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staging: refresh TODO for rtl8723au
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob4e4441216804ec550f2c135ef0f393f4f7a1426c
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 p = reserve_space(xdr, 20);
1989 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1990 p = xdr_encode_hyper(p, args->lastbytewritten);
1991 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1992 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1993
1994 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1995 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1996 NFS_I(inode)->layout, xdr, args);
1997 } else {
1998 encode_uint32(xdr, args->layoutupdate_len);
1999 if (args->layoutupdate_pages) {
2000 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2001 args->layoutupdate_len);
2002 }
2003 }
2004
2005 return 0;
2006 }
2007
2008 static void
2009 encode_layoutreturn(struct xdr_stream *xdr,
2010 const struct nfs4_layoutreturn_args *args,
2011 struct compound_hdr *hdr)
2012 {
2013 __be32 *p;
2014
2015 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2016 p = reserve_space(xdr, 16);
2017 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2018 *p++ = cpu_to_be32(args->layout_type);
2019 *p++ = cpu_to_be32(args->range.iomode);
2020 *p = cpu_to_be32(RETURN_FILE);
2021 p = reserve_space(xdr, 16);
2022 p = xdr_encode_hyper(p, args->range.offset);
2023 p = xdr_encode_hyper(p, args->range.length);
2024 spin_lock(&args->inode->i_lock);
2025 encode_nfs4_stateid(xdr, &args->stateid);
2026 spin_unlock(&args->inode->i_lock);
2027 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2028 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2029 NFS_I(args->inode)->layout, xdr, args);
2030 } else
2031 encode_uint32(xdr, 0);
2032 }
2033
2034 static int
2035 encode_secinfo_no_name(struct xdr_stream *xdr,
2036 const struct nfs41_secinfo_no_name_args *args,
2037 struct compound_hdr *hdr)
2038 {
2039 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2040 encode_uint32(xdr, args->style);
2041 return 0;
2042 }
2043
2044 static void encode_test_stateid(struct xdr_stream *xdr,
2045 struct nfs41_test_stateid_args *args,
2046 struct compound_hdr *hdr)
2047 {
2048 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2049 encode_uint32(xdr, 1);
2050 encode_nfs4_stateid(xdr, args->stateid);
2051 }
2052
2053 static void encode_free_stateid(struct xdr_stream *xdr,
2054 struct nfs41_free_stateid_args *args,
2055 struct compound_hdr *hdr)
2056 {
2057 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2058 encode_nfs4_stateid(xdr, &args->stateid);
2059 }
2060 #endif /* CONFIG_NFS_V4_1 */
2061
2062 /*
2063 * END OF "GENERIC" ENCODE ROUTINES.
2064 */
2065
2066 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2067 {
2068 #if defined(CONFIG_NFS_V4_1)
2069 struct nfs4_session *session = args->sa_slot->table->session;
2070 if (session)
2071 return session->clp->cl_mvops->minor_version;
2072 #endif /* CONFIG_NFS_V4_1 */
2073 return 0;
2074 }
2075
2076 /*
2077 * Encode an ACCESS request
2078 */
2079 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2080 const struct nfs4_accessargs *args)
2081 {
2082 struct compound_hdr hdr = {
2083 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2084 };
2085
2086 encode_compound_hdr(xdr, req, &hdr);
2087 encode_sequence(xdr, &args->seq_args, &hdr);
2088 encode_putfh(xdr, args->fh, &hdr);
2089 encode_access(xdr, args->access, &hdr);
2090 encode_getfattr(xdr, args->bitmask, &hdr);
2091 encode_nops(&hdr);
2092 }
2093
2094 /*
2095 * Encode LOOKUP request
2096 */
2097 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2098 const struct nfs4_lookup_arg *args)
2099 {
2100 struct compound_hdr hdr = {
2101 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2102 };
2103
2104 encode_compound_hdr(xdr, req, &hdr);
2105 encode_sequence(xdr, &args->seq_args, &hdr);
2106 encode_putfh(xdr, args->dir_fh, &hdr);
2107 encode_lookup(xdr, args->name, &hdr);
2108 encode_getfh(xdr, &hdr);
2109 encode_getfattr(xdr, args->bitmask, &hdr);
2110 encode_nops(&hdr);
2111 }
2112
2113 /*
2114 * Encode LOOKUP_ROOT request
2115 */
2116 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2117 struct xdr_stream *xdr,
2118 const struct nfs4_lookup_root_arg *args)
2119 {
2120 struct compound_hdr hdr = {
2121 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122 };
2123
2124 encode_compound_hdr(xdr, req, &hdr);
2125 encode_sequence(xdr, &args->seq_args, &hdr);
2126 encode_putrootfh(xdr, &hdr);
2127 encode_getfh(xdr, &hdr);
2128 encode_getfattr(xdr, args->bitmask, &hdr);
2129 encode_nops(&hdr);
2130 }
2131
2132 /*
2133 * Encode REMOVE request
2134 */
2135 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2136 const struct nfs_removeargs *args)
2137 {
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->fh, &hdr);
2145 encode_remove(xdr, &args->name, &hdr);
2146 encode_nops(&hdr);
2147 }
2148
2149 /*
2150 * Encode RENAME request
2151 */
2152 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2153 const struct nfs_renameargs *args)
2154 {
2155 struct compound_hdr hdr = {
2156 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157 };
2158
2159 encode_compound_hdr(xdr, req, &hdr);
2160 encode_sequence(xdr, &args->seq_args, &hdr);
2161 encode_putfh(xdr, args->old_dir, &hdr);
2162 encode_savefh(xdr, &hdr);
2163 encode_putfh(xdr, args->new_dir, &hdr);
2164 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2165 encode_nops(&hdr);
2166 }
2167
2168 /*
2169 * Encode LINK request
2170 */
2171 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2172 const struct nfs4_link_arg *args)
2173 {
2174 struct compound_hdr hdr = {
2175 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176 };
2177
2178 encode_compound_hdr(xdr, req, &hdr);
2179 encode_sequence(xdr, &args->seq_args, &hdr);
2180 encode_putfh(xdr, args->fh, &hdr);
2181 encode_savefh(xdr, &hdr);
2182 encode_putfh(xdr, args->dir_fh, &hdr);
2183 encode_link(xdr, args->name, &hdr);
2184 encode_restorefh(xdr, &hdr);
2185 encode_getfattr(xdr, args->bitmask, &hdr);
2186 encode_nops(&hdr);
2187 }
2188
2189 /*
2190 * Encode CREATE request
2191 */
2192 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2193 const struct nfs4_create_arg *args)
2194 {
2195 struct compound_hdr hdr = {
2196 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197 };
2198
2199 encode_compound_hdr(xdr, req, &hdr);
2200 encode_sequence(xdr, &args->seq_args, &hdr);
2201 encode_putfh(xdr, args->dir_fh, &hdr);
2202 encode_create(xdr, args, &hdr);
2203 encode_getfh(xdr, &hdr);
2204 encode_getfattr(xdr, args->bitmask, &hdr);
2205 encode_nops(&hdr);
2206 }
2207
2208 /*
2209 * Encode SYMLINK request
2210 */
2211 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2212 const struct nfs4_create_arg *args)
2213 {
2214 nfs4_xdr_enc_create(req, xdr, args);
2215 }
2216
2217 /*
2218 * Encode GETATTR request
2219 */
2220 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2221 const struct nfs4_getattr_arg *args)
2222 {
2223 struct compound_hdr hdr = {
2224 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225 };
2226
2227 encode_compound_hdr(xdr, req, &hdr);
2228 encode_sequence(xdr, &args->seq_args, &hdr);
2229 encode_putfh(xdr, args->fh, &hdr);
2230 encode_getfattr(xdr, args->bitmask, &hdr);
2231 encode_nops(&hdr);
2232 }
2233
2234 /*
2235 * Encode a CLOSE request
2236 */
2237 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2238 struct nfs_closeargs *args)
2239 {
2240 struct compound_hdr hdr = {
2241 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2242 };
2243
2244 encode_compound_hdr(xdr, req, &hdr);
2245 encode_sequence(xdr, &args->seq_args, &hdr);
2246 encode_putfh(xdr, args->fh, &hdr);
2247 encode_close(xdr, args, &hdr);
2248 encode_getfattr(xdr, args->bitmask, &hdr);
2249 encode_nops(&hdr);
2250 }
2251
2252 /*
2253 * Encode an OPEN request
2254 */
2255 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2256 struct nfs_openargs *args)
2257 {
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->fh, &hdr);
2265 encode_open(xdr, args, &hdr);
2266 encode_getfh(xdr, &hdr);
2267 if (args->access)
2268 encode_access(xdr, args->access, &hdr);
2269 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2270 encode_nops(&hdr);
2271 }
2272
2273 /*
2274 * Encode an OPEN_CONFIRM request
2275 */
2276 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2277 struct xdr_stream *xdr,
2278 struct nfs_open_confirmargs *args)
2279 {
2280 struct compound_hdr hdr = {
2281 .nops = 0,
2282 };
2283
2284 encode_compound_hdr(xdr, req, &hdr);
2285 encode_putfh(xdr, args->fh, &hdr);
2286 encode_open_confirm(xdr, args, &hdr);
2287 encode_nops(&hdr);
2288 }
2289
2290 /*
2291 * Encode an OPEN request with no attributes.
2292 */
2293 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2294 struct xdr_stream *xdr,
2295 struct nfs_openargs *args)
2296 {
2297 struct compound_hdr hdr = {
2298 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2299 };
2300
2301 encode_compound_hdr(xdr, req, &hdr);
2302 encode_sequence(xdr, &args->seq_args, &hdr);
2303 encode_putfh(xdr, args->fh, &hdr);
2304 encode_open(xdr, args, &hdr);
2305 if (args->access)
2306 encode_access(xdr, args->access, &hdr);
2307 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2308 encode_nops(&hdr);
2309 }
2310
2311 /*
2312 * Encode an OPEN_DOWNGRADE request
2313 */
2314 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2315 struct xdr_stream *xdr,
2316 struct nfs_closeargs *args)
2317 {
2318 struct compound_hdr hdr = {
2319 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320 };
2321
2322 encode_compound_hdr(xdr, req, &hdr);
2323 encode_sequence(xdr, &args->seq_args, &hdr);
2324 encode_putfh(xdr, args->fh, &hdr);
2325 encode_open_downgrade(xdr, args, &hdr);
2326 encode_getfattr(xdr, args->bitmask, &hdr);
2327 encode_nops(&hdr);
2328 }
2329
2330 /*
2331 * Encode a LOCK request
2332 */
2333 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2334 struct nfs_lock_args *args)
2335 {
2336 struct compound_hdr hdr = {
2337 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338 };
2339
2340 encode_compound_hdr(xdr, req, &hdr);
2341 encode_sequence(xdr, &args->seq_args, &hdr);
2342 encode_putfh(xdr, args->fh, &hdr);
2343 encode_lock(xdr, args, &hdr);
2344 encode_nops(&hdr);
2345 }
2346
2347 /*
2348 * Encode a LOCKT request
2349 */
2350 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2351 struct nfs_lockt_args *args)
2352 {
2353 struct compound_hdr hdr = {
2354 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355 };
2356
2357 encode_compound_hdr(xdr, req, &hdr);
2358 encode_sequence(xdr, &args->seq_args, &hdr);
2359 encode_putfh(xdr, args->fh, &hdr);
2360 encode_lockt(xdr, args, &hdr);
2361 encode_nops(&hdr);
2362 }
2363
2364 /*
2365 * Encode a LOCKU request
2366 */
2367 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2368 struct nfs_locku_args *args)
2369 {
2370 struct compound_hdr hdr = {
2371 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372 };
2373
2374 encode_compound_hdr(xdr, req, &hdr);
2375 encode_sequence(xdr, &args->seq_args, &hdr);
2376 encode_putfh(xdr, args->fh, &hdr);
2377 encode_locku(xdr, args, &hdr);
2378 encode_nops(&hdr);
2379 }
2380
2381 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2382 struct xdr_stream *xdr,
2383 struct nfs_release_lockowner_args *args)
2384 {
2385 struct compound_hdr hdr = {
2386 .minorversion = 0,
2387 };
2388
2389 encode_compound_hdr(xdr, req, &hdr);
2390 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2391 encode_nops(&hdr);
2392 }
2393
2394 /*
2395 * Encode a READLINK request
2396 */
2397 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2398 const struct nfs4_readlink *args)
2399 {
2400 struct compound_hdr hdr = {
2401 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402 };
2403
2404 encode_compound_hdr(xdr, req, &hdr);
2405 encode_sequence(xdr, &args->seq_args, &hdr);
2406 encode_putfh(xdr, args->fh, &hdr);
2407 encode_readlink(xdr, args, req, &hdr);
2408
2409 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2410 args->pgbase, args->pglen);
2411 encode_nops(&hdr);
2412 }
2413
2414 /*
2415 * Encode a READDIR request
2416 */
2417 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2418 const struct nfs4_readdir_arg *args)
2419 {
2420 struct compound_hdr hdr = {
2421 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2422 };
2423
2424 encode_compound_hdr(xdr, req, &hdr);
2425 encode_sequence(xdr, &args->seq_args, &hdr);
2426 encode_putfh(xdr, args->fh, &hdr);
2427 encode_readdir(xdr, args, req, &hdr);
2428
2429 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2430 args->pgbase, args->count);
2431 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2432 __func__, hdr.replen << 2, args->pages,
2433 args->pgbase, args->count);
2434 encode_nops(&hdr);
2435 }
2436
2437 /*
2438 * Encode a READ request
2439 */
2440 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2441 struct nfs_pgio_args *args)
2442 {
2443 struct compound_hdr hdr = {
2444 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445 };
2446
2447 encode_compound_hdr(xdr, req, &hdr);
2448 encode_sequence(xdr, &args->seq_args, &hdr);
2449 encode_putfh(xdr, args->fh, &hdr);
2450 encode_read(xdr, args, &hdr);
2451
2452 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2453 args->pages, args->pgbase, args->count);
2454 req->rq_rcv_buf.flags |= XDRBUF_READ;
2455 encode_nops(&hdr);
2456 }
2457
2458 /*
2459 * Encode an SETATTR request
2460 */
2461 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2462 struct nfs_setattrargs *args)
2463 {
2464 struct compound_hdr hdr = {
2465 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466 };
2467
2468 encode_compound_hdr(xdr, req, &hdr);
2469 encode_sequence(xdr, &args->seq_args, &hdr);
2470 encode_putfh(xdr, args->fh, &hdr);
2471 encode_setattr(xdr, args, args->server, &hdr);
2472 encode_getfattr(xdr, args->bitmask, &hdr);
2473 encode_nops(&hdr);
2474 }
2475
2476 /*
2477 * Encode a GETACL request
2478 */
2479 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2480 struct nfs_getaclargs *args)
2481 {
2482 struct compound_hdr hdr = {
2483 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2484 };
2485 uint32_t replen;
2486
2487 encode_compound_hdr(xdr, req, &hdr);
2488 encode_sequence(xdr, &args->seq_args, &hdr);
2489 encode_putfh(xdr, args->fh, &hdr);
2490 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2491 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2492
2493 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2494 args->acl_pages, 0, args->acl_len);
2495
2496 encode_nops(&hdr);
2497 }
2498
2499 /*
2500 * Encode a WRITE request
2501 */
2502 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2503 struct nfs_pgio_args *args)
2504 {
2505 struct compound_hdr hdr = {
2506 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507 };
2508
2509 encode_compound_hdr(xdr, req, &hdr);
2510 encode_sequence(xdr, &args->seq_args, &hdr);
2511 encode_putfh(xdr, args->fh, &hdr);
2512 encode_write(xdr, args, &hdr);
2513 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2514 if (args->bitmask)
2515 encode_getfattr(xdr, args->bitmask, &hdr);
2516 encode_nops(&hdr);
2517 }
2518
2519 /*
2520 * a COMMIT request
2521 */
2522 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2523 struct nfs_commitargs *args)
2524 {
2525 struct compound_hdr hdr = {
2526 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527 };
2528
2529 encode_compound_hdr(xdr, req, &hdr);
2530 encode_sequence(xdr, &args->seq_args, &hdr);
2531 encode_putfh(xdr, args->fh, &hdr);
2532 encode_commit(xdr, args, &hdr);
2533 encode_nops(&hdr);
2534 }
2535
2536 /*
2537 * FSINFO request
2538 */
2539 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 struct nfs4_fsinfo_arg *args)
2541 {
2542 struct compound_hdr hdr = {
2543 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544 };
2545
2546 encode_compound_hdr(xdr, req, &hdr);
2547 encode_sequence(xdr, &args->seq_args, &hdr);
2548 encode_putfh(xdr, args->fh, &hdr);
2549 encode_fsinfo(xdr, args->bitmask, &hdr);
2550 encode_nops(&hdr);
2551 }
2552
2553 /*
2554 * a PATHCONF request
2555 */
2556 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2557 const struct nfs4_pathconf_arg *args)
2558 {
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562
2563 encode_compound_hdr(xdr, req, &hdr);
2564 encode_sequence(xdr, &args->seq_args, &hdr);
2565 encode_putfh(xdr, args->fh, &hdr);
2566 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2567 &hdr);
2568 encode_nops(&hdr);
2569 }
2570
2571 /*
2572 * a STATFS request
2573 */
2574 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 const struct nfs4_statfs_arg *args)
2576 {
2577 struct compound_hdr hdr = {
2578 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2579 };
2580
2581 encode_compound_hdr(xdr, req, &hdr);
2582 encode_sequence(xdr, &args->seq_args, &hdr);
2583 encode_putfh(xdr, args->fh, &hdr);
2584 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2585 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2586 encode_nops(&hdr);
2587 }
2588
2589 /*
2590 * GETATTR_BITMAP request
2591 */
2592 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2593 struct xdr_stream *xdr,
2594 struct nfs4_server_caps_arg *args)
2595 {
2596 const u32 *bitmask = args->bitmask;
2597 struct compound_hdr hdr = {
2598 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2599 };
2600
2601 encode_compound_hdr(xdr, req, &hdr);
2602 encode_sequence(xdr, &args->seq_args, &hdr);
2603 encode_putfh(xdr, args->fhandle, &hdr);
2604 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2605 encode_nops(&hdr);
2606 }
2607
2608 /*
2609 * a RENEW request
2610 */
2611 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2612 struct nfs_client *clp)
2613 {
2614 struct compound_hdr hdr = {
2615 .nops = 0,
2616 };
2617
2618 encode_compound_hdr(xdr, req, &hdr);
2619 encode_renew(xdr, clp->cl_clientid, &hdr);
2620 encode_nops(&hdr);
2621 }
2622
2623 /*
2624 * a SETCLIENTID request
2625 */
2626 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2627 struct xdr_stream *xdr,
2628 struct nfs4_setclientid *sc)
2629 {
2630 struct compound_hdr hdr = {
2631 .nops = 0,
2632 };
2633
2634 encode_compound_hdr(xdr, req, &hdr);
2635 encode_setclientid(xdr, sc, &hdr);
2636 encode_nops(&hdr);
2637 }
2638
2639 /*
2640 * a SETCLIENTID_CONFIRM request
2641 */
2642 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2643 struct xdr_stream *xdr,
2644 struct nfs4_setclientid_res *arg)
2645 {
2646 struct compound_hdr hdr = {
2647 .nops = 0,
2648 };
2649
2650 encode_compound_hdr(xdr, req, &hdr);
2651 encode_setclientid_confirm(xdr, arg, &hdr);
2652 encode_nops(&hdr);
2653 }
2654
2655 /*
2656 * DELEGRETURN request
2657 */
2658 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2659 struct xdr_stream *xdr,
2660 const struct nfs4_delegreturnargs *args)
2661 {
2662 struct compound_hdr hdr = {
2663 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664 };
2665
2666 encode_compound_hdr(xdr, req, &hdr);
2667 encode_sequence(xdr, &args->seq_args, &hdr);
2668 encode_putfh(xdr, args->fhandle, &hdr);
2669 encode_getfattr(xdr, args->bitmask, &hdr);
2670 encode_delegreturn(xdr, args->stateid, &hdr);
2671 encode_nops(&hdr);
2672 }
2673
2674 /*
2675 * Encode FS_LOCATIONS request
2676 */
2677 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2678 struct xdr_stream *xdr,
2679 struct nfs4_fs_locations_arg *args)
2680 {
2681 struct compound_hdr hdr = {
2682 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683 };
2684 uint32_t replen;
2685
2686 encode_compound_hdr(xdr, req, &hdr);
2687 encode_sequence(xdr, &args->seq_args, &hdr);
2688 if (args->migration) {
2689 encode_putfh(xdr, args->fh, &hdr);
2690 replen = hdr.replen;
2691 encode_fs_locations(xdr, args->bitmask, &hdr);
2692 if (args->renew)
2693 encode_renew(xdr, args->clientid, &hdr);
2694 } else {
2695 encode_putfh(xdr, args->dir_fh, &hdr);
2696 encode_lookup(xdr, args->name, &hdr);
2697 replen = hdr.replen;
2698 encode_fs_locations(xdr, args->bitmask, &hdr);
2699 }
2700
2701 /* Set up reply kvec to capture returned fs_locations array. */
2702 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2703 0, PAGE_SIZE);
2704 encode_nops(&hdr);
2705 }
2706
2707 /*
2708 * Encode SECINFO request
2709 */
2710 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2711 struct xdr_stream *xdr,
2712 struct nfs4_secinfo_arg *args)
2713 {
2714 struct compound_hdr hdr = {
2715 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716 };
2717
2718 encode_compound_hdr(xdr, req, &hdr);
2719 encode_sequence(xdr, &args->seq_args, &hdr);
2720 encode_putfh(xdr, args->dir_fh, &hdr);
2721 encode_secinfo(xdr, args->name, &hdr);
2722 encode_nops(&hdr);
2723 }
2724
2725 /*
2726 * Encode FSID_PRESENT request
2727 */
2728 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 struct nfs4_fsid_present_arg *args)
2731 {
2732 struct compound_hdr hdr = {
2733 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734 };
2735
2736 encode_compound_hdr(xdr, req, &hdr);
2737 encode_sequence(xdr, &args->seq_args, &hdr);
2738 encode_putfh(xdr, args->fh, &hdr);
2739 encode_getfh(xdr, &hdr);
2740 if (args->renew)
2741 encode_renew(xdr, args->clientid, &hdr);
2742 encode_nops(&hdr);
2743 }
2744
2745 #if defined(CONFIG_NFS_V4_1)
2746 /*
2747 * BIND_CONN_TO_SESSION request
2748 */
2749 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2750 struct xdr_stream *xdr,
2751 struct nfs41_bind_conn_to_session_args *args)
2752 {
2753 struct compound_hdr hdr = {
2754 .minorversion = args->client->cl_mvops->minor_version,
2755 };
2756
2757 encode_compound_hdr(xdr, req, &hdr);
2758 encode_bind_conn_to_session(xdr, args, &hdr);
2759 encode_nops(&hdr);
2760 }
2761
2762 /*
2763 * EXCHANGE_ID request
2764 */
2765 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2766 struct xdr_stream *xdr,
2767 struct nfs41_exchange_id_args *args)
2768 {
2769 struct compound_hdr hdr = {
2770 .minorversion = args->client->cl_mvops->minor_version,
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_exchange_id(xdr, args, &hdr);
2775 encode_nops(&hdr);
2776 }
2777
2778 /*
2779 * a CREATE_SESSION request
2780 */
2781 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2782 struct xdr_stream *xdr,
2783 struct nfs41_create_session_args *args)
2784 {
2785 struct compound_hdr hdr = {
2786 .minorversion = args->client->cl_mvops->minor_version,
2787 };
2788
2789 encode_compound_hdr(xdr, req, &hdr);
2790 encode_create_session(xdr, args, &hdr);
2791 encode_nops(&hdr);
2792 }
2793
2794 /*
2795 * a DESTROY_SESSION request
2796 */
2797 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2798 struct xdr_stream *xdr,
2799 struct nfs4_session *session)
2800 {
2801 struct compound_hdr hdr = {
2802 .minorversion = session->clp->cl_mvops->minor_version,
2803 };
2804
2805 encode_compound_hdr(xdr, req, &hdr);
2806 encode_destroy_session(xdr, session, &hdr);
2807 encode_nops(&hdr);
2808 }
2809
2810 /*
2811 * a DESTROY_CLIENTID request
2812 */
2813 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2814 struct xdr_stream *xdr,
2815 struct nfs_client *clp)
2816 {
2817 struct compound_hdr hdr = {
2818 .minorversion = clp->cl_mvops->minor_version,
2819 };
2820
2821 encode_compound_hdr(xdr, req, &hdr);
2822 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2823 encode_nops(&hdr);
2824 }
2825
2826 /*
2827 * a SEQUENCE request
2828 */
2829 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2830 struct nfs4_sequence_args *args)
2831 {
2832 struct compound_hdr hdr = {
2833 .minorversion = nfs4_xdr_minorversion(args),
2834 };
2835
2836 encode_compound_hdr(xdr, req, &hdr);
2837 encode_sequence(xdr, args, &hdr);
2838 encode_nops(&hdr);
2839 }
2840
2841 /*
2842 * a GET_LEASE_TIME request
2843 */
2844 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2845 struct xdr_stream *xdr,
2846 struct nfs4_get_lease_time_args *args)
2847 {
2848 struct compound_hdr hdr = {
2849 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2850 };
2851 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2852
2853 encode_compound_hdr(xdr, req, &hdr);
2854 encode_sequence(xdr, &args->la_seq_args, &hdr);
2855 encode_putrootfh(xdr, &hdr);
2856 encode_fsinfo(xdr, lease_bitmap, &hdr);
2857 encode_nops(&hdr);
2858 }
2859
2860 /*
2861 * a RECLAIM_COMPLETE request
2862 */
2863 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2864 struct xdr_stream *xdr,
2865 struct nfs41_reclaim_complete_args *args)
2866 {
2867 struct compound_hdr hdr = {
2868 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2869 };
2870
2871 encode_compound_hdr(xdr, req, &hdr);
2872 encode_sequence(xdr, &args->seq_args, &hdr);
2873 encode_reclaim_complete(xdr, args, &hdr);
2874 encode_nops(&hdr);
2875 }
2876
2877 /*
2878 * Encode GETDEVICEINFO request
2879 */
2880 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2881 struct xdr_stream *xdr,
2882 struct nfs4_getdeviceinfo_args *args)
2883 {
2884 struct compound_hdr hdr = {
2885 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2886 };
2887
2888 encode_compound_hdr(xdr, req, &hdr);
2889 encode_sequence(xdr, &args->seq_args, &hdr);
2890 encode_getdeviceinfo(xdr, args, &hdr);
2891
2892 /* set up reply kvec. Subtract notification bitmap max size (2)
2893 * so that notification bitmap is put in xdr_buf tail */
2894 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2895 args->pdev->pages, args->pdev->pgbase,
2896 args->pdev->pglen);
2897
2898 encode_nops(&hdr);
2899 }
2900
2901 /*
2902 * Encode LAYOUTGET request
2903 */
2904 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2905 struct xdr_stream *xdr,
2906 struct nfs4_layoutget_args *args)
2907 {
2908 struct compound_hdr hdr = {
2909 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910 };
2911
2912 encode_compound_hdr(xdr, req, &hdr);
2913 encode_sequence(xdr, &args->seq_args, &hdr);
2914 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2915 encode_layoutget(xdr, args, &hdr);
2916
2917 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2918 args->layout.pages, 0, args->layout.pglen);
2919
2920 encode_nops(&hdr);
2921 }
2922
2923 /*
2924 * Encode LAYOUTCOMMIT request
2925 */
2926 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2927 struct xdr_stream *xdr,
2928 struct nfs4_layoutcommit_args *args)
2929 {
2930 struct nfs4_layoutcommit_data *data =
2931 container_of(args, struct nfs4_layoutcommit_data, args);
2932 struct compound_hdr hdr = {
2933 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934 };
2935
2936 encode_compound_hdr(xdr, req, &hdr);
2937 encode_sequence(xdr, &args->seq_args, &hdr);
2938 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2940 encode_getfattr(xdr, args->bitmask, &hdr);
2941 encode_nops(&hdr);
2942 }
2943
2944 /*
2945 * Encode LAYOUTRETURN request
2946 */
2947 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2948 struct xdr_stream *xdr,
2949 struct nfs4_layoutreturn_args *args)
2950 {
2951 struct compound_hdr hdr = {
2952 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2953 };
2954
2955 encode_compound_hdr(xdr, req, &hdr);
2956 encode_sequence(xdr, &args->seq_args, &hdr);
2957 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2958 encode_layoutreturn(xdr, args, &hdr);
2959 encode_nops(&hdr);
2960 }
2961
2962 /*
2963 * Encode SECINFO_NO_NAME request
2964 */
2965 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2966 struct xdr_stream *xdr,
2967 struct nfs41_secinfo_no_name_args *args)
2968 {
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971 };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->seq_args, &hdr);
2975 encode_putrootfh(xdr, &hdr);
2976 encode_secinfo_no_name(xdr, args, &hdr);
2977 encode_nops(&hdr);
2978 return 0;
2979 }
2980
2981 /*
2982 * Encode TEST_STATEID request
2983 */
2984 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2985 struct xdr_stream *xdr,
2986 struct nfs41_test_stateid_args *args)
2987 {
2988 struct compound_hdr hdr = {
2989 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2990 };
2991
2992 encode_compound_hdr(xdr, req, &hdr);
2993 encode_sequence(xdr, &args->seq_args, &hdr);
2994 encode_test_stateid(xdr, args, &hdr);
2995 encode_nops(&hdr);
2996 }
2997
2998 /*
2999 * Encode FREE_STATEID request
3000 */
3001 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3002 struct xdr_stream *xdr,
3003 struct nfs41_free_stateid_args *args)
3004 {
3005 struct compound_hdr hdr = {
3006 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007 };
3008
3009 encode_compound_hdr(xdr, req, &hdr);
3010 encode_sequence(xdr, &args->seq_args, &hdr);
3011 encode_free_stateid(xdr, args, &hdr);
3012 encode_nops(&hdr);
3013 }
3014 #endif /* CONFIG_NFS_V4_1 */
3015
3016 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3017 {
3018 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3019 "Remaining buffer length is %tu words.\n",
3020 func, xdr->end - xdr->p);
3021 }
3022
3023 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3024 {
3025 __be32 *p;
3026
3027 p = xdr_inline_decode(xdr, 4);
3028 if (unlikely(!p))
3029 goto out_overflow;
3030 *len = be32_to_cpup(p);
3031 p = xdr_inline_decode(xdr, *len);
3032 if (unlikely(!p))
3033 goto out_overflow;
3034 *string = (char *)p;
3035 return 0;
3036 out_overflow:
3037 print_overflow_msg(__func__, xdr);
3038 return -EIO;
3039 }
3040
3041 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3042 {
3043 __be32 *p;
3044
3045 p = xdr_inline_decode(xdr, 8);
3046 if (unlikely(!p))
3047 goto out_overflow;
3048 hdr->status = be32_to_cpup(p++);
3049 hdr->taglen = be32_to_cpup(p);
3050
3051 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3052 if (unlikely(!p))
3053 goto out_overflow;
3054 hdr->tag = (char *)p;
3055 p += XDR_QUADLEN(hdr->taglen);
3056 hdr->nops = be32_to_cpup(p);
3057 if (unlikely(hdr->nops < 1))
3058 return nfs4_stat_to_errno(hdr->status);
3059 return 0;
3060 out_overflow:
3061 print_overflow_msg(__func__, xdr);
3062 return -EIO;
3063 }
3064
3065 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3066 int *nfs_retval)
3067 {
3068 __be32 *p;
3069 uint32_t opnum;
3070 int32_t nfserr;
3071
3072 p = xdr_inline_decode(xdr, 8);
3073 if (unlikely(!p))
3074 goto out_overflow;
3075 opnum = be32_to_cpup(p++);
3076 if (unlikely(opnum != expected))
3077 goto out_bad_operation;
3078 nfserr = be32_to_cpup(p);
3079 if (nfserr == NFS_OK)
3080 *nfs_retval = 0;
3081 else
3082 *nfs_retval = nfs4_stat_to_errno(nfserr);
3083 return true;
3084 out_bad_operation:
3085 dprintk("nfs: Server returned operation"
3086 " %d but we issued a request for %d\n",
3087 opnum, expected);
3088 *nfs_retval = -EREMOTEIO;
3089 return false;
3090 out_overflow:
3091 print_overflow_msg(__func__, xdr);
3092 *nfs_retval = -EIO;
3093 return false;
3094 }
3095
3096 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3097 {
3098 int retval;
3099
3100 __decode_op_hdr(xdr, expected, &retval);
3101 return retval;
3102 }
3103
3104 /* Dummy routine */
3105 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3106 {
3107 __be32 *p;
3108 unsigned int strlen;
3109 char *str;
3110
3111 p = xdr_inline_decode(xdr, 12);
3112 if (likely(p))
3113 return decode_opaque_inline(xdr, &strlen, &str);
3114 print_overflow_msg(__func__, xdr);
3115 return -EIO;
3116 }
3117
3118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3119 {
3120 uint32_t bmlen;
3121 __be32 *p;
3122
3123 p = xdr_inline_decode(xdr, 4);
3124 if (unlikely(!p))
3125 goto out_overflow;
3126 bmlen = be32_to_cpup(p);
3127
3128 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3129 p = xdr_inline_decode(xdr, (bmlen << 2));
3130 if (unlikely(!p))
3131 goto out_overflow;
3132 if (bmlen > 0) {
3133 bitmap[0] = be32_to_cpup(p++);
3134 if (bmlen > 1) {
3135 bitmap[1] = be32_to_cpup(p++);
3136 if (bmlen > 2)
3137 bitmap[2] = be32_to_cpup(p);
3138 }
3139 }
3140 return 0;
3141 out_overflow:
3142 print_overflow_msg(__func__, xdr);
3143 return -EIO;
3144 }
3145
3146 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3147 {
3148 __be32 *p;
3149
3150 p = xdr_inline_decode(xdr, 4);
3151 if (unlikely(!p))
3152 goto out_overflow;
3153 *attrlen = be32_to_cpup(p);
3154 *savep = xdr_stream_pos(xdr);
3155 return 0;
3156 out_overflow:
3157 print_overflow_msg(__func__, xdr);
3158 return -EIO;
3159 }
3160
3161 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3162 {
3163 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3164 int ret;
3165 ret = decode_attr_bitmap(xdr, bitmask);
3166 if (unlikely(ret < 0))
3167 return ret;
3168 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3169 } else
3170 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3171 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3172 bitmask[0], bitmask[1], bitmask[2]);
3173 return 0;
3174 }
3175
3176 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3177 {
3178 __be32 *p;
3179 int ret = 0;
3180
3181 *type = 0;
3182 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3183 return -EIO;
3184 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3185 p = xdr_inline_decode(xdr, 4);
3186 if (unlikely(!p))
3187 goto out_overflow;
3188 *type = be32_to_cpup(p);
3189 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3190 dprintk("%s: bad type %d\n", __func__, *type);
3191 return -EIO;
3192 }
3193 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3194 ret = NFS_ATTR_FATTR_TYPE;
3195 }
3196 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3197 return ret;
3198 out_overflow:
3199 print_overflow_msg(__func__, xdr);
3200 return -EIO;
3201 }
3202
3203 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3204 uint32_t *bitmap, uint32_t *type)
3205 {
3206 __be32 *p;
3207
3208 *type = 0;
3209 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3210 return -EIO;
3211 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3212 p = xdr_inline_decode(xdr, 4);
3213 if (unlikely(!p))
3214 goto out_overflow;
3215 *type = be32_to_cpup(p);
3216 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3217 }
3218 dprintk("%s: expire type=0x%x\n", __func__, *type);
3219 return 0;
3220 out_overflow:
3221 print_overflow_msg(__func__, xdr);
3222 return -EIO;
3223 }
3224
3225 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3226 {
3227 __be32 *p;
3228 int ret = 0;
3229
3230 *change = 0;
3231 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3232 return -EIO;
3233 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3234 p = xdr_inline_decode(xdr, 8);
3235 if (unlikely(!p))
3236 goto out_overflow;
3237 xdr_decode_hyper(p, change);
3238 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3239 ret = NFS_ATTR_FATTR_CHANGE;
3240 }
3241 dprintk("%s: change attribute=%Lu\n", __func__,
3242 (unsigned long long)*change);
3243 return ret;
3244 out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247 }
3248
3249 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3250 {
3251 __be32 *p;
3252 int ret = 0;
3253
3254 *size = 0;
3255 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3256 return -EIO;
3257 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3258 p = xdr_inline_decode(xdr, 8);
3259 if (unlikely(!p))
3260 goto out_overflow;
3261 xdr_decode_hyper(p, size);
3262 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3263 ret = NFS_ATTR_FATTR_SIZE;
3264 }
3265 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3266 return ret;
3267 out_overflow:
3268 print_overflow_msg(__func__, xdr);
3269 return -EIO;
3270 }
3271
3272 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3273 {
3274 __be32 *p;
3275
3276 *res = 0;
3277 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3278 return -EIO;
3279 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3280 p = xdr_inline_decode(xdr, 4);
3281 if (unlikely(!p))
3282 goto out_overflow;
3283 *res = be32_to_cpup(p);
3284 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3285 }
3286 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3287 return 0;
3288 out_overflow:
3289 print_overflow_msg(__func__, xdr);
3290 return -EIO;
3291 }
3292
3293 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294 {
3295 __be32 *p;
3296
3297 *res = 0;
3298 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3299 return -EIO;
3300 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3301 p = xdr_inline_decode(xdr, 4);
3302 if (unlikely(!p))
3303 goto out_overflow;
3304 *res = be32_to_cpup(p);
3305 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3306 }
3307 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3308 return 0;
3309 out_overflow:
3310 print_overflow_msg(__func__, xdr);
3311 return -EIO;
3312 }
3313
3314 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3315 {
3316 __be32 *p;
3317 int ret = 0;
3318
3319 fsid->major = 0;
3320 fsid->minor = 0;
3321 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3322 return -EIO;
3323 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3324 p = xdr_inline_decode(xdr, 16);
3325 if (unlikely(!p))
3326 goto out_overflow;
3327 p = xdr_decode_hyper(p, &fsid->major);
3328 xdr_decode_hyper(p, &fsid->minor);
3329 bitmap[0] &= ~FATTR4_WORD0_FSID;
3330 ret = NFS_ATTR_FATTR_FSID;
3331 }
3332 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3333 (unsigned long long)fsid->major,
3334 (unsigned long long)fsid->minor);
3335 return ret;
3336 out_overflow:
3337 print_overflow_msg(__func__, xdr);
3338 return -EIO;
3339 }
3340
3341 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3342 {
3343 __be32 *p;
3344
3345 *res = 60;
3346 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3347 return -EIO;
3348 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3349 p = xdr_inline_decode(xdr, 4);
3350 if (unlikely(!p))
3351 goto out_overflow;
3352 *res = be32_to_cpup(p);
3353 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3354 }
3355 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3356 return 0;
3357 out_overflow:
3358 print_overflow_msg(__func__, xdr);
3359 return -EIO;
3360 }
3361
3362 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3363 {
3364 __be32 *p;
3365
3366 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3367 return -EIO;
3368 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3369 p = xdr_inline_decode(xdr, 4);
3370 if (unlikely(!p))
3371 goto out_overflow;
3372 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3373 *res = -be32_to_cpup(p);
3374 }
3375 return 0;
3376 out_overflow:
3377 print_overflow_msg(__func__, xdr);
3378 return -EIO;
3379 }
3380
3381 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3382 uint32_t *bitmap, uint32_t *bitmask)
3383 {
3384 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3385 int ret;
3386 ret = decode_attr_bitmap(xdr, bitmask);
3387 if (unlikely(ret < 0))
3388 return ret;
3389 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3390 } else
3391 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3392 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3393 bitmask[0], bitmask[1], bitmask[2]);
3394 return 0;
3395 }
3396
3397 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3398 {
3399 __be32 *p;
3400 int len;
3401
3402 if (fh != NULL)
3403 memset(fh, 0, sizeof(*fh));
3404
3405 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3406 return -EIO;
3407 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3408 p = xdr_inline_decode(xdr, 4);
3409 if (unlikely(!p))
3410 goto out_overflow;
3411 len = be32_to_cpup(p);
3412 if (len > NFS4_FHSIZE)
3413 return -EIO;
3414 p = xdr_inline_decode(xdr, len);
3415 if (unlikely(!p))
3416 goto out_overflow;
3417 if (fh != NULL) {
3418 memcpy(fh->data, p, len);
3419 fh->size = len;
3420 }
3421 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3422 }
3423 return 0;
3424 out_overflow:
3425 print_overflow_msg(__func__, xdr);
3426 return -EIO;
3427 }
3428
3429 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3430 {
3431 __be32 *p;
3432
3433 *res = 0;
3434 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3435 return -EIO;
3436 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3437 p = xdr_inline_decode(xdr, 4);
3438 if (unlikely(!p))
3439 goto out_overflow;
3440 *res = be32_to_cpup(p);
3441 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3442 }
3443 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3444 return 0;
3445 out_overflow:
3446 print_overflow_msg(__func__, xdr);
3447 return -EIO;
3448 }
3449
3450 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3451 {
3452 __be32 *p;
3453 int ret = 0;
3454
3455 *fileid = 0;
3456 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3457 return -EIO;
3458 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3459 p = xdr_inline_decode(xdr, 8);
3460 if (unlikely(!p))
3461 goto out_overflow;
3462 xdr_decode_hyper(p, fileid);
3463 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3464 ret = NFS_ATTR_FATTR_FILEID;
3465 }
3466 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3467 return ret;
3468 out_overflow:
3469 print_overflow_msg(__func__, xdr);
3470 return -EIO;
3471 }
3472
3473 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3474 {
3475 __be32 *p;
3476 int ret = 0;
3477
3478 *fileid = 0;
3479 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3480 return -EIO;
3481 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3482 p = xdr_inline_decode(xdr, 8);
3483 if (unlikely(!p))
3484 goto out_overflow;
3485 xdr_decode_hyper(p, fileid);
3486 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3487 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3488 }
3489 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3490 return ret;
3491 out_overflow:
3492 print_overflow_msg(__func__, xdr);
3493 return -EIO;
3494 }
3495
3496 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3497 {
3498 __be32 *p;
3499 int status = 0;
3500
3501 *res = 0;
3502 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3503 return -EIO;
3504 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3505 p = xdr_inline_decode(xdr, 8);
3506 if (unlikely(!p))
3507 goto out_overflow;
3508 xdr_decode_hyper(p, res);
3509 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3510 }
3511 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3512 return status;
3513 out_overflow:
3514 print_overflow_msg(__func__, xdr);
3515 return -EIO;
3516 }
3517
3518 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3519 {
3520 __be32 *p;
3521 int status = 0;
3522
3523 *res = 0;
3524 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3525 return -EIO;
3526 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3527 p = xdr_inline_decode(xdr, 8);
3528 if (unlikely(!p))
3529 goto out_overflow;
3530 xdr_decode_hyper(p, res);
3531 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3532 }
3533 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3534 return status;
3535 out_overflow:
3536 print_overflow_msg(__func__, xdr);
3537 return -EIO;
3538 }
3539
3540 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3541 {
3542 __be32 *p;
3543 int status = 0;
3544
3545 *res = 0;
3546 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3547 return -EIO;
3548 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3549 p = xdr_inline_decode(xdr, 8);
3550 if (unlikely(!p))
3551 goto out_overflow;
3552 xdr_decode_hyper(p, res);
3553 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3554 }
3555 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3556 return status;
3557 out_overflow:
3558 print_overflow_msg(__func__, xdr);
3559 return -EIO;
3560 }
3561
3562 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3563 {
3564 u32 n;
3565 __be32 *p;
3566 int status = 0;
3567
3568 p = xdr_inline_decode(xdr, 4);
3569 if (unlikely(!p))
3570 goto out_overflow;
3571 n = be32_to_cpup(p);
3572 if (n == 0)
3573 goto root_path;
3574 dprintk("pathname4: ");
3575 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3576 dprintk("cannot parse %d components in path\n", n);
3577 goto out_eio;
3578 }
3579 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3580 struct nfs4_string *component = &path->components[path->ncomponents];
3581 status = decode_opaque_inline(xdr, &component->len, &component->data);
3582 if (unlikely(status != 0))
3583 goto out_eio;
3584 ifdebug (XDR)
3585 pr_cont("%s%.*s ",
3586 (path->ncomponents != n ? "/ " : ""),
3587 component->len, component->data);
3588 }
3589 out:
3590 return status;
3591 root_path:
3592 /* a root pathname is sent as a zero component4 */
3593 path->ncomponents = 1;
3594 path->components[0].len=0;
3595 path->components[0].data=NULL;
3596 dprintk("pathname4: /\n");
3597 goto out;
3598 out_eio:
3599 dprintk(" status %d", status);
3600 status = -EIO;
3601 goto out;
3602 out_overflow:
3603 print_overflow_msg(__func__, xdr);
3604 return -EIO;
3605 }
3606
3607 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3608 {
3609 int n;
3610 __be32 *p;
3611 int status = -EIO;
3612
3613 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3614 goto out;
3615 status = 0;
3616 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3617 goto out;
3618 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3619 status = -EIO;
3620 /* Ignore borken servers that return unrequested attrs */
3621 if (unlikely(res == NULL))
3622 goto out;
3623 dprintk("%s: fsroot:\n", __func__);
3624 status = decode_pathname(xdr, &res->fs_path);
3625 if (unlikely(status != 0))
3626 goto out;
3627 p = xdr_inline_decode(xdr, 4);
3628 if (unlikely(!p))
3629 goto out_overflow;
3630 n = be32_to_cpup(p);
3631 if (n <= 0)
3632 goto out_eio;
3633 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3634 u32 m;
3635 struct nfs4_fs_location *loc;
3636
3637 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3638 break;
3639 loc = &res->locations[res->nlocations];
3640 p = xdr_inline_decode(xdr, 4);
3641 if (unlikely(!p))
3642 goto out_overflow;
3643 m = be32_to_cpup(p);
3644
3645 dprintk("%s: servers:\n", __func__);
3646 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3647 struct nfs4_string *server;
3648
3649 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3650 unsigned int i;
3651 dprintk("%s: using first %u of %u servers "
3652 "returned for location %u\n",
3653 __func__,
3654 NFS4_FS_LOCATION_MAXSERVERS,
3655 m, res->nlocations);
3656 for (i = loc->nservers; i < m; i++) {
3657 unsigned int len;
3658 char *data;
3659 status = decode_opaque_inline(xdr, &len, &data);
3660 if (unlikely(status != 0))
3661 goto out_eio;
3662 }
3663 break;
3664 }
3665 server = &loc->servers[loc->nservers];
3666 status = decode_opaque_inline(xdr, &server->len, &server->data);
3667 if (unlikely(status != 0))
3668 goto out_eio;
3669 dprintk("%s ", server->data);
3670 }
3671 status = decode_pathname(xdr, &loc->rootpath);
3672 if (unlikely(status != 0))
3673 goto out_eio;
3674 }
3675 if (res->nlocations != 0)
3676 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3677 out:
3678 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3679 return status;
3680 out_overflow:
3681 print_overflow_msg(__func__, xdr);
3682 out_eio:
3683 status = -EIO;
3684 goto out;
3685 }
3686
3687 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3688 {
3689 __be32 *p;
3690 int status = 0;
3691
3692 *res = 0;
3693 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3694 return -EIO;
3695 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3696 p = xdr_inline_decode(xdr, 8);
3697 if (unlikely(!p))
3698 goto out_overflow;
3699 xdr_decode_hyper(p, res);
3700 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3701 }
3702 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3703 return status;
3704 out_overflow:
3705 print_overflow_msg(__func__, xdr);
3706 return -EIO;
3707 }
3708
3709 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3710 {
3711 __be32 *p;
3712 int status = 0;
3713
3714 *maxlink = 1;
3715 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3716 return -EIO;
3717 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3718 p = xdr_inline_decode(xdr, 4);
3719 if (unlikely(!p))
3720 goto out_overflow;
3721 *maxlink = be32_to_cpup(p);
3722 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3723 }
3724 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3725 return status;
3726 out_overflow:
3727 print_overflow_msg(__func__, xdr);
3728 return -EIO;
3729 }
3730
3731 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3732 {
3733 __be32 *p;
3734 int status = 0;
3735
3736 *maxname = 1024;
3737 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3738 return -EIO;
3739 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3740 p = xdr_inline_decode(xdr, 4);
3741 if (unlikely(!p))
3742 goto out_overflow;
3743 *maxname = be32_to_cpup(p);
3744 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3745 }
3746 dprintk("%s: maxname=%u\n", __func__, *maxname);
3747 return status;
3748 out_overflow:
3749 print_overflow_msg(__func__, xdr);
3750 return -EIO;
3751 }
3752
3753 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3754 {
3755 __be32 *p;
3756 int status = 0;
3757
3758 *res = 1024;
3759 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3760 return -EIO;
3761 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3762 uint64_t maxread;
3763 p = xdr_inline_decode(xdr, 8);
3764 if (unlikely(!p))
3765 goto out_overflow;
3766 xdr_decode_hyper(p, &maxread);
3767 if (maxread > 0x7FFFFFFF)
3768 maxread = 0x7FFFFFFF;
3769 *res = (uint32_t)maxread;
3770 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3771 }
3772 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3773 return status;
3774 out_overflow:
3775 print_overflow_msg(__func__, xdr);
3776 return -EIO;
3777 }
3778
3779 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3780 {
3781 __be32 *p;
3782 int status = 0;
3783
3784 *res = 1024;
3785 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3786 return -EIO;
3787 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3788 uint64_t maxwrite;
3789 p = xdr_inline_decode(xdr, 8);
3790 if (unlikely(!p))
3791 goto out_overflow;
3792 xdr_decode_hyper(p, &maxwrite);
3793 if (maxwrite > 0x7FFFFFFF)
3794 maxwrite = 0x7FFFFFFF;
3795 *res = (uint32_t)maxwrite;
3796 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3797 }
3798 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3799 return status;
3800 out_overflow:
3801 print_overflow_msg(__func__, xdr);
3802 return -EIO;
3803 }
3804
3805 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3806 {
3807 uint32_t tmp;
3808 __be32 *p;
3809 int ret = 0;
3810
3811 *mode = 0;
3812 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3813 return -EIO;
3814 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3815 p = xdr_inline_decode(xdr, 4);
3816 if (unlikely(!p))
3817 goto out_overflow;
3818 tmp = be32_to_cpup(p);
3819 *mode = tmp & ~S_IFMT;
3820 bitmap[1] &= ~FATTR4_WORD1_MODE;
3821 ret = NFS_ATTR_FATTR_MODE;
3822 }
3823 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3824 return ret;
3825 out_overflow:
3826 print_overflow_msg(__func__, xdr);
3827 return -EIO;
3828 }
3829
3830 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3831 {
3832 __be32 *p;
3833 int ret = 0;
3834
3835 *nlink = 1;
3836 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3837 return -EIO;
3838 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3839 p = xdr_inline_decode(xdr, 4);
3840 if (unlikely(!p))
3841 goto out_overflow;
3842 *nlink = be32_to_cpup(p);
3843 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3844 ret = NFS_ATTR_FATTR_NLINK;
3845 }
3846 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3847 return ret;
3848 out_overflow:
3849 print_overflow_msg(__func__, xdr);
3850 return -EIO;
3851 }
3852
3853 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3854 const struct nfs_server *server, kuid_t *uid,
3855 struct nfs4_string *owner_name)
3856 {
3857 uint32_t len;
3858 __be32 *p;
3859 int ret = 0;
3860
3861 *uid = make_kuid(&init_user_ns, -2);
3862 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3863 return -EIO;
3864 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3865 p = xdr_inline_decode(xdr, 4);
3866 if (unlikely(!p))
3867 goto out_overflow;
3868 len = be32_to_cpup(p);
3869 p = xdr_inline_decode(xdr, len);
3870 if (unlikely(!p))
3871 goto out_overflow;
3872 if (owner_name != NULL) {
3873 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3874 if (owner_name->data != NULL) {
3875 owner_name->len = len;
3876 ret = NFS_ATTR_FATTR_OWNER_NAME;
3877 }
3878 } else if (len < XDR_MAX_NETOBJ) {
3879 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3880 ret = NFS_ATTR_FATTR_OWNER;
3881 else
3882 dprintk("%s: nfs_map_name_to_uid failed!\n",
3883 __func__);
3884 } else
3885 dprintk("%s: name too long (%u)!\n",
3886 __func__, len);
3887 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3888 }
3889 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3890 return ret;
3891 out_overflow:
3892 print_overflow_msg(__func__, xdr);
3893 return -EIO;
3894 }
3895
3896 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3897 const struct nfs_server *server, kgid_t *gid,
3898 struct nfs4_string *group_name)
3899 {
3900 uint32_t len;
3901 __be32 *p;
3902 int ret = 0;
3903
3904 *gid = make_kgid(&init_user_ns, -2);
3905 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3906 return -EIO;
3907 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3908 p = xdr_inline_decode(xdr, 4);
3909 if (unlikely(!p))
3910 goto out_overflow;
3911 len = be32_to_cpup(p);
3912 p = xdr_inline_decode(xdr, len);
3913 if (unlikely(!p))
3914 goto out_overflow;
3915 if (group_name != NULL) {
3916 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3917 if (group_name->data != NULL) {
3918 group_name->len = len;
3919 ret = NFS_ATTR_FATTR_GROUP_NAME;
3920 }
3921 } else if (len < XDR_MAX_NETOBJ) {
3922 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3923 ret = NFS_ATTR_FATTR_GROUP;
3924 else
3925 dprintk("%s: nfs_map_group_to_gid failed!\n",
3926 __func__);
3927 } else
3928 dprintk("%s: name too long (%u)!\n",
3929 __func__, len);
3930 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3931 }
3932 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3933 return ret;
3934 out_overflow:
3935 print_overflow_msg(__func__, xdr);
3936 return -EIO;
3937 }
3938
3939 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3940 {
3941 uint32_t major = 0, minor = 0;
3942 __be32 *p;
3943 int ret = 0;
3944
3945 *rdev = MKDEV(0,0);
3946 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3947 return -EIO;
3948 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3949 dev_t tmp;
3950
3951 p = xdr_inline_decode(xdr, 8);
3952 if (unlikely(!p))
3953 goto out_overflow;
3954 major = be32_to_cpup(p++);
3955 minor = be32_to_cpup(p);
3956 tmp = MKDEV(major, minor);
3957 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3958 *rdev = tmp;
3959 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3960 ret = NFS_ATTR_FATTR_RDEV;
3961 }
3962 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3963 return ret;
3964 out_overflow:
3965 print_overflow_msg(__func__, xdr);
3966 return -EIO;
3967 }
3968
3969 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3970 {
3971 __be32 *p;
3972 int status = 0;
3973
3974 *res = 0;
3975 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3976 return -EIO;
3977 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3978 p = xdr_inline_decode(xdr, 8);
3979 if (unlikely(!p))
3980 goto out_overflow;
3981 xdr_decode_hyper(p, res);
3982 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3983 }
3984 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3985 return status;
3986 out_overflow:
3987 print_overflow_msg(__func__, xdr);
3988 return -EIO;
3989 }
3990
3991 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3992 {
3993 __be32 *p;
3994 int status = 0;
3995
3996 *res = 0;
3997 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3998 return -EIO;
3999 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4000 p = xdr_inline_decode(xdr, 8);
4001 if (unlikely(!p))
4002 goto out_overflow;
4003 xdr_decode_hyper(p, res);
4004 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4005 }
4006 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4007 return status;
4008 out_overflow:
4009 print_overflow_msg(__func__, xdr);
4010 return -EIO;
4011 }
4012
4013 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4014 {
4015 __be32 *p;
4016 int status = 0;
4017
4018 *res = 0;
4019 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4020 return -EIO;
4021 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4022 p = xdr_inline_decode(xdr, 8);
4023 if (unlikely(!p))
4024 goto out_overflow;
4025 xdr_decode_hyper(p, res);
4026 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4027 }
4028 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4029 return status;
4030 out_overflow:
4031 print_overflow_msg(__func__, xdr);
4032 return -EIO;
4033 }
4034
4035 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4036 {
4037 __be32 *p;
4038 int ret = 0;
4039
4040 *used = 0;
4041 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4042 return -EIO;
4043 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4044 p = xdr_inline_decode(xdr, 8);
4045 if (unlikely(!p))
4046 goto out_overflow;
4047 xdr_decode_hyper(p, used);
4048 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4049 ret = NFS_ATTR_FATTR_SPACE_USED;
4050 }
4051 dprintk("%s: space used=%Lu\n", __func__,
4052 (unsigned long long)*used);
4053 return ret;
4054 out_overflow:
4055 print_overflow_msg(__func__, xdr);
4056 return -EIO;
4057 }
4058
4059 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4060 {
4061 __be32 *p;
4062 uint64_t sec;
4063 uint32_t nsec;
4064
4065 p = xdr_inline_decode(xdr, 12);
4066 if (unlikely(!p))
4067 goto out_overflow;
4068 p = xdr_decode_hyper(p, &sec);
4069 nsec = be32_to_cpup(p);
4070 time->tv_sec = (time_t)sec;
4071 time->tv_nsec = (long)nsec;
4072 return 0;
4073 out_overflow:
4074 print_overflow_msg(__func__, xdr);
4075 return -EIO;
4076 }
4077
4078 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4079 {
4080 int status = 0;
4081
4082 time->tv_sec = 0;
4083 time->tv_nsec = 0;
4084 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4085 return -EIO;
4086 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4087 status = decode_attr_time(xdr, time);
4088 if (status == 0)
4089 status = NFS_ATTR_FATTR_ATIME;
4090 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4091 }
4092 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4093 return status;
4094 }
4095
4096 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097 {
4098 int status = 0;
4099
4100 time->tv_sec = 0;
4101 time->tv_nsec = 0;
4102 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4103 return -EIO;
4104 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4105 status = decode_attr_time(xdr, time);
4106 if (status == 0)
4107 status = NFS_ATTR_FATTR_CTIME;
4108 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4109 }
4110 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4111 return status;
4112 }
4113
4114 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4115 struct timespec *time)
4116 {
4117 int status = 0;
4118
4119 time->tv_sec = 0;
4120 time->tv_nsec = 0;
4121 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4122 return -EIO;
4123 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4124 status = decode_attr_time(xdr, time);
4125 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4126 }
4127 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4128 (long)time->tv_nsec);
4129 return status;
4130 }
4131
4132 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4133 struct nfs4_label *label)
4134 {
4135 uint32_t pi = 0;
4136 uint32_t lfs = 0;
4137 __u32 len;
4138 __be32 *p;
4139 int status = 0;
4140
4141 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4142 return -EIO;
4143 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4144 p = xdr_inline_decode(xdr, 4);
4145 if (unlikely(!p))
4146 goto out_overflow;
4147 lfs = be32_to_cpup(p++);
4148 p = xdr_inline_decode(xdr, 4);
4149 if (unlikely(!p))
4150 goto out_overflow;
4151 pi = be32_to_cpup(p++);
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 goto out_overflow;
4155 len = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, len);
4157 if (unlikely(!p))
4158 goto out_overflow;
4159 if (len < NFS4_MAXLABELLEN) {
4160 if (label) {
4161 memcpy(label->label, p, len);
4162 label->len = len;
4163 label->pi = pi;
4164 label->lfs = lfs;
4165 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4166 }
4167 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4168 } else
4169 printk(KERN_WARNING "%s: label too long (%u)!\n",
4170 __func__, len);
4171 }
4172 if (label && label->label)
4173 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4174 (char *)label->label, label->len, label->pi, label->lfs);
4175 return status;
4176
4177 out_overflow:
4178 print_overflow_msg(__func__, xdr);
4179 return -EIO;
4180 }
4181
4182 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4183 {
4184 int status = 0;
4185
4186 time->tv_sec = 0;
4187 time->tv_nsec = 0;
4188 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4189 return -EIO;
4190 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4191 status = decode_attr_time(xdr, time);
4192 if (status == 0)
4193 status = NFS_ATTR_FATTR_MTIME;
4194 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4195 }
4196 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4197 return status;
4198 }
4199
4200 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4201 {
4202 unsigned int attrwords = XDR_QUADLEN(attrlen);
4203 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4204
4205 if (unlikely(attrwords != nwords)) {
4206 dprintk("%s: server returned incorrect attribute length: "
4207 "%u %c %u\n",
4208 __func__,
4209 attrwords << 2,
4210 (attrwords < nwords) ? '<' : '>',
4211 nwords << 2);
4212 return -EIO;
4213 }
4214 return 0;
4215 }
4216
4217 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4218 {
4219 __be32 *p;
4220
4221 p = xdr_inline_decode(xdr, 20);
4222 if (unlikely(!p))
4223 goto out_overflow;
4224 cinfo->atomic = be32_to_cpup(p++);
4225 p = xdr_decode_hyper(p, &cinfo->before);
4226 xdr_decode_hyper(p, &cinfo->after);
4227 return 0;
4228 out_overflow:
4229 print_overflow_msg(__func__, xdr);
4230 return -EIO;
4231 }
4232
4233 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4234 {
4235 __be32 *p;
4236 uint32_t supp, acc;
4237 int status;
4238
4239 status = decode_op_hdr(xdr, OP_ACCESS);
4240 if (status)
4241 return status;
4242 p = xdr_inline_decode(xdr, 8);
4243 if (unlikely(!p))
4244 goto out_overflow;
4245 supp = be32_to_cpup(p++);
4246 acc = be32_to_cpup(p);
4247 *supported = supp;
4248 *access = acc;
4249 return 0;
4250 out_overflow:
4251 print_overflow_msg(__func__, xdr);
4252 return -EIO;
4253 }
4254
4255 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4256 {
4257 __be32 *p;
4258
4259 p = xdr_inline_decode(xdr, len);
4260 if (likely(p)) {
4261 memcpy(buf, p, len);
4262 return 0;
4263 }
4264 print_overflow_msg(__func__, xdr);
4265 return -EIO;
4266 }
4267
4268 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4269 {
4270 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4271 }
4272
4273 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4274 {
4275 int status;
4276
4277 status = decode_op_hdr(xdr, OP_CLOSE);
4278 if (status != -EIO)
4279 nfs_increment_open_seqid(status, res->seqid);
4280 if (!status)
4281 status = decode_stateid(xdr, &res->stateid);
4282 return status;
4283 }
4284
4285 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4286 {
4287 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4288 }
4289
4290 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4291 {
4292 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4293 }
4294
4295 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4296 {
4297 int status;
4298
4299 status = decode_op_hdr(xdr, OP_COMMIT);
4300 if (!status)
4301 status = decode_write_verifier(xdr, &res->verf->verifier);
4302 return status;
4303 }
4304
4305 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4306 {
4307 __be32 *p;
4308 uint32_t bmlen;
4309 int status;
4310
4311 status = decode_op_hdr(xdr, OP_CREATE);
4312 if (status)
4313 return status;
4314 if ((status = decode_change_info(xdr, cinfo)))
4315 return status;
4316 p = xdr_inline_decode(xdr, 4);
4317 if (unlikely(!p))
4318 goto out_overflow;
4319 bmlen = be32_to_cpup(p);
4320 p = xdr_inline_decode(xdr, bmlen << 2);
4321 if (likely(p))
4322 return 0;
4323 out_overflow:
4324 print_overflow_msg(__func__, xdr);
4325 return -EIO;
4326 }
4327
4328 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4329 {
4330 unsigned int savep;
4331 uint32_t attrlen, bitmap[3] = {0};
4332 int status;
4333
4334 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4335 goto xdr_error;
4336 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4337 goto xdr_error;
4338 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4339 goto xdr_error;
4340 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4341 goto xdr_error;
4342 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4343 &res->fh_expire_type)) != 0)
4344 goto xdr_error;
4345 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4346 goto xdr_error;
4347 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4348 goto xdr_error;
4349 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4350 goto xdr_error;
4351 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4352 res->exclcreat_bitmask)) != 0)
4353 goto xdr_error;
4354 status = verify_attr_len(xdr, savep, attrlen);
4355 xdr_error:
4356 dprintk("%s: xdr returned %d!\n", __func__, -status);
4357 return status;
4358 }
4359
4360 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4361 {
4362 unsigned int savep;
4363 uint32_t attrlen, bitmap[3] = {0};
4364 int status;
4365
4366 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4369 goto xdr_error;
4370 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4371 goto xdr_error;
4372
4373 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4374 goto xdr_error;
4375 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4376 goto xdr_error;
4377 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4378 goto xdr_error;
4379
4380 status = -EIO;
4381 if (unlikely(bitmap[0]))
4382 goto xdr_error;
4383
4384 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4389 goto xdr_error;
4390
4391 status = verify_attr_len(xdr, savep, attrlen);
4392 xdr_error:
4393 dprintk("%s: xdr returned %d!\n", __func__, -status);
4394 return status;
4395 }
4396
4397 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4398 {
4399 unsigned int savep;
4400 uint32_t attrlen, bitmap[3] = {0};
4401 int status;
4402
4403 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4404 goto xdr_error;
4405 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4406 goto xdr_error;
4407 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4408 goto xdr_error;
4409
4410 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4411 goto xdr_error;
4412 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4413 goto xdr_error;
4414
4415 status = verify_attr_len(xdr, savep, attrlen);
4416 xdr_error:
4417 dprintk("%s: xdr returned %d!\n", __func__, -status);
4418 return status;
4419 }
4420
4421 static int decode_threshold_hint(struct xdr_stream *xdr,
4422 uint32_t *bitmap,
4423 uint64_t *res,
4424 uint32_t hint_bit)
4425 {
4426 __be32 *p;
4427
4428 *res = 0;
4429 if (likely(bitmap[0] & hint_bit)) {
4430 p = xdr_inline_decode(xdr, 8);
4431 if (unlikely(!p))
4432 goto out_overflow;
4433 xdr_decode_hyper(p, res);
4434 }
4435 return 0;
4436 out_overflow:
4437 print_overflow_msg(__func__, xdr);
4438 return -EIO;
4439 }
4440
4441 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4442 struct nfs4_threshold *res)
4443 {
4444 __be32 *p;
4445 unsigned int savep;
4446 uint32_t bitmap[3] = {0,}, attrlen;
4447 int status;
4448
4449 /* layout type */
4450 p = xdr_inline_decode(xdr, 4);
4451 if (unlikely(!p)) {
4452 print_overflow_msg(__func__, xdr);
4453 return -EIO;
4454 }
4455 res->l_type = be32_to_cpup(p);
4456
4457 /* thi_hintset bitmap */
4458 status = decode_attr_bitmap(xdr, bitmap);
4459 if (status < 0)
4460 goto xdr_error;
4461
4462 /* thi_hintlist length */
4463 status = decode_attr_length(xdr, &attrlen, &savep);
4464 if (status < 0)
4465 goto xdr_error;
4466 /* thi_hintlist */
4467 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4468 if (status < 0)
4469 goto xdr_error;
4470 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4471 if (status < 0)
4472 goto xdr_error;
4473 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4474 THRESHOLD_RD_IO);
4475 if (status < 0)
4476 goto xdr_error;
4477 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4478 THRESHOLD_WR_IO);
4479 if (status < 0)
4480 goto xdr_error;
4481
4482 status = verify_attr_len(xdr, savep, attrlen);
4483 res->bm = bitmap[0];
4484
4485 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4486 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4487 res->wr_io_sz);
4488 xdr_error:
4489 dprintk("%s ret=%d!\n", __func__, status);
4490 return status;
4491 }
4492
4493 /*
4494 * Thresholds on pNFS direct I/O vrs MDS I/O
4495 */
4496 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4497 uint32_t *bitmap,
4498 struct nfs4_threshold *res)
4499 {
4500 __be32 *p;
4501 int status = 0;
4502 uint32_t num;
4503
4504 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4505 return -EIO;
4506 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4507 /* Did the server return an unrequested attribute? */
4508 if (unlikely(res == NULL))
4509 return -EREMOTEIO;
4510 p = xdr_inline_decode(xdr, 4);
4511 if (unlikely(!p))
4512 goto out_overflow;
4513 num = be32_to_cpup(p);
4514 if (num == 0)
4515 return 0;
4516 if (num > 1)
4517 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4518 "drivers per filesystem not supported\n",
4519 __func__);
4520
4521 status = decode_first_threshold_item4(xdr, res);
4522 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4523 }
4524 return status;
4525 out_overflow:
4526 print_overflow_msg(__func__, xdr);
4527 return -EIO;
4528 }
4529
4530 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4531 struct nfs_fattr *fattr, struct nfs_fh *fh,
4532 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4533 const struct nfs_server *server)
4534 {
4535 int status;
4536 umode_t fmode = 0;
4537 uint32_t type;
4538 int32_t err;
4539
4540 status = decode_attr_type(xdr, bitmap, &type);
4541 if (status < 0)
4542 goto xdr_error;
4543 fattr->mode = 0;
4544 if (status != 0) {
4545 fattr->mode |= nfs_type2fmt[type];
4546 fattr->valid |= status;
4547 }
4548
4549 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4550 if (status < 0)
4551 goto xdr_error;
4552 fattr->valid |= status;
4553
4554 status = decode_attr_size(xdr, bitmap, &fattr->size);
4555 if (status < 0)
4556 goto xdr_error;
4557 fattr->valid |= status;
4558
4559 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4560 if (status < 0)
4561 goto xdr_error;
4562 fattr->valid |= status;
4563
4564 err = 0;
4565 status = decode_attr_error(xdr, bitmap, &err);
4566 if (status < 0)
4567 goto xdr_error;
4568
4569 status = decode_attr_filehandle(xdr, bitmap, fh);
4570 if (status < 0)
4571 goto xdr_error;
4572
4573 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4579 if (status < 0)
4580 goto xdr_error;
4581 fattr->valid |= status;
4582
4583 status = -EIO;
4584 if (unlikely(bitmap[0]))
4585 goto xdr_error;
4586
4587 status = decode_attr_mode(xdr, bitmap, &fmode);
4588 if (status < 0)
4589 goto xdr_error;
4590 if (status != 0) {
4591 fattr->mode |= fmode;
4592 fattr->valid |= status;
4593 }
4594
4595 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4596 if (status < 0)
4597 goto xdr_error;
4598 fattr->valid |= status;
4599
4600 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4601 if (status < 0)
4602 goto xdr_error;
4603 fattr->valid |= status;
4604
4605 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4606 if (status < 0)
4607 goto xdr_error;
4608 fattr->valid |= status;
4609
4610 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4611 if (status < 0)
4612 goto xdr_error;
4613 fattr->valid |= status;
4614
4615 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4616 if (status < 0)
4617 goto xdr_error;
4618 fattr->valid |= status;
4619
4620 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4621 if (status < 0)
4622 goto xdr_error;
4623 fattr->valid |= status;
4624
4625 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4626 if (status < 0)
4627 goto xdr_error;
4628 fattr->valid |= status;
4629
4630 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4631 if (status < 0)
4632 goto xdr_error;
4633 fattr->valid |= status;
4634
4635 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4636 if (status < 0)
4637 goto xdr_error;
4638 fattr->valid |= status;
4639
4640 status = -EIO;
4641 if (unlikely(bitmap[1]))
4642 goto xdr_error;
4643
4644 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4645 if (status < 0)
4646 goto xdr_error;
4647
4648 if (label) {
4649 status = decode_attr_security_label(xdr, bitmap, label);
4650 if (status < 0)
4651 goto xdr_error;
4652 fattr->valid |= status;
4653 }
4654
4655 xdr_error:
4656 dprintk("%s: xdr returned %d\n", __func__, -status);
4657 return status;
4658 }
4659
4660 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4661 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4662 struct nfs4_label *label, const struct nfs_server *server)
4663 {
4664 unsigned int savep;
4665 uint32_t attrlen,
4666 bitmap[3] = {0};
4667 int status;
4668
4669 status = decode_op_hdr(xdr, OP_GETATTR);
4670 if (status < 0)
4671 goto xdr_error;
4672
4673 status = decode_attr_bitmap(xdr, bitmap);
4674 if (status < 0)
4675 goto xdr_error;
4676
4677 status = decode_attr_length(xdr, &attrlen, &savep);
4678 if (status < 0)
4679 goto xdr_error;
4680
4681 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4682 label, server);
4683 if (status < 0)
4684 goto xdr_error;
4685
4686 status = verify_attr_len(xdr, savep, attrlen);
4687 xdr_error:
4688 dprintk("%s: xdr returned %d\n", __func__, -status);
4689 return status;
4690 }
4691
4692 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4693 struct nfs4_label *label, const struct nfs_server *server)
4694 {
4695 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4696 }
4697
4698 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4699 const struct nfs_server *server)
4700 {
4701 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4702 }
4703
4704 /*
4705 * Decode potentially multiple layout types. Currently we only support
4706 * one layout driver per file system.
4707 */
4708 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4709 uint32_t *layouttype)
4710 {
4711 __be32 *p;
4712 int num;
4713
4714 p = xdr_inline_decode(xdr, 4);
4715 if (unlikely(!p))
4716 goto out_overflow;
4717 num = be32_to_cpup(p);
4718
4719 /* pNFS is not supported by the underlying file system */
4720 if (num == 0) {
4721 *layouttype = 0;
4722 return 0;
4723 }
4724 if (num > 1)
4725 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4726 "drivers per filesystem not supported\n", __func__);
4727
4728 /* Decode and set first layout type, move xdr->p past unused types */
4729 p = xdr_inline_decode(xdr, num * 4);
4730 if (unlikely(!p))
4731 goto out_overflow;
4732 *layouttype = be32_to_cpup(p);
4733 return 0;
4734 out_overflow:
4735 print_overflow_msg(__func__, xdr);
4736 return -EIO;
4737 }
4738
4739 /*
4740 * The type of file system exported.
4741 * Note we must ensure that layouttype is set in any non-error case.
4742 */
4743 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4744 uint32_t *layouttype)
4745 {
4746 int status = 0;
4747
4748 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4749 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4750 return -EIO;
4751 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4752 status = decode_first_pnfs_layout_type(xdr, layouttype);
4753 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4754 } else
4755 *layouttype = 0;
4756 return status;
4757 }
4758
4759 /*
4760 * The prefered block size for layout directed io
4761 */
4762 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4763 uint32_t *res)
4764 {
4765 __be32 *p;
4766
4767 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4768 *res = 0;
4769 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4770 p = xdr_inline_decode(xdr, 4);
4771 if (unlikely(!p)) {
4772 print_overflow_msg(__func__, xdr);
4773 return -EIO;
4774 }
4775 *res = be32_to_cpup(p);
4776 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4777 }
4778 return 0;
4779 }
4780
4781 /*
4782 * The granularity of a CLONE operation.
4783 */
4784 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4785 uint32_t *res)
4786 {
4787 __be32 *p;
4788
4789 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4790 *res = 0;
4791 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4792 p = xdr_inline_decode(xdr, 4);
4793 if (unlikely(!p)) {
4794 print_overflow_msg(__func__, xdr);
4795 return -EIO;
4796 }
4797 *res = be32_to_cpup(p);
4798 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4799 }
4800 return 0;
4801 }
4802
4803 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4804 {
4805 unsigned int savep;
4806 uint32_t attrlen, bitmap[3];
4807 int status;
4808
4809 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4810 goto xdr_error;
4811 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4812 goto xdr_error;
4813 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4814 goto xdr_error;
4815
4816 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4817
4818 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4819 goto xdr_error;
4820 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4821 goto xdr_error;
4822 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4823 goto xdr_error;
4824 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4825 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4826 goto xdr_error;
4827 fsinfo->wtpref = fsinfo->wtmax;
4828
4829 status = -EIO;
4830 if (unlikely(bitmap[0]))
4831 goto xdr_error;
4832
4833 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4834 if (status != 0)
4835 goto xdr_error;
4836 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4837 if (status != 0)
4838 goto xdr_error;
4839
4840 status = -EIO;
4841 if (unlikely(bitmap[1]))
4842 goto xdr_error;
4843
4844 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4845 if (status)
4846 goto xdr_error;
4847 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4848 if (status)
4849 goto xdr_error;
4850
4851 status = verify_attr_len(xdr, savep, attrlen);
4852 xdr_error:
4853 dprintk("%s: xdr returned %d!\n", __func__, -status);
4854 return status;
4855 }
4856
4857 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4858 {
4859 __be32 *p;
4860 uint32_t len;
4861 int status;
4862
4863 /* Zero handle first to allow comparisons */
4864 memset(fh, 0, sizeof(*fh));
4865
4866 status = decode_op_hdr(xdr, OP_GETFH);
4867 if (status)
4868 return status;
4869
4870 p = xdr_inline_decode(xdr, 4);
4871 if (unlikely(!p))
4872 goto out_overflow;
4873 len = be32_to_cpup(p);
4874 if (len > NFS4_FHSIZE)
4875 return -EIO;
4876 fh->size = len;
4877 p = xdr_inline_decode(xdr, len);
4878 if (unlikely(!p))
4879 goto out_overflow;
4880 memcpy(fh->data, p, len);
4881 return 0;
4882 out_overflow:
4883 print_overflow_msg(__func__, xdr);
4884 return -EIO;
4885 }
4886
4887 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4888 {
4889 int status;
4890
4891 status = decode_op_hdr(xdr, OP_LINK);
4892 if (status)
4893 return status;
4894 return decode_change_info(xdr, cinfo);
4895 }
4896
4897 /*
4898 * We create the owner, so we know a proper owner.id length is 4.
4899 */
4900 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4901 {
4902 uint64_t offset, length, clientid;
4903 __be32 *p;
4904 uint32_t namelen, type;
4905
4906 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4907 if (unlikely(!p))
4908 goto out_overflow;
4909 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4910 p = xdr_decode_hyper(p, &length);
4911 type = be32_to_cpup(p++); /* 4 byte read */
4912 if (fl != NULL) { /* manipulate file lock */
4913 fl->fl_start = (loff_t)offset;
4914 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4915 if (length == ~(uint64_t)0)
4916 fl->fl_end = OFFSET_MAX;
4917 fl->fl_type = F_WRLCK;
4918 if (type & 1)
4919 fl->fl_type = F_RDLCK;
4920 fl->fl_pid = 0;
4921 }
4922 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4923 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4924 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4925 if (likely(p))
4926 return -NFS4ERR_DENIED;
4927 out_overflow:
4928 print_overflow_msg(__func__, xdr);
4929 return -EIO;
4930 }
4931
4932 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4933 {
4934 int status;
4935
4936 status = decode_op_hdr(xdr, OP_LOCK);
4937 if (status == -EIO)
4938 goto out;
4939 if (status == 0) {
4940 status = decode_stateid(xdr, &res->stateid);
4941 if (unlikely(status))
4942 goto out;
4943 } else if (status == -NFS4ERR_DENIED)
4944 status = decode_lock_denied(xdr, NULL);
4945 if (res->open_seqid != NULL)
4946 nfs_increment_open_seqid(status, res->open_seqid);
4947 nfs_increment_lock_seqid(status, res->lock_seqid);
4948 out:
4949 return status;
4950 }
4951
4952 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4953 {
4954 int status;
4955 status = decode_op_hdr(xdr, OP_LOCKT);
4956 if (status == -NFS4ERR_DENIED)
4957 return decode_lock_denied(xdr, res->denied);
4958 return status;
4959 }
4960
4961 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4962 {
4963 int status;
4964
4965 status = decode_op_hdr(xdr, OP_LOCKU);
4966 if (status != -EIO)
4967 nfs_increment_lock_seqid(status, res->seqid);
4968 if (status == 0)
4969 status = decode_stateid(xdr, &res->stateid);
4970 return status;
4971 }
4972
4973 static int decode_release_lockowner(struct xdr_stream *xdr)
4974 {
4975 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4976 }
4977
4978 static int decode_lookup(struct xdr_stream *xdr)
4979 {
4980 return decode_op_hdr(xdr, OP_LOOKUP);
4981 }
4982
4983 /* This is too sick! */
4984 static int decode_space_limit(struct xdr_stream *xdr,
4985 unsigned long *pagemod_limit)
4986 {
4987 __be32 *p;
4988 uint32_t limit_type, nblocks, blocksize;
4989 u64 maxsize = 0;
4990
4991 p = xdr_inline_decode(xdr, 12);
4992 if (unlikely(!p))
4993 goto out_overflow;
4994 limit_type = be32_to_cpup(p++);
4995 switch (limit_type) {
4996 case NFS4_LIMIT_SIZE:
4997 xdr_decode_hyper(p, &maxsize);
4998 break;
4999 case NFS4_LIMIT_BLOCKS:
5000 nblocks = be32_to_cpup(p++);
5001 blocksize = be32_to_cpup(p);
5002 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5003 }
5004 maxsize >>= PAGE_CACHE_SHIFT;
5005 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5006 return 0;
5007 out_overflow:
5008 print_overflow_msg(__func__, xdr);
5009 return -EIO;
5010 }
5011
5012 static int decode_rw_delegation(struct xdr_stream *xdr,
5013 uint32_t delegation_type,
5014 struct nfs_openres *res)
5015 {
5016 __be32 *p;
5017 int status;
5018
5019 status = decode_stateid(xdr, &res->delegation);
5020 if (unlikely(status))
5021 return status;
5022 p = xdr_inline_decode(xdr, 4);
5023 if (unlikely(!p))
5024 goto out_overflow;
5025 res->do_recall = be32_to_cpup(p);
5026
5027 switch (delegation_type) {
5028 case NFS4_OPEN_DELEGATE_READ:
5029 res->delegation_type = FMODE_READ;
5030 break;
5031 case NFS4_OPEN_DELEGATE_WRITE:
5032 res->delegation_type = FMODE_WRITE|FMODE_READ;
5033 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5034 return -EIO;
5035 }
5036 return decode_ace(xdr, NULL, res->server->nfs_client);
5037 out_overflow:
5038 print_overflow_msg(__func__, xdr);
5039 return -EIO;
5040 }
5041
5042 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5043 {
5044 __be32 *p;
5045 uint32_t why_no_delegation;
5046
5047 p = xdr_inline_decode(xdr, 4);
5048 if (unlikely(!p))
5049 goto out_overflow;
5050 why_no_delegation = be32_to_cpup(p);
5051 switch (why_no_delegation) {
5052 case WND4_CONTENTION:
5053 case WND4_RESOURCE:
5054 xdr_inline_decode(xdr, 4);
5055 /* Ignore for now */
5056 }
5057 return 0;
5058 out_overflow:
5059 print_overflow_msg(__func__, xdr);
5060 return -EIO;
5061 }
5062
5063 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5064 {
5065 __be32 *p;
5066 uint32_t delegation_type;
5067
5068 p = xdr_inline_decode(xdr, 4);
5069 if (unlikely(!p))
5070 goto out_overflow;
5071 delegation_type = be32_to_cpup(p);
5072 res->delegation_type = 0;
5073 switch (delegation_type) {
5074 case NFS4_OPEN_DELEGATE_NONE:
5075 return 0;
5076 case NFS4_OPEN_DELEGATE_READ:
5077 case NFS4_OPEN_DELEGATE_WRITE:
5078 return decode_rw_delegation(xdr, delegation_type, res);
5079 case NFS4_OPEN_DELEGATE_NONE_EXT:
5080 return decode_no_delegation(xdr, res);
5081 }
5082 return -EIO;
5083 out_overflow:
5084 print_overflow_msg(__func__, xdr);
5085 return -EIO;
5086 }
5087
5088 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5089 {
5090 __be32 *p;
5091 uint32_t savewords, bmlen, i;
5092 int status;
5093
5094 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5095 return status;
5096 nfs_increment_open_seqid(status, res->seqid);
5097 if (status)
5098 return status;
5099 status = decode_stateid(xdr, &res->stateid);
5100 if (unlikely(status))
5101 return status;
5102
5103 decode_change_info(xdr, &res->cinfo);
5104
5105 p = xdr_inline_decode(xdr, 8);
5106 if (unlikely(!p))
5107 goto out_overflow;
5108 res->rflags = be32_to_cpup(p++);
5109 bmlen = be32_to_cpup(p);
5110 if (bmlen > 10)
5111 goto xdr_error;
5112
5113 p = xdr_inline_decode(xdr, bmlen << 2);
5114 if (unlikely(!p))
5115 goto out_overflow;
5116 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5117 for (i = 0; i < savewords; ++i)
5118 res->attrset[i] = be32_to_cpup(p++);
5119 for (; i < NFS4_BITMAP_SIZE; i++)
5120 res->attrset[i] = 0;
5121
5122 return decode_delegation(xdr, res);
5123 xdr_error:
5124 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5125 return -EIO;
5126 out_overflow:
5127 print_overflow_msg(__func__, xdr);
5128 return -EIO;
5129 }
5130
5131 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5132 {
5133 int status;
5134
5135 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5136 if (status != -EIO)
5137 nfs_increment_open_seqid(status, res->seqid);
5138 if (!status)
5139 status = decode_stateid(xdr, &res->stateid);
5140 return status;
5141 }
5142
5143 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5144 {
5145 int status;
5146
5147 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5148 if (status != -EIO)
5149 nfs_increment_open_seqid(status, res->seqid);
5150 if (!status)
5151 status = decode_stateid(xdr, &res->stateid);
5152 return status;
5153 }
5154
5155 static int decode_putfh(struct xdr_stream *xdr)
5156 {
5157 return decode_op_hdr(xdr, OP_PUTFH);
5158 }
5159
5160 static int decode_putrootfh(struct xdr_stream *xdr)
5161 {
5162 return decode_op_hdr(xdr, OP_PUTROOTFH);
5163 }
5164
5165 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5166 struct nfs_pgio_res *res)
5167 {
5168 __be32 *p;
5169 uint32_t count, eof, recvd;
5170 int status;
5171
5172 status = decode_op_hdr(xdr, OP_READ);
5173 if (status)
5174 return status;
5175 p = xdr_inline_decode(xdr, 8);
5176 if (unlikely(!p))
5177 goto out_overflow;
5178 eof = be32_to_cpup(p++);
5179 count = be32_to_cpup(p);
5180 recvd = xdr_read_pages(xdr, count);
5181 if (count > recvd) {
5182 dprintk("NFS: server cheating in read reply: "
5183 "count %u > recvd %u\n", count, recvd);
5184 count = recvd;
5185 eof = 0;
5186 }
5187 res->eof = eof;
5188 res->count = count;
5189 return 0;
5190 out_overflow:
5191 print_overflow_msg(__func__, xdr);
5192 return -EIO;
5193 }
5194
5195 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5196 {
5197 int status;
5198 __be32 verf[2];
5199
5200 status = decode_op_hdr(xdr, OP_READDIR);
5201 if (!status)
5202 status = decode_verifier(xdr, readdir->verifier.data);
5203 if (unlikely(status))
5204 return status;
5205 memcpy(verf, readdir->verifier.data, sizeof(verf));
5206 dprintk("%s: verifier = %08x:%08x\n",
5207 __func__, verf[0], verf[1]);
5208 return xdr_read_pages(xdr, xdr->buf->page_len);
5209 }
5210
5211 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5212 {
5213 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5214 u32 len, recvd;
5215 __be32 *p;
5216 int status;
5217
5218 status = decode_op_hdr(xdr, OP_READLINK);
5219 if (status)
5220 return status;
5221
5222 /* Convert length of symlink */
5223 p = xdr_inline_decode(xdr, 4);
5224 if (unlikely(!p))
5225 goto out_overflow;
5226 len = be32_to_cpup(p);
5227 if (len >= rcvbuf->page_len || len <= 0) {
5228 dprintk("nfs: server returned giant symlink!\n");
5229 return -ENAMETOOLONG;
5230 }
5231 recvd = xdr_read_pages(xdr, len);
5232 if (recvd < len) {
5233 dprintk("NFS: server cheating in readlink reply: "
5234 "count %u > recvd %u\n", len, recvd);
5235 return -EIO;
5236 }
5237 /*
5238 * The XDR encode routine has set things up so that
5239 * the link text will be copied directly into the
5240 * buffer. We just have to do overflow-checking,
5241 * and and null-terminate the text (the VFS expects
5242 * null-termination).
5243 */
5244 xdr_terminate_string(rcvbuf, len);
5245 return 0;
5246 out_overflow:
5247 print_overflow_msg(__func__, xdr);
5248 return -EIO;
5249 }
5250
5251 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5252 {
5253 int status;
5254
5255 status = decode_op_hdr(xdr, OP_REMOVE);
5256 if (status)
5257 goto out;
5258 status = decode_change_info(xdr, cinfo);
5259 out:
5260 return status;
5261 }
5262
5263 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5264 struct nfs4_change_info *new_cinfo)
5265 {
5266 int status;
5267
5268 status = decode_op_hdr(xdr, OP_RENAME);
5269 if (status)
5270 goto out;
5271 if ((status = decode_change_info(xdr, old_cinfo)))
5272 goto out;
5273 status = decode_change_info(xdr, new_cinfo);
5274 out:
5275 return status;
5276 }
5277
5278 static int decode_renew(struct xdr_stream *xdr)
5279 {
5280 return decode_op_hdr(xdr, OP_RENEW);
5281 }
5282
5283 static int
5284 decode_restorefh(struct xdr_stream *xdr)
5285 {
5286 return decode_op_hdr(xdr, OP_RESTOREFH);
5287 }
5288
5289 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5290 struct nfs_getaclres *res)
5291 {
5292 unsigned int savep;
5293 uint32_t attrlen,
5294 bitmap[3] = {0};
5295 int status;
5296 unsigned int pg_offset;
5297
5298 res->acl_len = 0;
5299 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5300 goto out;
5301
5302 xdr_enter_page(xdr, xdr->buf->page_len);
5303
5304 /* Calculate the offset of the page data */
5305 pg_offset = xdr->buf->head[0].iov_len;
5306
5307 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5308 goto out;
5309 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5310 goto out;
5311
5312 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5313 return -EIO;
5314 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5315
5316 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5317 * are stored with the acl data to handle the problem of
5318 * variable length bitmaps.*/
5319 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5320 res->acl_len = attrlen;
5321
5322 /* Check for receive buffer overflow */
5323 if (res->acl_len > (xdr->nwords << 2) ||
5324 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5325 res->acl_flags |= NFS4_ACL_TRUNC;
5326 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5327 attrlen, xdr->nwords << 2);
5328 }
5329 } else
5330 status = -EOPNOTSUPP;
5331
5332 out:
5333 return status;
5334 }
5335
5336 static int
5337 decode_savefh(struct xdr_stream *xdr)
5338 {
5339 return decode_op_hdr(xdr, OP_SAVEFH);
5340 }
5341
5342 static int decode_setattr(struct xdr_stream *xdr)
5343 {
5344 __be32 *p;
5345 uint32_t bmlen;
5346 int status;
5347
5348 status = decode_op_hdr(xdr, OP_SETATTR);
5349 if (status)
5350 return status;
5351 p = xdr_inline_decode(xdr, 4);
5352 if (unlikely(!p))
5353 goto out_overflow;
5354 bmlen = be32_to_cpup(p);
5355 p = xdr_inline_decode(xdr, bmlen << 2);
5356 if (likely(p))
5357 return 0;
5358 out_overflow:
5359 print_overflow_msg(__func__, xdr);
5360 return -EIO;
5361 }
5362
5363 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5364 {
5365 __be32 *p;
5366 uint32_t opnum;
5367 int32_t nfserr;
5368
5369 p = xdr_inline_decode(xdr, 8);
5370 if (unlikely(!p))
5371 goto out_overflow;
5372 opnum = be32_to_cpup(p++);
5373 if (opnum != OP_SETCLIENTID) {
5374 dprintk("nfs: decode_setclientid: Server returned operation"
5375 " %d\n", opnum);
5376 return -EIO;
5377 }
5378 nfserr = be32_to_cpup(p);
5379 if (nfserr == NFS_OK) {
5380 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5381 if (unlikely(!p))
5382 goto out_overflow;
5383 p = xdr_decode_hyper(p, &res->clientid);
5384 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5385 } else if (nfserr == NFSERR_CLID_INUSE) {
5386 uint32_t len;
5387
5388 /* skip netid string */
5389 p = xdr_inline_decode(xdr, 4);
5390 if (unlikely(!p))
5391 goto out_overflow;
5392 len = be32_to_cpup(p);
5393 p = xdr_inline_decode(xdr, len);
5394 if (unlikely(!p))
5395 goto out_overflow;
5396
5397 /* skip uaddr string */
5398 p = xdr_inline_decode(xdr, 4);
5399 if (unlikely(!p))
5400 goto out_overflow;
5401 len = be32_to_cpup(p);
5402 p = xdr_inline_decode(xdr, len);
5403 if (unlikely(!p))
5404 goto out_overflow;
5405 return -NFSERR_CLID_INUSE;
5406 } else
5407 return nfs4_stat_to_errno(nfserr);
5408
5409 return 0;
5410 out_overflow:
5411 print_overflow_msg(__func__, xdr);
5412 return -EIO;
5413 }
5414
5415 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5416 {
5417 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5418 }
5419
5420 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5421 {
5422 __be32 *p;
5423 int status;
5424
5425 status = decode_op_hdr(xdr, OP_WRITE);
5426 if (status)
5427 return status;
5428
5429 p = xdr_inline_decode(xdr, 8);
5430 if (unlikely(!p))
5431 goto out_overflow;
5432 res->count = be32_to_cpup(p++);
5433 res->verf->committed = be32_to_cpup(p++);
5434 return decode_write_verifier(xdr, &res->verf->verifier);
5435 out_overflow:
5436 print_overflow_msg(__func__, xdr);
5437 return -EIO;
5438 }
5439
5440 static int decode_delegreturn(struct xdr_stream *xdr)
5441 {
5442 return decode_op_hdr(xdr, OP_DELEGRETURN);
5443 }
5444
5445 static int decode_secinfo_gss(struct xdr_stream *xdr,
5446 struct nfs4_secinfo4 *flavor)
5447 {
5448 u32 oid_len;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 goto out_overflow;
5454 oid_len = be32_to_cpup(p);
5455 if (oid_len > GSS_OID_MAX_LEN)
5456 goto out_err;
5457
5458 p = xdr_inline_decode(xdr, oid_len);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5462 flavor->flavor_info.oid.len = oid_len;
5463
5464 p = xdr_inline_decode(xdr, 8);
5465 if (unlikely(!p))
5466 goto out_overflow;
5467 flavor->flavor_info.qop = be32_to_cpup(p++);
5468 flavor->flavor_info.service = be32_to_cpup(p);
5469
5470 return 0;
5471
5472 out_overflow:
5473 print_overflow_msg(__func__, xdr);
5474 return -EIO;
5475 out_err:
5476 return -EINVAL;
5477 }
5478
5479 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5480 {
5481 struct nfs4_secinfo4 *sec_flavor;
5482 unsigned int i, num_flavors;
5483 int status;
5484 __be32 *p;
5485
5486 p = xdr_inline_decode(xdr, 4);
5487 if (unlikely(!p))
5488 goto out_overflow;
5489
5490 res->flavors->num_flavors = 0;
5491 num_flavors = be32_to_cpup(p);
5492
5493 for (i = 0; i < num_flavors; i++) {
5494 sec_flavor = &res->flavors->flavors[i];
5495 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5496 break;
5497
5498 p = xdr_inline_decode(xdr, 4);
5499 if (unlikely(!p))
5500 goto out_overflow;
5501 sec_flavor->flavor = be32_to_cpup(p);
5502
5503 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5504 status = decode_secinfo_gss(xdr, sec_flavor);
5505 if (status)
5506 goto out;
5507 }
5508 res->flavors->num_flavors++;
5509 }
5510
5511 status = 0;
5512 out:
5513 return status;
5514 out_overflow:
5515 print_overflow_msg(__func__, xdr);
5516 return -EIO;
5517 }
5518
5519 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520 {
5521 int status = decode_op_hdr(xdr, OP_SECINFO);
5522 if (status)
5523 return status;
5524 return decode_secinfo_common(xdr, res);
5525 }
5526
5527 #if defined(CONFIG_NFS_V4_1)
5528 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5529 {
5530 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5531 if (status)
5532 return status;
5533 return decode_secinfo_common(xdr, res);
5534 }
5535
5536 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5537 {
5538 __be32 *p;
5539 uint32_t bitmap_words;
5540 unsigned int i;
5541
5542 p = xdr_inline_decode(xdr, 4);
5543 bitmap_words = be32_to_cpup(p++);
5544 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5545 return -EIO;
5546 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5547 for (i = 0; i < bitmap_words; i++)
5548 op_map->u.words[i] = be32_to_cpup(p++);
5549
5550 return 0;
5551 }
5552
5553 static int decode_exchange_id(struct xdr_stream *xdr,
5554 struct nfs41_exchange_id_res *res)
5555 {
5556 __be32 *p;
5557 uint32_t dummy;
5558 char *dummy_str;
5559 int status;
5560 uint32_t impl_id_count;
5561
5562 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5563 if (status)
5564 return status;
5565
5566 p = xdr_inline_decode(xdr, 8);
5567 if (unlikely(!p))
5568 goto out_overflow;
5569 xdr_decode_hyper(p, &res->clientid);
5570 p = xdr_inline_decode(xdr, 12);
5571 if (unlikely(!p))
5572 goto out_overflow;
5573 res->seqid = be32_to_cpup(p++);
5574 res->flags = be32_to_cpup(p++);
5575
5576 res->state_protect.how = be32_to_cpup(p);
5577 switch (res->state_protect.how) {
5578 case SP4_NONE:
5579 break;
5580 case SP4_MACH_CRED:
5581 status = decode_op_map(xdr, &res->state_protect.enforce);
5582 if (status)
5583 return status;
5584 status = decode_op_map(xdr, &res->state_protect.allow);
5585 if (status)
5586 return status;
5587 break;
5588 default:
5589 WARN_ON_ONCE(1);
5590 return -EIO;
5591 }
5592
5593 /* server_owner4.so_minor_id */
5594 p = xdr_inline_decode(xdr, 8);
5595 if (unlikely(!p))
5596 goto out_overflow;
5597 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5598
5599 /* server_owner4.so_major_id */
5600 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5601 if (unlikely(status))
5602 return status;
5603 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5604 return -EIO;
5605 memcpy(res->server_owner->major_id, dummy_str, dummy);
5606 res->server_owner->major_id_sz = dummy;
5607
5608 /* server_scope4 */
5609 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5610 if (unlikely(status))
5611 return status;
5612 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5613 return -EIO;
5614 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5615 res->server_scope->server_scope_sz = dummy;
5616
5617 /* Implementation Id */
5618 p = xdr_inline_decode(xdr, 4);
5619 if (unlikely(!p))
5620 goto out_overflow;
5621 impl_id_count = be32_to_cpup(p++);
5622
5623 if (impl_id_count) {
5624 /* nii_domain */
5625 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5626 if (unlikely(status))
5627 return status;
5628 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5629 return -EIO;
5630 memcpy(res->impl_id->domain, dummy_str, dummy);
5631
5632 /* nii_name */
5633 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5634 if (unlikely(status))
5635 return status;
5636 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5637 return -EIO;
5638 memcpy(res->impl_id->name, dummy_str, dummy);
5639
5640 /* nii_date */
5641 p = xdr_inline_decode(xdr, 12);
5642 if (unlikely(!p))
5643 goto out_overflow;
5644 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5645 res->impl_id->date.nseconds = be32_to_cpup(p);
5646
5647 /* if there's more than one entry, ignore the rest */
5648 }
5649 return 0;
5650 out_overflow:
5651 print_overflow_msg(__func__, xdr);
5652 return -EIO;
5653 }
5654
5655 static int decode_chan_attrs(struct xdr_stream *xdr,
5656 struct nfs4_channel_attrs *attrs)
5657 {
5658 __be32 *p;
5659 u32 nr_attrs, val;
5660
5661 p = xdr_inline_decode(xdr, 28);
5662 if (unlikely(!p))
5663 goto out_overflow;
5664 val = be32_to_cpup(p++); /* headerpadsz */
5665 if (val)
5666 return -EINVAL; /* no support for header padding yet */
5667 attrs->max_rqst_sz = be32_to_cpup(p++);
5668 attrs->max_resp_sz = be32_to_cpup(p++);
5669 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5670 attrs->max_ops = be32_to_cpup(p++);
5671 attrs->max_reqs = be32_to_cpup(p++);
5672 nr_attrs = be32_to_cpup(p);
5673 if (unlikely(nr_attrs > 1)) {
5674 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5675 "count %u\n", __func__, nr_attrs);
5676 return -EINVAL;
5677 }
5678 if (nr_attrs == 1) {
5679 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5680 if (unlikely(!p))
5681 goto out_overflow;
5682 }
5683 return 0;
5684 out_overflow:
5685 print_overflow_msg(__func__, xdr);
5686 return -EIO;
5687 }
5688
5689 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5690 {
5691 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5692 }
5693
5694 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5695 struct nfs41_bind_conn_to_session_res *res)
5696 {
5697 __be32 *p;
5698 int status;
5699
5700 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5701 if (!status)
5702 status = decode_sessionid(xdr, &res->sessionid);
5703 if (unlikely(status))
5704 return status;
5705
5706 /* dir flags, rdma mode bool */
5707 p = xdr_inline_decode(xdr, 8);
5708 if (unlikely(!p))
5709 goto out_overflow;
5710
5711 res->dir = be32_to_cpup(p++);
5712 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5713 return -EIO;
5714 if (be32_to_cpup(p) == 0)
5715 res->use_conn_in_rdma_mode = false;
5716 else
5717 res->use_conn_in_rdma_mode = true;
5718
5719 return 0;
5720 out_overflow:
5721 print_overflow_msg(__func__, xdr);
5722 return -EIO;
5723 }
5724
5725 static int decode_create_session(struct xdr_stream *xdr,
5726 struct nfs41_create_session_res *res)
5727 {
5728 __be32 *p;
5729 int status;
5730
5731 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5732 if (!status)
5733 status = decode_sessionid(xdr, &res->sessionid);
5734 if (unlikely(status))
5735 return status;
5736
5737 /* seqid, flags */
5738 p = xdr_inline_decode(xdr, 8);
5739 if (unlikely(!p))
5740 goto out_overflow;
5741 res->seqid = be32_to_cpup(p++);
5742 res->flags = be32_to_cpup(p);
5743
5744 /* Channel attributes */
5745 status = decode_chan_attrs(xdr, &res->fc_attrs);
5746 if (!status)
5747 status = decode_chan_attrs(xdr, &res->bc_attrs);
5748 return status;
5749 out_overflow:
5750 print_overflow_msg(__func__, xdr);
5751 return -EIO;
5752 }
5753
5754 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5755 {
5756 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5757 }
5758
5759 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5760 {
5761 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5762 }
5763
5764 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5765 {
5766 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5767 }
5768 #endif /* CONFIG_NFS_V4_1 */
5769
5770 static int decode_sequence(struct xdr_stream *xdr,
5771 struct nfs4_sequence_res *res,
5772 struct rpc_rqst *rqstp)
5773 {
5774 #if defined(CONFIG_NFS_V4_1)
5775 struct nfs4_session *session;
5776 struct nfs4_sessionid id;
5777 u32 dummy;
5778 int status;
5779 __be32 *p;
5780
5781 if (res->sr_slot == NULL)
5782 return 0;
5783 if (!res->sr_slot->table->session)
5784 return 0;
5785
5786 status = decode_op_hdr(xdr, OP_SEQUENCE);
5787 if (!status)
5788 status = decode_sessionid(xdr, &id);
5789 if (unlikely(status))
5790 goto out_err;
5791
5792 /*
5793 * If the server returns different values for sessionID, slotID or
5794 * sequence number, the server is looney tunes.
5795 */
5796 status = -EREMOTEIO;
5797 session = res->sr_slot->table->session;
5798
5799 if (memcmp(id.data, session->sess_id.data,
5800 NFS4_MAX_SESSIONID_LEN)) {
5801 dprintk("%s Invalid session id\n", __func__);
5802 goto out_err;
5803 }
5804
5805 p = xdr_inline_decode(xdr, 20);
5806 if (unlikely(!p))
5807 goto out_overflow;
5808
5809 /* seqid */
5810 dummy = be32_to_cpup(p++);
5811 if (dummy != res->sr_slot->seq_nr) {
5812 dprintk("%s Invalid sequence number\n", __func__);
5813 goto out_err;
5814 }
5815 /* slot id */
5816 dummy = be32_to_cpup(p++);
5817 if (dummy != res->sr_slot->slot_nr) {
5818 dprintk("%s Invalid slot id\n", __func__);
5819 goto out_err;
5820 }
5821 /* highest slot id */
5822 res->sr_highest_slotid = be32_to_cpup(p++);
5823 /* target highest slot id */
5824 res->sr_target_highest_slotid = be32_to_cpup(p++);
5825 /* result flags */
5826 res->sr_status_flags = be32_to_cpup(p);
5827 status = 0;
5828 out_err:
5829 res->sr_status = status;
5830 return status;
5831 out_overflow:
5832 print_overflow_msg(__func__, xdr);
5833 status = -EIO;
5834 goto out_err;
5835 #else /* CONFIG_NFS_V4_1 */
5836 return 0;
5837 #endif /* CONFIG_NFS_V4_1 */
5838 }
5839
5840 #if defined(CONFIG_NFS_V4_1)
5841 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5842 struct nfs4_getdeviceinfo_res *res)
5843 {
5844 struct pnfs_device *pdev = res->pdev;
5845 __be32 *p;
5846 uint32_t len, type;
5847 int status;
5848
5849 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5850 if (status) {
5851 if (status == -ETOOSMALL) {
5852 p = xdr_inline_decode(xdr, 4);
5853 if (unlikely(!p))
5854 goto out_overflow;
5855 pdev->mincount = be32_to_cpup(p);
5856 dprintk("%s: Min count too small. mincnt = %u\n",
5857 __func__, pdev->mincount);
5858 }
5859 return status;
5860 }
5861
5862 p = xdr_inline_decode(xdr, 8);
5863 if (unlikely(!p))
5864 goto out_overflow;
5865 type = be32_to_cpup(p++);
5866 if (type != pdev->layout_type) {
5867 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5868 __func__, pdev->layout_type, type);
5869 return -EINVAL;
5870 }
5871 /*
5872 * Get the length of the opaque device_addr4. xdr_read_pages places
5873 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5874 * and places the remaining xdr data in xdr_buf->tail
5875 */
5876 pdev->mincount = be32_to_cpup(p);
5877 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5878 goto out_overflow;
5879
5880 /* Parse notification bitmap, verifying that it is zero. */
5881 p = xdr_inline_decode(xdr, 4);
5882 if (unlikely(!p))
5883 goto out_overflow;
5884 len = be32_to_cpup(p);
5885 if (len) {
5886 uint32_t i;
5887
5888 p = xdr_inline_decode(xdr, 4 * len);
5889 if (unlikely(!p))
5890 goto out_overflow;
5891
5892 res->notification = be32_to_cpup(p++);
5893 for (i = 1; i < len; i++) {
5894 if (be32_to_cpup(p++)) {
5895 dprintk("%s: unsupported notification\n",
5896 __func__);
5897 return -EIO;
5898 }
5899 }
5900 }
5901 return 0;
5902 out_overflow:
5903 print_overflow_msg(__func__, xdr);
5904 return -EIO;
5905 }
5906
5907 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5908 struct nfs4_layoutget_res *res)
5909 {
5910 __be32 *p;
5911 int status;
5912 u32 layout_count;
5913 u32 recvd;
5914
5915 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5916 if (status)
5917 return status;
5918 p = xdr_inline_decode(xdr, 4);
5919 if (unlikely(!p))
5920 goto out_overflow;
5921 res->return_on_close = be32_to_cpup(p);
5922 decode_stateid(xdr, &res->stateid);
5923 p = xdr_inline_decode(xdr, 4);
5924 if (unlikely(!p))
5925 goto out_overflow;
5926 layout_count = be32_to_cpup(p);
5927 if (!layout_count) {
5928 dprintk("%s: server responded with empty layout array\n",
5929 __func__);
5930 return -EINVAL;
5931 }
5932
5933 p = xdr_inline_decode(xdr, 28);
5934 if (unlikely(!p))
5935 goto out_overflow;
5936 p = xdr_decode_hyper(p, &res->range.offset);
5937 p = xdr_decode_hyper(p, &res->range.length);
5938 res->range.iomode = be32_to_cpup(p++);
5939 res->type = be32_to_cpup(p++);
5940 res->layoutp->len = be32_to_cpup(p);
5941
5942 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5943 __func__,
5944 (unsigned long)res->range.offset,
5945 (unsigned long)res->range.length,
5946 res->range.iomode,
5947 res->type,
5948 res->layoutp->len);
5949
5950 recvd = xdr_read_pages(xdr, res->layoutp->len);
5951 if (res->layoutp->len > recvd) {
5952 dprintk("NFS: server cheating in layoutget reply: "
5953 "layout len %u > recvd %u\n",
5954 res->layoutp->len, recvd);
5955 return -EINVAL;
5956 }
5957
5958 if (layout_count > 1) {
5959 /* We only handle a length one array at the moment. Any
5960 * further entries are just ignored. Note that this means
5961 * the client may see a response that is less than the
5962 * minimum it requested.
5963 */
5964 dprintk("%s: server responded with %d layouts, dropping tail\n",
5965 __func__, layout_count);
5966 }
5967
5968 return 0;
5969 out_overflow:
5970 print_overflow_msg(__func__, xdr);
5971 return -EIO;
5972 }
5973
5974 static int decode_layoutreturn(struct xdr_stream *xdr,
5975 struct nfs4_layoutreturn_res *res)
5976 {
5977 __be32 *p;
5978 int status;
5979
5980 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5981 if (status)
5982 return status;
5983 p = xdr_inline_decode(xdr, 4);
5984 if (unlikely(!p))
5985 goto out_overflow;
5986 res->lrs_present = be32_to_cpup(p);
5987 if (res->lrs_present)
5988 status = decode_stateid(xdr, &res->stateid);
5989 return status;
5990 out_overflow:
5991 print_overflow_msg(__func__, xdr);
5992 return -EIO;
5993 }
5994
5995 static int decode_layoutcommit(struct xdr_stream *xdr,
5996 struct rpc_rqst *req,
5997 struct nfs4_layoutcommit_res *res)
5998 {
5999 __be32 *p;
6000 __u32 sizechanged;
6001 int status;
6002
6003 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6004 res->status = status;
6005 if (status)
6006 return status;
6007
6008 p = xdr_inline_decode(xdr, 4);
6009 if (unlikely(!p))
6010 goto out_overflow;
6011 sizechanged = be32_to_cpup(p);
6012
6013 if (sizechanged) {
6014 /* throw away new size */
6015 p = xdr_inline_decode(xdr, 8);
6016 if (unlikely(!p))
6017 goto out_overflow;
6018 }
6019 return 0;
6020 out_overflow:
6021 print_overflow_msg(__func__, xdr);
6022 return -EIO;
6023 }
6024
6025 static int decode_test_stateid(struct xdr_stream *xdr,
6026 struct nfs41_test_stateid_res *res)
6027 {
6028 __be32 *p;
6029 int status;
6030 int num_res;
6031
6032 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6033 if (status)
6034 return status;
6035
6036 p = xdr_inline_decode(xdr, 4);
6037 if (unlikely(!p))
6038 goto out_overflow;
6039 num_res = be32_to_cpup(p++);
6040 if (num_res != 1)
6041 goto out;
6042
6043 p = xdr_inline_decode(xdr, 4);
6044 if (unlikely(!p))
6045 goto out_overflow;
6046 res->status = be32_to_cpup(p++);
6047
6048 return status;
6049 out_overflow:
6050 print_overflow_msg(__func__, xdr);
6051 out:
6052 return -EIO;
6053 }
6054
6055 static int decode_free_stateid(struct xdr_stream *xdr,
6056 struct nfs41_free_stateid_res *res)
6057 {
6058 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6059 return res->status;
6060 }
6061 #endif /* CONFIG_NFS_V4_1 */
6062
6063 /*
6064 * END OF "GENERIC" DECODE ROUTINES.
6065 */
6066
6067 /*
6068 * Decode OPEN_DOWNGRADE response
6069 */
6070 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6071 struct xdr_stream *xdr,
6072 struct nfs_closeres *res)
6073 {
6074 struct compound_hdr hdr;
6075 int status;
6076
6077 status = decode_compound_hdr(xdr, &hdr);
6078 if (status)
6079 goto out;
6080 status = decode_sequence(xdr, &res->seq_res, rqstp);
6081 if (status)
6082 goto out;
6083 status = decode_putfh(xdr);
6084 if (status)
6085 goto out;
6086 status = decode_open_downgrade(xdr, res);
6087 if (status != 0)
6088 goto out;
6089 decode_getfattr(xdr, res->fattr, res->server);
6090 out:
6091 return status;
6092 }
6093
6094 /*
6095 * Decode ACCESS response
6096 */
6097 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6098 struct nfs4_accessres *res)
6099 {
6100 struct compound_hdr hdr;
6101 int status;
6102
6103 status = decode_compound_hdr(xdr, &hdr);
6104 if (status)
6105 goto out;
6106 status = decode_sequence(xdr, &res->seq_res, rqstp);
6107 if (status)
6108 goto out;
6109 status = decode_putfh(xdr);
6110 if (status != 0)
6111 goto out;
6112 status = decode_access(xdr, &res->supported, &res->access);
6113 if (status != 0)
6114 goto out;
6115 decode_getfattr(xdr, res->fattr, res->server);
6116 out:
6117 return status;
6118 }
6119
6120 /*
6121 * Decode LOOKUP response
6122 */
6123 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6124 struct nfs4_lookup_res *res)
6125 {
6126 struct compound_hdr hdr;
6127 int status;
6128
6129 status = decode_compound_hdr(xdr, &hdr);
6130 if (status)
6131 goto out;
6132 status = decode_sequence(xdr, &res->seq_res, rqstp);
6133 if (status)
6134 goto out;
6135 status = decode_putfh(xdr);
6136 if (status)
6137 goto out;
6138 status = decode_lookup(xdr);
6139 if (status)
6140 goto out;
6141 status = decode_getfh(xdr, res->fh);
6142 if (status)
6143 goto out;
6144 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6145 out:
6146 return status;
6147 }
6148
6149 /*
6150 * Decode LOOKUP_ROOT response
6151 */
6152 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6153 struct xdr_stream *xdr,
6154 struct nfs4_lookup_res *res)
6155 {
6156 struct compound_hdr hdr;
6157 int status;
6158
6159 status = decode_compound_hdr(xdr, &hdr);
6160 if (status)
6161 goto out;
6162 status = decode_sequence(xdr, &res->seq_res, rqstp);
6163 if (status)
6164 goto out;
6165 status = decode_putrootfh(xdr);
6166 if (status)
6167 goto out;
6168 status = decode_getfh(xdr, res->fh);
6169 if (status == 0)
6170 status = decode_getfattr_label(xdr, res->fattr,
6171 res->label, res->server);
6172 out:
6173 return status;
6174 }
6175
6176 /*
6177 * Decode REMOVE response
6178 */
6179 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6180 struct nfs_removeres *res)
6181 {
6182 struct compound_hdr hdr;
6183 int status;
6184
6185 status = decode_compound_hdr(xdr, &hdr);
6186 if (status)
6187 goto out;
6188 status = decode_sequence(xdr, &res->seq_res, rqstp);
6189 if (status)
6190 goto out;
6191 status = decode_putfh(xdr);
6192 if (status)
6193 goto out;
6194 status = decode_remove(xdr, &res->cinfo);
6195 out:
6196 return status;
6197 }
6198
6199 /*
6200 * Decode RENAME response
6201 */
6202 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 struct nfs_renameres *res)
6204 {
6205 struct compound_hdr hdr;
6206 int status;
6207
6208 status = decode_compound_hdr(xdr, &hdr);
6209 if (status)
6210 goto out;
6211 status = decode_sequence(xdr, &res->seq_res, rqstp);
6212 if (status)
6213 goto out;
6214 status = decode_putfh(xdr);
6215 if (status)
6216 goto out;
6217 status = decode_savefh(xdr);
6218 if (status)
6219 goto out;
6220 status = decode_putfh(xdr);
6221 if (status)
6222 goto out;
6223 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6224 out:
6225 return status;
6226 }
6227
6228 /*
6229 * Decode LINK response
6230 */
6231 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6232 struct nfs4_link_res *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_link(xdr, &res->cinfo);
6253 if (status)
6254 goto out;
6255 /*
6256 * Note order: OP_LINK leaves the directory as the current
6257 * filehandle.
6258 */
6259 status = decode_restorefh(xdr);
6260 if (status)
6261 goto out;
6262 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6263 out:
6264 return status;
6265 }
6266
6267 /*
6268 * Decode CREATE response
6269 */
6270 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6271 struct nfs4_create_res *res)
6272 {
6273 struct compound_hdr hdr;
6274 int status;
6275
6276 status = decode_compound_hdr(xdr, &hdr);
6277 if (status)
6278 goto out;
6279 status = decode_sequence(xdr, &res->seq_res, rqstp);
6280 if (status)
6281 goto out;
6282 status = decode_putfh(xdr);
6283 if (status)
6284 goto out;
6285 status = decode_create(xdr, &res->dir_cinfo);
6286 if (status)
6287 goto out;
6288 status = decode_getfh(xdr, res->fh);
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 SYMLINK response
6298 */
6299 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300 struct nfs4_create_res *res)
6301 {
6302 return nfs4_xdr_dec_create(rqstp, xdr, res);
6303 }
6304
6305 /*
6306 * Decode GETATTR response
6307 */
6308 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6309 struct nfs4_getattr_res *res)
6310 {
6311 struct compound_hdr hdr;
6312 int status;
6313
6314 status = decode_compound_hdr(xdr, &hdr);
6315 if (status)
6316 goto out;
6317 status = decode_sequence(xdr, &res->seq_res, rqstp);
6318 if (status)
6319 goto out;
6320 status = decode_putfh(xdr);
6321 if (status)
6322 goto out;
6323 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6324 out:
6325 return status;
6326 }
6327
6328 /*
6329 * Encode an SETACL request
6330 */
6331 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6332 struct nfs_setaclargs *args)
6333 {
6334 struct compound_hdr hdr = {
6335 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336 };
6337
6338 encode_compound_hdr(xdr, req, &hdr);
6339 encode_sequence(xdr, &args->seq_args, &hdr);
6340 encode_putfh(xdr, args->fh, &hdr);
6341 encode_setacl(xdr, args, &hdr);
6342 encode_nops(&hdr);
6343 }
6344
6345 /*
6346 * Decode SETACL response
6347 */
6348 static int
6349 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350 struct nfs_setaclres *res)
6351 {
6352 struct compound_hdr hdr;
6353 int status;
6354
6355 status = decode_compound_hdr(xdr, &hdr);
6356 if (status)
6357 goto out;
6358 status = decode_sequence(xdr, &res->seq_res, rqstp);
6359 if (status)
6360 goto out;
6361 status = decode_putfh(xdr);
6362 if (status)
6363 goto out;
6364 status = decode_setattr(xdr);
6365 out:
6366 return status;
6367 }
6368
6369 /*
6370 * Decode GETACL response
6371 */
6372 static int
6373 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374 struct nfs_getaclres *res)
6375 {
6376 struct compound_hdr hdr;
6377 int status;
6378
6379 if (res->acl_scratch != NULL) {
6380 void *p = page_address(res->acl_scratch);
6381 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6382 }
6383 status = decode_compound_hdr(xdr, &hdr);
6384 if (status)
6385 goto out;
6386 status = decode_sequence(xdr, &res->seq_res, rqstp);
6387 if (status)
6388 goto out;
6389 status = decode_putfh(xdr);
6390 if (status)
6391 goto out;
6392 status = decode_getacl(xdr, rqstp, res);
6393
6394 out:
6395 return status;
6396 }
6397
6398 /*
6399 * Decode CLOSE response
6400 */
6401 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6402 struct nfs_closeres *res)
6403 {
6404 struct compound_hdr hdr;
6405 int status;
6406
6407 status = decode_compound_hdr(xdr, &hdr);
6408 if (status)
6409 goto out;
6410 status = decode_sequence(xdr, &res->seq_res, rqstp);
6411 if (status)
6412 goto out;
6413 status = decode_putfh(xdr);
6414 if (status)
6415 goto out;
6416 status = decode_close(xdr, res);
6417 if (status != 0)
6418 goto out;
6419 /*
6420 * Note: Server may do delete on close for this file
6421 * in which case the getattr call will fail with
6422 * an ESTALE error. Shouldn't be a problem,
6423 * though, since fattr->valid will remain unset.
6424 */
6425 decode_getfattr(xdr, res->fattr, res->server);
6426 out:
6427 return status;
6428 }
6429
6430 /*
6431 * Decode OPEN response
6432 */
6433 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6434 struct nfs_openres *res)
6435 {
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 status = decode_open(xdr, res);
6449 if (status)
6450 goto out;
6451 status = decode_getfh(xdr, &res->fh);
6452 if (status)
6453 goto out;
6454 if (res->access_request)
6455 decode_access(xdr, &res->access_supported, &res->access_result);
6456 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6457 out:
6458 return status;
6459 }
6460
6461 /*
6462 * Decode OPEN_CONFIRM response
6463 */
6464 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6465 struct xdr_stream *xdr,
6466 struct nfs_open_confirmres *res)
6467 {
6468 struct compound_hdr hdr;
6469 int status;
6470
6471 status = decode_compound_hdr(xdr, &hdr);
6472 if (status)
6473 goto out;
6474 status = decode_putfh(xdr);
6475 if (status)
6476 goto out;
6477 status = decode_open_confirm(xdr, res);
6478 out:
6479 return status;
6480 }
6481
6482 /*
6483 * Decode OPEN response
6484 */
6485 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6486 struct xdr_stream *xdr,
6487 struct nfs_openres *res)
6488 {
6489 struct compound_hdr hdr;
6490 int status;
6491
6492 status = decode_compound_hdr(xdr, &hdr);
6493 if (status)
6494 goto out;
6495 status = decode_sequence(xdr, &res->seq_res, rqstp);
6496 if (status)
6497 goto out;
6498 status = decode_putfh(xdr);
6499 if (status)
6500 goto out;
6501 status = decode_open(xdr, res);
6502 if (status)
6503 goto out;
6504 if (res->access_request)
6505 decode_access(xdr, &res->access_supported, &res->access_result);
6506 decode_getfattr(xdr, res->f_attr, res->server);
6507 out:
6508 return status;
6509 }
6510
6511 /*
6512 * Decode SETATTR response
6513 */
6514 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6515 struct xdr_stream *xdr,
6516 struct nfs_setattrres *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_setattr(xdr);
6531 if (status)
6532 goto out;
6533 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6534 out:
6535 return status;
6536 }
6537
6538 /*
6539 * Decode LOCK response
6540 */
6541 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6542 struct nfs_lock_res *res)
6543 {
6544 struct compound_hdr hdr;
6545 int status;
6546
6547 status = decode_compound_hdr(xdr, &hdr);
6548 if (status)
6549 goto out;
6550 status = decode_sequence(xdr, &res->seq_res, rqstp);
6551 if (status)
6552 goto out;
6553 status = decode_putfh(xdr);
6554 if (status)
6555 goto out;
6556 status = decode_lock(xdr, res);
6557 out:
6558 return status;
6559 }
6560
6561 /*
6562 * Decode LOCKT response
6563 */
6564 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6565 struct nfs_lockt_res *res)
6566 {
6567 struct compound_hdr hdr;
6568 int status;
6569
6570 status = decode_compound_hdr(xdr, &hdr);
6571 if (status)
6572 goto out;
6573 status = decode_sequence(xdr, &res->seq_res, rqstp);
6574 if (status)
6575 goto out;
6576 status = decode_putfh(xdr);
6577 if (status)
6578 goto out;
6579 status = decode_lockt(xdr, res);
6580 out:
6581 return status;
6582 }
6583
6584 /*
6585 * Decode LOCKU response
6586 */
6587 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6588 struct nfs_locku_res *res)
6589 {
6590 struct compound_hdr hdr;
6591 int status;
6592
6593 status = decode_compound_hdr(xdr, &hdr);
6594 if (status)
6595 goto out;
6596 status = decode_sequence(xdr, &res->seq_res, rqstp);
6597 if (status)
6598 goto out;
6599 status = decode_putfh(xdr);
6600 if (status)
6601 goto out;
6602 status = decode_locku(xdr, res);
6603 out:
6604 return status;
6605 }
6606
6607 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6608 struct xdr_stream *xdr, void *dummy)
6609 {
6610 struct compound_hdr hdr;
6611 int status;
6612
6613 status = decode_compound_hdr(xdr, &hdr);
6614 if (!status)
6615 status = decode_release_lockowner(xdr);
6616 return status;
6617 }
6618
6619 /*
6620 * Decode READLINK response
6621 */
6622 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6623 struct xdr_stream *xdr,
6624 struct nfs4_readlink_res *res)
6625 {
6626 struct compound_hdr hdr;
6627 int status;
6628
6629 status = decode_compound_hdr(xdr, &hdr);
6630 if (status)
6631 goto out;
6632 status = decode_sequence(xdr, &res->seq_res, rqstp);
6633 if (status)
6634 goto out;
6635 status = decode_putfh(xdr);
6636 if (status)
6637 goto out;
6638 status = decode_readlink(xdr, rqstp);
6639 out:
6640 return status;
6641 }
6642
6643 /*
6644 * Decode READDIR response
6645 */
6646 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6647 struct nfs4_readdir_res *res)
6648 {
6649 struct compound_hdr hdr;
6650 int status;
6651
6652 status = decode_compound_hdr(xdr, &hdr);
6653 if (status)
6654 goto out;
6655 status = decode_sequence(xdr, &res->seq_res, rqstp);
6656 if (status)
6657 goto out;
6658 status = decode_putfh(xdr);
6659 if (status)
6660 goto out;
6661 status = decode_readdir(xdr, rqstp, res);
6662 out:
6663 return status;
6664 }
6665
6666 /*
6667 * Decode Read response
6668 */
6669 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6670 struct nfs_pgio_res *res)
6671 {
6672 struct compound_hdr hdr;
6673 int status;
6674
6675 status = decode_compound_hdr(xdr, &hdr);
6676 res->op_status = hdr.status;
6677 if (status)
6678 goto out;
6679 status = decode_sequence(xdr, &res->seq_res, rqstp);
6680 if (status)
6681 goto out;
6682 status = decode_putfh(xdr);
6683 if (status)
6684 goto out;
6685 status = decode_read(xdr, rqstp, res);
6686 if (!status)
6687 status = res->count;
6688 out:
6689 return status;
6690 }
6691
6692 /*
6693 * Decode WRITE response
6694 */
6695 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696 struct nfs_pgio_res *res)
6697 {
6698 struct compound_hdr hdr;
6699 int status;
6700
6701 status = decode_compound_hdr(xdr, &hdr);
6702 res->op_status = hdr.status;
6703 if (status)
6704 goto out;
6705 status = decode_sequence(xdr, &res->seq_res, rqstp);
6706 if (status)
6707 goto out;
6708 status = decode_putfh(xdr);
6709 if (status)
6710 goto out;
6711 status = decode_write(xdr, res);
6712 if (status)
6713 goto out;
6714 if (res->fattr)
6715 decode_getfattr(xdr, res->fattr, res->server);
6716 if (!status)
6717 status = res->count;
6718 out:
6719 return status;
6720 }
6721
6722 /*
6723 * Decode COMMIT response
6724 */
6725 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6726 struct nfs_commitres *res)
6727 {
6728 struct compound_hdr hdr;
6729 int status;
6730
6731 status = decode_compound_hdr(xdr, &hdr);
6732 res->op_status = hdr.status;
6733 if (status)
6734 goto out;
6735 status = decode_sequence(xdr, &res->seq_res, rqstp);
6736 if (status)
6737 goto out;
6738 status = decode_putfh(xdr);
6739 if (status)
6740 goto out;
6741 status = decode_commit(xdr, res);
6742 out:
6743 return status;
6744 }
6745
6746 /*
6747 * Decode FSINFO response
6748 */
6749 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6750 struct nfs4_fsinfo_res *res)
6751 {
6752 struct compound_hdr hdr;
6753 int status;
6754
6755 status = decode_compound_hdr(xdr, &hdr);
6756 if (!status)
6757 status = decode_sequence(xdr, &res->seq_res, req);
6758 if (!status)
6759 status = decode_putfh(xdr);
6760 if (!status)
6761 status = decode_fsinfo(xdr, res->fsinfo);
6762 return status;
6763 }
6764
6765 /*
6766 * Decode PATHCONF response
6767 */
6768 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6769 struct nfs4_pathconf_res *res)
6770 {
6771 struct compound_hdr hdr;
6772 int status;
6773
6774 status = decode_compound_hdr(xdr, &hdr);
6775 if (!status)
6776 status = decode_sequence(xdr, &res->seq_res, req);
6777 if (!status)
6778 status = decode_putfh(xdr);
6779 if (!status)
6780 status = decode_pathconf(xdr, res->pathconf);
6781 return status;
6782 }
6783
6784 /*
6785 * Decode STATFS response
6786 */
6787 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6788 struct nfs4_statfs_res *res)
6789 {
6790 struct compound_hdr hdr;
6791 int status;
6792
6793 status = decode_compound_hdr(xdr, &hdr);
6794 if (!status)
6795 status = decode_sequence(xdr, &res->seq_res, req);
6796 if (!status)
6797 status = decode_putfh(xdr);
6798 if (!status)
6799 status = decode_statfs(xdr, res->fsstat);
6800 return status;
6801 }
6802
6803 /*
6804 * Decode GETATTR_BITMAP response
6805 */
6806 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6807 struct xdr_stream *xdr,
6808 struct nfs4_server_caps_res *res)
6809 {
6810 struct compound_hdr hdr;
6811 int status;
6812
6813 status = decode_compound_hdr(xdr, &hdr);
6814 if (status)
6815 goto out;
6816 status = decode_sequence(xdr, &res->seq_res, req);
6817 if (status)
6818 goto out;
6819 status = decode_putfh(xdr);
6820 if (status)
6821 goto out;
6822 status = decode_server_caps(xdr, res);
6823 out:
6824 return status;
6825 }
6826
6827 /*
6828 * Decode RENEW response
6829 */
6830 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6831 void *__unused)
6832 {
6833 struct compound_hdr hdr;
6834 int status;
6835
6836 status = decode_compound_hdr(xdr, &hdr);
6837 if (!status)
6838 status = decode_renew(xdr);
6839 return status;
6840 }
6841
6842 /*
6843 * Decode SETCLIENTID response
6844 */
6845 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6846 struct xdr_stream *xdr,
6847 struct nfs4_setclientid_res *res)
6848 {
6849 struct compound_hdr hdr;
6850 int status;
6851
6852 status = decode_compound_hdr(xdr, &hdr);
6853 if (!status)
6854 status = decode_setclientid(xdr, res);
6855 return status;
6856 }
6857
6858 /*
6859 * Decode SETCLIENTID_CONFIRM response
6860 */
6861 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6862 struct xdr_stream *xdr)
6863 {
6864 struct compound_hdr hdr;
6865 int status;
6866
6867 status = decode_compound_hdr(xdr, &hdr);
6868 if (!status)
6869 status = decode_setclientid_confirm(xdr);
6870 return status;
6871 }
6872
6873 /*
6874 * Decode DELEGRETURN response
6875 */
6876 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6877 struct xdr_stream *xdr,
6878 struct nfs4_delegreturnres *res)
6879 {
6880 struct compound_hdr hdr;
6881 int status;
6882
6883 status = decode_compound_hdr(xdr, &hdr);
6884 if (status)
6885 goto out;
6886 status = decode_sequence(xdr, &res->seq_res, rqstp);
6887 if (status)
6888 goto out;
6889 status = decode_putfh(xdr);
6890 if (status != 0)
6891 goto out;
6892 status = decode_getfattr(xdr, res->fattr, res->server);
6893 if (status != 0)
6894 goto out;
6895 status = decode_delegreturn(xdr);
6896 out:
6897 return status;
6898 }
6899
6900 /*
6901 * Decode FS_LOCATIONS response
6902 */
6903 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6904 struct xdr_stream *xdr,
6905 struct nfs4_fs_locations_res *res)
6906 {
6907 struct compound_hdr hdr;
6908 int status;
6909
6910 status = decode_compound_hdr(xdr, &hdr);
6911 if (status)
6912 goto out;
6913 status = decode_sequence(xdr, &res->seq_res, req);
6914 if (status)
6915 goto out;
6916 status = decode_putfh(xdr);
6917 if (status)
6918 goto out;
6919 if (res->migration) {
6920 xdr_enter_page(xdr, PAGE_SIZE);
6921 status = decode_getfattr_generic(xdr,
6922 &res->fs_locations->fattr,
6923 NULL, res->fs_locations,
6924 NULL, res->fs_locations->server);
6925 if (status)
6926 goto out;
6927 if (res->renew)
6928 status = decode_renew(xdr);
6929 } else {
6930 status = decode_lookup(xdr);
6931 if (status)
6932 goto out;
6933 xdr_enter_page(xdr, PAGE_SIZE);
6934 status = decode_getfattr_generic(xdr,
6935 &res->fs_locations->fattr,
6936 NULL, res->fs_locations,
6937 NULL, res->fs_locations->server);
6938 }
6939 out:
6940 return status;
6941 }
6942
6943 /*
6944 * Decode SECINFO response
6945 */
6946 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6947 struct xdr_stream *xdr,
6948 struct nfs4_secinfo_res *res)
6949 {
6950 struct compound_hdr hdr;
6951 int status;
6952
6953 status = decode_compound_hdr(xdr, &hdr);
6954 if (status)
6955 goto out;
6956 status = decode_sequence(xdr, &res->seq_res, rqstp);
6957 if (status)
6958 goto out;
6959 status = decode_putfh(xdr);
6960 if (status)
6961 goto out;
6962 status = decode_secinfo(xdr, res);
6963 out:
6964 return status;
6965 }
6966
6967 /*
6968 * Decode FSID_PRESENT response
6969 */
6970 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6971 struct xdr_stream *xdr,
6972 struct nfs4_fsid_present_res *res)
6973 {
6974 struct compound_hdr hdr;
6975 int status;
6976
6977 status = decode_compound_hdr(xdr, &hdr);
6978 if (status)
6979 goto out;
6980 status = decode_sequence(xdr, &res->seq_res, rqstp);
6981 if (status)
6982 goto out;
6983 status = decode_putfh(xdr);
6984 if (status)
6985 goto out;
6986 status = decode_getfh(xdr, res->fh);
6987 if (status)
6988 goto out;
6989 if (res->renew)
6990 status = decode_renew(xdr);
6991 out:
6992 return status;
6993 }
6994
6995 #if defined(CONFIG_NFS_V4_1)
6996 /*
6997 * Decode BIND_CONN_TO_SESSION response
6998 */
6999 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7000 struct xdr_stream *xdr,
7001 void *res)
7002 {
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (!status)
7008 status = decode_bind_conn_to_session(xdr, res);
7009 return status;
7010 }
7011
7012 /*
7013 * Decode EXCHANGE_ID response
7014 */
7015 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7016 struct xdr_stream *xdr,
7017 void *res)
7018 {
7019 struct compound_hdr hdr;
7020 int status;
7021
7022 status = decode_compound_hdr(xdr, &hdr);
7023 if (!status)
7024 status = decode_exchange_id(xdr, res);
7025 return status;
7026 }
7027
7028 /*
7029 * Decode CREATE_SESSION response
7030 */
7031 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7032 struct xdr_stream *xdr,
7033 struct nfs41_create_session_res *res)
7034 {
7035 struct compound_hdr hdr;
7036 int status;
7037
7038 status = decode_compound_hdr(xdr, &hdr);
7039 if (!status)
7040 status = decode_create_session(xdr, res);
7041 return status;
7042 }
7043
7044 /*
7045 * Decode DESTROY_SESSION response
7046 */
7047 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7048 struct xdr_stream *xdr,
7049 void *res)
7050 {
7051 struct compound_hdr hdr;
7052 int status;
7053
7054 status = decode_compound_hdr(xdr, &hdr);
7055 if (!status)
7056 status = decode_destroy_session(xdr, res);
7057 return status;
7058 }
7059
7060 /*
7061 * Decode DESTROY_CLIENTID response
7062 */
7063 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7064 struct xdr_stream *xdr,
7065 void *res)
7066 {
7067 struct compound_hdr hdr;
7068 int status;
7069
7070 status = decode_compound_hdr(xdr, &hdr);
7071 if (!status)
7072 status = decode_destroy_clientid(xdr, res);
7073 return status;
7074 }
7075
7076 /*
7077 * Decode SEQUENCE response
7078 */
7079 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7080 struct xdr_stream *xdr,
7081 struct nfs4_sequence_res *res)
7082 {
7083 struct compound_hdr hdr;
7084 int status;
7085
7086 status = decode_compound_hdr(xdr, &hdr);
7087 if (!status)
7088 status = decode_sequence(xdr, res, rqstp);
7089 return status;
7090 }
7091
7092 /*
7093 * Decode GET_LEASE_TIME response
7094 */
7095 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7096 struct xdr_stream *xdr,
7097 struct nfs4_get_lease_time_res *res)
7098 {
7099 struct compound_hdr hdr;
7100 int status;
7101
7102 status = decode_compound_hdr(xdr, &hdr);
7103 if (!status)
7104 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7105 if (!status)
7106 status = decode_putrootfh(xdr);
7107 if (!status)
7108 status = decode_fsinfo(xdr, res->lr_fsinfo);
7109 return status;
7110 }
7111
7112 /*
7113 * Decode RECLAIM_COMPLETE response
7114 */
7115 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7116 struct xdr_stream *xdr,
7117 struct nfs41_reclaim_complete_res *res)
7118 {
7119 struct compound_hdr hdr;
7120 int status;
7121
7122 status = decode_compound_hdr(xdr, &hdr);
7123 if (!status)
7124 status = decode_sequence(xdr, &res->seq_res, rqstp);
7125 if (!status)
7126 status = decode_reclaim_complete(xdr, NULL);
7127 return status;
7128 }
7129
7130 /*
7131 * Decode GETDEVINFO response
7132 */
7133 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7134 struct xdr_stream *xdr,
7135 struct nfs4_getdeviceinfo_res *res)
7136 {
7137 struct compound_hdr hdr;
7138 int status;
7139
7140 status = decode_compound_hdr(xdr, &hdr);
7141 if (status != 0)
7142 goto out;
7143 status = decode_sequence(xdr, &res->seq_res, rqstp);
7144 if (status != 0)
7145 goto out;
7146 status = decode_getdeviceinfo(xdr, res);
7147 out:
7148 return status;
7149 }
7150
7151 /*
7152 * Decode LAYOUTGET response
7153 */
7154 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7155 struct xdr_stream *xdr,
7156 struct nfs4_layoutget_res *res)
7157 {
7158 struct compound_hdr hdr;
7159 int status;
7160
7161 status = decode_compound_hdr(xdr, &hdr);
7162 if (status)
7163 goto out;
7164 status = decode_sequence(xdr, &res->seq_res, rqstp);
7165 if (status)
7166 goto out;
7167 status = decode_putfh(xdr);
7168 if (status)
7169 goto out;
7170 status = decode_layoutget(xdr, rqstp, res);
7171 out:
7172 return status;
7173 }
7174
7175 /*
7176 * Decode LAYOUTRETURN response
7177 */
7178 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 struct nfs4_layoutreturn_res *res)
7181 {
7182 struct compound_hdr hdr;
7183 int status;
7184
7185 status = decode_compound_hdr(xdr, &hdr);
7186 if (status)
7187 goto out;
7188 status = decode_sequence(xdr, &res->seq_res, rqstp);
7189 if (status)
7190 goto out;
7191 status = decode_putfh(xdr);
7192 if (status)
7193 goto out;
7194 status = decode_layoutreturn(xdr, res);
7195 out:
7196 return status;
7197 }
7198
7199 /*
7200 * Decode LAYOUTCOMMIT response
7201 */
7202 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7203 struct xdr_stream *xdr,
7204 struct nfs4_layoutcommit_res *res)
7205 {
7206 struct compound_hdr hdr;
7207 int status;
7208
7209 status = decode_compound_hdr(xdr, &hdr);
7210 if (status)
7211 goto out;
7212 status = decode_sequence(xdr, &res->seq_res, rqstp);
7213 if (status)
7214 goto out;
7215 status = decode_putfh(xdr);
7216 if (status)
7217 goto out;
7218 status = decode_layoutcommit(xdr, rqstp, res);
7219 if (status)
7220 goto out;
7221 decode_getfattr(xdr, res->fattr, res->server);
7222 out:
7223 return status;
7224 }
7225
7226 /*
7227 * Decode SECINFO_NO_NAME response
7228 */
7229 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7230 struct xdr_stream *xdr,
7231 struct nfs4_secinfo_res *res)
7232 {
7233 struct compound_hdr hdr;
7234 int status;
7235
7236 status = decode_compound_hdr(xdr, &hdr);
7237 if (status)
7238 goto out;
7239 status = decode_sequence(xdr, &res->seq_res, rqstp);
7240 if (status)
7241 goto out;
7242 status = decode_putrootfh(xdr);
7243 if (status)
7244 goto out;
7245 status = decode_secinfo_no_name(xdr, res);
7246 out:
7247 return status;
7248 }
7249
7250 /*
7251 * Decode TEST_STATEID response
7252 */
7253 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7254 struct xdr_stream *xdr,
7255 struct nfs41_test_stateid_res *res)
7256 {
7257 struct compound_hdr hdr;
7258 int status;
7259
7260 status = decode_compound_hdr(xdr, &hdr);
7261 if (status)
7262 goto out;
7263 status = decode_sequence(xdr, &res->seq_res, rqstp);
7264 if (status)
7265 goto out;
7266 status = decode_test_stateid(xdr, res);
7267 out:
7268 return status;
7269 }
7270
7271 /*
7272 * Decode FREE_STATEID response
7273 */
7274 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7275 struct xdr_stream *xdr,
7276 struct nfs41_free_stateid_res *res)
7277 {
7278 struct compound_hdr hdr;
7279 int status;
7280
7281 status = decode_compound_hdr(xdr, &hdr);
7282 if (status)
7283 goto out;
7284 status = decode_sequence(xdr, &res->seq_res, rqstp);
7285 if (status)
7286 goto out;
7287 status = decode_free_stateid(xdr, res);
7288 out:
7289 return status;
7290 }
7291 #endif /* CONFIG_NFS_V4_1 */
7292
7293 /**
7294 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7295 * the local page cache.
7296 * @xdr: XDR stream where entry resides
7297 * @entry: buffer to fill in with entry data
7298 * @plus: boolean indicating whether this should be a readdirplus entry
7299 *
7300 * Returns zero if successful, otherwise a negative errno value is
7301 * returned.
7302 *
7303 * This function is not invoked during READDIR reply decoding, but
7304 * rather whenever an application invokes the getdents(2) system call
7305 * on a directory already in our cache.
7306 */
7307 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7308 int plus)
7309 {
7310 unsigned int savep;
7311 uint32_t bitmap[3] = {0};
7312 uint32_t len;
7313 __be32 *p = xdr_inline_decode(xdr, 4);
7314 if (unlikely(!p))
7315 goto out_overflow;
7316 if (*p == xdr_zero) {
7317 p = xdr_inline_decode(xdr, 4);
7318 if (unlikely(!p))
7319 goto out_overflow;
7320 if (*p == xdr_zero)
7321 return -EAGAIN;
7322 entry->eof = 1;
7323 return -EBADCOOKIE;
7324 }
7325
7326 p = xdr_inline_decode(xdr, 12);
7327 if (unlikely(!p))
7328 goto out_overflow;
7329 entry->prev_cookie = entry->cookie;
7330 p = xdr_decode_hyper(p, &entry->cookie);
7331 entry->len = be32_to_cpup(p);
7332
7333 p = xdr_inline_decode(xdr, entry->len);
7334 if (unlikely(!p))
7335 goto out_overflow;
7336 entry->name = (const char *) p;
7337
7338 /*
7339 * In case the server doesn't return an inode number,
7340 * we fake one here. (We don't use inode number 0,
7341 * since glibc seems to choke on it...)
7342 */
7343 entry->ino = 1;
7344 entry->fattr->valid = 0;
7345
7346 if (decode_attr_bitmap(xdr, bitmap) < 0)
7347 goto out_overflow;
7348
7349 if (decode_attr_length(xdr, &len, &savep) < 0)
7350 goto out_overflow;
7351
7352 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7353 NULL, entry->label, entry->server) < 0)
7354 goto out_overflow;
7355 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7356 entry->ino = entry->fattr->mounted_on_fileid;
7357 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7358 entry->ino = entry->fattr->fileid;
7359
7360 entry->d_type = DT_UNKNOWN;
7361 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7362 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7363
7364 return 0;
7365
7366 out_overflow:
7367 print_overflow_msg(__func__, xdr);
7368 return -EAGAIN;
7369 }
7370
7371 /*
7372 * We need to translate between nfs status return values and
7373 * the local errno values which may not be the same.
7374 */
7375 static struct {
7376 int stat;
7377 int errno;
7378 } nfs_errtbl[] = {
7379 { NFS4_OK, 0 },
7380 { NFS4ERR_PERM, -EPERM },
7381 { NFS4ERR_NOENT, -ENOENT },
7382 { NFS4ERR_IO, -errno_NFSERR_IO},
7383 { NFS4ERR_NXIO, -ENXIO },
7384 { NFS4ERR_ACCESS, -EACCES },
7385 { NFS4ERR_EXIST, -EEXIST },
7386 { NFS4ERR_XDEV, -EXDEV },
7387 { NFS4ERR_NOTDIR, -ENOTDIR },
7388 { NFS4ERR_ISDIR, -EISDIR },
7389 { NFS4ERR_INVAL, -EINVAL },
7390 { NFS4ERR_FBIG, -EFBIG },
7391 { NFS4ERR_NOSPC, -ENOSPC },
7392 { NFS4ERR_ROFS, -EROFS },
7393 { NFS4ERR_MLINK, -EMLINK },
7394 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7395 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7396 { NFS4ERR_DQUOT, -EDQUOT },
7397 { NFS4ERR_STALE, -ESTALE },
7398 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7399 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7400 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7401 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7402 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7403 { NFS4ERR_BADTYPE, -EBADTYPE },
7404 { NFS4ERR_LOCKED, -EAGAIN },
7405 { NFS4ERR_SYMLINK, -ELOOP },
7406 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7407 { NFS4ERR_DEADLOCK, -EDEADLK },
7408 { -1, -EIO }
7409 };
7410
7411 /*
7412 * Convert an NFS error code to a local one.
7413 * This one is used jointly by NFSv2 and NFSv3.
7414 */
7415 static int
7416 nfs4_stat_to_errno(int stat)
7417 {
7418 int i;
7419 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7420 if (nfs_errtbl[i].stat == stat)
7421 return nfs_errtbl[i].errno;
7422 }
7423 if (stat <= 10000 || stat > 10100) {
7424 /* The server is looney tunes. */
7425 return -EREMOTEIO;
7426 }
7427 /* If we cannot translate the error, the recovery routines should
7428 * handle it.
7429 * Note: remaining NFSv4 error codes have values > 10000, so should
7430 * not conflict with native Linux error codes.
7431 */
7432 return -stat;
7433 }
7434
7435 #ifdef CONFIG_NFS_V4_2
7436 #include "nfs42xdr.c"
7437 #endif /* CONFIG_NFS_V4_2 */
7438
7439 #define PROC(proc, argtype, restype) \
7440 [NFSPROC4_CLNT_##proc] = { \
7441 .p_proc = NFSPROC4_COMPOUND, \
7442 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7443 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7444 .p_arglen = NFS4_##argtype##_sz, \
7445 .p_replen = NFS4_##restype##_sz, \
7446 .p_statidx = NFSPROC4_CLNT_##proc, \
7447 .p_name = #proc, \
7448 }
7449
7450 #define STUB(proc) \
7451 [NFSPROC4_CLNT_##proc] = { \
7452 .p_name = #proc, \
7453 }
7454
7455 struct rpc_procinfo nfs4_procedures[] = {
7456 PROC(READ, enc_read, dec_read),
7457 PROC(WRITE, enc_write, dec_write),
7458 PROC(COMMIT, enc_commit, dec_commit),
7459 PROC(OPEN, enc_open, dec_open),
7460 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7461 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7462 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7463 PROC(CLOSE, enc_close, dec_close),
7464 PROC(SETATTR, enc_setattr, dec_setattr),
7465 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7466 PROC(RENEW, enc_renew, dec_renew),
7467 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7468 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7469 PROC(LOCK, enc_lock, dec_lock),
7470 PROC(LOCKT, enc_lockt, dec_lockt),
7471 PROC(LOCKU, enc_locku, dec_locku),
7472 PROC(ACCESS, enc_access, dec_access),
7473 PROC(GETATTR, enc_getattr, dec_getattr),
7474 PROC(LOOKUP, enc_lookup, dec_lookup),
7475 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7476 PROC(REMOVE, enc_remove, dec_remove),
7477 PROC(RENAME, enc_rename, dec_rename),
7478 PROC(LINK, enc_link, dec_link),
7479 PROC(SYMLINK, enc_symlink, dec_symlink),
7480 PROC(CREATE, enc_create, dec_create),
7481 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7482 PROC(STATFS, enc_statfs, dec_statfs),
7483 PROC(READLINK, enc_readlink, dec_readlink),
7484 PROC(READDIR, enc_readdir, dec_readdir),
7485 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7486 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7487 PROC(GETACL, enc_getacl, dec_getacl),
7488 PROC(SETACL, enc_setacl, dec_setacl),
7489 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7490 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7491 PROC(SECINFO, enc_secinfo, dec_secinfo),
7492 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7493 #if defined(CONFIG_NFS_V4_1)
7494 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7495 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7496 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7497 PROC(SEQUENCE, enc_sequence, dec_sequence),
7498 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7499 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7500 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7501 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7502 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7503 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7504 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7505 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7506 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7507 STUB(GETDEVICELIST),
7508 PROC(BIND_CONN_TO_SESSION,
7509 enc_bind_conn_to_session, dec_bind_conn_to_session),
7510 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7511 #endif /* CONFIG_NFS_V4_1 */
7512 #ifdef CONFIG_NFS_V4_2
7513 PROC(SEEK, enc_seek, dec_seek),
7514 PROC(ALLOCATE, enc_allocate, dec_allocate),
7515 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7516 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7517 PROC(CLONE, enc_clone, dec_clone),
7518 #endif /* CONFIG_NFS_V4_2 */
7519 };
7520
7521 const struct rpc_version nfs_version4 = {
7522 .number = 4,
7523 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7524 .procs = nfs4_procedures
7525 };
7526
7527 /*
7528 * Local variables:
7529 * c-basic-offset: 8
7530 * End:
7531 */
Linux with added FPC-III support