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Merge tag 'tty-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 /* clientid */ + \
150 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
151 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
152 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
153 #define encode_setclientid_confirm_maxsz \
154 (op_encode_hdr_maxsz + \
155 3 + (NFS4_VERIFIER_SIZE >> 2))
156 #define decode_setclientid_confirm_maxsz \
157 (op_decode_hdr_maxsz)
158 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
159 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
160 #define encode_share_access_maxsz \
161 (2)
162 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
163 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
164 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
165 #define encode_open_maxsz (op_encode_hdr_maxsz + \
166 2 + encode_share_access_maxsz + 2 + \
167 open_owner_id_maxsz + \
168 encode_opentype_maxsz + \
169 encode_claim_null_maxsz)
170 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
171 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
172 decode_ace_maxsz)
173 #define decode_change_info_maxsz (5)
174 #define decode_open_maxsz (op_decode_hdr_maxsz + \
175 decode_stateid_maxsz + \
176 decode_change_info_maxsz + 1 + \
177 nfs4_fattr_bitmap_maxsz + \
178 decode_delegation_maxsz)
179 #define encode_open_confirm_maxsz \
180 (op_encode_hdr_maxsz + \
181 encode_stateid_maxsz + 1)
182 #define decode_open_confirm_maxsz \
183 (op_decode_hdr_maxsz + \
184 decode_stateid_maxsz)
185 #define encode_open_downgrade_maxsz \
186 (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 1 + \
188 encode_share_access_maxsz)
189 #define decode_open_downgrade_maxsz \
190 (op_decode_hdr_maxsz + \
191 decode_stateid_maxsz)
192 #define encode_close_maxsz (op_encode_hdr_maxsz + \
193 1 + encode_stateid_maxsz)
194 #define decode_close_maxsz (op_decode_hdr_maxsz + \
195 decode_stateid_maxsz)
196 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
197 encode_stateid_maxsz + \
198 encode_attrs_maxsz)
199 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
200 nfs4_fattr_bitmap_maxsz)
201 #define encode_read_maxsz (op_encode_hdr_maxsz + \
202 encode_stateid_maxsz + 3)
203 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
204 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
205 2 + encode_verifier_maxsz + 5 + \
206 nfs4_label_maxsz)
207 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
208 decode_verifier_maxsz)
209 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
210 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
211 #define encode_write_maxsz (op_encode_hdr_maxsz + \
212 encode_stateid_maxsz + 4)
213 #define decode_write_maxsz (op_decode_hdr_maxsz + \
214 2 + decode_verifier_maxsz)
215 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
216 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
217 decode_verifier_maxsz)
218 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
219 nfs4_name_maxsz)
220 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
221 decode_change_info_maxsz)
222 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
223 2 * nfs4_name_maxsz)
224 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
225 decode_change_info_maxsz + \
226 decode_change_info_maxsz)
227 #define encode_link_maxsz (op_encode_hdr_maxsz + \
228 nfs4_name_maxsz)
229 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
230 #define encode_lockowner_maxsz (7)
231 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
232 7 + \
233 1 + encode_stateid_maxsz + 1 + \
234 encode_lockowner_maxsz)
235 #define decode_lock_denied_maxsz \
236 (8 + decode_lockowner_maxsz)
237 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
238 decode_lock_denied_maxsz)
239 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
240 encode_lockowner_maxsz)
241 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
242 decode_lock_denied_maxsz)
243 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
244 encode_stateid_maxsz + \
245 4)
246 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
247 decode_stateid_maxsz)
248 #define encode_release_lockowner_maxsz \
249 (op_encode_hdr_maxsz + \
250 encode_lockowner_maxsz)
251 #define decode_release_lockowner_maxsz \
252 (op_decode_hdr_maxsz)
253 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
254 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
255 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
256 1 + nfs4_name_maxsz + \
257 1 + \
258 nfs4_fattr_maxsz)
259 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
260 #define encode_create_maxsz (op_encode_hdr_maxsz + \
261 1 + 2 + nfs4_name_maxsz + \
262 encode_attrs_maxsz)
263 #define decode_create_maxsz (op_decode_hdr_maxsz + \
264 decode_change_info_maxsz + \
265 nfs4_fattr_bitmap_maxsz)
266 #define encode_statfs_maxsz (encode_getattr_maxsz)
267 #define decode_statfs_maxsz (decode_getattr_maxsz)
268 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
269 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
270 #define encode_getacl_maxsz (encode_getattr_maxsz)
271 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
272 nfs4_fattr_bitmap_maxsz + 1)
273 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
274 encode_stateid_maxsz + 3)
275 #define decode_setacl_maxsz (decode_setattr_maxsz)
276 #define encode_fs_locations_maxsz \
277 (encode_getattr_maxsz)
278 #define decode_fs_locations_maxsz \
279 (0)
280 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
281 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
282
283 #if defined(CONFIG_NFS_V4_1)
284 #define NFS4_MAX_MACHINE_NAME_LEN (64)
285 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
286 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
287
288 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
289 encode_verifier_maxsz + \
290 1 /* co_ownerid.len */ + \
291 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
292 1 /* flags */ + \
293 1 /* spa_how */ + \
294 /* max is SP4_MACH_CRED (for now) */ + \
295 1 + NFS4_OP_MAP_NUM_WORDS + \
296 1 + NFS4_OP_MAP_NUM_WORDS + \
297 1 /* implementation id array of size 1 */ + \
298 1 /* nii_domain */ + \
299 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
300 1 /* nii_name */ + \
301 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
302 3 /* nii_date */)
303 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
304 2 /* eir_clientid */ + \
305 1 /* eir_sequenceid */ + \
306 1 /* eir_flags */ + \
307 1 /* spr_how */ + \
308 /* max is SP4_MACH_CRED (for now) */ + \
309 1 + NFS4_OP_MAP_NUM_WORDS + \
310 1 + NFS4_OP_MAP_NUM_WORDS + \
311 2 /* eir_server_owner.so_minor_id */ + \
312 /* eir_server_owner.so_major_id<> */ \
313 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
314 /* eir_server_scope<> */ \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
316 1 /* eir_server_impl_id array length */ + \
317 1 /* nii_domain */ + \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
319 1 /* nii_name */ + \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
321 3 /* nii_date */)
322 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
323 #define decode_channel_attrs_maxsz (6 + \
324 1 /* ca_rdma_ird.len */ + \
325 1 /* ca_rdma_ird */)
326 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
327 2 /* csa_clientid */ + \
328 1 /* csa_sequence */ + \
329 1 /* csa_flags */ + \
330 encode_channel_attrs_maxsz + \
331 encode_channel_attrs_maxsz + \
332 1 /* csa_cb_program */ + \
333 1 /* csa_sec_parms.len (1) */ + \
334 1 /* cb_secflavor (AUTH_SYS) */ + \
335 1 /* stamp */ + \
336 1 /* machinename.len */ + \
337 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
338 1 /* uid */ + \
339 1 /* gid */ + \
340 1 /* gids.len (0) */)
341 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
342 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
343 1 /* csr_sequence */ + \
344 1 /* csr_flags */ + \
345 decode_channel_attrs_maxsz + \
346 decode_channel_attrs_maxsz)
347 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
348 /* bctsa_sessid */ \
349 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350 1 /* bctsa_dir */ + \
351 1 /* bctsa_use_conn_in_rdma_mode */)
352 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
353 /* bctsr_sessid */ \
354 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
355 1 /* bctsr_dir */ + \
356 1 /* bctsr_use_conn_in_rdma_mode */)
357 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
358 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
359 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
360 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
361 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
362 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
363 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
364 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
365 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
366 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
367 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
368 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
369 1 /* layout type */ + \
370 1 /* maxcount */ + \
371 1 /* bitmap size */ + \
372 1 /* notification bitmap length */ + \
373 1 /* notification bitmap, word 0 */)
374 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
375 1 /* layout type */ + \
376 1 /* opaque devaddr4 length */ + \
377 /* devaddr4 payload is read into page */ \
378 1 /* notification bitmap length */ + \
379 1 /* notification bitmap, word 0 */)
380 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
381 encode_stateid_maxsz)
382 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
383 decode_stateid_maxsz + \
384 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
385 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
386 2 /* offset */ + \
387 2 /* length */ + \
388 1 /* reclaim */ + \
389 encode_stateid_maxsz + \
390 1 /* new offset (true) */ + \
391 2 /* last byte written */ + \
392 1 /* nt_timechanged (false) */ + \
393 1 /* layoutupdate4 layout type */ + \
394 1 /* layoutupdate4 opaqueue len */)
395 /* the actual content of layoutupdate4 should
396 be allocated by drivers and spliced in
397 using xdr_write_pages */
398 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
399 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
400 encode_stateid_maxsz + \
401 1 /* FIXME: opaque lrf_body always empty at the moment */)
402 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
403 1 + decode_stateid_maxsz)
404 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
405 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
406 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
407 XDR_QUADLEN(NFS4_STATEID_SIZE))
408 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
409 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
410 XDR_QUADLEN(NFS4_STATEID_SIZE))
411 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
412 #else /* CONFIG_NFS_V4_1 */
413 #define encode_sequence_maxsz 0
414 #define decode_sequence_maxsz 0
415 #endif /* CONFIG_NFS_V4_1 */
416
417 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
418 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
419 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
420 encode_sequence_maxsz + \
421 encode_putfh_maxsz + \
422 encode_read_maxsz)
423 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
424 decode_sequence_maxsz + \
425 decode_putfh_maxsz + \
426 decode_read_maxsz)
427 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
428 encode_sequence_maxsz + \
429 encode_putfh_maxsz + \
430 encode_readlink_maxsz)
431 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_readlink_maxsz)
435 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
436 encode_sequence_maxsz + \
437 encode_putfh_maxsz + \
438 encode_readdir_maxsz)
439 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
440 decode_sequence_maxsz + \
441 decode_putfh_maxsz + \
442 decode_readdir_maxsz)
443 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
444 encode_sequence_maxsz + \
445 encode_putfh_maxsz + \
446 encode_write_maxsz + \
447 encode_getattr_maxsz)
448 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
449 decode_sequence_maxsz + \
450 decode_putfh_maxsz + \
451 decode_write_maxsz + \
452 decode_getattr_maxsz)
453 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
454 encode_sequence_maxsz + \
455 encode_putfh_maxsz + \
456 encode_commit_maxsz)
457 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
458 decode_sequence_maxsz + \
459 decode_putfh_maxsz + \
460 decode_commit_maxsz)
461 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_open_maxsz + \
465 encode_access_maxsz + \
466 encode_getfh_maxsz + \
467 encode_getattr_maxsz)
468 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
469 decode_sequence_maxsz + \
470 decode_putfh_maxsz + \
471 decode_open_maxsz + \
472 decode_access_maxsz + \
473 decode_getfh_maxsz + \
474 decode_getattr_maxsz)
475 #define NFS4_enc_open_confirm_sz \
476 (compound_encode_hdr_maxsz + \
477 encode_putfh_maxsz + \
478 encode_open_confirm_maxsz)
479 #define NFS4_dec_open_confirm_sz \
480 (compound_decode_hdr_maxsz + \
481 decode_putfh_maxsz + \
482 decode_open_confirm_maxsz)
483 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
484 encode_sequence_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_maxsz + \
487 encode_access_maxsz + \
488 encode_getattr_maxsz)
489 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
490 decode_sequence_maxsz + \
491 decode_putfh_maxsz + \
492 decode_open_maxsz + \
493 decode_access_maxsz + \
494 decode_getattr_maxsz)
495 #define NFS4_enc_open_downgrade_sz \
496 (compound_encode_hdr_maxsz + \
497 encode_sequence_maxsz + \
498 encode_putfh_maxsz + \
499 encode_open_downgrade_maxsz + \
500 encode_getattr_maxsz)
501 #define NFS4_dec_open_downgrade_sz \
502 (compound_decode_hdr_maxsz + \
503 decode_sequence_maxsz + \
504 decode_putfh_maxsz + \
505 decode_open_downgrade_maxsz + \
506 decode_getattr_maxsz)
507 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putfh_maxsz + \
510 encode_close_maxsz + \
511 encode_getattr_maxsz)
512 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_close_maxsz + \
516 decode_getattr_maxsz)
517 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_setattr_maxsz + \
521 encode_getattr_maxsz)
522 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
523 decode_sequence_maxsz + \
524 decode_putfh_maxsz + \
525 decode_setattr_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_fsinfo_maxsz)
531 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_fsinfo_maxsz)
535 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
536 encode_renew_maxsz)
537 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
538 decode_renew_maxsz)
539 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
540 encode_setclientid_maxsz)
541 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
542 decode_setclientid_maxsz)
543 #define NFS4_enc_setclientid_confirm_sz \
544 (compound_encode_hdr_maxsz + \
545 encode_setclientid_confirm_maxsz)
546 #define NFS4_dec_setclientid_confirm_sz \
547 (compound_decode_hdr_maxsz + \
548 decode_setclientid_confirm_maxsz)
549 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
550 encode_sequence_maxsz + \
551 encode_putfh_maxsz + \
552 encode_lock_maxsz)
553 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
554 decode_sequence_maxsz + \
555 decode_putfh_maxsz + \
556 decode_lock_maxsz)
557 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_lockt_maxsz)
561 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_lockt_maxsz)
565 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_locku_maxsz)
569 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_locku_maxsz)
573 #define NFS4_enc_release_lockowner_sz \
574 (compound_encode_hdr_maxsz + \
575 encode_lockowner_maxsz)
576 #define NFS4_dec_release_lockowner_sz \
577 (compound_decode_hdr_maxsz + \
578 decode_lockowner_maxsz)
579 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
580 encode_sequence_maxsz + \
581 encode_putfh_maxsz + \
582 encode_access_maxsz + \
583 encode_getattr_maxsz)
584 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
585 decode_sequence_maxsz + \
586 decode_putfh_maxsz + \
587 decode_access_maxsz + \
588 decode_getattr_maxsz)
589 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
590 encode_sequence_maxsz + \
591 encode_putfh_maxsz + \
592 encode_getattr_maxsz + \
593 encode_renew_maxsz)
594 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_getattr_maxsz + \
598 decode_renew_maxsz)
599 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
600 encode_sequence_maxsz + \
601 encode_putfh_maxsz + \
602 encode_lookup_maxsz + \
603 encode_getattr_maxsz + \
604 encode_getfh_maxsz)
605 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
606 decode_sequence_maxsz + \
607 decode_putfh_maxsz + \
608 decode_lookup_maxsz + \
609 decode_getattr_maxsz + \
610 decode_getfh_maxsz)
611 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
612 encode_sequence_maxsz + \
613 encode_putrootfh_maxsz + \
614 encode_getattr_maxsz + \
615 encode_getfh_maxsz)
616 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
617 decode_sequence_maxsz + \
618 decode_putrootfh_maxsz + \
619 decode_getattr_maxsz + \
620 decode_getfh_maxsz)
621 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
622 encode_sequence_maxsz + \
623 encode_putfh_maxsz + \
624 encode_remove_maxsz)
625 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
626 decode_sequence_maxsz + \
627 decode_putfh_maxsz + \
628 decode_remove_maxsz)
629 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_savefh_maxsz + \
633 encode_putfh_maxsz + \
634 encode_rename_maxsz)
635 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
636 decode_sequence_maxsz + \
637 decode_putfh_maxsz + \
638 decode_savefh_maxsz + \
639 decode_putfh_maxsz + \
640 decode_rename_maxsz)
641 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_savefh_maxsz + \
645 encode_putfh_maxsz + \
646 encode_link_maxsz + \
647 encode_restorefh_maxsz + \
648 encode_getattr_maxsz)
649 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
650 decode_sequence_maxsz + \
651 decode_putfh_maxsz + \
652 decode_savefh_maxsz + \
653 decode_putfh_maxsz + \
654 decode_link_maxsz + \
655 decode_restorefh_maxsz + \
656 decode_getattr_maxsz)
657 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
658 encode_sequence_maxsz + \
659 encode_putfh_maxsz + \
660 encode_symlink_maxsz + \
661 encode_getattr_maxsz + \
662 encode_getfh_maxsz)
663 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
664 decode_sequence_maxsz + \
665 decode_putfh_maxsz + \
666 decode_symlink_maxsz + \
667 decode_getattr_maxsz + \
668 decode_getfh_maxsz)
669 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
670 encode_sequence_maxsz + \
671 encode_putfh_maxsz + \
672 encode_create_maxsz + \
673 encode_getfh_maxsz + \
674 encode_getattr_maxsz)
675 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_create_maxsz + \
679 decode_getfh_maxsz + \
680 decode_getattr_maxsz)
681 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_getattr_maxsz)
685 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
686 decode_sequence_maxsz + \
687 decode_putfh_maxsz + \
688 decode_getattr_maxsz)
689 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
690 encode_sequence_maxsz + \
691 encode_putfh_maxsz + \
692 encode_statfs_maxsz)
693 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_putfh_maxsz + \
696 decode_statfs_maxsz)
697 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_getattr_maxsz)
701 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_getattr_maxsz)
705 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_delegreturn_maxsz + \
709 encode_getattr_maxsz)
710 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
711 decode_sequence_maxsz + \
712 decode_delegreturn_maxsz + \
713 decode_getattr_maxsz)
714 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
715 encode_sequence_maxsz + \
716 encode_putfh_maxsz + \
717 encode_getacl_maxsz)
718 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
719 decode_sequence_maxsz + \
720 decode_putfh_maxsz + \
721 decode_getacl_maxsz)
722 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
723 encode_sequence_maxsz + \
724 encode_putfh_maxsz + \
725 encode_setacl_maxsz)
726 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
727 decode_sequence_maxsz + \
728 decode_putfh_maxsz + \
729 decode_setacl_maxsz)
730 #define NFS4_enc_fs_locations_sz \
731 (compound_encode_hdr_maxsz + \
732 encode_sequence_maxsz + \
733 encode_putfh_maxsz + \
734 encode_lookup_maxsz + \
735 encode_fs_locations_maxsz + \
736 encode_renew_maxsz)
737 #define NFS4_dec_fs_locations_sz \
738 (compound_decode_hdr_maxsz + \
739 decode_sequence_maxsz + \
740 decode_putfh_maxsz + \
741 decode_lookup_maxsz + \
742 decode_fs_locations_maxsz + \
743 decode_renew_maxsz)
744 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
745 encode_sequence_maxsz + \
746 encode_putfh_maxsz + \
747 encode_secinfo_maxsz)
748 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
749 decode_sequence_maxsz + \
750 decode_putfh_maxsz + \
751 decode_secinfo_maxsz)
752 #define NFS4_enc_fsid_present_sz \
753 (compound_encode_hdr_maxsz + \
754 encode_sequence_maxsz + \
755 encode_putfh_maxsz + \
756 encode_getfh_maxsz + \
757 encode_renew_maxsz)
758 #define NFS4_dec_fsid_present_sz \
759 (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_getfh_maxsz + \
763 decode_renew_maxsz)
764 #if defined(CONFIG_NFS_V4_1)
765 #define NFS4_enc_bind_conn_to_session_sz \
766 (compound_encode_hdr_maxsz + \
767 encode_bind_conn_to_session_maxsz)
768 #define NFS4_dec_bind_conn_to_session_sz \
769 (compound_decode_hdr_maxsz + \
770 decode_bind_conn_to_session_maxsz)
771 #define NFS4_enc_exchange_id_sz \
772 (compound_encode_hdr_maxsz + \
773 encode_exchange_id_maxsz)
774 #define NFS4_dec_exchange_id_sz \
775 (compound_decode_hdr_maxsz + \
776 decode_exchange_id_maxsz)
777 #define NFS4_enc_create_session_sz \
778 (compound_encode_hdr_maxsz + \
779 encode_create_session_maxsz)
780 #define NFS4_dec_create_session_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_create_session_maxsz)
783 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
784 encode_destroy_session_maxsz)
785 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
786 decode_destroy_session_maxsz)
787 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
788 encode_destroy_clientid_maxsz)
789 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
790 decode_destroy_clientid_maxsz)
791 #define NFS4_enc_sequence_sz \
792 (compound_decode_hdr_maxsz + \
793 encode_sequence_maxsz)
794 #define NFS4_dec_sequence_sz \
795 (compound_decode_hdr_maxsz + \
796 decode_sequence_maxsz)
797 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
798 encode_sequence_maxsz + \
799 encode_putrootfh_maxsz + \
800 encode_fsinfo_maxsz)
801 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
802 decode_sequence_maxsz + \
803 decode_putrootfh_maxsz + \
804 decode_fsinfo_maxsz)
805 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
806 encode_sequence_maxsz + \
807 encode_reclaim_complete_maxsz)
808 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
809 decode_sequence_maxsz + \
810 decode_reclaim_complete_maxsz)
811 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
812 encode_sequence_maxsz +\
813 encode_getdeviceinfo_maxsz)
814 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
815 decode_sequence_maxsz + \
816 decode_getdeviceinfo_maxsz)
817 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
818 encode_sequence_maxsz + \
819 encode_putfh_maxsz + \
820 encode_layoutget_maxsz)
821 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
822 decode_sequence_maxsz + \
823 decode_putfh_maxsz + \
824 decode_layoutget_maxsz)
825 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
826 encode_sequence_maxsz +\
827 encode_putfh_maxsz + \
828 encode_layoutcommit_maxsz + \
829 encode_getattr_maxsz)
830 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
831 decode_sequence_maxsz + \
832 decode_putfh_maxsz + \
833 decode_layoutcommit_maxsz + \
834 decode_getattr_maxsz)
835 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
836 encode_sequence_maxsz + \
837 encode_putfh_maxsz + \
838 encode_layoutreturn_maxsz)
839 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
840 decode_sequence_maxsz + \
841 decode_putfh_maxsz + \
842 decode_layoutreturn_maxsz)
843 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
844 encode_sequence_maxsz + \
845 encode_putrootfh_maxsz +\
846 encode_secinfo_no_name_maxsz)
847 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
848 decode_sequence_maxsz + \
849 decode_putrootfh_maxsz + \
850 decode_secinfo_no_name_maxsz)
851 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
852 encode_sequence_maxsz + \
853 encode_test_stateid_maxsz)
854 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
855 decode_sequence_maxsz + \
856 decode_test_stateid_maxsz)
857 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
858 encode_sequence_maxsz + \
859 encode_free_stateid_maxsz)
860 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
861 decode_sequence_maxsz + \
862 decode_free_stateid_maxsz)
863
864 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
865 compound_encode_hdr_maxsz +
866 encode_sequence_maxsz +
867 encode_putfh_maxsz +
868 encode_getattr_maxsz) *
869 XDR_UNIT);
870
871 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
872 compound_decode_hdr_maxsz +
873 decode_sequence_maxsz +
874 decode_putfh_maxsz) *
875 XDR_UNIT);
876
877 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
878 compound_decode_hdr_maxsz +
879 decode_sequence_maxsz) *
880 XDR_UNIT);
881 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
882 #endif /* CONFIG_NFS_V4_1 */
883
884 static const umode_t nfs_type2fmt[] = {
885 [NF4BAD] = 0,
886 [NF4REG] = S_IFREG,
887 [NF4DIR] = S_IFDIR,
888 [NF4BLK] = S_IFBLK,
889 [NF4CHR] = S_IFCHR,
890 [NF4LNK] = S_IFLNK,
891 [NF4SOCK] = S_IFSOCK,
892 [NF4FIFO] = S_IFIFO,
893 [NF4ATTRDIR] = 0,
894 [NF4NAMEDATTR] = 0,
895 };
896
897 struct compound_hdr {
898 int32_t status;
899 uint32_t nops;
900 __be32 * nops_p;
901 uint32_t taglen;
902 char * tag;
903 uint32_t replen; /* expected reply words */
904 u32 minorversion;
905 };
906
907 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
908 {
909 __be32 *p = xdr_reserve_space(xdr, nbytes);
910 BUG_ON(!p);
911 return p;
912 }
913
914 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
915 {
916 __be32 *p;
917
918 p = xdr_reserve_space(xdr, len);
919 xdr_encode_opaque_fixed(p, buf, len);
920 }
921
922 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
923 {
924 __be32 *p;
925
926 p = reserve_space(xdr, 4 + len);
927 xdr_encode_opaque(p, str, len);
928 }
929
930 static void encode_uint32(struct xdr_stream *xdr, u32 n)
931 {
932 __be32 *p;
933
934 p = reserve_space(xdr, 4);
935 *p = cpu_to_be32(n);
936 }
937
938 static void encode_uint64(struct xdr_stream *xdr, u64 n)
939 {
940 __be32 *p;
941
942 p = reserve_space(xdr, 8);
943 xdr_encode_hyper(p, n);
944 }
945
946 static void encode_nfs4_seqid(struct xdr_stream *xdr,
947 const struct nfs_seqid *seqid)
948 {
949 encode_uint32(xdr, seqid->sequence->counter);
950 }
951
952 static void encode_compound_hdr(struct xdr_stream *xdr,
953 struct rpc_rqst *req,
954 struct compound_hdr *hdr)
955 {
956 __be32 *p;
957 struct rpc_auth *auth = req->rq_cred->cr_auth;
958
959 /* initialize running count of expected bytes in reply.
960 * NOTE: the replied tag SHOULD be the same is the one sent,
961 * but this is not required as a MUST for the server to do so. */
962 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
963
964 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
965 encode_string(xdr, hdr->taglen, hdr->tag);
966 p = reserve_space(xdr, 8);
967 *p++ = cpu_to_be32(hdr->minorversion);
968 hdr->nops_p = p;
969 *p = cpu_to_be32(hdr->nops);
970 }
971
972 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
973 uint32_t replen,
974 struct compound_hdr *hdr)
975 {
976 encode_uint32(xdr, op);
977 hdr->nops++;
978 hdr->replen += replen;
979 }
980
981 static void encode_nops(struct compound_hdr *hdr)
982 {
983 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
984 *hdr->nops_p = htonl(hdr->nops);
985 }
986
987 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
988 {
989 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
990 }
991
992 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
993 {
994 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
995 }
996
997 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
998 const struct nfs4_label *label,
999 const struct nfs_server *server)
1000 {
1001 char owner_name[IDMAP_NAMESZ];
1002 char owner_group[IDMAP_NAMESZ];
1003 int owner_namelen = 0;
1004 int owner_grouplen = 0;
1005 __be32 *p;
1006 unsigned i;
1007 uint32_t len = 0;
1008 uint32_t bmval_len;
1009 uint32_t bmval[3] = { 0 };
1010
1011 /*
1012 * We reserve enough space to write the entire attribute buffer at once.
1013 * In the worst-case, this would be
1014 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1015 * = 40 bytes, plus any contribution from variable-length fields
1016 * such as owner/group.
1017 */
1018 if (iap->ia_valid & ATTR_SIZE) {
1019 bmval[0] |= FATTR4_WORD0_SIZE;
1020 len += 8;
1021 }
1022 if (iap->ia_valid & ATTR_MODE) {
1023 bmval[1] |= FATTR4_WORD1_MODE;
1024 len += 4;
1025 }
1026 if (iap->ia_valid & ATTR_UID) {
1027 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1028 if (owner_namelen < 0) {
1029 dprintk("nfs: couldn't resolve uid %d to string\n",
1030 from_kuid(&init_user_ns, iap->ia_uid));
1031 /* XXX */
1032 strcpy(owner_name, "nobody");
1033 owner_namelen = sizeof("nobody") - 1;
1034 /* goto out; */
1035 }
1036 bmval[1] |= FATTR4_WORD1_OWNER;
1037 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1038 }
1039 if (iap->ia_valid & ATTR_GID) {
1040 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1041 if (owner_grouplen < 0) {
1042 dprintk("nfs: couldn't resolve gid %d to string\n",
1043 from_kgid(&init_user_ns, iap->ia_gid));
1044 strcpy(owner_group, "nobody");
1045 owner_grouplen = sizeof("nobody") - 1;
1046 /* goto out; */
1047 }
1048 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1049 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1050 }
1051 if (iap->ia_valid & ATTR_ATIME_SET) {
1052 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1053 len += 16;
1054 } else if (iap->ia_valid & ATTR_ATIME) {
1055 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1056 len += 4;
1057 }
1058 if (iap->ia_valid & ATTR_MTIME_SET) {
1059 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1060 len += 16;
1061 } else if (iap->ia_valid & ATTR_MTIME) {
1062 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1063 len += 4;
1064 }
1065 if (label) {
1066 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1067 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1068 }
1069
1070 if (bmval[2] != 0)
1071 bmval_len = 3;
1072 else if (bmval[1] != 0)
1073 bmval_len = 2;
1074 else
1075 bmval_len = 1;
1076
1077 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1078
1079 *p++ = cpu_to_be32(bmval_len);
1080 for (i = 0; i < bmval_len; i++)
1081 *p++ = cpu_to_be32(bmval[i]);
1082 *p++ = cpu_to_be32(len);
1083
1084 if (bmval[0] & FATTR4_WORD0_SIZE)
1085 p = xdr_encode_hyper(p, iap->ia_size);
1086 if (bmval[1] & FATTR4_WORD1_MODE)
1087 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1088 if (bmval[1] & FATTR4_WORD1_OWNER)
1089 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1090 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1091 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1092 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1093 if (iap->ia_valid & ATTR_ATIME_SET) {
1094 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1095 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1096 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1097 } else
1098 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1099 }
1100 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1101 if (iap->ia_valid & ATTR_MTIME_SET) {
1102 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1103 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1104 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1105 } else
1106 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1107 }
1108 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1109 *p++ = cpu_to_be32(label->lfs);
1110 *p++ = cpu_to_be32(label->pi);
1111 *p++ = cpu_to_be32(label->len);
1112 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1113 }
1114
1115 /* out: */
1116 }
1117
1118 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1119 {
1120 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1121 encode_uint32(xdr, access);
1122 }
1123
1124 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1125 {
1126 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1127 encode_nfs4_seqid(xdr, arg->seqid);
1128 encode_nfs4_stateid(xdr, arg->stateid);
1129 }
1130
1131 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1132 {
1133 __be32 *p;
1134
1135 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1136 p = reserve_space(xdr, 12);
1137 p = xdr_encode_hyper(p, args->offset);
1138 *p = cpu_to_be32(args->count);
1139 }
1140
1141 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1142 {
1143 __be32 *p;
1144
1145 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1146 encode_uint32(xdr, create->ftype);
1147
1148 switch (create->ftype) {
1149 case NF4LNK:
1150 p = reserve_space(xdr, 4);
1151 *p = cpu_to_be32(create->u.symlink.len);
1152 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1153 break;
1154
1155 case NF4BLK: case NF4CHR:
1156 p = reserve_space(xdr, 8);
1157 *p++ = cpu_to_be32(create->u.device.specdata1);
1158 *p = cpu_to_be32(create->u.device.specdata2);
1159 break;
1160
1161 default:
1162 break;
1163 }
1164
1165 encode_string(xdr, create->name->len, create->name->name);
1166 encode_attrs(xdr, create->attrs, create->label, create->server);
1167 }
1168
1169 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1170 {
1171 __be32 *p;
1172
1173 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1174 p = reserve_space(xdr, 8);
1175 *p++ = cpu_to_be32(1);
1176 *p = cpu_to_be32(bitmap);
1177 }
1178
1179 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1180 {
1181 __be32 *p;
1182
1183 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1184 p = reserve_space(xdr, 12);
1185 *p++ = cpu_to_be32(2);
1186 *p++ = cpu_to_be32(bm0);
1187 *p = cpu_to_be32(bm1);
1188 }
1189
1190 static void
1191 encode_getattr_three(struct xdr_stream *xdr,
1192 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1193 struct compound_hdr *hdr)
1194 {
1195 __be32 *p;
1196
1197 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1198 if (bm2) {
1199 p = reserve_space(xdr, 16);
1200 *p++ = cpu_to_be32(3);
1201 *p++ = cpu_to_be32(bm0);
1202 *p++ = cpu_to_be32(bm1);
1203 *p = cpu_to_be32(bm2);
1204 } else if (bm1) {
1205 p = reserve_space(xdr, 12);
1206 *p++ = cpu_to_be32(2);
1207 *p++ = cpu_to_be32(bm0);
1208 *p = cpu_to_be32(bm1);
1209 } else {
1210 p = reserve_space(xdr, 8);
1211 *p++ = cpu_to_be32(1);
1212 *p = cpu_to_be32(bm0);
1213 }
1214 }
1215
1216 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1217 {
1218 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1219 bitmask[1] & nfs4_fattr_bitmap[1],
1220 bitmask[2] & nfs4_fattr_bitmap[2],
1221 hdr);
1222 }
1223
1224 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1225 const u32 *open_bitmap,
1226 struct compound_hdr *hdr)
1227 {
1228 encode_getattr_three(xdr,
1229 bitmask[0] & open_bitmap[0],
1230 bitmask[1] & open_bitmap[1],
1231 bitmask[2] & open_bitmap[2],
1232 hdr);
1233 }
1234
1235 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1236 {
1237 encode_getattr_three(xdr,
1238 bitmask[0] & nfs4_fsinfo_bitmap[0],
1239 bitmask[1] & nfs4_fsinfo_bitmap[1],
1240 bitmask[2] & nfs4_fsinfo_bitmap[2],
1241 hdr);
1242 }
1243
1244 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1245 {
1246 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1247 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1248 }
1249
1250 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1251 {
1252 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1253 }
1254
1255 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1256 {
1257 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1258 encode_string(xdr, name->len, name->name);
1259 }
1260
1261 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1262 {
1263 if (fl->fl_type == F_RDLCK)
1264 return block ? NFS4_READW_LT : NFS4_READ_LT;
1265 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1266 }
1267
1268 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1269 {
1270 if (fl->fl_end == OFFSET_MAX)
1271 return ~(uint64_t)0;
1272 return fl->fl_end - fl->fl_start + 1;
1273 }
1274
1275 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1276 {
1277 __be32 *p;
1278
1279 p = reserve_space(xdr, 32);
1280 p = xdr_encode_hyper(p, lowner->clientid);
1281 *p++ = cpu_to_be32(20);
1282 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1283 *p++ = cpu_to_be32(lowner->s_dev);
1284 xdr_encode_hyper(p, lowner->id);
1285 }
1286
1287 /*
1288 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1289 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1290 */
1291 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1292 {
1293 __be32 *p;
1294
1295 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1296 p = reserve_space(xdr, 28);
1297 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1298 *p++ = cpu_to_be32(args->reclaim);
1299 p = xdr_encode_hyper(p, args->fl->fl_start);
1300 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1301 *p = cpu_to_be32(args->new_lock_owner);
1302 if (args->new_lock_owner){
1303 encode_nfs4_seqid(xdr, args->open_seqid);
1304 encode_nfs4_stateid(xdr, args->open_stateid);
1305 encode_nfs4_seqid(xdr, args->lock_seqid);
1306 encode_lockowner(xdr, &args->lock_owner);
1307 }
1308 else {
1309 encode_nfs4_stateid(xdr, args->lock_stateid);
1310 encode_nfs4_seqid(xdr, args->lock_seqid);
1311 }
1312 }
1313
1314 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1315 {
1316 __be32 *p;
1317
1318 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1319 p = reserve_space(xdr, 20);
1320 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1321 p = xdr_encode_hyper(p, args->fl->fl_start);
1322 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1323 encode_lockowner(xdr, &args->lock_owner);
1324 }
1325
1326 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1327 {
1328 __be32 *p;
1329
1330 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1331 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1332 encode_nfs4_seqid(xdr, args->seqid);
1333 encode_nfs4_stateid(xdr, args->stateid);
1334 p = reserve_space(xdr, 16);
1335 p = xdr_encode_hyper(p, args->fl->fl_start);
1336 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 }
1338
1339 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1340 {
1341 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1342 encode_lockowner(xdr, lowner);
1343 }
1344
1345 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1346 {
1347 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1348 encode_string(xdr, name->len, name->name);
1349 }
1350
1351 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1352 {
1353 __be32 *p;
1354
1355 p = reserve_space(xdr, 8);
1356 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1357 case FMODE_READ:
1358 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1359 break;
1360 case FMODE_WRITE:
1361 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1362 break;
1363 case FMODE_READ|FMODE_WRITE:
1364 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1365 break;
1366 default:
1367 *p++ = cpu_to_be32(0);
1368 }
1369 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1370 }
1371
1372 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1373 {
1374 __be32 *p;
1375 /*
1376 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1377 * owner 4 = 32
1378 */
1379 encode_nfs4_seqid(xdr, arg->seqid);
1380 encode_share_access(xdr, arg->fmode);
1381 p = reserve_space(xdr, 36);
1382 p = xdr_encode_hyper(p, arg->clientid);
1383 *p++ = cpu_to_be32(24);
1384 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1385 *p++ = cpu_to_be32(arg->server->s_dev);
1386 *p++ = cpu_to_be32(arg->id.uniquifier);
1387 xdr_encode_hyper(p, arg->id.create_time);
1388 }
1389
1390 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1391 {
1392 struct iattr dummy;
1393 __be32 *p;
1394
1395 p = reserve_space(xdr, 4);
1396 switch(arg->createmode) {
1397 case NFS4_CREATE_UNCHECKED:
1398 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1399 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1400 break;
1401 case NFS4_CREATE_GUARDED:
1402 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1403 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1404 break;
1405 case NFS4_CREATE_EXCLUSIVE:
1406 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1407 encode_nfs4_verifier(xdr, &arg->u.verifier);
1408 break;
1409 case NFS4_CREATE_EXCLUSIVE4_1:
1410 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1411 encode_nfs4_verifier(xdr, &arg->u.verifier);
1412 dummy.ia_valid = 0;
1413 encode_attrs(xdr, &dummy, arg->label, arg->server);
1414 }
1415 }
1416
1417 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419 __be32 *p;
1420
1421 p = reserve_space(xdr, 4);
1422 switch (arg->open_flags & O_CREAT) {
1423 case 0:
1424 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1425 break;
1426 default:
1427 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1428 encode_createmode(xdr, arg);
1429 }
1430 }
1431
1432 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1433 {
1434 __be32 *p;
1435
1436 p = reserve_space(xdr, 4);
1437 switch (delegation_type) {
1438 case 0:
1439 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1440 break;
1441 case FMODE_READ:
1442 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1443 break;
1444 case FMODE_WRITE|FMODE_READ:
1445 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1446 break;
1447 default:
1448 BUG();
1449 }
1450 }
1451
1452 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1453 {
1454 __be32 *p;
1455
1456 p = reserve_space(xdr, 4);
1457 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1458 encode_string(xdr, name->len, name->name);
1459 }
1460
1461 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1462 {
1463 __be32 *p;
1464
1465 p = reserve_space(xdr, 4);
1466 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1467 encode_delegation_type(xdr, type);
1468 }
1469
1470 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1471 {
1472 __be32 *p;
1473
1474 p = reserve_space(xdr, 4);
1475 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1476 encode_nfs4_stateid(xdr, stateid);
1477 encode_string(xdr, name->len, name->name);
1478 }
1479
1480 static inline void encode_claim_fh(struct xdr_stream *xdr)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1486 }
1487
1488 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1489 {
1490 __be32 *p;
1491
1492 p = reserve_space(xdr, 4);
1493 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1494 encode_nfs4_stateid(xdr, stateid);
1495 }
1496
1497 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1498 {
1499 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1500 encode_openhdr(xdr, arg);
1501 encode_opentype(xdr, arg);
1502 switch (arg->claim) {
1503 case NFS4_OPEN_CLAIM_NULL:
1504 encode_claim_null(xdr, arg->name);
1505 break;
1506 case NFS4_OPEN_CLAIM_PREVIOUS:
1507 encode_claim_previous(xdr, arg->u.delegation_type);
1508 break;
1509 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1510 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1511 break;
1512 case NFS4_OPEN_CLAIM_FH:
1513 encode_claim_fh(xdr);
1514 break;
1515 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1516 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1517 break;
1518 default:
1519 BUG();
1520 }
1521 }
1522
1523 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1524 {
1525 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1526 encode_nfs4_stateid(xdr, arg->stateid);
1527 encode_nfs4_seqid(xdr, arg->seqid);
1528 }
1529
1530 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1531 {
1532 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1533 encode_nfs4_stateid(xdr, arg->stateid);
1534 encode_nfs4_seqid(xdr, arg->seqid);
1535 encode_share_access(xdr, arg->fmode);
1536 }
1537
1538 static void
1539 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1540 {
1541 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1542 encode_string(xdr, fh->size, fh->data);
1543 }
1544
1545 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1546 {
1547 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1548 }
1549
1550 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1551 struct compound_hdr *hdr)
1552 {
1553 __be32 *p;
1554
1555 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1556 encode_nfs4_stateid(xdr, &args->stateid);
1557
1558 p = reserve_space(xdr, 12);
1559 p = xdr_encode_hyper(p, args->offset);
1560 *p = cpu_to_be32(args->count);
1561 }
1562
1563 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1564 {
1565 uint32_t attrs[3] = {
1566 FATTR4_WORD0_RDATTR_ERROR,
1567 FATTR4_WORD1_MOUNTED_ON_FILEID,
1568 };
1569 uint32_t dircount = readdir->count >> 1;
1570 __be32 *p, verf[2];
1571 uint32_t attrlen = 0;
1572 unsigned int i;
1573
1574 if (readdir->plus) {
1575 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1576 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1577 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1578 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1579 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1580 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1581 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1582 dircount >>= 1;
1583 }
1584 /* Use mounted_on_fileid only if the server supports it */
1585 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1586 attrs[0] |= FATTR4_WORD0_FILEID;
1587 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1588 attrs[i] &= readdir->bitmask[i];
1589 if (attrs[i] != 0)
1590 attrlen = i+1;
1591 }
1592
1593 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1594 encode_uint64(xdr, readdir->cookie);
1595 encode_nfs4_verifier(xdr, &readdir->verifier);
1596 p = reserve_space(xdr, 12 + (attrlen << 2));
1597 *p++ = cpu_to_be32(dircount);
1598 *p++ = cpu_to_be32(readdir->count);
1599 *p++ = cpu_to_be32(attrlen);
1600 for (i = 0; i < attrlen; i++)
1601 *p++ = cpu_to_be32(attrs[i]);
1602 memcpy(verf, readdir->verifier.data, sizeof(verf));
1603
1604 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1605 __func__,
1606 (unsigned long long)readdir->cookie,
1607 verf[0], verf[1],
1608 attrs[0] & readdir->bitmask[0],
1609 attrs[1] & readdir->bitmask[1],
1610 attrs[2] & readdir->bitmask[2]);
1611 }
1612
1613 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1614 {
1615 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1616 }
1617
1618 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1619 {
1620 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1621 encode_string(xdr, name->len, name->name);
1622 }
1623
1624 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1625 {
1626 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1627 encode_string(xdr, oldname->len, oldname->name);
1628 encode_string(xdr, newname->len, newname->name);
1629 }
1630
1631 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1632 struct compound_hdr *hdr)
1633 {
1634 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1635 encode_uint64(xdr, clid);
1636 }
1637
1638 static void
1639 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1640 {
1641 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1642 }
1643
1644 static void
1645 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1646 {
1647 __be32 *p;
1648
1649 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1650 encode_nfs4_stateid(xdr, &zero_stateid);
1651 p = reserve_space(xdr, 2*4);
1652 *p++ = cpu_to_be32(1);
1653 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1654 p = reserve_space(xdr, 4);
1655 *p = cpu_to_be32(arg->acl_len);
1656 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1657 }
1658
1659 static void
1660 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1661 {
1662 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1663 }
1664
1665 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1666 {
1667 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1668 encode_nfs4_stateid(xdr, &arg->stateid);
1669 encode_attrs(xdr, arg->iap, arg->label, server);
1670 }
1671
1672 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1673 {
1674 __be32 *p;
1675
1676 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1677 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1678
1679 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1680 p = reserve_space(xdr, 4);
1681 *p = cpu_to_be32(setclientid->sc_prog);
1682 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1683 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1684 p = reserve_space(xdr, 4);
1685 *p = cpu_to_be32(setclientid->sc_cb_ident);
1686 }
1687
1688 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1689 {
1690 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1691 decode_setclientid_confirm_maxsz, hdr);
1692 encode_uint64(xdr, arg->clientid);
1693 encode_nfs4_verifier(xdr, &arg->confirm);
1694 }
1695
1696 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1697 struct compound_hdr *hdr)
1698 {
1699 __be32 *p;
1700
1701 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1702 encode_nfs4_stateid(xdr, &args->stateid);
1703
1704 p = reserve_space(xdr, 16);
1705 p = xdr_encode_hyper(p, args->offset);
1706 *p++ = cpu_to_be32(args->stable);
1707 *p = cpu_to_be32(args->count);
1708
1709 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1710 }
1711
1712 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1713 {
1714 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1715 encode_nfs4_stateid(xdr, stateid);
1716 }
1717
1718 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1719 {
1720 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1721 encode_string(xdr, name->len, name->name);
1722 }
1723
1724 #if defined(CONFIG_NFS_V4_1)
1725 /* NFSv4.1 operations */
1726 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1727 struct nfs4_session *session,
1728 struct compound_hdr *hdr)
1729 {
1730 __be32 *p;
1731
1732 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1733 decode_bind_conn_to_session_maxsz, hdr);
1734 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1735 p = xdr_reserve_space(xdr, 8);
1736 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1737 *p = 0; /* use_conn_in_rdma_mode = False */
1738 }
1739
1740 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1741 {
1742 unsigned int i;
1743 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1744 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1745 encode_uint32(xdr, op_map->u.words[i]);
1746 }
1747
1748 static void encode_exchange_id(struct xdr_stream *xdr,
1749 struct nfs41_exchange_id_args *args,
1750 struct compound_hdr *hdr)
1751 {
1752 __be32 *p;
1753 char impl_name[IMPL_NAME_LIMIT];
1754 int len = 0;
1755
1756 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1757 encode_nfs4_verifier(xdr, args->verifier);
1758
1759 encode_string(xdr, args->id_len, args->id);
1760
1761 encode_uint32(xdr, args->flags);
1762 encode_uint32(xdr, args->state_protect.how);
1763
1764 switch (args->state_protect.how) {
1765 case SP4_NONE:
1766 break;
1767 case SP4_MACH_CRED:
1768 encode_op_map(xdr, &args->state_protect.enforce);
1769 encode_op_map(xdr, &args->state_protect.allow);
1770 break;
1771 default:
1772 WARN_ON_ONCE(1);
1773 break;
1774 }
1775
1776 if (send_implementation_id &&
1777 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1778 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1779 <= sizeof(impl_name) + 1)
1780 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1781 utsname()->sysname, utsname()->release,
1782 utsname()->version, utsname()->machine);
1783
1784 if (len > 0) {
1785 encode_uint32(xdr, 1); /* implementation id array length=1 */
1786
1787 encode_string(xdr,
1788 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1789 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1790 encode_string(xdr, len, impl_name);
1791 /* just send zeros for nii_date - the date is in nii_name */
1792 p = reserve_space(xdr, 12);
1793 p = xdr_encode_hyper(p, 0);
1794 *p = cpu_to_be32(0);
1795 } else
1796 encode_uint32(xdr, 0); /* implementation id array length=0 */
1797 }
1798
1799 static void encode_create_session(struct xdr_stream *xdr,
1800 struct nfs41_create_session_args *args,
1801 struct compound_hdr *hdr)
1802 {
1803 __be32 *p;
1804 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1805 uint32_t len;
1806 struct nfs_client *clp = args->client;
1807 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1808 u32 max_resp_sz_cached;
1809
1810 /*
1811 * Assumes OPEN is the biggest non-idempotent compound.
1812 * 2 is the verifier.
1813 */
1814 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1815 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1816
1817 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1818 clp->cl_ipaddr);
1819
1820 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1821 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1822 p = xdr_encode_hyper(p, clp->cl_clientid);
1823 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1824 *p++ = cpu_to_be32(args->flags); /*flags */
1825
1826 /* Fore Channel */
1827 *p++ = cpu_to_be32(0); /* header padding size */
1828 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1829 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1830 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1831 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1832 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1833 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1834
1835 /* Back Channel */
1836 *p++ = cpu_to_be32(0); /* header padding size */
1837 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1838 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1839 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1840 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1841 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1842 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1843
1844 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1845 *p++ = cpu_to_be32(1);
1846 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1847
1848 /* authsys_parms rfc1831 */
1849 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1850 p = xdr_encode_opaque(p, machine_name, len);
1851 *p++ = cpu_to_be32(0); /* UID */
1852 *p++ = cpu_to_be32(0); /* GID */
1853 *p = cpu_to_be32(0); /* No more gids */
1854 }
1855
1856 static void encode_destroy_session(struct xdr_stream *xdr,
1857 struct nfs4_session *session,
1858 struct compound_hdr *hdr)
1859 {
1860 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1861 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1862 }
1863
1864 static void encode_destroy_clientid(struct xdr_stream *xdr,
1865 uint64_t clientid,
1866 struct compound_hdr *hdr)
1867 {
1868 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1869 encode_uint64(xdr, clientid);
1870 }
1871
1872 static void encode_reclaim_complete(struct xdr_stream *xdr,
1873 struct nfs41_reclaim_complete_args *args,
1874 struct compound_hdr *hdr)
1875 {
1876 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1877 encode_uint32(xdr, args->one_fs);
1878 }
1879 #endif /* CONFIG_NFS_V4_1 */
1880
1881 static void encode_sequence(struct xdr_stream *xdr,
1882 const struct nfs4_sequence_args *args,
1883 struct compound_hdr *hdr)
1884 {
1885 #if defined(CONFIG_NFS_V4_1)
1886 struct nfs4_session *session;
1887 struct nfs4_slot_table *tp;
1888 struct nfs4_slot *slot = args->sa_slot;
1889 __be32 *p;
1890
1891 tp = slot->table;
1892 session = tp->session;
1893 if (!session)
1894 return;
1895
1896 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1897
1898 /*
1899 * Sessionid + seqid + slotid + max slotid + cache_this
1900 */
1901 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1902 "max_slotid=%d cache_this=%d\n",
1903 __func__,
1904 ((u32 *)session->sess_id.data)[0],
1905 ((u32 *)session->sess_id.data)[1],
1906 ((u32 *)session->sess_id.data)[2],
1907 ((u32 *)session->sess_id.data)[3],
1908 slot->seq_nr, slot->slot_nr,
1909 tp->highest_used_slotid, args->sa_cache_this);
1910 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1911 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1912 *p++ = cpu_to_be32(slot->seq_nr);
1913 *p++ = cpu_to_be32(slot->slot_nr);
1914 *p++ = cpu_to_be32(tp->highest_used_slotid);
1915 *p = cpu_to_be32(args->sa_cache_this);
1916 #endif /* CONFIG_NFS_V4_1 */
1917 }
1918
1919 #ifdef CONFIG_NFS_V4_1
1920 static void
1921 encode_getdeviceinfo(struct xdr_stream *xdr,
1922 const struct nfs4_getdeviceinfo_args *args,
1923 struct compound_hdr *hdr)
1924 {
1925 __be32 *p;
1926
1927 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1928 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1929 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1930 NFS4_DEVICEID4_SIZE);
1931 *p++ = cpu_to_be32(args->pdev->layout_type);
1932 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1933
1934 p = reserve_space(xdr, 4 + 4);
1935 *p++ = cpu_to_be32(1); /* bitmap length */
1936 *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1937 }
1938
1939 static void
1940 encode_layoutget(struct xdr_stream *xdr,
1941 const struct nfs4_layoutget_args *args,
1942 struct compound_hdr *hdr)
1943 {
1944 __be32 *p;
1945
1946 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1947 p = reserve_space(xdr, 36);
1948 *p++ = cpu_to_be32(0); /* Signal layout available */
1949 *p++ = cpu_to_be32(args->type);
1950 *p++ = cpu_to_be32(args->range.iomode);
1951 p = xdr_encode_hyper(p, args->range.offset);
1952 p = xdr_encode_hyper(p, args->range.length);
1953 p = xdr_encode_hyper(p, args->minlength);
1954 encode_nfs4_stateid(xdr, &args->stateid);
1955 encode_uint32(xdr, args->maxcount);
1956
1957 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1958 __func__,
1959 args->type,
1960 args->range.iomode,
1961 (unsigned long)args->range.offset,
1962 (unsigned long)args->range.length,
1963 args->maxcount);
1964 }
1965
1966 static int
1967 encode_layoutcommit(struct xdr_stream *xdr,
1968 struct inode *inode,
1969 struct nfs4_layoutcommit_args *args,
1970 struct compound_hdr *hdr)
1971 {
1972 __be32 *p;
1973
1974 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1975 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1976
1977 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1978 p = reserve_space(xdr, 20);
1979 /* Only whole file layouts */
1980 p = xdr_encode_hyper(p, 0); /* offset */
1981 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1982 *p = cpu_to_be32(0); /* reclaim */
1983 encode_nfs4_stateid(xdr, &args->stateid);
1984 p = reserve_space(xdr, 20);
1985 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1986 p = xdr_encode_hyper(p, args->lastbytewritten);
1987 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1988 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1989
1990 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1991 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1992 NFS_I(inode)->layout, xdr, args);
1993 } else {
1994 encode_uint32(xdr, args->layoutupdate_len);
1995 if (args->layoutupdate_pages) {
1996 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1997 args->layoutupdate_len);
1998 }
1999 }
2000
2001 return 0;
2002 }
2003
2004 static void
2005 encode_layoutreturn(struct xdr_stream *xdr,
2006 const struct nfs4_layoutreturn_args *args,
2007 struct compound_hdr *hdr)
2008 {
2009 __be32 *p;
2010
2011 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2012 p = reserve_space(xdr, 16);
2013 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2014 *p++ = cpu_to_be32(args->layout_type);
2015 *p++ = cpu_to_be32(IOMODE_ANY);
2016 *p = cpu_to_be32(RETURN_FILE);
2017 p = reserve_space(xdr, 16);
2018 p = xdr_encode_hyper(p, 0);
2019 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2020 spin_lock(&args->inode->i_lock);
2021 encode_nfs4_stateid(xdr, &args->stateid);
2022 spin_unlock(&args->inode->i_lock);
2023 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2024 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2025 NFS_I(args->inode)->layout, xdr, args);
2026 } else
2027 encode_uint32(xdr, 0);
2028 }
2029
2030 static int
2031 encode_secinfo_no_name(struct xdr_stream *xdr,
2032 const struct nfs41_secinfo_no_name_args *args,
2033 struct compound_hdr *hdr)
2034 {
2035 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2036 encode_uint32(xdr, args->style);
2037 return 0;
2038 }
2039
2040 static void encode_test_stateid(struct xdr_stream *xdr,
2041 struct nfs41_test_stateid_args *args,
2042 struct compound_hdr *hdr)
2043 {
2044 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2045 encode_uint32(xdr, 1);
2046 encode_nfs4_stateid(xdr, args->stateid);
2047 }
2048
2049 static void encode_free_stateid(struct xdr_stream *xdr,
2050 struct nfs41_free_stateid_args *args,
2051 struct compound_hdr *hdr)
2052 {
2053 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2054 encode_nfs4_stateid(xdr, &args->stateid);
2055 }
2056 #endif /* CONFIG_NFS_V4_1 */
2057
2058 /*
2059 * END OF "GENERIC" ENCODE ROUTINES.
2060 */
2061
2062 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2063 {
2064 #if defined(CONFIG_NFS_V4_1)
2065 struct nfs4_session *session = args->sa_slot->table->session;
2066 if (session)
2067 return session->clp->cl_mvops->minor_version;
2068 #endif /* CONFIG_NFS_V4_1 */
2069 return 0;
2070 }
2071
2072 /*
2073 * Encode an ACCESS request
2074 */
2075 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2076 const struct nfs4_accessargs *args)
2077 {
2078 struct compound_hdr hdr = {
2079 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080 };
2081
2082 encode_compound_hdr(xdr, req, &hdr);
2083 encode_sequence(xdr, &args->seq_args, &hdr);
2084 encode_putfh(xdr, args->fh, &hdr);
2085 encode_access(xdr, args->access, &hdr);
2086 encode_getfattr(xdr, args->bitmask, &hdr);
2087 encode_nops(&hdr);
2088 }
2089
2090 /*
2091 * Encode LOOKUP request
2092 */
2093 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2094 const struct nfs4_lookup_arg *args)
2095 {
2096 struct compound_hdr hdr = {
2097 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098 };
2099
2100 encode_compound_hdr(xdr, req, &hdr);
2101 encode_sequence(xdr, &args->seq_args, &hdr);
2102 encode_putfh(xdr, args->dir_fh, &hdr);
2103 encode_lookup(xdr, args->name, &hdr);
2104 encode_getfh(xdr, &hdr);
2105 encode_getfattr(xdr, args->bitmask, &hdr);
2106 encode_nops(&hdr);
2107 }
2108
2109 /*
2110 * Encode LOOKUP_ROOT request
2111 */
2112 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2113 struct xdr_stream *xdr,
2114 const struct nfs4_lookup_root_arg *args)
2115 {
2116 struct compound_hdr hdr = {
2117 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118 };
2119
2120 encode_compound_hdr(xdr, req, &hdr);
2121 encode_sequence(xdr, &args->seq_args, &hdr);
2122 encode_putrootfh(xdr, &hdr);
2123 encode_getfh(xdr, &hdr);
2124 encode_getfattr(xdr, args->bitmask, &hdr);
2125 encode_nops(&hdr);
2126 }
2127
2128 /*
2129 * Encode REMOVE request
2130 */
2131 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2132 const struct nfs_removeargs *args)
2133 {
2134 struct compound_hdr hdr = {
2135 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136 };
2137
2138 encode_compound_hdr(xdr, req, &hdr);
2139 encode_sequence(xdr, &args->seq_args, &hdr);
2140 encode_putfh(xdr, args->fh, &hdr);
2141 encode_remove(xdr, &args->name, &hdr);
2142 encode_nops(&hdr);
2143 }
2144
2145 /*
2146 * Encode RENAME request
2147 */
2148 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2149 const struct nfs_renameargs *args)
2150 {
2151 struct compound_hdr hdr = {
2152 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153 };
2154
2155 encode_compound_hdr(xdr, req, &hdr);
2156 encode_sequence(xdr, &args->seq_args, &hdr);
2157 encode_putfh(xdr, args->old_dir, &hdr);
2158 encode_savefh(xdr, &hdr);
2159 encode_putfh(xdr, args->new_dir, &hdr);
2160 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2161 encode_nops(&hdr);
2162 }
2163
2164 /*
2165 * Encode LINK request
2166 */
2167 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2168 const struct nfs4_link_arg *args)
2169 {
2170 struct compound_hdr hdr = {
2171 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172 };
2173
2174 encode_compound_hdr(xdr, req, &hdr);
2175 encode_sequence(xdr, &args->seq_args, &hdr);
2176 encode_putfh(xdr, args->fh, &hdr);
2177 encode_savefh(xdr, &hdr);
2178 encode_putfh(xdr, args->dir_fh, &hdr);
2179 encode_link(xdr, args->name, &hdr);
2180 encode_restorefh(xdr, &hdr);
2181 encode_getfattr(xdr, args->bitmask, &hdr);
2182 encode_nops(&hdr);
2183 }
2184
2185 /*
2186 * Encode CREATE request
2187 */
2188 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2189 const struct nfs4_create_arg *args)
2190 {
2191 struct compound_hdr hdr = {
2192 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193 };
2194
2195 encode_compound_hdr(xdr, req, &hdr);
2196 encode_sequence(xdr, &args->seq_args, &hdr);
2197 encode_putfh(xdr, args->dir_fh, &hdr);
2198 encode_create(xdr, args, &hdr);
2199 encode_getfh(xdr, &hdr);
2200 encode_getfattr(xdr, args->bitmask, &hdr);
2201 encode_nops(&hdr);
2202 }
2203
2204 /*
2205 * Encode SYMLINK request
2206 */
2207 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2208 const struct nfs4_create_arg *args)
2209 {
2210 nfs4_xdr_enc_create(req, xdr, args);
2211 }
2212
2213 /*
2214 * Encode GETATTR request
2215 */
2216 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2217 const struct nfs4_getattr_arg *args)
2218 {
2219 struct compound_hdr hdr = {
2220 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221 };
2222
2223 encode_compound_hdr(xdr, req, &hdr);
2224 encode_sequence(xdr, &args->seq_args, &hdr);
2225 encode_putfh(xdr, args->fh, &hdr);
2226 encode_getfattr(xdr, args->bitmask, &hdr);
2227 encode_nops(&hdr);
2228 }
2229
2230 /*
2231 * Encode a CLOSE request
2232 */
2233 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2234 struct nfs_closeargs *args)
2235 {
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->fh, &hdr);
2243 encode_close(xdr, args, &hdr);
2244 encode_getfattr(xdr, args->bitmask, &hdr);
2245 encode_nops(&hdr);
2246 }
2247
2248 /*
2249 * Encode an OPEN request
2250 */
2251 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2252 struct nfs_openargs *args)
2253 {
2254 struct compound_hdr hdr = {
2255 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256 };
2257
2258 encode_compound_hdr(xdr, req, &hdr);
2259 encode_sequence(xdr, &args->seq_args, &hdr);
2260 encode_putfh(xdr, args->fh, &hdr);
2261 encode_open(xdr, args, &hdr);
2262 encode_getfh(xdr, &hdr);
2263 if (args->access)
2264 encode_access(xdr, args->access, &hdr);
2265 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2266 encode_nops(&hdr);
2267 }
2268
2269 /*
2270 * Encode an OPEN_CONFIRM request
2271 */
2272 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2273 struct xdr_stream *xdr,
2274 struct nfs_open_confirmargs *args)
2275 {
2276 struct compound_hdr hdr = {
2277 .nops = 0,
2278 };
2279
2280 encode_compound_hdr(xdr, req, &hdr);
2281 encode_putfh(xdr, args->fh, &hdr);
2282 encode_open_confirm(xdr, args, &hdr);
2283 encode_nops(&hdr);
2284 }
2285
2286 /*
2287 * Encode an OPEN request with no attributes.
2288 */
2289 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2290 struct xdr_stream *xdr,
2291 struct nfs_openargs *args)
2292 {
2293 struct compound_hdr hdr = {
2294 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2295 };
2296
2297 encode_compound_hdr(xdr, req, &hdr);
2298 encode_sequence(xdr, &args->seq_args, &hdr);
2299 encode_putfh(xdr, args->fh, &hdr);
2300 encode_open(xdr, args, &hdr);
2301 if (args->access)
2302 encode_access(xdr, args->access, &hdr);
2303 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2304 encode_nops(&hdr);
2305 }
2306
2307 /*
2308 * Encode an OPEN_DOWNGRADE request
2309 */
2310 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2311 struct xdr_stream *xdr,
2312 struct nfs_closeargs *args)
2313 {
2314 struct compound_hdr hdr = {
2315 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2316 };
2317
2318 encode_compound_hdr(xdr, req, &hdr);
2319 encode_sequence(xdr, &args->seq_args, &hdr);
2320 encode_putfh(xdr, args->fh, &hdr);
2321 encode_open_downgrade(xdr, args, &hdr);
2322 encode_getfattr(xdr, args->bitmask, &hdr);
2323 encode_nops(&hdr);
2324 }
2325
2326 /*
2327 * Encode a LOCK request
2328 */
2329 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2330 struct nfs_lock_args *args)
2331 {
2332 struct compound_hdr hdr = {
2333 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334 };
2335
2336 encode_compound_hdr(xdr, req, &hdr);
2337 encode_sequence(xdr, &args->seq_args, &hdr);
2338 encode_putfh(xdr, args->fh, &hdr);
2339 encode_lock(xdr, args, &hdr);
2340 encode_nops(&hdr);
2341 }
2342
2343 /*
2344 * Encode a LOCKT request
2345 */
2346 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2347 struct nfs_lockt_args *args)
2348 {
2349 struct compound_hdr hdr = {
2350 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351 };
2352
2353 encode_compound_hdr(xdr, req, &hdr);
2354 encode_sequence(xdr, &args->seq_args, &hdr);
2355 encode_putfh(xdr, args->fh, &hdr);
2356 encode_lockt(xdr, args, &hdr);
2357 encode_nops(&hdr);
2358 }
2359
2360 /*
2361 * Encode a LOCKU request
2362 */
2363 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2364 struct nfs_locku_args *args)
2365 {
2366 struct compound_hdr hdr = {
2367 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368 };
2369
2370 encode_compound_hdr(xdr, req, &hdr);
2371 encode_sequence(xdr, &args->seq_args, &hdr);
2372 encode_putfh(xdr, args->fh, &hdr);
2373 encode_locku(xdr, args, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2378 struct xdr_stream *xdr,
2379 struct nfs_release_lockowner_args *args)
2380 {
2381 struct compound_hdr hdr = {
2382 .minorversion = 0,
2383 };
2384
2385 encode_compound_hdr(xdr, req, &hdr);
2386 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2387 encode_nops(&hdr);
2388 }
2389
2390 /*
2391 * Encode a READLINK request
2392 */
2393 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2394 const struct nfs4_readlink *args)
2395 {
2396 struct compound_hdr hdr = {
2397 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2398 };
2399
2400 encode_compound_hdr(xdr, req, &hdr);
2401 encode_sequence(xdr, &args->seq_args, &hdr);
2402 encode_putfh(xdr, args->fh, &hdr);
2403 encode_readlink(xdr, args, req, &hdr);
2404
2405 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2406 args->pgbase, args->pglen);
2407 encode_nops(&hdr);
2408 }
2409
2410 /*
2411 * Encode a READDIR request
2412 */
2413 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2414 const struct nfs4_readdir_arg *args)
2415 {
2416 struct compound_hdr hdr = {
2417 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2418 };
2419
2420 encode_compound_hdr(xdr, req, &hdr);
2421 encode_sequence(xdr, &args->seq_args, &hdr);
2422 encode_putfh(xdr, args->fh, &hdr);
2423 encode_readdir(xdr, args, req, &hdr);
2424
2425 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2426 args->pgbase, args->count);
2427 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2428 __func__, hdr.replen << 2, args->pages,
2429 args->pgbase, args->count);
2430 encode_nops(&hdr);
2431 }
2432
2433 /*
2434 * Encode a READ request
2435 */
2436 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2437 struct nfs_pgio_args *args)
2438 {
2439 struct compound_hdr hdr = {
2440 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2441 };
2442
2443 encode_compound_hdr(xdr, req, &hdr);
2444 encode_sequence(xdr, &args->seq_args, &hdr);
2445 encode_putfh(xdr, args->fh, &hdr);
2446 encode_read(xdr, args, &hdr);
2447
2448 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2449 args->pages, args->pgbase, args->count);
2450 req->rq_rcv_buf.flags |= XDRBUF_READ;
2451 encode_nops(&hdr);
2452 }
2453
2454 /*
2455 * Encode an SETATTR request
2456 */
2457 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2458 struct nfs_setattrargs *args)
2459 {
2460 struct compound_hdr hdr = {
2461 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462 };
2463
2464 encode_compound_hdr(xdr, req, &hdr);
2465 encode_sequence(xdr, &args->seq_args, &hdr);
2466 encode_putfh(xdr, args->fh, &hdr);
2467 encode_setattr(xdr, args, args->server, &hdr);
2468 encode_getfattr(xdr, args->bitmask, &hdr);
2469 encode_nops(&hdr);
2470 }
2471
2472 /*
2473 * Encode a GETACL request
2474 */
2475 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2476 struct nfs_getaclargs *args)
2477 {
2478 struct compound_hdr hdr = {
2479 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2480 };
2481 uint32_t replen;
2482
2483 encode_compound_hdr(xdr, req, &hdr);
2484 encode_sequence(xdr, &args->seq_args, &hdr);
2485 encode_putfh(xdr, args->fh, &hdr);
2486 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2487 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2488
2489 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2490 args->acl_pages, args->acl_pgbase, args->acl_len);
2491
2492 encode_nops(&hdr);
2493 }
2494
2495 /*
2496 * Encode a WRITE request
2497 */
2498 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2499 struct nfs_pgio_args *args)
2500 {
2501 struct compound_hdr hdr = {
2502 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503 };
2504
2505 encode_compound_hdr(xdr, req, &hdr);
2506 encode_sequence(xdr, &args->seq_args, &hdr);
2507 encode_putfh(xdr, args->fh, &hdr);
2508 encode_write(xdr, args, &hdr);
2509 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2510 if (args->bitmask)
2511 encode_getfattr(xdr, args->bitmask, &hdr);
2512 encode_nops(&hdr);
2513 }
2514
2515 /*
2516 * a COMMIT request
2517 */
2518 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2519 struct nfs_commitargs *args)
2520 {
2521 struct compound_hdr hdr = {
2522 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2523 };
2524
2525 encode_compound_hdr(xdr, req, &hdr);
2526 encode_sequence(xdr, &args->seq_args, &hdr);
2527 encode_putfh(xdr, args->fh, &hdr);
2528 encode_commit(xdr, args, &hdr);
2529 encode_nops(&hdr);
2530 }
2531
2532 /*
2533 * FSINFO request
2534 */
2535 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2536 struct nfs4_fsinfo_arg *args)
2537 {
2538 struct compound_hdr hdr = {
2539 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540 };
2541
2542 encode_compound_hdr(xdr, req, &hdr);
2543 encode_sequence(xdr, &args->seq_args, &hdr);
2544 encode_putfh(xdr, args->fh, &hdr);
2545 encode_fsinfo(xdr, args->bitmask, &hdr);
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * a PATHCONF request
2551 */
2552 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 const struct nfs4_pathconf_arg *args)
2554 {
2555 struct compound_hdr hdr = {
2556 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557 };
2558
2559 encode_compound_hdr(xdr, req, &hdr);
2560 encode_sequence(xdr, &args->seq_args, &hdr);
2561 encode_putfh(xdr, args->fh, &hdr);
2562 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2563 &hdr);
2564 encode_nops(&hdr);
2565 }
2566
2567 /*
2568 * a STATFS request
2569 */
2570 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2571 const struct nfs4_statfs_arg *args)
2572 {
2573 struct compound_hdr hdr = {
2574 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2575 };
2576
2577 encode_compound_hdr(xdr, req, &hdr);
2578 encode_sequence(xdr, &args->seq_args, &hdr);
2579 encode_putfh(xdr, args->fh, &hdr);
2580 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2581 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2582 encode_nops(&hdr);
2583 }
2584
2585 /*
2586 * GETATTR_BITMAP request
2587 */
2588 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2589 struct xdr_stream *xdr,
2590 struct nfs4_server_caps_arg *args)
2591 {
2592 struct compound_hdr hdr = {
2593 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594 };
2595
2596 encode_compound_hdr(xdr, req, &hdr);
2597 encode_sequence(xdr, &args->seq_args, &hdr);
2598 encode_putfh(xdr, args->fhandle, &hdr);
2599 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2600 FATTR4_WORD0_FH_EXPIRE_TYPE|
2601 FATTR4_WORD0_LINK_SUPPORT|
2602 FATTR4_WORD0_SYMLINK_SUPPORT|
2603 FATTR4_WORD0_ACLSUPPORT, &hdr);
2604 encode_nops(&hdr);
2605 }
2606
2607 /*
2608 * a RENEW request
2609 */
2610 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2611 struct nfs_client *clp)
2612 {
2613 struct compound_hdr hdr = {
2614 .nops = 0,
2615 };
2616
2617 encode_compound_hdr(xdr, req, &hdr);
2618 encode_renew(xdr, clp->cl_clientid, &hdr);
2619 encode_nops(&hdr);
2620 }
2621
2622 /*
2623 * a SETCLIENTID request
2624 */
2625 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2626 struct xdr_stream *xdr,
2627 struct nfs4_setclientid *sc)
2628 {
2629 struct compound_hdr hdr = {
2630 .nops = 0,
2631 };
2632
2633 encode_compound_hdr(xdr, req, &hdr);
2634 encode_setclientid(xdr, sc, &hdr);
2635 encode_nops(&hdr);
2636 }
2637
2638 /*
2639 * a SETCLIENTID_CONFIRM request
2640 */
2641 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2642 struct xdr_stream *xdr,
2643 struct nfs4_setclientid_res *arg)
2644 {
2645 struct compound_hdr hdr = {
2646 .nops = 0,
2647 };
2648
2649 encode_compound_hdr(xdr, req, &hdr);
2650 encode_setclientid_confirm(xdr, arg, &hdr);
2651 encode_nops(&hdr);
2652 }
2653
2654 /*
2655 * DELEGRETURN request
2656 */
2657 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2658 struct xdr_stream *xdr,
2659 const struct nfs4_delegreturnargs *args)
2660 {
2661 struct compound_hdr hdr = {
2662 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2663 };
2664
2665 encode_compound_hdr(xdr, req, &hdr);
2666 encode_sequence(xdr, &args->seq_args, &hdr);
2667 encode_putfh(xdr, args->fhandle, &hdr);
2668 encode_getfattr(xdr, args->bitmask, &hdr);
2669 encode_delegreturn(xdr, args->stateid, &hdr);
2670 encode_nops(&hdr);
2671 }
2672
2673 /*
2674 * Encode FS_LOCATIONS request
2675 */
2676 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2677 struct xdr_stream *xdr,
2678 struct nfs4_fs_locations_arg *args)
2679 {
2680 struct compound_hdr hdr = {
2681 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682 };
2683 uint32_t replen;
2684
2685 encode_compound_hdr(xdr, req, &hdr);
2686 encode_sequence(xdr, &args->seq_args, &hdr);
2687 if (args->migration) {
2688 encode_putfh(xdr, args->fh, &hdr);
2689 replen = hdr.replen;
2690 encode_fs_locations(xdr, args->bitmask, &hdr);
2691 if (args->renew)
2692 encode_renew(xdr, args->clientid, &hdr);
2693 } else {
2694 encode_putfh(xdr, args->dir_fh, &hdr);
2695 encode_lookup(xdr, args->name, &hdr);
2696 replen = hdr.replen;
2697 encode_fs_locations(xdr, args->bitmask, &hdr);
2698 }
2699
2700 /* Set up reply kvec to capture returned fs_locations array. */
2701 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2702 0, PAGE_SIZE);
2703 encode_nops(&hdr);
2704 }
2705
2706 /*
2707 * Encode SECINFO request
2708 */
2709 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2710 struct xdr_stream *xdr,
2711 struct nfs4_secinfo_arg *args)
2712 {
2713 struct compound_hdr hdr = {
2714 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2715 };
2716
2717 encode_compound_hdr(xdr, req, &hdr);
2718 encode_sequence(xdr, &args->seq_args, &hdr);
2719 encode_putfh(xdr, args->dir_fh, &hdr);
2720 encode_secinfo(xdr, args->name, &hdr);
2721 encode_nops(&hdr);
2722 }
2723
2724 /*
2725 * Encode FSID_PRESENT request
2726 */
2727 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2728 struct xdr_stream *xdr,
2729 struct nfs4_fsid_present_arg *args)
2730 {
2731 struct compound_hdr hdr = {
2732 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2733 };
2734
2735 encode_compound_hdr(xdr, req, &hdr);
2736 encode_sequence(xdr, &args->seq_args, &hdr);
2737 encode_putfh(xdr, args->fh, &hdr);
2738 encode_getfh(xdr, &hdr);
2739 if (args->renew)
2740 encode_renew(xdr, args->clientid, &hdr);
2741 encode_nops(&hdr);
2742 }
2743
2744 #if defined(CONFIG_NFS_V4_1)
2745 /*
2746 * BIND_CONN_TO_SESSION request
2747 */
2748 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2749 struct xdr_stream *xdr,
2750 struct nfs_client *clp)
2751 {
2752 struct compound_hdr hdr = {
2753 .minorversion = clp->cl_mvops->minor_version,
2754 };
2755
2756 encode_compound_hdr(xdr, req, &hdr);
2757 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2758 encode_nops(&hdr);
2759 }
2760
2761 /*
2762 * EXCHANGE_ID request
2763 */
2764 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2765 struct xdr_stream *xdr,
2766 struct nfs41_exchange_id_args *args)
2767 {
2768 struct compound_hdr hdr = {
2769 .minorversion = args->client->cl_mvops->minor_version,
2770 };
2771
2772 encode_compound_hdr(xdr, req, &hdr);
2773 encode_exchange_id(xdr, args, &hdr);
2774 encode_nops(&hdr);
2775 }
2776
2777 /*
2778 * a CREATE_SESSION request
2779 */
2780 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2781 struct xdr_stream *xdr,
2782 struct nfs41_create_session_args *args)
2783 {
2784 struct compound_hdr hdr = {
2785 .minorversion = args->client->cl_mvops->minor_version,
2786 };
2787
2788 encode_compound_hdr(xdr, req, &hdr);
2789 encode_create_session(xdr, args, &hdr);
2790 encode_nops(&hdr);
2791 }
2792
2793 /*
2794 * a DESTROY_SESSION request
2795 */
2796 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2797 struct xdr_stream *xdr,
2798 struct nfs4_session *session)
2799 {
2800 struct compound_hdr hdr = {
2801 .minorversion = session->clp->cl_mvops->minor_version,
2802 };
2803
2804 encode_compound_hdr(xdr, req, &hdr);
2805 encode_destroy_session(xdr, session, &hdr);
2806 encode_nops(&hdr);
2807 }
2808
2809 /*
2810 * a DESTROY_CLIENTID request
2811 */
2812 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2813 struct xdr_stream *xdr,
2814 struct nfs_client *clp)
2815 {
2816 struct compound_hdr hdr = {
2817 .minorversion = clp->cl_mvops->minor_version,
2818 };
2819
2820 encode_compound_hdr(xdr, req, &hdr);
2821 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2822 encode_nops(&hdr);
2823 }
2824
2825 /*
2826 * a SEQUENCE request
2827 */
2828 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2829 struct nfs4_sequence_args *args)
2830 {
2831 struct compound_hdr hdr = {
2832 .minorversion = nfs4_xdr_minorversion(args),
2833 };
2834
2835 encode_compound_hdr(xdr, req, &hdr);
2836 encode_sequence(xdr, args, &hdr);
2837 encode_nops(&hdr);
2838 }
2839
2840 /*
2841 * a GET_LEASE_TIME request
2842 */
2843 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2844 struct xdr_stream *xdr,
2845 struct nfs4_get_lease_time_args *args)
2846 {
2847 struct compound_hdr hdr = {
2848 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2849 };
2850 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2851
2852 encode_compound_hdr(xdr, req, &hdr);
2853 encode_sequence(xdr, &args->la_seq_args, &hdr);
2854 encode_putrootfh(xdr, &hdr);
2855 encode_fsinfo(xdr, lease_bitmap, &hdr);
2856 encode_nops(&hdr);
2857 }
2858
2859 /*
2860 * a RECLAIM_COMPLETE request
2861 */
2862 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2863 struct xdr_stream *xdr,
2864 struct nfs41_reclaim_complete_args *args)
2865 {
2866 struct compound_hdr hdr = {
2867 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2868 };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_sequence(xdr, &args->seq_args, &hdr);
2872 encode_reclaim_complete(xdr, args, &hdr);
2873 encode_nops(&hdr);
2874 }
2875
2876 /*
2877 * Encode GETDEVICEINFO request
2878 */
2879 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2880 struct xdr_stream *xdr,
2881 struct nfs4_getdeviceinfo_args *args)
2882 {
2883 struct compound_hdr hdr = {
2884 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_sequence(xdr, &args->seq_args, &hdr);
2889 encode_getdeviceinfo(xdr, args, &hdr);
2890
2891 /* set up reply kvec. Subtract notification bitmap max size (2)
2892 * so that notification bitmap is put in xdr_buf tail */
2893 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2894 args->pdev->pages, args->pdev->pgbase,
2895 args->pdev->pglen);
2896
2897 encode_nops(&hdr);
2898 }
2899
2900 /*
2901 * Encode LAYOUTGET request
2902 */
2903 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2904 struct xdr_stream *xdr,
2905 struct nfs4_layoutget_args *args)
2906 {
2907 struct compound_hdr hdr = {
2908 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2909 };
2910
2911 encode_compound_hdr(xdr, req, &hdr);
2912 encode_sequence(xdr, &args->seq_args, &hdr);
2913 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2914 encode_layoutget(xdr, args, &hdr);
2915
2916 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2917 args->layout.pages, 0, args->layout.pglen);
2918
2919 encode_nops(&hdr);
2920 }
2921
2922 /*
2923 * Encode LAYOUTCOMMIT request
2924 */
2925 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2926 struct xdr_stream *xdr,
2927 struct nfs4_layoutcommit_args *args)
2928 {
2929 struct nfs4_layoutcommit_data *data =
2930 container_of(args, struct nfs4_layoutcommit_data, args);
2931 struct compound_hdr hdr = {
2932 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2933 };
2934
2935 encode_compound_hdr(xdr, req, &hdr);
2936 encode_sequence(xdr, &args->seq_args, &hdr);
2937 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2938 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2939 encode_getfattr(xdr, args->bitmask, &hdr);
2940 encode_nops(&hdr);
2941 }
2942
2943 /*
2944 * Encode LAYOUTRETURN request
2945 */
2946 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2947 struct xdr_stream *xdr,
2948 struct nfs4_layoutreturn_args *args)
2949 {
2950 struct compound_hdr hdr = {
2951 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2952 };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, &args->seq_args, &hdr);
2956 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2957 encode_layoutreturn(xdr, args, &hdr);
2958 encode_nops(&hdr);
2959 }
2960
2961 /*
2962 * Encode SECINFO_NO_NAME request
2963 */
2964 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 struct nfs41_secinfo_no_name_args *args)
2967 {
2968 struct compound_hdr hdr = {
2969 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2970 };
2971
2972 encode_compound_hdr(xdr, req, &hdr);
2973 encode_sequence(xdr, &args->seq_args, &hdr);
2974 encode_putrootfh(xdr, &hdr);
2975 encode_secinfo_no_name(xdr, args, &hdr);
2976 encode_nops(&hdr);
2977 return 0;
2978 }
2979
2980 /*
2981 * Encode TEST_STATEID request
2982 */
2983 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2984 struct xdr_stream *xdr,
2985 struct nfs41_test_stateid_args *args)
2986 {
2987 struct compound_hdr hdr = {
2988 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989 };
2990
2991 encode_compound_hdr(xdr, req, &hdr);
2992 encode_sequence(xdr, &args->seq_args, &hdr);
2993 encode_test_stateid(xdr, args, &hdr);
2994 encode_nops(&hdr);
2995 }
2996
2997 /*
2998 * Encode FREE_STATEID request
2999 */
3000 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3001 struct xdr_stream *xdr,
3002 struct nfs41_free_stateid_args *args)
3003 {
3004 struct compound_hdr hdr = {
3005 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006 };
3007
3008 encode_compound_hdr(xdr, req, &hdr);
3009 encode_sequence(xdr, &args->seq_args, &hdr);
3010 encode_free_stateid(xdr, args, &hdr);
3011 encode_nops(&hdr);
3012 }
3013 #endif /* CONFIG_NFS_V4_1 */
3014
3015 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3016 {
3017 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3018 "Remaining buffer length is %tu words.\n",
3019 func, xdr->end - xdr->p);
3020 }
3021
3022 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3023 {
3024 __be32 *p;
3025
3026 p = xdr_inline_decode(xdr, 4);
3027 if (unlikely(!p))
3028 goto out_overflow;
3029 *len = be32_to_cpup(p);
3030 p = xdr_inline_decode(xdr, *len);
3031 if (unlikely(!p))
3032 goto out_overflow;
3033 *string = (char *)p;
3034 return 0;
3035 out_overflow:
3036 print_overflow_msg(__func__, xdr);
3037 return -EIO;
3038 }
3039
3040 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3041 {
3042 __be32 *p;
3043
3044 p = xdr_inline_decode(xdr, 8);
3045 if (unlikely(!p))
3046 goto out_overflow;
3047 hdr->status = be32_to_cpup(p++);
3048 hdr->taglen = be32_to_cpup(p);
3049
3050 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3051 if (unlikely(!p))
3052 goto out_overflow;
3053 hdr->tag = (char *)p;
3054 p += XDR_QUADLEN(hdr->taglen);
3055 hdr->nops = be32_to_cpup(p);
3056 if (unlikely(hdr->nops < 1))
3057 return nfs4_stat_to_errno(hdr->status);
3058 return 0;
3059 out_overflow:
3060 print_overflow_msg(__func__, xdr);
3061 return -EIO;
3062 }
3063
3064 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3065 int *nfs_retval)
3066 {
3067 __be32 *p;
3068 uint32_t opnum;
3069 int32_t nfserr;
3070
3071 p = xdr_inline_decode(xdr, 8);
3072 if (unlikely(!p))
3073 goto out_overflow;
3074 opnum = be32_to_cpup(p++);
3075 if (unlikely(opnum != expected))
3076 goto out_bad_operation;
3077 nfserr = be32_to_cpup(p);
3078 if (nfserr == NFS_OK)
3079 *nfs_retval = 0;
3080 else
3081 *nfs_retval = nfs4_stat_to_errno(nfserr);
3082 return true;
3083 out_bad_operation:
3084 dprintk("nfs: Server returned operation"
3085 " %d but we issued a request for %d\n",
3086 opnum, expected);
3087 *nfs_retval = -EREMOTEIO;
3088 return false;
3089 out_overflow:
3090 print_overflow_msg(__func__, xdr);
3091 *nfs_retval = -EIO;
3092 return false;
3093 }
3094
3095 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3096 {
3097 int retval;
3098
3099 __decode_op_hdr(xdr, expected, &retval);
3100 return retval;
3101 }
3102
3103 /* Dummy routine */
3104 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3105 {
3106 __be32 *p;
3107 unsigned int strlen;
3108 char *str;
3109
3110 p = xdr_inline_decode(xdr, 12);
3111 if (likely(p))
3112 return decode_opaque_inline(xdr, &strlen, &str);
3113 print_overflow_msg(__func__, xdr);
3114 return -EIO;
3115 }
3116
3117 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3118 {
3119 uint32_t bmlen;
3120 __be32 *p;
3121
3122 p = xdr_inline_decode(xdr, 4);
3123 if (unlikely(!p))
3124 goto out_overflow;
3125 bmlen = be32_to_cpup(p);
3126
3127 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3128 p = xdr_inline_decode(xdr, (bmlen << 2));
3129 if (unlikely(!p))
3130 goto out_overflow;
3131 if (bmlen > 0) {
3132 bitmap[0] = be32_to_cpup(p++);
3133 if (bmlen > 1) {
3134 bitmap[1] = be32_to_cpup(p++);
3135 if (bmlen > 2)
3136 bitmap[2] = be32_to_cpup(p);
3137 }
3138 }
3139 return 0;
3140 out_overflow:
3141 print_overflow_msg(__func__, xdr);
3142 return -EIO;
3143 }
3144
3145 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3146 {
3147 __be32 *p;
3148
3149 p = xdr_inline_decode(xdr, 4);
3150 if (unlikely(!p))
3151 goto out_overflow;
3152 *attrlen = be32_to_cpup(p);
3153 *savep = xdr_stream_pos(xdr);
3154 return 0;
3155 out_overflow:
3156 print_overflow_msg(__func__, xdr);
3157 return -EIO;
3158 }
3159
3160 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3161 {
3162 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3163 int ret;
3164 ret = decode_attr_bitmap(xdr, bitmask);
3165 if (unlikely(ret < 0))
3166 return ret;
3167 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3168 } else
3169 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3170 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3171 bitmask[0], bitmask[1], bitmask[2]);
3172 return 0;
3173 }
3174
3175 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3176 {
3177 __be32 *p;
3178 int ret = 0;
3179
3180 *type = 0;
3181 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3182 return -EIO;
3183 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3184 p = xdr_inline_decode(xdr, 4);
3185 if (unlikely(!p))
3186 goto out_overflow;
3187 *type = be32_to_cpup(p);
3188 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3189 dprintk("%s: bad type %d\n", __func__, *type);
3190 return -EIO;
3191 }
3192 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3193 ret = NFS_ATTR_FATTR_TYPE;
3194 }
3195 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3196 return ret;
3197 out_overflow:
3198 print_overflow_msg(__func__, xdr);
3199 return -EIO;
3200 }
3201
3202 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3203 uint32_t *bitmap, uint32_t *type)
3204 {
3205 __be32 *p;
3206
3207 *type = 0;
3208 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3209 return -EIO;
3210 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3211 p = xdr_inline_decode(xdr, 4);
3212 if (unlikely(!p))
3213 goto out_overflow;
3214 *type = be32_to_cpup(p);
3215 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3216 }
3217 dprintk("%s: expire type=0x%x\n", __func__, *type);
3218 return 0;
3219 out_overflow:
3220 print_overflow_msg(__func__, xdr);
3221 return -EIO;
3222 }
3223
3224 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3225 {
3226 __be32 *p;
3227 int ret = 0;
3228
3229 *change = 0;
3230 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3231 return -EIO;
3232 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3233 p = xdr_inline_decode(xdr, 8);
3234 if (unlikely(!p))
3235 goto out_overflow;
3236 xdr_decode_hyper(p, change);
3237 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3238 ret = NFS_ATTR_FATTR_CHANGE;
3239 }
3240 dprintk("%s: change attribute=%Lu\n", __func__,
3241 (unsigned long long)*change);
3242 return ret;
3243 out_overflow:
3244 print_overflow_msg(__func__, xdr);
3245 return -EIO;
3246 }
3247
3248 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3249 {
3250 __be32 *p;
3251 int ret = 0;
3252
3253 *size = 0;
3254 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3255 return -EIO;
3256 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3257 p = xdr_inline_decode(xdr, 8);
3258 if (unlikely(!p))
3259 goto out_overflow;
3260 xdr_decode_hyper(p, size);
3261 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3262 ret = NFS_ATTR_FATTR_SIZE;
3263 }
3264 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3265 return ret;
3266 out_overflow:
3267 print_overflow_msg(__func__, xdr);
3268 return -EIO;
3269 }
3270
3271 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3272 {
3273 __be32 *p;
3274
3275 *res = 0;
3276 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3277 return -EIO;
3278 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3279 p = xdr_inline_decode(xdr, 4);
3280 if (unlikely(!p))
3281 goto out_overflow;
3282 *res = be32_to_cpup(p);
3283 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3284 }
3285 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3286 return 0;
3287 out_overflow:
3288 print_overflow_msg(__func__, xdr);
3289 return -EIO;
3290 }
3291
3292 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3293 {
3294 __be32 *p;
3295
3296 *res = 0;
3297 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3298 return -EIO;
3299 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3300 p = xdr_inline_decode(xdr, 4);
3301 if (unlikely(!p))
3302 goto out_overflow;
3303 *res = be32_to_cpup(p);
3304 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3305 }
3306 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3307 return 0;
3308 out_overflow:
3309 print_overflow_msg(__func__, xdr);
3310 return -EIO;
3311 }
3312
3313 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3314 {
3315 __be32 *p;
3316 int ret = 0;
3317
3318 fsid->major = 0;
3319 fsid->minor = 0;
3320 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3321 return -EIO;
3322 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3323 p = xdr_inline_decode(xdr, 16);
3324 if (unlikely(!p))
3325 goto out_overflow;
3326 p = xdr_decode_hyper(p, &fsid->major);
3327 xdr_decode_hyper(p, &fsid->minor);
3328 bitmap[0] &= ~FATTR4_WORD0_FSID;
3329 ret = NFS_ATTR_FATTR_FSID;
3330 }
3331 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3332 (unsigned long long)fsid->major,
3333 (unsigned long long)fsid->minor);
3334 return ret;
3335 out_overflow:
3336 print_overflow_msg(__func__, xdr);
3337 return -EIO;
3338 }
3339
3340 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3341 {
3342 __be32 *p;
3343
3344 *res = 60;
3345 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3346 return -EIO;
3347 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3348 p = xdr_inline_decode(xdr, 4);
3349 if (unlikely(!p))
3350 goto out_overflow;
3351 *res = be32_to_cpup(p);
3352 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3353 }
3354 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3355 return 0;
3356 out_overflow:
3357 print_overflow_msg(__func__, xdr);
3358 return -EIO;
3359 }
3360
3361 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3362 {
3363 __be32 *p;
3364
3365 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3366 return -EIO;
3367 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3368 p = xdr_inline_decode(xdr, 4);
3369 if (unlikely(!p))
3370 goto out_overflow;
3371 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3372 *res = -be32_to_cpup(p);
3373 }
3374 return 0;
3375 out_overflow:
3376 print_overflow_msg(__func__, xdr);
3377 return -EIO;
3378 }
3379
3380 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3381 {
3382 __be32 *p;
3383 int len;
3384
3385 if (fh != NULL)
3386 memset(fh, 0, sizeof(*fh));
3387
3388 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3389 return -EIO;
3390 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3391 p = xdr_inline_decode(xdr, 4);
3392 if (unlikely(!p))
3393 goto out_overflow;
3394 len = be32_to_cpup(p);
3395 if (len > NFS4_FHSIZE)
3396 return -EIO;
3397 p = xdr_inline_decode(xdr, len);
3398 if (unlikely(!p))
3399 goto out_overflow;
3400 if (fh != NULL) {
3401 memcpy(fh->data, p, len);
3402 fh->size = len;
3403 }
3404 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3405 }
3406 return 0;
3407 out_overflow:
3408 print_overflow_msg(__func__, xdr);
3409 return -EIO;
3410 }
3411
3412 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3413 {
3414 __be32 *p;
3415
3416 *res = 0;
3417 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3418 return -EIO;
3419 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3420 p = xdr_inline_decode(xdr, 4);
3421 if (unlikely(!p))
3422 goto out_overflow;
3423 *res = be32_to_cpup(p);
3424 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3425 }
3426 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3427 return 0;
3428 out_overflow:
3429 print_overflow_msg(__func__, xdr);
3430 return -EIO;
3431 }
3432
3433 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3434 {
3435 __be32 *p;
3436 int ret = 0;
3437
3438 *fileid = 0;
3439 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3440 return -EIO;
3441 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3442 p = xdr_inline_decode(xdr, 8);
3443 if (unlikely(!p))
3444 goto out_overflow;
3445 xdr_decode_hyper(p, fileid);
3446 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3447 ret = NFS_ATTR_FATTR_FILEID;
3448 }
3449 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3450 return ret;
3451 out_overflow:
3452 print_overflow_msg(__func__, xdr);
3453 return -EIO;
3454 }
3455
3456 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3457 {
3458 __be32 *p;
3459 int ret = 0;
3460
3461 *fileid = 0;
3462 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3463 return -EIO;
3464 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3465 p = xdr_inline_decode(xdr, 8);
3466 if (unlikely(!p))
3467 goto out_overflow;
3468 xdr_decode_hyper(p, fileid);
3469 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3470 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3471 }
3472 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3473 return ret;
3474 out_overflow:
3475 print_overflow_msg(__func__, xdr);
3476 return -EIO;
3477 }
3478
3479 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3480 {
3481 __be32 *p;
3482 int status = 0;
3483
3484 *res = 0;
3485 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3486 return -EIO;
3487 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3488 p = xdr_inline_decode(xdr, 8);
3489 if (unlikely(!p))
3490 goto out_overflow;
3491 xdr_decode_hyper(p, res);
3492 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3493 }
3494 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3495 return status;
3496 out_overflow:
3497 print_overflow_msg(__func__, xdr);
3498 return -EIO;
3499 }
3500
3501 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503 __be32 *p;
3504 int status = 0;
3505
3506 *res = 0;
3507 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3508 return -EIO;
3509 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3510 p = xdr_inline_decode(xdr, 8);
3511 if (unlikely(!p))
3512 goto out_overflow;
3513 xdr_decode_hyper(p, res);
3514 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3515 }
3516 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3517 return status;
3518 out_overflow:
3519 print_overflow_msg(__func__, xdr);
3520 return -EIO;
3521 }
3522
3523 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3524 {
3525 __be32 *p;
3526 int status = 0;
3527
3528 *res = 0;
3529 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3530 return -EIO;
3531 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3532 p = xdr_inline_decode(xdr, 8);
3533 if (unlikely(!p))
3534 goto out_overflow;
3535 xdr_decode_hyper(p, res);
3536 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3537 }
3538 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3539 return status;
3540 out_overflow:
3541 print_overflow_msg(__func__, xdr);
3542 return -EIO;
3543 }
3544
3545 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3546 {
3547 u32 n;
3548 __be32 *p;
3549 int status = 0;
3550
3551 p = xdr_inline_decode(xdr, 4);
3552 if (unlikely(!p))
3553 goto out_overflow;
3554 n = be32_to_cpup(p);
3555 if (n == 0)
3556 goto root_path;
3557 dprintk("pathname4: ");
3558 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3559 dprintk("cannot parse %d components in path\n", n);
3560 goto out_eio;
3561 }
3562 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3563 struct nfs4_string *component = &path->components[path->ncomponents];
3564 status = decode_opaque_inline(xdr, &component->len, &component->data);
3565 if (unlikely(status != 0))
3566 goto out_eio;
3567 ifdebug (XDR)
3568 pr_cont("%s%.*s ",
3569 (path->ncomponents != n ? "/ " : ""),
3570 component->len, component->data);
3571 }
3572 out:
3573 return status;
3574 root_path:
3575 /* a root pathname is sent as a zero component4 */
3576 path->ncomponents = 1;
3577 path->components[0].len=0;
3578 path->components[0].data=NULL;
3579 dprintk("pathname4: /\n");
3580 goto out;
3581 out_eio:
3582 dprintk(" status %d", status);
3583 status = -EIO;
3584 goto out;
3585 out_overflow:
3586 print_overflow_msg(__func__, xdr);
3587 return -EIO;
3588 }
3589
3590 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3591 {
3592 int n;
3593 __be32 *p;
3594 int status = -EIO;
3595
3596 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3597 goto out;
3598 status = 0;
3599 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3600 goto out;
3601 status = -EIO;
3602 /* Ignore borken servers that return unrequested attrs */
3603 if (unlikely(res == NULL))
3604 goto out;
3605 dprintk("%s: fsroot:\n", __func__);
3606 status = decode_pathname(xdr, &res->fs_path);
3607 if (unlikely(status != 0))
3608 goto out;
3609 p = xdr_inline_decode(xdr, 4);
3610 if (unlikely(!p))
3611 goto out_overflow;
3612 n = be32_to_cpup(p);
3613 if (n <= 0)
3614 goto out_eio;
3615 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3616 u32 m;
3617 struct nfs4_fs_location *loc;
3618
3619 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3620 break;
3621 loc = &res->locations[res->nlocations];
3622 p = xdr_inline_decode(xdr, 4);
3623 if (unlikely(!p))
3624 goto out_overflow;
3625 m = be32_to_cpup(p);
3626
3627 dprintk("%s: servers:\n", __func__);
3628 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3629 struct nfs4_string *server;
3630
3631 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3632 unsigned int i;
3633 dprintk("%s: using first %u of %u servers "
3634 "returned for location %u\n",
3635 __func__,
3636 NFS4_FS_LOCATION_MAXSERVERS,
3637 m, res->nlocations);
3638 for (i = loc->nservers; i < m; i++) {
3639 unsigned int len;
3640 char *data;
3641 status = decode_opaque_inline(xdr, &len, &data);
3642 if (unlikely(status != 0))
3643 goto out_eio;
3644 }
3645 break;
3646 }
3647 server = &loc->servers[loc->nservers];
3648 status = decode_opaque_inline(xdr, &server->len, &server->data);
3649 if (unlikely(status != 0))
3650 goto out_eio;
3651 dprintk("%s ", server->data);
3652 }
3653 status = decode_pathname(xdr, &loc->rootpath);
3654 if (unlikely(status != 0))
3655 goto out_eio;
3656 }
3657 if (res->nlocations != 0)
3658 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3659 out:
3660 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3661 return status;
3662 out_overflow:
3663 print_overflow_msg(__func__, xdr);
3664 out_eio:
3665 status = -EIO;
3666 goto out;
3667 }
3668
3669 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3670 {
3671 __be32 *p;
3672 int status = 0;
3673
3674 *res = 0;
3675 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3676 return -EIO;
3677 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3678 p = xdr_inline_decode(xdr, 8);
3679 if (unlikely(!p))
3680 goto out_overflow;
3681 xdr_decode_hyper(p, res);
3682 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3683 }
3684 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3685 return status;
3686 out_overflow:
3687 print_overflow_msg(__func__, xdr);
3688 return -EIO;
3689 }
3690
3691 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3692 {
3693 __be32 *p;
3694 int status = 0;
3695
3696 *maxlink = 1;
3697 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3698 return -EIO;
3699 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3700 p = xdr_inline_decode(xdr, 4);
3701 if (unlikely(!p))
3702 goto out_overflow;
3703 *maxlink = be32_to_cpup(p);
3704 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3705 }
3706 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3707 return status;
3708 out_overflow:
3709 print_overflow_msg(__func__, xdr);
3710 return -EIO;
3711 }
3712
3713 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3714 {
3715 __be32 *p;
3716 int status = 0;
3717
3718 *maxname = 1024;
3719 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3720 return -EIO;
3721 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3722 p = xdr_inline_decode(xdr, 4);
3723 if (unlikely(!p))
3724 goto out_overflow;
3725 *maxname = be32_to_cpup(p);
3726 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3727 }
3728 dprintk("%s: maxname=%u\n", __func__, *maxname);
3729 return status;
3730 out_overflow:
3731 print_overflow_msg(__func__, xdr);
3732 return -EIO;
3733 }
3734
3735 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3736 {
3737 __be32 *p;
3738 int status = 0;
3739
3740 *res = 1024;
3741 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3742 return -EIO;
3743 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3744 uint64_t maxread;
3745 p = xdr_inline_decode(xdr, 8);
3746 if (unlikely(!p))
3747 goto out_overflow;
3748 xdr_decode_hyper(p, &maxread);
3749 if (maxread > 0x7FFFFFFF)
3750 maxread = 0x7FFFFFFF;
3751 *res = (uint32_t)maxread;
3752 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3753 }
3754 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3755 return status;
3756 out_overflow:
3757 print_overflow_msg(__func__, xdr);
3758 return -EIO;
3759 }
3760
3761 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3762 {
3763 __be32 *p;
3764 int status = 0;
3765
3766 *res = 1024;
3767 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3768 return -EIO;
3769 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3770 uint64_t maxwrite;
3771 p = xdr_inline_decode(xdr, 8);
3772 if (unlikely(!p))
3773 goto out_overflow;
3774 xdr_decode_hyper(p, &maxwrite);
3775 if (maxwrite > 0x7FFFFFFF)
3776 maxwrite = 0x7FFFFFFF;
3777 *res = (uint32_t)maxwrite;
3778 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3779 }
3780 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3781 return status;
3782 out_overflow:
3783 print_overflow_msg(__func__, xdr);
3784 return -EIO;
3785 }
3786
3787 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3788 {
3789 uint32_t tmp;
3790 __be32 *p;
3791 int ret = 0;
3792
3793 *mode = 0;
3794 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3795 return -EIO;
3796 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3797 p = xdr_inline_decode(xdr, 4);
3798 if (unlikely(!p))
3799 goto out_overflow;
3800 tmp = be32_to_cpup(p);
3801 *mode = tmp & ~S_IFMT;
3802 bitmap[1] &= ~FATTR4_WORD1_MODE;
3803 ret = NFS_ATTR_FATTR_MODE;
3804 }
3805 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3806 return ret;
3807 out_overflow:
3808 print_overflow_msg(__func__, xdr);
3809 return -EIO;
3810 }
3811
3812 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3813 {
3814 __be32 *p;
3815 int ret = 0;
3816
3817 *nlink = 1;
3818 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3819 return -EIO;
3820 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3821 p = xdr_inline_decode(xdr, 4);
3822 if (unlikely(!p))
3823 goto out_overflow;
3824 *nlink = be32_to_cpup(p);
3825 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3826 ret = NFS_ATTR_FATTR_NLINK;
3827 }
3828 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3829 return ret;
3830 out_overflow:
3831 print_overflow_msg(__func__, xdr);
3832 return -EIO;
3833 }
3834
3835 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3836 const struct nfs_server *server, kuid_t *uid,
3837 struct nfs4_string *owner_name)
3838 {
3839 uint32_t len;
3840 __be32 *p;
3841 int ret = 0;
3842
3843 *uid = make_kuid(&init_user_ns, -2);
3844 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3845 return -EIO;
3846 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3847 p = xdr_inline_decode(xdr, 4);
3848 if (unlikely(!p))
3849 goto out_overflow;
3850 len = be32_to_cpup(p);
3851 p = xdr_inline_decode(xdr, len);
3852 if (unlikely(!p))
3853 goto out_overflow;
3854 if (owner_name != NULL) {
3855 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3856 if (owner_name->data != NULL) {
3857 owner_name->len = len;
3858 ret = NFS_ATTR_FATTR_OWNER_NAME;
3859 }
3860 } else if (len < XDR_MAX_NETOBJ) {
3861 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3862 ret = NFS_ATTR_FATTR_OWNER;
3863 else
3864 dprintk("%s: nfs_map_name_to_uid failed!\n",
3865 __func__);
3866 } else
3867 dprintk("%s: name too long (%u)!\n",
3868 __func__, len);
3869 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3870 }
3871 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3872 return ret;
3873 out_overflow:
3874 print_overflow_msg(__func__, xdr);
3875 return -EIO;
3876 }
3877
3878 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3879 const struct nfs_server *server, kgid_t *gid,
3880 struct nfs4_string *group_name)
3881 {
3882 uint32_t len;
3883 __be32 *p;
3884 int ret = 0;
3885
3886 *gid = make_kgid(&init_user_ns, -2);
3887 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3888 return -EIO;
3889 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3890 p = xdr_inline_decode(xdr, 4);
3891 if (unlikely(!p))
3892 goto out_overflow;
3893 len = be32_to_cpup(p);
3894 p = xdr_inline_decode(xdr, len);
3895 if (unlikely(!p))
3896 goto out_overflow;
3897 if (group_name != NULL) {
3898 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3899 if (group_name->data != NULL) {
3900 group_name->len = len;
3901 ret = NFS_ATTR_FATTR_GROUP_NAME;
3902 }
3903 } else if (len < XDR_MAX_NETOBJ) {
3904 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3905 ret = NFS_ATTR_FATTR_GROUP;
3906 else
3907 dprintk("%s: nfs_map_group_to_gid failed!\n",
3908 __func__);
3909 } else
3910 dprintk("%s: name too long (%u)!\n",
3911 __func__, len);
3912 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3913 }
3914 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3915 return ret;
3916 out_overflow:
3917 print_overflow_msg(__func__, xdr);
3918 return -EIO;
3919 }
3920
3921 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3922 {
3923 uint32_t major = 0, minor = 0;
3924 __be32 *p;
3925 int ret = 0;
3926
3927 *rdev = MKDEV(0,0);
3928 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3929 return -EIO;
3930 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3931 dev_t tmp;
3932
3933 p = xdr_inline_decode(xdr, 8);
3934 if (unlikely(!p))
3935 goto out_overflow;
3936 major = be32_to_cpup(p++);
3937 minor = be32_to_cpup(p);
3938 tmp = MKDEV(major, minor);
3939 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3940 *rdev = tmp;
3941 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3942 ret = NFS_ATTR_FATTR_RDEV;
3943 }
3944 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3945 return ret;
3946 out_overflow:
3947 print_overflow_msg(__func__, xdr);
3948 return -EIO;
3949 }
3950
3951 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3952 {
3953 __be32 *p;
3954 int status = 0;
3955
3956 *res = 0;
3957 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3958 return -EIO;
3959 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3960 p = xdr_inline_decode(xdr, 8);
3961 if (unlikely(!p))
3962 goto out_overflow;
3963 xdr_decode_hyper(p, res);
3964 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3965 }
3966 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3967 return status;
3968 out_overflow:
3969 print_overflow_msg(__func__, xdr);
3970 return -EIO;
3971 }
3972
3973 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975 __be32 *p;
3976 int status = 0;
3977
3978 *res = 0;
3979 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3980 return -EIO;
3981 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3982 p = xdr_inline_decode(xdr, 8);
3983 if (unlikely(!p))
3984 goto out_overflow;
3985 xdr_decode_hyper(p, res);
3986 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3987 }
3988 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3989 return status;
3990 out_overflow:
3991 print_overflow_msg(__func__, xdr);
3992 return -EIO;
3993 }
3994
3995 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3996 {
3997 __be32 *p;
3998 int status = 0;
3999
4000 *res = 0;
4001 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4002 return -EIO;
4003 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4004 p = xdr_inline_decode(xdr, 8);
4005 if (unlikely(!p))
4006 goto out_overflow;
4007 xdr_decode_hyper(p, res);
4008 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4009 }
4010 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4011 return status;
4012 out_overflow:
4013 print_overflow_msg(__func__, xdr);
4014 return -EIO;
4015 }
4016
4017 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4018 {
4019 __be32 *p;
4020 int ret = 0;
4021
4022 *used = 0;
4023 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4024 return -EIO;
4025 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4026 p = xdr_inline_decode(xdr, 8);
4027 if (unlikely(!p))
4028 goto out_overflow;
4029 xdr_decode_hyper(p, used);
4030 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4031 ret = NFS_ATTR_FATTR_SPACE_USED;
4032 }
4033 dprintk("%s: space used=%Lu\n", __func__,
4034 (unsigned long long)*used);
4035 return ret;
4036 out_overflow:
4037 print_overflow_msg(__func__, xdr);
4038 return -EIO;
4039 }
4040
4041 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4042 {
4043 __be32 *p;
4044 uint64_t sec;
4045 uint32_t nsec;
4046
4047 p = xdr_inline_decode(xdr, 12);
4048 if (unlikely(!p))
4049 goto out_overflow;
4050 p = xdr_decode_hyper(p, &sec);
4051 nsec = be32_to_cpup(p);
4052 time->tv_sec = (time_t)sec;
4053 time->tv_nsec = (long)nsec;
4054 return 0;
4055 out_overflow:
4056 print_overflow_msg(__func__, xdr);
4057 return -EIO;
4058 }
4059
4060 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4061 {
4062 int status = 0;
4063
4064 time->tv_sec = 0;
4065 time->tv_nsec = 0;
4066 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4067 return -EIO;
4068 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4069 status = decode_attr_time(xdr, time);
4070 if (status == 0)
4071 status = NFS_ATTR_FATTR_ATIME;
4072 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4073 }
4074 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4075 return status;
4076 }
4077
4078 static int decode_attr_time_metadata(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_METADATA - 1U)))
4085 return -EIO;
4086 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4087 status = decode_attr_time(xdr, time);
4088 if (status == 0)
4089 status = NFS_ATTR_FATTR_CTIME;
4090 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4091 }
4092 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4093 return status;
4094 }
4095
4096 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4097 struct timespec *time)
4098 {
4099 int status = 0;
4100
4101 time->tv_sec = 0;
4102 time->tv_nsec = 0;
4103 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4104 return -EIO;
4105 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4106 status = decode_attr_time(xdr, time);
4107 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4108 }
4109 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4110 (long)time->tv_nsec);
4111 return status;
4112 }
4113
4114 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4115 struct nfs4_label *label)
4116 {
4117 uint32_t pi = 0;
4118 uint32_t lfs = 0;
4119 __u32 len;
4120 __be32 *p;
4121 int status = 0;
4122
4123 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4124 return -EIO;
4125 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4126 p = xdr_inline_decode(xdr, 4);
4127 if (unlikely(!p))
4128 goto out_overflow;
4129 lfs = be32_to_cpup(p++);
4130 p = xdr_inline_decode(xdr, 4);
4131 if (unlikely(!p))
4132 goto out_overflow;
4133 pi = be32_to_cpup(p++);
4134 p = xdr_inline_decode(xdr, 4);
4135 if (unlikely(!p))
4136 goto out_overflow;
4137 len = be32_to_cpup(p++);
4138 p = xdr_inline_decode(xdr, len);
4139 if (unlikely(!p))
4140 goto out_overflow;
4141 if (len < NFS4_MAXLABELLEN) {
4142 if (label) {
4143 memcpy(label->label, p, len);
4144 label->len = len;
4145 label->pi = pi;
4146 label->lfs = lfs;
4147 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4148 }
4149 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4150 } else
4151 printk(KERN_WARNING "%s: label too long (%u)!\n",
4152 __func__, len);
4153 }
4154 if (label && label->label)
4155 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4156 (char *)label->label, label->len, label->pi, label->lfs);
4157 return status;
4158
4159 out_overflow:
4160 print_overflow_msg(__func__, xdr);
4161 return -EIO;
4162 }
4163
4164 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4165 {
4166 int status = 0;
4167
4168 time->tv_sec = 0;
4169 time->tv_nsec = 0;
4170 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4171 return -EIO;
4172 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4173 status = decode_attr_time(xdr, time);
4174 if (status == 0)
4175 status = NFS_ATTR_FATTR_MTIME;
4176 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4177 }
4178 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4179 return status;
4180 }
4181
4182 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4183 {
4184 unsigned int attrwords = XDR_QUADLEN(attrlen);
4185 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4186
4187 if (unlikely(attrwords != nwords)) {
4188 dprintk("%s: server returned incorrect attribute length: "
4189 "%u %c %u\n",
4190 __func__,
4191 attrwords << 2,
4192 (attrwords < nwords) ? '<' : '>',
4193 nwords << 2);
4194 return -EIO;
4195 }
4196 return 0;
4197 }
4198
4199 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4200 {
4201 __be32 *p;
4202
4203 p = xdr_inline_decode(xdr, 20);
4204 if (unlikely(!p))
4205 goto out_overflow;
4206 cinfo->atomic = be32_to_cpup(p++);
4207 p = xdr_decode_hyper(p, &cinfo->before);
4208 xdr_decode_hyper(p, &cinfo->after);
4209 return 0;
4210 out_overflow:
4211 print_overflow_msg(__func__, xdr);
4212 return -EIO;
4213 }
4214
4215 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4216 {
4217 __be32 *p;
4218 uint32_t supp, acc;
4219 int status;
4220
4221 status = decode_op_hdr(xdr, OP_ACCESS);
4222 if (status)
4223 return status;
4224 p = xdr_inline_decode(xdr, 8);
4225 if (unlikely(!p))
4226 goto out_overflow;
4227 supp = be32_to_cpup(p++);
4228 acc = be32_to_cpup(p);
4229 *supported = supp;
4230 *access = acc;
4231 return 0;
4232 out_overflow:
4233 print_overflow_msg(__func__, xdr);
4234 return -EIO;
4235 }
4236
4237 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4238 {
4239 __be32 *p;
4240
4241 p = xdr_inline_decode(xdr, len);
4242 if (likely(p)) {
4243 memcpy(buf, p, len);
4244 return 0;
4245 }
4246 print_overflow_msg(__func__, xdr);
4247 return -EIO;
4248 }
4249
4250 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4251 {
4252 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4253 }
4254
4255 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4256 {
4257 int status;
4258
4259 status = decode_op_hdr(xdr, OP_CLOSE);
4260 if (status != -EIO)
4261 nfs_increment_open_seqid(status, res->seqid);
4262 if (!status)
4263 status = decode_stateid(xdr, &res->stateid);
4264 return status;
4265 }
4266
4267 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4268 {
4269 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4270 }
4271
4272 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4273 {
4274 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4275 }
4276
4277 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4278 {
4279 int status;
4280
4281 status = decode_op_hdr(xdr, OP_COMMIT);
4282 if (!status)
4283 status = decode_write_verifier(xdr, &res->verf->verifier);
4284 return status;
4285 }
4286
4287 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4288 {
4289 __be32 *p;
4290 uint32_t bmlen;
4291 int status;
4292
4293 status = decode_op_hdr(xdr, OP_CREATE);
4294 if (status)
4295 return status;
4296 if ((status = decode_change_info(xdr, cinfo)))
4297 return status;
4298 p = xdr_inline_decode(xdr, 4);
4299 if (unlikely(!p))
4300 goto out_overflow;
4301 bmlen = be32_to_cpup(p);
4302 p = xdr_inline_decode(xdr, bmlen << 2);
4303 if (likely(p))
4304 return 0;
4305 out_overflow:
4306 print_overflow_msg(__func__, xdr);
4307 return -EIO;
4308 }
4309
4310 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4311 {
4312 unsigned int savep;
4313 uint32_t attrlen, bitmap[3] = {0};
4314 int status;
4315
4316 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4317 goto xdr_error;
4318 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4319 goto xdr_error;
4320 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4321 goto xdr_error;
4322 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4323 goto xdr_error;
4324 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4325 &res->fh_expire_type)) != 0)
4326 goto xdr_error;
4327 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4328 goto xdr_error;
4329 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4330 goto xdr_error;
4331 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4332 goto xdr_error;
4333 status = verify_attr_len(xdr, savep, attrlen);
4334 xdr_error:
4335 dprintk("%s: xdr returned %d!\n", __func__, -status);
4336 return status;
4337 }
4338
4339 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4340 {
4341 unsigned int savep;
4342 uint32_t attrlen, bitmap[3] = {0};
4343 int status;
4344
4345 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4346 goto xdr_error;
4347 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4348 goto xdr_error;
4349 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4350 goto xdr_error;
4351
4352 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4353 goto xdr_error;
4354 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4361 goto xdr_error;
4362 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4363 goto xdr_error;
4364
4365 status = verify_attr_len(xdr, savep, attrlen);
4366 xdr_error:
4367 dprintk("%s: xdr returned %d!\n", __func__, -status);
4368 return status;
4369 }
4370
4371 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4372 {
4373 unsigned int savep;
4374 uint32_t attrlen, bitmap[3] = {0};
4375 int status;
4376
4377 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4378 goto xdr_error;
4379 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4380 goto xdr_error;
4381 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4382 goto xdr_error;
4383
4384 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4387 goto xdr_error;
4388
4389 status = verify_attr_len(xdr, savep, attrlen);
4390 xdr_error:
4391 dprintk("%s: xdr returned %d!\n", __func__, -status);
4392 return status;
4393 }
4394
4395 static int decode_threshold_hint(struct xdr_stream *xdr,
4396 uint32_t *bitmap,
4397 uint64_t *res,
4398 uint32_t hint_bit)
4399 {
4400 __be32 *p;
4401
4402 *res = 0;
4403 if (likely(bitmap[0] & hint_bit)) {
4404 p = xdr_inline_decode(xdr, 8);
4405 if (unlikely(!p))
4406 goto out_overflow;
4407 xdr_decode_hyper(p, res);
4408 }
4409 return 0;
4410 out_overflow:
4411 print_overflow_msg(__func__, xdr);
4412 return -EIO;
4413 }
4414
4415 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4416 struct nfs4_threshold *res)
4417 {
4418 __be32 *p;
4419 unsigned int savep;
4420 uint32_t bitmap[3] = {0,}, attrlen;
4421 int status;
4422
4423 /* layout type */
4424 p = xdr_inline_decode(xdr, 4);
4425 if (unlikely(!p)) {
4426 print_overflow_msg(__func__, xdr);
4427 return -EIO;
4428 }
4429 res->l_type = be32_to_cpup(p);
4430
4431 /* thi_hintset bitmap */
4432 status = decode_attr_bitmap(xdr, bitmap);
4433 if (status < 0)
4434 goto xdr_error;
4435
4436 /* thi_hintlist length */
4437 status = decode_attr_length(xdr, &attrlen, &savep);
4438 if (status < 0)
4439 goto xdr_error;
4440 /* thi_hintlist */
4441 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4442 if (status < 0)
4443 goto xdr_error;
4444 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4445 if (status < 0)
4446 goto xdr_error;
4447 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4448 THRESHOLD_RD_IO);
4449 if (status < 0)
4450 goto xdr_error;
4451 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4452 THRESHOLD_WR_IO);
4453 if (status < 0)
4454 goto xdr_error;
4455
4456 status = verify_attr_len(xdr, savep, attrlen);
4457 res->bm = bitmap[0];
4458
4459 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4460 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4461 res->wr_io_sz);
4462 xdr_error:
4463 dprintk("%s ret=%d!\n", __func__, status);
4464 return status;
4465 }
4466
4467 /*
4468 * Thresholds on pNFS direct I/O vrs MDS I/O
4469 */
4470 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4471 uint32_t *bitmap,
4472 struct nfs4_threshold *res)
4473 {
4474 __be32 *p;
4475 int status = 0;
4476 uint32_t num;
4477
4478 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4479 return -EIO;
4480 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4481 /* Did the server return an unrequested attribute? */
4482 if (unlikely(res == NULL))
4483 return -EREMOTEIO;
4484 p = xdr_inline_decode(xdr, 4);
4485 if (unlikely(!p))
4486 goto out_overflow;
4487 num = be32_to_cpup(p);
4488 if (num == 0)
4489 return 0;
4490 if (num > 1)
4491 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4492 "drivers per filesystem not supported\n",
4493 __func__);
4494
4495 status = decode_first_threshold_item4(xdr, res);
4496 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4497 }
4498 return status;
4499 out_overflow:
4500 print_overflow_msg(__func__, xdr);
4501 return -EIO;
4502 }
4503
4504 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4505 struct nfs_fattr *fattr, struct nfs_fh *fh,
4506 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4507 const struct nfs_server *server)
4508 {
4509 int status;
4510 umode_t fmode = 0;
4511 uint32_t type;
4512 int32_t err;
4513
4514 status = decode_attr_type(xdr, bitmap, &type);
4515 if (status < 0)
4516 goto xdr_error;
4517 fattr->mode = 0;
4518 if (status != 0) {
4519 fattr->mode |= nfs_type2fmt[type];
4520 fattr->valid |= status;
4521 }
4522
4523 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4524 if (status < 0)
4525 goto xdr_error;
4526 fattr->valid |= status;
4527
4528 status = decode_attr_size(xdr, bitmap, &fattr->size);
4529 if (status < 0)
4530 goto xdr_error;
4531 fattr->valid |= status;
4532
4533 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4534 if (status < 0)
4535 goto xdr_error;
4536 fattr->valid |= status;
4537
4538 err = 0;
4539 status = decode_attr_error(xdr, bitmap, &err);
4540 if (status < 0)
4541 goto xdr_error;
4542
4543 status = decode_attr_filehandle(xdr, bitmap, fh);
4544 if (status < 0)
4545 goto xdr_error;
4546
4547 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4548 if (status < 0)
4549 goto xdr_error;
4550 fattr->valid |= status;
4551
4552 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4553 if (status < 0)
4554 goto xdr_error;
4555 fattr->valid |= status;
4556
4557 status = decode_attr_mode(xdr, bitmap, &fmode);
4558 if (status < 0)
4559 goto xdr_error;
4560 if (status != 0) {
4561 fattr->mode |= fmode;
4562 fattr->valid |= status;
4563 }
4564
4565 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4566 if (status < 0)
4567 goto xdr_error;
4568 fattr->valid |= status;
4569
4570 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4571 if (status < 0)
4572 goto xdr_error;
4573 fattr->valid |= status;
4574
4575 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4576 if (status < 0)
4577 goto xdr_error;
4578 fattr->valid |= status;
4579
4580 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4581 if (status < 0)
4582 goto xdr_error;
4583 fattr->valid |= status;
4584
4585 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4586 if (status < 0)
4587 goto xdr_error;
4588 fattr->valid |= status;
4589
4590 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4591 if (status < 0)
4592 goto xdr_error;
4593 fattr->valid |= status;
4594
4595 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4596 if (status < 0)
4597 goto xdr_error;
4598 fattr->valid |= status;
4599
4600 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4601 if (status < 0)
4602 goto xdr_error;
4603 fattr->valid |= status;
4604
4605 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4606 if (status < 0)
4607 goto xdr_error;
4608 fattr->valid |= status;
4609
4610 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4611 if (status < 0)
4612 goto xdr_error;
4613
4614 if (label) {
4615 status = decode_attr_security_label(xdr, bitmap, label);
4616 if (status < 0)
4617 goto xdr_error;
4618 fattr->valid |= status;
4619 }
4620
4621 xdr_error:
4622 dprintk("%s: xdr returned %d\n", __func__, -status);
4623 return status;
4624 }
4625
4626 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4627 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4628 struct nfs4_label *label, const struct nfs_server *server)
4629 {
4630 unsigned int savep;
4631 uint32_t attrlen,
4632 bitmap[3] = {0};
4633 int status;
4634
4635 status = decode_op_hdr(xdr, OP_GETATTR);
4636 if (status < 0)
4637 goto xdr_error;
4638
4639 status = decode_attr_bitmap(xdr, bitmap);
4640 if (status < 0)
4641 goto xdr_error;
4642
4643 status = decode_attr_length(xdr, &attrlen, &savep);
4644 if (status < 0)
4645 goto xdr_error;
4646
4647 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4648 label, server);
4649 if (status < 0)
4650 goto xdr_error;
4651
4652 status = verify_attr_len(xdr, savep, attrlen);
4653 xdr_error:
4654 dprintk("%s: xdr returned %d\n", __func__, -status);
4655 return status;
4656 }
4657
4658 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4659 struct nfs4_label *label, const struct nfs_server *server)
4660 {
4661 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4662 }
4663
4664 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4665 const struct nfs_server *server)
4666 {
4667 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4668 }
4669
4670 /*
4671 * Decode potentially multiple layout types. Currently we only support
4672 * one layout driver per file system.
4673 */
4674 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4675 uint32_t *layouttype)
4676 {
4677 __be32 *p;
4678 int num;
4679
4680 p = xdr_inline_decode(xdr, 4);
4681 if (unlikely(!p))
4682 goto out_overflow;
4683 num = be32_to_cpup(p);
4684
4685 /* pNFS is not supported by the underlying file system */
4686 if (num == 0) {
4687 *layouttype = 0;
4688 return 0;
4689 }
4690 if (num > 1)
4691 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4692 "drivers per filesystem not supported\n", __func__);
4693
4694 /* Decode and set first layout type, move xdr->p past unused types */
4695 p = xdr_inline_decode(xdr, num * 4);
4696 if (unlikely(!p))
4697 goto out_overflow;
4698 *layouttype = be32_to_cpup(p);
4699 return 0;
4700 out_overflow:
4701 print_overflow_msg(__func__, xdr);
4702 return -EIO;
4703 }
4704
4705 /*
4706 * The type of file system exported.
4707 * Note we must ensure that layouttype is set in any non-error case.
4708 */
4709 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4710 uint32_t *layouttype)
4711 {
4712 int status = 0;
4713
4714 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4715 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4716 return -EIO;
4717 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4718 status = decode_first_pnfs_layout_type(xdr, layouttype);
4719 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4720 } else
4721 *layouttype = 0;
4722 return status;
4723 }
4724
4725 /*
4726 * The prefered block size for layout directed io
4727 */
4728 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4729 uint32_t *res)
4730 {
4731 __be32 *p;
4732
4733 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4734 *res = 0;
4735 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4736 p = xdr_inline_decode(xdr, 4);
4737 if (unlikely(!p)) {
4738 print_overflow_msg(__func__, xdr);
4739 return -EIO;
4740 }
4741 *res = be32_to_cpup(p);
4742 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4743 }
4744 return 0;
4745 }
4746
4747 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4748 {
4749 unsigned int savep;
4750 uint32_t attrlen, bitmap[3];
4751 int status;
4752
4753 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4754 goto xdr_error;
4755 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4756 goto xdr_error;
4757 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4758 goto xdr_error;
4759
4760 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4761
4762 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4763 goto xdr_error;
4764 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4765 goto xdr_error;
4766 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4767 goto xdr_error;
4768 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4769 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4770 goto xdr_error;
4771 fsinfo->wtpref = fsinfo->wtmax;
4772 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4773 if (status != 0)
4774 goto xdr_error;
4775 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4776 if (status != 0)
4777 goto xdr_error;
4778 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4779 if (status)
4780 goto xdr_error;
4781
4782 status = verify_attr_len(xdr, savep, attrlen);
4783 xdr_error:
4784 dprintk("%s: xdr returned %d!\n", __func__, -status);
4785 return status;
4786 }
4787
4788 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4789 {
4790 __be32 *p;
4791 uint32_t len;
4792 int status;
4793
4794 /* Zero handle first to allow comparisons */
4795 memset(fh, 0, sizeof(*fh));
4796
4797 status = decode_op_hdr(xdr, OP_GETFH);
4798 if (status)
4799 return status;
4800
4801 p = xdr_inline_decode(xdr, 4);
4802 if (unlikely(!p))
4803 goto out_overflow;
4804 len = be32_to_cpup(p);
4805 if (len > NFS4_FHSIZE)
4806 return -EIO;
4807 fh->size = len;
4808 p = xdr_inline_decode(xdr, len);
4809 if (unlikely(!p))
4810 goto out_overflow;
4811 memcpy(fh->data, p, len);
4812 return 0;
4813 out_overflow:
4814 print_overflow_msg(__func__, xdr);
4815 return -EIO;
4816 }
4817
4818 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4819 {
4820 int status;
4821
4822 status = decode_op_hdr(xdr, OP_LINK);
4823 if (status)
4824 return status;
4825 return decode_change_info(xdr, cinfo);
4826 }
4827
4828 /*
4829 * We create the owner, so we know a proper owner.id length is 4.
4830 */
4831 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4832 {
4833 uint64_t offset, length, clientid;
4834 __be32 *p;
4835 uint32_t namelen, type;
4836
4837 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4838 if (unlikely(!p))
4839 goto out_overflow;
4840 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4841 p = xdr_decode_hyper(p, &length);
4842 type = be32_to_cpup(p++); /* 4 byte read */
4843 if (fl != NULL) { /* manipulate file lock */
4844 fl->fl_start = (loff_t)offset;
4845 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4846 if (length == ~(uint64_t)0)
4847 fl->fl_end = OFFSET_MAX;
4848 fl->fl_type = F_WRLCK;
4849 if (type & 1)
4850 fl->fl_type = F_RDLCK;
4851 fl->fl_pid = 0;
4852 }
4853 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4854 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4855 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4856 if (likely(p))
4857 return -NFS4ERR_DENIED;
4858 out_overflow:
4859 print_overflow_msg(__func__, xdr);
4860 return -EIO;
4861 }
4862
4863 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4864 {
4865 int status;
4866
4867 status = decode_op_hdr(xdr, OP_LOCK);
4868 if (status == -EIO)
4869 goto out;
4870 if (status == 0) {
4871 status = decode_stateid(xdr, &res->stateid);
4872 if (unlikely(status))
4873 goto out;
4874 } else if (status == -NFS4ERR_DENIED)
4875 status = decode_lock_denied(xdr, NULL);
4876 if (res->open_seqid != NULL)
4877 nfs_increment_open_seqid(status, res->open_seqid);
4878 nfs_increment_lock_seqid(status, res->lock_seqid);
4879 out:
4880 return status;
4881 }
4882
4883 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4884 {
4885 int status;
4886 status = decode_op_hdr(xdr, OP_LOCKT);
4887 if (status == -NFS4ERR_DENIED)
4888 return decode_lock_denied(xdr, res->denied);
4889 return status;
4890 }
4891
4892 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4893 {
4894 int status;
4895
4896 status = decode_op_hdr(xdr, OP_LOCKU);
4897 if (status != -EIO)
4898 nfs_increment_lock_seqid(status, res->seqid);
4899 if (status == 0)
4900 status = decode_stateid(xdr, &res->stateid);
4901 return status;
4902 }
4903
4904 static int decode_release_lockowner(struct xdr_stream *xdr)
4905 {
4906 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4907 }
4908
4909 static int decode_lookup(struct xdr_stream *xdr)
4910 {
4911 return decode_op_hdr(xdr, OP_LOOKUP);
4912 }
4913
4914 /* This is too sick! */
4915 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4916 {
4917 __be32 *p;
4918 uint32_t limit_type, nblocks, blocksize;
4919
4920 p = xdr_inline_decode(xdr, 12);
4921 if (unlikely(!p))
4922 goto out_overflow;
4923 limit_type = be32_to_cpup(p++);
4924 switch (limit_type) {
4925 case 1:
4926 xdr_decode_hyper(p, maxsize);
4927 break;
4928 case 2:
4929 nblocks = be32_to_cpup(p++);
4930 blocksize = be32_to_cpup(p);
4931 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4932 }
4933 return 0;
4934 out_overflow:
4935 print_overflow_msg(__func__, xdr);
4936 return -EIO;
4937 }
4938
4939 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4940 {
4941 __be32 *p;
4942 uint32_t delegation_type;
4943 int status;
4944
4945 p = xdr_inline_decode(xdr, 4);
4946 if (unlikely(!p))
4947 goto out_overflow;
4948 delegation_type = be32_to_cpup(p);
4949 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4950 res->delegation_type = 0;
4951 return 0;
4952 }
4953 status = decode_stateid(xdr, &res->delegation);
4954 if (unlikely(status))
4955 return status;
4956 p = xdr_inline_decode(xdr, 4);
4957 if (unlikely(!p))
4958 goto out_overflow;
4959 res->do_recall = be32_to_cpup(p);
4960
4961 switch (delegation_type) {
4962 case NFS4_OPEN_DELEGATE_READ:
4963 res->delegation_type = FMODE_READ;
4964 break;
4965 case NFS4_OPEN_DELEGATE_WRITE:
4966 res->delegation_type = FMODE_WRITE|FMODE_READ;
4967 if (decode_space_limit(xdr, &res->maxsize) < 0)
4968 return -EIO;
4969 }
4970 return decode_ace(xdr, NULL, res->server->nfs_client);
4971 out_overflow:
4972 print_overflow_msg(__func__, xdr);
4973 return -EIO;
4974 }
4975
4976 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4977 {
4978 __be32 *p;
4979 uint32_t savewords, bmlen, i;
4980 int status;
4981
4982 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4983 return status;
4984 nfs_increment_open_seqid(status, res->seqid);
4985 if (status)
4986 return status;
4987 status = decode_stateid(xdr, &res->stateid);
4988 if (unlikely(status))
4989 return status;
4990
4991 decode_change_info(xdr, &res->cinfo);
4992
4993 p = xdr_inline_decode(xdr, 8);
4994 if (unlikely(!p))
4995 goto out_overflow;
4996 res->rflags = be32_to_cpup(p++);
4997 bmlen = be32_to_cpup(p);
4998 if (bmlen > 10)
4999 goto xdr_error;
5000
5001 p = xdr_inline_decode(xdr, bmlen << 2);
5002 if (unlikely(!p))
5003 goto out_overflow;
5004 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5005 for (i = 0; i < savewords; ++i)
5006 res->attrset[i] = be32_to_cpup(p++);
5007 for (; i < NFS4_BITMAP_SIZE; i++)
5008 res->attrset[i] = 0;
5009
5010 return decode_delegation(xdr, res);
5011 xdr_error:
5012 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5013 return -EIO;
5014 out_overflow:
5015 print_overflow_msg(__func__, xdr);
5016 return -EIO;
5017 }
5018
5019 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5020 {
5021 int status;
5022
5023 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5024 if (status != -EIO)
5025 nfs_increment_open_seqid(status, res->seqid);
5026 if (!status)
5027 status = decode_stateid(xdr, &res->stateid);
5028 return status;
5029 }
5030
5031 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5032 {
5033 int status;
5034
5035 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5036 if (status != -EIO)
5037 nfs_increment_open_seqid(status, res->seqid);
5038 if (!status)
5039 status = decode_stateid(xdr, &res->stateid);
5040 return status;
5041 }
5042
5043 static int decode_putfh(struct xdr_stream *xdr)
5044 {
5045 return decode_op_hdr(xdr, OP_PUTFH);
5046 }
5047
5048 static int decode_putrootfh(struct xdr_stream *xdr)
5049 {
5050 return decode_op_hdr(xdr, OP_PUTROOTFH);
5051 }
5052
5053 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5054 struct nfs_pgio_res *res)
5055 {
5056 __be32 *p;
5057 uint32_t count, eof, recvd;
5058 int status;
5059
5060 status = decode_op_hdr(xdr, OP_READ);
5061 if (status)
5062 return status;
5063 p = xdr_inline_decode(xdr, 8);
5064 if (unlikely(!p))
5065 goto out_overflow;
5066 eof = be32_to_cpup(p++);
5067 count = be32_to_cpup(p);
5068 recvd = xdr_read_pages(xdr, count);
5069 if (count > recvd) {
5070 dprintk("NFS: server cheating in read reply: "
5071 "count %u > recvd %u\n", count, recvd);
5072 count = recvd;
5073 eof = 0;
5074 }
5075 res->eof = eof;
5076 res->count = count;
5077 return 0;
5078 out_overflow:
5079 print_overflow_msg(__func__, xdr);
5080 return -EIO;
5081 }
5082
5083 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5084 {
5085 int status;
5086 __be32 verf[2];
5087
5088 status = decode_op_hdr(xdr, OP_READDIR);
5089 if (!status)
5090 status = decode_verifier(xdr, readdir->verifier.data);
5091 if (unlikely(status))
5092 return status;
5093 memcpy(verf, readdir->verifier.data, sizeof(verf));
5094 dprintk("%s: verifier = %08x:%08x\n",
5095 __func__, verf[0], verf[1]);
5096 return xdr_read_pages(xdr, xdr->buf->page_len);
5097 }
5098
5099 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5100 {
5101 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5102 u32 len, recvd;
5103 __be32 *p;
5104 int status;
5105
5106 status = decode_op_hdr(xdr, OP_READLINK);
5107 if (status)
5108 return status;
5109
5110 /* Convert length of symlink */
5111 p = xdr_inline_decode(xdr, 4);
5112 if (unlikely(!p))
5113 goto out_overflow;
5114 len = be32_to_cpup(p);
5115 if (len >= rcvbuf->page_len || len <= 0) {
5116 dprintk("nfs: server returned giant symlink!\n");
5117 return -ENAMETOOLONG;
5118 }
5119 recvd = xdr_read_pages(xdr, len);
5120 if (recvd < len) {
5121 dprintk("NFS: server cheating in readlink reply: "
5122 "count %u > recvd %u\n", len, recvd);
5123 return -EIO;
5124 }
5125 /*
5126 * The XDR encode routine has set things up so that
5127 * the link text will be copied directly into the
5128 * buffer. We just have to do overflow-checking,
5129 * and and null-terminate the text (the VFS expects
5130 * null-termination).
5131 */
5132 xdr_terminate_string(rcvbuf, len);
5133 return 0;
5134 out_overflow:
5135 print_overflow_msg(__func__, xdr);
5136 return -EIO;
5137 }
5138
5139 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5140 {
5141 int status;
5142
5143 status = decode_op_hdr(xdr, OP_REMOVE);
5144 if (status)
5145 goto out;
5146 status = decode_change_info(xdr, cinfo);
5147 out:
5148 return status;
5149 }
5150
5151 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5152 struct nfs4_change_info *new_cinfo)
5153 {
5154 int status;
5155
5156 status = decode_op_hdr(xdr, OP_RENAME);
5157 if (status)
5158 goto out;
5159 if ((status = decode_change_info(xdr, old_cinfo)))
5160 goto out;
5161 status = decode_change_info(xdr, new_cinfo);
5162 out:
5163 return status;
5164 }
5165
5166 static int decode_renew(struct xdr_stream *xdr)
5167 {
5168 return decode_op_hdr(xdr, OP_RENEW);
5169 }
5170
5171 static int
5172 decode_restorefh(struct xdr_stream *xdr)
5173 {
5174 return decode_op_hdr(xdr, OP_RESTOREFH);
5175 }
5176
5177 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5178 struct nfs_getaclres *res)
5179 {
5180 unsigned int savep;
5181 uint32_t attrlen,
5182 bitmap[3] = {0};
5183 int status;
5184 unsigned int pg_offset;
5185
5186 res->acl_len = 0;
5187 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5188 goto out;
5189
5190 xdr_enter_page(xdr, xdr->buf->page_len);
5191
5192 /* Calculate the offset of the page data */
5193 pg_offset = xdr->buf->head[0].iov_len;
5194
5195 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5196 goto out;
5197 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5198 goto out;
5199
5200 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5201 return -EIO;
5202 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5203
5204 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5205 * are stored with the acl data to handle the problem of
5206 * variable length bitmaps.*/
5207 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5208 res->acl_len = attrlen;
5209
5210 /* Check for receive buffer overflow */
5211 if (res->acl_len > (xdr->nwords << 2) ||
5212 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5213 res->acl_flags |= NFS4_ACL_TRUNC;
5214 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5215 attrlen, xdr->nwords << 2);
5216 }
5217 } else
5218 status = -EOPNOTSUPP;
5219
5220 out:
5221 return status;
5222 }
5223
5224 static int
5225 decode_savefh(struct xdr_stream *xdr)
5226 {
5227 return decode_op_hdr(xdr, OP_SAVEFH);
5228 }
5229
5230 static int decode_setattr(struct xdr_stream *xdr)
5231 {
5232 __be32 *p;
5233 uint32_t bmlen;
5234 int status;
5235
5236 status = decode_op_hdr(xdr, OP_SETATTR);
5237 if (status)
5238 return status;
5239 p = xdr_inline_decode(xdr, 4);
5240 if (unlikely(!p))
5241 goto out_overflow;
5242 bmlen = be32_to_cpup(p);
5243 p = xdr_inline_decode(xdr, bmlen << 2);
5244 if (likely(p))
5245 return 0;
5246 out_overflow:
5247 print_overflow_msg(__func__, xdr);
5248 return -EIO;
5249 }
5250
5251 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5252 {
5253 __be32 *p;
5254 uint32_t opnum;
5255 int32_t nfserr;
5256
5257 p = xdr_inline_decode(xdr, 8);
5258 if (unlikely(!p))
5259 goto out_overflow;
5260 opnum = be32_to_cpup(p++);
5261 if (opnum != OP_SETCLIENTID) {
5262 dprintk("nfs: decode_setclientid: Server returned operation"
5263 " %d\n", opnum);
5264 return -EIO;
5265 }
5266 nfserr = be32_to_cpup(p);
5267 if (nfserr == NFS_OK) {
5268 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5269 if (unlikely(!p))
5270 goto out_overflow;
5271 p = xdr_decode_hyper(p, &res->clientid);
5272 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5273 } else if (nfserr == NFSERR_CLID_INUSE) {
5274 uint32_t len;
5275
5276 /* skip netid string */
5277 p = xdr_inline_decode(xdr, 4);
5278 if (unlikely(!p))
5279 goto out_overflow;
5280 len = be32_to_cpup(p);
5281 p = xdr_inline_decode(xdr, len);
5282 if (unlikely(!p))
5283 goto out_overflow;
5284
5285 /* skip uaddr string */
5286 p = xdr_inline_decode(xdr, 4);
5287 if (unlikely(!p))
5288 goto out_overflow;
5289 len = be32_to_cpup(p);
5290 p = xdr_inline_decode(xdr, len);
5291 if (unlikely(!p))
5292 goto out_overflow;
5293 return -NFSERR_CLID_INUSE;
5294 } else
5295 return nfs4_stat_to_errno(nfserr);
5296
5297 return 0;
5298 out_overflow:
5299 print_overflow_msg(__func__, xdr);
5300 return -EIO;
5301 }
5302
5303 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5304 {
5305 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5306 }
5307
5308 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5309 {
5310 __be32 *p;
5311 int status;
5312
5313 status = decode_op_hdr(xdr, OP_WRITE);
5314 if (status)
5315 return status;
5316
5317 p = xdr_inline_decode(xdr, 8);
5318 if (unlikely(!p))
5319 goto out_overflow;
5320 res->count = be32_to_cpup(p++);
5321 res->verf->committed = be32_to_cpup(p++);
5322 return decode_write_verifier(xdr, &res->verf->verifier);
5323 out_overflow:
5324 print_overflow_msg(__func__, xdr);
5325 return -EIO;
5326 }
5327
5328 static int decode_delegreturn(struct xdr_stream *xdr)
5329 {
5330 return decode_op_hdr(xdr, OP_DELEGRETURN);
5331 }
5332
5333 static int decode_secinfo_gss(struct xdr_stream *xdr,
5334 struct nfs4_secinfo4 *flavor)
5335 {
5336 u32 oid_len;
5337 __be32 *p;
5338
5339 p = xdr_inline_decode(xdr, 4);
5340 if (unlikely(!p))
5341 goto out_overflow;
5342 oid_len = be32_to_cpup(p);
5343 if (oid_len > GSS_OID_MAX_LEN)
5344 goto out_err;
5345
5346 p = xdr_inline_decode(xdr, oid_len);
5347 if (unlikely(!p))
5348 goto out_overflow;
5349 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5350 flavor->flavor_info.oid.len = oid_len;
5351
5352 p = xdr_inline_decode(xdr, 8);
5353 if (unlikely(!p))
5354 goto out_overflow;
5355 flavor->flavor_info.qop = be32_to_cpup(p++);
5356 flavor->flavor_info.service = be32_to_cpup(p);
5357
5358 return 0;
5359
5360 out_overflow:
5361 print_overflow_msg(__func__, xdr);
5362 return -EIO;
5363 out_err:
5364 return -EINVAL;
5365 }
5366
5367 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5368 {
5369 struct nfs4_secinfo4 *sec_flavor;
5370 unsigned int i, num_flavors;
5371 int status;
5372 __be32 *p;
5373
5374 p = xdr_inline_decode(xdr, 4);
5375 if (unlikely(!p))
5376 goto out_overflow;
5377
5378 res->flavors->num_flavors = 0;
5379 num_flavors = be32_to_cpup(p);
5380
5381 for (i = 0; i < num_flavors; i++) {
5382 sec_flavor = &res->flavors->flavors[i];
5383 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5384 break;
5385
5386 p = xdr_inline_decode(xdr, 4);
5387 if (unlikely(!p))
5388 goto out_overflow;
5389 sec_flavor->flavor = be32_to_cpup(p);
5390
5391 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5392 status = decode_secinfo_gss(xdr, sec_flavor);
5393 if (status)
5394 goto out;
5395 }
5396 res->flavors->num_flavors++;
5397 }
5398
5399 status = 0;
5400 out:
5401 return status;
5402 out_overflow:
5403 print_overflow_msg(__func__, xdr);
5404 return -EIO;
5405 }
5406
5407 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5408 {
5409 int status = decode_op_hdr(xdr, OP_SECINFO);
5410 if (status)
5411 return status;
5412 return decode_secinfo_common(xdr, res);
5413 }
5414
5415 #if defined(CONFIG_NFS_V4_1)
5416 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5417 {
5418 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5419 if (status)
5420 return status;
5421 return decode_secinfo_common(xdr, res);
5422 }
5423
5424 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5425 {
5426 __be32 *p;
5427 uint32_t bitmap_words;
5428 unsigned int i;
5429
5430 p = xdr_inline_decode(xdr, 4);
5431 bitmap_words = be32_to_cpup(p++);
5432 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5433 return -EIO;
5434 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5435 for (i = 0; i < bitmap_words; i++)
5436 op_map->u.words[i] = be32_to_cpup(p++);
5437
5438 return 0;
5439 }
5440
5441 static int decode_exchange_id(struct xdr_stream *xdr,
5442 struct nfs41_exchange_id_res *res)
5443 {
5444 __be32 *p;
5445 uint32_t dummy;
5446 char *dummy_str;
5447 int status;
5448 uint32_t impl_id_count;
5449
5450 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5451 if (status)
5452 return status;
5453
5454 p = xdr_inline_decode(xdr, 8);
5455 if (unlikely(!p))
5456 goto out_overflow;
5457 xdr_decode_hyper(p, &res->clientid);
5458 p = xdr_inline_decode(xdr, 12);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 res->seqid = be32_to_cpup(p++);
5462 res->flags = be32_to_cpup(p++);
5463
5464 res->state_protect.how = be32_to_cpup(p);
5465 switch (res->state_protect.how) {
5466 case SP4_NONE:
5467 break;
5468 case SP4_MACH_CRED:
5469 status = decode_op_map(xdr, &res->state_protect.enforce);
5470 if (status)
5471 return status;
5472 status = decode_op_map(xdr, &res->state_protect.allow);
5473 if (status)
5474 return status;
5475 break;
5476 default:
5477 WARN_ON_ONCE(1);
5478 return -EIO;
5479 }
5480
5481 /* server_owner4.so_minor_id */
5482 p = xdr_inline_decode(xdr, 8);
5483 if (unlikely(!p))
5484 goto out_overflow;
5485 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5486
5487 /* server_owner4.so_major_id */
5488 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5489 if (unlikely(status))
5490 return status;
5491 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5492 return -EIO;
5493 memcpy(res->server_owner->major_id, dummy_str, dummy);
5494 res->server_owner->major_id_sz = dummy;
5495
5496 /* server_scope4 */
5497 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5498 if (unlikely(status))
5499 return status;
5500 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5501 return -EIO;
5502 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5503 res->server_scope->server_scope_sz = dummy;
5504
5505 /* Implementation Id */
5506 p = xdr_inline_decode(xdr, 4);
5507 if (unlikely(!p))
5508 goto out_overflow;
5509 impl_id_count = be32_to_cpup(p++);
5510
5511 if (impl_id_count) {
5512 /* nii_domain */
5513 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5514 if (unlikely(status))
5515 return status;
5516 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5517 return -EIO;
5518 memcpy(res->impl_id->domain, dummy_str, dummy);
5519
5520 /* nii_name */
5521 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5522 if (unlikely(status))
5523 return status;
5524 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5525 return -EIO;
5526 memcpy(res->impl_id->name, dummy_str, dummy);
5527
5528 /* nii_date */
5529 p = xdr_inline_decode(xdr, 12);
5530 if (unlikely(!p))
5531 goto out_overflow;
5532 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5533 res->impl_id->date.nseconds = be32_to_cpup(p);
5534
5535 /* if there's more than one entry, ignore the rest */
5536 }
5537 return 0;
5538 out_overflow:
5539 print_overflow_msg(__func__, xdr);
5540 return -EIO;
5541 }
5542
5543 static int decode_chan_attrs(struct xdr_stream *xdr,
5544 struct nfs4_channel_attrs *attrs)
5545 {
5546 __be32 *p;
5547 u32 nr_attrs, val;
5548
5549 p = xdr_inline_decode(xdr, 28);
5550 if (unlikely(!p))
5551 goto out_overflow;
5552 val = be32_to_cpup(p++); /* headerpadsz */
5553 if (val)
5554 return -EINVAL; /* no support for header padding yet */
5555 attrs->max_rqst_sz = be32_to_cpup(p++);
5556 attrs->max_resp_sz = be32_to_cpup(p++);
5557 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5558 attrs->max_ops = be32_to_cpup(p++);
5559 attrs->max_reqs = be32_to_cpup(p++);
5560 nr_attrs = be32_to_cpup(p);
5561 if (unlikely(nr_attrs > 1)) {
5562 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5563 "count %u\n", __func__, nr_attrs);
5564 return -EINVAL;
5565 }
5566 if (nr_attrs == 1) {
5567 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5568 if (unlikely(!p))
5569 goto out_overflow;
5570 }
5571 return 0;
5572 out_overflow:
5573 print_overflow_msg(__func__, xdr);
5574 return -EIO;
5575 }
5576
5577 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5578 {
5579 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5580 }
5581
5582 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5583 struct nfs41_bind_conn_to_session_res *res)
5584 {
5585 __be32 *p;
5586 int status;
5587
5588 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5589 if (!status)
5590 status = decode_sessionid(xdr, &res->session->sess_id);
5591 if (unlikely(status))
5592 return status;
5593
5594 /* dir flags, rdma mode bool */
5595 p = xdr_inline_decode(xdr, 8);
5596 if (unlikely(!p))
5597 goto out_overflow;
5598
5599 res->dir = be32_to_cpup(p++);
5600 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5601 return -EIO;
5602 if (be32_to_cpup(p) == 0)
5603 res->use_conn_in_rdma_mode = false;
5604 else
5605 res->use_conn_in_rdma_mode = true;
5606
5607 return 0;
5608 out_overflow:
5609 print_overflow_msg(__func__, xdr);
5610 return -EIO;
5611 }
5612
5613 static int decode_create_session(struct xdr_stream *xdr,
5614 struct nfs41_create_session_res *res)
5615 {
5616 __be32 *p;
5617 int status;
5618 struct nfs_client *clp = res->client;
5619 struct nfs4_session *session = clp->cl_session;
5620
5621 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5622 if (!status)
5623 status = decode_sessionid(xdr, &session->sess_id);
5624 if (unlikely(status))
5625 return status;
5626
5627 /* seqid, flags */
5628 p = xdr_inline_decode(xdr, 8);
5629 if (unlikely(!p))
5630 goto out_overflow;
5631 clp->cl_seqid = be32_to_cpup(p++);
5632 session->flags = be32_to_cpup(p);
5633
5634 /* Channel attributes */
5635 status = decode_chan_attrs(xdr, &session->fc_attrs);
5636 if (!status)
5637 status = decode_chan_attrs(xdr, &session->bc_attrs);
5638 return status;
5639 out_overflow:
5640 print_overflow_msg(__func__, xdr);
5641 return -EIO;
5642 }
5643
5644 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5645 {
5646 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5647 }
5648
5649 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5650 {
5651 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5652 }
5653
5654 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5655 {
5656 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5657 }
5658 #endif /* CONFIG_NFS_V4_1 */
5659
5660 static int decode_sequence(struct xdr_stream *xdr,
5661 struct nfs4_sequence_res *res,
5662 struct rpc_rqst *rqstp)
5663 {
5664 #if defined(CONFIG_NFS_V4_1)
5665 struct nfs4_session *session;
5666 struct nfs4_sessionid id;
5667 u32 dummy;
5668 int status;
5669 __be32 *p;
5670
5671 if (res->sr_slot == NULL)
5672 return 0;
5673 if (!res->sr_slot->table->session)
5674 return 0;
5675
5676 status = decode_op_hdr(xdr, OP_SEQUENCE);
5677 if (!status)
5678 status = decode_sessionid(xdr, &id);
5679 if (unlikely(status))
5680 goto out_err;
5681
5682 /*
5683 * If the server returns different values for sessionID, slotID or
5684 * sequence number, the server is looney tunes.
5685 */
5686 status = -EREMOTEIO;
5687 session = res->sr_slot->table->session;
5688
5689 if (memcmp(id.data, session->sess_id.data,
5690 NFS4_MAX_SESSIONID_LEN)) {
5691 dprintk("%s Invalid session id\n", __func__);
5692 goto out_err;
5693 }
5694
5695 p = xdr_inline_decode(xdr, 20);
5696 if (unlikely(!p))
5697 goto out_overflow;
5698
5699 /* seqid */
5700 dummy = be32_to_cpup(p++);
5701 if (dummy != res->sr_slot->seq_nr) {
5702 dprintk("%s Invalid sequence number\n", __func__);
5703 goto out_err;
5704 }
5705 /* slot id */
5706 dummy = be32_to_cpup(p++);
5707 if (dummy != res->sr_slot->slot_nr) {
5708 dprintk("%s Invalid slot id\n", __func__);
5709 goto out_err;
5710 }
5711 /* highest slot id */
5712 res->sr_highest_slotid = be32_to_cpup(p++);
5713 /* target highest slot id */
5714 res->sr_target_highest_slotid = be32_to_cpup(p++);
5715 /* result flags */
5716 res->sr_status_flags = be32_to_cpup(p);
5717 status = 0;
5718 out_err:
5719 res->sr_status = status;
5720 return status;
5721 out_overflow:
5722 print_overflow_msg(__func__, xdr);
5723 status = -EIO;
5724 goto out_err;
5725 #else /* CONFIG_NFS_V4_1 */
5726 return 0;
5727 #endif /* CONFIG_NFS_V4_1 */
5728 }
5729
5730 #if defined(CONFIG_NFS_V4_1)
5731 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5732 struct pnfs_device *pdev)
5733 {
5734 __be32 *p;
5735 uint32_t len, type;
5736 int status;
5737
5738 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5739 if (status) {
5740 if (status == -ETOOSMALL) {
5741 p = xdr_inline_decode(xdr, 4);
5742 if (unlikely(!p))
5743 goto out_overflow;
5744 pdev->mincount = be32_to_cpup(p);
5745 dprintk("%s: Min count too small. mincnt = %u\n",
5746 __func__, pdev->mincount);
5747 }
5748 return status;
5749 }
5750
5751 p = xdr_inline_decode(xdr, 8);
5752 if (unlikely(!p))
5753 goto out_overflow;
5754 type = be32_to_cpup(p++);
5755 if (type != pdev->layout_type) {
5756 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5757 __func__, pdev->layout_type, type);
5758 return -EINVAL;
5759 }
5760 /*
5761 * Get the length of the opaque device_addr4. xdr_read_pages places
5762 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5763 * and places the remaining xdr data in xdr_buf->tail
5764 */
5765 pdev->mincount = be32_to_cpup(p);
5766 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5767 goto out_overflow;
5768
5769 /* Parse notification bitmap, verifying that it is zero. */
5770 p = xdr_inline_decode(xdr, 4);
5771 if (unlikely(!p))
5772 goto out_overflow;
5773 len = be32_to_cpup(p);
5774 if (len) {
5775 uint32_t i;
5776
5777 p = xdr_inline_decode(xdr, 4 * len);
5778 if (unlikely(!p))
5779 goto out_overflow;
5780
5781 if (be32_to_cpup(p++) &
5782 ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5783 dprintk("%s: unsupported notification\n",
5784 __func__);
5785 }
5786
5787 for (i = 1; i < len; i++) {
5788 if (be32_to_cpup(p++)) {
5789 dprintk("%s: unsupported notification\n",
5790 __func__);
5791 return -EIO;
5792 }
5793 }
5794 }
5795 return 0;
5796 out_overflow:
5797 print_overflow_msg(__func__, xdr);
5798 return -EIO;
5799 }
5800
5801 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5802 struct nfs4_layoutget_res *res)
5803 {
5804 __be32 *p;
5805 int status;
5806 u32 layout_count;
5807 u32 recvd;
5808
5809 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5810 if (status)
5811 return status;
5812 p = xdr_inline_decode(xdr, 4);
5813 if (unlikely(!p))
5814 goto out_overflow;
5815 res->return_on_close = be32_to_cpup(p);
5816 decode_stateid(xdr, &res->stateid);
5817 p = xdr_inline_decode(xdr, 4);
5818 if (unlikely(!p))
5819 goto out_overflow;
5820 layout_count = be32_to_cpup(p);
5821 if (!layout_count) {
5822 dprintk("%s: server responded with empty layout array\n",
5823 __func__);
5824 return -EINVAL;
5825 }
5826
5827 p = xdr_inline_decode(xdr, 28);
5828 if (unlikely(!p))
5829 goto out_overflow;
5830 p = xdr_decode_hyper(p, &res->range.offset);
5831 p = xdr_decode_hyper(p, &res->range.length);
5832 res->range.iomode = be32_to_cpup(p++);
5833 res->type = be32_to_cpup(p++);
5834 res->layoutp->len = be32_to_cpup(p);
5835
5836 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5837 __func__,
5838 (unsigned long)res->range.offset,
5839 (unsigned long)res->range.length,
5840 res->range.iomode,
5841 res->type,
5842 res->layoutp->len);
5843
5844 recvd = xdr_read_pages(xdr, res->layoutp->len);
5845 if (res->layoutp->len > recvd) {
5846 dprintk("NFS: server cheating in layoutget reply: "
5847 "layout len %u > recvd %u\n",
5848 res->layoutp->len, recvd);
5849 return -EINVAL;
5850 }
5851
5852 if (layout_count > 1) {
5853 /* We only handle a length one array at the moment. Any
5854 * further entries are just ignored. Note that this means
5855 * the client may see a response that is less than the
5856 * minimum it requested.
5857 */
5858 dprintk("%s: server responded with %d layouts, dropping tail\n",
5859 __func__, layout_count);
5860 }
5861
5862 return 0;
5863 out_overflow:
5864 print_overflow_msg(__func__, xdr);
5865 return -EIO;
5866 }
5867
5868 static int decode_layoutreturn(struct xdr_stream *xdr,
5869 struct nfs4_layoutreturn_res *res)
5870 {
5871 __be32 *p;
5872 int status;
5873
5874 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5875 if (status)
5876 return status;
5877 p = xdr_inline_decode(xdr, 4);
5878 if (unlikely(!p))
5879 goto out_overflow;
5880 res->lrs_present = be32_to_cpup(p);
5881 if (res->lrs_present)
5882 status = decode_stateid(xdr, &res->stateid);
5883 return status;
5884 out_overflow:
5885 print_overflow_msg(__func__, xdr);
5886 return -EIO;
5887 }
5888
5889 static int decode_layoutcommit(struct xdr_stream *xdr,
5890 struct rpc_rqst *req,
5891 struct nfs4_layoutcommit_res *res)
5892 {
5893 __be32 *p;
5894 __u32 sizechanged;
5895 int status;
5896
5897 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5898 res->status = status;
5899 if (status)
5900 return status;
5901
5902 p = xdr_inline_decode(xdr, 4);
5903 if (unlikely(!p))
5904 goto out_overflow;
5905 sizechanged = be32_to_cpup(p);
5906
5907 if (sizechanged) {
5908 /* throw away new size */
5909 p = xdr_inline_decode(xdr, 8);
5910 if (unlikely(!p))
5911 goto out_overflow;
5912 }
5913 return 0;
5914 out_overflow:
5915 print_overflow_msg(__func__, xdr);
5916 return -EIO;
5917 }
5918
5919 static int decode_test_stateid(struct xdr_stream *xdr,
5920 struct nfs41_test_stateid_res *res)
5921 {
5922 __be32 *p;
5923 int status;
5924 int num_res;
5925
5926 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5927 if (status)
5928 return status;
5929
5930 p = xdr_inline_decode(xdr, 4);
5931 if (unlikely(!p))
5932 goto out_overflow;
5933 num_res = be32_to_cpup(p++);
5934 if (num_res != 1)
5935 goto out;
5936
5937 p = xdr_inline_decode(xdr, 4);
5938 if (unlikely(!p))
5939 goto out_overflow;
5940 res->status = be32_to_cpup(p++);
5941
5942 return status;
5943 out_overflow:
5944 print_overflow_msg(__func__, xdr);
5945 out:
5946 return -EIO;
5947 }
5948
5949 static int decode_free_stateid(struct xdr_stream *xdr,
5950 struct nfs41_free_stateid_res *res)
5951 {
5952 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5953 return res->status;
5954 }
5955 #endif /* CONFIG_NFS_V4_1 */
5956
5957 /*
5958 * END OF "GENERIC" DECODE ROUTINES.
5959 */
5960
5961 /*
5962 * Decode OPEN_DOWNGRADE response
5963 */
5964 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5965 struct xdr_stream *xdr,
5966 struct nfs_closeres *res)
5967 {
5968 struct compound_hdr hdr;
5969 int status;
5970
5971 status = decode_compound_hdr(xdr, &hdr);
5972 if (status)
5973 goto out;
5974 status = decode_sequence(xdr, &res->seq_res, rqstp);
5975 if (status)
5976 goto out;
5977 status = decode_putfh(xdr);
5978 if (status)
5979 goto out;
5980 status = decode_open_downgrade(xdr, res);
5981 if (status != 0)
5982 goto out;
5983 decode_getfattr(xdr, res->fattr, res->server);
5984 out:
5985 return status;
5986 }
5987
5988 /*
5989 * Decode ACCESS response
5990 */
5991 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5992 struct nfs4_accessres *res)
5993 {
5994 struct compound_hdr hdr;
5995 int status;
5996
5997 status = decode_compound_hdr(xdr, &hdr);
5998 if (status)
5999 goto out;
6000 status = decode_sequence(xdr, &res->seq_res, rqstp);
6001 if (status)
6002 goto out;
6003 status = decode_putfh(xdr);
6004 if (status != 0)
6005 goto out;
6006 status = decode_access(xdr, &res->supported, &res->access);
6007 if (status != 0)
6008 goto out;
6009 decode_getfattr(xdr, res->fattr, res->server);
6010 out:
6011 return status;
6012 }
6013
6014 /*
6015 * Decode LOOKUP response
6016 */
6017 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6018 struct nfs4_lookup_res *res)
6019 {
6020 struct compound_hdr hdr;
6021 int status;
6022
6023 status = decode_compound_hdr(xdr, &hdr);
6024 if (status)
6025 goto out;
6026 status = decode_sequence(xdr, &res->seq_res, rqstp);
6027 if (status)
6028 goto out;
6029 status = decode_putfh(xdr);
6030 if (status)
6031 goto out;
6032 status = decode_lookup(xdr);
6033 if (status)
6034 goto out;
6035 status = decode_getfh(xdr, res->fh);
6036 if (status)
6037 goto out;
6038 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6039 out:
6040 return status;
6041 }
6042
6043 /*
6044 * Decode LOOKUP_ROOT response
6045 */
6046 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6047 struct xdr_stream *xdr,
6048 struct nfs4_lookup_res *res)
6049 {
6050 struct compound_hdr hdr;
6051 int status;
6052
6053 status = decode_compound_hdr(xdr, &hdr);
6054 if (status)
6055 goto out;
6056 status = decode_sequence(xdr, &res->seq_res, rqstp);
6057 if (status)
6058 goto out;
6059 status = decode_putrootfh(xdr);
6060 if (status)
6061 goto out;
6062 status = decode_getfh(xdr, res->fh);
6063 if (status == 0)
6064 status = decode_getfattr_label(xdr, res->fattr,
6065 res->label, res->server);
6066 out:
6067 return status;
6068 }
6069
6070 /*
6071 * Decode REMOVE response
6072 */
6073 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6074 struct nfs_removeres *res)
6075 {
6076 struct compound_hdr hdr;
6077 int status;
6078
6079 status = decode_compound_hdr(xdr, &hdr);
6080 if (status)
6081 goto out;
6082 status = decode_sequence(xdr, &res->seq_res, rqstp);
6083 if (status)
6084 goto out;
6085 status = decode_putfh(xdr);
6086 if (status)
6087 goto out;
6088 status = decode_remove(xdr, &res->cinfo);
6089 out:
6090 return status;
6091 }
6092
6093 /*
6094 * Decode RENAME response
6095 */
6096 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6097 struct nfs_renameres *res)
6098 {
6099 struct compound_hdr hdr;
6100 int status;
6101
6102 status = decode_compound_hdr(xdr, &hdr);
6103 if (status)
6104 goto out;
6105 status = decode_sequence(xdr, &res->seq_res, rqstp);
6106 if (status)
6107 goto out;
6108 status = decode_putfh(xdr);
6109 if (status)
6110 goto out;
6111 status = decode_savefh(xdr);
6112 if (status)
6113 goto out;
6114 status = decode_putfh(xdr);
6115 if (status)
6116 goto out;
6117 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6118 out:
6119 return status;
6120 }
6121
6122 /*
6123 * Decode LINK response
6124 */
6125 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6126 struct nfs4_link_res *res)
6127 {
6128 struct compound_hdr hdr;
6129 int status;
6130
6131 status = decode_compound_hdr(xdr, &hdr);
6132 if (status)
6133 goto out;
6134 status = decode_sequence(xdr, &res->seq_res, rqstp);
6135 if (status)
6136 goto out;
6137 status = decode_putfh(xdr);
6138 if (status)
6139 goto out;
6140 status = decode_savefh(xdr);
6141 if (status)
6142 goto out;
6143 status = decode_putfh(xdr);
6144 if (status)
6145 goto out;
6146 status = decode_link(xdr, &res->cinfo);
6147 if (status)
6148 goto out;
6149 /*
6150 * Note order: OP_LINK leaves the directory as the current
6151 * filehandle.
6152 */
6153 status = decode_restorefh(xdr);
6154 if (status)
6155 goto out;
6156 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6157 out:
6158 return status;
6159 }
6160
6161 /*
6162 * Decode CREATE response
6163 */
6164 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6165 struct nfs4_create_res *res)
6166 {
6167 struct compound_hdr hdr;
6168 int status;
6169
6170 status = decode_compound_hdr(xdr, &hdr);
6171 if (status)
6172 goto out;
6173 status = decode_sequence(xdr, &res->seq_res, rqstp);
6174 if (status)
6175 goto out;
6176 status = decode_putfh(xdr);
6177 if (status)
6178 goto out;
6179 status = decode_create(xdr, &res->dir_cinfo);
6180 if (status)
6181 goto out;
6182 status = decode_getfh(xdr, res->fh);
6183 if (status)
6184 goto out;
6185 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6186 out:
6187 return status;
6188 }
6189
6190 /*
6191 * Decode SYMLINK response
6192 */
6193 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6194 struct nfs4_create_res *res)
6195 {
6196 return nfs4_xdr_dec_create(rqstp, xdr, res);
6197 }
6198
6199 /*
6200 * Decode GETATTR response
6201 */
6202 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 struct nfs4_getattr_res *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_getfattr_label(xdr, res->fattr, res->label, res->server);
6218 out:
6219 return status;
6220 }
6221
6222 /*
6223 * Encode an SETACL request
6224 */
6225 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6226 struct nfs_setaclargs *args)
6227 {
6228 struct compound_hdr hdr = {
6229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6230 };
6231
6232 encode_compound_hdr(xdr, req, &hdr);
6233 encode_sequence(xdr, &args->seq_args, &hdr);
6234 encode_putfh(xdr, args->fh, &hdr);
6235 encode_setacl(xdr, args, &hdr);
6236 encode_nops(&hdr);
6237 }
6238
6239 /*
6240 * Decode SETACL response
6241 */
6242 static int
6243 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6244 struct nfs_setaclres *res)
6245 {
6246 struct compound_hdr hdr;
6247 int status;
6248
6249 status = decode_compound_hdr(xdr, &hdr);
6250 if (status)
6251 goto out;
6252 status = decode_sequence(xdr, &res->seq_res, rqstp);
6253 if (status)
6254 goto out;
6255 status = decode_putfh(xdr);
6256 if (status)
6257 goto out;
6258 status = decode_setattr(xdr);
6259 out:
6260 return status;
6261 }
6262
6263 /*
6264 * Decode GETACL response
6265 */
6266 static int
6267 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268 struct nfs_getaclres *res)
6269 {
6270 struct compound_hdr hdr;
6271 int status;
6272
6273 if (res->acl_scratch != NULL) {
6274 void *p = page_address(res->acl_scratch);
6275 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6276 }
6277 status = decode_compound_hdr(xdr, &hdr);
6278 if (status)
6279 goto out;
6280 status = decode_sequence(xdr, &res->seq_res, rqstp);
6281 if (status)
6282 goto out;
6283 status = decode_putfh(xdr);
6284 if (status)
6285 goto out;
6286 status = decode_getacl(xdr, rqstp, res);
6287
6288 out:
6289 return status;
6290 }
6291
6292 /*
6293 * Decode CLOSE response
6294 */
6295 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6296 struct nfs_closeres *res)
6297 {
6298 struct compound_hdr hdr;
6299 int status;
6300
6301 status = decode_compound_hdr(xdr, &hdr);
6302 if (status)
6303 goto out;
6304 status = decode_sequence(xdr, &res->seq_res, rqstp);
6305 if (status)
6306 goto out;
6307 status = decode_putfh(xdr);
6308 if (status)
6309 goto out;
6310 status = decode_close(xdr, res);
6311 if (status != 0)
6312 goto out;
6313 /*
6314 * Note: Server may do delete on close for this file
6315 * in which case the getattr call will fail with
6316 * an ESTALE error. Shouldn't be a problem,
6317 * though, since fattr->valid will remain unset.
6318 */
6319 decode_getfattr(xdr, res->fattr, res->server);
6320 out:
6321 return status;
6322 }
6323
6324 /*
6325 * Decode OPEN response
6326 */
6327 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6328 struct nfs_openres *res)
6329 {
6330 struct compound_hdr hdr;
6331 int status;
6332
6333 status = decode_compound_hdr(xdr, &hdr);
6334 if (status)
6335 goto out;
6336 status = decode_sequence(xdr, &res->seq_res, rqstp);
6337 if (status)
6338 goto out;
6339 status = decode_putfh(xdr);
6340 if (status)
6341 goto out;
6342 status = decode_open(xdr, res);
6343 if (status)
6344 goto out;
6345 status = decode_getfh(xdr, &res->fh);
6346 if (status)
6347 goto out;
6348 if (res->access_request)
6349 decode_access(xdr, &res->access_supported, &res->access_result);
6350 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6351 out:
6352 return status;
6353 }
6354
6355 /*
6356 * Decode OPEN_CONFIRM response
6357 */
6358 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6359 struct xdr_stream *xdr,
6360 struct nfs_open_confirmres *res)
6361 {
6362 struct compound_hdr hdr;
6363 int status;
6364
6365 status = decode_compound_hdr(xdr, &hdr);
6366 if (status)
6367 goto out;
6368 status = decode_putfh(xdr);
6369 if (status)
6370 goto out;
6371 status = decode_open_confirm(xdr, res);
6372 out:
6373 return status;
6374 }
6375
6376 /*
6377 * Decode OPEN response
6378 */
6379 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6380 struct xdr_stream *xdr,
6381 struct nfs_openres *res)
6382 {
6383 struct compound_hdr hdr;
6384 int status;
6385
6386 status = decode_compound_hdr(xdr, &hdr);
6387 if (status)
6388 goto out;
6389 status = decode_sequence(xdr, &res->seq_res, rqstp);
6390 if (status)
6391 goto out;
6392 status = decode_putfh(xdr);
6393 if (status)
6394 goto out;
6395 status = decode_open(xdr, res);
6396 if (status)
6397 goto out;
6398 if (res->access_request)
6399 decode_access(xdr, &res->access_supported, &res->access_result);
6400 decode_getfattr(xdr, res->f_attr, res->server);
6401 out:
6402 return status;
6403 }
6404
6405 /*
6406 * Decode SETATTR response
6407 */
6408 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6409 struct xdr_stream *xdr,
6410 struct nfs_setattrres *res)
6411 {
6412 struct compound_hdr hdr;
6413 int status;
6414
6415 status = decode_compound_hdr(xdr, &hdr);
6416 if (status)
6417 goto out;
6418 status = decode_sequence(xdr, &res->seq_res, rqstp);
6419 if (status)
6420 goto out;
6421 status = decode_putfh(xdr);
6422 if (status)
6423 goto out;
6424 status = decode_setattr(xdr);
6425 if (status)
6426 goto out;
6427 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6428 out:
6429 return status;
6430 }
6431
6432 /*
6433 * Decode LOCK response
6434 */
6435 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6436 struct nfs_lock_res *res)
6437 {
6438 struct compound_hdr hdr;
6439 int status;
6440
6441 status = decode_compound_hdr(xdr, &hdr);
6442 if (status)
6443 goto out;
6444 status = decode_sequence(xdr, &res->seq_res, rqstp);
6445 if (status)
6446 goto out;
6447 status = decode_putfh(xdr);
6448 if (status)
6449 goto out;
6450 status = decode_lock(xdr, res);
6451 out:
6452 return status;
6453 }
6454
6455 /*
6456 * Decode LOCKT response
6457 */
6458 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6459 struct nfs_lockt_res *res)
6460 {
6461 struct compound_hdr hdr;
6462 int status;
6463
6464 status = decode_compound_hdr(xdr, &hdr);
6465 if (status)
6466 goto out;
6467 status = decode_sequence(xdr, &res->seq_res, rqstp);
6468 if (status)
6469 goto out;
6470 status = decode_putfh(xdr);
6471 if (status)
6472 goto out;
6473 status = decode_lockt(xdr, res);
6474 out:
6475 return status;
6476 }
6477
6478 /*
6479 * Decode LOCKU response
6480 */
6481 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6482 struct nfs_locku_res *res)
6483 {
6484 struct compound_hdr hdr;
6485 int status;
6486
6487 status = decode_compound_hdr(xdr, &hdr);
6488 if (status)
6489 goto out;
6490 status = decode_sequence(xdr, &res->seq_res, rqstp);
6491 if (status)
6492 goto out;
6493 status = decode_putfh(xdr);
6494 if (status)
6495 goto out;
6496 status = decode_locku(xdr, res);
6497 out:
6498 return status;
6499 }
6500
6501 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6502 struct xdr_stream *xdr, void *dummy)
6503 {
6504 struct compound_hdr hdr;
6505 int status;
6506
6507 status = decode_compound_hdr(xdr, &hdr);
6508 if (!status)
6509 status = decode_release_lockowner(xdr);
6510 return status;
6511 }
6512
6513 /*
6514 * Decode READLINK response
6515 */
6516 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6517 struct xdr_stream *xdr,
6518 struct nfs4_readlink_res *res)
6519 {
6520 struct compound_hdr hdr;
6521 int status;
6522
6523 status = decode_compound_hdr(xdr, &hdr);
6524 if (status)
6525 goto out;
6526 status = decode_sequence(xdr, &res->seq_res, rqstp);
6527 if (status)
6528 goto out;
6529 status = decode_putfh(xdr);
6530 if (status)
6531 goto out;
6532 status = decode_readlink(xdr, rqstp);
6533 out:
6534 return status;
6535 }
6536
6537 /*
6538 * Decode READDIR response
6539 */
6540 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6541 struct nfs4_readdir_res *res)
6542 {
6543 struct compound_hdr hdr;
6544 int status;
6545
6546 status = decode_compound_hdr(xdr, &hdr);
6547 if (status)
6548 goto out;
6549 status = decode_sequence(xdr, &res->seq_res, rqstp);
6550 if (status)
6551 goto out;
6552 status = decode_putfh(xdr);
6553 if (status)
6554 goto out;
6555 status = decode_readdir(xdr, rqstp, res);
6556 out:
6557 return status;
6558 }
6559
6560 /*
6561 * Decode Read response
6562 */
6563 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6564 struct nfs_pgio_res *res)
6565 {
6566 struct compound_hdr hdr;
6567 int status;
6568
6569 status = decode_compound_hdr(xdr, &hdr);
6570 if (status)
6571 goto out;
6572 status = decode_sequence(xdr, &res->seq_res, rqstp);
6573 if (status)
6574 goto out;
6575 status = decode_putfh(xdr);
6576 if (status)
6577 goto out;
6578 status = decode_read(xdr, rqstp, res);
6579 if (!status)
6580 status = res->count;
6581 out:
6582 return status;
6583 }
6584
6585 /*
6586 * Decode WRITE response
6587 */
6588 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6589 struct nfs_pgio_res *res)
6590 {
6591 struct compound_hdr hdr;
6592 int status;
6593
6594 status = decode_compound_hdr(xdr, &hdr);
6595 if (status)
6596 goto out;
6597 status = decode_sequence(xdr, &res->seq_res, rqstp);
6598 if (status)
6599 goto out;
6600 status = decode_putfh(xdr);
6601 if (status)
6602 goto out;
6603 status = decode_write(xdr, res);
6604 if (status)
6605 goto out;
6606 if (res->fattr)
6607 decode_getfattr(xdr, res->fattr, res->server);
6608 if (!status)
6609 status = res->count;
6610 out:
6611 return status;
6612 }
6613
6614 /*
6615 * Decode COMMIT response
6616 */
6617 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6618 struct nfs_commitres *res)
6619 {
6620 struct compound_hdr hdr;
6621 int status;
6622
6623 status = decode_compound_hdr(xdr, &hdr);
6624 if (status)
6625 goto out;
6626 status = decode_sequence(xdr, &res->seq_res, rqstp);
6627 if (status)
6628 goto out;
6629 status = decode_putfh(xdr);
6630 if (status)
6631 goto out;
6632 status = decode_commit(xdr, res);
6633 out:
6634 return status;
6635 }
6636
6637 /*
6638 * Decode FSINFO response
6639 */
6640 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6641 struct nfs4_fsinfo_res *res)
6642 {
6643 struct compound_hdr hdr;
6644 int status;
6645
6646 status = decode_compound_hdr(xdr, &hdr);
6647 if (!status)
6648 status = decode_sequence(xdr, &res->seq_res, req);
6649 if (!status)
6650 status = decode_putfh(xdr);
6651 if (!status)
6652 status = decode_fsinfo(xdr, res->fsinfo);
6653 return status;
6654 }
6655
6656 /*
6657 * Decode PATHCONF response
6658 */
6659 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6660 struct nfs4_pathconf_res *res)
6661 {
6662 struct compound_hdr hdr;
6663 int status;
6664
6665 status = decode_compound_hdr(xdr, &hdr);
6666 if (!status)
6667 status = decode_sequence(xdr, &res->seq_res, req);
6668 if (!status)
6669 status = decode_putfh(xdr);
6670 if (!status)
6671 status = decode_pathconf(xdr, res->pathconf);
6672 return status;
6673 }
6674
6675 /*
6676 * Decode STATFS response
6677 */
6678 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6679 struct nfs4_statfs_res *res)
6680 {
6681 struct compound_hdr hdr;
6682 int status;
6683
6684 status = decode_compound_hdr(xdr, &hdr);
6685 if (!status)
6686 status = decode_sequence(xdr, &res->seq_res, req);
6687 if (!status)
6688 status = decode_putfh(xdr);
6689 if (!status)
6690 status = decode_statfs(xdr, res->fsstat);
6691 return status;
6692 }
6693
6694 /*
6695 * Decode GETATTR_BITMAP response
6696 */
6697 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6698 struct xdr_stream *xdr,
6699 struct nfs4_server_caps_res *res)
6700 {
6701 struct compound_hdr hdr;
6702 int status;
6703
6704 status = decode_compound_hdr(xdr, &hdr);
6705 if (status)
6706 goto out;
6707 status = decode_sequence(xdr, &res->seq_res, req);
6708 if (status)
6709 goto out;
6710 status = decode_putfh(xdr);
6711 if (status)
6712 goto out;
6713 status = decode_server_caps(xdr, res);
6714 out:
6715 return status;
6716 }
6717
6718 /*
6719 * Decode RENEW response
6720 */
6721 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6722 void *__unused)
6723 {
6724 struct compound_hdr hdr;
6725 int status;
6726
6727 status = decode_compound_hdr(xdr, &hdr);
6728 if (!status)
6729 status = decode_renew(xdr);
6730 return status;
6731 }
6732
6733 /*
6734 * Decode SETCLIENTID response
6735 */
6736 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6737 struct xdr_stream *xdr,
6738 struct nfs4_setclientid_res *res)
6739 {
6740 struct compound_hdr hdr;
6741 int status;
6742
6743 status = decode_compound_hdr(xdr, &hdr);
6744 if (!status)
6745 status = decode_setclientid(xdr, res);
6746 return status;
6747 }
6748
6749 /*
6750 * Decode SETCLIENTID_CONFIRM response
6751 */
6752 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6753 struct xdr_stream *xdr)
6754 {
6755 struct compound_hdr hdr;
6756 int status;
6757
6758 status = decode_compound_hdr(xdr, &hdr);
6759 if (!status)
6760 status = decode_setclientid_confirm(xdr);
6761 return status;
6762 }
6763
6764 /*
6765 * Decode DELEGRETURN response
6766 */
6767 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6768 struct xdr_stream *xdr,
6769 struct nfs4_delegreturnres *res)
6770 {
6771 struct compound_hdr hdr;
6772 int status;
6773
6774 status = decode_compound_hdr(xdr, &hdr);
6775 if (status)
6776 goto out;
6777 status = decode_sequence(xdr, &res->seq_res, rqstp);
6778 if (status)
6779 goto out;
6780 status = decode_putfh(xdr);
6781 if (status != 0)
6782 goto out;
6783 status = decode_getfattr(xdr, res->fattr, res->server);
6784 if (status != 0)
6785 goto out;
6786 status = decode_delegreturn(xdr);
6787 out:
6788 return status;
6789 }
6790
6791 /*
6792 * Decode FS_LOCATIONS response
6793 */
6794 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6795 struct xdr_stream *xdr,
6796 struct nfs4_fs_locations_res *res)
6797 {
6798 struct compound_hdr hdr;
6799 int status;
6800
6801 status = decode_compound_hdr(xdr, &hdr);
6802 if (status)
6803 goto out;
6804 status = decode_sequence(xdr, &res->seq_res, req);
6805 if (status)
6806 goto out;
6807 status = decode_putfh(xdr);
6808 if (status)
6809 goto out;
6810 if (res->migration) {
6811 xdr_enter_page(xdr, PAGE_SIZE);
6812 status = decode_getfattr_generic(xdr,
6813 &res->fs_locations->fattr,
6814 NULL, res->fs_locations,
6815 NULL, res->fs_locations->server);
6816 if (status)
6817 goto out;
6818 if (res->renew)
6819 status = decode_renew(xdr);
6820 } else {
6821 status = decode_lookup(xdr);
6822 if (status)
6823 goto out;
6824 xdr_enter_page(xdr, PAGE_SIZE);
6825 status = decode_getfattr_generic(xdr,
6826 &res->fs_locations->fattr,
6827 NULL, res->fs_locations,
6828 NULL, res->fs_locations->server);
6829 }
6830 out:
6831 return status;
6832 }
6833
6834 /*
6835 * Decode SECINFO response
6836 */
6837 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6838 struct xdr_stream *xdr,
6839 struct nfs4_secinfo_res *res)
6840 {
6841 struct compound_hdr hdr;
6842 int status;
6843
6844 status = decode_compound_hdr(xdr, &hdr);
6845 if (status)
6846 goto out;
6847 status = decode_sequence(xdr, &res->seq_res, rqstp);
6848 if (status)
6849 goto out;
6850 status = decode_putfh(xdr);
6851 if (status)
6852 goto out;
6853 status = decode_secinfo(xdr, res);
6854 out:
6855 return status;
6856 }
6857
6858 /*
6859 * Decode FSID_PRESENT response
6860 */
6861 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6862 struct xdr_stream *xdr,
6863 struct nfs4_fsid_present_res *res)
6864 {
6865 struct compound_hdr hdr;
6866 int status;
6867
6868 status = decode_compound_hdr(xdr, &hdr);
6869 if (status)
6870 goto out;
6871 status = decode_sequence(xdr, &res->seq_res, rqstp);
6872 if (status)
6873 goto out;
6874 status = decode_putfh(xdr);
6875 if (status)
6876 goto out;
6877 status = decode_getfh(xdr, res->fh);
6878 if (status)
6879 goto out;
6880 if (res->renew)
6881 status = decode_renew(xdr);
6882 out:
6883 return status;
6884 }
6885
6886 #if defined(CONFIG_NFS_V4_1)
6887 /*
6888 * Decode BIND_CONN_TO_SESSION response
6889 */
6890 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6891 struct xdr_stream *xdr,
6892 void *res)
6893 {
6894 struct compound_hdr hdr;
6895 int status;
6896
6897 status = decode_compound_hdr(xdr, &hdr);
6898 if (!status)
6899 status = decode_bind_conn_to_session(xdr, res);
6900 return status;
6901 }
6902
6903 /*
6904 * Decode EXCHANGE_ID response
6905 */
6906 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6907 struct xdr_stream *xdr,
6908 void *res)
6909 {
6910 struct compound_hdr hdr;
6911 int status;
6912
6913 status = decode_compound_hdr(xdr, &hdr);
6914 if (!status)
6915 status = decode_exchange_id(xdr, res);
6916 return status;
6917 }
6918
6919 /*
6920 * Decode CREATE_SESSION response
6921 */
6922 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6923 struct xdr_stream *xdr,
6924 struct nfs41_create_session_res *res)
6925 {
6926 struct compound_hdr hdr;
6927 int status;
6928
6929 status = decode_compound_hdr(xdr, &hdr);
6930 if (!status)
6931 status = decode_create_session(xdr, res);
6932 return status;
6933 }
6934
6935 /*
6936 * Decode DESTROY_SESSION response
6937 */
6938 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6939 struct xdr_stream *xdr,
6940 void *res)
6941 {
6942 struct compound_hdr hdr;
6943 int status;
6944
6945 status = decode_compound_hdr(xdr, &hdr);
6946 if (!status)
6947 status = decode_destroy_session(xdr, res);
6948 return status;
6949 }
6950
6951 /*
6952 * Decode DESTROY_CLIENTID response
6953 */
6954 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6955 struct xdr_stream *xdr,
6956 void *res)
6957 {
6958 struct compound_hdr hdr;
6959 int status;
6960
6961 status = decode_compound_hdr(xdr, &hdr);
6962 if (!status)
6963 status = decode_destroy_clientid(xdr, res);
6964 return status;
6965 }
6966
6967 /*
6968 * Decode SEQUENCE response
6969 */
6970 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6971 struct xdr_stream *xdr,
6972 struct nfs4_sequence_res *res)
6973 {
6974 struct compound_hdr hdr;
6975 int status;
6976
6977 status = decode_compound_hdr(xdr, &hdr);
6978 if (!status)
6979 status = decode_sequence(xdr, res, rqstp);
6980 return status;
6981 }
6982
6983 /*
6984 * Decode GET_LEASE_TIME response
6985 */
6986 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6987 struct xdr_stream *xdr,
6988 struct nfs4_get_lease_time_res *res)
6989 {
6990 struct compound_hdr hdr;
6991 int status;
6992
6993 status = decode_compound_hdr(xdr, &hdr);
6994 if (!status)
6995 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6996 if (!status)
6997 status = decode_putrootfh(xdr);
6998 if (!status)
6999 status = decode_fsinfo(xdr, res->lr_fsinfo);
7000 return status;
7001 }
7002
7003 /*
7004 * Decode RECLAIM_COMPLETE response
7005 */
7006 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7007 struct xdr_stream *xdr,
7008 struct nfs41_reclaim_complete_res *res)
7009 {
7010 struct compound_hdr hdr;
7011 int status;
7012
7013 status = decode_compound_hdr(xdr, &hdr);
7014 if (!status)
7015 status = decode_sequence(xdr, &res->seq_res, rqstp);
7016 if (!status)
7017 status = decode_reclaim_complete(xdr, NULL);
7018 return status;
7019 }
7020
7021 /*
7022 * Decode GETDEVINFO response
7023 */
7024 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7025 struct xdr_stream *xdr,
7026 struct nfs4_getdeviceinfo_res *res)
7027 {
7028 struct compound_hdr hdr;
7029 int status;
7030
7031 status = decode_compound_hdr(xdr, &hdr);
7032 if (status != 0)
7033 goto out;
7034 status = decode_sequence(xdr, &res->seq_res, rqstp);
7035 if (status != 0)
7036 goto out;
7037 status = decode_getdeviceinfo(xdr, res->pdev);
7038 out:
7039 return status;
7040 }
7041
7042 /*
7043 * Decode LAYOUTGET response
7044 */
7045 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7046 struct xdr_stream *xdr,
7047 struct nfs4_layoutget_res *res)
7048 {
7049 struct compound_hdr hdr;
7050 int status;
7051
7052 status = decode_compound_hdr(xdr, &hdr);
7053 if (status)
7054 goto out;
7055 status = decode_sequence(xdr, &res->seq_res, rqstp);
7056 if (status)
7057 goto out;
7058 status = decode_putfh(xdr);
7059 if (status)
7060 goto out;
7061 status = decode_layoutget(xdr, rqstp, res);
7062 out:
7063 return status;
7064 }
7065
7066 /*
7067 * Decode LAYOUTRETURN response
7068 */
7069 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7070 struct xdr_stream *xdr,
7071 struct nfs4_layoutreturn_res *res)
7072 {
7073 struct compound_hdr hdr;
7074 int status;
7075
7076 status = decode_compound_hdr(xdr, &hdr);
7077 if (status)
7078 goto out;
7079 status = decode_sequence(xdr, &res->seq_res, rqstp);
7080 if (status)
7081 goto out;
7082 status = decode_putfh(xdr);
7083 if (status)
7084 goto out;
7085 status = decode_layoutreturn(xdr, res);
7086 out:
7087 return status;
7088 }
7089
7090 /*
7091 * Decode LAYOUTCOMMIT response
7092 */
7093 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7094 struct xdr_stream *xdr,
7095 struct nfs4_layoutcommit_res *res)
7096 {
7097 struct compound_hdr hdr;
7098 int status;
7099
7100 status = decode_compound_hdr(xdr, &hdr);
7101 if (status)
7102 goto out;
7103 status = decode_sequence(xdr, &res->seq_res, rqstp);
7104 if (status)
7105 goto out;
7106 status = decode_putfh(xdr);
7107 if (status)
7108 goto out;
7109 status = decode_layoutcommit(xdr, rqstp, res);
7110 if (status)
7111 goto out;
7112 decode_getfattr(xdr, res->fattr, res->server);
7113 out:
7114 return status;
7115 }
7116
7117 /*
7118 * Decode SECINFO_NO_NAME response
7119 */
7120 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7121 struct xdr_stream *xdr,
7122 struct nfs4_secinfo_res *res)
7123 {
7124 struct compound_hdr hdr;
7125 int status;
7126
7127 status = decode_compound_hdr(xdr, &hdr);
7128 if (status)
7129 goto out;
7130 status = decode_sequence(xdr, &res->seq_res, rqstp);
7131 if (status)
7132 goto out;
7133 status = decode_putrootfh(xdr);
7134 if (status)
7135 goto out;
7136 status = decode_secinfo_no_name(xdr, res);
7137 out:
7138 return status;
7139 }
7140
7141 /*
7142 * Decode TEST_STATEID response
7143 */
7144 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7145 struct xdr_stream *xdr,
7146 struct nfs41_test_stateid_res *res)
7147 {
7148 struct compound_hdr hdr;
7149 int status;
7150
7151 status = decode_compound_hdr(xdr, &hdr);
7152 if (status)
7153 goto out;
7154 status = decode_sequence(xdr, &res->seq_res, rqstp);
7155 if (status)
7156 goto out;
7157 status = decode_test_stateid(xdr, res);
7158 out:
7159 return status;
7160 }
7161
7162 /*
7163 * Decode FREE_STATEID response
7164 */
7165 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7166 struct xdr_stream *xdr,
7167 struct nfs41_free_stateid_res *res)
7168 {
7169 struct compound_hdr hdr;
7170 int status;
7171
7172 status = decode_compound_hdr(xdr, &hdr);
7173 if (status)
7174 goto out;
7175 status = decode_sequence(xdr, &res->seq_res, rqstp);
7176 if (status)
7177 goto out;
7178 status = decode_free_stateid(xdr, res);
7179 out:
7180 return status;
7181 }
7182 #endif /* CONFIG_NFS_V4_1 */
7183
7184 /**
7185 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7186 * the local page cache.
7187 * @xdr: XDR stream where entry resides
7188 * @entry: buffer to fill in with entry data
7189 * @plus: boolean indicating whether this should be a readdirplus entry
7190 *
7191 * Returns zero if successful, otherwise a negative errno value is
7192 * returned.
7193 *
7194 * This function is not invoked during READDIR reply decoding, but
7195 * rather whenever an application invokes the getdents(2) system call
7196 * on a directory already in our cache.
7197 */
7198 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7199 int plus)
7200 {
7201 unsigned int savep;
7202 uint32_t bitmap[3] = {0};
7203 uint32_t len;
7204 __be32 *p = xdr_inline_decode(xdr, 4);
7205 if (unlikely(!p))
7206 goto out_overflow;
7207 if (*p == xdr_zero) {
7208 p = xdr_inline_decode(xdr, 4);
7209 if (unlikely(!p))
7210 goto out_overflow;
7211 if (*p == xdr_zero)
7212 return -EAGAIN;
7213 entry->eof = 1;
7214 return -EBADCOOKIE;
7215 }
7216
7217 p = xdr_inline_decode(xdr, 12);
7218 if (unlikely(!p))
7219 goto out_overflow;
7220 entry->prev_cookie = entry->cookie;
7221 p = xdr_decode_hyper(p, &entry->cookie);
7222 entry->len = be32_to_cpup(p);
7223
7224 p = xdr_inline_decode(xdr, entry->len);
7225 if (unlikely(!p))
7226 goto out_overflow;
7227 entry->name = (const char *) p;
7228
7229 /*
7230 * In case the server doesn't return an inode number,
7231 * we fake one here. (We don't use inode number 0,
7232 * since glibc seems to choke on it...)
7233 */
7234 entry->ino = 1;
7235 entry->fattr->valid = 0;
7236
7237 if (decode_attr_bitmap(xdr, bitmap) < 0)
7238 goto out_overflow;
7239
7240 if (decode_attr_length(xdr, &len, &savep) < 0)
7241 goto out_overflow;
7242
7243 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7244 NULL, entry->label, entry->server) < 0)
7245 goto out_overflow;
7246 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7247 entry->ino = entry->fattr->mounted_on_fileid;
7248 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7249 entry->ino = entry->fattr->fileid;
7250
7251 entry->d_type = DT_UNKNOWN;
7252 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7253 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7254
7255 return 0;
7256
7257 out_overflow:
7258 print_overflow_msg(__func__, xdr);
7259 return -EAGAIN;
7260 }
7261
7262 /*
7263 * We need to translate between nfs status return values and
7264 * the local errno values which may not be the same.
7265 */
7266 static struct {
7267 int stat;
7268 int errno;
7269 } nfs_errtbl[] = {
7270 { NFS4_OK, 0 },
7271 { NFS4ERR_PERM, -EPERM },
7272 { NFS4ERR_NOENT, -ENOENT },
7273 { NFS4ERR_IO, -errno_NFSERR_IO},
7274 { NFS4ERR_NXIO, -ENXIO },
7275 { NFS4ERR_ACCESS, -EACCES },
7276 { NFS4ERR_EXIST, -EEXIST },
7277 { NFS4ERR_XDEV, -EXDEV },
7278 { NFS4ERR_NOTDIR, -ENOTDIR },
7279 { NFS4ERR_ISDIR, -EISDIR },
7280 { NFS4ERR_INVAL, -EINVAL },
7281 { NFS4ERR_FBIG, -EFBIG },
7282 { NFS4ERR_NOSPC, -ENOSPC },
7283 { NFS4ERR_ROFS, -EROFS },
7284 { NFS4ERR_MLINK, -EMLINK },
7285 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7286 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7287 { NFS4ERR_DQUOT, -EDQUOT },
7288 { NFS4ERR_STALE, -ESTALE },
7289 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7290 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7291 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7292 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7293 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7294 { NFS4ERR_BADTYPE, -EBADTYPE },
7295 { NFS4ERR_LOCKED, -EAGAIN },
7296 { NFS4ERR_SYMLINK, -ELOOP },
7297 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7298 { NFS4ERR_DEADLOCK, -EDEADLK },
7299 { -1, -EIO }
7300 };
7301
7302 /*
7303 * Convert an NFS error code to a local one.
7304 * This one is used jointly by NFSv2 and NFSv3.
7305 */
7306 static int
7307 nfs4_stat_to_errno(int stat)
7308 {
7309 int i;
7310 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7311 if (nfs_errtbl[i].stat == stat)
7312 return nfs_errtbl[i].errno;
7313 }
7314 if (stat <= 10000 || stat > 10100) {
7315 /* The server is looney tunes. */
7316 return -EREMOTEIO;
7317 }
7318 /* If we cannot translate the error, the recovery routines should
7319 * handle it.
7320 * Note: remaining NFSv4 error codes have values > 10000, so should
7321 * not conflict with native Linux error codes.
7322 */
7323 return -stat;
7324 }
7325
7326 #ifdef CONFIG_NFS_V4_2
7327 #include "nfs42xdr.c"
7328 #endif /* CONFIG_NFS_V4_2 */
7329
7330 #define PROC(proc, argtype, restype) \
7331 [NFSPROC4_CLNT_##proc] = { \
7332 .p_proc = NFSPROC4_COMPOUND, \
7333 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7334 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7335 .p_arglen = NFS4_##argtype##_sz, \
7336 .p_replen = NFS4_##restype##_sz, \
7337 .p_statidx = NFSPROC4_CLNT_##proc, \
7338 .p_name = #proc, \
7339 }
7340
7341 struct rpc_procinfo nfs4_procedures[] = {
7342 PROC(READ, enc_read, dec_read),
7343 PROC(WRITE, enc_write, dec_write),
7344 PROC(COMMIT, enc_commit, dec_commit),
7345 PROC(OPEN, enc_open, dec_open),
7346 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7347 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7348 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7349 PROC(CLOSE, enc_close, dec_close),
7350 PROC(SETATTR, enc_setattr, dec_setattr),
7351 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7352 PROC(RENEW, enc_renew, dec_renew),
7353 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7354 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7355 PROC(LOCK, enc_lock, dec_lock),
7356 PROC(LOCKT, enc_lockt, dec_lockt),
7357 PROC(LOCKU, enc_locku, dec_locku),
7358 PROC(ACCESS, enc_access, dec_access),
7359 PROC(GETATTR, enc_getattr, dec_getattr),
7360 PROC(LOOKUP, enc_lookup, dec_lookup),
7361 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7362 PROC(REMOVE, enc_remove, dec_remove),
7363 PROC(RENAME, enc_rename, dec_rename),
7364 PROC(LINK, enc_link, dec_link),
7365 PROC(SYMLINK, enc_symlink, dec_symlink),
7366 PROC(CREATE, enc_create, dec_create),
7367 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7368 PROC(STATFS, enc_statfs, dec_statfs),
7369 PROC(READLINK, enc_readlink, dec_readlink),
7370 PROC(READDIR, enc_readdir, dec_readdir),
7371 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7372 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7373 PROC(GETACL, enc_getacl, dec_getacl),
7374 PROC(SETACL, enc_setacl, dec_setacl),
7375 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7376 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7377 PROC(SECINFO, enc_secinfo, dec_secinfo),
7378 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7379 #if defined(CONFIG_NFS_V4_1)
7380 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7381 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7382 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7383 PROC(SEQUENCE, enc_sequence, dec_sequence),
7384 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7385 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7386 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7387 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7388 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7389 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7390 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7391 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7392 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7393 PROC(BIND_CONN_TO_SESSION,
7394 enc_bind_conn_to_session, dec_bind_conn_to_session),
7395 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7396 #endif /* CONFIG_NFS_V4_1 */
7397 #ifdef CONFIG_NFS_V4_2
7398 PROC(SEEK, enc_seek, dec_seek),
7399 PROC(ALLOCATE, enc_allocate, dec_allocate),
7400 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7401 #endif /* CONFIG_NFS_V4_2 */
7402 };
7403
7404 const struct rpc_version nfs_version4 = {
7405 .number = 4,
7406 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7407 .procs = nfs4_procedures
7408 };
7409
7410 /*
7411 * Local variables:
7412 * c-basic-offset: 8
7413 * End:
7414 */
Linux kernel - Deliverables
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