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Merge tag 'arc-v3.11-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-zesty-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/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 #define encode_readdir_space 24
109 #define encode_readdir_bitmask_sz 3
110 #else
111 #define nfs4_label_maxsz 0
112 #define encode_readdir_space 20
113 #define encode_readdir_bitmask_sz 2
114 #endif
115 /* We support only one layout type per file system */
116 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
117 /* This is based on getfattr, which uses the most attributes: */
118 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
119 3 + 3 + 3 + nfs4_owner_maxsz + \
120 nfs4_group_maxsz + nfs4_label_maxsz + \
121 decode_mdsthreshold_maxsz))
122 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
123 nfs4_fattr_value_maxsz)
124 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
125 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
126 1 + 2 + 1 + \
127 nfs4_owner_maxsz + \
128 nfs4_group_maxsz + \
129 nfs4_label_maxsz + \
130 4 + 4)
131 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
132 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
133 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
134 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
135 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
136 /* The 5 accounts for the PNFS attributes, and assumes that at most three
137 * layout types will be returned.
138 */
139 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
140 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
141 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
142 #define decode_renew_maxsz (op_decode_hdr_maxsz)
143 #define encode_setclientid_maxsz \
144 (op_encode_hdr_maxsz + \
145 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
146 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
147 1 /* sc_prog */ + \
148 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
149 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
150 1) /* sc_cb_ident */
151 #define decode_setclientid_maxsz \
152 (op_decode_hdr_maxsz + \
153 2 + \
154 1024) /* large value for CLID_INUSE */
155 #define encode_setclientid_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 3 + (NFS4_VERIFIER_SIZE >> 2))
158 #define decode_setclientid_confirm_maxsz \
159 (op_decode_hdr_maxsz)
160 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
161 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
162 #define encode_share_access_maxsz \
163 (2)
164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
165 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
167 #define encode_open_maxsz (op_encode_hdr_maxsz + \
168 2 + encode_share_access_maxsz + 2 + \
169 open_owner_id_maxsz + \
170 encode_opentype_maxsz + \
171 encode_claim_null_maxsz)
172 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
174 decode_ace_maxsz)
175 #define decode_change_info_maxsz (5)
176 #define decode_open_maxsz (op_decode_hdr_maxsz + \
177 decode_stateid_maxsz + \
178 decode_change_info_maxsz + 1 + \
179 nfs4_fattr_bitmap_maxsz + \
180 decode_delegation_maxsz)
181 #define encode_open_confirm_maxsz \
182 (op_encode_hdr_maxsz + \
183 encode_stateid_maxsz + 1)
184 #define decode_open_confirm_maxsz \
185 (op_decode_hdr_maxsz + \
186 decode_stateid_maxsz)
187 #define encode_open_downgrade_maxsz \
188 (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 1 + \
190 encode_share_access_maxsz)
191 #define decode_open_downgrade_maxsz \
192 (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_close_maxsz (op_encode_hdr_maxsz + \
195 1 + encode_stateid_maxsz)
196 #define decode_close_maxsz (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
199 encode_stateid_maxsz + \
200 encode_attrs_maxsz)
201 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
202 nfs4_fattr_bitmap_maxsz)
203 #define encode_read_maxsz (op_encode_hdr_maxsz + \
204 encode_stateid_maxsz + 3)
205 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
206 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
207 2 + encode_verifier_maxsz + 5 + \
208 nfs4_label_maxsz)
209 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
210 decode_verifier_maxsz + \
211 nfs4_label_maxsz + nfs4_fattr_maxsz)
212 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
213 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
214 #define encode_write_maxsz (op_encode_hdr_maxsz + \
215 encode_stateid_maxsz + 4)
216 #define decode_write_maxsz (op_decode_hdr_maxsz + \
217 2 + decode_verifier_maxsz)
218 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
219 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
220 decode_verifier_maxsz)
221 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
222 nfs4_name_maxsz)
223 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
224 decode_change_info_maxsz)
225 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
226 2 * nfs4_name_maxsz)
227 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
228 decode_change_info_maxsz + \
229 decode_change_info_maxsz)
230 #define encode_link_maxsz (op_encode_hdr_maxsz + \
231 nfs4_name_maxsz)
232 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
233 #define encode_lockowner_maxsz (7)
234 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
235 7 + \
236 1 + encode_stateid_maxsz + 1 + \
237 encode_lockowner_maxsz)
238 #define decode_lock_denied_maxsz \
239 (8 + decode_lockowner_maxsz)
240 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
241 decode_lock_denied_maxsz)
242 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
243 encode_lockowner_maxsz)
244 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
245 decode_lock_denied_maxsz)
246 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
247 encode_stateid_maxsz + \
248 4)
249 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
250 decode_stateid_maxsz)
251 #define encode_release_lockowner_maxsz \
252 (op_encode_hdr_maxsz + \
253 encode_lockowner_maxsz)
254 #define decode_release_lockowner_maxsz \
255 (op_decode_hdr_maxsz)
256 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
257 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
258 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
259 1 + nfs4_name_maxsz + \
260 1 + \
261 nfs4_fattr_maxsz)
262 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
263 #define encode_create_maxsz (op_encode_hdr_maxsz + \
264 1 + 2 + nfs4_name_maxsz + \
265 encode_attrs_maxsz)
266 #define decode_create_maxsz (op_decode_hdr_maxsz + \
267 decode_change_info_maxsz + \
268 nfs4_fattr_bitmap_maxsz)
269 #define encode_statfs_maxsz (encode_getattr_maxsz)
270 #define decode_statfs_maxsz (decode_getattr_maxsz)
271 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
272 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
273 #define encode_getacl_maxsz (encode_getattr_maxsz)
274 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
275 nfs4_fattr_bitmap_maxsz + 1)
276 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
277 encode_stateid_maxsz + 3)
278 #define decode_setacl_maxsz (decode_setattr_maxsz)
279 #define encode_fs_locations_maxsz \
280 (encode_getattr_maxsz)
281 #define decode_fs_locations_maxsz \
282 (0)
283 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
284 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
285
286 #if defined(CONFIG_NFS_V4_1)
287 #define NFS4_MAX_MACHINE_NAME_LEN (64)
288 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
289 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
290
291 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
292 encode_verifier_maxsz + \
293 1 /* co_ownerid.len */ + \
294 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
295 1 /* flags */ + \
296 1 /* spa_how */ + \
297 0 /* SP4_NONE (for now) */ + \
298 1 /* implementation id array of size 1 */ + \
299 1 /* nii_domain */ + \
300 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
301 1 /* nii_name */ + \
302 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
303 3 /* nii_date */)
304 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
305 2 /* eir_clientid */ + \
306 1 /* eir_sequenceid */ + \
307 1 /* eir_flags */ + \
308 1 /* spr_how */ + \
309 0 /* SP4_NONE (for now) */ + \
310 2 /* eir_server_owner.so_minor_id */ + \
311 /* eir_server_owner.so_major_id<> */ \
312 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
313 /* eir_server_scope<> */ \
314 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
315 1 /* eir_server_impl_id array length */ + \
316 1 /* nii_domain */ + \
317 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
318 1 /* nii_name */ + \
319 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
320 3 /* nii_date */)
321 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
322 #define decode_channel_attrs_maxsz (6 + \
323 1 /* ca_rdma_ird.len */ + \
324 1 /* ca_rdma_ird */)
325 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
326 2 /* csa_clientid */ + \
327 1 /* csa_sequence */ + \
328 1 /* csa_flags */ + \
329 encode_channel_attrs_maxsz + \
330 encode_channel_attrs_maxsz + \
331 1 /* csa_cb_program */ + \
332 1 /* csa_sec_parms.len (1) */ + \
333 1 /* cb_secflavor (AUTH_SYS) */ + \
334 1 /* stamp */ + \
335 1 /* machinename.len */ + \
336 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
337 1 /* uid */ + \
338 1 /* gid */ + \
339 1 /* gids.len (0) */)
340 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
341 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
342 1 /* csr_sequence */ + \
343 1 /* csr_flags */ + \
344 decode_channel_attrs_maxsz + \
345 decode_channel_attrs_maxsz)
346 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
347 /* bctsa_sessid */ \
348 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
349 1 /* bctsa_dir */ + \
350 1 /* bctsa_use_conn_in_rdma_mode */)
351 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
352 /* bctsr_sessid */ \
353 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
354 1 /* bctsr_dir */ + \
355 1 /* bctsr_use_conn_in_rdma_mode */)
356 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
357 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
358 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
359 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
360 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
361 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
362 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
363 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
364 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
365 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
367 encode_verifier_maxsz)
368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
369 2 /* nfs_cookie4 gdlr_cookie */ + \
370 decode_verifier_maxsz \
371 /* verifier4 gdlr_verifier */ + \
372 1 /* gdlr_deviceid_list count */ + \
373 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
374 NFS4_DEVICEID4_SIZE) \
375 /* gdlr_deviceid_list */ + \
376 1 /* bool gdlr_eof */)
377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
378 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
380 1 /* layout type */ + \
381 1 /* opaque devaddr4 length */ + \
382 /* devaddr4 payload is read into page */ \
383 1 /* notification bitmap length */ + \
384 1 /* notification bitmap */)
385 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
386 encode_stateid_maxsz)
387 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
388 decode_stateid_maxsz + \
389 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
391 2 /* offset */ + \
392 2 /* length */ + \
393 1 /* reclaim */ + \
394 encode_stateid_maxsz + \
395 1 /* new offset (true) */ + \
396 2 /* last byte written */ + \
397 1 /* nt_timechanged (false) */ + \
398 1 /* layoutupdate4 layout type */ + \
399 1 /* NULL filelayout layoutupdate4 payload */)
400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
402 encode_stateid_maxsz + \
403 1 /* FIXME: opaque lrf_body always empty at the moment */)
404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
405 1 + decode_stateid_maxsz)
406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
408 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
409 XDR_QUADLEN(NFS4_STATEID_SIZE))
410 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
411 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
412 XDR_QUADLEN(NFS4_STATEID_SIZE))
413 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
414 #else /* CONFIG_NFS_V4_1 */
415 #define encode_sequence_maxsz 0
416 #define decode_sequence_maxsz 0
417 #endif /* CONFIG_NFS_V4_1 */
418
419 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
420 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
421 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
422 encode_sequence_maxsz + \
423 encode_putfh_maxsz + \
424 encode_read_maxsz)
425 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
426 decode_sequence_maxsz + \
427 decode_putfh_maxsz + \
428 decode_read_maxsz)
429 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
430 encode_sequence_maxsz + \
431 encode_putfh_maxsz + \
432 encode_readlink_maxsz)
433 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_readlink_maxsz)
437 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
438 encode_sequence_maxsz + \
439 encode_putfh_maxsz + \
440 encode_readdir_maxsz)
441 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_readdir_maxsz)
445 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
446 encode_sequence_maxsz + \
447 encode_putfh_maxsz + \
448 encode_write_maxsz + \
449 encode_getattr_maxsz)
450 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
451 decode_sequence_maxsz + \
452 decode_putfh_maxsz + \
453 decode_write_maxsz + \
454 decode_getattr_maxsz)
455 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_commit_maxsz)
459 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
460 decode_sequence_maxsz + \
461 decode_putfh_maxsz + \
462 decode_commit_maxsz)
463 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_open_maxsz + \
467 encode_access_maxsz + \
468 encode_getfh_maxsz + \
469 encode_getattr_maxsz)
470 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_open_maxsz + \
474 decode_access_maxsz + \
475 decode_getfh_maxsz + \
476 decode_getattr_maxsz)
477 #define NFS4_enc_open_confirm_sz \
478 (compound_encode_hdr_maxsz + \
479 encode_putfh_maxsz + \
480 encode_open_confirm_maxsz)
481 #define NFS4_dec_open_confirm_sz \
482 (compound_decode_hdr_maxsz + \
483 decode_putfh_maxsz + \
484 decode_open_confirm_maxsz)
485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
486 encode_sequence_maxsz + \
487 encode_putfh_maxsz + \
488 encode_open_maxsz + \
489 encode_access_maxsz + \
490 encode_getattr_maxsz)
491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getattr_maxsz)
497 #define NFS4_enc_open_downgrade_sz \
498 (compound_encode_hdr_maxsz + \
499 encode_sequence_maxsz + \
500 encode_putfh_maxsz + \
501 encode_open_downgrade_maxsz + \
502 encode_getattr_maxsz)
503 #define NFS4_dec_open_downgrade_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_sequence_maxsz + \
506 decode_putfh_maxsz + \
507 decode_open_downgrade_maxsz + \
508 decode_getattr_maxsz)
509 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
510 encode_sequence_maxsz + \
511 encode_putfh_maxsz + \
512 encode_close_maxsz + \
513 encode_getattr_maxsz)
514 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_close_maxsz + \
518 decode_getattr_maxsz)
519 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
520 encode_sequence_maxsz + \
521 encode_putfh_maxsz + \
522 encode_setattr_maxsz + \
523 encode_getattr_maxsz)
524 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
525 decode_sequence_maxsz + \
526 decode_putfh_maxsz + \
527 decode_setattr_maxsz + \
528 decode_getattr_maxsz)
529 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
530 encode_sequence_maxsz + \
531 encode_putfh_maxsz + \
532 encode_fsinfo_maxsz)
533 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
534 decode_sequence_maxsz + \
535 decode_putfh_maxsz + \
536 decode_fsinfo_maxsz)
537 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
538 encode_renew_maxsz)
539 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
540 decode_renew_maxsz)
541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
542 encode_setclientid_maxsz)
543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
544 decode_setclientid_maxsz)
545 #define NFS4_enc_setclientid_confirm_sz \
546 (compound_encode_hdr_maxsz + \
547 encode_setclientid_confirm_maxsz)
548 #define NFS4_dec_setclientid_confirm_sz \
549 (compound_decode_hdr_maxsz + \
550 decode_setclientid_confirm_maxsz)
551 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
552 encode_sequence_maxsz + \
553 encode_putfh_maxsz + \
554 encode_lock_maxsz)
555 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
556 decode_sequence_maxsz + \
557 decode_putfh_maxsz + \
558 decode_lock_maxsz)
559 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
560 encode_sequence_maxsz + \
561 encode_putfh_maxsz + \
562 encode_lockt_maxsz)
563 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
564 decode_sequence_maxsz + \
565 decode_putfh_maxsz + \
566 decode_lockt_maxsz)
567 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_locku_maxsz)
571 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
572 decode_sequence_maxsz + \
573 decode_putfh_maxsz + \
574 decode_locku_maxsz)
575 #define NFS4_enc_release_lockowner_sz \
576 (compound_encode_hdr_maxsz + \
577 encode_lockowner_maxsz)
578 #define NFS4_dec_release_lockowner_sz \
579 (compound_decode_hdr_maxsz + \
580 decode_lockowner_maxsz)
581 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
582 encode_sequence_maxsz + \
583 encode_putfh_maxsz + \
584 encode_access_maxsz + \
585 encode_getattr_maxsz)
586 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
587 decode_sequence_maxsz + \
588 decode_putfh_maxsz + \
589 decode_access_maxsz + \
590 decode_getattr_maxsz)
591 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_getattr_maxsz)
595 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
596 decode_sequence_maxsz + \
597 decode_putfh_maxsz + \
598 decode_getattr_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 #define NFS4_dec_fs_locations_sz \
737 (compound_decode_hdr_maxsz + \
738 decode_sequence_maxsz + \
739 decode_putfh_maxsz + \
740 decode_lookup_maxsz + \
741 decode_fs_locations_maxsz)
742 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
743 encode_sequence_maxsz + \
744 encode_putfh_maxsz + \
745 encode_secinfo_maxsz)
746 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
747 decode_sequence_maxsz + \
748 decode_putfh_maxsz + \
749 decode_secinfo_maxsz)
750 #if defined(CONFIG_NFS_V4_1)
751 #define NFS4_enc_bind_conn_to_session_sz \
752 (compound_encode_hdr_maxsz + \
753 encode_bind_conn_to_session_maxsz)
754 #define NFS4_dec_bind_conn_to_session_sz \
755 (compound_decode_hdr_maxsz + \
756 decode_bind_conn_to_session_maxsz)
757 #define NFS4_enc_exchange_id_sz \
758 (compound_encode_hdr_maxsz + \
759 encode_exchange_id_maxsz)
760 #define NFS4_dec_exchange_id_sz \
761 (compound_decode_hdr_maxsz + \
762 decode_exchange_id_maxsz)
763 #define NFS4_enc_create_session_sz \
764 (compound_encode_hdr_maxsz + \
765 encode_create_session_maxsz)
766 #define NFS4_dec_create_session_sz \
767 (compound_decode_hdr_maxsz + \
768 decode_create_session_maxsz)
769 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
770 encode_destroy_session_maxsz)
771 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
772 decode_destroy_session_maxsz)
773 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
774 encode_destroy_clientid_maxsz)
775 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
776 decode_destroy_clientid_maxsz)
777 #define NFS4_enc_sequence_sz \
778 (compound_decode_hdr_maxsz + \
779 encode_sequence_maxsz)
780 #define NFS4_dec_sequence_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_sequence_maxsz)
783 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
784 encode_sequence_maxsz + \
785 encode_putrootfh_maxsz + \
786 encode_fsinfo_maxsz)
787 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
788 decode_sequence_maxsz + \
789 decode_putrootfh_maxsz + \
790 decode_fsinfo_maxsz)
791 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
792 encode_sequence_maxsz + \
793 encode_reclaim_complete_maxsz)
794 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
795 decode_sequence_maxsz + \
796 decode_reclaim_complete_maxsz)
797 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
798 encode_sequence_maxsz + \
799 encode_putfh_maxsz + \
800 encode_getdevicelist_maxsz)
801 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
802 decode_sequence_maxsz + \
803 decode_putfh_maxsz + \
804 decode_getdevicelist_maxsz)
805 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
806 encode_sequence_maxsz +\
807 encode_getdeviceinfo_maxsz)
808 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
809 decode_sequence_maxsz + \
810 decode_getdeviceinfo_maxsz)
811 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
812 encode_sequence_maxsz + \
813 encode_putfh_maxsz + \
814 encode_layoutget_maxsz)
815 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
816 decode_sequence_maxsz + \
817 decode_putfh_maxsz + \
818 decode_layoutget_maxsz)
819 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
820 encode_sequence_maxsz +\
821 encode_putfh_maxsz + \
822 encode_layoutcommit_maxsz + \
823 encode_getattr_maxsz)
824 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
825 decode_sequence_maxsz + \
826 decode_putfh_maxsz + \
827 decode_layoutcommit_maxsz + \
828 decode_getattr_maxsz)
829 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
830 encode_sequence_maxsz + \
831 encode_putfh_maxsz + \
832 encode_layoutreturn_maxsz)
833 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
834 decode_sequence_maxsz + \
835 decode_putfh_maxsz + \
836 decode_layoutreturn_maxsz)
837 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
838 encode_sequence_maxsz + \
839 encode_putrootfh_maxsz +\
840 encode_secinfo_no_name_maxsz)
841 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_putrootfh_maxsz + \
844 decode_secinfo_no_name_maxsz)
845 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
846 encode_sequence_maxsz + \
847 encode_test_stateid_maxsz)
848 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
849 decode_sequence_maxsz + \
850 decode_test_stateid_maxsz)
851 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
852 encode_sequence_maxsz + \
853 encode_free_stateid_maxsz)
854 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
855 decode_sequence_maxsz + \
856 decode_free_stateid_maxsz)
857
858 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
859 compound_encode_hdr_maxsz +
860 encode_sequence_maxsz +
861 encode_putfh_maxsz +
862 encode_getattr_maxsz) *
863 XDR_UNIT);
864
865 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
866 compound_decode_hdr_maxsz +
867 decode_sequence_maxsz +
868 decode_putfh_maxsz) *
869 XDR_UNIT);
870
871 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
872 compound_decode_hdr_maxsz +
873 decode_sequence_maxsz) *
874 XDR_UNIT);
875 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
876 #endif /* CONFIG_NFS_V4_1 */
877
878 static const umode_t nfs_type2fmt[] = {
879 [NF4BAD] = 0,
880 [NF4REG] = S_IFREG,
881 [NF4DIR] = S_IFDIR,
882 [NF4BLK] = S_IFBLK,
883 [NF4CHR] = S_IFCHR,
884 [NF4LNK] = S_IFLNK,
885 [NF4SOCK] = S_IFSOCK,
886 [NF4FIFO] = S_IFIFO,
887 [NF4ATTRDIR] = 0,
888 [NF4NAMEDATTR] = 0,
889 };
890
891 struct compound_hdr {
892 int32_t status;
893 uint32_t nops;
894 __be32 * nops_p;
895 uint32_t taglen;
896 char * tag;
897 uint32_t replen; /* expected reply words */
898 u32 minorversion;
899 };
900
901 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
902 {
903 __be32 *p = xdr_reserve_space(xdr, nbytes);
904 BUG_ON(!p);
905 return p;
906 }
907
908 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
909 {
910 __be32 *p;
911
912 p = xdr_reserve_space(xdr, len);
913 xdr_encode_opaque_fixed(p, buf, len);
914 }
915
916 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
917 {
918 __be32 *p;
919
920 p = reserve_space(xdr, 4 + len);
921 xdr_encode_opaque(p, str, len);
922 }
923
924 static void encode_uint32(struct xdr_stream *xdr, u32 n)
925 {
926 __be32 *p;
927
928 p = reserve_space(xdr, 4);
929 *p = cpu_to_be32(n);
930 }
931
932 static void encode_uint64(struct xdr_stream *xdr, u64 n)
933 {
934 __be32 *p;
935
936 p = reserve_space(xdr, 8);
937 xdr_encode_hyper(p, n);
938 }
939
940 static void encode_nfs4_seqid(struct xdr_stream *xdr,
941 const struct nfs_seqid *seqid)
942 {
943 encode_uint32(xdr, seqid->sequence->counter);
944 }
945
946 static void encode_compound_hdr(struct xdr_stream *xdr,
947 struct rpc_rqst *req,
948 struct compound_hdr *hdr)
949 {
950 __be32 *p;
951 struct rpc_auth *auth = req->rq_cred->cr_auth;
952
953 /* initialize running count of expected bytes in reply.
954 * NOTE: the replied tag SHOULD be the same is the one sent,
955 * but this is not required as a MUST for the server to do so. */
956 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
957
958 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
959 encode_string(xdr, hdr->taglen, hdr->tag);
960 p = reserve_space(xdr, 8);
961 *p++ = cpu_to_be32(hdr->minorversion);
962 hdr->nops_p = p;
963 *p = cpu_to_be32(hdr->nops);
964 }
965
966 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
967 uint32_t replen,
968 struct compound_hdr *hdr)
969 {
970 encode_uint32(xdr, op);
971 hdr->nops++;
972 hdr->replen += replen;
973 }
974
975 static void encode_nops(struct compound_hdr *hdr)
976 {
977 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
978 *hdr->nops_p = htonl(hdr->nops);
979 }
980
981 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
982 {
983 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
984 }
985
986 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
987 {
988 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
989 }
990
991 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
992 const struct nfs4_label *label,
993 const struct nfs_server *server)
994 {
995 char owner_name[IDMAP_NAMESZ];
996 char owner_group[IDMAP_NAMESZ];
997 int owner_namelen = 0;
998 int owner_grouplen = 0;
999 __be32 *p;
1000 __be32 *q;
1001 int len;
1002 uint32_t bmval0 = 0;
1003 uint32_t bmval1 = 0;
1004 uint32_t bmval2 = 0;
1005
1006 /*
1007 * We reserve enough space to write the entire attribute buffer at once.
1008 * In the worst-case, this would be
1009 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1010 * = 40 bytes, plus any contribution from variable-length fields
1011 * such as owner/group.
1012 */
1013 len = 20;
1014
1015 /* Sigh */
1016 if (iap->ia_valid & ATTR_SIZE)
1017 len += 8;
1018 if (iap->ia_valid & ATTR_MODE)
1019 len += 4;
1020 if (iap->ia_valid & ATTR_UID) {
1021 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1022 if (owner_namelen < 0) {
1023 dprintk("nfs: couldn't resolve uid %d to string\n",
1024 from_kuid(&init_user_ns, iap->ia_uid));
1025 /* XXX */
1026 strcpy(owner_name, "nobody");
1027 owner_namelen = sizeof("nobody") - 1;
1028 /* goto out; */
1029 }
1030 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1031 }
1032 if (iap->ia_valid & ATTR_GID) {
1033 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1034 if (owner_grouplen < 0) {
1035 dprintk("nfs: couldn't resolve gid %d to string\n",
1036 from_kgid(&init_user_ns, iap->ia_gid));
1037 strcpy(owner_group, "nobody");
1038 owner_grouplen = sizeof("nobody") - 1;
1039 /* goto out; */
1040 }
1041 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1042 }
1043 if (label)
1044 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1045 if (iap->ia_valid & ATTR_ATIME_SET)
1046 len += 16;
1047 else if (iap->ia_valid & ATTR_ATIME)
1048 len += 4;
1049 if (iap->ia_valid & ATTR_MTIME_SET)
1050 len += 16;
1051 else if (iap->ia_valid & ATTR_MTIME)
1052 len += 4;
1053 p = reserve_space(xdr, len);
1054
1055 /*
1056 * We write the bitmap length now, but leave the bitmap and the attribute
1057 * buffer length to be backfilled at the end of this routine.
1058 */
1059 *p++ = cpu_to_be32(3);
1060 q = p;
1061 p += 4;
1062
1063 if (iap->ia_valid & ATTR_SIZE) {
1064 bmval0 |= FATTR4_WORD0_SIZE;
1065 p = xdr_encode_hyper(p, iap->ia_size);
1066 }
1067 if (iap->ia_valid & ATTR_MODE) {
1068 bmval1 |= FATTR4_WORD1_MODE;
1069 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1070 }
1071 if (iap->ia_valid & ATTR_UID) {
1072 bmval1 |= FATTR4_WORD1_OWNER;
1073 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1074 }
1075 if (iap->ia_valid & ATTR_GID) {
1076 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1077 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1078 }
1079 if (iap->ia_valid & ATTR_ATIME_SET) {
1080 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1081 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1082 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1083 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1084 }
1085 else if (iap->ia_valid & ATTR_ATIME) {
1086 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1087 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1088 }
1089 if (iap->ia_valid & ATTR_MTIME_SET) {
1090 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1091 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1092 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1093 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1094 }
1095 else if (iap->ia_valid & ATTR_MTIME) {
1096 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1097 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1098 }
1099 if (label) {
1100 bmval2 |= FATTR4_WORD2_SECURITY_LABEL;
1101 *p++ = cpu_to_be32(label->lfs);
1102 *p++ = cpu_to_be32(label->pi);
1103 *p++ = cpu_to_be32(label->len);
1104 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1105 }
1106
1107 /*
1108 * Now we backfill the bitmap and the attribute buffer length.
1109 */
1110 if (len != ((char *)p - (char *)q) + 4) {
1111 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1112 len, ((char *)p - (char *)q) + 4);
1113 BUG();
1114 }
1115 len = (char *)p - (char *)q - 16;
1116 *q++ = htonl(bmval0);
1117 *q++ = htonl(bmval1);
1118 *q++ = htonl(bmval2);
1119 *q = htonl(len);
1120
1121 /* out: */
1122 }
1123
1124 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1125 {
1126 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1127 encode_uint32(xdr, access);
1128 }
1129
1130 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1131 {
1132 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1133 encode_nfs4_seqid(xdr, arg->seqid);
1134 encode_nfs4_stateid(xdr, arg->stateid);
1135 }
1136
1137 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1138 {
1139 __be32 *p;
1140
1141 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1142 p = reserve_space(xdr, 12);
1143 p = xdr_encode_hyper(p, args->offset);
1144 *p = cpu_to_be32(args->count);
1145 }
1146
1147 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1148 {
1149 __be32 *p;
1150
1151 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1152 encode_uint32(xdr, create->ftype);
1153
1154 switch (create->ftype) {
1155 case NF4LNK:
1156 p = reserve_space(xdr, 4);
1157 *p = cpu_to_be32(create->u.symlink.len);
1158 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1159 break;
1160
1161 case NF4BLK: case NF4CHR:
1162 p = reserve_space(xdr, 8);
1163 *p++ = cpu_to_be32(create->u.device.specdata1);
1164 *p = cpu_to_be32(create->u.device.specdata2);
1165 break;
1166
1167 default:
1168 break;
1169 }
1170
1171 encode_string(xdr, create->name->len, create->name->name);
1172 encode_attrs(xdr, create->attrs, create->label, create->server);
1173 }
1174
1175 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1176 {
1177 __be32 *p;
1178
1179 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1180 p = reserve_space(xdr, 8);
1181 *p++ = cpu_to_be32(1);
1182 *p = cpu_to_be32(bitmap);
1183 }
1184
1185 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1186 {
1187 __be32 *p;
1188
1189 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1190 p = reserve_space(xdr, 12);
1191 *p++ = cpu_to_be32(2);
1192 *p++ = cpu_to_be32(bm0);
1193 *p = cpu_to_be32(bm1);
1194 }
1195
1196 static void
1197 encode_getattr_three(struct xdr_stream *xdr,
1198 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1199 struct compound_hdr *hdr)
1200 {
1201 __be32 *p;
1202
1203 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204 if (bm2) {
1205 p = reserve_space(xdr, 16);
1206 *p++ = cpu_to_be32(3);
1207 *p++ = cpu_to_be32(bm0);
1208 *p++ = cpu_to_be32(bm1);
1209 *p = cpu_to_be32(bm2);
1210 } else if (bm1) {
1211 p = reserve_space(xdr, 12);
1212 *p++ = cpu_to_be32(2);
1213 *p++ = cpu_to_be32(bm0);
1214 *p = cpu_to_be32(bm1);
1215 } else {
1216 p = reserve_space(xdr, 8);
1217 *p++ = cpu_to_be32(1);
1218 *p = cpu_to_be32(bm0);
1219 }
1220 }
1221
1222 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1223 {
1224 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1225 bitmask[1] & nfs4_fattr_bitmap[1],
1226 bitmask[2] & nfs4_fattr_bitmap[2],
1227 hdr);
1228 }
1229
1230 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1231 const u32 *open_bitmap,
1232 struct compound_hdr *hdr)
1233 {
1234 encode_getattr_three(xdr,
1235 bitmask[0] & open_bitmap[0],
1236 bitmask[1] & open_bitmap[1],
1237 bitmask[2] & open_bitmap[2],
1238 hdr);
1239 }
1240
1241 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1242 {
1243 encode_getattr_three(xdr,
1244 bitmask[0] & nfs4_fsinfo_bitmap[0],
1245 bitmask[1] & nfs4_fsinfo_bitmap[1],
1246 bitmask[2] & nfs4_fsinfo_bitmap[2],
1247 hdr);
1248 }
1249
1250 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1253 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1254 }
1255
1256 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1257 {
1258 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1259 }
1260
1261 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1262 {
1263 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1264 encode_string(xdr, name->len, name->name);
1265 }
1266
1267 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1268 {
1269 if (fl->fl_type == F_RDLCK)
1270 return block ? NFS4_READW_LT : NFS4_READ_LT;
1271 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1272 }
1273
1274 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1275 {
1276 if (fl->fl_end == OFFSET_MAX)
1277 return ~(uint64_t)0;
1278 return fl->fl_end - fl->fl_start + 1;
1279 }
1280
1281 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1282 {
1283 __be32 *p;
1284
1285 p = reserve_space(xdr, 32);
1286 p = xdr_encode_hyper(p, lowner->clientid);
1287 *p++ = cpu_to_be32(20);
1288 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1289 *p++ = cpu_to_be32(lowner->s_dev);
1290 xdr_encode_hyper(p, lowner->id);
1291 }
1292
1293 /*
1294 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1295 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1296 */
1297 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1298 {
1299 __be32 *p;
1300
1301 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1302 p = reserve_space(xdr, 28);
1303 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1304 *p++ = cpu_to_be32(args->reclaim);
1305 p = xdr_encode_hyper(p, args->fl->fl_start);
1306 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1307 *p = cpu_to_be32(args->new_lock_owner);
1308 if (args->new_lock_owner){
1309 encode_nfs4_seqid(xdr, args->open_seqid);
1310 encode_nfs4_stateid(xdr, args->open_stateid);
1311 encode_nfs4_seqid(xdr, args->lock_seqid);
1312 encode_lockowner(xdr, &args->lock_owner);
1313 }
1314 else {
1315 encode_nfs4_stateid(xdr, args->lock_stateid);
1316 encode_nfs4_seqid(xdr, args->lock_seqid);
1317 }
1318 }
1319
1320 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1321 {
1322 __be32 *p;
1323
1324 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1325 p = reserve_space(xdr, 20);
1326 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1327 p = xdr_encode_hyper(p, args->fl->fl_start);
1328 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1329 encode_lockowner(xdr, &args->lock_owner);
1330 }
1331
1332 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1333 {
1334 __be32 *p;
1335
1336 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1337 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1338 encode_nfs4_seqid(xdr, args->seqid);
1339 encode_nfs4_stateid(xdr, args->stateid);
1340 p = reserve_space(xdr, 16);
1341 p = xdr_encode_hyper(p, args->fl->fl_start);
1342 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343 }
1344
1345 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1346 {
1347 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1348 encode_lockowner(xdr, lowner);
1349 }
1350
1351 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1352 {
1353 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1354 encode_string(xdr, name->len, name->name);
1355 }
1356
1357 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1358 {
1359 __be32 *p;
1360
1361 p = reserve_space(xdr, 8);
1362 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1363 case FMODE_READ:
1364 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1365 break;
1366 case FMODE_WRITE:
1367 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1368 break;
1369 case FMODE_READ|FMODE_WRITE:
1370 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1371 break;
1372 default:
1373 *p++ = cpu_to_be32(0);
1374 }
1375 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1376 }
1377
1378 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1379 {
1380 __be32 *p;
1381 /*
1382 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1383 * owner 4 = 32
1384 */
1385 encode_nfs4_seqid(xdr, arg->seqid);
1386 encode_share_access(xdr, arg->fmode);
1387 p = reserve_space(xdr, 36);
1388 p = xdr_encode_hyper(p, arg->clientid);
1389 *p++ = cpu_to_be32(24);
1390 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1391 *p++ = cpu_to_be32(arg->server->s_dev);
1392 *p++ = cpu_to_be32(arg->id.uniquifier);
1393 xdr_encode_hyper(p, arg->id.create_time);
1394 }
1395
1396 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398 struct iattr dummy;
1399 __be32 *p;
1400
1401 p = reserve_space(xdr, 4);
1402 switch(arg->createmode) {
1403 case NFS4_CREATE_UNCHECKED:
1404 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1405 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1406 break;
1407 case NFS4_CREATE_GUARDED:
1408 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1409 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1410 break;
1411 case NFS4_CREATE_EXCLUSIVE:
1412 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1413 encode_nfs4_verifier(xdr, &arg->u.verifier);
1414 break;
1415 case NFS4_CREATE_EXCLUSIVE4_1:
1416 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1417 encode_nfs4_verifier(xdr, &arg->u.verifier);
1418 dummy.ia_valid = 0;
1419 encode_attrs(xdr, &dummy, arg->label, arg->server);
1420 }
1421 }
1422
1423 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424 {
1425 __be32 *p;
1426
1427 p = reserve_space(xdr, 4);
1428 switch (arg->open_flags & O_CREAT) {
1429 case 0:
1430 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431 break;
1432 default:
1433 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434 encode_createmode(xdr, arg);
1435 }
1436 }
1437
1438 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439 {
1440 __be32 *p;
1441
1442 p = reserve_space(xdr, 4);
1443 switch (delegation_type) {
1444 case 0:
1445 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446 break;
1447 case FMODE_READ:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449 break;
1450 case FMODE_WRITE|FMODE_READ:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452 break;
1453 default:
1454 BUG();
1455 }
1456 }
1457
1458 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459 {
1460 __be32 *p;
1461
1462 p = reserve_space(xdr, 4);
1463 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464 encode_string(xdr, name->len, name->name);
1465 }
1466
1467 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468 {
1469 __be32 *p;
1470
1471 p = reserve_space(xdr, 4);
1472 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473 encode_delegation_type(xdr, type);
1474 }
1475
1476 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477 {
1478 __be32 *p;
1479
1480 p = reserve_space(xdr, 4);
1481 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482 encode_nfs4_stateid(xdr, stateid);
1483 encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_fh(struct xdr_stream *xdr)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492 }
1493
1494 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495 {
1496 __be32 *p;
1497
1498 p = reserve_space(xdr, 4);
1499 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500 encode_nfs4_stateid(xdr, stateid);
1501 }
1502
1503 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504 {
1505 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506 encode_openhdr(xdr, arg);
1507 encode_opentype(xdr, arg);
1508 switch (arg->claim) {
1509 case NFS4_OPEN_CLAIM_NULL:
1510 encode_claim_null(xdr, arg->name);
1511 break;
1512 case NFS4_OPEN_CLAIM_PREVIOUS:
1513 encode_claim_previous(xdr, arg->u.delegation_type);
1514 break;
1515 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517 break;
1518 case NFS4_OPEN_CLAIM_FH:
1519 encode_claim_fh(xdr);
1520 break;
1521 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523 break;
1524 default:
1525 BUG();
1526 }
1527 }
1528
1529 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530 {
1531 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532 encode_nfs4_stateid(xdr, arg->stateid);
1533 encode_nfs4_seqid(xdr, arg->seqid);
1534 }
1535
1536 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537 {
1538 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539 encode_nfs4_stateid(xdr, arg->stateid);
1540 encode_nfs4_seqid(xdr, arg->seqid);
1541 encode_share_access(xdr, arg->fmode);
1542 }
1543
1544 static void
1545 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546 {
1547 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548 encode_string(xdr, fh->size, fh->data);
1549 }
1550
1551 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552 {
1553 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554 }
1555
1556 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1557 {
1558 __be32 *p;
1559
1560 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1561 encode_nfs4_stateid(xdr, &args->stateid);
1562
1563 p = reserve_space(xdr, 12);
1564 p = xdr_encode_hyper(p, args->offset);
1565 *p = cpu_to_be32(args->count);
1566 }
1567
1568 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1569 {
1570 uint32_t attrs[3] = {
1571 FATTR4_WORD0_RDATTR_ERROR,
1572 FATTR4_WORD1_MOUNTED_ON_FILEID,
1573 };
1574 uint32_t dircount = readdir->count >> 1;
1575 __be32 *p, verf[2];
1576
1577 if (readdir->plus) {
1578 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1579 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1580 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1581 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1582 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1583 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1584 dircount >>= 1;
1585 }
1586 /* Use mounted_on_fileid only if the server supports it */
1587 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1588 attrs[0] |= FATTR4_WORD0_FILEID;
1589
1590 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1591 encode_uint64(xdr, readdir->cookie);
1592 encode_nfs4_verifier(xdr, &readdir->verifier);
1593 p = reserve_space(xdr, encode_readdir_space);
1594 *p++ = cpu_to_be32(dircount);
1595 *p++ = cpu_to_be32(readdir->count);
1596 *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1597 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1598 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1599 if (encode_readdir_bitmask_sz > 2) {
1600 if (hdr->minorversion > 1)
1601 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1602 p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1603 }
1604 memcpy(verf, readdir->verifier.data, sizeof(verf));
1605
1606 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1607 __func__,
1608 (unsigned long long)readdir->cookie,
1609 verf[0], verf[1],
1610 attrs[0] & readdir->bitmask[0],
1611 attrs[1] & readdir->bitmask[1],
1612 attrs[2] & readdir->bitmask[2]);
1613 }
1614
1615 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1616 {
1617 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1618 }
1619
1620 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1621 {
1622 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1623 encode_string(xdr, name->len, name->name);
1624 }
1625
1626 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1627 {
1628 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1629 encode_string(xdr, oldname->len, oldname->name);
1630 encode_string(xdr, newname->len, newname->name);
1631 }
1632
1633 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1634 struct compound_hdr *hdr)
1635 {
1636 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1637 encode_uint64(xdr, clid);
1638 }
1639
1640 static void
1641 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1644 }
1645
1646 static void
1647 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1648 {
1649 __be32 *p;
1650
1651 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1652 encode_nfs4_stateid(xdr, &zero_stateid);
1653 p = reserve_space(xdr, 2*4);
1654 *p++ = cpu_to_be32(1);
1655 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656 p = reserve_space(xdr, 4);
1657 *p = cpu_to_be32(arg->acl_len);
1658 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1659 }
1660
1661 static void
1662 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1663 {
1664 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1665 }
1666
1667 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1670 encode_nfs4_stateid(xdr, &arg->stateid);
1671 encode_attrs(xdr, arg->iap, arg->label, server);
1672 }
1673
1674 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1675 {
1676 __be32 *p;
1677
1678 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1679 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1680
1681 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1682 p = reserve_space(xdr, 4);
1683 *p = cpu_to_be32(setclientid->sc_prog);
1684 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1685 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1686 p = reserve_space(xdr, 4);
1687 *p = cpu_to_be32(setclientid->sc_cb_ident);
1688 }
1689
1690 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1691 {
1692 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1693 decode_setclientid_confirm_maxsz, hdr);
1694 encode_uint64(xdr, arg->clientid);
1695 encode_nfs4_verifier(xdr, &arg->confirm);
1696 }
1697
1698 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1699 {
1700 __be32 *p;
1701
1702 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1703 encode_nfs4_stateid(xdr, &args->stateid);
1704
1705 p = reserve_space(xdr, 16);
1706 p = xdr_encode_hyper(p, args->offset);
1707 *p++ = cpu_to_be32(args->stable);
1708 *p = cpu_to_be32(args->count);
1709
1710 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1711 }
1712
1713 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1714 {
1715 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1716 encode_nfs4_stateid(xdr, stateid);
1717 }
1718
1719 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1722 encode_string(xdr, name->len, name->name);
1723 }
1724
1725 #if defined(CONFIG_NFS_V4_1)
1726 /* NFSv4.1 operations */
1727 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1728 struct nfs4_session *session,
1729 struct compound_hdr *hdr)
1730 {
1731 __be32 *p;
1732
1733 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1734 decode_bind_conn_to_session_maxsz, hdr);
1735 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1736 p = xdr_reserve_space(xdr, 8);
1737 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1738 *p = 0; /* use_conn_in_rdma_mode = False */
1739 }
1740
1741 static void encode_exchange_id(struct xdr_stream *xdr,
1742 struct nfs41_exchange_id_args *args,
1743 struct compound_hdr *hdr)
1744 {
1745 __be32 *p;
1746 char impl_name[IMPL_NAME_LIMIT];
1747 int len = 0;
1748
1749 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1750 encode_nfs4_verifier(xdr, args->verifier);
1751
1752 encode_string(xdr, args->id_len, args->id);
1753
1754 p = reserve_space(xdr, 12);
1755 *p++ = cpu_to_be32(args->flags);
1756 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */
1757
1758 if (send_implementation_id &&
1759 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1760 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1761 <= sizeof(impl_name) + 1)
1762 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1763 utsname()->sysname, utsname()->release,
1764 utsname()->version, utsname()->machine);
1765
1766 if (len > 0) {
1767 *p = cpu_to_be32(1); /* implementation id array length=1 */
1768
1769 encode_string(xdr,
1770 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1771 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1772 encode_string(xdr, len, impl_name);
1773 /* just send zeros for nii_date - the date is in nii_name */
1774 p = reserve_space(xdr, 12);
1775 p = xdr_encode_hyper(p, 0);
1776 *p = cpu_to_be32(0);
1777 } else
1778 *p = cpu_to_be32(0); /* implementation id array length=0 */
1779 }
1780
1781 static void encode_create_session(struct xdr_stream *xdr,
1782 struct nfs41_create_session_args *args,
1783 struct compound_hdr *hdr)
1784 {
1785 __be32 *p;
1786 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1787 uint32_t len;
1788 struct nfs_client *clp = args->client;
1789 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1790 u32 max_resp_sz_cached;
1791
1792 /*
1793 * Assumes OPEN is the biggest non-idempotent compound.
1794 * 2 is the verifier.
1795 */
1796 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1797 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1798
1799 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1800 clp->cl_ipaddr);
1801
1802 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1803 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1804 p = xdr_encode_hyper(p, clp->cl_clientid);
1805 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1806 *p++ = cpu_to_be32(args->flags); /*flags */
1807
1808 /* Fore Channel */
1809 *p++ = cpu_to_be32(0); /* header padding size */
1810 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1811 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1812 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1813 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1814 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1815 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1816
1817 /* Back Channel */
1818 *p++ = cpu_to_be32(0); /* header padding size */
1819 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1820 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1821 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1822 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1823 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1824 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1825
1826 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1827 *p++ = cpu_to_be32(1);
1828 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1829
1830 /* authsys_parms rfc1831 */
1831 *p++ = (__be32)nn->boot_time.tv_nsec; /* stamp */
1832 p = xdr_encode_opaque(p, machine_name, len);
1833 *p++ = cpu_to_be32(0); /* UID */
1834 *p++ = cpu_to_be32(0); /* GID */
1835 *p = cpu_to_be32(0); /* No more gids */
1836 }
1837
1838 static void encode_destroy_session(struct xdr_stream *xdr,
1839 struct nfs4_session *session,
1840 struct compound_hdr *hdr)
1841 {
1842 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1843 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1844 }
1845
1846 static void encode_destroy_clientid(struct xdr_stream *xdr,
1847 uint64_t clientid,
1848 struct compound_hdr *hdr)
1849 {
1850 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1851 encode_uint64(xdr, clientid);
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855 struct nfs41_reclaim_complete_args *args,
1856 struct compound_hdr *hdr)
1857 {
1858 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1859 encode_uint32(xdr, args->one_fs);
1860 }
1861 #endif /* CONFIG_NFS_V4_1 */
1862
1863 static void encode_sequence(struct xdr_stream *xdr,
1864 const struct nfs4_sequence_args *args,
1865 struct compound_hdr *hdr)
1866 {
1867 #if defined(CONFIG_NFS_V4_1)
1868 struct nfs4_session *session;
1869 struct nfs4_slot_table *tp;
1870 struct nfs4_slot *slot = args->sa_slot;
1871 __be32 *p;
1872
1873 if (slot == NULL)
1874 return;
1875
1876 tp = slot->table;
1877 session = tp->session;
1878
1879 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1880
1881 /*
1882 * Sessionid + seqid + slotid + max slotid + cache_this
1883 */
1884 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1885 "max_slotid=%d cache_this=%d\n",
1886 __func__,
1887 ((u32 *)session->sess_id.data)[0],
1888 ((u32 *)session->sess_id.data)[1],
1889 ((u32 *)session->sess_id.data)[2],
1890 ((u32 *)session->sess_id.data)[3],
1891 slot->seq_nr, slot->slot_nr,
1892 tp->highest_used_slotid, args->sa_cache_this);
1893 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1894 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1895 *p++ = cpu_to_be32(slot->seq_nr);
1896 *p++ = cpu_to_be32(slot->slot_nr);
1897 *p++ = cpu_to_be32(tp->highest_used_slotid);
1898 *p = cpu_to_be32(args->sa_cache_this);
1899 #endif /* CONFIG_NFS_V4_1 */
1900 }
1901
1902 #ifdef CONFIG_NFS_V4_1
1903 static void
1904 encode_getdevicelist(struct xdr_stream *xdr,
1905 const struct nfs4_getdevicelist_args *args,
1906 struct compound_hdr *hdr)
1907 {
1908 __be32 *p;
1909 nfs4_verifier dummy = {
1910 .data = "dummmmmy",
1911 };
1912
1913 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1914 p = reserve_space(xdr, 16);
1915 *p++ = cpu_to_be32(args->layoutclass);
1916 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1917 xdr_encode_hyper(p, 0ULL); /* cookie */
1918 encode_nfs4_verifier(xdr, &dummy);
1919 }
1920
1921 static void
1922 encode_getdeviceinfo(struct xdr_stream *xdr,
1923 const struct nfs4_getdeviceinfo_args *args,
1924 struct compound_hdr *hdr)
1925 {
1926 __be32 *p;
1927
1928 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1929 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1930 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1931 NFS4_DEVICEID4_SIZE);
1932 *p++ = cpu_to_be32(args->pdev->layout_type);
1933 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1934 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1935 }
1936
1937 static void
1938 encode_layoutget(struct xdr_stream *xdr,
1939 const struct nfs4_layoutget_args *args,
1940 struct compound_hdr *hdr)
1941 {
1942 __be32 *p;
1943
1944 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1945 p = reserve_space(xdr, 36);
1946 *p++ = cpu_to_be32(0); /* Signal layout available */
1947 *p++ = cpu_to_be32(args->type);
1948 *p++ = cpu_to_be32(args->range.iomode);
1949 p = xdr_encode_hyper(p, args->range.offset);
1950 p = xdr_encode_hyper(p, args->range.length);
1951 p = xdr_encode_hyper(p, args->minlength);
1952 encode_nfs4_stateid(xdr, &args->stateid);
1953 encode_uint32(xdr, args->maxcount);
1954
1955 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1956 __func__,
1957 args->type,
1958 args->range.iomode,
1959 (unsigned long)args->range.offset,
1960 (unsigned long)args->range.length,
1961 args->maxcount);
1962 }
1963
1964 static int
1965 encode_layoutcommit(struct xdr_stream *xdr,
1966 struct inode *inode,
1967 const struct nfs4_layoutcommit_args *args,
1968 struct compound_hdr *hdr)
1969 {
1970 __be32 *p;
1971
1972 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1973 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1974
1975 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1976 p = reserve_space(xdr, 20);
1977 /* Only whole file layouts */
1978 p = xdr_encode_hyper(p, 0); /* offset */
1979 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1980 *p = cpu_to_be32(0); /* reclaim */
1981 encode_nfs4_stateid(xdr, &args->stateid);
1982 p = reserve_space(xdr, 20);
1983 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1984 p = xdr_encode_hyper(p, args->lastbytewritten);
1985 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1986 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1987
1988 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1989 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1990 NFS_I(inode)->layout, xdr, args);
1991 else
1992 encode_uint32(xdr, 0); /* no layout-type payload */
1993
1994 return 0;
1995 }
1996
1997 static void
1998 encode_layoutreturn(struct xdr_stream *xdr,
1999 const struct nfs4_layoutreturn_args *args,
2000 struct compound_hdr *hdr)
2001 {
2002 __be32 *p;
2003
2004 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2005 p = reserve_space(xdr, 16);
2006 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2007 *p++ = cpu_to_be32(args->layout_type);
2008 *p++ = cpu_to_be32(IOMODE_ANY);
2009 *p = cpu_to_be32(RETURN_FILE);
2010 p = reserve_space(xdr, 16);
2011 p = xdr_encode_hyper(p, 0);
2012 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2013 spin_lock(&args->inode->i_lock);
2014 encode_nfs4_stateid(xdr, &args->stateid);
2015 spin_unlock(&args->inode->i_lock);
2016 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2017 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2018 NFS_I(args->inode)->layout, xdr, args);
2019 } else
2020 encode_uint32(xdr, 0);
2021 }
2022
2023 static int
2024 encode_secinfo_no_name(struct xdr_stream *xdr,
2025 const struct nfs41_secinfo_no_name_args *args,
2026 struct compound_hdr *hdr)
2027 {
2028 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2029 encode_uint32(xdr, args->style);
2030 return 0;
2031 }
2032
2033 static void encode_test_stateid(struct xdr_stream *xdr,
2034 struct nfs41_test_stateid_args *args,
2035 struct compound_hdr *hdr)
2036 {
2037 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2038 encode_uint32(xdr, 1);
2039 encode_nfs4_stateid(xdr, args->stateid);
2040 }
2041
2042 static void encode_free_stateid(struct xdr_stream *xdr,
2043 struct nfs41_free_stateid_args *args,
2044 struct compound_hdr *hdr)
2045 {
2046 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2047 encode_nfs4_stateid(xdr, &args->stateid);
2048 }
2049 #endif /* CONFIG_NFS_V4_1 */
2050
2051 /*
2052 * END OF "GENERIC" ENCODE ROUTINES.
2053 */
2054
2055 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2056 {
2057 #if defined(CONFIG_NFS_V4_1)
2058
2059 if (args->sa_slot)
2060 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2061 #endif /* CONFIG_NFS_V4_1 */
2062 return 0;
2063 }
2064
2065 /*
2066 * Encode an ACCESS request
2067 */
2068 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2069 const struct nfs4_accessargs *args)
2070 {
2071 struct compound_hdr hdr = {
2072 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2073 };
2074
2075 encode_compound_hdr(xdr, req, &hdr);
2076 encode_sequence(xdr, &args->seq_args, &hdr);
2077 encode_putfh(xdr, args->fh, &hdr);
2078 encode_access(xdr, args->access, &hdr);
2079 encode_getfattr(xdr, args->bitmask, &hdr);
2080 encode_nops(&hdr);
2081 }
2082
2083 /*
2084 * Encode LOOKUP request
2085 */
2086 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2087 const struct nfs4_lookup_arg *args)
2088 {
2089 struct compound_hdr hdr = {
2090 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2091 };
2092
2093 encode_compound_hdr(xdr, req, &hdr);
2094 encode_sequence(xdr, &args->seq_args, &hdr);
2095 encode_putfh(xdr, args->dir_fh, &hdr);
2096 encode_lookup(xdr, args->name, &hdr);
2097 encode_getfh(xdr, &hdr);
2098 encode_getfattr(xdr, args->bitmask, &hdr);
2099 encode_nops(&hdr);
2100 }
2101
2102 /*
2103 * Encode LOOKUP_ROOT request
2104 */
2105 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2106 struct xdr_stream *xdr,
2107 const struct nfs4_lookup_root_arg *args)
2108 {
2109 struct compound_hdr hdr = {
2110 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2111 };
2112
2113 encode_compound_hdr(xdr, req, &hdr);
2114 encode_sequence(xdr, &args->seq_args, &hdr);
2115 encode_putrootfh(xdr, &hdr);
2116 encode_getfh(xdr, &hdr);
2117 encode_getfattr(xdr, args->bitmask, &hdr);
2118 encode_nops(&hdr);
2119 }
2120
2121 /*
2122 * Encode REMOVE request
2123 */
2124 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2125 const struct nfs_removeargs *args)
2126 {
2127 struct compound_hdr hdr = {
2128 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2129 };
2130
2131 encode_compound_hdr(xdr, req, &hdr);
2132 encode_sequence(xdr, &args->seq_args, &hdr);
2133 encode_putfh(xdr, args->fh, &hdr);
2134 encode_remove(xdr, &args->name, &hdr);
2135 encode_nops(&hdr);
2136 }
2137
2138 /*
2139 * Encode RENAME request
2140 */
2141 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2142 const struct nfs_renameargs *args)
2143 {
2144 struct compound_hdr hdr = {
2145 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2146 };
2147
2148 encode_compound_hdr(xdr, req, &hdr);
2149 encode_sequence(xdr, &args->seq_args, &hdr);
2150 encode_putfh(xdr, args->old_dir, &hdr);
2151 encode_savefh(xdr, &hdr);
2152 encode_putfh(xdr, args->new_dir, &hdr);
2153 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2154 encode_nops(&hdr);
2155 }
2156
2157 /*
2158 * Encode LINK request
2159 */
2160 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2161 const struct nfs4_link_arg *args)
2162 {
2163 struct compound_hdr hdr = {
2164 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2165 };
2166
2167 encode_compound_hdr(xdr, req, &hdr);
2168 encode_sequence(xdr, &args->seq_args, &hdr);
2169 encode_putfh(xdr, args->fh, &hdr);
2170 encode_savefh(xdr, &hdr);
2171 encode_putfh(xdr, args->dir_fh, &hdr);
2172 encode_link(xdr, args->name, &hdr);
2173 encode_restorefh(xdr, &hdr);
2174 encode_getfattr(xdr, args->bitmask, &hdr);
2175 encode_nops(&hdr);
2176 }
2177
2178 /*
2179 * Encode CREATE request
2180 */
2181 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2182 const struct nfs4_create_arg *args)
2183 {
2184 struct compound_hdr hdr = {
2185 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2186 };
2187
2188 encode_compound_hdr(xdr, req, &hdr);
2189 encode_sequence(xdr, &args->seq_args, &hdr);
2190 encode_putfh(xdr, args->dir_fh, &hdr);
2191 encode_create(xdr, args, &hdr);
2192 encode_getfh(xdr, &hdr);
2193 encode_getfattr(xdr, args->bitmask, &hdr);
2194 encode_nops(&hdr);
2195 }
2196
2197 /*
2198 * Encode SYMLINK request
2199 */
2200 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2201 const struct nfs4_create_arg *args)
2202 {
2203 nfs4_xdr_enc_create(req, xdr, args);
2204 }
2205
2206 /*
2207 * Encode GETATTR request
2208 */
2209 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2210 const struct nfs4_getattr_arg *args)
2211 {
2212 struct compound_hdr hdr = {
2213 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2214 };
2215
2216 encode_compound_hdr(xdr, req, &hdr);
2217 encode_sequence(xdr, &args->seq_args, &hdr);
2218 encode_putfh(xdr, args->fh, &hdr);
2219 encode_getfattr(xdr, args->bitmask, &hdr);
2220 encode_nops(&hdr);
2221 }
2222
2223 /*
2224 * Encode a CLOSE request
2225 */
2226 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2227 struct nfs_closeargs *args)
2228 {
2229 struct compound_hdr hdr = {
2230 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231 };
2232
2233 encode_compound_hdr(xdr, req, &hdr);
2234 encode_sequence(xdr, &args->seq_args, &hdr);
2235 encode_putfh(xdr, args->fh, &hdr);
2236 encode_close(xdr, args, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239 }
2240
2241 /*
2242 * Encode an OPEN request
2243 */
2244 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2245 struct nfs_openargs *args)
2246 {
2247 struct compound_hdr hdr = {
2248 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2249 };
2250
2251 encode_compound_hdr(xdr, req, &hdr);
2252 encode_sequence(xdr, &args->seq_args, &hdr);
2253 encode_putfh(xdr, args->fh, &hdr);
2254 encode_open(xdr, args, &hdr);
2255 encode_getfh(xdr, &hdr);
2256 if (args->access)
2257 encode_access(xdr, args->access, &hdr);
2258 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2259 encode_nops(&hdr);
2260 }
2261
2262 /*
2263 * Encode an OPEN_CONFIRM request
2264 */
2265 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2266 struct xdr_stream *xdr,
2267 struct nfs_open_confirmargs *args)
2268 {
2269 struct compound_hdr hdr = {
2270 .nops = 0,
2271 };
2272
2273 encode_compound_hdr(xdr, req, &hdr);
2274 encode_putfh(xdr, args->fh, &hdr);
2275 encode_open_confirm(xdr, args, &hdr);
2276 encode_nops(&hdr);
2277 }
2278
2279 /*
2280 * Encode an OPEN request with no attributes.
2281 */
2282 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2283 struct xdr_stream *xdr,
2284 struct nfs_openargs *args)
2285 {
2286 struct compound_hdr hdr = {
2287 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2288 };
2289
2290 encode_compound_hdr(xdr, req, &hdr);
2291 encode_sequence(xdr, &args->seq_args, &hdr);
2292 encode_putfh(xdr, args->fh, &hdr);
2293 encode_open(xdr, args, &hdr);
2294 if (args->access)
2295 encode_access(xdr, args->access, &hdr);
2296 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2297 encode_nops(&hdr);
2298 }
2299
2300 /*
2301 * Encode an OPEN_DOWNGRADE request
2302 */
2303 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2304 struct xdr_stream *xdr,
2305 struct nfs_closeargs *args)
2306 {
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 encode_open_downgrade(xdr, args, &hdr);
2315 encode_getfattr(xdr, args->bitmask, &hdr);
2316 encode_nops(&hdr);
2317 }
2318
2319 /*
2320 * Encode a LOCK request
2321 */
2322 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2323 struct nfs_lock_args *args)
2324 {
2325 struct compound_hdr hdr = {
2326 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2327 };
2328
2329 encode_compound_hdr(xdr, req, &hdr);
2330 encode_sequence(xdr, &args->seq_args, &hdr);
2331 encode_putfh(xdr, args->fh, &hdr);
2332 encode_lock(xdr, args, &hdr);
2333 encode_nops(&hdr);
2334 }
2335
2336 /*
2337 * Encode a LOCKT request
2338 */
2339 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2340 struct nfs_lockt_args *args)
2341 {
2342 struct compound_hdr hdr = {
2343 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2344 };
2345
2346 encode_compound_hdr(xdr, req, &hdr);
2347 encode_sequence(xdr, &args->seq_args, &hdr);
2348 encode_putfh(xdr, args->fh, &hdr);
2349 encode_lockt(xdr, args, &hdr);
2350 encode_nops(&hdr);
2351 }
2352
2353 /*
2354 * Encode a LOCKU request
2355 */
2356 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2357 struct nfs_locku_args *args)
2358 {
2359 struct compound_hdr hdr = {
2360 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361 };
2362
2363 encode_compound_hdr(xdr, req, &hdr);
2364 encode_sequence(xdr, &args->seq_args, &hdr);
2365 encode_putfh(xdr, args->fh, &hdr);
2366 encode_locku(xdr, args, &hdr);
2367 encode_nops(&hdr);
2368 }
2369
2370 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2371 struct xdr_stream *xdr,
2372 struct nfs_release_lockowner_args *args)
2373 {
2374 struct compound_hdr hdr = {
2375 .minorversion = 0,
2376 };
2377
2378 encode_compound_hdr(xdr, req, &hdr);
2379 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2380 encode_nops(&hdr);
2381 }
2382
2383 /*
2384 * Encode a READLINK request
2385 */
2386 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2387 const struct nfs4_readlink *args)
2388 {
2389 struct compound_hdr hdr = {
2390 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2391 };
2392
2393 encode_compound_hdr(xdr, req, &hdr);
2394 encode_sequence(xdr, &args->seq_args, &hdr);
2395 encode_putfh(xdr, args->fh, &hdr);
2396 encode_readlink(xdr, args, req, &hdr);
2397
2398 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2399 args->pgbase, args->pglen);
2400 encode_nops(&hdr);
2401 }
2402
2403 /*
2404 * Encode a READDIR request
2405 */
2406 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2407 const struct nfs4_readdir_arg *args)
2408 {
2409 struct compound_hdr hdr = {
2410 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2411 };
2412
2413 encode_compound_hdr(xdr, req, &hdr);
2414 encode_sequence(xdr, &args->seq_args, &hdr);
2415 encode_putfh(xdr, args->fh, &hdr);
2416 encode_readdir(xdr, args, req, &hdr);
2417
2418 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2419 args->pgbase, args->count);
2420 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2421 __func__, hdr.replen << 2, args->pages,
2422 args->pgbase, args->count);
2423 encode_nops(&hdr);
2424 }
2425
2426 /*
2427 * Encode a READ request
2428 */
2429 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2430 struct nfs_readargs *args)
2431 {
2432 struct compound_hdr hdr = {
2433 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434 };
2435
2436 encode_compound_hdr(xdr, req, &hdr);
2437 encode_sequence(xdr, &args->seq_args, &hdr);
2438 encode_putfh(xdr, args->fh, &hdr);
2439 encode_read(xdr, args, &hdr);
2440
2441 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2442 args->pages, args->pgbase, args->count);
2443 req->rq_rcv_buf.flags |= XDRBUF_READ;
2444 encode_nops(&hdr);
2445 }
2446
2447 /*
2448 * Encode an SETATTR request
2449 */
2450 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2451 struct nfs_setattrargs *args)
2452 {
2453 struct compound_hdr hdr = {
2454 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455 };
2456
2457 encode_compound_hdr(xdr, req, &hdr);
2458 encode_sequence(xdr, &args->seq_args, &hdr);
2459 encode_putfh(xdr, args->fh, &hdr);
2460 encode_setattr(xdr, args, args->server, &hdr);
2461 encode_getfattr(xdr, args->bitmask, &hdr);
2462 encode_nops(&hdr);
2463 }
2464
2465 /*
2466 * Encode a GETACL request
2467 */
2468 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2469 struct nfs_getaclargs *args)
2470 {
2471 struct compound_hdr hdr = {
2472 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2473 };
2474 uint32_t replen;
2475
2476 encode_compound_hdr(xdr, req, &hdr);
2477 encode_sequence(xdr, &args->seq_args, &hdr);
2478 encode_putfh(xdr, args->fh, &hdr);
2479 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2480 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2481
2482 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2483 args->acl_pages, args->acl_pgbase, args->acl_len);
2484
2485 encode_nops(&hdr);
2486 }
2487
2488 /*
2489 * Encode a WRITE request
2490 */
2491 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2492 struct nfs_writeargs *args)
2493 {
2494 struct compound_hdr hdr = {
2495 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496 };
2497
2498 encode_compound_hdr(xdr, req, &hdr);
2499 encode_sequence(xdr, &args->seq_args, &hdr);
2500 encode_putfh(xdr, args->fh, &hdr);
2501 encode_write(xdr, args, &hdr);
2502 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2503 if (args->bitmask)
2504 encode_getfattr(xdr, args->bitmask, &hdr);
2505 encode_nops(&hdr);
2506 }
2507
2508 /*
2509 * a COMMIT request
2510 */
2511 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2512 struct nfs_commitargs *args)
2513 {
2514 struct compound_hdr hdr = {
2515 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516 };
2517
2518 encode_compound_hdr(xdr, req, &hdr);
2519 encode_sequence(xdr, &args->seq_args, &hdr);
2520 encode_putfh(xdr, args->fh, &hdr);
2521 encode_commit(xdr, args, &hdr);
2522 encode_nops(&hdr);
2523 }
2524
2525 /*
2526 * FSINFO request
2527 */
2528 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2529 struct nfs4_fsinfo_arg *args)
2530 {
2531 struct compound_hdr hdr = {
2532 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2533 };
2534
2535 encode_compound_hdr(xdr, req, &hdr);
2536 encode_sequence(xdr, &args->seq_args, &hdr);
2537 encode_putfh(xdr, args->fh, &hdr);
2538 encode_fsinfo(xdr, args->bitmask, &hdr);
2539 encode_nops(&hdr);
2540 }
2541
2542 /*
2543 * a PATHCONF request
2544 */
2545 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2546 const struct nfs4_pathconf_arg *args)
2547 {
2548 struct compound_hdr hdr = {
2549 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2550 };
2551
2552 encode_compound_hdr(xdr, req, &hdr);
2553 encode_sequence(xdr, &args->seq_args, &hdr);
2554 encode_putfh(xdr, args->fh, &hdr);
2555 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2556 &hdr);
2557 encode_nops(&hdr);
2558 }
2559
2560 /*
2561 * a STATFS request
2562 */
2563 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2564 const struct nfs4_statfs_arg *args)
2565 {
2566 struct compound_hdr hdr = {
2567 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2568 };
2569
2570 encode_compound_hdr(xdr, req, &hdr);
2571 encode_sequence(xdr, &args->seq_args, &hdr);
2572 encode_putfh(xdr, args->fh, &hdr);
2573 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2574 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2575 encode_nops(&hdr);
2576 }
2577
2578 /*
2579 * GETATTR_BITMAP request
2580 */
2581 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2582 struct xdr_stream *xdr,
2583 struct nfs4_server_caps_arg *args)
2584 {
2585 struct compound_hdr hdr = {
2586 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2587 };
2588
2589 encode_compound_hdr(xdr, req, &hdr);
2590 encode_sequence(xdr, &args->seq_args, &hdr);
2591 encode_putfh(xdr, args->fhandle, &hdr);
2592 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2593 FATTR4_WORD0_FH_EXPIRE_TYPE|
2594 FATTR4_WORD0_LINK_SUPPORT|
2595 FATTR4_WORD0_SYMLINK_SUPPORT|
2596 FATTR4_WORD0_ACLSUPPORT, &hdr);
2597 encode_nops(&hdr);
2598 }
2599
2600 /*
2601 * a RENEW request
2602 */
2603 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2604 struct nfs_client *clp)
2605 {
2606 struct compound_hdr hdr = {
2607 .nops = 0,
2608 };
2609
2610 encode_compound_hdr(xdr, req, &hdr);
2611 encode_renew(xdr, clp->cl_clientid, &hdr);
2612 encode_nops(&hdr);
2613 }
2614
2615 /*
2616 * a SETCLIENTID request
2617 */
2618 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2619 struct xdr_stream *xdr,
2620 struct nfs4_setclientid *sc)
2621 {
2622 struct compound_hdr hdr = {
2623 .nops = 0,
2624 };
2625
2626 encode_compound_hdr(xdr, req, &hdr);
2627 encode_setclientid(xdr, sc, &hdr);
2628 encode_nops(&hdr);
2629 }
2630
2631 /*
2632 * a SETCLIENTID_CONFIRM request
2633 */
2634 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2635 struct xdr_stream *xdr,
2636 struct nfs4_setclientid_res *arg)
2637 {
2638 struct compound_hdr hdr = {
2639 .nops = 0,
2640 };
2641
2642 encode_compound_hdr(xdr, req, &hdr);
2643 encode_setclientid_confirm(xdr, arg, &hdr);
2644 encode_nops(&hdr);
2645 }
2646
2647 /*
2648 * DELEGRETURN request
2649 */
2650 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2651 struct xdr_stream *xdr,
2652 const struct nfs4_delegreturnargs *args)
2653 {
2654 struct compound_hdr hdr = {
2655 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2656 };
2657
2658 encode_compound_hdr(xdr, req, &hdr);
2659 encode_sequence(xdr, &args->seq_args, &hdr);
2660 encode_putfh(xdr, args->fhandle, &hdr);
2661 encode_getfattr(xdr, args->bitmask, &hdr);
2662 encode_delegreturn(xdr, args->stateid, &hdr);
2663 encode_nops(&hdr);
2664 }
2665
2666 /*
2667 * Encode FS_LOCATIONS request
2668 */
2669 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2670 struct xdr_stream *xdr,
2671 struct nfs4_fs_locations_arg *args)
2672 {
2673 struct compound_hdr hdr = {
2674 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2675 };
2676 uint32_t replen;
2677
2678 encode_compound_hdr(xdr, req, &hdr);
2679 encode_sequence(xdr, &args->seq_args, &hdr);
2680 encode_putfh(xdr, args->dir_fh, &hdr);
2681 encode_lookup(xdr, args->name, &hdr);
2682 replen = hdr.replen; /* get the attribute into args->page */
2683 encode_fs_locations(xdr, args->bitmask, &hdr);
2684
2685 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2686 0, PAGE_SIZE);
2687 encode_nops(&hdr);
2688 }
2689
2690 /*
2691 * Encode SECINFO request
2692 */
2693 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 struct nfs4_secinfo_arg *args)
2696 {
2697 struct compound_hdr hdr = {
2698 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2699 };
2700
2701 encode_compound_hdr(xdr, req, &hdr);
2702 encode_sequence(xdr, &args->seq_args, &hdr);
2703 encode_putfh(xdr, args->dir_fh, &hdr);
2704 encode_secinfo(xdr, args->name, &hdr);
2705 encode_nops(&hdr);
2706 }
2707
2708 #if defined(CONFIG_NFS_V4_1)
2709 /*
2710 * BIND_CONN_TO_SESSION request
2711 */
2712 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2713 struct xdr_stream *xdr,
2714 struct nfs_client *clp)
2715 {
2716 struct compound_hdr hdr = {
2717 .minorversion = clp->cl_mvops->minor_version,
2718 };
2719
2720 encode_compound_hdr(xdr, req, &hdr);
2721 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2722 encode_nops(&hdr);
2723 }
2724
2725 /*
2726 * EXCHANGE_ID request
2727 */
2728 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 struct nfs41_exchange_id_args *args)
2731 {
2732 struct compound_hdr hdr = {
2733 .minorversion = args->client->cl_mvops->minor_version,
2734 };
2735
2736 encode_compound_hdr(xdr, req, &hdr);
2737 encode_exchange_id(xdr, args, &hdr);
2738 encode_nops(&hdr);
2739 }
2740
2741 /*
2742 * a CREATE_SESSION request
2743 */
2744 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2745 struct xdr_stream *xdr,
2746 struct nfs41_create_session_args *args)
2747 {
2748 struct compound_hdr hdr = {
2749 .minorversion = args->client->cl_mvops->minor_version,
2750 };
2751
2752 encode_compound_hdr(xdr, req, &hdr);
2753 encode_create_session(xdr, args, &hdr);
2754 encode_nops(&hdr);
2755 }
2756
2757 /*
2758 * a DESTROY_SESSION request
2759 */
2760 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2761 struct xdr_stream *xdr,
2762 struct nfs4_session *session)
2763 {
2764 struct compound_hdr hdr = {
2765 .minorversion = session->clp->cl_mvops->minor_version,
2766 };
2767
2768 encode_compound_hdr(xdr, req, &hdr);
2769 encode_destroy_session(xdr, session, &hdr);
2770 encode_nops(&hdr);
2771 }
2772
2773 /*
2774 * a DESTROY_CLIENTID request
2775 */
2776 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2777 struct xdr_stream *xdr,
2778 struct nfs_client *clp)
2779 {
2780 struct compound_hdr hdr = {
2781 .minorversion = clp->cl_mvops->minor_version,
2782 };
2783
2784 encode_compound_hdr(xdr, req, &hdr);
2785 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2786 encode_nops(&hdr);
2787 }
2788
2789 /*
2790 * a SEQUENCE request
2791 */
2792 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2793 struct nfs4_sequence_args *args)
2794 {
2795 struct compound_hdr hdr = {
2796 .minorversion = nfs4_xdr_minorversion(args),
2797 };
2798
2799 encode_compound_hdr(xdr, req, &hdr);
2800 encode_sequence(xdr, args, &hdr);
2801 encode_nops(&hdr);
2802 }
2803
2804 /*
2805 * a GET_LEASE_TIME request
2806 */
2807 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2808 struct xdr_stream *xdr,
2809 struct nfs4_get_lease_time_args *args)
2810 {
2811 struct compound_hdr hdr = {
2812 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2813 };
2814 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2815
2816 encode_compound_hdr(xdr, req, &hdr);
2817 encode_sequence(xdr, &args->la_seq_args, &hdr);
2818 encode_putrootfh(xdr, &hdr);
2819 encode_fsinfo(xdr, lease_bitmap, &hdr);
2820 encode_nops(&hdr);
2821 }
2822
2823 /*
2824 * a RECLAIM_COMPLETE request
2825 */
2826 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2827 struct xdr_stream *xdr,
2828 struct nfs41_reclaim_complete_args *args)
2829 {
2830 struct compound_hdr hdr = {
2831 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2832 };
2833
2834 encode_compound_hdr(xdr, req, &hdr);
2835 encode_sequence(xdr, &args->seq_args, &hdr);
2836 encode_reclaim_complete(xdr, args, &hdr);
2837 encode_nops(&hdr);
2838 }
2839
2840 /*
2841 * Encode GETDEVICELIST request
2842 */
2843 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2844 struct xdr_stream *xdr,
2845 struct nfs4_getdevicelist_args *args)
2846 {
2847 struct compound_hdr hdr = {
2848 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849 };
2850
2851 encode_compound_hdr(xdr, req, &hdr);
2852 encode_sequence(xdr, &args->seq_args, &hdr);
2853 encode_putfh(xdr, args->fh, &hdr);
2854 encode_getdevicelist(xdr, args, &hdr);
2855 encode_nops(&hdr);
2856 }
2857
2858 /*
2859 * Encode GETDEVICEINFO request
2860 */
2861 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 struct nfs4_getdeviceinfo_args *args)
2864 {
2865 struct compound_hdr hdr = {
2866 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2867 };
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_sequence(xdr, &args->seq_args, &hdr);
2871 encode_getdeviceinfo(xdr, args, &hdr);
2872
2873 /* set up reply kvec. Subtract notification bitmap max size (2)
2874 * so that notification bitmap is put in xdr_buf tail */
2875 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2876 args->pdev->pages, args->pdev->pgbase,
2877 args->pdev->pglen);
2878
2879 encode_nops(&hdr);
2880 }
2881
2882 /*
2883 * Encode LAYOUTGET request
2884 */
2885 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2886 struct xdr_stream *xdr,
2887 struct nfs4_layoutget_args *args)
2888 {
2889 struct compound_hdr hdr = {
2890 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891 };
2892
2893 encode_compound_hdr(xdr, req, &hdr);
2894 encode_sequence(xdr, &args->seq_args, &hdr);
2895 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2896 encode_layoutget(xdr, args, &hdr);
2897
2898 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2899 args->layout.pages, 0, args->layout.pglen);
2900
2901 encode_nops(&hdr);
2902 }
2903
2904 /*
2905 * Encode LAYOUTCOMMIT request
2906 */
2907 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2908 struct xdr_stream *xdr,
2909 struct nfs4_layoutcommit_args *args)
2910 {
2911 struct nfs4_layoutcommit_data *data =
2912 container_of(args, struct nfs4_layoutcommit_data, args);
2913 struct compound_hdr hdr = {
2914 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915 };
2916
2917 encode_compound_hdr(xdr, req, &hdr);
2918 encode_sequence(xdr, &args->seq_args, &hdr);
2919 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2920 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2921 encode_getfattr(xdr, args->bitmask, &hdr);
2922 encode_nops(&hdr);
2923 }
2924
2925 /*
2926 * Encode LAYOUTRETURN request
2927 */
2928 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2929 struct xdr_stream *xdr,
2930 struct nfs4_layoutreturn_args *args)
2931 {
2932 struct compound_hdr hdr = {
2933 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934 };
2935
2936 encode_compound_hdr(xdr, req, &hdr);
2937 encode_sequence(xdr, &args->seq_args, &hdr);
2938 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939 encode_layoutreturn(xdr, args, &hdr);
2940 encode_nops(&hdr);
2941 }
2942
2943 /*
2944 * Encode SECINFO_NO_NAME request
2945 */
2946 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2947 struct xdr_stream *xdr,
2948 struct nfs41_secinfo_no_name_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_putrootfh(xdr, &hdr);
2957 encode_secinfo_no_name(xdr, args, &hdr);
2958 encode_nops(&hdr);
2959 return 0;
2960 }
2961
2962 /*
2963 * Encode TEST_STATEID request
2964 */
2965 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2966 struct xdr_stream *xdr,
2967 struct nfs41_test_stateid_args *args)
2968 {
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971 };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->seq_args, &hdr);
2975 encode_test_stateid(xdr, args, &hdr);
2976 encode_nops(&hdr);
2977 }
2978
2979 /*
2980 * Encode FREE_STATEID request
2981 */
2982 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2983 struct xdr_stream *xdr,
2984 struct nfs41_free_stateid_args *args)
2985 {
2986 struct compound_hdr hdr = {
2987 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988 };
2989
2990 encode_compound_hdr(xdr, req, &hdr);
2991 encode_sequence(xdr, &args->seq_args, &hdr);
2992 encode_free_stateid(xdr, args, &hdr);
2993 encode_nops(&hdr);
2994 }
2995 #endif /* CONFIG_NFS_V4_1 */
2996
2997 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2998 {
2999 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3000 "Remaining buffer length is %tu words.\n",
3001 func, xdr->end - xdr->p);
3002 }
3003
3004 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3005 {
3006 __be32 *p;
3007
3008 p = xdr_inline_decode(xdr, 4);
3009 if (unlikely(!p))
3010 goto out_overflow;
3011 *len = be32_to_cpup(p);
3012 p = xdr_inline_decode(xdr, *len);
3013 if (unlikely(!p))
3014 goto out_overflow;
3015 *string = (char *)p;
3016 return 0;
3017 out_overflow:
3018 print_overflow_msg(__func__, xdr);
3019 return -EIO;
3020 }
3021
3022 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3023 {
3024 __be32 *p;
3025
3026 p = xdr_inline_decode(xdr, 8);
3027 if (unlikely(!p))
3028 goto out_overflow;
3029 hdr->status = be32_to_cpup(p++);
3030 hdr->taglen = be32_to_cpup(p);
3031
3032 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3033 if (unlikely(!p))
3034 goto out_overflow;
3035 hdr->tag = (char *)p;
3036 p += XDR_QUADLEN(hdr->taglen);
3037 hdr->nops = be32_to_cpup(p);
3038 if (unlikely(hdr->nops < 1))
3039 return nfs4_stat_to_errno(hdr->status);
3040 return 0;
3041 out_overflow:
3042 print_overflow_msg(__func__, xdr);
3043 return -EIO;
3044 }
3045
3046 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3047 {
3048 __be32 *p;
3049 uint32_t opnum;
3050 int32_t nfserr;
3051
3052 p = xdr_inline_decode(xdr, 8);
3053 if (unlikely(!p))
3054 goto out_overflow;
3055 opnum = be32_to_cpup(p++);
3056 if (opnum != expected) {
3057 dprintk("nfs: Server returned operation"
3058 " %d but we issued a request for %d\n",
3059 opnum, expected);
3060 return -EIO;
3061 }
3062 nfserr = be32_to_cpup(p);
3063 if (nfserr != NFS_OK)
3064 return nfs4_stat_to_errno(nfserr);
3065 return 0;
3066 out_overflow:
3067 print_overflow_msg(__func__, xdr);
3068 return -EIO;
3069 }
3070
3071 /* Dummy routine */
3072 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3073 {
3074 __be32 *p;
3075 unsigned int strlen;
3076 char *str;
3077
3078 p = xdr_inline_decode(xdr, 12);
3079 if (likely(p))
3080 return decode_opaque_inline(xdr, &strlen, &str);
3081 print_overflow_msg(__func__, xdr);
3082 return -EIO;
3083 }
3084
3085 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3086 {
3087 uint32_t bmlen;
3088 __be32 *p;
3089
3090 p = xdr_inline_decode(xdr, 4);
3091 if (unlikely(!p))
3092 goto out_overflow;
3093 bmlen = be32_to_cpup(p);
3094
3095 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3096 p = xdr_inline_decode(xdr, (bmlen << 2));
3097 if (unlikely(!p))
3098 goto out_overflow;
3099 if (bmlen > 0) {
3100 bitmap[0] = be32_to_cpup(p++);
3101 if (bmlen > 1) {
3102 bitmap[1] = be32_to_cpup(p++);
3103 if (bmlen > 2)
3104 bitmap[2] = be32_to_cpup(p);
3105 }
3106 }
3107 return 0;
3108 out_overflow:
3109 print_overflow_msg(__func__, xdr);
3110 return -EIO;
3111 }
3112
3113 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3114 {
3115 __be32 *p;
3116
3117 p = xdr_inline_decode(xdr, 4);
3118 if (unlikely(!p))
3119 goto out_overflow;
3120 *attrlen = be32_to_cpup(p);
3121 *savep = xdr_stream_pos(xdr);
3122 return 0;
3123 out_overflow:
3124 print_overflow_msg(__func__, xdr);
3125 return -EIO;
3126 }
3127
3128 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3129 {
3130 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3131 int ret;
3132 ret = decode_attr_bitmap(xdr, bitmask);
3133 if (unlikely(ret < 0))
3134 return ret;
3135 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3136 } else
3137 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3138 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3139 bitmask[0], bitmask[1], bitmask[2]);
3140 return 0;
3141 }
3142
3143 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3144 {
3145 __be32 *p;
3146 int ret = 0;
3147
3148 *type = 0;
3149 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3150 return -EIO;
3151 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3152 p = xdr_inline_decode(xdr, 4);
3153 if (unlikely(!p))
3154 goto out_overflow;
3155 *type = be32_to_cpup(p);
3156 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3157 dprintk("%s: bad type %d\n", __func__, *type);
3158 return -EIO;
3159 }
3160 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3161 ret = NFS_ATTR_FATTR_TYPE;
3162 }
3163 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3164 return ret;
3165 out_overflow:
3166 print_overflow_msg(__func__, xdr);
3167 return -EIO;
3168 }
3169
3170 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3171 uint32_t *bitmap, uint32_t *type)
3172 {
3173 __be32 *p;
3174
3175 *type = 0;
3176 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3177 return -EIO;
3178 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3179 p = xdr_inline_decode(xdr, 4);
3180 if (unlikely(!p))
3181 goto out_overflow;
3182 *type = be32_to_cpup(p);
3183 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3184 }
3185 dprintk("%s: expire type=0x%x\n", __func__, *type);
3186 return 0;
3187 out_overflow:
3188 print_overflow_msg(__func__, xdr);
3189 return -EIO;
3190 }
3191
3192 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3193 {
3194 __be32 *p;
3195 int ret = 0;
3196
3197 *change = 0;
3198 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3199 return -EIO;
3200 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3201 p = xdr_inline_decode(xdr, 8);
3202 if (unlikely(!p))
3203 goto out_overflow;
3204 xdr_decode_hyper(p, change);
3205 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3206 ret = NFS_ATTR_FATTR_CHANGE;
3207 }
3208 dprintk("%s: change attribute=%Lu\n", __func__,
3209 (unsigned long long)*change);
3210 return ret;
3211 out_overflow:
3212 print_overflow_msg(__func__, xdr);
3213 return -EIO;
3214 }
3215
3216 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3217 {
3218 __be32 *p;
3219 int ret = 0;
3220
3221 *size = 0;
3222 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3223 return -EIO;
3224 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3225 p = xdr_inline_decode(xdr, 8);
3226 if (unlikely(!p))
3227 goto out_overflow;
3228 xdr_decode_hyper(p, size);
3229 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3230 ret = NFS_ATTR_FATTR_SIZE;
3231 }
3232 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3233 return ret;
3234 out_overflow:
3235 print_overflow_msg(__func__, xdr);
3236 return -EIO;
3237 }
3238
3239 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3240 {
3241 __be32 *p;
3242
3243 *res = 0;
3244 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3245 return -EIO;
3246 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3247 p = xdr_inline_decode(xdr, 4);
3248 if (unlikely(!p))
3249 goto out_overflow;
3250 *res = be32_to_cpup(p);
3251 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3252 }
3253 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3254 return 0;
3255 out_overflow:
3256 print_overflow_msg(__func__, xdr);
3257 return -EIO;
3258 }
3259
3260 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3261 {
3262 __be32 *p;
3263
3264 *res = 0;
3265 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3266 return -EIO;
3267 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3268 p = xdr_inline_decode(xdr, 4);
3269 if (unlikely(!p))
3270 goto out_overflow;
3271 *res = be32_to_cpup(p);
3272 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3273 }
3274 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3275 return 0;
3276 out_overflow:
3277 print_overflow_msg(__func__, xdr);
3278 return -EIO;
3279 }
3280
3281 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3282 {
3283 __be32 *p;
3284 int ret = 0;
3285
3286 fsid->major = 0;
3287 fsid->minor = 0;
3288 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3289 return -EIO;
3290 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3291 p = xdr_inline_decode(xdr, 16);
3292 if (unlikely(!p))
3293 goto out_overflow;
3294 p = xdr_decode_hyper(p, &fsid->major);
3295 xdr_decode_hyper(p, &fsid->minor);
3296 bitmap[0] &= ~FATTR4_WORD0_FSID;
3297 ret = NFS_ATTR_FATTR_FSID;
3298 }
3299 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3300 (unsigned long long)fsid->major,
3301 (unsigned long long)fsid->minor);
3302 return ret;
3303 out_overflow:
3304 print_overflow_msg(__func__, xdr);
3305 return -EIO;
3306 }
3307
3308 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3309 {
3310 __be32 *p;
3311
3312 *res = 60;
3313 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3314 return -EIO;
3315 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3316 p = xdr_inline_decode(xdr, 4);
3317 if (unlikely(!p))
3318 goto out_overflow;
3319 *res = be32_to_cpup(p);
3320 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3321 }
3322 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3323 return 0;
3324 out_overflow:
3325 print_overflow_msg(__func__, xdr);
3326 return -EIO;
3327 }
3328
3329 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3330 {
3331 __be32 *p;
3332
3333 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3334 return -EIO;
3335 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3336 p = xdr_inline_decode(xdr, 4);
3337 if (unlikely(!p))
3338 goto out_overflow;
3339 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3340 *res = -be32_to_cpup(p);
3341 }
3342 return 0;
3343 out_overflow:
3344 print_overflow_msg(__func__, xdr);
3345 return -EIO;
3346 }
3347
3348 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3349 {
3350 __be32 *p;
3351 int len;
3352
3353 if (fh != NULL)
3354 memset(fh, 0, sizeof(*fh));
3355
3356 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3357 return -EIO;
3358 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3359 p = xdr_inline_decode(xdr, 4);
3360 if (unlikely(!p))
3361 goto out_overflow;
3362 len = be32_to_cpup(p);
3363 if (len > NFS4_FHSIZE)
3364 return -EIO;
3365 p = xdr_inline_decode(xdr, len);
3366 if (unlikely(!p))
3367 goto out_overflow;
3368 if (fh != NULL) {
3369 memcpy(fh->data, p, len);
3370 fh->size = len;
3371 }
3372 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3373 }
3374 return 0;
3375 out_overflow:
3376 print_overflow_msg(__func__, xdr);
3377 return -EIO;
3378 }
3379
3380 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381 {
3382 __be32 *p;
3383
3384 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3385 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3386 return -EIO;
3387 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3388 p = xdr_inline_decode(xdr, 4);
3389 if (unlikely(!p))
3390 goto out_overflow;
3391 *res = be32_to_cpup(p);
3392 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3393 }
3394 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3395 return 0;
3396 out_overflow:
3397 print_overflow_msg(__func__, xdr);
3398 return -EIO;
3399 }
3400
3401 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3402 {
3403 __be32 *p;
3404 int ret = 0;
3405
3406 *fileid = 0;
3407 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3408 return -EIO;
3409 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3410 p = xdr_inline_decode(xdr, 8);
3411 if (unlikely(!p))
3412 goto out_overflow;
3413 xdr_decode_hyper(p, fileid);
3414 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3415 ret = NFS_ATTR_FATTR_FILEID;
3416 }
3417 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3418 return ret;
3419 out_overflow:
3420 print_overflow_msg(__func__, xdr);
3421 return -EIO;
3422 }
3423
3424 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3425 {
3426 __be32 *p;
3427 int ret = 0;
3428
3429 *fileid = 0;
3430 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3431 return -EIO;
3432 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3433 p = xdr_inline_decode(xdr, 8);
3434 if (unlikely(!p))
3435 goto out_overflow;
3436 xdr_decode_hyper(p, fileid);
3437 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3438 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3439 }
3440 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3441 return ret;
3442 out_overflow:
3443 print_overflow_msg(__func__, xdr);
3444 return -EIO;
3445 }
3446
3447 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3448 {
3449 __be32 *p;
3450 int status = 0;
3451
3452 *res = 0;
3453 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3454 return -EIO;
3455 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3456 p = xdr_inline_decode(xdr, 8);
3457 if (unlikely(!p))
3458 goto out_overflow;
3459 xdr_decode_hyper(p, res);
3460 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3461 }
3462 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3463 return status;
3464 out_overflow:
3465 print_overflow_msg(__func__, xdr);
3466 return -EIO;
3467 }
3468
3469 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3470 {
3471 __be32 *p;
3472 int status = 0;
3473
3474 *res = 0;
3475 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3476 return -EIO;
3477 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3478 p = xdr_inline_decode(xdr, 8);
3479 if (unlikely(!p))
3480 goto out_overflow;
3481 xdr_decode_hyper(p, res);
3482 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3483 }
3484 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3485 return status;
3486 out_overflow:
3487 print_overflow_msg(__func__, xdr);
3488 return -EIO;
3489 }
3490
3491 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3492 {
3493 __be32 *p;
3494 int status = 0;
3495
3496 *res = 0;
3497 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3498 return -EIO;
3499 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3500 p = xdr_inline_decode(xdr, 8);
3501 if (unlikely(!p))
3502 goto out_overflow;
3503 xdr_decode_hyper(p, res);
3504 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3505 }
3506 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3507 return status;
3508 out_overflow:
3509 print_overflow_msg(__func__, xdr);
3510 return -EIO;
3511 }
3512
3513 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3514 {
3515 u32 n;
3516 __be32 *p;
3517 int status = 0;
3518
3519 p = xdr_inline_decode(xdr, 4);
3520 if (unlikely(!p))
3521 goto out_overflow;
3522 n = be32_to_cpup(p);
3523 if (n == 0)
3524 goto root_path;
3525 dprintk("pathname4: ");
3526 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3527 dprintk("cannot parse %d components in path\n", n);
3528 goto out_eio;
3529 }
3530 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3531 struct nfs4_string *component = &path->components[path->ncomponents];
3532 status = decode_opaque_inline(xdr, &component->len, &component->data);
3533 if (unlikely(status != 0))
3534 goto out_eio;
3535 ifdebug (XDR)
3536 pr_cont("%s%.*s ",
3537 (path->ncomponents != n ? "/ " : ""),
3538 component->len, component->data);
3539 }
3540 out:
3541 return status;
3542 root_path:
3543 /* a root pathname is sent as a zero component4 */
3544 path->ncomponents = 1;
3545 path->components[0].len=0;
3546 path->components[0].data=NULL;
3547 dprintk("pathname4: /\n");
3548 goto out;
3549 out_eio:
3550 dprintk(" status %d", status);
3551 status = -EIO;
3552 goto out;
3553 out_overflow:
3554 print_overflow_msg(__func__, xdr);
3555 return -EIO;
3556 }
3557
3558 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3559 {
3560 int n;
3561 __be32 *p;
3562 int status = -EIO;
3563
3564 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3565 goto out;
3566 status = 0;
3567 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3568 goto out;
3569 status = -EIO;
3570 /* Ignore borken servers that return unrequested attrs */
3571 if (unlikely(res == NULL))
3572 goto out;
3573 dprintk("%s: fsroot:\n", __func__);
3574 status = decode_pathname(xdr, &res->fs_path);
3575 if (unlikely(status != 0))
3576 goto out;
3577 p = xdr_inline_decode(xdr, 4);
3578 if (unlikely(!p))
3579 goto out_overflow;
3580 n = be32_to_cpup(p);
3581 if (n <= 0)
3582 goto out_eio;
3583 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3584 u32 m;
3585 struct nfs4_fs_location *loc;
3586
3587 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3588 break;
3589 loc = &res->locations[res->nlocations];
3590 p = xdr_inline_decode(xdr, 4);
3591 if (unlikely(!p))
3592 goto out_overflow;
3593 m = be32_to_cpup(p);
3594
3595 dprintk("%s: servers:\n", __func__);
3596 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3597 struct nfs4_string *server;
3598
3599 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3600 unsigned int i;
3601 dprintk("%s: using first %u of %u servers "
3602 "returned for location %u\n",
3603 __func__,
3604 NFS4_FS_LOCATION_MAXSERVERS,
3605 m, res->nlocations);
3606 for (i = loc->nservers; i < m; i++) {
3607 unsigned int len;
3608 char *data;
3609 status = decode_opaque_inline(xdr, &len, &data);
3610 if (unlikely(status != 0))
3611 goto out_eio;
3612 }
3613 break;
3614 }
3615 server = &loc->servers[loc->nservers];
3616 status = decode_opaque_inline(xdr, &server->len, &server->data);
3617 if (unlikely(status != 0))
3618 goto out_eio;
3619 dprintk("%s ", server->data);
3620 }
3621 status = decode_pathname(xdr, &loc->rootpath);
3622 if (unlikely(status != 0))
3623 goto out_eio;
3624 }
3625 if (res->nlocations != 0)
3626 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3627 out:
3628 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3629 return status;
3630 out_overflow:
3631 print_overflow_msg(__func__, xdr);
3632 out_eio:
3633 status = -EIO;
3634 goto out;
3635 }
3636
3637 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639 __be32 *p;
3640 int status = 0;
3641
3642 *res = 0;
3643 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3644 return -EIO;
3645 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3646 p = xdr_inline_decode(xdr, 8);
3647 if (unlikely(!p))
3648 goto out_overflow;
3649 xdr_decode_hyper(p, res);
3650 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3651 }
3652 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3653 return status;
3654 out_overflow:
3655 print_overflow_msg(__func__, xdr);
3656 return -EIO;
3657 }
3658
3659 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3660 {
3661 __be32 *p;
3662 int status = 0;
3663
3664 *maxlink = 1;
3665 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3666 return -EIO;
3667 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3668 p = xdr_inline_decode(xdr, 4);
3669 if (unlikely(!p))
3670 goto out_overflow;
3671 *maxlink = be32_to_cpup(p);
3672 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3673 }
3674 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3675 return status;
3676 out_overflow:
3677 print_overflow_msg(__func__, xdr);
3678 return -EIO;
3679 }
3680
3681 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3682 {
3683 __be32 *p;
3684 int status = 0;
3685
3686 *maxname = 1024;
3687 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3688 return -EIO;
3689 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3690 p = xdr_inline_decode(xdr, 4);
3691 if (unlikely(!p))
3692 goto out_overflow;
3693 *maxname = be32_to_cpup(p);
3694 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3695 }
3696 dprintk("%s: maxname=%u\n", __func__, *maxname);
3697 return status;
3698 out_overflow:
3699 print_overflow_msg(__func__, xdr);
3700 return -EIO;
3701 }
3702
3703 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3704 {
3705 __be32 *p;
3706 int status = 0;
3707
3708 *res = 1024;
3709 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3710 return -EIO;
3711 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3712 uint64_t maxread;
3713 p = xdr_inline_decode(xdr, 8);
3714 if (unlikely(!p))
3715 goto out_overflow;
3716 xdr_decode_hyper(p, &maxread);
3717 if (maxread > 0x7FFFFFFF)
3718 maxread = 0x7FFFFFFF;
3719 *res = (uint32_t)maxread;
3720 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3721 }
3722 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3723 return status;
3724 out_overflow:
3725 print_overflow_msg(__func__, xdr);
3726 return -EIO;
3727 }
3728
3729 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3730 {
3731 __be32 *p;
3732 int status = 0;
3733
3734 *res = 1024;
3735 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3736 return -EIO;
3737 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3738 uint64_t maxwrite;
3739 p = xdr_inline_decode(xdr, 8);
3740 if (unlikely(!p))
3741 goto out_overflow;
3742 xdr_decode_hyper(p, &maxwrite);
3743 if (maxwrite > 0x7FFFFFFF)
3744 maxwrite = 0x7FFFFFFF;
3745 *res = (uint32_t)maxwrite;
3746 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3747 }
3748 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3749 return status;
3750 out_overflow:
3751 print_overflow_msg(__func__, xdr);
3752 return -EIO;
3753 }
3754
3755 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3756 {
3757 uint32_t tmp;
3758 __be32 *p;
3759 int ret = 0;
3760
3761 *mode = 0;
3762 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3763 return -EIO;
3764 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3765 p = xdr_inline_decode(xdr, 4);
3766 if (unlikely(!p))
3767 goto out_overflow;
3768 tmp = be32_to_cpup(p);
3769 *mode = tmp & ~S_IFMT;
3770 bitmap[1] &= ~FATTR4_WORD1_MODE;
3771 ret = NFS_ATTR_FATTR_MODE;
3772 }
3773 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3774 return ret;
3775 out_overflow:
3776 print_overflow_msg(__func__, xdr);
3777 return -EIO;
3778 }
3779
3780 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3781 {
3782 __be32 *p;
3783 int ret = 0;
3784
3785 *nlink = 1;
3786 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3787 return -EIO;
3788 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3789 p = xdr_inline_decode(xdr, 4);
3790 if (unlikely(!p))
3791 goto out_overflow;
3792 *nlink = be32_to_cpup(p);
3793 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3794 ret = NFS_ATTR_FATTR_NLINK;
3795 }
3796 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3797 return ret;
3798 out_overflow:
3799 print_overflow_msg(__func__, xdr);
3800 return -EIO;
3801 }
3802
3803 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3804 const struct nfs_server *server, kuid_t *uid,
3805 struct nfs4_string *owner_name)
3806 {
3807 uint32_t len;
3808 __be32 *p;
3809 int ret = 0;
3810
3811 *uid = make_kuid(&init_user_ns, -2);
3812 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3813 return -EIO;
3814 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3815 p = xdr_inline_decode(xdr, 4);
3816 if (unlikely(!p))
3817 goto out_overflow;
3818 len = be32_to_cpup(p);
3819 p = xdr_inline_decode(xdr, len);
3820 if (unlikely(!p))
3821 goto out_overflow;
3822 if (owner_name != NULL) {
3823 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3824 if (owner_name->data != NULL) {
3825 owner_name->len = len;
3826 ret = NFS_ATTR_FATTR_OWNER_NAME;
3827 }
3828 } else if (len < XDR_MAX_NETOBJ) {
3829 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3830 ret = NFS_ATTR_FATTR_OWNER;
3831 else
3832 dprintk("%s: nfs_map_name_to_uid failed!\n",
3833 __func__);
3834 } else
3835 dprintk("%s: name too long (%u)!\n",
3836 __func__, len);
3837 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3838 }
3839 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3840 return ret;
3841 out_overflow:
3842 print_overflow_msg(__func__, xdr);
3843 return -EIO;
3844 }
3845
3846 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3847 const struct nfs_server *server, kgid_t *gid,
3848 struct nfs4_string *group_name)
3849 {
3850 uint32_t len;
3851 __be32 *p;
3852 int ret = 0;
3853
3854 *gid = make_kgid(&init_user_ns, -2);
3855 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3856 return -EIO;
3857 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3858 p = xdr_inline_decode(xdr, 4);
3859 if (unlikely(!p))
3860 goto out_overflow;
3861 len = be32_to_cpup(p);
3862 p = xdr_inline_decode(xdr, len);
3863 if (unlikely(!p))
3864 goto out_overflow;
3865 if (group_name != NULL) {
3866 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3867 if (group_name->data != NULL) {
3868 group_name->len = len;
3869 ret = NFS_ATTR_FATTR_GROUP_NAME;
3870 }
3871 } else if (len < XDR_MAX_NETOBJ) {
3872 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3873 ret = NFS_ATTR_FATTR_GROUP;
3874 else
3875 dprintk("%s: nfs_map_group_to_gid failed!\n",
3876 __func__);
3877 } else
3878 dprintk("%s: name too long (%u)!\n",
3879 __func__, len);
3880 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3881 }
3882 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3883 return ret;
3884 out_overflow:
3885 print_overflow_msg(__func__, xdr);
3886 return -EIO;
3887 }
3888
3889 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3890 {
3891 uint32_t major = 0, minor = 0;
3892 __be32 *p;
3893 int ret = 0;
3894
3895 *rdev = MKDEV(0,0);
3896 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3897 return -EIO;
3898 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3899 dev_t tmp;
3900
3901 p = xdr_inline_decode(xdr, 8);
3902 if (unlikely(!p))
3903 goto out_overflow;
3904 major = be32_to_cpup(p++);
3905 minor = be32_to_cpup(p);
3906 tmp = MKDEV(major, minor);
3907 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3908 *rdev = tmp;
3909 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3910 ret = NFS_ATTR_FATTR_RDEV;
3911 }
3912 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3913 return ret;
3914 out_overflow:
3915 print_overflow_msg(__func__, xdr);
3916 return -EIO;
3917 }
3918
3919 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3920 {
3921 __be32 *p;
3922 int status = 0;
3923
3924 *res = 0;
3925 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3926 return -EIO;
3927 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3928 p = xdr_inline_decode(xdr, 8);
3929 if (unlikely(!p))
3930 goto out_overflow;
3931 xdr_decode_hyper(p, res);
3932 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3933 }
3934 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3935 return status;
3936 out_overflow:
3937 print_overflow_msg(__func__, xdr);
3938 return -EIO;
3939 }
3940
3941 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3942 {
3943 __be32 *p;
3944 int status = 0;
3945
3946 *res = 0;
3947 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3948 return -EIO;
3949 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3950 p = xdr_inline_decode(xdr, 8);
3951 if (unlikely(!p))
3952 goto out_overflow;
3953 xdr_decode_hyper(p, res);
3954 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3955 }
3956 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3957 return status;
3958 out_overflow:
3959 print_overflow_msg(__func__, xdr);
3960 return -EIO;
3961 }
3962
3963 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3964 {
3965 __be32 *p;
3966 int status = 0;
3967
3968 *res = 0;
3969 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3970 return -EIO;
3971 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3972 p = xdr_inline_decode(xdr, 8);
3973 if (unlikely(!p))
3974 goto out_overflow;
3975 xdr_decode_hyper(p, res);
3976 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3977 }
3978 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3979 return status;
3980 out_overflow:
3981 print_overflow_msg(__func__, xdr);
3982 return -EIO;
3983 }
3984
3985 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3986 {
3987 __be32 *p;
3988 int ret = 0;
3989
3990 *used = 0;
3991 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3992 return -EIO;
3993 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3994 p = xdr_inline_decode(xdr, 8);
3995 if (unlikely(!p))
3996 goto out_overflow;
3997 xdr_decode_hyper(p, used);
3998 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3999 ret = NFS_ATTR_FATTR_SPACE_USED;
4000 }
4001 dprintk("%s: space used=%Lu\n", __func__,
4002 (unsigned long long)*used);
4003 return ret;
4004 out_overflow:
4005 print_overflow_msg(__func__, xdr);
4006 return -EIO;
4007 }
4008
4009 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4010 {
4011 __be32 *p;
4012 uint64_t sec;
4013 uint32_t nsec;
4014
4015 p = xdr_inline_decode(xdr, 12);
4016 if (unlikely(!p))
4017 goto out_overflow;
4018 p = xdr_decode_hyper(p, &sec);
4019 nsec = be32_to_cpup(p);
4020 time->tv_sec = (time_t)sec;
4021 time->tv_nsec = (long)nsec;
4022 return 0;
4023 out_overflow:
4024 print_overflow_msg(__func__, xdr);
4025 return -EIO;
4026 }
4027
4028 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4029 {
4030 int status = 0;
4031
4032 time->tv_sec = 0;
4033 time->tv_nsec = 0;
4034 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4035 return -EIO;
4036 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4037 status = decode_attr_time(xdr, time);
4038 if (status == 0)
4039 status = NFS_ATTR_FATTR_ATIME;
4040 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4041 }
4042 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4043 return status;
4044 }
4045
4046 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4047 {
4048 int status = 0;
4049
4050 time->tv_sec = 0;
4051 time->tv_nsec = 0;
4052 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4053 return -EIO;
4054 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4055 status = decode_attr_time(xdr, time);
4056 if (status == 0)
4057 status = NFS_ATTR_FATTR_CTIME;
4058 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4059 }
4060 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4061 return status;
4062 }
4063
4064 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4065 struct timespec *time)
4066 {
4067 int status = 0;
4068
4069 time->tv_sec = 0;
4070 time->tv_nsec = 0;
4071 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4072 return -EIO;
4073 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4074 status = decode_attr_time(xdr, time);
4075 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4076 }
4077 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4078 (long)time->tv_nsec);
4079 return status;
4080 }
4081
4082 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4083 struct nfs4_label *label)
4084 {
4085 uint32_t pi = 0;
4086 uint32_t lfs = 0;
4087 __u32 len;
4088 __be32 *p;
4089 int status = 0;
4090
4091 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4092 return -EIO;
4093 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4094 p = xdr_inline_decode(xdr, 4);
4095 if (unlikely(!p))
4096 goto out_overflow;
4097 lfs = be32_to_cpup(p++);
4098 p = xdr_inline_decode(xdr, 4);
4099 if (unlikely(!p))
4100 goto out_overflow;
4101 pi = be32_to_cpup(p++);
4102 p = xdr_inline_decode(xdr, 4);
4103 if (unlikely(!p))
4104 goto out_overflow;
4105 len = be32_to_cpup(p++);
4106 p = xdr_inline_decode(xdr, len);
4107 if (unlikely(!p))
4108 goto out_overflow;
4109 if (len < NFS4_MAXLABELLEN) {
4110 if (label) {
4111 memcpy(label->label, p, len);
4112 label->len = len;
4113 label->pi = pi;
4114 label->lfs = lfs;
4115 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4116 }
4117 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4118 } else
4119 printk(KERN_WARNING "%s: label too long (%u)!\n",
4120 __func__, len);
4121 }
4122 if (label && label->label)
4123 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4124 (char *)label->label, label->len, label->pi, label->lfs);
4125 return status;
4126
4127 out_overflow:
4128 print_overflow_msg(__func__, xdr);
4129 return -EIO;
4130 }
4131
4132 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4133 {
4134 int status = 0;
4135
4136 time->tv_sec = 0;
4137 time->tv_nsec = 0;
4138 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4139 return -EIO;
4140 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4141 status = decode_attr_time(xdr, time);
4142 if (status == 0)
4143 status = NFS_ATTR_FATTR_MTIME;
4144 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4145 }
4146 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4147 return status;
4148 }
4149
4150 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4151 {
4152 unsigned int attrwords = XDR_QUADLEN(attrlen);
4153 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4154
4155 if (unlikely(attrwords != nwords)) {
4156 dprintk("%s: server returned incorrect attribute length: "
4157 "%u %c %u\n",
4158 __func__,
4159 attrwords << 2,
4160 (attrwords < nwords) ? '<' : '>',
4161 nwords << 2);
4162 return -EIO;
4163 }
4164 return 0;
4165 }
4166
4167 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4168 {
4169 __be32 *p;
4170
4171 p = xdr_inline_decode(xdr, 20);
4172 if (unlikely(!p))
4173 goto out_overflow;
4174 cinfo->atomic = be32_to_cpup(p++);
4175 p = xdr_decode_hyper(p, &cinfo->before);
4176 xdr_decode_hyper(p, &cinfo->after);
4177 return 0;
4178 out_overflow:
4179 print_overflow_msg(__func__, xdr);
4180 return -EIO;
4181 }
4182
4183 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4184 {
4185 __be32 *p;
4186 uint32_t supp, acc;
4187 int status;
4188
4189 status = decode_op_hdr(xdr, OP_ACCESS);
4190 if (status)
4191 return status;
4192 p = xdr_inline_decode(xdr, 8);
4193 if (unlikely(!p))
4194 goto out_overflow;
4195 supp = be32_to_cpup(p++);
4196 acc = be32_to_cpup(p);
4197 *supported = supp;
4198 *access = acc;
4199 return 0;
4200 out_overflow:
4201 print_overflow_msg(__func__, xdr);
4202 return -EIO;
4203 }
4204
4205 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4206 {
4207 __be32 *p;
4208
4209 p = xdr_inline_decode(xdr, len);
4210 if (likely(p)) {
4211 memcpy(buf, p, len);
4212 return 0;
4213 }
4214 print_overflow_msg(__func__, xdr);
4215 return -EIO;
4216 }
4217
4218 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4219 {
4220 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4221 }
4222
4223 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4224 {
4225 int status;
4226
4227 status = decode_op_hdr(xdr, OP_CLOSE);
4228 if (status != -EIO)
4229 nfs_increment_open_seqid(status, res->seqid);
4230 if (!status)
4231 status = decode_stateid(xdr, &res->stateid);
4232 return status;
4233 }
4234
4235 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4236 {
4237 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4238 }
4239
4240 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4241 {
4242 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4243 }
4244
4245 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4246 {
4247 int status;
4248
4249 status = decode_op_hdr(xdr, OP_COMMIT);
4250 if (!status)
4251 status = decode_write_verifier(xdr, &res->verf->verifier);
4252 return status;
4253 }
4254
4255 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4256 {
4257 __be32 *p;
4258 uint32_t bmlen;
4259 int status;
4260
4261 status = decode_op_hdr(xdr, OP_CREATE);
4262 if (status)
4263 return status;
4264 if ((status = decode_change_info(xdr, cinfo)))
4265 return status;
4266 p = xdr_inline_decode(xdr, 4);
4267 if (unlikely(!p))
4268 goto out_overflow;
4269 bmlen = be32_to_cpup(p);
4270 p = xdr_inline_decode(xdr, bmlen << 2);
4271 if (likely(p))
4272 return 0;
4273 out_overflow:
4274 print_overflow_msg(__func__, xdr);
4275 return -EIO;
4276 }
4277
4278 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4279 {
4280 unsigned int savep;
4281 uint32_t attrlen, bitmap[3] = {0};
4282 int status;
4283
4284 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4285 goto xdr_error;
4286 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4287 goto xdr_error;
4288 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4289 goto xdr_error;
4290 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4291 goto xdr_error;
4292 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4293 &res->fh_expire_type)) != 0)
4294 goto xdr_error;
4295 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4296 goto xdr_error;
4297 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4298 goto xdr_error;
4299 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4300 goto xdr_error;
4301 status = verify_attr_len(xdr, savep, attrlen);
4302 xdr_error:
4303 dprintk("%s: xdr returned %d!\n", __func__, -status);
4304 return status;
4305 }
4306
4307 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4308 {
4309 unsigned int savep;
4310 uint32_t attrlen, bitmap[3] = {0};
4311 int status;
4312
4313 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4314 goto xdr_error;
4315 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4316 goto xdr_error;
4317 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4318 goto xdr_error;
4319
4320 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4321 goto xdr_error;
4322 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4323 goto xdr_error;
4324 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4325 goto xdr_error;
4326 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4327 goto xdr_error;
4328 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4329 goto xdr_error;
4330 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4331 goto xdr_error;
4332
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_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
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_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4353 goto xdr_error;
4354 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4355 goto xdr_error;
4356
4357 status = verify_attr_len(xdr, savep, attrlen);
4358 xdr_error:
4359 dprintk("%s: xdr returned %d!\n", __func__, -status);
4360 return status;
4361 }
4362
4363 static int decode_threshold_hint(struct xdr_stream *xdr,
4364 uint32_t *bitmap,
4365 uint64_t *res,
4366 uint32_t hint_bit)
4367 {
4368 __be32 *p;
4369
4370 *res = 0;
4371 if (likely(bitmap[0] & hint_bit)) {
4372 p = xdr_inline_decode(xdr, 8);
4373 if (unlikely(!p))
4374 goto out_overflow;
4375 xdr_decode_hyper(p, res);
4376 }
4377 return 0;
4378 out_overflow:
4379 print_overflow_msg(__func__, xdr);
4380 return -EIO;
4381 }
4382
4383 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4384 struct nfs4_threshold *res)
4385 {
4386 __be32 *p;
4387 unsigned int savep;
4388 uint32_t bitmap[3] = {0,}, attrlen;
4389 int status;
4390
4391 /* layout type */
4392 p = xdr_inline_decode(xdr, 4);
4393 if (unlikely(!p)) {
4394 print_overflow_msg(__func__, xdr);
4395 return -EIO;
4396 }
4397 res->l_type = be32_to_cpup(p);
4398
4399 /* thi_hintset bitmap */
4400 status = decode_attr_bitmap(xdr, bitmap);
4401 if (status < 0)
4402 goto xdr_error;
4403
4404 /* thi_hintlist length */
4405 status = decode_attr_length(xdr, &attrlen, &savep);
4406 if (status < 0)
4407 goto xdr_error;
4408 /* thi_hintlist */
4409 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4410 if (status < 0)
4411 goto xdr_error;
4412 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4413 if (status < 0)
4414 goto xdr_error;
4415 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4416 THRESHOLD_RD_IO);
4417 if (status < 0)
4418 goto xdr_error;
4419 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4420 THRESHOLD_WR_IO);
4421 if (status < 0)
4422 goto xdr_error;
4423
4424 status = verify_attr_len(xdr, savep, attrlen);
4425 res->bm = bitmap[0];
4426
4427 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4428 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4429 res->wr_io_sz);
4430 xdr_error:
4431 dprintk("%s ret=%d!\n", __func__, status);
4432 return status;
4433 }
4434
4435 /*
4436 * Thresholds on pNFS direct I/O vrs MDS I/O
4437 */
4438 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4439 uint32_t *bitmap,
4440 struct nfs4_threshold *res)
4441 {
4442 __be32 *p;
4443 int status = 0;
4444 uint32_t num;
4445
4446 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4447 return -EIO;
4448 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4449 /* Did the server return an unrequested attribute? */
4450 if (unlikely(res == NULL))
4451 return -EREMOTEIO;
4452 p = xdr_inline_decode(xdr, 4);
4453 if (unlikely(!p))
4454 goto out_overflow;
4455 num = be32_to_cpup(p);
4456 if (num == 0)
4457 return 0;
4458 if (num > 1)
4459 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4460 "drivers per filesystem not supported\n",
4461 __func__);
4462
4463 status = decode_first_threshold_item4(xdr, res);
4464 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4465 }
4466 return status;
4467 out_overflow:
4468 print_overflow_msg(__func__, xdr);
4469 return -EIO;
4470 }
4471
4472 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4473 struct nfs_fattr *fattr, struct nfs_fh *fh,
4474 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4475 const struct nfs_server *server)
4476 {
4477 int status;
4478 umode_t fmode = 0;
4479 uint32_t type;
4480 int32_t err;
4481
4482 status = decode_attr_type(xdr, bitmap, &type);
4483 if (status < 0)
4484 goto xdr_error;
4485 fattr->mode = 0;
4486 if (status != 0) {
4487 fattr->mode |= nfs_type2fmt[type];
4488 fattr->valid |= status;
4489 }
4490
4491 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4492 if (status < 0)
4493 goto xdr_error;
4494 fattr->valid |= status;
4495
4496 status = decode_attr_size(xdr, bitmap, &fattr->size);
4497 if (status < 0)
4498 goto xdr_error;
4499 fattr->valid |= status;
4500
4501 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4502 if (status < 0)
4503 goto xdr_error;
4504 fattr->valid |= status;
4505
4506 err = 0;
4507 status = decode_attr_error(xdr, bitmap, &err);
4508 if (status < 0)
4509 goto xdr_error;
4510
4511 status = decode_attr_filehandle(xdr, bitmap, fh);
4512 if (status < 0)
4513 goto xdr_error;
4514
4515 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4516 if (status < 0)
4517 goto xdr_error;
4518 fattr->valid |= status;
4519
4520 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4521 if (status < 0)
4522 goto xdr_error;
4523 fattr->valid |= status;
4524
4525 status = decode_attr_mode(xdr, bitmap, &fmode);
4526 if (status < 0)
4527 goto xdr_error;
4528 if (status != 0) {
4529 fattr->mode |= fmode;
4530 fattr->valid |= status;
4531 }
4532
4533 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4534 if (status < 0)
4535 goto xdr_error;
4536 fattr->valid |= status;
4537
4538 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4539 if (status < 0)
4540 goto xdr_error;
4541 fattr->valid |= status;
4542
4543 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4544 if (status < 0)
4545 goto xdr_error;
4546 fattr->valid |= status;
4547
4548 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4549 if (status < 0)
4550 goto xdr_error;
4551 fattr->valid |= status;
4552
4553 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4554 if (status < 0)
4555 goto xdr_error;
4556 fattr->valid |= status;
4557
4558 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4559 if (status < 0)
4560 goto xdr_error;
4561 fattr->valid |= status;
4562
4563 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->valid |= status;
4567
4568 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4569 if (status < 0)
4570 goto xdr_error;
4571 fattr->valid |= status;
4572
4573 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4579 if (status < 0)
4580 goto xdr_error;
4581
4582 if (label) {
4583 status = decode_attr_security_label(xdr, bitmap, label);
4584 if (status < 0)
4585 goto xdr_error;
4586 fattr->valid |= status;
4587 }
4588
4589 xdr_error:
4590 dprintk("%s: xdr returned %d\n", __func__, -status);
4591 return status;
4592 }
4593
4594 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4595 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4596 struct nfs4_label *label, const struct nfs_server *server)
4597 {
4598 unsigned int savep;
4599 uint32_t attrlen,
4600 bitmap[3] = {0};
4601 int status;
4602
4603 status = decode_op_hdr(xdr, OP_GETATTR);
4604 if (status < 0)
4605 goto xdr_error;
4606
4607 status = decode_attr_bitmap(xdr, bitmap);
4608 if (status < 0)
4609 goto xdr_error;
4610
4611 status = decode_attr_length(xdr, &attrlen, &savep);
4612 if (status < 0)
4613 goto xdr_error;
4614
4615 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4616 label, server);
4617 if (status < 0)
4618 goto xdr_error;
4619
4620 status = verify_attr_len(xdr, savep, attrlen);
4621 xdr_error:
4622 dprintk("%s: xdr returned %d\n", __func__, -status);
4623 return status;
4624 }
4625
4626 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4627 struct nfs4_label *label, const struct nfs_server *server)
4628 {
4629 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4630 }
4631
4632 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4633 const struct nfs_server *server)
4634 {
4635 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4636 }
4637
4638 /*
4639 * Decode potentially multiple layout types. Currently we only support
4640 * one layout driver per file system.
4641 */
4642 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4643 uint32_t *layouttype)
4644 {
4645 uint32_t *p;
4646 int num;
4647
4648 p = xdr_inline_decode(xdr, 4);
4649 if (unlikely(!p))
4650 goto out_overflow;
4651 num = be32_to_cpup(p);
4652
4653 /* pNFS is not supported by the underlying file system */
4654 if (num == 0) {
4655 *layouttype = 0;
4656 return 0;
4657 }
4658 if (num > 1)
4659 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4660 "drivers per filesystem not supported\n", __func__);
4661
4662 /* Decode and set first layout type, move xdr->p past unused types */
4663 p = xdr_inline_decode(xdr, num * 4);
4664 if (unlikely(!p))
4665 goto out_overflow;
4666 *layouttype = be32_to_cpup(p);
4667 return 0;
4668 out_overflow:
4669 print_overflow_msg(__func__, xdr);
4670 return -EIO;
4671 }
4672
4673 /*
4674 * The type of file system exported.
4675 * Note we must ensure that layouttype is set in any non-error case.
4676 */
4677 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4678 uint32_t *layouttype)
4679 {
4680 int status = 0;
4681
4682 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4683 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4684 return -EIO;
4685 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4686 status = decode_first_pnfs_layout_type(xdr, layouttype);
4687 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4688 } else
4689 *layouttype = 0;
4690 return status;
4691 }
4692
4693 /*
4694 * The prefered block size for layout directed io
4695 */
4696 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4697 uint32_t *res)
4698 {
4699 __be32 *p;
4700
4701 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4702 *res = 0;
4703 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4704 p = xdr_inline_decode(xdr, 4);
4705 if (unlikely(!p)) {
4706 print_overflow_msg(__func__, xdr);
4707 return -EIO;
4708 }
4709 *res = be32_to_cpup(p);
4710 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4711 }
4712 return 0;
4713 }
4714
4715 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4716 {
4717 unsigned int savep;
4718 uint32_t attrlen, bitmap[3];
4719 int status;
4720
4721 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4722 goto xdr_error;
4723 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4724 goto xdr_error;
4725 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4726 goto xdr_error;
4727
4728 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4729
4730 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4731 goto xdr_error;
4732 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4733 goto xdr_error;
4734 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4735 goto xdr_error;
4736 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4737 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4738 goto xdr_error;
4739 fsinfo->wtpref = fsinfo->wtmax;
4740 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4741 if (status != 0)
4742 goto xdr_error;
4743 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4744 if (status != 0)
4745 goto xdr_error;
4746 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4747 if (status)
4748 goto xdr_error;
4749
4750 status = verify_attr_len(xdr, savep, attrlen);
4751 xdr_error:
4752 dprintk("%s: xdr returned %d!\n", __func__, -status);
4753 return status;
4754 }
4755
4756 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4757 {
4758 __be32 *p;
4759 uint32_t len;
4760 int status;
4761
4762 /* Zero handle first to allow comparisons */
4763 memset(fh, 0, sizeof(*fh));
4764
4765 status = decode_op_hdr(xdr, OP_GETFH);
4766 if (status)
4767 return status;
4768
4769 p = xdr_inline_decode(xdr, 4);
4770 if (unlikely(!p))
4771 goto out_overflow;
4772 len = be32_to_cpup(p);
4773 if (len > NFS4_FHSIZE)
4774 return -EIO;
4775 fh->size = len;
4776 p = xdr_inline_decode(xdr, len);
4777 if (unlikely(!p))
4778 goto out_overflow;
4779 memcpy(fh->data, p, len);
4780 return 0;
4781 out_overflow:
4782 print_overflow_msg(__func__, xdr);
4783 return -EIO;
4784 }
4785
4786 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4787 {
4788 int status;
4789
4790 status = decode_op_hdr(xdr, OP_LINK);
4791 if (status)
4792 return status;
4793 return decode_change_info(xdr, cinfo);
4794 }
4795
4796 /*
4797 * We create the owner, so we know a proper owner.id length is 4.
4798 */
4799 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4800 {
4801 uint64_t offset, length, clientid;
4802 __be32 *p;
4803 uint32_t namelen, type;
4804
4805 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4806 if (unlikely(!p))
4807 goto out_overflow;
4808 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4809 p = xdr_decode_hyper(p, &length);
4810 type = be32_to_cpup(p++); /* 4 byte read */
4811 if (fl != NULL) { /* manipulate file lock */
4812 fl->fl_start = (loff_t)offset;
4813 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4814 if (length == ~(uint64_t)0)
4815 fl->fl_end = OFFSET_MAX;
4816 fl->fl_type = F_WRLCK;
4817 if (type & 1)
4818 fl->fl_type = F_RDLCK;
4819 fl->fl_pid = 0;
4820 }
4821 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4822 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4823 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4824 if (likely(p))
4825 return -NFS4ERR_DENIED;
4826 out_overflow:
4827 print_overflow_msg(__func__, xdr);
4828 return -EIO;
4829 }
4830
4831 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4832 {
4833 int status;
4834
4835 status = decode_op_hdr(xdr, OP_LOCK);
4836 if (status == -EIO)
4837 goto out;
4838 if (status == 0) {
4839 status = decode_stateid(xdr, &res->stateid);
4840 if (unlikely(status))
4841 goto out;
4842 } else if (status == -NFS4ERR_DENIED)
4843 status = decode_lock_denied(xdr, NULL);
4844 if (res->open_seqid != NULL)
4845 nfs_increment_open_seqid(status, res->open_seqid);
4846 nfs_increment_lock_seqid(status, res->lock_seqid);
4847 out:
4848 return status;
4849 }
4850
4851 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4852 {
4853 int status;
4854 status = decode_op_hdr(xdr, OP_LOCKT);
4855 if (status == -NFS4ERR_DENIED)
4856 return decode_lock_denied(xdr, res->denied);
4857 return status;
4858 }
4859
4860 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4861 {
4862 int status;
4863
4864 status = decode_op_hdr(xdr, OP_LOCKU);
4865 if (status != -EIO)
4866 nfs_increment_lock_seqid(status, res->seqid);
4867 if (status == 0)
4868 status = decode_stateid(xdr, &res->stateid);
4869 return status;
4870 }
4871
4872 static int decode_release_lockowner(struct xdr_stream *xdr)
4873 {
4874 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4875 }
4876
4877 static int decode_lookup(struct xdr_stream *xdr)
4878 {
4879 return decode_op_hdr(xdr, OP_LOOKUP);
4880 }
4881
4882 /* This is too sick! */
4883 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4884 {
4885 __be32 *p;
4886 uint32_t limit_type, nblocks, blocksize;
4887
4888 p = xdr_inline_decode(xdr, 12);
4889 if (unlikely(!p))
4890 goto out_overflow;
4891 limit_type = be32_to_cpup(p++);
4892 switch (limit_type) {
4893 case 1:
4894 xdr_decode_hyper(p, maxsize);
4895 break;
4896 case 2:
4897 nblocks = be32_to_cpup(p++);
4898 blocksize = be32_to_cpup(p);
4899 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4900 }
4901 return 0;
4902 out_overflow:
4903 print_overflow_msg(__func__, xdr);
4904 return -EIO;
4905 }
4906
4907 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4908 {
4909 __be32 *p;
4910 uint32_t delegation_type;
4911 int status;
4912
4913 p = xdr_inline_decode(xdr, 4);
4914 if (unlikely(!p))
4915 goto out_overflow;
4916 delegation_type = be32_to_cpup(p);
4917 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4918 res->delegation_type = 0;
4919 return 0;
4920 }
4921 status = decode_stateid(xdr, &res->delegation);
4922 if (unlikely(status))
4923 return status;
4924 p = xdr_inline_decode(xdr, 4);
4925 if (unlikely(!p))
4926 goto out_overflow;
4927 res->do_recall = be32_to_cpup(p);
4928
4929 switch (delegation_type) {
4930 case NFS4_OPEN_DELEGATE_READ:
4931 res->delegation_type = FMODE_READ;
4932 break;
4933 case NFS4_OPEN_DELEGATE_WRITE:
4934 res->delegation_type = FMODE_WRITE|FMODE_READ;
4935 if (decode_space_limit(xdr, &res->maxsize) < 0)
4936 return -EIO;
4937 }
4938 return decode_ace(xdr, NULL, res->server->nfs_client);
4939 out_overflow:
4940 print_overflow_msg(__func__, xdr);
4941 return -EIO;
4942 }
4943
4944 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4945 {
4946 __be32 *p;
4947 uint32_t savewords, bmlen, i;
4948 int status;
4949
4950 status = decode_op_hdr(xdr, OP_OPEN);
4951 if (status != -EIO)
4952 nfs_increment_open_seqid(status, res->seqid);
4953 if (!status)
4954 status = decode_stateid(xdr, &res->stateid);
4955 if (unlikely(status))
4956 return status;
4957
4958 decode_change_info(xdr, &res->cinfo);
4959
4960 p = xdr_inline_decode(xdr, 8);
4961 if (unlikely(!p))
4962 goto out_overflow;
4963 res->rflags = be32_to_cpup(p++);
4964 bmlen = be32_to_cpup(p);
4965 if (bmlen > 10)
4966 goto xdr_error;
4967
4968 p = xdr_inline_decode(xdr, bmlen << 2);
4969 if (unlikely(!p))
4970 goto out_overflow;
4971 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4972 for (i = 0; i < savewords; ++i)
4973 res->attrset[i] = be32_to_cpup(p++);
4974 for (; i < NFS4_BITMAP_SIZE; i++)
4975 res->attrset[i] = 0;
4976
4977 return decode_delegation(xdr, res);
4978 xdr_error:
4979 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4980 return -EIO;
4981 out_overflow:
4982 print_overflow_msg(__func__, xdr);
4983 return -EIO;
4984 }
4985
4986 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4987 {
4988 int status;
4989
4990 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4991 if (status != -EIO)
4992 nfs_increment_open_seqid(status, res->seqid);
4993 if (!status)
4994 status = decode_stateid(xdr, &res->stateid);
4995 return status;
4996 }
4997
4998 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4999 {
5000 int status;
5001
5002 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5003 if (status != -EIO)
5004 nfs_increment_open_seqid(status, res->seqid);
5005 if (!status)
5006 status = decode_stateid(xdr, &res->stateid);
5007 return status;
5008 }
5009
5010 static int decode_putfh(struct xdr_stream *xdr)
5011 {
5012 return decode_op_hdr(xdr, OP_PUTFH);
5013 }
5014
5015 static int decode_putrootfh(struct xdr_stream *xdr)
5016 {
5017 return decode_op_hdr(xdr, OP_PUTROOTFH);
5018 }
5019
5020 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5021 {
5022 __be32 *p;
5023 uint32_t count, eof, recvd;
5024 int status;
5025
5026 status = decode_op_hdr(xdr, OP_READ);
5027 if (status)
5028 return status;
5029 p = xdr_inline_decode(xdr, 8);
5030 if (unlikely(!p))
5031 goto out_overflow;
5032 eof = be32_to_cpup(p++);
5033 count = be32_to_cpup(p);
5034 recvd = xdr_read_pages(xdr, count);
5035 if (count > recvd) {
5036 dprintk("NFS: server cheating in read reply: "
5037 "count %u > recvd %u\n", count, recvd);
5038 count = recvd;
5039 eof = 0;
5040 }
5041 res->eof = eof;
5042 res->count = count;
5043 return 0;
5044 out_overflow:
5045 print_overflow_msg(__func__, xdr);
5046 return -EIO;
5047 }
5048
5049 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5050 {
5051 int status;
5052 __be32 verf[2];
5053
5054 status = decode_op_hdr(xdr, OP_READDIR);
5055 if (!status)
5056 status = decode_verifier(xdr, readdir->verifier.data);
5057 if (unlikely(status))
5058 return status;
5059 memcpy(verf, readdir->verifier.data, sizeof(verf));
5060 dprintk("%s: verifier = %08x:%08x\n",
5061 __func__, verf[0], verf[1]);
5062 return xdr_read_pages(xdr, xdr->buf->page_len);
5063 }
5064
5065 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5066 {
5067 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5068 u32 len, recvd;
5069 __be32 *p;
5070 int status;
5071
5072 status = decode_op_hdr(xdr, OP_READLINK);
5073 if (status)
5074 return status;
5075
5076 /* Convert length of symlink */
5077 p = xdr_inline_decode(xdr, 4);
5078 if (unlikely(!p))
5079 goto out_overflow;
5080 len = be32_to_cpup(p);
5081 if (len >= rcvbuf->page_len || len <= 0) {
5082 dprintk("nfs: server returned giant symlink!\n");
5083 return -ENAMETOOLONG;
5084 }
5085 recvd = xdr_read_pages(xdr, len);
5086 if (recvd < len) {
5087 dprintk("NFS: server cheating in readlink reply: "
5088 "count %u > recvd %u\n", len, recvd);
5089 return -EIO;
5090 }
5091 /*
5092 * The XDR encode routine has set things up so that
5093 * the link text will be copied directly into the
5094 * buffer. We just have to do overflow-checking,
5095 * and and null-terminate the text (the VFS expects
5096 * null-termination).
5097 */
5098 xdr_terminate_string(rcvbuf, len);
5099 return 0;
5100 out_overflow:
5101 print_overflow_msg(__func__, xdr);
5102 return -EIO;
5103 }
5104
5105 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5106 {
5107 int status;
5108
5109 status = decode_op_hdr(xdr, OP_REMOVE);
5110 if (status)
5111 goto out;
5112 status = decode_change_info(xdr, cinfo);
5113 out:
5114 return status;
5115 }
5116
5117 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5118 struct nfs4_change_info *new_cinfo)
5119 {
5120 int status;
5121
5122 status = decode_op_hdr(xdr, OP_RENAME);
5123 if (status)
5124 goto out;
5125 if ((status = decode_change_info(xdr, old_cinfo)))
5126 goto out;
5127 status = decode_change_info(xdr, new_cinfo);
5128 out:
5129 return status;
5130 }
5131
5132 static int decode_renew(struct xdr_stream *xdr)
5133 {
5134 return decode_op_hdr(xdr, OP_RENEW);
5135 }
5136
5137 static int
5138 decode_restorefh(struct xdr_stream *xdr)
5139 {
5140 return decode_op_hdr(xdr, OP_RESTOREFH);
5141 }
5142
5143 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5144 struct nfs_getaclres *res)
5145 {
5146 unsigned int savep;
5147 uint32_t attrlen,
5148 bitmap[3] = {0};
5149 int status;
5150 unsigned int pg_offset;
5151
5152 res->acl_len = 0;
5153 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5154 goto out;
5155
5156 xdr_enter_page(xdr, xdr->buf->page_len);
5157
5158 /* Calculate the offset of the page data */
5159 pg_offset = xdr->buf->head[0].iov_len;
5160
5161 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5162 goto out;
5163 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5164 goto out;
5165
5166 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5167 return -EIO;
5168 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5169
5170 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5171 * are stored with the acl data to handle the problem of
5172 * variable length bitmaps.*/
5173 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5174 res->acl_len = attrlen;
5175
5176 /* Check for receive buffer overflow */
5177 if (res->acl_len > (xdr->nwords << 2) ||
5178 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5179 res->acl_flags |= NFS4_ACL_TRUNC;
5180 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5181 attrlen, xdr->nwords << 2);
5182 }
5183 } else
5184 status = -EOPNOTSUPP;
5185
5186 out:
5187 return status;
5188 }
5189
5190 static int
5191 decode_savefh(struct xdr_stream *xdr)
5192 {
5193 return decode_op_hdr(xdr, OP_SAVEFH);
5194 }
5195
5196 static int decode_setattr(struct xdr_stream *xdr)
5197 {
5198 __be32 *p;
5199 uint32_t bmlen;
5200 int status;
5201
5202 status = decode_op_hdr(xdr, OP_SETATTR);
5203 if (status)
5204 return status;
5205 p = xdr_inline_decode(xdr, 4);
5206 if (unlikely(!p))
5207 goto out_overflow;
5208 bmlen = be32_to_cpup(p);
5209 p = xdr_inline_decode(xdr, bmlen << 2);
5210 if (likely(p))
5211 return 0;
5212 out_overflow:
5213 print_overflow_msg(__func__, xdr);
5214 return -EIO;
5215 }
5216
5217 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5218 {
5219 __be32 *p;
5220 uint32_t opnum;
5221 int32_t nfserr;
5222
5223 p = xdr_inline_decode(xdr, 8);
5224 if (unlikely(!p))
5225 goto out_overflow;
5226 opnum = be32_to_cpup(p++);
5227 if (opnum != OP_SETCLIENTID) {
5228 dprintk("nfs: decode_setclientid: Server returned operation"
5229 " %d\n", opnum);
5230 return -EIO;
5231 }
5232 nfserr = be32_to_cpup(p);
5233 if (nfserr == NFS_OK) {
5234 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5235 if (unlikely(!p))
5236 goto out_overflow;
5237 p = xdr_decode_hyper(p, &res->clientid);
5238 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5239 } else if (nfserr == NFSERR_CLID_INUSE) {
5240 uint32_t len;
5241
5242 /* skip netid string */
5243 p = xdr_inline_decode(xdr, 4);
5244 if (unlikely(!p))
5245 goto out_overflow;
5246 len = be32_to_cpup(p);
5247 p = xdr_inline_decode(xdr, len);
5248 if (unlikely(!p))
5249 goto out_overflow;
5250
5251 /* skip uaddr string */
5252 p = xdr_inline_decode(xdr, 4);
5253 if (unlikely(!p))
5254 goto out_overflow;
5255 len = be32_to_cpup(p);
5256 p = xdr_inline_decode(xdr, len);
5257 if (unlikely(!p))
5258 goto out_overflow;
5259 return -NFSERR_CLID_INUSE;
5260 } else
5261 return nfs4_stat_to_errno(nfserr);
5262
5263 return 0;
5264 out_overflow:
5265 print_overflow_msg(__func__, xdr);
5266 return -EIO;
5267 }
5268
5269 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5270 {
5271 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5272 }
5273
5274 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5275 {
5276 __be32 *p;
5277 int status;
5278
5279 status = decode_op_hdr(xdr, OP_WRITE);
5280 if (status)
5281 return status;
5282
5283 p = xdr_inline_decode(xdr, 8);
5284 if (unlikely(!p))
5285 goto out_overflow;
5286 res->count = be32_to_cpup(p++);
5287 res->verf->committed = be32_to_cpup(p++);
5288 return decode_write_verifier(xdr, &res->verf->verifier);
5289 out_overflow:
5290 print_overflow_msg(__func__, xdr);
5291 return -EIO;
5292 }
5293
5294 static int decode_delegreturn(struct xdr_stream *xdr)
5295 {
5296 return decode_op_hdr(xdr, OP_DELEGRETURN);
5297 }
5298
5299 static int decode_secinfo_gss(struct xdr_stream *xdr,
5300 struct nfs4_secinfo4 *flavor)
5301 {
5302 u32 oid_len;
5303 __be32 *p;
5304
5305 p = xdr_inline_decode(xdr, 4);
5306 if (unlikely(!p))
5307 goto out_overflow;
5308 oid_len = be32_to_cpup(p);
5309 if (oid_len > GSS_OID_MAX_LEN)
5310 goto out_err;
5311
5312 p = xdr_inline_decode(xdr, oid_len);
5313 if (unlikely(!p))
5314 goto out_overflow;
5315 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5316 flavor->flavor_info.oid.len = oid_len;
5317
5318 p = xdr_inline_decode(xdr, 8);
5319 if (unlikely(!p))
5320 goto out_overflow;
5321 flavor->flavor_info.qop = be32_to_cpup(p++);
5322 flavor->flavor_info.service = be32_to_cpup(p);
5323
5324 return 0;
5325
5326 out_overflow:
5327 print_overflow_msg(__func__, xdr);
5328 return -EIO;
5329 out_err:
5330 return -EINVAL;
5331 }
5332
5333 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5334 {
5335 struct nfs4_secinfo4 *sec_flavor;
5336 unsigned int i, num_flavors;
5337 int status;
5338 __be32 *p;
5339
5340 p = xdr_inline_decode(xdr, 4);
5341 if (unlikely(!p))
5342 goto out_overflow;
5343
5344 res->flavors->num_flavors = 0;
5345 num_flavors = be32_to_cpup(p);
5346
5347 for (i = 0; i < num_flavors; i++) {
5348 sec_flavor = &res->flavors->flavors[i];
5349 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5350 break;
5351
5352 p = xdr_inline_decode(xdr, 4);
5353 if (unlikely(!p))
5354 goto out_overflow;
5355 sec_flavor->flavor = be32_to_cpup(p);
5356
5357 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5358 status = decode_secinfo_gss(xdr, sec_flavor);
5359 if (status)
5360 goto out;
5361 }
5362 res->flavors->num_flavors++;
5363 }
5364
5365 status = 0;
5366 out:
5367 return status;
5368 out_overflow:
5369 print_overflow_msg(__func__, xdr);
5370 return -EIO;
5371 }
5372
5373 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5374 {
5375 int status = decode_op_hdr(xdr, OP_SECINFO);
5376 if (status)
5377 return status;
5378 return decode_secinfo_common(xdr, res);
5379 }
5380
5381 #if defined(CONFIG_NFS_V4_1)
5382 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5383 {
5384 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5385 if (status)
5386 return status;
5387 return decode_secinfo_common(xdr, res);
5388 }
5389
5390 static int decode_exchange_id(struct xdr_stream *xdr,
5391 struct nfs41_exchange_id_res *res)
5392 {
5393 __be32 *p;
5394 uint32_t dummy;
5395 char *dummy_str;
5396 int status;
5397 uint32_t impl_id_count;
5398
5399 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5400 if (status)
5401 return status;
5402
5403 p = xdr_inline_decode(xdr, 8);
5404 if (unlikely(!p))
5405 goto out_overflow;
5406 xdr_decode_hyper(p, &res->clientid);
5407 p = xdr_inline_decode(xdr, 12);
5408 if (unlikely(!p))
5409 goto out_overflow;
5410 res->seqid = be32_to_cpup(p++);
5411 res->flags = be32_to_cpup(p++);
5412
5413 /* We ask for SP4_NONE */
5414 dummy = be32_to_cpup(p);
5415 if (dummy != SP4_NONE)
5416 return -EIO;
5417
5418 /* server_owner4.so_minor_id */
5419 p = xdr_inline_decode(xdr, 8);
5420 if (unlikely(!p))
5421 goto out_overflow;
5422 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5423
5424 /* server_owner4.so_major_id */
5425 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5426 if (unlikely(status))
5427 return status;
5428 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5429 return -EIO;
5430 memcpy(res->server_owner->major_id, dummy_str, dummy);
5431 res->server_owner->major_id_sz = dummy;
5432
5433 /* server_scope4 */
5434 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5435 if (unlikely(status))
5436 return status;
5437 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5438 return -EIO;
5439 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5440 res->server_scope->server_scope_sz = dummy;
5441
5442 /* Implementation Id */
5443 p = xdr_inline_decode(xdr, 4);
5444 if (unlikely(!p))
5445 goto out_overflow;
5446 impl_id_count = be32_to_cpup(p++);
5447
5448 if (impl_id_count) {
5449 /* nii_domain */
5450 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5451 if (unlikely(status))
5452 return status;
5453 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5454 return -EIO;
5455 memcpy(res->impl_id->domain, dummy_str, dummy);
5456
5457 /* nii_name */
5458 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5459 if (unlikely(status))
5460 return status;
5461 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5462 return -EIO;
5463 memcpy(res->impl_id->name, dummy_str, dummy);
5464
5465 /* nii_date */
5466 p = xdr_inline_decode(xdr, 12);
5467 if (unlikely(!p))
5468 goto out_overflow;
5469 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5470 res->impl_id->date.nseconds = be32_to_cpup(p);
5471
5472 /* if there's more than one entry, ignore the rest */
5473 }
5474 return 0;
5475 out_overflow:
5476 print_overflow_msg(__func__, xdr);
5477 return -EIO;
5478 }
5479
5480 static int decode_chan_attrs(struct xdr_stream *xdr,
5481 struct nfs4_channel_attrs *attrs)
5482 {
5483 __be32 *p;
5484 u32 nr_attrs, val;
5485
5486 p = xdr_inline_decode(xdr, 28);
5487 if (unlikely(!p))
5488 goto out_overflow;
5489 val = be32_to_cpup(p++); /* headerpadsz */
5490 if (val)
5491 return -EINVAL; /* no support for header padding yet */
5492 attrs->max_rqst_sz = be32_to_cpup(p++);
5493 attrs->max_resp_sz = be32_to_cpup(p++);
5494 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5495 attrs->max_ops = be32_to_cpup(p++);
5496 attrs->max_reqs = be32_to_cpup(p++);
5497 nr_attrs = be32_to_cpup(p);
5498 if (unlikely(nr_attrs > 1)) {
5499 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5500 "count %u\n", __func__, nr_attrs);
5501 return -EINVAL;
5502 }
5503 if (nr_attrs == 1) {
5504 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5505 if (unlikely(!p))
5506 goto out_overflow;
5507 }
5508 return 0;
5509 out_overflow:
5510 print_overflow_msg(__func__, xdr);
5511 return -EIO;
5512 }
5513
5514 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5515 {
5516 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5517 }
5518
5519 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5520 struct nfs41_bind_conn_to_session_res *res)
5521 {
5522 __be32 *p;
5523 int status;
5524
5525 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5526 if (!status)
5527 status = decode_sessionid(xdr, &res->session->sess_id);
5528 if (unlikely(status))
5529 return status;
5530
5531 /* dir flags, rdma mode bool */
5532 p = xdr_inline_decode(xdr, 8);
5533 if (unlikely(!p))
5534 goto out_overflow;
5535
5536 res->dir = be32_to_cpup(p++);
5537 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5538 return -EIO;
5539 if (be32_to_cpup(p) == 0)
5540 res->use_conn_in_rdma_mode = false;
5541 else
5542 res->use_conn_in_rdma_mode = true;
5543
5544 return 0;
5545 out_overflow:
5546 print_overflow_msg(__func__, xdr);
5547 return -EIO;
5548 }
5549
5550 static int decode_create_session(struct xdr_stream *xdr,
5551 struct nfs41_create_session_res *res)
5552 {
5553 __be32 *p;
5554 int status;
5555 struct nfs_client *clp = res->client;
5556 struct nfs4_session *session = clp->cl_session;
5557
5558 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5559 if (!status)
5560 status = decode_sessionid(xdr, &session->sess_id);
5561 if (unlikely(status))
5562 return status;
5563
5564 /* seqid, flags */
5565 p = xdr_inline_decode(xdr, 8);
5566 if (unlikely(!p))
5567 goto out_overflow;
5568 clp->cl_seqid = be32_to_cpup(p++);
5569 session->flags = be32_to_cpup(p);
5570
5571 /* Channel attributes */
5572 status = decode_chan_attrs(xdr, &session->fc_attrs);
5573 if (!status)
5574 status = decode_chan_attrs(xdr, &session->bc_attrs);
5575 return status;
5576 out_overflow:
5577 print_overflow_msg(__func__, xdr);
5578 return -EIO;
5579 }
5580
5581 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5582 {
5583 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5584 }
5585
5586 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5587 {
5588 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5589 }
5590
5591 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5592 {
5593 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5594 }
5595 #endif /* CONFIG_NFS_V4_1 */
5596
5597 static int decode_sequence(struct xdr_stream *xdr,
5598 struct nfs4_sequence_res *res,
5599 struct rpc_rqst *rqstp)
5600 {
5601 #if defined(CONFIG_NFS_V4_1)
5602 struct nfs4_session *session;
5603 struct nfs4_sessionid id;
5604 u32 dummy;
5605 int status;
5606 __be32 *p;
5607
5608 if (res->sr_slot == NULL)
5609 return 0;
5610
5611 status = decode_op_hdr(xdr, OP_SEQUENCE);
5612 if (!status)
5613 status = decode_sessionid(xdr, &id);
5614 if (unlikely(status))
5615 goto out_err;
5616
5617 /*
5618 * If the server returns different values for sessionID, slotID or
5619 * sequence number, the server is looney tunes.
5620 */
5621 status = -EREMOTEIO;
5622 session = res->sr_slot->table->session;
5623
5624 if (memcmp(id.data, session->sess_id.data,
5625 NFS4_MAX_SESSIONID_LEN)) {
5626 dprintk("%s Invalid session id\n", __func__);
5627 goto out_err;
5628 }
5629
5630 p = xdr_inline_decode(xdr, 20);
5631 if (unlikely(!p))
5632 goto out_overflow;
5633
5634 /* seqid */
5635 dummy = be32_to_cpup(p++);
5636 if (dummy != res->sr_slot->seq_nr) {
5637 dprintk("%s Invalid sequence number\n", __func__);
5638 goto out_err;
5639 }
5640 /* slot id */
5641 dummy = be32_to_cpup(p++);
5642 if (dummy != res->sr_slot->slot_nr) {
5643 dprintk("%s Invalid slot id\n", __func__);
5644 goto out_err;
5645 }
5646 /* highest slot id */
5647 res->sr_highest_slotid = be32_to_cpup(p++);
5648 /* target highest slot id */
5649 res->sr_target_highest_slotid = be32_to_cpup(p++);
5650 /* result flags */
5651 res->sr_status_flags = be32_to_cpup(p);
5652 status = 0;
5653 out_err:
5654 res->sr_status = status;
5655 return status;
5656 out_overflow:
5657 print_overflow_msg(__func__, xdr);
5658 status = -EIO;
5659 goto out_err;
5660 #else /* CONFIG_NFS_V4_1 */
5661 return 0;
5662 #endif /* CONFIG_NFS_V4_1 */
5663 }
5664
5665 #if defined(CONFIG_NFS_V4_1)
5666 /*
5667 * TODO: Need to handle case when EOF != true;
5668 */
5669 static int decode_getdevicelist(struct xdr_stream *xdr,
5670 struct pnfs_devicelist *res)
5671 {
5672 __be32 *p;
5673 int status, i;
5674 nfs4_verifier verftemp;
5675
5676 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5677 if (status)
5678 return status;
5679
5680 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5681 if (unlikely(!p))
5682 goto out_overflow;
5683
5684 /* TODO: Skip cookie for now */
5685 p += 2;
5686
5687 /* Read verifier */
5688 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5689
5690 res->num_devs = be32_to_cpup(p);
5691
5692 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5693
5694 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5695 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5696 __func__, res->num_devs);
5697 return -EIO;
5698 }
5699
5700 p = xdr_inline_decode(xdr,
5701 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5702 if (unlikely(!p))
5703 goto out_overflow;
5704 for (i = 0; i < res->num_devs; i++)
5705 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5706 NFS4_DEVICEID4_SIZE);
5707 res->eof = be32_to_cpup(p);
5708 return 0;
5709 out_overflow:
5710 print_overflow_msg(__func__, xdr);
5711 return -EIO;
5712 }
5713
5714 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5715 struct pnfs_device *pdev)
5716 {
5717 __be32 *p;
5718 uint32_t len, type;
5719 int status;
5720
5721 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5722 if (status) {
5723 if (status == -ETOOSMALL) {
5724 p = xdr_inline_decode(xdr, 4);
5725 if (unlikely(!p))
5726 goto out_overflow;
5727 pdev->mincount = be32_to_cpup(p);
5728 dprintk("%s: Min count too small. mincnt = %u\n",
5729 __func__, pdev->mincount);
5730 }
5731 return status;
5732 }
5733
5734 p = xdr_inline_decode(xdr, 8);
5735 if (unlikely(!p))
5736 goto out_overflow;
5737 type = be32_to_cpup(p++);
5738 if (type != pdev->layout_type) {
5739 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5740 __func__, pdev->layout_type, type);
5741 return -EINVAL;
5742 }
5743 /*
5744 * Get the length of the opaque device_addr4. xdr_read_pages places
5745 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5746 * and places the remaining xdr data in xdr_buf->tail
5747 */
5748 pdev->mincount = be32_to_cpup(p);
5749 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5750 goto out_overflow;
5751
5752 /* Parse notification bitmap, verifying that it is zero. */
5753 p = xdr_inline_decode(xdr, 4);
5754 if (unlikely(!p))
5755 goto out_overflow;
5756 len = be32_to_cpup(p);
5757 if (len) {
5758 uint32_t i;
5759
5760 p = xdr_inline_decode(xdr, 4 * len);
5761 if (unlikely(!p))
5762 goto out_overflow;
5763 for (i = 0; i < len; i++, p++) {
5764 if (be32_to_cpup(p)) {
5765 dprintk("%s: notifications not supported\n",
5766 __func__);
5767 return -EIO;
5768 }
5769 }
5770 }
5771 return 0;
5772 out_overflow:
5773 print_overflow_msg(__func__, xdr);
5774 return -EIO;
5775 }
5776
5777 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5778 struct nfs4_layoutget_res *res)
5779 {
5780 __be32 *p;
5781 int status;
5782 u32 layout_count;
5783 u32 recvd;
5784
5785 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5786 if (status)
5787 return status;
5788 p = xdr_inline_decode(xdr, 4);
5789 if (unlikely(!p))
5790 goto out_overflow;
5791 res->return_on_close = be32_to_cpup(p);
5792 decode_stateid(xdr, &res->stateid);
5793 p = xdr_inline_decode(xdr, 4);
5794 if (unlikely(!p))
5795 goto out_overflow;
5796 layout_count = be32_to_cpup(p);
5797 if (!layout_count) {
5798 dprintk("%s: server responded with empty layout array\n",
5799 __func__);
5800 return -EINVAL;
5801 }
5802
5803 p = xdr_inline_decode(xdr, 28);
5804 if (unlikely(!p))
5805 goto out_overflow;
5806 p = xdr_decode_hyper(p, &res->range.offset);
5807 p = xdr_decode_hyper(p, &res->range.length);
5808 res->range.iomode = be32_to_cpup(p++);
5809 res->type = be32_to_cpup(p++);
5810 res->layoutp->len = be32_to_cpup(p);
5811
5812 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5813 __func__,
5814 (unsigned long)res->range.offset,
5815 (unsigned long)res->range.length,
5816 res->range.iomode,
5817 res->type,
5818 res->layoutp->len);
5819
5820 recvd = xdr_read_pages(xdr, res->layoutp->len);
5821 if (res->layoutp->len > recvd) {
5822 dprintk("NFS: server cheating in layoutget reply: "
5823 "layout len %u > recvd %u\n",
5824 res->layoutp->len, recvd);
5825 return -EINVAL;
5826 }
5827
5828 if (layout_count > 1) {
5829 /* We only handle a length one array at the moment. Any
5830 * further entries are just ignored. Note that this means
5831 * the client may see a response that is less than the
5832 * minimum it requested.
5833 */
5834 dprintk("%s: server responded with %d layouts, dropping tail\n",
5835 __func__, layout_count);
5836 }
5837
5838 return 0;
5839 out_overflow:
5840 print_overflow_msg(__func__, xdr);
5841 return -EIO;
5842 }
5843
5844 static int decode_layoutreturn(struct xdr_stream *xdr,
5845 struct nfs4_layoutreturn_res *res)
5846 {
5847 __be32 *p;
5848 int status;
5849
5850 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5851 if (status)
5852 return status;
5853 p = xdr_inline_decode(xdr, 4);
5854 if (unlikely(!p))
5855 goto out_overflow;
5856 res->lrs_present = be32_to_cpup(p);
5857 if (res->lrs_present)
5858 status = decode_stateid(xdr, &res->stateid);
5859 return status;
5860 out_overflow:
5861 print_overflow_msg(__func__, xdr);
5862 return -EIO;
5863 }
5864
5865 static int decode_layoutcommit(struct xdr_stream *xdr,
5866 struct rpc_rqst *req,
5867 struct nfs4_layoutcommit_res *res)
5868 {
5869 __be32 *p;
5870 __u32 sizechanged;
5871 int status;
5872
5873 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5874 res->status = status;
5875 if (status)
5876 return status;
5877
5878 p = xdr_inline_decode(xdr, 4);
5879 if (unlikely(!p))
5880 goto out_overflow;
5881 sizechanged = be32_to_cpup(p);
5882
5883 if (sizechanged) {
5884 /* throw away new size */
5885 p = xdr_inline_decode(xdr, 8);
5886 if (unlikely(!p))
5887 goto out_overflow;
5888 }
5889 return 0;
5890 out_overflow:
5891 print_overflow_msg(__func__, xdr);
5892 return -EIO;
5893 }
5894
5895 static int decode_test_stateid(struct xdr_stream *xdr,
5896 struct nfs41_test_stateid_res *res)
5897 {
5898 __be32 *p;
5899 int status;
5900 int num_res;
5901
5902 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5903 if (status)
5904 return status;
5905
5906 p = xdr_inline_decode(xdr, 4);
5907 if (unlikely(!p))
5908 goto out_overflow;
5909 num_res = be32_to_cpup(p++);
5910 if (num_res != 1)
5911 goto out;
5912
5913 p = xdr_inline_decode(xdr, 4);
5914 if (unlikely(!p))
5915 goto out_overflow;
5916 res->status = be32_to_cpup(p++);
5917
5918 return status;
5919 out_overflow:
5920 print_overflow_msg(__func__, xdr);
5921 out:
5922 return -EIO;
5923 }
5924
5925 static int decode_free_stateid(struct xdr_stream *xdr,
5926 struct nfs41_free_stateid_res *res)
5927 {
5928 __be32 *p;
5929 int status;
5930
5931 status = decode_op_hdr(xdr, OP_FREE_STATEID);
5932 if (status)
5933 return status;
5934
5935 p = xdr_inline_decode(xdr, 4);
5936 if (unlikely(!p))
5937 goto out_overflow;
5938 res->status = be32_to_cpup(p++);
5939 return res->status;
5940 out_overflow:
5941 print_overflow_msg(__func__, xdr);
5942 return -EIO;
5943 }
5944 #endif /* CONFIG_NFS_V4_1 */
5945
5946 /*
5947 * END OF "GENERIC" DECODE ROUTINES.
5948 */
5949
5950 /*
5951 * Decode OPEN_DOWNGRADE response
5952 */
5953 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5954 struct xdr_stream *xdr,
5955 struct nfs_closeres *res)
5956 {
5957 struct compound_hdr hdr;
5958 int status;
5959
5960 status = decode_compound_hdr(xdr, &hdr);
5961 if (status)
5962 goto out;
5963 status = decode_sequence(xdr, &res->seq_res, rqstp);
5964 if (status)
5965 goto out;
5966 status = decode_putfh(xdr);
5967 if (status)
5968 goto out;
5969 status = decode_open_downgrade(xdr, res);
5970 if (status != 0)
5971 goto out;
5972 decode_getfattr(xdr, res->fattr, res->server);
5973 out:
5974 return status;
5975 }
5976
5977 /*
5978 * Decode ACCESS response
5979 */
5980 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5981 struct nfs4_accessres *res)
5982 {
5983 struct compound_hdr hdr;
5984 int status;
5985
5986 status = decode_compound_hdr(xdr, &hdr);
5987 if (status)
5988 goto out;
5989 status = decode_sequence(xdr, &res->seq_res, rqstp);
5990 if (status)
5991 goto out;
5992 status = decode_putfh(xdr);
5993 if (status != 0)
5994 goto out;
5995 status = decode_access(xdr, &res->supported, &res->access);
5996 if (status != 0)
5997 goto out;
5998 decode_getfattr(xdr, res->fattr, res->server);
5999 out:
6000 return status;
6001 }
6002
6003 /*
6004 * Decode LOOKUP response
6005 */
6006 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6007 struct nfs4_lookup_res *res)
6008 {
6009 struct compound_hdr hdr;
6010 int status;
6011
6012 status = decode_compound_hdr(xdr, &hdr);
6013 if (status)
6014 goto out;
6015 status = decode_sequence(xdr, &res->seq_res, rqstp);
6016 if (status)
6017 goto out;
6018 status = decode_putfh(xdr);
6019 if (status)
6020 goto out;
6021 status = decode_lookup(xdr);
6022 if (status)
6023 goto out;
6024 status = decode_getfh(xdr, res->fh);
6025 if (status)
6026 goto out;
6027 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6028 out:
6029 return status;
6030 }
6031
6032 /*
6033 * Decode LOOKUP_ROOT response
6034 */
6035 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6036 struct xdr_stream *xdr,
6037 struct nfs4_lookup_res *res)
6038 {
6039 struct compound_hdr hdr;
6040 int status;
6041
6042 status = decode_compound_hdr(xdr, &hdr);
6043 if (status)
6044 goto out;
6045 status = decode_sequence(xdr, &res->seq_res, rqstp);
6046 if (status)
6047 goto out;
6048 status = decode_putrootfh(xdr);
6049 if (status)
6050 goto out;
6051 status = decode_getfh(xdr, res->fh);
6052 if (status == 0)
6053 status = decode_getfattr_label(xdr, res->fattr,
6054 res->label, res->server);
6055 out:
6056 return status;
6057 }
6058
6059 /*
6060 * Decode REMOVE response
6061 */
6062 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6063 struct nfs_removeres *res)
6064 {
6065 struct compound_hdr hdr;
6066 int status;
6067
6068 status = decode_compound_hdr(xdr, &hdr);
6069 if (status)
6070 goto out;
6071 status = decode_sequence(xdr, &res->seq_res, rqstp);
6072 if (status)
6073 goto out;
6074 status = decode_putfh(xdr);
6075 if (status)
6076 goto out;
6077 status = decode_remove(xdr, &res->cinfo);
6078 out:
6079 return status;
6080 }
6081
6082 /*
6083 * Decode RENAME response
6084 */
6085 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086 struct nfs_renameres *res)
6087 {
6088 struct compound_hdr hdr;
6089 int status;
6090
6091 status = decode_compound_hdr(xdr, &hdr);
6092 if (status)
6093 goto out;
6094 status = decode_sequence(xdr, &res->seq_res, rqstp);
6095 if (status)
6096 goto out;
6097 status = decode_putfh(xdr);
6098 if (status)
6099 goto out;
6100 status = decode_savefh(xdr);
6101 if (status)
6102 goto out;
6103 status = decode_putfh(xdr);
6104 if (status)
6105 goto out;
6106 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6107 out:
6108 return status;
6109 }
6110
6111 /*
6112 * Decode LINK response
6113 */
6114 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6115 struct nfs4_link_res *res)
6116 {
6117 struct compound_hdr hdr;
6118 int status;
6119
6120 status = decode_compound_hdr(xdr, &hdr);
6121 if (status)
6122 goto out;
6123 status = decode_sequence(xdr, &res->seq_res, rqstp);
6124 if (status)
6125 goto out;
6126 status = decode_putfh(xdr);
6127 if (status)
6128 goto out;
6129 status = decode_savefh(xdr);
6130 if (status)
6131 goto out;
6132 status = decode_putfh(xdr);
6133 if (status)
6134 goto out;
6135 status = decode_link(xdr, &res->cinfo);
6136 if (status)
6137 goto out;
6138 /*
6139 * Note order: OP_LINK leaves the directory as the current
6140 * filehandle.
6141 */
6142 status = decode_restorefh(xdr);
6143 if (status)
6144 goto out;
6145 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6146 out:
6147 return status;
6148 }
6149
6150 /*
6151 * Decode CREATE response
6152 */
6153 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6154 struct nfs4_create_res *res)
6155 {
6156 struct compound_hdr hdr;
6157 int status;
6158
6159 status = decode_compound_hdr(xdr, &hdr);
6160 if (status)
6161 goto out;
6162 status = decode_sequence(xdr, &res->seq_res, rqstp);
6163 if (status)
6164 goto out;
6165 status = decode_putfh(xdr);
6166 if (status)
6167 goto out;
6168 status = decode_create(xdr, &res->dir_cinfo);
6169 if (status)
6170 goto out;
6171 status = decode_getfh(xdr, res->fh);
6172 if (status)
6173 goto out;
6174 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6175 out:
6176 return status;
6177 }
6178
6179 /*
6180 * Decode SYMLINK response
6181 */
6182 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6183 struct nfs4_create_res *res)
6184 {
6185 return nfs4_xdr_dec_create(rqstp, xdr, res);
6186 }
6187
6188 /*
6189 * Decode GETATTR response
6190 */
6191 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192 struct nfs4_getattr_res *res)
6193 {
6194 struct compound_hdr hdr;
6195 int status;
6196
6197 status = decode_compound_hdr(xdr, &hdr);
6198 if (status)
6199 goto out;
6200 status = decode_sequence(xdr, &res->seq_res, rqstp);
6201 if (status)
6202 goto out;
6203 status = decode_putfh(xdr);
6204 if (status)
6205 goto out;
6206 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6207 out:
6208 return status;
6209 }
6210
6211 /*
6212 * Encode an SETACL request
6213 */
6214 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6215 struct nfs_setaclargs *args)
6216 {
6217 struct compound_hdr hdr = {
6218 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6219 };
6220
6221 encode_compound_hdr(xdr, req, &hdr);
6222 encode_sequence(xdr, &args->seq_args, &hdr);
6223 encode_putfh(xdr, args->fh, &hdr);
6224 encode_setacl(xdr, args, &hdr);
6225 encode_nops(&hdr);
6226 }
6227
6228 /*
6229 * Decode SETACL response
6230 */
6231 static int
6232 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6233 struct nfs_setaclres *res)
6234 {
6235 struct compound_hdr hdr;
6236 int status;
6237
6238 status = decode_compound_hdr(xdr, &hdr);
6239 if (status)
6240 goto out;
6241 status = decode_sequence(xdr, &res->seq_res, rqstp);
6242 if (status)
6243 goto out;
6244 status = decode_putfh(xdr);
6245 if (status)
6246 goto out;
6247 status = decode_setattr(xdr);
6248 out:
6249 return status;
6250 }
6251
6252 /*
6253 * Decode GETACL response
6254 */
6255 static int
6256 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6257 struct nfs_getaclres *res)
6258 {
6259 struct compound_hdr hdr;
6260 int status;
6261
6262 if (res->acl_scratch != NULL) {
6263 void *p = page_address(res->acl_scratch);
6264 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6265 }
6266 status = decode_compound_hdr(xdr, &hdr);
6267 if (status)
6268 goto out;
6269 status = decode_sequence(xdr, &res->seq_res, rqstp);
6270 if (status)
6271 goto out;
6272 status = decode_putfh(xdr);
6273 if (status)
6274 goto out;
6275 status = decode_getacl(xdr, rqstp, res);
6276
6277 out:
6278 return status;
6279 }
6280
6281 /*
6282 * Decode CLOSE response
6283 */
6284 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285 struct nfs_closeres *res)
6286 {
6287 struct compound_hdr hdr;
6288 int status;
6289
6290 status = decode_compound_hdr(xdr, &hdr);
6291 if (status)
6292 goto out;
6293 status = decode_sequence(xdr, &res->seq_res, rqstp);
6294 if (status)
6295 goto out;
6296 status = decode_putfh(xdr);
6297 if (status)
6298 goto out;
6299 status = decode_close(xdr, res);
6300 if (status != 0)
6301 goto out;
6302 /*
6303 * Note: Server may do delete on close for this file
6304 * in which case the getattr call will fail with
6305 * an ESTALE error. Shouldn't be a problem,
6306 * though, since fattr->valid will remain unset.
6307 */
6308 decode_getfattr(xdr, res->fattr, res->server);
6309 out:
6310 return status;
6311 }
6312
6313 /*
6314 * Decode OPEN response
6315 */
6316 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6317 struct nfs_openres *res)
6318 {
6319 struct compound_hdr hdr;
6320 int status;
6321
6322 status = decode_compound_hdr(xdr, &hdr);
6323 if (status)
6324 goto out;
6325 status = decode_sequence(xdr, &res->seq_res, rqstp);
6326 if (status)
6327 goto out;
6328 status = decode_putfh(xdr);
6329 if (status)
6330 goto out;
6331 status = decode_open(xdr, res);
6332 if (status)
6333 goto out;
6334 status = decode_getfh(xdr, &res->fh);
6335 if (status)
6336 goto out;
6337 if (res->access_request)
6338 decode_access(xdr, &res->access_supported, &res->access_result);
6339 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6340 out:
6341 return status;
6342 }
6343
6344 /*
6345 * Decode OPEN_CONFIRM response
6346 */
6347 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6348 struct xdr_stream *xdr,
6349 struct nfs_open_confirmres *res)
6350 {
6351 struct compound_hdr hdr;
6352 int status;
6353
6354 status = decode_compound_hdr(xdr, &hdr);
6355 if (status)
6356 goto out;
6357 status = decode_putfh(xdr);
6358 if (status)
6359 goto out;
6360 status = decode_open_confirm(xdr, res);
6361 out:
6362 return status;
6363 }
6364
6365 /*
6366 * Decode OPEN response
6367 */
6368 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6369 struct xdr_stream *xdr,
6370 struct nfs_openres *res)
6371 {
6372 struct compound_hdr hdr;
6373 int status;
6374
6375 status = decode_compound_hdr(xdr, &hdr);
6376 if (status)
6377 goto out;
6378 status = decode_sequence(xdr, &res->seq_res, rqstp);
6379 if (status)
6380 goto out;
6381 status = decode_putfh(xdr);
6382 if (status)
6383 goto out;
6384 status = decode_open(xdr, res);
6385 if (status)
6386 goto out;
6387 if (res->access_request)
6388 decode_access(xdr, &res->access_supported, &res->access_result);
6389 decode_getfattr(xdr, res->f_attr, res->server);
6390 out:
6391 return status;
6392 }
6393
6394 /*
6395 * Decode SETATTR response
6396 */
6397 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6398 struct xdr_stream *xdr,
6399 struct nfs_setattrres *res)
6400 {
6401 struct compound_hdr hdr;
6402 int status;
6403
6404 status = decode_compound_hdr(xdr, &hdr);
6405 if (status)
6406 goto out;
6407 status = decode_sequence(xdr, &res->seq_res, rqstp);
6408 if (status)
6409 goto out;
6410 status = decode_putfh(xdr);
6411 if (status)
6412 goto out;
6413 status = decode_setattr(xdr);
6414 if (status)
6415 goto out;
6416 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6417 out:
6418 return status;
6419 }
6420
6421 /*
6422 * Decode LOCK response
6423 */
6424 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425 struct nfs_lock_res *res)
6426 {
6427 struct compound_hdr hdr;
6428 int status;
6429
6430 status = decode_compound_hdr(xdr, &hdr);
6431 if (status)
6432 goto out;
6433 status = decode_sequence(xdr, &res->seq_res, rqstp);
6434 if (status)
6435 goto out;
6436 status = decode_putfh(xdr);
6437 if (status)
6438 goto out;
6439 status = decode_lock(xdr, res);
6440 out:
6441 return status;
6442 }
6443
6444 /*
6445 * Decode LOCKT response
6446 */
6447 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6448 struct nfs_lockt_res *res)
6449 {
6450 struct compound_hdr hdr;
6451 int status;
6452
6453 status = decode_compound_hdr(xdr, &hdr);
6454 if (status)
6455 goto out;
6456 status = decode_sequence(xdr, &res->seq_res, rqstp);
6457 if (status)
6458 goto out;
6459 status = decode_putfh(xdr);
6460 if (status)
6461 goto out;
6462 status = decode_lockt(xdr, res);
6463 out:
6464 return status;
6465 }
6466
6467 /*
6468 * Decode LOCKU response
6469 */
6470 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6471 struct nfs_locku_res *res)
6472 {
6473 struct compound_hdr hdr;
6474 int status;
6475
6476 status = decode_compound_hdr(xdr, &hdr);
6477 if (status)
6478 goto out;
6479 status = decode_sequence(xdr, &res->seq_res, rqstp);
6480 if (status)
6481 goto out;
6482 status = decode_putfh(xdr);
6483 if (status)
6484 goto out;
6485 status = decode_locku(xdr, res);
6486 out:
6487 return status;
6488 }
6489
6490 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6491 struct xdr_stream *xdr, void *dummy)
6492 {
6493 struct compound_hdr hdr;
6494 int status;
6495
6496 status = decode_compound_hdr(xdr, &hdr);
6497 if (!status)
6498 status = decode_release_lockowner(xdr);
6499 return status;
6500 }
6501
6502 /*
6503 * Decode READLINK response
6504 */
6505 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6506 struct xdr_stream *xdr,
6507 struct nfs4_readlink_res *res)
6508 {
6509 struct compound_hdr hdr;
6510 int status;
6511
6512 status = decode_compound_hdr(xdr, &hdr);
6513 if (status)
6514 goto out;
6515 status = decode_sequence(xdr, &res->seq_res, rqstp);
6516 if (status)
6517 goto out;
6518 status = decode_putfh(xdr);
6519 if (status)
6520 goto out;
6521 status = decode_readlink(xdr, rqstp);
6522 out:
6523 return status;
6524 }
6525
6526 /*
6527 * Decode READDIR response
6528 */
6529 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6530 struct nfs4_readdir_res *res)
6531 {
6532 struct compound_hdr hdr;
6533 int status;
6534
6535 status = decode_compound_hdr(xdr, &hdr);
6536 if (status)
6537 goto out;
6538 status = decode_sequence(xdr, &res->seq_res, rqstp);
6539 if (status)
6540 goto out;
6541 status = decode_putfh(xdr);
6542 if (status)
6543 goto out;
6544 status = decode_readdir(xdr, rqstp, res);
6545 out:
6546 return status;
6547 }
6548
6549 /*
6550 * Decode Read response
6551 */
6552 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6553 struct nfs_readres *res)
6554 {
6555 struct compound_hdr hdr;
6556 int status;
6557
6558 status = decode_compound_hdr(xdr, &hdr);
6559 if (status)
6560 goto out;
6561 status = decode_sequence(xdr, &res->seq_res, rqstp);
6562 if (status)
6563 goto out;
6564 status = decode_putfh(xdr);
6565 if (status)
6566 goto out;
6567 status = decode_read(xdr, rqstp, res);
6568 if (!status)
6569 status = res->count;
6570 out:
6571 return status;
6572 }
6573
6574 /*
6575 * Decode WRITE response
6576 */
6577 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6578 struct nfs_writeres *res)
6579 {
6580 struct compound_hdr hdr;
6581 int status;
6582
6583 status = decode_compound_hdr(xdr, &hdr);
6584 if (status)
6585 goto out;
6586 status = decode_sequence(xdr, &res->seq_res, rqstp);
6587 if (status)
6588 goto out;
6589 status = decode_putfh(xdr);
6590 if (status)
6591 goto out;
6592 status = decode_write(xdr, res);
6593 if (status)
6594 goto out;
6595 if (res->fattr)
6596 decode_getfattr(xdr, res->fattr, res->server);
6597 if (!status)
6598 status = res->count;
6599 out:
6600 return status;
6601 }
6602
6603 /*
6604 * Decode COMMIT response
6605 */
6606 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6607 struct nfs_commitres *res)
6608 {
6609 struct compound_hdr hdr;
6610 int status;
6611
6612 status = decode_compound_hdr(xdr, &hdr);
6613 if (status)
6614 goto out;
6615 status = decode_sequence(xdr, &res->seq_res, rqstp);
6616 if (status)
6617 goto out;
6618 status = decode_putfh(xdr);
6619 if (status)
6620 goto out;
6621 status = decode_commit(xdr, res);
6622 out:
6623 return status;
6624 }
6625
6626 /*
6627 * Decode FSINFO response
6628 */
6629 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6630 struct nfs4_fsinfo_res *res)
6631 {
6632 struct compound_hdr hdr;
6633 int status;
6634
6635 status = decode_compound_hdr(xdr, &hdr);
6636 if (!status)
6637 status = decode_sequence(xdr, &res->seq_res, req);
6638 if (!status)
6639 status = decode_putfh(xdr);
6640 if (!status)
6641 status = decode_fsinfo(xdr, res->fsinfo);
6642 return status;
6643 }
6644
6645 /*
6646 * Decode PATHCONF response
6647 */
6648 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6649 struct nfs4_pathconf_res *res)
6650 {
6651 struct compound_hdr hdr;
6652 int status;
6653
6654 status = decode_compound_hdr(xdr, &hdr);
6655 if (!status)
6656 status = decode_sequence(xdr, &res->seq_res, req);
6657 if (!status)
6658 status = decode_putfh(xdr);
6659 if (!status)
6660 status = decode_pathconf(xdr, res->pathconf);
6661 return status;
6662 }
6663
6664 /*
6665 * Decode STATFS response
6666 */
6667 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6668 struct nfs4_statfs_res *res)
6669 {
6670 struct compound_hdr hdr;
6671 int status;
6672
6673 status = decode_compound_hdr(xdr, &hdr);
6674 if (!status)
6675 status = decode_sequence(xdr, &res->seq_res, req);
6676 if (!status)
6677 status = decode_putfh(xdr);
6678 if (!status)
6679 status = decode_statfs(xdr, res->fsstat);
6680 return status;
6681 }
6682
6683 /*
6684 * Decode GETATTR_BITMAP response
6685 */
6686 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6687 struct xdr_stream *xdr,
6688 struct nfs4_server_caps_res *res)
6689 {
6690 struct compound_hdr hdr;
6691 int status;
6692
6693 status = decode_compound_hdr(xdr, &hdr);
6694 if (status)
6695 goto out;
6696 status = decode_sequence(xdr, &res->seq_res, req);
6697 if (status)
6698 goto out;
6699 status = decode_putfh(xdr);
6700 if (status)
6701 goto out;
6702 status = decode_server_caps(xdr, res);
6703 out:
6704 return status;
6705 }
6706
6707 /*
6708 * Decode RENEW response
6709 */
6710 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6711 void *__unused)
6712 {
6713 struct compound_hdr hdr;
6714 int status;
6715
6716 status = decode_compound_hdr(xdr, &hdr);
6717 if (!status)
6718 status = decode_renew(xdr);
6719 return status;
6720 }
6721
6722 /*
6723 * Decode SETCLIENTID response
6724 */
6725 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6726 struct xdr_stream *xdr,
6727 struct nfs4_setclientid_res *res)
6728 {
6729 struct compound_hdr hdr;
6730 int status;
6731
6732 status = decode_compound_hdr(xdr, &hdr);
6733 if (!status)
6734 status = decode_setclientid(xdr, res);
6735 return status;
6736 }
6737
6738 /*
6739 * Decode SETCLIENTID_CONFIRM response
6740 */
6741 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6742 struct xdr_stream *xdr)
6743 {
6744 struct compound_hdr hdr;
6745 int status;
6746
6747 status = decode_compound_hdr(xdr, &hdr);
6748 if (!status)
6749 status = decode_setclientid_confirm(xdr);
6750 return status;
6751 }
6752
6753 /*
6754 * Decode DELEGRETURN response
6755 */
6756 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6757 struct xdr_stream *xdr,
6758 struct nfs4_delegreturnres *res)
6759 {
6760 struct compound_hdr hdr;
6761 int status;
6762
6763 status = decode_compound_hdr(xdr, &hdr);
6764 if (status)
6765 goto out;
6766 status = decode_sequence(xdr, &res->seq_res, rqstp);
6767 if (status)
6768 goto out;
6769 status = decode_putfh(xdr);
6770 if (status != 0)
6771 goto out;
6772 status = decode_getfattr(xdr, res->fattr, res->server);
6773 if (status != 0)
6774 goto out;
6775 status = decode_delegreturn(xdr);
6776 out:
6777 return status;
6778 }
6779
6780 /*
6781 * Decode FS_LOCATIONS response
6782 */
6783 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6784 struct xdr_stream *xdr,
6785 struct nfs4_fs_locations_res *res)
6786 {
6787 struct compound_hdr hdr;
6788 int status;
6789
6790 status = decode_compound_hdr(xdr, &hdr);
6791 if (status)
6792 goto out;
6793 status = decode_sequence(xdr, &res->seq_res, req);
6794 if (status)
6795 goto out;
6796 status = decode_putfh(xdr);
6797 if (status)
6798 goto out;
6799 status = decode_lookup(xdr);
6800 if (status)
6801 goto out;
6802 xdr_enter_page(xdr, PAGE_SIZE);
6803 status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6804 NULL, res->fs_locations,
6805 NULL, res->fs_locations->server);
6806 out:
6807 return status;
6808 }
6809
6810 /*
6811 * Decode SECINFO response
6812 */
6813 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6814 struct xdr_stream *xdr,
6815 struct nfs4_secinfo_res *res)
6816 {
6817 struct compound_hdr hdr;
6818 int status;
6819
6820 status = decode_compound_hdr(xdr, &hdr);
6821 if (status)
6822 goto out;
6823 status = decode_sequence(xdr, &res->seq_res, rqstp);
6824 if (status)
6825 goto out;
6826 status = decode_putfh(xdr);
6827 if (status)
6828 goto out;
6829 status = decode_secinfo(xdr, res);
6830 out:
6831 return status;
6832 }
6833
6834 #if defined(CONFIG_NFS_V4_1)
6835 /*
6836 * Decode BIND_CONN_TO_SESSION response
6837 */
6838 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6839 struct xdr_stream *xdr,
6840 void *res)
6841 {
6842 struct compound_hdr hdr;
6843 int status;
6844
6845 status = decode_compound_hdr(xdr, &hdr);
6846 if (!status)
6847 status = decode_bind_conn_to_session(xdr, res);
6848 return status;
6849 }
6850
6851 /*
6852 * Decode EXCHANGE_ID response
6853 */
6854 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6855 struct xdr_stream *xdr,
6856 void *res)
6857 {
6858 struct compound_hdr hdr;
6859 int status;
6860
6861 status = decode_compound_hdr(xdr, &hdr);
6862 if (!status)
6863 status = decode_exchange_id(xdr, res);
6864 return status;
6865 }
6866
6867 /*
6868 * Decode CREATE_SESSION response
6869 */
6870 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6871 struct xdr_stream *xdr,
6872 struct nfs41_create_session_res *res)
6873 {
6874 struct compound_hdr hdr;
6875 int status;
6876
6877 status = decode_compound_hdr(xdr, &hdr);
6878 if (!status)
6879 status = decode_create_session(xdr, res);
6880 return status;
6881 }
6882
6883 /*
6884 * Decode DESTROY_SESSION response
6885 */
6886 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6887 struct xdr_stream *xdr,
6888 void *res)
6889 {
6890 struct compound_hdr hdr;
6891 int status;
6892
6893 status = decode_compound_hdr(xdr, &hdr);
6894 if (!status)
6895 status = decode_destroy_session(xdr, res);
6896 return status;
6897 }
6898
6899 /*
6900 * Decode DESTROY_CLIENTID response
6901 */
6902 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6903 struct xdr_stream *xdr,
6904 void *res)
6905 {
6906 struct compound_hdr hdr;
6907 int status;
6908
6909 status = decode_compound_hdr(xdr, &hdr);
6910 if (!status)
6911 status = decode_destroy_clientid(xdr, res);
6912 return status;
6913 }
6914
6915 /*
6916 * Decode SEQUENCE response
6917 */
6918 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6919 struct xdr_stream *xdr,
6920 struct nfs4_sequence_res *res)
6921 {
6922 struct compound_hdr hdr;
6923 int status;
6924
6925 status = decode_compound_hdr(xdr, &hdr);
6926 if (!status)
6927 status = decode_sequence(xdr, res, rqstp);
6928 return status;
6929 }
6930
6931 /*
6932 * Decode GET_LEASE_TIME response
6933 */
6934 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6935 struct xdr_stream *xdr,
6936 struct nfs4_get_lease_time_res *res)
6937 {
6938 struct compound_hdr hdr;
6939 int status;
6940
6941 status = decode_compound_hdr(xdr, &hdr);
6942 if (!status)
6943 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6944 if (!status)
6945 status = decode_putrootfh(xdr);
6946 if (!status)
6947 status = decode_fsinfo(xdr, res->lr_fsinfo);
6948 return status;
6949 }
6950
6951 /*
6952 * Decode RECLAIM_COMPLETE response
6953 */
6954 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6955 struct xdr_stream *xdr,
6956 struct nfs41_reclaim_complete_res *res)
6957 {
6958 struct compound_hdr hdr;
6959 int status;
6960
6961 status = decode_compound_hdr(xdr, &hdr);
6962 if (!status)
6963 status = decode_sequence(xdr, &res->seq_res, rqstp);
6964 if (!status)
6965 status = decode_reclaim_complete(xdr, (void *)NULL);
6966 return status;
6967 }
6968
6969 /*
6970 * Decode GETDEVICELIST response
6971 */
6972 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6973 struct xdr_stream *xdr,
6974 struct nfs4_getdevicelist_res *res)
6975 {
6976 struct compound_hdr hdr;
6977 int status;
6978
6979 dprintk("encoding getdevicelist!\n");
6980
6981 status = decode_compound_hdr(xdr, &hdr);
6982 if (status != 0)
6983 goto out;
6984 status = decode_sequence(xdr, &res->seq_res, rqstp);
6985 if (status != 0)
6986 goto out;
6987 status = decode_putfh(xdr);
6988 if (status != 0)
6989 goto out;
6990 status = decode_getdevicelist(xdr, res->devlist);
6991 out:
6992 return status;
6993 }
6994
6995 /*
6996 * Decode GETDEVINFO response
6997 */
6998 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6999 struct xdr_stream *xdr,
7000 struct nfs4_getdeviceinfo_res *res)
7001 {
7002 struct compound_hdr hdr;
7003 int status;
7004
7005 status = decode_compound_hdr(xdr, &hdr);
7006 if (status != 0)
7007 goto out;
7008 status = decode_sequence(xdr, &res->seq_res, rqstp);
7009 if (status != 0)
7010 goto out;
7011 status = decode_getdeviceinfo(xdr, res->pdev);
7012 out:
7013 return status;
7014 }
7015
7016 /*
7017 * Decode LAYOUTGET response
7018 */
7019 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7020 struct xdr_stream *xdr,
7021 struct nfs4_layoutget_res *res)
7022 {
7023 struct compound_hdr hdr;
7024 int status;
7025
7026 status = decode_compound_hdr(xdr, &hdr);
7027 if (status)
7028 goto out;
7029 status = decode_sequence(xdr, &res->seq_res, rqstp);
7030 if (status)
7031 goto out;
7032 status = decode_putfh(xdr);
7033 if (status)
7034 goto out;
7035 status = decode_layoutget(xdr, rqstp, res);
7036 out:
7037 return status;
7038 }
7039
7040 /*
7041 * Decode LAYOUTRETURN response
7042 */
7043 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7044 struct xdr_stream *xdr,
7045 struct nfs4_layoutreturn_res *res)
7046 {
7047 struct compound_hdr hdr;
7048 int status;
7049
7050 status = decode_compound_hdr(xdr, &hdr);
7051 if (status)
7052 goto out;
7053 status = decode_sequence(xdr, &res->seq_res, rqstp);
7054 if (status)
7055 goto out;
7056 status = decode_putfh(xdr);
7057 if (status)
7058 goto out;
7059 status = decode_layoutreturn(xdr, res);
7060 out:
7061 return status;
7062 }
7063
7064 /*
7065 * Decode LAYOUTCOMMIT response
7066 */
7067 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7068 struct xdr_stream *xdr,
7069 struct nfs4_layoutcommit_res *res)
7070 {
7071 struct compound_hdr hdr;
7072 int status;
7073
7074 status = decode_compound_hdr(xdr, &hdr);
7075 if (status)
7076 goto out;
7077 status = decode_sequence(xdr, &res->seq_res, rqstp);
7078 if (status)
7079 goto out;
7080 status = decode_putfh(xdr);
7081 if (status)
7082 goto out;
7083 status = decode_layoutcommit(xdr, rqstp, res);
7084 if (status)
7085 goto out;
7086 decode_getfattr(xdr, res->fattr, res->server);
7087 out:
7088 return status;
7089 }
7090
7091 /*
7092 * Decode SECINFO_NO_NAME response
7093 */
7094 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7095 struct xdr_stream *xdr,
7096 struct nfs4_secinfo_res *res)
7097 {
7098 struct compound_hdr hdr;
7099 int status;
7100
7101 status = decode_compound_hdr(xdr, &hdr);
7102 if (status)
7103 goto out;
7104 status = decode_sequence(xdr, &res->seq_res, rqstp);
7105 if (status)
7106 goto out;
7107 status = decode_putrootfh(xdr);
7108 if (status)
7109 goto out;
7110 status = decode_secinfo_no_name(xdr, res);
7111 out:
7112 return status;
7113 }
7114
7115 /*
7116 * Decode TEST_STATEID response
7117 */
7118 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 struct nfs41_test_stateid_res *res)
7121 {
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (status)
7127 goto out;
7128 status = decode_sequence(xdr, &res->seq_res, rqstp);
7129 if (status)
7130 goto out;
7131 status = decode_test_stateid(xdr, res);
7132 out:
7133 return status;
7134 }
7135
7136 /*
7137 * Decode FREE_STATEID response
7138 */
7139 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7140 struct xdr_stream *xdr,
7141 struct nfs41_free_stateid_res *res)
7142 {
7143 struct compound_hdr hdr;
7144 int status;
7145
7146 status = decode_compound_hdr(xdr, &hdr);
7147 if (status)
7148 goto out;
7149 status = decode_sequence(xdr, &res->seq_res, rqstp);
7150 if (status)
7151 goto out;
7152 status = decode_free_stateid(xdr, res);
7153 out:
7154 return status;
7155 }
7156 #endif /* CONFIG_NFS_V4_1 */
7157
7158 /**
7159 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7160 * the local page cache.
7161 * @xdr: XDR stream where entry resides
7162 * @entry: buffer to fill in with entry data
7163 * @plus: boolean indicating whether this should be a readdirplus entry
7164 *
7165 * Returns zero if successful, otherwise a negative errno value is
7166 * returned.
7167 *
7168 * This function is not invoked during READDIR reply decoding, but
7169 * rather whenever an application invokes the getdents(2) system call
7170 * on a directory already in our cache.
7171 */
7172 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7173 int plus)
7174 {
7175 unsigned int savep;
7176 uint32_t bitmap[3] = {0};
7177 uint32_t len;
7178 __be32 *p = xdr_inline_decode(xdr, 4);
7179 if (unlikely(!p))
7180 goto out_overflow;
7181 if (*p == xdr_zero) {
7182 p = xdr_inline_decode(xdr, 4);
7183 if (unlikely(!p))
7184 goto out_overflow;
7185 if (*p == xdr_zero)
7186 return -EAGAIN;
7187 entry->eof = 1;
7188 return -EBADCOOKIE;
7189 }
7190
7191 p = xdr_inline_decode(xdr, 12);
7192 if (unlikely(!p))
7193 goto out_overflow;
7194 entry->prev_cookie = entry->cookie;
7195 p = xdr_decode_hyper(p, &entry->cookie);
7196 entry->len = be32_to_cpup(p);
7197
7198 p = xdr_inline_decode(xdr, entry->len);
7199 if (unlikely(!p))
7200 goto out_overflow;
7201 entry->name = (const char *) p;
7202
7203 /*
7204 * In case the server doesn't return an inode number,
7205 * we fake one here. (We don't use inode number 0,
7206 * since glibc seems to choke on it...)
7207 */
7208 entry->ino = 1;
7209 entry->fattr->valid = 0;
7210
7211 if (decode_attr_bitmap(xdr, bitmap) < 0)
7212 goto out_overflow;
7213
7214 if (decode_attr_length(xdr, &len, &savep) < 0)
7215 goto out_overflow;
7216
7217 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7218 NULL, entry->label, entry->server) < 0)
7219 goto out_overflow;
7220 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7221 entry->ino = entry->fattr->mounted_on_fileid;
7222 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7223 entry->ino = entry->fattr->fileid;
7224
7225 entry->d_type = DT_UNKNOWN;
7226 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7227 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7228
7229 return 0;
7230
7231 out_overflow:
7232 print_overflow_msg(__func__, xdr);
7233 return -EAGAIN;
7234 }
7235
7236 /*
7237 * We need to translate between nfs status return values and
7238 * the local errno values which may not be the same.
7239 */
7240 static struct {
7241 int stat;
7242 int errno;
7243 } nfs_errtbl[] = {
7244 { NFS4_OK, 0 },
7245 { NFS4ERR_PERM, -EPERM },
7246 { NFS4ERR_NOENT, -ENOENT },
7247 { NFS4ERR_IO, -errno_NFSERR_IO},
7248 { NFS4ERR_NXIO, -ENXIO },
7249 { NFS4ERR_ACCESS, -EACCES },
7250 { NFS4ERR_EXIST, -EEXIST },
7251 { NFS4ERR_XDEV, -EXDEV },
7252 { NFS4ERR_NOTDIR, -ENOTDIR },
7253 { NFS4ERR_ISDIR, -EISDIR },
7254 { NFS4ERR_INVAL, -EINVAL },
7255 { NFS4ERR_FBIG, -EFBIG },
7256 { NFS4ERR_NOSPC, -ENOSPC },
7257 { NFS4ERR_ROFS, -EROFS },
7258 { NFS4ERR_MLINK, -EMLINK },
7259 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7260 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7261 { NFS4ERR_DQUOT, -EDQUOT },
7262 { NFS4ERR_STALE, -ESTALE },
7263 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7264 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7265 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7266 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7267 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7268 { NFS4ERR_BADTYPE, -EBADTYPE },
7269 { NFS4ERR_LOCKED, -EAGAIN },
7270 { NFS4ERR_SYMLINK, -ELOOP },
7271 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7272 { NFS4ERR_DEADLOCK, -EDEADLK },
7273 { -1, -EIO }
7274 };
7275
7276 /*
7277 * Convert an NFS error code to a local one.
7278 * This one is used jointly by NFSv2 and NFSv3.
7279 */
7280 static int
7281 nfs4_stat_to_errno(int stat)
7282 {
7283 int i;
7284 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7285 if (nfs_errtbl[i].stat == stat)
7286 return nfs_errtbl[i].errno;
7287 }
7288 if (stat <= 10000 || stat > 10100) {
7289 /* The server is looney tunes. */
7290 return -EREMOTEIO;
7291 }
7292 /* If we cannot translate the error, the recovery routines should
7293 * handle it.
7294 * Note: remaining NFSv4 error codes have values > 10000, so should
7295 * not conflict with native Linux error codes.
7296 */
7297 return -stat;
7298 }
7299
7300 #define PROC(proc, argtype, restype) \
7301 [NFSPROC4_CLNT_##proc] = { \
7302 .p_proc = NFSPROC4_COMPOUND, \
7303 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7304 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7305 .p_arglen = NFS4_##argtype##_sz, \
7306 .p_replen = NFS4_##restype##_sz, \
7307 .p_statidx = NFSPROC4_CLNT_##proc, \
7308 .p_name = #proc, \
7309 }
7310
7311 struct rpc_procinfo nfs4_procedures[] = {
7312 PROC(READ, enc_read, dec_read),
7313 PROC(WRITE, enc_write, dec_write),
7314 PROC(COMMIT, enc_commit, dec_commit),
7315 PROC(OPEN, enc_open, dec_open),
7316 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7317 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7318 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7319 PROC(CLOSE, enc_close, dec_close),
7320 PROC(SETATTR, enc_setattr, dec_setattr),
7321 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7322 PROC(RENEW, enc_renew, dec_renew),
7323 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7324 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7325 PROC(LOCK, enc_lock, dec_lock),
7326 PROC(LOCKT, enc_lockt, dec_lockt),
7327 PROC(LOCKU, enc_locku, dec_locku),
7328 PROC(ACCESS, enc_access, dec_access),
7329 PROC(GETATTR, enc_getattr, dec_getattr),
7330 PROC(LOOKUP, enc_lookup, dec_lookup),
7331 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7332 PROC(REMOVE, enc_remove, dec_remove),
7333 PROC(RENAME, enc_rename, dec_rename),
7334 PROC(LINK, enc_link, dec_link),
7335 PROC(SYMLINK, enc_symlink, dec_symlink),
7336 PROC(CREATE, enc_create, dec_create),
7337 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7338 PROC(STATFS, enc_statfs, dec_statfs),
7339 PROC(READLINK, enc_readlink, dec_readlink),
7340 PROC(READDIR, enc_readdir, dec_readdir),
7341 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7342 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7343 PROC(GETACL, enc_getacl, dec_getacl),
7344 PROC(SETACL, enc_setacl, dec_setacl),
7345 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7346 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7347 PROC(SECINFO, enc_secinfo, dec_secinfo),
7348 #if defined(CONFIG_NFS_V4_1)
7349 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7350 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7351 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7352 PROC(SEQUENCE, enc_sequence, dec_sequence),
7353 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7354 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7355 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7356 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7357 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7358 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7359 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7360 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7361 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7362 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7363 PROC(BIND_CONN_TO_SESSION,
7364 enc_bind_conn_to_session, dec_bind_conn_to_session),
7365 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7366 #endif /* CONFIG_NFS_V4_1 */
7367 };
7368
7369 const struct rpc_version nfs_version4 = {
7370 .number = 4,
7371 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7372 .procs = nfs4_procedures
7373 };
7374
7375 /*
7376 * Local variables:
7377 * c-basic-offset: 8
7378 * End:
7379 */
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