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s390/als: fix compile with gcov enabled
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob7bd3a5c09d3185856e85bbe8c5484fccfee3651f
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
56 #include "nfs4_fs.h"
57 #include "internal.h"
58 #include "nfs4idmap.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 /* client name */ \
143 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
144 1 /* sc_prog */ + \
145 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
146 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
147 1) /* sc_cb_ident */
148 #define decode_setclientid_maxsz \
149 (op_decode_hdr_maxsz + \
150 2 /* clientid */ + \
151 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
152 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
154 #define encode_setclientid_confirm_maxsz \
155 (op_encode_hdr_maxsz + \
156 3 + (NFS4_VERIFIER_SIZE >> 2))
157 #define decode_setclientid_confirm_maxsz \
158 (op_decode_hdr_maxsz)
159 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
160 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
161 #define encode_share_access_maxsz \
162 (2)
163 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
164 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
165 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
166 #define encode_open_maxsz (op_encode_hdr_maxsz + \
167 2 + encode_share_access_maxsz + 2 + \
168 open_owner_id_maxsz + \
169 encode_opentype_maxsz + \
170 encode_claim_null_maxsz)
171 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
172 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
173 decode_ace_maxsz)
174 #define decode_change_info_maxsz (5)
175 #define decode_open_maxsz (op_decode_hdr_maxsz + \
176 decode_stateid_maxsz + \
177 decode_change_info_maxsz + 1 + \
178 nfs4_fattr_bitmap_maxsz + \
179 decode_delegation_maxsz)
180 #define encode_open_confirm_maxsz \
181 (op_encode_hdr_maxsz + \
182 encode_stateid_maxsz + 1)
183 #define decode_open_confirm_maxsz \
184 (op_decode_hdr_maxsz + \
185 decode_stateid_maxsz)
186 #define encode_open_downgrade_maxsz \
187 (op_encode_hdr_maxsz + \
188 encode_stateid_maxsz + 1 + \
189 encode_share_access_maxsz)
190 #define decode_open_downgrade_maxsz \
191 (op_decode_hdr_maxsz + \
192 decode_stateid_maxsz)
193 #define encode_close_maxsz (op_encode_hdr_maxsz + \
194 1 + encode_stateid_maxsz)
195 #define decode_close_maxsz (op_decode_hdr_maxsz + \
196 decode_stateid_maxsz)
197 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
198 encode_stateid_maxsz + \
199 encode_attrs_maxsz)
200 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
201 nfs4_fattr_bitmap_maxsz)
202 #define encode_read_maxsz (op_encode_hdr_maxsz + \
203 encode_stateid_maxsz + 3)
204 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
205 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
206 2 + encode_verifier_maxsz + 5 + \
207 nfs4_label_maxsz)
208 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
209 decode_verifier_maxsz)
210 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
211 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
212 #define encode_write_maxsz (op_encode_hdr_maxsz + \
213 encode_stateid_maxsz + 4)
214 #define decode_write_maxsz (op_decode_hdr_maxsz + \
215 2 + decode_verifier_maxsz)
216 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
217 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
218 decode_verifier_maxsz)
219 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
220 nfs4_name_maxsz)
221 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
222 decode_change_info_maxsz)
223 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
224 2 * nfs4_name_maxsz)
225 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
226 decode_change_info_maxsz + \
227 decode_change_info_maxsz)
228 #define encode_link_maxsz (op_encode_hdr_maxsz + \
229 nfs4_name_maxsz)
230 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
231 #define encode_lockowner_maxsz (7)
232 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
233 7 + \
234 1 + encode_stateid_maxsz + 1 + \
235 encode_lockowner_maxsz)
236 #define decode_lock_denied_maxsz \
237 (8 + decode_lockowner_maxsz)
238 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
239 decode_lock_denied_maxsz)
240 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
241 encode_lockowner_maxsz)
242 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
243 decode_lock_denied_maxsz)
244 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
245 encode_stateid_maxsz + \
246 4)
247 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
248 decode_stateid_maxsz)
249 #define encode_release_lockowner_maxsz \
250 (op_encode_hdr_maxsz + \
251 encode_lockowner_maxsz)
252 #define decode_release_lockowner_maxsz \
253 (op_decode_hdr_maxsz)
254 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
255 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
256 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
257 1 + nfs4_name_maxsz + \
258 1 + \
259 nfs4_fattr_maxsz)
260 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
261 #define encode_create_maxsz (op_encode_hdr_maxsz + \
262 1 + 2 + nfs4_name_maxsz + \
263 encode_attrs_maxsz)
264 #define decode_create_maxsz (op_decode_hdr_maxsz + \
265 decode_change_info_maxsz + \
266 nfs4_fattr_bitmap_maxsz)
267 #define encode_statfs_maxsz (encode_getattr_maxsz)
268 #define decode_statfs_maxsz (decode_getattr_maxsz)
269 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
270 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
271 #define encode_getacl_maxsz (encode_getattr_maxsz)
272 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
273 nfs4_fattr_bitmap_maxsz + 1)
274 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
275 encode_stateid_maxsz + 3)
276 #define decode_setacl_maxsz (decode_setattr_maxsz)
277 #define encode_fs_locations_maxsz \
278 (encode_getattr_maxsz)
279 #define decode_fs_locations_maxsz \
280 (0)
281 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
282 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
283
284 #if defined(CONFIG_NFS_V4_1)
285 #define NFS4_MAX_MACHINE_NAME_LEN (64)
286 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
287 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
288
289 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
290 encode_verifier_maxsz + \
291 1 /* co_ownerid.len */ + \
292 /* eia_clientowner */ \
293 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
294 1 /* flags */ + \
295 1 /* spa_how */ + \
296 /* max is SP4_MACH_CRED (for now) */ + \
297 1 + NFS4_OP_MAP_NUM_WORDS + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 /* implementation id array of size 1 */ + \
300 1 /* nii_domain */ + \
301 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
302 1 /* nii_name */ + \
303 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
304 3 /* nii_date */)
305 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
306 2 /* eir_clientid */ + \
307 1 /* eir_sequenceid */ + \
308 1 /* eir_flags */ + \
309 1 /* spr_how */ + \
310 /* max is SP4_MACH_CRED (for now) */ + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 2 /* eir_server_owner.so_minor_id */ + \
314 /* eir_server_owner.so_major_id<> */ \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
316 /* eir_server_scope<> */ \
317 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
318 1 /* eir_server_impl_id array length */ + \
319 1 /* nii_domain */ + \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
321 1 /* nii_name */ + \
322 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
323 3 /* nii_date */)
324 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
325 #define decode_channel_attrs_maxsz (6 + \
326 1 /* ca_rdma_ird.len */ + \
327 1 /* ca_rdma_ird */)
328 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
329 2 /* csa_clientid */ + \
330 1 /* csa_sequence */ + \
331 1 /* csa_flags */ + \
332 encode_channel_attrs_maxsz + \
333 encode_channel_attrs_maxsz + \
334 1 /* csa_cb_program */ + \
335 1 /* csa_sec_parms.len (1) */ + \
336 1 /* cb_secflavor (AUTH_SYS) */ + \
337 1 /* stamp */ + \
338 1 /* machinename.len */ + \
339 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
340 1 /* uid */ + \
341 1 /* gid */ + \
342 1 /* gids.len (0) */)
343 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
344 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
345 1 /* csr_sequence */ + \
346 1 /* csr_flags */ + \
347 decode_channel_attrs_maxsz + \
348 decode_channel_attrs_maxsz)
349 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
350 /* bctsa_sessid */ \
351 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
352 1 /* bctsa_dir */ + \
353 1 /* bctsa_use_conn_in_rdma_mode */)
354 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
355 /* bctsr_sessid */ \
356 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
357 1 /* bctsr_dir */ + \
358 1 /* bctsr_use_conn_in_rdma_mode */)
359 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
360 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
361 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
362 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
363 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
364 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
365 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
366 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
367 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
368 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
369 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
370 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
371 1 /* layout type */ + \
372 1 /* maxcount */ + \
373 1 /* bitmap size */ + \
374 1 /* notification bitmap length */ + \
375 1 /* notification bitmap, word 0 */)
376 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
377 1 /* layout type */ + \
378 1 /* opaque devaddr4 length */ + \
379 /* devaddr4 payload is read into page */ \
380 1 /* notification bitmap length */ + \
381 1 /* notification bitmap, word 0 */)
382 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
383 encode_stateid_maxsz)
384 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
385 decode_stateid_maxsz + \
386 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
387 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
388 2 /* offset */ + \
389 2 /* length */ + \
390 1 /* reclaim */ + \
391 encode_stateid_maxsz + \
392 1 /* new offset (true) */ + \
393 2 /* last byte written */ + \
394 1 /* nt_timechanged (false) */ + \
395 1 /* layoutupdate4 layout type */ + \
396 1 /* layoutupdate4 opaqueue len */)
397 /* the actual content of layoutupdate4 should
398 be allocated by drivers and spliced in
399 using xdr_write_pages */
400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
402 encode_stateid_maxsz + \
403 1 + \
404 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
405 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
406 1 + decode_stateid_maxsz)
407 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
408 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
409 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
410 XDR_QUADLEN(NFS4_STATEID_SIZE))
411 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
412 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
413 XDR_QUADLEN(NFS4_STATEID_SIZE))
414 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
415 #else /* CONFIG_NFS_V4_1 */
416 #define encode_sequence_maxsz 0
417 #define decode_sequence_maxsz 0
418 #endif /* CONFIG_NFS_V4_1 */
419
420 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
421 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
422 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
423 encode_sequence_maxsz + \
424 encode_putfh_maxsz + \
425 encode_read_maxsz)
426 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
427 decode_sequence_maxsz + \
428 decode_putfh_maxsz + \
429 decode_read_maxsz)
430 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
431 encode_sequence_maxsz + \
432 encode_putfh_maxsz + \
433 encode_readlink_maxsz)
434 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
435 decode_sequence_maxsz + \
436 decode_putfh_maxsz + \
437 decode_readlink_maxsz)
438 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
439 encode_sequence_maxsz + \
440 encode_putfh_maxsz + \
441 encode_readdir_maxsz)
442 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
443 decode_sequence_maxsz + \
444 decode_putfh_maxsz + \
445 decode_readdir_maxsz)
446 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
447 encode_sequence_maxsz + \
448 encode_putfh_maxsz + \
449 encode_write_maxsz + \
450 encode_getattr_maxsz)
451 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_write_maxsz + \
455 decode_getattr_maxsz)
456 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
457 encode_sequence_maxsz + \
458 encode_putfh_maxsz + \
459 encode_commit_maxsz)
460 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
461 decode_sequence_maxsz + \
462 decode_putfh_maxsz + \
463 decode_commit_maxsz)
464 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
465 encode_sequence_maxsz + \
466 encode_putfh_maxsz + \
467 encode_open_maxsz + \
468 encode_access_maxsz + \
469 encode_getfh_maxsz + \
470 encode_getattr_maxsz)
471 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
472 decode_sequence_maxsz + \
473 decode_putfh_maxsz + \
474 decode_open_maxsz + \
475 decode_access_maxsz + \
476 decode_getfh_maxsz + \
477 decode_getattr_maxsz)
478 #define NFS4_enc_open_confirm_sz \
479 (compound_encode_hdr_maxsz + \
480 encode_putfh_maxsz + \
481 encode_open_confirm_maxsz)
482 #define NFS4_dec_open_confirm_sz \
483 (compound_decode_hdr_maxsz + \
484 decode_putfh_maxsz + \
485 decode_open_confirm_maxsz)
486 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
487 encode_sequence_maxsz + \
488 encode_putfh_maxsz + \
489 encode_open_maxsz + \
490 encode_access_maxsz + \
491 encode_getattr_maxsz)
492 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
493 decode_sequence_maxsz + \
494 decode_putfh_maxsz + \
495 decode_open_maxsz + \
496 decode_access_maxsz + \
497 decode_getattr_maxsz)
498 #define NFS4_enc_open_downgrade_sz \
499 (compound_encode_hdr_maxsz + \
500 encode_sequence_maxsz + \
501 encode_putfh_maxsz + \
502 encode_open_downgrade_maxsz + \
503 encode_getattr_maxsz)
504 #define NFS4_dec_open_downgrade_sz \
505 (compound_decode_hdr_maxsz + \
506 decode_sequence_maxsz + \
507 decode_putfh_maxsz + \
508 decode_open_downgrade_maxsz + \
509 decode_getattr_maxsz)
510 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
511 encode_sequence_maxsz + \
512 encode_putfh_maxsz + \
513 encode_close_maxsz + \
514 encode_getattr_maxsz)
515 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
516 decode_sequence_maxsz + \
517 decode_putfh_maxsz + \
518 decode_close_maxsz + \
519 decode_getattr_maxsz)
520 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
521 encode_sequence_maxsz + \
522 encode_putfh_maxsz + \
523 encode_setattr_maxsz + \
524 encode_getattr_maxsz)
525 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
526 decode_sequence_maxsz + \
527 decode_putfh_maxsz + \
528 decode_setattr_maxsz + \
529 decode_getattr_maxsz)
530 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
531 encode_sequence_maxsz + \
532 encode_putfh_maxsz + \
533 encode_fsinfo_maxsz)
534 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_fsinfo_maxsz)
538 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
539 encode_renew_maxsz)
540 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
541 decode_renew_maxsz)
542 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
543 encode_setclientid_maxsz)
544 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
545 decode_setclientid_maxsz)
546 #define NFS4_enc_setclientid_confirm_sz \
547 (compound_encode_hdr_maxsz + \
548 encode_setclientid_confirm_maxsz)
549 #define NFS4_dec_setclientid_confirm_sz \
550 (compound_decode_hdr_maxsz + \
551 decode_setclientid_confirm_maxsz)
552 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
553 encode_sequence_maxsz + \
554 encode_putfh_maxsz + \
555 encode_lock_maxsz)
556 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
557 decode_sequence_maxsz + \
558 decode_putfh_maxsz + \
559 decode_lock_maxsz)
560 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
561 encode_sequence_maxsz + \
562 encode_putfh_maxsz + \
563 encode_lockt_maxsz)
564 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
565 decode_sequence_maxsz + \
566 decode_putfh_maxsz + \
567 decode_lockt_maxsz)
568 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
569 encode_sequence_maxsz + \
570 encode_putfh_maxsz + \
571 encode_locku_maxsz)
572 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
573 decode_sequence_maxsz + \
574 decode_putfh_maxsz + \
575 decode_locku_maxsz)
576 #define NFS4_enc_release_lockowner_sz \
577 (compound_encode_hdr_maxsz + \
578 encode_lockowner_maxsz)
579 #define NFS4_dec_release_lockowner_sz \
580 (compound_decode_hdr_maxsz + \
581 decode_lockowner_maxsz)
582 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
583 encode_sequence_maxsz + \
584 encode_putfh_maxsz + \
585 encode_access_maxsz + \
586 encode_getattr_maxsz)
587 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
588 decode_sequence_maxsz + \
589 decode_putfh_maxsz + \
590 decode_access_maxsz + \
591 decode_getattr_maxsz)
592 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
593 encode_sequence_maxsz + \
594 encode_putfh_maxsz + \
595 encode_getattr_maxsz + \
596 encode_renew_maxsz)
597 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_getattr_maxsz + \
601 decode_renew_maxsz)
602 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
603 encode_sequence_maxsz + \
604 encode_putfh_maxsz + \
605 encode_lookup_maxsz + \
606 encode_getattr_maxsz + \
607 encode_getfh_maxsz)
608 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
609 decode_sequence_maxsz + \
610 decode_putfh_maxsz + \
611 decode_lookup_maxsz + \
612 decode_getattr_maxsz + \
613 decode_getfh_maxsz)
614 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
615 encode_sequence_maxsz + \
616 encode_putrootfh_maxsz + \
617 encode_getattr_maxsz + \
618 encode_getfh_maxsz)
619 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
620 decode_sequence_maxsz + \
621 decode_putrootfh_maxsz + \
622 decode_getattr_maxsz + \
623 decode_getfh_maxsz)
624 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
625 encode_sequence_maxsz + \
626 encode_putfh_maxsz + \
627 encode_remove_maxsz)
628 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
629 decode_sequence_maxsz + \
630 decode_putfh_maxsz + \
631 decode_remove_maxsz)
632 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
633 encode_sequence_maxsz + \
634 encode_putfh_maxsz + \
635 encode_savefh_maxsz + \
636 encode_putfh_maxsz + \
637 encode_rename_maxsz)
638 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
639 decode_sequence_maxsz + \
640 decode_putfh_maxsz + \
641 decode_savefh_maxsz + \
642 decode_putfh_maxsz + \
643 decode_rename_maxsz)
644 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
645 encode_sequence_maxsz + \
646 encode_putfh_maxsz + \
647 encode_savefh_maxsz + \
648 encode_putfh_maxsz + \
649 encode_link_maxsz + \
650 encode_restorefh_maxsz + \
651 encode_getattr_maxsz)
652 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
653 decode_sequence_maxsz + \
654 decode_putfh_maxsz + \
655 decode_savefh_maxsz + \
656 decode_putfh_maxsz + \
657 decode_link_maxsz + \
658 decode_restorefh_maxsz + \
659 decode_getattr_maxsz)
660 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
661 encode_sequence_maxsz + \
662 encode_putfh_maxsz + \
663 encode_symlink_maxsz + \
664 encode_getattr_maxsz + \
665 encode_getfh_maxsz)
666 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
667 decode_sequence_maxsz + \
668 decode_putfh_maxsz + \
669 decode_symlink_maxsz + \
670 decode_getattr_maxsz + \
671 decode_getfh_maxsz)
672 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
673 encode_sequence_maxsz + \
674 encode_putfh_maxsz + \
675 encode_create_maxsz + \
676 encode_getfh_maxsz + \
677 encode_getattr_maxsz)
678 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
679 decode_sequence_maxsz + \
680 decode_putfh_maxsz + \
681 decode_create_maxsz + \
682 decode_getfh_maxsz + \
683 decode_getattr_maxsz)
684 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
685 encode_sequence_maxsz + \
686 encode_putfh_maxsz + \
687 encode_getattr_maxsz)
688 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
689 decode_sequence_maxsz + \
690 decode_putfh_maxsz + \
691 decode_getattr_maxsz)
692 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
693 encode_sequence_maxsz + \
694 encode_putfh_maxsz + \
695 encode_statfs_maxsz)
696 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
697 decode_sequence_maxsz + \
698 decode_putfh_maxsz + \
699 decode_statfs_maxsz)
700 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
701 encode_sequence_maxsz + \
702 encode_putfh_maxsz + \
703 encode_getattr_maxsz)
704 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
705 decode_sequence_maxsz + \
706 decode_putfh_maxsz + \
707 decode_getattr_maxsz)
708 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
709 encode_sequence_maxsz + \
710 encode_putfh_maxsz + \
711 encode_delegreturn_maxsz + \
712 encode_getattr_maxsz)
713 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
714 decode_sequence_maxsz + \
715 decode_delegreturn_maxsz + \
716 decode_getattr_maxsz)
717 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
718 encode_sequence_maxsz + \
719 encode_putfh_maxsz + \
720 encode_getacl_maxsz)
721 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
722 decode_sequence_maxsz + \
723 decode_putfh_maxsz + \
724 decode_getacl_maxsz)
725 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_setacl_maxsz)
729 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_setacl_maxsz)
733 #define NFS4_enc_fs_locations_sz \
734 (compound_encode_hdr_maxsz + \
735 encode_sequence_maxsz + \
736 encode_putfh_maxsz + \
737 encode_lookup_maxsz + \
738 encode_fs_locations_maxsz + \
739 encode_renew_maxsz)
740 #define NFS4_dec_fs_locations_sz \
741 (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_lookup_maxsz + \
745 decode_fs_locations_maxsz + \
746 decode_renew_maxsz)
747 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
748 encode_sequence_maxsz + \
749 encode_putfh_maxsz + \
750 encode_secinfo_maxsz)
751 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_secinfo_maxsz)
755 #define NFS4_enc_fsid_present_sz \
756 (compound_encode_hdr_maxsz + \
757 encode_sequence_maxsz + \
758 encode_putfh_maxsz + \
759 encode_getfh_maxsz + \
760 encode_renew_maxsz)
761 #define NFS4_dec_fsid_present_sz \
762 (compound_decode_hdr_maxsz + \
763 decode_sequence_maxsz + \
764 decode_putfh_maxsz + \
765 decode_getfh_maxsz + \
766 decode_renew_maxsz)
767 #if defined(CONFIG_NFS_V4_1)
768 #define NFS4_enc_bind_conn_to_session_sz \
769 (compound_encode_hdr_maxsz + \
770 encode_bind_conn_to_session_maxsz)
771 #define NFS4_dec_bind_conn_to_session_sz \
772 (compound_decode_hdr_maxsz + \
773 decode_bind_conn_to_session_maxsz)
774 #define NFS4_enc_exchange_id_sz \
775 (compound_encode_hdr_maxsz + \
776 encode_exchange_id_maxsz)
777 #define NFS4_dec_exchange_id_sz \
778 (compound_decode_hdr_maxsz + \
779 decode_exchange_id_maxsz)
780 #define NFS4_enc_create_session_sz \
781 (compound_encode_hdr_maxsz + \
782 encode_create_session_maxsz)
783 #define NFS4_dec_create_session_sz \
784 (compound_decode_hdr_maxsz + \
785 decode_create_session_maxsz)
786 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
787 encode_destroy_session_maxsz)
788 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
789 decode_destroy_session_maxsz)
790 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
791 encode_destroy_clientid_maxsz)
792 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
793 decode_destroy_clientid_maxsz)
794 #define NFS4_enc_sequence_sz \
795 (compound_decode_hdr_maxsz + \
796 encode_sequence_maxsz)
797 #define NFS4_dec_sequence_sz \
798 (compound_decode_hdr_maxsz + \
799 decode_sequence_maxsz)
800 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
801 encode_sequence_maxsz + \
802 encode_putrootfh_maxsz + \
803 encode_fsinfo_maxsz)
804 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
805 decode_sequence_maxsz + \
806 decode_putrootfh_maxsz + \
807 decode_fsinfo_maxsz)
808 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
809 encode_sequence_maxsz + \
810 encode_reclaim_complete_maxsz)
811 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
812 decode_sequence_maxsz + \
813 decode_reclaim_complete_maxsz)
814 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
815 encode_sequence_maxsz +\
816 encode_getdeviceinfo_maxsz)
817 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
818 decode_sequence_maxsz + \
819 decode_getdeviceinfo_maxsz)
820 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
821 encode_sequence_maxsz + \
822 encode_putfh_maxsz + \
823 encode_layoutget_maxsz)
824 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_putfh_maxsz + \
827 decode_layoutget_maxsz)
828 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz +\
830 encode_putfh_maxsz + \
831 encode_layoutcommit_maxsz + \
832 encode_getattr_maxsz)
833 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
834 decode_sequence_maxsz + \
835 decode_putfh_maxsz + \
836 decode_layoutcommit_maxsz + \
837 decode_getattr_maxsz)
838 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz + \
840 encode_putfh_maxsz + \
841 encode_layoutreturn_maxsz)
842 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
843 decode_sequence_maxsz + \
844 decode_putfh_maxsz + \
845 decode_layoutreturn_maxsz)
846 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putrootfh_maxsz +\
849 encode_secinfo_no_name_maxsz)
850 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putrootfh_maxsz + \
853 decode_secinfo_no_name_maxsz)
854 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz + \
856 encode_test_stateid_maxsz)
857 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_test_stateid_maxsz)
860 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
861 encode_sequence_maxsz + \
862 encode_free_stateid_maxsz)
863 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
864 decode_sequence_maxsz + \
865 decode_free_stateid_maxsz)
866
867 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
868 compound_encode_hdr_maxsz +
869 encode_sequence_maxsz +
870 encode_putfh_maxsz +
871 encode_getattr_maxsz) *
872 XDR_UNIT);
873
874 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
875 compound_decode_hdr_maxsz +
876 decode_sequence_maxsz +
877 decode_putfh_maxsz) *
878 XDR_UNIT);
879
880 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
881 compound_decode_hdr_maxsz +
882 decode_sequence_maxsz) *
883 XDR_UNIT);
884 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
885 #endif /* CONFIG_NFS_V4_1 */
886
887 static const umode_t nfs_type2fmt[] = {
888 [NF4BAD] = 0,
889 [NF4REG] = S_IFREG,
890 [NF4DIR] = S_IFDIR,
891 [NF4BLK] = S_IFBLK,
892 [NF4CHR] = S_IFCHR,
893 [NF4LNK] = S_IFLNK,
894 [NF4SOCK] = S_IFSOCK,
895 [NF4FIFO] = S_IFIFO,
896 [NF4ATTRDIR] = 0,
897 [NF4NAMEDATTR] = 0,
898 };
899
900 struct compound_hdr {
901 int32_t status;
902 uint32_t nops;
903 __be32 * nops_p;
904 uint32_t taglen;
905 char * tag;
906 uint32_t replen; /* expected reply words */
907 u32 minorversion;
908 };
909
910 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
911 {
912 __be32 *p = xdr_reserve_space(xdr, nbytes);
913 BUG_ON(!p);
914 return p;
915 }
916
917 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
918 {
919 __be32 *p;
920
921 p = xdr_reserve_space(xdr, len);
922 xdr_encode_opaque_fixed(p, buf, len);
923 }
924
925 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
926 {
927 __be32 *p;
928
929 p = reserve_space(xdr, 4 + len);
930 xdr_encode_opaque(p, str, len);
931 }
932
933 static void encode_uint32(struct xdr_stream *xdr, u32 n)
934 {
935 __be32 *p;
936
937 p = reserve_space(xdr, 4);
938 *p = cpu_to_be32(n);
939 }
940
941 static void encode_uint64(struct xdr_stream *xdr, u64 n)
942 {
943 __be32 *p;
944
945 p = reserve_space(xdr, 8);
946 xdr_encode_hyper(p, n);
947 }
948
949 static void encode_nfs4_seqid(struct xdr_stream *xdr,
950 const struct nfs_seqid *seqid)
951 {
952 if (seqid != NULL)
953 encode_uint32(xdr, seqid->sequence->counter);
954 else
955 encode_uint32(xdr, 0);
956 }
957
958 static void encode_compound_hdr(struct xdr_stream *xdr,
959 struct rpc_rqst *req,
960 struct compound_hdr *hdr)
961 {
962 __be32 *p;
963 struct rpc_auth *auth = req->rq_cred->cr_auth;
964
965 /* initialize running count of expected bytes in reply.
966 * NOTE: the replied tag SHOULD be the same is the one sent,
967 * but this is not required as a MUST for the server to do so. */
968 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
969
970 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
971 encode_string(xdr, hdr->taglen, hdr->tag);
972 p = reserve_space(xdr, 8);
973 *p++ = cpu_to_be32(hdr->minorversion);
974 hdr->nops_p = p;
975 *p = cpu_to_be32(hdr->nops);
976 }
977
978 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
979 uint32_t replen,
980 struct compound_hdr *hdr)
981 {
982 encode_uint32(xdr, op);
983 hdr->nops++;
984 hdr->replen += replen;
985 }
986
987 static void encode_nops(struct compound_hdr *hdr)
988 {
989 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
990 *hdr->nops_p = htonl(hdr->nops);
991 }
992
993 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
994 {
995 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
996 }
997
998 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
999 {
1000 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1001 }
1002
1003 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1004 const struct nfs4_label *label,
1005 const struct nfs_server *server,
1006 bool excl_check)
1007 {
1008 char owner_name[IDMAP_NAMESZ];
1009 char owner_group[IDMAP_NAMESZ];
1010 int owner_namelen = 0;
1011 int owner_grouplen = 0;
1012 __be32 *p;
1013 unsigned i;
1014 uint32_t len = 0;
1015 uint32_t bmval_len;
1016 uint32_t bmval[3] = { 0 };
1017
1018 /*
1019 * We reserve enough space to write the entire attribute buffer at once.
1020 * In the worst-case, this would be
1021 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1022 * = 40 bytes, plus any contribution from variable-length fields
1023 * such as owner/group.
1024 */
1025 if (iap->ia_valid & ATTR_SIZE) {
1026 bmval[0] |= FATTR4_WORD0_SIZE;
1027 len += 8;
1028 }
1029 if (iap->ia_valid & ATTR_MODE) {
1030 bmval[1] |= FATTR4_WORD1_MODE;
1031 len += 4;
1032 }
1033 if (iap->ia_valid & ATTR_UID) {
1034 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035 if (owner_namelen < 0) {
1036 dprintk("nfs: couldn't resolve uid %d to string\n",
1037 from_kuid(&init_user_ns, iap->ia_uid));
1038 /* XXX */
1039 strcpy(owner_name, "nobody");
1040 owner_namelen = sizeof("nobody") - 1;
1041 /* goto out; */
1042 }
1043 bmval[1] |= FATTR4_WORD1_OWNER;
1044 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045 }
1046 if (iap->ia_valid & ATTR_GID) {
1047 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1048 if (owner_grouplen < 0) {
1049 dprintk("nfs: couldn't resolve gid %d to string\n",
1050 from_kgid(&init_user_ns, iap->ia_gid));
1051 strcpy(owner_group, "nobody");
1052 owner_grouplen = sizeof("nobody") - 1;
1053 /* goto out; */
1054 }
1055 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1056 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1057 }
1058 if (iap->ia_valid & ATTR_ATIME_SET) {
1059 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1060 len += 16;
1061 } else if (iap->ia_valid & ATTR_ATIME) {
1062 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063 len += 4;
1064 }
1065 if (iap->ia_valid & ATTR_MTIME_SET) {
1066 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1067 len += 16;
1068 } else if (iap->ia_valid & ATTR_MTIME) {
1069 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070 len += 4;
1071 }
1072
1073 if (excl_check) {
1074 const u32 *excl_bmval = server->exclcreat_bitmask;
1075 bmval[0] &= excl_bmval[0];
1076 bmval[1] &= excl_bmval[1];
1077 bmval[2] &= excl_bmval[2];
1078
1079 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1080 label = NULL;
1081 }
1082
1083 if (label) {
1084 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1085 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1086 }
1087
1088 if (bmval[2] != 0)
1089 bmval_len = 3;
1090 else if (bmval[1] != 0)
1091 bmval_len = 2;
1092 else
1093 bmval_len = 1;
1094
1095 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1096
1097 *p++ = cpu_to_be32(bmval_len);
1098 for (i = 0; i < bmval_len; i++)
1099 *p++ = cpu_to_be32(bmval[i]);
1100 *p++ = cpu_to_be32(len);
1101
1102 if (bmval[0] & FATTR4_WORD0_SIZE)
1103 p = xdr_encode_hyper(p, iap->ia_size);
1104 if (bmval[1] & FATTR4_WORD1_MODE)
1105 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1106 if (bmval[1] & FATTR4_WORD1_OWNER)
1107 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1108 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1109 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1110 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111 if (iap->ia_valid & ATTR_ATIME_SET) {
1112 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1114 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1115 } else
1116 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117 }
1118 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1119 if (iap->ia_valid & ATTR_MTIME_SET) {
1120 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1121 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1122 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1123 } else
1124 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1125 }
1126 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1127 *p++ = cpu_to_be32(label->lfs);
1128 *p++ = cpu_to_be32(label->pi);
1129 *p++ = cpu_to_be32(label->len);
1130 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1131 }
1132
1133 /* out: */
1134 }
1135
1136 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1137 {
1138 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1139 encode_uint32(xdr, access);
1140 }
1141
1142 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1143 {
1144 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1145 encode_nfs4_seqid(xdr, arg->seqid);
1146 encode_nfs4_stateid(xdr, &arg->stateid);
1147 }
1148
1149 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1150 {
1151 __be32 *p;
1152
1153 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1154 p = reserve_space(xdr, 12);
1155 p = xdr_encode_hyper(p, args->offset);
1156 *p = cpu_to_be32(args->count);
1157 }
1158
1159 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1160 {
1161 __be32 *p;
1162
1163 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1164 encode_uint32(xdr, create->ftype);
1165
1166 switch (create->ftype) {
1167 case NF4LNK:
1168 p = reserve_space(xdr, 4);
1169 *p = cpu_to_be32(create->u.symlink.len);
1170 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1171 create->u.symlink.len);
1172 xdr->buf->flags |= XDRBUF_WRITE;
1173 break;
1174
1175 case NF4BLK: case NF4CHR:
1176 p = reserve_space(xdr, 8);
1177 *p++ = cpu_to_be32(create->u.device.specdata1);
1178 *p = cpu_to_be32(create->u.device.specdata2);
1179 break;
1180
1181 default:
1182 break;
1183 }
1184
1185 encode_string(xdr, create->name->len, create->name->name);
1186 encode_attrs(xdr, create->attrs, create->label, create->server, false);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191 __be32 *p;
1192
1193 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194 p = reserve_space(xdr, 8);
1195 *p++ = cpu_to_be32(1);
1196 *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201 __be32 *p;
1202
1203 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204 p = reserve_space(xdr, 12);
1205 *p++ = cpu_to_be32(2);
1206 *p++ = cpu_to_be32(bm0);
1207 *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213 struct compound_hdr *hdr)
1214 {
1215 __be32 *p;
1216
1217 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218 if (bm2) {
1219 p = reserve_space(xdr, 16);
1220 *p++ = cpu_to_be32(3);
1221 *p++ = cpu_to_be32(bm0);
1222 *p++ = cpu_to_be32(bm1);
1223 *p = cpu_to_be32(bm2);
1224 } else if (bm1) {
1225 p = reserve_space(xdr, 12);
1226 *p++ = cpu_to_be32(2);
1227 *p++ = cpu_to_be32(bm0);
1228 *p = cpu_to_be32(bm1);
1229 } else {
1230 p = reserve_space(xdr, 8);
1231 *p++ = cpu_to_be32(1);
1232 *p = cpu_to_be32(bm0);
1233 }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239 bitmask[1] & nfs4_fattr_bitmap[1],
1240 bitmask[2] & nfs4_fattr_bitmap[2],
1241 hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245 const u32 *open_bitmap,
1246 struct compound_hdr *hdr)
1247 {
1248 encode_getattr_three(xdr,
1249 bitmask[0] & open_bitmap[0],
1250 bitmask[1] & open_bitmap[1],
1251 bitmask[2] & open_bitmap[2],
1252 hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257 encode_getattr_three(xdr,
1258 bitmask[0] & nfs4_fsinfo_bitmap[0],
1259 bitmask[1] & nfs4_fsinfo_bitmap[1],
1260 bitmask[2] & nfs4_fsinfo_bitmap[2],
1261 hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278 encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283 if (fl->fl_type == F_RDLCK)
1284 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290 if (fl->fl_end == OFFSET_MAX)
1291 return ~(uint64_t)0;
1292 return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297 __be32 *p;
1298
1299 p = reserve_space(xdr, 32);
1300 p = xdr_encode_hyper(p, lowner->clientid);
1301 *p++ = cpu_to_be32(20);
1302 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303 *p++ = cpu_to_be32(lowner->s_dev);
1304 xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310 */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313 __be32 *p;
1314
1315 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316 p = reserve_space(xdr, 28);
1317 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318 *p++ = cpu_to_be32(args->reclaim);
1319 p = xdr_encode_hyper(p, args->fl->fl_start);
1320 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321 *p = cpu_to_be32(args->new_lock_owner);
1322 if (args->new_lock_owner){
1323 encode_nfs4_seqid(xdr, args->open_seqid);
1324 encode_nfs4_stateid(xdr, &args->open_stateid);
1325 encode_nfs4_seqid(xdr, args->lock_seqid);
1326 encode_lockowner(xdr, &args->lock_owner);
1327 }
1328 else {
1329 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330 encode_nfs4_seqid(xdr, args->lock_seqid);
1331 }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336 __be32 *p;
1337
1338 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339 p = reserve_space(xdr, 20);
1340 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341 p = xdr_encode_hyper(p, args->fl->fl_start);
1342 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343 encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348 __be32 *p;
1349
1350 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352 encode_nfs4_seqid(xdr, args->seqid);
1353 encode_nfs4_stateid(xdr, &args->stateid);
1354 p = reserve_space(xdr, 16);
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362 encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368 encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373 __be32 *p;
1374
1375 p = reserve_space(xdr, 8);
1376 *p++ = cpu_to_be32(share_access);
1377 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382 __be32 *p;
1383 /*
1384 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385 * owner 4 = 32
1386 */
1387 encode_nfs4_seqid(xdr, arg->seqid);
1388 encode_share_access(xdr, arg->share_access);
1389 p = reserve_space(xdr, 36);
1390 p = xdr_encode_hyper(p, arg->clientid);
1391 *p++ = cpu_to_be32(24);
1392 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393 *p++ = cpu_to_be32(arg->server->s_dev);
1394 *p++ = cpu_to_be32(arg->id.uniquifier);
1395 xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 switch(arg->createmode) {
1404 case NFS4_CREATE_UNCHECKED:
1405 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1407 break;
1408 case NFS4_CREATE_GUARDED:
1409 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1410 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1411 break;
1412 case NFS4_CREATE_EXCLUSIVE:
1413 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1414 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415 break;
1416 case NFS4_CREATE_EXCLUSIVE4_1:
1417 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1418 encode_nfs4_verifier(xdr, &arg->u.verifier);
1419 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true);
1420 }
1421 }
1422
1423 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424 {
1425 __be32 *p;
1426
1427 p = reserve_space(xdr, 4);
1428 switch (arg->open_flags & O_CREAT) {
1429 case 0:
1430 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431 break;
1432 default:
1433 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434 encode_createmode(xdr, arg);
1435 }
1436 }
1437
1438 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439 {
1440 __be32 *p;
1441
1442 p = reserve_space(xdr, 4);
1443 switch (delegation_type) {
1444 case 0:
1445 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446 break;
1447 case FMODE_READ:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449 break;
1450 case FMODE_WRITE|FMODE_READ:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452 break;
1453 default:
1454 BUG();
1455 }
1456 }
1457
1458 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459 {
1460 __be32 *p;
1461
1462 p = reserve_space(xdr, 4);
1463 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464 encode_string(xdr, name->len, name->name);
1465 }
1466
1467 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468 {
1469 __be32 *p;
1470
1471 p = reserve_space(xdr, 4);
1472 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473 encode_delegation_type(xdr, type);
1474 }
1475
1476 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477 {
1478 __be32 *p;
1479
1480 p = reserve_space(xdr, 4);
1481 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482 encode_nfs4_stateid(xdr, stateid);
1483 encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_fh(struct xdr_stream *xdr)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492 }
1493
1494 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495 {
1496 __be32 *p;
1497
1498 p = reserve_space(xdr, 4);
1499 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500 encode_nfs4_stateid(xdr, stateid);
1501 }
1502
1503 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504 {
1505 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506 encode_openhdr(xdr, arg);
1507 encode_opentype(xdr, arg);
1508 switch (arg->claim) {
1509 case NFS4_OPEN_CLAIM_NULL:
1510 encode_claim_null(xdr, arg->name);
1511 break;
1512 case NFS4_OPEN_CLAIM_PREVIOUS:
1513 encode_claim_previous(xdr, arg->u.delegation_type);
1514 break;
1515 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517 break;
1518 case NFS4_OPEN_CLAIM_FH:
1519 encode_claim_fh(xdr);
1520 break;
1521 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523 break;
1524 default:
1525 BUG();
1526 }
1527 }
1528
1529 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530 {
1531 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532 encode_nfs4_stateid(xdr, arg->stateid);
1533 encode_nfs4_seqid(xdr, arg->seqid);
1534 }
1535
1536 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537 {
1538 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539 encode_nfs4_stateid(xdr, &arg->stateid);
1540 encode_nfs4_seqid(xdr, arg->seqid);
1541 encode_share_access(xdr, arg->share_access);
1542 }
1543
1544 static void
1545 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546 {
1547 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548 encode_string(xdr, fh->size, fh->data);
1549 }
1550
1551 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552 {
1553 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554 }
1555
1556 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1557 struct compound_hdr *hdr)
1558 {
1559 __be32 *p;
1560
1561 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1562 encode_nfs4_stateid(xdr, &args->stateid);
1563
1564 p = reserve_space(xdr, 12);
1565 p = xdr_encode_hyper(p, args->offset);
1566 *p = cpu_to_be32(args->count);
1567 }
1568
1569 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1570 {
1571 uint32_t attrs[3] = {
1572 FATTR4_WORD0_RDATTR_ERROR,
1573 FATTR4_WORD1_MOUNTED_ON_FILEID,
1574 };
1575 uint32_t dircount = readdir->count >> 1;
1576 __be32 *p, verf[2];
1577 uint32_t attrlen = 0;
1578 unsigned int i;
1579
1580 if (readdir->plus) {
1581 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1582 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1583 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1584 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1585 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1586 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1587 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1588 dircount >>= 1;
1589 }
1590 /* Use mounted_on_fileid only if the server supports it */
1591 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1592 attrs[0] |= FATTR4_WORD0_FILEID;
1593 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1594 attrs[i] &= readdir->bitmask[i];
1595 if (attrs[i] != 0)
1596 attrlen = i+1;
1597 }
1598
1599 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1600 encode_uint64(xdr, readdir->cookie);
1601 encode_nfs4_verifier(xdr, &readdir->verifier);
1602 p = reserve_space(xdr, 12 + (attrlen << 2));
1603 *p++ = cpu_to_be32(dircount);
1604 *p++ = cpu_to_be32(readdir->count);
1605 *p++ = cpu_to_be32(attrlen);
1606 for (i = 0; i < attrlen; i++)
1607 *p++ = cpu_to_be32(attrs[i]);
1608 memcpy(verf, readdir->verifier.data, sizeof(verf));
1609
1610 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1611 __func__,
1612 (unsigned long long)readdir->cookie,
1613 verf[0], verf[1],
1614 attrs[0] & readdir->bitmask[0],
1615 attrs[1] & readdir->bitmask[1],
1616 attrs[2] & readdir->bitmask[2]);
1617 }
1618
1619 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1620 {
1621 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1622 }
1623
1624 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1625 {
1626 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1627 encode_string(xdr, name->len, name->name);
1628 }
1629
1630 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1631 {
1632 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1633 encode_string(xdr, oldname->len, oldname->name);
1634 encode_string(xdr, newname->len, newname->name);
1635 }
1636
1637 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1638 struct compound_hdr *hdr)
1639 {
1640 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1641 encode_uint64(xdr, clid);
1642 }
1643
1644 static void
1645 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1646 {
1647 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1648 }
1649
1650 static void
1651 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1652 {
1653 __be32 *p;
1654
1655 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1656 encode_nfs4_stateid(xdr, &zero_stateid);
1657 p = reserve_space(xdr, 2*4);
1658 *p++ = cpu_to_be32(1);
1659 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1660 p = reserve_space(xdr, 4);
1661 *p = cpu_to_be32(arg->acl_len);
1662 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1663 }
1664
1665 static void
1666 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1669 }
1670
1671 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1672 {
1673 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1674 encode_nfs4_stateid(xdr, &arg->stateid);
1675 encode_attrs(xdr, arg->iap, arg->label, server, false);
1676 }
1677
1678 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1679 {
1680 __be32 *p;
1681
1682 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1683 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1684
1685 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1686 setclientid->sc_clnt->cl_owner_id);
1687 p = reserve_space(xdr, 4);
1688 *p = cpu_to_be32(setclientid->sc_prog);
1689 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1690 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1691 p = reserve_space(xdr, 4);
1692 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1693 }
1694
1695 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1696 {
1697 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1698 decode_setclientid_confirm_maxsz, hdr);
1699 encode_uint64(xdr, arg->clientid);
1700 encode_nfs4_verifier(xdr, &arg->confirm);
1701 }
1702
1703 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1704 struct compound_hdr *hdr)
1705 {
1706 __be32 *p;
1707
1708 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1709 encode_nfs4_stateid(xdr, &args->stateid);
1710
1711 p = reserve_space(xdr, 16);
1712 p = xdr_encode_hyper(p, args->offset);
1713 *p++ = cpu_to_be32(args->stable);
1714 *p = cpu_to_be32(args->count);
1715
1716 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1717 }
1718
1719 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1722 encode_nfs4_stateid(xdr, stateid);
1723 }
1724
1725 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1726 {
1727 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1728 encode_string(xdr, name->len, name->name);
1729 }
1730
1731 #if defined(CONFIG_NFS_V4_1)
1732 /* NFSv4.1 operations */
1733 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1734 struct nfs41_bind_conn_to_session_args *args,
1735 struct compound_hdr *hdr)
1736 {
1737 __be32 *p;
1738
1739 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1740 decode_bind_conn_to_session_maxsz, hdr);
1741 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1742 p = xdr_reserve_space(xdr, 8);
1743 *p++ = cpu_to_be32(args->dir);
1744 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1745 }
1746
1747 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1748 {
1749 unsigned int i;
1750 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1751 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1752 encode_uint32(xdr, op_map->u.words[i]);
1753 }
1754
1755 static void encode_exchange_id(struct xdr_stream *xdr,
1756 struct nfs41_exchange_id_args *args,
1757 struct compound_hdr *hdr)
1758 {
1759 __be32 *p;
1760 char impl_name[IMPL_NAME_LIMIT];
1761 int len = 0;
1762
1763 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1764 encode_nfs4_verifier(xdr, args->verifier);
1765
1766 encode_string(xdr, strlen(args->client->cl_owner_id),
1767 args->client->cl_owner_id);
1768
1769 encode_uint32(xdr, args->flags);
1770 encode_uint32(xdr, args->state_protect.how);
1771
1772 switch (args->state_protect.how) {
1773 case SP4_NONE:
1774 break;
1775 case SP4_MACH_CRED:
1776 encode_op_map(xdr, &args->state_protect.enforce);
1777 encode_op_map(xdr, &args->state_protect.allow);
1778 break;
1779 default:
1780 WARN_ON_ONCE(1);
1781 break;
1782 }
1783
1784 if (send_implementation_id &&
1785 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787 <= sizeof(impl_name) + 1)
1788 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789 utsname()->sysname, utsname()->release,
1790 utsname()->version, utsname()->machine);
1791
1792 if (len > 0) {
1793 encode_uint32(xdr, 1); /* implementation id array length=1 */
1794
1795 encode_string(xdr,
1796 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798 encode_string(xdr, len, impl_name);
1799 /* just send zeros for nii_date - the date is in nii_name */
1800 p = reserve_space(xdr, 12);
1801 p = xdr_encode_hyper(p, 0);
1802 *p = cpu_to_be32(0);
1803 } else
1804 encode_uint32(xdr, 0); /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808 struct nfs41_create_session_args *args,
1809 struct compound_hdr *hdr)
1810 {
1811 __be32 *p;
1812 struct nfs_client *clp = args->client;
1813 struct rpc_clnt *clnt = clp->cl_rpcclient;
1814 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1815 u32 max_resp_sz_cached;
1816
1817 /*
1818 * Assumes OPEN is the biggest non-idempotent compound.
1819 * 2 is the verifier.
1820 */
1821 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1822 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1823
1824 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1825 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1826 p = xdr_encode_hyper(p, args->clientid);
1827 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1828 *p++ = cpu_to_be32(args->flags); /*flags */
1829
1830 /* Fore Channel */
1831 *p++ = cpu_to_be32(0); /* header padding size */
1832 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1833 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1834 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1835 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1837 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1838
1839 /* Back Channel */
1840 *p++ = cpu_to_be32(0); /* header padding size */
1841 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1842 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1843 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1844 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1846 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1847
1848 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1849 *p++ = cpu_to_be32(1);
1850 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1851
1852 /* authsys_parms rfc1831 */
1853 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1854 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1855 *p++ = cpu_to_be32(0); /* UID */
1856 *p++ = cpu_to_be32(0); /* GID */
1857 *p = cpu_to_be32(0); /* No more gids */
1858 }
1859
1860 static void encode_destroy_session(struct xdr_stream *xdr,
1861 struct nfs4_session *session,
1862 struct compound_hdr *hdr)
1863 {
1864 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1865 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866 }
1867
1868 static void encode_destroy_clientid(struct xdr_stream *xdr,
1869 uint64_t clientid,
1870 struct compound_hdr *hdr)
1871 {
1872 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1873 encode_uint64(xdr, clientid);
1874 }
1875
1876 static void encode_reclaim_complete(struct xdr_stream *xdr,
1877 struct nfs41_reclaim_complete_args *args,
1878 struct compound_hdr *hdr)
1879 {
1880 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1881 encode_uint32(xdr, args->one_fs);
1882 }
1883 #endif /* CONFIG_NFS_V4_1 */
1884
1885 static void encode_sequence(struct xdr_stream *xdr,
1886 const struct nfs4_sequence_args *args,
1887 struct compound_hdr *hdr)
1888 {
1889 #if defined(CONFIG_NFS_V4_1)
1890 struct nfs4_session *session;
1891 struct nfs4_slot_table *tp;
1892 struct nfs4_slot *slot = args->sa_slot;
1893 __be32 *p;
1894
1895 tp = slot->table;
1896 session = tp->session;
1897 if (!session)
1898 return;
1899
1900 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1901
1902 /*
1903 * Sessionid + seqid + slotid + max slotid + cache_this
1904 */
1905 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1906 "max_slotid=%d cache_this=%d\n",
1907 __func__,
1908 ((u32 *)session->sess_id.data)[0],
1909 ((u32 *)session->sess_id.data)[1],
1910 ((u32 *)session->sess_id.data)[2],
1911 ((u32 *)session->sess_id.data)[3],
1912 slot->seq_nr, slot->slot_nr,
1913 tp->highest_used_slotid, args->sa_cache_this);
1914 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1915 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1916 *p++ = cpu_to_be32(slot->seq_nr);
1917 *p++ = cpu_to_be32(slot->slot_nr);
1918 *p++ = cpu_to_be32(tp->highest_used_slotid);
1919 *p = cpu_to_be32(args->sa_cache_this);
1920 #endif /* CONFIG_NFS_V4_1 */
1921 }
1922
1923 #ifdef CONFIG_NFS_V4_1
1924 static void
1925 encode_getdeviceinfo(struct xdr_stream *xdr,
1926 const struct nfs4_getdeviceinfo_args *args,
1927 struct compound_hdr *hdr)
1928 {
1929 __be32 *p;
1930
1931 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1932 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1933 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1934 NFS4_DEVICEID4_SIZE);
1935 *p++ = cpu_to_be32(args->pdev->layout_type);
1936 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1937
1938 p = reserve_space(xdr, 4 + 4);
1939 *p++ = cpu_to_be32(1); /* bitmap length */
1940 *p++ = cpu_to_be32(args->notify_types);
1941 }
1942
1943 static void
1944 encode_layoutget(struct xdr_stream *xdr,
1945 const struct nfs4_layoutget_args *args,
1946 struct compound_hdr *hdr)
1947 {
1948 __be32 *p;
1949
1950 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1951 p = reserve_space(xdr, 36);
1952 *p++ = cpu_to_be32(0); /* Signal layout available */
1953 *p++ = cpu_to_be32(args->type);
1954 *p++ = cpu_to_be32(args->range.iomode);
1955 p = xdr_encode_hyper(p, args->range.offset);
1956 p = xdr_encode_hyper(p, args->range.length);
1957 p = xdr_encode_hyper(p, args->minlength);
1958 encode_nfs4_stateid(xdr, &args->stateid);
1959 encode_uint32(xdr, args->maxcount);
1960
1961 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1962 __func__,
1963 args->type,
1964 args->range.iomode,
1965 (unsigned long)args->range.offset,
1966 (unsigned long)args->range.length,
1967 args->maxcount);
1968 }
1969
1970 static int
1971 encode_layoutcommit(struct xdr_stream *xdr,
1972 struct inode *inode,
1973 struct nfs4_layoutcommit_args *args,
1974 struct compound_hdr *hdr)
1975 {
1976 __be32 *p;
1977
1978 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1979 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1980
1981 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1982 p = reserve_space(xdr, 20);
1983 /* Only whole file layouts */
1984 p = xdr_encode_hyper(p, 0); /* offset */
1985 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1986 *p = cpu_to_be32(0); /* reclaim */
1987 encode_nfs4_stateid(xdr, &args->stateid);
1988 if (args->lastbytewritten != U64_MAX) {
1989 p = reserve_space(xdr, 20);
1990 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1991 p = xdr_encode_hyper(p, args->lastbytewritten);
1992 } else {
1993 p = reserve_space(xdr, 12);
1994 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
1995 }
1996 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1997 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1998
1999 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2000 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2001 NFS_I(inode)->layout, xdr, args);
2002 } else {
2003 encode_uint32(xdr, args->layoutupdate_len);
2004 if (args->layoutupdate_pages) {
2005 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2006 args->layoutupdate_len);
2007 }
2008 }
2009
2010 return 0;
2011 }
2012
2013 static void
2014 encode_layoutreturn(struct xdr_stream *xdr,
2015 const struct nfs4_layoutreturn_args *args,
2016 struct compound_hdr *hdr)
2017 {
2018 __be32 *p;
2019
2020 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2021 p = reserve_space(xdr, 16);
2022 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2023 *p++ = cpu_to_be32(args->layout_type);
2024 *p++ = cpu_to_be32(args->range.iomode);
2025 *p = cpu_to_be32(RETURN_FILE);
2026 p = reserve_space(xdr, 16);
2027 p = xdr_encode_hyper(p, args->range.offset);
2028 p = xdr_encode_hyper(p, args->range.length);
2029 spin_lock(&args->inode->i_lock);
2030 encode_nfs4_stateid(xdr, &args->stateid);
2031 spin_unlock(&args->inode->i_lock);
2032 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2033 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2034 NFS_I(args->inode)->layout, xdr, args);
2035 } else
2036 encode_uint32(xdr, 0);
2037 }
2038
2039 static int
2040 encode_secinfo_no_name(struct xdr_stream *xdr,
2041 const struct nfs41_secinfo_no_name_args *args,
2042 struct compound_hdr *hdr)
2043 {
2044 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2045 encode_uint32(xdr, args->style);
2046 return 0;
2047 }
2048
2049 static void encode_test_stateid(struct xdr_stream *xdr,
2050 struct nfs41_test_stateid_args *args,
2051 struct compound_hdr *hdr)
2052 {
2053 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2054 encode_uint32(xdr, 1);
2055 encode_nfs4_stateid(xdr, args->stateid);
2056 }
2057
2058 static void encode_free_stateid(struct xdr_stream *xdr,
2059 struct nfs41_free_stateid_args *args,
2060 struct compound_hdr *hdr)
2061 {
2062 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2063 encode_nfs4_stateid(xdr, &args->stateid);
2064 }
2065 #endif /* CONFIG_NFS_V4_1 */
2066
2067 /*
2068 * END OF "GENERIC" ENCODE ROUTINES.
2069 */
2070
2071 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2072 {
2073 #if defined(CONFIG_NFS_V4_1)
2074 struct nfs4_session *session = args->sa_slot->table->session;
2075 if (session)
2076 return session->clp->cl_mvops->minor_version;
2077 #endif /* CONFIG_NFS_V4_1 */
2078 return 0;
2079 }
2080
2081 /*
2082 * Encode an ACCESS request
2083 */
2084 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2085 const struct nfs4_accessargs *args)
2086 {
2087 struct compound_hdr hdr = {
2088 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2089 };
2090
2091 encode_compound_hdr(xdr, req, &hdr);
2092 encode_sequence(xdr, &args->seq_args, &hdr);
2093 encode_putfh(xdr, args->fh, &hdr);
2094 encode_access(xdr, args->access, &hdr);
2095 encode_getfattr(xdr, args->bitmask, &hdr);
2096 encode_nops(&hdr);
2097 }
2098
2099 /*
2100 * Encode LOOKUP request
2101 */
2102 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2103 const struct nfs4_lookup_arg *args)
2104 {
2105 struct compound_hdr hdr = {
2106 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107 };
2108
2109 encode_compound_hdr(xdr, req, &hdr);
2110 encode_sequence(xdr, &args->seq_args, &hdr);
2111 encode_putfh(xdr, args->dir_fh, &hdr);
2112 encode_lookup(xdr, args->name, &hdr);
2113 encode_getfh(xdr, &hdr);
2114 encode_getfattr(xdr, args->bitmask, &hdr);
2115 encode_nops(&hdr);
2116 }
2117
2118 /*
2119 * Encode LOOKUP_ROOT request
2120 */
2121 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2122 struct xdr_stream *xdr,
2123 const struct nfs4_lookup_root_arg *args)
2124 {
2125 struct compound_hdr hdr = {
2126 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127 };
2128
2129 encode_compound_hdr(xdr, req, &hdr);
2130 encode_sequence(xdr, &args->seq_args, &hdr);
2131 encode_putrootfh(xdr, &hdr);
2132 encode_getfh(xdr, &hdr);
2133 encode_getfattr(xdr, args->bitmask, &hdr);
2134 encode_nops(&hdr);
2135 }
2136
2137 /*
2138 * Encode REMOVE request
2139 */
2140 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2141 const struct nfs_removeargs *args)
2142 {
2143 struct compound_hdr hdr = {
2144 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145 };
2146
2147 encode_compound_hdr(xdr, req, &hdr);
2148 encode_sequence(xdr, &args->seq_args, &hdr);
2149 encode_putfh(xdr, args->fh, &hdr);
2150 encode_remove(xdr, &args->name, &hdr);
2151 encode_nops(&hdr);
2152 }
2153
2154 /*
2155 * Encode RENAME request
2156 */
2157 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2158 const struct nfs_renameargs *args)
2159 {
2160 struct compound_hdr hdr = {
2161 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2162 };
2163
2164 encode_compound_hdr(xdr, req, &hdr);
2165 encode_sequence(xdr, &args->seq_args, &hdr);
2166 encode_putfh(xdr, args->old_dir, &hdr);
2167 encode_savefh(xdr, &hdr);
2168 encode_putfh(xdr, args->new_dir, &hdr);
2169 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2170 encode_nops(&hdr);
2171 }
2172
2173 /*
2174 * Encode LINK request
2175 */
2176 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2177 const struct nfs4_link_arg *args)
2178 {
2179 struct compound_hdr hdr = {
2180 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181 };
2182
2183 encode_compound_hdr(xdr, req, &hdr);
2184 encode_sequence(xdr, &args->seq_args, &hdr);
2185 encode_putfh(xdr, args->fh, &hdr);
2186 encode_savefh(xdr, &hdr);
2187 encode_putfh(xdr, args->dir_fh, &hdr);
2188 encode_link(xdr, args->name, &hdr);
2189 encode_restorefh(xdr, &hdr);
2190 encode_getfattr(xdr, args->bitmask, &hdr);
2191 encode_nops(&hdr);
2192 }
2193
2194 /*
2195 * Encode CREATE request
2196 */
2197 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2198 const struct nfs4_create_arg *args)
2199 {
2200 struct compound_hdr hdr = {
2201 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202 };
2203
2204 encode_compound_hdr(xdr, req, &hdr);
2205 encode_sequence(xdr, &args->seq_args, &hdr);
2206 encode_putfh(xdr, args->dir_fh, &hdr);
2207 encode_create(xdr, args, &hdr);
2208 encode_getfh(xdr, &hdr);
2209 encode_getfattr(xdr, args->bitmask, &hdr);
2210 encode_nops(&hdr);
2211 }
2212
2213 /*
2214 * Encode SYMLINK request
2215 */
2216 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2217 const struct nfs4_create_arg *args)
2218 {
2219 nfs4_xdr_enc_create(req, xdr, args);
2220 }
2221
2222 /*
2223 * Encode GETATTR request
2224 */
2225 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_getattr_arg *args)
2227 {
2228 struct compound_hdr hdr = {
2229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230 };
2231
2232 encode_compound_hdr(xdr, req, &hdr);
2233 encode_sequence(xdr, &args->seq_args, &hdr);
2234 encode_putfh(xdr, args->fh, &hdr);
2235 encode_getfattr(xdr, args->bitmask, &hdr);
2236 encode_nops(&hdr);
2237 }
2238
2239 /*
2240 * Encode a CLOSE request
2241 */
2242 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2243 struct nfs_closeargs *args)
2244 {
2245 struct compound_hdr hdr = {
2246 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247 };
2248
2249 encode_compound_hdr(xdr, req, &hdr);
2250 encode_sequence(xdr, &args->seq_args, &hdr);
2251 encode_putfh(xdr, args->fh, &hdr);
2252 encode_close(xdr, args, &hdr);
2253 encode_getfattr(xdr, args->bitmask, &hdr);
2254 encode_nops(&hdr);
2255 }
2256
2257 /*
2258 * Encode an OPEN request
2259 */
2260 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2261 struct nfs_openargs *args)
2262 {
2263 struct compound_hdr hdr = {
2264 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265 };
2266
2267 encode_compound_hdr(xdr, req, &hdr);
2268 encode_sequence(xdr, &args->seq_args, &hdr);
2269 encode_putfh(xdr, args->fh, &hdr);
2270 encode_open(xdr, args, &hdr);
2271 encode_getfh(xdr, &hdr);
2272 if (args->access)
2273 encode_access(xdr, args->access, &hdr);
2274 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2275 encode_nops(&hdr);
2276 }
2277
2278 /*
2279 * Encode an OPEN_CONFIRM request
2280 */
2281 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2282 struct xdr_stream *xdr,
2283 struct nfs_open_confirmargs *args)
2284 {
2285 struct compound_hdr hdr = {
2286 .nops = 0,
2287 };
2288
2289 encode_compound_hdr(xdr, req, &hdr);
2290 encode_putfh(xdr, args->fh, &hdr);
2291 encode_open_confirm(xdr, args, &hdr);
2292 encode_nops(&hdr);
2293 }
2294
2295 /*
2296 * Encode an OPEN request with no attributes.
2297 */
2298 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2299 struct xdr_stream *xdr,
2300 struct nfs_openargs *args)
2301 {
2302 struct compound_hdr hdr = {
2303 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2304 };
2305
2306 encode_compound_hdr(xdr, req, &hdr);
2307 encode_sequence(xdr, &args->seq_args, &hdr);
2308 encode_putfh(xdr, args->fh, &hdr);
2309 encode_open(xdr, args, &hdr);
2310 if (args->access)
2311 encode_access(xdr, args->access, &hdr);
2312 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2313 encode_nops(&hdr);
2314 }
2315
2316 /*
2317 * Encode an OPEN_DOWNGRADE request
2318 */
2319 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2320 struct xdr_stream *xdr,
2321 struct nfs_closeargs *args)
2322 {
2323 struct compound_hdr hdr = {
2324 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325 };
2326
2327 encode_compound_hdr(xdr, req, &hdr);
2328 encode_sequence(xdr, &args->seq_args, &hdr);
2329 encode_putfh(xdr, args->fh, &hdr);
2330 encode_open_downgrade(xdr, args, &hdr);
2331 encode_getfattr(xdr, args->bitmask, &hdr);
2332 encode_nops(&hdr);
2333 }
2334
2335 /*
2336 * Encode a LOCK request
2337 */
2338 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2339 struct nfs_lock_args *args)
2340 {
2341 struct compound_hdr hdr = {
2342 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2343 };
2344
2345 encode_compound_hdr(xdr, req, &hdr);
2346 encode_sequence(xdr, &args->seq_args, &hdr);
2347 encode_putfh(xdr, args->fh, &hdr);
2348 encode_lock(xdr, args, &hdr);
2349 encode_nops(&hdr);
2350 }
2351
2352 /*
2353 * Encode a LOCKT request
2354 */
2355 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2356 struct nfs_lockt_args *args)
2357 {
2358 struct compound_hdr hdr = {
2359 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2360 };
2361
2362 encode_compound_hdr(xdr, req, &hdr);
2363 encode_sequence(xdr, &args->seq_args, &hdr);
2364 encode_putfh(xdr, args->fh, &hdr);
2365 encode_lockt(xdr, args, &hdr);
2366 encode_nops(&hdr);
2367 }
2368
2369 /*
2370 * Encode a LOCKU request
2371 */
2372 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2373 struct nfs_locku_args *args)
2374 {
2375 struct compound_hdr hdr = {
2376 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2377 };
2378
2379 encode_compound_hdr(xdr, req, &hdr);
2380 encode_sequence(xdr, &args->seq_args, &hdr);
2381 encode_putfh(xdr, args->fh, &hdr);
2382 encode_locku(xdr, args, &hdr);
2383 encode_nops(&hdr);
2384 }
2385
2386 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2387 struct xdr_stream *xdr,
2388 struct nfs_release_lockowner_args *args)
2389 {
2390 struct compound_hdr hdr = {
2391 .minorversion = 0,
2392 };
2393
2394 encode_compound_hdr(xdr, req, &hdr);
2395 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2396 encode_nops(&hdr);
2397 }
2398
2399 /*
2400 * Encode a READLINK request
2401 */
2402 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2403 const struct nfs4_readlink *args)
2404 {
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_readlink(xdr, args, req, &hdr);
2413
2414 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2415 args->pgbase, args->pglen);
2416 encode_nops(&hdr);
2417 }
2418
2419 /*
2420 * Encode a READDIR request
2421 */
2422 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2423 const struct nfs4_readdir_arg *args)
2424 {
2425 struct compound_hdr hdr = {
2426 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427 };
2428
2429 encode_compound_hdr(xdr, req, &hdr);
2430 encode_sequence(xdr, &args->seq_args, &hdr);
2431 encode_putfh(xdr, args->fh, &hdr);
2432 encode_readdir(xdr, args, req, &hdr);
2433
2434 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2435 args->pgbase, args->count);
2436 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2437 __func__, hdr.replen << 2, args->pages,
2438 args->pgbase, args->count);
2439 encode_nops(&hdr);
2440 }
2441
2442 /*
2443 * Encode a READ request
2444 */
2445 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2446 struct nfs_pgio_args *args)
2447 {
2448 struct compound_hdr hdr = {
2449 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2450 };
2451
2452 encode_compound_hdr(xdr, req, &hdr);
2453 encode_sequence(xdr, &args->seq_args, &hdr);
2454 encode_putfh(xdr, args->fh, &hdr);
2455 encode_read(xdr, args, &hdr);
2456
2457 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2458 args->pages, args->pgbase, args->count);
2459 req->rq_rcv_buf.flags |= XDRBUF_READ;
2460 encode_nops(&hdr);
2461 }
2462
2463 /*
2464 * Encode an SETATTR request
2465 */
2466 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2467 struct nfs_setattrargs *args)
2468 {
2469 struct compound_hdr hdr = {
2470 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2471 };
2472
2473 encode_compound_hdr(xdr, req, &hdr);
2474 encode_sequence(xdr, &args->seq_args, &hdr);
2475 encode_putfh(xdr, args->fh, &hdr);
2476 encode_setattr(xdr, args, args->server, &hdr);
2477 encode_getfattr(xdr, args->bitmask, &hdr);
2478 encode_nops(&hdr);
2479 }
2480
2481 /*
2482 * Encode a GETACL request
2483 */
2484 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2485 struct nfs_getaclargs *args)
2486 {
2487 struct compound_hdr hdr = {
2488 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2489 };
2490 uint32_t replen;
2491
2492 encode_compound_hdr(xdr, req, &hdr);
2493 encode_sequence(xdr, &args->seq_args, &hdr);
2494 encode_putfh(xdr, args->fh, &hdr);
2495 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2496 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2497
2498 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2499 args->acl_pages, 0, args->acl_len);
2500
2501 encode_nops(&hdr);
2502 }
2503
2504 /*
2505 * Encode a WRITE request
2506 */
2507 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2508 struct nfs_pgio_args *args)
2509 {
2510 struct compound_hdr hdr = {
2511 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2512 };
2513
2514 encode_compound_hdr(xdr, req, &hdr);
2515 encode_sequence(xdr, &args->seq_args, &hdr);
2516 encode_putfh(xdr, args->fh, &hdr);
2517 encode_write(xdr, args, &hdr);
2518 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2519 if (args->bitmask)
2520 encode_getfattr(xdr, args->bitmask, &hdr);
2521 encode_nops(&hdr);
2522 }
2523
2524 /*
2525 * a COMMIT request
2526 */
2527 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2528 struct nfs_commitargs *args)
2529 {
2530 struct compound_hdr hdr = {
2531 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2532 };
2533
2534 encode_compound_hdr(xdr, req, &hdr);
2535 encode_sequence(xdr, &args->seq_args, &hdr);
2536 encode_putfh(xdr, args->fh, &hdr);
2537 encode_commit(xdr, args, &hdr);
2538 encode_nops(&hdr);
2539 }
2540
2541 /*
2542 * FSINFO request
2543 */
2544 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2545 struct nfs4_fsinfo_arg *args)
2546 {
2547 struct compound_hdr hdr = {
2548 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2549 };
2550
2551 encode_compound_hdr(xdr, req, &hdr);
2552 encode_sequence(xdr, &args->seq_args, &hdr);
2553 encode_putfh(xdr, args->fh, &hdr);
2554 encode_fsinfo(xdr, args->bitmask, &hdr);
2555 encode_nops(&hdr);
2556 }
2557
2558 /*
2559 * a PATHCONF request
2560 */
2561 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2562 const struct nfs4_pathconf_arg *args)
2563 {
2564 struct compound_hdr hdr = {
2565 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2566 };
2567
2568 encode_compound_hdr(xdr, req, &hdr);
2569 encode_sequence(xdr, &args->seq_args, &hdr);
2570 encode_putfh(xdr, args->fh, &hdr);
2571 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2572 &hdr);
2573 encode_nops(&hdr);
2574 }
2575
2576 /*
2577 * a STATFS request
2578 */
2579 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2580 const struct nfs4_statfs_arg *args)
2581 {
2582 struct compound_hdr hdr = {
2583 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2584 };
2585
2586 encode_compound_hdr(xdr, req, &hdr);
2587 encode_sequence(xdr, &args->seq_args, &hdr);
2588 encode_putfh(xdr, args->fh, &hdr);
2589 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2590 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2591 encode_nops(&hdr);
2592 }
2593
2594 /*
2595 * GETATTR_BITMAP request
2596 */
2597 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2598 struct xdr_stream *xdr,
2599 struct nfs4_server_caps_arg *args)
2600 {
2601 const u32 *bitmask = args->bitmask;
2602 struct compound_hdr hdr = {
2603 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604 };
2605
2606 encode_compound_hdr(xdr, req, &hdr);
2607 encode_sequence(xdr, &args->seq_args, &hdr);
2608 encode_putfh(xdr, args->fhandle, &hdr);
2609 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2610 encode_nops(&hdr);
2611 }
2612
2613 /*
2614 * a RENEW request
2615 */
2616 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2617 struct nfs_client *clp)
2618 {
2619 struct compound_hdr hdr = {
2620 .nops = 0,
2621 };
2622
2623 encode_compound_hdr(xdr, req, &hdr);
2624 encode_renew(xdr, clp->cl_clientid, &hdr);
2625 encode_nops(&hdr);
2626 }
2627
2628 /*
2629 * a SETCLIENTID request
2630 */
2631 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2632 struct xdr_stream *xdr,
2633 struct nfs4_setclientid *sc)
2634 {
2635 struct compound_hdr hdr = {
2636 .nops = 0,
2637 };
2638
2639 encode_compound_hdr(xdr, req, &hdr);
2640 encode_setclientid(xdr, sc, &hdr);
2641 encode_nops(&hdr);
2642 }
2643
2644 /*
2645 * a SETCLIENTID_CONFIRM request
2646 */
2647 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2648 struct xdr_stream *xdr,
2649 struct nfs4_setclientid_res *arg)
2650 {
2651 struct compound_hdr hdr = {
2652 .nops = 0,
2653 };
2654
2655 encode_compound_hdr(xdr, req, &hdr);
2656 encode_setclientid_confirm(xdr, arg, &hdr);
2657 encode_nops(&hdr);
2658 }
2659
2660 /*
2661 * DELEGRETURN request
2662 */
2663 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 const struct nfs4_delegreturnargs *args)
2666 {
2667 struct compound_hdr hdr = {
2668 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669 };
2670
2671 encode_compound_hdr(xdr, req, &hdr);
2672 encode_sequence(xdr, &args->seq_args, &hdr);
2673 encode_putfh(xdr, args->fhandle, &hdr);
2674 encode_getfattr(xdr, args->bitmask, &hdr);
2675 encode_delegreturn(xdr, args->stateid, &hdr);
2676 encode_nops(&hdr);
2677 }
2678
2679 /*
2680 * Encode FS_LOCATIONS request
2681 */
2682 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2683 struct xdr_stream *xdr,
2684 struct nfs4_fs_locations_arg *args)
2685 {
2686 struct compound_hdr hdr = {
2687 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2688 };
2689 uint32_t replen;
2690
2691 encode_compound_hdr(xdr, req, &hdr);
2692 encode_sequence(xdr, &args->seq_args, &hdr);
2693 if (args->migration) {
2694 encode_putfh(xdr, args->fh, &hdr);
2695 replen = hdr.replen;
2696 encode_fs_locations(xdr, args->bitmask, &hdr);
2697 if (args->renew)
2698 encode_renew(xdr, args->clientid, &hdr);
2699 } else {
2700 encode_putfh(xdr, args->dir_fh, &hdr);
2701 encode_lookup(xdr, args->name, &hdr);
2702 replen = hdr.replen;
2703 encode_fs_locations(xdr, args->bitmask, &hdr);
2704 }
2705
2706 /* Set up reply kvec to capture returned fs_locations array. */
2707 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2708 0, PAGE_SIZE);
2709 encode_nops(&hdr);
2710 }
2711
2712 /*
2713 * Encode SECINFO request
2714 */
2715 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2716 struct xdr_stream *xdr,
2717 struct nfs4_secinfo_arg *args)
2718 {
2719 struct compound_hdr hdr = {
2720 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2721 };
2722
2723 encode_compound_hdr(xdr, req, &hdr);
2724 encode_sequence(xdr, &args->seq_args, &hdr);
2725 encode_putfh(xdr, args->dir_fh, &hdr);
2726 encode_secinfo(xdr, args->name, &hdr);
2727 encode_nops(&hdr);
2728 }
2729
2730 /*
2731 * Encode FSID_PRESENT request
2732 */
2733 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2734 struct xdr_stream *xdr,
2735 struct nfs4_fsid_present_arg *args)
2736 {
2737 struct compound_hdr hdr = {
2738 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2739 };
2740
2741 encode_compound_hdr(xdr, req, &hdr);
2742 encode_sequence(xdr, &args->seq_args, &hdr);
2743 encode_putfh(xdr, args->fh, &hdr);
2744 encode_getfh(xdr, &hdr);
2745 if (args->renew)
2746 encode_renew(xdr, args->clientid, &hdr);
2747 encode_nops(&hdr);
2748 }
2749
2750 #if defined(CONFIG_NFS_V4_1)
2751 /*
2752 * BIND_CONN_TO_SESSION request
2753 */
2754 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2755 struct xdr_stream *xdr,
2756 struct nfs41_bind_conn_to_session_args *args)
2757 {
2758 struct compound_hdr hdr = {
2759 .minorversion = args->client->cl_mvops->minor_version,
2760 };
2761
2762 encode_compound_hdr(xdr, req, &hdr);
2763 encode_bind_conn_to_session(xdr, args, &hdr);
2764 encode_nops(&hdr);
2765 }
2766
2767 /*
2768 * EXCHANGE_ID request
2769 */
2770 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2771 struct xdr_stream *xdr,
2772 struct nfs41_exchange_id_args *args)
2773 {
2774 struct compound_hdr hdr = {
2775 .minorversion = args->client->cl_mvops->minor_version,
2776 };
2777
2778 encode_compound_hdr(xdr, req, &hdr);
2779 encode_exchange_id(xdr, args, &hdr);
2780 encode_nops(&hdr);
2781 }
2782
2783 /*
2784 * a CREATE_SESSION request
2785 */
2786 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2787 struct xdr_stream *xdr,
2788 struct nfs41_create_session_args *args)
2789 {
2790 struct compound_hdr hdr = {
2791 .minorversion = args->client->cl_mvops->minor_version,
2792 };
2793
2794 encode_compound_hdr(xdr, req, &hdr);
2795 encode_create_session(xdr, args, &hdr);
2796 encode_nops(&hdr);
2797 }
2798
2799 /*
2800 * a DESTROY_SESSION request
2801 */
2802 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2803 struct xdr_stream *xdr,
2804 struct nfs4_session *session)
2805 {
2806 struct compound_hdr hdr = {
2807 .minorversion = session->clp->cl_mvops->minor_version,
2808 };
2809
2810 encode_compound_hdr(xdr, req, &hdr);
2811 encode_destroy_session(xdr, session, &hdr);
2812 encode_nops(&hdr);
2813 }
2814
2815 /*
2816 * a DESTROY_CLIENTID request
2817 */
2818 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2819 struct xdr_stream *xdr,
2820 struct nfs_client *clp)
2821 {
2822 struct compound_hdr hdr = {
2823 .minorversion = clp->cl_mvops->minor_version,
2824 };
2825
2826 encode_compound_hdr(xdr, req, &hdr);
2827 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2828 encode_nops(&hdr);
2829 }
2830
2831 /*
2832 * a SEQUENCE request
2833 */
2834 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2835 struct nfs4_sequence_args *args)
2836 {
2837 struct compound_hdr hdr = {
2838 .minorversion = nfs4_xdr_minorversion(args),
2839 };
2840
2841 encode_compound_hdr(xdr, req, &hdr);
2842 encode_sequence(xdr, args, &hdr);
2843 encode_nops(&hdr);
2844 }
2845
2846 /*
2847 * a GET_LEASE_TIME request
2848 */
2849 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2850 struct xdr_stream *xdr,
2851 struct nfs4_get_lease_time_args *args)
2852 {
2853 struct compound_hdr hdr = {
2854 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2855 };
2856 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2857
2858 encode_compound_hdr(xdr, req, &hdr);
2859 encode_sequence(xdr, &args->la_seq_args, &hdr);
2860 encode_putrootfh(xdr, &hdr);
2861 encode_fsinfo(xdr, lease_bitmap, &hdr);
2862 encode_nops(&hdr);
2863 }
2864
2865 /*
2866 * a RECLAIM_COMPLETE request
2867 */
2868 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2869 struct xdr_stream *xdr,
2870 struct nfs41_reclaim_complete_args *args)
2871 {
2872 struct compound_hdr hdr = {
2873 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2874 };
2875
2876 encode_compound_hdr(xdr, req, &hdr);
2877 encode_sequence(xdr, &args->seq_args, &hdr);
2878 encode_reclaim_complete(xdr, args, &hdr);
2879 encode_nops(&hdr);
2880 }
2881
2882 /*
2883 * Encode GETDEVICEINFO request
2884 */
2885 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2886 struct xdr_stream *xdr,
2887 struct nfs4_getdeviceinfo_args *args)
2888 {
2889 struct compound_hdr hdr = {
2890 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891 };
2892
2893 encode_compound_hdr(xdr, req, &hdr);
2894 encode_sequence(xdr, &args->seq_args, &hdr);
2895 encode_getdeviceinfo(xdr, args, &hdr);
2896
2897 /* set up reply kvec. Subtract notification bitmap max size (2)
2898 * so that notification bitmap is put in xdr_buf tail */
2899 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2900 args->pdev->pages, args->pdev->pgbase,
2901 args->pdev->pglen);
2902
2903 encode_nops(&hdr);
2904 }
2905
2906 /*
2907 * Encode LAYOUTGET request
2908 */
2909 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2910 struct xdr_stream *xdr,
2911 struct nfs4_layoutget_args *args)
2912 {
2913 struct compound_hdr hdr = {
2914 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915 };
2916
2917 encode_compound_hdr(xdr, req, &hdr);
2918 encode_sequence(xdr, &args->seq_args, &hdr);
2919 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2920 encode_layoutget(xdr, args, &hdr);
2921
2922 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2923 args->layout.pages, 0, args->layout.pglen);
2924
2925 encode_nops(&hdr);
2926 }
2927
2928 /*
2929 * Encode LAYOUTCOMMIT request
2930 */
2931 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2932 struct xdr_stream *xdr,
2933 struct nfs4_layoutcommit_args *args)
2934 {
2935 struct nfs4_layoutcommit_data *data =
2936 container_of(args, struct nfs4_layoutcommit_data, args);
2937 struct compound_hdr hdr = {
2938 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939 };
2940
2941 encode_compound_hdr(xdr, req, &hdr);
2942 encode_sequence(xdr, &args->seq_args, &hdr);
2943 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2945 encode_getfattr(xdr, args->bitmask, &hdr);
2946 encode_nops(&hdr);
2947 }
2948
2949 /*
2950 * Encode LAYOUTRETURN request
2951 */
2952 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2953 struct xdr_stream *xdr,
2954 struct nfs4_layoutreturn_args *args)
2955 {
2956 struct compound_hdr hdr = {
2957 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2958 };
2959
2960 encode_compound_hdr(xdr, req, &hdr);
2961 encode_sequence(xdr, &args->seq_args, &hdr);
2962 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2963 encode_layoutreturn(xdr, args, &hdr);
2964 encode_nops(&hdr);
2965 }
2966
2967 /*
2968 * Encode SECINFO_NO_NAME request
2969 */
2970 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2971 struct xdr_stream *xdr,
2972 struct nfs41_secinfo_no_name_args *args)
2973 {
2974 struct compound_hdr hdr = {
2975 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976 };
2977
2978 encode_compound_hdr(xdr, req, &hdr);
2979 encode_sequence(xdr, &args->seq_args, &hdr);
2980 encode_putrootfh(xdr, &hdr);
2981 encode_secinfo_no_name(xdr, args, &hdr);
2982 encode_nops(&hdr);
2983 return 0;
2984 }
2985
2986 /*
2987 * Encode TEST_STATEID request
2988 */
2989 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2990 struct xdr_stream *xdr,
2991 struct nfs41_test_stateid_args *args)
2992 {
2993 struct compound_hdr hdr = {
2994 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2995 };
2996
2997 encode_compound_hdr(xdr, req, &hdr);
2998 encode_sequence(xdr, &args->seq_args, &hdr);
2999 encode_test_stateid(xdr, args, &hdr);
3000 encode_nops(&hdr);
3001 }
3002
3003 /*
3004 * Encode FREE_STATEID request
3005 */
3006 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3007 struct xdr_stream *xdr,
3008 struct nfs41_free_stateid_args *args)
3009 {
3010 struct compound_hdr hdr = {
3011 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012 };
3013
3014 encode_compound_hdr(xdr, req, &hdr);
3015 encode_sequence(xdr, &args->seq_args, &hdr);
3016 encode_free_stateid(xdr, args, &hdr);
3017 encode_nops(&hdr);
3018 }
3019 #endif /* CONFIG_NFS_V4_1 */
3020
3021 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3022 {
3023 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3024 "Remaining buffer length is %tu words.\n",
3025 func, xdr->end - xdr->p);
3026 }
3027
3028 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3029 {
3030 __be32 *p;
3031
3032 p = xdr_inline_decode(xdr, 4);
3033 if (unlikely(!p))
3034 goto out_overflow;
3035 *len = be32_to_cpup(p);
3036 p = xdr_inline_decode(xdr, *len);
3037 if (unlikely(!p))
3038 goto out_overflow;
3039 *string = (char *)p;
3040 return 0;
3041 out_overflow:
3042 print_overflow_msg(__func__, xdr);
3043 return -EIO;
3044 }
3045
3046 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3047 {
3048 __be32 *p;
3049
3050 p = xdr_inline_decode(xdr, 8);
3051 if (unlikely(!p))
3052 goto out_overflow;
3053 hdr->status = be32_to_cpup(p++);
3054 hdr->taglen = be32_to_cpup(p);
3055
3056 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3057 if (unlikely(!p))
3058 goto out_overflow;
3059 hdr->tag = (char *)p;
3060 p += XDR_QUADLEN(hdr->taglen);
3061 hdr->nops = be32_to_cpup(p);
3062 if (unlikely(hdr->nops < 1))
3063 return nfs4_stat_to_errno(hdr->status);
3064 return 0;
3065 out_overflow:
3066 print_overflow_msg(__func__, xdr);
3067 return -EIO;
3068 }
3069
3070 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3071 int *nfs_retval)
3072 {
3073 __be32 *p;
3074 uint32_t opnum;
3075 int32_t nfserr;
3076
3077 p = xdr_inline_decode(xdr, 8);
3078 if (unlikely(!p))
3079 goto out_overflow;
3080 opnum = be32_to_cpup(p++);
3081 if (unlikely(opnum != expected))
3082 goto out_bad_operation;
3083 nfserr = be32_to_cpup(p);
3084 if (nfserr == NFS_OK)
3085 *nfs_retval = 0;
3086 else
3087 *nfs_retval = nfs4_stat_to_errno(nfserr);
3088 return true;
3089 out_bad_operation:
3090 dprintk("nfs: Server returned operation"
3091 " %d but we issued a request for %d\n",
3092 opnum, expected);
3093 *nfs_retval = -EREMOTEIO;
3094 return false;
3095 out_overflow:
3096 print_overflow_msg(__func__, xdr);
3097 *nfs_retval = -EIO;
3098 return false;
3099 }
3100
3101 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3102 {
3103 int retval;
3104
3105 __decode_op_hdr(xdr, expected, &retval);
3106 return retval;
3107 }
3108
3109 /* Dummy routine */
3110 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3111 {
3112 __be32 *p;
3113 unsigned int strlen;
3114 char *str;
3115
3116 p = xdr_inline_decode(xdr, 12);
3117 if (likely(p))
3118 return decode_opaque_inline(xdr, &strlen, &str);
3119 print_overflow_msg(__func__, xdr);
3120 return -EIO;
3121 }
3122
3123 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3124 {
3125 uint32_t bmlen;
3126 __be32 *p;
3127
3128 p = xdr_inline_decode(xdr, 4);
3129 if (unlikely(!p))
3130 goto out_overflow;
3131 bmlen = be32_to_cpup(p);
3132
3133 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3134 p = xdr_inline_decode(xdr, (bmlen << 2));
3135 if (unlikely(!p))
3136 goto out_overflow;
3137 if (bmlen > 0) {
3138 bitmap[0] = be32_to_cpup(p++);
3139 if (bmlen > 1) {
3140 bitmap[1] = be32_to_cpup(p++);
3141 if (bmlen > 2)
3142 bitmap[2] = be32_to_cpup(p);
3143 }
3144 }
3145 return 0;
3146 out_overflow:
3147 print_overflow_msg(__func__, xdr);
3148 return -EIO;
3149 }
3150
3151 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3152 {
3153 __be32 *p;
3154
3155 p = xdr_inline_decode(xdr, 4);
3156 if (unlikely(!p))
3157 goto out_overflow;
3158 *attrlen = be32_to_cpup(p);
3159 *savep = xdr_stream_pos(xdr);
3160 return 0;
3161 out_overflow:
3162 print_overflow_msg(__func__, xdr);
3163 return -EIO;
3164 }
3165
3166 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3167 {
3168 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3169 int ret;
3170 ret = decode_attr_bitmap(xdr, bitmask);
3171 if (unlikely(ret < 0))
3172 return ret;
3173 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3174 } else
3175 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3176 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3177 bitmask[0], bitmask[1], bitmask[2]);
3178 return 0;
3179 }
3180
3181 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3182 {
3183 __be32 *p;
3184 int ret = 0;
3185
3186 *type = 0;
3187 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3188 return -EIO;
3189 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3190 p = xdr_inline_decode(xdr, 4);
3191 if (unlikely(!p))
3192 goto out_overflow;
3193 *type = be32_to_cpup(p);
3194 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3195 dprintk("%s: bad type %d\n", __func__, *type);
3196 return -EIO;
3197 }
3198 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3199 ret = NFS_ATTR_FATTR_TYPE;
3200 }
3201 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3202 return ret;
3203 out_overflow:
3204 print_overflow_msg(__func__, xdr);
3205 return -EIO;
3206 }
3207
3208 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3209 uint32_t *bitmap, uint32_t *type)
3210 {
3211 __be32 *p;
3212
3213 *type = 0;
3214 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3215 return -EIO;
3216 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3217 p = xdr_inline_decode(xdr, 4);
3218 if (unlikely(!p))
3219 goto out_overflow;
3220 *type = be32_to_cpup(p);
3221 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3222 }
3223 dprintk("%s: expire type=0x%x\n", __func__, *type);
3224 return 0;
3225 out_overflow:
3226 print_overflow_msg(__func__, xdr);
3227 return -EIO;
3228 }
3229
3230 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3231 {
3232 __be32 *p;
3233 int ret = 0;
3234
3235 *change = 0;
3236 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3237 return -EIO;
3238 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3239 p = xdr_inline_decode(xdr, 8);
3240 if (unlikely(!p))
3241 goto out_overflow;
3242 xdr_decode_hyper(p, change);
3243 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3244 ret = NFS_ATTR_FATTR_CHANGE;
3245 }
3246 dprintk("%s: change attribute=%Lu\n", __func__,
3247 (unsigned long long)*change);
3248 return ret;
3249 out_overflow:
3250 print_overflow_msg(__func__, xdr);
3251 return -EIO;
3252 }
3253
3254 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3255 {
3256 __be32 *p;
3257 int ret = 0;
3258
3259 *size = 0;
3260 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3261 return -EIO;
3262 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3263 p = xdr_inline_decode(xdr, 8);
3264 if (unlikely(!p))
3265 goto out_overflow;
3266 xdr_decode_hyper(p, size);
3267 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3268 ret = NFS_ATTR_FATTR_SIZE;
3269 }
3270 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3271 return ret;
3272 out_overflow:
3273 print_overflow_msg(__func__, xdr);
3274 return -EIO;
3275 }
3276
3277 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3278 {
3279 __be32 *p;
3280
3281 *res = 0;
3282 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3283 return -EIO;
3284 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3285 p = xdr_inline_decode(xdr, 4);
3286 if (unlikely(!p))
3287 goto out_overflow;
3288 *res = be32_to_cpup(p);
3289 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3290 }
3291 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3292 return 0;
3293 out_overflow:
3294 print_overflow_msg(__func__, xdr);
3295 return -EIO;
3296 }
3297
3298 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3299 {
3300 __be32 *p;
3301
3302 *res = 0;
3303 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3304 return -EIO;
3305 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3306 p = xdr_inline_decode(xdr, 4);
3307 if (unlikely(!p))
3308 goto out_overflow;
3309 *res = be32_to_cpup(p);
3310 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3311 }
3312 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3313 return 0;
3314 out_overflow:
3315 print_overflow_msg(__func__, xdr);
3316 return -EIO;
3317 }
3318
3319 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3320 {
3321 __be32 *p;
3322 int ret = 0;
3323
3324 fsid->major = 0;
3325 fsid->minor = 0;
3326 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3327 return -EIO;
3328 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3329 p = xdr_inline_decode(xdr, 16);
3330 if (unlikely(!p))
3331 goto out_overflow;
3332 p = xdr_decode_hyper(p, &fsid->major);
3333 xdr_decode_hyper(p, &fsid->minor);
3334 bitmap[0] &= ~FATTR4_WORD0_FSID;
3335 ret = NFS_ATTR_FATTR_FSID;
3336 }
3337 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3338 (unsigned long long)fsid->major,
3339 (unsigned long long)fsid->minor);
3340 return ret;
3341 out_overflow:
3342 print_overflow_msg(__func__, xdr);
3343 return -EIO;
3344 }
3345
3346 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3347 {
3348 __be32 *p;
3349
3350 *res = 60;
3351 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3352 return -EIO;
3353 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3354 p = xdr_inline_decode(xdr, 4);
3355 if (unlikely(!p))
3356 goto out_overflow;
3357 *res = be32_to_cpup(p);
3358 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3359 }
3360 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3361 return 0;
3362 out_overflow:
3363 print_overflow_msg(__func__, xdr);
3364 return -EIO;
3365 }
3366
3367 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3368 {
3369 __be32 *p;
3370
3371 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3372 return -EIO;
3373 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3374 p = xdr_inline_decode(xdr, 4);
3375 if (unlikely(!p))
3376 goto out_overflow;
3377 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3378 *res = -be32_to_cpup(p);
3379 }
3380 return 0;
3381 out_overflow:
3382 print_overflow_msg(__func__, xdr);
3383 return -EIO;
3384 }
3385
3386 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3387 uint32_t *bitmap, uint32_t *bitmask)
3388 {
3389 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3390 int ret;
3391 ret = decode_attr_bitmap(xdr, bitmask);
3392 if (unlikely(ret < 0))
3393 return ret;
3394 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3395 } else
3396 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3397 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3398 bitmask[0], bitmask[1], bitmask[2]);
3399 return 0;
3400 }
3401
3402 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3403 {
3404 __be32 *p;
3405 int len;
3406
3407 if (fh != NULL)
3408 memset(fh, 0, sizeof(*fh));
3409
3410 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3411 return -EIO;
3412 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3413 p = xdr_inline_decode(xdr, 4);
3414 if (unlikely(!p))
3415 goto out_overflow;
3416 len = be32_to_cpup(p);
3417 if (len > NFS4_FHSIZE)
3418 return -EIO;
3419 p = xdr_inline_decode(xdr, len);
3420 if (unlikely(!p))
3421 goto out_overflow;
3422 if (fh != NULL) {
3423 memcpy(fh->data, p, len);
3424 fh->size = len;
3425 }
3426 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3427 }
3428 return 0;
3429 out_overflow:
3430 print_overflow_msg(__func__, xdr);
3431 return -EIO;
3432 }
3433
3434 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3435 {
3436 __be32 *p;
3437
3438 *res = 0;
3439 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3440 return -EIO;
3441 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3442 p = xdr_inline_decode(xdr, 4);
3443 if (unlikely(!p))
3444 goto out_overflow;
3445 *res = be32_to_cpup(p);
3446 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3447 }
3448 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3449 return 0;
3450 out_overflow:
3451 print_overflow_msg(__func__, xdr);
3452 return -EIO;
3453 }
3454
3455 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3456 {
3457 __be32 *p;
3458 int ret = 0;
3459
3460 *fileid = 0;
3461 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3462 return -EIO;
3463 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3464 p = xdr_inline_decode(xdr, 8);
3465 if (unlikely(!p))
3466 goto out_overflow;
3467 xdr_decode_hyper(p, fileid);
3468 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3469 ret = NFS_ATTR_FATTR_FILEID;
3470 }
3471 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3472 return ret;
3473 out_overflow:
3474 print_overflow_msg(__func__, xdr);
3475 return -EIO;
3476 }
3477
3478 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3479 {
3480 __be32 *p;
3481 int ret = 0;
3482
3483 *fileid = 0;
3484 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3485 return -EIO;
3486 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3487 p = xdr_inline_decode(xdr, 8);
3488 if (unlikely(!p))
3489 goto out_overflow;
3490 xdr_decode_hyper(p, fileid);
3491 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3492 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3493 }
3494 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3495 return ret;
3496 out_overflow:
3497 print_overflow_msg(__func__, xdr);
3498 return -EIO;
3499 }
3500
3501 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503 __be32 *p;
3504 int status = 0;
3505
3506 *res = 0;
3507 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3508 return -EIO;
3509 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3510 p = xdr_inline_decode(xdr, 8);
3511 if (unlikely(!p))
3512 goto out_overflow;
3513 xdr_decode_hyper(p, res);
3514 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3515 }
3516 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3517 return status;
3518 out_overflow:
3519 print_overflow_msg(__func__, xdr);
3520 return -EIO;
3521 }
3522
3523 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525 __be32 *p;
3526 int status = 0;
3527
3528 *res = 0;
3529 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3530 return -EIO;
3531 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3532 p = xdr_inline_decode(xdr, 8);
3533 if (unlikely(!p))
3534 goto out_overflow;
3535 xdr_decode_hyper(p, res);
3536 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3537 }
3538 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3539 return status;
3540 out_overflow:
3541 print_overflow_msg(__func__, xdr);
3542 return -EIO;
3543 }
3544
3545 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3546 {
3547 __be32 *p;
3548 int status = 0;
3549
3550 *res = 0;
3551 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3552 return -EIO;
3553 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3554 p = xdr_inline_decode(xdr, 8);
3555 if (unlikely(!p))
3556 goto out_overflow;
3557 xdr_decode_hyper(p, res);
3558 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3559 }
3560 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3561 return status;
3562 out_overflow:
3563 print_overflow_msg(__func__, xdr);
3564 return -EIO;
3565 }
3566
3567 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3568 {
3569 u32 n;
3570 __be32 *p;
3571 int status = 0;
3572
3573 p = xdr_inline_decode(xdr, 4);
3574 if (unlikely(!p))
3575 goto out_overflow;
3576 n = be32_to_cpup(p);
3577 if (n == 0)
3578 goto root_path;
3579 dprintk("pathname4: ");
3580 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3581 dprintk("cannot parse %d components in path\n", n);
3582 goto out_eio;
3583 }
3584 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3585 struct nfs4_string *component = &path->components[path->ncomponents];
3586 status = decode_opaque_inline(xdr, &component->len, &component->data);
3587 if (unlikely(status != 0))
3588 goto out_eio;
3589 ifdebug (XDR)
3590 pr_cont("%s%.*s ",
3591 (path->ncomponents != n ? "/ " : ""),
3592 component->len, component->data);
3593 }
3594 out:
3595 return status;
3596 root_path:
3597 /* a root pathname is sent as a zero component4 */
3598 path->ncomponents = 1;
3599 path->components[0].len=0;
3600 path->components[0].data=NULL;
3601 dprintk("pathname4: /\n");
3602 goto out;
3603 out_eio:
3604 dprintk(" status %d", status);
3605 status = -EIO;
3606 goto out;
3607 out_overflow:
3608 print_overflow_msg(__func__, xdr);
3609 return -EIO;
3610 }
3611
3612 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3613 {
3614 int n;
3615 __be32 *p;
3616 int status = -EIO;
3617
3618 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3619 goto out;
3620 status = 0;
3621 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3622 goto out;
3623 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3624 status = -EIO;
3625 /* Ignore borken servers that return unrequested attrs */
3626 if (unlikely(res == NULL))
3627 goto out;
3628 dprintk("%s: fsroot:\n", __func__);
3629 status = decode_pathname(xdr, &res->fs_path);
3630 if (unlikely(status != 0))
3631 goto out;
3632 p = xdr_inline_decode(xdr, 4);
3633 if (unlikely(!p))
3634 goto out_overflow;
3635 n = be32_to_cpup(p);
3636 if (n <= 0)
3637 goto out_eio;
3638 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3639 u32 m;
3640 struct nfs4_fs_location *loc;
3641
3642 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3643 break;
3644 loc = &res->locations[res->nlocations];
3645 p = xdr_inline_decode(xdr, 4);
3646 if (unlikely(!p))
3647 goto out_overflow;
3648 m = be32_to_cpup(p);
3649
3650 dprintk("%s: servers:\n", __func__);
3651 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3652 struct nfs4_string *server;
3653
3654 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3655 unsigned int i;
3656 dprintk("%s: using first %u of %u servers "
3657 "returned for location %u\n",
3658 __func__,
3659 NFS4_FS_LOCATION_MAXSERVERS,
3660 m, res->nlocations);
3661 for (i = loc->nservers; i < m; i++) {
3662 unsigned int len;
3663 char *data;
3664 status = decode_opaque_inline(xdr, &len, &data);
3665 if (unlikely(status != 0))
3666 goto out_eio;
3667 }
3668 break;
3669 }
3670 server = &loc->servers[loc->nservers];
3671 status = decode_opaque_inline(xdr, &server->len, &server->data);
3672 if (unlikely(status != 0))
3673 goto out_eio;
3674 dprintk("%s ", server->data);
3675 }
3676 status = decode_pathname(xdr, &loc->rootpath);
3677 if (unlikely(status != 0))
3678 goto out_eio;
3679 }
3680 if (res->nlocations != 0)
3681 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3682 out:
3683 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3684 return status;
3685 out_overflow:
3686 print_overflow_msg(__func__, xdr);
3687 out_eio:
3688 status = -EIO;
3689 goto out;
3690 }
3691
3692 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3693 {
3694 __be32 *p;
3695 int status = 0;
3696
3697 *res = 0;
3698 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3699 return -EIO;
3700 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3701 p = xdr_inline_decode(xdr, 8);
3702 if (unlikely(!p))
3703 goto out_overflow;
3704 xdr_decode_hyper(p, res);
3705 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3706 }
3707 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3708 return status;
3709 out_overflow:
3710 print_overflow_msg(__func__, xdr);
3711 return -EIO;
3712 }
3713
3714 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3715 {
3716 __be32 *p;
3717 int status = 0;
3718
3719 *maxlink = 1;
3720 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3721 return -EIO;
3722 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3723 p = xdr_inline_decode(xdr, 4);
3724 if (unlikely(!p))
3725 goto out_overflow;
3726 *maxlink = be32_to_cpup(p);
3727 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3728 }
3729 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3730 return status;
3731 out_overflow:
3732 print_overflow_msg(__func__, xdr);
3733 return -EIO;
3734 }
3735
3736 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3737 {
3738 __be32 *p;
3739 int status = 0;
3740
3741 *maxname = 1024;
3742 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3743 return -EIO;
3744 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3745 p = xdr_inline_decode(xdr, 4);
3746 if (unlikely(!p))
3747 goto out_overflow;
3748 *maxname = be32_to_cpup(p);
3749 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3750 }
3751 dprintk("%s: maxname=%u\n", __func__, *maxname);
3752 return status;
3753 out_overflow:
3754 print_overflow_msg(__func__, xdr);
3755 return -EIO;
3756 }
3757
3758 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3759 {
3760 __be32 *p;
3761 int status = 0;
3762
3763 *res = 1024;
3764 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3765 return -EIO;
3766 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3767 uint64_t maxread;
3768 p = xdr_inline_decode(xdr, 8);
3769 if (unlikely(!p))
3770 goto out_overflow;
3771 xdr_decode_hyper(p, &maxread);
3772 if (maxread > 0x7FFFFFFF)
3773 maxread = 0x7FFFFFFF;
3774 *res = (uint32_t)maxread;
3775 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3776 }
3777 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3778 return status;
3779 out_overflow:
3780 print_overflow_msg(__func__, xdr);
3781 return -EIO;
3782 }
3783
3784 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3785 {
3786 __be32 *p;
3787 int status = 0;
3788
3789 *res = 1024;
3790 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3791 return -EIO;
3792 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3793 uint64_t maxwrite;
3794 p = xdr_inline_decode(xdr, 8);
3795 if (unlikely(!p))
3796 goto out_overflow;
3797 xdr_decode_hyper(p, &maxwrite);
3798 if (maxwrite > 0x7FFFFFFF)
3799 maxwrite = 0x7FFFFFFF;
3800 *res = (uint32_t)maxwrite;
3801 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3802 }
3803 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3804 return status;
3805 out_overflow:
3806 print_overflow_msg(__func__, xdr);
3807 return -EIO;
3808 }
3809
3810 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3811 {
3812 uint32_t tmp;
3813 __be32 *p;
3814 int ret = 0;
3815
3816 *mode = 0;
3817 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3818 return -EIO;
3819 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3820 p = xdr_inline_decode(xdr, 4);
3821 if (unlikely(!p))
3822 goto out_overflow;
3823 tmp = be32_to_cpup(p);
3824 *mode = tmp & ~S_IFMT;
3825 bitmap[1] &= ~FATTR4_WORD1_MODE;
3826 ret = NFS_ATTR_FATTR_MODE;
3827 }
3828 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3829 return ret;
3830 out_overflow:
3831 print_overflow_msg(__func__, xdr);
3832 return -EIO;
3833 }
3834
3835 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3836 {
3837 __be32 *p;
3838 int ret = 0;
3839
3840 *nlink = 1;
3841 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3842 return -EIO;
3843 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3844 p = xdr_inline_decode(xdr, 4);
3845 if (unlikely(!p))
3846 goto out_overflow;
3847 *nlink = be32_to_cpup(p);
3848 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3849 ret = NFS_ATTR_FATTR_NLINK;
3850 }
3851 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3852 return ret;
3853 out_overflow:
3854 print_overflow_msg(__func__, xdr);
3855 return -EIO;
3856 }
3857
3858 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3859 const struct nfs_server *server, kuid_t *uid,
3860 struct nfs4_string *owner_name)
3861 {
3862 uint32_t len;
3863 __be32 *p;
3864 int ret = 0;
3865
3866 *uid = make_kuid(&init_user_ns, -2);
3867 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3868 return -EIO;
3869 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3870 p = xdr_inline_decode(xdr, 4);
3871 if (unlikely(!p))
3872 goto out_overflow;
3873 len = be32_to_cpup(p);
3874 p = xdr_inline_decode(xdr, len);
3875 if (unlikely(!p))
3876 goto out_overflow;
3877 if (owner_name != NULL) {
3878 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3879 if (owner_name->data != NULL) {
3880 owner_name->len = len;
3881 ret = NFS_ATTR_FATTR_OWNER_NAME;
3882 }
3883 } else if (len < XDR_MAX_NETOBJ) {
3884 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3885 ret = NFS_ATTR_FATTR_OWNER;
3886 else
3887 dprintk("%s: nfs_map_name_to_uid failed!\n",
3888 __func__);
3889 } else
3890 dprintk("%s: name too long (%u)!\n",
3891 __func__, len);
3892 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3893 }
3894 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3895 return ret;
3896 out_overflow:
3897 print_overflow_msg(__func__, xdr);
3898 return -EIO;
3899 }
3900
3901 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3902 const struct nfs_server *server, kgid_t *gid,
3903 struct nfs4_string *group_name)
3904 {
3905 uint32_t len;
3906 __be32 *p;
3907 int ret = 0;
3908
3909 *gid = make_kgid(&init_user_ns, -2);
3910 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3911 return -EIO;
3912 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3913 p = xdr_inline_decode(xdr, 4);
3914 if (unlikely(!p))
3915 goto out_overflow;
3916 len = be32_to_cpup(p);
3917 p = xdr_inline_decode(xdr, len);
3918 if (unlikely(!p))
3919 goto out_overflow;
3920 if (group_name != NULL) {
3921 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3922 if (group_name->data != NULL) {
3923 group_name->len = len;
3924 ret = NFS_ATTR_FATTR_GROUP_NAME;
3925 }
3926 } else if (len < XDR_MAX_NETOBJ) {
3927 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3928 ret = NFS_ATTR_FATTR_GROUP;
3929 else
3930 dprintk("%s: nfs_map_group_to_gid failed!\n",
3931 __func__);
3932 } else
3933 dprintk("%s: name too long (%u)!\n",
3934 __func__, len);
3935 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3936 }
3937 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3938 return ret;
3939 out_overflow:
3940 print_overflow_msg(__func__, xdr);
3941 return -EIO;
3942 }
3943
3944 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3945 {
3946 uint32_t major = 0, minor = 0;
3947 __be32 *p;
3948 int ret = 0;
3949
3950 *rdev = MKDEV(0,0);
3951 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3952 return -EIO;
3953 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3954 dev_t tmp;
3955
3956 p = xdr_inline_decode(xdr, 8);
3957 if (unlikely(!p))
3958 goto out_overflow;
3959 major = be32_to_cpup(p++);
3960 minor = be32_to_cpup(p);
3961 tmp = MKDEV(major, minor);
3962 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3963 *rdev = tmp;
3964 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3965 ret = NFS_ATTR_FATTR_RDEV;
3966 }
3967 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3968 return ret;
3969 out_overflow:
3970 print_overflow_msg(__func__, xdr);
3971 return -EIO;
3972 }
3973
3974 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3975 {
3976 __be32 *p;
3977 int status = 0;
3978
3979 *res = 0;
3980 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3981 return -EIO;
3982 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3983 p = xdr_inline_decode(xdr, 8);
3984 if (unlikely(!p))
3985 goto out_overflow;
3986 xdr_decode_hyper(p, res);
3987 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3988 }
3989 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3990 return status;
3991 out_overflow:
3992 print_overflow_msg(__func__, xdr);
3993 return -EIO;
3994 }
3995
3996 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3997 {
3998 __be32 *p;
3999 int status = 0;
4000
4001 *res = 0;
4002 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4003 return -EIO;
4004 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4005 p = xdr_inline_decode(xdr, 8);
4006 if (unlikely(!p))
4007 goto out_overflow;
4008 xdr_decode_hyper(p, res);
4009 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4010 }
4011 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4012 return status;
4013 out_overflow:
4014 print_overflow_msg(__func__, xdr);
4015 return -EIO;
4016 }
4017
4018 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4019 {
4020 __be32 *p;
4021 int status = 0;
4022
4023 *res = 0;
4024 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4025 return -EIO;
4026 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4027 p = xdr_inline_decode(xdr, 8);
4028 if (unlikely(!p))
4029 goto out_overflow;
4030 xdr_decode_hyper(p, res);
4031 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4032 }
4033 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4034 return status;
4035 out_overflow:
4036 print_overflow_msg(__func__, xdr);
4037 return -EIO;
4038 }
4039
4040 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4041 {
4042 __be32 *p;
4043 int ret = 0;
4044
4045 *used = 0;
4046 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4047 return -EIO;
4048 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4049 p = xdr_inline_decode(xdr, 8);
4050 if (unlikely(!p))
4051 goto out_overflow;
4052 xdr_decode_hyper(p, used);
4053 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4054 ret = NFS_ATTR_FATTR_SPACE_USED;
4055 }
4056 dprintk("%s: space used=%Lu\n", __func__,
4057 (unsigned long long)*used);
4058 return ret;
4059 out_overflow:
4060 print_overflow_msg(__func__, xdr);
4061 return -EIO;
4062 }
4063
4064 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4065 {
4066 __be32 *p;
4067 uint64_t sec;
4068 uint32_t nsec;
4069
4070 p = xdr_inline_decode(xdr, 12);
4071 if (unlikely(!p))
4072 goto out_overflow;
4073 p = xdr_decode_hyper(p, &sec);
4074 nsec = be32_to_cpup(p);
4075 time->tv_sec = (time_t)sec;
4076 time->tv_nsec = (long)nsec;
4077 return 0;
4078 out_overflow:
4079 print_overflow_msg(__func__, xdr);
4080 return -EIO;
4081 }
4082
4083 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4084 {
4085 int status = 0;
4086
4087 time->tv_sec = 0;
4088 time->tv_nsec = 0;
4089 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4090 return -EIO;
4091 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4092 status = decode_attr_time(xdr, time);
4093 if (status == 0)
4094 status = NFS_ATTR_FATTR_ATIME;
4095 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4096 }
4097 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4098 return status;
4099 }
4100
4101 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4102 {
4103 int status = 0;
4104
4105 time->tv_sec = 0;
4106 time->tv_nsec = 0;
4107 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4108 return -EIO;
4109 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4110 status = decode_attr_time(xdr, time);
4111 if (status == 0)
4112 status = NFS_ATTR_FATTR_CTIME;
4113 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4114 }
4115 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4116 return status;
4117 }
4118
4119 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4120 struct timespec *time)
4121 {
4122 int status = 0;
4123
4124 time->tv_sec = 0;
4125 time->tv_nsec = 0;
4126 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4127 return -EIO;
4128 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4129 status = decode_attr_time(xdr, time);
4130 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4131 }
4132 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4133 (long)time->tv_nsec);
4134 return status;
4135 }
4136
4137 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4138 struct nfs4_label *label)
4139 {
4140 uint32_t pi = 0;
4141 uint32_t lfs = 0;
4142 __u32 len;
4143 __be32 *p;
4144 int status = 0;
4145
4146 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4147 return -EIO;
4148 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4149 p = xdr_inline_decode(xdr, 4);
4150 if (unlikely(!p))
4151 goto out_overflow;
4152 lfs = be32_to_cpup(p++);
4153 p = xdr_inline_decode(xdr, 4);
4154 if (unlikely(!p))
4155 goto out_overflow;
4156 pi = be32_to_cpup(p++);
4157 p = xdr_inline_decode(xdr, 4);
4158 if (unlikely(!p))
4159 goto out_overflow;
4160 len = be32_to_cpup(p++);
4161 p = xdr_inline_decode(xdr, len);
4162 if (unlikely(!p))
4163 goto out_overflow;
4164 if (len < NFS4_MAXLABELLEN) {
4165 if (label) {
4166 memcpy(label->label, p, len);
4167 label->len = len;
4168 label->pi = pi;
4169 label->lfs = lfs;
4170 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4171 }
4172 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4173 } else
4174 printk(KERN_WARNING "%s: label too long (%u)!\n",
4175 __func__, len);
4176 }
4177 if (label && label->label)
4178 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4179 (char *)label->label, label->len, label->pi, label->lfs);
4180 return status;
4181
4182 out_overflow:
4183 print_overflow_msg(__func__, xdr);
4184 return -EIO;
4185 }
4186
4187 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4188 {
4189 int status = 0;
4190
4191 time->tv_sec = 0;
4192 time->tv_nsec = 0;
4193 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4194 return -EIO;
4195 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4196 status = decode_attr_time(xdr, time);
4197 if (status == 0)
4198 status = NFS_ATTR_FATTR_MTIME;
4199 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4200 }
4201 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4202 return status;
4203 }
4204
4205 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4206 {
4207 unsigned int attrwords = XDR_QUADLEN(attrlen);
4208 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4209
4210 if (unlikely(attrwords != nwords)) {
4211 dprintk("%s: server returned incorrect attribute length: "
4212 "%u %c %u\n",
4213 __func__,
4214 attrwords << 2,
4215 (attrwords < nwords) ? '<' : '>',
4216 nwords << 2);
4217 return -EIO;
4218 }
4219 return 0;
4220 }
4221
4222 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4223 {
4224 __be32 *p;
4225
4226 p = xdr_inline_decode(xdr, 20);
4227 if (unlikely(!p))
4228 goto out_overflow;
4229 cinfo->atomic = be32_to_cpup(p++);
4230 p = xdr_decode_hyper(p, &cinfo->before);
4231 xdr_decode_hyper(p, &cinfo->after);
4232 return 0;
4233 out_overflow:
4234 print_overflow_msg(__func__, xdr);
4235 return -EIO;
4236 }
4237
4238 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4239 {
4240 __be32 *p;
4241 uint32_t supp, acc;
4242 int status;
4243
4244 status = decode_op_hdr(xdr, OP_ACCESS);
4245 if (status)
4246 return status;
4247 p = xdr_inline_decode(xdr, 8);
4248 if (unlikely(!p))
4249 goto out_overflow;
4250 supp = be32_to_cpup(p++);
4251 acc = be32_to_cpup(p);
4252 *supported = supp;
4253 *access = acc;
4254 return 0;
4255 out_overflow:
4256 print_overflow_msg(__func__, xdr);
4257 return -EIO;
4258 }
4259
4260 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4261 {
4262 __be32 *p;
4263
4264 p = xdr_inline_decode(xdr, len);
4265 if (likely(p)) {
4266 memcpy(buf, p, len);
4267 return 0;
4268 }
4269 print_overflow_msg(__func__, xdr);
4270 return -EIO;
4271 }
4272
4273 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4274 {
4275 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4276 }
4277
4278 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280 stateid->type = NFS4_OPEN_STATEID_TYPE;
4281 return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286 stateid->type = NFS4_LOCK_STATEID_TYPE;
4287 return decode_stateid(xdr, stateid);
4288 }
4289
4290 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291 {
4292 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4293 return decode_stateid(xdr, stateid);
4294 }
4295
4296 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4297 {
4298 int status;
4299
4300 status = decode_op_hdr(xdr, OP_CLOSE);
4301 if (status != -EIO)
4302 nfs_increment_open_seqid(status, res->seqid);
4303 if (!status)
4304 status = decode_open_stateid(xdr, &res->stateid);
4305 return status;
4306 }
4307
4308 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4309 {
4310 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4314 {
4315 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4316 }
4317
4318 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4319 {
4320 int status;
4321
4322 status = decode_op_hdr(xdr, OP_COMMIT);
4323 if (!status)
4324 status = decode_write_verifier(xdr, &res->verf->verifier);
4325 return status;
4326 }
4327
4328 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4329 {
4330 __be32 *p;
4331 uint32_t bmlen;
4332 int status;
4333
4334 status = decode_op_hdr(xdr, OP_CREATE);
4335 if (status)
4336 return status;
4337 if ((status = decode_change_info(xdr, cinfo)))
4338 return status;
4339 p = xdr_inline_decode(xdr, 4);
4340 if (unlikely(!p))
4341 goto out_overflow;
4342 bmlen = be32_to_cpup(p);
4343 p = xdr_inline_decode(xdr, bmlen << 2);
4344 if (likely(p))
4345 return 0;
4346 out_overflow:
4347 print_overflow_msg(__func__, xdr);
4348 return -EIO;
4349 }
4350
4351 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4352 {
4353 unsigned int savep;
4354 uint32_t attrlen, bitmap[3] = {0};
4355 int status;
4356
4357 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4360 goto xdr_error;
4361 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4362 goto xdr_error;
4363 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4366 &res->fh_expire_type)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4369 goto xdr_error;
4370 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4371 goto xdr_error;
4372 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4373 goto xdr_error;
4374 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4375 res->exclcreat_bitmask)) != 0)
4376 goto xdr_error;
4377 status = verify_attr_len(xdr, savep, attrlen);
4378 xdr_error:
4379 dprintk("%s: xdr returned %d!\n", __func__, -status);
4380 return status;
4381 }
4382
4383 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4384 {
4385 unsigned int savep;
4386 uint32_t attrlen, bitmap[3] = {0};
4387 int status;
4388
4389 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4394 goto xdr_error;
4395
4396 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4397 goto xdr_error;
4398 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4399 goto xdr_error;
4400 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4401 goto xdr_error;
4402
4403 status = -EIO;
4404 if (unlikely(bitmap[0]))
4405 goto xdr_error;
4406
4407 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4408 goto xdr_error;
4409 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4410 goto xdr_error;
4411 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4412 goto xdr_error;
4413
4414 status = verify_attr_len(xdr, savep, attrlen);
4415 xdr_error:
4416 dprintk("%s: xdr returned %d!\n", __func__, -status);
4417 return status;
4418 }
4419
4420 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4421 {
4422 unsigned int savep;
4423 uint32_t attrlen, bitmap[3] = {0};
4424 int status;
4425
4426 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4427 goto xdr_error;
4428 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4429 goto xdr_error;
4430 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4431 goto xdr_error;
4432
4433 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4434 goto xdr_error;
4435 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4436 goto xdr_error;
4437
4438 status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440 dprintk("%s: xdr returned %d!\n", __func__, -status);
4441 return status;
4442 }
4443
4444 static int decode_threshold_hint(struct xdr_stream *xdr,
4445 uint32_t *bitmap,
4446 uint64_t *res,
4447 uint32_t hint_bit)
4448 {
4449 __be32 *p;
4450
4451 *res = 0;
4452 if (likely(bitmap[0] & hint_bit)) {
4453 p = xdr_inline_decode(xdr, 8);
4454 if (unlikely(!p))
4455 goto out_overflow;
4456 xdr_decode_hyper(p, res);
4457 }
4458 return 0;
4459 out_overflow:
4460 print_overflow_msg(__func__, xdr);
4461 return -EIO;
4462 }
4463
4464 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4465 struct nfs4_threshold *res)
4466 {
4467 __be32 *p;
4468 unsigned int savep;
4469 uint32_t bitmap[3] = {0,}, attrlen;
4470 int status;
4471
4472 /* layout type */
4473 p = xdr_inline_decode(xdr, 4);
4474 if (unlikely(!p)) {
4475 print_overflow_msg(__func__, xdr);
4476 return -EIO;
4477 }
4478 res->l_type = be32_to_cpup(p);
4479
4480 /* thi_hintset bitmap */
4481 status = decode_attr_bitmap(xdr, bitmap);
4482 if (status < 0)
4483 goto xdr_error;
4484
4485 /* thi_hintlist length */
4486 status = decode_attr_length(xdr, &attrlen, &savep);
4487 if (status < 0)
4488 goto xdr_error;
4489 /* thi_hintlist */
4490 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4491 if (status < 0)
4492 goto xdr_error;
4493 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4494 if (status < 0)
4495 goto xdr_error;
4496 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4497 THRESHOLD_RD_IO);
4498 if (status < 0)
4499 goto xdr_error;
4500 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4501 THRESHOLD_WR_IO);
4502 if (status < 0)
4503 goto xdr_error;
4504
4505 status = verify_attr_len(xdr, savep, attrlen);
4506 res->bm = bitmap[0];
4507
4508 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4509 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4510 res->wr_io_sz);
4511 xdr_error:
4512 dprintk("%s ret=%d!\n", __func__, status);
4513 return status;
4514 }
4515
4516 /*
4517 * Thresholds on pNFS direct I/O vrs MDS I/O
4518 */
4519 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4520 uint32_t *bitmap,
4521 struct nfs4_threshold *res)
4522 {
4523 __be32 *p;
4524 int status = 0;
4525 uint32_t num;
4526
4527 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4528 return -EIO;
4529 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4530 /* Did the server return an unrequested attribute? */
4531 if (unlikely(res == NULL))
4532 return -EREMOTEIO;
4533 p = xdr_inline_decode(xdr, 4);
4534 if (unlikely(!p))
4535 goto out_overflow;
4536 num = be32_to_cpup(p);
4537 if (num == 0)
4538 return 0;
4539 if (num > 1)
4540 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4541 "drivers per filesystem not supported\n",
4542 __func__);
4543
4544 status = decode_first_threshold_item4(xdr, res);
4545 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4546 }
4547 return status;
4548 out_overflow:
4549 print_overflow_msg(__func__, xdr);
4550 return -EIO;
4551 }
4552
4553 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4554 struct nfs_fattr *fattr, struct nfs_fh *fh,
4555 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4556 const struct nfs_server *server)
4557 {
4558 int status;
4559 umode_t fmode = 0;
4560 uint32_t type;
4561 int32_t err;
4562
4563 status = decode_attr_type(xdr, bitmap, &type);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->mode = 0;
4567 if (status != 0) {
4568 fattr->mode |= nfs_type2fmt[type];
4569 fattr->valid |= status;
4570 }
4571
4572 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4573 if (status < 0)
4574 goto xdr_error;
4575 fattr->valid |= status;
4576
4577 status = decode_attr_size(xdr, bitmap, &fattr->size);
4578 if (status < 0)
4579 goto xdr_error;
4580 fattr->valid |= status;
4581
4582 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4583 if (status < 0)
4584 goto xdr_error;
4585 fattr->valid |= status;
4586
4587 err = 0;
4588 status = decode_attr_error(xdr, bitmap, &err);
4589 if (status < 0)
4590 goto xdr_error;
4591
4592 status = decode_attr_filehandle(xdr, bitmap, fh);
4593 if (status < 0)
4594 goto xdr_error;
4595
4596 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4597 if (status < 0)
4598 goto xdr_error;
4599 fattr->valid |= status;
4600
4601 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4602 if (status < 0)
4603 goto xdr_error;
4604 fattr->valid |= status;
4605
4606 status = -EIO;
4607 if (unlikely(bitmap[0]))
4608 goto xdr_error;
4609
4610 status = decode_attr_mode(xdr, bitmap, &fmode);
4611 if (status < 0)
4612 goto xdr_error;
4613 if (status != 0) {
4614 fattr->mode |= fmode;
4615 fattr->valid |= status;
4616 }
4617
4618 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4619 if (status < 0)
4620 goto xdr_error;
4621 fattr->valid |= status;
4622
4623 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4624 if (status < 0)
4625 goto xdr_error;
4626 fattr->valid |= status;
4627
4628 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4629 if (status < 0)
4630 goto xdr_error;
4631 fattr->valid |= status;
4632
4633 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4634 if (status < 0)
4635 goto xdr_error;
4636 fattr->valid |= status;
4637
4638 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4639 if (status < 0)
4640 goto xdr_error;
4641 fattr->valid |= status;
4642
4643 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4644 if (status < 0)
4645 goto xdr_error;
4646 fattr->valid |= status;
4647
4648 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4649 if (status < 0)
4650 goto xdr_error;
4651 fattr->valid |= status;
4652
4653 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4654 if (status < 0)
4655 goto xdr_error;
4656 fattr->valid |= status;
4657
4658 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4659 if (status < 0)
4660 goto xdr_error;
4661 fattr->valid |= status;
4662
4663 status = -EIO;
4664 if (unlikely(bitmap[1]))
4665 goto xdr_error;
4666
4667 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4668 if (status < 0)
4669 goto xdr_error;
4670
4671 if (label) {
4672 status = decode_attr_security_label(xdr, bitmap, label);
4673 if (status < 0)
4674 goto xdr_error;
4675 fattr->valid |= status;
4676 }
4677
4678 xdr_error:
4679 dprintk("%s: xdr returned %d\n", __func__, -status);
4680 return status;
4681 }
4682
4683 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4684 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4685 struct nfs4_label *label, const struct nfs_server *server)
4686 {
4687 unsigned int savep;
4688 uint32_t attrlen,
4689 bitmap[3] = {0};
4690 int status;
4691
4692 status = decode_op_hdr(xdr, OP_GETATTR);
4693 if (status < 0)
4694 goto xdr_error;
4695
4696 status = decode_attr_bitmap(xdr, bitmap);
4697 if (status < 0)
4698 goto xdr_error;
4699
4700 status = decode_attr_length(xdr, &attrlen, &savep);
4701 if (status < 0)
4702 goto xdr_error;
4703
4704 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4705 label, server);
4706 if (status < 0)
4707 goto xdr_error;
4708
4709 status = verify_attr_len(xdr, savep, attrlen);
4710 xdr_error:
4711 dprintk("%s: xdr returned %d\n", __func__, -status);
4712 return status;
4713 }
4714
4715 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4716 struct nfs4_label *label, const struct nfs_server *server)
4717 {
4718 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4719 }
4720
4721 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4722 const struct nfs_server *server)
4723 {
4724 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4725 }
4726
4727 /*
4728 * Decode potentially multiple layout types. Currently we only support
4729 * one layout driver per file system.
4730 */
4731 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4732 uint32_t *layouttype)
4733 {
4734 __be32 *p;
4735 int num;
4736
4737 p = xdr_inline_decode(xdr, 4);
4738 if (unlikely(!p))
4739 goto out_overflow;
4740 num = be32_to_cpup(p);
4741
4742 /* pNFS is not supported by the underlying file system */
4743 if (num == 0) {
4744 *layouttype = 0;
4745 return 0;
4746 }
4747 if (num > 1)
4748 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4749 "drivers per filesystem not supported\n", __func__);
4750
4751 /* Decode and set first layout type, move xdr->p past unused types */
4752 p = xdr_inline_decode(xdr, num * 4);
4753 if (unlikely(!p))
4754 goto out_overflow;
4755 *layouttype = be32_to_cpup(p);
4756 return 0;
4757 out_overflow:
4758 print_overflow_msg(__func__, xdr);
4759 return -EIO;
4760 }
4761
4762 /*
4763 * The type of file system exported.
4764 * Note we must ensure that layouttype is set in any non-error case.
4765 */
4766 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4767 uint32_t *layouttype)
4768 {
4769 int status = 0;
4770
4771 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4772 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4773 return -EIO;
4774 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4775 status = decode_first_pnfs_layout_type(xdr, layouttype);
4776 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4777 } else
4778 *layouttype = 0;
4779 return status;
4780 }
4781
4782 /*
4783 * The prefered block size for layout directed io
4784 */
4785 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4786 uint32_t *res)
4787 {
4788 __be32 *p;
4789
4790 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4791 *res = 0;
4792 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4793 p = xdr_inline_decode(xdr, 4);
4794 if (unlikely(!p)) {
4795 print_overflow_msg(__func__, xdr);
4796 return -EIO;
4797 }
4798 *res = be32_to_cpup(p);
4799 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4800 }
4801 return 0;
4802 }
4803
4804 /*
4805 * The granularity of a CLONE operation.
4806 */
4807 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4808 uint32_t *res)
4809 {
4810 __be32 *p;
4811
4812 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4813 *res = 0;
4814 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4815 p = xdr_inline_decode(xdr, 4);
4816 if (unlikely(!p)) {
4817 print_overflow_msg(__func__, xdr);
4818 return -EIO;
4819 }
4820 *res = be32_to_cpup(p);
4821 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4822 }
4823 return 0;
4824 }
4825
4826 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4827 {
4828 unsigned int savep;
4829 uint32_t attrlen, bitmap[3];
4830 int status;
4831
4832 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4833 goto xdr_error;
4834 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4835 goto xdr_error;
4836 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4837 goto xdr_error;
4838
4839 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4840
4841 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4842 goto xdr_error;
4843 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4844 goto xdr_error;
4845 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4846 goto xdr_error;
4847 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4848 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4849 goto xdr_error;
4850 fsinfo->wtpref = fsinfo->wtmax;
4851
4852 status = -EIO;
4853 if (unlikely(bitmap[0]))
4854 goto xdr_error;
4855
4856 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4857 if (status != 0)
4858 goto xdr_error;
4859 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4860 if (status != 0)
4861 goto xdr_error;
4862
4863 status = -EIO;
4864 if (unlikely(bitmap[1]))
4865 goto xdr_error;
4866
4867 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4868 if (status)
4869 goto xdr_error;
4870 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4871 if (status)
4872 goto xdr_error;
4873
4874 status = verify_attr_len(xdr, savep, attrlen);
4875 xdr_error:
4876 dprintk("%s: xdr returned %d!\n", __func__, -status);
4877 return status;
4878 }
4879
4880 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4881 {
4882 __be32 *p;
4883 uint32_t len;
4884 int status;
4885
4886 /* Zero handle first to allow comparisons */
4887 memset(fh, 0, sizeof(*fh));
4888
4889 status = decode_op_hdr(xdr, OP_GETFH);
4890 if (status)
4891 return status;
4892
4893 p = xdr_inline_decode(xdr, 4);
4894 if (unlikely(!p))
4895 goto out_overflow;
4896 len = be32_to_cpup(p);
4897 if (len > NFS4_FHSIZE)
4898 return -EIO;
4899 fh->size = len;
4900 p = xdr_inline_decode(xdr, len);
4901 if (unlikely(!p))
4902 goto out_overflow;
4903 memcpy(fh->data, p, len);
4904 return 0;
4905 out_overflow:
4906 print_overflow_msg(__func__, xdr);
4907 return -EIO;
4908 }
4909
4910 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4911 {
4912 int status;
4913
4914 status = decode_op_hdr(xdr, OP_LINK);
4915 if (status)
4916 return status;
4917 return decode_change_info(xdr, cinfo);
4918 }
4919
4920 /*
4921 * We create the owner, so we know a proper owner.id length is 4.
4922 */
4923 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4924 {
4925 uint64_t offset, length, clientid;
4926 __be32 *p;
4927 uint32_t namelen, type;
4928
4929 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4930 if (unlikely(!p))
4931 goto out_overflow;
4932 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4933 p = xdr_decode_hyper(p, &length);
4934 type = be32_to_cpup(p++); /* 4 byte read */
4935 if (fl != NULL) { /* manipulate file lock */
4936 fl->fl_start = (loff_t)offset;
4937 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4938 if (length == ~(uint64_t)0)
4939 fl->fl_end = OFFSET_MAX;
4940 fl->fl_type = F_WRLCK;
4941 if (type & 1)
4942 fl->fl_type = F_RDLCK;
4943 fl->fl_pid = 0;
4944 }
4945 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4946 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4947 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4948 if (likely(p))
4949 return -NFS4ERR_DENIED;
4950 out_overflow:
4951 print_overflow_msg(__func__, xdr);
4952 return -EIO;
4953 }
4954
4955 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4956 {
4957 int status;
4958
4959 status = decode_op_hdr(xdr, OP_LOCK);
4960 if (status == -EIO)
4961 goto out;
4962 if (status == 0) {
4963 status = decode_lock_stateid(xdr, &res->stateid);
4964 if (unlikely(status))
4965 goto out;
4966 } else if (status == -NFS4ERR_DENIED)
4967 status = decode_lock_denied(xdr, NULL);
4968 if (res->open_seqid != NULL)
4969 nfs_increment_open_seqid(status, res->open_seqid);
4970 nfs_increment_lock_seqid(status, res->lock_seqid);
4971 out:
4972 return status;
4973 }
4974
4975 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4976 {
4977 int status;
4978 status = decode_op_hdr(xdr, OP_LOCKT);
4979 if (status == -NFS4ERR_DENIED)
4980 return decode_lock_denied(xdr, res->denied);
4981 return status;
4982 }
4983
4984 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4985 {
4986 int status;
4987
4988 status = decode_op_hdr(xdr, OP_LOCKU);
4989 if (status != -EIO)
4990 nfs_increment_lock_seqid(status, res->seqid);
4991 if (status == 0)
4992 status = decode_lock_stateid(xdr, &res->stateid);
4993 return status;
4994 }
4995
4996 static int decode_release_lockowner(struct xdr_stream *xdr)
4997 {
4998 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4999 }
5000
5001 static int decode_lookup(struct xdr_stream *xdr)
5002 {
5003 return decode_op_hdr(xdr, OP_LOOKUP);
5004 }
5005
5006 /* This is too sick! */
5007 static int decode_space_limit(struct xdr_stream *xdr,
5008 unsigned long *pagemod_limit)
5009 {
5010 __be32 *p;
5011 uint32_t limit_type, nblocks, blocksize;
5012 u64 maxsize = 0;
5013
5014 p = xdr_inline_decode(xdr, 12);
5015 if (unlikely(!p))
5016 goto out_overflow;
5017 limit_type = be32_to_cpup(p++);
5018 switch (limit_type) {
5019 case NFS4_LIMIT_SIZE:
5020 xdr_decode_hyper(p, &maxsize);
5021 break;
5022 case NFS4_LIMIT_BLOCKS:
5023 nblocks = be32_to_cpup(p++);
5024 blocksize = be32_to_cpup(p);
5025 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5026 }
5027 maxsize >>= PAGE_SHIFT;
5028 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5029 return 0;
5030 out_overflow:
5031 print_overflow_msg(__func__, xdr);
5032 return -EIO;
5033 }
5034
5035 static int decode_rw_delegation(struct xdr_stream *xdr,
5036 uint32_t delegation_type,
5037 struct nfs_openres *res)
5038 {
5039 __be32 *p;
5040 int status;
5041
5042 status = decode_delegation_stateid(xdr, &res->delegation);
5043 if (unlikely(status))
5044 return status;
5045 p = xdr_inline_decode(xdr, 4);
5046 if (unlikely(!p))
5047 goto out_overflow;
5048 res->do_recall = be32_to_cpup(p);
5049
5050 switch (delegation_type) {
5051 case NFS4_OPEN_DELEGATE_READ:
5052 res->delegation_type = FMODE_READ;
5053 break;
5054 case NFS4_OPEN_DELEGATE_WRITE:
5055 res->delegation_type = FMODE_WRITE|FMODE_READ;
5056 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5057 return -EIO;
5058 }
5059 return decode_ace(xdr, NULL, res->server->nfs_client);
5060 out_overflow:
5061 print_overflow_msg(__func__, xdr);
5062 return -EIO;
5063 }
5064
5065 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5066 {
5067 __be32 *p;
5068 uint32_t why_no_delegation;
5069
5070 p = xdr_inline_decode(xdr, 4);
5071 if (unlikely(!p))
5072 goto out_overflow;
5073 why_no_delegation = be32_to_cpup(p);
5074 switch (why_no_delegation) {
5075 case WND4_CONTENTION:
5076 case WND4_RESOURCE:
5077 xdr_inline_decode(xdr, 4);
5078 /* Ignore for now */
5079 }
5080 return 0;
5081 out_overflow:
5082 print_overflow_msg(__func__, xdr);
5083 return -EIO;
5084 }
5085
5086 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5087 {
5088 __be32 *p;
5089 uint32_t delegation_type;
5090
5091 p = xdr_inline_decode(xdr, 4);
5092 if (unlikely(!p))
5093 goto out_overflow;
5094 delegation_type = be32_to_cpup(p);
5095 res->delegation_type = 0;
5096 switch (delegation_type) {
5097 case NFS4_OPEN_DELEGATE_NONE:
5098 return 0;
5099 case NFS4_OPEN_DELEGATE_READ:
5100 case NFS4_OPEN_DELEGATE_WRITE:
5101 return decode_rw_delegation(xdr, delegation_type, res);
5102 case NFS4_OPEN_DELEGATE_NONE_EXT:
5103 return decode_no_delegation(xdr, res);
5104 }
5105 return -EIO;
5106 out_overflow:
5107 print_overflow_msg(__func__, xdr);
5108 return -EIO;
5109 }
5110
5111 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5112 {
5113 __be32 *p;
5114 uint32_t savewords, bmlen, i;
5115 int status;
5116
5117 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5118 return status;
5119 nfs_increment_open_seqid(status, res->seqid);
5120 if (status)
5121 return status;
5122 status = decode_open_stateid(xdr, &res->stateid);
5123 if (unlikely(status))
5124 return status;
5125
5126 decode_change_info(xdr, &res->cinfo);
5127
5128 p = xdr_inline_decode(xdr, 8);
5129 if (unlikely(!p))
5130 goto out_overflow;
5131 res->rflags = be32_to_cpup(p++);
5132 bmlen = be32_to_cpup(p);
5133 if (bmlen > 10)
5134 goto xdr_error;
5135
5136 p = xdr_inline_decode(xdr, bmlen << 2);
5137 if (unlikely(!p))
5138 goto out_overflow;
5139 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5140 for (i = 0; i < savewords; ++i)
5141 res->attrset[i] = be32_to_cpup(p++);
5142 for (; i < NFS4_BITMAP_SIZE; i++)
5143 res->attrset[i] = 0;
5144
5145 return decode_delegation(xdr, res);
5146 xdr_error:
5147 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5148 return -EIO;
5149 out_overflow:
5150 print_overflow_msg(__func__, xdr);
5151 return -EIO;
5152 }
5153
5154 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5155 {
5156 int status;
5157
5158 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5159 if (status != -EIO)
5160 nfs_increment_open_seqid(status, res->seqid);
5161 if (!status)
5162 status = decode_open_stateid(xdr, &res->stateid);
5163 return status;
5164 }
5165
5166 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5167 {
5168 int status;
5169
5170 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5171 if (status != -EIO)
5172 nfs_increment_open_seqid(status, res->seqid);
5173 if (!status)
5174 status = decode_open_stateid(xdr, &res->stateid);
5175 return status;
5176 }
5177
5178 static int decode_putfh(struct xdr_stream *xdr)
5179 {
5180 return decode_op_hdr(xdr, OP_PUTFH);
5181 }
5182
5183 static int decode_putrootfh(struct xdr_stream *xdr)
5184 {
5185 return decode_op_hdr(xdr, OP_PUTROOTFH);
5186 }
5187
5188 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5189 struct nfs_pgio_res *res)
5190 {
5191 __be32 *p;
5192 uint32_t count, eof, recvd;
5193 int status;
5194
5195 status = decode_op_hdr(xdr, OP_READ);
5196 if (status)
5197 return status;
5198 p = xdr_inline_decode(xdr, 8);
5199 if (unlikely(!p))
5200 goto out_overflow;
5201 eof = be32_to_cpup(p++);
5202 count = be32_to_cpup(p);
5203 recvd = xdr_read_pages(xdr, count);
5204 if (count > recvd) {
5205 dprintk("NFS: server cheating in read reply: "
5206 "count %u > recvd %u\n", count, recvd);
5207 count = recvd;
5208 eof = 0;
5209 }
5210 res->eof = eof;
5211 res->count = count;
5212 return 0;
5213 out_overflow:
5214 print_overflow_msg(__func__, xdr);
5215 return -EIO;
5216 }
5217
5218 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5219 {
5220 int status;
5221 __be32 verf[2];
5222
5223 status = decode_op_hdr(xdr, OP_READDIR);
5224 if (!status)
5225 status = decode_verifier(xdr, readdir->verifier.data);
5226 if (unlikely(status))
5227 return status;
5228 memcpy(verf, readdir->verifier.data, sizeof(verf));
5229 dprintk("%s: verifier = %08x:%08x\n",
5230 __func__, verf[0], verf[1]);
5231 return xdr_read_pages(xdr, xdr->buf->page_len);
5232 }
5233
5234 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5235 {
5236 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5237 u32 len, recvd;
5238 __be32 *p;
5239 int status;
5240
5241 status = decode_op_hdr(xdr, OP_READLINK);
5242 if (status)
5243 return status;
5244
5245 /* Convert length of symlink */
5246 p = xdr_inline_decode(xdr, 4);
5247 if (unlikely(!p))
5248 goto out_overflow;
5249 len = be32_to_cpup(p);
5250 if (len >= rcvbuf->page_len || len <= 0) {
5251 dprintk("nfs: server returned giant symlink!\n");
5252 return -ENAMETOOLONG;
5253 }
5254 recvd = xdr_read_pages(xdr, len);
5255 if (recvd < len) {
5256 dprintk("NFS: server cheating in readlink reply: "
5257 "count %u > recvd %u\n", len, recvd);
5258 return -EIO;
5259 }
5260 /*
5261 * The XDR encode routine has set things up so that
5262 * the link text will be copied directly into the
5263 * buffer. We just have to do overflow-checking,
5264 * and and null-terminate the text (the VFS expects
5265 * null-termination).
5266 */
5267 xdr_terminate_string(rcvbuf, len);
5268 return 0;
5269 out_overflow:
5270 print_overflow_msg(__func__, xdr);
5271 return -EIO;
5272 }
5273
5274 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5275 {
5276 int status;
5277
5278 status = decode_op_hdr(xdr, OP_REMOVE);
5279 if (status)
5280 goto out;
5281 status = decode_change_info(xdr, cinfo);
5282 out:
5283 return status;
5284 }
5285
5286 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5287 struct nfs4_change_info *new_cinfo)
5288 {
5289 int status;
5290
5291 status = decode_op_hdr(xdr, OP_RENAME);
5292 if (status)
5293 goto out;
5294 if ((status = decode_change_info(xdr, old_cinfo)))
5295 goto out;
5296 status = decode_change_info(xdr, new_cinfo);
5297 out:
5298 return status;
5299 }
5300
5301 static int decode_renew(struct xdr_stream *xdr)
5302 {
5303 return decode_op_hdr(xdr, OP_RENEW);
5304 }
5305
5306 static int
5307 decode_restorefh(struct xdr_stream *xdr)
5308 {
5309 return decode_op_hdr(xdr, OP_RESTOREFH);
5310 }
5311
5312 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5313 struct nfs_getaclres *res)
5314 {
5315 unsigned int savep;
5316 uint32_t attrlen,
5317 bitmap[3] = {0};
5318 int status;
5319 unsigned int pg_offset;
5320
5321 res->acl_len = 0;
5322 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5323 goto out;
5324
5325 xdr_enter_page(xdr, xdr->buf->page_len);
5326
5327 /* Calculate the offset of the page data */
5328 pg_offset = xdr->buf->head[0].iov_len;
5329
5330 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5331 goto out;
5332 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5333 goto out;
5334
5335 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5336 return -EIO;
5337 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5338
5339 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5340 * are stored with the acl data to handle the problem of
5341 * variable length bitmaps.*/
5342 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5343 res->acl_len = attrlen;
5344
5345 /* Check for receive buffer overflow */
5346 if (res->acl_len > (xdr->nwords << 2) ||
5347 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5348 res->acl_flags |= NFS4_ACL_TRUNC;
5349 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5350 attrlen, xdr->nwords << 2);
5351 }
5352 } else
5353 status = -EOPNOTSUPP;
5354
5355 out:
5356 return status;
5357 }
5358
5359 static int
5360 decode_savefh(struct xdr_stream *xdr)
5361 {
5362 return decode_op_hdr(xdr, OP_SAVEFH);
5363 }
5364
5365 static int decode_setattr(struct xdr_stream *xdr)
5366 {
5367 __be32 *p;
5368 uint32_t bmlen;
5369 int status;
5370
5371 status = decode_op_hdr(xdr, OP_SETATTR);
5372 if (status)
5373 return status;
5374 p = xdr_inline_decode(xdr, 4);
5375 if (unlikely(!p))
5376 goto out_overflow;
5377 bmlen = be32_to_cpup(p);
5378 p = xdr_inline_decode(xdr, bmlen << 2);
5379 if (likely(p))
5380 return 0;
5381 out_overflow:
5382 print_overflow_msg(__func__, xdr);
5383 return -EIO;
5384 }
5385
5386 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5387 {
5388 __be32 *p;
5389 uint32_t opnum;
5390 int32_t nfserr;
5391
5392 p = xdr_inline_decode(xdr, 8);
5393 if (unlikely(!p))
5394 goto out_overflow;
5395 opnum = be32_to_cpup(p++);
5396 if (opnum != OP_SETCLIENTID) {
5397 dprintk("nfs: decode_setclientid: Server returned operation"
5398 " %d\n", opnum);
5399 return -EIO;
5400 }
5401 nfserr = be32_to_cpup(p);
5402 if (nfserr == NFS_OK) {
5403 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5404 if (unlikely(!p))
5405 goto out_overflow;
5406 p = xdr_decode_hyper(p, &res->clientid);
5407 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5408 } else if (nfserr == NFSERR_CLID_INUSE) {
5409 uint32_t len;
5410
5411 /* skip netid string */
5412 p = xdr_inline_decode(xdr, 4);
5413 if (unlikely(!p))
5414 goto out_overflow;
5415 len = be32_to_cpup(p);
5416 p = xdr_inline_decode(xdr, len);
5417 if (unlikely(!p))
5418 goto out_overflow;
5419
5420 /* skip uaddr string */
5421 p = xdr_inline_decode(xdr, 4);
5422 if (unlikely(!p))
5423 goto out_overflow;
5424 len = be32_to_cpup(p);
5425 p = xdr_inline_decode(xdr, len);
5426 if (unlikely(!p))
5427 goto out_overflow;
5428 return -NFSERR_CLID_INUSE;
5429 } else
5430 return nfs4_stat_to_errno(nfserr);
5431
5432 return 0;
5433 out_overflow:
5434 print_overflow_msg(__func__, xdr);
5435 return -EIO;
5436 }
5437
5438 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5439 {
5440 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5441 }
5442
5443 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5444 {
5445 __be32 *p;
5446 int status;
5447
5448 status = decode_op_hdr(xdr, OP_WRITE);
5449 if (status)
5450 return status;
5451
5452 p = xdr_inline_decode(xdr, 8);
5453 if (unlikely(!p))
5454 goto out_overflow;
5455 res->count = be32_to_cpup(p++);
5456 res->verf->committed = be32_to_cpup(p++);
5457 return decode_write_verifier(xdr, &res->verf->verifier);
5458 out_overflow:
5459 print_overflow_msg(__func__, xdr);
5460 return -EIO;
5461 }
5462
5463 static int decode_delegreturn(struct xdr_stream *xdr)
5464 {
5465 return decode_op_hdr(xdr, OP_DELEGRETURN);
5466 }
5467
5468 static int decode_secinfo_gss(struct xdr_stream *xdr,
5469 struct nfs4_secinfo4 *flavor)
5470 {
5471 u32 oid_len;
5472 __be32 *p;
5473
5474 p = xdr_inline_decode(xdr, 4);
5475 if (unlikely(!p))
5476 goto out_overflow;
5477 oid_len = be32_to_cpup(p);
5478 if (oid_len > GSS_OID_MAX_LEN)
5479 goto out_err;
5480
5481 p = xdr_inline_decode(xdr, oid_len);
5482 if (unlikely(!p))
5483 goto out_overflow;
5484 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5485 flavor->flavor_info.oid.len = oid_len;
5486
5487 p = xdr_inline_decode(xdr, 8);
5488 if (unlikely(!p))
5489 goto out_overflow;
5490 flavor->flavor_info.qop = be32_to_cpup(p++);
5491 flavor->flavor_info.service = be32_to_cpup(p);
5492
5493 return 0;
5494
5495 out_overflow:
5496 print_overflow_msg(__func__, xdr);
5497 return -EIO;
5498 out_err:
5499 return -EINVAL;
5500 }
5501
5502 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5503 {
5504 struct nfs4_secinfo4 *sec_flavor;
5505 unsigned int i, num_flavors;
5506 int status;
5507 __be32 *p;
5508
5509 p = xdr_inline_decode(xdr, 4);
5510 if (unlikely(!p))
5511 goto out_overflow;
5512
5513 res->flavors->num_flavors = 0;
5514 num_flavors = be32_to_cpup(p);
5515
5516 for (i = 0; i < num_flavors; i++) {
5517 sec_flavor = &res->flavors->flavors[i];
5518 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5519 break;
5520
5521 p = xdr_inline_decode(xdr, 4);
5522 if (unlikely(!p))
5523 goto out_overflow;
5524 sec_flavor->flavor = be32_to_cpup(p);
5525
5526 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5527 status = decode_secinfo_gss(xdr, sec_flavor);
5528 if (status)
5529 goto out;
5530 }
5531 res->flavors->num_flavors++;
5532 }
5533
5534 status = 0;
5535 out:
5536 return status;
5537 out_overflow:
5538 print_overflow_msg(__func__, xdr);
5539 return -EIO;
5540 }
5541
5542 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5543 {
5544 int status = decode_op_hdr(xdr, OP_SECINFO);
5545 if (status)
5546 return status;
5547 return decode_secinfo_common(xdr, res);
5548 }
5549
5550 #if defined(CONFIG_NFS_V4_1)
5551 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5552 {
5553 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5554 if (status)
5555 return status;
5556 return decode_secinfo_common(xdr, res);
5557 }
5558
5559 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5560 {
5561 __be32 *p;
5562 uint32_t bitmap_words;
5563 unsigned int i;
5564
5565 p = xdr_inline_decode(xdr, 4);
5566 bitmap_words = be32_to_cpup(p++);
5567 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5568 return -EIO;
5569 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5570 for (i = 0; i < bitmap_words; i++)
5571 op_map->u.words[i] = be32_to_cpup(p++);
5572
5573 return 0;
5574 }
5575
5576 static int decode_exchange_id(struct xdr_stream *xdr,
5577 struct nfs41_exchange_id_res *res)
5578 {
5579 __be32 *p;
5580 uint32_t dummy;
5581 char *dummy_str;
5582 int status;
5583 uint32_t impl_id_count;
5584
5585 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5586 if (status)
5587 return status;
5588
5589 p = xdr_inline_decode(xdr, 8);
5590 if (unlikely(!p))
5591 goto out_overflow;
5592 xdr_decode_hyper(p, &res->clientid);
5593 p = xdr_inline_decode(xdr, 12);
5594 if (unlikely(!p))
5595 goto out_overflow;
5596 res->seqid = be32_to_cpup(p++);
5597 res->flags = be32_to_cpup(p++);
5598
5599 res->state_protect.how = be32_to_cpup(p);
5600 switch (res->state_protect.how) {
5601 case SP4_NONE:
5602 break;
5603 case SP4_MACH_CRED:
5604 status = decode_op_map(xdr, &res->state_protect.enforce);
5605 if (status)
5606 return status;
5607 status = decode_op_map(xdr, &res->state_protect.allow);
5608 if (status)
5609 return status;
5610 break;
5611 default:
5612 WARN_ON_ONCE(1);
5613 return -EIO;
5614 }
5615
5616 /* server_owner4.so_minor_id */
5617 p = xdr_inline_decode(xdr, 8);
5618 if (unlikely(!p))
5619 goto out_overflow;
5620 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5621
5622 /* server_owner4.so_major_id */
5623 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5624 if (unlikely(status))
5625 return status;
5626 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5627 return -EIO;
5628 memcpy(res->server_owner->major_id, dummy_str, dummy);
5629 res->server_owner->major_id_sz = dummy;
5630
5631 /* server_scope4 */
5632 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5633 if (unlikely(status))
5634 return status;
5635 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5636 return -EIO;
5637 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5638 res->server_scope->server_scope_sz = dummy;
5639
5640 /* Implementation Id */
5641 p = xdr_inline_decode(xdr, 4);
5642 if (unlikely(!p))
5643 goto out_overflow;
5644 impl_id_count = be32_to_cpup(p++);
5645
5646 if (impl_id_count) {
5647 /* nii_domain */
5648 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5649 if (unlikely(status))
5650 return status;
5651 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5652 return -EIO;
5653 memcpy(res->impl_id->domain, dummy_str, dummy);
5654
5655 /* nii_name */
5656 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5657 if (unlikely(status))
5658 return status;
5659 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5660 return -EIO;
5661 memcpy(res->impl_id->name, dummy_str, dummy);
5662
5663 /* nii_date */
5664 p = xdr_inline_decode(xdr, 12);
5665 if (unlikely(!p))
5666 goto out_overflow;
5667 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5668 res->impl_id->date.nseconds = be32_to_cpup(p);
5669
5670 /* if there's more than one entry, ignore the rest */
5671 }
5672 return 0;
5673 out_overflow:
5674 print_overflow_msg(__func__, xdr);
5675 return -EIO;
5676 }
5677
5678 static int decode_chan_attrs(struct xdr_stream *xdr,
5679 struct nfs4_channel_attrs *attrs)
5680 {
5681 __be32 *p;
5682 u32 nr_attrs, val;
5683
5684 p = xdr_inline_decode(xdr, 28);
5685 if (unlikely(!p))
5686 goto out_overflow;
5687 val = be32_to_cpup(p++); /* headerpadsz */
5688 if (val)
5689 return -EINVAL; /* no support for header padding yet */
5690 attrs->max_rqst_sz = be32_to_cpup(p++);
5691 attrs->max_resp_sz = be32_to_cpup(p++);
5692 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5693 attrs->max_ops = be32_to_cpup(p++);
5694 attrs->max_reqs = be32_to_cpup(p++);
5695 nr_attrs = be32_to_cpup(p);
5696 if (unlikely(nr_attrs > 1)) {
5697 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5698 "count %u\n", __func__, nr_attrs);
5699 return -EINVAL;
5700 }
5701 if (nr_attrs == 1) {
5702 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5703 if (unlikely(!p))
5704 goto out_overflow;
5705 }
5706 return 0;
5707 out_overflow:
5708 print_overflow_msg(__func__, xdr);
5709 return -EIO;
5710 }
5711
5712 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5713 {
5714 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5715 }
5716
5717 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5718 struct nfs41_bind_conn_to_session_res *res)
5719 {
5720 __be32 *p;
5721 int status;
5722
5723 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5724 if (!status)
5725 status = decode_sessionid(xdr, &res->sessionid);
5726 if (unlikely(status))
5727 return status;
5728
5729 /* dir flags, rdma mode bool */
5730 p = xdr_inline_decode(xdr, 8);
5731 if (unlikely(!p))
5732 goto out_overflow;
5733
5734 res->dir = be32_to_cpup(p++);
5735 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5736 return -EIO;
5737 if (be32_to_cpup(p) == 0)
5738 res->use_conn_in_rdma_mode = false;
5739 else
5740 res->use_conn_in_rdma_mode = true;
5741
5742 return 0;
5743 out_overflow:
5744 print_overflow_msg(__func__, xdr);
5745 return -EIO;
5746 }
5747
5748 static int decode_create_session(struct xdr_stream *xdr,
5749 struct nfs41_create_session_res *res)
5750 {
5751 __be32 *p;
5752 int status;
5753
5754 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5755 if (!status)
5756 status = decode_sessionid(xdr, &res->sessionid);
5757 if (unlikely(status))
5758 return status;
5759
5760 /* seqid, flags */
5761 p = xdr_inline_decode(xdr, 8);
5762 if (unlikely(!p))
5763 goto out_overflow;
5764 res->seqid = be32_to_cpup(p++);
5765 res->flags = be32_to_cpup(p);
5766
5767 /* Channel attributes */
5768 status = decode_chan_attrs(xdr, &res->fc_attrs);
5769 if (!status)
5770 status = decode_chan_attrs(xdr, &res->bc_attrs);
5771 return status;
5772 out_overflow:
5773 print_overflow_msg(__func__, xdr);
5774 return -EIO;
5775 }
5776
5777 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5778 {
5779 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5780 }
5781
5782 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5783 {
5784 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5785 }
5786
5787 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5788 {
5789 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5790 }
5791 #endif /* CONFIG_NFS_V4_1 */
5792
5793 static int decode_sequence(struct xdr_stream *xdr,
5794 struct nfs4_sequence_res *res,
5795 struct rpc_rqst *rqstp)
5796 {
5797 #if defined(CONFIG_NFS_V4_1)
5798 struct nfs4_session *session;
5799 struct nfs4_sessionid id;
5800 u32 dummy;
5801 int status;
5802 __be32 *p;
5803
5804 if (res->sr_slot == NULL)
5805 return 0;
5806 if (!res->sr_slot->table->session)
5807 return 0;
5808
5809 status = decode_op_hdr(xdr, OP_SEQUENCE);
5810 if (!status)
5811 status = decode_sessionid(xdr, &id);
5812 if (unlikely(status))
5813 goto out_err;
5814
5815 /*
5816 * If the server returns different values for sessionID, slotID or
5817 * sequence number, the server is looney tunes.
5818 */
5819 status = -EREMOTEIO;
5820 session = res->sr_slot->table->session;
5821
5822 if (memcmp(id.data, session->sess_id.data,
5823 NFS4_MAX_SESSIONID_LEN)) {
5824 dprintk("%s Invalid session id\n", __func__);
5825 goto out_err;
5826 }
5827
5828 p = xdr_inline_decode(xdr, 20);
5829 if (unlikely(!p))
5830 goto out_overflow;
5831
5832 /* seqid */
5833 dummy = be32_to_cpup(p++);
5834 if (dummy != res->sr_slot->seq_nr) {
5835 dprintk("%s Invalid sequence number\n", __func__);
5836 goto out_err;
5837 }
5838 /* slot id */
5839 dummy = be32_to_cpup(p++);
5840 if (dummy != res->sr_slot->slot_nr) {
5841 dprintk("%s Invalid slot id\n", __func__);
5842 goto out_err;
5843 }
5844 /* highest slot id */
5845 res->sr_highest_slotid = be32_to_cpup(p++);
5846 /* target highest slot id */
5847 res->sr_target_highest_slotid = be32_to_cpup(p++);
5848 /* result flags */
5849 res->sr_status_flags = be32_to_cpup(p);
5850 status = 0;
5851 out_err:
5852 res->sr_status = status;
5853 return status;
5854 out_overflow:
5855 print_overflow_msg(__func__, xdr);
5856 status = -EIO;
5857 goto out_err;
5858 #else /* CONFIG_NFS_V4_1 */
5859 return 0;
5860 #endif /* CONFIG_NFS_V4_1 */
5861 }
5862
5863 #if defined(CONFIG_NFS_V4_1)
5864 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5865 {
5866 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5867 return decode_stateid(xdr, stateid);
5868 }
5869
5870 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5871 struct nfs4_getdeviceinfo_res *res)
5872 {
5873 struct pnfs_device *pdev = res->pdev;
5874 __be32 *p;
5875 uint32_t len, type;
5876 int status;
5877
5878 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5879 if (status) {
5880 if (status == -ETOOSMALL) {
5881 p = xdr_inline_decode(xdr, 4);
5882 if (unlikely(!p))
5883 goto out_overflow;
5884 pdev->mincount = be32_to_cpup(p);
5885 dprintk("%s: Min count too small. mincnt = %u\n",
5886 __func__, pdev->mincount);
5887 }
5888 return status;
5889 }
5890
5891 p = xdr_inline_decode(xdr, 8);
5892 if (unlikely(!p))
5893 goto out_overflow;
5894 type = be32_to_cpup(p++);
5895 if (type != pdev->layout_type) {
5896 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5897 __func__, pdev->layout_type, type);
5898 return -EINVAL;
5899 }
5900 /*
5901 * Get the length of the opaque device_addr4. xdr_read_pages places
5902 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5903 * and places the remaining xdr data in xdr_buf->tail
5904 */
5905 pdev->mincount = be32_to_cpup(p);
5906 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5907 goto out_overflow;
5908
5909 /* Parse notification bitmap, verifying that it is zero. */
5910 p = xdr_inline_decode(xdr, 4);
5911 if (unlikely(!p))
5912 goto out_overflow;
5913 len = be32_to_cpup(p);
5914 if (len) {
5915 uint32_t i;
5916
5917 p = xdr_inline_decode(xdr, 4 * len);
5918 if (unlikely(!p))
5919 goto out_overflow;
5920
5921 res->notification = be32_to_cpup(p++);
5922 for (i = 1; i < len; i++) {
5923 if (be32_to_cpup(p++)) {
5924 dprintk("%s: unsupported notification\n",
5925 __func__);
5926 return -EIO;
5927 }
5928 }
5929 }
5930 return 0;
5931 out_overflow:
5932 print_overflow_msg(__func__, xdr);
5933 return -EIO;
5934 }
5935
5936 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5937 struct nfs4_layoutget_res *res)
5938 {
5939 __be32 *p;
5940 int status;
5941 u32 layout_count;
5942 u32 recvd;
5943
5944 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5945 if (status)
5946 return status;
5947 p = xdr_inline_decode(xdr, 4);
5948 if (unlikely(!p))
5949 goto out_overflow;
5950 res->return_on_close = be32_to_cpup(p);
5951 decode_layout_stateid(xdr, &res->stateid);
5952 p = xdr_inline_decode(xdr, 4);
5953 if (unlikely(!p))
5954 goto out_overflow;
5955 layout_count = be32_to_cpup(p);
5956 if (!layout_count) {
5957 dprintk("%s: server responded with empty layout array\n",
5958 __func__);
5959 return -EINVAL;
5960 }
5961
5962 p = xdr_inline_decode(xdr, 28);
5963 if (unlikely(!p))
5964 goto out_overflow;
5965 p = xdr_decode_hyper(p, &res->range.offset);
5966 p = xdr_decode_hyper(p, &res->range.length);
5967 res->range.iomode = be32_to_cpup(p++);
5968 res->type = be32_to_cpup(p++);
5969 res->layoutp->len = be32_to_cpup(p);
5970
5971 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5972 __func__,
5973 (unsigned long)res->range.offset,
5974 (unsigned long)res->range.length,
5975 res->range.iomode,
5976 res->type,
5977 res->layoutp->len);
5978
5979 recvd = xdr_read_pages(xdr, res->layoutp->len);
5980 if (res->layoutp->len > recvd) {
5981 dprintk("NFS: server cheating in layoutget reply: "
5982 "layout len %u > recvd %u\n",
5983 res->layoutp->len, recvd);
5984 return -EINVAL;
5985 }
5986
5987 if (layout_count > 1) {
5988 /* We only handle a length one array at the moment. Any
5989 * further entries are just ignored. Note that this means
5990 * the client may see a response that is less than the
5991 * minimum it requested.
5992 */
5993 dprintk("%s: server responded with %d layouts, dropping tail\n",
5994 __func__, layout_count);
5995 }
5996
5997 return 0;
5998 out_overflow:
5999 print_overflow_msg(__func__, xdr);
6000 return -EIO;
6001 }
6002
6003 static int decode_layoutreturn(struct xdr_stream *xdr,
6004 struct nfs4_layoutreturn_res *res)
6005 {
6006 __be32 *p;
6007 int status;
6008
6009 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6010 if (status)
6011 return status;
6012 p = xdr_inline_decode(xdr, 4);
6013 if (unlikely(!p))
6014 goto out_overflow;
6015 res->lrs_present = be32_to_cpup(p);
6016 if (res->lrs_present)
6017 status = decode_layout_stateid(xdr, &res->stateid);
6018 return status;
6019 out_overflow:
6020 print_overflow_msg(__func__, xdr);
6021 return -EIO;
6022 }
6023
6024 static int decode_layoutcommit(struct xdr_stream *xdr,
6025 struct rpc_rqst *req,
6026 struct nfs4_layoutcommit_res *res)
6027 {
6028 __be32 *p;
6029 __u32 sizechanged;
6030 int status;
6031
6032 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6033 res->status = status;
6034 if (status)
6035 return status;
6036
6037 p = xdr_inline_decode(xdr, 4);
6038 if (unlikely(!p))
6039 goto out_overflow;
6040 sizechanged = be32_to_cpup(p);
6041
6042 if (sizechanged) {
6043 /* throw away new size */
6044 p = xdr_inline_decode(xdr, 8);
6045 if (unlikely(!p))
6046 goto out_overflow;
6047 }
6048 return 0;
6049 out_overflow:
6050 print_overflow_msg(__func__, xdr);
6051 return -EIO;
6052 }
6053
6054 static int decode_test_stateid(struct xdr_stream *xdr,
6055 struct nfs41_test_stateid_res *res)
6056 {
6057 __be32 *p;
6058 int status;
6059 int num_res;
6060
6061 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6062 if (status)
6063 return status;
6064
6065 p = xdr_inline_decode(xdr, 4);
6066 if (unlikely(!p))
6067 goto out_overflow;
6068 num_res = be32_to_cpup(p++);
6069 if (num_res != 1)
6070 goto out;
6071
6072 p = xdr_inline_decode(xdr, 4);
6073 if (unlikely(!p))
6074 goto out_overflow;
6075 res->status = be32_to_cpup(p++);
6076
6077 return status;
6078 out_overflow:
6079 print_overflow_msg(__func__, xdr);
6080 out:
6081 return -EIO;
6082 }
6083
6084 static int decode_free_stateid(struct xdr_stream *xdr,
6085 struct nfs41_free_stateid_res *res)
6086 {
6087 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6088 return res->status;
6089 }
6090 #endif /* CONFIG_NFS_V4_1 */
6091
6092 /*
6093 * END OF "GENERIC" DECODE ROUTINES.
6094 */
6095
6096 /*
6097 * Decode OPEN_DOWNGRADE response
6098 */
6099 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6100 struct xdr_stream *xdr,
6101 struct nfs_closeres *res)
6102 {
6103 struct compound_hdr hdr;
6104 int status;
6105
6106 status = decode_compound_hdr(xdr, &hdr);
6107 if (status)
6108 goto out;
6109 status = decode_sequence(xdr, &res->seq_res, rqstp);
6110 if (status)
6111 goto out;
6112 status = decode_putfh(xdr);
6113 if (status)
6114 goto out;
6115 status = decode_open_downgrade(xdr, res);
6116 if (status != 0)
6117 goto out;
6118 decode_getfattr(xdr, res->fattr, res->server);
6119 out:
6120 return status;
6121 }
6122
6123 /*
6124 * Decode ACCESS response
6125 */
6126 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6127 struct nfs4_accessres *res)
6128 {
6129 struct compound_hdr hdr;
6130 int status;
6131
6132 status = decode_compound_hdr(xdr, &hdr);
6133 if (status)
6134 goto out;
6135 status = decode_sequence(xdr, &res->seq_res, rqstp);
6136 if (status)
6137 goto out;
6138 status = decode_putfh(xdr);
6139 if (status != 0)
6140 goto out;
6141 status = decode_access(xdr, &res->supported, &res->access);
6142 if (status != 0)
6143 goto out;
6144 decode_getfattr(xdr, res->fattr, res->server);
6145 out:
6146 return status;
6147 }
6148
6149 /*
6150 * Decode LOOKUP response
6151 */
6152 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6153 struct nfs4_lookup_res *res)
6154 {
6155 struct compound_hdr hdr;
6156 int status;
6157
6158 status = decode_compound_hdr(xdr, &hdr);
6159 if (status)
6160 goto out;
6161 status = decode_sequence(xdr, &res->seq_res, rqstp);
6162 if (status)
6163 goto out;
6164 status = decode_putfh(xdr);
6165 if (status)
6166 goto out;
6167 status = decode_lookup(xdr);
6168 if (status)
6169 goto out;
6170 status = decode_getfh(xdr, res->fh);
6171 if (status)
6172 goto out;
6173 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6174 out:
6175 return status;
6176 }
6177
6178 /*
6179 * Decode LOOKUP_ROOT response
6180 */
6181 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6182 struct xdr_stream *xdr,
6183 struct nfs4_lookup_res *res)
6184 {
6185 struct compound_hdr hdr;
6186 int status;
6187
6188 status = decode_compound_hdr(xdr, &hdr);
6189 if (status)
6190 goto out;
6191 status = decode_sequence(xdr, &res->seq_res, rqstp);
6192 if (status)
6193 goto out;
6194 status = decode_putrootfh(xdr);
6195 if (status)
6196 goto out;
6197 status = decode_getfh(xdr, res->fh);
6198 if (status == 0)
6199 status = decode_getfattr_label(xdr, res->fattr,
6200 res->label, res->server);
6201 out:
6202 return status;
6203 }
6204
6205 /*
6206 * Decode REMOVE response
6207 */
6208 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6209 struct nfs_removeres *res)
6210 {
6211 struct compound_hdr hdr;
6212 int status;
6213
6214 status = decode_compound_hdr(xdr, &hdr);
6215 if (status)
6216 goto out;
6217 status = decode_sequence(xdr, &res->seq_res, rqstp);
6218 if (status)
6219 goto out;
6220 status = decode_putfh(xdr);
6221 if (status)
6222 goto out;
6223 status = decode_remove(xdr, &res->cinfo);
6224 out:
6225 return status;
6226 }
6227
6228 /*
6229 * Decode RENAME response
6230 */
6231 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6232 struct nfs_renameres *res)
6233 {
6234 struct compound_hdr hdr;
6235 int status;
6236
6237 status = decode_compound_hdr(xdr, &hdr);
6238 if (status)
6239 goto out;
6240 status = decode_sequence(xdr, &res->seq_res, rqstp);
6241 if (status)
6242 goto out;
6243 status = decode_putfh(xdr);
6244 if (status)
6245 goto out;
6246 status = decode_savefh(xdr);
6247 if (status)
6248 goto out;
6249 status = decode_putfh(xdr);
6250 if (status)
6251 goto out;
6252 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6253 out:
6254 return status;
6255 }
6256
6257 /*
6258 * Decode LINK response
6259 */
6260 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261 struct nfs4_link_res *res)
6262 {
6263 struct compound_hdr hdr;
6264 int status;
6265
6266 status = decode_compound_hdr(xdr, &hdr);
6267 if (status)
6268 goto out;
6269 status = decode_sequence(xdr, &res->seq_res, rqstp);
6270 if (status)
6271 goto out;
6272 status = decode_putfh(xdr);
6273 if (status)
6274 goto out;
6275 status = decode_savefh(xdr);
6276 if (status)
6277 goto out;
6278 status = decode_putfh(xdr);
6279 if (status)
6280 goto out;
6281 status = decode_link(xdr, &res->cinfo);
6282 if (status)
6283 goto out;
6284 /*
6285 * Note order: OP_LINK leaves the directory as the current
6286 * filehandle.
6287 */
6288 status = decode_restorefh(xdr);
6289 if (status)
6290 goto out;
6291 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6292 out:
6293 return status;
6294 }
6295
6296 /*
6297 * Decode CREATE response
6298 */
6299 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300 struct nfs4_create_res *res)
6301 {
6302 struct compound_hdr hdr;
6303 int status;
6304
6305 status = decode_compound_hdr(xdr, &hdr);
6306 if (status)
6307 goto out;
6308 status = decode_sequence(xdr, &res->seq_res, rqstp);
6309 if (status)
6310 goto out;
6311 status = decode_putfh(xdr);
6312 if (status)
6313 goto out;
6314 status = decode_create(xdr, &res->dir_cinfo);
6315 if (status)
6316 goto out;
6317 status = decode_getfh(xdr, res->fh);
6318 if (status)
6319 goto out;
6320 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6321 out:
6322 return status;
6323 }
6324
6325 /*
6326 * Decode SYMLINK response
6327 */
6328 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329 struct nfs4_create_res *res)
6330 {
6331 return nfs4_xdr_dec_create(rqstp, xdr, res);
6332 }
6333
6334 /*
6335 * Decode GETATTR response
6336 */
6337 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6338 struct nfs4_getattr_res *res)
6339 {
6340 struct compound_hdr hdr;
6341 int status;
6342
6343 status = decode_compound_hdr(xdr, &hdr);
6344 if (status)
6345 goto out;
6346 status = decode_sequence(xdr, &res->seq_res, rqstp);
6347 if (status)
6348 goto out;
6349 status = decode_putfh(xdr);
6350 if (status)
6351 goto out;
6352 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6353 out:
6354 return status;
6355 }
6356
6357 /*
6358 * Encode an SETACL request
6359 */
6360 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6361 struct nfs_setaclargs *args)
6362 {
6363 struct compound_hdr hdr = {
6364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6365 };
6366
6367 encode_compound_hdr(xdr, req, &hdr);
6368 encode_sequence(xdr, &args->seq_args, &hdr);
6369 encode_putfh(xdr, args->fh, &hdr);
6370 encode_setacl(xdr, args, &hdr);
6371 encode_nops(&hdr);
6372 }
6373
6374 /*
6375 * Decode SETACL response
6376 */
6377 static int
6378 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379 struct nfs_setaclres *res)
6380 {
6381 struct compound_hdr hdr;
6382 int status;
6383
6384 status = decode_compound_hdr(xdr, &hdr);
6385 if (status)
6386 goto out;
6387 status = decode_sequence(xdr, &res->seq_res, rqstp);
6388 if (status)
6389 goto out;
6390 status = decode_putfh(xdr);
6391 if (status)
6392 goto out;
6393 status = decode_setattr(xdr);
6394 out:
6395 return status;
6396 }
6397
6398 /*
6399 * Decode GETACL response
6400 */
6401 static int
6402 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6403 struct nfs_getaclres *res)
6404 {
6405 struct compound_hdr hdr;
6406 int status;
6407
6408 if (res->acl_scratch != NULL) {
6409 void *p = page_address(res->acl_scratch);
6410 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6411 }
6412 status = decode_compound_hdr(xdr, &hdr);
6413 if (status)
6414 goto out;
6415 status = decode_sequence(xdr, &res->seq_res, rqstp);
6416 if (status)
6417 goto out;
6418 status = decode_putfh(xdr);
6419 if (status)
6420 goto out;
6421 status = decode_getacl(xdr, rqstp, res);
6422
6423 out:
6424 return status;
6425 }
6426
6427 /*
6428 * Decode CLOSE response
6429 */
6430 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431 struct nfs_closeres *res)
6432 {
6433 struct compound_hdr hdr;
6434 int status;
6435
6436 status = decode_compound_hdr(xdr, &hdr);
6437 if (status)
6438 goto out;
6439 status = decode_sequence(xdr, &res->seq_res, rqstp);
6440 if (status)
6441 goto out;
6442 status = decode_putfh(xdr);
6443 if (status)
6444 goto out;
6445 status = decode_close(xdr, res);
6446 if (status != 0)
6447 goto out;
6448 /*
6449 * Note: Server may do delete on close for this file
6450 * in which case the getattr call will fail with
6451 * an ESTALE error. Shouldn't be a problem,
6452 * though, since fattr->valid will remain unset.
6453 */
6454 decode_getfattr(xdr, res->fattr, res->server);
6455 out:
6456 return status;
6457 }
6458
6459 /*
6460 * Decode OPEN response
6461 */
6462 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6463 struct nfs_openres *res)
6464 {
6465 struct compound_hdr hdr;
6466 int status;
6467
6468 status = decode_compound_hdr(xdr, &hdr);
6469 if (status)
6470 goto out;
6471 status = decode_sequence(xdr, &res->seq_res, rqstp);
6472 if (status)
6473 goto out;
6474 status = decode_putfh(xdr);
6475 if (status)
6476 goto out;
6477 status = decode_open(xdr, res);
6478 if (status)
6479 goto out;
6480 status = decode_getfh(xdr, &res->fh);
6481 if (status)
6482 goto out;
6483 if (res->access_request)
6484 decode_access(xdr, &res->access_supported, &res->access_result);
6485 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6486 out:
6487 return status;
6488 }
6489
6490 /*
6491 * Decode OPEN_CONFIRM response
6492 */
6493 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6494 struct xdr_stream *xdr,
6495 struct nfs_open_confirmres *res)
6496 {
6497 struct compound_hdr hdr;
6498 int status;
6499
6500 status = decode_compound_hdr(xdr, &hdr);
6501 if (status)
6502 goto out;
6503 status = decode_putfh(xdr);
6504 if (status)
6505 goto out;
6506 status = decode_open_confirm(xdr, res);
6507 out:
6508 return status;
6509 }
6510
6511 /*
6512 * Decode OPEN response
6513 */
6514 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6515 struct xdr_stream *xdr,
6516 struct nfs_openres *res)
6517 {
6518 struct compound_hdr hdr;
6519 int status;
6520
6521 status = decode_compound_hdr(xdr, &hdr);
6522 if (status)
6523 goto out;
6524 status = decode_sequence(xdr, &res->seq_res, rqstp);
6525 if (status)
6526 goto out;
6527 status = decode_putfh(xdr);
6528 if (status)
6529 goto out;
6530 status = decode_open(xdr, res);
6531 if (status)
6532 goto out;
6533 if (res->access_request)
6534 decode_access(xdr, &res->access_supported, &res->access_result);
6535 decode_getfattr(xdr, res->f_attr, res->server);
6536 out:
6537 return status;
6538 }
6539
6540 /*
6541 * Decode SETATTR response
6542 */
6543 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6544 struct xdr_stream *xdr,
6545 struct nfs_setattrres *res)
6546 {
6547 struct compound_hdr hdr;
6548 int status;
6549
6550 status = decode_compound_hdr(xdr, &hdr);
6551 if (status)
6552 goto out;
6553 status = decode_sequence(xdr, &res->seq_res, rqstp);
6554 if (status)
6555 goto out;
6556 status = decode_putfh(xdr);
6557 if (status)
6558 goto out;
6559 status = decode_setattr(xdr);
6560 if (status)
6561 goto out;
6562 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6563 out:
6564 return status;
6565 }
6566
6567 /*
6568 * Decode LOCK response
6569 */
6570 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6571 struct nfs_lock_res *res)
6572 {
6573 struct compound_hdr hdr;
6574 int status;
6575
6576 status = decode_compound_hdr(xdr, &hdr);
6577 if (status)
6578 goto out;
6579 status = decode_sequence(xdr, &res->seq_res, rqstp);
6580 if (status)
6581 goto out;
6582 status = decode_putfh(xdr);
6583 if (status)
6584 goto out;
6585 status = decode_lock(xdr, res);
6586 out:
6587 return status;
6588 }
6589
6590 /*
6591 * Decode LOCKT response
6592 */
6593 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6594 struct nfs_lockt_res *res)
6595 {
6596 struct compound_hdr hdr;
6597 int status;
6598
6599 status = decode_compound_hdr(xdr, &hdr);
6600 if (status)
6601 goto out;
6602 status = decode_sequence(xdr, &res->seq_res, rqstp);
6603 if (status)
6604 goto out;
6605 status = decode_putfh(xdr);
6606 if (status)
6607 goto out;
6608 status = decode_lockt(xdr, res);
6609 out:
6610 return status;
6611 }
6612
6613 /*
6614 * Decode LOCKU response
6615 */
6616 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6617 struct nfs_locku_res *res)
6618 {
6619 struct compound_hdr hdr;
6620 int status;
6621
6622 status = decode_compound_hdr(xdr, &hdr);
6623 if (status)
6624 goto out;
6625 status = decode_sequence(xdr, &res->seq_res, rqstp);
6626 if (status)
6627 goto out;
6628 status = decode_putfh(xdr);
6629 if (status)
6630 goto out;
6631 status = decode_locku(xdr, res);
6632 out:
6633 return status;
6634 }
6635
6636 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6637 struct xdr_stream *xdr, void *dummy)
6638 {
6639 struct compound_hdr hdr;
6640 int status;
6641
6642 status = decode_compound_hdr(xdr, &hdr);
6643 if (!status)
6644 status = decode_release_lockowner(xdr);
6645 return status;
6646 }
6647
6648 /*
6649 * Decode READLINK response
6650 */
6651 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6652 struct xdr_stream *xdr,
6653 struct nfs4_readlink_res *res)
6654 {
6655 struct compound_hdr hdr;
6656 int status;
6657
6658 status = decode_compound_hdr(xdr, &hdr);
6659 if (status)
6660 goto out;
6661 status = decode_sequence(xdr, &res->seq_res, rqstp);
6662 if (status)
6663 goto out;
6664 status = decode_putfh(xdr);
6665 if (status)
6666 goto out;
6667 status = decode_readlink(xdr, rqstp);
6668 out:
6669 return status;
6670 }
6671
6672 /*
6673 * Decode READDIR response
6674 */
6675 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6676 struct nfs4_readdir_res *res)
6677 {
6678 struct compound_hdr hdr;
6679 int status;
6680
6681 status = decode_compound_hdr(xdr, &hdr);
6682 if (status)
6683 goto out;
6684 status = decode_sequence(xdr, &res->seq_res, rqstp);
6685 if (status)
6686 goto out;
6687 status = decode_putfh(xdr);
6688 if (status)
6689 goto out;
6690 status = decode_readdir(xdr, rqstp, res);
6691 out:
6692 return status;
6693 }
6694
6695 /*
6696 * Decode Read response
6697 */
6698 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6699 struct nfs_pgio_res *res)
6700 {
6701 struct compound_hdr hdr;
6702 int status;
6703
6704 status = decode_compound_hdr(xdr, &hdr);
6705 res->op_status = hdr.status;
6706 if (status)
6707 goto out;
6708 status = decode_sequence(xdr, &res->seq_res, rqstp);
6709 if (status)
6710 goto out;
6711 status = decode_putfh(xdr);
6712 if (status)
6713 goto out;
6714 status = decode_read(xdr, rqstp, res);
6715 if (!status)
6716 status = res->count;
6717 out:
6718 return status;
6719 }
6720
6721 /*
6722 * Decode WRITE response
6723 */
6724 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725 struct nfs_pgio_res *res)
6726 {
6727 struct compound_hdr hdr;
6728 int status;
6729
6730 status = decode_compound_hdr(xdr, &hdr);
6731 res->op_status = hdr.status;
6732 if (status)
6733 goto out;
6734 status = decode_sequence(xdr, &res->seq_res, rqstp);
6735 if (status)
6736 goto out;
6737 status = decode_putfh(xdr);
6738 if (status)
6739 goto out;
6740 status = decode_write(xdr, res);
6741 if (status)
6742 goto out;
6743 if (res->fattr)
6744 decode_getfattr(xdr, res->fattr, res->server);
6745 if (!status)
6746 status = res->count;
6747 out:
6748 return status;
6749 }
6750
6751 /*
6752 * Decode COMMIT response
6753 */
6754 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6755 struct nfs_commitres *res)
6756 {
6757 struct compound_hdr hdr;
6758 int status;
6759
6760 status = decode_compound_hdr(xdr, &hdr);
6761 res->op_status = hdr.status;
6762 if (status)
6763 goto out;
6764 status = decode_sequence(xdr, &res->seq_res, rqstp);
6765 if (status)
6766 goto out;
6767 status = decode_putfh(xdr);
6768 if (status)
6769 goto out;
6770 status = decode_commit(xdr, res);
6771 out:
6772 return status;
6773 }
6774
6775 /*
6776 * Decode FSINFO response
6777 */
6778 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6779 struct nfs4_fsinfo_res *res)
6780 {
6781 struct compound_hdr hdr;
6782 int status;
6783
6784 status = decode_compound_hdr(xdr, &hdr);
6785 if (!status)
6786 status = decode_sequence(xdr, &res->seq_res, req);
6787 if (!status)
6788 status = decode_putfh(xdr);
6789 if (!status)
6790 status = decode_fsinfo(xdr, res->fsinfo);
6791 return status;
6792 }
6793
6794 /*
6795 * Decode PATHCONF response
6796 */
6797 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6798 struct nfs4_pathconf_res *res)
6799 {
6800 struct compound_hdr hdr;
6801 int status;
6802
6803 status = decode_compound_hdr(xdr, &hdr);
6804 if (!status)
6805 status = decode_sequence(xdr, &res->seq_res, req);
6806 if (!status)
6807 status = decode_putfh(xdr);
6808 if (!status)
6809 status = decode_pathconf(xdr, res->pathconf);
6810 return status;
6811 }
6812
6813 /*
6814 * Decode STATFS response
6815 */
6816 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6817 struct nfs4_statfs_res *res)
6818 {
6819 struct compound_hdr hdr;
6820 int status;
6821
6822 status = decode_compound_hdr(xdr, &hdr);
6823 if (!status)
6824 status = decode_sequence(xdr, &res->seq_res, req);
6825 if (!status)
6826 status = decode_putfh(xdr);
6827 if (!status)
6828 status = decode_statfs(xdr, res->fsstat);
6829 return status;
6830 }
6831
6832 /*
6833 * Decode GETATTR_BITMAP response
6834 */
6835 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6836 struct xdr_stream *xdr,
6837 struct nfs4_server_caps_res *res)
6838 {
6839 struct compound_hdr hdr;
6840 int status;
6841
6842 status = decode_compound_hdr(xdr, &hdr);
6843 if (status)
6844 goto out;
6845 status = decode_sequence(xdr, &res->seq_res, req);
6846 if (status)
6847 goto out;
6848 status = decode_putfh(xdr);
6849 if (status)
6850 goto out;
6851 status = decode_server_caps(xdr, res);
6852 out:
6853 return status;
6854 }
6855
6856 /*
6857 * Decode RENEW response
6858 */
6859 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6860 void *__unused)
6861 {
6862 struct compound_hdr hdr;
6863 int status;
6864
6865 status = decode_compound_hdr(xdr, &hdr);
6866 if (!status)
6867 status = decode_renew(xdr);
6868 return status;
6869 }
6870
6871 /*
6872 * Decode SETCLIENTID response
6873 */
6874 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6875 struct xdr_stream *xdr,
6876 struct nfs4_setclientid_res *res)
6877 {
6878 struct compound_hdr hdr;
6879 int status;
6880
6881 status = decode_compound_hdr(xdr, &hdr);
6882 if (!status)
6883 status = decode_setclientid(xdr, res);
6884 return status;
6885 }
6886
6887 /*
6888 * Decode SETCLIENTID_CONFIRM response
6889 */
6890 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6891 struct xdr_stream *xdr)
6892 {
6893 struct compound_hdr hdr;
6894 int status;
6895
6896 status = decode_compound_hdr(xdr, &hdr);
6897 if (!status)
6898 status = decode_setclientid_confirm(xdr);
6899 return status;
6900 }
6901
6902 /*
6903 * Decode DELEGRETURN response
6904 */
6905 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6906 struct xdr_stream *xdr,
6907 struct nfs4_delegreturnres *res)
6908 {
6909 struct compound_hdr hdr;
6910 int status;
6911
6912 status = decode_compound_hdr(xdr, &hdr);
6913 if (status)
6914 goto out;
6915 status = decode_sequence(xdr, &res->seq_res, rqstp);
6916 if (status)
6917 goto out;
6918 status = decode_putfh(xdr);
6919 if (status != 0)
6920 goto out;
6921 status = decode_getfattr(xdr, res->fattr, res->server);
6922 if (status != 0)
6923 goto out;
6924 status = decode_delegreturn(xdr);
6925 out:
6926 return status;
6927 }
6928
6929 /*
6930 * Decode FS_LOCATIONS response
6931 */
6932 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6933 struct xdr_stream *xdr,
6934 struct nfs4_fs_locations_res *res)
6935 {
6936 struct compound_hdr hdr;
6937 int status;
6938
6939 status = decode_compound_hdr(xdr, &hdr);
6940 if (status)
6941 goto out;
6942 status = decode_sequence(xdr, &res->seq_res, req);
6943 if (status)
6944 goto out;
6945 status = decode_putfh(xdr);
6946 if (status)
6947 goto out;
6948 if (res->migration) {
6949 xdr_enter_page(xdr, PAGE_SIZE);
6950 status = decode_getfattr_generic(xdr,
6951 &res->fs_locations->fattr,
6952 NULL, res->fs_locations,
6953 NULL, res->fs_locations->server);
6954 if (status)
6955 goto out;
6956 if (res->renew)
6957 status = decode_renew(xdr);
6958 } else {
6959 status = decode_lookup(xdr);
6960 if (status)
6961 goto out;
6962 xdr_enter_page(xdr, PAGE_SIZE);
6963 status = decode_getfattr_generic(xdr,
6964 &res->fs_locations->fattr,
6965 NULL, res->fs_locations,
6966 NULL, res->fs_locations->server);
6967 }
6968 out:
6969 return status;
6970 }
6971
6972 /*
6973 * Decode SECINFO response
6974 */
6975 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6976 struct xdr_stream *xdr,
6977 struct nfs4_secinfo_res *res)
6978 {
6979 struct compound_hdr hdr;
6980 int status;
6981
6982 status = decode_compound_hdr(xdr, &hdr);
6983 if (status)
6984 goto out;
6985 status = decode_sequence(xdr, &res->seq_res, rqstp);
6986 if (status)
6987 goto out;
6988 status = decode_putfh(xdr);
6989 if (status)
6990 goto out;
6991 status = decode_secinfo(xdr, res);
6992 out:
6993 return status;
6994 }
6995
6996 /*
6997 * Decode FSID_PRESENT response
6998 */
6999 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7000 struct xdr_stream *xdr,
7001 struct nfs4_fsid_present_res *res)
7002 {
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (status)
7008 goto out;
7009 status = decode_sequence(xdr, &res->seq_res, rqstp);
7010 if (status)
7011 goto out;
7012 status = decode_putfh(xdr);
7013 if (status)
7014 goto out;
7015 status = decode_getfh(xdr, res->fh);
7016 if (status)
7017 goto out;
7018 if (res->renew)
7019 status = decode_renew(xdr);
7020 out:
7021 return status;
7022 }
7023
7024 #if defined(CONFIG_NFS_V4_1)
7025 /*
7026 * Decode BIND_CONN_TO_SESSION response
7027 */
7028 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7029 struct xdr_stream *xdr,
7030 void *res)
7031 {
7032 struct compound_hdr hdr;
7033 int status;
7034
7035 status = decode_compound_hdr(xdr, &hdr);
7036 if (!status)
7037 status = decode_bind_conn_to_session(xdr, res);
7038 return status;
7039 }
7040
7041 /*
7042 * Decode EXCHANGE_ID response
7043 */
7044 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7045 struct xdr_stream *xdr,
7046 void *res)
7047 {
7048 struct compound_hdr hdr;
7049 int status;
7050
7051 status = decode_compound_hdr(xdr, &hdr);
7052 if (!status)
7053 status = decode_exchange_id(xdr, res);
7054 return status;
7055 }
7056
7057 /*
7058 * Decode CREATE_SESSION response
7059 */
7060 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7061 struct xdr_stream *xdr,
7062 struct nfs41_create_session_res *res)
7063 {
7064 struct compound_hdr hdr;
7065 int status;
7066
7067 status = decode_compound_hdr(xdr, &hdr);
7068 if (!status)
7069 status = decode_create_session(xdr, res);
7070 return status;
7071 }
7072
7073 /*
7074 * Decode DESTROY_SESSION response
7075 */
7076 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7077 struct xdr_stream *xdr,
7078 void *res)
7079 {
7080 struct compound_hdr hdr;
7081 int status;
7082
7083 status = decode_compound_hdr(xdr, &hdr);
7084 if (!status)
7085 status = decode_destroy_session(xdr, res);
7086 return status;
7087 }
7088
7089 /*
7090 * Decode DESTROY_CLIENTID response
7091 */
7092 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7093 struct xdr_stream *xdr,
7094 void *res)
7095 {
7096 struct compound_hdr hdr;
7097 int status;
7098
7099 status = decode_compound_hdr(xdr, &hdr);
7100 if (!status)
7101 status = decode_destroy_clientid(xdr, res);
7102 return status;
7103 }
7104
7105 /*
7106 * Decode SEQUENCE response
7107 */
7108 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7109 struct xdr_stream *xdr,
7110 struct nfs4_sequence_res *res)
7111 {
7112 struct compound_hdr hdr;
7113 int status;
7114
7115 status = decode_compound_hdr(xdr, &hdr);
7116 if (!status)
7117 status = decode_sequence(xdr, res, rqstp);
7118 return status;
7119 }
7120
7121 /*
7122 * Decode GET_LEASE_TIME response
7123 */
7124 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7125 struct xdr_stream *xdr,
7126 struct nfs4_get_lease_time_res *res)
7127 {
7128 struct compound_hdr hdr;
7129 int status;
7130
7131 status = decode_compound_hdr(xdr, &hdr);
7132 if (!status)
7133 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7134 if (!status)
7135 status = decode_putrootfh(xdr);
7136 if (!status)
7137 status = decode_fsinfo(xdr, res->lr_fsinfo);
7138 return status;
7139 }
7140
7141 /*
7142 * Decode RECLAIM_COMPLETE response
7143 */
7144 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7145 struct xdr_stream *xdr,
7146 struct nfs41_reclaim_complete_res *res)
7147 {
7148 struct compound_hdr hdr;
7149 int status;
7150
7151 status = decode_compound_hdr(xdr, &hdr);
7152 if (!status)
7153 status = decode_sequence(xdr, &res->seq_res, rqstp);
7154 if (!status)
7155 status = decode_reclaim_complete(xdr, NULL);
7156 return status;
7157 }
7158
7159 /*
7160 * Decode GETDEVINFO response
7161 */
7162 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7163 struct xdr_stream *xdr,
7164 struct nfs4_getdeviceinfo_res *res)
7165 {
7166 struct compound_hdr hdr;
7167 int status;
7168
7169 status = decode_compound_hdr(xdr, &hdr);
7170 if (status != 0)
7171 goto out;
7172 status = decode_sequence(xdr, &res->seq_res, rqstp);
7173 if (status != 0)
7174 goto out;
7175 status = decode_getdeviceinfo(xdr, res);
7176 out:
7177 return status;
7178 }
7179
7180 /*
7181 * Decode LAYOUTGET response
7182 */
7183 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7184 struct xdr_stream *xdr,
7185 struct nfs4_layoutget_res *res)
7186 {
7187 struct compound_hdr hdr;
7188 int status;
7189
7190 status = decode_compound_hdr(xdr, &hdr);
7191 if (status)
7192 goto out;
7193 status = decode_sequence(xdr, &res->seq_res, rqstp);
7194 if (status)
7195 goto out;
7196 status = decode_putfh(xdr);
7197 if (status)
7198 goto out;
7199 status = decode_layoutget(xdr, rqstp, res);
7200 out:
7201 return status;
7202 }
7203
7204 /*
7205 * Decode LAYOUTRETURN response
7206 */
7207 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7208 struct xdr_stream *xdr,
7209 struct nfs4_layoutreturn_res *res)
7210 {
7211 struct compound_hdr hdr;
7212 int status;
7213
7214 status = decode_compound_hdr(xdr, &hdr);
7215 if (status)
7216 goto out;
7217 status = decode_sequence(xdr, &res->seq_res, rqstp);
7218 if (status)
7219 goto out;
7220 status = decode_putfh(xdr);
7221 if (status)
7222 goto out;
7223 status = decode_layoutreturn(xdr, res);
7224 out:
7225 return status;
7226 }
7227
7228 /*
7229 * Decode LAYOUTCOMMIT response
7230 */
7231 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7232 struct xdr_stream *xdr,
7233 struct nfs4_layoutcommit_res *res)
7234 {
7235 struct compound_hdr hdr;
7236 int status;
7237
7238 status = decode_compound_hdr(xdr, &hdr);
7239 if (status)
7240 goto out;
7241 status = decode_sequence(xdr, &res->seq_res, rqstp);
7242 if (status)
7243 goto out;
7244 status = decode_putfh(xdr);
7245 if (status)
7246 goto out;
7247 status = decode_layoutcommit(xdr, rqstp, res);
7248 if (status)
7249 goto out;
7250 decode_getfattr(xdr, res->fattr, res->server);
7251 out:
7252 return status;
7253 }
7254
7255 /*
7256 * Decode SECINFO_NO_NAME response
7257 */
7258 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7259 struct xdr_stream *xdr,
7260 struct nfs4_secinfo_res *res)
7261 {
7262 struct compound_hdr hdr;
7263 int status;
7264
7265 status = decode_compound_hdr(xdr, &hdr);
7266 if (status)
7267 goto out;
7268 status = decode_sequence(xdr, &res->seq_res, rqstp);
7269 if (status)
7270 goto out;
7271 status = decode_putrootfh(xdr);
7272 if (status)
7273 goto out;
7274 status = decode_secinfo_no_name(xdr, res);
7275 out:
7276 return status;
7277 }
7278
7279 /*
7280 * Decode TEST_STATEID response
7281 */
7282 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7283 struct xdr_stream *xdr,
7284 struct nfs41_test_stateid_res *res)
7285 {
7286 struct compound_hdr hdr;
7287 int status;
7288
7289 status = decode_compound_hdr(xdr, &hdr);
7290 if (status)
7291 goto out;
7292 status = decode_sequence(xdr, &res->seq_res, rqstp);
7293 if (status)
7294 goto out;
7295 status = decode_test_stateid(xdr, res);
7296 out:
7297 return status;
7298 }
7299
7300 /*
7301 * Decode FREE_STATEID response
7302 */
7303 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7304 struct xdr_stream *xdr,
7305 struct nfs41_free_stateid_res *res)
7306 {
7307 struct compound_hdr hdr;
7308 int status;
7309
7310 status = decode_compound_hdr(xdr, &hdr);
7311 if (status)
7312 goto out;
7313 status = decode_sequence(xdr, &res->seq_res, rqstp);
7314 if (status)
7315 goto out;
7316 status = decode_free_stateid(xdr, res);
7317 out:
7318 return status;
7319 }
7320 #endif /* CONFIG_NFS_V4_1 */
7321
7322 /**
7323 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7324 * the local page cache.
7325 * @xdr: XDR stream where entry resides
7326 * @entry: buffer to fill in with entry data
7327 * @plus: boolean indicating whether this should be a readdirplus entry
7328 *
7329 * Returns zero if successful, otherwise a negative errno value is
7330 * returned.
7331 *
7332 * This function is not invoked during READDIR reply decoding, but
7333 * rather whenever an application invokes the getdents(2) system call
7334 * on a directory already in our cache.
7335 */
7336 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7337 int plus)
7338 {
7339 unsigned int savep;
7340 uint32_t bitmap[3] = {0};
7341 uint32_t len;
7342 __be32 *p = xdr_inline_decode(xdr, 4);
7343 if (unlikely(!p))
7344 goto out_overflow;
7345 if (*p == xdr_zero) {
7346 p = xdr_inline_decode(xdr, 4);
7347 if (unlikely(!p))
7348 goto out_overflow;
7349 if (*p == xdr_zero)
7350 return -EAGAIN;
7351 entry->eof = 1;
7352 return -EBADCOOKIE;
7353 }
7354
7355 p = xdr_inline_decode(xdr, 12);
7356 if (unlikely(!p))
7357 goto out_overflow;
7358 entry->prev_cookie = entry->cookie;
7359 p = xdr_decode_hyper(p, &entry->cookie);
7360 entry->len = be32_to_cpup(p);
7361
7362 p = xdr_inline_decode(xdr, entry->len);
7363 if (unlikely(!p))
7364 goto out_overflow;
7365 entry->name = (const char *) p;
7366
7367 /*
7368 * In case the server doesn't return an inode number,
7369 * we fake one here. (We don't use inode number 0,
7370 * since glibc seems to choke on it...)
7371 */
7372 entry->ino = 1;
7373 entry->fattr->valid = 0;
7374
7375 if (decode_attr_bitmap(xdr, bitmap) < 0)
7376 goto out_overflow;
7377
7378 if (decode_attr_length(xdr, &len, &savep) < 0)
7379 goto out_overflow;
7380
7381 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7382 NULL, entry->label, entry->server) < 0)
7383 goto out_overflow;
7384 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7385 entry->ino = entry->fattr->mounted_on_fileid;
7386 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7387 entry->ino = entry->fattr->fileid;
7388
7389 entry->d_type = DT_UNKNOWN;
7390 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7391 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7392
7393 return 0;
7394
7395 out_overflow:
7396 print_overflow_msg(__func__, xdr);
7397 return -EAGAIN;
7398 }
7399
7400 /*
7401 * We need to translate between nfs status return values and
7402 * the local errno values which may not be the same.
7403 */
7404 static struct {
7405 int stat;
7406 int errno;
7407 } nfs_errtbl[] = {
7408 { NFS4_OK, 0 },
7409 { NFS4ERR_PERM, -EPERM },
7410 { NFS4ERR_NOENT, -ENOENT },
7411 { NFS4ERR_IO, -errno_NFSERR_IO},
7412 { NFS4ERR_NXIO, -ENXIO },
7413 { NFS4ERR_ACCESS, -EACCES },
7414 { NFS4ERR_EXIST, -EEXIST },
7415 { NFS4ERR_XDEV, -EXDEV },
7416 { NFS4ERR_NOTDIR, -ENOTDIR },
7417 { NFS4ERR_ISDIR, -EISDIR },
7418 { NFS4ERR_INVAL, -EINVAL },
7419 { NFS4ERR_FBIG, -EFBIG },
7420 { NFS4ERR_NOSPC, -ENOSPC },
7421 { NFS4ERR_ROFS, -EROFS },
7422 { NFS4ERR_MLINK, -EMLINK },
7423 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7424 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7425 { NFS4ERR_DQUOT, -EDQUOT },
7426 { NFS4ERR_STALE, -ESTALE },
7427 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7428 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7429 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7430 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7431 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7432 { NFS4ERR_BADTYPE, -EBADTYPE },
7433 { NFS4ERR_LOCKED, -EAGAIN },
7434 { NFS4ERR_SYMLINK, -ELOOP },
7435 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7436 { NFS4ERR_DEADLOCK, -EDEADLK },
7437 { -1, -EIO }
7438 };
7439
7440 /*
7441 * Convert an NFS error code to a local one.
7442 * This one is used jointly by NFSv2 and NFSv3.
7443 */
7444 static int
7445 nfs4_stat_to_errno(int stat)
7446 {
7447 int i;
7448 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7449 if (nfs_errtbl[i].stat == stat)
7450 return nfs_errtbl[i].errno;
7451 }
7452 if (stat <= 10000 || stat > 10100) {
7453 /* The server is looney tunes. */
7454 return -EREMOTEIO;
7455 }
7456 /* If we cannot translate the error, the recovery routines should
7457 * handle it.
7458 * Note: remaining NFSv4 error codes have values > 10000, so should
7459 * not conflict with native Linux error codes.
7460 */
7461 return -stat;
7462 }
7463
7464 #ifdef CONFIG_NFS_V4_2
7465 #include "nfs42xdr.c"
7466 #endif /* CONFIG_NFS_V4_2 */
7467
7468 #define PROC(proc, argtype, restype) \
7469 [NFSPROC4_CLNT_##proc] = { \
7470 .p_proc = NFSPROC4_COMPOUND, \
7471 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7472 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7473 .p_arglen = NFS4_##argtype##_sz, \
7474 .p_replen = NFS4_##restype##_sz, \
7475 .p_statidx = NFSPROC4_CLNT_##proc, \
7476 .p_name = #proc, \
7477 }
7478
7479 #define STUB(proc) \
7480 [NFSPROC4_CLNT_##proc] = { \
7481 .p_name = #proc, \
7482 }
7483
7484 struct rpc_procinfo nfs4_procedures[] = {
7485 PROC(READ, enc_read, dec_read),
7486 PROC(WRITE, enc_write, dec_write),
7487 PROC(COMMIT, enc_commit, dec_commit),
7488 PROC(OPEN, enc_open, dec_open),
7489 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7490 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7491 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7492 PROC(CLOSE, enc_close, dec_close),
7493 PROC(SETATTR, enc_setattr, dec_setattr),
7494 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7495 PROC(RENEW, enc_renew, dec_renew),
7496 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7497 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7498 PROC(LOCK, enc_lock, dec_lock),
7499 PROC(LOCKT, enc_lockt, dec_lockt),
7500 PROC(LOCKU, enc_locku, dec_locku),
7501 PROC(ACCESS, enc_access, dec_access),
7502 PROC(GETATTR, enc_getattr, dec_getattr),
7503 PROC(LOOKUP, enc_lookup, dec_lookup),
7504 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7505 PROC(REMOVE, enc_remove, dec_remove),
7506 PROC(RENAME, enc_rename, dec_rename),
7507 PROC(LINK, enc_link, dec_link),
7508 PROC(SYMLINK, enc_symlink, dec_symlink),
7509 PROC(CREATE, enc_create, dec_create),
7510 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7511 PROC(STATFS, enc_statfs, dec_statfs),
7512 PROC(READLINK, enc_readlink, dec_readlink),
7513 PROC(READDIR, enc_readdir, dec_readdir),
7514 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7515 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7516 PROC(GETACL, enc_getacl, dec_getacl),
7517 PROC(SETACL, enc_setacl, dec_setacl),
7518 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7519 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7520 PROC(SECINFO, enc_secinfo, dec_secinfo),
7521 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7522 #if defined(CONFIG_NFS_V4_1)
7523 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7524 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7525 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7526 PROC(SEQUENCE, enc_sequence, dec_sequence),
7527 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7528 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7529 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7530 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7531 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7532 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7533 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7534 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7535 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7536 STUB(GETDEVICELIST),
7537 PROC(BIND_CONN_TO_SESSION,
7538 enc_bind_conn_to_session, dec_bind_conn_to_session),
7539 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7540 #endif /* CONFIG_NFS_V4_1 */
7541 #ifdef CONFIG_NFS_V4_2
7542 PROC(SEEK, enc_seek, dec_seek),
7543 PROC(ALLOCATE, enc_allocate, dec_allocate),
7544 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7545 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7546 PROC(CLONE, enc_clone, dec_clone),
7547 PROC(COPY, enc_copy, dec_copy),
7548 #endif /* CONFIG_NFS_V4_2 */
7549 };
7550
7551 const struct rpc_version nfs_version4 = {
7552 .number = 4,
7553 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7554 .procs = nfs4_procedures
7555 };
7556
7557 /*
7558 * Local variables:
7559 * c-basic-offset: 8
7560 * End:
7561 */
Linux with added FPC-III support