_decode(xdr, entry->len);
7560 if (unlikely(!p))
7561 goto out_overflow;
7562 entry->name = (const char *) p;
7563
7564 /*
7565 * In case the server doesn't return an inode number,
7566 * we fake one here. (We don't use inode number 0,
7567 * since glibc seems to choke on it...)
7568 */
7569 entry->ino = 1;
7570 entry->fattr->valid = 0;
7571
7572 if (decode_attr_bitmap(xdr, bitmap) < 0)
7573 goto out_overflow;
7574
7575 if (decode_attr_length(xdr, &len, &savep) < 0)
7576 goto out_overflow;
7577
7578 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7579 NULL, entry->label, entry->server) < 0)
7580 goto out_overflow;
7581 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7582 entry->ino = entry->fattr->mounted_on_fileid;
7583 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7584 entry->ino = entry->fattr->fileid;
7585
7586 entry->d_type = DT_UNKNOWN;
7587 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7588 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7589
7590 return 0;
7591
7592 out_overflow:
7593 print_overflow_msg(__func__, xdr);
7594 return -EAGAIN;
7595 }
7596
7597 /*
7598 * We need to translate between nfs status return values and
7599 * the local errno values which may not be the same.
7600 */
7601 static struct {
7602 int stat;
7603 int errno;
7604 } nfs_errtbl[] = {
7605 { NFS4_OK, 0 },
7606 { NFS4ERR_PERM, -EPERM },
7607 { NFS4ERR_NOENT, -ENOENT },
7608 { NFS4ERR_IO, -errno_NFSERR_IO},
7609 { NFS4ERR_NXIO, -ENXIO },
7610 { NFS4ERR_ACCESS, -EACCES },
7611 { NFS4ERR_EXIST, -EEXIST },
7612 { NFS4ERR_XDEV, -EXDEV },
7613 { NFS4ERR_NOTDIR, -ENOTDIR },
7614 { NFS4ERR_ISDIR, -EISDIR },
7615 { NFS4ERR_INVAL, -EINVAL },
7616 { NFS4ERR_FBIG, -EFBIG },
7617 { NFS4ERR_NOSPC, -ENOSPC },
7618 { NFS4ERR_ROFS, -EROFS },
7619 { NFS4ERR_MLINK, -EMLINK },
7620 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7621 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7622 { NFS4ERR_DQUOT, -EDQUOT },
7623 { NFS4ERR_STALE, -ESTALE },
7624 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7625 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7626 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7627 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7628 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7629 { NFS4ERR_BADTYPE, -EBADTYPE },
7630 { NFS4ERR_LOCKED, -EAGAIN },
7631 { NFS4ERR_SYMLINK, -ELOOP },
7632 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7633 { NFS4ERR_DEADLOCK, -EDEADLK },
7634 { -1, -EIO }
7635 };
7636
7637 /*
7638 * Convert an NFS error code to a local one.
7639 * This one is used jointly by NFSv2 and NFSv3.
7640 */
7641 static int
7642 nfs4_stat_to_errno(int stat)
7643 {
7644 int i;
7645 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7646 if (nfs_errtbl[i].stat == stat)
7647 return nfs_errtbl[i].errno;
7648 }
7649 if (stat <= 10000 || stat > 10100) {
7650 /* The server is looney tunes. */
7651 return -EREMOTEIO;
7652 }
7653 /* If we cannot translate the error, the recovery routines should
7654 * handle it.
7655 * Note: remaining NFSv4 error codes have values > 10000, so should
7656 * not conflict with native Linux error codes.
7657 */
7658 return -stat;
7659 }
7660
7661 #ifdef CONFIG_NFS_V4_2
7662 #include "nfs42xdr.c"
7663 #endif /* CONFIG_NFS_V4_2 */
7664
7665 #define PROC(proc, argtype, restype) \
7666 [NFSPROC4_CLNT_##proc] = { \
7667 .p_proc = NFSPROC4_COMPOUND, \
7668 .p_encode = nfs4_xdr_##argtype, \
7669 .p_decode = nfs4_xdr_##restype, \
7670 .p_arglen = NFS4_##argtype##_sz, \
7671 .p_replen = NFS4_##restype##_sz, \
7672 .p_statidx = NFSPROC4_CLNT_##proc, \
7673 .p_name = #proc, \
7674 }
7675
7676 #define STUB(proc) \
7677 [NFSPROC4_CLNT_##proc] = { \
7678 .p_name = #proc, \
7679 }
7680
7681 const struct rpc_procinfo nfs4_procedures[] = {
7682 PROC(READ, enc_read, dec_read),
7683 PROC(WRITE, enc_write, dec_write),
7684 PROC(COMMIT, enc_commit, dec_commit),
7685 PROC(OPEN, enc_open, dec_open),
7686 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7687 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7688 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7689 PROC(CLOSE, enc_close, dec_close),
7690 PROC(SETATTR, enc_setattr, dec_setattr),
7691 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7692 PROC(RENEW, enc_renew, dec_renew),
7693 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7694 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7695 PROC(LOCK, enc_lock, dec_lock),
7696 PROC(LOCKT, enc_lockt, dec_lockt),
7697 PROC(LOCKU, enc_locku, dec_locku),
7698 PROC(ACCESS, enc_access, dec_access),
7699 PROC(GETATTR, enc_getattr, dec_getattr),
7700 PROC(LOOKUP, enc_lookup, dec_lookup),
7701 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7702 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7703 PROC(REMOVE, enc_remove, dec_remove),
7704 PROC(RENAME, enc_rename, dec_rename),
7705 PROC(LINK, enc_link, dec_link),
7706 PROC(SYMLINK, enc_symlink, dec_symlink),
7707 PROC(CREATE, enc_create, dec_create),
7708 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7709 PROC(STATFS, enc_statfs, dec_statfs),
7710 PROC(READLINK, enc_readlink, dec_readlink),
7711 PROC(READDIR, enc_readdir, dec_readdir),
7712 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7713 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7714 PROC(GETACL, enc_getacl, dec_getacl),
7715 PROC(SETACL, enc_setacl, dec_setacl),
7716 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7717 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7718 PROC(SECINFO, enc_secinfo, dec_secinfo),
7719 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7720 #if defined(CONFIG_NFS_V4_1)
7721 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7722 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7723 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7724 PROC(SEQUENCE, enc_sequence, dec_sequence),
7725 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7726 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7727 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7728 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7729 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7730 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7731 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7732 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7733 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7734 STUB(GETDEVICELIST),
7735 PROC(BIND_CONN_TO_SESSION,
7736 enc_bind_conn_to_session, dec_bind_conn_to_session),
7737 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7738 #endif /* CONFIG_NFS_V4_1 */
7739 #ifdef CONFIG_NFS_V4_2
7740 PROC(SEEK, enc_seek, dec_seek),
7741 PROC(ALLOCATE, enc_allocate, dec_allocate),
7742 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7743 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7744 PROC(CLONE, enc_clone, dec_clone),
7745 PROC(COPY, enc_copy, dec_copy),
7746 #endif /* CONFIG_NFS_V4_2 */
7747 };
7748
7749 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7750 const struct rpc_version nfs_version4 = {
7751 .number = 4,
7752 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7753 .procs = nfs4_procedures,
7754 .counts = nfs_version4_counts,
7755 };
7756
7757 /*
7758 * Local variables:
7759 * c-basic-offset: 8
7760 * End:
7761 */
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