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NFS: Move nfs_idmap.h into fs/nfs/
[mirror_ubuntu-jammy-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55
56 #include "nfs4_fs.h"
57 #include "internal.h"
58 #include "nfs4idmap.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 /* clientid */ + \
150 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
151 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
152 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
153 #define encode_setclientid_confirm_maxsz \
154 (op_encode_hdr_maxsz + \
155 3 + (NFS4_VERIFIER_SIZE >> 2))
156 #define decode_setclientid_confirm_maxsz \
157 (op_decode_hdr_maxsz)
158 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
159 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
160 #define encode_share_access_maxsz \
161 (2)
162 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
163 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
164 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
165 #define encode_open_maxsz (op_encode_hdr_maxsz + \
166 2 + encode_share_access_maxsz + 2 + \
167 open_owner_id_maxsz + \
168 encode_opentype_maxsz + \
169 encode_claim_null_maxsz)
170 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
171 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
172 decode_ace_maxsz)
173 #define decode_change_info_maxsz (5)
174 #define decode_open_maxsz (op_decode_hdr_maxsz + \
175 decode_stateid_maxsz + \
176 decode_change_info_maxsz + 1 + \
177 nfs4_fattr_bitmap_maxsz + \
178 decode_delegation_maxsz)
179 #define encode_open_confirm_maxsz \
180 (op_encode_hdr_maxsz + \
181 encode_stateid_maxsz + 1)
182 #define decode_open_confirm_maxsz \
183 (op_decode_hdr_maxsz + \
184 decode_stateid_maxsz)
185 #define encode_open_downgrade_maxsz \
186 (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 1 + \
188 encode_share_access_maxsz)
189 #define decode_open_downgrade_maxsz \
190 (op_decode_hdr_maxsz + \
191 decode_stateid_maxsz)
192 #define encode_close_maxsz (op_encode_hdr_maxsz + \
193 1 + encode_stateid_maxsz)
194 #define decode_close_maxsz (op_decode_hdr_maxsz + \
195 decode_stateid_maxsz)
196 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
197 encode_stateid_maxsz + \
198 encode_attrs_maxsz)
199 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
200 nfs4_fattr_bitmap_maxsz)
201 #define encode_read_maxsz (op_encode_hdr_maxsz + \
202 encode_stateid_maxsz + 3)
203 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
204 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
205 2 + encode_verifier_maxsz + 5 + \
206 nfs4_label_maxsz)
207 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
208 decode_verifier_maxsz)
209 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
210 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
211 #define encode_write_maxsz (op_encode_hdr_maxsz + \
212 encode_stateid_maxsz + 4)
213 #define decode_write_maxsz (op_decode_hdr_maxsz + \
214 2 + decode_verifier_maxsz)
215 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
216 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
217 decode_verifier_maxsz)
218 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
219 nfs4_name_maxsz)
220 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
221 decode_change_info_maxsz)
222 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
223 2 * nfs4_name_maxsz)
224 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
225 decode_change_info_maxsz + \
226 decode_change_info_maxsz)
227 #define encode_link_maxsz (op_encode_hdr_maxsz + \
228 nfs4_name_maxsz)
229 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
230 #define encode_lockowner_maxsz (7)
231 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
232 7 + \
233 1 + encode_stateid_maxsz + 1 + \
234 encode_lockowner_maxsz)
235 #define decode_lock_denied_maxsz \
236 (8 + decode_lockowner_maxsz)
237 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
238 decode_lock_denied_maxsz)
239 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
240 encode_lockowner_maxsz)
241 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
242 decode_lock_denied_maxsz)
243 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
244 encode_stateid_maxsz + \
245 4)
246 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
247 decode_stateid_maxsz)
248 #define encode_release_lockowner_maxsz \
249 (op_encode_hdr_maxsz + \
250 encode_lockowner_maxsz)
251 #define decode_release_lockowner_maxsz \
252 (op_decode_hdr_maxsz)
253 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
254 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
255 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
256 1 + nfs4_name_maxsz + \
257 1 + \
258 nfs4_fattr_maxsz)
259 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
260 #define encode_create_maxsz (op_encode_hdr_maxsz + \
261 1 + 2 + nfs4_name_maxsz + \
262 encode_attrs_maxsz)
263 #define decode_create_maxsz (op_decode_hdr_maxsz + \
264 decode_change_info_maxsz + \
265 nfs4_fattr_bitmap_maxsz)
266 #define encode_statfs_maxsz (encode_getattr_maxsz)
267 #define decode_statfs_maxsz (decode_getattr_maxsz)
268 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
269 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
270 #define encode_getacl_maxsz (encode_getattr_maxsz)
271 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
272 nfs4_fattr_bitmap_maxsz + 1)
273 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
274 encode_stateid_maxsz + 3)
275 #define decode_setacl_maxsz (decode_setattr_maxsz)
276 #define encode_fs_locations_maxsz \
277 (encode_getattr_maxsz)
278 #define decode_fs_locations_maxsz \
279 (0)
280 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
281 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
282
283 #if defined(CONFIG_NFS_V4_1)
284 #define NFS4_MAX_MACHINE_NAME_LEN (64)
285 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
286 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
287
288 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
289 encode_verifier_maxsz + \
290 1 /* co_ownerid.len */ + \
291 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
292 1 /* flags */ + \
293 1 /* spa_how */ + \
294 /* max is SP4_MACH_CRED (for now) */ + \
295 1 + NFS4_OP_MAP_NUM_WORDS + \
296 1 + NFS4_OP_MAP_NUM_WORDS + \
297 1 /* implementation id array of size 1 */ + \
298 1 /* nii_domain */ + \
299 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
300 1 /* nii_name */ + \
301 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
302 3 /* nii_date */)
303 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
304 2 /* eir_clientid */ + \
305 1 /* eir_sequenceid */ + \
306 1 /* eir_flags */ + \
307 1 /* spr_how */ + \
308 /* max is SP4_MACH_CRED (for now) */ + \
309 1 + NFS4_OP_MAP_NUM_WORDS + \
310 1 + NFS4_OP_MAP_NUM_WORDS + \
311 2 /* eir_server_owner.so_minor_id */ + \
312 /* eir_server_owner.so_major_id<> */ \
313 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
314 /* eir_server_scope<> */ \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
316 1 /* eir_server_impl_id array length */ + \
317 1 /* nii_domain */ + \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
319 1 /* nii_name */ + \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
321 3 /* nii_date */)
322 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
323 #define decode_channel_attrs_maxsz (6 + \
324 1 /* ca_rdma_ird.len */ + \
325 1 /* ca_rdma_ird */)
326 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
327 2 /* csa_clientid */ + \
328 1 /* csa_sequence */ + \
329 1 /* csa_flags */ + \
330 encode_channel_attrs_maxsz + \
331 encode_channel_attrs_maxsz + \
332 1 /* csa_cb_program */ + \
333 1 /* csa_sec_parms.len (1) */ + \
334 1 /* cb_secflavor (AUTH_SYS) */ + \
335 1 /* stamp */ + \
336 1 /* machinename.len */ + \
337 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
338 1 /* uid */ + \
339 1 /* gid */ + \
340 1 /* gids.len (0) */)
341 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
342 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
343 1 /* csr_sequence */ + \
344 1 /* csr_flags */ + \
345 decode_channel_attrs_maxsz + \
346 decode_channel_attrs_maxsz)
347 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
348 /* bctsa_sessid */ \
349 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350 1 /* bctsa_dir */ + \
351 1 /* bctsa_use_conn_in_rdma_mode */)
352 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
353 /* bctsr_sessid */ \
354 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
355 1 /* bctsr_dir */ + \
356 1 /* bctsr_use_conn_in_rdma_mode */)
357 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
358 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
359 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
360 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
361 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
362 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
363 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
364 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
365 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
366 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
367 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
368 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
369 1 /* layout type */ + \
370 1 /* maxcount */ + \
371 1 /* bitmap size */ + \
372 1 /* notification bitmap length */ + \
373 1 /* notification bitmap, word 0 */)
374 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
375 1 /* layout type */ + \
376 1 /* opaque devaddr4 length */ + \
377 /* devaddr4 payload is read into page */ \
378 1 /* notification bitmap length */ + \
379 1 /* notification bitmap, word 0 */)
380 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
381 encode_stateid_maxsz)
382 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
383 decode_stateid_maxsz + \
384 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
385 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
386 2 /* offset */ + \
387 2 /* length */ + \
388 1 /* reclaim */ + \
389 encode_stateid_maxsz + \
390 1 /* new offset (true) */ + \
391 2 /* last byte written */ + \
392 1 /* nt_timechanged (false) */ + \
393 1 /* layoutupdate4 layout type */ + \
394 1 /* layoutupdate4 opaqueue len */)
395 /* the actual content of layoutupdate4 should
396 be allocated by drivers and spliced in
397 using xdr_write_pages */
398 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
399 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
400 encode_stateid_maxsz + \
401 1 /* FIXME: opaque lrf_body always empty at the moment */)
402 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
403 1 + decode_stateid_maxsz)
404 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
405 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
406 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
407 XDR_QUADLEN(NFS4_STATEID_SIZE))
408 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
409 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
410 XDR_QUADLEN(NFS4_STATEID_SIZE))
411 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
412 #else /* CONFIG_NFS_V4_1 */
413 #define encode_sequence_maxsz 0
414 #define decode_sequence_maxsz 0
415 #endif /* CONFIG_NFS_V4_1 */
416
417 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
418 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
419 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
420 encode_sequence_maxsz + \
421 encode_putfh_maxsz + \
422 encode_read_maxsz)
423 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
424 decode_sequence_maxsz + \
425 decode_putfh_maxsz + \
426 decode_read_maxsz)
427 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
428 encode_sequence_maxsz + \
429 encode_putfh_maxsz + \
430 encode_readlink_maxsz)
431 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_readlink_maxsz)
435 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
436 encode_sequence_maxsz + \
437 encode_putfh_maxsz + \
438 encode_readdir_maxsz)
439 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
440 decode_sequence_maxsz + \
441 decode_putfh_maxsz + \
442 decode_readdir_maxsz)
443 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
444 encode_sequence_maxsz + \
445 encode_putfh_maxsz + \
446 encode_write_maxsz + \
447 encode_getattr_maxsz)
448 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
449 decode_sequence_maxsz + \
450 decode_putfh_maxsz + \
451 decode_write_maxsz + \
452 decode_getattr_maxsz)
453 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
454 encode_sequence_maxsz + \
455 encode_putfh_maxsz + \
456 encode_commit_maxsz)
457 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
458 decode_sequence_maxsz + \
459 decode_putfh_maxsz + \
460 decode_commit_maxsz)
461 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_open_maxsz + \
465 encode_access_maxsz + \
466 encode_getfh_maxsz + \
467 encode_getattr_maxsz)
468 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
469 decode_sequence_maxsz + \
470 decode_putfh_maxsz + \
471 decode_open_maxsz + \
472 decode_access_maxsz + \
473 decode_getfh_maxsz + \
474 decode_getattr_maxsz)
475 #define NFS4_enc_open_confirm_sz \
476 (compound_encode_hdr_maxsz + \
477 encode_putfh_maxsz + \
478 encode_open_confirm_maxsz)
479 #define NFS4_dec_open_confirm_sz \
480 (compound_decode_hdr_maxsz + \
481 decode_putfh_maxsz + \
482 decode_open_confirm_maxsz)
483 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
484 encode_sequence_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_maxsz + \
487 encode_access_maxsz + \
488 encode_getattr_maxsz)
489 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
490 decode_sequence_maxsz + \
491 decode_putfh_maxsz + \
492 decode_open_maxsz + \
493 decode_access_maxsz + \
494 decode_getattr_maxsz)
495 #define NFS4_enc_open_downgrade_sz \
496 (compound_encode_hdr_maxsz + \
497 encode_sequence_maxsz + \
498 encode_putfh_maxsz + \
499 encode_open_downgrade_maxsz + \
500 encode_getattr_maxsz)
501 #define NFS4_dec_open_downgrade_sz \
502 (compound_decode_hdr_maxsz + \
503 decode_sequence_maxsz + \
504 decode_putfh_maxsz + \
505 decode_open_downgrade_maxsz + \
506 decode_getattr_maxsz)
507 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putfh_maxsz + \
510 encode_close_maxsz + \
511 encode_getattr_maxsz)
512 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_close_maxsz + \
516 decode_getattr_maxsz)
517 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_setattr_maxsz + \
521 encode_getattr_maxsz)
522 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
523 decode_sequence_maxsz + \
524 decode_putfh_maxsz + \
525 decode_setattr_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_fsinfo_maxsz)
531 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_fsinfo_maxsz)
535 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
536 encode_renew_maxsz)
537 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
538 decode_renew_maxsz)
539 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
540 encode_setclientid_maxsz)
541 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
542 decode_setclientid_maxsz)
543 #define NFS4_enc_setclientid_confirm_sz \
544 (compound_encode_hdr_maxsz + \
545 encode_setclientid_confirm_maxsz)
546 #define NFS4_dec_setclientid_confirm_sz \
547 (compound_decode_hdr_maxsz + \
548 decode_setclientid_confirm_maxsz)
549 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
550 encode_sequence_maxsz + \
551 encode_putfh_maxsz + \
552 encode_lock_maxsz)
553 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
554 decode_sequence_maxsz + \
555 decode_putfh_maxsz + \
556 decode_lock_maxsz)
557 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_lockt_maxsz)
561 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_lockt_maxsz)
565 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_locku_maxsz)
569 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_locku_maxsz)
573 #define NFS4_enc_release_lockowner_sz \
574 (compound_encode_hdr_maxsz + \
575 encode_lockowner_maxsz)
576 #define NFS4_dec_release_lockowner_sz \
577 (compound_decode_hdr_maxsz + \
578 decode_lockowner_maxsz)
579 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
580 encode_sequence_maxsz + \
581 encode_putfh_maxsz + \
582 encode_access_maxsz + \
583 encode_getattr_maxsz)
584 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
585 decode_sequence_maxsz + \
586 decode_putfh_maxsz + \
587 decode_access_maxsz + \
588 decode_getattr_maxsz)
589 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
590 encode_sequence_maxsz + \
591 encode_putfh_maxsz + \
592 encode_getattr_maxsz + \
593 encode_renew_maxsz)
594 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_getattr_maxsz + \
598 decode_renew_maxsz)
599 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
600 encode_sequence_maxsz + \
601 encode_putfh_maxsz + \
602 encode_lookup_maxsz + \
603 encode_getattr_maxsz + \
604 encode_getfh_maxsz)
605 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
606 decode_sequence_maxsz + \
607 decode_putfh_maxsz + \
608 decode_lookup_maxsz + \
609 decode_getattr_maxsz + \
610 decode_getfh_maxsz)
611 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
612 encode_sequence_maxsz + \
613 encode_putrootfh_maxsz + \
614 encode_getattr_maxsz + \
615 encode_getfh_maxsz)
616 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
617 decode_sequence_maxsz + \
618 decode_putrootfh_maxsz + \
619 decode_getattr_maxsz + \
620 decode_getfh_maxsz)
621 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
622 encode_sequence_maxsz + \
623 encode_putfh_maxsz + \
624 encode_remove_maxsz)
625 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
626 decode_sequence_maxsz + \
627 decode_putfh_maxsz + \
628 decode_remove_maxsz)
629 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_savefh_maxsz + \
633 encode_putfh_maxsz + \
634 encode_rename_maxsz)
635 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
636 decode_sequence_maxsz + \
637 decode_putfh_maxsz + \
638 decode_savefh_maxsz + \
639 decode_putfh_maxsz + \
640 decode_rename_maxsz)
641 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
642 encode_sequence_maxsz + \
643 encode_putfh_maxsz + \
644 encode_savefh_maxsz + \
645 encode_putfh_maxsz + \
646 encode_link_maxsz + \
647 encode_restorefh_maxsz + \
648 encode_getattr_maxsz)
649 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
650 decode_sequence_maxsz + \
651 decode_putfh_maxsz + \
652 decode_savefh_maxsz + \
653 decode_putfh_maxsz + \
654 decode_link_maxsz + \
655 decode_restorefh_maxsz + \
656 decode_getattr_maxsz)
657 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
658 encode_sequence_maxsz + \
659 encode_putfh_maxsz + \
660 encode_symlink_maxsz + \
661 encode_getattr_maxsz + \
662 encode_getfh_maxsz)
663 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
664 decode_sequence_maxsz + \
665 decode_putfh_maxsz + \
666 decode_symlink_maxsz + \
667 decode_getattr_maxsz + \
668 decode_getfh_maxsz)
669 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
670 encode_sequence_maxsz + \
671 encode_putfh_maxsz + \
672 encode_create_maxsz + \
673 encode_getfh_maxsz + \
674 encode_getattr_maxsz)
675 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_create_maxsz + \
679 decode_getfh_maxsz + \
680 decode_getattr_maxsz)
681 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_getattr_maxsz)
685 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
686 decode_sequence_maxsz + \
687 decode_putfh_maxsz + \
688 decode_getattr_maxsz)
689 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
690 encode_sequence_maxsz + \
691 encode_putfh_maxsz + \
692 encode_statfs_maxsz)
693 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_putfh_maxsz + \
696 decode_statfs_maxsz)
697 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_getattr_maxsz)
701 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_getattr_maxsz)
705 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_delegreturn_maxsz + \
709 encode_getattr_maxsz)
710 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
711 decode_sequence_maxsz + \
712 decode_delegreturn_maxsz + \
713 decode_getattr_maxsz)
714 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
715 encode_sequence_maxsz + \
716 encode_putfh_maxsz + \
717 encode_getacl_maxsz)
718 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
719 decode_sequence_maxsz + \
720 decode_putfh_maxsz + \
721 decode_getacl_maxsz)
722 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
723 encode_sequence_maxsz + \
724 encode_putfh_maxsz + \
725 encode_setacl_maxsz)
726 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
727 decode_sequence_maxsz + \
728 decode_putfh_maxsz + \
729 decode_setacl_maxsz)
730 #define NFS4_enc_fs_locations_sz \
731 (compound_encode_hdr_maxsz + \
732 encode_sequence_maxsz + \
733 encode_putfh_maxsz + \
734 encode_lookup_maxsz + \
735 encode_fs_locations_maxsz + \
736 encode_renew_maxsz)
737 #define NFS4_dec_fs_locations_sz \
738 (compound_decode_hdr_maxsz + \
739 decode_sequence_maxsz + \
740 decode_putfh_maxsz + \
741 decode_lookup_maxsz + \
742 decode_fs_locations_maxsz + \
743 decode_renew_maxsz)
744 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
745 encode_sequence_maxsz + \
746 encode_putfh_maxsz + \
747 encode_secinfo_maxsz)
748 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
749 decode_sequence_maxsz + \
750 decode_putfh_maxsz + \
751 decode_secinfo_maxsz)
752 #define NFS4_enc_fsid_present_sz \
753 (compound_encode_hdr_maxsz + \
754 encode_sequence_maxsz + \
755 encode_putfh_maxsz + \
756 encode_getfh_maxsz + \
757 encode_renew_maxsz)
758 #define NFS4_dec_fsid_present_sz \
759 (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_getfh_maxsz + \
763 decode_renew_maxsz)
764 #if defined(CONFIG_NFS_V4_1)
765 #define NFS4_enc_bind_conn_to_session_sz \
766 (compound_encode_hdr_maxsz + \
767 encode_bind_conn_to_session_maxsz)
768 #define NFS4_dec_bind_conn_to_session_sz \
769 (compound_decode_hdr_maxsz + \
770 decode_bind_conn_to_session_maxsz)
771 #define NFS4_enc_exchange_id_sz \
772 (compound_encode_hdr_maxsz + \
773 encode_exchange_id_maxsz)
774 #define NFS4_dec_exchange_id_sz \
775 (compound_decode_hdr_maxsz + \
776 decode_exchange_id_maxsz)
777 #define NFS4_enc_create_session_sz \
778 (compound_encode_hdr_maxsz + \
779 encode_create_session_maxsz)
780 #define NFS4_dec_create_session_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_create_session_maxsz)
783 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
784 encode_destroy_session_maxsz)
785 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
786 decode_destroy_session_maxsz)
787 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
788 encode_destroy_clientid_maxsz)
789 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
790 decode_destroy_clientid_maxsz)
791 #define NFS4_enc_sequence_sz \
792 (compound_decode_hdr_maxsz + \
793 encode_sequence_maxsz)
794 #define NFS4_dec_sequence_sz \
795 (compound_decode_hdr_maxsz + \
796 decode_sequence_maxsz)
797 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
798 encode_sequence_maxsz + \
799 encode_putrootfh_maxsz + \
800 encode_fsinfo_maxsz)
801 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
802 decode_sequence_maxsz + \
803 decode_putrootfh_maxsz + \
804 decode_fsinfo_maxsz)
805 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
806 encode_sequence_maxsz + \
807 encode_reclaim_complete_maxsz)
808 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
809 decode_sequence_maxsz + \
810 decode_reclaim_complete_maxsz)
811 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
812 encode_sequence_maxsz +\
813 encode_getdeviceinfo_maxsz)
814 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
815 decode_sequence_maxsz + \
816 decode_getdeviceinfo_maxsz)
817 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
818 encode_sequence_maxsz + \
819 encode_putfh_maxsz + \
820 encode_layoutget_maxsz)
821 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
822 decode_sequence_maxsz + \
823 decode_putfh_maxsz + \
824 decode_layoutget_maxsz)
825 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
826 encode_sequence_maxsz +\
827 encode_putfh_maxsz + \
828 encode_layoutcommit_maxsz + \
829 encode_getattr_maxsz)
830 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
831 decode_sequence_maxsz + \
832 decode_putfh_maxsz + \
833 decode_layoutcommit_maxsz + \
834 decode_getattr_maxsz)
835 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
836 encode_sequence_maxsz + \
837 encode_putfh_maxsz + \
838 encode_layoutreturn_maxsz)
839 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
840 decode_sequence_maxsz + \
841 decode_putfh_maxsz + \
842 decode_layoutreturn_maxsz)
843 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
844 encode_sequence_maxsz + \
845 encode_putrootfh_maxsz +\
846 encode_secinfo_no_name_maxsz)
847 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
848 decode_sequence_maxsz + \
849 decode_putrootfh_maxsz + \
850 decode_secinfo_no_name_maxsz)
851 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
852 encode_sequence_maxsz + \
853 encode_test_stateid_maxsz)
854 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
855 decode_sequence_maxsz + \
856 decode_test_stateid_maxsz)
857 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
858 encode_sequence_maxsz + \
859 encode_free_stateid_maxsz)
860 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
861 decode_sequence_maxsz + \
862 decode_free_stateid_maxsz)
863
864 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
865 compound_encode_hdr_maxsz +
866 encode_sequence_maxsz +
867 encode_putfh_maxsz +
868 encode_getattr_maxsz) *
869 XDR_UNIT);
870
871 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
872 compound_decode_hdr_maxsz +
873 decode_sequence_maxsz +
874 decode_putfh_maxsz) *
875 XDR_UNIT);
876
877 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
878 compound_decode_hdr_maxsz +
879 decode_sequence_maxsz) *
880 XDR_UNIT);
881 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
882 #endif /* CONFIG_NFS_V4_1 */
883
884 static const umode_t nfs_type2fmt[] = {
885 [NF4BAD] = 0,
886 [NF4REG] = S_IFREG,
887 [NF4DIR] = S_IFDIR,
888 [NF4BLK] = S_IFBLK,
889 [NF4CHR] = S_IFCHR,
890 [NF4LNK] = S_IFLNK,
891 [NF4SOCK] = S_IFSOCK,
892 [NF4FIFO] = S_IFIFO,
893 [NF4ATTRDIR] = 0,
894 [NF4NAMEDATTR] = 0,
895 };
896
897 struct compound_hdr {
898 int32_t status;
899 uint32_t nops;
900 __be32 * nops_p;
901 uint32_t taglen;
902 char * tag;
903 uint32_t replen; /* expected reply words */
904 u32 minorversion;
905 };
906
907 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
908 {
909 __be32 *p = xdr_reserve_space(xdr, nbytes);
910 BUG_ON(!p);
911 return p;
912 }
913
914 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
915 {
916 __be32 *p;
917
918 p = xdr_reserve_space(xdr, len);
919 xdr_encode_opaque_fixed(p, buf, len);
920 }
921
922 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
923 {
924 __be32 *p;
925
926 p = reserve_space(xdr, 4 + len);
927 xdr_encode_opaque(p, str, len);
928 }
929
930 static void encode_uint32(struct xdr_stream *xdr, u32 n)
931 {
932 __be32 *p;
933
934 p = reserve_space(xdr, 4);
935 *p = cpu_to_be32(n);
936 }
937
938 static void encode_uint64(struct xdr_stream *xdr, u64 n)
939 {
940 __be32 *p;
941
942 p = reserve_space(xdr, 8);
943 xdr_encode_hyper(p, n);
944 }
945
946 static void encode_nfs4_seqid(struct xdr_stream *xdr,
947 const struct nfs_seqid *seqid)
948 {
949 if (seqid != NULL)
950 encode_uint32(xdr, seqid->sequence->counter);
951 else
952 encode_uint32(xdr, 0);
953 }
954
955 static void encode_compound_hdr(struct xdr_stream *xdr,
956 struct rpc_rqst *req,
957 struct compound_hdr *hdr)
958 {
959 __be32 *p;
960 struct rpc_auth *auth = req->rq_cred->cr_auth;
961
962 /* initialize running count of expected bytes in reply.
963 * NOTE: the replied tag SHOULD be the same is the one sent,
964 * but this is not required as a MUST for the server to do so. */
965 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
966
967 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
968 encode_string(xdr, hdr->taglen, hdr->tag);
969 p = reserve_space(xdr, 8);
970 *p++ = cpu_to_be32(hdr->minorversion);
971 hdr->nops_p = p;
972 *p = cpu_to_be32(hdr->nops);
973 }
974
975 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
976 uint32_t replen,
977 struct compound_hdr *hdr)
978 {
979 encode_uint32(xdr, op);
980 hdr->nops++;
981 hdr->replen += replen;
982 }
983
984 static void encode_nops(struct compound_hdr *hdr)
985 {
986 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
987 *hdr->nops_p = htonl(hdr->nops);
988 }
989
990 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
991 {
992 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
993 }
994
995 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
996 {
997 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
998 }
999
1000 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1001 const struct nfs4_label *label,
1002 const struct nfs_server *server)
1003 {
1004 char owner_name[IDMAP_NAMESZ];
1005 char owner_group[IDMAP_NAMESZ];
1006 int owner_namelen = 0;
1007 int owner_grouplen = 0;
1008 __be32 *p;
1009 unsigned i;
1010 uint32_t len = 0;
1011 uint32_t bmval_len;
1012 uint32_t bmval[3] = { 0 };
1013
1014 /*
1015 * We reserve enough space to write the entire attribute buffer at once.
1016 * In the worst-case, this would be
1017 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1018 * = 40 bytes, plus any contribution from variable-length fields
1019 * such as owner/group.
1020 */
1021 if (iap->ia_valid & ATTR_SIZE) {
1022 bmval[0] |= FATTR4_WORD0_SIZE;
1023 len += 8;
1024 }
1025 if (iap->ia_valid & ATTR_MODE) {
1026 bmval[1] |= FATTR4_WORD1_MODE;
1027 len += 4;
1028 }
1029 if (iap->ia_valid & ATTR_UID) {
1030 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1031 if (owner_namelen < 0) {
1032 dprintk("nfs: couldn't resolve uid %d to string\n",
1033 from_kuid(&init_user_ns, iap->ia_uid));
1034 /* XXX */
1035 strcpy(owner_name, "nobody");
1036 owner_namelen = sizeof("nobody") - 1;
1037 /* goto out; */
1038 }
1039 bmval[1] |= FATTR4_WORD1_OWNER;
1040 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1041 }
1042 if (iap->ia_valid & ATTR_GID) {
1043 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1044 if (owner_grouplen < 0) {
1045 dprintk("nfs: couldn't resolve gid %d to string\n",
1046 from_kgid(&init_user_ns, iap->ia_gid));
1047 strcpy(owner_group, "nobody");
1048 owner_grouplen = sizeof("nobody") - 1;
1049 /* goto out; */
1050 }
1051 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1052 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1053 }
1054 if (iap->ia_valid & ATTR_ATIME_SET) {
1055 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1056 len += 16;
1057 } else if (iap->ia_valid & ATTR_ATIME) {
1058 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1059 len += 4;
1060 }
1061 if (iap->ia_valid & ATTR_MTIME_SET) {
1062 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1063 len += 16;
1064 } else if (iap->ia_valid & ATTR_MTIME) {
1065 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1066 len += 4;
1067 }
1068 if (label) {
1069 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1070 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1071 }
1072
1073 if (bmval[2] != 0)
1074 bmval_len = 3;
1075 else if (bmval[1] != 0)
1076 bmval_len = 2;
1077 else
1078 bmval_len = 1;
1079
1080 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1081
1082 *p++ = cpu_to_be32(bmval_len);
1083 for (i = 0; i < bmval_len; i++)
1084 *p++ = cpu_to_be32(bmval[i]);
1085 *p++ = cpu_to_be32(len);
1086
1087 if (bmval[0] & FATTR4_WORD0_SIZE)
1088 p = xdr_encode_hyper(p, iap->ia_size);
1089 if (bmval[1] & FATTR4_WORD1_MODE)
1090 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1091 if (bmval[1] & FATTR4_WORD1_OWNER)
1092 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1093 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1094 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1095 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1096 if (iap->ia_valid & ATTR_ATIME_SET) {
1097 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1098 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1099 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1100 } else
1101 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1102 }
1103 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1104 if (iap->ia_valid & ATTR_MTIME_SET) {
1105 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1106 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1107 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1108 } else
1109 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1110 }
1111 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1112 *p++ = cpu_to_be32(label->lfs);
1113 *p++ = cpu_to_be32(label->pi);
1114 *p++ = cpu_to_be32(label->len);
1115 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1116 }
1117
1118 /* out: */
1119 }
1120
1121 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1122 {
1123 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1124 encode_uint32(xdr, access);
1125 }
1126
1127 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1128 {
1129 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1130 encode_nfs4_seqid(xdr, arg->seqid);
1131 encode_nfs4_stateid(xdr, &arg->stateid);
1132 }
1133
1134 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1135 {
1136 __be32 *p;
1137
1138 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1139 p = reserve_space(xdr, 12);
1140 p = xdr_encode_hyper(p, args->offset);
1141 *p = cpu_to_be32(args->count);
1142 }
1143
1144 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1145 {
1146 __be32 *p;
1147
1148 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1149 encode_uint32(xdr, create->ftype);
1150
1151 switch (create->ftype) {
1152 case NF4LNK:
1153 p = reserve_space(xdr, 4);
1154 *p = cpu_to_be32(create->u.symlink.len);
1155 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1156 break;
1157
1158 case NF4BLK: case NF4CHR:
1159 p = reserve_space(xdr, 8);
1160 *p++ = cpu_to_be32(create->u.device.specdata1);
1161 *p = cpu_to_be32(create->u.device.specdata2);
1162 break;
1163
1164 default:
1165 break;
1166 }
1167
1168 encode_string(xdr, create->name->len, create->name->name);
1169 encode_attrs(xdr, create->attrs, create->label, create->server);
1170 }
1171
1172 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1173 {
1174 __be32 *p;
1175
1176 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177 p = reserve_space(xdr, 8);
1178 *p++ = cpu_to_be32(1);
1179 *p = cpu_to_be32(bitmap);
1180 }
1181
1182 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1183 {
1184 __be32 *p;
1185
1186 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1187 p = reserve_space(xdr, 12);
1188 *p++ = cpu_to_be32(2);
1189 *p++ = cpu_to_be32(bm0);
1190 *p = cpu_to_be32(bm1);
1191 }
1192
1193 static void
1194 encode_getattr_three(struct xdr_stream *xdr,
1195 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1196 struct compound_hdr *hdr)
1197 {
1198 __be32 *p;
1199
1200 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1201 if (bm2) {
1202 p = reserve_space(xdr, 16);
1203 *p++ = cpu_to_be32(3);
1204 *p++ = cpu_to_be32(bm0);
1205 *p++ = cpu_to_be32(bm1);
1206 *p = cpu_to_be32(bm2);
1207 } else if (bm1) {
1208 p = reserve_space(xdr, 12);
1209 *p++ = cpu_to_be32(2);
1210 *p++ = cpu_to_be32(bm0);
1211 *p = cpu_to_be32(bm1);
1212 } else {
1213 p = reserve_space(xdr, 8);
1214 *p++ = cpu_to_be32(1);
1215 *p = cpu_to_be32(bm0);
1216 }
1217 }
1218
1219 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1220 {
1221 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1222 bitmask[1] & nfs4_fattr_bitmap[1],
1223 bitmask[2] & nfs4_fattr_bitmap[2],
1224 hdr);
1225 }
1226
1227 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1228 const u32 *open_bitmap,
1229 struct compound_hdr *hdr)
1230 {
1231 encode_getattr_three(xdr,
1232 bitmask[0] & open_bitmap[0],
1233 bitmask[1] & open_bitmap[1],
1234 bitmask[2] & open_bitmap[2],
1235 hdr);
1236 }
1237
1238 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1239 {
1240 encode_getattr_three(xdr,
1241 bitmask[0] & nfs4_fsinfo_bitmap[0],
1242 bitmask[1] & nfs4_fsinfo_bitmap[1],
1243 bitmask[2] & nfs4_fsinfo_bitmap[2],
1244 hdr);
1245 }
1246
1247 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1248 {
1249 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1250 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1251 }
1252
1253 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1254 {
1255 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1256 }
1257
1258 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1259 {
1260 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1261 encode_string(xdr, name->len, name->name);
1262 }
1263
1264 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1265 {
1266 if (fl->fl_type == F_RDLCK)
1267 return block ? NFS4_READW_LT : NFS4_READ_LT;
1268 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1269 }
1270
1271 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1272 {
1273 if (fl->fl_end == OFFSET_MAX)
1274 return ~(uint64_t)0;
1275 return fl->fl_end - fl->fl_start + 1;
1276 }
1277
1278 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1279 {
1280 __be32 *p;
1281
1282 p = reserve_space(xdr, 32);
1283 p = xdr_encode_hyper(p, lowner->clientid);
1284 *p++ = cpu_to_be32(20);
1285 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1286 *p++ = cpu_to_be32(lowner->s_dev);
1287 xdr_encode_hyper(p, lowner->id);
1288 }
1289
1290 /*
1291 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1292 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1293 */
1294 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1295 {
1296 __be32 *p;
1297
1298 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1299 p = reserve_space(xdr, 28);
1300 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1301 *p++ = cpu_to_be32(args->reclaim);
1302 p = xdr_encode_hyper(p, args->fl->fl_start);
1303 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1304 *p = cpu_to_be32(args->new_lock_owner);
1305 if (args->new_lock_owner){
1306 encode_nfs4_seqid(xdr, args->open_seqid);
1307 encode_nfs4_stateid(xdr, &args->open_stateid);
1308 encode_nfs4_seqid(xdr, args->lock_seqid);
1309 encode_lockowner(xdr, &args->lock_owner);
1310 }
1311 else {
1312 encode_nfs4_stateid(xdr, &args->lock_stateid);
1313 encode_nfs4_seqid(xdr, args->lock_seqid);
1314 }
1315 }
1316
1317 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1318 {
1319 __be32 *p;
1320
1321 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1322 p = reserve_space(xdr, 20);
1323 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1324 p = xdr_encode_hyper(p, args->fl->fl_start);
1325 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1326 encode_lockowner(xdr, &args->lock_owner);
1327 }
1328
1329 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1330 {
1331 __be32 *p;
1332
1333 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1334 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1335 encode_nfs4_seqid(xdr, args->seqid);
1336 encode_nfs4_stateid(xdr, &args->stateid);
1337 p = reserve_space(xdr, 16);
1338 p = xdr_encode_hyper(p, args->fl->fl_start);
1339 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1340 }
1341
1342 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1343 {
1344 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1345 encode_lockowner(xdr, lowner);
1346 }
1347
1348 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1349 {
1350 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1351 encode_string(xdr, name->len, name->name);
1352 }
1353
1354 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1355 {
1356 __be32 *p;
1357
1358 p = reserve_space(xdr, 8);
1359 *p++ = cpu_to_be32(share_access);
1360 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1361 }
1362
1363 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1364 {
1365 __be32 *p;
1366 /*
1367 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1368 * owner 4 = 32
1369 */
1370 encode_nfs4_seqid(xdr, arg->seqid);
1371 encode_share_access(xdr, arg->share_access);
1372 p = reserve_space(xdr, 36);
1373 p = xdr_encode_hyper(p, arg->clientid);
1374 *p++ = cpu_to_be32(24);
1375 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1376 *p++ = cpu_to_be32(arg->server->s_dev);
1377 *p++ = cpu_to_be32(arg->id.uniquifier);
1378 xdr_encode_hyper(p, arg->id.create_time);
1379 }
1380
1381 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1382 {
1383 struct iattr dummy;
1384 __be32 *p;
1385
1386 p = reserve_space(xdr, 4);
1387 switch(arg->createmode) {
1388 case NFS4_CREATE_UNCHECKED:
1389 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1390 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1391 break;
1392 case NFS4_CREATE_GUARDED:
1393 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1394 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1395 break;
1396 case NFS4_CREATE_EXCLUSIVE:
1397 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1398 encode_nfs4_verifier(xdr, &arg->u.verifier);
1399 break;
1400 case NFS4_CREATE_EXCLUSIVE4_1:
1401 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1402 encode_nfs4_verifier(xdr, &arg->u.verifier);
1403 dummy.ia_valid = 0;
1404 encode_attrs(xdr, &dummy, arg->label, arg->server);
1405 }
1406 }
1407
1408 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1409 {
1410 __be32 *p;
1411
1412 p = reserve_space(xdr, 4);
1413 switch (arg->open_flags & O_CREAT) {
1414 case 0:
1415 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1416 break;
1417 default:
1418 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1419 encode_createmode(xdr, arg);
1420 }
1421 }
1422
1423 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1424 {
1425 __be32 *p;
1426
1427 p = reserve_space(xdr, 4);
1428 switch (delegation_type) {
1429 case 0:
1430 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1431 break;
1432 case FMODE_READ:
1433 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1434 break;
1435 case FMODE_WRITE|FMODE_READ:
1436 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1437 break;
1438 default:
1439 BUG();
1440 }
1441 }
1442
1443 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1444 {
1445 __be32 *p;
1446
1447 p = reserve_space(xdr, 4);
1448 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1449 encode_string(xdr, name->len, name->name);
1450 }
1451
1452 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1453 {
1454 __be32 *p;
1455
1456 p = reserve_space(xdr, 4);
1457 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1458 encode_delegation_type(xdr, type);
1459 }
1460
1461 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1462 {
1463 __be32 *p;
1464
1465 p = reserve_space(xdr, 4);
1466 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1467 encode_nfs4_stateid(xdr, stateid);
1468 encode_string(xdr, name->len, name->name);
1469 }
1470
1471 static inline void encode_claim_fh(struct xdr_stream *xdr)
1472 {
1473 __be32 *p;
1474
1475 p = reserve_space(xdr, 4);
1476 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1477 }
1478
1479 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1485 encode_nfs4_stateid(xdr, stateid);
1486 }
1487
1488 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1489 {
1490 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1491 encode_openhdr(xdr, arg);
1492 encode_opentype(xdr, arg);
1493 switch (arg->claim) {
1494 case NFS4_OPEN_CLAIM_NULL:
1495 encode_claim_null(xdr, arg->name);
1496 break;
1497 case NFS4_OPEN_CLAIM_PREVIOUS:
1498 encode_claim_previous(xdr, arg->u.delegation_type);
1499 break;
1500 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1501 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1502 break;
1503 case NFS4_OPEN_CLAIM_FH:
1504 encode_claim_fh(xdr);
1505 break;
1506 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1507 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1508 break;
1509 default:
1510 BUG();
1511 }
1512 }
1513
1514 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1515 {
1516 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1517 encode_nfs4_stateid(xdr, arg->stateid);
1518 encode_nfs4_seqid(xdr, arg->seqid);
1519 }
1520
1521 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1522 {
1523 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1524 encode_nfs4_stateid(xdr, &arg->stateid);
1525 encode_nfs4_seqid(xdr, arg->seqid);
1526 encode_share_access(xdr, arg->share_access);
1527 }
1528
1529 static void
1530 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1531 {
1532 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1533 encode_string(xdr, fh->size, fh->data);
1534 }
1535
1536 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1537 {
1538 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1539 }
1540
1541 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1542 struct compound_hdr *hdr)
1543 {
1544 __be32 *p;
1545
1546 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1547 encode_nfs4_stateid(xdr, &args->stateid);
1548
1549 p = reserve_space(xdr, 12);
1550 p = xdr_encode_hyper(p, args->offset);
1551 *p = cpu_to_be32(args->count);
1552 }
1553
1554 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1555 {
1556 uint32_t attrs[3] = {
1557 FATTR4_WORD0_RDATTR_ERROR,
1558 FATTR4_WORD1_MOUNTED_ON_FILEID,
1559 };
1560 uint32_t dircount = readdir->count >> 1;
1561 __be32 *p, verf[2];
1562 uint32_t attrlen = 0;
1563 unsigned int i;
1564
1565 if (readdir->plus) {
1566 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1567 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1568 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1569 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1570 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1571 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1572 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1573 dircount >>= 1;
1574 }
1575 /* Use mounted_on_fileid only if the server supports it */
1576 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1577 attrs[0] |= FATTR4_WORD0_FILEID;
1578 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1579 attrs[i] &= readdir->bitmask[i];
1580 if (attrs[i] != 0)
1581 attrlen = i+1;
1582 }
1583
1584 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1585 encode_uint64(xdr, readdir->cookie);
1586 encode_nfs4_verifier(xdr, &readdir->verifier);
1587 p = reserve_space(xdr, 12 + (attrlen << 2));
1588 *p++ = cpu_to_be32(dircount);
1589 *p++ = cpu_to_be32(readdir->count);
1590 *p++ = cpu_to_be32(attrlen);
1591 for (i = 0; i < attrlen; i++)
1592 *p++ = cpu_to_be32(attrs[i]);
1593 memcpy(verf, readdir->verifier.data, sizeof(verf));
1594
1595 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1596 __func__,
1597 (unsigned long long)readdir->cookie,
1598 verf[0], verf[1],
1599 attrs[0] & readdir->bitmask[0],
1600 attrs[1] & readdir->bitmask[1],
1601 attrs[2] & readdir->bitmask[2]);
1602 }
1603
1604 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1605 {
1606 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1607 }
1608
1609 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1610 {
1611 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1612 encode_string(xdr, name->len, name->name);
1613 }
1614
1615 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1616 {
1617 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1618 encode_string(xdr, oldname->len, oldname->name);
1619 encode_string(xdr, newname->len, newname->name);
1620 }
1621
1622 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1623 struct compound_hdr *hdr)
1624 {
1625 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1626 encode_uint64(xdr, clid);
1627 }
1628
1629 static void
1630 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1631 {
1632 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1633 }
1634
1635 static void
1636 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1637 {
1638 __be32 *p;
1639
1640 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1641 encode_nfs4_stateid(xdr, &zero_stateid);
1642 p = reserve_space(xdr, 2*4);
1643 *p++ = cpu_to_be32(1);
1644 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1645 p = reserve_space(xdr, 4);
1646 *p = cpu_to_be32(arg->acl_len);
1647 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1648 }
1649
1650 static void
1651 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652 {
1653 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1654 }
1655
1656 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1657 {
1658 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1659 encode_nfs4_stateid(xdr, &arg->stateid);
1660 encode_attrs(xdr, arg->iap, arg->label, server);
1661 }
1662
1663 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1664 {
1665 __be32 *p;
1666
1667 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1668 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1669
1670 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1671 p = reserve_space(xdr, 4);
1672 *p = cpu_to_be32(setclientid->sc_prog);
1673 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1674 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1675 p = reserve_space(xdr, 4);
1676 *p = cpu_to_be32(setclientid->sc_cb_ident);
1677 }
1678
1679 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1680 {
1681 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1682 decode_setclientid_confirm_maxsz, hdr);
1683 encode_uint64(xdr, arg->clientid);
1684 encode_nfs4_verifier(xdr, &arg->confirm);
1685 }
1686
1687 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1688 struct compound_hdr *hdr)
1689 {
1690 __be32 *p;
1691
1692 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1693 encode_nfs4_stateid(xdr, &args->stateid);
1694
1695 p = reserve_space(xdr, 16);
1696 p = xdr_encode_hyper(p, args->offset);
1697 *p++ = cpu_to_be32(args->stable);
1698 *p = cpu_to_be32(args->count);
1699
1700 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1701 }
1702
1703 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1704 {
1705 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1706 encode_nfs4_stateid(xdr, stateid);
1707 }
1708
1709 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1710 {
1711 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1712 encode_string(xdr, name->len, name->name);
1713 }
1714
1715 #if defined(CONFIG_NFS_V4_1)
1716 /* NFSv4.1 operations */
1717 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1718 struct nfs41_bind_conn_to_session_args *args,
1719 struct compound_hdr *hdr)
1720 {
1721 __be32 *p;
1722
1723 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1724 decode_bind_conn_to_session_maxsz, hdr);
1725 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1726 p = xdr_reserve_space(xdr, 8);
1727 *p++ = cpu_to_be32(args->dir);
1728 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1729 }
1730
1731 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1732 {
1733 unsigned int i;
1734 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1735 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1736 encode_uint32(xdr, op_map->u.words[i]);
1737 }
1738
1739 static void encode_exchange_id(struct xdr_stream *xdr,
1740 struct nfs41_exchange_id_args *args,
1741 struct compound_hdr *hdr)
1742 {
1743 __be32 *p;
1744 char impl_name[IMPL_NAME_LIMIT];
1745 int len = 0;
1746
1747 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1748 encode_nfs4_verifier(xdr, args->verifier);
1749
1750 encode_string(xdr, args->id_len, args->id);
1751
1752 encode_uint32(xdr, args->flags);
1753 encode_uint32(xdr, args->state_protect.how);
1754
1755 switch (args->state_protect.how) {
1756 case SP4_NONE:
1757 break;
1758 case SP4_MACH_CRED:
1759 encode_op_map(xdr, &args->state_protect.enforce);
1760 encode_op_map(xdr, &args->state_protect.allow);
1761 break;
1762 default:
1763 WARN_ON_ONCE(1);
1764 break;
1765 }
1766
1767 if (send_implementation_id &&
1768 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1769 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1770 <= sizeof(impl_name) + 1)
1771 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1772 utsname()->sysname, utsname()->release,
1773 utsname()->version, utsname()->machine);
1774
1775 if (len > 0) {
1776 encode_uint32(xdr, 1); /* implementation id array length=1 */
1777
1778 encode_string(xdr,
1779 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1780 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1781 encode_string(xdr, len, impl_name);
1782 /* just send zeros for nii_date - the date is in nii_name */
1783 p = reserve_space(xdr, 12);
1784 p = xdr_encode_hyper(p, 0);
1785 *p = cpu_to_be32(0);
1786 } else
1787 encode_uint32(xdr, 0); /* implementation id array length=0 */
1788 }
1789
1790 static void encode_create_session(struct xdr_stream *xdr,
1791 struct nfs41_create_session_args *args,
1792 struct compound_hdr *hdr)
1793 {
1794 __be32 *p;
1795 struct nfs_client *clp = args->client;
1796 struct rpc_clnt *clnt = clp->cl_rpcclient;
1797 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1798 u32 max_resp_sz_cached;
1799
1800 /*
1801 * Assumes OPEN is the biggest non-idempotent compound.
1802 * 2 is the verifier.
1803 */
1804 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1805 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1806
1807 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1808 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1809 p = xdr_encode_hyper(p, args->clientid);
1810 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1811 *p++ = cpu_to_be32(args->flags); /*flags */
1812
1813 /* Fore Channel */
1814 *p++ = cpu_to_be32(0); /* header padding size */
1815 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1816 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1817 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1818 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1819 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1820 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1821
1822 /* Back Channel */
1823 *p++ = cpu_to_be32(0); /* header padding size */
1824 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1825 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1826 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1827 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1828 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1829 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1830
1831 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1832 *p++ = cpu_to_be32(1);
1833 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1834
1835 /* authsys_parms rfc1831 */
1836 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1837 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1838 *p++ = cpu_to_be32(0); /* UID */
1839 *p++ = cpu_to_be32(0); /* GID */
1840 *p = cpu_to_be32(0); /* No more gids */
1841 }
1842
1843 static void encode_destroy_session(struct xdr_stream *xdr,
1844 struct nfs4_session *session,
1845 struct compound_hdr *hdr)
1846 {
1847 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1848 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1849 }
1850
1851 static void encode_destroy_clientid(struct xdr_stream *xdr,
1852 uint64_t clientid,
1853 struct compound_hdr *hdr)
1854 {
1855 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1856 encode_uint64(xdr, clientid);
1857 }
1858
1859 static void encode_reclaim_complete(struct xdr_stream *xdr,
1860 struct nfs41_reclaim_complete_args *args,
1861 struct compound_hdr *hdr)
1862 {
1863 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1864 encode_uint32(xdr, args->one_fs);
1865 }
1866 #endif /* CONFIG_NFS_V4_1 */
1867
1868 static void encode_sequence(struct xdr_stream *xdr,
1869 const struct nfs4_sequence_args *args,
1870 struct compound_hdr *hdr)
1871 {
1872 #if defined(CONFIG_NFS_V4_1)
1873 struct nfs4_session *session;
1874 struct nfs4_slot_table *tp;
1875 struct nfs4_slot *slot = args->sa_slot;
1876 __be32 *p;
1877
1878 tp = slot->table;
1879 session = tp->session;
1880 if (!session)
1881 return;
1882
1883 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1884
1885 /*
1886 * Sessionid + seqid + slotid + max slotid + cache_this
1887 */
1888 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1889 "max_slotid=%d cache_this=%d\n",
1890 __func__,
1891 ((u32 *)session->sess_id.data)[0],
1892 ((u32 *)session->sess_id.data)[1],
1893 ((u32 *)session->sess_id.data)[2],
1894 ((u32 *)session->sess_id.data)[3],
1895 slot->seq_nr, slot->slot_nr,
1896 tp->highest_used_slotid, args->sa_cache_this);
1897 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1898 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1899 *p++ = cpu_to_be32(slot->seq_nr);
1900 *p++ = cpu_to_be32(slot->slot_nr);
1901 *p++ = cpu_to_be32(tp->highest_used_slotid);
1902 *p = cpu_to_be32(args->sa_cache_this);
1903 #endif /* CONFIG_NFS_V4_1 */
1904 }
1905
1906 #ifdef CONFIG_NFS_V4_1
1907 static void
1908 encode_getdeviceinfo(struct xdr_stream *xdr,
1909 const struct nfs4_getdeviceinfo_args *args,
1910 struct compound_hdr *hdr)
1911 {
1912 __be32 *p;
1913
1914 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1915 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1916 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1917 NFS4_DEVICEID4_SIZE);
1918 *p++ = cpu_to_be32(args->pdev->layout_type);
1919 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1920
1921 p = reserve_space(xdr, 4 + 4);
1922 *p++ = cpu_to_be32(1); /* bitmap length */
1923 *p++ = cpu_to_be32(args->notify_types);
1924 }
1925
1926 static void
1927 encode_layoutget(struct xdr_stream *xdr,
1928 const struct nfs4_layoutget_args *args,
1929 struct compound_hdr *hdr)
1930 {
1931 __be32 *p;
1932
1933 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1934 p = reserve_space(xdr, 36);
1935 *p++ = cpu_to_be32(0); /* Signal layout available */
1936 *p++ = cpu_to_be32(args->type);
1937 *p++ = cpu_to_be32(args->range.iomode);
1938 p = xdr_encode_hyper(p, args->range.offset);
1939 p = xdr_encode_hyper(p, args->range.length);
1940 p = xdr_encode_hyper(p, args->minlength);
1941 encode_nfs4_stateid(xdr, &args->stateid);
1942 encode_uint32(xdr, args->maxcount);
1943
1944 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1945 __func__,
1946 args->type,
1947 args->range.iomode,
1948 (unsigned long)args->range.offset,
1949 (unsigned long)args->range.length,
1950 args->maxcount);
1951 }
1952
1953 static int
1954 encode_layoutcommit(struct xdr_stream *xdr,
1955 struct inode *inode,
1956 struct nfs4_layoutcommit_args *args,
1957 struct compound_hdr *hdr)
1958 {
1959 __be32 *p;
1960
1961 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1962 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1963
1964 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1965 p = reserve_space(xdr, 20);
1966 /* Only whole file layouts */
1967 p = xdr_encode_hyper(p, 0); /* offset */
1968 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1969 *p = cpu_to_be32(0); /* reclaim */
1970 encode_nfs4_stateid(xdr, &args->stateid);
1971 p = reserve_space(xdr, 20);
1972 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1973 p = xdr_encode_hyper(p, args->lastbytewritten);
1974 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1975 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1976
1977 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1978 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1979 NFS_I(inode)->layout, xdr, args);
1980 } else {
1981 encode_uint32(xdr, args->layoutupdate_len);
1982 if (args->layoutupdate_pages) {
1983 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1984 args->layoutupdate_len);
1985 }
1986 }
1987
1988 return 0;
1989 }
1990
1991 static void
1992 encode_layoutreturn(struct xdr_stream *xdr,
1993 const struct nfs4_layoutreturn_args *args,
1994 struct compound_hdr *hdr)
1995 {
1996 __be32 *p;
1997
1998 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1999 p = reserve_space(xdr, 16);
2000 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2001 *p++ = cpu_to_be32(args->layout_type);
2002 *p++ = cpu_to_be32(args->range.iomode);
2003 *p = cpu_to_be32(RETURN_FILE);
2004 p = reserve_space(xdr, 16);
2005 p = xdr_encode_hyper(p, args->range.offset);
2006 p = xdr_encode_hyper(p, args->range.length);
2007 spin_lock(&args->inode->i_lock);
2008 encode_nfs4_stateid(xdr, &args->stateid);
2009 spin_unlock(&args->inode->i_lock);
2010 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2011 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2012 NFS_I(args->inode)->layout, xdr, args);
2013 } else
2014 encode_uint32(xdr, 0);
2015 }
2016
2017 static int
2018 encode_secinfo_no_name(struct xdr_stream *xdr,
2019 const struct nfs41_secinfo_no_name_args *args,
2020 struct compound_hdr *hdr)
2021 {
2022 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2023 encode_uint32(xdr, args->style);
2024 return 0;
2025 }
2026
2027 static void encode_test_stateid(struct xdr_stream *xdr,
2028 struct nfs41_test_stateid_args *args,
2029 struct compound_hdr *hdr)
2030 {
2031 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2032 encode_uint32(xdr, 1);
2033 encode_nfs4_stateid(xdr, args->stateid);
2034 }
2035
2036 static void encode_free_stateid(struct xdr_stream *xdr,
2037 struct nfs41_free_stateid_args *args,
2038 struct compound_hdr *hdr)
2039 {
2040 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2041 encode_nfs4_stateid(xdr, &args->stateid);
2042 }
2043 #endif /* CONFIG_NFS_V4_1 */
2044
2045 /*
2046 * END OF "GENERIC" ENCODE ROUTINES.
2047 */
2048
2049 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2050 {
2051 #if defined(CONFIG_NFS_V4_1)
2052 struct nfs4_session *session = args->sa_slot->table->session;
2053 if (session)
2054 return session->clp->cl_mvops->minor_version;
2055 #endif /* CONFIG_NFS_V4_1 */
2056 return 0;
2057 }
2058
2059 /*
2060 * Encode an ACCESS request
2061 */
2062 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2063 const struct nfs4_accessargs *args)
2064 {
2065 struct compound_hdr hdr = {
2066 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2067 };
2068
2069 encode_compound_hdr(xdr, req, &hdr);
2070 encode_sequence(xdr, &args->seq_args, &hdr);
2071 encode_putfh(xdr, args->fh, &hdr);
2072 encode_access(xdr, args->access, &hdr);
2073 encode_getfattr(xdr, args->bitmask, &hdr);
2074 encode_nops(&hdr);
2075 }
2076
2077 /*
2078 * Encode LOOKUP request
2079 */
2080 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2081 const struct nfs4_lookup_arg *args)
2082 {
2083 struct compound_hdr hdr = {
2084 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085 };
2086
2087 encode_compound_hdr(xdr, req, &hdr);
2088 encode_sequence(xdr, &args->seq_args, &hdr);
2089 encode_putfh(xdr, args->dir_fh, &hdr);
2090 encode_lookup(xdr, args->name, &hdr);
2091 encode_getfh(xdr, &hdr);
2092 encode_getfattr(xdr, args->bitmask, &hdr);
2093 encode_nops(&hdr);
2094 }
2095
2096 /*
2097 * Encode LOOKUP_ROOT request
2098 */
2099 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2100 struct xdr_stream *xdr,
2101 const struct nfs4_lookup_root_arg *args)
2102 {
2103 struct compound_hdr hdr = {
2104 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105 };
2106
2107 encode_compound_hdr(xdr, req, &hdr);
2108 encode_sequence(xdr, &args->seq_args, &hdr);
2109 encode_putrootfh(xdr, &hdr);
2110 encode_getfh(xdr, &hdr);
2111 encode_getfattr(xdr, args->bitmask, &hdr);
2112 encode_nops(&hdr);
2113 }
2114
2115 /*
2116 * Encode REMOVE request
2117 */
2118 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2119 const struct nfs_removeargs *args)
2120 {
2121 struct compound_hdr hdr = {
2122 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123 };
2124
2125 encode_compound_hdr(xdr, req, &hdr);
2126 encode_sequence(xdr, &args->seq_args, &hdr);
2127 encode_putfh(xdr, args->fh, &hdr);
2128 encode_remove(xdr, &args->name, &hdr);
2129 encode_nops(&hdr);
2130 }
2131
2132 /*
2133 * Encode RENAME request
2134 */
2135 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2136 const struct nfs_renameargs *args)
2137 {
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->old_dir, &hdr);
2145 encode_savefh(xdr, &hdr);
2146 encode_putfh(xdr, args->new_dir, &hdr);
2147 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2148 encode_nops(&hdr);
2149 }
2150
2151 /*
2152 * Encode LINK request
2153 */
2154 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2155 const struct nfs4_link_arg *args)
2156 {
2157 struct compound_hdr hdr = {
2158 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159 };
2160
2161 encode_compound_hdr(xdr, req, &hdr);
2162 encode_sequence(xdr, &args->seq_args, &hdr);
2163 encode_putfh(xdr, args->fh, &hdr);
2164 encode_savefh(xdr, &hdr);
2165 encode_putfh(xdr, args->dir_fh, &hdr);
2166 encode_link(xdr, args->name, &hdr);
2167 encode_restorefh(xdr, &hdr);
2168 encode_getfattr(xdr, args->bitmask, &hdr);
2169 encode_nops(&hdr);
2170 }
2171
2172 /*
2173 * Encode CREATE request
2174 */
2175 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2176 const struct nfs4_create_arg *args)
2177 {
2178 struct compound_hdr hdr = {
2179 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180 };
2181
2182 encode_compound_hdr(xdr, req, &hdr);
2183 encode_sequence(xdr, &args->seq_args, &hdr);
2184 encode_putfh(xdr, args->dir_fh, &hdr);
2185 encode_create(xdr, args, &hdr);
2186 encode_getfh(xdr, &hdr);
2187 encode_getfattr(xdr, args->bitmask, &hdr);
2188 encode_nops(&hdr);
2189 }
2190
2191 /*
2192 * Encode SYMLINK request
2193 */
2194 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2195 const struct nfs4_create_arg *args)
2196 {
2197 nfs4_xdr_enc_create(req, xdr, args);
2198 }
2199
2200 /*
2201 * Encode GETATTR request
2202 */
2203 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2204 const struct nfs4_getattr_arg *args)
2205 {
2206 struct compound_hdr hdr = {
2207 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2208 };
2209
2210 encode_compound_hdr(xdr, req, &hdr);
2211 encode_sequence(xdr, &args->seq_args, &hdr);
2212 encode_putfh(xdr, args->fh, &hdr);
2213 encode_getfattr(xdr, args->bitmask, &hdr);
2214 encode_nops(&hdr);
2215 }
2216
2217 /*
2218 * Encode a CLOSE request
2219 */
2220 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2221 struct nfs_closeargs *args)
2222 {
2223 struct compound_hdr hdr = {
2224 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225 };
2226
2227 encode_compound_hdr(xdr, req, &hdr);
2228 encode_sequence(xdr, &args->seq_args, &hdr);
2229 encode_putfh(xdr, args->fh, &hdr);
2230 encode_close(xdr, args, &hdr);
2231 encode_getfattr(xdr, args->bitmask, &hdr);
2232 encode_nops(&hdr);
2233 }
2234
2235 /*
2236 * Encode an OPEN request
2237 */
2238 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2239 struct nfs_openargs *args)
2240 {
2241 struct compound_hdr hdr = {
2242 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2243 };
2244
2245 encode_compound_hdr(xdr, req, &hdr);
2246 encode_sequence(xdr, &args->seq_args, &hdr);
2247 encode_putfh(xdr, args->fh, &hdr);
2248 encode_open(xdr, args, &hdr);
2249 encode_getfh(xdr, &hdr);
2250 if (args->access)
2251 encode_access(xdr, args->access, &hdr);
2252 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2253 encode_nops(&hdr);
2254 }
2255
2256 /*
2257 * Encode an OPEN_CONFIRM request
2258 */
2259 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2260 struct xdr_stream *xdr,
2261 struct nfs_open_confirmargs *args)
2262 {
2263 struct compound_hdr hdr = {
2264 .nops = 0,
2265 };
2266
2267 encode_compound_hdr(xdr, req, &hdr);
2268 encode_putfh(xdr, args->fh, &hdr);
2269 encode_open_confirm(xdr, args, &hdr);
2270 encode_nops(&hdr);
2271 }
2272
2273 /*
2274 * Encode an OPEN request with no attributes.
2275 */
2276 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2277 struct xdr_stream *xdr,
2278 struct nfs_openargs *args)
2279 {
2280 struct compound_hdr hdr = {
2281 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2282 };
2283
2284 encode_compound_hdr(xdr, req, &hdr);
2285 encode_sequence(xdr, &args->seq_args, &hdr);
2286 encode_putfh(xdr, args->fh, &hdr);
2287 encode_open(xdr, args, &hdr);
2288 if (args->access)
2289 encode_access(xdr, args->access, &hdr);
2290 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2291 encode_nops(&hdr);
2292 }
2293
2294 /*
2295 * Encode an OPEN_DOWNGRADE request
2296 */
2297 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2298 struct xdr_stream *xdr,
2299 struct nfs_closeargs *args)
2300 {
2301 struct compound_hdr hdr = {
2302 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303 };
2304
2305 encode_compound_hdr(xdr, req, &hdr);
2306 encode_sequence(xdr, &args->seq_args, &hdr);
2307 encode_putfh(xdr, args->fh, &hdr);
2308 encode_open_downgrade(xdr, args, &hdr);
2309 encode_getfattr(xdr, args->bitmask, &hdr);
2310 encode_nops(&hdr);
2311 }
2312
2313 /*
2314 * Encode a LOCK request
2315 */
2316 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2317 struct nfs_lock_args *args)
2318 {
2319 struct compound_hdr hdr = {
2320 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321 };
2322
2323 encode_compound_hdr(xdr, req, &hdr);
2324 encode_sequence(xdr, &args->seq_args, &hdr);
2325 encode_putfh(xdr, args->fh, &hdr);
2326 encode_lock(xdr, args, &hdr);
2327 encode_nops(&hdr);
2328 }
2329
2330 /*
2331 * Encode a LOCKT request
2332 */
2333 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2334 struct nfs_lockt_args *args)
2335 {
2336 struct compound_hdr hdr = {
2337 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338 };
2339
2340 encode_compound_hdr(xdr, req, &hdr);
2341 encode_sequence(xdr, &args->seq_args, &hdr);
2342 encode_putfh(xdr, args->fh, &hdr);
2343 encode_lockt(xdr, args, &hdr);
2344 encode_nops(&hdr);
2345 }
2346
2347 /*
2348 * Encode a LOCKU request
2349 */
2350 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2351 struct nfs_locku_args *args)
2352 {
2353 struct compound_hdr hdr = {
2354 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355 };
2356
2357 encode_compound_hdr(xdr, req, &hdr);
2358 encode_sequence(xdr, &args->seq_args, &hdr);
2359 encode_putfh(xdr, args->fh, &hdr);
2360 encode_locku(xdr, args, &hdr);
2361 encode_nops(&hdr);
2362 }
2363
2364 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2365 struct xdr_stream *xdr,
2366 struct nfs_release_lockowner_args *args)
2367 {
2368 struct compound_hdr hdr = {
2369 .minorversion = 0,
2370 };
2371
2372 encode_compound_hdr(xdr, req, &hdr);
2373 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode a READLINK request
2379 */
2380 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2381 const struct nfs4_readlink *args)
2382 {
2383 struct compound_hdr hdr = {
2384 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385 };
2386
2387 encode_compound_hdr(xdr, req, &hdr);
2388 encode_sequence(xdr, &args->seq_args, &hdr);
2389 encode_putfh(xdr, args->fh, &hdr);
2390 encode_readlink(xdr, args, req, &hdr);
2391
2392 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2393 args->pgbase, args->pglen);
2394 encode_nops(&hdr);
2395 }
2396
2397 /*
2398 * Encode a READDIR request
2399 */
2400 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2401 const struct nfs4_readdir_arg *args)
2402 {
2403 struct compound_hdr hdr = {
2404 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405 };
2406
2407 encode_compound_hdr(xdr, req, &hdr);
2408 encode_sequence(xdr, &args->seq_args, &hdr);
2409 encode_putfh(xdr, args->fh, &hdr);
2410 encode_readdir(xdr, args, req, &hdr);
2411
2412 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2413 args->pgbase, args->count);
2414 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2415 __func__, hdr.replen << 2, args->pages,
2416 args->pgbase, args->count);
2417 encode_nops(&hdr);
2418 }
2419
2420 /*
2421 * Encode a READ request
2422 */
2423 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2424 struct nfs_pgio_args *args)
2425 {
2426 struct compound_hdr hdr = {
2427 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428 };
2429
2430 encode_compound_hdr(xdr, req, &hdr);
2431 encode_sequence(xdr, &args->seq_args, &hdr);
2432 encode_putfh(xdr, args->fh, &hdr);
2433 encode_read(xdr, args, &hdr);
2434
2435 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2436 args->pages, args->pgbase, args->count);
2437 req->rq_rcv_buf.flags |= XDRBUF_READ;
2438 encode_nops(&hdr);
2439 }
2440
2441 /*
2442 * Encode an SETATTR request
2443 */
2444 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2445 struct nfs_setattrargs *args)
2446 {
2447 struct compound_hdr hdr = {
2448 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449 };
2450
2451 encode_compound_hdr(xdr, req, &hdr);
2452 encode_sequence(xdr, &args->seq_args, &hdr);
2453 encode_putfh(xdr, args->fh, &hdr);
2454 encode_setattr(xdr, args, args->server, &hdr);
2455 encode_getfattr(xdr, args->bitmask, &hdr);
2456 encode_nops(&hdr);
2457 }
2458
2459 /*
2460 * Encode a GETACL request
2461 */
2462 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2463 struct nfs_getaclargs *args)
2464 {
2465 struct compound_hdr hdr = {
2466 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467 };
2468 uint32_t replen;
2469
2470 encode_compound_hdr(xdr, req, &hdr);
2471 encode_sequence(xdr, &args->seq_args, &hdr);
2472 encode_putfh(xdr, args->fh, &hdr);
2473 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2474 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2475
2476 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2477 args->acl_pages, args->acl_pgbase, args->acl_len);
2478
2479 encode_nops(&hdr);
2480 }
2481
2482 /*
2483 * Encode a WRITE request
2484 */
2485 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2486 struct nfs_pgio_args *args)
2487 {
2488 struct compound_hdr hdr = {
2489 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2490 };
2491
2492 encode_compound_hdr(xdr, req, &hdr);
2493 encode_sequence(xdr, &args->seq_args, &hdr);
2494 encode_putfh(xdr, args->fh, &hdr);
2495 encode_write(xdr, args, &hdr);
2496 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2497 if (args->bitmask)
2498 encode_getfattr(xdr, args->bitmask, &hdr);
2499 encode_nops(&hdr);
2500 }
2501
2502 /*
2503 * a COMMIT request
2504 */
2505 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2506 struct nfs_commitargs *args)
2507 {
2508 struct compound_hdr hdr = {
2509 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2510 };
2511
2512 encode_compound_hdr(xdr, req, &hdr);
2513 encode_sequence(xdr, &args->seq_args, &hdr);
2514 encode_putfh(xdr, args->fh, &hdr);
2515 encode_commit(xdr, args, &hdr);
2516 encode_nops(&hdr);
2517 }
2518
2519 /*
2520 * FSINFO request
2521 */
2522 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2523 struct nfs4_fsinfo_arg *args)
2524 {
2525 struct compound_hdr hdr = {
2526 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527 };
2528
2529 encode_compound_hdr(xdr, req, &hdr);
2530 encode_sequence(xdr, &args->seq_args, &hdr);
2531 encode_putfh(xdr, args->fh, &hdr);
2532 encode_fsinfo(xdr, args->bitmask, &hdr);
2533 encode_nops(&hdr);
2534 }
2535
2536 /*
2537 * a PATHCONF request
2538 */
2539 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 const struct nfs4_pathconf_arg *args)
2541 {
2542 struct compound_hdr hdr = {
2543 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544 };
2545
2546 encode_compound_hdr(xdr, req, &hdr);
2547 encode_sequence(xdr, &args->seq_args, &hdr);
2548 encode_putfh(xdr, args->fh, &hdr);
2549 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2550 &hdr);
2551 encode_nops(&hdr);
2552 }
2553
2554 /*
2555 * a STATFS request
2556 */
2557 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2558 const struct nfs4_statfs_arg *args)
2559 {
2560 struct compound_hdr hdr = {
2561 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2562 };
2563
2564 encode_compound_hdr(xdr, req, &hdr);
2565 encode_sequence(xdr, &args->seq_args, &hdr);
2566 encode_putfh(xdr, args->fh, &hdr);
2567 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2568 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2569 encode_nops(&hdr);
2570 }
2571
2572 /*
2573 * GETATTR_BITMAP request
2574 */
2575 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2576 struct xdr_stream *xdr,
2577 struct nfs4_server_caps_arg *args)
2578 {
2579 struct compound_hdr hdr = {
2580 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581 };
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fhandle, &hdr);
2586 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2587 FATTR4_WORD0_FH_EXPIRE_TYPE|
2588 FATTR4_WORD0_LINK_SUPPORT|
2589 FATTR4_WORD0_SYMLINK_SUPPORT|
2590 FATTR4_WORD0_ACLSUPPORT, &hdr);
2591 encode_nops(&hdr);
2592 }
2593
2594 /*
2595 * a RENEW request
2596 */
2597 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2598 struct nfs_client *clp)
2599 {
2600 struct compound_hdr hdr = {
2601 .nops = 0,
2602 };
2603
2604 encode_compound_hdr(xdr, req, &hdr);
2605 encode_renew(xdr, clp->cl_clientid, &hdr);
2606 encode_nops(&hdr);
2607 }
2608
2609 /*
2610 * a SETCLIENTID request
2611 */
2612 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2613 struct xdr_stream *xdr,
2614 struct nfs4_setclientid *sc)
2615 {
2616 struct compound_hdr hdr = {
2617 .nops = 0,
2618 };
2619
2620 encode_compound_hdr(xdr, req, &hdr);
2621 encode_setclientid(xdr, sc, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a SETCLIENTID_CONFIRM request
2627 */
2628 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2629 struct xdr_stream *xdr,
2630 struct nfs4_setclientid_res *arg)
2631 {
2632 struct compound_hdr hdr = {
2633 .nops = 0,
2634 };
2635
2636 encode_compound_hdr(xdr, req, &hdr);
2637 encode_setclientid_confirm(xdr, arg, &hdr);
2638 encode_nops(&hdr);
2639 }
2640
2641 /*
2642 * DELEGRETURN request
2643 */
2644 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2645 struct xdr_stream *xdr,
2646 const struct nfs4_delegreturnargs *args)
2647 {
2648 struct compound_hdr hdr = {
2649 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2650 };
2651
2652 encode_compound_hdr(xdr, req, &hdr);
2653 encode_sequence(xdr, &args->seq_args, &hdr);
2654 encode_putfh(xdr, args->fhandle, &hdr);
2655 encode_getfattr(xdr, args->bitmask, &hdr);
2656 encode_delegreturn(xdr, args->stateid, &hdr);
2657 encode_nops(&hdr);
2658 }
2659
2660 /*
2661 * Encode FS_LOCATIONS request
2662 */
2663 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 struct nfs4_fs_locations_arg *args)
2666 {
2667 struct compound_hdr hdr = {
2668 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2669 };
2670 uint32_t replen;
2671
2672 encode_compound_hdr(xdr, req, &hdr);
2673 encode_sequence(xdr, &args->seq_args, &hdr);
2674 if (args->migration) {
2675 encode_putfh(xdr, args->fh, &hdr);
2676 replen = hdr.replen;
2677 encode_fs_locations(xdr, args->bitmask, &hdr);
2678 if (args->renew)
2679 encode_renew(xdr, args->clientid, &hdr);
2680 } else {
2681 encode_putfh(xdr, args->dir_fh, &hdr);
2682 encode_lookup(xdr, args->name, &hdr);
2683 replen = hdr.replen;
2684 encode_fs_locations(xdr, args->bitmask, &hdr);
2685 }
2686
2687 /* Set up reply kvec to capture returned fs_locations array. */
2688 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2689 0, PAGE_SIZE);
2690 encode_nops(&hdr);
2691 }
2692
2693 /*
2694 * Encode SECINFO request
2695 */
2696 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2697 struct xdr_stream *xdr,
2698 struct nfs4_secinfo_arg *args)
2699 {
2700 struct compound_hdr hdr = {
2701 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702 };
2703
2704 encode_compound_hdr(xdr, req, &hdr);
2705 encode_sequence(xdr, &args->seq_args, &hdr);
2706 encode_putfh(xdr, args->dir_fh, &hdr);
2707 encode_secinfo(xdr, args->name, &hdr);
2708 encode_nops(&hdr);
2709 }
2710
2711 /*
2712 * Encode FSID_PRESENT request
2713 */
2714 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2715 struct xdr_stream *xdr,
2716 struct nfs4_fsid_present_arg *args)
2717 {
2718 struct compound_hdr hdr = {
2719 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2720 };
2721
2722 encode_compound_hdr(xdr, req, &hdr);
2723 encode_sequence(xdr, &args->seq_args, &hdr);
2724 encode_putfh(xdr, args->fh, &hdr);
2725 encode_getfh(xdr, &hdr);
2726 if (args->renew)
2727 encode_renew(xdr, args->clientid, &hdr);
2728 encode_nops(&hdr);
2729 }
2730
2731 #if defined(CONFIG_NFS_V4_1)
2732 /*
2733 * BIND_CONN_TO_SESSION request
2734 */
2735 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2736 struct xdr_stream *xdr,
2737 struct nfs41_bind_conn_to_session_args *args)
2738 {
2739 struct compound_hdr hdr = {
2740 .minorversion = args->client->cl_mvops->minor_version,
2741 };
2742
2743 encode_compound_hdr(xdr, req, &hdr);
2744 encode_bind_conn_to_session(xdr, args, &hdr);
2745 encode_nops(&hdr);
2746 }
2747
2748 /*
2749 * EXCHANGE_ID request
2750 */
2751 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2752 struct xdr_stream *xdr,
2753 struct nfs41_exchange_id_args *args)
2754 {
2755 struct compound_hdr hdr = {
2756 .minorversion = args->client->cl_mvops->minor_version,
2757 };
2758
2759 encode_compound_hdr(xdr, req, &hdr);
2760 encode_exchange_id(xdr, args, &hdr);
2761 encode_nops(&hdr);
2762 }
2763
2764 /*
2765 * a CREATE_SESSION request
2766 */
2767 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 struct nfs41_create_session_args *args)
2770 {
2771 struct compound_hdr hdr = {
2772 .minorversion = args->client->cl_mvops->minor_version,
2773 };
2774
2775 encode_compound_hdr(xdr, req, &hdr);
2776 encode_create_session(xdr, args, &hdr);
2777 encode_nops(&hdr);
2778 }
2779
2780 /*
2781 * a DESTROY_SESSION request
2782 */
2783 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2784 struct xdr_stream *xdr,
2785 struct nfs4_session *session)
2786 {
2787 struct compound_hdr hdr = {
2788 .minorversion = session->clp->cl_mvops->minor_version,
2789 };
2790
2791 encode_compound_hdr(xdr, req, &hdr);
2792 encode_destroy_session(xdr, session, &hdr);
2793 encode_nops(&hdr);
2794 }
2795
2796 /*
2797 * a DESTROY_CLIENTID request
2798 */
2799 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2800 struct xdr_stream *xdr,
2801 struct nfs_client *clp)
2802 {
2803 struct compound_hdr hdr = {
2804 .minorversion = clp->cl_mvops->minor_version,
2805 };
2806
2807 encode_compound_hdr(xdr, req, &hdr);
2808 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2809 encode_nops(&hdr);
2810 }
2811
2812 /*
2813 * a SEQUENCE request
2814 */
2815 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2816 struct nfs4_sequence_args *args)
2817 {
2818 struct compound_hdr hdr = {
2819 .minorversion = nfs4_xdr_minorversion(args),
2820 };
2821
2822 encode_compound_hdr(xdr, req, &hdr);
2823 encode_sequence(xdr, args, &hdr);
2824 encode_nops(&hdr);
2825 }
2826
2827 /*
2828 * a GET_LEASE_TIME request
2829 */
2830 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2831 struct xdr_stream *xdr,
2832 struct nfs4_get_lease_time_args *args)
2833 {
2834 struct compound_hdr hdr = {
2835 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2836 };
2837 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2838
2839 encode_compound_hdr(xdr, req, &hdr);
2840 encode_sequence(xdr, &args->la_seq_args, &hdr);
2841 encode_putrootfh(xdr, &hdr);
2842 encode_fsinfo(xdr, lease_bitmap, &hdr);
2843 encode_nops(&hdr);
2844 }
2845
2846 /*
2847 * a RECLAIM_COMPLETE request
2848 */
2849 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2850 struct xdr_stream *xdr,
2851 struct nfs41_reclaim_complete_args *args)
2852 {
2853 struct compound_hdr hdr = {
2854 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2855 };
2856
2857 encode_compound_hdr(xdr, req, &hdr);
2858 encode_sequence(xdr, &args->seq_args, &hdr);
2859 encode_reclaim_complete(xdr, args, &hdr);
2860 encode_nops(&hdr);
2861 }
2862
2863 /*
2864 * Encode GETDEVICEINFO request
2865 */
2866 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2867 struct xdr_stream *xdr,
2868 struct nfs4_getdeviceinfo_args *args)
2869 {
2870 struct compound_hdr hdr = {
2871 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2872 };
2873
2874 encode_compound_hdr(xdr, req, &hdr);
2875 encode_sequence(xdr, &args->seq_args, &hdr);
2876 encode_getdeviceinfo(xdr, args, &hdr);
2877
2878 /* set up reply kvec. Subtract notification bitmap max size (2)
2879 * so that notification bitmap is put in xdr_buf tail */
2880 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2881 args->pdev->pages, args->pdev->pgbase,
2882 args->pdev->pglen);
2883
2884 encode_nops(&hdr);
2885 }
2886
2887 /*
2888 * Encode LAYOUTGET request
2889 */
2890 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2891 struct xdr_stream *xdr,
2892 struct nfs4_layoutget_args *args)
2893 {
2894 struct compound_hdr hdr = {
2895 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2896 };
2897
2898 encode_compound_hdr(xdr, req, &hdr);
2899 encode_sequence(xdr, &args->seq_args, &hdr);
2900 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2901 encode_layoutget(xdr, args, &hdr);
2902
2903 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2904 args->layout.pages, 0, args->layout.pglen);
2905
2906 encode_nops(&hdr);
2907 }
2908
2909 /*
2910 * Encode LAYOUTCOMMIT request
2911 */
2912 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2913 struct xdr_stream *xdr,
2914 struct nfs4_layoutcommit_args *args)
2915 {
2916 struct nfs4_layoutcommit_data *data =
2917 container_of(args, struct nfs4_layoutcommit_data, args);
2918 struct compound_hdr hdr = {
2919 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920 };
2921
2922 encode_compound_hdr(xdr, req, &hdr);
2923 encode_sequence(xdr, &args->seq_args, &hdr);
2924 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2925 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2926 encode_getfattr(xdr, args->bitmask, &hdr);
2927 encode_nops(&hdr);
2928 }
2929
2930 /*
2931 * Encode LAYOUTRETURN request
2932 */
2933 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2934 struct xdr_stream *xdr,
2935 struct nfs4_layoutreturn_args *args)
2936 {
2937 struct compound_hdr hdr = {
2938 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939 };
2940
2941 encode_compound_hdr(xdr, req, &hdr);
2942 encode_sequence(xdr, &args->seq_args, &hdr);
2943 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2944 encode_layoutreturn(xdr, args, &hdr);
2945 encode_nops(&hdr);
2946 }
2947
2948 /*
2949 * Encode SECINFO_NO_NAME request
2950 */
2951 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2952 struct xdr_stream *xdr,
2953 struct nfs41_secinfo_no_name_args *args)
2954 {
2955 struct compound_hdr hdr = {
2956 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2957 };
2958
2959 encode_compound_hdr(xdr, req, &hdr);
2960 encode_sequence(xdr, &args->seq_args, &hdr);
2961 encode_putrootfh(xdr, &hdr);
2962 encode_secinfo_no_name(xdr, args, &hdr);
2963 encode_nops(&hdr);
2964 return 0;
2965 }
2966
2967 /*
2968 * Encode TEST_STATEID request
2969 */
2970 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2971 struct xdr_stream *xdr,
2972 struct nfs41_test_stateid_args *args)
2973 {
2974 struct compound_hdr hdr = {
2975 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2976 };
2977
2978 encode_compound_hdr(xdr, req, &hdr);
2979 encode_sequence(xdr, &args->seq_args, &hdr);
2980 encode_test_stateid(xdr, args, &hdr);
2981 encode_nops(&hdr);
2982 }
2983
2984 /*
2985 * Encode FREE_STATEID request
2986 */
2987 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2988 struct xdr_stream *xdr,
2989 struct nfs41_free_stateid_args *args)
2990 {
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_free_stateid(xdr, args, &hdr);
2998 encode_nops(&hdr);
2999 }
3000 #endif /* CONFIG_NFS_V4_1 */
3001
3002 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3003 {
3004 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3005 "Remaining buffer length is %tu words.\n",
3006 func, xdr->end - xdr->p);
3007 }
3008
3009 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3010 {
3011 __be32 *p;
3012
3013 p = xdr_inline_decode(xdr, 4);
3014 if (unlikely(!p))
3015 goto out_overflow;
3016 *len = be32_to_cpup(p);
3017 p = xdr_inline_decode(xdr, *len);
3018 if (unlikely(!p))
3019 goto out_overflow;
3020 *string = (char *)p;
3021 return 0;
3022 out_overflow:
3023 print_overflow_msg(__func__, xdr);
3024 return -EIO;
3025 }
3026
3027 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3028 {
3029 __be32 *p;
3030
3031 p = xdr_inline_decode(xdr, 8);
3032 if (unlikely(!p))
3033 goto out_overflow;
3034 hdr->status = be32_to_cpup(p++);
3035 hdr->taglen = be32_to_cpup(p);
3036
3037 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3038 if (unlikely(!p))
3039 goto out_overflow;
3040 hdr->tag = (char *)p;
3041 p += XDR_QUADLEN(hdr->taglen);
3042 hdr->nops = be32_to_cpup(p);
3043 if (unlikely(hdr->nops < 1))
3044 return nfs4_stat_to_errno(hdr->status);
3045 return 0;
3046 out_overflow:
3047 print_overflow_msg(__func__, xdr);
3048 return -EIO;
3049 }
3050
3051 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3052 int *nfs_retval)
3053 {
3054 __be32 *p;
3055 uint32_t opnum;
3056 int32_t nfserr;
3057
3058 p = xdr_inline_decode(xdr, 8);
3059 if (unlikely(!p))
3060 goto out_overflow;
3061 opnum = be32_to_cpup(p++);
3062 if (unlikely(opnum != expected))
3063 goto out_bad_operation;
3064 nfserr = be32_to_cpup(p);
3065 if (nfserr == NFS_OK)
3066 *nfs_retval = 0;
3067 else
3068 *nfs_retval = nfs4_stat_to_errno(nfserr);
3069 return true;
3070 out_bad_operation:
3071 dprintk("nfs: Server returned operation"
3072 " %d but we issued a request for %d\n",
3073 opnum, expected);
3074 *nfs_retval = -EREMOTEIO;
3075 return false;
3076 out_overflow:
3077 print_overflow_msg(__func__, xdr);
3078 *nfs_retval = -EIO;
3079 return false;
3080 }
3081
3082 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3083 {
3084 int retval;
3085
3086 __decode_op_hdr(xdr, expected, &retval);
3087 return retval;
3088 }
3089
3090 /* Dummy routine */
3091 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3092 {
3093 __be32 *p;
3094 unsigned int strlen;
3095 char *str;
3096
3097 p = xdr_inline_decode(xdr, 12);
3098 if (likely(p))
3099 return decode_opaque_inline(xdr, &strlen, &str);
3100 print_overflow_msg(__func__, xdr);
3101 return -EIO;
3102 }
3103
3104 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3105 {
3106 uint32_t bmlen;
3107 __be32 *p;
3108
3109 p = xdr_inline_decode(xdr, 4);
3110 if (unlikely(!p))
3111 goto out_overflow;
3112 bmlen = be32_to_cpup(p);
3113
3114 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3115 p = xdr_inline_decode(xdr, (bmlen << 2));
3116 if (unlikely(!p))
3117 goto out_overflow;
3118 if (bmlen > 0) {
3119 bitmap[0] = be32_to_cpup(p++);
3120 if (bmlen > 1) {
3121 bitmap[1] = be32_to_cpup(p++);
3122 if (bmlen > 2)
3123 bitmap[2] = be32_to_cpup(p);
3124 }
3125 }
3126 return 0;
3127 out_overflow:
3128 print_overflow_msg(__func__, xdr);
3129 return -EIO;
3130 }
3131
3132 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3133 {
3134 __be32 *p;
3135
3136 p = xdr_inline_decode(xdr, 4);
3137 if (unlikely(!p))
3138 goto out_overflow;
3139 *attrlen = be32_to_cpup(p);
3140 *savep = xdr_stream_pos(xdr);
3141 return 0;
3142 out_overflow:
3143 print_overflow_msg(__func__, xdr);
3144 return -EIO;
3145 }
3146
3147 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3148 {
3149 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3150 int ret;
3151 ret = decode_attr_bitmap(xdr, bitmask);
3152 if (unlikely(ret < 0))
3153 return ret;
3154 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3155 } else
3156 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3157 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3158 bitmask[0], bitmask[1], bitmask[2]);
3159 return 0;
3160 }
3161
3162 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3163 {
3164 __be32 *p;
3165 int ret = 0;
3166
3167 *type = 0;
3168 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3169 return -EIO;
3170 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3171 p = xdr_inline_decode(xdr, 4);
3172 if (unlikely(!p))
3173 goto out_overflow;
3174 *type = be32_to_cpup(p);
3175 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3176 dprintk("%s: bad type %d\n", __func__, *type);
3177 return -EIO;
3178 }
3179 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3180 ret = NFS_ATTR_FATTR_TYPE;
3181 }
3182 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3183 return ret;
3184 out_overflow:
3185 print_overflow_msg(__func__, xdr);
3186 return -EIO;
3187 }
3188
3189 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3190 uint32_t *bitmap, uint32_t *type)
3191 {
3192 __be32 *p;
3193
3194 *type = 0;
3195 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3196 return -EIO;
3197 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3198 p = xdr_inline_decode(xdr, 4);
3199 if (unlikely(!p))
3200 goto out_overflow;
3201 *type = be32_to_cpup(p);
3202 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3203 }
3204 dprintk("%s: expire type=0x%x\n", __func__, *type);
3205 return 0;
3206 out_overflow:
3207 print_overflow_msg(__func__, xdr);
3208 return -EIO;
3209 }
3210
3211 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3212 {
3213 __be32 *p;
3214 int ret = 0;
3215
3216 *change = 0;
3217 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3218 return -EIO;
3219 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3220 p = xdr_inline_decode(xdr, 8);
3221 if (unlikely(!p))
3222 goto out_overflow;
3223 xdr_decode_hyper(p, change);
3224 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3225 ret = NFS_ATTR_FATTR_CHANGE;
3226 }
3227 dprintk("%s: change attribute=%Lu\n", __func__,
3228 (unsigned long long)*change);
3229 return ret;
3230 out_overflow:
3231 print_overflow_msg(__func__, xdr);
3232 return -EIO;
3233 }
3234
3235 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3236 {
3237 __be32 *p;
3238 int ret = 0;
3239
3240 *size = 0;
3241 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3242 return -EIO;
3243 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3244 p = xdr_inline_decode(xdr, 8);
3245 if (unlikely(!p))
3246 goto out_overflow;
3247 xdr_decode_hyper(p, size);
3248 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3249 ret = NFS_ATTR_FATTR_SIZE;
3250 }
3251 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3252 return ret;
3253 out_overflow:
3254 print_overflow_msg(__func__, xdr);
3255 return -EIO;
3256 }
3257
3258 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3259 {
3260 __be32 *p;
3261
3262 *res = 0;
3263 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3264 return -EIO;
3265 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3266 p = xdr_inline_decode(xdr, 4);
3267 if (unlikely(!p))
3268 goto out_overflow;
3269 *res = be32_to_cpup(p);
3270 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3271 }
3272 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3273 return 0;
3274 out_overflow:
3275 print_overflow_msg(__func__, xdr);
3276 return -EIO;
3277 }
3278
3279 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3280 {
3281 __be32 *p;
3282
3283 *res = 0;
3284 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3285 return -EIO;
3286 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3287 p = xdr_inline_decode(xdr, 4);
3288 if (unlikely(!p))
3289 goto out_overflow;
3290 *res = be32_to_cpup(p);
3291 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3292 }
3293 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3294 return 0;
3295 out_overflow:
3296 print_overflow_msg(__func__, xdr);
3297 return -EIO;
3298 }
3299
3300 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3301 {
3302 __be32 *p;
3303 int ret = 0;
3304
3305 fsid->major = 0;
3306 fsid->minor = 0;
3307 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3308 return -EIO;
3309 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3310 p = xdr_inline_decode(xdr, 16);
3311 if (unlikely(!p))
3312 goto out_overflow;
3313 p = xdr_decode_hyper(p, &fsid->major);
3314 xdr_decode_hyper(p, &fsid->minor);
3315 bitmap[0] &= ~FATTR4_WORD0_FSID;
3316 ret = NFS_ATTR_FATTR_FSID;
3317 }
3318 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3319 (unsigned long long)fsid->major,
3320 (unsigned long long)fsid->minor);
3321 return ret;
3322 out_overflow:
3323 print_overflow_msg(__func__, xdr);
3324 return -EIO;
3325 }
3326
3327 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3328 {
3329 __be32 *p;
3330
3331 *res = 60;
3332 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3333 return -EIO;
3334 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3335 p = xdr_inline_decode(xdr, 4);
3336 if (unlikely(!p))
3337 goto out_overflow;
3338 *res = be32_to_cpup(p);
3339 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3340 }
3341 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3342 return 0;
3343 out_overflow:
3344 print_overflow_msg(__func__, xdr);
3345 return -EIO;
3346 }
3347
3348 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3349 {
3350 __be32 *p;
3351
3352 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3353 return -EIO;
3354 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3355 p = xdr_inline_decode(xdr, 4);
3356 if (unlikely(!p))
3357 goto out_overflow;
3358 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3359 *res = -be32_to_cpup(p);
3360 }
3361 return 0;
3362 out_overflow:
3363 print_overflow_msg(__func__, xdr);
3364 return -EIO;
3365 }
3366
3367 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3368 {
3369 __be32 *p;
3370 int len;
3371
3372 if (fh != NULL)
3373 memset(fh, 0, sizeof(*fh));
3374
3375 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3376 return -EIO;
3377 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3378 p = xdr_inline_decode(xdr, 4);
3379 if (unlikely(!p))
3380 goto out_overflow;
3381 len = be32_to_cpup(p);
3382 if (len > NFS4_FHSIZE)
3383 return -EIO;
3384 p = xdr_inline_decode(xdr, len);
3385 if (unlikely(!p))
3386 goto out_overflow;
3387 if (fh != NULL) {
3388 memcpy(fh->data, p, len);
3389 fh->size = len;
3390 }
3391 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3392 }
3393 return 0;
3394 out_overflow:
3395 print_overflow_msg(__func__, xdr);
3396 return -EIO;
3397 }
3398
3399 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3400 {
3401 __be32 *p;
3402
3403 *res = 0;
3404 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3405 return -EIO;
3406 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3407 p = xdr_inline_decode(xdr, 4);
3408 if (unlikely(!p))
3409 goto out_overflow;
3410 *res = be32_to_cpup(p);
3411 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3412 }
3413 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3414 return 0;
3415 out_overflow:
3416 print_overflow_msg(__func__, xdr);
3417 return -EIO;
3418 }
3419
3420 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3421 {
3422 __be32 *p;
3423 int ret = 0;
3424
3425 *fileid = 0;
3426 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3427 return -EIO;
3428 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3429 p = xdr_inline_decode(xdr, 8);
3430 if (unlikely(!p))
3431 goto out_overflow;
3432 xdr_decode_hyper(p, fileid);
3433 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3434 ret = NFS_ATTR_FATTR_FILEID;
3435 }
3436 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3437 return ret;
3438 out_overflow:
3439 print_overflow_msg(__func__, xdr);
3440 return -EIO;
3441 }
3442
3443 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3444 {
3445 __be32 *p;
3446 int ret = 0;
3447
3448 *fileid = 0;
3449 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3450 return -EIO;
3451 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3452 p = xdr_inline_decode(xdr, 8);
3453 if (unlikely(!p))
3454 goto out_overflow;
3455 xdr_decode_hyper(p, fileid);
3456 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3457 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3458 }
3459 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3460 return ret;
3461 out_overflow:
3462 print_overflow_msg(__func__, xdr);
3463 return -EIO;
3464 }
3465
3466 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3467 {
3468 __be32 *p;
3469 int status = 0;
3470
3471 *res = 0;
3472 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3473 return -EIO;
3474 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3475 p = xdr_inline_decode(xdr, 8);
3476 if (unlikely(!p))
3477 goto out_overflow;
3478 xdr_decode_hyper(p, res);
3479 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3480 }
3481 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3482 return status;
3483 out_overflow:
3484 print_overflow_msg(__func__, xdr);
3485 return -EIO;
3486 }
3487
3488 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3489 {
3490 __be32 *p;
3491 int status = 0;
3492
3493 *res = 0;
3494 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3495 return -EIO;
3496 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3497 p = xdr_inline_decode(xdr, 8);
3498 if (unlikely(!p))
3499 goto out_overflow;
3500 xdr_decode_hyper(p, res);
3501 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3502 }
3503 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3504 return status;
3505 out_overflow:
3506 print_overflow_msg(__func__, xdr);
3507 return -EIO;
3508 }
3509
3510 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3511 {
3512 __be32 *p;
3513 int status = 0;
3514
3515 *res = 0;
3516 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3517 return -EIO;
3518 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3519 p = xdr_inline_decode(xdr, 8);
3520 if (unlikely(!p))
3521 goto out_overflow;
3522 xdr_decode_hyper(p, res);
3523 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3524 }
3525 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3526 return status;
3527 out_overflow:
3528 print_overflow_msg(__func__, xdr);
3529 return -EIO;
3530 }
3531
3532 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3533 {
3534 u32 n;
3535 __be32 *p;
3536 int status = 0;
3537
3538 p = xdr_inline_decode(xdr, 4);
3539 if (unlikely(!p))
3540 goto out_overflow;
3541 n = be32_to_cpup(p);
3542 if (n == 0)
3543 goto root_path;
3544 dprintk("pathname4: ");
3545 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3546 dprintk("cannot parse %d components in path\n", n);
3547 goto out_eio;
3548 }
3549 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3550 struct nfs4_string *component = &path->components[path->ncomponents];
3551 status = decode_opaque_inline(xdr, &component->len, &component->data);
3552 if (unlikely(status != 0))
3553 goto out_eio;
3554 ifdebug (XDR)
3555 pr_cont("%s%.*s ",
3556 (path->ncomponents != n ? "/ " : ""),
3557 component->len, component->data);
3558 }
3559 out:
3560 return status;
3561 root_path:
3562 /* a root pathname is sent as a zero component4 */
3563 path->ncomponents = 1;
3564 path->components[0].len=0;
3565 path->components[0].data=NULL;
3566 dprintk("pathname4: /\n");
3567 goto out;
3568 out_eio:
3569 dprintk(" status %d", status);
3570 status = -EIO;
3571 goto out;
3572 out_overflow:
3573 print_overflow_msg(__func__, xdr);
3574 return -EIO;
3575 }
3576
3577 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3578 {
3579 int n;
3580 __be32 *p;
3581 int status = -EIO;
3582
3583 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3584 goto out;
3585 status = 0;
3586 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3587 goto out;
3588 status = -EIO;
3589 /* Ignore borken servers that return unrequested attrs */
3590 if (unlikely(res == NULL))
3591 goto out;
3592 dprintk("%s: fsroot:\n", __func__);
3593 status = decode_pathname(xdr, &res->fs_path);
3594 if (unlikely(status != 0))
3595 goto out;
3596 p = xdr_inline_decode(xdr, 4);
3597 if (unlikely(!p))
3598 goto out_overflow;
3599 n = be32_to_cpup(p);
3600 if (n <= 0)
3601 goto out_eio;
3602 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3603 u32 m;
3604 struct nfs4_fs_location *loc;
3605
3606 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3607 break;
3608 loc = &res->locations[res->nlocations];
3609 p = xdr_inline_decode(xdr, 4);
3610 if (unlikely(!p))
3611 goto out_overflow;
3612 m = be32_to_cpup(p);
3613
3614 dprintk("%s: servers:\n", __func__);
3615 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3616 struct nfs4_string *server;
3617
3618 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3619 unsigned int i;
3620 dprintk("%s: using first %u of %u servers "
3621 "returned for location %u\n",
3622 __func__,
3623 NFS4_FS_LOCATION_MAXSERVERS,
3624 m, res->nlocations);
3625 for (i = loc->nservers; i < m; i++) {
3626 unsigned int len;
3627 char *data;
3628 status = decode_opaque_inline(xdr, &len, &data);
3629 if (unlikely(status != 0))
3630 goto out_eio;
3631 }
3632 break;
3633 }
3634 server = &loc->servers[loc->nservers];
3635 status = decode_opaque_inline(xdr, &server->len, &server->data);
3636 if (unlikely(status != 0))
3637 goto out_eio;
3638 dprintk("%s ", server->data);
3639 }
3640 status = decode_pathname(xdr, &loc->rootpath);
3641 if (unlikely(status != 0))
3642 goto out_eio;
3643 }
3644 if (res->nlocations != 0)
3645 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3646 out:
3647 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3648 return status;
3649 out_overflow:
3650 print_overflow_msg(__func__, xdr);
3651 out_eio:
3652 status = -EIO;
3653 goto out;
3654 }
3655
3656 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3657 {
3658 __be32 *p;
3659 int status = 0;
3660
3661 *res = 0;
3662 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3663 return -EIO;
3664 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3665 p = xdr_inline_decode(xdr, 8);
3666 if (unlikely(!p))
3667 goto out_overflow;
3668 xdr_decode_hyper(p, res);
3669 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3670 }
3671 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3672 return status;
3673 out_overflow:
3674 print_overflow_msg(__func__, xdr);
3675 return -EIO;
3676 }
3677
3678 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3679 {
3680 __be32 *p;
3681 int status = 0;
3682
3683 *maxlink = 1;
3684 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3685 return -EIO;
3686 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3687 p = xdr_inline_decode(xdr, 4);
3688 if (unlikely(!p))
3689 goto out_overflow;
3690 *maxlink = be32_to_cpup(p);
3691 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3692 }
3693 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3694 return status;
3695 out_overflow:
3696 print_overflow_msg(__func__, xdr);
3697 return -EIO;
3698 }
3699
3700 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3701 {
3702 __be32 *p;
3703 int status = 0;
3704
3705 *maxname = 1024;
3706 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3707 return -EIO;
3708 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3709 p = xdr_inline_decode(xdr, 4);
3710 if (unlikely(!p))
3711 goto out_overflow;
3712 *maxname = be32_to_cpup(p);
3713 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3714 }
3715 dprintk("%s: maxname=%u\n", __func__, *maxname);
3716 return status;
3717 out_overflow:
3718 print_overflow_msg(__func__, xdr);
3719 return -EIO;
3720 }
3721
3722 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3723 {
3724 __be32 *p;
3725 int status = 0;
3726
3727 *res = 1024;
3728 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3729 return -EIO;
3730 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3731 uint64_t maxread;
3732 p = xdr_inline_decode(xdr, 8);
3733 if (unlikely(!p))
3734 goto out_overflow;
3735 xdr_decode_hyper(p, &maxread);
3736 if (maxread > 0x7FFFFFFF)
3737 maxread = 0x7FFFFFFF;
3738 *res = (uint32_t)maxread;
3739 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3740 }
3741 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3742 return status;
3743 out_overflow:
3744 print_overflow_msg(__func__, xdr);
3745 return -EIO;
3746 }
3747
3748 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3749 {
3750 __be32 *p;
3751 int status = 0;
3752
3753 *res = 1024;
3754 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3755 return -EIO;
3756 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3757 uint64_t maxwrite;
3758 p = xdr_inline_decode(xdr, 8);
3759 if (unlikely(!p))
3760 goto out_overflow;
3761 xdr_decode_hyper(p, &maxwrite);
3762 if (maxwrite > 0x7FFFFFFF)
3763 maxwrite = 0x7FFFFFFF;
3764 *res = (uint32_t)maxwrite;
3765 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3766 }
3767 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3768 return status;
3769 out_overflow:
3770 print_overflow_msg(__func__, xdr);
3771 return -EIO;
3772 }
3773
3774 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3775 {
3776 uint32_t tmp;
3777 __be32 *p;
3778 int ret = 0;
3779
3780 *mode = 0;
3781 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3782 return -EIO;
3783 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3784 p = xdr_inline_decode(xdr, 4);
3785 if (unlikely(!p))
3786 goto out_overflow;
3787 tmp = be32_to_cpup(p);
3788 *mode = tmp & ~S_IFMT;
3789 bitmap[1] &= ~FATTR4_WORD1_MODE;
3790 ret = NFS_ATTR_FATTR_MODE;
3791 }
3792 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3793 return ret;
3794 out_overflow:
3795 print_overflow_msg(__func__, xdr);
3796 return -EIO;
3797 }
3798
3799 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3800 {
3801 __be32 *p;
3802 int ret = 0;
3803
3804 *nlink = 1;
3805 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3806 return -EIO;
3807 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3808 p = xdr_inline_decode(xdr, 4);
3809 if (unlikely(!p))
3810 goto out_overflow;
3811 *nlink = be32_to_cpup(p);
3812 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3813 ret = NFS_ATTR_FATTR_NLINK;
3814 }
3815 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3816 return ret;
3817 out_overflow:
3818 print_overflow_msg(__func__, xdr);
3819 return -EIO;
3820 }
3821
3822 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3823 const struct nfs_server *server, kuid_t *uid,
3824 struct nfs4_string *owner_name)
3825 {
3826 uint32_t len;
3827 __be32 *p;
3828 int ret = 0;
3829
3830 *uid = make_kuid(&init_user_ns, -2);
3831 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3832 return -EIO;
3833 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3834 p = xdr_inline_decode(xdr, 4);
3835 if (unlikely(!p))
3836 goto out_overflow;
3837 len = be32_to_cpup(p);
3838 p = xdr_inline_decode(xdr, len);
3839 if (unlikely(!p))
3840 goto out_overflow;
3841 if (owner_name != NULL) {
3842 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3843 if (owner_name->data != NULL) {
3844 owner_name->len = len;
3845 ret = NFS_ATTR_FATTR_OWNER_NAME;
3846 }
3847 } else if (len < XDR_MAX_NETOBJ) {
3848 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3849 ret = NFS_ATTR_FATTR_OWNER;
3850 else
3851 dprintk("%s: nfs_map_name_to_uid failed!\n",
3852 __func__);
3853 } else
3854 dprintk("%s: name too long (%u)!\n",
3855 __func__, len);
3856 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3857 }
3858 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3859 return ret;
3860 out_overflow:
3861 print_overflow_msg(__func__, xdr);
3862 return -EIO;
3863 }
3864
3865 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3866 const struct nfs_server *server, kgid_t *gid,
3867 struct nfs4_string *group_name)
3868 {
3869 uint32_t len;
3870 __be32 *p;
3871 int ret = 0;
3872
3873 *gid = make_kgid(&init_user_ns, -2);
3874 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3875 return -EIO;
3876 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3877 p = xdr_inline_decode(xdr, 4);
3878 if (unlikely(!p))
3879 goto out_overflow;
3880 len = be32_to_cpup(p);
3881 p = xdr_inline_decode(xdr, len);
3882 if (unlikely(!p))
3883 goto out_overflow;
3884 if (group_name != NULL) {
3885 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3886 if (group_name->data != NULL) {
3887 group_name->len = len;
3888 ret = NFS_ATTR_FATTR_GROUP_NAME;
3889 }
3890 } else if (len < XDR_MAX_NETOBJ) {
3891 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3892 ret = NFS_ATTR_FATTR_GROUP;
3893 else
3894 dprintk("%s: nfs_map_group_to_gid failed!\n",
3895 __func__);
3896 } else
3897 dprintk("%s: name too long (%u)!\n",
3898 __func__, len);
3899 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3900 }
3901 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3902 return ret;
3903 out_overflow:
3904 print_overflow_msg(__func__, xdr);
3905 return -EIO;
3906 }
3907
3908 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3909 {
3910 uint32_t major = 0, minor = 0;
3911 __be32 *p;
3912 int ret = 0;
3913
3914 *rdev = MKDEV(0,0);
3915 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3916 return -EIO;
3917 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3918 dev_t tmp;
3919
3920 p = xdr_inline_decode(xdr, 8);
3921 if (unlikely(!p))
3922 goto out_overflow;
3923 major = be32_to_cpup(p++);
3924 minor = be32_to_cpup(p);
3925 tmp = MKDEV(major, minor);
3926 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3927 *rdev = tmp;
3928 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3929 ret = NFS_ATTR_FATTR_RDEV;
3930 }
3931 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3932 return ret;
3933 out_overflow:
3934 print_overflow_msg(__func__, xdr);
3935 return -EIO;
3936 }
3937
3938 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3939 {
3940 __be32 *p;
3941 int status = 0;
3942
3943 *res = 0;
3944 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3945 return -EIO;
3946 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3947 p = xdr_inline_decode(xdr, 8);
3948 if (unlikely(!p))
3949 goto out_overflow;
3950 xdr_decode_hyper(p, res);
3951 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3952 }
3953 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3954 return status;
3955 out_overflow:
3956 print_overflow_msg(__func__, xdr);
3957 return -EIO;
3958 }
3959
3960 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3961 {
3962 __be32 *p;
3963 int status = 0;
3964
3965 *res = 0;
3966 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3967 return -EIO;
3968 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3969 p = xdr_inline_decode(xdr, 8);
3970 if (unlikely(!p))
3971 goto out_overflow;
3972 xdr_decode_hyper(p, res);
3973 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3974 }
3975 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3976 return status;
3977 out_overflow:
3978 print_overflow_msg(__func__, xdr);
3979 return -EIO;
3980 }
3981
3982 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3983 {
3984 __be32 *p;
3985 int status = 0;
3986
3987 *res = 0;
3988 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3989 return -EIO;
3990 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3991 p = xdr_inline_decode(xdr, 8);
3992 if (unlikely(!p))
3993 goto out_overflow;
3994 xdr_decode_hyper(p, res);
3995 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3996 }
3997 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3998 return status;
3999 out_overflow:
4000 print_overflow_msg(__func__, xdr);
4001 return -EIO;
4002 }
4003
4004 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4005 {
4006 __be32 *p;
4007 int ret = 0;
4008
4009 *used = 0;
4010 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4011 return -EIO;
4012 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4013 p = xdr_inline_decode(xdr, 8);
4014 if (unlikely(!p))
4015 goto out_overflow;
4016 xdr_decode_hyper(p, used);
4017 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4018 ret = NFS_ATTR_FATTR_SPACE_USED;
4019 }
4020 dprintk("%s: space used=%Lu\n", __func__,
4021 (unsigned long long)*used);
4022 return ret;
4023 out_overflow:
4024 print_overflow_msg(__func__, xdr);
4025 return -EIO;
4026 }
4027
4028 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4029 {
4030 __be32 *p;
4031 uint64_t sec;
4032 uint32_t nsec;
4033
4034 p = xdr_inline_decode(xdr, 12);
4035 if (unlikely(!p))
4036 goto out_overflow;
4037 p = xdr_decode_hyper(p, &sec);
4038 nsec = be32_to_cpup(p);
4039 time->tv_sec = (time_t)sec;
4040 time->tv_nsec = (long)nsec;
4041 return 0;
4042 out_overflow:
4043 print_overflow_msg(__func__, xdr);
4044 return -EIO;
4045 }
4046
4047 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4048 {
4049 int status = 0;
4050
4051 time->tv_sec = 0;
4052 time->tv_nsec = 0;
4053 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4054 return -EIO;
4055 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4056 status = decode_attr_time(xdr, time);
4057 if (status == 0)
4058 status = NFS_ATTR_FATTR_ATIME;
4059 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4060 }
4061 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4062 return status;
4063 }
4064
4065 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4066 {
4067 int status = 0;
4068
4069 time->tv_sec = 0;
4070 time->tv_nsec = 0;
4071 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4072 return -EIO;
4073 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4074 status = decode_attr_time(xdr, time);
4075 if (status == 0)
4076 status = NFS_ATTR_FATTR_CTIME;
4077 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4078 }
4079 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4080 return status;
4081 }
4082
4083 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4084 struct timespec *time)
4085 {
4086 int status = 0;
4087
4088 time->tv_sec = 0;
4089 time->tv_nsec = 0;
4090 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4091 return -EIO;
4092 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4093 status = decode_attr_time(xdr, time);
4094 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4095 }
4096 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4097 (long)time->tv_nsec);
4098 return status;
4099 }
4100
4101 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4102 struct nfs4_label *label)
4103 {
4104 uint32_t pi = 0;
4105 uint32_t lfs = 0;
4106 __u32 len;
4107 __be32 *p;
4108 int status = 0;
4109
4110 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4111 return -EIO;
4112 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4113 p = xdr_inline_decode(xdr, 4);
4114 if (unlikely(!p))
4115 goto out_overflow;
4116 lfs = be32_to_cpup(p++);
4117 p = xdr_inline_decode(xdr, 4);
4118 if (unlikely(!p))
4119 goto out_overflow;
4120 pi = be32_to_cpup(p++);
4121 p = xdr_inline_decode(xdr, 4);
4122 if (unlikely(!p))
4123 goto out_overflow;
4124 len = be32_to_cpup(p++);
4125 p = xdr_inline_decode(xdr, len);
4126 if (unlikely(!p))
4127 goto out_overflow;
4128 if (len < NFS4_MAXLABELLEN) {
4129 if (label) {
4130 memcpy(label->label, p, len);
4131 label->len = len;
4132 label->pi = pi;
4133 label->lfs = lfs;
4134 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4135 }
4136 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4137 } else
4138 printk(KERN_WARNING "%s: label too long (%u)!\n",
4139 __func__, len);
4140 }
4141 if (label && label->label)
4142 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4143 (char *)label->label, label->len, label->pi, label->lfs);
4144 return status;
4145
4146 out_overflow:
4147 print_overflow_msg(__func__, xdr);
4148 return -EIO;
4149 }
4150
4151 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4152 {
4153 int status = 0;
4154
4155 time->tv_sec = 0;
4156 time->tv_nsec = 0;
4157 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4158 return -EIO;
4159 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4160 status = decode_attr_time(xdr, time);
4161 if (status == 0)
4162 status = NFS_ATTR_FATTR_MTIME;
4163 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4164 }
4165 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4166 return status;
4167 }
4168
4169 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4170 {
4171 unsigned int attrwords = XDR_QUADLEN(attrlen);
4172 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4173
4174 if (unlikely(attrwords != nwords)) {
4175 dprintk("%s: server returned incorrect attribute length: "
4176 "%u %c %u\n",
4177 __func__,
4178 attrwords << 2,
4179 (attrwords < nwords) ? '<' : '>',
4180 nwords << 2);
4181 return -EIO;
4182 }
4183 return 0;
4184 }
4185
4186 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4187 {
4188 __be32 *p;
4189
4190 p = xdr_inline_decode(xdr, 20);
4191 if (unlikely(!p))
4192 goto out_overflow;
4193 cinfo->atomic = be32_to_cpup(p++);
4194 p = xdr_decode_hyper(p, &cinfo->before);
4195 xdr_decode_hyper(p, &cinfo->after);
4196 return 0;
4197 out_overflow:
4198 print_overflow_msg(__func__, xdr);
4199 return -EIO;
4200 }
4201
4202 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4203 {
4204 __be32 *p;
4205 uint32_t supp, acc;
4206 int status;
4207
4208 status = decode_op_hdr(xdr, OP_ACCESS);
4209 if (status)
4210 return status;
4211 p = xdr_inline_decode(xdr, 8);
4212 if (unlikely(!p))
4213 goto out_overflow;
4214 supp = be32_to_cpup(p++);
4215 acc = be32_to_cpup(p);
4216 *supported = supp;
4217 *access = acc;
4218 return 0;
4219 out_overflow:
4220 print_overflow_msg(__func__, xdr);
4221 return -EIO;
4222 }
4223
4224 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4225 {
4226 __be32 *p;
4227
4228 p = xdr_inline_decode(xdr, len);
4229 if (likely(p)) {
4230 memcpy(buf, p, len);
4231 return 0;
4232 }
4233 print_overflow_msg(__func__, xdr);
4234 return -EIO;
4235 }
4236
4237 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4238 {
4239 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4240 }
4241
4242 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4243 {
4244 int status;
4245
4246 status = decode_op_hdr(xdr, OP_CLOSE);
4247 if (status != -EIO)
4248 nfs_increment_open_seqid(status, res->seqid);
4249 if (!status)
4250 status = decode_stateid(xdr, &res->stateid);
4251 return status;
4252 }
4253
4254 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4255 {
4256 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4257 }
4258
4259 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4260 {
4261 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4262 }
4263
4264 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4265 {
4266 int status;
4267
4268 status = decode_op_hdr(xdr, OP_COMMIT);
4269 if (!status)
4270 status = decode_write_verifier(xdr, &res->verf->verifier);
4271 return status;
4272 }
4273
4274 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4275 {
4276 __be32 *p;
4277 uint32_t bmlen;
4278 int status;
4279
4280 status = decode_op_hdr(xdr, OP_CREATE);
4281 if (status)
4282 return status;
4283 if ((status = decode_change_info(xdr, cinfo)))
4284 return status;
4285 p = xdr_inline_decode(xdr, 4);
4286 if (unlikely(!p))
4287 goto out_overflow;
4288 bmlen = be32_to_cpup(p);
4289 p = xdr_inline_decode(xdr, bmlen << 2);
4290 if (likely(p))
4291 return 0;
4292 out_overflow:
4293 print_overflow_msg(__func__, xdr);
4294 return -EIO;
4295 }
4296
4297 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4298 {
4299 unsigned int savep;
4300 uint32_t attrlen, bitmap[3] = {0};
4301 int status;
4302
4303 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4304 goto xdr_error;
4305 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4306 goto xdr_error;
4307 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4308 goto xdr_error;
4309 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4310 goto xdr_error;
4311 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4312 &res->fh_expire_type)) != 0)
4313 goto xdr_error;
4314 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4315 goto xdr_error;
4316 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4317 goto xdr_error;
4318 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4319 goto xdr_error;
4320 status = verify_attr_len(xdr, savep, attrlen);
4321 xdr_error:
4322 dprintk("%s: xdr returned %d!\n", __func__, -status);
4323 return status;
4324 }
4325
4326 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4327 {
4328 unsigned int savep;
4329 uint32_t attrlen, bitmap[3] = {0};
4330 int status;
4331
4332 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4333 goto xdr_error;
4334 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4335 goto xdr_error;
4336 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4337 goto xdr_error;
4338
4339 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4340 goto xdr_error;
4341 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4342 goto xdr_error;
4343 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4344 goto xdr_error;
4345 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4346 goto xdr_error;
4347 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4348 goto xdr_error;
4349 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4350 goto xdr_error;
4351
4352 status = verify_attr_len(xdr, savep, attrlen);
4353 xdr_error:
4354 dprintk("%s: xdr returned %d!\n", __func__, -status);
4355 return status;
4356 }
4357
4358 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4359 {
4360 unsigned int savep;
4361 uint32_t attrlen, bitmap[3] = {0};
4362 int status;
4363
4364 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4365 goto xdr_error;
4366 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4369 goto xdr_error;
4370
4371 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4372 goto xdr_error;
4373 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4374 goto xdr_error;
4375
4376 status = verify_attr_len(xdr, savep, attrlen);
4377 xdr_error:
4378 dprintk("%s: xdr returned %d!\n", __func__, -status);
4379 return status;
4380 }
4381
4382 static int decode_threshold_hint(struct xdr_stream *xdr,
4383 uint32_t *bitmap,
4384 uint64_t *res,
4385 uint32_t hint_bit)
4386 {
4387 __be32 *p;
4388
4389 *res = 0;
4390 if (likely(bitmap[0] & hint_bit)) {
4391 p = xdr_inline_decode(xdr, 8);
4392 if (unlikely(!p))
4393 goto out_overflow;
4394 xdr_decode_hyper(p, res);
4395 }
4396 return 0;
4397 out_overflow:
4398 print_overflow_msg(__func__, xdr);
4399 return -EIO;
4400 }
4401
4402 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4403 struct nfs4_threshold *res)
4404 {
4405 __be32 *p;
4406 unsigned int savep;
4407 uint32_t bitmap[3] = {0,}, attrlen;
4408 int status;
4409
4410 /* layout type */
4411 p = xdr_inline_decode(xdr, 4);
4412 if (unlikely(!p)) {
4413 print_overflow_msg(__func__, xdr);
4414 return -EIO;
4415 }
4416 res->l_type = be32_to_cpup(p);
4417
4418 /* thi_hintset bitmap */
4419 status = decode_attr_bitmap(xdr, bitmap);
4420 if (status < 0)
4421 goto xdr_error;
4422
4423 /* thi_hintlist length */
4424 status = decode_attr_length(xdr, &attrlen, &savep);
4425 if (status < 0)
4426 goto xdr_error;
4427 /* thi_hintlist */
4428 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4429 if (status < 0)
4430 goto xdr_error;
4431 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4432 if (status < 0)
4433 goto xdr_error;
4434 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4435 THRESHOLD_RD_IO);
4436 if (status < 0)
4437 goto xdr_error;
4438 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4439 THRESHOLD_WR_IO);
4440 if (status < 0)
4441 goto xdr_error;
4442
4443 status = verify_attr_len(xdr, savep, attrlen);
4444 res->bm = bitmap[0];
4445
4446 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4447 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4448 res->wr_io_sz);
4449 xdr_error:
4450 dprintk("%s ret=%d!\n", __func__, status);
4451 return status;
4452 }
4453
4454 /*
4455 * Thresholds on pNFS direct I/O vrs MDS I/O
4456 */
4457 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4458 uint32_t *bitmap,
4459 struct nfs4_threshold *res)
4460 {
4461 __be32 *p;
4462 int status = 0;
4463 uint32_t num;
4464
4465 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4466 return -EIO;
4467 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4468 /* Did the server return an unrequested attribute? */
4469 if (unlikely(res == NULL))
4470 return -EREMOTEIO;
4471 p = xdr_inline_decode(xdr, 4);
4472 if (unlikely(!p))
4473 goto out_overflow;
4474 num = be32_to_cpup(p);
4475 if (num == 0)
4476 return 0;
4477 if (num > 1)
4478 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4479 "drivers per filesystem not supported\n",
4480 __func__);
4481
4482 status = decode_first_threshold_item4(xdr, res);
4483 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4484 }
4485 return status;
4486 out_overflow:
4487 print_overflow_msg(__func__, xdr);
4488 return -EIO;
4489 }
4490
4491 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4492 struct nfs_fattr *fattr, struct nfs_fh *fh,
4493 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4494 const struct nfs_server *server)
4495 {
4496 int status;
4497 umode_t fmode = 0;
4498 uint32_t type;
4499 int32_t err;
4500
4501 status = decode_attr_type(xdr, bitmap, &type);
4502 if (status < 0)
4503 goto xdr_error;
4504 fattr->mode = 0;
4505 if (status != 0) {
4506 fattr->mode |= nfs_type2fmt[type];
4507 fattr->valid |= status;
4508 }
4509
4510 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4511 if (status < 0)
4512 goto xdr_error;
4513 fattr->valid |= status;
4514
4515 status = decode_attr_size(xdr, bitmap, &fattr->size);
4516 if (status < 0)
4517 goto xdr_error;
4518 fattr->valid |= status;
4519
4520 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4521 if (status < 0)
4522 goto xdr_error;
4523 fattr->valid |= status;
4524
4525 err = 0;
4526 status = decode_attr_error(xdr, bitmap, &err);
4527 if (status < 0)
4528 goto xdr_error;
4529
4530 status = decode_attr_filehandle(xdr, bitmap, fh);
4531 if (status < 0)
4532 goto xdr_error;
4533
4534 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4535 if (status < 0)
4536 goto xdr_error;
4537 fattr->valid |= status;
4538
4539 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4540 if (status < 0)
4541 goto xdr_error;
4542 fattr->valid |= status;
4543
4544 status = decode_attr_mode(xdr, bitmap, &fmode);
4545 if (status < 0)
4546 goto xdr_error;
4547 if (status != 0) {
4548 fattr->mode |= fmode;
4549 fattr->valid |= status;
4550 }
4551
4552 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4553 if (status < 0)
4554 goto xdr_error;
4555 fattr->valid |= status;
4556
4557 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4558 if (status < 0)
4559 goto xdr_error;
4560 fattr->valid |= status;
4561
4562 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4563 if (status < 0)
4564 goto xdr_error;
4565 fattr->valid |= status;
4566
4567 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4568 if (status < 0)
4569 goto xdr_error;
4570 fattr->valid |= status;
4571
4572 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4573 if (status < 0)
4574 goto xdr_error;
4575 fattr->valid |= status;
4576
4577 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4578 if (status < 0)
4579 goto xdr_error;
4580 fattr->valid |= status;
4581
4582 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4583 if (status < 0)
4584 goto xdr_error;
4585 fattr->valid |= status;
4586
4587 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4588 if (status < 0)
4589 goto xdr_error;
4590 fattr->valid |= status;
4591
4592 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4593 if (status < 0)
4594 goto xdr_error;
4595 fattr->valid |= status;
4596
4597 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4598 if (status < 0)
4599 goto xdr_error;
4600
4601 if (label) {
4602 status = decode_attr_security_label(xdr, bitmap, label);
4603 if (status < 0)
4604 goto xdr_error;
4605 fattr->valid |= status;
4606 }
4607
4608 xdr_error:
4609 dprintk("%s: xdr returned %d\n", __func__, -status);
4610 return status;
4611 }
4612
4613 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4614 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4615 struct nfs4_label *label, const struct nfs_server *server)
4616 {
4617 unsigned int savep;
4618 uint32_t attrlen,
4619 bitmap[3] = {0};
4620 int status;
4621
4622 status = decode_op_hdr(xdr, OP_GETATTR);
4623 if (status < 0)
4624 goto xdr_error;
4625
4626 status = decode_attr_bitmap(xdr, bitmap);
4627 if (status < 0)
4628 goto xdr_error;
4629
4630 status = decode_attr_length(xdr, &attrlen, &savep);
4631 if (status < 0)
4632 goto xdr_error;
4633
4634 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4635 label, server);
4636 if (status < 0)
4637 goto xdr_error;
4638
4639 status = verify_attr_len(xdr, savep, attrlen);
4640 xdr_error:
4641 dprintk("%s: xdr returned %d\n", __func__, -status);
4642 return status;
4643 }
4644
4645 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4646 struct nfs4_label *label, const struct nfs_server *server)
4647 {
4648 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4649 }
4650
4651 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4652 const struct nfs_server *server)
4653 {
4654 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4655 }
4656
4657 /*
4658 * Decode potentially multiple layout types. Currently we only support
4659 * one layout driver per file system.
4660 */
4661 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4662 uint32_t *layouttype)
4663 {
4664 __be32 *p;
4665 int num;
4666
4667 p = xdr_inline_decode(xdr, 4);
4668 if (unlikely(!p))
4669 goto out_overflow;
4670 num = be32_to_cpup(p);
4671
4672 /* pNFS is not supported by the underlying file system */
4673 if (num == 0) {
4674 *layouttype = 0;
4675 return 0;
4676 }
4677 if (num > 1)
4678 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4679 "drivers per filesystem not supported\n", __func__);
4680
4681 /* Decode and set first layout type, move xdr->p past unused types */
4682 p = xdr_inline_decode(xdr, num * 4);
4683 if (unlikely(!p))
4684 goto out_overflow;
4685 *layouttype = be32_to_cpup(p);
4686 return 0;
4687 out_overflow:
4688 print_overflow_msg(__func__, xdr);
4689 return -EIO;
4690 }
4691
4692 /*
4693 * The type of file system exported.
4694 * Note we must ensure that layouttype is set in any non-error case.
4695 */
4696 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4697 uint32_t *layouttype)
4698 {
4699 int status = 0;
4700
4701 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4702 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4703 return -EIO;
4704 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4705 status = decode_first_pnfs_layout_type(xdr, layouttype);
4706 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4707 } else
4708 *layouttype = 0;
4709 return status;
4710 }
4711
4712 /*
4713 * The prefered block size for layout directed io
4714 */
4715 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4716 uint32_t *res)
4717 {
4718 __be32 *p;
4719
4720 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4721 *res = 0;
4722 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4723 p = xdr_inline_decode(xdr, 4);
4724 if (unlikely(!p)) {
4725 print_overflow_msg(__func__, xdr);
4726 return -EIO;
4727 }
4728 *res = be32_to_cpup(p);
4729 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4730 }
4731 return 0;
4732 }
4733
4734 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4735 {
4736 unsigned int savep;
4737 uint32_t attrlen, bitmap[3];
4738 int status;
4739
4740 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4741 goto xdr_error;
4742 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4743 goto xdr_error;
4744 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4745 goto xdr_error;
4746
4747 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4748
4749 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4750 goto xdr_error;
4751 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4752 goto xdr_error;
4753 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4754 goto xdr_error;
4755 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4756 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4757 goto xdr_error;
4758 fsinfo->wtpref = fsinfo->wtmax;
4759 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4760 if (status != 0)
4761 goto xdr_error;
4762 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4763 if (status != 0)
4764 goto xdr_error;
4765 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4766 if (status)
4767 goto xdr_error;
4768
4769 status = verify_attr_len(xdr, savep, attrlen);
4770 xdr_error:
4771 dprintk("%s: xdr returned %d!\n", __func__, -status);
4772 return status;
4773 }
4774
4775 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4776 {
4777 __be32 *p;
4778 uint32_t len;
4779 int status;
4780
4781 /* Zero handle first to allow comparisons */
4782 memset(fh, 0, sizeof(*fh));
4783
4784 status = decode_op_hdr(xdr, OP_GETFH);
4785 if (status)
4786 return status;
4787
4788 p = xdr_inline_decode(xdr, 4);
4789 if (unlikely(!p))
4790 goto out_overflow;
4791 len = be32_to_cpup(p);
4792 if (len > NFS4_FHSIZE)
4793 return -EIO;
4794 fh->size = len;
4795 p = xdr_inline_decode(xdr, len);
4796 if (unlikely(!p))
4797 goto out_overflow;
4798 memcpy(fh->data, p, len);
4799 return 0;
4800 out_overflow:
4801 print_overflow_msg(__func__, xdr);
4802 return -EIO;
4803 }
4804
4805 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4806 {
4807 int status;
4808
4809 status = decode_op_hdr(xdr, OP_LINK);
4810 if (status)
4811 return status;
4812 return decode_change_info(xdr, cinfo);
4813 }
4814
4815 /*
4816 * We create the owner, so we know a proper owner.id length is 4.
4817 */
4818 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4819 {
4820 uint64_t offset, length, clientid;
4821 __be32 *p;
4822 uint32_t namelen, type;
4823
4824 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4825 if (unlikely(!p))
4826 goto out_overflow;
4827 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4828 p = xdr_decode_hyper(p, &length);
4829 type = be32_to_cpup(p++); /* 4 byte read */
4830 if (fl != NULL) { /* manipulate file lock */
4831 fl->fl_start = (loff_t)offset;
4832 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4833 if (length == ~(uint64_t)0)
4834 fl->fl_end = OFFSET_MAX;
4835 fl->fl_type = F_WRLCK;
4836 if (type & 1)
4837 fl->fl_type = F_RDLCK;
4838 fl->fl_pid = 0;
4839 }
4840 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4841 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4842 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4843 if (likely(p))
4844 return -NFS4ERR_DENIED;
4845 out_overflow:
4846 print_overflow_msg(__func__, xdr);
4847 return -EIO;
4848 }
4849
4850 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4851 {
4852 int status;
4853
4854 status = decode_op_hdr(xdr, OP_LOCK);
4855 if (status == -EIO)
4856 goto out;
4857 if (status == 0) {
4858 status = decode_stateid(xdr, &res->stateid);
4859 if (unlikely(status))
4860 goto out;
4861 } else if (status == -NFS4ERR_DENIED)
4862 status = decode_lock_denied(xdr, NULL);
4863 if (res->open_seqid != NULL)
4864 nfs_increment_open_seqid(status, res->open_seqid);
4865 nfs_increment_lock_seqid(status, res->lock_seqid);
4866 out:
4867 return status;
4868 }
4869
4870 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4871 {
4872 int status;
4873 status = decode_op_hdr(xdr, OP_LOCKT);
4874 if (status == -NFS4ERR_DENIED)
4875 return decode_lock_denied(xdr, res->denied);
4876 return status;
4877 }
4878
4879 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4880 {
4881 int status;
4882
4883 status = decode_op_hdr(xdr, OP_LOCKU);
4884 if (status != -EIO)
4885 nfs_increment_lock_seqid(status, res->seqid);
4886 if (status == 0)
4887 status = decode_stateid(xdr, &res->stateid);
4888 return status;
4889 }
4890
4891 static int decode_release_lockowner(struct xdr_stream *xdr)
4892 {
4893 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4894 }
4895
4896 static int decode_lookup(struct xdr_stream *xdr)
4897 {
4898 return decode_op_hdr(xdr, OP_LOOKUP);
4899 }
4900
4901 /* This is too sick! */
4902 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4903 {
4904 __be32 *p;
4905 uint32_t limit_type, nblocks, blocksize;
4906
4907 p = xdr_inline_decode(xdr, 12);
4908 if (unlikely(!p))
4909 goto out_overflow;
4910 limit_type = be32_to_cpup(p++);
4911 switch (limit_type) {
4912 case 1:
4913 xdr_decode_hyper(p, maxsize);
4914 break;
4915 case 2:
4916 nblocks = be32_to_cpup(p++);
4917 blocksize = be32_to_cpup(p);
4918 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4919 }
4920 return 0;
4921 out_overflow:
4922 print_overflow_msg(__func__, xdr);
4923 return -EIO;
4924 }
4925
4926 static int decode_rw_delegation(struct xdr_stream *xdr,
4927 uint32_t delegation_type,
4928 struct nfs_openres *res)
4929 {
4930 __be32 *p;
4931 int status;
4932
4933 status = decode_stateid(xdr, &res->delegation);
4934 if (unlikely(status))
4935 return status;
4936 p = xdr_inline_decode(xdr, 4);
4937 if (unlikely(!p))
4938 goto out_overflow;
4939 res->do_recall = be32_to_cpup(p);
4940
4941 switch (delegation_type) {
4942 case NFS4_OPEN_DELEGATE_READ:
4943 res->delegation_type = FMODE_READ;
4944 break;
4945 case NFS4_OPEN_DELEGATE_WRITE:
4946 res->delegation_type = FMODE_WRITE|FMODE_READ;
4947 if (decode_space_limit(xdr, &res->maxsize) < 0)
4948 return -EIO;
4949 }
4950 return decode_ace(xdr, NULL, res->server->nfs_client);
4951 out_overflow:
4952 print_overflow_msg(__func__, xdr);
4953 return -EIO;
4954 }
4955
4956 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4957 {
4958 __be32 *p;
4959 uint32_t why_no_delegation;
4960
4961 p = xdr_inline_decode(xdr, 4);
4962 if (unlikely(!p))
4963 goto out_overflow;
4964 why_no_delegation = be32_to_cpup(p);
4965 switch (why_no_delegation) {
4966 case WND4_CONTENTION:
4967 case WND4_RESOURCE:
4968 xdr_inline_decode(xdr, 4);
4969 /* Ignore for now */
4970 }
4971 return 0;
4972 out_overflow:
4973 print_overflow_msg(__func__, xdr);
4974 return -EIO;
4975 }
4976
4977 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4978 {
4979 __be32 *p;
4980 uint32_t delegation_type;
4981
4982 p = xdr_inline_decode(xdr, 4);
4983 if (unlikely(!p))
4984 goto out_overflow;
4985 delegation_type = be32_to_cpup(p);
4986 res->delegation_type = 0;
4987 switch (delegation_type) {
4988 case NFS4_OPEN_DELEGATE_NONE:
4989 return 0;
4990 case NFS4_OPEN_DELEGATE_READ:
4991 case NFS4_OPEN_DELEGATE_WRITE:
4992 return decode_rw_delegation(xdr, delegation_type, res);
4993 case NFS4_OPEN_DELEGATE_NONE_EXT:
4994 return decode_no_delegation(xdr, res);
4995 }
4996 return -EIO;
4997 out_overflow:
4998 print_overflow_msg(__func__, xdr);
4999 return -EIO;
5000 }
5001
5002 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5003 {
5004 __be32 *p;
5005 uint32_t savewords, bmlen, i;
5006 int status;
5007
5008 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5009 return status;
5010 nfs_increment_open_seqid(status, res->seqid);
5011 if (status)
5012 return status;
5013 status = decode_stateid(xdr, &res->stateid);
5014 if (unlikely(status))
5015 return status;
5016
5017 decode_change_info(xdr, &res->cinfo);
5018
5019 p = xdr_inline_decode(xdr, 8);
5020 if (unlikely(!p))
5021 goto out_overflow;
5022 res->rflags = be32_to_cpup(p++);
5023 bmlen = be32_to_cpup(p);
5024 if (bmlen > 10)
5025 goto xdr_error;
5026
5027 p = xdr_inline_decode(xdr, bmlen << 2);
5028 if (unlikely(!p))
5029 goto out_overflow;
5030 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5031 for (i = 0; i < savewords; ++i)
5032 res->attrset[i] = be32_to_cpup(p++);
5033 for (; i < NFS4_BITMAP_SIZE; i++)
5034 res->attrset[i] = 0;
5035
5036 return decode_delegation(xdr, res);
5037 xdr_error:
5038 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5039 return -EIO;
5040 out_overflow:
5041 print_overflow_msg(__func__, xdr);
5042 return -EIO;
5043 }
5044
5045 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5046 {
5047 int status;
5048
5049 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5050 if (status != -EIO)
5051 nfs_increment_open_seqid(status, res->seqid);
5052 if (!status)
5053 status = decode_stateid(xdr, &res->stateid);
5054 return status;
5055 }
5056
5057 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5058 {
5059 int status;
5060
5061 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5062 if (status != -EIO)
5063 nfs_increment_open_seqid(status, res->seqid);
5064 if (!status)
5065 status = decode_stateid(xdr, &res->stateid);
5066 return status;
5067 }
5068
5069 static int decode_putfh(struct xdr_stream *xdr)
5070 {
5071 return decode_op_hdr(xdr, OP_PUTFH);
5072 }
5073
5074 static int decode_putrootfh(struct xdr_stream *xdr)
5075 {
5076 return decode_op_hdr(xdr, OP_PUTROOTFH);
5077 }
5078
5079 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5080 struct nfs_pgio_res *res)
5081 {
5082 __be32 *p;
5083 uint32_t count, eof, recvd;
5084 int status;
5085
5086 status = decode_op_hdr(xdr, OP_READ);
5087 if (status)
5088 return status;
5089 p = xdr_inline_decode(xdr, 8);
5090 if (unlikely(!p))
5091 goto out_overflow;
5092 eof = be32_to_cpup(p++);
5093 count = be32_to_cpup(p);
5094 recvd = xdr_read_pages(xdr, count);
5095 if (count > recvd) {
5096 dprintk("NFS: server cheating in read reply: "
5097 "count %u > recvd %u\n", count, recvd);
5098 count = recvd;
5099 eof = 0;
5100 }
5101 res->eof = eof;
5102 res->count = count;
5103 return 0;
5104 out_overflow:
5105 print_overflow_msg(__func__, xdr);
5106 return -EIO;
5107 }
5108
5109 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5110 {
5111 int status;
5112 __be32 verf[2];
5113
5114 status = decode_op_hdr(xdr, OP_READDIR);
5115 if (!status)
5116 status = decode_verifier(xdr, readdir->verifier.data);
5117 if (unlikely(status))
5118 return status;
5119 memcpy(verf, readdir->verifier.data, sizeof(verf));
5120 dprintk("%s: verifier = %08x:%08x\n",
5121 __func__, verf[0], verf[1]);
5122 return xdr_read_pages(xdr, xdr->buf->page_len);
5123 }
5124
5125 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5126 {
5127 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5128 u32 len, recvd;
5129 __be32 *p;
5130 int status;
5131
5132 status = decode_op_hdr(xdr, OP_READLINK);
5133 if (status)
5134 return status;
5135
5136 /* Convert length of symlink */
5137 p = xdr_inline_decode(xdr, 4);
5138 if (unlikely(!p))
5139 goto out_overflow;
5140 len = be32_to_cpup(p);
5141 if (len >= rcvbuf->page_len || len <= 0) {
5142 dprintk("nfs: server returned giant symlink!\n");
5143 return -ENAMETOOLONG;
5144 }
5145 recvd = xdr_read_pages(xdr, len);
5146 if (recvd < len) {
5147 dprintk("NFS: server cheating in readlink reply: "
5148 "count %u > recvd %u\n", len, recvd);
5149 return -EIO;
5150 }
5151 /*
5152 * The XDR encode routine has set things up so that
5153 * the link text will be copied directly into the
5154 * buffer. We just have to do overflow-checking,
5155 * and and null-terminate the text (the VFS expects
5156 * null-termination).
5157 */
5158 xdr_terminate_string(rcvbuf, len);
5159 return 0;
5160 out_overflow:
5161 print_overflow_msg(__func__, xdr);
5162 return -EIO;
5163 }
5164
5165 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5166 {
5167 int status;
5168
5169 status = decode_op_hdr(xdr, OP_REMOVE);
5170 if (status)
5171 goto out;
5172 status = decode_change_info(xdr, cinfo);
5173 out:
5174 return status;
5175 }
5176
5177 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5178 struct nfs4_change_info *new_cinfo)
5179 {
5180 int status;
5181
5182 status = decode_op_hdr(xdr, OP_RENAME);
5183 if (status)
5184 goto out;
5185 if ((status = decode_change_info(xdr, old_cinfo)))
5186 goto out;
5187 status = decode_change_info(xdr, new_cinfo);
5188 out:
5189 return status;
5190 }
5191
5192 static int decode_renew(struct xdr_stream *xdr)
5193 {
5194 return decode_op_hdr(xdr, OP_RENEW);
5195 }
5196
5197 static int
5198 decode_restorefh(struct xdr_stream *xdr)
5199 {
5200 return decode_op_hdr(xdr, OP_RESTOREFH);
5201 }
5202
5203 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5204 struct nfs_getaclres *res)
5205 {
5206 unsigned int savep;
5207 uint32_t attrlen,
5208 bitmap[3] = {0};
5209 int status;
5210 unsigned int pg_offset;
5211
5212 res->acl_len = 0;
5213 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5214 goto out;
5215
5216 xdr_enter_page(xdr, xdr->buf->page_len);
5217
5218 /* Calculate the offset of the page data */
5219 pg_offset = xdr->buf->head[0].iov_len;
5220
5221 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5222 goto out;
5223 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5224 goto out;
5225
5226 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5227 return -EIO;
5228 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5229
5230 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5231 * are stored with the acl data to handle the problem of
5232 * variable length bitmaps.*/
5233 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5234 res->acl_len = attrlen;
5235
5236 /* Check for receive buffer overflow */
5237 if (res->acl_len > (xdr->nwords << 2) ||
5238 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5239 res->acl_flags |= NFS4_ACL_TRUNC;
5240 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5241 attrlen, xdr->nwords << 2);
5242 }
5243 } else
5244 status = -EOPNOTSUPP;
5245
5246 out:
5247 return status;
5248 }
5249
5250 static int
5251 decode_savefh(struct xdr_stream *xdr)
5252 {
5253 return decode_op_hdr(xdr, OP_SAVEFH);
5254 }
5255
5256 static int decode_setattr(struct xdr_stream *xdr)
5257 {
5258 __be32 *p;
5259 uint32_t bmlen;
5260 int status;
5261
5262 status = decode_op_hdr(xdr, OP_SETATTR);
5263 if (status)
5264 return status;
5265 p = xdr_inline_decode(xdr, 4);
5266 if (unlikely(!p))
5267 goto out_overflow;
5268 bmlen = be32_to_cpup(p);
5269 p = xdr_inline_decode(xdr, bmlen << 2);
5270 if (likely(p))
5271 return 0;
5272 out_overflow:
5273 print_overflow_msg(__func__, xdr);
5274 return -EIO;
5275 }
5276
5277 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5278 {
5279 __be32 *p;
5280 uint32_t opnum;
5281 int32_t nfserr;
5282
5283 p = xdr_inline_decode(xdr, 8);
5284 if (unlikely(!p))
5285 goto out_overflow;
5286 opnum = be32_to_cpup(p++);
5287 if (opnum != OP_SETCLIENTID) {
5288 dprintk("nfs: decode_setclientid: Server returned operation"
5289 " %d\n", opnum);
5290 return -EIO;
5291 }
5292 nfserr = be32_to_cpup(p);
5293 if (nfserr == NFS_OK) {
5294 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5295 if (unlikely(!p))
5296 goto out_overflow;
5297 p = xdr_decode_hyper(p, &res->clientid);
5298 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5299 } else if (nfserr == NFSERR_CLID_INUSE) {
5300 uint32_t len;
5301
5302 /* skip netid string */
5303 p = xdr_inline_decode(xdr, 4);
5304 if (unlikely(!p))
5305 goto out_overflow;
5306 len = be32_to_cpup(p);
5307 p = xdr_inline_decode(xdr, len);
5308 if (unlikely(!p))
5309 goto out_overflow;
5310
5311 /* skip uaddr string */
5312 p = xdr_inline_decode(xdr, 4);
5313 if (unlikely(!p))
5314 goto out_overflow;
5315 len = be32_to_cpup(p);
5316 p = xdr_inline_decode(xdr, len);
5317 if (unlikely(!p))
5318 goto out_overflow;
5319 return -NFSERR_CLID_INUSE;
5320 } else
5321 return nfs4_stat_to_errno(nfserr);
5322
5323 return 0;
5324 out_overflow:
5325 print_overflow_msg(__func__, xdr);
5326 return -EIO;
5327 }
5328
5329 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5330 {
5331 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5332 }
5333
5334 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5335 {
5336 __be32 *p;
5337 int status;
5338
5339 status = decode_op_hdr(xdr, OP_WRITE);
5340 if (status)
5341 return status;
5342
5343 p = xdr_inline_decode(xdr, 8);
5344 if (unlikely(!p))
5345 goto out_overflow;
5346 res->count = be32_to_cpup(p++);
5347 res->verf->committed = be32_to_cpup(p++);
5348 return decode_write_verifier(xdr, &res->verf->verifier);
5349 out_overflow:
5350 print_overflow_msg(__func__, xdr);
5351 return -EIO;
5352 }
5353
5354 static int decode_delegreturn(struct xdr_stream *xdr)
5355 {
5356 return decode_op_hdr(xdr, OP_DELEGRETURN);
5357 }
5358
5359 static int decode_secinfo_gss(struct xdr_stream *xdr,
5360 struct nfs4_secinfo4 *flavor)
5361 {
5362 u32 oid_len;
5363 __be32 *p;
5364
5365 p = xdr_inline_decode(xdr, 4);
5366 if (unlikely(!p))
5367 goto out_overflow;
5368 oid_len = be32_to_cpup(p);
5369 if (oid_len > GSS_OID_MAX_LEN)
5370 goto out_err;
5371
5372 p = xdr_inline_decode(xdr, oid_len);
5373 if (unlikely(!p))
5374 goto out_overflow;
5375 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5376 flavor->flavor_info.oid.len = oid_len;
5377
5378 p = xdr_inline_decode(xdr, 8);
5379 if (unlikely(!p))
5380 goto out_overflow;
5381 flavor->flavor_info.qop = be32_to_cpup(p++);
5382 flavor->flavor_info.service = be32_to_cpup(p);
5383
5384 return 0;
5385
5386 out_overflow:
5387 print_overflow_msg(__func__, xdr);
5388 return -EIO;
5389 out_err:
5390 return -EINVAL;
5391 }
5392
5393 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5394 {
5395 struct nfs4_secinfo4 *sec_flavor;
5396 unsigned int i, num_flavors;
5397 int status;
5398 __be32 *p;
5399
5400 p = xdr_inline_decode(xdr, 4);
5401 if (unlikely(!p))
5402 goto out_overflow;
5403
5404 res->flavors->num_flavors = 0;
5405 num_flavors = be32_to_cpup(p);
5406
5407 for (i = 0; i < num_flavors; i++) {
5408 sec_flavor = &res->flavors->flavors[i];
5409 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5410 break;
5411
5412 p = xdr_inline_decode(xdr, 4);
5413 if (unlikely(!p))
5414 goto out_overflow;
5415 sec_flavor->flavor = be32_to_cpup(p);
5416
5417 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5418 status = decode_secinfo_gss(xdr, sec_flavor);
5419 if (status)
5420 goto out;
5421 }
5422 res->flavors->num_flavors++;
5423 }
5424
5425 status = 0;
5426 out:
5427 return status;
5428 out_overflow:
5429 print_overflow_msg(__func__, xdr);
5430 return -EIO;
5431 }
5432
5433 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5434 {
5435 int status = decode_op_hdr(xdr, OP_SECINFO);
5436 if (status)
5437 return status;
5438 return decode_secinfo_common(xdr, res);
5439 }
5440
5441 #if defined(CONFIG_NFS_V4_1)
5442 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5443 {
5444 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5445 if (status)
5446 return status;
5447 return decode_secinfo_common(xdr, res);
5448 }
5449
5450 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5451 {
5452 __be32 *p;
5453 uint32_t bitmap_words;
5454 unsigned int i;
5455
5456 p = xdr_inline_decode(xdr, 4);
5457 bitmap_words = be32_to_cpup(p++);
5458 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5459 return -EIO;
5460 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5461 for (i = 0; i < bitmap_words; i++)
5462 op_map->u.words[i] = be32_to_cpup(p++);
5463
5464 return 0;
5465 }
5466
5467 static int decode_exchange_id(struct xdr_stream *xdr,
5468 struct nfs41_exchange_id_res *res)
5469 {
5470 __be32 *p;
5471 uint32_t dummy;
5472 char *dummy_str;
5473 int status;
5474 uint32_t impl_id_count;
5475
5476 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5477 if (status)
5478 return status;
5479
5480 p = xdr_inline_decode(xdr, 8);
5481 if (unlikely(!p))
5482 goto out_overflow;
5483 xdr_decode_hyper(p, &res->clientid);
5484 p = xdr_inline_decode(xdr, 12);
5485 if (unlikely(!p))
5486 goto out_overflow;
5487 res->seqid = be32_to_cpup(p++);
5488 res->flags = be32_to_cpup(p++);
5489
5490 res->state_protect.how = be32_to_cpup(p);
5491 switch (res->state_protect.how) {
5492 case SP4_NONE:
5493 break;
5494 case SP4_MACH_CRED:
5495 status = decode_op_map(xdr, &res->state_protect.enforce);
5496 if (status)
5497 return status;
5498 status = decode_op_map(xdr, &res->state_protect.allow);
5499 if (status)
5500 return status;
5501 break;
5502 default:
5503 WARN_ON_ONCE(1);
5504 return -EIO;
5505 }
5506
5507 /* server_owner4.so_minor_id */
5508 p = xdr_inline_decode(xdr, 8);
5509 if (unlikely(!p))
5510 goto out_overflow;
5511 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5512
5513 /* server_owner4.so_major_id */
5514 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5515 if (unlikely(status))
5516 return status;
5517 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5518 return -EIO;
5519 memcpy(res->server_owner->major_id, dummy_str, dummy);
5520 res->server_owner->major_id_sz = dummy;
5521
5522 /* server_scope4 */
5523 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5524 if (unlikely(status))
5525 return status;
5526 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5527 return -EIO;
5528 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5529 res->server_scope->server_scope_sz = dummy;
5530
5531 /* Implementation Id */
5532 p = xdr_inline_decode(xdr, 4);
5533 if (unlikely(!p))
5534 goto out_overflow;
5535 impl_id_count = be32_to_cpup(p++);
5536
5537 if (impl_id_count) {
5538 /* nii_domain */
5539 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5540 if (unlikely(status))
5541 return status;
5542 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5543 return -EIO;
5544 memcpy(res->impl_id->domain, dummy_str, dummy);
5545
5546 /* nii_name */
5547 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5548 if (unlikely(status))
5549 return status;
5550 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5551 return -EIO;
5552 memcpy(res->impl_id->name, dummy_str, dummy);
5553
5554 /* nii_date */
5555 p = xdr_inline_decode(xdr, 12);
5556 if (unlikely(!p))
5557 goto out_overflow;
5558 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5559 res->impl_id->date.nseconds = be32_to_cpup(p);
5560
5561 /* if there's more than one entry, ignore the rest */
5562 }
5563 return 0;
5564 out_overflow:
5565 print_overflow_msg(__func__, xdr);
5566 return -EIO;
5567 }
5568
5569 static int decode_chan_attrs(struct xdr_stream *xdr,
5570 struct nfs4_channel_attrs *attrs)
5571 {
5572 __be32 *p;
5573 u32 nr_attrs, val;
5574
5575 p = xdr_inline_decode(xdr, 28);
5576 if (unlikely(!p))
5577 goto out_overflow;
5578 val = be32_to_cpup(p++); /* headerpadsz */
5579 if (val)
5580 return -EINVAL; /* no support for header padding yet */
5581 attrs->max_rqst_sz = be32_to_cpup(p++);
5582 attrs->max_resp_sz = be32_to_cpup(p++);
5583 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5584 attrs->max_ops = be32_to_cpup(p++);
5585 attrs->max_reqs = be32_to_cpup(p++);
5586 nr_attrs = be32_to_cpup(p);
5587 if (unlikely(nr_attrs > 1)) {
5588 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5589 "count %u\n", __func__, nr_attrs);
5590 return -EINVAL;
5591 }
5592 if (nr_attrs == 1) {
5593 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5594 if (unlikely(!p))
5595 goto out_overflow;
5596 }
5597 return 0;
5598 out_overflow:
5599 print_overflow_msg(__func__, xdr);
5600 return -EIO;
5601 }
5602
5603 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5604 {
5605 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5606 }
5607
5608 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5609 struct nfs41_bind_conn_to_session_res *res)
5610 {
5611 __be32 *p;
5612 int status;
5613
5614 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5615 if (!status)
5616 status = decode_sessionid(xdr, &res->sessionid);
5617 if (unlikely(status))
5618 return status;
5619
5620 /* dir flags, rdma mode bool */
5621 p = xdr_inline_decode(xdr, 8);
5622 if (unlikely(!p))
5623 goto out_overflow;
5624
5625 res->dir = be32_to_cpup(p++);
5626 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5627 return -EIO;
5628 if (be32_to_cpup(p) == 0)
5629 res->use_conn_in_rdma_mode = false;
5630 else
5631 res->use_conn_in_rdma_mode = true;
5632
5633 return 0;
5634 out_overflow:
5635 print_overflow_msg(__func__, xdr);
5636 return -EIO;
5637 }
5638
5639 static int decode_create_session(struct xdr_stream *xdr,
5640 struct nfs41_create_session_res *res)
5641 {
5642 __be32 *p;
5643 int status;
5644
5645 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5646 if (!status)
5647 status = decode_sessionid(xdr, &res->sessionid);
5648 if (unlikely(status))
5649 return status;
5650
5651 /* seqid, flags */
5652 p = xdr_inline_decode(xdr, 8);
5653 if (unlikely(!p))
5654 goto out_overflow;
5655 res->seqid = be32_to_cpup(p++);
5656 res->flags = be32_to_cpup(p);
5657
5658 /* Channel attributes */
5659 status = decode_chan_attrs(xdr, &res->fc_attrs);
5660 if (!status)
5661 status = decode_chan_attrs(xdr, &res->bc_attrs);
5662 return status;
5663 out_overflow:
5664 print_overflow_msg(__func__, xdr);
5665 return -EIO;
5666 }
5667
5668 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5669 {
5670 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5671 }
5672
5673 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5674 {
5675 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5676 }
5677
5678 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5679 {
5680 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5681 }
5682 #endif /* CONFIG_NFS_V4_1 */
5683
5684 static int decode_sequence(struct xdr_stream *xdr,
5685 struct nfs4_sequence_res *res,
5686 struct rpc_rqst *rqstp)
5687 {
5688 #if defined(CONFIG_NFS_V4_1)
5689 struct nfs4_session *session;
5690 struct nfs4_sessionid id;
5691 u32 dummy;
5692 int status;
5693 __be32 *p;
5694
5695 if (res->sr_slot == NULL)
5696 return 0;
5697 if (!res->sr_slot->table->session)
5698 return 0;
5699
5700 status = decode_op_hdr(xdr, OP_SEQUENCE);
5701 if (!status)
5702 status = decode_sessionid(xdr, &id);
5703 if (unlikely(status))
5704 goto out_err;
5705
5706 /*
5707 * If the server returns different values for sessionID, slotID or
5708 * sequence number, the server is looney tunes.
5709 */
5710 status = -EREMOTEIO;
5711 session = res->sr_slot->table->session;
5712
5713 if (memcmp(id.data, session->sess_id.data,
5714 NFS4_MAX_SESSIONID_LEN)) {
5715 dprintk("%s Invalid session id\n", __func__);
5716 goto out_err;
5717 }
5718
5719 p = xdr_inline_decode(xdr, 20);
5720 if (unlikely(!p))
5721 goto out_overflow;
5722
5723 /* seqid */
5724 dummy = be32_to_cpup(p++);
5725 if (dummy != res->sr_slot->seq_nr) {
5726 dprintk("%s Invalid sequence number\n", __func__);
5727 goto out_err;
5728 }
5729 /* slot id */
5730 dummy = be32_to_cpup(p++);
5731 if (dummy != res->sr_slot->slot_nr) {
5732 dprintk("%s Invalid slot id\n", __func__);
5733 goto out_err;
5734 }
5735 /* highest slot id */
5736 res->sr_highest_slotid = be32_to_cpup(p++);
5737 /* target highest slot id */
5738 res->sr_target_highest_slotid = be32_to_cpup(p++);
5739 /* result flags */
5740 res->sr_status_flags = be32_to_cpup(p);
5741 status = 0;
5742 out_err:
5743 res->sr_status = status;
5744 return status;
5745 out_overflow:
5746 print_overflow_msg(__func__, xdr);
5747 status = -EIO;
5748 goto out_err;
5749 #else /* CONFIG_NFS_V4_1 */
5750 return 0;
5751 #endif /* CONFIG_NFS_V4_1 */
5752 }
5753
5754 #if defined(CONFIG_NFS_V4_1)
5755 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5756 struct nfs4_getdeviceinfo_res *res)
5757 {
5758 struct pnfs_device *pdev = res->pdev;
5759 __be32 *p;
5760 uint32_t len, type;
5761 int status;
5762
5763 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5764 if (status) {
5765 if (status == -ETOOSMALL) {
5766 p = xdr_inline_decode(xdr, 4);
5767 if (unlikely(!p))
5768 goto out_overflow;
5769 pdev->mincount = be32_to_cpup(p);
5770 dprintk("%s: Min count too small. mincnt = %u\n",
5771 __func__, pdev->mincount);
5772 }
5773 return status;
5774 }
5775
5776 p = xdr_inline_decode(xdr, 8);
5777 if (unlikely(!p))
5778 goto out_overflow;
5779 type = be32_to_cpup(p++);
5780 if (type != pdev->layout_type) {
5781 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5782 __func__, pdev->layout_type, type);
5783 return -EINVAL;
5784 }
5785 /*
5786 * Get the length of the opaque device_addr4. xdr_read_pages places
5787 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5788 * and places the remaining xdr data in xdr_buf->tail
5789 */
5790 pdev->mincount = be32_to_cpup(p);
5791 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5792 goto out_overflow;
5793
5794 /* Parse notification bitmap, verifying that it is zero. */
5795 p = xdr_inline_decode(xdr, 4);
5796 if (unlikely(!p))
5797 goto out_overflow;
5798 len = be32_to_cpup(p);
5799 if (len) {
5800 uint32_t i;
5801
5802 p = xdr_inline_decode(xdr, 4 * len);
5803 if (unlikely(!p))
5804 goto out_overflow;
5805
5806 res->notification = be32_to_cpup(p++);
5807 for (i = 1; i < len; i++) {
5808 if (be32_to_cpup(p++)) {
5809 dprintk("%s: unsupported notification\n",
5810 __func__);
5811 return -EIO;
5812 }
5813 }
5814 }
5815 return 0;
5816 out_overflow:
5817 print_overflow_msg(__func__, xdr);
5818 return -EIO;
5819 }
5820
5821 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5822 struct nfs4_layoutget_res *res)
5823 {
5824 __be32 *p;
5825 int status;
5826 u32 layout_count;
5827 u32 recvd;
5828
5829 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5830 if (status)
5831 return status;
5832 p = xdr_inline_decode(xdr, 4);
5833 if (unlikely(!p))
5834 goto out_overflow;
5835 res->return_on_close = be32_to_cpup(p);
5836 decode_stateid(xdr, &res->stateid);
5837 p = xdr_inline_decode(xdr, 4);
5838 if (unlikely(!p))
5839 goto out_overflow;
5840 layout_count = be32_to_cpup(p);
5841 if (!layout_count) {
5842 dprintk("%s: server responded with empty layout array\n",
5843 __func__);
5844 return -EINVAL;
5845 }
5846
5847 p = xdr_inline_decode(xdr, 28);
5848 if (unlikely(!p))
5849 goto out_overflow;
5850 p = xdr_decode_hyper(p, &res->range.offset);
5851 p = xdr_decode_hyper(p, &res->range.length);
5852 res->range.iomode = be32_to_cpup(p++);
5853 res->type = be32_to_cpup(p++);
5854 res->layoutp->len = be32_to_cpup(p);
5855
5856 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5857 __func__,
5858 (unsigned long)res->range.offset,
5859 (unsigned long)res->range.length,
5860 res->range.iomode,
5861 res->type,
5862 res->layoutp->len);
5863
5864 recvd = xdr_read_pages(xdr, res->layoutp->len);
5865 if (res->layoutp->len > recvd) {
5866 dprintk("NFS: server cheating in layoutget reply: "
5867 "layout len %u > recvd %u\n",
5868 res->layoutp->len, recvd);
5869 return -EINVAL;
5870 }
5871
5872 if (layout_count > 1) {
5873 /* We only handle a length one array at the moment. Any
5874 * further entries are just ignored. Note that this means
5875 * the client may see a response that is less than the
5876 * minimum it requested.
5877 */
5878 dprintk("%s: server responded with %d layouts, dropping tail\n",
5879 __func__, layout_count);
5880 }
5881
5882 return 0;
5883 out_overflow:
5884 print_overflow_msg(__func__, xdr);
5885 return -EIO;
5886 }
5887
5888 static int decode_layoutreturn(struct xdr_stream *xdr,
5889 struct nfs4_layoutreturn_res *res)
5890 {
5891 __be32 *p;
5892 int status;
5893
5894 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5895 if (status)
5896 return status;
5897 p = xdr_inline_decode(xdr, 4);
5898 if (unlikely(!p))
5899 goto out_overflow;
5900 res->lrs_present = be32_to_cpup(p);
5901 if (res->lrs_present)
5902 status = decode_stateid(xdr, &res->stateid);
5903 return status;
5904 out_overflow:
5905 print_overflow_msg(__func__, xdr);
5906 return -EIO;
5907 }
5908
5909 static int decode_layoutcommit(struct xdr_stream *xdr,
5910 struct rpc_rqst *req,
5911 struct nfs4_layoutcommit_res *res)
5912 {
5913 __be32 *p;
5914 __u32 sizechanged;
5915 int status;
5916
5917 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5918 res->status = status;
5919 if (status)
5920 return status;
5921
5922 p = xdr_inline_decode(xdr, 4);
5923 if (unlikely(!p))
5924 goto out_overflow;
5925 sizechanged = be32_to_cpup(p);
5926
5927 if (sizechanged) {
5928 /* throw away new size */
5929 p = xdr_inline_decode(xdr, 8);
5930 if (unlikely(!p))
5931 goto out_overflow;
5932 }
5933 return 0;
5934 out_overflow:
5935 print_overflow_msg(__func__, xdr);
5936 return -EIO;
5937 }
5938
5939 static int decode_test_stateid(struct xdr_stream *xdr,
5940 struct nfs41_test_stateid_res *res)
5941 {
5942 __be32 *p;
5943 int status;
5944 int num_res;
5945
5946 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5947 if (status)
5948 return status;
5949
5950 p = xdr_inline_decode(xdr, 4);
5951 if (unlikely(!p))
5952 goto out_overflow;
5953 num_res = be32_to_cpup(p++);
5954 if (num_res != 1)
5955 goto out;
5956
5957 p = xdr_inline_decode(xdr, 4);
5958 if (unlikely(!p))
5959 goto out_overflow;
5960 res->status = be32_to_cpup(p++);
5961
5962 return status;
5963 out_overflow:
5964 print_overflow_msg(__func__, xdr);
5965 out:
5966 return -EIO;
5967 }
5968
5969 static int decode_free_stateid(struct xdr_stream *xdr,
5970 struct nfs41_free_stateid_res *res)
5971 {
5972 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5973 return res->status;
5974 }
5975 #endif /* CONFIG_NFS_V4_1 */
5976
5977 /*
5978 * END OF "GENERIC" DECODE ROUTINES.
5979 */
5980
5981 /*
5982 * Decode OPEN_DOWNGRADE response
5983 */
5984 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5985 struct xdr_stream *xdr,
5986 struct nfs_closeres *res)
5987 {
5988 struct compound_hdr hdr;
5989 int status;
5990
5991 status = decode_compound_hdr(xdr, &hdr);
5992 if (status)
5993 goto out;
5994 status = decode_sequence(xdr, &res->seq_res, rqstp);
5995 if (status)
5996 goto out;
5997 status = decode_putfh(xdr);
5998 if (status)
5999 goto out;
6000 status = decode_open_downgrade(xdr, res);
6001 if (status != 0)
6002 goto out;
6003 decode_getfattr(xdr, res->fattr, res->server);
6004 out:
6005 return status;
6006 }
6007
6008 /*
6009 * Decode ACCESS response
6010 */
6011 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6012 struct nfs4_accessres *res)
6013 {
6014 struct compound_hdr hdr;
6015 int status;
6016
6017 status = decode_compound_hdr(xdr, &hdr);
6018 if (status)
6019 goto out;
6020 status = decode_sequence(xdr, &res->seq_res, rqstp);
6021 if (status)
6022 goto out;
6023 status = decode_putfh(xdr);
6024 if (status != 0)
6025 goto out;
6026 status = decode_access(xdr, &res->supported, &res->access);
6027 if (status != 0)
6028 goto out;
6029 decode_getfattr(xdr, res->fattr, res->server);
6030 out:
6031 return status;
6032 }
6033
6034 /*
6035 * Decode LOOKUP response
6036 */
6037 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6038 struct nfs4_lookup_res *res)
6039 {
6040 struct compound_hdr hdr;
6041 int status;
6042
6043 status = decode_compound_hdr(xdr, &hdr);
6044 if (status)
6045 goto out;
6046 status = decode_sequence(xdr, &res->seq_res, rqstp);
6047 if (status)
6048 goto out;
6049 status = decode_putfh(xdr);
6050 if (status)
6051 goto out;
6052 status = decode_lookup(xdr);
6053 if (status)
6054 goto out;
6055 status = decode_getfh(xdr, res->fh);
6056 if (status)
6057 goto out;
6058 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6059 out:
6060 return status;
6061 }
6062
6063 /*
6064 * Decode LOOKUP_ROOT response
6065 */
6066 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6067 struct xdr_stream *xdr,
6068 struct nfs4_lookup_res *res)
6069 {
6070 struct compound_hdr hdr;
6071 int status;
6072
6073 status = decode_compound_hdr(xdr, &hdr);
6074 if (status)
6075 goto out;
6076 status = decode_sequence(xdr, &res->seq_res, rqstp);
6077 if (status)
6078 goto out;
6079 status = decode_putrootfh(xdr);
6080 if (status)
6081 goto out;
6082 status = decode_getfh(xdr, res->fh);
6083 if (status == 0)
6084 status = decode_getfattr_label(xdr, res->fattr,
6085 res->label, res->server);
6086 out:
6087 return status;
6088 }
6089
6090 /*
6091 * Decode REMOVE response
6092 */
6093 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6094 struct nfs_removeres *res)
6095 {
6096 struct compound_hdr hdr;
6097 int status;
6098
6099 status = decode_compound_hdr(xdr, &hdr);
6100 if (status)
6101 goto out;
6102 status = decode_sequence(xdr, &res->seq_res, rqstp);
6103 if (status)
6104 goto out;
6105 status = decode_putfh(xdr);
6106 if (status)
6107 goto out;
6108 status = decode_remove(xdr, &res->cinfo);
6109 out:
6110 return status;
6111 }
6112
6113 /*
6114 * Decode RENAME response
6115 */
6116 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6117 struct nfs_renameres *res)
6118 {
6119 struct compound_hdr hdr;
6120 int status;
6121
6122 status = decode_compound_hdr(xdr, &hdr);
6123 if (status)
6124 goto out;
6125 status = decode_sequence(xdr, &res->seq_res, rqstp);
6126 if (status)
6127 goto out;
6128 status = decode_putfh(xdr);
6129 if (status)
6130 goto out;
6131 status = decode_savefh(xdr);
6132 if (status)
6133 goto out;
6134 status = decode_putfh(xdr);
6135 if (status)
6136 goto out;
6137 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6138 out:
6139 return status;
6140 }
6141
6142 /*
6143 * Decode LINK response
6144 */
6145 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6146 struct nfs4_link_res *res)
6147 {
6148 struct compound_hdr hdr;
6149 int status;
6150
6151 status = decode_compound_hdr(xdr, &hdr);
6152 if (status)
6153 goto out;
6154 status = decode_sequence(xdr, &res->seq_res, rqstp);
6155 if (status)
6156 goto out;
6157 status = decode_putfh(xdr);
6158 if (status)
6159 goto out;
6160 status = decode_savefh(xdr);
6161 if (status)
6162 goto out;
6163 status = decode_putfh(xdr);
6164 if (status)
6165 goto out;
6166 status = decode_link(xdr, &res->cinfo);
6167 if (status)
6168 goto out;
6169 /*
6170 * Note order: OP_LINK leaves the directory as the current
6171 * filehandle.
6172 */
6173 status = decode_restorefh(xdr);
6174 if (status)
6175 goto out;
6176 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6177 out:
6178 return status;
6179 }
6180
6181 /*
6182 * Decode CREATE response
6183 */
6184 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6185 struct nfs4_create_res *res)
6186 {
6187 struct compound_hdr hdr;
6188 int status;
6189
6190 status = decode_compound_hdr(xdr, &hdr);
6191 if (status)
6192 goto out;
6193 status = decode_sequence(xdr, &res->seq_res, rqstp);
6194 if (status)
6195 goto out;
6196 status = decode_putfh(xdr);
6197 if (status)
6198 goto out;
6199 status = decode_create(xdr, &res->dir_cinfo);
6200 if (status)
6201 goto out;
6202 status = decode_getfh(xdr, res->fh);
6203 if (status)
6204 goto out;
6205 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6206 out:
6207 return status;
6208 }
6209
6210 /*
6211 * Decode SYMLINK response
6212 */
6213 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6214 struct nfs4_create_res *res)
6215 {
6216 return nfs4_xdr_dec_create(rqstp, xdr, res);
6217 }
6218
6219 /*
6220 * Decode GETATTR response
6221 */
6222 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6223 struct nfs4_getattr_res *res)
6224 {
6225 struct compound_hdr hdr;
6226 int status;
6227
6228 status = decode_compound_hdr(xdr, &hdr);
6229 if (status)
6230 goto out;
6231 status = decode_sequence(xdr, &res->seq_res, rqstp);
6232 if (status)
6233 goto out;
6234 status = decode_putfh(xdr);
6235 if (status)
6236 goto out;
6237 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6238 out:
6239 return status;
6240 }
6241
6242 /*
6243 * Encode an SETACL request
6244 */
6245 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6246 struct nfs_setaclargs *args)
6247 {
6248 struct compound_hdr hdr = {
6249 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6250 };
6251
6252 encode_compound_hdr(xdr, req, &hdr);
6253 encode_sequence(xdr, &args->seq_args, &hdr);
6254 encode_putfh(xdr, args->fh, &hdr);
6255 encode_setacl(xdr, args, &hdr);
6256 encode_nops(&hdr);
6257 }
6258
6259 /*
6260 * Decode SETACL response
6261 */
6262 static int
6263 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6264 struct nfs_setaclres *res)
6265 {
6266 struct compound_hdr hdr;
6267 int status;
6268
6269 status = decode_compound_hdr(xdr, &hdr);
6270 if (status)
6271 goto out;
6272 status = decode_sequence(xdr, &res->seq_res, rqstp);
6273 if (status)
6274 goto out;
6275 status = decode_putfh(xdr);
6276 if (status)
6277 goto out;
6278 status = decode_setattr(xdr);
6279 out:
6280 return status;
6281 }
6282
6283 /*
6284 * Decode GETACL response
6285 */
6286 static int
6287 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6288 struct nfs_getaclres *res)
6289 {
6290 struct compound_hdr hdr;
6291 int status;
6292
6293 if (res->acl_scratch != NULL) {
6294 void *p = page_address(res->acl_scratch);
6295 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6296 }
6297 status = decode_compound_hdr(xdr, &hdr);
6298 if (status)
6299 goto out;
6300 status = decode_sequence(xdr, &res->seq_res, rqstp);
6301 if (status)
6302 goto out;
6303 status = decode_putfh(xdr);
6304 if (status)
6305 goto out;
6306 status = decode_getacl(xdr, rqstp, res);
6307
6308 out:
6309 return status;
6310 }
6311
6312 /*
6313 * Decode CLOSE response
6314 */
6315 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6316 struct nfs_closeres *res)
6317 {
6318 struct compound_hdr hdr;
6319 int status;
6320
6321 status = decode_compound_hdr(xdr, &hdr);
6322 if (status)
6323 goto out;
6324 status = decode_sequence(xdr, &res->seq_res, rqstp);
6325 if (status)
6326 goto out;
6327 status = decode_putfh(xdr);
6328 if (status)
6329 goto out;
6330 status = decode_close(xdr, res);
6331 if (status != 0)
6332 goto out;
6333 /*
6334 * Note: Server may do delete on close for this file
6335 * in which case the getattr call will fail with
6336 * an ESTALE error. Shouldn't be a problem,
6337 * though, since fattr->valid will remain unset.
6338 */
6339 decode_getfattr(xdr, res->fattr, res->server);
6340 out:
6341 return status;
6342 }
6343
6344 /*
6345 * Decode OPEN response
6346 */
6347 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6348 struct nfs_openres *res)
6349 {
6350 struct compound_hdr hdr;
6351 int status;
6352
6353 status = decode_compound_hdr(xdr, &hdr);
6354 if (status)
6355 goto out;
6356 status = decode_sequence(xdr, &res->seq_res, rqstp);
6357 if (status)
6358 goto out;
6359 status = decode_putfh(xdr);
6360 if (status)
6361 goto out;
6362 status = decode_open(xdr, res);
6363 if (status)
6364 goto out;
6365 status = decode_getfh(xdr, &res->fh);
6366 if (status)
6367 goto out;
6368 if (res->access_request)
6369 decode_access(xdr, &res->access_supported, &res->access_result);
6370 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6371 out:
6372 return status;
6373 }
6374
6375 /*
6376 * Decode OPEN_CONFIRM response
6377 */
6378 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6379 struct xdr_stream *xdr,
6380 struct nfs_open_confirmres *res)
6381 {
6382 struct compound_hdr hdr;
6383 int status;
6384
6385 status = decode_compound_hdr(xdr, &hdr);
6386 if (status)
6387 goto out;
6388 status = decode_putfh(xdr);
6389 if (status)
6390 goto out;
6391 status = decode_open_confirm(xdr, res);
6392 out:
6393 return status;
6394 }
6395
6396 /*
6397 * Decode OPEN response
6398 */
6399 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6400 struct xdr_stream *xdr,
6401 struct nfs_openres *res)
6402 {
6403 struct compound_hdr hdr;
6404 int status;
6405
6406 status = decode_compound_hdr(xdr, &hdr);
6407 if (status)
6408 goto out;
6409 status = decode_sequence(xdr, &res->seq_res, rqstp);
6410 if (status)
6411 goto out;
6412 status = decode_putfh(xdr);
6413 if (status)
6414 goto out;
6415 status = decode_open(xdr, res);
6416 if (status)
6417 goto out;
6418 if (res->access_request)
6419 decode_access(xdr, &res->access_supported, &res->access_result);
6420 decode_getfattr(xdr, res->f_attr, res->server);
6421 out:
6422 return status;
6423 }
6424
6425 /*
6426 * Decode SETATTR response
6427 */
6428 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6429 struct xdr_stream *xdr,
6430 struct nfs_setattrres *res)
6431 {
6432 struct compound_hdr hdr;
6433 int status;
6434
6435 status = decode_compound_hdr(xdr, &hdr);
6436 if (status)
6437 goto out;
6438 status = decode_sequence(xdr, &res->seq_res, rqstp);
6439 if (status)
6440 goto out;
6441 status = decode_putfh(xdr);
6442 if (status)
6443 goto out;
6444 status = decode_setattr(xdr);
6445 if (status)
6446 goto out;
6447 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6448 out:
6449 return status;
6450 }
6451
6452 /*
6453 * Decode LOCK response
6454 */
6455 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6456 struct nfs_lock_res *res)
6457 {
6458 struct compound_hdr hdr;
6459 int status;
6460
6461 status = decode_compound_hdr(xdr, &hdr);
6462 if (status)
6463 goto out;
6464 status = decode_sequence(xdr, &res->seq_res, rqstp);
6465 if (status)
6466 goto out;
6467 status = decode_putfh(xdr);
6468 if (status)
6469 goto out;
6470 status = decode_lock(xdr, res);
6471 out:
6472 return status;
6473 }
6474
6475 /*
6476 * Decode LOCKT response
6477 */
6478 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479 struct nfs_lockt_res *res)
6480 {
6481 struct compound_hdr hdr;
6482 int status;
6483
6484 status = decode_compound_hdr(xdr, &hdr);
6485 if (status)
6486 goto out;
6487 status = decode_sequence(xdr, &res->seq_res, rqstp);
6488 if (status)
6489 goto out;
6490 status = decode_putfh(xdr);
6491 if (status)
6492 goto out;
6493 status = decode_lockt(xdr, res);
6494 out:
6495 return status;
6496 }
6497
6498 /*
6499 * Decode LOCKU response
6500 */
6501 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6502 struct nfs_locku_res *res)
6503 {
6504 struct compound_hdr hdr;
6505 int status;
6506
6507 status = decode_compound_hdr(xdr, &hdr);
6508 if (status)
6509 goto out;
6510 status = decode_sequence(xdr, &res->seq_res, rqstp);
6511 if (status)
6512 goto out;
6513 status = decode_putfh(xdr);
6514 if (status)
6515 goto out;
6516 status = decode_locku(xdr, res);
6517 out:
6518 return status;
6519 }
6520
6521 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6522 struct xdr_stream *xdr, void *dummy)
6523 {
6524 struct compound_hdr hdr;
6525 int status;
6526
6527 status = decode_compound_hdr(xdr, &hdr);
6528 if (!status)
6529 status = decode_release_lockowner(xdr);
6530 return status;
6531 }
6532
6533 /*
6534 * Decode READLINK response
6535 */
6536 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6537 struct xdr_stream *xdr,
6538 struct nfs4_readlink_res *res)
6539 {
6540 struct compound_hdr hdr;
6541 int status;
6542
6543 status = decode_compound_hdr(xdr, &hdr);
6544 if (status)
6545 goto out;
6546 status = decode_sequence(xdr, &res->seq_res, rqstp);
6547 if (status)
6548 goto out;
6549 status = decode_putfh(xdr);
6550 if (status)
6551 goto out;
6552 status = decode_readlink(xdr, rqstp);
6553 out:
6554 return status;
6555 }
6556
6557 /*
6558 * Decode READDIR response
6559 */
6560 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6561 struct nfs4_readdir_res *res)
6562 {
6563 struct compound_hdr hdr;
6564 int status;
6565
6566 status = decode_compound_hdr(xdr, &hdr);
6567 if (status)
6568 goto out;
6569 status = decode_sequence(xdr, &res->seq_res, rqstp);
6570 if (status)
6571 goto out;
6572 status = decode_putfh(xdr);
6573 if (status)
6574 goto out;
6575 status = decode_readdir(xdr, rqstp, res);
6576 out:
6577 return status;
6578 }
6579
6580 /*
6581 * Decode Read response
6582 */
6583 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584 struct nfs_pgio_res *res)
6585 {
6586 struct compound_hdr hdr;
6587 int status;
6588
6589 status = decode_compound_hdr(xdr, &hdr);
6590 res->op_status = hdr.status;
6591 if (status)
6592 goto out;
6593 status = decode_sequence(xdr, &res->seq_res, rqstp);
6594 if (status)
6595 goto out;
6596 status = decode_putfh(xdr);
6597 if (status)
6598 goto out;
6599 status = decode_read(xdr, rqstp, res);
6600 if (!status)
6601 status = res->count;
6602 out:
6603 return status;
6604 }
6605
6606 /*
6607 * Decode WRITE response
6608 */
6609 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6610 struct nfs_pgio_res *res)
6611 {
6612 struct compound_hdr hdr;
6613 int status;
6614
6615 status = decode_compound_hdr(xdr, &hdr);
6616 res->op_status = hdr.status;
6617 if (status)
6618 goto out;
6619 status = decode_sequence(xdr, &res->seq_res, rqstp);
6620 if (status)
6621 goto out;
6622 status = decode_putfh(xdr);
6623 if (status)
6624 goto out;
6625 status = decode_write(xdr, res);
6626 if (status)
6627 goto out;
6628 if (res->fattr)
6629 decode_getfattr(xdr, res->fattr, res->server);
6630 if (!status)
6631 status = res->count;
6632 out:
6633 return status;
6634 }
6635
6636 /*
6637 * Decode COMMIT response
6638 */
6639 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6640 struct nfs_commitres *res)
6641 {
6642 struct compound_hdr hdr;
6643 int status;
6644
6645 status = decode_compound_hdr(xdr, &hdr);
6646 res->op_status = hdr.status;
6647 if (status)
6648 goto out;
6649 status = decode_sequence(xdr, &res->seq_res, rqstp);
6650 if (status)
6651 goto out;
6652 status = decode_putfh(xdr);
6653 if (status)
6654 goto out;
6655 status = decode_commit(xdr, res);
6656 out:
6657 return status;
6658 }
6659
6660 /*
6661 * Decode FSINFO response
6662 */
6663 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6664 struct nfs4_fsinfo_res *res)
6665 {
6666 struct compound_hdr hdr;
6667 int status;
6668
6669 status = decode_compound_hdr(xdr, &hdr);
6670 if (!status)
6671 status = decode_sequence(xdr, &res->seq_res, req);
6672 if (!status)
6673 status = decode_putfh(xdr);
6674 if (!status)
6675 status = decode_fsinfo(xdr, res->fsinfo);
6676 return status;
6677 }
6678
6679 /*
6680 * Decode PATHCONF response
6681 */
6682 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6683 struct nfs4_pathconf_res *res)
6684 {
6685 struct compound_hdr hdr;
6686 int status;
6687
6688 status = decode_compound_hdr(xdr, &hdr);
6689 if (!status)
6690 status = decode_sequence(xdr, &res->seq_res, req);
6691 if (!status)
6692 status = decode_putfh(xdr);
6693 if (!status)
6694 status = decode_pathconf(xdr, res->pathconf);
6695 return status;
6696 }
6697
6698 /*
6699 * Decode STATFS response
6700 */
6701 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6702 struct nfs4_statfs_res *res)
6703 {
6704 struct compound_hdr hdr;
6705 int status;
6706
6707 status = decode_compound_hdr(xdr, &hdr);
6708 if (!status)
6709 status = decode_sequence(xdr, &res->seq_res, req);
6710 if (!status)
6711 status = decode_putfh(xdr);
6712 if (!status)
6713 status = decode_statfs(xdr, res->fsstat);
6714 return status;
6715 }
6716
6717 /*
6718 * Decode GETATTR_BITMAP response
6719 */
6720 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6721 struct xdr_stream *xdr,
6722 struct nfs4_server_caps_res *res)
6723 {
6724 struct compound_hdr hdr;
6725 int status;
6726
6727 status = decode_compound_hdr(xdr, &hdr);
6728 if (status)
6729 goto out;
6730 status = decode_sequence(xdr, &res->seq_res, req);
6731 if (status)
6732 goto out;
6733 status = decode_putfh(xdr);
6734 if (status)
6735 goto out;
6736 status = decode_server_caps(xdr, res);
6737 out:
6738 return status;
6739 }
6740
6741 /*
6742 * Decode RENEW response
6743 */
6744 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6745 void *__unused)
6746 {
6747 struct compound_hdr hdr;
6748 int status;
6749
6750 status = decode_compound_hdr(xdr, &hdr);
6751 if (!status)
6752 status = decode_renew(xdr);
6753 return status;
6754 }
6755
6756 /*
6757 * Decode SETCLIENTID response
6758 */
6759 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6760 struct xdr_stream *xdr,
6761 struct nfs4_setclientid_res *res)
6762 {
6763 struct compound_hdr hdr;
6764 int status;
6765
6766 status = decode_compound_hdr(xdr, &hdr);
6767 if (!status)
6768 status = decode_setclientid(xdr, res);
6769 return status;
6770 }
6771
6772 /*
6773 * Decode SETCLIENTID_CONFIRM response
6774 */
6775 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6776 struct xdr_stream *xdr)
6777 {
6778 struct compound_hdr hdr;
6779 int status;
6780
6781 status = decode_compound_hdr(xdr, &hdr);
6782 if (!status)
6783 status = decode_setclientid_confirm(xdr);
6784 return status;
6785 }
6786
6787 /*
6788 * Decode DELEGRETURN response
6789 */
6790 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6791 struct xdr_stream *xdr,
6792 struct nfs4_delegreturnres *res)
6793 {
6794 struct compound_hdr hdr;
6795 int status;
6796
6797 status = decode_compound_hdr(xdr, &hdr);
6798 if (status)
6799 goto out;
6800 status = decode_sequence(xdr, &res->seq_res, rqstp);
6801 if (status)
6802 goto out;
6803 status = decode_putfh(xdr);
6804 if (status != 0)
6805 goto out;
6806 status = decode_getfattr(xdr, res->fattr, res->server);
6807 if (status != 0)
6808 goto out;
6809 status = decode_delegreturn(xdr);
6810 out:
6811 return status;
6812 }
6813
6814 /*
6815 * Decode FS_LOCATIONS response
6816 */
6817 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6818 struct xdr_stream *xdr,
6819 struct nfs4_fs_locations_res *res)
6820 {
6821 struct compound_hdr hdr;
6822 int status;
6823
6824 status = decode_compound_hdr(xdr, &hdr);
6825 if (status)
6826 goto out;
6827 status = decode_sequence(xdr, &res->seq_res, req);
6828 if (status)
6829 goto out;
6830 status = decode_putfh(xdr);
6831 if (status)
6832 goto out;
6833 if (res->migration) {
6834 xdr_enter_page(xdr, PAGE_SIZE);
6835 status = decode_getfattr_generic(xdr,
6836 &res->fs_locations->fattr,
6837 NULL, res->fs_locations,
6838 NULL, res->fs_locations->server);
6839 if (status)
6840 goto out;
6841 if (res->renew)
6842 status = decode_renew(xdr);
6843 } else {
6844 status = decode_lookup(xdr);
6845 if (status)
6846 goto out;
6847 xdr_enter_page(xdr, PAGE_SIZE);
6848 status = decode_getfattr_generic(xdr,
6849 &res->fs_locations->fattr,
6850 NULL, res->fs_locations,
6851 NULL, res->fs_locations->server);
6852 }
6853 out:
6854 return status;
6855 }
6856
6857 /*
6858 * Decode SECINFO response
6859 */
6860 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6861 struct xdr_stream *xdr,
6862 struct nfs4_secinfo_res *res)
6863 {
6864 struct compound_hdr hdr;
6865 int status;
6866
6867 status = decode_compound_hdr(xdr, &hdr);
6868 if (status)
6869 goto out;
6870 status = decode_sequence(xdr, &res->seq_res, rqstp);
6871 if (status)
6872 goto out;
6873 status = decode_putfh(xdr);
6874 if (status)
6875 goto out;
6876 status = decode_secinfo(xdr, res);
6877 out:
6878 return status;
6879 }
6880
6881 /*
6882 * Decode FSID_PRESENT response
6883 */
6884 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6885 struct xdr_stream *xdr,
6886 struct nfs4_fsid_present_res *res)
6887 {
6888 struct compound_hdr hdr;
6889 int status;
6890
6891 status = decode_compound_hdr(xdr, &hdr);
6892 if (status)
6893 goto out;
6894 status = decode_sequence(xdr, &res->seq_res, rqstp);
6895 if (status)
6896 goto out;
6897 status = decode_putfh(xdr);
6898 if (status)
6899 goto out;
6900 status = decode_getfh(xdr, res->fh);
6901 if (status)
6902 goto out;
6903 if (res->renew)
6904 status = decode_renew(xdr);
6905 out:
6906 return status;
6907 }
6908
6909 #if defined(CONFIG_NFS_V4_1)
6910 /*
6911 * Decode BIND_CONN_TO_SESSION response
6912 */
6913 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6914 struct xdr_stream *xdr,
6915 void *res)
6916 {
6917 struct compound_hdr hdr;
6918 int status;
6919
6920 status = decode_compound_hdr(xdr, &hdr);
6921 if (!status)
6922 status = decode_bind_conn_to_session(xdr, res);
6923 return status;
6924 }
6925
6926 /*
6927 * Decode EXCHANGE_ID response
6928 */
6929 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6930 struct xdr_stream *xdr,
6931 void *res)
6932 {
6933 struct compound_hdr hdr;
6934 int status;
6935
6936 status = decode_compound_hdr(xdr, &hdr);
6937 if (!status)
6938 status = decode_exchange_id(xdr, res);
6939 return status;
6940 }
6941
6942 /*
6943 * Decode CREATE_SESSION response
6944 */
6945 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6946 struct xdr_stream *xdr,
6947 struct nfs41_create_session_res *res)
6948 {
6949 struct compound_hdr hdr;
6950 int status;
6951
6952 status = decode_compound_hdr(xdr, &hdr);
6953 if (!status)
6954 status = decode_create_session(xdr, res);
6955 return status;
6956 }
6957
6958 /*
6959 * Decode DESTROY_SESSION response
6960 */
6961 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6962 struct xdr_stream *xdr,
6963 void *res)
6964 {
6965 struct compound_hdr hdr;
6966 int status;
6967
6968 status = decode_compound_hdr(xdr, &hdr);
6969 if (!status)
6970 status = decode_destroy_session(xdr, res);
6971 return status;
6972 }
6973
6974 /*
6975 * Decode DESTROY_CLIENTID response
6976 */
6977 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6978 struct xdr_stream *xdr,
6979 void *res)
6980 {
6981 struct compound_hdr hdr;
6982 int status;
6983
6984 status = decode_compound_hdr(xdr, &hdr);
6985 if (!status)
6986 status = decode_destroy_clientid(xdr, res);
6987 return status;
6988 }
6989
6990 /*
6991 * Decode SEQUENCE response
6992 */
6993 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6994 struct xdr_stream *xdr,
6995 struct nfs4_sequence_res *res)
6996 {
6997 struct compound_hdr hdr;
6998 int status;
6999
7000 status = decode_compound_hdr(xdr, &hdr);
7001 if (!status)
7002 status = decode_sequence(xdr, res, rqstp);
7003 return status;
7004 }
7005
7006 /*
7007 * Decode GET_LEASE_TIME response
7008 */
7009 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7010 struct xdr_stream *xdr,
7011 struct nfs4_get_lease_time_res *res)
7012 {
7013 struct compound_hdr hdr;
7014 int status;
7015
7016 status = decode_compound_hdr(xdr, &hdr);
7017 if (!status)
7018 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7019 if (!status)
7020 status = decode_putrootfh(xdr);
7021 if (!status)
7022 status = decode_fsinfo(xdr, res->lr_fsinfo);
7023 return status;
7024 }
7025
7026 /*
7027 * Decode RECLAIM_COMPLETE response
7028 */
7029 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7030 struct xdr_stream *xdr,
7031 struct nfs41_reclaim_complete_res *res)
7032 {
7033 struct compound_hdr hdr;
7034 int status;
7035
7036 status = decode_compound_hdr(xdr, &hdr);
7037 if (!status)
7038 status = decode_sequence(xdr, &res->seq_res, rqstp);
7039 if (!status)
7040 status = decode_reclaim_complete(xdr, NULL);
7041 return status;
7042 }
7043
7044 /*
7045 * Decode GETDEVINFO response
7046 */
7047 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7048 struct xdr_stream *xdr,
7049 struct nfs4_getdeviceinfo_res *res)
7050 {
7051 struct compound_hdr hdr;
7052 int status;
7053
7054 status = decode_compound_hdr(xdr, &hdr);
7055 if (status != 0)
7056 goto out;
7057 status = decode_sequence(xdr, &res->seq_res, rqstp);
7058 if (status != 0)
7059 goto out;
7060 status = decode_getdeviceinfo(xdr, res);
7061 out:
7062 return status;
7063 }
7064
7065 /*
7066 * Decode LAYOUTGET response
7067 */
7068 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7069 struct xdr_stream *xdr,
7070 struct nfs4_layoutget_res *res)
7071 {
7072 struct compound_hdr hdr;
7073 int status;
7074
7075 status = decode_compound_hdr(xdr, &hdr);
7076 if (status)
7077 goto out;
7078 status = decode_sequence(xdr, &res->seq_res, rqstp);
7079 if (status)
7080 goto out;
7081 status = decode_putfh(xdr);
7082 if (status)
7083 goto out;
7084 status = decode_layoutget(xdr, rqstp, res);
7085 out:
7086 return status;
7087 }
7088
7089 /*
7090 * Decode LAYOUTRETURN response
7091 */
7092 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7093 struct xdr_stream *xdr,
7094 struct nfs4_layoutreturn_res *res)
7095 {
7096 struct compound_hdr hdr;
7097 int status;
7098
7099 status = decode_compound_hdr(xdr, &hdr);
7100 if (status)
7101 goto out;
7102 status = decode_sequence(xdr, &res->seq_res, rqstp);
7103 if (status)
7104 goto out;
7105 status = decode_putfh(xdr);
7106 if (status)
7107 goto out;
7108 status = decode_layoutreturn(xdr, res);
7109 out:
7110 return status;
7111 }
7112
7113 /*
7114 * Decode LAYOUTCOMMIT response
7115 */
7116 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7117 struct xdr_stream *xdr,
7118 struct nfs4_layoutcommit_res *res)
7119 {
7120 struct compound_hdr hdr;
7121 int status;
7122
7123 status = decode_compound_hdr(xdr, &hdr);
7124 if (status)
7125 goto out;
7126 status = decode_sequence(xdr, &res->seq_res, rqstp);
7127 if (status)
7128 goto out;
7129 status = decode_putfh(xdr);
7130 if (status)
7131 goto out;
7132 status = decode_layoutcommit(xdr, rqstp, res);
7133 if (status)
7134 goto out;
7135 decode_getfattr(xdr, res->fattr, res->server);
7136 out:
7137 return status;
7138 }
7139
7140 /*
7141 * Decode SECINFO_NO_NAME response
7142 */
7143 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7144 struct xdr_stream *xdr,
7145 struct nfs4_secinfo_res *res)
7146 {
7147 struct compound_hdr hdr;
7148 int status;
7149
7150 status = decode_compound_hdr(xdr, &hdr);
7151 if (status)
7152 goto out;
7153 status = decode_sequence(xdr, &res->seq_res, rqstp);
7154 if (status)
7155 goto out;
7156 status = decode_putrootfh(xdr);
7157 if (status)
7158 goto out;
7159 status = decode_secinfo_no_name(xdr, res);
7160 out:
7161 return status;
7162 }
7163
7164 /*
7165 * Decode TEST_STATEID response
7166 */
7167 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7168 struct xdr_stream *xdr,
7169 struct nfs41_test_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_test_stateid(xdr, res);
7181 out:
7182 return status;
7183 }
7184
7185 /*
7186 * Decode FREE_STATEID response
7187 */
7188 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7189 struct xdr_stream *xdr,
7190 struct nfs41_free_stateid_res *res)
7191 {
7192 struct compound_hdr hdr;
7193 int status;
7194
7195 status = decode_compound_hdr(xdr, &hdr);
7196 if (status)
7197 goto out;
7198 status = decode_sequence(xdr, &res->seq_res, rqstp);
7199 if (status)
7200 goto out;
7201 status = decode_free_stateid(xdr, res);
7202 out:
7203 return status;
7204 }
7205 #endif /* CONFIG_NFS_V4_1 */
7206
7207 /**
7208 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7209 * the local page cache.
7210 * @xdr: XDR stream where entry resides
7211 * @entry: buffer to fill in with entry data
7212 * @plus: boolean indicating whether this should be a readdirplus entry
7213 *
7214 * Returns zero if successful, otherwise a negative errno value is
7215 * returned.
7216 *
7217 * This function is not invoked during READDIR reply decoding, but
7218 * rather whenever an application invokes the getdents(2) system call
7219 * on a directory already in our cache.
7220 */
7221 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7222 int plus)
7223 {
7224 unsigned int savep;
7225 uint32_t bitmap[3] = {0};
7226 uint32_t len;
7227 __be32 *p = xdr_inline_decode(xdr, 4);
7228 if (unlikely(!p))
7229 goto out_overflow;
7230 if (*p == xdr_zero) {
7231 p = xdr_inline_decode(xdr, 4);
7232 if (unlikely(!p))
7233 goto out_overflow;
7234 if (*p == xdr_zero)
7235 return -EAGAIN;
7236 entry->eof = 1;
7237 return -EBADCOOKIE;
7238 }
7239
7240 p = xdr_inline_decode(xdr, 12);
7241 if (unlikely(!p))
7242 goto out_overflow;
7243 entry->prev_cookie = entry->cookie;
7244 p = xdr_decode_hyper(p, &entry->cookie);
7245 entry->len = be32_to_cpup(p);
7246
7247 p = xdr_inline_decode(xdr, entry->len);
7248 if (unlikely(!p))
7249 goto out_overflow;
7250 entry->name = (const char *) p;
7251
7252 /*
7253 * In case the server doesn't return an inode number,
7254 * we fake one here. (We don't use inode number 0,
7255 * since glibc seems to choke on it...)
7256 */
7257 entry->ino = 1;
7258 entry->fattr->valid = 0;
7259
7260 if (decode_attr_bitmap(xdr, bitmap) < 0)
7261 goto out_overflow;
7262
7263 if (decode_attr_length(xdr, &len, &savep) < 0)
7264 goto out_overflow;
7265
7266 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7267 NULL, entry->label, entry->server) < 0)
7268 goto out_overflow;
7269 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7270 entry->ino = entry->fattr->mounted_on_fileid;
7271 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7272 entry->ino = entry->fattr->fileid;
7273
7274 entry->d_type = DT_UNKNOWN;
7275 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7276 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7277
7278 return 0;
7279
7280 out_overflow:
7281 print_overflow_msg(__func__, xdr);
7282 return -EAGAIN;
7283 }
7284
7285 /*
7286 * We need to translate between nfs status return values and
7287 * the local errno values which may not be the same.
7288 */
7289 static struct {
7290 int stat;
7291 int errno;
7292 } nfs_errtbl[] = {
7293 { NFS4_OK, 0 },
7294 { NFS4ERR_PERM, -EPERM },
7295 { NFS4ERR_NOENT, -ENOENT },
7296 { NFS4ERR_IO, -errno_NFSERR_IO},
7297 { NFS4ERR_NXIO, -ENXIO },
7298 { NFS4ERR_ACCESS, -EACCES },
7299 { NFS4ERR_EXIST, -EEXIST },
7300 { NFS4ERR_XDEV, -EXDEV },
7301 { NFS4ERR_NOTDIR, -ENOTDIR },
7302 { NFS4ERR_ISDIR, -EISDIR },
7303 { NFS4ERR_INVAL, -EINVAL },
7304 { NFS4ERR_FBIG, -EFBIG },
7305 { NFS4ERR_NOSPC, -ENOSPC },
7306 { NFS4ERR_ROFS, -EROFS },
7307 { NFS4ERR_MLINK, -EMLINK },
7308 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7309 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7310 { NFS4ERR_DQUOT, -EDQUOT },
7311 { NFS4ERR_STALE, -ESTALE },
7312 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7313 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7314 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7315 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7316 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7317 { NFS4ERR_BADTYPE, -EBADTYPE },
7318 { NFS4ERR_LOCKED, -EAGAIN },
7319 { NFS4ERR_SYMLINK, -ELOOP },
7320 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7321 { NFS4ERR_DEADLOCK, -EDEADLK },
7322 { -1, -EIO }
7323 };
7324
7325 /*
7326 * Convert an NFS error code to a local one.
7327 * This one is used jointly by NFSv2 and NFSv3.
7328 */
7329 static int
7330 nfs4_stat_to_errno(int stat)
7331 {
7332 int i;
7333 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7334 if (nfs_errtbl[i].stat == stat)
7335 return nfs_errtbl[i].errno;
7336 }
7337 if (stat <= 10000 || stat > 10100) {
7338 /* The server is looney tunes. */
7339 return -EREMOTEIO;
7340 }
7341 /* If we cannot translate the error, the recovery routines should
7342 * handle it.
7343 * Note: remaining NFSv4 error codes have values > 10000, so should
7344 * not conflict with native Linux error codes.
7345 */
7346 return -stat;
7347 }
7348
7349 #ifdef CONFIG_NFS_V4_2
7350 #include "nfs42xdr.c"
7351 #endif /* CONFIG_NFS_V4_2 */
7352
7353 #define PROC(proc, argtype, restype) \
7354 [NFSPROC4_CLNT_##proc] = { \
7355 .p_proc = NFSPROC4_COMPOUND, \
7356 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7357 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7358 .p_arglen = NFS4_##argtype##_sz, \
7359 .p_replen = NFS4_##restype##_sz, \
7360 .p_statidx = NFSPROC4_CLNT_##proc, \
7361 .p_name = #proc, \
7362 }
7363
7364 #define STUB(proc) \
7365 [NFSPROC4_CLNT_##proc] = { \
7366 .p_name = #proc, \
7367 }
7368
7369 struct rpc_procinfo nfs4_procedures[] = {
7370 PROC(READ, enc_read, dec_read),
7371 PROC(WRITE, enc_write, dec_write),
7372 PROC(COMMIT, enc_commit, dec_commit),
7373 PROC(OPEN, enc_open, dec_open),
7374 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7375 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7376 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7377 PROC(CLOSE, enc_close, dec_close),
7378 PROC(SETATTR, enc_setattr, dec_setattr),
7379 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7380 PROC(RENEW, enc_renew, dec_renew),
7381 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7382 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7383 PROC(LOCK, enc_lock, dec_lock),
7384 PROC(LOCKT, enc_lockt, dec_lockt),
7385 PROC(LOCKU, enc_locku, dec_locku),
7386 PROC(ACCESS, enc_access, dec_access),
7387 PROC(GETATTR, enc_getattr, dec_getattr),
7388 PROC(LOOKUP, enc_lookup, dec_lookup),
7389 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7390 PROC(REMOVE, enc_remove, dec_remove),
7391 PROC(RENAME, enc_rename, dec_rename),
7392 PROC(LINK, enc_link, dec_link),
7393 PROC(SYMLINK, enc_symlink, dec_symlink),
7394 PROC(CREATE, enc_create, dec_create),
7395 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7396 PROC(STATFS, enc_statfs, dec_statfs),
7397 PROC(READLINK, enc_readlink, dec_readlink),
7398 PROC(READDIR, enc_readdir, dec_readdir),
7399 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7400 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7401 PROC(GETACL, enc_getacl, dec_getacl),
7402 PROC(SETACL, enc_setacl, dec_setacl),
7403 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7404 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7405 PROC(SECINFO, enc_secinfo, dec_secinfo),
7406 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7407 #if defined(CONFIG_NFS_V4_1)
7408 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7409 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7410 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7411 PROC(SEQUENCE, enc_sequence, dec_sequence),
7412 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7413 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7414 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7415 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7416 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7417 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7418 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7419 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7420 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7421 STUB(GETDEVICELIST),
7422 PROC(BIND_CONN_TO_SESSION,
7423 enc_bind_conn_to_session, dec_bind_conn_to_session),
7424 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7425 #endif /* CONFIG_NFS_V4_1 */
7426 #ifdef CONFIG_NFS_V4_2
7427 PROC(SEEK, enc_seek, dec_seek),
7428 PROC(ALLOCATE, enc_allocate, dec_allocate),
7429 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7430 #endif /* CONFIG_NFS_V4_2 */
7431 };
7432
7433 const struct rpc_version nfs_version4 = {
7434 .number = 4,
7435 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7436 .procs = nfs4_procedures
7437 };
7438
7439 /*
7440 * Local variables:
7441 * c-basic-offset: 8
7442 * End:
7443 */
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