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NFSv4: Fix lock on-wire reordering issues
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #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, fmode_t fmode)
1355 {
1356 __be32 *p;
1357
1358 p = reserve_space(xdr, 8);
1359 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1360 case FMODE_READ:
1361 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1362 break;
1363 case FMODE_WRITE:
1364 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1365 break;
1366 case FMODE_READ|FMODE_WRITE:
1367 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1368 break;
1369 default:
1370 *p++ = cpu_to_be32(0);
1371 }
1372 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1373 }
1374
1375 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1376 {
1377 __be32 *p;
1378 /*
1379 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1380 * owner 4 = 32
1381 */
1382 encode_nfs4_seqid(xdr, arg->seqid);
1383 encode_share_access(xdr, arg->fmode);
1384 p = reserve_space(xdr, 36);
1385 p = xdr_encode_hyper(p, arg->clientid);
1386 *p++ = cpu_to_be32(24);
1387 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1388 *p++ = cpu_to_be32(arg->server->s_dev);
1389 *p++ = cpu_to_be32(arg->id.uniquifier);
1390 xdr_encode_hyper(p, arg->id.create_time);
1391 }
1392
1393 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1394 {
1395 struct iattr dummy;
1396 __be32 *p;
1397
1398 p = reserve_space(xdr, 4);
1399 switch(arg->createmode) {
1400 case NFS4_CREATE_UNCHECKED:
1401 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1402 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1403 break;
1404 case NFS4_CREATE_GUARDED:
1405 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1406 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1407 break;
1408 case NFS4_CREATE_EXCLUSIVE:
1409 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1410 encode_nfs4_verifier(xdr, &arg->u.verifier);
1411 break;
1412 case NFS4_CREATE_EXCLUSIVE4_1:
1413 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1414 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415 dummy.ia_valid = 0;
1416 encode_attrs(xdr, &dummy, arg->label, arg->server);
1417 }
1418 }
1419
1420 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1421 {
1422 __be32 *p;
1423
1424 p = reserve_space(xdr, 4);
1425 switch (arg->open_flags & O_CREAT) {
1426 case 0:
1427 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1428 break;
1429 default:
1430 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1431 encode_createmode(xdr, arg);
1432 }
1433 }
1434
1435 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1436 {
1437 __be32 *p;
1438
1439 p = reserve_space(xdr, 4);
1440 switch (delegation_type) {
1441 case 0:
1442 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1443 break;
1444 case FMODE_READ:
1445 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1446 break;
1447 case FMODE_WRITE|FMODE_READ:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1449 break;
1450 default:
1451 BUG();
1452 }
1453 }
1454
1455 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1456 {
1457 __be32 *p;
1458
1459 p = reserve_space(xdr, 4);
1460 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1461 encode_string(xdr, name->len, name->name);
1462 }
1463
1464 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1465 {
1466 __be32 *p;
1467
1468 p = reserve_space(xdr, 4);
1469 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1470 encode_delegation_type(xdr, type);
1471 }
1472
1473 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1474 {
1475 __be32 *p;
1476
1477 p = reserve_space(xdr, 4);
1478 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1479 encode_nfs4_stateid(xdr, stateid);
1480 encode_string(xdr, name->len, name->name);
1481 }
1482
1483 static inline void encode_claim_fh(struct xdr_stream *xdr)
1484 {
1485 __be32 *p;
1486
1487 p = reserve_space(xdr, 4);
1488 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1489 }
1490
1491 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1492 {
1493 __be32 *p;
1494
1495 p = reserve_space(xdr, 4);
1496 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1497 encode_nfs4_stateid(xdr, stateid);
1498 }
1499
1500 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1501 {
1502 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1503 encode_openhdr(xdr, arg);
1504 encode_opentype(xdr, arg);
1505 switch (arg->claim) {
1506 case NFS4_OPEN_CLAIM_NULL:
1507 encode_claim_null(xdr, arg->name);
1508 break;
1509 case NFS4_OPEN_CLAIM_PREVIOUS:
1510 encode_claim_previous(xdr, arg->u.delegation_type);
1511 break;
1512 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1513 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1514 break;
1515 case NFS4_OPEN_CLAIM_FH:
1516 encode_claim_fh(xdr);
1517 break;
1518 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1519 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1520 break;
1521 default:
1522 BUG();
1523 }
1524 }
1525
1526 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1527 {
1528 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1529 encode_nfs4_stateid(xdr, arg->stateid);
1530 encode_nfs4_seqid(xdr, arg->seqid);
1531 }
1532
1533 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1534 {
1535 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1536 encode_nfs4_stateid(xdr, &arg->stateid);
1537 encode_nfs4_seqid(xdr, arg->seqid);
1538 encode_share_access(xdr, arg->fmode);
1539 }
1540
1541 static void
1542 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1543 {
1544 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1545 encode_string(xdr, fh->size, fh->data);
1546 }
1547
1548 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1549 {
1550 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1551 }
1552
1553 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1554 struct compound_hdr *hdr)
1555 {
1556 __be32 *p;
1557
1558 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1559 encode_nfs4_stateid(xdr, &args->stateid);
1560
1561 p = reserve_space(xdr, 12);
1562 p = xdr_encode_hyper(p, args->offset);
1563 *p = cpu_to_be32(args->count);
1564 }
1565
1566 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1567 {
1568 uint32_t attrs[3] = {
1569 FATTR4_WORD0_RDATTR_ERROR,
1570 FATTR4_WORD1_MOUNTED_ON_FILEID,
1571 };
1572 uint32_t dircount = readdir->count >> 1;
1573 __be32 *p, verf[2];
1574 uint32_t attrlen = 0;
1575 unsigned int i;
1576
1577 if (readdir->plus) {
1578 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1579 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1580 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1581 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1582 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1583 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1584 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1585 dircount >>= 1;
1586 }
1587 /* Use mounted_on_fileid only if the server supports it */
1588 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1589 attrs[0] |= FATTR4_WORD0_FILEID;
1590 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1591 attrs[i] &= readdir->bitmask[i];
1592 if (attrs[i] != 0)
1593 attrlen = i+1;
1594 }
1595
1596 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1597 encode_uint64(xdr, readdir->cookie);
1598 encode_nfs4_verifier(xdr, &readdir->verifier);
1599 p = reserve_space(xdr, 12 + (attrlen << 2));
1600 *p++ = cpu_to_be32(dircount);
1601 *p++ = cpu_to_be32(readdir->count);
1602 *p++ = cpu_to_be32(attrlen);
1603 for (i = 0; i < attrlen; i++)
1604 *p++ = cpu_to_be32(attrs[i]);
1605 memcpy(verf, readdir->verifier.data, sizeof(verf));
1606
1607 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1608 __func__,
1609 (unsigned long long)readdir->cookie,
1610 verf[0], verf[1],
1611 attrs[0] & readdir->bitmask[0],
1612 attrs[1] & readdir->bitmask[1],
1613 attrs[2] & readdir->bitmask[2]);
1614 }
1615
1616 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1617 {
1618 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1619 }
1620
1621 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1622 {
1623 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1624 encode_string(xdr, name->len, name->name);
1625 }
1626
1627 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1628 {
1629 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1630 encode_string(xdr, oldname->len, oldname->name);
1631 encode_string(xdr, newname->len, newname->name);
1632 }
1633
1634 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1635 struct compound_hdr *hdr)
1636 {
1637 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1638 encode_uint64(xdr, clid);
1639 }
1640
1641 static void
1642 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1643 {
1644 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1645 }
1646
1647 static void
1648 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1649 {
1650 __be32 *p;
1651
1652 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1653 encode_nfs4_stateid(xdr, &zero_stateid);
1654 p = reserve_space(xdr, 2*4);
1655 *p++ = cpu_to_be32(1);
1656 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1657 p = reserve_space(xdr, 4);
1658 *p = cpu_to_be32(arg->acl_len);
1659 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1660 }
1661
1662 static void
1663 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1664 {
1665 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1666 }
1667
1668 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1669 {
1670 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1671 encode_nfs4_stateid(xdr, &arg->stateid);
1672 encode_attrs(xdr, arg->iap, arg->label, server);
1673 }
1674
1675 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1676 {
1677 __be32 *p;
1678
1679 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1680 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1681
1682 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1683 p = reserve_space(xdr, 4);
1684 *p = cpu_to_be32(setclientid->sc_prog);
1685 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1686 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1687 p = reserve_space(xdr, 4);
1688 *p = cpu_to_be32(setclientid->sc_cb_ident);
1689 }
1690
1691 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1692 {
1693 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1694 decode_setclientid_confirm_maxsz, hdr);
1695 encode_uint64(xdr, arg->clientid);
1696 encode_nfs4_verifier(xdr, &arg->confirm);
1697 }
1698
1699 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1700 struct compound_hdr *hdr)
1701 {
1702 __be32 *p;
1703
1704 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1705 encode_nfs4_stateid(xdr, &args->stateid);
1706
1707 p = reserve_space(xdr, 16);
1708 p = xdr_encode_hyper(p, args->offset);
1709 *p++ = cpu_to_be32(args->stable);
1710 *p = cpu_to_be32(args->count);
1711
1712 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1713 }
1714
1715 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1716 {
1717 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1718 encode_nfs4_stateid(xdr, stateid);
1719 }
1720
1721 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1722 {
1723 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1724 encode_string(xdr, name->len, name->name);
1725 }
1726
1727 #if defined(CONFIG_NFS_V4_1)
1728 /* NFSv4.1 operations */
1729 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1730 struct nfs4_session *session,
1731 struct compound_hdr *hdr)
1732 {
1733 __be32 *p;
1734
1735 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1736 decode_bind_conn_to_session_maxsz, hdr);
1737 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1738 p = xdr_reserve_space(xdr, 8);
1739 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1740 *p = 0; /* use_conn_in_rdma_mode = False */
1741 }
1742
1743 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1744 {
1745 unsigned int i;
1746 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1747 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1748 encode_uint32(xdr, op_map->u.words[i]);
1749 }
1750
1751 static void encode_exchange_id(struct xdr_stream *xdr,
1752 struct nfs41_exchange_id_args *args,
1753 struct compound_hdr *hdr)
1754 {
1755 __be32 *p;
1756 char impl_name[IMPL_NAME_LIMIT];
1757 int len = 0;
1758
1759 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1760 encode_nfs4_verifier(xdr, args->verifier);
1761
1762 encode_string(xdr, args->id_len, args->id);
1763
1764 encode_uint32(xdr, args->flags);
1765 encode_uint32(xdr, args->state_protect.how);
1766
1767 switch (args->state_protect.how) {
1768 case SP4_NONE:
1769 break;
1770 case SP4_MACH_CRED:
1771 encode_op_map(xdr, &args->state_protect.enforce);
1772 encode_op_map(xdr, &args->state_protect.allow);
1773 break;
1774 default:
1775 WARN_ON_ONCE(1);
1776 break;
1777 }
1778
1779 if (send_implementation_id &&
1780 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1781 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1782 <= sizeof(impl_name) + 1)
1783 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1784 utsname()->sysname, utsname()->release,
1785 utsname()->version, utsname()->machine);
1786
1787 if (len > 0) {
1788 encode_uint32(xdr, 1); /* implementation id array length=1 */
1789
1790 encode_string(xdr,
1791 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1792 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1793 encode_string(xdr, len, impl_name);
1794 /* just send zeros for nii_date - the date is in nii_name */
1795 p = reserve_space(xdr, 12);
1796 p = xdr_encode_hyper(p, 0);
1797 *p = cpu_to_be32(0);
1798 } else
1799 encode_uint32(xdr, 0); /* implementation id array length=0 */
1800 }
1801
1802 static void encode_create_session(struct xdr_stream *xdr,
1803 struct nfs41_create_session_args *args,
1804 struct compound_hdr *hdr)
1805 {
1806 __be32 *p;
1807 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1808 uint32_t len;
1809 struct nfs_client *clp = args->client;
1810 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1811 u32 max_resp_sz_cached;
1812
1813 /*
1814 * Assumes OPEN is the biggest non-idempotent compound.
1815 * 2 is the verifier.
1816 */
1817 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1818 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1819
1820 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1821 clp->cl_ipaddr);
1822
1823 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1824 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1825 p = xdr_encode_hyper(p, clp->cl_clientid);
1826 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1827 *p++ = cpu_to_be32(args->flags); /*flags */
1828
1829 /* Fore Channel */
1830 *p++ = cpu_to_be32(0); /* header padding size */
1831 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1832 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1833 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1834 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1835 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1836 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1837
1838 /* Back Channel */
1839 *p++ = cpu_to_be32(0); /* header padding size */
1840 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1841 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1842 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1843 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1844 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1845 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1846
1847 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1848 *p++ = cpu_to_be32(1);
1849 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1850
1851 /* authsys_parms rfc1831 */
1852 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1853 p = xdr_encode_opaque(p, machine_name, len);
1854 *p++ = cpu_to_be32(0); /* UID */
1855 *p++ = cpu_to_be32(0); /* GID */
1856 *p = cpu_to_be32(0); /* No more gids */
1857 }
1858
1859 static void encode_destroy_session(struct xdr_stream *xdr,
1860 struct nfs4_session *session,
1861 struct compound_hdr *hdr)
1862 {
1863 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1864 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865 }
1866
1867 static void encode_destroy_clientid(struct xdr_stream *xdr,
1868 uint64_t clientid,
1869 struct compound_hdr *hdr)
1870 {
1871 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1872 encode_uint64(xdr, clientid);
1873 }
1874
1875 static void encode_reclaim_complete(struct xdr_stream *xdr,
1876 struct nfs41_reclaim_complete_args *args,
1877 struct compound_hdr *hdr)
1878 {
1879 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1880 encode_uint32(xdr, args->one_fs);
1881 }
1882 #endif /* CONFIG_NFS_V4_1 */
1883
1884 static void encode_sequence(struct xdr_stream *xdr,
1885 const struct nfs4_sequence_args *args,
1886 struct compound_hdr *hdr)
1887 {
1888 #if defined(CONFIG_NFS_V4_1)
1889 struct nfs4_session *session;
1890 struct nfs4_slot_table *tp;
1891 struct nfs4_slot *slot = args->sa_slot;
1892 __be32 *p;
1893
1894 tp = slot->table;
1895 session = tp->session;
1896 if (!session)
1897 return;
1898
1899 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1900
1901 /*
1902 * Sessionid + seqid + slotid + max slotid + cache_this
1903 */
1904 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1905 "max_slotid=%d cache_this=%d\n",
1906 __func__,
1907 ((u32 *)session->sess_id.data)[0],
1908 ((u32 *)session->sess_id.data)[1],
1909 ((u32 *)session->sess_id.data)[2],
1910 ((u32 *)session->sess_id.data)[3],
1911 slot->seq_nr, slot->slot_nr,
1912 tp->highest_used_slotid, args->sa_cache_this);
1913 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1914 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1915 *p++ = cpu_to_be32(slot->seq_nr);
1916 *p++ = cpu_to_be32(slot->slot_nr);
1917 *p++ = cpu_to_be32(tp->highest_used_slotid);
1918 *p = cpu_to_be32(args->sa_cache_this);
1919 #endif /* CONFIG_NFS_V4_1 */
1920 }
1921
1922 #ifdef CONFIG_NFS_V4_1
1923 static void
1924 encode_getdeviceinfo(struct xdr_stream *xdr,
1925 const struct nfs4_getdeviceinfo_args *args,
1926 struct compound_hdr *hdr)
1927 {
1928 __be32 *p;
1929
1930 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1931 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1932 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1933 NFS4_DEVICEID4_SIZE);
1934 *p++ = cpu_to_be32(args->pdev->layout_type);
1935 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1936
1937 p = reserve_space(xdr, 4 + 4);
1938 *p++ = cpu_to_be32(1); /* bitmap length */
1939 *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1940 }
1941
1942 static void
1943 encode_layoutget(struct xdr_stream *xdr,
1944 const struct nfs4_layoutget_args *args,
1945 struct compound_hdr *hdr)
1946 {
1947 __be32 *p;
1948
1949 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1950 p = reserve_space(xdr, 36);
1951 *p++ = cpu_to_be32(0); /* Signal layout available */
1952 *p++ = cpu_to_be32(args->type);
1953 *p++ = cpu_to_be32(args->range.iomode);
1954 p = xdr_encode_hyper(p, args->range.offset);
1955 p = xdr_encode_hyper(p, args->range.length);
1956 p = xdr_encode_hyper(p, args->minlength);
1957 encode_nfs4_stateid(xdr, &args->stateid);
1958 encode_uint32(xdr, args->maxcount);
1959
1960 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1961 __func__,
1962 args->type,
1963 args->range.iomode,
1964 (unsigned long)args->range.offset,
1965 (unsigned long)args->range.length,
1966 args->maxcount);
1967 }
1968
1969 static int
1970 encode_layoutcommit(struct xdr_stream *xdr,
1971 struct inode *inode,
1972 struct nfs4_layoutcommit_args *args,
1973 struct compound_hdr *hdr)
1974 {
1975 __be32 *p;
1976
1977 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1978 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1979
1980 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1981 p = reserve_space(xdr, 20);
1982 /* Only whole file layouts */
1983 p = xdr_encode_hyper(p, 0); /* offset */
1984 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1985 *p = cpu_to_be32(0); /* reclaim */
1986 encode_nfs4_stateid(xdr, &args->stateid);
1987 p = reserve_space(xdr, 20);
1988 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1989 p = xdr_encode_hyper(p, args->lastbytewritten);
1990 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1991 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1992
1993 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1994 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1995 NFS_I(inode)->layout, xdr, args);
1996 } else {
1997 encode_uint32(xdr, args->layoutupdate_len);
1998 if (args->layoutupdate_pages) {
1999 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2000 args->layoutupdate_len);
2001 }
2002 }
2003
2004 return 0;
2005 }
2006
2007 static void
2008 encode_layoutreturn(struct xdr_stream *xdr,
2009 const struct nfs4_layoutreturn_args *args,
2010 struct compound_hdr *hdr)
2011 {
2012 __be32 *p;
2013
2014 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2015 p = reserve_space(xdr, 16);
2016 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2017 *p++ = cpu_to_be32(args->layout_type);
2018 *p++ = cpu_to_be32(IOMODE_ANY);
2019 *p = cpu_to_be32(RETURN_FILE);
2020 p = reserve_space(xdr, 16);
2021 p = xdr_encode_hyper(p, 0);
2022 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2023 spin_lock(&args->inode->i_lock);
2024 encode_nfs4_stateid(xdr, &args->stateid);
2025 spin_unlock(&args->inode->i_lock);
2026 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2027 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2028 NFS_I(args->inode)->layout, xdr, args);
2029 } else
2030 encode_uint32(xdr, 0);
2031 }
2032
2033 static int
2034 encode_secinfo_no_name(struct xdr_stream *xdr,
2035 const struct nfs41_secinfo_no_name_args *args,
2036 struct compound_hdr *hdr)
2037 {
2038 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2039 encode_uint32(xdr, args->style);
2040 return 0;
2041 }
2042
2043 static void encode_test_stateid(struct xdr_stream *xdr,
2044 struct nfs41_test_stateid_args *args,
2045 struct compound_hdr *hdr)
2046 {
2047 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2048 encode_uint32(xdr, 1);
2049 encode_nfs4_stateid(xdr, args->stateid);
2050 }
2051
2052 static void encode_free_stateid(struct xdr_stream *xdr,
2053 struct nfs41_free_stateid_args *args,
2054 struct compound_hdr *hdr)
2055 {
2056 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2057 encode_nfs4_stateid(xdr, &args->stateid);
2058 }
2059 #endif /* CONFIG_NFS_V4_1 */
2060
2061 /*
2062 * END OF "GENERIC" ENCODE ROUTINES.
2063 */
2064
2065 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2066 {
2067 #if defined(CONFIG_NFS_V4_1)
2068 struct nfs4_session *session = args->sa_slot->table->session;
2069 if (session)
2070 return session->clp->cl_mvops->minor_version;
2071 #endif /* CONFIG_NFS_V4_1 */
2072 return 0;
2073 }
2074
2075 /*
2076 * Encode an ACCESS request
2077 */
2078 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2079 const struct nfs4_accessargs *args)
2080 {
2081 struct compound_hdr hdr = {
2082 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2083 };
2084
2085 encode_compound_hdr(xdr, req, &hdr);
2086 encode_sequence(xdr, &args->seq_args, &hdr);
2087 encode_putfh(xdr, args->fh, &hdr);
2088 encode_access(xdr, args->access, &hdr);
2089 encode_getfattr(xdr, args->bitmask, &hdr);
2090 encode_nops(&hdr);
2091 }
2092
2093 /*
2094 * Encode LOOKUP request
2095 */
2096 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2097 const struct nfs4_lookup_arg *args)
2098 {
2099 struct compound_hdr hdr = {
2100 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101 };
2102
2103 encode_compound_hdr(xdr, req, &hdr);
2104 encode_sequence(xdr, &args->seq_args, &hdr);
2105 encode_putfh(xdr, args->dir_fh, &hdr);
2106 encode_lookup(xdr, args->name, &hdr);
2107 encode_getfh(xdr, &hdr);
2108 encode_getfattr(xdr, args->bitmask, &hdr);
2109 encode_nops(&hdr);
2110 }
2111
2112 /*
2113 * Encode LOOKUP_ROOT request
2114 */
2115 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2116 struct xdr_stream *xdr,
2117 const struct nfs4_lookup_root_arg *args)
2118 {
2119 struct compound_hdr hdr = {
2120 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121 };
2122
2123 encode_compound_hdr(xdr, req, &hdr);
2124 encode_sequence(xdr, &args->seq_args, &hdr);
2125 encode_putrootfh(xdr, &hdr);
2126 encode_getfh(xdr, &hdr);
2127 encode_getfattr(xdr, args->bitmask, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode REMOVE request
2133 */
2134 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2135 const struct nfs_removeargs *args)
2136 {
2137 struct compound_hdr hdr = {
2138 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139 };
2140
2141 encode_compound_hdr(xdr, req, &hdr);
2142 encode_sequence(xdr, &args->seq_args, &hdr);
2143 encode_putfh(xdr, args->fh, &hdr);
2144 encode_remove(xdr, &args->name, &hdr);
2145 encode_nops(&hdr);
2146 }
2147
2148 /*
2149 * Encode RENAME request
2150 */
2151 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2152 const struct nfs_renameargs *args)
2153 {
2154 struct compound_hdr hdr = {
2155 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2156 };
2157
2158 encode_compound_hdr(xdr, req, &hdr);
2159 encode_sequence(xdr, &args->seq_args, &hdr);
2160 encode_putfh(xdr, args->old_dir, &hdr);
2161 encode_savefh(xdr, &hdr);
2162 encode_putfh(xdr, args->new_dir, &hdr);
2163 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2164 encode_nops(&hdr);
2165 }
2166
2167 /*
2168 * Encode LINK request
2169 */
2170 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2171 const struct nfs4_link_arg *args)
2172 {
2173 struct compound_hdr hdr = {
2174 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2175 };
2176
2177 encode_compound_hdr(xdr, req, &hdr);
2178 encode_sequence(xdr, &args->seq_args, &hdr);
2179 encode_putfh(xdr, args->fh, &hdr);
2180 encode_savefh(xdr, &hdr);
2181 encode_putfh(xdr, args->dir_fh, &hdr);
2182 encode_link(xdr, args->name, &hdr);
2183 encode_restorefh(xdr, &hdr);
2184 encode_getfattr(xdr, args->bitmask, &hdr);
2185 encode_nops(&hdr);
2186 }
2187
2188 /*
2189 * Encode CREATE request
2190 */
2191 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2192 const struct nfs4_create_arg *args)
2193 {
2194 struct compound_hdr hdr = {
2195 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196 };
2197
2198 encode_compound_hdr(xdr, req, &hdr);
2199 encode_sequence(xdr, &args->seq_args, &hdr);
2200 encode_putfh(xdr, args->dir_fh, &hdr);
2201 encode_create(xdr, args, &hdr);
2202 encode_getfh(xdr, &hdr);
2203 encode_getfattr(xdr, args->bitmask, &hdr);
2204 encode_nops(&hdr);
2205 }
2206
2207 /*
2208 * Encode SYMLINK request
2209 */
2210 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2211 const struct nfs4_create_arg *args)
2212 {
2213 nfs4_xdr_enc_create(req, xdr, args);
2214 }
2215
2216 /*
2217 * Encode GETATTR request
2218 */
2219 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2220 const struct nfs4_getattr_arg *args)
2221 {
2222 struct compound_hdr hdr = {
2223 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2224 };
2225
2226 encode_compound_hdr(xdr, req, &hdr);
2227 encode_sequence(xdr, &args->seq_args, &hdr);
2228 encode_putfh(xdr, args->fh, &hdr);
2229 encode_getfattr(xdr, args->bitmask, &hdr);
2230 encode_nops(&hdr);
2231 }
2232
2233 /*
2234 * Encode a CLOSE request
2235 */
2236 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2237 struct nfs_closeargs *args)
2238 {
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 encode_compound_hdr(xdr, req, &hdr);
2244 encode_sequence(xdr, &args->seq_args, &hdr);
2245 encode_putfh(xdr, args->fh, &hdr);
2246 encode_close(xdr, args, &hdr);
2247 encode_getfattr(xdr, args->bitmask, &hdr);
2248 encode_nops(&hdr);
2249 }
2250
2251 /*
2252 * Encode an OPEN request
2253 */
2254 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2255 struct nfs_openargs *args)
2256 {
2257 struct compound_hdr hdr = {
2258 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259 };
2260
2261 encode_compound_hdr(xdr, req, &hdr);
2262 encode_sequence(xdr, &args->seq_args, &hdr);
2263 encode_putfh(xdr, args->fh, &hdr);
2264 encode_open(xdr, args, &hdr);
2265 encode_getfh(xdr, &hdr);
2266 if (args->access)
2267 encode_access(xdr, args->access, &hdr);
2268 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2269 encode_nops(&hdr);
2270 }
2271
2272 /*
2273 * Encode an OPEN_CONFIRM request
2274 */
2275 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2276 struct xdr_stream *xdr,
2277 struct nfs_open_confirmargs *args)
2278 {
2279 struct compound_hdr hdr = {
2280 .nops = 0,
2281 };
2282
2283 encode_compound_hdr(xdr, req, &hdr);
2284 encode_putfh(xdr, args->fh, &hdr);
2285 encode_open_confirm(xdr, args, &hdr);
2286 encode_nops(&hdr);
2287 }
2288
2289 /*
2290 * Encode an OPEN request with no attributes.
2291 */
2292 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2293 struct xdr_stream *xdr,
2294 struct nfs_openargs *args)
2295 {
2296 struct compound_hdr hdr = {
2297 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298 };
2299
2300 encode_compound_hdr(xdr, req, &hdr);
2301 encode_sequence(xdr, &args->seq_args, &hdr);
2302 encode_putfh(xdr, args->fh, &hdr);
2303 encode_open(xdr, args, &hdr);
2304 if (args->access)
2305 encode_access(xdr, args->access, &hdr);
2306 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2307 encode_nops(&hdr);
2308 }
2309
2310 /*
2311 * Encode an OPEN_DOWNGRADE request
2312 */
2313 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2314 struct xdr_stream *xdr,
2315 struct nfs_closeargs *args)
2316 {
2317 struct compound_hdr hdr = {
2318 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319 };
2320
2321 encode_compound_hdr(xdr, req, &hdr);
2322 encode_sequence(xdr, &args->seq_args, &hdr);
2323 encode_putfh(xdr, args->fh, &hdr);
2324 encode_open_downgrade(xdr, args, &hdr);
2325 encode_getfattr(xdr, args->bitmask, &hdr);
2326 encode_nops(&hdr);
2327 }
2328
2329 /*
2330 * Encode a LOCK request
2331 */
2332 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2333 struct nfs_lock_args *args)
2334 {
2335 struct compound_hdr hdr = {
2336 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337 };
2338
2339 encode_compound_hdr(xdr, req, &hdr);
2340 encode_sequence(xdr, &args->seq_args, &hdr);
2341 encode_putfh(xdr, args->fh, &hdr);
2342 encode_lock(xdr, args, &hdr);
2343 encode_nops(&hdr);
2344 }
2345
2346 /*
2347 * Encode a LOCKT request
2348 */
2349 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2350 struct nfs_lockt_args *args)
2351 {
2352 struct compound_hdr hdr = {
2353 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354 };
2355
2356 encode_compound_hdr(xdr, req, &hdr);
2357 encode_sequence(xdr, &args->seq_args, &hdr);
2358 encode_putfh(xdr, args->fh, &hdr);
2359 encode_lockt(xdr, args, &hdr);
2360 encode_nops(&hdr);
2361 }
2362
2363 /*
2364 * Encode a LOCKU request
2365 */
2366 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2367 struct nfs_locku_args *args)
2368 {
2369 struct compound_hdr hdr = {
2370 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371 };
2372
2373 encode_compound_hdr(xdr, req, &hdr);
2374 encode_sequence(xdr, &args->seq_args, &hdr);
2375 encode_putfh(xdr, args->fh, &hdr);
2376 encode_locku(xdr, args, &hdr);
2377 encode_nops(&hdr);
2378 }
2379
2380 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2381 struct xdr_stream *xdr,
2382 struct nfs_release_lockowner_args *args)
2383 {
2384 struct compound_hdr hdr = {
2385 .minorversion = 0,
2386 };
2387
2388 encode_compound_hdr(xdr, req, &hdr);
2389 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2390 encode_nops(&hdr);
2391 }
2392
2393 /*
2394 * Encode a READLINK request
2395 */
2396 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2397 const struct nfs4_readlink *args)
2398 {
2399 struct compound_hdr hdr = {
2400 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_sequence(xdr, &args->seq_args, &hdr);
2405 encode_putfh(xdr, args->fh, &hdr);
2406 encode_readlink(xdr, args, req, &hdr);
2407
2408 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2409 args->pgbase, args->pglen);
2410 encode_nops(&hdr);
2411 }
2412
2413 /*
2414 * Encode a READDIR request
2415 */
2416 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2417 const struct nfs4_readdir_arg *args)
2418 {
2419 struct compound_hdr hdr = {
2420 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2421 };
2422
2423 encode_compound_hdr(xdr, req, &hdr);
2424 encode_sequence(xdr, &args->seq_args, &hdr);
2425 encode_putfh(xdr, args->fh, &hdr);
2426 encode_readdir(xdr, args, req, &hdr);
2427
2428 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2429 args->pgbase, args->count);
2430 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2431 __func__, hdr.replen << 2, args->pages,
2432 args->pgbase, args->count);
2433 encode_nops(&hdr);
2434 }
2435
2436 /*
2437 * Encode a READ request
2438 */
2439 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2440 struct nfs_pgio_args *args)
2441 {
2442 struct compound_hdr hdr = {
2443 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_sequence(xdr, &args->seq_args, &hdr);
2448 encode_putfh(xdr, args->fh, &hdr);
2449 encode_read(xdr, args, &hdr);
2450
2451 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2452 args->pages, args->pgbase, args->count);
2453 req->rq_rcv_buf.flags |= XDRBUF_READ;
2454 encode_nops(&hdr);
2455 }
2456
2457 /*
2458 * Encode an SETATTR request
2459 */
2460 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2461 struct nfs_setattrargs *args)
2462 {
2463 struct compound_hdr hdr = {
2464 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465 };
2466
2467 encode_compound_hdr(xdr, req, &hdr);
2468 encode_sequence(xdr, &args->seq_args, &hdr);
2469 encode_putfh(xdr, args->fh, &hdr);
2470 encode_setattr(xdr, args, args->server, &hdr);
2471 encode_getfattr(xdr, args->bitmask, &hdr);
2472 encode_nops(&hdr);
2473 }
2474
2475 /*
2476 * Encode a GETACL request
2477 */
2478 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2479 struct nfs_getaclargs *args)
2480 {
2481 struct compound_hdr hdr = {
2482 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483 };
2484 uint32_t replen;
2485
2486 encode_compound_hdr(xdr, req, &hdr);
2487 encode_sequence(xdr, &args->seq_args, &hdr);
2488 encode_putfh(xdr, args->fh, &hdr);
2489 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2490 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2491
2492 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2493 args->acl_pages, args->acl_pgbase, args->acl_len);
2494
2495 encode_nops(&hdr);
2496 }
2497
2498 /*
2499 * Encode a WRITE request
2500 */
2501 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2502 struct nfs_pgio_args *args)
2503 {
2504 struct compound_hdr hdr = {
2505 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2506 };
2507
2508 encode_compound_hdr(xdr, req, &hdr);
2509 encode_sequence(xdr, &args->seq_args, &hdr);
2510 encode_putfh(xdr, args->fh, &hdr);
2511 encode_write(xdr, args, &hdr);
2512 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2513 if (args->bitmask)
2514 encode_getfattr(xdr, args->bitmask, &hdr);
2515 encode_nops(&hdr);
2516 }
2517
2518 /*
2519 * a COMMIT request
2520 */
2521 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2522 struct nfs_commitargs *args)
2523 {
2524 struct compound_hdr hdr = {
2525 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2526 };
2527
2528 encode_compound_hdr(xdr, req, &hdr);
2529 encode_sequence(xdr, &args->seq_args, &hdr);
2530 encode_putfh(xdr, args->fh, &hdr);
2531 encode_commit(xdr, args, &hdr);
2532 encode_nops(&hdr);
2533 }
2534
2535 /*
2536 * FSINFO request
2537 */
2538 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2539 struct nfs4_fsinfo_arg *args)
2540 {
2541 struct compound_hdr hdr = {
2542 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543 };
2544
2545 encode_compound_hdr(xdr, req, &hdr);
2546 encode_sequence(xdr, &args->seq_args, &hdr);
2547 encode_putfh(xdr, args->fh, &hdr);
2548 encode_fsinfo(xdr, args->bitmask, &hdr);
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * a PATHCONF request
2554 */
2555 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const struct nfs4_pathconf_arg *args)
2557 {
2558 struct compound_hdr hdr = {
2559 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560 };
2561
2562 encode_compound_hdr(xdr, req, &hdr);
2563 encode_sequence(xdr, &args->seq_args, &hdr);
2564 encode_putfh(xdr, args->fh, &hdr);
2565 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2566 &hdr);
2567 encode_nops(&hdr);
2568 }
2569
2570 /*
2571 * a STATFS request
2572 */
2573 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2574 const struct nfs4_statfs_arg *args)
2575 {
2576 struct compound_hdr hdr = {
2577 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578 };
2579
2580 encode_compound_hdr(xdr, req, &hdr);
2581 encode_sequence(xdr, &args->seq_args, &hdr);
2582 encode_putfh(xdr, args->fh, &hdr);
2583 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2584 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2585 encode_nops(&hdr);
2586 }
2587
2588 /*
2589 * GETATTR_BITMAP request
2590 */
2591 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2592 struct xdr_stream *xdr,
2593 struct nfs4_server_caps_arg *args)
2594 {
2595 struct compound_hdr hdr = {
2596 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597 };
2598
2599 encode_compound_hdr(xdr, req, &hdr);
2600 encode_sequence(xdr, &args->seq_args, &hdr);
2601 encode_putfh(xdr, args->fhandle, &hdr);
2602 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2603 FATTR4_WORD0_FH_EXPIRE_TYPE|
2604 FATTR4_WORD0_LINK_SUPPORT|
2605 FATTR4_WORD0_SYMLINK_SUPPORT|
2606 FATTR4_WORD0_ACLSUPPORT, &hdr);
2607 encode_nops(&hdr);
2608 }
2609
2610 /*
2611 * a RENEW request
2612 */
2613 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2614 struct nfs_client *clp)
2615 {
2616 struct compound_hdr hdr = {
2617 .nops = 0,
2618 };
2619
2620 encode_compound_hdr(xdr, req, &hdr);
2621 encode_renew(xdr, clp->cl_clientid, &hdr);
2622 encode_nops(&hdr);
2623 }
2624
2625 /*
2626 * a SETCLIENTID request
2627 */
2628 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2629 struct xdr_stream *xdr,
2630 struct nfs4_setclientid *sc)
2631 {
2632 struct compound_hdr hdr = {
2633 .nops = 0,
2634 };
2635
2636 encode_compound_hdr(xdr, req, &hdr);
2637 encode_setclientid(xdr, sc, &hdr);
2638 encode_nops(&hdr);
2639 }
2640
2641 /*
2642 * a SETCLIENTID_CONFIRM request
2643 */
2644 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2645 struct xdr_stream *xdr,
2646 struct nfs4_setclientid_res *arg)
2647 {
2648 struct compound_hdr hdr = {
2649 .nops = 0,
2650 };
2651
2652 encode_compound_hdr(xdr, req, &hdr);
2653 encode_setclientid_confirm(xdr, arg, &hdr);
2654 encode_nops(&hdr);
2655 }
2656
2657 /*
2658 * DELEGRETURN request
2659 */
2660 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2661 struct xdr_stream *xdr,
2662 const struct nfs4_delegreturnargs *args)
2663 {
2664 struct compound_hdr hdr = {
2665 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2666 };
2667
2668 encode_compound_hdr(xdr, req, &hdr);
2669 encode_sequence(xdr, &args->seq_args, &hdr);
2670 encode_putfh(xdr, args->fhandle, &hdr);
2671 encode_getfattr(xdr, args->bitmask, &hdr);
2672 encode_delegreturn(xdr, args->stateid, &hdr);
2673 encode_nops(&hdr);
2674 }
2675
2676 /*
2677 * Encode FS_LOCATIONS request
2678 */
2679 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2680 struct xdr_stream *xdr,
2681 struct nfs4_fs_locations_arg *args)
2682 {
2683 struct compound_hdr hdr = {
2684 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2685 };
2686 uint32_t replen;
2687
2688 encode_compound_hdr(xdr, req, &hdr);
2689 encode_sequence(xdr, &args->seq_args, &hdr);
2690 if (args->migration) {
2691 encode_putfh(xdr, args->fh, &hdr);
2692 replen = hdr.replen;
2693 encode_fs_locations(xdr, args->bitmask, &hdr);
2694 if (args->renew)
2695 encode_renew(xdr, args->clientid, &hdr);
2696 } else {
2697 encode_putfh(xdr, args->dir_fh, &hdr);
2698 encode_lookup(xdr, args->name, &hdr);
2699 replen = hdr.replen;
2700 encode_fs_locations(xdr, args->bitmask, &hdr);
2701 }
2702
2703 /* Set up reply kvec to capture returned fs_locations array. */
2704 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2705 0, PAGE_SIZE);
2706 encode_nops(&hdr);
2707 }
2708
2709 /*
2710 * Encode SECINFO request
2711 */
2712 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2713 struct xdr_stream *xdr,
2714 struct nfs4_secinfo_arg *args)
2715 {
2716 struct compound_hdr hdr = {
2717 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2718 };
2719
2720 encode_compound_hdr(xdr, req, &hdr);
2721 encode_sequence(xdr, &args->seq_args, &hdr);
2722 encode_putfh(xdr, args->dir_fh, &hdr);
2723 encode_secinfo(xdr, args->name, &hdr);
2724 encode_nops(&hdr);
2725 }
2726
2727 /*
2728 * Encode FSID_PRESENT request
2729 */
2730 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2731 struct xdr_stream *xdr,
2732 struct nfs4_fsid_present_arg *args)
2733 {
2734 struct compound_hdr hdr = {
2735 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2736 };
2737
2738 encode_compound_hdr(xdr, req, &hdr);
2739 encode_sequence(xdr, &args->seq_args, &hdr);
2740 encode_putfh(xdr, args->fh, &hdr);
2741 encode_getfh(xdr, &hdr);
2742 if (args->renew)
2743 encode_renew(xdr, args->clientid, &hdr);
2744 encode_nops(&hdr);
2745 }
2746
2747 #if defined(CONFIG_NFS_V4_1)
2748 /*
2749 * BIND_CONN_TO_SESSION request
2750 */
2751 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2752 struct xdr_stream *xdr,
2753 struct nfs_client *clp)
2754 {
2755 struct compound_hdr hdr = {
2756 .minorversion = clp->cl_mvops->minor_version,
2757 };
2758
2759 encode_compound_hdr(xdr, req, &hdr);
2760 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2761 encode_nops(&hdr);
2762 }
2763
2764 /*
2765 * EXCHANGE_ID request
2766 */
2767 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 struct nfs41_exchange_id_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_exchange_id(xdr, args, &hdr);
2777 encode_nops(&hdr);
2778 }
2779
2780 /*
2781 * a CREATE_SESSION request
2782 */
2783 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2784 struct xdr_stream *xdr,
2785 struct nfs41_create_session_args *args)
2786 {
2787 struct compound_hdr hdr = {
2788 .minorversion = args->client->cl_mvops->minor_version,
2789 };
2790
2791 encode_compound_hdr(xdr, req, &hdr);
2792 encode_create_session(xdr, args, &hdr);
2793 encode_nops(&hdr);
2794 }
2795
2796 /*
2797 * a DESTROY_SESSION request
2798 */
2799 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2800 struct xdr_stream *xdr,
2801 struct nfs4_session *session)
2802 {
2803 struct compound_hdr hdr = {
2804 .minorversion = session->clp->cl_mvops->minor_version,
2805 };
2806
2807 encode_compound_hdr(xdr, req, &hdr);
2808 encode_destroy_session(xdr, session, &hdr);
2809 encode_nops(&hdr);
2810 }
2811
2812 /*
2813 * a DESTROY_CLIENTID request
2814 */
2815 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2816 struct xdr_stream *xdr,
2817 struct nfs_client *clp)
2818 {
2819 struct compound_hdr hdr = {
2820 .minorversion = clp->cl_mvops->minor_version,
2821 };
2822
2823 encode_compound_hdr(xdr, req, &hdr);
2824 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2825 encode_nops(&hdr);
2826 }
2827
2828 /*
2829 * a SEQUENCE request
2830 */
2831 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2832 struct nfs4_sequence_args *args)
2833 {
2834 struct compound_hdr hdr = {
2835 .minorversion = nfs4_xdr_minorversion(args),
2836 };
2837
2838 encode_compound_hdr(xdr, req, &hdr);
2839 encode_sequence(xdr, args, &hdr);
2840 encode_nops(&hdr);
2841 }
2842
2843 /*
2844 * a GET_LEASE_TIME request
2845 */
2846 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2847 struct xdr_stream *xdr,
2848 struct nfs4_get_lease_time_args *args)
2849 {
2850 struct compound_hdr hdr = {
2851 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2852 };
2853 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2854
2855 encode_compound_hdr(xdr, req, &hdr);
2856 encode_sequence(xdr, &args->la_seq_args, &hdr);
2857 encode_putrootfh(xdr, &hdr);
2858 encode_fsinfo(xdr, lease_bitmap, &hdr);
2859 encode_nops(&hdr);
2860 }
2861
2862 /*
2863 * a RECLAIM_COMPLETE request
2864 */
2865 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2866 struct xdr_stream *xdr,
2867 struct nfs41_reclaim_complete_args *args)
2868 {
2869 struct compound_hdr hdr = {
2870 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2871 };
2872
2873 encode_compound_hdr(xdr, req, &hdr);
2874 encode_sequence(xdr, &args->seq_args, &hdr);
2875 encode_reclaim_complete(xdr, args, &hdr);
2876 encode_nops(&hdr);
2877 }
2878
2879 /*
2880 * Encode GETDEVICEINFO request
2881 */
2882 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2883 struct xdr_stream *xdr,
2884 struct nfs4_getdeviceinfo_args *args)
2885 {
2886 struct compound_hdr hdr = {
2887 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2888 };
2889
2890 encode_compound_hdr(xdr, req, &hdr);
2891 encode_sequence(xdr, &args->seq_args, &hdr);
2892 encode_getdeviceinfo(xdr, args, &hdr);
2893
2894 /* set up reply kvec. Subtract notification bitmap max size (2)
2895 * so that notification bitmap is put in xdr_buf tail */
2896 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2897 args->pdev->pages, args->pdev->pgbase,
2898 args->pdev->pglen);
2899
2900 encode_nops(&hdr);
2901 }
2902
2903 /*
2904 * Encode LAYOUTGET request
2905 */
2906 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2907 struct xdr_stream *xdr,
2908 struct nfs4_layoutget_args *args)
2909 {
2910 struct compound_hdr hdr = {
2911 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2912 };
2913
2914 encode_compound_hdr(xdr, req, &hdr);
2915 encode_sequence(xdr, &args->seq_args, &hdr);
2916 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2917 encode_layoutget(xdr, args, &hdr);
2918
2919 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2920 args->layout.pages, 0, args->layout.pglen);
2921
2922 encode_nops(&hdr);
2923 }
2924
2925 /*
2926 * Encode LAYOUTCOMMIT request
2927 */
2928 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2929 struct xdr_stream *xdr,
2930 struct nfs4_layoutcommit_args *args)
2931 {
2932 struct nfs4_layoutcommit_data *data =
2933 container_of(args, struct nfs4_layoutcommit_data, args);
2934 struct compound_hdr hdr = {
2935 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2936 };
2937
2938 encode_compound_hdr(xdr, req, &hdr);
2939 encode_sequence(xdr, &args->seq_args, &hdr);
2940 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2941 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2942 encode_getfattr(xdr, args->bitmask, &hdr);
2943 encode_nops(&hdr);
2944 }
2945
2946 /*
2947 * Encode LAYOUTRETURN request
2948 */
2949 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2950 struct xdr_stream *xdr,
2951 struct nfs4_layoutreturn_args *args)
2952 {
2953 struct compound_hdr hdr = {
2954 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2955 };
2956
2957 encode_compound_hdr(xdr, req, &hdr);
2958 encode_sequence(xdr, &args->seq_args, &hdr);
2959 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2960 encode_layoutreturn(xdr, args, &hdr);
2961 encode_nops(&hdr);
2962 }
2963
2964 /*
2965 * Encode SECINFO_NO_NAME request
2966 */
2967 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2968 struct xdr_stream *xdr,
2969 struct nfs41_secinfo_no_name_args *args)
2970 {
2971 struct compound_hdr hdr = {
2972 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2973 };
2974
2975 encode_compound_hdr(xdr, req, &hdr);
2976 encode_sequence(xdr, &args->seq_args, &hdr);
2977 encode_putrootfh(xdr, &hdr);
2978 encode_secinfo_no_name(xdr, args, &hdr);
2979 encode_nops(&hdr);
2980 return 0;
2981 }
2982
2983 /*
2984 * Encode TEST_STATEID request
2985 */
2986 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2987 struct xdr_stream *xdr,
2988 struct nfs41_test_stateid_args *args)
2989 {
2990 struct compound_hdr hdr = {
2991 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2992 };
2993
2994 encode_compound_hdr(xdr, req, &hdr);
2995 encode_sequence(xdr, &args->seq_args, &hdr);
2996 encode_test_stateid(xdr, args, &hdr);
2997 encode_nops(&hdr);
2998 }
2999
3000 /*
3001 * Encode FREE_STATEID request
3002 */
3003 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3004 struct xdr_stream *xdr,
3005 struct nfs41_free_stateid_args *args)
3006 {
3007 struct compound_hdr hdr = {
3008 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3009 };
3010
3011 encode_compound_hdr(xdr, req, &hdr);
3012 encode_sequence(xdr, &args->seq_args, &hdr);
3013 encode_free_stateid(xdr, args, &hdr);
3014 encode_nops(&hdr);
3015 }
3016 #endif /* CONFIG_NFS_V4_1 */
3017
3018 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3019 {
3020 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3021 "Remaining buffer length is %tu words.\n",
3022 func, xdr->end - xdr->p);
3023 }
3024
3025 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3026 {
3027 __be32 *p;
3028
3029 p = xdr_inline_decode(xdr, 4);
3030 if (unlikely(!p))
3031 goto out_overflow;
3032 *len = be32_to_cpup(p);
3033 p = xdr_inline_decode(xdr, *len);
3034 if (unlikely(!p))
3035 goto out_overflow;
3036 *string = (char *)p;
3037 return 0;
3038 out_overflow:
3039 print_overflow_msg(__func__, xdr);
3040 return -EIO;
3041 }
3042
3043 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3044 {
3045 __be32 *p;
3046
3047 p = xdr_inline_decode(xdr, 8);
3048 if (unlikely(!p))
3049 goto out_overflow;
3050 hdr->status = be32_to_cpup(p++);
3051 hdr->taglen = be32_to_cpup(p);
3052
3053 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3054 if (unlikely(!p))
3055 goto out_overflow;
3056 hdr->tag = (char *)p;
3057 p += XDR_QUADLEN(hdr->taglen);
3058 hdr->nops = be32_to_cpup(p);
3059 if (unlikely(hdr->nops < 1))
3060 return nfs4_stat_to_errno(hdr->status);
3061 return 0;
3062 out_overflow:
3063 print_overflow_msg(__func__, xdr);
3064 return -EIO;
3065 }
3066
3067 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3068 int *nfs_retval)
3069 {
3070 __be32 *p;
3071 uint32_t opnum;
3072 int32_t nfserr;
3073
3074 p = xdr_inline_decode(xdr, 8);
3075 if (unlikely(!p))
3076 goto out_overflow;
3077 opnum = be32_to_cpup(p++);
3078 if (unlikely(opnum != expected))
3079 goto out_bad_operation;
3080 nfserr = be32_to_cpup(p);
3081 if (nfserr == NFS_OK)
3082 *nfs_retval = 0;
3083 else
3084 *nfs_retval = nfs4_stat_to_errno(nfserr);
3085 return true;
3086 out_bad_operation:
3087 dprintk("nfs: Server returned operation"
3088 " %d but we issued a request for %d\n",
3089 opnum, expected);
3090 *nfs_retval = -EREMOTEIO;
3091 return false;
3092 out_overflow:
3093 print_overflow_msg(__func__, xdr);
3094 *nfs_retval = -EIO;
3095 return false;
3096 }
3097
3098 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3099 {
3100 int retval;
3101
3102 __decode_op_hdr(xdr, expected, &retval);
3103 return retval;
3104 }
3105
3106 /* Dummy routine */
3107 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3108 {
3109 __be32 *p;
3110 unsigned int strlen;
3111 char *str;
3112
3113 p = xdr_inline_decode(xdr, 12);
3114 if (likely(p))
3115 return decode_opaque_inline(xdr, &strlen, &str);
3116 print_overflow_msg(__func__, xdr);
3117 return -EIO;
3118 }
3119
3120 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3121 {
3122 uint32_t bmlen;
3123 __be32 *p;
3124
3125 p = xdr_inline_decode(xdr, 4);
3126 if (unlikely(!p))
3127 goto out_overflow;
3128 bmlen = be32_to_cpup(p);
3129
3130 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3131 p = xdr_inline_decode(xdr, (bmlen << 2));
3132 if (unlikely(!p))
3133 goto out_overflow;
3134 if (bmlen > 0) {
3135 bitmap[0] = be32_to_cpup(p++);
3136 if (bmlen > 1) {
3137 bitmap[1] = be32_to_cpup(p++);
3138 if (bmlen > 2)
3139 bitmap[2] = be32_to_cpup(p);
3140 }
3141 }
3142 return 0;
3143 out_overflow:
3144 print_overflow_msg(__func__, xdr);
3145 return -EIO;
3146 }
3147
3148 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3149 {
3150 __be32 *p;
3151
3152 p = xdr_inline_decode(xdr, 4);
3153 if (unlikely(!p))
3154 goto out_overflow;
3155 *attrlen = be32_to_cpup(p);
3156 *savep = xdr_stream_pos(xdr);
3157 return 0;
3158 out_overflow:
3159 print_overflow_msg(__func__, xdr);
3160 return -EIO;
3161 }
3162
3163 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3164 {
3165 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3166 int ret;
3167 ret = decode_attr_bitmap(xdr, bitmask);
3168 if (unlikely(ret < 0))
3169 return ret;
3170 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3171 } else
3172 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3173 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3174 bitmask[0], bitmask[1], bitmask[2]);
3175 return 0;
3176 }
3177
3178 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3179 {
3180 __be32 *p;
3181 int ret = 0;
3182
3183 *type = 0;
3184 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3185 return -EIO;
3186 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3187 p = xdr_inline_decode(xdr, 4);
3188 if (unlikely(!p))
3189 goto out_overflow;
3190 *type = be32_to_cpup(p);
3191 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3192 dprintk("%s: bad type %d\n", __func__, *type);
3193 return -EIO;
3194 }
3195 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3196 ret = NFS_ATTR_FATTR_TYPE;
3197 }
3198 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3199 return ret;
3200 out_overflow:
3201 print_overflow_msg(__func__, xdr);
3202 return -EIO;
3203 }
3204
3205 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3206 uint32_t *bitmap, uint32_t *type)
3207 {
3208 __be32 *p;
3209
3210 *type = 0;
3211 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3212 return -EIO;
3213 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3214 p = xdr_inline_decode(xdr, 4);
3215 if (unlikely(!p))
3216 goto out_overflow;
3217 *type = be32_to_cpup(p);
3218 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3219 }
3220 dprintk("%s: expire type=0x%x\n", __func__, *type);
3221 return 0;
3222 out_overflow:
3223 print_overflow_msg(__func__, xdr);
3224 return -EIO;
3225 }
3226
3227 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3228 {
3229 __be32 *p;
3230 int ret = 0;
3231
3232 *change = 0;
3233 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3234 return -EIO;
3235 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3236 p = xdr_inline_decode(xdr, 8);
3237 if (unlikely(!p))
3238 goto out_overflow;
3239 xdr_decode_hyper(p, change);
3240 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3241 ret = NFS_ATTR_FATTR_CHANGE;
3242 }
3243 dprintk("%s: change attribute=%Lu\n", __func__,
3244 (unsigned long long)*change);
3245 return ret;
3246 out_overflow:
3247 print_overflow_msg(__func__, xdr);
3248 return -EIO;
3249 }
3250
3251 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3252 {
3253 __be32 *p;
3254 int ret = 0;
3255
3256 *size = 0;
3257 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3258 return -EIO;
3259 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3260 p = xdr_inline_decode(xdr, 8);
3261 if (unlikely(!p))
3262 goto out_overflow;
3263 xdr_decode_hyper(p, size);
3264 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3265 ret = NFS_ATTR_FATTR_SIZE;
3266 }
3267 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3268 return ret;
3269 out_overflow:
3270 print_overflow_msg(__func__, xdr);
3271 return -EIO;
3272 }
3273
3274 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3275 {
3276 __be32 *p;
3277
3278 *res = 0;
3279 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3280 return -EIO;
3281 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3282 p = xdr_inline_decode(xdr, 4);
3283 if (unlikely(!p))
3284 goto out_overflow;
3285 *res = be32_to_cpup(p);
3286 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3287 }
3288 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3289 return 0;
3290 out_overflow:
3291 print_overflow_msg(__func__, xdr);
3292 return -EIO;
3293 }
3294
3295 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3296 {
3297 __be32 *p;
3298
3299 *res = 0;
3300 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3301 return -EIO;
3302 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3303 p = xdr_inline_decode(xdr, 4);
3304 if (unlikely(!p))
3305 goto out_overflow;
3306 *res = be32_to_cpup(p);
3307 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3308 }
3309 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3310 return 0;
3311 out_overflow:
3312 print_overflow_msg(__func__, xdr);
3313 return -EIO;
3314 }
3315
3316 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3317 {
3318 __be32 *p;
3319 int ret = 0;
3320
3321 fsid->major = 0;
3322 fsid->minor = 0;
3323 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3324 return -EIO;
3325 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3326 p = xdr_inline_decode(xdr, 16);
3327 if (unlikely(!p))
3328 goto out_overflow;
3329 p = xdr_decode_hyper(p, &fsid->major);
3330 xdr_decode_hyper(p, &fsid->minor);
3331 bitmap[0] &= ~FATTR4_WORD0_FSID;
3332 ret = NFS_ATTR_FATTR_FSID;
3333 }
3334 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3335 (unsigned long long)fsid->major,
3336 (unsigned long long)fsid->minor);
3337 return ret;
3338 out_overflow:
3339 print_overflow_msg(__func__, xdr);
3340 return -EIO;
3341 }
3342
3343 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3344 {
3345 __be32 *p;
3346
3347 *res = 60;
3348 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3349 return -EIO;
3350 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3351 p = xdr_inline_decode(xdr, 4);
3352 if (unlikely(!p))
3353 goto out_overflow;
3354 *res = be32_to_cpup(p);
3355 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3356 }
3357 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3358 return 0;
3359 out_overflow:
3360 print_overflow_msg(__func__, xdr);
3361 return -EIO;
3362 }
3363
3364 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3365 {
3366 __be32 *p;
3367
3368 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3369 return -EIO;
3370 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3371 p = xdr_inline_decode(xdr, 4);
3372 if (unlikely(!p))
3373 goto out_overflow;
3374 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3375 *res = -be32_to_cpup(p);
3376 }
3377 return 0;
3378 out_overflow:
3379 print_overflow_msg(__func__, xdr);
3380 return -EIO;
3381 }
3382
3383 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3384 {
3385 __be32 *p;
3386 int len;
3387
3388 if (fh != NULL)
3389 memset(fh, 0, sizeof(*fh));
3390
3391 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3392 return -EIO;
3393 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3394 p = xdr_inline_decode(xdr, 4);
3395 if (unlikely(!p))
3396 goto out_overflow;
3397 len = be32_to_cpup(p);
3398 if (len > NFS4_FHSIZE)
3399 return -EIO;
3400 p = xdr_inline_decode(xdr, len);
3401 if (unlikely(!p))
3402 goto out_overflow;
3403 if (fh != NULL) {
3404 memcpy(fh->data, p, len);
3405 fh->size = len;
3406 }
3407 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3408 }
3409 return 0;
3410 out_overflow:
3411 print_overflow_msg(__func__, xdr);
3412 return -EIO;
3413 }
3414
3415 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3416 {
3417 __be32 *p;
3418
3419 *res = 0;
3420 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3421 return -EIO;
3422 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3423 p = xdr_inline_decode(xdr, 4);
3424 if (unlikely(!p))
3425 goto out_overflow;
3426 *res = be32_to_cpup(p);
3427 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3428 }
3429 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3430 return 0;
3431 out_overflow:
3432 print_overflow_msg(__func__, xdr);
3433 return -EIO;
3434 }
3435
3436 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3437 {
3438 __be32 *p;
3439 int ret = 0;
3440
3441 *fileid = 0;
3442 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3443 return -EIO;
3444 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3445 p = xdr_inline_decode(xdr, 8);
3446 if (unlikely(!p))
3447 goto out_overflow;
3448 xdr_decode_hyper(p, fileid);
3449 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3450 ret = NFS_ATTR_FATTR_FILEID;
3451 }
3452 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3453 return ret;
3454 out_overflow:
3455 print_overflow_msg(__func__, xdr);
3456 return -EIO;
3457 }
3458
3459 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3460 {
3461 __be32 *p;
3462 int ret = 0;
3463
3464 *fileid = 0;
3465 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3466 return -EIO;
3467 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3468 p = xdr_inline_decode(xdr, 8);
3469 if (unlikely(!p))
3470 goto out_overflow;
3471 xdr_decode_hyper(p, fileid);
3472 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3473 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3474 }
3475 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3476 return ret;
3477 out_overflow:
3478 print_overflow_msg(__func__, xdr);
3479 return -EIO;
3480 }
3481
3482 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3483 {
3484 __be32 *p;
3485 int status = 0;
3486
3487 *res = 0;
3488 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3489 return -EIO;
3490 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3491 p = xdr_inline_decode(xdr, 8);
3492 if (unlikely(!p))
3493 goto out_overflow;
3494 xdr_decode_hyper(p, res);
3495 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3496 }
3497 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3498 return status;
3499 out_overflow:
3500 print_overflow_msg(__func__, xdr);
3501 return -EIO;
3502 }
3503
3504 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3505 {
3506 __be32 *p;
3507 int status = 0;
3508
3509 *res = 0;
3510 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3511 return -EIO;
3512 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3513 p = xdr_inline_decode(xdr, 8);
3514 if (unlikely(!p))
3515 goto out_overflow;
3516 xdr_decode_hyper(p, res);
3517 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3518 }
3519 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3520 return status;
3521 out_overflow:
3522 print_overflow_msg(__func__, xdr);
3523 return -EIO;
3524 }
3525
3526 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3527 {
3528 __be32 *p;
3529 int status = 0;
3530
3531 *res = 0;
3532 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3533 return -EIO;
3534 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3535 p = xdr_inline_decode(xdr, 8);
3536 if (unlikely(!p))
3537 goto out_overflow;
3538 xdr_decode_hyper(p, res);
3539 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3540 }
3541 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3542 return status;
3543 out_overflow:
3544 print_overflow_msg(__func__, xdr);
3545 return -EIO;
3546 }
3547
3548 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3549 {
3550 u32 n;
3551 __be32 *p;
3552 int status = 0;
3553
3554 p = xdr_inline_decode(xdr, 4);
3555 if (unlikely(!p))
3556 goto out_overflow;
3557 n = be32_to_cpup(p);
3558 if (n == 0)
3559 goto root_path;
3560 dprintk("pathname4: ");
3561 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3562 dprintk("cannot parse %d components in path\n", n);
3563 goto out_eio;
3564 }
3565 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3566 struct nfs4_string *component = &path->components[path->ncomponents];
3567 status = decode_opaque_inline(xdr, &component->len, &component->data);
3568 if (unlikely(status != 0))
3569 goto out_eio;
3570 ifdebug (XDR)
3571 pr_cont("%s%.*s ",
3572 (path->ncomponents != n ? "/ " : ""),
3573 component->len, component->data);
3574 }
3575 out:
3576 return status;
3577 root_path:
3578 /* a root pathname is sent as a zero component4 */
3579 path->ncomponents = 1;
3580 path->components[0].len=0;
3581 path->components[0].data=NULL;
3582 dprintk("pathname4: /\n");
3583 goto out;
3584 out_eio:
3585 dprintk(" status %d", status);
3586 status = -EIO;
3587 goto out;
3588 out_overflow:
3589 print_overflow_msg(__func__, xdr);
3590 return -EIO;
3591 }
3592
3593 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3594 {
3595 int n;
3596 __be32 *p;
3597 int status = -EIO;
3598
3599 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3600 goto out;
3601 status = 0;
3602 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3603 goto out;
3604 status = -EIO;
3605 /* Ignore borken servers that return unrequested attrs */
3606 if (unlikely(res == NULL))
3607 goto out;
3608 dprintk("%s: fsroot:\n", __func__);
3609 status = decode_pathname(xdr, &res->fs_path);
3610 if (unlikely(status != 0))
3611 goto out;
3612 p = xdr_inline_decode(xdr, 4);
3613 if (unlikely(!p))
3614 goto out_overflow;
3615 n = be32_to_cpup(p);
3616 if (n <= 0)
3617 goto out_eio;
3618 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3619 u32 m;
3620 struct nfs4_fs_location *loc;
3621
3622 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3623 break;
3624 loc = &res->locations[res->nlocations];
3625 p = xdr_inline_decode(xdr, 4);
3626 if (unlikely(!p))
3627 goto out_overflow;
3628 m = be32_to_cpup(p);
3629
3630 dprintk("%s: servers:\n", __func__);
3631 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3632 struct nfs4_string *server;
3633
3634 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3635 unsigned int i;
3636 dprintk("%s: using first %u of %u servers "
3637 "returned for location %u\n",
3638 __func__,
3639 NFS4_FS_LOCATION_MAXSERVERS,
3640 m, res->nlocations);
3641 for (i = loc->nservers; i < m; i++) {
3642 unsigned int len;
3643 char *data;
3644 status = decode_opaque_inline(xdr, &len, &data);
3645 if (unlikely(status != 0))
3646 goto out_eio;
3647 }
3648 break;
3649 }
3650 server = &loc->servers[loc->nservers];
3651 status = decode_opaque_inline(xdr, &server->len, &server->data);
3652 if (unlikely(status != 0))
3653 goto out_eio;
3654 dprintk("%s ", server->data);
3655 }
3656 status = decode_pathname(xdr, &loc->rootpath);
3657 if (unlikely(status != 0))
3658 goto out_eio;
3659 }
3660 if (res->nlocations != 0)
3661 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3662 out:
3663 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3664 return status;
3665 out_overflow:
3666 print_overflow_msg(__func__, xdr);
3667 out_eio:
3668 status = -EIO;
3669 goto out;
3670 }
3671
3672 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3673 {
3674 __be32 *p;
3675 int status = 0;
3676
3677 *res = 0;
3678 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3679 return -EIO;
3680 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3681 p = xdr_inline_decode(xdr, 8);
3682 if (unlikely(!p))
3683 goto out_overflow;
3684 xdr_decode_hyper(p, res);
3685 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3686 }
3687 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3688 return status;
3689 out_overflow:
3690 print_overflow_msg(__func__, xdr);
3691 return -EIO;
3692 }
3693
3694 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3695 {
3696 __be32 *p;
3697 int status = 0;
3698
3699 *maxlink = 1;
3700 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3701 return -EIO;
3702 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3703 p = xdr_inline_decode(xdr, 4);
3704 if (unlikely(!p))
3705 goto out_overflow;
3706 *maxlink = be32_to_cpup(p);
3707 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3708 }
3709 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3710 return status;
3711 out_overflow:
3712 print_overflow_msg(__func__, xdr);
3713 return -EIO;
3714 }
3715
3716 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3717 {
3718 __be32 *p;
3719 int status = 0;
3720
3721 *maxname = 1024;
3722 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3723 return -EIO;
3724 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3725 p = xdr_inline_decode(xdr, 4);
3726 if (unlikely(!p))
3727 goto out_overflow;
3728 *maxname = be32_to_cpup(p);
3729 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3730 }
3731 dprintk("%s: maxname=%u\n", __func__, *maxname);
3732 return status;
3733 out_overflow:
3734 print_overflow_msg(__func__, xdr);
3735 return -EIO;
3736 }
3737
3738 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3739 {
3740 __be32 *p;
3741 int status = 0;
3742
3743 *res = 1024;
3744 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3745 return -EIO;
3746 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3747 uint64_t maxread;
3748 p = xdr_inline_decode(xdr, 8);
3749 if (unlikely(!p))
3750 goto out_overflow;
3751 xdr_decode_hyper(p, &maxread);
3752 if (maxread > 0x7FFFFFFF)
3753 maxread = 0x7FFFFFFF;
3754 *res = (uint32_t)maxread;
3755 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3756 }
3757 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3758 return status;
3759 out_overflow:
3760 print_overflow_msg(__func__, xdr);
3761 return -EIO;
3762 }
3763
3764 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3765 {
3766 __be32 *p;
3767 int status = 0;
3768
3769 *res = 1024;
3770 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3771 return -EIO;
3772 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3773 uint64_t maxwrite;
3774 p = xdr_inline_decode(xdr, 8);
3775 if (unlikely(!p))
3776 goto out_overflow;
3777 xdr_decode_hyper(p, &maxwrite);
3778 if (maxwrite > 0x7FFFFFFF)
3779 maxwrite = 0x7FFFFFFF;
3780 *res = (uint32_t)maxwrite;
3781 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3782 }
3783 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3784 return status;
3785 out_overflow:
3786 print_overflow_msg(__func__, xdr);
3787 return -EIO;
3788 }
3789
3790 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3791 {
3792 uint32_t tmp;
3793 __be32 *p;
3794 int ret = 0;
3795
3796 *mode = 0;
3797 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3798 return -EIO;
3799 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3800 p = xdr_inline_decode(xdr, 4);
3801 if (unlikely(!p))
3802 goto out_overflow;
3803 tmp = be32_to_cpup(p);
3804 *mode = tmp & ~S_IFMT;
3805 bitmap[1] &= ~FATTR4_WORD1_MODE;
3806 ret = NFS_ATTR_FATTR_MODE;
3807 }
3808 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3809 return ret;
3810 out_overflow:
3811 print_overflow_msg(__func__, xdr);
3812 return -EIO;
3813 }
3814
3815 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3816 {
3817 __be32 *p;
3818 int ret = 0;
3819
3820 *nlink = 1;
3821 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3822 return -EIO;
3823 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3824 p = xdr_inline_decode(xdr, 4);
3825 if (unlikely(!p))
3826 goto out_overflow;
3827 *nlink = be32_to_cpup(p);
3828 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3829 ret = NFS_ATTR_FATTR_NLINK;
3830 }
3831 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3832 return ret;
3833 out_overflow:
3834 print_overflow_msg(__func__, xdr);
3835 return -EIO;
3836 }
3837
3838 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3839 const struct nfs_server *server, kuid_t *uid,
3840 struct nfs4_string *owner_name)
3841 {
3842 uint32_t len;
3843 __be32 *p;
3844 int ret = 0;
3845
3846 *uid = make_kuid(&init_user_ns, -2);
3847 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3848 return -EIO;
3849 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3850 p = xdr_inline_decode(xdr, 4);
3851 if (unlikely(!p))
3852 goto out_overflow;
3853 len = be32_to_cpup(p);
3854 p = xdr_inline_decode(xdr, len);
3855 if (unlikely(!p))
3856 goto out_overflow;
3857 if (owner_name != NULL) {
3858 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3859 if (owner_name->data != NULL) {
3860 owner_name->len = len;
3861 ret = NFS_ATTR_FATTR_OWNER_NAME;
3862 }
3863 } else if (len < XDR_MAX_NETOBJ) {
3864 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3865 ret = NFS_ATTR_FATTR_OWNER;
3866 else
3867 dprintk("%s: nfs_map_name_to_uid failed!\n",
3868 __func__);
3869 } else
3870 dprintk("%s: name too long (%u)!\n",
3871 __func__, len);
3872 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3873 }
3874 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3875 return ret;
3876 out_overflow:
3877 print_overflow_msg(__func__, xdr);
3878 return -EIO;
3879 }
3880
3881 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3882 const struct nfs_server *server, kgid_t *gid,
3883 struct nfs4_string *group_name)
3884 {
3885 uint32_t len;
3886 __be32 *p;
3887 int ret = 0;
3888
3889 *gid = make_kgid(&init_user_ns, -2);
3890 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3891 return -EIO;
3892 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3893 p = xdr_inline_decode(xdr, 4);
3894 if (unlikely(!p))
3895 goto out_overflow;
3896 len = be32_to_cpup(p);
3897 p = xdr_inline_decode(xdr, len);
3898 if (unlikely(!p))
3899 goto out_overflow;
3900 if (group_name != NULL) {
3901 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3902 if (group_name->data != NULL) {
3903 group_name->len = len;
3904 ret = NFS_ATTR_FATTR_GROUP_NAME;
3905 }
3906 } else if (len < XDR_MAX_NETOBJ) {
3907 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3908 ret = NFS_ATTR_FATTR_GROUP;
3909 else
3910 dprintk("%s: nfs_map_group_to_gid failed!\n",
3911 __func__);
3912 } else
3913 dprintk("%s: name too long (%u)!\n",
3914 __func__, len);
3915 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3916 }
3917 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3918 return ret;
3919 out_overflow:
3920 print_overflow_msg(__func__, xdr);
3921 return -EIO;
3922 }
3923
3924 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3925 {
3926 uint32_t major = 0, minor = 0;
3927 __be32 *p;
3928 int ret = 0;
3929
3930 *rdev = MKDEV(0,0);
3931 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3932 return -EIO;
3933 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3934 dev_t tmp;
3935
3936 p = xdr_inline_decode(xdr, 8);
3937 if (unlikely(!p))
3938 goto out_overflow;
3939 major = be32_to_cpup(p++);
3940 minor = be32_to_cpup(p);
3941 tmp = MKDEV(major, minor);
3942 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3943 *rdev = tmp;
3944 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3945 ret = NFS_ATTR_FATTR_RDEV;
3946 }
3947 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3948 return ret;
3949 out_overflow:
3950 print_overflow_msg(__func__, xdr);
3951 return -EIO;
3952 }
3953
3954 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3955 {
3956 __be32 *p;
3957 int status = 0;
3958
3959 *res = 0;
3960 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3961 return -EIO;
3962 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3963 p = xdr_inline_decode(xdr, 8);
3964 if (unlikely(!p))
3965 goto out_overflow;
3966 xdr_decode_hyper(p, res);
3967 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3968 }
3969 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3970 return status;
3971 out_overflow:
3972 print_overflow_msg(__func__, xdr);
3973 return -EIO;
3974 }
3975
3976 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3977 {
3978 __be32 *p;
3979 int status = 0;
3980
3981 *res = 0;
3982 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3983 return -EIO;
3984 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3985 p = xdr_inline_decode(xdr, 8);
3986 if (unlikely(!p))
3987 goto out_overflow;
3988 xdr_decode_hyper(p, res);
3989 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3990 }
3991 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3992 return status;
3993 out_overflow:
3994 print_overflow_msg(__func__, xdr);
3995 return -EIO;
3996 }
3997
3998 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3999 {
4000 __be32 *p;
4001 int status = 0;
4002
4003 *res = 0;
4004 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4005 return -EIO;
4006 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4007 p = xdr_inline_decode(xdr, 8);
4008 if (unlikely(!p))
4009 goto out_overflow;
4010 xdr_decode_hyper(p, res);
4011 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4012 }
4013 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4014 return status;
4015 out_overflow:
4016 print_overflow_msg(__func__, xdr);
4017 return -EIO;
4018 }
4019
4020 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4021 {
4022 __be32 *p;
4023 int ret = 0;
4024
4025 *used = 0;
4026 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4027 return -EIO;
4028 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4029 p = xdr_inline_decode(xdr, 8);
4030 if (unlikely(!p))
4031 goto out_overflow;
4032 xdr_decode_hyper(p, used);
4033 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4034 ret = NFS_ATTR_FATTR_SPACE_USED;
4035 }
4036 dprintk("%s: space used=%Lu\n", __func__,
4037 (unsigned long long)*used);
4038 return ret;
4039 out_overflow:
4040 print_overflow_msg(__func__, xdr);
4041 return -EIO;
4042 }
4043
4044 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4045 {
4046 __be32 *p;
4047 uint64_t sec;
4048 uint32_t nsec;
4049
4050 p = xdr_inline_decode(xdr, 12);
4051 if (unlikely(!p))
4052 goto out_overflow;
4053 p = xdr_decode_hyper(p, &sec);
4054 nsec = be32_to_cpup(p);
4055 time->tv_sec = (time_t)sec;
4056 time->tv_nsec = (long)nsec;
4057 return 0;
4058 out_overflow:
4059 print_overflow_msg(__func__, xdr);
4060 return -EIO;
4061 }
4062
4063 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4064 {
4065 int status = 0;
4066
4067 time->tv_sec = 0;
4068 time->tv_nsec = 0;
4069 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4070 return -EIO;
4071 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4072 status = decode_attr_time(xdr, time);
4073 if (status == 0)
4074 status = NFS_ATTR_FATTR_ATIME;
4075 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4076 }
4077 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4078 return status;
4079 }
4080
4081 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4082 {
4083 int status = 0;
4084
4085 time->tv_sec = 0;
4086 time->tv_nsec = 0;
4087 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4088 return -EIO;
4089 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4090 status = decode_attr_time(xdr, time);
4091 if (status == 0)
4092 status = NFS_ATTR_FATTR_CTIME;
4093 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4094 }
4095 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4096 return status;
4097 }
4098
4099 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4100 struct timespec *time)
4101 {
4102 int status = 0;
4103
4104 time->tv_sec = 0;
4105 time->tv_nsec = 0;
4106 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4107 return -EIO;
4108 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4109 status = decode_attr_time(xdr, time);
4110 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4111 }
4112 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4113 (long)time->tv_nsec);
4114 return status;
4115 }
4116
4117 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4118 struct nfs4_label *label)
4119 {
4120 uint32_t pi = 0;
4121 uint32_t lfs = 0;
4122 __u32 len;
4123 __be32 *p;
4124 int status = 0;
4125
4126 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4127 return -EIO;
4128 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4129 p = xdr_inline_decode(xdr, 4);
4130 if (unlikely(!p))
4131 goto out_overflow;
4132 lfs = be32_to_cpup(p++);
4133 p = xdr_inline_decode(xdr, 4);
4134 if (unlikely(!p))
4135 goto out_overflow;
4136 pi = be32_to_cpup(p++);
4137 p = xdr_inline_decode(xdr, 4);
4138 if (unlikely(!p))
4139 goto out_overflow;
4140 len = be32_to_cpup(p++);
4141 p = xdr_inline_decode(xdr, len);
4142 if (unlikely(!p))
4143 goto out_overflow;
4144 if (len < NFS4_MAXLABELLEN) {
4145 if (label) {
4146 memcpy(label->label, p, len);
4147 label->len = len;
4148 label->pi = pi;
4149 label->lfs = lfs;
4150 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4151 }
4152 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4153 } else
4154 printk(KERN_WARNING "%s: label too long (%u)!\n",
4155 __func__, len);
4156 }
4157 if (label && label->label)
4158 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4159 (char *)label->label, label->len, label->pi, label->lfs);
4160 return status;
4161
4162 out_overflow:
4163 print_overflow_msg(__func__, xdr);
4164 return -EIO;
4165 }
4166
4167 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4168 {
4169 int status = 0;
4170
4171 time->tv_sec = 0;
4172 time->tv_nsec = 0;
4173 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4174 return -EIO;
4175 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4176 status = decode_attr_time(xdr, time);
4177 if (status == 0)
4178 status = NFS_ATTR_FATTR_MTIME;
4179 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4180 }
4181 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4182 return status;
4183 }
4184
4185 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4186 {
4187 unsigned int attrwords = XDR_QUADLEN(attrlen);
4188 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4189
4190 if (unlikely(attrwords != nwords)) {
4191 dprintk("%s: server returned incorrect attribute length: "
4192 "%u %c %u\n",
4193 __func__,
4194 attrwords << 2,
4195 (attrwords < nwords) ? '<' : '>',
4196 nwords << 2);
4197 return -EIO;
4198 }
4199 return 0;
4200 }
4201
4202 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4203 {
4204 __be32 *p;
4205
4206 p = xdr_inline_decode(xdr, 20);
4207 if (unlikely(!p))
4208 goto out_overflow;
4209 cinfo->atomic = be32_to_cpup(p++);
4210 p = xdr_decode_hyper(p, &cinfo->before);
4211 xdr_decode_hyper(p, &cinfo->after);
4212 return 0;
4213 out_overflow:
4214 print_overflow_msg(__func__, xdr);
4215 return -EIO;
4216 }
4217
4218 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4219 {
4220 __be32 *p;
4221 uint32_t supp, acc;
4222 int status;
4223
4224 status = decode_op_hdr(xdr, OP_ACCESS);
4225 if (status)
4226 return status;
4227 p = xdr_inline_decode(xdr, 8);
4228 if (unlikely(!p))
4229 goto out_overflow;
4230 supp = be32_to_cpup(p++);
4231 acc = be32_to_cpup(p);
4232 *supported = supp;
4233 *access = acc;
4234 return 0;
4235 out_overflow:
4236 print_overflow_msg(__func__, xdr);
4237 return -EIO;
4238 }
4239
4240 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4241 {
4242 __be32 *p;
4243
4244 p = xdr_inline_decode(xdr, len);
4245 if (likely(p)) {
4246 memcpy(buf, p, len);
4247 return 0;
4248 }
4249 print_overflow_msg(__func__, xdr);
4250 return -EIO;
4251 }
4252
4253 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4254 {
4255 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4256 }
4257
4258 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4259 {
4260 int status;
4261
4262 status = decode_op_hdr(xdr, OP_CLOSE);
4263 if (status != -EIO)
4264 nfs_increment_open_seqid(status, res->seqid);
4265 if (!status)
4266 status = decode_stateid(xdr, &res->stateid);
4267 return status;
4268 }
4269
4270 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4271 {
4272 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4273 }
4274
4275 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4276 {
4277 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4278 }
4279
4280 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4281 {
4282 int status;
4283
4284 status = decode_op_hdr(xdr, OP_COMMIT);
4285 if (!status)
4286 status = decode_write_verifier(xdr, &res->verf->verifier);
4287 return status;
4288 }
4289
4290 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4291 {
4292 __be32 *p;
4293 uint32_t bmlen;
4294 int status;
4295
4296 status = decode_op_hdr(xdr, OP_CREATE);
4297 if (status)
4298 return status;
4299 if ((status = decode_change_info(xdr, cinfo)))
4300 return status;
4301 p = xdr_inline_decode(xdr, 4);
4302 if (unlikely(!p))
4303 goto out_overflow;
4304 bmlen = be32_to_cpup(p);
4305 p = xdr_inline_decode(xdr, bmlen << 2);
4306 if (likely(p))
4307 return 0;
4308 out_overflow:
4309 print_overflow_msg(__func__, xdr);
4310 return -EIO;
4311 }
4312
4313 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4314 {
4315 unsigned int savep;
4316 uint32_t attrlen, bitmap[3] = {0};
4317 int status;
4318
4319 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4320 goto xdr_error;
4321 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4322 goto xdr_error;
4323 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4324 goto xdr_error;
4325 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4326 goto xdr_error;
4327 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4328 &res->fh_expire_type)) != 0)
4329 goto xdr_error;
4330 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4331 goto xdr_error;
4332 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4333 goto xdr_error;
4334 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4335 goto xdr_error;
4336 status = verify_attr_len(xdr, savep, attrlen);
4337 xdr_error:
4338 dprintk("%s: xdr returned %d!\n", __func__, -status);
4339 return status;
4340 }
4341
4342 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4343 {
4344 unsigned int savep;
4345 uint32_t attrlen, bitmap[3] = {0};
4346 int status;
4347
4348 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4349 goto xdr_error;
4350 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4351 goto xdr_error;
4352 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4353 goto xdr_error;
4354
4355 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4356 goto xdr_error;
4357 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4360 goto xdr_error;
4361 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4362 goto xdr_error;
4363 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4366 goto xdr_error;
4367
4368 status = verify_attr_len(xdr, savep, attrlen);
4369 xdr_error:
4370 dprintk("%s: xdr returned %d!\n", __func__, -status);
4371 return status;
4372 }
4373
4374 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4375 {
4376 unsigned int savep;
4377 uint32_t attrlen, bitmap[3] = {0};
4378 int status;
4379
4380 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4381 goto xdr_error;
4382 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4385 goto xdr_error;
4386
4387 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4388 goto xdr_error;
4389 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4390 goto xdr_error;
4391
4392 status = verify_attr_len(xdr, savep, attrlen);
4393 xdr_error:
4394 dprintk("%s: xdr returned %d!\n", __func__, -status);
4395 return status;
4396 }
4397
4398 static int decode_threshold_hint(struct xdr_stream *xdr,
4399 uint32_t *bitmap,
4400 uint64_t *res,
4401 uint32_t hint_bit)
4402 {
4403 __be32 *p;
4404
4405 *res = 0;
4406 if (likely(bitmap[0] & hint_bit)) {
4407 p = xdr_inline_decode(xdr, 8);
4408 if (unlikely(!p))
4409 goto out_overflow;
4410 xdr_decode_hyper(p, res);
4411 }
4412 return 0;
4413 out_overflow:
4414 print_overflow_msg(__func__, xdr);
4415 return -EIO;
4416 }
4417
4418 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4419 struct nfs4_threshold *res)
4420 {
4421 __be32 *p;
4422 unsigned int savep;
4423 uint32_t bitmap[3] = {0,}, attrlen;
4424 int status;
4425
4426 /* layout type */
4427 p = xdr_inline_decode(xdr, 4);
4428 if (unlikely(!p)) {
4429 print_overflow_msg(__func__, xdr);
4430 return -EIO;
4431 }
4432 res->l_type = be32_to_cpup(p);
4433
4434 /* thi_hintset bitmap */
4435 status = decode_attr_bitmap(xdr, bitmap);
4436 if (status < 0)
4437 goto xdr_error;
4438
4439 /* thi_hintlist length */
4440 status = decode_attr_length(xdr, &attrlen, &savep);
4441 if (status < 0)
4442 goto xdr_error;
4443 /* thi_hintlist */
4444 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4445 if (status < 0)
4446 goto xdr_error;
4447 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4448 if (status < 0)
4449 goto xdr_error;
4450 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4451 THRESHOLD_RD_IO);
4452 if (status < 0)
4453 goto xdr_error;
4454 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4455 THRESHOLD_WR_IO);
4456 if (status < 0)
4457 goto xdr_error;
4458
4459 status = verify_attr_len(xdr, savep, attrlen);
4460 res->bm = bitmap[0];
4461
4462 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4463 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4464 res->wr_io_sz);
4465 xdr_error:
4466 dprintk("%s ret=%d!\n", __func__, status);
4467 return status;
4468 }
4469
4470 /*
4471 * Thresholds on pNFS direct I/O vrs MDS I/O
4472 */
4473 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4474 uint32_t *bitmap,
4475 struct nfs4_threshold *res)
4476 {
4477 __be32 *p;
4478 int status = 0;
4479 uint32_t num;
4480
4481 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4482 return -EIO;
4483 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4484 /* Did the server return an unrequested attribute? */
4485 if (unlikely(res == NULL))
4486 return -EREMOTEIO;
4487 p = xdr_inline_decode(xdr, 4);
4488 if (unlikely(!p))
4489 goto out_overflow;
4490 num = be32_to_cpup(p);
4491 if (num == 0)
4492 return 0;
4493 if (num > 1)
4494 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4495 "drivers per filesystem not supported\n",
4496 __func__);
4497
4498 status = decode_first_threshold_item4(xdr, res);
4499 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4500 }
4501 return status;
4502 out_overflow:
4503 print_overflow_msg(__func__, xdr);
4504 return -EIO;
4505 }
4506
4507 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4508 struct nfs_fattr *fattr, struct nfs_fh *fh,
4509 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4510 const struct nfs_server *server)
4511 {
4512 int status;
4513 umode_t fmode = 0;
4514 uint32_t type;
4515 int32_t err;
4516
4517 status = decode_attr_type(xdr, bitmap, &type);
4518 if (status < 0)
4519 goto xdr_error;
4520 fattr->mode = 0;
4521 if (status != 0) {
4522 fattr->mode |= nfs_type2fmt[type];
4523 fattr->valid |= status;
4524 }
4525
4526 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4527 if (status < 0)
4528 goto xdr_error;
4529 fattr->valid |= status;
4530
4531 status = decode_attr_size(xdr, bitmap, &fattr->size);
4532 if (status < 0)
4533 goto xdr_error;
4534 fattr->valid |= status;
4535
4536 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4537 if (status < 0)
4538 goto xdr_error;
4539 fattr->valid |= status;
4540
4541 err = 0;
4542 status = decode_attr_error(xdr, bitmap, &err);
4543 if (status < 0)
4544 goto xdr_error;
4545
4546 status = decode_attr_filehandle(xdr, bitmap, fh);
4547 if (status < 0)
4548 goto xdr_error;
4549
4550 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4551 if (status < 0)
4552 goto xdr_error;
4553 fattr->valid |= status;
4554
4555 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4556 if (status < 0)
4557 goto xdr_error;
4558 fattr->valid |= status;
4559
4560 status = decode_attr_mode(xdr, bitmap, &fmode);
4561 if (status < 0)
4562 goto xdr_error;
4563 if (status != 0) {
4564 fattr->mode |= fmode;
4565 fattr->valid |= status;
4566 }
4567
4568 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4569 if (status < 0)
4570 goto xdr_error;
4571 fattr->valid |= status;
4572
4573 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4579 if (status < 0)
4580 goto xdr_error;
4581 fattr->valid |= status;
4582
4583 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4584 if (status < 0)
4585 goto xdr_error;
4586 fattr->valid |= status;
4587
4588 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4589 if (status < 0)
4590 goto xdr_error;
4591 fattr->valid |= status;
4592
4593 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4594 if (status < 0)
4595 goto xdr_error;
4596 fattr->valid |= status;
4597
4598 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4599 if (status < 0)
4600 goto xdr_error;
4601 fattr->valid |= status;
4602
4603 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4604 if (status < 0)
4605 goto xdr_error;
4606 fattr->valid |= status;
4607
4608 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4609 if (status < 0)
4610 goto xdr_error;
4611 fattr->valid |= status;
4612
4613 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4614 if (status < 0)
4615 goto xdr_error;
4616
4617 if (label) {
4618 status = decode_attr_security_label(xdr, bitmap, label);
4619 if (status < 0)
4620 goto xdr_error;
4621 fattr->valid |= status;
4622 }
4623
4624 xdr_error:
4625 dprintk("%s: xdr returned %d\n", __func__, -status);
4626 return status;
4627 }
4628
4629 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4630 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4631 struct nfs4_label *label, const struct nfs_server *server)
4632 {
4633 unsigned int savep;
4634 uint32_t attrlen,
4635 bitmap[3] = {0};
4636 int status;
4637
4638 status = decode_op_hdr(xdr, OP_GETATTR);
4639 if (status < 0)
4640 goto xdr_error;
4641
4642 status = decode_attr_bitmap(xdr, bitmap);
4643 if (status < 0)
4644 goto xdr_error;
4645
4646 status = decode_attr_length(xdr, &attrlen, &savep);
4647 if (status < 0)
4648 goto xdr_error;
4649
4650 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4651 label, server);
4652 if (status < 0)
4653 goto xdr_error;
4654
4655 status = verify_attr_len(xdr, savep, attrlen);
4656 xdr_error:
4657 dprintk("%s: xdr returned %d\n", __func__, -status);
4658 return status;
4659 }
4660
4661 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4662 struct nfs4_label *label, const struct nfs_server *server)
4663 {
4664 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4665 }
4666
4667 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4668 const struct nfs_server *server)
4669 {
4670 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4671 }
4672
4673 /*
4674 * Decode potentially multiple layout types. Currently we only support
4675 * one layout driver per file system.
4676 */
4677 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4678 uint32_t *layouttype)
4679 {
4680 __be32 *p;
4681 int num;
4682
4683 p = xdr_inline_decode(xdr, 4);
4684 if (unlikely(!p))
4685 goto out_overflow;
4686 num = be32_to_cpup(p);
4687
4688 /* pNFS is not supported by the underlying file system */
4689 if (num == 0) {
4690 *layouttype = 0;
4691 return 0;
4692 }
4693 if (num > 1)
4694 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4695 "drivers per filesystem not supported\n", __func__);
4696
4697 /* Decode and set first layout type, move xdr->p past unused types */
4698 p = xdr_inline_decode(xdr, num * 4);
4699 if (unlikely(!p))
4700 goto out_overflow;
4701 *layouttype = be32_to_cpup(p);
4702 return 0;
4703 out_overflow:
4704 print_overflow_msg(__func__, xdr);
4705 return -EIO;
4706 }
4707
4708 /*
4709 * The type of file system exported.
4710 * Note we must ensure that layouttype is set in any non-error case.
4711 */
4712 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4713 uint32_t *layouttype)
4714 {
4715 int status = 0;
4716
4717 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4718 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4719 return -EIO;
4720 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4721 status = decode_first_pnfs_layout_type(xdr, layouttype);
4722 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4723 } else
4724 *layouttype = 0;
4725 return status;
4726 }
4727
4728 /*
4729 * The prefered block size for layout directed io
4730 */
4731 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4732 uint32_t *res)
4733 {
4734 __be32 *p;
4735
4736 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4737 *res = 0;
4738 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4739 p = xdr_inline_decode(xdr, 4);
4740 if (unlikely(!p)) {
4741 print_overflow_msg(__func__, xdr);
4742 return -EIO;
4743 }
4744 *res = be32_to_cpup(p);
4745 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4746 }
4747 return 0;
4748 }
4749
4750 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4751 {
4752 unsigned int savep;
4753 uint32_t attrlen, bitmap[3];
4754 int status;
4755
4756 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4757 goto xdr_error;
4758 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4759 goto xdr_error;
4760 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4761 goto xdr_error;
4762
4763 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4764
4765 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4766 goto xdr_error;
4767 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4768 goto xdr_error;
4769 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4770 goto xdr_error;
4771 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4772 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4773 goto xdr_error;
4774 fsinfo->wtpref = fsinfo->wtmax;
4775 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4776 if (status != 0)
4777 goto xdr_error;
4778 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4779 if (status != 0)
4780 goto xdr_error;
4781 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4782 if (status)
4783 goto xdr_error;
4784
4785 status = verify_attr_len(xdr, savep, attrlen);
4786 xdr_error:
4787 dprintk("%s: xdr returned %d!\n", __func__, -status);
4788 return status;
4789 }
4790
4791 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4792 {
4793 __be32 *p;
4794 uint32_t len;
4795 int status;
4796
4797 /* Zero handle first to allow comparisons */
4798 memset(fh, 0, sizeof(*fh));
4799
4800 status = decode_op_hdr(xdr, OP_GETFH);
4801 if (status)
4802 return status;
4803
4804 p = xdr_inline_decode(xdr, 4);
4805 if (unlikely(!p))
4806 goto out_overflow;
4807 len = be32_to_cpup(p);
4808 if (len > NFS4_FHSIZE)
4809 return -EIO;
4810 fh->size = len;
4811 p = xdr_inline_decode(xdr, len);
4812 if (unlikely(!p))
4813 goto out_overflow;
4814 memcpy(fh->data, p, len);
4815 return 0;
4816 out_overflow:
4817 print_overflow_msg(__func__, xdr);
4818 return -EIO;
4819 }
4820
4821 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4822 {
4823 int status;
4824
4825 status = decode_op_hdr(xdr, OP_LINK);
4826 if (status)
4827 return status;
4828 return decode_change_info(xdr, cinfo);
4829 }
4830
4831 /*
4832 * We create the owner, so we know a proper owner.id length is 4.
4833 */
4834 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4835 {
4836 uint64_t offset, length, clientid;
4837 __be32 *p;
4838 uint32_t namelen, type;
4839
4840 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4841 if (unlikely(!p))
4842 goto out_overflow;
4843 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4844 p = xdr_decode_hyper(p, &length);
4845 type = be32_to_cpup(p++); /* 4 byte read */
4846 if (fl != NULL) { /* manipulate file lock */
4847 fl->fl_start = (loff_t)offset;
4848 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4849 if (length == ~(uint64_t)0)
4850 fl->fl_end = OFFSET_MAX;
4851 fl->fl_type = F_WRLCK;
4852 if (type & 1)
4853 fl->fl_type = F_RDLCK;
4854 fl->fl_pid = 0;
4855 }
4856 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4857 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4858 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4859 if (likely(p))
4860 return -NFS4ERR_DENIED;
4861 out_overflow:
4862 print_overflow_msg(__func__, xdr);
4863 return -EIO;
4864 }
4865
4866 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4867 {
4868 int status;
4869
4870 status = decode_op_hdr(xdr, OP_LOCK);
4871 if (status == -EIO)
4872 goto out;
4873 if (status == 0) {
4874 status = decode_stateid(xdr, &res->stateid);
4875 if (unlikely(status))
4876 goto out;
4877 } else if (status == -NFS4ERR_DENIED)
4878 status = decode_lock_denied(xdr, NULL);
4879 if (res->open_seqid != NULL)
4880 nfs_increment_open_seqid(status, res->open_seqid);
4881 nfs_increment_lock_seqid(status, res->lock_seqid);
4882 out:
4883 return status;
4884 }
4885
4886 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4887 {
4888 int status;
4889 status = decode_op_hdr(xdr, OP_LOCKT);
4890 if (status == -NFS4ERR_DENIED)
4891 return decode_lock_denied(xdr, res->denied);
4892 return status;
4893 }
4894
4895 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4896 {
4897 int status;
4898
4899 status = decode_op_hdr(xdr, OP_LOCKU);
4900 if (status != -EIO)
4901 nfs_increment_lock_seqid(status, res->seqid);
4902 if (status == 0)
4903 status = decode_stateid(xdr, &res->stateid);
4904 return status;
4905 }
4906
4907 static int decode_release_lockowner(struct xdr_stream *xdr)
4908 {
4909 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4910 }
4911
4912 static int decode_lookup(struct xdr_stream *xdr)
4913 {
4914 return decode_op_hdr(xdr, OP_LOOKUP);
4915 }
4916
4917 /* This is too sick! */
4918 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4919 {
4920 __be32 *p;
4921 uint32_t limit_type, nblocks, blocksize;
4922
4923 p = xdr_inline_decode(xdr, 12);
4924 if (unlikely(!p))
4925 goto out_overflow;
4926 limit_type = be32_to_cpup(p++);
4927 switch (limit_type) {
4928 case 1:
4929 xdr_decode_hyper(p, maxsize);
4930 break;
4931 case 2:
4932 nblocks = be32_to_cpup(p++);
4933 blocksize = be32_to_cpup(p);
4934 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4935 }
4936 return 0;
4937 out_overflow:
4938 print_overflow_msg(__func__, xdr);
4939 return -EIO;
4940 }
4941
4942 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4943 {
4944 __be32 *p;
4945 uint32_t delegation_type;
4946 int status;
4947
4948 p = xdr_inline_decode(xdr, 4);
4949 if (unlikely(!p))
4950 goto out_overflow;
4951 delegation_type = be32_to_cpup(p);
4952 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4953 res->delegation_type = 0;
4954 return 0;
4955 }
4956 status = decode_stateid(xdr, &res->delegation);
4957 if (unlikely(status))
4958 return status;
4959 p = xdr_inline_decode(xdr, 4);
4960 if (unlikely(!p))
4961 goto out_overflow;
4962 res->do_recall = be32_to_cpup(p);
4963
4964 switch (delegation_type) {
4965 case NFS4_OPEN_DELEGATE_READ:
4966 res->delegation_type = FMODE_READ;
4967 break;
4968 case NFS4_OPEN_DELEGATE_WRITE:
4969 res->delegation_type = FMODE_WRITE|FMODE_READ;
4970 if (decode_space_limit(xdr, &res->maxsize) < 0)
4971 return -EIO;
4972 }
4973 return decode_ace(xdr, NULL, res->server->nfs_client);
4974 out_overflow:
4975 print_overflow_msg(__func__, xdr);
4976 return -EIO;
4977 }
4978
4979 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4980 {
4981 __be32 *p;
4982 uint32_t savewords, bmlen, i;
4983 int status;
4984
4985 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4986 return status;
4987 nfs_increment_open_seqid(status, res->seqid);
4988 if (status)
4989 return status;
4990 status = decode_stateid(xdr, &res->stateid);
4991 if (unlikely(status))
4992 return status;
4993
4994 decode_change_info(xdr, &res->cinfo);
4995
4996 p = xdr_inline_decode(xdr, 8);
4997 if (unlikely(!p))
4998 goto out_overflow;
4999 res->rflags = be32_to_cpup(p++);
5000 bmlen = be32_to_cpup(p);
5001 if (bmlen > 10)
5002 goto xdr_error;
5003
5004 p = xdr_inline_decode(xdr, bmlen << 2);
5005 if (unlikely(!p))
5006 goto out_overflow;
5007 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5008 for (i = 0; i < savewords; ++i)
5009 res->attrset[i] = be32_to_cpup(p++);
5010 for (; i < NFS4_BITMAP_SIZE; i++)
5011 res->attrset[i] = 0;
5012
5013 return decode_delegation(xdr, res);
5014 xdr_error:
5015 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5016 return -EIO;
5017 out_overflow:
5018 print_overflow_msg(__func__, xdr);
5019 return -EIO;
5020 }
5021
5022 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5023 {
5024 int status;
5025
5026 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5027 if (status != -EIO)
5028 nfs_increment_open_seqid(status, res->seqid);
5029 if (!status)
5030 status = decode_stateid(xdr, &res->stateid);
5031 return status;
5032 }
5033
5034 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5035 {
5036 int status;
5037
5038 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5039 if (status != -EIO)
5040 nfs_increment_open_seqid(status, res->seqid);
5041 if (!status)
5042 status = decode_stateid(xdr, &res->stateid);
5043 return status;
5044 }
5045
5046 static int decode_putfh(struct xdr_stream *xdr)
5047 {
5048 return decode_op_hdr(xdr, OP_PUTFH);
5049 }
5050
5051 static int decode_putrootfh(struct xdr_stream *xdr)
5052 {
5053 return decode_op_hdr(xdr, OP_PUTROOTFH);
5054 }
5055
5056 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5057 struct nfs_pgio_res *res)
5058 {
5059 __be32 *p;
5060 uint32_t count, eof, recvd;
5061 int status;
5062
5063 status = decode_op_hdr(xdr, OP_READ);
5064 if (status)
5065 return status;
5066 p = xdr_inline_decode(xdr, 8);
5067 if (unlikely(!p))
5068 goto out_overflow;
5069 eof = be32_to_cpup(p++);
5070 count = be32_to_cpup(p);
5071 recvd = xdr_read_pages(xdr, count);
5072 if (count > recvd) {
5073 dprintk("NFS: server cheating in read reply: "
5074 "count %u > recvd %u\n", count, recvd);
5075 count = recvd;
5076 eof = 0;
5077 }
5078 res->eof = eof;
5079 res->count = count;
5080 return 0;
5081 out_overflow:
5082 print_overflow_msg(__func__, xdr);
5083 return -EIO;
5084 }
5085
5086 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5087 {
5088 int status;
5089 __be32 verf[2];
5090
5091 status = decode_op_hdr(xdr, OP_READDIR);
5092 if (!status)
5093 status = decode_verifier(xdr, readdir->verifier.data);
5094 if (unlikely(status))
5095 return status;
5096 memcpy(verf, readdir->verifier.data, sizeof(verf));
5097 dprintk("%s: verifier = %08x:%08x\n",
5098 __func__, verf[0], verf[1]);
5099 return xdr_read_pages(xdr, xdr->buf->page_len);
5100 }
5101
5102 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5103 {
5104 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5105 u32 len, recvd;
5106 __be32 *p;
5107 int status;
5108
5109 status = decode_op_hdr(xdr, OP_READLINK);
5110 if (status)
5111 return status;
5112
5113 /* Convert length of symlink */
5114 p = xdr_inline_decode(xdr, 4);
5115 if (unlikely(!p))
5116 goto out_overflow;
5117 len = be32_to_cpup(p);
5118 if (len >= rcvbuf->page_len || len <= 0) {
5119 dprintk("nfs: server returned giant symlink!\n");
5120 return -ENAMETOOLONG;
5121 }
5122 recvd = xdr_read_pages(xdr, len);
5123 if (recvd < len) {
5124 dprintk("NFS: server cheating in readlink reply: "
5125 "count %u > recvd %u\n", len, recvd);
5126 return -EIO;
5127 }
5128 /*
5129 * The XDR encode routine has set things up so that
5130 * the link text will be copied directly into the
5131 * buffer. We just have to do overflow-checking,
5132 * and and null-terminate the text (the VFS expects
5133 * null-termination).
5134 */
5135 xdr_terminate_string(rcvbuf, len);
5136 return 0;
5137 out_overflow:
5138 print_overflow_msg(__func__, xdr);
5139 return -EIO;
5140 }
5141
5142 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5143 {
5144 int status;
5145
5146 status = decode_op_hdr(xdr, OP_REMOVE);
5147 if (status)
5148 goto out;
5149 status = decode_change_info(xdr, cinfo);
5150 out:
5151 return status;
5152 }
5153
5154 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5155 struct nfs4_change_info *new_cinfo)
5156 {
5157 int status;
5158
5159 status = decode_op_hdr(xdr, OP_RENAME);
5160 if (status)
5161 goto out;
5162 if ((status = decode_change_info(xdr, old_cinfo)))
5163 goto out;
5164 status = decode_change_info(xdr, new_cinfo);
5165 out:
5166 return status;
5167 }
5168
5169 static int decode_renew(struct xdr_stream *xdr)
5170 {
5171 return decode_op_hdr(xdr, OP_RENEW);
5172 }
5173
5174 static int
5175 decode_restorefh(struct xdr_stream *xdr)
5176 {
5177 return decode_op_hdr(xdr, OP_RESTOREFH);
5178 }
5179
5180 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5181 struct nfs_getaclres *res)
5182 {
5183 unsigned int savep;
5184 uint32_t attrlen,
5185 bitmap[3] = {0};
5186 int status;
5187 unsigned int pg_offset;
5188
5189 res->acl_len = 0;
5190 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5191 goto out;
5192
5193 xdr_enter_page(xdr, xdr->buf->page_len);
5194
5195 /* Calculate the offset of the page data */
5196 pg_offset = xdr->buf->head[0].iov_len;
5197
5198 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5199 goto out;
5200 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5201 goto out;
5202
5203 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5204 return -EIO;
5205 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5206
5207 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5208 * are stored with the acl data to handle the problem of
5209 * variable length bitmaps.*/
5210 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5211 res->acl_len = attrlen;
5212
5213 /* Check for receive buffer overflow */
5214 if (res->acl_len > (xdr->nwords << 2) ||
5215 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5216 res->acl_flags |= NFS4_ACL_TRUNC;
5217 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5218 attrlen, xdr->nwords << 2);
5219 }
5220 } else
5221 status = -EOPNOTSUPP;
5222
5223 out:
5224 return status;
5225 }
5226
5227 static int
5228 decode_savefh(struct xdr_stream *xdr)
5229 {
5230 return decode_op_hdr(xdr, OP_SAVEFH);
5231 }
5232
5233 static int decode_setattr(struct xdr_stream *xdr)
5234 {
5235 __be32 *p;
5236 uint32_t bmlen;
5237 int status;
5238
5239 status = decode_op_hdr(xdr, OP_SETATTR);
5240 if (status)
5241 return status;
5242 p = xdr_inline_decode(xdr, 4);
5243 if (unlikely(!p))
5244 goto out_overflow;
5245 bmlen = be32_to_cpup(p);
5246 p = xdr_inline_decode(xdr, bmlen << 2);
5247 if (likely(p))
5248 return 0;
5249 out_overflow:
5250 print_overflow_msg(__func__, xdr);
5251 return -EIO;
5252 }
5253
5254 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5255 {
5256 __be32 *p;
5257 uint32_t opnum;
5258 int32_t nfserr;
5259
5260 p = xdr_inline_decode(xdr, 8);
5261 if (unlikely(!p))
5262 goto out_overflow;
5263 opnum = be32_to_cpup(p++);
5264 if (opnum != OP_SETCLIENTID) {
5265 dprintk("nfs: decode_setclientid: Server returned operation"
5266 " %d\n", opnum);
5267 return -EIO;
5268 }
5269 nfserr = be32_to_cpup(p);
5270 if (nfserr == NFS_OK) {
5271 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5272 if (unlikely(!p))
5273 goto out_overflow;
5274 p = xdr_decode_hyper(p, &res->clientid);
5275 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5276 } else if (nfserr == NFSERR_CLID_INUSE) {
5277 uint32_t len;
5278
5279 /* skip netid string */
5280 p = xdr_inline_decode(xdr, 4);
5281 if (unlikely(!p))
5282 goto out_overflow;
5283 len = be32_to_cpup(p);
5284 p = xdr_inline_decode(xdr, len);
5285 if (unlikely(!p))
5286 goto out_overflow;
5287
5288 /* skip uaddr string */
5289 p = xdr_inline_decode(xdr, 4);
5290 if (unlikely(!p))
5291 goto out_overflow;
5292 len = be32_to_cpup(p);
5293 p = xdr_inline_decode(xdr, len);
5294 if (unlikely(!p))
5295 goto out_overflow;
5296 return -NFSERR_CLID_INUSE;
5297 } else
5298 return nfs4_stat_to_errno(nfserr);
5299
5300 return 0;
5301 out_overflow:
5302 print_overflow_msg(__func__, xdr);
5303 return -EIO;
5304 }
5305
5306 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5307 {
5308 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5309 }
5310
5311 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5312 {
5313 __be32 *p;
5314 int status;
5315
5316 status = decode_op_hdr(xdr, OP_WRITE);
5317 if (status)
5318 return status;
5319
5320 p = xdr_inline_decode(xdr, 8);
5321 if (unlikely(!p))
5322 goto out_overflow;
5323 res->count = be32_to_cpup(p++);
5324 res->verf->committed = be32_to_cpup(p++);
5325 return decode_write_verifier(xdr, &res->verf->verifier);
5326 out_overflow:
5327 print_overflow_msg(__func__, xdr);
5328 return -EIO;
5329 }
5330
5331 static int decode_delegreturn(struct xdr_stream *xdr)
5332 {
5333 return decode_op_hdr(xdr, OP_DELEGRETURN);
5334 }
5335
5336 static int decode_secinfo_gss(struct xdr_stream *xdr,
5337 struct nfs4_secinfo4 *flavor)
5338 {
5339 u32 oid_len;
5340 __be32 *p;
5341
5342 p = xdr_inline_decode(xdr, 4);
5343 if (unlikely(!p))
5344 goto out_overflow;
5345 oid_len = be32_to_cpup(p);
5346 if (oid_len > GSS_OID_MAX_LEN)
5347 goto out_err;
5348
5349 p = xdr_inline_decode(xdr, oid_len);
5350 if (unlikely(!p))
5351 goto out_overflow;
5352 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5353 flavor->flavor_info.oid.len = oid_len;
5354
5355 p = xdr_inline_decode(xdr, 8);
5356 if (unlikely(!p))
5357 goto out_overflow;
5358 flavor->flavor_info.qop = be32_to_cpup(p++);
5359 flavor->flavor_info.service = be32_to_cpup(p);
5360
5361 return 0;
5362
5363 out_overflow:
5364 print_overflow_msg(__func__, xdr);
5365 return -EIO;
5366 out_err:
5367 return -EINVAL;
5368 }
5369
5370 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5371 {
5372 struct nfs4_secinfo4 *sec_flavor;
5373 unsigned int i, num_flavors;
5374 int status;
5375 __be32 *p;
5376
5377 p = xdr_inline_decode(xdr, 4);
5378 if (unlikely(!p))
5379 goto out_overflow;
5380
5381 res->flavors->num_flavors = 0;
5382 num_flavors = be32_to_cpup(p);
5383
5384 for (i = 0; i < num_flavors; i++) {
5385 sec_flavor = &res->flavors->flavors[i];
5386 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5387 break;
5388
5389 p = xdr_inline_decode(xdr, 4);
5390 if (unlikely(!p))
5391 goto out_overflow;
5392 sec_flavor->flavor = be32_to_cpup(p);
5393
5394 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5395 status = decode_secinfo_gss(xdr, sec_flavor);
5396 if (status)
5397 goto out;
5398 }
5399 res->flavors->num_flavors++;
5400 }
5401
5402 status = 0;
5403 out:
5404 return status;
5405 out_overflow:
5406 print_overflow_msg(__func__, xdr);
5407 return -EIO;
5408 }
5409
5410 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5411 {
5412 int status = decode_op_hdr(xdr, OP_SECINFO);
5413 if (status)
5414 return status;
5415 return decode_secinfo_common(xdr, res);
5416 }
5417
5418 #if defined(CONFIG_NFS_V4_1)
5419 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5420 {
5421 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5422 if (status)
5423 return status;
5424 return decode_secinfo_common(xdr, res);
5425 }
5426
5427 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5428 {
5429 __be32 *p;
5430 uint32_t bitmap_words;
5431 unsigned int i;
5432
5433 p = xdr_inline_decode(xdr, 4);
5434 bitmap_words = be32_to_cpup(p++);
5435 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5436 return -EIO;
5437 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5438 for (i = 0; i < bitmap_words; i++)
5439 op_map->u.words[i] = be32_to_cpup(p++);
5440
5441 return 0;
5442 }
5443
5444 static int decode_exchange_id(struct xdr_stream *xdr,
5445 struct nfs41_exchange_id_res *res)
5446 {
5447 __be32 *p;
5448 uint32_t dummy;
5449 char *dummy_str;
5450 int status;
5451 uint32_t impl_id_count;
5452
5453 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5454 if (status)
5455 return status;
5456
5457 p = xdr_inline_decode(xdr, 8);
5458 if (unlikely(!p))
5459 goto out_overflow;
5460 xdr_decode_hyper(p, &res->clientid);
5461 p = xdr_inline_decode(xdr, 12);
5462 if (unlikely(!p))
5463 goto out_overflow;
5464 res->seqid = be32_to_cpup(p++);
5465 res->flags = be32_to_cpup(p++);
5466
5467 res->state_protect.how = be32_to_cpup(p);
5468 switch (res->state_protect.how) {
5469 case SP4_NONE:
5470 break;
5471 case SP4_MACH_CRED:
5472 status = decode_op_map(xdr, &res->state_protect.enforce);
5473 if (status)
5474 return status;
5475 status = decode_op_map(xdr, &res->state_protect.allow);
5476 if (status)
5477 return status;
5478 break;
5479 default:
5480 WARN_ON_ONCE(1);
5481 return -EIO;
5482 }
5483
5484 /* server_owner4.so_minor_id */
5485 p = xdr_inline_decode(xdr, 8);
5486 if (unlikely(!p))
5487 goto out_overflow;
5488 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5489
5490 /* server_owner4.so_major_id */
5491 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5492 if (unlikely(status))
5493 return status;
5494 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5495 return -EIO;
5496 memcpy(res->server_owner->major_id, dummy_str, dummy);
5497 res->server_owner->major_id_sz = dummy;
5498
5499 /* server_scope4 */
5500 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5501 if (unlikely(status))
5502 return status;
5503 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5504 return -EIO;
5505 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5506 res->server_scope->server_scope_sz = dummy;
5507
5508 /* Implementation Id */
5509 p = xdr_inline_decode(xdr, 4);
5510 if (unlikely(!p))
5511 goto out_overflow;
5512 impl_id_count = be32_to_cpup(p++);
5513
5514 if (impl_id_count) {
5515 /* nii_domain */
5516 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5517 if (unlikely(status))
5518 return status;
5519 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5520 return -EIO;
5521 memcpy(res->impl_id->domain, dummy_str, dummy);
5522
5523 /* nii_name */
5524 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5525 if (unlikely(status))
5526 return status;
5527 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5528 return -EIO;
5529 memcpy(res->impl_id->name, dummy_str, dummy);
5530
5531 /* nii_date */
5532 p = xdr_inline_decode(xdr, 12);
5533 if (unlikely(!p))
5534 goto out_overflow;
5535 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5536 res->impl_id->date.nseconds = be32_to_cpup(p);
5537
5538 /* if there's more than one entry, ignore the rest */
5539 }
5540 return 0;
5541 out_overflow:
5542 print_overflow_msg(__func__, xdr);
5543 return -EIO;
5544 }
5545
5546 static int decode_chan_attrs(struct xdr_stream *xdr,
5547 struct nfs4_channel_attrs *attrs)
5548 {
5549 __be32 *p;
5550 u32 nr_attrs, val;
5551
5552 p = xdr_inline_decode(xdr, 28);
5553 if (unlikely(!p))
5554 goto out_overflow;
5555 val = be32_to_cpup(p++); /* headerpadsz */
5556 if (val)
5557 return -EINVAL; /* no support for header padding yet */
5558 attrs->max_rqst_sz = be32_to_cpup(p++);
5559 attrs->max_resp_sz = be32_to_cpup(p++);
5560 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5561 attrs->max_ops = be32_to_cpup(p++);
5562 attrs->max_reqs = be32_to_cpup(p++);
5563 nr_attrs = be32_to_cpup(p);
5564 if (unlikely(nr_attrs > 1)) {
5565 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5566 "count %u\n", __func__, nr_attrs);
5567 return -EINVAL;
5568 }
5569 if (nr_attrs == 1) {
5570 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5571 if (unlikely(!p))
5572 goto out_overflow;
5573 }
5574 return 0;
5575 out_overflow:
5576 print_overflow_msg(__func__, xdr);
5577 return -EIO;
5578 }
5579
5580 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5581 {
5582 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5583 }
5584
5585 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5586 struct nfs41_bind_conn_to_session_res *res)
5587 {
5588 __be32 *p;
5589 int status;
5590
5591 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5592 if (!status)
5593 status = decode_sessionid(xdr, &res->session->sess_id);
5594 if (unlikely(status))
5595 return status;
5596
5597 /* dir flags, rdma mode bool */
5598 p = xdr_inline_decode(xdr, 8);
5599 if (unlikely(!p))
5600 goto out_overflow;
5601
5602 res->dir = be32_to_cpup(p++);
5603 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5604 return -EIO;
5605 if (be32_to_cpup(p) == 0)
5606 res->use_conn_in_rdma_mode = false;
5607 else
5608 res->use_conn_in_rdma_mode = true;
5609
5610 return 0;
5611 out_overflow:
5612 print_overflow_msg(__func__, xdr);
5613 return -EIO;
5614 }
5615
5616 static int decode_create_session(struct xdr_stream *xdr,
5617 struct nfs41_create_session_res *res)
5618 {
5619 __be32 *p;
5620 int status;
5621 struct nfs_client *clp = res->client;
5622 struct nfs4_session *session = clp->cl_session;
5623
5624 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5625 if (!status)
5626 status = decode_sessionid(xdr, &session->sess_id);
5627 if (unlikely(status))
5628 return status;
5629
5630 /* seqid, flags */
5631 p = xdr_inline_decode(xdr, 8);
5632 if (unlikely(!p))
5633 goto out_overflow;
5634 clp->cl_seqid = be32_to_cpup(p++);
5635 session->flags = be32_to_cpup(p);
5636
5637 /* Channel attributes */
5638 status = decode_chan_attrs(xdr, &session->fc_attrs);
5639 if (!status)
5640 status = decode_chan_attrs(xdr, &session->bc_attrs);
5641 return status;
5642 out_overflow:
5643 print_overflow_msg(__func__, xdr);
5644 return -EIO;
5645 }
5646
5647 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5648 {
5649 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5650 }
5651
5652 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5653 {
5654 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5655 }
5656
5657 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5658 {
5659 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5660 }
5661 #endif /* CONFIG_NFS_V4_1 */
5662
5663 static int decode_sequence(struct xdr_stream *xdr,
5664 struct nfs4_sequence_res *res,
5665 struct rpc_rqst *rqstp)
5666 {
5667 #if defined(CONFIG_NFS_V4_1)
5668 struct nfs4_session *session;
5669 struct nfs4_sessionid id;
5670 u32 dummy;
5671 int status;
5672 __be32 *p;
5673
5674 if (res->sr_slot == NULL)
5675 return 0;
5676 if (!res->sr_slot->table->session)
5677 return 0;
5678
5679 status = decode_op_hdr(xdr, OP_SEQUENCE);
5680 if (!status)
5681 status = decode_sessionid(xdr, &id);
5682 if (unlikely(status))
5683 goto out_err;
5684
5685 /*
5686 * If the server returns different values for sessionID, slotID or
5687 * sequence number, the server is looney tunes.
5688 */
5689 status = -EREMOTEIO;
5690 session = res->sr_slot->table->session;
5691
5692 if (memcmp(id.data, session->sess_id.data,
5693 NFS4_MAX_SESSIONID_LEN)) {
5694 dprintk("%s Invalid session id\n", __func__);
5695 goto out_err;
5696 }
5697
5698 p = xdr_inline_decode(xdr, 20);
5699 if (unlikely(!p))
5700 goto out_overflow;
5701
5702 /* seqid */
5703 dummy = be32_to_cpup(p++);
5704 if (dummy != res->sr_slot->seq_nr) {
5705 dprintk("%s Invalid sequence number\n", __func__);
5706 goto out_err;
5707 }
5708 /* slot id */
5709 dummy = be32_to_cpup(p++);
5710 if (dummy != res->sr_slot->slot_nr) {
5711 dprintk("%s Invalid slot id\n", __func__);
5712 goto out_err;
5713 }
5714 /* highest slot id */
5715 res->sr_highest_slotid = be32_to_cpup(p++);
5716 /* target highest slot id */
5717 res->sr_target_highest_slotid = be32_to_cpup(p++);
5718 /* result flags */
5719 res->sr_status_flags = be32_to_cpup(p);
5720 status = 0;
5721 out_err:
5722 res->sr_status = status;
5723 return status;
5724 out_overflow:
5725 print_overflow_msg(__func__, xdr);
5726 status = -EIO;
5727 goto out_err;
5728 #else /* CONFIG_NFS_V4_1 */
5729 return 0;
5730 #endif /* CONFIG_NFS_V4_1 */
5731 }
5732
5733 #if defined(CONFIG_NFS_V4_1)
5734 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5735 struct pnfs_device *pdev)
5736 {
5737 __be32 *p;
5738 uint32_t len, type;
5739 int status;
5740
5741 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5742 if (status) {
5743 if (status == -ETOOSMALL) {
5744 p = xdr_inline_decode(xdr, 4);
5745 if (unlikely(!p))
5746 goto out_overflow;
5747 pdev->mincount = be32_to_cpup(p);
5748 dprintk("%s: Min count too small. mincnt = %u\n",
5749 __func__, pdev->mincount);
5750 }
5751 return status;
5752 }
5753
5754 p = xdr_inline_decode(xdr, 8);
5755 if (unlikely(!p))
5756 goto out_overflow;
5757 type = be32_to_cpup(p++);
5758 if (type != pdev->layout_type) {
5759 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5760 __func__, pdev->layout_type, type);
5761 return -EINVAL;
5762 }
5763 /*
5764 * Get the length of the opaque device_addr4. xdr_read_pages places
5765 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5766 * and places the remaining xdr data in xdr_buf->tail
5767 */
5768 pdev->mincount = be32_to_cpup(p);
5769 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5770 goto out_overflow;
5771
5772 /* Parse notification bitmap, verifying that it is zero. */
5773 p = xdr_inline_decode(xdr, 4);
5774 if (unlikely(!p))
5775 goto out_overflow;
5776 len = be32_to_cpup(p);
5777 if (len) {
5778 uint32_t i;
5779
5780 p = xdr_inline_decode(xdr, 4 * len);
5781 if (unlikely(!p))
5782 goto out_overflow;
5783
5784 if (be32_to_cpup(p++) &
5785 ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5786 dprintk("%s: unsupported notification\n",
5787 __func__);
5788 }
5789
5790 for (i = 1; i < len; i++) {
5791 if (be32_to_cpup(p++)) {
5792 dprintk("%s: unsupported notification\n",
5793 __func__);
5794 return -EIO;
5795 }
5796 }
5797 }
5798 return 0;
5799 out_overflow:
5800 print_overflow_msg(__func__, xdr);
5801 return -EIO;
5802 }
5803
5804 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5805 struct nfs4_layoutget_res *res)
5806 {
5807 __be32 *p;
5808 int status;
5809 u32 layout_count;
5810 u32 recvd;
5811
5812 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5813 if (status)
5814 return status;
5815 p = xdr_inline_decode(xdr, 4);
5816 if (unlikely(!p))
5817 goto out_overflow;
5818 res->return_on_close = be32_to_cpup(p);
5819 decode_stateid(xdr, &res->stateid);
5820 p = xdr_inline_decode(xdr, 4);
5821 if (unlikely(!p))
5822 goto out_overflow;
5823 layout_count = be32_to_cpup(p);
5824 if (!layout_count) {
5825 dprintk("%s: server responded with empty layout array\n",
5826 __func__);
5827 return -EINVAL;
5828 }
5829
5830 p = xdr_inline_decode(xdr, 28);
5831 if (unlikely(!p))
5832 goto out_overflow;
5833 p = xdr_decode_hyper(p, &res->range.offset);
5834 p = xdr_decode_hyper(p, &res->range.length);
5835 res->range.iomode = be32_to_cpup(p++);
5836 res->type = be32_to_cpup(p++);
5837 res->layoutp->len = be32_to_cpup(p);
5838
5839 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5840 __func__,
5841 (unsigned long)res->range.offset,
5842 (unsigned long)res->range.length,
5843 res->range.iomode,
5844 res->type,
5845 res->layoutp->len);
5846
5847 recvd = xdr_read_pages(xdr, res->layoutp->len);
5848 if (res->layoutp->len > recvd) {
5849 dprintk("NFS: server cheating in layoutget reply: "
5850 "layout len %u > recvd %u\n",
5851 res->layoutp->len, recvd);
5852 return -EINVAL;
5853 }
5854
5855 if (layout_count > 1) {
5856 /* We only handle a length one array at the moment. Any
5857 * further entries are just ignored. Note that this means
5858 * the client may see a response that is less than the
5859 * minimum it requested.
5860 */
5861 dprintk("%s: server responded with %d layouts, dropping tail\n",
5862 __func__, layout_count);
5863 }
5864
5865 return 0;
5866 out_overflow:
5867 print_overflow_msg(__func__, xdr);
5868 return -EIO;
5869 }
5870
5871 static int decode_layoutreturn(struct xdr_stream *xdr,
5872 struct nfs4_layoutreturn_res *res)
5873 {
5874 __be32 *p;
5875 int status;
5876
5877 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5878 if (status)
5879 return status;
5880 p = xdr_inline_decode(xdr, 4);
5881 if (unlikely(!p))
5882 goto out_overflow;
5883 res->lrs_present = be32_to_cpup(p);
5884 if (res->lrs_present)
5885 status = decode_stateid(xdr, &res->stateid);
5886 return status;
5887 out_overflow:
5888 print_overflow_msg(__func__, xdr);
5889 return -EIO;
5890 }
5891
5892 static int decode_layoutcommit(struct xdr_stream *xdr,
5893 struct rpc_rqst *req,
5894 struct nfs4_layoutcommit_res *res)
5895 {
5896 __be32 *p;
5897 __u32 sizechanged;
5898 int status;
5899
5900 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5901 res->status = status;
5902 if (status)
5903 return status;
5904
5905 p = xdr_inline_decode(xdr, 4);
5906 if (unlikely(!p))
5907 goto out_overflow;
5908 sizechanged = be32_to_cpup(p);
5909
5910 if (sizechanged) {
5911 /* throw away new size */
5912 p = xdr_inline_decode(xdr, 8);
5913 if (unlikely(!p))
5914 goto out_overflow;
5915 }
5916 return 0;
5917 out_overflow:
5918 print_overflow_msg(__func__, xdr);
5919 return -EIO;
5920 }
5921
5922 static int decode_test_stateid(struct xdr_stream *xdr,
5923 struct nfs41_test_stateid_res *res)
5924 {
5925 __be32 *p;
5926 int status;
5927 int num_res;
5928
5929 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5930 if (status)
5931 return status;
5932
5933 p = xdr_inline_decode(xdr, 4);
5934 if (unlikely(!p))
5935 goto out_overflow;
5936 num_res = be32_to_cpup(p++);
5937 if (num_res != 1)
5938 goto out;
5939
5940 p = xdr_inline_decode(xdr, 4);
5941 if (unlikely(!p))
5942 goto out_overflow;
5943 res->status = be32_to_cpup(p++);
5944
5945 return status;
5946 out_overflow:
5947 print_overflow_msg(__func__, xdr);
5948 out:
5949 return -EIO;
5950 }
5951
5952 static int decode_free_stateid(struct xdr_stream *xdr,
5953 struct nfs41_free_stateid_res *res)
5954 {
5955 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5956 return res->status;
5957 }
5958 #endif /* CONFIG_NFS_V4_1 */
5959
5960 /*
5961 * END OF "GENERIC" DECODE ROUTINES.
5962 */
5963
5964 /*
5965 * Decode OPEN_DOWNGRADE response
5966 */
5967 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5968 struct xdr_stream *xdr,
5969 struct nfs_closeres *res)
5970 {
5971 struct compound_hdr hdr;
5972 int status;
5973
5974 status = decode_compound_hdr(xdr, &hdr);
5975 if (status)
5976 goto out;
5977 status = decode_sequence(xdr, &res->seq_res, rqstp);
5978 if (status)
5979 goto out;
5980 status = decode_putfh(xdr);
5981 if (status)
5982 goto out;
5983 status = decode_open_downgrade(xdr, res);
5984 if (status != 0)
5985 goto out;
5986 decode_getfattr(xdr, res->fattr, res->server);
5987 out:
5988 return status;
5989 }
5990
5991 /*
5992 * Decode ACCESS response
5993 */
5994 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5995 struct nfs4_accessres *res)
5996 {
5997 struct compound_hdr hdr;
5998 int status;
5999
6000 status = decode_compound_hdr(xdr, &hdr);
6001 if (status)
6002 goto out;
6003 status = decode_sequence(xdr, &res->seq_res, rqstp);
6004 if (status)
6005 goto out;
6006 status = decode_putfh(xdr);
6007 if (status != 0)
6008 goto out;
6009 status = decode_access(xdr, &res->supported, &res->access);
6010 if (status != 0)
6011 goto out;
6012 decode_getfattr(xdr, res->fattr, res->server);
6013 out:
6014 return status;
6015 }
6016
6017 /*
6018 * Decode LOOKUP response
6019 */
6020 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6021 struct nfs4_lookup_res *res)
6022 {
6023 struct compound_hdr hdr;
6024 int status;
6025
6026 status = decode_compound_hdr(xdr, &hdr);
6027 if (status)
6028 goto out;
6029 status = decode_sequence(xdr, &res->seq_res, rqstp);
6030 if (status)
6031 goto out;
6032 status = decode_putfh(xdr);
6033 if (status)
6034 goto out;
6035 status = decode_lookup(xdr);
6036 if (status)
6037 goto out;
6038 status = decode_getfh(xdr, res->fh);
6039 if (status)
6040 goto out;
6041 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6042 out:
6043 return status;
6044 }
6045
6046 /*
6047 * Decode LOOKUP_ROOT response
6048 */
6049 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6050 struct xdr_stream *xdr,
6051 struct nfs4_lookup_res *res)
6052 {
6053 struct compound_hdr hdr;
6054 int status;
6055
6056 status = decode_compound_hdr(xdr, &hdr);
6057 if (status)
6058 goto out;
6059 status = decode_sequence(xdr, &res->seq_res, rqstp);
6060 if (status)
6061 goto out;
6062 status = decode_putrootfh(xdr);
6063 if (status)
6064 goto out;
6065 status = decode_getfh(xdr, res->fh);
6066 if (status == 0)
6067 status = decode_getfattr_label(xdr, res->fattr,
6068 res->label, res->server);
6069 out:
6070 return status;
6071 }
6072
6073 /*
6074 * Decode REMOVE response
6075 */
6076 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6077 struct nfs_removeres *res)
6078 {
6079 struct compound_hdr hdr;
6080 int status;
6081
6082 status = decode_compound_hdr(xdr, &hdr);
6083 if (status)
6084 goto out;
6085 status = decode_sequence(xdr, &res->seq_res, rqstp);
6086 if (status)
6087 goto out;
6088 status = decode_putfh(xdr);
6089 if (status)
6090 goto out;
6091 status = decode_remove(xdr, &res->cinfo);
6092 out:
6093 return status;
6094 }
6095
6096 /*
6097 * Decode RENAME response
6098 */
6099 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6100 struct nfs_renameres *res)
6101 {
6102 struct compound_hdr hdr;
6103 int status;
6104
6105 status = decode_compound_hdr(xdr, &hdr);
6106 if (status)
6107 goto out;
6108 status = decode_sequence(xdr, &res->seq_res, rqstp);
6109 if (status)
6110 goto out;
6111 status = decode_putfh(xdr);
6112 if (status)
6113 goto out;
6114 status = decode_savefh(xdr);
6115 if (status)
6116 goto out;
6117 status = decode_putfh(xdr);
6118 if (status)
6119 goto out;
6120 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6121 out:
6122 return status;
6123 }
6124
6125 /*
6126 * Decode LINK response
6127 */
6128 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6129 struct nfs4_link_res *res)
6130 {
6131 struct compound_hdr hdr;
6132 int status;
6133
6134 status = decode_compound_hdr(xdr, &hdr);
6135 if (status)
6136 goto out;
6137 status = decode_sequence(xdr, &res->seq_res, rqstp);
6138 if (status)
6139 goto out;
6140 status = decode_putfh(xdr);
6141 if (status)
6142 goto out;
6143 status = decode_savefh(xdr);
6144 if (status)
6145 goto out;
6146 status = decode_putfh(xdr);
6147 if (status)
6148 goto out;
6149 status = decode_link(xdr, &res->cinfo);
6150 if (status)
6151 goto out;
6152 /*
6153 * Note order: OP_LINK leaves the directory as the current
6154 * filehandle.
6155 */
6156 status = decode_restorefh(xdr);
6157 if (status)
6158 goto out;
6159 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6160 out:
6161 return status;
6162 }
6163
6164 /*
6165 * Decode CREATE response
6166 */
6167 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6168 struct nfs4_create_res *res)
6169 {
6170 struct compound_hdr hdr;
6171 int status;
6172
6173 status = decode_compound_hdr(xdr, &hdr);
6174 if (status)
6175 goto out;
6176 status = decode_sequence(xdr, &res->seq_res, rqstp);
6177 if (status)
6178 goto out;
6179 status = decode_putfh(xdr);
6180 if (status)
6181 goto out;
6182 status = decode_create(xdr, &res->dir_cinfo);
6183 if (status)
6184 goto out;
6185 status = decode_getfh(xdr, res->fh);
6186 if (status)
6187 goto out;
6188 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6189 out:
6190 return status;
6191 }
6192
6193 /*
6194 * Decode SYMLINK response
6195 */
6196 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6197 struct nfs4_create_res *res)
6198 {
6199 return nfs4_xdr_dec_create(rqstp, xdr, res);
6200 }
6201
6202 /*
6203 * Decode GETATTR response
6204 */
6205 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6206 struct nfs4_getattr_res *res)
6207 {
6208 struct compound_hdr hdr;
6209 int status;
6210
6211 status = decode_compound_hdr(xdr, &hdr);
6212 if (status)
6213 goto out;
6214 status = decode_sequence(xdr, &res->seq_res, rqstp);
6215 if (status)
6216 goto out;
6217 status = decode_putfh(xdr);
6218 if (status)
6219 goto out;
6220 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6221 out:
6222 return status;
6223 }
6224
6225 /*
6226 * Encode an SETACL request
6227 */
6228 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6229 struct nfs_setaclargs *args)
6230 {
6231 struct compound_hdr hdr = {
6232 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6233 };
6234
6235 encode_compound_hdr(xdr, req, &hdr);
6236 encode_sequence(xdr, &args->seq_args, &hdr);
6237 encode_putfh(xdr, args->fh, &hdr);
6238 encode_setacl(xdr, args, &hdr);
6239 encode_nops(&hdr);
6240 }
6241
6242 /*
6243 * Decode SETACL response
6244 */
6245 static int
6246 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6247 struct nfs_setaclres *res)
6248 {
6249 struct compound_hdr hdr;
6250 int status;
6251
6252 status = decode_compound_hdr(xdr, &hdr);
6253 if (status)
6254 goto out;
6255 status = decode_sequence(xdr, &res->seq_res, rqstp);
6256 if (status)
6257 goto out;
6258 status = decode_putfh(xdr);
6259 if (status)
6260 goto out;
6261 status = decode_setattr(xdr);
6262 out:
6263 return status;
6264 }
6265
6266 /*
6267 * Decode GETACL response
6268 */
6269 static int
6270 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6271 struct nfs_getaclres *res)
6272 {
6273 struct compound_hdr hdr;
6274 int status;
6275
6276 if (res->acl_scratch != NULL) {
6277 void *p = page_address(res->acl_scratch);
6278 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6279 }
6280 status = decode_compound_hdr(xdr, &hdr);
6281 if (status)
6282 goto out;
6283 status = decode_sequence(xdr, &res->seq_res, rqstp);
6284 if (status)
6285 goto out;
6286 status = decode_putfh(xdr);
6287 if (status)
6288 goto out;
6289 status = decode_getacl(xdr, rqstp, res);
6290
6291 out:
6292 return status;
6293 }
6294
6295 /*
6296 * Decode CLOSE response
6297 */
6298 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299 struct nfs_closeres *res)
6300 {
6301 struct compound_hdr hdr;
6302 int status;
6303
6304 status = decode_compound_hdr(xdr, &hdr);
6305 if (status)
6306 goto out;
6307 status = decode_sequence(xdr, &res->seq_res, rqstp);
6308 if (status)
6309 goto out;
6310 status = decode_putfh(xdr);
6311 if (status)
6312 goto out;
6313 status = decode_close(xdr, res);
6314 if (status != 0)
6315 goto out;
6316 /*
6317 * Note: Server may do delete on close for this file
6318 * in which case the getattr call will fail with
6319 * an ESTALE error. Shouldn't be a problem,
6320 * though, since fattr->valid will remain unset.
6321 */
6322 decode_getfattr(xdr, res->fattr, res->server);
6323 out:
6324 return status;
6325 }
6326
6327 /*
6328 * Decode OPEN response
6329 */
6330 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6331 struct nfs_openres *res)
6332 {
6333 struct compound_hdr hdr;
6334 int status;
6335
6336 status = decode_compound_hdr(xdr, &hdr);
6337 if (status)
6338 goto out;
6339 status = decode_sequence(xdr, &res->seq_res, rqstp);
6340 if (status)
6341 goto out;
6342 status = decode_putfh(xdr);
6343 if (status)
6344 goto out;
6345 status = decode_open(xdr, res);
6346 if (status)
6347 goto out;
6348 status = decode_getfh(xdr, &res->fh);
6349 if (status)
6350 goto out;
6351 if (res->access_request)
6352 decode_access(xdr, &res->access_supported, &res->access_result);
6353 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6354 out:
6355 return status;
6356 }
6357
6358 /*
6359 * Decode OPEN_CONFIRM response
6360 */
6361 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6362 struct xdr_stream *xdr,
6363 struct nfs_open_confirmres *res)
6364 {
6365 struct compound_hdr hdr;
6366 int status;
6367
6368 status = decode_compound_hdr(xdr, &hdr);
6369 if (status)
6370 goto out;
6371 status = decode_putfh(xdr);
6372 if (status)
6373 goto out;
6374 status = decode_open_confirm(xdr, res);
6375 out:
6376 return status;
6377 }
6378
6379 /*
6380 * Decode OPEN response
6381 */
6382 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6383 struct xdr_stream *xdr,
6384 struct nfs_openres *res)
6385 {
6386 struct compound_hdr hdr;
6387 int status;
6388
6389 status = decode_compound_hdr(xdr, &hdr);
6390 if (status)
6391 goto out;
6392 status = decode_sequence(xdr, &res->seq_res, rqstp);
6393 if (status)
6394 goto out;
6395 status = decode_putfh(xdr);
6396 if (status)
6397 goto out;
6398 status = decode_open(xdr, res);
6399 if (status)
6400 goto out;
6401 if (res->access_request)
6402 decode_access(xdr, &res->access_supported, &res->access_result);
6403 decode_getfattr(xdr, res->f_attr, res->server);
6404 out:
6405 return status;
6406 }
6407
6408 /*
6409 * Decode SETATTR response
6410 */
6411 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6412 struct xdr_stream *xdr,
6413 struct nfs_setattrres *res)
6414 {
6415 struct compound_hdr hdr;
6416 int status;
6417
6418 status = decode_compound_hdr(xdr, &hdr);
6419 if (status)
6420 goto out;
6421 status = decode_sequence(xdr, &res->seq_res, rqstp);
6422 if (status)
6423 goto out;
6424 status = decode_putfh(xdr);
6425 if (status)
6426 goto out;
6427 status = decode_setattr(xdr);
6428 if (status)
6429 goto out;
6430 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6431 out:
6432 return status;
6433 }
6434
6435 /*
6436 * Decode LOCK response
6437 */
6438 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439 struct nfs_lock_res *res)
6440 {
6441 struct compound_hdr hdr;
6442 int status;
6443
6444 status = decode_compound_hdr(xdr, &hdr);
6445 if (status)
6446 goto out;
6447 status = decode_sequence(xdr, &res->seq_res, rqstp);
6448 if (status)
6449 goto out;
6450 status = decode_putfh(xdr);
6451 if (status)
6452 goto out;
6453 status = decode_lock(xdr, res);
6454 out:
6455 return status;
6456 }
6457
6458 /*
6459 * Decode LOCKT response
6460 */
6461 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6462 struct nfs_lockt_res *res)
6463 {
6464 struct compound_hdr hdr;
6465 int status;
6466
6467 status = decode_compound_hdr(xdr, &hdr);
6468 if (status)
6469 goto out;
6470 status = decode_sequence(xdr, &res->seq_res, rqstp);
6471 if (status)
6472 goto out;
6473 status = decode_putfh(xdr);
6474 if (status)
6475 goto out;
6476 status = decode_lockt(xdr, res);
6477 out:
6478 return status;
6479 }
6480
6481 /*
6482 * Decode LOCKU response
6483 */
6484 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6485 struct nfs_locku_res *res)
6486 {
6487 struct compound_hdr hdr;
6488 int status;
6489
6490 status = decode_compound_hdr(xdr, &hdr);
6491 if (status)
6492 goto out;
6493 status = decode_sequence(xdr, &res->seq_res, rqstp);
6494 if (status)
6495 goto out;
6496 status = decode_putfh(xdr);
6497 if (status)
6498 goto out;
6499 status = decode_locku(xdr, res);
6500 out:
6501 return status;
6502 }
6503
6504 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6505 struct xdr_stream *xdr, void *dummy)
6506 {
6507 struct compound_hdr hdr;
6508 int status;
6509
6510 status = decode_compound_hdr(xdr, &hdr);
6511 if (!status)
6512 status = decode_release_lockowner(xdr);
6513 return status;
6514 }
6515
6516 /*
6517 * Decode READLINK response
6518 */
6519 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6520 struct xdr_stream *xdr,
6521 struct nfs4_readlink_res *res)
6522 {
6523 struct compound_hdr hdr;
6524 int status;
6525
6526 status = decode_compound_hdr(xdr, &hdr);
6527 if (status)
6528 goto out;
6529 status = decode_sequence(xdr, &res->seq_res, rqstp);
6530 if (status)
6531 goto out;
6532 status = decode_putfh(xdr);
6533 if (status)
6534 goto out;
6535 status = decode_readlink(xdr, rqstp);
6536 out:
6537 return status;
6538 }
6539
6540 /*
6541 * Decode READDIR response
6542 */
6543 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6544 struct nfs4_readdir_res *res)
6545 {
6546 struct compound_hdr hdr;
6547 int status;
6548
6549 status = decode_compound_hdr(xdr, &hdr);
6550 if (status)
6551 goto out;
6552 status = decode_sequence(xdr, &res->seq_res, rqstp);
6553 if (status)
6554 goto out;
6555 status = decode_putfh(xdr);
6556 if (status)
6557 goto out;
6558 status = decode_readdir(xdr, rqstp, res);
6559 out:
6560 return status;
6561 }
6562
6563 /*
6564 * Decode Read response
6565 */
6566 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6567 struct nfs_pgio_res *res)
6568 {
6569 struct compound_hdr hdr;
6570 int status;
6571
6572 status = decode_compound_hdr(xdr, &hdr);
6573 if (status)
6574 goto out;
6575 status = decode_sequence(xdr, &res->seq_res, rqstp);
6576 if (status)
6577 goto out;
6578 status = decode_putfh(xdr);
6579 if (status)
6580 goto out;
6581 status = decode_read(xdr, rqstp, res);
6582 if (!status)
6583 status = res->count;
6584 out:
6585 return status;
6586 }
6587
6588 /*
6589 * Decode WRITE response
6590 */
6591 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6592 struct nfs_pgio_res *res)
6593 {
6594 struct compound_hdr hdr;
6595 int status;
6596
6597 status = decode_compound_hdr(xdr, &hdr);
6598 if (status)
6599 goto out;
6600 status = decode_sequence(xdr, &res->seq_res, rqstp);
6601 if (status)
6602 goto out;
6603 status = decode_putfh(xdr);
6604 if (status)
6605 goto out;
6606 status = decode_write(xdr, res);
6607 if (status)
6608 goto out;
6609 if (res->fattr)
6610 decode_getfattr(xdr, res->fattr, res->server);
6611 if (!status)
6612 status = res->count;
6613 out:
6614 return status;
6615 }
6616
6617 /*
6618 * Decode COMMIT response
6619 */
6620 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6621 struct nfs_commitres *res)
6622 {
6623 struct compound_hdr hdr;
6624 int status;
6625
6626 status = decode_compound_hdr(xdr, &hdr);
6627 if (status)
6628 goto out;
6629 status = decode_sequence(xdr, &res->seq_res, rqstp);
6630 if (status)
6631 goto out;
6632 status = decode_putfh(xdr);
6633 if (status)
6634 goto out;
6635 status = decode_commit(xdr, res);
6636 out:
6637 return status;
6638 }
6639
6640 /*
6641 * Decode FSINFO response
6642 */
6643 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6644 struct nfs4_fsinfo_res *res)
6645 {
6646 struct compound_hdr hdr;
6647 int status;
6648
6649 status = decode_compound_hdr(xdr, &hdr);
6650 if (!status)
6651 status = decode_sequence(xdr, &res->seq_res, req);
6652 if (!status)
6653 status = decode_putfh(xdr);
6654 if (!status)
6655 status = decode_fsinfo(xdr, res->fsinfo);
6656 return status;
6657 }
6658
6659 /*
6660 * Decode PATHCONF response
6661 */
6662 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6663 struct nfs4_pathconf_res *res)
6664 {
6665 struct compound_hdr hdr;
6666 int status;
6667
6668 status = decode_compound_hdr(xdr, &hdr);
6669 if (!status)
6670 status = decode_sequence(xdr, &res->seq_res, req);
6671 if (!status)
6672 status = decode_putfh(xdr);
6673 if (!status)
6674 status = decode_pathconf(xdr, res->pathconf);
6675 return status;
6676 }
6677
6678 /*
6679 * Decode STATFS response
6680 */
6681 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6682 struct nfs4_statfs_res *res)
6683 {
6684 struct compound_hdr hdr;
6685 int status;
6686
6687 status = decode_compound_hdr(xdr, &hdr);
6688 if (!status)
6689 status = decode_sequence(xdr, &res->seq_res, req);
6690 if (!status)
6691 status = decode_putfh(xdr);
6692 if (!status)
6693 status = decode_statfs(xdr, res->fsstat);
6694 return status;
6695 }
6696
6697 /*
6698 * Decode GETATTR_BITMAP response
6699 */
6700 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6701 struct xdr_stream *xdr,
6702 struct nfs4_server_caps_res *res)
6703 {
6704 struct compound_hdr hdr;
6705 int status;
6706
6707 status = decode_compound_hdr(xdr, &hdr);
6708 if (status)
6709 goto out;
6710 status = decode_sequence(xdr, &res->seq_res, req);
6711 if (status)
6712 goto out;
6713 status = decode_putfh(xdr);
6714 if (status)
6715 goto out;
6716 status = decode_server_caps(xdr, res);
6717 out:
6718 return status;
6719 }
6720
6721 /*
6722 * Decode RENEW response
6723 */
6724 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725 void *__unused)
6726 {
6727 struct compound_hdr hdr;
6728 int status;
6729
6730 status = decode_compound_hdr(xdr, &hdr);
6731 if (!status)
6732 status = decode_renew(xdr);
6733 return status;
6734 }
6735
6736 /*
6737 * Decode SETCLIENTID response
6738 */
6739 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6740 struct xdr_stream *xdr,
6741 struct nfs4_setclientid_res *res)
6742 {
6743 struct compound_hdr hdr;
6744 int status;
6745
6746 status = decode_compound_hdr(xdr, &hdr);
6747 if (!status)
6748 status = decode_setclientid(xdr, res);
6749 return status;
6750 }
6751
6752 /*
6753 * Decode SETCLIENTID_CONFIRM response
6754 */
6755 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6756 struct xdr_stream *xdr)
6757 {
6758 struct compound_hdr hdr;
6759 int status;
6760
6761 status = decode_compound_hdr(xdr, &hdr);
6762 if (!status)
6763 status = decode_setclientid_confirm(xdr);
6764 return status;
6765 }
6766
6767 /*
6768 * Decode DELEGRETURN response
6769 */
6770 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6771 struct xdr_stream *xdr,
6772 struct nfs4_delegreturnres *res)
6773 {
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (status)
6779 goto out;
6780 status = decode_sequence(xdr, &res->seq_res, rqstp);
6781 if (status)
6782 goto out;
6783 status = decode_putfh(xdr);
6784 if (status != 0)
6785 goto out;
6786 status = decode_getfattr(xdr, res->fattr, res->server);
6787 if (status != 0)
6788 goto out;
6789 status = decode_delegreturn(xdr);
6790 out:
6791 return status;
6792 }
6793
6794 /*
6795 * Decode FS_LOCATIONS response
6796 */
6797 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6798 struct xdr_stream *xdr,
6799 struct nfs4_fs_locations_res *res)
6800 {
6801 struct compound_hdr hdr;
6802 int status;
6803
6804 status = decode_compound_hdr(xdr, &hdr);
6805 if (status)
6806 goto out;
6807 status = decode_sequence(xdr, &res->seq_res, req);
6808 if (status)
6809 goto out;
6810 status = decode_putfh(xdr);
6811 if (status)
6812 goto out;
6813 if (res->migration) {
6814 xdr_enter_page(xdr, PAGE_SIZE);
6815 status = decode_getfattr_generic(xdr,
6816 &res->fs_locations->fattr,
6817 NULL, res->fs_locations,
6818 NULL, res->fs_locations->server);
6819 if (status)
6820 goto out;
6821 if (res->renew)
6822 status = decode_renew(xdr);
6823 } else {
6824 status = decode_lookup(xdr);
6825 if (status)
6826 goto out;
6827 xdr_enter_page(xdr, PAGE_SIZE);
6828 status = decode_getfattr_generic(xdr,
6829 &res->fs_locations->fattr,
6830 NULL, res->fs_locations,
6831 NULL, res->fs_locations->server);
6832 }
6833 out:
6834 return status;
6835 }
6836
6837 /*
6838 * Decode SECINFO response
6839 */
6840 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6841 struct xdr_stream *xdr,
6842 struct nfs4_secinfo_res *res)
6843 {
6844 struct compound_hdr hdr;
6845 int status;
6846
6847 status = decode_compound_hdr(xdr, &hdr);
6848 if (status)
6849 goto out;
6850 status = decode_sequence(xdr, &res->seq_res, rqstp);
6851 if (status)
6852 goto out;
6853 status = decode_putfh(xdr);
6854 if (status)
6855 goto out;
6856 status = decode_secinfo(xdr, res);
6857 out:
6858 return status;
6859 }
6860
6861 /*
6862 * Decode FSID_PRESENT response
6863 */
6864 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6865 struct xdr_stream *xdr,
6866 struct nfs4_fsid_present_res *res)
6867 {
6868 struct compound_hdr hdr;
6869 int status;
6870
6871 status = decode_compound_hdr(xdr, &hdr);
6872 if (status)
6873 goto out;
6874 status = decode_sequence(xdr, &res->seq_res, rqstp);
6875 if (status)
6876 goto out;
6877 status = decode_putfh(xdr);
6878 if (status)
6879 goto out;
6880 status = decode_getfh(xdr, res->fh);
6881 if (status)
6882 goto out;
6883 if (res->renew)
6884 status = decode_renew(xdr);
6885 out:
6886 return status;
6887 }
6888
6889 #if defined(CONFIG_NFS_V4_1)
6890 /*
6891 * Decode BIND_CONN_TO_SESSION response
6892 */
6893 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6894 struct xdr_stream *xdr,
6895 void *res)
6896 {
6897 struct compound_hdr hdr;
6898 int status;
6899
6900 status = decode_compound_hdr(xdr, &hdr);
6901 if (!status)
6902 status = decode_bind_conn_to_session(xdr, res);
6903 return status;
6904 }
6905
6906 /*
6907 * Decode EXCHANGE_ID response
6908 */
6909 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6910 struct xdr_stream *xdr,
6911 void *res)
6912 {
6913 struct compound_hdr hdr;
6914 int status;
6915
6916 status = decode_compound_hdr(xdr, &hdr);
6917 if (!status)
6918 status = decode_exchange_id(xdr, res);
6919 return status;
6920 }
6921
6922 /*
6923 * Decode CREATE_SESSION response
6924 */
6925 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6926 struct xdr_stream *xdr,
6927 struct nfs41_create_session_res *res)
6928 {
6929 struct compound_hdr hdr;
6930 int status;
6931
6932 status = decode_compound_hdr(xdr, &hdr);
6933 if (!status)
6934 status = decode_create_session(xdr, res);
6935 return status;
6936 }
6937
6938 /*
6939 * Decode DESTROY_SESSION response
6940 */
6941 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6942 struct xdr_stream *xdr,
6943 void *res)
6944 {
6945 struct compound_hdr hdr;
6946 int status;
6947
6948 status = decode_compound_hdr(xdr, &hdr);
6949 if (!status)
6950 status = decode_destroy_session(xdr, res);
6951 return status;
6952 }
6953
6954 /*
6955 * Decode DESTROY_CLIENTID response
6956 */
6957 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6958 struct xdr_stream *xdr,
6959 void *res)
6960 {
6961 struct compound_hdr hdr;
6962 int status;
6963
6964 status = decode_compound_hdr(xdr, &hdr);
6965 if (!status)
6966 status = decode_destroy_clientid(xdr, res);
6967 return status;
6968 }
6969
6970 /*
6971 * Decode SEQUENCE response
6972 */
6973 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6974 struct xdr_stream *xdr,
6975 struct nfs4_sequence_res *res)
6976 {
6977 struct compound_hdr hdr;
6978 int status;
6979
6980 status = decode_compound_hdr(xdr, &hdr);
6981 if (!status)
6982 status = decode_sequence(xdr, res, rqstp);
6983 return status;
6984 }
6985
6986 /*
6987 * Decode GET_LEASE_TIME response
6988 */
6989 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6990 struct xdr_stream *xdr,
6991 struct nfs4_get_lease_time_res *res)
6992 {
6993 struct compound_hdr hdr;
6994 int status;
6995
6996 status = decode_compound_hdr(xdr, &hdr);
6997 if (!status)
6998 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6999 if (!status)
7000 status = decode_putrootfh(xdr);
7001 if (!status)
7002 status = decode_fsinfo(xdr, res->lr_fsinfo);
7003 return status;
7004 }
7005
7006 /*
7007 * Decode RECLAIM_COMPLETE response
7008 */
7009 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7010 struct xdr_stream *xdr,
7011 struct nfs41_reclaim_complete_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->seq_res, rqstp);
7019 if (!status)
7020 status = decode_reclaim_complete(xdr, NULL);
7021 return status;
7022 }
7023
7024 /*
7025 * Decode GETDEVINFO response
7026 */
7027 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7028 struct xdr_stream *xdr,
7029 struct nfs4_getdeviceinfo_res *res)
7030 {
7031 struct compound_hdr hdr;
7032 int status;
7033
7034 status = decode_compound_hdr(xdr, &hdr);
7035 if (status != 0)
7036 goto out;
7037 status = decode_sequence(xdr, &res->seq_res, rqstp);
7038 if (status != 0)
7039 goto out;
7040 status = decode_getdeviceinfo(xdr, res->pdev);
7041 out:
7042 return status;
7043 }
7044
7045 /*
7046 * Decode LAYOUTGET response
7047 */
7048 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7049 struct xdr_stream *xdr,
7050 struct nfs4_layoutget_res *res)
7051 {
7052 struct compound_hdr hdr;
7053 int status;
7054
7055 status = decode_compound_hdr(xdr, &hdr);
7056 if (status)
7057 goto out;
7058 status = decode_sequence(xdr, &res->seq_res, rqstp);
7059 if (status)
7060 goto out;
7061 status = decode_putfh(xdr);
7062 if (status)
7063 goto out;
7064 status = decode_layoutget(xdr, rqstp, res);
7065 out:
7066 return status;
7067 }
7068
7069 /*
7070 * Decode LAYOUTRETURN response
7071 */
7072 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7073 struct xdr_stream *xdr,
7074 struct nfs4_layoutreturn_res *res)
7075 {
7076 struct compound_hdr hdr;
7077 int status;
7078
7079 status = decode_compound_hdr(xdr, &hdr);
7080 if (status)
7081 goto out;
7082 status = decode_sequence(xdr, &res->seq_res, rqstp);
7083 if (status)
7084 goto out;
7085 status = decode_putfh(xdr);
7086 if (status)
7087 goto out;
7088 status = decode_layoutreturn(xdr, res);
7089 out:
7090 return status;
7091 }
7092
7093 /*
7094 * Decode LAYOUTCOMMIT response
7095 */
7096 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7097 struct xdr_stream *xdr,
7098 struct nfs4_layoutcommit_res *res)
7099 {
7100 struct compound_hdr hdr;
7101 int status;
7102
7103 status = decode_compound_hdr(xdr, &hdr);
7104 if (status)
7105 goto out;
7106 status = decode_sequence(xdr, &res->seq_res, rqstp);
7107 if (status)
7108 goto out;
7109 status = decode_putfh(xdr);
7110 if (status)
7111 goto out;
7112 status = decode_layoutcommit(xdr, rqstp, res);
7113 if (status)
7114 goto out;
7115 decode_getfattr(xdr, res->fattr, res->server);
7116 out:
7117 return status;
7118 }
7119
7120 /*
7121 * Decode SECINFO_NO_NAME response
7122 */
7123 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7124 struct xdr_stream *xdr,
7125 struct nfs4_secinfo_res *res)
7126 {
7127 struct compound_hdr hdr;
7128 int status;
7129
7130 status = decode_compound_hdr(xdr, &hdr);
7131 if (status)
7132 goto out;
7133 status = decode_sequence(xdr, &res->seq_res, rqstp);
7134 if (status)
7135 goto out;
7136 status = decode_putrootfh(xdr);
7137 if (status)
7138 goto out;
7139 status = decode_secinfo_no_name(xdr, res);
7140 out:
7141 return status;
7142 }
7143
7144 /*
7145 * Decode TEST_STATEID response
7146 */
7147 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7148 struct xdr_stream *xdr,
7149 struct nfs41_test_stateid_res *res)
7150 {
7151 struct compound_hdr hdr;
7152 int status;
7153
7154 status = decode_compound_hdr(xdr, &hdr);
7155 if (status)
7156 goto out;
7157 status = decode_sequence(xdr, &res->seq_res, rqstp);
7158 if (status)
7159 goto out;
7160 status = decode_test_stateid(xdr, res);
7161 out:
7162 return status;
7163 }
7164
7165 /*
7166 * Decode FREE_STATEID response
7167 */
7168 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7169 struct xdr_stream *xdr,
7170 struct nfs41_free_stateid_res *res)
7171 {
7172 struct compound_hdr hdr;
7173 int status;
7174
7175 status = decode_compound_hdr(xdr, &hdr);
7176 if (status)
7177 goto out;
7178 status = decode_sequence(xdr, &res->seq_res, rqstp);
7179 if (status)
7180 goto out;
7181 status = decode_free_stateid(xdr, res);
7182 out:
7183 return status;
7184 }
7185 #endif /* CONFIG_NFS_V4_1 */
7186
7187 /**
7188 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7189 * the local page cache.
7190 * @xdr: XDR stream where entry resides
7191 * @entry: buffer to fill in with entry data
7192 * @plus: boolean indicating whether this should be a readdirplus entry
7193 *
7194 * Returns zero if successful, otherwise a negative errno value is
7195 * returned.
7196 *
7197 * This function is not invoked during READDIR reply decoding, but
7198 * rather whenever an application invokes the getdents(2) system call
7199 * on a directory already in our cache.
7200 */
7201 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7202 int plus)
7203 {
7204 unsigned int savep;
7205 uint32_t bitmap[3] = {0};
7206 uint32_t len;
7207 __be32 *p = xdr_inline_decode(xdr, 4);
7208 if (unlikely(!p))
7209 goto out_overflow;
7210 if (*p == xdr_zero) {
7211 p = xdr_inline_decode(xdr, 4);
7212 if (unlikely(!p))
7213 goto out_overflow;
7214 if (*p == xdr_zero)
7215 return -EAGAIN;
7216 entry->eof = 1;
7217 return -EBADCOOKIE;
7218 }
7219
7220 p = xdr_inline_decode(xdr, 12);
7221 if (unlikely(!p))
7222 goto out_overflow;
7223 entry->prev_cookie = entry->cookie;
7224 p = xdr_decode_hyper(p, &entry->cookie);
7225 entry->len = be32_to_cpup(p);
7226
7227 p = xdr_inline_decode(xdr, entry->len);
7228 if (unlikely(!p))
7229 goto out_overflow;
7230 entry->name = (const char *) p;
7231
7232 /*
7233 * In case the server doesn't return an inode number,
7234 * we fake one here. (We don't use inode number 0,
7235 * since glibc seems to choke on it...)
7236 */
7237 entry->ino = 1;
7238 entry->fattr->valid = 0;
7239
7240 if (decode_attr_bitmap(xdr, bitmap) < 0)
7241 goto out_overflow;
7242
7243 if (decode_attr_length(xdr, &len, &savep) < 0)
7244 goto out_overflow;
7245
7246 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7247 NULL, entry->label, entry->server) < 0)
7248 goto out_overflow;
7249 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7250 entry->ino = entry->fattr->mounted_on_fileid;
7251 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7252 entry->ino = entry->fattr->fileid;
7253
7254 entry->d_type = DT_UNKNOWN;
7255 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7256 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7257
7258 return 0;
7259
7260 out_overflow:
7261 print_overflow_msg(__func__, xdr);
7262 return -EAGAIN;
7263 }
7264
7265 /*
7266 * We need to translate between nfs status return values and
7267 * the local errno values which may not be the same.
7268 */
7269 static struct {
7270 int stat;
7271 int errno;
7272 } nfs_errtbl[] = {
7273 { NFS4_OK, 0 },
7274 { NFS4ERR_PERM, -EPERM },
7275 { NFS4ERR_NOENT, -ENOENT },
7276 { NFS4ERR_IO, -errno_NFSERR_IO},
7277 { NFS4ERR_NXIO, -ENXIO },
7278 { NFS4ERR_ACCESS, -EACCES },
7279 { NFS4ERR_EXIST, -EEXIST },
7280 { NFS4ERR_XDEV, -EXDEV },
7281 { NFS4ERR_NOTDIR, -ENOTDIR },
7282 { NFS4ERR_ISDIR, -EISDIR },
7283 { NFS4ERR_INVAL, -EINVAL },
7284 { NFS4ERR_FBIG, -EFBIG },
7285 { NFS4ERR_NOSPC, -ENOSPC },
7286 { NFS4ERR_ROFS, -EROFS },
7287 { NFS4ERR_MLINK, -EMLINK },
7288 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7289 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7290 { NFS4ERR_DQUOT, -EDQUOT },
7291 { NFS4ERR_STALE, -ESTALE },
7292 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7293 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7294 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7295 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7296 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7297 { NFS4ERR_BADTYPE, -EBADTYPE },
7298 { NFS4ERR_LOCKED, -EAGAIN },
7299 { NFS4ERR_SYMLINK, -ELOOP },
7300 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7301 { NFS4ERR_DEADLOCK, -EDEADLK },
7302 { -1, -EIO }
7303 };
7304
7305 /*
7306 * Convert an NFS error code to a local one.
7307 * This one is used jointly by NFSv2 and NFSv3.
7308 */
7309 static int
7310 nfs4_stat_to_errno(int stat)
7311 {
7312 int i;
7313 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7314 if (nfs_errtbl[i].stat == stat)
7315 return nfs_errtbl[i].errno;
7316 }
7317 if (stat <= 10000 || stat > 10100) {
7318 /* The server is looney tunes. */
7319 return -EREMOTEIO;
7320 }
7321 /* If we cannot translate the error, the recovery routines should
7322 * handle it.
7323 * Note: remaining NFSv4 error codes have values > 10000, so should
7324 * not conflict with native Linux error codes.
7325 */
7326 return -stat;
7327 }
7328
7329 #ifdef CONFIG_NFS_V4_2
7330 #include "nfs42xdr.c"
7331 #endif /* CONFIG_NFS_V4_2 */
7332
7333 #define PROC(proc, argtype, restype) \
7334 [NFSPROC4_CLNT_##proc] = { \
7335 .p_proc = NFSPROC4_COMPOUND, \
7336 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7337 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7338 .p_arglen = NFS4_##argtype##_sz, \
7339 .p_replen = NFS4_##restype##_sz, \
7340 .p_statidx = NFSPROC4_CLNT_##proc, \
7341 .p_name = #proc, \
7342 }
7343
7344 struct rpc_procinfo nfs4_procedures[] = {
7345 PROC(READ, enc_read, dec_read),
7346 PROC(WRITE, enc_write, dec_write),
7347 PROC(COMMIT, enc_commit, dec_commit),
7348 PROC(OPEN, enc_open, dec_open),
7349 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7350 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7351 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7352 PROC(CLOSE, enc_close, dec_close),
7353 PROC(SETATTR, enc_setattr, dec_setattr),
7354 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7355 PROC(RENEW, enc_renew, dec_renew),
7356 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7357 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7358 PROC(LOCK, enc_lock, dec_lock),
7359 PROC(LOCKT, enc_lockt, dec_lockt),
7360 PROC(LOCKU, enc_locku, dec_locku),
7361 PROC(ACCESS, enc_access, dec_access),
7362 PROC(GETATTR, enc_getattr, dec_getattr),
7363 PROC(LOOKUP, enc_lookup, dec_lookup),
7364 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7365 PROC(REMOVE, enc_remove, dec_remove),
7366 PROC(RENAME, enc_rename, dec_rename),
7367 PROC(LINK, enc_link, dec_link),
7368 PROC(SYMLINK, enc_symlink, dec_symlink),
7369 PROC(CREATE, enc_create, dec_create),
7370 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7371 PROC(STATFS, enc_statfs, dec_statfs),
7372 PROC(READLINK, enc_readlink, dec_readlink),
7373 PROC(READDIR, enc_readdir, dec_readdir),
7374 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7375 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7376 PROC(GETACL, enc_getacl, dec_getacl),
7377 PROC(SETACL, enc_setacl, dec_setacl),
7378 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7379 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7380 PROC(SECINFO, enc_secinfo, dec_secinfo),
7381 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7382 #if defined(CONFIG_NFS_V4_1)
7383 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7384 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7385 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7386 PROC(SEQUENCE, enc_sequence, dec_sequence),
7387 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7388 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7389 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7390 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7391 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7392 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7393 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7394 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7395 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7396 PROC(BIND_CONN_TO_SESSION,
7397 enc_bind_conn_to_session, dec_bind_conn_to_session),
7398 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7399 #endif /* CONFIG_NFS_V4_1 */
7400 #ifdef CONFIG_NFS_V4_2
7401 PROC(SEEK, enc_seek, dec_seek),
7402 PROC(ALLOCATE, enc_allocate, dec_allocate),
7403 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7404 #endif /* CONFIG_NFS_V4_2 */
7405 };
7406
7407 const struct rpc_version nfs_version4 = {
7408 .number = 4,
7409 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7410 .procs = nfs4_procedures
7411 };
7412
7413 /*
7414 * Local variables:
7415 * c-basic-offset: 8
7416 * End:
7417 */
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