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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #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 /* max is SP4_MACH_CRED (for now) */ + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 + NFS4_OP_MAP_NUM_WORDS + \
300 1 /* implementation id array of size 1 */ + \
301 1 /* nii_domain */ + \
302 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303 1 /* nii_name */ + \
304 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
305 3 /* nii_date */)
306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
307 2 /* eir_clientid */ + \
308 1 /* eir_sequenceid */ + \
309 1 /* eir_flags */ + \
310 1 /* spr_how */ + \
311 /* max is SP4_MACH_CRED (for now) */ + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 + NFS4_OP_MAP_NUM_WORDS + \
314 2 /* eir_server_owner.so_minor_id */ + \
315 /* eir_server_owner.so_major_id<> */ \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
317 /* eir_server_scope<> */ \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319 1 /* eir_server_impl_id array length */ + \
320 1 /* nii_domain */ + \
321 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
322 1 /* nii_name */ + \
323 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 3 /* nii_date */)
325 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
326 #define decode_channel_attrs_maxsz (6 + \
327 1 /* ca_rdma_ird.len */ + \
328 1 /* ca_rdma_ird */)
329 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
330 2 /* csa_clientid */ + \
331 1 /* csa_sequence */ + \
332 1 /* csa_flags */ + \
333 encode_channel_attrs_maxsz + \
334 encode_channel_attrs_maxsz + \
335 1 /* csa_cb_program */ + \
336 1 /* csa_sec_parms.len (1) */ + \
337 1 /* cb_secflavor (AUTH_SYS) */ + \
338 1 /* stamp */ + \
339 1 /* machinename.len */ + \
340 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
341 1 /* uid */ + \
342 1 /* gid */ + \
343 1 /* gids.len (0) */)
344 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
345 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
346 1 /* csr_sequence */ + \
347 1 /* csr_flags */ + \
348 decode_channel_attrs_maxsz + \
349 decode_channel_attrs_maxsz)
350 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
351 /* bctsa_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsa_dir */ + \
354 1 /* bctsa_use_conn_in_rdma_mode */)
355 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
356 /* bctsr_sessid */ \
357 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 1 /* bctsr_dir */ + \
359 1 /* bctsr_use_conn_in_rdma_mode */)
360 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
361 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
362 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
363 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
364 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
366 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
367 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
368 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
369 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
370 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
371 encode_verifier_maxsz)
372 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
373 2 /* nfs_cookie4 gdlr_cookie */ + \
374 decode_verifier_maxsz \
375 /* verifier4 gdlr_verifier */ + \
376 1 /* gdlr_deviceid_list count */ + \
377 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
378 NFS4_DEVICEID4_SIZE) \
379 /* gdlr_deviceid_list */ + \
380 1 /* bool gdlr_eof */)
381 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
382 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
383 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
384 1 /* layout type */ + \
385 1 /* opaque devaddr4 length */ + \
386 /* devaddr4 payload is read into page */ \
387 1 /* notification bitmap length */ + \
388 1 /* notification bitmap */)
389 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
390 encode_stateid_maxsz)
391 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
392 decode_stateid_maxsz + \
393 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
394 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
395 2 /* offset */ + \
396 2 /* length */ + \
397 1 /* reclaim */ + \
398 encode_stateid_maxsz + \
399 1 /* new offset (true) */ + \
400 2 /* last byte written */ + \
401 1 /* nt_timechanged (false) */ + \
402 1 /* layoutupdate4 layout type */ + \
403 1 /* NULL filelayout layoutupdate4 payload */)
404 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
405 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
406 encode_stateid_maxsz + \
407 1 /* FIXME: opaque lrf_body always empty at the moment */)
408 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
409 1 + decode_stateid_maxsz)
410 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
411 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
412 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
413 XDR_QUADLEN(NFS4_STATEID_SIZE))
414 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
415 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
416 XDR_QUADLEN(NFS4_STATEID_SIZE))
417 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
418 #else /* CONFIG_NFS_V4_1 */
419 #define encode_sequence_maxsz 0
420 #define decode_sequence_maxsz 0
421 #endif /* CONFIG_NFS_V4_1 */
422
423 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
424 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
425 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_read_maxsz)
429 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_read_maxsz)
433 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_readlink_maxsz)
437 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_readlink_maxsz)
441 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_readdir_maxsz)
445 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_readdir_maxsz)
449 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_write_maxsz + \
453 encode_getattr_maxsz)
454 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
455 decode_sequence_maxsz + \
456 decode_putfh_maxsz + \
457 decode_write_maxsz + \
458 decode_getattr_maxsz)
459 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_commit_maxsz)
463 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_commit_maxsz)
467 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
468 encode_sequence_maxsz + \
469 encode_putfh_maxsz + \
470 encode_open_maxsz + \
471 encode_access_maxsz + \
472 encode_getfh_maxsz + \
473 encode_getattr_maxsz)
474 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
475 decode_sequence_maxsz + \
476 decode_putfh_maxsz + \
477 decode_open_maxsz + \
478 decode_access_maxsz + \
479 decode_getfh_maxsz + \
480 decode_getattr_maxsz)
481 #define NFS4_enc_open_confirm_sz \
482 (compound_encode_hdr_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_confirm_maxsz)
485 #define NFS4_dec_open_confirm_sz \
486 (compound_decode_hdr_maxsz + \
487 decode_putfh_maxsz + \
488 decode_open_confirm_maxsz)
489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_open_maxsz + \
493 encode_access_maxsz + \
494 encode_getattr_maxsz)
495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
496 decode_sequence_maxsz + \
497 decode_putfh_maxsz + \
498 decode_open_maxsz + \
499 decode_access_maxsz + \
500 decode_getattr_maxsz)
501 #define NFS4_enc_open_downgrade_sz \
502 (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_open_downgrade_maxsz + \
506 encode_getattr_maxsz)
507 #define NFS4_dec_open_downgrade_sz \
508 (compound_decode_hdr_maxsz + \
509 decode_sequence_maxsz + \
510 decode_putfh_maxsz + \
511 decode_open_downgrade_maxsz + \
512 decode_getattr_maxsz)
513 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
514 encode_sequence_maxsz + \
515 encode_putfh_maxsz + \
516 encode_close_maxsz + \
517 encode_getattr_maxsz)
518 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
519 decode_sequence_maxsz + \
520 decode_putfh_maxsz + \
521 decode_close_maxsz + \
522 decode_getattr_maxsz)
523 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
524 encode_sequence_maxsz + \
525 encode_putfh_maxsz + \
526 encode_setattr_maxsz + \
527 encode_getattr_maxsz)
528 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
529 decode_sequence_maxsz + \
530 decode_putfh_maxsz + \
531 decode_setattr_maxsz + \
532 decode_getattr_maxsz)
533 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
534 encode_sequence_maxsz + \
535 encode_putfh_maxsz + \
536 encode_fsinfo_maxsz)
537 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
538 decode_sequence_maxsz + \
539 decode_putfh_maxsz + \
540 decode_fsinfo_maxsz)
541 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
542 encode_renew_maxsz)
543 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
544 decode_renew_maxsz)
545 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
546 encode_setclientid_maxsz)
547 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
548 decode_setclientid_maxsz)
549 #define NFS4_enc_setclientid_confirm_sz \
550 (compound_encode_hdr_maxsz + \
551 encode_setclientid_confirm_maxsz)
552 #define NFS4_dec_setclientid_confirm_sz \
553 (compound_decode_hdr_maxsz + \
554 decode_setclientid_confirm_maxsz)
555 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_lock_maxsz)
559 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
560 decode_sequence_maxsz + \
561 decode_putfh_maxsz + \
562 decode_lock_maxsz)
563 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
564 encode_sequence_maxsz + \
565 encode_putfh_maxsz + \
566 encode_lockt_maxsz)
567 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
568 decode_sequence_maxsz + \
569 decode_putfh_maxsz + \
570 decode_lockt_maxsz)
571 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
572 encode_sequence_maxsz + \
573 encode_putfh_maxsz + \
574 encode_locku_maxsz)
575 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
576 decode_sequence_maxsz + \
577 decode_putfh_maxsz + \
578 decode_locku_maxsz)
579 #define NFS4_enc_release_lockowner_sz \
580 (compound_encode_hdr_maxsz + \
581 encode_lockowner_maxsz)
582 #define NFS4_dec_release_lockowner_sz \
583 (compound_decode_hdr_maxsz + \
584 decode_lockowner_maxsz)
585 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_access_maxsz + \
589 encode_getattr_maxsz)
590 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
591 decode_sequence_maxsz + \
592 decode_putfh_maxsz + \
593 decode_access_maxsz + \
594 decode_getattr_maxsz)
595 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
596 encode_sequence_maxsz + \
597 encode_putfh_maxsz + \
598 encode_getattr_maxsz)
599 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
600 decode_sequence_maxsz + \
601 decode_putfh_maxsz + \
602 decode_getattr_maxsz)
603 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
604 encode_sequence_maxsz + \
605 encode_putfh_maxsz + \
606 encode_lookup_maxsz + \
607 encode_getattr_maxsz + \
608 encode_getfh_maxsz)
609 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
610 decode_sequence_maxsz + \
611 decode_putfh_maxsz + \
612 decode_lookup_maxsz + \
613 decode_getattr_maxsz + \
614 decode_getfh_maxsz)
615 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
616 encode_sequence_maxsz + \
617 encode_putrootfh_maxsz + \
618 encode_getattr_maxsz + \
619 encode_getfh_maxsz)
620 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
621 decode_sequence_maxsz + \
622 decode_putrootfh_maxsz + \
623 decode_getattr_maxsz + \
624 decode_getfh_maxsz)
625 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
626 encode_sequence_maxsz + \
627 encode_putfh_maxsz + \
628 encode_remove_maxsz)
629 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
630 decode_sequence_maxsz + \
631 decode_putfh_maxsz + \
632 decode_remove_maxsz)
633 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
634 encode_sequence_maxsz + \
635 encode_putfh_maxsz + \
636 encode_savefh_maxsz + \
637 encode_putfh_maxsz + \
638 encode_rename_maxsz)
639 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
640 decode_sequence_maxsz + \
641 decode_putfh_maxsz + \
642 decode_savefh_maxsz + \
643 decode_putfh_maxsz + \
644 decode_rename_maxsz)
645 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
646 encode_sequence_maxsz + \
647 encode_putfh_maxsz + \
648 encode_savefh_maxsz + \
649 encode_putfh_maxsz + \
650 encode_link_maxsz + \
651 encode_restorefh_maxsz + \
652 encode_getattr_maxsz)
653 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
654 decode_sequence_maxsz + \
655 decode_putfh_maxsz + \
656 decode_savefh_maxsz + \
657 decode_putfh_maxsz + \
658 decode_link_maxsz + \
659 decode_restorefh_maxsz + \
660 decode_getattr_maxsz)
661 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
662 encode_sequence_maxsz + \
663 encode_putfh_maxsz + \
664 encode_symlink_maxsz + \
665 encode_getattr_maxsz + \
666 encode_getfh_maxsz)
667 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
668 decode_sequence_maxsz + \
669 decode_putfh_maxsz + \
670 decode_symlink_maxsz + \
671 decode_getattr_maxsz + \
672 decode_getfh_maxsz)
673 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
674 encode_sequence_maxsz + \
675 encode_putfh_maxsz + \
676 encode_create_maxsz + \
677 encode_getfh_maxsz + \
678 encode_getattr_maxsz)
679 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
680 decode_sequence_maxsz + \
681 decode_putfh_maxsz + \
682 decode_create_maxsz + \
683 decode_getfh_maxsz + \
684 decode_getattr_maxsz)
685 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
686 encode_sequence_maxsz + \
687 encode_putfh_maxsz + \
688 encode_getattr_maxsz)
689 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_getattr_maxsz)
693 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
694 encode_sequence_maxsz + \
695 encode_putfh_maxsz + \
696 encode_statfs_maxsz)
697 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
698 decode_sequence_maxsz + \
699 decode_putfh_maxsz + \
700 decode_statfs_maxsz)
701 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
702 encode_sequence_maxsz + \
703 encode_putfh_maxsz + \
704 encode_getattr_maxsz)
705 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
706 decode_sequence_maxsz + \
707 decode_putfh_maxsz + \
708 decode_getattr_maxsz)
709 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
710 encode_sequence_maxsz + \
711 encode_putfh_maxsz + \
712 encode_delegreturn_maxsz + \
713 encode_getattr_maxsz)
714 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
715 decode_sequence_maxsz + \
716 decode_delegreturn_maxsz + \
717 decode_getattr_maxsz)
718 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
719 encode_sequence_maxsz + \
720 encode_putfh_maxsz + \
721 encode_getacl_maxsz)
722 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
723 decode_sequence_maxsz + \
724 decode_putfh_maxsz + \
725 decode_getacl_maxsz)
726 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
727 encode_sequence_maxsz + \
728 encode_putfh_maxsz + \
729 encode_setacl_maxsz)
730 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
731 decode_sequence_maxsz + \
732 decode_putfh_maxsz + \
733 decode_setacl_maxsz)
734 #define NFS4_enc_fs_locations_sz \
735 (compound_encode_hdr_maxsz + \
736 encode_sequence_maxsz + \
737 encode_putfh_maxsz + \
738 encode_lookup_maxsz + \
739 encode_fs_locations_maxsz)
740 #define NFS4_dec_fs_locations_sz \
741 (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_lookup_maxsz + \
745 decode_fs_locations_maxsz)
746 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
747 encode_sequence_maxsz + \
748 encode_putfh_maxsz + \
749 encode_secinfo_maxsz)
750 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
751 decode_sequence_maxsz + \
752 decode_putfh_maxsz + \
753 decode_secinfo_maxsz)
754 #if defined(CONFIG_NFS_V4_1)
755 #define NFS4_enc_bind_conn_to_session_sz \
756 (compound_encode_hdr_maxsz + \
757 encode_bind_conn_to_session_maxsz)
758 #define NFS4_dec_bind_conn_to_session_sz \
759 (compound_decode_hdr_maxsz + \
760 decode_bind_conn_to_session_maxsz)
761 #define NFS4_enc_exchange_id_sz \
762 (compound_encode_hdr_maxsz + \
763 encode_exchange_id_maxsz)
764 #define NFS4_dec_exchange_id_sz \
765 (compound_decode_hdr_maxsz + \
766 decode_exchange_id_maxsz)
767 #define NFS4_enc_create_session_sz \
768 (compound_encode_hdr_maxsz + \
769 encode_create_session_maxsz)
770 #define NFS4_dec_create_session_sz \
771 (compound_decode_hdr_maxsz + \
772 decode_create_session_maxsz)
773 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
774 encode_destroy_session_maxsz)
775 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
776 decode_destroy_session_maxsz)
777 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
778 encode_destroy_clientid_maxsz)
779 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
780 decode_destroy_clientid_maxsz)
781 #define NFS4_enc_sequence_sz \
782 (compound_decode_hdr_maxsz + \
783 encode_sequence_maxsz)
784 #define NFS4_dec_sequence_sz \
785 (compound_decode_hdr_maxsz + \
786 decode_sequence_maxsz)
787 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
788 encode_sequence_maxsz + \
789 encode_putrootfh_maxsz + \
790 encode_fsinfo_maxsz)
791 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
792 decode_sequence_maxsz + \
793 decode_putrootfh_maxsz + \
794 decode_fsinfo_maxsz)
795 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
796 encode_sequence_maxsz + \
797 encode_reclaim_complete_maxsz)
798 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
799 decode_sequence_maxsz + \
800 decode_reclaim_complete_maxsz)
801 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
802 encode_sequence_maxsz + \
803 encode_putfh_maxsz + \
804 encode_getdevicelist_maxsz)
805 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
806 decode_sequence_maxsz + \
807 decode_putfh_maxsz + \
808 decode_getdevicelist_maxsz)
809 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
810 encode_sequence_maxsz +\
811 encode_getdeviceinfo_maxsz)
812 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
813 decode_sequence_maxsz + \
814 decode_getdeviceinfo_maxsz)
815 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
816 encode_sequence_maxsz + \
817 encode_putfh_maxsz + \
818 encode_layoutget_maxsz)
819 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
820 decode_sequence_maxsz + \
821 decode_putfh_maxsz + \
822 decode_layoutget_maxsz)
823 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
824 encode_sequence_maxsz +\
825 encode_putfh_maxsz + \
826 encode_layoutcommit_maxsz + \
827 encode_getattr_maxsz)
828 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
829 decode_sequence_maxsz + \
830 decode_putfh_maxsz + \
831 decode_layoutcommit_maxsz + \
832 decode_getattr_maxsz)
833 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
834 encode_sequence_maxsz + \
835 encode_putfh_maxsz + \
836 encode_layoutreturn_maxsz)
837 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
838 decode_sequence_maxsz + \
839 decode_putfh_maxsz + \
840 decode_layoutreturn_maxsz)
841 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
842 encode_sequence_maxsz + \
843 encode_putrootfh_maxsz +\
844 encode_secinfo_no_name_maxsz)
845 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
846 decode_sequence_maxsz + \
847 decode_putrootfh_maxsz + \
848 decode_secinfo_no_name_maxsz)
849 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
850 encode_sequence_maxsz + \
851 encode_test_stateid_maxsz)
852 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
853 decode_sequence_maxsz + \
854 decode_test_stateid_maxsz)
855 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
856 encode_sequence_maxsz + \
857 encode_free_stateid_maxsz)
858 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
859 decode_sequence_maxsz + \
860 decode_free_stateid_maxsz)
861
862 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
863 compound_encode_hdr_maxsz +
864 encode_sequence_maxsz +
865 encode_putfh_maxsz +
866 encode_getattr_maxsz) *
867 XDR_UNIT);
868
869 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
870 compound_decode_hdr_maxsz +
871 decode_sequence_maxsz +
872 decode_putfh_maxsz) *
873 XDR_UNIT);
874
875 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
876 compound_decode_hdr_maxsz +
877 decode_sequence_maxsz) *
878 XDR_UNIT);
879 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
880 #endif /* CONFIG_NFS_V4_1 */
881
882 static const umode_t nfs_type2fmt[] = {
883 [NF4BAD] = 0,
884 [NF4REG] = S_IFREG,
885 [NF4DIR] = S_IFDIR,
886 [NF4BLK] = S_IFBLK,
887 [NF4CHR] = S_IFCHR,
888 [NF4LNK] = S_IFLNK,
889 [NF4SOCK] = S_IFSOCK,
890 [NF4FIFO] = S_IFIFO,
891 [NF4ATTRDIR] = 0,
892 [NF4NAMEDATTR] = 0,
893 };
894
895 struct compound_hdr {
896 int32_t status;
897 uint32_t nops;
898 __be32 * nops_p;
899 uint32_t taglen;
900 char * tag;
901 uint32_t replen; /* expected reply words */
902 u32 minorversion;
903 };
904
905 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
906 {
907 __be32 *p = xdr_reserve_space(xdr, nbytes);
908 BUG_ON(!p);
909 return p;
910 }
911
912 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
913 {
914 __be32 *p;
915
916 p = xdr_reserve_space(xdr, len);
917 xdr_encode_opaque_fixed(p, buf, len);
918 }
919
920 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
921 {
922 __be32 *p;
923
924 p = reserve_space(xdr, 4 + len);
925 xdr_encode_opaque(p, str, len);
926 }
927
928 static void encode_uint32(struct xdr_stream *xdr, u32 n)
929 {
930 __be32 *p;
931
932 p = reserve_space(xdr, 4);
933 *p = cpu_to_be32(n);
934 }
935
936 static void encode_uint64(struct xdr_stream *xdr, u64 n)
937 {
938 __be32 *p;
939
940 p = reserve_space(xdr, 8);
941 xdr_encode_hyper(p, n);
942 }
943
944 static void encode_nfs4_seqid(struct xdr_stream *xdr,
945 const struct nfs_seqid *seqid)
946 {
947 encode_uint32(xdr, seqid->sequence->counter);
948 }
949
950 static void encode_compound_hdr(struct xdr_stream *xdr,
951 struct rpc_rqst *req,
952 struct compound_hdr *hdr)
953 {
954 __be32 *p;
955 struct rpc_auth *auth = req->rq_cred->cr_auth;
956
957 /* initialize running count of expected bytes in reply.
958 * NOTE: the replied tag SHOULD be the same is the one sent,
959 * but this is not required as a MUST for the server to do so. */
960 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
961
962 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
963 encode_string(xdr, hdr->taglen, hdr->tag);
964 p = reserve_space(xdr, 8);
965 *p++ = cpu_to_be32(hdr->minorversion);
966 hdr->nops_p = p;
967 *p = cpu_to_be32(hdr->nops);
968 }
969
970 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
971 uint32_t replen,
972 struct compound_hdr *hdr)
973 {
974 encode_uint32(xdr, op);
975 hdr->nops++;
976 hdr->replen += replen;
977 }
978
979 static void encode_nops(struct compound_hdr *hdr)
980 {
981 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
982 *hdr->nops_p = htonl(hdr->nops);
983 }
984
985 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
986 {
987 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
988 }
989
990 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
991 {
992 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
993 }
994
995 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
996 const struct nfs4_label *label,
997 const struct nfs_server *server)
998 {
999 char owner_name[IDMAP_NAMESZ];
1000 char owner_group[IDMAP_NAMESZ];
1001 int owner_namelen = 0;
1002 int owner_grouplen = 0;
1003 __be32 *p;
1004 unsigned i;
1005 uint32_t len = 0;
1006 uint32_t bmval_len;
1007 uint32_t bmval[3] = { 0 };
1008
1009 /*
1010 * We reserve enough space to write the entire attribute buffer at once.
1011 * In the worst-case, this would be
1012 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1013 * = 40 bytes, plus any contribution from variable-length fields
1014 * such as owner/group.
1015 */
1016 if (iap->ia_valid & ATTR_SIZE) {
1017 bmval[0] |= FATTR4_WORD0_SIZE;
1018 len += 8;
1019 }
1020 if (iap->ia_valid & ATTR_MODE) {
1021 bmval[1] |= FATTR4_WORD1_MODE;
1022 len += 4;
1023 }
1024 if (iap->ia_valid & ATTR_UID) {
1025 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1026 if (owner_namelen < 0) {
1027 dprintk("nfs: couldn't resolve uid %d to string\n",
1028 from_kuid(&init_user_ns, iap->ia_uid));
1029 /* XXX */
1030 strcpy(owner_name, "nobody");
1031 owner_namelen = sizeof("nobody") - 1;
1032 /* goto out; */
1033 }
1034 bmval[1] |= FATTR4_WORD1_OWNER;
1035 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1036 }
1037 if (iap->ia_valid & ATTR_GID) {
1038 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1039 if (owner_grouplen < 0) {
1040 dprintk("nfs: couldn't resolve gid %d to string\n",
1041 from_kgid(&init_user_ns, iap->ia_gid));
1042 strcpy(owner_group, "nobody");
1043 owner_grouplen = sizeof("nobody") - 1;
1044 /* goto out; */
1045 }
1046 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1047 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1048 }
1049 if (iap->ia_valid & ATTR_ATIME_SET) {
1050 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1051 len += 16;
1052 } else if (iap->ia_valid & ATTR_ATIME) {
1053 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1054 len += 4;
1055 }
1056 if (iap->ia_valid & ATTR_MTIME_SET) {
1057 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1058 len += 16;
1059 } else if (iap->ia_valid & ATTR_MTIME) {
1060 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1061 len += 4;
1062 }
1063 if (label) {
1064 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066 }
1067
1068 if (bmval[2] != 0)
1069 bmval_len = 3;
1070 else if (bmval[1] != 0)
1071 bmval_len = 2;
1072 else
1073 bmval_len = 1;
1074
1075 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1076
1077 *p++ = cpu_to_be32(bmval_len);
1078 for (i = 0; i < bmval_len; i++)
1079 *p++ = cpu_to_be32(bmval[i]);
1080 *p++ = cpu_to_be32(len);
1081
1082 if (bmval[0] & FATTR4_WORD0_SIZE)
1083 p = xdr_encode_hyper(p, iap->ia_size);
1084 if (bmval[1] & FATTR4_WORD1_MODE)
1085 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086 if (bmval[1] & FATTR4_WORD1_OWNER)
1087 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1091 if (iap->ia_valid & ATTR_ATIME_SET) {
1092 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1093 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1094 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1095 } else
1096 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1097 }
1098 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1099 if (iap->ia_valid & ATTR_MTIME_SET) {
1100 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1101 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1102 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1103 } else
1104 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1105 }
1106 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107 *p++ = cpu_to_be32(label->lfs);
1108 *p++ = cpu_to_be32(label->pi);
1109 *p++ = cpu_to_be32(label->len);
1110 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111 }
1112
1113 /* out: */
1114 }
1115
1116 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1117 {
1118 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1119 encode_uint32(xdr, access);
1120 }
1121
1122 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1123 {
1124 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125 encode_nfs4_seqid(xdr, arg->seqid);
1126 encode_nfs4_stateid(xdr, arg->stateid);
1127 }
1128
1129 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1130 {
1131 __be32 *p;
1132
1133 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1134 p = reserve_space(xdr, 12);
1135 p = xdr_encode_hyper(p, args->offset);
1136 *p = cpu_to_be32(args->count);
1137 }
1138
1139 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1140 {
1141 __be32 *p;
1142
1143 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1144 encode_uint32(xdr, create->ftype);
1145
1146 switch (create->ftype) {
1147 case NF4LNK:
1148 p = reserve_space(xdr, 4);
1149 *p = cpu_to_be32(create->u.symlink.len);
1150 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1151 break;
1152
1153 case NF4BLK: case NF4CHR:
1154 p = reserve_space(xdr, 8);
1155 *p++ = cpu_to_be32(create->u.device.specdata1);
1156 *p = cpu_to_be32(create->u.device.specdata2);
1157 break;
1158
1159 default:
1160 break;
1161 }
1162
1163 encode_string(xdr, create->name->len, create->name->name);
1164 encode_attrs(xdr, create->attrs, create->label, create->server);
1165 }
1166
1167 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1168 {
1169 __be32 *p;
1170
1171 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1172 p = reserve_space(xdr, 8);
1173 *p++ = cpu_to_be32(1);
1174 *p = cpu_to_be32(bitmap);
1175 }
1176
1177 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1178 {
1179 __be32 *p;
1180
1181 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1182 p = reserve_space(xdr, 12);
1183 *p++ = cpu_to_be32(2);
1184 *p++ = cpu_to_be32(bm0);
1185 *p = cpu_to_be32(bm1);
1186 }
1187
1188 static void
1189 encode_getattr_three(struct xdr_stream *xdr,
1190 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1191 struct compound_hdr *hdr)
1192 {
1193 __be32 *p;
1194
1195 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196 if (bm2) {
1197 p = reserve_space(xdr, 16);
1198 *p++ = cpu_to_be32(3);
1199 *p++ = cpu_to_be32(bm0);
1200 *p++ = cpu_to_be32(bm1);
1201 *p = cpu_to_be32(bm2);
1202 } else if (bm1) {
1203 p = reserve_space(xdr, 12);
1204 *p++ = cpu_to_be32(2);
1205 *p++ = cpu_to_be32(bm0);
1206 *p = cpu_to_be32(bm1);
1207 } else {
1208 p = reserve_space(xdr, 8);
1209 *p++ = cpu_to_be32(1);
1210 *p = cpu_to_be32(bm0);
1211 }
1212 }
1213
1214 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215 {
1216 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1217 bitmask[1] & nfs4_fattr_bitmap[1],
1218 bitmask[2] & nfs4_fattr_bitmap[2],
1219 hdr);
1220 }
1221
1222 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223 const u32 *open_bitmap,
1224 struct compound_hdr *hdr)
1225 {
1226 encode_getattr_three(xdr,
1227 bitmask[0] & open_bitmap[0],
1228 bitmask[1] & open_bitmap[1],
1229 bitmask[2] & open_bitmap[2],
1230 hdr);
1231 }
1232
1233 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1234 {
1235 encode_getattr_three(xdr,
1236 bitmask[0] & nfs4_fsinfo_bitmap[0],
1237 bitmask[1] & nfs4_fsinfo_bitmap[1],
1238 bitmask[2] & nfs4_fsinfo_bitmap[2],
1239 hdr);
1240 }
1241
1242 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243 {
1244 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1245 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246 }
1247
1248 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1249 {
1250 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1251 }
1252
1253 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1254 {
1255 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256 encode_string(xdr, name->len, name->name);
1257 }
1258
1259 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1260 {
1261 if (fl->fl_type == F_RDLCK)
1262 return block ? NFS4_READW_LT : NFS4_READ_LT;
1263 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1264 }
1265
1266 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1267 {
1268 if (fl->fl_end == OFFSET_MAX)
1269 return ~(uint64_t)0;
1270 return fl->fl_end - fl->fl_start + 1;
1271 }
1272
1273 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1274 {
1275 __be32 *p;
1276
1277 p = reserve_space(xdr, 32);
1278 p = xdr_encode_hyper(p, lowner->clientid);
1279 *p++ = cpu_to_be32(20);
1280 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281 *p++ = cpu_to_be32(lowner->s_dev);
1282 xdr_encode_hyper(p, lowner->id);
1283 }
1284
1285 /*
1286 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1287 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1288 */
1289 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1290 {
1291 __be32 *p;
1292
1293 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1294 p = reserve_space(xdr, 28);
1295 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1296 *p++ = cpu_to_be32(args->reclaim);
1297 p = xdr_encode_hyper(p, args->fl->fl_start);
1298 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 *p = cpu_to_be32(args->new_lock_owner);
1300 if (args->new_lock_owner){
1301 encode_nfs4_seqid(xdr, args->open_seqid);
1302 encode_nfs4_stateid(xdr, args->open_stateid);
1303 encode_nfs4_seqid(xdr, args->lock_seqid);
1304 encode_lockowner(xdr, &args->lock_owner);
1305 }
1306 else {
1307 encode_nfs4_stateid(xdr, args->lock_stateid);
1308 encode_nfs4_seqid(xdr, args->lock_seqid);
1309 }
1310 }
1311
1312 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1313 {
1314 __be32 *p;
1315
1316 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1317 p = reserve_space(xdr, 20);
1318 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1319 p = xdr_encode_hyper(p, args->fl->fl_start);
1320 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321 encode_lockowner(xdr, &args->lock_owner);
1322 }
1323
1324 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1329 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330 encode_nfs4_seqid(xdr, args->seqid);
1331 encode_nfs4_stateid(xdr, args->stateid);
1332 p = reserve_space(xdr, 16);
1333 p = xdr_encode_hyper(p, args->fl->fl_start);
1334 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 }
1336
1337 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1338 {
1339 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340 encode_lockowner(xdr, lowner);
1341 }
1342
1343 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1344 {
1345 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346 encode_string(xdr, name->len, name->name);
1347 }
1348
1349 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1350 {
1351 __be32 *p;
1352
1353 p = reserve_space(xdr, 8);
1354 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1355 case FMODE_READ:
1356 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1357 break;
1358 case FMODE_WRITE:
1359 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1360 break;
1361 case FMODE_READ|FMODE_WRITE:
1362 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1363 break;
1364 default:
1365 *p++ = cpu_to_be32(0);
1366 }
1367 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1368 }
1369
1370 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1371 {
1372 __be32 *p;
1373 /*
1374 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1375 * owner 4 = 32
1376 */
1377 encode_nfs4_seqid(xdr, arg->seqid);
1378 encode_share_access(xdr, arg->fmode);
1379 p = reserve_space(xdr, 36);
1380 p = xdr_encode_hyper(p, arg->clientid);
1381 *p++ = cpu_to_be32(24);
1382 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383 *p++ = cpu_to_be32(arg->server->s_dev);
1384 *p++ = cpu_to_be32(arg->id.uniquifier);
1385 xdr_encode_hyper(p, arg->id.create_time);
1386 }
1387
1388 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390 struct iattr dummy;
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 4);
1394 switch(arg->createmode) {
1395 case NFS4_CREATE_UNCHECKED:
1396 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1398 break;
1399 case NFS4_CREATE_GUARDED:
1400 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402 break;
1403 case NFS4_CREATE_EXCLUSIVE:
1404 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1405 encode_nfs4_verifier(xdr, &arg->u.verifier);
1406 break;
1407 case NFS4_CREATE_EXCLUSIVE4_1:
1408 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1409 encode_nfs4_verifier(xdr, &arg->u.verifier);
1410 dummy.ia_valid = 0;
1411 encode_attrs(xdr, &dummy, arg->label, arg->server);
1412 }
1413 }
1414
1415 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1416 {
1417 __be32 *p;
1418
1419 p = reserve_space(xdr, 4);
1420 switch (arg->open_flags & O_CREAT) {
1421 case 0:
1422 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1423 break;
1424 default:
1425 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1426 encode_createmode(xdr, arg);
1427 }
1428 }
1429
1430 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1431 {
1432 __be32 *p;
1433
1434 p = reserve_space(xdr, 4);
1435 switch (delegation_type) {
1436 case 0:
1437 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1438 break;
1439 case FMODE_READ:
1440 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1441 break;
1442 case FMODE_WRITE|FMODE_READ:
1443 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1444 break;
1445 default:
1446 BUG();
1447 }
1448 }
1449
1450 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1451 {
1452 __be32 *p;
1453
1454 p = reserve_space(xdr, 4);
1455 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1456 encode_string(xdr, name->len, name->name);
1457 }
1458
1459 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1460 {
1461 __be32 *p;
1462
1463 p = reserve_space(xdr, 4);
1464 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1465 encode_delegation_type(xdr, type);
1466 }
1467
1468 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1469 {
1470 __be32 *p;
1471
1472 p = reserve_space(xdr, 4);
1473 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1474 encode_nfs4_stateid(xdr, stateid);
1475 encode_string(xdr, name->len, name->name);
1476 }
1477
1478 static inline void encode_claim_fh(struct xdr_stream *xdr)
1479 {
1480 __be32 *p;
1481
1482 p = reserve_space(xdr, 4);
1483 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1484 }
1485
1486 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1492 encode_nfs4_stateid(xdr, stateid);
1493 }
1494
1495 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1496 {
1497 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1498 encode_openhdr(xdr, arg);
1499 encode_opentype(xdr, arg);
1500 switch (arg->claim) {
1501 case NFS4_OPEN_CLAIM_NULL:
1502 encode_claim_null(xdr, arg->name);
1503 break;
1504 case NFS4_OPEN_CLAIM_PREVIOUS:
1505 encode_claim_previous(xdr, arg->u.delegation_type);
1506 break;
1507 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1508 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1509 break;
1510 case NFS4_OPEN_CLAIM_FH:
1511 encode_claim_fh(xdr);
1512 break;
1513 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1514 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1515 break;
1516 default:
1517 BUG();
1518 }
1519 }
1520
1521 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1522 {
1523 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524 encode_nfs4_stateid(xdr, arg->stateid);
1525 encode_nfs4_seqid(xdr, arg->seqid);
1526 }
1527
1528 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1529 {
1530 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531 encode_nfs4_stateid(xdr, arg->stateid);
1532 encode_nfs4_seqid(xdr, arg->seqid);
1533 encode_share_access(xdr, arg->fmode);
1534 }
1535
1536 static void
1537 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1538 {
1539 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540 encode_string(xdr, fh->size, fh->data);
1541 }
1542
1543 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1544 {
1545 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1546 }
1547
1548 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1549 {
1550 __be32 *p;
1551
1552 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1553 encode_nfs4_stateid(xdr, &args->stateid);
1554
1555 p = reserve_space(xdr, 12);
1556 p = xdr_encode_hyper(p, args->offset);
1557 *p = cpu_to_be32(args->count);
1558 }
1559
1560 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1561 {
1562 uint32_t attrs[3] = {
1563 FATTR4_WORD0_RDATTR_ERROR,
1564 FATTR4_WORD1_MOUNTED_ON_FILEID,
1565 };
1566 uint32_t dircount = readdir->count >> 1;
1567 __be32 *p, verf[2];
1568
1569 if (readdir->plus) {
1570 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1571 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1572 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1573 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1574 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1575 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1576 dircount >>= 1;
1577 }
1578 /* Use mounted_on_fileid only if the server supports it */
1579 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1580 attrs[0] |= FATTR4_WORD0_FILEID;
1581
1582 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1583 encode_uint64(xdr, readdir->cookie);
1584 encode_nfs4_verifier(xdr, &readdir->verifier);
1585 p = reserve_space(xdr, encode_readdir_space);
1586 *p++ = cpu_to_be32(dircount);
1587 *p++ = cpu_to_be32(readdir->count);
1588 *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1589 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1590 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1591 if (encode_readdir_bitmask_sz > 2) {
1592 if (hdr->minorversion > 1)
1593 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594 p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1595 }
1596 memcpy(verf, readdir->verifier.data, sizeof(verf));
1597
1598 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1599 __func__,
1600 (unsigned long long)readdir->cookie,
1601 verf[0], verf[1],
1602 attrs[0] & readdir->bitmask[0],
1603 attrs[1] & readdir->bitmask[1],
1604 attrs[2] & readdir->bitmask[2]);
1605 }
1606
1607 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1608 {
1609 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1610 }
1611
1612 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1613 {
1614 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1615 encode_string(xdr, name->len, name->name);
1616 }
1617
1618 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1619 {
1620 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1621 encode_string(xdr, oldname->len, oldname->name);
1622 encode_string(xdr, newname->len, newname->name);
1623 }
1624
1625 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1626 struct compound_hdr *hdr)
1627 {
1628 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1629 encode_uint64(xdr, clid);
1630 }
1631
1632 static void
1633 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1634 {
1635 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1636 }
1637
1638 static void
1639 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1640 {
1641 __be32 *p;
1642
1643 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1644 encode_nfs4_stateid(xdr, &zero_stateid);
1645 p = reserve_space(xdr, 2*4);
1646 *p++ = cpu_to_be32(1);
1647 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1648 p = reserve_space(xdr, 4);
1649 *p = cpu_to_be32(arg->acl_len);
1650 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1651 }
1652
1653 static void
1654 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1655 {
1656 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1657 }
1658
1659 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1660 {
1661 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1662 encode_nfs4_stateid(xdr, &arg->stateid);
1663 encode_attrs(xdr, arg->iap, arg->label, server);
1664 }
1665
1666 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1667 {
1668 __be32 *p;
1669
1670 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1671 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1672
1673 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1674 p = reserve_space(xdr, 4);
1675 *p = cpu_to_be32(setclientid->sc_prog);
1676 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1677 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1678 p = reserve_space(xdr, 4);
1679 *p = cpu_to_be32(setclientid->sc_cb_ident);
1680 }
1681
1682 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1683 {
1684 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1685 decode_setclientid_confirm_maxsz, hdr);
1686 encode_uint64(xdr, arg->clientid);
1687 encode_nfs4_verifier(xdr, &arg->confirm);
1688 }
1689
1690 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1691 {
1692 __be32 *p;
1693
1694 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1695 encode_nfs4_stateid(xdr, &args->stateid);
1696
1697 p = reserve_space(xdr, 16);
1698 p = xdr_encode_hyper(p, args->offset);
1699 *p++ = cpu_to_be32(args->stable);
1700 *p = cpu_to_be32(args->count);
1701
1702 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1703 }
1704
1705 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1706 {
1707 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1708 encode_nfs4_stateid(xdr, stateid);
1709 }
1710
1711 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1712 {
1713 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1714 encode_string(xdr, name->len, name->name);
1715 }
1716
1717 #if defined(CONFIG_NFS_V4_1)
1718 /* NFSv4.1 operations */
1719 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1720 struct nfs4_session *session,
1721 struct compound_hdr *hdr)
1722 {
1723 __be32 *p;
1724
1725 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1726 decode_bind_conn_to_session_maxsz, hdr);
1727 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1728 p = xdr_reserve_space(xdr, 8);
1729 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1730 *p = 0; /* use_conn_in_rdma_mode = False */
1731 }
1732
1733 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1734 {
1735 unsigned int i;
1736 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1737 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1738 encode_uint32(xdr, op_map->u.words[i]);
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 encode_uint32(xdr, args->flags);
1755 encode_uint32(xdr, args->state_protect.how);
1756
1757 switch (args->state_protect.how) {
1758 case SP4_NONE:
1759 break;
1760 case SP4_MACH_CRED:
1761 encode_op_map(xdr, &args->state_protect.enforce);
1762 encode_op_map(xdr, &args->state_protect.allow);
1763 break;
1764 default:
1765 WARN_ON_ONCE(1);
1766 break;
1767 }
1768
1769 if (send_implementation_id &&
1770 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1771 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1772 <= sizeof(impl_name) + 1)
1773 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1774 utsname()->sysname, utsname()->release,
1775 utsname()->version, utsname()->machine);
1776
1777 if (len > 0) {
1778 encode_uint32(xdr, 1); /* implementation id array length=1 */
1779
1780 encode_string(xdr,
1781 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1782 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1783 encode_string(xdr, len, impl_name);
1784 /* just send zeros for nii_date - the date is in nii_name */
1785 p = reserve_space(xdr, 12);
1786 p = xdr_encode_hyper(p, 0);
1787 *p = cpu_to_be32(0);
1788 } else
1789 encode_uint32(xdr, 0); /* implementation id array length=0 */
1790 }
1791
1792 static void encode_create_session(struct xdr_stream *xdr,
1793 struct nfs41_create_session_args *args,
1794 struct compound_hdr *hdr)
1795 {
1796 __be32 *p;
1797 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1798 uint32_t len;
1799 struct nfs_client *clp = args->client;
1800 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1801 u32 max_resp_sz_cached;
1802
1803 /*
1804 * Assumes OPEN is the biggest non-idempotent compound.
1805 * 2 is the verifier.
1806 */
1807 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1808 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1809
1810 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1811 clp->cl_ipaddr);
1812
1813 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1814 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1815 p = xdr_encode_hyper(p, clp->cl_clientid);
1816 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1817 *p++ = cpu_to_be32(args->flags); /*flags */
1818
1819 /* Fore Channel */
1820 *p++ = cpu_to_be32(0); /* header padding size */
1821 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1822 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1823 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1824 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1825 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1826 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1827
1828 /* Back Channel */
1829 *p++ = cpu_to_be32(0); /* header padding size */
1830 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1831 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1832 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1833 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1834 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1835 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1836
1837 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1838 *p++ = cpu_to_be32(1);
1839 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1840
1841 /* authsys_parms rfc1831 */
1842 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1843 p = xdr_encode_opaque(p, machine_name, len);
1844 *p++ = cpu_to_be32(0); /* UID */
1845 *p++ = cpu_to_be32(0); /* GID */
1846 *p = cpu_to_be32(0); /* No more gids */
1847 }
1848
1849 static void encode_destroy_session(struct xdr_stream *xdr,
1850 struct nfs4_session *session,
1851 struct compound_hdr *hdr)
1852 {
1853 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1854 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1855 }
1856
1857 static void encode_destroy_clientid(struct xdr_stream *xdr,
1858 uint64_t clientid,
1859 struct compound_hdr *hdr)
1860 {
1861 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1862 encode_uint64(xdr, clientid);
1863 }
1864
1865 static void encode_reclaim_complete(struct xdr_stream *xdr,
1866 struct nfs41_reclaim_complete_args *args,
1867 struct compound_hdr *hdr)
1868 {
1869 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1870 encode_uint32(xdr, args->one_fs);
1871 }
1872 #endif /* CONFIG_NFS_V4_1 */
1873
1874 static void encode_sequence(struct xdr_stream *xdr,
1875 const struct nfs4_sequence_args *args,
1876 struct compound_hdr *hdr)
1877 {
1878 #if defined(CONFIG_NFS_V4_1)
1879 struct nfs4_session *session;
1880 struct nfs4_slot_table *tp;
1881 struct nfs4_slot *slot = args->sa_slot;
1882 __be32 *p;
1883
1884 tp = slot->table;
1885 session = tp->session;
1886 if (!session)
1887 return;
1888
1889 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1890
1891 /*
1892 * Sessionid + seqid + slotid + max slotid + cache_this
1893 */
1894 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1895 "max_slotid=%d cache_this=%d\n",
1896 __func__,
1897 ((u32 *)session->sess_id.data)[0],
1898 ((u32 *)session->sess_id.data)[1],
1899 ((u32 *)session->sess_id.data)[2],
1900 ((u32 *)session->sess_id.data)[3],
1901 slot->seq_nr, slot->slot_nr,
1902 tp->highest_used_slotid, args->sa_cache_this);
1903 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1904 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1905 *p++ = cpu_to_be32(slot->seq_nr);
1906 *p++ = cpu_to_be32(slot->slot_nr);
1907 *p++ = cpu_to_be32(tp->highest_used_slotid);
1908 *p = cpu_to_be32(args->sa_cache_this);
1909 #endif /* CONFIG_NFS_V4_1 */
1910 }
1911
1912 #ifdef CONFIG_NFS_V4_1
1913 static void
1914 encode_getdevicelist(struct xdr_stream *xdr,
1915 const struct nfs4_getdevicelist_args *args,
1916 struct compound_hdr *hdr)
1917 {
1918 __be32 *p;
1919 nfs4_verifier dummy = {
1920 .data = "dummmmmy",
1921 };
1922
1923 encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1924 p = reserve_space(xdr, 16);
1925 *p++ = cpu_to_be32(args->layoutclass);
1926 *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1927 xdr_encode_hyper(p, 0ULL); /* cookie */
1928 encode_nfs4_verifier(xdr, &dummy);
1929 }
1930
1931 static void
1932 encode_getdeviceinfo(struct xdr_stream *xdr,
1933 const struct nfs4_getdeviceinfo_args *args,
1934 struct compound_hdr *hdr)
1935 {
1936 __be32 *p;
1937
1938 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1939 p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1940 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1941 NFS4_DEVICEID4_SIZE);
1942 *p++ = cpu_to_be32(args->pdev->layout_type);
1943 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1944 *p++ = cpu_to_be32(0); /* bitmap length 0 */
1945 }
1946
1947 static void
1948 encode_layoutget(struct xdr_stream *xdr,
1949 const struct nfs4_layoutget_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1955 p = reserve_space(xdr, 36);
1956 *p++ = cpu_to_be32(0); /* Signal layout available */
1957 *p++ = cpu_to_be32(args->type);
1958 *p++ = cpu_to_be32(args->range.iomode);
1959 p = xdr_encode_hyper(p, args->range.offset);
1960 p = xdr_encode_hyper(p, args->range.length);
1961 p = xdr_encode_hyper(p, args->minlength);
1962 encode_nfs4_stateid(xdr, &args->stateid);
1963 encode_uint32(xdr, args->maxcount);
1964
1965 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1966 __func__,
1967 args->type,
1968 args->range.iomode,
1969 (unsigned long)args->range.offset,
1970 (unsigned long)args->range.length,
1971 args->maxcount);
1972 }
1973
1974 static int
1975 encode_layoutcommit(struct xdr_stream *xdr,
1976 struct inode *inode,
1977 const struct nfs4_layoutcommit_args *args,
1978 struct compound_hdr *hdr)
1979 {
1980 __be32 *p;
1981
1982 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1983 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1984
1985 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1986 p = reserve_space(xdr, 20);
1987 /* Only whole file layouts */
1988 p = xdr_encode_hyper(p, 0); /* offset */
1989 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1990 *p = cpu_to_be32(0); /* reclaim */
1991 encode_nfs4_stateid(xdr, &args->stateid);
1992 p = reserve_space(xdr, 20);
1993 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1994 p = xdr_encode_hyper(p, args->lastbytewritten);
1995 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1996 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1997
1998 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1999 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2000 NFS_I(inode)->layout, xdr, args);
2001 else
2002 encode_uint32(xdr, 0); /* no layout-type payload */
2003
2004 return 0;
2005 }
2006
2007 static void
2008 encode_layoutreturn(struct xdr_stream *xdr,
2009 const struct nfs4_layoutreturn_args *args,
2010 struct compound_hdr *hdr)
2011 {
2012 __be32 *p;
2013
2014 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2015 p = reserve_space(xdr, 16);
2016 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2017 *p++ = cpu_to_be32(args->layout_type);
2018 *p++ = cpu_to_be32(IOMODE_ANY);
2019 *p = cpu_to_be32(RETURN_FILE);
2020 p = reserve_space(xdr, 16);
2021 p = xdr_encode_hyper(p, 0);
2022 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2023 spin_lock(&args->inode->i_lock);
2024 encode_nfs4_stateid(xdr, &args->stateid);
2025 spin_unlock(&args->inode->i_lock);
2026 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2027 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2028 NFS_I(args->inode)->layout, xdr, args);
2029 } else
2030 encode_uint32(xdr, 0);
2031 }
2032
2033 static int
2034 encode_secinfo_no_name(struct xdr_stream *xdr,
2035 const struct nfs41_secinfo_no_name_args *args,
2036 struct compound_hdr *hdr)
2037 {
2038 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2039 encode_uint32(xdr, args->style);
2040 return 0;
2041 }
2042
2043 static void encode_test_stateid(struct xdr_stream *xdr,
2044 struct nfs41_test_stateid_args *args,
2045 struct compound_hdr *hdr)
2046 {
2047 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2048 encode_uint32(xdr, 1);
2049 encode_nfs4_stateid(xdr, args->stateid);
2050 }
2051
2052 static void encode_free_stateid(struct xdr_stream *xdr,
2053 struct nfs41_free_stateid_args *args,
2054 struct compound_hdr *hdr)
2055 {
2056 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057 encode_nfs4_stateid(xdr, &args->stateid);
2058 }
2059 #endif /* CONFIG_NFS_V4_1 */
2060
2061 /*
2062 * END OF "GENERIC" ENCODE ROUTINES.
2063 */
2064
2065 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2066 {
2067 #if defined(CONFIG_NFS_V4_1)
2068 struct nfs4_session *session = args->sa_slot->table->session;
2069 if (session)
2070 return session->clp->cl_mvops->minor_version;
2071 #endif /* CONFIG_NFS_V4_1 */
2072 return 0;
2073 }
2074
2075 /*
2076 * Encode an ACCESS request
2077 */
2078 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2079 const struct nfs4_accessargs *args)
2080 {
2081 struct compound_hdr hdr = {
2082 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083 };
2084
2085 encode_compound_hdr(xdr, req, &hdr);
2086 encode_sequence(xdr, &args->seq_args, &hdr);
2087 encode_putfh(xdr, args->fh, &hdr);
2088 encode_access(xdr, args->access, &hdr);
2089 encode_getfattr(xdr, args->bitmask, &hdr);
2090 encode_nops(&hdr);
2091 }
2092
2093 /*
2094 * Encode LOOKUP request
2095 */
2096 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2097 const struct nfs4_lookup_arg *args)
2098 {
2099 struct compound_hdr hdr = {
2100 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101 };
2102
2103 encode_compound_hdr(xdr, req, &hdr);
2104 encode_sequence(xdr, &args->seq_args, &hdr);
2105 encode_putfh(xdr, args->dir_fh, &hdr);
2106 encode_lookup(xdr, args->name, &hdr);
2107 encode_getfh(xdr, &hdr);
2108 encode_getfattr(xdr, args->bitmask, &hdr);
2109 encode_nops(&hdr);
2110 }
2111
2112 /*
2113 * Encode LOOKUP_ROOT request
2114 */
2115 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2116 struct xdr_stream *xdr,
2117 const struct nfs4_lookup_root_arg *args)
2118 {
2119 struct compound_hdr hdr = {
2120 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121 };
2122
2123 encode_compound_hdr(xdr, req, &hdr);
2124 encode_sequence(xdr, &args->seq_args, &hdr);
2125 encode_putrootfh(xdr, &hdr);
2126 encode_getfh(xdr, &hdr);
2127 encode_getfattr(xdr, args->bitmask, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode REMOVE request
2133 */
2134 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2135 const struct nfs_removeargs *args)
2136 {
2137 struct compound_hdr hdr = {
2138 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139 };
2140
2141 encode_compound_hdr(xdr, req, &hdr);
2142 encode_sequence(xdr, &args->seq_args, &hdr);
2143 encode_putfh(xdr, args->fh, &hdr);
2144 encode_remove(xdr, &args->name, &hdr);
2145 encode_nops(&hdr);
2146 }
2147
2148 /*
2149 * Encode RENAME request
2150 */
2151 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2152 const struct nfs_renameargs *args)
2153 {
2154 struct compound_hdr hdr = {
2155 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156 };
2157
2158 encode_compound_hdr(xdr, req, &hdr);
2159 encode_sequence(xdr, &args->seq_args, &hdr);
2160 encode_putfh(xdr, args->old_dir, &hdr);
2161 encode_savefh(xdr, &hdr);
2162 encode_putfh(xdr, args->new_dir, &hdr);
2163 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164 encode_nops(&hdr);
2165 }
2166
2167 /*
2168 * Encode LINK request
2169 */
2170 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2171 const struct nfs4_link_arg *args)
2172 {
2173 struct compound_hdr hdr = {
2174 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175 };
2176
2177 encode_compound_hdr(xdr, req, &hdr);
2178 encode_sequence(xdr, &args->seq_args, &hdr);
2179 encode_putfh(xdr, args->fh, &hdr);
2180 encode_savefh(xdr, &hdr);
2181 encode_putfh(xdr, args->dir_fh, &hdr);
2182 encode_link(xdr, args->name, &hdr);
2183 encode_restorefh(xdr, &hdr);
2184 encode_getfattr(xdr, args->bitmask, &hdr);
2185 encode_nops(&hdr);
2186 }
2187
2188 /*
2189 * Encode CREATE request
2190 */
2191 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2192 const struct nfs4_create_arg *args)
2193 {
2194 struct compound_hdr hdr = {
2195 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196 };
2197
2198 encode_compound_hdr(xdr, req, &hdr);
2199 encode_sequence(xdr, &args->seq_args, &hdr);
2200 encode_putfh(xdr, args->dir_fh, &hdr);
2201 encode_create(xdr, args, &hdr);
2202 encode_getfh(xdr, &hdr);
2203 encode_getfattr(xdr, args->bitmask, &hdr);
2204 encode_nops(&hdr);
2205 }
2206
2207 /*
2208 * Encode SYMLINK request
2209 */
2210 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2211 const struct nfs4_create_arg *args)
2212 {
2213 nfs4_xdr_enc_create(req, xdr, args);
2214 }
2215
2216 /*
2217 * Encode GETATTR request
2218 */
2219 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2220 const struct nfs4_getattr_arg *args)
2221 {
2222 struct compound_hdr hdr = {
2223 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224 };
2225
2226 encode_compound_hdr(xdr, req, &hdr);
2227 encode_sequence(xdr, &args->seq_args, &hdr);
2228 encode_putfh(xdr, args->fh, &hdr);
2229 encode_getfattr(xdr, args->bitmask, &hdr);
2230 encode_nops(&hdr);
2231 }
2232
2233 /*
2234 * Encode a CLOSE request
2235 */
2236 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2237 struct nfs_closeargs *args)
2238 {
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 encode_compound_hdr(xdr, req, &hdr);
2244 encode_sequence(xdr, &args->seq_args, &hdr);
2245 encode_putfh(xdr, args->fh, &hdr);
2246 encode_close(xdr, args, &hdr);
2247 encode_getfattr(xdr, args->bitmask, &hdr);
2248 encode_nops(&hdr);
2249 }
2250
2251 /*
2252 * Encode an OPEN request
2253 */
2254 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2255 struct nfs_openargs *args)
2256 {
2257 struct compound_hdr hdr = {
2258 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259 };
2260
2261 encode_compound_hdr(xdr, req, &hdr);
2262 encode_sequence(xdr, &args->seq_args, &hdr);
2263 encode_putfh(xdr, args->fh, &hdr);
2264 encode_open(xdr, args, &hdr);
2265 encode_getfh(xdr, &hdr);
2266 if (args->access)
2267 encode_access(xdr, args->access, &hdr);
2268 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269 encode_nops(&hdr);
2270 }
2271
2272 /*
2273 * Encode an OPEN_CONFIRM request
2274 */
2275 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2276 struct xdr_stream *xdr,
2277 struct nfs_open_confirmargs *args)
2278 {
2279 struct compound_hdr hdr = {
2280 .nops = 0,
2281 };
2282
2283 encode_compound_hdr(xdr, req, &hdr);
2284 encode_putfh(xdr, args->fh, &hdr);
2285 encode_open_confirm(xdr, args, &hdr);
2286 encode_nops(&hdr);
2287 }
2288
2289 /*
2290 * Encode an OPEN request with no attributes.
2291 */
2292 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2293 struct xdr_stream *xdr,
2294 struct nfs_openargs *args)
2295 {
2296 struct compound_hdr hdr = {
2297 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298 };
2299
2300 encode_compound_hdr(xdr, req, &hdr);
2301 encode_sequence(xdr, &args->seq_args, &hdr);
2302 encode_putfh(xdr, args->fh, &hdr);
2303 encode_open(xdr, args, &hdr);
2304 if (args->access)
2305 encode_access(xdr, args->access, &hdr);
2306 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307 encode_nops(&hdr);
2308 }
2309
2310 /*
2311 * Encode an OPEN_DOWNGRADE request
2312 */
2313 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2314 struct xdr_stream *xdr,
2315 struct nfs_closeargs *args)
2316 {
2317 struct compound_hdr hdr = {
2318 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319 };
2320
2321 encode_compound_hdr(xdr, req, &hdr);
2322 encode_sequence(xdr, &args->seq_args, &hdr);
2323 encode_putfh(xdr, args->fh, &hdr);
2324 encode_open_downgrade(xdr, args, &hdr);
2325 encode_getfattr(xdr, args->bitmask, &hdr);
2326 encode_nops(&hdr);
2327 }
2328
2329 /*
2330 * Encode a LOCK request
2331 */
2332 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2333 struct nfs_lock_args *args)
2334 {
2335 struct compound_hdr hdr = {
2336 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337 };
2338
2339 encode_compound_hdr(xdr, req, &hdr);
2340 encode_sequence(xdr, &args->seq_args, &hdr);
2341 encode_putfh(xdr, args->fh, &hdr);
2342 encode_lock(xdr, args, &hdr);
2343 encode_nops(&hdr);
2344 }
2345
2346 /*
2347 * Encode a LOCKT request
2348 */
2349 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2350 struct nfs_lockt_args *args)
2351 {
2352 struct compound_hdr hdr = {
2353 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354 };
2355
2356 encode_compound_hdr(xdr, req, &hdr);
2357 encode_sequence(xdr, &args->seq_args, &hdr);
2358 encode_putfh(xdr, args->fh, &hdr);
2359 encode_lockt(xdr, args, &hdr);
2360 encode_nops(&hdr);
2361 }
2362
2363 /*
2364 * Encode a LOCKU request
2365 */
2366 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2367 struct nfs_locku_args *args)
2368 {
2369 struct compound_hdr hdr = {
2370 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371 };
2372
2373 encode_compound_hdr(xdr, req, &hdr);
2374 encode_sequence(xdr, &args->seq_args, &hdr);
2375 encode_putfh(xdr, args->fh, &hdr);
2376 encode_locku(xdr, args, &hdr);
2377 encode_nops(&hdr);
2378 }
2379
2380 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2381 struct xdr_stream *xdr,
2382 struct nfs_release_lockowner_args *args)
2383 {
2384 struct compound_hdr hdr = {
2385 .minorversion = 0,
2386 };
2387
2388 encode_compound_hdr(xdr, req, &hdr);
2389 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390 encode_nops(&hdr);
2391 }
2392
2393 /*
2394 * Encode a READLINK request
2395 */
2396 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2397 const struct nfs4_readlink *args)
2398 {
2399 struct compound_hdr hdr = {
2400 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_sequence(xdr, &args->seq_args, &hdr);
2405 encode_putfh(xdr, args->fh, &hdr);
2406 encode_readlink(xdr, args, req, &hdr);
2407
2408 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409 args->pgbase, args->pglen);
2410 encode_nops(&hdr);
2411 }
2412
2413 /*
2414 * Encode a READDIR request
2415 */
2416 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2417 const struct nfs4_readdir_arg *args)
2418 {
2419 struct compound_hdr hdr = {
2420 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2421 };
2422
2423 encode_compound_hdr(xdr, req, &hdr);
2424 encode_sequence(xdr, &args->seq_args, &hdr);
2425 encode_putfh(xdr, args->fh, &hdr);
2426 encode_readdir(xdr, args, req, &hdr);
2427
2428 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429 args->pgbase, args->count);
2430 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431 __func__, hdr.replen << 2, args->pages,
2432 args->pgbase, args->count);
2433 encode_nops(&hdr);
2434 }
2435
2436 /*
2437 * Encode a READ request
2438 */
2439 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2440 struct nfs_readargs *args)
2441 {
2442 struct compound_hdr hdr = {
2443 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_sequence(xdr, &args->seq_args, &hdr);
2448 encode_putfh(xdr, args->fh, &hdr);
2449 encode_read(xdr, args, &hdr);
2450
2451 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2452 args->pages, args->pgbase, args->count);
2453 req->rq_rcv_buf.flags |= XDRBUF_READ;
2454 encode_nops(&hdr);
2455 }
2456
2457 /*
2458 * Encode an SETATTR request
2459 */
2460 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2461 struct nfs_setattrargs *args)
2462 {
2463 struct compound_hdr hdr = {
2464 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465 };
2466
2467 encode_compound_hdr(xdr, req, &hdr);
2468 encode_sequence(xdr, &args->seq_args, &hdr);
2469 encode_putfh(xdr, args->fh, &hdr);
2470 encode_setattr(xdr, args, args->server, &hdr);
2471 encode_getfattr(xdr, args->bitmask, &hdr);
2472 encode_nops(&hdr);
2473 }
2474
2475 /*
2476 * Encode a GETACL request
2477 */
2478 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2479 struct nfs_getaclargs *args)
2480 {
2481 struct compound_hdr hdr = {
2482 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483 };
2484 uint32_t replen;
2485
2486 encode_compound_hdr(xdr, req, &hdr);
2487 encode_sequence(xdr, &args->seq_args, &hdr);
2488 encode_putfh(xdr, args->fh, &hdr);
2489 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491
2492 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493 args->acl_pages, args->acl_pgbase, args->acl_len);
2494
2495 encode_nops(&hdr);
2496 }
2497
2498 /*
2499 * Encode a WRITE request
2500 */
2501 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2502 struct nfs_writeargs *args)
2503 {
2504 struct compound_hdr hdr = {
2505 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506 };
2507
2508 encode_compound_hdr(xdr, req, &hdr);
2509 encode_sequence(xdr, &args->seq_args, &hdr);
2510 encode_putfh(xdr, args->fh, &hdr);
2511 encode_write(xdr, args, &hdr);
2512 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513 if (args->bitmask)
2514 encode_getfattr(xdr, args->bitmask, &hdr);
2515 encode_nops(&hdr);
2516 }
2517
2518 /*
2519 * a COMMIT request
2520 */
2521 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522 struct nfs_commitargs *args)
2523 {
2524 struct compound_hdr hdr = {
2525 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2526 };
2527
2528 encode_compound_hdr(xdr, req, &hdr);
2529 encode_sequence(xdr, &args->seq_args, &hdr);
2530 encode_putfh(xdr, args->fh, &hdr);
2531 encode_commit(xdr, args, &hdr);
2532 encode_nops(&hdr);
2533 }
2534
2535 /*
2536 * FSINFO request
2537 */
2538 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2539 struct nfs4_fsinfo_arg *args)
2540 {
2541 struct compound_hdr hdr = {
2542 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543 };
2544
2545 encode_compound_hdr(xdr, req, &hdr);
2546 encode_sequence(xdr, &args->seq_args, &hdr);
2547 encode_putfh(xdr, args->fh, &hdr);
2548 encode_fsinfo(xdr, args->bitmask, &hdr);
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * a PATHCONF request
2554 */
2555 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const struct nfs4_pathconf_arg *args)
2557 {
2558 struct compound_hdr hdr = {
2559 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560 };
2561
2562 encode_compound_hdr(xdr, req, &hdr);
2563 encode_sequence(xdr, &args->seq_args, &hdr);
2564 encode_putfh(xdr, args->fh, &hdr);
2565 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566 &hdr);
2567 encode_nops(&hdr);
2568 }
2569
2570 /*
2571 * a STATFS request
2572 */
2573 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2574 const struct nfs4_statfs_arg *args)
2575 {
2576 struct compound_hdr hdr = {
2577 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578 };
2579
2580 encode_compound_hdr(xdr, req, &hdr);
2581 encode_sequence(xdr, &args->seq_args, &hdr);
2582 encode_putfh(xdr, args->fh, &hdr);
2583 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585 encode_nops(&hdr);
2586 }
2587
2588 /*
2589 * GETATTR_BITMAP request
2590 */
2591 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2592 struct xdr_stream *xdr,
2593 struct nfs4_server_caps_arg *args)
2594 {
2595 struct compound_hdr hdr = {
2596 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597 };
2598
2599 encode_compound_hdr(xdr, req, &hdr);
2600 encode_sequence(xdr, &args->seq_args, &hdr);
2601 encode_putfh(xdr, args->fhandle, &hdr);
2602 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603 FATTR4_WORD0_FH_EXPIRE_TYPE|
2604 FATTR4_WORD0_LINK_SUPPORT|
2605 FATTR4_WORD0_SYMLINK_SUPPORT|
2606 FATTR4_WORD0_ACLSUPPORT, &hdr);
2607 encode_nops(&hdr);
2608 }
2609
2610 /*
2611 * a RENEW request
2612 */
2613 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2614 struct nfs_client *clp)
2615 {
2616 struct compound_hdr hdr = {
2617 .nops = 0,
2618 };
2619
2620 encode_compound_hdr(xdr, req, &hdr);
2621 encode_renew(xdr, clp->cl_clientid, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a SETCLIENTID request
2627 */
2628 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2629 struct xdr_stream *xdr,
2630 struct nfs4_setclientid *sc)
2631 {
2632 struct compound_hdr hdr = {
2633 .nops = 0,
2634 };
2635
2636 encode_compound_hdr(xdr, req, &hdr);
2637 encode_setclientid(xdr, sc, &hdr);
2638 encode_nops(&hdr);
2639 }
2640
2641 /*
2642 * a SETCLIENTID_CONFIRM request
2643 */
2644 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2645 struct xdr_stream *xdr,
2646 struct nfs4_setclientid_res *arg)
2647 {
2648 struct compound_hdr hdr = {
2649 .nops = 0,
2650 };
2651
2652 encode_compound_hdr(xdr, req, &hdr);
2653 encode_setclientid_confirm(xdr, arg, &hdr);
2654 encode_nops(&hdr);
2655 }
2656
2657 /*
2658 * DELEGRETURN request
2659 */
2660 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2661 struct xdr_stream *xdr,
2662 const struct nfs4_delegreturnargs *args)
2663 {
2664 struct compound_hdr hdr = {
2665 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666 };
2667
2668 encode_compound_hdr(xdr, req, &hdr);
2669 encode_sequence(xdr, &args->seq_args, &hdr);
2670 encode_putfh(xdr, args->fhandle, &hdr);
2671 encode_getfattr(xdr, args->bitmask, &hdr);
2672 encode_delegreturn(xdr, args->stateid, &hdr);
2673 encode_nops(&hdr);
2674 }
2675
2676 /*
2677 * Encode FS_LOCATIONS request
2678 */
2679 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2680 struct xdr_stream *xdr,
2681 struct nfs4_fs_locations_arg *args)
2682 {
2683 struct compound_hdr hdr = {
2684 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685 };
2686 uint32_t replen;
2687
2688 encode_compound_hdr(xdr, req, &hdr);
2689 encode_sequence(xdr, &args->seq_args, &hdr);
2690 encode_putfh(xdr, args->dir_fh, &hdr);
2691 encode_lookup(xdr, args->name, &hdr);
2692 replen = hdr.replen; /* get the attribute into args->page */
2693 encode_fs_locations(xdr, args->bitmask, &hdr);
2694
2695 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2696 0, PAGE_SIZE);
2697 encode_nops(&hdr);
2698 }
2699
2700 /*
2701 * Encode SECINFO request
2702 */
2703 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2704 struct xdr_stream *xdr,
2705 struct nfs4_secinfo_arg *args)
2706 {
2707 struct compound_hdr hdr = {
2708 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2709 };
2710
2711 encode_compound_hdr(xdr, req, &hdr);
2712 encode_sequence(xdr, &args->seq_args, &hdr);
2713 encode_putfh(xdr, args->dir_fh, &hdr);
2714 encode_secinfo(xdr, args->name, &hdr);
2715 encode_nops(&hdr);
2716 }
2717
2718 #if defined(CONFIG_NFS_V4_1)
2719 /*
2720 * BIND_CONN_TO_SESSION request
2721 */
2722 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2723 struct xdr_stream *xdr,
2724 struct nfs_client *clp)
2725 {
2726 struct compound_hdr hdr = {
2727 .minorversion = clp->cl_mvops->minor_version,
2728 };
2729
2730 encode_compound_hdr(xdr, req, &hdr);
2731 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2732 encode_nops(&hdr);
2733 }
2734
2735 /*
2736 * EXCHANGE_ID request
2737 */
2738 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2739 struct xdr_stream *xdr,
2740 struct nfs41_exchange_id_args *args)
2741 {
2742 struct compound_hdr hdr = {
2743 .minorversion = args->client->cl_mvops->minor_version,
2744 };
2745
2746 encode_compound_hdr(xdr, req, &hdr);
2747 encode_exchange_id(xdr, args, &hdr);
2748 encode_nops(&hdr);
2749 }
2750
2751 /*
2752 * a CREATE_SESSION request
2753 */
2754 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2755 struct xdr_stream *xdr,
2756 struct nfs41_create_session_args *args)
2757 {
2758 struct compound_hdr hdr = {
2759 .minorversion = args->client->cl_mvops->minor_version,
2760 };
2761
2762 encode_compound_hdr(xdr, req, &hdr);
2763 encode_create_session(xdr, args, &hdr);
2764 encode_nops(&hdr);
2765 }
2766
2767 /*
2768 * a DESTROY_SESSION request
2769 */
2770 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2771 struct xdr_stream *xdr,
2772 struct nfs4_session *session)
2773 {
2774 struct compound_hdr hdr = {
2775 .minorversion = session->clp->cl_mvops->minor_version,
2776 };
2777
2778 encode_compound_hdr(xdr, req, &hdr);
2779 encode_destroy_session(xdr, session, &hdr);
2780 encode_nops(&hdr);
2781 }
2782
2783 /*
2784 * a DESTROY_CLIENTID request
2785 */
2786 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2787 struct xdr_stream *xdr,
2788 struct nfs_client *clp)
2789 {
2790 struct compound_hdr hdr = {
2791 .minorversion = clp->cl_mvops->minor_version,
2792 };
2793
2794 encode_compound_hdr(xdr, req, &hdr);
2795 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2796 encode_nops(&hdr);
2797 }
2798
2799 /*
2800 * a SEQUENCE request
2801 */
2802 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2803 struct nfs4_sequence_args *args)
2804 {
2805 struct compound_hdr hdr = {
2806 .minorversion = nfs4_xdr_minorversion(args),
2807 };
2808
2809 encode_compound_hdr(xdr, req, &hdr);
2810 encode_sequence(xdr, args, &hdr);
2811 encode_nops(&hdr);
2812 }
2813
2814 /*
2815 * a GET_LEASE_TIME request
2816 */
2817 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2818 struct xdr_stream *xdr,
2819 struct nfs4_get_lease_time_args *args)
2820 {
2821 struct compound_hdr hdr = {
2822 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2823 };
2824 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2825
2826 encode_compound_hdr(xdr, req, &hdr);
2827 encode_sequence(xdr, &args->la_seq_args, &hdr);
2828 encode_putrootfh(xdr, &hdr);
2829 encode_fsinfo(xdr, lease_bitmap, &hdr);
2830 encode_nops(&hdr);
2831 }
2832
2833 /*
2834 * a RECLAIM_COMPLETE request
2835 */
2836 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2837 struct xdr_stream *xdr,
2838 struct nfs41_reclaim_complete_args *args)
2839 {
2840 struct compound_hdr hdr = {
2841 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2842 };
2843
2844 encode_compound_hdr(xdr, req, &hdr);
2845 encode_sequence(xdr, &args->seq_args, &hdr);
2846 encode_reclaim_complete(xdr, args, &hdr);
2847 encode_nops(&hdr);
2848 }
2849
2850 /*
2851 * Encode GETDEVICELIST request
2852 */
2853 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2854 struct xdr_stream *xdr,
2855 struct nfs4_getdevicelist_args *args)
2856 {
2857 struct compound_hdr hdr = {
2858 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859 };
2860
2861 encode_compound_hdr(xdr, req, &hdr);
2862 encode_sequence(xdr, &args->seq_args, &hdr);
2863 encode_putfh(xdr, args->fh, &hdr);
2864 encode_getdevicelist(xdr, args, &hdr);
2865 encode_nops(&hdr);
2866 }
2867
2868 /*
2869 * Encode GETDEVICEINFO request
2870 */
2871 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2872 struct xdr_stream *xdr,
2873 struct nfs4_getdeviceinfo_args *args)
2874 {
2875 struct compound_hdr hdr = {
2876 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2877 };
2878
2879 encode_compound_hdr(xdr, req, &hdr);
2880 encode_sequence(xdr, &args->seq_args, &hdr);
2881 encode_getdeviceinfo(xdr, args, &hdr);
2882
2883 /* set up reply kvec. Subtract notification bitmap max size (2)
2884 * so that notification bitmap is put in xdr_buf tail */
2885 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2886 args->pdev->pages, args->pdev->pgbase,
2887 args->pdev->pglen);
2888
2889 encode_nops(&hdr);
2890 }
2891
2892 /*
2893 * Encode LAYOUTGET request
2894 */
2895 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2896 struct xdr_stream *xdr,
2897 struct nfs4_layoutget_args *args)
2898 {
2899 struct compound_hdr hdr = {
2900 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2901 };
2902
2903 encode_compound_hdr(xdr, req, &hdr);
2904 encode_sequence(xdr, &args->seq_args, &hdr);
2905 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2906 encode_layoutget(xdr, args, &hdr);
2907
2908 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2909 args->layout.pages, 0, args->layout.pglen);
2910
2911 encode_nops(&hdr);
2912 }
2913
2914 /*
2915 * Encode LAYOUTCOMMIT request
2916 */
2917 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2918 struct xdr_stream *xdr,
2919 struct nfs4_layoutcommit_args *args)
2920 {
2921 struct nfs4_layoutcommit_data *data =
2922 container_of(args, struct nfs4_layoutcommit_data, args);
2923 struct compound_hdr hdr = {
2924 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925 };
2926
2927 encode_compound_hdr(xdr, req, &hdr);
2928 encode_sequence(xdr, &args->seq_args, &hdr);
2929 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2930 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2931 encode_getfattr(xdr, args->bitmask, &hdr);
2932 encode_nops(&hdr);
2933 }
2934
2935 /*
2936 * Encode LAYOUTRETURN request
2937 */
2938 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2939 struct xdr_stream *xdr,
2940 struct nfs4_layoutreturn_args *args)
2941 {
2942 struct compound_hdr hdr = {
2943 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2944 };
2945
2946 encode_compound_hdr(xdr, req, &hdr);
2947 encode_sequence(xdr, &args->seq_args, &hdr);
2948 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2949 encode_layoutreturn(xdr, args, &hdr);
2950 encode_nops(&hdr);
2951 }
2952
2953 /*
2954 * Encode SECINFO_NO_NAME request
2955 */
2956 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2957 struct xdr_stream *xdr,
2958 struct nfs41_secinfo_no_name_args *args)
2959 {
2960 struct compound_hdr hdr = {
2961 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2962 };
2963
2964 encode_compound_hdr(xdr, req, &hdr);
2965 encode_sequence(xdr, &args->seq_args, &hdr);
2966 encode_putrootfh(xdr, &hdr);
2967 encode_secinfo_no_name(xdr, args, &hdr);
2968 encode_nops(&hdr);
2969 return 0;
2970 }
2971
2972 /*
2973 * Encode TEST_STATEID request
2974 */
2975 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2976 struct xdr_stream *xdr,
2977 struct nfs41_test_stateid_args *args)
2978 {
2979 struct compound_hdr hdr = {
2980 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2981 };
2982
2983 encode_compound_hdr(xdr, req, &hdr);
2984 encode_sequence(xdr, &args->seq_args, &hdr);
2985 encode_test_stateid(xdr, args, &hdr);
2986 encode_nops(&hdr);
2987 }
2988
2989 /*
2990 * Encode FREE_STATEID request
2991 */
2992 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2993 struct xdr_stream *xdr,
2994 struct nfs41_free_stateid_args *args)
2995 {
2996 struct compound_hdr hdr = {
2997 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2998 };
2999
3000 encode_compound_hdr(xdr, req, &hdr);
3001 encode_sequence(xdr, &args->seq_args, &hdr);
3002 encode_free_stateid(xdr, args, &hdr);
3003 encode_nops(&hdr);
3004 }
3005 #endif /* CONFIG_NFS_V4_1 */
3006
3007 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3008 {
3009 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3010 "Remaining buffer length is %tu words.\n",
3011 func, xdr->end - xdr->p);
3012 }
3013
3014 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3015 {
3016 __be32 *p;
3017
3018 p = xdr_inline_decode(xdr, 4);
3019 if (unlikely(!p))
3020 goto out_overflow;
3021 *len = be32_to_cpup(p);
3022 p = xdr_inline_decode(xdr, *len);
3023 if (unlikely(!p))
3024 goto out_overflow;
3025 *string = (char *)p;
3026 return 0;
3027 out_overflow:
3028 print_overflow_msg(__func__, xdr);
3029 return -EIO;
3030 }
3031
3032 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3033 {
3034 __be32 *p;
3035
3036 p = xdr_inline_decode(xdr, 8);
3037 if (unlikely(!p))
3038 goto out_overflow;
3039 hdr->status = be32_to_cpup(p++);
3040 hdr->taglen = be32_to_cpup(p);
3041
3042 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3043 if (unlikely(!p))
3044 goto out_overflow;
3045 hdr->tag = (char *)p;
3046 p += XDR_QUADLEN(hdr->taglen);
3047 hdr->nops = be32_to_cpup(p);
3048 if (unlikely(hdr->nops < 1))
3049 return nfs4_stat_to_errno(hdr->status);
3050 return 0;
3051 out_overflow:
3052 print_overflow_msg(__func__, xdr);
3053 return -EIO;
3054 }
3055
3056 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3057 {
3058 __be32 *p;
3059 uint32_t opnum;
3060 int32_t nfserr;
3061
3062 p = xdr_inline_decode(xdr, 8);
3063 if (unlikely(!p))
3064 goto out_overflow;
3065 opnum = be32_to_cpup(p++);
3066 if (opnum != expected) {
3067 dprintk("nfs: Server returned operation"
3068 " %d but we issued a request for %d\n",
3069 opnum, expected);
3070 return -EIO;
3071 }
3072 nfserr = be32_to_cpup(p);
3073 if (nfserr != NFS_OK)
3074 return nfs4_stat_to_errno(nfserr);
3075 return 0;
3076 out_overflow:
3077 print_overflow_msg(__func__, xdr);
3078 return -EIO;
3079 }
3080
3081 /* Dummy routine */
3082 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3083 {
3084 __be32 *p;
3085 unsigned int strlen;
3086 char *str;
3087
3088 p = xdr_inline_decode(xdr, 12);
3089 if (likely(p))
3090 return decode_opaque_inline(xdr, &strlen, &str);
3091 print_overflow_msg(__func__, xdr);
3092 return -EIO;
3093 }
3094
3095 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3096 {
3097 uint32_t bmlen;
3098 __be32 *p;
3099
3100 p = xdr_inline_decode(xdr, 4);
3101 if (unlikely(!p))
3102 goto out_overflow;
3103 bmlen = be32_to_cpup(p);
3104
3105 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3106 p = xdr_inline_decode(xdr, (bmlen << 2));
3107 if (unlikely(!p))
3108 goto out_overflow;
3109 if (bmlen > 0) {
3110 bitmap[0] = be32_to_cpup(p++);
3111 if (bmlen > 1) {
3112 bitmap[1] = be32_to_cpup(p++);
3113 if (bmlen > 2)
3114 bitmap[2] = be32_to_cpup(p);
3115 }
3116 }
3117 return 0;
3118 out_overflow:
3119 print_overflow_msg(__func__, xdr);
3120 return -EIO;
3121 }
3122
3123 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3124 {
3125 __be32 *p;
3126
3127 p = xdr_inline_decode(xdr, 4);
3128 if (unlikely(!p))
3129 goto out_overflow;
3130 *attrlen = be32_to_cpup(p);
3131 *savep = xdr_stream_pos(xdr);
3132 return 0;
3133 out_overflow:
3134 print_overflow_msg(__func__, xdr);
3135 return -EIO;
3136 }
3137
3138 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3139 {
3140 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3141 int ret;
3142 ret = decode_attr_bitmap(xdr, bitmask);
3143 if (unlikely(ret < 0))
3144 return ret;
3145 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3146 } else
3147 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3148 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3149 bitmask[0], bitmask[1], bitmask[2]);
3150 return 0;
3151 }
3152
3153 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3154 {
3155 __be32 *p;
3156 int ret = 0;
3157
3158 *type = 0;
3159 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3160 return -EIO;
3161 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3162 p = xdr_inline_decode(xdr, 4);
3163 if (unlikely(!p))
3164 goto out_overflow;
3165 *type = be32_to_cpup(p);
3166 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3167 dprintk("%s: bad type %d\n", __func__, *type);
3168 return -EIO;
3169 }
3170 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3171 ret = NFS_ATTR_FATTR_TYPE;
3172 }
3173 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3174 return ret;
3175 out_overflow:
3176 print_overflow_msg(__func__, xdr);
3177 return -EIO;
3178 }
3179
3180 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3181 uint32_t *bitmap, uint32_t *type)
3182 {
3183 __be32 *p;
3184
3185 *type = 0;
3186 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3187 return -EIO;
3188 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3189 p = xdr_inline_decode(xdr, 4);
3190 if (unlikely(!p))
3191 goto out_overflow;
3192 *type = be32_to_cpup(p);
3193 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3194 }
3195 dprintk("%s: expire type=0x%x\n", __func__, *type);
3196 return 0;
3197 out_overflow:
3198 print_overflow_msg(__func__, xdr);
3199 return -EIO;
3200 }
3201
3202 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3203 {
3204 __be32 *p;
3205 int ret = 0;
3206
3207 *change = 0;
3208 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3209 return -EIO;
3210 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3211 p = xdr_inline_decode(xdr, 8);
3212 if (unlikely(!p))
3213 goto out_overflow;
3214 xdr_decode_hyper(p, change);
3215 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3216 ret = NFS_ATTR_FATTR_CHANGE;
3217 }
3218 dprintk("%s: change attribute=%Lu\n", __func__,
3219 (unsigned long long)*change);
3220 return ret;
3221 out_overflow:
3222 print_overflow_msg(__func__, xdr);
3223 return -EIO;
3224 }
3225
3226 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3227 {
3228 __be32 *p;
3229 int ret = 0;
3230
3231 *size = 0;
3232 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3233 return -EIO;
3234 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3235 p = xdr_inline_decode(xdr, 8);
3236 if (unlikely(!p))
3237 goto out_overflow;
3238 xdr_decode_hyper(p, size);
3239 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3240 ret = NFS_ATTR_FATTR_SIZE;
3241 }
3242 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3243 return ret;
3244 out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247 }
3248
3249 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3250 {
3251 __be32 *p;
3252
3253 *res = 0;
3254 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3255 return -EIO;
3256 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3257 p = xdr_inline_decode(xdr, 4);
3258 if (unlikely(!p))
3259 goto out_overflow;
3260 *res = be32_to_cpup(p);
3261 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3262 }
3263 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3264 return 0;
3265 out_overflow:
3266 print_overflow_msg(__func__, xdr);
3267 return -EIO;
3268 }
3269
3270 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3271 {
3272 __be32 *p;
3273
3274 *res = 0;
3275 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3276 return -EIO;
3277 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3278 p = xdr_inline_decode(xdr, 4);
3279 if (unlikely(!p))
3280 goto out_overflow;
3281 *res = be32_to_cpup(p);
3282 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3283 }
3284 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3285 return 0;
3286 out_overflow:
3287 print_overflow_msg(__func__, xdr);
3288 return -EIO;
3289 }
3290
3291 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3292 {
3293 __be32 *p;
3294 int ret = 0;
3295
3296 fsid->major = 0;
3297 fsid->minor = 0;
3298 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3299 return -EIO;
3300 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3301 p = xdr_inline_decode(xdr, 16);
3302 if (unlikely(!p))
3303 goto out_overflow;
3304 p = xdr_decode_hyper(p, &fsid->major);
3305 xdr_decode_hyper(p, &fsid->minor);
3306 bitmap[0] &= ~FATTR4_WORD0_FSID;
3307 ret = NFS_ATTR_FATTR_FSID;
3308 }
3309 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3310 (unsigned long long)fsid->major,
3311 (unsigned long long)fsid->minor);
3312 return ret;
3313 out_overflow:
3314 print_overflow_msg(__func__, xdr);
3315 return -EIO;
3316 }
3317
3318 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3319 {
3320 __be32 *p;
3321
3322 *res = 60;
3323 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3324 return -EIO;
3325 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3326 p = xdr_inline_decode(xdr, 4);
3327 if (unlikely(!p))
3328 goto out_overflow;
3329 *res = be32_to_cpup(p);
3330 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3331 }
3332 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3333 return 0;
3334 out_overflow:
3335 print_overflow_msg(__func__, xdr);
3336 return -EIO;
3337 }
3338
3339 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3340 {
3341 __be32 *p;
3342
3343 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3344 return -EIO;
3345 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3346 p = xdr_inline_decode(xdr, 4);
3347 if (unlikely(!p))
3348 goto out_overflow;
3349 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3350 *res = -be32_to_cpup(p);
3351 }
3352 return 0;
3353 out_overflow:
3354 print_overflow_msg(__func__, xdr);
3355 return -EIO;
3356 }
3357
3358 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3359 {
3360 __be32 *p;
3361 int len;
3362
3363 if (fh != NULL)
3364 memset(fh, 0, sizeof(*fh));
3365
3366 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3367 return -EIO;
3368 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3369 p = xdr_inline_decode(xdr, 4);
3370 if (unlikely(!p))
3371 goto out_overflow;
3372 len = be32_to_cpup(p);
3373 if (len > NFS4_FHSIZE)
3374 return -EIO;
3375 p = xdr_inline_decode(xdr, len);
3376 if (unlikely(!p))
3377 goto out_overflow;
3378 if (fh != NULL) {
3379 memcpy(fh->data, p, len);
3380 fh->size = len;
3381 }
3382 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3383 }
3384 return 0;
3385 out_overflow:
3386 print_overflow_msg(__func__, xdr);
3387 return -EIO;
3388 }
3389
3390 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3391 {
3392 __be32 *p;
3393
3394 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3395 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3396 return -EIO;
3397 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3398 p = xdr_inline_decode(xdr, 4);
3399 if (unlikely(!p))
3400 goto out_overflow;
3401 *res = be32_to_cpup(p);
3402 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3403 }
3404 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3405 return 0;
3406 out_overflow:
3407 print_overflow_msg(__func__, xdr);
3408 return -EIO;
3409 }
3410
3411 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3412 {
3413 __be32 *p;
3414 int ret = 0;
3415
3416 *fileid = 0;
3417 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3418 return -EIO;
3419 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3420 p = xdr_inline_decode(xdr, 8);
3421 if (unlikely(!p))
3422 goto out_overflow;
3423 xdr_decode_hyper(p, fileid);
3424 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3425 ret = NFS_ATTR_FATTR_FILEID;
3426 }
3427 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3428 return ret;
3429 out_overflow:
3430 print_overflow_msg(__func__, xdr);
3431 return -EIO;
3432 }
3433
3434 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3435 {
3436 __be32 *p;
3437 int ret = 0;
3438
3439 *fileid = 0;
3440 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3441 return -EIO;
3442 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3443 p = xdr_inline_decode(xdr, 8);
3444 if (unlikely(!p))
3445 goto out_overflow;
3446 xdr_decode_hyper(p, fileid);
3447 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3448 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3449 }
3450 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3451 return ret;
3452 out_overflow:
3453 print_overflow_msg(__func__, xdr);
3454 return -EIO;
3455 }
3456
3457 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3458 {
3459 __be32 *p;
3460 int status = 0;
3461
3462 *res = 0;
3463 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3464 return -EIO;
3465 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3466 p = xdr_inline_decode(xdr, 8);
3467 if (unlikely(!p))
3468 goto out_overflow;
3469 xdr_decode_hyper(p, res);
3470 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3471 }
3472 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3473 return status;
3474 out_overflow:
3475 print_overflow_msg(__func__, xdr);
3476 return -EIO;
3477 }
3478
3479 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3480 {
3481 __be32 *p;
3482 int status = 0;
3483
3484 *res = 0;
3485 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3486 return -EIO;
3487 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3488 p = xdr_inline_decode(xdr, 8);
3489 if (unlikely(!p))
3490 goto out_overflow;
3491 xdr_decode_hyper(p, res);
3492 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3493 }
3494 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3495 return status;
3496 out_overflow:
3497 print_overflow_msg(__func__, xdr);
3498 return -EIO;
3499 }
3500
3501 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3502 {
3503 __be32 *p;
3504 int status = 0;
3505
3506 *res = 0;
3507 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3508 return -EIO;
3509 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3510 p = xdr_inline_decode(xdr, 8);
3511 if (unlikely(!p))
3512 goto out_overflow;
3513 xdr_decode_hyper(p, res);
3514 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3515 }
3516 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3517 return status;
3518 out_overflow:
3519 print_overflow_msg(__func__, xdr);
3520 return -EIO;
3521 }
3522
3523 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3524 {
3525 u32 n;
3526 __be32 *p;
3527 int status = 0;
3528
3529 p = xdr_inline_decode(xdr, 4);
3530 if (unlikely(!p))
3531 goto out_overflow;
3532 n = be32_to_cpup(p);
3533 if (n == 0)
3534 goto root_path;
3535 dprintk("pathname4: ");
3536 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3537 dprintk("cannot parse %d components in path\n", n);
3538 goto out_eio;
3539 }
3540 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3541 struct nfs4_string *component = &path->components[path->ncomponents];
3542 status = decode_opaque_inline(xdr, &component->len, &component->data);
3543 if (unlikely(status != 0))
3544 goto out_eio;
3545 ifdebug (XDR)
3546 pr_cont("%s%.*s ",
3547 (path->ncomponents != n ? "/ " : ""),
3548 component->len, component->data);
3549 }
3550 out:
3551 return status;
3552 root_path:
3553 /* a root pathname is sent as a zero component4 */
3554 path->ncomponents = 1;
3555 path->components[0].len=0;
3556 path->components[0].data=NULL;
3557 dprintk("pathname4: /\n");
3558 goto out;
3559 out_eio:
3560 dprintk(" status %d", status);
3561 status = -EIO;
3562 goto out;
3563 out_overflow:
3564 print_overflow_msg(__func__, xdr);
3565 return -EIO;
3566 }
3567
3568 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3569 {
3570 int n;
3571 __be32 *p;
3572 int status = -EIO;
3573
3574 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3575 goto out;
3576 status = 0;
3577 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3578 goto out;
3579 status = -EIO;
3580 /* Ignore borken servers that return unrequested attrs */
3581 if (unlikely(res == NULL))
3582 goto out;
3583 dprintk("%s: fsroot:\n", __func__);
3584 status = decode_pathname(xdr, &res->fs_path);
3585 if (unlikely(status != 0))
3586 goto out;
3587 p = xdr_inline_decode(xdr, 4);
3588 if (unlikely(!p))
3589 goto out_overflow;
3590 n = be32_to_cpup(p);
3591 if (n <= 0)
3592 goto out_eio;
3593 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3594 u32 m;
3595 struct nfs4_fs_location *loc;
3596
3597 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3598 break;
3599 loc = &res->locations[res->nlocations];
3600 p = xdr_inline_decode(xdr, 4);
3601 if (unlikely(!p))
3602 goto out_overflow;
3603 m = be32_to_cpup(p);
3604
3605 dprintk("%s: servers:\n", __func__);
3606 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3607 struct nfs4_string *server;
3608
3609 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3610 unsigned int i;
3611 dprintk("%s: using first %u of %u servers "
3612 "returned for location %u\n",
3613 __func__,
3614 NFS4_FS_LOCATION_MAXSERVERS,
3615 m, res->nlocations);
3616 for (i = loc->nservers; i < m; i++) {
3617 unsigned int len;
3618 char *data;
3619 status = decode_opaque_inline(xdr, &len, &data);
3620 if (unlikely(status != 0))
3621 goto out_eio;
3622 }
3623 break;
3624 }
3625 server = &loc->servers[loc->nservers];
3626 status = decode_opaque_inline(xdr, &server->len, &server->data);
3627 if (unlikely(status != 0))
3628 goto out_eio;
3629 dprintk("%s ", server->data);
3630 }
3631 status = decode_pathname(xdr, &loc->rootpath);
3632 if (unlikely(status != 0))
3633 goto out_eio;
3634 }
3635 if (res->nlocations != 0)
3636 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3637 out:
3638 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3639 return status;
3640 out_overflow:
3641 print_overflow_msg(__func__, xdr);
3642 out_eio:
3643 status = -EIO;
3644 goto out;
3645 }
3646
3647 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3648 {
3649 __be32 *p;
3650 int status = 0;
3651
3652 *res = 0;
3653 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3654 return -EIO;
3655 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3656 p = xdr_inline_decode(xdr, 8);
3657 if (unlikely(!p))
3658 goto out_overflow;
3659 xdr_decode_hyper(p, res);
3660 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3661 }
3662 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3663 return status;
3664 out_overflow:
3665 print_overflow_msg(__func__, xdr);
3666 return -EIO;
3667 }
3668
3669 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3670 {
3671 __be32 *p;
3672 int status = 0;
3673
3674 *maxlink = 1;
3675 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3676 return -EIO;
3677 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3678 p = xdr_inline_decode(xdr, 4);
3679 if (unlikely(!p))
3680 goto out_overflow;
3681 *maxlink = be32_to_cpup(p);
3682 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3683 }
3684 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3685 return status;
3686 out_overflow:
3687 print_overflow_msg(__func__, xdr);
3688 return -EIO;
3689 }
3690
3691 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3692 {
3693 __be32 *p;
3694 int status = 0;
3695
3696 *maxname = 1024;
3697 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3698 return -EIO;
3699 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3700 p = xdr_inline_decode(xdr, 4);
3701 if (unlikely(!p))
3702 goto out_overflow;
3703 *maxname = be32_to_cpup(p);
3704 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3705 }
3706 dprintk("%s: maxname=%u\n", __func__, *maxname);
3707 return status;
3708 out_overflow:
3709 print_overflow_msg(__func__, xdr);
3710 return -EIO;
3711 }
3712
3713 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3714 {
3715 __be32 *p;
3716 int status = 0;
3717
3718 *res = 1024;
3719 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3720 return -EIO;
3721 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3722 uint64_t maxread;
3723 p = xdr_inline_decode(xdr, 8);
3724 if (unlikely(!p))
3725 goto out_overflow;
3726 xdr_decode_hyper(p, &maxread);
3727 if (maxread > 0x7FFFFFFF)
3728 maxread = 0x7FFFFFFF;
3729 *res = (uint32_t)maxread;
3730 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3731 }
3732 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3733 return status;
3734 out_overflow:
3735 print_overflow_msg(__func__, xdr);
3736 return -EIO;
3737 }
3738
3739 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3740 {
3741 __be32 *p;
3742 int status = 0;
3743
3744 *res = 1024;
3745 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3746 return -EIO;
3747 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3748 uint64_t maxwrite;
3749 p = xdr_inline_decode(xdr, 8);
3750 if (unlikely(!p))
3751 goto out_overflow;
3752 xdr_decode_hyper(p, &maxwrite);
3753 if (maxwrite > 0x7FFFFFFF)
3754 maxwrite = 0x7FFFFFFF;
3755 *res = (uint32_t)maxwrite;
3756 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3757 }
3758 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3759 return status;
3760 out_overflow:
3761 print_overflow_msg(__func__, xdr);
3762 return -EIO;
3763 }
3764
3765 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3766 {
3767 uint32_t tmp;
3768 __be32 *p;
3769 int ret = 0;
3770
3771 *mode = 0;
3772 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3773 return -EIO;
3774 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3775 p = xdr_inline_decode(xdr, 4);
3776 if (unlikely(!p))
3777 goto out_overflow;
3778 tmp = be32_to_cpup(p);
3779 *mode = tmp & ~S_IFMT;
3780 bitmap[1] &= ~FATTR4_WORD1_MODE;
3781 ret = NFS_ATTR_FATTR_MODE;
3782 }
3783 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3784 return ret;
3785 out_overflow:
3786 print_overflow_msg(__func__, xdr);
3787 return -EIO;
3788 }
3789
3790 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3791 {
3792 __be32 *p;
3793 int ret = 0;
3794
3795 *nlink = 1;
3796 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3799 p = xdr_inline_decode(xdr, 4);
3800 if (unlikely(!p))
3801 goto out_overflow;
3802 *nlink = be32_to_cpup(p);
3803 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3804 ret = NFS_ATTR_FATTR_NLINK;
3805 }
3806 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3807 return ret;
3808 out_overflow:
3809 print_overflow_msg(__func__, xdr);
3810 return -EIO;
3811 }
3812
3813 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3814 const struct nfs_server *server, kuid_t *uid,
3815 struct nfs4_string *owner_name)
3816 {
3817 uint32_t len;
3818 __be32 *p;
3819 int ret = 0;
3820
3821 *uid = make_kuid(&init_user_ns, -2);
3822 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3823 return -EIO;
3824 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3825 p = xdr_inline_decode(xdr, 4);
3826 if (unlikely(!p))
3827 goto out_overflow;
3828 len = be32_to_cpup(p);
3829 p = xdr_inline_decode(xdr, len);
3830 if (unlikely(!p))
3831 goto out_overflow;
3832 if (owner_name != NULL) {
3833 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3834 if (owner_name->data != NULL) {
3835 owner_name->len = len;
3836 ret = NFS_ATTR_FATTR_OWNER_NAME;
3837 }
3838 } else if (len < XDR_MAX_NETOBJ) {
3839 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3840 ret = NFS_ATTR_FATTR_OWNER;
3841 else
3842 dprintk("%s: nfs_map_name_to_uid failed!\n",
3843 __func__);
3844 } else
3845 dprintk("%s: name too long (%u)!\n",
3846 __func__, len);
3847 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3848 }
3849 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3850 return ret;
3851 out_overflow:
3852 print_overflow_msg(__func__, xdr);
3853 return -EIO;
3854 }
3855
3856 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3857 const struct nfs_server *server, kgid_t *gid,
3858 struct nfs4_string *group_name)
3859 {
3860 uint32_t len;
3861 __be32 *p;
3862 int ret = 0;
3863
3864 *gid = make_kgid(&init_user_ns, -2);
3865 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3866 return -EIO;
3867 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3868 p = xdr_inline_decode(xdr, 4);
3869 if (unlikely(!p))
3870 goto out_overflow;
3871 len = be32_to_cpup(p);
3872 p = xdr_inline_decode(xdr, len);
3873 if (unlikely(!p))
3874 goto out_overflow;
3875 if (group_name != NULL) {
3876 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3877 if (group_name->data != NULL) {
3878 group_name->len = len;
3879 ret = NFS_ATTR_FATTR_GROUP_NAME;
3880 }
3881 } else if (len < XDR_MAX_NETOBJ) {
3882 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3883 ret = NFS_ATTR_FATTR_GROUP;
3884 else
3885 dprintk("%s: nfs_map_group_to_gid failed!\n",
3886 __func__);
3887 } else
3888 dprintk("%s: name too long (%u)!\n",
3889 __func__, len);
3890 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3891 }
3892 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3893 return ret;
3894 out_overflow:
3895 print_overflow_msg(__func__, xdr);
3896 return -EIO;
3897 }
3898
3899 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3900 {
3901 uint32_t major = 0, minor = 0;
3902 __be32 *p;
3903 int ret = 0;
3904
3905 *rdev = MKDEV(0,0);
3906 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3907 return -EIO;
3908 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3909 dev_t tmp;
3910
3911 p = xdr_inline_decode(xdr, 8);
3912 if (unlikely(!p))
3913 goto out_overflow;
3914 major = be32_to_cpup(p++);
3915 minor = be32_to_cpup(p);
3916 tmp = MKDEV(major, minor);
3917 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3918 *rdev = tmp;
3919 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3920 ret = NFS_ATTR_FATTR_RDEV;
3921 }
3922 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3923 return ret;
3924 out_overflow:
3925 print_overflow_msg(__func__, xdr);
3926 return -EIO;
3927 }
3928
3929 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3930 {
3931 __be32 *p;
3932 int status = 0;
3933
3934 *res = 0;
3935 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3936 return -EIO;
3937 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3938 p = xdr_inline_decode(xdr, 8);
3939 if (unlikely(!p))
3940 goto out_overflow;
3941 xdr_decode_hyper(p, res);
3942 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3943 }
3944 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3945 return status;
3946 out_overflow:
3947 print_overflow_msg(__func__, xdr);
3948 return -EIO;
3949 }
3950
3951 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3952 {
3953 __be32 *p;
3954 int status = 0;
3955
3956 *res = 0;
3957 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3958 return -EIO;
3959 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3960 p = xdr_inline_decode(xdr, 8);
3961 if (unlikely(!p))
3962 goto out_overflow;
3963 xdr_decode_hyper(p, res);
3964 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3965 }
3966 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3967 return status;
3968 out_overflow:
3969 print_overflow_msg(__func__, xdr);
3970 return -EIO;
3971 }
3972
3973 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3974 {
3975 __be32 *p;
3976 int status = 0;
3977
3978 *res = 0;
3979 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3980 return -EIO;
3981 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3982 p = xdr_inline_decode(xdr, 8);
3983 if (unlikely(!p))
3984 goto out_overflow;
3985 xdr_decode_hyper(p, res);
3986 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3987 }
3988 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3989 return status;
3990 out_overflow:
3991 print_overflow_msg(__func__, xdr);
3992 return -EIO;
3993 }
3994
3995 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3996 {
3997 __be32 *p;
3998 int ret = 0;
3999
4000 *used = 0;
4001 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4002 return -EIO;
4003 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4004 p = xdr_inline_decode(xdr, 8);
4005 if (unlikely(!p))
4006 goto out_overflow;
4007 xdr_decode_hyper(p, used);
4008 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4009 ret = NFS_ATTR_FATTR_SPACE_USED;
4010 }
4011 dprintk("%s: space used=%Lu\n", __func__,
4012 (unsigned long long)*used);
4013 return ret;
4014 out_overflow:
4015 print_overflow_msg(__func__, xdr);
4016 return -EIO;
4017 }
4018
4019 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4020 {
4021 __be32 *p;
4022 uint64_t sec;
4023 uint32_t nsec;
4024
4025 p = xdr_inline_decode(xdr, 12);
4026 if (unlikely(!p))
4027 goto out_overflow;
4028 p = xdr_decode_hyper(p, &sec);
4029 nsec = be32_to_cpup(p);
4030 time->tv_sec = (time_t)sec;
4031 time->tv_nsec = (long)nsec;
4032 return 0;
4033 out_overflow:
4034 print_overflow_msg(__func__, xdr);
4035 return -EIO;
4036 }
4037
4038 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4039 {
4040 int status = 0;
4041
4042 time->tv_sec = 0;
4043 time->tv_nsec = 0;
4044 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4045 return -EIO;
4046 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4047 status = decode_attr_time(xdr, time);
4048 if (status == 0)
4049 status = NFS_ATTR_FATTR_ATIME;
4050 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4051 }
4052 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4053 return status;
4054 }
4055
4056 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4057 {
4058 int status = 0;
4059
4060 time->tv_sec = 0;
4061 time->tv_nsec = 0;
4062 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4063 return -EIO;
4064 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4065 status = decode_attr_time(xdr, time);
4066 if (status == 0)
4067 status = NFS_ATTR_FATTR_CTIME;
4068 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4069 }
4070 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4071 return status;
4072 }
4073
4074 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4075 struct timespec *time)
4076 {
4077 int status = 0;
4078
4079 time->tv_sec = 0;
4080 time->tv_nsec = 0;
4081 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4082 return -EIO;
4083 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4084 status = decode_attr_time(xdr, time);
4085 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4086 }
4087 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4088 (long)time->tv_nsec);
4089 return status;
4090 }
4091
4092 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4093 struct nfs4_label *label)
4094 {
4095 uint32_t pi = 0;
4096 uint32_t lfs = 0;
4097 __u32 len;
4098 __be32 *p;
4099 int status = 0;
4100
4101 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4102 return -EIO;
4103 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4104 p = xdr_inline_decode(xdr, 4);
4105 if (unlikely(!p))
4106 goto out_overflow;
4107 lfs = be32_to_cpup(p++);
4108 p = xdr_inline_decode(xdr, 4);
4109 if (unlikely(!p))
4110 goto out_overflow;
4111 pi = be32_to_cpup(p++);
4112 p = xdr_inline_decode(xdr, 4);
4113 if (unlikely(!p))
4114 goto out_overflow;
4115 len = be32_to_cpup(p++);
4116 p = xdr_inline_decode(xdr, len);
4117 if (unlikely(!p))
4118 goto out_overflow;
4119 if (len < NFS4_MAXLABELLEN) {
4120 if (label) {
4121 memcpy(label->label, p, len);
4122 label->len = len;
4123 label->pi = pi;
4124 label->lfs = lfs;
4125 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4126 }
4127 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4128 } else
4129 printk(KERN_WARNING "%s: label too long (%u)!\n",
4130 __func__, len);
4131 }
4132 if (label && label->label)
4133 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4134 (char *)label->label, label->len, label->pi, label->lfs);
4135 return status;
4136
4137 out_overflow:
4138 print_overflow_msg(__func__, xdr);
4139 return -EIO;
4140 }
4141
4142 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4143 {
4144 int status = 0;
4145
4146 time->tv_sec = 0;
4147 time->tv_nsec = 0;
4148 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4149 return -EIO;
4150 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4151 status = decode_attr_time(xdr, time);
4152 if (status == 0)
4153 status = NFS_ATTR_FATTR_MTIME;
4154 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4155 }
4156 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4157 return status;
4158 }
4159
4160 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4161 {
4162 unsigned int attrwords = XDR_QUADLEN(attrlen);
4163 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4164
4165 if (unlikely(attrwords != nwords)) {
4166 dprintk("%s: server returned incorrect attribute length: "
4167 "%u %c %u\n",
4168 __func__,
4169 attrwords << 2,
4170 (attrwords < nwords) ? '<' : '>',
4171 nwords << 2);
4172 return -EIO;
4173 }
4174 return 0;
4175 }
4176
4177 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4178 {
4179 __be32 *p;
4180
4181 p = xdr_inline_decode(xdr, 20);
4182 if (unlikely(!p))
4183 goto out_overflow;
4184 cinfo->atomic = be32_to_cpup(p++);
4185 p = xdr_decode_hyper(p, &cinfo->before);
4186 xdr_decode_hyper(p, &cinfo->after);
4187 return 0;
4188 out_overflow:
4189 print_overflow_msg(__func__, xdr);
4190 return -EIO;
4191 }
4192
4193 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4194 {
4195 __be32 *p;
4196 uint32_t supp, acc;
4197 int status;
4198
4199 status = decode_op_hdr(xdr, OP_ACCESS);
4200 if (status)
4201 return status;
4202 p = xdr_inline_decode(xdr, 8);
4203 if (unlikely(!p))
4204 goto out_overflow;
4205 supp = be32_to_cpup(p++);
4206 acc = be32_to_cpup(p);
4207 *supported = supp;
4208 *access = acc;
4209 return 0;
4210 out_overflow:
4211 print_overflow_msg(__func__, xdr);
4212 return -EIO;
4213 }
4214
4215 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4216 {
4217 __be32 *p;
4218
4219 p = xdr_inline_decode(xdr, len);
4220 if (likely(p)) {
4221 memcpy(buf, p, len);
4222 return 0;
4223 }
4224 print_overflow_msg(__func__, xdr);
4225 return -EIO;
4226 }
4227
4228 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4229 {
4230 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4231 }
4232
4233 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4234 {
4235 int status;
4236
4237 status = decode_op_hdr(xdr, OP_CLOSE);
4238 if (status != -EIO)
4239 nfs_increment_open_seqid(status, res->seqid);
4240 if (!status)
4241 status = decode_stateid(xdr, &res->stateid);
4242 return status;
4243 }
4244
4245 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4246 {
4247 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4248 }
4249
4250 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4251 {
4252 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4253 }
4254
4255 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4256 {
4257 int status;
4258
4259 status = decode_op_hdr(xdr, OP_COMMIT);
4260 if (!status)
4261 status = decode_write_verifier(xdr, &res->verf->verifier);
4262 return status;
4263 }
4264
4265 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4266 {
4267 __be32 *p;
4268 uint32_t bmlen;
4269 int status;
4270
4271 status = decode_op_hdr(xdr, OP_CREATE);
4272 if (status)
4273 return status;
4274 if ((status = decode_change_info(xdr, cinfo)))
4275 return status;
4276 p = xdr_inline_decode(xdr, 4);
4277 if (unlikely(!p))
4278 goto out_overflow;
4279 bmlen = be32_to_cpup(p);
4280 p = xdr_inline_decode(xdr, bmlen << 2);
4281 if (likely(p))
4282 return 0;
4283 out_overflow:
4284 print_overflow_msg(__func__, xdr);
4285 return -EIO;
4286 }
4287
4288 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4289 {
4290 unsigned int savep;
4291 uint32_t attrlen, bitmap[3] = {0};
4292 int status;
4293
4294 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4295 goto xdr_error;
4296 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4297 goto xdr_error;
4298 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4299 goto xdr_error;
4300 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4301 goto xdr_error;
4302 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4303 &res->fh_expire_type)) != 0)
4304 goto xdr_error;
4305 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4306 goto xdr_error;
4307 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4308 goto xdr_error;
4309 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4310 goto xdr_error;
4311 status = verify_attr_len(xdr, savep, attrlen);
4312 xdr_error:
4313 dprintk("%s: xdr returned %d!\n", __func__, -status);
4314 return status;
4315 }
4316
4317 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4318 {
4319 unsigned int savep;
4320 uint32_t attrlen, bitmap[3] = {0};
4321 int status;
4322
4323 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4324 goto xdr_error;
4325 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4326 goto xdr_error;
4327 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4328 goto xdr_error;
4329
4330 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4331 goto xdr_error;
4332 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4333 goto xdr_error;
4334 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4335 goto xdr_error;
4336 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4337 goto xdr_error;
4338 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4339 goto xdr_error;
4340 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4341 goto xdr_error;
4342
4343 status = verify_attr_len(xdr, savep, attrlen);
4344 xdr_error:
4345 dprintk("%s: xdr returned %d!\n", __func__, -status);
4346 return status;
4347 }
4348
4349 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4350 {
4351 unsigned int savep;
4352 uint32_t attrlen, bitmap[3] = {0};
4353 int status;
4354
4355 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4356 goto xdr_error;
4357 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4360 goto xdr_error;
4361
4362 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4363 goto xdr_error;
4364 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4365 goto xdr_error;
4366
4367 status = verify_attr_len(xdr, savep, attrlen);
4368 xdr_error:
4369 dprintk("%s: xdr returned %d!\n", __func__, -status);
4370 return status;
4371 }
4372
4373 static int decode_threshold_hint(struct xdr_stream *xdr,
4374 uint32_t *bitmap,
4375 uint64_t *res,
4376 uint32_t hint_bit)
4377 {
4378 __be32 *p;
4379
4380 *res = 0;
4381 if (likely(bitmap[0] & hint_bit)) {
4382 p = xdr_inline_decode(xdr, 8);
4383 if (unlikely(!p))
4384 goto out_overflow;
4385 xdr_decode_hyper(p, res);
4386 }
4387 return 0;
4388 out_overflow:
4389 print_overflow_msg(__func__, xdr);
4390 return -EIO;
4391 }
4392
4393 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4394 struct nfs4_threshold *res)
4395 {
4396 __be32 *p;
4397 unsigned int savep;
4398 uint32_t bitmap[3] = {0,}, attrlen;
4399 int status;
4400
4401 /* layout type */
4402 p = xdr_inline_decode(xdr, 4);
4403 if (unlikely(!p)) {
4404 print_overflow_msg(__func__, xdr);
4405 return -EIO;
4406 }
4407 res->l_type = be32_to_cpup(p);
4408
4409 /* thi_hintset bitmap */
4410 status = decode_attr_bitmap(xdr, bitmap);
4411 if (status < 0)
4412 goto xdr_error;
4413
4414 /* thi_hintlist length */
4415 status = decode_attr_length(xdr, &attrlen, &savep);
4416 if (status < 0)
4417 goto xdr_error;
4418 /* thi_hintlist */
4419 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4420 if (status < 0)
4421 goto xdr_error;
4422 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4423 if (status < 0)
4424 goto xdr_error;
4425 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4426 THRESHOLD_RD_IO);
4427 if (status < 0)
4428 goto xdr_error;
4429 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4430 THRESHOLD_WR_IO);
4431 if (status < 0)
4432 goto xdr_error;
4433
4434 status = verify_attr_len(xdr, savep, attrlen);
4435 res->bm = bitmap[0];
4436
4437 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4438 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4439 res->wr_io_sz);
4440 xdr_error:
4441 dprintk("%s ret=%d!\n", __func__, status);
4442 return status;
4443 }
4444
4445 /*
4446 * Thresholds on pNFS direct I/O vrs MDS I/O
4447 */
4448 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4449 uint32_t *bitmap,
4450 struct nfs4_threshold *res)
4451 {
4452 __be32 *p;
4453 int status = 0;
4454 uint32_t num;
4455
4456 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4457 return -EIO;
4458 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4459 /* Did the server return an unrequested attribute? */
4460 if (unlikely(res == NULL))
4461 return -EREMOTEIO;
4462 p = xdr_inline_decode(xdr, 4);
4463 if (unlikely(!p))
4464 goto out_overflow;
4465 num = be32_to_cpup(p);
4466 if (num == 0)
4467 return 0;
4468 if (num > 1)
4469 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4470 "drivers per filesystem not supported\n",
4471 __func__);
4472
4473 status = decode_first_threshold_item4(xdr, res);
4474 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4475 }
4476 return status;
4477 out_overflow:
4478 print_overflow_msg(__func__, xdr);
4479 return -EIO;
4480 }
4481
4482 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4483 struct nfs_fattr *fattr, struct nfs_fh *fh,
4484 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4485 const struct nfs_server *server)
4486 {
4487 int status;
4488 umode_t fmode = 0;
4489 uint32_t type;
4490 int32_t err;
4491
4492 status = decode_attr_type(xdr, bitmap, &type);
4493 if (status < 0)
4494 goto xdr_error;
4495 fattr->mode = 0;
4496 if (status != 0) {
4497 fattr->mode |= nfs_type2fmt[type];
4498 fattr->valid |= status;
4499 }
4500
4501 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4502 if (status < 0)
4503 goto xdr_error;
4504 fattr->valid |= status;
4505
4506 status = decode_attr_size(xdr, bitmap, &fattr->size);
4507 if (status < 0)
4508 goto xdr_error;
4509 fattr->valid |= status;
4510
4511 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4512 if (status < 0)
4513 goto xdr_error;
4514 fattr->valid |= status;
4515
4516 err = 0;
4517 status = decode_attr_error(xdr, bitmap, &err);
4518 if (status < 0)
4519 goto xdr_error;
4520
4521 status = decode_attr_filehandle(xdr, bitmap, fh);
4522 if (status < 0)
4523 goto xdr_error;
4524
4525 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4526 if (status < 0)
4527 goto xdr_error;
4528 fattr->valid |= status;
4529
4530 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4531 if (status < 0)
4532 goto xdr_error;
4533 fattr->valid |= status;
4534
4535 status = decode_attr_mode(xdr, bitmap, &fmode);
4536 if (status < 0)
4537 goto xdr_error;
4538 if (status != 0) {
4539 fattr->mode |= fmode;
4540 fattr->valid |= status;
4541 }
4542
4543 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4544 if (status < 0)
4545 goto xdr_error;
4546 fattr->valid |= status;
4547
4548 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4549 if (status < 0)
4550 goto xdr_error;
4551 fattr->valid |= status;
4552
4553 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4554 if (status < 0)
4555 goto xdr_error;
4556 fattr->valid |= status;
4557
4558 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4559 if (status < 0)
4560 goto xdr_error;
4561 fattr->valid |= status;
4562
4563 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->valid |= status;
4567
4568 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4569 if (status < 0)
4570 goto xdr_error;
4571 fattr->valid |= status;
4572
4573 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4579 if (status < 0)
4580 goto xdr_error;
4581 fattr->valid |= status;
4582
4583 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4584 if (status < 0)
4585 goto xdr_error;
4586 fattr->valid |= status;
4587
4588 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4589 if (status < 0)
4590 goto xdr_error;
4591
4592 if (label) {
4593 status = decode_attr_security_label(xdr, bitmap, label);
4594 if (status < 0)
4595 goto xdr_error;
4596 fattr->valid |= status;
4597 }
4598
4599 xdr_error:
4600 dprintk("%s: xdr returned %d\n", __func__, -status);
4601 return status;
4602 }
4603
4604 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4605 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4606 struct nfs4_label *label, const struct nfs_server *server)
4607 {
4608 unsigned int savep;
4609 uint32_t attrlen,
4610 bitmap[3] = {0};
4611 int status;
4612
4613 status = decode_op_hdr(xdr, OP_GETATTR);
4614 if (status < 0)
4615 goto xdr_error;
4616
4617 status = decode_attr_bitmap(xdr, bitmap);
4618 if (status < 0)
4619 goto xdr_error;
4620
4621 status = decode_attr_length(xdr, &attrlen, &savep);
4622 if (status < 0)
4623 goto xdr_error;
4624
4625 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4626 label, server);
4627 if (status < 0)
4628 goto xdr_error;
4629
4630 status = verify_attr_len(xdr, savep, attrlen);
4631 xdr_error:
4632 dprintk("%s: xdr returned %d\n", __func__, -status);
4633 return status;
4634 }
4635
4636 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4637 struct nfs4_label *label, const struct nfs_server *server)
4638 {
4639 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4640 }
4641
4642 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4643 const struct nfs_server *server)
4644 {
4645 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4646 }
4647
4648 /*
4649 * Decode potentially multiple layout types. Currently we only support
4650 * one layout driver per file system.
4651 */
4652 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4653 uint32_t *layouttype)
4654 {
4655 __be32 *p;
4656 int num;
4657
4658 p = xdr_inline_decode(xdr, 4);
4659 if (unlikely(!p))
4660 goto out_overflow;
4661 num = be32_to_cpup(p);
4662
4663 /* pNFS is not supported by the underlying file system */
4664 if (num == 0) {
4665 *layouttype = 0;
4666 return 0;
4667 }
4668 if (num > 1)
4669 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4670 "drivers per filesystem not supported\n", __func__);
4671
4672 /* Decode and set first layout type, move xdr->p past unused types */
4673 p = xdr_inline_decode(xdr, num * 4);
4674 if (unlikely(!p))
4675 goto out_overflow;
4676 *layouttype = be32_to_cpup(p);
4677 return 0;
4678 out_overflow:
4679 print_overflow_msg(__func__, xdr);
4680 return -EIO;
4681 }
4682
4683 /*
4684 * The type of file system exported.
4685 * Note we must ensure that layouttype is set in any non-error case.
4686 */
4687 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4688 uint32_t *layouttype)
4689 {
4690 int status = 0;
4691
4692 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4693 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4694 return -EIO;
4695 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4696 status = decode_first_pnfs_layout_type(xdr, layouttype);
4697 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4698 } else
4699 *layouttype = 0;
4700 return status;
4701 }
4702
4703 /*
4704 * The prefered block size for layout directed io
4705 */
4706 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4707 uint32_t *res)
4708 {
4709 __be32 *p;
4710
4711 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4712 *res = 0;
4713 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4714 p = xdr_inline_decode(xdr, 4);
4715 if (unlikely(!p)) {
4716 print_overflow_msg(__func__, xdr);
4717 return -EIO;
4718 }
4719 *res = be32_to_cpup(p);
4720 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4721 }
4722 return 0;
4723 }
4724
4725 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4726 {
4727 unsigned int savep;
4728 uint32_t attrlen, bitmap[3];
4729 int status;
4730
4731 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4732 goto xdr_error;
4733 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4734 goto xdr_error;
4735 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4736 goto xdr_error;
4737
4738 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4739
4740 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4741 goto xdr_error;
4742 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4743 goto xdr_error;
4744 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4745 goto xdr_error;
4746 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4747 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4748 goto xdr_error;
4749 fsinfo->wtpref = fsinfo->wtmax;
4750 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4751 if (status != 0)
4752 goto xdr_error;
4753 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4754 if (status != 0)
4755 goto xdr_error;
4756 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4757 if (status)
4758 goto xdr_error;
4759
4760 status = verify_attr_len(xdr, savep, attrlen);
4761 xdr_error:
4762 dprintk("%s: xdr returned %d!\n", __func__, -status);
4763 return status;
4764 }
4765
4766 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4767 {
4768 __be32 *p;
4769 uint32_t len;
4770 int status;
4771
4772 /* Zero handle first to allow comparisons */
4773 memset(fh, 0, sizeof(*fh));
4774
4775 status = decode_op_hdr(xdr, OP_GETFH);
4776 if (status)
4777 return status;
4778
4779 p = xdr_inline_decode(xdr, 4);
4780 if (unlikely(!p))
4781 goto out_overflow;
4782 len = be32_to_cpup(p);
4783 if (len > NFS4_FHSIZE)
4784 return -EIO;
4785 fh->size = len;
4786 p = xdr_inline_decode(xdr, len);
4787 if (unlikely(!p))
4788 goto out_overflow;
4789 memcpy(fh->data, p, len);
4790 return 0;
4791 out_overflow:
4792 print_overflow_msg(__func__, xdr);
4793 return -EIO;
4794 }
4795
4796 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4797 {
4798 int status;
4799
4800 status = decode_op_hdr(xdr, OP_LINK);
4801 if (status)
4802 return status;
4803 return decode_change_info(xdr, cinfo);
4804 }
4805
4806 /*
4807 * We create the owner, so we know a proper owner.id length is 4.
4808 */
4809 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4810 {
4811 uint64_t offset, length, clientid;
4812 __be32 *p;
4813 uint32_t namelen, type;
4814
4815 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4816 if (unlikely(!p))
4817 goto out_overflow;
4818 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4819 p = xdr_decode_hyper(p, &length);
4820 type = be32_to_cpup(p++); /* 4 byte read */
4821 if (fl != NULL) { /* manipulate file lock */
4822 fl->fl_start = (loff_t)offset;
4823 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4824 if (length == ~(uint64_t)0)
4825 fl->fl_end = OFFSET_MAX;
4826 fl->fl_type = F_WRLCK;
4827 if (type & 1)
4828 fl->fl_type = F_RDLCK;
4829 fl->fl_pid = 0;
4830 }
4831 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4832 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4833 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4834 if (likely(p))
4835 return -NFS4ERR_DENIED;
4836 out_overflow:
4837 print_overflow_msg(__func__, xdr);
4838 return -EIO;
4839 }
4840
4841 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4842 {
4843 int status;
4844
4845 status = decode_op_hdr(xdr, OP_LOCK);
4846 if (status == -EIO)
4847 goto out;
4848 if (status == 0) {
4849 status = decode_stateid(xdr, &res->stateid);
4850 if (unlikely(status))
4851 goto out;
4852 } else if (status == -NFS4ERR_DENIED)
4853 status = decode_lock_denied(xdr, NULL);
4854 if (res->open_seqid != NULL)
4855 nfs_increment_open_seqid(status, res->open_seqid);
4856 nfs_increment_lock_seqid(status, res->lock_seqid);
4857 out:
4858 return status;
4859 }
4860
4861 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4862 {
4863 int status;
4864 status = decode_op_hdr(xdr, OP_LOCKT);
4865 if (status == -NFS4ERR_DENIED)
4866 return decode_lock_denied(xdr, res->denied);
4867 return status;
4868 }
4869
4870 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4871 {
4872 int status;
4873
4874 status = decode_op_hdr(xdr, OP_LOCKU);
4875 if (status != -EIO)
4876 nfs_increment_lock_seqid(status, res->seqid);
4877 if (status == 0)
4878 status = decode_stateid(xdr, &res->stateid);
4879 return status;
4880 }
4881
4882 static int decode_release_lockowner(struct xdr_stream *xdr)
4883 {
4884 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4885 }
4886
4887 static int decode_lookup(struct xdr_stream *xdr)
4888 {
4889 return decode_op_hdr(xdr, OP_LOOKUP);
4890 }
4891
4892 /* This is too sick! */
4893 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4894 {
4895 __be32 *p;
4896 uint32_t limit_type, nblocks, blocksize;
4897
4898 p = xdr_inline_decode(xdr, 12);
4899 if (unlikely(!p))
4900 goto out_overflow;
4901 limit_type = be32_to_cpup(p++);
4902 switch (limit_type) {
4903 case 1:
4904 xdr_decode_hyper(p, maxsize);
4905 break;
4906 case 2:
4907 nblocks = be32_to_cpup(p++);
4908 blocksize = be32_to_cpup(p);
4909 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4910 }
4911 return 0;
4912 out_overflow:
4913 print_overflow_msg(__func__, xdr);
4914 return -EIO;
4915 }
4916
4917 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4918 {
4919 __be32 *p;
4920 uint32_t delegation_type;
4921 int status;
4922
4923 p = xdr_inline_decode(xdr, 4);
4924 if (unlikely(!p))
4925 goto out_overflow;
4926 delegation_type = be32_to_cpup(p);
4927 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4928 res->delegation_type = 0;
4929 return 0;
4930 }
4931 status = decode_stateid(xdr, &res->delegation);
4932 if (unlikely(status))
4933 return status;
4934 p = xdr_inline_decode(xdr, 4);
4935 if (unlikely(!p))
4936 goto out_overflow;
4937 res->do_recall = be32_to_cpup(p);
4938
4939 switch (delegation_type) {
4940 case NFS4_OPEN_DELEGATE_READ:
4941 res->delegation_type = FMODE_READ;
4942 break;
4943 case NFS4_OPEN_DELEGATE_WRITE:
4944 res->delegation_type = FMODE_WRITE|FMODE_READ;
4945 if (decode_space_limit(xdr, &res->maxsize) < 0)
4946 return -EIO;
4947 }
4948 return decode_ace(xdr, NULL, res->server->nfs_client);
4949 out_overflow:
4950 print_overflow_msg(__func__, xdr);
4951 return -EIO;
4952 }
4953
4954 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4955 {
4956 __be32 *p;
4957 uint32_t savewords, bmlen, i;
4958 int status;
4959
4960 status = decode_op_hdr(xdr, OP_OPEN);
4961 if (status != -EIO)
4962 nfs_increment_open_seqid(status, res->seqid);
4963 if (!status)
4964 status = decode_stateid(xdr, &res->stateid);
4965 if (unlikely(status))
4966 return status;
4967
4968 decode_change_info(xdr, &res->cinfo);
4969
4970 p = xdr_inline_decode(xdr, 8);
4971 if (unlikely(!p))
4972 goto out_overflow;
4973 res->rflags = be32_to_cpup(p++);
4974 bmlen = be32_to_cpup(p);
4975 if (bmlen > 10)
4976 goto xdr_error;
4977
4978 p = xdr_inline_decode(xdr, bmlen << 2);
4979 if (unlikely(!p))
4980 goto out_overflow;
4981 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4982 for (i = 0; i < savewords; ++i)
4983 res->attrset[i] = be32_to_cpup(p++);
4984 for (; i < NFS4_BITMAP_SIZE; i++)
4985 res->attrset[i] = 0;
4986
4987 return decode_delegation(xdr, res);
4988 xdr_error:
4989 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4990 return -EIO;
4991 out_overflow:
4992 print_overflow_msg(__func__, xdr);
4993 return -EIO;
4994 }
4995
4996 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4997 {
4998 int status;
4999
5000 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5001 if (status != -EIO)
5002 nfs_increment_open_seqid(status, res->seqid);
5003 if (!status)
5004 status = decode_stateid(xdr, &res->stateid);
5005 return status;
5006 }
5007
5008 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5009 {
5010 int status;
5011
5012 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5013 if (status != -EIO)
5014 nfs_increment_open_seqid(status, res->seqid);
5015 if (!status)
5016 status = decode_stateid(xdr, &res->stateid);
5017 return status;
5018 }
5019
5020 static int decode_putfh(struct xdr_stream *xdr)
5021 {
5022 return decode_op_hdr(xdr, OP_PUTFH);
5023 }
5024
5025 static int decode_putrootfh(struct xdr_stream *xdr)
5026 {
5027 return decode_op_hdr(xdr, OP_PUTROOTFH);
5028 }
5029
5030 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5031 {
5032 __be32 *p;
5033 uint32_t count, eof, recvd;
5034 int status;
5035
5036 status = decode_op_hdr(xdr, OP_READ);
5037 if (status)
5038 return status;
5039 p = xdr_inline_decode(xdr, 8);
5040 if (unlikely(!p))
5041 goto out_overflow;
5042 eof = be32_to_cpup(p++);
5043 count = be32_to_cpup(p);
5044 recvd = xdr_read_pages(xdr, count);
5045 if (count > recvd) {
5046 dprintk("NFS: server cheating in read reply: "
5047 "count %u > recvd %u\n", count, recvd);
5048 count = recvd;
5049 eof = 0;
5050 }
5051 res->eof = eof;
5052 res->count = count;
5053 return 0;
5054 out_overflow:
5055 print_overflow_msg(__func__, xdr);
5056 return -EIO;
5057 }
5058
5059 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5060 {
5061 int status;
5062 __be32 verf[2];
5063
5064 status = decode_op_hdr(xdr, OP_READDIR);
5065 if (!status)
5066 status = decode_verifier(xdr, readdir->verifier.data);
5067 if (unlikely(status))
5068 return status;
5069 memcpy(verf, readdir->verifier.data, sizeof(verf));
5070 dprintk("%s: verifier = %08x:%08x\n",
5071 __func__, verf[0], verf[1]);
5072 return xdr_read_pages(xdr, xdr->buf->page_len);
5073 }
5074
5075 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5076 {
5077 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5078 u32 len, recvd;
5079 __be32 *p;
5080 int status;
5081
5082 status = decode_op_hdr(xdr, OP_READLINK);
5083 if (status)
5084 return status;
5085
5086 /* Convert length of symlink */
5087 p = xdr_inline_decode(xdr, 4);
5088 if (unlikely(!p))
5089 goto out_overflow;
5090 len = be32_to_cpup(p);
5091 if (len >= rcvbuf->page_len || len <= 0) {
5092 dprintk("nfs: server returned giant symlink!\n");
5093 return -ENAMETOOLONG;
5094 }
5095 recvd = xdr_read_pages(xdr, len);
5096 if (recvd < len) {
5097 dprintk("NFS: server cheating in readlink reply: "
5098 "count %u > recvd %u\n", len, recvd);
5099 return -EIO;
5100 }
5101 /*
5102 * The XDR encode routine has set things up so that
5103 * the link text will be copied directly into the
5104 * buffer. We just have to do overflow-checking,
5105 * and and null-terminate the text (the VFS expects
5106 * null-termination).
5107 */
5108 xdr_terminate_string(rcvbuf, len);
5109 return 0;
5110 out_overflow:
5111 print_overflow_msg(__func__, xdr);
5112 return -EIO;
5113 }
5114
5115 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5116 {
5117 int status;
5118
5119 status = decode_op_hdr(xdr, OP_REMOVE);
5120 if (status)
5121 goto out;
5122 status = decode_change_info(xdr, cinfo);
5123 out:
5124 return status;
5125 }
5126
5127 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5128 struct nfs4_change_info *new_cinfo)
5129 {
5130 int status;
5131
5132 status = decode_op_hdr(xdr, OP_RENAME);
5133 if (status)
5134 goto out;
5135 if ((status = decode_change_info(xdr, old_cinfo)))
5136 goto out;
5137 status = decode_change_info(xdr, new_cinfo);
5138 out:
5139 return status;
5140 }
5141
5142 static int decode_renew(struct xdr_stream *xdr)
5143 {
5144 return decode_op_hdr(xdr, OP_RENEW);
5145 }
5146
5147 static int
5148 decode_restorefh(struct xdr_stream *xdr)
5149 {
5150 return decode_op_hdr(xdr, OP_RESTOREFH);
5151 }
5152
5153 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5154 struct nfs_getaclres *res)
5155 {
5156 unsigned int savep;
5157 uint32_t attrlen,
5158 bitmap[3] = {0};
5159 int status;
5160 unsigned int pg_offset;
5161
5162 res->acl_len = 0;
5163 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5164 goto out;
5165
5166 xdr_enter_page(xdr, xdr->buf->page_len);
5167
5168 /* Calculate the offset of the page data */
5169 pg_offset = xdr->buf->head[0].iov_len;
5170
5171 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5172 goto out;
5173 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5174 goto out;
5175
5176 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5177 return -EIO;
5178 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5179
5180 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5181 * are stored with the acl data to handle the problem of
5182 * variable length bitmaps.*/
5183 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5184 res->acl_len = attrlen;
5185
5186 /* Check for receive buffer overflow */
5187 if (res->acl_len > (xdr->nwords << 2) ||
5188 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5189 res->acl_flags |= NFS4_ACL_TRUNC;
5190 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5191 attrlen, xdr->nwords << 2);
5192 }
5193 } else
5194 status = -EOPNOTSUPP;
5195
5196 out:
5197 return status;
5198 }
5199
5200 static int
5201 decode_savefh(struct xdr_stream *xdr)
5202 {
5203 return decode_op_hdr(xdr, OP_SAVEFH);
5204 }
5205
5206 static int decode_setattr(struct xdr_stream *xdr)
5207 {
5208 __be32 *p;
5209 uint32_t bmlen;
5210 int status;
5211
5212 status = decode_op_hdr(xdr, OP_SETATTR);
5213 if (status)
5214 return status;
5215 p = xdr_inline_decode(xdr, 4);
5216 if (unlikely(!p))
5217 goto out_overflow;
5218 bmlen = be32_to_cpup(p);
5219 p = xdr_inline_decode(xdr, bmlen << 2);
5220 if (likely(p))
5221 return 0;
5222 out_overflow:
5223 print_overflow_msg(__func__, xdr);
5224 return -EIO;
5225 }
5226
5227 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5228 {
5229 __be32 *p;
5230 uint32_t opnum;
5231 int32_t nfserr;
5232
5233 p = xdr_inline_decode(xdr, 8);
5234 if (unlikely(!p))
5235 goto out_overflow;
5236 opnum = be32_to_cpup(p++);
5237 if (opnum != OP_SETCLIENTID) {
5238 dprintk("nfs: decode_setclientid: Server returned operation"
5239 " %d\n", opnum);
5240 return -EIO;
5241 }
5242 nfserr = be32_to_cpup(p);
5243 if (nfserr == NFS_OK) {
5244 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5245 if (unlikely(!p))
5246 goto out_overflow;
5247 p = xdr_decode_hyper(p, &res->clientid);
5248 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5249 } else if (nfserr == NFSERR_CLID_INUSE) {
5250 uint32_t len;
5251
5252 /* skip netid string */
5253 p = xdr_inline_decode(xdr, 4);
5254 if (unlikely(!p))
5255 goto out_overflow;
5256 len = be32_to_cpup(p);
5257 p = xdr_inline_decode(xdr, len);
5258 if (unlikely(!p))
5259 goto out_overflow;
5260
5261 /* skip uaddr string */
5262 p = xdr_inline_decode(xdr, 4);
5263 if (unlikely(!p))
5264 goto out_overflow;
5265 len = be32_to_cpup(p);
5266 p = xdr_inline_decode(xdr, len);
5267 if (unlikely(!p))
5268 goto out_overflow;
5269 return -NFSERR_CLID_INUSE;
5270 } else
5271 return nfs4_stat_to_errno(nfserr);
5272
5273 return 0;
5274 out_overflow:
5275 print_overflow_msg(__func__, xdr);
5276 return -EIO;
5277 }
5278
5279 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5280 {
5281 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5282 }
5283
5284 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5285 {
5286 __be32 *p;
5287 int status;
5288
5289 status = decode_op_hdr(xdr, OP_WRITE);
5290 if (status)
5291 return status;
5292
5293 p = xdr_inline_decode(xdr, 8);
5294 if (unlikely(!p))
5295 goto out_overflow;
5296 res->count = be32_to_cpup(p++);
5297 res->verf->committed = be32_to_cpup(p++);
5298 return decode_write_verifier(xdr, &res->verf->verifier);
5299 out_overflow:
5300 print_overflow_msg(__func__, xdr);
5301 return -EIO;
5302 }
5303
5304 static int decode_delegreturn(struct xdr_stream *xdr)
5305 {
5306 return decode_op_hdr(xdr, OP_DELEGRETURN);
5307 }
5308
5309 static int decode_secinfo_gss(struct xdr_stream *xdr,
5310 struct nfs4_secinfo4 *flavor)
5311 {
5312 u32 oid_len;
5313 __be32 *p;
5314
5315 p = xdr_inline_decode(xdr, 4);
5316 if (unlikely(!p))
5317 goto out_overflow;
5318 oid_len = be32_to_cpup(p);
5319 if (oid_len > GSS_OID_MAX_LEN)
5320 goto out_err;
5321
5322 p = xdr_inline_decode(xdr, oid_len);
5323 if (unlikely(!p))
5324 goto out_overflow;
5325 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5326 flavor->flavor_info.oid.len = oid_len;
5327
5328 p = xdr_inline_decode(xdr, 8);
5329 if (unlikely(!p))
5330 goto out_overflow;
5331 flavor->flavor_info.qop = be32_to_cpup(p++);
5332 flavor->flavor_info.service = be32_to_cpup(p);
5333
5334 return 0;
5335
5336 out_overflow:
5337 print_overflow_msg(__func__, xdr);
5338 return -EIO;
5339 out_err:
5340 return -EINVAL;
5341 }
5342
5343 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5344 {
5345 struct nfs4_secinfo4 *sec_flavor;
5346 unsigned int i, num_flavors;
5347 int status;
5348 __be32 *p;
5349
5350 p = xdr_inline_decode(xdr, 4);
5351 if (unlikely(!p))
5352 goto out_overflow;
5353
5354 res->flavors->num_flavors = 0;
5355 num_flavors = be32_to_cpup(p);
5356
5357 for (i = 0; i < num_flavors; i++) {
5358 sec_flavor = &res->flavors->flavors[i];
5359 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5360 break;
5361
5362 p = xdr_inline_decode(xdr, 4);
5363 if (unlikely(!p))
5364 goto out_overflow;
5365 sec_flavor->flavor = be32_to_cpup(p);
5366
5367 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5368 status = decode_secinfo_gss(xdr, sec_flavor);
5369 if (status)
5370 goto out;
5371 }
5372 res->flavors->num_flavors++;
5373 }
5374
5375 status = 0;
5376 out:
5377 return status;
5378 out_overflow:
5379 print_overflow_msg(__func__, xdr);
5380 return -EIO;
5381 }
5382
5383 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5384 {
5385 int status = decode_op_hdr(xdr, OP_SECINFO);
5386 if (status)
5387 return status;
5388 return decode_secinfo_common(xdr, res);
5389 }
5390
5391 #if defined(CONFIG_NFS_V4_1)
5392 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5393 {
5394 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5395 if (status)
5396 return status;
5397 return decode_secinfo_common(xdr, res);
5398 }
5399
5400 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5401 {
5402 __be32 *p;
5403 uint32_t bitmap_words;
5404 unsigned int i;
5405
5406 p = xdr_inline_decode(xdr, 4);
5407 bitmap_words = be32_to_cpup(p++);
5408 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5409 return -EIO;
5410 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5411 for (i = 0; i < bitmap_words; i++)
5412 op_map->u.words[i] = be32_to_cpup(p++);
5413
5414 return 0;
5415 }
5416
5417 static int decode_exchange_id(struct xdr_stream *xdr,
5418 struct nfs41_exchange_id_res *res)
5419 {
5420 __be32 *p;
5421 uint32_t dummy;
5422 char *dummy_str;
5423 int status;
5424 uint32_t impl_id_count;
5425
5426 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5427 if (status)
5428 return status;
5429
5430 p = xdr_inline_decode(xdr, 8);
5431 if (unlikely(!p))
5432 goto out_overflow;
5433 xdr_decode_hyper(p, &res->clientid);
5434 p = xdr_inline_decode(xdr, 12);
5435 if (unlikely(!p))
5436 goto out_overflow;
5437 res->seqid = be32_to_cpup(p++);
5438 res->flags = be32_to_cpup(p++);
5439
5440 res->state_protect.how = be32_to_cpup(p);
5441 switch (res->state_protect.how) {
5442 case SP4_NONE:
5443 break;
5444 case SP4_MACH_CRED:
5445 status = decode_op_map(xdr, &res->state_protect.enforce);
5446 if (status)
5447 return status;
5448 status = decode_op_map(xdr, &res->state_protect.allow);
5449 if (status)
5450 return status;
5451 break;
5452 default:
5453 WARN_ON_ONCE(1);
5454 return -EIO;
5455 }
5456
5457 /* server_owner4.so_minor_id */
5458 p = xdr_inline_decode(xdr, 8);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5462
5463 /* server_owner4.so_major_id */
5464 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5465 if (unlikely(status))
5466 return status;
5467 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5468 return -EIO;
5469 memcpy(res->server_owner->major_id, dummy_str, dummy);
5470 res->server_owner->major_id_sz = dummy;
5471
5472 /* server_scope4 */
5473 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5474 if (unlikely(status))
5475 return status;
5476 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5477 return -EIO;
5478 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5479 res->server_scope->server_scope_sz = dummy;
5480
5481 /* Implementation Id */
5482 p = xdr_inline_decode(xdr, 4);
5483 if (unlikely(!p))
5484 goto out_overflow;
5485 impl_id_count = be32_to_cpup(p++);
5486
5487 if (impl_id_count) {
5488 /* nii_domain */
5489 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5490 if (unlikely(status))
5491 return status;
5492 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5493 return -EIO;
5494 memcpy(res->impl_id->domain, dummy_str, dummy);
5495
5496 /* nii_name */
5497 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5498 if (unlikely(status))
5499 return status;
5500 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5501 return -EIO;
5502 memcpy(res->impl_id->name, dummy_str, dummy);
5503
5504 /* nii_date */
5505 p = xdr_inline_decode(xdr, 12);
5506 if (unlikely(!p))
5507 goto out_overflow;
5508 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5509 res->impl_id->date.nseconds = be32_to_cpup(p);
5510
5511 /* if there's more than one entry, ignore the rest */
5512 }
5513 return 0;
5514 out_overflow:
5515 print_overflow_msg(__func__, xdr);
5516 return -EIO;
5517 }
5518
5519 static int decode_chan_attrs(struct xdr_stream *xdr,
5520 struct nfs4_channel_attrs *attrs)
5521 {
5522 __be32 *p;
5523 u32 nr_attrs, val;
5524
5525 p = xdr_inline_decode(xdr, 28);
5526 if (unlikely(!p))
5527 goto out_overflow;
5528 val = be32_to_cpup(p++); /* headerpadsz */
5529 if (val)
5530 return -EINVAL; /* no support for header padding yet */
5531 attrs->max_rqst_sz = be32_to_cpup(p++);
5532 attrs->max_resp_sz = be32_to_cpup(p++);
5533 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5534 attrs->max_ops = be32_to_cpup(p++);
5535 attrs->max_reqs = be32_to_cpup(p++);
5536 nr_attrs = be32_to_cpup(p);
5537 if (unlikely(nr_attrs > 1)) {
5538 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5539 "count %u\n", __func__, nr_attrs);
5540 return -EINVAL;
5541 }
5542 if (nr_attrs == 1) {
5543 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5544 if (unlikely(!p))
5545 goto out_overflow;
5546 }
5547 return 0;
5548 out_overflow:
5549 print_overflow_msg(__func__, xdr);
5550 return -EIO;
5551 }
5552
5553 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5554 {
5555 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5556 }
5557
5558 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5559 struct nfs41_bind_conn_to_session_res *res)
5560 {
5561 __be32 *p;
5562 int status;
5563
5564 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5565 if (!status)
5566 status = decode_sessionid(xdr, &res->session->sess_id);
5567 if (unlikely(status))
5568 return status;
5569
5570 /* dir flags, rdma mode bool */
5571 p = xdr_inline_decode(xdr, 8);
5572 if (unlikely(!p))
5573 goto out_overflow;
5574
5575 res->dir = be32_to_cpup(p++);
5576 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5577 return -EIO;
5578 if (be32_to_cpup(p) == 0)
5579 res->use_conn_in_rdma_mode = false;
5580 else
5581 res->use_conn_in_rdma_mode = true;
5582
5583 return 0;
5584 out_overflow:
5585 print_overflow_msg(__func__, xdr);
5586 return -EIO;
5587 }
5588
5589 static int decode_create_session(struct xdr_stream *xdr,
5590 struct nfs41_create_session_res *res)
5591 {
5592 __be32 *p;
5593 int status;
5594 struct nfs_client *clp = res->client;
5595 struct nfs4_session *session = clp->cl_session;
5596
5597 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5598 if (!status)
5599 status = decode_sessionid(xdr, &session->sess_id);
5600 if (unlikely(status))
5601 return status;
5602
5603 /* seqid, flags */
5604 p = xdr_inline_decode(xdr, 8);
5605 if (unlikely(!p))
5606 goto out_overflow;
5607 clp->cl_seqid = be32_to_cpup(p++);
5608 session->flags = be32_to_cpup(p);
5609
5610 /* Channel attributes */
5611 status = decode_chan_attrs(xdr, &session->fc_attrs);
5612 if (!status)
5613 status = decode_chan_attrs(xdr, &session->bc_attrs);
5614 return status;
5615 out_overflow:
5616 print_overflow_msg(__func__, xdr);
5617 return -EIO;
5618 }
5619
5620 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5621 {
5622 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5623 }
5624
5625 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5626 {
5627 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5628 }
5629
5630 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5631 {
5632 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5633 }
5634 #endif /* CONFIG_NFS_V4_1 */
5635
5636 static int decode_sequence(struct xdr_stream *xdr,
5637 struct nfs4_sequence_res *res,
5638 struct rpc_rqst *rqstp)
5639 {
5640 #if defined(CONFIG_NFS_V4_1)
5641 struct nfs4_session *session;
5642 struct nfs4_sessionid id;
5643 u32 dummy;
5644 int status;
5645 __be32 *p;
5646
5647 if (res->sr_slot == NULL)
5648 return 0;
5649 if (!res->sr_slot->table->session)
5650 return 0;
5651
5652 status = decode_op_hdr(xdr, OP_SEQUENCE);
5653 if (!status)
5654 status = decode_sessionid(xdr, &id);
5655 if (unlikely(status))
5656 goto out_err;
5657
5658 /*
5659 * If the server returns different values for sessionID, slotID or
5660 * sequence number, the server is looney tunes.
5661 */
5662 status = -EREMOTEIO;
5663 session = res->sr_slot->table->session;
5664
5665 if (memcmp(id.data, session->sess_id.data,
5666 NFS4_MAX_SESSIONID_LEN)) {
5667 dprintk("%s Invalid session id\n", __func__);
5668 goto out_err;
5669 }
5670
5671 p = xdr_inline_decode(xdr, 20);
5672 if (unlikely(!p))
5673 goto out_overflow;
5674
5675 /* seqid */
5676 dummy = be32_to_cpup(p++);
5677 if (dummy != res->sr_slot->seq_nr) {
5678 dprintk("%s Invalid sequence number\n", __func__);
5679 goto out_err;
5680 }
5681 /* slot id */
5682 dummy = be32_to_cpup(p++);
5683 if (dummy != res->sr_slot->slot_nr) {
5684 dprintk("%s Invalid slot id\n", __func__);
5685 goto out_err;
5686 }
5687 /* highest slot id */
5688 res->sr_highest_slotid = be32_to_cpup(p++);
5689 /* target highest slot id */
5690 res->sr_target_highest_slotid = be32_to_cpup(p++);
5691 /* result flags */
5692 res->sr_status_flags = be32_to_cpup(p);
5693 status = 0;
5694 out_err:
5695 res->sr_status = status;
5696 return status;
5697 out_overflow:
5698 print_overflow_msg(__func__, xdr);
5699 status = -EIO;
5700 goto out_err;
5701 #else /* CONFIG_NFS_V4_1 */
5702 return 0;
5703 #endif /* CONFIG_NFS_V4_1 */
5704 }
5705
5706 #if defined(CONFIG_NFS_V4_1)
5707 /*
5708 * TODO: Need to handle case when EOF != true;
5709 */
5710 static int decode_getdevicelist(struct xdr_stream *xdr,
5711 struct pnfs_devicelist *res)
5712 {
5713 __be32 *p;
5714 int status, i;
5715 nfs4_verifier verftemp;
5716
5717 status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5718 if (status)
5719 return status;
5720
5721 p = xdr_inline_decode(xdr, 8 + 8 + 4);
5722 if (unlikely(!p))
5723 goto out_overflow;
5724
5725 /* TODO: Skip cookie for now */
5726 p += 2;
5727
5728 /* Read verifier */
5729 p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5730
5731 res->num_devs = be32_to_cpup(p);
5732
5733 dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5734
5735 if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5736 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5737 __func__, res->num_devs);
5738 return -EIO;
5739 }
5740
5741 p = xdr_inline_decode(xdr,
5742 res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5743 if (unlikely(!p))
5744 goto out_overflow;
5745 for (i = 0; i < res->num_devs; i++)
5746 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5747 NFS4_DEVICEID4_SIZE);
5748 res->eof = be32_to_cpup(p);
5749 return 0;
5750 out_overflow:
5751 print_overflow_msg(__func__, xdr);
5752 return -EIO;
5753 }
5754
5755 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5756 struct pnfs_device *pdev)
5757 {
5758 __be32 *p;
5759 uint32_t len, type;
5760 int status;
5761
5762 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5763 if (status) {
5764 if (status == -ETOOSMALL) {
5765 p = xdr_inline_decode(xdr, 4);
5766 if (unlikely(!p))
5767 goto out_overflow;
5768 pdev->mincount = be32_to_cpup(p);
5769 dprintk("%s: Min count too small. mincnt = %u\n",
5770 __func__, pdev->mincount);
5771 }
5772 return status;
5773 }
5774
5775 p = xdr_inline_decode(xdr, 8);
5776 if (unlikely(!p))
5777 goto out_overflow;
5778 type = be32_to_cpup(p++);
5779 if (type != pdev->layout_type) {
5780 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5781 __func__, pdev->layout_type, type);
5782 return -EINVAL;
5783 }
5784 /*
5785 * Get the length of the opaque device_addr4. xdr_read_pages places
5786 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5787 * and places the remaining xdr data in xdr_buf->tail
5788 */
5789 pdev->mincount = be32_to_cpup(p);
5790 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5791 goto out_overflow;
5792
5793 /* Parse notification bitmap, verifying that it is zero. */
5794 p = xdr_inline_decode(xdr, 4);
5795 if (unlikely(!p))
5796 goto out_overflow;
5797 len = be32_to_cpup(p);
5798 if (len) {
5799 uint32_t i;
5800
5801 p = xdr_inline_decode(xdr, 4 * len);
5802 if (unlikely(!p))
5803 goto out_overflow;
5804 for (i = 0; i < len; i++, p++) {
5805 if (be32_to_cpup(p)) {
5806 dprintk("%s: notifications not supported\n",
5807 __func__);
5808 return -EIO;
5809 }
5810 }
5811 }
5812 return 0;
5813 out_overflow:
5814 print_overflow_msg(__func__, xdr);
5815 return -EIO;
5816 }
5817
5818 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5819 struct nfs4_layoutget_res *res)
5820 {
5821 __be32 *p;
5822 int status;
5823 u32 layout_count;
5824 u32 recvd;
5825
5826 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5827 if (status)
5828 return status;
5829 p = xdr_inline_decode(xdr, 4);
5830 if (unlikely(!p))
5831 goto out_overflow;
5832 res->return_on_close = be32_to_cpup(p);
5833 decode_stateid(xdr, &res->stateid);
5834 p = xdr_inline_decode(xdr, 4);
5835 if (unlikely(!p))
5836 goto out_overflow;
5837 layout_count = be32_to_cpup(p);
5838 if (!layout_count) {
5839 dprintk("%s: server responded with empty layout array\n",
5840 __func__);
5841 return -EINVAL;
5842 }
5843
5844 p = xdr_inline_decode(xdr, 28);
5845 if (unlikely(!p))
5846 goto out_overflow;
5847 p = xdr_decode_hyper(p, &res->range.offset);
5848 p = xdr_decode_hyper(p, &res->range.length);
5849 res->range.iomode = be32_to_cpup(p++);
5850 res->type = be32_to_cpup(p++);
5851 res->layoutp->len = be32_to_cpup(p);
5852
5853 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5854 __func__,
5855 (unsigned long)res->range.offset,
5856 (unsigned long)res->range.length,
5857 res->range.iomode,
5858 res->type,
5859 res->layoutp->len);
5860
5861 recvd = xdr_read_pages(xdr, res->layoutp->len);
5862 if (res->layoutp->len > recvd) {
5863 dprintk("NFS: server cheating in layoutget reply: "
5864 "layout len %u > recvd %u\n",
5865 res->layoutp->len, recvd);
5866 return -EINVAL;
5867 }
5868
5869 if (layout_count > 1) {
5870 /* We only handle a length one array at the moment. Any
5871 * further entries are just ignored. Note that this means
5872 * the client may see a response that is less than the
5873 * minimum it requested.
5874 */
5875 dprintk("%s: server responded with %d layouts, dropping tail\n",
5876 __func__, layout_count);
5877 }
5878
5879 return 0;
5880 out_overflow:
5881 print_overflow_msg(__func__, xdr);
5882 return -EIO;
5883 }
5884
5885 static int decode_layoutreturn(struct xdr_stream *xdr,
5886 struct nfs4_layoutreturn_res *res)
5887 {
5888 __be32 *p;
5889 int status;
5890
5891 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5892 if (status)
5893 return status;
5894 p = xdr_inline_decode(xdr, 4);
5895 if (unlikely(!p))
5896 goto out_overflow;
5897 res->lrs_present = be32_to_cpup(p);
5898 if (res->lrs_present)
5899 status = decode_stateid(xdr, &res->stateid);
5900 return status;
5901 out_overflow:
5902 print_overflow_msg(__func__, xdr);
5903 return -EIO;
5904 }
5905
5906 static int decode_layoutcommit(struct xdr_stream *xdr,
5907 struct rpc_rqst *req,
5908 struct nfs4_layoutcommit_res *res)
5909 {
5910 __be32 *p;
5911 __u32 sizechanged;
5912 int status;
5913
5914 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5915 res->status = status;
5916 if (status)
5917 return status;
5918
5919 p = xdr_inline_decode(xdr, 4);
5920 if (unlikely(!p))
5921 goto out_overflow;
5922 sizechanged = be32_to_cpup(p);
5923
5924 if (sizechanged) {
5925 /* throw away new size */
5926 p = xdr_inline_decode(xdr, 8);
5927 if (unlikely(!p))
5928 goto out_overflow;
5929 }
5930 return 0;
5931 out_overflow:
5932 print_overflow_msg(__func__, xdr);
5933 return -EIO;
5934 }
5935
5936 static int decode_test_stateid(struct xdr_stream *xdr,
5937 struct nfs41_test_stateid_res *res)
5938 {
5939 __be32 *p;
5940 int status;
5941 int num_res;
5942
5943 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5944 if (status)
5945 return status;
5946
5947 p = xdr_inline_decode(xdr, 4);
5948 if (unlikely(!p))
5949 goto out_overflow;
5950 num_res = be32_to_cpup(p++);
5951 if (num_res != 1)
5952 goto out;
5953
5954 p = xdr_inline_decode(xdr, 4);
5955 if (unlikely(!p))
5956 goto out_overflow;
5957 res->status = be32_to_cpup(p++);
5958
5959 return status;
5960 out_overflow:
5961 print_overflow_msg(__func__, xdr);
5962 out:
5963 return -EIO;
5964 }
5965
5966 static int decode_free_stateid(struct xdr_stream *xdr,
5967 struct nfs41_free_stateid_res *res)
5968 {
5969 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5970 return res->status;
5971 }
5972 #endif /* CONFIG_NFS_V4_1 */
5973
5974 /*
5975 * END OF "GENERIC" DECODE ROUTINES.
5976 */
5977
5978 /*
5979 * Decode OPEN_DOWNGRADE response
5980 */
5981 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5982 struct xdr_stream *xdr,
5983 struct nfs_closeres *res)
5984 {
5985 struct compound_hdr hdr;
5986 int status;
5987
5988 status = decode_compound_hdr(xdr, &hdr);
5989 if (status)
5990 goto out;
5991 status = decode_sequence(xdr, &res->seq_res, rqstp);
5992 if (status)
5993 goto out;
5994 status = decode_putfh(xdr);
5995 if (status)
5996 goto out;
5997 status = decode_open_downgrade(xdr, res);
5998 if (status != 0)
5999 goto out;
6000 decode_getfattr(xdr, res->fattr, res->server);
6001 out:
6002 return status;
6003 }
6004
6005 /*
6006 * Decode ACCESS response
6007 */
6008 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6009 struct nfs4_accessres *res)
6010 {
6011 struct compound_hdr hdr;
6012 int status;
6013
6014 status = decode_compound_hdr(xdr, &hdr);
6015 if (status)
6016 goto out;
6017 status = decode_sequence(xdr, &res->seq_res, rqstp);
6018 if (status)
6019 goto out;
6020 status = decode_putfh(xdr);
6021 if (status != 0)
6022 goto out;
6023 status = decode_access(xdr, &res->supported, &res->access);
6024 if (status != 0)
6025 goto out;
6026 decode_getfattr(xdr, res->fattr, res->server);
6027 out:
6028 return status;
6029 }
6030
6031 /*
6032 * Decode LOOKUP response
6033 */
6034 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6035 struct nfs4_lookup_res *res)
6036 {
6037 struct compound_hdr hdr;
6038 int status;
6039
6040 status = decode_compound_hdr(xdr, &hdr);
6041 if (status)
6042 goto out;
6043 status = decode_sequence(xdr, &res->seq_res, rqstp);
6044 if (status)
6045 goto out;
6046 status = decode_putfh(xdr);
6047 if (status)
6048 goto out;
6049 status = decode_lookup(xdr);
6050 if (status)
6051 goto out;
6052 status = decode_getfh(xdr, res->fh);
6053 if (status)
6054 goto out;
6055 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6056 out:
6057 return status;
6058 }
6059
6060 /*
6061 * Decode LOOKUP_ROOT response
6062 */
6063 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6064 struct xdr_stream *xdr,
6065 struct nfs4_lookup_res *res)
6066 {
6067 struct compound_hdr hdr;
6068 int status;
6069
6070 status = decode_compound_hdr(xdr, &hdr);
6071 if (status)
6072 goto out;
6073 status = decode_sequence(xdr, &res->seq_res, rqstp);
6074 if (status)
6075 goto out;
6076 status = decode_putrootfh(xdr);
6077 if (status)
6078 goto out;
6079 status = decode_getfh(xdr, res->fh);
6080 if (status == 0)
6081 status = decode_getfattr_label(xdr, res->fattr,
6082 res->label, res->server);
6083 out:
6084 return status;
6085 }
6086
6087 /*
6088 * Decode REMOVE response
6089 */
6090 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6091 struct nfs_removeres *res)
6092 {
6093 struct compound_hdr hdr;
6094 int status;
6095
6096 status = decode_compound_hdr(xdr, &hdr);
6097 if (status)
6098 goto out;
6099 status = decode_sequence(xdr, &res->seq_res, rqstp);
6100 if (status)
6101 goto out;
6102 status = decode_putfh(xdr);
6103 if (status)
6104 goto out;
6105 status = decode_remove(xdr, &res->cinfo);
6106 out:
6107 return status;
6108 }
6109
6110 /*
6111 * Decode RENAME response
6112 */
6113 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6114 struct nfs_renameres *res)
6115 {
6116 struct compound_hdr hdr;
6117 int status;
6118
6119 status = decode_compound_hdr(xdr, &hdr);
6120 if (status)
6121 goto out;
6122 status = decode_sequence(xdr, &res->seq_res, rqstp);
6123 if (status)
6124 goto out;
6125 status = decode_putfh(xdr);
6126 if (status)
6127 goto out;
6128 status = decode_savefh(xdr);
6129 if (status)
6130 goto out;
6131 status = decode_putfh(xdr);
6132 if (status)
6133 goto out;
6134 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6135 out:
6136 return status;
6137 }
6138
6139 /*
6140 * Decode LINK response
6141 */
6142 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6143 struct nfs4_link_res *res)
6144 {
6145 struct compound_hdr hdr;
6146 int status;
6147
6148 status = decode_compound_hdr(xdr, &hdr);
6149 if (status)
6150 goto out;
6151 status = decode_sequence(xdr, &res->seq_res, rqstp);
6152 if (status)
6153 goto out;
6154 status = decode_putfh(xdr);
6155 if (status)
6156 goto out;
6157 status = decode_savefh(xdr);
6158 if (status)
6159 goto out;
6160 status = decode_putfh(xdr);
6161 if (status)
6162 goto out;
6163 status = decode_link(xdr, &res->cinfo);
6164 if (status)
6165 goto out;
6166 /*
6167 * Note order: OP_LINK leaves the directory as the current
6168 * filehandle.
6169 */
6170 status = decode_restorefh(xdr);
6171 if (status)
6172 goto out;
6173 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6174 out:
6175 return status;
6176 }
6177
6178 /*
6179 * Decode CREATE response
6180 */
6181 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6182 struct nfs4_create_res *res)
6183 {
6184 struct compound_hdr hdr;
6185 int status;
6186
6187 status = decode_compound_hdr(xdr, &hdr);
6188 if (status)
6189 goto out;
6190 status = decode_sequence(xdr, &res->seq_res, rqstp);
6191 if (status)
6192 goto out;
6193 status = decode_putfh(xdr);
6194 if (status)
6195 goto out;
6196 status = decode_create(xdr, &res->dir_cinfo);
6197 if (status)
6198 goto out;
6199 status = decode_getfh(xdr, res->fh);
6200 if (status)
6201 goto out;
6202 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6203 out:
6204 return status;
6205 }
6206
6207 /*
6208 * Decode SYMLINK response
6209 */
6210 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6211 struct nfs4_create_res *res)
6212 {
6213 return nfs4_xdr_dec_create(rqstp, xdr, res);
6214 }
6215
6216 /*
6217 * Decode GETATTR response
6218 */
6219 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6220 struct nfs4_getattr_res *res)
6221 {
6222 struct compound_hdr hdr;
6223 int status;
6224
6225 status = decode_compound_hdr(xdr, &hdr);
6226 if (status)
6227 goto out;
6228 status = decode_sequence(xdr, &res->seq_res, rqstp);
6229 if (status)
6230 goto out;
6231 status = decode_putfh(xdr);
6232 if (status)
6233 goto out;
6234 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6235 out:
6236 return status;
6237 }
6238
6239 /*
6240 * Encode an SETACL request
6241 */
6242 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6243 struct nfs_setaclargs *args)
6244 {
6245 struct compound_hdr hdr = {
6246 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6247 };
6248
6249 encode_compound_hdr(xdr, req, &hdr);
6250 encode_sequence(xdr, &args->seq_args, &hdr);
6251 encode_putfh(xdr, args->fh, &hdr);
6252 encode_setacl(xdr, args, &hdr);
6253 encode_nops(&hdr);
6254 }
6255
6256 /*
6257 * Decode SETACL response
6258 */
6259 static int
6260 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261 struct nfs_setaclres *res)
6262 {
6263 struct compound_hdr hdr;
6264 int status;
6265
6266 status = decode_compound_hdr(xdr, &hdr);
6267 if (status)
6268 goto out;
6269 status = decode_sequence(xdr, &res->seq_res, rqstp);
6270 if (status)
6271 goto out;
6272 status = decode_putfh(xdr);
6273 if (status)
6274 goto out;
6275 status = decode_setattr(xdr);
6276 out:
6277 return status;
6278 }
6279
6280 /*
6281 * Decode GETACL response
6282 */
6283 static int
6284 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285 struct nfs_getaclres *res)
6286 {
6287 struct compound_hdr hdr;
6288 int status;
6289
6290 if (res->acl_scratch != NULL) {
6291 void *p = page_address(res->acl_scratch);
6292 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6293 }
6294 status = decode_compound_hdr(xdr, &hdr);
6295 if (status)
6296 goto out;
6297 status = decode_sequence(xdr, &res->seq_res, rqstp);
6298 if (status)
6299 goto out;
6300 status = decode_putfh(xdr);
6301 if (status)
6302 goto out;
6303 status = decode_getacl(xdr, rqstp, res);
6304
6305 out:
6306 return status;
6307 }
6308
6309 /*
6310 * Decode CLOSE response
6311 */
6312 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6313 struct nfs_closeres *res)
6314 {
6315 struct compound_hdr hdr;
6316 int status;
6317
6318 status = decode_compound_hdr(xdr, &hdr);
6319 if (status)
6320 goto out;
6321 status = decode_sequence(xdr, &res->seq_res, rqstp);
6322 if (status)
6323 goto out;
6324 status = decode_putfh(xdr);
6325 if (status)
6326 goto out;
6327 status = decode_close(xdr, res);
6328 if (status != 0)
6329 goto out;
6330 /*
6331 * Note: Server may do delete on close for this file
6332 * in which case the getattr call will fail with
6333 * an ESTALE error. Shouldn't be a problem,
6334 * though, since fattr->valid will remain unset.
6335 */
6336 decode_getfattr(xdr, res->fattr, res->server);
6337 out:
6338 return status;
6339 }
6340
6341 /*
6342 * Decode OPEN response
6343 */
6344 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6345 struct nfs_openres *res)
6346 {
6347 struct compound_hdr hdr;
6348 int status;
6349
6350 status = decode_compound_hdr(xdr, &hdr);
6351 if (status)
6352 goto out;
6353 status = decode_sequence(xdr, &res->seq_res, rqstp);
6354 if (status)
6355 goto out;
6356 status = decode_putfh(xdr);
6357 if (status)
6358 goto out;
6359 status = decode_open(xdr, res);
6360 if (status)
6361 goto out;
6362 status = decode_getfh(xdr, &res->fh);
6363 if (status)
6364 goto out;
6365 if (res->access_request)
6366 decode_access(xdr, &res->access_supported, &res->access_result);
6367 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6368 out:
6369 return status;
6370 }
6371
6372 /*
6373 * Decode OPEN_CONFIRM response
6374 */
6375 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6376 struct xdr_stream *xdr,
6377 struct nfs_open_confirmres *res)
6378 {
6379 struct compound_hdr hdr;
6380 int status;
6381
6382 status = decode_compound_hdr(xdr, &hdr);
6383 if (status)
6384 goto out;
6385 status = decode_putfh(xdr);
6386 if (status)
6387 goto out;
6388 status = decode_open_confirm(xdr, res);
6389 out:
6390 return status;
6391 }
6392
6393 /*
6394 * Decode OPEN response
6395 */
6396 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6397 struct xdr_stream *xdr,
6398 struct nfs_openres *res)
6399 {
6400 struct compound_hdr hdr;
6401 int status;
6402
6403 status = decode_compound_hdr(xdr, &hdr);
6404 if (status)
6405 goto out;
6406 status = decode_sequence(xdr, &res->seq_res, rqstp);
6407 if (status)
6408 goto out;
6409 status = decode_putfh(xdr);
6410 if (status)
6411 goto out;
6412 status = decode_open(xdr, res);
6413 if (status)
6414 goto out;
6415 if (res->access_request)
6416 decode_access(xdr, &res->access_supported, &res->access_result);
6417 decode_getfattr(xdr, res->f_attr, res->server);
6418 out:
6419 return status;
6420 }
6421
6422 /*
6423 * Decode SETATTR response
6424 */
6425 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6426 struct xdr_stream *xdr,
6427 struct nfs_setattrres *res)
6428 {
6429 struct compound_hdr hdr;
6430 int status;
6431
6432 status = decode_compound_hdr(xdr, &hdr);
6433 if (status)
6434 goto out;
6435 status = decode_sequence(xdr, &res->seq_res, rqstp);
6436 if (status)
6437 goto out;
6438 status = decode_putfh(xdr);
6439 if (status)
6440 goto out;
6441 status = decode_setattr(xdr);
6442 if (status)
6443 goto out;
6444 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6445 out:
6446 return status;
6447 }
6448
6449 /*
6450 * Decode LOCK response
6451 */
6452 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6453 struct nfs_lock_res *res)
6454 {
6455 struct compound_hdr hdr;
6456 int status;
6457
6458 status = decode_compound_hdr(xdr, &hdr);
6459 if (status)
6460 goto out;
6461 status = decode_sequence(xdr, &res->seq_res, rqstp);
6462 if (status)
6463 goto out;
6464 status = decode_putfh(xdr);
6465 if (status)
6466 goto out;
6467 status = decode_lock(xdr, res);
6468 out:
6469 return status;
6470 }
6471
6472 /*
6473 * Decode LOCKT response
6474 */
6475 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6476 struct nfs_lockt_res *res)
6477 {
6478 struct compound_hdr hdr;
6479 int status;
6480
6481 status = decode_compound_hdr(xdr, &hdr);
6482 if (status)
6483 goto out;
6484 status = decode_sequence(xdr, &res->seq_res, rqstp);
6485 if (status)
6486 goto out;
6487 status = decode_putfh(xdr);
6488 if (status)
6489 goto out;
6490 status = decode_lockt(xdr, res);
6491 out:
6492 return status;
6493 }
6494
6495 /*
6496 * Decode LOCKU response
6497 */
6498 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6499 struct nfs_locku_res *res)
6500 {
6501 struct compound_hdr hdr;
6502 int status;
6503
6504 status = decode_compound_hdr(xdr, &hdr);
6505 if (status)
6506 goto out;
6507 status = decode_sequence(xdr, &res->seq_res, rqstp);
6508 if (status)
6509 goto out;
6510 status = decode_putfh(xdr);
6511 if (status)
6512 goto out;
6513 status = decode_locku(xdr, res);
6514 out:
6515 return status;
6516 }
6517
6518 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6519 struct xdr_stream *xdr, void *dummy)
6520 {
6521 struct compound_hdr hdr;
6522 int status;
6523
6524 status = decode_compound_hdr(xdr, &hdr);
6525 if (!status)
6526 status = decode_release_lockowner(xdr);
6527 return status;
6528 }
6529
6530 /*
6531 * Decode READLINK response
6532 */
6533 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6534 struct xdr_stream *xdr,
6535 struct nfs4_readlink_res *res)
6536 {
6537 struct compound_hdr hdr;
6538 int status;
6539
6540 status = decode_compound_hdr(xdr, &hdr);
6541 if (status)
6542 goto out;
6543 status = decode_sequence(xdr, &res->seq_res, rqstp);
6544 if (status)
6545 goto out;
6546 status = decode_putfh(xdr);
6547 if (status)
6548 goto out;
6549 status = decode_readlink(xdr, rqstp);
6550 out:
6551 return status;
6552 }
6553
6554 /*
6555 * Decode READDIR response
6556 */
6557 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6558 struct nfs4_readdir_res *res)
6559 {
6560 struct compound_hdr hdr;
6561 int status;
6562
6563 status = decode_compound_hdr(xdr, &hdr);
6564 if (status)
6565 goto out;
6566 status = decode_sequence(xdr, &res->seq_res, rqstp);
6567 if (status)
6568 goto out;
6569 status = decode_putfh(xdr);
6570 if (status)
6571 goto out;
6572 status = decode_readdir(xdr, rqstp, res);
6573 out:
6574 return status;
6575 }
6576
6577 /*
6578 * Decode Read response
6579 */
6580 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6581 struct nfs_readres *res)
6582 {
6583 struct compound_hdr hdr;
6584 int status;
6585
6586 status = decode_compound_hdr(xdr, &hdr);
6587 if (status)
6588 goto out;
6589 status = decode_sequence(xdr, &res->seq_res, rqstp);
6590 if (status)
6591 goto out;
6592 status = decode_putfh(xdr);
6593 if (status)
6594 goto out;
6595 status = decode_read(xdr, rqstp, res);
6596 if (!status)
6597 status = res->count;
6598 out:
6599 return status;
6600 }
6601
6602 /*
6603 * Decode WRITE response
6604 */
6605 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6606 struct nfs_writeres *res)
6607 {
6608 struct compound_hdr hdr;
6609 int status;
6610
6611 status = decode_compound_hdr(xdr, &hdr);
6612 if (status)
6613 goto out;
6614 status = decode_sequence(xdr, &res->seq_res, rqstp);
6615 if (status)
6616 goto out;
6617 status = decode_putfh(xdr);
6618 if (status)
6619 goto out;
6620 status = decode_write(xdr, res);
6621 if (status)
6622 goto out;
6623 if (res->fattr)
6624 decode_getfattr(xdr, res->fattr, res->server);
6625 if (!status)
6626 status = res->count;
6627 out:
6628 return status;
6629 }
6630
6631 /*
6632 * Decode COMMIT response
6633 */
6634 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6635 struct nfs_commitres *res)
6636 {
6637 struct compound_hdr hdr;
6638 int status;
6639
6640 status = decode_compound_hdr(xdr, &hdr);
6641 if (status)
6642 goto out;
6643 status = decode_sequence(xdr, &res->seq_res, rqstp);
6644 if (status)
6645 goto out;
6646 status = decode_putfh(xdr);
6647 if (status)
6648 goto out;
6649 status = decode_commit(xdr, res);
6650 out:
6651 return status;
6652 }
6653
6654 /*
6655 * Decode FSINFO response
6656 */
6657 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6658 struct nfs4_fsinfo_res *res)
6659 {
6660 struct compound_hdr hdr;
6661 int status;
6662
6663 status = decode_compound_hdr(xdr, &hdr);
6664 if (!status)
6665 status = decode_sequence(xdr, &res->seq_res, req);
6666 if (!status)
6667 status = decode_putfh(xdr);
6668 if (!status)
6669 status = decode_fsinfo(xdr, res->fsinfo);
6670 return status;
6671 }
6672
6673 /*
6674 * Decode PATHCONF response
6675 */
6676 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6677 struct nfs4_pathconf_res *res)
6678 {
6679 struct compound_hdr hdr;
6680 int status;
6681
6682 status = decode_compound_hdr(xdr, &hdr);
6683 if (!status)
6684 status = decode_sequence(xdr, &res->seq_res, req);
6685 if (!status)
6686 status = decode_putfh(xdr);
6687 if (!status)
6688 status = decode_pathconf(xdr, res->pathconf);
6689 return status;
6690 }
6691
6692 /*
6693 * Decode STATFS response
6694 */
6695 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6696 struct nfs4_statfs_res *res)
6697 {
6698 struct compound_hdr hdr;
6699 int status;
6700
6701 status = decode_compound_hdr(xdr, &hdr);
6702 if (!status)
6703 status = decode_sequence(xdr, &res->seq_res, req);
6704 if (!status)
6705 status = decode_putfh(xdr);
6706 if (!status)
6707 status = decode_statfs(xdr, res->fsstat);
6708 return status;
6709 }
6710
6711 /*
6712 * Decode GETATTR_BITMAP response
6713 */
6714 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6715 struct xdr_stream *xdr,
6716 struct nfs4_server_caps_res *res)
6717 {
6718 struct compound_hdr hdr;
6719 int status;
6720
6721 status = decode_compound_hdr(xdr, &hdr);
6722 if (status)
6723 goto out;
6724 status = decode_sequence(xdr, &res->seq_res, req);
6725 if (status)
6726 goto out;
6727 status = decode_putfh(xdr);
6728 if (status)
6729 goto out;
6730 status = decode_server_caps(xdr, res);
6731 out:
6732 return status;
6733 }
6734
6735 /*
6736 * Decode RENEW response
6737 */
6738 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6739 void *__unused)
6740 {
6741 struct compound_hdr hdr;
6742 int status;
6743
6744 status = decode_compound_hdr(xdr, &hdr);
6745 if (!status)
6746 status = decode_renew(xdr);
6747 return status;
6748 }
6749
6750 /*
6751 * Decode SETCLIENTID response
6752 */
6753 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6754 struct xdr_stream *xdr,
6755 struct nfs4_setclientid_res *res)
6756 {
6757 struct compound_hdr hdr;
6758 int status;
6759
6760 status = decode_compound_hdr(xdr, &hdr);
6761 if (!status)
6762 status = decode_setclientid(xdr, res);
6763 return status;
6764 }
6765
6766 /*
6767 * Decode SETCLIENTID_CONFIRM response
6768 */
6769 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6770 struct xdr_stream *xdr)
6771 {
6772 struct compound_hdr hdr;
6773 int status;
6774
6775 status = decode_compound_hdr(xdr, &hdr);
6776 if (!status)
6777 status = decode_setclientid_confirm(xdr);
6778 return status;
6779 }
6780
6781 /*
6782 * Decode DELEGRETURN response
6783 */
6784 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6785 struct xdr_stream *xdr,
6786 struct nfs4_delegreturnres *res)
6787 {
6788 struct compound_hdr hdr;
6789 int status;
6790
6791 status = decode_compound_hdr(xdr, &hdr);
6792 if (status)
6793 goto out;
6794 status = decode_sequence(xdr, &res->seq_res, rqstp);
6795 if (status)
6796 goto out;
6797 status = decode_putfh(xdr);
6798 if (status != 0)
6799 goto out;
6800 status = decode_getfattr(xdr, res->fattr, res->server);
6801 if (status != 0)
6802 goto out;
6803 status = decode_delegreturn(xdr);
6804 out:
6805 return status;
6806 }
6807
6808 /*
6809 * Decode FS_LOCATIONS response
6810 */
6811 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6812 struct xdr_stream *xdr,
6813 struct nfs4_fs_locations_res *res)
6814 {
6815 struct compound_hdr hdr;
6816 int status;
6817
6818 status = decode_compound_hdr(xdr, &hdr);
6819 if (status)
6820 goto out;
6821 status = decode_sequence(xdr, &res->seq_res, req);
6822 if (status)
6823 goto out;
6824 status = decode_putfh(xdr);
6825 if (status)
6826 goto out;
6827 status = decode_lookup(xdr);
6828 if (status)
6829 goto out;
6830 xdr_enter_page(xdr, PAGE_SIZE);
6831 status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6832 NULL, res->fs_locations,
6833 NULL, res->fs_locations->server);
6834 out:
6835 return status;
6836 }
6837
6838 /*
6839 * Decode SECINFO response
6840 */
6841 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6842 struct xdr_stream *xdr,
6843 struct nfs4_secinfo_res *res)
6844 {
6845 struct compound_hdr hdr;
6846 int status;
6847
6848 status = decode_compound_hdr(xdr, &hdr);
6849 if (status)
6850 goto out;
6851 status = decode_sequence(xdr, &res->seq_res, rqstp);
6852 if (status)
6853 goto out;
6854 status = decode_putfh(xdr);
6855 if (status)
6856 goto out;
6857 status = decode_secinfo(xdr, res);
6858 out:
6859 return status;
6860 }
6861
6862 #if defined(CONFIG_NFS_V4_1)
6863 /*
6864 * Decode BIND_CONN_TO_SESSION response
6865 */
6866 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6867 struct xdr_stream *xdr,
6868 void *res)
6869 {
6870 struct compound_hdr hdr;
6871 int status;
6872
6873 status = decode_compound_hdr(xdr, &hdr);
6874 if (!status)
6875 status = decode_bind_conn_to_session(xdr, res);
6876 return status;
6877 }
6878
6879 /*
6880 * Decode EXCHANGE_ID response
6881 */
6882 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6883 struct xdr_stream *xdr,
6884 void *res)
6885 {
6886 struct compound_hdr hdr;
6887 int status;
6888
6889 status = decode_compound_hdr(xdr, &hdr);
6890 if (!status)
6891 status = decode_exchange_id(xdr, res);
6892 return status;
6893 }
6894
6895 /*
6896 * Decode CREATE_SESSION response
6897 */
6898 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6899 struct xdr_stream *xdr,
6900 struct nfs41_create_session_res *res)
6901 {
6902 struct compound_hdr hdr;
6903 int status;
6904
6905 status = decode_compound_hdr(xdr, &hdr);
6906 if (!status)
6907 status = decode_create_session(xdr, res);
6908 return status;
6909 }
6910
6911 /*
6912 * Decode DESTROY_SESSION response
6913 */
6914 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6915 struct xdr_stream *xdr,
6916 void *res)
6917 {
6918 struct compound_hdr hdr;
6919 int status;
6920
6921 status = decode_compound_hdr(xdr, &hdr);
6922 if (!status)
6923 status = decode_destroy_session(xdr, res);
6924 return status;
6925 }
6926
6927 /*
6928 * Decode DESTROY_CLIENTID response
6929 */
6930 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6931 struct xdr_stream *xdr,
6932 void *res)
6933 {
6934 struct compound_hdr hdr;
6935 int status;
6936
6937 status = decode_compound_hdr(xdr, &hdr);
6938 if (!status)
6939 status = decode_destroy_clientid(xdr, res);
6940 return status;
6941 }
6942
6943 /*
6944 * Decode SEQUENCE response
6945 */
6946 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6947 struct xdr_stream *xdr,
6948 struct nfs4_sequence_res *res)
6949 {
6950 struct compound_hdr hdr;
6951 int status;
6952
6953 status = decode_compound_hdr(xdr, &hdr);
6954 if (!status)
6955 status = decode_sequence(xdr, res, rqstp);
6956 return status;
6957 }
6958
6959 /*
6960 * Decode GET_LEASE_TIME response
6961 */
6962 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6963 struct xdr_stream *xdr,
6964 struct nfs4_get_lease_time_res *res)
6965 {
6966 struct compound_hdr hdr;
6967 int status;
6968
6969 status = decode_compound_hdr(xdr, &hdr);
6970 if (!status)
6971 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6972 if (!status)
6973 status = decode_putrootfh(xdr);
6974 if (!status)
6975 status = decode_fsinfo(xdr, res->lr_fsinfo);
6976 return status;
6977 }
6978
6979 /*
6980 * Decode RECLAIM_COMPLETE response
6981 */
6982 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6983 struct xdr_stream *xdr,
6984 struct nfs41_reclaim_complete_res *res)
6985 {
6986 struct compound_hdr hdr;
6987 int status;
6988
6989 status = decode_compound_hdr(xdr, &hdr);
6990 if (!status)
6991 status = decode_sequence(xdr, &res->seq_res, rqstp);
6992 if (!status)
6993 status = decode_reclaim_complete(xdr, (void *)NULL);
6994 return status;
6995 }
6996
6997 /*
6998 * Decode GETDEVICELIST response
6999 */
7000 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7001 struct xdr_stream *xdr,
7002 struct nfs4_getdevicelist_res *res)
7003 {
7004 struct compound_hdr hdr;
7005 int status;
7006
7007 dprintk("encoding getdevicelist!\n");
7008
7009 status = decode_compound_hdr(xdr, &hdr);
7010 if (status != 0)
7011 goto out;
7012 status = decode_sequence(xdr, &res->seq_res, rqstp);
7013 if (status != 0)
7014 goto out;
7015 status = decode_putfh(xdr);
7016 if (status != 0)
7017 goto out;
7018 status = decode_getdevicelist(xdr, res->devlist);
7019 out:
7020 return status;
7021 }
7022
7023 /*
7024 * Decode GETDEVINFO response
7025 */
7026 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7027 struct xdr_stream *xdr,
7028 struct nfs4_getdeviceinfo_res *res)
7029 {
7030 struct compound_hdr hdr;
7031 int status;
7032
7033 status = decode_compound_hdr(xdr, &hdr);
7034 if (status != 0)
7035 goto out;
7036 status = decode_sequence(xdr, &res->seq_res, rqstp);
7037 if (status != 0)
7038 goto out;
7039 status = decode_getdeviceinfo(xdr, res->pdev);
7040 out:
7041 return status;
7042 }
7043
7044 /*
7045 * Decode LAYOUTGET response
7046 */
7047 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7048 struct xdr_stream *xdr,
7049 struct nfs4_layoutget_res *res)
7050 {
7051 struct compound_hdr hdr;
7052 int status;
7053
7054 status = decode_compound_hdr(xdr, &hdr);
7055 if (status)
7056 goto out;
7057 status = decode_sequence(xdr, &res->seq_res, rqstp);
7058 if (status)
7059 goto out;
7060 status = decode_putfh(xdr);
7061 if (status)
7062 goto out;
7063 status = decode_layoutget(xdr, rqstp, res);
7064 out:
7065 return status;
7066 }
7067
7068 /*
7069 * Decode LAYOUTRETURN response
7070 */
7071 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7072 struct xdr_stream *xdr,
7073 struct nfs4_layoutreturn_res *res)
7074 {
7075 struct compound_hdr hdr;
7076 int status;
7077
7078 status = decode_compound_hdr(xdr, &hdr);
7079 if (status)
7080 goto out;
7081 status = decode_sequence(xdr, &res->seq_res, rqstp);
7082 if (status)
7083 goto out;
7084 status = decode_putfh(xdr);
7085 if (status)
7086 goto out;
7087 status = decode_layoutreturn(xdr, res);
7088 out:
7089 return status;
7090 }
7091
7092 /*
7093 * Decode LAYOUTCOMMIT response
7094 */
7095 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7096 struct xdr_stream *xdr,
7097 struct nfs4_layoutcommit_res *res)
7098 {
7099 struct compound_hdr hdr;
7100 int status;
7101
7102 status = decode_compound_hdr(xdr, &hdr);
7103 if (status)
7104 goto out;
7105 status = decode_sequence(xdr, &res->seq_res, rqstp);
7106 if (status)
7107 goto out;
7108 status = decode_putfh(xdr);
7109 if (status)
7110 goto out;
7111 status = decode_layoutcommit(xdr, rqstp, res);
7112 if (status)
7113 goto out;
7114 decode_getfattr(xdr, res->fattr, res->server);
7115 out:
7116 return status;
7117 }
7118
7119 /*
7120 * Decode SECINFO_NO_NAME response
7121 */
7122 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7123 struct xdr_stream *xdr,
7124 struct nfs4_secinfo_res *res)
7125 {
7126 struct compound_hdr hdr;
7127 int status;
7128
7129 status = decode_compound_hdr(xdr, &hdr);
7130 if (status)
7131 goto out;
7132 status = decode_sequence(xdr, &res->seq_res, rqstp);
7133 if (status)
7134 goto out;
7135 status = decode_putrootfh(xdr);
7136 if (status)
7137 goto out;
7138 status = decode_secinfo_no_name(xdr, res);
7139 out:
7140 return status;
7141 }
7142
7143 /*
7144 * Decode TEST_STATEID response
7145 */
7146 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7147 struct xdr_stream *xdr,
7148 struct nfs41_test_stateid_res *res)
7149 {
7150 struct compound_hdr hdr;
7151 int status;
7152
7153 status = decode_compound_hdr(xdr, &hdr);
7154 if (status)
7155 goto out;
7156 status = decode_sequence(xdr, &res->seq_res, rqstp);
7157 if (status)
7158 goto out;
7159 status = decode_test_stateid(xdr, res);
7160 out:
7161 return status;
7162 }
7163
7164 /*
7165 * Decode FREE_STATEID response
7166 */
7167 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7168 struct xdr_stream *xdr,
7169 struct nfs41_free_stateid_res *res)
7170 {
7171 struct compound_hdr hdr;
7172 int status;
7173
7174 status = decode_compound_hdr(xdr, &hdr);
7175 if (status)
7176 goto out;
7177 status = decode_sequence(xdr, &res->seq_res, rqstp);
7178 if (status)
7179 goto out;
7180 status = decode_free_stateid(xdr, res);
7181 out:
7182 return status;
7183 }
7184 #endif /* CONFIG_NFS_V4_1 */
7185
7186 /**
7187 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7188 * the local page cache.
7189 * @xdr: XDR stream where entry resides
7190 * @entry: buffer to fill in with entry data
7191 * @plus: boolean indicating whether this should be a readdirplus entry
7192 *
7193 * Returns zero if successful, otherwise a negative errno value is
7194 * returned.
7195 *
7196 * This function is not invoked during READDIR reply decoding, but
7197 * rather whenever an application invokes the getdents(2) system call
7198 * on a directory already in our cache.
7199 */
7200 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7201 int plus)
7202 {
7203 unsigned int savep;
7204 uint32_t bitmap[3] = {0};
7205 uint32_t len;
7206 __be32 *p = xdr_inline_decode(xdr, 4);
7207 if (unlikely(!p))
7208 goto out_overflow;
7209 if (*p == xdr_zero) {
7210 p = xdr_inline_decode(xdr, 4);
7211 if (unlikely(!p))
7212 goto out_overflow;
7213 if (*p == xdr_zero)
7214 return -EAGAIN;
7215 entry->eof = 1;
7216 return -EBADCOOKIE;
7217 }
7218
7219 p = xdr_inline_decode(xdr, 12);
7220 if (unlikely(!p))
7221 goto out_overflow;
7222 entry->prev_cookie = entry->cookie;
7223 p = xdr_decode_hyper(p, &entry->cookie);
7224 entry->len = be32_to_cpup(p);
7225
7226 p = xdr_inline_decode(xdr, entry->len);
7227 if (unlikely(!p))
7228 goto out_overflow;
7229 entry->name = (const char *) p;
7230
7231 /*
7232 * In case the server doesn't return an inode number,
7233 * we fake one here. (We don't use inode number 0,
7234 * since glibc seems to choke on it...)
7235 */
7236 entry->ino = 1;
7237 entry->fattr->valid = 0;
7238
7239 if (decode_attr_bitmap(xdr, bitmap) < 0)
7240 goto out_overflow;
7241
7242 if (decode_attr_length(xdr, &len, &savep) < 0)
7243 goto out_overflow;
7244
7245 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7246 NULL, entry->label, entry->server) < 0)
7247 goto out_overflow;
7248 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7249 entry->ino = entry->fattr->mounted_on_fileid;
7250 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7251 entry->ino = entry->fattr->fileid;
7252
7253 entry->d_type = DT_UNKNOWN;
7254 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7255 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7256
7257 return 0;
7258
7259 out_overflow:
7260 print_overflow_msg(__func__, xdr);
7261 return -EAGAIN;
7262 }
7263
7264 /*
7265 * We need to translate between nfs status return values and
7266 * the local errno values which may not be the same.
7267 */
7268 static struct {
7269 int stat;
7270 int errno;
7271 } nfs_errtbl[] = {
7272 { NFS4_OK, 0 },
7273 { NFS4ERR_PERM, -EPERM },
7274 { NFS4ERR_NOENT, -ENOENT },
7275 { NFS4ERR_IO, -errno_NFSERR_IO},
7276 { NFS4ERR_NXIO, -ENXIO },
7277 { NFS4ERR_ACCESS, -EACCES },
7278 { NFS4ERR_EXIST, -EEXIST },
7279 { NFS4ERR_XDEV, -EXDEV },
7280 { NFS4ERR_NOTDIR, -ENOTDIR },
7281 { NFS4ERR_ISDIR, -EISDIR },
7282 { NFS4ERR_INVAL, -EINVAL },
7283 { NFS4ERR_FBIG, -EFBIG },
7284 { NFS4ERR_NOSPC, -ENOSPC },
7285 { NFS4ERR_ROFS, -EROFS },
7286 { NFS4ERR_MLINK, -EMLINK },
7287 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7288 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7289 { NFS4ERR_DQUOT, -EDQUOT },
7290 { NFS4ERR_STALE, -ESTALE },
7291 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7292 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7293 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7294 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7295 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7296 { NFS4ERR_BADTYPE, -EBADTYPE },
7297 { NFS4ERR_LOCKED, -EAGAIN },
7298 { NFS4ERR_SYMLINK, -ELOOP },
7299 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7300 { NFS4ERR_DEADLOCK, -EDEADLK },
7301 { -1, -EIO }
7302 };
7303
7304 /*
7305 * Convert an NFS error code to a local one.
7306 * This one is used jointly by NFSv2 and NFSv3.
7307 */
7308 static int
7309 nfs4_stat_to_errno(int stat)
7310 {
7311 int i;
7312 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7313 if (nfs_errtbl[i].stat == stat)
7314 return nfs_errtbl[i].errno;
7315 }
7316 if (stat <= 10000 || stat > 10100) {
7317 /* The server is looney tunes. */
7318 return -EREMOTEIO;
7319 }
7320 /* If we cannot translate the error, the recovery routines should
7321 * handle it.
7322 * Note: remaining NFSv4 error codes have values > 10000, so should
7323 * not conflict with native Linux error codes.
7324 */
7325 return -stat;
7326 }
7327
7328 #define PROC(proc, argtype, restype) \
7329 [NFSPROC4_CLNT_##proc] = { \
7330 .p_proc = NFSPROC4_COMPOUND, \
7331 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7332 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7333 .p_arglen = NFS4_##argtype##_sz, \
7334 .p_replen = NFS4_##restype##_sz, \
7335 .p_statidx = NFSPROC4_CLNT_##proc, \
7336 .p_name = #proc, \
7337 }
7338
7339 struct rpc_procinfo nfs4_procedures[] = {
7340 PROC(READ, enc_read, dec_read),
7341 PROC(WRITE, enc_write, dec_write),
7342 PROC(COMMIT, enc_commit, dec_commit),
7343 PROC(OPEN, enc_open, dec_open),
7344 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7345 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7346 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7347 PROC(CLOSE, enc_close, dec_close),
7348 PROC(SETATTR, enc_setattr, dec_setattr),
7349 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7350 PROC(RENEW, enc_renew, dec_renew),
7351 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7352 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7353 PROC(LOCK, enc_lock, dec_lock),
7354 PROC(LOCKT, enc_lockt, dec_lockt),
7355 PROC(LOCKU, enc_locku, dec_locku),
7356 PROC(ACCESS, enc_access, dec_access),
7357 PROC(GETATTR, enc_getattr, dec_getattr),
7358 PROC(LOOKUP, enc_lookup, dec_lookup),
7359 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7360 PROC(REMOVE, enc_remove, dec_remove),
7361 PROC(RENAME, enc_rename, dec_rename),
7362 PROC(LINK, enc_link, dec_link),
7363 PROC(SYMLINK, enc_symlink, dec_symlink),
7364 PROC(CREATE, enc_create, dec_create),
7365 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7366 PROC(STATFS, enc_statfs, dec_statfs),
7367 PROC(READLINK, enc_readlink, dec_readlink),
7368 PROC(READDIR, enc_readdir, dec_readdir),
7369 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7370 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7371 PROC(GETACL, enc_getacl, dec_getacl),
7372 PROC(SETACL, enc_setacl, dec_setacl),
7373 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7374 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7375 PROC(SECINFO, enc_secinfo, dec_secinfo),
7376 #if defined(CONFIG_NFS_V4_1)
7377 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7378 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7379 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7380 PROC(SEQUENCE, enc_sequence, dec_sequence),
7381 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7382 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7383 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7384 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7385 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7386 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7387 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7388 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7389 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7390 PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
7391 PROC(BIND_CONN_TO_SESSION,
7392 enc_bind_conn_to_session, dec_bind_conn_to_session),
7393 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7394 #endif /* CONFIG_NFS_V4_1 */
7395 };
7396
7397 const struct rpc_version nfs_version4 = {
7398 .number = 4,
7399 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7400 .procs = nfs4_procedures
7401 };
7402
7403 /*
7404 * Local variables:
7405 * c-basic-offset: 8
7406 * End:
7407 */
Linux kernel - Deliverables
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